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ixgbe: DCB use existing TX and RX queues
[deliverable/linux.git] / drivers / net / ixgbe / ixgbe_main.c
1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2011 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/pkt_sched.h>
39 #include <linux/ipv6.h>
40 #include <linux/slab.h>
41 #include <net/checksum.h>
42 #include <net/ip6_checksum.h>
43 #include <linux/ethtool.h>
44 #include <linux/if_vlan.h>
45 #include <linux/prefetch.h>
46 #include <scsi/fc/fc_fcoe.h>
47
48 #include "ixgbe.h"
49 #include "ixgbe_common.h"
50 #include "ixgbe_dcb_82599.h"
51 #include "ixgbe_sriov.h"
52
53 char ixgbe_driver_name[] = "ixgbe";
54 static const char ixgbe_driver_string[] =
55 "Intel(R) 10 Gigabit PCI Express Network Driver";
56 #define MAJ 3
57 #define MIN 3
58 #define BUILD 8
59 #define KFIX 2
60 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \
61 __stringify(BUILD) "-k" __stringify(KFIX)
62 const char ixgbe_driver_version[] = DRV_VERSION;
63 static const char ixgbe_copyright[] =
64 "Copyright (c) 1999-2011 Intel Corporation.";
65
66 static const struct ixgbe_info *ixgbe_info_tbl[] = {
67 [board_82598] = &ixgbe_82598_info,
68 [board_82599] = &ixgbe_82599_info,
69 [board_X540] = &ixgbe_X540_info,
70 };
71
72 /* ixgbe_pci_tbl - PCI Device ID Table
73 *
74 * Wildcard entries (PCI_ANY_ID) should come last
75 * Last entry must be all 0s
76 *
77 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
78 * Class, Class Mask, private data (not used) }
79 */
80 static DEFINE_PCI_DEVICE_TABLE(ixgbe_pci_tbl) = {
81 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598),
82 board_82598 },
83 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
84 board_82598 },
85 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
86 board_82598 },
87 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT),
88 board_82598 },
89 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2),
90 board_82598 },
91 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
92 board_82598 },
93 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT),
94 board_82598 },
95 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT),
96 board_82598 },
97 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM),
98 board_82598 },
99 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR),
100 board_82598 },
101 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM),
102 board_82598 },
103 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX),
104 board_82598 },
105 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4),
106 board_82599 },
107 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM),
108 board_82599 },
109 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR),
110 board_82599 },
111 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP),
112 board_82599 },
113 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM),
114 board_82599 },
115 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ),
116 board_82599 },
117 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4),
118 board_82599 },
119 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_BACKPLANE_FCOE),
120 board_82599 },
121 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_FCOE),
122 board_82599 },
123 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM),
124 board_82599 },
125 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE),
126 board_82599 },
127 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T),
128 board_X540 },
129 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF2),
130 board_82599 },
131 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_LS),
132 board_82599 },
133
134 /* required last entry */
135 {0, }
136 };
137 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
138
139 #ifdef CONFIG_IXGBE_DCA
140 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
141 void *p);
142 static struct notifier_block dca_notifier = {
143 .notifier_call = ixgbe_notify_dca,
144 .next = NULL,
145 .priority = 0
146 };
147 #endif
148
149 #ifdef CONFIG_PCI_IOV
150 static unsigned int max_vfs;
151 module_param(max_vfs, uint, 0);
152 MODULE_PARM_DESC(max_vfs,
153 "Maximum number of virtual functions to allocate per physical function");
154 #endif /* CONFIG_PCI_IOV */
155
156 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
157 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
158 MODULE_LICENSE("GPL");
159 MODULE_VERSION(DRV_VERSION);
160
161 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
162
163 static inline void ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
164 {
165 struct ixgbe_hw *hw = &adapter->hw;
166 u32 gcr;
167 u32 gpie;
168 u32 vmdctl;
169
170 #ifdef CONFIG_PCI_IOV
171 /* disable iov and allow time for transactions to clear */
172 pci_disable_sriov(adapter->pdev);
173 #endif
174
175 /* turn off device IOV mode */
176 gcr = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
177 gcr &= ~(IXGBE_GCR_EXT_SRIOV);
178 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr);
179 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
180 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
181 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
182
183 /* set default pool back to 0 */
184 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
185 vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
186 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
187
188 /* take a breather then clean up driver data */
189 msleep(100);
190
191 kfree(adapter->vfinfo);
192 adapter->vfinfo = NULL;
193
194 adapter->num_vfs = 0;
195 adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
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 watchog */
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_info;
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("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n");
382 for (n = 0; n < adapter->num_tx_queues; n++) {
383 tx_ring = adapter->tx_ring[n];
384 tx_buffer_info =
385 &tx_ring->tx_buffer_info[tx_ring->next_to_clean];
386 pr_info(" %5d %5X %5X %016llX %04X %3X %016llX\n",
387 n, tx_ring->next_to_use, tx_ring->next_to_clean,
388 (u64)tx_buffer_info->dma,
389 tx_buffer_info->length,
390 tx_buffer_info->next_to_watch,
391 (u64)tx_buffer_info->time_stamp);
392 }
393
394 /* Print TX Rings */
395 if (!netif_msg_tx_done(adapter))
396 goto rx_ring_summary;
397
398 dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
399
400 /* Transmit Descriptor Formats
401 *
402 * Advanced Transmit Descriptor
403 * +--------------------------------------------------------------+
404 * 0 | Buffer Address [63:0] |
405 * +--------------------------------------------------------------+
406 * 8 | PAYLEN | PORTS | IDX | STA | DCMD |DTYP | RSV | DTALEN |
407 * +--------------------------------------------------------------+
408 * 63 46 45 40 39 36 35 32 31 24 23 20 19 0
409 */
410
411 for (n = 0; n < adapter->num_tx_queues; n++) {
412 tx_ring = adapter->tx_ring[n];
413 pr_info("------------------------------------\n");
414 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index);
415 pr_info("------------------------------------\n");
416 pr_info("T [desc] [address 63:0 ] "
417 "[PlPOIdStDDt Ln] [bi->dma ] "
418 "leng ntw timestamp bi->skb\n");
419
420 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
421 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
422 tx_buffer_info = &tx_ring->tx_buffer_info[i];
423 u0 = (struct my_u0 *)tx_desc;
424 pr_info("T [0x%03X] %016llX %016llX %016llX"
425 " %04X %3X %016llX %p", i,
426 le64_to_cpu(u0->a),
427 le64_to_cpu(u0->b),
428 (u64)tx_buffer_info->dma,
429 tx_buffer_info->length,
430 tx_buffer_info->next_to_watch,
431 (u64)tx_buffer_info->time_stamp,
432 tx_buffer_info->skb);
433 if (i == tx_ring->next_to_use &&
434 i == tx_ring->next_to_clean)
435 pr_cont(" NTC/U\n");
436 else if (i == tx_ring->next_to_use)
437 pr_cont(" NTU\n");
438 else if (i == tx_ring->next_to_clean)
439 pr_cont(" NTC\n");
440 else
441 pr_cont("\n");
442
443 if (netif_msg_pktdata(adapter) &&
444 tx_buffer_info->dma != 0)
445 print_hex_dump(KERN_INFO, "",
446 DUMP_PREFIX_ADDRESS, 16, 1,
447 phys_to_virt(tx_buffer_info->dma),
448 tx_buffer_info->length, true);
449 }
450 }
451
452 /* Print RX Rings Summary */
453 rx_ring_summary:
454 dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
455 pr_info("Queue [NTU] [NTC]\n");
456 for (n = 0; n < adapter->num_rx_queues; n++) {
457 rx_ring = adapter->rx_ring[n];
458 pr_info("%5d %5X %5X\n",
459 n, rx_ring->next_to_use, rx_ring->next_to_clean);
460 }
461
462 /* Print RX Rings */
463 if (!netif_msg_rx_status(adapter))
464 goto exit;
465
466 dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
467
468 /* Advanced Receive Descriptor (Read) Format
469 * 63 1 0
470 * +-----------------------------------------------------+
471 * 0 | Packet Buffer Address [63:1] |A0/NSE|
472 * +----------------------------------------------+------+
473 * 8 | Header Buffer Address [63:1] | DD |
474 * +-----------------------------------------------------+
475 *
476 *
477 * Advanced Receive Descriptor (Write-Back) Format
478 *
479 * 63 48 47 32 31 30 21 20 16 15 4 3 0
480 * +------------------------------------------------------+
481 * 0 | Packet IP |SPH| HDR_LEN | RSV|Packet| RSS |
482 * | Checksum Ident | | | | Type | Type |
483 * +------------------------------------------------------+
484 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
485 * +------------------------------------------------------+
486 * 63 48 47 32 31 20 19 0
487 */
488 for (n = 0; n < adapter->num_rx_queues; n++) {
489 rx_ring = adapter->rx_ring[n];
490 pr_info("------------------------------------\n");
491 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index);
492 pr_info("------------------------------------\n");
493 pr_info("R [desc] [ PktBuf A0] "
494 "[ HeadBuf DD] [bi->dma ] [bi->skb] "
495 "<-- Adv Rx Read format\n");
496 pr_info("RWB[desc] [PcsmIpSHl PtRs] "
497 "[vl er S cks ln] ---------------- [bi->skb] "
498 "<-- Adv Rx Write-Back format\n");
499
500 for (i = 0; i < rx_ring->count; i++) {
501 rx_buffer_info = &rx_ring->rx_buffer_info[i];
502 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
503 u0 = (struct my_u0 *)rx_desc;
504 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
505 if (staterr & IXGBE_RXD_STAT_DD) {
506 /* Descriptor Done */
507 pr_info("RWB[0x%03X] %016llX "
508 "%016llX ---------------- %p", i,
509 le64_to_cpu(u0->a),
510 le64_to_cpu(u0->b),
511 rx_buffer_info->skb);
512 } else {
513 pr_info("R [0x%03X] %016llX "
514 "%016llX %016llX %p", i,
515 le64_to_cpu(u0->a),
516 le64_to_cpu(u0->b),
517 (u64)rx_buffer_info->dma,
518 rx_buffer_info->skb);
519
520 if (netif_msg_pktdata(adapter)) {
521 print_hex_dump(KERN_INFO, "",
522 DUMP_PREFIX_ADDRESS, 16, 1,
523 phys_to_virt(rx_buffer_info->dma),
524 rx_ring->rx_buf_len, true);
525
526 if (rx_ring->rx_buf_len
527 < IXGBE_RXBUFFER_2048)
528 print_hex_dump(KERN_INFO, "",
529 DUMP_PREFIX_ADDRESS, 16, 1,
530 phys_to_virt(
531 rx_buffer_info->page_dma +
532 rx_buffer_info->page_offset
533 ),
534 PAGE_SIZE/2, true);
535 }
536 }
537
538 if (i == rx_ring->next_to_use)
539 pr_cont(" NTU\n");
540 else if (i == rx_ring->next_to_clean)
541 pr_cont(" NTC\n");
542 else
543 pr_cont("\n");
544
545 }
546 }
547
548 exit:
549 return;
550 }
551
552 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
553 {
554 u32 ctrl_ext;
555
556 /* Let firmware take over control of h/w */
557 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
558 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
559 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
560 }
561
562 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
563 {
564 u32 ctrl_ext;
565
566 /* Let firmware know the driver has taken over */
567 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
568 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
569 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
570 }
571
572 /*
573 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
574 * @adapter: pointer to adapter struct
575 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
576 * @queue: queue to map the corresponding interrupt to
577 * @msix_vector: the vector to map to the corresponding queue
578 *
579 */
580 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
581 u8 queue, u8 msix_vector)
582 {
583 u32 ivar, index;
584 struct ixgbe_hw *hw = &adapter->hw;
585 switch (hw->mac.type) {
586 case ixgbe_mac_82598EB:
587 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
588 if (direction == -1)
589 direction = 0;
590 index = (((direction * 64) + queue) >> 2) & 0x1F;
591 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
592 ivar &= ~(0xFF << (8 * (queue & 0x3)));
593 ivar |= (msix_vector << (8 * (queue & 0x3)));
594 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
595 break;
596 case ixgbe_mac_82599EB:
597 case ixgbe_mac_X540:
598 if (direction == -1) {
599 /* other causes */
600 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
601 index = ((queue & 1) * 8);
602 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
603 ivar &= ~(0xFF << index);
604 ivar |= (msix_vector << index);
605 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
606 break;
607 } else {
608 /* tx or rx causes */
609 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
610 index = ((16 * (queue & 1)) + (8 * direction));
611 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
612 ivar &= ~(0xFF << index);
613 ivar |= (msix_vector << index);
614 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
615 break;
616 }
617 default:
618 break;
619 }
620 }
621
622 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
623 u64 qmask)
624 {
625 u32 mask;
626
627 switch (adapter->hw.mac.type) {
628 case ixgbe_mac_82598EB:
629 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
630 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
631 break;
632 case ixgbe_mac_82599EB:
633 case ixgbe_mac_X540:
634 mask = (qmask & 0xFFFFFFFF);
635 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
636 mask = (qmask >> 32);
637 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
638 break;
639 default:
640 break;
641 }
642 }
643
644 void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *tx_ring,
645 struct ixgbe_tx_buffer *tx_buffer_info)
646 {
647 if (tx_buffer_info->dma) {
648 if (tx_buffer_info->mapped_as_page)
649 dma_unmap_page(tx_ring->dev,
650 tx_buffer_info->dma,
651 tx_buffer_info->length,
652 DMA_TO_DEVICE);
653 else
654 dma_unmap_single(tx_ring->dev,
655 tx_buffer_info->dma,
656 tx_buffer_info->length,
657 DMA_TO_DEVICE);
658 tx_buffer_info->dma = 0;
659 }
660 if (tx_buffer_info->skb) {
661 dev_kfree_skb_any(tx_buffer_info->skb);
662 tx_buffer_info->skb = NULL;
663 }
664 tx_buffer_info->time_stamp = 0;
665 /* tx_buffer_info must be completely set up in the transmit path */
666 }
667
668 /**
669 * ixgbe_dcb_txq_to_tc - convert a reg index to a traffic class
670 * @adapter: driver private struct
671 * @index: reg idx of queue to query (0-127)
672 *
673 * Helper function to determine the traffic index for a particular
674 * register index.
675 *
676 * Returns : a tc index for use in range 0-7, or 0-3
677 */
678 static u8 ixgbe_dcb_txq_to_tc(struct ixgbe_adapter *adapter, u8 reg_idx)
679 {
680 int tc = -1;
681 int dcb_i = netdev_get_num_tc(adapter->netdev);
682
683 /* if DCB is not enabled the queues have no TC */
684 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
685 return tc;
686
687 /* check valid range */
688 if (reg_idx >= adapter->hw.mac.max_tx_queues)
689 return tc;
690
691 switch (adapter->hw.mac.type) {
692 case ixgbe_mac_82598EB:
693 tc = reg_idx >> 2;
694 break;
695 default:
696 if (dcb_i != 4 && dcb_i != 8)
697 break;
698
699 /* if VMDq is enabled the lowest order bits determine TC */
700 if (adapter->flags & (IXGBE_FLAG_SRIOV_ENABLED |
701 IXGBE_FLAG_VMDQ_ENABLED)) {
702 tc = reg_idx & (dcb_i - 1);
703 break;
704 }
705
706 /*
707 * Convert the reg_idx into the correct TC. This bitmask
708 * targets the last full 32 ring traffic class and assigns
709 * it a value of 1. From there the rest of the rings are
710 * based on shifting the mask further up to include the
711 * reg_idx / 16 and then reg_idx / 8. It assumes dcB_i
712 * will only ever be 8 or 4 and that reg_idx will never
713 * be greater then 128. The code without the power of 2
714 * optimizations would be:
715 * (((reg_idx % 32) + 32) * dcb_i) >> (9 - reg_idx / 32)
716 */
717 tc = ((reg_idx & 0X1F) + 0x20) * dcb_i;
718 tc >>= 9 - (reg_idx >> 5);
719 }
720
721 return tc;
722 }
723
724 static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter)
725 {
726 struct ixgbe_hw *hw = &adapter->hw;
727 struct ixgbe_hw_stats *hwstats = &adapter->stats;
728 u32 data = 0;
729 u32 xoff[8] = {0};
730 int i;
731
732 if ((hw->fc.current_mode == ixgbe_fc_full) ||
733 (hw->fc.current_mode == ixgbe_fc_rx_pause)) {
734 switch (hw->mac.type) {
735 case ixgbe_mac_82598EB:
736 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
737 break;
738 default:
739 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
740 }
741 hwstats->lxoffrxc += data;
742
743 /* refill credits (no tx hang) if we received xoff */
744 if (!data)
745 return;
746
747 for (i = 0; i < adapter->num_tx_queues; i++)
748 clear_bit(__IXGBE_HANG_CHECK_ARMED,
749 &adapter->tx_ring[i]->state);
750 return;
751 } else if (!(adapter->dcb_cfg.pfc_mode_enable))
752 return;
753
754 /* update stats for each tc, only valid with PFC enabled */
755 for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) {
756 switch (hw->mac.type) {
757 case ixgbe_mac_82598EB:
758 xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
759 break;
760 default:
761 xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
762 }
763 hwstats->pxoffrxc[i] += xoff[i];
764 }
765
766 /* disarm tx queues that have received xoff frames */
767 for (i = 0; i < adapter->num_tx_queues; i++) {
768 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
769 u32 tc = ixgbe_dcb_txq_to_tc(adapter, tx_ring->reg_idx);
770
771 if (xoff[tc])
772 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
773 }
774 }
775
776 static u64 ixgbe_get_tx_completed(struct ixgbe_ring *ring)
777 {
778 return ring->tx_stats.completed;
779 }
780
781 static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring)
782 {
783 struct ixgbe_adapter *adapter = netdev_priv(ring->netdev);
784 struct ixgbe_hw *hw = &adapter->hw;
785
786 u32 head = IXGBE_READ_REG(hw, IXGBE_TDH(ring->reg_idx));
787 u32 tail = IXGBE_READ_REG(hw, IXGBE_TDT(ring->reg_idx));
788
789 if (head != tail)
790 return (head < tail) ?
791 tail - head : (tail + ring->count - head);
792
793 return 0;
794 }
795
796 static inline bool ixgbe_check_tx_hang(struct ixgbe_ring *tx_ring)
797 {
798 u32 tx_done = ixgbe_get_tx_completed(tx_ring);
799 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
800 u32 tx_pending = ixgbe_get_tx_pending(tx_ring);
801 bool ret = false;
802
803 clear_check_for_tx_hang(tx_ring);
804
805 /*
806 * Check for a hung queue, but be thorough. This verifies
807 * that a transmit has been completed since the previous
808 * check AND there is at least one packet pending. The
809 * ARMED bit is set to indicate a potential hang. The
810 * bit is cleared if a pause frame is received to remove
811 * false hang detection due to PFC or 802.3x frames. By
812 * requiring this to fail twice we avoid races with
813 * pfc clearing the ARMED bit and conditions where we
814 * run the check_tx_hang logic with a transmit completion
815 * pending but without time to complete it yet.
816 */
817 if ((tx_done_old == tx_done) && tx_pending) {
818 /* make sure it is true for two checks in a row */
819 ret = test_and_set_bit(__IXGBE_HANG_CHECK_ARMED,
820 &tx_ring->state);
821 } else {
822 /* update completed stats and continue */
823 tx_ring->tx_stats.tx_done_old = tx_done;
824 /* reset the countdown */
825 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
826 }
827
828 return ret;
829 }
830
831 #define IXGBE_MAX_TXD_PWR 14
832 #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
833
834 /* Tx Descriptors needed, worst case */
835 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
836 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
837 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
838 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
839
840 /**
841 * ixgbe_tx_timeout_reset - initiate reset due to Tx timeout
842 * @adapter: driver private struct
843 **/
844 static void ixgbe_tx_timeout_reset(struct ixgbe_adapter *adapter)
845 {
846
847 /* Do the reset outside of interrupt context */
848 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
849 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
850 ixgbe_service_event_schedule(adapter);
851 }
852 }
853
854 /**
855 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
856 * @q_vector: structure containing interrupt and ring information
857 * @tx_ring: tx ring to clean
858 **/
859 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
860 struct ixgbe_ring *tx_ring)
861 {
862 struct ixgbe_adapter *adapter = q_vector->adapter;
863 union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
864 struct ixgbe_tx_buffer *tx_buffer_info;
865 unsigned int total_bytes = 0, total_packets = 0;
866 u16 i, eop, count = 0;
867
868 i = tx_ring->next_to_clean;
869 eop = tx_ring->tx_buffer_info[i].next_to_watch;
870 eop_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
871
872 while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
873 (count < tx_ring->work_limit)) {
874 bool cleaned = false;
875 rmb(); /* read buffer_info after eop_desc */
876 for ( ; !cleaned; count++) {
877 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
878 tx_buffer_info = &tx_ring->tx_buffer_info[i];
879
880 tx_desc->wb.status = 0;
881 cleaned = (i == eop);
882
883 i++;
884 if (i == tx_ring->count)
885 i = 0;
886
887 if (cleaned && tx_buffer_info->skb) {
888 total_bytes += tx_buffer_info->bytecount;
889 total_packets += tx_buffer_info->gso_segs;
890 }
891
892 ixgbe_unmap_and_free_tx_resource(tx_ring,
893 tx_buffer_info);
894 }
895
896 tx_ring->tx_stats.completed++;
897 eop = tx_ring->tx_buffer_info[i].next_to_watch;
898 eop_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
899 }
900
901 tx_ring->next_to_clean = i;
902 tx_ring->total_bytes += total_bytes;
903 tx_ring->total_packets += total_packets;
904 u64_stats_update_begin(&tx_ring->syncp);
905 tx_ring->stats.packets += total_packets;
906 tx_ring->stats.bytes += total_bytes;
907 u64_stats_update_end(&tx_ring->syncp);
908
909 if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring)) {
910 /* schedule immediate reset if we believe we hung */
911 struct ixgbe_hw *hw = &adapter->hw;
912 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
913 e_err(drv, "Detected Tx Unit Hang\n"
914 " Tx Queue <%d>\n"
915 " TDH, TDT <%x>, <%x>\n"
916 " next_to_use <%x>\n"
917 " next_to_clean <%x>\n"
918 "tx_buffer_info[next_to_clean]\n"
919 " time_stamp <%lx>\n"
920 " jiffies <%lx>\n",
921 tx_ring->queue_index,
922 IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)),
923 IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)),
924 tx_ring->next_to_use, eop,
925 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
926
927 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
928
929 e_info(probe,
930 "tx hang %d detected on queue %d, resetting adapter\n",
931 adapter->tx_timeout_count + 1, tx_ring->queue_index);
932
933 /* schedule immediate reset if we believe we hung */
934 ixgbe_tx_timeout_reset(adapter);
935
936 /* the adapter is about to reset, no point in enabling stuff */
937 return true;
938 }
939
940 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
941 if (unlikely(count && netif_carrier_ok(tx_ring->netdev) &&
942 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
943 /* Make sure that anybody stopping the queue after this
944 * sees the new next_to_clean.
945 */
946 smp_mb();
947 if (__netif_subqueue_stopped(tx_ring->netdev, tx_ring->queue_index) &&
948 !test_bit(__IXGBE_DOWN, &adapter->state)) {
949 netif_wake_subqueue(tx_ring->netdev, tx_ring->queue_index);
950 ++tx_ring->tx_stats.restart_queue;
951 }
952 }
953
954 return count < tx_ring->work_limit;
955 }
956
957 #ifdef CONFIG_IXGBE_DCA
958 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
959 struct ixgbe_ring *rx_ring,
960 int cpu)
961 {
962 struct ixgbe_hw *hw = &adapter->hw;
963 u32 rxctrl;
964 u8 reg_idx = rx_ring->reg_idx;
965
966 rxctrl = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(reg_idx));
967 switch (hw->mac.type) {
968 case ixgbe_mac_82598EB:
969 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
970 rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
971 break;
972 case ixgbe_mac_82599EB:
973 case ixgbe_mac_X540:
974 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
975 rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
976 IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
977 break;
978 default:
979 break;
980 }
981 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
982 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
983 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
984 IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl);
985 }
986
987 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
988 struct ixgbe_ring *tx_ring,
989 int cpu)
990 {
991 struct ixgbe_hw *hw = &adapter->hw;
992 u32 txctrl;
993 u8 reg_idx = tx_ring->reg_idx;
994
995 switch (hw->mac.type) {
996 case ixgbe_mac_82598EB:
997 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(reg_idx));
998 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
999 txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
1000 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
1001 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(reg_idx), txctrl);
1002 break;
1003 case ixgbe_mac_82599EB:
1004 case ixgbe_mac_X540:
1005 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(reg_idx));
1006 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
1007 txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
1008 IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
1009 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
1010 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(reg_idx), txctrl);
1011 break;
1012 default:
1013 break;
1014 }
1015 }
1016
1017 static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
1018 {
1019 struct ixgbe_adapter *adapter = q_vector->adapter;
1020 int cpu = get_cpu();
1021 long r_idx;
1022 int i;
1023
1024 if (q_vector->cpu == cpu)
1025 goto out_no_update;
1026
1027 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1028 for (i = 0; i < q_vector->txr_count; i++) {
1029 ixgbe_update_tx_dca(adapter, adapter->tx_ring[r_idx], cpu);
1030 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1031 r_idx + 1);
1032 }
1033
1034 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1035 for (i = 0; i < q_vector->rxr_count; i++) {
1036 ixgbe_update_rx_dca(adapter, adapter->rx_ring[r_idx], cpu);
1037 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1038 r_idx + 1);
1039 }
1040
1041 q_vector->cpu = cpu;
1042 out_no_update:
1043 put_cpu();
1044 }
1045
1046 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
1047 {
1048 int num_q_vectors;
1049 int i;
1050
1051 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
1052 return;
1053
1054 /* always use CB2 mode, difference is masked in the CB driver */
1055 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
1056
1057 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
1058 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1059 else
1060 num_q_vectors = 1;
1061
1062 for (i = 0; i < num_q_vectors; i++) {
1063 adapter->q_vector[i]->cpu = -1;
1064 ixgbe_update_dca(adapter->q_vector[i]);
1065 }
1066 }
1067
1068 static int __ixgbe_notify_dca(struct device *dev, void *data)
1069 {
1070 struct ixgbe_adapter *adapter = dev_get_drvdata(dev);
1071 unsigned long event = *(unsigned long *)data;
1072
1073 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
1074 return 0;
1075
1076 switch (event) {
1077 case DCA_PROVIDER_ADD:
1078 /* if we're already enabled, don't do it again */
1079 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1080 break;
1081 if (dca_add_requester(dev) == 0) {
1082 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
1083 ixgbe_setup_dca(adapter);
1084 break;
1085 }
1086 /* Fall Through since DCA is disabled. */
1087 case DCA_PROVIDER_REMOVE:
1088 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
1089 dca_remove_requester(dev);
1090 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
1091 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
1092 }
1093 break;
1094 }
1095
1096 return 0;
1097 }
1098 #endif /* CONFIG_IXGBE_DCA */
1099
1100 static inline void ixgbe_rx_hash(union ixgbe_adv_rx_desc *rx_desc,
1101 struct sk_buff *skb)
1102 {
1103 skb->rxhash = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
1104 }
1105
1106 /**
1107 * ixgbe_receive_skb - Send a completed packet up the stack
1108 * @adapter: board private structure
1109 * @skb: packet to send up
1110 * @status: hardware indication of status of receive
1111 * @rx_ring: rx descriptor ring (for a specific queue) to setup
1112 * @rx_desc: rx descriptor
1113 **/
1114 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
1115 struct sk_buff *skb, u8 status,
1116 struct ixgbe_ring *ring,
1117 union ixgbe_adv_rx_desc *rx_desc)
1118 {
1119 struct ixgbe_adapter *adapter = q_vector->adapter;
1120 struct napi_struct *napi = &q_vector->napi;
1121 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
1122 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
1123
1124 if (is_vlan && (tag & VLAN_VID_MASK))
1125 __vlan_hwaccel_put_tag(skb, tag);
1126
1127 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
1128 napi_gro_receive(napi, skb);
1129 else
1130 netif_rx(skb);
1131 }
1132
1133 /**
1134 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
1135 * @adapter: address of board private structure
1136 * @status_err: hardware indication of status of receive
1137 * @skb: skb currently being received and modified
1138 **/
1139 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
1140 union ixgbe_adv_rx_desc *rx_desc,
1141 struct sk_buff *skb)
1142 {
1143 u32 status_err = le32_to_cpu(rx_desc->wb.upper.status_error);
1144
1145 skb_checksum_none_assert(skb);
1146
1147 /* Rx csum disabled */
1148 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
1149 return;
1150
1151 /* if IP and error */
1152 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
1153 (status_err & IXGBE_RXDADV_ERR_IPE)) {
1154 adapter->hw_csum_rx_error++;
1155 return;
1156 }
1157
1158 if (!(status_err & IXGBE_RXD_STAT_L4CS))
1159 return;
1160
1161 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
1162 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1163
1164 /*
1165 * 82599 errata, UDP frames with a 0 checksum can be marked as
1166 * checksum errors.
1167 */
1168 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
1169 (adapter->hw.mac.type == ixgbe_mac_82599EB))
1170 return;
1171
1172 adapter->hw_csum_rx_error++;
1173 return;
1174 }
1175
1176 /* It must be a TCP or UDP packet with a valid checksum */
1177 skb->ip_summed = CHECKSUM_UNNECESSARY;
1178 }
1179
1180 static inline void ixgbe_release_rx_desc(struct ixgbe_ring *rx_ring, u32 val)
1181 {
1182 /*
1183 * Force memory writes to complete before letting h/w
1184 * know there are new descriptors to fetch. (Only
1185 * applicable for weak-ordered memory model archs,
1186 * such as IA-64).
1187 */
1188 wmb();
1189 writel(val, rx_ring->tail);
1190 }
1191
1192 /**
1193 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
1194 * @rx_ring: ring to place buffers on
1195 * @cleaned_count: number of buffers to replace
1196 **/
1197 void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count)
1198 {
1199 union ixgbe_adv_rx_desc *rx_desc;
1200 struct ixgbe_rx_buffer *bi;
1201 struct sk_buff *skb;
1202 u16 i = rx_ring->next_to_use;
1203
1204 /* do nothing if no valid netdev defined */
1205 if (!rx_ring->netdev)
1206 return;
1207
1208 while (cleaned_count--) {
1209 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1210 bi = &rx_ring->rx_buffer_info[i];
1211 skb = bi->skb;
1212
1213 if (!skb) {
1214 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
1215 rx_ring->rx_buf_len);
1216 if (!skb) {
1217 rx_ring->rx_stats.alloc_rx_buff_failed++;
1218 goto no_buffers;
1219 }
1220 /* initialize queue mapping */
1221 skb_record_rx_queue(skb, rx_ring->queue_index);
1222 bi->skb = skb;
1223 }
1224
1225 if (!bi->dma) {
1226 bi->dma = dma_map_single(rx_ring->dev,
1227 skb->data,
1228 rx_ring->rx_buf_len,
1229 DMA_FROM_DEVICE);
1230 if (dma_mapping_error(rx_ring->dev, bi->dma)) {
1231 rx_ring->rx_stats.alloc_rx_buff_failed++;
1232 bi->dma = 0;
1233 goto no_buffers;
1234 }
1235 }
1236
1237 if (ring_is_ps_enabled(rx_ring)) {
1238 if (!bi->page) {
1239 bi->page = netdev_alloc_page(rx_ring->netdev);
1240 if (!bi->page) {
1241 rx_ring->rx_stats.alloc_rx_page_failed++;
1242 goto no_buffers;
1243 }
1244 }
1245
1246 if (!bi->page_dma) {
1247 /* use a half page if we're re-using */
1248 bi->page_offset ^= PAGE_SIZE / 2;
1249 bi->page_dma = dma_map_page(rx_ring->dev,
1250 bi->page,
1251 bi->page_offset,
1252 PAGE_SIZE / 2,
1253 DMA_FROM_DEVICE);
1254 if (dma_mapping_error(rx_ring->dev,
1255 bi->page_dma)) {
1256 rx_ring->rx_stats.alloc_rx_page_failed++;
1257 bi->page_dma = 0;
1258 goto no_buffers;
1259 }
1260 }
1261
1262 /* Refresh the desc even if buffer_addrs didn't change
1263 * because each write-back erases this info. */
1264 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
1265 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
1266 } else {
1267 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
1268 rx_desc->read.hdr_addr = 0;
1269 }
1270
1271 i++;
1272 if (i == rx_ring->count)
1273 i = 0;
1274 }
1275
1276 no_buffers:
1277 if (rx_ring->next_to_use != i) {
1278 rx_ring->next_to_use = i;
1279 ixgbe_release_rx_desc(rx_ring, i);
1280 }
1281 }
1282
1283 static inline u16 ixgbe_get_hlen(union ixgbe_adv_rx_desc *rx_desc)
1284 {
1285 /* HW will not DMA in data larger than the given buffer, even if it
1286 * parses the (NFS, of course) header to be larger. In that case, it
1287 * fills the header buffer and spills the rest into the page.
1288 */
1289 u16 hdr_info = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info);
1290 u16 hlen = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
1291 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
1292 if (hlen > IXGBE_RX_HDR_SIZE)
1293 hlen = IXGBE_RX_HDR_SIZE;
1294 return hlen;
1295 }
1296
1297 /**
1298 * ixgbe_transform_rsc_queue - change rsc queue into a full packet
1299 * @skb: pointer to the last skb in the rsc queue
1300 *
1301 * This function changes a queue full of hw rsc buffers into a completed
1302 * packet. It uses the ->prev pointers to find the first packet and then
1303 * turns it into the frag list owner.
1304 **/
1305 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb)
1306 {
1307 unsigned int frag_list_size = 0;
1308 unsigned int skb_cnt = 1;
1309
1310 while (skb->prev) {
1311 struct sk_buff *prev = skb->prev;
1312 frag_list_size += skb->len;
1313 skb->prev = NULL;
1314 skb = prev;
1315 skb_cnt++;
1316 }
1317
1318 skb_shinfo(skb)->frag_list = skb->next;
1319 skb->next = NULL;
1320 skb->len += frag_list_size;
1321 skb->data_len += frag_list_size;
1322 skb->truesize += frag_list_size;
1323 IXGBE_RSC_CB(skb)->skb_cnt = skb_cnt;
1324
1325 return skb;
1326 }
1327
1328 static inline bool ixgbe_get_rsc_state(union ixgbe_adv_rx_desc *rx_desc)
1329 {
1330 return !!(le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
1331 IXGBE_RXDADV_RSCCNT_MASK);
1332 }
1333
1334 static void ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
1335 struct ixgbe_ring *rx_ring,
1336 int *work_done, int work_to_do)
1337 {
1338 struct ixgbe_adapter *adapter = q_vector->adapter;
1339 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
1340 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
1341 struct sk_buff *skb;
1342 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1343 const int current_node = numa_node_id();
1344 #ifdef IXGBE_FCOE
1345 int ddp_bytes = 0;
1346 #endif /* IXGBE_FCOE */
1347 u32 staterr;
1348 u16 i;
1349 u16 cleaned_count = 0;
1350 bool pkt_is_rsc = false;
1351
1352 i = rx_ring->next_to_clean;
1353 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1354 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1355
1356 while (staterr & IXGBE_RXD_STAT_DD) {
1357 u32 upper_len = 0;
1358
1359 rmb(); /* read descriptor and rx_buffer_info after status DD */
1360
1361 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1362
1363 skb = rx_buffer_info->skb;
1364 rx_buffer_info->skb = NULL;
1365 prefetch(skb->data);
1366
1367 if (ring_is_rsc_enabled(rx_ring))
1368 pkt_is_rsc = ixgbe_get_rsc_state(rx_desc);
1369
1370 /* if this is a skb from previous receive DMA will be 0 */
1371 if (rx_buffer_info->dma) {
1372 u16 hlen;
1373 if (pkt_is_rsc &&
1374 !(staterr & IXGBE_RXD_STAT_EOP) &&
1375 !skb->prev) {
1376 /*
1377 * When HWRSC is enabled, delay unmapping
1378 * of the first packet. It carries the
1379 * header information, HW may still
1380 * access the header after the writeback.
1381 * Only unmap it when EOP is reached
1382 */
1383 IXGBE_RSC_CB(skb)->delay_unmap = true;
1384 IXGBE_RSC_CB(skb)->dma = rx_buffer_info->dma;
1385 } else {
1386 dma_unmap_single(rx_ring->dev,
1387 rx_buffer_info->dma,
1388 rx_ring->rx_buf_len,
1389 DMA_FROM_DEVICE);
1390 }
1391 rx_buffer_info->dma = 0;
1392
1393 if (ring_is_ps_enabled(rx_ring)) {
1394 hlen = ixgbe_get_hlen(rx_desc);
1395 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
1396 } else {
1397 hlen = le16_to_cpu(rx_desc->wb.upper.length);
1398 }
1399
1400 skb_put(skb, hlen);
1401 } else {
1402 /* assume packet split since header is unmapped */
1403 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
1404 }
1405
1406 if (upper_len) {
1407 dma_unmap_page(rx_ring->dev,
1408 rx_buffer_info->page_dma,
1409 PAGE_SIZE / 2,
1410 DMA_FROM_DEVICE);
1411 rx_buffer_info->page_dma = 0;
1412 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
1413 rx_buffer_info->page,
1414 rx_buffer_info->page_offset,
1415 upper_len);
1416
1417 if ((page_count(rx_buffer_info->page) == 1) &&
1418 (page_to_nid(rx_buffer_info->page) == current_node))
1419 get_page(rx_buffer_info->page);
1420 else
1421 rx_buffer_info->page = NULL;
1422
1423 skb->len += upper_len;
1424 skb->data_len += upper_len;
1425 skb->truesize += upper_len;
1426 }
1427
1428 i++;
1429 if (i == rx_ring->count)
1430 i = 0;
1431
1432 next_rxd = IXGBE_RX_DESC_ADV(rx_ring, i);
1433 prefetch(next_rxd);
1434 cleaned_count++;
1435
1436 if (pkt_is_rsc) {
1437 u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
1438 IXGBE_RXDADV_NEXTP_SHIFT;
1439 next_buffer = &rx_ring->rx_buffer_info[nextp];
1440 } else {
1441 next_buffer = &rx_ring->rx_buffer_info[i];
1442 }
1443
1444 if (!(staterr & IXGBE_RXD_STAT_EOP)) {
1445 if (ring_is_ps_enabled(rx_ring)) {
1446 rx_buffer_info->skb = next_buffer->skb;
1447 rx_buffer_info->dma = next_buffer->dma;
1448 next_buffer->skb = skb;
1449 next_buffer->dma = 0;
1450 } else {
1451 skb->next = next_buffer->skb;
1452 skb->next->prev = skb;
1453 }
1454 rx_ring->rx_stats.non_eop_descs++;
1455 goto next_desc;
1456 }
1457
1458 if (skb->prev) {
1459 skb = ixgbe_transform_rsc_queue(skb);
1460 /* if we got here without RSC the packet is invalid */
1461 if (!pkt_is_rsc) {
1462 __pskb_trim(skb, 0);
1463 rx_buffer_info->skb = skb;
1464 goto next_desc;
1465 }
1466 }
1467
1468 if (ring_is_rsc_enabled(rx_ring)) {
1469 if (IXGBE_RSC_CB(skb)->delay_unmap) {
1470 dma_unmap_single(rx_ring->dev,
1471 IXGBE_RSC_CB(skb)->dma,
1472 rx_ring->rx_buf_len,
1473 DMA_FROM_DEVICE);
1474 IXGBE_RSC_CB(skb)->dma = 0;
1475 IXGBE_RSC_CB(skb)->delay_unmap = false;
1476 }
1477 }
1478 if (pkt_is_rsc) {
1479 if (ring_is_ps_enabled(rx_ring))
1480 rx_ring->rx_stats.rsc_count +=
1481 skb_shinfo(skb)->nr_frags;
1482 else
1483 rx_ring->rx_stats.rsc_count +=
1484 IXGBE_RSC_CB(skb)->skb_cnt;
1485 rx_ring->rx_stats.rsc_flush++;
1486 }
1487
1488 /* ERR_MASK will only have valid bits if EOP set */
1489 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
1490 /* trim packet back to size 0 and recycle it */
1491 __pskb_trim(skb, 0);
1492 rx_buffer_info->skb = skb;
1493 goto next_desc;
1494 }
1495
1496 ixgbe_rx_checksum(adapter, rx_desc, skb);
1497 if (adapter->netdev->features & NETIF_F_RXHASH)
1498 ixgbe_rx_hash(rx_desc, skb);
1499
1500 /* probably a little skewed due to removing CRC */
1501 total_rx_bytes += skb->len;
1502 total_rx_packets++;
1503
1504 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
1505 #ifdef IXGBE_FCOE
1506 /* if ddp, not passing to ULD unless for FCP_RSP or error */
1507 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
1508 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
1509 if (!ddp_bytes)
1510 goto next_desc;
1511 }
1512 #endif /* IXGBE_FCOE */
1513 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
1514
1515 next_desc:
1516 rx_desc->wb.upper.status_error = 0;
1517
1518 (*work_done)++;
1519 if (*work_done >= work_to_do)
1520 break;
1521
1522 /* return some buffers to hardware, one at a time is too slow */
1523 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
1524 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1525 cleaned_count = 0;
1526 }
1527
1528 /* use prefetched values */
1529 rx_desc = next_rxd;
1530 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1531 }
1532
1533 rx_ring->next_to_clean = i;
1534 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
1535
1536 if (cleaned_count)
1537 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1538
1539 #ifdef IXGBE_FCOE
1540 /* include DDPed FCoE data */
1541 if (ddp_bytes > 0) {
1542 unsigned int mss;
1543
1544 mss = rx_ring->netdev->mtu - sizeof(struct fcoe_hdr) -
1545 sizeof(struct fc_frame_header) -
1546 sizeof(struct fcoe_crc_eof);
1547 if (mss > 512)
1548 mss &= ~511;
1549 total_rx_bytes += ddp_bytes;
1550 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
1551 }
1552 #endif /* IXGBE_FCOE */
1553
1554 rx_ring->total_packets += total_rx_packets;
1555 rx_ring->total_bytes += total_rx_bytes;
1556 u64_stats_update_begin(&rx_ring->syncp);
1557 rx_ring->stats.packets += total_rx_packets;
1558 rx_ring->stats.bytes += total_rx_bytes;
1559 u64_stats_update_end(&rx_ring->syncp);
1560 }
1561
1562 static int ixgbe_clean_rxonly(struct napi_struct *, int);
1563 /**
1564 * ixgbe_configure_msix - Configure MSI-X hardware
1565 * @adapter: board private structure
1566 *
1567 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
1568 * interrupts.
1569 **/
1570 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
1571 {
1572 struct ixgbe_q_vector *q_vector;
1573 int i, q_vectors, v_idx, r_idx;
1574 u32 mask;
1575
1576 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1577
1578 /*
1579 * Populate the IVAR table and set the ITR values to the
1580 * corresponding register.
1581 */
1582 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1583 q_vector = adapter->q_vector[v_idx];
1584 /* XXX for_each_set_bit(...) */
1585 r_idx = find_first_bit(q_vector->rxr_idx,
1586 adapter->num_rx_queues);
1587
1588 for (i = 0; i < q_vector->rxr_count; i++) {
1589 u8 reg_idx = adapter->rx_ring[r_idx]->reg_idx;
1590 ixgbe_set_ivar(adapter, 0, reg_idx, v_idx);
1591 r_idx = find_next_bit(q_vector->rxr_idx,
1592 adapter->num_rx_queues,
1593 r_idx + 1);
1594 }
1595 r_idx = find_first_bit(q_vector->txr_idx,
1596 adapter->num_tx_queues);
1597
1598 for (i = 0; i < q_vector->txr_count; i++) {
1599 u8 reg_idx = adapter->tx_ring[r_idx]->reg_idx;
1600 ixgbe_set_ivar(adapter, 1, reg_idx, v_idx);
1601 r_idx = find_next_bit(q_vector->txr_idx,
1602 adapter->num_tx_queues,
1603 r_idx + 1);
1604 }
1605
1606 if (q_vector->txr_count && !q_vector->rxr_count)
1607 /* tx only */
1608 q_vector->eitr = adapter->tx_eitr_param;
1609 else if (q_vector->rxr_count)
1610 /* rx or mixed */
1611 q_vector->eitr = adapter->rx_eitr_param;
1612
1613 ixgbe_write_eitr(q_vector);
1614 /* If Flow Director is enabled, set interrupt affinity */
1615 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
1616 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)) {
1617 /*
1618 * Allocate the affinity_hint cpumask, assign the mask
1619 * for this vector, and set our affinity_hint for
1620 * this irq.
1621 */
1622 if (!alloc_cpumask_var(&q_vector->affinity_mask,
1623 GFP_KERNEL))
1624 return;
1625 cpumask_set_cpu(v_idx, q_vector->affinity_mask);
1626 irq_set_affinity_hint(adapter->msix_entries[v_idx].vector,
1627 q_vector->affinity_mask);
1628 }
1629 }
1630
1631 switch (adapter->hw.mac.type) {
1632 case ixgbe_mac_82598EB:
1633 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
1634 v_idx);
1635 break;
1636 case ixgbe_mac_82599EB:
1637 case ixgbe_mac_X540:
1638 ixgbe_set_ivar(adapter, -1, 1, v_idx);
1639 break;
1640
1641 default:
1642 break;
1643 }
1644 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
1645
1646 /* set up to autoclear timer, and the vectors */
1647 mask = IXGBE_EIMS_ENABLE_MASK;
1648 if (adapter->num_vfs)
1649 mask &= ~(IXGBE_EIMS_OTHER |
1650 IXGBE_EIMS_MAILBOX |
1651 IXGBE_EIMS_LSC);
1652 else
1653 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
1654 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
1655 }
1656
1657 enum latency_range {
1658 lowest_latency = 0,
1659 low_latency = 1,
1660 bulk_latency = 2,
1661 latency_invalid = 255
1662 };
1663
1664 /**
1665 * ixgbe_update_itr - update the dynamic ITR value based on statistics
1666 * @adapter: pointer to adapter
1667 * @eitr: eitr setting (ints per sec) to give last timeslice
1668 * @itr_setting: current throttle rate in ints/second
1669 * @packets: the number of packets during this measurement interval
1670 * @bytes: the number of bytes during this measurement interval
1671 *
1672 * Stores a new ITR value based on packets and byte
1673 * counts during the last interrupt. The advantage of per interrupt
1674 * computation is faster updates and more accurate ITR for the current
1675 * traffic pattern. Constants in this function were computed
1676 * based on theoretical maximum wire speed and thresholds were set based
1677 * on testing data as well as attempting to minimize response time
1678 * while increasing bulk throughput.
1679 * this functionality is controlled by the InterruptThrottleRate module
1680 * parameter (see ixgbe_param.c)
1681 **/
1682 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
1683 u32 eitr, u8 itr_setting,
1684 int packets, int bytes)
1685 {
1686 unsigned int retval = itr_setting;
1687 u32 timepassed_us;
1688 u64 bytes_perint;
1689
1690 if (packets == 0)
1691 goto update_itr_done;
1692
1693
1694 /* simple throttlerate management
1695 * 0-20MB/s lowest (100000 ints/s)
1696 * 20-100MB/s low (20000 ints/s)
1697 * 100-1249MB/s bulk (8000 ints/s)
1698 */
1699 /* what was last interrupt timeslice? */
1700 timepassed_us = 1000000/eitr;
1701 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1702
1703 switch (itr_setting) {
1704 case lowest_latency:
1705 if (bytes_perint > adapter->eitr_low)
1706 retval = low_latency;
1707 break;
1708 case low_latency:
1709 if (bytes_perint > adapter->eitr_high)
1710 retval = bulk_latency;
1711 else if (bytes_perint <= adapter->eitr_low)
1712 retval = lowest_latency;
1713 break;
1714 case bulk_latency:
1715 if (bytes_perint <= adapter->eitr_high)
1716 retval = low_latency;
1717 break;
1718 }
1719
1720 update_itr_done:
1721 return retval;
1722 }
1723
1724 /**
1725 * ixgbe_write_eitr - write EITR register in hardware specific way
1726 * @q_vector: structure containing interrupt and ring information
1727 *
1728 * This function is made to be called by ethtool and by the driver
1729 * when it needs to update EITR registers at runtime. Hardware
1730 * specific quirks/differences are taken care of here.
1731 */
1732 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1733 {
1734 struct ixgbe_adapter *adapter = q_vector->adapter;
1735 struct ixgbe_hw *hw = &adapter->hw;
1736 int v_idx = q_vector->v_idx;
1737 u32 itr_reg = EITR_INTS_PER_SEC_TO_REG(q_vector->eitr);
1738
1739 switch (adapter->hw.mac.type) {
1740 case ixgbe_mac_82598EB:
1741 /* must write high and low 16 bits to reset counter */
1742 itr_reg |= (itr_reg << 16);
1743 break;
1744 case ixgbe_mac_82599EB:
1745 case ixgbe_mac_X540:
1746 /*
1747 * 82599 and X540 can support a value of zero, so allow it for
1748 * max interrupt rate, but there is an errata where it can
1749 * not be zero with RSC
1750 */
1751 if (itr_reg == 8 &&
1752 !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
1753 itr_reg = 0;
1754
1755 /*
1756 * set the WDIS bit to not clear the timer bits and cause an
1757 * immediate assertion of the interrupt
1758 */
1759 itr_reg |= IXGBE_EITR_CNT_WDIS;
1760 break;
1761 default:
1762 break;
1763 }
1764 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1765 }
1766
1767 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
1768 {
1769 struct ixgbe_adapter *adapter = q_vector->adapter;
1770 int i, r_idx;
1771 u32 new_itr;
1772 u8 current_itr, ret_itr;
1773
1774 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1775 for (i = 0; i < q_vector->txr_count; i++) {
1776 struct ixgbe_ring *tx_ring = adapter->tx_ring[r_idx];
1777 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1778 q_vector->tx_itr,
1779 tx_ring->total_packets,
1780 tx_ring->total_bytes);
1781 /* if the result for this queue would decrease interrupt
1782 * rate for this vector then use that result */
1783 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
1784 q_vector->tx_itr - 1 : ret_itr);
1785 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1786 r_idx + 1);
1787 }
1788
1789 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1790 for (i = 0; i < q_vector->rxr_count; i++) {
1791 struct ixgbe_ring *rx_ring = adapter->rx_ring[r_idx];
1792 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1793 q_vector->rx_itr,
1794 rx_ring->total_packets,
1795 rx_ring->total_bytes);
1796 /* if the result for this queue would decrease interrupt
1797 * rate for this vector then use that result */
1798 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
1799 q_vector->rx_itr - 1 : ret_itr);
1800 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1801 r_idx + 1);
1802 }
1803
1804 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1805
1806 switch (current_itr) {
1807 /* counts and packets in update_itr are dependent on these numbers */
1808 case lowest_latency:
1809 new_itr = 100000;
1810 break;
1811 case low_latency:
1812 new_itr = 20000; /* aka hwitr = ~200 */
1813 break;
1814 case bulk_latency:
1815 default:
1816 new_itr = 8000;
1817 break;
1818 }
1819
1820 if (new_itr != q_vector->eitr) {
1821 /* do an exponential smoothing */
1822 new_itr = ((q_vector->eitr * 9) + new_itr)/10;
1823
1824 /* save the algorithm value here, not the smoothed one */
1825 q_vector->eitr = new_itr;
1826
1827 ixgbe_write_eitr(q_vector);
1828 }
1829 }
1830
1831 /**
1832 * ixgbe_check_overtemp_subtask - check for over tempurature
1833 * @adapter: pointer to adapter
1834 **/
1835 static void ixgbe_check_overtemp_subtask(struct ixgbe_adapter *adapter)
1836 {
1837 struct ixgbe_hw *hw = &adapter->hw;
1838 u32 eicr = adapter->interrupt_event;
1839
1840 if (test_bit(__IXGBE_DOWN, &adapter->state))
1841 return;
1842
1843 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
1844 !(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_EVENT))
1845 return;
1846
1847 adapter->flags2 &= ~IXGBE_FLAG2_TEMP_SENSOR_EVENT;
1848
1849 switch (hw->device_id) {
1850 case IXGBE_DEV_ID_82599_T3_LOM:
1851 /*
1852 * Since the warning interrupt is for both ports
1853 * we don't have to check if:
1854 * - This interrupt wasn't for our port.
1855 * - We may have missed the interrupt so always have to
1856 * check if we got a LSC
1857 */
1858 if (!(eicr & IXGBE_EICR_GPI_SDP0) &&
1859 !(eicr & IXGBE_EICR_LSC))
1860 return;
1861
1862 if (!(eicr & IXGBE_EICR_LSC) && hw->mac.ops.check_link) {
1863 u32 autoneg;
1864 bool link_up = false;
1865
1866 hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
1867
1868 if (link_up)
1869 return;
1870 }
1871
1872 /* Check if this is not due to overtemp */
1873 if (hw->phy.ops.check_overtemp(hw) != IXGBE_ERR_OVERTEMP)
1874 return;
1875
1876 break;
1877 default:
1878 if (!(eicr & IXGBE_EICR_GPI_SDP0))
1879 return;
1880 break;
1881 }
1882 e_crit(drv,
1883 "Network adapter has been stopped because it has over heated. "
1884 "Restart the computer. If the problem persists, "
1885 "power off the system and replace the adapter\n");
1886
1887 adapter->interrupt_event = 0;
1888 }
1889
1890 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1891 {
1892 struct ixgbe_hw *hw = &adapter->hw;
1893
1894 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1895 (eicr & IXGBE_EICR_GPI_SDP1)) {
1896 e_crit(probe, "Fan has stopped, replace the adapter\n");
1897 /* write to clear the interrupt */
1898 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1899 }
1900 }
1901
1902 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1903 {
1904 struct ixgbe_hw *hw = &adapter->hw;
1905
1906 if (eicr & IXGBE_EICR_GPI_SDP2) {
1907 /* Clear the interrupt */
1908 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1909 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1910 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
1911 ixgbe_service_event_schedule(adapter);
1912 }
1913 }
1914
1915 if (eicr & IXGBE_EICR_GPI_SDP1) {
1916 /* Clear the interrupt */
1917 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1918 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1919 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
1920 ixgbe_service_event_schedule(adapter);
1921 }
1922 }
1923 }
1924
1925 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1926 {
1927 struct ixgbe_hw *hw = &adapter->hw;
1928
1929 adapter->lsc_int++;
1930 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1931 adapter->link_check_timeout = jiffies;
1932 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1933 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1934 IXGBE_WRITE_FLUSH(hw);
1935 ixgbe_service_event_schedule(adapter);
1936 }
1937 }
1938
1939 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1940 {
1941 struct net_device *netdev = data;
1942 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1943 struct ixgbe_hw *hw = &adapter->hw;
1944 u32 eicr;
1945
1946 /*
1947 * Workaround for Silicon errata. Use clear-by-write instead
1948 * of clear-by-read. Reading with EICS will return the
1949 * interrupt causes without clearing, which later be done
1950 * with the write to EICR.
1951 */
1952 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1953 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1954
1955 if (eicr & IXGBE_EICR_LSC)
1956 ixgbe_check_lsc(adapter);
1957
1958 if (eicr & IXGBE_EICR_MAILBOX)
1959 ixgbe_msg_task(adapter);
1960
1961 switch (hw->mac.type) {
1962 case ixgbe_mac_82599EB:
1963 case ixgbe_mac_X540:
1964 /* Handle Flow Director Full threshold interrupt */
1965 if (eicr & IXGBE_EICR_FLOW_DIR) {
1966 int reinit_count = 0;
1967 int i;
1968 for (i = 0; i < adapter->num_tx_queues; i++) {
1969 struct ixgbe_ring *ring = adapter->tx_ring[i];
1970 if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE,
1971 &ring->state))
1972 reinit_count++;
1973 }
1974 if (reinit_count) {
1975 /* no more flow director interrupts until after init */
1976 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_FLOW_DIR);
1977 eicr &= ~IXGBE_EICR_FLOW_DIR;
1978 adapter->flags2 |= IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
1979 ixgbe_service_event_schedule(adapter);
1980 }
1981 }
1982 ixgbe_check_sfp_event(adapter, eicr);
1983 if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
1984 ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC))) {
1985 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1986 adapter->interrupt_event = eicr;
1987 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
1988 ixgbe_service_event_schedule(adapter);
1989 }
1990 }
1991 break;
1992 default:
1993 break;
1994 }
1995
1996 ixgbe_check_fan_failure(adapter, eicr);
1997
1998 /* re-enable the original interrupt state, no lsc, no queues */
1999 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2000 IXGBE_WRITE_REG(hw, IXGBE_EIMS, eicr &
2001 ~(IXGBE_EIMS_LSC | IXGBE_EIMS_RTX_QUEUE));
2002
2003 return IRQ_HANDLED;
2004 }
2005
2006 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
2007 u64 qmask)
2008 {
2009 u32 mask;
2010 struct ixgbe_hw *hw = &adapter->hw;
2011
2012 switch (hw->mac.type) {
2013 case ixgbe_mac_82598EB:
2014 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
2015 IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
2016 break;
2017 case ixgbe_mac_82599EB:
2018 case ixgbe_mac_X540:
2019 mask = (qmask & 0xFFFFFFFF);
2020 if (mask)
2021 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
2022 mask = (qmask >> 32);
2023 if (mask)
2024 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
2025 break;
2026 default:
2027 break;
2028 }
2029 /* skip the flush */
2030 }
2031
2032 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
2033 u64 qmask)
2034 {
2035 u32 mask;
2036 struct ixgbe_hw *hw = &adapter->hw;
2037
2038 switch (hw->mac.type) {
2039 case ixgbe_mac_82598EB:
2040 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
2041 IXGBE_WRITE_REG(hw, IXGBE_EIMC, mask);
2042 break;
2043 case ixgbe_mac_82599EB:
2044 case ixgbe_mac_X540:
2045 mask = (qmask & 0xFFFFFFFF);
2046 if (mask)
2047 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(0), mask);
2048 mask = (qmask >> 32);
2049 if (mask)
2050 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(1), mask);
2051 break;
2052 default:
2053 break;
2054 }
2055 /* skip the flush */
2056 }
2057
2058 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
2059 {
2060 struct ixgbe_q_vector *q_vector = data;
2061 struct ixgbe_adapter *adapter = q_vector->adapter;
2062 struct ixgbe_ring *tx_ring;
2063 int i, r_idx;
2064
2065 if (!q_vector->txr_count)
2066 return IRQ_HANDLED;
2067
2068 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
2069 for (i = 0; i < q_vector->txr_count; i++) {
2070 tx_ring = adapter->tx_ring[r_idx];
2071 tx_ring->total_bytes = 0;
2072 tx_ring->total_packets = 0;
2073 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
2074 r_idx + 1);
2075 }
2076
2077 /* EIAM disabled interrupts (on this vector) for us */
2078 napi_schedule(&q_vector->napi);
2079
2080 return IRQ_HANDLED;
2081 }
2082
2083 /**
2084 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
2085 * @irq: unused
2086 * @data: pointer to our q_vector struct for this interrupt vector
2087 **/
2088 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
2089 {
2090 struct ixgbe_q_vector *q_vector = data;
2091 struct ixgbe_adapter *adapter = q_vector->adapter;
2092 struct ixgbe_ring *rx_ring;
2093 int r_idx;
2094 int i;
2095
2096 #ifdef CONFIG_IXGBE_DCA
2097 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2098 ixgbe_update_dca(q_vector);
2099 #endif
2100
2101 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
2102 for (i = 0; i < q_vector->rxr_count; i++) {
2103 rx_ring = adapter->rx_ring[r_idx];
2104 rx_ring->total_bytes = 0;
2105 rx_ring->total_packets = 0;
2106 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
2107 r_idx + 1);
2108 }
2109
2110 if (!q_vector->rxr_count)
2111 return IRQ_HANDLED;
2112
2113 /* EIAM disabled interrupts (on this vector) for us */
2114 napi_schedule(&q_vector->napi);
2115
2116 return IRQ_HANDLED;
2117 }
2118
2119 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
2120 {
2121 struct ixgbe_q_vector *q_vector = data;
2122 struct ixgbe_adapter *adapter = q_vector->adapter;
2123 struct ixgbe_ring *ring;
2124 int r_idx;
2125 int i;
2126
2127 if (!q_vector->txr_count && !q_vector->rxr_count)
2128 return IRQ_HANDLED;
2129
2130 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
2131 for (i = 0; i < q_vector->txr_count; i++) {
2132 ring = adapter->tx_ring[r_idx];
2133 ring->total_bytes = 0;
2134 ring->total_packets = 0;
2135 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
2136 r_idx + 1);
2137 }
2138
2139 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
2140 for (i = 0; i < q_vector->rxr_count; i++) {
2141 ring = adapter->rx_ring[r_idx];
2142 ring->total_bytes = 0;
2143 ring->total_packets = 0;
2144 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
2145 r_idx + 1);
2146 }
2147
2148 /* EIAM disabled interrupts (on this vector) for us */
2149 napi_schedule(&q_vector->napi);
2150
2151 return IRQ_HANDLED;
2152 }
2153
2154 /**
2155 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
2156 * @napi: napi struct with our devices info in it
2157 * @budget: amount of work driver is allowed to do this pass, in packets
2158 *
2159 * This function is optimized for cleaning one queue only on a single
2160 * q_vector!!!
2161 **/
2162 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
2163 {
2164 struct ixgbe_q_vector *q_vector =
2165 container_of(napi, struct ixgbe_q_vector, napi);
2166 struct ixgbe_adapter *adapter = q_vector->adapter;
2167 struct ixgbe_ring *rx_ring = NULL;
2168 int work_done = 0;
2169 long r_idx;
2170
2171 #ifdef CONFIG_IXGBE_DCA
2172 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2173 ixgbe_update_dca(q_vector);
2174 #endif
2175
2176 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
2177 rx_ring = adapter->rx_ring[r_idx];
2178
2179 ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
2180
2181 /* If all Rx work done, exit the polling mode */
2182 if (work_done < budget) {
2183 napi_complete(napi);
2184 if (adapter->rx_itr_setting & 1)
2185 ixgbe_set_itr_msix(q_vector);
2186 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2187 ixgbe_irq_enable_queues(adapter,
2188 ((u64)1 << q_vector->v_idx));
2189 }
2190
2191 return work_done;
2192 }
2193
2194 /**
2195 * ixgbe_clean_rxtx_many - msix (aka one shot) rx clean routine
2196 * @napi: napi struct with our devices info in it
2197 * @budget: amount of work driver is allowed to do this pass, in packets
2198 *
2199 * This function will clean more than one rx queue associated with a
2200 * q_vector.
2201 **/
2202 static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
2203 {
2204 struct ixgbe_q_vector *q_vector =
2205 container_of(napi, struct ixgbe_q_vector, napi);
2206 struct ixgbe_adapter *adapter = q_vector->adapter;
2207 struct ixgbe_ring *ring = NULL;
2208 int work_done = 0, i;
2209 long r_idx;
2210 bool tx_clean_complete = true;
2211
2212 #ifdef CONFIG_IXGBE_DCA
2213 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2214 ixgbe_update_dca(q_vector);
2215 #endif
2216
2217 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
2218 for (i = 0; i < q_vector->txr_count; i++) {
2219 ring = adapter->tx_ring[r_idx];
2220 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
2221 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
2222 r_idx + 1);
2223 }
2224
2225 /* attempt to distribute budget to each queue fairly, but don't allow
2226 * the budget to go below 1 because we'll exit polling */
2227 budget /= (q_vector->rxr_count ?: 1);
2228 budget = max(budget, 1);
2229 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
2230 for (i = 0; i < q_vector->rxr_count; i++) {
2231 ring = adapter->rx_ring[r_idx];
2232 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
2233 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
2234 r_idx + 1);
2235 }
2236
2237 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
2238 ring = adapter->rx_ring[r_idx];
2239 /* If all Rx work done, exit the polling mode */
2240 if (work_done < budget) {
2241 napi_complete(napi);
2242 if (adapter->rx_itr_setting & 1)
2243 ixgbe_set_itr_msix(q_vector);
2244 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2245 ixgbe_irq_enable_queues(adapter,
2246 ((u64)1 << q_vector->v_idx));
2247 return 0;
2248 }
2249
2250 return work_done;
2251 }
2252
2253 /**
2254 * ixgbe_clean_txonly - msix (aka one shot) tx clean routine
2255 * @napi: napi struct with our devices info in it
2256 * @budget: amount of work driver is allowed to do this pass, in packets
2257 *
2258 * This function is optimized for cleaning one queue only on a single
2259 * q_vector!!!
2260 **/
2261 static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
2262 {
2263 struct ixgbe_q_vector *q_vector =
2264 container_of(napi, struct ixgbe_q_vector, napi);
2265 struct ixgbe_adapter *adapter = q_vector->adapter;
2266 struct ixgbe_ring *tx_ring = NULL;
2267 int work_done = 0;
2268 long r_idx;
2269
2270 #ifdef CONFIG_IXGBE_DCA
2271 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2272 ixgbe_update_dca(q_vector);
2273 #endif
2274
2275 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
2276 tx_ring = adapter->tx_ring[r_idx];
2277
2278 if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
2279 work_done = budget;
2280
2281 /* If all Tx work done, exit the polling mode */
2282 if (work_done < budget) {
2283 napi_complete(napi);
2284 if (adapter->tx_itr_setting & 1)
2285 ixgbe_set_itr_msix(q_vector);
2286 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2287 ixgbe_irq_enable_queues(adapter,
2288 ((u64)1 << q_vector->v_idx));
2289 }
2290
2291 return work_done;
2292 }
2293
2294 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
2295 int r_idx)
2296 {
2297 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2298 struct ixgbe_ring *rx_ring = a->rx_ring[r_idx];
2299
2300 set_bit(r_idx, q_vector->rxr_idx);
2301 q_vector->rxr_count++;
2302 rx_ring->q_vector = q_vector;
2303 }
2304
2305 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
2306 int t_idx)
2307 {
2308 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2309 struct ixgbe_ring *tx_ring = a->tx_ring[t_idx];
2310
2311 set_bit(t_idx, q_vector->txr_idx);
2312 q_vector->txr_count++;
2313 tx_ring->q_vector = q_vector;
2314 }
2315
2316 /**
2317 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
2318 * @adapter: board private structure to initialize
2319 *
2320 * This function maps descriptor rings to the queue-specific vectors
2321 * we were allotted through the MSI-X enabling code. Ideally, we'd have
2322 * one vector per ring/queue, but on a constrained vector budget, we
2323 * group the rings as "efficiently" as possible. You would add new
2324 * mapping configurations in here.
2325 **/
2326 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter)
2327 {
2328 int q_vectors;
2329 int v_start = 0;
2330 int rxr_idx = 0, txr_idx = 0;
2331 int rxr_remaining = adapter->num_rx_queues;
2332 int txr_remaining = adapter->num_tx_queues;
2333 int i, j;
2334 int rqpv, tqpv;
2335 int err = 0;
2336
2337 /* No mapping required if MSI-X is disabled. */
2338 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2339 goto out;
2340
2341 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2342
2343 /*
2344 * The ideal configuration...
2345 * We have enough vectors to map one per queue.
2346 */
2347 if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
2348 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
2349 map_vector_to_rxq(adapter, v_start, rxr_idx);
2350
2351 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
2352 map_vector_to_txq(adapter, v_start, txr_idx);
2353
2354 goto out;
2355 }
2356
2357 /*
2358 * If we don't have enough vectors for a 1-to-1
2359 * mapping, we'll have to group them so there are
2360 * multiple queues per vector.
2361 */
2362 /* Re-adjusting *qpv takes care of the remainder. */
2363 for (i = v_start; i < q_vectors; i++) {
2364 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
2365 for (j = 0; j < rqpv; j++) {
2366 map_vector_to_rxq(adapter, i, rxr_idx);
2367 rxr_idx++;
2368 rxr_remaining--;
2369 }
2370 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
2371 for (j = 0; j < tqpv; j++) {
2372 map_vector_to_txq(adapter, i, txr_idx);
2373 txr_idx++;
2374 txr_remaining--;
2375 }
2376 }
2377 out:
2378 return err;
2379 }
2380
2381 /**
2382 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2383 * @adapter: board private structure
2384 *
2385 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2386 * interrupts from the kernel.
2387 **/
2388 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2389 {
2390 struct net_device *netdev = adapter->netdev;
2391 irqreturn_t (*handler)(int, void *);
2392 int i, vector, q_vectors, err;
2393 int ri = 0, ti = 0;
2394
2395 /* Decrement for Other and TCP Timer vectors */
2396 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2397
2398 err = ixgbe_map_rings_to_vectors(adapter);
2399 if (err)
2400 return err;
2401
2402 #define SET_HANDLER(_v) (((_v)->rxr_count && (_v)->txr_count) \
2403 ? &ixgbe_msix_clean_many : \
2404 (_v)->rxr_count ? &ixgbe_msix_clean_rx : \
2405 (_v)->txr_count ? &ixgbe_msix_clean_tx : \
2406 NULL)
2407 for (vector = 0; vector < q_vectors; vector++) {
2408 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
2409 handler = SET_HANDLER(q_vector);
2410
2411 if (handler == &ixgbe_msix_clean_rx) {
2412 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2413 "%s-%s-%d", netdev->name, "rx", ri++);
2414 } else if (handler == &ixgbe_msix_clean_tx) {
2415 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2416 "%s-%s-%d", netdev->name, "tx", ti++);
2417 } else if (handler == &ixgbe_msix_clean_many) {
2418 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2419 "%s-%s-%d", netdev->name, "TxRx", ri++);
2420 ti++;
2421 } else {
2422 /* skip this unused q_vector */
2423 continue;
2424 }
2425 err = request_irq(adapter->msix_entries[vector].vector,
2426 handler, 0, q_vector->name,
2427 q_vector);
2428 if (err) {
2429 e_err(probe, "request_irq failed for MSIX interrupt "
2430 "Error: %d\n", err);
2431 goto free_queue_irqs;
2432 }
2433 }
2434
2435 sprintf(adapter->lsc_int_name, "%s:lsc", netdev->name);
2436 err = request_irq(adapter->msix_entries[vector].vector,
2437 ixgbe_msix_lsc, 0, adapter->lsc_int_name, netdev);
2438 if (err) {
2439 e_err(probe, "request_irq for msix_lsc failed: %d\n", err);
2440 goto free_queue_irqs;
2441 }
2442
2443 return 0;
2444
2445 free_queue_irqs:
2446 for (i = vector - 1; i >= 0; i--)
2447 free_irq(adapter->msix_entries[--vector].vector,
2448 adapter->q_vector[i]);
2449 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2450 pci_disable_msix(adapter->pdev);
2451 kfree(adapter->msix_entries);
2452 adapter->msix_entries = NULL;
2453 return err;
2454 }
2455
2456 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
2457 {
2458 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2459 struct ixgbe_ring *rx_ring = adapter->rx_ring[0];
2460 struct ixgbe_ring *tx_ring = adapter->tx_ring[0];
2461 u32 new_itr = q_vector->eitr;
2462 u8 current_itr;
2463
2464 q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
2465 q_vector->tx_itr,
2466 tx_ring->total_packets,
2467 tx_ring->total_bytes);
2468 q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
2469 q_vector->rx_itr,
2470 rx_ring->total_packets,
2471 rx_ring->total_bytes);
2472
2473 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
2474
2475 switch (current_itr) {
2476 /* counts and packets in update_itr are dependent on these numbers */
2477 case lowest_latency:
2478 new_itr = 100000;
2479 break;
2480 case low_latency:
2481 new_itr = 20000; /* aka hwitr = ~200 */
2482 break;
2483 case bulk_latency:
2484 new_itr = 8000;
2485 break;
2486 default:
2487 break;
2488 }
2489
2490 if (new_itr != q_vector->eitr) {
2491 /* do an exponential smoothing */
2492 new_itr = ((q_vector->eitr * 9) + new_itr)/10;
2493
2494 /* save the algorithm value here */
2495 q_vector->eitr = new_itr;
2496
2497 ixgbe_write_eitr(q_vector);
2498 }
2499 }
2500
2501 /**
2502 * ixgbe_irq_enable - Enable default interrupt generation settings
2503 * @adapter: board private structure
2504 **/
2505 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
2506 bool flush)
2507 {
2508 u32 mask;
2509
2510 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
2511 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
2512 mask |= IXGBE_EIMS_GPI_SDP0;
2513 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
2514 mask |= IXGBE_EIMS_GPI_SDP1;
2515 switch (adapter->hw.mac.type) {
2516 case ixgbe_mac_82599EB:
2517 case ixgbe_mac_X540:
2518 mask |= IXGBE_EIMS_ECC;
2519 mask |= IXGBE_EIMS_GPI_SDP1;
2520 mask |= IXGBE_EIMS_GPI_SDP2;
2521 if (adapter->num_vfs)
2522 mask |= IXGBE_EIMS_MAILBOX;
2523 break;
2524 default:
2525 break;
2526 }
2527 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
2528 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
2529 mask |= IXGBE_EIMS_FLOW_DIR;
2530
2531 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
2532 if (queues)
2533 ixgbe_irq_enable_queues(adapter, ~0);
2534 if (flush)
2535 IXGBE_WRITE_FLUSH(&adapter->hw);
2536
2537 if (adapter->num_vfs > 32) {
2538 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
2539 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
2540 }
2541 }
2542
2543 /**
2544 * ixgbe_intr - legacy mode Interrupt Handler
2545 * @irq: interrupt number
2546 * @data: pointer to a network interface device structure
2547 **/
2548 static irqreturn_t ixgbe_intr(int irq, void *data)
2549 {
2550 struct net_device *netdev = data;
2551 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2552 struct ixgbe_hw *hw = &adapter->hw;
2553 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2554 u32 eicr;
2555
2556 /*
2557 * Workaround for silicon errata on 82598. Mask the interrupts
2558 * before the read of EICR.
2559 */
2560 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2561
2562 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2563 * therefore no explict interrupt disable is necessary */
2564 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2565 if (!eicr) {
2566 /*
2567 * shared interrupt alert!
2568 * make sure interrupts are enabled because the read will
2569 * have disabled interrupts due to EIAM
2570 * finish the workaround of silicon errata on 82598. Unmask
2571 * the interrupt that we masked before the EICR read.
2572 */
2573 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2574 ixgbe_irq_enable(adapter, true, true);
2575 return IRQ_NONE; /* Not our interrupt */
2576 }
2577
2578 if (eicr & IXGBE_EICR_LSC)
2579 ixgbe_check_lsc(adapter);
2580
2581 switch (hw->mac.type) {
2582 case ixgbe_mac_82599EB:
2583 ixgbe_check_sfp_event(adapter, eicr);
2584 if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
2585 ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC))) {
2586 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2587 adapter->interrupt_event = eicr;
2588 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2589 ixgbe_service_event_schedule(adapter);
2590 }
2591 }
2592 break;
2593 default:
2594 break;
2595 }
2596
2597 ixgbe_check_fan_failure(adapter, eicr);
2598
2599 if (napi_schedule_prep(&(q_vector->napi))) {
2600 adapter->tx_ring[0]->total_packets = 0;
2601 adapter->tx_ring[0]->total_bytes = 0;
2602 adapter->rx_ring[0]->total_packets = 0;
2603 adapter->rx_ring[0]->total_bytes = 0;
2604 /* would disable interrupts here but EIAM disabled it */
2605 __napi_schedule(&(q_vector->napi));
2606 }
2607
2608 /*
2609 * re-enable link(maybe) and non-queue interrupts, no flush.
2610 * ixgbe_poll will re-enable the queue interrupts
2611 */
2612
2613 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2614 ixgbe_irq_enable(adapter, false, false);
2615
2616 return IRQ_HANDLED;
2617 }
2618
2619 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
2620 {
2621 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2622
2623 for (i = 0; i < q_vectors; i++) {
2624 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
2625 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
2626 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
2627 q_vector->rxr_count = 0;
2628 q_vector->txr_count = 0;
2629 }
2630 }
2631
2632 /**
2633 * ixgbe_request_irq - initialize interrupts
2634 * @adapter: board private structure
2635 *
2636 * Attempts to configure interrupts using the best available
2637 * capabilities of the hardware and kernel.
2638 **/
2639 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
2640 {
2641 struct net_device *netdev = adapter->netdev;
2642 int err;
2643
2644 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2645 err = ixgbe_request_msix_irqs(adapter);
2646 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
2647 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
2648 netdev->name, netdev);
2649 } else {
2650 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
2651 netdev->name, netdev);
2652 }
2653
2654 if (err)
2655 e_err(probe, "request_irq failed, Error %d\n", err);
2656
2657 return err;
2658 }
2659
2660 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
2661 {
2662 struct net_device *netdev = adapter->netdev;
2663
2664 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2665 int i, q_vectors;
2666
2667 q_vectors = adapter->num_msix_vectors;
2668
2669 i = q_vectors - 1;
2670 free_irq(adapter->msix_entries[i].vector, netdev);
2671
2672 i--;
2673 for (; i >= 0; i--) {
2674 /* free only the irqs that were actually requested */
2675 if (!adapter->q_vector[i]->rxr_count &&
2676 !adapter->q_vector[i]->txr_count)
2677 continue;
2678
2679 free_irq(adapter->msix_entries[i].vector,
2680 adapter->q_vector[i]);
2681 }
2682
2683 ixgbe_reset_q_vectors(adapter);
2684 } else {
2685 free_irq(adapter->pdev->irq, netdev);
2686 }
2687 }
2688
2689 /**
2690 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
2691 * @adapter: board private structure
2692 **/
2693 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
2694 {
2695 switch (adapter->hw.mac.type) {
2696 case ixgbe_mac_82598EB:
2697 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
2698 break;
2699 case ixgbe_mac_82599EB:
2700 case ixgbe_mac_X540:
2701 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
2702 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
2703 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
2704 if (adapter->num_vfs > 32)
2705 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
2706 break;
2707 default:
2708 break;
2709 }
2710 IXGBE_WRITE_FLUSH(&adapter->hw);
2711 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2712 int i;
2713 for (i = 0; i < adapter->num_msix_vectors; i++)
2714 synchronize_irq(adapter->msix_entries[i].vector);
2715 } else {
2716 synchronize_irq(adapter->pdev->irq);
2717 }
2718 }
2719
2720 /**
2721 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
2722 *
2723 **/
2724 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
2725 {
2726 struct ixgbe_hw *hw = &adapter->hw;
2727
2728 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
2729 EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr_param));
2730
2731 ixgbe_set_ivar(adapter, 0, 0, 0);
2732 ixgbe_set_ivar(adapter, 1, 0, 0);
2733
2734 map_vector_to_rxq(adapter, 0, 0);
2735 map_vector_to_txq(adapter, 0, 0);
2736
2737 e_info(hw, "Legacy interrupt IVAR setup done\n");
2738 }
2739
2740 /**
2741 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
2742 * @adapter: board private structure
2743 * @ring: structure containing ring specific data
2744 *
2745 * Configure the Tx descriptor ring after a reset.
2746 **/
2747 void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
2748 struct ixgbe_ring *ring)
2749 {
2750 struct ixgbe_hw *hw = &adapter->hw;
2751 u64 tdba = ring->dma;
2752 int wait_loop = 10;
2753 u32 txdctl;
2754 u8 reg_idx = ring->reg_idx;
2755
2756 /* disable queue to avoid issues while updating state */
2757 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2758 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx),
2759 txdctl & ~IXGBE_TXDCTL_ENABLE);
2760 IXGBE_WRITE_FLUSH(hw);
2761
2762 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
2763 (tdba & DMA_BIT_MASK(32)));
2764 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
2765 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
2766 ring->count * sizeof(union ixgbe_adv_tx_desc));
2767 IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
2768 IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
2769 ring->tail = hw->hw_addr + IXGBE_TDT(reg_idx);
2770
2771 /* configure fetching thresholds */
2772 if (adapter->rx_itr_setting == 0) {
2773 /* cannot set wthresh when itr==0 */
2774 txdctl &= ~0x007F0000;
2775 } else {
2776 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
2777 txdctl |= (8 << 16);
2778 }
2779 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2780 /* PThresh workaround for Tx hang with DFP enabled. */
2781 txdctl |= 32;
2782 }
2783
2784 /* reinitialize flowdirector state */
2785 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
2786 adapter->atr_sample_rate) {
2787 ring->atr_sample_rate = adapter->atr_sample_rate;
2788 ring->atr_count = 0;
2789 set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state);
2790 } else {
2791 ring->atr_sample_rate = 0;
2792 }
2793
2794 clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state);
2795
2796 /* enable queue */
2797 txdctl |= IXGBE_TXDCTL_ENABLE;
2798 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
2799
2800 /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2801 if (hw->mac.type == ixgbe_mac_82598EB &&
2802 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2803 return;
2804
2805 /* poll to verify queue is enabled */
2806 do {
2807 usleep_range(1000, 2000);
2808 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2809 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
2810 if (!wait_loop)
2811 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx);
2812 }
2813
2814 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
2815 {
2816 struct ixgbe_hw *hw = &adapter->hw;
2817 u32 rttdcs;
2818 u32 reg;
2819 u8 tcs = netdev_get_num_tc(adapter->netdev);
2820
2821 if (hw->mac.type == ixgbe_mac_82598EB)
2822 return;
2823
2824 /* disable the arbiter while setting MTQC */
2825 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
2826 rttdcs |= IXGBE_RTTDCS_ARBDIS;
2827 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2828
2829 /* set transmit pool layout */
2830 switch (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
2831 case (IXGBE_FLAG_SRIOV_ENABLED):
2832 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2833 (IXGBE_MTQC_VT_ENA | IXGBE_MTQC_64VF));
2834 break;
2835 default:
2836 if (!tcs)
2837 reg = IXGBE_MTQC_64Q_1PB;
2838 else if (tcs <= 4)
2839 reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
2840 else
2841 reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
2842
2843 IXGBE_WRITE_REG(hw, IXGBE_MTQC, reg);
2844
2845 /* Enable Security TX Buffer IFG for multiple pb */
2846 if (tcs) {
2847 reg = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);
2848 reg |= IXGBE_SECTX_DCB;
2849 IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, reg);
2850 }
2851 break;
2852 }
2853
2854 /* re-enable the arbiter */
2855 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
2856 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2857 }
2858
2859 /**
2860 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
2861 * @adapter: board private structure
2862 *
2863 * Configure the Tx unit of the MAC after a reset.
2864 **/
2865 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
2866 {
2867 struct ixgbe_hw *hw = &adapter->hw;
2868 u32 dmatxctl;
2869 u32 i;
2870
2871 ixgbe_setup_mtqc(adapter);
2872
2873 if (hw->mac.type != ixgbe_mac_82598EB) {
2874 /* DMATXCTL.EN must be before Tx queues are enabled */
2875 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2876 dmatxctl |= IXGBE_DMATXCTL_TE;
2877 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2878 }
2879
2880 /* Setup the HW Tx Head and Tail descriptor pointers */
2881 for (i = 0; i < adapter->num_tx_queues; i++)
2882 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
2883 }
2884
2885 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
2886
2887 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
2888 struct ixgbe_ring *rx_ring)
2889 {
2890 u32 srrctl;
2891 u8 reg_idx = rx_ring->reg_idx;
2892
2893 switch (adapter->hw.mac.type) {
2894 case ixgbe_mac_82598EB: {
2895 struct ixgbe_ring_feature *feature = adapter->ring_feature;
2896 const int mask = feature[RING_F_RSS].mask;
2897 reg_idx = reg_idx & mask;
2898 }
2899 break;
2900 case ixgbe_mac_82599EB:
2901 case ixgbe_mac_X540:
2902 default:
2903 break;
2904 }
2905
2906 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(reg_idx));
2907
2908 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
2909 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
2910 if (adapter->num_vfs)
2911 srrctl |= IXGBE_SRRCTL_DROP_EN;
2912
2913 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
2914 IXGBE_SRRCTL_BSIZEHDR_MASK;
2915
2916 if (ring_is_ps_enabled(rx_ring)) {
2917 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
2918 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2919 #else
2920 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2921 #endif
2922 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
2923 } else {
2924 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
2925 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2926 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
2927 }
2928
2929 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(reg_idx), srrctl);
2930 }
2931
2932 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
2933 {
2934 struct ixgbe_hw *hw = &adapter->hw;
2935 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2936 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2937 0x6A3E67EA, 0x14364D17, 0x3BED200D};
2938 u32 mrqc = 0, reta = 0;
2939 u32 rxcsum;
2940 int i, j;
2941 u8 tcs = netdev_get_num_tc(adapter->netdev);
2942
2943 /* Fill out hash function seeds */
2944 for (i = 0; i < 10; i++)
2945 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2946
2947 /* Fill out redirection table */
2948 for (i = 0, j = 0; i < 128; i++, j++) {
2949 if (j == adapter->ring_feature[RING_F_RSS].indices)
2950 j = 0;
2951 /* reta = 4-byte sliding window of
2952 * 0x00..(indices-1)(indices-1)00..etc. */
2953 reta = (reta << 8) | (j * 0x11);
2954 if ((i & 3) == 3)
2955 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2956 }
2957
2958 /* Disable indicating checksum in descriptor, enables RSS hash */
2959 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2960 rxcsum |= IXGBE_RXCSUM_PCSD;
2961 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2962
2963 if (adapter->hw.mac.type == ixgbe_mac_82598EB &&
2964 (adapter->flags & IXGBE_FLAG_RSS_ENABLED)) {
2965 mrqc = IXGBE_MRQC_RSSEN;
2966 } else {
2967 int mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
2968 | IXGBE_FLAG_SRIOV_ENABLED);
2969
2970 switch (mask) {
2971 case (IXGBE_FLAG_RSS_ENABLED):
2972 if (!tcs)
2973 mrqc = IXGBE_MRQC_RSSEN;
2974 else if (tcs <= 4)
2975 mrqc = IXGBE_MRQC_RTRSS4TCEN;
2976 else
2977 mrqc = IXGBE_MRQC_RTRSS8TCEN;
2978 break;
2979 case (IXGBE_FLAG_SRIOV_ENABLED):
2980 mrqc = IXGBE_MRQC_VMDQEN;
2981 break;
2982 default:
2983 break;
2984 }
2985 }
2986
2987 /* Perform hash on these packet types */
2988 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2989 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2990 | IXGBE_MRQC_RSS_FIELD_IPV6
2991 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
2992
2993 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2994 }
2995
2996 /**
2997 * ixgbe_clear_rscctl - disable RSC for the indicated ring
2998 * @adapter: address of board private structure
2999 * @ring: structure containing ring specific data
3000 **/
3001 void ixgbe_clear_rscctl(struct ixgbe_adapter *adapter,
3002 struct ixgbe_ring *ring)
3003 {
3004 struct ixgbe_hw *hw = &adapter->hw;
3005 u32 rscctrl;
3006 u8 reg_idx = ring->reg_idx;
3007
3008 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
3009 rscctrl &= ~IXGBE_RSCCTL_RSCEN;
3010 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
3011 }
3012
3013 /**
3014 * ixgbe_configure_rscctl - enable RSC for the indicated ring
3015 * @adapter: address of board private structure
3016 * @index: index of ring to set
3017 **/
3018 void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
3019 struct ixgbe_ring *ring)
3020 {
3021 struct ixgbe_hw *hw = &adapter->hw;
3022 u32 rscctrl;
3023 int rx_buf_len;
3024 u8 reg_idx = ring->reg_idx;
3025
3026 if (!ring_is_rsc_enabled(ring))
3027 return;
3028
3029 rx_buf_len = ring->rx_buf_len;
3030 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
3031 rscctrl |= IXGBE_RSCCTL_RSCEN;
3032 /*
3033 * we must limit the number of descriptors so that the
3034 * total size of max desc * buf_len is not greater
3035 * than 65535
3036 */
3037 if (ring_is_ps_enabled(ring)) {
3038 #if (MAX_SKB_FRAGS > 16)
3039 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
3040 #elif (MAX_SKB_FRAGS > 8)
3041 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
3042 #elif (MAX_SKB_FRAGS > 4)
3043 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
3044 #else
3045 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
3046 #endif
3047 } else {
3048 if (rx_buf_len < IXGBE_RXBUFFER_4096)
3049 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
3050 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
3051 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
3052 else
3053 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
3054 }
3055 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
3056 }
3057
3058 /**
3059 * ixgbe_set_uta - Set unicast filter table address
3060 * @adapter: board private structure
3061 *
3062 * The unicast table address is a register array of 32-bit registers.
3063 * The table is meant to be used in a way similar to how the MTA is used
3064 * however due to certain limitations in the hardware it is necessary to
3065 * set all the hash bits to 1 and use the VMOLR ROPE bit as a promiscuous
3066 * enable bit to allow vlan tag stripping when promiscuous mode is enabled
3067 **/
3068 static void ixgbe_set_uta(struct ixgbe_adapter *adapter)
3069 {
3070 struct ixgbe_hw *hw = &adapter->hw;
3071 int i;
3072
3073 /* The UTA table only exists on 82599 hardware and newer */
3074 if (hw->mac.type < ixgbe_mac_82599EB)
3075 return;
3076
3077 /* we only need to do this if VMDq is enabled */
3078 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
3079 return;
3080
3081 for (i = 0; i < 128; i++)
3082 IXGBE_WRITE_REG(hw, IXGBE_UTA(i), ~0);
3083 }
3084
3085 #define IXGBE_MAX_RX_DESC_POLL 10
3086 static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
3087 struct ixgbe_ring *ring)
3088 {
3089 struct ixgbe_hw *hw = &adapter->hw;
3090 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3091 u32 rxdctl;
3092 u8 reg_idx = ring->reg_idx;
3093
3094 /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
3095 if (hw->mac.type == ixgbe_mac_82598EB &&
3096 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3097 return;
3098
3099 do {
3100 usleep_range(1000, 2000);
3101 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3102 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
3103
3104 if (!wait_loop) {
3105 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
3106 "the polling period\n", reg_idx);
3107 }
3108 }
3109
3110 void ixgbe_disable_rx_queue(struct ixgbe_adapter *adapter,
3111 struct ixgbe_ring *ring)
3112 {
3113 struct ixgbe_hw *hw = &adapter->hw;
3114 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3115 u32 rxdctl;
3116 u8 reg_idx = ring->reg_idx;
3117
3118 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3119 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
3120
3121 /* write value back with RXDCTL.ENABLE bit cleared */
3122 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3123
3124 if (hw->mac.type == ixgbe_mac_82598EB &&
3125 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3126 return;
3127
3128 /* the hardware may take up to 100us to really disable the rx queue */
3129 do {
3130 udelay(10);
3131 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3132 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
3133
3134 if (!wait_loop) {
3135 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not cleared within "
3136 "the polling period\n", reg_idx);
3137 }
3138 }
3139
3140 void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
3141 struct ixgbe_ring *ring)
3142 {
3143 struct ixgbe_hw *hw = &adapter->hw;
3144 u64 rdba = ring->dma;
3145 u32 rxdctl;
3146 u8 reg_idx = ring->reg_idx;
3147
3148 /* disable queue to avoid issues while updating state */
3149 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3150 ixgbe_disable_rx_queue(adapter, ring);
3151
3152 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
3153 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
3154 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
3155 ring->count * sizeof(union ixgbe_adv_rx_desc));
3156 IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
3157 IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
3158 ring->tail = hw->hw_addr + IXGBE_RDT(reg_idx);
3159
3160 ixgbe_configure_srrctl(adapter, ring);
3161 ixgbe_configure_rscctl(adapter, ring);
3162
3163 /* If operating in IOV mode set RLPML for X540 */
3164 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) &&
3165 hw->mac.type == ixgbe_mac_X540) {
3166 rxdctl &= ~IXGBE_RXDCTL_RLPMLMASK;
3167 rxdctl |= ((ring->netdev->mtu + ETH_HLEN +
3168 ETH_FCS_LEN + VLAN_HLEN) | IXGBE_RXDCTL_RLPML_EN);
3169 }
3170
3171 if (hw->mac.type == ixgbe_mac_82598EB) {
3172 /*
3173 * enable cache line friendly hardware writes:
3174 * PTHRESH=32 descriptors (half the internal cache),
3175 * this also removes ugly rx_no_buffer_count increment
3176 * HTHRESH=4 descriptors (to minimize latency on fetch)
3177 * WTHRESH=8 burst writeback up to two cache lines
3178 */
3179 rxdctl &= ~0x3FFFFF;
3180 rxdctl |= 0x080420;
3181 }
3182
3183 /* enable receive descriptor ring */
3184 rxdctl |= IXGBE_RXDCTL_ENABLE;
3185 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3186
3187 ixgbe_rx_desc_queue_enable(adapter, ring);
3188 ixgbe_alloc_rx_buffers(ring, IXGBE_DESC_UNUSED(ring));
3189 }
3190
3191 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
3192 {
3193 struct ixgbe_hw *hw = &adapter->hw;
3194 int p;
3195
3196 /* PSRTYPE must be initialized in non 82598 adapters */
3197 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
3198 IXGBE_PSRTYPE_UDPHDR |
3199 IXGBE_PSRTYPE_IPV4HDR |
3200 IXGBE_PSRTYPE_L2HDR |
3201 IXGBE_PSRTYPE_IPV6HDR;
3202
3203 if (hw->mac.type == ixgbe_mac_82598EB)
3204 return;
3205
3206 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED)
3207 psrtype |= (adapter->num_rx_queues_per_pool << 29);
3208
3209 for (p = 0; p < adapter->num_rx_pools; p++)
3210 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(adapter->num_vfs + p),
3211 psrtype);
3212 }
3213
3214 static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
3215 {
3216 struct ixgbe_hw *hw = &adapter->hw;
3217 u32 gcr_ext;
3218 u32 vt_reg_bits;
3219 u32 reg_offset, vf_shift;
3220 u32 vmdctl;
3221
3222 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
3223 return;
3224
3225 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
3226 vt_reg_bits = IXGBE_VMD_CTL_VMDQ_EN | IXGBE_VT_CTL_REPLEN;
3227 vt_reg_bits |= (adapter->num_vfs << IXGBE_VT_CTL_POOL_SHIFT);
3228 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl | vt_reg_bits);
3229
3230 vf_shift = adapter->num_vfs % 32;
3231 reg_offset = (adapter->num_vfs > 32) ? 1 : 0;
3232
3233 /* Enable only the PF's pool for Tx/Rx */
3234 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (1 << vf_shift));
3235 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), 0);
3236 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (1 << vf_shift));
3237 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), 0);
3238 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
3239
3240 /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
3241 hw->mac.ops.set_vmdq(hw, 0, adapter->num_vfs);
3242
3243 /*
3244 * Set up VF register offsets for selected VT Mode,
3245 * i.e. 32 or 64 VFs for SR-IOV
3246 */
3247 gcr_ext = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
3248 gcr_ext |= IXGBE_GCR_EXT_MSIX_EN;
3249 gcr_ext |= IXGBE_GCR_EXT_VT_MODE_64;
3250 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
3251
3252 /* enable Tx loopback for VF/PF communication */
3253 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
3254 /* Enable MAC Anti-Spoofing */
3255 hw->mac.ops.set_mac_anti_spoofing(hw,
3256 (adapter->antispoofing_enabled =
3257 (adapter->num_vfs != 0)),
3258 adapter->num_vfs);
3259 }
3260
3261 static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
3262 {
3263 struct ixgbe_hw *hw = &adapter->hw;
3264 struct net_device *netdev = adapter->netdev;
3265 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3266 int rx_buf_len;
3267 struct ixgbe_ring *rx_ring;
3268 int i;
3269 u32 mhadd, hlreg0;
3270
3271 /* Decide whether to use packet split mode or not */
3272 /* On by default */
3273 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
3274
3275 /* Do not use packet split if we're in SR-IOV Mode */
3276 if (adapter->num_vfs)
3277 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
3278
3279 /* Disable packet split due to 82599 erratum #45 */
3280 if (hw->mac.type == ixgbe_mac_82599EB)
3281 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
3282
3283 /* Set the RX buffer length according to the mode */
3284 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
3285 rx_buf_len = IXGBE_RX_HDR_SIZE;
3286 } else {
3287 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
3288 (netdev->mtu <= ETH_DATA_LEN))
3289 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3290 else
3291 rx_buf_len = ALIGN(max_frame + VLAN_HLEN, 1024);
3292 }
3293
3294 #ifdef IXGBE_FCOE
3295 /* adjust max frame to be able to do baby jumbo for FCoE */
3296 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
3297 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
3298 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
3299
3300 #endif /* IXGBE_FCOE */
3301 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
3302 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
3303 mhadd &= ~IXGBE_MHADD_MFS_MASK;
3304 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
3305
3306 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
3307 }
3308
3309 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
3310 /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
3311 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
3312 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
3313
3314 /*
3315 * Setup the HW Rx Head and Tail Descriptor Pointers and
3316 * the Base and Length of the Rx Descriptor Ring
3317 */
3318 for (i = 0; i < adapter->num_rx_queues; i++) {
3319 rx_ring = adapter->rx_ring[i];
3320 rx_ring->rx_buf_len = rx_buf_len;
3321
3322 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
3323 set_ring_ps_enabled(rx_ring);
3324 else
3325 clear_ring_ps_enabled(rx_ring);
3326
3327 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
3328 set_ring_rsc_enabled(rx_ring);
3329 else
3330 clear_ring_rsc_enabled(rx_ring);
3331
3332 #ifdef IXGBE_FCOE
3333 if (netdev->features & NETIF_F_FCOE_MTU) {
3334 struct ixgbe_ring_feature *f;
3335 f = &adapter->ring_feature[RING_F_FCOE];
3336 if ((i >= f->mask) && (i < f->mask + f->indices)) {
3337 clear_ring_ps_enabled(rx_ring);
3338 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
3339 rx_ring->rx_buf_len =
3340 IXGBE_FCOE_JUMBO_FRAME_SIZE;
3341 } else if (!ring_is_rsc_enabled(rx_ring) &&
3342 !ring_is_ps_enabled(rx_ring)) {
3343 rx_ring->rx_buf_len =
3344 IXGBE_FCOE_JUMBO_FRAME_SIZE;
3345 }
3346 }
3347 #endif /* IXGBE_FCOE */
3348 }
3349 }
3350
3351 static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
3352 {
3353 struct ixgbe_hw *hw = &adapter->hw;
3354 u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
3355
3356 switch (hw->mac.type) {
3357 case ixgbe_mac_82598EB:
3358 /*
3359 * For VMDq support of different descriptor types or
3360 * buffer sizes through the use of multiple SRRCTL
3361 * registers, RDRXCTL.MVMEN must be set to 1
3362 *
3363 * also, the manual doesn't mention it clearly but DCA hints
3364 * will only use queue 0's tags unless this bit is set. Side
3365 * effects of setting this bit are only that SRRCTL must be
3366 * fully programmed [0..15]
3367 */
3368 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
3369 break;
3370 case ixgbe_mac_82599EB:
3371 case ixgbe_mac_X540:
3372 /* Disable RSC for ACK packets */
3373 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
3374 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
3375 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
3376 /* hardware requires some bits to be set by default */
3377 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
3378 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
3379 break;
3380 default:
3381 /* We should do nothing since we don't know this hardware */
3382 return;
3383 }
3384
3385 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
3386 }
3387
3388 /**
3389 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
3390 * @adapter: board private structure
3391 *
3392 * Configure the Rx unit of the MAC after a reset.
3393 **/
3394 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
3395 {
3396 struct ixgbe_hw *hw = &adapter->hw;
3397 int i;
3398 u32 rxctrl;
3399
3400 /* disable receives while setting up the descriptors */
3401 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3402 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3403
3404 ixgbe_setup_psrtype(adapter);
3405 ixgbe_setup_rdrxctl(adapter);
3406
3407 /* Program registers for the distribution of queues */
3408 ixgbe_setup_mrqc(adapter);
3409
3410 ixgbe_set_uta(adapter);
3411
3412 /* set_rx_buffer_len must be called before ring initialization */
3413 ixgbe_set_rx_buffer_len(adapter);
3414
3415 /*
3416 * Setup the HW Rx Head and Tail Descriptor Pointers and
3417 * the Base and Length of the Rx Descriptor Ring
3418 */
3419 for (i = 0; i < adapter->num_rx_queues; i++)
3420 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
3421
3422 /* disable drop enable for 82598 parts */
3423 if (hw->mac.type == ixgbe_mac_82598EB)
3424 rxctrl |= IXGBE_RXCTRL_DMBYPS;
3425
3426 /* enable all receives */
3427 rxctrl |= IXGBE_RXCTRL_RXEN;
3428 hw->mac.ops.enable_rx_dma(hw, rxctrl);
3429 }
3430
3431 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
3432 {
3433 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3434 struct ixgbe_hw *hw = &adapter->hw;
3435 int pool_ndx = adapter->num_vfs;
3436
3437 /* add VID to filter table */
3438 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, true);
3439 set_bit(vid, adapter->active_vlans);
3440 }
3441
3442 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
3443 {
3444 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3445 struct ixgbe_hw *hw = &adapter->hw;
3446 int pool_ndx = adapter->num_vfs;
3447
3448 /* remove VID from filter table */
3449 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, false);
3450 clear_bit(vid, adapter->active_vlans);
3451 }
3452
3453 /**
3454 * ixgbe_vlan_filter_disable - helper to disable hw vlan filtering
3455 * @adapter: driver data
3456 */
3457 static void ixgbe_vlan_filter_disable(struct ixgbe_adapter *adapter)
3458 {
3459 struct ixgbe_hw *hw = &adapter->hw;
3460 u32 vlnctrl;
3461
3462 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3463 vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
3464 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3465 }
3466
3467 /**
3468 * ixgbe_vlan_filter_enable - helper to enable hw vlan filtering
3469 * @adapter: driver data
3470 */
3471 static void ixgbe_vlan_filter_enable(struct ixgbe_adapter *adapter)
3472 {
3473 struct ixgbe_hw *hw = &adapter->hw;
3474 u32 vlnctrl;
3475
3476 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3477 vlnctrl |= IXGBE_VLNCTRL_VFE;
3478 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
3479 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3480 }
3481
3482 /**
3483 * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping
3484 * @adapter: driver data
3485 */
3486 static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
3487 {
3488 struct ixgbe_hw *hw = &adapter->hw;
3489 u32 vlnctrl;
3490 int i, j;
3491
3492 switch (hw->mac.type) {
3493 case ixgbe_mac_82598EB:
3494 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3495 vlnctrl &= ~IXGBE_VLNCTRL_VME;
3496 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3497 break;
3498 case ixgbe_mac_82599EB:
3499 case ixgbe_mac_X540:
3500 for (i = 0; i < adapter->num_rx_queues; i++) {
3501 j = adapter->rx_ring[i]->reg_idx;
3502 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3503 vlnctrl &= ~IXGBE_RXDCTL_VME;
3504 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3505 }
3506 break;
3507 default:
3508 break;
3509 }
3510 }
3511
3512 /**
3513 * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping
3514 * @adapter: driver data
3515 */
3516 static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
3517 {
3518 struct ixgbe_hw *hw = &adapter->hw;
3519 u32 vlnctrl;
3520 int i, j;
3521
3522 switch (hw->mac.type) {
3523 case ixgbe_mac_82598EB:
3524 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3525 vlnctrl |= IXGBE_VLNCTRL_VME;
3526 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3527 break;
3528 case ixgbe_mac_82599EB:
3529 case ixgbe_mac_X540:
3530 for (i = 0; i < adapter->num_rx_queues; i++) {
3531 j = adapter->rx_ring[i]->reg_idx;
3532 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3533 vlnctrl |= IXGBE_RXDCTL_VME;
3534 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3535 }
3536 break;
3537 default:
3538 break;
3539 }
3540 }
3541
3542 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
3543 {
3544 u16 vid;
3545
3546 ixgbe_vlan_rx_add_vid(adapter->netdev, 0);
3547
3548 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
3549 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
3550 }
3551
3552 /**
3553 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
3554 * @netdev: network interface device structure
3555 *
3556 * Writes unicast address list to the RAR table.
3557 * Returns: -ENOMEM on failure/insufficient address space
3558 * 0 on no addresses written
3559 * X on writing X addresses to the RAR table
3560 **/
3561 static int ixgbe_write_uc_addr_list(struct net_device *netdev)
3562 {
3563 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3564 struct ixgbe_hw *hw = &adapter->hw;
3565 unsigned int vfn = adapter->num_vfs;
3566 unsigned int rar_entries = IXGBE_MAX_PF_MACVLANS;
3567 int count = 0;
3568
3569 /* return ENOMEM indicating insufficient memory for addresses */
3570 if (netdev_uc_count(netdev) > rar_entries)
3571 return -ENOMEM;
3572
3573 if (!netdev_uc_empty(netdev) && rar_entries) {
3574 struct netdev_hw_addr *ha;
3575 /* return error if we do not support writing to RAR table */
3576 if (!hw->mac.ops.set_rar)
3577 return -ENOMEM;
3578
3579 netdev_for_each_uc_addr(ha, netdev) {
3580 if (!rar_entries)
3581 break;
3582 hw->mac.ops.set_rar(hw, rar_entries--, ha->addr,
3583 vfn, IXGBE_RAH_AV);
3584 count++;
3585 }
3586 }
3587 /* write the addresses in reverse order to avoid write combining */
3588 for (; rar_entries > 0 ; rar_entries--)
3589 hw->mac.ops.clear_rar(hw, rar_entries);
3590
3591 return count;
3592 }
3593
3594 /**
3595 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
3596 * @netdev: network interface device structure
3597 *
3598 * The set_rx_method entry point is called whenever the unicast/multicast
3599 * address list or the network interface flags are updated. This routine is
3600 * responsible for configuring the hardware for proper unicast, multicast and
3601 * promiscuous mode.
3602 **/
3603 void ixgbe_set_rx_mode(struct net_device *netdev)
3604 {
3605 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3606 struct ixgbe_hw *hw = &adapter->hw;
3607 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
3608 int count;
3609
3610 /* Check for Promiscuous and All Multicast modes */
3611
3612 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3613
3614 /* set all bits that we expect to always be set */
3615 fctrl |= IXGBE_FCTRL_BAM;
3616 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
3617 fctrl |= IXGBE_FCTRL_PMCF;
3618
3619 /* clear the bits we are changing the status of */
3620 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3621
3622 if (netdev->flags & IFF_PROMISC) {
3623 hw->addr_ctrl.user_set_promisc = true;
3624 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3625 vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_MPE);
3626 /* don't hardware filter vlans in promisc mode */
3627 ixgbe_vlan_filter_disable(adapter);
3628 } else {
3629 if (netdev->flags & IFF_ALLMULTI) {
3630 fctrl |= IXGBE_FCTRL_MPE;
3631 vmolr |= IXGBE_VMOLR_MPE;
3632 } else {
3633 /*
3634 * Write addresses to the MTA, if the attempt fails
3635 * then we should just turn on promiscuous mode so
3636 * that we can at least receive multicast traffic
3637 */
3638 hw->mac.ops.update_mc_addr_list(hw, netdev);
3639 vmolr |= IXGBE_VMOLR_ROMPE;
3640 }
3641 ixgbe_vlan_filter_enable(adapter);
3642 hw->addr_ctrl.user_set_promisc = false;
3643 /*
3644 * Write addresses to available RAR registers, if there is not
3645 * sufficient space to store all the addresses then enable
3646 * unicast promiscuous mode
3647 */
3648 count = ixgbe_write_uc_addr_list(netdev);
3649 if (count < 0) {
3650 fctrl |= IXGBE_FCTRL_UPE;
3651 vmolr |= IXGBE_VMOLR_ROPE;
3652 }
3653 }
3654
3655 if (adapter->num_vfs) {
3656 ixgbe_restore_vf_multicasts(adapter);
3657 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(adapter->num_vfs)) &
3658 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
3659 IXGBE_VMOLR_ROPE);
3660 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(adapter->num_vfs), vmolr);
3661 }
3662
3663 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
3664
3665 if (netdev->features & NETIF_F_HW_VLAN_RX)
3666 ixgbe_vlan_strip_enable(adapter);
3667 else
3668 ixgbe_vlan_strip_disable(adapter);
3669 }
3670
3671 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
3672 {
3673 int q_idx;
3674 struct ixgbe_q_vector *q_vector;
3675 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3676
3677 /* legacy and MSI only use one vector */
3678 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3679 q_vectors = 1;
3680
3681 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3682 struct napi_struct *napi;
3683 q_vector = adapter->q_vector[q_idx];
3684 napi = &q_vector->napi;
3685 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3686 if (!q_vector->rxr_count || !q_vector->txr_count) {
3687 if (q_vector->txr_count == 1)
3688 napi->poll = &ixgbe_clean_txonly;
3689 else if (q_vector->rxr_count == 1)
3690 napi->poll = &ixgbe_clean_rxonly;
3691 }
3692 }
3693
3694 napi_enable(napi);
3695 }
3696 }
3697
3698 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
3699 {
3700 int q_idx;
3701 struct ixgbe_q_vector *q_vector;
3702 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3703
3704 /* legacy and MSI only use one vector */
3705 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3706 q_vectors = 1;
3707
3708 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3709 q_vector = adapter->q_vector[q_idx];
3710 napi_disable(&q_vector->napi);
3711 }
3712 }
3713
3714 #ifdef CONFIG_IXGBE_DCB
3715 /*
3716 * ixgbe_configure_dcb - Configure DCB hardware
3717 * @adapter: ixgbe adapter struct
3718 *
3719 * This is called by the driver on open to configure the DCB hardware.
3720 * This is also called by the gennetlink interface when reconfiguring
3721 * the DCB state.
3722 */
3723 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
3724 {
3725 struct ixgbe_hw *hw = &adapter->hw;
3726 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3727
3728 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
3729 if (hw->mac.type == ixgbe_mac_82598EB)
3730 netif_set_gso_max_size(adapter->netdev, 65536);
3731 return;
3732 }
3733
3734 if (hw->mac.type == ixgbe_mac_82598EB)
3735 netif_set_gso_max_size(adapter->netdev, 32768);
3736
3737
3738 /* Enable VLAN tag insert/strip */
3739 adapter->netdev->features |= NETIF_F_HW_VLAN_RX;
3740
3741 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
3742
3743 /* reconfigure the hardware */
3744 if (adapter->dcbx_cap & (DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE)) {
3745 #ifdef CONFIG_FCOE
3746 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
3747 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
3748 #endif
3749 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3750 DCB_TX_CONFIG);
3751 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3752 DCB_RX_CONFIG);
3753 ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
3754 } else {
3755 struct net_device *dev = adapter->netdev;
3756
3757 if (adapter->ixgbe_ieee_ets)
3758 dev->dcbnl_ops->ieee_setets(dev,
3759 adapter->ixgbe_ieee_ets);
3760 if (adapter->ixgbe_ieee_pfc)
3761 dev->dcbnl_ops->ieee_setpfc(dev,
3762 adapter->ixgbe_ieee_pfc);
3763 }
3764
3765 /* Enable RSS Hash per TC */
3766 if (hw->mac.type != ixgbe_mac_82598EB) {
3767 int i;
3768 u32 reg = 0;
3769
3770 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
3771 u8 msb = 0;
3772 u8 cnt = adapter->netdev->tc_to_txq[i].count;
3773
3774 while (cnt >>= 1)
3775 msb++;
3776
3777 reg |= msb << IXGBE_RQTC_SHIFT_TC(i);
3778 }
3779 IXGBE_WRITE_REG(hw, IXGBE_RQTC, reg);
3780 }
3781 }
3782
3783 #endif
3784
3785 static void ixgbe_configure_pb(struct ixgbe_adapter *adapter)
3786 {
3787 int hdrm = 0;
3788 int num_tc = netdev_get_num_tc(adapter->netdev);
3789 struct ixgbe_hw *hw = &adapter->hw;
3790
3791 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3792 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
3793 hdrm = 64 << adapter->fdir_pballoc;
3794
3795 hw->mac.ops.set_rxpba(&adapter->hw, num_tc, hdrm, PBA_STRATEGY_EQUAL);
3796 }
3797
3798 static void ixgbe_configure(struct ixgbe_adapter *adapter)
3799 {
3800 struct net_device *netdev = adapter->netdev;
3801 struct ixgbe_hw *hw = &adapter->hw;
3802 int i;
3803
3804 ixgbe_configure_pb(adapter);
3805 #ifdef CONFIG_IXGBE_DCB
3806 ixgbe_configure_dcb(adapter);
3807 #endif
3808
3809 ixgbe_set_rx_mode(netdev);
3810 ixgbe_restore_vlan(adapter);
3811
3812 #ifdef IXGBE_FCOE
3813 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
3814 ixgbe_configure_fcoe(adapter);
3815
3816 #endif /* IXGBE_FCOE */
3817 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3818 for (i = 0; i < adapter->num_tx_queues; i++)
3819 adapter->tx_ring[i]->atr_sample_rate =
3820 adapter->atr_sample_rate;
3821 ixgbe_init_fdir_signature_82599(hw, adapter->fdir_pballoc);
3822 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
3823 ixgbe_init_fdir_perfect_82599(hw, adapter->fdir_pballoc);
3824 }
3825 ixgbe_configure_virtualization(adapter);
3826
3827 ixgbe_configure_tx(adapter);
3828 ixgbe_configure_rx(adapter);
3829 }
3830
3831 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
3832 {
3833 switch (hw->phy.type) {
3834 case ixgbe_phy_sfp_avago:
3835 case ixgbe_phy_sfp_ftl:
3836 case ixgbe_phy_sfp_intel:
3837 case ixgbe_phy_sfp_unknown:
3838 case ixgbe_phy_sfp_passive_tyco:
3839 case ixgbe_phy_sfp_passive_unknown:
3840 case ixgbe_phy_sfp_active_unknown:
3841 case ixgbe_phy_sfp_ftl_active:
3842 return true;
3843 default:
3844 return false;
3845 }
3846 }
3847
3848 /**
3849 * ixgbe_sfp_link_config - set up SFP+ link
3850 * @adapter: pointer to private adapter struct
3851 **/
3852 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
3853 {
3854 /*
3855 * We are assuming the worst case scenerio here, and that
3856 * is that an SFP was inserted/removed after the reset
3857 * but before SFP detection was enabled. As such the best
3858 * solution is to just start searching as soon as we start
3859 */
3860 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
3861 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
3862
3863 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
3864 }
3865
3866 /**
3867 * ixgbe_non_sfp_link_config - set up non-SFP+ link
3868 * @hw: pointer to private hardware struct
3869 *
3870 * Returns 0 on success, negative on failure
3871 **/
3872 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
3873 {
3874 u32 autoneg;
3875 bool negotiation, link_up = false;
3876 u32 ret = IXGBE_ERR_LINK_SETUP;
3877
3878 if (hw->mac.ops.check_link)
3879 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
3880
3881 if (ret)
3882 goto link_cfg_out;
3883
3884 autoneg = hw->phy.autoneg_advertised;
3885 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
3886 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg,
3887 &negotiation);
3888 if (ret)
3889 goto link_cfg_out;
3890
3891 if (hw->mac.ops.setup_link)
3892 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
3893 link_cfg_out:
3894 return ret;
3895 }
3896
3897 static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
3898 {
3899 struct ixgbe_hw *hw = &adapter->hw;
3900 u32 gpie = 0;
3901
3902 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3903 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
3904 IXGBE_GPIE_OCD;
3905 gpie |= IXGBE_GPIE_EIAME;
3906 /*
3907 * use EIAM to auto-mask when MSI-X interrupt is asserted
3908 * this saves a register write for every interrupt
3909 */
3910 switch (hw->mac.type) {
3911 case ixgbe_mac_82598EB:
3912 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3913 break;
3914 case ixgbe_mac_82599EB:
3915 case ixgbe_mac_X540:
3916 default:
3917 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
3918 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
3919 break;
3920 }
3921 } else {
3922 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
3923 * specifically only auto mask tx and rx interrupts */
3924 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3925 }
3926
3927 /* XXX: to interrupt immediately for EICS writes, enable this */
3928 /* gpie |= IXGBE_GPIE_EIMEN; */
3929
3930 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3931 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
3932 gpie |= IXGBE_GPIE_VTMODE_64;
3933 }
3934
3935 /* Enable fan failure interrupt */
3936 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
3937 gpie |= IXGBE_SDP1_GPIEN;
3938
3939 if (hw->mac.type == ixgbe_mac_82599EB) {
3940 gpie |= IXGBE_SDP1_GPIEN;
3941 gpie |= IXGBE_SDP2_GPIEN;
3942 }
3943
3944 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3945 }
3946
3947 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
3948 {
3949 struct ixgbe_hw *hw = &adapter->hw;
3950 int err;
3951 u32 ctrl_ext;
3952
3953 ixgbe_get_hw_control(adapter);
3954 ixgbe_setup_gpie(adapter);
3955
3956 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3957 ixgbe_configure_msix(adapter);
3958 else
3959 ixgbe_configure_msi_and_legacy(adapter);
3960
3961 /* enable the optics for both mult-speed fiber and 82599 SFP+ fiber */
3962 if (hw->mac.ops.enable_tx_laser &&
3963 ((hw->phy.multispeed_fiber) ||
3964 ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
3965 (hw->mac.type == ixgbe_mac_82599EB))))
3966 hw->mac.ops.enable_tx_laser(hw);
3967
3968 clear_bit(__IXGBE_DOWN, &adapter->state);
3969 ixgbe_napi_enable_all(adapter);
3970
3971 if (ixgbe_is_sfp(hw)) {
3972 ixgbe_sfp_link_config(adapter);
3973 } else {
3974 err = ixgbe_non_sfp_link_config(hw);
3975 if (err)
3976 e_err(probe, "link_config FAILED %d\n", err);
3977 }
3978
3979 /* clear any pending interrupts, may auto mask */
3980 IXGBE_READ_REG(hw, IXGBE_EICR);
3981 ixgbe_irq_enable(adapter, true, true);
3982
3983 /*
3984 * If this adapter has a fan, check to see if we had a failure
3985 * before we enabled the interrupt.
3986 */
3987 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
3988 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
3989 if (esdp & IXGBE_ESDP_SDP1)
3990 e_crit(drv, "Fan has stopped, replace the adapter\n");
3991 }
3992
3993 /* enable transmits */
3994 netif_tx_start_all_queues(adapter->netdev);
3995
3996 /* bring the link up in the watchdog, this could race with our first
3997 * link up interrupt but shouldn't be a problem */
3998 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
3999 adapter->link_check_timeout = jiffies;
4000 mod_timer(&adapter->service_timer, jiffies);
4001
4002 /* Set PF Reset Done bit so PF/VF Mail Ops can work */
4003 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
4004 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
4005 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
4006
4007 return 0;
4008 }
4009
4010 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
4011 {
4012 WARN_ON(in_interrupt());
4013 /* put off any impending NetWatchDogTimeout */
4014 adapter->netdev->trans_start = jiffies;
4015
4016 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
4017 usleep_range(1000, 2000);
4018 ixgbe_down(adapter);
4019 /*
4020 * If SR-IOV enabled then wait a bit before bringing the adapter
4021 * back up to give the VFs time to respond to the reset. The
4022 * two second wait is based upon the watchdog timer cycle in
4023 * the VF driver.
4024 */
4025 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4026 msleep(2000);
4027 ixgbe_up(adapter);
4028 clear_bit(__IXGBE_RESETTING, &adapter->state);
4029 }
4030
4031 int ixgbe_up(struct ixgbe_adapter *adapter)
4032 {
4033 /* hardware has been reset, we need to reload some things */
4034 ixgbe_configure(adapter);
4035
4036 return ixgbe_up_complete(adapter);
4037 }
4038
4039 void ixgbe_reset(struct ixgbe_adapter *adapter)
4040 {
4041 struct ixgbe_hw *hw = &adapter->hw;
4042 int err;
4043
4044 /* lock SFP init bit to prevent race conditions with the watchdog */
4045 while (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
4046 usleep_range(1000, 2000);
4047
4048 /* clear all SFP and link config related flags while holding SFP_INIT */
4049 adapter->flags2 &= ~(IXGBE_FLAG2_SEARCH_FOR_SFP |
4050 IXGBE_FLAG2_SFP_NEEDS_RESET);
4051 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
4052
4053 err = hw->mac.ops.init_hw(hw);
4054 switch (err) {
4055 case 0:
4056 case IXGBE_ERR_SFP_NOT_PRESENT:
4057 case IXGBE_ERR_SFP_NOT_SUPPORTED:
4058 break;
4059 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
4060 e_dev_err("master disable timed out\n");
4061 break;
4062 case IXGBE_ERR_EEPROM_VERSION:
4063 /* We are running on a pre-production device, log a warning */
4064 e_dev_warn("This device is a pre-production adapter/LOM. "
4065 "Please be aware there may be issuesassociated with "
4066 "your hardware. If you are experiencing problems "
4067 "please contact your Intel or hardware "
4068 "representative who provided you with this "
4069 "hardware.\n");
4070 break;
4071 default:
4072 e_dev_err("Hardware Error: %d\n", err);
4073 }
4074
4075 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
4076
4077 /* reprogram the RAR[0] in case user changed it. */
4078 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
4079 IXGBE_RAH_AV);
4080 }
4081
4082 /**
4083 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
4084 * @rx_ring: ring to free buffers from
4085 **/
4086 static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring)
4087 {
4088 struct device *dev = rx_ring->dev;
4089 unsigned long size;
4090 u16 i;
4091
4092 /* ring already cleared, nothing to do */
4093 if (!rx_ring->rx_buffer_info)
4094 return;
4095
4096 /* Free all the Rx ring sk_buffs */
4097 for (i = 0; i < rx_ring->count; i++) {
4098 struct ixgbe_rx_buffer *rx_buffer_info;
4099
4100 rx_buffer_info = &rx_ring->rx_buffer_info[i];
4101 if (rx_buffer_info->dma) {
4102 dma_unmap_single(rx_ring->dev, rx_buffer_info->dma,
4103 rx_ring->rx_buf_len,
4104 DMA_FROM_DEVICE);
4105 rx_buffer_info->dma = 0;
4106 }
4107 if (rx_buffer_info->skb) {
4108 struct sk_buff *skb = rx_buffer_info->skb;
4109 rx_buffer_info->skb = NULL;
4110 do {
4111 struct sk_buff *this = skb;
4112 if (IXGBE_RSC_CB(this)->delay_unmap) {
4113 dma_unmap_single(dev,
4114 IXGBE_RSC_CB(this)->dma,
4115 rx_ring->rx_buf_len,
4116 DMA_FROM_DEVICE);
4117 IXGBE_RSC_CB(this)->dma = 0;
4118 IXGBE_RSC_CB(skb)->delay_unmap = false;
4119 }
4120 skb = skb->prev;
4121 dev_kfree_skb(this);
4122 } while (skb);
4123 }
4124 if (!rx_buffer_info->page)
4125 continue;
4126 if (rx_buffer_info->page_dma) {
4127 dma_unmap_page(dev, rx_buffer_info->page_dma,
4128 PAGE_SIZE / 2, DMA_FROM_DEVICE);
4129 rx_buffer_info->page_dma = 0;
4130 }
4131 put_page(rx_buffer_info->page);
4132 rx_buffer_info->page = NULL;
4133 rx_buffer_info->page_offset = 0;
4134 }
4135
4136 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4137 memset(rx_ring->rx_buffer_info, 0, size);
4138
4139 /* Zero out the descriptor ring */
4140 memset(rx_ring->desc, 0, rx_ring->size);
4141
4142 rx_ring->next_to_clean = 0;
4143 rx_ring->next_to_use = 0;
4144 }
4145
4146 /**
4147 * ixgbe_clean_tx_ring - Free Tx Buffers
4148 * @tx_ring: ring to be cleaned
4149 **/
4150 static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
4151 {
4152 struct ixgbe_tx_buffer *tx_buffer_info;
4153 unsigned long size;
4154 u16 i;
4155
4156 /* ring already cleared, nothing to do */
4157 if (!tx_ring->tx_buffer_info)
4158 return;
4159
4160 /* Free all the Tx ring sk_buffs */
4161 for (i = 0; i < tx_ring->count; i++) {
4162 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4163 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
4164 }
4165
4166 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
4167 memset(tx_ring->tx_buffer_info, 0, size);
4168
4169 /* Zero out the descriptor ring */
4170 memset(tx_ring->desc, 0, tx_ring->size);
4171
4172 tx_ring->next_to_use = 0;
4173 tx_ring->next_to_clean = 0;
4174 }
4175
4176 /**
4177 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
4178 * @adapter: board private structure
4179 **/
4180 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
4181 {
4182 int i;
4183
4184 for (i = 0; i < adapter->num_rx_queues; i++)
4185 ixgbe_clean_rx_ring(adapter->rx_ring[i]);
4186 }
4187
4188 /**
4189 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
4190 * @adapter: board private structure
4191 **/
4192 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
4193 {
4194 int i;
4195
4196 for (i = 0; i < adapter->num_tx_queues; i++)
4197 ixgbe_clean_tx_ring(adapter->tx_ring[i]);
4198 }
4199
4200 void ixgbe_down(struct ixgbe_adapter *adapter)
4201 {
4202 struct net_device *netdev = adapter->netdev;
4203 struct ixgbe_hw *hw = &adapter->hw;
4204 u32 rxctrl;
4205 int i;
4206 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4207
4208 /* signal that we are down to the interrupt handler */
4209 set_bit(__IXGBE_DOWN, &adapter->state);
4210
4211 /* disable receives */
4212 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
4213 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
4214
4215 /* disable all enabled rx queues */
4216 for (i = 0; i < adapter->num_rx_queues; i++)
4217 /* this call also flushes the previous write */
4218 ixgbe_disable_rx_queue(adapter, adapter->rx_ring[i]);
4219
4220 usleep_range(10000, 20000);
4221
4222 netif_tx_stop_all_queues(netdev);
4223
4224 /* call carrier off first to avoid false dev_watchdog timeouts */
4225 netif_carrier_off(netdev);
4226 netif_tx_disable(netdev);
4227
4228 ixgbe_irq_disable(adapter);
4229
4230 ixgbe_napi_disable_all(adapter);
4231
4232 adapter->flags2 &= ~(IXGBE_FLAG2_FDIR_REQUIRES_REINIT |
4233 IXGBE_FLAG2_RESET_REQUESTED);
4234 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
4235
4236 del_timer_sync(&adapter->service_timer);
4237
4238 /* disable receive for all VFs and wait one second */
4239 if (adapter->num_vfs) {
4240 /* ping all the active vfs to let them know we are going down */
4241 ixgbe_ping_all_vfs(adapter);
4242
4243 /* Disable all VFTE/VFRE TX/RX */
4244 ixgbe_disable_tx_rx(adapter);
4245
4246 /* Mark all the VFs as inactive */
4247 for (i = 0 ; i < adapter->num_vfs; i++)
4248 adapter->vfinfo[i].clear_to_send = 0;
4249 }
4250
4251 /* Cleanup the affinity_hint CPU mask memory and callback */
4252 for (i = 0; i < num_q_vectors; i++) {
4253 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
4254 /* clear the affinity_mask in the IRQ descriptor */
4255 irq_set_affinity_hint(adapter->msix_entries[i]. vector, NULL);
4256 /* release the CPU mask memory */
4257 free_cpumask_var(q_vector->affinity_mask);
4258 }
4259
4260 /* disable transmits in the hardware now that interrupts are off */
4261 for (i = 0; i < adapter->num_tx_queues; i++) {
4262 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
4263 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
4264 }
4265
4266 /* Disable the Tx DMA engine on 82599 and X540 */
4267 switch (hw->mac.type) {
4268 case ixgbe_mac_82599EB:
4269 case ixgbe_mac_X540:
4270 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
4271 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
4272 ~IXGBE_DMATXCTL_TE));
4273 break;
4274 default:
4275 break;
4276 }
4277
4278 if (!pci_channel_offline(adapter->pdev))
4279 ixgbe_reset(adapter);
4280
4281 /* power down the optics for multispeed fiber and 82599 SFP+ fiber */
4282 if (hw->mac.ops.disable_tx_laser &&
4283 ((hw->phy.multispeed_fiber) ||
4284 ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
4285 (hw->mac.type == ixgbe_mac_82599EB))))
4286 hw->mac.ops.disable_tx_laser(hw);
4287
4288 ixgbe_clean_all_tx_rings(adapter);
4289 ixgbe_clean_all_rx_rings(adapter);
4290
4291 #ifdef CONFIG_IXGBE_DCA
4292 /* since we reset the hardware DCA settings were cleared */
4293 ixgbe_setup_dca(adapter);
4294 #endif
4295 }
4296
4297 /**
4298 * ixgbe_poll - NAPI Rx polling callback
4299 * @napi: structure for representing this polling device
4300 * @budget: how many packets driver is allowed to clean
4301 *
4302 * This function is used for legacy and MSI, NAPI mode
4303 **/
4304 static int ixgbe_poll(struct napi_struct *napi, int budget)
4305 {
4306 struct ixgbe_q_vector *q_vector =
4307 container_of(napi, struct ixgbe_q_vector, napi);
4308 struct ixgbe_adapter *adapter = q_vector->adapter;
4309 int tx_clean_complete, work_done = 0;
4310
4311 #ifdef CONFIG_IXGBE_DCA
4312 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
4313 ixgbe_update_dca(q_vector);
4314 #endif
4315
4316 tx_clean_complete = ixgbe_clean_tx_irq(q_vector, adapter->tx_ring[0]);
4317 ixgbe_clean_rx_irq(q_vector, adapter->rx_ring[0], &work_done, budget);
4318
4319 if (!tx_clean_complete)
4320 work_done = budget;
4321
4322 /* If budget not fully consumed, exit the polling mode */
4323 if (work_done < budget) {
4324 napi_complete(napi);
4325 if (adapter->rx_itr_setting & 1)
4326 ixgbe_set_itr(adapter);
4327 if (!test_bit(__IXGBE_DOWN, &adapter->state))
4328 ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
4329 }
4330 return work_done;
4331 }
4332
4333 /**
4334 * ixgbe_tx_timeout - Respond to a Tx Hang
4335 * @netdev: network interface device structure
4336 **/
4337 static void ixgbe_tx_timeout(struct net_device *netdev)
4338 {
4339 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4340
4341 /* Do the reset outside of interrupt context */
4342 ixgbe_tx_timeout_reset(adapter);
4343 }
4344
4345 /**
4346 * ixgbe_set_rss_queues: Allocate queues for RSS
4347 * @adapter: board private structure to initialize
4348 *
4349 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
4350 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
4351 *
4352 **/
4353 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
4354 {
4355 bool ret = false;
4356 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
4357
4358 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4359 f->mask = 0xF;
4360 adapter->num_rx_queues = f->indices;
4361 adapter->num_tx_queues = f->indices;
4362 ret = true;
4363 } else {
4364 ret = false;
4365 }
4366
4367 return ret;
4368 }
4369
4370 /**
4371 * ixgbe_set_fdir_queues: Allocate queues for Flow Director
4372 * @adapter: board private structure to initialize
4373 *
4374 * Flow Director is an advanced Rx filter, attempting to get Rx flows back
4375 * to the original CPU that initiated the Tx session. This runs in addition
4376 * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
4377 * Rx load across CPUs using RSS.
4378 *
4379 **/
4380 static inline bool ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
4381 {
4382 bool ret = false;
4383 struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
4384
4385 f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
4386 f_fdir->mask = 0;
4387
4388 /* Flow Director must have RSS enabled */
4389 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
4390 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
4391 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)))) {
4392 adapter->num_tx_queues = f_fdir->indices;
4393 adapter->num_rx_queues = f_fdir->indices;
4394 ret = true;
4395 } else {
4396 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4397 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4398 }
4399 return ret;
4400 }
4401
4402 #ifdef IXGBE_FCOE
4403 /**
4404 * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
4405 * @adapter: board private structure to initialize
4406 *
4407 * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
4408 * The ring feature mask is not used as a mask for FCoE, as it can take any 8
4409 * rx queues out of the max number of rx queues, instead, it is used as the
4410 * index of the first rx queue used by FCoE.
4411 *
4412 **/
4413 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
4414 {
4415 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4416
4417 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
4418 return false;
4419
4420 f->indices = min((int)num_online_cpus(), f->indices);
4421
4422 adapter->num_rx_queues = 1;
4423 adapter->num_tx_queues = 1;
4424
4425 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4426 e_info(probe, "FCoE enabled with RSS\n");
4427 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4428 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
4429 ixgbe_set_fdir_queues(adapter);
4430 else
4431 ixgbe_set_rss_queues(adapter);
4432 }
4433 /* adding FCoE rx rings to the end */
4434 f->mask = adapter->num_rx_queues;
4435 adapter->num_rx_queues += f->indices;
4436 adapter->num_tx_queues += f->indices;
4437
4438 return true;
4439 }
4440 #endif /* IXGBE_FCOE */
4441
4442 /* Artificial max queue cap per traffic class in DCB mode */
4443 #define DCB_QUEUE_CAP 8
4444
4445 #ifdef CONFIG_IXGBE_DCB
4446 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
4447 {
4448 int per_tc_q, q, i, offset = 0;
4449 struct net_device *dev = adapter->netdev;
4450 int tcs = netdev_get_num_tc(dev);
4451
4452 if (!tcs)
4453 return false;
4454
4455 /* Map queue offset and counts onto allocated tx queues */
4456 per_tc_q = min(dev->num_tx_queues / tcs, (unsigned int)DCB_QUEUE_CAP);
4457 q = min((int)num_online_cpus(), per_tc_q);
4458
4459 for (i = 0; i < tcs; i++) {
4460 netdev_set_prio_tc_map(dev, i, i);
4461 netdev_set_tc_queue(dev, i, q, offset);
4462 offset += q;
4463 }
4464
4465 adapter->num_tx_queues = q * tcs;
4466 adapter->num_rx_queues = q * tcs;
4467
4468 #ifdef IXGBE_FCOE
4469 /* FCoE enabled queues require special configuration indexed
4470 * by feature specific indices and mask. Here we map FCoE
4471 * indices onto the DCB queue pairs allowing FCoE to own
4472 * configuration later.
4473 */
4474 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
4475 int tc;
4476 struct ixgbe_ring_feature *f =
4477 &adapter->ring_feature[RING_F_FCOE];
4478
4479 tc = netdev_get_prio_tc_map(dev, adapter->fcoe.up);
4480 f->indices = dev->tc_to_txq[tc].count;
4481 f->mask = dev->tc_to_txq[tc].offset;
4482 }
4483 #endif
4484
4485 return true;
4486 }
4487 #endif
4488
4489 /**
4490 * ixgbe_set_sriov_queues: Allocate queues for IOV use
4491 * @adapter: board private structure to initialize
4492 *
4493 * IOV doesn't actually use anything, so just NAK the
4494 * request for now and let the other queue routines
4495 * figure out what to do.
4496 */
4497 static inline bool ixgbe_set_sriov_queues(struct ixgbe_adapter *adapter)
4498 {
4499 return false;
4500 }
4501
4502 /*
4503 * ixgbe_set_num_queues: Allocate queues for device, feature dependent
4504 * @adapter: board private structure to initialize
4505 *
4506 * This is the top level queue allocation routine. The order here is very
4507 * important, starting with the "most" number of features turned on at once,
4508 * and ending with the smallest set of features. This way large combinations
4509 * can be allocated if they're turned on, and smaller combinations are the
4510 * fallthrough conditions.
4511 *
4512 **/
4513 static int ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
4514 {
4515 /* Start with base case */
4516 adapter->num_rx_queues = 1;
4517 adapter->num_tx_queues = 1;
4518 adapter->num_rx_pools = adapter->num_rx_queues;
4519 adapter->num_rx_queues_per_pool = 1;
4520
4521 if (ixgbe_set_sriov_queues(adapter))
4522 goto done;
4523
4524 #ifdef CONFIG_IXGBE_DCB
4525 if (ixgbe_set_dcb_queues(adapter))
4526 goto done;
4527
4528 #endif
4529 #ifdef IXGBE_FCOE
4530 if (ixgbe_set_fcoe_queues(adapter))
4531 goto done;
4532
4533 #endif /* IXGBE_FCOE */
4534 if (ixgbe_set_fdir_queues(adapter))
4535 goto done;
4536
4537 if (ixgbe_set_rss_queues(adapter))
4538 goto done;
4539
4540 /* fallback to base case */
4541 adapter->num_rx_queues = 1;
4542 adapter->num_tx_queues = 1;
4543
4544 done:
4545 /* Notify the stack of the (possibly) reduced queue counts. */
4546 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
4547 return netif_set_real_num_rx_queues(adapter->netdev,
4548 adapter->num_rx_queues);
4549 }
4550
4551 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
4552 int vectors)
4553 {
4554 int err, vector_threshold;
4555
4556 /* We'll want at least 3 (vector_threshold):
4557 * 1) TxQ[0] Cleanup
4558 * 2) RxQ[0] Cleanup
4559 * 3) Other (Link Status Change, etc.)
4560 * 4) TCP Timer (optional)
4561 */
4562 vector_threshold = MIN_MSIX_COUNT;
4563
4564 /* The more we get, the more we will assign to Tx/Rx Cleanup
4565 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
4566 * Right now, we simply care about how many we'll get; we'll
4567 * set them up later while requesting irq's.
4568 */
4569 while (vectors >= vector_threshold) {
4570 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
4571 vectors);
4572 if (!err) /* Success in acquiring all requested vectors. */
4573 break;
4574 else if (err < 0)
4575 vectors = 0; /* Nasty failure, quit now */
4576 else /* err == number of vectors we should try again with */
4577 vectors = err;
4578 }
4579
4580 if (vectors < vector_threshold) {
4581 /* Can't allocate enough MSI-X interrupts? Oh well.
4582 * This just means we'll go with either a single MSI
4583 * vector or fall back to legacy interrupts.
4584 */
4585 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4586 "Unable to allocate MSI-X interrupts\n");
4587 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4588 kfree(adapter->msix_entries);
4589 adapter->msix_entries = NULL;
4590 } else {
4591 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
4592 /*
4593 * Adjust for only the vectors we'll use, which is minimum
4594 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
4595 * vectors we were allocated.
4596 */
4597 adapter->num_msix_vectors = min(vectors,
4598 adapter->max_msix_q_vectors + NON_Q_VECTORS);
4599 }
4600 }
4601
4602 /**
4603 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
4604 * @adapter: board private structure to initialize
4605 *
4606 * Cache the descriptor ring offsets for RSS to the assigned rings.
4607 *
4608 **/
4609 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
4610 {
4611 int i;
4612
4613 if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED))
4614 return false;
4615
4616 for (i = 0; i < adapter->num_rx_queues; i++)
4617 adapter->rx_ring[i]->reg_idx = i;
4618 for (i = 0; i < adapter->num_tx_queues; i++)
4619 adapter->tx_ring[i]->reg_idx = i;
4620
4621 return true;
4622 }
4623
4624 #ifdef CONFIG_IXGBE_DCB
4625
4626 /* ixgbe_get_first_reg_idx - Return first register index associated with ring */
4627 static void ixgbe_get_first_reg_idx(struct ixgbe_adapter *adapter, u8 tc,
4628 unsigned int *tx, unsigned int *rx)
4629 {
4630 struct net_device *dev = adapter->netdev;
4631 struct ixgbe_hw *hw = &adapter->hw;
4632 u8 num_tcs = netdev_get_num_tc(dev);
4633
4634 *tx = 0;
4635 *rx = 0;
4636
4637 switch (hw->mac.type) {
4638 case ixgbe_mac_82598EB:
4639 *tx = tc << 3;
4640 *rx = tc << 2;
4641 break;
4642 case ixgbe_mac_82599EB:
4643 case ixgbe_mac_X540:
4644 if (num_tcs == 8) {
4645 if (tc < 3) {
4646 *tx = tc << 5;
4647 *rx = tc << 4;
4648 } else if (tc < 5) {
4649 *tx = ((tc + 2) << 4);
4650 *rx = tc << 4;
4651 } else if (tc < num_tcs) {
4652 *tx = ((tc + 8) << 3);
4653 *rx = tc << 4;
4654 }
4655 } else if (num_tcs == 4) {
4656 *rx = tc << 5;
4657 switch (tc) {
4658 case 0:
4659 *tx = 0;
4660 break;
4661 case 1:
4662 *tx = 64;
4663 break;
4664 case 2:
4665 *tx = 96;
4666 break;
4667 case 3:
4668 *tx = 112;
4669 break;
4670 default:
4671 break;
4672 }
4673 }
4674 break;
4675 default:
4676 break;
4677 }
4678 }
4679
4680 /**
4681 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
4682 * @adapter: board private structure to initialize
4683 *
4684 * Cache the descriptor ring offsets for DCB to the assigned rings.
4685 *
4686 **/
4687 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
4688 {
4689 struct net_device *dev = adapter->netdev;
4690 int i, j, k;
4691 u8 num_tcs = netdev_get_num_tc(dev);
4692
4693 if (!num_tcs)
4694 return false;
4695
4696 for (i = 0, k = 0; i < num_tcs; i++) {
4697 unsigned int tx_s, rx_s;
4698 u16 count = dev->tc_to_txq[i].count;
4699
4700 ixgbe_get_first_reg_idx(adapter, i, &tx_s, &rx_s);
4701 for (j = 0; j < count; j++, k++) {
4702 adapter->tx_ring[k]->reg_idx = tx_s + j;
4703 adapter->rx_ring[k]->reg_idx = rx_s + j;
4704 adapter->tx_ring[k]->dcb_tc = i;
4705 adapter->rx_ring[k]->dcb_tc = i;
4706 }
4707 }
4708
4709 return true;
4710 }
4711 #endif
4712
4713 /**
4714 * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
4715 * @adapter: board private structure to initialize
4716 *
4717 * Cache the descriptor ring offsets for Flow Director to the assigned rings.
4718 *
4719 **/
4720 static inline bool ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
4721 {
4722 int i;
4723 bool ret = false;
4724
4725 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
4726 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4727 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))) {
4728 for (i = 0; i < adapter->num_rx_queues; i++)
4729 adapter->rx_ring[i]->reg_idx = i;
4730 for (i = 0; i < adapter->num_tx_queues; i++)
4731 adapter->tx_ring[i]->reg_idx = i;
4732 ret = true;
4733 }
4734
4735 return ret;
4736 }
4737
4738 #ifdef IXGBE_FCOE
4739 /**
4740 * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
4741 * @adapter: board private structure to initialize
4742 *
4743 * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
4744 *
4745 */
4746 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
4747 {
4748 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4749 int i;
4750 u8 fcoe_rx_i = 0, fcoe_tx_i = 0;
4751
4752 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
4753 return false;
4754
4755 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4756 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4757 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
4758 ixgbe_cache_ring_fdir(adapter);
4759 else
4760 ixgbe_cache_ring_rss(adapter);
4761
4762 fcoe_rx_i = f->mask;
4763 fcoe_tx_i = f->mask;
4764 }
4765 for (i = 0; i < f->indices; i++, fcoe_rx_i++, fcoe_tx_i++) {
4766 adapter->rx_ring[f->mask + i]->reg_idx = fcoe_rx_i;
4767 adapter->tx_ring[f->mask + i]->reg_idx = fcoe_tx_i;
4768 }
4769 return true;
4770 }
4771
4772 #endif /* IXGBE_FCOE */
4773 /**
4774 * ixgbe_cache_ring_sriov - Descriptor ring to register mapping for sriov
4775 * @adapter: board private structure to initialize
4776 *
4777 * SR-IOV doesn't use any descriptor rings but changes the default if
4778 * no other mapping is used.
4779 *
4780 */
4781 static inline bool ixgbe_cache_ring_sriov(struct ixgbe_adapter *adapter)
4782 {
4783 adapter->rx_ring[0]->reg_idx = adapter->num_vfs * 2;
4784 adapter->tx_ring[0]->reg_idx = adapter->num_vfs * 2;
4785 if (adapter->num_vfs)
4786 return true;
4787 else
4788 return false;
4789 }
4790
4791 /**
4792 * ixgbe_cache_ring_register - Descriptor ring to register mapping
4793 * @adapter: board private structure to initialize
4794 *
4795 * Once we know the feature-set enabled for the device, we'll cache
4796 * the register offset the descriptor ring is assigned to.
4797 *
4798 * Note, the order the various feature calls is important. It must start with
4799 * the "most" features enabled at the same time, then trickle down to the
4800 * least amount of features turned on at once.
4801 **/
4802 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
4803 {
4804 /* start with default case */
4805 adapter->rx_ring[0]->reg_idx = 0;
4806 adapter->tx_ring[0]->reg_idx = 0;
4807
4808 if (ixgbe_cache_ring_sriov(adapter))
4809 return;
4810
4811 #ifdef CONFIG_IXGBE_DCB
4812 if (ixgbe_cache_ring_dcb(adapter))
4813 return;
4814 #endif
4815
4816 #ifdef IXGBE_FCOE
4817 if (ixgbe_cache_ring_fcoe(adapter))
4818 return;
4819 #endif /* IXGBE_FCOE */
4820
4821 if (ixgbe_cache_ring_fdir(adapter))
4822 return;
4823
4824 if (ixgbe_cache_ring_rss(adapter))
4825 return;
4826 }
4827
4828 /**
4829 * ixgbe_alloc_queues - Allocate memory for all rings
4830 * @adapter: board private structure to initialize
4831 *
4832 * We allocate one ring per queue at run-time since we don't know the
4833 * number of queues at compile-time. The polling_netdev array is
4834 * intended for Multiqueue, but should work fine with a single queue.
4835 **/
4836 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
4837 {
4838 int rx = 0, tx = 0, nid = adapter->node;
4839
4840 if (nid < 0 || !node_online(nid))
4841 nid = first_online_node;
4842
4843 for (; tx < adapter->num_tx_queues; tx++) {
4844 struct ixgbe_ring *ring;
4845
4846 ring = kzalloc_node(sizeof(*ring), GFP_KERNEL, nid);
4847 if (!ring)
4848 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
4849 if (!ring)
4850 goto err_allocation;
4851 ring->count = adapter->tx_ring_count;
4852 ring->queue_index = tx;
4853 ring->numa_node = nid;
4854 ring->dev = &adapter->pdev->dev;
4855 ring->netdev = adapter->netdev;
4856
4857 adapter->tx_ring[tx] = ring;
4858 }
4859
4860 for (; rx < adapter->num_rx_queues; rx++) {
4861 struct ixgbe_ring *ring;
4862
4863 ring = kzalloc_node(sizeof(*ring), GFP_KERNEL, nid);
4864 if (!ring)
4865 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
4866 if (!ring)
4867 goto err_allocation;
4868 ring->count = adapter->rx_ring_count;
4869 ring->queue_index = rx;
4870 ring->numa_node = nid;
4871 ring->dev = &adapter->pdev->dev;
4872 ring->netdev = adapter->netdev;
4873
4874 adapter->rx_ring[rx] = ring;
4875 }
4876
4877 ixgbe_cache_ring_register(adapter);
4878
4879 return 0;
4880
4881 err_allocation:
4882 while (tx)
4883 kfree(adapter->tx_ring[--tx]);
4884
4885 while (rx)
4886 kfree(adapter->rx_ring[--rx]);
4887 return -ENOMEM;
4888 }
4889
4890 /**
4891 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
4892 * @adapter: board private structure to initialize
4893 *
4894 * Attempt to configure the interrupts using the best available
4895 * capabilities of the hardware and the kernel.
4896 **/
4897 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
4898 {
4899 struct ixgbe_hw *hw = &adapter->hw;
4900 int err = 0;
4901 int vector, v_budget;
4902
4903 /*
4904 * It's easy to be greedy for MSI-X vectors, but it really
4905 * doesn't do us much good if we have a lot more vectors
4906 * than CPU's. So let's be conservative and only ask for
4907 * (roughly) the same number of vectors as there are CPU's.
4908 */
4909 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
4910 (int)num_online_cpus()) + NON_Q_VECTORS;
4911
4912 /*
4913 * At the same time, hardware can only support a maximum of
4914 * hw.mac->max_msix_vectors vectors. With features
4915 * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
4916 * descriptor queues supported by our device. Thus, we cap it off in
4917 * those rare cases where the cpu count also exceeds our vector limit.
4918 */
4919 v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
4920
4921 /* A failure in MSI-X entry allocation isn't fatal, but it does
4922 * mean we disable MSI-X capabilities of the adapter. */
4923 adapter->msix_entries = kcalloc(v_budget,
4924 sizeof(struct msix_entry), GFP_KERNEL);
4925 if (adapter->msix_entries) {
4926 for (vector = 0; vector < v_budget; vector++)
4927 adapter->msix_entries[vector].entry = vector;
4928
4929 ixgbe_acquire_msix_vectors(adapter, v_budget);
4930
4931 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4932 goto out;
4933 }
4934
4935 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
4936 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
4937 if (adapter->flags & (IXGBE_FLAG_FDIR_HASH_CAPABLE |
4938 IXGBE_FLAG_FDIR_PERFECT_CAPABLE)) {
4939 e_err(probe,
4940 "Flow Director is not supported while multiple "
4941 "queues are disabled. Disabling Flow Director\n");
4942 }
4943 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4944 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4945 adapter->atr_sample_rate = 0;
4946 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4947 ixgbe_disable_sriov(adapter);
4948
4949 err = ixgbe_set_num_queues(adapter);
4950 if (err)
4951 return err;
4952
4953 err = pci_enable_msi(adapter->pdev);
4954 if (!err) {
4955 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
4956 } else {
4957 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4958 "Unable to allocate MSI interrupt, "
4959 "falling back to legacy. Error: %d\n", err);
4960 /* reset err */
4961 err = 0;
4962 }
4963
4964 out:
4965 return err;
4966 }
4967
4968 /**
4969 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
4970 * @adapter: board private structure to initialize
4971 *
4972 * We allocate one q_vector per queue interrupt. If allocation fails we
4973 * return -ENOMEM.
4974 **/
4975 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
4976 {
4977 int q_idx, num_q_vectors;
4978 struct ixgbe_q_vector *q_vector;
4979 int (*poll)(struct napi_struct *, int);
4980
4981 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4982 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4983 poll = &ixgbe_clean_rxtx_many;
4984 } else {
4985 num_q_vectors = 1;
4986 poll = &ixgbe_poll;
4987 }
4988
4989 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4990 q_vector = kzalloc_node(sizeof(struct ixgbe_q_vector),
4991 GFP_KERNEL, adapter->node);
4992 if (!q_vector)
4993 q_vector = kzalloc(sizeof(struct ixgbe_q_vector),
4994 GFP_KERNEL);
4995 if (!q_vector)
4996 goto err_out;
4997 q_vector->adapter = adapter;
4998 if (q_vector->txr_count && !q_vector->rxr_count)
4999 q_vector->eitr = adapter->tx_eitr_param;
5000 else
5001 q_vector->eitr = adapter->rx_eitr_param;
5002 q_vector->v_idx = q_idx;
5003 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
5004 adapter->q_vector[q_idx] = q_vector;
5005 }
5006
5007 return 0;
5008
5009 err_out:
5010 while (q_idx) {
5011 q_idx--;
5012 q_vector = adapter->q_vector[q_idx];
5013 netif_napi_del(&q_vector->napi);
5014 kfree(q_vector);
5015 adapter->q_vector[q_idx] = NULL;
5016 }
5017 return -ENOMEM;
5018 }
5019
5020 /**
5021 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
5022 * @adapter: board private structure to initialize
5023 *
5024 * This function frees the memory allocated to the q_vectors. In addition if
5025 * NAPI is enabled it will delete any references to the NAPI struct prior
5026 * to freeing the q_vector.
5027 **/
5028 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
5029 {
5030 int q_idx, num_q_vectors;
5031
5032 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
5033 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
5034 else
5035 num_q_vectors = 1;
5036
5037 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
5038 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
5039 adapter->q_vector[q_idx] = NULL;
5040 netif_napi_del(&q_vector->napi);
5041 kfree(q_vector);
5042 }
5043 }
5044
5045 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
5046 {
5047 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
5048 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
5049 pci_disable_msix(adapter->pdev);
5050 kfree(adapter->msix_entries);
5051 adapter->msix_entries = NULL;
5052 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
5053 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
5054 pci_disable_msi(adapter->pdev);
5055 }
5056 }
5057
5058 /**
5059 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
5060 * @adapter: board private structure to initialize
5061 *
5062 * We determine which interrupt scheme to use based on...
5063 * - Kernel support (MSI, MSI-X)
5064 * - which can be user-defined (via MODULE_PARAM)
5065 * - Hardware queue count (num_*_queues)
5066 * - defined by miscellaneous hardware support/features (RSS, etc.)
5067 **/
5068 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
5069 {
5070 int err;
5071
5072 /* Number of supported queues */
5073 err = ixgbe_set_num_queues(adapter);
5074 if (err)
5075 return err;
5076
5077 err = ixgbe_set_interrupt_capability(adapter);
5078 if (err) {
5079 e_dev_err("Unable to setup interrupt capabilities\n");
5080 goto err_set_interrupt;
5081 }
5082
5083 err = ixgbe_alloc_q_vectors(adapter);
5084 if (err) {
5085 e_dev_err("Unable to allocate memory for queue vectors\n");
5086 goto err_alloc_q_vectors;
5087 }
5088
5089 err = ixgbe_alloc_queues(adapter);
5090 if (err) {
5091 e_dev_err("Unable to allocate memory for queues\n");
5092 goto err_alloc_queues;
5093 }
5094
5095 e_dev_info("Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u\n",
5096 (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
5097 adapter->num_rx_queues, adapter->num_tx_queues);
5098
5099 set_bit(__IXGBE_DOWN, &adapter->state);
5100
5101 return 0;
5102
5103 err_alloc_queues:
5104 ixgbe_free_q_vectors(adapter);
5105 err_alloc_q_vectors:
5106 ixgbe_reset_interrupt_capability(adapter);
5107 err_set_interrupt:
5108 return err;
5109 }
5110
5111 /**
5112 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
5113 * @adapter: board private structure to clear interrupt scheme on
5114 *
5115 * We go through and clear interrupt specific resources and reset the structure
5116 * to pre-load conditions
5117 **/
5118 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
5119 {
5120 int i;
5121
5122 for (i = 0; i < adapter->num_tx_queues; i++) {
5123 kfree(adapter->tx_ring[i]);
5124 adapter->tx_ring[i] = NULL;
5125 }
5126 for (i = 0; i < adapter->num_rx_queues; i++) {
5127 struct ixgbe_ring *ring = adapter->rx_ring[i];
5128
5129 /* ixgbe_get_stats64() might access this ring, we must wait
5130 * a grace period before freeing it.
5131 */
5132 kfree_rcu(ring, rcu);
5133 adapter->rx_ring[i] = NULL;
5134 }
5135
5136 adapter->num_tx_queues = 0;
5137 adapter->num_rx_queues = 0;
5138
5139 ixgbe_free_q_vectors(adapter);
5140 ixgbe_reset_interrupt_capability(adapter);
5141 }
5142
5143 /**
5144 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
5145 * @adapter: board private structure to initialize
5146 *
5147 * ixgbe_sw_init initializes the Adapter private data structure.
5148 * Fields are initialized based on PCI device information and
5149 * OS network device settings (MTU size).
5150 **/
5151 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
5152 {
5153 struct ixgbe_hw *hw = &adapter->hw;
5154 struct pci_dev *pdev = adapter->pdev;
5155 struct net_device *dev = adapter->netdev;
5156 unsigned int rss;
5157 #ifdef CONFIG_IXGBE_DCB
5158 int j;
5159 struct tc_configuration *tc;
5160 #endif
5161 int max_frame = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
5162
5163 /* PCI config space info */
5164
5165 hw->vendor_id = pdev->vendor;
5166 hw->device_id = pdev->device;
5167 hw->revision_id = pdev->revision;
5168 hw->subsystem_vendor_id = pdev->subsystem_vendor;
5169 hw->subsystem_device_id = pdev->subsystem_device;
5170
5171 /* Set capability flags */
5172 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
5173 adapter->ring_feature[RING_F_RSS].indices = rss;
5174 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
5175 switch (hw->mac.type) {
5176 case ixgbe_mac_82598EB:
5177 if (hw->device_id == IXGBE_DEV_ID_82598AT)
5178 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
5179 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
5180 break;
5181 case ixgbe_mac_82599EB:
5182 case ixgbe_mac_X540:
5183 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
5184 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
5185 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
5186 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
5187 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
5188 /* n-tuple support exists, always init our spinlock */
5189 spin_lock_init(&adapter->fdir_perfect_lock);
5190 /* Flow Director hash filters enabled */
5191 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
5192 adapter->atr_sample_rate = 20;
5193 adapter->ring_feature[RING_F_FDIR].indices =
5194 IXGBE_MAX_FDIR_INDICES;
5195 adapter->fdir_pballoc = 0;
5196 #ifdef IXGBE_FCOE
5197 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
5198 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
5199 adapter->ring_feature[RING_F_FCOE].indices = 0;
5200 #ifdef CONFIG_IXGBE_DCB
5201 /* Default traffic class to use for FCoE */
5202 adapter->fcoe.tc = IXGBE_FCOE_DEFTC;
5203 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
5204 #endif
5205 #endif /* IXGBE_FCOE */
5206 break;
5207 default:
5208 break;
5209 }
5210
5211 #ifdef CONFIG_IXGBE_DCB
5212 /* Configure DCB traffic classes */
5213 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
5214 tc = &adapter->dcb_cfg.tc_config[j];
5215 tc->path[DCB_TX_CONFIG].bwg_id = 0;
5216 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
5217 tc->path[DCB_RX_CONFIG].bwg_id = 0;
5218 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
5219 tc->dcb_pfc = pfc_disabled;
5220 }
5221 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
5222 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
5223 adapter->dcb_cfg.pfc_mode_enable = false;
5224 adapter->dcb_set_bitmap = 0x00;
5225 adapter->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE;
5226 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
5227 MAX_TRAFFIC_CLASS);
5228
5229 #endif
5230
5231 /* default flow control settings */
5232 hw->fc.requested_mode = ixgbe_fc_full;
5233 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
5234 #ifdef CONFIG_DCB
5235 adapter->last_lfc_mode = hw->fc.current_mode;
5236 #endif
5237 hw->fc.high_water = FC_HIGH_WATER(max_frame);
5238 hw->fc.low_water = FC_LOW_WATER(max_frame);
5239 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
5240 hw->fc.send_xon = true;
5241 hw->fc.disable_fc_autoneg = false;
5242
5243 /* enable itr by default in dynamic mode */
5244 adapter->rx_itr_setting = 1;
5245 adapter->rx_eitr_param = 20000;
5246 adapter->tx_itr_setting = 1;
5247 adapter->tx_eitr_param = 10000;
5248
5249 /* set defaults for eitr in MegaBytes */
5250 adapter->eitr_low = 10;
5251 adapter->eitr_high = 20;
5252
5253 /* set default ring sizes */
5254 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
5255 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
5256
5257 /* initialize eeprom parameters */
5258 if (ixgbe_init_eeprom_params_generic(hw)) {
5259 e_dev_err("EEPROM initialization failed\n");
5260 return -EIO;
5261 }
5262
5263 /* enable rx csum by default */
5264 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
5265
5266 /* get assigned NUMA node */
5267 adapter->node = dev_to_node(&pdev->dev);
5268
5269 set_bit(__IXGBE_DOWN, &adapter->state);
5270
5271 return 0;
5272 }
5273
5274 /**
5275 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
5276 * @tx_ring: tx descriptor ring (for a specific queue) to setup
5277 *
5278 * Return 0 on success, negative on failure
5279 **/
5280 int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
5281 {
5282 struct device *dev = tx_ring->dev;
5283 int size;
5284
5285 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
5286 tx_ring->tx_buffer_info = vzalloc_node(size, tx_ring->numa_node);
5287 if (!tx_ring->tx_buffer_info)
5288 tx_ring->tx_buffer_info = vzalloc(size);
5289 if (!tx_ring->tx_buffer_info)
5290 goto err;
5291
5292 /* round up to nearest 4K */
5293 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
5294 tx_ring->size = ALIGN(tx_ring->size, 4096);
5295
5296 tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
5297 &tx_ring->dma, GFP_KERNEL);
5298 if (!tx_ring->desc)
5299 goto err;
5300
5301 tx_ring->next_to_use = 0;
5302 tx_ring->next_to_clean = 0;
5303 tx_ring->work_limit = tx_ring->count;
5304 return 0;
5305
5306 err:
5307 vfree(tx_ring->tx_buffer_info);
5308 tx_ring->tx_buffer_info = NULL;
5309 dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n");
5310 return -ENOMEM;
5311 }
5312
5313 /**
5314 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
5315 * @adapter: board private structure
5316 *
5317 * If this function returns with an error, then it's possible one or
5318 * more of the rings is populated (while the rest are not). It is the
5319 * callers duty to clean those orphaned rings.
5320 *
5321 * Return 0 on success, negative on failure
5322 **/
5323 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
5324 {
5325 int i, err = 0;
5326
5327 for (i = 0; i < adapter->num_tx_queues; i++) {
5328 err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
5329 if (!err)
5330 continue;
5331 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
5332 break;
5333 }
5334
5335 return err;
5336 }
5337
5338 /**
5339 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
5340 * @rx_ring: rx descriptor ring (for a specific queue) to setup
5341 *
5342 * Returns 0 on success, negative on failure
5343 **/
5344 int ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring)
5345 {
5346 struct device *dev = rx_ring->dev;
5347 int size;
5348
5349 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
5350 rx_ring->rx_buffer_info = vzalloc_node(size, rx_ring->numa_node);
5351 if (!rx_ring->rx_buffer_info)
5352 rx_ring->rx_buffer_info = vzalloc(size);
5353 if (!rx_ring->rx_buffer_info)
5354 goto err;
5355
5356 /* Round up to nearest 4K */
5357 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
5358 rx_ring->size = ALIGN(rx_ring->size, 4096);
5359
5360 rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
5361 &rx_ring->dma, GFP_KERNEL);
5362
5363 if (!rx_ring->desc)
5364 goto err;
5365
5366 rx_ring->next_to_clean = 0;
5367 rx_ring->next_to_use = 0;
5368
5369 return 0;
5370 err:
5371 vfree(rx_ring->rx_buffer_info);
5372 rx_ring->rx_buffer_info = NULL;
5373 dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");
5374 return -ENOMEM;
5375 }
5376
5377 /**
5378 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
5379 * @adapter: board private structure
5380 *
5381 * If this function returns with an error, then it's possible one or
5382 * more of the rings is populated (while the rest are not). It is the
5383 * callers duty to clean those orphaned rings.
5384 *
5385 * Return 0 on success, negative on failure
5386 **/
5387 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
5388 {
5389 int i, err = 0;
5390
5391 for (i = 0; i < adapter->num_rx_queues; i++) {
5392 err = ixgbe_setup_rx_resources(adapter->rx_ring[i]);
5393 if (!err)
5394 continue;
5395 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
5396 break;
5397 }
5398
5399 return err;
5400 }
5401
5402 /**
5403 * ixgbe_free_tx_resources - Free Tx Resources per Queue
5404 * @tx_ring: Tx descriptor ring for a specific queue
5405 *
5406 * Free all transmit software resources
5407 **/
5408 void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring)
5409 {
5410 ixgbe_clean_tx_ring(tx_ring);
5411
5412 vfree(tx_ring->tx_buffer_info);
5413 tx_ring->tx_buffer_info = NULL;
5414
5415 /* if not set, then don't free */
5416 if (!tx_ring->desc)
5417 return;
5418
5419 dma_free_coherent(tx_ring->dev, tx_ring->size,
5420 tx_ring->desc, tx_ring->dma);
5421
5422 tx_ring->desc = NULL;
5423 }
5424
5425 /**
5426 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
5427 * @adapter: board private structure
5428 *
5429 * Free all transmit software resources
5430 **/
5431 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
5432 {
5433 int i;
5434
5435 for (i = 0; i < adapter->num_tx_queues; i++)
5436 if (adapter->tx_ring[i]->desc)
5437 ixgbe_free_tx_resources(adapter->tx_ring[i]);
5438 }
5439
5440 /**
5441 * ixgbe_free_rx_resources - Free Rx Resources
5442 * @rx_ring: ring to clean the resources from
5443 *
5444 * Free all receive software resources
5445 **/
5446 void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring)
5447 {
5448 ixgbe_clean_rx_ring(rx_ring);
5449
5450 vfree(rx_ring->rx_buffer_info);
5451 rx_ring->rx_buffer_info = NULL;
5452
5453 /* if not set, then don't free */
5454 if (!rx_ring->desc)
5455 return;
5456
5457 dma_free_coherent(rx_ring->dev, rx_ring->size,
5458 rx_ring->desc, rx_ring->dma);
5459
5460 rx_ring->desc = NULL;
5461 }
5462
5463 /**
5464 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
5465 * @adapter: board private structure
5466 *
5467 * Free all receive software resources
5468 **/
5469 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
5470 {
5471 int i;
5472
5473 for (i = 0; i < adapter->num_rx_queues; i++)
5474 if (adapter->rx_ring[i]->desc)
5475 ixgbe_free_rx_resources(adapter->rx_ring[i]);
5476 }
5477
5478 /**
5479 * ixgbe_change_mtu - Change the Maximum Transfer Unit
5480 * @netdev: network interface device structure
5481 * @new_mtu: new value for maximum frame size
5482 *
5483 * Returns 0 on success, negative on failure
5484 **/
5485 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
5486 {
5487 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5488 struct ixgbe_hw *hw = &adapter->hw;
5489 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5490
5491 /* MTU < 68 is an error and causes problems on some kernels */
5492 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED &&
5493 hw->mac.type != ixgbe_mac_X540) {
5494 if ((new_mtu < 68) || (max_frame > MAXIMUM_ETHERNET_VLAN_SIZE))
5495 return -EINVAL;
5496 } else {
5497 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
5498 return -EINVAL;
5499 }
5500
5501 e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5502 /* must set new MTU before calling down or up */
5503 netdev->mtu = new_mtu;
5504
5505 hw->fc.high_water = FC_HIGH_WATER(max_frame);
5506 hw->fc.low_water = FC_LOW_WATER(max_frame);
5507
5508 if (netif_running(netdev))
5509 ixgbe_reinit_locked(adapter);
5510
5511 return 0;
5512 }
5513
5514 /**
5515 * ixgbe_open - Called when a network interface is made active
5516 * @netdev: network interface device structure
5517 *
5518 * Returns 0 on success, negative value on failure
5519 *
5520 * The open entry point is called when a network interface is made
5521 * active by the system (IFF_UP). At this point all resources needed
5522 * for transmit and receive operations are allocated, the interrupt
5523 * handler is registered with the OS, the watchdog timer is started,
5524 * and the stack is notified that the interface is ready.
5525 **/
5526 static int ixgbe_open(struct net_device *netdev)
5527 {
5528 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5529 int err;
5530
5531 /* disallow open during test */
5532 if (test_bit(__IXGBE_TESTING, &adapter->state))
5533 return -EBUSY;
5534
5535 netif_carrier_off(netdev);
5536
5537 /* allocate transmit descriptors */
5538 err = ixgbe_setup_all_tx_resources(adapter);
5539 if (err)
5540 goto err_setup_tx;
5541
5542 /* allocate receive descriptors */
5543 err = ixgbe_setup_all_rx_resources(adapter);
5544 if (err)
5545 goto err_setup_rx;
5546
5547 ixgbe_configure(adapter);
5548
5549 err = ixgbe_request_irq(adapter);
5550 if (err)
5551 goto err_req_irq;
5552
5553 err = ixgbe_up_complete(adapter);
5554 if (err)
5555 goto err_up;
5556
5557 netif_tx_start_all_queues(netdev);
5558
5559 return 0;
5560
5561 err_up:
5562 ixgbe_release_hw_control(adapter);
5563 ixgbe_free_irq(adapter);
5564 err_req_irq:
5565 err_setup_rx:
5566 ixgbe_free_all_rx_resources(adapter);
5567 err_setup_tx:
5568 ixgbe_free_all_tx_resources(adapter);
5569 ixgbe_reset(adapter);
5570
5571 return err;
5572 }
5573
5574 /**
5575 * ixgbe_close - Disables a network interface
5576 * @netdev: network interface device structure
5577 *
5578 * Returns 0, this is not allowed to fail
5579 *
5580 * The close entry point is called when an interface is de-activated
5581 * by the OS. The hardware is still under the drivers control, but
5582 * needs to be disabled. A global MAC reset is issued to stop the
5583 * hardware, and all transmit and receive resources are freed.
5584 **/
5585 static int ixgbe_close(struct net_device *netdev)
5586 {
5587 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5588
5589 ixgbe_down(adapter);
5590 ixgbe_free_irq(adapter);
5591
5592 ixgbe_free_all_tx_resources(adapter);
5593 ixgbe_free_all_rx_resources(adapter);
5594
5595 ixgbe_release_hw_control(adapter);
5596
5597 return 0;
5598 }
5599
5600 #ifdef CONFIG_PM
5601 static int ixgbe_resume(struct pci_dev *pdev)
5602 {
5603 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5604 struct net_device *netdev = adapter->netdev;
5605 u32 err;
5606
5607 pci_set_power_state(pdev, PCI_D0);
5608 pci_restore_state(pdev);
5609 /*
5610 * pci_restore_state clears dev->state_saved so call
5611 * pci_save_state to restore it.
5612 */
5613 pci_save_state(pdev);
5614
5615 err = pci_enable_device_mem(pdev);
5616 if (err) {
5617 e_dev_err("Cannot enable PCI device from suspend\n");
5618 return err;
5619 }
5620 pci_set_master(pdev);
5621
5622 pci_wake_from_d3(pdev, false);
5623
5624 err = ixgbe_init_interrupt_scheme(adapter);
5625 if (err) {
5626 e_dev_err("Cannot initialize interrupts for device\n");
5627 return err;
5628 }
5629
5630 ixgbe_reset(adapter);
5631
5632 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5633
5634 if (netif_running(netdev)) {
5635 err = ixgbe_open(netdev);
5636 if (err)
5637 return err;
5638 }
5639
5640 netif_device_attach(netdev);
5641
5642 return 0;
5643 }
5644 #endif /* CONFIG_PM */
5645
5646 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
5647 {
5648 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5649 struct net_device *netdev = adapter->netdev;
5650 struct ixgbe_hw *hw = &adapter->hw;
5651 u32 ctrl, fctrl;
5652 u32 wufc = adapter->wol;
5653 #ifdef CONFIG_PM
5654 int retval = 0;
5655 #endif
5656
5657 netif_device_detach(netdev);
5658
5659 if (netif_running(netdev)) {
5660 ixgbe_down(adapter);
5661 ixgbe_free_irq(adapter);
5662 ixgbe_free_all_tx_resources(adapter);
5663 ixgbe_free_all_rx_resources(adapter);
5664 }
5665
5666 ixgbe_clear_interrupt_scheme(adapter);
5667 #ifdef CONFIG_DCB
5668 kfree(adapter->ixgbe_ieee_pfc);
5669 kfree(adapter->ixgbe_ieee_ets);
5670 #endif
5671
5672 #ifdef CONFIG_PM
5673 retval = pci_save_state(pdev);
5674 if (retval)
5675 return retval;
5676
5677 #endif
5678 if (wufc) {
5679 ixgbe_set_rx_mode(netdev);
5680
5681 /* turn on all-multi mode if wake on multicast is enabled */
5682 if (wufc & IXGBE_WUFC_MC) {
5683 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5684 fctrl |= IXGBE_FCTRL_MPE;
5685 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
5686 }
5687
5688 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
5689 ctrl |= IXGBE_CTRL_GIO_DIS;
5690 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
5691
5692 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
5693 } else {
5694 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
5695 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
5696 }
5697
5698 switch (hw->mac.type) {
5699 case ixgbe_mac_82598EB:
5700 pci_wake_from_d3(pdev, false);
5701 break;
5702 case ixgbe_mac_82599EB:
5703 case ixgbe_mac_X540:
5704 pci_wake_from_d3(pdev, !!wufc);
5705 break;
5706 default:
5707 break;
5708 }
5709
5710 *enable_wake = !!wufc;
5711
5712 ixgbe_release_hw_control(adapter);
5713
5714 pci_disable_device(pdev);
5715
5716 return 0;
5717 }
5718
5719 #ifdef CONFIG_PM
5720 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
5721 {
5722 int retval;
5723 bool wake;
5724
5725 retval = __ixgbe_shutdown(pdev, &wake);
5726 if (retval)
5727 return retval;
5728
5729 if (wake) {
5730 pci_prepare_to_sleep(pdev);
5731 } else {
5732 pci_wake_from_d3(pdev, false);
5733 pci_set_power_state(pdev, PCI_D3hot);
5734 }
5735
5736 return 0;
5737 }
5738 #endif /* CONFIG_PM */
5739
5740 static void ixgbe_shutdown(struct pci_dev *pdev)
5741 {
5742 bool wake;
5743
5744 __ixgbe_shutdown(pdev, &wake);
5745
5746 if (system_state == SYSTEM_POWER_OFF) {
5747 pci_wake_from_d3(pdev, wake);
5748 pci_set_power_state(pdev, PCI_D3hot);
5749 }
5750 }
5751
5752 /**
5753 * ixgbe_update_stats - Update the board statistics counters.
5754 * @adapter: board private structure
5755 **/
5756 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
5757 {
5758 struct net_device *netdev = adapter->netdev;
5759 struct ixgbe_hw *hw = &adapter->hw;
5760 struct ixgbe_hw_stats *hwstats = &adapter->stats;
5761 u64 total_mpc = 0;
5762 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
5763 u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
5764 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
5765 u64 bytes = 0, packets = 0;
5766
5767 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5768 test_bit(__IXGBE_RESETTING, &adapter->state))
5769 return;
5770
5771 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
5772 u64 rsc_count = 0;
5773 u64 rsc_flush = 0;
5774 for (i = 0; i < 16; i++)
5775 adapter->hw_rx_no_dma_resources +=
5776 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5777 for (i = 0; i < adapter->num_rx_queues; i++) {
5778 rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
5779 rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
5780 }
5781 adapter->rsc_total_count = rsc_count;
5782 adapter->rsc_total_flush = rsc_flush;
5783 }
5784
5785 for (i = 0; i < adapter->num_rx_queues; i++) {
5786 struct ixgbe_ring *rx_ring = adapter->rx_ring[i];
5787 non_eop_descs += rx_ring->rx_stats.non_eop_descs;
5788 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
5789 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
5790 bytes += rx_ring->stats.bytes;
5791 packets += rx_ring->stats.packets;
5792 }
5793 adapter->non_eop_descs = non_eop_descs;
5794 adapter->alloc_rx_page_failed = alloc_rx_page_failed;
5795 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
5796 netdev->stats.rx_bytes = bytes;
5797 netdev->stats.rx_packets = packets;
5798
5799 bytes = 0;
5800 packets = 0;
5801 /* gather some stats to the adapter struct that are per queue */
5802 for (i = 0; i < adapter->num_tx_queues; i++) {
5803 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
5804 restart_queue += tx_ring->tx_stats.restart_queue;
5805 tx_busy += tx_ring->tx_stats.tx_busy;
5806 bytes += tx_ring->stats.bytes;
5807 packets += tx_ring->stats.packets;
5808 }
5809 adapter->restart_queue = restart_queue;
5810 adapter->tx_busy = tx_busy;
5811 netdev->stats.tx_bytes = bytes;
5812 netdev->stats.tx_packets = packets;
5813
5814 hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
5815 for (i = 0; i < 8; i++) {
5816 /* for packet buffers not used, the register should read 0 */
5817 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
5818 missed_rx += mpc;
5819 hwstats->mpc[i] += mpc;
5820 total_mpc += hwstats->mpc[i];
5821 if (hw->mac.type == ixgbe_mac_82598EB)
5822 hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
5823 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
5824 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
5825 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
5826 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
5827 switch (hw->mac.type) {
5828 case ixgbe_mac_82598EB:
5829 hwstats->pxonrxc[i] +=
5830 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
5831 break;
5832 case ixgbe_mac_82599EB:
5833 case ixgbe_mac_X540:
5834 hwstats->pxonrxc[i] +=
5835 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
5836 break;
5837 default:
5838 break;
5839 }
5840 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
5841 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
5842 }
5843 hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
5844 /* work around hardware counting issue */
5845 hwstats->gprc -= missed_rx;
5846
5847 ixgbe_update_xoff_received(adapter);
5848
5849 /* 82598 hardware only has a 32 bit counter in the high register */
5850 switch (hw->mac.type) {
5851 case ixgbe_mac_82598EB:
5852 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
5853 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
5854 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
5855 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
5856 break;
5857 case ixgbe_mac_X540:
5858 /* OS2BMC stats are X540 only*/
5859 hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC);
5860 hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC);
5861 hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC);
5862 hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC);
5863 case ixgbe_mac_82599EB:
5864 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
5865 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
5866 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
5867 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
5868 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
5869 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
5870 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
5871 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
5872 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
5873 #ifdef IXGBE_FCOE
5874 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
5875 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
5876 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
5877 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
5878 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
5879 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
5880 #endif /* IXGBE_FCOE */
5881 break;
5882 default:
5883 break;
5884 }
5885 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
5886 hwstats->bprc += bprc;
5887 hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
5888 if (hw->mac.type == ixgbe_mac_82598EB)
5889 hwstats->mprc -= bprc;
5890 hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
5891 hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
5892 hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
5893 hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
5894 hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
5895 hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
5896 hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
5897 hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
5898 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
5899 hwstats->lxontxc += lxon;
5900 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
5901 hwstats->lxofftxc += lxoff;
5902 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5903 hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
5904 hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
5905 /*
5906 * 82598 errata - tx of flow control packets is included in tx counters
5907 */
5908 xon_off_tot = lxon + lxoff;
5909 hwstats->gptc -= xon_off_tot;
5910 hwstats->mptc -= xon_off_tot;
5911 hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
5912 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5913 hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
5914 hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
5915 hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
5916 hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
5917 hwstats->ptc64 -= xon_off_tot;
5918 hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
5919 hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
5920 hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
5921 hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
5922 hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
5923 hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
5924
5925 /* Fill out the OS statistics structure */
5926 netdev->stats.multicast = hwstats->mprc;
5927
5928 /* Rx Errors */
5929 netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
5930 netdev->stats.rx_dropped = 0;
5931 netdev->stats.rx_length_errors = hwstats->rlec;
5932 netdev->stats.rx_crc_errors = hwstats->crcerrs;
5933 netdev->stats.rx_missed_errors = total_mpc;
5934 }
5935
5936 /**
5937 * ixgbe_fdir_reinit_subtask - worker thread to reinit FDIR filter table
5938 * @adapter - pointer to the device adapter structure
5939 **/
5940 static void ixgbe_fdir_reinit_subtask(struct ixgbe_adapter *adapter)
5941 {
5942 struct ixgbe_hw *hw = &adapter->hw;
5943 int i;
5944
5945 if (!(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
5946 return;
5947
5948 adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
5949
5950 /* if interface is down do nothing */
5951 if (test_bit(__IXGBE_DOWN, &adapter->state))
5952 return;
5953
5954 /* do nothing if we are not using signature filters */
5955 if (!(adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE))
5956 return;
5957
5958 adapter->fdir_overflow++;
5959
5960 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
5961 for (i = 0; i < adapter->num_tx_queues; i++)
5962 set_bit(__IXGBE_TX_FDIR_INIT_DONE,
5963 &(adapter->tx_ring[i]->state));
5964 /* re-enable flow director interrupts */
5965 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
5966 } else {
5967 e_err(probe, "failed to finish FDIR re-initialization, "
5968 "ignored adding FDIR ATR filters\n");
5969 }
5970 }
5971
5972 /**
5973 * ixgbe_check_hang_subtask - check for hung queues and dropped interrupts
5974 * @adapter - pointer to the device adapter structure
5975 *
5976 * This function serves two purposes. First it strobes the interrupt lines
5977 * in order to make certain interrupts are occuring. Secondly it sets the
5978 * bits needed to check for TX hangs. As a result we should immediately
5979 * determine if a hang has occured.
5980 */
5981 static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter)
5982 {
5983 struct ixgbe_hw *hw = &adapter->hw;
5984 u64 eics = 0;
5985 int i;
5986
5987 /* If we're down or resetting, just bail */
5988 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5989 test_bit(__IXGBE_RESETTING, &adapter->state))
5990 return;
5991
5992 /* Force detection of hung controller */
5993 if (netif_carrier_ok(adapter->netdev)) {
5994 for (i = 0; i < adapter->num_tx_queues; i++)
5995 set_check_for_tx_hang(adapter->tx_ring[i]);
5996 }
5997
5998 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
5999 /*
6000 * for legacy and MSI interrupts don't set any bits
6001 * that are enabled for EIAM, because this operation
6002 * would set *both* EIMS and EICS for any bit in EIAM
6003 */
6004 IXGBE_WRITE_REG(hw, IXGBE_EICS,
6005 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
6006 } else {
6007 /* get one bit for every active tx/rx interrupt vector */
6008 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
6009 struct ixgbe_q_vector *qv = adapter->q_vector[i];
6010 if (qv->rxr_count || qv->txr_count)
6011 eics |= ((u64)1 << i);
6012 }
6013 }
6014
6015 /* Cause software interrupt to ensure rings are cleaned */
6016 ixgbe_irq_rearm_queues(adapter, eics);
6017
6018 }
6019
6020 /**
6021 * ixgbe_watchdog_update_link - update the link status
6022 * @adapter - pointer to the device adapter structure
6023 * @link_speed - pointer to a u32 to store the link_speed
6024 **/
6025 static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter)
6026 {
6027 struct ixgbe_hw *hw = &adapter->hw;
6028 u32 link_speed = adapter->link_speed;
6029 bool link_up = adapter->link_up;
6030 int i;
6031
6032 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
6033 return;
6034
6035 if (hw->mac.ops.check_link) {
6036 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
6037 } else {
6038 /* always assume link is up, if no check link function */
6039 link_speed = IXGBE_LINK_SPEED_10GB_FULL;
6040 link_up = true;
6041 }
6042 if (link_up) {
6043 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6044 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
6045 hw->mac.ops.fc_enable(hw, i);
6046 } else {
6047 hw->mac.ops.fc_enable(hw, 0);
6048 }
6049 }
6050
6051 if (link_up ||
6052 time_after(jiffies, (adapter->link_check_timeout +
6053 IXGBE_TRY_LINK_TIMEOUT))) {
6054 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
6055 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
6056 IXGBE_WRITE_FLUSH(hw);
6057 }
6058
6059 adapter->link_up = link_up;
6060 adapter->link_speed = link_speed;
6061 }
6062
6063 /**
6064 * ixgbe_watchdog_link_is_up - update netif_carrier status and
6065 * print link up message
6066 * @adapter - pointer to the device adapter structure
6067 **/
6068 static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
6069 {
6070 struct net_device *netdev = adapter->netdev;
6071 struct ixgbe_hw *hw = &adapter->hw;
6072 u32 link_speed = adapter->link_speed;
6073 bool flow_rx, flow_tx;
6074
6075 /* only continue if link was previously down */
6076 if (netif_carrier_ok(netdev))
6077 return;
6078
6079 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
6080
6081 switch (hw->mac.type) {
6082 case ixgbe_mac_82598EB: {
6083 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
6084 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
6085 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
6086 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
6087 }
6088 break;
6089 case ixgbe_mac_X540:
6090 case ixgbe_mac_82599EB: {
6091 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
6092 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
6093 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
6094 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
6095 }
6096 break;
6097 default:
6098 flow_tx = false;
6099 flow_rx = false;
6100 break;
6101 }
6102 e_info(drv, "NIC Link is Up %s, Flow Control: %s\n",
6103 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
6104 "10 Gbps" :
6105 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
6106 "1 Gbps" :
6107 (link_speed == IXGBE_LINK_SPEED_100_FULL ?
6108 "100 Mbps" :
6109 "unknown speed"))),
6110 ((flow_rx && flow_tx) ? "RX/TX" :
6111 (flow_rx ? "RX" :
6112 (flow_tx ? "TX" : "None"))));
6113
6114 netif_carrier_on(netdev);
6115 #ifdef HAVE_IPLINK_VF_CONFIG
6116 ixgbe_check_vf_rate_limit(adapter);
6117 #endif /* HAVE_IPLINK_VF_CONFIG */
6118 }
6119
6120 /**
6121 * ixgbe_watchdog_link_is_down - update netif_carrier status and
6122 * print link down message
6123 * @adapter - pointer to the adapter structure
6124 **/
6125 static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter* adapter)
6126 {
6127 struct net_device *netdev = adapter->netdev;
6128 struct ixgbe_hw *hw = &adapter->hw;
6129
6130 adapter->link_up = false;
6131 adapter->link_speed = 0;
6132
6133 /* only continue if link was up previously */
6134 if (!netif_carrier_ok(netdev))
6135 return;
6136
6137 /* poll for SFP+ cable when link is down */
6138 if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB)
6139 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
6140
6141 e_info(drv, "NIC Link is Down\n");
6142 netif_carrier_off(netdev);
6143 }
6144
6145 /**
6146 * ixgbe_watchdog_flush_tx - flush queues on link down
6147 * @adapter - pointer to the device adapter structure
6148 **/
6149 static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter)
6150 {
6151 int i;
6152 int some_tx_pending = 0;
6153
6154 if (!netif_carrier_ok(adapter->netdev)) {
6155 for (i = 0; i < adapter->num_tx_queues; i++) {
6156 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
6157 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
6158 some_tx_pending = 1;
6159 break;
6160 }
6161 }
6162
6163 if (some_tx_pending) {
6164 /* We've lost link, so the controller stops DMA,
6165 * but we've got queued Tx work that's never going
6166 * to get done, so reset controller to flush Tx.
6167 * (Do the reset outside of interrupt context).
6168 */
6169 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
6170 }
6171 }
6172 }
6173
6174 static void ixgbe_spoof_check(struct ixgbe_adapter *adapter)
6175 {
6176 u32 ssvpc;
6177
6178 /* Do not perform spoof check for 82598 */
6179 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
6180 return;
6181
6182 ssvpc = IXGBE_READ_REG(&adapter->hw, IXGBE_SSVPC);
6183
6184 /*
6185 * ssvpc register is cleared on read, if zero then no
6186 * spoofed packets in the last interval.
6187 */
6188 if (!ssvpc)
6189 return;
6190
6191 e_warn(drv, "%d Spoofed packets detected\n", ssvpc);
6192 }
6193
6194 /**
6195 * ixgbe_watchdog_subtask - check and bring link up
6196 * @adapter - pointer to the device adapter structure
6197 **/
6198 static void ixgbe_watchdog_subtask(struct ixgbe_adapter *adapter)
6199 {
6200 /* if interface is down do nothing */
6201 if (test_bit(__IXGBE_DOWN, &adapter->state))
6202 return;
6203
6204 ixgbe_watchdog_update_link(adapter);
6205
6206 if (adapter->link_up)
6207 ixgbe_watchdog_link_is_up(adapter);
6208 else
6209 ixgbe_watchdog_link_is_down(adapter);
6210
6211 ixgbe_spoof_check(adapter);
6212 ixgbe_update_stats(adapter);
6213
6214 ixgbe_watchdog_flush_tx(adapter);
6215 }
6216
6217 /**
6218 * ixgbe_sfp_detection_subtask - poll for SFP+ cable
6219 * @adapter - the ixgbe adapter structure
6220 **/
6221 static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter)
6222 {
6223 struct ixgbe_hw *hw = &adapter->hw;
6224 s32 err;
6225
6226 /* not searching for SFP so there is nothing to do here */
6227 if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) &&
6228 !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
6229 return;
6230
6231 /* someone else is in init, wait until next service event */
6232 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
6233 return;
6234
6235 err = hw->phy.ops.identify_sfp(hw);
6236 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
6237 goto sfp_out;
6238
6239 if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
6240 /* If no cable is present, then we need to reset
6241 * the next time we find a good cable. */
6242 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
6243 }
6244
6245 /* exit on error */
6246 if (err)
6247 goto sfp_out;
6248
6249 /* exit if reset not needed */
6250 if (!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
6251 goto sfp_out;
6252
6253 adapter->flags2 &= ~IXGBE_FLAG2_SFP_NEEDS_RESET;
6254
6255 /*
6256 * A module may be identified correctly, but the EEPROM may not have
6257 * support for that module. setup_sfp() will fail in that case, so
6258 * we should not allow that module to load.
6259 */
6260 if (hw->mac.type == ixgbe_mac_82598EB)
6261 err = hw->phy.ops.reset(hw);
6262 else
6263 err = hw->mac.ops.setup_sfp(hw);
6264
6265 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
6266 goto sfp_out;
6267
6268 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
6269 e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
6270
6271 sfp_out:
6272 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
6273
6274 if ((err == IXGBE_ERR_SFP_NOT_SUPPORTED) &&
6275 (adapter->netdev->reg_state == NETREG_REGISTERED)) {
6276 e_dev_err("failed to initialize because an unsupported "
6277 "SFP+ module type was detected.\n");
6278 e_dev_err("Reload the driver after installing a "
6279 "supported module.\n");
6280 unregister_netdev(adapter->netdev);
6281 }
6282 }
6283
6284 /**
6285 * ixgbe_sfp_link_config_subtask - set up link SFP after module install
6286 * @adapter - the ixgbe adapter structure
6287 **/
6288 static void ixgbe_sfp_link_config_subtask(struct ixgbe_adapter *adapter)
6289 {
6290 struct ixgbe_hw *hw = &adapter->hw;
6291 u32 autoneg;
6292 bool negotiation;
6293
6294 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_CONFIG))
6295 return;
6296
6297 /* someone else is in init, wait until next service event */
6298 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
6299 return;
6300
6301 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
6302
6303 autoneg = hw->phy.autoneg_advertised;
6304 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
6305 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
6306 hw->mac.autotry_restart = false;
6307 if (hw->mac.ops.setup_link)
6308 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
6309
6310 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
6311 adapter->link_check_timeout = jiffies;
6312 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
6313 }
6314
6315 /**
6316 * ixgbe_service_timer - Timer Call-back
6317 * @data: pointer to adapter cast into an unsigned long
6318 **/
6319 static void ixgbe_service_timer(unsigned long data)
6320 {
6321 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
6322 unsigned long next_event_offset;
6323
6324 /* poll faster when waiting for link */
6325 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
6326 next_event_offset = HZ / 10;
6327 else
6328 next_event_offset = HZ * 2;
6329
6330 /* Reset the timer */
6331 mod_timer(&adapter->service_timer, next_event_offset + jiffies);
6332
6333 ixgbe_service_event_schedule(adapter);
6334 }
6335
6336 static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter)
6337 {
6338 if (!(adapter->flags2 & IXGBE_FLAG2_RESET_REQUESTED))
6339 return;
6340
6341 adapter->flags2 &= ~IXGBE_FLAG2_RESET_REQUESTED;
6342
6343 /* If we're already down or resetting, just bail */
6344 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6345 test_bit(__IXGBE_RESETTING, &adapter->state))
6346 return;
6347
6348 ixgbe_dump(adapter);
6349 netdev_err(adapter->netdev, "Reset adapter\n");
6350 adapter->tx_timeout_count++;
6351
6352 ixgbe_reinit_locked(adapter);
6353 }
6354
6355 /**
6356 * ixgbe_service_task - manages and runs subtasks
6357 * @work: pointer to work_struct containing our data
6358 **/
6359 static void ixgbe_service_task(struct work_struct *work)
6360 {
6361 struct ixgbe_adapter *adapter = container_of(work,
6362 struct ixgbe_adapter,
6363 service_task);
6364
6365 ixgbe_reset_subtask(adapter);
6366 ixgbe_sfp_detection_subtask(adapter);
6367 ixgbe_sfp_link_config_subtask(adapter);
6368 ixgbe_check_overtemp_subtask(adapter);
6369 ixgbe_watchdog_subtask(adapter);
6370 ixgbe_fdir_reinit_subtask(adapter);
6371 ixgbe_check_hang_subtask(adapter);
6372
6373 ixgbe_service_event_complete(adapter);
6374 }
6375
6376 static int ixgbe_tso(struct ixgbe_adapter *adapter,
6377 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
6378 u32 tx_flags, u8 *hdr_len, __be16 protocol)
6379 {
6380 struct ixgbe_adv_tx_context_desc *context_desc;
6381 unsigned int i;
6382 int err;
6383 struct ixgbe_tx_buffer *tx_buffer_info;
6384 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
6385 u32 mss_l4len_idx, l4len;
6386
6387 if (skb_is_gso(skb)) {
6388 if (skb_header_cloned(skb)) {
6389 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
6390 if (err)
6391 return err;
6392 }
6393 l4len = tcp_hdrlen(skb);
6394 *hdr_len += l4len;
6395
6396 if (protocol == htons(ETH_P_IP)) {
6397 struct iphdr *iph = ip_hdr(skb);
6398 iph->tot_len = 0;
6399 iph->check = 0;
6400 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
6401 iph->daddr, 0,
6402 IPPROTO_TCP,
6403 0);
6404 } else if (skb_is_gso_v6(skb)) {
6405 ipv6_hdr(skb)->payload_len = 0;
6406 tcp_hdr(skb)->check =
6407 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
6408 &ipv6_hdr(skb)->daddr,
6409 0, IPPROTO_TCP, 0);
6410 }
6411
6412 i = tx_ring->next_to_use;
6413
6414 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6415 context_desc = IXGBE_TX_CTXTDESC_ADV(tx_ring, i);
6416
6417 /* VLAN MACLEN IPLEN */
6418 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
6419 vlan_macip_lens |=
6420 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
6421 vlan_macip_lens |= ((skb_network_offset(skb)) <<
6422 IXGBE_ADVTXD_MACLEN_SHIFT);
6423 *hdr_len += skb_network_offset(skb);
6424 vlan_macip_lens |=
6425 (skb_transport_header(skb) - skb_network_header(skb));
6426 *hdr_len +=
6427 (skb_transport_header(skb) - skb_network_header(skb));
6428 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
6429 context_desc->seqnum_seed = 0;
6430
6431 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
6432 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
6433 IXGBE_ADVTXD_DTYP_CTXT);
6434
6435 if (protocol == htons(ETH_P_IP))
6436 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
6437 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
6438 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
6439
6440 /* MSS L4LEN IDX */
6441 mss_l4len_idx =
6442 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
6443 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
6444 /* use index 1 for TSO */
6445 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6446 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
6447
6448 tx_buffer_info->time_stamp = jiffies;
6449 tx_buffer_info->next_to_watch = i;
6450
6451 i++;
6452 if (i == tx_ring->count)
6453 i = 0;
6454 tx_ring->next_to_use = i;
6455
6456 return true;
6457 }
6458 return false;
6459 }
6460
6461 static u32 ixgbe_psum(struct ixgbe_adapter *adapter, struct sk_buff *skb,
6462 __be16 protocol)
6463 {
6464 u32 rtn = 0;
6465
6466 switch (protocol) {
6467 case cpu_to_be16(ETH_P_IP):
6468 rtn |= IXGBE_ADVTXD_TUCMD_IPV4;
6469 switch (ip_hdr(skb)->protocol) {
6470 case IPPROTO_TCP:
6471 rtn |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
6472 break;
6473 case IPPROTO_SCTP:
6474 rtn |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
6475 break;
6476 }
6477 break;
6478 case cpu_to_be16(ETH_P_IPV6):
6479 /* XXX what about other V6 headers?? */
6480 switch (ipv6_hdr(skb)->nexthdr) {
6481 case IPPROTO_TCP:
6482 rtn |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
6483 break;
6484 case IPPROTO_SCTP:
6485 rtn |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
6486 break;
6487 }
6488 break;
6489 default:
6490 if (unlikely(net_ratelimit()))
6491 e_warn(probe, "partial checksum but proto=%x!\n",
6492 protocol);
6493 break;
6494 }
6495
6496 return rtn;
6497 }
6498
6499 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
6500 struct ixgbe_ring *tx_ring,
6501 struct sk_buff *skb, u32 tx_flags,
6502 __be16 protocol)
6503 {
6504 struct ixgbe_adv_tx_context_desc *context_desc;
6505 unsigned int i;
6506 struct ixgbe_tx_buffer *tx_buffer_info;
6507 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
6508
6509 if (skb->ip_summed == CHECKSUM_PARTIAL ||
6510 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
6511 i = tx_ring->next_to_use;
6512 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6513 context_desc = IXGBE_TX_CTXTDESC_ADV(tx_ring, i);
6514
6515 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
6516 vlan_macip_lens |=
6517 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
6518 vlan_macip_lens |= (skb_network_offset(skb) <<
6519 IXGBE_ADVTXD_MACLEN_SHIFT);
6520 if (skb->ip_summed == CHECKSUM_PARTIAL)
6521 vlan_macip_lens |= (skb_transport_header(skb) -
6522 skb_network_header(skb));
6523
6524 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
6525 context_desc->seqnum_seed = 0;
6526
6527 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
6528 IXGBE_ADVTXD_DTYP_CTXT);
6529
6530 if (skb->ip_summed == CHECKSUM_PARTIAL)
6531 type_tucmd_mlhl |= ixgbe_psum(adapter, skb, protocol);
6532
6533 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
6534 /* use index zero for tx checksum offload */
6535 context_desc->mss_l4len_idx = 0;
6536
6537 tx_buffer_info->time_stamp = jiffies;
6538 tx_buffer_info->next_to_watch = i;
6539
6540 i++;
6541 if (i == tx_ring->count)
6542 i = 0;
6543 tx_ring->next_to_use = i;
6544
6545 return true;
6546 }
6547
6548 return false;
6549 }
6550
6551 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
6552 struct ixgbe_ring *tx_ring,
6553 struct sk_buff *skb, u32 tx_flags,
6554 unsigned int first, const u8 hdr_len)
6555 {
6556 struct device *dev = tx_ring->dev;
6557 struct ixgbe_tx_buffer *tx_buffer_info;
6558 unsigned int len;
6559 unsigned int total = skb->len;
6560 unsigned int offset = 0, size, count = 0, i;
6561 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
6562 unsigned int f;
6563 unsigned int bytecount = skb->len;
6564 u16 gso_segs = 1;
6565
6566 i = tx_ring->next_to_use;
6567
6568 if (tx_flags & IXGBE_TX_FLAGS_FCOE)
6569 /* excluding fcoe_crc_eof for FCoE */
6570 total -= sizeof(struct fcoe_crc_eof);
6571
6572 len = min(skb_headlen(skb), total);
6573 while (len) {
6574 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6575 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
6576
6577 tx_buffer_info->length = size;
6578 tx_buffer_info->mapped_as_page = false;
6579 tx_buffer_info->dma = dma_map_single(dev,
6580 skb->data + offset,
6581 size, DMA_TO_DEVICE);
6582 if (dma_mapping_error(dev, tx_buffer_info->dma))
6583 goto dma_error;
6584 tx_buffer_info->time_stamp = jiffies;
6585 tx_buffer_info->next_to_watch = i;
6586
6587 len -= size;
6588 total -= size;
6589 offset += size;
6590 count++;
6591
6592 if (len) {
6593 i++;
6594 if (i == tx_ring->count)
6595 i = 0;
6596 }
6597 }
6598
6599 for (f = 0; f < nr_frags; f++) {
6600 struct skb_frag_struct *frag;
6601
6602 frag = &skb_shinfo(skb)->frags[f];
6603 len = min((unsigned int)frag->size, total);
6604 offset = frag->page_offset;
6605
6606 while (len) {
6607 i++;
6608 if (i == tx_ring->count)
6609 i = 0;
6610
6611 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6612 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
6613
6614 tx_buffer_info->length = size;
6615 tx_buffer_info->dma = dma_map_page(dev,
6616 frag->page,
6617 offset, size,
6618 DMA_TO_DEVICE);
6619 tx_buffer_info->mapped_as_page = true;
6620 if (dma_mapping_error(dev, tx_buffer_info->dma))
6621 goto dma_error;
6622 tx_buffer_info->time_stamp = jiffies;
6623 tx_buffer_info->next_to_watch = i;
6624
6625 len -= size;
6626 total -= size;
6627 offset += size;
6628 count++;
6629 }
6630 if (total == 0)
6631 break;
6632 }
6633
6634 if (tx_flags & IXGBE_TX_FLAGS_TSO)
6635 gso_segs = skb_shinfo(skb)->gso_segs;
6636 #ifdef IXGBE_FCOE
6637 /* adjust for FCoE Sequence Offload */
6638 else if (tx_flags & IXGBE_TX_FLAGS_FSO)
6639 gso_segs = DIV_ROUND_UP(skb->len - hdr_len,
6640 skb_shinfo(skb)->gso_size);
6641 #endif /* IXGBE_FCOE */
6642 bytecount += (gso_segs - 1) * hdr_len;
6643
6644 /* multiply data chunks by size of headers */
6645 tx_ring->tx_buffer_info[i].bytecount = bytecount;
6646 tx_ring->tx_buffer_info[i].gso_segs = gso_segs;
6647 tx_ring->tx_buffer_info[i].skb = skb;
6648 tx_ring->tx_buffer_info[first].next_to_watch = i;
6649
6650 return count;
6651
6652 dma_error:
6653 e_dev_err("TX DMA map failed\n");
6654
6655 /* clear timestamp and dma mappings for failed tx_buffer_info map */
6656 tx_buffer_info->dma = 0;
6657 tx_buffer_info->time_stamp = 0;
6658 tx_buffer_info->next_to_watch = 0;
6659 if (count)
6660 count--;
6661
6662 /* clear timestamp and dma mappings for remaining portion of packet */
6663 while (count--) {
6664 if (i == 0)
6665 i += tx_ring->count;
6666 i--;
6667 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6668 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
6669 }
6670
6671 return 0;
6672 }
6673
6674 static void ixgbe_tx_queue(struct ixgbe_ring *tx_ring,
6675 int tx_flags, int count, u32 paylen, u8 hdr_len)
6676 {
6677 union ixgbe_adv_tx_desc *tx_desc = NULL;
6678 struct ixgbe_tx_buffer *tx_buffer_info;
6679 u32 olinfo_status = 0, cmd_type_len = 0;
6680 unsigned int i;
6681 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
6682
6683 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
6684
6685 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
6686
6687 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
6688 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
6689
6690 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
6691 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6692
6693 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6694 IXGBE_ADVTXD_POPTS_SHIFT;
6695
6696 /* use index 1 context for tso */
6697 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6698 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
6699 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
6700 IXGBE_ADVTXD_POPTS_SHIFT;
6701
6702 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
6703 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6704 IXGBE_ADVTXD_POPTS_SHIFT;
6705
6706 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6707 olinfo_status |= IXGBE_ADVTXD_CC;
6708 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6709 if (tx_flags & IXGBE_TX_FLAGS_FSO)
6710 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6711 }
6712
6713 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
6714
6715 i = tx_ring->next_to_use;
6716 while (count--) {
6717 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6718 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
6719 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
6720 tx_desc->read.cmd_type_len =
6721 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
6722 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
6723 i++;
6724 if (i == tx_ring->count)
6725 i = 0;
6726 }
6727
6728 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
6729
6730 /*
6731 * Force memory writes to complete before letting h/w
6732 * know there are new descriptors to fetch. (Only
6733 * applicable for weak-ordered memory model archs,
6734 * such as IA-64).
6735 */
6736 wmb();
6737
6738 tx_ring->next_to_use = i;
6739 writel(i, tx_ring->tail);
6740 }
6741
6742 static void ixgbe_atr(struct ixgbe_ring *ring, struct sk_buff *skb,
6743 u32 tx_flags, __be16 protocol)
6744 {
6745 struct ixgbe_q_vector *q_vector = ring->q_vector;
6746 union ixgbe_atr_hash_dword input = { .dword = 0 };
6747 union ixgbe_atr_hash_dword common = { .dword = 0 };
6748 union {
6749 unsigned char *network;
6750 struct iphdr *ipv4;
6751 struct ipv6hdr *ipv6;
6752 } hdr;
6753 struct tcphdr *th;
6754 __be16 vlan_id;
6755
6756 /* if ring doesn't have a interrupt vector, cannot perform ATR */
6757 if (!q_vector)
6758 return;
6759
6760 /* do nothing if sampling is disabled */
6761 if (!ring->atr_sample_rate)
6762 return;
6763
6764 ring->atr_count++;
6765
6766 /* snag network header to get L4 type and address */
6767 hdr.network = skb_network_header(skb);
6768
6769 /* Currently only IPv4/IPv6 with TCP is supported */
6770 if ((protocol != __constant_htons(ETH_P_IPV6) ||
6771 hdr.ipv6->nexthdr != IPPROTO_TCP) &&
6772 (protocol != __constant_htons(ETH_P_IP) ||
6773 hdr.ipv4->protocol != IPPROTO_TCP))
6774 return;
6775
6776 th = tcp_hdr(skb);
6777
6778 /* skip this packet since the socket is closing */
6779 if (th->fin)
6780 return;
6781
6782 /* sample on all syn packets or once every atr sample count */
6783 if (!th->syn && (ring->atr_count < ring->atr_sample_rate))
6784 return;
6785
6786 /* reset sample count */
6787 ring->atr_count = 0;
6788
6789 vlan_id = htons(tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT);
6790
6791 /*
6792 * src and dst are inverted, think how the receiver sees them
6793 *
6794 * The input is broken into two sections, a non-compressed section
6795 * containing vm_pool, vlan_id, and flow_type. The rest of the data
6796 * is XORed together and stored in the compressed dword.
6797 */
6798 input.formatted.vlan_id = vlan_id;
6799
6800 /*
6801 * since src port and flex bytes occupy the same word XOR them together
6802 * and write the value to source port portion of compressed dword
6803 */
6804 if (vlan_id)
6805 common.port.src ^= th->dest ^ __constant_htons(ETH_P_8021Q);
6806 else
6807 common.port.src ^= th->dest ^ protocol;
6808 common.port.dst ^= th->source;
6809
6810 if (protocol == __constant_htons(ETH_P_IP)) {
6811 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4;
6812 common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr;
6813 } else {
6814 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6;
6815 common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^
6816 hdr.ipv6->saddr.s6_addr32[1] ^
6817 hdr.ipv6->saddr.s6_addr32[2] ^
6818 hdr.ipv6->saddr.s6_addr32[3] ^
6819 hdr.ipv6->daddr.s6_addr32[0] ^
6820 hdr.ipv6->daddr.s6_addr32[1] ^
6821 hdr.ipv6->daddr.s6_addr32[2] ^
6822 hdr.ipv6->daddr.s6_addr32[3];
6823 }
6824
6825 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
6826 ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw,
6827 input, common, ring->queue_index);
6828 }
6829
6830 static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, int size)
6831 {
6832 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
6833 /* Herbert's original patch had:
6834 * smp_mb__after_netif_stop_queue();
6835 * but since that doesn't exist yet, just open code it. */
6836 smp_mb();
6837
6838 /* We need to check again in a case another CPU has just
6839 * made room available. */
6840 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
6841 return -EBUSY;
6842
6843 /* A reprieve! - use start_queue because it doesn't call schedule */
6844 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
6845 ++tx_ring->tx_stats.restart_queue;
6846 return 0;
6847 }
6848
6849 static int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, int size)
6850 {
6851 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
6852 return 0;
6853 return __ixgbe_maybe_stop_tx(tx_ring, size);
6854 }
6855
6856 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
6857 {
6858 struct ixgbe_adapter *adapter = netdev_priv(dev);
6859 int txq = smp_processor_id();
6860 #ifdef IXGBE_FCOE
6861 __be16 protocol;
6862
6863 protocol = vlan_get_protocol(skb);
6864
6865 if (((protocol == htons(ETH_P_FCOE)) ||
6866 (protocol == htons(ETH_P_FIP))) &&
6867 (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) {
6868 txq &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
6869 txq += adapter->ring_feature[RING_F_FCOE].mask;
6870 return txq;
6871 }
6872 #endif
6873
6874 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
6875 while (unlikely(txq >= dev->real_num_tx_queues))
6876 txq -= dev->real_num_tx_queues;
6877 return txq;
6878 }
6879
6880 return skb_tx_hash(dev, skb);
6881 }
6882
6883 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
6884 struct ixgbe_adapter *adapter,
6885 struct ixgbe_ring *tx_ring)
6886 {
6887 unsigned int first;
6888 unsigned int tx_flags = 0;
6889 u8 hdr_len = 0;
6890 int tso;
6891 int count = 0;
6892 unsigned int f;
6893 __be16 protocol;
6894
6895 protocol = vlan_get_protocol(skb);
6896
6897 if (vlan_tx_tag_present(skb)) {
6898 tx_flags |= vlan_tx_tag_get(skb);
6899 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6900 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
6901 tx_flags |= tx_ring->dcb_tc << 13;
6902 }
6903 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6904 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6905 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED &&
6906 skb->priority != TC_PRIO_CONTROL) {
6907 tx_flags |= tx_ring->dcb_tc << 13;
6908 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6909 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6910 }
6911
6912 #ifdef IXGBE_FCOE
6913 /* for FCoE with DCB, we force the priority to what
6914 * was specified by the switch */
6915 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED &&
6916 (protocol == htons(ETH_P_FCOE)))
6917 tx_flags |= IXGBE_TX_FLAGS_FCOE;
6918 #endif
6919
6920 /* four things can cause us to need a context descriptor */
6921 if (skb_is_gso(skb) ||
6922 (skb->ip_summed == CHECKSUM_PARTIAL) ||
6923 (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
6924 (tx_flags & IXGBE_TX_FLAGS_FCOE))
6925 count++;
6926
6927 count += TXD_USE_COUNT(skb_headlen(skb));
6928 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
6929 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
6930
6931 if (ixgbe_maybe_stop_tx(tx_ring, count)) {
6932 tx_ring->tx_stats.tx_busy++;
6933 return NETDEV_TX_BUSY;
6934 }
6935
6936 first = tx_ring->next_to_use;
6937 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6938 #ifdef IXGBE_FCOE
6939 /* setup tx offload for FCoE */
6940 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
6941 if (tso < 0) {
6942 dev_kfree_skb_any(skb);
6943 return NETDEV_TX_OK;
6944 }
6945 if (tso)
6946 tx_flags |= IXGBE_TX_FLAGS_FSO;
6947 #endif /* IXGBE_FCOE */
6948 } else {
6949 if (protocol == htons(ETH_P_IP))
6950 tx_flags |= IXGBE_TX_FLAGS_IPV4;
6951 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len,
6952 protocol);
6953 if (tso < 0) {
6954 dev_kfree_skb_any(skb);
6955 return NETDEV_TX_OK;
6956 }
6957
6958 if (tso)
6959 tx_flags |= IXGBE_TX_FLAGS_TSO;
6960 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags,
6961 protocol) &&
6962 (skb->ip_summed == CHECKSUM_PARTIAL))
6963 tx_flags |= IXGBE_TX_FLAGS_CSUM;
6964 }
6965
6966 count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first, hdr_len);
6967 if (count) {
6968 /* add the ATR filter if ATR is on */
6969 if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state))
6970 ixgbe_atr(tx_ring, skb, tx_flags, protocol);
6971 ixgbe_tx_queue(tx_ring, tx_flags, count, skb->len, hdr_len);
6972 ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);
6973
6974 } else {
6975 dev_kfree_skb_any(skb);
6976 tx_ring->tx_buffer_info[first].time_stamp = 0;
6977 tx_ring->next_to_use = first;
6978 }
6979
6980 return NETDEV_TX_OK;
6981 }
6982
6983 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
6984 {
6985 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6986 struct ixgbe_ring *tx_ring;
6987
6988 tx_ring = adapter->tx_ring[skb->queue_mapping];
6989 return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
6990 }
6991
6992 /**
6993 * ixgbe_set_mac - Change the Ethernet Address of the NIC
6994 * @netdev: network interface device structure
6995 * @p: pointer to an address structure
6996 *
6997 * Returns 0 on success, negative on failure
6998 **/
6999 static int ixgbe_set_mac(struct net_device *netdev, void *p)
7000 {
7001 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7002 struct ixgbe_hw *hw = &adapter->hw;
7003 struct sockaddr *addr = p;
7004
7005 if (!is_valid_ether_addr(addr->sa_data))
7006 return -EADDRNOTAVAIL;
7007
7008 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
7009 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
7010
7011 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
7012 IXGBE_RAH_AV);
7013
7014 return 0;
7015 }
7016
7017 static int
7018 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
7019 {
7020 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7021 struct ixgbe_hw *hw = &adapter->hw;
7022 u16 value;
7023 int rc;
7024
7025 if (prtad != hw->phy.mdio.prtad)
7026 return -EINVAL;
7027 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
7028 if (!rc)
7029 rc = value;
7030 return rc;
7031 }
7032
7033 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
7034 u16 addr, u16 value)
7035 {
7036 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7037 struct ixgbe_hw *hw = &adapter->hw;
7038
7039 if (prtad != hw->phy.mdio.prtad)
7040 return -EINVAL;
7041 return hw->phy.ops.write_reg(hw, addr, devad, value);
7042 }
7043
7044 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
7045 {
7046 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7047
7048 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
7049 }
7050
7051 /**
7052 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
7053 * netdev->dev_addrs
7054 * @netdev: network interface device structure
7055 *
7056 * Returns non-zero on failure
7057 **/
7058 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
7059 {
7060 int err = 0;
7061 struct ixgbe_adapter *adapter = netdev_priv(dev);
7062 struct ixgbe_mac_info *mac = &adapter->hw.mac;
7063
7064 if (is_valid_ether_addr(mac->san_addr)) {
7065 rtnl_lock();
7066 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
7067 rtnl_unlock();
7068 }
7069 return err;
7070 }
7071
7072 /**
7073 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
7074 * netdev->dev_addrs
7075 * @netdev: network interface device structure
7076 *
7077 * Returns non-zero on failure
7078 **/
7079 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
7080 {
7081 int err = 0;
7082 struct ixgbe_adapter *adapter = netdev_priv(dev);
7083 struct ixgbe_mac_info *mac = &adapter->hw.mac;
7084
7085 if (is_valid_ether_addr(mac->san_addr)) {
7086 rtnl_lock();
7087 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
7088 rtnl_unlock();
7089 }
7090 return err;
7091 }
7092
7093 #ifdef CONFIG_NET_POLL_CONTROLLER
7094 /*
7095 * Polling 'interrupt' - used by things like netconsole to send skbs
7096 * without having to re-enable interrupts. It's not called while
7097 * the interrupt routine is executing.
7098 */
7099 static void ixgbe_netpoll(struct net_device *netdev)
7100 {
7101 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7102 int i;
7103
7104 /* if interface is down do nothing */
7105 if (test_bit(__IXGBE_DOWN, &adapter->state))
7106 return;
7107
7108 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
7109 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
7110 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
7111 for (i = 0; i < num_q_vectors; i++) {
7112 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
7113 ixgbe_msix_clean_many(0, q_vector);
7114 }
7115 } else {
7116 ixgbe_intr(adapter->pdev->irq, netdev);
7117 }
7118 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
7119 }
7120 #endif
7121
7122 static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
7123 struct rtnl_link_stats64 *stats)
7124 {
7125 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7126 int i;
7127
7128 rcu_read_lock();
7129 for (i = 0; i < adapter->num_rx_queues; i++) {
7130 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]);
7131 u64 bytes, packets;
7132 unsigned int start;
7133
7134 if (ring) {
7135 do {
7136 start = u64_stats_fetch_begin_bh(&ring->syncp);
7137 packets = ring->stats.packets;
7138 bytes = ring->stats.bytes;
7139 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
7140 stats->rx_packets += packets;
7141 stats->rx_bytes += bytes;
7142 }
7143 }
7144
7145 for (i = 0; i < adapter->num_tx_queues; i++) {
7146 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->tx_ring[i]);
7147 u64 bytes, packets;
7148 unsigned int start;
7149
7150 if (ring) {
7151 do {
7152 start = u64_stats_fetch_begin_bh(&ring->syncp);
7153 packets = ring->stats.packets;
7154 bytes = ring->stats.bytes;
7155 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
7156 stats->tx_packets += packets;
7157 stats->tx_bytes += bytes;
7158 }
7159 }
7160 rcu_read_unlock();
7161 /* following stats updated by ixgbe_watchdog_task() */
7162 stats->multicast = netdev->stats.multicast;
7163 stats->rx_errors = netdev->stats.rx_errors;
7164 stats->rx_length_errors = netdev->stats.rx_length_errors;
7165 stats->rx_crc_errors = netdev->stats.rx_crc_errors;
7166 stats->rx_missed_errors = netdev->stats.rx_missed_errors;
7167 return stats;
7168 }
7169
7170 /* ixgbe_validate_rtr - verify 802.1Qp to Rx packet buffer mapping is valid.
7171 * #adapter: pointer to ixgbe_adapter
7172 * @tc: number of traffic classes currently enabled
7173 *
7174 * Configure a valid 802.1Qp to Rx packet buffer mapping ie confirm
7175 * 802.1Q priority maps to a packet buffer that exists.
7176 */
7177 static void ixgbe_validate_rtr(struct ixgbe_adapter *adapter, u8 tc)
7178 {
7179 struct ixgbe_hw *hw = &adapter->hw;
7180 u32 reg, rsave;
7181 int i;
7182
7183 /* 82598 have a static priority to TC mapping that can not
7184 * be changed so no validation is needed.
7185 */
7186 if (hw->mac.type == ixgbe_mac_82598EB)
7187 return;
7188
7189 reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC);
7190 rsave = reg;
7191
7192 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
7193 u8 up2tc = reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT);
7194
7195 /* If up2tc is out of bounds default to zero */
7196 if (up2tc > tc)
7197 reg &= ~(0x7 << IXGBE_RTRUP2TC_UP_SHIFT);
7198 }
7199
7200 if (reg != rsave)
7201 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
7202
7203 return;
7204 }
7205
7206
7207 /* ixgbe_setup_tc - routine to configure net_device for multiple traffic
7208 * classes.
7209 *
7210 * @netdev: net device to configure
7211 * @tc: number of traffic classes to enable
7212 */
7213 int ixgbe_setup_tc(struct net_device *dev, u8 tc)
7214 {
7215 struct ixgbe_adapter *adapter = netdev_priv(dev);
7216 struct ixgbe_hw *hw = &adapter->hw;
7217
7218 /* If DCB is anabled do not remove traffic classes, multiple
7219 * traffic classes are required to implement DCB
7220 */
7221 if (!tc && (adapter->flags & IXGBE_FLAG_DCB_ENABLED))
7222 return 0;
7223
7224 /* Hardware supports up to 8 traffic classes */
7225 if (tc > MAX_TRAFFIC_CLASS ||
7226 (hw->mac.type == ixgbe_mac_82598EB && tc < MAX_TRAFFIC_CLASS))
7227 return -EINVAL;
7228
7229 /* Hardware has to reinitialize queues and interrupts to
7230 * match packet buffer alignment. Unfortunantly, the
7231 * hardware is not flexible enough to do this dynamically.
7232 */
7233 if (netif_running(dev))
7234 ixgbe_close(dev);
7235 ixgbe_clear_interrupt_scheme(adapter);
7236
7237 if (tc)
7238 netdev_set_num_tc(dev, tc);
7239 else
7240 netdev_reset_tc(dev);
7241
7242 ixgbe_init_interrupt_scheme(adapter);
7243 ixgbe_validate_rtr(adapter, tc);
7244 if (netif_running(dev))
7245 ixgbe_open(dev);
7246
7247 return 0;
7248 }
7249
7250 static const struct net_device_ops ixgbe_netdev_ops = {
7251 .ndo_open = ixgbe_open,
7252 .ndo_stop = ixgbe_close,
7253 .ndo_start_xmit = ixgbe_xmit_frame,
7254 .ndo_select_queue = ixgbe_select_queue,
7255 .ndo_set_rx_mode = ixgbe_set_rx_mode,
7256 .ndo_set_multicast_list = ixgbe_set_rx_mode,
7257 .ndo_validate_addr = eth_validate_addr,
7258 .ndo_set_mac_address = ixgbe_set_mac,
7259 .ndo_change_mtu = ixgbe_change_mtu,
7260 .ndo_tx_timeout = ixgbe_tx_timeout,
7261 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
7262 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
7263 .ndo_do_ioctl = ixgbe_ioctl,
7264 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
7265 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
7266 .ndo_set_vf_tx_rate = ixgbe_ndo_set_vf_bw,
7267 .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
7268 .ndo_get_stats64 = ixgbe_get_stats64,
7269 .ndo_setup_tc = ixgbe_setup_tc,
7270 #ifdef CONFIG_NET_POLL_CONTROLLER
7271 .ndo_poll_controller = ixgbe_netpoll,
7272 #endif
7273 #ifdef IXGBE_FCOE
7274 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
7275 .ndo_fcoe_ddp_target = ixgbe_fcoe_ddp_target,
7276 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
7277 .ndo_fcoe_enable = ixgbe_fcoe_enable,
7278 .ndo_fcoe_disable = ixgbe_fcoe_disable,
7279 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
7280 #endif /* IXGBE_FCOE */
7281 };
7282
7283 static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter,
7284 const struct ixgbe_info *ii)
7285 {
7286 #ifdef CONFIG_PCI_IOV
7287 struct ixgbe_hw *hw = &adapter->hw;
7288 int err;
7289 int num_vf_macvlans, i;
7290 struct vf_macvlans *mv_list;
7291
7292 if (hw->mac.type == ixgbe_mac_82598EB || !max_vfs)
7293 return;
7294
7295 /* The 82599 supports up to 64 VFs per physical function
7296 * but this implementation limits allocation to 63 so that
7297 * basic networking resources are still available to the
7298 * physical function
7299 */
7300 adapter->num_vfs = (max_vfs > 63) ? 63 : max_vfs;
7301 adapter->flags |= IXGBE_FLAG_SRIOV_ENABLED;
7302 err = pci_enable_sriov(adapter->pdev, adapter->num_vfs);
7303 if (err) {
7304 e_err(probe, "Failed to enable PCI sriov: %d\n", err);
7305 goto err_novfs;
7306 }
7307
7308 num_vf_macvlans = hw->mac.num_rar_entries -
7309 (IXGBE_MAX_PF_MACVLANS + 1 + adapter->num_vfs);
7310
7311 adapter->mv_list = mv_list = kcalloc(num_vf_macvlans,
7312 sizeof(struct vf_macvlans),
7313 GFP_KERNEL);
7314 if (mv_list) {
7315 /* Initialize list of VF macvlans */
7316 INIT_LIST_HEAD(&adapter->vf_mvs.l);
7317 for (i = 0; i < num_vf_macvlans; i++) {
7318 mv_list->vf = -1;
7319 mv_list->free = true;
7320 mv_list->rar_entry = hw->mac.num_rar_entries -
7321 (i + adapter->num_vfs + 1);
7322 list_add(&mv_list->l, &adapter->vf_mvs.l);
7323 mv_list++;
7324 }
7325 }
7326
7327 /* If call to enable VFs succeeded then allocate memory
7328 * for per VF control structures.
7329 */
7330 adapter->vfinfo =
7331 kcalloc(adapter->num_vfs,
7332 sizeof(struct vf_data_storage), GFP_KERNEL);
7333 if (adapter->vfinfo) {
7334 /* Now that we're sure SR-IOV is enabled
7335 * and memory allocated set up the mailbox parameters
7336 */
7337 ixgbe_init_mbx_params_pf(hw);
7338 memcpy(&hw->mbx.ops, ii->mbx_ops,
7339 sizeof(hw->mbx.ops));
7340
7341 /* Disable RSC when in SR-IOV mode */
7342 adapter->flags2 &= ~(IXGBE_FLAG2_RSC_CAPABLE |
7343 IXGBE_FLAG2_RSC_ENABLED);
7344 return;
7345 }
7346
7347 /* Oh oh */
7348 e_err(probe, "Unable to allocate memory for VF Data Storage - "
7349 "SRIOV disabled\n");
7350 pci_disable_sriov(adapter->pdev);
7351
7352 err_novfs:
7353 adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
7354 adapter->num_vfs = 0;
7355 #endif /* CONFIG_PCI_IOV */
7356 }
7357
7358 /**
7359 * ixgbe_probe - Device Initialization Routine
7360 * @pdev: PCI device information struct
7361 * @ent: entry in ixgbe_pci_tbl
7362 *
7363 * Returns 0 on success, negative on failure
7364 *
7365 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
7366 * The OS initialization, configuring of the adapter private structure,
7367 * and a hardware reset occur.
7368 **/
7369 static int __devinit ixgbe_probe(struct pci_dev *pdev,
7370 const struct pci_device_id *ent)
7371 {
7372 struct net_device *netdev;
7373 struct ixgbe_adapter *adapter = NULL;
7374 struct ixgbe_hw *hw;
7375 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
7376 static int cards_found;
7377 int i, err, pci_using_dac;
7378 u8 part_str[IXGBE_PBANUM_LENGTH];
7379 unsigned int indices = num_possible_cpus();
7380 #ifdef IXGBE_FCOE
7381 u16 device_caps;
7382 #endif
7383 u32 eec;
7384
7385 /* Catch broken hardware that put the wrong VF device ID in
7386 * the PCIe SR-IOV capability.
7387 */
7388 if (pdev->is_virtfn) {
7389 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
7390 pci_name(pdev), pdev->vendor, pdev->device);
7391 return -EINVAL;
7392 }
7393
7394 err = pci_enable_device_mem(pdev);
7395 if (err)
7396 return err;
7397
7398 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
7399 !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
7400 pci_using_dac = 1;
7401 } else {
7402 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
7403 if (err) {
7404 err = dma_set_coherent_mask(&pdev->dev,
7405 DMA_BIT_MASK(32));
7406 if (err) {
7407 dev_err(&pdev->dev,
7408 "No usable DMA configuration, aborting\n");
7409 goto err_dma;
7410 }
7411 }
7412 pci_using_dac = 0;
7413 }
7414
7415 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
7416 IORESOURCE_MEM), ixgbe_driver_name);
7417 if (err) {
7418 dev_err(&pdev->dev,
7419 "pci_request_selected_regions failed 0x%x\n", err);
7420 goto err_pci_reg;
7421 }
7422
7423 pci_enable_pcie_error_reporting(pdev);
7424
7425 pci_set_master(pdev);
7426 pci_save_state(pdev);
7427
7428 #ifdef CONFIG_IXGBE_DCB
7429 indices *= MAX_TRAFFIC_CLASS;
7430 #endif
7431
7432 if (ii->mac == ixgbe_mac_82598EB)
7433 indices = min_t(unsigned int, indices, IXGBE_MAX_RSS_INDICES);
7434 else
7435 indices = min_t(unsigned int, indices, IXGBE_MAX_FDIR_INDICES);
7436
7437 #ifdef IXGBE_FCOE
7438 indices += min_t(unsigned int, num_possible_cpus(),
7439 IXGBE_MAX_FCOE_INDICES);
7440 #endif
7441 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
7442 if (!netdev) {
7443 err = -ENOMEM;
7444 goto err_alloc_etherdev;
7445 }
7446
7447 SET_NETDEV_DEV(netdev, &pdev->dev);
7448
7449 adapter = netdev_priv(netdev);
7450 pci_set_drvdata(pdev, adapter);
7451
7452 adapter->netdev = netdev;
7453 adapter->pdev = pdev;
7454 hw = &adapter->hw;
7455 hw->back = adapter;
7456 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
7457
7458 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
7459 pci_resource_len(pdev, 0));
7460 if (!hw->hw_addr) {
7461 err = -EIO;
7462 goto err_ioremap;
7463 }
7464
7465 for (i = 1; i <= 5; i++) {
7466 if (pci_resource_len(pdev, i) == 0)
7467 continue;
7468 }
7469
7470 netdev->netdev_ops = &ixgbe_netdev_ops;
7471 ixgbe_set_ethtool_ops(netdev);
7472 netdev->watchdog_timeo = 5 * HZ;
7473 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
7474
7475 adapter->bd_number = cards_found;
7476
7477 /* Setup hw api */
7478 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
7479 hw->mac.type = ii->mac;
7480
7481 /* EEPROM */
7482 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
7483 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
7484 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
7485 if (!(eec & (1 << 8)))
7486 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
7487
7488 /* PHY */
7489 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
7490 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
7491 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
7492 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
7493 hw->phy.mdio.mmds = 0;
7494 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
7495 hw->phy.mdio.dev = netdev;
7496 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
7497 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
7498
7499 ii->get_invariants(hw);
7500
7501 /* setup the private structure */
7502 err = ixgbe_sw_init(adapter);
7503 if (err)
7504 goto err_sw_init;
7505
7506 /* Make it possible the adapter to be woken up via WOL */
7507 switch (adapter->hw.mac.type) {
7508 case ixgbe_mac_82599EB:
7509 case ixgbe_mac_X540:
7510 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7511 break;
7512 default:
7513 break;
7514 }
7515
7516 /*
7517 * If there is a fan on this device and it has failed log the
7518 * failure.
7519 */
7520 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
7521 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
7522 if (esdp & IXGBE_ESDP_SDP1)
7523 e_crit(probe, "Fan has stopped, replace the adapter\n");
7524 }
7525
7526 /* reset_hw fills in the perm_addr as well */
7527 hw->phy.reset_if_overtemp = true;
7528 err = hw->mac.ops.reset_hw(hw);
7529 hw->phy.reset_if_overtemp = false;
7530 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
7531 hw->mac.type == ixgbe_mac_82598EB) {
7532 err = 0;
7533 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
7534 e_dev_err("failed to load because an unsupported SFP+ "
7535 "module type was detected.\n");
7536 e_dev_err("Reload the driver after installing a supported "
7537 "module.\n");
7538 goto err_sw_init;
7539 } else if (err) {
7540 e_dev_err("HW Init failed: %d\n", err);
7541 goto err_sw_init;
7542 }
7543
7544 ixgbe_probe_vf(adapter, ii);
7545
7546 netdev->features = NETIF_F_SG |
7547 NETIF_F_IP_CSUM |
7548 NETIF_F_HW_VLAN_TX |
7549 NETIF_F_HW_VLAN_RX |
7550 NETIF_F_HW_VLAN_FILTER;
7551
7552 netdev->features |= NETIF_F_IPV6_CSUM;
7553 netdev->features |= NETIF_F_TSO;
7554 netdev->features |= NETIF_F_TSO6;
7555 netdev->features |= NETIF_F_GRO;
7556 netdev->features |= NETIF_F_RXHASH;
7557
7558 switch (adapter->hw.mac.type) {
7559 case ixgbe_mac_82599EB:
7560 case ixgbe_mac_X540:
7561 netdev->features |= NETIF_F_SCTP_CSUM;
7562 break;
7563 default:
7564 break;
7565 }
7566
7567 netdev->vlan_features |= NETIF_F_TSO;
7568 netdev->vlan_features |= NETIF_F_TSO6;
7569 netdev->vlan_features |= NETIF_F_IP_CSUM;
7570 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
7571 netdev->vlan_features |= NETIF_F_SG;
7572
7573 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7574 adapter->flags &= ~(IXGBE_FLAG_RSS_ENABLED |
7575 IXGBE_FLAG_DCB_ENABLED);
7576
7577 #ifdef CONFIG_IXGBE_DCB
7578 netdev->dcbnl_ops = &dcbnl_ops;
7579 #endif
7580
7581 #ifdef IXGBE_FCOE
7582 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
7583 if (hw->mac.ops.get_device_caps) {
7584 hw->mac.ops.get_device_caps(hw, &device_caps);
7585 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
7586 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
7587 }
7588 }
7589 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
7590 netdev->vlan_features |= NETIF_F_FCOE_CRC;
7591 netdev->vlan_features |= NETIF_F_FSO;
7592 netdev->vlan_features |= NETIF_F_FCOE_MTU;
7593 }
7594 #endif /* IXGBE_FCOE */
7595 if (pci_using_dac) {
7596 netdev->features |= NETIF_F_HIGHDMA;
7597 netdev->vlan_features |= NETIF_F_HIGHDMA;
7598 }
7599
7600 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
7601 netdev->features |= NETIF_F_LRO;
7602
7603 /* make sure the EEPROM is good */
7604 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
7605 e_dev_err("The EEPROM Checksum Is Not Valid\n");
7606 err = -EIO;
7607 goto err_eeprom;
7608 }
7609
7610 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
7611 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
7612
7613 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
7614 e_dev_err("invalid MAC address\n");
7615 err = -EIO;
7616 goto err_eeprom;
7617 }
7618
7619 /* power down the optics for multispeed fiber and 82599 SFP+ fiber */
7620 if (hw->mac.ops.disable_tx_laser &&
7621 ((hw->phy.multispeed_fiber) ||
7622 ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
7623 (hw->mac.type == ixgbe_mac_82599EB))))
7624 hw->mac.ops.disable_tx_laser(hw);
7625
7626 setup_timer(&adapter->service_timer, &ixgbe_service_timer,
7627 (unsigned long) adapter);
7628
7629 INIT_WORK(&adapter->service_task, ixgbe_service_task);
7630 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
7631
7632 err = ixgbe_init_interrupt_scheme(adapter);
7633 if (err)
7634 goto err_sw_init;
7635
7636 if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED))
7637 netdev->features &= ~NETIF_F_RXHASH;
7638
7639 switch (pdev->device) {
7640 case IXGBE_DEV_ID_82599_SFP:
7641 /* Only this subdevice supports WOL */
7642 if (pdev->subsystem_device == IXGBE_SUBDEV_ID_82599_SFP)
7643 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
7644 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
7645 break;
7646 case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
7647 /* All except this subdevice support WOL */
7648 if (pdev->subsystem_device != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ)
7649 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
7650 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
7651 break;
7652 case IXGBE_DEV_ID_82599_KX4:
7653 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
7654 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
7655 break;
7656 default:
7657 adapter->wol = 0;
7658 break;
7659 }
7660 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
7661
7662 /* pick up the PCI bus settings for reporting later */
7663 hw->mac.ops.get_bus_info(hw);
7664
7665 /* print bus type/speed/width info */
7666 e_dev_info("(PCI Express:%s:%s) %pM\n",
7667 (hw->bus.speed == ixgbe_bus_speed_5000 ? "5.0GT/s" :
7668 hw->bus.speed == ixgbe_bus_speed_2500 ? "2.5GT/s" :
7669 "Unknown"),
7670 (hw->bus.width == ixgbe_bus_width_pcie_x8 ? "Width x8" :
7671 hw->bus.width == ixgbe_bus_width_pcie_x4 ? "Width x4" :
7672 hw->bus.width == ixgbe_bus_width_pcie_x1 ? "Width x1" :
7673 "Unknown"),
7674 netdev->dev_addr);
7675
7676 err = ixgbe_read_pba_string_generic(hw, part_str, IXGBE_PBANUM_LENGTH);
7677 if (err)
7678 strncpy(part_str, "Unknown", IXGBE_PBANUM_LENGTH);
7679 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
7680 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, PBA No: %s\n",
7681 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
7682 part_str);
7683 else
7684 e_dev_info("MAC: %d, PHY: %d, PBA No: %s\n",
7685 hw->mac.type, hw->phy.type, part_str);
7686
7687 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
7688 e_dev_warn("PCI-Express bandwidth available for this card is "
7689 "not sufficient for optimal performance.\n");
7690 e_dev_warn("For optimal performance a x8 PCI-Express slot "
7691 "is required.\n");
7692 }
7693
7694 /* save off EEPROM version number */
7695 hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
7696
7697 /* reset the hardware with the new settings */
7698 err = hw->mac.ops.start_hw(hw);
7699
7700 if (err == IXGBE_ERR_EEPROM_VERSION) {
7701 /* We are running on a pre-production device, log a warning */
7702 e_dev_warn("This device is a pre-production adapter/LOM. "
7703 "Please be aware there may be issues associated "
7704 "with your hardware. If you are experiencing "
7705 "problems please contact your Intel or hardware "
7706 "representative who provided you with this "
7707 "hardware.\n");
7708 }
7709 strcpy(netdev->name, "eth%d");
7710 err = register_netdev(netdev);
7711 if (err)
7712 goto err_register;
7713
7714 /* carrier off reporting is important to ethtool even BEFORE open */
7715 netif_carrier_off(netdev);
7716
7717 #ifdef CONFIG_IXGBE_DCA
7718 if (dca_add_requester(&pdev->dev) == 0) {
7719 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
7720 ixgbe_setup_dca(adapter);
7721 }
7722 #endif
7723 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
7724 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
7725 for (i = 0; i < adapter->num_vfs; i++)
7726 ixgbe_vf_configuration(pdev, (i | 0x10000000));
7727 }
7728
7729 /* add san mac addr to netdev */
7730 ixgbe_add_sanmac_netdev(netdev);
7731
7732 e_dev_info("Intel(R) 10 Gigabit Network Connection\n");
7733 cards_found++;
7734 return 0;
7735
7736 err_register:
7737 ixgbe_release_hw_control(adapter);
7738 ixgbe_clear_interrupt_scheme(adapter);
7739 err_sw_init:
7740 err_eeprom:
7741 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7742 ixgbe_disable_sriov(adapter);
7743 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
7744 iounmap(hw->hw_addr);
7745 err_ioremap:
7746 free_netdev(netdev);
7747 err_alloc_etherdev:
7748 pci_release_selected_regions(pdev,
7749 pci_select_bars(pdev, IORESOURCE_MEM));
7750 err_pci_reg:
7751 err_dma:
7752 pci_disable_device(pdev);
7753 return err;
7754 }
7755
7756 /**
7757 * ixgbe_remove - Device Removal Routine
7758 * @pdev: PCI device information struct
7759 *
7760 * ixgbe_remove is called by the PCI subsystem to alert the driver
7761 * that it should release a PCI device. The could be caused by a
7762 * Hot-Plug event, or because the driver is going to be removed from
7763 * memory.
7764 **/
7765 static void __devexit ixgbe_remove(struct pci_dev *pdev)
7766 {
7767 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7768 struct net_device *netdev = adapter->netdev;
7769
7770 set_bit(__IXGBE_DOWN, &adapter->state);
7771 cancel_work_sync(&adapter->service_task);
7772
7773 #ifdef CONFIG_IXGBE_DCA
7774 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
7775 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
7776 dca_remove_requester(&pdev->dev);
7777 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
7778 }
7779
7780 #endif
7781 #ifdef IXGBE_FCOE
7782 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
7783 ixgbe_cleanup_fcoe(adapter);
7784
7785 #endif /* IXGBE_FCOE */
7786
7787 /* remove the added san mac */
7788 ixgbe_del_sanmac_netdev(netdev);
7789
7790 if (netdev->reg_state == NETREG_REGISTERED)
7791 unregister_netdev(netdev);
7792
7793 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7794 ixgbe_disable_sriov(adapter);
7795
7796 ixgbe_clear_interrupt_scheme(adapter);
7797
7798 ixgbe_release_hw_control(adapter);
7799
7800 iounmap(adapter->hw.hw_addr);
7801 pci_release_selected_regions(pdev, pci_select_bars(pdev,
7802 IORESOURCE_MEM));
7803
7804 e_dev_info("complete\n");
7805
7806 free_netdev(netdev);
7807
7808 pci_disable_pcie_error_reporting(pdev);
7809
7810 pci_disable_device(pdev);
7811 }
7812
7813 /**
7814 * ixgbe_io_error_detected - called when PCI error is detected
7815 * @pdev: Pointer to PCI device
7816 * @state: The current pci connection state
7817 *
7818 * This function is called after a PCI bus error affecting
7819 * this device has been detected.
7820 */
7821 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
7822 pci_channel_state_t state)
7823 {
7824 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7825 struct net_device *netdev = adapter->netdev;
7826
7827 netif_device_detach(netdev);
7828
7829 if (state == pci_channel_io_perm_failure)
7830 return PCI_ERS_RESULT_DISCONNECT;
7831
7832 if (netif_running(netdev))
7833 ixgbe_down(adapter);
7834 pci_disable_device(pdev);
7835
7836 /* Request a slot reset. */
7837 return PCI_ERS_RESULT_NEED_RESET;
7838 }
7839
7840 /**
7841 * ixgbe_io_slot_reset - called after the pci bus has been reset.
7842 * @pdev: Pointer to PCI device
7843 *
7844 * Restart the card from scratch, as if from a cold-boot.
7845 */
7846 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
7847 {
7848 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7849 pci_ers_result_t result;
7850 int err;
7851
7852 if (pci_enable_device_mem(pdev)) {
7853 e_err(probe, "Cannot re-enable PCI device after reset.\n");
7854 result = PCI_ERS_RESULT_DISCONNECT;
7855 } else {
7856 pci_set_master(pdev);
7857 pci_restore_state(pdev);
7858 pci_save_state(pdev);
7859
7860 pci_wake_from_d3(pdev, false);
7861
7862 ixgbe_reset(adapter);
7863 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7864 result = PCI_ERS_RESULT_RECOVERED;
7865 }
7866
7867 err = pci_cleanup_aer_uncorrect_error_status(pdev);
7868 if (err) {
7869 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
7870 "failed 0x%0x\n", err);
7871 /* non-fatal, continue */
7872 }
7873
7874 return result;
7875 }
7876
7877 /**
7878 * ixgbe_io_resume - called when traffic can start flowing again.
7879 * @pdev: Pointer to PCI device
7880 *
7881 * This callback is called when the error recovery driver tells us that
7882 * its OK to resume normal operation.
7883 */
7884 static void ixgbe_io_resume(struct pci_dev *pdev)
7885 {
7886 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7887 struct net_device *netdev = adapter->netdev;
7888
7889 if (netif_running(netdev)) {
7890 if (ixgbe_up(adapter)) {
7891 e_info(probe, "ixgbe_up failed after reset\n");
7892 return;
7893 }
7894 }
7895
7896 netif_device_attach(netdev);
7897 }
7898
7899 static struct pci_error_handlers ixgbe_err_handler = {
7900 .error_detected = ixgbe_io_error_detected,
7901 .slot_reset = ixgbe_io_slot_reset,
7902 .resume = ixgbe_io_resume,
7903 };
7904
7905 static struct pci_driver ixgbe_driver = {
7906 .name = ixgbe_driver_name,
7907 .id_table = ixgbe_pci_tbl,
7908 .probe = ixgbe_probe,
7909 .remove = __devexit_p(ixgbe_remove),
7910 #ifdef CONFIG_PM
7911 .suspend = ixgbe_suspend,
7912 .resume = ixgbe_resume,
7913 #endif
7914 .shutdown = ixgbe_shutdown,
7915 .err_handler = &ixgbe_err_handler
7916 };
7917
7918 /**
7919 * ixgbe_init_module - Driver Registration Routine
7920 *
7921 * ixgbe_init_module is the first routine called when the driver is
7922 * loaded. All it does is register with the PCI subsystem.
7923 **/
7924 static int __init ixgbe_init_module(void)
7925 {
7926 int ret;
7927 pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
7928 pr_info("%s\n", ixgbe_copyright);
7929
7930 #ifdef CONFIG_IXGBE_DCA
7931 dca_register_notify(&dca_notifier);
7932 #endif
7933
7934 ret = pci_register_driver(&ixgbe_driver);
7935 return ret;
7936 }
7937
7938 module_init(ixgbe_init_module);
7939
7940 /**
7941 * ixgbe_exit_module - Driver Exit Cleanup Routine
7942 *
7943 * ixgbe_exit_module is called just before the driver is removed
7944 * from memory.
7945 **/
7946 static void __exit ixgbe_exit_module(void)
7947 {
7948 #ifdef CONFIG_IXGBE_DCA
7949 dca_unregister_notify(&dca_notifier);
7950 #endif
7951 pci_unregister_driver(&ixgbe_driver);
7952 rcu_barrier(); /* Wait for completion of call_rcu()'s */
7953 }
7954
7955 #ifdef CONFIG_IXGBE_DCA
7956 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
7957 void *p)
7958 {
7959 int ret_val;
7960
7961 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
7962 __ixgbe_notify_dca);
7963
7964 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
7965 }
7966
7967 #endif /* CONFIG_IXGBE_DCA */
7968
7969 module_exit(ixgbe_exit_module);
7970
7971 /* ixgbe_main.c */
Linux kernel - Deliverables
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