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Merge tag 'xtensa-next-20160320' of git://github.com/czankel/xtensa-linux
[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 - 2015 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 #ifdef CONFIG_OF
58 #include <linux/of_net.h>
59 #endif
60
61 #ifdef CONFIG_SPARC
62 #include <asm/idprom.h>
63 #include <asm/prom.h>
64 #endif
65
66 #include "ixgbe.h"
67 #include "ixgbe_common.h"
68 #include "ixgbe_dcb_82599.h"
69 #include "ixgbe_sriov.h"
70 #include "ixgbe_model.h"
71
72 char ixgbe_driver_name[] = "ixgbe";
73 static const char ixgbe_driver_string[] =
74 "Intel(R) 10 Gigabit PCI Express Network Driver";
75 #ifdef IXGBE_FCOE
76 char ixgbe_default_device_descr[] =
77 "Intel(R) 10 Gigabit Network Connection";
78 #else
79 static char ixgbe_default_device_descr[] =
80 "Intel(R) 10 Gigabit Network Connection";
81 #endif
82 #define DRV_VERSION "4.2.1-k"
83 const char ixgbe_driver_version[] = DRV_VERSION;
84 static const char ixgbe_copyright[] =
85 "Copyright (c) 1999-2015 Intel Corporation.";
86
87 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";
88
89 static const struct ixgbe_info *ixgbe_info_tbl[] = {
90 [board_82598] = &ixgbe_82598_info,
91 [board_82599] = &ixgbe_82599_info,
92 [board_X540] = &ixgbe_X540_info,
93 [board_X550] = &ixgbe_X550_info,
94 [board_X550EM_x] = &ixgbe_X550EM_x_info,
95 };
96
97 /* ixgbe_pci_tbl - PCI Device ID Table
98 *
99 * Wildcard entries (PCI_ANY_ID) should come last
100 * Last entry must be all 0s
101 *
102 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
103 * Class, Class Mask, private data (not used) }
104 */
105 static const struct pci_device_id ixgbe_pci_tbl[] = {
106 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598), board_82598 },
107 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT), board_82598 },
108 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT), board_82598 },
109 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT), board_82598 },
110 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2), board_82598 },
111 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4), board_82598 },
112 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT), board_82598 },
113 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT), board_82598 },
114 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM), board_82598 },
115 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR), board_82598 },
116 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM), board_82598 },
117 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX), board_82598 },
118 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4), board_82599 },
119 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM), board_82599 },
120 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR), board_82599 },
121 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP), board_82599 },
122 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM), board_82599 },
123 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ), board_82599 },
124 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4), board_82599 },
125 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_BACKPLANE_FCOE), board_82599 },
126 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_FCOE), board_82599 },
127 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM), board_82599 },
128 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE), board_82599 },
129 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T), board_X540 },
130 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF2), board_82599 },
131 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_LS), board_82599 },
132 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_QSFP_SF_QP), board_82599 },
133 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599EN_SFP), board_82599 },
134 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF_QP), board_82599 },
135 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T1), board_X540 },
136 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550T), board_X550},
137 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_KX4), board_X550EM_x},
138 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_KR), board_X550EM_x},
139 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_10G_T), board_X550EM_x},
140 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_SFP), board_X550EM_x},
141 /* required last entry */
142 {0, }
143 };
144 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
145
146 #ifdef CONFIG_IXGBE_DCA
147 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
148 void *p);
149 static struct notifier_block dca_notifier = {
150 .notifier_call = ixgbe_notify_dca,
151 .next = NULL,
152 .priority = 0
153 };
154 #endif
155
156 #ifdef CONFIG_PCI_IOV
157 static unsigned int max_vfs;
158 module_param(max_vfs, uint, 0);
159 MODULE_PARM_DESC(max_vfs,
160 "Maximum number of virtual functions to allocate per physical function - default is zero and maximum value is 63. (Deprecated)");
161 #endif /* CONFIG_PCI_IOV */
162
163 static unsigned int allow_unsupported_sfp;
164 module_param(allow_unsupported_sfp, uint, 0);
165 MODULE_PARM_DESC(allow_unsupported_sfp,
166 "Allow unsupported and untested SFP+ modules on 82599-based adapters");
167
168 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
169 static int debug = -1;
170 module_param(debug, int, 0);
171 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
172
173 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
174 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
175 MODULE_LICENSE("GPL");
176 MODULE_VERSION(DRV_VERSION);
177
178 static struct workqueue_struct *ixgbe_wq;
179
180 static bool ixgbe_check_cfg_remove(struct ixgbe_hw *hw, struct pci_dev *pdev);
181
182 static int ixgbe_read_pci_cfg_word_parent(struct ixgbe_adapter *adapter,
183 u32 reg, u16 *value)
184 {
185 struct pci_dev *parent_dev;
186 struct pci_bus *parent_bus;
187
188 parent_bus = adapter->pdev->bus->parent;
189 if (!parent_bus)
190 return -1;
191
192 parent_dev = parent_bus->self;
193 if (!parent_dev)
194 return -1;
195
196 if (!pci_is_pcie(parent_dev))
197 return -1;
198
199 pcie_capability_read_word(parent_dev, reg, value);
200 if (*value == IXGBE_FAILED_READ_CFG_WORD &&
201 ixgbe_check_cfg_remove(&adapter->hw, parent_dev))
202 return -1;
203 return 0;
204 }
205
206 static s32 ixgbe_get_parent_bus_info(struct ixgbe_adapter *adapter)
207 {
208 struct ixgbe_hw *hw = &adapter->hw;
209 u16 link_status = 0;
210 int err;
211
212 hw->bus.type = ixgbe_bus_type_pci_express;
213
214 /* Get the negotiated link width and speed from PCI config space of the
215 * parent, as this device is behind a switch
216 */
217 err = ixgbe_read_pci_cfg_word_parent(adapter, 18, &link_status);
218
219 /* assume caller will handle error case */
220 if (err)
221 return err;
222
223 hw->bus.width = ixgbe_convert_bus_width(link_status);
224 hw->bus.speed = ixgbe_convert_bus_speed(link_status);
225
226 return 0;
227 }
228
229 /**
230 * ixgbe_check_from_parent - Determine whether PCIe info should come from parent
231 * @hw: hw specific details
232 *
233 * This function is used by probe to determine whether a device's PCI-Express
234 * bandwidth details should be gathered from the parent bus instead of from the
235 * device. Used to ensure that various locations all have the correct device ID
236 * checks.
237 */
238 static inline bool ixgbe_pcie_from_parent(struct ixgbe_hw *hw)
239 {
240 switch (hw->device_id) {
241 case IXGBE_DEV_ID_82599_SFP_SF_QP:
242 case IXGBE_DEV_ID_82599_QSFP_SF_QP:
243 return true;
244 default:
245 return false;
246 }
247 }
248
249 static void ixgbe_check_minimum_link(struct ixgbe_adapter *adapter,
250 int expected_gts)
251 {
252 struct ixgbe_hw *hw = &adapter->hw;
253 int max_gts = 0;
254 enum pci_bus_speed speed = PCI_SPEED_UNKNOWN;
255 enum pcie_link_width width = PCIE_LNK_WIDTH_UNKNOWN;
256 struct pci_dev *pdev;
257
258 /* Some devices are not connected over PCIe and thus do not negotiate
259 * speed. These devices do not have valid bus info, and thus any report
260 * we generate may not be correct.
261 */
262 if (hw->bus.type == ixgbe_bus_type_internal)
263 return;
264
265 /* determine whether to use the parent device */
266 if (ixgbe_pcie_from_parent(&adapter->hw))
267 pdev = adapter->pdev->bus->parent->self;
268 else
269 pdev = adapter->pdev;
270
271 if (pcie_get_minimum_link(pdev, &speed, &width) ||
272 speed == PCI_SPEED_UNKNOWN || width == PCIE_LNK_WIDTH_UNKNOWN) {
273 e_dev_warn("Unable to determine PCI Express bandwidth.\n");
274 return;
275 }
276
277 switch (speed) {
278 case PCIE_SPEED_2_5GT:
279 /* 8b/10b encoding reduces max throughput by 20% */
280 max_gts = 2 * width;
281 break;
282 case PCIE_SPEED_5_0GT:
283 /* 8b/10b encoding reduces max throughput by 20% */
284 max_gts = 4 * width;
285 break;
286 case PCIE_SPEED_8_0GT:
287 /* 128b/130b encoding reduces throughput by less than 2% */
288 max_gts = 8 * width;
289 break;
290 default:
291 e_dev_warn("Unable to determine PCI Express bandwidth.\n");
292 return;
293 }
294
295 e_dev_info("PCI Express bandwidth of %dGT/s available\n",
296 max_gts);
297 e_dev_info("(Speed:%s, Width: x%d, Encoding Loss:%s)\n",
298 (speed == PCIE_SPEED_8_0GT ? "8.0GT/s" :
299 speed == PCIE_SPEED_5_0GT ? "5.0GT/s" :
300 speed == PCIE_SPEED_2_5GT ? "2.5GT/s" :
301 "Unknown"),
302 width,
303 (speed == PCIE_SPEED_2_5GT ? "20%" :
304 speed == PCIE_SPEED_5_0GT ? "20%" :
305 speed == PCIE_SPEED_8_0GT ? "<2%" :
306 "Unknown"));
307
308 if (max_gts < expected_gts) {
309 e_dev_warn("This is not sufficient for optimal performance of this card.\n");
310 e_dev_warn("For optimal performance, at least %dGT/s of bandwidth is required.\n",
311 expected_gts);
312 e_dev_warn("A slot with more lanes and/or higher speed is suggested.\n");
313 }
314 }
315
316 static void ixgbe_service_event_schedule(struct ixgbe_adapter *adapter)
317 {
318 if (!test_bit(__IXGBE_DOWN, &adapter->state) &&
319 !test_bit(__IXGBE_REMOVING, &adapter->state) &&
320 !test_and_set_bit(__IXGBE_SERVICE_SCHED, &adapter->state))
321 queue_work(ixgbe_wq, &adapter->service_task);
322 }
323
324 static void ixgbe_remove_adapter(struct ixgbe_hw *hw)
325 {
326 struct ixgbe_adapter *adapter = hw->back;
327
328 if (!hw->hw_addr)
329 return;
330 hw->hw_addr = NULL;
331 e_dev_err("Adapter removed\n");
332 if (test_bit(__IXGBE_SERVICE_INITED, &adapter->state))
333 ixgbe_service_event_schedule(adapter);
334 }
335
336 static void ixgbe_check_remove(struct ixgbe_hw *hw, u32 reg)
337 {
338 u32 value;
339
340 /* The following check not only optimizes a bit by not
341 * performing a read on the status register when the
342 * register just read was a status register read that
343 * returned IXGBE_FAILED_READ_REG. It also blocks any
344 * potential recursion.
345 */
346 if (reg == IXGBE_STATUS) {
347 ixgbe_remove_adapter(hw);
348 return;
349 }
350 value = ixgbe_read_reg(hw, IXGBE_STATUS);
351 if (value == IXGBE_FAILED_READ_REG)
352 ixgbe_remove_adapter(hw);
353 }
354
355 /**
356 * ixgbe_read_reg - Read from device register
357 * @hw: hw specific details
358 * @reg: offset of register to read
359 *
360 * Returns : value read or IXGBE_FAILED_READ_REG if removed
361 *
362 * This function is used to read device registers. It checks for device
363 * removal by confirming any read that returns all ones by checking the
364 * status register value for all ones. This function avoids reading from
365 * the hardware if a removal was previously detected in which case it
366 * returns IXGBE_FAILED_READ_REG (all ones).
367 */
368 u32 ixgbe_read_reg(struct ixgbe_hw *hw, u32 reg)
369 {
370 u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr);
371 u32 value;
372
373 if (ixgbe_removed(reg_addr))
374 return IXGBE_FAILED_READ_REG;
375 value = readl(reg_addr + reg);
376 if (unlikely(value == IXGBE_FAILED_READ_REG))
377 ixgbe_check_remove(hw, reg);
378 return value;
379 }
380
381 static bool ixgbe_check_cfg_remove(struct ixgbe_hw *hw, struct pci_dev *pdev)
382 {
383 u16 value;
384
385 pci_read_config_word(pdev, PCI_VENDOR_ID, &value);
386 if (value == IXGBE_FAILED_READ_CFG_WORD) {
387 ixgbe_remove_adapter(hw);
388 return true;
389 }
390 return false;
391 }
392
393 u16 ixgbe_read_pci_cfg_word(struct ixgbe_hw *hw, u32 reg)
394 {
395 struct ixgbe_adapter *adapter = hw->back;
396 u16 value;
397
398 if (ixgbe_removed(hw->hw_addr))
399 return IXGBE_FAILED_READ_CFG_WORD;
400 pci_read_config_word(adapter->pdev, reg, &value);
401 if (value == IXGBE_FAILED_READ_CFG_WORD &&
402 ixgbe_check_cfg_remove(hw, adapter->pdev))
403 return IXGBE_FAILED_READ_CFG_WORD;
404 return value;
405 }
406
407 #ifdef CONFIG_PCI_IOV
408 static u32 ixgbe_read_pci_cfg_dword(struct ixgbe_hw *hw, u32 reg)
409 {
410 struct ixgbe_adapter *adapter = hw->back;
411 u32 value;
412
413 if (ixgbe_removed(hw->hw_addr))
414 return IXGBE_FAILED_READ_CFG_DWORD;
415 pci_read_config_dword(adapter->pdev, reg, &value);
416 if (value == IXGBE_FAILED_READ_CFG_DWORD &&
417 ixgbe_check_cfg_remove(hw, adapter->pdev))
418 return IXGBE_FAILED_READ_CFG_DWORD;
419 return value;
420 }
421 #endif /* CONFIG_PCI_IOV */
422
423 void ixgbe_write_pci_cfg_word(struct ixgbe_hw *hw, u32 reg, u16 value)
424 {
425 struct ixgbe_adapter *adapter = hw->back;
426
427 if (ixgbe_removed(hw->hw_addr))
428 return;
429 pci_write_config_word(adapter->pdev, reg, value);
430 }
431
432 static void ixgbe_service_event_complete(struct ixgbe_adapter *adapter)
433 {
434 BUG_ON(!test_bit(__IXGBE_SERVICE_SCHED, &adapter->state));
435
436 /* flush memory to make sure state is correct before next watchdog */
437 smp_mb__before_atomic();
438 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
439 }
440
441 struct ixgbe_reg_info {
442 u32 ofs;
443 char *name;
444 };
445
446 static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {
447
448 /* General Registers */
449 {IXGBE_CTRL, "CTRL"},
450 {IXGBE_STATUS, "STATUS"},
451 {IXGBE_CTRL_EXT, "CTRL_EXT"},
452
453 /* Interrupt Registers */
454 {IXGBE_EICR, "EICR"},
455
456 /* RX Registers */
457 {IXGBE_SRRCTL(0), "SRRCTL"},
458 {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
459 {IXGBE_RDLEN(0), "RDLEN"},
460 {IXGBE_RDH(0), "RDH"},
461 {IXGBE_RDT(0), "RDT"},
462 {IXGBE_RXDCTL(0), "RXDCTL"},
463 {IXGBE_RDBAL(0), "RDBAL"},
464 {IXGBE_RDBAH(0), "RDBAH"},
465
466 /* TX Registers */
467 {IXGBE_TDBAL(0), "TDBAL"},
468 {IXGBE_TDBAH(0), "TDBAH"},
469 {IXGBE_TDLEN(0), "TDLEN"},
470 {IXGBE_TDH(0), "TDH"},
471 {IXGBE_TDT(0), "TDT"},
472 {IXGBE_TXDCTL(0), "TXDCTL"},
473
474 /* List Terminator */
475 { .name = NULL }
476 };
477
478
479 /*
480 * ixgbe_regdump - register printout routine
481 */
482 static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
483 {
484 int i = 0, j = 0;
485 char rname[16];
486 u32 regs[64];
487
488 switch (reginfo->ofs) {
489 case IXGBE_SRRCTL(0):
490 for (i = 0; i < 64; i++)
491 regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
492 break;
493 case IXGBE_DCA_RXCTRL(0):
494 for (i = 0; i < 64; i++)
495 regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
496 break;
497 case IXGBE_RDLEN(0):
498 for (i = 0; i < 64; i++)
499 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
500 break;
501 case IXGBE_RDH(0):
502 for (i = 0; i < 64; i++)
503 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
504 break;
505 case IXGBE_RDT(0):
506 for (i = 0; i < 64; i++)
507 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
508 break;
509 case IXGBE_RXDCTL(0):
510 for (i = 0; i < 64; i++)
511 regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
512 break;
513 case IXGBE_RDBAL(0):
514 for (i = 0; i < 64; i++)
515 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
516 break;
517 case IXGBE_RDBAH(0):
518 for (i = 0; i < 64; i++)
519 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
520 break;
521 case IXGBE_TDBAL(0):
522 for (i = 0; i < 64; i++)
523 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
524 break;
525 case IXGBE_TDBAH(0):
526 for (i = 0; i < 64; i++)
527 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
528 break;
529 case IXGBE_TDLEN(0):
530 for (i = 0; i < 64; i++)
531 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
532 break;
533 case IXGBE_TDH(0):
534 for (i = 0; i < 64; i++)
535 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
536 break;
537 case IXGBE_TDT(0):
538 for (i = 0; i < 64; i++)
539 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
540 break;
541 case IXGBE_TXDCTL(0):
542 for (i = 0; i < 64; i++)
543 regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
544 break;
545 default:
546 pr_info("%-15s %08x\n", reginfo->name,
547 IXGBE_READ_REG(hw, reginfo->ofs));
548 return;
549 }
550
551 for (i = 0; i < 8; i++) {
552 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7);
553 pr_err("%-15s", rname);
554 for (j = 0; j < 8; j++)
555 pr_cont(" %08x", regs[i*8+j]);
556 pr_cont("\n");
557 }
558
559 }
560
561 /*
562 * ixgbe_dump - Print registers, tx-rings and rx-rings
563 */
564 static void ixgbe_dump(struct ixgbe_adapter *adapter)
565 {
566 struct net_device *netdev = adapter->netdev;
567 struct ixgbe_hw *hw = &adapter->hw;
568 struct ixgbe_reg_info *reginfo;
569 int n = 0;
570 struct ixgbe_ring *tx_ring;
571 struct ixgbe_tx_buffer *tx_buffer;
572 union ixgbe_adv_tx_desc *tx_desc;
573 struct my_u0 { u64 a; u64 b; } *u0;
574 struct ixgbe_ring *rx_ring;
575 union ixgbe_adv_rx_desc *rx_desc;
576 struct ixgbe_rx_buffer *rx_buffer_info;
577 u32 staterr;
578 int i = 0;
579
580 if (!netif_msg_hw(adapter))
581 return;
582
583 /* Print netdevice Info */
584 if (netdev) {
585 dev_info(&adapter->pdev->dev, "Net device Info\n");
586 pr_info("Device Name state "
587 "trans_start last_rx\n");
588 pr_info("%-15s %016lX %016lX %016lX\n",
589 netdev->name,
590 netdev->state,
591 netdev->trans_start,
592 netdev->last_rx);
593 }
594
595 /* Print Registers */
596 dev_info(&adapter->pdev->dev, "Register Dump\n");
597 pr_info(" Register Name Value\n");
598 for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
599 reginfo->name; reginfo++) {
600 ixgbe_regdump(hw, reginfo);
601 }
602
603 /* Print TX Ring Summary */
604 if (!netdev || !netif_running(netdev))
605 return;
606
607 dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
608 pr_info(" %s %s %s %s\n",
609 "Queue [NTU] [NTC] [bi(ntc)->dma ]",
610 "leng", "ntw", "timestamp");
611 for (n = 0; n < adapter->num_tx_queues; n++) {
612 tx_ring = adapter->tx_ring[n];
613 tx_buffer = &tx_ring->tx_buffer_info[tx_ring->next_to_clean];
614 pr_info(" %5d %5X %5X %016llX %08X %p %016llX\n",
615 n, tx_ring->next_to_use, tx_ring->next_to_clean,
616 (u64)dma_unmap_addr(tx_buffer, dma),
617 dma_unmap_len(tx_buffer, len),
618 tx_buffer->next_to_watch,
619 (u64)tx_buffer->time_stamp);
620 }
621
622 /* Print TX Rings */
623 if (!netif_msg_tx_done(adapter))
624 goto rx_ring_summary;
625
626 dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
627
628 /* Transmit Descriptor Formats
629 *
630 * 82598 Advanced Transmit Descriptor
631 * +--------------------------------------------------------------+
632 * 0 | Buffer Address [63:0] |
633 * +--------------------------------------------------------------+
634 * 8 | PAYLEN | POPTS | IDX | STA | DCMD |DTYP | RSV | DTALEN |
635 * +--------------------------------------------------------------+
636 * 63 46 45 40 39 36 35 32 31 24 23 20 19 0
637 *
638 * 82598 Advanced Transmit Descriptor (Write-Back Format)
639 * +--------------------------------------------------------------+
640 * 0 | RSV [63:0] |
641 * +--------------------------------------------------------------+
642 * 8 | RSV | STA | NXTSEQ |
643 * +--------------------------------------------------------------+
644 * 63 36 35 32 31 0
645 *
646 * 82599+ Advanced Transmit Descriptor
647 * +--------------------------------------------------------------+
648 * 0 | Buffer Address [63:0] |
649 * +--------------------------------------------------------------+
650 * 8 |PAYLEN |POPTS|CC|IDX |STA |DCMD |DTYP |MAC |RSV |DTALEN |
651 * +--------------------------------------------------------------+
652 * 63 46 45 40 39 38 36 35 32 31 24 23 20 19 18 17 16 15 0
653 *
654 * 82599+ Advanced Transmit Descriptor (Write-Back Format)
655 * +--------------------------------------------------------------+
656 * 0 | RSV [63:0] |
657 * +--------------------------------------------------------------+
658 * 8 | RSV | STA | RSV |
659 * +--------------------------------------------------------------+
660 * 63 36 35 32 31 0
661 */
662
663 for (n = 0; n < adapter->num_tx_queues; n++) {
664 tx_ring = adapter->tx_ring[n];
665 pr_info("------------------------------------\n");
666 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index);
667 pr_info("------------------------------------\n");
668 pr_info("%s%s %s %s %s %s\n",
669 "T [desc] [address 63:0 ] ",
670 "[PlPOIdStDDt Ln] [bi->dma ] ",
671 "leng", "ntw", "timestamp", "bi->skb");
672
673 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
674 tx_desc = IXGBE_TX_DESC(tx_ring, i);
675 tx_buffer = &tx_ring->tx_buffer_info[i];
676 u0 = (struct my_u0 *)tx_desc;
677 if (dma_unmap_len(tx_buffer, len) > 0) {
678 pr_info("T [0x%03X] %016llX %016llX %016llX %08X %p %016llX %p",
679 i,
680 le64_to_cpu(u0->a),
681 le64_to_cpu(u0->b),
682 (u64)dma_unmap_addr(tx_buffer, dma),
683 dma_unmap_len(tx_buffer, len),
684 tx_buffer->next_to_watch,
685 (u64)tx_buffer->time_stamp,
686 tx_buffer->skb);
687 if (i == tx_ring->next_to_use &&
688 i == tx_ring->next_to_clean)
689 pr_cont(" NTC/U\n");
690 else if (i == tx_ring->next_to_use)
691 pr_cont(" NTU\n");
692 else if (i == tx_ring->next_to_clean)
693 pr_cont(" NTC\n");
694 else
695 pr_cont("\n");
696
697 if (netif_msg_pktdata(adapter) &&
698 tx_buffer->skb)
699 print_hex_dump(KERN_INFO, "",
700 DUMP_PREFIX_ADDRESS, 16, 1,
701 tx_buffer->skb->data,
702 dma_unmap_len(tx_buffer, len),
703 true);
704 }
705 }
706 }
707
708 /* Print RX Rings Summary */
709 rx_ring_summary:
710 dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
711 pr_info("Queue [NTU] [NTC]\n");
712 for (n = 0; n < adapter->num_rx_queues; n++) {
713 rx_ring = adapter->rx_ring[n];
714 pr_info("%5d %5X %5X\n",
715 n, rx_ring->next_to_use, rx_ring->next_to_clean);
716 }
717
718 /* Print RX Rings */
719 if (!netif_msg_rx_status(adapter))
720 return;
721
722 dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
723
724 /* Receive Descriptor Formats
725 *
726 * 82598 Advanced Receive Descriptor (Read) Format
727 * 63 1 0
728 * +-----------------------------------------------------+
729 * 0 | Packet Buffer Address [63:1] |A0/NSE|
730 * +----------------------------------------------+------+
731 * 8 | Header Buffer Address [63:1] | DD |
732 * +-----------------------------------------------------+
733 *
734 *
735 * 82598 Advanced Receive Descriptor (Write-Back) Format
736 *
737 * 63 48 47 32 31 30 21 20 16 15 4 3 0
738 * +------------------------------------------------------+
739 * 0 | RSS Hash / |SPH| HDR_LEN | RSV |Packet| RSS |
740 * | Packet | IP | | | | Type | Type |
741 * | Checksum | Ident | | | | | |
742 * +------------------------------------------------------+
743 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
744 * +------------------------------------------------------+
745 * 63 48 47 32 31 20 19 0
746 *
747 * 82599+ Advanced Receive Descriptor (Read) Format
748 * 63 1 0
749 * +-----------------------------------------------------+
750 * 0 | Packet Buffer Address [63:1] |A0/NSE|
751 * +----------------------------------------------+------+
752 * 8 | Header Buffer Address [63:1] | DD |
753 * +-----------------------------------------------------+
754 *
755 *
756 * 82599+ Advanced Receive Descriptor (Write-Back) Format
757 *
758 * 63 48 47 32 31 30 21 20 17 16 4 3 0
759 * +------------------------------------------------------+
760 * 0 |RSS / Frag Checksum|SPH| HDR_LEN |RSC- |Packet| RSS |
761 * |/ RTT / PCoE_PARAM | | | CNT | Type | Type |
762 * |/ Flow Dir Flt ID | | | | | |
763 * +------------------------------------------------------+
764 * 8 | VLAN Tag | Length |Extended Error| Xtnd Status/NEXTP |
765 * +------------------------------------------------------+
766 * 63 48 47 32 31 20 19 0
767 */
768
769 for (n = 0; n < adapter->num_rx_queues; n++) {
770 rx_ring = adapter->rx_ring[n];
771 pr_info("------------------------------------\n");
772 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index);
773 pr_info("------------------------------------\n");
774 pr_info("%s%s%s",
775 "R [desc] [ PktBuf A0] ",
776 "[ HeadBuf DD] [bi->dma ] [bi->skb ] ",
777 "<-- Adv Rx Read format\n");
778 pr_info("%s%s%s",
779 "RWB[desc] [PcsmIpSHl PtRs] ",
780 "[vl er S cks ln] ---------------- [bi->skb ] ",
781 "<-- Adv Rx Write-Back format\n");
782
783 for (i = 0; i < rx_ring->count; i++) {
784 rx_buffer_info = &rx_ring->rx_buffer_info[i];
785 rx_desc = IXGBE_RX_DESC(rx_ring, i);
786 u0 = (struct my_u0 *)rx_desc;
787 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
788 if (staterr & IXGBE_RXD_STAT_DD) {
789 /* Descriptor Done */
790 pr_info("RWB[0x%03X] %016llX "
791 "%016llX ---------------- %p", i,
792 le64_to_cpu(u0->a),
793 le64_to_cpu(u0->b),
794 rx_buffer_info->skb);
795 } else {
796 pr_info("R [0x%03X] %016llX "
797 "%016llX %016llX %p", i,
798 le64_to_cpu(u0->a),
799 le64_to_cpu(u0->b),
800 (u64)rx_buffer_info->dma,
801 rx_buffer_info->skb);
802
803 if (netif_msg_pktdata(adapter) &&
804 rx_buffer_info->dma) {
805 print_hex_dump(KERN_INFO, "",
806 DUMP_PREFIX_ADDRESS, 16, 1,
807 page_address(rx_buffer_info->page) +
808 rx_buffer_info->page_offset,
809 ixgbe_rx_bufsz(rx_ring), true);
810 }
811 }
812
813 if (i == rx_ring->next_to_use)
814 pr_cont(" NTU\n");
815 else if (i == rx_ring->next_to_clean)
816 pr_cont(" NTC\n");
817 else
818 pr_cont("\n");
819
820 }
821 }
822 }
823
824 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
825 {
826 u32 ctrl_ext;
827
828 /* Let firmware take over control of h/w */
829 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
830 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
831 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
832 }
833
834 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
835 {
836 u32 ctrl_ext;
837
838 /* Let firmware know the driver has taken over */
839 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
840 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
841 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
842 }
843
844 /**
845 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
846 * @adapter: pointer to adapter struct
847 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
848 * @queue: queue to map the corresponding interrupt to
849 * @msix_vector: the vector to map to the corresponding queue
850 *
851 */
852 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
853 u8 queue, u8 msix_vector)
854 {
855 u32 ivar, index;
856 struct ixgbe_hw *hw = &adapter->hw;
857 switch (hw->mac.type) {
858 case ixgbe_mac_82598EB:
859 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
860 if (direction == -1)
861 direction = 0;
862 index = (((direction * 64) + queue) >> 2) & 0x1F;
863 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
864 ivar &= ~(0xFF << (8 * (queue & 0x3)));
865 ivar |= (msix_vector << (8 * (queue & 0x3)));
866 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
867 break;
868 case ixgbe_mac_82599EB:
869 case ixgbe_mac_X540:
870 case ixgbe_mac_X550:
871 case ixgbe_mac_X550EM_x:
872 if (direction == -1) {
873 /* other causes */
874 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
875 index = ((queue & 1) * 8);
876 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
877 ivar &= ~(0xFF << index);
878 ivar |= (msix_vector << index);
879 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
880 break;
881 } else {
882 /* tx or rx causes */
883 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
884 index = ((16 * (queue & 1)) + (8 * direction));
885 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
886 ivar &= ~(0xFF << index);
887 ivar |= (msix_vector << index);
888 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
889 break;
890 }
891 default:
892 break;
893 }
894 }
895
896 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
897 u64 qmask)
898 {
899 u32 mask;
900
901 switch (adapter->hw.mac.type) {
902 case ixgbe_mac_82598EB:
903 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
904 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
905 break;
906 case ixgbe_mac_82599EB:
907 case ixgbe_mac_X540:
908 case ixgbe_mac_X550:
909 case ixgbe_mac_X550EM_x:
910 mask = (qmask & 0xFFFFFFFF);
911 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
912 mask = (qmask >> 32);
913 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
914 break;
915 default:
916 break;
917 }
918 }
919
920 void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *ring,
921 struct ixgbe_tx_buffer *tx_buffer)
922 {
923 if (tx_buffer->skb) {
924 dev_kfree_skb_any(tx_buffer->skb);
925 if (dma_unmap_len(tx_buffer, len))
926 dma_unmap_single(ring->dev,
927 dma_unmap_addr(tx_buffer, dma),
928 dma_unmap_len(tx_buffer, len),
929 DMA_TO_DEVICE);
930 } else if (dma_unmap_len(tx_buffer, len)) {
931 dma_unmap_page(ring->dev,
932 dma_unmap_addr(tx_buffer, dma),
933 dma_unmap_len(tx_buffer, len),
934 DMA_TO_DEVICE);
935 }
936 tx_buffer->next_to_watch = NULL;
937 tx_buffer->skb = NULL;
938 dma_unmap_len_set(tx_buffer, len, 0);
939 /* tx_buffer must be completely set up in the transmit path */
940 }
941
942 static void ixgbe_update_xoff_rx_lfc(struct ixgbe_adapter *adapter)
943 {
944 struct ixgbe_hw *hw = &adapter->hw;
945 struct ixgbe_hw_stats *hwstats = &adapter->stats;
946 int i;
947 u32 data;
948
949 if ((hw->fc.current_mode != ixgbe_fc_full) &&
950 (hw->fc.current_mode != ixgbe_fc_rx_pause))
951 return;
952
953 switch (hw->mac.type) {
954 case ixgbe_mac_82598EB:
955 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
956 break;
957 default:
958 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
959 }
960 hwstats->lxoffrxc += data;
961
962 /* refill credits (no tx hang) if we received xoff */
963 if (!data)
964 return;
965
966 for (i = 0; i < adapter->num_tx_queues; i++)
967 clear_bit(__IXGBE_HANG_CHECK_ARMED,
968 &adapter->tx_ring[i]->state);
969 }
970
971 static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter)
972 {
973 struct ixgbe_hw *hw = &adapter->hw;
974 struct ixgbe_hw_stats *hwstats = &adapter->stats;
975 u32 xoff[8] = {0};
976 u8 tc;
977 int i;
978 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
979
980 if (adapter->ixgbe_ieee_pfc)
981 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
982
983 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED) || !pfc_en) {
984 ixgbe_update_xoff_rx_lfc(adapter);
985 return;
986 }
987
988 /* update stats for each tc, only valid with PFC enabled */
989 for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) {
990 u32 pxoffrxc;
991
992 switch (hw->mac.type) {
993 case ixgbe_mac_82598EB:
994 pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
995 break;
996 default:
997 pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
998 }
999 hwstats->pxoffrxc[i] += pxoffrxc;
1000 /* Get the TC for given UP */
1001 tc = netdev_get_prio_tc_map(adapter->netdev, i);
1002 xoff[tc] += pxoffrxc;
1003 }
1004
1005 /* disarm tx queues that have received xoff frames */
1006 for (i = 0; i < adapter->num_tx_queues; i++) {
1007 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
1008
1009 tc = tx_ring->dcb_tc;
1010 if (xoff[tc])
1011 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
1012 }
1013 }
1014
1015 static u64 ixgbe_get_tx_completed(struct ixgbe_ring *ring)
1016 {
1017 return ring->stats.packets;
1018 }
1019
1020 static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring)
1021 {
1022 struct ixgbe_adapter *adapter;
1023 struct ixgbe_hw *hw;
1024 u32 head, tail;
1025
1026 if (ring->l2_accel_priv)
1027 adapter = ring->l2_accel_priv->real_adapter;
1028 else
1029 adapter = netdev_priv(ring->netdev);
1030
1031 hw = &adapter->hw;
1032 head = IXGBE_READ_REG(hw, IXGBE_TDH(ring->reg_idx));
1033 tail = IXGBE_READ_REG(hw, IXGBE_TDT(ring->reg_idx));
1034
1035 if (head != tail)
1036 return (head < tail) ?
1037 tail - head : (tail + ring->count - head);
1038
1039 return 0;
1040 }
1041
1042 static inline bool ixgbe_check_tx_hang(struct ixgbe_ring *tx_ring)
1043 {
1044 u32 tx_done = ixgbe_get_tx_completed(tx_ring);
1045 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
1046 u32 tx_pending = ixgbe_get_tx_pending(tx_ring);
1047
1048 clear_check_for_tx_hang(tx_ring);
1049
1050 /*
1051 * Check for a hung queue, but be thorough. This verifies
1052 * that a transmit has been completed since the previous
1053 * check AND there is at least one packet pending. The
1054 * ARMED bit is set to indicate a potential hang. The
1055 * bit is cleared if a pause frame is received to remove
1056 * false hang detection due to PFC or 802.3x frames. By
1057 * requiring this to fail twice we avoid races with
1058 * pfc clearing the ARMED bit and conditions where we
1059 * run the check_tx_hang logic with a transmit completion
1060 * pending but without time to complete it yet.
1061 */
1062 if (tx_done_old == tx_done && tx_pending)
1063 /* make sure it is true for two checks in a row */
1064 return test_and_set_bit(__IXGBE_HANG_CHECK_ARMED,
1065 &tx_ring->state);
1066 /* update completed stats and continue */
1067 tx_ring->tx_stats.tx_done_old = tx_done;
1068 /* reset the countdown */
1069 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
1070
1071 return false;
1072 }
1073
1074 /**
1075 * ixgbe_tx_timeout_reset - initiate reset due to Tx timeout
1076 * @adapter: driver private struct
1077 **/
1078 static void ixgbe_tx_timeout_reset(struct ixgbe_adapter *adapter)
1079 {
1080
1081 /* Do the reset outside of interrupt context */
1082 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1083 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
1084 e_warn(drv, "initiating reset due to tx timeout\n");
1085 ixgbe_service_event_schedule(adapter);
1086 }
1087 }
1088
1089 /**
1090 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
1091 * @q_vector: structure containing interrupt and ring information
1092 * @tx_ring: tx ring to clean
1093 **/
1094 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
1095 struct ixgbe_ring *tx_ring, int napi_budget)
1096 {
1097 struct ixgbe_adapter *adapter = q_vector->adapter;
1098 struct ixgbe_tx_buffer *tx_buffer;
1099 union ixgbe_adv_tx_desc *tx_desc;
1100 unsigned int total_bytes = 0, total_packets = 0;
1101 unsigned int budget = q_vector->tx.work_limit;
1102 unsigned int i = tx_ring->next_to_clean;
1103
1104 if (test_bit(__IXGBE_DOWN, &adapter->state))
1105 return true;
1106
1107 tx_buffer = &tx_ring->tx_buffer_info[i];
1108 tx_desc = IXGBE_TX_DESC(tx_ring, i);
1109 i -= tx_ring->count;
1110
1111 do {
1112 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
1113
1114 /* if next_to_watch is not set then there is no work pending */
1115 if (!eop_desc)
1116 break;
1117
1118 /* prevent any other reads prior to eop_desc */
1119 read_barrier_depends();
1120
1121 /* if DD is not set pending work has not been completed */
1122 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
1123 break;
1124
1125 /* clear next_to_watch to prevent false hangs */
1126 tx_buffer->next_to_watch = NULL;
1127
1128 /* update the statistics for this packet */
1129 total_bytes += tx_buffer->bytecount;
1130 total_packets += tx_buffer->gso_segs;
1131
1132 /* free the skb */
1133 napi_consume_skb(tx_buffer->skb, napi_budget);
1134
1135 /* unmap skb header data */
1136 dma_unmap_single(tx_ring->dev,
1137 dma_unmap_addr(tx_buffer, dma),
1138 dma_unmap_len(tx_buffer, len),
1139 DMA_TO_DEVICE);
1140
1141 /* clear tx_buffer data */
1142 tx_buffer->skb = NULL;
1143 dma_unmap_len_set(tx_buffer, len, 0);
1144
1145 /* unmap remaining buffers */
1146 while (tx_desc != eop_desc) {
1147 tx_buffer++;
1148 tx_desc++;
1149 i++;
1150 if (unlikely(!i)) {
1151 i -= tx_ring->count;
1152 tx_buffer = tx_ring->tx_buffer_info;
1153 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
1154 }
1155
1156 /* unmap any remaining paged data */
1157 if (dma_unmap_len(tx_buffer, len)) {
1158 dma_unmap_page(tx_ring->dev,
1159 dma_unmap_addr(tx_buffer, dma),
1160 dma_unmap_len(tx_buffer, len),
1161 DMA_TO_DEVICE);
1162 dma_unmap_len_set(tx_buffer, len, 0);
1163 }
1164 }
1165
1166 /* move us one more past the eop_desc for start of next pkt */
1167 tx_buffer++;
1168 tx_desc++;
1169 i++;
1170 if (unlikely(!i)) {
1171 i -= tx_ring->count;
1172 tx_buffer = tx_ring->tx_buffer_info;
1173 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
1174 }
1175
1176 /* issue prefetch for next Tx descriptor */
1177 prefetch(tx_desc);
1178
1179 /* update budget accounting */
1180 budget--;
1181 } while (likely(budget));
1182
1183 i += tx_ring->count;
1184 tx_ring->next_to_clean = i;
1185 u64_stats_update_begin(&tx_ring->syncp);
1186 tx_ring->stats.bytes += total_bytes;
1187 tx_ring->stats.packets += total_packets;
1188 u64_stats_update_end(&tx_ring->syncp);
1189 q_vector->tx.total_bytes += total_bytes;
1190 q_vector->tx.total_packets += total_packets;
1191
1192 if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring)) {
1193 /* schedule immediate reset if we believe we hung */
1194 struct ixgbe_hw *hw = &adapter->hw;
1195 e_err(drv, "Detected Tx Unit Hang\n"
1196 " Tx Queue <%d>\n"
1197 " TDH, TDT <%x>, <%x>\n"
1198 " next_to_use <%x>\n"
1199 " next_to_clean <%x>\n"
1200 "tx_buffer_info[next_to_clean]\n"
1201 " time_stamp <%lx>\n"
1202 " jiffies <%lx>\n",
1203 tx_ring->queue_index,
1204 IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)),
1205 IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)),
1206 tx_ring->next_to_use, i,
1207 tx_ring->tx_buffer_info[i].time_stamp, jiffies);
1208
1209 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
1210
1211 e_info(probe,
1212 "tx hang %d detected on queue %d, resetting adapter\n",
1213 adapter->tx_timeout_count + 1, tx_ring->queue_index);
1214
1215 /* schedule immediate reset if we believe we hung */
1216 ixgbe_tx_timeout_reset(adapter);
1217
1218 /* the adapter is about to reset, no point in enabling stuff */
1219 return true;
1220 }
1221
1222 netdev_tx_completed_queue(txring_txq(tx_ring),
1223 total_packets, total_bytes);
1224
1225 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
1226 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
1227 (ixgbe_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
1228 /* Make sure that anybody stopping the queue after this
1229 * sees the new next_to_clean.
1230 */
1231 smp_mb();
1232 if (__netif_subqueue_stopped(tx_ring->netdev,
1233 tx_ring->queue_index)
1234 && !test_bit(__IXGBE_DOWN, &adapter->state)) {
1235 netif_wake_subqueue(tx_ring->netdev,
1236 tx_ring->queue_index);
1237 ++tx_ring->tx_stats.restart_queue;
1238 }
1239 }
1240
1241 return !!budget;
1242 }
1243
1244 #ifdef CONFIG_IXGBE_DCA
1245 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
1246 struct ixgbe_ring *tx_ring,
1247 int cpu)
1248 {
1249 struct ixgbe_hw *hw = &adapter->hw;
1250 u32 txctrl = 0;
1251 u16 reg_offset;
1252
1253 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1254 txctrl = dca3_get_tag(tx_ring->dev, cpu);
1255
1256 switch (hw->mac.type) {
1257 case ixgbe_mac_82598EB:
1258 reg_offset = IXGBE_DCA_TXCTRL(tx_ring->reg_idx);
1259 break;
1260 case ixgbe_mac_82599EB:
1261 case ixgbe_mac_X540:
1262 reg_offset = IXGBE_DCA_TXCTRL_82599(tx_ring->reg_idx);
1263 txctrl <<= IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599;
1264 break;
1265 default:
1266 /* for unknown hardware do not write register */
1267 return;
1268 }
1269
1270 /*
1271 * We can enable relaxed ordering for reads, but not writes when
1272 * DCA is enabled. This is due to a known issue in some chipsets
1273 * which will cause the DCA tag to be cleared.
1274 */
1275 txctrl |= IXGBE_DCA_TXCTRL_DESC_RRO_EN |
1276 IXGBE_DCA_TXCTRL_DATA_RRO_EN |
1277 IXGBE_DCA_TXCTRL_DESC_DCA_EN;
1278
1279 IXGBE_WRITE_REG(hw, reg_offset, txctrl);
1280 }
1281
1282 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
1283 struct ixgbe_ring *rx_ring,
1284 int cpu)
1285 {
1286 struct ixgbe_hw *hw = &adapter->hw;
1287 u32 rxctrl = 0;
1288 u8 reg_idx = rx_ring->reg_idx;
1289
1290 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1291 rxctrl = dca3_get_tag(rx_ring->dev, cpu);
1292
1293 switch (hw->mac.type) {
1294 case ixgbe_mac_82599EB:
1295 case ixgbe_mac_X540:
1296 rxctrl <<= IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599;
1297 break;
1298 default:
1299 break;
1300 }
1301
1302 /*
1303 * We can enable relaxed ordering for reads, but not writes when
1304 * DCA is enabled. This is due to a known issue in some chipsets
1305 * which will cause the DCA tag to be cleared.
1306 */
1307 rxctrl |= IXGBE_DCA_RXCTRL_DESC_RRO_EN |
1308 IXGBE_DCA_RXCTRL_DATA_DCA_EN |
1309 IXGBE_DCA_RXCTRL_DESC_DCA_EN;
1310
1311 IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl);
1312 }
1313
1314 static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
1315 {
1316 struct ixgbe_adapter *adapter = q_vector->adapter;
1317 struct ixgbe_ring *ring;
1318 int cpu = get_cpu();
1319
1320 if (q_vector->cpu == cpu)
1321 goto out_no_update;
1322
1323 ixgbe_for_each_ring(ring, q_vector->tx)
1324 ixgbe_update_tx_dca(adapter, ring, cpu);
1325
1326 ixgbe_for_each_ring(ring, q_vector->rx)
1327 ixgbe_update_rx_dca(adapter, ring, cpu);
1328
1329 q_vector->cpu = cpu;
1330 out_no_update:
1331 put_cpu();
1332 }
1333
1334 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
1335 {
1336 int i;
1337
1338 /* always use CB2 mode, difference is masked in the CB driver */
1339 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1340 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
1341 IXGBE_DCA_CTRL_DCA_MODE_CB2);
1342 else
1343 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
1344 IXGBE_DCA_CTRL_DCA_DISABLE);
1345
1346 for (i = 0; i < adapter->num_q_vectors; i++) {
1347 adapter->q_vector[i]->cpu = -1;
1348 ixgbe_update_dca(adapter->q_vector[i]);
1349 }
1350 }
1351
1352 static int __ixgbe_notify_dca(struct device *dev, void *data)
1353 {
1354 struct ixgbe_adapter *adapter = dev_get_drvdata(dev);
1355 unsigned long event = *(unsigned long *)data;
1356
1357 if (!(adapter->flags & IXGBE_FLAG_DCA_CAPABLE))
1358 return 0;
1359
1360 switch (event) {
1361 case DCA_PROVIDER_ADD:
1362 /* if we're already enabled, don't do it again */
1363 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1364 break;
1365 if (dca_add_requester(dev) == 0) {
1366 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
1367 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
1368 IXGBE_DCA_CTRL_DCA_MODE_CB2);
1369 break;
1370 }
1371 /* Fall Through since DCA is disabled. */
1372 case DCA_PROVIDER_REMOVE:
1373 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
1374 dca_remove_requester(dev);
1375 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
1376 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
1377 IXGBE_DCA_CTRL_DCA_DISABLE);
1378 }
1379 break;
1380 }
1381
1382 return 0;
1383 }
1384
1385 #endif /* CONFIG_IXGBE_DCA */
1386
1387 #define IXGBE_RSS_L4_TYPES_MASK \
1388 ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
1389 (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
1390 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
1391 (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))
1392
1393 static inline void ixgbe_rx_hash(struct ixgbe_ring *ring,
1394 union ixgbe_adv_rx_desc *rx_desc,
1395 struct sk_buff *skb)
1396 {
1397 u16 rss_type;
1398
1399 if (!(ring->netdev->features & NETIF_F_RXHASH))
1400 return;
1401
1402 rss_type = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info) &
1403 IXGBE_RXDADV_RSSTYPE_MASK;
1404
1405 if (!rss_type)
1406 return;
1407
1408 skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),
1409 (IXGBE_RSS_L4_TYPES_MASK & (1ul << rss_type)) ?
1410 PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
1411 }
1412
1413 #ifdef IXGBE_FCOE
1414 /**
1415 * ixgbe_rx_is_fcoe - check the rx desc for incoming pkt type
1416 * @ring: structure containing ring specific data
1417 * @rx_desc: advanced rx descriptor
1418 *
1419 * Returns : true if it is FCoE pkt
1420 */
1421 static inline bool ixgbe_rx_is_fcoe(struct ixgbe_ring *ring,
1422 union ixgbe_adv_rx_desc *rx_desc)
1423 {
1424 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1425
1426 return test_bit(__IXGBE_RX_FCOE, &ring->state) &&
1427 ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_ETQF_MASK)) ==
1428 (cpu_to_le16(IXGBE_ETQF_FILTER_FCOE <<
1429 IXGBE_RXDADV_PKTTYPE_ETQF_SHIFT)));
1430 }
1431
1432 #endif /* IXGBE_FCOE */
1433 /**
1434 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
1435 * @ring: structure containing ring specific data
1436 * @rx_desc: current Rx descriptor being processed
1437 * @skb: skb currently being received and modified
1438 **/
1439 static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
1440 union ixgbe_adv_rx_desc *rx_desc,
1441 struct sk_buff *skb)
1442 {
1443 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1444 __le16 hdr_info = rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
1445 bool encap_pkt = false;
1446
1447 skb_checksum_none_assert(skb);
1448
1449 /* Rx csum disabled */
1450 if (!(ring->netdev->features & NETIF_F_RXCSUM))
1451 return;
1452
1453 if ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_VXLAN)) &&
1454 (hdr_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_TUNNEL >> 16))) {
1455 encap_pkt = true;
1456 skb->encapsulation = 1;
1457 }
1458
1459 /* if IP and error */
1460 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
1461 ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
1462 ring->rx_stats.csum_err++;
1463 return;
1464 }
1465
1466 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
1467 return;
1468
1469 if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
1470 /*
1471 * 82599 errata, UDP frames with a 0 checksum can be marked as
1472 * checksum errors.
1473 */
1474 if ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_UDP)) &&
1475 test_bit(__IXGBE_RX_CSUM_UDP_ZERO_ERR, &ring->state))
1476 return;
1477
1478 ring->rx_stats.csum_err++;
1479 return;
1480 }
1481
1482 /* It must be a TCP or UDP packet with a valid checksum */
1483 skb->ip_summed = CHECKSUM_UNNECESSARY;
1484 if (encap_pkt) {
1485 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_OUTERIPCS))
1486 return;
1487
1488 if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_OUTERIPER)) {
1489 skb->ip_summed = CHECKSUM_NONE;
1490 return;
1491 }
1492 /* If we checked the outer header let the stack know */
1493 skb->csum_level = 1;
1494 }
1495 }
1496
1497 static bool ixgbe_alloc_mapped_page(struct ixgbe_ring *rx_ring,
1498 struct ixgbe_rx_buffer *bi)
1499 {
1500 struct page *page = bi->page;
1501 dma_addr_t dma;
1502
1503 /* since we are recycling buffers we should seldom need to alloc */
1504 if (likely(page))
1505 return true;
1506
1507 /* alloc new page for storage */
1508 page = dev_alloc_pages(ixgbe_rx_pg_order(rx_ring));
1509 if (unlikely(!page)) {
1510 rx_ring->rx_stats.alloc_rx_page_failed++;
1511 return false;
1512 }
1513
1514 /* map page for use */
1515 dma = dma_map_page(rx_ring->dev, page, 0,
1516 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
1517
1518 /*
1519 * if mapping failed free memory back to system since
1520 * there isn't much point in holding memory we can't use
1521 */
1522 if (dma_mapping_error(rx_ring->dev, dma)) {
1523 __free_pages(page, ixgbe_rx_pg_order(rx_ring));
1524
1525 rx_ring->rx_stats.alloc_rx_page_failed++;
1526 return false;
1527 }
1528
1529 bi->dma = dma;
1530 bi->page = page;
1531 bi->page_offset = 0;
1532
1533 return true;
1534 }
1535
1536 /**
1537 * ixgbe_alloc_rx_buffers - Replace used receive buffers
1538 * @rx_ring: ring to place buffers on
1539 * @cleaned_count: number of buffers to replace
1540 **/
1541 void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count)
1542 {
1543 union ixgbe_adv_rx_desc *rx_desc;
1544 struct ixgbe_rx_buffer *bi;
1545 u16 i = rx_ring->next_to_use;
1546
1547 /* nothing to do */
1548 if (!cleaned_count)
1549 return;
1550
1551 rx_desc = IXGBE_RX_DESC(rx_ring, i);
1552 bi = &rx_ring->rx_buffer_info[i];
1553 i -= rx_ring->count;
1554
1555 do {
1556 if (!ixgbe_alloc_mapped_page(rx_ring, bi))
1557 break;
1558
1559 /*
1560 * Refresh the desc even if buffer_addrs didn't change
1561 * because each write-back erases this info.
1562 */
1563 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
1564
1565 rx_desc++;
1566 bi++;
1567 i++;
1568 if (unlikely(!i)) {
1569 rx_desc = IXGBE_RX_DESC(rx_ring, 0);
1570 bi = rx_ring->rx_buffer_info;
1571 i -= rx_ring->count;
1572 }
1573
1574 /* clear the status bits for the next_to_use descriptor */
1575 rx_desc->wb.upper.status_error = 0;
1576
1577 cleaned_count--;
1578 } while (cleaned_count);
1579
1580 i += rx_ring->count;
1581
1582 if (rx_ring->next_to_use != i) {
1583 rx_ring->next_to_use = i;
1584
1585 /* update next to alloc since we have filled the ring */
1586 rx_ring->next_to_alloc = i;
1587
1588 /* Force memory writes to complete before letting h/w
1589 * know there are new descriptors to fetch. (Only
1590 * applicable for weak-ordered memory model archs,
1591 * such as IA-64).
1592 */
1593 wmb();
1594 writel(i, rx_ring->tail);
1595 }
1596 }
1597
1598 static void ixgbe_set_rsc_gso_size(struct ixgbe_ring *ring,
1599 struct sk_buff *skb)
1600 {
1601 u16 hdr_len = skb_headlen(skb);
1602
1603 /* set gso_size to avoid messing up TCP MSS */
1604 skb_shinfo(skb)->gso_size = DIV_ROUND_UP((skb->len - hdr_len),
1605 IXGBE_CB(skb)->append_cnt);
1606 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1607 }
1608
1609 static void ixgbe_update_rsc_stats(struct ixgbe_ring *rx_ring,
1610 struct sk_buff *skb)
1611 {
1612 /* if append_cnt is 0 then frame is not RSC */
1613 if (!IXGBE_CB(skb)->append_cnt)
1614 return;
1615
1616 rx_ring->rx_stats.rsc_count += IXGBE_CB(skb)->append_cnt;
1617 rx_ring->rx_stats.rsc_flush++;
1618
1619 ixgbe_set_rsc_gso_size(rx_ring, skb);
1620
1621 /* gso_size is computed using append_cnt so always clear it last */
1622 IXGBE_CB(skb)->append_cnt = 0;
1623 }
1624
1625 /**
1626 * ixgbe_process_skb_fields - Populate skb header fields from Rx descriptor
1627 * @rx_ring: rx descriptor ring packet is being transacted on
1628 * @rx_desc: pointer to the EOP Rx descriptor
1629 * @skb: pointer to current skb being populated
1630 *
1631 * This function checks the ring, descriptor, and packet information in
1632 * order to populate the hash, checksum, VLAN, timestamp, protocol, and
1633 * other fields within the skb.
1634 **/
1635 static void ixgbe_process_skb_fields(struct ixgbe_ring *rx_ring,
1636 union ixgbe_adv_rx_desc *rx_desc,
1637 struct sk_buff *skb)
1638 {
1639 struct net_device *dev = rx_ring->netdev;
1640 u32 flags = rx_ring->q_vector->adapter->flags;
1641
1642 ixgbe_update_rsc_stats(rx_ring, skb);
1643
1644 ixgbe_rx_hash(rx_ring, rx_desc, skb);
1645
1646 ixgbe_rx_checksum(rx_ring, rx_desc, skb);
1647
1648 if (unlikely(flags & IXGBE_FLAG_RX_HWTSTAMP_ENABLED))
1649 ixgbe_ptp_rx_hwtstamp(rx_ring, rx_desc, skb);
1650
1651 if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
1652 ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
1653 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
1654 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1655 }
1656
1657 skb_record_rx_queue(skb, rx_ring->queue_index);
1658
1659 skb->protocol = eth_type_trans(skb, dev);
1660 }
1661
1662 static void ixgbe_rx_skb(struct ixgbe_q_vector *q_vector,
1663 struct sk_buff *skb)
1664 {
1665 skb_mark_napi_id(skb, &q_vector->napi);
1666 if (ixgbe_qv_busy_polling(q_vector))
1667 netif_receive_skb(skb);
1668 else
1669 napi_gro_receive(&q_vector->napi, skb);
1670 }
1671
1672 /**
1673 * ixgbe_is_non_eop - process handling of non-EOP buffers
1674 * @rx_ring: Rx ring being processed
1675 * @rx_desc: Rx descriptor for current buffer
1676 * @skb: Current socket buffer containing buffer in progress
1677 *
1678 * This function updates next to clean. If the buffer is an EOP buffer
1679 * this function exits returning false, otherwise it will place the
1680 * sk_buff in the next buffer to be chained and return true indicating
1681 * that this is in fact a non-EOP buffer.
1682 **/
1683 static bool ixgbe_is_non_eop(struct ixgbe_ring *rx_ring,
1684 union ixgbe_adv_rx_desc *rx_desc,
1685 struct sk_buff *skb)
1686 {
1687 u32 ntc = rx_ring->next_to_clean + 1;
1688
1689 /* fetch, update, and store next to clean */
1690 ntc = (ntc < rx_ring->count) ? ntc : 0;
1691 rx_ring->next_to_clean = ntc;
1692
1693 prefetch(IXGBE_RX_DESC(rx_ring, ntc));
1694
1695 /* update RSC append count if present */
1696 if (ring_is_rsc_enabled(rx_ring)) {
1697 __le32 rsc_enabled = rx_desc->wb.lower.lo_dword.data &
1698 cpu_to_le32(IXGBE_RXDADV_RSCCNT_MASK);
1699
1700 if (unlikely(rsc_enabled)) {
1701 u32 rsc_cnt = le32_to_cpu(rsc_enabled);
1702
1703 rsc_cnt >>= IXGBE_RXDADV_RSCCNT_SHIFT;
1704 IXGBE_CB(skb)->append_cnt += rsc_cnt - 1;
1705
1706 /* update ntc based on RSC value */
1707 ntc = le32_to_cpu(rx_desc->wb.upper.status_error);
1708 ntc &= IXGBE_RXDADV_NEXTP_MASK;
1709 ntc >>= IXGBE_RXDADV_NEXTP_SHIFT;
1710 }
1711 }
1712
1713 /* if we are the last buffer then there is nothing else to do */
1714 if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
1715 return false;
1716
1717 /* place skb in next buffer to be received */
1718 rx_ring->rx_buffer_info[ntc].skb = skb;
1719 rx_ring->rx_stats.non_eop_descs++;
1720
1721 return true;
1722 }
1723
1724 /**
1725 * ixgbe_pull_tail - ixgbe specific version of skb_pull_tail
1726 * @rx_ring: rx descriptor ring packet is being transacted on
1727 * @skb: pointer to current skb being adjusted
1728 *
1729 * This function is an ixgbe specific version of __pskb_pull_tail. The
1730 * main difference between this version and the original function is that
1731 * this function can make several assumptions about the state of things
1732 * that allow for significant optimizations versus the standard function.
1733 * As a result we can do things like drop a frag and maintain an accurate
1734 * truesize for the skb.
1735 */
1736 static void ixgbe_pull_tail(struct ixgbe_ring *rx_ring,
1737 struct sk_buff *skb)
1738 {
1739 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
1740 unsigned char *va;
1741 unsigned int pull_len;
1742
1743 /*
1744 * it is valid to use page_address instead of kmap since we are
1745 * working with pages allocated out of the lomem pool per
1746 * alloc_page(GFP_ATOMIC)
1747 */
1748 va = skb_frag_address(frag);
1749
1750 /*
1751 * we need the header to contain the greater of either ETH_HLEN or
1752 * 60 bytes if the skb->len is less than 60 for skb_pad.
1753 */
1754 pull_len = eth_get_headlen(va, IXGBE_RX_HDR_SIZE);
1755
1756 /* align pull length to size of long to optimize memcpy performance */
1757 skb_copy_to_linear_data(skb, va, ALIGN(pull_len, sizeof(long)));
1758
1759 /* update all of the pointers */
1760 skb_frag_size_sub(frag, pull_len);
1761 frag->page_offset += pull_len;
1762 skb->data_len -= pull_len;
1763 skb->tail += pull_len;
1764 }
1765
1766 /**
1767 * ixgbe_dma_sync_frag - perform DMA sync for first frag of SKB
1768 * @rx_ring: rx descriptor ring packet is being transacted on
1769 * @skb: pointer to current skb being updated
1770 *
1771 * This function provides a basic DMA sync up for the first fragment of an
1772 * skb. The reason for doing this is that the first fragment cannot be
1773 * unmapped until we have reached the end of packet descriptor for a buffer
1774 * chain.
1775 */
1776 static void ixgbe_dma_sync_frag(struct ixgbe_ring *rx_ring,
1777 struct sk_buff *skb)
1778 {
1779 /* if the page was released unmap it, else just sync our portion */
1780 if (unlikely(IXGBE_CB(skb)->page_released)) {
1781 dma_unmap_page(rx_ring->dev, IXGBE_CB(skb)->dma,
1782 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
1783 IXGBE_CB(skb)->page_released = false;
1784 } else {
1785 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
1786
1787 dma_sync_single_range_for_cpu(rx_ring->dev,
1788 IXGBE_CB(skb)->dma,
1789 frag->page_offset,
1790 ixgbe_rx_bufsz(rx_ring),
1791 DMA_FROM_DEVICE);
1792 }
1793 IXGBE_CB(skb)->dma = 0;
1794 }
1795
1796 /**
1797 * ixgbe_cleanup_headers - Correct corrupted or empty headers
1798 * @rx_ring: rx descriptor ring packet is being transacted on
1799 * @rx_desc: pointer to the EOP Rx descriptor
1800 * @skb: pointer to current skb being fixed
1801 *
1802 * Check for corrupted packet headers caused by senders on the local L2
1803 * embedded NIC switch not setting up their Tx Descriptors right. These
1804 * should be very rare.
1805 *
1806 * Also address the case where we are pulling data in on pages only
1807 * and as such no data is present in the skb header.
1808 *
1809 * In addition if skb is not at least 60 bytes we need to pad it so that
1810 * it is large enough to qualify as a valid Ethernet frame.
1811 *
1812 * Returns true if an error was encountered and skb was freed.
1813 **/
1814 static bool ixgbe_cleanup_headers(struct ixgbe_ring *rx_ring,
1815 union ixgbe_adv_rx_desc *rx_desc,
1816 struct sk_buff *skb)
1817 {
1818 struct net_device *netdev = rx_ring->netdev;
1819
1820 /* verify that the packet does not have any known errors */
1821 if (unlikely(ixgbe_test_staterr(rx_desc,
1822 IXGBE_RXDADV_ERR_FRAME_ERR_MASK) &&
1823 !(netdev->features & NETIF_F_RXALL))) {
1824 dev_kfree_skb_any(skb);
1825 return true;
1826 }
1827
1828 /* place header in linear portion of buffer */
1829 if (skb_is_nonlinear(skb))
1830 ixgbe_pull_tail(rx_ring, skb);
1831
1832 #ifdef IXGBE_FCOE
1833 /* do not attempt to pad FCoE Frames as this will disrupt DDP */
1834 if (ixgbe_rx_is_fcoe(rx_ring, rx_desc))
1835 return false;
1836
1837 #endif
1838 /* if eth_skb_pad returns an error the skb was freed */
1839 if (eth_skb_pad(skb))
1840 return true;
1841
1842 return false;
1843 }
1844
1845 /**
1846 * ixgbe_reuse_rx_page - page flip buffer and store it back on the ring
1847 * @rx_ring: rx descriptor ring to store buffers on
1848 * @old_buff: donor buffer to have page reused
1849 *
1850 * Synchronizes page for reuse by the adapter
1851 **/
1852 static void ixgbe_reuse_rx_page(struct ixgbe_ring *rx_ring,
1853 struct ixgbe_rx_buffer *old_buff)
1854 {
1855 struct ixgbe_rx_buffer *new_buff;
1856 u16 nta = rx_ring->next_to_alloc;
1857
1858 new_buff = &rx_ring->rx_buffer_info[nta];
1859
1860 /* update, and store next to alloc */
1861 nta++;
1862 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
1863
1864 /* transfer page from old buffer to new buffer */
1865 *new_buff = *old_buff;
1866
1867 /* sync the buffer for use by the device */
1868 dma_sync_single_range_for_device(rx_ring->dev, new_buff->dma,
1869 new_buff->page_offset,
1870 ixgbe_rx_bufsz(rx_ring),
1871 DMA_FROM_DEVICE);
1872 }
1873
1874 static inline bool ixgbe_page_is_reserved(struct page *page)
1875 {
1876 return (page_to_nid(page) != numa_mem_id()) || page_is_pfmemalloc(page);
1877 }
1878
1879 /**
1880 * ixgbe_add_rx_frag - Add contents of Rx buffer to sk_buff
1881 * @rx_ring: rx descriptor ring to transact packets on
1882 * @rx_buffer: buffer containing page to add
1883 * @rx_desc: descriptor containing length of buffer written by hardware
1884 * @skb: sk_buff to place the data into
1885 *
1886 * This function will add the data contained in rx_buffer->page to the skb.
1887 * This is done either through a direct copy if the data in the buffer is
1888 * less than the skb header size, otherwise it will just attach the page as
1889 * a frag to the skb.
1890 *
1891 * The function will then update the page offset if necessary and return
1892 * true if the buffer can be reused by the adapter.
1893 **/
1894 static bool ixgbe_add_rx_frag(struct ixgbe_ring *rx_ring,
1895 struct ixgbe_rx_buffer *rx_buffer,
1896 union ixgbe_adv_rx_desc *rx_desc,
1897 struct sk_buff *skb)
1898 {
1899 struct page *page = rx_buffer->page;
1900 unsigned int size = le16_to_cpu(rx_desc->wb.upper.length);
1901 #if (PAGE_SIZE < 8192)
1902 unsigned int truesize = ixgbe_rx_bufsz(rx_ring);
1903 #else
1904 unsigned int truesize = ALIGN(size, L1_CACHE_BYTES);
1905 unsigned int last_offset = ixgbe_rx_pg_size(rx_ring) -
1906 ixgbe_rx_bufsz(rx_ring);
1907 #endif
1908
1909 if ((size <= IXGBE_RX_HDR_SIZE) && !skb_is_nonlinear(skb)) {
1910 unsigned char *va = page_address(page) + rx_buffer->page_offset;
1911
1912 memcpy(__skb_put(skb, size), va, ALIGN(size, sizeof(long)));
1913
1914 /* page is not reserved, we can reuse buffer as-is */
1915 if (likely(!ixgbe_page_is_reserved(page)))
1916 return true;
1917
1918 /* this page cannot be reused so discard it */
1919 __free_pages(page, ixgbe_rx_pg_order(rx_ring));
1920 return false;
1921 }
1922
1923 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
1924 rx_buffer->page_offset, size, truesize);
1925
1926 /* avoid re-using remote pages */
1927 if (unlikely(ixgbe_page_is_reserved(page)))
1928 return false;
1929
1930 #if (PAGE_SIZE < 8192)
1931 /* if we are only owner of page we can reuse it */
1932 if (unlikely(page_count(page) != 1))
1933 return false;
1934
1935 /* flip page offset to other buffer */
1936 rx_buffer->page_offset ^= truesize;
1937 #else
1938 /* move offset up to the next cache line */
1939 rx_buffer->page_offset += truesize;
1940
1941 if (rx_buffer->page_offset > last_offset)
1942 return false;
1943 #endif
1944
1945 /* Even if we own the page, we are not allowed to use atomic_set()
1946 * This would break get_page_unless_zero() users.
1947 */
1948 page_ref_inc(page);
1949
1950 return true;
1951 }
1952
1953 static struct sk_buff *ixgbe_fetch_rx_buffer(struct ixgbe_ring *rx_ring,
1954 union ixgbe_adv_rx_desc *rx_desc)
1955 {
1956 struct ixgbe_rx_buffer *rx_buffer;
1957 struct sk_buff *skb;
1958 struct page *page;
1959
1960 rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
1961 page = rx_buffer->page;
1962 prefetchw(page);
1963
1964 skb = rx_buffer->skb;
1965
1966 if (likely(!skb)) {
1967 void *page_addr = page_address(page) +
1968 rx_buffer->page_offset;
1969
1970 /* prefetch first cache line of first page */
1971 prefetch(page_addr);
1972 #if L1_CACHE_BYTES < 128
1973 prefetch(page_addr + L1_CACHE_BYTES);
1974 #endif
1975
1976 /* allocate a skb to store the frags */
1977 skb = napi_alloc_skb(&rx_ring->q_vector->napi,
1978 IXGBE_RX_HDR_SIZE);
1979 if (unlikely(!skb)) {
1980 rx_ring->rx_stats.alloc_rx_buff_failed++;
1981 return NULL;
1982 }
1983
1984 /*
1985 * we will be copying header into skb->data in
1986 * pskb_may_pull so it is in our interest to prefetch
1987 * it now to avoid a possible cache miss
1988 */
1989 prefetchw(skb->data);
1990
1991 /*
1992 * Delay unmapping of the first packet. It carries the
1993 * header information, HW may still access the header
1994 * after the writeback. Only unmap it when EOP is
1995 * reached
1996 */
1997 if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
1998 goto dma_sync;
1999
2000 IXGBE_CB(skb)->dma = rx_buffer->dma;
2001 } else {
2002 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP))
2003 ixgbe_dma_sync_frag(rx_ring, skb);
2004
2005 dma_sync:
2006 /* we are reusing so sync this buffer for CPU use */
2007 dma_sync_single_range_for_cpu(rx_ring->dev,
2008 rx_buffer->dma,
2009 rx_buffer->page_offset,
2010 ixgbe_rx_bufsz(rx_ring),
2011 DMA_FROM_DEVICE);
2012
2013 rx_buffer->skb = NULL;
2014 }
2015
2016 /* pull page into skb */
2017 if (ixgbe_add_rx_frag(rx_ring, rx_buffer, rx_desc, skb)) {
2018 /* hand second half of page back to the ring */
2019 ixgbe_reuse_rx_page(rx_ring, rx_buffer);
2020 } else if (IXGBE_CB(skb)->dma == rx_buffer->dma) {
2021 /* the page has been released from the ring */
2022 IXGBE_CB(skb)->page_released = true;
2023 } else {
2024 /* we are not reusing the buffer so unmap it */
2025 dma_unmap_page(rx_ring->dev, rx_buffer->dma,
2026 ixgbe_rx_pg_size(rx_ring),
2027 DMA_FROM_DEVICE);
2028 }
2029
2030 /* clear contents of buffer_info */
2031 rx_buffer->page = NULL;
2032
2033 return skb;
2034 }
2035
2036 /**
2037 * ixgbe_clean_rx_irq - Clean completed descriptors from Rx ring - bounce buf
2038 * @q_vector: structure containing interrupt and ring information
2039 * @rx_ring: rx descriptor ring to transact packets on
2040 * @budget: Total limit on number of packets to process
2041 *
2042 * This function provides a "bounce buffer" approach to Rx interrupt
2043 * processing. The advantage to this is that on systems that have
2044 * expensive overhead for IOMMU access this provides a means of avoiding
2045 * it by maintaining the mapping of the page to the syste.
2046 *
2047 * Returns amount of work completed
2048 **/
2049 static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
2050 struct ixgbe_ring *rx_ring,
2051 const int budget)
2052 {
2053 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
2054 #ifdef IXGBE_FCOE
2055 struct ixgbe_adapter *adapter = q_vector->adapter;
2056 int ddp_bytes;
2057 unsigned int mss = 0;
2058 #endif /* IXGBE_FCOE */
2059 u16 cleaned_count = ixgbe_desc_unused(rx_ring);
2060
2061 while (likely(total_rx_packets < budget)) {
2062 union ixgbe_adv_rx_desc *rx_desc;
2063 struct sk_buff *skb;
2064
2065 /* return some buffers to hardware, one at a time is too slow */
2066 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
2067 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
2068 cleaned_count = 0;
2069 }
2070
2071 rx_desc = IXGBE_RX_DESC(rx_ring, rx_ring->next_to_clean);
2072
2073 if (!rx_desc->wb.upper.status_error)
2074 break;
2075
2076 /* This memory barrier is needed to keep us from reading
2077 * any other fields out of the rx_desc until we know the
2078 * descriptor has been written back
2079 */
2080 dma_rmb();
2081
2082 /* retrieve a buffer from the ring */
2083 skb = ixgbe_fetch_rx_buffer(rx_ring, rx_desc);
2084
2085 /* exit if we failed to retrieve a buffer */
2086 if (!skb)
2087 break;
2088
2089 cleaned_count++;
2090
2091 /* place incomplete frames back on ring for completion */
2092 if (ixgbe_is_non_eop(rx_ring, rx_desc, skb))
2093 continue;
2094
2095 /* verify the packet layout is correct */
2096 if (ixgbe_cleanup_headers(rx_ring, rx_desc, skb))
2097 continue;
2098
2099 /* probably a little skewed due to removing CRC */
2100 total_rx_bytes += skb->len;
2101
2102 /* populate checksum, timestamp, VLAN, and protocol */
2103 ixgbe_process_skb_fields(rx_ring, rx_desc, skb);
2104
2105 #ifdef IXGBE_FCOE
2106 /* if ddp, not passing to ULD unless for FCP_RSP or error */
2107 if (ixgbe_rx_is_fcoe(rx_ring, rx_desc)) {
2108 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
2109 /* include DDPed FCoE data */
2110 if (ddp_bytes > 0) {
2111 if (!mss) {
2112 mss = rx_ring->netdev->mtu -
2113 sizeof(struct fcoe_hdr) -
2114 sizeof(struct fc_frame_header) -
2115 sizeof(struct fcoe_crc_eof);
2116 if (mss > 512)
2117 mss &= ~511;
2118 }
2119 total_rx_bytes += ddp_bytes;
2120 total_rx_packets += DIV_ROUND_UP(ddp_bytes,
2121 mss);
2122 }
2123 if (!ddp_bytes) {
2124 dev_kfree_skb_any(skb);
2125 continue;
2126 }
2127 }
2128
2129 #endif /* IXGBE_FCOE */
2130 ixgbe_rx_skb(q_vector, skb);
2131
2132 /* update budget accounting */
2133 total_rx_packets++;
2134 }
2135
2136 u64_stats_update_begin(&rx_ring->syncp);
2137 rx_ring->stats.packets += total_rx_packets;
2138 rx_ring->stats.bytes += total_rx_bytes;
2139 u64_stats_update_end(&rx_ring->syncp);
2140 q_vector->rx.total_packets += total_rx_packets;
2141 q_vector->rx.total_bytes += total_rx_bytes;
2142
2143 return total_rx_packets;
2144 }
2145
2146 #ifdef CONFIG_NET_RX_BUSY_POLL
2147 /* must be called with local_bh_disable()d */
2148 static int ixgbe_low_latency_recv(struct napi_struct *napi)
2149 {
2150 struct ixgbe_q_vector *q_vector =
2151 container_of(napi, struct ixgbe_q_vector, napi);
2152 struct ixgbe_adapter *adapter = q_vector->adapter;
2153 struct ixgbe_ring *ring;
2154 int found = 0;
2155
2156 if (test_bit(__IXGBE_DOWN, &adapter->state))
2157 return LL_FLUSH_FAILED;
2158
2159 if (!ixgbe_qv_lock_poll(q_vector))
2160 return LL_FLUSH_BUSY;
2161
2162 ixgbe_for_each_ring(ring, q_vector->rx) {
2163 found = ixgbe_clean_rx_irq(q_vector, ring, 4);
2164 #ifdef BP_EXTENDED_STATS
2165 if (found)
2166 ring->stats.cleaned += found;
2167 else
2168 ring->stats.misses++;
2169 #endif
2170 if (found)
2171 break;
2172 }
2173
2174 ixgbe_qv_unlock_poll(q_vector);
2175
2176 return found;
2177 }
2178 #endif /* CONFIG_NET_RX_BUSY_POLL */
2179
2180 /**
2181 * ixgbe_configure_msix - Configure MSI-X hardware
2182 * @adapter: board private structure
2183 *
2184 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
2185 * interrupts.
2186 **/
2187 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
2188 {
2189 struct ixgbe_q_vector *q_vector;
2190 int v_idx;
2191 u32 mask;
2192
2193 /* Populate MSIX to EITR Select */
2194 if (adapter->num_vfs > 32) {
2195 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
2196 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
2197 }
2198
2199 /*
2200 * Populate the IVAR table and set the ITR values to the
2201 * corresponding register.
2202 */
2203 for (v_idx = 0; v_idx < adapter->num_q_vectors; v_idx++) {
2204 struct ixgbe_ring *ring;
2205 q_vector = adapter->q_vector[v_idx];
2206
2207 ixgbe_for_each_ring(ring, q_vector->rx)
2208 ixgbe_set_ivar(adapter, 0, ring->reg_idx, v_idx);
2209
2210 ixgbe_for_each_ring(ring, q_vector->tx)
2211 ixgbe_set_ivar(adapter, 1, ring->reg_idx, v_idx);
2212
2213 ixgbe_write_eitr(q_vector);
2214 }
2215
2216 switch (adapter->hw.mac.type) {
2217 case ixgbe_mac_82598EB:
2218 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
2219 v_idx);
2220 break;
2221 case ixgbe_mac_82599EB:
2222 case ixgbe_mac_X540:
2223 case ixgbe_mac_X550:
2224 case ixgbe_mac_X550EM_x:
2225 ixgbe_set_ivar(adapter, -1, 1, v_idx);
2226 break;
2227 default:
2228 break;
2229 }
2230 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
2231
2232 /* set up to autoclear timer, and the vectors */
2233 mask = IXGBE_EIMS_ENABLE_MASK;
2234 mask &= ~(IXGBE_EIMS_OTHER |
2235 IXGBE_EIMS_MAILBOX |
2236 IXGBE_EIMS_LSC);
2237
2238 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
2239 }
2240
2241 enum latency_range {
2242 lowest_latency = 0,
2243 low_latency = 1,
2244 bulk_latency = 2,
2245 latency_invalid = 255
2246 };
2247
2248 /**
2249 * ixgbe_update_itr - update the dynamic ITR value based on statistics
2250 * @q_vector: structure containing interrupt and ring information
2251 * @ring_container: structure containing ring performance data
2252 *
2253 * Stores a new ITR value based on packets and byte
2254 * counts during the last interrupt. The advantage of per interrupt
2255 * computation is faster updates and more accurate ITR for the current
2256 * traffic pattern. Constants in this function were computed
2257 * based on theoretical maximum wire speed and thresholds were set based
2258 * on testing data as well as attempting to minimize response time
2259 * while increasing bulk throughput.
2260 * this functionality is controlled by the InterruptThrottleRate module
2261 * parameter (see ixgbe_param.c)
2262 **/
2263 static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
2264 struct ixgbe_ring_container *ring_container)
2265 {
2266 int bytes = ring_container->total_bytes;
2267 int packets = ring_container->total_packets;
2268 u32 timepassed_us;
2269 u64 bytes_perint;
2270 u8 itr_setting = ring_container->itr;
2271
2272 if (packets == 0)
2273 return;
2274
2275 /* simple throttlerate management
2276 * 0-10MB/s lowest (100000 ints/s)
2277 * 10-20MB/s low (20000 ints/s)
2278 * 20-1249MB/s bulk (12000 ints/s)
2279 */
2280 /* what was last interrupt timeslice? */
2281 timepassed_us = q_vector->itr >> 2;
2282 if (timepassed_us == 0)
2283 return;
2284
2285 bytes_perint = bytes / timepassed_us; /* bytes/usec */
2286
2287 switch (itr_setting) {
2288 case lowest_latency:
2289 if (bytes_perint > 10)
2290 itr_setting = low_latency;
2291 break;
2292 case low_latency:
2293 if (bytes_perint > 20)
2294 itr_setting = bulk_latency;
2295 else if (bytes_perint <= 10)
2296 itr_setting = lowest_latency;
2297 break;
2298 case bulk_latency:
2299 if (bytes_perint <= 20)
2300 itr_setting = low_latency;
2301 break;
2302 }
2303
2304 /* clear work counters since we have the values we need */
2305 ring_container->total_bytes = 0;
2306 ring_container->total_packets = 0;
2307
2308 /* write updated itr to ring container */
2309 ring_container->itr = itr_setting;
2310 }
2311
2312 /**
2313 * ixgbe_write_eitr - write EITR register in hardware specific way
2314 * @q_vector: structure containing interrupt and ring information
2315 *
2316 * This function is made to be called by ethtool and by the driver
2317 * when it needs to update EITR registers at runtime. Hardware
2318 * specific quirks/differences are taken care of here.
2319 */
2320 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
2321 {
2322 struct ixgbe_adapter *adapter = q_vector->adapter;
2323 struct ixgbe_hw *hw = &adapter->hw;
2324 int v_idx = q_vector->v_idx;
2325 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
2326
2327 switch (adapter->hw.mac.type) {
2328 case ixgbe_mac_82598EB:
2329 /* must write high and low 16 bits to reset counter */
2330 itr_reg |= (itr_reg << 16);
2331 break;
2332 case ixgbe_mac_82599EB:
2333 case ixgbe_mac_X540:
2334 case ixgbe_mac_X550:
2335 case ixgbe_mac_X550EM_x:
2336 /*
2337 * set the WDIS bit to not clear the timer bits and cause an
2338 * immediate assertion of the interrupt
2339 */
2340 itr_reg |= IXGBE_EITR_CNT_WDIS;
2341 break;
2342 default:
2343 break;
2344 }
2345 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
2346 }
2347
2348 static void ixgbe_set_itr(struct ixgbe_q_vector *q_vector)
2349 {
2350 u32 new_itr = q_vector->itr;
2351 u8 current_itr;
2352
2353 ixgbe_update_itr(q_vector, &q_vector->tx);
2354 ixgbe_update_itr(q_vector, &q_vector->rx);
2355
2356 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
2357
2358 switch (current_itr) {
2359 /* counts and packets in update_itr are dependent on these numbers */
2360 case lowest_latency:
2361 new_itr = IXGBE_100K_ITR;
2362 break;
2363 case low_latency:
2364 new_itr = IXGBE_20K_ITR;
2365 break;
2366 case bulk_latency:
2367 new_itr = IXGBE_12K_ITR;
2368 break;
2369 default:
2370 break;
2371 }
2372
2373 if (new_itr != q_vector->itr) {
2374 /* do an exponential smoothing */
2375 new_itr = (10 * new_itr * q_vector->itr) /
2376 ((9 * new_itr) + q_vector->itr);
2377
2378 /* save the algorithm value here */
2379 q_vector->itr = new_itr;
2380
2381 ixgbe_write_eitr(q_vector);
2382 }
2383 }
2384
2385 /**
2386 * ixgbe_check_overtemp_subtask - check for over temperature
2387 * @adapter: pointer to adapter
2388 **/
2389 static void ixgbe_check_overtemp_subtask(struct ixgbe_adapter *adapter)
2390 {
2391 struct ixgbe_hw *hw = &adapter->hw;
2392 u32 eicr = adapter->interrupt_event;
2393
2394 if (test_bit(__IXGBE_DOWN, &adapter->state))
2395 return;
2396
2397 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
2398 !(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_EVENT))
2399 return;
2400
2401 adapter->flags2 &= ~IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2402
2403 switch (hw->device_id) {
2404 case IXGBE_DEV_ID_82599_T3_LOM:
2405 /*
2406 * Since the warning interrupt is for both ports
2407 * we don't have to check if:
2408 * - This interrupt wasn't for our port.
2409 * - We may have missed the interrupt so always have to
2410 * check if we got a LSC
2411 */
2412 if (!(eicr & IXGBE_EICR_GPI_SDP0_8259X) &&
2413 !(eicr & IXGBE_EICR_LSC))
2414 return;
2415
2416 if (!(eicr & IXGBE_EICR_LSC) && hw->mac.ops.check_link) {
2417 u32 speed;
2418 bool link_up = false;
2419
2420 hw->mac.ops.check_link(hw, &speed, &link_up, false);
2421
2422 if (link_up)
2423 return;
2424 }
2425
2426 /* Check if this is not due to overtemp */
2427 if (hw->phy.ops.check_overtemp(hw) != IXGBE_ERR_OVERTEMP)
2428 return;
2429
2430 break;
2431 default:
2432 if (adapter->hw.mac.type >= ixgbe_mac_X540)
2433 return;
2434 if (!(eicr & IXGBE_EICR_GPI_SDP0(hw)))
2435 return;
2436 break;
2437 }
2438 e_crit(drv, "%s\n", ixgbe_overheat_msg);
2439
2440 adapter->interrupt_event = 0;
2441 }
2442
2443 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
2444 {
2445 struct ixgbe_hw *hw = &adapter->hw;
2446
2447 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
2448 (eicr & IXGBE_EICR_GPI_SDP1(hw))) {
2449 e_crit(probe, "Fan has stopped, replace the adapter\n");
2450 /* write to clear the interrupt */
2451 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1(hw));
2452 }
2453 }
2454
2455 static void ixgbe_check_overtemp_event(struct ixgbe_adapter *adapter, u32 eicr)
2456 {
2457 struct ixgbe_hw *hw = &adapter->hw;
2458
2459 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE))
2460 return;
2461
2462 switch (adapter->hw.mac.type) {
2463 case ixgbe_mac_82599EB:
2464 /*
2465 * Need to check link state so complete overtemp check
2466 * on service task
2467 */
2468 if (((eicr & IXGBE_EICR_GPI_SDP0(hw)) ||
2469 (eicr & IXGBE_EICR_LSC)) &&
2470 (!test_bit(__IXGBE_DOWN, &adapter->state))) {
2471 adapter->interrupt_event = eicr;
2472 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2473 ixgbe_service_event_schedule(adapter);
2474 return;
2475 }
2476 return;
2477 case ixgbe_mac_X540:
2478 if (!(eicr & IXGBE_EICR_TS))
2479 return;
2480 break;
2481 default:
2482 return;
2483 }
2484
2485 e_crit(drv, "%s\n", ixgbe_overheat_msg);
2486 }
2487
2488 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
2489 {
2490 switch (hw->mac.type) {
2491 case ixgbe_mac_82598EB:
2492 if (hw->phy.type == ixgbe_phy_nl)
2493 return true;
2494 return false;
2495 case ixgbe_mac_82599EB:
2496 case ixgbe_mac_X550EM_x:
2497 switch (hw->mac.ops.get_media_type(hw)) {
2498 case ixgbe_media_type_fiber:
2499 case ixgbe_media_type_fiber_qsfp:
2500 return true;
2501 default:
2502 return false;
2503 }
2504 default:
2505 return false;
2506 }
2507 }
2508
2509 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
2510 {
2511 struct ixgbe_hw *hw = &adapter->hw;
2512 u32 eicr_mask = IXGBE_EICR_GPI_SDP2(hw);
2513
2514 if (!ixgbe_is_sfp(hw))
2515 return;
2516
2517 /* Later MAC's use different SDP */
2518 if (hw->mac.type >= ixgbe_mac_X540)
2519 eicr_mask = IXGBE_EICR_GPI_SDP0_X540;
2520
2521 if (eicr & eicr_mask) {
2522 /* Clear the interrupt */
2523 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr_mask);
2524 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2525 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
2526 adapter->sfp_poll_time = 0;
2527 ixgbe_service_event_schedule(adapter);
2528 }
2529 }
2530
2531 if (adapter->hw.mac.type == ixgbe_mac_82599EB &&
2532 (eicr & IXGBE_EICR_GPI_SDP1(hw))) {
2533 /* Clear the interrupt */
2534 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1(hw));
2535 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2536 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
2537 ixgbe_service_event_schedule(adapter);
2538 }
2539 }
2540 }
2541
2542 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
2543 {
2544 struct ixgbe_hw *hw = &adapter->hw;
2545
2546 adapter->lsc_int++;
2547 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2548 adapter->link_check_timeout = jiffies;
2549 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2550 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
2551 IXGBE_WRITE_FLUSH(hw);
2552 ixgbe_service_event_schedule(adapter);
2553 }
2554 }
2555
2556 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
2557 u64 qmask)
2558 {
2559 u32 mask;
2560 struct ixgbe_hw *hw = &adapter->hw;
2561
2562 switch (hw->mac.type) {
2563 case ixgbe_mac_82598EB:
2564 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
2565 IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
2566 break;
2567 case ixgbe_mac_82599EB:
2568 case ixgbe_mac_X540:
2569 case ixgbe_mac_X550:
2570 case ixgbe_mac_X550EM_x:
2571 mask = (qmask & 0xFFFFFFFF);
2572 if (mask)
2573 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
2574 mask = (qmask >> 32);
2575 if (mask)
2576 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
2577 break;
2578 default:
2579 break;
2580 }
2581 /* skip the flush */
2582 }
2583
2584 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
2585 u64 qmask)
2586 {
2587 u32 mask;
2588 struct ixgbe_hw *hw = &adapter->hw;
2589
2590 switch (hw->mac.type) {
2591 case ixgbe_mac_82598EB:
2592 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
2593 IXGBE_WRITE_REG(hw, IXGBE_EIMC, mask);
2594 break;
2595 case ixgbe_mac_82599EB:
2596 case ixgbe_mac_X540:
2597 case ixgbe_mac_X550:
2598 case ixgbe_mac_X550EM_x:
2599 mask = (qmask & 0xFFFFFFFF);
2600 if (mask)
2601 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(0), mask);
2602 mask = (qmask >> 32);
2603 if (mask)
2604 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(1), mask);
2605 break;
2606 default:
2607 break;
2608 }
2609 /* skip the flush */
2610 }
2611
2612 /**
2613 * ixgbe_irq_enable - Enable default interrupt generation settings
2614 * @adapter: board private structure
2615 **/
2616 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
2617 bool flush)
2618 {
2619 struct ixgbe_hw *hw = &adapter->hw;
2620 u32 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
2621
2622 /* don't reenable LSC while waiting for link */
2623 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
2624 mask &= ~IXGBE_EIMS_LSC;
2625
2626 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
2627 switch (adapter->hw.mac.type) {
2628 case ixgbe_mac_82599EB:
2629 mask |= IXGBE_EIMS_GPI_SDP0(hw);
2630 break;
2631 case ixgbe_mac_X540:
2632 case ixgbe_mac_X550:
2633 case ixgbe_mac_X550EM_x:
2634 mask |= IXGBE_EIMS_TS;
2635 break;
2636 default:
2637 break;
2638 }
2639 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
2640 mask |= IXGBE_EIMS_GPI_SDP1(hw);
2641 switch (adapter->hw.mac.type) {
2642 case ixgbe_mac_82599EB:
2643 mask |= IXGBE_EIMS_GPI_SDP1(hw);
2644 mask |= IXGBE_EIMS_GPI_SDP2(hw);
2645 /* fall through */
2646 case ixgbe_mac_X540:
2647 case ixgbe_mac_X550:
2648 case ixgbe_mac_X550EM_x:
2649 if (adapter->hw.device_id == IXGBE_DEV_ID_X550EM_X_SFP)
2650 mask |= IXGBE_EIMS_GPI_SDP0(&adapter->hw);
2651 if (adapter->hw.phy.type == ixgbe_phy_x550em_ext_t)
2652 mask |= IXGBE_EICR_GPI_SDP0_X540;
2653 mask |= IXGBE_EIMS_ECC;
2654 mask |= IXGBE_EIMS_MAILBOX;
2655 break;
2656 default:
2657 break;
2658 }
2659
2660 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
2661 !(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
2662 mask |= IXGBE_EIMS_FLOW_DIR;
2663
2664 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
2665 if (queues)
2666 ixgbe_irq_enable_queues(adapter, ~0);
2667 if (flush)
2668 IXGBE_WRITE_FLUSH(&adapter->hw);
2669 }
2670
2671 static irqreturn_t ixgbe_msix_other(int irq, void *data)
2672 {
2673 struct ixgbe_adapter *adapter = data;
2674 struct ixgbe_hw *hw = &adapter->hw;
2675 u32 eicr;
2676
2677 /*
2678 * Workaround for Silicon errata. Use clear-by-write instead
2679 * of clear-by-read. Reading with EICS will return the
2680 * interrupt causes without clearing, which later be done
2681 * with the write to EICR.
2682 */
2683 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
2684
2685 /* The lower 16bits of the EICR register are for the queue interrupts
2686 * which should be masked here in order to not accidentally clear them if
2687 * the bits are high when ixgbe_msix_other is called. There is a race
2688 * condition otherwise which results in possible performance loss
2689 * especially if the ixgbe_msix_other interrupt is triggering
2690 * consistently (as it would when PPS is turned on for the X540 device)
2691 */
2692 eicr &= 0xFFFF0000;
2693
2694 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
2695
2696 if (eicr & IXGBE_EICR_LSC)
2697 ixgbe_check_lsc(adapter);
2698
2699 if (eicr & IXGBE_EICR_MAILBOX)
2700 ixgbe_msg_task(adapter);
2701
2702 switch (hw->mac.type) {
2703 case ixgbe_mac_82599EB:
2704 case ixgbe_mac_X540:
2705 case ixgbe_mac_X550:
2706 case ixgbe_mac_X550EM_x:
2707 if (hw->phy.type == ixgbe_phy_x550em_ext_t &&
2708 (eicr & IXGBE_EICR_GPI_SDP0_X540)) {
2709 adapter->flags2 |= IXGBE_FLAG2_PHY_INTERRUPT;
2710 ixgbe_service_event_schedule(adapter);
2711 IXGBE_WRITE_REG(hw, IXGBE_EICR,
2712 IXGBE_EICR_GPI_SDP0_X540);
2713 }
2714 if (eicr & IXGBE_EICR_ECC) {
2715 e_info(link, "Received ECC Err, initiating reset\n");
2716 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
2717 ixgbe_service_event_schedule(adapter);
2718 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_ECC);
2719 }
2720 /* Handle Flow Director Full threshold interrupt */
2721 if (eicr & IXGBE_EICR_FLOW_DIR) {
2722 int reinit_count = 0;
2723 int i;
2724 for (i = 0; i < adapter->num_tx_queues; i++) {
2725 struct ixgbe_ring *ring = adapter->tx_ring[i];
2726 if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE,
2727 &ring->state))
2728 reinit_count++;
2729 }
2730 if (reinit_count) {
2731 /* no more flow director interrupts until after init */
2732 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_FLOW_DIR);
2733 adapter->flags2 |= IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
2734 ixgbe_service_event_schedule(adapter);
2735 }
2736 }
2737 ixgbe_check_sfp_event(adapter, eicr);
2738 ixgbe_check_overtemp_event(adapter, eicr);
2739 break;
2740 default:
2741 break;
2742 }
2743
2744 ixgbe_check_fan_failure(adapter, eicr);
2745
2746 if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
2747 ixgbe_ptp_check_pps_event(adapter);
2748
2749 /* re-enable the original interrupt state, no lsc, no queues */
2750 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2751 ixgbe_irq_enable(adapter, false, false);
2752
2753 return IRQ_HANDLED;
2754 }
2755
2756 static irqreturn_t ixgbe_msix_clean_rings(int irq, void *data)
2757 {
2758 struct ixgbe_q_vector *q_vector = data;
2759
2760 /* EIAM disabled interrupts (on this vector) for us */
2761
2762 if (q_vector->rx.ring || q_vector->tx.ring)
2763 napi_schedule_irqoff(&q_vector->napi);
2764
2765 return IRQ_HANDLED;
2766 }
2767
2768 /**
2769 * ixgbe_poll - NAPI Rx polling callback
2770 * @napi: structure for representing this polling device
2771 * @budget: how many packets driver is allowed to clean
2772 *
2773 * This function is used for legacy and MSI, NAPI mode
2774 **/
2775 int ixgbe_poll(struct napi_struct *napi, int budget)
2776 {
2777 struct ixgbe_q_vector *q_vector =
2778 container_of(napi, struct ixgbe_q_vector, napi);
2779 struct ixgbe_adapter *adapter = q_vector->adapter;
2780 struct ixgbe_ring *ring;
2781 int per_ring_budget, work_done = 0;
2782 bool clean_complete = true;
2783
2784 #ifdef CONFIG_IXGBE_DCA
2785 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2786 ixgbe_update_dca(q_vector);
2787 #endif
2788
2789 ixgbe_for_each_ring(ring, q_vector->tx)
2790 clean_complete &= !!ixgbe_clean_tx_irq(q_vector, ring, budget);
2791
2792 /* Exit if we are called by netpoll or busy polling is active */
2793 if ((budget <= 0) || !ixgbe_qv_lock_napi(q_vector))
2794 return budget;
2795
2796 /* attempt to distribute budget to each queue fairly, but don't allow
2797 * the budget to go below 1 because we'll exit polling */
2798 if (q_vector->rx.count > 1)
2799 per_ring_budget = max(budget/q_vector->rx.count, 1);
2800 else
2801 per_ring_budget = budget;
2802
2803 ixgbe_for_each_ring(ring, q_vector->rx) {
2804 int cleaned = ixgbe_clean_rx_irq(q_vector, ring,
2805 per_ring_budget);
2806
2807 work_done += cleaned;
2808 clean_complete &= (cleaned < per_ring_budget);
2809 }
2810
2811 ixgbe_qv_unlock_napi(q_vector);
2812 /* If all work not completed, return budget and keep polling */
2813 if (!clean_complete)
2814 return budget;
2815
2816 /* all work done, exit the polling mode */
2817 napi_complete_done(napi, work_done);
2818 if (adapter->rx_itr_setting & 1)
2819 ixgbe_set_itr(q_vector);
2820 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2821 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
2822
2823 return 0;
2824 }
2825
2826 /**
2827 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2828 * @adapter: board private structure
2829 *
2830 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2831 * interrupts from the kernel.
2832 **/
2833 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2834 {
2835 struct net_device *netdev = adapter->netdev;
2836 int vector, err;
2837 int ri = 0, ti = 0;
2838
2839 for (vector = 0; vector < adapter->num_q_vectors; vector++) {
2840 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
2841 struct msix_entry *entry = &adapter->msix_entries[vector];
2842
2843 if (q_vector->tx.ring && q_vector->rx.ring) {
2844 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2845 "%s-%s-%d", netdev->name, "TxRx", ri++);
2846 ti++;
2847 } else if (q_vector->rx.ring) {
2848 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2849 "%s-%s-%d", netdev->name, "rx", ri++);
2850 } else if (q_vector->tx.ring) {
2851 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2852 "%s-%s-%d", netdev->name, "tx", ti++);
2853 } else {
2854 /* skip this unused q_vector */
2855 continue;
2856 }
2857 err = request_irq(entry->vector, &ixgbe_msix_clean_rings, 0,
2858 q_vector->name, q_vector);
2859 if (err) {
2860 e_err(probe, "request_irq failed for MSIX interrupt "
2861 "Error: %d\n", err);
2862 goto free_queue_irqs;
2863 }
2864 /* If Flow Director is enabled, set interrupt affinity */
2865 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2866 /* assign the mask for this irq */
2867 irq_set_affinity_hint(entry->vector,
2868 &q_vector->affinity_mask);
2869 }
2870 }
2871
2872 err = request_irq(adapter->msix_entries[vector].vector,
2873 ixgbe_msix_other, 0, netdev->name, adapter);
2874 if (err) {
2875 e_err(probe, "request_irq for msix_other failed: %d\n", err);
2876 goto free_queue_irqs;
2877 }
2878
2879 return 0;
2880
2881 free_queue_irqs:
2882 while (vector) {
2883 vector--;
2884 irq_set_affinity_hint(adapter->msix_entries[vector].vector,
2885 NULL);
2886 free_irq(adapter->msix_entries[vector].vector,
2887 adapter->q_vector[vector]);
2888 }
2889 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2890 pci_disable_msix(adapter->pdev);
2891 kfree(adapter->msix_entries);
2892 adapter->msix_entries = NULL;
2893 return err;
2894 }
2895
2896 /**
2897 * ixgbe_intr - legacy mode Interrupt Handler
2898 * @irq: interrupt number
2899 * @data: pointer to a network interface device structure
2900 **/
2901 static irqreturn_t ixgbe_intr(int irq, void *data)
2902 {
2903 struct ixgbe_adapter *adapter = data;
2904 struct ixgbe_hw *hw = &adapter->hw;
2905 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2906 u32 eicr;
2907
2908 /*
2909 * Workaround for silicon errata #26 on 82598. Mask the interrupt
2910 * before the read of EICR.
2911 */
2912 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2913
2914 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2915 * therefore no explicit interrupt disable is necessary */
2916 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2917 if (!eicr) {
2918 /*
2919 * shared interrupt alert!
2920 * make sure interrupts are enabled because the read will
2921 * have disabled interrupts due to EIAM
2922 * finish the workaround of silicon errata on 82598. Unmask
2923 * the interrupt that we masked before the EICR read.
2924 */
2925 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2926 ixgbe_irq_enable(adapter, true, true);
2927 return IRQ_NONE; /* Not our interrupt */
2928 }
2929
2930 if (eicr & IXGBE_EICR_LSC)
2931 ixgbe_check_lsc(adapter);
2932
2933 switch (hw->mac.type) {
2934 case ixgbe_mac_82599EB:
2935 ixgbe_check_sfp_event(adapter, eicr);
2936 /* Fall through */
2937 case ixgbe_mac_X540:
2938 case ixgbe_mac_X550:
2939 case ixgbe_mac_X550EM_x:
2940 if (eicr & IXGBE_EICR_ECC) {
2941 e_info(link, "Received ECC Err, initiating reset\n");
2942 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
2943 ixgbe_service_event_schedule(adapter);
2944 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_ECC);
2945 }
2946 ixgbe_check_overtemp_event(adapter, eicr);
2947 break;
2948 default:
2949 break;
2950 }
2951
2952 ixgbe_check_fan_failure(adapter, eicr);
2953 if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
2954 ixgbe_ptp_check_pps_event(adapter);
2955
2956 /* would disable interrupts here but EIAM disabled it */
2957 napi_schedule_irqoff(&q_vector->napi);
2958
2959 /*
2960 * re-enable link(maybe) and non-queue interrupts, no flush.
2961 * ixgbe_poll will re-enable the queue interrupts
2962 */
2963 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2964 ixgbe_irq_enable(adapter, false, false);
2965
2966 return IRQ_HANDLED;
2967 }
2968
2969 /**
2970 * ixgbe_request_irq - initialize interrupts
2971 * @adapter: board private structure
2972 *
2973 * Attempts to configure interrupts using the best available
2974 * capabilities of the hardware and kernel.
2975 **/
2976 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
2977 {
2978 struct net_device *netdev = adapter->netdev;
2979 int err;
2980
2981 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2982 err = ixgbe_request_msix_irqs(adapter);
2983 else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED)
2984 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
2985 netdev->name, adapter);
2986 else
2987 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
2988 netdev->name, adapter);
2989
2990 if (err)
2991 e_err(probe, "request_irq failed, Error %d\n", err);
2992
2993 return err;
2994 }
2995
2996 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
2997 {
2998 int vector;
2999
3000 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
3001 free_irq(adapter->pdev->irq, adapter);
3002 return;
3003 }
3004
3005 for (vector = 0; vector < adapter->num_q_vectors; vector++) {
3006 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
3007 struct msix_entry *entry = &adapter->msix_entries[vector];
3008
3009 /* free only the irqs that were actually requested */
3010 if (!q_vector->rx.ring && !q_vector->tx.ring)
3011 continue;
3012
3013 /* clear the affinity_mask in the IRQ descriptor */
3014 irq_set_affinity_hint(entry->vector, NULL);
3015
3016 free_irq(entry->vector, q_vector);
3017 }
3018
3019 free_irq(adapter->msix_entries[vector++].vector, adapter);
3020 }
3021
3022 /**
3023 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
3024 * @adapter: board private structure
3025 **/
3026 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
3027 {
3028 switch (adapter->hw.mac.type) {
3029 case ixgbe_mac_82598EB:
3030 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
3031 break;
3032 case ixgbe_mac_82599EB:
3033 case ixgbe_mac_X540:
3034 case ixgbe_mac_X550:
3035 case ixgbe_mac_X550EM_x:
3036 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
3037 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
3038 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
3039 break;
3040 default:
3041 break;
3042 }
3043 IXGBE_WRITE_FLUSH(&adapter->hw);
3044 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3045 int vector;
3046
3047 for (vector = 0; vector < adapter->num_q_vectors; vector++)
3048 synchronize_irq(adapter->msix_entries[vector].vector);
3049
3050 synchronize_irq(adapter->msix_entries[vector++].vector);
3051 } else {
3052 synchronize_irq(adapter->pdev->irq);
3053 }
3054 }
3055
3056 /**
3057 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
3058 *
3059 **/
3060 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
3061 {
3062 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
3063
3064 ixgbe_write_eitr(q_vector);
3065
3066 ixgbe_set_ivar(adapter, 0, 0, 0);
3067 ixgbe_set_ivar(adapter, 1, 0, 0);
3068
3069 e_info(hw, "Legacy interrupt IVAR setup done\n");
3070 }
3071
3072 /**
3073 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
3074 * @adapter: board private structure
3075 * @ring: structure containing ring specific data
3076 *
3077 * Configure the Tx descriptor ring after a reset.
3078 **/
3079 void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
3080 struct ixgbe_ring *ring)
3081 {
3082 struct ixgbe_hw *hw = &adapter->hw;
3083 u64 tdba = ring->dma;
3084 int wait_loop = 10;
3085 u32 txdctl = IXGBE_TXDCTL_ENABLE;
3086 u8 reg_idx = ring->reg_idx;
3087
3088 /* disable queue to avoid issues while updating state */
3089 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), 0);
3090 IXGBE_WRITE_FLUSH(hw);
3091
3092 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
3093 (tdba & DMA_BIT_MASK(32)));
3094 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
3095 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
3096 ring->count * sizeof(union ixgbe_adv_tx_desc));
3097 IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
3098 IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
3099 ring->tail = adapter->io_addr + IXGBE_TDT(reg_idx);
3100
3101 /*
3102 * set WTHRESH to encourage burst writeback, it should not be set
3103 * higher than 1 when:
3104 * - ITR is 0 as it could cause false TX hangs
3105 * - ITR is set to > 100k int/sec and BQL is enabled
3106 *
3107 * In order to avoid issues WTHRESH + PTHRESH should always be equal
3108 * to or less than the number of on chip descriptors, which is
3109 * currently 40.
3110 */
3111 if (!ring->q_vector || (ring->q_vector->itr < IXGBE_100K_ITR))
3112 txdctl |= (1 << 16); /* WTHRESH = 1 */
3113 else
3114 txdctl |= (8 << 16); /* WTHRESH = 8 */
3115
3116 /*
3117 * Setting PTHRESH to 32 both improves performance
3118 * and avoids a TX hang with DFP enabled
3119 */
3120 txdctl |= (1 << 8) | /* HTHRESH = 1 */
3121 32; /* PTHRESH = 32 */
3122
3123 /* reinitialize flowdirector state */
3124 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3125 ring->atr_sample_rate = adapter->atr_sample_rate;
3126 ring->atr_count = 0;
3127 set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state);
3128 } else {
3129 ring->atr_sample_rate = 0;
3130 }
3131
3132 /* initialize XPS */
3133 if (!test_and_set_bit(__IXGBE_TX_XPS_INIT_DONE, &ring->state)) {
3134 struct ixgbe_q_vector *q_vector = ring->q_vector;
3135
3136 if (q_vector)
3137 netif_set_xps_queue(ring->netdev,
3138 &q_vector->affinity_mask,
3139 ring->queue_index);
3140 }
3141
3142 clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state);
3143
3144 /* enable queue */
3145 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
3146
3147 /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
3148 if (hw->mac.type == ixgbe_mac_82598EB &&
3149 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3150 return;
3151
3152 /* poll to verify queue is enabled */
3153 do {
3154 usleep_range(1000, 2000);
3155 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
3156 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
3157 if (!wait_loop)
3158 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx);
3159 }
3160
3161 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
3162 {
3163 struct ixgbe_hw *hw = &adapter->hw;
3164 u32 rttdcs, mtqc;
3165 u8 tcs = netdev_get_num_tc(adapter->netdev);
3166
3167 if (hw->mac.type == ixgbe_mac_82598EB)
3168 return;
3169
3170 /* disable the arbiter while setting MTQC */
3171 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
3172 rttdcs |= IXGBE_RTTDCS_ARBDIS;
3173 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
3174
3175 /* set transmit pool layout */
3176 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3177 mtqc = IXGBE_MTQC_VT_ENA;
3178 if (tcs > 4)
3179 mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
3180 else if (tcs > 1)
3181 mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
3182 else if (adapter->ring_feature[RING_F_RSS].indices == 4)
3183 mtqc |= IXGBE_MTQC_32VF;
3184 else
3185 mtqc |= IXGBE_MTQC_64VF;
3186 } else {
3187 if (tcs > 4)
3188 mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
3189 else if (tcs > 1)
3190 mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
3191 else
3192 mtqc = IXGBE_MTQC_64Q_1PB;
3193 }
3194
3195 IXGBE_WRITE_REG(hw, IXGBE_MTQC, mtqc);
3196
3197 /* Enable Security TX Buffer IFG for multiple pb */
3198 if (tcs) {
3199 u32 sectx = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);
3200 sectx |= IXGBE_SECTX_DCB;
3201 IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, sectx);
3202 }
3203
3204 /* re-enable the arbiter */
3205 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
3206 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
3207 }
3208
3209 /**
3210 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
3211 * @adapter: board private structure
3212 *
3213 * Configure the Tx unit of the MAC after a reset.
3214 **/
3215 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
3216 {
3217 struct ixgbe_hw *hw = &adapter->hw;
3218 u32 dmatxctl;
3219 u32 i;
3220
3221 ixgbe_setup_mtqc(adapter);
3222
3223 if (hw->mac.type != ixgbe_mac_82598EB) {
3224 /* DMATXCTL.EN must be before Tx queues are enabled */
3225 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
3226 dmatxctl |= IXGBE_DMATXCTL_TE;
3227 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
3228 }
3229
3230 /* Setup the HW Tx Head and Tail descriptor pointers */
3231 for (i = 0; i < adapter->num_tx_queues; i++)
3232 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
3233 }
3234
3235 static void ixgbe_enable_rx_drop(struct ixgbe_adapter *adapter,
3236 struct ixgbe_ring *ring)
3237 {
3238 struct ixgbe_hw *hw = &adapter->hw;
3239 u8 reg_idx = ring->reg_idx;
3240 u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
3241
3242 srrctl |= IXGBE_SRRCTL_DROP_EN;
3243
3244 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3245 }
3246
3247 static void ixgbe_disable_rx_drop(struct ixgbe_adapter *adapter,
3248 struct ixgbe_ring *ring)
3249 {
3250 struct ixgbe_hw *hw = &adapter->hw;
3251 u8 reg_idx = ring->reg_idx;
3252 u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
3253
3254 srrctl &= ~IXGBE_SRRCTL_DROP_EN;
3255
3256 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3257 }
3258
3259 #ifdef CONFIG_IXGBE_DCB
3260 void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
3261 #else
3262 static void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
3263 #endif
3264 {
3265 int i;
3266 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
3267
3268 if (adapter->ixgbe_ieee_pfc)
3269 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
3270
3271 /*
3272 * We should set the drop enable bit if:
3273 * SR-IOV is enabled
3274 * or
3275 * Number of Rx queues > 1 and flow control is disabled
3276 *
3277 * This allows us to avoid head of line blocking for security
3278 * and performance reasons.
3279 */
3280 if (adapter->num_vfs || (adapter->num_rx_queues > 1 &&
3281 !(adapter->hw.fc.current_mode & ixgbe_fc_tx_pause) && !pfc_en)) {
3282 for (i = 0; i < adapter->num_rx_queues; i++)
3283 ixgbe_enable_rx_drop(adapter, adapter->rx_ring[i]);
3284 } else {
3285 for (i = 0; i < adapter->num_rx_queues; i++)
3286 ixgbe_disable_rx_drop(adapter, adapter->rx_ring[i]);
3287 }
3288 }
3289
3290 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
3291
3292 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
3293 struct ixgbe_ring *rx_ring)
3294 {
3295 struct ixgbe_hw *hw = &adapter->hw;
3296 u32 srrctl;
3297 u8 reg_idx = rx_ring->reg_idx;
3298
3299 if (hw->mac.type == ixgbe_mac_82598EB) {
3300 u16 mask = adapter->ring_feature[RING_F_RSS].mask;
3301
3302 /*
3303 * if VMDq is not active we must program one srrctl register
3304 * per RSS queue since we have enabled RDRXCTL.MVMEN
3305 */
3306 reg_idx &= mask;
3307 }
3308
3309 /* configure header buffer length, needed for RSC */
3310 srrctl = IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;
3311
3312 /* configure the packet buffer length */
3313 srrctl |= ixgbe_rx_bufsz(rx_ring) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
3314
3315 /* configure descriptor type */
3316 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
3317
3318 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3319 }
3320
3321 /**
3322 * ixgbe_rss_indir_tbl_entries - Return RSS indirection table entries
3323 * @adapter: device handle
3324 *
3325 * - 82598/82599/X540: 128
3326 * - X550(non-SRIOV mode): 512
3327 * - X550(SRIOV mode): 64
3328 */
3329 u32 ixgbe_rss_indir_tbl_entries(struct ixgbe_adapter *adapter)
3330 {
3331 if (adapter->hw.mac.type < ixgbe_mac_X550)
3332 return 128;
3333 else if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3334 return 64;
3335 else
3336 return 512;
3337 }
3338
3339 /**
3340 * ixgbe_store_reta - Write the RETA table to HW
3341 * @adapter: device handle
3342 *
3343 * Write the RSS redirection table stored in adapter.rss_indir_tbl[] to HW.
3344 */
3345 void ixgbe_store_reta(struct ixgbe_adapter *adapter)
3346 {
3347 u32 i, reta_entries = ixgbe_rss_indir_tbl_entries(adapter);
3348 struct ixgbe_hw *hw = &adapter->hw;
3349 u32 reta = 0;
3350 u32 indices_multi;
3351 u8 *indir_tbl = adapter->rss_indir_tbl;
3352
3353 /* Fill out the redirection table as follows:
3354 * - 82598: 8 bit wide entries containing pair of 4 bit RSS
3355 * indices.
3356 * - 82599/X540: 8 bit wide entries containing 4 bit RSS index
3357 * - X550: 8 bit wide entries containing 6 bit RSS index
3358 */
3359 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
3360 indices_multi = 0x11;
3361 else
3362 indices_multi = 0x1;
3363
3364 /* Write redirection table to HW */
3365 for (i = 0; i < reta_entries; i++) {
3366 reta |= indices_multi * indir_tbl[i] << (i & 0x3) * 8;
3367 if ((i & 3) == 3) {
3368 if (i < 128)
3369 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
3370 else
3371 IXGBE_WRITE_REG(hw, IXGBE_ERETA((i >> 2) - 32),
3372 reta);
3373 reta = 0;
3374 }
3375 }
3376 }
3377
3378 /**
3379 * ixgbe_store_vfreta - Write the RETA table to HW (x550 devices in SRIOV mode)
3380 * @adapter: device handle
3381 *
3382 * Write the RSS redirection table stored in adapter.rss_indir_tbl[] to HW.
3383 */
3384 static void ixgbe_store_vfreta(struct ixgbe_adapter *adapter)
3385 {
3386 u32 i, reta_entries = ixgbe_rss_indir_tbl_entries(adapter);
3387 struct ixgbe_hw *hw = &adapter->hw;
3388 u32 vfreta = 0;
3389 unsigned int pf_pool = adapter->num_vfs;
3390
3391 /* Write redirection table to HW */
3392 for (i = 0; i < reta_entries; i++) {
3393 vfreta |= (u32)adapter->rss_indir_tbl[i] << (i & 0x3) * 8;
3394 if ((i & 3) == 3) {
3395 IXGBE_WRITE_REG(hw, IXGBE_PFVFRETA(i >> 2, pf_pool),
3396 vfreta);
3397 vfreta = 0;
3398 }
3399 }
3400 }
3401
3402 static void ixgbe_setup_reta(struct ixgbe_adapter *adapter)
3403 {
3404 struct ixgbe_hw *hw = &adapter->hw;
3405 u32 i, j;
3406 u32 reta_entries = ixgbe_rss_indir_tbl_entries(adapter);
3407 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;
3408
3409 /* Program table for at least 2 queues w/ SR-IOV so that VFs can
3410 * make full use of any rings they may have. We will use the
3411 * PSRTYPE register to control how many rings we use within the PF.
3412 */
3413 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) && (rss_i < 2))
3414 rss_i = 2;
3415
3416 /* Fill out hash function seeds */
3417 for (i = 0; i < 10; i++)
3418 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), adapter->rss_key[i]);
3419
3420 /* Fill out redirection table */
3421 memset(adapter->rss_indir_tbl, 0, sizeof(adapter->rss_indir_tbl));
3422
3423 for (i = 0, j = 0; i < reta_entries; i++, j++) {
3424 if (j == rss_i)
3425 j = 0;
3426
3427 adapter->rss_indir_tbl[i] = j;
3428 }
3429
3430 ixgbe_store_reta(adapter);
3431 }
3432
3433 static void ixgbe_setup_vfreta(struct ixgbe_adapter *adapter)
3434 {
3435 struct ixgbe_hw *hw = &adapter->hw;
3436 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;
3437 unsigned int pf_pool = adapter->num_vfs;
3438 int i, j;
3439
3440 /* Fill out hash function seeds */
3441 for (i = 0; i < 10; i++)
3442 IXGBE_WRITE_REG(hw, IXGBE_PFVFRSSRK(i, pf_pool),
3443 adapter->rss_key[i]);
3444
3445 /* Fill out the redirection table */
3446 for (i = 0, j = 0; i < 64; i++, j++) {
3447 if (j == rss_i)
3448 j = 0;
3449
3450 adapter->rss_indir_tbl[i] = j;
3451 }
3452
3453 ixgbe_store_vfreta(adapter);
3454 }
3455
3456 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
3457 {
3458 struct ixgbe_hw *hw = &adapter->hw;
3459 u32 mrqc = 0, rss_field = 0, vfmrqc = 0;
3460 u32 rxcsum;
3461
3462 /* Disable indicating checksum in descriptor, enables RSS hash */
3463 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
3464 rxcsum |= IXGBE_RXCSUM_PCSD;
3465 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
3466
3467 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
3468 if (adapter->ring_feature[RING_F_RSS].mask)
3469 mrqc = IXGBE_MRQC_RSSEN;
3470 } else {
3471 u8 tcs = netdev_get_num_tc(adapter->netdev);
3472
3473 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3474 if (tcs > 4)
3475 mrqc = IXGBE_MRQC_VMDQRT8TCEN; /* 8 TCs */
3476 else if (tcs > 1)
3477 mrqc = IXGBE_MRQC_VMDQRT4TCEN; /* 4 TCs */
3478 else if (adapter->ring_feature[RING_F_RSS].indices == 4)
3479 mrqc = IXGBE_MRQC_VMDQRSS32EN;
3480 else
3481 mrqc = IXGBE_MRQC_VMDQRSS64EN;
3482 } else {
3483 if (tcs > 4)
3484 mrqc = IXGBE_MRQC_RTRSS8TCEN;
3485 else if (tcs > 1)
3486 mrqc = IXGBE_MRQC_RTRSS4TCEN;
3487 else
3488 mrqc = IXGBE_MRQC_RSSEN;
3489 }
3490 }
3491
3492 /* Perform hash on these packet types */
3493 rss_field |= IXGBE_MRQC_RSS_FIELD_IPV4 |
3494 IXGBE_MRQC_RSS_FIELD_IPV4_TCP |
3495 IXGBE_MRQC_RSS_FIELD_IPV6 |
3496 IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
3497
3498 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV4_UDP)
3499 rss_field |= IXGBE_MRQC_RSS_FIELD_IPV4_UDP;
3500 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV6_UDP)
3501 rss_field |= IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
3502
3503 netdev_rss_key_fill(adapter->rss_key, sizeof(adapter->rss_key));
3504 if ((hw->mac.type >= ixgbe_mac_X550) &&
3505 (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) {
3506 unsigned int pf_pool = adapter->num_vfs;
3507
3508 /* Enable VF RSS mode */
3509 mrqc |= IXGBE_MRQC_MULTIPLE_RSS;
3510 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
3511
3512 /* Setup RSS through the VF registers */
3513 ixgbe_setup_vfreta(adapter);
3514 vfmrqc = IXGBE_MRQC_RSSEN;
3515 vfmrqc |= rss_field;
3516 IXGBE_WRITE_REG(hw, IXGBE_PFVFMRQC(pf_pool), vfmrqc);
3517 } else {
3518 ixgbe_setup_reta(adapter);
3519 mrqc |= rss_field;
3520 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
3521 }
3522 }
3523
3524 /**
3525 * ixgbe_configure_rscctl - enable RSC for the indicated ring
3526 * @adapter: address of board private structure
3527 * @index: index of ring to set
3528 **/
3529 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
3530 struct ixgbe_ring *ring)
3531 {
3532 struct ixgbe_hw *hw = &adapter->hw;
3533 u32 rscctrl;
3534 u8 reg_idx = ring->reg_idx;
3535
3536 if (!ring_is_rsc_enabled(ring))
3537 return;
3538
3539 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
3540 rscctrl |= IXGBE_RSCCTL_RSCEN;
3541 /*
3542 * we must limit the number of descriptors so that the
3543 * total size of max desc * buf_len is not greater
3544 * than 65536
3545 */
3546 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
3547 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
3548 }
3549
3550 #define IXGBE_MAX_RX_DESC_POLL 10
3551 static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
3552 struct ixgbe_ring *ring)
3553 {
3554 struct ixgbe_hw *hw = &adapter->hw;
3555 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3556 u32 rxdctl;
3557 u8 reg_idx = ring->reg_idx;
3558
3559 if (ixgbe_removed(hw->hw_addr))
3560 return;
3561 /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
3562 if (hw->mac.type == ixgbe_mac_82598EB &&
3563 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3564 return;
3565
3566 do {
3567 usleep_range(1000, 2000);
3568 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3569 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
3570
3571 if (!wait_loop) {
3572 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
3573 "the polling period\n", reg_idx);
3574 }
3575 }
3576
3577 void ixgbe_disable_rx_queue(struct ixgbe_adapter *adapter,
3578 struct ixgbe_ring *ring)
3579 {
3580 struct ixgbe_hw *hw = &adapter->hw;
3581 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3582 u32 rxdctl;
3583 u8 reg_idx = ring->reg_idx;
3584
3585 if (ixgbe_removed(hw->hw_addr))
3586 return;
3587 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3588 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
3589
3590 /* write value back with RXDCTL.ENABLE bit cleared */
3591 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3592
3593 if (hw->mac.type == ixgbe_mac_82598EB &&
3594 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3595 return;
3596
3597 /* the hardware may take up to 100us to really disable the rx queue */
3598 do {
3599 udelay(10);
3600 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3601 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
3602
3603 if (!wait_loop) {
3604 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not cleared within "
3605 "the polling period\n", reg_idx);
3606 }
3607 }
3608
3609 void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
3610 struct ixgbe_ring *ring)
3611 {
3612 struct ixgbe_hw *hw = &adapter->hw;
3613 u64 rdba = ring->dma;
3614 u32 rxdctl;
3615 u8 reg_idx = ring->reg_idx;
3616
3617 /* disable queue to avoid issues while updating state */
3618 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3619 ixgbe_disable_rx_queue(adapter, ring);
3620
3621 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
3622 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
3623 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
3624 ring->count * sizeof(union ixgbe_adv_rx_desc));
3625 /* Force flushing of IXGBE_RDLEN to prevent MDD */
3626 IXGBE_WRITE_FLUSH(hw);
3627
3628 IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
3629 IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
3630 ring->tail = adapter->io_addr + IXGBE_RDT(reg_idx);
3631
3632 ixgbe_configure_srrctl(adapter, ring);
3633 ixgbe_configure_rscctl(adapter, ring);
3634
3635 if (hw->mac.type == ixgbe_mac_82598EB) {
3636 /*
3637 * enable cache line friendly hardware writes:
3638 * PTHRESH=32 descriptors (half the internal cache),
3639 * this also removes ugly rx_no_buffer_count increment
3640 * HTHRESH=4 descriptors (to minimize latency on fetch)
3641 * WTHRESH=8 burst writeback up to two cache lines
3642 */
3643 rxdctl &= ~0x3FFFFF;
3644 rxdctl |= 0x080420;
3645 }
3646
3647 /* enable receive descriptor ring */
3648 rxdctl |= IXGBE_RXDCTL_ENABLE;
3649 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3650
3651 ixgbe_rx_desc_queue_enable(adapter, ring);
3652 ixgbe_alloc_rx_buffers(ring, ixgbe_desc_unused(ring));
3653 }
3654
3655 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
3656 {
3657 struct ixgbe_hw *hw = &adapter->hw;
3658 int rss_i = adapter->ring_feature[RING_F_RSS].indices;
3659 u16 pool;
3660
3661 /* PSRTYPE must be initialized in non 82598 adapters */
3662 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
3663 IXGBE_PSRTYPE_UDPHDR |
3664 IXGBE_PSRTYPE_IPV4HDR |
3665 IXGBE_PSRTYPE_L2HDR |
3666 IXGBE_PSRTYPE_IPV6HDR;
3667
3668 if (hw->mac.type == ixgbe_mac_82598EB)
3669 return;
3670
3671 if (rss_i > 3)
3672 psrtype |= 2 << 29;
3673 else if (rss_i > 1)
3674 psrtype |= 1 << 29;
3675
3676 for_each_set_bit(pool, &adapter->fwd_bitmask, 32)
3677 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(VMDQ_P(pool)), psrtype);
3678 }
3679
3680 static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
3681 {
3682 struct ixgbe_hw *hw = &adapter->hw;
3683 u32 reg_offset, vf_shift;
3684 u32 gcr_ext, vmdctl;
3685 int i;
3686
3687 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
3688 return;
3689
3690 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
3691 vmdctl |= IXGBE_VMD_CTL_VMDQ_EN;
3692 vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
3693 vmdctl |= VMDQ_P(0) << IXGBE_VT_CTL_POOL_SHIFT;
3694 vmdctl |= IXGBE_VT_CTL_REPLEN;
3695 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
3696
3697 vf_shift = VMDQ_P(0) % 32;
3698 reg_offset = (VMDQ_P(0) >= 32) ? 1 : 0;
3699
3700 /* Enable only the PF's pool for Tx/Rx */
3701 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (~0) << vf_shift);
3702 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), reg_offset - 1);
3703 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (~0) << vf_shift);
3704 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), reg_offset - 1);
3705 if (adapter->bridge_mode == BRIDGE_MODE_VEB)
3706 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
3707
3708 /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
3709 hw->mac.ops.set_vmdq(hw, 0, VMDQ_P(0));
3710
3711 /* clear VLAN promisc flag so VFTA will be updated if necessary */
3712 adapter->flags2 &= ~IXGBE_FLAG2_VLAN_PROMISC;
3713
3714 /*
3715 * Set up VF register offsets for selected VT Mode,
3716 * i.e. 32 or 64 VFs for SR-IOV
3717 */
3718 switch (adapter->ring_feature[RING_F_VMDQ].mask) {
3719 case IXGBE_82599_VMDQ_8Q_MASK:
3720 gcr_ext = IXGBE_GCR_EXT_VT_MODE_16;
3721 break;
3722 case IXGBE_82599_VMDQ_4Q_MASK:
3723 gcr_ext = IXGBE_GCR_EXT_VT_MODE_32;
3724 break;
3725 default:
3726 gcr_ext = IXGBE_GCR_EXT_VT_MODE_64;
3727 break;
3728 }
3729
3730 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
3731
3732
3733 /* Enable MAC Anti-Spoofing */
3734 hw->mac.ops.set_mac_anti_spoofing(hw, (adapter->num_vfs != 0),
3735 adapter->num_vfs);
3736
3737 /* Ensure LLDP and FC is set for Ethertype Antispoofing if we will be
3738 * calling set_ethertype_anti_spoofing for each VF in loop below
3739 */
3740 if (hw->mac.ops.set_ethertype_anti_spoofing) {
3741 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_LLDP),
3742 (IXGBE_ETQF_FILTER_EN |
3743 IXGBE_ETQF_TX_ANTISPOOF |
3744 IXGBE_ETH_P_LLDP));
3745
3746 IXGBE_WRITE_REG(hw, IXGBE_ETQF(IXGBE_ETQF_FILTER_FC),
3747 (IXGBE_ETQF_FILTER_EN |
3748 IXGBE_ETQF_TX_ANTISPOOF |
3749 ETH_P_PAUSE));
3750 }
3751
3752 /* For VFs that have spoof checking turned off */
3753 for (i = 0; i < adapter->num_vfs; i++) {
3754 if (!adapter->vfinfo[i].spoofchk_enabled)
3755 ixgbe_ndo_set_vf_spoofchk(adapter->netdev, i, false);
3756
3757 /* enable ethertype anti spoofing if hw supports it */
3758 if (hw->mac.ops.set_ethertype_anti_spoofing)
3759 hw->mac.ops.set_ethertype_anti_spoofing(hw, true, i);
3760
3761 /* Enable/Disable RSS query feature */
3762 ixgbe_ndo_set_vf_rss_query_en(adapter->netdev, i,
3763 adapter->vfinfo[i].rss_query_enabled);
3764 }
3765 }
3766
3767 static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
3768 {
3769 struct ixgbe_hw *hw = &adapter->hw;
3770 struct net_device *netdev = adapter->netdev;
3771 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3772 struct ixgbe_ring *rx_ring;
3773 int i;
3774 u32 mhadd, hlreg0;
3775
3776 #ifdef IXGBE_FCOE
3777 /* adjust max frame to be able to do baby jumbo for FCoE */
3778 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
3779 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
3780 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
3781
3782 #endif /* IXGBE_FCOE */
3783
3784 /* adjust max frame to be at least the size of a standard frame */
3785 if (max_frame < (ETH_FRAME_LEN + ETH_FCS_LEN))
3786 max_frame = (ETH_FRAME_LEN + ETH_FCS_LEN);
3787
3788 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
3789 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
3790 mhadd &= ~IXGBE_MHADD_MFS_MASK;
3791 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
3792
3793 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
3794 }
3795
3796 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
3797 /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
3798 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
3799 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
3800
3801 /*
3802 * Setup the HW Rx Head and Tail Descriptor Pointers and
3803 * the Base and Length of the Rx Descriptor Ring
3804 */
3805 for (i = 0; i < adapter->num_rx_queues; i++) {
3806 rx_ring = adapter->rx_ring[i];
3807 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
3808 set_ring_rsc_enabled(rx_ring);
3809 else
3810 clear_ring_rsc_enabled(rx_ring);
3811 }
3812 }
3813
3814 static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
3815 {
3816 struct ixgbe_hw *hw = &adapter->hw;
3817 u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
3818
3819 switch (hw->mac.type) {
3820 case ixgbe_mac_82598EB:
3821 /*
3822 * For VMDq support of different descriptor types or
3823 * buffer sizes through the use of multiple SRRCTL
3824 * registers, RDRXCTL.MVMEN must be set to 1
3825 *
3826 * also, the manual doesn't mention it clearly but DCA hints
3827 * will only use queue 0's tags unless this bit is set. Side
3828 * effects of setting this bit are only that SRRCTL must be
3829 * fully programmed [0..15]
3830 */
3831 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
3832 break;
3833 case ixgbe_mac_X550:
3834 case ixgbe_mac_X550EM_x:
3835 if (adapter->num_vfs)
3836 rdrxctl |= IXGBE_RDRXCTL_PSP;
3837 /* fall through for older HW */
3838 case ixgbe_mac_82599EB:
3839 case ixgbe_mac_X540:
3840 /* Disable RSC for ACK packets */
3841 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
3842 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
3843 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
3844 /* hardware requires some bits to be set by default */
3845 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
3846 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
3847 break;
3848 default:
3849 /* We should do nothing since we don't know this hardware */
3850 return;
3851 }
3852
3853 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
3854 }
3855
3856 /**
3857 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
3858 * @adapter: board private structure
3859 *
3860 * Configure the Rx unit of the MAC after a reset.
3861 **/
3862 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
3863 {
3864 struct ixgbe_hw *hw = &adapter->hw;
3865 int i;
3866 u32 rxctrl, rfctl;
3867
3868 /* disable receives while setting up the descriptors */
3869 hw->mac.ops.disable_rx(hw);
3870
3871 ixgbe_setup_psrtype(adapter);
3872 ixgbe_setup_rdrxctl(adapter);
3873
3874 /* RSC Setup */
3875 rfctl = IXGBE_READ_REG(hw, IXGBE_RFCTL);
3876 rfctl &= ~IXGBE_RFCTL_RSC_DIS;
3877 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
3878 rfctl |= IXGBE_RFCTL_RSC_DIS;
3879 IXGBE_WRITE_REG(hw, IXGBE_RFCTL, rfctl);
3880
3881 /* Program registers for the distribution of queues */
3882 ixgbe_setup_mrqc(adapter);
3883
3884 /* set_rx_buffer_len must be called before ring initialization */
3885 ixgbe_set_rx_buffer_len(adapter);
3886
3887 /*
3888 * Setup the HW Rx Head and Tail Descriptor Pointers and
3889 * the Base and Length of the Rx Descriptor Ring
3890 */
3891 for (i = 0; i < adapter->num_rx_queues; i++)
3892 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
3893
3894 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3895 /* disable drop enable for 82598 parts */
3896 if (hw->mac.type == ixgbe_mac_82598EB)
3897 rxctrl |= IXGBE_RXCTRL_DMBYPS;
3898
3899 /* enable all receives */
3900 rxctrl |= IXGBE_RXCTRL_RXEN;
3901 hw->mac.ops.enable_rx_dma(hw, rxctrl);
3902 }
3903
3904 static int ixgbe_vlan_rx_add_vid(struct net_device *netdev,
3905 __be16 proto, u16 vid)
3906 {
3907 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3908 struct ixgbe_hw *hw = &adapter->hw;
3909
3910 /* add VID to filter table */
3911 hw->mac.ops.set_vfta(&adapter->hw, vid, VMDQ_P(0), true, true);
3912 set_bit(vid, adapter->active_vlans);
3913
3914 return 0;
3915 }
3916
3917 static int ixgbe_find_vlvf_entry(struct ixgbe_hw *hw, u32 vlan)
3918 {
3919 u32 vlvf;
3920 int idx;
3921
3922 /* short cut the special case */
3923 if (vlan == 0)
3924 return 0;
3925
3926 /* Search for the vlan id in the VLVF entries */
3927 for (idx = IXGBE_VLVF_ENTRIES; --idx;) {
3928 vlvf = IXGBE_READ_REG(hw, IXGBE_VLVF(idx));
3929 if ((vlvf & VLAN_VID_MASK) == vlan)
3930 break;
3931 }
3932
3933 return idx;
3934 }
3935
3936 void ixgbe_update_pf_promisc_vlvf(struct ixgbe_adapter *adapter, u32 vid)
3937 {
3938 struct ixgbe_hw *hw = &adapter->hw;
3939 u32 bits, word;
3940 int idx;
3941
3942 idx = ixgbe_find_vlvf_entry(hw, vid);
3943 if (!idx)
3944 return;
3945
3946 /* See if any other pools are set for this VLAN filter
3947 * entry other than the PF.
3948 */
3949 word = idx * 2 + (VMDQ_P(0) / 32);
3950 bits = ~(1 << (VMDQ_P(0)) % 32);
3951 bits &= IXGBE_READ_REG(hw, IXGBE_VLVFB(word));
3952
3953 /* Disable the filter so this falls into the default pool. */
3954 if (!bits && !IXGBE_READ_REG(hw, IXGBE_VLVFB(word ^ 1))) {
3955 if (!(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
3956 IXGBE_WRITE_REG(hw, IXGBE_VLVFB(word), 0);
3957 IXGBE_WRITE_REG(hw, IXGBE_VLVF(idx), 0);
3958 }
3959 }
3960
3961 static int ixgbe_vlan_rx_kill_vid(struct net_device *netdev,
3962 __be16 proto, u16 vid)
3963 {
3964 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3965 struct ixgbe_hw *hw = &adapter->hw;
3966
3967 /* remove VID from filter table */
3968 if (adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC)
3969 ixgbe_update_pf_promisc_vlvf(adapter, vid);
3970 else
3971 hw->mac.ops.set_vfta(hw, vid, VMDQ_P(0), false, true);
3972
3973 clear_bit(vid, adapter->active_vlans);
3974
3975 return 0;
3976 }
3977
3978 /**
3979 * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping
3980 * @adapter: driver data
3981 */
3982 static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
3983 {
3984 struct ixgbe_hw *hw = &adapter->hw;
3985 u32 vlnctrl;
3986 int i, j;
3987
3988 switch (hw->mac.type) {
3989 case ixgbe_mac_82598EB:
3990 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3991 vlnctrl &= ~IXGBE_VLNCTRL_VME;
3992 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3993 break;
3994 case ixgbe_mac_82599EB:
3995 case ixgbe_mac_X540:
3996 case ixgbe_mac_X550:
3997 case ixgbe_mac_X550EM_x:
3998 for (i = 0; i < adapter->num_rx_queues; i++) {
3999 struct ixgbe_ring *ring = adapter->rx_ring[i];
4000
4001 if (ring->l2_accel_priv)
4002 continue;
4003 j = ring->reg_idx;
4004 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
4005 vlnctrl &= ~IXGBE_RXDCTL_VME;
4006 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
4007 }
4008 break;
4009 default:
4010 break;
4011 }
4012 }
4013
4014 /**
4015 * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping
4016 * @adapter: driver data
4017 */
4018 static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
4019 {
4020 struct ixgbe_hw *hw = &adapter->hw;
4021 u32 vlnctrl;
4022 int i, j;
4023
4024 switch (hw->mac.type) {
4025 case ixgbe_mac_82598EB:
4026 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
4027 vlnctrl |= IXGBE_VLNCTRL_VME;
4028 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
4029 break;
4030 case ixgbe_mac_82599EB:
4031 case ixgbe_mac_X540:
4032 case ixgbe_mac_X550:
4033 case ixgbe_mac_X550EM_x:
4034 for (i = 0; i < adapter->num_rx_queues; i++) {
4035 struct ixgbe_ring *ring = adapter->rx_ring[i];
4036
4037 if (ring->l2_accel_priv)
4038 continue;
4039 j = ring->reg_idx;
4040 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
4041 vlnctrl |= IXGBE_RXDCTL_VME;
4042 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
4043 }
4044 break;
4045 default:
4046 break;
4047 }
4048 }
4049
4050 static void ixgbe_vlan_promisc_enable(struct ixgbe_adapter *adapter)
4051 {
4052 struct ixgbe_hw *hw = &adapter->hw;
4053 u32 vlnctrl, i;
4054
4055 switch (hw->mac.type) {
4056 case ixgbe_mac_82599EB:
4057 case ixgbe_mac_X540:
4058 case ixgbe_mac_X550:
4059 case ixgbe_mac_X550EM_x:
4060 default:
4061 if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED)
4062 break;
4063 /* fall through */
4064 case ixgbe_mac_82598EB:
4065 /* legacy case, we can just disable VLAN filtering */
4066 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
4067 vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
4068 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
4069 return;
4070 }
4071
4072 /* We are already in VLAN promisc, nothing to do */
4073 if (adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC)
4074 return;
4075
4076 /* Set flag so we don't redo unnecessary work */
4077 adapter->flags2 |= IXGBE_FLAG2_VLAN_PROMISC;
4078
4079 /* Add PF to all active pools */
4080 for (i = IXGBE_VLVF_ENTRIES; --i;) {
4081 u32 reg_offset = IXGBE_VLVFB(i * 2 + VMDQ_P(0) / 32);
4082 u32 vlvfb = IXGBE_READ_REG(hw, reg_offset);
4083
4084 vlvfb |= 1 << (VMDQ_P(0) % 32);
4085 IXGBE_WRITE_REG(hw, reg_offset, vlvfb);
4086 }
4087
4088 /* Set all bits in the VLAN filter table array */
4089 for (i = hw->mac.vft_size; i--;)
4090 IXGBE_WRITE_REG(hw, IXGBE_VFTA(i), ~0U);
4091 }
4092
4093 #define VFTA_BLOCK_SIZE 8
4094 static void ixgbe_scrub_vfta(struct ixgbe_adapter *adapter, u32 vfta_offset)
4095 {
4096 struct ixgbe_hw *hw = &adapter->hw;
4097 u32 vfta[VFTA_BLOCK_SIZE] = { 0 };
4098 u32 vid_start = vfta_offset * 32;
4099 u32 vid_end = vid_start + (VFTA_BLOCK_SIZE * 32);
4100 u32 i, vid, word, bits;
4101
4102 for (i = IXGBE_VLVF_ENTRIES; --i;) {
4103 u32 vlvf = IXGBE_READ_REG(hw, IXGBE_VLVF(i));
4104
4105 /* pull VLAN ID from VLVF */
4106 vid = vlvf & VLAN_VID_MASK;
4107
4108 /* only concern outselves with a certain range */
4109 if (vid < vid_start || vid >= vid_end)
4110 continue;
4111
4112 if (vlvf) {
4113 /* record VLAN ID in VFTA */
4114 vfta[(vid - vid_start) / 32] |= 1 << (vid % 32);
4115
4116 /* if PF is part of this then continue */
4117 if (test_bit(vid, adapter->active_vlans))
4118 continue;
4119 }
4120
4121 /* remove PF from the pool */
4122 word = i * 2 + VMDQ_P(0) / 32;
4123 bits = ~(1 << (VMDQ_P(0) % 32));
4124 bits &= IXGBE_READ_REG(hw, IXGBE_VLVFB(word));
4125 IXGBE_WRITE_REG(hw, IXGBE_VLVFB(word), bits);
4126 }
4127
4128 /* extract values from active_vlans and write back to VFTA */
4129 for (i = VFTA_BLOCK_SIZE; i--;) {
4130 vid = (vfta_offset + i) * 32;
4131 word = vid / BITS_PER_LONG;
4132 bits = vid % BITS_PER_LONG;
4133
4134 vfta[i] |= adapter->active_vlans[word] >> bits;
4135
4136 IXGBE_WRITE_REG(hw, IXGBE_VFTA(vfta_offset + i), vfta[i]);
4137 }
4138 }
4139
4140 static void ixgbe_vlan_promisc_disable(struct ixgbe_adapter *adapter)
4141 {
4142 struct ixgbe_hw *hw = &adapter->hw;
4143 u32 vlnctrl, i;
4144
4145 switch (hw->mac.type) {
4146 case ixgbe_mac_82599EB:
4147 case ixgbe_mac_X540:
4148 case ixgbe_mac_X550:
4149 case ixgbe_mac_X550EM_x:
4150 default:
4151 if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED)
4152 break;
4153 /* fall through */
4154 case ixgbe_mac_82598EB:
4155 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
4156 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
4157 vlnctrl |= IXGBE_VLNCTRL_VFE;
4158 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
4159 return;
4160 }
4161
4162 /* We are not in VLAN promisc, nothing to do */
4163 if (!(adapter->flags2 & IXGBE_FLAG2_VLAN_PROMISC))
4164 return;
4165
4166 /* Set flag so we don't redo unnecessary work */
4167 adapter->flags2 &= ~IXGBE_FLAG2_VLAN_PROMISC;
4168
4169 for (i = 0; i < hw->mac.vft_size; i += VFTA_BLOCK_SIZE)
4170 ixgbe_scrub_vfta(adapter, i);
4171 }
4172
4173 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
4174 {
4175 u16 vid;
4176
4177 ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0);
4178
4179 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
4180 ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
4181 }
4182
4183 /**
4184 * ixgbe_write_mc_addr_list - write multicast addresses to MTA
4185 * @netdev: network interface device structure
4186 *
4187 * Writes multicast address list to the MTA hash table.
4188 * Returns: -ENOMEM on failure
4189 * 0 on no addresses written
4190 * X on writing X addresses to MTA
4191 **/
4192 static int ixgbe_write_mc_addr_list(struct net_device *netdev)
4193 {
4194 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4195 struct ixgbe_hw *hw = &adapter->hw;
4196
4197 if (!netif_running(netdev))
4198 return 0;
4199
4200 if (hw->mac.ops.update_mc_addr_list)
4201 hw->mac.ops.update_mc_addr_list(hw, netdev);
4202 else
4203 return -ENOMEM;
4204
4205 #ifdef CONFIG_PCI_IOV
4206 ixgbe_restore_vf_multicasts(adapter);
4207 #endif
4208
4209 return netdev_mc_count(netdev);
4210 }
4211
4212 #ifdef CONFIG_PCI_IOV
4213 void ixgbe_full_sync_mac_table(struct ixgbe_adapter *adapter)
4214 {
4215 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4216 struct ixgbe_hw *hw = &adapter->hw;
4217 int i;
4218
4219 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4220 mac_table->state &= ~IXGBE_MAC_STATE_MODIFIED;
4221
4222 if (mac_table->state & IXGBE_MAC_STATE_IN_USE)
4223 hw->mac.ops.set_rar(hw, i,
4224 mac_table->addr,
4225 mac_table->pool,
4226 IXGBE_RAH_AV);
4227 else
4228 hw->mac.ops.clear_rar(hw, i);
4229 }
4230 }
4231
4232 #endif
4233 static void ixgbe_sync_mac_table(struct ixgbe_adapter *adapter)
4234 {
4235 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4236 struct ixgbe_hw *hw = &adapter->hw;
4237 int i;
4238
4239 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4240 if (!(mac_table->state & IXGBE_MAC_STATE_MODIFIED))
4241 continue;
4242
4243 mac_table->state &= ~IXGBE_MAC_STATE_MODIFIED;
4244
4245 if (mac_table->state & IXGBE_MAC_STATE_IN_USE)
4246 hw->mac.ops.set_rar(hw, i,
4247 mac_table->addr,
4248 mac_table->pool,
4249 IXGBE_RAH_AV);
4250 else
4251 hw->mac.ops.clear_rar(hw, i);
4252 }
4253 }
4254
4255 static void ixgbe_flush_sw_mac_table(struct ixgbe_adapter *adapter)
4256 {
4257 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4258 struct ixgbe_hw *hw = &adapter->hw;
4259 int i;
4260
4261 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4262 mac_table->state |= IXGBE_MAC_STATE_MODIFIED;
4263 mac_table->state &= ~IXGBE_MAC_STATE_IN_USE;
4264 }
4265
4266 ixgbe_sync_mac_table(adapter);
4267 }
4268
4269 static int ixgbe_available_rars(struct ixgbe_adapter *adapter, u16 pool)
4270 {
4271 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4272 struct ixgbe_hw *hw = &adapter->hw;
4273 int i, count = 0;
4274
4275 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4276 /* do not count default RAR as available */
4277 if (mac_table->state & IXGBE_MAC_STATE_DEFAULT)
4278 continue;
4279
4280 /* only count unused and addresses that belong to us */
4281 if (mac_table->state & IXGBE_MAC_STATE_IN_USE) {
4282 if (mac_table->pool != pool)
4283 continue;
4284 }
4285
4286 count++;
4287 }
4288
4289 return count;
4290 }
4291
4292 /* this function destroys the first RAR entry */
4293 static void ixgbe_mac_set_default_filter(struct ixgbe_adapter *adapter)
4294 {
4295 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4296 struct ixgbe_hw *hw = &adapter->hw;
4297
4298 memcpy(&mac_table->addr, hw->mac.addr, ETH_ALEN);
4299 mac_table->pool = VMDQ_P(0);
4300
4301 mac_table->state = IXGBE_MAC_STATE_DEFAULT | IXGBE_MAC_STATE_IN_USE;
4302
4303 hw->mac.ops.set_rar(hw, 0, mac_table->addr, mac_table->pool,
4304 IXGBE_RAH_AV);
4305 }
4306
4307 int ixgbe_add_mac_filter(struct ixgbe_adapter *adapter,
4308 const u8 *addr, u16 pool)
4309 {
4310 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4311 struct ixgbe_hw *hw = &adapter->hw;
4312 int i;
4313
4314 if (is_zero_ether_addr(addr))
4315 return -EINVAL;
4316
4317 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4318 if (mac_table->state & IXGBE_MAC_STATE_IN_USE)
4319 continue;
4320
4321 ether_addr_copy(mac_table->addr, addr);
4322 mac_table->pool = pool;
4323
4324 mac_table->state |= IXGBE_MAC_STATE_MODIFIED |
4325 IXGBE_MAC_STATE_IN_USE;
4326
4327 ixgbe_sync_mac_table(adapter);
4328
4329 return i;
4330 }
4331
4332 return -ENOMEM;
4333 }
4334
4335 int ixgbe_del_mac_filter(struct ixgbe_adapter *adapter,
4336 const u8 *addr, u16 pool)
4337 {
4338 struct ixgbe_mac_addr *mac_table = &adapter->mac_table[0];
4339 struct ixgbe_hw *hw = &adapter->hw;
4340 int i;
4341
4342 if (is_zero_ether_addr(addr))
4343 return -EINVAL;
4344
4345 /* search table for addr, if found clear IN_USE flag and sync */
4346 for (i = 0; i < hw->mac.num_rar_entries; i++, mac_table++) {
4347 /* we can only delete an entry if it is in use */
4348 if (!(mac_table->state & IXGBE_MAC_STATE_IN_USE))
4349 continue;
4350 /* we only care about entries that belong to the given pool */
4351 if (mac_table->pool != pool)
4352 continue;
4353 /* we only care about a specific MAC address */
4354 if (!ether_addr_equal(addr, mac_table->addr))
4355 continue;
4356
4357 mac_table->state |= IXGBE_MAC_STATE_MODIFIED;
4358 mac_table->state &= ~IXGBE_MAC_STATE_IN_USE;
4359
4360 ixgbe_sync_mac_table(adapter);
4361
4362 return 0;
4363 }
4364
4365 return -ENOMEM;
4366 }
4367 /**
4368 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
4369 * @netdev: network interface device structure
4370 *
4371 * Writes unicast address list to the RAR table.
4372 * Returns: -ENOMEM on failure/insufficient address space
4373 * 0 on no addresses written
4374 * X on writing X addresses to the RAR table
4375 **/
4376 static int ixgbe_write_uc_addr_list(struct net_device *netdev, int vfn)
4377 {
4378 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4379 int count = 0;
4380
4381 /* return ENOMEM indicating insufficient memory for addresses */
4382 if (netdev_uc_count(netdev) > ixgbe_available_rars(adapter, vfn))
4383 return -ENOMEM;
4384
4385 if (!netdev_uc_empty(netdev)) {
4386 struct netdev_hw_addr *ha;
4387 netdev_for_each_uc_addr(ha, netdev) {
4388 ixgbe_del_mac_filter(adapter, ha->addr, vfn);
4389 ixgbe_add_mac_filter(adapter, ha->addr, vfn);
4390 count++;
4391 }
4392 }
4393 return count;
4394 }
4395
4396 static int ixgbe_uc_sync(struct net_device *netdev, const unsigned char *addr)
4397 {
4398 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4399 int ret;
4400
4401 ret = ixgbe_add_mac_filter(adapter, addr, VMDQ_P(0));
4402
4403 return min_t(int, ret, 0);
4404 }
4405
4406 static int ixgbe_uc_unsync(struct net_device *netdev, const unsigned char *addr)
4407 {
4408 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4409
4410 ixgbe_del_mac_filter(adapter, addr, VMDQ_P(0));
4411
4412 return 0;
4413 }
4414
4415 /**
4416 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
4417 * @netdev: network interface device structure
4418 *
4419 * The set_rx_method entry point is called whenever the unicast/multicast
4420 * address list or the network interface flags are updated. This routine is
4421 * responsible for configuring the hardware for proper unicast, multicast and
4422 * promiscuous mode.
4423 **/
4424 void ixgbe_set_rx_mode(struct net_device *netdev)
4425 {
4426 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4427 struct ixgbe_hw *hw = &adapter->hw;
4428 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
4429 int count;
4430
4431 /* Check for Promiscuous and All Multicast modes */
4432 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4433
4434 /* set all bits that we expect to always be set */
4435 fctrl &= ~IXGBE_FCTRL_SBP; /* disable store-bad-packets */
4436 fctrl |= IXGBE_FCTRL_BAM;
4437 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
4438 fctrl |= IXGBE_FCTRL_PMCF;
4439
4440 /* clear the bits we are changing the status of */
4441 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
4442 if (netdev->flags & IFF_PROMISC) {
4443 hw->addr_ctrl.user_set_promisc = true;
4444 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
4445 vmolr |= IXGBE_VMOLR_MPE;
4446 ixgbe_vlan_promisc_enable(adapter);
4447 } else {
4448 if (netdev->flags & IFF_ALLMULTI) {
4449 fctrl |= IXGBE_FCTRL_MPE;
4450 vmolr |= IXGBE_VMOLR_MPE;
4451 }
4452 hw->addr_ctrl.user_set_promisc = false;
4453 ixgbe_vlan_promisc_disable(adapter);
4454 }
4455
4456 /*
4457 * Write addresses to available RAR registers, if there is not
4458 * sufficient space to store all the addresses then enable
4459 * unicast promiscuous mode
4460 */
4461 if (__dev_uc_sync(netdev, ixgbe_uc_sync, ixgbe_uc_unsync)) {
4462 fctrl |= IXGBE_FCTRL_UPE;
4463 vmolr |= IXGBE_VMOLR_ROPE;
4464 }
4465
4466 /* Write addresses to the MTA, if the attempt fails
4467 * then we should just turn on promiscuous mode so
4468 * that we can at least receive multicast traffic
4469 */
4470 count = ixgbe_write_mc_addr_list(netdev);
4471 if (count < 0) {
4472 fctrl |= IXGBE_FCTRL_MPE;
4473 vmolr |= IXGBE_VMOLR_MPE;
4474 } else if (count) {
4475 vmolr |= IXGBE_VMOLR_ROMPE;
4476 }
4477
4478 if (hw->mac.type != ixgbe_mac_82598EB) {
4479 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(VMDQ_P(0))) &
4480 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
4481 IXGBE_VMOLR_ROPE);
4482 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(VMDQ_P(0)), vmolr);
4483 }
4484
4485 /* This is useful for sniffing bad packets. */
4486 if (adapter->netdev->features & NETIF_F_RXALL) {
4487 /* UPE and MPE will be handled by normal PROMISC logic
4488 * in e1000e_set_rx_mode */
4489 fctrl |= (IXGBE_FCTRL_SBP | /* Receive bad packets */
4490 IXGBE_FCTRL_BAM | /* RX All Bcast Pkts */
4491 IXGBE_FCTRL_PMCF); /* RX All MAC Ctrl Pkts */
4492
4493 fctrl &= ~(IXGBE_FCTRL_DPF);
4494 /* NOTE: VLAN filtering is disabled by setting PROMISC */
4495 }
4496
4497 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
4498
4499 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
4500 ixgbe_vlan_strip_enable(adapter);
4501 else
4502 ixgbe_vlan_strip_disable(adapter);
4503 }
4504
4505 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
4506 {
4507 int q_idx;
4508
4509 for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) {
4510 ixgbe_qv_init_lock(adapter->q_vector[q_idx]);
4511 napi_enable(&adapter->q_vector[q_idx]->napi);
4512 }
4513 }
4514
4515 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
4516 {
4517 int q_idx;
4518
4519 for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) {
4520 napi_disable(&adapter->q_vector[q_idx]->napi);
4521 while (!ixgbe_qv_disable(adapter->q_vector[q_idx])) {
4522 pr_info("QV %d locked\n", q_idx);
4523 usleep_range(1000, 20000);
4524 }
4525 }
4526 }
4527
4528 static void ixgbe_clear_vxlan_port(struct ixgbe_adapter *adapter)
4529 {
4530 switch (adapter->hw.mac.type) {
4531 case ixgbe_mac_X550:
4532 case ixgbe_mac_X550EM_x:
4533 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VXLANCTRL, 0);
4534 #ifdef CONFIG_IXGBE_VXLAN
4535 adapter->vxlan_port = 0;
4536 #endif
4537 break;
4538 default:
4539 break;
4540 }
4541 }
4542
4543 #ifdef CONFIG_IXGBE_DCB
4544 /**
4545 * ixgbe_configure_dcb - Configure DCB hardware
4546 * @adapter: ixgbe adapter struct
4547 *
4548 * This is called by the driver on open to configure the DCB hardware.
4549 * This is also called by the gennetlink interface when reconfiguring
4550 * the DCB state.
4551 */
4552 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
4553 {
4554 struct ixgbe_hw *hw = &adapter->hw;
4555 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
4556
4557 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
4558 if (hw->mac.type == ixgbe_mac_82598EB)
4559 netif_set_gso_max_size(adapter->netdev, 65536);
4560 return;
4561 }
4562
4563 if (hw->mac.type == ixgbe_mac_82598EB)
4564 netif_set_gso_max_size(adapter->netdev, 32768);
4565
4566 #ifdef IXGBE_FCOE
4567 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
4568 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
4569 #endif
4570
4571 /* reconfigure the hardware */
4572 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE) {
4573 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
4574 DCB_TX_CONFIG);
4575 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
4576 DCB_RX_CONFIG);
4577 ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
4578 } else if (adapter->ixgbe_ieee_ets && adapter->ixgbe_ieee_pfc) {
4579 ixgbe_dcb_hw_ets(&adapter->hw,
4580 adapter->ixgbe_ieee_ets,
4581 max_frame);
4582 ixgbe_dcb_hw_pfc_config(&adapter->hw,
4583 adapter->ixgbe_ieee_pfc->pfc_en,
4584 adapter->ixgbe_ieee_ets->prio_tc);
4585 }
4586
4587 /* Enable RSS Hash per TC */
4588 if (hw->mac.type != ixgbe_mac_82598EB) {
4589 u32 msb = 0;
4590 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices - 1;
4591
4592 while (rss_i) {
4593 msb++;
4594 rss_i >>= 1;
4595 }
4596
4597 /* write msb to all 8 TCs in one write */
4598 IXGBE_WRITE_REG(hw, IXGBE_RQTC, msb * 0x11111111);
4599 }
4600 }
4601 #endif
4602
4603 /* Additional bittime to account for IXGBE framing */
4604 #define IXGBE_ETH_FRAMING 20
4605
4606 /**
4607 * ixgbe_hpbthresh - calculate high water mark for flow control
4608 *
4609 * @adapter: board private structure to calculate for
4610 * @pb: packet buffer to calculate
4611 */
4612 static int ixgbe_hpbthresh(struct ixgbe_adapter *adapter, int pb)
4613 {
4614 struct ixgbe_hw *hw = &adapter->hw;
4615 struct net_device *dev = adapter->netdev;
4616 int link, tc, kb, marker;
4617 u32 dv_id, rx_pba;
4618
4619 /* Calculate max LAN frame size */
4620 tc = link = dev->mtu + ETH_HLEN + ETH_FCS_LEN + IXGBE_ETH_FRAMING;
4621
4622 #ifdef IXGBE_FCOE
4623 /* FCoE traffic class uses FCOE jumbo frames */
4624 if ((dev->features & NETIF_F_FCOE_MTU) &&
4625 (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
4626 (pb == ixgbe_fcoe_get_tc(adapter)))
4627 tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
4628 #endif
4629
4630 /* Calculate delay value for device */
4631 switch (hw->mac.type) {
4632 case ixgbe_mac_X540:
4633 case ixgbe_mac_X550:
4634 case ixgbe_mac_X550EM_x:
4635 dv_id = IXGBE_DV_X540(link, tc);
4636 break;
4637 default:
4638 dv_id = IXGBE_DV(link, tc);
4639 break;
4640 }
4641
4642 /* Loopback switch introduces additional latency */
4643 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4644 dv_id += IXGBE_B2BT(tc);
4645
4646 /* Delay value is calculated in bit times convert to KB */
4647 kb = IXGBE_BT2KB(dv_id);
4648 rx_pba = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(pb)) >> 10;
4649
4650 marker = rx_pba - kb;
4651
4652 /* It is possible that the packet buffer is not large enough
4653 * to provide required headroom. In this case throw an error
4654 * to user and a do the best we can.
4655 */
4656 if (marker < 0) {
4657 e_warn(drv, "Packet Buffer(%i) can not provide enough"
4658 "headroom to support flow control."
4659 "Decrease MTU or number of traffic classes\n", pb);
4660 marker = tc + 1;
4661 }
4662
4663 return marker;
4664 }
4665
4666 /**
4667 * ixgbe_lpbthresh - calculate low water mark for for flow control
4668 *
4669 * @adapter: board private structure to calculate for
4670 * @pb: packet buffer to calculate
4671 */
4672 static int ixgbe_lpbthresh(struct ixgbe_adapter *adapter, int pb)
4673 {
4674 struct ixgbe_hw *hw = &adapter->hw;
4675 struct net_device *dev = adapter->netdev;
4676 int tc;
4677 u32 dv_id;
4678
4679 /* Calculate max LAN frame size */
4680 tc = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
4681
4682 #ifdef IXGBE_FCOE
4683 /* FCoE traffic class uses FCOE jumbo frames */
4684 if ((dev->features & NETIF_F_FCOE_MTU) &&
4685 (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
4686 (pb == netdev_get_prio_tc_map(dev, adapter->fcoe.up)))
4687 tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
4688 #endif
4689
4690 /* Calculate delay value for device */
4691 switch (hw->mac.type) {
4692 case ixgbe_mac_X540:
4693 case ixgbe_mac_X550:
4694 case ixgbe_mac_X550EM_x:
4695 dv_id = IXGBE_LOW_DV_X540(tc);
4696 break;
4697 default:
4698 dv_id = IXGBE_LOW_DV(tc);
4699 break;
4700 }
4701
4702 /* Delay value is calculated in bit times convert to KB */
4703 return IXGBE_BT2KB(dv_id);
4704 }
4705
4706 /*
4707 * ixgbe_pbthresh_setup - calculate and setup high low water marks
4708 */
4709 static void ixgbe_pbthresh_setup(struct ixgbe_adapter *adapter)
4710 {
4711 struct ixgbe_hw *hw = &adapter->hw;
4712 int num_tc = netdev_get_num_tc(adapter->netdev);
4713 int i;
4714
4715 if (!num_tc)
4716 num_tc = 1;
4717
4718 for (i = 0; i < num_tc; i++) {
4719 hw->fc.high_water[i] = ixgbe_hpbthresh(adapter, i);
4720 hw->fc.low_water[i] = ixgbe_lpbthresh(adapter, i);
4721
4722 /* Low water marks must not be larger than high water marks */
4723 if (hw->fc.low_water[i] > hw->fc.high_water[i])
4724 hw->fc.low_water[i] = 0;
4725 }
4726
4727 for (; i < MAX_TRAFFIC_CLASS; i++)
4728 hw->fc.high_water[i] = 0;
4729 }
4730
4731 static void ixgbe_configure_pb(struct ixgbe_adapter *adapter)
4732 {
4733 struct ixgbe_hw *hw = &adapter->hw;
4734 int hdrm;
4735 u8 tc = netdev_get_num_tc(adapter->netdev);
4736
4737 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
4738 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
4739 hdrm = 32 << adapter->fdir_pballoc;
4740 else
4741 hdrm = 0;
4742
4743 hw->mac.ops.set_rxpba(hw, tc, hdrm, PBA_STRATEGY_EQUAL);
4744 ixgbe_pbthresh_setup(adapter);
4745 }
4746
4747 static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
4748 {
4749 struct ixgbe_hw *hw = &adapter->hw;
4750 struct hlist_node *node2;
4751 struct ixgbe_fdir_filter *filter;
4752
4753 spin_lock(&adapter->fdir_perfect_lock);
4754
4755 if (!hlist_empty(&adapter->fdir_filter_list))
4756 ixgbe_fdir_set_input_mask_82599(hw, &adapter->fdir_mask);
4757
4758 hlist_for_each_entry_safe(filter, node2,
4759 &adapter->fdir_filter_list, fdir_node) {
4760 ixgbe_fdir_write_perfect_filter_82599(hw,
4761 &filter->filter,
4762 filter->sw_idx,
4763 (filter->action == IXGBE_FDIR_DROP_QUEUE) ?
4764 IXGBE_FDIR_DROP_QUEUE :
4765 adapter->rx_ring[filter->action]->reg_idx);
4766 }
4767
4768 spin_unlock(&adapter->fdir_perfect_lock);
4769 }
4770
4771 static void ixgbe_macvlan_set_rx_mode(struct net_device *dev, unsigned int pool,
4772 struct ixgbe_adapter *adapter)
4773 {
4774 struct ixgbe_hw *hw = &adapter->hw;
4775 u32 vmolr;
4776
4777 /* No unicast promiscuous support for VMDQ devices. */
4778 vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(pool));
4779 vmolr |= (IXGBE_VMOLR_ROMPE | IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE);
4780
4781 /* clear the affected bit */
4782 vmolr &= ~IXGBE_VMOLR_MPE;
4783
4784 if (dev->flags & IFF_ALLMULTI) {
4785 vmolr |= IXGBE_VMOLR_MPE;
4786 } else {
4787 vmolr |= IXGBE_VMOLR_ROMPE;
4788 hw->mac.ops.update_mc_addr_list(hw, dev);
4789 }
4790 ixgbe_write_uc_addr_list(adapter->netdev, pool);
4791 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(pool), vmolr);
4792 }
4793
4794 static void ixgbe_fwd_psrtype(struct ixgbe_fwd_adapter *vadapter)
4795 {
4796 struct ixgbe_adapter *adapter = vadapter->real_adapter;
4797 int rss_i = adapter->num_rx_queues_per_pool;
4798 struct ixgbe_hw *hw = &adapter->hw;
4799 u16 pool = vadapter->pool;
4800 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
4801 IXGBE_PSRTYPE_UDPHDR |
4802 IXGBE_PSRTYPE_IPV4HDR |
4803 IXGBE_PSRTYPE_L2HDR |
4804 IXGBE_PSRTYPE_IPV6HDR;
4805
4806 if (hw->mac.type == ixgbe_mac_82598EB)
4807 return;
4808
4809 if (rss_i > 3)
4810 psrtype |= 2 << 29;
4811 else if (rss_i > 1)
4812 psrtype |= 1 << 29;
4813
4814 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(VMDQ_P(pool)), psrtype);
4815 }
4816
4817 /**
4818 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
4819 * @rx_ring: ring to free buffers from
4820 **/
4821 static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring)
4822 {
4823 struct device *dev = rx_ring->dev;
4824 unsigned long size;
4825 u16 i;
4826
4827 /* ring already cleared, nothing to do */
4828 if (!rx_ring->rx_buffer_info)
4829 return;
4830
4831 /* Free all the Rx ring sk_buffs */
4832 for (i = 0; i < rx_ring->count; i++) {
4833 struct ixgbe_rx_buffer *rx_buffer = &rx_ring->rx_buffer_info[i];
4834
4835 if (rx_buffer->skb) {
4836 struct sk_buff *skb = rx_buffer->skb;
4837 if (IXGBE_CB(skb)->page_released)
4838 dma_unmap_page(dev,
4839 IXGBE_CB(skb)->dma,
4840 ixgbe_rx_bufsz(rx_ring),
4841 DMA_FROM_DEVICE);
4842 dev_kfree_skb(skb);
4843 rx_buffer->skb = NULL;
4844 }
4845
4846 if (!rx_buffer->page)
4847 continue;
4848
4849 dma_unmap_page(dev, rx_buffer->dma,
4850 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
4851 __free_pages(rx_buffer->page, ixgbe_rx_pg_order(rx_ring));
4852
4853 rx_buffer->page = NULL;
4854 }
4855
4856 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4857 memset(rx_ring->rx_buffer_info, 0, size);
4858
4859 /* Zero out the descriptor ring */
4860 memset(rx_ring->desc, 0, rx_ring->size);
4861
4862 rx_ring->next_to_alloc = 0;
4863 rx_ring->next_to_clean = 0;
4864 rx_ring->next_to_use = 0;
4865 }
4866
4867 static void ixgbe_disable_fwd_ring(struct ixgbe_fwd_adapter *vadapter,
4868 struct ixgbe_ring *rx_ring)
4869 {
4870 struct ixgbe_adapter *adapter = vadapter->real_adapter;
4871 int index = rx_ring->queue_index + vadapter->rx_base_queue;
4872
4873 /* shutdown specific queue receive and wait for dma to settle */
4874 ixgbe_disable_rx_queue(adapter, rx_ring);
4875 usleep_range(10000, 20000);
4876 ixgbe_irq_disable_queues(adapter, ((u64)1 << index));
4877 ixgbe_clean_rx_ring(rx_ring);
4878 rx_ring->l2_accel_priv = NULL;
4879 }
4880
4881 static int ixgbe_fwd_ring_down(struct net_device *vdev,
4882 struct ixgbe_fwd_adapter *accel)
4883 {
4884 struct ixgbe_adapter *adapter = accel->real_adapter;
4885 unsigned int rxbase = accel->rx_base_queue;
4886 unsigned int txbase = accel->tx_base_queue;
4887 int i;
4888
4889 netif_tx_stop_all_queues(vdev);
4890
4891 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4892 ixgbe_disable_fwd_ring(accel, adapter->rx_ring[rxbase + i]);
4893 adapter->rx_ring[rxbase + i]->netdev = adapter->netdev;
4894 }
4895
4896 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4897 adapter->tx_ring[txbase + i]->l2_accel_priv = NULL;
4898 adapter->tx_ring[txbase + i]->netdev = adapter->netdev;
4899 }
4900
4901
4902 return 0;
4903 }
4904
4905 static int ixgbe_fwd_ring_up(struct net_device *vdev,
4906 struct ixgbe_fwd_adapter *accel)
4907 {
4908 struct ixgbe_adapter *adapter = accel->real_adapter;
4909 unsigned int rxbase, txbase, queues;
4910 int i, baseq, err = 0;
4911
4912 if (!test_bit(accel->pool, &adapter->fwd_bitmask))
4913 return 0;
4914
4915 baseq = accel->pool * adapter->num_rx_queues_per_pool;
4916 netdev_dbg(vdev, "pool %i:%i queues %i:%i VSI bitmask %lx\n",
4917 accel->pool, adapter->num_rx_pools,
4918 baseq, baseq + adapter->num_rx_queues_per_pool,
4919 adapter->fwd_bitmask);
4920
4921 accel->netdev = vdev;
4922 accel->rx_base_queue = rxbase = baseq;
4923 accel->tx_base_queue = txbase = baseq;
4924
4925 for (i = 0; i < adapter->num_rx_queues_per_pool; i++)
4926 ixgbe_disable_fwd_ring(accel, adapter->rx_ring[rxbase + i]);
4927
4928 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4929 adapter->rx_ring[rxbase + i]->netdev = vdev;
4930 adapter->rx_ring[rxbase + i]->l2_accel_priv = accel;
4931 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[rxbase + i]);
4932 }
4933
4934 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4935 adapter->tx_ring[txbase + i]->netdev = vdev;
4936 adapter->tx_ring[txbase + i]->l2_accel_priv = accel;
4937 }
4938
4939 queues = min_t(unsigned int,
4940 adapter->num_rx_queues_per_pool, vdev->num_tx_queues);
4941 err = netif_set_real_num_tx_queues(vdev, queues);
4942 if (err)
4943 goto fwd_queue_err;
4944
4945 err = netif_set_real_num_rx_queues(vdev, queues);
4946 if (err)
4947 goto fwd_queue_err;
4948
4949 if (is_valid_ether_addr(vdev->dev_addr))
4950 ixgbe_add_mac_filter(adapter, vdev->dev_addr, accel->pool);
4951
4952 ixgbe_fwd_psrtype(accel);
4953 ixgbe_macvlan_set_rx_mode(vdev, accel->pool, adapter);
4954 return err;
4955 fwd_queue_err:
4956 ixgbe_fwd_ring_down(vdev, accel);
4957 return err;
4958 }
4959
4960 static void ixgbe_configure_dfwd(struct ixgbe_adapter *adapter)
4961 {
4962 struct net_device *upper;
4963 struct list_head *iter;
4964 int err;
4965
4966 netdev_for_each_all_upper_dev_rcu(adapter->netdev, upper, iter) {
4967 if (netif_is_macvlan(upper)) {
4968 struct macvlan_dev *dfwd = netdev_priv(upper);
4969 struct ixgbe_fwd_adapter *vadapter = dfwd->fwd_priv;
4970
4971 if (dfwd->fwd_priv) {
4972 err = ixgbe_fwd_ring_up(upper, vadapter);
4973 if (err)
4974 continue;
4975 }
4976 }
4977 }
4978 }
4979
4980 static void ixgbe_configure(struct ixgbe_adapter *adapter)
4981 {
4982 struct ixgbe_hw *hw = &adapter->hw;
4983
4984 ixgbe_configure_pb(adapter);
4985 #ifdef CONFIG_IXGBE_DCB
4986 ixgbe_configure_dcb(adapter);
4987 #endif
4988 /*
4989 * We must restore virtualization before VLANs or else
4990 * the VLVF registers will not be populated
4991 */
4992 ixgbe_configure_virtualization(adapter);
4993
4994 ixgbe_set_rx_mode(adapter->netdev);
4995 ixgbe_restore_vlan(adapter);
4996
4997 switch (hw->mac.type) {
4998 case ixgbe_mac_82599EB:
4999 case ixgbe_mac_X540:
5000 hw->mac.ops.disable_rx_buff(hw);
5001 break;
5002 default:
5003 break;
5004 }
5005
5006 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
5007 ixgbe_init_fdir_signature_82599(&adapter->hw,
5008 adapter->fdir_pballoc);
5009 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
5010 ixgbe_init_fdir_perfect_82599(&adapter->hw,
5011 adapter->fdir_pballoc);
5012 ixgbe_fdir_filter_restore(adapter);
5013 }
5014
5015 switch (hw->mac.type) {
5016 case ixgbe_mac_82599EB:
5017 case ixgbe_mac_X540:
5018 hw->mac.ops.enable_rx_buff(hw);
5019 break;
5020 default:
5021 break;
5022 }
5023
5024 #ifdef CONFIG_IXGBE_DCA
5025 /* configure DCA */
5026 if (adapter->flags & IXGBE_FLAG_DCA_CAPABLE)
5027 ixgbe_setup_dca(adapter);
5028 #endif /* CONFIG_IXGBE_DCA */
5029
5030 #ifdef IXGBE_FCOE
5031 /* configure FCoE L2 filters, redirection table, and Rx control */
5032 ixgbe_configure_fcoe(adapter);
5033
5034 #endif /* IXGBE_FCOE */
5035 ixgbe_configure_tx(adapter);
5036 ixgbe_configure_rx(adapter);
5037 ixgbe_configure_dfwd(adapter);
5038 }
5039
5040 /**
5041 * ixgbe_sfp_link_config - set up SFP+ link
5042 * @adapter: pointer to private adapter struct
5043 **/
5044 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
5045 {
5046 /*
5047 * We are assuming the worst case scenario here, and that
5048 * is that an SFP was inserted/removed after the reset
5049 * but before SFP detection was enabled. As such the best
5050 * solution is to just start searching as soon as we start
5051 */
5052 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
5053 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
5054
5055 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
5056 adapter->sfp_poll_time = 0;
5057 }
5058
5059 /**
5060 * ixgbe_non_sfp_link_config - set up non-SFP+ link
5061 * @hw: pointer to private hardware struct
5062 *
5063 * Returns 0 on success, negative on failure
5064 **/
5065 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
5066 {
5067 u32 speed;
5068 bool autoneg, link_up = false;
5069 int ret = IXGBE_ERR_LINK_SETUP;
5070
5071 if (hw->mac.ops.check_link)
5072 ret = hw->mac.ops.check_link(hw, &speed, &link_up, false);
5073
5074 if (ret)
5075 return ret;
5076
5077 speed = hw->phy.autoneg_advertised;
5078 if ((!speed) && (hw->mac.ops.get_link_capabilities))
5079 ret = hw->mac.ops.get_link_capabilities(hw, &speed,
5080 &autoneg);
5081 if (ret)
5082 return ret;
5083
5084 if (hw->mac.ops.setup_link)
5085 ret = hw->mac.ops.setup_link(hw, speed, link_up);
5086
5087 return ret;
5088 }
5089
5090 static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
5091 {
5092 struct ixgbe_hw *hw = &adapter->hw;
5093 u32 gpie = 0;
5094
5095 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
5096 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
5097 IXGBE_GPIE_OCD;
5098 gpie |= IXGBE_GPIE_EIAME;
5099 /*
5100 * use EIAM to auto-mask when MSI-X interrupt is asserted
5101 * this saves a register write for every interrupt
5102 */
5103 switch (hw->mac.type) {
5104 case ixgbe_mac_82598EB:
5105 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
5106 break;
5107 case ixgbe_mac_82599EB:
5108 case ixgbe_mac_X540:
5109 case ixgbe_mac_X550:
5110 case ixgbe_mac_X550EM_x:
5111 default:
5112 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
5113 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
5114 break;
5115 }
5116 } else {
5117 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
5118 * specifically only auto mask tx and rx interrupts */
5119 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
5120 }
5121
5122 /* XXX: to interrupt immediately for EICS writes, enable this */
5123 /* gpie |= IXGBE_GPIE_EIMEN; */
5124
5125 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
5126 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
5127
5128 switch (adapter->ring_feature[RING_F_VMDQ].mask) {
5129 case IXGBE_82599_VMDQ_8Q_MASK:
5130 gpie |= IXGBE_GPIE_VTMODE_16;
5131 break;
5132 case IXGBE_82599_VMDQ_4Q_MASK:
5133 gpie |= IXGBE_GPIE_VTMODE_32;
5134 break;
5135 default:
5136 gpie |= IXGBE_GPIE_VTMODE_64;
5137 break;
5138 }
5139 }
5140
5141 /* Enable Thermal over heat sensor interrupt */
5142 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
5143 switch (adapter->hw.mac.type) {
5144 case ixgbe_mac_82599EB:
5145 gpie |= IXGBE_SDP0_GPIEN_8259X;
5146 break;
5147 default:
5148 break;
5149 }
5150 }
5151
5152 /* Enable fan failure interrupt */
5153 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
5154 gpie |= IXGBE_SDP1_GPIEN(hw);
5155
5156 switch (hw->mac.type) {
5157 case ixgbe_mac_82599EB:
5158 gpie |= IXGBE_SDP1_GPIEN_8259X | IXGBE_SDP2_GPIEN_8259X;
5159 break;
5160 case ixgbe_mac_X550EM_x:
5161 gpie |= IXGBE_SDP0_GPIEN_X540;
5162 break;
5163 default:
5164 break;
5165 }
5166
5167 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
5168 }
5169
5170 static void ixgbe_up_complete(struct ixgbe_adapter *adapter)
5171 {
5172 struct ixgbe_hw *hw = &adapter->hw;
5173 int err;
5174 u32 ctrl_ext;
5175
5176 ixgbe_get_hw_control(adapter);
5177 ixgbe_setup_gpie(adapter);
5178
5179 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
5180 ixgbe_configure_msix(adapter);
5181 else
5182 ixgbe_configure_msi_and_legacy(adapter);
5183
5184 /* enable the optics for 82599 SFP+ fiber */
5185 if (hw->mac.ops.enable_tx_laser)
5186 hw->mac.ops.enable_tx_laser(hw);
5187
5188 if (hw->phy.ops.set_phy_power)
5189 hw->phy.ops.set_phy_power(hw, true);
5190
5191 smp_mb__before_atomic();
5192 clear_bit(__IXGBE_DOWN, &adapter->state);
5193 ixgbe_napi_enable_all(adapter);
5194
5195 if (ixgbe_is_sfp(hw)) {
5196 ixgbe_sfp_link_config(adapter);
5197 } else {
5198 err = ixgbe_non_sfp_link_config(hw);
5199 if (err)
5200 e_err(probe, "link_config FAILED %d\n", err);
5201 }
5202
5203 /* clear any pending interrupts, may auto mask */
5204 IXGBE_READ_REG(hw, IXGBE_EICR);
5205 ixgbe_irq_enable(adapter, true, true);
5206
5207 /*
5208 * If this adapter has a fan, check to see if we had a failure
5209 * before we enabled the interrupt.
5210 */
5211 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
5212 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
5213 if (esdp & IXGBE_ESDP_SDP1)
5214 e_crit(drv, "Fan has stopped, replace the adapter\n");
5215 }
5216
5217 /* bring the link up in the watchdog, this could race with our first
5218 * link up interrupt but shouldn't be a problem */
5219 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
5220 adapter->link_check_timeout = jiffies;
5221 mod_timer(&adapter->service_timer, jiffies);
5222
5223 /* Set PF Reset Done bit so PF/VF Mail Ops can work */
5224 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
5225 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
5226 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
5227 }
5228
5229 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
5230 {
5231 WARN_ON(in_interrupt());
5232 /* put off any impending NetWatchDogTimeout */
5233 adapter->netdev->trans_start = jiffies;
5234
5235 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
5236 usleep_range(1000, 2000);
5237 ixgbe_down(adapter);
5238 /*
5239 * If SR-IOV enabled then wait a bit before bringing the adapter
5240 * back up to give the VFs time to respond to the reset. The
5241 * two second wait is based upon the watchdog timer cycle in
5242 * the VF driver.
5243 */
5244 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
5245 msleep(2000);
5246 ixgbe_up(adapter);
5247 clear_bit(__IXGBE_RESETTING, &adapter->state);
5248 }
5249
5250 void ixgbe_up(struct ixgbe_adapter *adapter)
5251 {
5252 /* hardware has been reset, we need to reload some things */
5253 ixgbe_configure(adapter);
5254
5255 ixgbe_up_complete(adapter);
5256 }
5257
5258 void ixgbe_reset(struct ixgbe_adapter *adapter)
5259 {
5260 struct ixgbe_hw *hw = &adapter->hw;
5261 struct net_device *netdev = adapter->netdev;
5262 int err;
5263
5264 if (ixgbe_removed(hw->hw_addr))
5265 return;
5266 /* lock SFP init bit to prevent race conditions with the watchdog */
5267 while (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
5268 usleep_range(1000, 2000);
5269
5270 /* clear all SFP and link config related flags while holding SFP_INIT */
5271 adapter->flags2 &= ~(IXGBE_FLAG2_SEARCH_FOR_SFP |
5272 IXGBE_FLAG2_SFP_NEEDS_RESET);
5273 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
5274
5275 err = hw->mac.ops.init_hw(hw);
5276 switch (err) {
5277 case 0:
5278 case IXGBE_ERR_SFP_NOT_PRESENT:
5279 case IXGBE_ERR_SFP_NOT_SUPPORTED:
5280 break;
5281 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
5282 e_dev_err("master disable timed out\n");
5283 break;
5284 case IXGBE_ERR_EEPROM_VERSION:
5285 /* We are running on a pre-production device, log a warning */
5286 e_dev_warn("This device is a pre-production adapter/LOM. "
5287 "Please be aware there may be issues associated with "
5288 "your hardware. If you are experiencing problems "
5289 "please contact your Intel or hardware "
5290 "representative who provided you with this "
5291 "hardware.\n");
5292 break;
5293 default:
5294 e_dev_err("Hardware Error: %d\n", err);
5295 }
5296
5297 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
5298
5299 /* flush entries out of MAC table */
5300 ixgbe_flush_sw_mac_table(adapter);
5301 __dev_uc_unsync(netdev, NULL);
5302
5303 /* do not flush user set addresses */
5304 ixgbe_mac_set_default_filter(adapter);
5305
5306 /* update SAN MAC vmdq pool selection */
5307 if (hw->mac.san_mac_rar_index)
5308 hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));
5309
5310 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
5311 ixgbe_ptp_reset(adapter);
5312
5313 if (hw->phy.ops.set_phy_power) {
5314 if (!netif_running(adapter->netdev) && !adapter->wol)
5315 hw->phy.ops.set_phy_power(hw, false);
5316 else
5317 hw->phy.ops.set_phy_power(hw, true);
5318 }
5319 }
5320
5321 /**
5322 * ixgbe_clean_tx_ring - Free Tx Buffers
5323 * @tx_ring: ring to be cleaned
5324 **/
5325 static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
5326 {
5327 struct ixgbe_tx_buffer *tx_buffer_info;
5328 unsigned long size;
5329 u16 i;
5330
5331 /* ring already cleared, nothing to do */
5332 if (!tx_ring->tx_buffer_info)
5333 return;
5334
5335 /* Free all the Tx ring sk_buffs */
5336 for (i = 0; i < tx_ring->count; i++) {
5337 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5338 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
5339 }
5340
5341 netdev_tx_reset_queue(txring_txq(tx_ring));
5342
5343 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
5344 memset(tx_ring->tx_buffer_info, 0, size);
5345
5346 /* Zero out the descriptor ring */
5347 memset(tx_ring->desc, 0, tx_ring->size);
5348
5349 tx_ring->next_to_use = 0;
5350 tx_ring->next_to_clean = 0;
5351 }
5352
5353 /**
5354 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
5355 * @adapter: board private structure
5356 **/
5357 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
5358 {
5359 int i;
5360
5361 for (i = 0; i < adapter->num_rx_queues; i++)
5362 ixgbe_clean_rx_ring(adapter->rx_ring[i]);
5363 }
5364
5365 /**
5366 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
5367 * @adapter: board private structure
5368 **/
5369 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
5370 {
5371 int i;
5372
5373 for (i = 0; i < adapter->num_tx_queues; i++)
5374 ixgbe_clean_tx_ring(adapter->tx_ring[i]);
5375 }
5376
5377 static void ixgbe_fdir_filter_exit(struct ixgbe_adapter *adapter)
5378 {
5379 struct hlist_node *node2;
5380 struct ixgbe_fdir_filter *filter;
5381
5382 spin_lock(&adapter->fdir_perfect_lock);
5383
5384 hlist_for_each_entry_safe(filter, node2,
5385 &adapter->fdir_filter_list, fdir_node) {
5386 hlist_del(&filter->fdir_node);
5387 kfree(filter);
5388 }
5389 adapter->fdir_filter_count = 0;
5390
5391 spin_unlock(&adapter->fdir_perfect_lock);
5392 }
5393
5394 void ixgbe_down(struct ixgbe_adapter *adapter)
5395 {
5396 struct net_device *netdev = adapter->netdev;
5397 struct ixgbe_hw *hw = &adapter->hw;
5398 struct net_device *upper;
5399 struct list_head *iter;
5400 int i;
5401
5402 /* signal that we are down to the interrupt handler */
5403 if (test_and_set_bit(__IXGBE_DOWN, &adapter->state))
5404 return; /* do nothing if already down */
5405
5406 /* disable receives */
5407 hw->mac.ops.disable_rx(hw);
5408
5409 /* disable all enabled rx queues */
5410 for (i = 0; i < adapter->num_rx_queues; i++)
5411 /* this call also flushes the previous write */
5412 ixgbe_disable_rx_queue(adapter, adapter->rx_ring[i]);
5413
5414 usleep_range(10000, 20000);
5415
5416 netif_tx_stop_all_queues(netdev);
5417
5418 /* call carrier off first to avoid false dev_watchdog timeouts */
5419 netif_carrier_off(netdev);
5420 netif_tx_disable(netdev);
5421
5422 /* disable any upper devices */
5423 netdev_for_each_all_upper_dev_rcu(adapter->netdev, upper, iter) {
5424 if (netif_is_macvlan(upper)) {
5425 struct macvlan_dev *vlan = netdev_priv(upper);
5426
5427 if (vlan->fwd_priv) {
5428 netif_tx_stop_all_queues(upper);
5429 netif_carrier_off(upper);
5430 netif_tx_disable(upper);
5431 }
5432 }
5433 }
5434
5435 ixgbe_irq_disable(adapter);
5436
5437 ixgbe_napi_disable_all(adapter);
5438
5439 adapter->flags2 &= ~(IXGBE_FLAG2_FDIR_REQUIRES_REINIT |
5440 IXGBE_FLAG2_RESET_REQUESTED);
5441 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5442
5443 del_timer_sync(&adapter->service_timer);
5444
5445 if (adapter->num_vfs) {
5446 /* Clear EITR Select mapping */
5447 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
5448
5449 /* Mark all the VFs as inactive */
5450 for (i = 0 ; i < adapter->num_vfs; i++)
5451 adapter->vfinfo[i].clear_to_send = false;
5452
5453 /* ping all the active vfs to let them know we are going down */
5454 ixgbe_ping_all_vfs(adapter);
5455
5456 /* Disable all VFTE/VFRE TX/RX */
5457 ixgbe_disable_tx_rx(adapter);
5458 }
5459
5460 /* disable transmits in the hardware now that interrupts are off */
5461 for (i = 0; i < adapter->num_tx_queues; i++) {
5462 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
5463 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
5464 }
5465
5466 /* Disable the Tx DMA engine on 82599 and later MAC */
5467 switch (hw->mac.type) {
5468 case ixgbe_mac_82599EB:
5469 case ixgbe_mac_X540:
5470 case ixgbe_mac_X550:
5471 case ixgbe_mac_X550EM_x:
5472 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
5473 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
5474 ~IXGBE_DMATXCTL_TE));
5475 break;
5476 default:
5477 break;
5478 }
5479
5480 if (!pci_channel_offline(adapter->pdev))
5481 ixgbe_reset(adapter);
5482
5483 /* power down the optics for 82599 SFP+ fiber */
5484 if (hw->mac.ops.disable_tx_laser)
5485 hw->mac.ops.disable_tx_laser(hw);
5486
5487 ixgbe_clean_all_tx_rings(adapter);
5488 ixgbe_clean_all_rx_rings(adapter);
5489 }
5490
5491 /**
5492 * ixgbe_tx_timeout - Respond to a Tx Hang
5493 * @netdev: network interface device structure
5494 **/
5495 static void ixgbe_tx_timeout(struct net_device *netdev)
5496 {
5497 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5498
5499 /* Do the reset outside of interrupt context */
5500 ixgbe_tx_timeout_reset(adapter);
5501 }
5502
5503 /**
5504 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
5505 * @adapter: board private structure to initialize
5506 *
5507 * ixgbe_sw_init initializes the Adapter private data structure.
5508 * Fields are initialized based on PCI device information and
5509 * OS network device settings (MTU size).
5510 **/
5511 static int ixgbe_sw_init(struct ixgbe_adapter *adapter)
5512 {
5513 struct ixgbe_hw *hw = &adapter->hw;
5514 struct pci_dev *pdev = adapter->pdev;
5515 unsigned int rss, fdir;
5516 u32 fwsm;
5517 #ifdef CONFIG_IXGBE_DCB
5518 int j;
5519 struct tc_configuration *tc;
5520 #endif
5521
5522 /* PCI config space info */
5523
5524 hw->vendor_id = pdev->vendor;
5525 hw->device_id = pdev->device;
5526 hw->revision_id = pdev->revision;
5527 hw->subsystem_vendor_id = pdev->subsystem_vendor;
5528 hw->subsystem_device_id = pdev->subsystem_device;
5529
5530 /* Set common capability flags and settings */
5531 rss = min_t(int, ixgbe_max_rss_indices(adapter), num_online_cpus());
5532 adapter->ring_feature[RING_F_RSS].limit = rss;
5533 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
5534 adapter->max_q_vectors = MAX_Q_VECTORS_82599;
5535 adapter->atr_sample_rate = 20;
5536 fdir = min_t(int, IXGBE_MAX_FDIR_INDICES, num_online_cpus());
5537 adapter->ring_feature[RING_F_FDIR].limit = fdir;
5538 adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_64K;
5539 #ifdef CONFIG_IXGBE_DCA
5540 adapter->flags |= IXGBE_FLAG_DCA_CAPABLE;
5541 #endif
5542 #ifdef IXGBE_FCOE
5543 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
5544 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
5545 #ifdef CONFIG_IXGBE_DCB
5546 /* Default traffic class to use for FCoE */
5547 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
5548 #endif /* CONFIG_IXGBE_DCB */
5549 #endif /* IXGBE_FCOE */
5550
5551 /* initialize static ixgbe jump table entries */
5552 adapter->jump_tables[0] = ixgbe_ipv4_fields;
5553
5554 adapter->mac_table = kzalloc(sizeof(struct ixgbe_mac_addr) *
5555 hw->mac.num_rar_entries,
5556 GFP_ATOMIC);
5557 if (!adapter->mac_table)
5558 return -ENOMEM;
5559
5560 /* Set MAC specific capability flags and exceptions */
5561 switch (hw->mac.type) {
5562 case ixgbe_mac_82598EB:
5563 adapter->flags2 &= ~IXGBE_FLAG2_RSC_CAPABLE;
5564
5565 if (hw->device_id == IXGBE_DEV_ID_82598AT)
5566 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
5567
5568 adapter->max_q_vectors = MAX_Q_VECTORS_82598;
5569 adapter->ring_feature[RING_F_FDIR].limit = 0;
5570 adapter->atr_sample_rate = 0;
5571 adapter->fdir_pballoc = 0;
5572 #ifdef IXGBE_FCOE
5573 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
5574 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
5575 #ifdef CONFIG_IXGBE_DCB
5576 adapter->fcoe.up = 0;
5577 #endif /* IXGBE_DCB */
5578 #endif /* IXGBE_FCOE */
5579 break;
5580 case ixgbe_mac_82599EB:
5581 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
5582 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
5583 break;
5584 case ixgbe_mac_X540:
5585 fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM(hw));
5586 if (fwsm & IXGBE_FWSM_TS_ENABLED)
5587 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
5588 break;
5589 case ixgbe_mac_X550EM_x:
5590 case ixgbe_mac_X550:
5591 #ifdef CONFIG_IXGBE_DCA
5592 adapter->flags &= ~IXGBE_FLAG_DCA_CAPABLE;
5593 #endif
5594 #ifdef CONFIG_IXGBE_VXLAN
5595 adapter->flags |= IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE;
5596 #endif
5597 break;
5598 default:
5599 break;
5600 }
5601
5602 #ifdef IXGBE_FCOE
5603 /* FCoE support exists, always init the FCoE lock */
5604 spin_lock_init(&adapter->fcoe.lock);
5605
5606 #endif
5607 /* n-tuple support exists, always init our spinlock */
5608 spin_lock_init(&adapter->fdir_perfect_lock);
5609
5610 #ifdef CONFIG_IXGBE_DCB
5611 switch (hw->mac.type) {
5612 case ixgbe_mac_X540:
5613 case ixgbe_mac_X550:
5614 case ixgbe_mac_X550EM_x:
5615 adapter->dcb_cfg.num_tcs.pg_tcs = X540_TRAFFIC_CLASS;
5616 adapter->dcb_cfg.num_tcs.pfc_tcs = X540_TRAFFIC_CLASS;
5617 break;
5618 default:
5619 adapter->dcb_cfg.num_tcs.pg_tcs = MAX_TRAFFIC_CLASS;
5620 adapter->dcb_cfg.num_tcs.pfc_tcs = MAX_TRAFFIC_CLASS;
5621 break;
5622 }
5623
5624 /* Configure DCB traffic classes */
5625 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
5626 tc = &adapter->dcb_cfg.tc_config[j];
5627 tc->path[DCB_TX_CONFIG].bwg_id = 0;
5628 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
5629 tc->path[DCB_RX_CONFIG].bwg_id = 0;
5630 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
5631 tc->dcb_pfc = pfc_disabled;
5632 }
5633
5634 /* Initialize default user to priority mapping, UPx->TC0 */
5635 tc = &adapter->dcb_cfg.tc_config[0];
5636 tc->path[DCB_TX_CONFIG].up_to_tc_bitmap = 0xFF;
5637 tc->path[DCB_RX_CONFIG].up_to_tc_bitmap = 0xFF;
5638
5639 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
5640 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
5641 adapter->dcb_cfg.pfc_mode_enable = false;
5642 adapter->dcb_set_bitmap = 0x00;
5643 adapter->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE;
5644 memcpy(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
5645 sizeof(adapter->temp_dcb_cfg));
5646
5647 #endif
5648
5649 /* default flow control settings */
5650 hw->fc.requested_mode = ixgbe_fc_full;
5651 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
5652 ixgbe_pbthresh_setup(adapter);
5653 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
5654 hw->fc.send_xon = true;
5655 hw->fc.disable_fc_autoneg = ixgbe_device_supports_autoneg_fc(hw);
5656
5657 #ifdef CONFIG_PCI_IOV
5658 if (max_vfs > 0)
5659 e_dev_warn("Enabling SR-IOV VFs using the max_vfs module parameter is deprecated - please use the pci sysfs interface instead.\n");
5660
5661 /* assign number of SR-IOV VFs */
5662 if (hw->mac.type != ixgbe_mac_82598EB) {
5663 if (max_vfs > IXGBE_MAX_VFS_DRV_LIMIT) {
5664 adapter->num_vfs = 0;
5665 e_dev_warn("max_vfs parameter out of range. Not assigning any SR-IOV VFs\n");
5666 } else {
5667 adapter->num_vfs = max_vfs;
5668 }
5669 }
5670 #endif /* CONFIG_PCI_IOV */
5671
5672 /* enable itr by default in dynamic mode */
5673 adapter->rx_itr_setting = 1;
5674 adapter->tx_itr_setting = 1;
5675
5676 /* set default ring sizes */
5677 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
5678 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
5679
5680 /* set default work limits */
5681 adapter->tx_work_limit = IXGBE_DEFAULT_TX_WORK;
5682
5683 /* initialize eeprom parameters */
5684 if (ixgbe_init_eeprom_params_generic(hw)) {
5685 e_dev_err("EEPROM initialization failed\n");
5686 return -EIO;
5687 }
5688
5689 /* PF holds first pool slot */
5690 set_bit(0, &adapter->fwd_bitmask);
5691 set_bit(__IXGBE_DOWN, &adapter->state);
5692
5693 return 0;
5694 }
5695
5696 /**
5697 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
5698 * @tx_ring: tx descriptor ring (for a specific queue) to setup
5699 *
5700 * Return 0 on success, negative on failure
5701 **/
5702 int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
5703 {
5704 struct device *dev = tx_ring->dev;
5705 int orig_node = dev_to_node(dev);
5706 int ring_node = -1;
5707 int size;
5708
5709 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
5710
5711 if (tx_ring->q_vector)
5712 ring_node = tx_ring->q_vector->numa_node;
5713
5714 tx_ring->tx_buffer_info = vzalloc_node(size, ring_node);
5715 if (!tx_ring->tx_buffer_info)
5716 tx_ring->tx_buffer_info = vzalloc(size);
5717 if (!tx_ring->tx_buffer_info)
5718 goto err;
5719
5720 u64_stats_init(&tx_ring->syncp);
5721
5722 /* round up to nearest 4K */
5723 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
5724 tx_ring->size = ALIGN(tx_ring->size, 4096);
5725
5726 set_dev_node(dev, ring_node);
5727 tx_ring->desc = dma_alloc_coherent(dev,
5728 tx_ring->size,
5729 &tx_ring->dma,
5730 GFP_KERNEL);
5731 set_dev_node(dev, orig_node);
5732 if (!tx_ring->desc)
5733 tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
5734 &tx_ring->dma, GFP_KERNEL);
5735 if (!tx_ring->desc)
5736 goto err;
5737
5738 tx_ring->next_to_use = 0;
5739 tx_ring->next_to_clean = 0;
5740 return 0;
5741
5742 err:
5743 vfree(tx_ring->tx_buffer_info);
5744 tx_ring->tx_buffer_info = NULL;
5745 dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n");
5746 return -ENOMEM;
5747 }
5748
5749 /**
5750 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
5751 * @adapter: board private structure
5752 *
5753 * If this function returns with an error, then it's possible one or
5754 * more of the rings is populated (while the rest are not). It is the
5755 * callers duty to clean those orphaned rings.
5756 *
5757 * Return 0 on success, negative on failure
5758 **/
5759 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
5760 {
5761 int i, err = 0;
5762
5763 for (i = 0; i < adapter->num_tx_queues; i++) {
5764 err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
5765 if (!err)
5766 continue;
5767
5768 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
5769 goto err_setup_tx;
5770 }
5771
5772 return 0;
5773 err_setup_tx:
5774 /* rewind the index freeing the rings as we go */
5775 while (i--)
5776 ixgbe_free_tx_resources(adapter->tx_ring[i]);
5777 return err;
5778 }
5779
5780 /**
5781 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
5782 * @rx_ring: rx descriptor ring (for a specific queue) to setup
5783 *
5784 * Returns 0 on success, negative on failure
5785 **/
5786 int ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring)
5787 {
5788 struct device *dev = rx_ring->dev;
5789 int orig_node = dev_to_node(dev);
5790 int ring_node = -1;
5791 int size;
5792
5793 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
5794
5795 if (rx_ring->q_vector)
5796 ring_node = rx_ring->q_vector->numa_node;
5797
5798 rx_ring->rx_buffer_info = vzalloc_node(size, ring_node);
5799 if (!rx_ring->rx_buffer_info)
5800 rx_ring->rx_buffer_info = vzalloc(size);
5801 if (!rx_ring->rx_buffer_info)
5802 goto err;
5803
5804 u64_stats_init(&rx_ring->syncp);
5805
5806 /* Round up to nearest 4K */
5807 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
5808 rx_ring->size = ALIGN(rx_ring->size, 4096);
5809
5810 set_dev_node(dev, ring_node);
5811 rx_ring->desc = dma_alloc_coherent(dev,
5812 rx_ring->size,
5813 &rx_ring->dma,
5814 GFP_KERNEL);
5815 set_dev_node(dev, orig_node);
5816 if (!rx_ring->desc)
5817 rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
5818 &rx_ring->dma, GFP_KERNEL);
5819 if (!rx_ring->desc)
5820 goto err;
5821
5822 rx_ring->next_to_clean = 0;
5823 rx_ring->next_to_use = 0;
5824
5825 return 0;
5826 err:
5827 vfree(rx_ring->rx_buffer_info);
5828 rx_ring->rx_buffer_info = NULL;
5829 dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");
5830 return -ENOMEM;
5831 }
5832
5833 /**
5834 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
5835 * @adapter: board private structure
5836 *
5837 * If this function returns with an error, then it's possible one or
5838 * more of the rings is populated (while the rest are not). It is the
5839 * callers duty to clean those orphaned rings.
5840 *
5841 * Return 0 on success, negative on failure
5842 **/
5843 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
5844 {
5845 int i, err = 0;
5846
5847 for (i = 0; i < adapter->num_rx_queues; i++) {
5848 err = ixgbe_setup_rx_resources(adapter->rx_ring[i]);
5849 if (!err)
5850 continue;
5851
5852 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
5853 goto err_setup_rx;
5854 }
5855
5856 #ifdef IXGBE_FCOE
5857 err = ixgbe_setup_fcoe_ddp_resources(adapter);
5858 if (!err)
5859 #endif
5860 return 0;
5861 err_setup_rx:
5862 /* rewind the index freeing the rings as we go */
5863 while (i--)
5864 ixgbe_free_rx_resources(adapter->rx_ring[i]);
5865 return err;
5866 }
5867
5868 /**
5869 * ixgbe_free_tx_resources - Free Tx Resources per Queue
5870 * @tx_ring: Tx descriptor ring for a specific queue
5871 *
5872 * Free all transmit software resources
5873 **/
5874 void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring)
5875 {
5876 ixgbe_clean_tx_ring(tx_ring);
5877
5878 vfree(tx_ring->tx_buffer_info);
5879 tx_ring->tx_buffer_info = NULL;
5880
5881 /* if not set, then don't free */
5882 if (!tx_ring->desc)
5883 return;
5884
5885 dma_free_coherent(tx_ring->dev, tx_ring->size,
5886 tx_ring->desc, tx_ring->dma);
5887
5888 tx_ring->desc = NULL;
5889 }
5890
5891 /**
5892 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
5893 * @adapter: board private structure
5894 *
5895 * Free all transmit software resources
5896 **/
5897 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
5898 {
5899 int i;
5900
5901 for (i = 0; i < adapter->num_tx_queues; i++)
5902 if (adapter->tx_ring[i]->desc)
5903 ixgbe_free_tx_resources(adapter->tx_ring[i]);
5904 }
5905
5906 /**
5907 * ixgbe_free_rx_resources - Free Rx Resources
5908 * @rx_ring: ring to clean the resources from
5909 *
5910 * Free all receive software resources
5911 **/
5912 void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring)
5913 {
5914 ixgbe_clean_rx_ring(rx_ring);
5915
5916 vfree(rx_ring->rx_buffer_info);
5917 rx_ring->rx_buffer_info = NULL;
5918
5919 /* if not set, then don't free */
5920 if (!rx_ring->desc)
5921 return;
5922
5923 dma_free_coherent(rx_ring->dev, rx_ring->size,
5924 rx_ring->desc, rx_ring->dma);
5925
5926 rx_ring->desc = NULL;
5927 }
5928
5929 /**
5930 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
5931 * @adapter: board private structure
5932 *
5933 * Free all receive software resources
5934 **/
5935 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
5936 {
5937 int i;
5938
5939 #ifdef IXGBE_FCOE
5940 ixgbe_free_fcoe_ddp_resources(adapter);
5941
5942 #endif
5943 for (i = 0; i < adapter->num_rx_queues; i++)
5944 if (adapter->rx_ring[i]->desc)
5945 ixgbe_free_rx_resources(adapter->rx_ring[i]);
5946 }
5947
5948 /**
5949 * ixgbe_change_mtu - Change the Maximum Transfer Unit
5950 * @netdev: network interface device structure
5951 * @new_mtu: new value for maximum frame size
5952 *
5953 * Returns 0 on success, negative on failure
5954 **/
5955 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
5956 {
5957 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5958 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5959
5960 /* MTU < 68 is an error and causes problems on some kernels */
5961 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
5962 return -EINVAL;
5963
5964 /*
5965 * For 82599EB we cannot allow legacy VFs to enable their receive
5966 * paths when MTU greater than 1500 is configured. So display a
5967 * warning that legacy VFs will be disabled.
5968 */
5969 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) &&
5970 (adapter->hw.mac.type == ixgbe_mac_82599EB) &&
5971 (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)))
5972 e_warn(probe, "Setting MTU > 1500 will disable legacy VFs\n");
5973
5974 e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5975
5976 /* must set new MTU before calling down or up */
5977 netdev->mtu = new_mtu;
5978
5979 if (netif_running(netdev))
5980 ixgbe_reinit_locked(adapter);
5981
5982 return 0;
5983 }
5984
5985 /**
5986 * ixgbe_open - Called when a network interface is made active
5987 * @netdev: network interface device structure
5988 *
5989 * Returns 0 on success, negative value on failure
5990 *
5991 * The open entry point is called when a network interface is made
5992 * active by the system (IFF_UP). At this point all resources needed
5993 * for transmit and receive operations are allocated, the interrupt
5994 * handler is registered with the OS, the watchdog timer is started,
5995 * and the stack is notified that the interface is ready.
5996 **/
5997 static int ixgbe_open(struct net_device *netdev)
5998 {
5999 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6000 struct ixgbe_hw *hw = &adapter->hw;
6001 int err, queues;
6002
6003 /* disallow open during test */
6004 if (test_bit(__IXGBE_TESTING, &adapter->state))
6005 return -EBUSY;
6006
6007 netif_carrier_off(netdev);
6008
6009 /* allocate transmit descriptors */
6010 err = ixgbe_setup_all_tx_resources(adapter);
6011 if (err)
6012 goto err_setup_tx;
6013
6014 /* allocate receive descriptors */
6015 err = ixgbe_setup_all_rx_resources(adapter);
6016 if (err)
6017 goto err_setup_rx;
6018
6019 ixgbe_configure(adapter);
6020
6021 err = ixgbe_request_irq(adapter);
6022 if (err)
6023 goto err_req_irq;
6024
6025 /* Notify the stack of the actual queue counts. */
6026 if (adapter->num_rx_pools > 1)
6027 queues = adapter->num_rx_queues_per_pool;
6028 else
6029 queues = adapter->num_tx_queues;
6030
6031 err = netif_set_real_num_tx_queues(netdev, queues);
6032 if (err)
6033 goto err_set_queues;
6034
6035 if (adapter->num_rx_pools > 1 &&
6036 adapter->num_rx_queues > IXGBE_MAX_L2A_QUEUES)
6037 queues = IXGBE_MAX_L2A_QUEUES;
6038 else
6039 queues = adapter->num_rx_queues;
6040 err = netif_set_real_num_rx_queues(netdev, queues);
6041 if (err)
6042 goto err_set_queues;
6043
6044 ixgbe_ptp_init(adapter);
6045
6046 ixgbe_up_complete(adapter);
6047
6048 ixgbe_clear_vxlan_port(adapter);
6049 #ifdef CONFIG_IXGBE_VXLAN
6050 vxlan_get_rx_port(netdev);
6051 #endif
6052
6053 return 0;
6054
6055 err_set_queues:
6056 ixgbe_free_irq(adapter);
6057 err_req_irq:
6058 ixgbe_free_all_rx_resources(adapter);
6059 if (hw->phy.ops.set_phy_power && !adapter->wol)
6060 hw->phy.ops.set_phy_power(&adapter->hw, false);
6061 err_setup_rx:
6062 ixgbe_free_all_tx_resources(adapter);
6063 err_setup_tx:
6064 ixgbe_reset(adapter);
6065
6066 return err;
6067 }
6068
6069 static void ixgbe_close_suspend(struct ixgbe_adapter *adapter)
6070 {
6071 ixgbe_ptp_suspend(adapter);
6072
6073 if (adapter->hw.phy.ops.enter_lplu) {
6074 adapter->hw.phy.reset_disable = true;
6075 ixgbe_down(adapter);
6076 adapter->hw.phy.ops.enter_lplu(&adapter->hw);
6077 adapter->hw.phy.reset_disable = false;
6078 } else {
6079 ixgbe_down(adapter);
6080 }
6081
6082 ixgbe_free_irq(adapter);
6083
6084 ixgbe_free_all_tx_resources(adapter);
6085 ixgbe_free_all_rx_resources(adapter);
6086 }
6087
6088 /**
6089 * ixgbe_close - Disables a network interface
6090 * @netdev: network interface device structure
6091 *
6092 * Returns 0, this is not allowed to fail
6093 *
6094 * The close entry point is called when an interface is de-activated
6095 * by the OS. The hardware is still under the drivers control, but
6096 * needs to be disabled. A global MAC reset is issued to stop the
6097 * hardware, and all transmit and receive resources are freed.
6098 **/
6099 static int ixgbe_close(struct net_device *netdev)
6100 {
6101 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6102
6103 ixgbe_ptp_stop(adapter);
6104
6105 ixgbe_close_suspend(adapter);
6106
6107 ixgbe_fdir_filter_exit(adapter);
6108
6109 ixgbe_release_hw_control(adapter);
6110
6111 return 0;
6112 }
6113
6114 #ifdef CONFIG_PM
6115 static int ixgbe_resume(struct pci_dev *pdev)
6116 {
6117 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
6118 struct net_device *netdev = adapter->netdev;
6119 u32 err;
6120
6121 adapter->hw.hw_addr = adapter->io_addr;
6122 pci_set_power_state(pdev, PCI_D0);
6123 pci_restore_state(pdev);
6124 /*
6125 * pci_restore_state clears dev->state_saved so call
6126 * pci_save_state to restore it.
6127 */
6128 pci_save_state(pdev);
6129
6130 err = pci_enable_device_mem(pdev);
6131 if (err) {
6132 e_dev_err("Cannot enable PCI device from suspend\n");
6133 return err;
6134 }
6135 smp_mb__before_atomic();
6136 clear_bit(__IXGBE_DISABLED, &adapter->state);
6137 pci_set_master(pdev);
6138
6139 pci_wake_from_d3(pdev, false);
6140
6141 ixgbe_reset(adapter);
6142
6143 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
6144
6145 rtnl_lock();
6146 err = ixgbe_init_interrupt_scheme(adapter);
6147 if (!err && netif_running(netdev))
6148 err = ixgbe_open(netdev);
6149
6150 rtnl_unlock();
6151
6152 if (err)
6153 return err;
6154
6155 netif_device_attach(netdev);
6156
6157 return 0;
6158 }
6159 #endif /* CONFIG_PM */
6160
6161 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
6162 {
6163 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
6164 struct net_device *netdev = adapter->netdev;
6165 struct ixgbe_hw *hw = &adapter->hw;
6166 u32 ctrl, fctrl;
6167 u32 wufc = adapter->wol;
6168 #ifdef CONFIG_PM
6169 int retval = 0;
6170 #endif
6171
6172 netif_device_detach(netdev);
6173
6174 rtnl_lock();
6175 if (netif_running(netdev))
6176 ixgbe_close_suspend(adapter);
6177 rtnl_unlock();
6178
6179 ixgbe_clear_interrupt_scheme(adapter);
6180
6181 #ifdef CONFIG_PM
6182 retval = pci_save_state(pdev);
6183 if (retval)
6184 return retval;
6185
6186 #endif
6187 if (hw->mac.ops.stop_link_on_d3)
6188 hw->mac.ops.stop_link_on_d3(hw);
6189
6190 if (wufc) {
6191 ixgbe_set_rx_mode(netdev);
6192
6193 /* enable the optics for 82599 SFP+ fiber as we can WoL */
6194 if (hw->mac.ops.enable_tx_laser)
6195 hw->mac.ops.enable_tx_laser(hw);
6196
6197 /* turn on all-multi mode if wake on multicast is enabled */
6198 if (wufc & IXGBE_WUFC_MC) {
6199 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
6200 fctrl |= IXGBE_FCTRL_MPE;
6201 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
6202 }
6203
6204 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
6205 ctrl |= IXGBE_CTRL_GIO_DIS;
6206 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
6207
6208 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
6209 } else {
6210 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
6211 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
6212 }
6213
6214 switch (hw->mac.type) {
6215 case ixgbe_mac_82598EB:
6216 pci_wake_from_d3(pdev, false);
6217 break;
6218 case ixgbe_mac_82599EB:
6219 case ixgbe_mac_X540:
6220 case ixgbe_mac_X550:
6221 case ixgbe_mac_X550EM_x:
6222 pci_wake_from_d3(pdev, !!wufc);
6223 break;
6224 default:
6225 break;
6226 }
6227
6228 *enable_wake = !!wufc;
6229 if (hw->phy.ops.set_phy_power && !*enable_wake)
6230 hw->phy.ops.set_phy_power(hw, false);
6231
6232 ixgbe_release_hw_control(adapter);
6233
6234 if (!test_and_set_bit(__IXGBE_DISABLED, &adapter->state))
6235 pci_disable_device(pdev);
6236
6237 return 0;
6238 }
6239
6240 #ifdef CONFIG_PM
6241 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
6242 {
6243 int retval;
6244 bool wake;
6245
6246 retval = __ixgbe_shutdown(pdev, &wake);
6247 if (retval)
6248 return retval;
6249
6250 if (wake) {
6251 pci_prepare_to_sleep(pdev);
6252 } else {
6253 pci_wake_from_d3(pdev, false);
6254 pci_set_power_state(pdev, PCI_D3hot);
6255 }
6256
6257 return 0;
6258 }
6259 #endif /* CONFIG_PM */
6260
6261 static void ixgbe_shutdown(struct pci_dev *pdev)
6262 {
6263 bool wake;
6264
6265 __ixgbe_shutdown(pdev, &wake);
6266
6267 if (system_state == SYSTEM_POWER_OFF) {
6268 pci_wake_from_d3(pdev, wake);
6269 pci_set_power_state(pdev, PCI_D3hot);
6270 }
6271 }
6272
6273 /**
6274 * ixgbe_update_stats - Update the board statistics counters.
6275 * @adapter: board private structure
6276 **/
6277 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
6278 {
6279 struct net_device *netdev = adapter->netdev;
6280 struct ixgbe_hw *hw = &adapter->hw;
6281 struct ixgbe_hw_stats *hwstats = &adapter->stats;
6282 u64 total_mpc = 0;
6283 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
6284 u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
6285 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
6286 u64 bytes = 0, packets = 0, hw_csum_rx_error = 0;
6287
6288 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6289 test_bit(__IXGBE_RESETTING, &adapter->state))
6290 return;
6291
6292 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
6293 u64 rsc_count = 0;
6294 u64 rsc_flush = 0;
6295 for (i = 0; i < adapter->num_rx_queues; i++) {
6296 rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
6297 rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
6298 }
6299 adapter->rsc_total_count = rsc_count;
6300 adapter->rsc_total_flush = rsc_flush;
6301 }
6302
6303 for (i = 0; i < adapter->num_rx_queues; i++) {
6304 struct ixgbe_ring *rx_ring = adapter->rx_ring[i];
6305 non_eop_descs += rx_ring->rx_stats.non_eop_descs;
6306 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
6307 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
6308 hw_csum_rx_error += rx_ring->rx_stats.csum_err;
6309 bytes += rx_ring->stats.bytes;
6310 packets += rx_ring->stats.packets;
6311 }
6312 adapter->non_eop_descs = non_eop_descs;
6313 adapter->alloc_rx_page_failed = alloc_rx_page_failed;
6314 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
6315 adapter->hw_csum_rx_error = hw_csum_rx_error;
6316 netdev->stats.rx_bytes = bytes;
6317 netdev->stats.rx_packets = packets;
6318
6319 bytes = 0;
6320 packets = 0;
6321 /* gather some stats to the adapter struct that are per queue */
6322 for (i = 0; i < adapter->num_tx_queues; i++) {
6323 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
6324 restart_queue += tx_ring->tx_stats.restart_queue;
6325 tx_busy += tx_ring->tx_stats.tx_busy;
6326 bytes += tx_ring->stats.bytes;
6327 packets += tx_ring->stats.packets;
6328 }
6329 adapter->restart_queue = restart_queue;
6330 adapter->tx_busy = tx_busy;
6331 netdev->stats.tx_bytes = bytes;
6332 netdev->stats.tx_packets = packets;
6333
6334 hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
6335
6336 /* 8 register reads */
6337 for (i = 0; i < 8; i++) {
6338 /* for packet buffers not used, the register should read 0 */
6339 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
6340 missed_rx += mpc;
6341 hwstats->mpc[i] += mpc;
6342 total_mpc += hwstats->mpc[i];
6343 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
6344 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
6345 switch (hw->mac.type) {
6346 case ixgbe_mac_82598EB:
6347 hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
6348 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
6349 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
6350 hwstats->pxonrxc[i] +=
6351 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
6352 break;
6353 case ixgbe_mac_82599EB:
6354 case ixgbe_mac_X540:
6355 case ixgbe_mac_X550:
6356 case ixgbe_mac_X550EM_x:
6357 hwstats->pxonrxc[i] +=
6358 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
6359 break;
6360 default:
6361 break;
6362 }
6363 }
6364
6365 /*16 register reads */
6366 for (i = 0; i < 16; i++) {
6367 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
6368 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
6369 if ((hw->mac.type == ixgbe_mac_82599EB) ||
6370 (hw->mac.type == ixgbe_mac_X540) ||
6371 (hw->mac.type == ixgbe_mac_X550) ||
6372 (hw->mac.type == ixgbe_mac_X550EM_x)) {
6373 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
6374 IXGBE_READ_REG(hw, IXGBE_QBTC_H(i)); /* to clear */
6375 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC_L(i));
6376 IXGBE_READ_REG(hw, IXGBE_QBRC_H(i)); /* to clear */
6377 }
6378 }
6379
6380 hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
6381 /* work around hardware counting issue */
6382 hwstats->gprc -= missed_rx;
6383
6384 ixgbe_update_xoff_received(adapter);
6385
6386 /* 82598 hardware only has a 32 bit counter in the high register */
6387 switch (hw->mac.type) {
6388 case ixgbe_mac_82598EB:
6389 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
6390 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
6391 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
6392 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
6393 break;
6394 case ixgbe_mac_X540:
6395 case ixgbe_mac_X550:
6396 case ixgbe_mac_X550EM_x:
6397 /* OS2BMC stats are X540 and later */
6398 hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC);
6399 hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC);
6400 hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC);
6401 hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC);
6402 case ixgbe_mac_82599EB:
6403 for (i = 0; i < 16; i++)
6404 adapter->hw_rx_no_dma_resources +=
6405 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
6406 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
6407 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
6408 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
6409 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
6410 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
6411 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
6412 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
6413 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
6414 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
6415 #ifdef IXGBE_FCOE
6416 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
6417 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
6418 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
6419 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
6420 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
6421 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
6422 /* Add up per cpu counters for total ddp aloc fail */
6423 if (adapter->fcoe.ddp_pool) {
6424 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
6425 struct ixgbe_fcoe_ddp_pool *ddp_pool;
6426 unsigned int cpu;
6427 u64 noddp = 0, noddp_ext_buff = 0;
6428 for_each_possible_cpu(cpu) {
6429 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
6430 noddp += ddp_pool->noddp;
6431 noddp_ext_buff += ddp_pool->noddp_ext_buff;
6432 }
6433 hwstats->fcoe_noddp = noddp;
6434 hwstats->fcoe_noddp_ext_buff = noddp_ext_buff;
6435 }
6436 #endif /* IXGBE_FCOE */
6437 break;
6438 default:
6439 break;
6440 }
6441 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
6442 hwstats->bprc += bprc;
6443 hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
6444 if (hw->mac.type == ixgbe_mac_82598EB)
6445 hwstats->mprc -= bprc;
6446 hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
6447 hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
6448 hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
6449 hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
6450 hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
6451 hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
6452 hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
6453 hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
6454 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
6455 hwstats->lxontxc += lxon;
6456 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
6457 hwstats->lxofftxc += lxoff;
6458 hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
6459 hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
6460 /*
6461 * 82598 errata - tx of flow control packets is included in tx counters
6462 */
6463 xon_off_tot = lxon + lxoff;
6464 hwstats->gptc -= xon_off_tot;
6465 hwstats->mptc -= xon_off_tot;
6466 hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
6467 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
6468 hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
6469 hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
6470 hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
6471 hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
6472 hwstats->ptc64 -= xon_off_tot;
6473 hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
6474 hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
6475 hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
6476 hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
6477 hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
6478 hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
6479
6480 /* Fill out the OS statistics structure */
6481 netdev->stats.multicast = hwstats->mprc;
6482
6483 /* Rx Errors */
6484 netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
6485 netdev->stats.rx_dropped = 0;
6486 netdev->stats.rx_length_errors = hwstats->rlec;
6487 netdev->stats.rx_crc_errors = hwstats->crcerrs;
6488 netdev->stats.rx_missed_errors = total_mpc;
6489 }
6490
6491 /**
6492 * ixgbe_fdir_reinit_subtask - worker thread to reinit FDIR filter table
6493 * @adapter: pointer to the device adapter structure
6494 **/
6495 static void ixgbe_fdir_reinit_subtask(struct ixgbe_adapter *adapter)
6496 {
6497 struct ixgbe_hw *hw = &adapter->hw;
6498 int i;
6499
6500 if (!(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
6501 return;
6502
6503 adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
6504
6505 /* if interface is down do nothing */
6506 if (test_bit(__IXGBE_DOWN, &adapter->state))
6507 return;
6508
6509 /* do nothing if we are not using signature filters */
6510 if (!(adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE))
6511 return;
6512
6513 adapter->fdir_overflow++;
6514
6515 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
6516 for (i = 0; i < adapter->num_tx_queues; i++)
6517 set_bit(__IXGBE_TX_FDIR_INIT_DONE,
6518 &(adapter->tx_ring[i]->state));
6519 /* re-enable flow director interrupts */
6520 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
6521 } else {
6522 e_err(probe, "failed to finish FDIR re-initialization, "
6523 "ignored adding FDIR ATR filters\n");
6524 }
6525 }
6526
6527 /**
6528 * ixgbe_check_hang_subtask - check for hung queues and dropped interrupts
6529 * @adapter: pointer to the device adapter structure
6530 *
6531 * This function serves two purposes. First it strobes the interrupt lines
6532 * in order to make certain interrupts are occurring. Secondly it sets the
6533 * bits needed to check for TX hangs. As a result we should immediately
6534 * determine if a hang has occurred.
6535 */
6536 static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter)
6537 {
6538 struct ixgbe_hw *hw = &adapter->hw;
6539 u64 eics = 0;
6540 int i;
6541
6542 /* If we're down, removing or resetting, just bail */
6543 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6544 test_bit(__IXGBE_REMOVING, &adapter->state) ||
6545 test_bit(__IXGBE_RESETTING, &adapter->state))
6546 return;
6547
6548 /* Force detection of hung controller */
6549 if (netif_carrier_ok(adapter->netdev)) {
6550 for (i = 0; i < adapter->num_tx_queues; i++)
6551 set_check_for_tx_hang(adapter->tx_ring[i]);
6552 }
6553
6554 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
6555 /*
6556 * for legacy and MSI interrupts don't set any bits
6557 * that are enabled for EIAM, because this operation
6558 * would set *both* EIMS and EICS for any bit in EIAM
6559 */
6560 IXGBE_WRITE_REG(hw, IXGBE_EICS,
6561 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
6562 } else {
6563 /* get one bit for every active tx/rx interrupt vector */
6564 for (i = 0; i < adapter->num_q_vectors; i++) {
6565 struct ixgbe_q_vector *qv = adapter->q_vector[i];
6566 if (qv->rx.ring || qv->tx.ring)
6567 eics |= ((u64)1 << i);
6568 }
6569 }
6570
6571 /* Cause software interrupt to ensure rings are cleaned */
6572 ixgbe_irq_rearm_queues(adapter, eics);
6573 }
6574
6575 /**
6576 * ixgbe_watchdog_update_link - update the link status
6577 * @adapter: pointer to the device adapter structure
6578 * @link_speed: pointer to a u32 to store the link_speed
6579 **/
6580 static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter)
6581 {
6582 struct ixgbe_hw *hw = &adapter->hw;
6583 u32 link_speed = adapter->link_speed;
6584 bool link_up = adapter->link_up;
6585 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
6586
6587 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
6588 return;
6589
6590 if (hw->mac.ops.check_link) {
6591 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
6592 } else {
6593 /* always assume link is up, if no check link function */
6594 link_speed = IXGBE_LINK_SPEED_10GB_FULL;
6595 link_up = true;
6596 }
6597
6598 if (adapter->ixgbe_ieee_pfc)
6599 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
6600
6601 if (link_up && !((adapter->flags & IXGBE_FLAG_DCB_ENABLED) && pfc_en)) {
6602 hw->mac.ops.fc_enable(hw);
6603 ixgbe_set_rx_drop_en(adapter);
6604 }
6605
6606 if (link_up ||
6607 time_after(jiffies, (adapter->link_check_timeout +
6608 IXGBE_TRY_LINK_TIMEOUT))) {
6609 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
6610 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
6611 IXGBE_WRITE_FLUSH(hw);
6612 }
6613
6614 adapter->link_up = link_up;
6615 adapter->link_speed = link_speed;
6616 }
6617
6618 static void ixgbe_update_default_up(struct ixgbe_adapter *adapter)
6619 {
6620 #ifdef CONFIG_IXGBE_DCB
6621 struct net_device *netdev = adapter->netdev;
6622 struct dcb_app app = {
6623 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE,
6624 .protocol = 0,
6625 };
6626 u8 up = 0;
6627
6628 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE)
6629 up = dcb_ieee_getapp_mask(netdev, &app);
6630
6631 adapter->default_up = (up > 1) ? (ffs(up) - 1) : 0;
6632 #endif
6633 }
6634
6635 /**
6636 * ixgbe_watchdog_link_is_up - update netif_carrier status and
6637 * print link up message
6638 * @adapter: pointer to the device adapter structure
6639 **/
6640 static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
6641 {
6642 struct net_device *netdev = adapter->netdev;
6643 struct ixgbe_hw *hw = &adapter->hw;
6644 struct net_device *upper;
6645 struct list_head *iter;
6646 u32 link_speed = adapter->link_speed;
6647 const char *speed_str;
6648 bool flow_rx, flow_tx;
6649
6650 /* only continue if link was previously down */
6651 if (netif_carrier_ok(netdev))
6652 return;
6653
6654 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
6655
6656 switch (hw->mac.type) {
6657 case ixgbe_mac_82598EB: {
6658 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
6659 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
6660 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
6661 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
6662 }
6663 break;
6664 case ixgbe_mac_X540:
6665 case ixgbe_mac_X550:
6666 case ixgbe_mac_X550EM_x:
6667 case ixgbe_mac_82599EB: {
6668 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
6669 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
6670 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
6671 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
6672 }
6673 break;
6674 default:
6675 flow_tx = false;
6676 flow_rx = false;
6677 break;
6678 }
6679
6680 adapter->last_rx_ptp_check = jiffies;
6681
6682 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
6683 ixgbe_ptp_start_cyclecounter(adapter);
6684
6685 switch (link_speed) {
6686 case IXGBE_LINK_SPEED_10GB_FULL:
6687 speed_str = "10 Gbps";
6688 break;
6689 case IXGBE_LINK_SPEED_2_5GB_FULL:
6690 speed_str = "2.5 Gbps";
6691 break;
6692 case IXGBE_LINK_SPEED_1GB_FULL:
6693 speed_str = "1 Gbps";
6694 break;
6695 case IXGBE_LINK_SPEED_100_FULL:
6696 speed_str = "100 Mbps";
6697 break;
6698 default:
6699 speed_str = "unknown speed";
6700 break;
6701 }
6702 e_info(drv, "NIC Link is Up %s, Flow Control: %s\n", speed_str,
6703 ((flow_rx && flow_tx) ? "RX/TX" :
6704 (flow_rx ? "RX" :
6705 (flow_tx ? "TX" : "None"))));
6706
6707 netif_carrier_on(netdev);
6708 ixgbe_check_vf_rate_limit(adapter);
6709
6710 /* enable transmits */
6711 netif_tx_wake_all_queues(adapter->netdev);
6712
6713 /* enable any upper devices */
6714 rtnl_lock();
6715 netdev_for_each_all_upper_dev_rcu(adapter->netdev, upper, iter) {
6716 if (netif_is_macvlan(upper)) {
6717 struct macvlan_dev *vlan = netdev_priv(upper);
6718
6719 if (vlan->fwd_priv)
6720 netif_tx_wake_all_queues(upper);
6721 }
6722 }
6723 rtnl_unlock();
6724
6725 /* update the default user priority for VFs */
6726 ixgbe_update_default_up(adapter);
6727
6728 /* ping all the active vfs to let them know link has changed */
6729 ixgbe_ping_all_vfs(adapter);
6730 }
6731
6732 /**
6733 * ixgbe_watchdog_link_is_down - update netif_carrier status and
6734 * print link down message
6735 * @adapter: pointer to the adapter structure
6736 **/
6737 static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter *adapter)
6738 {
6739 struct net_device *netdev = adapter->netdev;
6740 struct ixgbe_hw *hw = &adapter->hw;
6741
6742 adapter->link_up = false;
6743 adapter->link_speed = 0;
6744
6745 /* only continue if link was up previously */
6746 if (!netif_carrier_ok(netdev))
6747 return;
6748
6749 /* poll for SFP+ cable when link is down */
6750 if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB)
6751 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
6752
6753 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
6754 ixgbe_ptp_start_cyclecounter(adapter);
6755
6756 e_info(drv, "NIC Link is Down\n");
6757 netif_carrier_off(netdev);
6758
6759 /* ping all the active vfs to let them know link has changed */
6760 ixgbe_ping_all_vfs(adapter);
6761 }
6762
6763 static bool ixgbe_ring_tx_pending(struct ixgbe_adapter *adapter)
6764 {
6765 int i;
6766
6767 for (i = 0; i < adapter->num_tx_queues; i++) {
6768 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
6769
6770 if (tx_ring->next_to_use != tx_ring->next_to_clean)
6771 return true;
6772 }
6773
6774 return false;
6775 }
6776
6777 static bool ixgbe_vf_tx_pending(struct ixgbe_adapter *adapter)
6778 {
6779 struct ixgbe_hw *hw = &adapter->hw;
6780 struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ];
6781 u32 q_per_pool = __ALIGN_MASK(1, ~vmdq->mask);
6782
6783 int i, j;
6784
6785 if (!adapter->num_vfs)
6786 return false;
6787
6788 /* resetting the PF is only needed for MAC before X550 */
6789 if (hw->mac.type >= ixgbe_mac_X550)
6790 return false;
6791
6792 for (i = 0; i < adapter->num_vfs; i++) {
6793 for (j = 0; j < q_per_pool; j++) {
6794 u32 h, t;
6795
6796 h = IXGBE_READ_REG(hw, IXGBE_PVFTDHN(q_per_pool, i, j));
6797 t = IXGBE_READ_REG(hw, IXGBE_PVFTDTN(q_per_pool, i, j));
6798
6799 if (h != t)
6800 return true;
6801 }
6802 }
6803
6804 return false;
6805 }
6806
6807 /**
6808 * ixgbe_watchdog_flush_tx - flush queues on link down
6809 * @adapter: pointer to the device adapter structure
6810 **/
6811 static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter)
6812 {
6813 if (!netif_carrier_ok(adapter->netdev)) {
6814 if (ixgbe_ring_tx_pending(adapter) ||
6815 ixgbe_vf_tx_pending(adapter)) {
6816 /* We've lost link, so the controller stops DMA,
6817 * but we've got queued Tx work that's never going
6818 * to get done, so reset controller to flush Tx.
6819 * (Do the reset outside of interrupt context).
6820 */
6821 e_warn(drv, "initiating reset to clear Tx work after link loss\n");
6822 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
6823 }
6824 }
6825 }
6826
6827 #ifdef CONFIG_PCI_IOV
6828 static inline void ixgbe_issue_vf_flr(struct ixgbe_adapter *adapter,
6829 struct pci_dev *vfdev)
6830 {
6831 if (!pci_wait_for_pending_transaction(vfdev))
6832 e_dev_warn("Issuing VFLR with pending transactions\n");
6833
6834 e_dev_err("Issuing VFLR for VF %s\n", pci_name(vfdev));
6835 pcie_capability_set_word(vfdev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR);
6836
6837 msleep(100);
6838 }
6839
6840 static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter)
6841 {
6842 struct ixgbe_hw *hw = &adapter->hw;
6843 struct pci_dev *pdev = adapter->pdev;
6844 unsigned int vf;
6845 u32 gpc;
6846
6847 if (!(netif_carrier_ok(adapter->netdev)))
6848 return;
6849
6850 gpc = IXGBE_READ_REG(hw, IXGBE_TXDGPC);
6851 if (gpc) /* If incrementing then no need for the check below */
6852 return;
6853 /* Check to see if a bad DMA write target from an errant or
6854 * malicious VF has caused a PCIe error. If so then we can
6855 * issue a VFLR to the offending VF(s) and then resume without
6856 * requesting a full slot reset.
6857 */
6858
6859 if (!pdev)
6860 return;
6861
6862 /* check status reg for all VFs owned by this PF */
6863 for (vf = 0; vf < adapter->num_vfs; ++vf) {
6864 struct pci_dev *vfdev = adapter->vfinfo[vf].vfdev;
6865 u16 status_reg;
6866
6867 if (!vfdev)
6868 continue;
6869 pci_read_config_word(vfdev, PCI_STATUS, &status_reg);
6870 if (status_reg != IXGBE_FAILED_READ_CFG_WORD &&
6871 status_reg & PCI_STATUS_REC_MASTER_ABORT)
6872 ixgbe_issue_vf_flr(adapter, vfdev);
6873 }
6874 }
6875
6876 static void ixgbe_spoof_check(struct ixgbe_adapter *adapter)
6877 {
6878 u32 ssvpc;
6879
6880 /* Do not perform spoof check for 82598 or if not in IOV mode */
6881 if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
6882 adapter->num_vfs == 0)
6883 return;
6884
6885 ssvpc = IXGBE_READ_REG(&adapter->hw, IXGBE_SSVPC);
6886
6887 /*
6888 * ssvpc register is cleared on read, if zero then no
6889 * spoofed packets in the last interval.
6890 */
6891 if (!ssvpc)
6892 return;
6893
6894 e_warn(drv, "%u Spoofed packets detected\n", ssvpc);
6895 }
6896 #else
6897 static void ixgbe_spoof_check(struct ixgbe_adapter __always_unused *adapter)
6898 {
6899 }
6900
6901 static void
6902 ixgbe_check_for_bad_vf(struct ixgbe_adapter __always_unused *adapter)
6903 {
6904 }
6905 #endif /* CONFIG_PCI_IOV */
6906
6907
6908 /**
6909 * ixgbe_watchdog_subtask - check and bring link up
6910 * @adapter: pointer to the device adapter structure
6911 **/
6912 static void ixgbe_watchdog_subtask(struct ixgbe_adapter *adapter)
6913 {
6914 /* if interface is down, removing or resetting, do nothing */
6915 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6916 test_bit(__IXGBE_REMOVING, &adapter->state) ||
6917 test_bit(__IXGBE_RESETTING, &adapter->state))
6918 return;
6919
6920 ixgbe_watchdog_update_link(adapter);
6921
6922 if (adapter->link_up)
6923 ixgbe_watchdog_link_is_up(adapter);
6924 else
6925 ixgbe_watchdog_link_is_down(adapter);
6926
6927 ixgbe_check_for_bad_vf(adapter);
6928 ixgbe_spoof_check(adapter);
6929 ixgbe_update_stats(adapter);
6930
6931 ixgbe_watchdog_flush_tx(adapter);
6932 }
6933
6934 /**
6935 * ixgbe_sfp_detection_subtask - poll for SFP+ cable
6936 * @adapter: the ixgbe adapter structure
6937 **/
6938 static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter)
6939 {
6940 struct ixgbe_hw *hw = &adapter->hw;
6941 s32 err;
6942
6943 /* not searching for SFP so there is nothing to do here */
6944 if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) &&
6945 !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
6946 return;
6947
6948 if (adapter->sfp_poll_time &&
6949 time_after(adapter->sfp_poll_time, jiffies))
6950 return; /* If not yet time to poll for SFP */
6951
6952 /* someone else is in init, wait until next service event */
6953 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
6954 return;
6955
6956 adapter->sfp_poll_time = jiffies + IXGBE_SFP_POLL_JIFFIES - 1;
6957
6958 err = hw->phy.ops.identify_sfp(hw);
6959 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
6960 goto sfp_out;
6961
6962 if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
6963 /* If no cable is present, then we need to reset
6964 * the next time we find a good cable. */
6965 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
6966 }
6967
6968 /* exit on error */
6969 if (err)
6970 goto sfp_out;
6971
6972 /* exit if reset not needed */
6973 if (!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
6974 goto sfp_out;
6975
6976 adapter->flags2 &= ~IXGBE_FLAG2_SFP_NEEDS_RESET;
6977
6978 /*
6979 * A module may be identified correctly, but the EEPROM may not have
6980 * support for that module. setup_sfp() will fail in that case, so
6981 * we should not allow that module to load.
6982 */
6983 if (hw->mac.type == ixgbe_mac_82598EB)
6984 err = hw->phy.ops.reset(hw);
6985 else
6986 err = hw->mac.ops.setup_sfp(hw);
6987
6988 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
6989 goto sfp_out;
6990
6991 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
6992 e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
6993
6994 sfp_out:
6995 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
6996
6997 if ((err == IXGBE_ERR_SFP_NOT_SUPPORTED) &&
6998 (adapter->netdev->reg_state == NETREG_REGISTERED)) {
6999 e_dev_err("failed to initialize because an unsupported "
7000 "SFP+ module type was detected.\n");
7001 e_dev_err("Reload the driver after installing a "
7002 "supported module.\n");
7003 unregister_netdev(adapter->netdev);
7004 }
7005 }
7006
7007 /**
7008 * ixgbe_sfp_link_config_subtask - set up link SFP after module install
7009 * @adapter: the ixgbe adapter structure
7010 **/
7011 static void ixgbe_sfp_link_config_subtask(struct ixgbe_adapter *adapter)
7012 {
7013 struct ixgbe_hw *hw = &adapter->hw;
7014 u32 speed;
7015 bool autoneg = false;
7016
7017 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_CONFIG))
7018 return;
7019
7020 /* someone else is in init, wait until next service event */
7021 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
7022 return;
7023
7024 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
7025
7026 speed = hw->phy.autoneg_advertised;
7027 if ((!speed) && (hw->mac.ops.get_link_capabilities)) {
7028 hw->mac.ops.get_link_capabilities(hw, &speed, &autoneg);
7029
7030 /* setup the highest link when no autoneg */
7031 if (!autoneg) {
7032 if (speed & IXGBE_LINK_SPEED_10GB_FULL)
7033 speed = IXGBE_LINK_SPEED_10GB_FULL;
7034 }
7035 }
7036
7037 if (hw->mac.ops.setup_link)
7038 hw->mac.ops.setup_link(hw, speed, true);
7039
7040 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
7041 adapter->link_check_timeout = jiffies;
7042 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
7043 }
7044
7045 /**
7046 * ixgbe_service_timer - Timer Call-back
7047 * @data: pointer to adapter cast into an unsigned long
7048 **/
7049 static void ixgbe_service_timer(unsigned long data)
7050 {
7051 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
7052 unsigned long next_event_offset;
7053
7054 /* poll faster when waiting for link */
7055 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
7056 next_event_offset = HZ / 10;
7057 else
7058 next_event_offset = HZ * 2;
7059
7060 /* Reset the timer */
7061 mod_timer(&adapter->service_timer, next_event_offset + jiffies);
7062
7063 ixgbe_service_event_schedule(adapter);
7064 }
7065
7066 static void ixgbe_phy_interrupt_subtask(struct ixgbe_adapter *adapter)
7067 {
7068 struct ixgbe_hw *hw = &adapter->hw;
7069 u32 status;
7070
7071 if (!(adapter->flags2 & IXGBE_FLAG2_PHY_INTERRUPT))
7072 return;
7073
7074 adapter->flags2 &= ~IXGBE_FLAG2_PHY_INTERRUPT;
7075
7076 if (!hw->phy.ops.handle_lasi)
7077 return;
7078
7079 status = hw->phy.ops.handle_lasi(&adapter->hw);
7080 if (status != IXGBE_ERR_OVERTEMP)
7081 return;
7082
7083 e_crit(drv, "%s\n", ixgbe_overheat_msg);
7084 }
7085
7086 static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter)
7087 {
7088 if (!(adapter->flags2 & IXGBE_FLAG2_RESET_REQUESTED))
7089 return;
7090
7091 adapter->flags2 &= ~IXGBE_FLAG2_RESET_REQUESTED;
7092
7093 /* If we're already down, removing or resetting, just bail */
7094 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
7095 test_bit(__IXGBE_REMOVING, &adapter->state) ||
7096 test_bit(__IXGBE_RESETTING, &adapter->state))
7097 return;
7098
7099 ixgbe_dump(adapter);
7100 netdev_err(adapter->netdev, "Reset adapter\n");
7101 adapter->tx_timeout_count++;
7102
7103 rtnl_lock();
7104 ixgbe_reinit_locked(adapter);
7105 rtnl_unlock();
7106 }
7107
7108 /**
7109 * ixgbe_service_task - manages and runs subtasks
7110 * @work: pointer to work_struct containing our data
7111 **/
7112 static void ixgbe_service_task(struct work_struct *work)
7113 {
7114 struct ixgbe_adapter *adapter = container_of(work,
7115 struct ixgbe_adapter,
7116 service_task);
7117 if (ixgbe_removed(adapter->hw.hw_addr)) {
7118 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
7119 rtnl_lock();
7120 ixgbe_down(adapter);
7121 rtnl_unlock();
7122 }
7123 ixgbe_service_event_complete(adapter);
7124 return;
7125 }
7126 #ifdef CONFIG_IXGBE_VXLAN
7127 if (adapter->flags2 & IXGBE_FLAG2_VXLAN_REREG_NEEDED) {
7128 adapter->flags2 &= ~IXGBE_FLAG2_VXLAN_REREG_NEEDED;
7129 vxlan_get_rx_port(adapter->netdev);
7130 }
7131 #endif /* CONFIG_IXGBE_VXLAN */
7132 ixgbe_reset_subtask(adapter);
7133 ixgbe_phy_interrupt_subtask(adapter);
7134 ixgbe_sfp_detection_subtask(adapter);
7135 ixgbe_sfp_link_config_subtask(adapter);
7136 ixgbe_check_overtemp_subtask(adapter);
7137 ixgbe_watchdog_subtask(adapter);
7138 ixgbe_fdir_reinit_subtask(adapter);
7139 ixgbe_check_hang_subtask(adapter);
7140
7141 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state)) {
7142 ixgbe_ptp_overflow_check(adapter);
7143 ixgbe_ptp_rx_hang(adapter);
7144 }
7145
7146 ixgbe_service_event_complete(adapter);
7147 }
7148
7149 static int ixgbe_tso(struct ixgbe_ring *tx_ring,
7150 struct ixgbe_tx_buffer *first,
7151 u8 *hdr_len)
7152 {
7153 struct sk_buff *skb = first->skb;
7154 u32 vlan_macip_lens, type_tucmd;
7155 u32 mss_l4len_idx, l4len;
7156 int err;
7157
7158 if (skb->ip_summed != CHECKSUM_PARTIAL)
7159 return 0;
7160
7161 if (!skb_is_gso(skb))
7162 return 0;
7163
7164 err = skb_cow_head(skb, 0);
7165 if (err < 0)
7166 return err;
7167
7168 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
7169 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
7170
7171 if (first->protocol == htons(ETH_P_IP)) {
7172 struct iphdr *iph = ip_hdr(skb);
7173 iph->tot_len = 0;
7174 iph->check = 0;
7175 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
7176 iph->daddr, 0,
7177 IPPROTO_TCP,
7178 0);
7179 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
7180 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
7181 IXGBE_TX_FLAGS_CSUM |
7182 IXGBE_TX_FLAGS_IPV4;
7183 } else if (skb_is_gso_v6(skb)) {
7184 ipv6_hdr(skb)->payload_len = 0;
7185 tcp_hdr(skb)->check =
7186 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
7187 &ipv6_hdr(skb)->daddr,
7188 0, IPPROTO_TCP, 0);
7189 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
7190 IXGBE_TX_FLAGS_CSUM;
7191 }
7192
7193 /* compute header lengths */
7194 l4len = tcp_hdrlen(skb);
7195 *hdr_len = skb_transport_offset(skb) + l4len;
7196
7197 /* update gso size and bytecount with header size */
7198 first->gso_segs = skb_shinfo(skb)->gso_segs;
7199 first->bytecount += (first->gso_segs - 1) * *hdr_len;
7200
7201 /* mss_l4len_id: use 0 as index for TSO */
7202 mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
7203 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
7204
7205 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
7206 vlan_macip_lens = skb_network_header_len(skb);
7207 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
7208 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
7209
7210 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, type_tucmd,
7211 mss_l4len_idx);
7212
7213 return 1;
7214 }
7215
7216 static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
7217 struct ixgbe_tx_buffer *first)
7218 {
7219 struct sk_buff *skb = first->skb;
7220 u32 vlan_macip_lens = 0;
7221 u32 mss_l4len_idx = 0;
7222 u32 type_tucmd = 0;
7223
7224 if (skb->ip_summed != CHECKSUM_PARTIAL) {
7225 if (!(first->tx_flags & IXGBE_TX_FLAGS_HW_VLAN) &&
7226 !(first->tx_flags & IXGBE_TX_FLAGS_CC))
7227 return;
7228 vlan_macip_lens = skb_network_offset(skb) <<
7229 IXGBE_ADVTXD_MACLEN_SHIFT;
7230 } else {
7231 u8 l4_hdr = 0;
7232 union {
7233 struct iphdr *ipv4;
7234 struct ipv6hdr *ipv6;
7235 u8 *raw;
7236 } network_hdr;
7237 union {
7238 struct tcphdr *tcphdr;
7239 u8 *raw;
7240 } transport_hdr;
7241 __be16 frag_off;
7242
7243 if (skb->encapsulation) {
7244 network_hdr.raw = skb_inner_network_header(skb);
7245 transport_hdr.raw = skb_inner_transport_header(skb);
7246 vlan_macip_lens = skb_inner_network_offset(skb) <<
7247 IXGBE_ADVTXD_MACLEN_SHIFT;
7248 } else {
7249 network_hdr.raw = skb_network_header(skb);
7250 transport_hdr.raw = skb_transport_header(skb);
7251 vlan_macip_lens = skb_network_offset(skb) <<
7252 IXGBE_ADVTXD_MACLEN_SHIFT;
7253 }
7254
7255 /* use first 4 bits to determine IP version */
7256 switch (network_hdr.ipv4->version) {
7257 case IPVERSION:
7258 vlan_macip_lens |= transport_hdr.raw - network_hdr.raw;
7259 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
7260 l4_hdr = network_hdr.ipv4->protocol;
7261 break;
7262 case 6:
7263 vlan_macip_lens |= transport_hdr.raw - network_hdr.raw;
7264 l4_hdr = network_hdr.ipv6->nexthdr;
7265 if (likely((transport_hdr.raw - network_hdr.raw) ==
7266 sizeof(struct ipv6hdr)))
7267 break;
7268 ipv6_skip_exthdr(skb, network_hdr.raw - skb->data +
7269 sizeof(struct ipv6hdr),
7270 &l4_hdr, &frag_off);
7271 if (unlikely(frag_off))
7272 l4_hdr = NEXTHDR_FRAGMENT;
7273 break;
7274 default:
7275 break;
7276 }
7277
7278 switch (l4_hdr) {
7279 case IPPROTO_TCP:
7280 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
7281 mss_l4len_idx = (transport_hdr.tcphdr->doff * 4) <<
7282 IXGBE_ADVTXD_L4LEN_SHIFT;
7283 break;
7284 case IPPROTO_SCTP:
7285 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
7286 mss_l4len_idx = sizeof(struct sctphdr) <<
7287 IXGBE_ADVTXD_L4LEN_SHIFT;
7288 break;
7289 case IPPROTO_UDP:
7290 mss_l4len_idx = sizeof(struct udphdr) <<
7291 IXGBE_ADVTXD_L4LEN_SHIFT;
7292 break;
7293 default:
7294 if (unlikely(net_ratelimit())) {
7295 dev_warn(tx_ring->dev,
7296 "partial checksum, version=%d, l4 proto=%x\n",
7297 network_hdr.ipv4->version, l4_hdr);
7298 }
7299 skb_checksum_help(skb);
7300 goto no_csum;
7301 }
7302
7303 /* update TX checksum flag */
7304 first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
7305 }
7306
7307 no_csum:
7308 /* vlan_macip_lens: MACLEN, VLAN tag */
7309 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
7310
7311 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0,
7312 type_tucmd, mss_l4len_idx);
7313 }
7314
7315 #define IXGBE_SET_FLAG(_input, _flag, _result) \
7316 ((_flag <= _result) ? \
7317 ((u32)(_input & _flag) * (_result / _flag)) : \
7318 ((u32)(_input & _flag) / (_flag / _result)))
7319
7320 static u32 ixgbe_tx_cmd_type(struct sk_buff *skb, u32 tx_flags)
7321 {
7322 /* set type for advanced descriptor with frame checksum insertion */
7323 u32 cmd_type = IXGBE_ADVTXD_DTYP_DATA |
7324 IXGBE_ADVTXD_DCMD_DEXT |
7325 IXGBE_ADVTXD_DCMD_IFCS;
7326
7327 /* set HW vlan bit if vlan is present */
7328 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_HW_VLAN,
7329 IXGBE_ADVTXD_DCMD_VLE);
7330
7331 /* set segmentation enable bits for TSO/FSO */
7332 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSO,
7333 IXGBE_ADVTXD_DCMD_TSE);
7334
7335 /* set timestamp bit if present */
7336 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSTAMP,
7337 IXGBE_ADVTXD_MAC_TSTAMP);
7338
7339 /* insert frame checksum */
7340 cmd_type ^= IXGBE_SET_FLAG(skb->no_fcs, 1, IXGBE_ADVTXD_DCMD_IFCS);
7341
7342 return cmd_type;
7343 }
7344
7345 static void ixgbe_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
7346 u32 tx_flags, unsigned int paylen)
7347 {
7348 u32 olinfo_status = paylen << IXGBE_ADVTXD_PAYLEN_SHIFT;
7349
7350 /* enable L4 checksum for TSO and TX checksum offload */
7351 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
7352 IXGBE_TX_FLAGS_CSUM,
7353 IXGBE_ADVTXD_POPTS_TXSM);
7354
7355 /* enble IPv4 checksum for TSO */
7356 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
7357 IXGBE_TX_FLAGS_IPV4,
7358 IXGBE_ADVTXD_POPTS_IXSM);
7359
7360 /*
7361 * Check Context must be set if Tx switch is enabled, which it
7362 * always is for case where virtual functions are running
7363 */
7364 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
7365 IXGBE_TX_FLAGS_CC,
7366 IXGBE_ADVTXD_CC);
7367
7368 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
7369 }
7370
7371 static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
7372 {
7373 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
7374
7375 /* Herbert's original patch had:
7376 * smp_mb__after_netif_stop_queue();
7377 * but since that doesn't exist yet, just open code it.
7378 */
7379 smp_mb();
7380
7381 /* We need to check again in a case another CPU has just
7382 * made room available.
7383 */
7384 if (likely(ixgbe_desc_unused(tx_ring) < size))
7385 return -EBUSY;
7386
7387 /* A reprieve! - use start_queue because it doesn't call schedule */
7388 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
7389 ++tx_ring->tx_stats.restart_queue;
7390 return 0;
7391 }
7392
7393 static inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
7394 {
7395 if (likely(ixgbe_desc_unused(tx_ring) >= size))
7396 return 0;
7397
7398 return __ixgbe_maybe_stop_tx(tx_ring, size);
7399 }
7400
7401 #define IXGBE_TXD_CMD (IXGBE_TXD_CMD_EOP | \
7402 IXGBE_TXD_CMD_RS)
7403
7404 static void ixgbe_tx_map(struct ixgbe_ring *tx_ring,
7405 struct ixgbe_tx_buffer *first,
7406 const u8 hdr_len)
7407 {
7408 struct sk_buff *skb = first->skb;
7409 struct ixgbe_tx_buffer *tx_buffer;
7410 union ixgbe_adv_tx_desc *tx_desc;
7411 struct skb_frag_struct *frag;
7412 dma_addr_t dma;
7413 unsigned int data_len, size;
7414 u32 tx_flags = first->tx_flags;
7415 u32 cmd_type = ixgbe_tx_cmd_type(skb, tx_flags);
7416 u16 i = tx_ring->next_to_use;
7417
7418 tx_desc = IXGBE_TX_DESC(tx_ring, i);
7419
7420 ixgbe_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);
7421
7422 size = skb_headlen(skb);
7423 data_len = skb->data_len;
7424
7425 #ifdef IXGBE_FCOE
7426 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
7427 if (data_len < sizeof(struct fcoe_crc_eof)) {
7428 size -= sizeof(struct fcoe_crc_eof) - data_len;
7429 data_len = 0;
7430 } else {
7431 data_len -= sizeof(struct fcoe_crc_eof);
7432 }
7433 }
7434
7435 #endif
7436 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
7437
7438 tx_buffer = first;
7439
7440 for (frag = &skb_shinfo(skb)->frags[0];; frag++) {
7441 if (dma_mapping_error(tx_ring->dev, dma))
7442 goto dma_error;
7443
7444 /* record length, and DMA address */
7445 dma_unmap_len_set(tx_buffer, len, size);
7446 dma_unmap_addr_set(tx_buffer, dma, dma);
7447
7448 tx_desc->read.buffer_addr = cpu_to_le64(dma);
7449
7450 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
7451 tx_desc->read.cmd_type_len =
7452 cpu_to_le32(cmd_type ^ IXGBE_MAX_DATA_PER_TXD);
7453
7454 i++;
7455 tx_desc++;
7456 if (i == tx_ring->count) {
7457 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
7458 i = 0;
7459 }
7460 tx_desc->read.olinfo_status = 0;
7461
7462 dma += IXGBE_MAX_DATA_PER_TXD;
7463 size -= IXGBE_MAX_DATA_PER_TXD;
7464
7465 tx_desc->read.buffer_addr = cpu_to_le64(dma);
7466 }
7467
7468 if (likely(!data_len))
7469 break;
7470
7471 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type ^ size);
7472
7473 i++;
7474 tx_desc++;
7475 if (i == tx_ring->count) {
7476 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
7477 i = 0;
7478 }
7479 tx_desc->read.olinfo_status = 0;
7480
7481 #ifdef IXGBE_FCOE
7482 size = min_t(unsigned int, data_len, skb_frag_size(frag));
7483 #else
7484 size = skb_frag_size(frag);
7485 #endif
7486 data_len -= size;
7487
7488 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
7489 DMA_TO_DEVICE);
7490
7491 tx_buffer = &tx_ring->tx_buffer_info[i];
7492 }
7493
7494 /* write last descriptor with RS and EOP bits */
7495 cmd_type |= size | IXGBE_TXD_CMD;
7496 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
7497
7498 netdev_tx_sent_queue(txring_txq(tx_ring), first->bytecount);
7499
7500 /* set the timestamp */
7501 first->time_stamp = jiffies;
7502
7503 /*
7504 * Force memory writes to complete before letting h/w know there
7505 * are new descriptors to fetch. (Only applicable for weak-ordered
7506 * memory model archs, such as IA-64).
7507 *
7508 * We also need this memory barrier to make certain all of the
7509 * status bits have been updated before next_to_watch is written.
7510 */
7511 wmb();
7512
7513 /* set next_to_watch value indicating a packet is present */
7514 first->next_to_watch = tx_desc;
7515
7516 i++;
7517 if (i == tx_ring->count)
7518 i = 0;
7519
7520 tx_ring->next_to_use = i;
7521
7522 ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);
7523
7524 if (netif_xmit_stopped(txring_txq(tx_ring)) || !skb->xmit_more) {
7525 writel(i, tx_ring->tail);
7526
7527 /* we need this if more than one processor can write to our tail
7528 * at a time, it synchronizes IO on IA64/Altix systems
7529 */
7530 mmiowb();
7531 }
7532
7533 return;
7534 dma_error:
7535 dev_err(tx_ring->dev, "TX DMA map failed\n");
7536
7537 /* clear dma mappings for failed tx_buffer_info map */
7538 for (;;) {
7539 tx_buffer = &tx_ring->tx_buffer_info[i];
7540 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer);
7541 if (tx_buffer == first)
7542 break;
7543 if (i == 0)
7544 i = tx_ring->count;
7545 i--;
7546 }
7547
7548 tx_ring->next_to_use = i;
7549 }
7550
7551 static void ixgbe_atr(struct ixgbe_ring *ring,
7552 struct ixgbe_tx_buffer *first)
7553 {
7554 struct ixgbe_q_vector *q_vector = ring->q_vector;
7555 union ixgbe_atr_hash_dword input = { .dword = 0 };
7556 union ixgbe_atr_hash_dword common = { .dword = 0 };
7557 union {
7558 unsigned char *network;
7559 struct iphdr *ipv4;
7560 struct ipv6hdr *ipv6;
7561 } hdr;
7562 struct tcphdr *th;
7563 struct sk_buff *skb;
7564 #ifdef CONFIG_IXGBE_VXLAN
7565 u8 encap = false;
7566 #endif /* CONFIG_IXGBE_VXLAN */
7567 __be16 vlan_id;
7568
7569 /* if ring doesn't have a interrupt vector, cannot perform ATR */
7570 if (!q_vector)
7571 return;
7572
7573 /* do nothing if sampling is disabled */
7574 if (!ring->atr_sample_rate)
7575 return;
7576
7577 ring->atr_count++;
7578
7579 /* snag network header to get L4 type and address */
7580 skb = first->skb;
7581 hdr.network = skb_network_header(skb);
7582 if (!skb->encapsulation) {
7583 th = tcp_hdr(skb);
7584 } else {
7585 #ifdef CONFIG_IXGBE_VXLAN
7586 struct ixgbe_adapter *adapter = q_vector->adapter;
7587
7588 if (!adapter->vxlan_port)
7589 return;
7590 if (first->protocol != htons(ETH_P_IP) ||
7591 hdr.ipv4->version != IPVERSION ||
7592 hdr.ipv4->protocol != IPPROTO_UDP) {
7593 return;
7594 }
7595 if (ntohs(udp_hdr(skb)->dest) != adapter->vxlan_port)
7596 return;
7597 encap = true;
7598 hdr.network = skb_inner_network_header(skb);
7599 th = inner_tcp_hdr(skb);
7600 #else
7601 return;
7602 #endif /* CONFIG_IXGBE_VXLAN */
7603 }
7604
7605 /* Currently only IPv4/IPv6 with TCP is supported */
7606 switch (hdr.ipv4->version) {
7607 case IPVERSION:
7608 if (hdr.ipv4->protocol != IPPROTO_TCP)
7609 return;
7610 break;
7611 case 6:
7612 if (likely((unsigned char *)th - hdr.network ==
7613 sizeof(struct ipv6hdr))) {
7614 if (hdr.ipv6->nexthdr != IPPROTO_TCP)
7615 return;
7616 } else {
7617 __be16 frag_off;
7618 u8 l4_hdr;
7619
7620 ipv6_skip_exthdr(skb, hdr.network - skb->data +
7621 sizeof(struct ipv6hdr),
7622 &l4_hdr, &frag_off);
7623 if (unlikely(frag_off))
7624 return;
7625 if (l4_hdr != IPPROTO_TCP)
7626 return;
7627 }
7628 break;
7629 default:
7630 return;
7631 }
7632
7633 /* skip this packet since it is invalid or the socket is closing */
7634 if (!th || th->fin)
7635 return;
7636
7637 /* sample on all syn packets or once every atr sample count */
7638 if (!th->syn && (ring->atr_count < ring->atr_sample_rate))
7639 return;
7640
7641 /* reset sample count */
7642 ring->atr_count = 0;
7643
7644 vlan_id = htons(first->tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT);
7645
7646 /*
7647 * src and dst are inverted, think how the receiver sees them
7648 *
7649 * The input is broken into two sections, a non-compressed section
7650 * containing vm_pool, vlan_id, and flow_type. The rest of the data
7651 * is XORed together and stored in the compressed dword.
7652 */
7653 input.formatted.vlan_id = vlan_id;
7654
7655 /*
7656 * since src port and flex bytes occupy the same word XOR them together
7657 * and write the value to source port portion of compressed dword
7658 */
7659 if (first->tx_flags & (IXGBE_TX_FLAGS_SW_VLAN | IXGBE_TX_FLAGS_HW_VLAN))
7660 common.port.src ^= th->dest ^ htons(ETH_P_8021Q);
7661 else
7662 common.port.src ^= th->dest ^ first->protocol;
7663 common.port.dst ^= th->source;
7664
7665 switch (hdr.ipv4->version) {
7666 case IPVERSION:
7667 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4;
7668 common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr;
7669 break;
7670 case 6:
7671 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6;
7672 common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^
7673 hdr.ipv6->saddr.s6_addr32[1] ^
7674 hdr.ipv6->saddr.s6_addr32[2] ^
7675 hdr.ipv6->saddr.s6_addr32[3] ^
7676 hdr.ipv6->daddr.s6_addr32[0] ^
7677 hdr.ipv6->daddr.s6_addr32[1] ^
7678 hdr.ipv6->daddr.s6_addr32[2] ^
7679 hdr.ipv6->daddr.s6_addr32[3];
7680 break;
7681 default:
7682 break;
7683 }
7684
7685 #ifdef CONFIG_IXGBE_VXLAN
7686 if (encap)
7687 input.formatted.flow_type |= IXGBE_ATR_L4TYPE_TUNNEL_MASK;
7688 #endif /* CONFIG_IXGBE_VXLAN */
7689
7690 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
7691 ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw,
7692 input, common, ring->queue_index);
7693 }
7694
7695 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb,
7696 void *accel_priv, select_queue_fallback_t fallback)
7697 {
7698 struct ixgbe_fwd_adapter *fwd_adapter = accel_priv;
7699 #ifdef IXGBE_FCOE
7700 struct ixgbe_adapter *adapter;
7701 struct ixgbe_ring_feature *f;
7702 int txq;
7703 #endif
7704
7705 if (fwd_adapter)
7706 return skb->queue_mapping + fwd_adapter->tx_base_queue;
7707
7708 #ifdef IXGBE_FCOE
7709
7710 /*
7711 * only execute the code below if protocol is FCoE
7712 * or FIP and we have FCoE enabled on the adapter
7713 */
7714 switch (vlan_get_protocol(skb)) {
7715 case htons(ETH_P_FCOE):
7716 case htons(ETH_P_FIP):
7717 adapter = netdev_priv(dev);
7718
7719 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
7720 break;
7721 default:
7722 return fallback(dev, skb);
7723 }
7724
7725 f = &adapter->ring_feature[RING_F_FCOE];
7726
7727 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) :
7728 smp_processor_id();
7729
7730 while (txq >= f->indices)
7731 txq -= f->indices;
7732
7733 return txq + f->offset;
7734 #else
7735 return fallback(dev, skb);
7736 #endif
7737 }
7738
7739 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
7740 struct ixgbe_adapter *adapter,
7741 struct ixgbe_ring *tx_ring)
7742 {
7743 struct ixgbe_tx_buffer *first;
7744 int tso;
7745 u32 tx_flags = 0;
7746 unsigned short f;
7747 u16 count = TXD_USE_COUNT(skb_headlen(skb));
7748 __be16 protocol = skb->protocol;
7749 u8 hdr_len = 0;
7750
7751 /*
7752 * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
7753 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
7754 * + 2 desc gap to keep tail from touching head,
7755 * + 1 desc for context descriptor,
7756 * otherwise try next time
7757 */
7758 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
7759 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
7760
7761 if (ixgbe_maybe_stop_tx(tx_ring, count + 3)) {
7762 tx_ring->tx_stats.tx_busy++;
7763 return NETDEV_TX_BUSY;
7764 }
7765
7766 /* record the location of the first descriptor for this packet */
7767 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
7768 first->skb = skb;
7769 first->bytecount = skb->len;
7770 first->gso_segs = 1;
7771
7772 /* if we have a HW VLAN tag being added default to the HW one */
7773 if (skb_vlan_tag_present(skb)) {
7774 tx_flags |= skb_vlan_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT;
7775 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
7776 /* else if it is a SW VLAN check the next protocol and store the tag */
7777 } else if (protocol == htons(ETH_P_8021Q)) {
7778 struct vlan_hdr *vhdr, _vhdr;
7779 vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(_vhdr), &_vhdr);
7780 if (!vhdr)
7781 goto out_drop;
7782
7783 tx_flags |= ntohs(vhdr->h_vlan_TCI) <<
7784 IXGBE_TX_FLAGS_VLAN_SHIFT;
7785 tx_flags |= IXGBE_TX_FLAGS_SW_VLAN;
7786 }
7787 protocol = vlan_get_protocol(skb);
7788
7789 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
7790 adapter->ptp_clock &&
7791 !test_and_set_bit_lock(__IXGBE_PTP_TX_IN_PROGRESS,
7792 &adapter->state)) {
7793 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
7794 tx_flags |= IXGBE_TX_FLAGS_TSTAMP;
7795
7796 /* schedule check for Tx timestamp */
7797 adapter->ptp_tx_skb = skb_get(skb);
7798 adapter->ptp_tx_start = jiffies;
7799 schedule_work(&adapter->ptp_tx_work);
7800 }
7801
7802 skb_tx_timestamp(skb);
7803
7804 #ifdef CONFIG_PCI_IOV
7805 /*
7806 * Use the l2switch_enable flag - would be false if the DMA
7807 * Tx switch had been disabled.
7808 */
7809 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7810 tx_flags |= IXGBE_TX_FLAGS_CC;
7811
7812 #endif
7813 /* DCB maps skb priorities 0-7 onto 3 bit PCP of VLAN tag. */
7814 if ((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
7815 ((tx_flags & (IXGBE_TX_FLAGS_HW_VLAN | IXGBE_TX_FLAGS_SW_VLAN)) ||
7816 (skb->priority != TC_PRIO_CONTROL))) {
7817 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
7818 tx_flags |= (skb->priority & 0x7) <<
7819 IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT;
7820 if (tx_flags & IXGBE_TX_FLAGS_SW_VLAN) {
7821 struct vlan_ethhdr *vhdr;
7822
7823 if (skb_cow_head(skb, 0))
7824 goto out_drop;
7825 vhdr = (struct vlan_ethhdr *)skb->data;
7826 vhdr->h_vlan_TCI = htons(tx_flags >>
7827 IXGBE_TX_FLAGS_VLAN_SHIFT);
7828 } else {
7829 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
7830 }
7831 }
7832
7833 /* record initial flags and protocol */
7834 first->tx_flags = tx_flags;
7835 first->protocol = protocol;
7836
7837 #ifdef IXGBE_FCOE
7838 /* setup tx offload for FCoE */
7839 if ((protocol == htons(ETH_P_FCOE)) &&
7840 (tx_ring->netdev->features & (NETIF_F_FSO | NETIF_F_FCOE_CRC))) {
7841 tso = ixgbe_fso(tx_ring, first, &hdr_len);
7842 if (tso < 0)
7843 goto out_drop;
7844
7845 goto xmit_fcoe;
7846 }
7847
7848 #endif /* IXGBE_FCOE */
7849 tso = ixgbe_tso(tx_ring, first, &hdr_len);
7850 if (tso < 0)
7851 goto out_drop;
7852 else if (!tso)
7853 ixgbe_tx_csum(tx_ring, first);
7854
7855 /* add the ATR filter if ATR is on */
7856 if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state))
7857 ixgbe_atr(tx_ring, first);
7858
7859 #ifdef IXGBE_FCOE
7860 xmit_fcoe:
7861 #endif /* IXGBE_FCOE */
7862 ixgbe_tx_map(tx_ring, first, hdr_len);
7863
7864 return NETDEV_TX_OK;
7865
7866 out_drop:
7867 dev_kfree_skb_any(first->skb);
7868 first->skb = NULL;
7869
7870 return NETDEV_TX_OK;
7871 }
7872
7873 static netdev_tx_t __ixgbe_xmit_frame(struct sk_buff *skb,
7874 struct net_device *netdev,
7875 struct ixgbe_ring *ring)
7876 {
7877 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7878 struct ixgbe_ring *tx_ring;
7879
7880 /*
7881 * The minimum packet size for olinfo paylen is 17 so pad the skb
7882 * in order to meet this minimum size requirement.
7883 */
7884 if (skb_put_padto(skb, 17))
7885 return NETDEV_TX_OK;
7886
7887 tx_ring = ring ? ring : adapter->tx_ring[skb->queue_mapping];
7888
7889 return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
7890 }
7891
7892 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
7893 struct net_device *netdev)
7894 {
7895 return __ixgbe_xmit_frame(skb, netdev, NULL);
7896 }
7897
7898 /**
7899 * ixgbe_set_mac - Change the Ethernet Address of the NIC
7900 * @netdev: network interface device structure
7901 * @p: pointer to an address structure
7902 *
7903 * Returns 0 on success, negative on failure
7904 **/
7905 static int ixgbe_set_mac(struct net_device *netdev, void *p)
7906 {
7907 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7908 struct ixgbe_hw *hw = &adapter->hw;
7909 struct sockaddr *addr = p;
7910
7911 if (!is_valid_ether_addr(addr->sa_data))
7912 return -EADDRNOTAVAIL;
7913
7914 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
7915 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
7916
7917 ixgbe_mac_set_default_filter(adapter);
7918
7919 return 0;
7920 }
7921
7922 static int
7923 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
7924 {
7925 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7926 struct ixgbe_hw *hw = &adapter->hw;
7927 u16 value;
7928 int rc;
7929
7930 if (prtad != hw->phy.mdio.prtad)
7931 return -EINVAL;
7932 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
7933 if (!rc)
7934 rc = value;
7935 return rc;
7936 }
7937
7938 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
7939 u16 addr, u16 value)
7940 {
7941 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7942 struct ixgbe_hw *hw = &adapter->hw;
7943
7944 if (prtad != hw->phy.mdio.prtad)
7945 return -EINVAL;
7946 return hw->phy.ops.write_reg(hw, addr, devad, value);
7947 }
7948
7949 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
7950 {
7951 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7952
7953 switch (cmd) {
7954 case SIOCSHWTSTAMP:
7955 return ixgbe_ptp_set_ts_config(adapter, req);
7956 case SIOCGHWTSTAMP:
7957 return ixgbe_ptp_get_ts_config(adapter, req);
7958 default:
7959 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
7960 }
7961 }
7962
7963 /**
7964 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
7965 * netdev->dev_addrs
7966 * @netdev: network interface device structure
7967 *
7968 * Returns non-zero on failure
7969 **/
7970 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
7971 {
7972 int err = 0;
7973 struct ixgbe_adapter *adapter = netdev_priv(dev);
7974 struct ixgbe_hw *hw = &adapter->hw;
7975
7976 if (is_valid_ether_addr(hw->mac.san_addr)) {
7977 rtnl_lock();
7978 err = dev_addr_add(dev, hw->mac.san_addr, NETDEV_HW_ADDR_T_SAN);
7979 rtnl_unlock();
7980
7981 /* update SAN MAC vmdq pool selection */
7982 hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));
7983 }
7984 return err;
7985 }
7986
7987 /**
7988 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
7989 * netdev->dev_addrs
7990 * @netdev: network interface device structure
7991 *
7992 * Returns non-zero on failure
7993 **/
7994 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
7995 {
7996 int err = 0;
7997 struct ixgbe_adapter *adapter = netdev_priv(dev);
7998 struct ixgbe_mac_info *mac = &adapter->hw.mac;
7999
8000 if (is_valid_ether_addr(mac->san_addr)) {
8001 rtnl_lock();
8002 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
8003 rtnl_unlock();
8004 }
8005 return err;
8006 }
8007
8008 #ifdef CONFIG_NET_POLL_CONTROLLER
8009 /*
8010 * Polling 'interrupt' - used by things like netconsole to send skbs
8011 * without having to re-enable interrupts. It's not called while
8012 * the interrupt routine is executing.
8013 */
8014 static void ixgbe_netpoll(struct net_device *netdev)
8015 {
8016 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8017 int i;
8018
8019 /* if interface is down do nothing */
8020 if (test_bit(__IXGBE_DOWN, &adapter->state))
8021 return;
8022
8023 /* loop through and schedule all active queues */
8024 for (i = 0; i < adapter->num_q_vectors; i++)
8025 ixgbe_msix_clean_rings(0, adapter->q_vector[i]);
8026 }
8027
8028 #endif
8029 static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
8030 struct rtnl_link_stats64 *stats)
8031 {
8032 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8033 int i;
8034
8035 rcu_read_lock();
8036 for (i = 0; i < adapter->num_rx_queues; i++) {
8037 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]);
8038 u64 bytes, packets;
8039 unsigned int start;
8040
8041 if (ring) {
8042 do {
8043 start = u64_stats_fetch_begin_irq(&ring->syncp);
8044 packets = ring->stats.packets;
8045 bytes = ring->stats.bytes;
8046 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
8047 stats->rx_packets += packets;
8048 stats->rx_bytes += bytes;
8049 }
8050 }
8051
8052 for (i = 0; i < adapter->num_tx_queues; i++) {
8053 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->tx_ring[i]);
8054 u64 bytes, packets;
8055 unsigned int start;
8056
8057 if (ring) {
8058 do {
8059 start = u64_stats_fetch_begin_irq(&ring->syncp);
8060 packets = ring->stats.packets;
8061 bytes = ring->stats.bytes;
8062 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
8063 stats->tx_packets += packets;
8064 stats->tx_bytes += bytes;
8065 }
8066 }
8067 rcu_read_unlock();
8068 /* following stats updated by ixgbe_watchdog_task() */
8069 stats->multicast = netdev->stats.multicast;
8070 stats->rx_errors = netdev->stats.rx_errors;
8071 stats->rx_length_errors = netdev->stats.rx_length_errors;
8072 stats->rx_crc_errors = netdev->stats.rx_crc_errors;
8073 stats->rx_missed_errors = netdev->stats.rx_missed_errors;
8074 return stats;
8075 }
8076
8077 #ifdef CONFIG_IXGBE_DCB
8078 /**
8079 * ixgbe_validate_rtr - verify 802.1Qp to Rx packet buffer mapping is valid.
8080 * @adapter: pointer to ixgbe_adapter
8081 * @tc: number of traffic classes currently enabled
8082 *
8083 * Configure a valid 802.1Qp to Rx packet buffer mapping ie confirm
8084 * 802.1Q priority maps to a packet buffer that exists.
8085 */
8086 static void ixgbe_validate_rtr(struct ixgbe_adapter *adapter, u8 tc)
8087 {
8088 struct ixgbe_hw *hw = &adapter->hw;
8089 u32 reg, rsave;
8090 int i;
8091
8092 /* 82598 have a static priority to TC mapping that can not
8093 * be changed so no validation is needed.
8094 */
8095 if (hw->mac.type == ixgbe_mac_82598EB)
8096 return;
8097
8098 reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC);
8099 rsave = reg;
8100
8101 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
8102 u8 up2tc = reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT);
8103
8104 /* If up2tc is out of bounds default to zero */
8105 if (up2tc > tc)
8106 reg &= ~(0x7 << IXGBE_RTRUP2TC_UP_SHIFT);
8107 }
8108
8109 if (reg != rsave)
8110 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
8111
8112 return;
8113 }
8114
8115 /**
8116 * ixgbe_set_prio_tc_map - Configure netdev prio tc map
8117 * @adapter: Pointer to adapter struct
8118 *
8119 * Populate the netdev user priority to tc map
8120 */
8121 static void ixgbe_set_prio_tc_map(struct ixgbe_adapter *adapter)
8122 {
8123 struct net_device *dev = adapter->netdev;
8124 struct ixgbe_dcb_config *dcb_cfg = &adapter->dcb_cfg;
8125 struct ieee_ets *ets = adapter->ixgbe_ieee_ets;
8126 u8 prio;
8127
8128 for (prio = 0; prio < MAX_USER_PRIORITY; prio++) {
8129 u8 tc = 0;
8130
8131 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE)
8132 tc = ixgbe_dcb_get_tc_from_up(dcb_cfg, 0, prio);
8133 else if (ets)
8134 tc = ets->prio_tc[prio];
8135
8136 netdev_set_prio_tc_map(dev, prio, tc);
8137 }
8138 }
8139
8140 #endif /* CONFIG_IXGBE_DCB */
8141 /**
8142 * ixgbe_setup_tc - configure net_device for multiple traffic classes
8143 *
8144 * @netdev: net device to configure
8145 * @tc: number of traffic classes to enable
8146 */
8147 int ixgbe_setup_tc(struct net_device *dev, u8 tc)
8148 {
8149 struct ixgbe_adapter *adapter = netdev_priv(dev);
8150 struct ixgbe_hw *hw = &adapter->hw;
8151 bool pools;
8152
8153 /* Hardware supports up to 8 traffic classes */
8154 if (tc > adapter->dcb_cfg.num_tcs.pg_tcs)
8155 return -EINVAL;
8156
8157 if (hw->mac.type == ixgbe_mac_82598EB && tc && tc < MAX_TRAFFIC_CLASS)
8158 return -EINVAL;
8159
8160 pools = (find_first_zero_bit(&adapter->fwd_bitmask, 32) > 1);
8161 if (tc && pools && adapter->num_rx_pools > IXGBE_MAX_DCBMACVLANS)
8162 return -EBUSY;
8163
8164 /* Hardware has to reinitialize queues and interrupts to
8165 * match packet buffer alignment. Unfortunately, the
8166 * hardware is not flexible enough to do this dynamically.
8167 */
8168 if (netif_running(dev))
8169 ixgbe_close(dev);
8170 else
8171 ixgbe_reset(adapter);
8172
8173 ixgbe_clear_interrupt_scheme(adapter);
8174
8175 #ifdef CONFIG_IXGBE_DCB
8176 if (tc) {
8177 netdev_set_num_tc(dev, tc);
8178 ixgbe_set_prio_tc_map(adapter);
8179
8180 adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
8181
8182 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
8183 adapter->last_lfc_mode = adapter->hw.fc.requested_mode;
8184 adapter->hw.fc.requested_mode = ixgbe_fc_none;
8185 }
8186 } else {
8187 netdev_reset_tc(dev);
8188
8189 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
8190 adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
8191
8192 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
8193
8194 adapter->temp_dcb_cfg.pfc_mode_enable = false;
8195 adapter->dcb_cfg.pfc_mode_enable = false;
8196 }
8197
8198 ixgbe_validate_rtr(adapter, tc);
8199
8200 #endif /* CONFIG_IXGBE_DCB */
8201 ixgbe_init_interrupt_scheme(adapter);
8202
8203 if (netif_running(dev))
8204 return ixgbe_open(dev);
8205
8206 return 0;
8207 }
8208
8209 static int ixgbe_delete_clsu32(struct ixgbe_adapter *adapter,
8210 struct tc_cls_u32_offload *cls)
8211 {
8212 int err;
8213
8214 spin_lock(&adapter->fdir_perfect_lock);
8215 err = ixgbe_update_ethtool_fdir_entry(adapter, NULL, cls->knode.handle);
8216 spin_unlock(&adapter->fdir_perfect_lock);
8217 return err;
8218 }
8219
8220 static int ixgbe_configure_clsu32_add_hnode(struct ixgbe_adapter *adapter,
8221 __be16 protocol,
8222 struct tc_cls_u32_offload *cls)
8223 {
8224 /* This ixgbe devices do not support hash tables at the moment
8225 * so abort when given hash tables.
8226 */
8227 if (cls->hnode.divisor > 0)
8228 return -EINVAL;
8229
8230 set_bit(TC_U32_USERHTID(cls->hnode.handle), &adapter->tables);
8231 return 0;
8232 }
8233
8234 static int ixgbe_configure_clsu32_del_hnode(struct ixgbe_adapter *adapter,
8235 struct tc_cls_u32_offload *cls)
8236 {
8237 clear_bit(TC_U32_USERHTID(cls->hnode.handle), &adapter->tables);
8238 return 0;
8239 }
8240
8241 static int ixgbe_configure_clsu32(struct ixgbe_adapter *adapter,
8242 __be16 protocol,
8243 struct tc_cls_u32_offload *cls)
8244 {
8245 u32 loc = cls->knode.handle & 0xfffff;
8246 struct ixgbe_hw *hw = &adapter->hw;
8247 struct ixgbe_mat_field *field_ptr;
8248 struct ixgbe_fdir_filter *input;
8249 union ixgbe_atr_input mask;
8250 #ifdef CONFIG_NET_CLS_ACT
8251 const struct tc_action *a;
8252 #endif
8253 int i, err = 0;
8254 u8 queue;
8255 u32 handle;
8256
8257 memset(&mask, 0, sizeof(union ixgbe_atr_input));
8258 handle = cls->knode.handle;
8259
8260 /* At the moment cls_u32 jumps to transport layer and skips past
8261 * L2 headers. The canonical method to match L2 frames is to use
8262 * negative values. However this is error prone at best but really
8263 * just broken because there is no way to "know" what sort of hdr
8264 * is in front of the transport layer. Fix cls_u32 to support L2
8265 * headers when needed.
8266 */
8267 if (protocol != htons(ETH_P_IP))
8268 return -EINVAL;
8269
8270 if (cls->knode.link_handle ||
8271 cls->knode.link_handle >= IXGBE_MAX_LINK_HANDLE) {
8272 struct ixgbe_nexthdr *nexthdr = ixgbe_ipv4_jumps;
8273 u32 uhtid = TC_U32_USERHTID(cls->knode.link_handle);
8274
8275 if (!test_bit(uhtid, &adapter->tables))
8276 return -EINVAL;
8277
8278 for (i = 0; nexthdr[i].jump; i++) {
8279 if (nexthdr->o != cls->knode.sel->offoff ||
8280 nexthdr->s != cls->knode.sel->offshift ||
8281 nexthdr->m != cls->knode.sel->offmask ||
8282 /* do not support multiple key jumps its just mad */
8283 cls->knode.sel->nkeys > 1)
8284 return -EINVAL;
8285
8286 if (nexthdr->off != cls->knode.sel->keys[0].off ||
8287 nexthdr->val != cls->knode.sel->keys[0].val ||
8288 nexthdr->mask != cls->knode.sel->keys[0].mask)
8289 return -EINVAL;
8290
8291 if (uhtid >= IXGBE_MAX_LINK_HANDLE)
8292 return -EINVAL;
8293
8294 adapter->jump_tables[uhtid] = nexthdr->jump;
8295 }
8296 return 0;
8297 }
8298
8299 if (loc >= ((1024 << adapter->fdir_pballoc) - 2)) {
8300 e_err(drv, "Location out of range\n");
8301 return -EINVAL;
8302 }
8303
8304 /* cls u32 is a graph starting at root node 0x800. The driver tracks
8305 * links and also the fields used to advance the parser across each
8306 * link (e.g. nexthdr/eat parameters from 'tc'). This way we can map
8307 * the u32 graph onto the hardware parse graph denoted in ixgbe_model.h
8308 * To add support for new nodes update ixgbe_model.h parse structures
8309 * this function _should_ be generic try not to hardcode values here.
8310 */
8311 if (TC_U32_USERHTID(handle) == 0x800) {
8312 field_ptr = adapter->jump_tables[0];
8313 } else {
8314 if (TC_U32_USERHTID(handle) >= ARRAY_SIZE(adapter->jump_tables))
8315 return -EINVAL;
8316
8317 field_ptr = adapter->jump_tables[TC_U32_USERHTID(handle)];
8318 }
8319
8320 if (!field_ptr)
8321 return -EINVAL;
8322
8323 input = kzalloc(sizeof(*input), GFP_KERNEL);
8324 if (!input)
8325 return -ENOMEM;
8326
8327 for (i = 0; i < cls->knode.sel->nkeys; i++) {
8328 int off = cls->knode.sel->keys[i].off;
8329 __be32 val = cls->knode.sel->keys[i].val;
8330 __be32 m = cls->knode.sel->keys[i].mask;
8331 bool found_entry = false;
8332 int j;
8333
8334 for (j = 0; field_ptr[j].val; j++) {
8335 if (field_ptr[j].off == off &&
8336 field_ptr[j].mask == m) {
8337 field_ptr[j].val(input, &mask, val, m);
8338 input->filter.formatted.flow_type |=
8339 field_ptr[j].type;
8340 found_entry = true;
8341 break;
8342 }
8343 }
8344
8345 if (!found_entry)
8346 goto err_out;
8347 }
8348
8349 mask.formatted.flow_type = IXGBE_ATR_L4TYPE_IPV6_MASK |
8350 IXGBE_ATR_L4TYPE_MASK;
8351
8352 if (input->filter.formatted.flow_type == IXGBE_ATR_FLOW_TYPE_IPV4)
8353 mask.formatted.flow_type &= IXGBE_ATR_L4TYPE_IPV6_MASK;
8354
8355 #ifdef CONFIG_NET_CLS_ACT
8356 if (list_empty(&cls->knode.exts->actions))
8357 goto err_out;
8358
8359 list_for_each_entry(a, &cls->knode.exts->actions, list) {
8360 if (!is_tcf_gact_shot(a))
8361 goto err_out;
8362 }
8363 #endif
8364
8365 input->action = IXGBE_FDIR_DROP_QUEUE;
8366 queue = IXGBE_FDIR_DROP_QUEUE;
8367 input->sw_idx = loc;
8368
8369 spin_lock(&adapter->fdir_perfect_lock);
8370
8371 if (hlist_empty(&adapter->fdir_filter_list)) {
8372 memcpy(&adapter->fdir_mask, &mask, sizeof(mask));
8373 err = ixgbe_fdir_set_input_mask_82599(hw, &mask);
8374 if (err)
8375 goto err_out_w_lock;
8376 } else if (memcmp(&adapter->fdir_mask, &mask, sizeof(mask))) {
8377 err = -EINVAL;
8378 goto err_out_w_lock;
8379 }
8380
8381 ixgbe_atr_compute_perfect_hash_82599(&input->filter, &mask);
8382 err = ixgbe_fdir_write_perfect_filter_82599(hw, &input->filter,
8383 input->sw_idx, queue);
8384 if (!err)
8385 ixgbe_update_ethtool_fdir_entry(adapter, input, input->sw_idx);
8386 spin_unlock(&adapter->fdir_perfect_lock);
8387
8388 return err;
8389 err_out_w_lock:
8390 spin_unlock(&adapter->fdir_perfect_lock);
8391 err_out:
8392 kfree(input);
8393 return -EINVAL;
8394 }
8395
8396 int __ixgbe_setup_tc(struct net_device *dev, u32 handle, __be16 proto,
8397 struct tc_to_netdev *tc)
8398 {
8399 struct ixgbe_adapter *adapter = netdev_priv(dev);
8400
8401 if (TC_H_MAJ(handle) == TC_H_MAJ(TC_H_INGRESS) &&
8402 tc->type == TC_SETUP_CLSU32) {
8403 switch (tc->cls_u32->command) {
8404 case TC_CLSU32_NEW_KNODE:
8405 case TC_CLSU32_REPLACE_KNODE:
8406 return ixgbe_configure_clsu32(adapter,
8407 proto, tc->cls_u32);
8408 case TC_CLSU32_DELETE_KNODE:
8409 return ixgbe_delete_clsu32(adapter, tc->cls_u32);
8410 case TC_CLSU32_NEW_HNODE:
8411 case TC_CLSU32_REPLACE_HNODE:
8412 return ixgbe_configure_clsu32_add_hnode(adapter, proto,
8413 tc->cls_u32);
8414 case TC_CLSU32_DELETE_HNODE:
8415 return ixgbe_configure_clsu32_del_hnode(adapter,
8416 tc->cls_u32);
8417 default:
8418 return -EINVAL;
8419 }
8420 }
8421
8422 if (tc->type != TC_SETUP_MQPRIO)
8423 return -EINVAL;
8424
8425 return ixgbe_setup_tc(dev, tc->tc);
8426 }
8427
8428 #ifdef CONFIG_PCI_IOV
8429 void ixgbe_sriov_reinit(struct ixgbe_adapter *adapter)
8430 {
8431 struct net_device *netdev = adapter->netdev;
8432
8433 rtnl_lock();
8434 ixgbe_setup_tc(netdev, netdev_get_num_tc(netdev));
8435 rtnl_unlock();
8436 }
8437
8438 #endif
8439 void ixgbe_do_reset(struct net_device *netdev)
8440 {
8441 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8442
8443 if (netif_running(netdev))
8444 ixgbe_reinit_locked(adapter);
8445 else
8446 ixgbe_reset(adapter);
8447 }
8448
8449 static netdev_features_t ixgbe_fix_features(struct net_device *netdev,
8450 netdev_features_t features)
8451 {
8452 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8453
8454 /* If Rx checksum is disabled, then RSC/LRO should also be disabled */
8455 if (!(features & NETIF_F_RXCSUM))
8456 features &= ~NETIF_F_LRO;
8457
8458 /* Turn off LRO if not RSC capable */
8459 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE))
8460 features &= ~NETIF_F_LRO;
8461
8462 return features;
8463 }
8464
8465 static int ixgbe_set_features(struct net_device *netdev,
8466 netdev_features_t features)
8467 {
8468 struct ixgbe_adapter *adapter = netdev_priv(netdev);
8469 netdev_features_t changed = netdev->features ^ features;
8470 bool need_reset = false;
8471
8472 /* Make sure RSC matches LRO, reset if change */
8473 if (!(features & NETIF_F_LRO)) {
8474 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
8475 need_reset = true;
8476 adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED;
8477 } else if ((adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) &&
8478 !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)) {
8479 if (adapter->rx_itr_setting == 1 ||
8480 adapter->rx_itr_setting > IXGBE_MIN_RSC_ITR) {
8481 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
8482 need_reset = true;
8483 } else if ((changed ^ features) & NETIF_F_LRO) {
8484 e_info(probe, "rx-usecs set too low, "
8485 "disabling RSC\n");
8486 }
8487 }
8488
8489 /*
8490 * Check if Flow Director n-tuple support or hw_tc support was
8491 * enabled or disabled. If the state changed, we need to reset.
8492 */
8493 if ((features & NETIF_F_NTUPLE) || (features & NETIF_F_HW_TC)) {
8494 /* turn off ATR, enable perfect filters and reset */
8495 if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
8496 need_reset = true;
8497
8498 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
8499 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
8500 } else {
8501 /* turn off perfect filters, enable ATR and reset */
8502 if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
8503 need_reset = true;
8504
8505 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
8506
8507 /* We cannot enable ATR if SR-IOV is enabled */
8508 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED ||
8509 /* We cannot enable ATR if we have 2 or more tcs */
8510 (netdev_get_num_tc(netdev) > 1) ||
8511 /* We cannot enable ATR if RSS is disabled */
8512 (adapter->ring_feature[RING_F_RSS].limit <= 1) ||
8513 /* A sample rate of 0 indicates ATR disabled */
8514 (!adapter->atr_sample_rate))
8515 ; /* do nothing not supported */
8516 else /* otherwise supported and set the flag */
8517 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
8518 }
8519
8520 if (features & NETIF_F_HW_VLAN_CTAG_RX)
8521 ixgbe_vlan_strip_enable(adapter);
8522 else
8523 ixgbe_vlan_strip_disable(adapter);
8524
8525 if (changed & NETIF_F_RXALL)
8526 need_reset = true;
8527
8528 netdev->features = features;
8529
8530 #ifdef CONFIG_IXGBE_VXLAN
8531 if ((adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE)) {
8532 if (features & NETIF_F_RXCSUM)
8533 adapter->flags2 |= IXGBE_FLAG2_VXLAN_REREG_NEEDED;
8534 else
8535 ixgbe_clear_vxlan_port(adapter);
8536 }
8537 #endif /* CONFIG_IXGBE_VXLAN */
8538
8539 if (need_reset)
8540 ixgbe_do_reset(netdev);
8541
8542 return 0;
8543 }
8544
8545 #ifdef CONFIG_IXGBE_VXLAN
8546 /**
8547 * ixgbe_add_vxlan_port - Get notifications about VXLAN ports that come up
8548 * @dev: The port's netdev
8549 * @sa_family: Socket Family that VXLAN is notifiying us about
8550 * @port: New UDP port number that VXLAN started listening to
8551 **/
8552 static void ixgbe_add_vxlan_port(struct net_device *dev, sa_family_t sa_family,
8553 __be16 port)
8554 {
8555 struct ixgbe_adapter *adapter = netdev_priv(dev);
8556 struct ixgbe_hw *hw = &adapter->hw;
8557 u16 new_port = ntohs(port);
8558
8559 if (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE))
8560 return;
8561
8562 if (sa_family == AF_INET6)
8563 return;
8564
8565 if (adapter->vxlan_port == new_port)
8566 return;
8567
8568 if (adapter->vxlan_port) {
8569 netdev_info(dev,
8570 "Hit Max num of VXLAN ports, not adding port %d\n",
8571 new_port);
8572 return;
8573 }
8574
8575 adapter->vxlan_port = new_port;
8576 IXGBE_WRITE_REG(hw, IXGBE_VXLANCTRL, new_port);
8577 }
8578
8579 /**
8580 * ixgbe_del_vxlan_port - Get notifications about VXLAN ports that go away
8581 * @dev: The port's netdev
8582 * @sa_family: Socket Family that VXLAN is notifying us about
8583 * @port: UDP port number that VXLAN stopped listening to
8584 **/
8585 static void ixgbe_del_vxlan_port(struct net_device *dev, sa_family_t sa_family,
8586 __be16 port)
8587 {
8588 struct ixgbe_adapter *adapter = netdev_priv(dev);
8589 u16 new_port = ntohs(port);
8590
8591 if (!(adapter->flags & IXGBE_FLAG_VXLAN_OFFLOAD_CAPABLE))
8592 return;
8593
8594 if (sa_family == AF_INET6)
8595 return;
8596
8597 if (adapter->vxlan_port != new_port) {
8598 netdev_info(dev, "Port %d was not found, not deleting\n",
8599 new_port);
8600 return;
8601 }
8602
8603 ixgbe_clear_vxlan_port(adapter);
8604 adapter->flags2 |= IXGBE_FLAG2_VXLAN_REREG_NEEDED;
8605 }
8606 #endif /* CONFIG_IXGBE_VXLAN */
8607
8608 static int ixgbe_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
8609 struct net_device *dev,
8610 const unsigned char *addr, u16 vid,
8611 u16 flags)
8612 {
8613 /* guarantee we can provide a unique filter for the unicast address */
8614 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) {
8615 struct ixgbe_adapter *adapter = netdev_priv(dev);
8616 u16 pool = VMDQ_P(0);
8617
8618 if (netdev_uc_count(dev) >= ixgbe_available_rars(adapter, pool))
8619 return -ENOMEM;
8620 }
8621
8622 return ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, flags);
8623 }
8624
8625 /**
8626 * ixgbe_configure_bridge_mode - set various bridge modes
8627 * @adapter - the private structure
8628 * @mode - requested bridge mode
8629 *
8630 * Configure some settings require for various bridge modes.
8631 **/
8632 static int ixgbe_configure_bridge_mode(struct ixgbe_adapter *adapter,
8633 __u16 mode)
8634 {
8635 struct ixgbe_hw *hw = &adapter->hw;
8636 unsigned int p, num_pools;
8637 u32 vmdctl;
8638
8639 switch (mode) {
8640 case BRIDGE_MODE_VEPA:
8641 /* disable Tx loopback, rely on switch hairpin mode */
8642 IXGBE_WRITE_REG(&adapter->hw, IXGBE_PFDTXGSWC, 0);
8643
8644 /* must enable Rx switching replication to allow multicast
8645 * packet reception on all VFs, and to enable source address
8646 * pruning.
8647 */
8648 vmdctl = IXGBE_READ_REG(hw, IXGBE_VMD_CTL);
8649 vmdctl |= IXGBE_VT_CTL_REPLEN;
8650 IXGBE_WRITE_REG(hw, IXGBE_VMD_CTL, vmdctl);
8651
8652 /* enable Rx source address pruning. Note, this requires
8653 * replication to be enabled or else it does nothing.
8654 */
8655 num_pools = adapter->num_vfs + adapter->num_rx_pools;
8656 for (p = 0; p < num_pools; p++) {
8657 if (hw->mac.ops.set_source_address_pruning)
8658 hw->mac.ops.set_source_address_pruning(hw,
8659 true,
8660 p);
8661 }
8662 break;
8663 case BRIDGE_MODE_VEB:
8664 /* enable Tx loopback for internal VF/PF communication */
8665 IXGBE_WRITE_REG(&adapter->hw, IXGBE_PFDTXGSWC,
8666 IXGBE_PFDTXGSWC_VT_LBEN);
8667
8668 /* disable Rx switching replication unless we have SR-IOV
8669 * virtual functions
8670 */
8671 vmdctl = IXGBE_READ_REG(hw, IXGBE_VMD_CTL);
8672 if (!adapter->num_vfs)
8673 vmdctl &= ~IXGBE_VT_CTL_REPLEN;
8674 IXGBE_WRITE_REG(hw, IXGBE_VMD_CTL, vmdctl);
8675
8676 /* disable Rx source address pruning, since we don't expect to
8677 * be receiving external loopback of our transmitted frames.
8678 */
8679 num_pools = adapter->num_vfs + adapter->num_rx_pools;
8680 for (p = 0; p < num_pools; p++) {
8681 if (hw->mac.ops.set_source_address_pruning)
8682 hw->mac.ops.set_source_address_pruning(hw,
8683 false,
8684 p);
8685 }
8686 break;
8687 default:
8688 return -EINVAL;
8689 }
8690
8691 adapter->bridge_mode = mode;
8692
8693 e_info(drv, "enabling bridge mode: %s\n",
8694 mode == BRIDGE_MODE_VEPA ? "VEPA" : "VEB");
8695
8696 return 0;
8697 }
8698
8699 static int ixgbe_ndo_bridge_setlink(struct net_device *dev,
8700 struct nlmsghdr *nlh, u16 flags)
8701 {
8702 struct ixgbe_adapter *adapter = netdev_priv(dev);
8703 struct nlattr *attr, *br_spec;
8704 int rem;
8705
8706 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
8707 return -EOPNOTSUPP;
8708
8709 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
8710 if (!br_spec)
8711 return -EINVAL;
8712
8713 nla_for_each_nested(attr, br_spec, rem) {
8714 int status;
8715 __u16 mode;
8716
8717 if (nla_type(attr) != IFLA_BRIDGE_MODE)
8718 continue;
8719
8720 if (nla_len(attr) < sizeof(mode))
8721 return -EINVAL;
8722
8723 mode = nla_get_u16(attr);
8724 status = ixgbe_configure_bridge_mode(adapter, mode);
8725 if (status)
8726 return status;
8727
8728 break;
8729 }
8730
8731 return 0;
8732 }
8733
8734 static int ixgbe_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
8735 struct net_device *dev,
8736 u32 filter_mask, int nlflags)
8737 {
8738 struct ixgbe_adapter *adapter = netdev_priv(dev);
8739
8740 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
8741 return 0;
8742
8743 return ndo_dflt_bridge_getlink(skb, pid, seq, dev,
8744 adapter->bridge_mode, 0, 0, nlflags,
8745 filter_mask, NULL);
8746 }
8747
8748 static void *ixgbe_fwd_add(struct net_device *pdev, struct net_device *vdev)
8749 {
8750 struct ixgbe_fwd_adapter *fwd_adapter = NULL;
8751 struct ixgbe_adapter *adapter = netdev_priv(pdev);
8752 int used_pools = adapter->num_vfs + adapter->num_rx_pools;
8753 unsigned int limit;
8754 int pool, err;
8755
8756 /* Hardware has a limited number of available pools. Each VF, and the
8757 * PF require a pool. Check to ensure we don't attempt to use more
8758 * then the available number of pools.
8759 */
8760 if (used_pools >= IXGBE_MAX_VF_FUNCTIONS)
8761 return ERR_PTR(-EINVAL);
8762
8763 #ifdef CONFIG_RPS
8764 if (vdev->num_rx_queues != vdev->num_tx_queues) {
8765 netdev_info(pdev, "%s: Only supports a single queue count for TX and RX\n",
8766 vdev->name);
8767 return ERR_PTR(-EINVAL);
8768 }
8769 #endif
8770 /* Check for hardware restriction on number of rx/tx queues */
8771 if (vdev->num_tx_queues > IXGBE_MAX_L2A_QUEUES ||
8772 vdev->num_tx_queues == IXGBE_BAD_L2A_QUEUE) {
8773 netdev_info(pdev,
8774 "%s: Supports RX/TX Queue counts 1,2, and 4\n",
8775 pdev->name);
8776 return ERR_PTR(-EINVAL);
8777 }
8778
8779 if (((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
8780 adapter->num_rx_pools > IXGBE_MAX_DCBMACVLANS - 1) ||
8781 (adapter->num_rx_pools > IXGBE_MAX_MACVLANS))
8782 return ERR_PTR(-EBUSY);
8783
8784 fwd_adapter = kzalloc(sizeof(*fwd_adapter), GFP_KERNEL);
8785 if (!fwd_adapter)
8786 return ERR_PTR(-ENOMEM);
8787
8788 pool = find_first_zero_bit(&adapter->fwd_bitmask, 32);
8789 adapter->num_rx_pools++;
8790 set_bit(pool, &adapter->fwd_bitmask);
8791 limit = find_last_bit(&adapter->fwd_bitmask, 32);
8792
8793 /* Enable VMDq flag so device will be set in VM mode */
8794 adapter->flags |= IXGBE_FLAG_VMDQ_ENABLED | IXGBE_FLAG_SRIOV_ENABLED;
8795 adapter->ring_feature[RING_F_VMDQ].limit = limit + 1;
8796 adapter->ring_feature[RING_F_RSS].limit = vdev->num_tx_queues;
8797
8798 /* Force reinit of ring allocation with VMDQ enabled */
8799 err = ixgbe_setup_tc(pdev, netdev_get_num_tc(pdev));
8800 if (err)
8801 goto fwd_add_err;
8802 fwd_adapter->pool = pool;
8803 fwd_adapter->real_adapter = adapter;
8804 err = ixgbe_fwd_ring_up(vdev, fwd_adapter);
8805 if (err)
8806 goto fwd_add_err;
8807 netif_tx_start_all_queues(vdev);
8808 return fwd_adapter;
8809 fwd_add_err:
8810 /* unwind counter and free adapter struct */
8811 netdev_info(pdev,
8812 "%s: dfwd hardware acceleration failed\n", vdev->name);
8813 clear_bit(pool, &adapter->fwd_bitmask);
8814 adapter->num_rx_pools--;
8815 kfree(fwd_adapter);
8816 return ERR_PTR(err);
8817 }
8818
8819 static void ixgbe_fwd_del(struct net_device *pdev, void *priv)
8820 {
8821 struct ixgbe_fwd_adapter *fwd_adapter = priv;
8822 struct ixgbe_adapter *adapter = fwd_adapter->real_adapter;
8823 unsigned int limit;
8824
8825 clear_bit(fwd_adapter->pool, &adapter->fwd_bitmask);
8826 adapter->num_rx_pools--;
8827
8828 limit = find_last_bit(&adapter->fwd_bitmask, 32);
8829 adapter->ring_feature[RING_F_VMDQ].limit = limit + 1;
8830 ixgbe_fwd_ring_down(fwd_adapter->netdev, fwd_adapter);
8831 ixgbe_setup_tc(pdev, netdev_get_num_tc(pdev));
8832 netdev_dbg(pdev, "pool %i:%i queues %i:%i VSI bitmask %lx\n",
8833 fwd_adapter->pool, adapter->num_rx_pools,
8834 fwd_adapter->rx_base_queue,
8835 fwd_adapter->rx_base_queue + adapter->num_rx_queues_per_pool,
8836 adapter->fwd_bitmask);
8837 kfree(fwd_adapter);
8838 }
8839
8840 #define IXGBE_MAX_TUNNEL_HDR_LEN 80
8841 static netdev_features_t
8842 ixgbe_features_check(struct sk_buff *skb, struct net_device *dev,
8843 netdev_features_t features)
8844 {
8845 if (!skb->encapsulation)
8846 return features;
8847
8848 if (unlikely(skb_inner_mac_header(skb) - skb_transport_header(skb) >
8849 IXGBE_MAX_TUNNEL_HDR_LEN))
8850 return features & ~NETIF_F_CSUM_MASK;
8851
8852 return features;
8853 }
8854
8855 static const struct net_device_ops ixgbe_netdev_ops = {
8856 .ndo_open = ixgbe_open,
8857 .ndo_stop = ixgbe_close,
8858 .ndo_start_xmit = ixgbe_xmit_frame,
8859 .ndo_select_queue = ixgbe_select_queue,
8860 .ndo_set_rx_mode = ixgbe_set_rx_mode,
8861 .ndo_validate_addr = eth_validate_addr,
8862 .ndo_set_mac_address = ixgbe_set_mac,
8863 .ndo_change_mtu = ixgbe_change_mtu,
8864 .ndo_tx_timeout = ixgbe_tx_timeout,
8865 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
8866 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
8867 .ndo_do_ioctl = ixgbe_ioctl,
8868 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
8869 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
8870 .ndo_set_vf_rate = ixgbe_ndo_set_vf_bw,
8871 .ndo_set_vf_spoofchk = ixgbe_ndo_set_vf_spoofchk,
8872 .ndo_set_vf_rss_query_en = ixgbe_ndo_set_vf_rss_query_en,
8873 .ndo_set_vf_trust = ixgbe_ndo_set_vf_trust,
8874 .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
8875 .ndo_get_stats64 = ixgbe_get_stats64,
8876 .ndo_setup_tc = __ixgbe_setup_tc,
8877 #ifdef CONFIG_NET_POLL_CONTROLLER
8878 .ndo_poll_controller = ixgbe_netpoll,
8879 #endif
8880 #ifdef CONFIG_NET_RX_BUSY_POLL
8881 .ndo_busy_poll = ixgbe_low_latency_recv,
8882 #endif
8883 #ifdef IXGBE_FCOE
8884 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
8885 .ndo_fcoe_ddp_target = ixgbe_fcoe_ddp_target,
8886 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
8887 .ndo_fcoe_enable = ixgbe_fcoe_enable,
8888 .ndo_fcoe_disable = ixgbe_fcoe_disable,
8889 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
8890 .ndo_fcoe_get_hbainfo = ixgbe_fcoe_get_hbainfo,
8891 #endif /* IXGBE_FCOE */
8892 .ndo_set_features = ixgbe_set_features,
8893 .ndo_fix_features = ixgbe_fix_features,
8894 .ndo_fdb_add = ixgbe_ndo_fdb_add,
8895 .ndo_bridge_setlink = ixgbe_ndo_bridge_setlink,
8896 .ndo_bridge_getlink = ixgbe_ndo_bridge_getlink,
8897 .ndo_dfwd_add_station = ixgbe_fwd_add,
8898 .ndo_dfwd_del_station = ixgbe_fwd_del,
8899 #ifdef CONFIG_IXGBE_VXLAN
8900 .ndo_add_vxlan_port = ixgbe_add_vxlan_port,
8901 .ndo_del_vxlan_port = ixgbe_del_vxlan_port,
8902 #endif /* CONFIG_IXGBE_VXLAN */
8903 .ndo_features_check = ixgbe_features_check,
8904 };
8905
8906 /**
8907 * ixgbe_enumerate_functions - Get the number of ports this device has
8908 * @adapter: adapter structure
8909 *
8910 * This function enumerates the phsyical functions co-located on a single slot,
8911 * in order to determine how many ports a device has. This is most useful in
8912 * determining the required GT/s of PCIe bandwidth necessary for optimal
8913 * performance.
8914 **/
8915 static inline int ixgbe_enumerate_functions(struct ixgbe_adapter *adapter)
8916 {
8917 struct pci_dev *entry, *pdev = adapter->pdev;
8918 int physfns = 0;
8919
8920 /* Some cards can not use the generic count PCIe functions method,
8921 * because they are behind a parent switch, so we hardcode these with
8922 * the correct number of functions.
8923 */
8924 if (ixgbe_pcie_from_parent(&adapter->hw))
8925 physfns = 4;
8926
8927 list_for_each_entry(entry, &adapter->pdev->bus->devices, bus_list) {
8928 /* don't count virtual functions */
8929 if (entry->is_virtfn)
8930 continue;
8931
8932 /* When the devices on the bus don't all match our device ID,
8933 * we can't reliably determine the correct number of
8934 * functions. This can occur if a function has been direct
8935 * attached to a virtual machine using VT-d, for example. In
8936 * this case, simply return -1 to indicate this.
8937 */
8938 if ((entry->vendor != pdev->vendor) ||
8939 (entry->device != pdev->device))
8940 return -1;
8941
8942 physfns++;
8943 }
8944
8945 return physfns;
8946 }
8947
8948 /**
8949 * ixgbe_wol_supported - Check whether device supports WoL
8950 * @hw: hw specific details
8951 * @device_id: the device ID
8952 * @subdev_id: the subsystem device ID
8953 *
8954 * This function is used by probe and ethtool to determine
8955 * which devices have WoL support
8956 *
8957 **/
8958 int ixgbe_wol_supported(struct ixgbe_adapter *adapter, u16 device_id,
8959 u16 subdevice_id)
8960 {
8961 struct ixgbe_hw *hw = &adapter->hw;
8962 u16 wol_cap = adapter->eeprom_cap & IXGBE_DEVICE_CAPS_WOL_MASK;
8963 int is_wol_supported = 0;
8964
8965 switch (device_id) {
8966 case IXGBE_DEV_ID_82599_SFP:
8967 /* Only these subdevices could supports WOL */
8968 switch (subdevice_id) {
8969 case IXGBE_SUBDEV_ID_82599_SFP_WOL0:
8970 case IXGBE_SUBDEV_ID_82599_560FLR:
8971 /* only support first port */
8972 if (hw->bus.func != 0)
8973 break;
8974 case IXGBE_SUBDEV_ID_82599_SP_560FLR:
8975 case IXGBE_SUBDEV_ID_82599_SFP:
8976 case IXGBE_SUBDEV_ID_82599_RNDC:
8977 case IXGBE_SUBDEV_ID_82599_ECNA_DP:
8978 case IXGBE_SUBDEV_ID_82599_LOM_SFP:
8979 is_wol_supported = 1;
8980 break;
8981 }
8982 break;
8983 case IXGBE_DEV_ID_82599EN_SFP:
8984 /* Only this subdevice supports WOL */
8985 switch (subdevice_id) {
8986 case IXGBE_SUBDEV_ID_82599EN_SFP_OCP1:
8987 is_wol_supported = 1;
8988 break;
8989 }
8990 break;
8991 case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
8992 /* All except this subdevice support WOL */
8993 if (subdevice_id != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ)
8994 is_wol_supported = 1;
8995 break;
8996 case IXGBE_DEV_ID_82599_KX4:
8997 is_wol_supported = 1;
8998 break;
8999 case IXGBE_DEV_ID_X540T:
9000 case IXGBE_DEV_ID_X540T1:
9001 case IXGBE_DEV_ID_X550T:
9002 case IXGBE_DEV_ID_X550EM_X_KX4:
9003 case IXGBE_DEV_ID_X550EM_X_KR:
9004 case IXGBE_DEV_ID_X550EM_X_10G_T:
9005 /* check eeprom to see if enabled wol */
9006 if ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0_1) ||
9007 ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0) &&
9008 (hw->bus.func == 0))) {
9009 is_wol_supported = 1;
9010 }
9011 break;
9012 }
9013
9014 return is_wol_supported;
9015 }
9016
9017 /**
9018 * ixgbe_get_platform_mac_addr - Look up MAC address in Open Firmware / IDPROM
9019 * @adapter: Pointer to adapter struct
9020 */
9021 static void ixgbe_get_platform_mac_addr(struct ixgbe_adapter *adapter)
9022 {
9023 #ifdef CONFIG_OF
9024 struct device_node *dp = pci_device_to_OF_node(adapter->pdev);
9025 struct ixgbe_hw *hw = &adapter->hw;
9026 const unsigned char *addr;
9027
9028 addr = of_get_mac_address(dp);
9029 if (addr) {
9030 ether_addr_copy(hw->mac.perm_addr, addr);
9031 return;
9032 }
9033 #endif /* CONFIG_OF */
9034
9035 #ifdef CONFIG_SPARC
9036 ether_addr_copy(hw->mac.perm_addr, idprom->id_ethaddr);
9037 #endif /* CONFIG_SPARC */
9038 }
9039
9040 /**
9041 * ixgbe_probe - Device Initialization Routine
9042 * @pdev: PCI device information struct
9043 * @ent: entry in ixgbe_pci_tbl
9044 *
9045 * Returns 0 on success, negative on failure
9046 *
9047 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
9048 * The OS initialization, configuring of the adapter private structure,
9049 * and a hardware reset occur.
9050 **/
9051 static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
9052 {
9053 struct net_device *netdev;
9054 struct ixgbe_adapter *adapter = NULL;
9055 struct ixgbe_hw *hw;
9056 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
9057 int i, err, pci_using_dac, expected_gts;
9058 unsigned int indices = MAX_TX_QUEUES;
9059 u8 part_str[IXGBE_PBANUM_LENGTH];
9060 bool disable_dev = false;
9061 #ifdef IXGBE_FCOE
9062 u16 device_caps;
9063 #endif
9064 u32 eec;
9065
9066 /* Catch broken hardware that put the wrong VF device ID in
9067 * the PCIe SR-IOV capability.
9068 */
9069 if (pdev->is_virtfn) {
9070 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
9071 pci_name(pdev), pdev->vendor, pdev->device);
9072 return -EINVAL;
9073 }
9074
9075 err = pci_enable_device_mem(pdev);
9076 if (err)
9077 return err;
9078
9079 if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
9080 pci_using_dac = 1;
9081 } else {
9082 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
9083 if (err) {
9084 dev_err(&pdev->dev,
9085 "No usable DMA configuration, aborting\n");
9086 goto err_dma;
9087 }
9088 pci_using_dac = 0;
9089 }
9090
9091 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
9092 IORESOURCE_MEM), ixgbe_driver_name);
9093 if (err) {
9094 dev_err(&pdev->dev,
9095 "pci_request_selected_regions failed 0x%x\n", err);
9096 goto err_pci_reg;
9097 }
9098
9099 pci_enable_pcie_error_reporting(pdev);
9100
9101 pci_set_master(pdev);
9102 pci_save_state(pdev);
9103
9104 if (ii->mac == ixgbe_mac_82598EB) {
9105 #ifdef CONFIG_IXGBE_DCB
9106 /* 8 TC w/ 4 queues per TC */
9107 indices = 4 * MAX_TRAFFIC_CLASS;
9108 #else
9109 indices = IXGBE_MAX_RSS_INDICES;
9110 #endif
9111 }
9112
9113 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
9114 if (!netdev) {
9115 err = -ENOMEM;
9116 goto err_alloc_etherdev;
9117 }
9118
9119 SET_NETDEV_DEV(netdev, &pdev->dev);
9120
9121 adapter = netdev_priv(netdev);
9122
9123 adapter->netdev = netdev;
9124 adapter->pdev = pdev;
9125 hw = &adapter->hw;
9126 hw->back = adapter;
9127 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
9128
9129 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
9130 pci_resource_len(pdev, 0));
9131 adapter->io_addr = hw->hw_addr;
9132 if (!hw->hw_addr) {
9133 err = -EIO;
9134 goto err_ioremap;
9135 }
9136
9137 netdev->netdev_ops = &ixgbe_netdev_ops;
9138 ixgbe_set_ethtool_ops(netdev);
9139 netdev->watchdog_timeo = 5 * HZ;
9140 strlcpy(netdev->name, pci_name(pdev), sizeof(netdev->name));
9141
9142 /* Setup hw api */
9143 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
9144 hw->mac.type = ii->mac;
9145 hw->mvals = ii->mvals;
9146
9147 /* EEPROM */
9148 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
9149 eec = IXGBE_READ_REG(hw, IXGBE_EEC(hw));
9150 if (ixgbe_removed(hw->hw_addr)) {
9151 err = -EIO;
9152 goto err_ioremap;
9153 }
9154 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
9155 if (!(eec & (1 << 8)))
9156 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
9157
9158 /* PHY */
9159 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
9160 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
9161 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
9162 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
9163 hw->phy.mdio.mmds = 0;
9164 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
9165 hw->phy.mdio.dev = netdev;
9166 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
9167 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
9168
9169 ii->get_invariants(hw);
9170
9171 /* setup the private structure */
9172 err = ixgbe_sw_init(adapter);
9173 if (err)
9174 goto err_sw_init;
9175
9176 /* Make it possible the adapter to be woken up via WOL */
9177 switch (adapter->hw.mac.type) {
9178 case ixgbe_mac_82599EB:
9179 case ixgbe_mac_X540:
9180 case ixgbe_mac_X550:
9181 case ixgbe_mac_X550EM_x:
9182 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
9183 break;
9184 default:
9185 break;
9186 }
9187
9188 /*
9189 * If there is a fan on this device and it has failed log the
9190 * failure.
9191 */
9192 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
9193 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
9194 if (esdp & IXGBE_ESDP_SDP1)
9195 e_crit(probe, "Fan has stopped, replace the adapter\n");
9196 }
9197
9198 if (allow_unsupported_sfp)
9199 hw->allow_unsupported_sfp = allow_unsupported_sfp;
9200
9201 /* reset_hw fills in the perm_addr as well */
9202 hw->phy.reset_if_overtemp = true;
9203 err = hw->mac.ops.reset_hw(hw);
9204 hw->phy.reset_if_overtemp = false;
9205 if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
9206 err = 0;
9207 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
9208 e_dev_err("failed to load because an unsupported SFP+ or QSFP module type was detected.\n");
9209 e_dev_err("Reload the driver after installing a supported module.\n");
9210 goto err_sw_init;
9211 } else if (err) {
9212 e_dev_err("HW Init failed: %d\n", err);
9213 goto err_sw_init;
9214 }
9215
9216 #ifdef CONFIG_PCI_IOV
9217 /* SR-IOV not supported on the 82598 */
9218 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
9219 goto skip_sriov;
9220 /* Mailbox */
9221 ixgbe_init_mbx_params_pf(hw);
9222 memcpy(&hw->mbx.ops, ii->mbx_ops, sizeof(hw->mbx.ops));
9223 pci_sriov_set_totalvfs(pdev, IXGBE_MAX_VFS_DRV_LIMIT);
9224 ixgbe_enable_sriov(adapter);
9225 skip_sriov:
9226
9227 #endif
9228 netdev->features = NETIF_F_SG |
9229 NETIF_F_IP_CSUM |
9230 NETIF_F_IPV6_CSUM |
9231 NETIF_F_HW_VLAN_CTAG_TX |
9232 NETIF_F_HW_VLAN_CTAG_RX |
9233 NETIF_F_TSO |
9234 NETIF_F_TSO6 |
9235 NETIF_F_RXHASH |
9236 NETIF_F_RXCSUM;
9237
9238 netdev->hw_features = netdev->features | NETIF_F_HW_L2FW_DOFFLOAD;
9239
9240 switch (adapter->hw.mac.type) {
9241 case ixgbe_mac_82599EB:
9242 case ixgbe_mac_X540:
9243 case ixgbe_mac_X550:
9244 case ixgbe_mac_X550EM_x:
9245 netdev->features |= NETIF_F_SCTP_CRC;
9246 netdev->hw_features |= NETIF_F_SCTP_CRC |
9247 NETIF_F_NTUPLE |
9248 NETIF_F_HW_TC;
9249 break;
9250 default:
9251 break;
9252 }
9253
9254 netdev->hw_features |= NETIF_F_RXALL;
9255 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
9256
9257 netdev->vlan_features |= NETIF_F_TSO;
9258 netdev->vlan_features |= NETIF_F_TSO6;
9259 netdev->vlan_features |= NETIF_F_IP_CSUM;
9260 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
9261 netdev->vlan_features |= NETIF_F_SG;
9262
9263 netdev->hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
9264
9265 netdev->priv_flags |= IFF_UNICAST_FLT;
9266 netdev->priv_flags |= IFF_SUPP_NOFCS;
9267
9268 #ifdef CONFIG_IXGBE_VXLAN
9269 switch (adapter->hw.mac.type) {
9270 case ixgbe_mac_X550:
9271 case ixgbe_mac_X550EM_x:
9272 netdev->hw_enc_features |= NETIF_F_RXCSUM;
9273 break;
9274 default:
9275 break;
9276 }
9277 #endif /* CONFIG_IXGBE_VXLAN */
9278
9279 #ifdef CONFIG_IXGBE_DCB
9280 netdev->dcbnl_ops = &dcbnl_ops;
9281 #endif
9282
9283 #ifdef IXGBE_FCOE
9284 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
9285 unsigned int fcoe_l;
9286
9287 if (hw->mac.ops.get_device_caps) {
9288 hw->mac.ops.get_device_caps(hw, &device_caps);
9289 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
9290 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
9291 }
9292
9293
9294 fcoe_l = min_t(int, IXGBE_FCRETA_SIZE, num_online_cpus());
9295 adapter->ring_feature[RING_F_FCOE].limit = fcoe_l;
9296
9297 netdev->features |= NETIF_F_FSO |
9298 NETIF_F_FCOE_CRC;
9299
9300 netdev->vlan_features |= NETIF_F_FSO |
9301 NETIF_F_FCOE_CRC |
9302 NETIF_F_FCOE_MTU;
9303 }
9304 #endif /* IXGBE_FCOE */
9305 if (pci_using_dac) {
9306 netdev->features |= NETIF_F_HIGHDMA;
9307 netdev->vlan_features |= NETIF_F_HIGHDMA;
9308 }
9309
9310 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
9311 netdev->hw_features |= NETIF_F_LRO;
9312 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
9313 netdev->features |= NETIF_F_LRO;
9314
9315 /* make sure the EEPROM is good */
9316 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
9317 e_dev_err("The EEPROM Checksum Is Not Valid\n");
9318 err = -EIO;
9319 goto err_sw_init;
9320 }
9321
9322 ixgbe_get_platform_mac_addr(adapter);
9323
9324 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
9325
9326 if (!is_valid_ether_addr(netdev->dev_addr)) {
9327 e_dev_err("invalid MAC address\n");
9328 err = -EIO;
9329 goto err_sw_init;
9330 }
9331
9332 ixgbe_mac_set_default_filter(adapter);
9333
9334 setup_timer(&adapter->service_timer, &ixgbe_service_timer,
9335 (unsigned long) adapter);
9336
9337 if (ixgbe_removed(hw->hw_addr)) {
9338 err = -EIO;
9339 goto err_sw_init;
9340 }
9341 INIT_WORK(&adapter->service_task, ixgbe_service_task);
9342 set_bit(__IXGBE_SERVICE_INITED, &adapter->state);
9343 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
9344
9345 err = ixgbe_init_interrupt_scheme(adapter);
9346 if (err)
9347 goto err_sw_init;
9348
9349 /* WOL not supported for all devices */
9350 adapter->wol = 0;
9351 hw->eeprom.ops.read(hw, 0x2c, &adapter->eeprom_cap);
9352 hw->wol_enabled = ixgbe_wol_supported(adapter, pdev->device,
9353 pdev->subsystem_device);
9354 if (hw->wol_enabled)
9355 adapter->wol = IXGBE_WUFC_MAG;
9356
9357 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
9358
9359 /* save off EEPROM version number */
9360 hw->eeprom.ops.read(hw, 0x2e, &adapter->eeprom_verh);
9361 hw->eeprom.ops.read(hw, 0x2d, &adapter->eeprom_verl);
9362
9363 /* pick up the PCI bus settings for reporting later */
9364 if (ixgbe_pcie_from_parent(hw))
9365 ixgbe_get_parent_bus_info(adapter);
9366 else
9367 hw->mac.ops.get_bus_info(hw);
9368
9369 /* calculate the expected PCIe bandwidth required for optimal
9370 * performance. Note that some older parts will never have enough
9371 * bandwidth due to being older generation PCIe parts. We clamp these
9372 * parts to ensure no warning is displayed if it can't be fixed.
9373 */
9374 switch (hw->mac.type) {
9375 case ixgbe_mac_82598EB:
9376 expected_gts = min(ixgbe_enumerate_functions(adapter) * 10, 16);
9377 break;
9378 default:
9379 expected_gts = ixgbe_enumerate_functions(adapter) * 10;
9380 break;
9381 }
9382
9383 /* don't check link if we failed to enumerate functions */
9384 if (expected_gts > 0)
9385 ixgbe_check_minimum_link(adapter, expected_gts);
9386
9387 err = ixgbe_read_pba_string_generic(hw, part_str, sizeof(part_str));
9388 if (err)
9389 strlcpy(part_str, "Unknown", sizeof(part_str));
9390 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
9391 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, PBA No: %s\n",
9392 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
9393 part_str);
9394 else
9395 e_dev_info("MAC: %d, PHY: %d, PBA No: %s\n",
9396 hw->mac.type, hw->phy.type, part_str);
9397
9398 e_dev_info("%pM\n", netdev->dev_addr);
9399
9400 /* reset the hardware with the new settings */
9401 err = hw->mac.ops.start_hw(hw);
9402 if (err == IXGBE_ERR_EEPROM_VERSION) {
9403 /* We are running on a pre-production device, log a warning */
9404 e_dev_warn("This device is a pre-production adapter/LOM. "
9405 "Please be aware there may be issues associated "
9406 "with your hardware. If you are experiencing "
9407 "problems please contact your Intel or hardware "
9408 "representative who provided you with this "
9409 "hardware.\n");
9410 }
9411 strcpy(netdev->name, "eth%d");
9412 err = register_netdev(netdev);
9413 if (err)
9414 goto err_register;
9415
9416 pci_set_drvdata(pdev, adapter);
9417
9418 /* power down the optics for 82599 SFP+ fiber */
9419 if (hw->mac.ops.disable_tx_laser)
9420 hw->mac.ops.disable_tx_laser(hw);
9421
9422 /* carrier off reporting is important to ethtool even BEFORE open */
9423 netif_carrier_off(netdev);
9424
9425 #ifdef CONFIG_IXGBE_DCA
9426 if (dca_add_requester(&pdev->dev) == 0) {
9427 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
9428 ixgbe_setup_dca(adapter);
9429 }
9430 #endif
9431 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
9432 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
9433 for (i = 0; i < adapter->num_vfs; i++)
9434 ixgbe_vf_configuration(pdev, (i | 0x10000000));
9435 }
9436
9437 /* firmware requires driver version to be 0xFFFFFFFF
9438 * since os does not support feature
9439 */
9440 if (hw->mac.ops.set_fw_drv_ver)
9441 hw->mac.ops.set_fw_drv_ver(hw, 0xFF, 0xFF, 0xFF,
9442 0xFF);
9443
9444 /* add san mac addr to netdev */
9445 ixgbe_add_sanmac_netdev(netdev);
9446
9447 e_dev_info("%s\n", ixgbe_default_device_descr);
9448
9449 #ifdef CONFIG_IXGBE_HWMON
9450 if (ixgbe_sysfs_init(adapter))
9451 e_err(probe, "failed to allocate sysfs resources\n");
9452 #endif /* CONFIG_IXGBE_HWMON */
9453
9454 ixgbe_dbg_adapter_init(adapter);
9455
9456 /* setup link for SFP devices with MNG FW, else wait for IXGBE_UP */
9457 if (ixgbe_mng_enabled(hw) && ixgbe_is_sfp(hw) && hw->mac.ops.setup_link)
9458 hw->mac.ops.setup_link(hw,
9459 IXGBE_LINK_SPEED_10GB_FULL | IXGBE_LINK_SPEED_1GB_FULL,
9460 true);
9461
9462 return 0;
9463
9464 err_register:
9465 ixgbe_release_hw_control(adapter);
9466 ixgbe_clear_interrupt_scheme(adapter);
9467 err_sw_init:
9468 ixgbe_disable_sriov(adapter);
9469 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
9470 iounmap(adapter->io_addr);
9471 kfree(adapter->mac_table);
9472 err_ioremap:
9473 disable_dev = !test_and_set_bit(__IXGBE_DISABLED, &adapter->state);
9474 free_netdev(netdev);
9475 err_alloc_etherdev:
9476 pci_release_selected_regions(pdev,
9477 pci_select_bars(pdev, IORESOURCE_MEM));
9478 err_pci_reg:
9479 err_dma:
9480 if (!adapter || disable_dev)
9481 pci_disable_device(pdev);
9482 return err;
9483 }
9484
9485 /**
9486 * ixgbe_remove - Device Removal Routine
9487 * @pdev: PCI device information struct
9488 *
9489 * ixgbe_remove is called by the PCI subsystem to alert the driver
9490 * that it should release a PCI device. The could be caused by a
9491 * Hot-Plug event, or because the driver is going to be removed from
9492 * memory.
9493 **/
9494 static void ixgbe_remove(struct pci_dev *pdev)
9495 {
9496 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
9497 struct net_device *netdev;
9498 bool disable_dev;
9499
9500 /* if !adapter then we already cleaned up in probe */
9501 if (!adapter)
9502 return;
9503
9504 netdev = adapter->netdev;
9505 ixgbe_dbg_adapter_exit(adapter);
9506
9507 set_bit(__IXGBE_REMOVING, &adapter->state);
9508 cancel_work_sync(&adapter->service_task);
9509
9510
9511 #ifdef CONFIG_IXGBE_DCA
9512 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
9513 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
9514 dca_remove_requester(&pdev->dev);
9515 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL,
9516 IXGBE_DCA_CTRL_DCA_DISABLE);
9517 }
9518
9519 #endif
9520 #ifdef CONFIG_IXGBE_HWMON
9521 ixgbe_sysfs_exit(adapter);
9522 #endif /* CONFIG_IXGBE_HWMON */
9523
9524 /* remove the added san mac */
9525 ixgbe_del_sanmac_netdev(netdev);
9526
9527 #ifdef CONFIG_PCI_IOV
9528 ixgbe_disable_sriov(adapter);
9529 #endif
9530 if (netdev->reg_state == NETREG_REGISTERED)
9531 unregister_netdev(netdev);
9532
9533 ixgbe_clear_interrupt_scheme(adapter);
9534
9535 ixgbe_release_hw_control(adapter);
9536
9537 #ifdef CONFIG_DCB
9538 kfree(adapter->ixgbe_ieee_pfc);
9539 kfree(adapter->ixgbe_ieee_ets);
9540
9541 #endif
9542 iounmap(adapter->io_addr);
9543 pci_release_selected_regions(pdev, pci_select_bars(pdev,
9544 IORESOURCE_MEM));
9545
9546 e_dev_info("complete\n");
9547
9548 kfree(adapter->mac_table);
9549 disable_dev = !test_and_set_bit(__IXGBE_DISABLED, &adapter->state);
9550 free_netdev(netdev);
9551
9552 pci_disable_pcie_error_reporting(pdev);
9553
9554 if (disable_dev)
9555 pci_disable_device(pdev);
9556 }
9557
9558 /**
9559 * ixgbe_io_error_detected - called when PCI error is detected
9560 * @pdev: Pointer to PCI device
9561 * @state: The current pci connection state
9562 *
9563 * This function is called after a PCI bus error affecting
9564 * this device has been detected.
9565 */
9566 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
9567 pci_channel_state_t state)
9568 {
9569 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
9570 struct net_device *netdev = adapter->netdev;
9571
9572 #ifdef CONFIG_PCI_IOV
9573 struct ixgbe_hw *hw = &adapter->hw;
9574 struct pci_dev *bdev, *vfdev;
9575 u32 dw0, dw1, dw2, dw3;
9576 int vf, pos;
9577 u16 req_id, pf_func;
9578
9579 if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
9580 adapter->num_vfs == 0)
9581 goto skip_bad_vf_detection;
9582
9583 bdev = pdev->bus->self;
9584 while (bdev && (pci_pcie_type(bdev) != PCI_EXP_TYPE_ROOT_PORT))
9585 bdev = bdev->bus->self;
9586
9587 if (!bdev)
9588 goto skip_bad_vf_detection;
9589
9590 pos = pci_find_ext_capability(bdev, PCI_EXT_CAP_ID_ERR);
9591 if (!pos)
9592 goto skip_bad_vf_detection;
9593
9594 dw0 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG);
9595 dw1 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 4);
9596 dw2 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 8);
9597 dw3 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 12);
9598 if (ixgbe_removed(hw->hw_addr))
9599 goto skip_bad_vf_detection;
9600
9601 req_id = dw1 >> 16;
9602 /* On the 82599 if bit 7 of the requestor ID is set then it's a VF */
9603 if (!(req_id & 0x0080))
9604 goto skip_bad_vf_detection;
9605
9606 pf_func = req_id & 0x01;
9607 if ((pf_func & 1) == (pdev->devfn & 1)) {
9608 unsigned int device_id;
9609
9610 vf = (req_id & 0x7F) >> 1;
9611 e_dev_err("VF %d has caused a PCIe error\n", vf);
9612 e_dev_err("TLP: dw0: %8.8x\tdw1: %8.8x\tdw2: "
9613 "%8.8x\tdw3: %8.8x\n",
9614 dw0, dw1, dw2, dw3);
9615 switch (adapter->hw.mac.type) {
9616 case ixgbe_mac_82599EB:
9617 device_id = IXGBE_82599_VF_DEVICE_ID;
9618 break;
9619 case ixgbe_mac_X540:
9620 device_id = IXGBE_X540_VF_DEVICE_ID;
9621 break;
9622 case ixgbe_mac_X550:
9623 device_id = IXGBE_DEV_ID_X550_VF;
9624 break;
9625 case ixgbe_mac_X550EM_x:
9626 device_id = IXGBE_DEV_ID_X550EM_X_VF;
9627 break;
9628 default:
9629 device_id = 0;
9630 break;
9631 }
9632
9633 /* Find the pci device of the offending VF */
9634 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL, device_id, NULL);
9635 while (vfdev) {
9636 if (vfdev->devfn == (req_id & 0xFF))
9637 break;
9638 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL,
9639 device_id, vfdev);
9640 }
9641 /*
9642 * There's a slim chance the VF could have been hot plugged,
9643 * so if it is no longer present we don't need to issue the
9644 * VFLR. Just clean up the AER in that case.
9645 */
9646 if (vfdev) {
9647 ixgbe_issue_vf_flr(adapter, vfdev);
9648 /* Free device reference count */
9649 pci_dev_put(vfdev);
9650 }
9651
9652 pci_cleanup_aer_uncorrect_error_status(pdev);
9653 }
9654
9655 /*
9656 * Even though the error may have occurred on the other port
9657 * we still need to increment the vf error reference count for
9658 * both ports because the I/O resume function will be called
9659 * for both of them.
9660 */
9661 adapter->vferr_refcount++;
9662
9663 return PCI_ERS_RESULT_RECOVERED;
9664
9665 skip_bad_vf_detection:
9666 #endif /* CONFIG_PCI_IOV */
9667 if (!test_bit(__IXGBE_SERVICE_INITED, &adapter->state))
9668 return PCI_ERS_RESULT_DISCONNECT;
9669
9670 rtnl_lock();
9671 netif_device_detach(netdev);
9672
9673 if (state == pci_channel_io_perm_failure) {
9674 rtnl_unlock();
9675 return PCI_ERS_RESULT_DISCONNECT;
9676 }
9677
9678 if (netif_running(netdev))
9679 ixgbe_down(adapter);
9680
9681 if (!test_and_set_bit(__IXGBE_DISABLED, &adapter->state))
9682 pci_disable_device(pdev);
9683 rtnl_unlock();
9684
9685 /* Request a slot reset. */
9686 return PCI_ERS_RESULT_NEED_RESET;
9687 }
9688
9689 /**
9690 * ixgbe_io_slot_reset - called after the pci bus has been reset.
9691 * @pdev: Pointer to PCI device
9692 *
9693 * Restart the card from scratch, as if from a cold-boot.
9694 */
9695 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
9696 {
9697 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
9698 pci_ers_result_t result;
9699 int err;
9700
9701 if (pci_enable_device_mem(pdev)) {
9702 e_err(probe, "Cannot re-enable PCI device after reset.\n");
9703 result = PCI_ERS_RESULT_DISCONNECT;
9704 } else {
9705 smp_mb__before_atomic();
9706 clear_bit(__IXGBE_DISABLED, &adapter->state);
9707 adapter->hw.hw_addr = adapter->io_addr;
9708 pci_set_master(pdev);
9709 pci_restore_state(pdev);
9710 pci_save_state(pdev);
9711
9712 pci_wake_from_d3(pdev, false);
9713
9714 ixgbe_reset(adapter);
9715 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
9716 result = PCI_ERS_RESULT_RECOVERED;
9717 }
9718
9719 err = pci_cleanup_aer_uncorrect_error_status(pdev);
9720 if (err) {
9721 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
9722 "failed 0x%0x\n", err);
9723 /* non-fatal, continue */
9724 }
9725
9726 return result;
9727 }
9728
9729 /**
9730 * ixgbe_io_resume - called when traffic can start flowing again.
9731 * @pdev: Pointer to PCI device
9732 *
9733 * This callback is called when the error recovery driver tells us that
9734 * its OK to resume normal operation.
9735 */
9736 static void ixgbe_io_resume(struct pci_dev *pdev)
9737 {
9738 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
9739 struct net_device *netdev = adapter->netdev;
9740
9741 #ifdef CONFIG_PCI_IOV
9742 if (adapter->vferr_refcount) {
9743 e_info(drv, "Resuming after VF err\n");
9744 adapter->vferr_refcount--;
9745 return;
9746 }
9747
9748 #endif
9749 if (netif_running(netdev))
9750 ixgbe_up(adapter);
9751
9752 netif_device_attach(netdev);
9753 }
9754
9755 static const struct pci_error_handlers ixgbe_err_handler = {
9756 .error_detected = ixgbe_io_error_detected,
9757 .slot_reset = ixgbe_io_slot_reset,
9758 .resume = ixgbe_io_resume,
9759 };
9760
9761 static struct pci_driver ixgbe_driver = {
9762 .name = ixgbe_driver_name,
9763 .id_table = ixgbe_pci_tbl,
9764 .probe = ixgbe_probe,
9765 .remove = ixgbe_remove,
9766 #ifdef CONFIG_PM
9767 .suspend = ixgbe_suspend,
9768 .resume = ixgbe_resume,
9769 #endif
9770 .shutdown = ixgbe_shutdown,
9771 .sriov_configure = ixgbe_pci_sriov_configure,
9772 .err_handler = &ixgbe_err_handler
9773 };
9774
9775 /**
9776 * ixgbe_init_module - Driver Registration Routine
9777 *
9778 * ixgbe_init_module is the first routine called when the driver is
9779 * loaded. All it does is register with the PCI subsystem.
9780 **/
9781 static int __init ixgbe_init_module(void)
9782 {
9783 int ret;
9784 pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
9785 pr_info("%s\n", ixgbe_copyright);
9786
9787 ixgbe_wq = create_singlethread_workqueue(ixgbe_driver_name);
9788 if (!ixgbe_wq) {
9789 pr_err("%s: Failed to create workqueue\n", ixgbe_driver_name);
9790 return -ENOMEM;
9791 }
9792
9793 ixgbe_dbg_init();
9794
9795 ret = pci_register_driver(&ixgbe_driver);
9796 if (ret) {
9797 ixgbe_dbg_exit();
9798 return ret;
9799 }
9800
9801 #ifdef CONFIG_IXGBE_DCA
9802 dca_register_notify(&dca_notifier);
9803 #endif
9804
9805 return 0;
9806 }
9807
9808 module_init(ixgbe_init_module);
9809
9810 /**
9811 * ixgbe_exit_module - Driver Exit Cleanup Routine
9812 *
9813 * ixgbe_exit_module is called just before the driver is removed
9814 * from memory.
9815 **/
9816 static void __exit ixgbe_exit_module(void)
9817 {
9818 #ifdef CONFIG_IXGBE_DCA
9819 dca_unregister_notify(&dca_notifier);
9820 #endif
9821 pci_unregister_driver(&ixgbe_driver);
9822
9823 ixgbe_dbg_exit();
9824 if (ixgbe_wq) {
9825 destroy_workqueue(ixgbe_wq);
9826 ixgbe_wq = NULL;
9827 }
9828 }
9829
9830 #ifdef CONFIG_IXGBE_DCA
9831 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
9832 void *p)
9833 {
9834 int ret_val;
9835
9836 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
9837 __ixgbe_notify_dca);
9838
9839 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
9840 }
9841
9842 #endif /* CONFIG_IXGBE_DCA */
9843
9844 module_exit(ixgbe_exit_module);
9845
9846 /* ixgbe_main.c */
Linux kernel - Deliverables
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