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ixgbe: Add support for redirect action to cls_u32 offloads
[deliverable/linux.git] / drivers / net / ethernet / intel / ixgbe / ixgbe_main.c
1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2016 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27 *******************************************************************************/
28
29 #include <linux/types.h>
30 #include <linux/module.h>
31 #include <linux/pci.h>
32 #include <linux/netdevice.h>
33 #include <linux/vmalloc.h>
34 #include <linux/string.h>
35 #include <linux/in.h>
36 #include <linux/interrupt.h>
37 #include <linux/ip.h>
38 #include <linux/tcp.h>
39 #include <linux/sctp.h>
40 #include <linux/pkt_sched.h>
41 #include <linux/ipv6.h>
42 #include <linux/slab.h>
43 #include <net/checksum.h>
44 #include <net/ip6_checksum.h>
45 #include <linux/etherdevice.h>
46 #include <linux/ethtool.h>
47 #include <linux/if.h>
48 #include <linux/if_vlan.h>
49 #include <linux/if_macvlan.h>
50 #include <linux/if_bridge.h>
51 #include <linux/prefetch.h>
52 #include <scsi/fc/fc_fcoe.h>
53 #include <net/vxlan.h>
54 #include <net/pkt_cls.h>
55 #include <net/tc_act/tc_gact.h>
56 #include <net/tc_act/tc_mirred.h>
57
58 #include "ixgbe.h"
59 #include "ixgbe_common.h"
60 #include "ixgbe_dcb_82599.h"
61 #include "ixgbe_sriov.h"
62 #include "ixgbe_model.h"
63
64 char ixgbe_driver_name[] = "ixgbe";
65 static const char ixgbe_driver_string[] =
66 "Intel(R) 10 Gigabit PCI Express Network Driver";
67 #ifdef IXGBE_FCOE
68 char ixgbe_default_device_descr[] =
69 "Intel(R) 10 Gigabit Network Connection";
70 #else
71 static char ixgbe_default_device_descr[] =
72 "Intel(R) 10 Gigabit Network Connection";
73 #endif
74 #define DRV_VERSION "4.4.0-k"
75 const char ixgbe_driver_version[] = DRV_VERSION;
76 static const char ixgbe_copyright[] =
77 "Copyright (c) 1999-2016 Intel Corporation.";
78
79 static const char ixgbe_overheat_msg[] = "Network adapter has been stopped because it has over heated. Restart the computer. If the problem persists, power off the system and replace the adapter";
80
81 static const struct ixgbe_info *ixgbe_info_tbl[] = {
82 [board_82598] = &ixgbe_82598_info,
83 [board_82599] = &ixgbe_82599_info,
84 [board_X540] = &ixgbe_X540_info,
85 [board_X550] = &ixgbe_X550_info,
86 [board_X550EM_x] = &ixgbe_X550EM_x_info,
87 [board_x550em_a] = &ixgbe_x550em_a_info,
88 };
89
90 /* ixgbe_pci_tbl - PCI Device ID Table
91 *
92 * Wildcard entries (PCI_ANY_ID) should come last
93 * Last entry must be all 0s
94 *
95 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
96 * Class, Class Mask, private data (not used) }
97 */
98 static const struct pci_device_id ixgbe_pci_tbl[] = {
99 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598), board_82598 },
100 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT), board_82598 },
101 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT), board_82598 },
102 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT), board_82598 },
103 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2), board_82598 },
104 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4), board_82598 },
105 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT), board_82598 },
106 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT), board_82598 },
107 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM), board_82598 },
108 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR), board_82598 },
109 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM), board_82598 },
110 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX), board_82598 },
111 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4), board_82599 },
112 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM), board_82599 },
113 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR), board_82599 },
114 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP), board_82599 },
115 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM), board_82599 },
116 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ), board_82599 },
117 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4), board_82599 },
118 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_BACKPLANE_FCOE), board_82599 },
119 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_FCOE), board_82599 },
120 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM), board_82599 },
121 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE), board_82599 },
122 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T), board_X540 },
123 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF2), board_82599 },
124 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_LS), board_82599 },
125 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_QSFP_SF_QP), board_82599 },
126 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599EN_SFP), board_82599 },
127 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF_QP), board_82599 },
128 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T1), board_X540 },
129 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550T), board_X550},
130 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550T1), board_X550},
131 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_KX4), board_X550EM_x},
132 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_KR), board_X550EM_x},
133 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_10G_T), board_X550EM_x},
134 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_SFP), board_X550EM_x},
135 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_KR), board_x550em_a },
136 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_KR_L), board_x550em_a },
137 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SFP_N), board_x550em_a },
138 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SGMII), board_x550em_a },
139 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SGMII_L), board_x550em_a },
140 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SFP), board_x550em_a },
141 /* required last entry */
142 {0, }
143 };
144 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
145
146 #ifdef CONFIG_IXGBE_DCA
147 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
148 void *p);
149 static struct notifier_block dca_notifier = {
150 .notifier_call = ixgbe_notify_dca,
151 .next = NULL,
152 .priority = 0
153 };
154 #endif
155
156 #ifdef CONFIG_PCI_IOV
157 static unsigned int max_vfs;
158 module_param(max_vfs, uint, 0);
159 MODULE_PARM_DESC(max_vfs,
160 "Maximum number of virtual functions to allocate per physical function - default is zero and maximum value is 63. (Deprecated)");
161 #endif /* CONFIG_PCI_IOV */
162
163 static unsigned int allow_unsupported_sfp;
164 module_param(allow_unsupported_sfp, uint, 0);
165 MODULE_PARM_DESC(allow_unsupported_sfp,
166 "Allow unsupported and untested SFP+ modules on 82599-based adapters");
167
168 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
169 static int debug = -1;
170 module_param(debug, int, 0);
171 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
172
173 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
174 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
175 MODULE_LICENSE("GPL");
176 MODULE_VERSION(DRV_VERSION);
177
178 static struct workqueue_struct *ixgbe_wq;
179
180 static bool ixgbe_check_cfg_remove(struct ixgbe_hw *hw, struct pci_dev *pdev);
181
182 static int ixgbe_read_pci_cfg_word_parent(struct ixgbe_adapter *adapter,
183 u32 reg, u16 *value)
184 {
185 struct pci_dev *parent_dev;
186 struct pci_bus *parent_bus;
187
188 parent_bus = adapter->pdev->bus->parent;
189 if (!parent_bus)
190 return -1;
191
192 parent_dev = parent_bus->self;
193 if (!parent_dev)
194 return -1;
195
196 if (!pci_is_pcie(parent_dev))
197 return -1;
198
199 pcie_capability_read_word(parent_dev, reg, value);
200 if (*value == IXGBE_FAILED_READ_CFG_WORD &&
201 ixgbe_check_cfg_remove(&adapter->hw, parent_dev))
202 return -1;
203 return 0;
204 }
205
206 static s32 ixgbe_get_parent_bus_info(struct ixgbe_adapter *adapter)
207 {
208 struct ixgbe_hw *hw = &adapter->hw;
209 u16 link_status = 0;
210 int err;
211
212 hw->bus.type = ixgbe_bus_type_pci_express;
213
214 /* Get the negotiated link width and speed from PCI config space of the
215 * parent, as this device is behind a switch
216 */
217 err = ixgbe_read_pci_cfg_word_parent(adapter, 18, &link_status);
218
219 /* assume caller will handle error case */
220 if (err)
221 return err;
222
223 hw->bus.width = ixgbe_convert_bus_width(link_status);
224 hw->bus.speed = ixgbe_convert_bus_speed(link_status);
225
226 return 0;
227 }
228
229 /**
230 * ixgbe_check_from_parent - Determine whether PCIe info should come from parent
231 * @hw: hw specific details
232 *
233 * This function is used by probe to determine whether a device's PCI-Express
234 * bandwidth details should be gathered from the parent bus instead of from the
235 * device. Used to ensure that various locations all have the correct device ID
236 * checks.
237 */
238 static inline bool ixgbe_pcie_from_parent(struct ixgbe_hw *hw)
239 {
240 switch (hw->device_id) {
241 case IXGBE_DEV_ID_82599_SFP_SF_QP:
242 case IXGBE_DEV_ID_82599_QSFP_SF_QP:
243 return true;
244 default:
245 return false;
246 }
247 }
248
249 static void ixgbe_check_minimum_link(struct ixgbe_adapter *adapter,
250 int expected_gts)
251 {
252 struct ixgbe_hw *hw = &adapter->hw;
253 int max_gts = 0;
254 enum pci_bus_speed speed = PCI_SPEED_UNKNOWN;
255 enum pcie_link_width width = PCIE_LNK_WIDTH_UNKNOWN;
256 struct pci_dev *pdev;
257
258 /* Some devices are not connected over PCIe and thus do not negotiate
259 * speed. These devices do not have valid bus info, and thus any report
260 * we generate may not be correct.
261 */
262 if (hw->bus.type == ixgbe_bus_type_internal)
263 return;
264
265 /* determine whether to use the parent device */
266 if (ixgbe_pcie_from_parent(&adapter->hw))
267 pdev = adapter->pdev->bus->parent->self;
268 else
269 pdev = adapter->pdev;
270
271 if (pcie_get_minimum_link(pdev, &speed, &width) ||
272 speed == PCI_SPEED_UNKNOWN || width == PCIE_LNK_WIDTH_UNKNOWN) {
273 e_dev_warn("Unable to determine PCI Express bandwidth.\n");
274 return;
275 }
276
277 switch (speed) {
278 case PCIE_SPEED_2_5GT:
279 /* 8b/10b encoding reduces max throughput by 20% */
280 max_gts = 2 * width;
281 break;
282 case PCIE_SPEED_5_0GT:
283 /* 8b/10b encoding reduces max throughput by 20% */
284 max_gts = 4 * width;
285 break;
286 case PCIE_SPEED_8_0GT:
287 /* 128b/130b encoding reduces throughput by less than 2% */
288 max_gts = 8 * width;
289 break;
290 default:
291 e_dev_warn("Unable to determine PCI Express bandwidth.\n");
292 return;
293 }
294
295 e_dev_info("PCI Express bandwidth of %dGT/s available\n",
296 max_gts);
297 e_dev_info("(Speed:%s, Width: x%d, Encoding Loss:%s)\n",
298 (speed == PCIE_SPEED_8_0GT ? "8.0GT/s" :
299 speed == PCIE_SPEED_5_0GT ? "5.0GT/s" :
300 speed == PCIE_SPEED_2_5GT ? "2.5GT/s" :
301 "Unknown"),
302 width,
303 (speed == PCIE_SPEED_2_5GT ? "20%" :
304 speed == PCIE_SPEED_5_0GT ? "20%" :
305 speed == PCIE_SPEED_8_0GT ? "<2%" :
306 "Unknown"));
307
308 if (max_gts < expected_gts) {
309 e_dev_warn("This is not sufficient for optimal performance of this card.\n");
310 e_dev_warn("For optimal performance, at least %dGT/s of bandwidth is required.\n",
311 expected_gts);
312 e_dev_warn("A slot with more lanes and/or higher speed is suggested.\n");
313 }
314 }
315
316 static void ixgbe_service_event_schedule(struct ixgbe_adapter *adapter)
317 {
318 if (!test_bit(__IXGBE_DOWN, &adapter->state) &&
319 !test_bit(__IXGBE_REMOVING, &adapter->state) &&
320 !test_and_set_bit(__IXGBE_SERVICE_SCHED, &adapter->state))
321 queue_work(ixgbe_wq, &adapter->service_task);
322 }
323
324 static void ixgbe_remove_adapter(struct ixgbe_hw *hw)
325 {
326 struct ixgbe_adapter *adapter = hw->back;
327
328 if (!hw->hw_addr)
329 return;
330 hw->hw_addr = NULL;
331 e_dev_err("Adapter removed\n");
332 if (test_bit(__IXGBE_SERVICE_INITED, &adapter->state))
333 ixgbe_service_event_schedule(adapter);
334 }
335
336 static void ixgbe_check_remove(struct ixgbe_hw *hw, u32 reg)
337 {
338 u32 value;
339
340 /* The following check not only optimizes a bit by not
341 * performing a read on the status register when the
342 * register just read was a status register read that
343 * returned IXGBE_FAILED_READ_REG. It also blocks any
344 * potential recursion.
345 */
346 if (reg == IXGBE_STATUS) {
347 ixgbe_remove_adapter(hw);
348 return;
349 }
350 value = ixgbe_read_reg(hw, IXGBE_STATUS);
351 if (value == IXGBE_FAILED_READ_REG)
352 ixgbe_remove_adapter(hw);
353 }
354
355 /**
356 * ixgbe_read_reg - Read from device register
357 * @hw: hw specific details
358 * @reg: offset of register to read
359 *
360 * Returns : value read or IXGBE_FAILED_READ_REG if removed
361 *
362 * This function is used to read device registers. It checks for device
363 * removal by confirming any read that returns all ones by checking the
364 * status register value for all ones. This function avoids reading from
365 * the hardware if a removal was previously detected in which case it
366 * returns IXGBE_FAILED_READ_REG (all ones).
367 */
368 u32 ixgbe_read_reg(struct ixgbe_hw *hw, u32 reg)
369 {
370 u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr);
371 u32 value;
372
373 if (ixgbe_removed(reg_addr))
374 return IXGBE_FAILED_READ_REG;
375 if (unlikely(hw->phy.nw_mng_if_sel &
376 IXGBE_NW_MNG_IF_SEL_ENABLE_10_100M)) {
377 struct ixgbe_adapter *adapter;
378 int i;
379
380 for (i = 0; i < 200; ++i) {
381 value = readl(reg_addr + IXGBE_MAC_SGMII_BUSY);
382 if (likely(!value))
383 goto writes_completed;
384 if (value == IXGBE_FAILED_READ_REG) {
385 ixgbe_remove_adapter(hw);
386 return IXGBE_FAILED_READ_REG;
387 }
388 udelay(5);
389 }
390
391 adapter = hw->back;
392 e_warn(hw, "register writes incomplete %08x\n", value);
393 }
394
395 writes_completed:
396 value = readl(reg_addr + reg);
397 if (unlikely(value == IXGBE_FAILED_READ_REG))
398 ixgbe_check_remove(hw, reg);
399 return value;
400 }
401
402 static bool ixgbe_check_cfg_remove(struct ixgbe_hw *hw, struct pci_dev *pdev)
403 {
404 u16 value;
405
406 pci_read_config_word(pdev, PCI_VENDOR_ID, &value);
407 if (value == IXGBE_FAILED_READ_CFG_WORD) {
408 ixgbe_remove_adapter(hw);
409 return true;
410 }
411 return false;
412 }
413
414 u16 ixgbe_read_pci_cfg_word(struct ixgbe_hw *hw, u32 reg)
415 {
416 struct ixgbe_adapter *adapter = hw->back;
417 u16 value;
418
419 if (ixgbe_removed(hw->hw_addr))
420 return IXGBE_FAILED_READ_CFG_WORD;
421 pci_read_config_word(adapter->pdev, reg, &value);
422 if (value == IXGBE_FAILED_READ_CFG_WORD &&
423 ixgbe_check_cfg_remove(hw, adapter->pdev))
424 return IXGBE_FAILED_READ_CFG_WORD;
425 return value;
426 }
427
428 #ifdef CONFIG_PCI_IOV
429 static u32 ixgbe_read_pci_cfg_dword(struct ixgbe_hw *hw, u32 reg)
430 {
431 struct ixgbe_adapter *adapter = hw->back;
432 u32 value;
433
434 if (ixgbe_removed(hw->hw_addr))
435 return IXGBE_FAILED_READ_CFG_DWORD;
436 pci_read_config_dword(adapter->pdev, reg, &value);
437 if (value == IXGBE_FAILED_READ_CFG_DWORD &&
438 ixgbe_check_cfg_remove(hw, adapter->pdev))
439 return IXGBE_FAILED_READ_CFG_DWORD;
440 return value;
441 }
442 #endif /* CONFIG_PCI_IOV */
443
444 void ixgbe_write_pci_cfg_word(struct ixgbe_hw *hw, u32 reg, u16 value)
445 {
446 struct ixgbe_adapter *adapter = hw->back;
447
448 if (ixgbe_removed(hw->hw_addr))
449 return;
450 pci_write_config_word(adapter->pdev, reg, value);
451 }
452
453 static void ixgbe_service_event_complete(struct ixgbe_adapter *adapter)
454 {
455 BUG_ON(!test_bit(__IXGBE_SERVICE_SCHED, &adapter->state));
456
457 /* flush memory to make sure state is correct before next watchdog */
458 smp_mb__before_atomic();
459 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
460 }
461
462 struct ixgbe_reg_info {
463 u32 ofs;
464 char *name;
465 };
466
467 static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {
468
469 /* General Registers */
470 {IXGBE_CTRL, "CTRL"},
471 {IXGBE_STATUS, "STATUS"},
472 {IXGBE_CTRL_EXT, "CTRL_EXT"},
473
474 /* Interrupt Registers */
475 {IXGBE_EICR, "EICR"},
476
477 /* RX Registers */
478 {IXGBE_SRRCTL(0), "SRRCTL"},
479 {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
480 {IXGBE_RDLEN(0), "RDLEN"},
481 {IXGBE_RDH(0), "RDH"},
482 {IXGBE_RDT(0), "RDT"},
483 {IXGBE_RXDCTL(0), "RXDCTL"},
484 {IXGBE_RDBAL(0), "RDBAL"},
485 {IXGBE_RDBAH(0), "RDBAH"},
486
487 /* TX Registers */
488 {IXGBE_TDBAL(0), "TDBAL"},
489 {IXGBE_TDBAH(0), "TDBAH"},
490 {IXGBE_TDLEN(0), "TDLEN"},
491 {IXGBE_TDH(0), "TDH"},
492 {IXGBE_TDT(0), "TDT"},
493 {IXGBE_TXDCTL(0), "TXDCTL"},
494
495 /* List Terminator */
496 { .name = NULL }
497 };
498
499
500 /*
501 * ixgbe_regdump - register printout routine
502 */
503 static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
504 {
505 int i = 0, j = 0;
506 char rname[16];
507 u32 regs[64];
508
509 switch (reginfo->ofs) {
510 case IXGBE_SRRCTL(0):
511 for (i = 0; i < 64; i++)
512 regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
513 break;
514 case IXGBE_DCA_RXCTRL(0):
515 for (i = 0; i < 64; i++)
516 regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
517 break;
518 case IXGBE_RDLEN(0):
519 for (i = 0; i < 64; i++)
520 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
521 break;
522 case IXGBE_RDH(0):
523 for (i = 0; i < 64; i++)
524 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
525 break;
526 case IXGBE_RDT(0):
527 for (i = 0; i < 64; i++)
528 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
529 break;
530 case IXGBE_RXDCTL(0):
531 for (i = 0; i < 64; i++)
532 regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
533 break;
534 case IXGBE_RDBAL(0):
535 for (i = 0; i < 64; i++)
536 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
537 break;
538 case IXGBE_RDBAH(0):
539 for (i = 0; i < 64; i++)
540 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
541 break;
542 case IXGBE_TDBAL(0):
543 for (i = 0; i < 64; i++)
544 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
545 break;
546 case IXGBE_TDBAH(0):
547 for (i = 0; i < 64; i++)
548 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
549 break;
550 case IXGBE_TDLEN(0):
551 for (i = 0; i < 64; i++)
552 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
553 break;
554 case IXGBE_TDH(0):
555 for (i = 0; i < 64; i++)
556 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
557 break;
558 case IXGBE_TDT(0):
559 for (i = 0; i < 64; i++)
560 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
561 break;
562 case IXGBE_TXDCTL(0):
563 for (i = 0; i < 64; i++)
564 regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
565 break;
566 default:
567 pr_info("%-15s %08x\n", reginfo->name,
568 IXGBE_READ_REG(hw, reginfo->ofs));
569 return;
570 }
571
572 for (i = 0; i < 8; i++) {
573 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7);
574 pr_err("%-15s", rname);
575 for (j = 0; j < 8; j++)
576 pr_cont(" %08x", regs[i*8+j]);
577 pr_cont("\n");
578 }
579
580 }
581
582 /*
583 * ixgbe_dump - Print registers, tx-rings and rx-rings
584 */
585 static void ixgbe_dump(struct ixgbe_adapter *adapter)
586 {
587 struct net_device *netdev = adapter->netdev;
588 struct ixgbe_hw *hw = &adapter->hw;
589 struct ixgbe_reg_info *reginfo;
590 int n = 0;
591 struct ixgbe_ring *tx_ring;
592 struct ixgbe_tx_buffer *tx_buffer;
593 union ixgbe_adv_tx_desc *tx_desc;
594 struct my_u0 { u64 a; u64 b; } *u0;
595 struct ixgbe_ring *rx_ring;
596 union ixgbe_adv_rx_desc *rx_desc;
597 struct ixgbe_rx_buffer *rx_buffer_info;
598 u32 staterr;
599 int i = 0;
600
601 if (!netif_msg_hw(adapter))
602 return;
603
604 /* Print netdevice Info */
605 if (netdev) {
606 dev_info(&adapter->pdev->dev, "Net device Info\n");
607 pr_info("Device Name state "
608 "trans_start last_rx\n");
609 pr_info("%-15s %016lX %016lX %016lX\n",
610 netdev->name,
611 netdev->state,
612 netdev->trans_start,
613 netdev->last_rx);
614 }
615
616 /* Print Registers */
617 dev_info(&adapter->pdev->dev, "Register Dump\n");
618 pr_info(" Register Name Value\n");
619 for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
620 reginfo->name; reginfo++) {
621 ixgbe_regdump(hw, reginfo);
622 }
623
624 /* Print TX Ring Summary */
625 if (!netdev || !netif_running(netdev))
626 return;
627
628 dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
629 pr_info(" %s %s %s %s\n",
630 "Queue [NTU] [NTC] [bi(ntc)->dma ]",
631 "leng", "ntw", "timestamp");
632 for (n = 0; n < adapter->num_tx_queues; n++) {
633 tx_ring = adapter->tx_ring[n];
634 tx_buffer = &tx_ring->tx_buffer_info[tx_ring->next_to_clean];
635 pr_info(" %5d %5X %5X %016llX %08X %p %016llX\n",
636 n, tx_ring->next_to_use, tx_ring->next_to_clean,
637 (u64)dma_unmap_addr(tx_buffer, dma),
638 dma_unmap_len(tx_buffer, len),
639 tx_buffer->next_to_watch,
640 (u64)tx_buffer->time_stamp);
641 }
642
643 /* Print TX Rings */
644 if (!netif_msg_tx_done(adapter))
645 goto rx_ring_summary;
646
647 dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
648
649 /* Transmit Descriptor Formats
650 *
651 * 82598 Advanced Transmit Descriptor
652 * +--------------------------------------------------------------+
653 * 0 | Buffer Address [63:0] |
654 * +--------------------------------------------------------------+
655 * 8 | PAYLEN | POPTS | IDX | STA | DCMD |DTYP | RSV | DTALEN |
656 * +--------------------------------------------------------------+
657 * 63 46 45 40 39 36 35 32 31 24 23 20 19 0
658 *
659 * 82598 Advanced Transmit Descriptor (Write-Back Format)
660 * +--------------------------------------------------------------+
661 * 0 | RSV [63:0] |
662 * +--------------------------------------------------------------+
663 * 8 | RSV | STA | NXTSEQ |
664 * +--------------------------------------------------------------+
665 * 63 36 35 32 31 0
666 *
667 * 82599+ Advanced Transmit Descriptor
668 * +--------------------------------------------------------------+
669 * 0 | Buffer Address [63:0] |
670 * +--------------------------------------------------------------+
671 * 8 |PAYLEN |POPTS|CC|IDX |STA |DCMD |DTYP |MAC |RSV |DTALEN |
672 * +--------------------------------------------------------------+
673 * 63 46 45 40 39 38 36 35 32 31 24 23 20 19 18 17 16 15 0
674 *
675 * 82599+ Advanced Transmit Descriptor (Write-Back Format)
676 * +--------------------------------------------------------------+
677 * 0 | RSV [63:0] |
678 * +--------------------------------------------------------------+
679 * 8 | RSV | STA | RSV |
680 * +--------------------------------------------------------------+
681 * 63 36 35 32 31 0
682 */
683
684 for (n = 0; n < adapter->num_tx_queues; n++) {
685 tx_ring = adapter->tx_ring[n];
686 pr_info("------------------------------------\n");
687 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index);
688 pr_info("------------------------------------\n");
689 pr_info("%s%s %s %s %s %s\n",
690 "T [desc] [address 63:0 ] ",
691 "[PlPOIdStDDt Ln] [bi->dma ] ",
692 "leng", "ntw", "timestamp", "bi->skb");
693
694 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
695 tx_desc = IXGBE_TX_DESC(tx_ring, i);
696 tx_buffer = &tx_ring->tx_buffer_info[i];
697 u0 = (struct my_u0 *)tx_desc;
698 if (dma_unmap_len(tx_buffer, len) > 0) {
699 pr_info("T [0x%03X] %016llX %016llX %016llX %08X %p %016llX %p",
700 i,
701 le64_to_cpu(u0->a),
702 le64_to_cpu(u0->b),
703 (u64)dma_unmap_addr(tx_buffer, dma),
704 dma_unmap_len(tx_buffer, len),
705 tx_buffer->next_to_watch,
706 (u64)tx_buffer->time_stamp,
707 tx_buffer->skb);
708 if (i == tx_ring->next_to_use &&
709 i == tx_ring->next_to_clean)
710 pr_cont(" NTC/U\n");
711 else if (i == tx_ring->next_to_use)
712 pr_cont(" NTU\n");
713 else if (i == tx_ring->next_to_clean)
714 pr_cont(" NTC\n");
715 else
716 pr_cont("\n");
717
718 if (netif_msg_pktdata(adapter) &&
719 tx_buffer->skb)
720 print_hex_dump(KERN_INFO, "",
721 DUMP_PREFIX_ADDRESS, 16, 1,
722 tx_buffer->skb->data,
723 dma_unmap_len(tx_buffer, len),
724 true);
725 }
726 }
727 }
728
729 /* Print RX Rings Summary */
730 rx_ring_summary:
731 dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
732 pr_info("Queue [NTU] [NTC]\n");
733 for (n = 0; n < adapter->num_rx_queues; n++) {
734 rx_ring = adapter->rx_ring[n];
735 pr_info("%5d %5X %5X\n",
736 n, rx_ring->next_to_use, rx_ring->next_to_clean);
737 }
738
739 /* Print RX Rings */
740 if (!netif_msg_rx_status(adapter))
741 return;
742
743 dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
744
745 /* Receive Descriptor Formats
746 *
747 * 82598 Advanced Receive Descriptor (Read) Format
748 * 63 1 0
749 * +-----------------------------------------------------+
750 * 0 | Packet Buffer Address [63:1] |A0/NSE|
751 * +----------------------------------------------+------+
752 * 8 | Header Buffer Address [63:1] | DD |
753 * +-----------------------------------------------------+
754 *
755 *
756 * 82598 Advanced Receive Descriptor (Write-Back) Format
757 *
758 * 63 48 47 32 31 30 21 20 16 15 4 3 0
759 * +------------------------------------------------------+
760 * 0 | RSS Hash / |SPH| HDR_LEN | RSV |Packet| RSS |
761 * | Packet | IP | | | | Type | Type |
762 * | Checksum | Ident | | | | | |
763 * +------------------------------------------------------+
764 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
765 * +------------------------------------------------------+
766 * 63 48 47 32 31 20 19 0
767 *
768 * 82599+ Advanced Receive Descriptor (Read) Format
769 * 63 1 0
770 * +-----------------------------------------------------+
771 * 0 | Packet Buffer Address [63:1] |A0/NSE|
772 * +----------------------------------------------+------+
773 * 8 | Header Buffer Address [63:1] | DD |
774 * +-----------------------------------------------------+
775 *
776 *
777 * 82599+ Advanced Receive Descriptor (Write-Back) Format
778 *
779 * 63 48 47 32 31 30 21 20 17 16 4 3 0
780 * +------------------------------------------------------+
781 * 0 |RSS / Frag Checksum|SPH| HDR_LEN |RSC- |Packet| RSS |
782 * |/ RTT / PCoE_PARAM | | | CNT | Type | Type |
783 * |/ Flow Dir Flt ID | | | | | |
784 * +------------------------------------------------------+
785 * 8 | VLAN Tag | Length |Extended Error| Xtnd Status/NEXTP |
786 * +------------------------------------------------------+
787 * 63 48 47 32 31 20 19 0
788 */
789
790 for (n = 0; n < adapter->num_rx_queues; n++) {
791 rx_ring = adapter->rx_ring[n];
792 pr_info("------------------------------------\n");
793 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index);
794 pr_info("------------------------------------\n");
795 pr_info("%s%s%s",
796 "R [desc] [ PktBuf A0] ",
797 "[ HeadBuf DD] [bi->dma ] [bi->skb ] ",
798 "<-- Adv Rx Read format\n");
799 pr_info("%s%s%s",
800 "RWB[desc] [PcsmIpSHl PtRs] ",
801 "[vl er S cks ln] ---------------- [bi->skb ] ",
802 "<-- Adv Rx Write-Back format\n");
803
804 for (i = 0; i < rx_ring->count; i++) {
805 rx_buffer_info = &rx_ring->rx_buffer_info[i];
806 rx_desc = IXGBE_RX_DESC(rx_ring, i);
807 u0 = (struct my_u0 *)rx_desc;
808 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
809 if (staterr & IXGBE_RXD_STAT_DD) {
810 /* Descriptor Done */
811 pr_info("RWB[0x%03X] %016llX "
812 "%016llX ---------------- %p", i,
813 le64_to_cpu(u0->a),
814 le64_to_cpu(u0->b),
815 rx_buffer_info->skb);
816 } else {
817 pr_info("R [0x%03X] %016llX "
818 "%016llX %016llX %p", i,
819 le64_to_cpu(u0->a),
820 le64_to_cpu(u0->b),
821 (u64)rx_buffer_info->dma,
822 rx_buffer_info->skb);
823
824 if (netif_msg_pktdata(adapter) &&
825 rx_buffer_info->dma) {
826 print_hex_dump(KERN_INFO, "",
827 DUMP_PREFIX_ADDRESS, 16, 1,
828 page_address(rx_buffer_info->page) +
829 rx_buffer_info->page_offset,
830 ixgbe_rx_bufsz(rx_ring), true);
831 }
832 }
833
834 if (i == rx_ring->next_to_use)
835 pr_cont(" NTU\n");
836 else if (i == rx_ring->next_to_clean)
837 pr_cont(" NTC\n");
838 else
839 pr_cont("\n");
840
841 }
842 }
843 }
844
845 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
846 {
847 u32 ctrl_ext;
848
849 /* Let firmware take over control of h/w */
850 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
851 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
852 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
853 }
854
855 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
856 {
857 u32 ctrl_ext;
858
859 /* Let firmware know the driver has taken over */
860 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
861 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
862 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
863 }
864
865 /**
866 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
867 * @adapter: pointer to adapter struct
868 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
869 * @queue: queue to map the corresponding interrupt to
870 * @msix_vector: the vector to map to the corresponding queue
871 *
872 */
873 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
874 u8 queue, u8 msix_vector)
875 {
876 u32 ivar, index;
877 struct ixgbe_hw *hw = &adapter->hw;
878 switch (hw->mac.type) {
879 case ixgbe_mac_82598EB:
880 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
881 if (direction == -1)
882 direction = 0;
883 index = (((direction * 64) + queue) >> 2) & 0x1F;
884 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
885 ivar &= ~(0xFF << (8 * (queue & 0x3)));
886 ivar |= (msix_vector << (8 * (queue & 0x3)));
887 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
888 break;
889 case ixgbe_mac_82599EB:
890 case ixgbe_mac_X540:
891 case ixgbe_mac_X550:
892 case ixgbe_mac_X550EM_x:
893 case ixgbe_mac_x550em_a:
894 if (direction == -1) {
895 /* other causes */
896 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
897 index = ((queue & 1) * 8);
898 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
899 ivar &= ~(0xFF << index);
900 ivar |= (msix_vector << index);
901 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
902 break;
903 } else {
904 /* tx or rx causes */
905 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
906 index = ((16 * (queue & 1)) + (8 * direction));
907 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
908 ivar &= ~(0xFF << index);
909 ivar |= (msix_vector << index);
910 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
911 break;
912 }
913 default:
914 break;
915 }
916 }
917
918 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
919 u64 qmask)
920 {
921 u32 mask;
922
923 switch (adapter->hw.mac.type) {
924 case ixgbe_mac_82598EB:
925 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
926 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
927 break;
928 case ixgbe_mac_82599EB:
929 case ixgbe_mac_X540:
930 case ixgbe_mac_X550:
931 case ixgbe_mac_X550EM_x:
932 case ixgbe_mac_x550em_a:
933 mask = (qmask & 0xFFFFFFFF);
934 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
935 mask = (qmask >> 32);
936 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
937 break;
938 default:
939 break;
940 }
941 }
942
943 void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *ring,
944 struct ixgbe_tx_buffer *tx_buffer)
945 {
946 if (tx_buffer->skb) {
947 dev_kfree_skb_any(tx_buffer->skb);
948 if (dma_unmap_len(tx_buffer, len))
949 dma_unmap_single(ring->dev,
950 dma_unmap_addr(tx_buffer, dma),
951 dma_unmap_len(tx_buffer, len),
952 DMA_TO_DEVICE);
953 } else if (dma_unmap_len(tx_buffer, len)) {
954 dma_unmap_page(ring->dev,
955 dma_unmap_addr(tx_buffer, dma),
956 dma_unmap_len(tx_buffer, len),
957 DMA_TO_DEVICE);
958 }
959 tx_buffer->next_to_watch = NULL;
960 tx_buffer->skb = NULL;
961 dma_unmap_len_set(tx_buffer, len, 0);
962 /* tx_buffer must be completely set up in the transmit path */
963 }
964
965 static void ixgbe_update_xoff_rx_lfc(struct ixgbe_adapter *adapter)
966 {
967 struct ixgbe_hw *hw = &adapter->hw;
968 struct ixgbe_hw_stats *hwstats = &adapter->stats;
969 int i;
970 u32 data;
971
972 if ((hw->fc.current_mode != ixgbe_fc_full) &&
973 (hw->fc.current_mode != ixgbe_fc_rx_pause))
974 return;
975
976 switch (hw->mac.type) {
977 case ixgbe_mac_82598EB:
978 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
979 break;
980 default:
981 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
982 }
983 hwstats->lxoffrxc += data;
984
985 /* refill credits (no tx hang) if we received xoff */
986 if (!data)
987 return;
988
989 for (i = 0; i < adapter->num_tx_queues; i++)
990 clear_bit(__IXGBE_HANG_CHECK_ARMED,
991 &adapter->tx_ring[i]->state);
992 }
993
994 static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter)
995 {
996 struct ixgbe_hw *hw = &adapter->hw;
997 struct ixgbe_hw_stats *hwstats = &adapter->stats;
998 u32 xoff[8] = {0};
999 u8 tc;
1000 int i;
1001 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
1002
1003 if (adapter->ixgbe_ieee_pfc)
1004 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
1005
1006 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED) || !pfc_en) {
1007 ixgbe_update_xoff_rx_lfc(adapter);
1008 return;
1009 }
1010
1011 /* update stats for each tc, only valid with PFC enabled */
1012 for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) {
1013 u32 pxoffrxc;
1014
1015 switch (hw->mac.type) {
1016 case ixgbe_mac_82598EB:
1017 pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
1018 break;
1019 default:
1020 pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
1021 }
1022 hwstats->pxoffrxc[i] += pxoffrxc;
1023 /* Get the TC for given UP */
1024 tc = netdev_get_prio_tc_map(adapter->netdev, i);
1025 xoff[tc] += pxoffrxc;
1026 }
1027
1028 /* disarm tx queues that have received xoff frames */
1029 for (i = 0; i < adapter->num_tx_queues; i++) {
1030 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
1031
1032 tc = tx_ring->dcb_tc;
1033 if (xoff[tc])
1034 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
1035 }
1036 }
1037
1038 static u64 ixgbe_get_tx_completed(struct ixgbe_ring *ring)
1039 {
1040 return ring->stats.packets;
1041 }
1042
1043 static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring)
1044 {
1045 struct ixgbe_adapter *adapter;
1046 struct ixgbe_hw *hw;
1047 u32 head, tail;
1048
1049 if (ring->l2_accel_priv)
1050 adapter = ring->l2_accel_priv->real_adapter;
1051 else
1052 adapter = netdev_priv(ring->netdev);
1053
1054 hw = &adapter->hw;
1055 head = IXGBE_READ_REG(hw, IXGBE_TDH(ring->reg_idx));
1056 tail = IXGBE_READ_REG(hw, IXGBE_TDT(ring->reg_idx));
1057
1058 if (head != tail)
1059 return (head < tail) ?
1060 tail - head : (tail + ring->count - head);
1061
1062 return 0;
1063 }
1064
1065 static inline bool ixgbe_check_tx_hang(struct ixgbe_ring *tx_ring)
1066 {
1067 u32 tx_done = ixgbe_get_tx_completed(tx_ring);
1068 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
1069 u32 tx_pending = ixgbe_get_tx_pending(tx_ring);
1070
1071 clear_check_for_tx_hang(tx_ring);
1072
1073 /*
1074 * Check for a hung queue, but be thorough. This verifies
1075 * that a transmit has been completed since the previous
1076 * check AND there is at least one packet pending. The
1077 * ARMED bit is set to indicate a potential hang. The
1078 * bit is cleared if a pause frame is received to remove
1079 * false hang detection due to PFC or 802.3x frames. By
1080 * requiring this to fail twice we avoid races with
1081 * pfc clearing the ARMED bit and conditions where we
1082 * run the check_tx_hang logic with a transmit completion
1083 * pending but without time to complete it yet.
1084 */
1085 if (tx_done_old == tx_done && tx_pending)
1086 /* make sure it is true for two checks in a row */
1087 return test_and_set_bit(__IXGBE_HANG_CHECK_ARMED,
1088 &tx_ring->state);
1089 /* update completed stats and continue */
1090 tx_ring->tx_stats.tx_done_old = tx_done;
1091 /* reset the countdown */
1092 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
1093
1094 return false;
1095 }
1096
1097 /**
1098 * ixgbe_tx_timeout_reset - initiate reset due to Tx timeout
1099 * @adapter: driver private struct
1100 **/
1101 static void ixgbe_tx_timeout_reset(struct ixgbe_adapter *adapter)
1102 {
1103
1104 /* Do the reset outside of interrupt context */
1105 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1106 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
1107 e_warn(drv, "initiating reset due to tx timeout\n");
1108 ixgbe_service_event_schedule(adapter);
1109 }
1110 }
1111
1112 /**
1113 * ixgbe_tx_maxrate - callback to set the maximum per-queue bitrate
1114 **/
1115 static int ixgbe_tx_maxrate(struct net_device *netdev,
1116 int queue_index, u32 maxrate)
1117 {
1118 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1119 struct ixgbe_hw *hw = &adapter->hw;
1120 u32 bcnrc_val = ixgbe_link_mbps(adapter);
1121
1122 if (!maxrate)
1123 return 0;
1124
1125 /* Calculate the rate factor values to set */
1126 bcnrc_val <<= IXGBE_RTTBCNRC_RF_INT_SHIFT;
1127 bcnrc_val /= maxrate;
1128
1129 /* clear everything but the rate factor */
1130 bcnrc_val &= IXGBE_RTTBCNRC_RF_INT_MASK |
1131 IXGBE_RTTBCNRC_RF_DEC_MASK;
1132
1133 /* enable the rate scheduler */
1134 bcnrc_val |= IXGBE_RTTBCNRC_RS_ENA;
1135
1136 IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, queue_index);
1137 IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRC, bcnrc_val);
1138
1139 return 0;
1140 }
1141
1142 /**
1143 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
1144 * @q_vector: structure containing interrupt and ring information
1145 * @tx_ring: tx ring to clean
1146 * @napi_budget: Used to determine if we are in netpoll
1147 **/
1148 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
1149 struct ixgbe_ring *tx_ring, int napi_budget)
1150 {
1151 struct ixgbe_adapter *adapter = q_vector->adapter;
1152 struct ixgbe_tx_buffer *tx_buffer;
1153 union ixgbe_adv_tx_desc *tx_desc;
1154 unsigned int total_bytes = 0, total_packets = 0;
1155 unsigned int budget = q_vector->tx.work_limit;
1156 unsigned int i = tx_ring->next_to_clean;
1157
1158 if (test_bit(__IXGBE_DOWN, &adapter->state))
1159 return true;
1160
1161 tx_buffer = &tx_ring->tx_buffer_info[i];
1162 tx_desc = IXGBE_TX_DESC(tx_ring, i);
1163 i -= tx_ring->count;
1164
1165 do {
1166 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
1167
1168 /* if next_to_watch is not set then there is no work pending */
1169 if (!eop_desc)
1170 break;
1171
1172 /* prevent any other reads prior to eop_desc */
1173 read_barrier_depends();
1174
1175 /* if DD is not set pending work has not been completed */
1176 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
1177 break;
1178
1179 /* clear next_to_watch to prevent false hangs */
1180 tx_buffer->next_to_watch = NULL;
1181
1182 /* update the statistics for this packet */
1183 total_bytes += tx_buffer->bytecount;
1184 total_packets += tx_buffer->gso_segs;
1185
1186 /* free the skb */
1187 napi_consume_skb(tx_buffer->skb, napi_budget);
1188
1189 /* unmap skb header data */
1190 dma_unmap_single(tx_ring->dev,
1191 dma_unmap_addr(tx_buffer, dma),
1192 dma_unmap_len(tx_buffer, len),
1193 DMA_TO_DEVICE);
1194
1195 /* clear tx_buffer data */
1196 tx_buffer->skb = NULL;
1197 dma_unmap_len_set(tx_buffer, len, 0);
1198
1199 /* unmap remaining buffers */
1200 while (tx_desc != eop_desc) {
1201 tx_buffer++;
1202 tx_desc++;
1203 i++;
1204 if (unlikely(!i)) {
1205 i -= tx_ring->count;
1206 tx_buffer = tx_ring->tx_buffer_info;
1207 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
1208 }
1209
1210 /* unmap any remaining paged data */
1211 if (dma_unmap_len(tx_buffer, len)) {
1212 dma_unmap_page(tx_ring->dev,
1213 dma_unmap_addr(tx_buffer, dma),
1214 dma_unmap_len(tx_buffer, len),
1215 DMA_TO_DEVICE);
1216 dma_unmap_len_set(tx_buffer, len, 0);
1217 }
1218 }
1219
1220 /* move us one more past the eop_desc for start of next pkt */
1221 tx_buffer++;
1222 tx_desc++;
1223 i++;
1224 if (unlikely(!i)) {
1225 i -= tx_ring->count;
1226 tx_buffer = tx_ring->tx_buffer_info;
1227 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
1228 }
1229
1230 /* issue prefetch for next Tx descriptor */
1231 prefetch(tx_desc);
1232
1233 /* update budget accounting */
1234 budget--;
1235 } while (likely(budget));
1236
1237 i += tx_ring->count;
1238 tx_ring->next_to_clean = i;
1239 u64_stats_update_begin(&tx_ring->syncp);
1240 tx_ring->stats.bytes += total_bytes;
1241 tx_ring->stats.packets += total_packets;
1242 u64_stats_update_end(&tx_ring->syncp);
1243 q_vector->tx.total_bytes += total_bytes;
1244 q_vector->tx.total_packets += total_packets;
1245
1246 if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring)) {
1247 /* schedule immediate reset if we believe we hung */
1248 struct ixgbe_hw *hw = &adapter->hw;
1249 e_err(drv, "Detected Tx Unit Hang\n"
1250 " Tx Queue <%d>\n"
1251 " TDH, TDT <%x>, <%x>\n"
1252 " next_to_use <%x>\n"
1253 " next_to_clean <%x>\n"
1254 "tx_buffer_info[next_to_clean]\n"
1255 " time_stamp <%lx>\n"
1256 " jiffies <%lx>\n",
1257 tx_ring->queue_index,
1258 IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)),
1259 IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)),
1260 tx_ring->next_to_use, i,
1261 tx_ring->tx_buffer_info[i].time_stamp, jiffies);
1262
1263 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
1264
1265 e_info(probe,
1266 "tx hang %d detected on queue %d, resetting adapter\n",
1267 adapter->tx_timeout_count + 1, tx_ring->queue_index);
1268
1269 /* schedule immediate reset if we believe we hung */
1270 ixgbe_tx_timeout_reset(adapter);
1271
1272 /* the adapter is about to reset, no point in enabling stuff */
1273 return true;
1274 }
1275
1276 netdev_tx_completed_queue(txring_txq(tx_ring),
1277 total_packets, total_bytes);
1278
1279 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
1280 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
1281 (ixgbe_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
1282 /* Make sure that anybody stopping the queue after this
1283 * sees the new next_to_clean.
1284 */
1285 smp_mb();
1286 if (__netif_subqueue_stopped(tx_ring->netdev,
1287 tx_ring->queue_index)
1288 && !test_bit(__IXGBE_DOWN, &adapter->state)) {
1289 netif_wake_subqueue(tx_ring->netdev,
1290 tx_ring->queue_index);
1291 ++tx_ring->tx_stats.restart_queue;
1292 }
1293 }
1294
1295 return !!budget;
1296 }
1297
1298 #ifdef CONFIG_IXGBE_DCA
1299 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
1300 struct ixgbe_ring *tx_ring,
1301 int cpu)
1302 {
1303 struct ixgbe_hw *hw = &adapter->hw;
1304 u32 txctrl = 0;
1305 u16 reg_offset;
1306
1307 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1308 txctrl = dca3_get_tag(tx_ring->dev, cpu);
1309
1310 switch (hw->mac.type) {
1311 case ixgbe_mac_82598EB:
1312 reg_offset = IXGBE_DCA_TXCTRL(tx_ring->reg_idx);
1313 break;
1314 case ixgbe_mac_82599EB:
1315 case ixgbe_mac_X540:
1316 reg_offset = IXGBE_DCA_TXCTRL_82599(tx_ring->reg_idx);
1317 txctrl <<= IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599;
1318 break;
1319 default:
1320 /* for unknown hardware do not write register */
1321 return;
1322 }
1323
1324 /*
1325 * We can enable relaxed ordering for reads, but not writes when
1326 * DCA is enabled. This is due to a known issue in some chipsets
1327 * which will cause the DCA tag to be cleared.
1328 */
1329 txctrl |= IXGBE_DCA_TXCTRL_DESC_RRO_EN |
1330 IXGBE_DCA_TXCTRL_DATA_RRO_EN |
1331 IXGBE_DCA_TXCTRL_DESC_DCA_EN;
1332
1333 IXGBE_WRITE_REG(hw, reg_offset, txctrl);
1334 }
1335
1336 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
1337 struct ixgbe_ring *rx_ring,
1338 int cpu)
1339 {
1340 struct ixgbe_hw *hw = &adapter->hw;
1341 u32 rxctrl = 0;
1342 u8 reg_idx = rx_ring->reg_idx;
1343
1344 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1345 rxctrl = dca3_get_tag(rx_ring->dev, cpu);
1346
1347 switch (hw->mac.type) {
1348 case ixgbe_mac_82599EB:
1349 case ixgbe_mac_X540:
1350 rxctrl <<= IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599;
1351 break;
1352 default:
1353 break;
1354 }
1355
1356 /*
1357 * We can enable relaxed ordering for reads, but not writes when
1358 * DCA is enabled. This is due to a known issue in some chipsets
1359 * which will cause the DCA tag to be cleared.
1360 */
1361 rxctrl |= IXGBE_DCA_RXCTRL_DESC_RRO_EN |
1362 IXGBE_DCA_RXCTRL_DATA_DCA_EN |
1363 IXGBE_DCA_RXCTRL_DESC_DCA_EN;
1364
1365 IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl);
1366 }
1367
1368 static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
1369 {
1370 struct ixgbe_adapter *adapter = q_vector->adapter;
1371 struct ixgbe_ring *ring;
1372 int cpu = get_cpu();
1373
1374 if (q_vector->cpu == cpu)
1375 goto out_no_update;
1376
1377 ixgbe_for_each_ring(ring, q_vector->tx)
1378 ixgbe_update_tx_dca(adapter, ring, cpu);
1379
1380 ixgbe_for_each_ring(ring, q_vector->rx)
1381 ixgbe_update_rx_dca(adapter, ring, cpu);
1382
1383 q_vector->cpu = cpu;
1384 out_no_update:
1385 put_cpu();
1386 }
1387
1388 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
1389 {
1390 int i;
1391
1392 /* always use CB2 mode, difference is masked in the CB driver */
1393 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1394 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
1395 IXGBE_DCA_CTRL_DCA_MODE_CB2);
1396 else
1397 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
1398 IXGBE_DCA_CTRL_DCA_DISABLE);
1399
1400 for (i = 0; i < adapter->num_q_vectors; i++) {
1401 adapter->q_vector[i]->cpu = -1;
1402 ixgbe_update_dca(adapter->q_vector[i]);
1403 }
1404 }
1405
1406 static int __ixgbe_notify_dca(struct device *dev, void *data)
1407 {
1408 struct ixgbe_adapter *adapter = dev_get_drvdata(dev);
1409 unsigned long event = *(unsigned long *)data;
1410
1411 if (!(adapter->flags & IXGBE_FLAG_DCA_CAPABLE))
1412 return 0;
1413
1414 switch (event) {
1415 case DCA_PROVIDER_ADD:
1416 /* if we're already enabled, don't do it again */
1417 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1418 break;
1419 if (dca_add_requester(dev) == 0) {
1420 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
1421 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
1422 IXGBE_DCA_CTRL_DCA_MODE_CB2);
1423 break;
1424 }
1425 /* Fall Through since DCA is disabled. */
1426 case DCA_PROVIDER_REMOVE:
1427 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
1428 dca_remove_requester(dev);
1429 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
1430 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
1431 IXGBE_DCA_CTRL_DCA_DISABLE);
1432 }
1433 break;
1434 }
1435
1436 return 0;
1437 }
1438
1439 #endif /* CONFIG_IXGBE_DCA */
1440
1441 #define IXGBE_RSS_L4_TYPES_MASK \
1442 ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
1443 (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
1444 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
1445 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))
1446
1447 static inline void ixgbe_rx_hash(struct ixgbe_ring *ring,
1448 union ixgbe_adv_rx_desc *rx_desc,
1449 struct sk_buff *skb)
1450 {
1451 u16 rss_type;
1452
1453 if (!(ring->netdev->features & NETIF_F_RXHASH))
1454 return;
1455
1456 rss_type = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info) &
1457 IXGBE_RXDADV_RSSTYPE_MASK;
1458
1459 if (!rss_type)
1460 return;
1461
1462 skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),
1463 (IXGBE_RSS_L4_TYPES_MASK & (1ul << rss_type)) ?
1464 PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
1465 }
1466
1467 #ifdef IXGBE_FCOE
1468 /**
1469 * ixgbe_rx_is_fcoe - check the rx desc for incoming pkt type
1470 * @ring: structure containing ring specific data
1471 * @rx_desc: advanced rx descriptor
1472 *
1473 * Returns : true if it is FCoE pkt
1474 */
1475 static inline bool ixgbe_rx_is_fcoe(struct ixgbe_ring *ring,
1476 union ixgbe_adv_rx_desc *rx_desc)
1477 {
1478 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1479
1480 return test_bit(__IXGBE_RX_FCOE, &ring->state) &&
1481 ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_ETQF_MASK)) ==
1482 (cpu_to_le16(IXGBE_ETQF_FILTER_FCOE <<
1483 IXGBE_RXDADV_PKTTYPE_ETQF_SHIFT)));
1484 }
1485
1486 #endif /* IXGBE_FCOE */
1487 /**
1488 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
1489 * @ring: structure containing ring specific data
1490 * @rx_desc: current Rx descriptor being processed
1491 * @skb: skb currently being received and modified
1492 **/
1493 static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
1494 union ixgbe_adv_rx_desc *rx_desc,
1495 struct sk_buff *skb)
1496 {
1497 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1498 __le16 hdr_info = rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
1499 bool encap_pkt = false;
1500
1501 skb_checksum_none_assert(skb);
1502
1503 /* Rx csum disabled */
1504 if (!(ring->netdev->features & NETIF_F_RXCSUM))
1505 return;
1506
1507 if ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_VXLAN)) &&
1508 (hdr_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_TUNNEL >> 16))) {
1509 encap_pkt = true;
1510 skb->encapsulation = 1;
1511 }
1512
1513 /* if IP and error */
1514 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
1515 ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
1516 ring->rx_stats.csum_err++;
1517 return;
1518 }
1519
1520 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
1521 return;
1522
1523 if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
1524 /*
1525 * 82599 errata, UDP frames with a 0 checksum can be marked as
1526 * checksum errors.
1527 */
1528 if ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_UDP)) &&
1529 test_bit(__IXGBE_RX_CSUM_UDP_ZERO_ERR, &ring->state))
1530 return;
1531
1532 ring->rx_stats.csum_err++;
1533 return;
1534 }
1535
1536 /* It must be a TCP or UDP packet with a valid checksum */
1537 skb->ip_summed = CHECKSUM_UNNECESSARY;
1538 if (encap_pkt) {
1539 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_OUTERIPCS))
1540 return;
1541
1542 if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_OUTERIPER)) {
1543 skb->ip_summed = CHECKSUM_NONE;
1544 return;
1545 }
1546 /* If we checked the outer header let the stack know */
1547 skb->csum_level = 1;
1548 }
1549 }
1550
1551 static bool ixgbe_alloc_mapped_page(struct ixgbe_ring *rx_ring,
1552 struct ixgbe_rx_buffer *bi)
1553 {
1554 struct page *page = bi->page;
1555 dma_addr_t dma;
1556
1557 /* since we are recycling buffers we should seldom need to alloc */
1558 if (likely(page))
1559 return true;
1560
1561 /* alloc new page for storage */
1562 page = dev_alloc_pages(ixgbe_rx_pg_order(rx_ring));
1563 if (unlikely(!page)) {
1564 rx_ring->rx_stats.alloc_rx_page_failed++;
1565 return false;
1566 }
1567
1568 /* map page for use */
1569 dma = dma_map_page(rx_ring->dev, page, 0,
1570 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
1571
1572 /*
1573 * if mapping failed free memory back to system since
1574 * there isn't much point in holding memory we can't use
1575 */
1576 if (dma_mapping_error(rx_ring->dev, dma)) {
1577 __free_pages(page, ixgbe_rx_pg_order(rx_ring));
1578
1579 rx_ring->rx_stats.alloc_rx_page_failed++;
1580 return false;
1581 }
1582
1583 bi->dma = dma;
1584 bi->page = page;
1585 bi->page_offset = 0;
1586
1587 return true;
1588 }
1589
1590 /**
1591 * ixgbe_alloc_rx_buffers - Replace used receive buffers
1592 * @rx_ring: ring to place buffers on
1593 * @cleaned_count: number of buffers to replace
1594 **/
1595 void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count)
1596 {
1597 union ixgbe_adv_rx_desc *rx_desc;
1598 struct ixgbe_rx_buffer *bi;
1599 u16 i = rx_ring->next_to_use;
1600
1601 /* nothing to do */
1602 if (!cleaned_count)
1603 return;
1604
1605 rx_desc = IXGBE_RX_DESC(rx_ring, i);
1606 bi = &rx_ring->rx_buffer_info[i];
1607 i -= rx_ring->count;
1608
1609 do {
1610 if (!ixgbe_alloc_mapped_page(rx_ring, bi))
1611 break;
1612
1613 /*
1614 * Refresh the desc even if buffer_addrs didn't change
1615 * because each write-back erases this info.
1616 */
1617 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
1618
1619 rx_desc++;
1620 bi++;
1621 i++;
1622 if (unlikely(!i)) {
1623 rx_desc = IXGBE_RX_DESC(rx_ring, 0);
1624 bi = rx_ring->rx_buffer_info;
1625 i -= rx_ring->count;
1626 }
1627
1628 /* clear the status bits for the next_to_use descriptor */
1629 rx_desc->wb.upper.status_error = 0;
1630
1631 cleaned_count--;
1632 } while (cleaned_count);
1633
1634 i += rx_ring->count;
1635
1636 if (rx_ring->next_to_use != i) {
1637 rx_ring->next_to_use = i;
1638
1639 /* update next to alloc since we have filled the ring */
1640 rx_ring->next_to_alloc = i;
1641
1642 /* Force memory writes to complete before letting h/w
1643 * know there are new descriptors to fetch. (Only
1644 * applicable for weak-ordered memory model archs,
1645 * such as IA-64).
1646 */
1647 wmb();
1648 writel(i, rx_ring->tail);
1649 }
1650 }
1651
1652 static void ixgbe_set_rsc_gso_size(struct ixgbe_ring *ring,
1653 struct sk_buff *skb)
1654 {
1655 u16 hdr_len = skb_headlen(skb);
1656
1657 /* set gso_size to avoid messing up TCP MSS */
1658 skb_shinfo(skb)->gso_size = DIV_ROUND_UP((skb->len - hdr_len),
1659 IXGBE_CB(skb)->append_cnt);
1660 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1661 }
1662
1663 static void ixgbe_update_rsc_stats(struct ixgbe_ring *rx_ring,
1664 struct sk_buff *skb)
1665 {
1666 /* if append_cnt is 0 then frame is not RSC */
1667 if (!IXGBE_CB(skb)->append_cnt)
1668 return;
1669
1670 rx_ring->rx_stats.rsc_count += IXGBE_CB(skb)->append_cnt;
1671 rx_ring->rx_stats.rsc_flush++;
1672
1673 ixgbe_set_rsc_gso_size(rx_ring, skb);
1674
1675 /* gso_size is computed using append_cnt so always clear it last */
1676 IXGBE_CB(skb)->append_cnt = 0;
1677 }
1678
1679 /**
1680 * ixgbe_process_skb_fields - Populate skb header fields from Rx descriptor
1681 * @rx_ring: rx descriptor ring packet is being transacted on
1682 * @rx_desc: pointer to the EOP Rx descriptor
1683 * @skb: pointer to current skb being populated
1684 *
1685 * This function checks the ring, descriptor, and packet information in
1686 * order to populate the hash, checksum, VLAN, timestamp, protocol, and
1687 * other fields within the skb.
1688 **/
1689 static void ixgbe_process_skb_fields(struct ixgbe_ring *rx_ring,
1690 union ixgbe_adv_rx_desc *rx_desc,
1691 struct sk_buff *skb)
1692 {
1693 struct net_device *dev = rx_ring->netdev;
1694 u32 flags = rx_ring->q_vector->adapter->flags;
1695
1696 ixgbe_update_rsc_stats(rx_ring, skb);
1697
1698 ixgbe_rx_hash(rx_ring, rx_desc, skb);
1699
1700 ixgbe_rx_checksum(rx_ring, rx_desc, skb);
1701
1702 if (unlikely(flags & IXGBE_FLAG_RX_HWTSTAMP_ENABLED))
1703 ixgbe_ptp_rx_hwtstamp(rx_ring, rx_desc, skb);
1704
1705 if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
1706 ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
1707 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
1708 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1709 }
1710
1711 skb_record_rx_queue(skb, rx_ring->queue_index);
1712
1713 skb->protocol = eth_type_trans(skb, dev);
1714 }
1715
1716 static void ixgbe_rx_skb(struct ixgbe_q_vector *q_vector,
1717 struct sk_buff *skb)
1718 {
1719 skb_mark_napi_id(skb, &q_vector->napi);
1720 if (ixgbe_qv_busy_polling(q_vector))
1721 netif_receive_skb(skb);
1722 else
1723 napi_gro_receive(&q_vector->napi, skb);
1724 }
1725
1726 /**
1727 * ixgbe_is_non_eop - process handling of non-EOP buffers
1728 * @rx_ring: Rx ring being processed
1729 * @rx_desc: Rx descriptor for current buffer
1730 * @skb: Current socket buffer containing buffer in progress
1731 *
1732 * This function updates next to clean. If the buffer is an EOP buffer
1733 * this function exits returning false, otherwise it will place the
1734 * sk_buff in the next buffer to be chained and return true indicating
1735 * that this is in fact a non-EOP buffer.
1736 **/
1737 static bool ixgbe_is_non_eop(struct ixgbe_ring *rx_ring,
1738 union ixgbe_adv_rx_desc *rx_desc,
1739 struct sk_buff *skb)
1740 {
1741 u32 ntc = rx_ring->next_to_clean + 1;
1742
1743 /* fetch, update, and store next to clean */
1744 ntc = (ntc < rx_ring->count) ? ntc : 0;
1745 rx_ring->next_to_clean = ntc;
1746
1747 prefetch(IXGBE_RX_DESC(rx_ring, ntc));
1748
1749 /* update RSC append count if present */
1750 if (ring_is_rsc_enabled(rx_ring)) {
1751 __le32 rsc_enabled = rx_desc->wb.lower.lo_dword.data &
1752 cpu_to_le32(IXGBE_RXDADV_RSCCNT_MASK);
1753
1754 if (unlikely(rsc_enabled)) {
1755 u32 rsc_cnt = le32_to_cpu(rsc_enabled);
1756
1757 rsc_cnt >>= IXGBE_RXDADV_RSCCNT_SHIFT;
1758 IXGBE_CB(skb)->append_cnt += rsc_cnt - 1;
1759
1760 /* update ntc based on RSC value */
1761 ntc = le32_to_cpu(rx_desc->wb.upper.status_error);
1762 ntc &= IXGBE_RXDADV_NEXTP_MASK;
1763 ntc >>= IXGBE_RXDADV_NEXTP_SHIFT;
1764 }
1765 }
1766
1767 /* if we are the last buffer then there is nothing else to do */
1768 if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
1769 return false;
1770
1771 /* place skb in next buffer to be received */
1772 rx_ring->rx_buffer_info[ntc].skb = skb;
1773 rx_ring->rx_stats.non_eop_descs++;
1774
1775 return true;
1776 }
1777
1778 /**
1779 * ixgbe_pull_tail - ixgbe specific version of skb_pull_tail
1780 * @rx_ring: rx descriptor ring packet is being transacted on
1781 * @skb: pointer to current skb being adjusted
1782 *
1783 * This function is an ixgbe specific version of __pskb_pull_tail. The
1784 * main difference between this version and the original function is that
1785 * this function can make several assumptions about the state of things
1786 * that allow for significant optimizations versus the standard function.
1787 * As a result we can do things like drop a frag and maintain an accurate
1788 * truesize for the skb.
1789 */
1790 static void ixgbe_pull_tail(struct ixgbe_ring *rx_ring,
1791 struct sk_buff *skb)
1792 {
1793 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
1794 unsigned char *va;
1795 unsigned int pull_len;
1796
1797 /*
1798 * it is valid to use page_address instead of kmap since we are
1799 * working with pages allocated out of the lomem pool per
1800 * alloc_page(GFP_ATOMIC)
1801 */
1802 va = skb_frag_address(frag);
1803
1804 /*
1805 * we need the header to contain the greater of either ETH_HLEN or
1806 * 60 bytes if the skb->len is less than 60 for skb_pad.
1807 */
1808 pull_len = eth_get_headlen(va, IXGBE_RX_HDR_SIZE);
1809
1810 /* align pull length to size of long to optimize memcpy performance */
1811 skb_copy_to_linear_data(skb, va, ALIGN(pull_len, sizeof(long)));
1812
1813 /* update all of the pointers */
1814 skb_frag_size_sub(frag, pull_len);
1815 frag->page_offset += pull_len;
1816 skb->data_len -= pull_len;
1817 skb->tail += pull_len;
1818 }
1819
1820 /**
1821 * ixgbe_dma_sync_frag - perform DMA sync for first frag of SKB
1822 * @rx_ring: rx descriptor ring packet is being transacted on
1823 * @skb: pointer to current skb being updated
1824 *
1825 * This function provides a basic DMA sync up for the first fragment of an
1826 * skb. The reason for doing this is that the first fragment cannot be
1827 * unmapped until we have reached the end of packet descriptor for a buffer
1828 * chain.
1829 */
1830 static void ixgbe_dma_sync_frag(struct ixgbe_ring *rx_ring,
1831 struct sk_buff *skb)
1832 {
1833 /* if the page was released unmap it, else just sync our portion */
1834 if (unlikely(IXGBE_CB(skb)->page_released)) {
1835 dma_unmap_page(rx_ring->dev, IXGBE_CB(skb)->dma,
1836 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
1837 IXGBE_CB(skb)->page_released = false;
1838 } else {
1839 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
1840
1841 dma_sync_single_range_for_cpu(rx_ring->dev,
1842 IXGBE_CB(skb)->dma,
1843 frag->page_offset,
1844 ixgbe_rx_bufsz(rx_ring),
1845 DMA_FROM_DEVICE);
1846 }
1847 IXGBE_CB(skb)->dma = 0;
1848 }
1849
1850 /**
1851 * ixgbe_cleanup_headers - Correct corrupted or empty headers
1852 * @rx_ring: rx descriptor ring packet is being transacted on
1853 * @rx_desc: pointer to the EOP Rx descriptor
1854 * @skb: pointer to current skb being fixed
1855 *
1856 * Check for corrupted packet headers caused by senders on the local L2
1857 * embedded NIC switch not setting up their Tx Descriptors right. These
1858 * should be very rare.
1859 *
1860 * Also address the case where we are pulling data in on pages only
1861 * and as such no data is present in the skb header.
1862 *
1863 * In addition if skb is not at least 60 bytes we need to pad it so that
1864 * it is large enough to qualify as a valid Ethernet frame.
1865 *
1866 * Returns true if an error was encountered and skb was freed.
1867 **/
1868 static bool ixgbe_cleanup_headers(struct ixgbe_ring *rx_ring,
1869 union ixgbe_adv_rx_desc *rx_desc,
1870 struct sk_buff *skb)
1871 {
1872 struct net_device *netdev = rx_ring->netdev;
1873
1874 /* verify that the packet does not have any known errors */
1875 if (unlikely(ixgbe_test_staterr(rx_desc,
1876 IXGBE_RXDADV_ERR_FRAME_ERR_MASK) &&
1877 !(netdev->features & NETIF_F_RXALL))) {
1878 dev_kfree_skb_any(skb);
1879 return true;
1880 }
1881
1882 /* place header in linear portion of buffer */
1883 if (skb_is_nonlinear(skb))
1884 ixgbe_pull_tail(rx_ring, skb);
1885
1886 #ifdef IXGBE_FCOE
1887 /* do not attempt to pad FCoE Frames as this will disrupt DDP */
1888 if (ixgbe_rx_is_fcoe(rx_ring, rx_desc))
1889 return false;
1890
1891 #endif
1892 /* if eth_skb_pad returns an error the skb was freed */
1893 if (eth_skb_pad(skb))
1894 return true;
1895
1896 return false;
1897 }
1898
1899 /**
1900 * ixgbe_reuse_rx_page - page flip buffer and store it back on the ring
1901 * @rx_ring: rx descriptor ring to store buffers on
1902 * @old_buff: donor buffer to have page reused
1903 *
1904 * Synchronizes page for reuse by the adapter
1905 **/
1906 static void ixgbe_reuse_rx_page(struct ixgbe_ring *rx_ring,
1907 struct ixgbe_rx_buffer *old_buff)
1908 {
1909 struct ixgbe_rx_buffer *new_buff;
1910 u16 nta = rx_ring->next_to_alloc;
1911
1912 new_buff = &rx_ring->rx_buffer_info[nta];
1913
1914 /* update, and store next to alloc */
1915 nta++;
1916 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
1917
1918 /* transfer page from old buffer to new buffer */
1919 *new_buff = *old_buff;
1920
1921 /* sync the buffer for use by the device */
1922 dma_sync_single_range_for_device(rx_ring->dev, new_buff->dma,
1923 new_buff->page_offset,
1924 ixgbe_rx_bufsz(rx_ring),
1925 DMA_FROM_DEVICE);
1926 }
1927
1928 static inline bool ixgbe_page_is_reserved(struct page *page)
1929 {
1930 return (page_to_nid(page) != numa_mem_id()) || page_is_pfmemalloc(page);
1931 }
1932
1933 /**
1934 * ixgbe_add_rx_frag - Add contents of Rx buffer to sk_buff
1935 * @rx_ring: rx descriptor ring to transact packets on
1936 * @rx_buffer: buffer containing page to add
1937 * @rx_desc: descriptor containing length of buffer written by hardware
1938 * @skb: sk_buff to place the data into
1939 *
1940 * This function will add the data contained in rx_buffer->page to the skb.
1941 * This is done either through a direct copy if the data in the buffer is
1942 * less than the skb header size, otherwise it will just attach the page as
1943 * a frag to the skb.
1944 *
1945 * The function will then update the page offset if necessary and return
1946 * true if the buffer can be reused by the adapter.
1947 **/
1948 static bool ixgbe_add_rx_frag(struct ixgbe_ring *rx_ring,
1949 struct ixgbe_rx_buffer *rx_buffer,
1950 union ixgbe_adv_rx_desc *rx_desc,
1951 struct sk_buff *skb)
1952 {
1953 struct page *page = rx_buffer->page;
1954 unsigned int size = le16_to_cpu(rx_desc->wb.upper.length);
1955 #if (PAGE_SIZE < 8192)
1956 unsigned int truesize = ixgbe_rx_bufsz(rx_ring);
1957 #else
1958 unsigned int truesize = ALIGN(size, L1_CACHE_BYTES);
1959 unsigned int last_offset = ixgbe_rx_pg_size(rx_ring) -
1960 ixgbe_rx_bufsz(rx_ring);
1961 #endif
1962
1963 if ((size <= IXGBE_RX_HDR_SIZE) && !skb_is_nonlinear(skb)) {
1964 unsigned char *va = page_address(page) + rx_buffer->page_offset;
1965
1966 memcpy(__skb_put(skb, size), va, ALIGN(size, sizeof(long)));
1967
1968 /* page is not reserved, we can reuse buffer as-is */
1969 if (likely(!ixgbe_page_is_reserved(page)))
1970 return true;
1971
1972 /* this page cannot be reused so discard it */
1973 __free_pages(page, ixgbe_rx_pg_order(rx_ring));
1974 return false;
1975 }
1976
1977 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
1978 rx_buffer->page_offset, size, truesize);
1979
1980 /* avoid re-using remote pages */
1981 if (unlikely(ixgbe_page_is_reserved(page)))
1982 return false;
1983
1984 #if (PAGE_SIZE < 8192)
1985 /* if we are only owner of page we can reuse it */
1986 if (unlikely(page_count(page) != 1))
1987 return false;
1988
1989 /* flip page offset to other buffer */
1990 rx_buffer->page_offset ^= truesize;
1991 #else
1992 /* move offset up to the next cache line */
1993 rx_buffer->page_offset += truesize;
1994
1995 if (rx_buffer->page_offset > last_offset)
1996 return false;
1997 #endif
1998
1999 /* Even if we own the page, we are not allowed to use atomic_set()
2000 * This would break get_page_unless_zero() users.
2001 */
2002 page_ref_inc(page);
2003
2004 return true;
2005 }
2006
2007 static struct sk_buff *ixgbe_fetch_rx_buffer(struct ixgbe_ring *rx_ring,
2008 union ixgbe_adv_rx_desc *rx_desc)
2009 {
2010 struct ixgbe_rx_buffer *rx_buffer;
2011 struct sk_buff *skb;
2012 struct page *page;
2013
2014 rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
2015 page = rx_buffer->page;
2016 prefetchw(page);
2017
2018 skb = rx_buffer->skb;
2019
2020 if (likely(!skb)) {
2021 void *page_addr = page_address(page) +
2022 rx_buffer->page_offset;
2023
2024 /* prefetch first cache line of first page */
2025 prefetch(page_addr);
2026 #if L1_CACHE_BYTES < 128
2027 prefetch(page_addr + L1_CACHE_BYTES);
2028 #endif
2029
2030 /* allocate a skb to store the frags */
2031 skb = napi_alloc_skb(&rx_ring->q_vector->napi,
2032 IXGBE_RX_HDR_SIZE);
2033 if (unlikely(!skb)) {
2034 rx_ring->rx_stats.alloc_rx_buff_failed++;
2035 return NULL;
2036 }
2037
2038 /*
2039 * we will be copying header into skb->data in
2040 * pskb_may_pull so it is in our interest to prefetch
2041 * it now to avoid a possible cache miss
2042 */
2043 prefetchw(skb->data);
2044
2045 /*
2046 * Delay unmapping of the first packet. It carries the
2047 * header information, HW may still access the header
2048 * after the writeback. Only unmap it when EOP is
2049 * reached
2050 */
2051 if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
2052 goto dma_sync;
2053
2054 IXGBE_CB(skb)->dma = rx_buffer->dma;
2055 } else {
2056 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP))
2057 ixgbe_dma_sync_frag(rx_ring, skb);
2058
2059 dma_sync:
2060 /* we are reusing so sync this buffer for CPU use */
2061 dma_sync_single_range_for_cpu(rx_ring->dev,
2062 rx_buffer->dma,
2063 rx_buffer->page_offset,
2064 ixgbe_rx_bufsz(rx_ring),
2065 DMA_FROM_DEVICE);
2066
2067 rx_buffer->skb = NULL;
2068 }
2069
2070 /* pull page into skb */
2071 if (ixgbe_add_rx_frag(rx_ring, rx_buffer, rx_desc, skb)) {
2072 /* hand second half of page back to the ring */
2073 ixgbe_reuse_rx_page(rx_ring, rx_buffer);
2074 } else if (IXGBE_CB(skb)->dma == rx_buffer->dma) {
2075 /* the page has been released from the ring */
2076 IXGBE_CB(skb)->page_released = true;
2077 } else {
2078 /* we are not reusing the buffer so unmap it */
2079 dma_unmap_page(rx_ring->dev, rx_buffer->dma,
2080 ixgbe_rx_pg_size(rx_ring),
2081 DMA_FROM_DEVICE);
2082 }
2083
2084 /* clear contents of buffer_info */
2085 rx_buffer->page = NULL;
2086
2087 return skb;
2088 }
2089
2090 /**
2091 * ixgbe_clean_rx_irq - Clean completed descriptors from Rx ring - bounce buf
2092 * @q_vector: structure containing interrupt and ring information
2093 * @rx_ring: rx descriptor ring to transact packets on
2094 * @budget: Total limit on number of packets to process
2095 *
2096 * This function provides a "bounce buffer" approach to Rx interrupt
2097 * processing. The advantage to this is that on systems that have
2098 * expensive overhead for IOMMU access this provides a means of avoiding
2099 * it by maintaining the mapping of the page to the syste.
2100 *
2101 * Returns amount of work completed
2102 **/
2103 static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
2104 struct ixgbe_ring *rx_ring,
2105 const int budget)
2106 {
2107 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
2108 #ifdef IXGBE_FCOE
2109 struct ixgbe_adapter *adapter = q_vector->adapter;
2110 int ddp_bytes;
2111 unsigned int mss = 0;
2112 #endif /* IXGBE_FCOE */
2113 u16 cleaned_count = ixgbe_desc_unused(rx_ring);
2114
2115 while (likely(total_rx_packets < budget)) {
2116 union ixgbe_adv_rx_desc *rx_desc;
2117 struct sk_buff *skb;
2118
2119 /* return some buffers to hardware, one at a time is too slow */
2120 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
2121 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
2122 cleaned_count = 0;
2123 }
2124
2125 rx_desc = IXGBE_RX_DESC(rx_ring, rx_ring->next_to_clean);
2126
2127 if (!rx_desc->wb.upper.status_error)
2128 break;
2129
2130 /* This memory barrier is needed to keep us from reading
2131 * any other fields out of the rx_desc until we know the
2132 * descriptor has been written back
2133 */
2134 dma_rmb();
2135
2136 /* retrieve a buffer from the ring */
2137 skb = ixgbe_fetch_rx_buffer(rx_ring, rx_desc);
2138
2139 /* exit if we failed to retrieve a buffer */
2140 if (!skb)
2141 break;
2142
2143 cleaned_count++;
2144
2145 /* place incomplete frames back on ring for completion */
2146 if (ixgbe_is_non_eop(rx_ring, rx_desc, skb))
2147 continue;
2148
2149 /* verify the packet layout is correct */
2150 if (ixgbe_cleanup_headers(rx_ring, rx_desc, skb))
2151 continue;
2152
2153 /* probably a little skewed due to removing CRC */
2154 total_rx_bytes += skb->len;
2155
2156 /* populate checksum, timestamp, VLAN, and protocol */
2157 ixgbe_process_skb_fields(rx_ring, rx_desc, skb);
2158
2159 #ifdef IXGBE_FCOE
2160 /* if ddp, not passing to ULD unless for FCP_RSP or error */
2161 if (ixgbe_rx_is_fcoe(rx_ring, rx_desc)) {
2162 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
2163 /* include DDPed FCoE data */
2164 if (ddp_bytes > 0) {
2165 if (!mss) {
2166 mss = rx_ring->netdev->mtu -
2167 sizeof(struct fcoe_hdr) -
2168 sizeof(struct fc_frame_header) -
2169 sizeof(struct fcoe_crc_eof);
2170 if (mss > 512)
2171 mss &= ~511;
2172 }
2173 total_rx_bytes += ddp_bytes;
2174 total_rx_packets += DIV_ROUND_UP(ddp_bytes,
2175 mss);
2176 }
2177 if (!ddp_bytes) {
2178 dev_kfree_skb_any(skb);
2179 continue;
2180 }
2181 }
2182
2183 #endif /* IXGBE_FCOE */
2184 ixgbe_rx_skb(q_vector, skb);
2185
2186 /* update budget accounting */
2187 total_rx_packets++;
2188 }
2189
2190 u64_stats_update_begin(&rx_ring->syncp);
2191 rx_ring->stats.packets += total_rx_packets;
2192 rx_ring->stats.bytes += total_rx_bytes;
2193 u64_stats_update_end(&rx_ring->syncp);
2194 q_vector->rx.total_packets += total_rx_packets;
2195 q_vector->rx.total_bytes += total_rx_bytes;
2196
2197 return total_rx_packets;
2198 }
2199
2200 #ifdef CONFIG_NET_RX_BUSY_POLL
2201 /* must be called with local_bh_disable()d */
2202 static int ixgbe_low_latency_recv(struct napi_struct *napi)
2203 {
2204 struct ixgbe_q_vector *q_vector =
2205 container_of(napi, struct ixgbe_q_vector, napi);
2206 struct ixgbe_adapter *adapter = q_vector->adapter;
2207 struct ixgbe_ring *ring;
2208 int found = 0;
2209
2210 if (test_bit(__IXGBE_DOWN, &adapter->state))
2211 return LL_FLUSH_FAILED;
2212
2213 if (!ixgbe_qv_lock_poll(q_vector))
2214 return LL_FLUSH_BUSY;
2215
2216 ixgbe_for_each_ring(ring, q_vector->rx) {
2217 found = ixgbe_clean_rx_irq(q_vector, ring, 4);
2218 #ifdef BP_EXTENDED_STATS
2219 if (found)
2220 ring->stats.cleaned += found;
2221 else
2222 ring->stats.misses++;
2223 #endif
2224 if (found)
2225 break;
2226 }
2227
2228 ixgbe_qv_unlock_poll(q_vector);
2229
2230 return found;
2231 }
2232 #endif /* CONFIG_NET_RX_BUSY_POLL */
2233
2234 /**
2235 * ixgbe_configure_msix - Configure MSI-X hardware
2236 * @adapter: board private structure
2237 *
2238 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
2239 * interrupts.
2240 **/
2241 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
2242 {
2243 struct ixgbe_q_vector *q_vector;
2244 int v_idx;
2245 u32 mask;
2246
2247 /* Populate MSIX to EITR Select */
2248 if (adapter->num_vfs > 32) {
2249 u32 eitrsel = BIT(adapter->num_vfs - 32) - 1;
2250 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
2251 }
2252
2253 /*
2254 * Populate the IVAR table and set the ITR values to the
2255 * corresponding register.
2256 */
2257 for (v_idx = 0; v_idx < adapter->num_q_vectors; v_idx++) {
2258 struct ixgbe_ring *ring;
2259 q_vector = adapter->q_vector[v_idx];
2260
2261 ixgbe_for_each_ring(ring, q_vector->rx)
2262 ixgbe_set_ivar(adapter, 0, ring->reg_idx, v_idx);
2263
2264 ixgbe_for_each_ring(ring, q_vector->tx)
2265 ixgbe_set_ivar(adapter, 1, ring->reg_idx, v_idx);
2266
2267 ixgbe_write_eitr(q_vector);
2268 }
2269
2270 switch (adapter->hw.mac.type) {
2271 case ixgbe_mac_82598EB:
2272 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
2273 v_idx);
2274 break;
2275 case ixgbe_mac_82599EB:
2276 case ixgbe_mac_X540:
2277 case ixgbe_mac_X550:
2278 case ixgbe_mac_X550EM_x:
2279 case ixgbe_mac_x550em_a:
2280 ixgbe_set_ivar(adapter, -1, 1, v_idx);
2281 break;
2282 default:
2283 break;
2284 }
2285 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
2286
2287 /* set up to autoclear timer, and the vectors */
2288 mask = IXGBE_EIMS_ENABLE_MASK;
2289 mask &= ~(IXGBE_EIMS_OTHER |
2290 IXGBE_EIMS_MAILBOX |
2291 IXGBE_EIMS_LSC);
2292
2293 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
2294 }
2295
2296 enum latency_range {
2297 lowest_latency = 0,
2298 low_latency = 1,
2299 bulk_latency = 2,
2300 latency_invalid = 255
2301 };
2302
2303 /**
2304 * ixgbe_update_itr - update the dynamic ITR value based on statistics
2305 * @q_vector: structure containing interrupt and ring information
2306 * @ring_container: structure containing ring performance data
2307 *
2308 * Stores a new ITR value based on packets and byte
2309 * counts during the last interrupt. The advantage of per interrupt
2310 * computation is faster updates and more accurate ITR for the current
2311 * traffic pattern. Constants in this function were computed
2312 * based on theoretical maximum wire speed and thresholds were set based
2313 * on testing data as well as attempting to minimize response time
2314 * while increasing bulk throughput.
2315 * this functionality is controlled by the InterruptThrottleRate module
2316 * parameter (see ixgbe_param.c)
2317 **/
2318 static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
2319 struct ixgbe_ring_container *ring_container)
2320 {
2321 int bytes = ring_container->total_bytes;
2322 int packets = ring_container->total_packets;
2323 u32 timepassed_us;
2324 u64 bytes_perint;
2325 u8 itr_setting = ring_container->itr;
2326
2327 if (packets == 0)
2328 return;
2329
2330 /* simple throttlerate management
2331 * 0-10MB/s lowest (100000 ints/s)
2332 * 10-20MB/s low (20000 ints/s)
2333 * 20-1249MB/s bulk (12000 ints/s)
2334 */
2335 /* what was last interrupt timeslice? */
2336 timepassed_us = q_vector->itr >> 2;
2337 if (timepassed_us == 0)
2338 return;
2339
2340 bytes_perint = bytes / timepassed_us; /* bytes/usec */
2341
2342 switch (itr_setting) {
2343 case lowest_latency:
2344 if (bytes_perint > 10)
2345 itr_setting = low_latency;
2346 break;
2347 case low_latency:
2348 if (bytes_perint > 20)
2349 itr_setting = bulk_latency;
2350 else if (bytes_perint <= 10)
2351 itr_setting = lowest_latency;
2352 break;
2353 case bulk_latency:
2354 if (bytes_perint <= 20)
2355 itr_setting = low_latency;
2356 break;
2357 }
2358
2359 /* clear work counters since we have the values we need */
2360 ring_container->total_bytes = 0;
2361 ring_container->total_packets = 0;
2362
2363 /* write updated itr to ring container */
2364 ring_container->itr = itr_setting;
2365 }
2366
2367 /**
2368 * ixgbe_write_eitr - write EITR register in hardware specific way
2369 * @q_vector: structure containing interrupt and ring information
2370 *
2371 * This function is made to be called by ethtool and by the driver
2372 * when it needs to update EITR registers at runtime. Hardware
2373 * specific quirks/differences are taken care of here.
2374 */
2375 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
2376 {
2377 struct ixgbe_adapter *adapter = q_vector->adapter;
2378 struct ixgbe_hw *hw = &adapter->hw;
2379 int v_idx = q_vector->v_idx;
2380 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
2381
2382 switch (adapter->hw.mac.type) {
2383 case ixgbe_mac_82598EB:
2384 /* must write high and low 16 bits to reset counter */
2385 itr_reg |= (itr_reg << 16);
2386 break;
2387 case ixgbe_mac_82599EB:
2388 case ixgbe_mac_X540:
2389 case ixgbe_mac_X550:
2390 case ixgbe_mac_X550EM_x:
2391 case ixgbe_mac_x550em_a:
2392 /*
2393 * set the WDIS bit to not clear the timer bits and cause an
2394 * immediate assertion of the interrupt
2395 */
2396 itr_reg |= IXGBE_EITR_CNT_WDIS;
2397 break;
2398 default:
2399 break;
2400 }
2401 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
2402 }
2403
2404 static void ixgbe_set_itr(struct ixgbe_q_vector *q_vector)
2405 {
2406 u32 new_itr = q_vector->itr;
2407 u8 current_itr;
2408
2409 ixgbe_update_itr(q_vector, &q_vector->tx);
2410 ixgbe_update_itr(q_vector, &q_vector->rx);
2411
2412 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
2413
2414 switch (current_itr) {
2415 /* counts and packets in update_itr are dependent on these numbers */
2416 case lowest_latency:
2417 new_itr = IXGBE_100K_ITR;
2418 break;
2419 case low_latency:
2420 new_itr = IXGBE_20K_ITR;
2421 break;
2422 case bulk_latency:
2423 new_itr = IXGBE_12K_ITR;
2424 break;
2425 default:
2426 break;
2427 }
2428
2429 if (new_itr != q_vector->itr) {
2430 /* do an exponential smoothing */
2431 new_itr = (10 * new_itr * q_vector->itr) /
2432 ((9 * new_itr) + q_vector->itr);
2433
2434 /* save the algorithm value here */
2435 q_vector->itr = new_itr;
2436
2437 ixgbe_write_eitr(q_vector);
2438 }
2439 }
2440
2441 /**
2442 * ixgbe_check_overtemp_subtask - check for over temperature
2443 * @adapter: pointer to adapter
2444 **/
2445 static void ixgbe_check_overtemp_subtask(struct ixgbe_adapter *adapter)
2446 {
2447 struct ixgbe_hw *hw = &adapter->hw;
2448 u32 eicr = adapter->interrupt_event;
2449
2450 if (test_bit(__IXGBE_DOWN, &adapter->state))
2451 return;
2452
2453 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
2454 !(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_EVENT))
2455 return;
2456
2457 adapter->flags2 &= ~IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2458
2459 switch (hw->device_id) {
2460 case IXGBE_DEV_ID_82599_T3_LOM:
2461 /*
2462 * Since the warning interrupt is for both ports
2463 * we don't have to check if:
2464 * - This interrupt wasn't for our port.
2465 * - We may have missed the interrupt so always have to
2466 * check if we got a LSC
2467 */
2468 if (!(eicr & IXGBE_EICR_GPI_SDP0_8259X) &&
2469 !(eicr & IXGBE_EICR_LSC))
2470 return;
2471
2472 if (!(eicr & IXGBE_EICR_LSC) && hw->mac.ops.check_link) {
2473 u32 speed;
2474 bool link_up = false;
2475
2476 hw->mac.ops.check_link(hw, &speed, &link_up, false);
2477
2478 if (link_up)
2479 return;
2480 }
2481
2482 /* Check if this is not due to overtemp */
2483 if (hw->phy.ops.check_overtemp(hw) != IXGBE_ERR_OVERTEMP)
2484 return;
2485
2486 break;
2487 default:
2488 if (adapter->hw.mac.type >= ixgbe_mac_X540)
2489 return;
2490 if (!(eicr & IXGBE_EICR_GPI_SDP0(hw)))
2491 return;
2492 break;
2493 }
2494 e_crit(drv, "%s\n", ixgbe_overheat_msg);
2495
2496 adapter->interrupt_event = 0;
2497 }
2498
2499 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
2500 {
2501 struct ixgbe_hw *hw = &adapter->hw;
2502
2503 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
2504 (eicr & IXGBE_EICR_GPI_SDP1(hw))) {
2505 e_crit(probe, "Fan has stopped, replace the adapter\n");
2506 /* write to clear the interrupt */
2507 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1(hw));
2508 }
2509 }
2510
2511 static void ixgbe_check_overtemp_event(struct ixgbe_adapter *adapter, u32 eicr)
2512 {
2513 struct ixgbe_hw *hw = &adapter->hw;
2514
2515 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE))
2516 return;
2517
2518 switch (adapter->hw.mac.type) {
2519 case ixgbe_mac_82599EB:
2520 /*
2521 * Need to check link state so complete overtemp check
2522 * on service task
2523 */
2524 if (((eicr & IXGBE_EICR_GPI_SDP0(hw)) ||
2525 (eicr & IXGBE_EICR_LSC)) &&
2526 (!test_bit(__IXGBE_DOWN, &adapter->state))) {
2527 adapter->interrupt_event = eicr;
2528 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2529 ixgbe_service_event_schedule(adapter);
2530 return;
2531 }
2532 return;
2533 case ixgbe_mac_X540:
2534 if (!(eicr & IXGBE_EICR_TS))
2535 return;
2536 break;
2537 default:
2538 return;
2539 }
2540
2541 e_crit(drv, "%s\n", ixgbe_overheat_msg);
2542 }
2543
2544 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
2545 {
2546 switch (hw->mac.type) {
2547 case ixgbe_mac_82598EB:
2548 if (hw->phy.type == ixgbe_phy_nl)
2549 return true;
2550 return false;
2551 case ixgbe_mac_82599EB:
2552 case ixgbe_mac_X550EM_x:
2553 case ixgbe_mac_x550em_a:
2554 switch (hw->mac.ops.get_media_type(hw)) {
2555 case ixgbe_media_type_fiber:
2556 case ixgbe_media_type_fiber_qsfp:
2557 return true;
2558 default:
2559 return false;
2560 }
2561 default:
2562 return false;
2563 }
2564 }
2565
2566 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
2567 {
2568 struct ixgbe_hw *hw = &adapter->hw;
2569 u32 eicr_mask = IXGBE_EICR_GPI_SDP2(hw);
2570
2571 if (!ixgbe_is_sfp(hw))
2572 return;
2573
2574 /* Later MAC's use different SDP */
2575 if (hw->mac.type >= ixgbe_mac_X540)
2576 eicr_mask = IXGBE_EICR_GPI_SDP0_X540;
2577
2578 if (eicr & eicr_mask) {
2579 /* Clear the interrupt */
2580 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr_mask);
2581 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2582 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
2583 adapter->sfp_poll_time = 0;
2584 ixgbe_service_event_schedule(adapter);
2585 }
2586 }
2587
2588 if (adapter->hw.mac.type == ixgbe_mac_82599EB &&
2589 (eicr & IXGBE_EICR_GPI_SDP1(hw))) {
2590 /* Clear the interrupt */
2591 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1(hw));
2592 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2593 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
2594 ixgbe_service_event_schedule(adapter);
2595 }
2596 }
2597 }
2598
2599 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
2600 {
2601 struct ixgbe_hw *hw = &adapter->hw;
2602
2603 adapter->lsc_int++;
2604 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2605 adapter->link_check_timeout = jiffies;
2606 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2607 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
2608 IXGBE_WRITE_FLUSH(hw);
2609 ixgbe_service_event_schedule(adapter);
2610 }
2611 }
2612
2613 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
2614 u64 qmask)
2615 {
2616 u32 mask;
2617 struct ixgbe_hw *hw = &adapter->hw;
2618
2619 switch (hw->mac.type) {
2620 case ixgbe_mac_82598EB:
2621 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
2622 IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
2623 break;
2624 case ixgbe_mac_82599EB:
2625 case ixgbe_mac_X540:
2626 case ixgbe_mac_X550:
2627 case ixgbe_mac_X550EM_x:
2628 case ixgbe_mac_x550em_a:
2629 mask = (qmask & 0xFFFFFFFF);
2630 if (mask)
2631 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
2632 mask = (qmask >> 32);
2633 if (mask)
2634 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
2635 break;
2636 default:
2637 break;
2638 }
2639 /* skip the flush */
2640 }
2641
2642 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
2643 u64 qmask)
2644 {
2645 u32 mask;
2646 struct ixgbe_hw *hw = &adapter->hw;
2647
2648 switch (hw->mac.type) {
2649 case ixgbe_mac_82598EB:
2650 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
2651 IXGBE_WRITE_REG(hw, IXGBE_EIMC, mask);
2652 break;
2653 case ixgbe_mac_82599EB:
2654 case ixgbe_mac_X540:
2655 case ixgbe_mac_X550:
2656 case ixgbe_mac_X550EM_x:
2657 case ixgbe_mac_x550em_a:
2658 mask = (qmask & 0xFFFFFFFF);
2659 if (mask)
2660 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(0), mask);
2661 mask = (qmask >> 32);
2662 if (mask)
2663 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(1), mask);
2664 break;
2665 default:
2666 break;
2667 }
2668 /* skip the flush */
2669 }
2670
2671 /**
2672 * ixgbe_irq_enable - Enable default interrupt generation settings
2673 * @adapter: board private structure
2674 **/
2675 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
2676 bool flush)
2677 {
2678 struct ixgbe_hw *hw = &adapter->hw;
2679 u32 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
2680
2681 /* don't reenable LSC while waiting for link */
2682 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
2683 mask &= ~IXGBE_EIMS_LSC;
2684
2685 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
2686 switch (adapter->hw.mac.type) {
2687 case ixgbe_mac_82599EB:
2688 mask |= IXGBE_EIMS_GPI_SDP0(hw);
2689 break;
2690 case ixgbe_mac_X540:
2691 case ixgbe_mac_X550:
2692 case ixgbe_mac_X550EM_x:
2693 case ixgbe_mac_x550em_a:
2694 mask |= IXGBE_EIMS_TS;
2695 break;
2696 default:
2697 break;
2698 }
2699 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
2700 mask |= IXGBE_EIMS_GPI_SDP1(hw);
2701 switch (adapter->hw.mac.type) {
2702 case ixgbe_mac_82599EB:
2703 mask |= IXGBE_EIMS_GPI_SDP1(hw);
2704 mask |= IXGBE_EIMS_GPI_SDP2(hw);
2705 /* fall through */
2706 case ixgbe_mac_X540:
2707 case ixgbe_mac_X550:
2708 case ixgbe_mac_X550EM_x:
2709 case ixgbe_mac_x550em_a:
2710 if (adapter->hw.device_id == IXGBE_DEV_ID_X550EM_X_SFP ||
2711 adapter->hw.device_id == IXGBE_DEV_ID_X550EM_A_SFP ||
2712 adapter->hw.device_id == IXGBE_DEV_ID_X550EM_A_SFP_N)
2713 mask |= IXGBE_EIMS_GPI_SDP0(&adapter->hw);
2714 if (adapter->hw.phy.type == ixgbe_phy_x550em_ext_t)
2715 mask |= IXGBE_EICR_GPI_SDP0_X540;
2716 mask |= IXGBE_EIMS_ECC;
2717 mask |= IXGBE_EIMS_MAILBOX;
2718 break;
2719 default:
2720 break;
2721 }
2722
2723 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
2724 !(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
2725 mask |= IXGBE_EIMS_FLOW_DIR;
2726
2727 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
2728 if (queues)
2729 ixgbe_irq_enable_queues(adapter, ~0);
2730 if (flush)
2731 IXGBE_WRITE_FLUSH(&adapter->hw);
2732 }
2733
2734 static irqreturn_t ixgbe_msix_other(int irq, void *data)
2735 {
2736 struct ixgbe_adapter *adapter = data;
2737 struct ixgbe_hw *hw = &adapter->hw;
2738 u32 eicr;
2739
2740 /*
2741 * Workaround for Silicon errata. Use clear-by-write instead
2742 * of clear-by-read. Reading with EICS will return the
2743 * interrupt causes without clearing, which later be done
2744 * with the write to EICR.
2745 */
2746 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
2747
2748 /* The lower 16bits of the EICR register are for the queue interrupts
2749 * which should be masked here in order to not accidentally clear them if
2750 * the bits are high when ixgbe_msix_other is called. There is a race
2751 * condition otherwise which results in possible performance loss
2752 * especially if the ixgbe_msix_other interrupt is triggering
2753 * consistently (as it would when PPS is turned on for the X540 device)
2754 */
2755 eicr &= 0xFFFF0000;
2756
2757 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
2758
2759 if (eicr & IXGBE_EICR_LSC)
2760 ixgbe_check_lsc(adapter);
2761
2762 if (eicr & IXGBE_EICR_MAILBOX)
2763 ixgbe_msg_task(adapter);
2764
2765 switch (hw->mac.type) {
2766 case ixgbe_mac_82599EB:
2767 case ixgbe_mac_X540:
2768 case ixgbe_mac_X550:
2769 case ixgbe_mac_X550EM_x:
2770 case ixgbe_mac_x550em_a:
2771 if (hw->phy.type == ixgbe_phy_x550em_ext_t &&
2772 (eicr & IXGBE_EICR_GPI_SDP0_X540)) {
2773 adapter->flags2 |= IXGBE_FLAG2_PHY_INTERRUPT;
2774 ixgbe_service_event_schedule(adapter);
2775 IXGBE_WRITE_REG(hw, IXGBE_EICR,
2776 IXGBE_EICR_GPI_SDP0_X540);
2777 }
2778 if (eicr & IXGBE_EICR_ECC) {
2779 e_info(link, "Received ECC Err, initiating reset\n");
2780 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
2781 ixgbe_service_event_schedule(adapter);
2782 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_ECC);
2783 }
2784 /* Handle Flow Director Full threshold interrupt */
2785 if (eicr & IXGBE_EICR_FLOW_DIR) {
2786 int reinit_count = 0;
2787 int i;
2788 for (i = 0; i < adapter->num_tx_queues; i++) {
2789 struct ixgbe_ring *ring = adapter->tx_ring[i];
2790 if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE,
2791 &ring->state))
2792 reinit_count++;
2793 }
2794 if (reinit_count) {
2795 /* no more flow director interrupts until after init */
2796 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_FLOW_DIR);
2797 adapter->flags2 |= IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
2798 ixgbe_service_event_schedule(adapter);
2799 }
2800 }
2801 ixgbe_check_sfp_event(adapter, eicr);
2802 ixgbe_check_overtemp_event(adapter, eicr);
2803 break;
2804 default:
2805 break;
2806 }
2807
2808 ixgbe_check_fan_failure(adapter, eicr);
2809
2810 if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
2811 ixgbe_ptp_check_pps_event(adapter);
2812
2813 /* re-enable the original interrupt state, no lsc, no queues */
2814 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2815 ixgbe_irq_enable(adapter, false, false);
2816
2817 return IRQ_HANDLED;
2818 }
2819
2820 static irqreturn_t ixgbe_msix_clean_rings(int irq, void *data)
2821 {
2822 struct ixgbe_q_vector *q_vector = data;
2823
2824 /* EIAM disabled interrupts (on this vector) for us */
2825
2826 if (q_vector->rx.ring || q_vector->tx.ring)
2827 napi_schedule_irqoff(&q_vector->napi);
2828
2829 return IRQ_HANDLED;
2830 }
2831
2832 /**
2833 * ixgbe_poll - NAPI Rx polling callback
2834 * @napi: structure for representing this polling device
2835 * @budget: how many packets driver is allowed to clean
2836 *
2837 * This function is used for legacy and MSI, NAPI mode
2838 **/
2839 int ixgbe_poll(struct napi_struct *napi, int budget)
2840 {
2841 struct ixgbe_q_vector *q_vector =
2842 container_of(napi, struct ixgbe_q_vector, napi);
2843 struct ixgbe_adapter *adapter = q_vector->adapter;
2844 struct ixgbe_ring *ring;
2845 int per_ring_budget, work_done = 0;
2846 bool clean_complete = true;
2847
2848 #ifdef CONFIG_IXGBE_DCA
2849 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2850 ixgbe_update_dca(q_vector);
2851 #endif
2852
2853 ixgbe_for_each_ring(ring, q_vector->tx) {
2854 if (!ixgbe_clean_tx_irq(q_vector, ring, budget))
2855 clean_complete = false;
2856 }
2857
2858 /* Exit if we are called by netpoll or busy polling is active */
2859 if ((budget <= 0) || !ixgbe_qv_lock_napi(q_vector))
2860 return budget;
2861
2862 /* attempt to distribute budget to each queue fairly, but don't allow
2863 * the budget to go below 1 because we'll exit polling */
2864 if (q_vector->rx.count > 1)
2865 per_ring_budget = max(budget/q_vector->rx.count, 1);
2866 else
2867 per_ring_budget = budget;
2868
2869 ixgbe_for_each_ring(ring, q_vector->rx) {
2870 int cleaned = ixgbe_clean_rx_irq(q_vector, ring,
2871 per_ring_budget);
2872
2873 work_done += cleaned;
2874 if (cleaned >= per_ring_budget)
2875 clean_complete = false;
2876 }
2877
2878 ixgbe_qv_unlock_napi(q_vector);
2879 /* If all work not completed, return budget and keep polling */
2880 if (!clean_complete)
2881 return budget;
2882
2883 /* all work done, exit the polling mode */
2884 napi_complete_done(napi, work_done);
2885 if (adapter->rx_itr_setting & 1)
2886 ixgbe_set_itr(q_vector);
2887 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2888 ixgbe_irq_enable_queues(adapter, BIT_ULL(q_vector->v_idx));
2889
2890 return 0;
2891 }
2892
2893 /**
2894 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2895 * @adapter: board private structure
2896 *
2897 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2898 * interrupts from the kernel.
2899 **/
2900 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2901 {
2902 struct net_device *netdev = adapter->netdev;
2903 int vector, err;
2904 int ri = 0, ti = 0;
2905
2906 for (vector = 0; vector < adapter->num_q_vectors; vector++) {
2907 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
2908 struct msix_entry *entry = &adapter->msix_entries[vector];
2909
2910 if (q_vector->tx.ring && q_vector->rx.ring) {
2911 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2912 "%s-%s-%d", netdev->name, "TxRx", ri++);
2913 ti++;
2914 } else if (q_vector->rx.ring) {
2915 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2916 "%s-%s-%d", netdev->name, "rx", ri++);
2917 } else if (q_vector->tx.ring) {
2918 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2919 "%s-%s-%d", netdev->name, "tx", ti++);
2920 } else {
2921 /* skip this unused q_vector */
2922 continue;
2923 }
2924 err = request_irq(entry->vector, &ixgbe_msix_clean_rings, 0,
2925 q_vector->name, q_vector);
2926 if (err) {
2927 e_err(probe, "request_irq failed for MSIX interrupt "
2928 "Error: %d\n", err);
2929 goto free_queue_irqs;
2930 }
2931 /* If Flow Director is enabled, set interrupt affinity */
2932 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2933 /* assign the mask for this irq */
2934 irq_set_affinity_hint(entry->vector,
2935 &q_vector->affinity_mask);
2936 }
2937 }
2938
2939 err = request_irq(adapter->msix_entries[vector].vector,
2940 ixgbe_msix_other, 0, netdev->name, adapter);
2941 if (err) {
2942 e_err(probe, "request_irq for msix_other failed: %d\n", err);
2943 goto free_queue_irqs;
2944 }
2945
2946 return 0;
2947
2948 free_queue_irqs:
2949 while (vector) {
2950 vector--;
2951 irq_set_affinity_hint(adapter->msix_entries[vector].vector,
2952 NULL);
2953 free_irq(adapter->msix_entries[vector].vector,
2954 adapter->q_vector[vector]);
2955 }
2956 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2957 pci_disable_msix(adapter->pdev);
2958 kfree(adapter->msix_entries);
2959 adapter->msix_entries = NULL;
2960 return err;
2961 }
2962
2963 /**
2964 * ixgbe_intr - legacy mode Interrupt Handler
2965 * @irq: interrupt number
2966 * @data: pointer to a network interface device structure
2967 **/
2968 static irqreturn_t ixgbe_intr(int irq, void *data)
2969 {
2970 struct ixgbe_adapter *adapter = data;
2971 struct ixgbe_hw *hw = &adapter->hw;
2972 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2973 u32 eicr;
2974
2975 /*
2976 * Workaround for silicon errata #26 on 82598. Mask the interrupt
2977 * before the read of EICR.
2978 */
2979 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2980
2981 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2982 * therefore no explicit interrupt disable is necessary */
2983 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2984 if (!eicr) {
2985 /*
2986 * shared interrupt alert!
2987 * make sure interrupts are enabled because the read will
2988 * have disabled interrupts due to EIAM
2989 * finish the workaround of silicon errata on 82598. Unmask
2990 * the interrupt that we masked before the EICR read.
2991 */
2992 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2993 ixgbe_irq_enable(adapter, true, true);
2994 return IRQ_NONE; /* Not our interrupt */
2995 }
2996
2997 if (eicr & IXGBE_EICR_LSC)
2998 ixgbe_check_lsc(adapter);
2999
3000 switch (hw->mac.type) {
3001 case ixgbe_mac_82599EB:
3002 ixgbe_check_sfp_event(adapter, eicr);
3003 /* Fall through */
3004 case ixgbe_mac_X540:
3005 case ixgbe_mac_X550:
3006 case ixgbe_mac_X550EM_x:
3007 case ixgbe_mac_x550em_a:
3008 if (eicr & IXGBE_EICR_ECC) {
3009 e_info(link, "Received ECC Err, initiating reset\n");
3010 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
3011 ixgbe_service_event_schedule(adapter);
3012 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_ECC);
3013 }
3014 ixgbe_check_overtemp_event(adapter, eicr);
3015 break;
3016 default:
3017 break;
3018 }
3019
3020 ixgbe_check_fan_failure(adapter, eicr);
3021 if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
3022 ixgbe_ptp_check_pps_event(adapter);
3023
3024 /* would disable interrupts here but EIAM disabled it */
3025 napi_schedule_irqoff(&q_vector->napi);
3026
3027 /*
3028 * re-enable link(maybe) and non-queue interrupts, no flush.
3029 * ixgbe_poll will re-enable the queue interrupts
3030 */
3031 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3032 ixgbe_irq_enable(adapter, false, false);
3033
3034 return IRQ_HANDLED;
3035 }
3036
3037 /**
3038 * ixgbe_request_irq - initialize interrupts
3039 * @adapter: board private structure
3040 *
3041 * Attempts to configure interrupts using the best available
3042 * capabilities of the hardware and kernel.
3043 **/
3044 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
3045 {
3046 struct net_device *netdev = adapter->netdev;
3047 int err;
3048
3049 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3050 err = ixgbe_request_msix_irqs(adapter);
3051 else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED)
3052 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
3053 netdev->name, adapter);
3054 else
3055 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
3056 netdev->name, adapter);
3057
3058 if (err)
3059 e_err(probe, "request_irq failed, Error %d\n", err);
3060
3061 return err;
3062 }
3063
3064 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
3065 {
3066 int vector;
3067
3068 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
3069 free_irq(adapter->pdev->irq, adapter);
3070 return;
3071 }
3072
3073 for (vector = 0; vector < adapter->num_q_vectors; vector++) {
3074 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
3075 struct msix_entry *entry = &adapter->msix_entries[vector];
3076
3077 /* free only the irqs that were actually requested */
3078 if (!q_vector->rx.ring && !q_vector->tx.ring)
3079 continue;
3080
3081 /* clear the affinity_mask in the IRQ descriptor */
3082 irq_set_affinity_hint(entry->vector, NULL);
3083
3084 free_irq(entry->vector, q_vector);
3085 }
3086
3087 free_irq(adapter->msix_entries[vector++].vector, adapter);
3088 }
3089
3090 /**
3091 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
3092 * @adapter: board private structure
3093 **/
3094 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
3095 {
3096 switch (adapter->hw.mac.type) {
3097 case ixgbe_mac_82598EB:
3098 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
3099 break;
3100 case ixgbe_mac_82599EB:
3101 case ixgbe_mac_X540:
3102 case ixgbe_mac_X550:
3103 case ixgbe_mac_X550EM_x:
3104 case ixgbe_mac_x550em_a:
3105 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
3106 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
3107 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
3108 break;
3109 default:
3110 break;
3111 }
3112 IXGBE_WRITE_FLUSH(&adapter->hw);
3113 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3114 int vector;
3115
3116 for (vector = 0; vector < adapter->num_q_vectors; vector++)
3117 synchronize_irq(adapter->msix_entries[vector].vector);
3118
3119 synchronize_irq(adapter->msix_entries[vector++].vector);
3120 } else {
3121 synchronize_irq(adapter->pdev->irq);
3122 }
3123 }
3124
3125 /**
3126 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
3127 *
3128 **/
3129 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
3130 {
3131 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
3132
3133 ixgbe_write_eitr(q_vector);
3134
3135 ixgbe_set_ivar(adapter, 0, 0, 0);
3136 ixgbe_set_ivar(adapter, 1, 0, 0);
3137
3138 e_info(hw, "Legacy interrupt IVAR setup done\n");
3139 }
3140
3141 /**
3142 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
3143 * @adapter: board private structure
3144 * @ring: structure containing ring specific data
3145 *
3146 * Configure the Tx descriptor ring after a reset.
3147 **/
3148 void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
3149 struct ixgbe_ring *ring)
3150 {
3151 struct ixgbe_hw *hw = &adapter->hw;
3152 u64 tdba = ring->dma;
3153 int wait_loop = 10;
3154 u32 txdctl = IXGBE_TXDCTL_ENABLE;
3155 u8 reg_idx = ring->reg_idx;
3156
3157 /* disable queue to avoid issues while updating state */
3158 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), 0);
3159 IXGBE_WRITE_FLUSH(hw);
3160
3161 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
3162 (tdba & DMA_BIT_MASK(32)));
3163 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
3164 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
3165 ring->count * sizeof(union ixgbe_adv_tx_desc));
3166 IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
3167 IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
3168 ring->tail = adapter->io_addr + IXGBE_TDT(reg_idx);
3169
3170 /*
3171 * set WTHRESH to encourage burst writeback, it should not be set
3172 * higher than 1 when:
3173 * - ITR is 0 as it could cause false TX hangs
3174 * - ITR is set to > 100k int/sec and BQL is enabled
3175 *
3176 * In order to avoid issues WTHRESH + PTHRESH should always be equal
3177 * to or less than the number of on chip descriptors, which is
3178 * currently 40.
3179 */
3180 if (!ring->q_vector || (ring->q_vector->itr < IXGBE_100K_ITR))
3181 txdctl |= 1u << 16; /* WTHRESH = 1 */
3182 else
3183 txdctl |= 8u << 16; /* WTHRESH = 8 */
3184
3185 /*
3186 * Setting PTHRESH to 32 both improves performance
3187 * and avoids a TX hang with DFP enabled
3188 */
3189 txdctl |= (1u << 8) | /* HTHRESH = 1 */
3190 32; /* PTHRESH = 32 */
3191
3192 /* reinitialize flowdirector state */
3193 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3194 ring->atr_sample_rate = adapter->atr_sample_rate;
3195 ring->atr_count = 0;
3196 set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state);
3197 } else {
3198 ring->atr_sample_rate = 0;
3199 }
3200
3201 /* initialize XPS */
3202 if (!test_and_set_bit(__IXGBE_TX_XPS_INIT_DONE, &ring->state)) {
3203 struct ixgbe_q_vector *q_vector = ring->q_vector;
3204
3205 if (q_vector)
3206 netif_set_xps_queue(ring->netdev,
3207 &q_vector->affinity_mask,
3208 ring->queue_index);
3209 }
3210
3211 clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state);
3212
3213 /* enable queue */
3214 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
3215
3216 /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
3217 if (hw->mac.type == ixgbe_mac_82598EB &&
3218 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3219 return;
3220
3221 /* poll to verify queue is enabled */
3222 do {
3223 usleep_range(1000, 2000);
3224 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
3225 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
3226 if (!wait_loop)
3227 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx);
3228 }
3229
3230 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
3231 {
3232 struct ixgbe_hw *hw = &adapter->hw;
3233 u32 rttdcs, mtqc;
3234 u8 tcs = netdev_get_num_tc(adapter->netdev);
3235
3236 if (hw->mac.type == ixgbe_mac_82598EB)
3237 return;
3238
3239 /* disable the arbiter while setting MTQC */
3240 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
3241 rttdcs |= IXGBE_RTTDCS_ARBDIS;
3242 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
3243
3244 /* set transmit pool layout */
3245 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3246 mtqc = IXGBE_MTQC_VT_ENA;
3247 if (tcs > 4)
3248 mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
3249 else if (tcs > 1)
3250 mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
3251 else if (adapter->ring_feature[RING_F_RSS].indices == 4)
3252 mtqc |= IXGBE_MTQC_32VF;
3253 else
3254 mtqc |= IXGBE_MTQC_64VF;
3255 } else {
3256 if (tcs > 4)
3257 mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
3258 else if (tcs > 1)
3259 mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
3260 else
3261 mtqc = IXGBE_MTQC_64Q_1PB;
3262 }
3263
3264 IXGBE_WRITE_REG(hw, IXGBE_MTQC, mtqc);
3265
3266 /* Enable Security TX Buffer IFG for multiple pb */
3267 if (tcs) {
3268 u32 sectx = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);
3269 sectx |= IXGBE_SECTX_DCB;
3270 IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, sectx);
3271 }
3272
3273 /* re-enable the arbiter */
3274 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
3275 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
3276 }
3277
3278 /**
3279 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
3280 * @adapter: board private structure
3281 *
3282 * Configure the Tx unit of the MAC after a reset.
3283 **/
3284 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
3285 {
3286 struct ixgbe_hw *hw = &adapter->hw;
3287 u32 dmatxctl;
3288 u32 i;
3289
3290 ixgbe_setup_mtqc(adapter);
3291
3292 if (hw->mac.type != ixgbe_mac_82598EB) {
3293 /* DMATXCTL.EN must be before Tx queues are enabled */
3294 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
3295 dmatxctl |= IXGBE_DMATXCTL_TE;
3296 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
3297 }
3298
3299 /* Setup the HW Tx Head and Tail descriptor pointers */
3300 for (i = 0; i < adapter->num_tx_queues; i++)
3301 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
3302 }
3303
3304 static void ixgbe_enable_rx_drop(struct ixgbe_adapter *adapter,
3305 struct ixgbe_ring *ring)
3306 {
3307 struct ixgbe_hw *hw = &adapter->hw;
3308 u8 reg_idx = ring->reg_idx;
3309 u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
3310
3311 srrctl |= IXGBE_SRRCTL_DROP_EN;
3312
3313 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3314 }
3315
3316 static void ixgbe_disable_rx_drop(struct ixgbe_adapter *adapter,
3317 struct ixgbe_ring *ring)
3318 {
3319 struct ixgbe_hw *hw = &adapter->hw;
3320 u8 reg_idx = ring->reg_idx;
3321 u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
3322
3323 srrctl &= ~IXGBE_SRRCTL_DROP_EN;
3324
3325 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3326 }
3327
3328 #ifdef CONFIG_IXGBE_DCB
3329 void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
3330 #else
3331 static void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
3332 #endif
3333 {
3334 int i;
3335 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
3336
3337 if (adapter->ixgbe_ieee_pfc)
3338 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
3339
3340 /*
3341 * We should set the drop enable bit if:
3342 * SR-IOV is enabled
3343 * or
3344 * Number of Rx queues > 1 and flow control is disabled
3345 *
3346 * This allows us to avoid head of line blocking for security
3347 * and performance reasons.
3348 */
3349 if (adapter->num_vfs || (adapter->num_rx_queues > 1 &&
3350 !(adapter->hw.fc.current_mode & ixgbe_fc_tx_pause) && !pfc_en)) {
3351 for (i = 0; i < adapter->num_rx_queues; i++)
3352 ixgbe_enable_rx_drop(adapter, adapter->rx_ring[i]);
3353 } else {
3354 for (i = 0; i < adapter->num_rx_queues; i++)
3355 ixgbe_disable_rx_drop(adapter, adapter->rx_ring[i]);
3356 }
3357 }
3358
3359 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
3360
3361 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
3362 struct ixgbe_ring *rx_ring)
3363 {
3364 struct ixgbe_hw *hw = &adapter->hw;
3365 u32 srrctl;
3366 u8 reg_idx = rx_ring->reg_idx;
3367
3368 if (hw->mac.type == ixgbe_mac_82598EB) {
3369 u16 mask = adapter->ring_feature[RING_F_RSS].mask;
3370
3371 /*
3372 * if VMDq is not active we must program one srrctl register
3373 * per RSS queue since we have enabled RDRXCTL.MVMEN
3374 */
3375 reg_idx &= mask;
3376 }
3377
3378 /* configure header buffer length, needed for RSC */
3379 srrctl = IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;
3380
3381 /* configure the packet buffer length */
3382 srrctl |= ixgbe_rx_bufsz(rx_ring) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
3383
3384 /* configure descriptor type */
3385 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
3386
3387 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3388 }
3389
3390 /**
3391 * ixgbe_rss_indir_tbl_entries - Return RSS indirection table entries
3392 * @adapter: device handle
3393 *
3394 * - 82598/82599/X540: 128
3395 * - X550(non-SRIOV mode): 512
3396 * - X550(SRIOV mode): 64
3397 */
3398 u32 ixgbe_rss_indir_tbl_entries(struct ixgbe_adapter *adapter)
3399 {
3400 if (adapter->hw.mac.type < ixgbe_mac_X550)
3401 return 128;
3402 else if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3403 return 64;
3404 else
3405 return 512;
3406 }
3407
3408 /**
3409 * ixgbe_store_reta - Write the RETA table to HW
3410 * @adapter: device handle
3411 *
3412 * Write the RSS redirection table stored in adapter.rss_indir_tbl[] to HW.
3413 */
3414 void ixgbe_store_reta(struct ixgbe_adapter *adapter)
3415 {
3416 u32 i, reta_entries = ixgbe_rss_indir_tbl_entries(adapter);
3417 struct ixgbe_hw *hw = &adapter->hw;
3418 u32 reta = 0;
3419 u32 indices_multi;
3420 u8 *indir_tbl = adapter->rss_indir_tbl;
3421
3422 /* Fill out the redirection table as follows:
3423 * - 82598: 8 bit wide entries containing pair of 4 bit RSS
3424 * indices.
3425 * - 82599/X540: 8 bit wide entries containing 4 bit RSS index
3426 * - X550: 8 bit wide entries containing 6 bit RSS index
3427 */
3428 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
3429 indices_multi = 0x11;
3430 else
3431 indices_multi = 0x1;
3432
3433 /* Write redirection table to HW */
3434 for (i = 0; i < reta_entries; i++) {
3435 reta |= indices_multi * indir_tbl[i] << (i & 0x3) * 8;
3436 if ((i & 3) == 3) {
3437 if (i < 128)
3438 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
3439 else
3440 IXGBE_WRITE_REG(hw, IXGBE_ERETA((i >> 2) - 32),
3441 reta);
3442 reta = 0;
3443 }
3444 }
3445 }
3446
3447 /**
3448 * ixgbe_store_vfreta - Write the RETA table to HW (x550 devices in SRIOV mode)
3449 * @adapter: device handle
3450 *
3451 * Write the RSS redirection table stored in adapter.rss_indir_tbl[] to HW.
3452 */
3453 static void ixgbe_store_vfreta(struct ixgbe_adapter *adapter)
3454 {
3455 u32 i, reta_entries = ixgbe_rss_indir_tbl_entries(adapter);
3456 struct ixgbe_hw *hw = &adapter->hw;
3457 u32 vfreta = 0;
3458 unsigned int pf_pool = adapter->num_vfs;
3459
3460 /* Write redirection table to HW */
3461 for (i = 0; i < reta_entries; i++) {
3462 vfreta |= (u32)adapter->rss_indir_tbl[i] << (i & 0x3) * 8;
3463 if ((i & 3) == 3) {
3464 IXGBE_WRITE_REG(hw, IXGBE_PFVFRETA(i >> 2, pf_pool),
3465 vfreta);
3466 vfreta = 0;
3467 }
3468 }
3469 }
3470
3471 static void ixgbe_setup_reta(struct ixgbe_adapter *adapter)
3472 {
3473 struct ixgbe_hw *hw = &adapter->hw;
3474 u32 i, j;
3475 u32 reta_entries = ixgbe_rss_indir_tbl_entries(adapter);
3476 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;
3477
3478 /* Program table for at least 2 queues w/ SR-IOV so that VFs can
3479 * make full use of any rings they may have. We will use the
3480 * PSRTYPE register to control how many rings we use within the PF.
3481 */
3482 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) && (rss_i < 2))
3483 rss_i = 2;
3484
3485 /* Fill out hash function seeds */
3486 for (i = 0; i < 10; i++)
3487 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), adapter->rss_key[i]);
3488
3489 /* Fill out redirection table */
3490 memset(adapter->rss_indir_tbl, 0, sizeof(adapter->rss_indir_tbl));
3491
3492 for (i = 0, j = 0; i < reta_entries; i++, j++) {
3493 if (j == rss_i)
3494 j = 0;
3495
3496 adapter->rss_indir_tbl[i] = j;
3497 }
3498
3499 ixgbe_store_reta(adapter);
3500 }
3501
3502 static void ixgbe_setup_vfreta(struct ixgbe_adapter *adapter)
3503 {
3504 struct ixgbe_hw *hw = &adapter->hw;
3505 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;
3506 unsigned int pf_pool = adapter->num_vfs;
3507 int i, j;
3508
3509 /* Fill out hash function seeds */
3510 for (i = 0; i < 10; i++)
3511 IXGBE_WRITE_REG(hw, IXGBE_PFVFRSSRK(i, pf_pool),
3512 adapter->rss_key[i]);
3513
3514 /* Fill out the redirection table */
3515 for (i = 0, j = 0; i < 64; i++, j++) {
3516 if (j == rss_i)
3517 j = 0;
3518
3519 adapter->rss_indir_tbl[i] = j;
3520 }
3521
3522 ixgbe_store_vfreta(adapter);
3523 }
3524
3525 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
3526 {
3527 struct ixgbe_hw *hw = &adapter->hw;
3528 u32 mrqc = 0, rss_field = 0, vfmrqc = 0;
3529 u32 rxcsum;
3530
3531 /* Disable indicating checksum in descriptor, enables RSS hash */
3532 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
3533 rxcsum |= IXGBE_RXCSUM_PCSD;
3534 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
3535
3536 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
3537 if (adapter->ring_feature[RING_F_RSS].mask)
3538 mrqc = IXGBE_MRQC_RSSEN;
3539 } else {
3540 u8 tcs = netdev_get_num_tc(adapter->netdev);
3541
3542 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3543 if (tcs > 4)
3544 mrqc = IXGBE_MRQC_VMDQRT8TCEN; /* 8 TCs */
3545 else if (tcs > 1)
3546 mrqc = IXGBE_MRQC_VMDQRT4TCEN; /* 4 TCs */
3547 else if (adapter->ring_feature[RING_F_RSS].indices == 4)
3548 mrqc = IXGBE_MRQC_VMDQRSS32EN;
3549 else
3550 mrqc = IXGBE_MRQC_VMDQRSS64EN;
3551 } else {
3552 if (tcs > 4)
3553 mrqc = IXGBE_MRQC_RTRSS8TCEN;
3554 else if (tcs > 1)
3555 mrqc = IXGBE_MRQC_RTRSS4TCEN;
3556 else
3557 mrqc = IXGBE_MRQC_RSSEN;
3558 }
3559 }
3560
3561 /* Perform hash on these packet types */
3562 rss_field |= IXGBE_MRQC_RSS_FIELD_IPV4 |
3563 IXGBE_MRQC_RSS_FIELD_IPV4_TCP |
3564 IXGBE_MRQC_RSS_FIELD_IPV6 |
3565 IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
3566
3567 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV4_UDP)
3568 rss_field |= IXGBE_MRQC_RSS_FIELD_IPV4_UDP;
3569 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV6_UDP)
3570 rss_field |= IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
3571
3572 netdev_rss_key_fill(adapter->rss_key, sizeof(adapter->rss_key));
3573 if ((hw->mac.type >= ixgbe_mac_X550) &&
3574 (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) {
3575 unsigned int pf_pool = adapter->num_vfs;
3576
3577 /* Enable VF RSS mode */
3578 mrqc |= IXGBE_MRQC_MULTIPLE_RSS;
3579 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
3580
3581 /* Setup RSS through the VF registers */
3582 ixgbe_setup_vfreta(adapter);
3583 vfmrqc = IXGBE_MRQC_RSSEN;
3584 vfmrqc |= rss_field;
3585 IXGBE_WRITE_REG(hw, IXGBE_PFVFMRQC(pf_pool), vfmrqc);
3586 } else {
3587 ixgbe_setup_reta(adapter);
3588 mrqc |= rss_field;
3589 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
3590 }
3591 }
3592
3593 /**
3594 * ixgbe_configure_rscctl - enable RSC for the indicated ring
3595 * @adapter: address of board private structure
3596 * @index: index of ring to set
3597 **/
3598 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
3599 struct ixgbe_ring *ring)
3600 {
3601 struct ixgbe_hw *hw = &adapter->hw;
3602 u32 rscctrl;
3603 u8 reg_idx = ring->reg_idx;
3604
3605 if (!ring_is_rsc_enabled(ring))
3606 return;
3607
3608 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
3609 rscctrl |= IXGBE_RSCCTL_RSCEN;
3610 /*
3611 * we must limit the number of descriptors so that the
3612 * total size of max desc * buf_len is not greater
3613 * than 65536
3614 */
3615 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
3616 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
3617 }
3618
3619 #define IXGBE_MAX_RX_DESC_POLL 10
3620 static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
3621 struct ixgbe_ring *ring)
3622 {
3623 struct ixgbe_hw *hw = &adapter->hw;
3624 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3625 u32 rxdctl;
3626 u8 reg_idx = ring->reg_idx;
3627
3628 if (ixgbe_removed(hw->hw_addr))
3629 return;
3630 /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
3631 if (hw->mac.type == ixgbe_mac_82598EB &&
3632 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3633 return;
3634
3635 do {
3636 usleep_range(1000, 2000);
3637 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3638 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
3639
3640 if (!wait_loop) {
3641 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
3642 "the polling period\n", reg_idx);
3643 }
3644 }
3645
3646 void ixgbe_disable_rx_queue(struct ixgbe_adapter *adapter,
3647 struct ixgbe_ring *ring)
3648 {
3649 struct ixgbe_hw *hw = &adapter->hw;
3650 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3651 u32 rxdctl;
3652 u8 reg_idx = ring->reg_idx;
3653
3654 if (ixgbe_removed(hw->hw_addr))
3655 return;
3656 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3657 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
3658
3659 /* write value back with RXDCTL.ENABLE bit cleared */
3660 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3661
3662 if (hw->mac.type == ixgbe_mac_82598EB &&
3663 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3664 return;
3665
3666 /* the hardware may take up to 100us to really disable the rx queue */
3667 do {
3668 udelay(10);
3669 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3670 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
3671
3672 if (!wait_loop) {
3673 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not cleared within "
3674 "the polling period\n", reg_idx);
3675 }
3676 }
3677
3678 void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
3679 struct ixgbe_ring *ring)
3680 {
3681 struct ixgbe_hw *hw = &adapter->hw;
3682 u64 rdba = ring->dma;
3683 u32 rxdctl;
3684 u8 reg_idx = ring->reg_idx;
3685
3686 /* disable queue to avoid issues while updating state */
3687 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3688 ixgbe_disable_rx_queue(adapter, ring);
3689
3690 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
3691 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
3692 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
3693 ring->count * sizeof(union ixgbe_adv_rx_desc));
3694 /* Force flushing of IXGBE_RDLEN to prevent MDD */
3695 IXGBE_WRITE_FLUSH(hw);
3696
3697 IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
3698 IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
3699 ring->tail = adapter->io_addr + IXGBE_RDT(reg_idx);
3700
3701 ixgbe_configure_srrctl(adapter, ring);
3702 ixgbe_configure_rscctl(adapter, ring);
3703
3704 if (hw->mac.type == ixgbe_mac_82598EB) {
3705 /*
3706 * enable cache line friendly hardware writes:
3707 * PTHRESH=32 descriptors (half the internal cache),
3708 * this also removes ugly rx_no_buffer_count increment
3709 * HTHRESH=4 descriptors (to minimize latency on fetch)
3710 * WTHRESH=8 burst writeback up to two cache lines
3711 */
3712 rxdctl &= ~0x3FFFFF;
3713 rxdctl |= 0x080420;
3714 }
3715
3716 /* enable receive descriptor ring */
3717 rxdctl |= IXGBE_RXDCTL_ENABLE;
3718 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3719
3720 ixgbe_rx_desc_queue_enable(adapter, ring);
3721 ixgbe_alloc_rx_buffers(ring, ixgbe_desc_unused(ring));
3722 }
3723
3724 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
3725 {
3726 struct ixgbe_hw *hw = &adapter->hw;
3727 int rss_i = adapter->ring_feature[RING_F_RSS].indices;
3728 u16 pool;
3729
3730 /* PSRTYPE must be initialized in non 82598 adapters */
3731 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
3732 IXGBE_PSRTYPE_UDPHDR |
3733 IXGBE_PSRTYPE_IPV4HDR |
3734 IXGBE_PSRTYPE_L2HDR |
3735 IXGBE_PSRTYPE_IPV6HDR;
3736
3737 if (hw->mac.type == ixgbe_mac_82598EB)
3738 return;
3739
3740 if (rss_i > 3)
3741 psrtype |= 2u << 29;
3742 else if (rss_i > 1)
3743 psrtype |= 1u << 29;
3744
3745 for_each_set_bit(pool, &adapter->fwd_bitmask, 32)
3746 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(VMDQ_P(pool)), psrtype);
3747 }
3748
3749 static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
3750 {
3751 struct ixgbe_hw *hw = &adapter->hw;
3752 u32 reg_offset, vf_shift;
3753 u32 gcr_ext, vmdctl;
3754 int i;
3755
3756 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
3757 return;
3758
3759 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
3760 vmdctl |= IXGBE_VMD_CTL_VMDQ_EN;
3761 vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
3762 vmdctl |= VMDQ_P(0) << IXGBE_VT_CTL_POOL_SHIFT;
3763 vmdctl |= IXGBE_VT_CTL_REPLEN;
3764 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
3765
3766 vf_shift = VMDQ_P(0) % 32;
3767 reg_offset = (VMDQ_P(0) >= 32) ? 1 : 0;
3768
3769 /* Enable only the PF's pool for Tx/Rx */
3770 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), GENMASK(vf_shift, 31));
3771 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), reg_offset - 1);
3772 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), GENMASK(vf_shift, 31));
3773 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), reg_offset - 1);
3774 if (adapter->bridge_mode == BRIDGE_MODE_VEB)
3775 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
3776
3777 /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
3778 hw->mac.ops.set_vmdq(hw, 0, VMDQ_P(0));
3779
3780 /* clear VLAN promisc flag so VFTA will be updated if necessary */
3781 adapter->flags2 &= ~IXGBE_FLAG2_VLAN_PROMISC;
3782
3783 /*
3784 * Set up VF register offsets for selected VT Mode,
3785 * i.e. 32 or 64 VFs for SR-IOV
3786 */
3787 switch (adapter->ring_feature[RING_F_VMDQ].mask) {
3788 case IXGBE_82599_VMDQ_8Q_MASK:
3789 gcr_ext = IXGBE_GCR_EXT_VT_MODE_16;
3790 break;
3791 case IXGBE_82599_VMDQ_4Q_MASK:
3792 gcr_ext = IXGBE_GCR_EXT_VT_MODE_32;
3793 break;
3794 default:
3795 gcr_ext = IXGBE_GCR_EXT_VT_MODE_64;
3796 break;
3797 }
3798
3799 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
3800
3801 for (i = 0; i < adapter->num_vfs; i++) {
3802 /* configure spoof checking */
3803 ixgbe_ndo_set_vf_spoofchk(adapter->netdev, i,
3804 adapter->vfinfo[i].spoofchk_enabled);
3805
3806 /* Enable/Disable RSS query feature */
3807 ixgbe_ndo_set_vf_rss_query_en(adapter->netdev, i,
3808 adapter->vfinfo[i].rss_query_enabled);
3809 }
3810 }
3811
3812 static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
3813 {
3814 struct ixgbe_hw *hw = &adapter->hw;
3815 struct net_device *netdev = adapter->netdev;
3816 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3817 struct ixgbe_ring *rx_ring;
3818 int i;
3819 u32 mhadd, hlreg0;
3820
3821 #ifdef IXGBE_FCOE
3822 /* adjust max frame to be able to do baby jumbo for FCoE */
3823 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
3824 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
3825 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
3826
3827 #endif /* IXGBE_FCOE */
3828
3829 /* adjust max frame to be at least the size of a standard frame */
3830 if (max_frame < (ETH_FRAME_LEN + ETH_FCS_LEN))
3831 max_frame = (ETH_FRAME_LEN + ETH_FCS_LEN);
3832
3833 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
3834 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
3835 mhadd &= ~IXGBE_MHADD_MFS_MASK;
3836 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
3837
3838 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
3839 }
3840
3841 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
3842 /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
3843 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
3844 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
3845
3846 /*
3847 * Setup the HW Rx Head and Tail Descriptor Pointers and
3848 * the Base and Length of the Rx Descriptor Ring
3849 */
3850 for (i = 0; i < adapter->num_rx_queues; i++) {
3851 rx_ring = adapter->rx_ring[i];
3852 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
3853 set_ring_rsc_enabled(rx_ring);
3854 else
3855 clear_ring_rsc_enabled(rx_ring);
3856 }
3857 }
3858
3859 static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
3860 {
3861 struct ixgbe_hw *hw = &adapter->hw;
3862 u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
3863
3864 switch (hw->mac.type) {
3865 case ixgbe_mac_82598EB:
3866 /*
3867 * For VMDq support of different descriptor types or
3868 * buffer sizes through the use of multiple SRRCTL
3869 * registers, RDRXCTL.MVMEN must be set to 1
3870 *
3871 * also, the manual doesn't mention it clearly but DCA hints
3872 * will only use queue 0's tags unless this bit is set. Side
3873 * effects of setting this bit are only that SRRCTL must be
3874 * fully programmed [0..15]
3875 */
3876 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
3877 break;
3878 case ixgbe_mac_X550:
3879 case ixgbe_mac_X550EM_x:
3880 case ixgbe_mac_x550em_a:
3881 if (adapter->num_vfs)
3882 rdrxctl |= IXGBE_RDRXCTL_PSP;
3883 /* fall through for older HW */
3884 case ixgbe_mac_82599EB:
3885 case ixgbe_mac_X540:
3886 /* Disable RSC for ACK packets */
3887 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
3888 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
3889 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
3890 /* hardware requires some bits to be set by default */
3891 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
3892 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
3893 break;
3894 default:
3895 /* We should do nothing since we don't know this hardware */
3896 return;
3897 }
3898
3899 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
3900 }
3901
3902 /**
3903 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
3904 * @adapter: board private structure
3905 *
3906 * Configure the Rx unit of the MAC after a reset.
3907 **/
3908 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
3909 {
3910 struct ixgbe_hw *hw = &adapter->hw;
3911 int i;
3912 u32 rxctrl, rfctl;
3913
3914 /* disable receives while setting up the descriptors */
3915 hw->mac.ops.disable_rx(hw);
3916
3917 ixgbe_setup_psrtype(adapter);
3918 ixgbe_setup_rdrxctl(adapter);
3919
3920 /* RSC Setup */
3921 rfctl = IXGBE_READ_REG(hw, IXGBE_RFCTL);
3922 rfctl &= ~IXGBE_RFCTL_RSC_DIS;
3923 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
3924 rfctl |= IXGBE_RFCTL_RSC_DIS;
3925 IXGBE_WRITE_REG(hw, IXGBE_RFCTL, rfctl);
3926
3927 /* Program registers for the distribution of queues */
3928 ixgbe_setup_mrqc(adapter);
3929
3930 /* set_rx_buffer_len must be called before ring initialization */
3931 ixgbe_set_rx_buffer_len(adapter);
3932
3933 /*
3934 * Setup the HW Rx Head and Tail Descriptor Pointers and
3935 * the Base and Length of the Rx Descriptor Ring
3936 */
3937 for (i = 0; i < adapter->num_rx_queues; i++)
3938 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
3939
3940 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3941 /* disable drop enable for 82598 parts */
3942 if (hw->mac.type == ixgbe_mac_82598EB)
3943 rxctrl |= IXGBE_RXCTRL_DMBYPS;
3944
3945 /* enable all receives */
3946 rxctrl |= IXGBE_RXCTRL_RXEN;
3947 hw->mac.ops.enable_rx_dma(hw, rxctrl);
3948 }
3949
3950 static int ixgbe_vlan_rx_add_vid(struct net_device *netdev,
3951 __be16 proto, u16 vid)
3952 {
3953 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3954 struct ixgbe_hw *hw = &adapter->hw;
3955
3956 /* add VID to filter table */
3957 if (!vid || !(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
3958 hw->mac.ops.set_vfta(&adapter->hw, vid, VMDQ_P(0), true, !!vid);
3959
3960 set_bit(vid, adapter->active_vlans);
3961
3962 return 0;
3963 }
3964
3965 static int ixgbe_find_vlvf_entry(struct ixgbe_hw *hw, u32 vlan)
3966 {
3967 u32 vlvf;
3968 int idx;
3969
3970 /* short cut the special case */
3971 if (vlan == 0)
3972 return 0;
3973
3974 /* Search for the vlan id in the VLVF entries */
3975 for (idx = IXGBE_VLVF_ENTRIES; --idx;) {
3976 vlvf = IXGBE_READ_REG(hw, IXGBE_VLVF(idx));
3977 if ((vlvf & VLAN_VID_MASK) == vlan)
3978 break;
3979 }
3980
3981 return idx;
3982 }
3983
3984 void ixgbe_update_pf_promisc_vlvf(struct ixgbe_adapter *adapter, u32 vid)
3985 {
3986 struct ixgbe_hw *hw = &adapter->hw;
3987 u32 bits, word;
3988 int idx;
3989
3990 idx = ixgbe_find_vlvf_entry(hw, vid);
3991 if (!idx)
3992 return;
3993
3994 /* See if any other pools are set for this VLAN filter
3995 * entry other than the PF.
3996 */
3997 word = idx * 2 + (VMDQ_P(0) / 32);
3998 bits = ~BIT(VMDQ_P(0) % 32);
3999 bits &= IXGBE_READ_REG(hw, IXGBE_VLVFB(word));
4000
4001 /* Disable the filter so this falls into the default pool. */
4002 if (!bits && !IXGBE_READ_REG(hw, IXGBE_VLVFB(word ^ 1))) {
4003 if (!(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
4004 IXGBE_WRITE_REG(hw, IXGBE_VLVFB(word), 0);
4005 IXGBE_WRITE_REG(hw, IXGBE_VLVF(idx), 0);
4006 }
4007 }
4008
4009 static int ixgbe_vlan_rx_kill_vid(struct net_device *netdev,
4010 __be16 proto, u16 vid)
4011 {
4012 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4013 struct ixgbe_hw *hw = &adapter->hw;
4014
4015 /* remove VID from filter table */
4016 if (vid && !(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
4017 hw->mac.ops.set_vfta(hw, vid, VMDQ_P(0), false, true);
4018
4019 clear_bit(vid, adapter->active_vlans);
4020
4021 return 0;
4022 }
4023
4024 /**
4025 * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping
4026 * @adapter: driver data
4027 */
4028 static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
4029 {
4030 struct ixgbe_hw *hw = &adapter->hw;
4031 u32 vlnctrl;
4032 int i, j;
4033
4034 switch (hw->mac.type) {
4035 case ixgbe_mac_82598EB:
4036 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
4037 vlnctrl &= ~IXGBE_VLNCTRL_VME;
4038 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
4039 break;
4040 case ixgbe_mac_82599EB:
4041 case ixgbe_mac_X540:
4042 case ixgbe_mac_X550:
4043 case ixgbe_mac_X550EM_x:
4044 case ixgbe_mac_x550em_a:
4045 for (i = 0; i < adapter->num_rx_queues; i++) {
4046 struct ixgbe_ring *ring = adapter->rx_ring[i];
4047
4048 if (ring->l2_accel_priv)
4049 continue;
4050 j = ring->reg_idx;
4051 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
4052 vlnctrl &= ~IXGBE_RXDCTL_VME;
4053 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
4054 }
4055 break;
4056 default:
4057 break;
4058 }
4059 }
4060
4061 /**
4062 * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping
4063 * @adapter: driver data
4064 */
4065 static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
4066 {
4067 struct ixgbe_hw *hw = &adapter->hw;
4068 u32 vlnctrl;
4069 int i, j;
4070
4071 switch (hw->mac.type) {
4072 case ixgbe_mac_82598EB:
4073 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
4074 vlnctrl |= IXGBE_VLNCTRL_VME;
4075 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
4076 break;
4077 case ixgbe_mac_82599EB:
4078 case ixgbe_mac_X540:
4079 case ixgbe_mac_X550:
4080 case ixgbe_mac_X550EM_x:
4081 case ixgbe_mac_x550em_a:
4082 for (i = 0; i < adapter->num_rx_queues; i++) {
4083 struct ixgbe_ring *ring = adapter->rx_ring[i];
4084
4085 if (ring->l2_accel_priv)
4086 continue;
4087 j = ring->reg_idx;
4088 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
4089 vlnctrl |= IXGBE_RXDCTL_VME;
4090 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
4091 }
4092 break;
4093 default:
4094 break;
4095 }
4096 }
4097
4098 static void ixgbe_vlan_promisc_enable(struct ixgbe_adapter *adapter)
4099 {
4100 struct ixgbe_hw *hw = &adapter->hw;
4101 u32 vlnctrl, i;
4102
4103 switch (hw->mac.type) {
4104 case ixgbe_mac_82599EB:
4105 case ixgbe_mac_X540:
4106 case ixgbe_mac_X550:
4107 case ixgbe_mac_X550EM_x:
4108 case ixgbe_mac_x550em_a:
4109 default:
4110 if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED)
4111 break;
4112 /* fall through */
4113 case ixgbe_mac_82598EB:
4114 /* legacy case, we can just disable VLAN filtering */
4115 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
4116 vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
4117 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
4118 return;
4119 }
4120
4121 /* We are already in VLAN promisc, nothing to do */
4122 if (adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC)
4123 return;
4124
4125 /* Set flag so we don't redo unnecessary work */
4126 adapter->flags2 |= IXGBE_FLAG2_VLAN_PROMISC;
4127
4128 /* Add PF to all active pools */
4129 for (i = IXGBE_VLVF_ENTRIES; --i;) {
4130 u32 reg_offset = IXGBE_VLVFB(i * 2 + VMDQ_P(0) / 32);
4131 u32 vlvfb = IXGBE_READ_REG(hw, reg_offset);
4132
4133 vlvfb |= BIT(VMDQ_P(0) % 32);
4134 IXGBE_WRITE_REG(hw, reg_offset, vlvfb);
4135 }
4136
4137 /* Set all bits in the VLAN filter table array */
4138 for (i = hw->mac.vft_size; i--;)
4139 IXGBE_WRITE_REG(hw, IXGBE_VFTA(i), ~0U);
4140 }
4141
4142 #define VFTA_BLOCK_SIZE 8
4143 static void ixgbe_scrub_vfta(struct ixgbe_adapter *adapter, u32 vfta_offset)
4144 {
4145 struct ixgbe_hw *hw = &adapter->hw;
4146 u32 vfta[VFTA_BLOCK_SIZE] = { 0 };
4147 u32 vid_start = vfta_offset * 32;
4148 u32 vid_end = vid_start + (VFTA_BLOCK_SIZE * 32);
4149 u32 i, vid, word, bits;
4150
4151 for (i = IXGBE_VLVF_ENTRIES; --i;) {
4152 u32 vlvf = IXGBE_READ_REG(hw, IXGBE_VLVF(i));
4153
4154 /* pull VLAN ID from VLVF */
4155 vid = vlvf & VLAN_VID_MASK;
4156
4157 /* only concern outselves with a certain range */
4158 if (vid < vid_start || vid >= vid_end)
4159 continue;
4160
4161 if (vlvf) {
4162 /* record VLAN ID in VFTA */
4163 vfta[(vid - vid_start) / 32] |= BIT(vid % 32);
4164
4165 /* if PF is part of this then continue */
4166 if (test_bit(vid, adapter->active_vlans))
4167 continue;
4168 }
4169
4170 /* remove PF from the pool */
4171 word = i * 2 + VMDQ_P(0) / 32;
4172 bits = ~BIT(VMDQ_P(0) % 32);
4173 bits &= IXGBE_READ_REG(hw, IXGBE_VLVFB(word));
4174 IXGBE_WRITE_REG(hw, IXGBE_VLVFB(word), bits);
4175 }
4176
4177 /* extract values from active_vlans and write back to VFTA */
4178 for (i = VFTA_BLOCK_SIZE; i--;) {
4179 vid = (vfta_offset + i) * 32;
4180 word = vid / BITS_PER_LONG;
4181 bits = vid % BITS_PER_LONG;
4182
4183 vfta[i] |= adapter->active_vlans[word] >> bits;
4184
4185 IXGBE_WRITE_REG(hw, IXGBE_VFTA(vfta_offset + i), vfta[i]);
4186 }
4187 }
4188
4189 static void ixgbe_vlan_promisc_disable(struct ixgbe_adapter *adapter)
4190 {
4191 struct ixgbe_hw *hw = &adapter->hw;
4192 u32 vlnctrl, i;
4193
4194 switch (hw->mac.type) {
4195 case ixgbe_mac_82599EB:
4196 case ixgbe_mac_X540:
4197 case ixgbe_mac_X550:
4198 case ixgbe_mac_X550EM_x:
4199 case ixgbe_mac_x550em_a:
4200 default:
4201 if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED)
4202 break;
4203 /* fall through */
4204 case ixgbe_mac_82598EB:
4205 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
4206 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
4207 vlnctrl |= IXGBE_VLNCTRL_VFE;
4208 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
4209 return;
4210 }
4211
4212 /* We are not in VLAN promisc, nothing to do */
4213 if (!(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
4214 return;
4215
4216 /* Set flag so we don't redo unnecessary work */
4217 adapter->flags2 &= ~IXGBE_FLAG2_VLAN_PROMISC;
4218
4219 for (i = 0; i < hw->mac.vft_size; i += VFTA_BLOCK_SIZE)
4220 ixgbe_scrub_vfta(adapter, i);
4221 }
4222
4223 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
4224 {
4225 u16 vid = 1;
4226
4227 ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0);
4228
4229 for_each_set_bit_from(vid, adapter->active_vlans, VLAN_N_VID)
4230 ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
4231 }
4232
4233 /**
4234 * ixgbe_write_mc_addr_list - write multicast addresses to MTA
4235 * @netdev: network interface device structure
4236 *
4237 * Writes multicast address list to the MTA hash table.
4238 * Returns: -ENOMEM on failure
4239 * 0 on no addresses written
4240 * X on writing X addresses to MTA
4241 **/
4242 static int ixgbe_write_mc_addr_list(struct net_device *netdev)
4243 {
4244 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4245 struct ixgbe_hw *hw = &adapter->hw;
4246
4247 if (!netif_running(netdev))
4248 return 0;
4249
4250 if (hw->mac.ops.update_mc_addr_list)
4251 hw->mac.ops.update_mc_addr_list(hw, netdev);
4252 else
4253 return -ENOMEM;
4254
4255 #ifdef CONFIG_PCI_IOV
4256 ixgbe_restore_vf_multicasts(adapter);
4257 #endif
4258
4259 return netdev_mc_count(netdev);
4260 }
4261
4262 #ifdef CONFIG_PCI_IOV
4263 void ixgbe_full_sync_mac_table(struct ixgbe_adapter *adapter)
4264 {
4265 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4266 struct ixgbe_hw *hw = &adapter->hw;
4267 int i;
4268
4269 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4270 mac_table->state &= ~IXGBE_MAC_STATE_MODIFIED;
4271
4272 if (mac_table->state & IXGBE_MAC_STATE_IN_USE)
4273 hw->mac.ops.set_rar(hw, i,
4274 mac_table->addr,
4275 mac_table->pool,
4276 IXGBE_RAH_AV);
4277 else
4278 hw->mac.ops.clear_rar(hw, i);
4279 }
4280 }
4281
4282 #endif
4283 static void ixgbe_sync_mac_table(struct ixgbe_adapter *adapter)
4284 {
4285 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4286 struct ixgbe_hw *hw = &adapter->hw;
4287 int i;
4288
4289 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4290 if (!(mac_table->state & IXGBE_MAC_STATE_MODIFIED))
4291 continue;
4292
4293 mac_table->state &= ~IXGBE_MAC_STATE_MODIFIED;
4294
4295 if (mac_table->state & IXGBE_MAC_STATE_IN_USE)
4296 hw->mac.ops.set_rar(hw, i,
4297 mac_table->addr,
4298 mac_table->pool,
4299 IXGBE_RAH_AV);
4300 else
4301 hw->mac.ops.clear_rar(hw, i);
4302 }
4303 }
4304
4305 static void ixgbe_flush_sw_mac_table(struct ixgbe_adapter *adapter)
4306 {
4307 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4308 struct ixgbe_hw *hw = &adapter->hw;
4309 int i;
4310
4311 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4312 mac_table->state |= IXGBE_MAC_STATE_MODIFIED;
4313 mac_table->state &= ~IXGBE_MAC_STATE_IN_USE;
4314 }
4315
4316 ixgbe_sync_mac_table(adapter);
4317 }
4318
4319 static int ixgbe_available_rars(struct ixgbe_adapter *adapter, u16 pool)
4320 {
4321 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4322 struct ixgbe_hw *hw = &adapter->hw;
4323 int i, count = 0;
4324
4325 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4326 /* do not count default RAR as available */
4327 if (mac_table->state & IXGBE_MAC_STATE_DEFAULT)
4328 continue;
4329
4330 /* only count unused and addresses that belong to us */
4331 if (mac_table->state & IXGBE_MAC_STATE_IN_USE) {
4332 if (mac_table->pool != pool)
4333 continue;
4334 }
4335
4336 count++;
4337 }
4338
4339 return count;
4340 }
4341
4342 /* this function destroys the first RAR entry */
4343 static void ixgbe_mac_set_default_filter(struct ixgbe_adapter *adapter)
4344 {
4345 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4346 struct ixgbe_hw *hw = &adapter->hw;
4347
4348 memcpy(&mac_table->addr, hw->mac.addr, ETH_ALEN);
4349 mac_table->pool = VMDQ_P(0);
4350
4351 mac_table->state = IXGBE_MAC_STATE_DEFAULT | IXGBE_MAC_STATE_IN_USE;
4352
4353 hw->mac.ops.set_rar(hw, 0, mac_table->addr, mac_table->pool,
4354 IXGBE_RAH_AV);
4355 }
4356
4357 int ixgbe_add_mac_filter(struct ixgbe_adapter *adapter,
4358 const u8 *addr, u16 pool)
4359 {
4360 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4361 struct ixgbe_hw *hw = &adapter->hw;
4362 int i;
4363
4364 if (is_zero_ether_addr(addr))
4365 return -EINVAL;
4366
4367 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4368 if (mac_table->state & IXGBE_MAC_STATE_IN_USE)
4369 continue;
4370
4371 ether_addr_copy(mac_table->addr, addr);
4372 mac_table->pool = pool;
4373
4374 mac_table->state |= IXGBE_MAC_STATE_MODIFIED |
4375 IXGBE_MAC_STATE_IN_USE;
4376
4377 ixgbe_sync_mac_table(adapter);
4378
4379 return i;
4380 }
4381
4382 return -ENOMEM;
4383 }
4384
4385 int ixgbe_del_mac_filter(struct ixgbe_adapter *adapter,
4386 const u8 *addr, u16 pool)
4387 {
4388 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4389 struct ixgbe_hw *hw = &adapter->hw;
4390 int i;
4391
4392 if (is_zero_ether_addr(addr))
4393 return -EINVAL;
4394
4395 /* search table for addr, if found clear IN_USE flag and sync */
4396 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4397 /* we can only delete an entry if it is in use */
4398 if (!(mac_table->state & IXGBE_MAC_STATE_IN_USE))
4399 continue;
4400 /* we only care about entries that belong to the given pool */
4401 if (mac_table->pool != pool)
4402 continue;
4403 /* we only care about a specific MAC address */
4404 if (!ether_addr_equal(addr, mac_table->addr))
4405 continue;
4406
4407 mac_table->state |= IXGBE_MAC_STATE_MODIFIED;
4408 mac_table->state &= ~IXGBE_MAC_STATE_IN_USE;
4409
4410 ixgbe_sync_mac_table(adapter);
4411
4412 return 0;
4413 }
4414
4415 return -ENOMEM;
4416 }
4417 /**
4418 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
4419 * @netdev: network interface device structure
4420 *
4421 * Writes unicast address list to the RAR table.
4422 * Returns: -ENOMEM on failure/insufficient address space
4423 * 0 on no addresses written
4424 * X on writing X addresses to the RAR table
4425 **/
4426 static int ixgbe_write_uc_addr_list(struct net_device *netdev, int vfn)
4427 {
4428 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4429 int count = 0;
4430
4431 /* return ENOMEM indicating insufficient memory for addresses */
4432 if (netdev_uc_count(netdev) > ixgbe_available_rars(adapter, vfn))
4433 return -ENOMEM;
4434
4435 if (!netdev_uc_empty(netdev)) {
4436 struct netdev_hw_addr *ha;
4437 netdev_for_each_uc_addr(ha, netdev) {
4438 ixgbe_del_mac_filter(adapter, ha->addr, vfn);
4439 ixgbe_add_mac_filter(adapter, ha->addr, vfn);
4440 count++;
4441 }
4442 }
4443 return count;
4444 }
4445
4446 static int ixgbe_uc_sync(struct net_device *netdev, const unsigned char *addr)
4447 {
4448 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4449 int ret;
4450
4451 ret = ixgbe_add_mac_filter(adapter, addr, VMDQ_P(0));
4452
4453 return min_t(int, ret, 0);
4454 }
4455
4456 static int ixgbe_uc_unsync(struct net_device *netdev, const unsigned char *addr)
4457 {
4458 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4459
4460 ixgbe_del_mac_filter(adapter, addr, VMDQ_P(0));
4461
4462 return 0;
4463 }
4464
4465 /**
4466 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
4467 * @netdev: network interface device structure
4468 *
4469 * The set_rx_method entry point is called whenever the unicast/multicast
4470 * address list or the network interface flags are updated. This routine is
4471 * responsible for configuring the hardware for proper unicast, multicast and
4472 * promiscuous mode.
4473 **/
4474 void ixgbe_set_rx_mode(struct net_device *netdev)
4475 {
4476 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4477 struct ixgbe_hw *hw = &adapter->hw;
4478 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
4479 netdev_features_t features = netdev->features;
4480 int count;
4481
4482 /* Check for Promiscuous and All Multicast modes */
4483 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4484
4485 /* set all bits that we expect to always be set */
4486 fctrl &= ~IXGBE_FCTRL_SBP; /* disable store-bad-packets */
4487 fctrl |= IXGBE_FCTRL_BAM;
4488 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
4489 fctrl |= IXGBE_FCTRL_PMCF;
4490
4491 /* clear the bits we are changing the status of */
4492 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
4493 if (netdev->flags & IFF_PROMISC) {
4494 hw->addr_ctrl.user_set_promisc = true;
4495 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
4496 vmolr |= IXGBE_VMOLR_MPE;
4497 features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
4498 } else {
4499 if (netdev->flags & IFF_ALLMULTI) {
4500 fctrl |= IXGBE_FCTRL_MPE;
4501 vmolr |= IXGBE_VMOLR_MPE;
4502 }
4503 hw->addr_ctrl.user_set_promisc = false;
4504 }
4505
4506 /*
4507 * Write addresses to available RAR registers, if there is not
4508 * sufficient space to store all the addresses then enable
4509 * unicast promiscuous mode
4510 */
4511 if (__dev_uc_sync(netdev, ixgbe_uc_sync, ixgbe_uc_unsync)) {
4512 fctrl |= IXGBE_FCTRL_UPE;
4513 vmolr |= IXGBE_VMOLR_ROPE;
4514 }
4515
4516 /* Write addresses to the MTA, if the attempt fails
4517 * then we should just turn on promiscuous mode so
4518 * that we can at least receive multicast traffic
4519 */
4520 count = ixgbe_write_mc_addr_list(netdev);
4521 if (count < 0) {
4522 fctrl |= IXGBE_FCTRL_MPE;
4523 vmolr |= IXGBE_VMOLR_MPE;
4524 } else if (count) {
4525 vmolr |= IXGBE_VMOLR_ROMPE;
4526 }
4527
4528 if (hw->mac.type != ixgbe_mac_82598EB) {
4529 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(VMDQ_P(0))) &
4530 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
4531 IXGBE_VMOLR_ROPE);
4532 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(VMDQ_P(0)), vmolr);
4533 }
4534
4535 /* This is useful for sniffing bad packets. */
4536 if (features & NETIF_F_RXALL) {
4537 /* UPE and MPE will be handled by normal PROMISC logic
4538 * in e1000e_set_rx_mode */
4539 fctrl |= (IXGBE_FCTRL_SBP | /* Receive bad packets */
4540 IXGBE_FCTRL_BAM | /* RX All Bcast Pkts */
4541 IXGBE_FCTRL_PMCF); /* RX All MAC Ctrl Pkts */
4542
4543 fctrl &= ~(IXGBE_FCTRL_DPF);
4544 /* NOTE: VLAN filtering is disabled by setting PROMISC */
4545 }
4546
4547 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
4548
4549 if (features & NETIF_F_HW_VLAN_CTAG_RX)
4550 ixgbe_vlan_strip_enable(adapter);
4551 else
4552 ixgbe_vlan_strip_disable(adapter);
4553
4554 if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
4555 ixgbe_vlan_promisc_disable(adapter);
4556 else
4557 ixgbe_vlan_promisc_enable(adapter);
4558 }
4559
4560 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
4561 {
4562 int q_idx;
4563
4564 for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) {
4565 ixgbe_qv_init_lock(adapter->q_vector[q_idx]);
4566 napi_enable(&adapter->q_vector[q_idx]->napi);
4567 }
4568 }
4569
4570 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
4571 {
4572 int q_idx;
4573
4574 for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) {
4575 napi_disable(&adapter->q_vector[q_idx]->napi);
4576 while (!ixgbe_qv_disable(adapter->q_vector[q_idx])) {
4577 pr_info("QV %d locked\n", q_idx);
4578 usleep_range(1000, 20000);
4579 }
4580 }
4581 }
4582
4583 static void ixgbe_clear_vxlan_port(struct ixgbe_adapter *adapter)
4584 {
4585 switch (adapter->hw.mac.type) {
4586 case ixgbe_mac_X550:
4587 case ixgbe_mac_X550EM_x:
4588 case ixgbe_mac_x550em_a:
4589 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VXLANCTRL, 0);
4590 adapter->vxlan_port = 0;
4591 break;
4592 default:
4593 break;
4594 }
4595 }
4596
4597 #ifdef CONFIG_IXGBE_DCB
4598 /**
4599 * ixgbe_configure_dcb - Configure DCB hardware
4600 * @adapter: ixgbe adapter struct
4601 *
4602 * This is called by the driver on open to configure the DCB hardware.
4603 * This is also called by the gennetlink interface when reconfiguring
4604 * the DCB state.
4605 */
4606 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
4607 {
4608 struct ixgbe_hw *hw = &adapter->hw;
4609 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
4610
4611 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
4612 if (hw->mac.type == ixgbe_mac_82598EB)
4613 netif_set_gso_max_size(adapter->netdev, 65536);
4614 return;
4615 }
4616
4617 if (hw->mac.type == ixgbe_mac_82598EB)
4618 netif_set_gso_max_size(adapter->netdev, 32768);
4619
4620 #ifdef IXGBE_FCOE
4621 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
4622 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
4623 #endif
4624
4625 /* reconfigure the hardware */
4626 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE) {
4627 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
4628 DCB_TX_CONFIG);
4629 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
4630 DCB_RX_CONFIG);
4631 ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
4632 } else if (adapter->ixgbe_ieee_ets && adapter->ixgbe_ieee_pfc) {
4633 ixgbe_dcb_hw_ets(&adapter->hw,
4634 adapter->ixgbe_ieee_ets,
4635 max_frame);
4636 ixgbe_dcb_hw_pfc_config(&adapter->hw,
4637 adapter->ixgbe_ieee_pfc->pfc_en,
4638 adapter->ixgbe_ieee_ets->prio_tc);
4639 }
4640
4641 /* Enable RSS Hash per TC */
4642 if (hw->mac.type != ixgbe_mac_82598EB) {
4643 u32 msb = 0;
4644 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices - 1;
4645
4646 while (rss_i) {
4647 msb++;
4648 rss_i >>= 1;
4649 }
4650
4651 /* write msb to all 8 TCs in one write */
4652 IXGBE_WRITE_REG(hw, IXGBE_RQTC, msb * 0x11111111);
4653 }
4654 }
4655 #endif
4656
4657 /* Additional bittime to account for IXGBE framing */
4658 #define IXGBE_ETH_FRAMING 20
4659
4660 /**
4661 * ixgbe_hpbthresh - calculate high water mark for flow control
4662 *
4663 * @adapter: board private structure to calculate for
4664 * @pb: packet buffer to calculate
4665 */
4666 static int ixgbe_hpbthresh(struct ixgbe_adapter *adapter, int pb)
4667 {
4668 struct ixgbe_hw *hw = &adapter->hw;
4669 struct net_device *dev = adapter->netdev;
4670 int link, tc, kb, marker;
4671 u32 dv_id, rx_pba;
4672
4673 /* Calculate max LAN frame size */
4674 tc = link = dev->mtu + ETH_HLEN + ETH_FCS_LEN + IXGBE_ETH_FRAMING;
4675
4676 #ifdef IXGBE_FCOE
4677 /* FCoE traffic class uses FCOE jumbo frames */
4678 if ((dev->features & NETIF_F_FCOE_MTU) &&
4679 (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
4680 (pb == ixgbe_fcoe_get_tc(adapter)))
4681 tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
4682 #endif
4683
4684 /* Calculate delay value for device */
4685 switch (hw->mac.type) {
4686 case ixgbe_mac_X540:
4687 case ixgbe_mac_X550:
4688 case ixgbe_mac_X550EM_x:
4689 case ixgbe_mac_x550em_a:
4690 dv_id = IXGBE_DV_X540(link, tc);
4691 break;
4692 default:
4693 dv_id = IXGBE_DV(link, tc);
4694 break;
4695 }
4696
4697 /* Loopback switch introduces additional latency */
4698 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4699 dv_id += IXGBE_B2BT(tc);
4700
4701 /* Delay value is calculated in bit times convert to KB */
4702 kb = IXGBE_BT2KB(dv_id);
4703 rx_pba = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(pb)) >> 10;
4704
4705 marker = rx_pba - kb;
4706
4707 /* It is possible that the packet buffer is not large enough
4708 * to provide required headroom. In this case throw an error
4709 * to user and a do the best we can.
4710 */
4711 if (marker < 0) {
4712 e_warn(drv, "Packet Buffer(%i) can not provide enough"
4713 "headroom to support flow control."
4714 "Decrease MTU or number of traffic classes\n", pb);
4715 marker = tc + 1;
4716 }
4717
4718 return marker;
4719 }
4720
4721 /**
4722 * ixgbe_lpbthresh - calculate low water mark for for flow control
4723 *
4724 * @adapter: board private structure to calculate for
4725 * @pb: packet buffer to calculate
4726 */
4727 static int ixgbe_lpbthresh(struct ixgbe_adapter *adapter, int pb)
4728 {
4729 struct ixgbe_hw *hw = &adapter->hw;
4730 struct net_device *dev = adapter->netdev;
4731 int tc;
4732 u32 dv_id;
4733
4734 /* Calculate max LAN frame size */
4735 tc = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
4736
4737 #ifdef IXGBE_FCOE
4738 /* FCoE traffic class uses FCOE jumbo frames */
4739 if ((dev->features & NETIF_F_FCOE_MTU) &&
4740 (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
4741 (pb == netdev_get_prio_tc_map(dev, adapter->fcoe.up)))
4742 tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
4743 #endif
4744
4745 /* Calculate delay value for device */
4746 switch (hw->mac.type) {
4747 case ixgbe_mac_X540:
4748 case ixgbe_mac_X550:
4749 case ixgbe_mac_X550EM_x:
4750 case ixgbe_mac_x550em_a:
4751 dv_id = IXGBE_LOW_DV_X540(tc);
4752 break;
4753 default:
4754 dv_id = IXGBE_LOW_DV(tc);
4755 break;
4756 }
4757
4758 /* Delay value is calculated in bit times convert to KB */
4759 return IXGBE_BT2KB(dv_id);
4760 }
4761
4762 /*
4763 * ixgbe_pbthresh_setup - calculate and setup high low water marks
4764 */
4765 static void ixgbe_pbthresh_setup(struct ixgbe_adapter *adapter)
4766 {
4767 struct ixgbe_hw *hw = &adapter->hw;
4768 int num_tc = netdev_get_num_tc(adapter->netdev);
4769 int i;
4770
4771 if (!num_tc)
4772 num_tc = 1;
4773
4774 for (i = 0; i < num_tc; i++) {
4775 hw->fc.high_water[i] = ixgbe_hpbthresh(adapter, i);
4776 hw->fc.low_water[i] = ixgbe_lpbthresh(adapter, i);
4777
4778 /* Low water marks must not be larger than high water marks */
4779 if (hw->fc.low_water[i] > hw->fc.high_water[i])
4780 hw->fc.low_water[i] = 0;
4781 }
4782
4783 for (; i < MAX_TRAFFIC_CLASS; i++)
4784 hw->fc.high_water[i] = 0;
4785 }
4786
4787 static void ixgbe_configure_pb(struct ixgbe_adapter *adapter)
4788 {
4789 struct ixgbe_hw *hw = &adapter->hw;
4790 int hdrm;
4791 u8 tc = netdev_get_num_tc(adapter->netdev);
4792
4793 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
4794 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
4795 hdrm = 32 << adapter->fdir_pballoc;
4796 else
4797 hdrm = 0;
4798
4799 hw->mac.ops.set_rxpba(hw, tc, hdrm, PBA_STRATEGY_EQUAL);
4800 ixgbe_pbthresh_setup(adapter);
4801 }
4802
4803 static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
4804 {
4805 struct ixgbe_hw *hw = &adapter->hw;
4806 struct hlist_node *node2;
4807 struct ixgbe_fdir_filter *filter;
4808
4809 spin_lock(&adapter->fdir_perfect_lock);
4810
4811 if (!hlist_empty(&adapter->fdir_filter_list))
4812 ixgbe_fdir_set_input_mask_82599(hw, &adapter->fdir_mask);
4813
4814 hlist_for_each_entry_safe(filter, node2,
4815 &adapter->fdir_filter_list, fdir_node) {
4816 ixgbe_fdir_write_perfect_filter_82599(hw,
4817 &filter->filter,
4818 filter->sw_idx,
4819 (filter->action == IXGBE_FDIR_DROP_QUEUE) ?
4820 IXGBE_FDIR_DROP_QUEUE :
4821 adapter->rx_ring[filter->action]->reg_idx);
4822 }
4823
4824 spin_unlock(&adapter->fdir_perfect_lock);
4825 }
4826
4827 static void ixgbe_macvlan_set_rx_mode(struct net_device *dev, unsigned int pool,
4828 struct ixgbe_adapter *adapter)
4829 {
4830 struct ixgbe_hw *hw = &adapter->hw;
4831 u32 vmolr;
4832
4833 /* No unicast promiscuous support for VMDQ devices. */
4834 vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(pool));
4835 vmolr |= (IXGBE_VMOLR_ROMPE | IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE);
4836
4837 /* clear the affected bit */
4838 vmolr &= ~IXGBE_VMOLR_MPE;
4839
4840 if (dev->flags & IFF_ALLMULTI) {
4841 vmolr |= IXGBE_VMOLR_MPE;
4842 } else {
4843 vmolr |= IXGBE_VMOLR_ROMPE;
4844 hw->mac.ops.update_mc_addr_list(hw, dev);
4845 }
4846 ixgbe_write_uc_addr_list(adapter->netdev, pool);
4847 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(pool), vmolr);
4848 }
4849
4850 static void ixgbe_fwd_psrtype(struct ixgbe_fwd_adapter *vadapter)
4851 {
4852 struct ixgbe_adapter *adapter = vadapter->real_adapter;
4853 int rss_i = adapter->num_rx_queues_per_pool;
4854 struct ixgbe_hw *hw = &adapter->hw;
4855 u16 pool = vadapter->pool;
4856 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
4857 IXGBE_PSRTYPE_UDPHDR |
4858 IXGBE_PSRTYPE_IPV4HDR |
4859 IXGBE_PSRTYPE_L2HDR |
4860 IXGBE_PSRTYPE_IPV6HDR;
4861
4862 if (hw->mac.type == ixgbe_mac_82598EB)
4863 return;
4864
4865 if (rss_i > 3)
4866 psrtype |= 2u << 29;
4867 else if (rss_i > 1)
4868 psrtype |= 1u << 29;
4869
4870 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(VMDQ_P(pool)), psrtype);
4871 }
4872
4873 /**
4874 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
4875 * @rx_ring: ring to free buffers from
4876 **/
4877 static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring)
4878 {
4879 struct device *dev = rx_ring->dev;
4880 unsigned long size;
4881 u16 i;
4882
4883 /* ring already cleared, nothing to do */
4884 if (!rx_ring->rx_buffer_info)
4885 return;
4886
4887 /* Free all the Rx ring sk_buffs */
4888 for (i = 0; i < rx_ring->count; i++) {
4889 struct ixgbe_rx_buffer *rx_buffer = &rx_ring->rx_buffer_info[i];
4890
4891 if (rx_buffer->skb) {
4892 struct sk_buff *skb = rx_buffer->skb;
4893 if (IXGBE_CB(skb)->page_released)
4894 dma_unmap_page(dev,
4895 IXGBE_CB(skb)->dma,
4896 ixgbe_rx_bufsz(rx_ring),
4897 DMA_FROM_DEVICE);
4898 dev_kfree_skb(skb);
4899 rx_buffer->skb = NULL;
4900 }
4901
4902 if (!rx_buffer->page)
4903 continue;
4904
4905 dma_unmap_page(dev, rx_buffer->dma,
4906 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
4907 __free_pages(rx_buffer->page, ixgbe_rx_pg_order(rx_ring));
4908
4909 rx_buffer->page = NULL;
4910 }
4911
4912 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4913 memset(rx_ring->rx_buffer_info, 0, size);
4914
4915 /* Zero out the descriptor ring */
4916 memset(rx_ring->desc, 0, rx_ring->size);
4917
4918 rx_ring->next_to_alloc = 0;
4919 rx_ring->next_to_clean = 0;
4920 rx_ring->next_to_use = 0;
4921 }
4922
4923 static void ixgbe_disable_fwd_ring(struct ixgbe_fwd_adapter *vadapter,
4924 struct ixgbe_ring *rx_ring)
4925 {
4926 struct ixgbe_adapter *adapter = vadapter->real_adapter;
4927 int index = rx_ring->queue_index + vadapter->rx_base_queue;
4928
4929 /* shutdown specific queue receive and wait for dma to settle */
4930 ixgbe_disable_rx_queue(adapter, rx_ring);
4931 usleep_range(10000, 20000);
4932 ixgbe_irq_disable_queues(adapter, BIT_ULL(index));
4933 ixgbe_clean_rx_ring(rx_ring);
4934 rx_ring->l2_accel_priv = NULL;
4935 }
4936
4937 static int ixgbe_fwd_ring_down(struct net_device *vdev,
4938 struct ixgbe_fwd_adapter *accel)
4939 {
4940 struct ixgbe_adapter *adapter = accel->real_adapter;
4941 unsigned int rxbase = accel->rx_base_queue;
4942 unsigned int txbase = accel->tx_base_queue;
4943 int i;
4944
4945 netif_tx_stop_all_queues(vdev);
4946
4947 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4948 ixgbe_disable_fwd_ring(accel, adapter->rx_ring[rxbase + i]);
4949 adapter->rx_ring[rxbase + i]->netdev = adapter->netdev;
4950 }
4951
4952 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4953 adapter->tx_ring[txbase + i]->l2_accel_priv = NULL;
4954 adapter->tx_ring[txbase + i]->netdev = adapter->netdev;
4955 }
4956
4957
4958 return 0;
4959 }
4960
4961 static int ixgbe_fwd_ring_up(struct net_device *vdev,
4962 struct ixgbe_fwd_adapter *accel)
4963 {
4964 struct ixgbe_adapter *adapter = accel->real_adapter;
4965 unsigned int rxbase, txbase, queues;
4966 int i, baseq, err = 0;
4967
4968 if (!test_bit(accel->pool, &adapter->fwd_bitmask))
4969 return 0;
4970
4971 baseq = accel->pool * adapter->num_rx_queues_per_pool;
4972 netdev_dbg(vdev, "pool %i:%i queues %i:%i VSI bitmask %lx\n",
4973 accel->pool, adapter->num_rx_pools,
4974 baseq, baseq + adapter->num_rx_queues_per_pool,
4975 adapter->fwd_bitmask);
4976
4977 accel->netdev = vdev;
4978 accel->rx_base_queue = rxbase = baseq;
4979 accel->tx_base_queue = txbase = baseq;
4980
4981 for (i = 0; i < adapter->num_rx_queues_per_pool; i++)
4982 ixgbe_disable_fwd_ring(accel, adapter->rx_ring[rxbase + i]);
4983
4984 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4985 adapter->rx_ring[rxbase + i]->netdev = vdev;
4986 adapter->rx_ring[rxbase + i]->l2_accel_priv = accel;
4987 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[rxbase + i]);
4988 }
4989
4990 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4991 adapter->tx_ring[txbase + i]->netdev = vdev;
4992 adapter->tx_ring[txbase + i]->l2_accel_priv = accel;
4993 }
4994
4995 queues = min_t(unsigned int,
4996 adapter->num_rx_queues_per_pool, vdev->num_tx_queues);
4997 err = netif_set_real_num_tx_queues(vdev, queues);
4998 if (err)
4999 goto fwd_queue_err;
5000
5001 err = netif_set_real_num_rx_queues(vdev, queues);
5002 if (err)
5003 goto fwd_queue_err;
5004
5005 if (is_valid_ether_addr(vdev->dev_addr))
5006 ixgbe_add_mac_filter(adapter, vdev->dev_addr, accel->pool);
5007
5008 ixgbe_fwd_psrtype(accel);
5009 ixgbe_macvlan_set_rx_mode(vdev, accel->pool, adapter);
5010 return err;
5011 fwd_queue_err:
5012 ixgbe_fwd_ring_down(vdev, accel);
5013 return err;
5014 }
5015
5016 static void ixgbe_configure_dfwd(struct ixgbe_adapter *adapter)
5017 {
5018 struct net_device *upper;
5019 struct list_head *iter;
5020 int err;
5021
5022 netdev_for_each_all_upper_dev_rcu(adapter->netdev, upper, iter) {
5023 if (netif_is_macvlan(upper)) {
5024 struct macvlan_dev *dfwd = netdev_priv(upper);
5025 struct ixgbe_fwd_adapter *vadapter = dfwd->fwd_priv;
5026
5027 if (dfwd->fwd_priv) {
5028 err = ixgbe_fwd_ring_up(upper, vadapter);
5029 if (err)
5030 continue;
5031 }
5032 }
5033 }
5034 }
5035
5036 static void ixgbe_configure(struct ixgbe_adapter *adapter)
5037 {
5038 struct ixgbe_hw *hw = &adapter->hw;
5039
5040 ixgbe_configure_pb(adapter);
5041 #ifdef CONFIG_IXGBE_DCB
5042 ixgbe_configure_dcb(adapter);
5043 #endif
5044 /*
5045 * We must restore virtualization before VLANs or else
5046 * the VLVF registers will not be populated
5047 */
5048 ixgbe_configure_virtualization(adapter);
5049
5050 ixgbe_set_rx_mode(adapter->netdev);
5051 ixgbe_restore_vlan(adapter);
5052
5053 switch (hw->mac.type) {
5054 case ixgbe_mac_82599EB:
5055 case ixgbe_mac_X540:
5056 hw->mac.ops.disable_rx_buff(hw);
5057 break;
5058 default:
5059 break;
5060 }
5061
5062 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
5063 ixgbe_init_fdir_signature_82599(&adapter->hw,
5064 adapter->fdir_pballoc);
5065 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
5066 ixgbe_init_fdir_perfect_82599(&adapter->hw,
5067 adapter->fdir_pballoc);
5068 ixgbe_fdir_filter_restore(adapter);
5069 }
5070
5071 switch (hw->mac.type) {
5072 case ixgbe_mac_82599EB:
5073 case ixgbe_mac_X540:
5074 hw->mac.ops.enable_rx_buff(hw);
5075 break;
5076 default:
5077 break;
5078 }
5079
5080 #ifdef CONFIG_IXGBE_DCA
5081 /* configure DCA */
5082 if (adapter->flags & IXGBE_FLAG_DCA_CAPABLE)
5083 ixgbe_setup_dca(adapter);
5084 #endif /* CONFIG_IXGBE_DCA */
5085
5086 #ifdef IXGBE_FCOE
5087 /* configure FCoE L2 filters, redirection table, and Rx control */
5088 ixgbe_configure_fcoe(adapter);
5089
5090 #endif /* IXGBE_FCOE */
5091 ixgbe_configure_tx(adapter);
5092 ixgbe_configure_rx(adapter);
5093 ixgbe_configure_dfwd(adapter);
5094 }
5095
5096 /**
5097 * ixgbe_sfp_link_config - set up SFP+ link
5098 * @adapter: pointer to private adapter struct
5099 **/
5100 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
5101 {
5102 /*
5103 * We are assuming the worst case scenario here, and that
5104 * is that an SFP was inserted/removed after the reset
5105 * but before SFP detection was enabled. As such the best
5106 * solution is to just start searching as soon as we start
5107 */
5108 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
5109 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
5110
5111 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
5112 adapter->sfp_poll_time = 0;
5113 }
5114
5115 /**
5116 * ixgbe_non_sfp_link_config - set up non-SFP+ link
5117 * @hw: pointer to private hardware struct
5118 *
5119 * Returns 0 on success, negative on failure
5120 **/
5121 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
5122 {
5123 u32 speed;
5124 bool autoneg, link_up = false;
5125 int ret = IXGBE_ERR_LINK_SETUP;
5126
5127 if (hw->mac.ops.check_link)
5128 ret = hw->mac.ops.check_link(hw, &speed, &link_up, false);
5129
5130 if (ret)
5131 return ret;
5132
5133 speed = hw->phy.autoneg_advertised;
5134 if ((!speed) && (hw->mac.ops.get_link_capabilities))
5135 ret = hw->mac.ops.get_link_capabilities(hw, &speed,
5136 &autoneg);
5137 if (ret)
5138 return ret;
5139
5140 if (hw->mac.ops.setup_link)
5141 ret = hw->mac.ops.setup_link(hw, speed, link_up);
5142
5143 return ret;
5144 }
5145
5146 static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
5147 {
5148 struct ixgbe_hw *hw = &adapter->hw;
5149 u32 gpie = 0;
5150
5151 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
5152 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
5153 IXGBE_GPIE_OCD;
5154 gpie |= IXGBE_GPIE_EIAME;
5155 /*
5156 * use EIAM to auto-mask when MSI-X interrupt is asserted
5157 * this saves a register write for every interrupt
5158 */
5159 switch (hw->mac.type) {
5160 case ixgbe_mac_82598EB:
5161 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
5162 break;
5163 case ixgbe_mac_82599EB:
5164 case ixgbe_mac_X540:
5165 case ixgbe_mac_X550:
5166 case ixgbe_mac_X550EM_x:
5167 case ixgbe_mac_x550em_a:
5168 default:
5169 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
5170 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
5171 break;
5172 }
5173 } else {
5174 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
5175 * specifically only auto mask tx and rx interrupts */
5176 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
5177 }
5178
5179 /* XXX: to interrupt immediately for EICS writes, enable this */
5180 /* gpie |= IXGBE_GPIE_EIMEN; */
5181
5182 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
5183 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
5184
5185 switch (adapter->ring_feature[RING_F_VMDQ].mask) {
5186 case IXGBE_82599_VMDQ_8Q_MASK:
5187 gpie |= IXGBE_GPIE_VTMODE_16;
5188 break;
5189 case IXGBE_82599_VMDQ_4Q_MASK:
5190 gpie |= IXGBE_GPIE_VTMODE_32;
5191 break;
5192 default:
5193 gpie |= IXGBE_GPIE_VTMODE_64;
5194 break;
5195 }
5196 }
5197
5198 /* Enable Thermal over heat sensor interrupt */
5199 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
5200 switch (adapter->hw.mac.type) {
5201 case ixgbe_mac_82599EB:
5202 gpie |= IXGBE_SDP0_GPIEN_8259X;
5203 break;
5204 default:
5205 break;
5206 }
5207 }
5208
5209 /* Enable fan failure interrupt */
5210 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
5211 gpie |= IXGBE_SDP1_GPIEN(hw);
5212
5213 switch (hw->mac.type) {
5214 case ixgbe_mac_82599EB:
5215 gpie |= IXGBE_SDP1_GPIEN_8259X | IXGBE_SDP2_GPIEN_8259X;
5216 break;
5217 case ixgbe_mac_X550EM_x:
5218 case ixgbe_mac_x550em_a:
5219 gpie |= IXGBE_SDP0_GPIEN_X540;
5220 break;
5221 default:
5222 break;
5223 }
5224
5225 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
5226 }
5227
5228 static void ixgbe_up_complete(struct ixgbe_adapter *adapter)
5229 {
5230 struct ixgbe_hw *hw = &adapter->hw;
5231 int err;
5232 u32 ctrl_ext;
5233
5234 ixgbe_get_hw_control(adapter);
5235 ixgbe_setup_gpie(adapter);
5236
5237 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
5238 ixgbe_configure_msix(adapter);
5239 else
5240 ixgbe_configure_msi_and_legacy(adapter);
5241
5242 /* enable the optics for 82599 SFP+ fiber */
5243 if (hw->mac.ops.enable_tx_laser)
5244 hw->mac.ops.enable_tx_laser(hw);
5245
5246 if (hw->phy.ops.set_phy_power)
5247 hw->phy.ops.set_phy_power(hw, true);
5248
5249 smp_mb__before_atomic();
5250 clear_bit(__IXGBE_DOWN, &adapter->state);
5251 ixgbe_napi_enable_all(adapter);
5252
5253 if (ixgbe_is_sfp(hw)) {
5254 ixgbe_sfp_link_config(adapter);
5255 } else {
5256 err = ixgbe_non_sfp_link_config(hw);
5257 if (err)
5258 e_err(probe, "link_config FAILED %d\n", err);
5259 }
5260
5261 /* clear any pending interrupts, may auto mask */
5262 IXGBE_READ_REG(hw, IXGBE_EICR);
5263 ixgbe_irq_enable(adapter, true, true);
5264
5265 /*
5266 * If this adapter has a fan, check to see if we had a failure
5267 * before we enabled the interrupt.
5268 */
5269 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
5270 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
5271 if (esdp & IXGBE_ESDP_SDP1)
5272 e_crit(drv, "Fan has stopped, replace the adapter\n");
5273 }
5274
5275 /* bring the link up in the watchdog, this could race with our first
5276 * link up interrupt but shouldn't be a problem */
5277 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
5278 adapter->link_check_timeout = jiffies;
5279 mod_timer(&adapter->service_timer, jiffies);
5280
5281 /* Set PF Reset Done bit so PF/VF Mail Ops can work */
5282 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
5283 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
5284 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
5285 }
5286
5287 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
5288 {
5289 WARN_ON(in_interrupt());
5290 /* put off any impending NetWatchDogTimeout */
5291 adapter->netdev->trans_start = jiffies;
5292
5293 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
5294 usleep_range(1000, 2000);
5295 ixgbe_down(adapter);
5296 /*
5297 * If SR-IOV enabled then wait a bit before bringing the adapter
5298 * back up to give the VFs time to respond to the reset. The
5299 * two second wait is based upon the watchdog timer cycle in
5300 * the VF driver.
5301 */
5302 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
5303 msleep(2000);
5304 ixgbe_up(adapter);
5305 clear_bit(__IXGBE_RESETTING, &adapter->state);
5306 }
5307
5308 void ixgbe_up(struct ixgbe_adapter *adapter)
5309 {
5310 /* hardware has been reset, we need to reload some things */
5311 ixgbe_configure(adapter);
5312
5313 ixgbe_up_complete(adapter);
5314 }
5315
5316 void ixgbe_reset(struct ixgbe_adapter *adapter)
5317 {
5318 struct ixgbe_hw *hw = &adapter->hw;
5319 struct net_device *netdev = adapter->netdev;
5320 int err;
5321
5322 if (ixgbe_removed(hw->hw_addr))
5323 return;
5324 /* lock SFP init bit to prevent race conditions with the watchdog */
5325 while (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
5326 usleep_range(1000, 2000);
5327
5328 /* clear all SFP and link config related flags while holding SFP_INIT */
5329 adapter->flags2 &= ~(IXGBE_FLAG2_SEARCH_FOR_SFP |
5330 IXGBE_FLAG2_SFP_NEEDS_RESET);
5331 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
5332
5333 err = hw->mac.ops.init_hw(hw);
5334 switch (err) {
5335 case 0:
5336 case IXGBE_ERR_SFP_NOT_PRESENT:
5337 case IXGBE_ERR_SFP_NOT_SUPPORTED:
5338 break;
5339 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
5340 e_dev_err("master disable timed out\n");
5341 break;
5342 case IXGBE_ERR_EEPROM_VERSION:
5343 /* We are running on a pre-production device, log a warning */
5344 e_dev_warn("This device is a pre-production adapter/LOM. "
5345 "Please be aware there may be issues associated with "
5346 "your hardware. If you are experiencing problems "
5347 "please contact your Intel or hardware "
5348 "representative who provided you with this "
5349 "hardware.\n");
5350 break;
5351 default:
5352 e_dev_err("Hardware Error: %d\n", err);
5353 }
5354
5355 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
5356
5357 /* flush entries out of MAC table */
5358 ixgbe_flush_sw_mac_table(adapter);
5359 __dev_uc_unsync(netdev, NULL);
5360
5361 /* do not flush user set addresses */
5362 ixgbe_mac_set_default_filter(adapter);
5363
5364 /* update SAN MAC vmdq pool selection */
5365 if (hw->mac.san_mac_rar_index)
5366 hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));
5367
5368 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
5369 ixgbe_ptp_reset(adapter);
5370
5371 if (hw->phy.ops.set_phy_power) {
5372 if (!netif_running(adapter->netdev) && !adapter->wol)
5373 hw->phy.ops.set_phy_power(hw, false);
5374 else
5375 hw->phy.ops.set_phy_power(hw, true);
5376 }
5377 }
5378
5379 /**
5380 * ixgbe_clean_tx_ring - Free Tx Buffers
5381 * @tx_ring: ring to be cleaned
5382 **/
5383 static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
5384 {
5385 struct ixgbe_tx_buffer *tx_buffer_info;
5386 unsigned long size;
5387 u16 i;
5388
5389 /* ring already cleared, nothing to do */
5390 if (!tx_ring->tx_buffer_info)
5391 return;
5392
5393 /* Free all the Tx ring sk_buffs */
5394 for (i = 0; i < tx_ring->count; i++) {
5395 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5396 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
5397 }
5398
5399 netdev_tx_reset_queue(txring_txq(tx_ring));
5400
5401 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
5402 memset(tx_ring->tx_buffer_info, 0, size);
5403
5404 /* Zero out the descriptor ring */
5405 memset(tx_ring->desc, 0, tx_ring->size);
5406
5407 tx_ring->next_to_use = 0;
5408 tx_ring->next_to_clean = 0;
5409 }
5410
5411 /**
5412 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
5413 * @adapter: board private structure
5414 **/
5415 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
5416 {
5417 int i;
5418
5419 for (i = 0; i < adapter->num_rx_queues; i++)
5420 ixgbe_clean_rx_ring(adapter->rx_ring[i]);
5421 }
5422
5423 /**
5424 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
5425 * @adapter: board private structure
5426 **/
5427 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
5428 {
5429 int i;
5430
5431 for (i = 0; i < adapter->num_tx_queues; i++)
5432 ixgbe_clean_tx_ring(adapter->tx_ring[i]);
5433 }
5434
5435 static void ixgbe_fdir_filter_exit(struct ixgbe_adapter *adapter)
5436 {
5437 struct hlist_node *node2;
5438 struct ixgbe_fdir_filter *filter;
5439
5440 spin_lock(&adapter->fdir_perfect_lock);
5441
5442 hlist_for_each_entry_safe(filter, node2,
5443 &adapter->fdir_filter_list, fdir_node) {
5444 hlist_del(&filter->fdir_node);
5445 kfree(filter);
5446 }
5447 adapter->fdir_filter_count = 0;
5448
5449 spin_unlock(&adapter->fdir_perfect_lock);
5450 }
5451
5452 void ixgbe_down(struct ixgbe_adapter *adapter)
5453 {
5454 struct net_device *netdev = adapter->netdev;
5455 struct ixgbe_hw *hw = &adapter->hw;
5456 struct net_device *upper;
5457 struct list_head *iter;
5458 int i;
5459
5460 /* signal that we are down to the interrupt handler */
5461 if (test_and_set_bit(__IXGBE_DOWN, &adapter->state))
5462 return; /* do nothing if already down */
5463
5464 /* disable receives */
5465 hw->mac.ops.disable_rx(hw);
5466
5467 /* disable all enabled rx queues */
5468 for (i = 0; i < adapter->num_rx_queues; i++)
5469 /* this call also flushes the previous write */
5470 ixgbe_disable_rx_queue(adapter, adapter->rx_ring[i]);
5471
5472 usleep_range(10000, 20000);
5473
5474 netif_tx_stop_all_queues(netdev);
5475
5476 /* call carrier off first to avoid false dev_watchdog timeouts */
5477 netif_carrier_off(netdev);
5478 netif_tx_disable(netdev);
5479
5480 /* disable any upper devices */
5481 netdev_for_each_all_upper_dev_rcu(adapter->netdev, upper, iter) {
5482 if (netif_is_macvlan(upper)) {
5483 struct macvlan_dev *vlan = netdev_priv(upper);
5484
5485 if (vlan->fwd_priv) {
5486 netif_tx_stop_all_queues(upper);
5487 netif_carrier_off(upper);
5488 netif_tx_disable(upper);
5489 }
5490 }
5491 }
5492
5493 ixgbe_irq_disable(adapter);
5494
5495 ixgbe_napi_disable_all(adapter);
5496
5497 adapter->flags2 &= ~(IXGBE_FLAG2_FDIR_REQUIRES_REINIT |
5498 IXGBE_FLAG2_RESET_REQUESTED);
5499 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5500
5501 del_timer_sync(&adapter->service_timer);
5502
5503 if (adapter->num_vfs) {
5504 /* Clear EITR Select mapping */
5505 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
5506
5507 /* Mark all the VFs as inactive */
5508 for (i = 0 ; i < adapter->num_vfs; i++)
5509 adapter->vfinfo[i].clear_to_send = false;
5510
5511 /* ping all the active vfs to let them know we are going down */
5512 ixgbe_ping_all_vfs(adapter);
5513
5514 /* Disable all VFTE/VFRE TX/RX */
5515 ixgbe_disable_tx_rx(adapter);
5516 }
5517
5518 /* disable transmits in the hardware now that interrupts are off */
5519 for (i = 0; i < adapter->num_tx_queues; i++) {
5520 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
5521 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
5522 }
5523
5524 /* Disable the Tx DMA engine on 82599 and later MAC */
5525 switch (hw->mac.type) {
5526 case ixgbe_mac_82599EB:
5527 case ixgbe_mac_X540:
5528 case ixgbe_mac_X550:
5529 case ixgbe_mac_X550EM_x:
5530 case ixgbe_mac_x550em_a:
5531 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
5532 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
5533 ~IXGBE_DMATXCTL_TE));
5534 break;
5535 default:
5536 break;
5537 }
5538
5539 if (!pci_channel_offline(adapter->pdev))
5540 ixgbe_reset(adapter);
5541
5542 /* power down the optics for 82599 SFP+ fiber */
5543 if (hw->mac.ops.disable_tx_laser)
5544 hw->mac.ops.disable_tx_laser(hw);
5545
5546 ixgbe_clean_all_tx_rings(adapter);
5547 ixgbe_clean_all_rx_rings(adapter);
5548 }
5549
5550 /**
5551 * ixgbe_tx_timeout - Respond to a Tx Hang
5552 * @netdev: network interface device structure
5553 **/
5554 static void ixgbe_tx_timeout(struct net_device *netdev)
5555 {
5556 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5557
5558 /* Do the reset outside of interrupt context */
5559 ixgbe_tx_timeout_reset(adapter);
5560 }
5561
5562 /**
5563 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
5564 * @adapter: board private structure to initialize
5565 *
5566 * ixgbe_sw_init initializes the Adapter private data structure.
5567 * Fields are initialized based on PCI device information and
5568 * OS network device settings (MTU size).
5569 **/
5570 static int ixgbe_sw_init(struct ixgbe_adapter *adapter)
5571 {
5572 struct ixgbe_hw *hw = &adapter->hw;
5573 struct pci_dev *pdev = adapter->pdev;
5574 unsigned int rss, fdir;
5575 u32 fwsm;
5576 u16 device_caps;
5577 #ifdef CONFIG_IXGBE_DCB
5578 int j;
5579 struct tc_configuration *tc;
5580 #endif
5581
5582 /* PCI config space info */
5583
5584 hw->vendor_id = pdev->vendor;
5585 hw->device_id = pdev->device;
5586 hw->revision_id = pdev->revision;
5587 hw->subsystem_vendor_id = pdev->subsystem_vendor;
5588 hw->subsystem_device_id = pdev->subsystem_device;
5589
5590 /* Set common capability flags and settings */
5591 rss = min_t(int, ixgbe_max_rss_indices(adapter), num_online_cpus());
5592 adapter->ring_feature[RING_F_RSS].limit = rss;
5593 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
5594 adapter->max_q_vectors = MAX_Q_VECTORS_82599;
5595 adapter->atr_sample_rate = 20;
5596 fdir = min_t(int, IXGBE_MAX_FDIR_INDICES, num_online_cpus());
5597 adapter->ring_feature[RING_F_FDIR].limit = fdir;
5598 adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_64K;
5599 #ifdef CONFIG_IXGBE_DCA
5600 adapter->flags |= IXGBE_FLAG_DCA_CAPABLE;
5601 #endif
5602 #ifdef IXGBE_FCOE
5603 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
5604 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
5605 #ifdef CONFIG_IXGBE_DCB
5606 /* Default traffic class to use for FCoE */
5607 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
5608 #endif /* CONFIG_IXGBE_DCB */
5609 #endif /* IXGBE_FCOE */
5610
5611 /* initialize static ixgbe jump table entries */
5612 adapter->jump_tables[0] = ixgbe_ipv4_fields;
5613
5614 adapter->mac_table = kzalloc(sizeof(struct ixgbe_mac_addr) *
5615 hw->mac.num_rar_entries,
5616 GFP_ATOMIC);
5617 if (!adapter->mac_table)
5618 return -ENOMEM;
5619
5620 /* Set MAC specific capability flags and exceptions */
5621 switch (hw->mac.type) {
5622 case ixgbe_mac_82598EB:
5623 adapter->flags2 &= ~IXGBE_FLAG2_RSC_CAPABLE;
5624
5625 if (hw->device_id == IXGBE_DEV_ID_82598AT)
5626 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
5627
5628 adapter->max_q_vectors = MAX_Q_VECTORS_82598;
5629 adapter->ring_feature[RING_F_FDIR].limit = 0;
5630 adapter->atr_sample_rate = 0;
5631 adapter->fdir_pballoc = 0;
5632 #ifdef IXGBE_FCOE
5633 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
5634 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
5635 #ifdef CONFIG_IXGBE_DCB
5636 adapter->fcoe.up = 0;
5637 #endif /* IXGBE_DCB */
5638 #endif /* IXGBE_FCOE */
5639 break;
5640 case ixgbe_mac_82599EB:
5641 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
5642 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
5643 break;
5644 case ixgbe_mac_X540:
5645 fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM(hw));
5646 if (fwsm & IXGBE_FWSM_TS_ENABLED)
5647 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
5648 break;
5649 case ixgbe_mac_X550EM_x:
5650 case ixgbe_mac_x550em_a:
5651 case ixgbe_mac_X550:
5652 #ifdef CONFIG_IXGBE_DCA
5653 adapter->flags &= ~IXGBE_FLAG_DCA_CAPABLE;
5654 #endif
5655 #ifdef CONFIG_IXGBE_VXLAN
5656 adapter->flags |= IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE;
5657 #endif
5658 break;
5659 default:
5660 break;
5661 }
5662
5663 #ifdef IXGBE_FCOE
5664 /* FCoE support exists, always init the FCoE lock */
5665 spin_lock_init(&adapter->fcoe.lock);
5666
5667 #endif
5668 /* n-tuple support exists, always init our spinlock */
5669 spin_lock_init(&adapter->fdir_perfect_lock);
5670
5671 #ifdef CONFIG_IXGBE_DCB
5672 switch (hw->mac.type) {
5673 case ixgbe_mac_X540:
5674 case ixgbe_mac_X550:
5675 case ixgbe_mac_X550EM_x:
5676 case ixgbe_mac_x550em_a:
5677 adapter->dcb_cfg.num_tcs.pg_tcs = X540_TRAFFIC_CLASS;
5678 adapter->dcb_cfg.num_tcs.pfc_tcs = X540_TRAFFIC_CLASS;
5679 break;
5680 default:
5681 adapter->dcb_cfg.num_tcs.pg_tcs = MAX_TRAFFIC_CLASS;
5682 adapter->dcb_cfg.num_tcs.pfc_tcs = MAX_TRAFFIC_CLASS;
5683 break;
5684 }
5685
5686 /* Configure DCB traffic classes */
5687 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
5688 tc = &adapter->dcb_cfg.tc_config[j];
5689 tc->path[DCB_TX_CONFIG].bwg_id = 0;
5690 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
5691 tc->path[DCB_RX_CONFIG].bwg_id = 0;
5692 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
5693 tc->dcb_pfc = pfc_disabled;
5694 }
5695
5696 /* Initialize default user to priority mapping, UPx->TC0 */
5697 tc = &adapter->dcb_cfg.tc_config[0];
5698 tc->path[DCB_TX_CONFIG].up_to_tc_bitmap = 0xFF;
5699 tc->path[DCB_RX_CONFIG].up_to_tc_bitmap = 0xFF;
5700
5701 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
5702 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
5703 adapter->dcb_cfg.pfc_mode_enable = false;
5704 adapter->dcb_set_bitmap = 0x00;
5705 adapter->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE;
5706 memcpy(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
5707 sizeof(adapter->temp_dcb_cfg));
5708
5709 #endif
5710
5711 /* default flow control settings */
5712 hw->fc.requested_mode = ixgbe_fc_full;
5713 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
5714 ixgbe_pbthresh_setup(adapter);
5715 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
5716 hw->fc.send_xon = true;
5717 hw->fc.disable_fc_autoneg = ixgbe_device_supports_autoneg_fc(hw);
5718
5719 #ifdef CONFIG_PCI_IOV
5720 if (max_vfs > 0)
5721 e_dev_warn("Enabling SR-IOV VFs using the max_vfs module parameter is deprecated - please use the pci sysfs interface instead.\n");
5722
5723 /* assign number of SR-IOV VFs */
5724 if (hw->mac.type != ixgbe_mac_82598EB) {
5725 if (max_vfs > IXGBE_MAX_VFS_DRV_LIMIT) {
5726 adapter->num_vfs = 0;
5727 e_dev_warn("max_vfs parameter out of range. Not assigning any SR-IOV VFs\n");
5728 } else {
5729 adapter->num_vfs = max_vfs;
5730 }
5731 }
5732 #endif /* CONFIG_PCI_IOV */
5733
5734 /* enable itr by default in dynamic mode */
5735 adapter->rx_itr_setting = 1;
5736 adapter->tx_itr_setting = 1;
5737
5738 /* set default ring sizes */
5739 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
5740 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
5741
5742 /* Cache bit indicating need for crosstalk fix */
5743 switch (hw->mac.type) {
5744 case ixgbe_mac_82599EB:
5745 case ixgbe_mac_X550EM_x:
5746 case ixgbe_mac_x550em_a:
5747 hw->mac.ops.get_device_caps(hw, &device_caps);
5748 if (device_caps & IXGBE_DEVICE_CAPS_NO_CROSSTALK_WR)
5749 adapter->need_crosstalk_fix = false;
5750 else
5751 adapter->need_crosstalk_fix = true;
5752 break;
5753 default:
5754 adapter->need_crosstalk_fix = false;
5755 break;
5756 }
5757
5758 /* set default work limits */
5759 adapter->tx_work_limit = IXGBE_DEFAULT_TX_WORK;
5760
5761 /* initialize eeprom parameters */
5762 if (ixgbe_init_eeprom_params_generic(hw)) {
5763 e_dev_err("EEPROM initialization failed\n");
5764 return -EIO;
5765 }
5766
5767 /* PF holds first pool slot */
5768 set_bit(0, &adapter->fwd_bitmask);
5769 set_bit(__IXGBE_DOWN, &adapter->state);
5770
5771 return 0;
5772 }
5773
5774 /**
5775 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
5776 * @tx_ring: tx descriptor ring (for a specific queue) to setup
5777 *
5778 * Return 0 on success, negative on failure
5779 **/
5780 int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
5781 {
5782 struct device *dev = tx_ring->dev;
5783 int orig_node = dev_to_node(dev);
5784 int ring_node = -1;
5785 int size;
5786
5787 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
5788
5789 if (tx_ring->q_vector)
5790 ring_node = tx_ring->q_vector->numa_node;
5791
5792 tx_ring->tx_buffer_info = vzalloc_node(size, ring_node);
5793 if (!tx_ring->tx_buffer_info)
5794 tx_ring->tx_buffer_info = vzalloc(size);
5795 if (!tx_ring->tx_buffer_info)
5796 goto err;
5797
5798 u64_stats_init(&tx_ring->syncp);
5799
5800 /* round up to nearest 4K */
5801 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
5802 tx_ring->size = ALIGN(tx_ring->size, 4096);
5803
5804 set_dev_node(dev, ring_node);
5805 tx_ring->desc = dma_alloc_coherent(dev,
5806 tx_ring->size,
5807 &tx_ring->dma,
5808 GFP_KERNEL);
5809 set_dev_node(dev, orig_node);
5810 if (!tx_ring->desc)
5811 tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
5812 &tx_ring->dma, GFP_KERNEL);
5813 if (!tx_ring->desc)
5814 goto err;
5815
5816 tx_ring->next_to_use = 0;
5817 tx_ring->next_to_clean = 0;
5818 return 0;
5819
5820 err:
5821 vfree(tx_ring->tx_buffer_info);
5822 tx_ring->tx_buffer_info = NULL;
5823 dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n");
5824 return -ENOMEM;
5825 }
5826
5827 /**
5828 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
5829 * @adapter: board private structure
5830 *
5831 * If this function returns with an error, then it's possible one or
5832 * more of the rings is populated (while the rest are not). It is the
5833 * callers duty to clean those orphaned rings.
5834 *
5835 * Return 0 on success, negative on failure
5836 **/
5837 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
5838 {
5839 int i, err = 0;
5840
5841 for (i = 0; i < adapter->num_tx_queues; i++) {
5842 err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
5843 if (!err)
5844 continue;
5845
5846 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
5847 goto err_setup_tx;
5848 }
5849
5850 return 0;
5851 err_setup_tx:
5852 /* rewind the index freeing the rings as we go */
5853 while (i--)
5854 ixgbe_free_tx_resources(adapter->tx_ring[i]);
5855 return err;
5856 }
5857
5858 /**
5859 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
5860 * @rx_ring: rx descriptor ring (for a specific queue) to setup
5861 *
5862 * Returns 0 on success, negative on failure
5863 **/
5864 int ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring)
5865 {
5866 struct device *dev = rx_ring->dev;
5867 int orig_node = dev_to_node(dev);
5868 int ring_node = -1;
5869 int size;
5870
5871 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
5872
5873 if (rx_ring->q_vector)
5874 ring_node = rx_ring->q_vector->numa_node;
5875
5876 rx_ring->rx_buffer_info = vzalloc_node(size, ring_node);
5877 if (!rx_ring->rx_buffer_info)
5878 rx_ring->rx_buffer_info = vzalloc(size);
5879 if (!rx_ring->rx_buffer_info)
5880 goto err;
5881
5882 u64_stats_init(&rx_ring->syncp);
5883
5884 /* Round up to nearest 4K */
5885 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
5886 rx_ring->size = ALIGN(rx_ring->size, 4096);
5887
5888 set_dev_node(dev, ring_node);
5889 rx_ring->desc = dma_alloc_coherent(dev,
5890 rx_ring->size,
5891 &rx_ring->dma,
5892 GFP_KERNEL);
5893 set_dev_node(dev, orig_node);
5894 if (!rx_ring->desc)
5895 rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
5896 &rx_ring->dma, GFP_KERNEL);
5897 if (!rx_ring->desc)
5898 goto err;
5899
5900 rx_ring->next_to_clean = 0;
5901 rx_ring->next_to_use = 0;
5902
5903 return 0;
5904 err:
5905 vfree(rx_ring->rx_buffer_info);
5906 rx_ring->rx_buffer_info = NULL;
5907 dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");
5908 return -ENOMEM;
5909 }
5910
5911 /**
5912 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
5913 * @adapter: board private structure
5914 *
5915 * If this function returns with an error, then it's possible one or
5916 * more of the rings is populated (while the rest are not). It is the
5917 * callers duty to clean those orphaned rings.
5918 *
5919 * Return 0 on success, negative on failure
5920 **/
5921 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
5922 {
5923 int i, err = 0;
5924
5925 for (i = 0; i < adapter->num_rx_queues; i++) {
5926 err = ixgbe_setup_rx_resources(adapter->rx_ring[i]);
5927 if (!err)
5928 continue;
5929
5930 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
5931 goto err_setup_rx;
5932 }
5933
5934 #ifdef IXGBE_FCOE
5935 err = ixgbe_setup_fcoe_ddp_resources(adapter);
5936 if (!err)
5937 #endif
5938 return 0;
5939 err_setup_rx:
5940 /* rewind the index freeing the rings as we go */
5941 while (i--)
5942 ixgbe_free_rx_resources(adapter->rx_ring[i]);
5943 return err;
5944 }
5945
5946 /**
5947 * ixgbe_free_tx_resources - Free Tx Resources per Queue
5948 * @tx_ring: Tx descriptor ring for a specific queue
5949 *
5950 * Free all transmit software resources
5951 **/
5952 void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring)
5953 {
5954 ixgbe_clean_tx_ring(tx_ring);
5955
5956 vfree(tx_ring->tx_buffer_info);
5957 tx_ring->tx_buffer_info = NULL;
5958
5959 /* if not set, then don't free */
5960 if (!tx_ring->desc)
5961 return;
5962
5963 dma_free_coherent(tx_ring->dev, tx_ring->size,
5964 tx_ring->desc, tx_ring->dma);
5965
5966 tx_ring->desc = NULL;
5967 }
5968
5969 /**
5970 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
5971 * @adapter: board private structure
5972 *
5973 * Free all transmit software resources
5974 **/
5975 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
5976 {
5977 int i;
5978
5979 for (i = 0; i < adapter->num_tx_queues; i++)
5980 if (adapter->tx_ring[i]->desc)
5981 ixgbe_free_tx_resources(adapter->tx_ring[i]);
5982 }
5983
5984 /**
5985 * ixgbe_free_rx_resources - Free Rx Resources
5986 * @rx_ring: ring to clean the resources from
5987 *
5988 * Free all receive software resources
5989 **/
5990 void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring)
5991 {
5992 ixgbe_clean_rx_ring(rx_ring);
5993
5994 vfree(rx_ring->rx_buffer_info);
5995 rx_ring->rx_buffer_info = NULL;
5996
5997 /* if not set, then don't free */
5998 if (!rx_ring->desc)
5999 return;
6000
6001 dma_free_coherent(rx_ring->dev, rx_ring->size,
6002 rx_ring->desc, rx_ring->dma);
6003
6004 rx_ring->desc = NULL;
6005 }
6006
6007 /**
6008 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
6009 * @adapter: board private structure
6010 *
6011 * Free all receive software resources
6012 **/
6013 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
6014 {
6015 int i;
6016
6017 #ifdef IXGBE_FCOE
6018 ixgbe_free_fcoe_ddp_resources(adapter);
6019
6020 #endif
6021 for (i = 0; i < adapter->num_rx_queues; i++)
6022 if (adapter->rx_ring[i]->desc)
6023 ixgbe_free_rx_resources(adapter->rx_ring[i]);
6024 }
6025
6026 /**
6027 * ixgbe_change_mtu - Change the Maximum Transfer Unit
6028 * @netdev: network interface device structure
6029 * @new_mtu: new value for maximum frame size
6030 *
6031 * Returns 0 on success, negative on failure
6032 **/
6033 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
6034 {
6035 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6036 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
6037
6038 /* MTU < 68 is an error and causes problems on some kernels */
6039 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
6040 return -EINVAL;
6041
6042 /*
6043 * For 82599EB we cannot allow legacy VFs to enable their receive
6044 * paths when MTU greater than 1500 is configured. So display a
6045 * warning that legacy VFs will be disabled.
6046 */
6047 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) &&
6048 (adapter->hw.mac.type == ixgbe_mac_82599EB) &&
6049 (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)))
6050 e_warn(probe, "Setting MTU > 1500 will disable legacy VFs\n");
6051
6052 e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
6053
6054 /* must set new MTU before calling down or up */
6055 netdev->mtu = new_mtu;
6056
6057 if (netif_running(netdev))
6058 ixgbe_reinit_locked(adapter);
6059
6060 return 0;
6061 }
6062
6063 /**
6064 * ixgbe_open - Called when a network interface is made active
6065 * @netdev: network interface device structure
6066 *
6067 * Returns 0 on success, negative value on failure
6068 *
6069 * The open entry point is called when a network interface is made
6070 * active by the system (IFF_UP). At this point all resources needed
6071 * for transmit and receive operations are allocated, the interrupt
6072 * handler is registered with the OS, the watchdog timer is started,
6073 * and the stack is notified that the interface is ready.
6074 **/
6075 int ixgbe_open(struct net_device *netdev)
6076 {
6077 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6078 struct ixgbe_hw *hw = &adapter->hw;
6079 int err, queues;
6080
6081 /* disallow open during test */
6082 if (test_bit(__IXGBE_TESTING, &adapter->state))
6083 return -EBUSY;
6084
6085 netif_carrier_off(netdev);
6086
6087 /* allocate transmit descriptors */
6088 err = ixgbe_setup_all_tx_resources(adapter);
6089 if (err)
6090 goto err_setup_tx;
6091
6092 /* allocate receive descriptors */
6093 err = ixgbe_setup_all_rx_resources(adapter);
6094 if (err)
6095 goto err_setup_rx;
6096
6097 ixgbe_configure(adapter);
6098
6099 err = ixgbe_request_irq(adapter);
6100 if (err)
6101 goto err_req_irq;
6102
6103 /* Notify the stack of the actual queue counts. */
6104 if (adapter->num_rx_pools > 1)
6105 queues = adapter->num_rx_queues_per_pool;
6106 else
6107 queues = adapter->num_tx_queues;
6108
6109 err = netif_set_real_num_tx_queues(netdev, queues);
6110 if (err)
6111 goto err_set_queues;
6112
6113 if (adapter->num_rx_pools > 1 &&
6114 adapter->num_rx_queues > IXGBE_MAX_L2A_QUEUES)
6115 queues = IXGBE_MAX_L2A_QUEUES;
6116 else
6117 queues = adapter->num_rx_queues;
6118 err = netif_set_real_num_rx_queues(netdev, queues);
6119 if (err)
6120 goto err_set_queues;
6121
6122 ixgbe_ptp_init(adapter);
6123
6124 ixgbe_up_complete(adapter);
6125
6126 ixgbe_clear_vxlan_port(adapter);
6127 #ifdef CONFIG_IXGBE_VXLAN
6128 vxlan_get_rx_port(netdev);
6129 #endif
6130
6131 return 0;
6132
6133 err_set_queues:
6134 ixgbe_free_irq(adapter);
6135 err_req_irq:
6136 ixgbe_free_all_rx_resources(adapter);
6137 if (hw->phy.ops.set_phy_power && !adapter->wol)
6138 hw->phy.ops.set_phy_power(&adapter->hw, false);
6139 err_setup_rx:
6140 ixgbe_free_all_tx_resources(adapter);
6141 err_setup_tx:
6142 ixgbe_reset(adapter);
6143
6144 return err;
6145 }
6146
6147 static void ixgbe_close_suspend(struct ixgbe_adapter *adapter)
6148 {
6149 ixgbe_ptp_suspend(adapter);
6150
6151 if (adapter->hw.phy.ops.enter_lplu) {
6152 adapter->hw.phy.reset_disable = true;
6153 ixgbe_down(adapter);
6154 adapter->hw.phy.ops.enter_lplu(&adapter->hw);
6155 adapter->hw.phy.reset_disable = false;
6156 } else {
6157 ixgbe_down(adapter);
6158 }
6159
6160 ixgbe_free_irq(adapter);
6161
6162 ixgbe_free_all_tx_resources(adapter);
6163 ixgbe_free_all_rx_resources(adapter);
6164 }
6165
6166 /**
6167 * ixgbe_close - Disables a network interface
6168 * @netdev: network interface device structure
6169 *
6170 * Returns 0, this is not allowed to fail
6171 *
6172 * The close entry point is called when an interface is de-activated
6173 * by the OS. The hardware is still under the drivers control, but
6174 * needs to be disabled. A global MAC reset is issued to stop the
6175 * hardware, and all transmit and receive resources are freed.
6176 **/
6177 int ixgbe_close(struct net_device *netdev)
6178 {
6179 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6180
6181 ixgbe_ptp_stop(adapter);
6182
6183 ixgbe_close_suspend(adapter);
6184
6185 ixgbe_fdir_filter_exit(adapter);
6186
6187 ixgbe_release_hw_control(adapter);
6188
6189 return 0;
6190 }
6191
6192 #ifdef CONFIG_PM
6193 static int ixgbe_resume(struct pci_dev *pdev)
6194 {
6195 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
6196 struct net_device *netdev = adapter->netdev;
6197 u32 err;
6198
6199 adapter->hw.hw_addr = adapter->io_addr;
6200 pci_set_power_state(pdev, PCI_D0);
6201 pci_restore_state(pdev);
6202 /*
6203 * pci_restore_state clears dev->state_saved so call
6204 * pci_save_state to restore it.
6205 */
6206 pci_save_state(pdev);
6207
6208 err = pci_enable_device_mem(pdev);
6209 if (err) {
6210 e_dev_err("Cannot enable PCI device from suspend\n");
6211 return err;
6212 }
6213 smp_mb__before_atomic();
6214 clear_bit(__IXGBE_DISABLED, &adapter->state);
6215 pci_set_master(pdev);
6216
6217 pci_wake_from_d3(pdev, false);
6218
6219 ixgbe_reset(adapter);
6220
6221 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
6222
6223 rtnl_lock();
6224 err = ixgbe_init_interrupt_scheme(adapter);
6225 if (!err && netif_running(netdev))
6226 err = ixgbe_open(netdev);
6227
6228 rtnl_unlock();
6229
6230 if (err)
6231 return err;
6232
6233 netif_device_attach(netdev);
6234
6235 return 0;
6236 }
6237 #endif /* CONFIG_PM */
6238
6239 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
6240 {
6241 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
6242 struct net_device *netdev = adapter->netdev;
6243 struct ixgbe_hw *hw = &adapter->hw;
6244 u32 ctrl, fctrl;
6245 u32 wufc = adapter->wol;
6246 #ifdef CONFIG_PM
6247 int retval = 0;
6248 #endif
6249
6250 netif_device_detach(netdev);
6251
6252 rtnl_lock();
6253 if (netif_running(netdev))
6254 ixgbe_close_suspend(adapter);
6255 rtnl_unlock();
6256
6257 ixgbe_clear_interrupt_scheme(adapter);
6258
6259 #ifdef CONFIG_PM
6260 retval = pci_save_state(pdev);
6261 if (retval)
6262 return retval;
6263
6264 #endif
6265 if (hw->mac.ops.stop_link_on_d3)
6266 hw->mac.ops.stop_link_on_d3(hw);
6267
6268 if (wufc) {
6269 ixgbe_set_rx_mode(netdev);
6270
6271 /* enable the optics for 82599 SFP+ fiber as we can WoL */
6272 if (hw->mac.ops.enable_tx_laser)
6273 hw->mac.ops.enable_tx_laser(hw);
6274
6275 /* turn on all-multi mode if wake on multicast is enabled */
6276 if (wufc & IXGBE_WUFC_MC) {
6277 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
6278 fctrl |= IXGBE_FCTRL_MPE;
6279 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
6280 }
6281
6282 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
6283 ctrl |= IXGBE_CTRL_GIO_DIS;
6284 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
6285
6286 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
6287 } else {
6288 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
6289 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
6290 }
6291
6292 switch (hw->mac.type) {
6293 case ixgbe_mac_82598EB:
6294 pci_wake_from_d3(pdev, false);
6295 break;
6296 case ixgbe_mac_82599EB:
6297 case ixgbe_mac_X540:
6298 case ixgbe_mac_X550:
6299 case ixgbe_mac_X550EM_x:
6300 case ixgbe_mac_x550em_a:
6301 pci_wake_from_d3(pdev, !!wufc);
6302 break;
6303 default:
6304 break;
6305 }
6306
6307 *enable_wake = !!wufc;
6308 if (hw->phy.ops.set_phy_power && !*enable_wake)
6309 hw->phy.ops.set_phy_power(hw, false);
6310
6311 ixgbe_release_hw_control(adapter);
6312
6313 if (!test_and_set_bit(__IXGBE_DISABLED, &adapter->state))
6314 pci_disable_device(pdev);
6315
6316 return 0;
6317 }
6318
6319 #ifdef CONFIG_PM
6320 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
6321 {
6322 int retval;
6323 bool wake;
6324
6325 retval = __ixgbe_shutdown(pdev, &wake);
6326 if (retval)
6327 return retval;
6328
6329 if (wake) {
6330 pci_prepare_to_sleep(pdev);
6331 } else {
6332 pci_wake_from_d3(pdev, false);
6333 pci_set_power_state(pdev, PCI_D3hot);
6334 }
6335
6336 return 0;
6337 }
6338 #endif /* CONFIG_PM */
6339
6340 static void ixgbe_shutdown(struct pci_dev *pdev)
6341 {
6342 bool wake;
6343
6344 __ixgbe_shutdown(pdev, &wake);
6345
6346 if (system_state == SYSTEM_POWER_OFF) {
6347 pci_wake_from_d3(pdev, wake);
6348 pci_set_power_state(pdev, PCI_D3hot);
6349 }
6350 }
6351
6352 /**
6353 * ixgbe_update_stats - Update the board statistics counters.
6354 * @adapter: board private structure
6355 **/
6356 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
6357 {
6358 struct net_device *netdev = adapter->netdev;
6359 struct ixgbe_hw *hw = &adapter->hw;
6360 struct ixgbe_hw_stats *hwstats = &adapter->stats;
6361 u64 total_mpc = 0;
6362 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
6363 u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
6364 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
6365 u64 bytes = 0, packets = 0, hw_csum_rx_error = 0;
6366
6367 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6368 test_bit(__IXGBE_RESETTING, &adapter->state))
6369 return;
6370
6371 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
6372 u64 rsc_count = 0;
6373 u64 rsc_flush = 0;
6374 for (i = 0; i < adapter->num_rx_queues; i++) {
6375 rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
6376 rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
6377 }
6378 adapter->rsc_total_count = rsc_count;
6379 adapter->rsc_total_flush = rsc_flush;
6380 }
6381
6382 for (i = 0; i < adapter->num_rx_queues; i++) {
6383 struct ixgbe_ring *rx_ring = adapter->rx_ring[i];
6384 non_eop_descs += rx_ring->rx_stats.non_eop_descs;
6385 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
6386 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
6387 hw_csum_rx_error += rx_ring->rx_stats.csum_err;
6388 bytes += rx_ring->stats.bytes;
6389 packets += rx_ring->stats.packets;
6390 }
6391 adapter->non_eop_descs = non_eop_descs;
6392 adapter->alloc_rx_page_failed = alloc_rx_page_failed;
6393 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
6394 adapter->hw_csum_rx_error = hw_csum_rx_error;
6395 netdev->stats.rx_bytes = bytes;
6396 netdev->stats.rx_packets = packets;
6397
6398 bytes = 0;
6399 packets = 0;
6400 /* gather some stats to the adapter struct that are per queue */
6401 for (i = 0; i < adapter->num_tx_queues; i++) {
6402 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
6403 restart_queue += tx_ring->tx_stats.restart_queue;
6404 tx_busy += tx_ring->tx_stats.tx_busy;
6405 bytes += tx_ring->stats.bytes;
6406 packets += tx_ring->stats.packets;
6407 }
6408 adapter->restart_queue = restart_queue;
6409 adapter->tx_busy = tx_busy;
6410 netdev->stats.tx_bytes = bytes;
6411 netdev->stats.tx_packets = packets;
6412
6413 hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
6414
6415 /* 8 register reads */
6416 for (i = 0; i < 8; i++) {
6417 /* for packet buffers not used, the register should read 0 */
6418 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
6419 missed_rx += mpc;
6420 hwstats->mpc[i] += mpc;
6421 total_mpc += hwstats->mpc[i];
6422 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
6423 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
6424 switch (hw->mac.type) {
6425 case ixgbe_mac_82598EB:
6426 hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
6427 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
6428 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
6429 hwstats->pxonrxc[i] +=
6430 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
6431 break;
6432 case ixgbe_mac_82599EB:
6433 case ixgbe_mac_X540:
6434 case ixgbe_mac_X550:
6435 case ixgbe_mac_X550EM_x:
6436 case ixgbe_mac_x550em_a:
6437 hwstats->pxonrxc[i] +=
6438 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
6439 break;
6440 default:
6441 break;
6442 }
6443 }
6444
6445 /*16 register reads */
6446 for (i = 0; i < 16; i++) {
6447 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
6448 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
6449 if ((hw->mac.type == ixgbe_mac_82599EB) ||
6450 (hw->mac.type == ixgbe_mac_X540) ||
6451 (hw->mac.type == ixgbe_mac_X550) ||
6452 (hw->mac.type == ixgbe_mac_X550EM_x) ||
6453 (hw->mac.type == ixgbe_mac_x550em_a)) {
6454 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
6455 IXGBE_READ_REG(hw, IXGBE_QBTC_H(i)); /* to clear */
6456 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC_L(i));
6457 IXGBE_READ_REG(hw, IXGBE_QBRC_H(i)); /* to clear */
6458 }
6459 }
6460
6461 hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
6462 /* work around hardware counting issue */
6463 hwstats->gprc -= missed_rx;
6464
6465 ixgbe_update_xoff_received(adapter);
6466
6467 /* 82598 hardware only has a 32 bit counter in the high register */
6468 switch (hw->mac.type) {
6469 case ixgbe_mac_82598EB:
6470 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
6471 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
6472 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
6473 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
6474 break;
6475 case ixgbe_mac_X540:
6476 case ixgbe_mac_X550:
6477 case ixgbe_mac_X550EM_x:
6478 case ixgbe_mac_x550em_a:
6479 /* OS2BMC stats are X540 and later */
6480 hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC);
6481 hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC);
6482 hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC);
6483 hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC);
6484 case ixgbe_mac_82599EB:
6485 for (i = 0; i < 16; i++)
6486 adapter->hw_rx_no_dma_resources +=
6487 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
6488 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
6489 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
6490 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
6491 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
6492 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
6493 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
6494 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
6495 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
6496 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
6497 #ifdef IXGBE_FCOE
6498 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
6499 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
6500 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
6501 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
6502 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
6503 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
6504 /* Add up per cpu counters for total ddp aloc fail */
6505 if (adapter->fcoe.ddp_pool) {
6506 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
6507 struct ixgbe_fcoe_ddp_pool *ddp_pool;
6508 unsigned int cpu;
6509 u64 noddp = 0, noddp_ext_buff = 0;
6510 for_each_possible_cpu(cpu) {
6511 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
6512 noddp += ddp_pool->noddp;
6513 noddp_ext_buff += ddp_pool->noddp_ext_buff;
6514 }
6515 hwstats->fcoe_noddp = noddp;
6516 hwstats->fcoe_noddp_ext_buff = noddp_ext_buff;
6517 }
6518 #endif /* IXGBE_FCOE */
6519 break;
6520 default:
6521 break;
6522 }
6523 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
6524 hwstats->bprc += bprc;
6525 hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
6526 if (hw->mac.type == ixgbe_mac_82598EB)
6527 hwstats->mprc -= bprc;
6528 hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
6529 hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
6530 hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
6531 hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
6532 hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
6533 hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
6534 hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
6535 hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
6536 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
6537 hwstats->lxontxc += lxon;
6538 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
6539 hwstats->lxofftxc += lxoff;
6540 hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
6541 hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
6542 /*
6543 * 82598 errata - tx of flow control packets is included in tx counters
6544 */
6545 xon_off_tot = lxon + lxoff;
6546 hwstats->gptc -= xon_off_tot;
6547 hwstats->mptc -= xon_off_tot;
6548 hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
6549 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
6550 hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
6551 hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
6552 hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
6553 hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
6554 hwstats->ptc64 -= xon_off_tot;
6555 hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
6556 hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
6557 hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
6558 hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
6559 hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
6560 hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
6561
6562 /* Fill out the OS statistics structure */
6563 netdev->stats.multicast = hwstats->mprc;
6564
6565 /* Rx Errors */
6566 netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
6567 netdev->stats.rx_dropped = 0;
6568 netdev->stats.rx_length_errors = hwstats->rlec;
6569 netdev->stats.rx_crc_errors = hwstats->crcerrs;
6570 netdev->stats.rx_missed_errors = total_mpc;
6571 }
6572
6573 /**
6574 * ixgbe_fdir_reinit_subtask - worker thread to reinit FDIR filter table
6575 * @adapter: pointer to the device adapter structure
6576 **/
6577 static void ixgbe_fdir_reinit_subtask(struct ixgbe_adapter *adapter)
6578 {
6579 struct ixgbe_hw *hw = &adapter->hw;
6580 int i;
6581
6582 if (!(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
6583 return;
6584
6585 adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
6586
6587 /* if interface is down do nothing */
6588 if (test_bit(__IXGBE_DOWN, &adapter->state))
6589 return;
6590
6591 /* do nothing if we are not using signature filters */
6592 if (!(adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE))
6593 return;
6594
6595 adapter->fdir_overflow++;
6596
6597 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
6598 for (i = 0; i < adapter->num_tx_queues; i++)
6599 set_bit(__IXGBE_TX_FDIR_INIT_DONE,
6600 &(adapter->tx_ring[i]->state));
6601 /* re-enable flow director interrupts */
6602 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
6603 } else {
6604 e_err(probe, "failed to finish FDIR re-initialization, "
6605 "ignored adding FDIR ATR filters\n");
6606 }
6607 }
6608
6609 /**
6610 * ixgbe_check_hang_subtask - check for hung queues and dropped interrupts
6611 * @adapter: pointer to the device adapter structure
6612 *
6613 * This function serves two purposes. First it strobes the interrupt lines
6614 * in order to make certain interrupts are occurring. Secondly it sets the
6615 * bits needed to check for TX hangs. As a result we should immediately
6616 * determine if a hang has occurred.
6617 */
6618 static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter)
6619 {
6620 struct ixgbe_hw *hw = &adapter->hw;
6621 u64 eics = 0;
6622 int i;
6623
6624 /* If we're down, removing or resetting, just bail */
6625 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6626 test_bit(__IXGBE_REMOVING, &adapter->state) ||
6627 test_bit(__IXGBE_RESETTING, &adapter->state))
6628 return;
6629
6630 /* Force detection of hung controller */
6631 if (netif_carrier_ok(adapter->netdev)) {
6632 for (i = 0; i < adapter->num_tx_queues; i++)
6633 set_check_for_tx_hang(adapter->tx_ring[i]);
6634 }
6635
6636 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
6637 /*
6638 * for legacy and MSI interrupts don't set any bits
6639 * that are enabled for EIAM, because this operation
6640 * would set *both* EIMS and EICS for any bit in EIAM
6641 */
6642 IXGBE_WRITE_REG(hw, IXGBE_EICS,
6643 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
6644 } else {
6645 /* get one bit for every active tx/rx interrupt vector */
6646 for (i = 0; i < adapter->num_q_vectors; i++) {
6647 struct ixgbe_q_vector *qv = adapter->q_vector[i];
6648 if (qv->rx.ring || qv->tx.ring)
6649 eics |= BIT_ULL(i);
6650 }
6651 }
6652
6653 /* Cause software interrupt to ensure rings are cleaned */
6654 ixgbe_irq_rearm_queues(adapter, eics);
6655 }
6656
6657 /**
6658 * ixgbe_watchdog_update_link - update the link status
6659 * @adapter: pointer to the device adapter structure
6660 * @link_speed: pointer to a u32 to store the link_speed
6661 **/
6662 static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter)
6663 {
6664 struct ixgbe_hw *hw = &adapter->hw;
6665 u32 link_speed = adapter->link_speed;
6666 bool link_up = adapter->link_up;
6667 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
6668
6669 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
6670 return;
6671
6672 if (hw->mac.ops.check_link) {
6673 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
6674 } else {
6675 /* always assume link is up, if no check link function */
6676 link_speed = IXGBE_LINK_SPEED_10GB_FULL;
6677 link_up = true;
6678 }
6679
6680 /* If Crosstalk fix enabled do the sanity check of making sure
6681 * the SFP+ cage is empty.
6682 */
6683 if (adapter->need_crosstalk_fix) {
6684 u32 sfp_cage_full;
6685
6686 sfp_cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) &
6687 IXGBE_ESDP_SDP2;
6688 if (ixgbe_is_sfp(hw) && link_up && !sfp_cage_full)
6689 link_up = false;
6690 }
6691
6692 if (adapter->ixgbe_ieee_pfc)
6693 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
6694
6695 if (link_up && !((adapter->flags & IXGBE_FLAG_DCB_ENABLED) && pfc_en)) {
6696 hw->mac.ops.fc_enable(hw);
6697 ixgbe_set_rx_drop_en(adapter);
6698 }
6699
6700 if (link_up ||
6701 time_after(jiffies, (adapter->link_check_timeout +
6702 IXGBE_TRY_LINK_TIMEOUT))) {
6703 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
6704 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
6705 IXGBE_WRITE_FLUSH(hw);
6706 }
6707
6708 adapter->link_up = link_up;
6709 adapter->link_speed = link_speed;
6710 }
6711
6712 static void ixgbe_update_default_up(struct ixgbe_adapter *adapter)
6713 {
6714 #ifdef CONFIG_IXGBE_DCB
6715 struct net_device *netdev = adapter->netdev;
6716 struct dcb_app app = {
6717 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE,
6718 .protocol = 0,
6719 };
6720 u8 up = 0;
6721
6722 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE)
6723 up = dcb_ieee_getapp_mask(netdev, &app);
6724
6725 adapter->default_up = (up > 1) ? (ffs(up) - 1) : 0;
6726 #endif
6727 }
6728
6729 /**
6730 * ixgbe_watchdog_link_is_up - update netif_carrier status and
6731 * print link up message
6732 * @adapter: pointer to the device adapter structure
6733 **/
6734 static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
6735 {
6736 struct net_device *netdev = adapter->netdev;
6737 struct ixgbe_hw *hw = &adapter->hw;
6738 struct net_device *upper;
6739 struct list_head *iter;
6740 u32 link_speed = adapter->link_speed;
6741 const char *speed_str;
6742 bool flow_rx, flow_tx;
6743
6744 /* only continue if link was previously down */
6745 if (netif_carrier_ok(netdev))
6746 return;
6747
6748 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
6749
6750 switch (hw->mac.type) {
6751 case ixgbe_mac_82598EB: {
6752 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
6753 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
6754 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
6755 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
6756 }
6757 break;
6758 case ixgbe_mac_X540:
6759 case ixgbe_mac_X550:
6760 case ixgbe_mac_X550EM_x:
6761 case ixgbe_mac_x550em_a:
6762 case ixgbe_mac_82599EB: {
6763 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
6764 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
6765 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
6766 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
6767 }
6768 break;
6769 default:
6770 flow_tx = false;
6771 flow_rx = false;
6772 break;
6773 }
6774
6775 adapter->last_rx_ptp_check = jiffies;
6776
6777 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
6778 ixgbe_ptp_start_cyclecounter(adapter);
6779
6780 switch (link_speed) {
6781 case IXGBE_LINK_SPEED_10GB_FULL:
6782 speed_str = "10 Gbps";
6783 break;
6784 case IXGBE_LINK_SPEED_2_5GB_FULL:
6785 speed_str = "2.5 Gbps";
6786 break;
6787 case IXGBE_LINK_SPEED_1GB_FULL:
6788 speed_str = "1 Gbps";
6789 break;
6790 case IXGBE_LINK_SPEED_100_FULL:
6791 speed_str = "100 Mbps";
6792 break;
6793 default:
6794 speed_str = "unknown speed";
6795 break;
6796 }
6797 e_info(drv, "NIC Link is Up %s, Flow Control: %s\n", speed_str,
6798 ((flow_rx && flow_tx) ? "RX/TX" :
6799 (flow_rx ? "RX" :
6800 (flow_tx ? "TX" : "None"))));
6801
6802 netif_carrier_on(netdev);
6803 ixgbe_check_vf_rate_limit(adapter);
6804
6805 /* enable transmits */
6806 netif_tx_wake_all_queues(adapter->netdev);
6807
6808 /* enable any upper devices */
6809 rtnl_lock();
6810 netdev_for_each_all_upper_dev_rcu(adapter->netdev, upper, iter) {
6811 if (netif_is_macvlan(upper)) {
6812 struct macvlan_dev *vlan = netdev_priv(upper);
6813
6814 if (vlan->fwd_priv)
6815 netif_tx_wake_all_queues(upper);
6816 }
6817 }
6818 rtnl_unlock();
6819
6820 /* update the default user priority for VFs */
6821 ixgbe_update_default_up(adapter);
6822
6823 /* ping all the active vfs to let them know link has changed */
6824 ixgbe_ping_all_vfs(adapter);
6825 }
6826
6827 /**
6828 * ixgbe_watchdog_link_is_down - update netif_carrier status and
6829 * print link down message
6830 * @adapter: pointer to the adapter structure
6831 **/
6832 static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter *adapter)
6833 {
6834 struct net_device *netdev = adapter->netdev;
6835 struct ixgbe_hw *hw = &adapter->hw;
6836
6837 adapter->link_up = false;
6838 adapter->link_speed = 0;
6839
6840 /* only continue if link was up previously */
6841 if (!netif_carrier_ok(netdev))
6842 return;
6843
6844 /* poll for SFP+ cable when link is down */
6845 if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB)
6846 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
6847
6848 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
6849 ixgbe_ptp_start_cyclecounter(adapter);
6850
6851 e_info(drv, "NIC Link is Down\n");
6852 netif_carrier_off(netdev);
6853
6854 /* ping all the active vfs to let them know link has changed */
6855 ixgbe_ping_all_vfs(adapter);
6856 }
6857
6858 static bool ixgbe_ring_tx_pending(struct ixgbe_adapter *adapter)
6859 {
6860 int i;
6861
6862 for (i = 0; i < adapter->num_tx_queues; i++) {
6863 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
6864
6865 if (tx_ring->next_to_use != tx_ring->next_to_clean)
6866 return true;
6867 }
6868
6869 return false;
6870 }
6871
6872 static bool ixgbe_vf_tx_pending(struct ixgbe_adapter *adapter)
6873 {
6874 struct ixgbe_hw *hw = &adapter->hw;
6875 struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ];
6876 u32 q_per_pool = __ALIGN_MASK(1, ~vmdq->mask);
6877
6878 int i, j;
6879
6880 if (!adapter->num_vfs)
6881 return false;
6882
6883 /* resetting the PF is only needed for MAC before X550 */
6884 if (hw->mac.type >= ixgbe_mac_X550)
6885 return false;
6886
6887 for (i = 0; i < adapter->num_vfs; i++) {
6888 for (j = 0; j < q_per_pool; j++) {
6889 u32 h, t;
6890
6891 h = IXGBE_READ_REG(hw, IXGBE_PVFTDHN(q_per_pool, i, j));
6892 t = IXGBE_READ_REG(hw, IXGBE_PVFTDTN(q_per_pool, i, j));
6893
6894 if (h != t)
6895 return true;
6896 }
6897 }
6898
6899 return false;
6900 }
6901
6902 /**
6903 * ixgbe_watchdog_flush_tx - flush queues on link down
6904 * @adapter: pointer to the device adapter structure
6905 **/
6906 static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter)
6907 {
6908 if (!netif_carrier_ok(adapter->netdev)) {
6909 if (ixgbe_ring_tx_pending(adapter) ||
6910 ixgbe_vf_tx_pending(adapter)) {
6911 /* We've lost link, so the controller stops DMA,
6912 * but we've got queued Tx work that's never going
6913 * to get done, so reset controller to flush Tx.
6914 * (Do the reset outside of interrupt context).
6915 */
6916 e_warn(drv, "initiating reset to clear Tx work after link loss\n");
6917 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
6918 }
6919 }
6920 }
6921
6922 #ifdef CONFIG_PCI_IOV
6923 static inline void ixgbe_issue_vf_flr(struct ixgbe_adapter *adapter,
6924 struct pci_dev *vfdev)
6925 {
6926 if (!pci_wait_for_pending_transaction(vfdev))
6927 e_dev_warn("Issuing VFLR with pending transactions\n");
6928
6929 e_dev_err("Issuing VFLR for VF %s\n", pci_name(vfdev));
6930 pcie_capability_set_word(vfdev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR);
6931
6932 msleep(100);
6933 }
6934
6935 static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter)
6936 {
6937 struct ixgbe_hw *hw = &adapter->hw;
6938 struct pci_dev *pdev = adapter->pdev;
6939 unsigned int vf;
6940 u32 gpc;
6941
6942 if (!(netif_carrier_ok(adapter->netdev)))
6943 return;
6944
6945 gpc = IXGBE_READ_REG(hw, IXGBE_TXDGPC);
6946 if (gpc) /* If incrementing then no need for the check below */
6947 return;
6948 /* Check to see if a bad DMA write target from an errant or
6949 * malicious VF has caused a PCIe error. If so then we can
6950 * issue a VFLR to the offending VF(s) and then resume without
6951 * requesting a full slot reset.
6952 */
6953
6954 if (!pdev)
6955 return;
6956
6957 /* check status reg for all VFs owned by this PF */
6958 for (vf = 0; vf < adapter->num_vfs; ++vf) {
6959 struct pci_dev *vfdev = adapter->vfinfo[vf].vfdev;
6960 u16 status_reg;
6961
6962 if (!vfdev)
6963 continue;
6964 pci_read_config_word(vfdev, PCI_STATUS, &status_reg);
6965 if (status_reg != IXGBE_FAILED_READ_CFG_WORD &&
6966 status_reg & PCI_STATUS_REC_MASTER_ABORT)
6967 ixgbe_issue_vf_flr(adapter, vfdev);
6968 }
6969 }
6970
6971 static void ixgbe_spoof_check(struct ixgbe_adapter *adapter)
6972 {
6973 u32 ssvpc;
6974
6975 /* Do not perform spoof check for 82598 or if not in IOV mode */
6976 if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
6977 adapter->num_vfs == 0)
6978 return;
6979
6980 ssvpc = IXGBE_READ_REG(&adapter->hw, IXGBE_SSVPC);
6981
6982 /*
6983 * ssvpc register is cleared on read, if zero then no
6984 * spoofed packets in the last interval.
6985 */
6986 if (!ssvpc)
6987 return;
6988
6989 e_warn(drv, "%u Spoofed packets detected\n", ssvpc);
6990 }
6991 #else
6992 static void ixgbe_spoof_check(struct ixgbe_adapter __always_unused *adapter)
6993 {
6994 }
6995
6996 static void
6997 ixgbe_check_for_bad_vf(struct ixgbe_adapter __always_unused *adapter)
6998 {
6999 }
7000 #endif /* CONFIG_PCI_IOV */
7001
7002
7003 /**
7004 * ixgbe_watchdog_subtask - check and bring link up
7005 * @adapter: pointer to the device adapter structure
7006 **/
7007 static void ixgbe_watchdog_subtask(struct ixgbe_adapter *adapter)
7008 {
7009 /* if interface is down, removing or resetting, do nothing */
7010 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
7011 test_bit(__IXGBE_REMOVING, &adapter->state) ||
7012 test_bit(__IXGBE_RESETTING, &adapter->state))
7013 return;
7014
7015 ixgbe_watchdog_update_link(adapter);
7016
7017 if (adapter->link_up)
7018 ixgbe_watchdog_link_is_up(adapter);
7019 else
7020 ixgbe_watchdog_link_is_down(adapter);
7021
7022 ixgbe_check_for_bad_vf(adapter);
7023 ixgbe_spoof_check(adapter);
7024 ixgbe_update_stats(adapter);
7025
7026 ixgbe_watchdog_flush_tx(adapter);
7027 }
7028
7029 /**
7030 * ixgbe_sfp_detection_subtask - poll for SFP+ cable
7031 * @adapter: the ixgbe adapter structure
7032 **/
7033 static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter)
7034 {
7035 struct ixgbe_hw *hw = &adapter->hw;
7036 s32 err;
7037
7038 /* If crosstalk fix enabled verify the SFP+ cage is full */
7039 if (adapter->need_crosstalk_fix) {
7040 u32 sfp_cage_full;
7041
7042 sfp_cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) &
7043 IXGBE_ESDP_SDP2;
7044 if (!sfp_cage_full)
7045 return;
7046 }
7047
7048 /* not searching for SFP so there is nothing to do here */
7049 if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) &&
7050 !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
7051 return;
7052
7053 if (adapter->sfp_poll_time &&
7054 time_after(adapter->sfp_poll_time, jiffies))
7055 return; /* If not yet time to poll for SFP */
7056
7057 /* someone else is in init, wait until next service event */
7058 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
7059 return;
7060
7061 adapter->sfp_poll_time = jiffies + IXGBE_SFP_POLL_JIFFIES - 1;
7062
7063 err = hw->phy.ops.identify_sfp(hw);
7064 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
7065 goto sfp_out;
7066
7067 if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
7068 /* If no cable is present, then we need to reset
7069 * the next time we find a good cable. */
7070 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
7071 }
7072
7073 /* exit on error */
7074 if (err)
7075 goto sfp_out;
7076
7077 /* exit if reset not needed */
7078 if (!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
7079 goto sfp_out;
7080
7081 adapter->flags2 &= ~IXGBE_FLAG2_SFP_NEEDS_RESET;
7082
7083 /*
7084 * A module may be identified correctly, but the EEPROM may not have
7085 * support for that module. setup_sfp() will fail in that case, so
7086 * we should not allow that module to load.
7087 */
7088 if (hw->mac.type == ixgbe_mac_82598EB)
7089 err = hw->phy.ops.reset(hw);
7090 else
7091 err = hw->mac.ops.setup_sfp(hw);
7092
7093 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
7094 goto sfp_out;
7095
7096 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
7097 e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
7098
7099 sfp_out:
7100 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
7101
7102 if ((err == IXGBE_ERR_SFP_NOT_SUPPORTED) &&
7103 (adapter->netdev->reg_state == NETREG_REGISTERED)) {
7104 e_dev_err("failed to initialize because an unsupported "
7105 "SFP+ module type was detected.\n");
7106 e_dev_err("Reload the driver after installing a "
7107 "supported module.\n");
7108 unregister_netdev(adapter->netdev);
7109 }
7110 }
7111
7112 /**
7113 * ixgbe_sfp_link_config_subtask - set up link SFP after module install
7114 * @adapter: the ixgbe adapter structure
7115 **/
7116 static void ixgbe_sfp_link_config_subtask(struct ixgbe_adapter *adapter)
7117 {
7118 struct ixgbe_hw *hw = &adapter->hw;
7119 u32 speed;
7120 bool autoneg = false;
7121
7122 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_CONFIG))
7123 return;
7124
7125 /* someone else is in init, wait until next service event */
7126 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
7127 return;
7128
7129 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
7130
7131 speed = hw->phy.autoneg_advertised;
7132 if ((!speed) && (hw->mac.ops.get_link_capabilities)) {
7133 hw->mac.ops.get_link_capabilities(hw, &speed, &autoneg);
7134
7135 /* setup the highest link when no autoneg */
7136 if (!autoneg) {
7137 if (speed & IXGBE_LINK_SPEED_10GB_FULL)
7138 speed = IXGBE_LINK_SPEED_10GB_FULL;
7139 }
7140 }
7141
7142 if (hw->mac.ops.setup_link)
7143 hw->mac.ops.setup_link(hw, speed, true);
7144
7145 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
7146 adapter->link_check_timeout = jiffies;
7147 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
7148 }
7149
7150 /**
7151 * ixgbe_service_timer - Timer Call-back
7152 * @data: pointer to adapter cast into an unsigned long
7153 **/
7154 static void ixgbe_service_timer(unsigned long data)
7155 {
7156 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
7157 unsigned long next_event_offset;
7158
7159 /* poll faster when waiting for link */
7160 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
7161 next_event_offset = HZ / 10;
7162 else
7163 next_event_offset = HZ * 2;
7164
7165 /* Reset the timer */
7166 mod_timer(&adapter->service_timer, next_event_offset + jiffies);
7167
7168 ixgbe_service_event_schedule(adapter);
7169 }
7170
7171 static void ixgbe_phy_interrupt_subtask(struct ixgbe_adapter *adapter)
7172 {
7173 struct ixgbe_hw *hw = &adapter->hw;
7174 u32 status;
7175
7176 if (!(adapter->flags2 & IXGBE_FLAG2_PHY_INTERRUPT))
7177 return;
7178
7179 adapter->flags2 &= ~IXGBE_FLAG2_PHY_INTERRUPT;
7180
7181 if (!hw->phy.ops.handle_lasi)
7182 return;
7183
7184 status = hw->phy.ops.handle_lasi(&adapter->hw);
7185 if (status != IXGBE_ERR_OVERTEMP)
7186 return;
7187
7188 e_crit(drv, "%s\n", ixgbe_overheat_msg);
7189 }
7190
7191 static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter)
7192 {
7193 if (!(adapter->flags2 & IXGBE_FLAG2_RESET_REQUESTED))
7194 return;
7195
7196 adapter->flags2 &= ~IXGBE_FLAG2_RESET_REQUESTED;
7197
7198 /* If we're already down, removing or resetting, just bail */
7199 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
7200 test_bit(__IXGBE_REMOVING, &adapter->state) ||
7201 test_bit(__IXGBE_RESETTING, &adapter->state))
7202 return;
7203
7204 ixgbe_dump(adapter);
7205 netdev_err(adapter->netdev, "Reset adapter\n");
7206 adapter->tx_timeout_count++;
7207
7208 rtnl_lock();
7209 ixgbe_reinit_locked(adapter);
7210 rtnl_unlock();
7211 }
7212
7213 /**
7214 * ixgbe_service_task - manages and runs subtasks
7215 * @work: pointer to work_struct containing our data
7216 **/
7217 static void ixgbe_service_task(struct work_struct *work)
7218 {
7219 struct ixgbe_adapter *adapter = container_of(work,
7220 struct ixgbe_adapter,
7221 service_task);
7222 if (ixgbe_removed(adapter->hw.hw_addr)) {
7223 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
7224 rtnl_lock();
7225 ixgbe_down(adapter);
7226 rtnl_unlock();
7227 }
7228 ixgbe_service_event_complete(adapter);
7229 return;
7230 }
7231 #ifdef CONFIG_IXGBE_VXLAN
7232 rtnl_lock();
7233 if (adapter->flags2 & IXGBE_FLAG2_VXLAN_REREG_NEEDED) {
7234 adapter->flags2 &= ~IXGBE_FLAG2_VXLAN_REREG_NEEDED;
7235 vxlan_get_rx_port(adapter->netdev);
7236 }
7237 rtnl_unlock();
7238 #endif /* CONFIG_IXGBE_VXLAN */
7239 ixgbe_reset_subtask(adapter);
7240 ixgbe_phy_interrupt_subtask(adapter);
7241 ixgbe_sfp_detection_subtask(adapter);
7242 ixgbe_sfp_link_config_subtask(adapter);
7243 ixgbe_check_overtemp_subtask(adapter);
7244 ixgbe_watchdog_subtask(adapter);
7245 ixgbe_fdir_reinit_subtask(adapter);
7246 ixgbe_check_hang_subtask(adapter);
7247
7248 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state)) {
7249 ixgbe_ptp_overflow_check(adapter);
7250 ixgbe_ptp_rx_hang(adapter);
7251 }
7252
7253 ixgbe_service_event_complete(adapter);
7254 }
7255
7256 static int ixgbe_tso(struct ixgbe_ring *tx_ring,
7257 struct ixgbe_tx_buffer *first,
7258 u8 *hdr_len)
7259 {
7260 u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
7261 struct sk_buff *skb = first->skb;
7262 union {
7263 struct iphdr *v4;
7264 struct ipv6hdr *v6;
7265 unsigned char *hdr;
7266 } ip;
7267 union {
7268 struct tcphdr *tcp;
7269 unsigned char *hdr;
7270 } l4;
7271 u32 paylen, l4_offset;
7272 int err;
7273
7274 if (skb->ip_summed != CHECKSUM_PARTIAL)
7275 return 0;
7276
7277 if (!skb_is_gso(skb))
7278 return 0;
7279
7280 err = skb_cow_head(skb, 0);
7281 if (err < 0)
7282 return err;
7283
7284 ip.hdr = skb_network_header(skb);
7285 l4.hdr = skb_checksum_start(skb);
7286
7287 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
7288 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
7289
7290 /* initialize outer IP header fields */
7291 if (ip.v4->version == 4) {
7292 /* IP header will have to cancel out any data that
7293 * is not a part of the outer IP header
7294 */
7295 ip.v4->check = csum_fold(csum_add(lco_csum(skb),
7296 csum_unfold(l4.tcp->check)));
7297 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
7298
7299 ip.v4->tot_len = 0;
7300 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
7301 IXGBE_TX_FLAGS_CSUM |
7302 IXGBE_TX_FLAGS_IPV4;
7303 } else {
7304 ip.v6->payload_len = 0;
7305 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
7306 IXGBE_TX_FLAGS_CSUM;
7307 }
7308
7309 /* determine offset of inner transport header */
7310 l4_offset = l4.hdr - skb->data;
7311
7312 /* compute length of segmentation header */
7313 *hdr_len = (l4.tcp->doff * 4) + l4_offset;
7314
7315 /* remove payload length from inner checksum */
7316 paylen = skb->len - l4_offset;
7317 csum_replace_by_diff(&l4.tcp->check, htonl(paylen));
7318
7319 /* update gso size and bytecount with header size */
7320 first->gso_segs = skb_shinfo(skb)->gso_segs;
7321 first->bytecount += (first->gso_segs - 1) * *hdr_len;
7322
7323 /* mss_l4len_id: use 0 as index for TSO */
7324 mss_l4len_idx = (*hdr_len - l4_offset) << IXGBE_ADVTXD_L4LEN_SHIFT;
7325 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
7326
7327 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
7328 vlan_macip_lens = l4.hdr - ip.hdr;
7329 vlan_macip_lens |= (ip.hdr - skb->data) << IXGBE_ADVTXD_MACLEN_SHIFT;
7330 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
7331
7332 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, type_tucmd,
7333 mss_l4len_idx);
7334
7335 return 1;
7336 }
7337
7338 static inline bool ixgbe_ipv6_csum_is_sctp(struct sk_buff *skb)
7339 {
7340 unsigned int offset = 0;
7341
7342 ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL);
7343
7344 return offset == skb_checksum_start_offset(skb);
7345 }
7346
7347 static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
7348 struct ixgbe_tx_buffer *first)
7349 {
7350 struct sk_buff *skb = first->skb;
7351 u32 vlan_macip_lens = 0;
7352 u32 type_tucmd = 0;
7353
7354 if (skb->ip_summed != CHECKSUM_PARTIAL) {
7355 csum_failed:
7356 if (!(first->tx_flags & (IXGBE_TX_FLAGS_HW_VLAN |
7357 IXGBE_TX_FLAGS_CC)))
7358 return;
7359 goto no_csum;
7360 }
7361
7362 switch (skb->csum_offset) {
7363 case offsetof(struct tcphdr, check):
7364 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
7365 /* fall through */
7366 case offsetof(struct udphdr, check):
7367 break;
7368 case offsetof(struct sctphdr, checksum):
7369 /* validate that this is actually an SCTP request */
7370 if (((first->protocol == htons(ETH_P_IP)) &&
7371 (ip_hdr(skb)->protocol == IPPROTO_SCTP)) ||
7372 ((first->protocol == htons(ETH_P_IPV6)) &&
7373 ixgbe_ipv6_csum_is_sctp(skb))) {
7374 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_SCTP;
7375 break;
7376 }
7377 /* fall through */
7378 default:
7379 skb_checksum_help(skb);
7380 goto csum_failed;
7381 }
7382
7383 /* update TX checksum flag */
7384 first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
7385 vlan_macip_lens = skb_checksum_start_offset(skb) -
7386 skb_network_offset(skb);
7387 no_csum:
7388 /* vlan_macip_lens: MACLEN, VLAN tag */
7389 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
7390 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
7391
7392 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, type_tucmd, 0);
7393 }
7394
7395 #define IXGBE_SET_FLAG(_input, _flag, _result) \
7396 ((_flag <= _result) ? \
7397 ((u32)(_input & _flag) * (_result / _flag)) : \
7398 ((u32)(_input & _flag) / (_flag / _result)))
7399
7400 static u32 ixgbe_tx_cmd_type(struct sk_buff *skb, u32 tx_flags)
7401 {
7402 /* set type for advanced descriptor with frame checksum insertion */
7403 u32 cmd_type = IXGBE_ADVTXD_DTYP_DATA |
7404 IXGBE_ADVTXD_DCMD_DEXT |
7405 IXGBE_ADVTXD_DCMD_IFCS;
7406
7407 /* set HW vlan bit if vlan is present */
7408 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_HW_VLAN,
7409 IXGBE_ADVTXD_DCMD_VLE);
7410
7411 /* set segmentation enable bits for TSO/FSO */
7412 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSO,
7413 IXGBE_ADVTXD_DCMD_TSE);
7414
7415 /* set timestamp bit if present */
7416 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSTAMP,
7417 IXGBE_ADVTXD_MAC_TSTAMP);
7418
7419 /* insert frame checksum */
7420 cmd_type ^= IXGBE_SET_FLAG(skb->no_fcs, 1, IXGBE_ADVTXD_DCMD_IFCS);
7421
7422 return cmd_type;
7423 }
7424
7425 static void ixgbe_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
7426 u32 tx_flags, unsigned int paylen)
7427 {
7428 u32 olinfo_status = paylen << IXGBE_ADVTXD_PAYLEN_SHIFT;
7429
7430 /* enable L4 checksum for TSO and TX checksum offload */
7431 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
7432 IXGBE_TX_FLAGS_CSUM,
7433 IXGBE_ADVTXD_POPTS_TXSM);
7434
7435 /* enble IPv4 checksum for TSO */
7436 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
7437 IXGBE_TX_FLAGS_IPV4,
7438 IXGBE_ADVTXD_POPTS_IXSM);
7439
7440 /*
7441 * Check Context must be set if Tx switch is enabled, which it
7442 * always is for case where virtual functions are running
7443 */
7444 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
7445 IXGBE_TX_FLAGS_CC,
7446 IXGBE_ADVTXD_CC);
7447
7448 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
7449 }
7450
7451 static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
7452 {
7453 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
7454
7455 /* Herbert's original patch had:
7456 * smp_mb__after_netif_stop_queue();
7457 * but since that doesn't exist yet, just open code it.
7458 */
7459 smp_mb();
7460
7461 /* We need to check again in a case another CPU has just
7462 * made room available.
7463 */
7464 if (likely(ixgbe_desc_unused(tx_ring) < size))
7465 return -EBUSY;
7466
7467 /* A reprieve! - use start_queue because it doesn't call schedule */
7468 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
7469 ++tx_ring->tx_stats.restart_queue;
7470 return 0;
7471 }
7472
7473 static inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
7474 {
7475 if (likely(ixgbe_desc_unused(tx_ring) >= size))
7476 return 0;
7477
7478 return __ixgbe_maybe_stop_tx(tx_ring, size);
7479 }
7480
7481 #define IXGBE_TXD_CMD (IXGBE_TXD_CMD_EOP | \
7482 IXGBE_TXD_CMD_RS)
7483
7484 static void ixgbe_tx_map(struct ixgbe_ring *tx_ring,
7485 struct ixgbe_tx_buffer *first,
7486 const u8 hdr_len)
7487 {
7488 struct sk_buff *skb = first->skb;
7489 struct ixgbe_tx_buffer *tx_buffer;
7490 union ixgbe_adv_tx_desc *tx_desc;
7491 struct skb_frag_struct *frag;
7492 dma_addr_t dma;
7493 unsigned int data_len, size;
7494 u32 tx_flags = first->tx_flags;
7495 u32 cmd_type = ixgbe_tx_cmd_type(skb, tx_flags);
7496 u16 i = tx_ring->next_to_use;
7497
7498 tx_desc = IXGBE_TX_DESC(tx_ring, i);
7499
7500 ixgbe_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);
7501
7502 size = skb_headlen(skb);
7503 data_len = skb->data_len;
7504
7505 #ifdef IXGBE_FCOE
7506 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
7507 if (data_len < sizeof(struct fcoe_crc_eof)) {
7508 size -= sizeof(struct fcoe_crc_eof) - data_len;
7509 data_len = 0;
7510 } else {
7511 data_len -= sizeof(struct fcoe_crc_eof);
7512 }
7513 }
7514
7515 #endif
7516 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
7517
7518 tx_buffer = first;
7519
7520 for (frag = &skb_shinfo(skb)->frags[0];; frag++) {
7521 if (dma_mapping_error(tx_ring->dev, dma))
7522 goto dma_error;
7523
7524 /* record length, and DMA address */
7525 dma_unmap_len_set(tx_buffer, len, size);
7526 dma_unmap_addr_set(tx_buffer, dma, dma);
7527
7528 tx_desc->read.buffer_addr = cpu_to_le64(dma);
7529
7530 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
7531 tx_desc->read.cmd_type_len =
7532 cpu_to_le32(cmd_type ^ IXGBE_MAX_DATA_PER_TXD);
7533
7534 i++;
7535 tx_desc++;
7536 if (i == tx_ring->count) {
7537 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
7538 i = 0;
7539 }
7540 tx_desc->read.olinfo_status = 0;
7541
7542 dma += IXGBE_MAX_DATA_PER_TXD;
7543 size -= IXGBE_MAX_DATA_PER_TXD;
7544
7545 tx_desc->read.buffer_addr = cpu_to_le64(dma);
7546 }
7547
7548 if (likely(!data_len))
7549 break;
7550
7551 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type ^ size);
7552
7553 i++;
7554 tx_desc++;
7555 if (i == tx_ring->count) {
7556 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
7557 i = 0;
7558 }
7559 tx_desc->read.olinfo_status = 0;
7560
7561 #ifdef IXGBE_FCOE
7562 size = min_t(unsigned int, data_len, skb_frag_size(frag));
7563 #else
7564 size = skb_frag_size(frag);
7565 #endif
7566 data_len -= size;
7567
7568 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
7569 DMA_TO_DEVICE);
7570
7571 tx_buffer = &tx_ring->tx_buffer_info[i];
7572 }
7573
7574 /* write last descriptor with RS and EOP bits */
7575 cmd_type |= size | IXGBE_TXD_CMD;
7576 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
7577
7578 netdev_tx_sent_queue(txring_txq(tx_ring), first->bytecount);
7579
7580 /* set the timestamp */
7581 first->time_stamp = jiffies;
7582
7583 /*
7584 * Force memory writes to complete before letting h/w know there
7585 * are new descriptors to fetch. (Only applicable for weak-ordered
7586 * memory model archs, such as IA-64).
7587 *
7588 * We also need this memory barrier to make certain all of the
7589 * status bits have been updated before next_to_watch is written.
7590 */
7591 wmb();
7592
7593 /* set next_to_watch value indicating a packet is present */
7594 first->next_to_watch = tx_desc;
7595
7596 i++;
7597 if (i == tx_ring->count)
7598 i = 0;
7599
7600 tx_ring->next_to_use = i;
7601
7602 ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);
7603
7604 if (netif_xmit_stopped(txring_txq(tx_ring)) || !skb->xmit_more) {
7605 writel(i, tx_ring->tail);
7606
7607 /* we need this if more than one processor can write to our tail
7608 * at a time, it synchronizes IO on IA64/Altix systems
7609 */
7610 mmiowb();
7611 }
7612
7613 return;
7614 dma_error:
7615 dev_err(tx_ring->dev, "TX DMA map failed\n");
7616
7617 /* clear dma mappings for failed tx_buffer_info map */
7618 for (;;) {
7619 tx_buffer = &tx_ring->tx_buffer_info[i];
7620 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer);
7621 if (tx_buffer == first)
7622 break;
7623 if (i == 0)
7624 i = tx_ring->count;
7625 i--;
7626 }
7627
7628 tx_ring->next_to_use = i;
7629 }
7630
7631 static void ixgbe_atr(struct ixgbe_ring *ring,
7632 struct ixgbe_tx_buffer *first)
7633 {
7634 struct ixgbe_q_vector *q_vector = ring->q_vector;
7635 union ixgbe_atr_hash_dword input = { .dword = 0 };
7636 union ixgbe_atr_hash_dword common = { .dword = 0 };
7637 union {
7638 unsigned char *network;
7639 struct iphdr *ipv4;
7640 struct ipv6hdr *ipv6;
7641 } hdr;
7642 struct tcphdr *th;
7643 unsigned int hlen;
7644 struct sk_buff *skb;
7645 __be16 vlan_id;
7646 int l4_proto;
7647
7648 /* if ring doesn't have a interrupt vector, cannot perform ATR */
7649 if (!q_vector)
7650 return;
7651
7652 /* do nothing if sampling is disabled */
7653 if (!ring->atr_sample_rate)
7654 return;
7655
7656 ring->atr_count++;
7657
7658 /* currently only IPv4/IPv6 with TCP is supported */
7659 if ((first->protocol != htons(ETH_P_IP)) &&
7660 (first->protocol != htons(ETH_P_IPV6)))
7661 return;
7662
7663 /* snag network header to get L4 type and address */
7664 skb = first->skb;
7665 hdr.network = skb_network_header(skb);
7666 #ifdef CONFIG_IXGBE_VXLAN
7667 if (skb->encapsulation &&
7668 first->protocol == htons(ETH_P_IP) &&
7669 hdr.ipv4->protocol != IPPROTO_UDP) {
7670 struct ixgbe_adapter *adapter = q_vector->adapter;
7671
7672 /* verify the port is recognized as VXLAN */
7673 if (adapter->vxlan_port &&
7674 udp_hdr(skb)->dest == adapter->vxlan_port)
7675 hdr.network = skb_inner_network_header(skb);
7676 }
7677 #endif /* CONFIG_IXGBE_VXLAN */
7678
7679 /* Currently only IPv4/IPv6 with TCP is supported */
7680 switch (hdr.ipv4->version) {
7681 case IPVERSION:
7682 /* access ihl as u8 to avoid unaligned access on ia64 */
7683 hlen = (hdr.network[0] & 0x0F) << 2;
7684 l4_proto = hdr.ipv4->protocol;
7685 break;
7686 case 6:
7687 hlen = hdr.network - skb->data;
7688 l4_proto = ipv6_find_hdr(skb, &hlen, IPPROTO_TCP, NULL, NULL);
7689 hlen -= hdr.network - skb->data;
7690 break;
7691 default:
7692 return;
7693 }
7694
7695 if (l4_proto != IPPROTO_TCP)
7696 return;
7697
7698 th = (struct tcphdr *)(hdr.network + hlen);
7699
7700 /* skip this packet since the socket is closing */
7701 if (th->fin)
7702 return;
7703
7704 /* sample on all syn packets or once every atr sample count */
7705 if (!th->syn && (ring->atr_count < ring->atr_sample_rate))
7706 return;
7707
7708 /* reset sample count */
7709 ring->atr_count = 0;
7710
7711 vlan_id = htons(first->tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT);
7712
7713 /*
7714 * src and dst are inverted, think how the receiver sees them
7715 *
7716 * The input is broken into two sections, a non-compressed section
7717 * containing vm_pool, vlan_id, and flow_type. The rest of the data
7718 * is XORed together and stored in the compressed dword.
7719 */
7720 input.formatted.vlan_id = vlan_id;
7721
7722 /*
7723 * since src port and flex bytes occupy the same word XOR them together
7724 * and write the value to source port portion of compressed dword
7725 */
7726 if (first->tx_flags & (IXGBE_TX_FLAGS_SW_VLAN | IXGBE_TX_FLAGS_HW_VLAN))
7727 common.port.src ^= th->dest ^ htons(ETH_P_8021Q);
7728 else
7729 common.port.src ^= th->dest ^ first->protocol;
7730 common.port.dst ^= th->source;
7731
7732 switch (hdr.ipv4->version) {
7733 case IPVERSION:
7734 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4;
7735 common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr;
7736 break;
7737 case 6:
7738 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6;
7739 common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^
7740 hdr.ipv6->saddr.s6_addr32[1] ^
7741 hdr.ipv6->saddr.s6_addr32[2] ^
7742 hdr.ipv6->saddr.s6_addr32[3] ^
7743 hdr.ipv6->daddr.s6_addr32[0] ^
7744 hdr.ipv6->daddr.s6_addr32[1] ^
7745 hdr.ipv6->daddr.s6_addr32[2] ^
7746 hdr.ipv6->daddr.s6_addr32[3];
7747 break;
7748 default:
7749 break;
7750 }
7751
7752 if (hdr.network != skb_network_header(skb))
7753 input.formatted.flow_type |= IXGBE_ATR_L4TYPE_TUNNEL_MASK;
7754
7755 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
7756 ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw,
7757 input, common, ring->queue_index);
7758 }
7759
7760 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb,
7761 void *accel_priv, select_queue_fallback_t fallback)
7762 {
7763 struct ixgbe_fwd_adapter *fwd_adapter = accel_priv;
7764 #ifdef IXGBE_FCOE
7765 struct ixgbe_adapter *adapter;
7766 struct ixgbe_ring_feature *f;
7767 int txq;
7768 #endif
7769
7770 if (fwd_adapter)
7771 return skb->queue_mapping + fwd_adapter->tx_base_queue;
7772
7773 #ifdef IXGBE_FCOE
7774
7775 /*
7776 * only execute the code below if protocol is FCoE
7777 * or FIP and we have FCoE enabled on the adapter
7778 */
7779 switch (vlan_get_protocol(skb)) {
7780 case htons(ETH_P_FCOE):
7781 case htons(ETH_P_FIP):
7782 adapter = netdev_priv(dev);
7783
7784 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
7785 break;
7786 default:
7787 return fallback(dev, skb);
7788 }
7789
7790 f = &adapter->ring_feature[RING_F_FCOE];
7791
7792 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) :
7793 smp_processor_id();
7794
7795 while (txq >= f->indices)
7796 txq -= f->indices;
7797
7798 return txq + f->offset;
7799 #else
7800 return fallback(dev, skb);
7801 #endif
7802 }
7803
7804 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
7805 struct ixgbe_adapter *adapter,
7806 struct ixgbe_ring *tx_ring)
7807 {
7808 struct ixgbe_tx_buffer *first;
7809 int tso;
7810 u32 tx_flags = 0;
7811 unsigned short f;
7812 u16 count = TXD_USE_COUNT(skb_headlen(skb));
7813 __be16 protocol = skb->protocol;
7814 u8 hdr_len = 0;
7815
7816 /*
7817 * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
7818 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
7819 * + 2 desc gap to keep tail from touching head,
7820 * + 1 desc for context descriptor,
7821 * otherwise try next time
7822 */
7823 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
7824 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
7825
7826 if (ixgbe_maybe_stop_tx(tx_ring, count + 3)) {
7827 tx_ring->tx_stats.tx_busy++;
7828 return NETDEV_TX_BUSY;
7829 }
7830
7831 /* record the location of the first descriptor for this packet */
7832 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
7833 first->skb = skb;
7834 first->bytecount = skb->len;
7835 first->gso_segs = 1;
7836
7837 /* if we have a HW VLAN tag being added default to the HW one */
7838 if (skb_vlan_tag_present(skb)) {
7839 tx_flags |= skb_vlan_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT;
7840 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
7841 /* else if it is a SW VLAN check the next protocol and store the tag */
7842 } else if (protocol == htons(ETH_P_8021Q)) {
7843 struct vlan_hdr *vhdr, _vhdr;
7844 vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(_vhdr), &_vhdr);
7845 if (!vhdr)
7846 goto out_drop;
7847
7848 tx_flags |= ntohs(vhdr->h_vlan_TCI) <<
7849 IXGBE_TX_FLAGS_VLAN_SHIFT;
7850 tx_flags |= IXGBE_TX_FLAGS_SW_VLAN;
7851 }
7852 protocol = vlan_get_protocol(skb);
7853
7854 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
7855 adapter->ptp_clock &&
7856 !test_and_set_bit_lock(__IXGBE_PTP_TX_IN_PROGRESS,
7857 &adapter->state)) {
7858 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
7859 tx_flags |= IXGBE_TX_FLAGS_TSTAMP;
7860
7861 /* schedule check for Tx timestamp */
7862 adapter->ptp_tx_skb = skb_get(skb);
7863 adapter->ptp_tx_start = jiffies;
7864 schedule_work(&adapter->ptp_tx_work);
7865 }
7866
7867 skb_tx_timestamp(skb);
7868
7869 #ifdef CONFIG_PCI_IOV
7870 /*
7871 * Use the l2switch_enable flag - would be false if the DMA
7872 * Tx switch had been disabled.
7873 */
7874 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7875 tx_flags |= IXGBE_TX_FLAGS_CC;
7876
7877 #endif
7878 /* DCB maps skb priorities 0-7 onto 3 bit PCP of VLAN tag. */
7879 if ((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
7880 ((tx_flags & (IXGBE_TX_FLAGS_HW_VLAN | IXGBE_TX_FLAGS_SW_VLAN)) ||
7881 (skb->priority != TC_PRIO_CONTROL))) {
7882 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
7883 tx_flags |= (skb->priority & 0x7) <<
7884 IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT;
7885 if (tx_flags & IXGBE_TX_FLAGS_SW_VLAN) {
7886 struct vlan_ethhdr *vhdr;
7887
7888 if (skb_cow_head(skb, 0))
7889 goto out_drop;
7890 vhdr = (struct vlan_ethhdr *)skb->data;
7891 vhdr->h_vlan_TCI = htons(tx_flags >>
7892 IXGBE_TX_FLAGS_VLAN_SHIFT);
7893 } else {
7894 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
7895 }
7896 }
7897
7898 /* record initial flags and protocol */
7899 first->tx_flags = tx_flags;
7900 first->protocol = protocol;
7901
7902 #ifdef IXGBE_FCOE
7903 /* setup tx offload for FCoE */
7904 if ((protocol == htons(ETH_P_FCOE)) &&
7905 (tx_ring->netdev->features & (NETIF_F_FSO | NETIF_F_FCOE_CRC))) {
7906 tso = ixgbe_fso(tx_ring, first, &hdr_len);
7907 if (tso < 0)
7908 goto out_drop;
7909
7910 goto xmit_fcoe;
7911 }
7912
7913 #endif /* IXGBE_FCOE */
7914 tso = ixgbe_tso(tx_ring, first, &hdr_len);
7915 if (tso < 0)
7916 goto out_drop;
7917 else if (!tso)
7918 ixgbe_tx_csum(tx_ring, first);
7919
7920 /* add the ATR filter if ATR is on */
7921 if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state))
7922 ixgbe_atr(tx_ring, first);
7923
7924 #ifdef IXGBE_FCOE
7925 xmit_fcoe:
7926 #endif /* IXGBE_FCOE */
7927 ixgbe_tx_map(tx_ring, first, hdr_len);
7928
7929 return NETDEV_TX_OK;
7930
7931 out_drop:
7932 dev_kfree_skb_any(first->skb);
7933 first->skb = NULL;
7934
7935 return NETDEV_TX_OK;
7936 }
7937
7938 static netdev_tx_t __ixgbe_xmit_frame(struct sk_buff *skb,
7939 struct net_device *netdev,
7940 struct ixgbe_ring *ring)
7941 {
7942 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7943 struct ixgbe_ring *tx_ring;
7944
7945 /*
7946 * The minimum packet size for olinfo paylen is 17 so pad the skb
7947 * in order to meet this minimum size requirement.
7948 */
7949 if (skb_put_padto(skb, 17))
7950 return NETDEV_TX_OK;
7951
7952 tx_ring = ring ? ring : adapter->tx_ring[skb->queue_mapping];
7953
7954 return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
7955 }
7956
7957 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
7958 struct net_device *netdev)
7959 {
7960 return __ixgbe_xmit_frame(skb, netdev, NULL);
7961 }
7962
7963 /**
7964 * ixgbe_set_mac - Change the Ethernet Address of the NIC
7965 * @netdev: network interface device structure
7966 * @p: pointer to an address structure
7967 *
7968 * Returns 0 on success, negative on failure
7969 **/
7970 static int ixgbe_set_mac(struct net_device *netdev, void *p)
7971 {
7972 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7973 struct ixgbe_hw *hw = &adapter->hw;
7974 struct sockaddr *addr = p;
7975
7976 if (!is_valid_ether_addr(addr->sa_data))
7977 return -EADDRNOTAVAIL;
7978
7979 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
7980 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
7981
7982 ixgbe_mac_set_default_filter(adapter);
7983
7984 return 0;
7985 }
7986
7987 static int
7988 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
7989 {
7990 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7991 struct ixgbe_hw *hw = &adapter->hw;
7992 u16 value;
7993 int rc;
7994
7995 if (prtad != hw->phy.mdio.prtad)
7996 return -EINVAL;
7997 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
7998 if (!rc)
7999 rc = value;
8000 return rc;
8001 }
8002
8003 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
8004 u16 addr, u16 value)
8005 {
8006 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8007 struct ixgbe_hw *hw = &adapter->hw;
8008
8009 if (prtad != hw->phy.mdio.prtad)
8010 return -EINVAL;
8011 return hw->phy.ops.write_reg(hw, addr, devad, value);
8012 }
8013
8014 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
8015 {
8016 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8017
8018 switch (cmd) {
8019 case SIOCSHWTSTAMP:
8020 return ixgbe_ptp_set_ts_config(adapter, req);
8021 case SIOCGHWTSTAMP:
8022 return ixgbe_ptp_get_ts_config(adapter, req);
8023 default:
8024 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
8025 }
8026 }
8027
8028 /**
8029 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
8030 * netdev->dev_addrs
8031 * @netdev: network interface device structure
8032 *
8033 * Returns non-zero on failure
8034 **/
8035 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
8036 {
8037 int err = 0;
8038 struct ixgbe_adapter *adapter = netdev_priv(dev);
8039 struct ixgbe_hw *hw = &adapter->hw;
8040
8041 if (is_valid_ether_addr(hw->mac.san_addr)) {
8042 rtnl_lock();
8043 err = dev_addr_add(dev, hw->mac.san_addr, NETDEV_HW_ADDR_T_SAN);
8044 rtnl_unlock();
8045
8046 /* update SAN MAC vmdq pool selection */
8047 hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));
8048 }
8049 return err;
8050 }
8051
8052 /**
8053 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
8054 * netdev->dev_addrs
8055 * @netdev: network interface device structure
8056 *
8057 * Returns non-zero on failure
8058 **/
8059 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
8060 {
8061 int err = 0;
8062 struct ixgbe_adapter *adapter = netdev_priv(dev);
8063 struct ixgbe_mac_info *mac = &adapter->hw.mac;
8064
8065 if (is_valid_ether_addr(mac->san_addr)) {
8066 rtnl_lock();
8067 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
8068 rtnl_unlock();
8069 }
8070 return err;
8071 }
8072
8073 #ifdef CONFIG_NET_POLL_CONTROLLER
8074 /*
8075 * Polling 'interrupt' - used by things like netconsole to send skbs
8076 * without having to re-enable interrupts. It's not called while
8077 * the interrupt routine is executing.
8078 */
8079 static void ixgbe_netpoll(struct net_device *netdev)
8080 {
8081 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8082 int i;
8083
8084 /* if interface is down do nothing */
8085 if (test_bit(__IXGBE_DOWN, &adapter->state))
8086 return;
8087
8088 /* loop through and schedule all active queues */
8089 for (i = 0; i < adapter->num_q_vectors; i++)
8090 ixgbe_msix_clean_rings(0, adapter->q_vector[i]);
8091 }
8092
8093 #endif
8094 static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
8095 struct rtnl_link_stats64 *stats)
8096 {
8097 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8098 int i;
8099
8100 rcu_read_lock();
8101 for (i = 0; i < adapter->num_rx_queues; i++) {
8102 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]);
8103 u64 bytes, packets;
8104 unsigned int start;
8105
8106 if (ring) {
8107 do {
8108 start = u64_stats_fetch_begin_irq(&ring->syncp);
8109 packets = ring->stats.packets;
8110 bytes = ring->stats.bytes;
8111 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
8112 stats->rx_packets += packets;
8113 stats->rx_bytes += bytes;
8114 }
8115 }
8116
8117 for (i = 0; i < adapter->num_tx_queues; i++) {
8118 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->tx_ring[i]);
8119 u64 bytes, packets;
8120 unsigned int start;
8121
8122 if (ring) {
8123 do {
8124 start = u64_stats_fetch_begin_irq(&ring->syncp);
8125 packets = ring->stats.packets;
8126 bytes = ring->stats.bytes;
8127 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
8128 stats->tx_packets += packets;
8129 stats->tx_bytes += bytes;
8130 }
8131 }
8132 rcu_read_unlock();
8133 /* following stats updated by ixgbe_watchdog_task() */
8134 stats->multicast = netdev->stats.multicast;
8135 stats->rx_errors = netdev->stats.rx_errors;
8136 stats->rx_length_errors = netdev->stats.rx_length_errors;
8137 stats->rx_crc_errors = netdev->stats.rx_crc_errors;
8138 stats->rx_missed_errors = netdev->stats.rx_missed_errors;
8139 return stats;
8140 }
8141
8142 #ifdef CONFIG_IXGBE_DCB
8143 /**
8144 * ixgbe_validate_rtr - verify 802.1Qp to Rx packet buffer mapping is valid.
8145 * @adapter: pointer to ixgbe_adapter
8146 * @tc: number of traffic classes currently enabled
8147 *
8148 * Configure a valid 802.1Qp to Rx packet buffer mapping ie confirm
8149 * 802.1Q priority maps to a packet buffer that exists.
8150 */
8151 static void ixgbe_validate_rtr(struct ixgbe_adapter *adapter, u8 tc)
8152 {
8153 struct ixgbe_hw *hw = &adapter->hw;
8154 u32 reg, rsave;
8155 int i;
8156
8157 /* 82598 have a static priority to TC mapping that can not
8158 * be changed so no validation is needed.
8159 */
8160 if (hw->mac.type == ixgbe_mac_82598EB)
8161 return;
8162
8163 reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC);
8164 rsave = reg;
8165
8166 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
8167 u8 up2tc = reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT);
8168
8169 /* If up2tc is out of bounds default to zero */
8170 if (up2tc > tc)
8171 reg &= ~(0x7 << IXGBE_RTRUP2TC_UP_SHIFT);
8172 }
8173
8174 if (reg != rsave)
8175 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
8176
8177 return;
8178 }
8179
8180 /**
8181 * ixgbe_set_prio_tc_map - Configure netdev prio tc map
8182 * @adapter: Pointer to adapter struct
8183 *
8184 * Populate the netdev user priority to tc map
8185 */
8186 static void ixgbe_set_prio_tc_map(struct ixgbe_adapter *adapter)
8187 {
8188 struct net_device *dev = adapter->netdev;
8189 struct ixgbe_dcb_config *dcb_cfg = &adapter->dcb_cfg;
8190 struct ieee_ets *ets = adapter->ixgbe_ieee_ets;
8191 u8 prio;
8192
8193 for (prio = 0; prio < MAX_USER_PRIORITY; prio++) {
8194 u8 tc = 0;
8195
8196 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE)
8197 tc = ixgbe_dcb_get_tc_from_up(dcb_cfg, 0, prio);
8198 else if (ets)
8199 tc = ets->prio_tc[prio];
8200
8201 netdev_set_prio_tc_map(dev, prio, tc);
8202 }
8203 }
8204
8205 #endif /* CONFIG_IXGBE_DCB */
8206 /**
8207 * ixgbe_setup_tc - configure net_device for multiple traffic classes
8208 *
8209 * @netdev: net device to configure
8210 * @tc: number of traffic classes to enable
8211 */
8212 int ixgbe_setup_tc(struct net_device *dev, u8 tc)
8213 {
8214 struct ixgbe_adapter *adapter = netdev_priv(dev);
8215 struct ixgbe_hw *hw = &adapter->hw;
8216 bool pools;
8217
8218 /* Hardware supports up to 8 traffic classes */
8219 if (tc > adapter->dcb_cfg.num_tcs.pg_tcs)
8220 return -EINVAL;
8221
8222 if (hw->mac.type == ixgbe_mac_82598EB && tc && tc < MAX_TRAFFIC_CLASS)
8223 return -EINVAL;
8224
8225 pools = (find_first_zero_bit(&adapter->fwd_bitmask, 32) > 1);
8226 if (tc && pools && adapter->num_rx_pools > IXGBE_MAX_DCBMACVLANS)
8227 return -EBUSY;
8228
8229 /* Hardware has to reinitialize queues and interrupts to
8230 * match packet buffer alignment. Unfortunately, the
8231 * hardware is not flexible enough to do this dynamically.
8232 */
8233 if (netif_running(dev))
8234 ixgbe_close(dev);
8235 else
8236 ixgbe_reset(adapter);
8237
8238 ixgbe_clear_interrupt_scheme(adapter);
8239
8240 #ifdef CONFIG_IXGBE_DCB
8241 if (tc) {
8242 netdev_set_num_tc(dev, tc);
8243 ixgbe_set_prio_tc_map(adapter);
8244
8245 adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
8246
8247 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
8248 adapter->last_lfc_mode = adapter->hw.fc.requested_mode;
8249 adapter->hw.fc.requested_mode = ixgbe_fc_none;
8250 }
8251 } else {
8252 netdev_reset_tc(dev);
8253
8254 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
8255 adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
8256
8257 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
8258
8259 adapter->temp_dcb_cfg.pfc_mode_enable = false;
8260 adapter->dcb_cfg.pfc_mode_enable = false;
8261 }
8262
8263 ixgbe_validate_rtr(adapter, tc);
8264
8265 #endif /* CONFIG_IXGBE_DCB */
8266 ixgbe_init_interrupt_scheme(adapter);
8267
8268 if (netif_running(dev))
8269 return ixgbe_open(dev);
8270
8271 return 0;
8272 }
8273
8274 static int ixgbe_delete_clsu32(struct ixgbe_adapter *adapter,
8275 struct tc_cls_u32_offload *cls)
8276 {
8277 u32 uhtid = TC_U32_USERHTID(cls->knode.handle);
8278 u32 loc;
8279 int err;
8280
8281 if ((uhtid != 0x800) && (uhtid >= IXGBE_MAX_LINK_HANDLE))
8282 return -EINVAL;
8283
8284 loc = cls->knode.handle & 0xfffff;
8285
8286 spin_lock(&adapter->fdir_perfect_lock);
8287 err = ixgbe_update_ethtool_fdir_entry(adapter, NULL, loc);
8288 spin_unlock(&adapter->fdir_perfect_lock);
8289 return err;
8290 }
8291
8292 static int ixgbe_configure_clsu32_add_hnode(struct ixgbe_adapter *adapter,
8293 __be16 protocol,
8294 struct tc_cls_u32_offload *cls)
8295 {
8296 u32 uhtid = TC_U32_USERHTID(cls->hnode.handle);
8297
8298 if (uhtid >= IXGBE_MAX_LINK_HANDLE)
8299 return -EINVAL;
8300
8301 /* This ixgbe devices do not support hash tables at the moment
8302 * so abort when given hash tables.
8303 */
8304 if (cls->hnode.divisor > 0)
8305 return -EINVAL;
8306
8307 set_bit(uhtid - 1, &adapter->tables);
8308 return 0;
8309 }
8310
8311 static int ixgbe_configure_clsu32_del_hnode(struct ixgbe_adapter *adapter,
8312 struct tc_cls_u32_offload *cls)
8313 {
8314 u32 uhtid = TC_U32_USERHTID(cls->hnode.handle);
8315
8316 if (uhtid >= IXGBE_MAX_LINK_HANDLE)
8317 return -EINVAL;
8318
8319 clear_bit(uhtid - 1, &adapter->tables);
8320 return 0;
8321 }
8322
8323 #ifdef CONFIG_NET_CLS_ACT
8324 static int handle_redirect_action(struct ixgbe_adapter *adapter, int ifindex,
8325 u8 *queue, u64 *action)
8326 {
8327 unsigned int num_vfs = adapter->num_vfs, vf;
8328 struct net_device *upper;
8329 struct list_head *iter;
8330
8331 /* redirect to a SRIOV VF */
8332 for (vf = 0; vf < num_vfs; ++vf) {
8333 upper = pci_get_drvdata(adapter->vfinfo[vf].vfdev);
8334 if (upper->ifindex == ifindex) {
8335 if (adapter->num_rx_pools > 1)
8336 *queue = vf * 2;
8337 else
8338 *queue = vf * adapter->num_rx_queues_per_pool;
8339
8340 *action = vf + 1;
8341 *action <<= ETHTOOL_RX_FLOW_SPEC_RING_VF_OFF;
8342 return 0;
8343 }
8344 }
8345
8346 /* redirect to a offloaded macvlan netdev */
8347 netdev_for_each_all_upper_dev_rcu(adapter->netdev, upper, iter) {
8348 if (netif_is_macvlan(upper)) {
8349 struct macvlan_dev *dfwd = netdev_priv(upper);
8350 struct ixgbe_fwd_adapter *vadapter = dfwd->fwd_priv;
8351
8352 if (vadapter && vadapter->netdev->ifindex == ifindex) {
8353 *queue = adapter->rx_ring[vadapter->rx_base_queue]->reg_idx;
8354 *action = *queue;
8355 return 0;
8356 }
8357 }
8358 }
8359
8360 return -EINVAL;
8361 }
8362
8363 static int parse_tc_actions(struct ixgbe_adapter *adapter,
8364 struct tcf_exts *exts, u64 *action, u8 *queue)
8365 {
8366 const struct tc_action *a;
8367 int err;
8368
8369 if (tc_no_actions(exts))
8370 return -EINVAL;
8371
8372 tc_for_each_action(a, exts) {
8373
8374 /* Drop action */
8375 if (is_tcf_gact_shot(a)) {
8376 *action = IXGBE_FDIR_DROP_QUEUE;
8377 *queue = IXGBE_FDIR_DROP_QUEUE;
8378 return 0;
8379 }
8380
8381 /* Redirect to a VF or a offloaded macvlan */
8382 if (is_tcf_mirred_redirect(a)) {
8383 int ifindex = tcf_mirred_ifindex(a);
8384
8385 err = handle_redirect_action(adapter, ifindex, queue,
8386 action);
8387 if (err == 0)
8388 return err;
8389 }
8390 }
8391
8392 return -EINVAL;
8393 }
8394 #else
8395 static int parse_tc_actions(struct ixgbe_adapter *adapter,
8396 struct tcf_exts *exts, u64 *action, u8 *queue)
8397 {
8398 return -EINVAL;
8399 }
8400 #endif /* CONFIG_NET_CLS_ACT */
8401
8402 static int ixgbe_configure_clsu32(struct ixgbe_adapter *adapter,
8403 __be16 protocol,
8404 struct tc_cls_u32_offload *cls)
8405 {
8406 u32 loc = cls->knode.handle & 0xfffff;
8407 struct ixgbe_hw *hw = &adapter->hw;
8408 struct ixgbe_mat_field *field_ptr;
8409 struct ixgbe_fdir_filter *input;
8410 union ixgbe_atr_input mask;
8411 int i, err = 0;
8412 u8 queue;
8413 u32 uhtid, link_uhtid;
8414
8415 memset(&mask, 0, sizeof(union ixgbe_atr_input));
8416 uhtid = TC_U32_USERHTID(cls->knode.handle);
8417 link_uhtid = TC_U32_USERHTID(cls->knode.link_handle);
8418
8419 /* At the moment cls_u32 jumps to network layer and skips past
8420 * L2 headers. The canonical method to match L2 frames is to use
8421 * negative values. However this is error prone at best but really
8422 * just broken because there is no way to "know" what sort of hdr
8423 * is in front of the network layer. Fix cls_u32 to support L2
8424 * headers when needed.
8425 */
8426 if (protocol != htons(ETH_P_IP))
8427 return -EINVAL;
8428
8429 if (link_uhtid) {
8430 struct ixgbe_nexthdr *nexthdr = ixgbe_ipv4_jumps;
8431
8432 if (link_uhtid >= IXGBE_MAX_LINK_HANDLE)
8433 return -EINVAL;
8434
8435 if (!test_bit(link_uhtid - 1, &adapter->tables))
8436 return -EINVAL;
8437
8438 for (i = 0; nexthdr[i].jump; i++) {
8439 if (nexthdr[i].o != cls->knode.sel->offoff ||
8440 nexthdr[i].s != cls->knode.sel->offshift ||
8441 nexthdr[i].m != cls->knode.sel->offmask ||
8442 /* do not support multiple key jumps its just mad */
8443 cls->knode.sel->nkeys > 1)
8444 return -EINVAL;
8445
8446 if (nexthdr[i].off == cls->knode.sel->keys[0].off &&
8447 nexthdr[i].val == cls->knode.sel->keys[0].val &&
8448 nexthdr[i].mask == cls->knode.sel->keys[0].mask) {
8449 adapter->jump_tables[link_uhtid] =
8450 nexthdr[i].jump;
8451 break;
8452 }
8453 }
8454 return 0;
8455 }
8456
8457 if (loc >= ((1024 << adapter->fdir_pballoc) - 2)) {
8458 e_err(drv, "Location out of range\n");
8459 return -EINVAL;
8460 }
8461
8462 /* cls u32 is a graph starting at root node 0x800. The driver tracks
8463 * links and also the fields used to advance the parser across each
8464 * link (e.g. nexthdr/eat parameters from 'tc'). This way we can map
8465 * the u32 graph onto the hardware parse graph denoted in ixgbe_model.h
8466 * To add support for new nodes update ixgbe_model.h parse structures
8467 * this function _should_ be generic try not to hardcode values here.
8468 */
8469 if (uhtid == 0x800) {
8470 field_ptr = adapter->jump_tables[0];
8471 } else {
8472 if (uhtid >= IXGBE_MAX_LINK_HANDLE)
8473 return -EINVAL;
8474
8475 field_ptr = adapter->jump_tables[uhtid];
8476 }
8477
8478 if (!field_ptr)
8479 return -EINVAL;
8480
8481 input = kzalloc(sizeof(*input), GFP_KERNEL);
8482 if (!input)
8483 return -ENOMEM;
8484
8485 for (i = 0; i < cls->knode.sel->nkeys; i++) {
8486 int off = cls->knode.sel->keys[i].off;
8487 __be32 val = cls->knode.sel->keys[i].val;
8488 __be32 m = cls->knode.sel->keys[i].mask;
8489 bool found_entry = false;
8490 int j;
8491
8492 for (j = 0; field_ptr[j].val; j++) {
8493 if (field_ptr[j].off == off) {
8494 field_ptr[j].val(input, &mask, val, m);
8495 input->filter.formatted.flow_type |=
8496 field_ptr[j].type;
8497 found_entry = true;
8498 break;
8499 }
8500 }
8501
8502 if (!found_entry)
8503 goto err_out;
8504 }
8505
8506 mask.formatted.flow_type = IXGBE_ATR_L4TYPE_IPV6_MASK |
8507 IXGBE_ATR_L4TYPE_MASK;
8508
8509 if (input->filter.formatted.flow_type == IXGBE_ATR_FLOW_TYPE_IPV4)
8510 mask.formatted.flow_type &= IXGBE_ATR_L4TYPE_IPV6_MASK;
8511
8512 err = parse_tc_actions(adapter, cls->knode.exts, &input->action,
8513 &queue);
8514 if (err < 0)
8515 goto err_out;
8516
8517 input->sw_idx = loc;
8518
8519 spin_lock(&adapter->fdir_perfect_lock);
8520
8521 if (hlist_empty(&adapter->fdir_filter_list)) {
8522 memcpy(&adapter->fdir_mask, &mask, sizeof(mask));
8523 err = ixgbe_fdir_set_input_mask_82599(hw, &mask);
8524 if (err)
8525 goto err_out_w_lock;
8526 } else if (memcmp(&adapter->fdir_mask, &mask, sizeof(mask))) {
8527 err = -EINVAL;
8528 goto err_out_w_lock;
8529 }
8530
8531 ixgbe_atr_compute_perfect_hash_82599(&input->filter, &mask);
8532 err = ixgbe_fdir_write_perfect_filter_82599(hw, &input->filter,
8533 input->sw_idx, queue);
8534 if (!err)
8535 ixgbe_update_ethtool_fdir_entry(adapter, input, input->sw_idx);
8536 spin_unlock(&adapter->fdir_perfect_lock);
8537
8538 return err;
8539 err_out_w_lock:
8540 spin_unlock(&adapter->fdir_perfect_lock);
8541 err_out:
8542 kfree(input);
8543 return -EINVAL;
8544 }
8545
8546 static int __ixgbe_setup_tc(struct net_device *dev, u32 handle, __be16 proto,
8547 struct tc_to_netdev *tc)
8548 {
8549 struct ixgbe_adapter *adapter = netdev_priv(dev);
8550
8551 if (TC_H_MAJ(handle) == TC_H_MAJ(TC_H_INGRESS) &&
8552 tc->type == TC_SETUP_CLSU32) {
8553 switch (tc->cls_u32->command) {
8554 case TC_CLSU32_NEW_KNODE:
8555 case TC_CLSU32_REPLACE_KNODE:
8556 return ixgbe_configure_clsu32(adapter,
8557 proto, tc->cls_u32);
8558 case TC_CLSU32_DELETE_KNODE:
8559 return ixgbe_delete_clsu32(adapter, tc->cls_u32);
8560 case TC_CLSU32_NEW_HNODE:
8561 case TC_CLSU32_REPLACE_HNODE:
8562 return ixgbe_configure_clsu32_add_hnode(adapter, proto,
8563 tc->cls_u32);
8564 case TC_CLSU32_DELETE_HNODE:
8565 return ixgbe_configure_clsu32_del_hnode(adapter,
8566 tc->cls_u32);
8567 default:
8568 return -EINVAL;
8569 }
8570 }
8571
8572 if (tc->type != TC_SETUP_MQPRIO)
8573 return -EINVAL;
8574
8575 return ixgbe_setup_tc(dev, tc->tc);
8576 }
8577
8578 #ifdef CONFIG_PCI_IOV
8579 void ixgbe_sriov_reinit(struct ixgbe_adapter *adapter)
8580 {
8581 struct net_device *netdev = adapter->netdev;
8582
8583 rtnl_lock();
8584 ixgbe_setup_tc(netdev, netdev_get_num_tc(netdev));
8585 rtnl_unlock();
8586 }
8587
8588 #endif
8589 void ixgbe_do_reset(struct net_device *netdev)
8590 {
8591 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8592
8593 if (netif_running(netdev))
8594 ixgbe_reinit_locked(adapter);
8595 else
8596 ixgbe_reset(adapter);
8597 }
8598
8599 static netdev_features_t ixgbe_fix_features(struct net_device *netdev,
8600 netdev_features_t features)
8601 {
8602 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8603
8604 /* If Rx checksum is disabled, then RSC/LRO should also be disabled */
8605 if (!(features & NETIF_F_RXCSUM))
8606 features &= ~NETIF_F_LRO;
8607
8608 /* Turn off LRO if not RSC capable */
8609 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE))
8610 features &= ~NETIF_F_LRO;
8611
8612 return features;
8613 }
8614
8615 static int ixgbe_set_features(struct net_device *netdev,
8616 netdev_features_t features)
8617 {
8618 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8619 netdev_features_t changed = netdev->features ^ features;
8620 bool need_reset = false;
8621
8622 /* Make sure RSC matches LRO, reset if change */
8623 if (!(features & NETIF_F_LRO)) {
8624 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
8625 need_reset = true;
8626 adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED;
8627 } else if ((adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) &&
8628 !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)) {
8629 if (adapter->rx_itr_setting == 1 ||
8630 adapter->rx_itr_setting > IXGBE_MIN_RSC_ITR) {
8631 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
8632 need_reset = true;
8633 } else if ((changed ^ features) & NETIF_F_LRO) {
8634 e_info(probe, "rx-usecs set too low, "
8635 "disabling RSC\n");
8636 }
8637 }
8638
8639 /*
8640 * Check if Flow Director n-tuple support or hw_tc support was
8641 * enabled or disabled. If the state changed, we need to reset.
8642 */
8643 if ((features & NETIF_F_NTUPLE) || (features & NETIF_F_HW_TC)) {
8644 /* turn off ATR, enable perfect filters and reset */
8645 if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
8646 need_reset = true;
8647
8648 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
8649 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
8650 } else {
8651 /* turn off perfect filters, enable ATR and reset */
8652 if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
8653 need_reset = true;
8654
8655 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
8656
8657 /* We cannot enable ATR if SR-IOV is enabled */
8658 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED ||
8659 /* We cannot enable ATR if we have 2 or more tcs */
8660 (netdev_get_num_tc(netdev) > 1) ||
8661 /* We cannot enable ATR if RSS is disabled */
8662 (adapter->ring_feature[RING_F_RSS].limit <= 1) ||
8663 /* A sample rate of 0 indicates ATR disabled */
8664 (!adapter->atr_sample_rate))
8665 ; /* do nothing not supported */
8666 else /* otherwise supported and set the flag */
8667 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
8668 }
8669
8670 if (changed & NETIF_F_RXALL)
8671 need_reset = true;
8672
8673 netdev->features = features;
8674
8675 #ifdef CONFIG_IXGBE_VXLAN
8676 if ((adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE)) {
8677 if (features & NETIF_F_RXCSUM)
8678 adapter->flags2 |= IXGBE_FLAG2_VXLAN_REREG_NEEDED;
8679 else
8680 ixgbe_clear_vxlan_port(adapter);
8681 }
8682 #endif /* CONFIG_IXGBE_VXLAN */
8683
8684 if (need_reset)
8685 ixgbe_do_reset(netdev);
8686 else if (changed & (NETIF_F_HW_VLAN_CTAG_RX |
8687 NETIF_F_HW_VLAN_CTAG_FILTER))
8688 ixgbe_set_rx_mode(netdev);
8689
8690 return 0;
8691 }
8692
8693 #ifdef CONFIG_IXGBE_VXLAN
8694 /**
8695 * ixgbe_add_vxlan_port - Get notifications about VXLAN ports that come up
8696 * @dev: The port's netdev
8697 * @sa_family: Socket Family that VXLAN is notifiying us about
8698 * @port: New UDP port number that VXLAN started listening to
8699 **/
8700 static void ixgbe_add_vxlan_port(struct net_device *dev, sa_family_t sa_family,
8701 __be16 port)
8702 {
8703 struct ixgbe_adapter *adapter = netdev_priv(dev);
8704 struct ixgbe_hw *hw = &adapter->hw;
8705
8706 if (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE))
8707 return;
8708
8709 if (sa_family == AF_INET6)
8710 return;
8711
8712 if (adapter->vxlan_port == port)
8713 return;
8714
8715 if (adapter->vxlan_port) {
8716 netdev_info(dev,
8717 "Hit Max num of VXLAN ports, not adding port %d\n",
8718 ntohs(port));
8719 return;
8720 }
8721
8722 adapter->vxlan_port = port;
8723 IXGBE_WRITE_REG(hw, IXGBE_VXLANCTRL, ntohs(port));
8724 }
8725
8726 /**
8727 * ixgbe_del_vxlan_port - Get notifications about VXLAN ports that go away
8728 * @dev: The port's netdev
8729 * @sa_family: Socket Family that VXLAN is notifying us about
8730 * @port: UDP port number that VXLAN stopped listening to
8731 **/
8732 static void ixgbe_del_vxlan_port(struct net_device *dev, sa_family_t sa_family,
8733 __be16 port)
8734 {
8735 struct ixgbe_adapter *adapter = netdev_priv(dev);
8736
8737 if (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE))
8738 return;
8739
8740 if (sa_family == AF_INET6)
8741 return;
8742
8743 if (adapter->vxlan_port != port) {
8744 netdev_info(dev, "Port %d was not found, not deleting\n",
8745 ntohs(port));
8746 return;
8747 }
8748
8749 ixgbe_clear_vxlan_port(adapter);
8750 adapter->flags2 |= IXGBE_FLAG2_VXLAN_REREG_NEEDED;
8751 }
8752 #endif /* CONFIG_IXGBE_VXLAN */
8753
8754 static int ixgbe_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
8755 struct net_device *dev,
8756 const unsigned char *addr, u16 vid,
8757 u16 flags)
8758 {
8759 /* guarantee we can provide a unique filter for the unicast address */
8760 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) {
8761 struct ixgbe_adapter *adapter = netdev_priv(dev);
8762 u16 pool = VMDQ_P(0);
8763
8764 if (netdev_uc_count(dev) >= ixgbe_available_rars(adapter, pool))
8765 return -ENOMEM;
8766 }
8767
8768 return ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, flags);
8769 }
8770
8771 /**
8772 * ixgbe_configure_bridge_mode - set various bridge modes
8773 * @adapter - the private structure
8774 * @mode - requested bridge mode
8775 *
8776 * Configure some settings require for various bridge modes.
8777 **/
8778 static int ixgbe_configure_bridge_mode(struct ixgbe_adapter *adapter,
8779 __u16 mode)
8780 {
8781 struct ixgbe_hw *hw = &adapter->hw;
8782 unsigned int p, num_pools;
8783 u32 vmdctl;
8784
8785 switch (mode) {
8786 case BRIDGE_MODE_VEPA:
8787 /* disable Tx loopback, rely on switch hairpin mode */
8788 IXGBE_WRITE_REG(&adapter->hw, IXGBE_PFDTXGSWC, 0);
8789
8790 /* must enable Rx switching replication to allow multicast
8791 * packet reception on all VFs, and to enable source address
8792 * pruning.
8793 */
8794 vmdctl = IXGBE_READ_REG(hw, IXGBE_VMD_CTL);
8795 vmdctl |= IXGBE_VT_CTL_REPLEN;
8796 IXGBE_WRITE_REG(hw, IXGBE_VMD_CTL, vmdctl);
8797
8798 /* enable Rx source address pruning. Note, this requires
8799 * replication to be enabled or else it does nothing.
8800 */
8801 num_pools = adapter->num_vfs + adapter->num_rx_pools;
8802 for (p = 0; p < num_pools; p++) {
8803 if (hw->mac.ops.set_source_address_pruning)
8804 hw->mac.ops.set_source_address_pruning(hw,
8805 true,
8806 p);
8807 }
8808 break;
8809 case BRIDGE_MODE_VEB:
8810 /* enable Tx loopback for internal VF/PF communication */
8811 IXGBE_WRITE_REG(&adapter->hw, IXGBE_PFDTXGSWC,
8812 IXGBE_PFDTXGSWC_VT_LBEN);
8813
8814 /* disable Rx switching replication unless we have SR-IOV
8815 * virtual functions
8816 */
8817 vmdctl = IXGBE_READ_REG(hw, IXGBE_VMD_CTL);
8818 if (!adapter->num_vfs)
8819 vmdctl &= ~IXGBE_VT_CTL_REPLEN;
8820 IXGBE_WRITE_REG(hw, IXGBE_VMD_CTL, vmdctl);
8821
8822 /* disable Rx source address pruning, since we don't expect to
8823 * be receiving external loopback of our transmitted frames.
8824 */
8825 num_pools = adapter->num_vfs + adapter->num_rx_pools;
8826 for (p = 0; p < num_pools; p++) {
8827 if (hw->mac.ops.set_source_address_pruning)
8828 hw->mac.ops.set_source_address_pruning(hw,
8829 false,
8830 p);
8831 }
8832 break;
8833 default:
8834 return -EINVAL;
8835 }
8836
8837 adapter->bridge_mode = mode;
8838
8839 e_info(drv, "enabling bridge mode: %s\n",
8840 mode == BRIDGE_MODE_VEPA ? "VEPA" : "VEB");
8841
8842 return 0;
8843 }
8844
8845 static int ixgbe_ndo_bridge_setlink(struct net_device *dev,
8846 struct nlmsghdr *nlh, u16 flags)
8847 {
8848 struct ixgbe_adapter *adapter = netdev_priv(dev);
8849 struct nlattr *attr, *br_spec;
8850 int rem;
8851
8852 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
8853 return -EOPNOTSUPP;
8854
8855 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
8856 if (!br_spec)
8857 return -EINVAL;
8858
8859 nla_for_each_nested(attr, br_spec, rem) {
8860 int status;
8861 __u16 mode;
8862
8863 if (nla_type(attr) != IFLA_BRIDGE_MODE)
8864 continue;
8865
8866 if (nla_len(attr) < sizeof(mode))
8867 return -EINVAL;
8868
8869 mode = nla_get_u16(attr);
8870 status = ixgbe_configure_bridge_mode(adapter, mode);
8871 if (status)
8872 return status;
8873
8874 break;
8875 }
8876
8877 return 0;
8878 }
8879
8880 static int ixgbe_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
8881 struct net_device *dev,
8882 u32 filter_mask, int nlflags)
8883 {
8884 struct ixgbe_adapter *adapter = netdev_priv(dev);
8885
8886 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
8887 return 0;
8888
8889 return ndo_dflt_bridge_getlink(skb, pid, seq, dev,
8890 adapter->bridge_mode, 0, 0, nlflags,
8891 filter_mask, NULL);
8892 }
8893
8894 static void *ixgbe_fwd_add(struct net_device *pdev, struct net_device *vdev)
8895 {
8896 struct ixgbe_fwd_adapter *fwd_adapter = NULL;
8897 struct ixgbe_adapter *adapter = netdev_priv(pdev);
8898 int used_pools = adapter->num_vfs + adapter->num_rx_pools;
8899 unsigned int limit;
8900 int pool, err;
8901
8902 /* Hardware has a limited number of available pools. Each VF, and the
8903 * PF require a pool. Check to ensure we don't attempt to use more
8904 * then the available number of pools.
8905 */
8906 if (used_pools >= IXGBE_MAX_VF_FUNCTIONS)
8907 return ERR_PTR(-EINVAL);
8908
8909 #ifdef CONFIG_RPS
8910 if (vdev->num_rx_queues != vdev->num_tx_queues) {
8911 netdev_info(pdev, "%s: Only supports a single queue count for TX and RX\n",
8912 vdev->name);
8913 return ERR_PTR(-EINVAL);
8914 }
8915 #endif
8916 /* Check for hardware restriction on number of rx/tx queues */
8917 if (vdev->num_tx_queues > IXGBE_MAX_L2A_QUEUES ||
8918 vdev->num_tx_queues == IXGBE_BAD_L2A_QUEUE) {
8919 netdev_info(pdev,
8920 "%s: Supports RX/TX Queue counts 1,2, and 4\n",
8921 pdev->name);
8922 return ERR_PTR(-EINVAL);
8923 }
8924
8925 if (((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
8926 adapter->num_rx_pools > IXGBE_MAX_DCBMACVLANS - 1) ||
8927 (adapter->num_rx_pools > IXGBE_MAX_MACVLANS))
8928 return ERR_PTR(-EBUSY);
8929
8930 fwd_adapter = kzalloc(sizeof(*fwd_adapter), GFP_KERNEL);
8931 if (!fwd_adapter)
8932 return ERR_PTR(-ENOMEM);
8933
8934 pool = find_first_zero_bit(&adapter->fwd_bitmask, 32);
8935 adapter->num_rx_pools++;
8936 set_bit(pool, &adapter->fwd_bitmask);
8937 limit = find_last_bit(&adapter->fwd_bitmask, 32);
8938
8939 /* Enable VMDq flag so device will be set in VM mode */
8940 adapter->flags |= IXGBE_FLAG_VMDQ_ENABLED | IXGBE_FLAG_SRIOV_ENABLED;
8941 adapter->ring_feature[RING_F_VMDQ].limit = limit + 1;
8942 adapter->ring_feature[RING_F_RSS].limit = vdev->num_tx_queues;
8943
8944 /* Force reinit of ring allocation with VMDQ enabled */
8945 err = ixgbe_setup_tc(pdev, netdev_get_num_tc(pdev));
8946 if (err)
8947 goto fwd_add_err;
8948 fwd_adapter->pool = pool;
8949 fwd_adapter->real_adapter = adapter;
8950 err = ixgbe_fwd_ring_up(vdev, fwd_adapter);
8951 if (err)
8952 goto fwd_add_err;
8953 netif_tx_start_all_queues(vdev);
8954 return fwd_adapter;
8955 fwd_add_err:
8956 /* unwind counter and free adapter struct */
8957 netdev_info(pdev,
8958 "%s: dfwd hardware acceleration failed\n", vdev->name);
8959 clear_bit(pool, &adapter->fwd_bitmask);
8960 adapter->num_rx_pools--;
8961 kfree(fwd_adapter);
8962 return ERR_PTR(err);
8963 }
8964
8965 static void ixgbe_fwd_del(struct net_device *pdev, void *priv)
8966 {
8967 struct ixgbe_fwd_adapter *fwd_adapter = priv;
8968 struct ixgbe_adapter *adapter = fwd_adapter->real_adapter;
8969 unsigned int limit;
8970
8971 clear_bit(fwd_adapter->pool, &adapter->fwd_bitmask);
8972 adapter->num_rx_pools--;
8973
8974 limit = find_last_bit(&adapter->fwd_bitmask, 32);
8975 adapter->ring_feature[RING_F_VMDQ].limit = limit + 1;
8976 ixgbe_fwd_ring_down(fwd_adapter->netdev, fwd_adapter);
8977 ixgbe_setup_tc(pdev, netdev_get_num_tc(pdev));
8978 netdev_dbg(pdev, "pool %i:%i queues %i:%i VSI bitmask %lx\n",
8979 fwd_adapter->pool, adapter->num_rx_pools,
8980 fwd_adapter->rx_base_queue,
8981 fwd_adapter->rx_base_queue + adapter->num_rx_queues_per_pool,
8982 adapter->fwd_bitmask);
8983 kfree(fwd_adapter);
8984 }
8985
8986 #define IXGBE_MAX_MAC_HDR_LEN 127
8987 #define IXGBE_MAX_NETWORK_HDR_LEN 511
8988
8989 static netdev_features_t
8990 ixgbe_features_check(struct sk_buff *skb, struct net_device *dev,
8991 netdev_features_t features)
8992 {
8993 unsigned int network_hdr_len, mac_hdr_len;
8994
8995 /* Make certain the headers can be described by a context descriptor */
8996 mac_hdr_len = skb_network_header(skb) - skb->data;
8997 if (unlikely(mac_hdr_len > IXGBE_MAX_MAC_HDR_LEN))
8998 return features & ~(NETIF_F_HW_CSUM |
8999 NETIF_F_SCTP_CRC |
9000 NETIF_F_HW_VLAN_CTAG_TX |
9001 NETIF_F_TSO |
9002 NETIF_F_TSO6);
9003
9004 network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
9005 if (unlikely(network_hdr_len > IXGBE_MAX_NETWORK_HDR_LEN))
9006 return features & ~(NETIF_F_HW_CSUM |
9007 NETIF_F_SCTP_CRC |
9008 NETIF_F_TSO |
9009 NETIF_F_TSO6);
9010
9011 /* We can only support IPV4 TSO in tunnels if we can mangle the
9012 * inner IP ID field, so strip TSO if MANGLEID is not supported.
9013 */
9014 if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))
9015 features &= ~NETIF_F_TSO;
9016
9017 return features;
9018 }
9019
9020 static const struct net_device_ops ixgbe_netdev_ops = {
9021 .ndo_open = ixgbe_open,
9022 .ndo_stop = ixgbe_close,
9023 .ndo_start_xmit = ixgbe_xmit_frame,
9024 .ndo_select_queue = ixgbe_select_queue,
9025 .ndo_set_rx_mode = ixgbe_set_rx_mode,
9026 .ndo_validate_addr = eth_validate_addr,
9027 .ndo_set_mac_address = ixgbe_set_mac,
9028 .ndo_change_mtu = ixgbe_change_mtu,
9029 .ndo_tx_timeout = ixgbe_tx_timeout,
9030 .ndo_set_tx_maxrate = ixgbe_tx_maxrate,
9031 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
9032 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
9033 .ndo_do_ioctl = ixgbe_ioctl,
9034 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
9035 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
9036 .ndo_set_vf_rate = ixgbe_ndo_set_vf_bw,
9037 .ndo_set_vf_spoofchk = ixgbe_ndo_set_vf_spoofchk,
9038 .ndo_set_vf_rss_query_en = ixgbe_ndo_set_vf_rss_query_en,
9039 .ndo_set_vf_trust = ixgbe_ndo_set_vf_trust,
9040 .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
9041 .ndo_get_stats64 = ixgbe_get_stats64,
9042 .ndo_setup_tc = __ixgbe_setup_tc,
9043 #ifdef CONFIG_NET_POLL_CONTROLLER
9044 .ndo_poll_controller = ixgbe_netpoll,
9045 #endif
9046 #ifdef CONFIG_NET_RX_BUSY_POLL
9047 .ndo_busy_poll = ixgbe_low_latency_recv,
9048 #endif
9049 #ifdef IXGBE_FCOE
9050 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
9051 .ndo_fcoe_ddp_target = ixgbe_fcoe_ddp_target,
9052 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
9053 .ndo_fcoe_enable = ixgbe_fcoe_enable,
9054 .ndo_fcoe_disable = ixgbe_fcoe_disable,
9055 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
9056 .ndo_fcoe_get_hbainfo = ixgbe_fcoe_get_hbainfo,
9057 #endif /* IXGBE_FCOE */
9058 .ndo_set_features = ixgbe_set_features,
9059 .ndo_fix_features = ixgbe_fix_features,
9060 .ndo_fdb_add = ixgbe_ndo_fdb_add,
9061 .ndo_bridge_setlink = ixgbe_ndo_bridge_setlink,
9062 .ndo_bridge_getlink = ixgbe_ndo_bridge_getlink,
9063 .ndo_dfwd_add_station = ixgbe_fwd_add,
9064 .ndo_dfwd_del_station = ixgbe_fwd_del,
9065 #ifdef CONFIG_IXGBE_VXLAN
9066 .ndo_add_vxlan_port = ixgbe_add_vxlan_port,
9067 .ndo_del_vxlan_port = ixgbe_del_vxlan_port,
9068 #endif /* CONFIG_IXGBE_VXLAN */
9069 .ndo_features_check = ixgbe_features_check,
9070 };
9071
9072 /**
9073 * ixgbe_enumerate_functions - Get the number of ports this device has
9074 * @adapter: adapter structure
9075 *
9076 * This function enumerates the phsyical functions co-located on a single slot,
9077 * in order to determine how many ports a device has. This is most useful in
9078 * determining the required GT/s of PCIe bandwidth necessary for optimal
9079 * performance.
9080 **/
9081 static inline int ixgbe_enumerate_functions(struct ixgbe_adapter *adapter)
9082 {
9083 struct pci_dev *entry, *pdev = adapter->pdev;
9084 int physfns = 0;
9085
9086 /* Some cards can not use the generic count PCIe functions method,
9087 * because they are behind a parent switch, so we hardcode these with
9088 * the correct number of functions.
9089 */
9090 if (ixgbe_pcie_from_parent(&adapter->hw))
9091 physfns = 4;
9092
9093 list_for_each_entry(entry, &adapter->pdev->bus->devices, bus_list) {
9094 /* don't count virtual functions */
9095 if (entry->is_virtfn)
9096 continue;
9097
9098 /* When the devices on the bus don't all match our device ID,
9099 * we can't reliably determine the correct number of
9100 * functions. This can occur if a function has been direct
9101 * attached to a virtual machine using VT-d, for example. In
9102 * this case, simply return -1 to indicate this.
9103 */
9104 if ((entry->vendor != pdev->vendor) ||
9105 (entry->device != pdev->device))
9106 return -1;
9107
9108 physfns++;
9109 }
9110
9111 return physfns;
9112 }
9113
9114 /**
9115 * ixgbe_wol_supported - Check whether device supports WoL
9116 * @hw: hw specific details
9117 * @device_id: the device ID
9118 * @subdev_id: the subsystem device ID
9119 *
9120 * This function is used by probe and ethtool to determine
9121 * which devices have WoL support
9122 *
9123 **/
9124 int ixgbe_wol_supported(struct ixgbe_adapter *adapter, u16 device_id,
9125 u16 subdevice_id)
9126 {
9127 struct ixgbe_hw *hw = &adapter->hw;
9128 u16 wol_cap = adapter->eeprom_cap & IXGBE_DEVICE_CAPS_WOL_MASK;
9129 int is_wol_supported = 0;
9130
9131 switch (device_id) {
9132 case IXGBE_DEV_ID_82599_SFP:
9133 /* Only these subdevices could supports WOL */
9134 switch (subdevice_id) {
9135 case IXGBE_SUBDEV_ID_82599_SFP_WOL0:
9136 case IXGBE_SUBDEV_ID_82599_560FLR:
9137 /* only support first port */
9138 if (hw->bus.func != 0)
9139 break;
9140 case IXGBE_SUBDEV_ID_82599_SP_560FLR:
9141 case IXGBE_SUBDEV_ID_82599_SFP:
9142 case IXGBE_SUBDEV_ID_82599_RNDC:
9143 case IXGBE_SUBDEV_ID_82599_ECNA_DP:
9144 case IXGBE_SUBDEV_ID_82599_LOM_SFP:
9145 is_wol_supported = 1;
9146 break;
9147 }
9148 break;
9149 case IXGBE_DEV_ID_82599EN_SFP:
9150 /* Only this subdevice supports WOL */
9151 switch (subdevice_id) {
9152 case IXGBE_SUBDEV_ID_82599EN_SFP_OCP1:
9153 is_wol_supported = 1;
9154 break;
9155 }
9156 break;
9157 case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
9158 /* All except this subdevice support WOL */
9159 if (subdevice_id != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ)
9160 is_wol_supported = 1;
9161 break;
9162 case IXGBE_DEV_ID_82599_KX4:
9163 is_wol_supported = 1;
9164 break;
9165 case IXGBE_DEV_ID_X540T:
9166 case IXGBE_DEV_ID_X540T1:
9167 case IXGBE_DEV_ID_X550T:
9168 case IXGBE_DEV_ID_X550T1:
9169 case IXGBE_DEV_ID_X550EM_X_KX4:
9170 case IXGBE_DEV_ID_X550EM_X_KR:
9171 case IXGBE_DEV_ID_X550EM_X_10G_T:
9172 /* check eeprom to see if enabled wol */
9173 if ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0_1) ||
9174 ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0) &&
9175 (hw->bus.func == 0))) {
9176 is_wol_supported = 1;
9177 }
9178 break;
9179 }
9180
9181 return is_wol_supported;
9182 }
9183
9184 /**
9185 * ixgbe_probe - Device Initialization Routine
9186 * @pdev: PCI device information struct
9187 * @ent: entry in ixgbe_pci_tbl
9188 *
9189 * Returns 0 on success, negative on failure
9190 *
9191 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
9192 * The OS initialization, configuring of the adapter private structure,
9193 * and a hardware reset occur.
9194 **/
9195 static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
9196 {
9197 struct net_device *netdev;
9198 struct ixgbe_adapter *adapter = NULL;
9199 struct ixgbe_hw *hw;
9200 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
9201 int i, err, pci_using_dac, expected_gts;
9202 unsigned int indices = MAX_TX_QUEUES;
9203 u8 part_str[IXGBE_PBANUM_LENGTH];
9204 bool disable_dev = false;
9205 #ifdef IXGBE_FCOE
9206 u16 device_caps;
9207 #endif
9208 u32 eec;
9209
9210 /* Catch broken hardware that put the wrong VF device ID in
9211 * the PCIe SR-IOV capability.
9212 */
9213 if (pdev->is_virtfn) {
9214 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
9215 pci_name(pdev), pdev->vendor, pdev->device);
9216 return -EINVAL;
9217 }
9218
9219 err = pci_enable_device_mem(pdev);
9220 if (err)
9221 return err;
9222
9223 if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
9224 pci_using_dac = 1;
9225 } else {
9226 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
9227 if (err) {
9228 dev_err(&pdev->dev,
9229 "No usable DMA configuration, aborting\n");
9230 goto err_dma;
9231 }
9232 pci_using_dac = 0;
9233 }
9234
9235 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
9236 IORESOURCE_MEM), ixgbe_driver_name);
9237 if (err) {
9238 dev_err(&pdev->dev,
9239 "pci_request_selected_regions failed 0x%x\n", err);
9240 goto err_pci_reg;
9241 }
9242
9243 pci_enable_pcie_error_reporting(pdev);
9244
9245 pci_set_master(pdev);
9246 pci_save_state(pdev);
9247
9248 if (ii->mac == ixgbe_mac_82598EB) {
9249 #ifdef CONFIG_IXGBE_DCB
9250 /* 8 TC w/ 4 queues per TC */
9251 indices = 4 * MAX_TRAFFIC_CLASS;
9252 #else
9253 indices = IXGBE_MAX_RSS_INDICES;
9254 #endif
9255 }
9256
9257 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
9258 if (!netdev) {
9259 err = -ENOMEM;
9260 goto err_alloc_etherdev;
9261 }
9262
9263 SET_NETDEV_DEV(netdev, &pdev->dev);
9264
9265 adapter = netdev_priv(netdev);
9266
9267 adapter->netdev = netdev;
9268 adapter->pdev = pdev;
9269 hw = &adapter->hw;
9270 hw->back = adapter;
9271 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
9272
9273 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
9274 pci_resource_len(pdev, 0));
9275 adapter->io_addr = hw->hw_addr;
9276 if (!hw->hw_addr) {
9277 err = -EIO;
9278 goto err_ioremap;
9279 }
9280
9281 netdev->netdev_ops = &ixgbe_netdev_ops;
9282 ixgbe_set_ethtool_ops(netdev);
9283 netdev->watchdog_timeo = 5 * HZ;
9284 strlcpy(netdev->name, pci_name(pdev), sizeof(netdev->name));
9285
9286 /* Setup hw api */
9287 hw->mac.ops = *ii->mac_ops;
9288 hw->mac.type = ii->mac;
9289 hw->mvals = ii->mvals;
9290
9291 /* EEPROM */
9292 hw->eeprom.ops = *ii->eeprom_ops;
9293 eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
9294 if (ixgbe_removed(hw->hw_addr)) {
9295 err = -EIO;
9296 goto err_ioremap;
9297 }
9298 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
9299 if (!(eec & BIT(8)))
9300 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
9301
9302 /* PHY */
9303 hw->phy.ops = *ii->phy_ops;
9304 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
9305 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
9306 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
9307 hw->phy.mdio.mmds = 0;
9308 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
9309 hw->phy.mdio.dev = netdev;
9310 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
9311 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
9312
9313 ii->get_invariants(hw);
9314
9315 /* setup the private structure */
9316 err = ixgbe_sw_init(adapter);
9317 if (err)
9318 goto err_sw_init;
9319
9320 /* Make sure the SWFW semaphore is in a valid state */
9321 if (hw->mac.ops.init_swfw_sync)
9322 hw->mac.ops.init_swfw_sync(hw);
9323
9324 /* Make it possible the adapter to be woken up via WOL */
9325 switch (adapter->hw.mac.type) {
9326 case ixgbe_mac_82599EB:
9327 case ixgbe_mac_X540:
9328 case ixgbe_mac_X550:
9329 case ixgbe_mac_X550EM_x:
9330 case ixgbe_mac_x550em_a:
9331 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
9332 break;
9333 default:
9334 break;
9335 }
9336
9337 /*
9338 * If there is a fan on this device and it has failed log the
9339 * failure.
9340 */
9341 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
9342 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
9343 if (esdp & IXGBE_ESDP_SDP1)
9344 e_crit(probe, "Fan has stopped, replace the adapter\n");
9345 }
9346
9347 if (allow_unsupported_sfp)
9348 hw->allow_unsupported_sfp = allow_unsupported_sfp;
9349
9350 /* reset_hw fills in the perm_addr as well */
9351 hw->phy.reset_if_overtemp = true;
9352 err = hw->mac.ops.reset_hw(hw);
9353 hw->phy.reset_if_overtemp = false;
9354 if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
9355 err = 0;
9356 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
9357 e_dev_err("failed to load because an unsupported SFP+ or QSFP module type was detected.\n");
9358 e_dev_err("Reload the driver after installing a supported module.\n");
9359 goto err_sw_init;
9360 } else if (err) {
9361 e_dev_err("HW Init failed: %d\n", err);
9362 goto err_sw_init;
9363 }
9364
9365 #ifdef CONFIG_PCI_IOV
9366 /* SR-IOV not supported on the 82598 */
9367 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
9368 goto skip_sriov;
9369 /* Mailbox */
9370 ixgbe_init_mbx_params_pf(hw);
9371 hw->mbx.ops = ii->mbx_ops;
9372 pci_sriov_set_totalvfs(pdev, IXGBE_MAX_VFS_DRV_LIMIT);
9373 ixgbe_enable_sriov(adapter);
9374 skip_sriov:
9375
9376 #endif
9377 netdev->features = NETIF_F_SG |
9378 NETIF_F_TSO |
9379 NETIF_F_TSO6 |
9380 NETIF_F_RXHASH |
9381 NETIF_F_RXCSUM |
9382 NETIF_F_HW_CSUM;
9383
9384 #define IXGBE_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
9385 NETIF_F_GSO_GRE_CSUM | \
9386 NETIF_F_GSO_IPIP | \
9387 NETIF_F_GSO_SIT | \
9388 NETIF_F_GSO_UDP_TUNNEL | \
9389 NETIF_F_GSO_UDP_TUNNEL_CSUM)
9390
9391 netdev->gso_partial_features = IXGBE_GSO_PARTIAL_FEATURES;
9392 netdev->features |= NETIF_F_GSO_PARTIAL |
9393 IXGBE_GSO_PARTIAL_FEATURES;
9394
9395 if (hw->mac.type >= ixgbe_mac_82599EB)
9396 netdev->features |= NETIF_F_SCTP_CRC;
9397
9398 /* copy netdev features into list of user selectable features */
9399 netdev->hw_features |= netdev->features |
9400 NETIF_F_HW_VLAN_CTAG_RX |
9401 NETIF_F_HW_VLAN_CTAG_TX |
9402 NETIF_F_RXALL |
9403 NETIF_F_HW_L2FW_DOFFLOAD;
9404
9405 if (hw->mac.type >= ixgbe_mac_82599EB)
9406 netdev->hw_features |= NETIF_F_NTUPLE |
9407 NETIF_F_HW_TC;
9408
9409 if (pci_using_dac)
9410 netdev->features |= NETIF_F_HIGHDMA;
9411
9412 /* set this bit last since it cannot be part of vlan_features */
9413 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
9414 NETIF_F_HW_VLAN_CTAG_RX |
9415 NETIF_F_HW_VLAN_CTAG_TX;
9416
9417 netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
9418 netdev->hw_enc_features |= netdev->vlan_features;
9419 netdev->mpls_features |= NETIF_F_HW_CSUM;
9420
9421 netdev->priv_flags |= IFF_UNICAST_FLT;
9422 netdev->priv_flags |= IFF_SUPP_NOFCS;
9423
9424 #ifdef CONFIG_IXGBE_DCB
9425 netdev->dcbnl_ops = &dcbnl_ops;
9426 #endif
9427
9428 #ifdef IXGBE_FCOE
9429 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
9430 unsigned int fcoe_l;
9431
9432 if (hw->mac.ops.get_device_caps) {
9433 hw->mac.ops.get_device_caps(hw, &device_caps);
9434 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
9435 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
9436 }
9437
9438
9439 fcoe_l = min_t(int, IXGBE_FCRETA_SIZE, num_online_cpus());
9440 adapter->ring_feature[RING_F_FCOE].limit = fcoe_l;
9441
9442 netdev->features |= NETIF_F_FSO |
9443 NETIF_F_FCOE_CRC;
9444
9445 netdev->vlan_features |= NETIF_F_FSO |
9446 NETIF_F_FCOE_CRC |
9447 NETIF_F_FCOE_MTU;
9448 }
9449 #endif /* IXGBE_FCOE */
9450
9451 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
9452 netdev->hw_features |= NETIF_F_LRO;
9453 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
9454 netdev->features |= NETIF_F_LRO;
9455
9456 /* make sure the EEPROM is good */
9457 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
9458 e_dev_err("The EEPROM Checksum Is Not Valid\n");
9459 err = -EIO;
9460 goto err_sw_init;
9461 }
9462
9463 eth_platform_get_mac_address(&adapter->pdev->dev,
9464 adapter->hw.mac.perm_addr);
9465
9466 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
9467
9468 if (!is_valid_ether_addr(netdev->dev_addr)) {
9469 e_dev_err("invalid MAC address\n");
9470 err = -EIO;
9471 goto err_sw_init;
9472 }
9473
9474 /* Set hw->mac.addr to permanent MAC address */
9475 ether_addr_copy(hw->mac.addr, hw->mac.perm_addr);
9476 ixgbe_mac_set_default_filter(adapter);
9477
9478 setup_timer(&adapter->service_timer, &ixgbe_service_timer,
9479 (unsigned long) adapter);
9480
9481 if (ixgbe_removed(hw->hw_addr)) {
9482 err = -EIO;
9483 goto err_sw_init;
9484 }
9485 INIT_WORK(&adapter->service_task, ixgbe_service_task);
9486 set_bit(__IXGBE_SERVICE_INITED, &adapter->state);
9487 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
9488
9489 err = ixgbe_init_interrupt_scheme(adapter);
9490 if (err)
9491 goto err_sw_init;
9492
9493 /* WOL not supported for all devices */
9494 adapter->wol = 0;
9495 hw->eeprom.ops.read(hw, 0x2c, &adapter->eeprom_cap);
9496 hw->wol_enabled = ixgbe_wol_supported(adapter, pdev->device,
9497 pdev->subsystem_device);
9498 if (hw->wol_enabled)
9499 adapter->wol = IXGBE_WUFC_MAG;
9500
9501 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
9502
9503 /* save off EEPROM version number */
9504 hw->eeprom.ops.read(hw, 0x2e, &adapter->eeprom_verh);
9505 hw->eeprom.ops.read(hw, 0x2d, &adapter->eeprom_verl);
9506
9507 /* pick up the PCI bus settings for reporting later */
9508 if (ixgbe_pcie_from_parent(hw))
9509 ixgbe_get_parent_bus_info(adapter);
9510 else
9511 hw->mac.ops.get_bus_info(hw);
9512
9513 /* calculate the expected PCIe bandwidth required for optimal
9514 * performance. Note that some older parts will never have enough
9515 * bandwidth due to being older generation PCIe parts. We clamp these
9516 * parts to ensure no warning is displayed if it can't be fixed.
9517 */
9518 switch (hw->mac.type) {
9519 case ixgbe_mac_82598EB:
9520 expected_gts = min(ixgbe_enumerate_functions(adapter) * 10, 16);
9521 break;
9522 default:
9523 expected_gts = ixgbe_enumerate_functions(adapter) * 10;
9524 break;
9525 }
9526
9527 /* don't check link if we failed to enumerate functions */
9528 if (expected_gts > 0)
9529 ixgbe_check_minimum_link(adapter, expected_gts);
9530
9531 err = ixgbe_read_pba_string_generic(hw, part_str, sizeof(part_str));
9532 if (err)
9533 strlcpy(part_str, "Unknown", sizeof(part_str));
9534 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
9535 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, PBA No: %s\n",
9536 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
9537 part_str);
9538 else
9539 e_dev_info("MAC: %d, PHY: %d, PBA No: %s\n",
9540 hw->mac.type, hw->phy.type, part_str);
9541
9542 e_dev_info("%pM\n", netdev->dev_addr);
9543
9544 /* reset the hardware with the new settings */
9545 err = hw->mac.ops.start_hw(hw);
9546 if (err == IXGBE_ERR_EEPROM_VERSION) {
9547 /* We are running on a pre-production device, log a warning */
9548 e_dev_warn("This device is a pre-production adapter/LOM. "
9549 "Please be aware there may be issues associated "
9550 "with your hardware. If you are experiencing "
9551 "problems please contact your Intel or hardware "
9552 "representative who provided you with this "
9553 "hardware.\n");
9554 }
9555 strcpy(netdev->name, "eth%d");
9556 err = register_netdev(netdev);
9557 if (err)
9558 goto err_register;
9559
9560 pci_set_drvdata(pdev, adapter);
9561
9562 /* power down the optics for 82599 SFP+ fiber */
9563 if (hw->mac.ops.disable_tx_laser)
9564 hw->mac.ops.disable_tx_laser(hw);
9565
9566 /* carrier off reporting is important to ethtool even BEFORE open */
9567 netif_carrier_off(netdev);
9568
9569 #ifdef CONFIG_IXGBE_DCA
9570 if (dca_add_requester(&pdev->dev) == 0) {
9571 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
9572 ixgbe_setup_dca(adapter);
9573 }
9574 #endif
9575 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
9576 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
9577 for (i = 0; i < adapter->num_vfs; i++)
9578 ixgbe_vf_configuration(pdev, (i | 0x10000000));
9579 }
9580
9581 /* firmware requires driver version to be 0xFFFFFFFF
9582 * since os does not support feature
9583 */
9584 if (hw->mac.ops.set_fw_drv_ver)
9585 hw->mac.ops.set_fw_drv_ver(hw, 0xFF, 0xFF, 0xFF,
9586 0xFF);
9587
9588 /* add san mac addr to netdev */
9589 ixgbe_add_sanmac_netdev(netdev);
9590
9591 e_dev_info("%s\n", ixgbe_default_device_descr);
9592
9593 #ifdef CONFIG_IXGBE_HWMON
9594 if (ixgbe_sysfs_init(adapter))
9595 e_err(probe, "failed to allocate sysfs resources\n");
9596 #endif /* CONFIG_IXGBE_HWMON */
9597
9598 ixgbe_dbg_adapter_init(adapter);
9599
9600 /* setup link for SFP devices with MNG FW, else wait for IXGBE_UP */
9601 if (ixgbe_mng_enabled(hw) && ixgbe_is_sfp(hw) && hw->mac.ops.setup_link)
9602 hw->mac.ops.setup_link(hw,
9603 IXGBE_LINK_SPEED_10GB_FULL | IXGBE_LINK_SPEED_1GB_FULL,
9604 true);
9605
9606 return 0;
9607
9608 err_register:
9609 ixgbe_release_hw_control(adapter);
9610 ixgbe_clear_interrupt_scheme(adapter);
9611 err_sw_init:
9612 ixgbe_disable_sriov(adapter);
9613 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
9614 iounmap(adapter->io_addr);
9615 kfree(adapter->mac_table);
9616 err_ioremap:
9617 disable_dev = !test_and_set_bit(__IXGBE_DISABLED, &adapter->state);
9618 free_netdev(netdev);
9619 err_alloc_etherdev:
9620 pci_release_selected_regions(pdev,
9621 pci_select_bars(pdev, IORESOURCE_MEM));
9622 err_pci_reg:
9623 err_dma:
9624 if (!adapter || disable_dev)
9625 pci_disable_device(pdev);
9626 return err;
9627 }
9628
9629 /**
9630 * ixgbe_remove - Device Removal Routine
9631 * @pdev: PCI device information struct
9632 *
9633 * ixgbe_remove is called by the PCI subsystem to alert the driver
9634 * that it should release a PCI device. The could be caused by a
9635 * Hot-Plug event, or because the driver is going to be removed from
9636 * memory.
9637 **/
9638 static void ixgbe_remove(struct pci_dev *pdev)
9639 {
9640 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
9641 struct net_device *netdev;
9642 bool disable_dev;
9643
9644 /* if !adapter then we already cleaned up in probe */
9645 if (!adapter)
9646 return;
9647
9648 netdev = adapter->netdev;
9649 ixgbe_dbg_adapter_exit(adapter);
9650
9651 set_bit(__IXGBE_REMOVING, &adapter->state);
9652 cancel_work_sync(&adapter->service_task);
9653
9654
9655 #ifdef CONFIG_IXGBE_DCA
9656 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
9657 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
9658 dca_remove_requester(&pdev->dev);
9659 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
9660 IXGBE_DCA_CTRL_DCA_DISABLE);
9661 }
9662
9663 #endif
9664 #ifdef CONFIG_IXGBE_HWMON
9665 ixgbe_sysfs_exit(adapter);
9666 #endif /* CONFIG_IXGBE_HWMON */
9667
9668 /* remove the added san mac */
9669 ixgbe_del_sanmac_netdev(netdev);
9670
9671 #ifdef CONFIG_PCI_IOV
9672 ixgbe_disable_sriov(adapter);
9673 #endif
9674 if (netdev->reg_state == NETREG_REGISTERED)
9675 unregister_netdev(netdev);
9676
9677 ixgbe_clear_interrupt_scheme(adapter);
9678
9679 ixgbe_release_hw_control(adapter);
9680
9681 #ifdef CONFIG_DCB
9682 kfree(adapter->ixgbe_ieee_pfc);
9683 kfree(adapter->ixgbe_ieee_ets);
9684
9685 #endif
9686 iounmap(adapter->io_addr);
9687 pci_release_selected_regions(pdev, pci_select_bars(pdev,
9688 IORESOURCE_MEM));
9689
9690 e_dev_info("complete\n");
9691
9692 kfree(adapter->mac_table);
9693 disable_dev = !test_and_set_bit(__IXGBE_DISABLED, &adapter->state);
9694 free_netdev(netdev);
9695
9696 pci_disable_pcie_error_reporting(pdev);
9697
9698 if (disable_dev)
9699 pci_disable_device(pdev);
9700 }
9701
9702 /**
9703 * ixgbe_io_error_detected - called when PCI error is detected
9704 * @pdev: Pointer to PCI device
9705 * @state: The current pci connection state
9706 *
9707 * This function is called after a PCI bus error affecting
9708 * this device has been detected.
9709 */
9710 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
9711 pci_channel_state_t state)
9712 {
9713 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
9714 struct net_device *netdev = adapter->netdev;
9715
9716 #ifdef CONFIG_PCI_IOV
9717 struct ixgbe_hw *hw = &adapter->hw;
9718 struct pci_dev *bdev, *vfdev;
9719 u32 dw0, dw1, dw2, dw3;
9720 int vf, pos;
9721 u16 req_id, pf_func;
9722
9723 if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
9724 adapter->num_vfs == 0)
9725 goto skip_bad_vf_detection;
9726
9727 bdev = pdev->bus->self;
9728 while (bdev && (pci_pcie_type(bdev) != PCI_EXP_TYPE_ROOT_PORT))
9729 bdev = bdev->bus->self;
9730
9731 if (!bdev)
9732 goto skip_bad_vf_detection;
9733
9734 pos = pci_find_ext_capability(bdev, PCI_EXT_CAP_ID_ERR);
9735 if (!pos)
9736 goto skip_bad_vf_detection;
9737
9738 dw0 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG);
9739 dw1 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 4);
9740 dw2 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 8);
9741 dw3 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 12);
9742 if (ixgbe_removed(hw->hw_addr))
9743 goto skip_bad_vf_detection;
9744
9745 req_id = dw1 >> 16;
9746 /* On the 82599 if bit 7 of the requestor ID is set then it's a VF */
9747 if (!(req_id & 0x0080))
9748 goto skip_bad_vf_detection;
9749
9750 pf_func = req_id & 0x01;
9751 if ((pf_func & 1) == (pdev->devfn & 1)) {
9752 unsigned int device_id;
9753
9754 vf = (req_id & 0x7F) >> 1;
9755 e_dev_err("VF %d has caused a PCIe error\n", vf);
9756 e_dev_err("TLP: dw0: %8.8x\tdw1: %8.8x\tdw2: "
9757 "%8.8x\tdw3: %8.8x\n",
9758 dw0, dw1, dw2, dw3);
9759 switch (adapter->hw.mac.type) {
9760 case ixgbe_mac_82599EB:
9761 device_id = IXGBE_82599_VF_DEVICE_ID;
9762 break;
9763 case ixgbe_mac_X540:
9764 device_id = IXGBE_X540_VF_DEVICE_ID;
9765 break;
9766 case ixgbe_mac_X550:
9767 device_id = IXGBE_DEV_ID_X550_VF;
9768 break;
9769 case ixgbe_mac_X550EM_x:
9770 device_id = IXGBE_DEV_ID_X550EM_X_VF;
9771 break;
9772 case ixgbe_mac_x550em_a:
9773 device_id = IXGBE_DEV_ID_X550EM_A_VF;
9774 break;
9775 default:
9776 device_id = 0;
9777 break;
9778 }
9779
9780 /* Find the pci device of the offending VF */
9781 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL, device_id, NULL);
9782 while (vfdev) {
9783 if (vfdev->devfn == (req_id & 0xFF))
9784 break;
9785 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL,
9786 device_id, vfdev);
9787 }
9788 /*
9789 * There's a slim chance the VF could have been hot plugged,
9790 * so if it is no longer present we don't need to issue the
9791 * VFLR. Just clean up the AER in that case.
9792 */
9793 if (vfdev) {
9794 ixgbe_issue_vf_flr(adapter, vfdev);
9795 /* Free device reference count */
9796 pci_dev_put(vfdev);
9797 }
9798
9799 pci_cleanup_aer_uncorrect_error_status(pdev);
9800 }
9801
9802 /*
9803 * Even though the error may have occurred on the other port
9804 * we still need to increment the vf error reference count for
9805 * both ports because the I/O resume function will be called
9806 * for both of them.
9807 */
9808 adapter->vferr_refcount++;
9809
9810 return PCI_ERS_RESULT_RECOVERED;
9811
9812 skip_bad_vf_detection:
9813 #endif /* CONFIG_PCI_IOV */
9814 if (!test_bit(__IXGBE_SERVICE_INITED, &adapter->state))
9815 return PCI_ERS_RESULT_DISCONNECT;
9816
9817 rtnl_lock();
9818 netif_device_detach(netdev);
9819
9820 if (state == pci_channel_io_perm_failure) {
9821 rtnl_unlock();
9822 return PCI_ERS_RESULT_DISCONNECT;
9823 }
9824
9825 if (netif_running(netdev))
9826 ixgbe_down(adapter);
9827
9828 if (!test_and_set_bit(__IXGBE_DISABLED, &adapter->state))
9829 pci_disable_device(pdev);
9830 rtnl_unlock();
9831
9832 /* Request a slot reset. */
9833 return PCI_ERS_RESULT_NEED_RESET;
9834 }
9835
9836 /**
9837 * ixgbe_io_slot_reset - called after the pci bus has been reset.
9838 * @pdev: Pointer to PCI device
9839 *
9840 * Restart the card from scratch, as if from a cold-boot.
9841 */
9842 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
9843 {
9844 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
9845 pci_ers_result_t result;
9846 int err;
9847
9848 if (pci_enable_device_mem(pdev)) {
9849 e_err(probe, "Cannot re-enable PCI device after reset.\n");
9850 result = PCI_ERS_RESULT_DISCONNECT;
9851 } else {
9852 smp_mb__before_atomic();
9853 clear_bit(__IXGBE_DISABLED, &adapter->state);
9854 adapter->hw.hw_addr = adapter->io_addr;
9855 pci_set_master(pdev);
9856 pci_restore_state(pdev);
9857 pci_save_state(pdev);
9858
9859 pci_wake_from_d3(pdev, false);
9860
9861 ixgbe_reset(adapter);
9862 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
9863 result = PCI_ERS_RESULT_RECOVERED;
9864 }
9865
9866 err = pci_cleanup_aer_uncorrect_error_status(pdev);
9867 if (err) {
9868 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
9869 "failed 0x%0x\n", err);
9870 /* non-fatal, continue */
9871 }
9872
9873 return result;
9874 }
9875
9876 /**
9877 * ixgbe_io_resume - called when traffic can start flowing again.
9878 * @pdev: Pointer to PCI device
9879 *
9880 * This callback is called when the error recovery driver tells us that
9881 * its OK to resume normal operation.
9882 */
9883 static void ixgbe_io_resume(struct pci_dev *pdev)
9884 {
9885 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
9886 struct net_device *netdev = adapter->netdev;
9887
9888 #ifdef CONFIG_PCI_IOV
9889 if (adapter->vferr_refcount) {
9890 e_info(drv, "Resuming after VF err\n");
9891 adapter->vferr_refcount--;
9892 return;
9893 }
9894
9895 #endif
9896 if (netif_running(netdev))
9897 ixgbe_up(adapter);
9898
9899 netif_device_attach(netdev);
9900 }
9901
9902 static const struct pci_error_handlers ixgbe_err_handler = {
9903 .error_detected = ixgbe_io_error_detected,
9904 .slot_reset = ixgbe_io_slot_reset,
9905 .resume = ixgbe_io_resume,
9906 };
9907
9908 static struct pci_driver ixgbe_driver = {
9909 .name = ixgbe_driver_name,
9910 .id_table = ixgbe_pci_tbl,
9911 .probe = ixgbe_probe,
9912 .remove = ixgbe_remove,
9913 #ifdef CONFIG_PM
9914 .suspend = ixgbe_suspend,
9915 .resume = ixgbe_resume,
9916 #endif
9917 .shutdown = ixgbe_shutdown,
9918 .sriov_configure = ixgbe_pci_sriov_configure,
9919 .err_handler = &ixgbe_err_handler
9920 };
9921
9922 /**
9923 * ixgbe_init_module - Driver Registration Routine
9924 *
9925 * ixgbe_init_module is the first routine called when the driver is
9926 * loaded. All it does is register with the PCI subsystem.
9927 **/
9928 static int __init ixgbe_init_module(void)
9929 {
9930 int ret;
9931 pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
9932 pr_info("%s\n", ixgbe_copyright);
9933
9934 ixgbe_wq = create_singlethread_workqueue(ixgbe_driver_name);
9935 if (!ixgbe_wq) {
9936 pr_err("%s: Failed to create workqueue\n", ixgbe_driver_name);
9937 return -ENOMEM;
9938 }
9939
9940 ixgbe_dbg_init();
9941
9942 ret = pci_register_driver(&ixgbe_driver);
9943 if (ret) {
9944 ixgbe_dbg_exit();
9945 return ret;
9946 }
9947
9948 #ifdef CONFIG_IXGBE_DCA
9949 dca_register_notify(&dca_notifier);
9950 #endif
9951
9952 return 0;
9953 }
9954
9955 module_init(ixgbe_init_module);
9956
9957 /**
9958 * ixgbe_exit_module - Driver Exit Cleanup Routine
9959 *
9960 * ixgbe_exit_module is called just before the driver is removed
9961 * from memory.
9962 **/
9963 static void __exit ixgbe_exit_module(void)
9964 {
9965 #ifdef CONFIG_IXGBE_DCA
9966 dca_unregister_notify(&dca_notifier);
9967 #endif
9968 pci_unregister_driver(&ixgbe_driver);
9969
9970 ixgbe_dbg_exit();
9971 if (ixgbe_wq) {
9972 destroy_workqueue(ixgbe_wq);
9973 ixgbe_wq = NULL;
9974 }
9975 }
9976
9977 #ifdef CONFIG_IXGBE_DCA
9978 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
9979 void *p)
9980 {
9981 int ret_val;
9982
9983 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
9984 __ixgbe_notify_dca);
9985
9986 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
9987 }
9988
9989 #endif /* CONFIG_IXGBE_DCA */
9990
9991 module_exit(ixgbe_exit_module);
9992
9993 /* ixgbe_main.c */
Linux kernel - Deliverables
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