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ixgbe: Add work around for empty SFP+ cage crosstalk
[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
57 #include "ixgbe.h"
58 #include "ixgbe_common.h"
59 #include "ixgbe_dcb_82599.h"
60 #include "ixgbe_sriov.h"
61 #include "ixgbe_model.h"
62
63 char ixgbe_driver_name[] = "ixgbe";
64 static const char ixgbe_driver_string[] =
65 "Intel(R) 10 Gigabit PCI Express Network Driver";
66 #ifdef IXGBE_FCOE
67 char ixgbe_default_device_descr[] =
68 "Intel(R) 10 Gigabit Network Connection";
69 #else
70 static char ixgbe_default_device_descr[] =
71 "Intel(R) 10 Gigabit Network Connection";
72 #endif
73 #define DRV_VERSION "4.4.0-k"
74 const char ixgbe_driver_version[] = DRV_VERSION;
75 static const char ixgbe_copyright[] =
76 "Copyright (c) 1999-2016 Intel Corporation.";
77
78 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";
79
80 static const struct ixgbe_info *ixgbe_info_tbl[] = {
81 [board_82598] = &ixgbe_82598_info,
82 [board_82599] = &ixgbe_82599_info,
83 [board_X540] = &ixgbe_X540_info,
84 [board_X550] = &ixgbe_X550_info,
85 [board_X550EM_x] = &ixgbe_X550EM_x_info,
86 [board_x550em_a] = &ixgbe_x550em_a_info,
87 };
88
89 /* ixgbe_pci_tbl - PCI Device ID Table
90 *
91 * Wildcard entries (PCI_ANY_ID) should come last
92 * Last entry must be all 0s
93 *
94 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
95 * Class, Class Mask, private data (not used) }
96 */
97 static const struct pci_device_id ixgbe_pci_tbl[] = {
98 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598), board_82598 },
99 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT), board_82598 },
100 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT), board_82598 },
101 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT), board_82598 },
102 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2), board_82598 },
103 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4), board_82598 },
104 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT), board_82598 },
105 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT), board_82598 },
106 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM), board_82598 },
107 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR), board_82598 },
108 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM), board_82598 },
109 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX), board_82598 },
110 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4), board_82599 },
111 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM), board_82599 },
112 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR), board_82599 },
113 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP), board_82599 },
114 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM), board_82599 },
115 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ), board_82599 },
116 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4), board_82599 },
117 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_BACKPLANE_FCOE), board_82599 },
118 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_FCOE), board_82599 },
119 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM), board_82599 },
120 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE), board_82599 },
121 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T), board_X540 },
122 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF2), board_82599 },
123 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_LS), board_82599 },
124 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_QSFP_SF_QP), board_82599 },
125 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599EN_SFP), board_82599 },
126 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF_QP), board_82599 },
127 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T1), board_X540 },
128 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550T), board_X550},
129 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550T1), board_X550},
130 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_KX4), board_X550EM_x},
131 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_KR), board_X550EM_x},
132 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_10G_T), board_X550EM_x},
133 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_SFP), board_X550EM_x},
134 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_KR), board_x550em_a },
135 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_KR_L), board_x550em_a },
136 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SFP_N), board_x550em_a },
137 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SGMII), board_x550em_a },
138 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SGMII_L), board_x550em_a },
139 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_SFP), board_x550em_a },
140 /* required last entry */
141 {0, }
142 };
143 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
144
145 #ifdef CONFIG_IXGBE_DCA
146 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
147 void *p);
148 static struct notifier_block dca_notifier = {
149 .notifier_call = ixgbe_notify_dca,
150 .next = NULL,
151 .priority = 0
152 };
153 #endif
154
155 #ifdef CONFIG_PCI_IOV
156 static unsigned int max_vfs;
157 module_param(max_vfs, uint, 0);
158 MODULE_PARM_DESC(max_vfs,
159 "Maximum number of virtual functions to allocate per physical function - default is zero and maximum value is 63. (Deprecated)");
160 #endif /* CONFIG_PCI_IOV */
161
162 static unsigned int allow_unsupported_sfp;
163 module_param(allow_unsupported_sfp, uint, 0);
164 MODULE_PARM_DESC(allow_unsupported_sfp,
165 "Allow unsupported and untested SFP+ modules on 82599-based adapters");
166
167 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
168 static int debug = -1;
169 module_param(debug, int, 0);
170 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
171
172 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
173 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
174 MODULE_LICENSE("GPL");
175 MODULE_VERSION(DRV_VERSION);
176
177 static struct workqueue_struct *ixgbe_wq;
178
179 static bool ixgbe_check_cfg_remove(struct ixgbe_hw *hw, struct pci_dev *pdev);
180
181 static int ixgbe_read_pci_cfg_word_parent(struct ixgbe_adapter *adapter,
182 u32 reg, u16 *value)
183 {
184 struct pci_dev *parent_dev;
185 struct pci_bus *parent_bus;
186
187 parent_bus = adapter->pdev->bus->parent;
188 if (!parent_bus)
189 return -1;
190
191 parent_dev = parent_bus->self;
192 if (!parent_dev)
193 return -1;
194
195 if (!pci_is_pcie(parent_dev))
196 return -1;
197
198 pcie_capability_read_word(parent_dev, reg, value);
199 if (*value == IXGBE_FAILED_READ_CFG_WORD &&
200 ixgbe_check_cfg_remove(&adapter->hw, parent_dev))
201 return -1;
202 return 0;
203 }
204
205 static s32 ixgbe_get_parent_bus_info(struct ixgbe_adapter *adapter)
206 {
207 struct ixgbe_hw *hw = &adapter->hw;
208 u16 link_status = 0;
209 int err;
210
211 hw->bus.type = ixgbe_bus_type_pci_express;
212
213 /* Get the negotiated link width and speed from PCI config space of the
214 * parent, as this device is behind a switch
215 */
216 err = ixgbe_read_pci_cfg_word_parent(adapter, 18, &link_status);
217
218 /* assume caller will handle error case */
219 if (err)
220 return err;
221
222 hw->bus.width = ixgbe_convert_bus_width(link_status);
223 hw->bus.speed = ixgbe_convert_bus_speed(link_status);
224
225 return 0;
226 }
227
228 /**
229 * ixgbe_check_from_parent - Determine whether PCIe info should come from parent
230 * @hw: hw specific details
231 *
232 * This function is used by probe to determine whether a device's PCI-Express
233 * bandwidth details should be gathered from the parent bus instead of from the
234 * device. Used to ensure that various locations all have the correct device ID
235 * checks.
236 */
237 static inline bool ixgbe_pcie_from_parent(struct ixgbe_hw *hw)
238 {
239 switch (hw->device_id) {
240 case IXGBE_DEV_ID_82599_SFP_SF_QP:
241 case IXGBE_DEV_ID_82599_QSFP_SF_QP:
242 return true;
243 default:
244 return false;
245 }
246 }
247
248 static void ixgbe_check_minimum_link(struct ixgbe_adapter *adapter,
249 int expected_gts)
250 {
251 struct ixgbe_hw *hw = &adapter->hw;
252 int max_gts = 0;
253 enum pci_bus_speed speed = PCI_SPEED_UNKNOWN;
254 enum pcie_link_width width = PCIE_LNK_WIDTH_UNKNOWN;
255 struct pci_dev *pdev;
256
257 /* Some devices are not connected over PCIe and thus do not negotiate
258 * speed. These devices do not have valid bus info, and thus any report
259 * we generate may not be correct.
260 */
261 if (hw->bus.type == ixgbe_bus_type_internal)
262 return;
263
264 /* determine whether to use the parent device */
265 if (ixgbe_pcie_from_parent(&adapter->hw))
266 pdev = adapter->pdev->bus->parent->self;
267 else
268 pdev = adapter->pdev;
269
270 if (pcie_get_minimum_link(pdev, &speed, &width) ||
271 speed == PCI_SPEED_UNKNOWN || width == PCIE_LNK_WIDTH_UNKNOWN) {
272 e_dev_warn("Unable to determine PCI Express bandwidth.\n");
273 return;
274 }
275
276 switch (speed) {
277 case PCIE_SPEED_2_5GT:
278 /* 8b/10b encoding reduces max throughput by 20% */
279 max_gts = 2 * width;
280 break;
281 case PCIE_SPEED_5_0GT:
282 /* 8b/10b encoding reduces max throughput by 20% */
283 max_gts = 4 * width;
284 break;
285 case PCIE_SPEED_8_0GT:
286 /* 128b/130b encoding reduces throughput by less than 2% */
287 max_gts = 8 * width;
288 break;
289 default:
290 e_dev_warn("Unable to determine PCI Express bandwidth.\n");
291 return;
292 }
293
294 e_dev_info("PCI Express bandwidth of %dGT/s available\n",
295 max_gts);
296 e_dev_info("(Speed:%s, Width: x%d, Encoding Loss:%s)\n",
297 (speed == PCIE_SPEED_8_0GT ? "8.0GT/s" :
298 speed == PCIE_SPEED_5_0GT ? "5.0GT/s" :
299 speed == PCIE_SPEED_2_5GT ? "2.5GT/s" :
300 "Unknown"),
301 width,
302 (speed == PCIE_SPEED_2_5GT ? "20%" :
303 speed == PCIE_SPEED_5_0GT ? "20%" :
304 speed == PCIE_SPEED_8_0GT ? "<2%" :
305 "Unknown"));
306
307 if (max_gts < expected_gts) {
308 e_dev_warn("This is not sufficient for optimal performance of this card.\n");
309 e_dev_warn("For optimal performance, at least %dGT/s of bandwidth is required.\n",
310 expected_gts);
311 e_dev_warn("A slot with more lanes and/or higher speed is suggested.\n");
312 }
313 }
314
315 static void ixgbe_service_event_schedule(struct ixgbe_adapter *adapter)
316 {
317 if (!test_bit(__IXGBE_DOWN, &adapter->state) &&
318 !test_bit(__IXGBE_REMOVING, &adapter->state) &&
319 !test_and_set_bit(__IXGBE_SERVICE_SCHED, &adapter->state))
320 queue_work(ixgbe_wq, &adapter->service_task);
321 }
322
323 static void ixgbe_remove_adapter(struct ixgbe_hw *hw)
324 {
325 struct ixgbe_adapter *adapter = hw->back;
326
327 if (!hw->hw_addr)
328 return;
329 hw->hw_addr = NULL;
330 e_dev_err("Adapter removed\n");
331 if (test_bit(__IXGBE_SERVICE_INITED, &adapter->state))
332 ixgbe_service_event_schedule(adapter);
333 }
334
335 static void ixgbe_check_remove(struct ixgbe_hw *hw, u32 reg)
336 {
337 u32 value;
338
339 /* The following check not only optimizes a bit by not
340 * performing a read on the status register when the
341 * register just read was a status register read that
342 * returned IXGBE_FAILED_READ_REG. It also blocks any
343 * potential recursion.
344 */
345 if (reg == IXGBE_STATUS) {
346 ixgbe_remove_adapter(hw);
347 return;
348 }
349 value = ixgbe_read_reg(hw, IXGBE_STATUS);
350 if (value == IXGBE_FAILED_READ_REG)
351 ixgbe_remove_adapter(hw);
352 }
353
354 /**
355 * ixgbe_read_reg - Read from device register
356 * @hw: hw specific details
357 * @reg: offset of register to read
358 *
359 * Returns : value read or IXGBE_FAILED_READ_REG if removed
360 *
361 * This function is used to read device registers. It checks for device
362 * removal by confirming any read that returns all ones by checking the
363 * status register value for all ones. This function avoids reading from
364 * the hardware if a removal was previously detected in which case it
365 * returns IXGBE_FAILED_READ_REG (all ones).
366 */
367 u32 ixgbe_read_reg(struct ixgbe_hw *hw, u32 reg)
368 {
369 u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr);
370 u32 value;
371
372 if (ixgbe_removed(reg_addr))
373 return IXGBE_FAILED_READ_REG;
374 if (unlikely(hw->phy.nw_mng_if_sel &
375 IXGBE_NW_MNG_IF_SEL_ENABLE_10_100M)) {
376 struct ixgbe_adapter *adapter;
377 int i;
378
379 for (i = 0; i < 200; ++i) {
380 value = readl(reg_addr + IXGBE_MAC_SGMII_BUSY);
381 if (likely(!value))
382 goto writes_completed;
383 if (value == IXGBE_FAILED_READ_REG) {
384 ixgbe_remove_adapter(hw);
385 return IXGBE_FAILED_READ_REG;
386 }
387 udelay(5);
388 }
389
390 adapter = hw->back;
391 e_warn(hw, "register writes incomplete %08x\n", value);
392 }
393
394 writes_completed:
395 value = readl(reg_addr + reg);
396 if (unlikely(value == IXGBE_FAILED_READ_REG))
397 ixgbe_check_remove(hw, reg);
398 return value;
399 }
400
401 static bool ixgbe_check_cfg_remove(struct ixgbe_hw *hw, struct pci_dev *pdev)
402 {
403 u16 value;
404
405 pci_read_config_word(pdev, PCI_VENDOR_ID, &value);
406 if (value == IXGBE_FAILED_READ_CFG_WORD) {
407 ixgbe_remove_adapter(hw);
408 return true;
409 }
410 return false;
411 }
412
413 u16 ixgbe_read_pci_cfg_word(struct ixgbe_hw *hw, u32 reg)
414 {
415 struct ixgbe_adapter *adapter = hw->back;
416 u16 value;
417
418 if (ixgbe_removed(hw->hw_addr))
419 return IXGBE_FAILED_READ_CFG_WORD;
420 pci_read_config_word(adapter->pdev, reg, &value);
421 if (value == IXGBE_FAILED_READ_CFG_WORD &&
422 ixgbe_check_cfg_remove(hw, adapter->pdev))
423 return IXGBE_FAILED_READ_CFG_WORD;
424 return value;
425 }
426
427 #ifdef CONFIG_PCI_IOV
428 static u32 ixgbe_read_pci_cfg_dword(struct ixgbe_hw *hw, u32 reg)
429 {
430 struct ixgbe_adapter *adapter = hw->back;
431 u32 value;
432
433 if (ixgbe_removed(hw->hw_addr))
434 return IXGBE_FAILED_READ_CFG_DWORD;
435 pci_read_config_dword(adapter->pdev, reg, &value);
436 if (value == IXGBE_FAILED_READ_CFG_DWORD &&
437 ixgbe_check_cfg_remove(hw, adapter->pdev))
438 return IXGBE_FAILED_READ_CFG_DWORD;
439 return value;
440 }
441 #endif /* CONFIG_PCI_IOV */
442
443 void ixgbe_write_pci_cfg_word(struct ixgbe_hw *hw, u32 reg, u16 value)
444 {
445 struct ixgbe_adapter *adapter = hw->back;
446
447 if (ixgbe_removed(hw->hw_addr))
448 return;
449 pci_write_config_word(adapter->pdev, reg, value);
450 }
451
452 static void ixgbe_service_event_complete(struct ixgbe_adapter *adapter)
453 {
454 BUG_ON(!test_bit(__IXGBE_SERVICE_SCHED, &adapter->state));
455
456 /* flush memory to make sure state is correct before next watchdog */
457 smp_mb__before_atomic();
458 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
459 }
460
461 struct ixgbe_reg_info {
462 u32 ofs;
463 char *name;
464 };
465
466 static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {
467
468 /* General Registers */
469 {IXGBE_CTRL, "CTRL"},
470 {IXGBE_STATUS, "STATUS"},
471 {IXGBE_CTRL_EXT, "CTRL_EXT"},
472
473 /* Interrupt Registers */
474 {IXGBE_EICR, "EICR"},
475
476 /* RX Registers */
477 {IXGBE_SRRCTL(0), "SRRCTL"},
478 {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
479 {IXGBE_RDLEN(0), "RDLEN"},
480 {IXGBE_RDH(0), "RDH"},
481 {IXGBE_RDT(0), "RDT"},
482 {IXGBE_RXDCTL(0), "RXDCTL"},
483 {IXGBE_RDBAL(0), "RDBAL"},
484 {IXGBE_RDBAH(0), "RDBAH"},
485
486 /* TX Registers */
487 {IXGBE_TDBAL(0), "TDBAL"},
488 {IXGBE_TDBAH(0), "TDBAH"},
489 {IXGBE_TDLEN(0), "TDLEN"},
490 {IXGBE_TDH(0), "TDH"},
491 {IXGBE_TDT(0), "TDT"},
492 {IXGBE_TXDCTL(0), "TXDCTL"},
493
494 /* List Terminator */
495 { .name = NULL }
496 };
497
498
499 /*
500 * ixgbe_regdump - register printout routine
501 */
502 static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
503 {
504 int i = 0, j = 0;
505 char rname[16];
506 u32 regs[64];
507
508 switch (reginfo->ofs) {
509 case IXGBE_SRRCTL(0):
510 for (i = 0; i < 64; i++)
511 regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
512 break;
513 case IXGBE_DCA_RXCTRL(0):
514 for (i = 0; i < 64; i++)
515 regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
516 break;
517 case IXGBE_RDLEN(0):
518 for (i = 0; i < 64; i++)
519 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
520 break;
521 case IXGBE_RDH(0):
522 for (i = 0; i < 64; i++)
523 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
524 break;
525 case IXGBE_RDT(0):
526 for (i = 0; i < 64; i++)
527 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
528 break;
529 case IXGBE_RXDCTL(0):
530 for (i = 0; i < 64; i++)
531 regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
532 break;
533 case IXGBE_RDBAL(0):
534 for (i = 0; i < 64; i++)
535 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
536 break;
537 case IXGBE_RDBAH(0):
538 for (i = 0; i < 64; i++)
539 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
540 break;
541 case IXGBE_TDBAL(0):
542 for (i = 0; i < 64; i++)
543 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
544 break;
545 case IXGBE_TDBAH(0):
546 for (i = 0; i < 64; i++)
547 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
548 break;
549 case IXGBE_TDLEN(0):
550 for (i = 0; i < 64; i++)
551 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
552 break;
553 case IXGBE_TDH(0):
554 for (i = 0; i < 64; i++)
555 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
556 break;
557 case IXGBE_TDT(0):
558 for (i = 0; i < 64; i++)
559 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
560 break;
561 case IXGBE_TXDCTL(0):
562 for (i = 0; i < 64; i++)
563 regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
564 break;
565 default:
566 pr_info("%-15s %08x\n", reginfo->name,
567 IXGBE_READ_REG(hw, reginfo->ofs));
568 return;
569 }
570
571 for (i = 0; i < 8; i++) {
572 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7);
573 pr_err("%-15s", rname);
574 for (j = 0; j < 8; j++)
575 pr_cont(" %08x", regs[i*8+j]);
576 pr_cont("\n");
577 }
578
579 }
580
581 /*
582 * ixgbe_dump - Print registers, tx-rings and rx-rings
583 */
584 static void ixgbe_dump(struct ixgbe_adapter *adapter)
585 {
586 struct net_device *netdev = adapter->netdev;
587 struct ixgbe_hw *hw = &adapter->hw;
588 struct ixgbe_reg_info *reginfo;
589 int n = 0;
590 struct ixgbe_ring *tx_ring;
591 struct ixgbe_tx_buffer *tx_buffer;
592 union ixgbe_adv_tx_desc *tx_desc;
593 struct my_u0 { u64 a; u64 b; } *u0;
594 struct ixgbe_ring *rx_ring;
595 union ixgbe_adv_rx_desc *rx_desc;
596 struct ixgbe_rx_buffer *rx_buffer_info;
597 u32 staterr;
598 int i = 0;
599
600 if (!netif_msg_hw(adapter))
601 return;
602
603 /* Print netdevice Info */
604 if (netdev) {
605 dev_info(&adapter->pdev->dev, "Net device Info\n");
606 pr_info("Device Name state "
607 "trans_start last_rx\n");
608 pr_info("%-15s %016lX %016lX %016lX\n",
609 netdev->name,
610 netdev->state,
611 netdev->trans_start,
612 netdev->last_rx);
613 }
614
615 /* Print Registers */
616 dev_info(&adapter->pdev->dev, "Register Dump\n");
617 pr_info(" Register Name Value\n");
618 for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
619 reginfo->name; reginfo++) {
620 ixgbe_regdump(hw, reginfo);
621 }
622
623 /* Print TX Ring Summary */
624 if (!netdev || !netif_running(netdev))
625 return;
626
627 dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
628 pr_info(" %s %s %s %s\n",
629 "Queue [NTU] [NTC] [bi(ntc)->dma ]",
630 "leng", "ntw", "timestamp");
631 for (n = 0; n < adapter->num_tx_queues; n++) {
632 tx_ring = adapter->tx_ring[n];
633 tx_buffer = &tx_ring->tx_buffer_info[tx_ring->next_to_clean];
634 pr_info(" %5d %5X %5X %016llX %08X %p %016llX\n",
635 n, tx_ring->next_to_use, tx_ring->next_to_clean,
636 (u64)dma_unmap_addr(tx_buffer, dma),
637 dma_unmap_len(tx_buffer, len),
638 tx_buffer->next_to_watch,
639 (u64)tx_buffer->time_stamp);
640 }
641
642 /* Print TX Rings */
643 if (!netif_msg_tx_done(adapter))
644 goto rx_ring_summary;
645
646 dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
647
648 /* Transmit Descriptor Formats
649 *
650 * 82598 Advanced Transmit Descriptor
651 * +--------------------------------------------------------------+
652 * 0 | Buffer Address [63:0] |
653 * +--------------------------------------------------------------+
654 * 8 | PAYLEN | POPTS | IDX | STA | DCMD |DTYP | RSV | DTALEN |
655 * +--------------------------------------------------------------+
656 * 63 46 45 40 39 36 35 32 31 24 23 20 19 0
657 *
658 * 82598 Advanced Transmit Descriptor (Write-Back Format)
659 * +--------------------------------------------------------------+
660 * 0 | RSV [63:0] |
661 * +--------------------------------------------------------------+
662 * 8 | RSV | STA | NXTSEQ |
663 * +--------------------------------------------------------------+
664 * 63 36 35 32 31 0
665 *
666 * 82599+ Advanced Transmit Descriptor
667 * +--------------------------------------------------------------+
668 * 0 | Buffer Address [63:0] |
669 * +--------------------------------------------------------------+
670 * 8 |PAYLEN |POPTS|CC|IDX |STA |DCMD |DTYP |MAC |RSV |DTALEN |
671 * +--------------------------------------------------------------+
672 * 63 46 45 40 39 38 36 35 32 31 24 23 20 19 18 17 16 15 0
673 *
674 * 82599+ Advanced Transmit Descriptor (Write-Back Format)
675 * +--------------------------------------------------------------+
676 * 0 | RSV [63:0] |
677 * +--------------------------------------------------------------+
678 * 8 | RSV | STA | RSV |
679 * +--------------------------------------------------------------+
680 * 63 36 35 32 31 0
681 */
682
683 for (n = 0; n < adapter->num_tx_queues; n++) {
684 tx_ring = adapter->tx_ring[n];
685 pr_info("------------------------------------\n");
686 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index);
687 pr_info("------------------------------------\n");
688 pr_info("%s%s %s %s %s %s\n",
689 "T [desc] [address 63:0 ] ",
690 "[PlPOIdStDDt Ln] [bi->dma ] ",
691 "leng", "ntw", "timestamp", "bi->skb");
692
693 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
694 tx_desc = IXGBE_TX_DESC(tx_ring, i);
695 tx_buffer = &tx_ring->tx_buffer_info[i];
696 u0 = (struct my_u0 *)tx_desc;
697 if (dma_unmap_len(tx_buffer, len) > 0) {
698 pr_info("T [0x%03X] %016llX %016llX %016llX %08X %p %016llX %p",
699 i,
700 le64_to_cpu(u0->a),
701 le64_to_cpu(u0->b),
702 (u64)dma_unmap_addr(tx_buffer, dma),
703 dma_unmap_len(tx_buffer, len),
704 tx_buffer->next_to_watch,
705 (u64)tx_buffer->time_stamp,
706 tx_buffer->skb);
707 if (i == tx_ring->next_to_use &&
708 i == tx_ring->next_to_clean)
709 pr_cont(" NTC/U\n");
710 else if (i == tx_ring->next_to_use)
711 pr_cont(" NTU\n");
712 else if (i == tx_ring->next_to_clean)
713 pr_cont(" NTC\n");
714 else
715 pr_cont("\n");
716
717 if (netif_msg_pktdata(adapter) &&
718 tx_buffer->skb)
719 print_hex_dump(KERN_INFO, "",
720 DUMP_PREFIX_ADDRESS, 16, 1,
721 tx_buffer->skb->data,
722 dma_unmap_len(tx_buffer, len),
723 true);
724 }
725 }
726 }
727
728 /* Print RX Rings Summary */
729 rx_ring_summary:
730 dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
731 pr_info("Queue [NTU] [NTC]\n");
732 for (n = 0; n < adapter->num_rx_queues; n++) {
733 rx_ring = adapter->rx_ring[n];
734 pr_info("%5d %5X %5X\n",
735 n, rx_ring->next_to_use, rx_ring->next_to_clean);
736 }
737
738 /* Print RX Rings */
739 if (!netif_msg_rx_status(adapter))
740 return;
741
742 dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
743
744 /* Receive Descriptor Formats
745 *
746 * 82598 Advanced Receive Descriptor (Read) Format
747 * 63 1 0
748 * +-----------------------------------------------------+
749 * 0 | Packet Buffer Address [63:1] |A0/NSE|
750 * +----------------------------------------------+------+
751 * 8 | Header Buffer Address [63:1] | DD |
752 * +-----------------------------------------------------+
753 *
754 *
755 * 82598 Advanced Receive Descriptor (Write-Back) Format
756 *
757 * 63 48 47 32 31 30 21 20 16 15 4 3 0
758 * +------------------------------------------------------+
759 * 0 | RSS Hash / |SPH| HDR_LEN | RSV |Packet| RSS |
760 * | Packet | IP | | | | Type | Type |
761 * | Checksum | Ident | | | | | |
762 * +------------------------------------------------------+
763 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
764 * +------------------------------------------------------+
765 * 63 48 47 32 31 20 19 0
766 *
767 * 82599+ Advanced Receive Descriptor (Read) Format
768 * 63 1 0
769 * +-----------------------------------------------------+
770 * 0 | Packet Buffer Address [63:1] |A0/NSE|
771 * +----------------------------------------------+------+
772 * 8 | Header Buffer Address [63:1] | DD |
773 * +-----------------------------------------------------+
774 *
775 *
776 * 82599+ Advanced Receive Descriptor (Write-Back) Format
777 *
778 * 63 48 47 32 31 30 21 20 17 16 4 3 0
779 * +------------------------------------------------------+
780 * 0 |RSS / Frag Checksum|SPH| HDR_LEN |RSC- |Packet| RSS |
781 * |/ RTT / PCoE_PARAM | | | CNT | Type | Type |
782 * |/ Flow Dir Flt ID | | | | | |
783 * +------------------------------------------------------+
784 * 8 | VLAN Tag | Length |Extended Error| Xtnd Status/NEXTP |
785 * +------------------------------------------------------+
786 * 63 48 47 32 31 20 19 0
787 */
788
789 for (n = 0; n < adapter->num_rx_queues; n++) {
790 rx_ring = adapter->rx_ring[n];
791 pr_info("------------------------------------\n");
792 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index);
793 pr_info("------------------------------------\n");
794 pr_info("%s%s%s",
795 "R [desc] [ PktBuf A0] ",
796 "[ HeadBuf DD] [bi->dma ] [bi->skb ] ",
797 "<-- Adv Rx Read format\n");
798 pr_info("%s%s%s",
799 "RWB[desc] [PcsmIpSHl PtRs] ",
800 "[vl er S cks ln] ---------------- [bi->skb ] ",
801 "<-- Adv Rx Write-Back format\n");
802
803 for (i = 0; i < rx_ring->count; i++) {
804 rx_buffer_info = &rx_ring->rx_buffer_info[i];
805 rx_desc = IXGBE_RX_DESC(rx_ring, i);
806 u0 = (struct my_u0 *)rx_desc;
807 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
808 if (staterr & IXGBE_RXD_STAT_DD) {
809 /* Descriptor Done */
810 pr_info("RWB[0x%03X] %016llX "
811 "%016llX ---------------- %p", i,
812 le64_to_cpu(u0->a),
813 le64_to_cpu(u0->b),
814 rx_buffer_info->skb);
815 } else {
816 pr_info("R [0x%03X] %016llX "
817 "%016llX %016llX %p", i,
818 le64_to_cpu(u0->a),
819 le64_to_cpu(u0->b),
820 (u64)rx_buffer_info->dma,
821 rx_buffer_info->skb);
822
823 if (netif_msg_pktdata(adapter) &&
824 rx_buffer_info->dma) {
825 print_hex_dump(KERN_INFO, "",
826 DUMP_PREFIX_ADDRESS, 16, 1,
827 page_address(rx_buffer_info->page) +
828 rx_buffer_info->page_offset,
829 ixgbe_rx_bufsz(rx_ring), true);
830 }
831 }
832
833 if (i == rx_ring->next_to_use)
834 pr_cont(" NTU\n");
835 else if (i == rx_ring->next_to_clean)
836 pr_cont(" NTC\n");
837 else
838 pr_cont("\n");
839
840 }
841 }
842 }
843
844 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
845 {
846 u32 ctrl_ext;
847
848 /* Let firmware take over control of h/w */
849 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
850 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
851 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
852 }
853
854 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
855 {
856 u32 ctrl_ext;
857
858 /* Let firmware know the driver has taken over */
859 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
860 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
861 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
862 }
863
864 /**
865 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
866 * @adapter: pointer to adapter struct
867 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
868 * @queue: queue to map the corresponding interrupt to
869 * @msix_vector: the vector to map to the corresponding queue
870 *
871 */
872 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
873 u8 queue, u8 msix_vector)
874 {
875 u32 ivar, index;
876 struct ixgbe_hw *hw = &adapter->hw;
877 switch (hw->mac.type) {
878 case ixgbe_mac_82598EB:
879 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
880 if (direction == -1)
881 direction = 0;
882 index = (((direction * 64) + queue) >> 2) & 0x1F;
883 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
884 ivar &= ~(0xFF << (8 * (queue & 0x3)));
885 ivar |= (msix_vector << (8 * (queue & 0x3)));
886 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
887 break;
888 case ixgbe_mac_82599EB:
889 case ixgbe_mac_X540:
890 case ixgbe_mac_X550:
891 case ixgbe_mac_X550EM_x:
892 case ixgbe_mac_x550em_a:
893 if (direction == -1) {
894 /* other causes */
895 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
896 index = ((queue & 1) * 8);
897 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
898 ivar &= ~(0xFF << index);
899 ivar |= (msix_vector << index);
900 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
901 break;
902 } else {
903 /* tx or rx causes */
904 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
905 index = ((16 * (queue & 1)) + (8 * direction));
906 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
907 ivar &= ~(0xFF << index);
908 ivar |= (msix_vector << index);
909 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
910 break;
911 }
912 default:
913 break;
914 }
915 }
916
917 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
918 u64 qmask)
919 {
920 u32 mask;
921
922 switch (adapter->hw.mac.type) {
923 case ixgbe_mac_82598EB:
924 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
925 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
926 break;
927 case ixgbe_mac_82599EB:
928 case ixgbe_mac_X540:
929 case ixgbe_mac_X550:
930 case ixgbe_mac_X550EM_x:
931 case ixgbe_mac_x550em_a:
932 mask = (qmask & 0xFFFFFFFF);
933 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
934 mask = (qmask >> 32);
935 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
936 break;
937 default:
938 break;
939 }
940 }
941
942 void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *ring,
943 struct ixgbe_tx_buffer *tx_buffer)
944 {
945 if (tx_buffer->skb) {
946 dev_kfree_skb_any(tx_buffer->skb);
947 if (dma_unmap_len(tx_buffer, len))
948 dma_unmap_single(ring->dev,
949 dma_unmap_addr(tx_buffer, dma),
950 dma_unmap_len(tx_buffer, len),
951 DMA_TO_DEVICE);
952 } else if (dma_unmap_len(tx_buffer, len)) {
953 dma_unmap_page(ring->dev,
954 dma_unmap_addr(tx_buffer, dma),
955 dma_unmap_len(tx_buffer, len),
956 DMA_TO_DEVICE);
957 }
958 tx_buffer->next_to_watch = NULL;
959 tx_buffer->skb = NULL;
960 dma_unmap_len_set(tx_buffer, len, 0);
961 /* tx_buffer must be completely set up in the transmit path */
962 }
963
964 static void ixgbe_update_xoff_rx_lfc(struct ixgbe_adapter *adapter)
965 {
966 struct ixgbe_hw *hw = &adapter->hw;
967 struct ixgbe_hw_stats *hwstats = &adapter->stats;
968 int i;
969 u32 data;
970
971 if ((hw->fc.current_mode != ixgbe_fc_full) &&
972 (hw->fc.current_mode != ixgbe_fc_rx_pause))
973 return;
974
975 switch (hw->mac.type) {
976 case ixgbe_mac_82598EB:
977 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
978 break;
979 default:
980 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
981 }
982 hwstats->lxoffrxc += data;
983
984 /* refill credits (no tx hang) if we received xoff */
985 if (!data)
986 return;
987
988 for (i = 0; i < adapter->num_tx_queues; i++)
989 clear_bit(__IXGBE_HANG_CHECK_ARMED,
990 &adapter->tx_ring[i]->state);
991 }
992
993 static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter)
994 {
995 struct ixgbe_hw *hw = &adapter->hw;
996 struct ixgbe_hw_stats *hwstats = &adapter->stats;
997 u32 xoff[8] = {0};
998 u8 tc;
999 int i;
1000 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
1001
1002 if (adapter->ixgbe_ieee_pfc)
1003 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
1004
1005 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED) || !pfc_en) {
1006 ixgbe_update_xoff_rx_lfc(adapter);
1007 return;
1008 }
1009
1010 /* update stats for each tc, only valid with PFC enabled */
1011 for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) {
1012 u32 pxoffrxc;
1013
1014 switch (hw->mac.type) {
1015 case ixgbe_mac_82598EB:
1016 pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
1017 break;
1018 default:
1019 pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
1020 }
1021 hwstats->pxoffrxc[i] += pxoffrxc;
1022 /* Get the TC for given UP */
1023 tc = netdev_get_prio_tc_map(adapter->netdev, i);
1024 xoff[tc] += pxoffrxc;
1025 }
1026
1027 /* disarm tx queues that have received xoff frames */
1028 for (i = 0; i < adapter->num_tx_queues; i++) {
1029 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
1030
1031 tc = tx_ring->dcb_tc;
1032 if (xoff[tc])
1033 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
1034 }
1035 }
1036
1037 static u64 ixgbe_get_tx_completed(struct ixgbe_ring *ring)
1038 {
1039 return ring->stats.packets;
1040 }
1041
1042 static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring)
1043 {
1044 struct ixgbe_adapter *adapter;
1045 struct ixgbe_hw *hw;
1046 u32 head, tail;
1047
1048 if (ring->l2_accel_priv)
1049 adapter = ring->l2_accel_priv->real_adapter;
1050 else
1051 adapter = netdev_priv(ring->netdev);
1052
1053 hw = &adapter->hw;
1054 head = IXGBE_READ_REG(hw, IXGBE_TDH(ring->reg_idx));
1055 tail = IXGBE_READ_REG(hw, IXGBE_TDT(ring->reg_idx));
1056
1057 if (head != tail)
1058 return (head < tail) ?
1059 tail - head : (tail + ring->count - head);
1060
1061 return 0;
1062 }
1063
1064 static inline bool ixgbe_check_tx_hang(struct ixgbe_ring *tx_ring)
1065 {
1066 u32 tx_done = ixgbe_get_tx_completed(tx_ring);
1067 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
1068 u32 tx_pending = ixgbe_get_tx_pending(tx_ring);
1069
1070 clear_check_for_tx_hang(tx_ring);
1071
1072 /*
1073 * Check for a hung queue, but be thorough. This verifies
1074 * that a transmit has been completed since the previous
1075 * check AND there is at least one packet pending. The
1076 * ARMED bit is set to indicate a potential hang. The
1077 * bit is cleared if a pause frame is received to remove
1078 * false hang detection due to PFC or 802.3x frames. By
1079 * requiring this to fail twice we avoid races with
1080 * pfc clearing the ARMED bit and conditions where we
1081 * run the check_tx_hang logic with a transmit completion
1082 * pending but without time to complete it yet.
1083 */
1084 if (tx_done_old == tx_done && tx_pending)
1085 /* make sure it is true for two checks in a row */
1086 return test_and_set_bit(__IXGBE_HANG_CHECK_ARMED,
1087 &tx_ring->state);
1088 /* update completed stats and continue */
1089 tx_ring->tx_stats.tx_done_old = tx_done;
1090 /* reset the countdown */
1091 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
1092
1093 return false;
1094 }
1095
1096 /**
1097 * ixgbe_tx_timeout_reset - initiate reset due to Tx timeout
1098 * @adapter: driver private struct
1099 **/
1100 static void ixgbe_tx_timeout_reset(struct ixgbe_adapter *adapter)
1101 {
1102
1103 /* Do the reset outside of interrupt context */
1104 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1105 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
1106 e_warn(drv, "initiating reset due to tx timeout\n");
1107 ixgbe_service_event_schedule(adapter);
1108 }
1109 }
1110
1111 /**
1112 * ixgbe_tx_maxrate - callback to set the maximum per-queue bitrate
1113 **/
1114 static int ixgbe_tx_maxrate(struct net_device *netdev,
1115 int queue_index, u32 maxrate)
1116 {
1117 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1118 struct ixgbe_hw *hw = &adapter->hw;
1119 u32 bcnrc_val = ixgbe_link_mbps(adapter);
1120
1121 if (!maxrate)
1122 return 0;
1123
1124 /* Calculate the rate factor values to set */
1125 bcnrc_val <<= IXGBE_RTTBCNRC_RF_INT_SHIFT;
1126 bcnrc_val /= maxrate;
1127
1128 /* clear everything but the rate factor */
1129 bcnrc_val &= IXGBE_RTTBCNRC_RF_INT_MASK |
1130 IXGBE_RTTBCNRC_RF_DEC_MASK;
1131
1132 /* enable the rate scheduler */
1133 bcnrc_val |= IXGBE_RTTBCNRC_RS_ENA;
1134
1135 IXGBE_WRITE_REG(hw, IXGBE_RTTDQSEL, queue_index);
1136 IXGBE_WRITE_REG(hw, IXGBE_RTTBCNRC, bcnrc_val);
1137
1138 return 0;
1139 }
1140
1141 /**
1142 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
1143 * @q_vector: structure containing interrupt and ring information
1144 * @tx_ring: tx ring to clean
1145 * @napi_budget: Used to determine if we are in netpoll
1146 **/
1147 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
1148 struct ixgbe_ring *tx_ring, int napi_budget)
1149 {
1150 struct ixgbe_adapter *adapter = q_vector->adapter;
1151 struct ixgbe_tx_buffer *tx_buffer;
1152 union ixgbe_adv_tx_desc *tx_desc;
1153 unsigned int total_bytes = 0, total_packets = 0;
1154 unsigned int budget = q_vector->tx.work_limit;
1155 unsigned int i = tx_ring->next_to_clean;
1156
1157 if (test_bit(__IXGBE_DOWN, &adapter->state))
1158 return true;
1159
1160 tx_buffer = &tx_ring->tx_buffer_info[i];
1161 tx_desc = IXGBE_TX_DESC(tx_ring, i);
1162 i -= tx_ring->count;
1163
1164 do {
1165 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
1166
1167 /* if next_to_watch is not set then there is no work pending */
1168 if (!eop_desc)
1169 break;
1170
1171 /* prevent any other reads prior to eop_desc */
1172 read_barrier_depends();
1173
1174 /* if DD is not set pending work has not been completed */
1175 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
1176 break;
1177
1178 /* clear next_to_watch to prevent false hangs */
1179 tx_buffer->next_to_watch = NULL;
1180
1181 /* update the statistics for this packet */
1182 total_bytes += tx_buffer->bytecount;
1183 total_packets += tx_buffer->gso_segs;
1184
1185 /* free the skb */
1186 napi_consume_skb(tx_buffer->skb, napi_budget);
1187
1188 /* unmap skb header data */
1189 dma_unmap_single(tx_ring->dev,
1190 dma_unmap_addr(tx_buffer, dma),
1191 dma_unmap_len(tx_buffer, len),
1192 DMA_TO_DEVICE);
1193
1194 /* clear tx_buffer data */
1195 tx_buffer->skb = NULL;
1196 dma_unmap_len_set(tx_buffer, len, 0);
1197
1198 /* unmap remaining buffers */
1199 while (tx_desc != eop_desc) {
1200 tx_buffer++;
1201 tx_desc++;
1202 i++;
1203 if (unlikely(!i)) {
1204 i -= tx_ring->count;
1205 tx_buffer = tx_ring->tx_buffer_info;
1206 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
1207 }
1208
1209 /* unmap any remaining paged data */
1210 if (dma_unmap_len(tx_buffer, len)) {
1211 dma_unmap_page(tx_ring->dev,
1212 dma_unmap_addr(tx_buffer, dma),
1213 dma_unmap_len(tx_buffer, len),
1214 DMA_TO_DEVICE);
1215 dma_unmap_len_set(tx_buffer, len, 0);
1216 }
1217 }
1218
1219 /* move us one more past the eop_desc for start of next pkt */
1220 tx_buffer++;
1221 tx_desc++;
1222 i++;
1223 if (unlikely(!i)) {
1224 i -= tx_ring->count;
1225 tx_buffer = tx_ring->tx_buffer_info;
1226 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
1227 }
1228
1229 /* issue prefetch for next Tx descriptor */
1230 prefetch(tx_desc);
1231
1232 /* update budget accounting */
1233 budget--;
1234 } while (likely(budget));
1235
1236 i += tx_ring->count;
1237 tx_ring->next_to_clean = i;
1238 u64_stats_update_begin(&tx_ring->syncp);
1239 tx_ring->stats.bytes += total_bytes;
1240 tx_ring->stats.packets += total_packets;
1241 u64_stats_update_end(&tx_ring->syncp);
1242 q_vector->tx.total_bytes += total_bytes;
1243 q_vector->tx.total_packets += total_packets;
1244
1245 if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring)) {
1246 /* schedule immediate reset if we believe we hung */
1247 struct ixgbe_hw *hw = &adapter->hw;
1248 e_err(drv, "Detected Tx Unit Hang\n"
1249 " Tx Queue <%d>\n"
1250 " TDH, TDT <%x>, <%x>\n"
1251 " next_to_use <%x>\n"
1252 " next_to_clean <%x>\n"
1253 "tx_buffer_info[next_to_clean]\n"
1254 " time_stamp <%lx>\n"
1255 " jiffies <%lx>\n",
1256 tx_ring->queue_index,
1257 IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)),
1258 IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)),
1259 tx_ring->next_to_use, i,
1260 tx_ring->tx_buffer_info[i].time_stamp, jiffies);
1261
1262 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
1263
1264 e_info(probe,
1265 "tx hang %d detected on queue %d, resetting adapter\n",
1266 adapter->tx_timeout_count + 1, tx_ring->queue_index);
1267
1268 /* schedule immediate reset if we believe we hung */
1269 ixgbe_tx_timeout_reset(adapter);
1270
1271 /* the adapter is about to reset, no point in enabling stuff */
1272 return true;
1273 }
1274
1275 netdev_tx_completed_queue(txring_txq(tx_ring),
1276 total_packets, total_bytes);
1277
1278 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
1279 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
1280 (ixgbe_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
1281 /* Make sure that anybody stopping the queue after this
1282 * sees the new next_to_clean.
1283 */
1284 smp_mb();
1285 if (__netif_subqueue_stopped(tx_ring->netdev,
1286 tx_ring->queue_index)
1287 && !test_bit(__IXGBE_DOWN, &adapter->state)) {
1288 netif_wake_subqueue(tx_ring->netdev,
1289 tx_ring->queue_index);
1290 ++tx_ring->tx_stats.restart_queue;
1291 }
1292 }
1293
1294 return !!budget;
1295 }
1296
1297 #ifdef CONFIG_IXGBE_DCA
1298 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
1299 struct ixgbe_ring *tx_ring,
1300 int cpu)
1301 {
1302 struct ixgbe_hw *hw = &adapter->hw;
1303 u32 txctrl = 0;
1304 u16 reg_offset;
1305
1306 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1307 txctrl = dca3_get_tag(tx_ring->dev, cpu);
1308
1309 switch (hw->mac.type) {
1310 case ixgbe_mac_82598EB:
1311 reg_offset = IXGBE_DCA_TXCTRL(tx_ring->reg_idx);
1312 break;
1313 case ixgbe_mac_82599EB:
1314 case ixgbe_mac_X540:
1315 reg_offset = IXGBE_DCA_TXCTRL_82599(tx_ring->reg_idx);
1316 txctrl <<= IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599;
1317 break;
1318 default:
1319 /* for unknown hardware do not write register */
1320 return;
1321 }
1322
1323 /*
1324 * We can enable relaxed ordering for reads, but not writes when
1325 * DCA is enabled. This is due to a known issue in some chipsets
1326 * which will cause the DCA tag to be cleared.
1327 */
1328 txctrl |= IXGBE_DCA_TXCTRL_DESC_RRO_EN |
1329 IXGBE_DCA_TXCTRL_DATA_RRO_EN |
1330 IXGBE_DCA_TXCTRL_DESC_DCA_EN;
1331
1332 IXGBE_WRITE_REG(hw, reg_offset, txctrl);
1333 }
1334
1335 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
1336 struct ixgbe_ring *rx_ring,
1337 int cpu)
1338 {
1339 struct ixgbe_hw *hw = &adapter->hw;
1340 u32 rxctrl = 0;
1341 u8 reg_idx = rx_ring->reg_idx;
1342
1343 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1344 rxctrl = dca3_get_tag(rx_ring->dev, cpu);
1345
1346 switch (hw->mac.type) {
1347 case ixgbe_mac_82599EB:
1348 case ixgbe_mac_X540:
1349 rxctrl <<= IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599;
1350 break;
1351 default:
1352 break;
1353 }
1354
1355 /*
1356 * We can enable relaxed ordering for reads, but not writes when
1357 * DCA is enabled. This is due to a known issue in some chipsets
1358 * which will cause the DCA tag to be cleared.
1359 */
1360 rxctrl |= IXGBE_DCA_RXCTRL_DESC_RRO_EN |
1361 IXGBE_DCA_RXCTRL_DATA_DCA_EN |
1362 IXGBE_DCA_RXCTRL_DESC_DCA_EN;
1363
1364 IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl);
1365 }
1366
1367 static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
1368 {
1369 struct ixgbe_adapter *adapter = q_vector->adapter;
1370 struct ixgbe_ring *ring;
1371 int cpu = get_cpu();
1372
1373 if (q_vector->cpu == cpu)
1374 goto out_no_update;
1375
1376 ixgbe_for_each_ring(ring, q_vector->tx)
1377 ixgbe_update_tx_dca(adapter, ring, cpu);
1378
1379 ixgbe_for_each_ring(ring, q_vector->rx)
1380 ixgbe_update_rx_dca(adapter, ring, cpu);
1381
1382 q_vector->cpu = cpu;
1383 out_no_update:
1384 put_cpu();
1385 }
1386
1387 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
1388 {
1389 int i;
1390
1391 /* always use CB2 mode, difference is masked in the CB driver */
1392 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1393 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
1394 IXGBE_DCA_CTRL_DCA_MODE_CB2);
1395 else
1396 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
1397 IXGBE_DCA_CTRL_DCA_DISABLE);
1398
1399 for (i = 0; i < adapter->num_q_vectors; i++) {
1400 adapter->q_vector[i]->cpu = -1;
1401 ixgbe_update_dca(adapter->q_vector[i]);
1402 }
1403 }
1404
1405 static int __ixgbe_notify_dca(struct device *dev, void *data)
1406 {
1407 struct ixgbe_adapter *adapter = dev_get_drvdata(dev);
1408 unsigned long event = *(unsigned long *)data;
1409
1410 if (!(adapter->flags & IXGBE_FLAG_DCA_CAPABLE))
1411 return 0;
1412
1413 switch (event) {
1414 case DCA_PROVIDER_ADD:
1415 /* if we're already enabled, don't do it again */
1416 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1417 break;
1418 if (dca_add_requester(dev) == 0) {
1419 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
1420 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
1421 IXGBE_DCA_CTRL_DCA_MODE_CB2);
1422 break;
1423 }
1424 /* Fall Through since DCA is disabled. */
1425 case DCA_PROVIDER_REMOVE:
1426 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
1427 dca_remove_requester(dev);
1428 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
1429 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
1430 IXGBE_DCA_CTRL_DCA_DISABLE);
1431 }
1432 break;
1433 }
1434
1435 return 0;
1436 }
1437
1438 #endif /* CONFIG_IXGBE_DCA */
1439
1440 #define IXGBE_RSS_L4_TYPES_MASK \
1441 ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
1442 (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
1443 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
1444 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))
1445
1446 static inline void ixgbe_rx_hash(struct ixgbe_ring *ring,
1447 union ixgbe_adv_rx_desc *rx_desc,
1448 struct sk_buff *skb)
1449 {
1450 u16 rss_type;
1451
1452 if (!(ring->netdev->features & NETIF_F_RXHASH))
1453 return;
1454
1455 rss_type = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info) &
1456 IXGBE_RXDADV_RSSTYPE_MASK;
1457
1458 if (!rss_type)
1459 return;
1460
1461 skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),
1462 (IXGBE_RSS_L4_TYPES_MASK & (1ul << rss_type)) ?
1463 PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
1464 }
1465
1466 #ifdef IXGBE_FCOE
1467 /**
1468 * ixgbe_rx_is_fcoe - check the rx desc for incoming pkt type
1469 * @ring: structure containing ring specific data
1470 * @rx_desc: advanced rx descriptor
1471 *
1472 * Returns : true if it is FCoE pkt
1473 */
1474 static inline bool ixgbe_rx_is_fcoe(struct ixgbe_ring *ring,
1475 union ixgbe_adv_rx_desc *rx_desc)
1476 {
1477 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1478
1479 return test_bit(__IXGBE_RX_FCOE, &ring->state) &&
1480 ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_ETQF_MASK)) ==
1481 (cpu_to_le16(IXGBE_ETQF_FILTER_FCOE <<
1482 IXGBE_RXDADV_PKTTYPE_ETQF_SHIFT)));
1483 }
1484
1485 #endif /* IXGBE_FCOE */
1486 /**
1487 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
1488 * @ring: structure containing ring specific data
1489 * @rx_desc: current Rx descriptor being processed
1490 * @skb: skb currently being received and modified
1491 **/
1492 static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
1493 union ixgbe_adv_rx_desc *rx_desc,
1494 struct sk_buff *skb)
1495 {
1496 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1497 __le16 hdr_info = rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
1498 bool encap_pkt = false;
1499
1500 skb_checksum_none_assert(skb);
1501
1502 /* Rx csum disabled */
1503 if (!(ring->netdev->features & NETIF_F_RXCSUM))
1504 return;
1505
1506 if ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_VXLAN)) &&
1507 (hdr_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_TUNNEL >> 16))) {
1508 encap_pkt = true;
1509 skb->encapsulation = 1;
1510 }
1511
1512 /* if IP and error */
1513 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
1514 ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
1515 ring->rx_stats.csum_err++;
1516 return;
1517 }
1518
1519 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
1520 return;
1521
1522 if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
1523 /*
1524 * 82599 errata, UDP frames with a 0 checksum can be marked as
1525 * checksum errors.
1526 */
1527 if ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_UDP)) &&
1528 test_bit(__IXGBE_RX_CSUM_UDP_ZERO_ERR, &ring->state))
1529 return;
1530
1531 ring->rx_stats.csum_err++;
1532 return;
1533 }
1534
1535 /* It must be a TCP or UDP packet with a valid checksum */
1536 skb->ip_summed = CHECKSUM_UNNECESSARY;
1537 if (encap_pkt) {
1538 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_OUTERIPCS))
1539 return;
1540
1541 if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_OUTERIPER)) {
1542 skb->ip_summed = CHECKSUM_NONE;
1543 return;
1544 }
1545 /* If we checked the outer header let the stack know */
1546 skb->csum_level = 1;
1547 }
1548 }
1549
1550 static bool ixgbe_alloc_mapped_page(struct ixgbe_ring *rx_ring,
1551 struct ixgbe_rx_buffer *bi)
1552 {
1553 struct page *page = bi->page;
1554 dma_addr_t dma;
1555
1556 /* since we are recycling buffers we should seldom need to alloc */
1557 if (likely(page))
1558 return true;
1559
1560 /* alloc new page for storage */
1561 page = dev_alloc_pages(ixgbe_rx_pg_order(rx_ring));
1562 if (unlikely(!page)) {
1563 rx_ring->rx_stats.alloc_rx_page_failed++;
1564 return false;
1565 }
1566
1567 /* map page for use */
1568 dma = dma_map_page(rx_ring->dev, page, 0,
1569 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
1570
1571 /*
1572 * if mapping failed free memory back to system since
1573 * there isn't much point in holding memory we can't use
1574 */
1575 if (dma_mapping_error(rx_ring->dev, dma)) {
1576 __free_pages(page, ixgbe_rx_pg_order(rx_ring));
1577
1578 rx_ring->rx_stats.alloc_rx_page_failed++;
1579 return false;
1580 }
1581
1582 bi->dma = dma;
1583 bi->page = page;
1584 bi->page_offset = 0;
1585
1586 return true;
1587 }
1588
1589 /**
1590 * ixgbe_alloc_rx_buffers - Replace used receive buffers
1591 * @rx_ring: ring to place buffers on
1592 * @cleaned_count: number of buffers to replace
1593 **/
1594 void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count)
1595 {
1596 union ixgbe_adv_rx_desc *rx_desc;
1597 struct ixgbe_rx_buffer *bi;
1598 u16 i = rx_ring->next_to_use;
1599
1600 /* nothing to do */
1601 if (!cleaned_count)
1602 return;
1603
1604 rx_desc = IXGBE_RX_DESC(rx_ring, i);
1605 bi = &rx_ring->rx_buffer_info[i];
1606 i -= rx_ring->count;
1607
1608 do {
1609 if (!ixgbe_alloc_mapped_page(rx_ring, bi))
1610 break;
1611
1612 /*
1613 * Refresh the desc even if buffer_addrs didn't change
1614 * because each write-back erases this info.
1615 */
1616 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
1617
1618 rx_desc++;
1619 bi++;
1620 i++;
1621 if (unlikely(!i)) {
1622 rx_desc = IXGBE_RX_DESC(rx_ring, 0);
1623 bi = rx_ring->rx_buffer_info;
1624 i -= rx_ring->count;
1625 }
1626
1627 /* clear the status bits for the next_to_use descriptor */
1628 rx_desc->wb.upper.status_error = 0;
1629
1630 cleaned_count--;
1631 } while (cleaned_count);
1632
1633 i += rx_ring->count;
1634
1635 if (rx_ring->next_to_use != i) {
1636 rx_ring->next_to_use = i;
1637
1638 /* update next to alloc since we have filled the ring */
1639 rx_ring->next_to_alloc = i;
1640
1641 /* Force memory writes to complete before letting h/w
1642 * know there are new descriptors to fetch. (Only
1643 * applicable for weak-ordered memory model archs,
1644 * such as IA-64).
1645 */
1646 wmb();
1647 writel(i, rx_ring->tail);
1648 }
1649 }
1650
1651 static void ixgbe_set_rsc_gso_size(struct ixgbe_ring *ring,
1652 struct sk_buff *skb)
1653 {
1654 u16 hdr_len = skb_headlen(skb);
1655
1656 /* set gso_size to avoid messing up TCP MSS */
1657 skb_shinfo(skb)->gso_size = DIV_ROUND_UP((skb->len - hdr_len),
1658 IXGBE_CB(skb)->append_cnt);
1659 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1660 }
1661
1662 static void ixgbe_update_rsc_stats(struct ixgbe_ring *rx_ring,
1663 struct sk_buff *skb)
1664 {
1665 /* if append_cnt is 0 then frame is not RSC */
1666 if (!IXGBE_CB(skb)->append_cnt)
1667 return;
1668
1669 rx_ring->rx_stats.rsc_count += IXGBE_CB(skb)->append_cnt;
1670 rx_ring->rx_stats.rsc_flush++;
1671
1672 ixgbe_set_rsc_gso_size(rx_ring, skb);
1673
1674 /* gso_size is computed using append_cnt so always clear it last */
1675 IXGBE_CB(skb)->append_cnt = 0;
1676 }
1677
1678 /**
1679 * ixgbe_process_skb_fields - Populate skb header fields from Rx descriptor
1680 * @rx_ring: rx descriptor ring packet is being transacted on
1681 * @rx_desc: pointer to the EOP Rx descriptor
1682 * @skb: pointer to current skb being populated
1683 *
1684 * This function checks the ring, descriptor, and packet information in
1685 * order to populate the hash, checksum, VLAN, timestamp, protocol, and
1686 * other fields within the skb.
1687 **/
1688 static void ixgbe_process_skb_fields(struct ixgbe_ring *rx_ring,
1689 union ixgbe_adv_rx_desc *rx_desc,
1690 struct sk_buff *skb)
1691 {
1692 struct net_device *dev = rx_ring->netdev;
1693 u32 flags = rx_ring->q_vector->adapter->flags;
1694
1695 ixgbe_update_rsc_stats(rx_ring, skb);
1696
1697 ixgbe_rx_hash(rx_ring, rx_desc, skb);
1698
1699 ixgbe_rx_checksum(rx_ring, rx_desc, skb);
1700
1701 if (unlikely(flags & IXGBE_FLAG_RX_HWTSTAMP_ENABLED))
1702 ixgbe_ptp_rx_hwtstamp(rx_ring, rx_desc, skb);
1703
1704 if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
1705 ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
1706 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
1707 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1708 }
1709
1710 skb_record_rx_queue(skb, rx_ring->queue_index);
1711
1712 skb->protocol = eth_type_trans(skb, dev);
1713 }
1714
1715 static void ixgbe_rx_skb(struct ixgbe_q_vector *q_vector,
1716 struct sk_buff *skb)
1717 {
1718 skb_mark_napi_id(skb, &q_vector->napi);
1719 if (ixgbe_qv_busy_polling(q_vector))
1720 netif_receive_skb(skb);
1721 else
1722 napi_gro_receive(&q_vector->napi, skb);
1723 }
1724
1725 /**
1726 * ixgbe_is_non_eop - process handling of non-EOP buffers
1727 * @rx_ring: Rx ring being processed
1728 * @rx_desc: Rx descriptor for current buffer
1729 * @skb: Current socket buffer containing buffer in progress
1730 *
1731 * This function updates next to clean. If the buffer is an EOP buffer
1732 * this function exits returning false, otherwise it will place the
1733 * sk_buff in the next buffer to be chained and return true indicating
1734 * that this is in fact a non-EOP buffer.
1735 **/
1736 static bool ixgbe_is_non_eop(struct ixgbe_ring *rx_ring,
1737 union ixgbe_adv_rx_desc *rx_desc,
1738 struct sk_buff *skb)
1739 {
1740 u32 ntc = rx_ring->next_to_clean + 1;
1741
1742 /* fetch, update, and store next to clean */
1743 ntc = (ntc < rx_ring->count) ? ntc : 0;
1744 rx_ring->next_to_clean = ntc;
1745
1746 prefetch(IXGBE_RX_DESC(rx_ring, ntc));
1747
1748 /* update RSC append count if present */
1749 if (ring_is_rsc_enabled(rx_ring)) {
1750 __le32 rsc_enabled = rx_desc->wb.lower.lo_dword.data &
1751 cpu_to_le32(IXGBE_RXDADV_RSCCNT_MASK);
1752
1753 if (unlikely(rsc_enabled)) {
1754 u32 rsc_cnt = le32_to_cpu(rsc_enabled);
1755
1756 rsc_cnt >>= IXGBE_RXDADV_RSCCNT_SHIFT;
1757 IXGBE_CB(skb)->append_cnt += rsc_cnt - 1;
1758
1759 /* update ntc based on RSC value */
1760 ntc = le32_to_cpu(rx_desc->wb.upper.status_error);
1761 ntc &= IXGBE_RXDADV_NEXTP_MASK;
1762 ntc >>= IXGBE_RXDADV_NEXTP_SHIFT;
1763 }
1764 }
1765
1766 /* if we are the last buffer then there is nothing else to do */
1767 if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
1768 return false;
1769
1770 /* place skb in next buffer to be received */
1771 rx_ring->rx_buffer_info[ntc].skb = skb;
1772 rx_ring->rx_stats.non_eop_descs++;
1773
1774 return true;
1775 }
1776
1777 /**
1778 * ixgbe_pull_tail - ixgbe specific version of skb_pull_tail
1779 * @rx_ring: rx descriptor ring packet is being transacted on
1780 * @skb: pointer to current skb being adjusted
1781 *
1782 * This function is an ixgbe specific version of __pskb_pull_tail. The
1783 * main difference between this version and the original function is that
1784 * this function can make several assumptions about the state of things
1785 * that allow for significant optimizations versus the standard function.
1786 * As a result we can do things like drop a frag and maintain an accurate
1787 * truesize for the skb.
1788 */
1789 static void ixgbe_pull_tail(struct ixgbe_ring *rx_ring,
1790 struct sk_buff *skb)
1791 {
1792 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
1793 unsigned char *va;
1794 unsigned int pull_len;
1795
1796 /*
1797 * it is valid to use page_address instead of kmap since we are
1798 * working with pages allocated out of the lomem pool per
1799 * alloc_page(GFP_ATOMIC)
1800 */
1801 va = skb_frag_address(frag);
1802
1803 /*
1804 * we need the header to contain the greater of either ETH_HLEN or
1805 * 60 bytes if the skb->len is less than 60 for skb_pad.
1806 */
1807 pull_len = eth_get_headlen(va, IXGBE_RX_HDR_SIZE);
1808
1809 /* align pull length to size of long to optimize memcpy performance */
1810 skb_copy_to_linear_data(skb, va, ALIGN(pull_len, sizeof(long)));
1811
1812 /* update all of the pointers */
1813 skb_frag_size_sub(frag, pull_len);
1814 frag->page_offset += pull_len;
1815 skb->data_len -= pull_len;
1816 skb->tail += pull_len;
1817 }
1818
1819 /**
1820 * ixgbe_dma_sync_frag - perform DMA sync for first frag of SKB
1821 * @rx_ring: rx descriptor ring packet is being transacted on
1822 * @skb: pointer to current skb being updated
1823 *
1824 * This function provides a basic DMA sync up for the first fragment of an
1825 * skb. The reason for doing this is that the first fragment cannot be
1826 * unmapped until we have reached the end of packet descriptor for a buffer
1827 * chain.
1828 */
1829 static void ixgbe_dma_sync_frag(struct ixgbe_ring *rx_ring,
1830 struct sk_buff *skb)
1831 {
1832 /* if the page was released unmap it, else just sync our portion */
1833 if (unlikely(IXGBE_CB(skb)->page_released)) {
1834 dma_unmap_page(rx_ring->dev, IXGBE_CB(skb)->dma,
1835 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
1836 IXGBE_CB(skb)->page_released = false;
1837 } else {
1838 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
1839
1840 dma_sync_single_range_for_cpu(rx_ring->dev,
1841 IXGBE_CB(skb)->dma,
1842 frag->page_offset,
1843 ixgbe_rx_bufsz(rx_ring),
1844 DMA_FROM_DEVICE);
1845 }
1846 IXGBE_CB(skb)->dma = 0;
1847 }
1848
1849 /**
1850 * ixgbe_cleanup_headers - Correct corrupted or empty headers
1851 * @rx_ring: rx descriptor ring packet is being transacted on
1852 * @rx_desc: pointer to the EOP Rx descriptor
1853 * @skb: pointer to current skb being fixed
1854 *
1855 * Check for corrupted packet headers caused by senders on the local L2
1856 * embedded NIC switch not setting up their Tx Descriptors right. These
1857 * should be very rare.
1858 *
1859 * Also address the case where we are pulling data in on pages only
1860 * and as such no data is present in the skb header.
1861 *
1862 * In addition if skb is not at least 60 bytes we need to pad it so that
1863 * it is large enough to qualify as a valid Ethernet frame.
1864 *
1865 * Returns true if an error was encountered and skb was freed.
1866 **/
1867 static bool ixgbe_cleanup_headers(struct ixgbe_ring *rx_ring,
1868 union ixgbe_adv_rx_desc *rx_desc,
1869 struct sk_buff *skb)
1870 {
1871 struct net_device *netdev = rx_ring->netdev;
1872
1873 /* verify that the packet does not have any known errors */
1874 if (unlikely(ixgbe_test_staterr(rx_desc,
1875 IXGBE_RXDADV_ERR_FRAME_ERR_MASK) &&
1876 !(netdev->features & NETIF_F_RXALL))) {
1877 dev_kfree_skb_any(skb);
1878 return true;
1879 }
1880
1881 /* place header in linear portion of buffer */
1882 if (skb_is_nonlinear(skb))
1883 ixgbe_pull_tail(rx_ring, skb);
1884
1885 #ifdef IXGBE_FCOE
1886 /* do not attempt to pad FCoE Frames as this will disrupt DDP */
1887 if (ixgbe_rx_is_fcoe(rx_ring, rx_desc))
1888 return false;
1889
1890 #endif
1891 /* if eth_skb_pad returns an error the skb was freed */
1892 if (eth_skb_pad(skb))
1893 return true;
1894
1895 return false;
1896 }
1897
1898 /**
1899 * ixgbe_reuse_rx_page - page flip buffer and store it back on the ring
1900 * @rx_ring: rx descriptor ring to store buffers on
1901 * @old_buff: donor buffer to have page reused
1902 *
1903 * Synchronizes page for reuse by the adapter
1904 **/
1905 static void ixgbe_reuse_rx_page(struct ixgbe_ring *rx_ring,
1906 struct ixgbe_rx_buffer *old_buff)
1907 {
1908 struct ixgbe_rx_buffer *new_buff;
1909 u16 nta = rx_ring->next_to_alloc;
1910
1911 new_buff = &rx_ring->rx_buffer_info[nta];
1912
1913 /* update, and store next to alloc */
1914 nta++;
1915 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
1916
1917 /* transfer page from old buffer to new buffer */
1918 *new_buff = *old_buff;
1919
1920 /* sync the buffer for use by the device */
1921 dma_sync_single_range_for_device(rx_ring->dev, new_buff->dma,
1922 new_buff->page_offset,
1923 ixgbe_rx_bufsz(rx_ring),
1924 DMA_FROM_DEVICE);
1925 }
1926
1927 static inline bool ixgbe_page_is_reserved(struct page *page)
1928 {
1929 return (page_to_nid(page) != numa_mem_id()) || page_is_pfmemalloc(page);
1930 }
1931
1932 /**
1933 * ixgbe_add_rx_frag - Add contents of Rx buffer to sk_buff
1934 * @rx_ring: rx descriptor ring to transact packets on
1935 * @rx_buffer: buffer containing page to add
1936 * @rx_desc: descriptor containing length of buffer written by hardware
1937 * @skb: sk_buff to place the data into
1938 *
1939 * This function will add the data contained in rx_buffer->page to the skb.
1940 * This is done either through a direct copy if the data in the buffer is
1941 * less than the skb header size, otherwise it will just attach the page as
1942 * a frag to the skb.
1943 *
1944 * The function will then update the page offset if necessary and return
1945 * true if the buffer can be reused by the adapter.
1946 **/
1947 static bool ixgbe_add_rx_frag(struct ixgbe_ring *rx_ring,
1948 struct ixgbe_rx_buffer *rx_buffer,
1949 union ixgbe_adv_rx_desc *rx_desc,
1950 struct sk_buff *skb)
1951 {
1952 struct page *page = rx_buffer->page;
1953 unsigned int size = le16_to_cpu(rx_desc->wb.upper.length);
1954 #if (PAGE_SIZE < 8192)
1955 unsigned int truesize = ixgbe_rx_bufsz(rx_ring);
1956 #else
1957 unsigned int truesize = ALIGN(size, L1_CACHE_BYTES);
1958 unsigned int last_offset = ixgbe_rx_pg_size(rx_ring) -
1959 ixgbe_rx_bufsz(rx_ring);
1960 #endif
1961
1962 if ((size <= IXGBE_RX_HDR_SIZE) && !skb_is_nonlinear(skb)) {
1963 unsigned char *va = page_address(page) + rx_buffer->page_offset;
1964
1965 memcpy(__skb_put(skb, size), va, ALIGN(size, sizeof(long)));
1966
1967 /* page is not reserved, we can reuse buffer as-is */
1968 if (likely(!ixgbe_page_is_reserved(page)))
1969 return true;
1970
1971 /* this page cannot be reused so discard it */
1972 __free_pages(page, ixgbe_rx_pg_order(rx_ring));
1973 return false;
1974 }
1975
1976 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
1977 rx_buffer->page_offset, size, truesize);
1978
1979 /* avoid re-using remote pages */
1980 if (unlikely(ixgbe_page_is_reserved(page)))
1981 return false;
1982
1983 #if (PAGE_SIZE < 8192)
1984 /* if we are only owner of page we can reuse it */
1985 if (unlikely(page_count(page) != 1))
1986 return false;
1987
1988 /* flip page offset to other buffer */
1989 rx_buffer->page_offset ^= truesize;
1990 #else
1991 /* move offset up to the next cache line */
1992 rx_buffer->page_offset += truesize;
1993
1994 if (rx_buffer->page_offset > last_offset)
1995 return false;
1996 #endif
1997
1998 /* Even if we own the page, we are not allowed to use atomic_set()
1999 * This would break get_page_unless_zero() users.
2000 */
2001 page_ref_inc(page);
2002
2003 return true;
2004 }
2005
2006 static struct sk_buff *ixgbe_fetch_rx_buffer(struct ixgbe_ring *rx_ring,
2007 union ixgbe_adv_rx_desc *rx_desc)
2008 {
2009 struct ixgbe_rx_buffer *rx_buffer;
2010 struct sk_buff *skb;
2011 struct page *page;
2012
2013 rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
2014 page = rx_buffer->page;
2015 prefetchw(page);
2016
2017 skb = rx_buffer->skb;
2018
2019 if (likely(!skb)) {
2020 void *page_addr = page_address(page) +
2021 rx_buffer->page_offset;
2022
2023 /* prefetch first cache line of first page */
2024 prefetch(page_addr);
2025 #if L1_CACHE_BYTES < 128
2026 prefetch(page_addr + L1_CACHE_BYTES);
2027 #endif
2028
2029 /* allocate a skb to store the frags */
2030 skb = napi_alloc_skb(&rx_ring->q_vector->napi,
2031 IXGBE_RX_HDR_SIZE);
2032 if (unlikely(!skb)) {
2033 rx_ring->rx_stats.alloc_rx_buff_failed++;
2034 return NULL;
2035 }
2036
2037 /*
2038 * we will be copying header into skb->data in
2039 * pskb_may_pull so it is in our interest to prefetch
2040 * it now to avoid a possible cache miss
2041 */
2042 prefetchw(skb->data);
2043
2044 /*
2045 * Delay unmapping of the first packet. It carries the
2046 * header information, HW may still access the header
2047 * after the writeback. Only unmap it when EOP is
2048 * reached
2049 */
2050 if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
2051 goto dma_sync;
2052
2053 IXGBE_CB(skb)->dma = rx_buffer->dma;
2054 } else {
2055 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP))
2056 ixgbe_dma_sync_frag(rx_ring, skb);
2057
2058 dma_sync:
2059 /* we are reusing so sync this buffer for CPU use */
2060 dma_sync_single_range_for_cpu(rx_ring->dev,
2061 rx_buffer->dma,
2062 rx_buffer->page_offset,
2063 ixgbe_rx_bufsz(rx_ring),
2064 DMA_FROM_DEVICE);
2065
2066 rx_buffer->skb = NULL;
2067 }
2068
2069 /* pull page into skb */
2070 if (ixgbe_add_rx_frag(rx_ring, rx_buffer, rx_desc, skb)) {
2071 /* hand second half of page back to the ring */
2072 ixgbe_reuse_rx_page(rx_ring, rx_buffer);
2073 } else if (IXGBE_CB(skb)->dma == rx_buffer->dma) {
2074 /* the page has been released from the ring */
2075 IXGBE_CB(skb)->page_released = true;
2076 } else {
2077 /* we are not reusing the buffer so unmap it */
2078 dma_unmap_page(rx_ring->dev, rx_buffer->dma,
2079 ixgbe_rx_pg_size(rx_ring),
2080 DMA_FROM_DEVICE);
2081 }
2082
2083 /* clear contents of buffer_info */
2084 rx_buffer->page = NULL;
2085
2086 return skb;
2087 }
2088
2089 /**
2090 * ixgbe_clean_rx_irq - Clean completed descriptors from Rx ring - bounce buf
2091 * @q_vector: structure containing interrupt and ring information
2092 * @rx_ring: rx descriptor ring to transact packets on
2093 * @budget: Total limit on number of packets to process
2094 *
2095 * This function provides a "bounce buffer" approach to Rx interrupt
2096 * processing. The advantage to this is that on systems that have
2097 * expensive overhead for IOMMU access this provides a means of avoiding
2098 * it by maintaining the mapping of the page to the syste.
2099 *
2100 * Returns amount of work completed
2101 **/
2102 static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
2103 struct ixgbe_ring *rx_ring,
2104 const int budget)
2105 {
2106 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
2107 #ifdef IXGBE_FCOE
2108 struct ixgbe_adapter *adapter = q_vector->adapter;
2109 int ddp_bytes;
2110 unsigned int mss = 0;
2111 #endif /* IXGBE_FCOE */
2112 u16 cleaned_count = ixgbe_desc_unused(rx_ring);
2113
2114 while (likely(total_rx_packets < budget)) {
2115 union ixgbe_adv_rx_desc *rx_desc;
2116 struct sk_buff *skb;
2117
2118 /* return some buffers to hardware, one at a time is too slow */
2119 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
2120 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
2121 cleaned_count = 0;
2122 }
2123
2124 rx_desc = IXGBE_RX_DESC(rx_ring, rx_ring->next_to_clean);
2125
2126 if (!rx_desc->wb.upper.status_error)
2127 break;
2128
2129 /* This memory barrier is needed to keep us from reading
2130 * any other fields out of the rx_desc until we know the
2131 * descriptor has been written back
2132 */
2133 dma_rmb();
2134
2135 /* retrieve a buffer from the ring */
2136 skb = ixgbe_fetch_rx_buffer(rx_ring, rx_desc);
2137
2138 /* exit if we failed to retrieve a buffer */
2139 if (!skb)
2140 break;
2141
2142 cleaned_count++;
2143
2144 /* place incomplete frames back on ring for completion */
2145 if (ixgbe_is_non_eop(rx_ring, rx_desc, skb))
2146 continue;
2147
2148 /* verify the packet layout is correct */
2149 if (ixgbe_cleanup_headers(rx_ring, rx_desc, skb))
2150 continue;
2151
2152 /* probably a little skewed due to removing CRC */
2153 total_rx_bytes += skb->len;
2154
2155 /* populate checksum, timestamp, VLAN, and protocol */
2156 ixgbe_process_skb_fields(rx_ring, rx_desc, skb);
2157
2158 #ifdef IXGBE_FCOE
2159 /* if ddp, not passing to ULD unless for FCP_RSP or error */
2160 if (ixgbe_rx_is_fcoe(rx_ring, rx_desc)) {
2161 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
2162 /* include DDPed FCoE data */
2163 if (ddp_bytes > 0) {
2164 if (!mss) {
2165 mss = rx_ring->netdev->mtu -
2166 sizeof(struct fcoe_hdr) -
2167 sizeof(struct fc_frame_header) -
2168 sizeof(struct fcoe_crc_eof);
2169 if (mss > 512)
2170 mss &= ~511;
2171 }
2172 total_rx_bytes += ddp_bytes;
2173 total_rx_packets += DIV_ROUND_UP(ddp_bytes,
2174 mss);
2175 }
2176 if (!ddp_bytes) {
2177 dev_kfree_skb_any(skb);
2178 continue;
2179 }
2180 }
2181
2182 #endif /* IXGBE_FCOE */
2183 ixgbe_rx_skb(q_vector, skb);
2184
2185 /* update budget accounting */
2186 total_rx_packets++;
2187 }
2188
2189 u64_stats_update_begin(&rx_ring->syncp);
2190 rx_ring->stats.packets += total_rx_packets;
2191 rx_ring->stats.bytes += total_rx_bytes;
2192 u64_stats_update_end(&rx_ring->syncp);
2193 q_vector->rx.total_packets += total_rx_packets;
2194 q_vector->rx.total_bytes += total_rx_bytes;
2195
2196 return total_rx_packets;
2197 }
2198
2199 #ifdef CONFIG_NET_RX_BUSY_POLL
2200 /* must be called with local_bh_disable()d */
2201 static int ixgbe_low_latency_recv(struct napi_struct *napi)
2202 {
2203 struct ixgbe_q_vector *q_vector =
2204 container_of(napi, struct ixgbe_q_vector, napi);
2205 struct ixgbe_adapter *adapter = q_vector->adapter;
2206 struct ixgbe_ring *ring;
2207 int found = 0;
2208
2209 if (test_bit(__IXGBE_DOWN, &adapter->state))
2210 return LL_FLUSH_FAILED;
2211
2212 if (!ixgbe_qv_lock_poll(q_vector))
2213 return LL_FLUSH_BUSY;
2214
2215 ixgbe_for_each_ring(ring, q_vector->rx) {
2216 found = ixgbe_clean_rx_irq(q_vector, ring, 4);
2217 #ifdef BP_EXTENDED_STATS
2218 if (found)
2219 ring->stats.cleaned += found;
2220 else
2221 ring->stats.misses++;
2222 #endif
2223 if (found)
2224 break;
2225 }
2226
2227 ixgbe_qv_unlock_poll(q_vector);
2228
2229 return found;
2230 }
2231 #endif /* CONFIG_NET_RX_BUSY_POLL */
2232
2233 /**
2234 * ixgbe_configure_msix - Configure MSI-X hardware
2235 * @adapter: board private structure
2236 *
2237 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
2238 * interrupts.
2239 **/
2240 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
2241 {
2242 struct ixgbe_q_vector *q_vector;
2243 int v_idx;
2244 u32 mask;
2245
2246 /* Populate MSIX to EITR Select */
2247 if (adapter->num_vfs > 32) {
2248 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
2249 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
2250 }
2251
2252 /*
2253 * Populate the IVAR table and set the ITR values to the
2254 * corresponding register.
2255 */
2256 for (v_idx = 0; v_idx < adapter->num_q_vectors; v_idx++) {
2257 struct ixgbe_ring *ring;
2258 q_vector = adapter->q_vector[v_idx];
2259
2260 ixgbe_for_each_ring(ring, q_vector->rx)
2261 ixgbe_set_ivar(adapter, 0, ring->reg_idx, v_idx);
2262
2263 ixgbe_for_each_ring(ring, q_vector->tx)
2264 ixgbe_set_ivar(adapter, 1, ring->reg_idx, v_idx);
2265
2266 ixgbe_write_eitr(q_vector);
2267 }
2268
2269 switch (adapter->hw.mac.type) {
2270 case ixgbe_mac_82598EB:
2271 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
2272 v_idx);
2273 break;
2274 case ixgbe_mac_82599EB:
2275 case ixgbe_mac_X540:
2276 case ixgbe_mac_X550:
2277 case ixgbe_mac_X550EM_x:
2278 case ixgbe_mac_x550em_a:
2279 ixgbe_set_ivar(adapter, -1, 1, v_idx);
2280 break;
2281 default:
2282 break;
2283 }
2284 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
2285
2286 /* set up to autoclear timer, and the vectors */
2287 mask = IXGBE_EIMS_ENABLE_MASK;
2288 mask &= ~(IXGBE_EIMS_OTHER |
2289 IXGBE_EIMS_MAILBOX |
2290 IXGBE_EIMS_LSC);
2291
2292 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
2293 }
2294
2295 enum latency_range {
2296 lowest_latency = 0,
2297 low_latency = 1,
2298 bulk_latency = 2,
2299 latency_invalid = 255
2300 };
2301
2302 /**
2303 * ixgbe_update_itr - update the dynamic ITR value based on statistics
2304 * @q_vector: structure containing interrupt and ring information
2305 * @ring_container: structure containing ring performance data
2306 *
2307 * Stores a new ITR value based on packets and byte
2308 * counts during the last interrupt. The advantage of per interrupt
2309 * computation is faster updates and more accurate ITR for the current
2310 * traffic pattern. Constants in this function were computed
2311 * based on theoretical maximum wire speed and thresholds were set based
2312 * on testing data as well as attempting to minimize response time
2313 * while increasing bulk throughput.
2314 * this functionality is controlled by the InterruptThrottleRate module
2315 * parameter (see ixgbe_param.c)
2316 **/
2317 static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
2318 struct ixgbe_ring_container *ring_container)
2319 {
2320 int bytes = ring_container->total_bytes;
2321 int packets = ring_container->total_packets;
2322 u32 timepassed_us;
2323 u64 bytes_perint;
2324 u8 itr_setting = ring_container->itr;
2325
2326 if (packets == 0)
2327 return;
2328
2329 /* simple throttlerate management
2330 * 0-10MB/s lowest (100000 ints/s)
2331 * 10-20MB/s low (20000 ints/s)
2332 * 20-1249MB/s bulk (12000 ints/s)
2333 */
2334 /* what was last interrupt timeslice? */
2335 timepassed_us = q_vector->itr >> 2;
2336 if (timepassed_us == 0)
2337 return;
2338
2339 bytes_perint = bytes / timepassed_us; /* bytes/usec */
2340
2341 switch (itr_setting) {
2342 case lowest_latency:
2343 if (bytes_perint > 10)
2344 itr_setting = low_latency;
2345 break;
2346 case low_latency:
2347 if (bytes_perint > 20)
2348 itr_setting = bulk_latency;
2349 else if (bytes_perint <= 10)
2350 itr_setting = lowest_latency;
2351 break;
2352 case bulk_latency:
2353 if (bytes_perint <= 20)
2354 itr_setting = low_latency;
2355 break;
2356 }
2357
2358 /* clear work counters since we have the values we need */
2359 ring_container->total_bytes = 0;
2360 ring_container->total_packets = 0;
2361
2362 /* write updated itr to ring container */
2363 ring_container->itr = itr_setting;
2364 }
2365
2366 /**
2367 * ixgbe_write_eitr - write EITR register in hardware specific way
2368 * @q_vector: structure containing interrupt and ring information
2369 *
2370 * This function is made to be called by ethtool and by the driver
2371 * when it needs to update EITR registers at runtime. Hardware
2372 * specific quirks/differences are taken care of here.
2373 */
2374 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
2375 {
2376 struct ixgbe_adapter *adapter = q_vector->adapter;
2377 struct ixgbe_hw *hw = &adapter->hw;
2378 int v_idx = q_vector->v_idx;
2379 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
2380
2381 switch (adapter->hw.mac.type) {
2382 case ixgbe_mac_82598EB:
2383 /* must write high and low 16 bits to reset counter */
2384 itr_reg |= (itr_reg << 16);
2385 break;
2386 case ixgbe_mac_82599EB:
2387 case ixgbe_mac_X540:
2388 case ixgbe_mac_X550:
2389 case ixgbe_mac_X550EM_x:
2390 case ixgbe_mac_x550em_a:
2391 /*
2392 * set the WDIS bit to not clear the timer bits and cause an
2393 * immediate assertion of the interrupt
2394 */
2395 itr_reg |= IXGBE_EITR_CNT_WDIS;
2396 break;
2397 default:
2398 break;
2399 }
2400 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
2401 }
2402
2403 static void ixgbe_set_itr(struct ixgbe_q_vector *q_vector)
2404 {
2405 u32 new_itr = q_vector->itr;
2406 u8 current_itr;
2407
2408 ixgbe_update_itr(q_vector, &q_vector->tx);
2409 ixgbe_update_itr(q_vector, &q_vector->rx);
2410
2411 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
2412
2413 switch (current_itr) {
2414 /* counts and packets in update_itr are dependent on these numbers */
2415 case lowest_latency:
2416 new_itr = IXGBE_100K_ITR;
2417 break;
2418 case low_latency:
2419 new_itr = IXGBE_20K_ITR;
2420 break;
2421 case bulk_latency:
2422 new_itr = IXGBE_12K_ITR;
2423 break;
2424 default:
2425 break;
2426 }
2427
2428 if (new_itr != q_vector->itr) {
2429 /* do an exponential smoothing */
2430 new_itr = (10 * new_itr * q_vector->itr) /
2431 ((9 * new_itr) + q_vector->itr);
2432
2433 /* save the algorithm value here */
2434 q_vector->itr = new_itr;
2435
2436 ixgbe_write_eitr(q_vector);
2437 }
2438 }
2439
2440 /**
2441 * ixgbe_check_overtemp_subtask - check for over temperature
2442 * @adapter: pointer to adapter
2443 **/
2444 static void ixgbe_check_overtemp_subtask(struct ixgbe_adapter *adapter)
2445 {
2446 struct ixgbe_hw *hw = &adapter->hw;
2447 u32 eicr = adapter->interrupt_event;
2448
2449 if (test_bit(__IXGBE_DOWN, &adapter->state))
2450 return;
2451
2452 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
2453 !(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_EVENT))
2454 return;
2455
2456 adapter->flags2 &= ~IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2457
2458 switch (hw->device_id) {
2459 case IXGBE_DEV_ID_82599_T3_LOM:
2460 /*
2461 * Since the warning interrupt is for both ports
2462 * we don't have to check if:
2463 * - This interrupt wasn't for our port.
2464 * - We may have missed the interrupt so always have to
2465 * check if we got a LSC
2466 */
2467 if (!(eicr & IXGBE_EICR_GPI_SDP0_8259X) &&
2468 !(eicr & IXGBE_EICR_LSC))
2469 return;
2470
2471 if (!(eicr & IXGBE_EICR_LSC) && hw->mac.ops.check_link) {
2472 u32 speed;
2473 bool link_up = false;
2474
2475 hw->mac.ops.check_link(hw, &speed, &link_up, false);
2476
2477 if (link_up)
2478 return;
2479 }
2480
2481 /* Check if this is not due to overtemp */
2482 if (hw->phy.ops.check_overtemp(hw) != IXGBE_ERR_OVERTEMP)
2483 return;
2484
2485 break;
2486 default:
2487 if (adapter->hw.mac.type >= ixgbe_mac_X540)
2488 return;
2489 if (!(eicr & IXGBE_EICR_GPI_SDP0(hw)))
2490 return;
2491 break;
2492 }
2493 e_crit(drv, "%s\n", ixgbe_overheat_msg);
2494
2495 adapter->interrupt_event = 0;
2496 }
2497
2498 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
2499 {
2500 struct ixgbe_hw *hw = &adapter->hw;
2501
2502 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
2503 (eicr & IXGBE_EICR_GPI_SDP1(hw))) {
2504 e_crit(probe, "Fan has stopped, replace the adapter\n");
2505 /* write to clear the interrupt */
2506 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1(hw));
2507 }
2508 }
2509
2510 static void ixgbe_check_overtemp_event(struct ixgbe_adapter *adapter, u32 eicr)
2511 {
2512 struct ixgbe_hw *hw = &adapter->hw;
2513
2514 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE))
2515 return;
2516
2517 switch (adapter->hw.mac.type) {
2518 case ixgbe_mac_82599EB:
2519 /*
2520 * Need to check link state so complete overtemp check
2521 * on service task
2522 */
2523 if (((eicr & IXGBE_EICR_GPI_SDP0(hw)) ||
2524 (eicr & IXGBE_EICR_LSC)) &&
2525 (!test_bit(__IXGBE_DOWN, &adapter->state))) {
2526 adapter->interrupt_event = eicr;
2527 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2528 ixgbe_service_event_schedule(adapter);
2529 return;
2530 }
2531 return;
2532 case ixgbe_mac_X540:
2533 if (!(eicr & IXGBE_EICR_TS))
2534 return;
2535 break;
2536 default:
2537 return;
2538 }
2539
2540 e_crit(drv, "%s\n", ixgbe_overheat_msg);
2541 }
2542
2543 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
2544 {
2545 switch (hw->mac.type) {
2546 case ixgbe_mac_82598EB:
2547 if (hw->phy.type == ixgbe_phy_nl)
2548 return true;
2549 return false;
2550 case ixgbe_mac_82599EB:
2551 case ixgbe_mac_X550EM_x:
2552 case ixgbe_mac_x550em_a:
2553 switch (hw->mac.ops.get_media_type(hw)) {
2554 case ixgbe_media_type_fiber:
2555 case ixgbe_media_type_fiber_qsfp:
2556 return true;
2557 default:
2558 return false;
2559 }
2560 default:
2561 return false;
2562 }
2563 }
2564
2565 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
2566 {
2567 struct ixgbe_hw *hw = &adapter->hw;
2568 u32 eicr_mask = IXGBE_EICR_GPI_SDP2(hw);
2569
2570 if (!ixgbe_is_sfp(hw))
2571 return;
2572
2573 /* Later MAC's use different SDP */
2574 if (hw->mac.type >= ixgbe_mac_X540)
2575 eicr_mask = IXGBE_EICR_GPI_SDP0_X540;
2576
2577 if (eicr & eicr_mask) {
2578 /* Clear the interrupt */
2579 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr_mask);
2580 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2581 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
2582 adapter->sfp_poll_time = 0;
2583 ixgbe_service_event_schedule(adapter);
2584 }
2585 }
2586
2587 if (adapter->hw.mac.type == ixgbe_mac_82599EB &&
2588 (eicr & IXGBE_EICR_GPI_SDP1(hw))) {
2589 /* Clear the interrupt */
2590 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1(hw));
2591 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2592 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
2593 ixgbe_service_event_schedule(adapter);
2594 }
2595 }
2596 }
2597
2598 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
2599 {
2600 struct ixgbe_hw *hw = &adapter->hw;
2601
2602 adapter->lsc_int++;
2603 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2604 adapter->link_check_timeout = jiffies;
2605 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2606 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
2607 IXGBE_WRITE_FLUSH(hw);
2608 ixgbe_service_event_schedule(adapter);
2609 }
2610 }
2611
2612 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
2613 u64 qmask)
2614 {
2615 u32 mask;
2616 struct ixgbe_hw *hw = &adapter->hw;
2617
2618 switch (hw->mac.type) {
2619 case ixgbe_mac_82598EB:
2620 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
2621 IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
2622 break;
2623 case ixgbe_mac_82599EB:
2624 case ixgbe_mac_X540:
2625 case ixgbe_mac_X550:
2626 case ixgbe_mac_X550EM_x:
2627 case ixgbe_mac_x550em_a:
2628 mask = (qmask & 0xFFFFFFFF);
2629 if (mask)
2630 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
2631 mask = (qmask >> 32);
2632 if (mask)
2633 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
2634 break;
2635 default:
2636 break;
2637 }
2638 /* skip the flush */
2639 }
2640
2641 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
2642 u64 qmask)
2643 {
2644 u32 mask;
2645 struct ixgbe_hw *hw = &adapter->hw;
2646
2647 switch (hw->mac.type) {
2648 case ixgbe_mac_82598EB:
2649 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
2650 IXGBE_WRITE_REG(hw, IXGBE_EIMC, mask);
2651 break;
2652 case ixgbe_mac_82599EB:
2653 case ixgbe_mac_X540:
2654 case ixgbe_mac_X550:
2655 case ixgbe_mac_X550EM_x:
2656 case ixgbe_mac_x550em_a:
2657 mask = (qmask & 0xFFFFFFFF);
2658 if (mask)
2659 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(0), mask);
2660 mask = (qmask >> 32);
2661 if (mask)
2662 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(1), mask);
2663 break;
2664 default:
2665 break;
2666 }
2667 /* skip the flush */
2668 }
2669
2670 /**
2671 * ixgbe_irq_enable - Enable default interrupt generation settings
2672 * @adapter: board private structure
2673 **/
2674 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
2675 bool flush)
2676 {
2677 struct ixgbe_hw *hw = &adapter->hw;
2678 u32 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
2679
2680 /* don't reenable LSC while waiting for link */
2681 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
2682 mask &= ~IXGBE_EIMS_LSC;
2683
2684 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
2685 switch (adapter->hw.mac.type) {
2686 case ixgbe_mac_82599EB:
2687 mask |= IXGBE_EIMS_GPI_SDP0(hw);
2688 break;
2689 case ixgbe_mac_X540:
2690 case ixgbe_mac_X550:
2691 case ixgbe_mac_X550EM_x:
2692 case ixgbe_mac_x550em_a:
2693 mask |= IXGBE_EIMS_TS;
2694 break;
2695 default:
2696 break;
2697 }
2698 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
2699 mask |= IXGBE_EIMS_GPI_SDP1(hw);
2700 switch (adapter->hw.mac.type) {
2701 case ixgbe_mac_82599EB:
2702 mask |= IXGBE_EIMS_GPI_SDP1(hw);
2703 mask |= IXGBE_EIMS_GPI_SDP2(hw);
2704 /* fall through */
2705 case ixgbe_mac_X540:
2706 case ixgbe_mac_X550:
2707 case ixgbe_mac_X550EM_x:
2708 case ixgbe_mac_x550em_a:
2709 if (adapter->hw.device_id == IXGBE_DEV_ID_X550EM_X_SFP ||
2710 adapter->hw.device_id == IXGBE_DEV_ID_X550EM_A_SFP ||
2711 adapter->hw.device_id == IXGBE_DEV_ID_X550EM_A_SFP_N)
2712 mask |= IXGBE_EIMS_GPI_SDP0(&adapter->hw);
2713 if (adapter->hw.phy.type == ixgbe_phy_x550em_ext_t)
2714 mask |= IXGBE_EICR_GPI_SDP0_X540;
2715 mask |= IXGBE_EIMS_ECC;
2716 mask |= IXGBE_EIMS_MAILBOX;
2717 break;
2718 default:
2719 break;
2720 }
2721
2722 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
2723 !(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
2724 mask |= IXGBE_EIMS_FLOW_DIR;
2725
2726 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
2727 if (queues)
2728 ixgbe_irq_enable_queues(adapter, ~0);
2729 if (flush)
2730 IXGBE_WRITE_FLUSH(&adapter->hw);
2731 }
2732
2733 static irqreturn_t ixgbe_msix_other(int irq, void *data)
2734 {
2735 struct ixgbe_adapter *adapter = data;
2736 struct ixgbe_hw *hw = &adapter->hw;
2737 u32 eicr;
2738
2739 /*
2740 * Workaround for Silicon errata. Use clear-by-write instead
2741 * of clear-by-read. Reading with EICS will return the
2742 * interrupt causes without clearing, which later be done
2743 * with the write to EICR.
2744 */
2745 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
2746
2747 /* The lower 16bits of the EICR register are for the queue interrupts
2748 * which should be masked here in order to not accidentally clear them if
2749 * the bits are high when ixgbe_msix_other is called. There is a race
2750 * condition otherwise which results in possible performance loss
2751 * especially if the ixgbe_msix_other interrupt is triggering
2752 * consistently (as it would when PPS is turned on for the X540 device)
2753 */
2754 eicr &= 0xFFFF0000;
2755
2756 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
2757
2758 if (eicr & IXGBE_EICR_LSC)
2759 ixgbe_check_lsc(adapter);
2760
2761 if (eicr & IXGBE_EICR_MAILBOX)
2762 ixgbe_msg_task(adapter);
2763
2764 switch (hw->mac.type) {
2765 case ixgbe_mac_82599EB:
2766 case ixgbe_mac_X540:
2767 case ixgbe_mac_X550:
2768 case ixgbe_mac_X550EM_x:
2769 case ixgbe_mac_x550em_a:
2770 if (hw->phy.type == ixgbe_phy_x550em_ext_t &&
2771 (eicr & IXGBE_EICR_GPI_SDP0_X540)) {
2772 adapter->flags2 |= IXGBE_FLAG2_PHY_INTERRUPT;
2773 ixgbe_service_event_schedule(adapter);
2774 IXGBE_WRITE_REG(hw, IXGBE_EICR,
2775 IXGBE_EICR_GPI_SDP0_X540);
2776 }
2777 if (eicr & IXGBE_EICR_ECC) {
2778 e_info(link, "Received ECC Err, initiating reset\n");
2779 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
2780 ixgbe_service_event_schedule(adapter);
2781 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_ECC);
2782 }
2783 /* Handle Flow Director Full threshold interrupt */
2784 if (eicr & IXGBE_EICR_FLOW_DIR) {
2785 int reinit_count = 0;
2786 int i;
2787 for (i = 0; i < adapter->num_tx_queues; i++) {
2788 struct ixgbe_ring *ring = adapter->tx_ring[i];
2789 if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE,
2790 &ring->state))
2791 reinit_count++;
2792 }
2793 if (reinit_count) {
2794 /* no more flow director interrupts until after init */
2795 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_FLOW_DIR);
2796 adapter->flags2 |= IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
2797 ixgbe_service_event_schedule(adapter);
2798 }
2799 }
2800 ixgbe_check_sfp_event(adapter, eicr);
2801 ixgbe_check_overtemp_event(adapter, eicr);
2802 break;
2803 default:
2804 break;
2805 }
2806
2807 ixgbe_check_fan_failure(adapter, eicr);
2808
2809 if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
2810 ixgbe_ptp_check_pps_event(adapter);
2811
2812 /* re-enable the original interrupt state, no lsc, no queues */
2813 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2814 ixgbe_irq_enable(adapter, false, false);
2815
2816 return IRQ_HANDLED;
2817 }
2818
2819 static irqreturn_t ixgbe_msix_clean_rings(int irq, void *data)
2820 {
2821 struct ixgbe_q_vector *q_vector = data;
2822
2823 /* EIAM disabled interrupts (on this vector) for us */
2824
2825 if (q_vector->rx.ring || q_vector->tx.ring)
2826 napi_schedule_irqoff(&q_vector->napi);
2827
2828 return IRQ_HANDLED;
2829 }
2830
2831 /**
2832 * ixgbe_poll - NAPI Rx polling callback
2833 * @napi: structure for representing this polling device
2834 * @budget: how many packets driver is allowed to clean
2835 *
2836 * This function is used for legacy and MSI, NAPI mode
2837 **/
2838 int ixgbe_poll(struct napi_struct *napi, int budget)
2839 {
2840 struct ixgbe_q_vector *q_vector =
2841 container_of(napi, struct ixgbe_q_vector, napi);
2842 struct ixgbe_adapter *adapter = q_vector->adapter;
2843 struct ixgbe_ring *ring;
2844 int per_ring_budget, work_done = 0;
2845 bool clean_complete = true;
2846
2847 #ifdef CONFIG_IXGBE_DCA
2848 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2849 ixgbe_update_dca(q_vector);
2850 #endif
2851
2852 ixgbe_for_each_ring(ring, q_vector->tx) {
2853 if (!ixgbe_clean_tx_irq(q_vector, ring, budget))
2854 clean_complete = false;
2855 }
2856
2857 /* Exit if we are called by netpoll or busy polling is active */
2858 if ((budget <= 0) || !ixgbe_qv_lock_napi(q_vector))
2859 return budget;
2860
2861 /* attempt to distribute budget to each queue fairly, but don't allow
2862 * the budget to go below 1 because we'll exit polling */
2863 if (q_vector->rx.count > 1)
2864 per_ring_budget = max(budget/q_vector->rx.count, 1);
2865 else
2866 per_ring_budget = budget;
2867
2868 ixgbe_for_each_ring(ring, q_vector->rx) {
2869 int cleaned = ixgbe_clean_rx_irq(q_vector, ring,
2870 per_ring_budget);
2871
2872 work_done += cleaned;
2873 if (cleaned >= per_ring_budget)
2874 clean_complete = false;
2875 }
2876
2877 ixgbe_qv_unlock_napi(q_vector);
2878 /* If all work not completed, return budget and keep polling */
2879 if (!clean_complete)
2880 return budget;
2881
2882 /* all work done, exit the polling mode */
2883 napi_complete_done(napi, work_done);
2884 if (adapter->rx_itr_setting & 1)
2885 ixgbe_set_itr(q_vector);
2886 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2887 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
2888
2889 return 0;
2890 }
2891
2892 /**
2893 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2894 * @adapter: board private structure
2895 *
2896 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2897 * interrupts from the kernel.
2898 **/
2899 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2900 {
2901 struct net_device *netdev = adapter->netdev;
2902 int vector, err;
2903 int ri = 0, ti = 0;
2904
2905 for (vector = 0; vector < adapter->num_q_vectors; vector++) {
2906 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
2907 struct msix_entry *entry = &adapter->msix_entries[vector];
2908
2909 if (q_vector->tx.ring && q_vector->rx.ring) {
2910 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2911 "%s-%s-%d", netdev->name, "TxRx", ri++);
2912 ti++;
2913 } else if (q_vector->rx.ring) {
2914 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2915 "%s-%s-%d", netdev->name, "rx", ri++);
2916 } else if (q_vector->tx.ring) {
2917 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2918 "%s-%s-%d", netdev->name, "tx", ti++);
2919 } else {
2920 /* skip this unused q_vector */
2921 continue;
2922 }
2923 err = request_irq(entry->vector, &ixgbe_msix_clean_rings, 0,
2924 q_vector->name, q_vector);
2925 if (err) {
2926 e_err(probe, "request_irq failed for MSIX interrupt "
2927 "Error: %d\n", err);
2928 goto free_queue_irqs;
2929 }
2930 /* If Flow Director is enabled, set interrupt affinity */
2931 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2932 /* assign the mask for this irq */
2933 irq_set_affinity_hint(entry->vector,
2934 &q_vector->affinity_mask);
2935 }
2936 }
2937
2938 err = request_irq(adapter->msix_entries[vector].vector,
2939 ixgbe_msix_other, 0, netdev->name, adapter);
2940 if (err) {
2941 e_err(probe, "request_irq for msix_other failed: %d\n", err);
2942 goto free_queue_irqs;
2943 }
2944
2945 return 0;
2946
2947 free_queue_irqs:
2948 while (vector) {
2949 vector--;
2950 irq_set_affinity_hint(adapter->msix_entries[vector].vector,
2951 NULL);
2952 free_irq(adapter->msix_entries[vector].vector,
2953 adapter->q_vector[vector]);
2954 }
2955 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2956 pci_disable_msix(adapter->pdev);
2957 kfree(adapter->msix_entries);
2958 adapter->msix_entries = NULL;
2959 return err;
2960 }
2961
2962 /**
2963 * ixgbe_intr - legacy mode Interrupt Handler
2964 * @irq: interrupt number
2965 * @data: pointer to a network interface device structure
2966 **/
2967 static irqreturn_t ixgbe_intr(int irq, void *data)
2968 {
2969 struct ixgbe_adapter *adapter = data;
2970 struct ixgbe_hw *hw = &adapter->hw;
2971 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2972 u32 eicr;
2973
2974 /*
2975 * Workaround for silicon errata #26 on 82598. Mask the interrupt
2976 * before the read of EICR.
2977 */
2978 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2979
2980 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2981 * therefore no explicit interrupt disable is necessary */
2982 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2983 if (!eicr) {
2984 /*
2985 * shared interrupt alert!
2986 * make sure interrupts are enabled because the read will
2987 * have disabled interrupts due to EIAM
2988 * finish the workaround of silicon errata on 82598. Unmask
2989 * the interrupt that we masked before the EICR read.
2990 */
2991 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2992 ixgbe_irq_enable(adapter, true, true);
2993 return IRQ_NONE; /* Not our interrupt */
2994 }
2995
2996 if (eicr & IXGBE_EICR_LSC)
2997 ixgbe_check_lsc(adapter);
2998
2999 switch (hw->mac.type) {
3000 case ixgbe_mac_82599EB:
3001 ixgbe_check_sfp_event(adapter, eicr);
3002 /* Fall through */
3003 case ixgbe_mac_X540:
3004 case ixgbe_mac_X550:
3005 case ixgbe_mac_X550EM_x:
3006 case ixgbe_mac_x550em_a:
3007 if (eicr & IXGBE_EICR_ECC) {
3008 e_info(link, "Received ECC Err, initiating reset\n");
3009 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
3010 ixgbe_service_event_schedule(adapter);
3011 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_ECC);
3012 }
3013 ixgbe_check_overtemp_event(adapter, eicr);
3014 break;
3015 default:
3016 break;
3017 }
3018
3019 ixgbe_check_fan_failure(adapter, eicr);
3020 if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
3021 ixgbe_ptp_check_pps_event(adapter);
3022
3023 /* would disable interrupts here but EIAM disabled it */
3024 napi_schedule_irqoff(&q_vector->napi);
3025
3026 /*
3027 * re-enable link(maybe) and non-queue interrupts, no flush.
3028 * ixgbe_poll will re-enable the queue interrupts
3029 */
3030 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3031 ixgbe_irq_enable(adapter, false, false);
3032
3033 return IRQ_HANDLED;
3034 }
3035
3036 /**
3037 * ixgbe_request_irq - initialize interrupts
3038 * @adapter: board private structure
3039 *
3040 * Attempts to configure interrupts using the best available
3041 * capabilities of the hardware and kernel.
3042 **/
3043 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
3044 {
3045 struct net_device *netdev = adapter->netdev;
3046 int err;
3047
3048 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3049 err = ixgbe_request_msix_irqs(adapter);
3050 else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED)
3051 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
3052 netdev->name, adapter);
3053 else
3054 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
3055 netdev->name, adapter);
3056
3057 if (err)
3058 e_err(probe, "request_irq failed, Error %d\n", err);
3059
3060 return err;
3061 }
3062
3063 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
3064 {
3065 int vector;
3066
3067 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
3068 free_irq(adapter->pdev->irq, adapter);
3069 return;
3070 }
3071
3072 for (vector = 0; vector < adapter->num_q_vectors; vector++) {
3073 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
3074 struct msix_entry *entry = &adapter->msix_entries[vector];
3075
3076 /* free only the irqs that were actually requested */
3077 if (!q_vector->rx.ring && !q_vector->tx.ring)
3078 continue;
3079
3080 /* clear the affinity_mask in the IRQ descriptor */
3081 irq_set_affinity_hint(entry->vector, NULL);
3082
3083 free_irq(entry->vector, q_vector);
3084 }
3085
3086 free_irq(adapter->msix_entries[vector++].vector, adapter);
3087 }
3088
3089 /**
3090 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
3091 * @adapter: board private structure
3092 **/
3093 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
3094 {
3095 switch (adapter->hw.mac.type) {
3096 case ixgbe_mac_82598EB:
3097 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
3098 break;
3099 case ixgbe_mac_82599EB:
3100 case ixgbe_mac_X540:
3101 case ixgbe_mac_X550:
3102 case ixgbe_mac_X550EM_x:
3103 case ixgbe_mac_x550em_a:
3104 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
3105 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
3106 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
3107 break;
3108 default:
3109 break;
3110 }
3111 IXGBE_WRITE_FLUSH(&adapter->hw);
3112 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3113 int vector;
3114
3115 for (vector = 0; vector < adapter->num_q_vectors; vector++)
3116 synchronize_irq(adapter->msix_entries[vector].vector);
3117
3118 synchronize_irq(adapter->msix_entries[vector++].vector);
3119 } else {
3120 synchronize_irq(adapter->pdev->irq);
3121 }
3122 }
3123
3124 /**
3125 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
3126 *
3127 **/
3128 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
3129 {
3130 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
3131
3132 ixgbe_write_eitr(q_vector);
3133
3134 ixgbe_set_ivar(adapter, 0, 0, 0);
3135 ixgbe_set_ivar(adapter, 1, 0, 0);
3136
3137 e_info(hw, "Legacy interrupt IVAR setup done\n");
3138 }
3139
3140 /**
3141 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
3142 * @adapter: board private structure
3143 * @ring: structure containing ring specific data
3144 *
3145 * Configure the Tx descriptor ring after a reset.
3146 **/
3147 void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
3148 struct ixgbe_ring *ring)
3149 {
3150 struct ixgbe_hw *hw = &adapter->hw;
3151 u64 tdba = ring->dma;
3152 int wait_loop = 10;
3153 u32 txdctl = IXGBE_TXDCTL_ENABLE;
3154 u8 reg_idx = ring->reg_idx;
3155
3156 /* disable queue to avoid issues while updating state */
3157 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), 0);
3158 IXGBE_WRITE_FLUSH(hw);
3159
3160 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
3161 (tdba & DMA_BIT_MASK(32)));
3162 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
3163 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
3164 ring->count * sizeof(union ixgbe_adv_tx_desc));
3165 IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
3166 IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
3167 ring->tail = adapter->io_addr + IXGBE_TDT(reg_idx);
3168
3169 /*
3170 * set WTHRESH to encourage burst writeback, it should not be set
3171 * higher than 1 when:
3172 * - ITR is 0 as it could cause false TX hangs
3173 * - ITR is set to > 100k int/sec and BQL is enabled
3174 *
3175 * In order to avoid issues WTHRESH + PTHRESH should always be equal
3176 * to or less than the number of on chip descriptors, which is
3177 * currently 40.
3178 */
3179 if (!ring->q_vector || (ring->q_vector->itr < IXGBE_100K_ITR))
3180 txdctl |= (1 << 16); /* WTHRESH = 1 */
3181 else
3182 txdctl |= (8 << 16); /* WTHRESH = 8 */
3183
3184 /*
3185 * Setting PTHRESH to 32 both improves performance
3186 * and avoids a TX hang with DFP enabled
3187 */
3188 txdctl |= (1 << 8) | /* HTHRESH = 1 */
3189 32; /* PTHRESH = 32 */
3190
3191 /* reinitialize flowdirector state */
3192 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3193 ring->atr_sample_rate = adapter->atr_sample_rate;
3194 ring->atr_count = 0;
3195 set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state);
3196 } else {
3197 ring->atr_sample_rate = 0;
3198 }
3199
3200 /* initialize XPS */
3201 if (!test_and_set_bit(__IXGBE_TX_XPS_INIT_DONE, &ring->state)) {
3202 struct ixgbe_q_vector *q_vector = ring->q_vector;
3203
3204 if (q_vector)
3205 netif_set_xps_queue(ring->netdev,
3206 &q_vector->affinity_mask,
3207 ring->queue_index);
3208 }
3209
3210 clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state);
3211
3212 /* enable queue */
3213 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
3214
3215 /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
3216 if (hw->mac.type == ixgbe_mac_82598EB &&
3217 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3218 return;
3219
3220 /* poll to verify queue is enabled */
3221 do {
3222 usleep_range(1000, 2000);
3223 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
3224 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
3225 if (!wait_loop)
3226 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx);
3227 }
3228
3229 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
3230 {
3231 struct ixgbe_hw *hw = &adapter->hw;
3232 u32 rttdcs, mtqc;
3233 u8 tcs = netdev_get_num_tc(adapter->netdev);
3234
3235 if (hw->mac.type == ixgbe_mac_82598EB)
3236 return;
3237
3238 /* disable the arbiter while setting MTQC */
3239 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
3240 rttdcs |= IXGBE_RTTDCS_ARBDIS;
3241 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
3242
3243 /* set transmit pool layout */
3244 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3245 mtqc = IXGBE_MTQC_VT_ENA;
3246 if (tcs > 4)
3247 mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
3248 else if (tcs > 1)
3249 mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
3250 else if (adapter->ring_feature[RING_F_RSS].indices == 4)
3251 mtqc |= IXGBE_MTQC_32VF;
3252 else
3253 mtqc |= IXGBE_MTQC_64VF;
3254 } else {
3255 if (tcs > 4)
3256 mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
3257 else if (tcs > 1)
3258 mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
3259 else
3260 mtqc = IXGBE_MTQC_64Q_1PB;
3261 }
3262
3263 IXGBE_WRITE_REG(hw, IXGBE_MTQC, mtqc);
3264
3265 /* Enable Security TX Buffer IFG for multiple pb */
3266 if (tcs) {
3267 u32 sectx = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);
3268 sectx |= IXGBE_SECTX_DCB;
3269 IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, sectx);
3270 }
3271
3272 /* re-enable the arbiter */
3273 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
3274 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
3275 }
3276
3277 /**
3278 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
3279 * @adapter: board private structure
3280 *
3281 * Configure the Tx unit of the MAC after a reset.
3282 **/
3283 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
3284 {
3285 struct ixgbe_hw *hw = &adapter->hw;
3286 u32 dmatxctl;
3287 u32 i;
3288
3289 ixgbe_setup_mtqc(adapter);
3290
3291 if (hw->mac.type != ixgbe_mac_82598EB) {
3292 /* DMATXCTL.EN must be before Tx queues are enabled */
3293 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
3294 dmatxctl |= IXGBE_DMATXCTL_TE;
3295 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
3296 }
3297
3298 /* Setup the HW Tx Head and Tail descriptor pointers */
3299 for (i = 0; i < adapter->num_tx_queues; i++)
3300 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
3301 }
3302
3303 static void ixgbe_enable_rx_drop(struct ixgbe_adapter *adapter,
3304 struct ixgbe_ring *ring)
3305 {
3306 struct ixgbe_hw *hw = &adapter->hw;
3307 u8 reg_idx = ring->reg_idx;
3308 u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
3309
3310 srrctl |= IXGBE_SRRCTL_DROP_EN;
3311
3312 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3313 }
3314
3315 static void ixgbe_disable_rx_drop(struct ixgbe_adapter *adapter,
3316 struct ixgbe_ring *ring)
3317 {
3318 struct ixgbe_hw *hw = &adapter->hw;
3319 u8 reg_idx = ring->reg_idx;
3320 u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
3321
3322 srrctl &= ~IXGBE_SRRCTL_DROP_EN;
3323
3324 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3325 }
3326
3327 #ifdef CONFIG_IXGBE_DCB
3328 void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
3329 #else
3330 static void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
3331 #endif
3332 {
3333 int i;
3334 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
3335
3336 if (adapter->ixgbe_ieee_pfc)
3337 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
3338
3339 /*
3340 * We should set the drop enable bit if:
3341 * SR-IOV is enabled
3342 * or
3343 * Number of Rx queues > 1 and flow control is disabled
3344 *
3345 * This allows us to avoid head of line blocking for security
3346 * and performance reasons.
3347 */
3348 if (adapter->num_vfs || (adapter->num_rx_queues > 1 &&
3349 !(adapter->hw.fc.current_mode & ixgbe_fc_tx_pause) && !pfc_en)) {
3350 for (i = 0; i < adapter->num_rx_queues; i++)
3351 ixgbe_enable_rx_drop(adapter, adapter->rx_ring[i]);
3352 } else {
3353 for (i = 0; i < adapter->num_rx_queues; i++)
3354 ixgbe_disable_rx_drop(adapter, adapter->rx_ring[i]);
3355 }
3356 }
3357
3358 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
3359
3360 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
3361 struct ixgbe_ring *rx_ring)
3362 {
3363 struct ixgbe_hw *hw = &adapter->hw;
3364 u32 srrctl;
3365 u8 reg_idx = rx_ring->reg_idx;
3366
3367 if (hw->mac.type == ixgbe_mac_82598EB) {
3368 u16 mask = adapter->ring_feature[RING_F_RSS].mask;
3369
3370 /*
3371 * if VMDq is not active we must program one srrctl register
3372 * per RSS queue since we have enabled RDRXCTL.MVMEN
3373 */
3374 reg_idx &= mask;
3375 }
3376
3377 /* configure header buffer length, needed for RSC */
3378 srrctl = IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;
3379
3380 /* configure the packet buffer length */
3381 srrctl |= ixgbe_rx_bufsz(rx_ring) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
3382
3383 /* configure descriptor type */
3384 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
3385
3386 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3387 }
3388
3389 /**
3390 * ixgbe_rss_indir_tbl_entries - Return RSS indirection table entries
3391 * @adapter: device handle
3392 *
3393 * - 82598/82599/X540: 128
3394 * - X550(non-SRIOV mode): 512
3395 * - X550(SRIOV mode): 64
3396 */
3397 u32 ixgbe_rss_indir_tbl_entries(struct ixgbe_adapter *adapter)
3398 {
3399 if (adapter->hw.mac.type < ixgbe_mac_X550)
3400 return 128;
3401 else if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3402 return 64;
3403 else
3404 return 512;
3405 }
3406
3407 /**
3408 * ixgbe_store_reta - Write the RETA table to HW
3409 * @adapter: device handle
3410 *
3411 * Write the RSS redirection table stored in adapter.rss_indir_tbl[] to HW.
3412 */
3413 void ixgbe_store_reta(struct ixgbe_adapter *adapter)
3414 {
3415 u32 i, reta_entries = ixgbe_rss_indir_tbl_entries(adapter);
3416 struct ixgbe_hw *hw = &adapter->hw;
3417 u32 reta = 0;
3418 u32 indices_multi;
3419 u8 *indir_tbl = adapter->rss_indir_tbl;
3420
3421 /* Fill out the redirection table as follows:
3422 * - 82598: 8 bit wide entries containing pair of 4 bit RSS
3423 * indices.
3424 * - 82599/X540: 8 bit wide entries containing 4 bit RSS index
3425 * - X550: 8 bit wide entries containing 6 bit RSS index
3426 */
3427 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
3428 indices_multi = 0x11;
3429 else
3430 indices_multi = 0x1;
3431
3432 /* Write redirection table to HW */
3433 for (i = 0; i < reta_entries; i++) {
3434 reta |= indices_multi * indir_tbl[i] << (i & 0x3) * 8;
3435 if ((i & 3) == 3) {
3436 if (i < 128)
3437 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
3438 else
3439 IXGBE_WRITE_REG(hw, IXGBE_ERETA((i >> 2) - 32),
3440 reta);
3441 reta = 0;
3442 }
3443 }
3444 }
3445
3446 /**
3447 * ixgbe_store_vfreta - Write the RETA table to HW (x550 devices in SRIOV mode)
3448 * @adapter: device handle
3449 *
3450 * Write the RSS redirection table stored in adapter.rss_indir_tbl[] to HW.
3451 */
3452 static void ixgbe_store_vfreta(struct ixgbe_adapter *adapter)
3453 {
3454 u32 i, reta_entries = ixgbe_rss_indir_tbl_entries(adapter);
3455 struct ixgbe_hw *hw = &adapter->hw;
3456 u32 vfreta = 0;
3457 unsigned int pf_pool = adapter->num_vfs;
3458
3459 /* Write redirection table to HW */
3460 for (i = 0; i < reta_entries; i++) {
3461 vfreta |= (u32)adapter->rss_indir_tbl[i] << (i & 0x3) * 8;
3462 if ((i & 3) == 3) {
3463 IXGBE_WRITE_REG(hw, IXGBE_PFVFRETA(i >> 2, pf_pool),
3464 vfreta);
3465 vfreta = 0;
3466 }
3467 }
3468 }
3469
3470 static void ixgbe_setup_reta(struct ixgbe_adapter *adapter)
3471 {
3472 struct ixgbe_hw *hw = &adapter->hw;
3473 u32 i, j;
3474 u32 reta_entries = ixgbe_rss_indir_tbl_entries(adapter);
3475 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;
3476
3477 /* Program table for at least 2 queues w/ SR-IOV so that VFs can
3478 * make full use of any rings they may have. We will use the
3479 * PSRTYPE register to control how many rings we use within the PF.
3480 */
3481 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) && (rss_i < 2))
3482 rss_i = 2;
3483
3484 /* Fill out hash function seeds */
3485 for (i = 0; i < 10; i++)
3486 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), adapter->rss_key[i]);
3487
3488 /* Fill out redirection table */
3489 memset(adapter->rss_indir_tbl, 0, sizeof(adapter->rss_indir_tbl));
3490
3491 for (i = 0, j = 0; i < reta_entries; i++, j++) {
3492 if (j == rss_i)
3493 j = 0;
3494
3495 adapter->rss_indir_tbl[i] = j;
3496 }
3497
3498 ixgbe_store_reta(adapter);
3499 }
3500
3501 static void ixgbe_setup_vfreta(struct ixgbe_adapter *adapter)
3502 {
3503 struct ixgbe_hw *hw = &adapter->hw;
3504 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;
3505 unsigned int pf_pool = adapter->num_vfs;
3506 int i, j;
3507
3508 /* Fill out hash function seeds */
3509 for (i = 0; i < 10; i++)
3510 IXGBE_WRITE_REG(hw, IXGBE_PFVFRSSRK(i, pf_pool),
3511 adapter->rss_key[i]);
3512
3513 /* Fill out the redirection table */
3514 for (i = 0, j = 0; i < 64; i++, j++) {
3515 if (j == rss_i)
3516 j = 0;
3517
3518 adapter->rss_indir_tbl[i] = j;
3519 }
3520
3521 ixgbe_store_vfreta(adapter);
3522 }
3523
3524 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
3525 {
3526 struct ixgbe_hw *hw = &adapter->hw;
3527 u32 mrqc = 0, rss_field = 0, vfmrqc = 0;
3528 u32 rxcsum;
3529
3530 /* Disable indicating checksum in descriptor, enables RSS hash */
3531 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
3532 rxcsum |= IXGBE_RXCSUM_PCSD;
3533 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
3534
3535 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
3536 if (adapter->ring_feature[RING_F_RSS].mask)
3537 mrqc = IXGBE_MRQC_RSSEN;
3538 } else {
3539 u8 tcs = netdev_get_num_tc(adapter->netdev);
3540
3541 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3542 if (tcs > 4)
3543 mrqc = IXGBE_MRQC_VMDQRT8TCEN; /* 8 TCs */
3544 else if (tcs > 1)
3545 mrqc = IXGBE_MRQC_VMDQRT4TCEN; /* 4 TCs */
3546 else if (adapter->ring_feature[RING_F_RSS].indices == 4)
3547 mrqc = IXGBE_MRQC_VMDQRSS32EN;
3548 else
3549 mrqc = IXGBE_MRQC_VMDQRSS64EN;
3550 } else {
3551 if (tcs > 4)
3552 mrqc = IXGBE_MRQC_RTRSS8TCEN;
3553 else if (tcs > 1)
3554 mrqc = IXGBE_MRQC_RTRSS4TCEN;
3555 else
3556 mrqc = IXGBE_MRQC_RSSEN;
3557 }
3558 }
3559
3560 /* Perform hash on these packet types */
3561 rss_field |= IXGBE_MRQC_RSS_FIELD_IPV4 |
3562 IXGBE_MRQC_RSS_FIELD_IPV4_TCP |
3563 IXGBE_MRQC_RSS_FIELD_IPV6 |
3564 IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
3565
3566 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV4_UDP)
3567 rss_field |= IXGBE_MRQC_RSS_FIELD_IPV4_UDP;
3568 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV6_UDP)
3569 rss_field |= IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
3570
3571 netdev_rss_key_fill(adapter->rss_key, sizeof(adapter->rss_key));
3572 if ((hw->mac.type >= ixgbe_mac_X550) &&
3573 (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) {
3574 unsigned int pf_pool = adapter->num_vfs;
3575
3576 /* Enable VF RSS mode */
3577 mrqc |= IXGBE_MRQC_MULTIPLE_RSS;
3578 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
3579
3580 /* Setup RSS through the VF registers */
3581 ixgbe_setup_vfreta(adapter);
3582 vfmrqc = IXGBE_MRQC_RSSEN;
3583 vfmrqc |= rss_field;
3584 IXGBE_WRITE_REG(hw, IXGBE_PFVFMRQC(pf_pool), vfmrqc);
3585 } else {
3586 ixgbe_setup_reta(adapter);
3587 mrqc |= rss_field;
3588 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
3589 }
3590 }
3591
3592 /**
3593 * ixgbe_configure_rscctl - enable RSC for the indicated ring
3594 * @adapter: address of board private structure
3595 * @index: index of ring to set
3596 **/
3597 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
3598 struct ixgbe_ring *ring)
3599 {
3600 struct ixgbe_hw *hw = &adapter->hw;
3601 u32 rscctrl;
3602 u8 reg_idx = ring->reg_idx;
3603
3604 if (!ring_is_rsc_enabled(ring))
3605 return;
3606
3607 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
3608 rscctrl |= IXGBE_RSCCTL_RSCEN;
3609 /*
3610 * we must limit the number of descriptors so that the
3611 * total size of max desc * buf_len is not greater
3612 * than 65536
3613 */
3614 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
3615 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
3616 }
3617
3618 #define IXGBE_MAX_RX_DESC_POLL 10
3619 static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
3620 struct ixgbe_ring *ring)
3621 {
3622 struct ixgbe_hw *hw = &adapter->hw;
3623 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3624 u32 rxdctl;
3625 u8 reg_idx = ring->reg_idx;
3626
3627 if (ixgbe_removed(hw->hw_addr))
3628 return;
3629 /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
3630 if (hw->mac.type == ixgbe_mac_82598EB &&
3631 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3632 return;
3633
3634 do {
3635 usleep_range(1000, 2000);
3636 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3637 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
3638
3639 if (!wait_loop) {
3640 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
3641 "the polling period\n", reg_idx);
3642 }
3643 }
3644
3645 void ixgbe_disable_rx_queue(struct ixgbe_adapter *adapter,
3646 struct ixgbe_ring *ring)
3647 {
3648 struct ixgbe_hw *hw = &adapter->hw;
3649 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3650 u32 rxdctl;
3651 u8 reg_idx = ring->reg_idx;
3652
3653 if (ixgbe_removed(hw->hw_addr))
3654 return;
3655 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3656 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
3657
3658 /* write value back with RXDCTL.ENABLE bit cleared */
3659 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3660
3661 if (hw->mac.type == ixgbe_mac_82598EB &&
3662 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3663 return;
3664
3665 /* the hardware may take up to 100us to really disable the rx queue */
3666 do {
3667 udelay(10);
3668 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3669 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
3670
3671 if (!wait_loop) {
3672 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not cleared within "
3673 "the polling period\n", reg_idx);
3674 }
3675 }
3676
3677 void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
3678 struct ixgbe_ring *ring)
3679 {
3680 struct ixgbe_hw *hw = &adapter->hw;
3681 u64 rdba = ring->dma;
3682 u32 rxdctl;
3683 u8 reg_idx = ring->reg_idx;
3684
3685 /* disable queue to avoid issues while updating state */
3686 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3687 ixgbe_disable_rx_queue(adapter, ring);
3688
3689 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
3690 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
3691 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
3692 ring->count * sizeof(union ixgbe_adv_rx_desc));
3693 /* Force flushing of IXGBE_RDLEN to prevent MDD */
3694 IXGBE_WRITE_FLUSH(hw);
3695
3696 IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
3697 IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
3698 ring->tail = adapter->io_addr + IXGBE_RDT(reg_idx);
3699
3700 ixgbe_configure_srrctl(adapter, ring);
3701 ixgbe_configure_rscctl(adapter, ring);
3702
3703 if (hw->mac.type == ixgbe_mac_82598EB) {
3704 /*
3705 * enable cache line friendly hardware writes:
3706 * PTHRESH=32 descriptors (half the internal cache),
3707 * this also removes ugly rx_no_buffer_count increment
3708 * HTHRESH=4 descriptors (to minimize latency on fetch)
3709 * WTHRESH=8 burst writeback up to two cache lines
3710 */
3711 rxdctl &= ~0x3FFFFF;
3712 rxdctl |= 0x080420;
3713 }
3714
3715 /* enable receive descriptor ring */
3716 rxdctl |= IXGBE_RXDCTL_ENABLE;
3717 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3718
3719 ixgbe_rx_desc_queue_enable(adapter, ring);
3720 ixgbe_alloc_rx_buffers(ring, ixgbe_desc_unused(ring));
3721 }
3722
3723 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
3724 {
3725 struct ixgbe_hw *hw = &adapter->hw;
3726 int rss_i = adapter->ring_feature[RING_F_RSS].indices;
3727 u16 pool;
3728
3729 /* PSRTYPE must be initialized in non 82598 adapters */
3730 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
3731 IXGBE_PSRTYPE_UDPHDR |
3732 IXGBE_PSRTYPE_IPV4HDR |
3733 IXGBE_PSRTYPE_L2HDR |
3734 IXGBE_PSRTYPE_IPV6HDR;
3735
3736 if (hw->mac.type == ixgbe_mac_82598EB)
3737 return;
3738
3739 if (rss_i > 3)
3740 psrtype |= 2 << 29;
3741 else if (rss_i > 1)
3742 psrtype |= 1 << 29;
3743
3744 for_each_set_bit(pool, &adapter->fwd_bitmask, 32)
3745 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(VMDQ_P(pool)), psrtype);
3746 }
3747
3748 static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
3749 {
3750 struct ixgbe_hw *hw = &adapter->hw;
3751 u32 reg_offset, vf_shift;
3752 u32 gcr_ext, vmdctl;
3753 int i;
3754
3755 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
3756 return;
3757
3758 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
3759 vmdctl |= IXGBE_VMD_CTL_VMDQ_EN;
3760 vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
3761 vmdctl |= VMDQ_P(0) << IXGBE_VT_CTL_POOL_SHIFT;
3762 vmdctl |= IXGBE_VT_CTL_REPLEN;
3763 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
3764
3765 vf_shift = VMDQ_P(0) % 32;
3766 reg_offset = (VMDQ_P(0) >= 32) ? 1 : 0;
3767
3768 /* Enable only the PF's pool for Tx/Rx */
3769 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (~0) << vf_shift);
3770 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), reg_offset - 1);
3771 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (~0) << vf_shift);
3772 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), reg_offset - 1);
3773 if (adapter->bridge_mode == BRIDGE_MODE_VEB)
3774 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
3775
3776 /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
3777 hw->mac.ops.set_vmdq(hw, 0, VMDQ_P(0));
3778
3779 /* clear VLAN promisc flag so VFTA will be updated if necessary */
3780 adapter->flags2 &= ~IXGBE_FLAG2_VLAN_PROMISC;
3781
3782 /*
3783 * Set up VF register offsets for selected VT Mode,
3784 * i.e. 32 or 64 VFs for SR-IOV
3785 */
3786 switch (adapter->ring_feature[RING_F_VMDQ].mask) {
3787 case IXGBE_82599_VMDQ_8Q_MASK:
3788 gcr_ext = IXGBE_GCR_EXT_VT_MODE_16;
3789 break;
3790 case IXGBE_82599_VMDQ_4Q_MASK:
3791 gcr_ext = IXGBE_GCR_EXT_VT_MODE_32;
3792 break;
3793 default:
3794 gcr_ext = IXGBE_GCR_EXT_VT_MODE_64;
3795 break;
3796 }
3797
3798 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
3799
3800 for (i = 0; i < adapter->num_vfs; i++) {
3801 /* configure spoof checking */
3802 ixgbe_ndo_set_vf_spoofchk(adapter->netdev, i,
3803 adapter->vfinfo[i].spoofchk_enabled);
3804
3805 /* Enable/Disable RSS query feature */
3806 ixgbe_ndo_set_vf_rss_query_en(adapter->netdev, i,
3807 adapter->vfinfo[i].rss_query_enabled);
3808 }
3809 }
3810
3811 static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
3812 {
3813 struct ixgbe_hw *hw = &adapter->hw;
3814 struct net_device *netdev = adapter->netdev;
3815 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3816 struct ixgbe_ring *rx_ring;
3817 int i;
3818 u32 mhadd, hlreg0;
3819
3820 #ifdef IXGBE_FCOE
3821 /* adjust max frame to be able to do baby jumbo for FCoE */
3822 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
3823 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
3824 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
3825
3826 #endif /* IXGBE_FCOE */
3827
3828 /* adjust max frame to be at least the size of a standard frame */
3829 if (max_frame < (ETH_FRAME_LEN + ETH_FCS_LEN))
3830 max_frame = (ETH_FRAME_LEN + ETH_FCS_LEN);
3831
3832 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
3833 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
3834 mhadd &= ~IXGBE_MHADD_MFS_MASK;
3835 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
3836
3837 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
3838 }
3839
3840 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
3841 /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
3842 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
3843 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
3844
3845 /*
3846 * Setup the HW Rx Head and Tail Descriptor Pointers and
3847 * the Base and Length of the Rx Descriptor Ring
3848 */
3849 for (i = 0; i < adapter->num_rx_queues; i++) {
3850 rx_ring = adapter->rx_ring[i];
3851 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
3852 set_ring_rsc_enabled(rx_ring);
3853 else
3854 clear_ring_rsc_enabled(rx_ring);
3855 }
3856 }
3857
3858 static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
3859 {
3860 struct ixgbe_hw *hw = &adapter->hw;
3861 u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
3862
3863 switch (hw->mac.type) {
3864 case ixgbe_mac_82598EB:
3865 /*
3866 * For VMDq support of different descriptor types or
3867 * buffer sizes through the use of multiple SRRCTL
3868 * registers, RDRXCTL.MVMEN must be set to 1
3869 *
3870 * also, the manual doesn't mention it clearly but DCA hints
3871 * will only use queue 0's tags unless this bit is set. Side
3872 * effects of setting this bit are only that SRRCTL must be
3873 * fully programmed [0..15]
3874 */
3875 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
3876 break;
3877 case ixgbe_mac_X550:
3878 case ixgbe_mac_X550EM_x:
3879 case ixgbe_mac_x550em_a:
3880 if (adapter->num_vfs)
3881 rdrxctl |= IXGBE_RDRXCTL_PSP;
3882 /* fall through for older HW */
3883 case ixgbe_mac_82599EB:
3884 case ixgbe_mac_X540:
3885 /* Disable RSC for ACK packets */
3886 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
3887 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
3888 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
3889 /* hardware requires some bits to be set by default */
3890 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
3891 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
3892 break;
3893 default:
3894 /* We should do nothing since we don't know this hardware */
3895 return;
3896 }
3897
3898 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
3899 }
3900
3901 /**
3902 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
3903 * @adapter: board private structure
3904 *
3905 * Configure the Rx unit of the MAC after a reset.
3906 **/
3907 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
3908 {
3909 struct ixgbe_hw *hw = &adapter->hw;
3910 int i;
3911 u32 rxctrl, rfctl;
3912
3913 /* disable receives while setting up the descriptors */
3914 hw->mac.ops.disable_rx(hw);
3915
3916 ixgbe_setup_psrtype(adapter);
3917 ixgbe_setup_rdrxctl(adapter);
3918
3919 /* RSC Setup */
3920 rfctl = IXGBE_READ_REG(hw, IXGBE_RFCTL);
3921 rfctl &= ~IXGBE_RFCTL_RSC_DIS;
3922 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
3923 rfctl |= IXGBE_RFCTL_RSC_DIS;
3924 IXGBE_WRITE_REG(hw, IXGBE_RFCTL, rfctl);
3925
3926 /* Program registers for the distribution of queues */
3927 ixgbe_setup_mrqc(adapter);
3928
3929 /* set_rx_buffer_len must be called before ring initialization */
3930 ixgbe_set_rx_buffer_len(adapter);
3931
3932 /*
3933 * Setup the HW Rx Head and Tail Descriptor Pointers and
3934 * the Base and Length of the Rx Descriptor Ring
3935 */
3936 for (i = 0; i < adapter->num_rx_queues; i++)
3937 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
3938
3939 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3940 /* disable drop enable for 82598 parts */
3941 if (hw->mac.type == ixgbe_mac_82598EB)
3942 rxctrl |= IXGBE_RXCTRL_DMBYPS;
3943
3944 /* enable all receives */
3945 rxctrl |= IXGBE_RXCTRL_RXEN;
3946 hw->mac.ops.enable_rx_dma(hw, rxctrl);
3947 }
3948
3949 static int ixgbe_vlan_rx_add_vid(struct net_device *netdev,
3950 __be16 proto, u16 vid)
3951 {
3952 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3953 struct ixgbe_hw *hw = &adapter->hw;
3954
3955 /* add VID to filter table */
3956 if (!vid || !(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
3957 hw->mac.ops.set_vfta(&adapter->hw, vid, VMDQ_P(0), true, !!vid);
3958
3959 set_bit(vid, adapter->active_vlans);
3960
3961 return 0;
3962 }
3963
3964 static int ixgbe_find_vlvf_entry(struct ixgbe_hw *hw, u32 vlan)
3965 {
3966 u32 vlvf;
3967 int idx;
3968
3969 /* short cut the special case */
3970 if (vlan == 0)
3971 return 0;
3972
3973 /* Search for the vlan id in the VLVF entries */
3974 for (idx = IXGBE_VLVF_ENTRIES; --idx;) {
3975 vlvf = IXGBE_READ_REG(hw, IXGBE_VLVF(idx));
3976 if ((vlvf & VLAN_VID_MASK) == vlan)
3977 break;
3978 }
3979
3980 return idx;
3981 }
3982
3983 void ixgbe_update_pf_promisc_vlvf(struct ixgbe_adapter *adapter, u32 vid)
3984 {
3985 struct ixgbe_hw *hw = &adapter->hw;
3986 u32 bits, word;
3987 int idx;
3988
3989 idx = ixgbe_find_vlvf_entry(hw, vid);
3990 if (!idx)
3991 return;
3992
3993 /* See if any other pools are set for this VLAN filter
3994 * entry other than the PF.
3995 */
3996 word = idx * 2 + (VMDQ_P(0) / 32);
3997 bits = ~(1 << (VMDQ_P(0)) % 32);
3998 bits &= IXGBE_READ_REG(hw, IXGBE_VLVFB(word));
3999
4000 /* Disable the filter so this falls into the default pool. */
4001 if (!bits && !IXGBE_READ_REG(hw, IXGBE_VLVFB(word ^ 1))) {
4002 if (!(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
4003 IXGBE_WRITE_REG(hw, IXGBE_VLVFB(word), 0);
4004 IXGBE_WRITE_REG(hw, IXGBE_VLVF(idx), 0);
4005 }
4006 }
4007
4008 static int ixgbe_vlan_rx_kill_vid(struct net_device *netdev,
4009 __be16 proto, u16 vid)
4010 {
4011 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4012 struct ixgbe_hw *hw = &adapter->hw;
4013
4014 /* remove VID from filter table */
4015 if (vid && !(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
4016 hw->mac.ops.set_vfta(hw, vid, VMDQ_P(0), false, true);
4017
4018 clear_bit(vid, adapter->active_vlans);
4019
4020 return 0;
4021 }
4022
4023 /**
4024 * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping
4025 * @adapter: driver data
4026 */
4027 static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
4028 {
4029 struct ixgbe_hw *hw = &adapter->hw;
4030 u32 vlnctrl;
4031 int i, j;
4032
4033 switch (hw->mac.type) {
4034 case ixgbe_mac_82598EB:
4035 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
4036 vlnctrl &= ~IXGBE_VLNCTRL_VME;
4037 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
4038 break;
4039 case ixgbe_mac_82599EB:
4040 case ixgbe_mac_X540:
4041 case ixgbe_mac_X550:
4042 case ixgbe_mac_X550EM_x:
4043 case ixgbe_mac_x550em_a:
4044 for (i = 0; i < adapter->num_rx_queues; i++) {
4045 struct ixgbe_ring *ring = adapter->rx_ring[i];
4046
4047 if (ring->l2_accel_priv)
4048 continue;
4049 j = ring->reg_idx;
4050 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
4051 vlnctrl &= ~IXGBE_RXDCTL_VME;
4052 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
4053 }
4054 break;
4055 default:
4056 break;
4057 }
4058 }
4059
4060 /**
4061 * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping
4062 * @adapter: driver data
4063 */
4064 static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
4065 {
4066 struct ixgbe_hw *hw = &adapter->hw;
4067 u32 vlnctrl;
4068 int i, j;
4069
4070 switch (hw->mac.type) {
4071 case ixgbe_mac_82598EB:
4072 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
4073 vlnctrl |= IXGBE_VLNCTRL_VME;
4074 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
4075 break;
4076 case ixgbe_mac_82599EB:
4077 case ixgbe_mac_X540:
4078 case ixgbe_mac_X550:
4079 case ixgbe_mac_X550EM_x:
4080 case ixgbe_mac_x550em_a:
4081 for (i = 0; i < adapter->num_rx_queues; i++) {
4082 struct ixgbe_ring *ring = adapter->rx_ring[i];
4083
4084 if (ring->l2_accel_priv)
4085 continue;
4086 j = ring->reg_idx;
4087 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
4088 vlnctrl |= IXGBE_RXDCTL_VME;
4089 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
4090 }
4091 break;
4092 default:
4093 break;
4094 }
4095 }
4096
4097 static void ixgbe_vlan_promisc_enable(struct ixgbe_adapter *adapter)
4098 {
4099 struct ixgbe_hw *hw = &adapter->hw;
4100 u32 vlnctrl, i;
4101
4102 switch (hw->mac.type) {
4103 case ixgbe_mac_82599EB:
4104 case ixgbe_mac_X540:
4105 case ixgbe_mac_X550:
4106 case ixgbe_mac_X550EM_x:
4107 case ixgbe_mac_x550em_a:
4108 default:
4109 if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED)
4110 break;
4111 /* fall through */
4112 case ixgbe_mac_82598EB:
4113 /* legacy case, we can just disable VLAN filtering */
4114 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
4115 vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
4116 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
4117 return;
4118 }
4119
4120 /* We are already in VLAN promisc, nothing to do */
4121 if (adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC)
4122 return;
4123
4124 /* Set flag so we don't redo unnecessary work */
4125 adapter->flags2 |= IXGBE_FLAG2_VLAN_PROMISC;
4126
4127 /* Add PF to all active pools */
4128 for (i = IXGBE_VLVF_ENTRIES; --i;) {
4129 u32 reg_offset = IXGBE_VLVFB(i * 2 + VMDQ_P(0) / 32);
4130 u32 vlvfb = IXGBE_READ_REG(hw, reg_offset);
4131
4132 vlvfb |= 1 << (VMDQ_P(0) % 32);
4133 IXGBE_WRITE_REG(hw, reg_offset, vlvfb);
4134 }
4135
4136 /* Set all bits in the VLAN filter table array */
4137 for (i = hw->mac.vft_size; i--;)
4138 IXGBE_WRITE_REG(hw, IXGBE_VFTA(i), ~0U);
4139 }
4140
4141 #define VFTA_BLOCK_SIZE 8
4142 static void ixgbe_scrub_vfta(struct ixgbe_adapter *adapter, u32 vfta_offset)
4143 {
4144 struct ixgbe_hw *hw = &adapter->hw;
4145 u32 vfta[VFTA_BLOCK_SIZE] = { 0 };
4146 u32 vid_start = vfta_offset * 32;
4147 u32 vid_end = vid_start + (VFTA_BLOCK_SIZE * 32);
4148 u32 i, vid, word, bits;
4149
4150 for (i = IXGBE_VLVF_ENTRIES; --i;) {
4151 u32 vlvf = IXGBE_READ_REG(hw, IXGBE_VLVF(i));
4152
4153 /* pull VLAN ID from VLVF */
4154 vid = vlvf & VLAN_VID_MASK;
4155
4156 /* only concern outselves with a certain range */
4157 if (vid < vid_start || vid >= vid_end)
4158 continue;
4159
4160 if (vlvf) {
4161 /* record VLAN ID in VFTA */
4162 vfta[(vid - vid_start) / 32] |= 1 << (vid % 32);
4163
4164 /* if PF is part of this then continue */
4165 if (test_bit(vid, adapter->active_vlans))
4166 continue;
4167 }
4168
4169 /* remove PF from the pool */
4170 word = i * 2 + VMDQ_P(0) / 32;
4171 bits = ~(1 << (VMDQ_P(0) % 32));
4172 bits &= IXGBE_READ_REG(hw, IXGBE_VLVFB(word));
4173 IXGBE_WRITE_REG(hw, IXGBE_VLVFB(word), bits);
4174 }
4175
4176 /* extract values from active_vlans and write back to VFTA */
4177 for (i = VFTA_BLOCK_SIZE; i--;) {
4178 vid = (vfta_offset + i) * 32;
4179 word = vid / BITS_PER_LONG;
4180 bits = vid % BITS_PER_LONG;
4181
4182 vfta[i] |= adapter->active_vlans[word] >> bits;
4183
4184 IXGBE_WRITE_REG(hw, IXGBE_VFTA(vfta_offset + i), vfta[i]);
4185 }
4186 }
4187
4188 static void ixgbe_vlan_promisc_disable(struct ixgbe_adapter *adapter)
4189 {
4190 struct ixgbe_hw *hw = &adapter->hw;
4191 u32 vlnctrl, i;
4192
4193 switch (hw->mac.type) {
4194 case ixgbe_mac_82599EB:
4195 case ixgbe_mac_X540:
4196 case ixgbe_mac_X550:
4197 case ixgbe_mac_X550EM_x:
4198 case ixgbe_mac_x550em_a:
4199 default:
4200 if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED)
4201 break;
4202 /* fall through */
4203 case ixgbe_mac_82598EB:
4204 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
4205 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
4206 vlnctrl |= IXGBE_VLNCTRL_VFE;
4207 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
4208 return;
4209 }
4210
4211 /* We are not in VLAN promisc, nothing to do */
4212 if (!(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
4213 return;
4214
4215 /* Set flag so we don't redo unnecessary work */
4216 adapter->flags2 &= ~IXGBE_FLAG2_VLAN_PROMISC;
4217
4218 for (i = 0; i < hw->mac.vft_size; i += VFTA_BLOCK_SIZE)
4219 ixgbe_scrub_vfta(adapter, i);
4220 }
4221
4222 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
4223 {
4224 u16 vid = 1;
4225
4226 ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0);
4227
4228 for_each_set_bit_from(vid, adapter->active_vlans, VLAN_N_VID)
4229 ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
4230 }
4231
4232 /**
4233 * ixgbe_write_mc_addr_list - write multicast addresses to MTA
4234 * @netdev: network interface device structure
4235 *
4236 * Writes multicast address list to the MTA hash table.
4237 * Returns: -ENOMEM on failure
4238 * 0 on no addresses written
4239 * X on writing X addresses to MTA
4240 **/
4241 static int ixgbe_write_mc_addr_list(struct net_device *netdev)
4242 {
4243 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4244 struct ixgbe_hw *hw = &adapter->hw;
4245
4246 if (!netif_running(netdev))
4247 return 0;
4248
4249 if (hw->mac.ops.update_mc_addr_list)
4250 hw->mac.ops.update_mc_addr_list(hw, netdev);
4251 else
4252 return -ENOMEM;
4253
4254 #ifdef CONFIG_PCI_IOV
4255 ixgbe_restore_vf_multicasts(adapter);
4256 #endif
4257
4258 return netdev_mc_count(netdev);
4259 }
4260
4261 #ifdef CONFIG_PCI_IOV
4262 void ixgbe_full_sync_mac_table(struct ixgbe_adapter *adapter)
4263 {
4264 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4265 struct ixgbe_hw *hw = &adapter->hw;
4266 int i;
4267
4268 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4269 mac_table->state &= ~IXGBE_MAC_STATE_MODIFIED;
4270
4271 if (mac_table->state & IXGBE_MAC_STATE_IN_USE)
4272 hw->mac.ops.set_rar(hw, i,
4273 mac_table->addr,
4274 mac_table->pool,
4275 IXGBE_RAH_AV);
4276 else
4277 hw->mac.ops.clear_rar(hw, i);
4278 }
4279 }
4280
4281 #endif
4282 static void ixgbe_sync_mac_table(struct ixgbe_adapter *adapter)
4283 {
4284 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4285 struct ixgbe_hw *hw = &adapter->hw;
4286 int i;
4287
4288 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4289 if (!(mac_table->state & IXGBE_MAC_STATE_MODIFIED))
4290 continue;
4291
4292 mac_table->state &= ~IXGBE_MAC_STATE_MODIFIED;
4293
4294 if (mac_table->state & IXGBE_MAC_STATE_IN_USE)
4295 hw->mac.ops.set_rar(hw, i,
4296 mac_table->addr,
4297 mac_table->pool,
4298 IXGBE_RAH_AV);
4299 else
4300 hw->mac.ops.clear_rar(hw, i);
4301 }
4302 }
4303
4304 static void ixgbe_flush_sw_mac_table(struct ixgbe_adapter *adapter)
4305 {
4306 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4307 struct ixgbe_hw *hw = &adapter->hw;
4308 int i;
4309
4310 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4311 mac_table->state |= IXGBE_MAC_STATE_MODIFIED;
4312 mac_table->state &= ~IXGBE_MAC_STATE_IN_USE;
4313 }
4314
4315 ixgbe_sync_mac_table(adapter);
4316 }
4317
4318 static int ixgbe_available_rars(struct ixgbe_adapter *adapter, u16 pool)
4319 {
4320 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4321 struct ixgbe_hw *hw = &adapter->hw;
4322 int i, count = 0;
4323
4324 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4325 /* do not count default RAR as available */
4326 if (mac_table->state & IXGBE_MAC_STATE_DEFAULT)
4327 continue;
4328
4329 /* only count unused and addresses that belong to us */
4330 if (mac_table->state & IXGBE_MAC_STATE_IN_USE) {
4331 if (mac_table->pool != pool)
4332 continue;
4333 }
4334
4335 count++;
4336 }
4337
4338 return count;
4339 }
4340
4341 /* this function destroys the first RAR entry */
4342 static void ixgbe_mac_set_default_filter(struct ixgbe_adapter *adapter)
4343 {
4344 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4345 struct ixgbe_hw *hw = &adapter->hw;
4346
4347 memcpy(&mac_table->addr, hw->mac.addr, ETH_ALEN);
4348 mac_table->pool = VMDQ_P(0);
4349
4350 mac_table->state = IXGBE_MAC_STATE_DEFAULT | IXGBE_MAC_STATE_IN_USE;
4351
4352 hw->mac.ops.set_rar(hw, 0, mac_table->addr, mac_table->pool,
4353 IXGBE_RAH_AV);
4354 }
4355
4356 int ixgbe_add_mac_filter(struct ixgbe_adapter *adapter,
4357 const u8 *addr, u16 pool)
4358 {
4359 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4360 struct ixgbe_hw *hw = &adapter->hw;
4361 int i;
4362
4363 if (is_zero_ether_addr(addr))
4364 return -EINVAL;
4365
4366 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4367 if (mac_table->state & IXGBE_MAC_STATE_IN_USE)
4368 continue;
4369
4370 ether_addr_copy(mac_table->addr, addr);
4371 mac_table->pool = pool;
4372
4373 mac_table->state |= IXGBE_MAC_STATE_MODIFIED |
4374 IXGBE_MAC_STATE_IN_USE;
4375
4376 ixgbe_sync_mac_table(adapter);
4377
4378 return i;
4379 }
4380
4381 return -ENOMEM;
4382 }
4383
4384 int ixgbe_del_mac_filter(struct ixgbe_adapter *adapter,
4385 const u8 *addr, u16 pool)
4386 {
4387 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4388 struct ixgbe_hw *hw = &adapter->hw;
4389 int i;
4390
4391 if (is_zero_ether_addr(addr))
4392 return -EINVAL;
4393
4394 /* search table for addr, if found clear IN_USE flag and sync */
4395 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4396 /* we can only delete an entry if it is in use */
4397 if (!(mac_table->state & IXGBE_MAC_STATE_IN_USE))
4398 continue;
4399 /* we only care about entries that belong to the given pool */
4400 if (mac_table->pool != pool)
4401 continue;
4402 /* we only care about a specific MAC address */
4403 if (!ether_addr_equal(addr, mac_table->addr))
4404 continue;
4405
4406 mac_table->state |= IXGBE_MAC_STATE_MODIFIED;
4407 mac_table->state &= ~IXGBE_MAC_STATE_IN_USE;
4408
4409 ixgbe_sync_mac_table(adapter);
4410
4411 return 0;
4412 }
4413
4414 return -ENOMEM;
4415 }
4416 /**
4417 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
4418 * @netdev: network interface device structure
4419 *
4420 * Writes unicast address list to the RAR table.
4421 * Returns: -ENOMEM on failure/insufficient address space
4422 * 0 on no addresses written
4423 * X on writing X addresses to the RAR table
4424 **/
4425 static int ixgbe_write_uc_addr_list(struct net_device *netdev, int vfn)
4426 {
4427 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4428 int count = 0;
4429
4430 /* return ENOMEM indicating insufficient memory for addresses */
4431 if (netdev_uc_count(netdev) > ixgbe_available_rars(adapter, vfn))
4432 return -ENOMEM;
4433
4434 if (!netdev_uc_empty(netdev)) {
4435 struct netdev_hw_addr *ha;
4436 netdev_for_each_uc_addr(ha, netdev) {
4437 ixgbe_del_mac_filter(adapter, ha->addr, vfn);
4438 ixgbe_add_mac_filter(adapter, ha->addr, vfn);
4439 count++;
4440 }
4441 }
4442 return count;
4443 }
4444
4445 static int ixgbe_uc_sync(struct net_device *netdev, const unsigned char *addr)
4446 {
4447 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4448 int ret;
4449
4450 ret = ixgbe_add_mac_filter(adapter, addr, VMDQ_P(0));
4451
4452 return min_t(int, ret, 0);
4453 }
4454
4455 static int ixgbe_uc_unsync(struct net_device *netdev, const unsigned char *addr)
4456 {
4457 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4458
4459 ixgbe_del_mac_filter(adapter, addr, VMDQ_P(0));
4460
4461 return 0;
4462 }
4463
4464 /**
4465 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
4466 * @netdev: network interface device structure
4467 *
4468 * The set_rx_method entry point is called whenever the unicast/multicast
4469 * address list or the network interface flags are updated. This routine is
4470 * responsible for configuring the hardware for proper unicast, multicast and
4471 * promiscuous mode.
4472 **/
4473 void ixgbe_set_rx_mode(struct net_device *netdev)
4474 {
4475 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4476 struct ixgbe_hw *hw = &adapter->hw;
4477 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
4478 netdev_features_t features = netdev->features;
4479 int count;
4480
4481 /* Check for Promiscuous and All Multicast modes */
4482 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4483
4484 /* set all bits that we expect to always be set */
4485 fctrl &= ~IXGBE_FCTRL_SBP; /* disable store-bad-packets */
4486 fctrl |= IXGBE_FCTRL_BAM;
4487 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
4488 fctrl |= IXGBE_FCTRL_PMCF;
4489
4490 /* clear the bits we are changing the status of */
4491 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
4492 if (netdev->flags & IFF_PROMISC) {
4493 hw->addr_ctrl.user_set_promisc = true;
4494 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
4495 vmolr |= IXGBE_VMOLR_MPE;
4496 features &= ~NETIF_F_HW_VLAN_CTAG_FILTER;
4497 } else {
4498 if (netdev->flags & IFF_ALLMULTI) {
4499 fctrl |= IXGBE_FCTRL_MPE;
4500 vmolr |= IXGBE_VMOLR_MPE;
4501 }
4502 hw->addr_ctrl.user_set_promisc = false;
4503 }
4504
4505 /*
4506 * Write addresses to available RAR registers, if there is not
4507 * sufficient space to store all the addresses then enable
4508 * unicast promiscuous mode
4509 */
4510 if (__dev_uc_sync(netdev, ixgbe_uc_sync, ixgbe_uc_unsync)) {
4511 fctrl |= IXGBE_FCTRL_UPE;
4512 vmolr |= IXGBE_VMOLR_ROPE;
4513 }
4514
4515 /* Write addresses to the MTA, if the attempt fails
4516 * then we should just turn on promiscuous mode so
4517 * that we can at least receive multicast traffic
4518 */
4519 count = ixgbe_write_mc_addr_list(netdev);
4520 if (count < 0) {
4521 fctrl |= IXGBE_FCTRL_MPE;
4522 vmolr |= IXGBE_VMOLR_MPE;
4523 } else if (count) {
4524 vmolr |= IXGBE_VMOLR_ROMPE;
4525 }
4526
4527 if (hw->mac.type != ixgbe_mac_82598EB) {
4528 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(VMDQ_P(0))) &
4529 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
4530 IXGBE_VMOLR_ROPE);
4531 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(VMDQ_P(0)), vmolr);
4532 }
4533
4534 /* This is useful for sniffing bad packets. */
4535 if (features & NETIF_F_RXALL) {
4536 /* UPE and MPE will be handled by normal PROMISC logic
4537 * in e1000e_set_rx_mode */
4538 fctrl |= (IXGBE_FCTRL_SBP | /* Receive bad packets */
4539 IXGBE_FCTRL_BAM | /* RX All Bcast Pkts */
4540 IXGBE_FCTRL_PMCF); /* RX All MAC Ctrl Pkts */
4541
4542 fctrl &= ~(IXGBE_FCTRL_DPF);
4543 /* NOTE: VLAN filtering is disabled by setting PROMISC */
4544 }
4545
4546 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
4547
4548 if (features & NETIF_F_HW_VLAN_CTAG_RX)
4549 ixgbe_vlan_strip_enable(adapter);
4550 else
4551 ixgbe_vlan_strip_disable(adapter);
4552
4553 if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
4554 ixgbe_vlan_promisc_disable(adapter);
4555 else
4556 ixgbe_vlan_promisc_enable(adapter);
4557 }
4558
4559 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
4560 {
4561 int q_idx;
4562
4563 for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) {
4564 ixgbe_qv_init_lock(adapter->q_vector[q_idx]);
4565 napi_enable(&adapter->q_vector[q_idx]->napi);
4566 }
4567 }
4568
4569 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
4570 {
4571 int q_idx;
4572
4573 for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) {
4574 napi_disable(&adapter->q_vector[q_idx]->napi);
4575 while (!ixgbe_qv_disable(adapter->q_vector[q_idx])) {
4576 pr_info("QV %d locked\n", q_idx);
4577 usleep_range(1000, 20000);
4578 }
4579 }
4580 }
4581
4582 static void ixgbe_clear_vxlan_port(struct ixgbe_adapter *adapter)
4583 {
4584 switch (adapter->hw.mac.type) {
4585 case ixgbe_mac_X550:
4586 case ixgbe_mac_X550EM_x:
4587 case ixgbe_mac_x550em_a:
4588 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VXLANCTRL, 0);
4589 adapter->vxlan_port = 0;
4590 break;
4591 default:
4592 break;
4593 }
4594 }
4595
4596 #ifdef CONFIG_IXGBE_DCB
4597 /**
4598 * ixgbe_configure_dcb - Configure DCB hardware
4599 * @adapter: ixgbe adapter struct
4600 *
4601 * This is called by the driver on open to configure the DCB hardware.
4602 * This is also called by the gennetlink interface when reconfiguring
4603 * the DCB state.
4604 */
4605 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
4606 {
4607 struct ixgbe_hw *hw = &adapter->hw;
4608 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
4609
4610 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
4611 if (hw->mac.type == ixgbe_mac_82598EB)
4612 netif_set_gso_max_size(adapter->netdev, 65536);
4613 return;
4614 }
4615
4616 if (hw->mac.type == ixgbe_mac_82598EB)
4617 netif_set_gso_max_size(adapter->netdev, 32768);
4618
4619 #ifdef IXGBE_FCOE
4620 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
4621 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
4622 #endif
4623
4624 /* reconfigure the hardware */
4625 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE) {
4626 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
4627 DCB_TX_CONFIG);
4628 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
4629 DCB_RX_CONFIG);
4630 ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
4631 } else if (adapter->ixgbe_ieee_ets && adapter->ixgbe_ieee_pfc) {
4632 ixgbe_dcb_hw_ets(&adapter->hw,
4633 adapter->ixgbe_ieee_ets,
4634 max_frame);
4635 ixgbe_dcb_hw_pfc_config(&adapter->hw,
4636 adapter->ixgbe_ieee_pfc->pfc_en,
4637 adapter->ixgbe_ieee_ets->prio_tc);
4638 }
4639
4640 /* Enable RSS Hash per TC */
4641 if (hw->mac.type != ixgbe_mac_82598EB) {
4642 u32 msb = 0;
4643 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices - 1;
4644
4645 while (rss_i) {
4646 msb++;
4647 rss_i >>= 1;
4648 }
4649
4650 /* write msb to all 8 TCs in one write */
4651 IXGBE_WRITE_REG(hw, IXGBE_RQTC, msb * 0x11111111);
4652 }
4653 }
4654 #endif
4655
4656 /* Additional bittime to account for IXGBE framing */
4657 #define IXGBE_ETH_FRAMING 20
4658
4659 /**
4660 * ixgbe_hpbthresh - calculate high water mark for flow control
4661 *
4662 * @adapter: board private structure to calculate for
4663 * @pb: packet buffer to calculate
4664 */
4665 static int ixgbe_hpbthresh(struct ixgbe_adapter *adapter, int pb)
4666 {
4667 struct ixgbe_hw *hw = &adapter->hw;
4668 struct net_device *dev = adapter->netdev;
4669 int link, tc, kb, marker;
4670 u32 dv_id, rx_pba;
4671
4672 /* Calculate max LAN frame size */
4673 tc = link = dev->mtu + ETH_HLEN + ETH_FCS_LEN + IXGBE_ETH_FRAMING;
4674
4675 #ifdef IXGBE_FCOE
4676 /* FCoE traffic class uses FCOE jumbo frames */
4677 if ((dev->features & NETIF_F_FCOE_MTU) &&
4678 (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
4679 (pb == ixgbe_fcoe_get_tc(adapter)))
4680 tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
4681 #endif
4682
4683 /* Calculate delay value for device */
4684 switch (hw->mac.type) {
4685 case ixgbe_mac_X540:
4686 case ixgbe_mac_X550:
4687 case ixgbe_mac_X550EM_x:
4688 case ixgbe_mac_x550em_a:
4689 dv_id = IXGBE_DV_X540(link, tc);
4690 break;
4691 default:
4692 dv_id = IXGBE_DV(link, tc);
4693 break;
4694 }
4695
4696 /* Loopback switch introduces additional latency */
4697 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4698 dv_id += IXGBE_B2BT(tc);
4699
4700 /* Delay value is calculated in bit times convert to KB */
4701 kb = IXGBE_BT2KB(dv_id);
4702 rx_pba = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(pb)) >> 10;
4703
4704 marker = rx_pba - kb;
4705
4706 /* It is possible that the packet buffer is not large enough
4707 * to provide required headroom. In this case throw an error
4708 * to user and a do the best we can.
4709 */
4710 if (marker < 0) {
4711 e_warn(drv, "Packet Buffer(%i) can not provide enough"
4712 "headroom to support flow control."
4713 "Decrease MTU or number of traffic classes\n", pb);
4714 marker = tc + 1;
4715 }
4716
4717 return marker;
4718 }
4719
4720 /**
4721 * ixgbe_lpbthresh - calculate low water mark for for flow control
4722 *
4723 * @adapter: board private structure to calculate for
4724 * @pb: packet buffer to calculate
4725 */
4726 static int ixgbe_lpbthresh(struct ixgbe_adapter *adapter, int pb)
4727 {
4728 struct ixgbe_hw *hw = &adapter->hw;
4729 struct net_device *dev = adapter->netdev;
4730 int tc;
4731 u32 dv_id;
4732
4733 /* Calculate max LAN frame size */
4734 tc = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
4735
4736 #ifdef IXGBE_FCOE
4737 /* FCoE traffic class uses FCOE jumbo frames */
4738 if ((dev->features & NETIF_F_FCOE_MTU) &&
4739 (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
4740 (pb == netdev_get_prio_tc_map(dev, adapter->fcoe.up)))
4741 tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
4742 #endif
4743
4744 /* Calculate delay value for device */
4745 switch (hw->mac.type) {
4746 case ixgbe_mac_X540:
4747 case ixgbe_mac_X550:
4748 case ixgbe_mac_X550EM_x:
4749 case ixgbe_mac_x550em_a:
4750 dv_id = IXGBE_LOW_DV_X540(tc);
4751 break;
4752 default:
4753 dv_id = IXGBE_LOW_DV(tc);
4754 break;
4755 }
4756
4757 /* Delay value is calculated in bit times convert to KB */
4758 return IXGBE_BT2KB(dv_id);
4759 }
4760
4761 /*
4762 * ixgbe_pbthresh_setup - calculate and setup high low water marks
4763 */
4764 static void ixgbe_pbthresh_setup(struct ixgbe_adapter *adapter)
4765 {
4766 struct ixgbe_hw *hw = &adapter->hw;
4767 int num_tc = netdev_get_num_tc(adapter->netdev);
4768 int i;
4769
4770 if (!num_tc)
4771 num_tc = 1;
4772
4773 for (i = 0; i < num_tc; i++) {
4774 hw->fc.high_water[i] = ixgbe_hpbthresh(adapter, i);
4775 hw->fc.low_water[i] = ixgbe_lpbthresh(adapter, i);
4776
4777 /* Low water marks must not be larger than high water marks */
4778 if (hw->fc.low_water[i] > hw->fc.high_water[i])
4779 hw->fc.low_water[i] = 0;
4780 }
4781
4782 for (; i < MAX_TRAFFIC_CLASS; i++)
4783 hw->fc.high_water[i] = 0;
4784 }
4785
4786 static void ixgbe_configure_pb(struct ixgbe_adapter *adapter)
4787 {
4788 struct ixgbe_hw *hw = &adapter->hw;
4789 int hdrm;
4790 u8 tc = netdev_get_num_tc(adapter->netdev);
4791
4792 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
4793 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
4794 hdrm = 32 << adapter->fdir_pballoc;
4795 else
4796 hdrm = 0;
4797
4798 hw->mac.ops.set_rxpba(hw, tc, hdrm, PBA_STRATEGY_EQUAL);
4799 ixgbe_pbthresh_setup(adapter);
4800 }
4801
4802 static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
4803 {
4804 struct ixgbe_hw *hw = &adapter->hw;
4805 struct hlist_node *node2;
4806 struct ixgbe_fdir_filter *filter;
4807
4808 spin_lock(&adapter->fdir_perfect_lock);
4809
4810 if (!hlist_empty(&adapter->fdir_filter_list))
4811 ixgbe_fdir_set_input_mask_82599(hw, &adapter->fdir_mask);
4812
4813 hlist_for_each_entry_safe(filter, node2,
4814 &adapter->fdir_filter_list, fdir_node) {
4815 ixgbe_fdir_write_perfect_filter_82599(hw,
4816 &filter->filter,
4817 filter->sw_idx,
4818 (filter->action == IXGBE_FDIR_DROP_QUEUE) ?
4819 IXGBE_FDIR_DROP_QUEUE :
4820 adapter->rx_ring[filter->action]->reg_idx);
4821 }
4822
4823 spin_unlock(&adapter->fdir_perfect_lock);
4824 }
4825
4826 static void ixgbe_macvlan_set_rx_mode(struct net_device *dev, unsigned int pool,
4827 struct ixgbe_adapter *adapter)
4828 {
4829 struct ixgbe_hw *hw = &adapter->hw;
4830 u32 vmolr;
4831
4832 /* No unicast promiscuous support for VMDQ devices. */
4833 vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(pool));
4834 vmolr |= (IXGBE_VMOLR_ROMPE | IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE);
4835
4836 /* clear the affected bit */
4837 vmolr &= ~IXGBE_VMOLR_MPE;
4838
4839 if (dev->flags & IFF_ALLMULTI) {
4840 vmolr |= IXGBE_VMOLR_MPE;
4841 } else {
4842 vmolr |= IXGBE_VMOLR_ROMPE;
4843 hw->mac.ops.update_mc_addr_list(hw, dev);
4844 }
4845 ixgbe_write_uc_addr_list(adapter->netdev, pool);
4846 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(pool), vmolr);
4847 }
4848
4849 static void ixgbe_fwd_psrtype(struct ixgbe_fwd_adapter *vadapter)
4850 {
4851 struct ixgbe_adapter *adapter = vadapter->real_adapter;
4852 int rss_i = adapter->num_rx_queues_per_pool;
4853 struct ixgbe_hw *hw = &adapter->hw;
4854 u16 pool = vadapter->pool;
4855 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
4856 IXGBE_PSRTYPE_UDPHDR |
4857 IXGBE_PSRTYPE_IPV4HDR |
4858 IXGBE_PSRTYPE_L2HDR |
4859 IXGBE_PSRTYPE_IPV6HDR;
4860
4861 if (hw->mac.type == ixgbe_mac_82598EB)
4862 return;
4863
4864 if (rss_i > 3)
4865 psrtype |= 2 << 29;
4866 else if (rss_i > 1)
4867 psrtype |= 1 << 29;
4868
4869 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(VMDQ_P(pool)), psrtype);
4870 }
4871
4872 /**
4873 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
4874 * @rx_ring: ring to free buffers from
4875 **/
4876 static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring)
4877 {
4878 struct device *dev = rx_ring->dev;
4879 unsigned long size;
4880 u16 i;
4881
4882 /* ring already cleared, nothing to do */
4883 if (!rx_ring->rx_buffer_info)
4884 return;
4885
4886 /* Free all the Rx ring sk_buffs */
4887 for (i = 0; i < rx_ring->count; i++) {
4888 struct ixgbe_rx_buffer *rx_buffer = &rx_ring->rx_buffer_info[i];
4889
4890 if (rx_buffer->skb) {
4891 struct sk_buff *skb = rx_buffer->skb;
4892 if (IXGBE_CB(skb)->page_released)
4893 dma_unmap_page(dev,
4894 IXGBE_CB(skb)->dma,
4895 ixgbe_rx_bufsz(rx_ring),
4896 DMA_FROM_DEVICE);
4897 dev_kfree_skb(skb);
4898 rx_buffer->skb = NULL;
4899 }
4900
4901 if (!rx_buffer->page)
4902 continue;
4903
4904 dma_unmap_page(dev, rx_buffer->dma,
4905 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
4906 __free_pages(rx_buffer->page, ixgbe_rx_pg_order(rx_ring));
4907
4908 rx_buffer->page = NULL;
4909 }
4910
4911 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4912 memset(rx_ring->rx_buffer_info, 0, size);
4913
4914 /* Zero out the descriptor ring */
4915 memset(rx_ring->desc, 0, rx_ring->size);
4916
4917 rx_ring->next_to_alloc = 0;
4918 rx_ring->next_to_clean = 0;
4919 rx_ring->next_to_use = 0;
4920 }
4921
4922 static void ixgbe_disable_fwd_ring(struct ixgbe_fwd_adapter *vadapter,
4923 struct ixgbe_ring *rx_ring)
4924 {
4925 struct ixgbe_adapter *adapter = vadapter->real_adapter;
4926 int index = rx_ring->queue_index + vadapter->rx_base_queue;
4927
4928 /* shutdown specific queue receive and wait for dma to settle */
4929 ixgbe_disable_rx_queue(adapter, rx_ring);
4930 usleep_range(10000, 20000);
4931 ixgbe_irq_disable_queues(adapter, ((u64)1 << index));
4932 ixgbe_clean_rx_ring(rx_ring);
4933 rx_ring->l2_accel_priv = NULL;
4934 }
4935
4936 static int ixgbe_fwd_ring_down(struct net_device *vdev,
4937 struct ixgbe_fwd_adapter *accel)
4938 {
4939 struct ixgbe_adapter *adapter = accel->real_adapter;
4940 unsigned int rxbase = accel->rx_base_queue;
4941 unsigned int txbase = accel->tx_base_queue;
4942 int i;
4943
4944 netif_tx_stop_all_queues(vdev);
4945
4946 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4947 ixgbe_disable_fwd_ring(accel, adapter->rx_ring[rxbase + i]);
4948 adapter->rx_ring[rxbase + i]->netdev = adapter->netdev;
4949 }
4950
4951 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4952 adapter->tx_ring[txbase + i]->l2_accel_priv = NULL;
4953 adapter->tx_ring[txbase + i]->netdev = adapter->netdev;
4954 }
4955
4956
4957 return 0;
4958 }
4959
4960 static int ixgbe_fwd_ring_up(struct net_device *vdev,
4961 struct ixgbe_fwd_adapter *accel)
4962 {
4963 struct ixgbe_adapter *adapter = accel->real_adapter;
4964 unsigned int rxbase, txbase, queues;
4965 int i, baseq, err = 0;
4966
4967 if (!test_bit(accel->pool, &adapter->fwd_bitmask))
4968 return 0;
4969
4970 baseq = accel->pool * adapter->num_rx_queues_per_pool;
4971 netdev_dbg(vdev, "pool %i:%i queues %i:%i VSI bitmask %lx\n",
4972 accel->pool, adapter->num_rx_pools,
4973 baseq, baseq + adapter->num_rx_queues_per_pool,
4974 adapter->fwd_bitmask);
4975
4976 accel->netdev = vdev;
4977 accel->rx_base_queue = rxbase = baseq;
4978 accel->tx_base_queue = txbase = baseq;
4979
4980 for (i = 0; i < adapter->num_rx_queues_per_pool; i++)
4981 ixgbe_disable_fwd_ring(accel, adapter->rx_ring[rxbase + i]);
4982
4983 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4984 adapter->rx_ring[rxbase + i]->netdev = vdev;
4985 adapter->rx_ring[rxbase + i]->l2_accel_priv = accel;
4986 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[rxbase + i]);
4987 }
4988
4989 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4990 adapter->tx_ring[txbase + i]->netdev = vdev;
4991 adapter->tx_ring[txbase + i]->l2_accel_priv = accel;
4992 }
4993
4994 queues = min_t(unsigned int,
4995 adapter->num_rx_queues_per_pool, vdev->num_tx_queues);
4996 err = netif_set_real_num_tx_queues(vdev, queues);
4997 if (err)
4998 goto fwd_queue_err;
4999
5000 err = netif_set_real_num_rx_queues(vdev, queues);
5001 if (err)
5002 goto fwd_queue_err;
5003
5004 if (is_valid_ether_addr(vdev->dev_addr))
5005 ixgbe_add_mac_filter(adapter, vdev->dev_addr, accel->pool);
5006
5007 ixgbe_fwd_psrtype(accel);
5008 ixgbe_macvlan_set_rx_mode(vdev, accel->pool, adapter);
5009 return err;
5010 fwd_queue_err:
5011 ixgbe_fwd_ring_down(vdev, accel);
5012 return err;
5013 }
5014
5015 static void ixgbe_configure_dfwd(struct ixgbe_adapter *adapter)
5016 {
5017 struct net_device *upper;
5018 struct list_head *iter;
5019 int err;
5020
5021 netdev_for_each_all_upper_dev_rcu(adapter->netdev, upper, iter) {
5022 if (netif_is_macvlan(upper)) {
5023 struct macvlan_dev *dfwd = netdev_priv(upper);
5024 struct ixgbe_fwd_adapter *vadapter = dfwd->fwd_priv;
5025
5026 if (dfwd->fwd_priv) {
5027 err = ixgbe_fwd_ring_up(upper, vadapter);
5028 if (err)
5029 continue;
5030 }
5031 }
5032 }
5033 }
5034
5035 static void ixgbe_configure(struct ixgbe_adapter *adapter)
5036 {
5037 struct ixgbe_hw *hw = &adapter->hw;
5038
5039 ixgbe_configure_pb(adapter);
5040 #ifdef CONFIG_IXGBE_DCB
5041 ixgbe_configure_dcb(adapter);
5042 #endif
5043 /*
5044 * We must restore virtualization before VLANs or else
5045 * the VLVF registers will not be populated
5046 */
5047 ixgbe_configure_virtualization(adapter);
5048
5049 ixgbe_set_rx_mode(adapter->netdev);
5050 ixgbe_restore_vlan(adapter);
5051
5052 switch (hw->mac.type) {
5053 case ixgbe_mac_82599EB:
5054 case ixgbe_mac_X540:
5055 hw->mac.ops.disable_rx_buff(hw);
5056 break;
5057 default:
5058 break;
5059 }
5060
5061 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
5062 ixgbe_init_fdir_signature_82599(&adapter->hw,
5063 adapter->fdir_pballoc);
5064 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
5065 ixgbe_init_fdir_perfect_82599(&adapter->hw,
5066 adapter->fdir_pballoc);
5067 ixgbe_fdir_filter_restore(adapter);
5068 }
5069
5070 switch (hw->mac.type) {
5071 case ixgbe_mac_82599EB:
5072 case ixgbe_mac_X540:
5073 hw->mac.ops.enable_rx_buff(hw);
5074 break;
5075 default:
5076 break;
5077 }
5078
5079 #ifdef CONFIG_IXGBE_DCA
5080 /* configure DCA */
5081 if (adapter->flags & IXGBE_FLAG_DCA_CAPABLE)
5082 ixgbe_setup_dca(adapter);
5083 #endif /* CONFIG_IXGBE_DCA */
5084
5085 #ifdef IXGBE_FCOE
5086 /* configure FCoE L2 filters, redirection table, and Rx control */
5087 ixgbe_configure_fcoe(adapter);
5088
5089 #endif /* IXGBE_FCOE */
5090 ixgbe_configure_tx(adapter);
5091 ixgbe_configure_rx(adapter);
5092 ixgbe_configure_dfwd(adapter);
5093 }
5094
5095 /**
5096 * ixgbe_sfp_link_config - set up SFP+ link
5097 * @adapter: pointer to private adapter struct
5098 **/
5099 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
5100 {
5101 /*
5102 * We are assuming the worst case scenario here, and that
5103 * is that an SFP was inserted/removed after the reset
5104 * but before SFP detection was enabled. As such the best
5105 * solution is to just start searching as soon as we start
5106 */
5107 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
5108 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
5109
5110 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
5111 adapter->sfp_poll_time = 0;
5112 }
5113
5114 /**
5115 * ixgbe_non_sfp_link_config - set up non-SFP+ link
5116 * @hw: pointer to private hardware struct
5117 *
5118 * Returns 0 on success, negative on failure
5119 **/
5120 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
5121 {
5122 u32 speed;
5123 bool autoneg, link_up = false;
5124 int ret = IXGBE_ERR_LINK_SETUP;
5125
5126 if (hw->mac.ops.check_link)
5127 ret = hw->mac.ops.check_link(hw, &speed, &link_up, false);
5128
5129 if (ret)
5130 return ret;
5131
5132 speed = hw->phy.autoneg_advertised;
5133 if ((!speed) && (hw->mac.ops.get_link_capabilities))
5134 ret = hw->mac.ops.get_link_capabilities(hw, &speed,
5135 &autoneg);
5136 if (ret)
5137 return ret;
5138
5139 if (hw->mac.ops.setup_link)
5140 ret = hw->mac.ops.setup_link(hw, speed, link_up);
5141
5142 return ret;
5143 }
5144
5145 static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
5146 {
5147 struct ixgbe_hw *hw = &adapter->hw;
5148 u32 gpie = 0;
5149
5150 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
5151 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
5152 IXGBE_GPIE_OCD;
5153 gpie |= IXGBE_GPIE_EIAME;
5154 /*
5155 * use EIAM to auto-mask when MSI-X interrupt is asserted
5156 * this saves a register write for every interrupt
5157 */
5158 switch (hw->mac.type) {
5159 case ixgbe_mac_82598EB:
5160 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
5161 break;
5162 case ixgbe_mac_82599EB:
5163 case ixgbe_mac_X540:
5164 case ixgbe_mac_X550:
5165 case ixgbe_mac_X550EM_x:
5166 case ixgbe_mac_x550em_a:
5167 default:
5168 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
5169 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
5170 break;
5171 }
5172 } else {
5173 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
5174 * specifically only auto mask tx and rx interrupts */
5175 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
5176 }
5177
5178 /* XXX: to interrupt immediately for EICS writes, enable this */
5179 /* gpie |= IXGBE_GPIE_EIMEN; */
5180
5181 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
5182 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
5183
5184 switch (adapter->ring_feature[RING_F_VMDQ].mask) {
5185 case IXGBE_82599_VMDQ_8Q_MASK:
5186 gpie |= IXGBE_GPIE_VTMODE_16;
5187 break;
5188 case IXGBE_82599_VMDQ_4Q_MASK:
5189 gpie |= IXGBE_GPIE_VTMODE_32;
5190 break;
5191 default:
5192 gpie |= IXGBE_GPIE_VTMODE_64;
5193 break;
5194 }
5195 }
5196
5197 /* Enable Thermal over heat sensor interrupt */
5198 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
5199 switch (adapter->hw.mac.type) {
5200 case ixgbe_mac_82599EB:
5201 gpie |= IXGBE_SDP0_GPIEN_8259X;
5202 break;
5203 default:
5204 break;
5205 }
5206 }
5207
5208 /* Enable fan failure interrupt */
5209 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
5210 gpie |= IXGBE_SDP1_GPIEN(hw);
5211
5212 switch (hw->mac.type) {
5213 case ixgbe_mac_82599EB:
5214 gpie |= IXGBE_SDP1_GPIEN_8259X | IXGBE_SDP2_GPIEN_8259X;
5215 break;
5216 case ixgbe_mac_X550EM_x:
5217 case ixgbe_mac_x550em_a:
5218 gpie |= IXGBE_SDP0_GPIEN_X540;
5219 break;
5220 default:
5221 break;
5222 }
5223
5224 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
5225 }
5226
5227 static void ixgbe_up_complete(struct ixgbe_adapter *adapter)
5228 {
5229 struct ixgbe_hw *hw = &adapter->hw;
5230 int err;
5231 u32 ctrl_ext;
5232
5233 ixgbe_get_hw_control(adapter);
5234 ixgbe_setup_gpie(adapter);
5235
5236 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
5237 ixgbe_configure_msix(adapter);
5238 else
5239 ixgbe_configure_msi_and_legacy(adapter);
5240
5241 /* enable the optics for 82599 SFP+ fiber */
5242 if (hw->mac.ops.enable_tx_laser)
5243 hw->mac.ops.enable_tx_laser(hw);
5244
5245 if (hw->phy.ops.set_phy_power)
5246 hw->phy.ops.set_phy_power(hw, true);
5247
5248 smp_mb__before_atomic();
5249 clear_bit(__IXGBE_DOWN, &adapter->state);
5250 ixgbe_napi_enable_all(adapter);
5251
5252 if (ixgbe_is_sfp(hw)) {
5253 ixgbe_sfp_link_config(adapter);
5254 } else {
5255 err = ixgbe_non_sfp_link_config(hw);
5256 if (err)
5257 e_err(probe, "link_config FAILED %d\n", err);
5258 }
5259
5260 /* clear any pending interrupts, may auto mask */
5261 IXGBE_READ_REG(hw, IXGBE_EICR);
5262 ixgbe_irq_enable(adapter, true, true);
5263
5264 /*
5265 * If this adapter has a fan, check to see if we had a failure
5266 * before we enabled the interrupt.
5267 */
5268 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
5269 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
5270 if (esdp & IXGBE_ESDP_SDP1)
5271 e_crit(drv, "Fan has stopped, replace the adapter\n");
5272 }
5273
5274 /* bring the link up in the watchdog, this could race with our first
5275 * link up interrupt but shouldn't be a problem */
5276 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
5277 adapter->link_check_timeout = jiffies;
5278 mod_timer(&adapter->service_timer, jiffies);
5279
5280 /* Set PF Reset Done bit so PF/VF Mail Ops can work */
5281 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
5282 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
5283 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
5284 }
5285
5286 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
5287 {
5288 WARN_ON(in_interrupt());
5289 /* put off any impending NetWatchDogTimeout */
5290 adapter->netdev->trans_start = jiffies;
5291
5292 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
5293 usleep_range(1000, 2000);
5294 ixgbe_down(adapter);
5295 /*
5296 * If SR-IOV enabled then wait a bit before bringing the adapter
5297 * back up to give the VFs time to respond to the reset. The
5298 * two second wait is based upon the watchdog timer cycle in
5299 * the VF driver.
5300 */
5301 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
5302 msleep(2000);
5303 ixgbe_up(adapter);
5304 clear_bit(__IXGBE_RESETTING, &adapter->state);
5305 }
5306
5307 void ixgbe_up(struct ixgbe_adapter *adapter)
5308 {
5309 /* hardware has been reset, we need to reload some things */
5310 ixgbe_configure(adapter);
5311
5312 ixgbe_up_complete(adapter);
5313 }
5314
5315 void ixgbe_reset(struct ixgbe_adapter *adapter)
5316 {
5317 struct ixgbe_hw *hw = &adapter->hw;
5318 struct net_device *netdev = adapter->netdev;
5319 int err;
5320
5321 if (ixgbe_removed(hw->hw_addr))
5322 return;
5323 /* lock SFP init bit to prevent race conditions with the watchdog */
5324 while (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
5325 usleep_range(1000, 2000);
5326
5327 /* clear all SFP and link config related flags while holding SFP_INIT */
5328 adapter->flags2 &= ~(IXGBE_FLAG2_SEARCH_FOR_SFP |
5329 IXGBE_FLAG2_SFP_NEEDS_RESET);
5330 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
5331
5332 err = hw->mac.ops.init_hw(hw);
5333 switch (err) {
5334 case 0:
5335 case IXGBE_ERR_SFP_NOT_PRESENT:
5336 case IXGBE_ERR_SFP_NOT_SUPPORTED:
5337 break;
5338 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
5339 e_dev_err("master disable timed out\n");
5340 break;
5341 case IXGBE_ERR_EEPROM_VERSION:
5342 /* We are running on a pre-production device, log a warning */
5343 e_dev_warn("This device is a pre-production adapter/LOM. "
5344 "Please be aware there may be issues associated with "
5345 "your hardware. If you are experiencing problems "
5346 "please contact your Intel or hardware "
5347 "representative who provided you with this "
5348 "hardware.\n");
5349 break;
5350 default:
5351 e_dev_err("Hardware Error: %d\n", err);
5352 }
5353
5354 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
5355
5356 /* flush entries out of MAC table */
5357 ixgbe_flush_sw_mac_table(adapter);
5358 __dev_uc_unsync(netdev, NULL);
5359
5360 /* do not flush user set addresses */
5361 ixgbe_mac_set_default_filter(adapter);
5362
5363 /* update SAN MAC vmdq pool selection */
5364 if (hw->mac.san_mac_rar_index)
5365 hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));
5366
5367 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
5368 ixgbe_ptp_reset(adapter);
5369
5370 if (hw->phy.ops.set_phy_power) {
5371 if (!netif_running(adapter->netdev) && !adapter->wol)
5372 hw->phy.ops.set_phy_power(hw, false);
5373 else
5374 hw->phy.ops.set_phy_power(hw, true);
5375 }
5376 }
5377
5378 /**
5379 * ixgbe_clean_tx_ring - Free Tx Buffers
5380 * @tx_ring: ring to be cleaned
5381 **/
5382 static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
5383 {
5384 struct ixgbe_tx_buffer *tx_buffer_info;
5385 unsigned long size;
5386 u16 i;
5387
5388 /* ring already cleared, nothing to do */
5389 if (!tx_ring->tx_buffer_info)
5390 return;
5391
5392 /* Free all the Tx ring sk_buffs */
5393 for (i = 0; i < tx_ring->count; i++) {
5394 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5395 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
5396 }
5397
5398 netdev_tx_reset_queue(txring_txq(tx_ring));
5399
5400 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
5401 memset(tx_ring->tx_buffer_info, 0, size);
5402
5403 /* Zero out the descriptor ring */
5404 memset(tx_ring->desc, 0, tx_ring->size);
5405
5406 tx_ring->next_to_use = 0;
5407 tx_ring->next_to_clean = 0;
5408 }
5409
5410 /**
5411 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
5412 * @adapter: board private structure
5413 **/
5414 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
5415 {
5416 int i;
5417
5418 for (i = 0; i < adapter->num_rx_queues; i++)
5419 ixgbe_clean_rx_ring(adapter->rx_ring[i]);
5420 }
5421
5422 /**
5423 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
5424 * @adapter: board private structure
5425 **/
5426 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
5427 {
5428 int i;
5429
5430 for (i = 0; i < adapter->num_tx_queues; i++)
5431 ixgbe_clean_tx_ring(adapter->tx_ring[i]);
5432 }
5433
5434 static void ixgbe_fdir_filter_exit(struct ixgbe_adapter *adapter)
5435 {
5436 struct hlist_node *node2;
5437 struct ixgbe_fdir_filter *filter;
5438
5439 spin_lock(&adapter->fdir_perfect_lock);
5440
5441 hlist_for_each_entry_safe(filter, node2,
5442 &adapter->fdir_filter_list, fdir_node) {
5443 hlist_del(&filter->fdir_node);
5444 kfree(filter);
5445 }
5446 adapter->fdir_filter_count = 0;
5447
5448 spin_unlock(&adapter->fdir_perfect_lock);
5449 }
5450
5451 void ixgbe_down(struct ixgbe_adapter *adapter)
5452 {
5453 struct net_device *netdev = adapter->netdev;
5454 struct ixgbe_hw *hw = &adapter->hw;
5455 struct net_device *upper;
5456 struct list_head *iter;
5457 int i;
5458
5459 /* signal that we are down to the interrupt handler */
5460 if (test_and_set_bit(__IXGBE_DOWN, &adapter->state))
5461 return; /* do nothing if already down */
5462
5463 /* disable receives */
5464 hw->mac.ops.disable_rx(hw);
5465
5466 /* disable all enabled rx queues */
5467 for (i = 0; i < adapter->num_rx_queues; i++)
5468 /* this call also flushes the previous write */
5469 ixgbe_disable_rx_queue(adapter, adapter->rx_ring[i]);
5470
5471 usleep_range(10000, 20000);
5472
5473 netif_tx_stop_all_queues(netdev);
5474
5475 /* call carrier off first to avoid false dev_watchdog timeouts */
5476 netif_carrier_off(netdev);
5477 netif_tx_disable(netdev);
5478
5479 /* disable any upper devices */
5480 netdev_for_each_all_upper_dev_rcu(adapter->netdev, upper, iter) {
5481 if (netif_is_macvlan(upper)) {
5482 struct macvlan_dev *vlan = netdev_priv(upper);
5483
5484 if (vlan->fwd_priv) {
5485 netif_tx_stop_all_queues(upper);
5486 netif_carrier_off(upper);
5487 netif_tx_disable(upper);
5488 }
5489 }
5490 }
5491
5492 ixgbe_irq_disable(adapter);
5493
5494 ixgbe_napi_disable_all(adapter);
5495
5496 adapter->flags2 &= ~(IXGBE_FLAG2_FDIR_REQUIRES_REINIT |
5497 IXGBE_FLAG2_RESET_REQUESTED);
5498 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5499
5500 del_timer_sync(&adapter->service_timer);
5501
5502 if (adapter->num_vfs) {
5503 /* Clear EITR Select mapping */
5504 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
5505
5506 /* Mark all the VFs as inactive */
5507 for (i = 0 ; i < adapter->num_vfs; i++)
5508 adapter->vfinfo[i].clear_to_send = false;
5509
5510 /* ping all the active vfs to let them know we are going down */
5511 ixgbe_ping_all_vfs(adapter);
5512
5513 /* Disable all VFTE/VFRE TX/RX */
5514 ixgbe_disable_tx_rx(adapter);
5515 }
5516
5517 /* disable transmits in the hardware now that interrupts are off */
5518 for (i = 0; i < adapter->num_tx_queues; i++) {
5519 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
5520 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
5521 }
5522
5523 /* Disable the Tx DMA engine on 82599 and later MAC */
5524 switch (hw->mac.type) {
5525 case ixgbe_mac_82599EB:
5526 case ixgbe_mac_X540:
5527 case ixgbe_mac_X550:
5528 case ixgbe_mac_X550EM_x:
5529 case ixgbe_mac_x550em_a:
5530 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
5531 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
5532 ~IXGBE_DMATXCTL_TE));
5533 break;
5534 default:
5535 break;
5536 }
5537
5538 if (!pci_channel_offline(adapter->pdev))
5539 ixgbe_reset(adapter);
5540
5541 /* power down the optics for 82599 SFP+ fiber */
5542 if (hw->mac.ops.disable_tx_laser)
5543 hw->mac.ops.disable_tx_laser(hw);
5544
5545 ixgbe_clean_all_tx_rings(adapter);
5546 ixgbe_clean_all_rx_rings(adapter);
5547 }
5548
5549 /**
5550 * ixgbe_tx_timeout - Respond to a Tx Hang
5551 * @netdev: network interface device structure
5552 **/
5553 static void ixgbe_tx_timeout(struct net_device *netdev)
5554 {
5555 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5556
5557 /* Do the reset outside of interrupt context */
5558 ixgbe_tx_timeout_reset(adapter);
5559 }
5560
5561 /**
5562 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
5563 * @adapter: board private structure to initialize
5564 *
5565 * ixgbe_sw_init initializes the Adapter private data structure.
5566 * Fields are initialized based on PCI device information and
5567 * OS network device settings (MTU size).
5568 **/
5569 static int ixgbe_sw_init(struct ixgbe_adapter *adapter)
5570 {
5571 struct ixgbe_hw *hw = &adapter->hw;
5572 struct pci_dev *pdev = adapter->pdev;
5573 unsigned int rss, fdir;
5574 u32 fwsm;
5575 u16 device_caps;
5576 #ifdef CONFIG_IXGBE_DCB
5577 int j;
5578 struct tc_configuration *tc;
5579 #endif
5580
5581 /* PCI config space info */
5582
5583 hw->vendor_id = pdev->vendor;
5584 hw->device_id = pdev->device;
5585 hw->revision_id = pdev->revision;
5586 hw->subsystem_vendor_id = pdev->subsystem_vendor;
5587 hw->subsystem_device_id = pdev->subsystem_device;
5588
5589 /* Set common capability flags and settings */
5590 rss = min_t(int, ixgbe_max_rss_indices(adapter), num_online_cpus());
5591 adapter->ring_feature[RING_F_RSS].limit = rss;
5592 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
5593 adapter->max_q_vectors = MAX_Q_VECTORS_82599;
5594 adapter->atr_sample_rate = 20;
5595 fdir = min_t(int, IXGBE_MAX_FDIR_INDICES, num_online_cpus());
5596 adapter->ring_feature[RING_F_FDIR].limit = fdir;
5597 adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_64K;
5598 #ifdef CONFIG_IXGBE_DCA
5599 adapter->flags |= IXGBE_FLAG_DCA_CAPABLE;
5600 #endif
5601 #ifdef IXGBE_FCOE
5602 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
5603 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
5604 #ifdef CONFIG_IXGBE_DCB
5605 /* Default traffic class to use for FCoE */
5606 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
5607 #endif /* CONFIG_IXGBE_DCB */
5608 #endif /* IXGBE_FCOE */
5609
5610 /* initialize static ixgbe jump table entries */
5611 adapter->jump_tables[0] = ixgbe_ipv4_fields;
5612
5613 adapter->mac_table = kzalloc(sizeof(struct ixgbe_mac_addr) *
5614 hw->mac.num_rar_entries,
5615 GFP_ATOMIC);
5616 if (!adapter->mac_table)
5617 return -ENOMEM;
5618
5619 /* Set MAC specific capability flags and exceptions */
5620 switch (hw->mac.type) {
5621 case ixgbe_mac_82598EB:
5622 adapter->flags2 &= ~IXGBE_FLAG2_RSC_CAPABLE;
5623
5624 if (hw->device_id == IXGBE_DEV_ID_82598AT)
5625 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
5626
5627 adapter->max_q_vectors = MAX_Q_VECTORS_82598;
5628 adapter->ring_feature[RING_F_FDIR].limit = 0;
5629 adapter->atr_sample_rate = 0;
5630 adapter->fdir_pballoc = 0;
5631 #ifdef IXGBE_FCOE
5632 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
5633 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
5634 #ifdef CONFIG_IXGBE_DCB
5635 adapter->fcoe.up = 0;
5636 #endif /* IXGBE_DCB */
5637 #endif /* IXGBE_FCOE */
5638 break;
5639 case ixgbe_mac_82599EB:
5640 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
5641 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
5642 break;
5643 case ixgbe_mac_X540:
5644 fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM(hw));
5645 if (fwsm & IXGBE_FWSM_TS_ENABLED)
5646 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
5647 break;
5648 case ixgbe_mac_X550EM_x:
5649 case ixgbe_mac_x550em_a:
5650 case ixgbe_mac_X550:
5651 #ifdef CONFIG_IXGBE_DCA
5652 adapter->flags &= ~IXGBE_FLAG_DCA_CAPABLE;
5653 #endif
5654 #ifdef CONFIG_IXGBE_VXLAN
5655 adapter->flags |= IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE;
5656 #endif
5657 break;
5658 default:
5659 break;
5660 }
5661
5662 #ifdef IXGBE_FCOE
5663 /* FCoE support exists, always init the FCoE lock */
5664 spin_lock_init(&adapter->fcoe.lock);
5665
5666 #endif
5667 /* n-tuple support exists, always init our spinlock */
5668 spin_lock_init(&adapter->fdir_perfect_lock);
5669
5670 #ifdef CONFIG_IXGBE_DCB
5671 switch (hw->mac.type) {
5672 case ixgbe_mac_X540:
5673 case ixgbe_mac_X550:
5674 case ixgbe_mac_X550EM_x:
5675 case ixgbe_mac_x550em_a:
5676 adapter->dcb_cfg.num_tcs.pg_tcs = X540_TRAFFIC_CLASS;
5677 adapter->dcb_cfg.num_tcs.pfc_tcs = X540_TRAFFIC_CLASS;
5678 break;
5679 default:
5680 adapter->dcb_cfg.num_tcs.pg_tcs = MAX_TRAFFIC_CLASS;
5681 adapter->dcb_cfg.num_tcs.pfc_tcs = MAX_TRAFFIC_CLASS;
5682 break;
5683 }
5684
5685 /* Configure DCB traffic classes */
5686 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
5687 tc = &adapter->dcb_cfg.tc_config[j];
5688 tc->path[DCB_TX_CONFIG].bwg_id = 0;
5689 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
5690 tc->path[DCB_RX_CONFIG].bwg_id = 0;
5691 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
5692 tc->dcb_pfc = pfc_disabled;
5693 }
5694
5695 /* Initialize default user to priority mapping, UPx->TC0 */
5696 tc = &adapter->dcb_cfg.tc_config[0];
5697 tc->path[DCB_TX_CONFIG].up_to_tc_bitmap = 0xFF;
5698 tc->path[DCB_RX_CONFIG].up_to_tc_bitmap = 0xFF;
5699
5700 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
5701 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
5702 adapter->dcb_cfg.pfc_mode_enable = false;
5703 adapter->dcb_set_bitmap = 0x00;
5704 adapter->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE;
5705 memcpy(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
5706 sizeof(adapter->temp_dcb_cfg));
5707
5708 #endif
5709
5710 /* default flow control settings */
5711 hw->fc.requested_mode = ixgbe_fc_full;
5712 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
5713 ixgbe_pbthresh_setup(adapter);
5714 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
5715 hw->fc.send_xon = true;
5716 hw->fc.disable_fc_autoneg = ixgbe_device_supports_autoneg_fc(hw);
5717
5718 #ifdef CONFIG_PCI_IOV
5719 if (max_vfs > 0)
5720 e_dev_warn("Enabling SR-IOV VFs using the max_vfs module parameter is deprecated - please use the pci sysfs interface instead.\n");
5721
5722 /* assign number of SR-IOV VFs */
5723 if (hw->mac.type != ixgbe_mac_82598EB) {
5724 if (max_vfs > IXGBE_MAX_VFS_DRV_LIMIT) {
5725 adapter->num_vfs = 0;
5726 e_dev_warn("max_vfs parameter out of range. Not assigning any SR-IOV VFs\n");
5727 } else {
5728 adapter->num_vfs = max_vfs;
5729 }
5730 }
5731 #endif /* CONFIG_PCI_IOV */
5732
5733 /* enable itr by default in dynamic mode */
5734 adapter->rx_itr_setting = 1;
5735 adapter->tx_itr_setting = 1;
5736
5737 /* set default ring sizes */
5738 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
5739 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
5740
5741 /* Cache bit indicating need for crosstalk fix */
5742 switch (hw->mac.type) {
5743 case ixgbe_mac_82599EB:
5744 case ixgbe_mac_X550EM_x:
5745 case ixgbe_mac_x550em_a:
5746 hw->mac.ops.get_device_caps(hw, &device_caps);
5747 if (device_caps & IXGBE_DEVICE_CAPS_NO_CROSSTALK_WR)
5748 adapter->need_crosstalk_fix = false;
5749 else
5750 adapter->need_crosstalk_fix = true;
5751 break;
5752 default:
5753 adapter->need_crosstalk_fix = false;
5754 break;
5755 }
5756
5757 /* set default work limits */
5758 adapter->tx_work_limit = IXGBE_DEFAULT_TX_WORK;
5759
5760 /* initialize eeprom parameters */
5761 if (ixgbe_init_eeprom_params_generic(hw)) {
5762 e_dev_err("EEPROM initialization failed\n");
5763 return -EIO;
5764 }
5765
5766 /* PF holds first pool slot */
5767 set_bit(0, &adapter->fwd_bitmask);
5768 set_bit(__IXGBE_DOWN, &adapter->state);
5769
5770 return 0;
5771 }
5772
5773 /**
5774 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
5775 * @tx_ring: tx descriptor ring (for a specific queue) to setup
5776 *
5777 * Return 0 on success, negative on failure
5778 **/
5779 int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
5780 {
5781 struct device *dev = tx_ring->dev;
5782 int orig_node = dev_to_node(dev);
5783 int ring_node = -1;
5784 int size;
5785
5786 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
5787
5788 if (tx_ring->q_vector)
5789 ring_node = tx_ring->q_vector->numa_node;
5790
5791 tx_ring->tx_buffer_info = vzalloc_node(size, ring_node);
5792 if (!tx_ring->tx_buffer_info)
5793 tx_ring->tx_buffer_info = vzalloc(size);
5794 if (!tx_ring->tx_buffer_info)
5795 goto err;
5796
5797 u64_stats_init(&tx_ring->syncp);
5798
5799 /* round up to nearest 4K */
5800 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
5801 tx_ring->size = ALIGN(tx_ring->size, 4096);
5802
5803 set_dev_node(dev, ring_node);
5804 tx_ring->desc = dma_alloc_coherent(dev,
5805 tx_ring->size,
5806 &tx_ring->dma,
5807 GFP_KERNEL);
5808 set_dev_node(dev, orig_node);
5809 if (!tx_ring->desc)
5810 tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
5811 &tx_ring->dma, GFP_KERNEL);
5812 if (!tx_ring->desc)
5813 goto err;
5814
5815 tx_ring->next_to_use = 0;
5816 tx_ring->next_to_clean = 0;
5817 return 0;
5818
5819 err:
5820 vfree(tx_ring->tx_buffer_info);
5821 tx_ring->tx_buffer_info = NULL;
5822 dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n");
5823 return -ENOMEM;
5824 }
5825
5826 /**
5827 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
5828 * @adapter: board private structure
5829 *
5830 * If this function returns with an error, then it's possible one or
5831 * more of the rings is populated (while the rest are not). It is the
5832 * callers duty to clean those orphaned rings.
5833 *
5834 * Return 0 on success, negative on failure
5835 **/
5836 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
5837 {
5838 int i, err = 0;
5839
5840 for (i = 0; i < adapter->num_tx_queues; i++) {
5841 err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
5842 if (!err)
5843 continue;
5844
5845 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
5846 goto err_setup_tx;
5847 }
5848
5849 return 0;
5850 err_setup_tx:
5851 /* rewind the index freeing the rings as we go */
5852 while (i--)
5853 ixgbe_free_tx_resources(adapter->tx_ring[i]);
5854 return err;
5855 }
5856
5857 /**
5858 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
5859 * @rx_ring: rx descriptor ring (for a specific queue) to setup
5860 *
5861 * Returns 0 on success, negative on failure
5862 **/
5863 int ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring)
5864 {
5865 struct device *dev = rx_ring->dev;
5866 int orig_node = dev_to_node(dev);
5867 int ring_node = -1;
5868 int size;
5869
5870 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
5871
5872 if (rx_ring->q_vector)
5873 ring_node = rx_ring->q_vector->numa_node;
5874
5875 rx_ring->rx_buffer_info = vzalloc_node(size, ring_node);
5876 if (!rx_ring->rx_buffer_info)
5877 rx_ring->rx_buffer_info = vzalloc(size);
5878 if (!rx_ring->rx_buffer_info)
5879 goto err;
5880
5881 u64_stats_init(&rx_ring->syncp);
5882
5883 /* Round up to nearest 4K */
5884 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
5885 rx_ring->size = ALIGN(rx_ring->size, 4096);
5886
5887 set_dev_node(dev, ring_node);
5888 rx_ring->desc = dma_alloc_coherent(dev,
5889 rx_ring->size,
5890 &rx_ring->dma,
5891 GFP_KERNEL);
5892 set_dev_node(dev, orig_node);
5893 if (!rx_ring->desc)
5894 rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
5895 &rx_ring->dma, GFP_KERNEL);
5896 if (!rx_ring->desc)
5897 goto err;
5898
5899 rx_ring->next_to_clean = 0;
5900 rx_ring->next_to_use = 0;
5901
5902 return 0;
5903 err:
5904 vfree(rx_ring->rx_buffer_info);
5905 rx_ring->rx_buffer_info = NULL;
5906 dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");
5907 return -ENOMEM;
5908 }
5909
5910 /**
5911 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
5912 * @adapter: board private structure
5913 *
5914 * If this function returns with an error, then it's possible one or
5915 * more of the rings is populated (while the rest are not). It is the
5916 * callers duty to clean those orphaned rings.
5917 *
5918 * Return 0 on success, negative on failure
5919 **/
5920 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
5921 {
5922 int i, err = 0;
5923
5924 for (i = 0; i < adapter->num_rx_queues; i++) {
5925 err = ixgbe_setup_rx_resources(adapter->rx_ring[i]);
5926 if (!err)
5927 continue;
5928
5929 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
5930 goto err_setup_rx;
5931 }
5932
5933 #ifdef IXGBE_FCOE
5934 err = ixgbe_setup_fcoe_ddp_resources(adapter);
5935 if (!err)
5936 #endif
5937 return 0;
5938 err_setup_rx:
5939 /* rewind the index freeing the rings as we go */
5940 while (i--)
5941 ixgbe_free_rx_resources(adapter->rx_ring[i]);
5942 return err;
5943 }
5944
5945 /**
5946 * ixgbe_free_tx_resources - Free Tx Resources per Queue
5947 * @tx_ring: Tx descriptor ring for a specific queue
5948 *
5949 * Free all transmit software resources
5950 **/
5951 void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring)
5952 {
5953 ixgbe_clean_tx_ring(tx_ring);
5954
5955 vfree(tx_ring->tx_buffer_info);
5956 tx_ring->tx_buffer_info = NULL;
5957
5958 /* if not set, then don't free */
5959 if (!tx_ring->desc)
5960 return;
5961
5962 dma_free_coherent(tx_ring->dev, tx_ring->size,
5963 tx_ring->desc, tx_ring->dma);
5964
5965 tx_ring->desc = NULL;
5966 }
5967
5968 /**
5969 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
5970 * @adapter: board private structure
5971 *
5972 * Free all transmit software resources
5973 **/
5974 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
5975 {
5976 int i;
5977
5978 for (i = 0; i < adapter->num_tx_queues; i++)
5979 if (adapter->tx_ring[i]->desc)
5980 ixgbe_free_tx_resources(adapter->tx_ring[i]);
5981 }
5982
5983 /**
5984 * ixgbe_free_rx_resources - Free Rx Resources
5985 * @rx_ring: ring to clean the resources from
5986 *
5987 * Free all receive software resources
5988 **/
5989 void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring)
5990 {
5991 ixgbe_clean_rx_ring(rx_ring);
5992
5993 vfree(rx_ring->rx_buffer_info);
5994 rx_ring->rx_buffer_info = NULL;
5995
5996 /* if not set, then don't free */
5997 if (!rx_ring->desc)
5998 return;
5999
6000 dma_free_coherent(rx_ring->dev, rx_ring->size,
6001 rx_ring->desc, rx_ring->dma);
6002
6003 rx_ring->desc = NULL;
6004 }
6005
6006 /**
6007 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
6008 * @adapter: board private structure
6009 *
6010 * Free all receive software resources
6011 **/
6012 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
6013 {
6014 int i;
6015
6016 #ifdef IXGBE_FCOE
6017 ixgbe_free_fcoe_ddp_resources(adapter);
6018
6019 #endif
6020 for (i = 0; i < adapter->num_rx_queues; i++)
6021 if (adapter->rx_ring[i]->desc)
6022 ixgbe_free_rx_resources(adapter->rx_ring[i]);
6023 }
6024
6025 /**
6026 * ixgbe_change_mtu - Change the Maximum Transfer Unit
6027 * @netdev: network interface device structure
6028 * @new_mtu: new value for maximum frame size
6029 *
6030 * Returns 0 on success, negative on failure
6031 **/
6032 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
6033 {
6034 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6035 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
6036
6037 /* MTU < 68 is an error and causes problems on some kernels */
6038 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
6039 return -EINVAL;
6040
6041 /*
6042 * For 82599EB we cannot allow legacy VFs to enable their receive
6043 * paths when MTU greater than 1500 is configured. So display a
6044 * warning that legacy VFs will be disabled.
6045 */
6046 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) &&
6047 (adapter->hw.mac.type == ixgbe_mac_82599EB) &&
6048 (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)))
6049 e_warn(probe, "Setting MTU > 1500 will disable legacy VFs\n");
6050
6051 e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
6052
6053 /* must set new MTU before calling down or up */
6054 netdev->mtu = new_mtu;
6055
6056 if (netif_running(netdev))
6057 ixgbe_reinit_locked(adapter);
6058
6059 return 0;
6060 }
6061
6062 /**
6063 * ixgbe_open - Called when a network interface is made active
6064 * @netdev: network interface device structure
6065 *
6066 * Returns 0 on success, negative value on failure
6067 *
6068 * The open entry point is called when a network interface is made
6069 * active by the system (IFF_UP). At this point all resources needed
6070 * for transmit and receive operations are allocated, the interrupt
6071 * handler is registered with the OS, the watchdog timer is started,
6072 * and the stack is notified that the interface is ready.
6073 **/
6074 int ixgbe_open(struct net_device *netdev)
6075 {
6076 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6077 struct ixgbe_hw *hw = &adapter->hw;
6078 int err, queues;
6079
6080 /* disallow open during test */
6081 if (test_bit(__IXGBE_TESTING, &adapter->state))
6082 return -EBUSY;
6083
6084 netif_carrier_off(netdev);
6085
6086 /* allocate transmit descriptors */
6087 err = ixgbe_setup_all_tx_resources(adapter);
6088 if (err)
6089 goto err_setup_tx;
6090
6091 /* allocate receive descriptors */
6092 err = ixgbe_setup_all_rx_resources(adapter);
6093 if (err)
6094 goto err_setup_rx;
6095
6096 ixgbe_configure(adapter);
6097
6098 err = ixgbe_request_irq(adapter);
6099 if (err)
6100 goto err_req_irq;
6101
6102 /* Notify the stack of the actual queue counts. */
6103 if (adapter->num_rx_pools > 1)
6104 queues = adapter->num_rx_queues_per_pool;
6105 else
6106 queues = adapter->num_tx_queues;
6107
6108 err = netif_set_real_num_tx_queues(netdev, queues);
6109 if (err)
6110 goto err_set_queues;
6111
6112 if (adapter->num_rx_pools > 1 &&
6113 adapter->num_rx_queues > IXGBE_MAX_L2A_QUEUES)
6114 queues = IXGBE_MAX_L2A_QUEUES;
6115 else
6116 queues = adapter->num_rx_queues;
6117 err = netif_set_real_num_rx_queues(netdev, queues);
6118 if (err)
6119 goto err_set_queues;
6120
6121 ixgbe_ptp_init(adapter);
6122
6123 ixgbe_up_complete(adapter);
6124
6125 ixgbe_clear_vxlan_port(adapter);
6126 #ifdef CONFIG_IXGBE_VXLAN
6127 vxlan_get_rx_port(netdev);
6128 #endif
6129
6130 return 0;
6131
6132 err_set_queues:
6133 ixgbe_free_irq(adapter);
6134 err_req_irq:
6135 ixgbe_free_all_rx_resources(adapter);
6136 if (hw->phy.ops.set_phy_power && !adapter->wol)
6137 hw->phy.ops.set_phy_power(&adapter->hw, false);
6138 err_setup_rx:
6139 ixgbe_free_all_tx_resources(adapter);
6140 err_setup_tx:
6141 ixgbe_reset(adapter);
6142
6143 return err;
6144 }
6145
6146 static void ixgbe_close_suspend(struct ixgbe_adapter *adapter)
6147 {
6148 ixgbe_ptp_suspend(adapter);
6149
6150 if (adapter->hw.phy.ops.enter_lplu) {
6151 adapter->hw.phy.reset_disable = true;
6152 ixgbe_down(adapter);
6153 adapter->hw.phy.ops.enter_lplu(&adapter->hw);
6154 adapter->hw.phy.reset_disable = false;
6155 } else {
6156 ixgbe_down(adapter);
6157 }
6158
6159 ixgbe_free_irq(adapter);
6160
6161 ixgbe_free_all_tx_resources(adapter);
6162 ixgbe_free_all_rx_resources(adapter);
6163 }
6164
6165 /**
6166 * ixgbe_close - Disables a network interface
6167 * @netdev: network interface device structure
6168 *
6169 * Returns 0, this is not allowed to fail
6170 *
6171 * The close entry point is called when an interface is de-activated
6172 * by the OS. The hardware is still under the drivers control, but
6173 * needs to be disabled. A global MAC reset is issued to stop the
6174 * hardware, and all transmit and receive resources are freed.
6175 **/
6176 int ixgbe_close(struct net_device *netdev)
6177 {
6178 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6179
6180 ixgbe_ptp_stop(adapter);
6181
6182 ixgbe_close_suspend(adapter);
6183
6184 ixgbe_fdir_filter_exit(adapter);
6185
6186 ixgbe_release_hw_control(adapter);
6187
6188 return 0;
6189 }
6190
6191 #ifdef CONFIG_PM
6192 static int ixgbe_resume(struct pci_dev *pdev)
6193 {
6194 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
6195 struct net_device *netdev = adapter->netdev;
6196 u32 err;
6197
6198 adapter->hw.hw_addr = adapter->io_addr;
6199 pci_set_power_state(pdev, PCI_D0);
6200 pci_restore_state(pdev);
6201 /*
6202 * pci_restore_state clears dev->state_saved so call
6203 * pci_save_state to restore it.
6204 */
6205 pci_save_state(pdev);
6206
6207 err = pci_enable_device_mem(pdev);
6208 if (err) {
6209 e_dev_err("Cannot enable PCI device from suspend\n");
6210 return err;
6211 }
6212 smp_mb__before_atomic();
6213 clear_bit(__IXGBE_DISABLED, &adapter->state);
6214 pci_set_master(pdev);
6215
6216 pci_wake_from_d3(pdev, false);
6217
6218 ixgbe_reset(adapter);
6219
6220 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
6221
6222 rtnl_lock();
6223 err = ixgbe_init_interrupt_scheme(adapter);
6224 if (!err && netif_running(netdev))
6225 err = ixgbe_open(netdev);
6226
6227 rtnl_unlock();
6228
6229 if (err)
6230 return err;
6231
6232 netif_device_attach(netdev);
6233
6234 return 0;
6235 }
6236 #endif /* CONFIG_PM */
6237
6238 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
6239 {
6240 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
6241 struct net_device *netdev = adapter->netdev;
6242 struct ixgbe_hw *hw = &adapter->hw;
6243 u32 ctrl, fctrl;
6244 u32 wufc = adapter->wol;
6245 #ifdef CONFIG_PM
6246 int retval = 0;
6247 #endif
6248
6249 netif_device_detach(netdev);
6250
6251 rtnl_lock();
6252 if (netif_running(netdev))
6253 ixgbe_close_suspend(adapter);
6254 rtnl_unlock();
6255
6256 ixgbe_clear_interrupt_scheme(adapter);
6257
6258 #ifdef CONFIG_PM
6259 retval = pci_save_state(pdev);
6260 if (retval)
6261 return retval;
6262
6263 #endif
6264 if (hw->mac.ops.stop_link_on_d3)
6265 hw->mac.ops.stop_link_on_d3(hw);
6266
6267 if (wufc) {
6268 ixgbe_set_rx_mode(netdev);
6269
6270 /* enable the optics for 82599 SFP+ fiber as we can WoL */
6271 if (hw->mac.ops.enable_tx_laser)
6272 hw->mac.ops.enable_tx_laser(hw);
6273
6274 /* turn on all-multi mode if wake on multicast is enabled */
6275 if (wufc & IXGBE_WUFC_MC) {
6276 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
6277 fctrl |= IXGBE_FCTRL_MPE;
6278 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
6279 }
6280
6281 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
6282 ctrl |= IXGBE_CTRL_GIO_DIS;
6283 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
6284
6285 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
6286 } else {
6287 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
6288 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
6289 }
6290
6291 switch (hw->mac.type) {
6292 case ixgbe_mac_82598EB:
6293 pci_wake_from_d3(pdev, false);
6294 break;
6295 case ixgbe_mac_82599EB:
6296 case ixgbe_mac_X540:
6297 case ixgbe_mac_X550:
6298 case ixgbe_mac_X550EM_x:
6299 case ixgbe_mac_x550em_a:
6300 pci_wake_from_d3(pdev, !!wufc);
6301 break;
6302 default:
6303 break;
6304 }
6305
6306 *enable_wake = !!wufc;
6307 if (hw->phy.ops.set_phy_power && !*enable_wake)
6308 hw->phy.ops.set_phy_power(hw, false);
6309
6310 ixgbe_release_hw_control(adapter);
6311
6312 if (!test_and_set_bit(__IXGBE_DISABLED, &adapter->state))
6313 pci_disable_device(pdev);
6314
6315 return 0;
6316 }
6317
6318 #ifdef CONFIG_PM
6319 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
6320 {
6321 int retval;
6322 bool wake;
6323
6324 retval = __ixgbe_shutdown(pdev, &wake);
6325 if (retval)
6326 return retval;
6327
6328 if (wake) {
6329 pci_prepare_to_sleep(pdev);
6330 } else {
6331 pci_wake_from_d3(pdev, false);
6332 pci_set_power_state(pdev, PCI_D3hot);
6333 }
6334
6335 return 0;
6336 }
6337 #endif /* CONFIG_PM */
6338
6339 static void ixgbe_shutdown(struct pci_dev *pdev)
6340 {
6341 bool wake;
6342
6343 __ixgbe_shutdown(pdev, &wake);
6344
6345 if (system_state == SYSTEM_POWER_OFF) {
6346 pci_wake_from_d3(pdev, wake);
6347 pci_set_power_state(pdev, PCI_D3hot);
6348 }
6349 }
6350
6351 /**
6352 * ixgbe_update_stats - Update the board statistics counters.
6353 * @adapter: board private structure
6354 **/
6355 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
6356 {
6357 struct net_device *netdev = adapter->netdev;
6358 struct ixgbe_hw *hw = &adapter->hw;
6359 struct ixgbe_hw_stats *hwstats = &adapter->stats;
6360 u64 total_mpc = 0;
6361 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
6362 u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
6363 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
6364 u64 bytes = 0, packets = 0, hw_csum_rx_error = 0;
6365
6366 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6367 test_bit(__IXGBE_RESETTING, &adapter->state))
6368 return;
6369
6370 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
6371 u64 rsc_count = 0;
6372 u64 rsc_flush = 0;
6373 for (i = 0; i < adapter->num_rx_queues; i++) {
6374 rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
6375 rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
6376 }
6377 adapter->rsc_total_count = rsc_count;
6378 adapter->rsc_total_flush = rsc_flush;
6379 }
6380
6381 for (i = 0; i < adapter->num_rx_queues; i++) {
6382 struct ixgbe_ring *rx_ring = adapter->rx_ring[i];
6383 non_eop_descs += rx_ring->rx_stats.non_eop_descs;
6384 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
6385 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
6386 hw_csum_rx_error += rx_ring->rx_stats.csum_err;
6387 bytes += rx_ring->stats.bytes;
6388 packets += rx_ring->stats.packets;
6389 }
6390 adapter->non_eop_descs = non_eop_descs;
6391 adapter->alloc_rx_page_failed = alloc_rx_page_failed;
6392 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
6393 adapter->hw_csum_rx_error = hw_csum_rx_error;
6394 netdev->stats.rx_bytes = bytes;
6395 netdev->stats.rx_packets = packets;
6396
6397 bytes = 0;
6398 packets = 0;
6399 /* gather some stats to the adapter struct that are per queue */
6400 for (i = 0; i < adapter->num_tx_queues; i++) {
6401 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
6402 restart_queue += tx_ring->tx_stats.restart_queue;
6403 tx_busy += tx_ring->tx_stats.tx_busy;
6404 bytes += tx_ring->stats.bytes;
6405 packets += tx_ring->stats.packets;
6406 }
6407 adapter->restart_queue = restart_queue;
6408 adapter->tx_busy = tx_busy;
6409 netdev->stats.tx_bytes = bytes;
6410 netdev->stats.tx_packets = packets;
6411
6412 hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
6413
6414 /* 8 register reads */
6415 for (i = 0; i < 8; i++) {
6416 /* for packet buffers not used, the register should read 0 */
6417 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
6418 missed_rx += mpc;
6419 hwstats->mpc[i] += mpc;
6420 total_mpc += hwstats->mpc[i];
6421 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
6422 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
6423 switch (hw->mac.type) {
6424 case ixgbe_mac_82598EB:
6425 hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
6426 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
6427 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
6428 hwstats->pxonrxc[i] +=
6429 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
6430 break;
6431 case ixgbe_mac_82599EB:
6432 case ixgbe_mac_X540:
6433 case ixgbe_mac_X550:
6434 case ixgbe_mac_X550EM_x:
6435 case ixgbe_mac_x550em_a:
6436 hwstats->pxonrxc[i] +=
6437 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
6438 break;
6439 default:
6440 break;
6441 }
6442 }
6443
6444 /*16 register reads */
6445 for (i = 0; i < 16; i++) {
6446 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
6447 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
6448 if ((hw->mac.type == ixgbe_mac_82599EB) ||
6449 (hw->mac.type == ixgbe_mac_X540) ||
6450 (hw->mac.type == ixgbe_mac_X550) ||
6451 (hw->mac.type == ixgbe_mac_X550EM_x) ||
6452 (hw->mac.type == ixgbe_mac_x550em_a)) {
6453 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
6454 IXGBE_READ_REG(hw, IXGBE_QBTC_H(i)); /* to clear */
6455 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC_L(i));
6456 IXGBE_READ_REG(hw, IXGBE_QBRC_H(i)); /* to clear */
6457 }
6458 }
6459
6460 hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
6461 /* work around hardware counting issue */
6462 hwstats->gprc -= missed_rx;
6463
6464 ixgbe_update_xoff_received(adapter);
6465
6466 /* 82598 hardware only has a 32 bit counter in the high register */
6467 switch (hw->mac.type) {
6468 case ixgbe_mac_82598EB:
6469 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
6470 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
6471 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
6472 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
6473 break;
6474 case ixgbe_mac_X540:
6475 case ixgbe_mac_X550:
6476 case ixgbe_mac_X550EM_x:
6477 case ixgbe_mac_x550em_a:
6478 /* OS2BMC stats are X540 and later */
6479 hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC);
6480 hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC);
6481 hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC);
6482 hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC);
6483 case ixgbe_mac_82599EB:
6484 for (i = 0; i < 16; i++)
6485 adapter->hw_rx_no_dma_resources +=
6486 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
6487 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
6488 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
6489 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
6490 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
6491 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
6492 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
6493 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
6494 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
6495 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
6496 #ifdef IXGBE_FCOE
6497 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
6498 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
6499 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
6500 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
6501 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
6502 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
6503 /* Add up per cpu counters for total ddp aloc fail */
6504 if (adapter->fcoe.ddp_pool) {
6505 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
6506 struct ixgbe_fcoe_ddp_pool *ddp_pool;
6507 unsigned int cpu;
6508 u64 noddp = 0, noddp_ext_buff = 0;
6509 for_each_possible_cpu(cpu) {
6510 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
6511 noddp += ddp_pool->noddp;
6512 noddp_ext_buff += ddp_pool->noddp_ext_buff;
6513 }
6514 hwstats->fcoe_noddp = noddp;
6515 hwstats->fcoe_noddp_ext_buff = noddp_ext_buff;
6516 }
6517 #endif /* IXGBE_FCOE */
6518 break;
6519 default:
6520 break;
6521 }
6522 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
6523 hwstats->bprc += bprc;
6524 hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
6525 if (hw->mac.type == ixgbe_mac_82598EB)
6526 hwstats->mprc -= bprc;
6527 hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
6528 hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
6529 hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
6530 hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
6531 hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
6532 hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
6533 hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
6534 hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
6535 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
6536 hwstats->lxontxc += lxon;
6537 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
6538 hwstats->lxofftxc += lxoff;
6539 hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
6540 hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
6541 /*
6542 * 82598 errata - tx of flow control packets is included in tx counters
6543 */
6544 xon_off_tot = lxon + lxoff;
6545 hwstats->gptc -= xon_off_tot;
6546 hwstats->mptc -= xon_off_tot;
6547 hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
6548 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
6549 hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
6550 hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
6551 hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
6552 hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
6553 hwstats->ptc64 -= xon_off_tot;
6554 hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
6555 hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
6556 hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
6557 hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
6558 hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
6559 hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
6560
6561 /* Fill out the OS statistics structure */
6562 netdev->stats.multicast = hwstats->mprc;
6563
6564 /* Rx Errors */
6565 netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
6566 netdev->stats.rx_dropped = 0;
6567 netdev->stats.rx_length_errors = hwstats->rlec;
6568 netdev->stats.rx_crc_errors = hwstats->crcerrs;
6569 netdev->stats.rx_missed_errors = total_mpc;
6570 }
6571
6572 /**
6573 * ixgbe_fdir_reinit_subtask - worker thread to reinit FDIR filter table
6574 * @adapter: pointer to the device adapter structure
6575 **/
6576 static void ixgbe_fdir_reinit_subtask(struct ixgbe_adapter *adapter)
6577 {
6578 struct ixgbe_hw *hw = &adapter->hw;
6579 int i;
6580
6581 if (!(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
6582 return;
6583
6584 adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
6585
6586 /* if interface is down do nothing */
6587 if (test_bit(__IXGBE_DOWN, &adapter->state))
6588 return;
6589
6590 /* do nothing if we are not using signature filters */
6591 if (!(adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE))
6592 return;
6593
6594 adapter->fdir_overflow++;
6595
6596 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
6597 for (i = 0; i < adapter->num_tx_queues; i++)
6598 set_bit(__IXGBE_TX_FDIR_INIT_DONE,
6599 &(adapter->tx_ring[i]->state));
6600 /* re-enable flow director interrupts */
6601 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
6602 } else {
6603 e_err(probe, "failed to finish FDIR re-initialization, "
6604 "ignored adding FDIR ATR filters\n");
6605 }
6606 }
6607
6608 /**
6609 * ixgbe_check_hang_subtask - check for hung queues and dropped interrupts
6610 * @adapter: pointer to the device adapter structure
6611 *
6612 * This function serves two purposes. First it strobes the interrupt lines
6613 * in order to make certain interrupts are occurring. Secondly it sets the
6614 * bits needed to check for TX hangs. As a result we should immediately
6615 * determine if a hang has occurred.
6616 */
6617 static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter)
6618 {
6619 struct ixgbe_hw *hw = &adapter->hw;
6620 u64 eics = 0;
6621 int i;
6622
6623 /* If we're down, removing or resetting, just bail */
6624 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6625 test_bit(__IXGBE_REMOVING, &adapter->state) ||
6626 test_bit(__IXGBE_RESETTING, &adapter->state))
6627 return;
6628
6629 /* Force detection of hung controller */
6630 if (netif_carrier_ok(adapter->netdev)) {
6631 for (i = 0; i < adapter->num_tx_queues; i++)
6632 set_check_for_tx_hang(adapter->tx_ring[i]);
6633 }
6634
6635 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
6636 /*
6637 * for legacy and MSI interrupts don't set any bits
6638 * that are enabled for EIAM, because this operation
6639 * would set *both* EIMS and EICS for any bit in EIAM
6640 */
6641 IXGBE_WRITE_REG(hw, IXGBE_EICS,
6642 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
6643 } else {
6644 /* get one bit for every active tx/rx interrupt vector */
6645 for (i = 0; i < adapter->num_q_vectors; i++) {
6646 struct ixgbe_q_vector *qv = adapter->q_vector[i];
6647 if (qv->rx.ring || qv->tx.ring)
6648 eics |= ((u64)1 << i);
6649 }
6650 }
6651
6652 /* Cause software interrupt to ensure rings are cleaned */
6653 ixgbe_irq_rearm_queues(adapter, eics);
6654 }
6655
6656 /**
6657 * ixgbe_watchdog_update_link - update the link status
6658 * @adapter: pointer to the device adapter structure
6659 * @link_speed: pointer to a u32 to store the link_speed
6660 **/
6661 static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter)
6662 {
6663 struct ixgbe_hw *hw = &adapter->hw;
6664 u32 link_speed = adapter->link_speed;
6665 bool link_up = adapter->link_up;
6666 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
6667
6668 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
6669 return;
6670
6671 if (hw->mac.ops.check_link) {
6672 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
6673 } else {
6674 /* always assume link is up, if no check link function */
6675 link_speed = IXGBE_LINK_SPEED_10GB_FULL;
6676 link_up = true;
6677 }
6678
6679 /* If Crosstalk fix enabled do the sanity check of making sure
6680 * the SFP+ cage is empty.
6681 */
6682 if (adapter->need_crosstalk_fix) {
6683 u32 sfp_cage_full;
6684
6685 sfp_cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) &
6686 IXGBE_ESDP_SDP2;
6687 if (ixgbe_is_sfp(hw) && link_up && !sfp_cage_full)
6688 link_up = false;
6689 }
6690
6691 if (adapter->ixgbe_ieee_pfc)
6692 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
6693
6694 if (link_up && !((adapter->flags & IXGBE_FLAG_DCB_ENABLED) && pfc_en)) {
6695 hw->mac.ops.fc_enable(hw);
6696 ixgbe_set_rx_drop_en(adapter);
6697 }
6698
6699 if (link_up ||
6700 time_after(jiffies, (adapter->link_check_timeout +
6701 IXGBE_TRY_LINK_TIMEOUT))) {
6702 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
6703 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
6704 IXGBE_WRITE_FLUSH(hw);
6705 }
6706
6707 adapter->link_up = link_up;
6708 adapter->link_speed = link_speed;
6709 }
6710
6711 static void ixgbe_update_default_up(struct ixgbe_adapter *adapter)
6712 {
6713 #ifdef CONFIG_IXGBE_DCB
6714 struct net_device *netdev = adapter->netdev;
6715 struct dcb_app app = {
6716 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE,
6717 .protocol = 0,
6718 };
6719 u8 up = 0;
6720
6721 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE)
6722 up = dcb_ieee_getapp_mask(netdev, &app);
6723
6724 adapter->default_up = (up > 1) ? (ffs(up) - 1) : 0;
6725 #endif
6726 }
6727
6728 /**
6729 * ixgbe_watchdog_link_is_up - update netif_carrier status and
6730 * print link up message
6731 * @adapter: pointer to the device adapter structure
6732 **/
6733 static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
6734 {
6735 struct net_device *netdev = adapter->netdev;
6736 struct ixgbe_hw *hw = &adapter->hw;
6737 struct net_device *upper;
6738 struct list_head *iter;
6739 u32 link_speed = adapter->link_speed;
6740 const char *speed_str;
6741 bool flow_rx, flow_tx;
6742
6743 /* only continue if link was previously down */
6744 if (netif_carrier_ok(netdev))
6745 return;
6746
6747 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
6748
6749 switch (hw->mac.type) {
6750 case ixgbe_mac_82598EB: {
6751 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
6752 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
6753 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
6754 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
6755 }
6756 break;
6757 case ixgbe_mac_X540:
6758 case ixgbe_mac_X550:
6759 case ixgbe_mac_X550EM_x:
6760 case ixgbe_mac_x550em_a:
6761 case ixgbe_mac_82599EB: {
6762 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
6763 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
6764 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
6765 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
6766 }
6767 break;
6768 default:
6769 flow_tx = false;
6770 flow_rx = false;
6771 break;
6772 }
6773
6774 adapter->last_rx_ptp_check = jiffies;
6775
6776 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
6777 ixgbe_ptp_start_cyclecounter(adapter);
6778
6779 switch (link_speed) {
6780 case IXGBE_LINK_SPEED_10GB_FULL:
6781 speed_str = "10 Gbps";
6782 break;
6783 case IXGBE_LINK_SPEED_2_5GB_FULL:
6784 speed_str = "2.5 Gbps";
6785 break;
6786 case IXGBE_LINK_SPEED_1GB_FULL:
6787 speed_str = "1 Gbps";
6788 break;
6789 case IXGBE_LINK_SPEED_100_FULL:
6790 speed_str = "100 Mbps";
6791 break;
6792 default:
6793 speed_str = "unknown speed";
6794 break;
6795 }
6796 e_info(drv, "NIC Link is Up %s, Flow Control: %s\n", speed_str,
6797 ((flow_rx && flow_tx) ? "RX/TX" :
6798 (flow_rx ? "RX" :
6799 (flow_tx ? "TX" : "None"))));
6800
6801 netif_carrier_on(netdev);
6802 ixgbe_check_vf_rate_limit(adapter);
6803
6804 /* enable transmits */
6805 netif_tx_wake_all_queues(adapter->netdev);
6806
6807 /* enable any upper devices */
6808 rtnl_lock();
6809 netdev_for_each_all_upper_dev_rcu(adapter->netdev, upper, iter) {
6810 if (netif_is_macvlan(upper)) {
6811 struct macvlan_dev *vlan = netdev_priv(upper);
6812
6813 if (vlan->fwd_priv)
6814 netif_tx_wake_all_queues(upper);
6815 }
6816 }
6817 rtnl_unlock();
6818
6819 /* update the default user priority for VFs */
6820 ixgbe_update_default_up(adapter);
6821
6822 /* ping all the active vfs to let them know link has changed */
6823 ixgbe_ping_all_vfs(adapter);
6824 }
6825
6826 /**
6827 * ixgbe_watchdog_link_is_down - update netif_carrier status and
6828 * print link down message
6829 * @adapter: pointer to the adapter structure
6830 **/
6831 static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter *adapter)
6832 {
6833 struct net_device *netdev = adapter->netdev;
6834 struct ixgbe_hw *hw = &adapter->hw;
6835
6836 adapter->link_up = false;
6837 adapter->link_speed = 0;
6838
6839 /* only continue if link was up previously */
6840 if (!netif_carrier_ok(netdev))
6841 return;
6842
6843 /* poll for SFP+ cable when link is down */
6844 if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB)
6845 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
6846
6847 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
6848 ixgbe_ptp_start_cyclecounter(adapter);
6849
6850 e_info(drv, "NIC Link is Down\n");
6851 netif_carrier_off(netdev);
6852
6853 /* ping all the active vfs to let them know link has changed */
6854 ixgbe_ping_all_vfs(adapter);
6855 }
6856
6857 static bool ixgbe_ring_tx_pending(struct ixgbe_adapter *adapter)
6858 {
6859 int i;
6860
6861 for (i = 0; i < adapter->num_tx_queues; i++) {
6862 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
6863
6864 if (tx_ring->next_to_use != tx_ring->next_to_clean)
6865 return true;
6866 }
6867
6868 return false;
6869 }
6870
6871 static bool ixgbe_vf_tx_pending(struct ixgbe_adapter *adapter)
6872 {
6873 struct ixgbe_hw *hw = &adapter->hw;
6874 struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ];
6875 u32 q_per_pool = __ALIGN_MASK(1, ~vmdq->mask);
6876
6877 int i, j;
6878
6879 if (!adapter->num_vfs)
6880 return false;
6881
6882 /* resetting the PF is only needed for MAC before X550 */
6883 if (hw->mac.type >= ixgbe_mac_X550)
6884 return false;
6885
6886 for (i = 0; i < adapter->num_vfs; i++) {
6887 for (j = 0; j < q_per_pool; j++) {
6888 u32 h, t;
6889
6890 h = IXGBE_READ_REG(hw, IXGBE_PVFTDHN(q_per_pool, i, j));
6891 t = IXGBE_READ_REG(hw, IXGBE_PVFTDTN(q_per_pool, i, j));
6892
6893 if (h != t)
6894 return true;
6895 }
6896 }
6897
6898 return false;
6899 }
6900
6901 /**
6902 * ixgbe_watchdog_flush_tx - flush queues on link down
6903 * @adapter: pointer to the device adapter structure
6904 **/
6905 static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter)
6906 {
6907 if (!netif_carrier_ok(adapter->netdev)) {
6908 if (ixgbe_ring_tx_pending(adapter) ||
6909 ixgbe_vf_tx_pending(adapter)) {
6910 /* We've lost link, so the controller stops DMA,
6911 * but we've got queued Tx work that's never going
6912 * to get done, so reset controller to flush Tx.
6913 * (Do the reset outside of interrupt context).
6914 */
6915 e_warn(drv, "initiating reset to clear Tx work after link loss\n");
6916 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
6917 }
6918 }
6919 }
6920
6921 #ifdef CONFIG_PCI_IOV
6922 static inline void ixgbe_issue_vf_flr(struct ixgbe_adapter *adapter,
6923 struct pci_dev *vfdev)
6924 {
6925 if (!pci_wait_for_pending_transaction(vfdev))
6926 e_dev_warn("Issuing VFLR with pending transactions\n");
6927
6928 e_dev_err("Issuing VFLR for VF %s\n", pci_name(vfdev));
6929 pcie_capability_set_word(vfdev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR);
6930
6931 msleep(100);
6932 }
6933
6934 static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter)
6935 {
6936 struct ixgbe_hw *hw = &adapter->hw;
6937 struct pci_dev *pdev = adapter->pdev;
6938 unsigned int vf;
6939 u32 gpc;
6940
6941 if (!(netif_carrier_ok(adapter->netdev)))
6942 return;
6943
6944 gpc = IXGBE_READ_REG(hw, IXGBE_TXDGPC);
6945 if (gpc) /* If incrementing then no need for the check below */
6946 return;
6947 /* Check to see if a bad DMA write target from an errant or
6948 * malicious VF has caused a PCIe error. If so then we can
6949 * issue a VFLR to the offending VF(s) and then resume without
6950 * requesting a full slot reset.
6951 */
6952
6953 if (!pdev)
6954 return;
6955
6956 /* check status reg for all VFs owned by this PF */
6957 for (vf = 0; vf < adapter->num_vfs; ++vf) {
6958 struct pci_dev *vfdev = adapter->vfinfo[vf].vfdev;
6959 u16 status_reg;
6960
6961 if (!vfdev)
6962 continue;
6963 pci_read_config_word(vfdev, PCI_STATUS, &status_reg);
6964 if (status_reg != IXGBE_FAILED_READ_CFG_WORD &&
6965 status_reg & PCI_STATUS_REC_MASTER_ABORT)
6966 ixgbe_issue_vf_flr(adapter, vfdev);
6967 }
6968 }
6969
6970 static void ixgbe_spoof_check(struct ixgbe_adapter *adapter)
6971 {
6972 u32 ssvpc;
6973
6974 /* Do not perform spoof check for 82598 or if not in IOV mode */
6975 if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
6976 adapter->num_vfs == 0)
6977 return;
6978
6979 ssvpc = IXGBE_READ_REG(&adapter->hw, IXGBE_SSVPC);
6980
6981 /*
6982 * ssvpc register is cleared on read, if zero then no
6983 * spoofed packets in the last interval.
6984 */
6985 if (!ssvpc)
6986 return;
6987
6988 e_warn(drv, "%u Spoofed packets detected\n", ssvpc);
6989 }
6990 #else
6991 static void ixgbe_spoof_check(struct ixgbe_adapter __always_unused *adapter)
6992 {
6993 }
6994
6995 static void
6996 ixgbe_check_for_bad_vf(struct ixgbe_adapter __always_unused *adapter)
6997 {
6998 }
6999 #endif /* CONFIG_PCI_IOV */
7000
7001
7002 /**
7003 * ixgbe_watchdog_subtask - check and bring link up
7004 * @adapter: pointer to the device adapter structure
7005 **/
7006 static void ixgbe_watchdog_subtask(struct ixgbe_adapter *adapter)
7007 {
7008 /* if interface is down, removing or resetting, do nothing */
7009 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
7010 test_bit(__IXGBE_REMOVING, &adapter->state) ||
7011 test_bit(__IXGBE_RESETTING, &adapter->state))
7012 return;
7013
7014 ixgbe_watchdog_update_link(adapter);
7015
7016 if (adapter->link_up)
7017 ixgbe_watchdog_link_is_up(adapter);
7018 else
7019 ixgbe_watchdog_link_is_down(adapter);
7020
7021 ixgbe_check_for_bad_vf(adapter);
7022 ixgbe_spoof_check(adapter);
7023 ixgbe_update_stats(adapter);
7024
7025 ixgbe_watchdog_flush_tx(adapter);
7026 }
7027
7028 /**
7029 * ixgbe_sfp_detection_subtask - poll for SFP+ cable
7030 * @adapter: the ixgbe adapter structure
7031 **/
7032 static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter)
7033 {
7034 struct ixgbe_hw *hw = &adapter->hw;
7035 s32 err;
7036
7037 /* If crosstalk fix enabled verify the SFP+ cage is full */
7038 if (adapter->need_crosstalk_fix) {
7039 u32 sfp_cage_full;
7040
7041 sfp_cage_full = IXGBE_READ_REG(hw, IXGBE_ESDP) &
7042 IXGBE_ESDP_SDP2;
7043 if (!sfp_cage_full)
7044 return;
7045 }
7046
7047 /* not searching for SFP so there is nothing to do here */
7048 if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) &&
7049 !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
7050 return;
7051
7052 if (adapter->sfp_poll_time &&
7053 time_after(adapter->sfp_poll_time, jiffies))
7054 return; /* If not yet time to poll for SFP */
7055
7056 /* someone else is in init, wait until next service event */
7057 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
7058 return;
7059
7060 adapter->sfp_poll_time = jiffies + IXGBE_SFP_POLL_JIFFIES - 1;
7061
7062 err = hw->phy.ops.identify_sfp(hw);
7063 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
7064 goto sfp_out;
7065
7066 if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
7067 /* If no cable is present, then we need to reset
7068 * the next time we find a good cable. */
7069 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
7070 }
7071
7072 /* exit on error */
7073 if (err)
7074 goto sfp_out;
7075
7076 /* exit if reset not needed */
7077 if (!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
7078 goto sfp_out;
7079
7080 adapter->flags2 &= ~IXGBE_FLAG2_SFP_NEEDS_RESET;
7081
7082 /*
7083 * A module may be identified correctly, but the EEPROM may not have
7084 * support for that module. setup_sfp() will fail in that case, so
7085 * we should not allow that module to load.
7086 */
7087 if (hw->mac.type == ixgbe_mac_82598EB)
7088 err = hw->phy.ops.reset(hw);
7089 else
7090 err = hw->mac.ops.setup_sfp(hw);
7091
7092 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
7093 goto sfp_out;
7094
7095 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
7096 e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
7097
7098 sfp_out:
7099 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
7100
7101 if ((err == IXGBE_ERR_SFP_NOT_SUPPORTED) &&
7102 (adapter->netdev->reg_state == NETREG_REGISTERED)) {
7103 e_dev_err("failed to initialize because an unsupported "
7104 "SFP+ module type was detected.\n");
7105 e_dev_err("Reload the driver after installing a "
7106 "supported module.\n");
7107 unregister_netdev(adapter->netdev);
7108 }
7109 }
7110
7111 /**
7112 * ixgbe_sfp_link_config_subtask - set up link SFP after module install
7113 * @adapter: the ixgbe adapter structure
7114 **/
7115 static void ixgbe_sfp_link_config_subtask(struct ixgbe_adapter *adapter)
7116 {
7117 struct ixgbe_hw *hw = &adapter->hw;
7118 u32 speed;
7119 bool autoneg = false;
7120
7121 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_CONFIG))
7122 return;
7123
7124 /* someone else is in init, wait until next service event */
7125 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
7126 return;
7127
7128 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
7129
7130 speed = hw->phy.autoneg_advertised;
7131 if ((!speed) && (hw->mac.ops.get_link_capabilities)) {
7132 hw->mac.ops.get_link_capabilities(hw, &speed, &autoneg);
7133
7134 /* setup the highest link when no autoneg */
7135 if (!autoneg) {
7136 if (speed & IXGBE_LINK_SPEED_10GB_FULL)
7137 speed = IXGBE_LINK_SPEED_10GB_FULL;
7138 }
7139 }
7140
7141 if (hw->mac.ops.setup_link)
7142 hw->mac.ops.setup_link(hw, speed, true);
7143
7144 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
7145 adapter->link_check_timeout = jiffies;
7146 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
7147 }
7148
7149 /**
7150 * ixgbe_service_timer - Timer Call-back
7151 * @data: pointer to adapter cast into an unsigned long
7152 **/
7153 static void ixgbe_service_timer(unsigned long data)
7154 {
7155 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
7156 unsigned long next_event_offset;
7157
7158 /* poll faster when waiting for link */
7159 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
7160 next_event_offset = HZ / 10;
7161 else
7162 next_event_offset = HZ * 2;
7163
7164 /* Reset the timer */
7165 mod_timer(&adapter->service_timer, next_event_offset + jiffies);
7166
7167 ixgbe_service_event_schedule(adapter);
7168 }
7169
7170 static void ixgbe_phy_interrupt_subtask(struct ixgbe_adapter *adapter)
7171 {
7172 struct ixgbe_hw *hw = &adapter->hw;
7173 u32 status;
7174
7175 if (!(adapter->flags2 & IXGBE_FLAG2_PHY_INTERRUPT))
7176 return;
7177
7178 adapter->flags2 &= ~IXGBE_FLAG2_PHY_INTERRUPT;
7179
7180 if (!hw->phy.ops.handle_lasi)
7181 return;
7182
7183 status = hw->phy.ops.handle_lasi(&adapter->hw);
7184 if (status != IXGBE_ERR_OVERTEMP)
7185 return;
7186
7187 e_crit(drv, "%s\n", ixgbe_overheat_msg);
7188 }
7189
7190 static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter)
7191 {
7192 if (!(adapter->flags2 & IXGBE_FLAG2_RESET_REQUESTED))
7193 return;
7194
7195 adapter->flags2 &= ~IXGBE_FLAG2_RESET_REQUESTED;
7196
7197 /* If we're already down, removing or resetting, just bail */
7198 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
7199 test_bit(__IXGBE_REMOVING, &adapter->state) ||
7200 test_bit(__IXGBE_RESETTING, &adapter->state))
7201 return;
7202
7203 ixgbe_dump(adapter);
7204 netdev_err(adapter->netdev, "Reset adapter\n");
7205 adapter->tx_timeout_count++;
7206
7207 rtnl_lock();
7208 ixgbe_reinit_locked(adapter);
7209 rtnl_unlock();
7210 }
7211
7212 /**
7213 * ixgbe_service_task - manages and runs subtasks
7214 * @work: pointer to work_struct containing our data
7215 **/
7216 static void ixgbe_service_task(struct work_struct *work)
7217 {
7218 struct ixgbe_adapter *adapter = container_of(work,
7219 struct ixgbe_adapter,
7220 service_task);
7221 if (ixgbe_removed(adapter->hw.hw_addr)) {
7222 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
7223 rtnl_lock();
7224 ixgbe_down(adapter);
7225 rtnl_unlock();
7226 }
7227 ixgbe_service_event_complete(adapter);
7228 return;
7229 }
7230 #ifdef CONFIG_IXGBE_VXLAN
7231 rtnl_lock();
7232 if (adapter->flags2 & IXGBE_FLAG2_VXLAN_REREG_NEEDED) {
7233 adapter->flags2 &= ~IXGBE_FLAG2_VXLAN_REREG_NEEDED;
7234 vxlan_get_rx_port(adapter->netdev);
7235 }
7236 rtnl_unlock();
7237 #endif /* CONFIG_IXGBE_VXLAN */
7238 ixgbe_reset_subtask(adapter);
7239 ixgbe_phy_interrupt_subtask(adapter);
7240 ixgbe_sfp_detection_subtask(adapter);
7241 ixgbe_sfp_link_config_subtask(adapter);
7242 ixgbe_check_overtemp_subtask(adapter);
7243 ixgbe_watchdog_subtask(adapter);
7244 ixgbe_fdir_reinit_subtask(adapter);
7245 ixgbe_check_hang_subtask(adapter);
7246
7247 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state)) {
7248 ixgbe_ptp_overflow_check(adapter);
7249 ixgbe_ptp_rx_hang(adapter);
7250 }
7251
7252 ixgbe_service_event_complete(adapter);
7253 }
7254
7255 static int ixgbe_tso(struct ixgbe_ring *tx_ring,
7256 struct ixgbe_tx_buffer *first,
7257 u8 *hdr_len)
7258 {
7259 struct sk_buff *skb = first->skb;
7260 u32 vlan_macip_lens, type_tucmd;
7261 u32 mss_l4len_idx, l4len;
7262 int err;
7263
7264 if (skb->ip_summed != CHECKSUM_PARTIAL)
7265 return 0;
7266
7267 if (!skb_is_gso(skb))
7268 return 0;
7269
7270 err = skb_cow_head(skb, 0);
7271 if (err < 0)
7272 return err;
7273
7274 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
7275 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
7276
7277 if (first->protocol == htons(ETH_P_IP)) {
7278 struct iphdr *iph = ip_hdr(skb);
7279 iph->tot_len = 0;
7280 iph->check = 0;
7281 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
7282 iph->daddr, 0,
7283 IPPROTO_TCP,
7284 0);
7285 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
7286 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
7287 IXGBE_TX_FLAGS_CSUM |
7288 IXGBE_TX_FLAGS_IPV4;
7289 } else if (skb_is_gso_v6(skb)) {
7290 ipv6_hdr(skb)->payload_len = 0;
7291 tcp_hdr(skb)->check =
7292 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
7293 &ipv6_hdr(skb)->daddr,
7294 0, IPPROTO_TCP, 0);
7295 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
7296 IXGBE_TX_FLAGS_CSUM;
7297 }
7298
7299 /* compute header lengths */
7300 l4len = tcp_hdrlen(skb);
7301 *hdr_len = skb_transport_offset(skb) + l4len;
7302
7303 /* update gso size and bytecount with header size */
7304 first->gso_segs = skb_shinfo(skb)->gso_segs;
7305 first->bytecount += (first->gso_segs - 1) * *hdr_len;
7306
7307 /* mss_l4len_id: use 0 as index for TSO */
7308 mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
7309 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
7310
7311 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
7312 vlan_macip_lens = skb_network_header_len(skb);
7313 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
7314 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
7315
7316 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, type_tucmd,
7317 mss_l4len_idx);
7318
7319 return 1;
7320 }
7321
7322 static inline bool ixgbe_ipv6_csum_is_sctp(struct sk_buff *skb)
7323 {
7324 unsigned int offset = 0;
7325
7326 ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL);
7327
7328 return offset == skb_checksum_start_offset(skb);
7329 }
7330
7331 static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
7332 struct ixgbe_tx_buffer *first)
7333 {
7334 struct sk_buff *skb = first->skb;
7335 u32 vlan_macip_lens = 0;
7336 u32 type_tucmd = 0;
7337
7338 if (skb->ip_summed != CHECKSUM_PARTIAL) {
7339 csum_failed:
7340 if (!(first->tx_flags & (IXGBE_TX_FLAGS_HW_VLAN |
7341 IXGBE_TX_FLAGS_CC)))
7342 return;
7343 goto no_csum;
7344 }
7345
7346 switch (skb->csum_offset) {
7347 case offsetof(struct tcphdr, check):
7348 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
7349 /* fall through */
7350 case offsetof(struct udphdr, check):
7351 break;
7352 case offsetof(struct sctphdr, checksum):
7353 /* validate that this is actually an SCTP request */
7354 if (((first->protocol == htons(ETH_P_IP)) &&
7355 (ip_hdr(skb)->protocol == IPPROTO_SCTP)) ||
7356 ((first->protocol == htons(ETH_P_IPV6)) &&
7357 ixgbe_ipv6_csum_is_sctp(skb))) {
7358 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_SCTP;
7359 break;
7360 }
7361 /* fall through */
7362 default:
7363 skb_checksum_help(skb);
7364 goto csum_failed;
7365 }
7366
7367 /* update TX checksum flag */
7368 first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
7369 vlan_macip_lens = skb_checksum_start_offset(skb) -
7370 skb_network_offset(skb);
7371 no_csum:
7372 /* vlan_macip_lens: MACLEN, VLAN tag */
7373 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
7374 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
7375
7376 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, type_tucmd, 0);
7377 }
7378
7379 #define IXGBE_SET_FLAG(_input, _flag, _result) \
7380 ((_flag <= _result) ? \
7381 ((u32)(_input & _flag) * (_result / _flag)) : \
7382 ((u32)(_input & _flag) / (_flag / _result)))
7383
7384 static u32 ixgbe_tx_cmd_type(struct sk_buff *skb, u32 tx_flags)
7385 {
7386 /* set type for advanced descriptor with frame checksum insertion */
7387 u32 cmd_type = IXGBE_ADVTXD_DTYP_DATA |
7388 IXGBE_ADVTXD_DCMD_DEXT |
7389 IXGBE_ADVTXD_DCMD_IFCS;
7390
7391 /* set HW vlan bit if vlan is present */
7392 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_HW_VLAN,
7393 IXGBE_ADVTXD_DCMD_VLE);
7394
7395 /* set segmentation enable bits for TSO/FSO */
7396 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSO,
7397 IXGBE_ADVTXD_DCMD_TSE);
7398
7399 /* set timestamp bit if present */
7400 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSTAMP,
7401 IXGBE_ADVTXD_MAC_TSTAMP);
7402
7403 /* insert frame checksum */
7404 cmd_type ^= IXGBE_SET_FLAG(skb->no_fcs, 1, IXGBE_ADVTXD_DCMD_IFCS);
7405
7406 return cmd_type;
7407 }
7408
7409 static void ixgbe_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
7410 u32 tx_flags, unsigned int paylen)
7411 {
7412 u32 olinfo_status = paylen << IXGBE_ADVTXD_PAYLEN_SHIFT;
7413
7414 /* enable L4 checksum for TSO and TX checksum offload */
7415 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
7416 IXGBE_TX_FLAGS_CSUM,
7417 IXGBE_ADVTXD_POPTS_TXSM);
7418
7419 /* enble IPv4 checksum for TSO */
7420 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
7421 IXGBE_TX_FLAGS_IPV4,
7422 IXGBE_ADVTXD_POPTS_IXSM);
7423
7424 /*
7425 * Check Context must be set if Tx switch is enabled, which it
7426 * always is for case where virtual functions are running
7427 */
7428 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
7429 IXGBE_TX_FLAGS_CC,
7430 IXGBE_ADVTXD_CC);
7431
7432 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
7433 }
7434
7435 static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
7436 {
7437 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
7438
7439 /* Herbert's original patch had:
7440 * smp_mb__after_netif_stop_queue();
7441 * but since that doesn't exist yet, just open code it.
7442 */
7443 smp_mb();
7444
7445 /* We need to check again in a case another CPU has just
7446 * made room available.
7447 */
7448 if (likely(ixgbe_desc_unused(tx_ring) < size))
7449 return -EBUSY;
7450
7451 /* A reprieve! - use start_queue because it doesn't call schedule */
7452 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
7453 ++tx_ring->tx_stats.restart_queue;
7454 return 0;
7455 }
7456
7457 static inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
7458 {
7459 if (likely(ixgbe_desc_unused(tx_ring) >= size))
7460 return 0;
7461
7462 return __ixgbe_maybe_stop_tx(tx_ring, size);
7463 }
7464
7465 #define IXGBE_TXD_CMD (IXGBE_TXD_CMD_EOP | \
7466 IXGBE_TXD_CMD_RS)
7467
7468 static void ixgbe_tx_map(struct ixgbe_ring *tx_ring,
7469 struct ixgbe_tx_buffer *first,
7470 const u8 hdr_len)
7471 {
7472 struct sk_buff *skb = first->skb;
7473 struct ixgbe_tx_buffer *tx_buffer;
7474 union ixgbe_adv_tx_desc *tx_desc;
7475 struct skb_frag_struct *frag;
7476 dma_addr_t dma;
7477 unsigned int data_len, size;
7478 u32 tx_flags = first->tx_flags;
7479 u32 cmd_type = ixgbe_tx_cmd_type(skb, tx_flags);
7480 u16 i = tx_ring->next_to_use;
7481
7482 tx_desc = IXGBE_TX_DESC(tx_ring, i);
7483
7484 ixgbe_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);
7485
7486 size = skb_headlen(skb);
7487 data_len = skb->data_len;
7488
7489 #ifdef IXGBE_FCOE
7490 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
7491 if (data_len < sizeof(struct fcoe_crc_eof)) {
7492 size -= sizeof(struct fcoe_crc_eof) - data_len;
7493 data_len = 0;
7494 } else {
7495 data_len -= sizeof(struct fcoe_crc_eof);
7496 }
7497 }
7498
7499 #endif
7500 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
7501
7502 tx_buffer = first;
7503
7504 for (frag = &skb_shinfo(skb)->frags[0];; frag++) {
7505 if (dma_mapping_error(tx_ring->dev, dma))
7506 goto dma_error;
7507
7508 /* record length, and DMA address */
7509 dma_unmap_len_set(tx_buffer, len, size);
7510 dma_unmap_addr_set(tx_buffer, dma, dma);
7511
7512 tx_desc->read.buffer_addr = cpu_to_le64(dma);
7513
7514 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
7515 tx_desc->read.cmd_type_len =
7516 cpu_to_le32(cmd_type ^ IXGBE_MAX_DATA_PER_TXD);
7517
7518 i++;
7519 tx_desc++;
7520 if (i == tx_ring->count) {
7521 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
7522 i = 0;
7523 }
7524 tx_desc->read.olinfo_status = 0;
7525
7526 dma += IXGBE_MAX_DATA_PER_TXD;
7527 size -= IXGBE_MAX_DATA_PER_TXD;
7528
7529 tx_desc->read.buffer_addr = cpu_to_le64(dma);
7530 }
7531
7532 if (likely(!data_len))
7533 break;
7534
7535 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type ^ size);
7536
7537 i++;
7538 tx_desc++;
7539 if (i == tx_ring->count) {
7540 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
7541 i = 0;
7542 }
7543 tx_desc->read.olinfo_status = 0;
7544
7545 #ifdef IXGBE_FCOE
7546 size = min_t(unsigned int, data_len, skb_frag_size(frag));
7547 #else
7548 size = skb_frag_size(frag);
7549 #endif
7550 data_len -= size;
7551
7552 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
7553 DMA_TO_DEVICE);
7554
7555 tx_buffer = &tx_ring->tx_buffer_info[i];
7556 }
7557
7558 /* write last descriptor with RS and EOP bits */
7559 cmd_type |= size | IXGBE_TXD_CMD;
7560 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
7561
7562 netdev_tx_sent_queue(txring_txq(tx_ring), first->bytecount);
7563
7564 /* set the timestamp */
7565 first->time_stamp = jiffies;
7566
7567 /*
7568 * Force memory writes to complete before letting h/w know there
7569 * are new descriptors to fetch. (Only applicable for weak-ordered
7570 * memory model archs, such as IA-64).
7571 *
7572 * We also need this memory barrier to make certain all of the
7573 * status bits have been updated before next_to_watch is written.
7574 */
7575 wmb();
7576
7577 /* set next_to_watch value indicating a packet is present */
7578 first->next_to_watch = tx_desc;
7579
7580 i++;
7581 if (i == tx_ring->count)
7582 i = 0;
7583
7584 tx_ring->next_to_use = i;
7585
7586 ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);
7587
7588 if (netif_xmit_stopped(txring_txq(tx_ring)) || !skb->xmit_more) {
7589 writel(i, tx_ring->tail);
7590
7591 /* we need this if more than one processor can write to our tail
7592 * at a time, it synchronizes IO on IA64/Altix systems
7593 */
7594 mmiowb();
7595 }
7596
7597 return;
7598 dma_error:
7599 dev_err(tx_ring->dev, "TX DMA map failed\n");
7600
7601 /* clear dma mappings for failed tx_buffer_info map */
7602 for (;;) {
7603 tx_buffer = &tx_ring->tx_buffer_info[i];
7604 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer);
7605 if (tx_buffer == first)
7606 break;
7607 if (i == 0)
7608 i = tx_ring->count;
7609 i--;
7610 }
7611
7612 tx_ring->next_to_use = i;
7613 }
7614
7615 static void ixgbe_atr(struct ixgbe_ring *ring,
7616 struct ixgbe_tx_buffer *first)
7617 {
7618 struct ixgbe_q_vector *q_vector = ring->q_vector;
7619 union ixgbe_atr_hash_dword input = { .dword = 0 };
7620 union ixgbe_atr_hash_dword common = { .dword = 0 };
7621 union {
7622 unsigned char *network;
7623 struct iphdr *ipv4;
7624 struct ipv6hdr *ipv6;
7625 } hdr;
7626 struct tcphdr *th;
7627 unsigned int hlen;
7628 struct sk_buff *skb;
7629 __be16 vlan_id;
7630 int l4_proto;
7631
7632 /* if ring doesn't have a interrupt vector, cannot perform ATR */
7633 if (!q_vector)
7634 return;
7635
7636 /* do nothing if sampling is disabled */
7637 if (!ring->atr_sample_rate)
7638 return;
7639
7640 ring->atr_count++;
7641
7642 /* currently only IPv4/IPv6 with TCP is supported */
7643 if ((first->protocol != htons(ETH_P_IP)) &&
7644 (first->protocol != htons(ETH_P_IPV6)))
7645 return;
7646
7647 /* snag network header to get L4 type and address */
7648 skb = first->skb;
7649 hdr.network = skb_network_header(skb);
7650 #ifdef CONFIG_IXGBE_VXLAN
7651 if (skb->encapsulation &&
7652 first->protocol == htons(ETH_P_IP) &&
7653 hdr.ipv4->protocol != IPPROTO_UDP) {
7654 struct ixgbe_adapter *adapter = q_vector->adapter;
7655
7656 /* verify the port is recognized as VXLAN */
7657 if (adapter->vxlan_port &&
7658 udp_hdr(skb)->dest == adapter->vxlan_port)
7659 hdr.network = skb_inner_network_header(skb);
7660 }
7661 #endif /* CONFIG_IXGBE_VXLAN */
7662
7663 /* Currently only IPv4/IPv6 with TCP is supported */
7664 switch (hdr.ipv4->version) {
7665 case IPVERSION:
7666 /* access ihl as u8 to avoid unaligned access on ia64 */
7667 hlen = (hdr.network[0] & 0x0F) << 2;
7668 l4_proto = hdr.ipv4->protocol;
7669 break;
7670 case 6:
7671 hlen = hdr.network - skb->data;
7672 l4_proto = ipv6_find_hdr(skb, &hlen, IPPROTO_TCP, NULL, NULL);
7673 hlen -= hdr.network - skb->data;
7674 break;
7675 default:
7676 return;
7677 }
7678
7679 if (l4_proto != IPPROTO_TCP)
7680 return;
7681
7682 th = (struct tcphdr *)(hdr.network + hlen);
7683
7684 /* skip this packet since the socket is closing */
7685 if (th->fin)
7686 return;
7687
7688 /* sample on all syn packets or once every atr sample count */
7689 if (!th->syn && (ring->atr_count < ring->atr_sample_rate))
7690 return;
7691
7692 /* reset sample count */
7693 ring->atr_count = 0;
7694
7695 vlan_id = htons(first->tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT);
7696
7697 /*
7698 * src and dst are inverted, think how the receiver sees them
7699 *
7700 * The input is broken into two sections, a non-compressed section
7701 * containing vm_pool, vlan_id, and flow_type. The rest of the data
7702 * is XORed together and stored in the compressed dword.
7703 */
7704 input.formatted.vlan_id = vlan_id;
7705
7706 /*
7707 * since src port and flex bytes occupy the same word XOR them together
7708 * and write the value to source port portion of compressed dword
7709 */
7710 if (first->tx_flags & (IXGBE_TX_FLAGS_SW_VLAN | IXGBE_TX_FLAGS_HW_VLAN))
7711 common.port.src ^= th->dest ^ htons(ETH_P_8021Q);
7712 else
7713 common.port.src ^= th->dest ^ first->protocol;
7714 common.port.dst ^= th->source;
7715
7716 switch (hdr.ipv4->version) {
7717 case IPVERSION:
7718 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4;
7719 common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr;
7720 break;
7721 case 6:
7722 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6;
7723 common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^
7724 hdr.ipv6->saddr.s6_addr32[1] ^
7725 hdr.ipv6->saddr.s6_addr32[2] ^
7726 hdr.ipv6->saddr.s6_addr32[3] ^
7727 hdr.ipv6->daddr.s6_addr32[0] ^
7728 hdr.ipv6->daddr.s6_addr32[1] ^
7729 hdr.ipv6->daddr.s6_addr32[2] ^
7730 hdr.ipv6->daddr.s6_addr32[3];
7731 break;
7732 default:
7733 break;
7734 }
7735
7736 if (hdr.network != skb_network_header(skb))
7737 input.formatted.flow_type |= IXGBE_ATR_L4TYPE_TUNNEL_MASK;
7738
7739 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
7740 ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw,
7741 input, common, ring->queue_index);
7742 }
7743
7744 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb,
7745 void *accel_priv, select_queue_fallback_t fallback)
7746 {
7747 struct ixgbe_fwd_adapter *fwd_adapter = accel_priv;
7748 #ifdef IXGBE_FCOE
7749 struct ixgbe_adapter *adapter;
7750 struct ixgbe_ring_feature *f;
7751 int txq;
7752 #endif
7753
7754 if (fwd_adapter)
7755 return skb->queue_mapping + fwd_adapter->tx_base_queue;
7756
7757 #ifdef IXGBE_FCOE
7758
7759 /*
7760 * only execute the code below if protocol is FCoE
7761 * or FIP and we have FCoE enabled on the adapter
7762 */
7763 switch (vlan_get_protocol(skb)) {
7764 case htons(ETH_P_FCOE):
7765 case htons(ETH_P_FIP):
7766 adapter = netdev_priv(dev);
7767
7768 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
7769 break;
7770 default:
7771 return fallback(dev, skb);
7772 }
7773
7774 f = &adapter->ring_feature[RING_F_FCOE];
7775
7776 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) :
7777 smp_processor_id();
7778
7779 while (txq >= f->indices)
7780 txq -= f->indices;
7781
7782 return txq + f->offset;
7783 #else
7784 return fallback(dev, skb);
7785 #endif
7786 }
7787
7788 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
7789 struct ixgbe_adapter *adapter,
7790 struct ixgbe_ring *tx_ring)
7791 {
7792 struct ixgbe_tx_buffer *first;
7793 int tso;
7794 u32 tx_flags = 0;
7795 unsigned short f;
7796 u16 count = TXD_USE_COUNT(skb_headlen(skb));
7797 __be16 protocol = skb->protocol;
7798 u8 hdr_len = 0;
7799
7800 /*
7801 * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
7802 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
7803 * + 2 desc gap to keep tail from touching head,
7804 * + 1 desc for context descriptor,
7805 * otherwise try next time
7806 */
7807 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
7808 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
7809
7810 if (ixgbe_maybe_stop_tx(tx_ring, count + 3)) {
7811 tx_ring->tx_stats.tx_busy++;
7812 return NETDEV_TX_BUSY;
7813 }
7814
7815 /* record the location of the first descriptor for this packet */
7816 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
7817 first->skb = skb;
7818 first->bytecount = skb->len;
7819 first->gso_segs = 1;
7820
7821 /* if we have a HW VLAN tag being added default to the HW one */
7822 if (skb_vlan_tag_present(skb)) {
7823 tx_flags |= skb_vlan_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT;
7824 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
7825 /* else if it is a SW VLAN check the next protocol and store the tag */
7826 } else if (protocol == htons(ETH_P_8021Q)) {
7827 struct vlan_hdr *vhdr, _vhdr;
7828 vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(_vhdr), &_vhdr);
7829 if (!vhdr)
7830 goto out_drop;
7831
7832 tx_flags |= ntohs(vhdr->h_vlan_TCI) <<
7833 IXGBE_TX_FLAGS_VLAN_SHIFT;
7834 tx_flags |= IXGBE_TX_FLAGS_SW_VLAN;
7835 }
7836 protocol = vlan_get_protocol(skb);
7837
7838 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
7839 adapter->ptp_clock &&
7840 !test_and_set_bit_lock(__IXGBE_PTP_TX_IN_PROGRESS,
7841 &adapter->state)) {
7842 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
7843 tx_flags |= IXGBE_TX_FLAGS_TSTAMP;
7844
7845 /* schedule check for Tx timestamp */
7846 adapter->ptp_tx_skb = skb_get(skb);
7847 adapter->ptp_tx_start = jiffies;
7848 schedule_work(&adapter->ptp_tx_work);
7849 }
7850
7851 skb_tx_timestamp(skb);
7852
7853 #ifdef CONFIG_PCI_IOV
7854 /*
7855 * Use the l2switch_enable flag - would be false if the DMA
7856 * Tx switch had been disabled.
7857 */
7858 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7859 tx_flags |= IXGBE_TX_FLAGS_CC;
7860
7861 #endif
7862 /* DCB maps skb priorities 0-7 onto 3 bit PCP of VLAN tag. */
7863 if ((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
7864 ((tx_flags & (IXGBE_TX_FLAGS_HW_VLAN | IXGBE_TX_FLAGS_SW_VLAN)) ||
7865 (skb->priority != TC_PRIO_CONTROL))) {
7866 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
7867 tx_flags |= (skb->priority & 0x7) <<
7868 IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT;
7869 if (tx_flags & IXGBE_TX_FLAGS_SW_VLAN) {
7870 struct vlan_ethhdr *vhdr;
7871
7872 if (skb_cow_head(skb, 0))
7873 goto out_drop;
7874 vhdr = (struct vlan_ethhdr *)skb->data;
7875 vhdr->h_vlan_TCI = htons(tx_flags >>
7876 IXGBE_TX_FLAGS_VLAN_SHIFT);
7877 } else {
7878 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
7879 }
7880 }
7881
7882 /* record initial flags and protocol */
7883 first->tx_flags = tx_flags;
7884 first->protocol = protocol;
7885
7886 #ifdef IXGBE_FCOE
7887 /* setup tx offload for FCoE */
7888 if ((protocol == htons(ETH_P_FCOE)) &&
7889 (tx_ring->netdev->features & (NETIF_F_FSO | NETIF_F_FCOE_CRC))) {
7890 tso = ixgbe_fso(tx_ring, first, &hdr_len);
7891 if (tso < 0)
7892 goto out_drop;
7893
7894 goto xmit_fcoe;
7895 }
7896
7897 #endif /* IXGBE_FCOE */
7898 tso = ixgbe_tso(tx_ring, first, &hdr_len);
7899 if (tso < 0)
7900 goto out_drop;
7901 else if (!tso)
7902 ixgbe_tx_csum(tx_ring, first);
7903
7904 /* add the ATR filter if ATR is on */
7905 if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state))
7906 ixgbe_atr(tx_ring, first);
7907
7908 #ifdef IXGBE_FCOE
7909 xmit_fcoe:
7910 #endif /* IXGBE_FCOE */
7911 ixgbe_tx_map(tx_ring, first, hdr_len);
7912
7913 return NETDEV_TX_OK;
7914
7915 out_drop:
7916 dev_kfree_skb_any(first->skb);
7917 first->skb = NULL;
7918
7919 return NETDEV_TX_OK;
7920 }
7921
7922 static netdev_tx_t __ixgbe_xmit_frame(struct sk_buff *skb,
7923 struct net_device *netdev,
7924 struct ixgbe_ring *ring)
7925 {
7926 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7927 struct ixgbe_ring *tx_ring;
7928
7929 /*
7930 * The minimum packet size for olinfo paylen is 17 so pad the skb
7931 * in order to meet this minimum size requirement.
7932 */
7933 if (skb_put_padto(skb, 17))
7934 return NETDEV_TX_OK;
7935
7936 tx_ring = ring ? ring : adapter->tx_ring[skb->queue_mapping];
7937
7938 return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
7939 }
7940
7941 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
7942 struct net_device *netdev)
7943 {
7944 return __ixgbe_xmit_frame(skb, netdev, NULL);
7945 }
7946
7947 /**
7948 * ixgbe_set_mac - Change the Ethernet Address of the NIC
7949 * @netdev: network interface device structure
7950 * @p: pointer to an address structure
7951 *
7952 * Returns 0 on success, negative on failure
7953 **/
7954 static int ixgbe_set_mac(struct net_device *netdev, void *p)
7955 {
7956 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7957 struct ixgbe_hw *hw = &adapter->hw;
7958 struct sockaddr *addr = p;
7959
7960 if (!is_valid_ether_addr(addr->sa_data))
7961 return -EADDRNOTAVAIL;
7962
7963 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
7964 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
7965
7966 ixgbe_mac_set_default_filter(adapter);
7967
7968 return 0;
7969 }
7970
7971 static int
7972 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
7973 {
7974 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7975 struct ixgbe_hw *hw = &adapter->hw;
7976 u16 value;
7977 int rc;
7978
7979 if (prtad != hw->phy.mdio.prtad)
7980 return -EINVAL;
7981 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
7982 if (!rc)
7983 rc = value;
7984 return rc;
7985 }
7986
7987 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
7988 u16 addr, u16 value)
7989 {
7990 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7991 struct ixgbe_hw *hw = &adapter->hw;
7992
7993 if (prtad != hw->phy.mdio.prtad)
7994 return -EINVAL;
7995 return hw->phy.ops.write_reg(hw, addr, devad, value);
7996 }
7997
7998 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
7999 {
8000 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8001
8002 switch (cmd) {
8003 case SIOCSHWTSTAMP:
8004 return ixgbe_ptp_set_ts_config(adapter, req);
8005 case SIOCGHWTSTAMP:
8006 return ixgbe_ptp_get_ts_config(adapter, req);
8007 default:
8008 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
8009 }
8010 }
8011
8012 /**
8013 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
8014 * netdev->dev_addrs
8015 * @netdev: network interface device structure
8016 *
8017 * Returns non-zero on failure
8018 **/
8019 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
8020 {
8021 int err = 0;
8022 struct ixgbe_adapter *adapter = netdev_priv(dev);
8023 struct ixgbe_hw *hw = &adapter->hw;
8024
8025 if (is_valid_ether_addr(hw->mac.san_addr)) {
8026 rtnl_lock();
8027 err = dev_addr_add(dev, hw->mac.san_addr, NETDEV_HW_ADDR_T_SAN);
8028 rtnl_unlock();
8029
8030 /* update SAN MAC vmdq pool selection */
8031 hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));
8032 }
8033 return err;
8034 }
8035
8036 /**
8037 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
8038 * netdev->dev_addrs
8039 * @netdev: network interface device structure
8040 *
8041 * Returns non-zero on failure
8042 **/
8043 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
8044 {
8045 int err = 0;
8046 struct ixgbe_adapter *adapter = netdev_priv(dev);
8047 struct ixgbe_mac_info *mac = &adapter->hw.mac;
8048
8049 if (is_valid_ether_addr(mac->san_addr)) {
8050 rtnl_lock();
8051 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
8052 rtnl_unlock();
8053 }
8054 return err;
8055 }
8056
8057 #ifdef CONFIG_NET_POLL_CONTROLLER
8058 /*
8059 * Polling 'interrupt' - used by things like netconsole to send skbs
8060 * without having to re-enable interrupts. It's not called while
8061 * the interrupt routine is executing.
8062 */
8063 static void ixgbe_netpoll(struct net_device *netdev)
8064 {
8065 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8066 int i;
8067
8068 /* if interface is down do nothing */
8069 if (test_bit(__IXGBE_DOWN, &adapter->state))
8070 return;
8071
8072 /* loop through and schedule all active queues */
8073 for (i = 0; i < adapter->num_q_vectors; i++)
8074 ixgbe_msix_clean_rings(0, adapter->q_vector[i]);
8075 }
8076
8077 #endif
8078 static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
8079 struct rtnl_link_stats64 *stats)
8080 {
8081 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8082 int i;
8083
8084 rcu_read_lock();
8085 for (i = 0; i < adapter->num_rx_queues; i++) {
8086 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]);
8087 u64 bytes, packets;
8088 unsigned int start;
8089
8090 if (ring) {
8091 do {
8092 start = u64_stats_fetch_begin_irq(&ring->syncp);
8093 packets = ring->stats.packets;
8094 bytes = ring->stats.bytes;
8095 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
8096 stats->rx_packets += packets;
8097 stats->rx_bytes += bytes;
8098 }
8099 }
8100
8101 for (i = 0; i < adapter->num_tx_queues; i++) {
8102 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->tx_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->tx_packets += packets;
8113 stats->tx_bytes += bytes;
8114 }
8115 }
8116 rcu_read_unlock();
8117 /* following stats updated by ixgbe_watchdog_task() */
8118 stats->multicast = netdev->stats.multicast;
8119 stats->rx_errors = netdev->stats.rx_errors;
8120 stats->rx_length_errors = netdev->stats.rx_length_errors;
8121 stats->rx_crc_errors = netdev->stats.rx_crc_errors;
8122 stats->rx_missed_errors = netdev->stats.rx_missed_errors;
8123 return stats;
8124 }
8125
8126 #ifdef CONFIG_IXGBE_DCB
8127 /**
8128 * ixgbe_validate_rtr - verify 802.1Qp to Rx packet buffer mapping is valid.
8129 * @adapter: pointer to ixgbe_adapter
8130 * @tc: number of traffic classes currently enabled
8131 *
8132 * Configure a valid 802.1Qp to Rx packet buffer mapping ie confirm
8133 * 802.1Q priority maps to a packet buffer that exists.
8134 */
8135 static void ixgbe_validate_rtr(struct ixgbe_adapter *adapter, u8 tc)
8136 {
8137 struct ixgbe_hw *hw = &adapter->hw;
8138 u32 reg, rsave;
8139 int i;
8140
8141 /* 82598 have a static priority to TC mapping that can not
8142 * be changed so no validation is needed.
8143 */
8144 if (hw->mac.type == ixgbe_mac_82598EB)
8145 return;
8146
8147 reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC);
8148 rsave = reg;
8149
8150 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
8151 u8 up2tc = reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT);
8152
8153 /* If up2tc is out of bounds default to zero */
8154 if (up2tc > tc)
8155 reg &= ~(0x7 << IXGBE_RTRUP2TC_UP_SHIFT);
8156 }
8157
8158 if (reg != rsave)
8159 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
8160
8161 return;
8162 }
8163
8164 /**
8165 * ixgbe_set_prio_tc_map - Configure netdev prio tc map
8166 * @adapter: Pointer to adapter struct
8167 *
8168 * Populate the netdev user priority to tc map
8169 */
8170 static void ixgbe_set_prio_tc_map(struct ixgbe_adapter *adapter)
8171 {
8172 struct net_device *dev = adapter->netdev;
8173 struct ixgbe_dcb_config *dcb_cfg = &adapter->dcb_cfg;
8174 struct ieee_ets *ets = adapter->ixgbe_ieee_ets;
8175 u8 prio;
8176
8177 for (prio = 0; prio < MAX_USER_PRIORITY; prio++) {
8178 u8 tc = 0;
8179
8180 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE)
8181 tc = ixgbe_dcb_get_tc_from_up(dcb_cfg, 0, prio);
8182 else if (ets)
8183 tc = ets->prio_tc[prio];
8184
8185 netdev_set_prio_tc_map(dev, prio, tc);
8186 }
8187 }
8188
8189 #endif /* CONFIG_IXGBE_DCB */
8190 /**
8191 * ixgbe_setup_tc - configure net_device for multiple traffic classes
8192 *
8193 * @netdev: net device to configure
8194 * @tc: number of traffic classes to enable
8195 */
8196 int ixgbe_setup_tc(struct net_device *dev, u8 tc)
8197 {
8198 struct ixgbe_adapter *adapter = netdev_priv(dev);
8199 struct ixgbe_hw *hw = &adapter->hw;
8200 bool pools;
8201
8202 /* Hardware supports up to 8 traffic classes */
8203 if (tc > adapter->dcb_cfg.num_tcs.pg_tcs)
8204 return -EINVAL;
8205
8206 if (hw->mac.type == ixgbe_mac_82598EB && tc && tc < MAX_TRAFFIC_CLASS)
8207 return -EINVAL;
8208
8209 pools = (find_first_zero_bit(&adapter->fwd_bitmask, 32) > 1);
8210 if (tc && pools && adapter->num_rx_pools > IXGBE_MAX_DCBMACVLANS)
8211 return -EBUSY;
8212
8213 /* Hardware has to reinitialize queues and interrupts to
8214 * match packet buffer alignment. Unfortunately, the
8215 * hardware is not flexible enough to do this dynamically.
8216 */
8217 if (netif_running(dev))
8218 ixgbe_close(dev);
8219 else
8220 ixgbe_reset(adapter);
8221
8222 ixgbe_clear_interrupt_scheme(adapter);
8223
8224 #ifdef CONFIG_IXGBE_DCB
8225 if (tc) {
8226 netdev_set_num_tc(dev, tc);
8227 ixgbe_set_prio_tc_map(adapter);
8228
8229 adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
8230
8231 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
8232 adapter->last_lfc_mode = adapter->hw.fc.requested_mode;
8233 adapter->hw.fc.requested_mode = ixgbe_fc_none;
8234 }
8235 } else {
8236 netdev_reset_tc(dev);
8237
8238 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
8239 adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
8240
8241 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
8242
8243 adapter->temp_dcb_cfg.pfc_mode_enable = false;
8244 adapter->dcb_cfg.pfc_mode_enable = false;
8245 }
8246
8247 ixgbe_validate_rtr(adapter, tc);
8248
8249 #endif /* CONFIG_IXGBE_DCB */
8250 ixgbe_init_interrupt_scheme(adapter);
8251
8252 if (netif_running(dev))
8253 return ixgbe_open(dev);
8254
8255 return 0;
8256 }
8257
8258 static int ixgbe_delete_clsu32(struct ixgbe_adapter *adapter,
8259 struct tc_cls_u32_offload *cls)
8260 {
8261 u32 uhtid = TC_U32_USERHTID(cls->knode.handle);
8262 u32 loc;
8263 int err;
8264
8265 if ((uhtid != 0x800) && (uhtid >= IXGBE_MAX_LINK_HANDLE))
8266 return -EINVAL;
8267
8268 loc = cls->knode.handle & 0xfffff;
8269
8270 spin_lock(&adapter->fdir_perfect_lock);
8271 err = ixgbe_update_ethtool_fdir_entry(adapter, NULL, loc);
8272 spin_unlock(&adapter->fdir_perfect_lock);
8273 return err;
8274 }
8275
8276 static int ixgbe_configure_clsu32_add_hnode(struct ixgbe_adapter *adapter,
8277 __be16 protocol,
8278 struct tc_cls_u32_offload *cls)
8279 {
8280 u32 uhtid = TC_U32_USERHTID(cls->hnode.handle);
8281
8282 if (uhtid >= IXGBE_MAX_LINK_HANDLE)
8283 return -EINVAL;
8284
8285 /* This ixgbe devices do not support hash tables at the moment
8286 * so abort when given hash tables.
8287 */
8288 if (cls->hnode.divisor > 0)
8289 return -EINVAL;
8290
8291 set_bit(uhtid - 1, &adapter->tables);
8292 return 0;
8293 }
8294
8295 static int ixgbe_configure_clsu32_del_hnode(struct ixgbe_adapter *adapter,
8296 struct tc_cls_u32_offload *cls)
8297 {
8298 u32 uhtid = TC_U32_USERHTID(cls->hnode.handle);
8299
8300 if (uhtid >= IXGBE_MAX_LINK_HANDLE)
8301 return -EINVAL;
8302
8303 clear_bit(uhtid - 1, &adapter->tables);
8304 return 0;
8305 }
8306
8307 static int ixgbe_configure_clsu32(struct ixgbe_adapter *adapter,
8308 __be16 protocol,
8309 struct tc_cls_u32_offload *cls)
8310 {
8311 u32 loc = cls->knode.handle & 0xfffff;
8312 struct ixgbe_hw *hw = &adapter->hw;
8313 struct ixgbe_mat_field *field_ptr;
8314 struct ixgbe_fdir_filter *input;
8315 union ixgbe_atr_input mask;
8316 #ifdef CONFIG_NET_CLS_ACT
8317 const struct tc_action *a;
8318 #endif
8319 int i, err = 0;
8320 u8 queue;
8321 u32 uhtid, link_uhtid;
8322
8323 memset(&mask, 0, sizeof(union ixgbe_atr_input));
8324 uhtid = TC_U32_USERHTID(cls->knode.handle);
8325 link_uhtid = TC_U32_USERHTID(cls->knode.link_handle);
8326
8327 /* At the moment cls_u32 jumps to network layer and skips past
8328 * L2 headers. The canonical method to match L2 frames is to use
8329 * negative values. However this is error prone at best but really
8330 * just broken because there is no way to "know" what sort of hdr
8331 * is in front of the network layer. Fix cls_u32 to support L2
8332 * headers when needed.
8333 */
8334 if (protocol != htons(ETH_P_IP))
8335 return -EINVAL;
8336
8337 if (link_uhtid) {
8338 struct ixgbe_nexthdr *nexthdr = ixgbe_ipv4_jumps;
8339
8340 if (link_uhtid >= IXGBE_MAX_LINK_HANDLE)
8341 return -EINVAL;
8342
8343 if (!test_bit(link_uhtid - 1, &adapter->tables))
8344 return -EINVAL;
8345
8346 for (i = 0; nexthdr[i].jump; i++) {
8347 if (nexthdr[i].o != cls->knode.sel->offoff ||
8348 nexthdr[i].s != cls->knode.sel->offshift ||
8349 nexthdr[i].m != cls->knode.sel->offmask ||
8350 /* do not support multiple key jumps its just mad */
8351 cls->knode.sel->nkeys > 1)
8352 return -EINVAL;
8353
8354 if (nexthdr[i].off == cls->knode.sel->keys[0].off &&
8355 nexthdr[i].val == cls->knode.sel->keys[0].val &&
8356 nexthdr[i].mask == cls->knode.sel->keys[0].mask) {
8357 adapter->jump_tables[link_uhtid] =
8358 nexthdr[i].jump;
8359 break;
8360 }
8361 }
8362 return 0;
8363 }
8364
8365 if (loc >= ((1024 << adapter->fdir_pballoc) - 2)) {
8366 e_err(drv, "Location out of range\n");
8367 return -EINVAL;
8368 }
8369
8370 /* cls u32 is a graph starting at root node 0x800. The driver tracks
8371 * links and also the fields used to advance the parser across each
8372 * link (e.g. nexthdr/eat parameters from 'tc'). This way we can map
8373 * the u32 graph onto the hardware parse graph denoted in ixgbe_model.h
8374 * To add support for new nodes update ixgbe_model.h parse structures
8375 * this function _should_ be generic try not to hardcode values here.
8376 */
8377 if (uhtid == 0x800) {
8378 field_ptr = adapter->jump_tables[0];
8379 } else {
8380 if (uhtid >= IXGBE_MAX_LINK_HANDLE)
8381 return -EINVAL;
8382
8383 field_ptr = adapter->jump_tables[uhtid];
8384 }
8385
8386 if (!field_ptr)
8387 return -EINVAL;
8388
8389 input = kzalloc(sizeof(*input), GFP_KERNEL);
8390 if (!input)
8391 return -ENOMEM;
8392
8393 for (i = 0; i < cls->knode.sel->nkeys; i++) {
8394 int off = cls->knode.sel->keys[i].off;
8395 __be32 val = cls->knode.sel->keys[i].val;
8396 __be32 m = cls->knode.sel->keys[i].mask;
8397 bool found_entry = false;
8398 int j;
8399
8400 for (j = 0; field_ptr[j].val; j++) {
8401 if (field_ptr[j].off == off) {
8402 field_ptr[j].val(input, &mask, val, m);
8403 input->filter.formatted.flow_type |=
8404 field_ptr[j].type;
8405 found_entry = true;
8406 break;
8407 }
8408 }
8409
8410 if (!found_entry)
8411 goto err_out;
8412 }
8413
8414 mask.formatted.flow_type = IXGBE_ATR_L4TYPE_IPV6_MASK |
8415 IXGBE_ATR_L4TYPE_MASK;
8416
8417 if (input->filter.formatted.flow_type == IXGBE_ATR_FLOW_TYPE_IPV4)
8418 mask.formatted.flow_type &= IXGBE_ATR_L4TYPE_IPV6_MASK;
8419
8420 #ifdef CONFIG_NET_CLS_ACT
8421 if (list_empty(&cls->knode.exts->actions))
8422 goto err_out;
8423
8424 list_for_each_entry(a, &cls->knode.exts->actions, list) {
8425 if (!is_tcf_gact_shot(a))
8426 goto err_out;
8427 }
8428 #endif
8429
8430 input->action = IXGBE_FDIR_DROP_QUEUE;
8431 queue = IXGBE_FDIR_DROP_QUEUE;
8432 input->sw_idx = loc;
8433
8434 spin_lock(&adapter->fdir_perfect_lock);
8435
8436 if (hlist_empty(&adapter->fdir_filter_list)) {
8437 memcpy(&adapter->fdir_mask, &mask, sizeof(mask));
8438 err = ixgbe_fdir_set_input_mask_82599(hw, &mask);
8439 if (err)
8440 goto err_out_w_lock;
8441 } else if (memcmp(&adapter->fdir_mask, &mask, sizeof(mask))) {
8442 err = -EINVAL;
8443 goto err_out_w_lock;
8444 }
8445
8446 ixgbe_atr_compute_perfect_hash_82599(&input->filter, &mask);
8447 err = ixgbe_fdir_write_perfect_filter_82599(hw, &input->filter,
8448 input->sw_idx, queue);
8449 if (!err)
8450 ixgbe_update_ethtool_fdir_entry(adapter, input, input->sw_idx);
8451 spin_unlock(&adapter->fdir_perfect_lock);
8452
8453 return err;
8454 err_out_w_lock:
8455 spin_unlock(&adapter->fdir_perfect_lock);
8456 err_out:
8457 kfree(input);
8458 return -EINVAL;
8459 }
8460
8461 static int __ixgbe_setup_tc(struct net_device *dev, u32 handle, __be16 proto,
8462 struct tc_to_netdev *tc)
8463 {
8464 struct ixgbe_adapter *adapter = netdev_priv(dev);
8465
8466 if (TC_H_MAJ(handle) == TC_H_MAJ(TC_H_INGRESS) &&
8467 tc->type == TC_SETUP_CLSU32) {
8468 switch (tc->cls_u32->command) {
8469 case TC_CLSU32_NEW_KNODE:
8470 case TC_CLSU32_REPLACE_KNODE:
8471 return ixgbe_configure_clsu32(adapter,
8472 proto, tc->cls_u32);
8473 case TC_CLSU32_DELETE_KNODE:
8474 return ixgbe_delete_clsu32(adapter, tc->cls_u32);
8475 case TC_CLSU32_NEW_HNODE:
8476 case TC_CLSU32_REPLACE_HNODE:
8477 return ixgbe_configure_clsu32_add_hnode(adapter, proto,
8478 tc->cls_u32);
8479 case TC_CLSU32_DELETE_HNODE:
8480 return ixgbe_configure_clsu32_del_hnode(adapter,
8481 tc->cls_u32);
8482 default:
8483 return -EINVAL;
8484 }
8485 }
8486
8487 if (tc->type != TC_SETUP_MQPRIO)
8488 return -EINVAL;
8489
8490 return ixgbe_setup_tc(dev, tc->tc);
8491 }
8492
8493 #ifdef CONFIG_PCI_IOV
8494 void ixgbe_sriov_reinit(struct ixgbe_adapter *adapter)
8495 {
8496 struct net_device *netdev = adapter->netdev;
8497
8498 rtnl_lock();
8499 ixgbe_setup_tc(netdev, netdev_get_num_tc(netdev));
8500 rtnl_unlock();
8501 }
8502
8503 #endif
8504 void ixgbe_do_reset(struct net_device *netdev)
8505 {
8506 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8507
8508 if (netif_running(netdev))
8509 ixgbe_reinit_locked(adapter);
8510 else
8511 ixgbe_reset(adapter);
8512 }
8513
8514 static netdev_features_t ixgbe_fix_features(struct net_device *netdev,
8515 netdev_features_t features)
8516 {
8517 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8518
8519 /* If Rx checksum is disabled, then RSC/LRO should also be disabled */
8520 if (!(features & NETIF_F_RXCSUM))
8521 features &= ~NETIF_F_LRO;
8522
8523 /* Turn off LRO if not RSC capable */
8524 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE))
8525 features &= ~NETIF_F_LRO;
8526
8527 return features;
8528 }
8529
8530 static int ixgbe_set_features(struct net_device *netdev,
8531 netdev_features_t features)
8532 {
8533 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8534 netdev_features_t changed = netdev->features ^ features;
8535 bool need_reset = false;
8536
8537 /* Make sure RSC matches LRO, reset if change */
8538 if (!(features & NETIF_F_LRO)) {
8539 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
8540 need_reset = true;
8541 adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED;
8542 } else if ((adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) &&
8543 !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)) {
8544 if (adapter->rx_itr_setting == 1 ||
8545 adapter->rx_itr_setting > IXGBE_MIN_RSC_ITR) {
8546 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
8547 need_reset = true;
8548 } else if ((changed ^ features) & NETIF_F_LRO) {
8549 e_info(probe, "rx-usecs set too low, "
8550 "disabling RSC\n");
8551 }
8552 }
8553
8554 /*
8555 * Check if Flow Director n-tuple support or hw_tc support was
8556 * enabled or disabled. If the state changed, we need to reset.
8557 */
8558 if ((features & NETIF_F_NTUPLE) || (features & NETIF_F_HW_TC)) {
8559 /* turn off ATR, enable perfect filters and reset */
8560 if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
8561 need_reset = true;
8562
8563 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
8564 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
8565 } else {
8566 /* turn off perfect filters, enable ATR and reset */
8567 if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
8568 need_reset = true;
8569
8570 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
8571
8572 /* We cannot enable ATR if SR-IOV is enabled */
8573 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED ||
8574 /* We cannot enable ATR if we have 2 or more tcs */
8575 (netdev_get_num_tc(netdev) > 1) ||
8576 /* We cannot enable ATR if RSS is disabled */
8577 (adapter->ring_feature[RING_F_RSS].limit <= 1) ||
8578 /* A sample rate of 0 indicates ATR disabled */
8579 (!adapter->atr_sample_rate))
8580 ; /* do nothing not supported */
8581 else /* otherwise supported and set the flag */
8582 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
8583 }
8584
8585 if (changed & NETIF_F_RXALL)
8586 need_reset = true;
8587
8588 netdev->features = features;
8589
8590 #ifdef CONFIG_IXGBE_VXLAN
8591 if ((adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE)) {
8592 if (features & NETIF_F_RXCSUM)
8593 adapter->flags2 |= IXGBE_FLAG2_VXLAN_REREG_NEEDED;
8594 else
8595 ixgbe_clear_vxlan_port(adapter);
8596 }
8597 #endif /* CONFIG_IXGBE_VXLAN */
8598
8599 if (need_reset)
8600 ixgbe_do_reset(netdev);
8601 else if (changed & (NETIF_F_HW_VLAN_CTAG_RX |
8602 NETIF_F_HW_VLAN_CTAG_FILTER))
8603 ixgbe_set_rx_mode(netdev);
8604
8605 return 0;
8606 }
8607
8608 #ifdef CONFIG_IXGBE_VXLAN
8609 /**
8610 * ixgbe_add_vxlan_port - Get notifications about VXLAN ports that come up
8611 * @dev: The port's netdev
8612 * @sa_family: Socket Family that VXLAN is notifiying us about
8613 * @port: New UDP port number that VXLAN started listening to
8614 **/
8615 static void ixgbe_add_vxlan_port(struct net_device *dev, sa_family_t sa_family,
8616 __be16 port)
8617 {
8618 struct ixgbe_adapter *adapter = netdev_priv(dev);
8619 struct ixgbe_hw *hw = &adapter->hw;
8620
8621 if (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE))
8622 return;
8623
8624 if (sa_family == AF_INET6)
8625 return;
8626
8627 if (adapter->vxlan_port == port)
8628 return;
8629
8630 if (adapter->vxlan_port) {
8631 netdev_info(dev,
8632 "Hit Max num of VXLAN ports, not adding port %d\n",
8633 ntohs(port));
8634 return;
8635 }
8636
8637 adapter->vxlan_port = port;
8638 IXGBE_WRITE_REG(hw, IXGBE_VXLANCTRL, ntohs(port));
8639 }
8640
8641 /**
8642 * ixgbe_del_vxlan_port - Get notifications about VXLAN ports that go away
8643 * @dev: The port's netdev
8644 * @sa_family: Socket Family that VXLAN is notifying us about
8645 * @port: UDP port number that VXLAN stopped listening to
8646 **/
8647 static void ixgbe_del_vxlan_port(struct net_device *dev, sa_family_t sa_family,
8648 __be16 port)
8649 {
8650 struct ixgbe_adapter *adapter = netdev_priv(dev);
8651
8652 if (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE))
8653 return;
8654
8655 if (sa_family == AF_INET6)
8656 return;
8657
8658 if (adapter->vxlan_port != port) {
8659 netdev_info(dev, "Port %d was not found, not deleting\n",
8660 ntohs(port));
8661 return;
8662 }
8663
8664 ixgbe_clear_vxlan_port(adapter);
8665 adapter->flags2 |= IXGBE_FLAG2_VXLAN_REREG_NEEDED;
8666 }
8667 #endif /* CONFIG_IXGBE_VXLAN */
8668
8669 static int ixgbe_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
8670 struct net_device *dev,
8671 const unsigned char *addr, u16 vid,
8672 u16 flags)
8673 {
8674 /* guarantee we can provide a unique filter for the unicast address */
8675 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) {
8676 struct ixgbe_adapter *adapter = netdev_priv(dev);
8677 u16 pool = VMDQ_P(0);
8678
8679 if (netdev_uc_count(dev) >= ixgbe_available_rars(adapter, pool))
8680 return -ENOMEM;
8681 }
8682
8683 return ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, flags);
8684 }
8685
8686 /**
8687 * ixgbe_configure_bridge_mode - set various bridge modes
8688 * @adapter - the private structure
8689 * @mode - requested bridge mode
8690 *
8691 * Configure some settings require for various bridge modes.
8692 **/
8693 static int ixgbe_configure_bridge_mode(struct ixgbe_adapter *adapter,
8694 __u16 mode)
8695 {
8696 struct ixgbe_hw *hw = &adapter->hw;
8697 unsigned int p, num_pools;
8698 u32 vmdctl;
8699
8700 switch (mode) {
8701 case BRIDGE_MODE_VEPA:
8702 /* disable Tx loopback, rely on switch hairpin mode */
8703 IXGBE_WRITE_REG(&adapter->hw, IXGBE_PFDTXGSWC, 0);
8704
8705 /* must enable Rx switching replication to allow multicast
8706 * packet reception on all VFs, and to enable source address
8707 * pruning.
8708 */
8709 vmdctl = IXGBE_READ_REG(hw, IXGBE_VMD_CTL);
8710 vmdctl |= IXGBE_VT_CTL_REPLEN;
8711 IXGBE_WRITE_REG(hw, IXGBE_VMD_CTL, vmdctl);
8712
8713 /* enable Rx source address pruning. Note, this requires
8714 * replication to be enabled or else it does nothing.
8715 */
8716 num_pools = adapter->num_vfs + adapter->num_rx_pools;
8717 for (p = 0; p < num_pools; p++) {
8718 if (hw->mac.ops.set_source_address_pruning)
8719 hw->mac.ops.set_source_address_pruning(hw,
8720 true,
8721 p);
8722 }
8723 break;
8724 case BRIDGE_MODE_VEB:
8725 /* enable Tx loopback for internal VF/PF communication */
8726 IXGBE_WRITE_REG(&adapter->hw, IXGBE_PFDTXGSWC,
8727 IXGBE_PFDTXGSWC_VT_LBEN);
8728
8729 /* disable Rx switching replication unless we have SR-IOV
8730 * virtual functions
8731 */
8732 vmdctl = IXGBE_READ_REG(hw, IXGBE_VMD_CTL);
8733 if (!adapter->num_vfs)
8734 vmdctl &= ~IXGBE_VT_CTL_REPLEN;
8735 IXGBE_WRITE_REG(hw, IXGBE_VMD_CTL, vmdctl);
8736
8737 /* disable Rx source address pruning, since we don't expect to
8738 * be receiving external loopback of our transmitted frames.
8739 */
8740 num_pools = adapter->num_vfs + adapter->num_rx_pools;
8741 for (p = 0; p < num_pools; p++) {
8742 if (hw->mac.ops.set_source_address_pruning)
8743 hw->mac.ops.set_source_address_pruning(hw,
8744 false,
8745 p);
8746 }
8747 break;
8748 default:
8749 return -EINVAL;
8750 }
8751
8752 adapter->bridge_mode = mode;
8753
8754 e_info(drv, "enabling bridge mode: %s\n",
8755 mode == BRIDGE_MODE_VEPA ? "VEPA" : "VEB");
8756
8757 return 0;
8758 }
8759
8760 static int ixgbe_ndo_bridge_setlink(struct net_device *dev,
8761 struct nlmsghdr *nlh, u16 flags)
8762 {
8763 struct ixgbe_adapter *adapter = netdev_priv(dev);
8764 struct nlattr *attr, *br_spec;
8765 int rem;
8766
8767 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
8768 return -EOPNOTSUPP;
8769
8770 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
8771 if (!br_spec)
8772 return -EINVAL;
8773
8774 nla_for_each_nested(attr, br_spec, rem) {
8775 int status;
8776 __u16 mode;
8777
8778 if (nla_type(attr) != IFLA_BRIDGE_MODE)
8779 continue;
8780
8781 if (nla_len(attr) < sizeof(mode))
8782 return -EINVAL;
8783
8784 mode = nla_get_u16(attr);
8785 status = ixgbe_configure_bridge_mode(adapter, mode);
8786 if (status)
8787 return status;
8788
8789 break;
8790 }
8791
8792 return 0;
8793 }
8794
8795 static int ixgbe_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
8796 struct net_device *dev,
8797 u32 filter_mask, int nlflags)
8798 {
8799 struct ixgbe_adapter *adapter = netdev_priv(dev);
8800
8801 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
8802 return 0;
8803
8804 return ndo_dflt_bridge_getlink(skb, pid, seq, dev,
8805 adapter->bridge_mode, 0, 0, nlflags,
8806 filter_mask, NULL);
8807 }
8808
8809 static void *ixgbe_fwd_add(struct net_device *pdev, struct net_device *vdev)
8810 {
8811 struct ixgbe_fwd_adapter *fwd_adapter = NULL;
8812 struct ixgbe_adapter *adapter = netdev_priv(pdev);
8813 int used_pools = adapter->num_vfs + adapter->num_rx_pools;
8814 unsigned int limit;
8815 int pool, err;
8816
8817 /* Hardware has a limited number of available pools. Each VF, and the
8818 * PF require a pool. Check to ensure we don't attempt to use more
8819 * then the available number of pools.
8820 */
8821 if (used_pools >= IXGBE_MAX_VF_FUNCTIONS)
8822 return ERR_PTR(-EINVAL);
8823
8824 #ifdef CONFIG_RPS
8825 if (vdev->num_rx_queues != vdev->num_tx_queues) {
8826 netdev_info(pdev, "%s: Only supports a single queue count for TX and RX\n",
8827 vdev->name);
8828 return ERR_PTR(-EINVAL);
8829 }
8830 #endif
8831 /* Check for hardware restriction on number of rx/tx queues */
8832 if (vdev->num_tx_queues > IXGBE_MAX_L2A_QUEUES ||
8833 vdev->num_tx_queues == IXGBE_BAD_L2A_QUEUE) {
8834 netdev_info(pdev,
8835 "%s: Supports RX/TX Queue counts 1,2, and 4\n",
8836 pdev->name);
8837 return ERR_PTR(-EINVAL);
8838 }
8839
8840 if (((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
8841 adapter->num_rx_pools > IXGBE_MAX_DCBMACVLANS - 1) ||
8842 (adapter->num_rx_pools > IXGBE_MAX_MACVLANS))
8843 return ERR_PTR(-EBUSY);
8844
8845 fwd_adapter = kzalloc(sizeof(*fwd_adapter), GFP_KERNEL);
8846 if (!fwd_adapter)
8847 return ERR_PTR(-ENOMEM);
8848
8849 pool = find_first_zero_bit(&adapter->fwd_bitmask, 32);
8850 adapter->num_rx_pools++;
8851 set_bit(pool, &adapter->fwd_bitmask);
8852 limit = find_last_bit(&adapter->fwd_bitmask, 32);
8853
8854 /* Enable VMDq flag so device will be set in VM mode */
8855 adapter->flags |= IXGBE_FLAG_VMDQ_ENABLED | IXGBE_FLAG_SRIOV_ENABLED;
8856 adapter->ring_feature[RING_F_VMDQ].limit = limit + 1;
8857 adapter->ring_feature[RING_F_RSS].limit = vdev->num_tx_queues;
8858
8859 /* Force reinit of ring allocation with VMDQ enabled */
8860 err = ixgbe_setup_tc(pdev, netdev_get_num_tc(pdev));
8861 if (err)
8862 goto fwd_add_err;
8863 fwd_adapter->pool = pool;
8864 fwd_adapter->real_adapter = adapter;
8865 err = ixgbe_fwd_ring_up(vdev, fwd_adapter);
8866 if (err)
8867 goto fwd_add_err;
8868 netif_tx_start_all_queues(vdev);
8869 return fwd_adapter;
8870 fwd_add_err:
8871 /* unwind counter and free adapter struct */
8872 netdev_info(pdev,
8873 "%s: dfwd hardware acceleration failed\n", vdev->name);
8874 clear_bit(pool, &adapter->fwd_bitmask);
8875 adapter->num_rx_pools--;
8876 kfree(fwd_adapter);
8877 return ERR_PTR(err);
8878 }
8879
8880 static void ixgbe_fwd_del(struct net_device *pdev, void *priv)
8881 {
8882 struct ixgbe_fwd_adapter *fwd_adapter = priv;
8883 struct ixgbe_adapter *adapter = fwd_adapter->real_adapter;
8884 unsigned int limit;
8885
8886 clear_bit(fwd_adapter->pool, &adapter->fwd_bitmask);
8887 adapter->num_rx_pools--;
8888
8889 limit = find_last_bit(&adapter->fwd_bitmask, 32);
8890 adapter->ring_feature[RING_F_VMDQ].limit = limit + 1;
8891 ixgbe_fwd_ring_down(fwd_adapter->netdev, fwd_adapter);
8892 ixgbe_setup_tc(pdev, netdev_get_num_tc(pdev));
8893 netdev_dbg(pdev, "pool %i:%i queues %i:%i VSI bitmask %lx\n",
8894 fwd_adapter->pool, adapter->num_rx_pools,
8895 fwd_adapter->rx_base_queue,
8896 fwd_adapter->rx_base_queue + adapter->num_rx_queues_per_pool,
8897 adapter->fwd_bitmask);
8898 kfree(fwd_adapter);
8899 }
8900
8901 #define IXGBE_MAX_TUNNEL_HDR_LEN 80
8902 static netdev_features_t
8903 ixgbe_features_check(struct sk_buff *skb, struct net_device *dev,
8904 netdev_features_t features)
8905 {
8906 if (!skb->encapsulation)
8907 return features;
8908
8909 if (unlikely(skb_inner_mac_header(skb) - skb_transport_header(skb) >
8910 IXGBE_MAX_TUNNEL_HDR_LEN))
8911 return features & ~NETIF_F_CSUM_MASK;
8912
8913 return features;
8914 }
8915
8916 static const struct net_device_ops ixgbe_netdev_ops = {
8917 .ndo_open = ixgbe_open,
8918 .ndo_stop = ixgbe_close,
8919 .ndo_start_xmit = ixgbe_xmit_frame,
8920 .ndo_select_queue = ixgbe_select_queue,
8921 .ndo_set_rx_mode = ixgbe_set_rx_mode,
8922 .ndo_validate_addr = eth_validate_addr,
8923 .ndo_set_mac_address = ixgbe_set_mac,
8924 .ndo_change_mtu = ixgbe_change_mtu,
8925 .ndo_tx_timeout = ixgbe_tx_timeout,
8926 .ndo_set_tx_maxrate = ixgbe_tx_maxrate,
8927 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
8928 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
8929 .ndo_do_ioctl = ixgbe_ioctl,
8930 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
8931 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
8932 .ndo_set_vf_rate = ixgbe_ndo_set_vf_bw,
8933 .ndo_set_vf_spoofchk = ixgbe_ndo_set_vf_spoofchk,
8934 .ndo_set_vf_rss_query_en = ixgbe_ndo_set_vf_rss_query_en,
8935 .ndo_set_vf_trust = ixgbe_ndo_set_vf_trust,
8936 .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
8937 .ndo_get_stats64 = ixgbe_get_stats64,
8938 .ndo_setup_tc = __ixgbe_setup_tc,
8939 #ifdef CONFIG_NET_POLL_CONTROLLER
8940 .ndo_poll_controller = ixgbe_netpoll,
8941 #endif
8942 #ifdef CONFIG_NET_RX_BUSY_POLL
8943 .ndo_busy_poll = ixgbe_low_latency_recv,
8944 #endif
8945 #ifdef IXGBE_FCOE
8946 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
8947 .ndo_fcoe_ddp_target = ixgbe_fcoe_ddp_target,
8948 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
8949 .ndo_fcoe_enable = ixgbe_fcoe_enable,
8950 .ndo_fcoe_disable = ixgbe_fcoe_disable,
8951 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
8952 .ndo_fcoe_get_hbainfo = ixgbe_fcoe_get_hbainfo,
8953 #endif /* IXGBE_FCOE */
8954 .ndo_set_features = ixgbe_set_features,
8955 .ndo_fix_features = ixgbe_fix_features,
8956 .ndo_fdb_add = ixgbe_ndo_fdb_add,
8957 .ndo_bridge_setlink = ixgbe_ndo_bridge_setlink,
8958 .ndo_bridge_getlink = ixgbe_ndo_bridge_getlink,
8959 .ndo_dfwd_add_station = ixgbe_fwd_add,
8960 .ndo_dfwd_del_station = ixgbe_fwd_del,
8961 #ifdef CONFIG_IXGBE_VXLAN
8962 .ndo_add_vxlan_port = ixgbe_add_vxlan_port,
8963 .ndo_del_vxlan_port = ixgbe_del_vxlan_port,
8964 #endif /* CONFIG_IXGBE_VXLAN */
8965 .ndo_features_check = ixgbe_features_check,
8966 };
8967
8968 /**
8969 * ixgbe_enumerate_functions - Get the number of ports this device has
8970 * @adapter: adapter structure
8971 *
8972 * This function enumerates the phsyical functions co-located on a single slot,
8973 * in order to determine how many ports a device has. This is most useful in
8974 * determining the required GT/s of PCIe bandwidth necessary for optimal
8975 * performance.
8976 **/
8977 static inline int ixgbe_enumerate_functions(struct ixgbe_adapter *adapter)
8978 {
8979 struct pci_dev *entry, *pdev = adapter->pdev;
8980 int physfns = 0;
8981
8982 /* Some cards can not use the generic count PCIe functions method,
8983 * because they are behind a parent switch, so we hardcode these with
8984 * the correct number of functions.
8985 */
8986 if (ixgbe_pcie_from_parent(&adapter->hw))
8987 physfns = 4;
8988
8989 list_for_each_entry(entry, &adapter->pdev->bus->devices, bus_list) {
8990 /* don't count virtual functions */
8991 if (entry->is_virtfn)
8992 continue;
8993
8994 /* When the devices on the bus don't all match our device ID,
8995 * we can't reliably determine the correct number of
8996 * functions. This can occur if a function has been direct
8997 * attached to a virtual machine using VT-d, for example. In
8998 * this case, simply return -1 to indicate this.
8999 */
9000 if ((entry->vendor != pdev->vendor) ||
9001 (entry->device != pdev->device))
9002 return -1;
9003
9004 physfns++;
9005 }
9006
9007 return physfns;
9008 }
9009
9010 /**
9011 * ixgbe_wol_supported - Check whether device supports WoL
9012 * @hw: hw specific details
9013 * @device_id: the device ID
9014 * @subdev_id: the subsystem device ID
9015 *
9016 * This function is used by probe and ethtool to determine
9017 * which devices have WoL support
9018 *
9019 **/
9020 int ixgbe_wol_supported(struct ixgbe_adapter *adapter, u16 device_id,
9021 u16 subdevice_id)
9022 {
9023 struct ixgbe_hw *hw = &adapter->hw;
9024 u16 wol_cap = adapter->eeprom_cap & IXGBE_DEVICE_CAPS_WOL_MASK;
9025 int is_wol_supported = 0;
9026
9027 switch (device_id) {
9028 case IXGBE_DEV_ID_82599_SFP:
9029 /* Only these subdevices could supports WOL */
9030 switch (subdevice_id) {
9031 case IXGBE_SUBDEV_ID_82599_SFP_WOL0:
9032 case IXGBE_SUBDEV_ID_82599_560FLR:
9033 /* only support first port */
9034 if (hw->bus.func != 0)
9035 break;
9036 case IXGBE_SUBDEV_ID_82599_SP_560FLR:
9037 case IXGBE_SUBDEV_ID_82599_SFP:
9038 case IXGBE_SUBDEV_ID_82599_RNDC:
9039 case IXGBE_SUBDEV_ID_82599_ECNA_DP:
9040 case IXGBE_SUBDEV_ID_82599_LOM_SFP:
9041 is_wol_supported = 1;
9042 break;
9043 }
9044 break;
9045 case IXGBE_DEV_ID_82599EN_SFP:
9046 /* Only this subdevice supports WOL */
9047 switch (subdevice_id) {
9048 case IXGBE_SUBDEV_ID_82599EN_SFP_OCP1:
9049 is_wol_supported = 1;
9050 break;
9051 }
9052 break;
9053 case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
9054 /* All except this subdevice support WOL */
9055 if (subdevice_id != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ)
9056 is_wol_supported = 1;
9057 break;
9058 case IXGBE_DEV_ID_82599_KX4:
9059 is_wol_supported = 1;
9060 break;
9061 case IXGBE_DEV_ID_X540T:
9062 case IXGBE_DEV_ID_X540T1:
9063 case IXGBE_DEV_ID_X550T:
9064 case IXGBE_DEV_ID_X550T1:
9065 case IXGBE_DEV_ID_X550EM_X_KX4:
9066 case IXGBE_DEV_ID_X550EM_X_KR:
9067 case IXGBE_DEV_ID_X550EM_X_10G_T:
9068 /* check eeprom to see if enabled wol */
9069 if ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0_1) ||
9070 ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0) &&
9071 (hw->bus.func == 0))) {
9072 is_wol_supported = 1;
9073 }
9074 break;
9075 }
9076
9077 return is_wol_supported;
9078 }
9079
9080 /**
9081 * ixgbe_probe - Device Initialization Routine
9082 * @pdev: PCI device information struct
9083 * @ent: entry in ixgbe_pci_tbl
9084 *
9085 * Returns 0 on success, negative on failure
9086 *
9087 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
9088 * The OS initialization, configuring of the adapter private structure,
9089 * and a hardware reset occur.
9090 **/
9091 static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
9092 {
9093 struct net_device *netdev;
9094 struct ixgbe_adapter *adapter = NULL;
9095 struct ixgbe_hw *hw;
9096 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
9097 int i, err, pci_using_dac, expected_gts;
9098 unsigned int indices = MAX_TX_QUEUES;
9099 u8 part_str[IXGBE_PBANUM_LENGTH];
9100 bool disable_dev = false;
9101 #ifdef IXGBE_FCOE
9102 u16 device_caps;
9103 #endif
9104 u32 eec;
9105
9106 /* Catch broken hardware that put the wrong VF device ID in
9107 * the PCIe SR-IOV capability.
9108 */
9109 if (pdev->is_virtfn) {
9110 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
9111 pci_name(pdev), pdev->vendor, pdev->device);
9112 return -EINVAL;
9113 }
9114
9115 err = pci_enable_device_mem(pdev);
9116 if (err)
9117 return err;
9118
9119 if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
9120 pci_using_dac = 1;
9121 } else {
9122 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
9123 if (err) {
9124 dev_err(&pdev->dev,
9125 "No usable DMA configuration, aborting\n");
9126 goto err_dma;
9127 }
9128 pci_using_dac = 0;
9129 }
9130
9131 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
9132 IORESOURCE_MEM), ixgbe_driver_name);
9133 if (err) {
9134 dev_err(&pdev->dev,
9135 "pci_request_selected_regions failed 0x%x\n", err);
9136 goto err_pci_reg;
9137 }
9138
9139 pci_enable_pcie_error_reporting(pdev);
9140
9141 pci_set_master(pdev);
9142 pci_save_state(pdev);
9143
9144 if (ii->mac == ixgbe_mac_82598EB) {
9145 #ifdef CONFIG_IXGBE_DCB
9146 /* 8 TC w/ 4 queues per TC */
9147 indices = 4 * MAX_TRAFFIC_CLASS;
9148 #else
9149 indices = IXGBE_MAX_RSS_INDICES;
9150 #endif
9151 }
9152
9153 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
9154 if (!netdev) {
9155 err = -ENOMEM;
9156 goto err_alloc_etherdev;
9157 }
9158
9159 SET_NETDEV_DEV(netdev, &pdev->dev);
9160
9161 adapter = netdev_priv(netdev);
9162
9163 adapter->netdev = netdev;
9164 adapter->pdev = pdev;
9165 hw = &adapter->hw;
9166 hw->back = adapter;
9167 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
9168
9169 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
9170 pci_resource_len(pdev, 0));
9171 adapter->io_addr = hw->hw_addr;
9172 if (!hw->hw_addr) {
9173 err = -EIO;
9174 goto err_ioremap;
9175 }
9176
9177 netdev->netdev_ops = &ixgbe_netdev_ops;
9178 ixgbe_set_ethtool_ops(netdev);
9179 netdev->watchdog_timeo = 5 * HZ;
9180 strlcpy(netdev->name, pci_name(pdev), sizeof(netdev->name));
9181
9182 /* Setup hw api */
9183 hw->mac.ops = *ii->mac_ops;
9184 hw->mac.type = ii->mac;
9185 hw->mvals = ii->mvals;
9186
9187 /* EEPROM */
9188 hw->eeprom.ops = *ii->eeprom_ops;
9189 eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
9190 if (ixgbe_removed(hw->hw_addr)) {
9191 err = -EIO;
9192 goto err_ioremap;
9193 }
9194 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
9195 if (!(eec & (1 << 8)))
9196 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
9197
9198 /* PHY */
9199 hw->phy.ops = *ii->phy_ops;
9200 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
9201 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
9202 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
9203 hw->phy.mdio.mmds = 0;
9204 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
9205 hw->phy.mdio.dev = netdev;
9206 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
9207 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
9208
9209 ii->get_invariants(hw);
9210
9211 /* setup the private structure */
9212 err = ixgbe_sw_init(adapter);
9213 if (err)
9214 goto err_sw_init;
9215
9216 /* Make sure the SWFW semaphore is in a valid state */
9217 if (hw->mac.ops.init_swfw_sync)
9218 hw->mac.ops.init_swfw_sync(hw);
9219
9220 /* Make it possible the adapter to be woken up via WOL */
9221 switch (adapter->hw.mac.type) {
9222 case ixgbe_mac_82599EB:
9223 case ixgbe_mac_X540:
9224 case ixgbe_mac_X550:
9225 case ixgbe_mac_X550EM_x:
9226 case ixgbe_mac_x550em_a:
9227 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
9228 break;
9229 default:
9230 break;
9231 }
9232
9233 /*
9234 * If there is a fan on this device and it has failed log the
9235 * failure.
9236 */
9237 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
9238 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
9239 if (esdp & IXGBE_ESDP_SDP1)
9240 e_crit(probe, "Fan has stopped, replace the adapter\n");
9241 }
9242
9243 if (allow_unsupported_sfp)
9244 hw->allow_unsupported_sfp = allow_unsupported_sfp;
9245
9246 /* reset_hw fills in the perm_addr as well */
9247 hw->phy.reset_if_overtemp = true;
9248 err = hw->mac.ops.reset_hw(hw);
9249 hw->phy.reset_if_overtemp = false;
9250 if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
9251 err = 0;
9252 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
9253 e_dev_err("failed to load because an unsupported SFP+ or QSFP module type was detected.\n");
9254 e_dev_err("Reload the driver after installing a supported module.\n");
9255 goto err_sw_init;
9256 } else if (err) {
9257 e_dev_err("HW Init failed: %d\n", err);
9258 goto err_sw_init;
9259 }
9260
9261 #ifdef CONFIG_PCI_IOV
9262 /* SR-IOV not supported on the 82598 */
9263 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
9264 goto skip_sriov;
9265 /* Mailbox */
9266 ixgbe_init_mbx_params_pf(hw);
9267 hw->mbx.ops = ii->mbx_ops;
9268 pci_sriov_set_totalvfs(pdev, IXGBE_MAX_VFS_DRV_LIMIT);
9269 ixgbe_enable_sriov(adapter);
9270 skip_sriov:
9271
9272 #endif
9273 netdev->features = NETIF_F_SG |
9274 NETIF_F_TSO |
9275 NETIF_F_TSO6 |
9276 NETIF_F_RXHASH |
9277 NETIF_F_RXCSUM |
9278 NETIF_F_HW_CSUM |
9279 NETIF_F_HW_VLAN_CTAG_TX |
9280 NETIF_F_HW_VLAN_CTAG_RX |
9281 NETIF_F_HW_VLAN_CTAG_FILTER;
9282
9283 if (hw->mac.type >= ixgbe_mac_82599EB)
9284 netdev->features |= NETIF_F_SCTP_CRC;
9285
9286 /* copy netdev features into list of user selectable features */
9287 netdev->hw_features |= netdev->features;
9288 netdev->hw_features |= NETIF_F_RXALL |
9289 NETIF_F_HW_L2FW_DOFFLOAD;
9290
9291 if (hw->mac.type >= ixgbe_mac_82599EB)
9292 netdev->hw_features |= NETIF_F_NTUPLE |
9293 NETIF_F_HW_TC;
9294
9295 netdev->vlan_features |= NETIF_F_SG |
9296 NETIF_F_TSO |
9297 NETIF_F_TSO6 |
9298 NETIF_F_HW_CSUM |
9299 NETIF_F_SCTP_CRC;
9300
9301 netdev->mpls_features |= NETIF_F_HW_CSUM;
9302 netdev->hw_enc_features |= NETIF_F_HW_CSUM;
9303
9304 netdev->priv_flags |= IFF_UNICAST_FLT;
9305 netdev->priv_flags |= IFF_SUPP_NOFCS;
9306
9307 #ifdef CONFIG_IXGBE_DCB
9308 netdev->dcbnl_ops = &dcbnl_ops;
9309 #endif
9310
9311 #ifdef IXGBE_FCOE
9312 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
9313 unsigned int fcoe_l;
9314
9315 if (hw->mac.ops.get_device_caps) {
9316 hw->mac.ops.get_device_caps(hw, &device_caps);
9317 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
9318 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
9319 }
9320
9321
9322 fcoe_l = min_t(int, IXGBE_FCRETA_SIZE, num_online_cpus());
9323 adapter->ring_feature[RING_F_FCOE].limit = fcoe_l;
9324
9325 netdev->features |= NETIF_F_FSO |
9326 NETIF_F_FCOE_CRC;
9327
9328 netdev->vlan_features |= NETIF_F_FSO |
9329 NETIF_F_FCOE_CRC |
9330 NETIF_F_FCOE_MTU;
9331 }
9332 #endif /* IXGBE_FCOE */
9333 if (pci_using_dac) {
9334 netdev->features |= NETIF_F_HIGHDMA;
9335 netdev->vlan_features |= NETIF_F_HIGHDMA;
9336 }
9337
9338 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
9339 netdev->hw_features |= NETIF_F_LRO;
9340 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
9341 netdev->features |= NETIF_F_LRO;
9342
9343 /* make sure the EEPROM is good */
9344 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
9345 e_dev_err("The EEPROM Checksum Is Not Valid\n");
9346 err = -EIO;
9347 goto err_sw_init;
9348 }
9349
9350 eth_platform_get_mac_address(&adapter->pdev->dev,
9351 adapter->hw.mac.perm_addr);
9352
9353 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
9354
9355 if (!is_valid_ether_addr(netdev->dev_addr)) {
9356 e_dev_err("invalid MAC address\n");
9357 err = -EIO;
9358 goto err_sw_init;
9359 }
9360
9361 /* Set hw->mac.addr to permanent MAC address */
9362 ether_addr_copy(hw->mac.addr, hw->mac.perm_addr);
9363 ixgbe_mac_set_default_filter(adapter);
9364
9365 setup_timer(&adapter->service_timer, &ixgbe_service_timer,
9366 (unsigned long) adapter);
9367
9368 if (ixgbe_removed(hw->hw_addr)) {
9369 err = -EIO;
9370 goto err_sw_init;
9371 }
9372 INIT_WORK(&adapter->service_task, ixgbe_service_task);
9373 set_bit(__IXGBE_SERVICE_INITED, &adapter->state);
9374 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
9375
9376 err = ixgbe_init_interrupt_scheme(adapter);
9377 if (err)
9378 goto err_sw_init;
9379
9380 /* WOL not supported for all devices */
9381 adapter->wol = 0;
9382 hw->eeprom.ops.read(hw, 0x2c, &adapter->eeprom_cap);
9383 hw->wol_enabled = ixgbe_wol_supported(adapter, pdev->device,
9384 pdev->subsystem_device);
9385 if (hw->wol_enabled)
9386 adapter->wol = IXGBE_WUFC_MAG;
9387
9388 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
9389
9390 /* save off EEPROM version number */
9391 hw->eeprom.ops.read(hw, 0x2e, &adapter->eeprom_verh);
9392 hw->eeprom.ops.read(hw, 0x2d, &adapter->eeprom_verl);
9393
9394 /* pick up the PCI bus settings for reporting later */
9395 if (ixgbe_pcie_from_parent(hw))
9396 ixgbe_get_parent_bus_info(adapter);
9397 else
9398 hw->mac.ops.get_bus_info(hw);
9399
9400 /* calculate the expected PCIe bandwidth required for optimal
9401 * performance. Note that some older parts will never have enough
9402 * bandwidth due to being older generation PCIe parts. We clamp these
9403 * parts to ensure no warning is displayed if it can't be fixed.
9404 */
9405 switch (hw->mac.type) {
9406 case ixgbe_mac_82598EB:
9407 expected_gts = min(ixgbe_enumerate_functions(adapter) * 10, 16);
9408 break;
9409 default:
9410 expected_gts = ixgbe_enumerate_functions(adapter) * 10;
9411 break;
9412 }
9413
9414 /* don't check link if we failed to enumerate functions */
9415 if (expected_gts > 0)
9416 ixgbe_check_minimum_link(adapter, expected_gts);
9417
9418 err = ixgbe_read_pba_string_generic(hw, part_str, sizeof(part_str));
9419 if (err)
9420 strlcpy(part_str, "Unknown", sizeof(part_str));
9421 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
9422 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, PBA No: %s\n",
9423 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
9424 part_str);
9425 else
9426 e_dev_info("MAC: %d, PHY: %d, PBA No: %s\n",
9427 hw->mac.type, hw->phy.type, part_str);
9428
9429 e_dev_info("%pM\n", netdev->dev_addr);
9430
9431 /* reset the hardware with the new settings */
9432 err = hw->mac.ops.start_hw(hw);
9433 if (err == IXGBE_ERR_EEPROM_VERSION) {
9434 /* We are running on a pre-production device, log a warning */
9435 e_dev_warn("This device is a pre-production adapter/LOM. "
9436 "Please be aware there may be issues associated "
9437 "with your hardware. If you are experiencing "
9438 "problems please contact your Intel or hardware "
9439 "representative who provided you with this "
9440 "hardware.\n");
9441 }
9442 strcpy(netdev->name, "eth%d");
9443 err = register_netdev(netdev);
9444 if (err)
9445 goto err_register;
9446
9447 pci_set_drvdata(pdev, adapter);
9448
9449 /* power down the optics for 82599 SFP+ fiber */
9450 if (hw->mac.ops.disable_tx_laser)
9451 hw->mac.ops.disable_tx_laser(hw);
9452
9453 /* carrier off reporting is important to ethtool even BEFORE open */
9454 netif_carrier_off(netdev);
9455
9456 #ifdef CONFIG_IXGBE_DCA
9457 if (dca_add_requester(&pdev->dev) == 0) {
9458 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
9459 ixgbe_setup_dca(adapter);
9460 }
9461 #endif
9462 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
9463 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
9464 for (i = 0; i < adapter->num_vfs; i++)
9465 ixgbe_vf_configuration(pdev, (i | 0x10000000));
9466 }
9467
9468 /* firmware requires driver version to be 0xFFFFFFFF
9469 * since os does not support feature
9470 */
9471 if (hw->mac.ops.set_fw_drv_ver)
9472 hw->mac.ops.set_fw_drv_ver(hw, 0xFF, 0xFF, 0xFF,
9473 0xFF);
9474
9475 /* add san mac addr to netdev */
9476 ixgbe_add_sanmac_netdev(netdev);
9477
9478 e_dev_info("%s\n", ixgbe_default_device_descr);
9479
9480 #ifdef CONFIG_IXGBE_HWMON
9481 if (ixgbe_sysfs_init(adapter))
9482 e_err(probe, "failed to allocate sysfs resources\n");
9483 #endif /* CONFIG_IXGBE_HWMON */
9484
9485 ixgbe_dbg_adapter_init(adapter);
9486
9487 /* setup link for SFP devices with MNG FW, else wait for IXGBE_UP */
9488 if (ixgbe_mng_enabled(hw) && ixgbe_is_sfp(hw) && hw->mac.ops.setup_link)
9489 hw->mac.ops.setup_link(hw,
9490 IXGBE_LINK_SPEED_10GB_FULL | IXGBE_LINK_SPEED_1GB_FULL,
9491 true);
9492
9493 return 0;
9494
9495 err_register:
9496 ixgbe_release_hw_control(adapter);
9497 ixgbe_clear_interrupt_scheme(adapter);
9498 err_sw_init:
9499 ixgbe_disable_sriov(adapter);
9500 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
9501 iounmap(adapter->io_addr);
9502 kfree(adapter->mac_table);
9503 err_ioremap:
9504 disable_dev = !test_and_set_bit(__IXGBE_DISABLED, &adapter->state);
9505 free_netdev(netdev);
9506 err_alloc_etherdev:
9507 pci_release_selected_regions(pdev,
9508 pci_select_bars(pdev, IORESOURCE_MEM));
9509 err_pci_reg:
9510 err_dma:
9511 if (!adapter || disable_dev)
9512 pci_disable_device(pdev);
9513 return err;
9514 }
9515
9516 /**
9517 * ixgbe_remove - Device Removal Routine
9518 * @pdev: PCI device information struct
9519 *
9520 * ixgbe_remove is called by the PCI subsystem to alert the driver
9521 * that it should release a PCI device. The could be caused by a
9522 * Hot-Plug event, or because the driver is going to be removed from
9523 * memory.
9524 **/
9525 static void ixgbe_remove(struct pci_dev *pdev)
9526 {
9527 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
9528 struct net_device *netdev;
9529 bool disable_dev;
9530
9531 /* if !adapter then we already cleaned up in probe */
9532 if (!adapter)
9533 return;
9534
9535 netdev = adapter->netdev;
9536 ixgbe_dbg_adapter_exit(adapter);
9537
9538 set_bit(__IXGBE_REMOVING, &adapter->state);
9539 cancel_work_sync(&adapter->service_task);
9540
9541
9542 #ifdef CONFIG_IXGBE_DCA
9543 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
9544 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
9545 dca_remove_requester(&pdev->dev);
9546 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
9547 IXGBE_DCA_CTRL_DCA_DISABLE);
9548 }
9549
9550 #endif
9551 #ifdef CONFIG_IXGBE_HWMON
9552 ixgbe_sysfs_exit(adapter);
9553 #endif /* CONFIG_IXGBE_HWMON */
9554
9555 /* remove the added san mac */
9556 ixgbe_del_sanmac_netdev(netdev);
9557
9558 #ifdef CONFIG_PCI_IOV
9559 ixgbe_disable_sriov(adapter);
9560 #endif
9561 if (netdev->reg_state == NETREG_REGISTERED)
9562 unregister_netdev(netdev);
9563
9564 ixgbe_clear_interrupt_scheme(adapter);
9565
9566 ixgbe_release_hw_control(adapter);
9567
9568 #ifdef CONFIG_DCB
9569 kfree(adapter->ixgbe_ieee_pfc);
9570 kfree(adapter->ixgbe_ieee_ets);
9571
9572 #endif
9573 iounmap(adapter->io_addr);
9574 pci_release_selected_regions(pdev, pci_select_bars(pdev,
9575 IORESOURCE_MEM));
9576
9577 e_dev_info("complete\n");
9578
9579 kfree(adapter->mac_table);
9580 disable_dev = !test_and_set_bit(__IXGBE_DISABLED, &adapter->state);
9581 free_netdev(netdev);
9582
9583 pci_disable_pcie_error_reporting(pdev);
9584
9585 if (disable_dev)
9586 pci_disable_device(pdev);
9587 }
9588
9589 /**
9590 * ixgbe_io_error_detected - called when PCI error is detected
9591 * @pdev: Pointer to PCI device
9592 * @state: The current pci connection state
9593 *
9594 * This function is called after a PCI bus error affecting
9595 * this device has been detected.
9596 */
9597 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
9598 pci_channel_state_t state)
9599 {
9600 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
9601 struct net_device *netdev = adapter->netdev;
9602
9603 #ifdef CONFIG_PCI_IOV
9604 struct ixgbe_hw *hw = &adapter->hw;
9605 struct pci_dev *bdev, *vfdev;
9606 u32 dw0, dw1, dw2, dw3;
9607 int vf, pos;
9608 u16 req_id, pf_func;
9609
9610 if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
9611 adapter->num_vfs == 0)
9612 goto skip_bad_vf_detection;
9613
9614 bdev = pdev->bus->self;
9615 while (bdev && (pci_pcie_type(bdev) != PCI_EXP_TYPE_ROOT_PORT))
9616 bdev = bdev->bus->self;
9617
9618 if (!bdev)
9619 goto skip_bad_vf_detection;
9620
9621 pos = pci_find_ext_capability(bdev, PCI_EXT_CAP_ID_ERR);
9622 if (!pos)
9623 goto skip_bad_vf_detection;
9624
9625 dw0 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG);
9626 dw1 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 4);
9627 dw2 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 8);
9628 dw3 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 12);
9629 if (ixgbe_removed(hw->hw_addr))
9630 goto skip_bad_vf_detection;
9631
9632 req_id = dw1 >> 16;
9633 /* On the 82599 if bit 7 of the requestor ID is set then it's a VF */
9634 if (!(req_id & 0x0080))
9635 goto skip_bad_vf_detection;
9636
9637 pf_func = req_id & 0x01;
9638 if ((pf_func & 1) == (pdev->devfn & 1)) {
9639 unsigned int device_id;
9640
9641 vf = (req_id & 0x7F) >> 1;
9642 e_dev_err("VF %d has caused a PCIe error\n", vf);
9643 e_dev_err("TLP: dw0: %8.8x\tdw1: %8.8x\tdw2: "
9644 "%8.8x\tdw3: %8.8x\n",
9645 dw0, dw1, dw2, dw3);
9646 switch (adapter->hw.mac.type) {
9647 case ixgbe_mac_82599EB:
9648 device_id = IXGBE_82599_VF_DEVICE_ID;
9649 break;
9650 case ixgbe_mac_X540:
9651 device_id = IXGBE_X540_VF_DEVICE_ID;
9652 break;
9653 case ixgbe_mac_X550:
9654 device_id = IXGBE_DEV_ID_X550_VF;
9655 break;
9656 case ixgbe_mac_X550EM_x:
9657 device_id = IXGBE_DEV_ID_X550EM_X_VF;
9658 break;
9659 case ixgbe_mac_x550em_a:
9660 device_id = IXGBE_DEV_ID_X550EM_A_VF;
9661 break;
9662 default:
9663 device_id = 0;
9664 break;
9665 }
9666
9667 /* Find the pci device of the offending VF */
9668 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL, device_id, NULL);
9669 while (vfdev) {
9670 if (vfdev->devfn == (req_id & 0xFF))
9671 break;
9672 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL,
9673 device_id, vfdev);
9674 }
9675 /*
9676 * There's a slim chance the VF could have been hot plugged,
9677 * so if it is no longer present we don't need to issue the
9678 * VFLR. Just clean up the AER in that case.
9679 */
9680 if (vfdev) {
9681 ixgbe_issue_vf_flr(adapter, vfdev);
9682 /* Free device reference count */
9683 pci_dev_put(vfdev);
9684 }
9685
9686 pci_cleanup_aer_uncorrect_error_status(pdev);
9687 }
9688
9689 /*
9690 * Even though the error may have occurred on the other port
9691 * we still need to increment the vf error reference count for
9692 * both ports because the I/O resume function will be called
9693 * for both of them.
9694 */
9695 adapter->vferr_refcount++;
9696
9697 return PCI_ERS_RESULT_RECOVERED;
9698
9699 skip_bad_vf_detection:
9700 #endif /* CONFIG_PCI_IOV */
9701 if (!test_bit(__IXGBE_SERVICE_INITED, &adapter->state))
9702 return PCI_ERS_RESULT_DISCONNECT;
9703
9704 rtnl_lock();
9705 netif_device_detach(netdev);
9706
9707 if (state == pci_channel_io_perm_failure) {
9708 rtnl_unlock();
9709 return PCI_ERS_RESULT_DISCONNECT;
9710 }
9711
9712 if (netif_running(netdev))
9713 ixgbe_down(adapter);
9714
9715 if (!test_and_set_bit(__IXGBE_DISABLED, &adapter->state))
9716 pci_disable_device(pdev);
9717 rtnl_unlock();
9718
9719 /* Request a slot reset. */
9720 return PCI_ERS_RESULT_NEED_RESET;
9721 }
9722
9723 /**
9724 * ixgbe_io_slot_reset - called after the pci bus has been reset.
9725 * @pdev: Pointer to PCI device
9726 *
9727 * Restart the card from scratch, as if from a cold-boot.
9728 */
9729 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
9730 {
9731 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
9732 pci_ers_result_t result;
9733 int err;
9734
9735 if (pci_enable_device_mem(pdev)) {
9736 e_err(probe, "Cannot re-enable PCI device after reset.\n");
9737 result = PCI_ERS_RESULT_DISCONNECT;
9738 } else {
9739 smp_mb__before_atomic();
9740 clear_bit(__IXGBE_DISABLED, &adapter->state);
9741 adapter->hw.hw_addr = adapter->io_addr;
9742 pci_set_master(pdev);
9743 pci_restore_state(pdev);
9744 pci_save_state(pdev);
9745
9746 pci_wake_from_d3(pdev, false);
9747
9748 ixgbe_reset(adapter);
9749 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
9750 result = PCI_ERS_RESULT_RECOVERED;
9751 }
9752
9753 err = pci_cleanup_aer_uncorrect_error_status(pdev);
9754 if (err) {
9755 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
9756 "failed 0x%0x\n", err);
9757 /* non-fatal, continue */
9758 }
9759
9760 return result;
9761 }
9762
9763 /**
9764 * ixgbe_io_resume - called when traffic can start flowing again.
9765 * @pdev: Pointer to PCI device
9766 *
9767 * This callback is called when the error recovery driver tells us that
9768 * its OK to resume normal operation.
9769 */
9770 static void ixgbe_io_resume(struct pci_dev *pdev)
9771 {
9772 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
9773 struct net_device *netdev = adapter->netdev;
9774
9775 #ifdef CONFIG_PCI_IOV
9776 if (adapter->vferr_refcount) {
9777 e_info(drv, "Resuming after VF err\n");
9778 adapter->vferr_refcount--;
9779 return;
9780 }
9781
9782 #endif
9783 if (netif_running(netdev))
9784 ixgbe_up(adapter);
9785
9786 netif_device_attach(netdev);
9787 }
9788
9789 static const struct pci_error_handlers ixgbe_err_handler = {
9790 .error_detected = ixgbe_io_error_detected,
9791 .slot_reset = ixgbe_io_slot_reset,
9792 .resume = ixgbe_io_resume,
9793 };
9794
9795 static struct pci_driver ixgbe_driver = {
9796 .name = ixgbe_driver_name,
9797 .id_table = ixgbe_pci_tbl,
9798 .probe = ixgbe_probe,
9799 .remove = ixgbe_remove,
9800 #ifdef CONFIG_PM
9801 .suspend = ixgbe_suspend,
9802 .resume = ixgbe_resume,
9803 #endif
9804 .shutdown = ixgbe_shutdown,
9805 .sriov_configure = ixgbe_pci_sriov_configure,
9806 .err_handler = &ixgbe_err_handler
9807 };
9808
9809 /**
9810 * ixgbe_init_module - Driver Registration Routine
9811 *
9812 * ixgbe_init_module is the first routine called when the driver is
9813 * loaded. All it does is register with the PCI subsystem.
9814 **/
9815 static int __init ixgbe_init_module(void)
9816 {
9817 int ret;
9818 pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
9819 pr_info("%s\n", ixgbe_copyright);
9820
9821 ixgbe_wq = create_singlethread_workqueue(ixgbe_driver_name);
9822 if (!ixgbe_wq) {
9823 pr_err("%s: Failed to create workqueue\n", ixgbe_driver_name);
9824 return -ENOMEM;
9825 }
9826
9827 ixgbe_dbg_init();
9828
9829 ret = pci_register_driver(&ixgbe_driver);
9830 if (ret) {
9831 ixgbe_dbg_exit();
9832 return ret;
9833 }
9834
9835 #ifdef CONFIG_IXGBE_DCA
9836 dca_register_notify(&dca_notifier);
9837 #endif
9838
9839 return 0;
9840 }
9841
9842 module_init(ixgbe_init_module);
9843
9844 /**
9845 * ixgbe_exit_module - Driver Exit Cleanup Routine
9846 *
9847 * ixgbe_exit_module is called just before the driver is removed
9848 * from memory.
9849 **/
9850 static void __exit ixgbe_exit_module(void)
9851 {
9852 #ifdef CONFIG_IXGBE_DCA
9853 dca_unregister_notify(&dca_notifier);
9854 #endif
9855 pci_unregister_driver(&ixgbe_driver);
9856
9857 ixgbe_dbg_exit();
9858 if (ixgbe_wq) {
9859 destroy_workqueue(ixgbe_wq);
9860 ixgbe_wq = NULL;
9861 }
9862 }
9863
9864 #ifdef CONFIG_IXGBE_DCA
9865 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
9866 void *p)
9867 {
9868 int ret_val;
9869
9870 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
9871 __ixgbe_notify_dca);
9872
9873 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
9874 }
9875
9876 #endif /* CONFIG_IXGBE_DCA */
9877
9878 module_exit(ixgbe_exit_module);
9879
9880 /* ixgbe_main.c */
Linux kernel - Deliverables
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