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[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 - 2014 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
54 #ifdef CONFIG_OF
55 #include <linux/of_net.h>
56 #endif
57
58 #ifdef CONFIG_SPARC
59 #include <asm/idprom.h>
60 #include <asm/prom.h>
61 #endif
62
63 #include "ixgbe.h"
64 #include "ixgbe_common.h"
65 #include "ixgbe_dcb_82599.h"
66 #include "ixgbe_sriov.h"
67
68 char ixgbe_driver_name[] = "ixgbe";
69 static const char ixgbe_driver_string[] =
70 "Intel(R) 10 Gigabit PCI Express Network Driver";
71 #ifdef IXGBE_FCOE
72 char ixgbe_default_device_descr[] =
73 "Intel(R) 10 Gigabit Network Connection";
74 #else
75 static char ixgbe_default_device_descr[] =
76 "Intel(R) 10 Gigabit Network Connection";
77 #endif
78 #define DRV_VERSION "4.0.1-k"
79 const char ixgbe_driver_version[] = DRV_VERSION;
80 static const char ixgbe_copyright[] =
81 "Copyright (c) 1999-2014 Intel Corporation.";
82
83 static const struct ixgbe_info *ixgbe_info_tbl[] = {
84 [board_82598] = &ixgbe_82598_info,
85 [board_82599] = &ixgbe_82599_info,
86 [board_X540] = &ixgbe_X540_info,
87 [board_X550] = &ixgbe_X550_info,
88 [board_X550EM_x] = &ixgbe_X550EM_x_info,
89 };
90
91 /* ixgbe_pci_tbl - PCI Device ID Table
92 *
93 * Wildcard entries (PCI_ANY_ID) should come last
94 * Last entry must be all 0s
95 *
96 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
97 * Class, Class Mask, private data (not used) }
98 */
99 static const struct pci_device_id ixgbe_pci_tbl[] = {
100 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598), board_82598 },
101 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT), board_82598 },
102 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT), board_82598 },
103 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT), board_82598 },
104 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2), board_82598 },
105 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4), board_82598 },
106 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT), board_82598 },
107 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT), board_82598 },
108 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM), board_82598 },
109 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR), board_82598 },
110 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM), board_82598 },
111 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX), board_82598 },
112 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4), board_82599 },
113 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM), board_82599 },
114 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR), board_82599 },
115 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP), board_82599 },
116 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM), board_82599 },
117 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ), board_82599 },
118 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4), board_82599 },
119 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_BACKPLANE_FCOE), board_82599 },
120 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_FCOE), board_82599 },
121 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM), board_82599 },
122 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE), board_82599 },
123 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T), board_X540 },
124 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF2), board_82599 },
125 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_LS), board_82599 },
126 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_QSFP_SF_QP), board_82599 },
127 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599EN_SFP), board_82599 },
128 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF_QP), board_82599 },
129 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T1), board_X540 },
130 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550T), board_X550},
131 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_KX4), board_X550EM_x},
132 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_KR), board_X550EM_x},
133 /* required last entry */
134 {0, }
135 };
136 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
137
138 #ifdef CONFIG_IXGBE_DCA
139 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
140 void *p);
141 static struct notifier_block dca_notifier = {
142 .notifier_call = ixgbe_notify_dca,
143 .next = NULL,
144 .priority = 0
145 };
146 #endif
147
148 #ifdef CONFIG_PCI_IOV
149 static unsigned int max_vfs;
150 module_param(max_vfs, uint, 0);
151 MODULE_PARM_DESC(max_vfs,
152 "Maximum number of virtual functions to allocate per physical function - default is zero and maximum value is 63. (Deprecated)");
153 #endif /* CONFIG_PCI_IOV */
154
155 static unsigned int allow_unsupported_sfp;
156 module_param(allow_unsupported_sfp, uint, 0);
157 MODULE_PARM_DESC(allow_unsupported_sfp,
158 "Allow unsupported and untested SFP+ modules on 82599-based adapters");
159
160 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
161 static int debug = -1;
162 module_param(debug, int, 0);
163 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
164
165 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
166 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
167 MODULE_LICENSE("GPL");
168 MODULE_VERSION(DRV_VERSION);
169
170 static bool ixgbe_check_cfg_remove(struct ixgbe_hw *hw, struct pci_dev *pdev);
171
172 static int ixgbe_read_pci_cfg_word_parent(struct ixgbe_adapter *adapter,
173 u32 reg, u16 *value)
174 {
175 struct pci_dev *parent_dev;
176 struct pci_bus *parent_bus;
177
178 parent_bus = adapter->pdev->bus->parent;
179 if (!parent_bus)
180 return -1;
181
182 parent_dev = parent_bus->self;
183 if (!parent_dev)
184 return -1;
185
186 if (!pci_is_pcie(parent_dev))
187 return -1;
188
189 pcie_capability_read_word(parent_dev, reg, value);
190 if (*value == IXGBE_FAILED_READ_CFG_WORD &&
191 ixgbe_check_cfg_remove(&adapter->hw, parent_dev))
192 return -1;
193 return 0;
194 }
195
196 static s32 ixgbe_get_parent_bus_info(struct ixgbe_adapter *adapter)
197 {
198 struct ixgbe_hw *hw = &adapter->hw;
199 u16 link_status = 0;
200 int err;
201
202 hw->bus.type = ixgbe_bus_type_pci_express;
203
204 /* Get the negotiated link width and speed from PCI config space of the
205 * parent, as this device is behind a switch
206 */
207 err = ixgbe_read_pci_cfg_word_parent(adapter, 18, &link_status);
208
209 /* assume caller will handle error case */
210 if (err)
211 return err;
212
213 hw->bus.width = ixgbe_convert_bus_width(link_status);
214 hw->bus.speed = ixgbe_convert_bus_speed(link_status);
215
216 return 0;
217 }
218
219 /**
220 * ixgbe_check_from_parent - Determine whether PCIe info should come from parent
221 * @hw: hw specific details
222 *
223 * This function is used by probe to determine whether a device's PCI-Express
224 * bandwidth details should be gathered from the parent bus instead of from the
225 * device. Used to ensure that various locations all have the correct device ID
226 * checks.
227 */
228 static inline bool ixgbe_pcie_from_parent(struct ixgbe_hw *hw)
229 {
230 switch (hw->device_id) {
231 case IXGBE_DEV_ID_82599_SFP_SF_QP:
232 case IXGBE_DEV_ID_82599_QSFP_SF_QP:
233 return true;
234 default:
235 return false;
236 }
237 }
238
239 static void ixgbe_check_minimum_link(struct ixgbe_adapter *adapter,
240 int expected_gts)
241 {
242 int max_gts = 0;
243 enum pci_bus_speed speed = PCI_SPEED_UNKNOWN;
244 enum pcie_link_width width = PCIE_LNK_WIDTH_UNKNOWN;
245 struct pci_dev *pdev;
246
247 /* determine whether to use the the parent device
248 */
249 if (ixgbe_pcie_from_parent(&adapter->hw))
250 pdev = adapter->pdev->bus->parent->self;
251 else
252 pdev = adapter->pdev;
253
254 if (pcie_get_minimum_link(pdev, &speed, &width) ||
255 speed == PCI_SPEED_UNKNOWN || width == PCIE_LNK_WIDTH_UNKNOWN) {
256 e_dev_warn("Unable to determine PCI Express bandwidth.\n");
257 return;
258 }
259
260 switch (speed) {
261 case PCIE_SPEED_2_5GT:
262 /* 8b/10b encoding reduces max throughput by 20% */
263 max_gts = 2 * width;
264 break;
265 case PCIE_SPEED_5_0GT:
266 /* 8b/10b encoding reduces max throughput by 20% */
267 max_gts = 4 * width;
268 break;
269 case PCIE_SPEED_8_0GT:
270 /* 128b/130b encoding reduces throughput by less than 2% */
271 max_gts = 8 * width;
272 break;
273 default:
274 e_dev_warn("Unable to determine PCI Express bandwidth.\n");
275 return;
276 }
277
278 e_dev_info("PCI Express bandwidth of %dGT/s available\n",
279 max_gts);
280 e_dev_info("(Speed:%s, Width: x%d, Encoding Loss:%s)\n",
281 (speed == PCIE_SPEED_8_0GT ? "8.0GT/s" :
282 speed == PCIE_SPEED_5_0GT ? "5.0GT/s" :
283 speed == PCIE_SPEED_2_5GT ? "2.5GT/s" :
284 "Unknown"),
285 width,
286 (speed == PCIE_SPEED_2_5GT ? "20%" :
287 speed == PCIE_SPEED_5_0GT ? "20%" :
288 speed == PCIE_SPEED_8_0GT ? "<2%" :
289 "Unknown"));
290
291 if (max_gts < expected_gts) {
292 e_dev_warn("This is not sufficient for optimal performance of this card.\n");
293 e_dev_warn("For optimal performance, at least %dGT/s of bandwidth is required.\n",
294 expected_gts);
295 e_dev_warn("A slot with more lanes and/or higher speed is suggested.\n");
296 }
297 }
298
299 static void ixgbe_service_event_schedule(struct ixgbe_adapter *adapter)
300 {
301 if (!test_bit(__IXGBE_DOWN, &adapter->state) &&
302 !test_bit(__IXGBE_REMOVING, &adapter->state) &&
303 !test_and_set_bit(__IXGBE_SERVICE_SCHED, &adapter->state))
304 schedule_work(&adapter->service_task);
305 }
306
307 static void ixgbe_remove_adapter(struct ixgbe_hw *hw)
308 {
309 struct ixgbe_adapter *adapter = hw->back;
310
311 if (!hw->hw_addr)
312 return;
313 hw->hw_addr = NULL;
314 e_dev_err("Adapter removed\n");
315 if (test_bit(__IXGBE_SERVICE_INITED, &adapter->state))
316 ixgbe_service_event_schedule(adapter);
317 }
318
319 static void ixgbe_check_remove(struct ixgbe_hw *hw, u32 reg)
320 {
321 u32 value;
322
323 /* The following check not only optimizes a bit by not
324 * performing a read on the status register when the
325 * register just read was a status register read that
326 * returned IXGBE_FAILED_READ_REG. It also blocks any
327 * potential recursion.
328 */
329 if (reg == IXGBE_STATUS) {
330 ixgbe_remove_adapter(hw);
331 return;
332 }
333 value = ixgbe_read_reg(hw, IXGBE_STATUS);
334 if (value == IXGBE_FAILED_READ_REG)
335 ixgbe_remove_adapter(hw);
336 }
337
338 /**
339 * ixgbe_read_reg - Read from device register
340 * @hw: hw specific details
341 * @reg: offset of register to read
342 *
343 * Returns : value read or IXGBE_FAILED_READ_REG if removed
344 *
345 * This function is used to read device registers. It checks for device
346 * removal by confirming any read that returns all ones by checking the
347 * status register value for all ones. This function avoids reading from
348 * the hardware if a removal was previously detected in which case it
349 * returns IXGBE_FAILED_READ_REG (all ones).
350 */
351 u32 ixgbe_read_reg(struct ixgbe_hw *hw, u32 reg)
352 {
353 u8 __iomem *reg_addr = ACCESS_ONCE(hw->hw_addr);
354 u32 value;
355
356 if (ixgbe_removed(reg_addr))
357 return IXGBE_FAILED_READ_REG;
358 value = readl(reg_addr + reg);
359 if (unlikely(value == IXGBE_FAILED_READ_REG))
360 ixgbe_check_remove(hw, reg);
361 return value;
362 }
363
364 static bool ixgbe_check_cfg_remove(struct ixgbe_hw *hw, struct pci_dev *pdev)
365 {
366 u16 value;
367
368 pci_read_config_word(pdev, PCI_VENDOR_ID, &value);
369 if (value == IXGBE_FAILED_READ_CFG_WORD) {
370 ixgbe_remove_adapter(hw);
371 return true;
372 }
373 return false;
374 }
375
376 u16 ixgbe_read_pci_cfg_word(struct ixgbe_hw *hw, u32 reg)
377 {
378 struct ixgbe_adapter *adapter = hw->back;
379 u16 value;
380
381 if (ixgbe_removed(hw->hw_addr))
382 return IXGBE_FAILED_READ_CFG_WORD;
383 pci_read_config_word(adapter->pdev, reg, &value);
384 if (value == IXGBE_FAILED_READ_CFG_WORD &&
385 ixgbe_check_cfg_remove(hw, adapter->pdev))
386 return IXGBE_FAILED_READ_CFG_WORD;
387 return value;
388 }
389
390 #ifdef CONFIG_PCI_IOV
391 static u32 ixgbe_read_pci_cfg_dword(struct ixgbe_hw *hw, u32 reg)
392 {
393 struct ixgbe_adapter *adapter = hw->back;
394 u32 value;
395
396 if (ixgbe_removed(hw->hw_addr))
397 return IXGBE_FAILED_READ_CFG_DWORD;
398 pci_read_config_dword(adapter->pdev, reg, &value);
399 if (value == IXGBE_FAILED_READ_CFG_DWORD &&
400 ixgbe_check_cfg_remove(hw, adapter->pdev))
401 return IXGBE_FAILED_READ_CFG_DWORD;
402 return value;
403 }
404 #endif /* CONFIG_PCI_IOV */
405
406 void ixgbe_write_pci_cfg_word(struct ixgbe_hw *hw, u32 reg, u16 value)
407 {
408 struct ixgbe_adapter *adapter = hw->back;
409
410 if (ixgbe_removed(hw->hw_addr))
411 return;
412 pci_write_config_word(adapter->pdev, reg, value);
413 }
414
415 static void ixgbe_service_event_complete(struct ixgbe_adapter *adapter)
416 {
417 BUG_ON(!test_bit(__IXGBE_SERVICE_SCHED, &adapter->state));
418
419 /* flush memory to make sure state is correct before next watchdog */
420 smp_mb__before_atomic();
421 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
422 }
423
424 struct ixgbe_reg_info {
425 u32 ofs;
426 char *name;
427 };
428
429 static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {
430
431 /* General Registers */
432 {IXGBE_CTRL, "CTRL"},
433 {IXGBE_STATUS, "STATUS"},
434 {IXGBE_CTRL_EXT, "CTRL_EXT"},
435
436 /* Interrupt Registers */
437 {IXGBE_EICR, "EICR"},
438
439 /* RX Registers */
440 {IXGBE_SRRCTL(0), "SRRCTL"},
441 {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
442 {IXGBE_RDLEN(0), "RDLEN"},
443 {IXGBE_RDH(0), "RDH"},
444 {IXGBE_RDT(0), "RDT"},
445 {IXGBE_RXDCTL(0), "RXDCTL"},
446 {IXGBE_RDBAL(0), "RDBAL"},
447 {IXGBE_RDBAH(0), "RDBAH"},
448
449 /* TX Registers */
450 {IXGBE_TDBAL(0), "TDBAL"},
451 {IXGBE_TDBAH(0), "TDBAH"},
452 {IXGBE_TDLEN(0), "TDLEN"},
453 {IXGBE_TDH(0), "TDH"},
454 {IXGBE_TDT(0), "TDT"},
455 {IXGBE_TXDCTL(0), "TXDCTL"},
456
457 /* List Terminator */
458 { .name = NULL }
459 };
460
461
462 /*
463 * ixgbe_regdump - register printout routine
464 */
465 static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
466 {
467 int i = 0, j = 0;
468 char rname[16];
469 u32 regs[64];
470
471 switch (reginfo->ofs) {
472 case IXGBE_SRRCTL(0):
473 for (i = 0; i < 64; i++)
474 regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
475 break;
476 case IXGBE_DCA_RXCTRL(0):
477 for (i = 0; i < 64; i++)
478 regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
479 break;
480 case IXGBE_RDLEN(0):
481 for (i = 0; i < 64; i++)
482 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
483 break;
484 case IXGBE_RDH(0):
485 for (i = 0; i < 64; i++)
486 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
487 break;
488 case IXGBE_RDT(0):
489 for (i = 0; i < 64; i++)
490 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
491 break;
492 case IXGBE_RXDCTL(0):
493 for (i = 0; i < 64; i++)
494 regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
495 break;
496 case IXGBE_RDBAL(0):
497 for (i = 0; i < 64; i++)
498 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
499 break;
500 case IXGBE_RDBAH(0):
501 for (i = 0; i < 64; i++)
502 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
503 break;
504 case IXGBE_TDBAL(0):
505 for (i = 0; i < 64; i++)
506 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
507 break;
508 case IXGBE_TDBAH(0):
509 for (i = 0; i < 64; i++)
510 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
511 break;
512 case IXGBE_TDLEN(0):
513 for (i = 0; i < 64; i++)
514 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
515 break;
516 case IXGBE_TDH(0):
517 for (i = 0; i < 64; i++)
518 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
519 break;
520 case IXGBE_TDT(0):
521 for (i = 0; i < 64; i++)
522 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
523 break;
524 case IXGBE_TXDCTL(0):
525 for (i = 0; i < 64; i++)
526 regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
527 break;
528 default:
529 pr_info("%-15s %08x\n", reginfo->name,
530 IXGBE_READ_REG(hw, reginfo->ofs));
531 return;
532 }
533
534 for (i = 0; i < 8; i++) {
535 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7);
536 pr_err("%-15s", rname);
537 for (j = 0; j < 8; j++)
538 pr_cont(" %08x", regs[i*8+j]);
539 pr_cont("\n");
540 }
541
542 }
543
544 /*
545 * ixgbe_dump - Print registers, tx-rings and rx-rings
546 */
547 static void ixgbe_dump(struct ixgbe_adapter *adapter)
548 {
549 struct net_device *netdev = adapter->netdev;
550 struct ixgbe_hw *hw = &adapter->hw;
551 struct ixgbe_reg_info *reginfo;
552 int n = 0;
553 struct ixgbe_ring *tx_ring;
554 struct ixgbe_tx_buffer *tx_buffer;
555 union ixgbe_adv_tx_desc *tx_desc;
556 struct my_u0 { u64 a; u64 b; } *u0;
557 struct ixgbe_ring *rx_ring;
558 union ixgbe_adv_rx_desc *rx_desc;
559 struct ixgbe_rx_buffer *rx_buffer_info;
560 u32 staterr;
561 int i = 0;
562
563 if (!netif_msg_hw(adapter))
564 return;
565
566 /* Print netdevice Info */
567 if (netdev) {
568 dev_info(&adapter->pdev->dev, "Net device Info\n");
569 pr_info("Device Name state "
570 "trans_start last_rx\n");
571 pr_info("%-15s %016lX %016lX %016lX\n",
572 netdev->name,
573 netdev->state,
574 netdev->trans_start,
575 netdev->last_rx);
576 }
577
578 /* Print Registers */
579 dev_info(&adapter->pdev->dev, "Register Dump\n");
580 pr_info(" Register Name Value\n");
581 for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
582 reginfo->name; reginfo++) {
583 ixgbe_regdump(hw, reginfo);
584 }
585
586 /* Print TX Ring Summary */
587 if (!netdev || !netif_running(netdev))
588 return;
589
590 dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
591 pr_info(" %s %s %s %s\n",
592 "Queue [NTU] [NTC] [bi(ntc)->dma ]",
593 "leng", "ntw", "timestamp");
594 for (n = 0; n < adapter->num_tx_queues; n++) {
595 tx_ring = adapter->tx_ring[n];
596 tx_buffer = &tx_ring->tx_buffer_info[tx_ring->next_to_clean];
597 pr_info(" %5d %5X %5X %016llX %08X %p %016llX\n",
598 n, tx_ring->next_to_use, tx_ring->next_to_clean,
599 (u64)dma_unmap_addr(tx_buffer, dma),
600 dma_unmap_len(tx_buffer, len),
601 tx_buffer->next_to_watch,
602 (u64)tx_buffer->time_stamp);
603 }
604
605 /* Print TX Rings */
606 if (!netif_msg_tx_done(adapter))
607 goto rx_ring_summary;
608
609 dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
610
611 /* Transmit Descriptor Formats
612 *
613 * 82598 Advanced Transmit Descriptor
614 * +--------------------------------------------------------------+
615 * 0 | Buffer Address [63:0] |
616 * +--------------------------------------------------------------+
617 * 8 | PAYLEN | POPTS | IDX | STA | DCMD |DTYP | RSV | DTALEN |
618 * +--------------------------------------------------------------+
619 * 63 46 45 40 39 36 35 32 31 24 23 20 19 0
620 *
621 * 82598 Advanced Transmit Descriptor (Write-Back Format)
622 * +--------------------------------------------------------------+
623 * 0 | RSV [63:0] |
624 * +--------------------------------------------------------------+
625 * 8 | RSV | STA | NXTSEQ |
626 * +--------------------------------------------------------------+
627 * 63 36 35 32 31 0
628 *
629 * 82599+ Advanced Transmit Descriptor
630 * +--------------------------------------------------------------+
631 * 0 | Buffer Address [63:0] |
632 * +--------------------------------------------------------------+
633 * 8 |PAYLEN |POPTS|CC|IDX |STA |DCMD |DTYP |MAC |RSV |DTALEN |
634 * +--------------------------------------------------------------+
635 * 63 46 45 40 39 38 36 35 32 31 24 23 20 19 18 17 16 15 0
636 *
637 * 82599+ Advanced Transmit Descriptor (Write-Back Format)
638 * +--------------------------------------------------------------+
639 * 0 | RSV [63:0] |
640 * +--------------------------------------------------------------+
641 * 8 | RSV | STA | RSV |
642 * +--------------------------------------------------------------+
643 * 63 36 35 32 31 0
644 */
645
646 for (n = 0; n < adapter->num_tx_queues; n++) {
647 tx_ring = adapter->tx_ring[n];
648 pr_info("------------------------------------\n");
649 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index);
650 pr_info("------------------------------------\n");
651 pr_info("%s%s %s %s %s %s\n",
652 "T [desc] [address 63:0 ] ",
653 "[PlPOIdStDDt Ln] [bi->dma ] ",
654 "leng", "ntw", "timestamp", "bi->skb");
655
656 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
657 tx_desc = IXGBE_TX_DESC(tx_ring, i);
658 tx_buffer = &tx_ring->tx_buffer_info[i];
659 u0 = (struct my_u0 *)tx_desc;
660 if (dma_unmap_len(tx_buffer, len) > 0) {
661 pr_info("T [0x%03X] %016llX %016llX %016llX %08X %p %016llX %p",
662 i,
663 le64_to_cpu(u0->a),
664 le64_to_cpu(u0->b),
665 (u64)dma_unmap_addr(tx_buffer, dma),
666 dma_unmap_len(tx_buffer, len),
667 tx_buffer->next_to_watch,
668 (u64)tx_buffer->time_stamp,
669 tx_buffer->skb);
670 if (i == tx_ring->next_to_use &&
671 i == tx_ring->next_to_clean)
672 pr_cont(" NTC/U\n");
673 else if (i == tx_ring->next_to_use)
674 pr_cont(" NTU\n");
675 else if (i == tx_ring->next_to_clean)
676 pr_cont(" NTC\n");
677 else
678 pr_cont("\n");
679
680 if (netif_msg_pktdata(adapter) &&
681 tx_buffer->skb)
682 print_hex_dump(KERN_INFO, "",
683 DUMP_PREFIX_ADDRESS, 16, 1,
684 tx_buffer->skb->data,
685 dma_unmap_len(tx_buffer, len),
686 true);
687 }
688 }
689 }
690
691 /* Print RX Rings Summary */
692 rx_ring_summary:
693 dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
694 pr_info("Queue [NTU] [NTC]\n");
695 for (n = 0; n < adapter->num_rx_queues; n++) {
696 rx_ring = adapter->rx_ring[n];
697 pr_info("%5d %5X %5X\n",
698 n, rx_ring->next_to_use, rx_ring->next_to_clean);
699 }
700
701 /* Print RX Rings */
702 if (!netif_msg_rx_status(adapter))
703 return;
704
705 dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
706
707 /* Receive Descriptor Formats
708 *
709 * 82598 Advanced Receive Descriptor (Read) Format
710 * 63 1 0
711 * +-----------------------------------------------------+
712 * 0 | Packet Buffer Address [63:1] |A0/NSE|
713 * +----------------------------------------------+------+
714 * 8 | Header Buffer Address [63:1] | DD |
715 * +-----------------------------------------------------+
716 *
717 *
718 * 82598 Advanced Receive Descriptor (Write-Back) Format
719 *
720 * 63 48 47 32 31 30 21 20 16 15 4 3 0
721 * +------------------------------------------------------+
722 * 0 | RSS Hash / |SPH| HDR_LEN | RSV |Packet| RSS |
723 * | Packet | IP | | | | Type | Type |
724 * | Checksum | Ident | | | | | |
725 * +------------------------------------------------------+
726 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
727 * +------------------------------------------------------+
728 * 63 48 47 32 31 20 19 0
729 *
730 * 82599+ Advanced Receive Descriptor (Read) Format
731 * 63 1 0
732 * +-----------------------------------------------------+
733 * 0 | Packet Buffer Address [63:1] |A0/NSE|
734 * +----------------------------------------------+------+
735 * 8 | Header Buffer Address [63:1] | DD |
736 * +-----------------------------------------------------+
737 *
738 *
739 * 82599+ Advanced Receive Descriptor (Write-Back) Format
740 *
741 * 63 48 47 32 31 30 21 20 17 16 4 3 0
742 * +------------------------------------------------------+
743 * 0 |RSS / Frag Checksum|SPH| HDR_LEN |RSC- |Packet| RSS |
744 * |/ RTT / PCoE_PARAM | | | CNT | Type | Type |
745 * |/ Flow Dir Flt ID | | | | | |
746 * +------------------------------------------------------+
747 * 8 | VLAN Tag | Length |Extended Error| Xtnd Status/NEXTP |
748 * +------------------------------------------------------+
749 * 63 48 47 32 31 20 19 0
750 */
751
752 for (n = 0; n < adapter->num_rx_queues; n++) {
753 rx_ring = adapter->rx_ring[n];
754 pr_info("------------------------------------\n");
755 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index);
756 pr_info("------------------------------------\n");
757 pr_info("%s%s%s",
758 "R [desc] [ PktBuf A0] ",
759 "[ HeadBuf DD] [bi->dma ] [bi->skb ] ",
760 "<-- Adv Rx Read format\n");
761 pr_info("%s%s%s",
762 "RWB[desc] [PcsmIpSHl PtRs] ",
763 "[vl er S cks ln] ---------------- [bi->skb ] ",
764 "<-- Adv Rx Write-Back format\n");
765
766 for (i = 0; i < rx_ring->count; i++) {
767 rx_buffer_info = &rx_ring->rx_buffer_info[i];
768 rx_desc = IXGBE_RX_DESC(rx_ring, i);
769 u0 = (struct my_u0 *)rx_desc;
770 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
771 if (staterr & IXGBE_RXD_STAT_DD) {
772 /* Descriptor Done */
773 pr_info("RWB[0x%03X] %016llX "
774 "%016llX ---------------- %p", i,
775 le64_to_cpu(u0->a),
776 le64_to_cpu(u0->b),
777 rx_buffer_info->skb);
778 } else {
779 pr_info("R [0x%03X] %016llX "
780 "%016llX %016llX %p", i,
781 le64_to_cpu(u0->a),
782 le64_to_cpu(u0->b),
783 (u64)rx_buffer_info->dma,
784 rx_buffer_info->skb);
785
786 if (netif_msg_pktdata(adapter) &&
787 rx_buffer_info->dma) {
788 print_hex_dump(KERN_INFO, "",
789 DUMP_PREFIX_ADDRESS, 16, 1,
790 page_address(rx_buffer_info->page) +
791 rx_buffer_info->page_offset,
792 ixgbe_rx_bufsz(rx_ring), true);
793 }
794 }
795
796 if (i == rx_ring->next_to_use)
797 pr_cont(" NTU\n");
798 else if (i == rx_ring->next_to_clean)
799 pr_cont(" NTC\n");
800 else
801 pr_cont("\n");
802
803 }
804 }
805 }
806
807 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
808 {
809 u32 ctrl_ext;
810
811 /* Let firmware take over control of h/w */
812 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
813 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
814 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
815 }
816
817 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
818 {
819 u32 ctrl_ext;
820
821 /* Let firmware know the driver has taken over */
822 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
823 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
824 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
825 }
826
827 /**
828 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
829 * @adapter: pointer to adapter struct
830 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
831 * @queue: queue to map the corresponding interrupt to
832 * @msix_vector: the vector to map to the corresponding queue
833 *
834 */
835 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
836 u8 queue, u8 msix_vector)
837 {
838 u32 ivar, index;
839 struct ixgbe_hw *hw = &adapter->hw;
840 switch (hw->mac.type) {
841 case ixgbe_mac_82598EB:
842 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
843 if (direction == -1)
844 direction = 0;
845 index = (((direction * 64) + queue) >> 2) & 0x1F;
846 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
847 ivar &= ~(0xFF << (8 * (queue & 0x3)));
848 ivar |= (msix_vector << (8 * (queue & 0x3)));
849 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
850 break;
851 case ixgbe_mac_82599EB:
852 case ixgbe_mac_X540:
853 case ixgbe_mac_X550:
854 case ixgbe_mac_X550EM_x:
855 if (direction == -1) {
856 /* other causes */
857 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
858 index = ((queue & 1) * 8);
859 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
860 ivar &= ~(0xFF << index);
861 ivar |= (msix_vector << index);
862 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
863 break;
864 } else {
865 /* tx or rx causes */
866 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
867 index = ((16 * (queue & 1)) + (8 * direction));
868 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
869 ivar &= ~(0xFF << index);
870 ivar |= (msix_vector << index);
871 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
872 break;
873 }
874 default:
875 break;
876 }
877 }
878
879 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
880 u64 qmask)
881 {
882 u32 mask;
883
884 switch (adapter->hw.mac.type) {
885 case ixgbe_mac_82598EB:
886 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
887 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
888 break;
889 case ixgbe_mac_82599EB:
890 case ixgbe_mac_X540:
891 case ixgbe_mac_X550:
892 case ixgbe_mac_X550EM_x:
893 mask = (qmask & 0xFFFFFFFF);
894 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
895 mask = (qmask >> 32);
896 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
897 break;
898 default:
899 break;
900 }
901 }
902
903 void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *ring,
904 struct ixgbe_tx_buffer *tx_buffer)
905 {
906 if (tx_buffer->skb) {
907 dev_kfree_skb_any(tx_buffer->skb);
908 if (dma_unmap_len(tx_buffer, len))
909 dma_unmap_single(ring->dev,
910 dma_unmap_addr(tx_buffer, dma),
911 dma_unmap_len(tx_buffer, len),
912 DMA_TO_DEVICE);
913 } else if (dma_unmap_len(tx_buffer, len)) {
914 dma_unmap_page(ring->dev,
915 dma_unmap_addr(tx_buffer, dma),
916 dma_unmap_len(tx_buffer, len),
917 DMA_TO_DEVICE);
918 }
919 tx_buffer->next_to_watch = NULL;
920 tx_buffer->skb = NULL;
921 dma_unmap_len_set(tx_buffer, len, 0);
922 /* tx_buffer must be completely set up in the transmit path */
923 }
924
925 static void ixgbe_update_xoff_rx_lfc(struct ixgbe_adapter *adapter)
926 {
927 struct ixgbe_hw *hw = &adapter->hw;
928 struct ixgbe_hw_stats *hwstats = &adapter->stats;
929 int i;
930 u32 data;
931
932 if ((hw->fc.current_mode != ixgbe_fc_full) &&
933 (hw->fc.current_mode != ixgbe_fc_rx_pause))
934 return;
935
936 switch (hw->mac.type) {
937 case ixgbe_mac_82598EB:
938 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
939 break;
940 default:
941 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
942 }
943 hwstats->lxoffrxc += data;
944
945 /* refill credits (no tx hang) if we received xoff */
946 if (!data)
947 return;
948
949 for (i = 0; i < adapter->num_tx_queues; i++)
950 clear_bit(__IXGBE_HANG_CHECK_ARMED,
951 &adapter->tx_ring[i]->state);
952 }
953
954 static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter)
955 {
956 struct ixgbe_hw *hw = &adapter->hw;
957 struct ixgbe_hw_stats *hwstats = &adapter->stats;
958 u32 xoff[8] = {0};
959 u8 tc;
960 int i;
961 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
962
963 if (adapter->ixgbe_ieee_pfc)
964 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
965
966 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED) || !pfc_en) {
967 ixgbe_update_xoff_rx_lfc(adapter);
968 return;
969 }
970
971 /* update stats for each tc, only valid with PFC enabled */
972 for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) {
973 u32 pxoffrxc;
974
975 switch (hw->mac.type) {
976 case ixgbe_mac_82598EB:
977 pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
978 break;
979 default:
980 pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
981 }
982 hwstats->pxoffrxc[i] += pxoffrxc;
983 /* Get the TC for given UP */
984 tc = netdev_get_prio_tc_map(adapter->netdev, i);
985 xoff[tc] += pxoffrxc;
986 }
987
988 /* disarm tx queues that have received xoff frames */
989 for (i = 0; i < adapter->num_tx_queues; i++) {
990 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
991
992 tc = tx_ring->dcb_tc;
993 if (xoff[tc])
994 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
995 }
996 }
997
998 static u64 ixgbe_get_tx_completed(struct ixgbe_ring *ring)
999 {
1000 return ring->stats.packets;
1001 }
1002
1003 static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring)
1004 {
1005 struct ixgbe_adapter *adapter;
1006 struct ixgbe_hw *hw;
1007 u32 head, tail;
1008
1009 if (ring->l2_accel_priv)
1010 adapter = ring->l2_accel_priv->real_adapter;
1011 else
1012 adapter = netdev_priv(ring->netdev);
1013
1014 hw = &adapter->hw;
1015 head = IXGBE_READ_REG(hw, IXGBE_TDH(ring->reg_idx));
1016 tail = IXGBE_READ_REG(hw, IXGBE_TDT(ring->reg_idx));
1017
1018 if (head != tail)
1019 return (head < tail) ?
1020 tail - head : (tail + ring->count - head);
1021
1022 return 0;
1023 }
1024
1025 static inline bool ixgbe_check_tx_hang(struct ixgbe_ring *tx_ring)
1026 {
1027 u32 tx_done = ixgbe_get_tx_completed(tx_ring);
1028 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
1029 u32 tx_pending = ixgbe_get_tx_pending(tx_ring);
1030
1031 clear_check_for_tx_hang(tx_ring);
1032
1033 /*
1034 * Check for a hung queue, but be thorough. This verifies
1035 * that a transmit has been completed since the previous
1036 * check AND there is at least one packet pending. The
1037 * ARMED bit is set to indicate a potential hang. The
1038 * bit is cleared if a pause frame is received to remove
1039 * false hang detection due to PFC or 802.3x frames. By
1040 * requiring this to fail twice we avoid races with
1041 * pfc clearing the ARMED bit and conditions where we
1042 * run the check_tx_hang logic with a transmit completion
1043 * pending but without time to complete it yet.
1044 */
1045 if (tx_done_old == tx_done && tx_pending)
1046 /* make sure it is true for two checks in a row */
1047 return test_and_set_bit(__IXGBE_HANG_CHECK_ARMED,
1048 &tx_ring->state);
1049 /* update completed stats and continue */
1050 tx_ring->tx_stats.tx_done_old = tx_done;
1051 /* reset the countdown */
1052 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
1053
1054 return false;
1055 }
1056
1057 /**
1058 * ixgbe_tx_timeout_reset - initiate reset due to Tx timeout
1059 * @adapter: driver private struct
1060 **/
1061 static void ixgbe_tx_timeout_reset(struct ixgbe_adapter *adapter)
1062 {
1063
1064 /* Do the reset outside of interrupt context */
1065 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1066 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
1067 e_warn(drv, "initiating reset due to tx timeout\n");
1068 ixgbe_service_event_schedule(adapter);
1069 }
1070 }
1071
1072 /**
1073 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
1074 * @q_vector: structure containing interrupt and ring information
1075 * @tx_ring: tx ring to clean
1076 **/
1077 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
1078 struct ixgbe_ring *tx_ring)
1079 {
1080 struct ixgbe_adapter *adapter = q_vector->adapter;
1081 struct ixgbe_tx_buffer *tx_buffer;
1082 union ixgbe_adv_tx_desc *tx_desc;
1083 unsigned int total_bytes = 0, total_packets = 0;
1084 unsigned int budget = q_vector->tx.work_limit;
1085 unsigned int i = tx_ring->next_to_clean;
1086
1087 if (test_bit(__IXGBE_DOWN, &adapter->state))
1088 return true;
1089
1090 tx_buffer = &tx_ring->tx_buffer_info[i];
1091 tx_desc = IXGBE_TX_DESC(tx_ring, i);
1092 i -= tx_ring->count;
1093
1094 do {
1095 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
1096
1097 /* if next_to_watch is not set then there is no work pending */
1098 if (!eop_desc)
1099 break;
1100
1101 /* prevent any other reads prior to eop_desc */
1102 read_barrier_depends();
1103
1104 /* if DD is not set pending work has not been completed */
1105 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
1106 break;
1107
1108 /* clear next_to_watch to prevent false hangs */
1109 tx_buffer->next_to_watch = NULL;
1110
1111 /* update the statistics for this packet */
1112 total_bytes += tx_buffer->bytecount;
1113 total_packets += tx_buffer->gso_segs;
1114
1115 /* free the skb */
1116 dev_consume_skb_any(tx_buffer->skb);
1117
1118 /* unmap skb header data */
1119 dma_unmap_single(tx_ring->dev,
1120 dma_unmap_addr(tx_buffer, dma),
1121 dma_unmap_len(tx_buffer, len),
1122 DMA_TO_DEVICE);
1123
1124 /* clear tx_buffer data */
1125 tx_buffer->skb = NULL;
1126 dma_unmap_len_set(tx_buffer, len, 0);
1127
1128 /* unmap remaining buffers */
1129 while (tx_desc != eop_desc) {
1130 tx_buffer++;
1131 tx_desc++;
1132 i++;
1133 if (unlikely(!i)) {
1134 i -= tx_ring->count;
1135 tx_buffer = tx_ring->tx_buffer_info;
1136 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
1137 }
1138
1139 /* unmap any remaining paged data */
1140 if (dma_unmap_len(tx_buffer, len)) {
1141 dma_unmap_page(tx_ring->dev,
1142 dma_unmap_addr(tx_buffer, dma),
1143 dma_unmap_len(tx_buffer, len),
1144 DMA_TO_DEVICE);
1145 dma_unmap_len_set(tx_buffer, len, 0);
1146 }
1147 }
1148
1149 /* move us one more past the eop_desc for start of next pkt */
1150 tx_buffer++;
1151 tx_desc++;
1152 i++;
1153 if (unlikely(!i)) {
1154 i -= tx_ring->count;
1155 tx_buffer = tx_ring->tx_buffer_info;
1156 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
1157 }
1158
1159 /* issue prefetch for next Tx descriptor */
1160 prefetch(tx_desc);
1161
1162 /* update budget accounting */
1163 budget--;
1164 } while (likely(budget));
1165
1166 i += tx_ring->count;
1167 tx_ring->next_to_clean = i;
1168 u64_stats_update_begin(&tx_ring->syncp);
1169 tx_ring->stats.bytes += total_bytes;
1170 tx_ring->stats.packets += total_packets;
1171 u64_stats_update_end(&tx_ring->syncp);
1172 q_vector->tx.total_bytes += total_bytes;
1173 q_vector->tx.total_packets += total_packets;
1174
1175 if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring)) {
1176 /* schedule immediate reset if we believe we hung */
1177 struct ixgbe_hw *hw = &adapter->hw;
1178 e_err(drv, "Detected Tx Unit Hang\n"
1179 " Tx Queue <%d>\n"
1180 " TDH, TDT <%x>, <%x>\n"
1181 " next_to_use <%x>\n"
1182 " next_to_clean <%x>\n"
1183 "tx_buffer_info[next_to_clean]\n"
1184 " time_stamp <%lx>\n"
1185 " jiffies <%lx>\n",
1186 tx_ring->queue_index,
1187 IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)),
1188 IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)),
1189 tx_ring->next_to_use, i,
1190 tx_ring->tx_buffer_info[i].time_stamp, jiffies);
1191
1192 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
1193
1194 e_info(probe,
1195 "tx hang %d detected on queue %d, resetting adapter\n",
1196 adapter->tx_timeout_count + 1, tx_ring->queue_index);
1197
1198 /* schedule immediate reset if we believe we hung */
1199 ixgbe_tx_timeout_reset(adapter);
1200
1201 /* the adapter is about to reset, no point in enabling stuff */
1202 return true;
1203 }
1204
1205 netdev_tx_completed_queue(txring_txq(tx_ring),
1206 total_packets, total_bytes);
1207
1208 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
1209 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
1210 (ixgbe_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
1211 /* Make sure that anybody stopping the queue after this
1212 * sees the new next_to_clean.
1213 */
1214 smp_mb();
1215 if (__netif_subqueue_stopped(tx_ring->netdev,
1216 tx_ring->queue_index)
1217 && !test_bit(__IXGBE_DOWN, &adapter->state)) {
1218 netif_wake_subqueue(tx_ring->netdev,
1219 tx_ring->queue_index);
1220 ++tx_ring->tx_stats.restart_queue;
1221 }
1222 }
1223
1224 return !!budget;
1225 }
1226
1227 #ifdef CONFIG_IXGBE_DCA
1228 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
1229 struct ixgbe_ring *tx_ring,
1230 int cpu)
1231 {
1232 struct ixgbe_hw *hw = &adapter->hw;
1233 u32 txctrl = dca3_get_tag(tx_ring->dev, cpu);
1234 u16 reg_offset;
1235
1236 switch (hw->mac.type) {
1237 case ixgbe_mac_82598EB:
1238 reg_offset = IXGBE_DCA_TXCTRL(tx_ring->reg_idx);
1239 break;
1240 case ixgbe_mac_82599EB:
1241 case ixgbe_mac_X540:
1242 reg_offset = IXGBE_DCA_TXCTRL_82599(tx_ring->reg_idx);
1243 txctrl <<= IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599;
1244 break;
1245 default:
1246 /* for unknown hardware do not write register */
1247 return;
1248 }
1249
1250 /*
1251 * We can enable relaxed ordering for reads, but not writes when
1252 * DCA is enabled. This is due to a known issue in some chipsets
1253 * which will cause the DCA tag to be cleared.
1254 */
1255 txctrl |= IXGBE_DCA_TXCTRL_DESC_RRO_EN |
1256 IXGBE_DCA_TXCTRL_DATA_RRO_EN |
1257 IXGBE_DCA_TXCTRL_DESC_DCA_EN;
1258
1259 IXGBE_WRITE_REG(hw, reg_offset, txctrl);
1260 }
1261
1262 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
1263 struct ixgbe_ring *rx_ring,
1264 int cpu)
1265 {
1266 struct ixgbe_hw *hw = &adapter->hw;
1267 u32 rxctrl = dca3_get_tag(rx_ring->dev, cpu);
1268 u8 reg_idx = rx_ring->reg_idx;
1269
1270
1271 switch (hw->mac.type) {
1272 case ixgbe_mac_82599EB:
1273 case ixgbe_mac_X540:
1274 rxctrl <<= IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599;
1275 break;
1276 default:
1277 break;
1278 }
1279
1280 /*
1281 * We can enable relaxed ordering for reads, but not writes when
1282 * DCA is enabled. This is due to a known issue in some chipsets
1283 * which will cause the DCA tag to be cleared.
1284 */
1285 rxctrl |= IXGBE_DCA_RXCTRL_DESC_RRO_EN |
1286 IXGBE_DCA_RXCTRL_DESC_DCA_EN;
1287
1288 IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl);
1289 }
1290
1291 static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
1292 {
1293 struct ixgbe_adapter *adapter = q_vector->adapter;
1294 struct ixgbe_ring *ring;
1295 int cpu = get_cpu();
1296
1297 if (q_vector->cpu == cpu)
1298 goto out_no_update;
1299
1300 ixgbe_for_each_ring(ring, q_vector->tx)
1301 ixgbe_update_tx_dca(adapter, ring, cpu);
1302
1303 ixgbe_for_each_ring(ring, q_vector->rx)
1304 ixgbe_update_rx_dca(adapter, ring, cpu);
1305
1306 q_vector->cpu = cpu;
1307 out_no_update:
1308 put_cpu();
1309 }
1310
1311 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
1312 {
1313 int i;
1314
1315 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
1316 return;
1317
1318 /* always use CB2 mode, difference is masked in the CB driver */
1319 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
1320
1321 for (i = 0; i < adapter->num_q_vectors; i++) {
1322 adapter->q_vector[i]->cpu = -1;
1323 ixgbe_update_dca(adapter->q_vector[i]);
1324 }
1325 }
1326
1327 static int __ixgbe_notify_dca(struct device *dev, void *data)
1328 {
1329 struct ixgbe_adapter *adapter = dev_get_drvdata(dev);
1330 unsigned long event = *(unsigned long *)data;
1331
1332 if (!(adapter->flags & IXGBE_FLAG_DCA_CAPABLE))
1333 return 0;
1334
1335 switch (event) {
1336 case DCA_PROVIDER_ADD:
1337 /* if we're already enabled, don't do it again */
1338 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1339 break;
1340 if (dca_add_requester(dev) == 0) {
1341 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
1342 ixgbe_setup_dca(adapter);
1343 break;
1344 }
1345 /* Fall Through since DCA is disabled. */
1346 case DCA_PROVIDER_REMOVE:
1347 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
1348 dca_remove_requester(dev);
1349 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
1350 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
1351 }
1352 break;
1353 }
1354
1355 return 0;
1356 }
1357
1358 #endif /* CONFIG_IXGBE_DCA */
1359 static inline void ixgbe_rx_hash(struct ixgbe_ring *ring,
1360 union ixgbe_adv_rx_desc *rx_desc,
1361 struct sk_buff *skb)
1362 {
1363 if (ring->netdev->features & NETIF_F_RXHASH)
1364 skb_set_hash(skb,
1365 le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),
1366 PKT_HASH_TYPE_L3);
1367 }
1368
1369 #ifdef IXGBE_FCOE
1370 /**
1371 * ixgbe_rx_is_fcoe - check the rx desc for incoming pkt type
1372 * @ring: structure containing ring specific data
1373 * @rx_desc: advanced rx descriptor
1374 *
1375 * Returns : true if it is FCoE pkt
1376 */
1377 static inline bool ixgbe_rx_is_fcoe(struct ixgbe_ring *ring,
1378 union ixgbe_adv_rx_desc *rx_desc)
1379 {
1380 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1381
1382 return test_bit(__IXGBE_RX_FCOE, &ring->state) &&
1383 ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_ETQF_MASK)) ==
1384 (cpu_to_le16(IXGBE_ETQF_FILTER_FCOE <<
1385 IXGBE_RXDADV_PKTTYPE_ETQF_SHIFT)));
1386 }
1387
1388 #endif /* IXGBE_FCOE */
1389 /**
1390 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
1391 * @ring: structure containing ring specific data
1392 * @rx_desc: current Rx descriptor being processed
1393 * @skb: skb currently being received and modified
1394 **/
1395 static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
1396 union ixgbe_adv_rx_desc *rx_desc,
1397 struct sk_buff *skb)
1398 {
1399 skb_checksum_none_assert(skb);
1400
1401 /* Rx csum disabled */
1402 if (!(ring->netdev->features & NETIF_F_RXCSUM))
1403 return;
1404
1405 /* if IP and error */
1406 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
1407 ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
1408 ring->rx_stats.csum_err++;
1409 return;
1410 }
1411
1412 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
1413 return;
1414
1415 if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
1416 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1417
1418 /*
1419 * 82599 errata, UDP frames with a 0 checksum can be marked as
1420 * checksum errors.
1421 */
1422 if ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_UDP)) &&
1423 test_bit(__IXGBE_RX_CSUM_UDP_ZERO_ERR, &ring->state))
1424 return;
1425
1426 ring->rx_stats.csum_err++;
1427 return;
1428 }
1429
1430 /* It must be a TCP or UDP packet with a valid checksum */
1431 skb->ip_summed = CHECKSUM_UNNECESSARY;
1432 }
1433
1434 static bool ixgbe_alloc_mapped_page(struct ixgbe_ring *rx_ring,
1435 struct ixgbe_rx_buffer *bi)
1436 {
1437 struct page *page = bi->page;
1438 dma_addr_t dma;
1439
1440 /* since we are recycling buffers we should seldom need to alloc */
1441 if (likely(page))
1442 return true;
1443
1444 /* alloc new page for storage */
1445 page = dev_alloc_pages(ixgbe_rx_pg_order(rx_ring));
1446 if (unlikely(!page)) {
1447 rx_ring->rx_stats.alloc_rx_page_failed++;
1448 return false;
1449 }
1450
1451 /* map page for use */
1452 dma = dma_map_page(rx_ring->dev, page, 0,
1453 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
1454
1455 /*
1456 * if mapping failed free memory back to system since
1457 * there isn't much point in holding memory we can't use
1458 */
1459 if (dma_mapping_error(rx_ring->dev, dma)) {
1460 __free_pages(page, ixgbe_rx_pg_order(rx_ring));
1461
1462 rx_ring->rx_stats.alloc_rx_page_failed++;
1463 return false;
1464 }
1465
1466 bi->dma = dma;
1467 bi->page = page;
1468 bi->page_offset = 0;
1469
1470 return true;
1471 }
1472
1473 /**
1474 * ixgbe_alloc_rx_buffers - Replace used receive buffers
1475 * @rx_ring: ring to place buffers on
1476 * @cleaned_count: number of buffers to replace
1477 **/
1478 void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count)
1479 {
1480 union ixgbe_adv_rx_desc *rx_desc;
1481 struct ixgbe_rx_buffer *bi;
1482 u16 i = rx_ring->next_to_use;
1483
1484 /* nothing to do */
1485 if (!cleaned_count)
1486 return;
1487
1488 rx_desc = IXGBE_RX_DESC(rx_ring, i);
1489 bi = &rx_ring->rx_buffer_info[i];
1490 i -= rx_ring->count;
1491
1492 do {
1493 if (!ixgbe_alloc_mapped_page(rx_ring, bi))
1494 break;
1495
1496 /*
1497 * Refresh the desc even if buffer_addrs didn't change
1498 * because each write-back erases this info.
1499 */
1500 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
1501
1502 rx_desc++;
1503 bi++;
1504 i++;
1505 if (unlikely(!i)) {
1506 rx_desc = IXGBE_RX_DESC(rx_ring, 0);
1507 bi = rx_ring->rx_buffer_info;
1508 i -= rx_ring->count;
1509 }
1510
1511 /* clear the status bits for the next_to_use descriptor */
1512 rx_desc->wb.upper.status_error = 0;
1513
1514 cleaned_count--;
1515 } while (cleaned_count);
1516
1517 i += rx_ring->count;
1518
1519 if (rx_ring->next_to_use != i) {
1520 rx_ring->next_to_use = i;
1521
1522 /* update next to alloc since we have filled the ring */
1523 rx_ring->next_to_alloc = i;
1524
1525 /* Force memory writes to complete before letting h/w
1526 * know there are new descriptors to fetch. (Only
1527 * applicable for weak-ordered memory model archs,
1528 * such as IA-64).
1529 */
1530 wmb();
1531 writel(i, rx_ring->tail);
1532 }
1533 }
1534
1535 static void ixgbe_set_rsc_gso_size(struct ixgbe_ring *ring,
1536 struct sk_buff *skb)
1537 {
1538 u16 hdr_len = skb_headlen(skb);
1539
1540 /* set gso_size to avoid messing up TCP MSS */
1541 skb_shinfo(skb)->gso_size = DIV_ROUND_UP((skb->len - hdr_len),
1542 IXGBE_CB(skb)->append_cnt);
1543 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1544 }
1545
1546 static void ixgbe_update_rsc_stats(struct ixgbe_ring *rx_ring,
1547 struct sk_buff *skb)
1548 {
1549 /* if append_cnt is 0 then frame is not RSC */
1550 if (!IXGBE_CB(skb)->append_cnt)
1551 return;
1552
1553 rx_ring->rx_stats.rsc_count += IXGBE_CB(skb)->append_cnt;
1554 rx_ring->rx_stats.rsc_flush++;
1555
1556 ixgbe_set_rsc_gso_size(rx_ring, skb);
1557
1558 /* gso_size is computed using append_cnt so always clear it last */
1559 IXGBE_CB(skb)->append_cnt = 0;
1560 }
1561
1562 /**
1563 * ixgbe_process_skb_fields - Populate skb header fields from Rx descriptor
1564 * @rx_ring: rx descriptor ring packet is being transacted on
1565 * @rx_desc: pointer to the EOP Rx descriptor
1566 * @skb: pointer to current skb being populated
1567 *
1568 * This function checks the ring, descriptor, and packet information in
1569 * order to populate the hash, checksum, VLAN, timestamp, protocol, and
1570 * other fields within the skb.
1571 **/
1572 static void ixgbe_process_skb_fields(struct ixgbe_ring *rx_ring,
1573 union ixgbe_adv_rx_desc *rx_desc,
1574 struct sk_buff *skb)
1575 {
1576 struct net_device *dev = rx_ring->netdev;
1577
1578 ixgbe_update_rsc_stats(rx_ring, skb);
1579
1580 ixgbe_rx_hash(rx_ring, rx_desc, skb);
1581
1582 ixgbe_rx_checksum(rx_ring, rx_desc, skb);
1583
1584 if (unlikely(ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_STAT_TS)))
1585 ixgbe_ptp_rx_hwtstamp(rx_ring->q_vector->adapter, skb);
1586
1587 if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
1588 ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
1589 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
1590 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1591 }
1592
1593 skb_record_rx_queue(skb, rx_ring->queue_index);
1594
1595 skb->protocol = eth_type_trans(skb, dev);
1596 }
1597
1598 static void ixgbe_rx_skb(struct ixgbe_q_vector *q_vector,
1599 struct sk_buff *skb)
1600 {
1601 struct ixgbe_adapter *adapter = q_vector->adapter;
1602
1603 if (ixgbe_qv_busy_polling(q_vector))
1604 netif_receive_skb(skb);
1605 else if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
1606 napi_gro_receive(&q_vector->napi, skb);
1607 else
1608 netif_rx(skb);
1609 }
1610
1611 /**
1612 * ixgbe_is_non_eop - process handling of non-EOP buffers
1613 * @rx_ring: Rx ring being processed
1614 * @rx_desc: Rx descriptor for current buffer
1615 * @skb: Current socket buffer containing buffer in progress
1616 *
1617 * This function updates next to clean. If the buffer is an EOP buffer
1618 * this function exits returning false, otherwise it will place the
1619 * sk_buff in the next buffer to be chained and return true indicating
1620 * that this is in fact a non-EOP buffer.
1621 **/
1622 static bool ixgbe_is_non_eop(struct ixgbe_ring *rx_ring,
1623 union ixgbe_adv_rx_desc *rx_desc,
1624 struct sk_buff *skb)
1625 {
1626 u32 ntc = rx_ring->next_to_clean + 1;
1627
1628 /* fetch, update, and store next to clean */
1629 ntc = (ntc < rx_ring->count) ? ntc : 0;
1630 rx_ring->next_to_clean = ntc;
1631
1632 prefetch(IXGBE_RX_DESC(rx_ring, ntc));
1633
1634 /* update RSC append count if present */
1635 if (ring_is_rsc_enabled(rx_ring)) {
1636 __le32 rsc_enabled = rx_desc->wb.lower.lo_dword.data &
1637 cpu_to_le32(IXGBE_RXDADV_RSCCNT_MASK);
1638
1639 if (unlikely(rsc_enabled)) {
1640 u32 rsc_cnt = le32_to_cpu(rsc_enabled);
1641
1642 rsc_cnt >>= IXGBE_RXDADV_RSCCNT_SHIFT;
1643 IXGBE_CB(skb)->append_cnt += rsc_cnt - 1;
1644
1645 /* update ntc based on RSC value */
1646 ntc = le32_to_cpu(rx_desc->wb.upper.status_error);
1647 ntc &= IXGBE_RXDADV_NEXTP_MASK;
1648 ntc >>= IXGBE_RXDADV_NEXTP_SHIFT;
1649 }
1650 }
1651
1652 /* if we are the last buffer then there is nothing else to do */
1653 if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
1654 return false;
1655
1656 /* place skb in next buffer to be received */
1657 rx_ring->rx_buffer_info[ntc].skb = skb;
1658 rx_ring->rx_stats.non_eop_descs++;
1659
1660 return true;
1661 }
1662
1663 /**
1664 * ixgbe_pull_tail - ixgbe specific version of skb_pull_tail
1665 * @rx_ring: rx descriptor ring packet is being transacted on
1666 * @skb: pointer to current skb being adjusted
1667 *
1668 * This function is an ixgbe specific version of __pskb_pull_tail. The
1669 * main difference between this version and the original function is that
1670 * this function can make several assumptions about the state of things
1671 * that allow for significant optimizations versus the standard function.
1672 * As a result we can do things like drop a frag and maintain an accurate
1673 * truesize for the skb.
1674 */
1675 static void ixgbe_pull_tail(struct ixgbe_ring *rx_ring,
1676 struct sk_buff *skb)
1677 {
1678 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
1679 unsigned char *va;
1680 unsigned int pull_len;
1681
1682 /*
1683 * it is valid to use page_address instead of kmap since we are
1684 * working with pages allocated out of the lomem pool per
1685 * alloc_page(GFP_ATOMIC)
1686 */
1687 va = skb_frag_address(frag);
1688
1689 /*
1690 * we need the header to contain the greater of either ETH_HLEN or
1691 * 60 bytes if the skb->len is less than 60 for skb_pad.
1692 */
1693 pull_len = eth_get_headlen(va, IXGBE_RX_HDR_SIZE);
1694
1695 /* align pull length to size of long to optimize memcpy performance */
1696 skb_copy_to_linear_data(skb, va, ALIGN(pull_len, sizeof(long)));
1697
1698 /* update all of the pointers */
1699 skb_frag_size_sub(frag, pull_len);
1700 frag->page_offset += pull_len;
1701 skb->data_len -= pull_len;
1702 skb->tail += pull_len;
1703 }
1704
1705 /**
1706 * ixgbe_dma_sync_frag - perform DMA sync for first frag of SKB
1707 * @rx_ring: rx descriptor ring packet is being transacted on
1708 * @skb: pointer to current skb being updated
1709 *
1710 * This function provides a basic DMA sync up for the first fragment of an
1711 * skb. The reason for doing this is that the first fragment cannot be
1712 * unmapped until we have reached the end of packet descriptor for a buffer
1713 * chain.
1714 */
1715 static void ixgbe_dma_sync_frag(struct ixgbe_ring *rx_ring,
1716 struct sk_buff *skb)
1717 {
1718 /* if the page was released unmap it, else just sync our portion */
1719 if (unlikely(IXGBE_CB(skb)->page_released)) {
1720 dma_unmap_page(rx_ring->dev, IXGBE_CB(skb)->dma,
1721 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
1722 IXGBE_CB(skb)->page_released = false;
1723 } else {
1724 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
1725
1726 dma_sync_single_range_for_cpu(rx_ring->dev,
1727 IXGBE_CB(skb)->dma,
1728 frag->page_offset,
1729 ixgbe_rx_bufsz(rx_ring),
1730 DMA_FROM_DEVICE);
1731 }
1732 IXGBE_CB(skb)->dma = 0;
1733 }
1734
1735 /**
1736 * ixgbe_cleanup_headers - Correct corrupted or empty headers
1737 * @rx_ring: rx descriptor ring packet is being transacted on
1738 * @rx_desc: pointer to the EOP Rx descriptor
1739 * @skb: pointer to current skb being fixed
1740 *
1741 * Check for corrupted packet headers caused by senders on the local L2
1742 * embedded NIC switch not setting up their Tx Descriptors right. These
1743 * should be very rare.
1744 *
1745 * Also address the case where we are pulling data in on pages only
1746 * and as such no data is present in the skb header.
1747 *
1748 * In addition if skb is not at least 60 bytes we need to pad it so that
1749 * it is large enough to qualify as a valid Ethernet frame.
1750 *
1751 * Returns true if an error was encountered and skb was freed.
1752 **/
1753 static bool ixgbe_cleanup_headers(struct ixgbe_ring *rx_ring,
1754 union ixgbe_adv_rx_desc *rx_desc,
1755 struct sk_buff *skb)
1756 {
1757 struct net_device *netdev = rx_ring->netdev;
1758
1759 /* verify that the packet does not have any known errors */
1760 if (unlikely(ixgbe_test_staterr(rx_desc,
1761 IXGBE_RXDADV_ERR_FRAME_ERR_MASK) &&
1762 !(netdev->features & NETIF_F_RXALL))) {
1763 dev_kfree_skb_any(skb);
1764 return true;
1765 }
1766
1767 /* place header in linear portion of buffer */
1768 if (skb_is_nonlinear(skb))
1769 ixgbe_pull_tail(rx_ring, skb);
1770
1771 #ifdef IXGBE_FCOE
1772 /* do not attempt to pad FCoE Frames as this will disrupt DDP */
1773 if (ixgbe_rx_is_fcoe(rx_ring, rx_desc))
1774 return false;
1775
1776 #endif
1777 /* if eth_skb_pad returns an error the skb was freed */
1778 if (eth_skb_pad(skb))
1779 return true;
1780
1781 return false;
1782 }
1783
1784 /**
1785 * ixgbe_reuse_rx_page - page flip buffer and store it back on the ring
1786 * @rx_ring: rx descriptor ring to store buffers on
1787 * @old_buff: donor buffer to have page reused
1788 *
1789 * Synchronizes page for reuse by the adapter
1790 **/
1791 static void ixgbe_reuse_rx_page(struct ixgbe_ring *rx_ring,
1792 struct ixgbe_rx_buffer *old_buff)
1793 {
1794 struct ixgbe_rx_buffer *new_buff;
1795 u16 nta = rx_ring->next_to_alloc;
1796
1797 new_buff = &rx_ring->rx_buffer_info[nta];
1798
1799 /* update, and store next to alloc */
1800 nta++;
1801 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
1802
1803 /* transfer page from old buffer to new buffer */
1804 *new_buff = *old_buff;
1805
1806 /* sync the buffer for use by the device */
1807 dma_sync_single_range_for_device(rx_ring->dev, new_buff->dma,
1808 new_buff->page_offset,
1809 ixgbe_rx_bufsz(rx_ring),
1810 DMA_FROM_DEVICE);
1811 }
1812
1813 static inline bool ixgbe_page_is_reserved(struct page *page)
1814 {
1815 return (page_to_nid(page) != numa_mem_id()) || page->pfmemalloc;
1816 }
1817
1818 /**
1819 * ixgbe_add_rx_frag - Add contents of Rx buffer to sk_buff
1820 * @rx_ring: rx descriptor ring to transact packets on
1821 * @rx_buffer: buffer containing page to add
1822 * @rx_desc: descriptor containing length of buffer written by hardware
1823 * @skb: sk_buff to place the data into
1824 *
1825 * This function will add the data contained in rx_buffer->page to the skb.
1826 * This is done either through a direct copy if the data in the buffer is
1827 * less than the skb header size, otherwise it will just attach the page as
1828 * a frag to the skb.
1829 *
1830 * The function will then update the page offset if necessary and return
1831 * true if the buffer can be reused by the adapter.
1832 **/
1833 static bool ixgbe_add_rx_frag(struct ixgbe_ring *rx_ring,
1834 struct ixgbe_rx_buffer *rx_buffer,
1835 union ixgbe_adv_rx_desc *rx_desc,
1836 struct sk_buff *skb)
1837 {
1838 struct page *page = rx_buffer->page;
1839 unsigned int size = le16_to_cpu(rx_desc->wb.upper.length);
1840 #if (PAGE_SIZE < 8192)
1841 unsigned int truesize = ixgbe_rx_bufsz(rx_ring);
1842 #else
1843 unsigned int truesize = ALIGN(size, L1_CACHE_BYTES);
1844 unsigned int last_offset = ixgbe_rx_pg_size(rx_ring) -
1845 ixgbe_rx_bufsz(rx_ring);
1846 #endif
1847
1848 if ((size <= IXGBE_RX_HDR_SIZE) && !skb_is_nonlinear(skb)) {
1849 unsigned char *va = page_address(page) + rx_buffer->page_offset;
1850
1851 memcpy(__skb_put(skb, size), va, ALIGN(size, sizeof(long)));
1852
1853 /* page is not reserved, we can reuse buffer as-is */
1854 if (likely(!ixgbe_page_is_reserved(page)))
1855 return true;
1856
1857 /* this page cannot be reused so discard it */
1858 __free_pages(page, ixgbe_rx_pg_order(rx_ring));
1859 return false;
1860 }
1861
1862 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
1863 rx_buffer->page_offset, size, truesize);
1864
1865 /* avoid re-using remote pages */
1866 if (unlikely(ixgbe_page_is_reserved(page)))
1867 return false;
1868
1869 #if (PAGE_SIZE < 8192)
1870 /* if we are only owner of page we can reuse it */
1871 if (unlikely(page_count(page) != 1))
1872 return false;
1873
1874 /* flip page offset to other buffer */
1875 rx_buffer->page_offset ^= truesize;
1876 #else
1877 /* move offset up to the next cache line */
1878 rx_buffer->page_offset += truesize;
1879
1880 if (rx_buffer->page_offset > last_offset)
1881 return false;
1882 #endif
1883
1884 /* Even if we own the page, we are not allowed to use atomic_set()
1885 * This would break get_page_unless_zero() users.
1886 */
1887 atomic_inc(&page->_count);
1888
1889 return true;
1890 }
1891
1892 static struct sk_buff *ixgbe_fetch_rx_buffer(struct ixgbe_ring *rx_ring,
1893 union ixgbe_adv_rx_desc *rx_desc)
1894 {
1895 struct ixgbe_rx_buffer *rx_buffer;
1896 struct sk_buff *skb;
1897 struct page *page;
1898
1899 rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
1900 page = rx_buffer->page;
1901 prefetchw(page);
1902
1903 skb = rx_buffer->skb;
1904
1905 if (likely(!skb)) {
1906 void *page_addr = page_address(page) +
1907 rx_buffer->page_offset;
1908
1909 /* prefetch first cache line of first page */
1910 prefetch(page_addr);
1911 #if L1_CACHE_BYTES < 128
1912 prefetch(page_addr + L1_CACHE_BYTES);
1913 #endif
1914
1915 /* allocate a skb to store the frags */
1916 skb = napi_alloc_skb(&rx_ring->q_vector->napi,
1917 IXGBE_RX_HDR_SIZE);
1918 if (unlikely(!skb)) {
1919 rx_ring->rx_stats.alloc_rx_buff_failed++;
1920 return NULL;
1921 }
1922
1923 /*
1924 * we will be copying header into skb->data in
1925 * pskb_may_pull so it is in our interest to prefetch
1926 * it now to avoid a possible cache miss
1927 */
1928 prefetchw(skb->data);
1929
1930 /*
1931 * Delay unmapping of the first packet. It carries the
1932 * header information, HW may still access the header
1933 * after the writeback. Only unmap it when EOP is
1934 * reached
1935 */
1936 if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
1937 goto dma_sync;
1938
1939 IXGBE_CB(skb)->dma = rx_buffer->dma;
1940 } else {
1941 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP))
1942 ixgbe_dma_sync_frag(rx_ring, skb);
1943
1944 dma_sync:
1945 /* we are reusing so sync this buffer for CPU use */
1946 dma_sync_single_range_for_cpu(rx_ring->dev,
1947 rx_buffer->dma,
1948 rx_buffer->page_offset,
1949 ixgbe_rx_bufsz(rx_ring),
1950 DMA_FROM_DEVICE);
1951
1952 rx_buffer->skb = NULL;
1953 }
1954
1955 /* pull page into skb */
1956 if (ixgbe_add_rx_frag(rx_ring, rx_buffer, rx_desc, skb)) {
1957 /* hand second half of page back to the ring */
1958 ixgbe_reuse_rx_page(rx_ring, rx_buffer);
1959 } else if (IXGBE_CB(skb)->dma == rx_buffer->dma) {
1960 /* the page has been released from the ring */
1961 IXGBE_CB(skb)->page_released = true;
1962 } else {
1963 /* we are not reusing the buffer so unmap it */
1964 dma_unmap_page(rx_ring->dev, rx_buffer->dma,
1965 ixgbe_rx_pg_size(rx_ring),
1966 DMA_FROM_DEVICE);
1967 }
1968
1969 /* clear contents of buffer_info */
1970 rx_buffer->page = NULL;
1971
1972 return skb;
1973 }
1974
1975 /**
1976 * ixgbe_clean_rx_irq - Clean completed descriptors from Rx ring - bounce buf
1977 * @q_vector: structure containing interrupt and ring information
1978 * @rx_ring: rx descriptor ring to transact packets on
1979 * @budget: Total limit on number of packets to process
1980 *
1981 * This function provides a "bounce buffer" approach to Rx interrupt
1982 * processing. The advantage to this is that on systems that have
1983 * expensive overhead for IOMMU access this provides a means of avoiding
1984 * it by maintaining the mapping of the page to the syste.
1985 *
1986 * Returns amount of work completed
1987 **/
1988 static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
1989 struct ixgbe_ring *rx_ring,
1990 const int budget)
1991 {
1992 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1993 #ifdef IXGBE_FCOE
1994 struct ixgbe_adapter *adapter = q_vector->adapter;
1995 int ddp_bytes;
1996 unsigned int mss = 0;
1997 #endif /* IXGBE_FCOE */
1998 u16 cleaned_count = ixgbe_desc_unused(rx_ring);
1999
2000 while (likely(total_rx_packets < budget)) {
2001 union ixgbe_adv_rx_desc *rx_desc;
2002 struct sk_buff *skb;
2003
2004 /* return some buffers to hardware, one at a time is too slow */
2005 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
2006 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
2007 cleaned_count = 0;
2008 }
2009
2010 rx_desc = IXGBE_RX_DESC(rx_ring, rx_ring->next_to_clean);
2011
2012 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_DD))
2013 break;
2014
2015 /*
2016 * This memory barrier is needed to keep us from reading
2017 * any other fields out of the rx_desc until we know the
2018 * RXD_STAT_DD bit is set
2019 */
2020 rmb();
2021
2022 /* retrieve a buffer from the ring */
2023 skb = ixgbe_fetch_rx_buffer(rx_ring, rx_desc);
2024
2025 /* exit if we failed to retrieve a buffer */
2026 if (!skb)
2027 break;
2028
2029 cleaned_count++;
2030
2031 /* place incomplete frames back on ring for completion */
2032 if (ixgbe_is_non_eop(rx_ring, rx_desc, skb))
2033 continue;
2034
2035 /* verify the packet layout is correct */
2036 if (ixgbe_cleanup_headers(rx_ring, rx_desc, skb))
2037 continue;
2038
2039 /* probably a little skewed due to removing CRC */
2040 total_rx_bytes += skb->len;
2041
2042 /* populate checksum, timestamp, VLAN, and protocol */
2043 ixgbe_process_skb_fields(rx_ring, rx_desc, skb);
2044
2045 #ifdef IXGBE_FCOE
2046 /* if ddp, not passing to ULD unless for FCP_RSP or error */
2047 if (ixgbe_rx_is_fcoe(rx_ring, rx_desc)) {
2048 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
2049 /* include DDPed FCoE data */
2050 if (ddp_bytes > 0) {
2051 if (!mss) {
2052 mss = rx_ring->netdev->mtu -
2053 sizeof(struct fcoe_hdr) -
2054 sizeof(struct fc_frame_header) -
2055 sizeof(struct fcoe_crc_eof);
2056 if (mss > 512)
2057 mss &= ~511;
2058 }
2059 total_rx_bytes += ddp_bytes;
2060 total_rx_packets += DIV_ROUND_UP(ddp_bytes,
2061 mss);
2062 }
2063 if (!ddp_bytes) {
2064 dev_kfree_skb_any(skb);
2065 continue;
2066 }
2067 }
2068
2069 #endif /* IXGBE_FCOE */
2070 skb_mark_napi_id(skb, &q_vector->napi);
2071 ixgbe_rx_skb(q_vector, skb);
2072
2073 /* update budget accounting */
2074 total_rx_packets++;
2075 }
2076
2077 u64_stats_update_begin(&rx_ring->syncp);
2078 rx_ring->stats.packets += total_rx_packets;
2079 rx_ring->stats.bytes += total_rx_bytes;
2080 u64_stats_update_end(&rx_ring->syncp);
2081 q_vector->rx.total_packets += total_rx_packets;
2082 q_vector->rx.total_bytes += total_rx_bytes;
2083
2084 return total_rx_packets;
2085 }
2086
2087 #ifdef CONFIG_NET_RX_BUSY_POLL
2088 /* must be called with local_bh_disable()d */
2089 static int ixgbe_low_latency_recv(struct napi_struct *napi)
2090 {
2091 struct ixgbe_q_vector *q_vector =
2092 container_of(napi, struct ixgbe_q_vector, napi);
2093 struct ixgbe_adapter *adapter = q_vector->adapter;
2094 struct ixgbe_ring *ring;
2095 int found = 0;
2096
2097 if (test_bit(__IXGBE_DOWN, &adapter->state))
2098 return LL_FLUSH_FAILED;
2099
2100 if (!ixgbe_qv_lock_poll(q_vector))
2101 return LL_FLUSH_BUSY;
2102
2103 ixgbe_for_each_ring(ring, q_vector->rx) {
2104 found = ixgbe_clean_rx_irq(q_vector, ring, 4);
2105 #ifdef BP_EXTENDED_STATS
2106 if (found)
2107 ring->stats.cleaned += found;
2108 else
2109 ring->stats.misses++;
2110 #endif
2111 if (found)
2112 break;
2113 }
2114
2115 ixgbe_qv_unlock_poll(q_vector);
2116
2117 return found;
2118 }
2119 #endif /* CONFIG_NET_RX_BUSY_POLL */
2120
2121 /**
2122 * ixgbe_configure_msix - Configure MSI-X hardware
2123 * @adapter: board private structure
2124 *
2125 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
2126 * interrupts.
2127 **/
2128 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
2129 {
2130 struct ixgbe_q_vector *q_vector;
2131 int v_idx;
2132 u32 mask;
2133
2134 /* Populate MSIX to EITR Select */
2135 if (adapter->num_vfs > 32) {
2136 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
2137 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
2138 }
2139
2140 /*
2141 * Populate the IVAR table and set the ITR values to the
2142 * corresponding register.
2143 */
2144 for (v_idx = 0; v_idx < adapter->num_q_vectors; v_idx++) {
2145 struct ixgbe_ring *ring;
2146 q_vector = adapter->q_vector[v_idx];
2147
2148 ixgbe_for_each_ring(ring, q_vector->rx)
2149 ixgbe_set_ivar(adapter, 0, ring->reg_idx, v_idx);
2150
2151 ixgbe_for_each_ring(ring, q_vector->tx)
2152 ixgbe_set_ivar(adapter, 1, ring->reg_idx, v_idx);
2153
2154 ixgbe_write_eitr(q_vector);
2155 }
2156
2157 switch (adapter->hw.mac.type) {
2158 case ixgbe_mac_82598EB:
2159 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
2160 v_idx);
2161 break;
2162 case ixgbe_mac_82599EB:
2163 case ixgbe_mac_X540:
2164 case ixgbe_mac_X550:
2165 case ixgbe_mac_X550EM_x:
2166 ixgbe_set_ivar(adapter, -1, 1, v_idx);
2167 break;
2168 default:
2169 break;
2170 }
2171 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
2172
2173 /* set up to autoclear timer, and the vectors */
2174 mask = IXGBE_EIMS_ENABLE_MASK;
2175 mask &= ~(IXGBE_EIMS_OTHER |
2176 IXGBE_EIMS_MAILBOX |
2177 IXGBE_EIMS_LSC);
2178
2179 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
2180 }
2181
2182 enum latency_range {
2183 lowest_latency = 0,
2184 low_latency = 1,
2185 bulk_latency = 2,
2186 latency_invalid = 255
2187 };
2188
2189 /**
2190 * ixgbe_update_itr - update the dynamic ITR value based on statistics
2191 * @q_vector: structure containing interrupt and ring information
2192 * @ring_container: structure containing ring performance data
2193 *
2194 * Stores a new ITR value based on packets and byte
2195 * counts during the last interrupt. The advantage of per interrupt
2196 * computation is faster updates and more accurate ITR for the current
2197 * traffic pattern. Constants in this function were computed
2198 * based on theoretical maximum wire speed and thresholds were set based
2199 * on testing data as well as attempting to minimize response time
2200 * while increasing bulk throughput.
2201 * this functionality is controlled by the InterruptThrottleRate module
2202 * parameter (see ixgbe_param.c)
2203 **/
2204 static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
2205 struct ixgbe_ring_container *ring_container)
2206 {
2207 int bytes = ring_container->total_bytes;
2208 int packets = ring_container->total_packets;
2209 u32 timepassed_us;
2210 u64 bytes_perint;
2211 u8 itr_setting = ring_container->itr;
2212
2213 if (packets == 0)
2214 return;
2215
2216 /* simple throttlerate management
2217 * 0-10MB/s lowest (100000 ints/s)
2218 * 10-20MB/s low (20000 ints/s)
2219 * 20-1249MB/s bulk (8000 ints/s)
2220 */
2221 /* what was last interrupt timeslice? */
2222 timepassed_us = q_vector->itr >> 2;
2223 if (timepassed_us == 0)
2224 return;
2225
2226 bytes_perint = bytes / timepassed_us; /* bytes/usec */
2227
2228 switch (itr_setting) {
2229 case lowest_latency:
2230 if (bytes_perint > 10)
2231 itr_setting = low_latency;
2232 break;
2233 case low_latency:
2234 if (bytes_perint > 20)
2235 itr_setting = bulk_latency;
2236 else if (bytes_perint <= 10)
2237 itr_setting = lowest_latency;
2238 break;
2239 case bulk_latency:
2240 if (bytes_perint <= 20)
2241 itr_setting = low_latency;
2242 break;
2243 }
2244
2245 /* clear work counters since we have the values we need */
2246 ring_container->total_bytes = 0;
2247 ring_container->total_packets = 0;
2248
2249 /* write updated itr to ring container */
2250 ring_container->itr = itr_setting;
2251 }
2252
2253 /**
2254 * ixgbe_write_eitr - write EITR register in hardware specific way
2255 * @q_vector: structure containing interrupt and ring information
2256 *
2257 * This function is made to be called by ethtool and by the driver
2258 * when it needs to update EITR registers at runtime. Hardware
2259 * specific quirks/differences are taken care of here.
2260 */
2261 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
2262 {
2263 struct ixgbe_adapter *adapter = q_vector->adapter;
2264 struct ixgbe_hw *hw = &adapter->hw;
2265 int v_idx = q_vector->v_idx;
2266 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
2267
2268 switch (adapter->hw.mac.type) {
2269 case ixgbe_mac_82598EB:
2270 /* must write high and low 16 bits to reset counter */
2271 itr_reg |= (itr_reg << 16);
2272 break;
2273 case ixgbe_mac_82599EB:
2274 case ixgbe_mac_X540:
2275 case ixgbe_mac_X550:
2276 case ixgbe_mac_X550EM_x:
2277 /*
2278 * set the WDIS bit to not clear the timer bits and cause an
2279 * immediate assertion of the interrupt
2280 */
2281 itr_reg |= IXGBE_EITR_CNT_WDIS;
2282 break;
2283 default:
2284 break;
2285 }
2286 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
2287 }
2288
2289 static void ixgbe_set_itr(struct ixgbe_q_vector *q_vector)
2290 {
2291 u32 new_itr = q_vector->itr;
2292 u8 current_itr;
2293
2294 ixgbe_update_itr(q_vector, &q_vector->tx);
2295 ixgbe_update_itr(q_vector, &q_vector->rx);
2296
2297 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
2298
2299 switch (current_itr) {
2300 /* counts and packets in update_itr are dependent on these numbers */
2301 case lowest_latency:
2302 new_itr = IXGBE_100K_ITR;
2303 break;
2304 case low_latency:
2305 new_itr = IXGBE_20K_ITR;
2306 break;
2307 case bulk_latency:
2308 new_itr = IXGBE_8K_ITR;
2309 break;
2310 default:
2311 break;
2312 }
2313
2314 if (new_itr != q_vector->itr) {
2315 /* do an exponential smoothing */
2316 new_itr = (10 * new_itr * q_vector->itr) /
2317 ((9 * new_itr) + q_vector->itr);
2318
2319 /* save the algorithm value here */
2320 q_vector->itr = new_itr;
2321
2322 ixgbe_write_eitr(q_vector);
2323 }
2324 }
2325
2326 /**
2327 * ixgbe_check_overtemp_subtask - check for over temperature
2328 * @adapter: pointer to adapter
2329 **/
2330 static void ixgbe_check_overtemp_subtask(struct ixgbe_adapter *adapter)
2331 {
2332 struct ixgbe_hw *hw = &adapter->hw;
2333 u32 eicr = adapter->interrupt_event;
2334
2335 if (test_bit(__IXGBE_DOWN, &adapter->state))
2336 return;
2337
2338 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
2339 !(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_EVENT))
2340 return;
2341
2342 adapter->flags2 &= ~IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2343
2344 switch (hw->device_id) {
2345 case IXGBE_DEV_ID_82599_T3_LOM:
2346 /*
2347 * Since the warning interrupt is for both ports
2348 * we don't have to check if:
2349 * - This interrupt wasn't for our port.
2350 * - We may have missed the interrupt so always have to
2351 * check if we got a LSC
2352 */
2353 if (!(eicr & IXGBE_EICR_GPI_SDP0) &&
2354 !(eicr & IXGBE_EICR_LSC))
2355 return;
2356
2357 if (!(eicr & IXGBE_EICR_LSC) && hw->mac.ops.check_link) {
2358 u32 speed;
2359 bool link_up = false;
2360
2361 hw->mac.ops.check_link(hw, &speed, &link_up, false);
2362
2363 if (link_up)
2364 return;
2365 }
2366
2367 /* Check if this is not due to overtemp */
2368 if (hw->phy.ops.check_overtemp(hw) != IXGBE_ERR_OVERTEMP)
2369 return;
2370
2371 break;
2372 default:
2373 if (!(eicr & IXGBE_EICR_GPI_SDP0))
2374 return;
2375 break;
2376 }
2377 e_crit(drv,
2378 "Network adapter has been stopped because it has over heated. "
2379 "Restart the computer. If the problem persists, "
2380 "power off the system and replace the adapter\n");
2381
2382 adapter->interrupt_event = 0;
2383 }
2384
2385 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
2386 {
2387 struct ixgbe_hw *hw = &adapter->hw;
2388
2389 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
2390 (eicr & IXGBE_EICR_GPI_SDP1)) {
2391 e_crit(probe, "Fan has stopped, replace the adapter\n");
2392 /* write to clear the interrupt */
2393 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
2394 }
2395 }
2396
2397 static void ixgbe_check_overtemp_event(struct ixgbe_adapter *adapter, u32 eicr)
2398 {
2399 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE))
2400 return;
2401
2402 switch (adapter->hw.mac.type) {
2403 case ixgbe_mac_82599EB:
2404 /*
2405 * Need to check link state so complete overtemp check
2406 * on service task
2407 */
2408 if (((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)) &&
2409 (!test_bit(__IXGBE_DOWN, &adapter->state))) {
2410 adapter->interrupt_event = eicr;
2411 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2412 ixgbe_service_event_schedule(adapter);
2413 return;
2414 }
2415 return;
2416 case ixgbe_mac_X540:
2417 if (!(eicr & IXGBE_EICR_TS))
2418 return;
2419 break;
2420 default:
2421 return;
2422 }
2423
2424 e_crit(drv,
2425 "Network adapter has been stopped because it has over heated. "
2426 "Restart the computer. If the problem persists, "
2427 "power off the system and replace the adapter\n");
2428 }
2429
2430 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
2431 {
2432 struct ixgbe_hw *hw = &adapter->hw;
2433
2434 if (eicr & IXGBE_EICR_GPI_SDP2) {
2435 /* Clear the interrupt */
2436 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
2437 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2438 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
2439 ixgbe_service_event_schedule(adapter);
2440 }
2441 }
2442
2443 if (eicr & IXGBE_EICR_GPI_SDP1) {
2444 /* Clear the interrupt */
2445 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
2446 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2447 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
2448 ixgbe_service_event_schedule(adapter);
2449 }
2450 }
2451 }
2452
2453 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
2454 {
2455 struct ixgbe_hw *hw = &adapter->hw;
2456
2457 adapter->lsc_int++;
2458 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2459 adapter->link_check_timeout = jiffies;
2460 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2461 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
2462 IXGBE_WRITE_FLUSH(hw);
2463 ixgbe_service_event_schedule(adapter);
2464 }
2465 }
2466
2467 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
2468 u64 qmask)
2469 {
2470 u32 mask;
2471 struct ixgbe_hw *hw = &adapter->hw;
2472
2473 switch (hw->mac.type) {
2474 case ixgbe_mac_82598EB:
2475 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
2476 IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
2477 break;
2478 case ixgbe_mac_82599EB:
2479 case ixgbe_mac_X540:
2480 case ixgbe_mac_X550:
2481 case ixgbe_mac_X550EM_x:
2482 mask = (qmask & 0xFFFFFFFF);
2483 if (mask)
2484 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
2485 mask = (qmask >> 32);
2486 if (mask)
2487 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
2488 break;
2489 default:
2490 break;
2491 }
2492 /* skip the flush */
2493 }
2494
2495 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
2496 u64 qmask)
2497 {
2498 u32 mask;
2499 struct ixgbe_hw *hw = &adapter->hw;
2500
2501 switch (hw->mac.type) {
2502 case ixgbe_mac_82598EB:
2503 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
2504 IXGBE_WRITE_REG(hw, IXGBE_EIMC, mask);
2505 break;
2506 case ixgbe_mac_82599EB:
2507 case ixgbe_mac_X540:
2508 case ixgbe_mac_X550:
2509 case ixgbe_mac_X550EM_x:
2510 mask = (qmask & 0xFFFFFFFF);
2511 if (mask)
2512 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(0), mask);
2513 mask = (qmask >> 32);
2514 if (mask)
2515 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(1), mask);
2516 break;
2517 default:
2518 break;
2519 }
2520 /* skip the flush */
2521 }
2522
2523 /**
2524 * ixgbe_irq_enable - Enable default interrupt generation settings
2525 * @adapter: board private structure
2526 **/
2527 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
2528 bool flush)
2529 {
2530 u32 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
2531
2532 /* don't reenable LSC while waiting for link */
2533 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
2534 mask &= ~IXGBE_EIMS_LSC;
2535
2536 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
2537 switch (adapter->hw.mac.type) {
2538 case ixgbe_mac_82599EB:
2539 mask |= IXGBE_EIMS_GPI_SDP0;
2540 break;
2541 case ixgbe_mac_X540:
2542 case ixgbe_mac_X550:
2543 case ixgbe_mac_X550EM_x:
2544 mask |= IXGBE_EIMS_TS;
2545 break;
2546 default:
2547 break;
2548 }
2549 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
2550 mask |= IXGBE_EIMS_GPI_SDP1;
2551 switch (adapter->hw.mac.type) {
2552 case ixgbe_mac_82599EB:
2553 mask |= IXGBE_EIMS_GPI_SDP1;
2554 mask |= IXGBE_EIMS_GPI_SDP2;
2555 /* fall through */
2556 case ixgbe_mac_X540:
2557 case ixgbe_mac_X550:
2558 case ixgbe_mac_X550EM_x:
2559 mask |= IXGBE_EIMS_ECC;
2560 mask |= IXGBE_EIMS_MAILBOX;
2561 break;
2562 default:
2563 break;
2564 }
2565
2566 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
2567 !(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
2568 mask |= IXGBE_EIMS_FLOW_DIR;
2569
2570 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
2571 if (queues)
2572 ixgbe_irq_enable_queues(adapter, ~0);
2573 if (flush)
2574 IXGBE_WRITE_FLUSH(&adapter->hw);
2575 }
2576
2577 static irqreturn_t ixgbe_msix_other(int irq, void *data)
2578 {
2579 struct ixgbe_adapter *adapter = data;
2580 struct ixgbe_hw *hw = &adapter->hw;
2581 u32 eicr;
2582
2583 /*
2584 * Workaround for Silicon errata. Use clear-by-write instead
2585 * of clear-by-read. Reading with EICS will return the
2586 * interrupt causes without clearing, which later be done
2587 * with the write to EICR.
2588 */
2589 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
2590
2591 /* The lower 16bits of the EICR register are for the queue interrupts
2592 * which should be masked here in order to not accidently clear them if
2593 * the bits are high when ixgbe_msix_other is called. There is a race
2594 * condition otherwise which results in possible performance loss
2595 * especially if the ixgbe_msix_other interrupt is triggering
2596 * consistently (as it would when PPS is turned on for the X540 device)
2597 */
2598 eicr &= 0xFFFF0000;
2599
2600 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
2601
2602 if (eicr & IXGBE_EICR_LSC)
2603 ixgbe_check_lsc(adapter);
2604
2605 if (eicr & IXGBE_EICR_MAILBOX)
2606 ixgbe_msg_task(adapter);
2607
2608 switch (hw->mac.type) {
2609 case ixgbe_mac_82599EB:
2610 case ixgbe_mac_X540:
2611 case ixgbe_mac_X550:
2612 case ixgbe_mac_X550EM_x:
2613 if (eicr & IXGBE_EICR_ECC) {
2614 e_info(link, "Received ECC Err, initiating reset\n");
2615 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
2616 ixgbe_service_event_schedule(adapter);
2617 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_ECC);
2618 }
2619 /* Handle Flow Director Full threshold interrupt */
2620 if (eicr & IXGBE_EICR_FLOW_DIR) {
2621 int reinit_count = 0;
2622 int i;
2623 for (i = 0; i < adapter->num_tx_queues; i++) {
2624 struct ixgbe_ring *ring = adapter->tx_ring[i];
2625 if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE,
2626 &ring->state))
2627 reinit_count++;
2628 }
2629 if (reinit_count) {
2630 /* no more flow director interrupts until after init */
2631 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_FLOW_DIR);
2632 adapter->flags2 |= IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
2633 ixgbe_service_event_schedule(adapter);
2634 }
2635 }
2636 ixgbe_check_sfp_event(adapter, eicr);
2637 ixgbe_check_overtemp_event(adapter, eicr);
2638 break;
2639 default:
2640 break;
2641 }
2642
2643 ixgbe_check_fan_failure(adapter, eicr);
2644
2645 if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
2646 ixgbe_ptp_check_pps_event(adapter, eicr);
2647
2648 /* re-enable the original interrupt state, no lsc, no queues */
2649 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2650 ixgbe_irq_enable(adapter, false, false);
2651
2652 return IRQ_HANDLED;
2653 }
2654
2655 static irqreturn_t ixgbe_msix_clean_rings(int irq, void *data)
2656 {
2657 struct ixgbe_q_vector *q_vector = data;
2658
2659 /* EIAM disabled interrupts (on this vector) for us */
2660
2661 if (q_vector->rx.ring || q_vector->tx.ring)
2662 napi_schedule(&q_vector->napi);
2663
2664 return IRQ_HANDLED;
2665 }
2666
2667 /**
2668 * ixgbe_poll - NAPI Rx polling callback
2669 * @napi: structure for representing this polling device
2670 * @budget: how many packets driver is allowed to clean
2671 *
2672 * This function is used for legacy and MSI, NAPI mode
2673 **/
2674 int ixgbe_poll(struct napi_struct *napi, int budget)
2675 {
2676 struct ixgbe_q_vector *q_vector =
2677 container_of(napi, struct ixgbe_q_vector, napi);
2678 struct ixgbe_adapter *adapter = q_vector->adapter;
2679 struct ixgbe_ring *ring;
2680 int per_ring_budget;
2681 bool clean_complete = true;
2682
2683 #ifdef CONFIG_IXGBE_DCA
2684 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2685 ixgbe_update_dca(q_vector);
2686 #endif
2687
2688 ixgbe_for_each_ring(ring, q_vector->tx)
2689 clean_complete &= !!ixgbe_clean_tx_irq(q_vector, ring);
2690
2691 if (!ixgbe_qv_lock_napi(q_vector))
2692 return budget;
2693
2694 /* attempt to distribute budget to each queue fairly, but don't allow
2695 * the budget to go below 1 because we'll exit polling */
2696 if (q_vector->rx.count > 1)
2697 per_ring_budget = max(budget/q_vector->rx.count, 1);
2698 else
2699 per_ring_budget = budget;
2700
2701 ixgbe_for_each_ring(ring, q_vector->rx)
2702 clean_complete &= (ixgbe_clean_rx_irq(q_vector, ring,
2703 per_ring_budget) < per_ring_budget);
2704
2705 ixgbe_qv_unlock_napi(q_vector);
2706 /* If all work not completed, return budget and keep polling */
2707 if (!clean_complete)
2708 return budget;
2709
2710 /* all work done, exit the polling mode */
2711 napi_complete(napi);
2712 if (adapter->rx_itr_setting & 1)
2713 ixgbe_set_itr(q_vector);
2714 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2715 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
2716
2717 return 0;
2718 }
2719
2720 /**
2721 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2722 * @adapter: board private structure
2723 *
2724 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2725 * interrupts from the kernel.
2726 **/
2727 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2728 {
2729 struct net_device *netdev = adapter->netdev;
2730 int vector, err;
2731 int ri = 0, ti = 0;
2732
2733 for (vector = 0; vector < adapter->num_q_vectors; vector++) {
2734 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
2735 struct msix_entry *entry = &adapter->msix_entries[vector];
2736
2737 if (q_vector->tx.ring && q_vector->rx.ring) {
2738 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2739 "%s-%s-%d", netdev->name, "TxRx", ri++);
2740 ti++;
2741 } else if (q_vector->rx.ring) {
2742 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2743 "%s-%s-%d", netdev->name, "rx", ri++);
2744 } else if (q_vector->tx.ring) {
2745 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2746 "%s-%s-%d", netdev->name, "tx", ti++);
2747 } else {
2748 /* skip this unused q_vector */
2749 continue;
2750 }
2751 err = request_irq(entry->vector, &ixgbe_msix_clean_rings, 0,
2752 q_vector->name, q_vector);
2753 if (err) {
2754 e_err(probe, "request_irq failed for MSIX interrupt "
2755 "Error: %d\n", err);
2756 goto free_queue_irqs;
2757 }
2758 /* If Flow Director is enabled, set interrupt affinity */
2759 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2760 /* assign the mask for this irq */
2761 irq_set_affinity_hint(entry->vector,
2762 &q_vector->affinity_mask);
2763 }
2764 }
2765
2766 err = request_irq(adapter->msix_entries[vector].vector,
2767 ixgbe_msix_other, 0, netdev->name, adapter);
2768 if (err) {
2769 e_err(probe, "request_irq for msix_other failed: %d\n", err);
2770 goto free_queue_irqs;
2771 }
2772
2773 return 0;
2774
2775 free_queue_irqs:
2776 while (vector) {
2777 vector--;
2778 irq_set_affinity_hint(adapter->msix_entries[vector].vector,
2779 NULL);
2780 free_irq(adapter->msix_entries[vector].vector,
2781 adapter->q_vector[vector]);
2782 }
2783 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2784 pci_disable_msix(adapter->pdev);
2785 kfree(adapter->msix_entries);
2786 adapter->msix_entries = NULL;
2787 return err;
2788 }
2789
2790 /**
2791 * ixgbe_intr - legacy mode Interrupt Handler
2792 * @irq: interrupt number
2793 * @data: pointer to a network interface device structure
2794 **/
2795 static irqreturn_t ixgbe_intr(int irq, void *data)
2796 {
2797 struct ixgbe_adapter *adapter = data;
2798 struct ixgbe_hw *hw = &adapter->hw;
2799 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2800 u32 eicr;
2801
2802 /*
2803 * Workaround for silicon errata #26 on 82598. Mask the interrupt
2804 * before the read of EICR.
2805 */
2806 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2807
2808 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2809 * therefore no explicit interrupt disable is necessary */
2810 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2811 if (!eicr) {
2812 /*
2813 * shared interrupt alert!
2814 * make sure interrupts are enabled because the read will
2815 * have disabled interrupts due to EIAM
2816 * finish the workaround of silicon errata on 82598. Unmask
2817 * the interrupt that we masked before the EICR read.
2818 */
2819 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2820 ixgbe_irq_enable(adapter, true, true);
2821 return IRQ_NONE; /* Not our interrupt */
2822 }
2823
2824 if (eicr & IXGBE_EICR_LSC)
2825 ixgbe_check_lsc(adapter);
2826
2827 switch (hw->mac.type) {
2828 case ixgbe_mac_82599EB:
2829 ixgbe_check_sfp_event(adapter, eicr);
2830 /* Fall through */
2831 case ixgbe_mac_X540:
2832 case ixgbe_mac_X550:
2833 case ixgbe_mac_X550EM_x:
2834 if (eicr & IXGBE_EICR_ECC) {
2835 e_info(link, "Received ECC Err, initiating reset\n");
2836 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
2837 ixgbe_service_event_schedule(adapter);
2838 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_ECC);
2839 }
2840 ixgbe_check_overtemp_event(adapter, eicr);
2841 break;
2842 default:
2843 break;
2844 }
2845
2846 ixgbe_check_fan_failure(adapter, eicr);
2847 if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
2848 ixgbe_ptp_check_pps_event(adapter, eicr);
2849
2850 /* would disable interrupts here but EIAM disabled it */
2851 napi_schedule(&q_vector->napi);
2852
2853 /*
2854 * re-enable link(maybe) and non-queue interrupts, no flush.
2855 * ixgbe_poll will re-enable the queue interrupts
2856 */
2857 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2858 ixgbe_irq_enable(adapter, false, false);
2859
2860 return IRQ_HANDLED;
2861 }
2862
2863 /**
2864 * ixgbe_request_irq - initialize interrupts
2865 * @adapter: board private structure
2866 *
2867 * Attempts to configure interrupts using the best available
2868 * capabilities of the hardware and kernel.
2869 **/
2870 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
2871 {
2872 struct net_device *netdev = adapter->netdev;
2873 int err;
2874
2875 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2876 err = ixgbe_request_msix_irqs(adapter);
2877 else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED)
2878 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
2879 netdev->name, adapter);
2880 else
2881 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
2882 netdev->name, adapter);
2883
2884 if (err)
2885 e_err(probe, "request_irq failed, Error %d\n", err);
2886
2887 return err;
2888 }
2889
2890 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
2891 {
2892 int vector;
2893
2894 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
2895 free_irq(adapter->pdev->irq, adapter);
2896 return;
2897 }
2898
2899 for (vector = 0; vector < adapter->num_q_vectors; vector++) {
2900 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
2901 struct msix_entry *entry = &adapter->msix_entries[vector];
2902
2903 /* free only the irqs that were actually requested */
2904 if (!q_vector->rx.ring && !q_vector->tx.ring)
2905 continue;
2906
2907 /* clear the affinity_mask in the IRQ descriptor */
2908 irq_set_affinity_hint(entry->vector, NULL);
2909
2910 free_irq(entry->vector, q_vector);
2911 }
2912
2913 free_irq(adapter->msix_entries[vector++].vector, adapter);
2914 }
2915
2916 /**
2917 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
2918 * @adapter: board private structure
2919 **/
2920 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
2921 {
2922 switch (adapter->hw.mac.type) {
2923 case ixgbe_mac_82598EB:
2924 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
2925 break;
2926 case ixgbe_mac_82599EB:
2927 case ixgbe_mac_X540:
2928 case ixgbe_mac_X550:
2929 case ixgbe_mac_X550EM_x:
2930 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
2931 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
2932 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
2933 break;
2934 default:
2935 break;
2936 }
2937 IXGBE_WRITE_FLUSH(&adapter->hw);
2938 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2939 int vector;
2940
2941 for (vector = 0; vector < adapter->num_q_vectors; vector++)
2942 synchronize_irq(adapter->msix_entries[vector].vector);
2943
2944 synchronize_irq(adapter->msix_entries[vector++].vector);
2945 } else {
2946 synchronize_irq(adapter->pdev->irq);
2947 }
2948 }
2949
2950 /**
2951 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
2952 *
2953 **/
2954 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
2955 {
2956 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2957
2958 ixgbe_write_eitr(q_vector);
2959
2960 ixgbe_set_ivar(adapter, 0, 0, 0);
2961 ixgbe_set_ivar(adapter, 1, 0, 0);
2962
2963 e_info(hw, "Legacy interrupt IVAR setup done\n");
2964 }
2965
2966 /**
2967 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
2968 * @adapter: board private structure
2969 * @ring: structure containing ring specific data
2970 *
2971 * Configure the Tx descriptor ring after a reset.
2972 **/
2973 void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
2974 struct ixgbe_ring *ring)
2975 {
2976 struct ixgbe_hw *hw = &adapter->hw;
2977 u64 tdba = ring->dma;
2978 int wait_loop = 10;
2979 u32 txdctl = IXGBE_TXDCTL_ENABLE;
2980 u8 reg_idx = ring->reg_idx;
2981
2982 /* disable queue to avoid issues while updating state */
2983 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), 0);
2984 IXGBE_WRITE_FLUSH(hw);
2985
2986 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
2987 (tdba & DMA_BIT_MASK(32)));
2988 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
2989 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
2990 ring->count * sizeof(union ixgbe_adv_tx_desc));
2991 IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
2992 IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
2993 ring->tail = adapter->io_addr + IXGBE_TDT(reg_idx);
2994
2995 /*
2996 * set WTHRESH to encourage burst writeback, it should not be set
2997 * higher than 1 when:
2998 * - ITR is 0 as it could cause false TX hangs
2999 * - ITR is set to > 100k int/sec and BQL is enabled
3000 *
3001 * In order to avoid issues WTHRESH + PTHRESH should always be equal
3002 * to or less than the number of on chip descriptors, which is
3003 * currently 40.
3004 */
3005 if (!ring->q_vector || (ring->q_vector->itr < IXGBE_100K_ITR))
3006 txdctl |= (1 << 16); /* WTHRESH = 1 */
3007 else
3008 txdctl |= (8 << 16); /* WTHRESH = 8 */
3009
3010 /*
3011 * Setting PTHRESH to 32 both improves performance
3012 * and avoids a TX hang with DFP enabled
3013 */
3014 txdctl |= (1 << 8) | /* HTHRESH = 1 */
3015 32; /* PTHRESH = 32 */
3016
3017 /* reinitialize flowdirector state */
3018 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3019 ring->atr_sample_rate = adapter->atr_sample_rate;
3020 ring->atr_count = 0;
3021 set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state);
3022 } else {
3023 ring->atr_sample_rate = 0;
3024 }
3025
3026 /* initialize XPS */
3027 if (!test_and_set_bit(__IXGBE_TX_XPS_INIT_DONE, &ring->state)) {
3028 struct ixgbe_q_vector *q_vector = ring->q_vector;
3029
3030 if (q_vector)
3031 netif_set_xps_queue(ring->netdev,
3032 &q_vector->affinity_mask,
3033 ring->queue_index);
3034 }
3035
3036 clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state);
3037
3038 /* enable queue */
3039 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
3040
3041 /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
3042 if (hw->mac.type == ixgbe_mac_82598EB &&
3043 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3044 return;
3045
3046 /* poll to verify queue is enabled */
3047 do {
3048 usleep_range(1000, 2000);
3049 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
3050 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
3051 if (!wait_loop)
3052 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx);
3053 }
3054
3055 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
3056 {
3057 struct ixgbe_hw *hw = &adapter->hw;
3058 u32 rttdcs, mtqc;
3059 u8 tcs = netdev_get_num_tc(adapter->netdev);
3060
3061 if (hw->mac.type == ixgbe_mac_82598EB)
3062 return;
3063
3064 /* disable the arbiter while setting MTQC */
3065 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
3066 rttdcs |= IXGBE_RTTDCS_ARBDIS;
3067 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
3068
3069 /* set transmit pool layout */
3070 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3071 mtqc = IXGBE_MTQC_VT_ENA;
3072 if (tcs > 4)
3073 mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
3074 else if (tcs > 1)
3075 mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
3076 else if (adapter->ring_feature[RING_F_RSS].indices == 4)
3077 mtqc |= IXGBE_MTQC_32VF;
3078 else
3079 mtqc |= IXGBE_MTQC_64VF;
3080 } else {
3081 if (tcs > 4)
3082 mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
3083 else if (tcs > 1)
3084 mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
3085 else
3086 mtqc = IXGBE_MTQC_64Q_1PB;
3087 }
3088
3089 IXGBE_WRITE_REG(hw, IXGBE_MTQC, mtqc);
3090
3091 /* Enable Security TX Buffer IFG for multiple pb */
3092 if (tcs) {
3093 u32 sectx = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);
3094 sectx |= IXGBE_SECTX_DCB;
3095 IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, sectx);
3096 }
3097
3098 /* re-enable the arbiter */
3099 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
3100 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
3101 }
3102
3103 /**
3104 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
3105 * @adapter: board private structure
3106 *
3107 * Configure the Tx unit of the MAC after a reset.
3108 **/
3109 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
3110 {
3111 struct ixgbe_hw *hw = &adapter->hw;
3112 u32 dmatxctl;
3113 u32 i;
3114
3115 ixgbe_setup_mtqc(adapter);
3116
3117 if (hw->mac.type != ixgbe_mac_82598EB) {
3118 /* DMATXCTL.EN must be before Tx queues are enabled */
3119 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
3120 dmatxctl |= IXGBE_DMATXCTL_TE;
3121 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
3122 }
3123
3124 /* Setup the HW Tx Head and Tail descriptor pointers */
3125 for (i = 0; i < adapter->num_tx_queues; i++)
3126 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
3127 }
3128
3129 static void ixgbe_enable_rx_drop(struct ixgbe_adapter *adapter,
3130 struct ixgbe_ring *ring)
3131 {
3132 struct ixgbe_hw *hw = &adapter->hw;
3133 u8 reg_idx = ring->reg_idx;
3134 u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
3135
3136 srrctl |= IXGBE_SRRCTL_DROP_EN;
3137
3138 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3139 }
3140
3141 static void ixgbe_disable_rx_drop(struct ixgbe_adapter *adapter,
3142 struct ixgbe_ring *ring)
3143 {
3144 struct ixgbe_hw *hw = &adapter->hw;
3145 u8 reg_idx = ring->reg_idx;
3146 u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
3147
3148 srrctl &= ~IXGBE_SRRCTL_DROP_EN;
3149
3150 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3151 }
3152
3153 #ifdef CONFIG_IXGBE_DCB
3154 void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
3155 #else
3156 static void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
3157 #endif
3158 {
3159 int i;
3160 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
3161
3162 if (adapter->ixgbe_ieee_pfc)
3163 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
3164
3165 /*
3166 * We should set the drop enable bit if:
3167 * SR-IOV is enabled
3168 * or
3169 * Number of Rx queues > 1 and flow control is disabled
3170 *
3171 * This allows us to avoid head of line blocking for security
3172 * and performance reasons.
3173 */
3174 if (adapter->num_vfs || (adapter->num_rx_queues > 1 &&
3175 !(adapter->hw.fc.current_mode & ixgbe_fc_tx_pause) && !pfc_en)) {
3176 for (i = 0; i < adapter->num_rx_queues; i++)
3177 ixgbe_enable_rx_drop(adapter, adapter->rx_ring[i]);
3178 } else {
3179 for (i = 0; i < adapter->num_rx_queues; i++)
3180 ixgbe_disable_rx_drop(adapter, adapter->rx_ring[i]);
3181 }
3182 }
3183
3184 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
3185
3186 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
3187 struct ixgbe_ring *rx_ring)
3188 {
3189 struct ixgbe_hw *hw = &adapter->hw;
3190 u32 srrctl;
3191 u8 reg_idx = rx_ring->reg_idx;
3192
3193 if (hw->mac.type == ixgbe_mac_82598EB) {
3194 u16 mask = adapter->ring_feature[RING_F_RSS].mask;
3195
3196 /*
3197 * if VMDq is not active we must program one srrctl register
3198 * per RSS queue since we have enabled RDRXCTL.MVMEN
3199 */
3200 reg_idx &= mask;
3201 }
3202
3203 /* configure header buffer length, needed for RSC */
3204 srrctl = IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;
3205
3206 /* configure the packet buffer length */
3207 srrctl |= ixgbe_rx_bufsz(rx_ring) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
3208
3209 /* configure descriptor type */
3210 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
3211
3212 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3213 }
3214
3215 static void ixgbe_setup_reta(struct ixgbe_adapter *adapter, const u32 *seed)
3216 {
3217 struct ixgbe_hw *hw = &adapter->hw;
3218 u32 reta = 0;
3219 int i, j;
3220 int reta_entries = 128;
3221 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;
3222 int indices_multi;
3223
3224 /*
3225 * Program table for at least 2 queues w/ SR-IOV so that VFs can
3226 * make full use of any rings they may have. We will use the
3227 * PSRTYPE register to control how many rings we use within the PF.
3228 */
3229 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) && (rss_i < 2))
3230 rss_i = 2;
3231
3232 /* Fill out hash function seeds */
3233 for (i = 0; i < 10; i++)
3234 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
3235
3236 /* Fill out the redirection table as follows:
3237 * 82598: 128 (8 bit wide) entries containing pair of 4 bit RSS indices
3238 * 82599/X540: 128 (8 bit wide) entries containing 4 bit RSS index
3239 * X550: 512 (8 bit wide) entries containing 6 bit RSS index
3240 */
3241 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
3242 indices_multi = 0x11;
3243 else
3244 indices_multi = 0x1;
3245
3246 switch (adapter->hw.mac.type) {
3247 case ixgbe_mac_X550:
3248 case ixgbe_mac_X550EM_x:
3249 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
3250 reta_entries = 512;
3251 default:
3252 break;
3253 }
3254
3255 /* Fill out redirection table */
3256 for (i = 0, j = 0; i < reta_entries; i++, j++) {
3257 if (j == rss_i)
3258 j = 0;
3259 reta = (reta << 8) | (j * indices_multi);
3260 if ((i & 3) == 3) {
3261 if (i < 128)
3262 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
3263 else
3264 IXGBE_WRITE_REG(hw, IXGBE_ERETA((i >> 2) - 32),
3265 reta);
3266 }
3267 }
3268 }
3269
3270 static void ixgbe_setup_vfreta(struct ixgbe_adapter *adapter, const u32 *seed)
3271 {
3272 struct ixgbe_hw *hw = &adapter->hw;
3273 u32 vfreta = 0;
3274 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;
3275 unsigned int pf_pool = adapter->num_vfs;
3276 int i, j;
3277
3278 /* Fill out hash function seeds */
3279 for (i = 0; i < 10; i++)
3280 IXGBE_WRITE_REG(hw, IXGBE_PFVFRSSRK(i, pf_pool), seed[i]);
3281
3282 /* Fill out the redirection table */
3283 for (i = 0, j = 0; i < 64; i++, j++) {
3284 if (j == rss_i)
3285 j = 0;
3286 vfreta = (vfreta << 8) | j;
3287 if ((i & 3) == 3)
3288 IXGBE_WRITE_REG(hw, IXGBE_PFVFRETA(i >> 2, pf_pool),
3289 vfreta);
3290 }
3291 }
3292
3293 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
3294 {
3295 struct ixgbe_hw *hw = &adapter->hw;
3296 u32 mrqc = 0, rss_field = 0, vfmrqc = 0;
3297 u32 rss_key[10];
3298 u32 rxcsum;
3299
3300 /* Disable indicating checksum in descriptor, enables RSS hash */
3301 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
3302 rxcsum |= IXGBE_RXCSUM_PCSD;
3303 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
3304
3305 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
3306 if (adapter->ring_feature[RING_F_RSS].mask)
3307 mrqc = IXGBE_MRQC_RSSEN;
3308 } else {
3309 u8 tcs = netdev_get_num_tc(adapter->netdev);
3310
3311 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3312 if (tcs > 4)
3313 mrqc = IXGBE_MRQC_VMDQRT8TCEN; /* 8 TCs */
3314 else if (tcs > 1)
3315 mrqc = IXGBE_MRQC_VMDQRT4TCEN; /* 4 TCs */
3316 else if (adapter->ring_feature[RING_F_RSS].indices == 4)
3317 mrqc = IXGBE_MRQC_VMDQRSS32EN;
3318 else
3319 mrqc = IXGBE_MRQC_VMDQRSS64EN;
3320 } else {
3321 if (tcs > 4)
3322 mrqc = IXGBE_MRQC_RTRSS8TCEN;
3323 else if (tcs > 1)
3324 mrqc = IXGBE_MRQC_RTRSS4TCEN;
3325 else
3326 mrqc = IXGBE_MRQC_RSSEN;
3327 }
3328 }
3329
3330 /* Perform hash on these packet types */
3331 rss_field |= IXGBE_MRQC_RSS_FIELD_IPV4 |
3332 IXGBE_MRQC_RSS_FIELD_IPV4_TCP |
3333 IXGBE_MRQC_RSS_FIELD_IPV6 |
3334 IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
3335
3336 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV4_UDP)
3337 rss_field |= IXGBE_MRQC_RSS_FIELD_IPV4_UDP;
3338 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV6_UDP)
3339 rss_field |= IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
3340
3341 netdev_rss_key_fill(rss_key, sizeof(rss_key));
3342 if ((hw->mac.type >= ixgbe_mac_X550) &&
3343 (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)) {
3344 unsigned int pf_pool = adapter->num_vfs;
3345
3346 /* Enable VF RSS mode */
3347 mrqc |= IXGBE_MRQC_MULTIPLE_RSS;
3348 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
3349
3350 /* Setup RSS through the VF registers */
3351 ixgbe_setup_vfreta(adapter, rss_key);
3352 vfmrqc = IXGBE_MRQC_RSSEN;
3353 vfmrqc |= rss_field;
3354 IXGBE_WRITE_REG(hw, IXGBE_PFVFMRQC(pf_pool), vfmrqc);
3355 } else {
3356 ixgbe_setup_reta(adapter, rss_key);
3357 mrqc |= rss_field;
3358 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
3359 }
3360 }
3361
3362 /**
3363 * ixgbe_configure_rscctl - enable RSC for the indicated ring
3364 * @adapter: address of board private structure
3365 * @index: index of ring to set
3366 **/
3367 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
3368 struct ixgbe_ring *ring)
3369 {
3370 struct ixgbe_hw *hw = &adapter->hw;
3371 u32 rscctrl;
3372 u8 reg_idx = ring->reg_idx;
3373
3374 if (!ring_is_rsc_enabled(ring))
3375 return;
3376
3377 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
3378 rscctrl |= IXGBE_RSCCTL_RSCEN;
3379 /*
3380 * we must limit the number of descriptors so that the
3381 * total size of max desc * buf_len is not greater
3382 * than 65536
3383 */
3384 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
3385 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
3386 }
3387
3388 #define IXGBE_MAX_RX_DESC_POLL 10
3389 static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
3390 struct ixgbe_ring *ring)
3391 {
3392 struct ixgbe_hw *hw = &adapter->hw;
3393 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3394 u32 rxdctl;
3395 u8 reg_idx = ring->reg_idx;
3396
3397 if (ixgbe_removed(hw->hw_addr))
3398 return;
3399 /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
3400 if (hw->mac.type == ixgbe_mac_82598EB &&
3401 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3402 return;
3403
3404 do {
3405 usleep_range(1000, 2000);
3406 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3407 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
3408
3409 if (!wait_loop) {
3410 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
3411 "the polling period\n", reg_idx);
3412 }
3413 }
3414
3415 void ixgbe_disable_rx_queue(struct ixgbe_adapter *adapter,
3416 struct ixgbe_ring *ring)
3417 {
3418 struct ixgbe_hw *hw = &adapter->hw;
3419 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3420 u32 rxdctl;
3421 u8 reg_idx = ring->reg_idx;
3422
3423 if (ixgbe_removed(hw->hw_addr))
3424 return;
3425 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3426 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
3427
3428 /* write value back with RXDCTL.ENABLE bit cleared */
3429 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3430
3431 if (hw->mac.type == ixgbe_mac_82598EB &&
3432 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3433 return;
3434
3435 /* the hardware may take up to 100us to really disable the rx queue */
3436 do {
3437 udelay(10);
3438 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3439 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
3440
3441 if (!wait_loop) {
3442 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not cleared within "
3443 "the polling period\n", reg_idx);
3444 }
3445 }
3446
3447 void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
3448 struct ixgbe_ring *ring)
3449 {
3450 struct ixgbe_hw *hw = &adapter->hw;
3451 u64 rdba = ring->dma;
3452 u32 rxdctl;
3453 u8 reg_idx = ring->reg_idx;
3454
3455 /* disable queue to avoid issues while updating state */
3456 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3457 ixgbe_disable_rx_queue(adapter, ring);
3458
3459 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
3460 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
3461 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
3462 ring->count * sizeof(union ixgbe_adv_rx_desc));
3463 IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
3464 IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
3465 ring->tail = adapter->io_addr + IXGBE_RDT(reg_idx);
3466
3467 ixgbe_configure_srrctl(adapter, ring);
3468 ixgbe_configure_rscctl(adapter, ring);
3469
3470 if (hw->mac.type == ixgbe_mac_82598EB) {
3471 /*
3472 * enable cache line friendly hardware writes:
3473 * PTHRESH=32 descriptors (half the internal cache),
3474 * this also removes ugly rx_no_buffer_count increment
3475 * HTHRESH=4 descriptors (to minimize latency on fetch)
3476 * WTHRESH=8 burst writeback up to two cache lines
3477 */
3478 rxdctl &= ~0x3FFFFF;
3479 rxdctl |= 0x080420;
3480 }
3481
3482 /* enable receive descriptor ring */
3483 rxdctl |= IXGBE_RXDCTL_ENABLE;
3484 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3485
3486 ixgbe_rx_desc_queue_enable(adapter, ring);
3487 ixgbe_alloc_rx_buffers(ring, ixgbe_desc_unused(ring));
3488 }
3489
3490 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
3491 {
3492 struct ixgbe_hw *hw = &adapter->hw;
3493 int rss_i = adapter->ring_feature[RING_F_RSS].indices;
3494 u16 pool;
3495
3496 /* PSRTYPE must be initialized in non 82598 adapters */
3497 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
3498 IXGBE_PSRTYPE_UDPHDR |
3499 IXGBE_PSRTYPE_IPV4HDR |
3500 IXGBE_PSRTYPE_L2HDR |
3501 IXGBE_PSRTYPE_IPV6HDR;
3502
3503 if (hw->mac.type == ixgbe_mac_82598EB)
3504 return;
3505
3506 if (rss_i > 3)
3507 psrtype |= 2 << 29;
3508 else if (rss_i > 1)
3509 psrtype |= 1 << 29;
3510
3511 for_each_set_bit(pool, &adapter->fwd_bitmask, 32)
3512 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(VMDQ_P(pool)), psrtype);
3513 }
3514
3515 static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
3516 {
3517 struct ixgbe_hw *hw = &adapter->hw;
3518 u32 reg_offset, vf_shift;
3519 u32 gcr_ext, vmdctl;
3520 int i;
3521
3522 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
3523 return;
3524
3525 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
3526 vmdctl |= IXGBE_VMD_CTL_VMDQ_EN;
3527 vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
3528 vmdctl |= VMDQ_P(0) << IXGBE_VT_CTL_POOL_SHIFT;
3529 vmdctl |= IXGBE_VT_CTL_REPLEN;
3530 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
3531
3532 vf_shift = VMDQ_P(0) % 32;
3533 reg_offset = (VMDQ_P(0) >= 32) ? 1 : 0;
3534
3535 /* Enable only the PF's pool for Tx/Rx */
3536 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (~0) << vf_shift);
3537 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), reg_offset - 1);
3538 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (~0) << vf_shift);
3539 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), reg_offset - 1);
3540 if (adapter->flags2 & IXGBE_FLAG2_BRIDGE_MODE_VEB)
3541 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
3542
3543 /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
3544 hw->mac.ops.set_vmdq(hw, 0, VMDQ_P(0));
3545
3546 /*
3547 * Set up VF register offsets for selected VT Mode,
3548 * i.e. 32 or 64 VFs for SR-IOV
3549 */
3550 switch (adapter->ring_feature[RING_F_VMDQ].mask) {
3551 case IXGBE_82599_VMDQ_8Q_MASK:
3552 gcr_ext = IXGBE_GCR_EXT_VT_MODE_16;
3553 break;
3554 case IXGBE_82599_VMDQ_4Q_MASK:
3555 gcr_ext = IXGBE_GCR_EXT_VT_MODE_32;
3556 break;
3557 default:
3558 gcr_ext = IXGBE_GCR_EXT_VT_MODE_64;
3559 break;
3560 }
3561
3562 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
3563
3564
3565 /* Enable MAC Anti-Spoofing */
3566 hw->mac.ops.set_mac_anti_spoofing(hw, (adapter->num_vfs != 0),
3567 adapter->num_vfs);
3568 /* For VFs that have spoof checking turned off */
3569 for (i = 0; i < adapter->num_vfs; i++) {
3570 if (!adapter->vfinfo[i].spoofchk_enabled)
3571 ixgbe_ndo_set_vf_spoofchk(adapter->netdev, i, false);
3572 }
3573 }
3574
3575 static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
3576 {
3577 struct ixgbe_hw *hw = &adapter->hw;
3578 struct net_device *netdev = adapter->netdev;
3579 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3580 struct ixgbe_ring *rx_ring;
3581 int i;
3582 u32 mhadd, hlreg0;
3583
3584 #ifdef IXGBE_FCOE
3585 /* adjust max frame to be able to do baby jumbo for FCoE */
3586 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
3587 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
3588 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
3589
3590 #endif /* IXGBE_FCOE */
3591
3592 /* adjust max frame to be at least the size of a standard frame */
3593 if (max_frame < (ETH_FRAME_LEN + ETH_FCS_LEN))
3594 max_frame = (ETH_FRAME_LEN + ETH_FCS_LEN);
3595
3596 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
3597 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
3598 mhadd &= ~IXGBE_MHADD_MFS_MASK;
3599 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
3600
3601 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
3602 }
3603
3604 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
3605 /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
3606 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
3607 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
3608
3609 /*
3610 * Setup the HW Rx Head and Tail Descriptor Pointers and
3611 * the Base and Length of the Rx Descriptor Ring
3612 */
3613 for (i = 0; i < adapter->num_rx_queues; i++) {
3614 rx_ring = adapter->rx_ring[i];
3615 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
3616 set_ring_rsc_enabled(rx_ring);
3617 else
3618 clear_ring_rsc_enabled(rx_ring);
3619 }
3620 }
3621
3622 static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
3623 {
3624 struct ixgbe_hw *hw = &adapter->hw;
3625 u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
3626
3627 switch (hw->mac.type) {
3628 case ixgbe_mac_X550:
3629 case ixgbe_mac_X550EM_x:
3630 case ixgbe_mac_82598EB:
3631 /*
3632 * For VMDq support of different descriptor types or
3633 * buffer sizes through the use of multiple SRRCTL
3634 * registers, RDRXCTL.MVMEN must be set to 1
3635 *
3636 * also, the manual doesn't mention it clearly but DCA hints
3637 * will only use queue 0's tags unless this bit is set. Side
3638 * effects of setting this bit are only that SRRCTL must be
3639 * fully programmed [0..15]
3640 */
3641 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
3642 break;
3643 case ixgbe_mac_82599EB:
3644 case ixgbe_mac_X540:
3645 /* Disable RSC for ACK packets */
3646 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
3647 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
3648 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
3649 /* hardware requires some bits to be set by default */
3650 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
3651 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
3652 break;
3653 default:
3654 /* We should do nothing since we don't know this hardware */
3655 return;
3656 }
3657
3658 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
3659 }
3660
3661 /**
3662 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
3663 * @adapter: board private structure
3664 *
3665 * Configure the Rx unit of the MAC after a reset.
3666 **/
3667 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
3668 {
3669 struct ixgbe_hw *hw = &adapter->hw;
3670 int i;
3671 u32 rxctrl, rfctl;
3672
3673 /* disable receives while setting up the descriptors */
3674 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3675 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3676
3677 ixgbe_setup_psrtype(adapter);
3678 ixgbe_setup_rdrxctl(adapter);
3679
3680 /* RSC Setup */
3681 rfctl = IXGBE_READ_REG(hw, IXGBE_RFCTL);
3682 rfctl &= ~IXGBE_RFCTL_RSC_DIS;
3683 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
3684 rfctl |= IXGBE_RFCTL_RSC_DIS;
3685 IXGBE_WRITE_REG(hw, IXGBE_RFCTL, rfctl);
3686
3687 /* Program registers for the distribution of queues */
3688 ixgbe_setup_mrqc(adapter);
3689
3690 /* set_rx_buffer_len must be called before ring initialization */
3691 ixgbe_set_rx_buffer_len(adapter);
3692
3693 /*
3694 * Setup the HW Rx Head and Tail Descriptor Pointers and
3695 * the Base and Length of the Rx Descriptor Ring
3696 */
3697 for (i = 0; i < adapter->num_rx_queues; i++)
3698 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
3699
3700 /* disable drop enable for 82598 parts */
3701 if (hw->mac.type == ixgbe_mac_82598EB)
3702 rxctrl |= IXGBE_RXCTRL_DMBYPS;
3703
3704 /* enable all receives */
3705 rxctrl |= IXGBE_RXCTRL_RXEN;
3706 hw->mac.ops.enable_rx_dma(hw, rxctrl);
3707 }
3708
3709 static int ixgbe_vlan_rx_add_vid(struct net_device *netdev,
3710 __be16 proto, u16 vid)
3711 {
3712 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3713 struct ixgbe_hw *hw = &adapter->hw;
3714
3715 /* add VID to filter table */
3716 hw->mac.ops.set_vfta(&adapter->hw, vid, VMDQ_P(0), true);
3717 set_bit(vid, adapter->active_vlans);
3718
3719 return 0;
3720 }
3721
3722 static int ixgbe_vlan_rx_kill_vid(struct net_device *netdev,
3723 __be16 proto, u16 vid)
3724 {
3725 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3726 struct ixgbe_hw *hw = &adapter->hw;
3727
3728 /* remove VID from filter table */
3729 hw->mac.ops.set_vfta(&adapter->hw, vid, VMDQ_P(0), false);
3730 clear_bit(vid, adapter->active_vlans);
3731
3732 return 0;
3733 }
3734
3735 /**
3736 * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping
3737 * @adapter: driver data
3738 */
3739 static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
3740 {
3741 struct ixgbe_hw *hw = &adapter->hw;
3742 u32 vlnctrl;
3743 int i, j;
3744
3745 switch (hw->mac.type) {
3746 case ixgbe_mac_82598EB:
3747 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3748 vlnctrl &= ~IXGBE_VLNCTRL_VME;
3749 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3750 break;
3751 case ixgbe_mac_82599EB:
3752 case ixgbe_mac_X540:
3753 case ixgbe_mac_X550:
3754 case ixgbe_mac_X550EM_x:
3755 for (i = 0; i < adapter->num_rx_queues; i++) {
3756 struct ixgbe_ring *ring = adapter->rx_ring[i];
3757
3758 if (ring->l2_accel_priv)
3759 continue;
3760 j = ring->reg_idx;
3761 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3762 vlnctrl &= ~IXGBE_RXDCTL_VME;
3763 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3764 }
3765 break;
3766 default:
3767 break;
3768 }
3769 }
3770
3771 /**
3772 * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping
3773 * @adapter: driver data
3774 */
3775 static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
3776 {
3777 struct ixgbe_hw *hw = &adapter->hw;
3778 u32 vlnctrl;
3779 int i, j;
3780
3781 switch (hw->mac.type) {
3782 case ixgbe_mac_82598EB:
3783 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3784 vlnctrl |= IXGBE_VLNCTRL_VME;
3785 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3786 break;
3787 case ixgbe_mac_82599EB:
3788 case ixgbe_mac_X540:
3789 case ixgbe_mac_X550:
3790 case ixgbe_mac_X550EM_x:
3791 for (i = 0; i < adapter->num_rx_queues; i++) {
3792 struct ixgbe_ring *ring = adapter->rx_ring[i];
3793
3794 if (ring->l2_accel_priv)
3795 continue;
3796 j = ring->reg_idx;
3797 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3798 vlnctrl |= IXGBE_RXDCTL_VME;
3799 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3800 }
3801 break;
3802 default:
3803 break;
3804 }
3805 }
3806
3807 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
3808 {
3809 u16 vid;
3810
3811 ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0);
3812
3813 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
3814 ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
3815 }
3816
3817 /**
3818 * ixgbe_write_mc_addr_list - write multicast addresses to MTA
3819 * @netdev: network interface device structure
3820 *
3821 * Writes multicast address list to the MTA hash table.
3822 * Returns: -ENOMEM on failure
3823 * 0 on no addresses written
3824 * X on writing X addresses to MTA
3825 **/
3826 static int ixgbe_write_mc_addr_list(struct net_device *netdev)
3827 {
3828 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3829 struct ixgbe_hw *hw = &adapter->hw;
3830
3831 if (!netif_running(netdev))
3832 return 0;
3833
3834 if (hw->mac.ops.update_mc_addr_list)
3835 hw->mac.ops.update_mc_addr_list(hw, netdev);
3836 else
3837 return -ENOMEM;
3838
3839 #ifdef CONFIG_PCI_IOV
3840 ixgbe_restore_vf_multicasts(adapter);
3841 #endif
3842
3843 return netdev_mc_count(netdev);
3844 }
3845
3846 #ifdef CONFIG_PCI_IOV
3847 void ixgbe_full_sync_mac_table(struct ixgbe_adapter *adapter)
3848 {
3849 struct ixgbe_hw *hw = &adapter->hw;
3850 int i;
3851 for (i = 0; i < hw->mac.num_rar_entries; i++) {
3852 if (adapter->mac_table[i].state & IXGBE_MAC_STATE_IN_USE)
3853 hw->mac.ops.set_rar(hw, i, adapter->mac_table[i].addr,
3854 adapter->mac_table[i].queue,
3855 IXGBE_RAH_AV);
3856 else
3857 hw->mac.ops.clear_rar(hw, i);
3858
3859 adapter->mac_table[i].state &= ~(IXGBE_MAC_STATE_MODIFIED);
3860 }
3861 }
3862 #endif
3863
3864 static void ixgbe_sync_mac_table(struct ixgbe_adapter *adapter)
3865 {
3866 struct ixgbe_hw *hw = &adapter->hw;
3867 int i;
3868 for (i = 0; i < hw->mac.num_rar_entries; i++) {
3869 if (adapter->mac_table[i].state & IXGBE_MAC_STATE_MODIFIED) {
3870 if (adapter->mac_table[i].state &
3871 IXGBE_MAC_STATE_IN_USE)
3872 hw->mac.ops.set_rar(hw, i,
3873 adapter->mac_table[i].addr,
3874 adapter->mac_table[i].queue,
3875 IXGBE_RAH_AV);
3876 else
3877 hw->mac.ops.clear_rar(hw, i);
3878
3879 adapter->mac_table[i].state &=
3880 ~(IXGBE_MAC_STATE_MODIFIED);
3881 }
3882 }
3883 }
3884
3885 static void ixgbe_flush_sw_mac_table(struct ixgbe_adapter *adapter)
3886 {
3887 int i;
3888 struct ixgbe_hw *hw = &adapter->hw;
3889
3890 for (i = 0; i < hw->mac.num_rar_entries; i++) {
3891 adapter->mac_table[i].state |= IXGBE_MAC_STATE_MODIFIED;
3892 adapter->mac_table[i].state &= ~IXGBE_MAC_STATE_IN_USE;
3893 memset(adapter->mac_table[i].addr, 0, ETH_ALEN);
3894 adapter->mac_table[i].queue = 0;
3895 }
3896 ixgbe_sync_mac_table(adapter);
3897 }
3898
3899 static int ixgbe_available_rars(struct ixgbe_adapter *adapter)
3900 {
3901 struct ixgbe_hw *hw = &adapter->hw;
3902 int i, count = 0;
3903
3904 for (i = 0; i < hw->mac.num_rar_entries; i++) {
3905 if (adapter->mac_table[i].state == 0)
3906 count++;
3907 }
3908 return count;
3909 }
3910
3911 /* this function destroys the first RAR entry */
3912 static void ixgbe_mac_set_default_filter(struct ixgbe_adapter *adapter,
3913 u8 *addr)
3914 {
3915 struct ixgbe_hw *hw = &adapter->hw;
3916
3917 memcpy(&adapter->mac_table[0].addr, addr, ETH_ALEN);
3918 adapter->mac_table[0].queue = VMDQ_P(0);
3919 adapter->mac_table[0].state = (IXGBE_MAC_STATE_DEFAULT |
3920 IXGBE_MAC_STATE_IN_USE);
3921 hw->mac.ops.set_rar(hw, 0, adapter->mac_table[0].addr,
3922 adapter->mac_table[0].queue,
3923 IXGBE_RAH_AV);
3924 }
3925
3926 int ixgbe_add_mac_filter(struct ixgbe_adapter *adapter, u8 *addr, u16 queue)
3927 {
3928 struct ixgbe_hw *hw = &adapter->hw;
3929 int i;
3930
3931 if (is_zero_ether_addr(addr))
3932 return -EINVAL;
3933
3934 for (i = 0; i < hw->mac.num_rar_entries; i++) {
3935 if (adapter->mac_table[i].state & IXGBE_MAC_STATE_IN_USE)
3936 continue;
3937 adapter->mac_table[i].state |= (IXGBE_MAC_STATE_MODIFIED |
3938 IXGBE_MAC_STATE_IN_USE);
3939 ether_addr_copy(adapter->mac_table[i].addr, addr);
3940 adapter->mac_table[i].queue = queue;
3941 ixgbe_sync_mac_table(adapter);
3942 return i;
3943 }
3944 return -ENOMEM;
3945 }
3946
3947 int ixgbe_del_mac_filter(struct ixgbe_adapter *adapter, u8 *addr, u16 queue)
3948 {
3949 /* search table for addr, if found, set to 0 and sync */
3950 int i;
3951 struct ixgbe_hw *hw = &adapter->hw;
3952
3953 if (is_zero_ether_addr(addr))
3954 return -EINVAL;
3955
3956 for (i = 0; i < hw->mac.num_rar_entries; i++) {
3957 if (ether_addr_equal(addr, adapter->mac_table[i].addr) &&
3958 adapter->mac_table[i].queue == queue) {
3959 adapter->mac_table[i].state |= IXGBE_MAC_STATE_MODIFIED;
3960 adapter->mac_table[i].state &= ~IXGBE_MAC_STATE_IN_USE;
3961 memset(adapter->mac_table[i].addr, 0, ETH_ALEN);
3962 adapter->mac_table[i].queue = 0;
3963 ixgbe_sync_mac_table(adapter);
3964 return 0;
3965 }
3966 }
3967 return -ENOMEM;
3968 }
3969 /**
3970 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
3971 * @netdev: network interface device structure
3972 *
3973 * Writes unicast address list to the RAR table.
3974 * Returns: -ENOMEM on failure/insufficient address space
3975 * 0 on no addresses written
3976 * X on writing X addresses to the RAR table
3977 **/
3978 static int ixgbe_write_uc_addr_list(struct net_device *netdev, int vfn)
3979 {
3980 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3981 int count = 0;
3982
3983 /* return ENOMEM indicating insufficient memory for addresses */
3984 if (netdev_uc_count(netdev) > ixgbe_available_rars(adapter))
3985 return -ENOMEM;
3986
3987 if (!netdev_uc_empty(netdev)) {
3988 struct netdev_hw_addr *ha;
3989 netdev_for_each_uc_addr(ha, netdev) {
3990 ixgbe_del_mac_filter(adapter, ha->addr, vfn);
3991 ixgbe_add_mac_filter(adapter, ha->addr, vfn);
3992 count++;
3993 }
3994 }
3995 return count;
3996 }
3997
3998 /**
3999 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
4000 * @netdev: network interface device structure
4001 *
4002 * The set_rx_method entry point is called whenever the unicast/multicast
4003 * address list or the network interface flags are updated. This routine is
4004 * responsible for configuring the hardware for proper unicast, multicast and
4005 * promiscuous mode.
4006 **/
4007 void ixgbe_set_rx_mode(struct net_device *netdev)
4008 {
4009 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4010 struct ixgbe_hw *hw = &adapter->hw;
4011 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
4012 u32 vlnctrl;
4013 int count;
4014
4015 /* Check for Promiscuous and All Multicast modes */
4016 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4017 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
4018
4019 /* set all bits that we expect to always be set */
4020 fctrl &= ~IXGBE_FCTRL_SBP; /* disable store-bad-packets */
4021 fctrl |= IXGBE_FCTRL_BAM;
4022 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
4023 fctrl |= IXGBE_FCTRL_PMCF;
4024
4025 /* clear the bits we are changing the status of */
4026 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
4027 vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
4028 if (netdev->flags & IFF_PROMISC) {
4029 hw->addr_ctrl.user_set_promisc = true;
4030 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
4031 vmolr |= IXGBE_VMOLR_MPE;
4032 /* Only disable hardware filter vlans in promiscuous mode
4033 * if SR-IOV and VMDQ are disabled - otherwise ensure
4034 * that hardware VLAN filters remain enabled.
4035 */
4036 if (adapter->flags & (IXGBE_FLAG_VMDQ_ENABLED |
4037 IXGBE_FLAG_SRIOV_ENABLED))
4038 vlnctrl |= (IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
4039 } else {
4040 if (netdev->flags & IFF_ALLMULTI) {
4041 fctrl |= IXGBE_FCTRL_MPE;
4042 vmolr |= IXGBE_VMOLR_MPE;
4043 }
4044 vlnctrl |= IXGBE_VLNCTRL_VFE;
4045 hw->addr_ctrl.user_set_promisc = false;
4046 }
4047
4048 /*
4049 * Write addresses to available RAR registers, if there is not
4050 * sufficient space to store all the addresses then enable
4051 * unicast promiscuous mode
4052 */
4053 count = ixgbe_write_uc_addr_list(netdev, VMDQ_P(0));
4054 if (count < 0) {
4055 fctrl |= IXGBE_FCTRL_UPE;
4056 vmolr |= IXGBE_VMOLR_ROPE;
4057 }
4058
4059 /* Write addresses to the MTA, if the attempt fails
4060 * then we should just turn on promiscuous mode so
4061 * that we can at least receive multicast traffic
4062 */
4063 count = ixgbe_write_mc_addr_list(netdev);
4064 if (count < 0) {
4065 fctrl |= IXGBE_FCTRL_MPE;
4066 vmolr |= IXGBE_VMOLR_MPE;
4067 } else if (count) {
4068 vmolr |= IXGBE_VMOLR_ROMPE;
4069 }
4070
4071 if (hw->mac.type != ixgbe_mac_82598EB) {
4072 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(VMDQ_P(0))) &
4073 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
4074 IXGBE_VMOLR_ROPE);
4075 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(VMDQ_P(0)), vmolr);
4076 }
4077
4078 /* This is useful for sniffing bad packets. */
4079 if (adapter->netdev->features & NETIF_F_RXALL) {
4080 /* UPE and MPE will be handled by normal PROMISC logic
4081 * in e1000e_set_rx_mode */
4082 fctrl |= (IXGBE_FCTRL_SBP | /* Receive bad packets */
4083 IXGBE_FCTRL_BAM | /* RX All Bcast Pkts */
4084 IXGBE_FCTRL_PMCF); /* RX All MAC Ctrl Pkts */
4085
4086 fctrl &= ~(IXGBE_FCTRL_DPF);
4087 /* NOTE: VLAN filtering is disabled by setting PROMISC */
4088 }
4089
4090 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
4091 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
4092
4093 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
4094 ixgbe_vlan_strip_enable(adapter);
4095 else
4096 ixgbe_vlan_strip_disable(adapter);
4097 }
4098
4099 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
4100 {
4101 int q_idx;
4102
4103 for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) {
4104 ixgbe_qv_init_lock(adapter->q_vector[q_idx]);
4105 napi_enable(&adapter->q_vector[q_idx]->napi);
4106 }
4107 }
4108
4109 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
4110 {
4111 int q_idx;
4112
4113 for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) {
4114 napi_disable(&adapter->q_vector[q_idx]->napi);
4115 while (!ixgbe_qv_disable(adapter->q_vector[q_idx])) {
4116 pr_info("QV %d locked\n", q_idx);
4117 usleep_range(1000, 20000);
4118 }
4119 }
4120 }
4121
4122 #ifdef CONFIG_IXGBE_DCB
4123 /**
4124 * ixgbe_configure_dcb - Configure DCB hardware
4125 * @adapter: ixgbe adapter struct
4126 *
4127 * This is called by the driver on open to configure the DCB hardware.
4128 * This is also called by the gennetlink interface when reconfiguring
4129 * the DCB state.
4130 */
4131 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
4132 {
4133 struct ixgbe_hw *hw = &adapter->hw;
4134 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
4135
4136 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
4137 if (hw->mac.type == ixgbe_mac_82598EB)
4138 netif_set_gso_max_size(adapter->netdev, 65536);
4139 return;
4140 }
4141
4142 if (hw->mac.type == ixgbe_mac_82598EB)
4143 netif_set_gso_max_size(adapter->netdev, 32768);
4144
4145 #ifdef IXGBE_FCOE
4146 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
4147 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
4148 #endif
4149
4150 /* reconfigure the hardware */
4151 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE) {
4152 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
4153 DCB_TX_CONFIG);
4154 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
4155 DCB_RX_CONFIG);
4156 ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
4157 } else if (adapter->ixgbe_ieee_ets && adapter->ixgbe_ieee_pfc) {
4158 ixgbe_dcb_hw_ets(&adapter->hw,
4159 adapter->ixgbe_ieee_ets,
4160 max_frame);
4161 ixgbe_dcb_hw_pfc_config(&adapter->hw,
4162 adapter->ixgbe_ieee_pfc->pfc_en,
4163 adapter->ixgbe_ieee_ets->prio_tc);
4164 }
4165
4166 /* Enable RSS Hash per TC */
4167 if (hw->mac.type != ixgbe_mac_82598EB) {
4168 u32 msb = 0;
4169 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices - 1;
4170
4171 while (rss_i) {
4172 msb++;
4173 rss_i >>= 1;
4174 }
4175
4176 /* write msb to all 8 TCs in one write */
4177 IXGBE_WRITE_REG(hw, IXGBE_RQTC, msb * 0x11111111);
4178 }
4179 }
4180 #endif
4181
4182 /* Additional bittime to account for IXGBE framing */
4183 #define IXGBE_ETH_FRAMING 20
4184
4185 /**
4186 * ixgbe_hpbthresh - calculate high water mark for flow control
4187 *
4188 * @adapter: board private structure to calculate for
4189 * @pb: packet buffer to calculate
4190 */
4191 static int ixgbe_hpbthresh(struct ixgbe_adapter *adapter, int pb)
4192 {
4193 struct ixgbe_hw *hw = &adapter->hw;
4194 struct net_device *dev = adapter->netdev;
4195 int link, tc, kb, marker;
4196 u32 dv_id, rx_pba;
4197
4198 /* Calculate max LAN frame size */
4199 tc = link = dev->mtu + ETH_HLEN + ETH_FCS_LEN + IXGBE_ETH_FRAMING;
4200
4201 #ifdef IXGBE_FCOE
4202 /* FCoE traffic class uses FCOE jumbo frames */
4203 if ((dev->features & NETIF_F_FCOE_MTU) &&
4204 (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
4205 (pb == ixgbe_fcoe_get_tc(adapter)))
4206 tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
4207 #endif
4208
4209 /* Calculate delay value for device */
4210 switch (hw->mac.type) {
4211 case ixgbe_mac_X540:
4212 case ixgbe_mac_X550:
4213 case ixgbe_mac_X550EM_x:
4214 dv_id = IXGBE_DV_X540(link, tc);
4215 break;
4216 default:
4217 dv_id = IXGBE_DV(link, tc);
4218 break;
4219 }
4220
4221 /* Loopback switch introduces additional latency */
4222 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4223 dv_id += IXGBE_B2BT(tc);
4224
4225 /* Delay value is calculated in bit times convert to KB */
4226 kb = IXGBE_BT2KB(dv_id);
4227 rx_pba = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(pb)) >> 10;
4228
4229 marker = rx_pba - kb;
4230
4231 /* It is possible that the packet buffer is not large enough
4232 * to provide required headroom. In this case throw an error
4233 * to user and a do the best we can.
4234 */
4235 if (marker < 0) {
4236 e_warn(drv, "Packet Buffer(%i) can not provide enough"
4237 "headroom to support flow control."
4238 "Decrease MTU or number of traffic classes\n", pb);
4239 marker = tc + 1;
4240 }
4241
4242 return marker;
4243 }
4244
4245 /**
4246 * ixgbe_lpbthresh - calculate low water mark for for flow control
4247 *
4248 * @adapter: board private structure to calculate for
4249 * @pb: packet buffer to calculate
4250 */
4251 static int ixgbe_lpbthresh(struct ixgbe_adapter *adapter, int pb)
4252 {
4253 struct ixgbe_hw *hw = &adapter->hw;
4254 struct net_device *dev = adapter->netdev;
4255 int tc;
4256 u32 dv_id;
4257
4258 /* Calculate max LAN frame size */
4259 tc = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
4260
4261 #ifdef IXGBE_FCOE
4262 /* FCoE traffic class uses FCOE jumbo frames */
4263 if ((dev->features & NETIF_F_FCOE_MTU) &&
4264 (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
4265 (pb == netdev_get_prio_tc_map(dev, adapter->fcoe.up)))
4266 tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
4267 #endif
4268
4269 /* Calculate delay value for device */
4270 switch (hw->mac.type) {
4271 case ixgbe_mac_X540:
4272 case ixgbe_mac_X550:
4273 case ixgbe_mac_X550EM_x:
4274 dv_id = IXGBE_LOW_DV_X540(tc);
4275 break;
4276 default:
4277 dv_id = IXGBE_LOW_DV(tc);
4278 break;
4279 }
4280
4281 /* Delay value is calculated in bit times convert to KB */
4282 return IXGBE_BT2KB(dv_id);
4283 }
4284
4285 /*
4286 * ixgbe_pbthresh_setup - calculate and setup high low water marks
4287 */
4288 static void ixgbe_pbthresh_setup(struct ixgbe_adapter *adapter)
4289 {
4290 struct ixgbe_hw *hw = &adapter->hw;
4291 int num_tc = netdev_get_num_tc(adapter->netdev);
4292 int i;
4293
4294 if (!num_tc)
4295 num_tc = 1;
4296
4297 for (i = 0; i < num_tc; i++) {
4298 hw->fc.high_water[i] = ixgbe_hpbthresh(adapter, i);
4299 hw->fc.low_water[i] = ixgbe_lpbthresh(adapter, i);
4300
4301 /* Low water marks must not be larger than high water marks */
4302 if (hw->fc.low_water[i] > hw->fc.high_water[i])
4303 hw->fc.low_water[i] = 0;
4304 }
4305
4306 for (; i < MAX_TRAFFIC_CLASS; i++)
4307 hw->fc.high_water[i] = 0;
4308 }
4309
4310 static void ixgbe_configure_pb(struct ixgbe_adapter *adapter)
4311 {
4312 struct ixgbe_hw *hw = &adapter->hw;
4313 int hdrm;
4314 u8 tc = netdev_get_num_tc(adapter->netdev);
4315
4316 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
4317 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
4318 hdrm = 32 << adapter->fdir_pballoc;
4319 else
4320 hdrm = 0;
4321
4322 hw->mac.ops.set_rxpba(hw, tc, hdrm, PBA_STRATEGY_EQUAL);
4323 ixgbe_pbthresh_setup(adapter);
4324 }
4325
4326 static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
4327 {
4328 struct ixgbe_hw *hw = &adapter->hw;
4329 struct hlist_node *node2;
4330 struct ixgbe_fdir_filter *filter;
4331
4332 spin_lock(&adapter->fdir_perfect_lock);
4333
4334 if (!hlist_empty(&adapter->fdir_filter_list))
4335 ixgbe_fdir_set_input_mask_82599(hw, &adapter->fdir_mask);
4336
4337 hlist_for_each_entry_safe(filter, node2,
4338 &adapter->fdir_filter_list, fdir_node) {
4339 ixgbe_fdir_write_perfect_filter_82599(hw,
4340 &filter->filter,
4341 filter->sw_idx,
4342 (filter->action == IXGBE_FDIR_DROP_QUEUE) ?
4343 IXGBE_FDIR_DROP_QUEUE :
4344 adapter->rx_ring[filter->action]->reg_idx);
4345 }
4346
4347 spin_unlock(&adapter->fdir_perfect_lock);
4348 }
4349
4350 static void ixgbe_macvlan_set_rx_mode(struct net_device *dev, unsigned int pool,
4351 struct ixgbe_adapter *adapter)
4352 {
4353 struct ixgbe_hw *hw = &adapter->hw;
4354 u32 vmolr;
4355
4356 /* No unicast promiscuous support for VMDQ devices. */
4357 vmolr = IXGBE_READ_REG(hw, IXGBE_VMOLR(pool));
4358 vmolr |= (IXGBE_VMOLR_ROMPE | IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE);
4359
4360 /* clear the affected bit */
4361 vmolr &= ~IXGBE_VMOLR_MPE;
4362
4363 if (dev->flags & IFF_ALLMULTI) {
4364 vmolr |= IXGBE_VMOLR_MPE;
4365 } else {
4366 vmolr |= IXGBE_VMOLR_ROMPE;
4367 hw->mac.ops.update_mc_addr_list(hw, dev);
4368 }
4369 ixgbe_write_uc_addr_list(adapter->netdev, pool);
4370 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(pool), vmolr);
4371 }
4372
4373 static void ixgbe_fwd_psrtype(struct ixgbe_fwd_adapter *vadapter)
4374 {
4375 struct ixgbe_adapter *adapter = vadapter->real_adapter;
4376 int rss_i = adapter->num_rx_queues_per_pool;
4377 struct ixgbe_hw *hw = &adapter->hw;
4378 u16 pool = vadapter->pool;
4379 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
4380 IXGBE_PSRTYPE_UDPHDR |
4381 IXGBE_PSRTYPE_IPV4HDR |
4382 IXGBE_PSRTYPE_L2HDR |
4383 IXGBE_PSRTYPE_IPV6HDR;
4384
4385 if (hw->mac.type == ixgbe_mac_82598EB)
4386 return;
4387
4388 if (rss_i > 3)
4389 psrtype |= 2 << 29;
4390 else if (rss_i > 1)
4391 psrtype |= 1 << 29;
4392
4393 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(VMDQ_P(pool)), psrtype);
4394 }
4395
4396 /**
4397 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
4398 * @rx_ring: ring to free buffers from
4399 **/
4400 static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring)
4401 {
4402 struct device *dev = rx_ring->dev;
4403 unsigned long size;
4404 u16 i;
4405
4406 /* ring already cleared, nothing to do */
4407 if (!rx_ring->rx_buffer_info)
4408 return;
4409
4410 /* Free all the Rx ring sk_buffs */
4411 for (i = 0; i < rx_ring->count; i++) {
4412 struct ixgbe_rx_buffer *rx_buffer = &rx_ring->rx_buffer_info[i];
4413
4414 if (rx_buffer->skb) {
4415 struct sk_buff *skb = rx_buffer->skb;
4416 if (IXGBE_CB(skb)->page_released)
4417 dma_unmap_page(dev,
4418 IXGBE_CB(skb)->dma,
4419 ixgbe_rx_bufsz(rx_ring),
4420 DMA_FROM_DEVICE);
4421 dev_kfree_skb(skb);
4422 rx_buffer->skb = NULL;
4423 }
4424
4425 if (!rx_buffer->page)
4426 continue;
4427
4428 dma_unmap_page(dev, rx_buffer->dma,
4429 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
4430 __free_pages(rx_buffer->page, ixgbe_rx_pg_order(rx_ring));
4431
4432 rx_buffer->page = NULL;
4433 }
4434
4435 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4436 memset(rx_ring->rx_buffer_info, 0, size);
4437
4438 /* Zero out the descriptor ring */
4439 memset(rx_ring->desc, 0, rx_ring->size);
4440
4441 rx_ring->next_to_alloc = 0;
4442 rx_ring->next_to_clean = 0;
4443 rx_ring->next_to_use = 0;
4444 }
4445
4446 static void ixgbe_disable_fwd_ring(struct ixgbe_fwd_adapter *vadapter,
4447 struct ixgbe_ring *rx_ring)
4448 {
4449 struct ixgbe_adapter *adapter = vadapter->real_adapter;
4450 int index = rx_ring->queue_index + vadapter->rx_base_queue;
4451
4452 /* shutdown specific queue receive and wait for dma to settle */
4453 ixgbe_disable_rx_queue(adapter, rx_ring);
4454 usleep_range(10000, 20000);
4455 ixgbe_irq_disable_queues(adapter, ((u64)1 << index));
4456 ixgbe_clean_rx_ring(rx_ring);
4457 rx_ring->l2_accel_priv = NULL;
4458 }
4459
4460 static int ixgbe_fwd_ring_down(struct net_device *vdev,
4461 struct ixgbe_fwd_adapter *accel)
4462 {
4463 struct ixgbe_adapter *adapter = accel->real_adapter;
4464 unsigned int rxbase = accel->rx_base_queue;
4465 unsigned int txbase = accel->tx_base_queue;
4466 int i;
4467
4468 netif_tx_stop_all_queues(vdev);
4469
4470 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4471 ixgbe_disable_fwd_ring(accel, adapter->rx_ring[rxbase + i]);
4472 adapter->rx_ring[rxbase + i]->netdev = adapter->netdev;
4473 }
4474
4475 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4476 adapter->tx_ring[txbase + i]->l2_accel_priv = NULL;
4477 adapter->tx_ring[txbase + i]->netdev = adapter->netdev;
4478 }
4479
4480
4481 return 0;
4482 }
4483
4484 static int ixgbe_fwd_ring_up(struct net_device *vdev,
4485 struct ixgbe_fwd_adapter *accel)
4486 {
4487 struct ixgbe_adapter *adapter = accel->real_adapter;
4488 unsigned int rxbase, txbase, queues;
4489 int i, baseq, err = 0;
4490
4491 if (!test_bit(accel->pool, &adapter->fwd_bitmask))
4492 return 0;
4493
4494 baseq = accel->pool * adapter->num_rx_queues_per_pool;
4495 netdev_dbg(vdev, "pool %i:%i queues %i:%i VSI bitmask %lx\n",
4496 accel->pool, adapter->num_rx_pools,
4497 baseq, baseq + adapter->num_rx_queues_per_pool,
4498 adapter->fwd_bitmask);
4499
4500 accel->netdev = vdev;
4501 accel->rx_base_queue = rxbase = baseq;
4502 accel->tx_base_queue = txbase = baseq;
4503
4504 for (i = 0; i < adapter->num_rx_queues_per_pool; i++)
4505 ixgbe_disable_fwd_ring(accel, adapter->rx_ring[rxbase + i]);
4506
4507 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4508 adapter->rx_ring[rxbase + i]->netdev = vdev;
4509 adapter->rx_ring[rxbase + i]->l2_accel_priv = accel;
4510 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[rxbase + i]);
4511 }
4512
4513 for (i = 0; i < adapter->num_rx_queues_per_pool; i++) {
4514 adapter->tx_ring[txbase + i]->netdev = vdev;
4515 adapter->tx_ring[txbase + i]->l2_accel_priv = accel;
4516 }
4517
4518 queues = min_t(unsigned int,
4519 adapter->num_rx_queues_per_pool, vdev->num_tx_queues);
4520 err = netif_set_real_num_tx_queues(vdev, queues);
4521 if (err)
4522 goto fwd_queue_err;
4523
4524 err = netif_set_real_num_rx_queues(vdev, queues);
4525 if (err)
4526 goto fwd_queue_err;
4527
4528 if (is_valid_ether_addr(vdev->dev_addr))
4529 ixgbe_add_mac_filter(adapter, vdev->dev_addr, accel->pool);
4530
4531 ixgbe_fwd_psrtype(accel);
4532 ixgbe_macvlan_set_rx_mode(vdev, accel->pool, adapter);
4533 return err;
4534 fwd_queue_err:
4535 ixgbe_fwd_ring_down(vdev, accel);
4536 return err;
4537 }
4538
4539 static void ixgbe_configure_dfwd(struct ixgbe_adapter *adapter)
4540 {
4541 struct net_device *upper;
4542 struct list_head *iter;
4543 int err;
4544
4545 netdev_for_each_all_upper_dev_rcu(adapter->netdev, upper, iter) {
4546 if (netif_is_macvlan(upper)) {
4547 struct macvlan_dev *dfwd = netdev_priv(upper);
4548 struct ixgbe_fwd_adapter *vadapter = dfwd->fwd_priv;
4549
4550 if (dfwd->fwd_priv) {
4551 err = ixgbe_fwd_ring_up(upper, vadapter);
4552 if (err)
4553 continue;
4554 }
4555 }
4556 }
4557 }
4558
4559 static void ixgbe_configure(struct ixgbe_adapter *adapter)
4560 {
4561 struct ixgbe_hw *hw = &adapter->hw;
4562
4563 ixgbe_configure_pb(adapter);
4564 #ifdef CONFIG_IXGBE_DCB
4565 ixgbe_configure_dcb(adapter);
4566 #endif
4567 /*
4568 * We must restore virtualization before VLANs or else
4569 * the VLVF registers will not be populated
4570 */
4571 ixgbe_configure_virtualization(adapter);
4572
4573 ixgbe_set_rx_mode(adapter->netdev);
4574 ixgbe_restore_vlan(adapter);
4575
4576 switch (hw->mac.type) {
4577 case ixgbe_mac_82599EB:
4578 case ixgbe_mac_X540:
4579 hw->mac.ops.disable_rx_buff(hw);
4580 break;
4581 default:
4582 break;
4583 }
4584
4585 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
4586 ixgbe_init_fdir_signature_82599(&adapter->hw,
4587 adapter->fdir_pballoc);
4588 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
4589 ixgbe_init_fdir_perfect_82599(&adapter->hw,
4590 adapter->fdir_pballoc);
4591 ixgbe_fdir_filter_restore(adapter);
4592 }
4593
4594 switch (hw->mac.type) {
4595 case ixgbe_mac_82599EB:
4596 case ixgbe_mac_X540:
4597 hw->mac.ops.enable_rx_buff(hw);
4598 break;
4599 default:
4600 break;
4601 }
4602
4603 #ifdef IXGBE_FCOE
4604 /* configure FCoE L2 filters, redirection table, and Rx control */
4605 ixgbe_configure_fcoe(adapter);
4606
4607 #endif /* IXGBE_FCOE */
4608 ixgbe_configure_tx(adapter);
4609 ixgbe_configure_rx(adapter);
4610 ixgbe_configure_dfwd(adapter);
4611 }
4612
4613 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
4614 {
4615 switch (hw->phy.type) {
4616 case ixgbe_phy_sfp_avago:
4617 case ixgbe_phy_sfp_ftl:
4618 case ixgbe_phy_sfp_intel:
4619 case ixgbe_phy_sfp_unknown:
4620 case ixgbe_phy_sfp_passive_tyco:
4621 case ixgbe_phy_sfp_passive_unknown:
4622 case ixgbe_phy_sfp_active_unknown:
4623 case ixgbe_phy_sfp_ftl_active:
4624 case ixgbe_phy_qsfp_passive_unknown:
4625 case ixgbe_phy_qsfp_active_unknown:
4626 case ixgbe_phy_qsfp_intel:
4627 case ixgbe_phy_qsfp_unknown:
4628 /* ixgbe_phy_none is set when no SFP module is present */
4629 case ixgbe_phy_none:
4630 return true;
4631 case ixgbe_phy_nl:
4632 if (hw->mac.type == ixgbe_mac_82598EB)
4633 return true;
4634 default:
4635 return false;
4636 }
4637 }
4638
4639 /**
4640 * ixgbe_sfp_link_config - set up SFP+ link
4641 * @adapter: pointer to private adapter struct
4642 **/
4643 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
4644 {
4645 /*
4646 * We are assuming the worst case scenario here, and that
4647 * is that an SFP was inserted/removed after the reset
4648 * but before SFP detection was enabled. As such the best
4649 * solution is to just start searching as soon as we start
4650 */
4651 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
4652 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
4653
4654 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
4655 }
4656
4657 /**
4658 * ixgbe_non_sfp_link_config - set up non-SFP+ link
4659 * @hw: pointer to private hardware struct
4660 *
4661 * Returns 0 on success, negative on failure
4662 **/
4663 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
4664 {
4665 u32 speed;
4666 bool autoneg, link_up = false;
4667 u32 ret = IXGBE_ERR_LINK_SETUP;
4668
4669 if (hw->mac.ops.check_link)
4670 ret = hw->mac.ops.check_link(hw, &speed, &link_up, false);
4671
4672 if (ret)
4673 return ret;
4674
4675 speed = hw->phy.autoneg_advertised;
4676 if ((!speed) && (hw->mac.ops.get_link_capabilities))
4677 ret = hw->mac.ops.get_link_capabilities(hw, &speed,
4678 &autoneg);
4679 if (ret)
4680 return ret;
4681
4682 if (hw->mac.ops.setup_link)
4683 ret = hw->mac.ops.setup_link(hw, speed, link_up);
4684
4685 return ret;
4686 }
4687
4688 static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
4689 {
4690 struct ixgbe_hw *hw = &adapter->hw;
4691 u32 gpie = 0;
4692
4693 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4694 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
4695 IXGBE_GPIE_OCD;
4696 gpie |= IXGBE_GPIE_EIAME;
4697 /*
4698 * use EIAM to auto-mask when MSI-X interrupt is asserted
4699 * this saves a register write for every interrupt
4700 */
4701 switch (hw->mac.type) {
4702 case ixgbe_mac_82598EB:
4703 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
4704 break;
4705 case ixgbe_mac_82599EB:
4706 case ixgbe_mac_X540:
4707 case ixgbe_mac_X550:
4708 case ixgbe_mac_X550EM_x:
4709 default:
4710 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
4711 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
4712 break;
4713 }
4714 } else {
4715 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
4716 * specifically only auto mask tx and rx interrupts */
4717 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
4718 }
4719
4720 /* XXX: to interrupt immediately for EICS writes, enable this */
4721 /* gpie |= IXGBE_GPIE_EIMEN; */
4722
4723 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
4724 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
4725
4726 switch (adapter->ring_feature[RING_F_VMDQ].mask) {
4727 case IXGBE_82599_VMDQ_8Q_MASK:
4728 gpie |= IXGBE_GPIE_VTMODE_16;
4729 break;
4730 case IXGBE_82599_VMDQ_4Q_MASK:
4731 gpie |= IXGBE_GPIE_VTMODE_32;
4732 break;
4733 default:
4734 gpie |= IXGBE_GPIE_VTMODE_64;
4735 break;
4736 }
4737 }
4738
4739 /* Enable Thermal over heat sensor interrupt */
4740 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
4741 switch (adapter->hw.mac.type) {
4742 case ixgbe_mac_82599EB:
4743 gpie |= IXGBE_SDP0_GPIEN;
4744 break;
4745 case ixgbe_mac_X540:
4746 gpie |= IXGBE_EIMS_TS;
4747 break;
4748 default:
4749 break;
4750 }
4751 }
4752
4753 /* Enable fan failure interrupt */
4754 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
4755 gpie |= IXGBE_SDP1_GPIEN;
4756
4757 if (hw->mac.type == ixgbe_mac_82599EB) {
4758 gpie |= IXGBE_SDP1_GPIEN;
4759 gpie |= IXGBE_SDP2_GPIEN;
4760 }
4761
4762 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
4763 }
4764
4765 static void ixgbe_up_complete(struct ixgbe_adapter *adapter)
4766 {
4767 struct ixgbe_hw *hw = &adapter->hw;
4768 int err;
4769 u32 ctrl_ext;
4770
4771 ixgbe_get_hw_control(adapter);
4772 ixgbe_setup_gpie(adapter);
4773
4774 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4775 ixgbe_configure_msix(adapter);
4776 else
4777 ixgbe_configure_msi_and_legacy(adapter);
4778
4779 /* enable the optics for 82599 SFP+ fiber */
4780 if (hw->mac.ops.enable_tx_laser)
4781 hw->mac.ops.enable_tx_laser(hw);
4782
4783 smp_mb__before_atomic();
4784 clear_bit(__IXGBE_DOWN, &adapter->state);
4785 ixgbe_napi_enable_all(adapter);
4786
4787 if (ixgbe_is_sfp(hw)) {
4788 ixgbe_sfp_link_config(adapter);
4789 } else {
4790 err = ixgbe_non_sfp_link_config(hw);
4791 if (err)
4792 e_err(probe, "link_config FAILED %d\n", err);
4793 }
4794
4795 /* clear any pending interrupts, may auto mask */
4796 IXGBE_READ_REG(hw, IXGBE_EICR);
4797 ixgbe_irq_enable(adapter, true, true);
4798
4799 /*
4800 * If this adapter has a fan, check to see if we had a failure
4801 * before we enabled the interrupt.
4802 */
4803 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
4804 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
4805 if (esdp & IXGBE_ESDP_SDP1)
4806 e_crit(drv, "Fan has stopped, replace the adapter\n");
4807 }
4808
4809 /* bring the link up in the watchdog, this could race with our first
4810 * link up interrupt but shouldn't be a problem */
4811 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
4812 adapter->link_check_timeout = jiffies;
4813 mod_timer(&adapter->service_timer, jiffies);
4814
4815 /* Set PF Reset Done bit so PF/VF Mail Ops can work */
4816 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
4817 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
4818 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
4819 }
4820
4821 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
4822 {
4823 WARN_ON(in_interrupt());
4824 /* put off any impending NetWatchDogTimeout */
4825 adapter->netdev->trans_start = jiffies;
4826
4827 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
4828 usleep_range(1000, 2000);
4829 ixgbe_down(adapter);
4830 /*
4831 * If SR-IOV enabled then wait a bit before bringing the adapter
4832 * back up to give the VFs time to respond to the reset. The
4833 * two second wait is based upon the watchdog timer cycle in
4834 * the VF driver.
4835 */
4836 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4837 msleep(2000);
4838 ixgbe_up(adapter);
4839 clear_bit(__IXGBE_RESETTING, &adapter->state);
4840 }
4841
4842 void ixgbe_up(struct ixgbe_adapter *adapter)
4843 {
4844 /* hardware has been reset, we need to reload some things */
4845 ixgbe_configure(adapter);
4846
4847 ixgbe_up_complete(adapter);
4848 }
4849
4850 void ixgbe_reset(struct ixgbe_adapter *adapter)
4851 {
4852 struct ixgbe_hw *hw = &adapter->hw;
4853 struct net_device *netdev = adapter->netdev;
4854 int err;
4855 u8 old_addr[ETH_ALEN];
4856
4857 if (ixgbe_removed(hw->hw_addr))
4858 return;
4859 /* lock SFP init bit to prevent race conditions with the watchdog */
4860 while (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
4861 usleep_range(1000, 2000);
4862
4863 /* clear all SFP and link config related flags while holding SFP_INIT */
4864 adapter->flags2 &= ~(IXGBE_FLAG2_SEARCH_FOR_SFP |
4865 IXGBE_FLAG2_SFP_NEEDS_RESET);
4866 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
4867
4868 err = hw->mac.ops.init_hw(hw);
4869 switch (err) {
4870 case 0:
4871 case IXGBE_ERR_SFP_NOT_PRESENT:
4872 case IXGBE_ERR_SFP_NOT_SUPPORTED:
4873 break;
4874 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
4875 e_dev_err("master disable timed out\n");
4876 break;
4877 case IXGBE_ERR_EEPROM_VERSION:
4878 /* We are running on a pre-production device, log a warning */
4879 e_dev_warn("This device is a pre-production adapter/LOM. "
4880 "Please be aware there may be issues associated with "
4881 "your hardware. If you are experiencing problems "
4882 "please contact your Intel or hardware "
4883 "representative who provided you with this "
4884 "hardware.\n");
4885 break;
4886 default:
4887 e_dev_err("Hardware Error: %d\n", err);
4888 }
4889
4890 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
4891 /* do not flush user set addresses */
4892 memcpy(old_addr, &adapter->mac_table[0].addr, netdev->addr_len);
4893 ixgbe_flush_sw_mac_table(adapter);
4894 ixgbe_mac_set_default_filter(adapter, old_addr);
4895
4896 /* update SAN MAC vmdq pool selection */
4897 if (hw->mac.san_mac_rar_index)
4898 hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));
4899
4900 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
4901 ixgbe_ptp_reset(adapter);
4902 }
4903
4904 /**
4905 * ixgbe_clean_tx_ring - Free Tx Buffers
4906 * @tx_ring: ring to be cleaned
4907 **/
4908 static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
4909 {
4910 struct ixgbe_tx_buffer *tx_buffer_info;
4911 unsigned long size;
4912 u16 i;
4913
4914 /* ring already cleared, nothing to do */
4915 if (!tx_ring->tx_buffer_info)
4916 return;
4917
4918 /* Free all the Tx ring sk_buffs */
4919 for (i = 0; i < tx_ring->count; i++) {
4920 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4921 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
4922 }
4923
4924 netdev_tx_reset_queue(txring_txq(tx_ring));
4925
4926 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
4927 memset(tx_ring->tx_buffer_info, 0, size);
4928
4929 /* Zero out the descriptor ring */
4930 memset(tx_ring->desc, 0, tx_ring->size);
4931
4932 tx_ring->next_to_use = 0;
4933 tx_ring->next_to_clean = 0;
4934 }
4935
4936 /**
4937 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
4938 * @adapter: board private structure
4939 **/
4940 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
4941 {
4942 int i;
4943
4944 for (i = 0; i < adapter->num_rx_queues; i++)
4945 ixgbe_clean_rx_ring(adapter->rx_ring[i]);
4946 }
4947
4948 /**
4949 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
4950 * @adapter: board private structure
4951 **/
4952 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
4953 {
4954 int i;
4955
4956 for (i = 0; i < adapter->num_tx_queues; i++)
4957 ixgbe_clean_tx_ring(adapter->tx_ring[i]);
4958 }
4959
4960 static void ixgbe_fdir_filter_exit(struct ixgbe_adapter *adapter)
4961 {
4962 struct hlist_node *node2;
4963 struct ixgbe_fdir_filter *filter;
4964
4965 spin_lock(&adapter->fdir_perfect_lock);
4966
4967 hlist_for_each_entry_safe(filter, node2,
4968 &adapter->fdir_filter_list, fdir_node) {
4969 hlist_del(&filter->fdir_node);
4970 kfree(filter);
4971 }
4972 adapter->fdir_filter_count = 0;
4973
4974 spin_unlock(&adapter->fdir_perfect_lock);
4975 }
4976
4977 void ixgbe_down(struct ixgbe_adapter *adapter)
4978 {
4979 struct net_device *netdev = adapter->netdev;
4980 struct ixgbe_hw *hw = &adapter->hw;
4981 struct net_device *upper;
4982 struct list_head *iter;
4983 u32 rxctrl;
4984 int i;
4985
4986 /* signal that we are down to the interrupt handler */
4987 if (test_and_set_bit(__IXGBE_DOWN, &adapter->state))
4988 return; /* do nothing if already down */
4989
4990 /* disable receives */
4991 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
4992 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
4993
4994 /* disable all enabled rx queues */
4995 for (i = 0; i < adapter->num_rx_queues; i++)
4996 /* this call also flushes the previous write */
4997 ixgbe_disable_rx_queue(adapter, adapter->rx_ring[i]);
4998
4999 usleep_range(10000, 20000);
5000
5001 netif_tx_stop_all_queues(netdev);
5002
5003 /* call carrier off first to avoid false dev_watchdog timeouts */
5004 netif_carrier_off(netdev);
5005 netif_tx_disable(netdev);
5006
5007 /* disable any upper devices */
5008 netdev_for_each_all_upper_dev_rcu(adapter->netdev, upper, iter) {
5009 if (netif_is_macvlan(upper)) {
5010 struct macvlan_dev *vlan = netdev_priv(upper);
5011
5012 if (vlan->fwd_priv) {
5013 netif_tx_stop_all_queues(upper);
5014 netif_carrier_off(upper);
5015 netif_tx_disable(upper);
5016 }
5017 }
5018 }
5019
5020 ixgbe_irq_disable(adapter);
5021
5022 ixgbe_napi_disable_all(adapter);
5023
5024 adapter->flags2 &= ~(IXGBE_FLAG2_FDIR_REQUIRES_REINIT |
5025 IXGBE_FLAG2_RESET_REQUESTED);
5026 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5027
5028 del_timer_sync(&adapter->service_timer);
5029
5030 if (adapter->num_vfs) {
5031 /* Clear EITR Select mapping */
5032 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
5033
5034 /* Mark all the VFs as inactive */
5035 for (i = 0 ; i < adapter->num_vfs; i++)
5036 adapter->vfinfo[i].clear_to_send = false;
5037
5038 /* ping all the active vfs to let them know we are going down */
5039 ixgbe_ping_all_vfs(adapter);
5040
5041 /* Disable all VFTE/VFRE TX/RX */
5042 ixgbe_disable_tx_rx(adapter);
5043 }
5044
5045 /* disable transmits in the hardware now that interrupts are off */
5046 for (i = 0; i < adapter->num_tx_queues; i++) {
5047 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
5048 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
5049 }
5050
5051 /* Disable the Tx DMA engine on 82599 and later MAC */
5052 switch (hw->mac.type) {
5053 case ixgbe_mac_82599EB:
5054 case ixgbe_mac_X540:
5055 case ixgbe_mac_X550:
5056 case ixgbe_mac_X550EM_x:
5057 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
5058 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
5059 ~IXGBE_DMATXCTL_TE));
5060 break;
5061 default:
5062 break;
5063 }
5064
5065 if (!pci_channel_offline(adapter->pdev))
5066 ixgbe_reset(adapter);
5067
5068 /* power down the optics for 82599 SFP+ fiber */
5069 if (hw->mac.ops.disable_tx_laser)
5070 hw->mac.ops.disable_tx_laser(hw);
5071
5072 ixgbe_clean_all_tx_rings(adapter);
5073 ixgbe_clean_all_rx_rings(adapter);
5074
5075 #ifdef CONFIG_IXGBE_DCA
5076 /* since we reset the hardware DCA settings were cleared */
5077 ixgbe_setup_dca(adapter);
5078 #endif
5079 }
5080
5081 /**
5082 * ixgbe_tx_timeout - Respond to a Tx Hang
5083 * @netdev: network interface device structure
5084 **/
5085 static void ixgbe_tx_timeout(struct net_device *netdev)
5086 {
5087 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5088
5089 /* Do the reset outside of interrupt context */
5090 ixgbe_tx_timeout_reset(adapter);
5091 }
5092
5093 /**
5094 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
5095 * @adapter: board private structure to initialize
5096 *
5097 * ixgbe_sw_init initializes the Adapter private data structure.
5098 * Fields are initialized based on PCI device information and
5099 * OS network device settings (MTU size).
5100 **/
5101 static int ixgbe_sw_init(struct ixgbe_adapter *adapter)
5102 {
5103 struct ixgbe_hw *hw = &adapter->hw;
5104 struct pci_dev *pdev = adapter->pdev;
5105 unsigned int rss, fdir;
5106 u32 fwsm;
5107 #ifdef CONFIG_IXGBE_DCB
5108 int j;
5109 struct tc_configuration *tc;
5110 #endif
5111
5112 /* PCI config space info */
5113
5114 hw->vendor_id = pdev->vendor;
5115 hw->device_id = pdev->device;
5116 hw->revision_id = pdev->revision;
5117 hw->subsystem_vendor_id = pdev->subsystem_vendor;
5118 hw->subsystem_device_id = pdev->subsystem_device;
5119
5120 /* Set common capability flags and settings */
5121 rss = min_t(int, ixgbe_max_rss_indices(adapter), num_online_cpus());
5122 adapter->ring_feature[RING_F_RSS].limit = rss;
5123 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
5124 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
5125 adapter->max_q_vectors = MAX_Q_VECTORS_82599;
5126 adapter->atr_sample_rate = 20;
5127 fdir = min_t(int, IXGBE_MAX_FDIR_INDICES, num_online_cpus());
5128 adapter->ring_feature[RING_F_FDIR].limit = fdir;
5129 adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_64K;
5130 #ifdef CONFIG_IXGBE_DCA
5131 adapter->flags |= IXGBE_FLAG_DCA_CAPABLE;
5132 #endif
5133 #ifdef IXGBE_FCOE
5134 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
5135 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
5136 #ifdef CONFIG_IXGBE_DCB
5137 /* Default traffic class to use for FCoE */
5138 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
5139 #endif /* CONFIG_IXGBE_DCB */
5140 #endif /* IXGBE_FCOE */
5141
5142 adapter->mac_table = kzalloc(sizeof(struct ixgbe_mac_addr) *
5143 hw->mac.num_rar_entries,
5144 GFP_ATOMIC);
5145
5146 /* Set MAC specific capability flags and exceptions */
5147 switch (hw->mac.type) {
5148 case ixgbe_mac_82598EB:
5149 adapter->flags2 &= ~IXGBE_FLAG2_RSC_CAPABLE;
5150 adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED;
5151
5152 if (hw->device_id == IXGBE_DEV_ID_82598AT)
5153 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
5154
5155 adapter->max_q_vectors = MAX_Q_VECTORS_82598;
5156 adapter->ring_feature[RING_F_FDIR].limit = 0;
5157 adapter->atr_sample_rate = 0;
5158 adapter->fdir_pballoc = 0;
5159 #ifdef IXGBE_FCOE
5160 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
5161 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
5162 #ifdef CONFIG_IXGBE_DCB
5163 adapter->fcoe.up = 0;
5164 #endif /* IXGBE_DCB */
5165 #endif /* IXGBE_FCOE */
5166 break;
5167 case ixgbe_mac_82599EB:
5168 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
5169 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
5170 break;
5171 case ixgbe_mac_X540:
5172 fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM);
5173 if (fwsm & IXGBE_FWSM_TS_ENABLED)
5174 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
5175 break;
5176 case ixgbe_mac_X550EM_x:
5177 case ixgbe_mac_X550:
5178 #ifdef CONFIG_IXGBE_DCA
5179 adapter->flags &= ~IXGBE_FLAG_DCA_CAPABLE;
5180 #endif
5181 break;
5182 default:
5183 break;
5184 }
5185
5186 #ifdef IXGBE_FCOE
5187 /* FCoE support exists, always init the FCoE lock */
5188 spin_lock_init(&adapter->fcoe.lock);
5189
5190 #endif
5191 /* n-tuple support exists, always init our spinlock */
5192 spin_lock_init(&adapter->fdir_perfect_lock);
5193
5194 #ifdef CONFIG_IXGBE_DCB
5195 switch (hw->mac.type) {
5196 case ixgbe_mac_X540:
5197 case ixgbe_mac_X550:
5198 case ixgbe_mac_X550EM_x:
5199 adapter->dcb_cfg.num_tcs.pg_tcs = X540_TRAFFIC_CLASS;
5200 adapter->dcb_cfg.num_tcs.pfc_tcs = X540_TRAFFIC_CLASS;
5201 break;
5202 default:
5203 adapter->dcb_cfg.num_tcs.pg_tcs = MAX_TRAFFIC_CLASS;
5204 adapter->dcb_cfg.num_tcs.pfc_tcs = MAX_TRAFFIC_CLASS;
5205 break;
5206 }
5207
5208 /* Configure DCB traffic classes */
5209 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
5210 tc = &adapter->dcb_cfg.tc_config[j];
5211 tc->path[DCB_TX_CONFIG].bwg_id = 0;
5212 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
5213 tc->path[DCB_RX_CONFIG].bwg_id = 0;
5214 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
5215 tc->dcb_pfc = pfc_disabled;
5216 }
5217
5218 /* Initialize default user to priority mapping, UPx->TC0 */
5219 tc = &adapter->dcb_cfg.tc_config[0];
5220 tc->path[DCB_TX_CONFIG].up_to_tc_bitmap = 0xFF;
5221 tc->path[DCB_RX_CONFIG].up_to_tc_bitmap = 0xFF;
5222
5223 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
5224 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
5225 adapter->dcb_cfg.pfc_mode_enable = false;
5226 adapter->dcb_set_bitmap = 0x00;
5227 adapter->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE;
5228 memcpy(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
5229 sizeof(adapter->temp_dcb_cfg));
5230
5231 #endif
5232
5233 /* default flow control settings */
5234 hw->fc.requested_mode = ixgbe_fc_full;
5235 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
5236 ixgbe_pbthresh_setup(adapter);
5237 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
5238 hw->fc.send_xon = true;
5239 hw->fc.disable_fc_autoneg = ixgbe_device_supports_autoneg_fc(hw);
5240
5241 #ifdef CONFIG_PCI_IOV
5242 if (max_vfs > 0)
5243 e_dev_warn("Enabling SR-IOV VFs using the max_vfs module parameter is deprecated - please use the pci sysfs interface instead.\n");
5244
5245 /* assign number of SR-IOV VFs */
5246 if (hw->mac.type != ixgbe_mac_82598EB) {
5247 if (max_vfs > IXGBE_MAX_VFS_DRV_LIMIT) {
5248 adapter->num_vfs = 0;
5249 e_dev_warn("max_vfs parameter out of range. Not assigning any SR-IOV VFs\n");
5250 } else {
5251 adapter->num_vfs = max_vfs;
5252 }
5253 }
5254 #endif /* CONFIG_PCI_IOV */
5255
5256 /* enable itr by default in dynamic mode */
5257 adapter->rx_itr_setting = 1;
5258 adapter->tx_itr_setting = 1;
5259
5260 /* set default ring sizes */
5261 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
5262 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
5263
5264 /* set default work limits */
5265 adapter->tx_work_limit = IXGBE_DEFAULT_TX_WORK;
5266
5267 /* initialize eeprom parameters */
5268 if (ixgbe_init_eeprom_params_generic(hw)) {
5269 e_dev_err("EEPROM initialization failed\n");
5270 return -EIO;
5271 }
5272
5273 /* PF holds first pool slot */
5274 set_bit(0, &adapter->fwd_bitmask);
5275 set_bit(__IXGBE_DOWN, &adapter->state);
5276
5277 return 0;
5278 }
5279
5280 /**
5281 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
5282 * @tx_ring: tx descriptor ring (for a specific queue) to setup
5283 *
5284 * Return 0 on success, negative on failure
5285 **/
5286 int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
5287 {
5288 struct device *dev = tx_ring->dev;
5289 int orig_node = dev_to_node(dev);
5290 int ring_node = -1;
5291 int size;
5292
5293 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
5294
5295 if (tx_ring->q_vector)
5296 ring_node = tx_ring->q_vector->numa_node;
5297
5298 tx_ring->tx_buffer_info = vzalloc_node(size, ring_node);
5299 if (!tx_ring->tx_buffer_info)
5300 tx_ring->tx_buffer_info = vzalloc(size);
5301 if (!tx_ring->tx_buffer_info)
5302 goto err;
5303
5304 u64_stats_init(&tx_ring->syncp);
5305
5306 /* round up to nearest 4K */
5307 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
5308 tx_ring->size = ALIGN(tx_ring->size, 4096);
5309
5310 set_dev_node(dev, ring_node);
5311 tx_ring->desc = dma_alloc_coherent(dev,
5312 tx_ring->size,
5313 &tx_ring->dma,
5314 GFP_KERNEL);
5315 set_dev_node(dev, orig_node);
5316 if (!tx_ring->desc)
5317 tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
5318 &tx_ring->dma, GFP_KERNEL);
5319 if (!tx_ring->desc)
5320 goto err;
5321
5322 tx_ring->next_to_use = 0;
5323 tx_ring->next_to_clean = 0;
5324 return 0;
5325
5326 err:
5327 vfree(tx_ring->tx_buffer_info);
5328 tx_ring->tx_buffer_info = NULL;
5329 dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n");
5330 return -ENOMEM;
5331 }
5332
5333 /**
5334 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
5335 * @adapter: board private structure
5336 *
5337 * If this function returns with an error, then it's possible one or
5338 * more of the rings is populated (while the rest are not). It is the
5339 * callers duty to clean those orphaned rings.
5340 *
5341 * Return 0 on success, negative on failure
5342 **/
5343 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
5344 {
5345 int i, err = 0;
5346
5347 for (i = 0; i < adapter->num_tx_queues; i++) {
5348 err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
5349 if (!err)
5350 continue;
5351
5352 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
5353 goto err_setup_tx;
5354 }
5355
5356 return 0;
5357 err_setup_tx:
5358 /* rewind the index freeing the rings as we go */
5359 while (i--)
5360 ixgbe_free_tx_resources(adapter->tx_ring[i]);
5361 return err;
5362 }
5363
5364 /**
5365 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
5366 * @rx_ring: rx descriptor ring (for a specific queue) to setup
5367 *
5368 * Returns 0 on success, negative on failure
5369 **/
5370 int ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring)
5371 {
5372 struct device *dev = rx_ring->dev;
5373 int orig_node = dev_to_node(dev);
5374 int ring_node = -1;
5375 int size;
5376
5377 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
5378
5379 if (rx_ring->q_vector)
5380 ring_node = rx_ring->q_vector->numa_node;
5381
5382 rx_ring->rx_buffer_info = vzalloc_node(size, ring_node);
5383 if (!rx_ring->rx_buffer_info)
5384 rx_ring->rx_buffer_info = vzalloc(size);
5385 if (!rx_ring->rx_buffer_info)
5386 goto err;
5387
5388 u64_stats_init(&rx_ring->syncp);
5389
5390 /* Round up to nearest 4K */
5391 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
5392 rx_ring->size = ALIGN(rx_ring->size, 4096);
5393
5394 set_dev_node(dev, ring_node);
5395 rx_ring->desc = dma_alloc_coherent(dev,
5396 rx_ring->size,
5397 &rx_ring->dma,
5398 GFP_KERNEL);
5399 set_dev_node(dev, orig_node);
5400 if (!rx_ring->desc)
5401 rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
5402 &rx_ring->dma, GFP_KERNEL);
5403 if (!rx_ring->desc)
5404 goto err;
5405
5406 rx_ring->next_to_clean = 0;
5407 rx_ring->next_to_use = 0;
5408
5409 return 0;
5410 err:
5411 vfree(rx_ring->rx_buffer_info);
5412 rx_ring->rx_buffer_info = NULL;
5413 dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");
5414 return -ENOMEM;
5415 }
5416
5417 /**
5418 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
5419 * @adapter: board private structure
5420 *
5421 * If this function returns with an error, then it's possible one or
5422 * more of the rings is populated (while the rest are not). It is the
5423 * callers duty to clean those orphaned rings.
5424 *
5425 * Return 0 on success, negative on failure
5426 **/
5427 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
5428 {
5429 int i, err = 0;
5430
5431 for (i = 0; i < adapter->num_rx_queues; i++) {
5432 err = ixgbe_setup_rx_resources(adapter->rx_ring[i]);
5433 if (!err)
5434 continue;
5435
5436 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
5437 goto err_setup_rx;
5438 }
5439
5440 #ifdef IXGBE_FCOE
5441 err = ixgbe_setup_fcoe_ddp_resources(adapter);
5442 if (!err)
5443 #endif
5444 return 0;
5445 err_setup_rx:
5446 /* rewind the index freeing the rings as we go */
5447 while (i--)
5448 ixgbe_free_rx_resources(adapter->rx_ring[i]);
5449 return err;
5450 }
5451
5452 /**
5453 * ixgbe_free_tx_resources - Free Tx Resources per Queue
5454 * @tx_ring: Tx descriptor ring for a specific queue
5455 *
5456 * Free all transmit software resources
5457 **/
5458 void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring)
5459 {
5460 ixgbe_clean_tx_ring(tx_ring);
5461
5462 vfree(tx_ring->tx_buffer_info);
5463 tx_ring->tx_buffer_info = NULL;
5464
5465 /* if not set, then don't free */
5466 if (!tx_ring->desc)
5467 return;
5468
5469 dma_free_coherent(tx_ring->dev, tx_ring->size,
5470 tx_ring->desc, tx_ring->dma);
5471
5472 tx_ring->desc = NULL;
5473 }
5474
5475 /**
5476 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
5477 * @adapter: board private structure
5478 *
5479 * Free all transmit software resources
5480 **/
5481 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
5482 {
5483 int i;
5484
5485 for (i = 0; i < adapter->num_tx_queues; i++)
5486 if (adapter->tx_ring[i]->desc)
5487 ixgbe_free_tx_resources(adapter->tx_ring[i]);
5488 }
5489
5490 /**
5491 * ixgbe_free_rx_resources - Free Rx Resources
5492 * @rx_ring: ring to clean the resources from
5493 *
5494 * Free all receive software resources
5495 **/
5496 void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring)
5497 {
5498 ixgbe_clean_rx_ring(rx_ring);
5499
5500 vfree(rx_ring->rx_buffer_info);
5501 rx_ring->rx_buffer_info = NULL;
5502
5503 /* if not set, then don't free */
5504 if (!rx_ring->desc)
5505 return;
5506
5507 dma_free_coherent(rx_ring->dev, rx_ring->size,
5508 rx_ring->desc, rx_ring->dma);
5509
5510 rx_ring->desc = NULL;
5511 }
5512
5513 /**
5514 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
5515 * @adapter: board private structure
5516 *
5517 * Free all receive software resources
5518 **/
5519 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
5520 {
5521 int i;
5522
5523 #ifdef IXGBE_FCOE
5524 ixgbe_free_fcoe_ddp_resources(adapter);
5525
5526 #endif
5527 for (i = 0; i < adapter->num_rx_queues; i++)
5528 if (adapter->rx_ring[i]->desc)
5529 ixgbe_free_rx_resources(adapter->rx_ring[i]);
5530 }
5531
5532 /**
5533 * ixgbe_change_mtu - Change the Maximum Transfer Unit
5534 * @netdev: network interface device structure
5535 * @new_mtu: new value for maximum frame size
5536 *
5537 * Returns 0 on success, negative on failure
5538 **/
5539 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
5540 {
5541 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5542 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5543
5544 /* MTU < 68 is an error and causes problems on some kernels */
5545 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
5546 return -EINVAL;
5547
5548 /*
5549 * For 82599EB we cannot allow legacy VFs to enable their receive
5550 * paths when MTU greater than 1500 is configured. So display a
5551 * warning that legacy VFs will be disabled.
5552 */
5553 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) &&
5554 (adapter->hw.mac.type == ixgbe_mac_82599EB) &&
5555 (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)))
5556 e_warn(probe, "Setting MTU > 1500 will disable legacy VFs\n");
5557
5558 e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5559
5560 /* must set new MTU before calling down or up */
5561 netdev->mtu = new_mtu;
5562
5563 if (netif_running(netdev))
5564 ixgbe_reinit_locked(adapter);
5565
5566 return 0;
5567 }
5568
5569 /**
5570 * ixgbe_open - Called when a network interface is made active
5571 * @netdev: network interface device structure
5572 *
5573 * Returns 0 on success, negative value on failure
5574 *
5575 * The open entry point is called when a network interface is made
5576 * active by the system (IFF_UP). At this point all resources needed
5577 * for transmit and receive operations are allocated, the interrupt
5578 * handler is registered with the OS, the watchdog timer is started,
5579 * and the stack is notified that the interface is ready.
5580 **/
5581 static int ixgbe_open(struct net_device *netdev)
5582 {
5583 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5584 int err, queues;
5585
5586 /* disallow open during test */
5587 if (test_bit(__IXGBE_TESTING, &adapter->state))
5588 return -EBUSY;
5589
5590 netif_carrier_off(netdev);
5591
5592 /* allocate transmit descriptors */
5593 err = ixgbe_setup_all_tx_resources(adapter);
5594 if (err)
5595 goto err_setup_tx;
5596
5597 /* allocate receive descriptors */
5598 err = ixgbe_setup_all_rx_resources(adapter);
5599 if (err)
5600 goto err_setup_rx;
5601
5602 ixgbe_configure(adapter);
5603
5604 err = ixgbe_request_irq(adapter);
5605 if (err)
5606 goto err_req_irq;
5607
5608 /* Notify the stack of the actual queue counts. */
5609 if (adapter->num_rx_pools > 1)
5610 queues = adapter->num_rx_queues_per_pool;
5611 else
5612 queues = adapter->num_tx_queues;
5613
5614 err = netif_set_real_num_tx_queues(netdev, queues);
5615 if (err)
5616 goto err_set_queues;
5617
5618 if (adapter->num_rx_pools > 1 &&
5619 adapter->num_rx_queues > IXGBE_MAX_L2A_QUEUES)
5620 queues = IXGBE_MAX_L2A_QUEUES;
5621 else
5622 queues = adapter->num_rx_queues;
5623 err = netif_set_real_num_rx_queues(netdev, queues);
5624 if (err)
5625 goto err_set_queues;
5626
5627 ixgbe_ptp_init(adapter);
5628
5629 ixgbe_up_complete(adapter);
5630
5631 return 0;
5632
5633 err_set_queues:
5634 ixgbe_free_irq(adapter);
5635 err_req_irq:
5636 ixgbe_free_all_rx_resources(adapter);
5637 err_setup_rx:
5638 ixgbe_free_all_tx_resources(adapter);
5639 err_setup_tx:
5640 ixgbe_reset(adapter);
5641
5642 return err;
5643 }
5644
5645 static void ixgbe_close_suspend(struct ixgbe_adapter *adapter)
5646 {
5647 ixgbe_ptp_suspend(adapter);
5648
5649 ixgbe_down(adapter);
5650 ixgbe_free_irq(adapter);
5651
5652 ixgbe_free_all_tx_resources(adapter);
5653 ixgbe_free_all_rx_resources(adapter);
5654 }
5655
5656 /**
5657 * ixgbe_close - Disables a network interface
5658 * @netdev: network interface device structure
5659 *
5660 * Returns 0, this is not allowed to fail
5661 *
5662 * The close entry point is called when an interface is de-activated
5663 * by the OS. The hardware is still under the drivers control, but
5664 * needs to be disabled. A global MAC reset is issued to stop the
5665 * hardware, and all transmit and receive resources are freed.
5666 **/
5667 static int ixgbe_close(struct net_device *netdev)
5668 {
5669 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5670
5671 ixgbe_ptp_stop(adapter);
5672
5673 ixgbe_close_suspend(adapter);
5674
5675 ixgbe_fdir_filter_exit(adapter);
5676
5677 ixgbe_release_hw_control(adapter);
5678
5679 return 0;
5680 }
5681
5682 #ifdef CONFIG_PM
5683 static int ixgbe_resume(struct pci_dev *pdev)
5684 {
5685 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5686 struct net_device *netdev = adapter->netdev;
5687 u32 err;
5688
5689 adapter->hw.hw_addr = adapter->io_addr;
5690 pci_set_power_state(pdev, PCI_D0);
5691 pci_restore_state(pdev);
5692 /*
5693 * pci_restore_state clears dev->state_saved so call
5694 * pci_save_state to restore it.
5695 */
5696 pci_save_state(pdev);
5697
5698 err = pci_enable_device_mem(pdev);
5699 if (err) {
5700 e_dev_err("Cannot enable PCI device from suspend\n");
5701 return err;
5702 }
5703 smp_mb__before_atomic();
5704 clear_bit(__IXGBE_DISABLED, &adapter->state);
5705 pci_set_master(pdev);
5706
5707 pci_wake_from_d3(pdev, false);
5708
5709 ixgbe_reset(adapter);
5710
5711 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5712
5713 rtnl_lock();
5714 err = ixgbe_init_interrupt_scheme(adapter);
5715 if (!err && netif_running(netdev))
5716 err = ixgbe_open(netdev);
5717
5718 rtnl_unlock();
5719
5720 if (err)
5721 return err;
5722
5723 netif_device_attach(netdev);
5724
5725 return 0;
5726 }
5727 #endif /* CONFIG_PM */
5728
5729 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
5730 {
5731 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5732 struct net_device *netdev = adapter->netdev;
5733 struct ixgbe_hw *hw = &adapter->hw;
5734 u32 ctrl, fctrl;
5735 u32 wufc = adapter->wol;
5736 #ifdef CONFIG_PM
5737 int retval = 0;
5738 #endif
5739
5740 netif_device_detach(netdev);
5741
5742 rtnl_lock();
5743 if (netif_running(netdev))
5744 ixgbe_close_suspend(adapter);
5745 rtnl_unlock();
5746
5747 ixgbe_clear_interrupt_scheme(adapter);
5748
5749 #ifdef CONFIG_PM
5750 retval = pci_save_state(pdev);
5751 if (retval)
5752 return retval;
5753
5754 #endif
5755 if (hw->mac.ops.stop_link_on_d3)
5756 hw->mac.ops.stop_link_on_d3(hw);
5757
5758 if (wufc) {
5759 ixgbe_set_rx_mode(netdev);
5760
5761 /* enable the optics for 82599 SFP+ fiber as we can WoL */
5762 if (hw->mac.ops.enable_tx_laser)
5763 hw->mac.ops.enable_tx_laser(hw);
5764
5765 /* turn on all-multi mode if wake on multicast is enabled */
5766 if (wufc & IXGBE_WUFC_MC) {
5767 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5768 fctrl |= IXGBE_FCTRL_MPE;
5769 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
5770 }
5771
5772 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
5773 ctrl |= IXGBE_CTRL_GIO_DIS;
5774 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
5775
5776 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
5777 } else {
5778 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
5779 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
5780 }
5781
5782 switch (hw->mac.type) {
5783 case ixgbe_mac_82598EB:
5784 pci_wake_from_d3(pdev, false);
5785 break;
5786 case ixgbe_mac_82599EB:
5787 case ixgbe_mac_X540:
5788 case ixgbe_mac_X550:
5789 case ixgbe_mac_X550EM_x:
5790 pci_wake_from_d3(pdev, !!wufc);
5791 break;
5792 default:
5793 break;
5794 }
5795
5796 *enable_wake = !!wufc;
5797
5798 ixgbe_release_hw_control(adapter);
5799
5800 if (!test_and_set_bit(__IXGBE_DISABLED, &adapter->state))
5801 pci_disable_device(pdev);
5802
5803 return 0;
5804 }
5805
5806 #ifdef CONFIG_PM
5807 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
5808 {
5809 int retval;
5810 bool wake;
5811
5812 retval = __ixgbe_shutdown(pdev, &wake);
5813 if (retval)
5814 return retval;
5815
5816 if (wake) {
5817 pci_prepare_to_sleep(pdev);
5818 } else {
5819 pci_wake_from_d3(pdev, false);
5820 pci_set_power_state(pdev, PCI_D3hot);
5821 }
5822
5823 return 0;
5824 }
5825 #endif /* CONFIG_PM */
5826
5827 static void ixgbe_shutdown(struct pci_dev *pdev)
5828 {
5829 bool wake;
5830
5831 __ixgbe_shutdown(pdev, &wake);
5832
5833 if (system_state == SYSTEM_POWER_OFF) {
5834 pci_wake_from_d3(pdev, wake);
5835 pci_set_power_state(pdev, PCI_D3hot);
5836 }
5837 }
5838
5839 /**
5840 * ixgbe_update_stats - Update the board statistics counters.
5841 * @adapter: board private structure
5842 **/
5843 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
5844 {
5845 struct net_device *netdev = adapter->netdev;
5846 struct ixgbe_hw *hw = &adapter->hw;
5847 struct ixgbe_hw_stats *hwstats = &adapter->stats;
5848 u64 total_mpc = 0;
5849 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
5850 u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
5851 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
5852 u64 bytes = 0, packets = 0, hw_csum_rx_error = 0;
5853
5854 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5855 test_bit(__IXGBE_RESETTING, &adapter->state))
5856 return;
5857
5858 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
5859 u64 rsc_count = 0;
5860 u64 rsc_flush = 0;
5861 for (i = 0; i < adapter->num_rx_queues; i++) {
5862 rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
5863 rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
5864 }
5865 adapter->rsc_total_count = rsc_count;
5866 adapter->rsc_total_flush = rsc_flush;
5867 }
5868
5869 for (i = 0; i < adapter->num_rx_queues; i++) {
5870 struct ixgbe_ring *rx_ring = adapter->rx_ring[i];
5871 non_eop_descs += rx_ring->rx_stats.non_eop_descs;
5872 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
5873 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
5874 hw_csum_rx_error += rx_ring->rx_stats.csum_err;
5875 bytes += rx_ring->stats.bytes;
5876 packets += rx_ring->stats.packets;
5877 }
5878 adapter->non_eop_descs = non_eop_descs;
5879 adapter->alloc_rx_page_failed = alloc_rx_page_failed;
5880 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
5881 adapter->hw_csum_rx_error = hw_csum_rx_error;
5882 netdev->stats.rx_bytes = bytes;
5883 netdev->stats.rx_packets = packets;
5884
5885 bytes = 0;
5886 packets = 0;
5887 /* gather some stats to the adapter struct that are per queue */
5888 for (i = 0; i < adapter->num_tx_queues; i++) {
5889 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
5890 restart_queue += tx_ring->tx_stats.restart_queue;
5891 tx_busy += tx_ring->tx_stats.tx_busy;
5892 bytes += tx_ring->stats.bytes;
5893 packets += tx_ring->stats.packets;
5894 }
5895 adapter->restart_queue = restart_queue;
5896 adapter->tx_busy = tx_busy;
5897 netdev->stats.tx_bytes = bytes;
5898 netdev->stats.tx_packets = packets;
5899
5900 hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
5901
5902 /* 8 register reads */
5903 for (i = 0; i < 8; i++) {
5904 /* for packet buffers not used, the register should read 0 */
5905 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
5906 missed_rx += mpc;
5907 hwstats->mpc[i] += mpc;
5908 total_mpc += hwstats->mpc[i];
5909 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
5910 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
5911 switch (hw->mac.type) {
5912 case ixgbe_mac_82598EB:
5913 hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
5914 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
5915 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
5916 hwstats->pxonrxc[i] +=
5917 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
5918 break;
5919 case ixgbe_mac_82599EB:
5920 case ixgbe_mac_X540:
5921 case ixgbe_mac_X550:
5922 case ixgbe_mac_X550EM_x:
5923 hwstats->pxonrxc[i] +=
5924 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
5925 break;
5926 default:
5927 break;
5928 }
5929 }
5930
5931 /*16 register reads */
5932 for (i = 0; i < 16; i++) {
5933 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
5934 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
5935 if ((hw->mac.type == ixgbe_mac_82599EB) ||
5936 (hw->mac.type == ixgbe_mac_X540) ||
5937 (hw->mac.type == ixgbe_mac_X550) ||
5938 (hw->mac.type == ixgbe_mac_X550EM_x)) {
5939 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
5940 IXGBE_READ_REG(hw, IXGBE_QBTC_H(i)); /* to clear */
5941 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC_L(i));
5942 IXGBE_READ_REG(hw, IXGBE_QBRC_H(i)); /* to clear */
5943 }
5944 }
5945
5946 hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
5947 /* work around hardware counting issue */
5948 hwstats->gprc -= missed_rx;
5949
5950 ixgbe_update_xoff_received(adapter);
5951
5952 /* 82598 hardware only has a 32 bit counter in the high register */
5953 switch (hw->mac.type) {
5954 case ixgbe_mac_82598EB:
5955 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
5956 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
5957 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
5958 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
5959 break;
5960 case ixgbe_mac_X540:
5961 case ixgbe_mac_X550:
5962 case ixgbe_mac_X550EM_x:
5963 /* OS2BMC stats are X540 and later */
5964 hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC);
5965 hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC);
5966 hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC);
5967 hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC);
5968 case ixgbe_mac_82599EB:
5969 for (i = 0; i < 16; i++)
5970 adapter->hw_rx_no_dma_resources +=
5971 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5972 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
5973 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
5974 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
5975 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
5976 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
5977 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
5978 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
5979 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
5980 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
5981 #ifdef IXGBE_FCOE
5982 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
5983 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
5984 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
5985 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
5986 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
5987 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
5988 /* Add up per cpu counters for total ddp aloc fail */
5989 if (adapter->fcoe.ddp_pool) {
5990 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
5991 struct ixgbe_fcoe_ddp_pool *ddp_pool;
5992 unsigned int cpu;
5993 u64 noddp = 0, noddp_ext_buff = 0;
5994 for_each_possible_cpu(cpu) {
5995 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
5996 noddp += ddp_pool->noddp;
5997 noddp_ext_buff += ddp_pool->noddp_ext_buff;
5998 }
5999 hwstats->fcoe_noddp = noddp;
6000 hwstats->fcoe_noddp_ext_buff = noddp_ext_buff;
6001 }
6002 #endif /* IXGBE_FCOE */
6003 break;
6004 default:
6005 break;
6006 }
6007 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
6008 hwstats->bprc += bprc;
6009 hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
6010 if (hw->mac.type == ixgbe_mac_82598EB)
6011 hwstats->mprc -= bprc;
6012 hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
6013 hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
6014 hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
6015 hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
6016 hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
6017 hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
6018 hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
6019 hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
6020 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
6021 hwstats->lxontxc += lxon;
6022 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
6023 hwstats->lxofftxc += lxoff;
6024 hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
6025 hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
6026 /*
6027 * 82598 errata - tx of flow control packets is included in tx counters
6028 */
6029 xon_off_tot = lxon + lxoff;
6030 hwstats->gptc -= xon_off_tot;
6031 hwstats->mptc -= xon_off_tot;
6032 hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
6033 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
6034 hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
6035 hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
6036 hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
6037 hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
6038 hwstats->ptc64 -= xon_off_tot;
6039 hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
6040 hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
6041 hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
6042 hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
6043 hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
6044 hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
6045
6046 /* Fill out the OS statistics structure */
6047 netdev->stats.multicast = hwstats->mprc;
6048
6049 /* Rx Errors */
6050 netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
6051 netdev->stats.rx_dropped = 0;
6052 netdev->stats.rx_length_errors = hwstats->rlec;
6053 netdev->stats.rx_crc_errors = hwstats->crcerrs;
6054 netdev->stats.rx_missed_errors = total_mpc;
6055 }
6056
6057 /**
6058 * ixgbe_fdir_reinit_subtask - worker thread to reinit FDIR filter table
6059 * @adapter: pointer to the device adapter structure
6060 **/
6061 static void ixgbe_fdir_reinit_subtask(struct ixgbe_adapter *adapter)
6062 {
6063 struct ixgbe_hw *hw = &adapter->hw;
6064 int i;
6065
6066 if (!(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
6067 return;
6068
6069 adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
6070
6071 /* if interface is down do nothing */
6072 if (test_bit(__IXGBE_DOWN, &adapter->state))
6073 return;
6074
6075 /* do nothing if we are not using signature filters */
6076 if (!(adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE))
6077 return;
6078
6079 adapter->fdir_overflow++;
6080
6081 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
6082 for (i = 0; i < adapter->num_tx_queues; i++)
6083 set_bit(__IXGBE_TX_FDIR_INIT_DONE,
6084 &(adapter->tx_ring[i]->state));
6085 /* re-enable flow director interrupts */
6086 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
6087 } else {
6088 e_err(probe, "failed to finish FDIR re-initialization, "
6089 "ignored adding FDIR ATR filters\n");
6090 }
6091 }
6092
6093 /**
6094 * ixgbe_check_hang_subtask - check for hung queues and dropped interrupts
6095 * @adapter: pointer to the device adapter structure
6096 *
6097 * This function serves two purposes. First it strobes the interrupt lines
6098 * in order to make certain interrupts are occurring. Secondly it sets the
6099 * bits needed to check for TX hangs. As a result we should immediately
6100 * determine if a hang has occurred.
6101 */
6102 static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter)
6103 {
6104 struct ixgbe_hw *hw = &adapter->hw;
6105 u64 eics = 0;
6106 int i;
6107
6108 /* If we're down, removing or resetting, just bail */
6109 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6110 test_bit(__IXGBE_REMOVING, &adapter->state) ||
6111 test_bit(__IXGBE_RESETTING, &adapter->state))
6112 return;
6113
6114 /* Force detection of hung controller */
6115 if (netif_carrier_ok(adapter->netdev)) {
6116 for (i = 0; i < adapter->num_tx_queues; i++)
6117 set_check_for_tx_hang(adapter->tx_ring[i]);
6118 }
6119
6120 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
6121 /*
6122 * for legacy and MSI interrupts don't set any bits
6123 * that are enabled for EIAM, because this operation
6124 * would set *both* EIMS and EICS for any bit in EIAM
6125 */
6126 IXGBE_WRITE_REG(hw, IXGBE_EICS,
6127 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
6128 } else {
6129 /* get one bit for every active tx/rx interrupt vector */
6130 for (i = 0; i < adapter->num_q_vectors; i++) {
6131 struct ixgbe_q_vector *qv = adapter->q_vector[i];
6132 if (qv->rx.ring || qv->tx.ring)
6133 eics |= ((u64)1 << i);
6134 }
6135 }
6136
6137 /* Cause software interrupt to ensure rings are cleaned */
6138 ixgbe_irq_rearm_queues(adapter, eics);
6139
6140 }
6141
6142 /**
6143 * ixgbe_watchdog_update_link - update the link status
6144 * @adapter: pointer to the device adapter structure
6145 * @link_speed: pointer to a u32 to store the link_speed
6146 **/
6147 static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter)
6148 {
6149 struct ixgbe_hw *hw = &adapter->hw;
6150 u32 link_speed = adapter->link_speed;
6151 bool link_up = adapter->link_up;
6152 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
6153
6154 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
6155 return;
6156
6157 if (hw->mac.ops.check_link) {
6158 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
6159 } else {
6160 /* always assume link is up, if no check link function */
6161 link_speed = IXGBE_LINK_SPEED_10GB_FULL;
6162 link_up = true;
6163 }
6164
6165 if (adapter->ixgbe_ieee_pfc)
6166 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
6167
6168 if (link_up && !((adapter->flags & IXGBE_FLAG_DCB_ENABLED) && pfc_en)) {
6169 hw->mac.ops.fc_enable(hw);
6170 ixgbe_set_rx_drop_en(adapter);
6171 }
6172
6173 if (link_up ||
6174 time_after(jiffies, (adapter->link_check_timeout +
6175 IXGBE_TRY_LINK_TIMEOUT))) {
6176 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
6177 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
6178 IXGBE_WRITE_FLUSH(hw);
6179 }
6180
6181 adapter->link_up = link_up;
6182 adapter->link_speed = link_speed;
6183 }
6184
6185 static void ixgbe_update_default_up(struct ixgbe_adapter *adapter)
6186 {
6187 #ifdef CONFIG_IXGBE_DCB
6188 struct net_device *netdev = adapter->netdev;
6189 struct dcb_app app = {
6190 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE,
6191 .protocol = 0,
6192 };
6193 u8 up = 0;
6194
6195 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE)
6196 up = dcb_ieee_getapp_mask(netdev, &app);
6197
6198 adapter->default_up = (up > 1) ? (ffs(up) - 1) : 0;
6199 #endif
6200 }
6201
6202 /**
6203 * ixgbe_watchdog_link_is_up - update netif_carrier status and
6204 * print link up message
6205 * @adapter: pointer to the device adapter structure
6206 **/
6207 static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
6208 {
6209 struct net_device *netdev = adapter->netdev;
6210 struct ixgbe_hw *hw = &adapter->hw;
6211 struct net_device *upper;
6212 struct list_head *iter;
6213 u32 link_speed = adapter->link_speed;
6214 bool flow_rx, flow_tx;
6215
6216 /* only continue if link was previously down */
6217 if (netif_carrier_ok(netdev))
6218 return;
6219
6220 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
6221
6222 switch (hw->mac.type) {
6223 case ixgbe_mac_82598EB: {
6224 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
6225 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
6226 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
6227 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
6228 }
6229 break;
6230 case ixgbe_mac_X540:
6231 case ixgbe_mac_X550:
6232 case ixgbe_mac_X550EM_x:
6233 case ixgbe_mac_82599EB: {
6234 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
6235 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
6236 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
6237 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
6238 }
6239 break;
6240 default:
6241 flow_tx = false;
6242 flow_rx = false;
6243 break;
6244 }
6245
6246 adapter->last_rx_ptp_check = jiffies;
6247
6248 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
6249 ixgbe_ptp_start_cyclecounter(adapter);
6250
6251 e_info(drv, "NIC Link is Up %s, Flow Control: %s\n",
6252 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
6253 "10 Gbps" :
6254 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
6255 "1 Gbps" :
6256 (link_speed == IXGBE_LINK_SPEED_100_FULL ?
6257 "100 Mbps" :
6258 "unknown speed"))),
6259 ((flow_rx && flow_tx) ? "RX/TX" :
6260 (flow_rx ? "RX" :
6261 (flow_tx ? "TX" : "None"))));
6262
6263 netif_carrier_on(netdev);
6264 ixgbe_check_vf_rate_limit(adapter);
6265
6266 /* enable transmits */
6267 netif_tx_wake_all_queues(adapter->netdev);
6268
6269 /* enable any upper devices */
6270 rtnl_lock();
6271 netdev_for_each_all_upper_dev_rcu(adapter->netdev, upper, iter) {
6272 if (netif_is_macvlan(upper)) {
6273 struct macvlan_dev *vlan = netdev_priv(upper);
6274
6275 if (vlan->fwd_priv)
6276 netif_tx_wake_all_queues(upper);
6277 }
6278 }
6279 rtnl_unlock();
6280
6281 /* update the default user priority for VFs */
6282 ixgbe_update_default_up(adapter);
6283
6284 /* ping all the active vfs to let them know link has changed */
6285 ixgbe_ping_all_vfs(adapter);
6286 }
6287
6288 /**
6289 * ixgbe_watchdog_link_is_down - update netif_carrier status and
6290 * print link down message
6291 * @adapter: pointer to the adapter structure
6292 **/
6293 static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter *adapter)
6294 {
6295 struct net_device *netdev = adapter->netdev;
6296 struct ixgbe_hw *hw = &adapter->hw;
6297
6298 adapter->link_up = false;
6299 adapter->link_speed = 0;
6300
6301 /* only continue if link was up previously */
6302 if (!netif_carrier_ok(netdev))
6303 return;
6304
6305 /* poll for SFP+ cable when link is down */
6306 if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB)
6307 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
6308
6309 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state))
6310 ixgbe_ptp_start_cyclecounter(adapter);
6311
6312 e_info(drv, "NIC Link is Down\n");
6313 netif_carrier_off(netdev);
6314
6315 /* ping all the active vfs to let them know link has changed */
6316 ixgbe_ping_all_vfs(adapter);
6317 }
6318
6319 static bool ixgbe_ring_tx_pending(struct ixgbe_adapter *adapter)
6320 {
6321 int i;
6322
6323 for (i = 0; i < adapter->num_tx_queues; i++) {
6324 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
6325
6326 if (tx_ring->next_to_use != tx_ring->next_to_clean)
6327 return true;
6328 }
6329
6330 return false;
6331 }
6332
6333 static bool ixgbe_vf_tx_pending(struct ixgbe_adapter *adapter)
6334 {
6335 struct ixgbe_hw *hw = &adapter->hw;
6336 struct ixgbe_ring_feature *vmdq = &adapter->ring_feature[RING_F_VMDQ];
6337 u32 q_per_pool = __ALIGN_MASK(1, ~vmdq->mask);
6338
6339 int i, j;
6340
6341 if (!adapter->num_vfs)
6342 return false;
6343
6344 /* resetting the PF is only needed for MAC before X550 */
6345 if (hw->mac.type >= ixgbe_mac_X550)
6346 return false;
6347
6348 for (i = 0; i < adapter->num_vfs; i++) {
6349 for (j = 0; j < q_per_pool; j++) {
6350 u32 h, t;
6351
6352 h = IXGBE_READ_REG(hw, IXGBE_PVFTDHN(q_per_pool, i, j));
6353 t = IXGBE_READ_REG(hw, IXGBE_PVFTDTN(q_per_pool, i, j));
6354
6355 if (h != t)
6356 return true;
6357 }
6358 }
6359
6360 return false;
6361 }
6362
6363 /**
6364 * ixgbe_watchdog_flush_tx - flush queues on link down
6365 * @adapter: pointer to the device adapter structure
6366 **/
6367 static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter)
6368 {
6369 if (!netif_carrier_ok(adapter->netdev)) {
6370 if (ixgbe_ring_tx_pending(adapter) ||
6371 ixgbe_vf_tx_pending(adapter)) {
6372 /* We've lost link, so the controller stops DMA,
6373 * but we've got queued Tx work that's never going
6374 * to get done, so reset controller to flush Tx.
6375 * (Do the reset outside of interrupt context).
6376 */
6377 e_warn(drv, "initiating reset to clear Tx work after link loss\n");
6378 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
6379 }
6380 }
6381 }
6382
6383 #ifdef CONFIG_PCI_IOV
6384 static inline void ixgbe_issue_vf_flr(struct ixgbe_adapter *adapter,
6385 struct pci_dev *vfdev)
6386 {
6387 if (!pci_wait_for_pending_transaction(vfdev))
6388 e_dev_warn("Issuing VFLR with pending transactions\n");
6389
6390 e_dev_err("Issuing VFLR for VF %s\n", pci_name(vfdev));
6391 pcie_capability_set_word(vfdev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_BCR_FLR);
6392
6393 msleep(100);
6394 }
6395
6396 static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter)
6397 {
6398 struct ixgbe_hw *hw = &adapter->hw;
6399 struct pci_dev *pdev = adapter->pdev;
6400 struct pci_dev *vfdev;
6401 u32 gpc;
6402 int pos;
6403 unsigned short vf_id;
6404
6405 if (!(netif_carrier_ok(adapter->netdev)))
6406 return;
6407
6408 gpc = IXGBE_READ_REG(hw, IXGBE_TXDGPC);
6409 if (gpc) /* If incrementing then no need for the check below */
6410 return;
6411 /* Check to see if a bad DMA write target from an errant or
6412 * malicious VF has caused a PCIe error. If so then we can
6413 * issue a VFLR to the offending VF(s) and then resume without
6414 * requesting a full slot reset.
6415 */
6416
6417 if (!pdev)
6418 return;
6419
6420 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
6421 if (!pos)
6422 return;
6423
6424 /* get the device ID for the VF */
6425 pci_read_config_word(pdev, pos + PCI_SRIOV_VF_DID, &vf_id);
6426
6427 /* check status reg for all VFs owned by this PF */
6428 vfdev = pci_get_device(pdev->vendor, vf_id, NULL);
6429 while (vfdev) {
6430 if (vfdev->is_virtfn && (vfdev->physfn == pdev)) {
6431 u16 status_reg;
6432
6433 pci_read_config_word(vfdev, PCI_STATUS, &status_reg);
6434 if (status_reg & PCI_STATUS_REC_MASTER_ABORT)
6435 /* issue VFLR */
6436 ixgbe_issue_vf_flr(adapter, vfdev);
6437 }
6438
6439 vfdev = pci_get_device(pdev->vendor, vf_id, vfdev);
6440 }
6441 }
6442
6443 static void ixgbe_spoof_check(struct ixgbe_adapter *adapter)
6444 {
6445 u32 ssvpc;
6446
6447 /* Do not perform spoof check for 82598 or if not in IOV mode */
6448 if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
6449 adapter->num_vfs == 0)
6450 return;
6451
6452 ssvpc = IXGBE_READ_REG(&adapter->hw, IXGBE_SSVPC);
6453
6454 /*
6455 * ssvpc register is cleared on read, if zero then no
6456 * spoofed packets in the last interval.
6457 */
6458 if (!ssvpc)
6459 return;
6460
6461 e_warn(drv, "%u Spoofed packets detected\n", ssvpc);
6462 }
6463 #else
6464 static void ixgbe_spoof_check(struct ixgbe_adapter __always_unused *adapter)
6465 {
6466 }
6467
6468 static void
6469 ixgbe_check_for_bad_vf(struct ixgbe_adapter __always_unused *adapter)
6470 {
6471 }
6472 #endif /* CONFIG_PCI_IOV */
6473
6474
6475 /**
6476 * ixgbe_watchdog_subtask - check and bring link up
6477 * @adapter: pointer to the device adapter structure
6478 **/
6479 static void ixgbe_watchdog_subtask(struct ixgbe_adapter *adapter)
6480 {
6481 /* if interface is down, removing or resetting, do nothing */
6482 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6483 test_bit(__IXGBE_REMOVING, &adapter->state) ||
6484 test_bit(__IXGBE_RESETTING, &adapter->state))
6485 return;
6486
6487 ixgbe_watchdog_update_link(adapter);
6488
6489 if (adapter->link_up)
6490 ixgbe_watchdog_link_is_up(adapter);
6491 else
6492 ixgbe_watchdog_link_is_down(adapter);
6493
6494 ixgbe_check_for_bad_vf(adapter);
6495 ixgbe_spoof_check(adapter);
6496 ixgbe_update_stats(adapter);
6497
6498 ixgbe_watchdog_flush_tx(adapter);
6499 }
6500
6501 /**
6502 * ixgbe_sfp_detection_subtask - poll for SFP+ cable
6503 * @adapter: the ixgbe adapter structure
6504 **/
6505 static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter)
6506 {
6507 struct ixgbe_hw *hw = &adapter->hw;
6508 s32 err;
6509
6510 /* not searching for SFP so there is nothing to do here */
6511 if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) &&
6512 !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
6513 return;
6514
6515 /* someone else is in init, wait until next service event */
6516 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
6517 return;
6518
6519 err = hw->phy.ops.identify_sfp(hw);
6520 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
6521 goto sfp_out;
6522
6523 if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
6524 /* If no cable is present, then we need to reset
6525 * the next time we find a good cable. */
6526 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
6527 }
6528
6529 /* exit on error */
6530 if (err)
6531 goto sfp_out;
6532
6533 /* exit if reset not needed */
6534 if (!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
6535 goto sfp_out;
6536
6537 adapter->flags2 &= ~IXGBE_FLAG2_SFP_NEEDS_RESET;
6538
6539 /*
6540 * A module may be identified correctly, but the EEPROM may not have
6541 * support for that module. setup_sfp() will fail in that case, so
6542 * we should not allow that module to load.
6543 */
6544 if (hw->mac.type == ixgbe_mac_82598EB)
6545 err = hw->phy.ops.reset(hw);
6546 else
6547 err = hw->mac.ops.setup_sfp(hw);
6548
6549 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
6550 goto sfp_out;
6551
6552 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
6553 e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
6554
6555 sfp_out:
6556 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
6557
6558 if ((err == IXGBE_ERR_SFP_NOT_SUPPORTED) &&
6559 (adapter->netdev->reg_state == NETREG_REGISTERED)) {
6560 e_dev_err("failed to initialize because an unsupported "
6561 "SFP+ module type was detected.\n");
6562 e_dev_err("Reload the driver after installing a "
6563 "supported module.\n");
6564 unregister_netdev(adapter->netdev);
6565 }
6566 }
6567
6568 /**
6569 * ixgbe_sfp_link_config_subtask - set up link SFP after module install
6570 * @adapter: the ixgbe adapter structure
6571 **/
6572 static void ixgbe_sfp_link_config_subtask(struct ixgbe_adapter *adapter)
6573 {
6574 struct ixgbe_hw *hw = &adapter->hw;
6575 u32 speed;
6576 bool autoneg = false;
6577
6578 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_CONFIG))
6579 return;
6580
6581 /* someone else is in init, wait until next service event */
6582 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
6583 return;
6584
6585 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
6586
6587 speed = hw->phy.autoneg_advertised;
6588 if ((!speed) && (hw->mac.ops.get_link_capabilities)) {
6589 hw->mac.ops.get_link_capabilities(hw, &speed, &autoneg);
6590
6591 /* setup the highest link when no autoneg */
6592 if (!autoneg) {
6593 if (speed & IXGBE_LINK_SPEED_10GB_FULL)
6594 speed = IXGBE_LINK_SPEED_10GB_FULL;
6595 }
6596 }
6597
6598 if (hw->mac.ops.setup_link)
6599 hw->mac.ops.setup_link(hw, speed, true);
6600
6601 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
6602 adapter->link_check_timeout = jiffies;
6603 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
6604 }
6605
6606 /**
6607 * ixgbe_service_timer - Timer Call-back
6608 * @data: pointer to adapter cast into an unsigned long
6609 **/
6610 static void ixgbe_service_timer(unsigned long data)
6611 {
6612 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
6613 unsigned long next_event_offset;
6614
6615 /* poll faster when waiting for link */
6616 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
6617 next_event_offset = HZ / 10;
6618 else
6619 next_event_offset = HZ * 2;
6620
6621 /* Reset the timer */
6622 mod_timer(&adapter->service_timer, next_event_offset + jiffies);
6623
6624 ixgbe_service_event_schedule(adapter);
6625 }
6626
6627 static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter)
6628 {
6629 if (!(adapter->flags2 & IXGBE_FLAG2_RESET_REQUESTED))
6630 return;
6631
6632 adapter->flags2 &= ~IXGBE_FLAG2_RESET_REQUESTED;
6633
6634 /* If we're already down, removing or resetting, just bail */
6635 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6636 test_bit(__IXGBE_REMOVING, &adapter->state) ||
6637 test_bit(__IXGBE_RESETTING, &adapter->state))
6638 return;
6639
6640 ixgbe_dump(adapter);
6641 netdev_err(adapter->netdev, "Reset adapter\n");
6642 adapter->tx_timeout_count++;
6643
6644 rtnl_lock();
6645 ixgbe_reinit_locked(adapter);
6646 rtnl_unlock();
6647 }
6648
6649 /**
6650 * ixgbe_service_task - manages and runs subtasks
6651 * @work: pointer to work_struct containing our data
6652 **/
6653 static void ixgbe_service_task(struct work_struct *work)
6654 {
6655 struct ixgbe_adapter *adapter = container_of(work,
6656 struct ixgbe_adapter,
6657 service_task);
6658 if (ixgbe_removed(adapter->hw.hw_addr)) {
6659 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
6660 rtnl_lock();
6661 ixgbe_down(adapter);
6662 rtnl_unlock();
6663 }
6664 ixgbe_service_event_complete(adapter);
6665 return;
6666 }
6667 ixgbe_reset_subtask(adapter);
6668 ixgbe_sfp_detection_subtask(adapter);
6669 ixgbe_sfp_link_config_subtask(adapter);
6670 ixgbe_check_overtemp_subtask(adapter);
6671 ixgbe_watchdog_subtask(adapter);
6672 ixgbe_fdir_reinit_subtask(adapter);
6673 ixgbe_check_hang_subtask(adapter);
6674
6675 if (test_bit(__IXGBE_PTP_RUNNING, &adapter->state)) {
6676 ixgbe_ptp_overflow_check(adapter);
6677 ixgbe_ptp_rx_hang(adapter);
6678 }
6679
6680 ixgbe_service_event_complete(adapter);
6681 }
6682
6683 static int ixgbe_tso(struct ixgbe_ring *tx_ring,
6684 struct ixgbe_tx_buffer *first,
6685 u8 *hdr_len)
6686 {
6687 struct sk_buff *skb = first->skb;
6688 u32 vlan_macip_lens, type_tucmd;
6689 u32 mss_l4len_idx, l4len;
6690 int err;
6691
6692 if (skb->ip_summed != CHECKSUM_PARTIAL)
6693 return 0;
6694
6695 if (!skb_is_gso(skb))
6696 return 0;
6697
6698 err = skb_cow_head(skb, 0);
6699 if (err < 0)
6700 return err;
6701
6702 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
6703 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
6704
6705 if (first->protocol == htons(ETH_P_IP)) {
6706 struct iphdr *iph = ip_hdr(skb);
6707 iph->tot_len = 0;
6708 iph->check = 0;
6709 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
6710 iph->daddr, 0,
6711 IPPROTO_TCP,
6712 0);
6713 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
6714 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
6715 IXGBE_TX_FLAGS_CSUM |
6716 IXGBE_TX_FLAGS_IPV4;
6717 } else if (skb_is_gso_v6(skb)) {
6718 ipv6_hdr(skb)->payload_len = 0;
6719 tcp_hdr(skb)->check =
6720 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
6721 &ipv6_hdr(skb)->daddr,
6722 0, IPPROTO_TCP, 0);
6723 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
6724 IXGBE_TX_FLAGS_CSUM;
6725 }
6726
6727 /* compute header lengths */
6728 l4len = tcp_hdrlen(skb);
6729 *hdr_len = skb_transport_offset(skb) + l4len;
6730
6731 /* update gso size and bytecount with header size */
6732 first->gso_segs = skb_shinfo(skb)->gso_segs;
6733 first->bytecount += (first->gso_segs - 1) * *hdr_len;
6734
6735 /* mss_l4len_id: use 0 as index for TSO */
6736 mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
6737 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
6738
6739 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
6740 vlan_macip_lens = skb_network_header_len(skb);
6741 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
6742 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
6743
6744 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, type_tucmd,
6745 mss_l4len_idx);
6746
6747 return 1;
6748 }
6749
6750 static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
6751 struct ixgbe_tx_buffer *first)
6752 {
6753 struct sk_buff *skb = first->skb;
6754 u32 vlan_macip_lens = 0;
6755 u32 mss_l4len_idx = 0;
6756 u32 type_tucmd = 0;
6757
6758 if (skb->ip_summed != CHECKSUM_PARTIAL) {
6759 if (!(first->tx_flags & IXGBE_TX_FLAGS_HW_VLAN) &&
6760 !(first->tx_flags & IXGBE_TX_FLAGS_CC))
6761 return;
6762 } else {
6763 u8 l4_hdr = 0;
6764 switch (first->protocol) {
6765 case htons(ETH_P_IP):
6766 vlan_macip_lens |= skb_network_header_len(skb);
6767 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
6768 l4_hdr = ip_hdr(skb)->protocol;
6769 break;
6770 case htons(ETH_P_IPV6):
6771 vlan_macip_lens |= skb_network_header_len(skb);
6772 l4_hdr = ipv6_hdr(skb)->nexthdr;
6773 break;
6774 default:
6775 if (unlikely(net_ratelimit())) {
6776 dev_warn(tx_ring->dev,
6777 "partial checksum but proto=%x!\n",
6778 first->protocol);
6779 }
6780 break;
6781 }
6782
6783 switch (l4_hdr) {
6784 case IPPROTO_TCP:
6785 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
6786 mss_l4len_idx = tcp_hdrlen(skb) <<
6787 IXGBE_ADVTXD_L4LEN_SHIFT;
6788 break;
6789 case IPPROTO_SCTP:
6790 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
6791 mss_l4len_idx = sizeof(struct sctphdr) <<
6792 IXGBE_ADVTXD_L4LEN_SHIFT;
6793 break;
6794 case IPPROTO_UDP:
6795 mss_l4len_idx = sizeof(struct udphdr) <<
6796 IXGBE_ADVTXD_L4LEN_SHIFT;
6797 break;
6798 default:
6799 if (unlikely(net_ratelimit())) {
6800 dev_warn(tx_ring->dev,
6801 "partial checksum but l4 proto=%x!\n",
6802 l4_hdr);
6803 }
6804 break;
6805 }
6806
6807 /* update TX checksum flag */
6808 first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
6809 }
6810
6811 /* vlan_macip_lens: MACLEN, VLAN tag */
6812 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
6813 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
6814
6815 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0,
6816 type_tucmd, mss_l4len_idx);
6817 }
6818
6819 #define IXGBE_SET_FLAG(_input, _flag, _result) \
6820 ((_flag <= _result) ? \
6821 ((u32)(_input & _flag) * (_result / _flag)) : \
6822 ((u32)(_input & _flag) / (_flag / _result)))
6823
6824 static u32 ixgbe_tx_cmd_type(struct sk_buff *skb, u32 tx_flags)
6825 {
6826 /* set type for advanced descriptor with frame checksum insertion */
6827 u32 cmd_type = IXGBE_ADVTXD_DTYP_DATA |
6828 IXGBE_ADVTXD_DCMD_DEXT |
6829 IXGBE_ADVTXD_DCMD_IFCS;
6830
6831 /* set HW vlan bit if vlan is present */
6832 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_HW_VLAN,
6833 IXGBE_ADVTXD_DCMD_VLE);
6834
6835 /* set segmentation enable bits for TSO/FSO */
6836 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSO,
6837 IXGBE_ADVTXD_DCMD_TSE);
6838
6839 /* set timestamp bit if present */
6840 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSTAMP,
6841 IXGBE_ADVTXD_MAC_TSTAMP);
6842
6843 /* insert frame checksum */
6844 cmd_type ^= IXGBE_SET_FLAG(skb->no_fcs, 1, IXGBE_ADVTXD_DCMD_IFCS);
6845
6846 return cmd_type;
6847 }
6848
6849 static void ixgbe_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
6850 u32 tx_flags, unsigned int paylen)
6851 {
6852 u32 olinfo_status = paylen << IXGBE_ADVTXD_PAYLEN_SHIFT;
6853
6854 /* enable L4 checksum for TSO and TX checksum offload */
6855 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
6856 IXGBE_TX_FLAGS_CSUM,
6857 IXGBE_ADVTXD_POPTS_TXSM);
6858
6859 /* enble IPv4 checksum for TSO */
6860 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
6861 IXGBE_TX_FLAGS_IPV4,
6862 IXGBE_ADVTXD_POPTS_IXSM);
6863
6864 /*
6865 * Check Context must be set if Tx switch is enabled, which it
6866 * always is for case where virtual functions are running
6867 */
6868 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
6869 IXGBE_TX_FLAGS_CC,
6870 IXGBE_ADVTXD_CC);
6871
6872 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
6873 }
6874
6875 static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
6876 {
6877 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
6878
6879 /* Herbert's original patch had:
6880 * smp_mb__after_netif_stop_queue();
6881 * but since that doesn't exist yet, just open code it.
6882 */
6883 smp_mb();
6884
6885 /* We need to check again in a case another CPU has just
6886 * made room available.
6887 */
6888 if (likely(ixgbe_desc_unused(tx_ring) < size))
6889 return -EBUSY;
6890
6891 /* A reprieve! - use start_queue because it doesn't call schedule */
6892 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
6893 ++tx_ring->tx_stats.restart_queue;
6894 return 0;
6895 }
6896
6897 static inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
6898 {
6899 if (likely(ixgbe_desc_unused(tx_ring) >= size))
6900 return 0;
6901
6902 return __ixgbe_maybe_stop_tx(tx_ring, size);
6903 }
6904
6905 #define IXGBE_TXD_CMD (IXGBE_TXD_CMD_EOP | \
6906 IXGBE_TXD_CMD_RS)
6907
6908 static void ixgbe_tx_map(struct ixgbe_ring *tx_ring,
6909 struct ixgbe_tx_buffer *first,
6910 const u8 hdr_len)
6911 {
6912 struct sk_buff *skb = first->skb;
6913 struct ixgbe_tx_buffer *tx_buffer;
6914 union ixgbe_adv_tx_desc *tx_desc;
6915 struct skb_frag_struct *frag;
6916 dma_addr_t dma;
6917 unsigned int data_len, size;
6918 u32 tx_flags = first->tx_flags;
6919 u32 cmd_type = ixgbe_tx_cmd_type(skb, tx_flags);
6920 u16 i = tx_ring->next_to_use;
6921
6922 tx_desc = IXGBE_TX_DESC(tx_ring, i);
6923
6924 ixgbe_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);
6925
6926 size = skb_headlen(skb);
6927 data_len = skb->data_len;
6928
6929 #ifdef IXGBE_FCOE
6930 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6931 if (data_len < sizeof(struct fcoe_crc_eof)) {
6932 size -= sizeof(struct fcoe_crc_eof) - data_len;
6933 data_len = 0;
6934 } else {
6935 data_len -= sizeof(struct fcoe_crc_eof);
6936 }
6937 }
6938
6939 #endif
6940 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
6941
6942 tx_buffer = first;
6943
6944 for (frag = &skb_shinfo(skb)->frags[0];; frag++) {
6945 if (dma_mapping_error(tx_ring->dev, dma))
6946 goto dma_error;
6947
6948 /* record length, and DMA address */
6949 dma_unmap_len_set(tx_buffer, len, size);
6950 dma_unmap_addr_set(tx_buffer, dma, dma);
6951
6952 tx_desc->read.buffer_addr = cpu_to_le64(dma);
6953
6954 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
6955 tx_desc->read.cmd_type_len =
6956 cpu_to_le32(cmd_type ^ IXGBE_MAX_DATA_PER_TXD);
6957
6958 i++;
6959 tx_desc++;
6960 if (i == tx_ring->count) {
6961 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
6962 i = 0;
6963 }
6964 tx_desc->read.olinfo_status = 0;
6965
6966 dma += IXGBE_MAX_DATA_PER_TXD;
6967 size -= IXGBE_MAX_DATA_PER_TXD;
6968
6969 tx_desc->read.buffer_addr = cpu_to_le64(dma);
6970 }
6971
6972 if (likely(!data_len))
6973 break;
6974
6975 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type ^ size);
6976
6977 i++;
6978 tx_desc++;
6979 if (i == tx_ring->count) {
6980 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
6981 i = 0;
6982 }
6983 tx_desc->read.olinfo_status = 0;
6984
6985 #ifdef IXGBE_FCOE
6986 size = min_t(unsigned int, data_len, skb_frag_size(frag));
6987 #else
6988 size = skb_frag_size(frag);
6989 #endif
6990 data_len -= size;
6991
6992 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
6993 DMA_TO_DEVICE);
6994
6995 tx_buffer = &tx_ring->tx_buffer_info[i];
6996 }
6997
6998 /* write last descriptor with RS and EOP bits */
6999 cmd_type |= size | IXGBE_TXD_CMD;
7000 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
7001
7002 netdev_tx_sent_queue(txring_txq(tx_ring), first->bytecount);
7003
7004 /* set the timestamp */
7005 first->time_stamp = jiffies;
7006
7007 /*
7008 * Force memory writes to complete before letting h/w know there
7009 * are new descriptors to fetch. (Only applicable for weak-ordered
7010 * memory model archs, such as IA-64).
7011 *
7012 * We also need this memory barrier to make certain all of the
7013 * status bits have been updated before next_to_watch is written.
7014 */
7015 wmb();
7016
7017 /* set next_to_watch value indicating a packet is present */
7018 first->next_to_watch = tx_desc;
7019
7020 i++;
7021 if (i == tx_ring->count)
7022 i = 0;
7023
7024 tx_ring->next_to_use = i;
7025
7026 ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);
7027
7028 if (netif_xmit_stopped(txring_txq(tx_ring)) || !skb->xmit_more) {
7029 writel(i, tx_ring->tail);
7030
7031 /* we need this if more than one processor can write to our tail
7032 * at a time, it synchronizes IO on IA64/Altix systems
7033 */
7034 mmiowb();
7035 }
7036
7037 return;
7038 dma_error:
7039 dev_err(tx_ring->dev, "TX DMA map failed\n");
7040
7041 /* clear dma mappings for failed tx_buffer_info map */
7042 for (;;) {
7043 tx_buffer = &tx_ring->tx_buffer_info[i];
7044 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer);
7045 if (tx_buffer == first)
7046 break;
7047 if (i == 0)
7048 i = tx_ring->count;
7049 i--;
7050 }
7051
7052 tx_ring->next_to_use = i;
7053 }
7054
7055 static void ixgbe_atr(struct ixgbe_ring *ring,
7056 struct ixgbe_tx_buffer *first)
7057 {
7058 struct ixgbe_q_vector *q_vector = ring->q_vector;
7059 union ixgbe_atr_hash_dword input = { .dword = 0 };
7060 union ixgbe_atr_hash_dword common = { .dword = 0 };
7061 union {
7062 unsigned char *network;
7063 struct iphdr *ipv4;
7064 struct ipv6hdr *ipv6;
7065 } hdr;
7066 struct tcphdr *th;
7067 __be16 vlan_id;
7068
7069 /* if ring doesn't have a interrupt vector, cannot perform ATR */
7070 if (!q_vector)
7071 return;
7072
7073 /* do nothing if sampling is disabled */
7074 if (!ring->atr_sample_rate)
7075 return;
7076
7077 ring->atr_count++;
7078
7079 /* snag network header to get L4 type and address */
7080 hdr.network = skb_network_header(first->skb);
7081
7082 /* Currently only IPv4/IPv6 with TCP is supported */
7083 if ((first->protocol != htons(ETH_P_IPV6) ||
7084 hdr.ipv6->nexthdr != IPPROTO_TCP) &&
7085 (first->protocol != htons(ETH_P_IP) ||
7086 hdr.ipv4->protocol != IPPROTO_TCP))
7087 return;
7088
7089 th = tcp_hdr(first->skb);
7090
7091 /* skip this packet since it is invalid or the socket is closing */
7092 if (!th || th->fin)
7093 return;
7094
7095 /* sample on all syn packets or once every atr sample count */
7096 if (!th->syn && (ring->atr_count < ring->atr_sample_rate))
7097 return;
7098
7099 /* reset sample count */
7100 ring->atr_count = 0;
7101
7102 vlan_id = htons(first->tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT);
7103
7104 /*
7105 * src and dst are inverted, think how the receiver sees them
7106 *
7107 * The input is broken into two sections, a non-compressed section
7108 * containing vm_pool, vlan_id, and flow_type. The rest of the data
7109 * is XORed together and stored in the compressed dword.
7110 */
7111 input.formatted.vlan_id = vlan_id;
7112
7113 /*
7114 * since src port and flex bytes occupy the same word XOR them together
7115 * and write the value to source port portion of compressed dword
7116 */
7117 if (first->tx_flags & (IXGBE_TX_FLAGS_SW_VLAN | IXGBE_TX_FLAGS_HW_VLAN))
7118 common.port.src ^= th->dest ^ htons(ETH_P_8021Q);
7119 else
7120 common.port.src ^= th->dest ^ first->protocol;
7121 common.port.dst ^= th->source;
7122
7123 if (first->protocol == htons(ETH_P_IP)) {
7124 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4;
7125 common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr;
7126 } else {
7127 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6;
7128 common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^
7129 hdr.ipv6->saddr.s6_addr32[1] ^
7130 hdr.ipv6->saddr.s6_addr32[2] ^
7131 hdr.ipv6->saddr.s6_addr32[3] ^
7132 hdr.ipv6->daddr.s6_addr32[0] ^
7133 hdr.ipv6->daddr.s6_addr32[1] ^
7134 hdr.ipv6->daddr.s6_addr32[2] ^
7135 hdr.ipv6->daddr.s6_addr32[3];
7136 }
7137
7138 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
7139 ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw,
7140 input, common, ring->queue_index);
7141 }
7142
7143 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb,
7144 void *accel_priv, select_queue_fallback_t fallback)
7145 {
7146 struct ixgbe_fwd_adapter *fwd_adapter = accel_priv;
7147 #ifdef IXGBE_FCOE
7148 struct ixgbe_adapter *adapter;
7149 struct ixgbe_ring_feature *f;
7150 int txq;
7151 #endif
7152
7153 if (fwd_adapter)
7154 return skb->queue_mapping + fwd_adapter->tx_base_queue;
7155
7156 #ifdef IXGBE_FCOE
7157
7158 /*
7159 * only execute the code below if protocol is FCoE
7160 * or FIP and we have FCoE enabled on the adapter
7161 */
7162 switch (vlan_get_protocol(skb)) {
7163 case htons(ETH_P_FCOE):
7164 case htons(ETH_P_FIP):
7165 adapter = netdev_priv(dev);
7166
7167 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
7168 break;
7169 default:
7170 return fallback(dev, skb);
7171 }
7172
7173 f = &adapter->ring_feature[RING_F_FCOE];
7174
7175 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) :
7176 smp_processor_id();
7177
7178 while (txq >= f->indices)
7179 txq -= f->indices;
7180
7181 return txq + f->offset;
7182 #else
7183 return fallback(dev, skb);
7184 #endif
7185 }
7186
7187 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
7188 struct ixgbe_adapter *adapter,
7189 struct ixgbe_ring *tx_ring)
7190 {
7191 struct ixgbe_tx_buffer *first;
7192 int tso;
7193 u32 tx_flags = 0;
7194 unsigned short f;
7195 u16 count = TXD_USE_COUNT(skb_headlen(skb));
7196 __be16 protocol = skb->protocol;
7197 u8 hdr_len = 0;
7198
7199 /*
7200 * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
7201 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
7202 * + 2 desc gap to keep tail from touching head,
7203 * + 1 desc for context descriptor,
7204 * otherwise try next time
7205 */
7206 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
7207 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
7208
7209 if (ixgbe_maybe_stop_tx(tx_ring, count + 3)) {
7210 tx_ring->tx_stats.tx_busy++;
7211 return NETDEV_TX_BUSY;
7212 }
7213
7214 /* record the location of the first descriptor for this packet */
7215 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
7216 first->skb = skb;
7217 first->bytecount = skb->len;
7218 first->gso_segs = 1;
7219
7220 /* if we have a HW VLAN tag being added default to the HW one */
7221 if (vlan_tx_tag_present(skb)) {
7222 tx_flags |= vlan_tx_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT;
7223 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
7224 /* else if it is a SW VLAN check the next protocol and store the tag */
7225 } else if (protocol == htons(ETH_P_8021Q)) {
7226 struct vlan_hdr *vhdr, _vhdr;
7227 vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(_vhdr), &_vhdr);
7228 if (!vhdr)
7229 goto out_drop;
7230
7231 protocol = vhdr->h_vlan_encapsulated_proto;
7232 tx_flags |= ntohs(vhdr->h_vlan_TCI) <<
7233 IXGBE_TX_FLAGS_VLAN_SHIFT;
7234 tx_flags |= IXGBE_TX_FLAGS_SW_VLAN;
7235 }
7236
7237 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
7238 adapter->ptp_clock &&
7239 !test_and_set_bit_lock(__IXGBE_PTP_TX_IN_PROGRESS,
7240 &adapter->state)) {
7241 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
7242 tx_flags |= IXGBE_TX_FLAGS_TSTAMP;
7243
7244 /* schedule check for Tx timestamp */
7245 adapter->ptp_tx_skb = skb_get(skb);
7246 adapter->ptp_tx_start = jiffies;
7247 schedule_work(&adapter->ptp_tx_work);
7248 }
7249
7250 skb_tx_timestamp(skb);
7251
7252 #ifdef CONFIG_PCI_IOV
7253 /*
7254 * Use the l2switch_enable flag - would be false if the DMA
7255 * Tx switch had been disabled.
7256 */
7257 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7258 tx_flags |= IXGBE_TX_FLAGS_CC;
7259
7260 #endif
7261 /* DCB maps skb priorities 0-7 onto 3 bit PCP of VLAN tag. */
7262 if ((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
7263 ((tx_flags & (IXGBE_TX_FLAGS_HW_VLAN | IXGBE_TX_FLAGS_SW_VLAN)) ||
7264 (skb->priority != TC_PRIO_CONTROL))) {
7265 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
7266 tx_flags |= (skb->priority & 0x7) <<
7267 IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT;
7268 if (tx_flags & IXGBE_TX_FLAGS_SW_VLAN) {
7269 struct vlan_ethhdr *vhdr;
7270
7271 if (skb_cow_head(skb, 0))
7272 goto out_drop;
7273 vhdr = (struct vlan_ethhdr *)skb->data;
7274 vhdr->h_vlan_TCI = htons(tx_flags >>
7275 IXGBE_TX_FLAGS_VLAN_SHIFT);
7276 } else {
7277 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
7278 }
7279 }
7280
7281 /* record initial flags and protocol */
7282 first->tx_flags = tx_flags;
7283 first->protocol = protocol;
7284
7285 #ifdef IXGBE_FCOE
7286 /* setup tx offload for FCoE */
7287 if ((protocol == htons(ETH_P_FCOE)) &&
7288 (tx_ring->netdev->features & (NETIF_F_FSO | NETIF_F_FCOE_CRC))) {
7289 tso = ixgbe_fso(tx_ring, first, &hdr_len);
7290 if (tso < 0)
7291 goto out_drop;
7292
7293 goto xmit_fcoe;
7294 }
7295
7296 #endif /* IXGBE_FCOE */
7297 tso = ixgbe_tso(tx_ring, first, &hdr_len);
7298 if (tso < 0)
7299 goto out_drop;
7300 else if (!tso)
7301 ixgbe_tx_csum(tx_ring, first);
7302
7303 /* add the ATR filter if ATR is on */
7304 if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state))
7305 ixgbe_atr(tx_ring, first);
7306
7307 #ifdef IXGBE_FCOE
7308 xmit_fcoe:
7309 #endif /* IXGBE_FCOE */
7310 ixgbe_tx_map(tx_ring, first, hdr_len);
7311
7312 return NETDEV_TX_OK;
7313
7314 out_drop:
7315 dev_kfree_skb_any(first->skb);
7316 first->skb = NULL;
7317
7318 return NETDEV_TX_OK;
7319 }
7320
7321 static netdev_tx_t __ixgbe_xmit_frame(struct sk_buff *skb,
7322 struct net_device *netdev,
7323 struct ixgbe_ring *ring)
7324 {
7325 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7326 struct ixgbe_ring *tx_ring;
7327
7328 /*
7329 * The minimum packet size for olinfo paylen is 17 so pad the skb
7330 * in order to meet this minimum size requirement.
7331 */
7332 if (skb_put_padto(skb, 17))
7333 return NETDEV_TX_OK;
7334
7335 tx_ring = ring ? ring : adapter->tx_ring[skb->queue_mapping];
7336
7337 return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
7338 }
7339
7340 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
7341 struct net_device *netdev)
7342 {
7343 return __ixgbe_xmit_frame(skb, netdev, NULL);
7344 }
7345
7346 /**
7347 * ixgbe_set_mac - Change the Ethernet Address of the NIC
7348 * @netdev: network interface device structure
7349 * @p: pointer to an address structure
7350 *
7351 * Returns 0 on success, negative on failure
7352 **/
7353 static int ixgbe_set_mac(struct net_device *netdev, void *p)
7354 {
7355 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7356 struct ixgbe_hw *hw = &adapter->hw;
7357 struct sockaddr *addr = p;
7358 int ret;
7359
7360 if (!is_valid_ether_addr(addr->sa_data))
7361 return -EADDRNOTAVAIL;
7362
7363 ixgbe_del_mac_filter(adapter, hw->mac.addr, VMDQ_P(0));
7364 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
7365 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
7366
7367 ret = ixgbe_add_mac_filter(adapter, hw->mac.addr, VMDQ_P(0));
7368 return ret > 0 ? 0 : ret;
7369 }
7370
7371 static int
7372 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
7373 {
7374 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7375 struct ixgbe_hw *hw = &adapter->hw;
7376 u16 value;
7377 int rc;
7378
7379 if (prtad != hw->phy.mdio.prtad)
7380 return -EINVAL;
7381 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
7382 if (!rc)
7383 rc = value;
7384 return rc;
7385 }
7386
7387 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
7388 u16 addr, u16 value)
7389 {
7390 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7391 struct ixgbe_hw *hw = &adapter->hw;
7392
7393 if (prtad != hw->phy.mdio.prtad)
7394 return -EINVAL;
7395 return hw->phy.ops.write_reg(hw, addr, devad, value);
7396 }
7397
7398 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
7399 {
7400 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7401
7402 switch (cmd) {
7403 case SIOCSHWTSTAMP:
7404 return ixgbe_ptp_set_ts_config(adapter, req);
7405 case SIOCGHWTSTAMP:
7406 return ixgbe_ptp_get_ts_config(adapter, req);
7407 default:
7408 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
7409 }
7410 }
7411
7412 /**
7413 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
7414 * netdev->dev_addrs
7415 * @netdev: network interface device structure
7416 *
7417 * Returns non-zero on failure
7418 **/
7419 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
7420 {
7421 int err = 0;
7422 struct ixgbe_adapter *adapter = netdev_priv(dev);
7423 struct ixgbe_hw *hw = &adapter->hw;
7424
7425 if (is_valid_ether_addr(hw->mac.san_addr)) {
7426 rtnl_lock();
7427 err = dev_addr_add(dev, hw->mac.san_addr, NETDEV_HW_ADDR_T_SAN);
7428 rtnl_unlock();
7429
7430 /* update SAN MAC vmdq pool selection */
7431 hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));
7432 }
7433 return err;
7434 }
7435
7436 /**
7437 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
7438 * netdev->dev_addrs
7439 * @netdev: network interface device structure
7440 *
7441 * Returns non-zero on failure
7442 **/
7443 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
7444 {
7445 int err = 0;
7446 struct ixgbe_adapter *adapter = netdev_priv(dev);
7447 struct ixgbe_mac_info *mac = &adapter->hw.mac;
7448
7449 if (is_valid_ether_addr(mac->san_addr)) {
7450 rtnl_lock();
7451 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
7452 rtnl_unlock();
7453 }
7454 return err;
7455 }
7456
7457 #ifdef CONFIG_NET_POLL_CONTROLLER
7458 /*
7459 * Polling 'interrupt' - used by things like netconsole to send skbs
7460 * without having to re-enable interrupts. It's not called while
7461 * the interrupt routine is executing.
7462 */
7463 static void ixgbe_netpoll(struct net_device *netdev)
7464 {
7465 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7466 int i;
7467
7468 /* if interface is down do nothing */
7469 if (test_bit(__IXGBE_DOWN, &adapter->state))
7470 return;
7471
7472 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
7473 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
7474 for (i = 0; i < adapter->num_q_vectors; i++)
7475 ixgbe_msix_clean_rings(0, adapter->q_vector[i]);
7476 } else {
7477 ixgbe_intr(adapter->pdev->irq, netdev);
7478 }
7479 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
7480 }
7481
7482 #endif
7483 static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
7484 struct rtnl_link_stats64 *stats)
7485 {
7486 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7487 int i;
7488
7489 rcu_read_lock();
7490 for (i = 0; i < adapter->num_rx_queues; i++) {
7491 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]);
7492 u64 bytes, packets;
7493 unsigned int start;
7494
7495 if (ring) {
7496 do {
7497 start = u64_stats_fetch_begin_irq(&ring->syncp);
7498 packets = ring->stats.packets;
7499 bytes = ring->stats.bytes;
7500 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
7501 stats->rx_packets += packets;
7502 stats->rx_bytes += bytes;
7503 }
7504 }
7505
7506 for (i = 0; i < adapter->num_tx_queues; i++) {
7507 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->tx_ring[i]);
7508 u64 bytes, packets;
7509 unsigned int start;
7510
7511 if (ring) {
7512 do {
7513 start = u64_stats_fetch_begin_irq(&ring->syncp);
7514 packets = ring->stats.packets;
7515 bytes = ring->stats.bytes;
7516 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
7517 stats->tx_packets += packets;
7518 stats->tx_bytes += bytes;
7519 }
7520 }
7521 rcu_read_unlock();
7522 /* following stats updated by ixgbe_watchdog_task() */
7523 stats->multicast = netdev->stats.multicast;
7524 stats->rx_errors = netdev->stats.rx_errors;
7525 stats->rx_length_errors = netdev->stats.rx_length_errors;
7526 stats->rx_crc_errors = netdev->stats.rx_crc_errors;
7527 stats->rx_missed_errors = netdev->stats.rx_missed_errors;
7528 return stats;
7529 }
7530
7531 #ifdef CONFIG_IXGBE_DCB
7532 /**
7533 * ixgbe_validate_rtr - verify 802.1Qp to Rx packet buffer mapping is valid.
7534 * @adapter: pointer to ixgbe_adapter
7535 * @tc: number of traffic classes currently enabled
7536 *
7537 * Configure a valid 802.1Qp to Rx packet buffer mapping ie confirm
7538 * 802.1Q priority maps to a packet buffer that exists.
7539 */
7540 static void ixgbe_validate_rtr(struct ixgbe_adapter *adapter, u8 tc)
7541 {
7542 struct ixgbe_hw *hw = &adapter->hw;
7543 u32 reg, rsave;
7544 int i;
7545
7546 /* 82598 have a static priority to TC mapping that can not
7547 * be changed so no validation is needed.
7548 */
7549 if (hw->mac.type == ixgbe_mac_82598EB)
7550 return;
7551
7552 reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC);
7553 rsave = reg;
7554
7555 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
7556 u8 up2tc = reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT);
7557
7558 /* If up2tc is out of bounds default to zero */
7559 if (up2tc > tc)
7560 reg &= ~(0x7 << IXGBE_RTRUP2TC_UP_SHIFT);
7561 }
7562
7563 if (reg != rsave)
7564 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
7565
7566 return;
7567 }
7568
7569 /**
7570 * ixgbe_set_prio_tc_map - Configure netdev prio tc map
7571 * @adapter: Pointer to adapter struct
7572 *
7573 * Populate the netdev user priority to tc map
7574 */
7575 static void ixgbe_set_prio_tc_map(struct ixgbe_adapter *adapter)
7576 {
7577 struct net_device *dev = adapter->netdev;
7578 struct ixgbe_dcb_config *dcb_cfg = &adapter->dcb_cfg;
7579 struct ieee_ets *ets = adapter->ixgbe_ieee_ets;
7580 u8 prio;
7581
7582 for (prio = 0; prio < MAX_USER_PRIORITY; prio++) {
7583 u8 tc = 0;
7584
7585 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE)
7586 tc = ixgbe_dcb_get_tc_from_up(dcb_cfg, 0, prio);
7587 else if (ets)
7588 tc = ets->prio_tc[prio];
7589
7590 netdev_set_prio_tc_map(dev, prio, tc);
7591 }
7592 }
7593
7594 #endif /* CONFIG_IXGBE_DCB */
7595 /**
7596 * ixgbe_setup_tc - configure net_device for multiple traffic classes
7597 *
7598 * @netdev: net device to configure
7599 * @tc: number of traffic classes to enable
7600 */
7601 int ixgbe_setup_tc(struct net_device *dev, u8 tc)
7602 {
7603 struct ixgbe_adapter *adapter = netdev_priv(dev);
7604 struct ixgbe_hw *hw = &adapter->hw;
7605 bool pools;
7606
7607 /* Hardware supports up to 8 traffic classes */
7608 if (tc > adapter->dcb_cfg.num_tcs.pg_tcs ||
7609 (hw->mac.type == ixgbe_mac_82598EB &&
7610 tc < MAX_TRAFFIC_CLASS))
7611 return -EINVAL;
7612
7613 pools = (find_first_zero_bit(&adapter->fwd_bitmask, 32) > 1);
7614 if (tc && pools && adapter->num_rx_pools > IXGBE_MAX_DCBMACVLANS)
7615 return -EBUSY;
7616
7617 /* Hardware has to reinitialize queues and interrupts to
7618 * match packet buffer alignment. Unfortunately, the
7619 * hardware is not flexible enough to do this dynamically.
7620 */
7621 if (netif_running(dev))
7622 ixgbe_close(dev);
7623 ixgbe_clear_interrupt_scheme(adapter);
7624
7625 #ifdef CONFIG_IXGBE_DCB
7626 if (tc) {
7627 netdev_set_num_tc(dev, tc);
7628 ixgbe_set_prio_tc_map(adapter);
7629
7630 adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
7631
7632 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
7633 adapter->last_lfc_mode = adapter->hw.fc.requested_mode;
7634 adapter->hw.fc.requested_mode = ixgbe_fc_none;
7635 }
7636 } else {
7637 netdev_reset_tc(dev);
7638
7639 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
7640 adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
7641
7642 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
7643
7644 adapter->temp_dcb_cfg.pfc_mode_enable = false;
7645 adapter->dcb_cfg.pfc_mode_enable = false;
7646 }
7647
7648 ixgbe_validate_rtr(adapter, tc);
7649
7650 #endif /* CONFIG_IXGBE_DCB */
7651 ixgbe_init_interrupt_scheme(adapter);
7652
7653 if (netif_running(dev))
7654 return ixgbe_open(dev);
7655
7656 return 0;
7657 }
7658
7659 #ifdef CONFIG_PCI_IOV
7660 void ixgbe_sriov_reinit(struct ixgbe_adapter *adapter)
7661 {
7662 struct net_device *netdev = adapter->netdev;
7663
7664 rtnl_lock();
7665 ixgbe_setup_tc(netdev, netdev_get_num_tc(netdev));
7666 rtnl_unlock();
7667 }
7668
7669 #endif
7670 void ixgbe_do_reset(struct net_device *netdev)
7671 {
7672 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7673
7674 if (netif_running(netdev))
7675 ixgbe_reinit_locked(adapter);
7676 else
7677 ixgbe_reset(adapter);
7678 }
7679
7680 static netdev_features_t ixgbe_fix_features(struct net_device *netdev,
7681 netdev_features_t features)
7682 {
7683 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7684
7685 /* If Rx checksum is disabled, then RSC/LRO should also be disabled */
7686 if (!(features & NETIF_F_RXCSUM))
7687 features &= ~NETIF_F_LRO;
7688
7689 /* Turn off LRO if not RSC capable */
7690 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE))
7691 features &= ~NETIF_F_LRO;
7692
7693 return features;
7694 }
7695
7696 static int ixgbe_set_features(struct net_device *netdev,
7697 netdev_features_t features)
7698 {
7699 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7700 netdev_features_t changed = netdev->features ^ features;
7701 bool need_reset = false;
7702
7703 /* Make sure RSC matches LRO, reset if change */
7704 if (!(features & NETIF_F_LRO)) {
7705 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
7706 need_reset = true;
7707 adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED;
7708 } else if ((adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) &&
7709 !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)) {
7710 if (adapter->rx_itr_setting == 1 ||
7711 adapter->rx_itr_setting > IXGBE_MIN_RSC_ITR) {
7712 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
7713 need_reset = true;
7714 } else if ((changed ^ features) & NETIF_F_LRO) {
7715 e_info(probe, "rx-usecs set too low, "
7716 "disabling RSC\n");
7717 }
7718 }
7719
7720 /*
7721 * Check if Flow Director n-tuple support was enabled or disabled. If
7722 * the state changed, we need to reset.
7723 */
7724 switch (features & NETIF_F_NTUPLE) {
7725 case NETIF_F_NTUPLE:
7726 /* turn off ATR, enable perfect filters and reset */
7727 if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
7728 need_reset = true;
7729
7730 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
7731 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
7732 break;
7733 default:
7734 /* turn off perfect filters, enable ATR and reset */
7735 if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
7736 need_reset = true;
7737
7738 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
7739
7740 /* We cannot enable ATR if SR-IOV is enabled */
7741 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7742 break;
7743
7744 /* We cannot enable ATR if we have 2 or more traffic classes */
7745 if (netdev_get_num_tc(netdev) > 1)
7746 break;
7747
7748 /* We cannot enable ATR if RSS is disabled */
7749 if (adapter->ring_feature[RING_F_RSS].limit <= 1)
7750 break;
7751
7752 /* A sample rate of 0 indicates ATR disabled */
7753 if (!adapter->atr_sample_rate)
7754 break;
7755
7756 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
7757 break;
7758 }
7759
7760 if (features & NETIF_F_HW_VLAN_CTAG_RX)
7761 ixgbe_vlan_strip_enable(adapter);
7762 else
7763 ixgbe_vlan_strip_disable(adapter);
7764
7765 if (changed & NETIF_F_RXALL)
7766 need_reset = true;
7767
7768 netdev->features = features;
7769 if (need_reset)
7770 ixgbe_do_reset(netdev);
7771
7772 return 0;
7773 }
7774
7775 static int ixgbe_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
7776 struct net_device *dev,
7777 const unsigned char *addr, u16 vid,
7778 u16 flags)
7779 {
7780 /* guarantee we can provide a unique filter for the unicast address */
7781 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) {
7782 if (IXGBE_MAX_PF_MACVLANS <= netdev_uc_count(dev))
7783 return -ENOMEM;
7784 }
7785
7786 return ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, flags);
7787 }
7788
7789 static int ixgbe_ndo_bridge_setlink(struct net_device *dev,
7790 struct nlmsghdr *nlh)
7791 {
7792 struct ixgbe_adapter *adapter = netdev_priv(dev);
7793 struct nlattr *attr, *br_spec;
7794 int rem;
7795
7796 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
7797 return -EOPNOTSUPP;
7798
7799 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
7800 if (!br_spec)
7801 return -EINVAL;
7802
7803 nla_for_each_nested(attr, br_spec, rem) {
7804 __u16 mode;
7805 u32 reg = 0;
7806
7807 if (nla_type(attr) != IFLA_BRIDGE_MODE)
7808 continue;
7809
7810 if (nla_len(attr) < sizeof(mode))
7811 return -EINVAL;
7812
7813 mode = nla_get_u16(attr);
7814 if (mode == BRIDGE_MODE_VEPA) {
7815 reg = 0;
7816 adapter->flags2 &= ~IXGBE_FLAG2_BRIDGE_MODE_VEB;
7817 } else if (mode == BRIDGE_MODE_VEB) {
7818 reg = IXGBE_PFDTXGSWC_VT_LBEN;
7819 adapter->flags2 |= IXGBE_FLAG2_BRIDGE_MODE_VEB;
7820 } else
7821 return -EINVAL;
7822
7823 IXGBE_WRITE_REG(&adapter->hw, IXGBE_PFDTXGSWC, reg);
7824
7825 e_info(drv, "enabling bridge mode: %s\n",
7826 mode == BRIDGE_MODE_VEPA ? "VEPA" : "VEB");
7827 }
7828
7829 return 0;
7830 }
7831
7832 static int ixgbe_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
7833 struct net_device *dev,
7834 u32 filter_mask)
7835 {
7836 struct ixgbe_adapter *adapter = netdev_priv(dev);
7837 u16 mode;
7838
7839 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
7840 return 0;
7841
7842 if (adapter->flags2 & IXGBE_FLAG2_BRIDGE_MODE_VEB)
7843 mode = BRIDGE_MODE_VEB;
7844 else
7845 mode = BRIDGE_MODE_VEPA;
7846
7847 return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode, 0, 0);
7848 }
7849
7850 static void *ixgbe_fwd_add(struct net_device *pdev, struct net_device *vdev)
7851 {
7852 struct ixgbe_fwd_adapter *fwd_adapter = NULL;
7853 struct ixgbe_adapter *adapter = netdev_priv(pdev);
7854 int used_pools = adapter->num_vfs + adapter->num_rx_pools;
7855 unsigned int limit;
7856 int pool, err;
7857
7858 /* Hardware has a limited number of available pools. Each VF, and the
7859 * PF require a pool. Check to ensure we don't attempt to use more
7860 * then the available number of pools.
7861 */
7862 if (used_pools >= IXGBE_MAX_VF_FUNCTIONS)
7863 return ERR_PTR(-EINVAL);
7864
7865 #ifdef CONFIG_RPS
7866 if (vdev->num_rx_queues != vdev->num_tx_queues) {
7867 netdev_info(pdev, "%s: Only supports a single queue count for TX and RX\n",
7868 vdev->name);
7869 return ERR_PTR(-EINVAL);
7870 }
7871 #endif
7872 /* Check for hardware restriction on number of rx/tx queues */
7873 if (vdev->num_tx_queues > IXGBE_MAX_L2A_QUEUES ||
7874 vdev->num_tx_queues == IXGBE_BAD_L2A_QUEUE) {
7875 netdev_info(pdev,
7876 "%s: Supports RX/TX Queue counts 1,2, and 4\n",
7877 pdev->name);
7878 return ERR_PTR(-EINVAL);
7879 }
7880
7881 if (((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
7882 adapter->num_rx_pools > IXGBE_MAX_DCBMACVLANS - 1) ||
7883 (adapter->num_rx_pools > IXGBE_MAX_MACVLANS))
7884 return ERR_PTR(-EBUSY);
7885
7886 fwd_adapter = kcalloc(1, sizeof(struct ixgbe_fwd_adapter), GFP_KERNEL);
7887 if (!fwd_adapter)
7888 return ERR_PTR(-ENOMEM);
7889
7890 pool = find_first_zero_bit(&adapter->fwd_bitmask, 32);
7891 adapter->num_rx_pools++;
7892 set_bit(pool, &adapter->fwd_bitmask);
7893 limit = find_last_bit(&adapter->fwd_bitmask, 32);
7894
7895 /* Enable VMDq flag so device will be set in VM mode */
7896 adapter->flags |= IXGBE_FLAG_VMDQ_ENABLED | IXGBE_FLAG_SRIOV_ENABLED;
7897 adapter->ring_feature[RING_F_VMDQ].limit = limit + 1;
7898 adapter->ring_feature[RING_F_RSS].limit = vdev->num_tx_queues;
7899
7900 /* Force reinit of ring allocation with VMDQ enabled */
7901 err = ixgbe_setup_tc(pdev, netdev_get_num_tc(pdev));
7902 if (err)
7903 goto fwd_add_err;
7904 fwd_adapter->pool = pool;
7905 fwd_adapter->real_adapter = adapter;
7906 err = ixgbe_fwd_ring_up(vdev, fwd_adapter);
7907 if (err)
7908 goto fwd_add_err;
7909 netif_tx_start_all_queues(vdev);
7910 return fwd_adapter;
7911 fwd_add_err:
7912 /* unwind counter and free adapter struct */
7913 netdev_info(pdev,
7914 "%s: dfwd hardware acceleration failed\n", vdev->name);
7915 clear_bit(pool, &adapter->fwd_bitmask);
7916 adapter->num_rx_pools--;
7917 kfree(fwd_adapter);
7918 return ERR_PTR(err);
7919 }
7920
7921 static void ixgbe_fwd_del(struct net_device *pdev, void *priv)
7922 {
7923 struct ixgbe_fwd_adapter *fwd_adapter = priv;
7924 struct ixgbe_adapter *adapter = fwd_adapter->real_adapter;
7925 unsigned int limit;
7926
7927 clear_bit(fwd_adapter->pool, &adapter->fwd_bitmask);
7928 adapter->num_rx_pools--;
7929
7930 limit = find_last_bit(&adapter->fwd_bitmask, 32);
7931 adapter->ring_feature[RING_F_VMDQ].limit = limit + 1;
7932 ixgbe_fwd_ring_down(fwd_adapter->netdev, fwd_adapter);
7933 ixgbe_setup_tc(pdev, netdev_get_num_tc(pdev));
7934 netdev_dbg(pdev, "pool %i:%i queues %i:%i VSI bitmask %lx\n",
7935 fwd_adapter->pool, adapter->num_rx_pools,
7936 fwd_adapter->rx_base_queue,
7937 fwd_adapter->rx_base_queue + adapter->num_rx_queues_per_pool,
7938 adapter->fwd_bitmask);
7939 kfree(fwd_adapter);
7940 }
7941
7942 static const struct net_device_ops ixgbe_netdev_ops = {
7943 .ndo_open = ixgbe_open,
7944 .ndo_stop = ixgbe_close,
7945 .ndo_start_xmit = ixgbe_xmit_frame,
7946 .ndo_select_queue = ixgbe_select_queue,
7947 .ndo_set_rx_mode = ixgbe_set_rx_mode,
7948 .ndo_validate_addr = eth_validate_addr,
7949 .ndo_set_mac_address = ixgbe_set_mac,
7950 .ndo_change_mtu = ixgbe_change_mtu,
7951 .ndo_tx_timeout = ixgbe_tx_timeout,
7952 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
7953 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
7954 .ndo_do_ioctl = ixgbe_ioctl,
7955 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
7956 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
7957 .ndo_set_vf_rate = ixgbe_ndo_set_vf_bw,
7958 .ndo_set_vf_spoofchk = ixgbe_ndo_set_vf_spoofchk,
7959 .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
7960 .ndo_get_stats64 = ixgbe_get_stats64,
7961 #ifdef CONFIG_IXGBE_DCB
7962 .ndo_setup_tc = ixgbe_setup_tc,
7963 #endif
7964 #ifdef CONFIG_NET_POLL_CONTROLLER
7965 .ndo_poll_controller = ixgbe_netpoll,
7966 #endif
7967 #ifdef CONFIG_NET_RX_BUSY_POLL
7968 .ndo_busy_poll = ixgbe_low_latency_recv,
7969 #endif
7970 #ifdef IXGBE_FCOE
7971 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
7972 .ndo_fcoe_ddp_target = ixgbe_fcoe_ddp_target,
7973 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
7974 .ndo_fcoe_enable = ixgbe_fcoe_enable,
7975 .ndo_fcoe_disable = ixgbe_fcoe_disable,
7976 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
7977 .ndo_fcoe_get_hbainfo = ixgbe_fcoe_get_hbainfo,
7978 #endif /* IXGBE_FCOE */
7979 .ndo_set_features = ixgbe_set_features,
7980 .ndo_fix_features = ixgbe_fix_features,
7981 .ndo_fdb_add = ixgbe_ndo_fdb_add,
7982 .ndo_bridge_setlink = ixgbe_ndo_bridge_setlink,
7983 .ndo_bridge_getlink = ixgbe_ndo_bridge_getlink,
7984 .ndo_dfwd_add_station = ixgbe_fwd_add,
7985 .ndo_dfwd_del_station = ixgbe_fwd_del,
7986 };
7987
7988 /**
7989 * ixgbe_enumerate_functions - Get the number of ports this device has
7990 * @adapter: adapter structure
7991 *
7992 * This function enumerates the phsyical functions co-located on a single slot,
7993 * in order to determine how many ports a device has. This is most useful in
7994 * determining the required GT/s of PCIe bandwidth necessary for optimal
7995 * performance.
7996 **/
7997 static inline int ixgbe_enumerate_functions(struct ixgbe_adapter *adapter)
7998 {
7999 struct pci_dev *entry, *pdev = adapter->pdev;
8000 int physfns = 0;
8001
8002 /* Some cards can not use the generic count PCIe functions method,
8003 * because they are behind a parent switch, so we hardcode these with
8004 * the correct number of functions.
8005 */
8006 if (ixgbe_pcie_from_parent(&adapter->hw))
8007 physfns = 4;
8008
8009 list_for_each_entry(entry, &adapter->pdev->bus->devices, bus_list) {
8010 /* don't count virtual functions */
8011 if (entry->is_virtfn)
8012 continue;
8013
8014 /* When the devices on the bus don't all match our device ID,
8015 * we can't reliably determine the correct number of
8016 * functions. This can occur if a function has been direct
8017 * attached to a virtual machine using VT-d, for example. In
8018 * this case, simply return -1 to indicate this.
8019 */
8020 if ((entry->vendor != pdev->vendor) ||
8021 (entry->device != pdev->device))
8022 return -1;
8023
8024 physfns++;
8025 }
8026
8027 return physfns;
8028 }
8029
8030 /**
8031 * ixgbe_wol_supported - Check whether device supports WoL
8032 * @hw: hw specific details
8033 * @device_id: the device ID
8034 * @subdev_id: the subsystem device ID
8035 *
8036 * This function is used by probe and ethtool to determine
8037 * which devices have WoL support
8038 *
8039 **/
8040 int ixgbe_wol_supported(struct ixgbe_adapter *adapter, u16 device_id,
8041 u16 subdevice_id)
8042 {
8043 struct ixgbe_hw *hw = &adapter->hw;
8044 u16 wol_cap = adapter->eeprom_cap & IXGBE_DEVICE_CAPS_WOL_MASK;
8045 int is_wol_supported = 0;
8046
8047 switch (device_id) {
8048 case IXGBE_DEV_ID_82599_SFP:
8049 /* Only these subdevices could supports WOL */
8050 switch (subdevice_id) {
8051 case IXGBE_SUBDEV_ID_82599_SFP_WOL0:
8052 case IXGBE_SUBDEV_ID_82599_560FLR:
8053 /* only support first port */
8054 if (hw->bus.func != 0)
8055 break;
8056 case IXGBE_SUBDEV_ID_82599_SP_560FLR:
8057 case IXGBE_SUBDEV_ID_82599_SFP:
8058 case IXGBE_SUBDEV_ID_82599_RNDC:
8059 case IXGBE_SUBDEV_ID_82599_ECNA_DP:
8060 case IXGBE_SUBDEV_ID_82599_LOM_SFP:
8061 is_wol_supported = 1;
8062 break;
8063 }
8064 break;
8065 case IXGBE_DEV_ID_82599EN_SFP:
8066 /* Only this subdevice supports WOL */
8067 switch (subdevice_id) {
8068 case IXGBE_SUBDEV_ID_82599EN_SFP_OCP1:
8069 is_wol_supported = 1;
8070 break;
8071 }
8072 break;
8073 case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
8074 /* All except this subdevice support WOL */
8075 if (subdevice_id != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ)
8076 is_wol_supported = 1;
8077 break;
8078 case IXGBE_DEV_ID_82599_KX4:
8079 is_wol_supported = 1;
8080 break;
8081 case IXGBE_DEV_ID_X540T:
8082 case IXGBE_DEV_ID_X540T1:
8083 /* check eeprom to see if enabled wol */
8084 if ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0_1) ||
8085 ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0) &&
8086 (hw->bus.func == 0))) {
8087 is_wol_supported = 1;
8088 }
8089 break;
8090 }
8091
8092 return is_wol_supported;
8093 }
8094
8095 /**
8096 * ixgbe_get_platform_mac_addr - Look up MAC address in Open Firmware / IDPROM
8097 * @adapter: Pointer to adapter struct
8098 */
8099 static void ixgbe_get_platform_mac_addr(struct ixgbe_adapter *adapter)
8100 {
8101 #ifdef CONFIG_OF
8102 struct device_node *dp = pci_device_to_OF_node(adapter->pdev);
8103 struct ixgbe_hw *hw = &adapter->hw;
8104 const unsigned char *addr;
8105
8106 addr = of_get_mac_address(dp);
8107 if (addr) {
8108 ether_addr_copy(hw->mac.perm_addr, addr);
8109 return;
8110 }
8111 #endif /* CONFIG_OF */
8112
8113 #ifdef CONFIG_SPARC
8114 ether_addr_copy(hw->mac.perm_addr, idprom->id_ethaddr);
8115 #endif /* CONFIG_SPARC */
8116 }
8117
8118 /**
8119 * ixgbe_probe - Device Initialization Routine
8120 * @pdev: PCI device information struct
8121 * @ent: entry in ixgbe_pci_tbl
8122 *
8123 * Returns 0 on success, negative on failure
8124 *
8125 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
8126 * The OS initialization, configuring of the adapter private structure,
8127 * and a hardware reset occur.
8128 **/
8129 static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8130 {
8131 struct net_device *netdev;
8132 struct ixgbe_adapter *adapter = NULL;
8133 struct ixgbe_hw *hw;
8134 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
8135 int i, err, pci_using_dac, expected_gts;
8136 unsigned int indices = MAX_TX_QUEUES;
8137 u8 part_str[IXGBE_PBANUM_LENGTH];
8138 bool disable_dev = false;
8139 #ifdef IXGBE_FCOE
8140 u16 device_caps;
8141 #endif
8142 u32 eec;
8143
8144 /* Catch broken hardware that put the wrong VF device ID in
8145 * the PCIe SR-IOV capability.
8146 */
8147 if (pdev->is_virtfn) {
8148 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
8149 pci_name(pdev), pdev->vendor, pdev->device);
8150 return -EINVAL;
8151 }
8152
8153 err = pci_enable_device_mem(pdev);
8154 if (err)
8155 return err;
8156
8157 if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
8158 pci_using_dac = 1;
8159 } else {
8160 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
8161 if (err) {
8162 dev_err(&pdev->dev,
8163 "No usable DMA configuration, aborting\n");
8164 goto err_dma;
8165 }
8166 pci_using_dac = 0;
8167 }
8168
8169 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
8170 IORESOURCE_MEM), ixgbe_driver_name);
8171 if (err) {
8172 dev_err(&pdev->dev,
8173 "pci_request_selected_regions failed 0x%x\n", err);
8174 goto err_pci_reg;
8175 }
8176
8177 pci_enable_pcie_error_reporting(pdev);
8178
8179 pci_set_master(pdev);
8180 pci_save_state(pdev);
8181
8182 if (ii->mac == ixgbe_mac_82598EB) {
8183 #ifdef CONFIG_IXGBE_DCB
8184 /* 8 TC w/ 4 queues per TC */
8185 indices = 4 * MAX_TRAFFIC_CLASS;
8186 #else
8187 indices = IXGBE_MAX_RSS_INDICES;
8188 #endif
8189 }
8190
8191 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
8192 if (!netdev) {
8193 err = -ENOMEM;
8194 goto err_alloc_etherdev;
8195 }
8196
8197 SET_NETDEV_DEV(netdev, &pdev->dev);
8198
8199 adapter = netdev_priv(netdev);
8200
8201 adapter->netdev = netdev;
8202 adapter->pdev = pdev;
8203 hw = &adapter->hw;
8204 hw->back = adapter;
8205 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
8206
8207 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
8208 pci_resource_len(pdev, 0));
8209 adapter->io_addr = hw->hw_addr;
8210 if (!hw->hw_addr) {
8211 err = -EIO;
8212 goto err_ioremap;
8213 }
8214
8215 netdev->netdev_ops = &ixgbe_netdev_ops;
8216 ixgbe_set_ethtool_ops(netdev);
8217 netdev->watchdog_timeo = 5 * HZ;
8218 strlcpy(netdev->name, pci_name(pdev), sizeof(netdev->name));
8219
8220 /* Setup hw api */
8221 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
8222 hw->mac.type = ii->mac;
8223
8224 /* EEPROM */
8225 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
8226 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
8227 if (ixgbe_removed(hw->hw_addr)) {
8228 err = -EIO;
8229 goto err_ioremap;
8230 }
8231 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
8232 if (!(eec & (1 << 8)))
8233 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
8234
8235 /* PHY */
8236 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
8237 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
8238 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
8239 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
8240 hw->phy.mdio.mmds = 0;
8241 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
8242 hw->phy.mdio.dev = netdev;
8243 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
8244 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
8245
8246 ii->get_invariants(hw);
8247
8248 /* setup the private structure */
8249 err = ixgbe_sw_init(adapter);
8250 if (err)
8251 goto err_sw_init;
8252
8253 /* Make it possible the adapter to be woken up via WOL */
8254 switch (adapter->hw.mac.type) {
8255 case ixgbe_mac_82599EB:
8256 case ixgbe_mac_X540:
8257 case ixgbe_mac_X550:
8258 case ixgbe_mac_X550EM_x:
8259 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
8260 break;
8261 default:
8262 break;
8263 }
8264
8265 /*
8266 * If there is a fan on this device and it has failed log the
8267 * failure.
8268 */
8269 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
8270 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
8271 if (esdp & IXGBE_ESDP_SDP1)
8272 e_crit(probe, "Fan has stopped, replace the adapter\n");
8273 }
8274
8275 if (allow_unsupported_sfp)
8276 hw->allow_unsupported_sfp = allow_unsupported_sfp;
8277
8278 /* reset_hw fills in the perm_addr as well */
8279 hw->phy.reset_if_overtemp = true;
8280 err = hw->mac.ops.reset_hw(hw);
8281 hw->phy.reset_if_overtemp = false;
8282 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
8283 hw->mac.type == ixgbe_mac_82598EB) {
8284 err = 0;
8285 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
8286 e_dev_err("failed to load because an unsupported SFP+ or QSFP module type was detected.\n");
8287 e_dev_err("Reload the driver after installing a supported module.\n");
8288 goto err_sw_init;
8289 } else if (err) {
8290 e_dev_err("HW Init failed: %d\n", err);
8291 goto err_sw_init;
8292 }
8293
8294 #ifdef CONFIG_PCI_IOV
8295 /* SR-IOV not supported on the 82598 */
8296 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
8297 goto skip_sriov;
8298 /* Mailbox */
8299 ixgbe_init_mbx_params_pf(hw);
8300 memcpy(&hw->mbx.ops, ii->mbx_ops, sizeof(hw->mbx.ops));
8301 pci_sriov_set_totalvfs(pdev, IXGBE_MAX_VFS_DRV_LIMIT);
8302 ixgbe_enable_sriov(adapter);
8303 skip_sriov:
8304
8305 #endif
8306 netdev->features = NETIF_F_SG |
8307 NETIF_F_IP_CSUM |
8308 NETIF_F_IPV6_CSUM |
8309 NETIF_F_HW_VLAN_CTAG_TX |
8310 NETIF_F_HW_VLAN_CTAG_RX |
8311 NETIF_F_HW_VLAN_CTAG_FILTER |
8312 NETIF_F_TSO |
8313 NETIF_F_TSO6 |
8314 NETIF_F_RXHASH |
8315 NETIF_F_RXCSUM;
8316
8317 netdev->hw_features = netdev->features | NETIF_F_HW_L2FW_DOFFLOAD;
8318
8319 switch (adapter->hw.mac.type) {
8320 case ixgbe_mac_82599EB:
8321 case ixgbe_mac_X540:
8322 case ixgbe_mac_X550:
8323 case ixgbe_mac_X550EM_x:
8324 netdev->features |= NETIF_F_SCTP_CSUM;
8325 netdev->hw_features |= NETIF_F_SCTP_CSUM |
8326 NETIF_F_NTUPLE;
8327 break;
8328 default:
8329 break;
8330 }
8331
8332 netdev->hw_features |= NETIF_F_RXALL;
8333
8334 netdev->vlan_features |= NETIF_F_TSO;
8335 netdev->vlan_features |= NETIF_F_TSO6;
8336 netdev->vlan_features |= NETIF_F_IP_CSUM;
8337 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
8338 netdev->vlan_features |= NETIF_F_SG;
8339
8340 netdev->priv_flags |= IFF_UNICAST_FLT;
8341 netdev->priv_flags |= IFF_SUPP_NOFCS;
8342
8343 #ifdef CONFIG_IXGBE_DCB
8344 netdev->dcbnl_ops = &dcbnl_ops;
8345 #endif
8346
8347 #ifdef IXGBE_FCOE
8348 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
8349 unsigned int fcoe_l;
8350
8351 if (hw->mac.ops.get_device_caps) {
8352 hw->mac.ops.get_device_caps(hw, &device_caps);
8353 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
8354 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
8355 }
8356
8357
8358 fcoe_l = min_t(int, IXGBE_FCRETA_SIZE, num_online_cpus());
8359 adapter->ring_feature[RING_F_FCOE].limit = fcoe_l;
8360
8361 netdev->features |= NETIF_F_FSO |
8362 NETIF_F_FCOE_CRC;
8363
8364 netdev->vlan_features |= NETIF_F_FSO |
8365 NETIF_F_FCOE_CRC |
8366 NETIF_F_FCOE_MTU;
8367 }
8368 #endif /* IXGBE_FCOE */
8369 if (pci_using_dac) {
8370 netdev->features |= NETIF_F_HIGHDMA;
8371 netdev->vlan_features |= NETIF_F_HIGHDMA;
8372 }
8373
8374 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
8375 netdev->hw_features |= NETIF_F_LRO;
8376 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
8377 netdev->features |= NETIF_F_LRO;
8378
8379 /* make sure the EEPROM is good */
8380 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
8381 e_dev_err("The EEPROM Checksum Is Not Valid\n");
8382 err = -EIO;
8383 goto err_sw_init;
8384 }
8385
8386 ixgbe_get_platform_mac_addr(adapter);
8387
8388 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
8389
8390 if (!is_valid_ether_addr(netdev->dev_addr)) {
8391 e_dev_err("invalid MAC address\n");
8392 err = -EIO;
8393 goto err_sw_init;
8394 }
8395
8396 ixgbe_mac_set_default_filter(adapter, hw->mac.perm_addr);
8397
8398 setup_timer(&adapter->service_timer, &ixgbe_service_timer,
8399 (unsigned long) adapter);
8400
8401 if (ixgbe_removed(hw->hw_addr)) {
8402 err = -EIO;
8403 goto err_sw_init;
8404 }
8405 INIT_WORK(&adapter->service_task, ixgbe_service_task);
8406 set_bit(__IXGBE_SERVICE_INITED, &adapter->state);
8407 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
8408
8409 err = ixgbe_init_interrupt_scheme(adapter);
8410 if (err)
8411 goto err_sw_init;
8412
8413 /* WOL not supported for all devices */
8414 adapter->wol = 0;
8415 hw->eeprom.ops.read(hw, 0x2c, &adapter->eeprom_cap);
8416 hw->wol_enabled = ixgbe_wol_supported(adapter, pdev->device,
8417 pdev->subsystem_device);
8418 if (hw->wol_enabled)
8419 adapter->wol = IXGBE_WUFC_MAG;
8420
8421 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
8422
8423 /* save off EEPROM version number */
8424 hw->eeprom.ops.read(hw, 0x2e, &adapter->eeprom_verh);
8425 hw->eeprom.ops.read(hw, 0x2d, &adapter->eeprom_verl);
8426
8427 /* pick up the PCI bus settings for reporting later */
8428 hw->mac.ops.get_bus_info(hw);
8429 if (ixgbe_pcie_from_parent(hw))
8430 ixgbe_get_parent_bus_info(adapter);
8431
8432 /* calculate the expected PCIe bandwidth required for optimal
8433 * performance. Note that some older parts will never have enough
8434 * bandwidth due to being older generation PCIe parts. We clamp these
8435 * parts to ensure no warning is displayed if it can't be fixed.
8436 */
8437 switch (hw->mac.type) {
8438 case ixgbe_mac_82598EB:
8439 expected_gts = min(ixgbe_enumerate_functions(adapter) * 10, 16);
8440 break;
8441 default:
8442 expected_gts = ixgbe_enumerate_functions(adapter) * 10;
8443 break;
8444 }
8445
8446 /* don't check link if we failed to enumerate functions */
8447 if (expected_gts > 0)
8448 ixgbe_check_minimum_link(adapter, expected_gts);
8449
8450 err = ixgbe_read_pba_string_generic(hw, part_str, sizeof(part_str));
8451 if (err)
8452 strlcpy(part_str, "Unknown", sizeof(part_str));
8453 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
8454 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, PBA No: %s\n",
8455 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
8456 part_str);
8457 else
8458 e_dev_info("MAC: %d, PHY: %d, PBA No: %s\n",
8459 hw->mac.type, hw->phy.type, part_str);
8460
8461 e_dev_info("%pM\n", netdev->dev_addr);
8462
8463 /* reset the hardware with the new settings */
8464 err = hw->mac.ops.start_hw(hw);
8465 if (err == IXGBE_ERR_EEPROM_VERSION) {
8466 /* We are running on a pre-production device, log a warning */
8467 e_dev_warn("This device is a pre-production adapter/LOM. "
8468 "Please be aware there may be issues associated "
8469 "with your hardware. If you are experiencing "
8470 "problems please contact your Intel or hardware "
8471 "representative who provided you with this "
8472 "hardware.\n");
8473 }
8474 strcpy(netdev->name, "eth%d");
8475 err = register_netdev(netdev);
8476 if (err)
8477 goto err_register;
8478
8479 pci_set_drvdata(pdev, adapter);
8480
8481 /* power down the optics for 82599 SFP+ fiber */
8482 if (hw->mac.ops.disable_tx_laser)
8483 hw->mac.ops.disable_tx_laser(hw);
8484
8485 /* carrier off reporting is important to ethtool even BEFORE open */
8486 netif_carrier_off(netdev);
8487
8488 #ifdef CONFIG_IXGBE_DCA
8489 if (dca_add_requester(&pdev->dev) == 0) {
8490 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
8491 ixgbe_setup_dca(adapter);
8492 }
8493 #endif
8494 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
8495 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
8496 for (i = 0; i < adapter->num_vfs; i++)
8497 ixgbe_vf_configuration(pdev, (i | 0x10000000));
8498 }
8499
8500 /* firmware requires driver version to be 0xFFFFFFFF
8501 * since os does not support feature
8502 */
8503 if (hw->mac.ops.set_fw_drv_ver)
8504 hw->mac.ops.set_fw_drv_ver(hw, 0xFF, 0xFF, 0xFF,
8505 0xFF);
8506
8507 /* add san mac addr to netdev */
8508 ixgbe_add_sanmac_netdev(netdev);
8509
8510 e_dev_info("%s\n", ixgbe_default_device_descr);
8511
8512 #ifdef CONFIG_IXGBE_HWMON
8513 if (ixgbe_sysfs_init(adapter))
8514 e_err(probe, "failed to allocate sysfs resources\n");
8515 #endif /* CONFIG_IXGBE_HWMON */
8516
8517 ixgbe_dbg_adapter_init(adapter);
8518
8519 /* setup link for SFP devices with MNG FW, else wait for IXGBE_UP */
8520 if (ixgbe_mng_enabled(hw) && ixgbe_is_sfp(hw) && hw->mac.ops.setup_link)
8521 hw->mac.ops.setup_link(hw,
8522 IXGBE_LINK_SPEED_10GB_FULL | IXGBE_LINK_SPEED_1GB_FULL,
8523 true);
8524
8525 return 0;
8526
8527 err_register:
8528 ixgbe_release_hw_control(adapter);
8529 ixgbe_clear_interrupt_scheme(adapter);
8530 err_sw_init:
8531 ixgbe_disable_sriov(adapter);
8532 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
8533 iounmap(adapter->io_addr);
8534 kfree(adapter->mac_table);
8535 err_ioremap:
8536 disable_dev = !test_and_set_bit(__IXGBE_DISABLED, &adapter->state);
8537 free_netdev(netdev);
8538 err_alloc_etherdev:
8539 pci_release_selected_regions(pdev,
8540 pci_select_bars(pdev, IORESOURCE_MEM));
8541 err_pci_reg:
8542 err_dma:
8543 if (!adapter || disable_dev)
8544 pci_disable_device(pdev);
8545 return err;
8546 }
8547
8548 /**
8549 * ixgbe_remove - Device Removal Routine
8550 * @pdev: PCI device information struct
8551 *
8552 * ixgbe_remove is called by the PCI subsystem to alert the driver
8553 * that it should release a PCI device. The could be caused by a
8554 * Hot-Plug event, or because the driver is going to be removed from
8555 * memory.
8556 **/
8557 static void ixgbe_remove(struct pci_dev *pdev)
8558 {
8559 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
8560 struct net_device *netdev;
8561 bool disable_dev;
8562
8563 /* if !adapter then we already cleaned up in probe */
8564 if (!adapter)
8565 return;
8566
8567 netdev = adapter->netdev;
8568 ixgbe_dbg_adapter_exit(adapter);
8569
8570 set_bit(__IXGBE_REMOVING, &adapter->state);
8571 cancel_work_sync(&adapter->service_task);
8572
8573
8574 #ifdef CONFIG_IXGBE_DCA
8575 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
8576 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
8577 dca_remove_requester(&pdev->dev);
8578 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
8579 }
8580
8581 #endif
8582 #ifdef CONFIG_IXGBE_HWMON
8583 ixgbe_sysfs_exit(adapter);
8584 #endif /* CONFIG_IXGBE_HWMON */
8585
8586 /* remove the added san mac */
8587 ixgbe_del_sanmac_netdev(netdev);
8588
8589 if (netdev->reg_state == NETREG_REGISTERED)
8590 unregister_netdev(netdev);
8591
8592 #ifdef CONFIG_PCI_IOV
8593 /*
8594 * Only disable SR-IOV on unload if the user specified the now
8595 * deprecated max_vfs module parameter.
8596 */
8597 if (max_vfs)
8598 ixgbe_disable_sriov(adapter);
8599 #endif
8600 ixgbe_clear_interrupt_scheme(adapter);
8601
8602 ixgbe_release_hw_control(adapter);
8603
8604 #ifdef CONFIG_DCB
8605 kfree(adapter->ixgbe_ieee_pfc);
8606 kfree(adapter->ixgbe_ieee_ets);
8607
8608 #endif
8609 iounmap(adapter->io_addr);
8610 pci_release_selected_regions(pdev, pci_select_bars(pdev,
8611 IORESOURCE_MEM));
8612
8613 e_dev_info("complete\n");
8614
8615 kfree(adapter->mac_table);
8616 disable_dev = !test_and_set_bit(__IXGBE_DISABLED, &adapter->state);
8617 free_netdev(netdev);
8618
8619 pci_disable_pcie_error_reporting(pdev);
8620
8621 if (disable_dev)
8622 pci_disable_device(pdev);
8623 }
8624
8625 /**
8626 * ixgbe_io_error_detected - called when PCI error is detected
8627 * @pdev: Pointer to PCI device
8628 * @state: The current pci connection state
8629 *
8630 * This function is called after a PCI bus error affecting
8631 * this device has been detected.
8632 */
8633 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
8634 pci_channel_state_t state)
8635 {
8636 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
8637 struct net_device *netdev = adapter->netdev;
8638
8639 #ifdef CONFIG_PCI_IOV
8640 struct ixgbe_hw *hw = &adapter->hw;
8641 struct pci_dev *bdev, *vfdev;
8642 u32 dw0, dw1, dw2, dw3;
8643 int vf, pos;
8644 u16 req_id, pf_func;
8645
8646 if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
8647 adapter->num_vfs == 0)
8648 goto skip_bad_vf_detection;
8649
8650 bdev = pdev->bus->self;
8651 while (bdev && (pci_pcie_type(bdev) != PCI_EXP_TYPE_ROOT_PORT))
8652 bdev = bdev->bus->self;
8653
8654 if (!bdev)
8655 goto skip_bad_vf_detection;
8656
8657 pos = pci_find_ext_capability(bdev, PCI_EXT_CAP_ID_ERR);
8658 if (!pos)
8659 goto skip_bad_vf_detection;
8660
8661 dw0 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG);
8662 dw1 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 4);
8663 dw2 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 8);
8664 dw3 = ixgbe_read_pci_cfg_dword(hw, pos + PCI_ERR_HEADER_LOG + 12);
8665 if (ixgbe_removed(hw->hw_addr))
8666 goto skip_bad_vf_detection;
8667
8668 req_id = dw1 >> 16;
8669 /* On the 82599 if bit 7 of the requestor ID is set then it's a VF */
8670 if (!(req_id & 0x0080))
8671 goto skip_bad_vf_detection;
8672
8673 pf_func = req_id & 0x01;
8674 if ((pf_func & 1) == (pdev->devfn & 1)) {
8675 unsigned int device_id;
8676
8677 vf = (req_id & 0x7F) >> 1;
8678 e_dev_err("VF %d has caused a PCIe error\n", vf);
8679 e_dev_err("TLP: dw0: %8.8x\tdw1: %8.8x\tdw2: "
8680 "%8.8x\tdw3: %8.8x\n",
8681 dw0, dw1, dw2, dw3);
8682 switch (adapter->hw.mac.type) {
8683 case ixgbe_mac_82599EB:
8684 device_id = IXGBE_82599_VF_DEVICE_ID;
8685 break;
8686 case ixgbe_mac_X540:
8687 device_id = IXGBE_X540_VF_DEVICE_ID;
8688 break;
8689 case ixgbe_mac_X550:
8690 device_id = IXGBE_DEV_ID_X550_VF;
8691 break;
8692 case ixgbe_mac_X550EM_x:
8693 device_id = IXGBE_DEV_ID_X550EM_X_VF;
8694 break;
8695 default:
8696 device_id = 0;
8697 break;
8698 }
8699
8700 /* Find the pci device of the offending VF */
8701 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL, device_id, NULL);
8702 while (vfdev) {
8703 if (vfdev->devfn == (req_id & 0xFF))
8704 break;
8705 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL,
8706 device_id, vfdev);
8707 }
8708 /*
8709 * There's a slim chance the VF could have been hot plugged,
8710 * so if it is no longer present we don't need to issue the
8711 * VFLR. Just clean up the AER in that case.
8712 */
8713 if (vfdev) {
8714 ixgbe_issue_vf_flr(adapter, vfdev);
8715 /* Free device reference count */
8716 pci_dev_put(vfdev);
8717 }
8718
8719 pci_cleanup_aer_uncorrect_error_status(pdev);
8720 }
8721
8722 /*
8723 * Even though the error may have occurred on the other port
8724 * we still need to increment the vf error reference count for
8725 * both ports because the I/O resume function will be called
8726 * for both of them.
8727 */
8728 adapter->vferr_refcount++;
8729
8730 return PCI_ERS_RESULT_RECOVERED;
8731
8732 skip_bad_vf_detection:
8733 #endif /* CONFIG_PCI_IOV */
8734 if (!test_bit(__IXGBE_SERVICE_INITED, &adapter->state))
8735 return PCI_ERS_RESULT_DISCONNECT;
8736
8737 rtnl_lock();
8738 netif_device_detach(netdev);
8739
8740 if (state == pci_channel_io_perm_failure) {
8741 rtnl_unlock();
8742 return PCI_ERS_RESULT_DISCONNECT;
8743 }
8744
8745 if (netif_running(netdev))
8746 ixgbe_down(adapter);
8747
8748 if (!test_and_set_bit(__IXGBE_DISABLED, &adapter->state))
8749 pci_disable_device(pdev);
8750 rtnl_unlock();
8751
8752 /* Request a slot reset. */
8753 return PCI_ERS_RESULT_NEED_RESET;
8754 }
8755
8756 /**
8757 * ixgbe_io_slot_reset - called after the pci bus has been reset.
8758 * @pdev: Pointer to PCI device
8759 *
8760 * Restart the card from scratch, as if from a cold-boot.
8761 */
8762 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
8763 {
8764 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
8765 pci_ers_result_t result;
8766 int err;
8767
8768 if (pci_enable_device_mem(pdev)) {
8769 e_err(probe, "Cannot re-enable PCI device after reset.\n");
8770 result = PCI_ERS_RESULT_DISCONNECT;
8771 } else {
8772 smp_mb__before_atomic();
8773 clear_bit(__IXGBE_DISABLED, &adapter->state);
8774 adapter->hw.hw_addr = adapter->io_addr;
8775 pci_set_master(pdev);
8776 pci_restore_state(pdev);
8777 pci_save_state(pdev);
8778
8779 pci_wake_from_d3(pdev, false);
8780
8781 ixgbe_reset(adapter);
8782 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
8783 result = PCI_ERS_RESULT_RECOVERED;
8784 }
8785
8786 err = pci_cleanup_aer_uncorrect_error_status(pdev);
8787 if (err) {
8788 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
8789 "failed 0x%0x\n", err);
8790 /* non-fatal, continue */
8791 }
8792
8793 return result;
8794 }
8795
8796 /**
8797 * ixgbe_io_resume - called when traffic can start flowing again.
8798 * @pdev: Pointer to PCI device
8799 *
8800 * This callback is called when the error recovery driver tells us that
8801 * its OK to resume normal operation.
8802 */
8803 static void ixgbe_io_resume(struct pci_dev *pdev)
8804 {
8805 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
8806 struct net_device *netdev = adapter->netdev;
8807
8808 #ifdef CONFIG_PCI_IOV
8809 if (adapter->vferr_refcount) {
8810 e_info(drv, "Resuming after VF err\n");
8811 adapter->vferr_refcount--;
8812 return;
8813 }
8814
8815 #endif
8816 if (netif_running(netdev))
8817 ixgbe_up(adapter);
8818
8819 netif_device_attach(netdev);
8820 }
8821
8822 static const struct pci_error_handlers ixgbe_err_handler = {
8823 .error_detected = ixgbe_io_error_detected,
8824 .slot_reset = ixgbe_io_slot_reset,
8825 .resume = ixgbe_io_resume,
8826 };
8827
8828 static struct pci_driver ixgbe_driver = {
8829 .name = ixgbe_driver_name,
8830 .id_table = ixgbe_pci_tbl,
8831 .probe = ixgbe_probe,
8832 .remove = ixgbe_remove,
8833 #ifdef CONFIG_PM
8834 .suspend = ixgbe_suspend,
8835 .resume = ixgbe_resume,
8836 #endif
8837 .shutdown = ixgbe_shutdown,
8838 .sriov_configure = ixgbe_pci_sriov_configure,
8839 .err_handler = &ixgbe_err_handler
8840 };
8841
8842 /**
8843 * ixgbe_init_module - Driver Registration Routine
8844 *
8845 * ixgbe_init_module is the first routine called when the driver is
8846 * loaded. All it does is register with the PCI subsystem.
8847 **/
8848 static int __init ixgbe_init_module(void)
8849 {
8850 int ret;
8851 pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
8852 pr_info("%s\n", ixgbe_copyright);
8853
8854 ixgbe_dbg_init();
8855
8856 ret = pci_register_driver(&ixgbe_driver);
8857 if (ret) {
8858 ixgbe_dbg_exit();
8859 return ret;
8860 }
8861
8862 #ifdef CONFIG_IXGBE_DCA
8863 dca_register_notify(&dca_notifier);
8864 #endif
8865
8866 return 0;
8867 }
8868
8869 module_init(ixgbe_init_module);
8870
8871 /**
8872 * ixgbe_exit_module - Driver Exit Cleanup Routine
8873 *
8874 * ixgbe_exit_module is called just before the driver is removed
8875 * from memory.
8876 **/
8877 static void __exit ixgbe_exit_module(void)
8878 {
8879 #ifdef CONFIG_IXGBE_DCA
8880 dca_unregister_notify(&dca_notifier);
8881 #endif
8882 pci_unregister_driver(&ixgbe_driver);
8883
8884 ixgbe_dbg_exit();
8885
8886 rcu_barrier(); /* Wait for completion of call_rcu()'s */
8887 }
8888
8889 #ifdef CONFIG_IXGBE_DCA
8890 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
8891 void *p)
8892 {
8893 int ret_val;
8894
8895 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
8896 __ixgbe_notify_dca);
8897
8898 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
8899 }
8900
8901 #endif /* CONFIG_IXGBE_DCA */
8902
8903 module_exit(ixgbe_exit_module);
8904
8905 /* ixgbe_main.c */
Linux kernel - Deliverables
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