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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 - 2013 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 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26 *******************************************************************************/
27
28 #include <linux/types.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/netdevice.h>
32 #include <linux/vmalloc.h>
33 #include <linux/string.h>
34 #include <linux/in.h>
35 #include <linux/interrupt.h>
36 #include <linux/ip.h>
37 #include <linux/tcp.h>
38 #include <linux/sctp.h>
39 #include <linux/pkt_sched.h>
40 #include <linux/ipv6.h>
41 #include <linux/slab.h>
42 #include <net/checksum.h>
43 #include <net/ip6_checksum.h>
44 #include <linux/ethtool.h>
45 #include <linux/if.h>
46 #include <linux/if_vlan.h>
47 #include <linux/if_bridge.h>
48 #include <linux/prefetch.h>
49 #include <scsi/fc/fc_fcoe.h>
50
51 #include "ixgbe.h"
52 #include "ixgbe_common.h"
53 #include "ixgbe_dcb_82599.h"
54 #include "ixgbe_sriov.h"
55
56 char ixgbe_driver_name[] = "ixgbe";
57 static const char ixgbe_driver_string[] =
58 "Intel(R) 10 Gigabit PCI Express Network Driver";
59 #ifdef IXGBE_FCOE
60 char ixgbe_default_device_descr[] =
61 "Intel(R) 10 Gigabit Network Connection";
62 #else
63 static char ixgbe_default_device_descr[] =
64 "Intel(R) 10 Gigabit Network Connection";
65 #endif
66 #define DRV_VERSION "3.13.10-k"
67 const char ixgbe_driver_version[] = DRV_VERSION;
68 static const char ixgbe_copyright[] =
69 "Copyright (c) 1999-2013 Intel Corporation.";
70
71 static const struct ixgbe_info *ixgbe_info_tbl[] = {
72 [board_82598] = &ixgbe_82598_info,
73 [board_82599] = &ixgbe_82599_info,
74 [board_X540] = &ixgbe_X540_info,
75 };
76
77 /* ixgbe_pci_tbl - PCI Device ID Table
78 *
79 * Wildcard entries (PCI_ANY_ID) should come last
80 * Last entry must be all 0s
81 *
82 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
83 * Class, Class Mask, private data (not used) }
84 */
85 static DEFINE_PCI_DEVICE_TABLE(ixgbe_pci_tbl) = {
86 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598), board_82598 },
87 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT), board_82598 },
88 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT), board_82598 },
89 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT), board_82598 },
90 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2), board_82598 },
91 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4), board_82598 },
92 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT), board_82598 },
93 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT), board_82598 },
94 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM), board_82598 },
95 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR), board_82598 },
96 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM), board_82598 },
97 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX), board_82598 },
98 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4), board_82599 },
99 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM), board_82599 },
100 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR), board_82599 },
101 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP), board_82599 },
102 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM), board_82599 },
103 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ), board_82599 },
104 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4), board_82599 },
105 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_BACKPLANE_FCOE), board_82599 },
106 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_FCOE), board_82599 },
107 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM), board_82599 },
108 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE), board_82599 },
109 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T), board_X540 },
110 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF2), board_82599 },
111 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_LS), board_82599 },
112 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599EN_SFP), board_82599 },
113 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF_QP), board_82599 },
114 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T1), board_X540 },
115 /* required last entry */
116 {0, }
117 };
118 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
119
120 #ifdef CONFIG_IXGBE_DCA
121 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
122 void *p);
123 static struct notifier_block dca_notifier = {
124 .notifier_call = ixgbe_notify_dca,
125 .next = NULL,
126 .priority = 0
127 };
128 #endif
129
130 #ifdef CONFIG_PCI_IOV
131 static unsigned int max_vfs;
132 module_param(max_vfs, uint, 0);
133 MODULE_PARM_DESC(max_vfs,
134 "Maximum number of virtual functions to allocate per physical function - default is zero and maximum value is 63");
135 #endif /* CONFIG_PCI_IOV */
136
137 static unsigned int allow_unsupported_sfp;
138 module_param(allow_unsupported_sfp, uint, 0);
139 MODULE_PARM_DESC(allow_unsupported_sfp,
140 "Allow unsupported and untested SFP+ modules on 82599-based adapters");
141
142 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
143 static int debug = -1;
144 module_param(debug, int, 0);
145 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
146
147 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
148 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
149 MODULE_LICENSE("GPL");
150 MODULE_VERSION(DRV_VERSION);
151
152 static int ixgbe_read_pci_cfg_word_parent(struct ixgbe_adapter *adapter,
153 u32 reg, u16 *value)
154 {
155 int pos = 0;
156 struct pci_dev *parent_dev;
157 struct pci_bus *parent_bus;
158
159 parent_bus = adapter->pdev->bus->parent;
160 if (!parent_bus)
161 return -1;
162
163 parent_dev = parent_bus->self;
164 if (!parent_dev)
165 return -1;
166
167 pos = pci_find_capability(parent_dev, PCI_CAP_ID_EXP);
168 if (!pos)
169 return -1;
170
171 pci_read_config_word(parent_dev, pos + reg, value);
172 return 0;
173 }
174
175 static s32 ixgbe_get_parent_bus_info(struct ixgbe_adapter *adapter)
176 {
177 struct ixgbe_hw *hw = &adapter->hw;
178 u16 link_status = 0;
179 int err;
180
181 hw->bus.type = ixgbe_bus_type_pci_express;
182
183 /* Get the negotiated link width and speed from PCI config space of the
184 * parent, as this device is behind a switch
185 */
186 err = ixgbe_read_pci_cfg_word_parent(adapter, 18, &link_status);
187
188 /* assume caller will handle error case */
189 if (err)
190 return err;
191
192 hw->bus.width = ixgbe_convert_bus_width(link_status);
193 hw->bus.speed = ixgbe_convert_bus_speed(link_status);
194
195 return 0;
196 }
197
198 static void ixgbe_service_event_schedule(struct ixgbe_adapter *adapter)
199 {
200 if (!test_bit(__IXGBE_DOWN, &adapter->state) &&
201 !test_and_set_bit(__IXGBE_SERVICE_SCHED, &adapter->state))
202 schedule_work(&adapter->service_task);
203 }
204
205 static void ixgbe_service_event_complete(struct ixgbe_adapter *adapter)
206 {
207 BUG_ON(!test_bit(__IXGBE_SERVICE_SCHED, &adapter->state));
208
209 /* flush memory to make sure state is correct before next watchdog */
210 smp_mb__before_clear_bit();
211 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
212 }
213
214 struct ixgbe_reg_info {
215 u32 ofs;
216 char *name;
217 };
218
219 static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {
220
221 /* General Registers */
222 {IXGBE_CTRL, "CTRL"},
223 {IXGBE_STATUS, "STATUS"},
224 {IXGBE_CTRL_EXT, "CTRL_EXT"},
225
226 /* Interrupt Registers */
227 {IXGBE_EICR, "EICR"},
228
229 /* RX Registers */
230 {IXGBE_SRRCTL(0), "SRRCTL"},
231 {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
232 {IXGBE_RDLEN(0), "RDLEN"},
233 {IXGBE_RDH(0), "RDH"},
234 {IXGBE_RDT(0), "RDT"},
235 {IXGBE_RXDCTL(0), "RXDCTL"},
236 {IXGBE_RDBAL(0), "RDBAL"},
237 {IXGBE_RDBAH(0), "RDBAH"},
238
239 /* TX Registers */
240 {IXGBE_TDBAL(0), "TDBAL"},
241 {IXGBE_TDBAH(0), "TDBAH"},
242 {IXGBE_TDLEN(0), "TDLEN"},
243 {IXGBE_TDH(0), "TDH"},
244 {IXGBE_TDT(0), "TDT"},
245 {IXGBE_TXDCTL(0), "TXDCTL"},
246
247 /* List Terminator */
248 {}
249 };
250
251
252 /*
253 * ixgbe_regdump - register printout routine
254 */
255 static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
256 {
257 int i = 0, j = 0;
258 char rname[16];
259 u32 regs[64];
260
261 switch (reginfo->ofs) {
262 case IXGBE_SRRCTL(0):
263 for (i = 0; i < 64; i++)
264 regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
265 break;
266 case IXGBE_DCA_RXCTRL(0):
267 for (i = 0; i < 64; i++)
268 regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
269 break;
270 case IXGBE_RDLEN(0):
271 for (i = 0; i < 64; i++)
272 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
273 break;
274 case IXGBE_RDH(0):
275 for (i = 0; i < 64; i++)
276 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
277 break;
278 case IXGBE_RDT(0):
279 for (i = 0; i < 64; i++)
280 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
281 break;
282 case IXGBE_RXDCTL(0):
283 for (i = 0; i < 64; i++)
284 regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
285 break;
286 case IXGBE_RDBAL(0):
287 for (i = 0; i < 64; i++)
288 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
289 break;
290 case IXGBE_RDBAH(0):
291 for (i = 0; i < 64; i++)
292 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
293 break;
294 case IXGBE_TDBAL(0):
295 for (i = 0; i < 64; i++)
296 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
297 break;
298 case IXGBE_TDBAH(0):
299 for (i = 0; i < 64; i++)
300 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
301 break;
302 case IXGBE_TDLEN(0):
303 for (i = 0; i < 64; i++)
304 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
305 break;
306 case IXGBE_TDH(0):
307 for (i = 0; i < 64; i++)
308 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
309 break;
310 case IXGBE_TDT(0):
311 for (i = 0; i < 64; i++)
312 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
313 break;
314 case IXGBE_TXDCTL(0):
315 for (i = 0; i < 64; i++)
316 regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
317 break;
318 default:
319 pr_info("%-15s %08x\n", reginfo->name,
320 IXGBE_READ_REG(hw, reginfo->ofs));
321 return;
322 }
323
324 for (i = 0; i < 8; i++) {
325 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7);
326 pr_err("%-15s", rname);
327 for (j = 0; j < 8; j++)
328 pr_cont(" %08x", regs[i*8+j]);
329 pr_cont("\n");
330 }
331
332 }
333
334 /*
335 * ixgbe_dump - Print registers, tx-rings and rx-rings
336 */
337 static void ixgbe_dump(struct ixgbe_adapter *adapter)
338 {
339 struct net_device *netdev = adapter->netdev;
340 struct ixgbe_hw *hw = &adapter->hw;
341 struct ixgbe_reg_info *reginfo;
342 int n = 0;
343 struct ixgbe_ring *tx_ring;
344 struct ixgbe_tx_buffer *tx_buffer;
345 union ixgbe_adv_tx_desc *tx_desc;
346 struct my_u0 { u64 a; u64 b; } *u0;
347 struct ixgbe_ring *rx_ring;
348 union ixgbe_adv_rx_desc *rx_desc;
349 struct ixgbe_rx_buffer *rx_buffer_info;
350 u32 staterr;
351 int i = 0;
352
353 if (!netif_msg_hw(adapter))
354 return;
355
356 /* Print netdevice Info */
357 if (netdev) {
358 dev_info(&adapter->pdev->dev, "Net device Info\n");
359 pr_info("Device Name state "
360 "trans_start last_rx\n");
361 pr_info("%-15s %016lX %016lX %016lX\n",
362 netdev->name,
363 netdev->state,
364 netdev->trans_start,
365 netdev->last_rx);
366 }
367
368 /* Print Registers */
369 dev_info(&adapter->pdev->dev, "Register Dump\n");
370 pr_info(" Register Name Value\n");
371 for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
372 reginfo->name; reginfo++) {
373 ixgbe_regdump(hw, reginfo);
374 }
375
376 /* Print TX Ring Summary */
377 if (!netdev || !netif_running(netdev))
378 goto exit;
379
380 dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
381 pr_info(" %s %s %s %s\n",
382 "Queue [NTU] [NTC] [bi(ntc)->dma ]",
383 "leng", "ntw", "timestamp");
384 for (n = 0; n < adapter->num_tx_queues; n++) {
385 tx_ring = adapter->tx_ring[n];
386 tx_buffer = &tx_ring->tx_buffer_info[tx_ring->next_to_clean];
387 pr_info(" %5d %5X %5X %016llX %08X %p %016llX\n",
388 n, tx_ring->next_to_use, tx_ring->next_to_clean,
389 (u64)dma_unmap_addr(tx_buffer, dma),
390 dma_unmap_len(tx_buffer, len),
391 tx_buffer->next_to_watch,
392 (u64)tx_buffer->time_stamp);
393 }
394
395 /* Print TX Rings */
396 if (!netif_msg_tx_done(adapter))
397 goto rx_ring_summary;
398
399 dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
400
401 /* Transmit Descriptor Formats
402 *
403 * 82598 Advanced Transmit Descriptor
404 * +--------------------------------------------------------------+
405 * 0 | Buffer Address [63:0] |
406 * +--------------------------------------------------------------+
407 * 8 | PAYLEN | POPTS | IDX | STA | DCMD |DTYP | RSV | DTALEN |
408 * +--------------------------------------------------------------+
409 * 63 46 45 40 39 36 35 32 31 24 23 20 19 0
410 *
411 * 82598 Advanced Transmit Descriptor (Write-Back Format)
412 * +--------------------------------------------------------------+
413 * 0 | RSV [63:0] |
414 * +--------------------------------------------------------------+
415 * 8 | RSV | STA | NXTSEQ |
416 * +--------------------------------------------------------------+
417 * 63 36 35 32 31 0
418 *
419 * 82599+ Advanced Transmit Descriptor
420 * +--------------------------------------------------------------+
421 * 0 | Buffer Address [63:0] |
422 * +--------------------------------------------------------------+
423 * 8 |PAYLEN |POPTS|CC|IDX |STA |DCMD |DTYP |MAC |RSV |DTALEN |
424 * +--------------------------------------------------------------+
425 * 63 46 45 40 39 38 36 35 32 31 24 23 20 19 18 17 16 15 0
426 *
427 * 82599+ Advanced Transmit Descriptor (Write-Back Format)
428 * +--------------------------------------------------------------+
429 * 0 | RSV [63:0] |
430 * +--------------------------------------------------------------+
431 * 8 | RSV | STA | RSV |
432 * +--------------------------------------------------------------+
433 * 63 36 35 32 31 0
434 */
435
436 for (n = 0; n < adapter->num_tx_queues; n++) {
437 tx_ring = adapter->tx_ring[n];
438 pr_info("------------------------------------\n");
439 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index);
440 pr_info("------------------------------------\n");
441 pr_info("%s%s %s %s %s %s\n",
442 "T [desc] [address 63:0 ] ",
443 "[PlPOIdStDDt Ln] [bi->dma ] ",
444 "leng", "ntw", "timestamp", "bi->skb");
445
446 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
447 tx_desc = IXGBE_TX_DESC(tx_ring, i);
448 tx_buffer = &tx_ring->tx_buffer_info[i];
449 u0 = (struct my_u0 *)tx_desc;
450 if (dma_unmap_len(tx_buffer, len) > 0) {
451 pr_info("T [0x%03X] %016llX %016llX %016llX %08X %p %016llX %p",
452 i,
453 le64_to_cpu(u0->a),
454 le64_to_cpu(u0->b),
455 (u64)dma_unmap_addr(tx_buffer, dma),
456 dma_unmap_len(tx_buffer, len),
457 tx_buffer->next_to_watch,
458 (u64)tx_buffer->time_stamp,
459 tx_buffer->skb);
460 if (i == tx_ring->next_to_use &&
461 i == tx_ring->next_to_clean)
462 pr_cont(" NTC/U\n");
463 else if (i == tx_ring->next_to_use)
464 pr_cont(" NTU\n");
465 else if (i == tx_ring->next_to_clean)
466 pr_cont(" NTC\n");
467 else
468 pr_cont("\n");
469
470 if (netif_msg_pktdata(adapter) &&
471 tx_buffer->skb)
472 print_hex_dump(KERN_INFO, "",
473 DUMP_PREFIX_ADDRESS, 16, 1,
474 tx_buffer->skb->data,
475 dma_unmap_len(tx_buffer, len),
476 true);
477 }
478 }
479 }
480
481 /* Print RX Rings Summary */
482 rx_ring_summary:
483 dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
484 pr_info("Queue [NTU] [NTC]\n");
485 for (n = 0; n < adapter->num_rx_queues; n++) {
486 rx_ring = adapter->rx_ring[n];
487 pr_info("%5d %5X %5X\n",
488 n, rx_ring->next_to_use, rx_ring->next_to_clean);
489 }
490
491 /* Print RX Rings */
492 if (!netif_msg_rx_status(adapter))
493 goto exit;
494
495 dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
496
497 /* Receive Descriptor Formats
498 *
499 * 82598 Advanced Receive Descriptor (Read) Format
500 * 63 1 0
501 * +-----------------------------------------------------+
502 * 0 | Packet Buffer Address [63:1] |A0/NSE|
503 * +----------------------------------------------+------+
504 * 8 | Header Buffer Address [63:1] | DD |
505 * +-----------------------------------------------------+
506 *
507 *
508 * 82598 Advanced Receive Descriptor (Write-Back) Format
509 *
510 * 63 48 47 32 31 30 21 20 16 15 4 3 0
511 * +------------------------------------------------------+
512 * 0 | RSS Hash / |SPH| HDR_LEN | RSV |Packet| RSS |
513 * | Packet | IP | | | | Type | Type |
514 * | Checksum | Ident | | | | | |
515 * +------------------------------------------------------+
516 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
517 * +------------------------------------------------------+
518 * 63 48 47 32 31 20 19 0
519 *
520 * 82599+ Advanced Receive Descriptor (Read) Format
521 * 63 1 0
522 * +-----------------------------------------------------+
523 * 0 | Packet Buffer Address [63:1] |A0/NSE|
524 * +----------------------------------------------+------+
525 * 8 | Header Buffer Address [63:1] | DD |
526 * +-----------------------------------------------------+
527 *
528 *
529 * 82599+ Advanced Receive Descriptor (Write-Back) Format
530 *
531 * 63 48 47 32 31 30 21 20 17 16 4 3 0
532 * +------------------------------------------------------+
533 * 0 |RSS / Frag Checksum|SPH| HDR_LEN |RSC- |Packet| RSS |
534 * |/ RTT / PCoE_PARAM | | | CNT | Type | Type |
535 * |/ Flow Dir Flt ID | | | | | |
536 * +------------------------------------------------------+
537 * 8 | VLAN Tag | Length |Extended Error| Xtnd Status/NEXTP |
538 * +------------------------------------------------------+
539 * 63 48 47 32 31 20 19 0
540 */
541
542 for (n = 0; n < adapter->num_rx_queues; n++) {
543 rx_ring = adapter->rx_ring[n];
544 pr_info("------------------------------------\n");
545 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index);
546 pr_info("------------------------------------\n");
547 pr_info("%s%s%s",
548 "R [desc] [ PktBuf A0] ",
549 "[ HeadBuf DD] [bi->dma ] [bi->skb ] ",
550 "<-- Adv Rx Read format\n");
551 pr_info("%s%s%s",
552 "RWB[desc] [PcsmIpSHl PtRs] ",
553 "[vl er S cks ln] ---------------- [bi->skb ] ",
554 "<-- Adv Rx Write-Back format\n");
555
556 for (i = 0; i < rx_ring->count; i++) {
557 rx_buffer_info = &rx_ring->rx_buffer_info[i];
558 rx_desc = IXGBE_RX_DESC(rx_ring, i);
559 u0 = (struct my_u0 *)rx_desc;
560 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
561 if (staterr & IXGBE_RXD_STAT_DD) {
562 /* Descriptor Done */
563 pr_info("RWB[0x%03X] %016llX "
564 "%016llX ---------------- %p", i,
565 le64_to_cpu(u0->a),
566 le64_to_cpu(u0->b),
567 rx_buffer_info->skb);
568 } else {
569 pr_info("R [0x%03X] %016llX "
570 "%016llX %016llX %p", i,
571 le64_to_cpu(u0->a),
572 le64_to_cpu(u0->b),
573 (u64)rx_buffer_info->dma,
574 rx_buffer_info->skb);
575
576 if (netif_msg_pktdata(adapter) &&
577 rx_buffer_info->dma) {
578 print_hex_dump(KERN_INFO, "",
579 DUMP_PREFIX_ADDRESS, 16, 1,
580 page_address(rx_buffer_info->page) +
581 rx_buffer_info->page_offset,
582 ixgbe_rx_bufsz(rx_ring), true);
583 }
584 }
585
586 if (i == rx_ring->next_to_use)
587 pr_cont(" NTU\n");
588 else if (i == rx_ring->next_to_clean)
589 pr_cont(" NTC\n");
590 else
591 pr_cont("\n");
592
593 }
594 }
595
596 exit:
597 return;
598 }
599
600 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
601 {
602 u32 ctrl_ext;
603
604 /* Let firmware take over control of h/w */
605 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
606 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
607 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
608 }
609
610 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
611 {
612 u32 ctrl_ext;
613
614 /* Let firmware know the driver has taken over */
615 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
616 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
617 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
618 }
619
620 /**
621 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
622 * @adapter: pointer to adapter struct
623 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
624 * @queue: queue to map the corresponding interrupt to
625 * @msix_vector: the vector to map to the corresponding queue
626 *
627 */
628 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
629 u8 queue, u8 msix_vector)
630 {
631 u32 ivar, index;
632 struct ixgbe_hw *hw = &adapter->hw;
633 switch (hw->mac.type) {
634 case ixgbe_mac_82598EB:
635 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
636 if (direction == -1)
637 direction = 0;
638 index = (((direction * 64) + queue) >> 2) & 0x1F;
639 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
640 ivar &= ~(0xFF << (8 * (queue & 0x3)));
641 ivar |= (msix_vector << (8 * (queue & 0x3)));
642 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
643 break;
644 case ixgbe_mac_82599EB:
645 case ixgbe_mac_X540:
646 if (direction == -1) {
647 /* other causes */
648 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
649 index = ((queue & 1) * 8);
650 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
651 ivar &= ~(0xFF << index);
652 ivar |= (msix_vector << index);
653 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
654 break;
655 } else {
656 /* tx or rx causes */
657 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
658 index = ((16 * (queue & 1)) + (8 * direction));
659 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
660 ivar &= ~(0xFF << index);
661 ivar |= (msix_vector << index);
662 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
663 break;
664 }
665 default:
666 break;
667 }
668 }
669
670 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
671 u64 qmask)
672 {
673 u32 mask;
674
675 switch (adapter->hw.mac.type) {
676 case ixgbe_mac_82598EB:
677 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
678 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
679 break;
680 case ixgbe_mac_82599EB:
681 case ixgbe_mac_X540:
682 mask = (qmask & 0xFFFFFFFF);
683 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
684 mask = (qmask >> 32);
685 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
686 break;
687 default:
688 break;
689 }
690 }
691
692 void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *ring,
693 struct ixgbe_tx_buffer *tx_buffer)
694 {
695 if (tx_buffer->skb) {
696 dev_kfree_skb_any(tx_buffer->skb);
697 if (dma_unmap_len(tx_buffer, len))
698 dma_unmap_single(ring->dev,
699 dma_unmap_addr(tx_buffer, dma),
700 dma_unmap_len(tx_buffer, len),
701 DMA_TO_DEVICE);
702 } else if (dma_unmap_len(tx_buffer, len)) {
703 dma_unmap_page(ring->dev,
704 dma_unmap_addr(tx_buffer, dma),
705 dma_unmap_len(tx_buffer, len),
706 DMA_TO_DEVICE);
707 }
708 tx_buffer->next_to_watch = NULL;
709 tx_buffer->skb = NULL;
710 dma_unmap_len_set(tx_buffer, len, 0);
711 /* tx_buffer must be completely set up in the transmit path */
712 }
713
714 static void ixgbe_update_xoff_rx_lfc(struct ixgbe_adapter *adapter)
715 {
716 struct ixgbe_hw *hw = &adapter->hw;
717 struct ixgbe_hw_stats *hwstats = &adapter->stats;
718 int i;
719 u32 data;
720
721 if ((hw->fc.current_mode != ixgbe_fc_full) &&
722 (hw->fc.current_mode != ixgbe_fc_rx_pause))
723 return;
724
725 switch (hw->mac.type) {
726 case ixgbe_mac_82598EB:
727 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
728 break;
729 default:
730 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
731 }
732 hwstats->lxoffrxc += data;
733
734 /* refill credits (no tx hang) if we received xoff */
735 if (!data)
736 return;
737
738 for (i = 0; i < adapter->num_tx_queues; i++)
739 clear_bit(__IXGBE_HANG_CHECK_ARMED,
740 &adapter->tx_ring[i]->state);
741 }
742
743 static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter)
744 {
745 struct ixgbe_hw *hw = &adapter->hw;
746 struct ixgbe_hw_stats *hwstats = &adapter->stats;
747 u32 xoff[8] = {0};
748 u8 tc;
749 int i;
750 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
751
752 if (adapter->ixgbe_ieee_pfc)
753 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
754
755 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED) || !pfc_en) {
756 ixgbe_update_xoff_rx_lfc(adapter);
757 return;
758 }
759
760 /* update stats for each tc, only valid with PFC enabled */
761 for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) {
762 u32 pxoffrxc;
763
764 switch (hw->mac.type) {
765 case ixgbe_mac_82598EB:
766 pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
767 break;
768 default:
769 pxoffrxc = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
770 }
771 hwstats->pxoffrxc[i] += pxoffrxc;
772 /* Get the TC for given UP */
773 tc = netdev_get_prio_tc_map(adapter->netdev, i);
774 xoff[tc] += pxoffrxc;
775 }
776
777 /* disarm tx queues that have received xoff frames */
778 for (i = 0; i < adapter->num_tx_queues; i++) {
779 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
780
781 tc = tx_ring->dcb_tc;
782 if (xoff[tc])
783 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
784 }
785 }
786
787 static u64 ixgbe_get_tx_completed(struct ixgbe_ring *ring)
788 {
789 return ring->stats.packets;
790 }
791
792 static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring)
793 {
794 struct ixgbe_adapter *adapter = netdev_priv(ring->netdev);
795 struct ixgbe_hw *hw = &adapter->hw;
796
797 u32 head = IXGBE_READ_REG(hw, IXGBE_TDH(ring->reg_idx));
798 u32 tail = IXGBE_READ_REG(hw, IXGBE_TDT(ring->reg_idx));
799
800 if (head != tail)
801 return (head < tail) ?
802 tail - head : (tail + ring->count - head);
803
804 return 0;
805 }
806
807 static inline bool ixgbe_check_tx_hang(struct ixgbe_ring *tx_ring)
808 {
809 u32 tx_done = ixgbe_get_tx_completed(tx_ring);
810 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
811 u32 tx_pending = ixgbe_get_tx_pending(tx_ring);
812 bool ret = false;
813
814 clear_check_for_tx_hang(tx_ring);
815
816 /*
817 * Check for a hung queue, but be thorough. This verifies
818 * that a transmit has been completed since the previous
819 * check AND there is at least one packet pending. The
820 * ARMED bit is set to indicate a potential hang. The
821 * bit is cleared if a pause frame is received to remove
822 * false hang detection due to PFC or 802.3x frames. By
823 * requiring this to fail twice we avoid races with
824 * pfc clearing the ARMED bit and conditions where we
825 * run the check_tx_hang logic with a transmit completion
826 * pending but without time to complete it yet.
827 */
828 if ((tx_done_old == tx_done) && tx_pending) {
829 /* make sure it is true for two checks in a row */
830 ret = test_and_set_bit(__IXGBE_HANG_CHECK_ARMED,
831 &tx_ring->state);
832 } else {
833 /* update completed stats and continue */
834 tx_ring->tx_stats.tx_done_old = tx_done;
835 /* reset the countdown */
836 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
837 }
838
839 return ret;
840 }
841
842 /**
843 * ixgbe_tx_timeout_reset - initiate reset due to Tx timeout
844 * @adapter: driver private struct
845 **/
846 static void ixgbe_tx_timeout_reset(struct ixgbe_adapter *adapter)
847 {
848
849 /* Do the reset outside of interrupt context */
850 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
851 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
852 e_warn(drv, "initiating reset due to tx timeout\n");
853 ixgbe_service_event_schedule(adapter);
854 }
855 }
856
857 /**
858 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
859 * @q_vector: structure containing interrupt and ring information
860 * @tx_ring: tx ring to clean
861 **/
862 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
863 struct ixgbe_ring *tx_ring)
864 {
865 struct ixgbe_adapter *adapter = q_vector->adapter;
866 struct ixgbe_tx_buffer *tx_buffer;
867 union ixgbe_adv_tx_desc *tx_desc;
868 unsigned int total_bytes = 0, total_packets = 0;
869 unsigned int budget = q_vector->tx.work_limit;
870 unsigned int i = tx_ring->next_to_clean;
871
872 if (test_bit(__IXGBE_DOWN, &adapter->state))
873 return true;
874
875 tx_buffer = &tx_ring->tx_buffer_info[i];
876 tx_desc = IXGBE_TX_DESC(tx_ring, i);
877 i -= tx_ring->count;
878
879 do {
880 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
881
882 /* if next_to_watch is not set then there is no work pending */
883 if (!eop_desc)
884 break;
885
886 /* prevent any other reads prior to eop_desc */
887 read_barrier_depends();
888
889 /* if DD is not set pending work has not been completed */
890 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
891 break;
892
893 /* clear next_to_watch to prevent false hangs */
894 tx_buffer->next_to_watch = NULL;
895
896 /* update the statistics for this packet */
897 total_bytes += tx_buffer->bytecount;
898 total_packets += tx_buffer->gso_segs;
899
900 /* free the skb */
901 dev_kfree_skb_any(tx_buffer->skb);
902
903 /* unmap skb header data */
904 dma_unmap_single(tx_ring->dev,
905 dma_unmap_addr(tx_buffer, dma),
906 dma_unmap_len(tx_buffer, len),
907 DMA_TO_DEVICE);
908
909 /* clear tx_buffer data */
910 tx_buffer->skb = NULL;
911 dma_unmap_len_set(tx_buffer, len, 0);
912
913 /* unmap remaining buffers */
914 while (tx_desc != eop_desc) {
915 tx_buffer++;
916 tx_desc++;
917 i++;
918 if (unlikely(!i)) {
919 i -= tx_ring->count;
920 tx_buffer = tx_ring->tx_buffer_info;
921 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
922 }
923
924 /* unmap any remaining paged data */
925 if (dma_unmap_len(tx_buffer, len)) {
926 dma_unmap_page(tx_ring->dev,
927 dma_unmap_addr(tx_buffer, dma),
928 dma_unmap_len(tx_buffer, len),
929 DMA_TO_DEVICE);
930 dma_unmap_len_set(tx_buffer, len, 0);
931 }
932 }
933
934 /* move us one more past the eop_desc for start of next pkt */
935 tx_buffer++;
936 tx_desc++;
937 i++;
938 if (unlikely(!i)) {
939 i -= tx_ring->count;
940 tx_buffer = tx_ring->tx_buffer_info;
941 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
942 }
943
944 /* issue prefetch for next Tx descriptor */
945 prefetch(tx_desc);
946
947 /* update budget accounting */
948 budget--;
949 } while (likely(budget));
950
951 i += tx_ring->count;
952 tx_ring->next_to_clean = i;
953 u64_stats_update_begin(&tx_ring->syncp);
954 tx_ring->stats.bytes += total_bytes;
955 tx_ring->stats.packets += total_packets;
956 u64_stats_update_end(&tx_ring->syncp);
957 q_vector->tx.total_bytes += total_bytes;
958 q_vector->tx.total_packets += total_packets;
959
960 if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring)) {
961 /* schedule immediate reset if we believe we hung */
962 struct ixgbe_hw *hw = &adapter->hw;
963 e_err(drv, "Detected Tx Unit Hang\n"
964 " Tx Queue <%d>\n"
965 " TDH, TDT <%x>, <%x>\n"
966 " next_to_use <%x>\n"
967 " next_to_clean <%x>\n"
968 "tx_buffer_info[next_to_clean]\n"
969 " time_stamp <%lx>\n"
970 " jiffies <%lx>\n",
971 tx_ring->queue_index,
972 IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)),
973 IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)),
974 tx_ring->next_to_use, i,
975 tx_ring->tx_buffer_info[i].time_stamp, jiffies);
976
977 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
978
979 e_info(probe,
980 "tx hang %d detected on queue %d, resetting adapter\n",
981 adapter->tx_timeout_count + 1, tx_ring->queue_index);
982
983 /* schedule immediate reset if we believe we hung */
984 ixgbe_tx_timeout_reset(adapter);
985
986 /* the adapter is about to reset, no point in enabling stuff */
987 return true;
988 }
989
990 netdev_tx_completed_queue(txring_txq(tx_ring),
991 total_packets, total_bytes);
992
993 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
994 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
995 (ixgbe_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
996 /* Make sure that anybody stopping the queue after this
997 * sees the new next_to_clean.
998 */
999 smp_mb();
1000 if (__netif_subqueue_stopped(tx_ring->netdev,
1001 tx_ring->queue_index)
1002 && !test_bit(__IXGBE_DOWN, &adapter->state)) {
1003 netif_wake_subqueue(tx_ring->netdev,
1004 tx_ring->queue_index);
1005 ++tx_ring->tx_stats.restart_queue;
1006 }
1007 }
1008
1009 return !!budget;
1010 }
1011
1012 #ifdef CONFIG_IXGBE_DCA
1013 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
1014 struct ixgbe_ring *tx_ring,
1015 int cpu)
1016 {
1017 struct ixgbe_hw *hw = &adapter->hw;
1018 u32 txctrl = dca3_get_tag(tx_ring->dev, cpu);
1019 u16 reg_offset;
1020
1021 switch (hw->mac.type) {
1022 case ixgbe_mac_82598EB:
1023 reg_offset = IXGBE_DCA_TXCTRL(tx_ring->reg_idx);
1024 break;
1025 case ixgbe_mac_82599EB:
1026 case ixgbe_mac_X540:
1027 reg_offset = IXGBE_DCA_TXCTRL_82599(tx_ring->reg_idx);
1028 txctrl <<= IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599;
1029 break;
1030 default:
1031 /* for unknown hardware do not write register */
1032 return;
1033 }
1034
1035 /*
1036 * We can enable relaxed ordering for reads, but not writes when
1037 * DCA is enabled. This is due to a known issue in some chipsets
1038 * which will cause the DCA tag to be cleared.
1039 */
1040 txctrl |= IXGBE_DCA_TXCTRL_DESC_RRO_EN |
1041 IXGBE_DCA_TXCTRL_DATA_RRO_EN |
1042 IXGBE_DCA_TXCTRL_DESC_DCA_EN;
1043
1044 IXGBE_WRITE_REG(hw, reg_offset, txctrl);
1045 }
1046
1047 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
1048 struct ixgbe_ring *rx_ring,
1049 int cpu)
1050 {
1051 struct ixgbe_hw *hw = &adapter->hw;
1052 u32 rxctrl = dca3_get_tag(rx_ring->dev, cpu);
1053 u8 reg_idx = rx_ring->reg_idx;
1054
1055
1056 switch (hw->mac.type) {
1057 case ixgbe_mac_82599EB:
1058 case ixgbe_mac_X540:
1059 rxctrl <<= IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599;
1060 break;
1061 default:
1062 break;
1063 }
1064
1065 /*
1066 * We can enable relaxed ordering for reads, but not writes when
1067 * DCA is enabled. This is due to a known issue in some chipsets
1068 * which will cause the DCA tag to be cleared.
1069 */
1070 rxctrl |= IXGBE_DCA_RXCTRL_DESC_RRO_EN |
1071 IXGBE_DCA_RXCTRL_DESC_DCA_EN;
1072
1073 IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl);
1074 }
1075
1076 static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
1077 {
1078 struct ixgbe_adapter *adapter = q_vector->adapter;
1079 struct ixgbe_ring *ring;
1080 int cpu = get_cpu();
1081
1082 if (q_vector->cpu == cpu)
1083 goto out_no_update;
1084
1085 ixgbe_for_each_ring(ring, q_vector->tx)
1086 ixgbe_update_tx_dca(adapter, ring, cpu);
1087
1088 ixgbe_for_each_ring(ring, q_vector->rx)
1089 ixgbe_update_rx_dca(adapter, ring, cpu);
1090
1091 q_vector->cpu = cpu;
1092 out_no_update:
1093 put_cpu();
1094 }
1095
1096 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
1097 {
1098 int i;
1099
1100 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
1101 return;
1102
1103 /* always use CB2 mode, difference is masked in the CB driver */
1104 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
1105
1106 for (i = 0; i < adapter->num_q_vectors; i++) {
1107 adapter->q_vector[i]->cpu = -1;
1108 ixgbe_update_dca(adapter->q_vector[i]);
1109 }
1110 }
1111
1112 static int __ixgbe_notify_dca(struct device *dev, void *data)
1113 {
1114 struct ixgbe_adapter *adapter = dev_get_drvdata(dev);
1115 unsigned long event = *(unsigned long *)data;
1116
1117 if (!(adapter->flags & IXGBE_FLAG_DCA_CAPABLE))
1118 return 0;
1119
1120 switch (event) {
1121 case DCA_PROVIDER_ADD:
1122 /* if we're already enabled, don't do it again */
1123 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1124 break;
1125 if (dca_add_requester(dev) == 0) {
1126 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
1127 ixgbe_setup_dca(adapter);
1128 break;
1129 }
1130 /* Fall Through since DCA is disabled. */
1131 case DCA_PROVIDER_REMOVE:
1132 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
1133 dca_remove_requester(dev);
1134 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
1135 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
1136 }
1137 break;
1138 }
1139
1140 return 0;
1141 }
1142
1143 #endif /* CONFIG_IXGBE_DCA */
1144 static inline void ixgbe_rx_hash(struct ixgbe_ring *ring,
1145 union ixgbe_adv_rx_desc *rx_desc,
1146 struct sk_buff *skb)
1147 {
1148 if (ring->netdev->features & NETIF_F_RXHASH)
1149 skb->rxhash = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
1150 }
1151
1152 #ifdef IXGBE_FCOE
1153 /**
1154 * ixgbe_rx_is_fcoe - check the rx desc for incoming pkt type
1155 * @ring: structure containing ring specific data
1156 * @rx_desc: advanced rx descriptor
1157 *
1158 * Returns : true if it is FCoE pkt
1159 */
1160 static inline bool ixgbe_rx_is_fcoe(struct ixgbe_ring *ring,
1161 union ixgbe_adv_rx_desc *rx_desc)
1162 {
1163 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1164
1165 return test_bit(__IXGBE_RX_FCOE, &ring->state) &&
1166 ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_ETQF_MASK)) ==
1167 (cpu_to_le16(IXGBE_ETQF_FILTER_FCOE <<
1168 IXGBE_RXDADV_PKTTYPE_ETQF_SHIFT)));
1169 }
1170
1171 #endif /* IXGBE_FCOE */
1172 /**
1173 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
1174 * @ring: structure containing ring specific data
1175 * @rx_desc: current Rx descriptor being processed
1176 * @skb: skb currently being received and modified
1177 **/
1178 static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
1179 union ixgbe_adv_rx_desc *rx_desc,
1180 struct sk_buff *skb)
1181 {
1182 skb_checksum_none_assert(skb);
1183
1184 /* Rx csum disabled */
1185 if (!(ring->netdev->features & NETIF_F_RXCSUM))
1186 return;
1187
1188 /* if IP and error */
1189 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
1190 ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
1191 ring->rx_stats.csum_err++;
1192 return;
1193 }
1194
1195 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
1196 return;
1197
1198 if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
1199 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1200
1201 /*
1202 * 82599 errata, UDP frames with a 0 checksum can be marked as
1203 * checksum errors.
1204 */
1205 if ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_UDP)) &&
1206 test_bit(__IXGBE_RX_CSUM_UDP_ZERO_ERR, &ring->state))
1207 return;
1208
1209 ring->rx_stats.csum_err++;
1210 return;
1211 }
1212
1213 /* It must be a TCP or UDP packet with a valid checksum */
1214 skb->ip_summed = CHECKSUM_UNNECESSARY;
1215 }
1216
1217 static inline void ixgbe_release_rx_desc(struct ixgbe_ring *rx_ring, u32 val)
1218 {
1219 rx_ring->next_to_use = val;
1220
1221 /* update next to alloc since we have filled the ring */
1222 rx_ring->next_to_alloc = val;
1223 /*
1224 * Force memory writes to complete before letting h/w
1225 * know there are new descriptors to fetch. (Only
1226 * applicable for weak-ordered memory model archs,
1227 * such as IA-64).
1228 */
1229 wmb();
1230 writel(val, rx_ring->tail);
1231 }
1232
1233 static bool ixgbe_alloc_mapped_page(struct ixgbe_ring *rx_ring,
1234 struct ixgbe_rx_buffer *bi)
1235 {
1236 struct page *page = bi->page;
1237 dma_addr_t dma = bi->dma;
1238
1239 /* since we are recycling buffers we should seldom need to alloc */
1240 if (likely(dma))
1241 return true;
1242
1243 /* alloc new page for storage */
1244 if (likely(!page)) {
1245 page = __skb_alloc_pages(GFP_ATOMIC | __GFP_COLD | __GFP_COMP,
1246 bi->skb, ixgbe_rx_pg_order(rx_ring));
1247 if (unlikely(!page)) {
1248 rx_ring->rx_stats.alloc_rx_page_failed++;
1249 return false;
1250 }
1251 bi->page = page;
1252 }
1253
1254 /* map page for use */
1255 dma = dma_map_page(rx_ring->dev, page, 0,
1256 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
1257
1258 /*
1259 * if mapping failed free memory back to system since
1260 * there isn't much point in holding memory we can't use
1261 */
1262 if (dma_mapping_error(rx_ring->dev, dma)) {
1263 __free_pages(page, ixgbe_rx_pg_order(rx_ring));
1264 bi->page = NULL;
1265
1266 rx_ring->rx_stats.alloc_rx_page_failed++;
1267 return false;
1268 }
1269
1270 bi->dma = dma;
1271 bi->page_offset = 0;
1272
1273 return true;
1274 }
1275
1276 /**
1277 * ixgbe_alloc_rx_buffers - Replace used receive buffers
1278 * @rx_ring: ring to place buffers on
1279 * @cleaned_count: number of buffers to replace
1280 **/
1281 void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count)
1282 {
1283 union ixgbe_adv_rx_desc *rx_desc;
1284 struct ixgbe_rx_buffer *bi;
1285 u16 i = rx_ring->next_to_use;
1286
1287 /* nothing to do */
1288 if (!cleaned_count)
1289 return;
1290
1291 rx_desc = IXGBE_RX_DESC(rx_ring, i);
1292 bi = &rx_ring->rx_buffer_info[i];
1293 i -= rx_ring->count;
1294
1295 do {
1296 if (!ixgbe_alloc_mapped_page(rx_ring, bi))
1297 break;
1298
1299 /*
1300 * Refresh the desc even if buffer_addrs didn't change
1301 * because each write-back erases this info.
1302 */
1303 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
1304
1305 rx_desc++;
1306 bi++;
1307 i++;
1308 if (unlikely(!i)) {
1309 rx_desc = IXGBE_RX_DESC(rx_ring, 0);
1310 bi = rx_ring->rx_buffer_info;
1311 i -= rx_ring->count;
1312 }
1313
1314 /* clear the hdr_addr for the next_to_use descriptor */
1315 rx_desc->read.hdr_addr = 0;
1316
1317 cleaned_count--;
1318 } while (cleaned_count);
1319
1320 i += rx_ring->count;
1321
1322 if (rx_ring->next_to_use != i)
1323 ixgbe_release_rx_desc(rx_ring, i);
1324 }
1325
1326 /**
1327 * ixgbe_get_headlen - determine size of header for RSC/LRO/GRO/FCOE
1328 * @data: pointer to the start of the headers
1329 * @max_len: total length of section to find headers in
1330 *
1331 * This function is meant to determine the length of headers that will
1332 * be recognized by hardware for LRO, GRO, and RSC offloads. The main
1333 * motivation of doing this is to only perform one pull for IPv4 TCP
1334 * packets so that we can do basic things like calculating the gso_size
1335 * based on the average data per packet.
1336 **/
1337 static unsigned int ixgbe_get_headlen(unsigned char *data,
1338 unsigned int max_len)
1339 {
1340 union {
1341 unsigned char *network;
1342 /* l2 headers */
1343 struct ethhdr *eth;
1344 struct vlan_hdr *vlan;
1345 /* l3 headers */
1346 struct iphdr *ipv4;
1347 struct ipv6hdr *ipv6;
1348 } hdr;
1349 __be16 protocol;
1350 u8 nexthdr = 0; /* default to not TCP */
1351 u8 hlen;
1352
1353 /* this should never happen, but better safe than sorry */
1354 if (max_len < ETH_HLEN)
1355 return max_len;
1356
1357 /* initialize network frame pointer */
1358 hdr.network = data;
1359
1360 /* set first protocol and move network header forward */
1361 protocol = hdr.eth->h_proto;
1362 hdr.network += ETH_HLEN;
1363
1364 /* handle any vlan tag if present */
1365 if (protocol == __constant_htons(ETH_P_8021Q)) {
1366 if ((hdr.network - data) > (max_len - VLAN_HLEN))
1367 return max_len;
1368
1369 protocol = hdr.vlan->h_vlan_encapsulated_proto;
1370 hdr.network += VLAN_HLEN;
1371 }
1372
1373 /* handle L3 protocols */
1374 if (protocol == __constant_htons(ETH_P_IP)) {
1375 if ((hdr.network - data) > (max_len - sizeof(struct iphdr)))
1376 return max_len;
1377
1378 /* access ihl as a u8 to avoid unaligned access on ia64 */
1379 hlen = (hdr.network[0] & 0x0F) << 2;
1380
1381 /* verify hlen meets minimum size requirements */
1382 if (hlen < sizeof(struct iphdr))
1383 return hdr.network - data;
1384
1385 /* record next protocol if header is present */
1386 if (!(hdr.ipv4->frag_off & htons(IP_OFFSET)))
1387 nexthdr = hdr.ipv4->protocol;
1388 } else if (protocol == __constant_htons(ETH_P_IPV6)) {
1389 if ((hdr.network - data) > (max_len - sizeof(struct ipv6hdr)))
1390 return max_len;
1391
1392 /* record next protocol */
1393 nexthdr = hdr.ipv6->nexthdr;
1394 hlen = sizeof(struct ipv6hdr);
1395 #ifdef IXGBE_FCOE
1396 } else if (protocol == __constant_htons(ETH_P_FCOE)) {
1397 if ((hdr.network - data) > (max_len - FCOE_HEADER_LEN))
1398 return max_len;
1399 hlen = FCOE_HEADER_LEN;
1400 #endif
1401 } else {
1402 return hdr.network - data;
1403 }
1404
1405 /* relocate pointer to start of L4 header */
1406 hdr.network += hlen;
1407
1408 /* finally sort out TCP/UDP */
1409 if (nexthdr == IPPROTO_TCP) {
1410 if ((hdr.network - data) > (max_len - sizeof(struct tcphdr)))
1411 return max_len;
1412
1413 /* access doff as a u8 to avoid unaligned access on ia64 */
1414 hlen = (hdr.network[12] & 0xF0) >> 2;
1415
1416 /* verify hlen meets minimum size requirements */
1417 if (hlen < sizeof(struct tcphdr))
1418 return hdr.network - data;
1419
1420 hdr.network += hlen;
1421 } else if (nexthdr == IPPROTO_UDP) {
1422 if ((hdr.network - data) > (max_len - sizeof(struct udphdr)))
1423 return max_len;
1424
1425 hdr.network += sizeof(struct udphdr);
1426 }
1427
1428 /*
1429 * If everything has gone correctly hdr.network should be the
1430 * data section of the packet and will be the end of the header.
1431 * If not then it probably represents the end of the last recognized
1432 * header.
1433 */
1434 if ((hdr.network - data) < max_len)
1435 return hdr.network - data;
1436 else
1437 return max_len;
1438 }
1439
1440 static void ixgbe_set_rsc_gso_size(struct ixgbe_ring *ring,
1441 struct sk_buff *skb)
1442 {
1443 u16 hdr_len = skb_headlen(skb);
1444
1445 /* set gso_size to avoid messing up TCP MSS */
1446 skb_shinfo(skb)->gso_size = DIV_ROUND_UP((skb->len - hdr_len),
1447 IXGBE_CB(skb)->append_cnt);
1448 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
1449 }
1450
1451 static void ixgbe_update_rsc_stats(struct ixgbe_ring *rx_ring,
1452 struct sk_buff *skb)
1453 {
1454 /* if append_cnt is 0 then frame is not RSC */
1455 if (!IXGBE_CB(skb)->append_cnt)
1456 return;
1457
1458 rx_ring->rx_stats.rsc_count += IXGBE_CB(skb)->append_cnt;
1459 rx_ring->rx_stats.rsc_flush++;
1460
1461 ixgbe_set_rsc_gso_size(rx_ring, skb);
1462
1463 /* gso_size is computed using append_cnt so always clear it last */
1464 IXGBE_CB(skb)->append_cnt = 0;
1465 }
1466
1467 /**
1468 * ixgbe_process_skb_fields - Populate skb header fields from Rx descriptor
1469 * @rx_ring: rx descriptor ring packet is being transacted on
1470 * @rx_desc: pointer to the EOP Rx descriptor
1471 * @skb: pointer to current skb being populated
1472 *
1473 * This function checks the ring, descriptor, and packet information in
1474 * order to populate the hash, checksum, VLAN, timestamp, protocol, and
1475 * other fields within the skb.
1476 **/
1477 static void ixgbe_process_skb_fields(struct ixgbe_ring *rx_ring,
1478 union ixgbe_adv_rx_desc *rx_desc,
1479 struct sk_buff *skb)
1480 {
1481 struct net_device *dev = rx_ring->netdev;
1482
1483 ixgbe_update_rsc_stats(rx_ring, skb);
1484
1485 ixgbe_rx_hash(rx_ring, rx_desc, skb);
1486
1487 ixgbe_rx_checksum(rx_ring, rx_desc, skb);
1488
1489 ixgbe_ptp_rx_hwtstamp(rx_ring, rx_desc, skb);
1490
1491 if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
1492 ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
1493 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
1494 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
1495 }
1496
1497 skb_record_rx_queue(skb, rx_ring->queue_index);
1498
1499 skb->protocol = eth_type_trans(skb, dev);
1500 }
1501
1502 static void ixgbe_rx_skb(struct ixgbe_q_vector *q_vector,
1503 struct sk_buff *skb)
1504 {
1505 struct ixgbe_adapter *adapter = q_vector->adapter;
1506
1507 if (ixgbe_qv_ll_polling(q_vector))
1508 netif_receive_skb(skb);
1509 else if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
1510 napi_gro_receive(&q_vector->napi, skb);
1511 else
1512 netif_rx(skb);
1513 }
1514
1515 /**
1516 * ixgbe_is_non_eop - process handling of non-EOP buffers
1517 * @rx_ring: Rx ring being processed
1518 * @rx_desc: Rx descriptor for current buffer
1519 * @skb: Current socket buffer containing buffer in progress
1520 *
1521 * This function updates next to clean. If the buffer is an EOP buffer
1522 * this function exits returning false, otherwise it will place the
1523 * sk_buff in the next buffer to be chained and return true indicating
1524 * that this is in fact a non-EOP buffer.
1525 **/
1526 static bool ixgbe_is_non_eop(struct ixgbe_ring *rx_ring,
1527 union ixgbe_adv_rx_desc *rx_desc,
1528 struct sk_buff *skb)
1529 {
1530 u32 ntc = rx_ring->next_to_clean + 1;
1531
1532 /* fetch, update, and store next to clean */
1533 ntc = (ntc < rx_ring->count) ? ntc : 0;
1534 rx_ring->next_to_clean = ntc;
1535
1536 prefetch(IXGBE_RX_DESC(rx_ring, ntc));
1537
1538 /* update RSC append count if present */
1539 if (ring_is_rsc_enabled(rx_ring)) {
1540 __le32 rsc_enabled = rx_desc->wb.lower.lo_dword.data &
1541 cpu_to_le32(IXGBE_RXDADV_RSCCNT_MASK);
1542
1543 if (unlikely(rsc_enabled)) {
1544 u32 rsc_cnt = le32_to_cpu(rsc_enabled);
1545
1546 rsc_cnt >>= IXGBE_RXDADV_RSCCNT_SHIFT;
1547 IXGBE_CB(skb)->append_cnt += rsc_cnt - 1;
1548
1549 /* update ntc based on RSC value */
1550 ntc = le32_to_cpu(rx_desc->wb.upper.status_error);
1551 ntc &= IXGBE_RXDADV_NEXTP_MASK;
1552 ntc >>= IXGBE_RXDADV_NEXTP_SHIFT;
1553 }
1554 }
1555
1556 /* if we are the last buffer then there is nothing else to do */
1557 if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
1558 return false;
1559
1560 /* place skb in next buffer to be received */
1561 rx_ring->rx_buffer_info[ntc].skb = skb;
1562 rx_ring->rx_stats.non_eop_descs++;
1563
1564 return true;
1565 }
1566
1567 /**
1568 * ixgbe_pull_tail - ixgbe specific version of skb_pull_tail
1569 * @rx_ring: rx descriptor ring packet is being transacted on
1570 * @skb: pointer to current skb being adjusted
1571 *
1572 * This function is an ixgbe specific version of __pskb_pull_tail. The
1573 * main difference between this version and the original function is that
1574 * this function can make several assumptions about the state of things
1575 * that allow for significant optimizations versus the standard function.
1576 * As a result we can do things like drop a frag and maintain an accurate
1577 * truesize for the skb.
1578 */
1579 static void ixgbe_pull_tail(struct ixgbe_ring *rx_ring,
1580 struct sk_buff *skb)
1581 {
1582 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
1583 unsigned char *va;
1584 unsigned int pull_len;
1585
1586 /*
1587 * it is valid to use page_address instead of kmap since we are
1588 * working with pages allocated out of the lomem pool per
1589 * alloc_page(GFP_ATOMIC)
1590 */
1591 va = skb_frag_address(frag);
1592
1593 /*
1594 * we need the header to contain the greater of either ETH_HLEN or
1595 * 60 bytes if the skb->len is less than 60 for skb_pad.
1596 */
1597 pull_len = ixgbe_get_headlen(va, IXGBE_RX_HDR_SIZE);
1598
1599 /* align pull length to size of long to optimize memcpy performance */
1600 skb_copy_to_linear_data(skb, va, ALIGN(pull_len, sizeof(long)));
1601
1602 /* update all of the pointers */
1603 skb_frag_size_sub(frag, pull_len);
1604 frag->page_offset += pull_len;
1605 skb->data_len -= pull_len;
1606 skb->tail += pull_len;
1607 }
1608
1609 /**
1610 * ixgbe_dma_sync_frag - perform DMA sync for first frag of SKB
1611 * @rx_ring: rx descriptor ring packet is being transacted on
1612 * @skb: pointer to current skb being updated
1613 *
1614 * This function provides a basic DMA sync up for the first fragment of an
1615 * skb. The reason for doing this is that the first fragment cannot be
1616 * unmapped until we have reached the end of packet descriptor for a buffer
1617 * chain.
1618 */
1619 static void ixgbe_dma_sync_frag(struct ixgbe_ring *rx_ring,
1620 struct sk_buff *skb)
1621 {
1622 /* if the page was released unmap it, else just sync our portion */
1623 if (unlikely(IXGBE_CB(skb)->page_released)) {
1624 dma_unmap_page(rx_ring->dev, IXGBE_CB(skb)->dma,
1625 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
1626 IXGBE_CB(skb)->page_released = false;
1627 } else {
1628 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
1629
1630 dma_sync_single_range_for_cpu(rx_ring->dev,
1631 IXGBE_CB(skb)->dma,
1632 frag->page_offset,
1633 ixgbe_rx_bufsz(rx_ring),
1634 DMA_FROM_DEVICE);
1635 }
1636 IXGBE_CB(skb)->dma = 0;
1637 }
1638
1639 /**
1640 * ixgbe_cleanup_headers - Correct corrupted or empty headers
1641 * @rx_ring: rx descriptor ring packet is being transacted on
1642 * @rx_desc: pointer to the EOP Rx descriptor
1643 * @skb: pointer to current skb being fixed
1644 *
1645 * Check for corrupted packet headers caused by senders on the local L2
1646 * embedded NIC switch not setting up their Tx Descriptors right. These
1647 * should be very rare.
1648 *
1649 * Also address the case where we are pulling data in on pages only
1650 * and as such no data is present in the skb header.
1651 *
1652 * In addition if skb is not at least 60 bytes we need to pad it so that
1653 * it is large enough to qualify as a valid Ethernet frame.
1654 *
1655 * Returns true if an error was encountered and skb was freed.
1656 **/
1657 static bool ixgbe_cleanup_headers(struct ixgbe_ring *rx_ring,
1658 union ixgbe_adv_rx_desc *rx_desc,
1659 struct sk_buff *skb)
1660 {
1661 struct net_device *netdev = rx_ring->netdev;
1662
1663 /* verify that the packet does not have any known errors */
1664 if (unlikely(ixgbe_test_staterr(rx_desc,
1665 IXGBE_RXDADV_ERR_FRAME_ERR_MASK) &&
1666 !(netdev->features & NETIF_F_RXALL))) {
1667 dev_kfree_skb_any(skb);
1668 return true;
1669 }
1670
1671 /* place header in linear portion of buffer */
1672 if (skb_is_nonlinear(skb))
1673 ixgbe_pull_tail(rx_ring, skb);
1674
1675 #ifdef IXGBE_FCOE
1676 /* do not attempt to pad FCoE Frames as this will disrupt DDP */
1677 if (ixgbe_rx_is_fcoe(rx_ring, rx_desc))
1678 return false;
1679
1680 #endif
1681 /* if skb_pad returns an error the skb was freed */
1682 if (unlikely(skb->len < 60)) {
1683 int pad_len = 60 - skb->len;
1684
1685 if (skb_pad(skb, pad_len))
1686 return true;
1687 __skb_put(skb, pad_len);
1688 }
1689
1690 return false;
1691 }
1692
1693 /**
1694 * ixgbe_reuse_rx_page - page flip buffer and store it back on the ring
1695 * @rx_ring: rx descriptor ring to store buffers on
1696 * @old_buff: donor buffer to have page reused
1697 *
1698 * Synchronizes page for reuse by the adapter
1699 **/
1700 static void ixgbe_reuse_rx_page(struct ixgbe_ring *rx_ring,
1701 struct ixgbe_rx_buffer *old_buff)
1702 {
1703 struct ixgbe_rx_buffer *new_buff;
1704 u16 nta = rx_ring->next_to_alloc;
1705
1706 new_buff = &rx_ring->rx_buffer_info[nta];
1707
1708 /* update, and store next to alloc */
1709 nta++;
1710 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
1711
1712 /* transfer page from old buffer to new buffer */
1713 new_buff->page = old_buff->page;
1714 new_buff->dma = old_buff->dma;
1715 new_buff->page_offset = old_buff->page_offset;
1716
1717 /* sync the buffer for use by the device */
1718 dma_sync_single_range_for_device(rx_ring->dev, new_buff->dma,
1719 new_buff->page_offset,
1720 ixgbe_rx_bufsz(rx_ring),
1721 DMA_FROM_DEVICE);
1722 }
1723
1724 /**
1725 * ixgbe_add_rx_frag - Add contents of Rx buffer to sk_buff
1726 * @rx_ring: rx descriptor ring to transact packets on
1727 * @rx_buffer: buffer containing page to add
1728 * @rx_desc: descriptor containing length of buffer written by hardware
1729 * @skb: sk_buff to place the data into
1730 *
1731 * This function will add the data contained in rx_buffer->page to the skb.
1732 * This is done either through a direct copy if the data in the buffer is
1733 * less than the skb header size, otherwise it will just attach the page as
1734 * a frag to the skb.
1735 *
1736 * The function will then update the page offset if necessary and return
1737 * true if the buffer can be reused by the adapter.
1738 **/
1739 static bool ixgbe_add_rx_frag(struct ixgbe_ring *rx_ring,
1740 struct ixgbe_rx_buffer *rx_buffer,
1741 union ixgbe_adv_rx_desc *rx_desc,
1742 struct sk_buff *skb)
1743 {
1744 struct page *page = rx_buffer->page;
1745 unsigned int size = le16_to_cpu(rx_desc->wb.upper.length);
1746 #if (PAGE_SIZE < 8192)
1747 unsigned int truesize = ixgbe_rx_bufsz(rx_ring);
1748 #else
1749 unsigned int truesize = ALIGN(size, L1_CACHE_BYTES);
1750 unsigned int last_offset = ixgbe_rx_pg_size(rx_ring) -
1751 ixgbe_rx_bufsz(rx_ring);
1752 #endif
1753
1754 if ((size <= IXGBE_RX_HDR_SIZE) && !skb_is_nonlinear(skb)) {
1755 unsigned char *va = page_address(page) + rx_buffer->page_offset;
1756
1757 memcpy(__skb_put(skb, size), va, ALIGN(size, sizeof(long)));
1758
1759 /* we can reuse buffer as-is, just make sure it is local */
1760 if (likely(page_to_nid(page) == numa_node_id()))
1761 return true;
1762
1763 /* this page cannot be reused so discard it */
1764 put_page(page);
1765 return false;
1766 }
1767
1768 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page,
1769 rx_buffer->page_offset, size, truesize);
1770
1771 /* avoid re-using remote pages */
1772 if (unlikely(page_to_nid(page) != numa_node_id()))
1773 return false;
1774
1775 #if (PAGE_SIZE < 8192)
1776 /* if we are only owner of page we can reuse it */
1777 if (unlikely(page_count(page) != 1))
1778 return false;
1779
1780 /* flip page offset to other buffer */
1781 rx_buffer->page_offset ^= truesize;
1782
1783 /*
1784 * since we are the only owner of the page and we need to
1785 * increment it, just set the value to 2 in order to avoid
1786 * an unecessary locked operation
1787 */
1788 atomic_set(&page->_count, 2);
1789 #else
1790 /* move offset up to the next cache line */
1791 rx_buffer->page_offset += truesize;
1792
1793 if (rx_buffer->page_offset > last_offset)
1794 return false;
1795
1796 /* bump ref count on page before it is given to the stack */
1797 get_page(page);
1798 #endif
1799
1800 return true;
1801 }
1802
1803 static struct sk_buff *ixgbe_fetch_rx_buffer(struct ixgbe_ring *rx_ring,
1804 union ixgbe_adv_rx_desc *rx_desc)
1805 {
1806 struct ixgbe_rx_buffer *rx_buffer;
1807 struct sk_buff *skb;
1808 struct page *page;
1809
1810 rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
1811 page = rx_buffer->page;
1812 prefetchw(page);
1813
1814 skb = rx_buffer->skb;
1815
1816 if (likely(!skb)) {
1817 void *page_addr = page_address(page) +
1818 rx_buffer->page_offset;
1819
1820 /* prefetch first cache line of first page */
1821 prefetch(page_addr);
1822 #if L1_CACHE_BYTES < 128
1823 prefetch(page_addr + L1_CACHE_BYTES);
1824 #endif
1825
1826 /* allocate a skb to store the frags */
1827 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
1828 IXGBE_RX_HDR_SIZE);
1829 if (unlikely(!skb)) {
1830 rx_ring->rx_stats.alloc_rx_buff_failed++;
1831 return NULL;
1832 }
1833
1834 /*
1835 * we will be copying header into skb->data in
1836 * pskb_may_pull so it is in our interest to prefetch
1837 * it now to avoid a possible cache miss
1838 */
1839 prefetchw(skb->data);
1840
1841 /*
1842 * Delay unmapping of the first packet. It carries the
1843 * header information, HW may still access the header
1844 * after the writeback. Only unmap it when EOP is
1845 * reached
1846 */
1847 if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
1848 goto dma_sync;
1849
1850 IXGBE_CB(skb)->dma = rx_buffer->dma;
1851 } else {
1852 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP))
1853 ixgbe_dma_sync_frag(rx_ring, skb);
1854
1855 dma_sync:
1856 /* we are reusing so sync this buffer for CPU use */
1857 dma_sync_single_range_for_cpu(rx_ring->dev,
1858 rx_buffer->dma,
1859 rx_buffer->page_offset,
1860 ixgbe_rx_bufsz(rx_ring),
1861 DMA_FROM_DEVICE);
1862 }
1863
1864 /* pull page into skb */
1865 if (ixgbe_add_rx_frag(rx_ring, rx_buffer, rx_desc, skb)) {
1866 /* hand second half of page back to the ring */
1867 ixgbe_reuse_rx_page(rx_ring, rx_buffer);
1868 } else if (IXGBE_CB(skb)->dma == rx_buffer->dma) {
1869 /* the page has been released from the ring */
1870 IXGBE_CB(skb)->page_released = true;
1871 } else {
1872 /* we are not reusing the buffer so unmap it */
1873 dma_unmap_page(rx_ring->dev, rx_buffer->dma,
1874 ixgbe_rx_pg_size(rx_ring),
1875 DMA_FROM_DEVICE);
1876 }
1877
1878 /* clear contents of buffer_info */
1879 rx_buffer->skb = NULL;
1880 rx_buffer->dma = 0;
1881 rx_buffer->page = NULL;
1882
1883 return skb;
1884 }
1885
1886 /**
1887 * ixgbe_clean_rx_irq - Clean completed descriptors from Rx ring - bounce buf
1888 * @q_vector: structure containing interrupt and ring information
1889 * @rx_ring: rx descriptor ring to transact packets on
1890 * @budget: Total limit on number of packets to process
1891 *
1892 * This function provides a "bounce buffer" approach to Rx interrupt
1893 * processing. The advantage to this is that on systems that have
1894 * expensive overhead for IOMMU access this provides a means of avoiding
1895 * it by maintaining the mapping of the page to the syste.
1896 *
1897 * Returns amount of work completed
1898 **/
1899 static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
1900 struct ixgbe_ring *rx_ring,
1901 const int budget)
1902 {
1903 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1904 #ifdef IXGBE_FCOE
1905 struct ixgbe_adapter *adapter = q_vector->adapter;
1906 int ddp_bytes;
1907 unsigned int mss = 0;
1908 #endif /* IXGBE_FCOE */
1909 u16 cleaned_count = ixgbe_desc_unused(rx_ring);
1910
1911 do {
1912 union ixgbe_adv_rx_desc *rx_desc;
1913 struct sk_buff *skb;
1914
1915 /* return some buffers to hardware, one at a time is too slow */
1916 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
1917 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1918 cleaned_count = 0;
1919 }
1920
1921 rx_desc = IXGBE_RX_DESC(rx_ring, rx_ring->next_to_clean);
1922
1923 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_DD))
1924 break;
1925
1926 /*
1927 * This memory barrier is needed to keep us from reading
1928 * any other fields out of the rx_desc until we know the
1929 * RXD_STAT_DD bit is set
1930 */
1931 rmb();
1932
1933 /* retrieve a buffer from the ring */
1934 skb = ixgbe_fetch_rx_buffer(rx_ring, rx_desc);
1935
1936 /* exit if we failed to retrieve a buffer */
1937 if (!skb)
1938 break;
1939
1940 cleaned_count++;
1941
1942 /* place incomplete frames back on ring for completion */
1943 if (ixgbe_is_non_eop(rx_ring, rx_desc, skb))
1944 continue;
1945
1946 /* verify the packet layout is correct */
1947 if (ixgbe_cleanup_headers(rx_ring, rx_desc, skb))
1948 continue;
1949
1950 /* probably a little skewed due to removing CRC */
1951 total_rx_bytes += skb->len;
1952
1953 /* populate checksum, timestamp, VLAN, and protocol */
1954 ixgbe_process_skb_fields(rx_ring, rx_desc, skb);
1955
1956 #ifdef IXGBE_FCOE
1957 /* if ddp, not passing to ULD unless for FCP_RSP or error */
1958 if (ixgbe_rx_is_fcoe(rx_ring, rx_desc)) {
1959 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
1960 /* include DDPed FCoE data */
1961 if (ddp_bytes > 0) {
1962 if (!mss) {
1963 mss = rx_ring->netdev->mtu -
1964 sizeof(struct fcoe_hdr) -
1965 sizeof(struct fc_frame_header) -
1966 sizeof(struct fcoe_crc_eof);
1967 if (mss > 512)
1968 mss &= ~511;
1969 }
1970 total_rx_bytes += ddp_bytes;
1971 total_rx_packets += DIV_ROUND_UP(ddp_bytes,
1972 mss);
1973 }
1974 if (!ddp_bytes) {
1975 dev_kfree_skb_any(skb);
1976 continue;
1977 }
1978 }
1979
1980 #endif /* IXGBE_FCOE */
1981 skb_mark_napi_id(skb, &q_vector->napi);
1982 ixgbe_rx_skb(q_vector, skb);
1983
1984 /* update budget accounting */
1985 total_rx_packets++;
1986 } while (likely(total_rx_packets < budget));
1987
1988 u64_stats_update_begin(&rx_ring->syncp);
1989 rx_ring->stats.packets += total_rx_packets;
1990 rx_ring->stats.bytes += total_rx_bytes;
1991 u64_stats_update_end(&rx_ring->syncp);
1992 q_vector->rx.total_packets += total_rx_packets;
1993 q_vector->rx.total_bytes += total_rx_bytes;
1994
1995 if (cleaned_count)
1996 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1997
1998 return total_rx_packets;
1999 }
2000
2001 #ifdef CONFIG_NET_LL_RX_POLL
2002 /* must be called with local_bh_disable()d */
2003 static int ixgbe_low_latency_recv(struct napi_struct *napi)
2004 {
2005 struct ixgbe_q_vector *q_vector =
2006 container_of(napi, struct ixgbe_q_vector, napi);
2007 struct ixgbe_adapter *adapter = q_vector->adapter;
2008 struct ixgbe_ring *ring;
2009 int found = 0;
2010
2011 if (test_bit(__IXGBE_DOWN, &adapter->state))
2012 return LL_FLUSH_FAILED;
2013
2014 if (!ixgbe_qv_lock_poll(q_vector))
2015 return LL_FLUSH_BUSY;
2016
2017 ixgbe_for_each_ring(ring, q_vector->rx) {
2018 found = ixgbe_clean_rx_irq(q_vector, ring, 4);
2019 #ifdef LL_EXTENDED_STATS
2020 if (found)
2021 ring->stats.cleaned += found;
2022 else
2023 ring->stats.misses++;
2024 #endif
2025 if (found)
2026 break;
2027 }
2028
2029 ixgbe_qv_unlock_poll(q_vector);
2030
2031 return found;
2032 }
2033 #endif /* CONFIG_NET_LL_RX_POLL */
2034
2035 /**
2036 * ixgbe_configure_msix - Configure MSI-X hardware
2037 * @adapter: board private structure
2038 *
2039 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
2040 * interrupts.
2041 **/
2042 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
2043 {
2044 struct ixgbe_q_vector *q_vector;
2045 int v_idx;
2046 u32 mask;
2047
2048 /* Populate MSIX to EITR Select */
2049 if (adapter->num_vfs > 32) {
2050 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
2051 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
2052 }
2053
2054 /*
2055 * Populate the IVAR table and set the ITR values to the
2056 * corresponding register.
2057 */
2058 for (v_idx = 0; v_idx < adapter->num_q_vectors; v_idx++) {
2059 struct ixgbe_ring *ring;
2060 q_vector = adapter->q_vector[v_idx];
2061
2062 ixgbe_for_each_ring(ring, q_vector->rx)
2063 ixgbe_set_ivar(adapter, 0, ring->reg_idx, v_idx);
2064
2065 ixgbe_for_each_ring(ring, q_vector->tx)
2066 ixgbe_set_ivar(adapter, 1, ring->reg_idx, v_idx);
2067
2068 ixgbe_write_eitr(q_vector);
2069 }
2070
2071 switch (adapter->hw.mac.type) {
2072 case ixgbe_mac_82598EB:
2073 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
2074 v_idx);
2075 break;
2076 case ixgbe_mac_82599EB:
2077 case ixgbe_mac_X540:
2078 ixgbe_set_ivar(adapter, -1, 1, v_idx);
2079 break;
2080 default:
2081 break;
2082 }
2083 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
2084
2085 /* set up to autoclear timer, and the vectors */
2086 mask = IXGBE_EIMS_ENABLE_MASK;
2087 mask &= ~(IXGBE_EIMS_OTHER |
2088 IXGBE_EIMS_MAILBOX |
2089 IXGBE_EIMS_LSC);
2090
2091 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
2092 }
2093
2094 enum latency_range {
2095 lowest_latency = 0,
2096 low_latency = 1,
2097 bulk_latency = 2,
2098 latency_invalid = 255
2099 };
2100
2101 /**
2102 * ixgbe_update_itr - update the dynamic ITR value based on statistics
2103 * @q_vector: structure containing interrupt and ring information
2104 * @ring_container: structure containing ring performance data
2105 *
2106 * Stores a new ITR value based on packets and byte
2107 * counts during the last interrupt. The advantage of per interrupt
2108 * computation is faster updates and more accurate ITR for the current
2109 * traffic pattern. Constants in this function were computed
2110 * based on theoretical maximum wire speed and thresholds were set based
2111 * on testing data as well as attempting to minimize response time
2112 * while increasing bulk throughput.
2113 * this functionality is controlled by the InterruptThrottleRate module
2114 * parameter (see ixgbe_param.c)
2115 **/
2116 static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
2117 struct ixgbe_ring_container *ring_container)
2118 {
2119 int bytes = ring_container->total_bytes;
2120 int packets = ring_container->total_packets;
2121 u32 timepassed_us;
2122 u64 bytes_perint;
2123 u8 itr_setting = ring_container->itr;
2124
2125 if (packets == 0)
2126 return;
2127
2128 /* simple throttlerate management
2129 * 0-10MB/s lowest (100000 ints/s)
2130 * 10-20MB/s low (20000 ints/s)
2131 * 20-1249MB/s bulk (8000 ints/s)
2132 */
2133 /* what was last interrupt timeslice? */
2134 timepassed_us = q_vector->itr >> 2;
2135 if (timepassed_us == 0)
2136 return;
2137
2138 bytes_perint = bytes / timepassed_us; /* bytes/usec */
2139
2140 switch (itr_setting) {
2141 case lowest_latency:
2142 if (bytes_perint > 10)
2143 itr_setting = low_latency;
2144 break;
2145 case low_latency:
2146 if (bytes_perint > 20)
2147 itr_setting = bulk_latency;
2148 else if (bytes_perint <= 10)
2149 itr_setting = lowest_latency;
2150 break;
2151 case bulk_latency:
2152 if (bytes_perint <= 20)
2153 itr_setting = low_latency;
2154 break;
2155 }
2156
2157 /* clear work counters since we have the values we need */
2158 ring_container->total_bytes = 0;
2159 ring_container->total_packets = 0;
2160
2161 /* write updated itr to ring container */
2162 ring_container->itr = itr_setting;
2163 }
2164
2165 /**
2166 * ixgbe_write_eitr - write EITR register in hardware specific way
2167 * @q_vector: structure containing interrupt and ring information
2168 *
2169 * This function is made to be called by ethtool and by the driver
2170 * when it needs to update EITR registers at runtime. Hardware
2171 * specific quirks/differences are taken care of here.
2172 */
2173 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
2174 {
2175 struct ixgbe_adapter *adapter = q_vector->adapter;
2176 struct ixgbe_hw *hw = &adapter->hw;
2177 int v_idx = q_vector->v_idx;
2178 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
2179
2180 switch (adapter->hw.mac.type) {
2181 case ixgbe_mac_82598EB:
2182 /* must write high and low 16 bits to reset counter */
2183 itr_reg |= (itr_reg << 16);
2184 break;
2185 case ixgbe_mac_82599EB:
2186 case ixgbe_mac_X540:
2187 /*
2188 * set the WDIS bit to not clear the timer bits and cause an
2189 * immediate assertion of the interrupt
2190 */
2191 itr_reg |= IXGBE_EITR_CNT_WDIS;
2192 break;
2193 default:
2194 break;
2195 }
2196 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
2197 }
2198
2199 static void ixgbe_set_itr(struct ixgbe_q_vector *q_vector)
2200 {
2201 u32 new_itr = q_vector->itr;
2202 u8 current_itr;
2203
2204 ixgbe_update_itr(q_vector, &q_vector->tx);
2205 ixgbe_update_itr(q_vector, &q_vector->rx);
2206
2207 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
2208
2209 switch (current_itr) {
2210 /* counts and packets in update_itr are dependent on these numbers */
2211 case lowest_latency:
2212 new_itr = IXGBE_100K_ITR;
2213 break;
2214 case low_latency:
2215 new_itr = IXGBE_20K_ITR;
2216 break;
2217 case bulk_latency:
2218 new_itr = IXGBE_8K_ITR;
2219 break;
2220 default:
2221 break;
2222 }
2223
2224 if (new_itr != q_vector->itr) {
2225 /* do an exponential smoothing */
2226 new_itr = (10 * new_itr * q_vector->itr) /
2227 ((9 * new_itr) + q_vector->itr);
2228
2229 /* save the algorithm value here */
2230 q_vector->itr = new_itr;
2231
2232 ixgbe_write_eitr(q_vector);
2233 }
2234 }
2235
2236 /**
2237 * ixgbe_check_overtemp_subtask - check for over temperature
2238 * @adapter: pointer to adapter
2239 **/
2240 static void ixgbe_check_overtemp_subtask(struct ixgbe_adapter *adapter)
2241 {
2242 struct ixgbe_hw *hw = &adapter->hw;
2243 u32 eicr = adapter->interrupt_event;
2244
2245 if (test_bit(__IXGBE_DOWN, &adapter->state))
2246 return;
2247
2248 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
2249 !(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_EVENT))
2250 return;
2251
2252 adapter->flags2 &= ~IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2253
2254 switch (hw->device_id) {
2255 case IXGBE_DEV_ID_82599_T3_LOM:
2256 /*
2257 * Since the warning interrupt is for both ports
2258 * we don't have to check if:
2259 * - This interrupt wasn't for our port.
2260 * - We may have missed the interrupt so always have to
2261 * check if we got a LSC
2262 */
2263 if (!(eicr & IXGBE_EICR_GPI_SDP0) &&
2264 !(eicr & IXGBE_EICR_LSC))
2265 return;
2266
2267 if (!(eicr & IXGBE_EICR_LSC) && hw->mac.ops.check_link) {
2268 u32 speed;
2269 bool link_up = false;
2270
2271 hw->mac.ops.check_link(hw, &speed, &link_up, false);
2272
2273 if (link_up)
2274 return;
2275 }
2276
2277 /* Check if this is not due to overtemp */
2278 if (hw->phy.ops.check_overtemp(hw) != IXGBE_ERR_OVERTEMP)
2279 return;
2280
2281 break;
2282 default:
2283 if (!(eicr & IXGBE_EICR_GPI_SDP0))
2284 return;
2285 break;
2286 }
2287 e_crit(drv,
2288 "Network adapter has been stopped because it has over heated. "
2289 "Restart the computer. If the problem persists, "
2290 "power off the system and replace the adapter\n");
2291
2292 adapter->interrupt_event = 0;
2293 }
2294
2295 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
2296 {
2297 struct ixgbe_hw *hw = &adapter->hw;
2298
2299 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
2300 (eicr & IXGBE_EICR_GPI_SDP1)) {
2301 e_crit(probe, "Fan has stopped, replace the adapter\n");
2302 /* write to clear the interrupt */
2303 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
2304 }
2305 }
2306
2307 static void ixgbe_check_overtemp_event(struct ixgbe_adapter *adapter, u32 eicr)
2308 {
2309 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE))
2310 return;
2311
2312 switch (adapter->hw.mac.type) {
2313 case ixgbe_mac_82599EB:
2314 /*
2315 * Need to check link state so complete overtemp check
2316 * on service task
2317 */
2318 if (((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)) &&
2319 (!test_bit(__IXGBE_DOWN, &adapter->state))) {
2320 adapter->interrupt_event = eicr;
2321 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2322 ixgbe_service_event_schedule(adapter);
2323 return;
2324 }
2325 return;
2326 case ixgbe_mac_X540:
2327 if (!(eicr & IXGBE_EICR_TS))
2328 return;
2329 break;
2330 default:
2331 return;
2332 }
2333
2334 e_crit(drv,
2335 "Network adapter has been stopped because it has over heated. "
2336 "Restart the computer. If the problem persists, "
2337 "power off the system and replace the adapter\n");
2338 }
2339
2340 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
2341 {
2342 struct ixgbe_hw *hw = &adapter->hw;
2343
2344 if (eicr & IXGBE_EICR_GPI_SDP2) {
2345 /* Clear the interrupt */
2346 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
2347 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2348 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
2349 ixgbe_service_event_schedule(adapter);
2350 }
2351 }
2352
2353 if (eicr & IXGBE_EICR_GPI_SDP1) {
2354 /* Clear the interrupt */
2355 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
2356 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2357 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
2358 ixgbe_service_event_schedule(adapter);
2359 }
2360 }
2361 }
2362
2363 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
2364 {
2365 struct ixgbe_hw *hw = &adapter->hw;
2366
2367 adapter->lsc_int++;
2368 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2369 adapter->link_check_timeout = jiffies;
2370 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2371 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
2372 IXGBE_WRITE_FLUSH(hw);
2373 ixgbe_service_event_schedule(adapter);
2374 }
2375 }
2376
2377 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
2378 u64 qmask)
2379 {
2380 u32 mask;
2381 struct ixgbe_hw *hw = &adapter->hw;
2382
2383 switch (hw->mac.type) {
2384 case ixgbe_mac_82598EB:
2385 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
2386 IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
2387 break;
2388 case ixgbe_mac_82599EB:
2389 case ixgbe_mac_X540:
2390 mask = (qmask & 0xFFFFFFFF);
2391 if (mask)
2392 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
2393 mask = (qmask >> 32);
2394 if (mask)
2395 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
2396 break;
2397 default:
2398 break;
2399 }
2400 /* skip the flush */
2401 }
2402
2403 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
2404 u64 qmask)
2405 {
2406 u32 mask;
2407 struct ixgbe_hw *hw = &adapter->hw;
2408
2409 switch (hw->mac.type) {
2410 case ixgbe_mac_82598EB:
2411 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
2412 IXGBE_WRITE_REG(hw, IXGBE_EIMC, mask);
2413 break;
2414 case ixgbe_mac_82599EB:
2415 case ixgbe_mac_X540:
2416 mask = (qmask & 0xFFFFFFFF);
2417 if (mask)
2418 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(0), mask);
2419 mask = (qmask >> 32);
2420 if (mask)
2421 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(1), mask);
2422 break;
2423 default:
2424 break;
2425 }
2426 /* skip the flush */
2427 }
2428
2429 /**
2430 * ixgbe_irq_enable - Enable default interrupt generation settings
2431 * @adapter: board private structure
2432 **/
2433 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
2434 bool flush)
2435 {
2436 u32 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
2437
2438 /* don't reenable LSC while waiting for link */
2439 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
2440 mask &= ~IXGBE_EIMS_LSC;
2441
2442 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
2443 switch (adapter->hw.mac.type) {
2444 case ixgbe_mac_82599EB:
2445 mask |= IXGBE_EIMS_GPI_SDP0;
2446 break;
2447 case ixgbe_mac_X540:
2448 mask |= IXGBE_EIMS_TS;
2449 break;
2450 default:
2451 break;
2452 }
2453 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
2454 mask |= IXGBE_EIMS_GPI_SDP1;
2455 switch (adapter->hw.mac.type) {
2456 case ixgbe_mac_82599EB:
2457 mask |= IXGBE_EIMS_GPI_SDP1;
2458 mask |= IXGBE_EIMS_GPI_SDP2;
2459 case ixgbe_mac_X540:
2460 mask |= IXGBE_EIMS_ECC;
2461 mask |= IXGBE_EIMS_MAILBOX;
2462 break;
2463 default:
2464 break;
2465 }
2466
2467 if (adapter->hw.mac.type == ixgbe_mac_X540)
2468 mask |= IXGBE_EIMS_TIMESYNC;
2469
2470 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
2471 !(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
2472 mask |= IXGBE_EIMS_FLOW_DIR;
2473
2474 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
2475 if (queues)
2476 ixgbe_irq_enable_queues(adapter, ~0);
2477 if (flush)
2478 IXGBE_WRITE_FLUSH(&adapter->hw);
2479 }
2480
2481 static irqreturn_t ixgbe_msix_other(int irq, void *data)
2482 {
2483 struct ixgbe_adapter *adapter = data;
2484 struct ixgbe_hw *hw = &adapter->hw;
2485 u32 eicr;
2486
2487 /*
2488 * Workaround for Silicon errata. Use clear-by-write instead
2489 * of clear-by-read. Reading with EICS will return the
2490 * interrupt causes without clearing, which later be done
2491 * with the write to EICR.
2492 */
2493 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
2494
2495 /* The lower 16bits of the EICR register are for the queue interrupts
2496 * which should be masked here in order to not accidently clear them if
2497 * the bits are high when ixgbe_msix_other is called. There is a race
2498 * condition otherwise which results in possible performance loss
2499 * especially if the ixgbe_msix_other interrupt is triggering
2500 * consistently (as it would when PPS is turned on for the X540 device)
2501 */
2502 eicr &= 0xFFFF0000;
2503
2504 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
2505
2506 if (eicr & IXGBE_EICR_LSC)
2507 ixgbe_check_lsc(adapter);
2508
2509 if (eicr & IXGBE_EICR_MAILBOX)
2510 ixgbe_msg_task(adapter);
2511
2512 switch (hw->mac.type) {
2513 case ixgbe_mac_82599EB:
2514 case ixgbe_mac_X540:
2515 if (eicr & IXGBE_EICR_ECC)
2516 e_info(link, "Received unrecoverable ECC Err, please "
2517 "reboot\n");
2518 /* Handle Flow Director Full threshold interrupt */
2519 if (eicr & IXGBE_EICR_FLOW_DIR) {
2520 int reinit_count = 0;
2521 int i;
2522 for (i = 0; i < adapter->num_tx_queues; i++) {
2523 struct ixgbe_ring *ring = adapter->tx_ring[i];
2524 if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE,
2525 &ring->state))
2526 reinit_count++;
2527 }
2528 if (reinit_count) {
2529 /* no more flow director interrupts until after init */
2530 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_FLOW_DIR);
2531 adapter->flags2 |= IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
2532 ixgbe_service_event_schedule(adapter);
2533 }
2534 }
2535 ixgbe_check_sfp_event(adapter, eicr);
2536 ixgbe_check_overtemp_event(adapter, eicr);
2537 break;
2538 default:
2539 break;
2540 }
2541
2542 ixgbe_check_fan_failure(adapter, eicr);
2543
2544 if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
2545 ixgbe_ptp_check_pps_event(adapter, eicr);
2546
2547 /* re-enable the original interrupt state, no lsc, no queues */
2548 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2549 ixgbe_irq_enable(adapter, false, false);
2550
2551 return IRQ_HANDLED;
2552 }
2553
2554 static irqreturn_t ixgbe_msix_clean_rings(int irq, void *data)
2555 {
2556 struct ixgbe_q_vector *q_vector = data;
2557
2558 /* EIAM disabled interrupts (on this vector) for us */
2559
2560 if (q_vector->rx.ring || q_vector->tx.ring)
2561 napi_schedule(&q_vector->napi);
2562
2563 return IRQ_HANDLED;
2564 }
2565
2566 /**
2567 * ixgbe_poll - NAPI Rx polling callback
2568 * @napi: structure for representing this polling device
2569 * @budget: how many packets driver is allowed to clean
2570 *
2571 * This function is used for legacy and MSI, NAPI mode
2572 **/
2573 int ixgbe_poll(struct napi_struct *napi, int budget)
2574 {
2575 struct ixgbe_q_vector *q_vector =
2576 container_of(napi, struct ixgbe_q_vector, napi);
2577 struct ixgbe_adapter *adapter = q_vector->adapter;
2578 struct ixgbe_ring *ring;
2579 int per_ring_budget;
2580 bool clean_complete = true;
2581
2582 #ifdef CONFIG_IXGBE_DCA
2583 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2584 ixgbe_update_dca(q_vector);
2585 #endif
2586
2587 ixgbe_for_each_ring(ring, q_vector->tx)
2588 clean_complete &= !!ixgbe_clean_tx_irq(q_vector, ring);
2589
2590 if (!ixgbe_qv_lock_napi(q_vector))
2591 return budget;
2592
2593 /* attempt to distribute budget to each queue fairly, but don't allow
2594 * the budget to go below 1 because we'll exit polling */
2595 if (q_vector->rx.count > 1)
2596 per_ring_budget = max(budget/q_vector->rx.count, 1);
2597 else
2598 per_ring_budget = budget;
2599
2600 ixgbe_for_each_ring(ring, q_vector->rx)
2601 clean_complete &= (ixgbe_clean_rx_irq(q_vector, ring,
2602 per_ring_budget) < per_ring_budget);
2603
2604 ixgbe_qv_unlock_napi(q_vector);
2605 /* If all work not completed, return budget and keep polling */
2606 if (!clean_complete)
2607 return budget;
2608
2609 /* all work done, exit the polling mode */
2610 napi_complete(napi);
2611 if (adapter->rx_itr_setting & 1)
2612 ixgbe_set_itr(q_vector);
2613 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2614 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
2615
2616 return 0;
2617 }
2618
2619 /**
2620 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2621 * @adapter: board private structure
2622 *
2623 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2624 * interrupts from the kernel.
2625 **/
2626 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2627 {
2628 struct net_device *netdev = adapter->netdev;
2629 int vector, err;
2630 int ri = 0, ti = 0;
2631
2632 for (vector = 0; vector < adapter->num_q_vectors; vector++) {
2633 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
2634 struct msix_entry *entry = &adapter->msix_entries[vector];
2635
2636 if (q_vector->tx.ring && q_vector->rx.ring) {
2637 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2638 "%s-%s-%d", netdev->name, "TxRx", ri++);
2639 ti++;
2640 } else if (q_vector->rx.ring) {
2641 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2642 "%s-%s-%d", netdev->name, "rx", ri++);
2643 } else if (q_vector->tx.ring) {
2644 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2645 "%s-%s-%d", netdev->name, "tx", ti++);
2646 } else {
2647 /* skip this unused q_vector */
2648 continue;
2649 }
2650 err = request_irq(entry->vector, &ixgbe_msix_clean_rings, 0,
2651 q_vector->name, q_vector);
2652 if (err) {
2653 e_err(probe, "request_irq failed for MSIX interrupt "
2654 "Error: %d\n", err);
2655 goto free_queue_irqs;
2656 }
2657 /* If Flow Director is enabled, set interrupt affinity */
2658 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2659 /* assign the mask for this irq */
2660 irq_set_affinity_hint(entry->vector,
2661 &q_vector->affinity_mask);
2662 }
2663 }
2664
2665 err = request_irq(adapter->msix_entries[vector].vector,
2666 ixgbe_msix_other, 0, netdev->name, adapter);
2667 if (err) {
2668 e_err(probe, "request_irq for msix_other failed: %d\n", err);
2669 goto free_queue_irqs;
2670 }
2671
2672 return 0;
2673
2674 free_queue_irqs:
2675 while (vector) {
2676 vector--;
2677 irq_set_affinity_hint(adapter->msix_entries[vector].vector,
2678 NULL);
2679 free_irq(adapter->msix_entries[vector].vector,
2680 adapter->q_vector[vector]);
2681 }
2682 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2683 pci_disable_msix(adapter->pdev);
2684 kfree(adapter->msix_entries);
2685 adapter->msix_entries = NULL;
2686 return err;
2687 }
2688
2689 /**
2690 * ixgbe_intr - legacy mode Interrupt Handler
2691 * @irq: interrupt number
2692 * @data: pointer to a network interface device structure
2693 **/
2694 static irqreturn_t ixgbe_intr(int irq, void *data)
2695 {
2696 struct ixgbe_adapter *adapter = data;
2697 struct ixgbe_hw *hw = &adapter->hw;
2698 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2699 u32 eicr;
2700
2701 /*
2702 * Workaround for silicon errata #26 on 82598. Mask the interrupt
2703 * before the read of EICR.
2704 */
2705 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2706
2707 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2708 * therefore no explicit interrupt disable is necessary */
2709 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2710 if (!eicr) {
2711 /*
2712 * shared interrupt alert!
2713 * make sure interrupts are enabled because the read will
2714 * have disabled interrupts due to EIAM
2715 * finish the workaround of silicon errata on 82598. Unmask
2716 * the interrupt that we masked before the EICR read.
2717 */
2718 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2719 ixgbe_irq_enable(adapter, true, true);
2720 return IRQ_NONE; /* Not our interrupt */
2721 }
2722
2723 if (eicr & IXGBE_EICR_LSC)
2724 ixgbe_check_lsc(adapter);
2725
2726 switch (hw->mac.type) {
2727 case ixgbe_mac_82599EB:
2728 ixgbe_check_sfp_event(adapter, eicr);
2729 /* Fall through */
2730 case ixgbe_mac_X540:
2731 if (eicr & IXGBE_EICR_ECC)
2732 e_info(link, "Received unrecoverable ECC err, please "
2733 "reboot\n");
2734 ixgbe_check_overtemp_event(adapter, eicr);
2735 break;
2736 default:
2737 break;
2738 }
2739
2740 ixgbe_check_fan_failure(adapter, eicr);
2741 if (unlikely(eicr & IXGBE_EICR_TIMESYNC))
2742 ixgbe_ptp_check_pps_event(adapter, eicr);
2743
2744 /* would disable interrupts here but EIAM disabled it */
2745 napi_schedule(&q_vector->napi);
2746
2747 /*
2748 * re-enable link(maybe) and non-queue interrupts, no flush.
2749 * ixgbe_poll will re-enable the queue interrupts
2750 */
2751 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2752 ixgbe_irq_enable(adapter, false, false);
2753
2754 return IRQ_HANDLED;
2755 }
2756
2757 /**
2758 * ixgbe_request_irq - initialize interrupts
2759 * @adapter: board private structure
2760 *
2761 * Attempts to configure interrupts using the best available
2762 * capabilities of the hardware and kernel.
2763 **/
2764 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
2765 {
2766 struct net_device *netdev = adapter->netdev;
2767 int err;
2768
2769 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2770 err = ixgbe_request_msix_irqs(adapter);
2771 else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED)
2772 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
2773 netdev->name, adapter);
2774 else
2775 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
2776 netdev->name, adapter);
2777
2778 if (err)
2779 e_err(probe, "request_irq failed, Error %d\n", err);
2780
2781 return err;
2782 }
2783
2784 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
2785 {
2786 int vector;
2787
2788 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
2789 free_irq(adapter->pdev->irq, adapter);
2790 return;
2791 }
2792
2793 for (vector = 0; vector < adapter->num_q_vectors; vector++) {
2794 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
2795 struct msix_entry *entry = &adapter->msix_entries[vector];
2796
2797 /* free only the irqs that were actually requested */
2798 if (!q_vector->rx.ring && !q_vector->tx.ring)
2799 continue;
2800
2801 /* clear the affinity_mask in the IRQ descriptor */
2802 irq_set_affinity_hint(entry->vector, NULL);
2803
2804 free_irq(entry->vector, q_vector);
2805 }
2806
2807 free_irq(adapter->msix_entries[vector++].vector, adapter);
2808 }
2809
2810 /**
2811 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
2812 * @adapter: board private structure
2813 **/
2814 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
2815 {
2816 switch (adapter->hw.mac.type) {
2817 case ixgbe_mac_82598EB:
2818 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
2819 break;
2820 case ixgbe_mac_82599EB:
2821 case ixgbe_mac_X540:
2822 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
2823 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
2824 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
2825 break;
2826 default:
2827 break;
2828 }
2829 IXGBE_WRITE_FLUSH(&adapter->hw);
2830 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2831 int vector;
2832
2833 for (vector = 0; vector < adapter->num_q_vectors; vector++)
2834 synchronize_irq(adapter->msix_entries[vector].vector);
2835
2836 synchronize_irq(adapter->msix_entries[vector++].vector);
2837 } else {
2838 synchronize_irq(adapter->pdev->irq);
2839 }
2840 }
2841
2842 /**
2843 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
2844 *
2845 **/
2846 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
2847 {
2848 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2849
2850 ixgbe_write_eitr(q_vector);
2851
2852 ixgbe_set_ivar(adapter, 0, 0, 0);
2853 ixgbe_set_ivar(adapter, 1, 0, 0);
2854
2855 e_info(hw, "Legacy interrupt IVAR setup done\n");
2856 }
2857
2858 /**
2859 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
2860 * @adapter: board private structure
2861 * @ring: structure containing ring specific data
2862 *
2863 * Configure the Tx descriptor ring after a reset.
2864 **/
2865 void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
2866 struct ixgbe_ring *ring)
2867 {
2868 struct ixgbe_hw *hw = &adapter->hw;
2869 u64 tdba = ring->dma;
2870 int wait_loop = 10;
2871 u32 txdctl = IXGBE_TXDCTL_ENABLE;
2872 u8 reg_idx = ring->reg_idx;
2873
2874 /* disable queue to avoid issues while updating state */
2875 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), 0);
2876 IXGBE_WRITE_FLUSH(hw);
2877
2878 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
2879 (tdba & DMA_BIT_MASK(32)));
2880 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
2881 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
2882 ring->count * sizeof(union ixgbe_adv_tx_desc));
2883 IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
2884 IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
2885 ring->tail = hw->hw_addr + IXGBE_TDT(reg_idx);
2886
2887 /*
2888 * set WTHRESH to encourage burst writeback, it should not be set
2889 * higher than 1 when:
2890 * - ITR is 0 as it could cause false TX hangs
2891 * - ITR is set to > 100k int/sec and BQL is enabled
2892 *
2893 * In order to avoid issues WTHRESH + PTHRESH should always be equal
2894 * to or less than the number of on chip descriptors, which is
2895 * currently 40.
2896 */
2897 #if IS_ENABLED(CONFIG_BQL)
2898 if (!ring->q_vector || (ring->q_vector->itr < IXGBE_100K_ITR))
2899 #else
2900 if (!ring->q_vector || (ring->q_vector->itr < 8))
2901 #endif
2902 txdctl |= (1 << 16); /* WTHRESH = 1 */
2903 else
2904 txdctl |= (8 << 16); /* WTHRESH = 8 */
2905
2906 /*
2907 * Setting PTHRESH to 32 both improves performance
2908 * and avoids a TX hang with DFP enabled
2909 */
2910 txdctl |= (1 << 8) | /* HTHRESH = 1 */
2911 32; /* PTHRESH = 32 */
2912
2913 /* reinitialize flowdirector state */
2914 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2915 ring->atr_sample_rate = adapter->atr_sample_rate;
2916 ring->atr_count = 0;
2917 set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state);
2918 } else {
2919 ring->atr_sample_rate = 0;
2920 }
2921
2922 /* initialize XPS */
2923 if (!test_and_set_bit(__IXGBE_TX_XPS_INIT_DONE, &ring->state)) {
2924 struct ixgbe_q_vector *q_vector = ring->q_vector;
2925
2926 if (q_vector)
2927 netif_set_xps_queue(adapter->netdev,
2928 &q_vector->affinity_mask,
2929 ring->queue_index);
2930 }
2931
2932 clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state);
2933
2934 /* enable queue */
2935 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
2936
2937 /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2938 if (hw->mac.type == ixgbe_mac_82598EB &&
2939 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2940 return;
2941
2942 /* poll to verify queue is enabled */
2943 do {
2944 usleep_range(1000, 2000);
2945 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2946 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
2947 if (!wait_loop)
2948 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx);
2949 }
2950
2951 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
2952 {
2953 struct ixgbe_hw *hw = &adapter->hw;
2954 u32 rttdcs, mtqc;
2955 u8 tcs = netdev_get_num_tc(adapter->netdev);
2956
2957 if (hw->mac.type == ixgbe_mac_82598EB)
2958 return;
2959
2960 /* disable the arbiter while setting MTQC */
2961 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
2962 rttdcs |= IXGBE_RTTDCS_ARBDIS;
2963 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2964
2965 /* set transmit pool layout */
2966 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
2967 mtqc = IXGBE_MTQC_VT_ENA;
2968 if (tcs > 4)
2969 mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
2970 else if (tcs > 1)
2971 mtqc |= IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
2972 else if (adapter->ring_feature[RING_F_RSS].indices == 4)
2973 mtqc |= IXGBE_MTQC_32VF;
2974 else
2975 mtqc |= IXGBE_MTQC_64VF;
2976 } else {
2977 if (tcs > 4)
2978 mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
2979 else if (tcs > 1)
2980 mtqc = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
2981 else
2982 mtqc = IXGBE_MTQC_64Q_1PB;
2983 }
2984
2985 IXGBE_WRITE_REG(hw, IXGBE_MTQC, mtqc);
2986
2987 /* Enable Security TX Buffer IFG for multiple pb */
2988 if (tcs) {
2989 u32 sectx = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);
2990 sectx |= IXGBE_SECTX_DCB;
2991 IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, sectx);
2992 }
2993
2994 /* re-enable the arbiter */
2995 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
2996 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2997 }
2998
2999 /**
3000 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
3001 * @adapter: board private structure
3002 *
3003 * Configure the Tx unit of the MAC after a reset.
3004 **/
3005 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
3006 {
3007 struct ixgbe_hw *hw = &adapter->hw;
3008 u32 dmatxctl;
3009 u32 i;
3010
3011 ixgbe_setup_mtqc(adapter);
3012
3013 if (hw->mac.type != ixgbe_mac_82598EB) {
3014 /* DMATXCTL.EN must be before Tx queues are enabled */
3015 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
3016 dmatxctl |= IXGBE_DMATXCTL_TE;
3017 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
3018 }
3019
3020 /* Setup the HW Tx Head and Tail descriptor pointers */
3021 for (i = 0; i < adapter->num_tx_queues; i++)
3022 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
3023 }
3024
3025 static void ixgbe_enable_rx_drop(struct ixgbe_adapter *adapter,
3026 struct ixgbe_ring *ring)
3027 {
3028 struct ixgbe_hw *hw = &adapter->hw;
3029 u8 reg_idx = ring->reg_idx;
3030 u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
3031
3032 srrctl |= IXGBE_SRRCTL_DROP_EN;
3033
3034 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3035 }
3036
3037 static void ixgbe_disable_rx_drop(struct ixgbe_adapter *adapter,
3038 struct ixgbe_ring *ring)
3039 {
3040 struct ixgbe_hw *hw = &adapter->hw;
3041 u8 reg_idx = ring->reg_idx;
3042 u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
3043
3044 srrctl &= ~IXGBE_SRRCTL_DROP_EN;
3045
3046 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3047 }
3048
3049 #ifdef CONFIG_IXGBE_DCB
3050 void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
3051 #else
3052 static void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
3053 #endif
3054 {
3055 int i;
3056 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
3057
3058 if (adapter->ixgbe_ieee_pfc)
3059 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
3060
3061 /*
3062 * We should set the drop enable bit if:
3063 * SR-IOV is enabled
3064 * or
3065 * Number of Rx queues > 1 and flow control is disabled
3066 *
3067 * This allows us to avoid head of line blocking for security
3068 * and performance reasons.
3069 */
3070 if (adapter->num_vfs || (adapter->num_rx_queues > 1 &&
3071 !(adapter->hw.fc.current_mode & ixgbe_fc_tx_pause) && !pfc_en)) {
3072 for (i = 0; i < adapter->num_rx_queues; i++)
3073 ixgbe_enable_rx_drop(adapter, adapter->rx_ring[i]);
3074 } else {
3075 for (i = 0; i < adapter->num_rx_queues; i++)
3076 ixgbe_disable_rx_drop(adapter, adapter->rx_ring[i]);
3077 }
3078 }
3079
3080 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
3081
3082 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
3083 struct ixgbe_ring *rx_ring)
3084 {
3085 struct ixgbe_hw *hw = &adapter->hw;
3086 u32 srrctl;
3087 u8 reg_idx = rx_ring->reg_idx;
3088
3089 if (hw->mac.type == ixgbe_mac_82598EB) {
3090 u16 mask = adapter->ring_feature[RING_F_RSS].mask;
3091
3092 /*
3093 * if VMDq is not active we must program one srrctl register
3094 * per RSS queue since we have enabled RDRXCTL.MVMEN
3095 */
3096 reg_idx &= mask;
3097 }
3098
3099 /* configure header buffer length, needed for RSC */
3100 srrctl = IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;
3101
3102 /* configure the packet buffer length */
3103 srrctl |= ixgbe_rx_bufsz(rx_ring) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
3104
3105 /* configure descriptor type */
3106 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
3107
3108 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
3109 }
3110
3111 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
3112 {
3113 struct ixgbe_hw *hw = &adapter->hw;
3114 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
3115 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
3116 0x6A3E67EA, 0x14364D17, 0x3BED200D};
3117 u32 mrqc = 0, reta = 0;
3118 u32 rxcsum;
3119 int i, j;
3120 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices;
3121
3122 /*
3123 * Program table for at least 2 queues w/ SR-IOV so that VFs can
3124 * make full use of any rings they may have. We will use the
3125 * PSRTYPE register to control how many rings we use within the PF.
3126 */
3127 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) && (rss_i < 2))
3128 rss_i = 2;
3129
3130 /* Fill out hash function seeds */
3131 for (i = 0; i < 10; i++)
3132 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
3133
3134 /* Fill out redirection table */
3135 for (i = 0, j = 0; i < 128; i++, j++) {
3136 if (j == rss_i)
3137 j = 0;
3138 /* reta = 4-byte sliding window of
3139 * 0x00..(indices-1)(indices-1)00..etc. */
3140 reta = (reta << 8) | (j * 0x11);
3141 if ((i & 3) == 3)
3142 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
3143 }
3144
3145 /* Disable indicating checksum in descriptor, enables RSS hash */
3146 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
3147 rxcsum |= IXGBE_RXCSUM_PCSD;
3148 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
3149
3150 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
3151 if (adapter->ring_feature[RING_F_RSS].mask)
3152 mrqc = IXGBE_MRQC_RSSEN;
3153 } else {
3154 u8 tcs = netdev_get_num_tc(adapter->netdev);
3155
3156 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3157 if (tcs > 4)
3158 mrqc = IXGBE_MRQC_VMDQRT8TCEN; /* 8 TCs */
3159 else if (tcs > 1)
3160 mrqc = IXGBE_MRQC_VMDQRT4TCEN; /* 4 TCs */
3161 else if (adapter->ring_feature[RING_F_RSS].indices == 4)
3162 mrqc = IXGBE_MRQC_VMDQRSS32EN;
3163 else
3164 mrqc = IXGBE_MRQC_VMDQRSS64EN;
3165 } else {
3166 if (tcs > 4)
3167 mrqc = IXGBE_MRQC_RTRSS8TCEN;
3168 else if (tcs > 1)
3169 mrqc = IXGBE_MRQC_RTRSS4TCEN;
3170 else
3171 mrqc = IXGBE_MRQC_RSSEN;
3172 }
3173 }
3174
3175 /* Perform hash on these packet types */
3176 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4 |
3177 IXGBE_MRQC_RSS_FIELD_IPV4_TCP |
3178 IXGBE_MRQC_RSS_FIELD_IPV6 |
3179 IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
3180
3181 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV4_UDP)
3182 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4_UDP;
3183 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV6_UDP)
3184 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
3185
3186 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
3187 }
3188
3189 /**
3190 * ixgbe_configure_rscctl - enable RSC for the indicated ring
3191 * @adapter: address of board private structure
3192 * @index: index of ring to set
3193 **/
3194 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
3195 struct ixgbe_ring *ring)
3196 {
3197 struct ixgbe_hw *hw = &adapter->hw;
3198 u32 rscctrl;
3199 u8 reg_idx = ring->reg_idx;
3200
3201 if (!ring_is_rsc_enabled(ring))
3202 return;
3203
3204 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
3205 rscctrl |= IXGBE_RSCCTL_RSCEN;
3206 /*
3207 * we must limit the number of descriptors so that the
3208 * total size of max desc * buf_len is not greater
3209 * than 65536
3210 */
3211 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
3212 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
3213 }
3214
3215 #define IXGBE_MAX_RX_DESC_POLL 10
3216 static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
3217 struct ixgbe_ring *ring)
3218 {
3219 struct ixgbe_hw *hw = &adapter->hw;
3220 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3221 u32 rxdctl;
3222 u8 reg_idx = ring->reg_idx;
3223
3224 /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
3225 if (hw->mac.type == ixgbe_mac_82598EB &&
3226 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3227 return;
3228
3229 do {
3230 usleep_range(1000, 2000);
3231 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3232 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
3233
3234 if (!wait_loop) {
3235 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
3236 "the polling period\n", reg_idx);
3237 }
3238 }
3239
3240 void ixgbe_disable_rx_queue(struct ixgbe_adapter *adapter,
3241 struct ixgbe_ring *ring)
3242 {
3243 struct ixgbe_hw *hw = &adapter->hw;
3244 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3245 u32 rxdctl;
3246 u8 reg_idx = ring->reg_idx;
3247
3248 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3249 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
3250
3251 /* write value back with RXDCTL.ENABLE bit cleared */
3252 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3253
3254 if (hw->mac.type == ixgbe_mac_82598EB &&
3255 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3256 return;
3257
3258 /* the hardware may take up to 100us to really disable the rx queue */
3259 do {
3260 udelay(10);
3261 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3262 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
3263
3264 if (!wait_loop) {
3265 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not cleared within "
3266 "the polling period\n", reg_idx);
3267 }
3268 }
3269
3270 void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
3271 struct ixgbe_ring *ring)
3272 {
3273 struct ixgbe_hw *hw = &adapter->hw;
3274 u64 rdba = ring->dma;
3275 u32 rxdctl;
3276 u8 reg_idx = ring->reg_idx;
3277
3278 /* disable queue to avoid issues while updating state */
3279 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3280 ixgbe_disable_rx_queue(adapter, ring);
3281
3282 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
3283 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
3284 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
3285 ring->count * sizeof(union ixgbe_adv_rx_desc));
3286 IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
3287 IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
3288 ring->tail = hw->hw_addr + IXGBE_RDT(reg_idx);
3289
3290 ixgbe_configure_srrctl(adapter, ring);
3291 ixgbe_configure_rscctl(adapter, ring);
3292
3293 if (hw->mac.type == ixgbe_mac_82598EB) {
3294 /*
3295 * enable cache line friendly hardware writes:
3296 * PTHRESH=32 descriptors (half the internal cache),
3297 * this also removes ugly rx_no_buffer_count increment
3298 * HTHRESH=4 descriptors (to minimize latency on fetch)
3299 * WTHRESH=8 burst writeback up to two cache lines
3300 */
3301 rxdctl &= ~0x3FFFFF;
3302 rxdctl |= 0x080420;
3303 }
3304
3305 /* enable receive descriptor ring */
3306 rxdctl |= IXGBE_RXDCTL_ENABLE;
3307 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3308
3309 ixgbe_rx_desc_queue_enable(adapter, ring);
3310 ixgbe_alloc_rx_buffers(ring, ixgbe_desc_unused(ring));
3311 }
3312
3313 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
3314 {
3315 struct ixgbe_hw *hw = &adapter->hw;
3316 int rss_i = adapter->ring_feature[RING_F_RSS].indices;
3317 int p;
3318
3319 /* PSRTYPE must be initialized in non 82598 adapters */
3320 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
3321 IXGBE_PSRTYPE_UDPHDR |
3322 IXGBE_PSRTYPE_IPV4HDR |
3323 IXGBE_PSRTYPE_L2HDR |
3324 IXGBE_PSRTYPE_IPV6HDR;
3325
3326 if (hw->mac.type == ixgbe_mac_82598EB)
3327 return;
3328
3329 if (rss_i > 3)
3330 psrtype |= 2 << 29;
3331 else if (rss_i > 1)
3332 psrtype |= 1 << 29;
3333
3334 for (p = 0; p < adapter->num_rx_pools; p++)
3335 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(VMDQ_P(p)),
3336 psrtype);
3337 }
3338
3339 static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
3340 {
3341 struct ixgbe_hw *hw = &adapter->hw;
3342 u32 reg_offset, vf_shift;
3343 u32 gcr_ext, vmdctl;
3344 int i;
3345
3346 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
3347 return;
3348
3349 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
3350 vmdctl |= IXGBE_VMD_CTL_VMDQ_EN;
3351 vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
3352 vmdctl |= VMDQ_P(0) << IXGBE_VT_CTL_POOL_SHIFT;
3353 vmdctl |= IXGBE_VT_CTL_REPLEN;
3354 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
3355
3356 vf_shift = VMDQ_P(0) % 32;
3357 reg_offset = (VMDQ_P(0) >= 32) ? 1 : 0;
3358
3359 /* Enable only the PF's pool for Tx/Rx */
3360 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (~0) << vf_shift);
3361 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), reg_offset - 1);
3362 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (~0) << vf_shift);
3363 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), reg_offset - 1);
3364 if (adapter->flags2 & IXGBE_FLAG2_BRIDGE_MODE_VEB)
3365 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
3366
3367 /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
3368 hw->mac.ops.set_vmdq(hw, 0, VMDQ_P(0));
3369
3370 /*
3371 * Set up VF register offsets for selected VT Mode,
3372 * i.e. 32 or 64 VFs for SR-IOV
3373 */
3374 switch (adapter->ring_feature[RING_F_VMDQ].mask) {
3375 case IXGBE_82599_VMDQ_8Q_MASK:
3376 gcr_ext = IXGBE_GCR_EXT_VT_MODE_16;
3377 break;
3378 case IXGBE_82599_VMDQ_4Q_MASK:
3379 gcr_ext = IXGBE_GCR_EXT_VT_MODE_32;
3380 break;
3381 default:
3382 gcr_ext = IXGBE_GCR_EXT_VT_MODE_64;
3383 break;
3384 }
3385
3386 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
3387
3388
3389 /* Enable MAC Anti-Spoofing */
3390 hw->mac.ops.set_mac_anti_spoofing(hw, (adapter->num_vfs != 0),
3391 adapter->num_vfs);
3392 /* For VFs that have spoof checking turned off */
3393 for (i = 0; i < adapter->num_vfs; i++) {
3394 if (!adapter->vfinfo[i].spoofchk_enabled)
3395 ixgbe_ndo_set_vf_spoofchk(adapter->netdev, i, false);
3396 }
3397 }
3398
3399 static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
3400 {
3401 struct ixgbe_hw *hw = &adapter->hw;
3402 struct net_device *netdev = adapter->netdev;
3403 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3404 struct ixgbe_ring *rx_ring;
3405 int i;
3406 u32 mhadd, hlreg0;
3407
3408 #ifdef IXGBE_FCOE
3409 /* adjust max frame to be able to do baby jumbo for FCoE */
3410 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
3411 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
3412 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
3413
3414 #endif /* IXGBE_FCOE */
3415
3416 /* adjust max frame to be at least the size of a standard frame */
3417 if (max_frame < (ETH_FRAME_LEN + ETH_FCS_LEN))
3418 max_frame = (ETH_FRAME_LEN + ETH_FCS_LEN);
3419
3420 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
3421 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
3422 mhadd &= ~IXGBE_MHADD_MFS_MASK;
3423 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
3424
3425 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
3426 }
3427
3428 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
3429 /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
3430 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
3431 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
3432
3433 /*
3434 * Setup the HW Rx Head and Tail Descriptor Pointers and
3435 * the Base and Length of the Rx Descriptor Ring
3436 */
3437 for (i = 0; i < adapter->num_rx_queues; i++) {
3438 rx_ring = adapter->rx_ring[i];
3439 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
3440 set_ring_rsc_enabled(rx_ring);
3441 else
3442 clear_ring_rsc_enabled(rx_ring);
3443 }
3444 }
3445
3446 static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
3447 {
3448 struct ixgbe_hw *hw = &adapter->hw;
3449 u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
3450
3451 switch (hw->mac.type) {
3452 case ixgbe_mac_82598EB:
3453 /*
3454 * For VMDq support of different descriptor types or
3455 * buffer sizes through the use of multiple SRRCTL
3456 * registers, RDRXCTL.MVMEN must be set to 1
3457 *
3458 * also, the manual doesn't mention it clearly but DCA hints
3459 * will only use queue 0's tags unless this bit is set. Side
3460 * effects of setting this bit are only that SRRCTL must be
3461 * fully programmed [0..15]
3462 */
3463 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
3464 break;
3465 case ixgbe_mac_82599EB:
3466 case ixgbe_mac_X540:
3467 /* Disable RSC for ACK packets */
3468 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
3469 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
3470 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
3471 /* hardware requires some bits to be set by default */
3472 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
3473 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
3474 break;
3475 default:
3476 /* We should do nothing since we don't know this hardware */
3477 return;
3478 }
3479
3480 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
3481 }
3482
3483 /**
3484 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
3485 * @adapter: board private structure
3486 *
3487 * Configure the Rx unit of the MAC after a reset.
3488 **/
3489 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
3490 {
3491 struct ixgbe_hw *hw = &adapter->hw;
3492 int i;
3493 u32 rxctrl;
3494
3495 /* disable receives while setting up the descriptors */
3496 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3497 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3498
3499 ixgbe_setup_psrtype(adapter);
3500 ixgbe_setup_rdrxctl(adapter);
3501
3502 /* Program registers for the distribution of queues */
3503 ixgbe_setup_mrqc(adapter);
3504
3505 /* set_rx_buffer_len must be called before ring initialization */
3506 ixgbe_set_rx_buffer_len(adapter);
3507
3508 /*
3509 * Setup the HW Rx Head and Tail Descriptor Pointers and
3510 * the Base and Length of the Rx Descriptor Ring
3511 */
3512 for (i = 0; i < adapter->num_rx_queues; i++)
3513 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
3514
3515 /* disable drop enable for 82598 parts */
3516 if (hw->mac.type == ixgbe_mac_82598EB)
3517 rxctrl |= IXGBE_RXCTRL_DMBYPS;
3518
3519 /* enable all receives */
3520 rxctrl |= IXGBE_RXCTRL_RXEN;
3521 hw->mac.ops.enable_rx_dma(hw, rxctrl);
3522 }
3523
3524 static int ixgbe_vlan_rx_add_vid(struct net_device *netdev,
3525 __be16 proto, u16 vid)
3526 {
3527 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3528 struct ixgbe_hw *hw = &adapter->hw;
3529
3530 /* add VID to filter table */
3531 hw->mac.ops.set_vfta(&adapter->hw, vid, VMDQ_P(0), true);
3532 set_bit(vid, adapter->active_vlans);
3533
3534 return 0;
3535 }
3536
3537 static int ixgbe_vlan_rx_kill_vid(struct net_device *netdev,
3538 __be16 proto, u16 vid)
3539 {
3540 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3541 struct ixgbe_hw *hw = &adapter->hw;
3542
3543 /* remove VID from filter table */
3544 hw->mac.ops.set_vfta(&adapter->hw, vid, VMDQ_P(0), false);
3545 clear_bit(vid, adapter->active_vlans);
3546
3547 return 0;
3548 }
3549
3550 /**
3551 * ixgbe_vlan_filter_disable - helper to disable hw vlan filtering
3552 * @adapter: driver data
3553 */
3554 static void ixgbe_vlan_filter_disable(struct ixgbe_adapter *adapter)
3555 {
3556 struct ixgbe_hw *hw = &adapter->hw;
3557 u32 vlnctrl;
3558
3559 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3560 vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
3561 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3562 }
3563
3564 /**
3565 * ixgbe_vlan_filter_enable - helper to enable hw vlan filtering
3566 * @adapter: driver data
3567 */
3568 static void ixgbe_vlan_filter_enable(struct ixgbe_adapter *adapter)
3569 {
3570 struct ixgbe_hw *hw = &adapter->hw;
3571 u32 vlnctrl;
3572
3573 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3574 vlnctrl |= IXGBE_VLNCTRL_VFE;
3575 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
3576 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3577 }
3578
3579 /**
3580 * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping
3581 * @adapter: driver data
3582 */
3583 static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
3584 {
3585 struct ixgbe_hw *hw = &adapter->hw;
3586 u32 vlnctrl;
3587 int i, j;
3588
3589 switch (hw->mac.type) {
3590 case ixgbe_mac_82598EB:
3591 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3592 vlnctrl &= ~IXGBE_VLNCTRL_VME;
3593 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3594 break;
3595 case ixgbe_mac_82599EB:
3596 case ixgbe_mac_X540:
3597 for (i = 0; i < adapter->num_rx_queues; i++) {
3598 j = adapter->rx_ring[i]->reg_idx;
3599 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3600 vlnctrl &= ~IXGBE_RXDCTL_VME;
3601 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3602 }
3603 break;
3604 default:
3605 break;
3606 }
3607 }
3608
3609 /**
3610 * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping
3611 * @adapter: driver data
3612 */
3613 static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
3614 {
3615 struct ixgbe_hw *hw = &adapter->hw;
3616 u32 vlnctrl;
3617 int i, j;
3618
3619 switch (hw->mac.type) {
3620 case ixgbe_mac_82598EB:
3621 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3622 vlnctrl |= IXGBE_VLNCTRL_VME;
3623 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3624 break;
3625 case ixgbe_mac_82599EB:
3626 case ixgbe_mac_X540:
3627 for (i = 0; i < adapter->num_rx_queues; i++) {
3628 j = adapter->rx_ring[i]->reg_idx;
3629 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3630 vlnctrl |= IXGBE_RXDCTL_VME;
3631 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3632 }
3633 break;
3634 default:
3635 break;
3636 }
3637 }
3638
3639 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
3640 {
3641 u16 vid;
3642
3643 ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0);
3644
3645 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
3646 ixgbe_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
3647 }
3648
3649 /**
3650 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
3651 * @netdev: network interface device structure
3652 *
3653 * Writes unicast address list to the RAR table.
3654 * Returns: -ENOMEM on failure/insufficient address space
3655 * 0 on no addresses written
3656 * X on writing X addresses to the RAR table
3657 **/
3658 static int ixgbe_write_uc_addr_list(struct net_device *netdev)
3659 {
3660 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3661 struct ixgbe_hw *hw = &adapter->hw;
3662 unsigned int rar_entries = hw->mac.num_rar_entries - 1;
3663 int count = 0;
3664
3665 /* In SR-IOV mode significantly less RAR entries are available */
3666 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3667 rar_entries = IXGBE_MAX_PF_MACVLANS - 1;
3668
3669 /* return ENOMEM indicating insufficient memory for addresses */
3670 if (netdev_uc_count(netdev) > rar_entries)
3671 return -ENOMEM;
3672
3673 if (!netdev_uc_empty(netdev)) {
3674 struct netdev_hw_addr *ha;
3675 /* return error if we do not support writing to RAR table */
3676 if (!hw->mac.ops.set_rar)
3677 return -ENOMEM;
3678
3679 netdev_for_each_uc_addr(ha, netdev) {
3680 if (!rar_entries)
3681 break;
3682 hw->mac.ops.set_rar(hw, rar_entries--, ha->addr,
3683 VMDQ_P(0), IXGBE_RAH_AV);
3684 count++;
3685 }
3686 }
3687 /* write the addresses in reverse order to avoid write combining */
3688 for (; rar_entries > 0 ; rar_entries--)
3689 hw->mac.ops.clear_rar(hw, rar_entries);
3690
3691 return count;
3692 }
3693
3694 /**
3695 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
3696 * @netdev: network interface device structure
3697 *
3698 * The set_rx_method entry point is called whenever the unicast/multicast
3699 * address list or the network interface flags are updated. This routine is
3700 * responsible for configuring the hardware for proper unicast, multicast and
3701 * promiscuous mode.
3702 **/
3703 void ixgbe_set_rx_mode(struct net_device *netdev)
3704 {
3705 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3706 struct ixgbe_hw *hw = &adapter->hw;
3707 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
3708 int count;
3709
3710 /* Check for Promiscuous and All Multicast modes */
3711
3712 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3713
3714 /* set all bits that we expect to always be set */
3715 fctrl &= ~IXGBE_FCTRL_SBP; /* disable store-bad-packets */
3716 fctrl |= IXGBE_FCTRL_BAM;
3717 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
3718 fctrl |= IXGBE_FCTRL_PMCF;
3719
3720 /* clear the bits we are changing the status of */
3721 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3722
3723 if (netdev->flags & IFF_PROMISC) {
3724 hw->addr_ctrl.user_set_promisc = true;
3725 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3726 vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_MPE);
3727 /* don't hardware filter vlans in promisc mode */
3728 ixgbe_vlan_filter_disable(adapter);
3729 } else {
3730 if (netdev->flags & IFF_ALLMULTI) {
3731 fctrl |= IXGBE_FCTRL_MPE;
3732 vmolr |= IXGBE_VMOLR_MPE;
3733 } else {
3734 /*
3735 * Write addresses to the MTA, if the attempt fails
3736 * then we should just turn on promiscuous mode so
3737 * that we can at least receive multicast traffic
3738 */
3739 hw->mac.ops.update_mc_addr_list(hw, netdev);
3740 vmolr |= IXGBE_VMOLR_ROMPE;
3741 }
3742 ixgbe_vlan_filter_enable(adapter);
3743 hw->addr_ctrl.user_set_promisc = false;
3744 }
3745
3746 /*
3747 * Write addresses to available RAR registers, if there is not
3748 * sufficient space to store all the addresses then enable
3749 * unicast promiscuous mode
3750 */
3751 count = ixgbe_write_uc_addr_list(netdev);
3752 if (count < 0) {
3753 fctrl |= IXGBE_FCTRL_UPE;
3754 vmolr |= IXGBE_VMOLR_ROPE;
3755 }
3756
3757 if (adapter->num_vfs)
3758 ixgbe_restore_vf_multicasts(adapter);
3759
3760 if (hw->mac.type != ixgbe_mac_82598EB) {
3761 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(VMDQ_P(0))) &
3762 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
3763 IXGBE_VMOLR_ROPE);
3764 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(VMDQ_P(0)), vmolr);
3765 }
3766
3767 /* This is useful for sniffing bad packets. */
3768 if (adapter->netdev->features & NETIF_F_RXALL) {
3769 /* UPE and MPE will be handled by normal PROMISC logic
3770 * in e1000e_set_rx_mode */
3771 fctrl |= (IXGBE_FCTRL_SBP | /* Receive bad packets */
3772 IXGBE_FCTRL_BAM | /* RX All Bcast Pkts */
3773 IXGBE_FCTRL_PMCF); /* RX All MAC Ctrl Pkts */
3774
3775 fctrl &= ~(IXGBE_FCTRL_DPF);
3776 /* NOTE: VLAN filtering is disabled by setting PROMISC */
3777 }
3778
3779 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
3780
3781 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
3782 ixgbe_vlan_strip_enable(adapter);
3783 else
3784 ixgbe_vlan_strip_disable(adapter);
3785 }
3786
3787 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
3788 {
3789 int q_idx;
3790
3791 for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) {
3792 ixgbe_qv_init_lock(adapter->q_vector[q_idx]);
3793 napi_enable(&adapter->q_vector[q_idx]->napi);
3794 }
3795 }
3796
3797 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
3798 {
3799 int q_idx;
3800
3801 local_bh_disable(); /* for ixgbe_qv_lock_napi() */
3802 for (q_idx = 0; q_idx < adapter->num_q_vectors; q_idx++) {
3803 napi_disable(&adapter->q_vector[q_idx]->napi);
3804 while (!ixgbe_qv_lock_napi(adapter->q_vector[q_idx])) {
3805 pr_info("QV %d locked\n", q_idx);
3806 mdelay(1);
3807 }
3808 }
3809 local_bh_enable();
3810 }
3811
3812 #ifdef CONFIG_IXGBE_DCB
3813 /**
3814 * ixgbe_configure_dcb - Configure DCB hardware
3815 * @adapter: ixgbe adapter struct
3816 *
3817 * This is called by the driver on open to configure the DCB hardware.
3818 * This is also called by the gennetlink interface when reconfiguring
3819 * the DCB state.
3820 */
3821 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
3822 {
3823 struct ixgbe_hw *hw = &adapter->hw;
3824 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3825
3826 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
3827 if (hw->mac.type == ixgbe_mac_82598EB)
3828 netif_set_gso_max_size(adapter->netdev, 65536);
3829 return;
3830 }
3831
3832 if (hw->mac.type == ixgbe_mac_82598EB)
3833 netif_set_gso_max_size(adapter->netdev, 32768);
3834
3835 #ifdef IXGBE_FCOE
3836 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
3837 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
3838 #endif
3839
3840 /* reconfigure the hardware */
3841 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE) {
3842 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3843 DCB_TX_CONFIG);
3844 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3845 DCB_RX_CONFIG);
3846 ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
3847 } else if (adapter->ixgbe_ieee_ets && adapter->ixgbe_ieee_pfc) {
3848 ixgbe_dcb_hw_ets(&adapter->hw,
3849 adapter->ixgbe_ieee_ets,
3850 max_frame);
3851 ixgbe_dcb_hw_pfc_config(&adapter->hw,
3852 adapter->ixgbe_ieee_pfc->pfc_en,
3853 adapter->ixgbe_ieee_ets->prio_tc);
3854 }
3855
3856 /* Enable RSS Hash per TC */
3857 if (hw->mac.type != ixgbe_mac_82598EB) {
3858 u32 msb = 0;
3859 u16 rss_i = adapter->ring_feature[RING_F_RSS].indices - 1;
3860
3861 while (rss_i) {
3862 msb++;
3863 rss_i >>= 1;
3864 }
3865
3866 /* write msb to all 8 TCs in one write */
3867 IXGBE_WRITE_REG(hw, IXGBE_RQTC, msb * 0x11111111);
3868 }
3869 }
3870 #endif
3871
3872 /* Additional bittime to account for IXGBE framing */
3873 #define IXGBE_ETH_FRAMING 20
3874
3875 /**
3876 * ixgbe_hpbthresh - calculate high water mark for flow control
3877 *
3878 * @adapter: board private structure to calculate for
3879 * @pb: packet buffer to calculate
3880 */
3881 static int ixgbe_hpbthresh(struct ixgbe_adapter *adapter, int pb)
3882 {
3883 struct ixgbe_hw *hw = &adapter->hw;
3884 struct net_device *dev = adapter->netdev;
3885 int link, tc, kb, marker;
3886 u32 dv_id, rx_pba;
3887
3888 /* Calculate max LAN frame size */
3889 tc = link = dev->mtu + ETH_HLEN + ETH_FCS_LEN + IXGBE_ETH_FRAMING;
3890
3891 #ifdef IXGBE_FCOE
3892 /* FCoE traffic class uses FCOE jumbo frames */
3893 if ((dev->features & NETIF_F_FCOE_MTU) &&
3894 (tc < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
3895 (pb == ixgbe_fcoe_get_tc(adapter)))
3896 tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
3897
3898 #endif
3899 /* Calculate delay value for device */
3900 switch (hw->mac.type) {
3901 case ixgbe_mac_X540:
3902 dv_id = IXGBE_DV_X540(link, tc);
3903 break;
3904 default:
3905 dv_id = IXGBE_DV(link, tc);
3906 break;
3907 }
3908
3909 /* Loopback switch introduces additional latency */
3910 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3911 dv_id += IXGBE_B2BT(tc);
3912
3913 /* Delay value is calculated in bit times convert to KB */
3914 kb = IXGBE_BT2KB(dv_id);
3915 rx_pba = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(pb)) >> 10;
3916
3917 marker = rx_pba - kb;
3918
3919 /* It is possible that the packet buffer is not large enough
3920 * to provide required headroom. In this case throw an error
3921 * to user and a do the best we can.
3922 */
3923 if (marker < 0) {
3924 e_warn(drv, "Packet Buffer(%i) can not provide enough"
3925 "headroom to support flow control."
3926 "Decrease MTU or number of traffic classes\n", pb);
3927 marker = tc + 1;
3928 }
3929
3930 return marker;
3931 }
3932
3933 /**
3934 * ixgbe_lpbthresh - calculate low water mark for for flow control
3935 *
3936 * @adapter: board private structure to calculate for
3937 * @pb: packet buffer to calculate
3938 */
3939 static int ixgbe_lpbthresh(struct ixgbe_adapter *adapter)
3940 {
3941 struct ixgbe_hw *hw = &adapter->hw;
3942 struct net_device *dev = adapter->netdev;
3943 int tc;
3944 u32 dv_id;
3945
3946 /* Calculate max LAN frame size */
3947 tc = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
3948
3949 /* Calculate delay value for device */
3950 switch (hw->mac.type) {
3951 case ixgbe_mac_X540:
3952 dv_id = IXGBE_LOW_DV_X540(tc);
3953 break;
3954 default:
3955 dv_id = IXGBE_LOW_DV(tc);
3956 break;
3957 }
3958
3959 /* Delay value is calculated in bit times convert to KB */
3960 return IXGBE_BT2KB(dv_id);
3961 }
3962
3963 /*
3964 * ixgbe_pbthresh_setup - calculate and setup high low water marks
3965 */
3966 static void ixgbe_pbthresh_setup(struct ixgbe_adapter *adapter)
3967 {
3968 struct ixgbe_hw *hw = &adapter->hw;
3969 int num_tc = netdev_get_num_tc(adapter->netdev);
3970 int i;
3971
3972 if (!num_tc)
3973 num_tc = 1;
3974
3975 hw->fc.low_water = ixgbe_lpbthresh(adapter);
3976
3977 for (i = 0; i < num_tc; i++) {
3978 hw->fc.high_water[i] = ixgbe_hpbthresh(adapter, i);
3979
3980 /* Low water marks must not be larger than high water marks */
3981 if (hw->fc.low_water > hw->fc.high_water[i])
3982 hw->fc.low_water = 0;
3983 }
3984 }
3985
3986 static void ixgbe_configure_pb(struct ixgbe_adapter *adapter)
3987 {
3988 struct ixgbe_hw *hw = &adapter->hw;
3989 int hdrm;
3990 u8 tc = netdev_get_num_tc(adapter->netdev);
3991
3992 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3993 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
3994 hdrm = 32 << adapter->fdir_pballoc;
3995 else
3996 hdrm = 0;
3997
3998 hw->mac.ops.set_rxpba(hw, tc, hdrm, PBA_STRATEGY_EQUAL);
3999 ixgbe_pbthresh_setup(adapter);
4000 }
4001
4002 static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
4003 {
4004 struct ixgbe_hw *hw = &adapter->hw;
4005 struct hlist_node *node2;
4006 struct ixgbe_fdir_filter *filter;
4007
4008 spin_lock(&adapter->fdir_perfect_lock);
4009
4010 if (!hlist_empty(&adapter->fdir_filter_list))
4011 ixgbe_fdir_set_input_mask_82599(hw, &adapter->fdir_mask);
4012
4013 hlist_for_each_entry_safe(filter, node2,
4014 &adapter->fdir_filter_list, fdir_node) {
4015 ixgbe_fdir_write_perfect_filter_82599(hw,
4016 &filter->filter,
4017 filter->sw_idx,
4018 (filter->action == IXGBE_FDIR_DROP_QUEUE) ?
4019 IXGBE_FDIR_DROP_QUEUE :
4020 adapter->rx_ring[filter->action]->reg_idx);
4021 }
4022
4023 spin_unlock(&adapter->fdir_perfect_lock);
4024 }
4025
4026 static void ixgbe_configure(struct ixgbe_adapter *adapter)
4027 {
4028 struct ixgbe_hw *hw = &adapter->hw;
4029
4030 ixgbe_configure_pb(adapter);
4031 #ifdef CONFIG_IXGBE_DCB
4032 ixgbe_configure_dcb(adapter);
4033 #endif
4034 /*
4035 * We must restore virtualization before VLANs or else
4036 * the VLVF registers will not be populated
4037 */
4038 ixgbe_configure_virtualization(adapter);
4039
4040 ixgbe_set_rx_mode(adapter->netdev);
4041 ixgbe_restore_vlan(adapter);
4042
4043 switch (hw->mac.type) {
4044 case ixgbe_mac_82599EB:
4045 case ixgbe_mac_X540:
4046 hw->mac.ops.disable_rx_buff(hw);
4047 break;
4048 default:
4049 break;
4050 }
4051
4052 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
4053 ixgbe_init_fdir_signature_82599(&adapter->hw,
4054 adapter->fdir_pballoc);
4055 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
4056 ixgbe_init_fdir_perfect_82599(&adapter->hw,
4057 adapter->fdir_pballoc);
4058 ixgbe_fdir_filter_restore(adapter);
4059 }
4060
4061 switch (hw->mac.type) {
4062 case ixgbe_mac_82599EB:
4063 case ixgbe_mac_X540:
4064 hw->mac.ops.enable_rx_buff(hw);
4065 break;
4066 default:
4067 break;
4068 }
4069
4070 #ifdef IXGBE_FCOE
4071 /* configure FCoE L2 filters, redirection table, and Rx control */
4072 ixgbe_configure_fcoe(adapter);
4073
4074 #endif /* IXGBE_FCOE */
4075 ixgbe_configure_tx(adapter);
4076 ixgbe_configure_rx(adapter);
4077 }
4078
4079 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
4080 {
4081 switch (hw->phy.type) {
4082 case ixgbe_phy_sfp_avago:
4083 case ixgbe_phy_sfp_ftl:
4084 case ixgbe_phy_sfp_intel:
4085 case ixgbe_phy_sfp_unknown:
4086 case ixgbe_phy_sfp_passive_tyco:
4087 case ixgbe_phy_sfp_passive_unknown:
4088 case ixgbe_phy_sfp_active_unknown:
4089 case ixgbe_phy_sfp_ftl_active:
4090 return true;
4091 case ixgbe_phy_nl:
4092 if (hw->mac.type == ixgbe_mac_82598EB)
4093 return true;
4094 default:
4095 return false;
4096 }
4097 }
4098
4099 /**
4100 * ixgbe_sfp_link_config - set up SFP+ link
4101 * @adapter: pointer to private adapter struct
4102 **/
4103 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
4104 {
4105 /*
4106 * We are assuming the worst case scenario here, and that
4107 * is that an SFP was inserted/removed after the reset
4108 * but before SFP detection was enabled. As such the best
4109 * solution is to just start searching as soon as we start
4110 */
4111 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
4112 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
4113
4114 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
4115 }
4116
4117 /**
4118 * ixgbe_non_sfp_link_config - set up non-SFP+ link
4119 * @hw: pointer to private hardware struct
4120 *
4121 * Returns 0 on success, negative on failure
4122 **/
4123 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
4124 {
4125 u32 speed;
4126 bool autoneg, link_up = false;
4127 u32 ret = IXGBE_ERR_LINK_SETUP;
4128
4129 if (hw->mac.ops.check_link)
4130 ret = hw->mac.ops.check_link(hw, &speed, &link_up, false);
4131
4132 if (ret)
4133 goto link_cfg_out;
4134
4135 speed = hw->phy.autoneg_advertised;
4136 if ((!speed) && (hw->mac.ops.get_link_capabilities))
4137 ret = hw->mac.ops.get_link_capabilities(hw, &speed,
4138 &autoneg);
4139 if (ret)
4140 goto link_cfg_out;
4141
4142 if (hw->mac.ops.setup_link)
4143 ret = hw->mac.ops.setup_link(hw, speed, link_up);
4144 link_cfg_out:
4145 return ret;
4146 }
4147
4148 static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
4149 {
4150 struct ixgbe_hw *hw = &adapter->hw;
4151 u32 gpie = 0;
4152
4153 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4154 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
4155 IXGBE_GPIE_OCD;
4156 gpie |= IXGBE_GPIE_EIAME;
4157 /*
4158 * use EIAM to auto-mask when MSI-X interrupt is asserted
4159 * this saves a register write for every interrupt
4160 */
4161 switch (hw->mac.type) {
4162 case ixgbe_mac_82598EB:
4163 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
4164 break;
4165 case ixgbe_mac_82599EB:
4166 case ixgbe_mac_X540:
4167 default:
4168 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
4169 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
4170 break;
4171 }
4172 } else {
4173 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
4174 * specifically only auto mask tx and rx interrupts */
4175 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
4176 }
4177
4178 /* XXX: to interrupt immediately for EICS writes, enable this */
4179 /* gpie |= IXGBE_GPIE_EIMEN; */
4180
4181 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
4182 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
4183
4184 switch (adapter->ring_feature[RING_F_VMDQ].mask) {
4185 case IXGBE_82599_VMDQ_8Q_MASK:
4186 gpie |= IXGBE_GPIE_VTMODE_16;
4187 break;
4188 case IXGBE_82599_VMDQ_4Q_MASK:
4189 gpie |= IXGBE_GPIE_VTMODE_32;
4190 break;
4191 default:
4192 gpie |= IXGBE_GPIE_VTMODE_64;
4193 break;
4194 }
4195 }
4196
4197 /* Enable Thermal over heat sensor interrupt */
4198 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
4199 switch (adapter->hw.mac.type) {
4200 case ixgbe_mac_82599EB:
4201 gpie |= IXGBE_SDP0_GPIEN;
4202 break;
4203 case ixgbe_mac_X540:
4204 gpie |= IXGBE_EIMS_TS;
4205 break;
4206 default:
4207 break;
4208 }
4209 }
4210
4211 /* Enable fan failure interrupt */
4212 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
4213 gpie |= IXGBE_SDP1_GPIEN;
4214
4215 if (hw->mac.type == ixgbe_mac_82599EB) {
4216 gpie |= IXGBE_SDP1_GPIEN;
4217 gpie |= IXGBE_SDP2_GPIEN;
4218 }
4219
4220 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
4221 }
4222
4223 static void ixgbe_up_complete(struct ixgbe_adapter *adapter)
4224 {
4225 struct ixgbe_hw *hw = &adapter->hw;
4226 int err;
4227 u32 ctrl_ext;
4228
4229 ixgbe_get_hw_control(adapter);
4230 ixgbe_setup_gpie(adapter);
4231
4232 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4233 ixgbe_configure_msix(adapter);
4234 else
4235 ixgbe_configure_msi_and_legacy(adapter);
4236
4237 /* enable the optics for 82599 SFP+ fiber */
4238 if (hw->mac.ops.enable_tx_laser)
4239 hw->mac.ops.enable_tx_laser(hw);
4240
4241 clear_bit(__IXGBE_DOWN, &adapter->state);
4242 ixgbe_napi_enable_all(adapter);
4243
4244 if (ixgbe_is_sfp(hw)) {
4245 ixgbe_sfp_link_config(adapter);
4246 } else {
4247 err = ixgbe_non_sfp_link_config(hw);
4248 if (err)
4249 e_err(probe, "link_config FAILED %d\n", err);
4250 }
4251
4252 /* clear any pending interrupts, may auto mask */
4253 IXGBE_READ_REG(hw, IXGBE_EICR);
4254 ixgbe_irq_enable(adapter, true, true);
4255
4256 /*
4257 * If this adapter has a fan, check to see if we had a failure
4258 * before we enabled the interrupt.
4259 */
4260 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
4261 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
4262 if (esdp & IXGBE_ESDP_SDP1)
4263 e_crit(drv, "Fan has stopped, replace the adapter\n");
4264 }
4265
4266 /* enable transmits */
4267 netif_tx_start_all_queues(adapter->netdev);
4268
4269 /* bring the link up in the watchdog, this could race with our first
4270 * link up interrupt but shouldn't be a problem */
4271 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
4272 adapter->link_check_timeout = jiffies;
4273 mod_timer(&adapter->service_timer, jiffies);
4274
4275 /* Set PF Reset Done bit so PF/VF Mail Ops can work */
4276 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
4277 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
4278 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
4279 }
4280
4281 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
4282 {
4283 WARN_ON(in_interrupt());
4284 /* put off any impending NetWatchDogTimeout */
4285 adapter->netdev->trans_start = jiffies;
4286
4287 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
4288 usleep_range(1000, 2000);
4289 ixgbe_down(adapter);
4290 /*
4291 * If SR-IOV enabled then wait a bit before bringing the adapter
4292 * back up to give the VFs time to respond to the reset. The
4293 * two second wait is based upon the watchdog timer cycle in
4294 * the VF driver.
4295 */
4296 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4297 msleep(2000);
4298 ixgbe_up(adapter);
4299 clear_bit(__IXGBE_RESETTING, &adapter->state);
4300 }
4301
4302 void ixgbe_up(struct ixgbe_adapter *adapter)
4303 {
4304 /* hardware has been reset, we need to reload some things */
4305 ixgbe_configure(adapter);
4306
4307 ixgbe_up_complete(adapter);
4308 }
4309
4310 void ixgbe_reset(struct ixgbe_adapter *adapter)
4311 {
4312 struct ixgbe_hw *hw = &adapter->hw;
4313 int err;
4314
4315 /* lock SFP init bit to prevent race conditions with the watchdog */
4316 while (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
4317 usleep_range(1000, 2000);
4318
4319 /* clear all SFP and link config related flags while holding SFP_INIT */
4320 adapter->flags2 &= ~(IXGBE_FLAG2_SEARCH_FOR_SFP |
4321 IXGBE_FLAG2_SFP_NEEDS_RESET);
4322 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
4323
4324 err = hw->mac.ops.init_hw(hw);
4325 switch (err) {
4326 case 0:
4327 case IXGBE_ERR_SFP_NOT_PRESENT:
4328 case IXGBE_ERR_SFP_NOT_SUPPORTED:
4329 break;
4330 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
4331 e_dev_err("master disable timed out\n");
4332 break;
4333 case IXGBE_ERR_EEPROM_VERSION:
4334 /* We are running on a pre-production device, log a warning */
4335 e_dev_warn("This device is a pre-production adapter/LOM. "
4336 "Please be aware there may be issues associated with "
4337 "your hardware. If you are experiencing problems "
4338 "please contact your Intel or hardware "
4339 "representative who provided you with this "
4340 "hardware.\n");
4341 break;
4342 default:
4343 e_dev_err("Hardware Error: %d\n", err);
4344 }
4345
4346 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
4347
4348 /* reprogram the RAR[0] in case user changed it. */
4349 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, VMDQ_P(0), IXGBE_RAH_AV);
4350
4351 /* update SAN MAC vmdq pool selection */
4352 if (hw->mac.san_mac_rar_index)
4353 hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));
4354
4355 if (adapter->flags2 & IXGBE_FLAG2_PTP_ENABLED)
4356 ixgbe_ptp_reset(adapter);
4357 }
4358
4359 /**
4360 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
4361 * @rx_ring: ring to free buffers from
4362 **/
4363 static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring)
4364 {
4365 struct device *dev = rx_ring->dev;
4366 unsigned long size;
4367 u16 i;
4368
4369 /* ring already cleared, nothing to do */
4370 if (!rx_ring->rx_buffer_info)
4371 return;
4372
4373 /* Free all the Rx ring sk_buffs */
4374 for (i = 0; i < rx_ring->count; i++) {
4375 struct ixgbe_rx_buffer *rx_buffer;
4376
4377 rx_buffer = &rx_ring->rx_buffer_info[i];
4378 if (rx_buffer->skb) {
4379 struct sk_buff *skb = rx_buffer->skb;
4380 if (IXGBE_CB(skb)->page_released) {
4381 dma_unmap_page(dev,
4382 IXGBE_CB(skb)->dma,
4383 ixgbe_rx_bufsz(rx_ring),
4384 DMA_FROM_DEVICE);
4385 IXGBE_CB(skb)->page_released = false;
4386 }
4387 dev_kfree_skb(skb);
4388 }
4389 rx_buffer->skb = NULL;
4390 if (rx_buffer->dma)
4391 dma_unmap_page(dev, rx_buffer->dma,
4392 ixgbe_rx_pg_size(rx_ring),
4393 DMA_FROM_DEVICE);
4394 rx_buffer->dma = 0;
4395 if (rx_buffer->page)
4396 __free_pages(rx_buffer->page,
4397 ixgbe_rx_pg_order(rx_ring));
4398 rx_buffer->page = NULL;
4399 }
4400
4401 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4402 memset(rx_ring->rx_buffer_info, 0, size);
4403
4404 /* Zero out the descriptor ring */
4405 memset(rx_ring->desc, 0, rx_ring->size);
4406
4407 rx_ring->next_to_alloc = 0;
4408 rx_ring->next_to_clean = 0;
4409 rx_ring->next_to_use = 0;
4410 }
4411
4412 /**
4413 * ixgbe_clean_tx_ring - Free Tx Buffers
4414 * @tx_ring: ring to be cleaned
4415 **/
4416 static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
4417 {
4418 struct ixgbe_tx_buffer *tx_buffer_info;
4419 unsigned long size;
4420 u16 i;
4421
4422 /* ring already cleared, nothing to do */
4423 if (!tx_ring->tx_buffer_info)
4424 return;
4425
4426 /* Free all the Tx ring sk_buffs */
4427 for (i = 0; i < tx_ring->count; i++) {
4428 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4429 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
4430 }
4431
4432 netdev_tx_reset_queue(txring_txq(tx_ring));
4433
4434 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
4435 memset(tx_ring->tx_buffer_info, 0, size);
4436
4437 /* Zero out the descriptor ring */
4438 memset(tx_ring->desc, 0, tx_ring->size);
4439
4440 tx_ring->next_to_use = 0;
4441 tx_ring->next_to_clean = 0;
4442 }
4443
4444 /**
4445 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
4446 * @adapter: board private structure
4447 **/
4448 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
4449 {
4450 int i;
4451
4452 for (i = 0; i < adapter->num_rx_queues; i++)
4453 ixgbe_clean_rx_ring(adapter->rx_ring[i]);
4454 }
4455
4456 /**
4457 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
4458 * @adapter: board private structure
4459 **/
4460 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
4461 {
4462 int i;
4463
4464 for (i = 0; i < adapter->num_tx_queues; i++)
4465 ixgbe_clean_tx_ring(adapter->tx_ring[i]);
4466 }
4467
4468 static void ixgbe_fdir_filter_exit(struct ixgbe_adapter *adapter)
4469 {
4470 struct hlist_node *node2;
4471 struct ixgbe_fdir_filter *filter;
4472
4473 spin_lock(&adapter->fdir_perfect_lock);
4474
4475 hlist_for_each_entry_safe(filter, node2,
4476 &adapter->fdir_filter_list, fdir_node) {
4477 hlist_del(&filter->fdir_node);
4478 kfree(filter);
4479 }
4480 adapter->fdir_filter_count = 0;
4481
4482 spin_unlock(&adapter->fdir_perfect_lock);
4483 }
4484
4485 void ixgbe_down(struct ixgbe_adapter *adapter)
4486 {
4487 struct net_device *netdev = adapter->netdev;
4488 struct ixgbe_hw *hw = &adapter->hw;
4489 u32 rxctrl;
4490 int i;
4491
4492 /* signal that we are down to the interrupt handler */
4493 set_bit(__IXGBE_DOWN, &adapter->state);
4494
4495 /* disable receives */
4496 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
4497 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
4498
4499 /* disable all enabled rx queues */
4500 for (i = 0; i < adapter->num_rx_queues; i++)
4501 /* this call also flushes the previous write */
4502 ixgbe_disable_rx_queue(adapter, adapter->rx_ring[i]);
4503
4504 usleep_range(10000, 20000);
4505
4506 netif_tx_stop_all_queues(netdev);
4507
4508 /* call carrier off first to avoid false dev_watchdog timeouts */
4509 netif_carrier_off(netdev);
4510 netif_tx_disable(netdev);
4511
4512 ixgbe_irq_disable(adapter);
4513
4514 ixgbe_napi_disable_all(adapter);
4515
4516 adapter->flags2 &= ~(IXGBE_FLAG2_FDIR_REQUIRES_REINIT |
4517 IXGBE_FLAG2_RESET_REQUESTED);
4518 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
4519
4520 del_timer_sync(&adapter->service_timer);
4521
4522 if (adapter->num_vfs) {
4523 /* Clear EITR Select mapping */
4524 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
4525
4526 /* Mark all the VFs as inactive */
4527 for (i = 0 ; i < adapter->num_vfs; i++)
4528 adapter->vfinfo[i].clear_to_send = false;
4529
4530 /* ping all the active vfs to let them know we are going down */
4531 ixgbe_ping_all_vfs(adapter);
4532
4533 /* Disable all VFTE/VFRE TX/RX */
4534 ixgbe_disable_tx_rx(adapter);
4535 }
4536
4537 /* disable transmits in the hardware now that interrupts are off */
4538 for (i = 0; i < adapter->num_tx_queues; i++) {
4539 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
4540 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
4541 }
4542
4543 /* Disable the Tx DMA engine on 82599 and X540 */
4544 switch (hw->mac.type) {
4545 case ixgbe_mac_82599EB:
4546 case ixgbe_mac_X540:
4547 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
4548 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
4549 ~IXGBE_DMATXCTL_TE));
4550 break;
4551 default:
4552 break;
4553 }
4554
4555 if (!pci_channel_offline(adapter->pdev))
4556 ixgbe_reset(adapter);
4557
4558 /* power down the optics for 82599 SFP+ fiber */
4559 if (hw->mac.ops.disable_tx_laser)
4560 hw->mac.ops.disable_tx_laser(hw);
4561
4562 ixgbe_clean_all_tx_rings(adapter);
4563 ixgbe_clean_all_rx_rings(adapter);
4564
4565 #ifdef CONFIG_IXGBE_DCA
4566 /* since we reset the hardware DCA settings were cleared */
4567 ixgbe_setup_dca(adapter);
4568 #endif
4569 }
4570
4571 /**
4572 * ixgbe_tx_timeout - Respond to a Tx Hang
4573 * @netdev: network interface device structure
4574 **/
4575 static void ixgbe_tx_timeout(struct net_device *netdev)
4576 {
4577 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4578
4579 /* Do the reset outside of interrupt context */
4580 ixgbe_tx_timeout_reset(adapter);
4581 }
4582
4583 /**
4584 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
4585 * @adapter: board private structure to initialize
4586 *
4587 * ixgbe_sw_init initializes the Adapter private data structure.
4588 * Fields are initialized based on PCI device information and
4589 * OS network device settings (MTU size).
4590 **/
4591 static int ixgbe_sw_init(struct ixgbe_adapter *adapter)
4592 {
4593 struct ixgbe_hw *hw = &adapter->hw;
4594 struct pci_dev *pdev = adapter->pdev;
4595 unsigned int rss, fdir;
4596 u32 fwsm;
4597 #ifdef CONFIG_IXGBE_DCB
4598 int j;
4599 struct tc_configuration *tc;
4600 #endif
4601
4602 /* PCI config space info */
4603
4604 hw->vendor_id = pdev->vendor;
4605 hw->device_id = pdev->device;
4606 hw->revision_id = pdev->revision;
4607 hw->subsystem_vendor_id = pdev->subsystem_vendor;
4608 hw->subsystem_device_id = pdev->subsystem_device;
4609
4610 /* Set common capability flags and settings */
4611 rss = min_t(int, IXGBE_MAX_RSS_INDICES, num_online_cpus());
4612 adapter->ring_feature[RING_F_RSS].limit = rss;
4613 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
4614 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
4615 adapter->max_q_vectors = MAX_Q_VECTORS_82599;
4616 adapter->atr_sample_rate = 20;
4617 fdir = min_t(int, IXGBE_MAX_FDIR_INDICES, num_online_cpus());
4618 adapter->ring_feature[RING_F_FDIR].limit = fdir;
4619 adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_64K;
4620 #ifdef CONFIG_IXGBE_DCA
4621 adapter->flags |= IXGBE_FLAG_DCA_CAPABLE;
4622 #endif
4623 #ifdef IXGBE_FCOE
4624 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
4625 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
4626 #ifdef CONFIG_IXGBE_DCB
4627 /* Default traffic class to use for FCoE */
4628 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
4629 #endif /* CONFIG_IXGBE_DCB */
4630 #endif /* IXGBE_FCOE */
4631
4632 /* Set MAC specific capability flags and exceptions */
4633 switch (hw->mac.type) {
4634 case ixgbe_mac_82598EB:
4635 adapter->flags2 &= ~IXGBE_FLAG2_RSC_CAPABLE;
4636 adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED;
4637
4638 if (hw->device_id == IXGBE_DEV_ID_82598AT)
4639 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
4640
4641 adapter->max_q_vectors = MAX_Q_VECTORS_82598;
4642 adapter->ring_feature[RING_F_FDIR].limit = 0;
4643 adapter->atr_sample_rate = 0;
4644 adapter->fdir_pballoc = 0;
4645 #ifdef IXGBE_FCOE
4646 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
4647 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
4648 #ifdef CONFIG_IXGBE_DCB
4649 adapter->fcoe.up = 0;
4650 #endif /* IXGBE_DCB */
4651 #endif /* IXGBE_FCOE */
4652 break;
4653 case ixgbe_mac_82599EB:
4654 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
4655 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
4656 break;
4657 case ixgbe_mac_X540:
4658 fwsm = IXGBE_READ_REG(hw, IXGBE_FWSM);
4659 if (fwsm & IXGBE_FWSM_TS_ENABLED)
4660 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
4661 break;
4662 default:
4663 break;
4664 }
4665
4666 #ifdef IXGBE_FCOE
4667 /* FCoE support exists, always init the FCoE lock */
4668 spin_lock_init(&adapter->fcoe.lock);
4669
4670 #endif
4671 /* n-tuple support exists, always init our spinlock */
4672 spin_lock_init(&adapter->fdir_perfect_lock);
4673
4674 #ifdef CONFIG_IXGBE_DCB
4675 switch (hw->mac.type) {
4676 case ixgbe_mac_X540:
4677 adapter->dcb_cfg.num_tcs.pg_tcs = X540_TRAFFIC_CLASS;
4678 adapter->dcb_cfg.num_tcs.pfc_tcs = X540_TRAFFIC_CLASS;
4679 break;
4680 default:
4681 adapter->dcb_cfg.num_tcs.pg_tcs = MAX_TRAFFIC_CLASS;
4682 adapter->dcb_cfg.num_tcs.pfc_tcs = MAX_TRAFFIC_CLASS;
4683 break;
4684 }
4685
4686 /* Configure DCB traffic classes */
4687 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
4688 tc = &adapter->dcb_cfg.tc_config[j];
4689 tc->path[DCB_TX_CONFIG].bwg_id = 0;
4690 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
4691 tc->path[DCB_RX_CONFIG].bwg_id = 0;
4692 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
4693 tc->dcb_pfc = pfc_disabled;
4694 }
4695
4696 /* Initialize default user to priority mapping, UPx->TC0 */
4697 tc = &adapter->dcb_cfg.tc_config[0];
4698 tc->path[DCB_TX_CONFIG].up_to_tc_bitmap = 0xFF;
4699 tc->path[DCB_RX_CONFIG].up_to_tc_bitmap = 0xFF;
4700
4701 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
4702 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
4703 adapter->dcb_cfg.pfc_mode_enable = false;
4704 adapter->dcb_set_bitmap = 0x00;
4705 adapter->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE;
4706 memcpy(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
4707 sizeof(adapter->temp_dcb_cfg));
4708
4709 #endif
4710
4711 /* default flow control settings */
4712 hw->fc.requested_mode = ixgbe_fc_full;
4713 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
4714 ixgbe_pbthresh_setup(adapter);
4715 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
4716 hw->fc.send_xon = true;
4717 hw->fc.disable_fc_autoneg =
4718 (ixgbe_device_supports_autoneg_fc(hw) == 0) ? false : true;
4719
4720 #ifdef CONFIG_PCI_IOV
4721 /* assign number of SR-IOV VFs */
4722 if (hw->mac.type != ixgbe_mac_82598EB)
4723 adapter->num_vfs = (max_vfs > 63) ? 0 : max_vfs;
4724
4725 #endif
4726 /* enable itr by default in dynamic mode */
4727 adapter->rx_itr_setting = 1;
4728 adapter->tx_itr_setting = 1;
4729
4730 /* set default ring sizes */
4731 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
4732 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
4733
4734 /* set default work limits */
4735 adapter->tx_work_limit = IXGBE_DEFAULT_TX_WORK;
4736
4737 /* initialize eeprom parameters */
4738 if (ixgbe_init_eeprom_params_generic(hw)) {
4739 e_dev_err("EEPROM initialization failed\n");
4740 return -EIO;
4741 }
4742
4743 set_bit(__IXGBE_DOWN, &adapter->state);
4744
4745 return 0;
4746 }
4747
4748 /**
4749 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
4750 * @tx_ring: tx descriptor ring (for a specific queue) to setup
4751 *
4752 * Return 0 on success, negative on failure
4753 **/
4754 int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
4755 {
4756 struct device *dev = tx_ring->dev;
4757 int orig_node = dev_to_node(dev);
4758 int numa_node = -1;
4759 int size;
4760
4761 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
4762
4763 if (tx_ring->q_vector)
4764 numa_node = tx_ring->q_vector->numa_node;
4765
4766 tx_ring->tx_buffer_info = vzalloc_node(size, numa_node);
4767 if (!tx_ring->tx_buffer_info)
4768 tx_ring->tx_buffer_info = vzalloc(size);
4769 if (!tx_ring->tx_buffer_info)
4770 goto err;
4771
4772 /* round up to nearest 4K */
4773 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
4774 tx_ring->size = ALIGN(tx_ring->size, 4096);
4775
4776 set_dev_node(dev, numa_node);
4777 tx_ring->desc = dma_alloc_coherent(dev,
4778 tx_ring->size,
4779 &tx_ring->dma,
4780 GFP_KERNEL);
4781 set_dev_node(dev, orig_node);
4782 if (!tx_ring->desc)
4783 tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
4784 &tx_ring->dma, GFP_KERNEL);
4785 if (!tx_ring->desc)
4786 goto err;
4787
4788 tx_ring->next_to_use = 0;
4789 tx_ring->next_to_clean = 0;
4790 return 0;
4791
4792 err:
4793 vfree(tx_ring->tx_buffer_info);
4794 tx_ring->tx_buffer_info = NULL;
4795 dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n");
4796 return -ENOMEM;
4797 }
4798
4799 /**
4800 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
4801 * @adapter: board private structure
4802 *
4803 * If this function returns with an error, then it's possible one or
4804 * more of the rings is populated (while the rest are not). It is the
4805 * callers duty to clean those orphaned rings.
4806 *
4807 * Return 0 on success, negative on failure
4808 **/
4809 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
4810 {
4811 int i, err = 0;
4812
4813 for (i = 0; i < adapter->num_tx_queues; i++) {
4814 err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
4815 if (!err)
4816 continue;
4817
4818 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
4819 goto err_setup_tx;
4820 }
4821
4822 return 0;
4823 err_setup_tx:
4824 /* rewind the index freeing the rings as we go */
4825 while (i--)
4826 ixgbe_free_tx_resources(adapter->tx_ring[i]);
4827 return err;
4828 }
4829
4830 /**
4831 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
4832 * @rx_ring: rx descriptor ring (for a specific queue) to setup
4833 *
4834 * Returns 0 on success, negative on failure
4835 **/
4836 int ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring)
4837 {
4838 struct device *dev = rx_ring->dev;
4839 int orig_node = dev_to_node(dev);
4840 int numa_node = -1;
4841 int size;
4842
4843 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4844
4845 if (rx_ring->q_vector)
4846 numa_node = rx_ring->q_vector->numa_node;
4847
4848 rx_ring->rx_buffer_info = vzalloc_node(size, numa_node);
4849 if (!rx_ring->rx_buffer_info)
4850 rx_ring->rx_buffer_info = vzalloc(size);
4851 if (!rx_ring->rx_buffer_info)
4852 goto err;
4853
4854 /* Round up to nearest 4K */
4855 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
4856 rx_ring->size = ALIGN(rx_ring->size, 4096);
4857
4858 set_dev_node(dev, numa_node);
4859 rx_ring->desc = dma_alloc_coherent(dev,
4860 rx_ring->size,
4861 &rx_ring->dma,
4862 GFP_KERNEL);
4863 set_dev_node(dev, orig_node);
4864 if (!rx_ring->desc)
4865 rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
4866 &rx_ring->dma, GFP_KERNEL);
4867 if (!rx_ring->desc)
4868 goto err;
4869
4870 rx_ring->next_to_clean = 0;
4871 rx_ring->next_to_use = 0;
4872
4873 return 0;
4874 err:
4875 vfree(rx_ring->rx_buffer_info);
4876 rx_ring->rx_buffer_info = NULL;
4877 dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");
4878 return -ENOMEM;
4879 }
4880
4881 /**
4882 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
4883 * @adapter: board private structure
4884 *
4885 * If this function returns with an error, then it's possible one or
4886 * more of the rings is populated (while the rest are not). It is the
4887 * callers duty to clean those orphaned rings.
4888 *
4889 * Return 0 on success, negative on failure
4890 **/
4891 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
4892 {
4893 int i, err = 0;
4894
4895 for (i = 0; i < adapter->num_rx_queues; i++) {
4896 err = ixgbe_setup_rx_resources(adapter->rx_ring[i]);
4897 if (!err)
4898 continue;
4899
4900 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
4901 goto err_setup_rx;
4902 }
4903
4904 #ifdef IXGBE_FCOE
4905 err = ixgbe_setup_fcoe_ddp_resources(adapter);
4906 if (!err)
4907 #endif
4908 return 0;
4909 err_setup_rx:
4910 /* rewind the index freeing the rings as we go */
4911 while (i--)
4912 ixgbe_free_rx_resources(adapter->rx_ring[i]);
4913 return err;
4914 }
4915
4916 /**
4917 * ixgbe_free_tx_resources - Free Tx Resources per Queue
4918 * @tx_ring: Tx descriptor ring for a specific queue
4919 *
4920 * Free all transmit software resources
4921 **/
4922 void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring)
4923 {
4924 ixgbe_clean_tx_ring(tx_ring);
4925
4926 vfree(tx_ring->tx_buffer_info);
4927 tx_ring->tx_buffer_info = NULL;
4928
4929 /* if not set, then don't free */
4930 if (!tx_ring->desc)
4931 return;
4932
4933 dma_free_coherent(tx_ring->dev, tx_ring->size,
4934 tx_ring->desc, tx_ring->dma);
4935
4936 tx_ring->desc = NULL;
4937 }
4938
4939 /**
4940 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
4941 * @adapter: board private structure
4942 *
4943 * Free all transmit software resources
4944 **/
4945 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
4946 {
4947 int i;
4948
4949 for (i = 0; i < adapter->num_tx_queues; i++)
4950 if (adapter->tx_ring[i]->desc)
4951 ixgbe_free_tx_resources(adapter->tx_ring[i]);
4952 }
4953
4954 /**
4955 * ixgbe_free_rx_resources - Free Rx Resources
4956 * @rx_ring: ring to clean the resources from
4957 *
4958 * Free all receive software resources
4959 **/
4960 void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring)
4961 {
4962 ixgbe_clean_rx_ring(rx_ring);
4963
4964 vfree(rx_ring->rx_buffer_info);
4965 rx_ring->rx_buffer_info = NULL;
4966
4967 /* if not set, then don't free */
4968 if (!rx_ring->desc)
4969 return;
4970
4971 dma_free_coherent(rx_ring->dev, rx_ring->size,
4972 rx_ring->desc, rx_ring->dma);
4973
4974 rx_ring->desc = NULL;
4975 }
4976
4977 /**
4978 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
4979 * @adapter: board private structure
4980 *
4981 * Free all receive software resources
4982 **/
4983 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
4984 {
4985 int i;
4986
4987 #ifdef IXGBE_FCOE
4988 ixgbe_free_fcoe_ddp_resources(adapter);
4989
4990 #endif
4991 for (i = 0; i < adapter->num_rx_queues; i++)
4992 if (adapter->rx_ring[i]->desc)
4993 ixgbe_free_rx_resources(adapter->rx_ring[i]);
4994 }
4995
4996 /**
4997 * ixgbe_change_mtu - Change the Maximum Transfer Unit
4998 * @netdev: network interface device structure
4999 * @new_mtu: new value for maximum frame size
5000 *
5001 * Returns 0 on success, negative on failure
5002 **/
5003 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
5004 {
5005 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5006 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5007
5008 /* MTU < 68 is an error and causes problems on some kernels */
5009 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
5010 return -EINVAL;
5011
5012 /*
5013 * For 82599EB we cannot allow legacy VFs to enable their receive
5014 * paths when MTU greater than 1500 is configured. So display a
5015 * warning that legacy VFs will be disabled.
5016 */
5017 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) &&
5018 (adapter->hw.mac.type == ixgbe_mac_82599EB) &&
5019 (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)))
5020 e_warn(probe, "Setting MTU > 1500 will disable legacy VFs\n");
5021
5022 e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5023
5024 /* must set new MTU before calling down or up */
5025 netdev->mtu = new_mtu;
5026
5027 if (netif_running(netdev))
5028 ixgbe_reinit_locked(adapter);
5029
5030 return 0;
5031 }
5032
5033 /**
5034 * ixgbe_open - Called when a network interface is made active
5035 * @netdev: network interface device structure
5036 *
5037 * Returns 0 on success, negative value on failure
5038 *
5039 * The open entry point is called when a network interface is made
5040 * active by the system (IFF_UP). At this point all resources needed
5041 * for transmit and receive operations are allocated, the interrupt
5042 * handler is registered with the OS, the watchdog timer is started,
5043 * and the stack is notified that the interface is ready.
5044 **/
5045 static int ixgbe_open(struct net_device *netdev)
5046 {
5047 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5048 int err;
5049
5050 /* disallow open during test */
5051 if (test_bit(__IXGBE_TESTING, &adapter->state))
5052 return -EBUSY;
5053
5054 netif_carrier_off(netdev);
5055
5056 /* allocate transmit descriptors */
5057 err = ixgbe_setup_all_tx_resources(adapter);
5058 if (err)
5059 goto err_setup_tx;
5060
5061 /* allocate receive descriptors */
5062 err = ixgbe_setup_all_rx_resources(adapter);
5063 if (err)
5064 goto err_setup_rx;
5065
5066 ixgbe_configure(adapter);
5067
5068 err = ixgbe_request_irq(adapter);
5069 if (err)
5070 goto err_req_irq;
5071
5072 /* Notify the stack of the actual queue counts. */
5073 err = netif_set_real_num_tx_queues(netdev,
5074 adapter->num_rx_pools > 1 ? 1 :
5075 adapter->num_tx_queues);
5076 if (err)
5077 goto err_set_queues;
5078
5079
5080 err = netif_set_real_num_rx_queues(netdev,
5081 adapter->num_rx_pools > 1 ? 1 :
5082 adapter->num_rx_queues);
5083 if (err)
5084 goto err_set_queues;
5085
5086 ixgbe_ptp_init(adapter);
5087
5088 ixgbe_up_complete(adapter);
5089
5090 return 0;
5091
5092 err_set_queues:
5093 ixgbe_free_irq(adapter);
5094 err_req_irq:
5095 ixgbe_free_all_rx_resources(adapter);
5096 err_setup_rx:
5097 ixgbe_free_all_tx_resources(adapter);
5098 err_setup_tx:
5099 ixgbe_reset(adapter);
5100
5101 return err;
5102 }
5103
5104 /**
5105 * ixgbe_close - Disables a network interface
5106 * @netdev: network interface device structure
5107 *
5108 * Returns 0, this is not allowed to fail
5109 *
5110 * The close entry point is called when an interface is de-activated
5111 * by the OS. The hardware is still under the drivers control, but
5112 * needs to be disabled. A global MAC reset is issued to stop the
5113 * hardware, and all transmit and receive resources are freed.
5114 **/
5115 static int ixgbe_close(struct net_device *netdev)
5116 {
5117 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5118
5119 ixgbe_ptp_stop(adapter);
5120
5121 ixgbe_down(adapter);
5122 ixgbe_free_irq(adapter);
5123
5124 ixgbe_fdir_filter_exit(adapter);
5125
5126 ixgbe_free_all_tx_resources(adapter);
5127 ixgbe_free_all_rx_resources(adapter);
5128
5129 ixgbe_release_hw_control(adapter);
5130
5131 return 0;
5132 }
5133
5134 #ifdef CONFIG_PM
5135 static int ixgbe_resume(struct pci_dev *pdev)
5136 {
5137 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5138 struct net_device *netdev = adapter->netdev;
5139 u32 err;
5140
5141 pci_set_power_state(pdev, PCI_D0);
5142 pci_restore_state(pdev);
5143 /*
5144 * pci_restore_state clears dev->state_saved so call
5145 * pci_save_state to restore it.
5146 */
5147 pci_save_state(pdev);
5148
5149 err = pci_enable_device_mem(pdev);
5150 if (err) {
5151 e_dev_err("Cannot enable PCI device from suspend\n");
5152 return err;
5153 }
5154 pci_set_master(pdev);
5155
5156 pci_wake_from_d3(pdev, false);
5157
5158 ixgbe_reset(adapter);
5159
5160 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5161
5162 rtnl_lock();
5163 err = ixgbe_init_interrupt_scheme(adapter);
5164 if (!err && netif_running(netdev))
5165 err = ixgbe_open(netdev);
5166
5167 rtnl_unlock();
5168
5169 if (err)
5170 return err;
5171
5172 netif_device_attach(netdev);
5173
5174 return 0;
5175 }
5176 #endif /* CONFIG_PM */
5177
5178 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
5179 {
5180 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5181 struct net_device *netdev = adapter->netdev;
5182 struct ixgbe_hw *hw = &adapter->hw;
5183 u32 ctrl, fctrl;
5184 u32 wufc = adapter->wol;
5185 #ifdef CONFIG_PM
5186 int retval = 0;
5187 #endif
5188
5189 netif_device_detach(netdev);
5190
5191 rtnl_lock();
5192 if (netif_running(netdev)) {
5193 ixgbe_down(adapter);
5194 ixgbe_free_irq(adapter);
5195 ixgbe_free_all_tx_resources(adapter);
5196 ixgbe_free_all_rx_resources(adapter);
5197 }
5198 rtnl_unlock();
5199
5200 ixgbe_clear_interrupt_scheme(adapter);
5201
5202 #ifdef CONFIG_PM
5203 retval = pci_save_state(pdev);
5204 if (retval)
5205 return retval;
5206
5207 #endif
5208 if (wufc) {
5209 ixgbe_set_rx_mode(netdev);
5210
5211 /* enable the optics for 82599 SFP+ fiber as we can WoL */
5212 if (hw->mac.ops.enable_tx_laser)
5213 hw->mac.ops.enable_tx_laser(hw);
5214
5215 /* turn on all-multi mode if wake on multicast is enabled */
5216 if (wufc & IXGBE_WUFC_MC) {
5217 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5218 fctrl |= IXGBE_FCTRL_MPE;
5219 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
5220 }
5221
5222 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
5223 ctrl |= IXGBE_CTRL_GIO_DIS;
5224 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
5225
5226 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
5227 } else {
5228 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
5229 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
5230 }
5231
5232 switch (hw->mac.type) {
5233 case ixgbe_mac_82598EB:
5234 pci_wake_from_d3(pdev, false);
5235 break;
5236 case ixgbe_mac_82599EB:
5237 case ixgbe_mac_X540:
5238 pci_wake_from_d3(pdev, !!wufc);
5239 break;
5240 default:
5241 break;
5242 }
5243
5244 *enable_wake = !!wufc;
5245
5246 ixgbe_release_hw_control(adapter);
5247
5248 pci_disable_device(pdev);
5249
5250 return 0;
5251 }
5252
5253 #ifdef CONFIG_PM
5254 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
5255 {
5256 int retval;
5257 bool wake;
5258
5259 retval = __ixgbe_shutdown(pdev, &wake);
5260 if (retval)
5261 return retval;
5262
5263 if (wake) {
5264 pci_prepare_to_sleep(pdev);
5265 } else {
5266 pci_wake_from_d3(pdev, false);
5267 pci_set_power_state(pdev, PCI_D3hot);
5268 }
5269
5270 return 0;
5271 }
5272 #endif /* CONFIG_PM */
5273
5274 static void ixgbe_shutdown(struct pci_dev *pdev)
5275 {
5276 bool wake;
5277
5278 __ixgbe_shutdown(pdev, &wake);
5279
5280 if (system_state == SYSTEM_POWER_OFF) {
5281 pci_wake_from_d3(pdev, wake);
5282 pci_set_power_state(pdev, PCI_D3hot);
5283 }
5284 }
5285
5286 /**
5287 * ixgbe_update_stats - Update the board statistics counters.
5288 * @adapter: board private structure
5289 **/
5290 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
5291 {
5292 struct net_device *netdev = adapter->netdev;
5293 struct ixgbe_hw *hw = &adapter->hw;
5294 struct ixgbe_hw_stats *hwstats = &adapter->stats;
5295 u64 total_mpc = 0;
5296 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
5297 u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
5298 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
5299 u64 bytes = 0, packets = 0, hw_csum_rx_error = 0;
5300
5301 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5302 test_bit(__IXGBE_RESETTING, &adapter->state))
5303 return;
5304
5305 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
5306 u64 rsc_count = 0;
5307 u64 rsc_flush = 0;
5308 for (i = 0; i < adapter->num_rx_queues; i++) {
5309 rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
5310 rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
5311 }
5312 adapter->rsc_total_count = rsc_count;
5313 adapter->rsc_total_flush = rsc_flush;
5314 }
5315
5316 for (i = 0; i < adapter->num_rx_queues; i++) {
5317 struct ixgbe_ring *rx_ring = adapter->rx_ring[i];
5318 non_eop_descs += rx_ring->rx_stats.non_eop_descs;
5319 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
5320 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
5321 hw_csum_rx_error += rx_ring->rx_stats.csum_err;
5322 bytes += rx_ring->stats.bytes;
5323 packets += rx_ring->stats.packets;
5324 }
5325 adapter->non_eop_descs = non_eop_descs;
5326 adapter->alloc_rx_page_failed = alloc_rx_page_failed;
5327 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
5328 adapter->hw_csum_rx_error = hw_csum_rx_error;
5329 netdev->stats.rx_bytes = bytes;
5330 netdev->stats.rx_packets = packets;
5331
5332 bytes = 0;
5333 packets = 0;
5334 /* gather some stats to the adapter struct that are per queue */
5335 for (i = 0; i < adapter->num_tx_queues; i++) {
5336 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
5337 restart_queue += tx_ring->tx_stats.restart_queue;
5338 tx_busy += tx_ring->tx_stats.tx_busy;
5339 bytes += tx_ring->stats.bytes;
5340 packets += tx_ring->stats.packets;
5341 }
5342 adapter->restart_queue = restart_queue;
5343 adapter->tx_busy = tx_busy;
5344 netdev->stats.tx_bytes = bytes;
5345 netdev->stats.tx_packets = packets;
5346
5347 hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
5348
5349 /* 8 register reads */
5350 for (i = 0; i < 8; i++) {
5351 /* for packet buffers not used, the register should read 0 */
5352 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
5353 missed_rx += mpc;
5354 hwstats->mpc[i] += mpc;
5355 total_mpc += hwstats->mpc[i];
5356 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
5357 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
5358 switch (hw->mac.type) {
5359 case ixgbe_mac_82598EB:
5360 hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
5361 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
5362 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
5363 hwstats->pxonrxc[i] +=
5364 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
5365 break;
5366 case ixgbe_mac_82599EB:
5367 case ixgbe_mac_X540:
5368 hwstats->pxonrxc[i] +=
5369 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
5370 break;
5371 default:
5372 break;
5373 }
5374 }
5375
5376 /*16 register reads */
5377 for (i = 0; i < 16; i++) {
5378 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
5379 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
5380 if ((hw->mac.type == ixgbe_mac_82599EB) ||
5381 (hw->mac.type == ixgbe_mac_X540)) {
5382 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
5383 IXGBE_READ_REG(hw, IXGBE_QBTC_H(i)); /* to clear */
5384 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC_L(i));
5385 IXGBE_READ_REG(hw, IXGBE_QBRC_H(i)); /* to clear */
5386 }
5387 }
5388
5389 hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
5390 /* work around hardware counting issue */
5391 hwstats->gprc -= missed_rx;
5392
5393 ixgbe_update_xoff_received(adapter);
5394
5395 /* 82598 hardware only has a 32 bit counter in the high register */
5396 switch (hw->mac.type) {
5397 case ixgbe_mac_82598EB:
5398 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
5399 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
5400 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
5401 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
5402 break;
5403 case ixgbe_mac_X540:
5404 /* OS2BMC stats are X540 only*/
5405 hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC);
5406 hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC);
5407 hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC);
5408 hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC);
5409 case ixgbe_mac_82599EB:
5410 for (i = 0; i < 16; i++)
5411 adapter->hw_rx_no_dma_resources +=
5412 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5413 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
5414 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
5415 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
5416 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
5417 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
5418 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
5419 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
5420 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
5421 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
5422 #ifdef IXGBE_FCOE
5423 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
5424 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
5425 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
5426 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
5427 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
5428 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
5429 /* Add up per cpu counters for total ddp aloc fail */
5430 if (adapter->fcoe.ddp_pool) {
5431 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
5432 struct ixgbe_fcoe_ddp_pool *ddp_pool;
5433 unsigned int cpu;
5434 u64 noddp = 0, noddp_ext_buff = 0;
5435 for_each_possible_cpu(cpu) {
5436 ddp_pool = per_cpu_ptr(fcoe->ddp_pool, cpu);
5437 noddp += ddp_pool->noddp;
5438 noddp_ext_buff += ddp_pool->noddp_ext_buff;
5439 }
5440 hwstats->fcoe_noddp = noddp;
5441 hwstats->fcoe_noddp_ext_buff = noddp_ext_buff;
5442 }
5443 #endif /* IXGBE_FCOE */
5444 break;
5445 default:
5446 break;
5447 }
5448 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
5449 hwstats->bprc += bprc;
5450 hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
5451 if (hw->mac.type == ixgbe_mac_82598EB)
5452 hwstats->mprc -= bprc;
5453 hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
5454 hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
5455 hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
5456 hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
5457 hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
5458 hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
5459 hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
5460 hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
5461 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
5462 hwstats->lxontxc += lxon;
5463 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
5464 hwstats->lxofftxc += lxoff;
5465 hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
5466 hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
5467 /*
5468 * 82598 errata - tx of flow control packets is included in tx counters
5469 */
5470 xon_off_tot = lxon + lxoff;
5471 hwstats->gptc -= xon_off_tot;
5472 hwstats->mptc -= xon_off_tot;
5473 hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
5474 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5475 hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
5476 hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
5477 hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
5478 hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
5479 hwstats->ptc64 -= xon_off_tot;
5480 hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
5481 hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
5482 hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
5483 hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
5484 hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
5485 hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
5486
5487 /* Fill out the OS statistics structure */
5488 netdev->stats.multicast = hwstats->mprc;
5489
5490 /* Rx Errors */
5491 netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
5492 netdev->stats.rx_dropped = 0;
5493 netdev->stats.rx_length_errors = hwstats->rlec;
5494 netdev->stats.rx_crc_errors = hwstats->crcerrs;
5495 netdev->stats.rx_missed_errors = total_mpc;
5496 }
5497
5498 /**
5499 * ixgbe_fdir_reinit_subtask - worker thread to reinit FDIR filter table
5500 * @adapter: pointer to the device adapter structure
5501 **/
5502 static void ixgbe_fdir_reinit_subtask(struct ixgbe_adapter *adapter)
5503 {
5504 struct ixgbe_hw *hw = &adapter->hw;
5505 int i;
5506
5507 if (!(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
5508 return;
5509
5510 adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
5511
5512 /* if interface is down do nothing */
5513 if (test_bit(__IXGBE_DOWN, &adapter->state))
5514 return;
5515
5516 /* do nothing if we are not using signature filters */
5517 if (!(adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE))
5518 return;
5519
5520 adapter->fdir_overflow++;
5521
5522 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
5523 for (i = 0; i < adapter->num_tx_queues; i++)
5524 set_bit(__IXGBE_TX_FDIR_INIT_DONE,
5525 &(adapter->tx_ring[i]->state));
5526 /* re-enable flow director interrupts */
5527 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
5528 } else {
5529 e_err(probe, "failed to finish FDIR re-initialization, "
5530 "ignored adding FDIR ATR filters\n");
5531 }
5532 }
5533
5534 /**
5535 * ixgbe_check_hang_subtask - check for hung queues and dropped interrupts
5536 * @adapter: pointer to the device adapter structure
5537 *
5538 * This function serves two purposes. First it strobes the interrupt lines
5539 * in order to make certain interrupts are occurring. Secondly it sets the
5540 * bits needed to check for TX hangs. As a result we should immediately
5541 * determine if a hang has occurred.
5542 */
5543 static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter)
5544 {
5545 struct ixgbe_hw *hw = &adapter->hw;
5546 u64 eics = 0;
5547 int i;
5548
5549 /* If we're down or resetting, just bail */
5550 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5551 test_bit(__IXGBE_RESETTING, &adapter->state))
5552 return;
5553
5554 /* Force detection of hung controller */
5555 if (netif_carrier_ok(adapter->netdev)) {
5556 for (i = 0; i < adapter->num_tx_queues; i++)
5557 set_check_for_tx_hang(adapter->tx_ring[i]);
5558 }
5559
5560 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
5561 /*
5562 * for legacy and MSI interrupts don't set any bits
5563 * that are enabled for EIAM, because this operation
5564 * would set *both* EIMS and EICS for any bit in EIAM
5565 */
5566 IXGBE_WRITE_REG(hw, IXGBE_EICS,
5567 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
5568 } else {
5569 /* get one bit for every active tx/rx interrupt vector */
5570 for (i = 0; i < adapter->num_q_vectors; i++) {
5571 struct ixgbe_q_vector *qv = adapter->q_vector[i];
5572 if (qv->rx.ring || qv->tx.ring)
5573 eics |= ((u64)1 << i);
5574 }
5575 }
5576
5577 /* Cause software interrupt to ensure rings are cleaned */
5578 ixgbe_irq_rearm_queues(adapter, eics);
5579
5580 }
5581
5582 /**
5583 * ixgbe_watchdog_update_link - update the link status
5584 * @adapter: pointer to the device adapter structure
5585 * @link_speed: pointer to a u32 to store the link_speed
5586 **/
5587 static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter)
5588 {
5589 struct ixgbe_hw *hw = &adapter->hw;
5590 u32 link_speed = adapter->link_speed;
5591 bool link_up = adapter->link_up;
5592 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
5593
5594 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
5595 return;
5596
5597 if (hw->mac.ops.check_link) {
5598 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
5599 } else {
5600 /* always assume link is up, if no check link function */
5601 link_speed = IXGBE_LINK_SPEED_10GB_FULL;
5602 link_up = true;
5603 }
5604
5605 if (adapter->ixgbe_ieee_pfc)
5606 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
5607
5608 if (link_up && !((adapter->flags & IXGBE_FLAG_DCB_ENABLED) && pfc_en)) {
5609 hw->mac.ops.fc_enable(hw);
5610 ixgbe_set_rx_drop_en(adapter);
5611 }
5612
5613 if (link_up ||
5614 time_after(jiffies, (adapter->link_check_timeout +
5615 IXGBE_TRY_LINK_TIMEOUT))) {
5616 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5617 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
5618 IXGBE_WRITE_FLUSH(hw);
5619 }
5620
5621 adapter->link_up = link_up;
5622 adapter->link_speed = link_speed;
5623 }
5624
5625 static void ixgbe_update_default_up(struct ixgbe_adapter *adapter)
5626 {
5627 #ifdef CONFIG_IXGBE_DCB
5628 struct net_device *netdev = adapter->netdev;
5629 struct dcb_app app = {
5630 .selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE,
5631 .protocol = 0,
5632 };
5633 u8 up = 0;
5634
5635 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_IEEE)
5636 up = dcb_ieee_getapp_mask(netdev, &app);
5637
5638 adapter->default_up = (up > 1) ? (ffs(up) - 1) : 0;
5639 #endif
5640 }
5641
5642 /**
5643 * ixgbe_watchdog_link_is_up - update netif_carrier status and
5644 * print link up message
5645 * @adapter: pointer to the device adapter structure
5646 **/
5647 static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
5648 {
5649 struct net_device *netdev = adapter->netdev;
5650 struct ixgbe_hw *hw = &adapter->hw;
5651 u32 link_speed = adapter->link_speed;
5652 bool flow_rx, flow_tx;
5653
5654 /* only continue if link was previously down */
5655 if (netif_carrier_ok(netdev))
5656 return;
5657
5658 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
5659
5660 switch (hw->mac.type) {
5661 case ixgbe_mac_82598EB: {
5662 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5663 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
5664 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
5665 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
5666 }
5667 break;
5668 case ixgbe_mac_X540:
5669 case ixgbe_mac_82599EB: {
5670 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
5671 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
5672 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
5673 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
5674 }
5675 break;
5676 default:
5677 flow_tx = false;
5678 flow_rx = false;
5679 break;
5680 }
5681
5682 adapter->last_rx_ptp_check = jiffies;
5683
5684 if (adapter->flags2 & IXGBE_FLAG2_PTP_ENABLED)
5685 ixgbe_ptp_start_cyclecounter(adapter);
5686
5687 e_info(drv, "NIC Link is Up %s, Flow Control: %s\n",
5688 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
5689 "10 Gbps" :
5690 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
5691 "1 Gbps" :
5692 (link_speed == IXGBE_LINK_SPEED_100_FULL ?
5693 "100 Mbps" :
5694 "unknown speed"))),
5695 ((flow_rx && flow_tx) ? "RX/TX" :
5696 (flow_rx ? "RX" :
5697 (flow_tx ? "TX" : "None"))));
5698
5699 netif_carrier_on(netdev);
5700 ixgbe_check_vf_rate_limit(adapter);
5701
5702 /* update the default user priority for VFs */
5703 ixgbe_update_default_up(adapter);
5704
5705 /* ping all the active vfs to let them know link has changed */
5706 ixgbe_ping_all_vfs(adapter);
5707 }
5708
5709 /**
5710 * ixgbe_watchdog_link_is_down - update netif_carrier status and
5711 * print link down message
5712 * @adapter: pointer to the adapter structure
5713 **/
5714 static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter *adapter)
5715 {
5716 struct net_device *netdev = adapter->netdev;
5717 struct ixgbe_hw *hw = &adapter->hw;
5718
5719 adapter->link_up = false;
5720 adapter->link_speed = 0;
5721
5722 /* only continue if link was up previously */
5723 if (!netif_carrier_ok(netdev))
5724 return;
5725
5726 /* poll for SFP+ cable when link is down */
5727 if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB)
5728 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
5729
5730 if (adapter->flags2 & IXGBE_FLAG2_PTP_ENABLED)
5731 ixgbe_ptp_start_cyclecounter(adapter);
5732
5733 e_info(drv, "NIC Link is Down\n");
5734 netif_carrier_off(netdev);
5735
5736 /* ping all the active vfs to let them know link has changed */
5737 ixgbe_ping_all_vfs(adapter);
5738 }
5739
5740 /**
5741 * ixgbe_watchdog_flush_tx - flush queues on link down
5742 * @adapter: pointer to the device adapter structure
5743 **/
5744 static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter)
5745 {
5746 int i;
5747 int some_tx_pending = 0;
5748
5749 if (!netif_carrier_ok(adapter->netdev)) {
5750 for (i = 0; i < adapter->num_tx_queues; i++) {
5751 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
5752 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
5753 some_tx_pending = 1;
5754 break;
5755 }
5756 }
5757
5758 if (some_tx_pending) {
5759 /* We've lost link, so the controller stops DMA,
5760 * but we've got queued Tx work that's never going
5761 * to get done, so reset controller to flush Tx.
5762 * (Do the reset outside of interrupt context).
5763 */
5764 e_warn(drv, "initiating reset to clear Tx work after link loss\n");
5765 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
5766 }
5767 }
5768 }
5769
5770 static void ixgbe_spoof_check(struct ixgbe_adapter *adapter)
5771 {
5772 u32 ssvpc;
5773
5774 /* Do not perform spoof check for 82598 or if not in IOV mode */
5775 if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
5776 adapter->num_vfs == 0)
5777 return;
5778
5779 ssvpc = IXGBE_READ_REG(&adapter->hw, IXGBE_SSVPC);
5780
5781 /*
5782 * ssvpc register is cleared on read, if zero then no
5783 * spoofed packets in the last interval.
5784 */
5785 if (!ssvpc)
5786 return;
5787
5788 e_warn(drv, "%u Spoofed packets detected\n", ssvpc);
5789 }
5790
5791 /**
5792 * ixgbe_watchdog_subtask - check and bring link up
5793 * @adapter: pointer to the device adapter structure
5794 **/
5795 static void ixgbe_watchdog_subtask(struct ixgbe_adapter *adapter)
5796 {
5797 /* if interface is down do nothing */
5798 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5799 test_bit(__IXGBE_RESETTING, &adapter->state))
5800 return;
5801
5802 ixgbe_watchdog_update_link(adapter);
5803
5804 if (adapter->link_up)
5805 ixgbe_watchdog_link_is_up(adapter);
5806 else
5807 ixgbe_watchdog_link_is_down(adapter);
5808
5809 ixgbe_spoof_check(adapter);
5810 ixgbe_update_stats(adapter);
5811
5812 ixgbe_watchdog_flush_tx(adapter);
5813 }
5814
5815 /**
5816 * ixgbe_sfp_detection_subtask - poll for SFP+ cable
5817 * @adapter: the ixgbe adapter structure
5818 **/
5819 static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter)
5820 {
5821 struct ixgbe_hw *hw = &adapter->hw;
5822 s32 err;
5823
5824 /* not searching for SFP so there is nothing to do here */
5825 if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) &&
5826 !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
5827 return;
5828
5829 /* concurent i2c reads are not supported */
5830 if (test_bit(__IXGBE_READ_I2C, &adapter->state))
5831 return;
5832
5833 /* someone else is in init, wait until next service event */
5834 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
5835 return;
5836
5837 err = hw->phy.ops.identify_sfp(hw);
5838 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
5839 goto sfp_out;
5840
5841 if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
5842 /* If no cable is present, then we need to reset
5843 * the next time we find a good cable. */
5844 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
5845 }
5846
5847 /* exit on error */
5848 if (err)
5849 goto sfp_out;
5850
5851 /* exit if reset not needed */
5852 if (!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
5853 goto sfp_out;
5854
5855 adapter->flags2 &= ~IXGBE_FLAG2_SFP_NEEDS_RESET;
5856
5857 /*
5858 * A module may be identified correctly, but the EEPROM may not have
5859 * support for that module. setup_sfp() will fail in that case, so
5860 * we should not allow that module to load.
5861 */
5862 if (hw->mac.type == ixgbe_mac_82598EB)
5863 err = hw->phy.ops.reset(hw);
5864 else
5865 err = hw->mac.ops.setup_sfp(hw);
5866
5867 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
5868 goto sfp_out;
5869
5870 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
5871 e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
5872
5873 sfp_out:
5874 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
5875
5876 if ((err == IXGBE_ERR_SFP_NOT_SUPPORTED) &&
5877 (adapter->netdev->reg_state == NETREG_REGISTERED)) {
5878 e_dev_err("failed to initialize because an unsupported "
5879 "SFP+ module type was detected.\n");
5880 e_dev_err("Reload the driver after installing a "
5881 "supported module.\n");
5882 unregister_netdev(adapter->netdev);
5883 }
5884 }
5885
5886 /**
5887 * ixgbe_sfp_link_config_subtask - set up link SFP after module install
5888 * @adapter: the ixgbe adapter structure
5889 **/
5890 static void ixgbe_sfp_link_config_subtask(struct ixgbe_adapter *adapter)
5891 {
5892 struct ixgbe_hw *hw = &adapter->hw;
5893 u32 speed;
5894 bool autoneg = false;
5895
5896 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_CONFIG))
5897 return;
5898
5899 /* someone else is in init, wait until next service event */
5900 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
5901 return;
5902
5903 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
5904
5905 speed = hw->phy.autoneg_advertised;
5906 if ((!speed) && (hw->mac.ops.get_link_capabilities))
5907 hw->mac.ops.get_link_capabilities(hw, &speed, &autoneg);
5908 if (hw->mac.ops.setup_link)
5909 hw->mac.ops.setup_link(hw, speed, true);
5910
5911 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
5912 adapter->link_check_timeout = jiffies;
5913 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
5914 }
5915
5916 #ifdef CONFIG_PCI_IOV
5917 static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter)
5918 {
5919 int vf;
5920 struct ixgbe_hw *hw = &adapter->hw;
5921 struct net_device *netdev = adapter->netdev;
5922 u32 gpc;
5923 u32 ciaa, ciad;
5924
5925 gpc = IXGBE_READ_REG(hw, IXGBE_TXDGPC);
5926 if (gpc) /* If incrementing then no need for the check below */
5927 return;
5928 /*
5929 * Check to see if a bad DMA write target from an errant or
5930 * malicious VF has caused a PCIe error. If so then we can
5931 * issue a VFLR to the offending VF(s) and then resume without
5932 * requesting a full slot reset.
5933 */
5934
5935 for (vf = 0; vf < adapter->num_vfs; vf++) {
5936 ciaa = (vf << 16) | 0x80000000;
5937 /* 32 bit read so align, we really want status at offset 6 */
5938 ciaa |= PCI_COMMAND;
5939 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
5940 ciad = IXGBE_READ_REG(hw, IXGBE_CIAD_82599);
5941 ciaa &= 0x7FFFFFFF;
5942 /* disable debug mode asap after reading data */
5943 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
5944 /* Get the upper 16 bits which will be the PCI status reg */
5945 ciad >>= 16;
5946 if (ciad & PCI_STATUS_REC_MASTER_ABORT) {
5947 netdev_err(netdev, "VF %d Hung DMA\n", vf);
5948 /* Issue VFLR */
5949 ciaa = (vf << 16) | 0x80000000;
5950 ciaa |= 0xA8;
5951 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
5952 ciad = 0x00008000; /* VFLR */
5953 IXGBE_WRITE_REG(hw, IXGBE_CIAD_82599, ciad);
5954 ciaa &= 0x7FFFFFFF;
5955 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
5956 }
5957 }
5958 }
5959
5960 #endif
5961 /**
5962 * ixgbe_service_timer - Timer Call-back
5963 * @data: pointer to adapter cast into an unsigned long
5964 **/
5965 static void ixgbe_service_timer(unsigned long data)
5966 {
5967 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
5968 unsigned long next_event_offset;
5969 bool ready = true;
5970
5971 /* poll faster when waiting for link */
5972 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
5973 next_event_offset = HZ / 10;
5974 else
5975 next_event_offset = HZ * 2;
5976
5977 #ifdef CONFIG_PCI_IOV
5978 /*
5979 * don't bother with SR-IOV VF DMA hang check if there are
5980 * no VFs or the link is down
5981 */
5982 if (!adapter->num_vfs ||
5983 (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
5984 goto normal_timer_service;
5985
5986 /* If we have VFs allocated then we must check for DMA hangs */
5987 ixgbe_check_for_bad_vf(adapter);
5988 next_event_offset = HZ / 50;
5989 adapter->timer_event_accumulator++;
5990
5991 if (adapter->timer_event_accumulator >= 100)
5992 adapter->timer_event_accumulator = 0;
5993 else
5994 ready = false;
5995
5996 normal_timer_service:
5997 #endif
5998 /* Reset the timer */
5999 mod_timer(&adapter->service_timer, next_event_offset + jiffies);
6000
6001 if (ready)
6002 ixgbe_service_event_schedule(adapter);
6003 }
6004
6005 static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter)
6006 {
6007 if (!(adapter->flags2 & IXGBE_FLAG2_RESET_REQUESTED))
6008 return;
6009
6010 adapter->flags2 &= ~IXGBE_FLAG2_RESET_REQUESTED;
6011
6012 /* If we're already down or resetting, just bail */
6013 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6014 test_bit(__IXGBE_RESETTING, &adapter->state))
6015 return;
6016
6017 ixgbe_dump(adapter);
6018 netdev_err(adapter->netdev, "Reset adapter\n");
6019 adapter->tx_timeout_count++;
6020
6021 ixgbe_reinit_locked(adapter);
6022 }
6023
6024 /**
6025 * ixgbe_service_task - manages and runs subtasks
6026 * @work: pointer to work_struct containing our data
6027 **/
6028 static void ixgbe_service_task(struct work_struct *work)
6029 {
6030 struct ixgbe_adapter *adapter = container_of(work,
6031 struct ixgbe_adapter,
6032 service_task);
6033 ixgbe_reset_subtask(adapter);
6034 ixgbe_sfp_detection_subtask(adapter);
6035 ixgbe_sfp_link_config_subtask(adapter);
6036 ixgbe_check_overtemp_subtask(adapter);
6037 ixgbe_watchdog_subtask(adapter);
6038 ixgbe_fdir_reinit_subtask(adapter);
6039 ixgbe_check_hang_subtask(adapter);
6040
6041 if (adapter->flags2 & IXGBE_FLAG2_PTP_ENABLED) {
6042 ixgbe_ptp_overflow_check(adapter);
6043 ixgbe_ptp_rx_hang(adapter);
6044 }
6045
6046 ixgbe_service_event_complete(adapter);
6047 }
6048
6049 static int ixgbe_tso(struct ixgbe_ring *tx_ring,
6050 struct ixgbe_tx_buffer *first,
6051 u8 *hdr_len)
6052 {
6053 struct sk_buff *skb = first->skb;
6054 u32 vlan_macip_lens, type_tucmd;
6055 u32 mss_l4len_idx, l4len;
6056
6057 if (skb->ip_summed != CHECKSUM_PARTIAL)
6058 return 0;
6059
6060 if (!skb_is_gso(skb))
6061 return 0;
6062
6063 if (skb_header_cloned(skb)) {
6064 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
6065 if (err)
6066 return err;
6067 }
6068
6069 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
6070 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
6071
6072 if (first->protocol == __constant_htons(ETH_P_IP)) {
6073 struct iphdr *iph = ip_hdr(skb);
6074 iph->tot_len = 0;
6075 iph->check = 0;
6076 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
6077 iph->daddr, 0,
6078 IPPROTO_TCP,
6079 0);
6080 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
6081 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
6082 IXGBE_TX_FLAGS_CSUM |
6083 IXGBE_TX_FLAGS_IPV4;
6084 } else if (skb_is_gso_v6(skb)) {
6085 ipv6_hdr(skb)->payload_len = 0;
6086 tcp_hdr(skb)->check =
6087 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
6088 &ipv6_hdr(skb)->daddr,
6089 0, IPPROTO_TCP, 0);
6090 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
6091 IXGBE_TX_FLAGS_CSUM;
6092 }
6093
6094 /* compute header lengths */
6095 l4len = tcp_hdrlen(skb);
6096 *hdr_len = skb_transport_offset(skb) + l4len;
6097
6098 /* update gso size and bytecount with header size */
6099 first->gso_segs = skb_shinfo(skb)->gso_segs;
6100 first->bytecount += (first->gso_segs - 1) * *hdr_len;
6101
6102 /* mss_l4len_id: use 0 as index for TSO */
6103 mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
6104 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
6105
6106 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
6107 vlan_macip_lens = skb_network_header_len(skb);
6108 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
6109 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
6110
6111 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, type_tucmd,
6112 mss_l4len_idx);
6113
6114 return 1;
6115 }
6116
6117 static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
6118 struct ixgbe_tx_buffer *first)
6119 {
6120 struct sk_buff *skb = first->skb;
6121 u32 vlan_macip_lens = 0;
6122 u32 mss_l4len_idx = 0;
6123 u32 type_tucmd = 0;
6124
6125 if (skb->ip_summed != CHECKSUM_PARTIAL) {
6126 if (!(first->tx_flags & IXGBE_TX_FLAGS_HW_VLAN) &&
6127 !(first->tx_flags & IXGBE_TX_FLAGS_CC))
6128 return;
6129 } else {
6130 u8 l4_hdr = 0;
6131 switch (first->protocol) {
6132 case __constant_htons(ETH_P_IP):
6133 vlan_macip_lens |= skb_network_header_len(skb);
6134 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
6135 l4_hdr = ip_hdr(skb)->protocol;
6136 break;
6137 case __constant_htons(ETH_P_IPV6):
6138 vlan_macip_lens |= skb_network_header_len(skb);
6139 l4_hdr = ipv6_hdr(skb)->nexthdr;
6140 break;
6141 default:
6142 if (unlikely(net_ratelimit())) {
6143 dev_warn(tx_ring->dev,
6144 "partial checksum but proto=%x!\n",
6145 first->protocol);
6146 }
6147 break;
6148 }
6149
6150 switch (l4_hdr) {
6151 case IPPROTO_TCP:
6152 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
6153 mss_l4len_idx = tcp_hdrlen(skb) <<
6154 IXGBE_ADVTXD_L4LEN_SHIFT;
6155 break;
6156 case IPPROTO_SCTP:
6157 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
6158 mss_l4len_idx = sizeof(struct sctphdr) <<
6159 IXGBE_ADVTXD_L4LEN_SHIFT;
6160 break;
6161 case IPPROTO_UDP:
6162 mss_l4len_idx = sizeof(struct udphdr) <<
6163 IXGBE_ADVTXD_L4LEN_SHIFT;
6164 break;
6165 default:
6166 if (unlikely(net_ratelimit())) {
6167 dev_warn(tx_ring->dev,
6168 "partial checksum but l4 proto=%x!\n",
6169 l4_hdr);
6170 }
6171 break;
6172 }
6173
6174 /* update TX checksum flag */
6175 first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
6176 }
6177
6178 /* vlan_macip_lens: MACLEN, VLAN tag */
6179 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
6180 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
6181
6182 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0,
6183 type_tucmd, mss_l4len_idx);
6184 }
6185
6186 #define IXGBE_SET_FLAG(_input, _flag, _result) \
6187 ((_flag <= _result) ? \
6188 ((u32)(_input & _flag) * (_result / _flag)) : \
6189 ((u32)(_input & _flag) / (_flag / _result)))
6190
6191 static u32 ixgbe_tx_cmd_type(struct sk_buff *skb, u32 tx_flags)
6192 {
6193 /* set type for advanced descriptor with frame checksum insertion */
6194 u32 cmd_type = IXGBE_ADVTXD_DTYP_DATA |
6195 IXGBE_ADVTXD_DCMD_DEXT |
6196 IXGBE_ADVTXD_DCMD_IFCS;
6197
6198 /* set HW vlan bit if vlan is present */
6199 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_HW_VLAN,
6200 IXGBE_ADVTXD_DCMD_VLE);
6201
6202 /* set segmentation enable bits for TSO/FSO */
6203 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSO,
6204 IXGBE_ADVTXD_DCMD_TSE);
6205
6206 /* set timestamp bit if present */
6207 cmd_type |= IXGBE_SET_FLAG(tx_flags, IXGBE_TX_FLAGS_TSTAMP,
6208 IXGBE_ADVTXD_MAC_TSTAMP);
6209
6210 /* insert frame checksum */
6211 cmd_type ^= IXGBE_SET_FLAG(skb->no_fcs, 1, IXGBE_ADVTXD_DCMD_IFCS);
6212
6213 return cmd_type;
6214 }
6215
6216 static void ixgbe_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
6217 u32 tx_flags, unsigned int paylen)
6218 {
6219 u32 olinfo_status = paylen << IXGBE_ADVTXD_PAYLEN_SHIFT;
6220
6221 /* enable L4 checksum for TSO and TX checksum offload */
6222 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
6223 IXGBE_TX_FLAGS_CSUM,
6224 IXGBE_ADVTXD_POPTS_TXSM);
6225
6226 /* enble IPv4 checksum for TSO */
6227 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
6228 IXGBE_TX_FLAGS_IPV4,
6229 IXGBE_ADVTXD_POPTS_IXSM);
6230
6231 /*
6232 * Check Context must be set if Tx switch is enabled, which it
6233 * always is for case where virtual functions are running
6234 */
6235 olinfo_status |= IXGBE_SET_FLAG(tx_flags,
6236 IXGBE_TX_FLAGS_CC,
6237 IXGBE_ADVTXD_CC);
6238
6239 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
6240 }
6241
6242 #define IXGBE_TXD_CMD (IXGBE_TXD_CMD_EOP | \
6243 IXGBE_TXD_CMD_RS)
6244
6245 static void ixgbe_tx_map(struct ixgbe_ring *tx_ring,
6246 struct ixgbe_tx_buffer *first,
6247 const u8 hdr_len)
6248 {
6249 struct sk_buff *skb = first->skb;
6250 struct ixgbe_tx_buffer *tx_buffer;
6251 union ixgbe_adv_tx_desc *tx_desc;
6252 struct skb_frag_struct *frag;
6253 dma_addr_t dma;
6254 unsigned int data_len, size;
6255 u32 tx_flags = first->tx_flags;
6256 u32 cmd_type = ixgbe_tx_cmd_type(skb, tx_flags);
6257 u16 i = tx_ring->next_to_use;
6258
6259 tx_desc = IXGBE_TX_DESC(tx_ring, i);
6260
6261 ixgbe_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);
6262
6263 size = skb_headlen(skb);
6264 data_len = skb->data_len;
6265
6266 #ifdef IXGBE_FCOE
6267 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6268 if (data_len < sizeof(struct fcoe_crc_eof)) {
6269 size -= sizeof(struct fcoe_crc_eof) - data_len;
6270 data_len = 0;
6271 } else {
6272 data_len -= sizeof(struct fcoe_crc_eof);
6273 }
6274 }
6275
6276 #endif
6277 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
6278
6279 tx_buffer = first;
6280
6281 for (frag = &skb_shinfo(skb)->frags[0];; frag++) {
6282 if (dma_mapping_error(tx_ring->dev, dma))
6283 goto dma_error;
6284
6285 /* record length, and DMA address */
6286 dma_unmap_len_set(tx_buffer, len, size);
6287 dma_unmap_addr_set(tx_buffer, dma, dma);
6288
6289 tx_desc->read.buffer_addr = cpu_to_le64(dma);
6290
6291 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
6292 tx_desc->read.cmd_type_len =
6293 cpu_to_le32(cmd_type ^ IXGBE_MAX_DATA_PER_TXD);
6294
6295 i++;
6296 tx_desc++;
6297 if (i == tx_ring->count) {
6298 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
6299 i = 0;
6300 }
6301 tx_desc->read.olinfo_status = 0;
6302
6303 dma += IXGBE_MAX_DATA_PER_TXD;
6304 size -= IXGBE_MAX_DATA_PER_TXD;
6305
6306 tx_desc->read.buffer_addr = cpu_to_le64(dma);
6307 }
6308
6309 if (likely(!data_len))
6310 break;
6311
6312 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type ^ size);
6313
6314 i++;
6315 tx_desc++;
6316 if (i == tx_ring->count) {
6317 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
6318 i = 0;
6319 }
6320 tx_desc->read.olinfo_status = 0;
6321
6322 #ifdef IXGBE_FCOE
6323 size = min_t(unsigned int, data_len, skb_frag_size(frag));
6324 #else
6325 size = skb_frag_size(frag);
6326 #endif
6327 data_len -= size;
6328
6329 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
6330 DMA_TO_DEVICE);
6331
6332 tx_buffer = &tx_ring->tx_buffer_info[i];
6333 }
6334
6335 /* write last descriptor with RS and EOP bits */
6336 cmd_type |= size | IXGBE_TXD_CMD;
6337 tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
6338
6339 netdev_tx_sent_queue(txring_txq(tx_ring), first->bytecount);
6340
6341 /* set the timestamp */
6342 first->time_stamp = jiffies;
6343
6344 /*
6345 * Force memory writes to complete before letting h/w know there
6346 * are new descriptors to fetch. (Only applicable for weak-ordered
6347 * memory model archs, such as IA-64).
6348 *
6349 * We also need this memory barrier to make certain all of the
6350 * status bits have been updated before next_to_watch is written.
6351 */
6352 wmb();
6353
6354 /* set next_to_watch value indicating a packet is present */
6355 first->next_to_watch = tx_desc;
6356
6357 i++;
6358 if (i == tx_ring->count)
6359 i = 0;
6360
6361 tx_ring->next_to_use = i;
6362
6363 /* notify HW of packet */
6364 writel(i, tx_ring->tail);
6365
6366 return;
6367 dma_error:
6368 dev_err(tx_ring->dev, "TX DMA map failed\n");
6369
6370 /* clear dma mappings for failed tx_buffer_info map */
6371 for (;;) {
6372 tx_buffer = &tx_ring->tx_buffer_info[i];
6373 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer);
6374 if (tx_buffer == first)
6375 break;
6376 if (i == 0)
6377 i = tx_ring->count;
6378 i--;
6379 }
6380
6381 tx_ring->next_to_use = i;
6382 }
6383
6384 static void ixgbe_atr(struct ixgbe_ring *ring,
6385 struct ixgbe_tx_buffer *first)
6386 {
6387 struct ixgbe_q_vector *q_vector = ring->q_vector;
6388 union ixgbe_atr_hash_dword input = { .dword = 0 };
6389 union ixgbe_atr_hash_dword common = { .dword = 0 };
6390 union {
6391 unsigned char *network;
6392 struct iphdr *ipv4;
6393 struct ipv6hdr *ipv6;
6394 } hdr;
6395 struct tcphdr *th;
6396 __be16 vlan_id;
6397
6398 /* if ring doesn't have a interrupt vector, cannot perform ATR */
6399 if (!q_vector)
6400 return;
6401
6402 /* do nothing if sampling is disabled */
6403 if (!ring->atr_sample_rate)
6404 return;
6405
6406 ring->atr_count++;
6407
6408 /* snag network header to get L4 type and address */
6409 hdr.network = skb_network_header(first->skb);
6410
6411 /* Currently only IPv4/IPv6 with TCP is supported */
6412 if ((first->protocol != __constant_htons(ETH_P_IPV6) ||
6413 hdr.ipv6->nexthdr != IPPROTO_TCP) &&
6414 (first->protocol != __constant_htons(ETH_P_IP) ||
6415 hdr.ipv4->protocol != IPPROTO_TCP))
6416 return;
6417
6418 th = tcp_hdr(first->skb);
6419
6420 /* skip this packet since it is invalid or the socket is closing */
6421 if (!th || th->fin)
6422 return;
6423
6424 /* sample on all syn packets or once every atr sample count */
6425 if (!th->syn && (ring->atr_count < ring->atr_sample_rate))
6426 return;
6427
6428 /* reset sample count */
6429 ring->atr_count = 0;
6430
6431 vlan_id = htons(first->tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT);
6432
6433 /*
6434 * src and dst are inverted, think how the receiver sees them
6435 *
6436 * The input is broken into two sections, a non-compressed section
6437 * containing vm_pool, vlan_id, and flow_type. The rest of the data
6438 * is XORed together and stored in the compressed dword.
6439 */
6440 input.formatted.vlan_id = vlan_id;
6441
6442 /*
6443 * since src port and flex bytes occupy the same word XOR them together
6444 * and write the value to source port portion of compressed dword
6445 */
6446 if (first->tx_flags & (IXGBE_TX_FLAGS_SW_VLAN | IXGBE_TX_FLAGS_HW_VLAN))
6447 common.port.src ^= th->dest ^ __constant_htons(ETH_P_8021Q);
6448 else
6449 common.port.src ^= th->dest ^ first->protocol;
6450 common.port.dst ^= th->source;
6451
6452 if (first->protocol == __constant_htons(ETH_P_IP)) {
6453 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4;
6454 common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr;
6455 } else {
6456 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6;
6457 common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^
6458 hdr.ipv6->saddr.s6_addr32[1] ^
6459 hdr.ipv6->saddr.s6_addr32[2] ^
6460 hdr.ipv6->saddr.s6_addr32[3] ^
6461 hdr.ipv6->daddr.s6_addr32[0] ^
6462 hdr.ipv6->daddr.s6_addr32[1] ^
6463 hdr.ipv6->daddr.s6_addr32[2] ^
6464 hdr.ipv6->daddr.s6_addr32[3];
6465 }
6466
6467 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
6468 ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw,
6469 input, common, ring->queue_index);
6470 }
6471
6472 static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
6473 {
6474 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
6475 /* Herbert's original patch had:
6476 * smp_mb__after_netif_stop_queue();
6477 * but since that doesn't exist yet, just open code it. */
6478 smp_mb();
6479
6480 /* We need to check again in a case another CPU has just
6481 * made room available. */
6482 if (likely(ixgbe_desc_unused(tx_ring) < size))
6483 return -EBUSY;
6484
6485 /* A reprieve! - use start_queue because it doesn't call schedule */
6486 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
6487 ++tx_ring->tx_stats.restart_queue;
6488 return 0;
6489 }
6490
6491 static inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
6492 {
6493 if (likely(ixgbe_desc_unused(tx_ring) >= size))
6494 return 0;
6495 return __ixgbe_maybe_stop_tx(tx_ring, size);
6496 }
6497
6498 #ifdef IXGBE_FCOE
6499 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
6500 {
6501 struct ixgbe_adapter *adapter;
6502 struct ixgbe_ring_feature *f;
6503 int txq;
6504
6505 /*
6506 * only execute the code below if protocol is FCoE
6507 * or FIP and we have FCoE enabled on the adapter
6508 */
6509 switch (vlan_get_protocol(skb)) {
6510 case __constant_htons(ETH_P_FCOE):
6511 case __constant_htons(ETH_P_FIP):
6512 adapter = netdev_priv(dev);
6513
6514 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
6515 break;
6516 default:
6517 return __netdev_pick_tx(dev, skb);
6518 }
6519
6520 f = &adapter->ring_feature[RING_F_FCOE];
6521
6522 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) :
6523 smp_processor_id();
6524
6525 while (txq >= f->indices)
6526 txq -= f->indices;
6527
6528 return txq + f->offset;
6529 }
6530
6531 #endif
6532 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
6533 struct ixgbe_adapter *adapter,
6534 struct ixgbe_ring *tx_ring)
6535 {
6536 struct ixgbe_tx_buffer *first;
6537 int tso;
6538 u32 tx_flags = 0;
6539 unsigned short f;
6540 u16 count = TXD_USE_COUNT(skb_headlen(skb));
6541 __be16 protocol = skb->protocol;
6542 u8 hdr_len = 0;
6543
6544 /*
6545 * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
6546 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
6547 * + 2 desc gap to keep tail from touching head,
6548 * + 1 desc for context descriptor,
6549 * otherwise try next time
6550 */
6551 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
6552 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
6553
6554 if (ixgbe_maybe_stop_tx(tx_ring, count + 3)) {
6555 tx_ring->tx_stats.tx_busy++;
6556 return NETDEV_TX_BUSY;
6557 }
6558
6559 /* record the location of the first descriptor for this packet */
6560 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
6561 first->skb = skb;
6562 first->bytecount = skb->len;
6563 first->gso_segs = 1;
6564
6565 /* if we have a HW VLAN tag being added default to the HW one */
6566 if (vlan_tx_tag_present(skb)) {
6567 tx_flags |= vlan_tx_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT;
6568 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
6569 /* else if it is a SW VLAN check the next protocol and store the tag */
6570 } else if (protocol == __constant_htons(ETH_P_8021Q)) {
6571 struct vlan_hdr *vhdr, _vhdr;
6572 vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(_vhdr), &_vhdr);
6573 if (!vhdr)
6574 goto out_drop;
6575
6576 protocol = vhdr->h_vlan_encapsulated_proto;
6577 tx_flags |= ntohs(vhdr->h_vlan_TCI) <<
6578 IXGBE_TX_FLAGS_VLAN_SHIFT;
6579 tx_flags |= IXGBE_TX_FLAGS_SW_VLAN;
6580 }
6581
6582 skb_tx_timestamp(skb);
6583
6584 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
6585 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
6586 tx_flags |= IXGBE_TX_FLAGS_TSTAMP;
6587
6588 /* schedule check for Tx timestamp */
6589 adapter->ptp_tx_skb = skb_get(skb);
6590 adapter->ptp_tx_start = jiffies;
6591 schedule_work(&adapter->ptp_tx_work);
6592 }
6593
6594 #ifdef CONFIG_PCI_IOV
6595 /*
6596 * Use the l2switch_enable flag - would be false if the DMA
6597 * Tx switch had been disabled.
6598 */
6599 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6600 tx_flags |= IXGBE_TX_FLAGS_CC;
6601
6602 #endif
6603 /* DCB maps skb priorities 0-7 onto 3 bit PCP of VLAN tag. */
6604 if ((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
6605 ((tx_flags & (IXGBE_TX_FLAGS_HW_VLAN | IXGBE_TX_FLAGS_SW_VLAN)) ||
6606 (skb->priority != TC_PRIO_CONTROL))) {
6607 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
6608 tx_flags |= (skb->priority & 0x7) <<
6609 IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT;
6610 if (tx_flags & IXGBE_TX_FLAGS_SW_VLAN) {
6611 struct vlan_ethhdr *vhdr;
6612 if (skb_header_cloned(skb) &&
6613 pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
6614 goto out_drop;
6615 vhdr = (struct vlan_ethhdr *)skb->data;
6616 vhdr->h_vlan_TCI = htons(tx_flags >>
6617 IXGBE_TX_FLAGS_VLAN_SHIFT);
6618 } else {
6619 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
6620 }
6621 }
6622
6623 /* record initial flags and protocol */
6624 first->tx_flags = tx_flags;
6625 first->protocol = protocol;
6626
6627 #ifdef IXGBE_FCOE
6628 /* setup tx offload for FCoE */
6629 if ((protocol == __constant_htons(ETH_P_FCOE)) &&
6630 (tx_ring->netdev->features & (NETIF_F_FSO | NETIF_F_FCOE_CRC))) {
6631 tso = ixgbe_fso(tx_ring, first, &hdr_len);
6632 if (tso < 0)
6633 goto out_drop;
6634
6635 goto xmit_fcoe;
6636 }
6637
6638 #endif /* IXGBE_FCOE */
6639 tso = ixgbe_tso(tx_ring, first, &hdr_len);
6640 if (tso < 0)
6641 goto out_drop;
6642 else if (!tso)
6643 ixgbe_tx_csum(tx_ring, first);
6644
6645 /* add the ATR filter if ATR is on */
6646 if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state))
6647 ixgbe_atr(tx_ring, first);
6648
6649 #ifdef IXGBE_FCOE
6650 xmit_fcoe:
6651 #endif /* IXGBE_FCOE */
6652 ixgbe_tx_map(tx_ring, first, hdr_len);
6653
6654 ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);
6655
6656 return NETDEV_TX_OK;
6657
6658 out_drop:
6659 dev_kfree_skb_any(first->skb);
6660 first->skb = NULL;
6661
6662 return NETDEV_TX_OK;
6663 }
6664
6665 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
6666 struct net_device *netdev)
6667 {
6668 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6669 struct ixgbe_ring *tx_ring;
6670
6671 /*
6672 * The minimum packet size for olinfo paylen is 17 so pad the skb
6673 * in order to meet this minimum size requirement.
6674 */
6675 if (unlikely(skb->len < 17)) {
6676 if (skb_pad(skb, 17 - skb->len))
6677 return NETDEV_TX_OK;
6678 skb->len = 17;
6679 skb_set_tail_pointer(skb, 17);
6680 }
6681
6682 tx_ring = adapter->tx_ring[skb->queue_mapping];
6683 return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
6684 }
6685
6686 /**
6687 * ixgbe_set_mac - Change the Ethernet Address of the NIC
6688 * @netdev: network interface device structure
6689 * @p: pointer to an address structure
6690 *
6691 * Returns 0 on success, negative on failure
6692 **/
6693 static int ixgbe_set_mac(struct net_device *netdev, void *p)
6694 {
6695 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6696 struct ixgbe_hw *hw = &adapter->hw;
6697 struct sockaddr *addr = p;
6698
6699 if (!is_valid_ether_addr(addr->sa_data))
6700 return -EADDRNOTAVAIL;
6701
6702 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
6703 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
6704
6705 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, VMDQ_P(0), IXGBE_RAH_AV);
6706
6707 return 0;
6708 }
6709
6710 static int
6711 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
6712 {
6713 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6714 struct ixgbe_hw *hw = &adapter->hw;
6715 u16 value;
6716 int rc;
6717
6718 if (prtad != hw->phy.mdio.prtad)
6719 return -EINVAL;
6720 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
6721 if (!rc)
6722 rc = value;
6723 return rc;
6724 }
6725
6726 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
6727 u16 addr, u16 value)
6728 {
6729 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6730 struct ixgbe_hw *hw = &adapter->hw;
6731
6732 if (prtad != hw->phy.mdio.prtad)
6733 return -EINVAL;
6734 return hw->phy.ops.write_reg(hw, addr, devad, value);
6735 }
6736
6737 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
6738 {
6739 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6740
6741 switch (cmd) {
6742 case SIOCSHWTSTAMP:
6743 return ixgbe_ptp_hwtstamp_ioctl(adapter, req, cmd);
6744 default:
6745 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
6746 }
6747 }
6748
6749 /**
6750 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
6751 * netdev->dev_addrs
6752 * @netdev: network interface device structure
6753 *
6754 * Returns non-zero on failure
6755 **/
6756 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
6757 {
6758 int err = 0;
6759 struct ixgbe_adapter *adapter = netdev_priv(dev);
6760 struct ixgbe_hw *hw = &adapter->hw;
6761
6762 if (is_valid_ether_addr(hw->mac.san_addr)) {
6763 rtnl_lock();
6764 err = dev_addr_add(dev, hw->mac.san_addr, NETDEV_HW_ADDR_T_SAN);
6765 rtnl_unlock();
6766
6767 /* update SAN MAC vmdq pool selection */
6768 hw->mac.ops.set_vmdq_san_mac(hw, VMDQ_P(0));
6769 }
6770 return err;
6771 }
6772
6773 /**
6774 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
6775 * netdev->dev_addrs
6776 * @netdev: network interface device structure
6777 *
6778 * Returns non-zero on failure
6779 **/
6780 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
6781 {
6782 int err = 0;
6783 struct ixgbe_adapter *adapter = netdev_priv(dev);
6784 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6785
6786 if (is_valid_ether_addr(mac->san_addr)) {
6787 rtnl_lock();
6788 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6789 rtnl_unlock();
6790 }
6791 return err;
6792 }
6793
6794 #ifdef CONFIG_NET_POLL_CONTROLLER
6795 /*
6796 * Polling 'interrupt' - used by things like netconsole to send skbs
6797 * without having to re-enable interrupts. It's not called while
6798 * the interrupt routine is executing.
6799 */
6800 static void ixgbe_netpoll(struct net_device *netdev)
6801 {
6802 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6803 int i;
6804
6805 /* if interface is down do nothing */
6806 if (test_bit(__IXGBE_DOWN, &adapter->state))
6807 return;
6808
6809 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
6810 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
6811 for (i = 0; i < adapter->num_q_vectors; i++)
6812 ixgbe_msix_clean_rings(0, adapter->q_vector[i]);
6813 } else {
6814 ixgbe_intr(adapter->pdev->irq, netdev);
6815 }
6816 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
6817 }
6818
6819 #endif
6820 static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
6821 struct rtnl_link_stats64 *stats)
6822 {
6823 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6824 int i;
6825
6826 rcu_read_lock();
6827 for (i = 0; i < adapter->num_rx_queues; i++) {
6828 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]);
6829 u64 bytes, packets;
6830 unsigned int start;
6831
6832 if (ring) {
6833 do {
6834 start = u64_stats_fetch_begin_bh(&ring->syncp);
6835 packets = ring->stats.packets;
6836 bytes = ring->stats.bytes;
6837 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
6838 stats->rx_packets += packets;
6839 stats->rx_bytes += bytes;
6840 }
6841 }
6842
6843 for (i = 0; i < adapter->num_tx_queues; i++) {
6844 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->tx_ring[i]);
6845 u64 bytes, packets;
6846 unsigned int start;
6847
6848 if (ring) {
6849 do {
6850 start = u64_stats_fetch_begin_bh(&ring->syncp);
6851 packets = ring->stats.packets;
6852 bytes = ring->stats.bytes;
6853 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
6854 stats->tx_packets += packets;
6855 stats->tx_bytes += bytes;
6856 }
6857 }
6858 rcu_read_unlock();
6859 /* following stats updated by ixgbe_watchdog_task() */
6860 stats->multicast = netdev->stats.multicast;
6861 stats->rx_errors = netdev->stats.rx_errors;
6862 stats->rx_length_errors = netdev->stats.rx_length_errors;
6863 stats->rx_crc_errors = netdev->stats.rx_crc_errors;
6864 stats->rx_missed_errors = netdev->stats.rx_missed_errors;
6865 return stats;
6866 }
6867
6868 #ifdef CONFIG_IXGBE_DCB
6869 /**
6870 * ixgbe_validate_rtr - verify 802.1Qp to Rx packet buffer mapping is valid.
6871 * @adapter: pointer to ixgbe_adapter
6872 * @tc: number of traffic classes currently enabled
6873 *
6874 * Configure a valid 802.1Qp to Rx packet buffer mapping ie confirm
6875 * 802.1Q priority maps to a packet buffer that exists.
6876 */
6877 static void ixgbe_validate_rtr(struct ixgbe_adapter *adapter, u8 tc)
6878 {
6879 struct ixgbe_hw *hw = &adapter->hw;
6880 u32 reg, rsave;
6881 int i;
6882
6883 /* 82598 have a static priority to TC mapping that can not
6884 * be changed so no validation is needed.
6885 */
6886 if (hw->mac.type == ixgbe_mac_82598EB)
6887 return;
6888
6889 reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC);
6890 rsave = reg;
6891
6892 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
6893 u8 up2tc = reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT);
6894
6895 /* If up2tc is out of bounds default to zero */
6896 if (up2tc > tc)
6897 reg &= ~(0x7 << IXGBE_RTRUP2TC_UP_SHIFT);
6898 }
6899
6900 if (reg != rsave)
6901 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
6902
6903 return;
6904 }
6905
6906 /**
6907 * ixgbe_set_prio_tc_map - Configure netdev prio tc map
6908 * @adapter: Pointer to adapter struct
6909 *
6910 * Populate the netdev user priority to tc map
6911 */
6912 static void ixgbe_set_prio_tc_map(struct ixgbe_adapter *adapter)
6913 {
6914 struct net_device *dev = adapter->netdev;
6915 struct ixgbe_dcb_config *dcb_cfg = &adapter->dcb_cfg;
6916 struct ieee_ets *ets = adapter->ixgbe_ieee_ets;
6917 u8 prio;
6918
6919 for (prio = 0; prio < MAX_USER_PRIORITY; prio++) {
6920 u8 tc = 0;
6921
6922 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE)
6923 tc = ixgbe_dcb_get_tc_from_up(dcb_cfg, 0, prio);
6924 else if (ets)
6925 tc = ets->prio_tc[prio];
6926
6927 netdev_set_prio_tc_map(dev, prio, tc);
6928 }
6929 }
6930
6931 #endif /* CONFIG_IXGBE_DCB */
6932 /**
6933 * ixgbe_setup_tc - configure net_device for multiple traffic classes
6934 *
6935 * @netdev: net device to configure
6936 * @tc: number of traffic classes to enable
6937 */
6938 int ixgbe_setup_tc(struct net_device *dev, u8 tc)
6939 {
6940 struct ixgbe_adapter *adapter = netdev_priv(dev);
6941 struct ixgbe_hw *hw = &adapter->hw;
6942
6943 /* Hardware supports up to 8 traffic classes */
6944 if (tc > adapter->dcb_cfg.num_tcs.pg_tcs ||
6945 (hw->mac.type == ixgbe_mac_82598EB &&
6946 tc < MAX_TRAFFIC_CLASS))
6947 return -EINVAL;
6948
6949 /* Hardware has to reinitialize queues and interrupts to
6950 * match packet buffer alignment. Unfortunately, the
6951 * hardware is not flexible enough to do this dynamically.
6952 */
6953 if (netif_running(dev))
6954 ixgbe_close(dev);
6955 ixgbe_clear_interrupt_scheme(adapter);
6956
6957 #ifdef CONFIG_IXGBE_DCB
6958 if (tc) {
6959 netdev_set_num_tc(dev, tc);
6960 ixgbe_set_prio_tc_map(adapter);
6961
6962 adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
6963
6964 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
6965 adapter->last_lfc_mode = adapter->hw.fc.requested_mode;
6966 adapter->hw.fc.requested_mode = ixgbe_fc_none;
6967 }
6968 } else {
6969 netdev_reset_tc(dev);
6970
6971 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
6972 adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
6973
6974 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
6975
6976 adapter->temp_dcb_cfg.pfc_mode_enable = false;
6977 adapter->dcb_cfg.pfc_mode_enable = false;
6978 }
6979
6980 ixgbe_validate_rtr(adapter, tc);
6981
6982 #endif /* CONFIG_IXGBE_DCB */
6983 ixgbe_init_interrupt_scheme(adapter);
6984
6985 if (netif_running(dev))
6986 return ixgbe_open(dev);
6987
6988 return 0;
6989 }
6990
6991 #ifdef CONFIG_PCI_IOV
6992 void ixgbe_sriov_reinit(struct ixgbe_adapter *adapter)
6993 {
6994 struct net_device *netdev = adapter->netdev;
6995
6996 rtnl_lock();
6997 ixgbe_setup_tc(netdev, netdev_get_num_tc(netdev));
6998 rtnl_unlock();
6999 }
7000
7001 #endif
7002 void ixgbe_do_reset(struct net_device *netdev)
7003 {
7004 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7005
7006 if (netif_running(netdev))
7007 ixgbe_reinit_locked(adapter);
7008 else
7009 ixgbe_reset(adapter);
7010 }
7011
7012 static netdev_features_t ixgbe_fix_features(struct net_device *netdev,
7013 netdev_features_t features)
7014 {
7015 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7016
7017 /* If Rx checksum is disabled, then RSC/LRO should also be disabled */
7018 if (!(features & NETIF_F_RXCSUM))
7019 features &= ~NETIF_F_LRO;
7020
7021 /* Turn off LRO if not RSC capable */
7022 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE))
7023 features &= ~NETIF_F_LRO;
7024
7025 return features;
7026 }
7027
7028 static int ixgbe_set_features(struct net_device *netdev,
7029 netdev_features_t features)
7030 {
7031 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7032 netdev_features_t changed = netdev->features ^ features;
7033 bool need_reset = false;
7034
7035 /* Make sure RSC matches LRO, reset if change */
7036 if (!(features & NETIF_F_LRO)) {
7037 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
7038 need_reset = true;
7039 adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED;
7040 } else if ((adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) &&
7041 !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)) {
7042 if (adapter->rx_itr_setting == 1 ||
7043 adapter->rx_itr_setting > IXGBE_MIN_RSC_ITR) {
7044 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
7045 need_reset = true;
7046 } else if ((changed ^ features) & NETIF_F_LRO) {
7047 e_info(probe, "rx-usecs set too low, "
7048 "disabling RSC\n");
7049 }
7050 }
7051
7052 /*
7053 * Check if Flow Director n-tuple support was enabled or disabled. If
7054 * the state changed, we need to reset.
7055 */
7056 switch (features & NETIF_F_NTUPLE) {
7057 case NETIF_F_NTUPLE:
7058 /* turn off ATR, enable perfect filters and reset */
7059 if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
7060 need_reset = true;
7061
7062 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
7063 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
7064 break;
7065 default:
7066 /* turn off perfect filters, enable ATR and reset */
7067 if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
7068 need_reset = true;
7069
7070 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
7071
7072 /* We cannot enable ATR if SR-IOV is enabled */
7073 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7074 break;
7075
7076 /* We cannot enable ATR if we have 2 or more traffic classes */
7077 if (netdev_get_num_tc(netdev) > 1)
7078 break;
7079
7080 /* We cannot enable ATR if RSS is disabled */
7081 if (adapter->ring_feature[RING_F_RSS].limit <= 1)
7082 break;
7083
7084 /* A sample rate of 0 indicates ATR disabled */
7085 if (!adapter->atr_sample_rate)
7086 break;
7087
7088 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
7089 break;
7090 }
7091
7092 if (features & NETIF_F_HW_VLAN_CTAG_RX)
7093 ixgbe_vlan_strip_enable(adapter);
7094 else
7095 ixgbe_vlan_strip_disable(adapter);
7096
7097 if (changed & NETIF_F_RXALL)
7098 need_reset = true;
7099
7100 netdev->features = features;
7101 if (need_reset)
7102 ixgbe_do_reset(netdev);
7103
7104 return 0;
7105 }
7106
7107 static int ixgbe_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
7108 struct net_device *dev,
7109 const unsigned char *addr,
7110 u16 flags)
7111 {
7112 struct ixgbe_adapter *adapter = netdev_priv(dev);
7113 int err;
7114
7115 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
7116 return ndo_dflt_fdb_add(ndm, tb, dev, addr, flags);
7117
7118 /* Hardware does not support aging addresses so if a
7119 * ndm_state is given only allow permanent addresses
7120 */
7121 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
7122 pr_info("%s: FDB only supports static addresses\n",
7123 ixgbe_driver_name);
7124 return -EINVAL;
7125 }
7126
7127 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) {
7128 u32 rar_uc_entries = IXGBE_MAX_PF_MACVLANS;
7129
7130 if (netdev_uc_count(dev) < rar_uc_entries)
7131 err = dev_uc_add_excl(dev, addr);
7132 else
7133 err = -ENOMEM;
7134 } else if (is_multicast_ether_addr(addr)) {
7135 err = dev_mc_add_excl(dev, addr);
7136 } else {
7137 err = -EINVAL;
7138 }
7139
7140 /* Only return duplicate errors if NLM_F_EXCL is set */
7141 if (err == -EEXIST && !(flags & NLM_F_EXCL))
7142 err = 0;
7143
7144 return err;
7145 }
7146
7147 static int ixgbe_ndo_bridge_setlink(struct net_device *dev,
7148 struct nlmsghdr *nlh)
7149 {
7150 struct ixgbe_adapter *adapter = netdev_priv(dev);
7151 struct nlattr *attr, *br_spec;
7152 int rem;
7153
7154 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
7155 return -EOPNOTSUPP;
7156
7157 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
7158
7159 nla_for_each_nested(attr, br_spec, rem) {
7160 __u16 mode;
7161 u32 reg = 0;
7162
7163 if (nla_type(attr) != IFLA_BRIDGE_MODE)
7164 continue;
7165
7166 mode = nla_get_u16(attr);
7167 if (mode == BRIDGE_MODE_VEPA) {
7168 reg = 0;
7169 adapter->flags2 &= ~IXGBE_FLAG2_BRIDGE_MODE_VEB;
7170 } else if (mode == BRIDGE_MODE_VEB) {
7171 reg = IXGBE_PFDTXGSWC_VT_LBEN;
7172 adapter->flags2 |= IXGBE_FLAG2_BRIDGE_MODE_VEB;
7173 } else
7174 return -EINVAL;
7175
7176 IXGBE_WRITE_REG(&adapter->hw, IXGBE_PFDTXGSWC, reg);
7177
7178 e_info(drv, "enabling bridge mode: %s\n",
7179 mode == BRIDGE_MODE_VEPA ? "VEPA" : "VEB");
7180 }
7181
7182 return 0;
7183 }
7184
7185 static int ixgbe_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
7186 struct net_device *dev,
7187 u32 filter_mask)
7188 {
7189 struct ixgbe_adapter *adapter = netdev_priv(dev);
7190 u16 mode;
7191
7192 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
7193 return 0;
7194
7195 if (adapter->flags2 & IXGBE_FLAG2_BRIDGE_MODE_VEB)
7196 mode = BRIDGE_MODE_VEB;
7197 else
7198 mode = BRIDGE_MODE_VEPA;
7199
7200 return ndo_dflt_bridge_getlink(skb, pid, seq, dev, mode);
7201 }
7202
7203 static const struct net_device_ops ixgbe_netdev_ops = {
7204 .ndo_open = ixgbe_open,
7205 .ndo_stop = ixgbe_close,
7206 .ndo_start_xmit = ixgbe_xmit_frame,
7207 #ifdef IXGBE_FCOE
7208 .ndo_select_queue = ixgbe_select_queue,
7209 #endif
7210 .ndo_set_rx_mode = ixgbe_set_rx_mode,
7211 .ndo_validate_addr = eth_validate_addr,
7212 .ndo_set_mac_address = ixgbe_set_mac,
7213 .ndo_change_mtu = ixgbe_change_mtu,
7214 .ndo_tx_timeout = ixgbe_tx_timeout,
7215 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
7216 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
7217 .ndo_do_ioctl = ixgbe_ioctl,
7218 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
7219 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
7220 .ndo_set_vf_tx_rate = ixgbe_ndo_set_vf_bw,
7221 .ndo_set_vf_spoofchk = ixgbe_ndo_set_vf_spoofchk,
7222 .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
7223 .ndo_get_stats64 = ixgbe_get_stats64,
7224 #ifdef CONFIG_IXGBE_DCB
7225 .ndo_setup_tc = ixgbe_setup_tc,
7226 #endif
7227 #ifdef CONFIG_NET_POLL_CONTROLLER
7228 .ndo_poll_controller = ixgbe_netpoll,
7229 #endif
7230 #ifdef CONFIG_NET_LL_RX_POLL
7231 .ndo_busy_poll = ixgbe_low_latency_recv,
7232 #endif
7233 #ifdef IXGBE_FCOE
7234 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
7235 .ndo_fcoe_ddp_target = ixgbe_fcoe_ddp_target,
7236 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
7237 .ndo_fcoe_enable = ixgbe_fcoe_enable,
7238 .ndo_fcoe_disable = ixgbe_fcoe_disable,
7239 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
7240 .ndo_fcoe_get_hbainfo = ixgbe_fcoe_get_hbainfo,
7241 #endif /* IXGBE_FCOE */
7242 .ndo_set_features = ixgbe_set_features,
7243 .ndo_fix_features = ixgbe_fix_features,
7244 .ndo_fdb_add = ixgbe_ndo_fdb_add,
7245 .ndo_bridge_setlink = ixgbe_ndo_bridge_setlink,
7246 .ndo_bridge_getlink = ixgbe_ndo_bridge_getlink,
7247 };
7248
7249 /**
7250 * ixgbe_wol_supported - Check whether device supports WoL
7251 * @hw: hw specific details
7252 * @device_id: the device ID
7253 * @subdev_id: the subsystem device ID
7254 *
7255 * This function is used by probe and ethtool to determine
7256 * which devices have WoL support
7257 *
7258 **/
7259 int ixgbe_wol_supported(struct ixgbe_adapter *adapter, u16 device_id,
7260 u16 subdevice_id)
7261 {
7262 struct ixgbe_hw *hw = &adapter->hw;
7263 u16 wol_cap = adapter->eeprom_cap & IXGBE_DEVICE_CAPS_WOL_MASK;
7264 int is_wol_supported = 0;
7265
7266 switch (device_id) {
7267 case IXGBE_DEV_ID_82599_SFP:
7268 /* Only these subdevices could supports WOL */
7269 switch (subdevice_id) {
7270 case IXGBE_SUBDEV_ID_82599_560FLR:
7271 /* only support first port */
7272 if (hw->bus.func != 0)
7273 break;
7274 case IXGBE_SUBDEV_ID_82599_SP_560FLR:
7275 case IXGBE_SUBDEV_ID_82599_SFP:
7276 case IXGBE_SUBDEV_ID_82599_RNDC:
7277 case IXGBE_SUBDEV_ID_82599_ECNA_DP:
7278 case IXGBE_SUBDEV_ID_82599_LOM_SFP:
7279 is_wol_supported = 1;
7280 break;
7281 }
7282 break;
7283 case IXGBE_DEV_ID_82599EN_SFP:
7284 /* Only this subdevice supports WOL */
7285 switch (subdevice_id) {
7286 case IXGBE_SUBDEV_ID_82599EN_SFP_OCP1:
7287 is_wol_supported = 1;
7288 break;
7289 }
7290 break;
7291 case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
7292 /* All except this subdevice support WOL */
7293 if (subdevice_id != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ)
7294 is_wol_supported = 1;
7295 break;
7296 case IXGBE_DEV_ID_82599_KX4:
7297 is_wol_supported = 1;
7298 break;
7299 case IXGBE_DEV_ID_X540T:
7300 case IXGBE_DEV_ID_X540T1:
7301 /* check eeprom to see if enabled wol */
7302 if ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0_1) ||
7303 ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0) &&
7304 (hw->bus.func == 0))) {
7305 is_wol_supported = 1;
7306 }
7307 break;
7308 }
7309
7310 return is_wol_supported;
7311 }
7312
7313 /**
7314 * ixgbe_probe - Device Initialization Routine
7315 * @pdev: PCI device information struct
7316 * @ent: entry in ixgbe_pci_tbl
7317 *
7318 * Returns 0 on success, negative on failure
7319 *
7320 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
7321 * The OS initialization, configuring of the adapter private structure,
7322 * and a hardware reset occur.
7323 **/
7324 static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7325 {
7326 struct net_device *netdev;
7327 struct ixgbe_adapter *adapter = NULL;
7328 struct ixgbe_hw *hw;
7329 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
7330 static int cards_found;
7331 int i, err, pci_using_dac;
7332 unsigned int indices = MAX_TX_QUEUES;
7333 u8 part_str[IXGBE_PBANUM_LENGTH];
7334 #ifdef IXGBE_FCOE
7335 u16 device_caps;
7336 #endif
7337 u32 eec;
7338
7339 /* Catch broken hardware that put the wrong VF device ID in
7340 * the PCIe SR-IOV capability.
7341 */
7342 if (pdev->is_virtfn) {
7343 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
7344 pci_name(pdev), pdev->vendor, pdev->device);
7345 return -EINVAL;
7346 }
7347
7348 err = pci_enable_device_mem(pdev);
7349 if (err)
7350 return err;
7351
7352 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
7353 !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
7354 pci_using_dac = 1;
7355 } else {
7356 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
7357 if (err) {
7358 err = dma_set_coherent_mask(&pdev->dev,
7359 DMA_BIT_MASK(32));
7360 if (err) {
7361 dev_err(&pdev->dev,
7362 "No usable DMA configuration, aborting\n");
7363 goto err_dma;
7364 }
7365 }
7366 pci_using_dac = 0;
7367 }
7368
7369 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
7370 IORESOURCE_MEM), ixgbe_driver_name);
7371 if (err) {
7372 dev_err(&pdev->dev,
7373 "pci_request_selected_regions failed 0x%x\n", err);
7374 goto err_pci_reg;
7375 }
7376
7377 pci_enable_pcie_error_reporting(pdev);
7378
7379 pci_set_master(pdev);
7380 pci_save_state(pdev);
7381
7382 if (ii->mac == ixgbe_mac_82598EB) {
7383 #ifdef CONFIG_IXGBE_DCB
7384 /* 8 TC w/ 4 queues per TC */
7385 indices = 4 * MAX_TRAFFIC_CLASS;
7386 #else
7387 indices = IXGBE_MAX_RSS_INDICES;
7388 #endif
7389 }
7390
7391 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
7392 if (!netdev) {
7393 err = -ENOMEM;
7394 goto err_alloc_etherdev;
7395 }
7396
7397 SET_NETDEV_DEV(netdev, &pdev->dev);
7398
7399 adapter = netdev_priv(netdev);
7400 pci_set_drvdata(pdev, adapter);
7401
7402 adapter->netdev = netdev;
7403 adapter->pdev = pdev;
7404 hw = &adapter->hw;
7405 hw->back = adapter;
7406 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
7407
7408 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
7409 pci_resource_len(pdev, 0));
7410 if (!hw->hw_addr) {
7411 err = -EIO;
7412 goto err_ioremap;
7413 }
7414
7415 netdev->netdev_ops = &ixgbe_netdev_ops;
7416 ixgbe_set_ethtool_ops(netdev);
7417 netdev->watchdog_timeo = 5 * HZ;
7418 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
7419
7420 adapter->bd_number = cards_found;
7421
7422 /* Setup hw api */
7423 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
7424 hw->mac.type = ii->mac;
7425
7426 /* EEPROM */
7427 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
7428 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
7429 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
7430 if (!(eec & (1 << 8)))
7431 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
7432
7433 /* PHY */
7434 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
7435 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
7436 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
7437 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
7438 hw->phy.mdio.mmds = 0;
7439 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
7440 hw->phy.mdio.dev = netdev;
7441 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
7442 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
7443
7444 ii->get_invariants(hw);
7445
7446 /* setup the private structure */
7447 err = ixgbe_sw_init(adapter);
7448 if (err)
7449 goto err_sw_init;
7450
7451 /* Cache if MNG FW is up so we don't have to read the REG later */
7452 if (hw->mac.ops.mng_fw_enabled)
7453 hw->mng_fw_enabled = hw->mac.ops.mng_fw_enabled(hw);
7454
7455 /* Make it possible the adapter to be woken up via WOL */
7456 switch (adapter->hw.mac.type) {
7457 case ixgbe_mac_82599EB:
7458 case ixgbe_mac_X540:
7459 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7460 break;
7461 default:
7462 break;
7463 }
7464
7465 /*
7466 * If there is a fan on this device and it has failed log the
7467 * failure.
7468 */
7469 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
7470 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
7471 if (esdp & IXGBE_ESDP_SDP1)
7472 e_crit(probe, "Fan has stopped, replace the adapter\n");
7473 }
7474
7475 if (allow_unsupported_sfp)
7476 hw->allow_unsupported_sfp = allow_unsupported_sfp;
7477
7478 /* reset_hw fills in the perm_addr as well */
7479 hw->phy.reset_if_overtemp = true;
7480 err = hw->mac.ops.reset_hw(hw);
7481 hw->phy.reset_if_overtemp = false;
7482 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
7483 hw->mac.type == ixgbe_mac_82598EB) {
7484 err = 0;
7485 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
7486 e_dev_err("failed to load because an unsupported SFP+ "
7487 "module type was detected.\n");
7488 e_dev_err("Reload the driver after installing a supported "
7489 "module.\n");
7490 goto err_sw_init;
7491 } else if (err) {
7492 e_dev_err("HW Init failed: %d\n", err);
7493 goto err_sw_init;
7494 }
7495
7496 #ifdef CONFIG_PCI_IOV
7497 /* SR-IOV not supported on the 82598 */
7498 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
7499 goto skip_sriov;
7500 /* Mailbox */
7501 ixgbe_init_mbx_params_pf(hw);
7502 memcpy(&hw->mbx.ops, ii->mbx_ops, sizeof(hw->mbx.ops));
7503 ixgbe_enable_sriov(adapter);
7504 pci_sriov_set_totalvfs(pdev, 63);
7505 skip_sriov:
7506
7507 #endif
7508 netdev->features = NETIF_F_SG |
7509 NETIF_F_IP_CSUM |
7510 NETIF_F_IPV6_CSUM |
7511 NETIF_F_HW_VLAN_CTAG_TX |
7512 NETIF_F_HW_VLAN_CTAG_RX |
7513 NETIF_F_HW_VLAN_CTAG_FILTER |
7514 NETIF_F_TSO |
7515 NETIF_F_TSO6 |
7516 NETIF_F_RXHASH |
7517 NETIF_F_RXCSUM;
7518
7519 netdev->hw_features = netdev->features;
7520
7521 switch (adapter->hw.mac.type) {
7522 case ixgbe_mac_82599EB:
7523 case ixgbe_mac_X540:
7524 netdev->features |= NETIF_F_SCTP_CSUM;
7525 netdev->hw_features |= NETIF_F_SCTP_CSUM |
7526 NETIF_F_NTUPLE;
7527 break;
7528 default:
7529 break;
7530 }
7531
7532 netdev->hw_features |= NETIF_F_RXALL;
7533
7534 netdev->vlan_features |= NETIF_F_TSO;
7535 netdev->vlan_features |= NETIF_F_TSO6;
7536 netdev->vlan_features |= NETIF_F_IP_CSUM;
7537 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
7538 netdev->vlan_features |= NETIF_F_SG;
7539
7540 netdev->priv_flags |= IFF_UNICAST_FLT;
7541 netdev->priv_flags |= IFF_SUPP_NOFCS;
7542
7543 #ifdef CONFIG_IXGBE_DCB
7544 netdev->dcbnl_ops = &dcbnl_ops;
7545 #endif
7546
7547 #ifdef IXGBE_FCOE
7548 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
7549 unsigned int fcoe_l;
7550
7551 if (hw->mac.ops.get_device_caps) {
7552 hw->mac.ops.get_device_caps(hw, &device_caps);
7553 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
7554 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
7555 }
7556
7557
7558 fcoe_l = min_t(int, IXGBE_FCRETA_SIZE, num_online_cpus());
7559 adapter->ring_feature[RING_F_FCOE].limit = fcoe_l;
7560
7561 netdev->features |= NETIF_F_FSO |
7562 NETIF_F_FCOE_CRC;
7563
7564 netdev->vlan_features |= NETIF_F_FSO |
7565 NETIF_F_FCOE_CRC |
7566 NETIF_F_FCOE_MTU;
7567 }
7568 #endif /* IXGBE_FCOE */
7569 if (pci_using_dac) {
7570 netdev->features |= NETIF_F_HIGHDMA;
7571 netdev->vlan_features |= NETIF_F_HIGHDMA;
7572 }
7573
7574 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
7575 netdev->hw_features |= NETIF_F_LRO;
7576 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
7577 netdev->features |= NETIF_F_LRO;
7578
7579 /* make sure the EEPROM is good */
7580 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
7581 e_dev_err("The EEPROM Checksum Is Not Valid\n");
7582 err = -EIO;
7583 goto err_sw_init;
7584 }
7585
7586 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
7587
7588 if (!is_valid_ether_addr(netdev->dev_addr)) {
7589 e_dev_err("invalid MAC address\n");
7590 err = -EIO;
7591 goto err_sw_init;
7592 }
7593
7594 setup_timer(&adapter->service_timer, &ixgbe_service_timer,
7595 (unsigned long) adapter);
7596
7597 INIT_WORK(&adapter->service_task, ixgbe_service_task);
7598 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
7599
7600 err = ixgbe_init_interrupt_scheme(adapter);
7601 if (err)
7602 goto err_sw_init;
7603
7604 /* WOL not supported for all devices */
7605 adapter->wol = 0;
7606 hw->eeprom.ops.read(hw, 0x2c, &adapter->eeprom_cap);
7607 hw->wol_enabled = ixgbe_wol_supported(adapter, pdev->device,
7608 pdev->subsystem_device);
7609 if (hw->wol_enabled)
7610 adapter->wol = IXGBE_WUFC_MAG;
7611
7612 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
7613
7614 /* save off EEPROM version number */
7615 hw->eeprom.ops.read(hw, 0x2e, &adapter->eeprom_verh);
7616 hw->eeprom.ops.read(hw, 0x2d, &adapter->eeprom_verl);
7617
7618 /* pick up the PCI bus settings for reporting later */
7619 hw->mac.ops.get_bus_info(hw);
7620 if (hw->device_id == IXGBE_DEV_ID_82599_SFP_SF_QP)
7621 ixgbe_get_parent_bus_info(adapter);
7622
7623 /* print bus type/speed/width info */
7624 e_dev_info("(PCI Express:%s:%s) %pM\n",
7625 (hw->bus.speed == ixgbe_bus_speed_8000 ? "8.0GT/s" :
7626 hw->bus.speed == ixgbe_bus_speed_5000 ? "5.0GT/s" :
7627 hw->bus.speed == ixgbe_bus_speed_2500 ? "2.5GT/s" :
7628 "Unknown"),
7629 (hw->bus.width == ixgbe_bus_width_pcie_x8 ? "Width x8" :
7630 hw->bus.width == ixgbe_bus_width_pcie_x4 ? "Width x4" :
7631 hw->bus.width == ixgbe_bus_width_pcie_x1 ? "Width x1" :
7632 "Unknown"),
7633 netdev->dev_addr);
7634
7635 err = ixgbe_read_pba_string_generic(hw, part_str, IXGBE_PBANUM_LENGTH);
7636 if (err)
7637 strncpy(part_str, "Unknown", IXGBE_PBANUM_LENGTH);
7638 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
7639 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, PBA No: %s\n",
7640 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
7641 part_str);
7642 else
7643 e_dev_info("MAC: %d, PHY: %d, PBA No: %s\n",
7644 hw->mac.type, hw->phy.type, part_str);
7645
7646 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
7647 e_dev_warn("PCI-Express bandwidth available for this card is "
7648 "not sufficient for optimal performance.\n");
7649 e_dev_warn("For optimal performance a x8 PCI-Express slot "
7650 "is required.\n");
7651 }
7652
7653 /* reset the hardware with the new settings */
7654 err = hw->mac.ops.start_hw(hw);
7655 if (err == IXGBE_ERR_EEPROM_VERSION) {
7656 /* We are running on a pre-production device, log a warning */
7657 e_dev_warn("This device is a pre-production adapter/LOM. "
7658 "Please be aware there may be issues associated "
7659 "with your hardware. If you are experiencing "
7660 "problems please contact your Intel or hardware "
7661 "representative who provided you with this "
7662 "hardware.\n");
7663 }
7664 strcpy(netdev->name, "eth%d");
7665 err = register_netdev(netdev);
7666 if (err)
7667 goto err_register;
7668
7669 /* power down the optics for 82599 SFP+ fiber */
7670 if (hw->mac.ops.disable_tx_laser)
7671 hw->mac.ops.disable_tx_laser(hw);
7672
7673 /* carrier off reporting is important to ethtool even BEFORE open */
7674 netif_carrier_off(netdev);
7675
7676 #ifdef CONFIG_IXGBE_DCA
7677 if (dca_add_requester(&pdev->dev) == 0) {
7678 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
7679 ixgbe_setup_dca(adapter);
7680 }
7681 #endif
7682 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
7683 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
7684 for (i = 0; i < adapter->num_vfs; i++)
7685 ixgbe_vf_configuration(pdev, (i | 0x10000000));
7686 }
7687
7688 /* firmware requires driver version to be 0xFFFFFFFF
7689 * since os does not support feature
7690 */
7691 if (hw->mac.ops.set_fw_drv_ver)
7692 hw->mac.ops.set_fw_drv_ver(hw, 0xFF, 0xFF, 0xFF,
7693 0xFF);
7694
7695 /* add san mac addr to netdev */
7696 ixgbe_add_sanmac_netdev(netdev);
7697
7698 e_dev_info("%s\n", ixgbe_default_device_descr);
7699 cards_found++;
7700
7701 #ifdef CONFIG_IXGBE_HWMON
7702 if (ixgbe_sysfs_init(adapter))
7703 e_err(probe, "failed to allocate sysfs resources\n");
7704 #endif /* CONFIG_IXGBE_HWMON */
7705
7706 ixgbe_dbg_adapter_init(adapter);
7707
7708 /* Need link setup for MNG FW, else wait for IXGBE_UP */
7709 if (hw->mng_fw_enabled && hw->mac.ops.setup_link)
7710 hw->mac.ops.setup_link(hw,
7711 IXGBE_LINK_SPEED_10GB_FULL | IXGBE_LINK_SPEED_1GB_FULL,
7712 true);
7713
7714 return 0;
7715
7716 err_register:
7717 ixgbe_release_hw_control(adapter);
7718 ixgbe_clear_interrupt_scheme(adapter);
7719 err_sw_init:
7720 ixgbe_disable_sriov(adapter);
7721 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
7722 iounmap(hw->hw_addr);
7723 err_ioremap:
7724 free_netdev(netdev);
7725 err_alloc_etherdev:
7726 pci_release_selected_regions(pdev,
7727 pci_select_bars(pdev, IORESOURCE_MEM));
7728 err_pci_reg:
7729 err_dma:
7730 pci_disable_device(pdev);
7731 return err;
7732 }
7733
7734 /**
7735 * ixgbe_remove - Device Removal Routine
7736 * @pdev: PCI device information struct
7737 *
7738 * ixgbe_remove is called by the PCI subsystem to alert the driver
7739 * that it should release a PCI device. The could be caused by a
7740 * Hot-Plug event, or because the driver is going to be removed from
7741 * memory.
7742 **/
7743 static void ixgbe_remove(struct pci_dev *pdev)
7744 {
7745 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7746 struct net_device *netdev = adapter->netdev;
7747
7748 ixgbe_dbg_adapter_exit(adapter);
7749
7750 set_bit(__IXGBE_DOWN, &adapter->state);
7751 cancel_work_sync(&adapter->service_task);
7752
7753
7754 #ifdef CONFIG_IXGBE_DCA
7755 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
7756 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
7757 dca_remove_requester(&pdev->dev);
7758 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
7759 }
7760
7761 #endif
7762 #ifdef CONFIG_IXGBE_HWMON
7763 ixgbe_sysfs_exit(adapter);
7764 #endif /* CONFIG_IXGBE_HWMON */
7765
7766 /* remove the added san mac */
7767 ixgbe_del_sanmac_netdev(netdev);
7768
7769 if (netdev->reg_state == NETREG_REGISTERED)
7770 unregister_netdev(netdev);
7771
7772 #ifdef CONFIG_PCI_IOV
7773 /*
7774 * Only disable SR-IOV on unload if the user specified the now
7775 * deprecated max_vfs module parameter.
7776 */
7777 if (max_vfs)
7778 ixgbe_disable_sriov(adapter);
7779 #endif
7780 ixgbe_clear_interrupt_scheme(adapter);
7781
7782 ixgbe_release_hw_control(adapter);
7783
7784 #ifdef CONFIG_DCB
7785 kfree(adapter->ixgbe_ieee_pfc);
7786 kfree(adapter->ixgbe_ieee_ets);
7787
7788 #endif
7789 iounmap(adapter->hw.hw_addr);
7790 pci_release_selected_regions(pdev, pci_select_bars(pdev,
7791 IORESOURCE_MEM));
7792
7793 e_dev_info("complete\n");
7794
7795 free_netdev(netdev);
7796
7797 pci_disable_pcie_error_reporting(pdev);
7798
7799 pci_disable_device(pdev);
7800 }
7801
7802 /**
7803 * ixgbe_io_error_detected - called when PCI error is detected
7804 * @pdev: Pointer to PCI device
7805 * @state: The current pci connection state
7806 *
7807 * This function is called after a PCI bus error affecting
7808 * this device has been detected.
7809 */
7810 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
7811 pci_channel_state_t state)
7812 {
7813 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7814 struct net_device *netdev = adapter->netdev;
7815
7816 #ifdef CONFIG_PCI_IOV
7817 struct pci_dev *bdev, *vfdev;
7818 u32 dw0, dw1, dw2, dw3;
7819 int vf, pos;
7820 u16 req_id, pf_func;
7821
7822 if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
7823 adapter->num_vfs == 0)
7824 goto skip_bad_vf_detection;
7825
7826 bdev = pdev->bus->self;
7827 while (bdev && (pci_pcie_type(bdev) != PCI_EXP_TYPE_ROOT_PORT))
7828 bdev = bdev->bus->self;
7829
7830 if (!bdev)
7831 goto skip_bad_vf_detection;
7832
7833 pos = pci_find_ext_capability(bdev, PCI_EXT_CAP_ID_ERR);
7834 if (!pos)
7835 goto skip_bad_vf_detection;
7836
7837 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG, &dw0);
7838 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 4, &dw1);
7839 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 8, &dw2);
7840 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 12, &dw3);
7841
7842 req_id = dw1 >> 16;
7843 /* On the 82599 if bit 7 of the requestor ID is set then it's a VF */
7844 if (!(req_id & 0x0080))
7845 goto skip_bad_vf_detection;
7846
7847 pf_func = req_id & 0x01;
7848 if ((pf_func & 1) == (pdev->devfn & 1)) {
7849 unsigned int device_id;
7850
7851 vf = (req_id & 0x7F) >> 1;
7852 e_dev_err("VF %d has caused a PCIe error\n", vf);
7853 e_dev_err("TLP: dw0: %8.8x\tdw1: %8.8x\tdw2: "
7854 "%8.8x\tdw3: %8.8x\n",
7855 dw0, dw1, dw2, dw3);
7856 switch (adapter->hw.mac.type) {
7857 case ixgbe_mac_82599EB:
7858 device_id = IXGBE_82599_VF_DEVICE_ID;
7859 break;
7860 case ixgbe_mac_X540:
7861 device_id = IXGBE_X540_VF_DEVICE_ID;
7862 break;
7863 default:
7864 device_id = 0;
7865 break;
7866 }
7867
7868 /* Find the pci device of the offending VF */
7869 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL, device_id, NULL);
7870 while (vfdev) {
7871 if (vfdev->devfn == (req_id & 0xFF))
7872 break;
7873 vfdev = pci_get_device(PCI_VENDOR_ID_INTEL,
7874 device_id, vfdev);
7875 }
7876 /*
7877 * There's a slim chance the VF could have been hot plugged,
7878 * so if it is no longer present we don't need to issue the
7879 * VFLR. Just clean up the AER in that case.
7880 */
7881 if (vfdev) {
7882 e_dev_err("Issuing VFLR to VF %d\n", vf);
7883 pci_write_config_dword(vfdev, 0xA8, 0x00008000);
7884 /* Free device reference count */
7885 pci_dev_put(vfdev);
7886 }
7887
7888 pci_cleanup_aer_uncorrect_error_status(pdev);
7889 }
7890
7891 /*
7892 * Even though the error may have occurred on the other port
7893 * we still need to increment the vf error reference count for
7894 * both ports because the I/O resume function will be called
7895 * for both of them.
7896 */
7897 adapter->vferr_refcount++;
7898
7899 return PCI_ERS_RESULT_RECOVERED;
7900
7901 skip_bad_vf_detection:
7902 #endif /* CONFIG_PCI_IOV */
7903 netif_device_detach(netdev);
7904
7905 if (state == pci_channel_io_perm_failure)
7906 return PCI_ERS_RESULT_DISCONNECT;
7907
7908 if (netif_running(netdev))
7909 ixgbe_down(adapter);
7910 pci_disable_device(pdev);
7911
7912 /* Request a slot reset. */
7913 return PCI_ERS_RESULT_NEED_RESET;
7914 }
7915
7916 /**
7917 * ixgbe_io_slot_reset - called after the pci bus has been reset.
7918 * @pdev: Pointer to PCI device
7919 *
7920 * Restart the card from scratch, as if from a cold-boot.
7921 */
7922 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
7923 {
7924 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7925 pci_ers_result_t result;
7926 int err;
7927
7928 if (pci_enable_device_mem(pdev)) {
7929 e_err(probe, "Cannot re-enable PCI device after reset.\n");
7930 result = PCI_ERS_RESULT_DISCONNECT;
7931 } else {
7932 pci_set_master(pdev);
7933 pci_restore_state(pdev);
7934 pci_save_state(pdev);
7935
7936 pci_wake_from_d3(pdev, false);
7937
7938 ixgbe_reset(adapter);
7939 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7940 result = PCI_ERS_RESULT_RECOVERED;
7941 }
7942
7943 err = pci_cleanup_aer_uncorrect_error_status(pdev);
7944 if (err) {
7945 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
7946 "failed 0x%0x\n", err);
7947 /* non-fatal, continue */
7948 }
7949
7950 return result;
7951 }
7952
7953 /**
7954 * ixgbe_io_resume - called when traffic can start flowing again.
7955 * @pdev: Pointer to PCI device
7956 *
7957 * This callback is called when the error recovery driver tells us that
7958 * its OK to resume normal operation.
7959 */
7960 static void ixgbe_io_resume(struct pci_dev *pdev)
7961 {
7962 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7963 struct net_device *netdev = adapter->netdev;
7964
7965 #ifdef CONFIG_PCI_IOV
7966 if (adapter->vferr_refcount) {
7967 e_info(drv, "Resuming after VF err\n");
7968 adapter->vferr_refcount--;
7969 return;
7970 }
7971
7972 #endif
7973 if (netif_running(netdev))
7974 ixgbe_up(adapter);
7975
7976 netif_device_attach(netdev);
7977 }
7978
7979 static const struct pci_error_handlers ixgbe_err_handler = {
7980 .error_detected = ixgbe_io_error_detected,
7981 .slot_reset = ixgbe_io_slot_reset,
7982 .resume = ixgbe_io_resume,
7983 };
7984
7985 static struct pci_driver ixgbe_driver = {
7986 .name = ixgbe_driver_name,
7987 .id_table = ixgbe_pci_tbl,
7988 .probe = ixgbe_probe,
7989 .remove = ixgbe_remove,
7990 #ifdef CONFIG_PM
7991 .suspend = ixgbe_suspend,
7992 .resume = ixgbe_resume,
7993 #endif
7994 .shutdown = ixgbe_shutdown,
7995 .sriov_configure = ixgbe_pci_sriov_configure,
7996 .err_handler = &ixgbe_err_handler
7997 };
7998
7999 /**
8000 * ixgbe_init_module - Driver Registration Routine
8001 *
8002 * ixgbe_init_module is the first routine called when the driver is
8003 * loaded. All it does is register with the PCI subsystem.
8004 **/
8005 static int __init ixgbe_init_module(void)
8006 {
8007 int ret;
8008 pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
8009 pr_info("%s\n", ixgbe_copyright);
8010
8011 ixgbe_dbg_init();
8012
8013 ret = pci_register_driver(&ixgbe_driver);
8014 if (ret) {
8015 ixgbe_dbg_exit();
8016 return ret;
8017 }
8018
8019 #ifdef CONFIG_IXGBE_DCA
8020 dca_register_notify(&dca_notifier);
8021 #endif
8022
8023 return 0;
8024 }
8025
8026 module_init(ixgbe_init_module);
8027
8028 /**
8029 * ixgbe_exit_module - Driver Exit Cleanup Routine
8030 *
8031 * ixgbe_exit_module is called just before the driver is removed
8032 * from memory.
8033 **/
8034 static void __exit ixgbe_exit_module(void)
8035 {
8036 #ifdef CONFIG_IXGBE_DCA
8037 dca_unregister_notify(&dca_notifier);
8038 #endif
8039 pci_unregister_driver(&ixgbe_driver);
8040
8041 ixgbe_dbg_exit();
8042
8043 rcu_barrier(); /* Wait for completion of call_rcu()'s */
8044 }
8045
8046 #ifdef CONFIG_IXGBE_DCA
8047 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
8048 void *p)
8049 {
8050 int ret_val;
8051
8052 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
8053 __ixgbe_notify_dca);
8054
8055 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
8056 }
8057
8058 #endif /* CONFIG_IXGBE_DCA */
8059
8060 module_exit(ixgbe_exit_module);
8061
8062 /* ixgbe_main.c */
Linux kernel - Deliverables
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