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[mirror_ubuntu-bionic-kernel.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/sctp.h>
39 #include <linux/pkt_sched.h>
40 #include <linux/ipv6.h>
41 #include <linux/slab.h>
42 #include <net/checksum.h>
43 #include <net/ip6_checksum.h>
44 #include <linux/ethtool.h>
45 #include <linux/if_vlan.h>
46 #include <linux/prefetch.h>
47 #include <scsi/fc/fc_fcoe.h>
48
49 #include "ixgbe.h"
50 #include "ixgbe_common.h"
51 #include "ixgbe_dcb_82599.h"
52 #include "ixgbe_sriov.h"
53
54 char ixgbe_driver_name[] = "ixgbe";
55 static const char ixgbe_driver_string[] =
56 "Intel(R) 10 Gigabit PCI Express Network Driver";
57 #define MAJ 3
58 #define MIN 4
59 #define BUILD 8
60 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \
61 __stringify(BUILD) "-k"
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 IXGBE_WRITE_FLUSH(hw);
188
189 /* take a breather then clean up driver data */
190 msleep(100);
191
192 kfree(adapter->vfinfo);
193 adapter->vfinfo = NULL;
194
195 adapter->num_vfs = 0;
196 adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
197 }
198
199 static void ixgbe_service_event_schedule(struct ixgbe_adapter *adapter)
200 {
201 if (!test_bit(__IXGBE_DOWN, &adapter->state) &&
202 !test_and_set_bit(__IXGBE_SERVICE_SCHED, &adapter->state))
203 schedule_work(&adapter->service_task);
204 }
205
206 static void ixgbe_service_event_complete(struct ixgbe_adapter *adapter)
207 {
208 BUG_ON(!test_bit(__IXGBE_SERVICE_SCHED, &adapter->state));
209
210 /* flush memory to make sure state is correct before next watchog */
211 smp_mb__before_clear_bit();
212 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
213 }
214
215 struct ixgbe_reg_info {
216 u32 ofs;
217 char *name;
218 };
219
220 static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {
221
222 /* General Registers */
223 {IXGBE_CTRL, "CTRL"},
224 {IXGBE_STATUS, "STATUS"},
225 {IXGBE_CTRL_EXT, "CTRL_EXT"},
226
227 /* Interrupt Registers */
228 {IXGBE_EICR, "EICR"},
229
230 /* RX Registers */
231 {IXGBE_SRRCTL(0), "SRRCTL"},
232 {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
233 {IXGBE_RDLEN(0), "RDLEN"},
234 {IXGBE_RDH(0), "RDH"},
235 {IXGBE_RDT(0), "RDT"},
236 {IXGBE_RXDCTL(0), "RXDCTL"},
237 {IXGBE_RDBAL(0), "RDBAL"},
238 {IXGBE_RDBAH(0), "RDBAH"},
239
240 /* TX Registers */
241 {IXGBE_TDBAL(0), "TDBAL"},
242 {IXGBE_TDBAH(0), "TDBAH"},
243 {IXGBE_TDLEN(0), "TDLEN"},
244 {IXGBE_TDH(0), "TDH"},
245 {IXGBE_TDT(0), "TDT"},
246 {IXGBE_TXDCTL(0), "TXDCTL"},
247
248 /* List Terminator */
249 {}
250 };
251
252
253 /*
254 * ixgbe_regdump - register printout routine
255 */
256 static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
257 {
258 int i = 0, j = 0;
259 char rname[16];
260 u32 regs[64];
261
262 switch (reginfo->ofs) {
263 case IXGBE_SRRCTL(0):
264 for (i = 0; i < 64; i++)
265 regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
266 break;
267 case IXGBE_DCA_RXCTRL(0):
268 for (i = 0; i < 64; i++)
269 regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
270 break;
271 case IXGBE_RDLEN(0):
272 for (i = 0; i < 64; i++)
273 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
274 break;
275 case IXGBE_RDH(0):
276 for (i = 0; i < 64; i++)
277 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
278 break;
279 case IXGBE_RDT(0):
280 for (i = 0; i < 64; i++)
281 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
282 break;
283 case IXGBE_RXDCTL(0):
284 for (i = 0; i < 64; i++)
285 regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
286 break;
287 case IXGBE_RDBAL(0):
288 for (i = 0; i < 64; i++)
289 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
290 break;
291 case IXGBE_RDBAH(0):
292 for (i = 0; i < 64; i++)
293 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
294 break;
295 case IXGBE_TDBAL(0):
296 for (i = 0; i < 64; i++)
297 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
298 break;
299 case IXGBE_TDBAH(0):
300 for (i = 0; i < 64; i++)
301 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
302 break;
303 case IXGBE_TDLEN(0):
304 for (i = 0; i < 64; i++)
305 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
306 break;
307 case IXGBE_TDH(0):
308 for (i = 0; i < 64; i++)
309 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
310 break;
311 case IXGBE_TDT(0):
312 for (i = 0; i < 64; i++)
313 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
314 break;
315 case IXGBE_TXDCTL(0):
316 for (i = 0; i < 64; i++)
317 regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
318 break;
319 default:
320 pr_info("%-15s %08x\n", reginfo->name,
321 IXGBE_READ_REG(hw, reginfo->ofs));
322 return;
323 }
324
325 for (i = 0; i < 8; i++) {
326 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7);
327 pr_err("%-15s", rname);
328 for (j = 0; j < 8; j++)
329 pr_cont(" %08x", regs[i*8+j]);
330 pr_cont("\n");
331 }
332
333 }
334
335 /*
336 * ixgbe_dump - Print registers, tx-rings and rx-rings
337 */
338 static void ixgbe_dump(struct ixgbe_adapter *adapter)
339 {
340 struct net_device *netdev = adapter->netdev;
341 struct ixgbe_hw *hw = &adapter->hw;
342 struct ixgbe_reg_info *reginfo;
343 int n = 0;
344 struct ixgbe_ring *tx_ring;
345 struct ixgbe_tx_buffer *tx_buffer_info;
346 union ixgbe_adv_tx_desc *tx_desc;
347 struct my_u0 { u64 a; u64 b; } *u0;
348 struct ixgbe_ring *rx_ring;
349 union ixgbe_adv_rx_desc *rx_desc;
350 struct ixgbe_rx_buffer *rx_buffer_info;
351 u32 staterr;
352 int i = 0;
353
354 if (!netif_msg_hw(adapter))
355 return;
356
357 /* Print netdevice Info */
358 if (netdev) {
359 dev_info(&adapter->pdev->dev, "Net device Info\n");
360 pr_info("Device Name state "
361 "trans_start last_rx\n");
362 pr_info("%-15s %016lX %016lX %016lX\n",
363 netdev->name,
364 netdev->state,
365 netdev->trans_start,
366 netdev->last_rx);
367 }
368
369 /* Print Registers */
370 dev_info(&adapter->pdev->dev, "Register Dump\n");
371 pr_info(" Register Name Value\n");
372 for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
373 reginfo->name; reginfo++) {
374 ixgbe_regdump(hw, reginfo);
375 }
376
377 /* Print TX Ring Summary */
378 if (!netdev || !netif_running(netdev))
379 goto exit;
380
381 dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
382 pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n");
383 for (n = 0; n < adapter->num_tx_queues; n++) {
384 tx_ring = adapter->tx_ring[n];
385 tx_buffer_info =
386 &tx_ring->tx_buffer_info[tx_ring->next_to_clean];
387 pr_info(" %5d %5X %5X %016llX %04X %3X %016llX\n",
388 n, tx_ring->next_to_use, tx_ring->next_to_clean,
389 (u64)tx_buffer_info->dma,
390 tx_buffer_info->length,
391 tx_buffer_info->next_to_watch,
392 (u64)tx_buffer_info->time_stamp);
393 }
394
395 /* Print TX Rings */
396 if (!netif_msg_tx_done(adapter))
397 goto rx_ring_summary;
398
399 dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
400
401 /* Transmit Descriptor Formats
402 *
403 * Advanced Transmit Descriptor
404 * +--------------------------------------------------------------+
405 * 0 | Buffer Address [63:0] |
406 * +--------------------------------------------------------------+
407 * 8 | PAYLEN | PORTS | IDX | STA | DCMD |DTYP | RSV | DTALEN |
408 * +--------------------------------------------------------------+
409 * 63 46 45 40 39 36 35 32 31 24 23 20 19 0
410 */
411
412 for (n = 0; n < adapter->num_tx_queues; n++) {
413 tx_ring = adapter->tx_ring[n];
414 pr_info("------------------------------------\n");
415 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index);
416 pr_info("------------------------------------\n");
417 pr_info("T [desc] [address 63:0 ] "
418 "[PlPOIdStDDt Ln] [bi->dma ] "
419 "leng ntw timestamp bi->skb\n");
420
421 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
422 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
423 tx_buffer_info = &tx_ring->tx_buffer_info[i];
424 u0 = (struct my_u0 *)tx_desc;
425 pr_info("T [0x%03X] %016llX %016llX %016llX"
426 " %04X %3X %016llX %p", i,
427 le64_to_cpu(u0->a),
428 le64_to_cpu(u0->b),
429 (u64)tx_buffer_info->dma,
430 tx_buffer_info->length,
431 tx_buffer_info->next_to_watch,
432 (u64)tx_buffer_info->time_stamp,
433 tx_buffer_info->skb);
434 if (i == tx_ring->next_to_use &&
435 i == tx_ring->next_to_clean)
436 pr_cont(" NTC/U\n");
437 else if (i == tx_ring->next_to_use)
438 pr_cont(" NTU\n");
439 else if (i == tx_ring->next_to_clean)
440 pr_cont(" NTC\n");
441 else
442 pr_cont("\n");
443
444 if (netif_msg_pktdata(adapter) &&
445 tx_buffer_info->dma != 0)
446 print_hex_dump(KERN_INFO, "",
447 DUMP_PREFIX_ADDRESS, 16, 1,
448 phys_to_virt(tx_buffer_info->dma),
449 tx_buffer_info->length, true);
450 }
451 }
452
453 /* Print RX Rings Summary */
454 rx_ring_summary:
455 dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
456 pr_info("Queue [NTU] [NTC]\n");
457 for (n = 0; n < adapter->num_rx_queues; n++) {
458 rx_ring = adapter->rx_ring[n];
459 pr_info("%5d %5X %5X\n",
460 n, rx_ring->next_to_use, rx_ring->next_to_clean);
461 }
462
463 /* Print RX Rings */
464 if (!netif_msg_rx_status(adapter))
465 goto exit;
466
467 dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
468
469 /* Advanced Receive Descriptor (Read) Format
470 * 63 1 0
471 * +-----------------------------------------------------+
472 * 0 | Packet Buffer Address [63:1] |A0/NSE|
473 * +----------------------------------------------+------+
474 * 8 | Header Buffer Address [63:1] | DD |
475 * +-----------------------------------------------------+
476 *
477 *
478 * Advanced Receive Descriptor (Write-Back) Format
479 *
480 * 63 48 47 32 31 30 21 20 16 15 4 3 0
481 * +------------------------------------------------------+
482 * 0 | Packet IP |SPH| HDR_LEN | RSV|Packet| RSS |
483 * | Checksum Ident | | | | Type | Type |
484 * +------------------------------------------------------+
485 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
486 * +------------------------------------------------------+
487 * 63 48 47 32 31 20 19 0
488 */
489 for (n = 0; n < adapter->num_rx_queues; n++) {
490 rx_ring = adapter->rx_ring[n];
491 pr_info("------------------------------------\n");
492 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index);
493 pr_info("------------------------------------\n");
494 pr_info("R [desc] [ PktBuf A0] "
495 "[ HeadBuf DD] [bi->dma ] [bi->skb] "
496 "<-- Adv Rx Read format\n");
497 pr_info("RWB[desc] [PcsmIpSHl PtRs] "
498 "[vl er S cks ln] ---------------- [bi->skb] "
499 "<-- Adv Rx Write-Back format\n");
500
501 for (i = 0; i < rx_ring->count; i++) {
502 rx_buffer_info = &rx_ring->rx_buffer_info[i];
503 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
504 u0 = (struct my_u0 *)rx_desc;
505 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
506 if (staterr & IXGBE_RXD_STAT_DD) {
507 /* Descriptor Done */
508 pr_info("RWB[0x%03X] %016llX "
509 "%016llX ---------------- %p", i,
510 le64_to_cpu(u0->a),
511 le64_to_cpu(u0->b),
512 rx_buffer_info->skb);
513 } else {
514 pr_info("R [0x%03X] %016llX "
515 "%016llX %016llX %p", i,
516 le64_to_cpu(u0->a),
517 le64_to_cpu(u0->b),
518 (u64)rx_buffer_info->dma,
519 rx_buffer_info->skb);
520
521 if (netif_msg_pktdata(adapter)) {
522 print_hex_dump(KERN_INFO, "",
523 DUMP_PREFIX_ADDRESS, 16, 1,
524 phys_to_virt(rx_buffer_info->dma),
525 rx_ring->rx_buf_len, true);
526
527 if (rx_ring->rx_buf_len
528 < IXGBE_RXBUFFER_2048)
529 print_hex_dump(KERN_INFO, "",
530 DUMP_PREFIX_ADDRESS, 16, 1,
531 phys_to_virt(
532 rx_buffer_info->page_dma +
533 rx_buffer_info->page_offset
534 ),
535 PAGE_SIZE/2, true);
536 }
537 }
538
539 if (i == rx_ring->next_to_use)
540 pr_cont(" NTU\n");
541 else if (i == rx_ring->next_to_clean)
542 pr_cont(" NTC\n");
543 else
544 pr_cont("\n");
545
546 }
547 }
548
549 exit:
550 return;
551 }
552
553 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
554 {
555 u32 ctrl_ext;
556
557 /* Let firmware take over control of h/w */
558 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
559 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
560 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
561 }
562
563 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
564 {
565 u32 ctrl_ext;
566
567 /* Let firmware know the driver has taken over */
568 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
569 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
570 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
571 }
572
573 /*
574 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
575 * @adapter: pointer to adapter struct
576 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
577 * @queue: queue to map the corresponding interrupt to
578 * @msix_vector: the vector to map to the corresponding queue
579 *
580 */
581 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
582 u8 queue, u8 msix_vector)
583 {
584 u32 ivar, index;
585 struct ixgbe_hw *hw = &adapter->hw;
586 switch (hw->mac.type) {
587 case ixgbe_mac_82598EB:
588 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
589 if (direction == -1)
590 direction = 0;
591 index = (((direction * 64) + queue) >> 2) & 0x1F;
592 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
593 ivar &= ~(0xFF << (8 * (queue & 0x3)));
594 ivar |= (msix_vector << (8 * (queue & 0x3)));
595 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
596 break;
597 case ixgbe_mac_82599EB:
598 case ixgbe_mac_X540:
599 if (direction == -1) {
600 /* other causes */
601 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
602 index = ((queue & 1) * 8);
603 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
604 ivar &= ~(0xFF << index);
605 ivar |= (msix_vector << index);
606 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
607 break;
608 } else {
609 /* tx or rx causes */
610 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
611 index = ((16 * (queue & 1)) + (8 * direction));
612 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
613 ivar &= ~(0xFF << index);
614 ivar |= (msix_vector << index);
615 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
616 break;
617 }
618 default:
619 break;
620 }
621 }
622
623 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
624 u64 qmask)
625 {
626 u32 mask;
627
628 switch (adapter->hw.mac.type) {
629 case ixgbe_mac_82598EB:
630 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
631 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
632 break;
633 case ixgbe_mac_82599EB:
634 case ixgbe_mac_X540:
635 mask = (qmask & 0xFFFFFFFF);
636 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
637 mask = (qmask >> 32);
638 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
639 break;
640 default:
641 break;
642 }
643 }
644
645 void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *tx_ring,
646 struct ixgbe_tx_buffer *tx_buffer_info)
647 {
648 if (tx_buffer_info->dma) {
649 if (tx_buffer_info->mapped_as_page)
650 dma_unmap_page(tx_ring->dev,
651 tx_buffer_info->dma,
652 tx_buffer_info->length,
653 DMA_TO_DEVICE);
654 else
655 dma_unmap_single(tx_ring->dev,
656 tx_buffer_info->dma,
657 tx_buffer_info->length,
658 DMA_TO_DEVICE);
659 tx_buffer_info->dma = 0;
660 }
661 if (tx_buffer_info->skb) {
662 dev_kfree_skb_any(tx_buffer_info->skb);
663 tx_buffer_info->skb = NULL;
664 }
665 tx_buffer_info->time_stamp = 0;
666 /* tx_buffer_info must be completely set up in the transmit path */
667 }
668
669 static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter)
670 {
671 struct ixgbe_hw *hw = &adapter->hw;
672 struct ixgbe_hw_stats *hwstats = &adapter->stats;
673 u32 data = 0;
674 u32 xoff[8] = {0};
675 int i;
676
677 if ((hw->fc.current_mode == ixgbe_fc_full) ||
678 (hw->fc.current_mode == ixgbe_fc_rx_pause)) {
679 switch (hw->mac.type) {
680 case ixgbe_mac_82598EB:
681 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
682 break;
683 default:
684 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
685 }
686 hwstats->lxoffrxc += data;
687
688 /* refill credits (no tx hang) if we received xoff */
689 if (!data)
690 return;
691
692 for (i = 0; i < adapter->num_tx_queues; i++)
693 clear_bit(__IXGBE_HANG_CHECK_ARMED,
694 &adapter->tx_ring[i]->state);
695 return;
696 } else if (!(adapter->dcb_cfg.pfc_mode_enable))
697 return;
698
699 /* update stats for each tc, only valid with PFC enabled */
700 for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) {
701 switch (hw->mac.type) {
702 case ixgbe_mac_82598EB:
703 xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
704 break;
705 default:
706 xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
707 }
708 hwstats->pxoffrxc[i] += xoff[i];
709 }
710
711 /* disarm tx queues that have received xoff frames */
712 for (i = 0; i < adapter->num_tx_queues; i++) {
713 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
714 u8 tc = tx_ring->dcb_tc;
715
716 if (xoff[tc])
717 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
718 }
719 }
720
721 static u64 ixgbe_get_tx_completed(struct ixgbe_ring *ring)
722 {
723 return ring->tx_stats.completed;
724 }
725
726 static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring)
727 {
728 struct ixgbe_adapter *adapter = netdev_priv(ring->netdev);
729 struct ixgbe_hw *hw = &adapter->hw;
730
731 u32 head = IXGBE_READ_REG(hw, IXGBE_TDH(ring->reg_idx));
732 u32 tail = IXGBE_READ_REG(hw, IXGBE_TDT(ring->reg_idx));
733
734 if (head != tail)
735 return (head < tail) ?
736 tail - head : (tail + ring->count - head);
737
738 return 0;
739 }
740
741 static inline bool ixgbe_check_tx_hang(struct ixgbe_ring *tx_ring)
742 {
743 u32 tx_done = ixgbe_get_tx_completed(tx_ring);
744 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
745 u32 tx_pending = ixgbe_get_tx_pending(tx_ring);
746 bool ret = false;
747
748 clear_check_for_tx_hang(tx_ring);
749
750 /*
751 * Check for a hung queue, but be thorough. This verifies
752 * that a transmit has been completed since the previous
753 * check AND there is at least one packet pending. The
754 * ARMED bit is set to indicate a potential hang. The
755 * bit is cleared if a pause frame is received to remove
756 * false hang detection due to PFC or 802.3x frames. By
757 * requiring this to fail twice we avoid races with
758 * pfc clearing the ARMED bit and conditions where we
759 * run the check_tx_hang logic with a transmit completion
760 * pending but without time to complete it yet.
761 */
762 if ((tx_done_old == tx_done) && tx_pending) {
763 /* make sure it is true for two checks in a row */
764 ret = test_and_set_bit(__IXGBE_HANG_CHECK_ARMED,
765 &tx_ring->state);
766 } else {
767 /* update completed stats and continue */
768 tx_ring->tx_stats.tx_done_old = tx_done;
769 /* reset the countdown */
770 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
771 }
772
773 return ret;
774 }
775
776 /**
777 * ixgbe_tx_timeout_reset - initiate reset due to Tx timeout
778 * @adapter: driver private struct
779 **/
780 static void ixgbe_tx_timeout_reset(struct ixgbe_adapter *adapter)
781 {
782
783 /* Do the reset outside of interrupt context */
784 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
785 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
786 ixgbe_service_event_schedule(adapter);
787 }
788 }
789
790 /**
791 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
792 * @q_vector: structure containing interrupt and ring information
793 * @tx_ring: tx ring to clean
794 **/
795 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
796 struct ixgbe_ring *tx_ring)
797 {
798 struct ixgbe_adapter *adapter = q_vector->adapter;
799 union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
800 struct ixgbe_tx_buffer *tx_buffer_info;
801 unsigned int total_bytes = 0, total_packets = 0;
802 u16 i, eop, count = 0;
803
804 i = tx_ring->next_to_clean;
805 eop = tx_ring->tx_buffer_info[i].next_to_watch;
806 eop_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
807
808 while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
809 (count < q_vector->tx.work_limit)) {
810 bool cleaned = false;
811 rmb(); /* read buffer_info after eop_desc */
812 for ( ; !cleaned; count++) {
813 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
814 tx_buffer_info = &tx_ring->tx_buffer_info[i];
815
816 tx_desc->wb.status = 0;
817 cleaned = (i == eop);
818
819 i++;
820 if (i == tx_ring->count)
821 i = 0;
822
823 if (cleaned && tx_buffer_info->skb) {
824 total_bytes += tx_buffer_info->bytecount;
825 total_packets += tx_buffer_info->gso_segs;
826 }
827
828 ixgbe_unmap_and_free_tx_resource(tx_ring,
829 tx_buffer_info);
830 }
831
832 tx_ring->tx_stats.completed++;
833 eop = tx_ring->tx_buffer_info[i].next_to_watch;
834 eop_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
835 }
836
837 tx_ring->next_to_clean = i;
838 tx_ring->stats.bytes += total_bytes;
839 tx_ring->stats.packets += total_packets;
840 u64_stats_update_begin(&tx_ring->syncp);
841 q_vector->tx.total_bytes += total_bytes;
842 q_vector->tx.total_packets += total_packets;
843 u64_stats_update_end(&tx_ring->syncp);
844
845 if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring)) {
846 /* schedule immediate reset if we believe we hung */
847 struct ixgbe_hw *hw = &adapter->hw;
848 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
849 e_err(drv, "Detected Tx Unit Hang\n"
850 " Tx Queue <%d>\n"
851 " TDH, TDT <%x>, <%x>\n"
852 " next_to_use <%x>\n"
853 " next_to_clean <%x>\n"
854 "tx_buffer_info[next_to_clean]\n"
855 " time_stamp <%lx>\n"
856 " jiffies <%lx>\n",
857 tx_ring->queue_index,
858 IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)),
859 IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)),
860 tx_ring->next_to_use, eop,
861 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
862
863 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
864
865 e_info(probe,
866 "tx hang %d detected on queue %d, resetting adapter\n",
867 adapter->tx_timeout_count + 1, tx_ring->queue_index);
868
869 /* schedule immediate reset if we believe we hung */
870 ixgbe_tx_timeout_reset(adapter);
871
872 /* the adapter is about to reset, no point in enabling stuff */
873 return true;
874 }
875
876 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
877 if (unlikely(count && netif_carrier_ok(tx_ring->netdev) &&
878 (ixgbe_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
879 /* Make sure that anybody stopping the queue after this
880 * sees the new next_to_clean.
881 */
882 smp_mb();
883 if (__netif_subqueue_stopped(tx_ring->netdev, tx_ring->queue_index) &&
884 !test_bit(__IXGBE_DOWN, &adapter->state)) {
885 netif_wake_subqueue(tx_ring->netdev, tx_ring->queue_index);
886 ++tx_ring->tx_stats.restart_queue;
887 }
888 }
889
890 return count < q_vector->tx.work_limit;
891 }
892
893 #ifdef CONFIG_IXGBE_DCA
894 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
895 struct ixgbe_ring *rx_ring,
896 int cpu)
897 {
898 struct ixgbe_hw *hw = &adapter->hw;
899 u32 rxctrl;
900 u8 reg_idx = rx_ring->reg_idx;
901
902 rxctrl = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(reg_idx));
903 switch (hw->mac.type) {
904 case ixgbe_mac_82598EB:
905 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
906 rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
907 break;
908 case ixgbe_mac_82599EB:
909 case ixgbe_mac_X540:
910 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
911 rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
912 IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
913 break;
914 default:
915 break;
916 }
917 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
918 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
919 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
920 IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl);
921 }
922
923 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
924 struct ixgbe_ring *tx_ring,
925 int cpu)
926 {
927 struct ixgbe_hw *hw = &adapter->hw;
928 u32 txctrl;
929 u8 reg_idx = tx_ring->reg_idx;
930
931 switch (hw->mac.type) {
932 case ixgbe_mac_82598EB:
933 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(reg_idx));
934 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
935 txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
936 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
937 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(reg_idx), txctrl);
938 break;
939 case ixgbe_mac_82599EB:
940 case ixgbe_mac_X540:
941 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(reg_idx));
942 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
943 txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
944 IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
945 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
946 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(reg_idx), txctrl);
947 break;
948 default:
949 break;
950 }
951 }
952
953 static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
954 {
955 struct ixgbe_adapter *adapter = q_vector->adapter;
956 int cpu = get_cpu();
957 long r_idx;
958 int i;
959
960 if (q_vector->cpu == cpu)
961 goto out_no_update;
962
963 r_idx = find_first_bit(q_vector->tx.idx, adapter->num_tx_queues);
964 for (i = 0; i < q_vector->tx.count; i++) {
965 ixgbe_update_tx_dca(adapter, adapter->tx_ring[r_idx], cpu);
966 r_idx = find_next_bit(q_vector->tx.idx, adapter->num_tx_queues,
967 r_idx + 1);
968 }
969
970 r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
971 for (i = 0; i < q_vector->rx.count; i++) {
972 ixgbe_update_rx_dca(adapter, adapter->rx_ring[r_idx], cpu);
973 r_idx = find_next_bit(q_vector->rx.idx, adapter->num_rx_queues,
974 r_idx + 1);
975 }
976
977 q_vector->cpu = cpu;
978 out_no_update:
979 put_cpu();
980 }
981
982 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
983 {
984 int num_q_vectors;
985 int i;
986
987 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
988 return;
989
990 /* always use CB2 mode, difference is masked in the CB driver */
991 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
992
993 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
994 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
995 else
996 num_q_vectors = 1;
997
998 for (i = 0; i < num_q_vectors; i++) {
999 adapter->q_vector[i]->cpu = -1;
1000 ixgbe_update_dca(adapter->q_vector[i]);
1001 }
1002 }
1003
1004 static int __ixgbe_notify_dca(struct device *dev, void *data)
1005 {
1006 struct ixgbe_adapter *adapter = dev_get_drvdata(dev);
1007 unsigned long event = *(unsigned long *)data;
1008
1009 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
1010 return 0;
1011
1012 switch (event) {
1013 case DCA_PROVIDER_ADD:
1014 /* if we're already enabled, don't do it again */
1015 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1016 break;
1017 if (dca_add_requester(dev) == 0) {
1018 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
1019 ixgbe_setup_dca(adapter);
1020 break;
1021 }
1022 /* Fall Through since DCA is disabled. */
1023 case DCA_PROVIDER_REMOVE:
1024 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
1025 dca_remove_requester(dev);
1026 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
1027 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
1028 }
1029 break;
1030 }
1031
1032 return 0;
1033 }
1034 #endif /* CONFIG_IXGBE_DCA */
1035
1036 static inline void ixgbe_rx_hash(union ixgbe_adv_rx_desc *rx_desc,
1037 struct sk_buff *skb)
1038 {
1039 skb->rxhash = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
1040 }
1041
1042 /**
1043 * ixgbe_rx_is_fcoe - check the rx desc for incoming pkt type
1044 * @adapter: address of board private structure
1045 * @rx_desc: advanced rx descriptor
1046 *
1047 * Returns : true if it is FCoE pkt
1048 */
1049 static inline bool ixgbe_rx_is_fcoe(struct ixgbe_adapter *adapter,
1050 union ixgbe_adv_rx_desc *rx_desc)
1051 {
1052 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1053
1054 return (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
1055 ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_ETQF_MASK)) ==
1056 (cpu_to_le16(IXGBE_ETQF_FILTER_FCOE <<
1057 IXGBE_RXDADV_PKTTYPE_ETQF_SHIFT)));
1058 }
1059
1060 /**
1061 * ixgbe_receive_skb - Send a completed packet up the stack
1062 * @adapter: board private structure
1063 * @skb: packet to send up
1064 * @status: hardware indication of status of receive
1065 * @rx_ring: rx descriptor ring (for a specific queue) to setup
1066 * @rx_desc: rx descriptor
1067 **/
1068 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
1069 struct sk_buff *skb, u8 status,
1070 struct ixgbe_ring *ring,
1071 union ixgbe_adv_rx_desc *rx_desc)
1072 {
1073 struct ixgbe_adapter *adapter = q_vector->adapter;
1074 struct napi_struct *napi = &q_vector->napi;
1075 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
1076 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
1077
1078 if (is_vlan && (tag & VLAN_VID_MASK))
1079 __vlan_hwaccel_put_tag(skb, tag);
1080
1081 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
1082 napi_gro_receive(napi, skb);
1083 else
1084 netif_rx(skb);
1085 }
1086
1087 /**
1088 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
1089 * @adapter: address of board private structure
1090 * @status_err: hardware indication of status of receive
1091 * @skb: skb currently being received and modified
1092 * @status_err: status error value of last descriptor in packet
1093 **/
1094 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
1095 union ixgbe_adv_rx_desc *rx_desc,
1096 struct sk_buff *skb,
1097 u32 status_err)
1098 {
1099 skb->ip_summed = CHECKSUM_NONE;
1100
1101 /* Rx csum disabled */
1102 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
1103 return;
1104
1105 /* if IP and error */
1106 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
1107 (status_err & IXGBE_RXDADV_ERR_IPE)) {
1108 adapter->hw_csum_rx_error++;
1109 return;
1110 }
1111
1112 if (!(status_err & IXGBE_RXD_STAT_L4CS))
1113 return;
1114
1115 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
1116 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1117
1118 /*
1119 * 82599 errata, UDP frames with a 0 checksum can be marked as
1120 * checksum errors.
1121 */
1122 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
1123 (adapter->hw.mac.type == ixgbe_mac_82599EB))
1124 return;
1125
1126 adapter->hw_csum_rx_error++;
1127 return;
1128 }
1129
1130 /* It must be a TCP or UDP packet with a valid checksum */
1131 skb->ip_summed = CHECKSUM_UNNECESSARY;
1132 }
1133
1134 static inline void ixgbe_release_rx_desc(struct ixgbe_ring *rx_ring, u32 val)
1135 {
1136 /*
1137 * Force memory writes to complete before letting h/w
1138 * know there are new descriptors to fetch. (Only
1139 * applicable for weak-ordered memory model archs,
1140 * such as IA-64).
1141 */
1142 wmb();
1143 writel(val, rx_ring->tail);
1144 }
1145
1146 /**
1147 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
1148 * @rx_ring: ring to place buffers on
1149 * @cleaned_count: number of buffers to replace
1150 **/
1151 void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count)
1152 {
1153 union ixgbe_adv_rx_desc *rx_desc;
1154 struct ixgbe_rx_buffer *bi;
1155 struct sk_buff *skb;
1156 u16 i = rx_ring->next_to_use;
1157
1158 /* do nothing if no valid netdev defined */
1159 if (!rx_ring->netdev)
1160 return;
1161
1162 while (cleaned_count--) {
1163 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1164 bi = &rx_ring->rx_buffer_info[i];
1165 skb = bi->skb;
1166
1167 if (!skb) {
1168 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
1169 rx_ring->rx_buf_len);
1170 if (!skb) {
1171 rx_ring->rx_stats.alloc_rx_buff_failed++;
1172 goto no_buffers;
1173 }
1174 /* initialize queue mapping */
1175 skb_record_rx_queue(skb, rx_ring->queue_index);
1176 bi->skb = skb;
1177 }
1178
1179 if (!bi->dma) {
1180 bi->dma = dma_map_single(rx_ring->dev,
1181 skb->data,
1182 rx_ring->rx_buf_len,
1183 DMA_FROM_DEVICE);
1184 if (dma_mapping_error(rx_ring->dev, bi->dma)) {
1185 rx_ring->rx_stats.alloc_rx_buff_failed++;
1186 bi->dma = 0;
1187 goto no_buffers;
1188 }
1189 }
1190
1191 if (ring_is_ps_enabled(rx_ring)) {
1192 if (!bi->page) {
1193 bi->page = netdev_alloc_page(rx_ring->netdev);
1194 if (!bi->page) {
1195 rx_ring->rx_stats.alloc_rx_page_failed++;
1196 goto no_buffers;
1197 }
1198 }
1199
1200 if (!bi->page_dma) {
1201 /* use a half page if we're re-using */
1202 bi->page_offset ^= PAGE_SIZE / 2;
1203 bi->page_dma = dma_map_page(rx_ring->dev,
1204 bi->page,
1205 bi->page_offset,
1206 PAGE_SIZE / 2,
1207 DMA_FROM_DEVICE);
1208 if (dma_mapping_error(rx_ring->dev,
1209 bi->page_dma)) {
1210 rx_ring->rx_stats.alloc_rx_page_failed++;
1211 bi->page_dma = 0;
1212 goto no_buffers;
1213 }
1214 }
1215
1216 /* Refresh the desc even if buffer_addrs didn't change
1217 * because each write-back erases this info. */
1218 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
1219 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
1220 } else {
1221 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
1222 rx_desc->read.hdr_addr = 0;
1223 }
1224
1225 i++;
1226 if (i == rx_ring->count)
1227 i = 0;
1228 }
1229
1230 no_buffers:
1231 if (rx_ring->next_to_use != i) {
1232 rx_ring->next_to_use = i;
1233 ixgbe_release_rx_desc(rx_ring, i);
1234 }
1235 }
1236
1237 static inline u16 ixgbe_get_hlen(union ixgbe_adv_rx_desc *rx_desc)
1238 {
1239 /* HW will not DMA in data larger than the given buffer, even if it
1240 * parses the (NFS, of course) header to be larger. In that case, it
1241 * fills the header buffer and spills the rest into the page.
1242 */
1243 u16 hdr_info = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info);
1244 u16 hlen = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
1245 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
1246 if (hlen > IXGBE_RX_HDR_SIZE)
1247 hlen = IXGBE_RX_HDR_SIZE;
1248 return hlen;
1249 }
1250
1251 /**
1252 * ixgbe_transform_rsc_queue - change rsc queue into a full packet
1253 * @skb: pointer to the last skb in the rsc queue
1254 *
1255 * This function changes a queue full of hw rsc buffers into a completed
1256 * packet. It uses the ->prev pointers to find the first packet and then
1257 * turns it into the frag list owner.
1258 **/
1259 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb)
1260 {
1261 unsigned int frag_list_size = 0;
1262 unsigned int skb_cnt = 1;
1263
1264 while (skb->prev) {
1265 struct sk_buff *prev = skb->prev;
1266 frag_list_size += skb->len;
1267 skb->prev = NULL;
1268 skb = prev;
1269 skb_cnt++;
1270 }
1271
1272 skb_shinfo(skb)->frag_list = skb->next;
1273 skb->next = NULL;
1274 skb->len += frag_list_size;
1275 skb->data_len += frag_list_size;
1276 skb->truesize += frag_list_size;
1277 IXGBE_RSC_CB(skb)->skb_cnt = skb_cnt;
1278
1279 return skb;
1280 }
1281
1282 static inline bool ixgbe_get_rsc_state(union ixgbe_adv_rx_desc *rx_desc)
1283 {
1284 return !!(le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
1285 IXGBE_RXDADV_RSCCNT_MASK);
1286 }
1287
1288 static void ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
1289 struct ixgbe_ring *rx_ring,
1290 int *work_done, int work_to_do)
1291 {
1292 struct ixgbe_adapter *adapter = q_vector->adapter;
1293 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
1294 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
1295 struct sk_buff *skb;
1296 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1297 const int current_node = numa_node_id();
1298 #ifdef IXGBE_FCOE
1299 int ddp_bytes = 0;
1300 #endif /* IXGBE_FCOE */
1301 u32 staterr;
1302 u16 i;
1303 u16 cleaned_count = 0;
1304 bool pkt_is_rsc = false;
1305
1306 i = rx_ring->next_to_clean;
1307 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1308 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1309
1310 while (staterr & IXGBE_RXD_STAT_DD) {
1311 u32 upper_len = 0;
1312
1313 rmb(); /* read descriptor and rx_buffer_info after status DD */
1314
1315 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1316
1317 skb = rx_buffer_info->skb;
1318 rx_buffer_info->skb = NULL;
1319 prefetch(skb->data);
1320
1321 if (ring_is_rsc_enabled(rx_ring))
1322 pkt_is_rsc = ixgbe_get_rsc_state(rx_desc);
1323
1324 /* if this is a skb from previous receive DMA will be 0 */
1325 if (rx_buffer_info->dma) {
1326 u16 hlen;
1327 if (pkt_is_rsc &&
1328 !(staterr & IXGBE_RXD_STAT_EOP) &&
1329 !skb->prev) {
1330 /*
1331 * When HWRSC is enabled, delay unmapping
1332 * of the first packet. It carries the
1333 * header information, HW may still
1334 * access the header after the writeback.
1335 * Only unmap it when EOP is reached
1336 */
1337 IXGBE_RSC_CB(skb)->delay_unmap = true;
1338 IXGBE_RSC_CB(skb)->dma = rx_buffer_info->dma;
1339 } else {
1340 dma_unmap_single(rx_ring->dev,
1341 rx_buffer_info->dma,
1342 rx_ring->rx_buf_len,
1343 DMA_FROM_DEVICE);
1344 }
1345 rx_buffer_info->dma = 0;
1346
1347 if (ring_is_ps_enabled(rx_ring)) {
1348 hlen = ixgbe_get_hlen(rx_desc);
1349 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
1350 } else {
1351 hlen = le16_to_cpu(rx_desc->wb.upper.length);
1352 }
1353
1354 skb_put(skb, hlen);
1355 } else {
1356 /* assume packet split since header is unmapped */
1357 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
1358 }
1359
1360 if (upper_len) {
1361 dma_unmap_page(rx_ring->dev,
1362 rx_buffer_info->page_dma,
1363 PAGE_SIZE / 2,
1364 DMA_FROM_DEVICE);
1365 rx_buffer_info->page_dma = 0;
1366 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
1367 rx_buffer_info->page,
1368 rx_buffer_info->page_offset,
1369 upper_len);
1370
1371 if ((page_count(rx_buffer_info->page) == 1) &&
1372 (page_to_nid(rx_buffer_info->page) == current_node))
1373 get_page(rx_buffer_info->page);
1374 else
1375 rx_buffer_info->page = NULL;
1376
1377 skb->len += upper_len;
1378 skb->data_len += upper_len;
1379 skb->truesize += upper_len;
1380 }
1381
1382 i++;
1383 if (i == rx_ring->count)
1384 i = 0;
1385
1386 next_rxd = IXGBE_RX_DESC_ADV(rx_ring, i);
1387 prefetch(next_rxd);
1388 cleaned_count++;
1389
1390 if (pkt_is_rsc) {
1391 u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
1392 IXGBE_RXDADV_NEXTP_SHIFT;
1393 next_buffer = &rx_ring->rx_buffer_info[nextp];
1394 } else {
1395 next_buffer = &rx_ring->rx_buffer_info[i];
1396 }
1397
1398 if (!(staterr & IXGBE_RXD_STAT_EOP)) {
1399 if (ring_is_ps_enabled(rx_ring)) {
1400 rx_buffer_info->skb = next_buffer->skb;
1401 rx_buffer_info->dma = next_buffer->dma;
1402 next_buffer->skb = skb;
1403 next_buffer->dma = 0;
1404 } else {
1405 skb->next = next_buffer->skb;
1406 skb->next->prev = skb;
1407 }
1408 rx_ring->rx_stats.non_eop_descs++;
1409 goto next_desc;
1410 }
1411
1412 if (skb->prev) {
1413 skb = ixgbe_transform_rsc_queue(skb);
1414 /* if we got here without RSC the packet is invalid */
1415 if (!pkt_is_rsc) {
1416 __pskb_trim(skb, 0);
1417 rx_buffer_info->skb = skb;
1418 goto next_desc;
1419 }
1420 }
1421
1422 if (ring_is_rsc_enabled(rx_ring)) {
1423 if (IXGBE_RSC_CB(skb)->delay_unmap) {
1424 dma_unmap_single(rx_ring->dev,
1425 IXGBE_RSC_CB(skb)->dma,
1426 rx_ring->rx_buf_len,
1427 DMA_FROM_DEVICE);
1428 IXGBE_RSC_CB(skb)->dma = 0;
1429 IXGBE_RSC_CB(skb)->delay_unmap = false;
1430 }
1431 }
1432 if (pkt_is_rsc) {
1433 if (ring_is_ps_enabled(rx_ring))
1434 rx_ring->rx_stats.rsc_count +=
1435 skb_shinfo(skb)->nr_frags;
1436 else
1437 rx_ring->rx_stats.rsc_count +=
1438 IXGBE_RSC_CB(skb)->skb_cnt;
1439 rx_ring->rx_stats.rsc_flush++;
1440 }
1441
1442 /* ERR_MASK will only have valid bits if EOP set */
1443 if (unlikely(staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK)) {
1444 dev_kfree_skb_any(skb);
1445 goto next_desc;
1446 }
1447
1448 ixgbe_rx_checksum(adapter, rx_desc, skb, staterr);
1449 if (adapter->netdev->features & NETIF_F_RXHASH)
1450 ixgbe_rx_hash(rx_desc, skb);
1451
1452 /* probably a little skewed due to removing CRC */
1453 total_rx_bytes += skb->len;
1454 total_rx_packets++;
1455
1456 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
1457 #ifdef IXGBE_FCOE
1458 /* if ddp, not passing to ULD unless for FCP_RSP or error */
1459 if (ixgbe_rx_is_fcoe(adapter, rx_desc)) {
1460 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb,
1461 staterr);
1462 if (!ddp_bytes)
1463 goto next_desc;
1464 }
1465 #endif /* IXGBE_FCOE */
1466 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
1467
1468 next_desc:
1469 rx_desc->wb.upper.status_error = 0;
1470
1471 (*work_done)++;
1472 if (*work_done >= work_to_do)
1473 break;
1474
1475 /* return some buffers to hardware, one at a time is too slow */
1476 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
1477 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1478 cleaned_count = 0;
1479 }
1480
1481 /* use prefetched values */
1482 rx_desc = next_rxd;
1483 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1484 }
1485
1486 rx_ring->next_to_clean = i;
1487 cleaned_count = ixgbe_desc_unused(rx_ring);
1488
1489 if (cleaned_count)
1490 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1491
1492 #ifdef IXGBE_FCOE
1493 /* include DDPed FCoE data */
1494 if (ddp_bytes > 0) {
1495 unsigned int mss;
1496
1497 mss = rx_ring->netdev->mtu - sizeof(struct fcoe_hdr) -
1498 sizeof(struct fc_frame_header) -
1499 sizeof(struct fcoe_crc_eof);
1500 if (mss > 512)
1501 mss &= ~511;
1502 total_rx_bytes += ddp_bytes;
1503 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
1504 }
1505 #endif /* IXGBE_FCOE */
1506
1507 u64_stats_update_begin(&rx_ring->syncp);
1508 rx_ring->stats.packets += total_rx_packets;
1509 rx_ring->stats.bytes += total_rx_bytes;
1510 u64_stats_update_end(&rx_ring->syncp);
1511 q_vector->rx.total_packets += total_rx_packets;
1512 q_vector->rx.total_bytes += total_rx_bytes;
1513 }
1514
1515 static int ixgbe_clean_rxonly(struct napi_struct *, int);
1516 /**
1517 * ixgbe_configure_msix - Configure MSI-X hardware
1518 * @adapter: board private structure
1519 *
1520 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
1521 * interrupts.
1522 **/
1523 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
1524 {
1525 struct ixgbe_q_vector *q_vector;
1526 int i, q_vectors, v_idx, r_idx;
1527 u32 mask;
1528
1529 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1530
1531 /*
1532 * Populate the IVAR table and set the ITR values to the
1533 * corresponding register.
1534 */
1535 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1536 q_vector = adapter->q_vector[v_idx];
1537 /* XXX for_each_set_bit(...) */
1538 r_idx = find_first_bit(q_vector->rx.idx,
1539 adapter->num_rx_queues);
1540
1541 for (i = 0; i < q_vector->rx.count; i++) {
1542 u8 reg_idx = adapter->rx_ring[r_idx]->reg_idx;
1543 ixgbe_set_ivar(adapter, 0, reg_idx, v_idx);
1544 r_idx = find_next_bit(q_vector->rx.idx,
1545 adapter->num_rx_queues,
1546 r_idx + 1);
1547 }
1548 r_idx = find_first_bit(q_vector->tx.idx,
1549 adapter->num_tx_queues);
1550
1551 for (i = 0; i < q_vector->tx.count; i++) {
1552 u8 reg_idx = adapter->tx_ring[r_idx]->reg_idx;
1553 ixgbe_set_ivar(adapter, 1, reg_idx, v_idx);
1554 r_idx = find_next_bit(q_vector->tx.idx,
1555 adapter->num_tx_queues,
1556 r_idx + 1);
1557 }
1558
1559 if (q_vector->tx.count && !q_vector->rx.count)
1560 /* tx only */
1561 q_vector->eitr = adapter->tx_eitr_param;
1562 else if (q_vector->rx.count)
1563 /* rx or mixed */
1564 q_vector->eitr = adapter->rx_eitr_param;
1565
1566 ixgbe_write_eitr(q_vector);
1567 /* If ATR is enabled, set interrupt affinity */
1568 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
1569 /*
1570 * Allocate the affinity_hint cpumask, assign the mask
1571 * for this vector, and set our affinity_hint for
1572 * this irq.
1573 */
1574 if (!alloc_cpumask_var(&q_vector->affinity_mask,
1575 GFP_KERNEL))
1576 return;
1577 cpumask_set_cpu(v_idx, q_vector->affinity_mask);
1578 irq_set_affinity_hint(adapter->msix_entries[v_idx].vector,
1579 q_vector->affinity_mask);
1580 }
1581 }
1582
1583 switch (adapter->hw.mac.type) {
1584 case ixgbe_mac_82598EB:
1585 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
1586 v_idx);
1587 break;
1588 case ixgbe_mac_82599EB:
1589 case ixgbe_mac_X540:
1590 ixgbe_set_ivar(adapter, -1, 1, v_idx);
1591 break;
1592
1593 default:
1594 break;
1595 }
1596 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
1597
1598 /* set up to autoclear timer, and the vectors */
1599 mask = IXGBE_EIMS_ENABLE_MASK;
1600 if (adapter->num_vfs)
1601 mask &= ~(IXGBE_EIMS_OTHER |
1602 IXGBE_EIMS_MAILBOX |
1603 IXGBE_EIMS_LSC);
1604 else
1605 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
1606 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
1607 }
1608
1609 enum latency_range {
1610 lowest_latency = 0,
1611 low_latency = 1,
1612 bulk_latency = 2,
1613 latency_invalid = 255
1614 };
1615
1616 /**
1617 * ixgbe_update_itr - update the dynamic ITR value based on statistics
1618 * @q_vector: structure containing interrupt and ring information
1619 * @ring_container: structure containing ring performance data
1620 *
1621 * Stores a new ITR value based on packets and byte
1622 * counts during the last interrupt. The advantage of per interrupt
1623 * computation is faster updates and more accurate ITR for the current
1624 * traffic pattern. Constants in this function were computed
1625 * based on theoretical maximum wire speed and thresholds were set based
1626 * on testing data as well as attempting to minimize response time
1627 * while increasing bulk throughput.
1628 * this functionality is controlled by the InterruptThrottleRate module
1629 * parameter (see ixgbe_param.c)
1630 **/
1631 static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
1632 struct ixgbe_ring_container *ring_container)
1633 {
1634 u64 bytes_perint;
1635 struct ixgbe_adapter *adapter = q_vector->adapter;
1636 int bytes = ring_container->total_bytes;
1637 int packets = ring_container->total_packets;
1638 u32 timepassed_us;
1639 u8 itr_setting = ring_container->itr;
1640
1641 if (packets == 0)
1642 return;
1643
1644 /* simple throttlerate management
1645 * 0-20MB/s lowest (100000 ints/s)
1646 * 20-100MB/s low (20000 ints/s)
1647 * 100-1249MB/s bulk (8000 ints/s)
1648 */
1649 /* what was last interrupt timeslice? */
1650 timepassed_us = 1000000/q_vector->eitr;
1651 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1652
1653 switch (itr_setting) {
1654 case lowest_latency:
1655 if (bytes_perint > adapter->eitr_low)
1656 itr_setting = low_latency;
1657 break;
1658 case low_latency:
1659 if (bytes_perint > adapter->eitr_high)
1660 itr_setting = bulk_latency;
1661 else if (bytes_perint <= adapter->eitr_low)
1662 itr_setting = lowest_latency;
1663 break;
1664 case bulk_latency:
1665 if (bytes_perint <= adapter->eitr_high)
1666 itr_setting = low_latency;
1667 break;
1668 }
1669
1670 /* clear work counters since we have the values we need */
1671 ring_container->total_bytes = 0;
1672 ring_container->total_packets = 0;
1673
1674 /* write updated itr to ring container */
1675 ring_container->itr = itr_setting;
1676 }
1677
1678 /**
1679 * ixgbe_write_eitr - write EITR register in hardware specific way
1680 * @q_vector: structure containing interrupt and ring information
1681 *
1682 * This function is made to be called by ethtool and by the driver
1683 * when it needs to update EITR registers at runtime. Hardware
1684 * specific quirks/differences are taken care of here.
1685 */
1686 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1687 {
1688 struct ixgbe_adapter *adapter = q_vector->adapter;
1689 struct ixgbe_hw *hw = &adapter->hw;
1690 int v_idx = q_vector->v_idx;
1691 u32 itr_reg = EITR_INTS_PER_SEC_TO_REG(q_vector->eitr);
1692
1693 switch (adapter->hw.mac.type) {
1694 case ixgbe_mac_82598EB:
1695 /* must write high and low 16 bits to reset counter */
1696 itr_reg |= (itr_reg << 16);
1697 break;
1698 case ixgbe_mac_82599EB:
1699 case ixgbe_mac_X540:
1700 /*
1701 * 82599 and X540 can support a value of zero, so allow it for
1702 * max interrupt rate, but there is an errata where it can
1703 * not be zero with RSC
1704 */
1705 if (itr_reg == 8 &&
1706 !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
1707 itr_reg = 0;
1708
1709 /*
1710 * set the WDIS bit to not clear the timer bits and cause an
1711 * immediate assertion of the interrupt
1712 */
1713 itr_reg |= IXGBE_EITR_CNT_WDIS;
1714 break;
1715 default:
1716 break;
1717 }
1718 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1719 }
1720
1721 static void ixgbe_set_itr(struct ixgbe_q_vector *q_vector)
1722 {
1723 u32 new_itr = q_vector->eitr;
1724 u8 current_itr;
1725
1726 ixgbe_update_itr(q_vector, &q_vector->tx);
1727 ixgbe_update_itr(q_vector, &q_vector->rx);
1728
1729 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
1730
1731 switch (current_itr) {
1732 /* counts and packets in update_itr are dependent on these numbers */
1733 case lowest_latency:
1734 new_itr = 100000;
1735 break;
1736 case low_latency:
1737 new_itr = 20000; /* aka hwitr = ~200 */
1738 break;
1739 case bulk_latency:
1740 new_itr = 8000;
1741 break;
1742 default:
1743 break;
1744 }
1745
1746 if (new_itr != q_vector->eitr) {
1747 /* do an exponential smoothing */
1748 new_itr = ((q_vector->eitr * 9) + new_itr)/10;
1749
1750 /* save the algorithm value here */
1751 q_vector->eitr = new_itr;
1752
1753 ixgbe_write_eitr(q_vector);
1754 }
1755 }
1756
1757 /**
1758 * ixgbe_check_overtemp_subtask - check for over tempurature
1759 * @adapter: pointer to adapter
1760 **/
1761 static void ixgbe_check_overtemp_subtask(struct ixgbe_adapter *adapter)
1762 {
1763 struct ixgbe_hw *hw = &adapter->hw;
1764 u32 eicr = adapter->interrupt_event;
1765
1766 if (test_bit(__IXGBE_DOWN, &adapter->state))
1767 return;
1768
1769 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
1770 !(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_EVENT))
1771 return;
1772
1773 adapter->flags2 &= ~IXGBE_FLAG2_TEMP_SENSOR_EVENT;
1774
1775 switch (hw->device_id) {
1776 case IXGBE_DEV_ID_82599_T3_LOM:
1777 /*
1778 * Since the warning interrupt is for both ports
1779 * we don't have to check if:
1780 * - This interrupt wasn't for our port.
1781 * - We may have missed the interrupt so always have to
1782 * check if we got a LSC
1783 */
1784 if (!(eicr & IXGBE_EICR_GPI_SDP0) &&
1785 !(eicr & IXGBE_EICR_LSC))
1786 return;
1787
1788 if (!(eicr & IXGBE_EICR_LSC) && hw->mac.ops.check_link) {
1789 u32 autoneg;
1790 bool link_up = false;
1791
1792 hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
1793
1794 if (link_up)
1795 return;
1796 }
1797
1798 /* Check if this is not due to overtemp */
1799 if (hw->phy.ops.check_overtemp(hw) != IXGBE_ERR_OVERTEMP)
1800 return;
1801
1802 break;
1803 default:
1804 if (!(eicr & IXGBE_EICR_GPI_SDP0))
1805 return;
1806 break;
1807 }
1808 e_crit(drv,
1809 "Network adapter has been stopped because it has over heated. "
1810 "Restart the computer. If the problem persists, "
1811 "power off the system and replace the adapter\n");
1812
1813 adapter->interrupt_event = 0;
1814 }
1815
1816 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1817 {
1818 struct ixgbe_hw *hw = &adapter->hw;
1819
1820 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1821 (eicr & IXGBE_EICR_GPI_SDP1)) {
1822 e_crit(probe, "Fan has stopped, replace the adapter\n");
1823 /* write to clear the interrupt */
1824 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1825 }
1826 }
1827
1828 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1829 {
1830 struct ixgbe_hw *hw = &adapter->hw;
1831
1832 if (eicr & IXGBE_EICR_GPI_SDP2) {
1833 /* Clear the interrupt */
1834 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1835 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1836 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
1837 ixgbe_service_event_schedule(adapter);
1838 }
1839 }
1840
1841 if (eicr & IXGBE_EICR_GPI_SDP1) {
1842 /* Clear the interrupt */
1843 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1844 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1845 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
1846 ixgbe_service_event_schedule(adapter);
1847 }
1848 }
1849 }
1850
1851 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1852 {
1853 struct ixgbe_hw *hw = &adapter->hw;
1854
1855 adapter->lsc_int++;
1856 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1857 adapter->link_check_timeout = jiffies;
1858 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1859 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1860 IXGBE_WRITE_FLUSH(hw);
1861 ixgbe_service_event_schedule(adapter);
1862 }
1863 }
1864
1865 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1866 {
1867 struct ixgbe_adapter *adapter = data;
1868 struct ixgbe_hw *hw = &adapter->hw;
1869 u32 eicr;
1870
1871 /*
1872 * Workaround for Silicon errata. Use clear-by-write instead
1873 * of clear-by-read. Reading with EICS will return the
1874 * interrupt causes without clearing, which later be done
1875 * with the write to EICR.
1876 */
1877 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1878 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1879
1880 if (eicr & IXGBE_EICR_LSC)
1881 ixgbe_check_lsc(adapter);
1882
1883 if (eicr & IXGBE_EICR_MAILBOX)
1884 ixgbe_msg_task(adapter);
1885
1886 switch (hw->mac.type) {
1887 case ixgbe_mac_82599EB:
1888 case ixgbe_mac_X540:
1889 /* Handle Flow Director Full threshold interrupt */
1890 if (eicr & IXGBE_EICR_FLOW_DIR) {
1891 int reinit_count = 0;
1892 int i;
1893 for (i = 0; i < adapter->num_tx_queues; i++) {
1894 struct ixgbe_ring *ring = adapter->tx_ring[i];
1895 if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE,
1896 &ring->state))
1897 reinit_count++;
1898 }
1899 if (reinit_count) {
1900 /* no more flow director interrupts until after init */
1901 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_FLOW_DIR);
1902 eicr &= ~IXGBE_EICR_FLOW_DIR;
1903 adapter->flags2 |= IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
1904 ixgbe_service_event_schedule(adapter);
1905 }
1906 }
1907 ixgbe_check_sfp_event(adapter, eicr);
1908 if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
1909 ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC))) {
1910 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1911 adapter->interrupt_event = eicr;
1912 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
1913 ixgbe_service_event_schedule(adapter);
1914 }
1915 }
1916 break;
1917 default:
1918 break;
1919 }
1920
1921 ixgbe_check_fan_failure(adapter, eicr);
1922
1923 /* re-enable the original interrupt state, no lsc, no queues */
1924 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1925 IXGBE_WRITE_REG(hw, IXGBE_EIMS, eicr &
1926 ~(IXGBE_EIMS_LSC | IXGBE_EIMS_RTX_QUEUE));
1927
1928 return IRQ_HANDLED;
1929 }
1930
1931 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1932 u64 qmask)
1933 {
1934 u32 mask;
1935 struct ixgbe_hw *hw = &adapter->hw;
1936
1937 switch (hw->mac.type) {
1938 case ixgbe_mac_82598EB:
1939 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1940 IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
1941 break;
1942 case ixgbe_mac_82599EB:
1943 case ixgbe_mac_X540:
1944 mask = (qmask & 0xFFFFFFFF);
1945 if (mask)
1946 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
1947 mask = (qmask >> 32);
1948 if (mask)
1949 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
1950 break;
1951 default:
1952 break;
1953 }
1954 /* skip the flush */
1955 }
1956
1957 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1958 u64 qmask)
1959 {
1960 u32 mask;
1961 struct ixgbe_hw *hw = &adapter->hw;
1962
1963 switch (hw->mac.type) {
1964 case ixgbe_mac_82598EB:
1965 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1966 IXGBE_WRITE_REG(hw, IXGBE_EIMC, mask);
1967 break;
1968 case ixgbe_mac_82599EB:
1969 case ixgbe_mac_X540:
1970 mask = (qmask & 0xFFFFFFFF);
1971 if (mask)
1972 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(0), mask);
1973 mask = (qmask >> 32);
1974 if (mask)
1975 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(1), mask);
1976 break;
1977 default:
1978 break;
1979 }
1980 /* skip the flush */
1981 }
1982
1983 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
1984 {
1985 struct ixgbe_q_vector *q_vector = data;
1986 struct ixgbe_adapter *adapter = q_vector->adapter;
1987 struct ixgbe_ring *tx_ring;
1988 int i, r_idx;
1989
1990 if (!q_vector->tx.count)
1991 return IRQ_HANDLED;
1992
1993 r_idx = find_first_bit(q_vector->tx.idx, adapter->num_tx_queues);
1994 for (i = 0; i < q_vector->tx.count; i++) {
1995 tx_ring = adapter->tx_ring[r_idx];
1996 r_idx = find_next_bit(q_vector->tx.idx, adapter->num_tx_queues,
1997 r_idx + 1);
1998 }
1999
2000 /* EIAM disabled interrupts (on this vector) for us */
2001 napi_schedule(&q_vector->napi);
2002
2003 return IRQ_HANDLED;
2004 }
2005
2006 /**
2007 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
2008 * @irq: unused
2009 * @data: pointer to our q_vector struct for this interrupt vector
2010 **/
2011 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
2012 {
2013 struct ixgbe_q_vector *q_vector = data;
2014 struct ixgbe_adapter *adapter = q_vector->adapter;
2015 struct ixgbe_ring *rx_ring;
2016 int r_idx;
2017 int i;
2018
2019 #ifdef CONFIG_IXGBE_DCA
2020 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2021 ixgbe_update_dca(q_vector);
2022 #endif
2023
2024 r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
2025 for (i = 0; i < q_vector->rx.count; i++) {
2026 rx_ring = adapter->rx_ring[r_idx];
2027 r_idx = find_next_bit(q_vector->rx.idx, adapter->num_rx_queues,
2028 r_idx + 1);
2029 }
2030
2031 if (!q_vector->rx.count)
2032 return IRQ_HANDLED;
2033
2034 /* EIAM disabled interrupts (on this vector) for us */
2035 napi_schedule(&q_vector->napi);
2036
2037 return IRQ_HANDLED;
2038 }
2039
2040 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
2041 {
2042 struct ixgbe_q_vector *q_vector = data;
2043 struct ixgbe_adapter *adapter = q_vector->adapter;
2044 struct ixgbe_ring *ring;
2045 int r_idx;
2046 int i;
2047
2048 if (!q_vector->tx.count && !q_vector->rx.count)
2049 return IRQ_HANDLED;
2050
2051 r_idx = find_first_bit(q_vector->tx.idx, adapter->num_tx_queues);
2052 for (i = 0; i < q_vector->tx.count; i++) {
2053 ring = adapter->tx_ring[r_idx];
2054 r_idx = find_next_bit(q_vector->tx.idx, adapter->num_tx_queues,
2055 r_idx + 1);
2056 }
2057
2058 r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
2059 for (i = 0; i < q_vector->rx.count; i++) {
2060 ring = adapter->rx_ring[r_idx];
2061 r_idx = find_next_bit(q_vector->rx.idx, adapter->num_rx_queues,
2062 r_idx + 1);
2063 }
2064
2065 /* EIAM disabled interrupts (on this vector) for us */
2066 napi_schedule(&q_vector->napi);
2067
2068 return IRQ_HANDLED;
2069 }
2070
2071 /**
2072 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
2073 * @napi: napi struct with our devices info in it
2074 * @budget: amount of work driver is allowed to do this pass, in packets
2075 *
2076 * This function is optimized for cleaning one queue only on a single
2077 * q_vector!!!
2078 **/
2079 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
2080 {
2081 struct ixgbe_q_vector *q_vector =
2082 container_of(napi, struct ixgbe_q_vector, napi);
2083 struct ixgbe_adapter *adapter = q_vector->adapter;
2084 struct ixgbe_ring *rx_ring = NULL;
2085 int work_done = 0;
2086 long r_idx;
2087
2088 #ifdef CONFIG_IXGBE_DCA
2089 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2090 ixgbe_update_dca(q_vector);
2091 #endif
2092
2093 r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
2094 rx_ring = adapter->rx_ring[r_idx];
2095
2096 ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
2097
2098 /* If all Rx work done, exit the polling mode */
2099 if (work_done < budget) {
2100 napi_complete(napi);
2101 if (adapter->rx_itr_setting & 1)
2102 ixgbe_set_itr(q_vector);
2103 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2104 ixgbe_irq_enable_queues(adapter,
2105 ((u64)1 << q_vector->v_idx));
2106 }
2107
2108 return work_done;
2109 }
2110
2111 /**
2112 * ixgbe_clean_rxtx_many - msix (aka one shot) rx clean routine
2113 * @napi: napi struct with our devices info in it
2114 * @budget: amount of work driver is allowed to do this pass, in packets
2115 *
2116 * This function will clean more than one rx queue associated with a
2117 * q_vector.
2118 **/
2119 static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
2120 {
2121 struct ixgbe_q_vector *q_vector =
2122 container_of(napi, struct ixgbe_q_vector, napi);
2123 struct ixgbe_adapter *adapter = q_vector->adapter;
2124 struct ixgbe_ring *ring = NULL;
2125 int work_done = 0, i;
2126 long r_idx;
2127 bool tx_clean_complete = true;
2128
2129 #ifdef CONFIG_IXGBE_DCA
2130 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2131 ixgbe_update_dca(q_vector);
2132 #endif
2133
2134 r_idx = find_first_bit(q_vector->tx.idx, adapter->num_tx_queues);
2135 for (i = 0; i < q_vector->tx.count; i++) {
2136 ring = adapter->tx_ring[r_idx];
2137 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
2138 r_idx = find_next_bit(q_vector->tx.idx, adapter->num_tx_queues,
2139 r_idx + 1);
2140 }
2141
2142 /* attempt to distribute budget to each queue fairly, but don't allow
2143 * the budget to go below 1 because we'll exit polling */
2144 budget /= (q_vector->rx.count ?: 1);
2145 budget = max(budget, 1);
2146 r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
2147 for (i = 0; i < q_vector->rx.count; i++) {
2148 ring = adapter->rx_ring[r_idx];
2149 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
2150 r_idx = find_next_bit(q_vector->rx.idx, adapter->num_rx_queues,
2151 r_idx + 1);
2152 }
2153
2154 r_idx = find_first_bit(q_vector->rx.idx, adapter->num_rx_queues);
2155 ring = adapter->rx_ring[r_idx];
2156 /* If all Rx work done, exit the polling mode */
2157 if (work_done < budget) {
2158 napi_complete(napi);
2159 if (adapter->rx_itr_setting & 1)
2160 ixgbe_set_itr(q_vector);
2161 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2162 ixgbe_irq_enable_queues(adapter,
2163 ((u64)1 << q_vector->v_idx));
2164 return 0;
2165 }
2166
2167 return work_done;
2168 }
2169
2170 /**
2171 * ixgbe_clean_txonly - msix (aka one shot) tx clean routine
2172 * @napi: napi struct with our devices info in it
2173 * @budget: amount of work driver is allowed to do this pass, in packets
2174 *
2175 * This function is optimized for cleaning one queue only on a single
2176 * q_vector!!!
2177 **/
2178 static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
2179 {
2180 struct ixgbe_q_vector *q_vector =
2181 container_of(napi, struct ixgbe_q_vector, napi);
2182 struct ixgbe_adapter *adapter = q_vector->adapter;
2183 struct ixgbe_ring *tx_ring = NULL;
2184 int work_done = 0;
2185 long r_idx;
2186
2187 #ifdef CONFIG_IXGBE_DCA
2188 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2189 ixgbe_update_dca(q_vector);
2190 #endif
2191
2192 r_idx = find_first_bit(q_vector->tx.idx, adapter->num_tx_queues);
2193 tx_ring = adapter->tx_ring[r_idx];
2194
2195 if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
2196 work_done = budget;
2197
2198 /* If all Tx work done, exit the polling mode */
2199 if (work_done < budget) {
2200 napi_complete(napi);
2201 if (adapter->tx_itr_setting & 1)
2202 ixgbe_set_itr(q_vector);
2203 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2204 ixgbe_irq_enable_queues(adapter,
2205 ((u64)1 << q_vector->v_idx));
2206 }
2207
2208 return work_done;
2209 }
2210
2211 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
2212 int r_idx)
2213 {
2214 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2215 struct ixgbe_ring *rx_ring = a->rx_ring[r_idx];
2216
2217 set_bit(r_idx, q_vector->rx.idx);
2218 q_vector->rx.count++;
2219 rx_ring->q_vector = q_vector;
2220 }
2221
2222 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
2223 int t_idx)
2224 {
2225 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2226 struct ixgbe_ring *tx_ring = a->tx_ring[t_idx];
2227
2228 set_bit(t_idx, q_vector->tx.idx);
2229 q_vector->tx.count++;
2230 tx_ring->q_vector = q_vector;
2231 q_vector->tx.work_limit = a->tx_work_limit;
2232 }
2233
2234 /**
2235 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
2236 * @adapter: board private structure to initialize
2237 *
2238 * This function maps descriptor rings to the queue-specific vectors
2239 * we were allotted through the MSI-X enabling code. Ideally, we'd have
2240 * one vector per ring/queue, but on a constrained vector budget, we
2241 * group the rings as "efficiently" as possible. You would add new
2242 * mapping configurations in here.
2243 **/
2244 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter)
2245 {
2246 int q_vectors;
2247 int v_start = 0;
2248 int rxr_idx = 0, txr_idx = 0;
2249 int rxr_remaining = adapter->num_rx_queues;
2250 int txr_remaining = adapter->num_tx_queues;
2251 int i, j;
2252 int rqpv, tqpv;
2253 int err = 0;
2254
2255 /* No mapping required if MSI-X is disabled. */
2256 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2257 goto out;
2258
2259 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2260
2261 /*
2262 * The ideal configuration...
2263 * We have enough vectors to map one per queue.
2264 */
2265 if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
2266 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
2267 map_vector_to_rxq(adapter, v_start, rxr_idx);
2268
2269 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
2270 map_vector_to_txq(adapter, v_start, txr_idx);
2271
2272 goto out;
2273 }
2274
2275 /*
2276 * If we don't have enough vectors for a 1-to-1
2277 * mapping, we'll have to group them so there are
2278 * multiple queues per vector.
2279 */
2280 /* Re-adjusting *qpv takes care of the remainder. */
2281 for (i = v_start; i < q_vectors; i++) {
2282 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
2283 for (j = 0; j < rqpv; j++) {
2284 map_vector_to_rxq(adapter, i, rxr_idx);
2285 rxr_idx++;
2286 rxr_remaining--;
2287 }
2288 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
2289 for (j = 0; j < tqpv; j++) {
2290 map_vector_to_txq(adapter, i, txr_idx);
2291 txr_idx++;
2292 txr_remaining--;
2293 }
2294 }
2295 out:
2296 return err;
2297 }
2298
2299 /**
2300 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2301 * @adapter: board private structure
2302 *
2303 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2304 * interrupts from the kernel.
2305 **/
2306 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2307 {
2308 struct net_device *netdev = adapter->netdev;
2309 irqreturn_t (*handler)(int, void *);
2310 int i, vector, q_vectors, err;
2311 int ri = 0, ti = 0;
2312
2313 /* Decrement for Other and TCP Timer vectors */
2314 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2315
2316 err = ixgbe_map_rings_to_vectors(adapter);
2317 if (err)
2318 return err;
2319
2320 #define SET_HANDLER(_v) (((_v)->rx.count && (_v)->tx.count) \
2321 ? &ixgbe_msix_clean_many : \
2322 (_v)->rx.count ? &ixgbe_msix_clean_rx : \
2323 (_v)->tx.count ? &ixgbe_msix_clean_tx : \
2324 NULL)
2325 for (vector = 0; vector < q_vectors; vector++) {
2326 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
2327 handler = SET_HANDLER(q_vector);
2328
2329 if (handler == &ixgbe_msix_clean_rx) {
2330 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2331 "%s-%s-%d", netdev->name, "rx", ri++);
2332 } else if (handler == &ixgbe_msix_clean_tx) {
2333 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2334 "%s-%s-%d", netdev->name, "tx", ti++);
2335 } else if (handler == &ixgbe_msix_clean_many) {
2336 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2337 "%s-%s-%d", netdev->name, "TxRx", ri++);
2338 ti++;
2339 } else {
2340 /* skip this unused q_vector */
2341 continue;
2342 }
2343 err = request_irq(adapter->msix_entries[vector].vector,
2344 handler, 0, q_vector->name,
2345 q_vector);
2346 if (err) {
2347 e_err(probe, "request_irq failed for MSIX interrupt "
2348 "Error: %d\n", err);
2349 goto free_queue_irqs;
2350 }
2351 }
2352
2353 sprintf(adapter->lsc_int_name, "%s:lsc", netdev->name);
2354 err = request_irq(adapter->msix_entries[vector].vector,
2355 ixgbe_msix_lsc, 0, adapter->lsc_int_name, adapter);
2356 if (err) {
2357 e_err(probe, "request_irq for msix_lsc failed: %d\n", err);
2358 goto free_queue_irqs;
2359 }
2360
2361 return 0;
2362
2363 free_queue_irqs:
2364 for (i = vector - 1; i >= 0; i--)
2365 free_irq(adapter->msix_entries[--vector].vector,
2366 adapter->q_vector[i]);
2367 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2368 pci_disable_msix(adapter->pdev);
2369 kfree(adapter->msix_entries);
2370 adapter->msix_entries = NULL;
2371 return err;
2372 }
2373
2374 /**
2375 * ixgbe_irq_enable - Enable default interrupt generation settings
2376 * @adapter: board private structure
2377 **/
2378 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
2379 bool flush)
2380 {
2381 u32 mask;
2382
2383 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
2384 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
2385 mask |= IXGBE_EIMS_GPI_SDP0;
2386 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
2387 mask |= IXGBE_EIMS_GPI_SDP1;
2388 switch (adapter->hw.mac.type) {
2389 case ixgbe_mac_82599EB:
2390 case ixgbe_mac_X540:
2391 mask |= IXGBE_EIMS_ECC;
2392 mask |= IXGBE_EIMS_GPI_SDP1;
2393 mask |= IXGBE_EIMS_GPI_SDP2;
2394 if (adapter->num_vfs)
2395 mask |= IXGBE_EIMS_MAILBOX;
2396 break;
2397 default:
2398 break;
2399 }
2400 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
2401 mask |= IXGBE_EIMS_FLOW_DIR;
2402
2403 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
2404 if (queues)
2405 ixgbe_irq_enable_queues(adapter, ~0);
2406 if (flush)
2407 IXGBE_WRITE_FLUSH(&adapter->hw);
2408
2409 if (adapter->num_vfs > 32) {
2410 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
2411 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
2412 }
2413 }
2414
2415 /**
2416 * ixgbe_intr - legacy mode Interrupt Handler
2417 * @irq: interrupt number
2418 * @data: pointer to a network interface device structure
2419 **/
2420 static irqreturn_t ixgbe_intr(int irq, void *data)
2421 {
2422 struct ixgbe_adapter *adapter = data;
2423 struct ixgbe_hw *hw = &adapter->hw;
2424 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2425 u32 eicr;
2426
2427 /*
2428 * Workaround for silicon errata on 82598. Mask the interrupts
2429 * before the read of EICR.
2430 */
2431 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2432
2433 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2434 * therefore no explict interrupt disable is necessary */
2435 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2436 if (!eicr) {
2437 /*
2438 * shared interrupt alert!
2439 * make sure interrupts are enabled because the read will
2440 * have disabled interrupts due to EIAM
2441 * finish the workaround of silicon errata on 82598. Unmask
2442 * the interrupt that we masked before the EICR read.
2443 */
2444 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2445 ixgbe_irq_enable(adapter, true, true);
2446 return IRQ_NONE; /* Not our interrupt */
2447 }
2448
2449 if (eicr & IXGBE_EICR_LSC)
2450 ixgbe_check_lsc(adapter);
2451
2452 switch (hw->mac.type) {
2453 case ixgbe_mac_82599EB:
2454 ixgbe_check_sfp_event(adapter, eicr);
2455 if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
2456 ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC))) {
2457 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2458 adapter->interrupt_event = eicr;
2459 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2460 ixgbe_service_event_schedule(adapter);
2461 }
2462 }
2463 break;
2464 default:
2465 break;
2466 }
2467
2468 ixgbe_check_fan_failure(adapter, eicr);
2469
2470 if (napi_schedule_prep(&(q_vector->napi))) {
2471 /* would disable interrupts here but EIAM disabled it */
2472 __napi_schedule(&(q_vector->napi));
2473 }
2474
2475 /*
2476 * re-enable link(maybe) and non-queue interrupts, no flush.
2477 * ixgbe_poll will re-enable the queue interrupts
2478 */
2479
2480 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2481 ixgbe_irq_enable(adapter, false, false);
2482
2483 return IRQ_HANDLED;
2484 }
2485
2486 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
2487 {
2488 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2489
2490 for (i = 0; i < q_vectors; i++) {
2491 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
2492 bitmap_zero(q_vector->rx.idx, MAX_RX_QUEUES);
2493 bitmap_zero(q_vector->tx.idx, MAX_TX_QUEUES);
2494 q_vector->rx.count = 0;
2495 q_vector->tx.count = 0;
2496 }
2497 }
2498
2499 /**
2500 * ixgbe_request_irq - initialize interrupts
2501 * @adapter: board private structure
2502 *
2503 * Attempts to configure interrupts using the best available
2504 * capabilities of the hardware and kernel.
2505 **/
2506 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
2507 {
2508 struct net_device *netdev = adapter->netdev;
2509 int err;
2510
2511 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2512 err = ixgbe_request_msix_irqs(adapter);
2513 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
2514 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
2515 netdev->name, adapter);
2516 } else {
2517 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
2518 netdev->name, adapter);
2519 }
2520
2521 if (err)
2522 e_err(probe, "request_irq failed, Error %d\n", err);
2523
2524 return err;
2525 }
2526
2527 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
2528 {
2529 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2530 int i, q_vectors;
2531
2532 q_vectors = adapter->num_msix_vectors;
2533
2534 i = q_vectors - 1;
2535 free_irq(adapter->msix_entries[i].vector, adapter);
2536
2537 i--;
2538 for (; i >= 0; i--) {
2539 /* free only the irqs that were actually requested */
2540 if (!adapter->q_vector[i]->rx.count &&
2541 !adapter->q_vector[i]->tx.count)
2542 continue;
2543
2544 free_irq(adapter->msix_entries[i].vector,
2545 adapter->q_vector[i]);
2546 }
2547
2548 ixgbe_reset_q_vectors(adapter);
2549 } else {
2550 free_irq(adapter->pdev->irq, adapter);
2551 }
2552 }
2553
2554 /**
2555 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
2556 * @adapter: board private structure
2557 **/
2558 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
2559 {
2560 switch (adapter->hw.mac.type) {
2561 case ixgbe_mac_82598EB:
2562 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
2563 break;
2564 case ixgbe_mac_82599EB:
2565 case ixgbe_mac_X540:
2566 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
2567 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
2568 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
2569 if (adapter->num_vfs > 32)
2570 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
2571 break;
2572 default:
2573 break;
2574 }
2575 IXGBE_WRITE_FLUSH(&adapter->hw);
2576 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2577 int i;
2578 for (i = 0; i < adapter->num_msix_vectors; i++)
2579 synchronize_irq(adapter->msix_entries[i].vector);
2580 } else {
2581 synchronize_irq(adapter->pdev->irq);
2582 }
2583 }
2584
2585 /**
2586 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
2587 *
2588 **/
2589 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
2590 {
2591 struct ixgbe_hw *hw = &adapter->hw;
2592
2593 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
2594 EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr_param));
2595
2596 ixgbe_set_ivar(adapter, 0, 0, 0);
2597 ixgbe_set_ivar(adapter, 1, 0, 0);
2598
2599 map_vector_to_rxq(adapter, 0, 0);
2600 map_vector_to_txq(adapter, 0, 0);
2601
2602 e_info(hw, "Legacy interrupt IVAR setup done\n");
2603 }
2604
2605 /**
2606 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
2607 * @adapter: board private structure
2608 * @ring: structure containing ring specific data
2609 *
2610 * Configure the Tx descriptor ring after a reset.
2611 **/
2612 void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
2613 struct ixgbe_ring *ring)
2614 {
2615 struct ixgbe_hw *hw = &adapter->hw;
2616 u64 tdba = ring->dma;
2617 int wait_loop = 10;
2618 u32 txdctl;
2619 u8 reg_idx = ring->reg_idx;
2620
2621 /* disable queue to avoid issues while updating state */
2622 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2623 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx),
2624 txdctl & ~IXGBE_TXDCTL_ENABLE);
2625 IXGBE_WRITE_FLUSH(hw);
2626
2627 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
2628 (tdba & DMA_BIT_MASK(32)));
2629 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
2630 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
2631 ring->count * sizeof(union ixgbe_adv_tx_desc));
2632 IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
2633 IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
2634 ring->tail = hw->hw_addr + IXGBE_TDT(reg_idx);
2635
2636 /* configure fetching thresholds */
2637 if (adapter->rx_itr_setting == 0) {
2638 /* cannot set wthresh when itr==0 */
2639 txdctl &= ~0x007F0000;
2640 } else {
2641 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
2642 txdctl |= (8 << 16);
2643 }
2644 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2645 /* PThresh workaround for Tx hang with DFP enabled. */
2646 txdctl |= 32;
2647 }
2648
2649 /* reinitialize flowdirector state */
2650 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
2651 adapter->atr_sample_rate) {
2652 ring->atr_sample_rate = adapter->atr_sample_rate;
2653 ring->atr_count = 0;
2654 set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state);
2655 } else {
2656 ring->atr_sample_rate = 0;
2657 }
2658
2659 clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state);
2660
2661 /* enable queue */
2662 txdctl |= IXGBE_TXDCTL_ENABLE;
2663 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
2664
2665 /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2666 if (hw->mac.type == ixgbe_mac_82598EB &&
2667 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2668 return;
2669
2670 /* poll to verify queue is enabled */
2671 do {
2672 usleep_range(1000, 2000);
2673 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2674 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
2675 if (!wait_loop)
2676 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx);
2677 }
2678
2679 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
2680 {
2681 struct ixgbe_hw *hw = &adapter->hw;
2682 u32 rttdcs;
2683 u32 reg;
2684 u8 tcs = netdev_get_num_tc(adapter->netdev);
2685
2686 if (hw->mac.type == ixgbe_mac_82598EB)
2687 return;
2688
2689 /* disable the arbiter while setting MTQC */
2690 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
2691 rttdcs |= IXGBE_RTTDCS_ARBDIS;
2692 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2693
2694 /* set transmit pool layout */
2695 switch (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
2696 case (IXGBE_FLAG_SRIOV_ENABLED):
2697 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2698 (IXGBE_MTQC_VT_ENA | IXGBE_MTQC_64VF));
2699 break;
2700 default:
2701 if (!tcs)
2702 reg = IXGBE_MTQC_64Q_1PB;
2703 else if (tcs <= 4)
2704 reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
2705 else
2706 reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
2707
2708 IXGBE_WRITE_REG(hw, IXGBE_MTQC, reg);
2709
2710 /* Enable Security TX Buffer IFG for multiple pb */
2711 if (tcs) {
2712 reg = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);
2713 reg |= IXGBE_SECTX_DCB;
2714 IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, reg);
2715 }
2716 break;
2717 }
2718
2719 /* re-enable the arbiter */
2720 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
2721 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2722 }
2723
2724 /**
2725 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
2726 * @adapter: board private structure
2727 *
2728 * Configure the Tx unit of the MAC after a reset.
2729 **/
2730 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
2731 {
2732 struct ixgbe_hw *hw = &adapter->hw;
2733 u32 dmatxctl;
2734 u32 i;
2735
2736 ixgbe_setup_mtqc(adapter);
2737
2738 if (hw->mac.type != ixgbe_mac_82598EB) {
2739 /* DMATXCTL.EN must be before Tx queues are enabled */
2740 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2741 dmatxctl |= IXGBE_DMATXCTL_TE;
2742 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2743 }
2744
2745 /* Setup the HW Tx Head and Tail descriptor pointers */
2746 for (i = 0; i < adapter->num_tx_queues; i++)
2747 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
2748 }
2749
2750 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
2751
2752 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
2753 struct ixgbe_ring *rx_ring)
2754 {
2755 u32 srrctl;
2756 u8 reg_idx = rx_ring->reg_idx;
2757
2758 switch (adapter->hw.mac.type) {
2759 case ixgbe_mac_82598EB: {
2760 struct ixgbe_ring_feature *feature = adapter->ring_feature;
2761 const int mask = feature[RING_F_RSS].mask;
2762 reg_idx = reg_idx & mask;
2763 }
2764 break;
2765 case ixgbe_mac_82599EB:
2766 case ixgbe_mac_X540:
2767 default:
2768 break;
2769 }
2770
2771 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(reg_idx));
2772
2773 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
2774 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
2775 if (adapter->num_vfs)
2776 srrctl |= IXGBE_SRRCTL_DROP_EN;
2777
2778 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
2779 IXGBE_SRRCTL_BSIZEHDR_MASK;
2780
2781 if (ring_is_ps_enabled(rx_ring)) {
2782 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
2783 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2784 #else
2785 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2786 #endif
2787 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
2788 } else {
2789 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
2790 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2791 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
2792 }
2793
2794 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(reg_idx), srrctl);
2795 }
2796
2797 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
2798 {
2799 struct ixgbe_hw *hw = &adapter->hw;
2800 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2801 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2802 0x6A3E67EA, 0x14364D17, 0x3BED200D};
2803 u32 mrqc = 0, reta = 0;
2804 u32 rxcsum;
2805 int i, j;
2806 u8 tcs = netdev_get_num_tc(adapter->netdev);
2807 int maxq = adapter->ring_feature[RING_F_RSS].indices;
2808
2809 if (tcs)
2810 maxq = min(maxq, adapter->num_tx_queues / tcs);
2811
2812 /* Fill out hash function seeds */
2813 for (i = 0; i < 10; i++)
2814 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2815
2816 /* Fill out redirection table */
2817 for (i = 0, j = 0; i < 128; i++, j++) {
2818 if (j == maxq)
2819 j = 0;
2820 /* reta = 4-byte sliding window of
2821 * 0x00..(indices-1)(indices-1)00..etc. */
2822 reta = (reta << 8) | (j * 0x11);
2823 if ((i & 3) == 3)
2824 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2825 }
2826
2827 /* Disable indicating checksum in descriptor, enables RSS hash */
2828 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2829 rxcsum |= IXGBE_RXCSUM_PCSD;
2830 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2831
2832 if (adapter->hw.mac.type == ixgbe_mac_82598EB &&
2833 (adapter->flags & IXGBE_FLAG_RSS_ENABLED)) {
2834 mrqc = IXGBE_MRQC_RSSEN;
2835 } else {
2836 int mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
2837 | IXGBE_FLAG_SRIOV_ENABLED);
2838
2839 switch (mask) {
2840 case (IXGBE_FLAG_RSS_ENABLED):
2841 if (!tcs)
2842 mrqc = IXGBE_MRQC_RSSEN;
2843 else if (tcs <= 4)
2844 mrqc = IXGBE_MRQC_RTRSS4TCEN;
2845 else
2846 mrqc = IXGBE_MRQC_RTRSS8TCEN;
2847 break;
2848 case (IXGBE_FLAG_SRIOV_ENABLED):
2849 mrqc = IXGBE_MRQC_VMDQEN;
2850 break;
2851 default:
2852 break;
2853 }
2854 }
2855
2856 /* Perform hash on these packet types */
2857 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2858 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2859 | IXGBE_MRQC_RSS_FIELD_IPV6
2860 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
2861
2862 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2863 }
2864
2865 /**
2866 * ixgbe_configure_rscctl - enable RSC for the indicated ring
2867 * @adapter: address of board private structure
2868 * @index: index of ring to set
2869 **/
2870 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
2871 struct ixgbe_ring *ring)
2872 {
2873 struct ixgbe_hw *hw = &adapter->hw;
2874 u32 rscctrl;
2875 int rx_buf_len;
2876 u8 reg_idx = ring->reg_idx;
2877
2878 if (!ring_is_rsc_enabled(ring))
2879 return;
2880
2881 rx_buf_len = ring->rx_buf_len;
2882 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
2883 rscctrl |= IXGBE_RSCCTL_RSCEN;
2884 /*
2885 * we must limit the number of descriptors so that the
2886 * total size of max desc * buf_len is not greater
2887 * than 65535
2888 */
2889 if (ring_is_ps_enabled(ring)) {
2890 #if (MAX_SKB_FRAGS > 16)
2891 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2892 #elif (MAX_SKB_FRAGS > 8)
2893 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2894 #elif (MAX_SKB_FRAGS > 4)
2895 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2896 #else
2897 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2898 #endif
2899 } else {
2900 if (rx_buf_len < IXGBE_RXBUFFER_4096)
2901 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2902 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
2903 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2904 else
2905 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2906 }
2907 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
2908 }
2909
2910 /**
2911 * ixgbe_set_uta - Set unicast filter table address
2912 * @adapter: board private structure
2913 *
2914 * The unicast table address is a register array of 32-bit registers.
2915 * The table is meant to be used in a way similar to how the MTA is used
2916 * however due to certain limitations in the hardware it is necessary to
2917 * set all the hash bits to 1 and use the VMOLR ROPE bit as a promiscuous
2918 * enable bit to allow vlan tag stripping when promiscuous mode is enabled
2919 **/
2920 static void ixgbe_set_uta(struct ixgbe_adapter *adapter)
2921 {
2922 struct ixgbe_hw *hw = &adapter->hw;
2923 int i;
2924
2925 /* The UTA table only exists on 82599 hardware and newer */
2926 if (hw->mac.type < ixgbe_mac_82599EB)
2927 return;
2928
2929 /* we only need to do this if VMDq is enabled */
2930 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
2931 return;
2932
2933 for (i = 0; i < 128; i++)
2934 IXGBE_WRITE_REG(hw, IXGBE_UTA(i), ~0);
2935 }
2936
2937 #define IXGBE_MAX_RX_DESC_POLL 10
2938 static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
2939 struct ixgbe_ring *ring)
2940 {
2941 struct ixgbe_hw *hw = &adapter->hw;
2942 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
2943 u32 rxdctl;
2944 u8 reg_idx = ring->reg_idx;
2945
2946 /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2947 if (hw->mac.type == ixgbe_mac_82598EB &&
2948 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2949 return;
2950
2951 do {
2952 usleep_range(1000, 2000);
2953 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2954 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
2955
2956 if (!wait_loop) {
2957 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
2958 "the polling period\n", reg_idx);
2959 }
2960 }
2961
2962 void ixgbe_disable_rx_queue(struct ixgbe_adapter *adapter,
2963 struct ixgbe_ring *ring)
2964 {
2965 struct ixgbe_hw *hw = &adapter->hw;
2966 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
2967 u32 rxdctl;
2968 u8 reg_idx = ring->reg_idx;
2969
2970 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2971 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
2972
2973 /* write value back with RXDCTL.ENABLE bit cleared */
2974 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
2975
2976 if (hw->mac.type == ixgbe_mac_82598EB &&
2977 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2978 return;
2979
2980 /* the hardware may take up to 100us to really disable the rx queue */
2981 do {
2982 udelay(10);
2983 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2984 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
2985
2986 if (!wait_loop) {
2987 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not cleared within "
2988 "the polling period\n", reg_idx);
2989 }
2990 }
2991
2992 void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
2993 struct ixgbe_ring *ring)
2994 {
2995 struct ixgbe_hw *hw = &adapter->hw;
2996 u64 rdba = ring->dma;
2997 u32 rxdctl;
2998 u8 reg_idx = ring->reg_idx;
2999
3000 /* disable queue to avoid issues while updating state */
3001 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3002 ixgbe_disable_rx_queue(adapter, ring);
3003
3004 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
3005 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
3006 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
3007 ring->count * sizeof(union ixgbe_adv_rx_desc));
3008 IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
3009 IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
3010 ring->tail = hw->hw_addr + IXGBE_RDT(reg_idx);
3011
3012 ixgbe_configure_srrctl(adapter, ring);
3013 ixgbe_configure_rscctl(adapter, ring);
3014
3015 /* If operating in IOV mode set RLPML for X540 */
3016 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) &&
3017 hw->mac.type == ixgbe_mac_X540) {
3018 rxdctl &= ~IXGBE_RXDCTL_RLPMLMASK;
3019 rxdctl |= ((ring->netdev->mtu + ETH_HLEN +
3020 ETH_FCS_LEN + VLAN_HLEN) | IXGBE_RXDCTL_RLPML_EN);
3021 }
3022
3023 if (hw->mac.type == ixgbe_mac_82598EB) {
3024 /*
3025 * enable cache line friendly hardware writes:
3026 * PTHRESH=32 descriptors (half the internal cache),
3027 * this also removes ugly rx_no_buffer_count increment
3028 * HTHRESH=4 descriptors (to minimize latency on fetch)
3029 * WTHRESH=8 burst writeback up to two cache lines
3030 */
3031 rxdctl &= ~0x3FFFFF;
3032 rxdctl |= 0x080420;
3033 }
3034
3035 /* enable receive descriptor ring */
3036 rxdctl |= IXGBE_RXDCTL_ENABLE;
3037 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3038
3039 ixgbe_rx_desc_queue_enable(adapter, ring);
3040 ixgbe_alloc_rx_buffers(ring, ixgbe_desc_unused(ring));
3041 }
3042
3043 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
3044 {
3045 struct ixgbe_hw *hw = &adapter->hw;
3046 int p;
3047
3048 /* PSRTYPE must be initialized in non 82598 adapters */
3049 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
3050 IXGBE_PSRTYPE_UDPHDR |
3051 IXGBE_PSRTYPE_IPV4HDR |
3052 IXGBE_PSRTYPE_L2HDR |
3053 IXGBE_PSRTYPE_IPV6HDR;
3054
3055 if (hw->mac.type == ixgbe_mac_82598EB)
3056 return;
3057
3058 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED)
3059 psrtype |= (adapter->num_rx_queues_per_pool << 29);
3060
3061 for (p = 0; p < adapter->num_rx_pools; p++)
3062 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(adapter->num_vfs + p),
3063 psrtype);
3064 }
3065
3066 static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
3067 {
3068 struct ixgbe_hw *hw = &adapter->hw;
3069 u32 gcr_ext;
3070 u32 vt_reg_bits;
3071 u32 reg_offset, vf_shift;
3072 u32 vmdctl;
3073
3074 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
3075 return;
3076
3077 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
3078 vt_reg_bits = IXGBE_VMD_CTL_VMDQ_EN | IXGBE_VT_CTL_REPLEN;
3079 vt_reg_bits |= (adapter->num_vfs << IXGBE_VT_CTL_POOL_SHIFT);
3080 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl | vt_reg_bits);
3081
3082 vf_shift = adapter->num_vfs % 32;
3083 reg_offset = (adapter->num_vfs > 32) ? 1 : 0;
3084
3085 /* Enable only the PF's pool for Tx/Rx */
3086 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (1 << vf_shift));
3087 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), 0);
3088 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (1 << vf_shift));
3089 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), 0);
3090 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
3091
3092 /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
3093 hw->mac.ops.set_vmdq(hw, 0, adapter->num_vfs);
3094
3095 /*
3096 * Set up VF register offsets for selected VT Mode,
3097 * i.e. 32 or 64 VFs for SR-IOV
3098 */
3099 gcr_ext = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
3100 gcr_ext |= IXGBE_GCR_EXT_MSIX_EN;
3101 gcr_ext |= IXGBE_GCR_EXT_VT_MODE_64;
3102 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
3103
3104 /* enable Tx loopback for VF/PF communication */
3105 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
3106 /* Enable MAC Anti-Spoofing */
3107 hw->mac.ops.set_mac_anti_spoofing(hw,
3108 (adapter->antispoofing_enabled =
3109 (adapter->num_vfs != 0)),
3110 adapter->num_vfs);
3111 }
3112
3113 static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
3114 {
3115 struct ixgbe_hw *hw = &adapter->hw;
3116 struct net_device *netdev = adapter->netdev;
3117 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3118 int rx_buf_len;
3119 struct ixgbe_ring *rx_ring;
3120 int i;
3121 u32 mhadd, hlreg0;
3122
3123 /* Decide whether to use packet split mode or not */
3124 /* On by default */
3125 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
3126
3127 /* Do not use packet split if we're in SR-IOV Mode */
3128 if (adapter->num_vfs)
3129 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
3130
3131 /* Disable packet split due to 82599 erratum #45 */
3132 if (hw->mac.type == ixgbe_mac_82599EB)
3133 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
3134
3135 /* Set the RX buffer length according to the mode */
3136 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
3137 rx_buf_len = IXGBE_RX_HDR_SIZE;
3138 } else {
3139 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
3140 (netdev->mtu <= ETH_DATA_LEN))
3141 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3142 else
3143 rx_buf_len = ALIGN(max_frame + VLAN_HLEN, 1024);
3144 }
3145
3146 #ifdef IXGBE_FCOE
3147 /* adjust max frame to be able to do baby jumbo for FCoE */
3148 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
3149 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
3150 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
3151
3152 #endif /* IXGBE_FCOE */
3153 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
3154 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
3155 mhadd &= ~IXGBE_MHADD_MFS_MASK;
3156 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
3157
3158 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
3159 }
3160
3161 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
3162 /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
3163 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
3164 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
3165
3166 /*
3167 * Setup the HW Rx Head and Tail Descriptor Pointers and
3168 * the Base and Length of the Rx Descriptor Ring
3169 */
3170 for (i = 0; i < adapter->num_rx_queues; i++) {
3171 rx_ring = adapter->rx_ring[i];
3172 rx_ring->rx_buf_len = rx_buf_len;
3173
3174 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
3175 set_ring_ps_enabled(rx_ring);
3176 else
3177 clear_ring_ps_enabled(rx_ring);
3178
3179 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
3180 set_ring_rsc_enabled(rx_ring);
3181 else
3182 clear_ring_rsc_enabled(rx_ring);
3183
3184 #ifdef IXGBE_FCOE
3185 if (netdev->features & NETIF_F_FCOE_MTU) {
3186 struct ixgbe_ring_feature *f;
3187 f = &adapter->ring_feature[RING_F_FCOE];
3188 if ((i >= f->mask) && (i < f->mask + f->indices)) {
3189 clear_ring_ps_enabled(rx_ring);
3190 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
3191 rx_ring->rx_buf_len =
3192 IXGBE_FCOE_JUMBO_FRAME_SIZE;
3193 } else if (!ring_is_rsc_enabled(rx_ring) &&
3194 !ring_is_ps_enabled(rx_ring)) {
3195 rx_ring->rx_buf_len =
3196 IXGBE_FCOE_JUMBO_FRAME_SIZE;
3197 }
3198 }
3199 #endif /* IXGBE_FCOE */
3200 }
3201 }
3202
3203 static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
3204 {
3205 struct ixgbe_hw *hw = &adapter->hw;
3206 u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
3207
3208 switch (hw->mac.type) {
3209 case ixgbe_mac_82598EB:
3210 /*
3211 * For VMDq support of different descriptor types or
3212 * buffer sizes through the use of multiple SRRCTL
3213 * registers, RDRXCTL.MVMEN must be set to 1
3214 *
3215 * also, the manual doesn't mention it clearly but DCA hints
3216 * will only use queue 0's tags unless this bit is set. Side
3217 * effects of setting this bit are only that SRRCTL must be
3218 * fully programmed [0..15]
3219 */
3220 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
3221 break;
3222 case ixgbe_mac_82599EB:
3223 case ixgbe_mac_X540:
3224 /* Disable RSC for ACK packets */
3225 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
3226 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
3227 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
3228 /* hardware requires some bits to be set by default */
3229 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
3230 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
3231 break;
3232 default:
3233 /* We should do nothing since we don't know this hardware */
3234 return;
3235 }
3236
3237 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
3238 }
3239
3240 /**
3241 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
3242 * @adapter: board private structure
3243 *
3244 * Configure the Rx unit of the MAC after a reset.
3245 **/
3246 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
3247 {
3248 struct ixgbe_hw *hw = &adapter->hw;
3249 int i;
3250 u32 rxctrl;
3251
3252 /* disable receives while setting up the descriptors */
3253 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3254 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3255
3256 ixgbe_setup_psrtype(adapter);
3257 ixgbe_setup_rdrxctl(adapter);
3258
3259 /* Program registers for the distribution of queues */
3260 ixgbe_setup_mrqc(adapter);
3261
3262 ixgbe_set_uta(adapter);
3263
3264 /* set_rx_buffer_len must be called before ring initialization */
3265 ixgbe_set_rx_buffer_len(adapter);
3266
3267 /*
3268 * Setup the HW Rx Head and Tail Descriptor Pointers and
3269 * the Base and Length of the Rx Descriptor Ring
3270 */
3271 for (i = 0; i < adapter->num_rx_queues; i++)
3272 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
3273
3274 /* disable drop enable for 82598 parts */
3275 if (hw->mac.type == ixgbe_mac_82598EB)
3276 rxctrl |= IXGBE_RXCTRL_DMBYPS;
3277
3278 /* enable all receives */
3279 rxctrl |= IXGBE_RXCTRL_RXEN;
3280 hw->mac.ops.enable_rx_dma(hw, rxctrl);
3281 }
3282
3283 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
3284 {
3285 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3286 struct ixgbe_hw *hw = &adapter->hw;
3287 int pool_ndx = adapter->num_vfs;
3288
3289 /* add VID to filter table */
3290 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, true);
3291 set_bit(vid, adapter->active_vlans);
3292 }
3293
3294 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
3295 {
3296 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3297 struct ixgbe_hw *hw = &adapter->hw;
3298 int pool_ndx = adapter->num_vfs;
3299
3300 /* remove VID from filter table */
3301 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, false);
3302 clear_bit(vid, adapter->active_vlans);
3303 }
3304
3305 /**
3306 * ixgbe_vlan_filter_disable - helper to disable hw vlan filtering
3307 * @adapter: driver data
3308 */
3309 static void ixgbe_vlan_filter_disable(struct ixgbe_adapter *adapter)
3310 {
3311 struct ixgbe_hw *hw = &adapter->hw;
3312 u32 vlnctrl;
3313
3314 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3315 vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
3316 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3317 }
3318
3319 /**
3320 * ixgbe_vlan_filter_enable - helper to enable hw vlan filtering
3321 * @adapter: driver data
3322 */
3323 static void ixgbe_vlan_filter_enable(struct ixgbe_adapter *adapter)
3324 {
3325 struct ixgbe_hw *hw = &adapter->hw;
3326 u32 vlnctrl;
3327
3328 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3329 vlnctrl |= IXGBE_VLNCTRL_VFE;
3330 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
3331 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3332 }
3333
3334 /**
3335 * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping
3336 * @adapter: driver data
3337 */
3338 static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
3339 {
3340 struct ixgbe_hw *hw = &adapter->hw;
3341 u32 vlnctrl;
3342 int i, j;
3343
3344 switch (hw->mac.type) {
3345 case ixgbe_mac_82598EB:
3346 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3347 vlnctrl &= ~IXGBE_VLNCTRL_VME;
3348 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3349 break;
3350 case ixgbe_mac_82599EB:
3351 case ixgbe_mac_X540:
3352 for (i = 0; i < adapter->num_rx_queues; i++) {
3353 j = adapter->rx_ring[i]->reg_idx;
3354 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3355 vlnctrl &= ~IXGBE_RXDCTL_VME;
3356 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3357 }
3358 break;
3359 default:
3360 break;
3361 }
3362 }
3363
3364 /**
3365 * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping
3366 * @adapter: driver data
3367 */
3368 static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
3369 {
3370 struct ixgbe_hw *hw = &adapter->hw;
3371 u32 vlnctrl;
3372 int i, j;
3373
3374 switch (hw->mac.type) {
3375 case ixgbe_mac_82598EB:
3376 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3377 vlnctrl |= IXGBE_VLNCTRL_VME;
3378 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3379 break;
3380 case ixgbe_mac_82599EB:
3381 case ixgbe_mac_X540:
3382 for (i = 0; i < adapter->num_rx_queues; i++) {
3383 j = adapter->rx_ring[i]->reg_idx;
3384 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3385 vlnctrl |= IXGBE_RXDCTL_VME;
3386 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3387 }
3388 break;
3389 default:
3390 break;
3391 }
3392 }
3393
3394 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
3395 {
3396 u16 vid;
3397
3398 ixgbe_vlan_rx_add_vid(adapter->netdev, 0);
3399
3400 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
3401 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
3402 }
3403
3404 /**
3405 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
3406 * @netdev: network interface device structure
3407 *
3408 * Writes unicast address list to the RAR table.
3409 * Returns: -ENOMEM on failure/insufficient address space
3410 * 0 on no addresses written
3411 * X on writing X addresses to the RAR table
3412 **/
3413 static int ixgbe_write_uc_addr_list(struct net_device *netdev)
3414 {
3415 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3416 struct ixgbe_hw *hw = &adapter->hw;
3417 unsigned int vfn = adapter->num_vfs;
3418 unsigned int rar_entries = IXGBE_MAX_PF_MACVLANS;
3419 int count = 0;
3420
3421 /* return ENOMEM indicating insufficient memory for addresses */
3422 if (netdev_uc_count(netdev) > rar_entries)
3423 return -ENOMEM;
3424
3425 if (!netdev_uc_empty(netdev) && rar_entries) {
3426 struct netdev_hw_addr *ha;
3427 /* return error if we do not support writing to RAR table */
3428 if (!hw->mac.ops.set_rar)
3429 return -ENOMEM;
3430
3431 netdev_for_each_uc_addr(ha, netdev) {
3432 if (!rar_entries)
3433 break;
3434 hw->mac.ops.set_rar(hw, rar_entries--, ha->addr,
3435 vfn, IXGBE_RAH_AV);
3436 count++;
3437 }
3438 }
3439 /* write the addresses in reverse order to avoid write combining */
3440 for (; rar_entries > 0 ; rar_entries--)
3441 hw->mac.ops.clear_rar(hw, rar_entries);
3442
3443 return count;
3444 }
3445
3446 /**
3447 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
3448 * @netdev: network interface device structure
3449 *
3450 * The set_rx_method entry point is called whenever the unicast/multicast
3451 * address list or the network interface flags are updated. This routine is
3452 * responsible for configuring the hardware for proper unicast, multicast and
3453 * promiscuous mode.
3454 **/
3455 void ixgbe_set_rx_mode(struct net_device *netdev)
3456 {
3457 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3458 struct ixgbe_hw *hw = &adapter->hw;
3459 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
3460 int count;
3461
3462 /* Check for Promiscuous and All Multicast modes */
3463
3464 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3465
3466 /* set all bits that we expect to always be set */
3467 fctrl |= IXGBE_FCTRL_BAM;
3468 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
3469 fctrl |= IXGBE_FCTRL_PMCF;
3470
3471 /* clear the bits we are changing the status of */
3472 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3473
3474 if (netdev->flags & IFF_PROMISC) {
3475 hw->addr_ctrl.user_set_promisc = true;
3476 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3477 vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_MPE);
3478 /* don't hardware filter vlans in promisc mode */
3479 ixgbe_vlan_filter_disable(adapter);
3480 } else {
3481 if (netdev->flags & IFF_ALLMULTI) {
3482 fctrl |= IXGBE_FCTRL_MPE;
3483 vmolr |= IXGBE_VMOLR_MPE;
3484 } else {
3485 /*
3486 * Write addresses to the MTA, if the attempt fails
3487 * then we should just turn on promiscuous mode so
3488 * that we can at least receive multicast traffic
3489 */
3490 hw->mac.ops.update_mc_addr_list(hw, netdev);
3491 vmolr |= IXGBE_VMOLR_ROMPE;
3492 }
3493 ixgbe_vlan_filter_enable(adapter);
3494 hw->addr_ctrl.user_set_promisc = false;
3495 /*
3496 * Write addresses to available RAR registers, if there is not
3497 * sufficient space to store all the addresses then enable
3498 * unicast promiscuous mode
3499 */
3500 count = ixgbe_write_uc_addr_list(netdev);
3501 if (count < 0) {
3502 fctrl |= IXGBE_FCTRL_UPE;
3503 vmolr |= IXGBE_VMOLR_ROPE;
3504 }
3505 }
3506
3507 if (adapter->num_vfs) {
3508 ixgbe_restore_vf_multicasts(adapter);
3509 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(adapter->num_vfs)) &
3510 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
3511 IXGBE_VMOLR_ROPE);
3512 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(adapter->num_vfs), vmolr);
3513 }
3514
3515 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
3516
3517 if (netdev->features & NETIF_F_HW_VLAN_RX)
3518 ixgbe_vlan_strip_enable(adapter);
3519 else
3520 ixgbe_vlan_strip_disable(adapter);
3521 }
3522
3523 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
3524 {
3525 int q_idx;
3526 struct ixgbe_q_vector *q_vector;
3527 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3528
3529 /* legacy and MSI only use one vector */
3530 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3531 q_vectors = 1;
3532
3533 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3534 struct napi_struct *napi;
3535 q_vector = adapter->q_vector[q_idx];
3536 napi = &q_vector->napi;
3537 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3538 if (!q_vector->rx.count || !q_vector->tx.count) {
3539 if (q_vector->tx.count == 1)
3540 napi->poll = &ixgbe_clean_txonly;
3541 else if (q_vector->rx.count == 1)
3542 napi->poll = &ixgbe_clean_rxonly;
3543 }
3544 }
3545
3546 napi_enable(napi);
3547 }
3548 }
3549
3550 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
3551 {
3552 int q_idx;
3553 struct ixgbe_q_vector *q_vector;
3554 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3555
3556 /* legacy and MSI only use one vector */
3557 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3558 q_vectors = 1;
3559
3560 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3561 q_vector = adapter->q_vector[q_idx];
3562 napi_disable(&q_vector->napi);
3563 }
3564 }
3565
3566 #ifdef CONFIG_IXGBE_DCB
3567 /*
3568 * ixgbe_configure_dcb - Configure DCB hardware
3569 * @adapter: ixgbe adapter struct
3570 *
3571 * This is called by the driver on open to configure the DCB hardware.
3572 * This is also called by the gennetlink interface when reconfiguring
3573 * the DCB state.
3574 */
3575 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
3576 {
3577 struct ixgbe_hw *hw = &adapter->hw;
3578 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3579
3580 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
3581 if (hw->mac.type == ixgbe_mac_82598EB)
3582 netif_set_gso_max_size(adapter->netdev, 65536);
3583 return;
3584 }
3585
3586 if (hw->mac.type == ixgbe_mac_82598EB)
3587 netif_set_gso_max_size(adapter->netdev, 32768);
3588
3589
3590 /* Enable VLAN tag insert/strip */
3591 adapter->netdev->features |= NETIF_F_HW_VLAN_RX;
3592
3593 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
3594
3595 /* reconfigure the hardware */
3596 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE) {
3597 #ifdef CONFIG_FCOE
3598 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
3599 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
3600 #endif
3601 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3602 DCB_TX_CONFIG);
3603 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3604 DCB_RX_CONFIG);
3605 ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
3606 } else {
3607 struct net_device *dev = adapter->netdev;
3608
3609 if (adapter->ixgbe_ieee_ets)
3610 dev->dcbnl_ops->ieee_setets(dev,
3611 adapter->ixgbe_ieee_ets);
3612 if (adapter->ixgbe_ieee_pfc)
3613 dev->dcbnl_ops->ieee_setpfc(dev,
3614 adapter->ixgbe_ieee_pfc);
3615 }
3616
3617 /* Enable RSS Hash per TC */
3618 if (hw->mac.type != ixgbe_mac_82598EB) {
3619 int i;
3620 u32 reg = 0;
3621
3622 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
3623 u8 msb = 0;
3624 u8 cnt = adapter->netdev->tc_to_txq[i].count;
3625
3626 while (cnt >>= 1)
3627 msb++;
3628
3629 reg |= msb << IXGBE_RQTC_SHIFT_TC(i);
3630 }
3631 IXGBE_WRITE_REG(hw, IXGBE_RQTC, reg);
3632 }
3633 }
3634
3635 #endif
3636
3637 static void ixgbe_configure_pb(struct ixgbe_adapter *adapter)
3638 {
3639 int hdrm = 0;
3640 int num_tc = netdev_get_num_tc(adapter->netdev);
3641 struct ixgbe_hw *hw = &adapter->hw;
3642
3643 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3644 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
3645 hdrm = 64 << adapter->fdir_pballoc;
3646
3647 hw->mac.ops.set_rxpba(&adapter->hw, num_tc, hdrm, PBA_STRATEGY_EQUAL);
3648 }
3649
3650 static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
3651 {
3652 struct ixgbe_hw *hw = &adapter->hw;
3653 struct hlist_node *node, *node2;
3654 struct ixgbe_fdir_filter *filter;
3655
3656 spin_lock(&adapter->fdir_perfect_lock);
3657
3658 if (!hlist_empty(&adapter->fdir_filter_list))
3659 ixgbe_fdir_set_input_mask_82599(hw, &adapter->fdir_mask);
3660
3661 hlist_for_each_entry_safe(filter, node, node2,
3662 &adapter->fdir_filter_list, fdir_node) {
3663 ixgbe_fdir_write_perfect_filter_82599(hw,
3664 &filter->filter,
3665 filter->sw_idx,
3666 (filter->action == IXGBE_FDIR_DROP_QUEUE) ?
3667 IXGBE_FDIR_DROP_QUEUE :
3668 adapter->rx_ring[filter->action]->reg_idx);
3669 }
3670
3671 spin_unlock(&adapter->fdir_perfect_lock);
3672 }
3673
3674 static void ixgbe_configure(struct ixgbe_adapter *adapter)
3675 {
3676 struct net_device *netdev = adapter->netdev;
3677 struct ixgbe_hw *hw = &adapter->hw;
3678 int i;
3679
3680 ixgbe_configure_pb(adapter);
3681 #ifdef CONFIG_IXGBE_DCB
3682 ixgbe_configure_dcb(adapter);
3683 #endif
3684
3685 ixgbe_set_rx_mode(netdev);
3686 ixgbe_restore_vlan(adapter);
3687
3688 #ifdef IXGBE_FCOE
3689 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
3690 ixgbe_configure_fcoe(adapter);
3691
3692 #endif /* IXGBE_FCOE */
3693 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3694 for (i = 0; i < adapter->num_tx_queues; i++)
3695 adapter->tx_ring[i]->atr_sample_rate =
3696 adapter->atr_sample_rate;
3697 ixgbe_init_fdir_signature_82599(hw, adapter->fdir_pballoc);
3698 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
3699 ixgbe_init_fdir_perfect_82599(&adapter->hw,
3700 adapter->fdir_pballoc);
3701 ixgbe_fdir_filter_restore(adapter);
3702 }
3703 ixgbe_configure_virtualization(adapter);
3704
3705 ixgbe_configure_tx(adapter);
3706 ixgbe_configure_rx(adapter);
3707 }
3708
3709 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
3710 {
3711 switch (hw->phy.type) {
3712 case ixgbe_phy_sfp_avago:
3713 case ixgbe_phy_sfp_ftl:
3714 case ixgbe_phy_sfp_intel:
3715 case ixgbe_phy_sfp_unknown:
3716 case ixgbe_phy_sfp_passive_tyco:
3717 case ixgbe_phy_sfp_passive_unknown:
3718 case ixgbe_phy_sfp_active_unknown:
3719 case ixgbe_phy_sfp_ftl_active:
3720 return true;
3721 default:
3722 return false;
3723 }
3724 }
3725
3726 /**
3727 * ixgbe_sfp_link_config - set up SFP+ link
3728 * @adapter: pointer to private adapter struct
3729 **/
3730 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
3731 {
3732 /*
3733 * We are assuming the worst case scenerio here, and that
3734 * is that an SFP was inserted/removed after the reset
3735 * but before SFP detection was enabled. As such the best
3736 * solution is to just start searching as soon as we start
3737 */
3738 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
3739 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
3740
3741 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
3742 }
3743
3744 /**
3745 * ixgbe_non_sfp_link_config - set up non-SFP+ link
3746 * @hw: pointer to private hardware struct
3747 *
3748 * Returns 0 on success, negative on failure
3749 **/
3750 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
3751 {
3752 u32 autoneg;
3753 bool negotiation, link_up = false;
3754 u32 ret = IXGBE_ERR_LINK_SETUP;
3755
3756 if (hw->mac.ops.check_link)
3757 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
3758
3759 if (ret)
3760 goto link_cfg_out;
3761
3762 autoneg = hw->phy.autoneg_advertised;
3763 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
3764 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg,
3765 &negotiation);
3766 if (ret)
3767 goto link_cfg_out;
3768
3769 if (hw->mac.ops.setup_link)
3770 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
3771 link_cfg_out:
3772 return ret;
3773 }
3774
3775 static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
3776 {
3777 struct ixgbe_hw *hw = &adapter->hw;
3778 u32 gpie = 0;
3779
3780 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3781 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
3782 IXGBE_GPIE_OCD;
3783 gpie |= IXGBE_GPIE_EIAME;
3784 /*
3785 * use EIAM to auto-mask when MSI-X interrupt is asserted
3786 * this saves a register write for every interrupt
3787 */
3788 switch (hw->mac.type) {
3789 case ixgbe_mac_82598EB:
3790 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3791 break;
3792 case ixgbe_mac_82599EB:
3793 case ixgbe_mac_X540:
3794 default:
3795 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
3796 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
3797 break;
3798 }
3799 } else {
3800 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
3801 * specifically only auto mask tx and rx interrupts */
3802 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3803 }
3804
3805 /* XXX: to interrupt immediately for EICS writes, enable this */
3806 /* gpie |= IXGBE_GPIE_EIMEN; */
3807
3808 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3809 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
3810 gpie |= IXGBE_GPIE_VTMODE_64;
3811 }
3812
3813 /* Enable fan failure interrupt */
3814 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
3815 gpie |= IXGBE_SDP1_GPIEN;
3816
3817 if (hw->mac.type == ixgbe_mac_82599EB) {
3818 gpie |= IXGBE_SDP1_GPIEN;
3819 gpie |= IXGBE_SDP2_GPIEN;
3820 }
3821
3822 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3823 }
3824
3825 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
3826 {
3827 struct ixgbe_hw *hw = &adapter->hw;
3828 int err;
3829 u32 ctrl_ext;
3830
3831 ixgbe_get_hw_control(adapter);
3832 ixgbe_setup_gpie(adapter);
3833
3834 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3835 ixgbe_configure_msix(adapter);
3836 else
3837 ixgbe_configure_msi_and_legacy(adapter);
3838
3839 /* enable the optics for both mult-speed fiber and 82599 SFP+ fiber */
3840 if (hw->mac.ops.enable_tx_laser &&
3841 ((hw->phy.multispeed_fiber) ||
3842 ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
3843 (hw->mac.type == ixgbe_mac_82599EB))))
3844 hw->mac.ops.enable_tx_laser(hw);
3845
3846 clear_bit(__IXGBE_DOWN, &adapter->state);
3847 ixgbe_napi_enable_all(adapter);
3848
3849 if (ixgbe_is_sfp(hw)) {
3850 ixgbe_sfp_link_config(adapter);
3851 } else {
3852 err = ixgbe_non_sfp_link_config(hw);
3853 if (err)
3854 e_err(probe, "link_config FAILED %d\n", err);
3855 }
3856
3857 /* clear any pending interrupts, may auto mask */
3858 IXGBE_READ_REG(hw, IXGBE_EICR);
3859 ixgbe_irq_enable(adapter, true, true);
3860
3861 /*
3862 * If this adapter has a fan, check to see if we had a failure
3863 * before we enabled the interrupt.
3864 */
3865 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
3866 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
3867 if (esdp & IXGBE_ESDP_SDP1)
3868 e_crit(drv, "Fan has stopped, replace the adapter\n");
3869 }
3870
3871 /* enable transmits */
3872 netif_tx_start_all_queues(adapter->netdev);
3873
3874 /* bring the link up in the watchdog, this could race with our first
3875 * link up interrupt but shouldn't be a problem */
3876 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
3877 adapter->link_check_timeout = jiffies;
3878 mod_timer(&adapter->service_timer, jiffies);
3879
3880 /* Set PF Reset Done bit so PF/VF Mail Ops can work */
3881 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
3882 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
3883 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
3884
3885 return 0;
3886 }
3887
3888 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
3889 {
3890 WARN_ON(in_interrupt());
3891 /* put off any impending NetWatchDogTimeout */
3892 adapter->netdev->trans_start = jiffies;
3893
3894 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
3895 usleep_range(1000, 2000);
3896 ixgbe_down(adapter);
3897 /*
3898 * If SR-IOV enabled then wait a bit before bringing the adapter
3899 * back up to give the VFs time to respond to the reset. The
3900 * two second wait is based upon the watchdog timer cycle in
3901 * the VF driver.
3902 */
3903 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3904 msleep(2000);
3905 ixgbe_up(adapter);
3906 clear_bit(__IXGBE_RESETTING, &adapter->state);
3907 }
3908
3909 int ixgbe_up(struct ixgbe_adapter *adapter)
3910 {
3911 /* hardware has been reset, we need to reload some things */
3912 ixgbe_configure(adapter);
3913
3914 return ixgbe_up_complete(adapter);
3915 }
3916
3917 void ixgbe_reset(struct ixgbe_adapter *adapter)
3918 {
3919 struct ixgbe_hw *hw = &adapter->hw;
3920 int err;
3921
3922 /* lock SFP init bit to prevent race conditions with the watchdog */
3923 while (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
3924 usleep_range(1000, 2000);
3925
3926 /* clear all SFP and link config related flags while holding SFP_INIT */
3927 adapter->flags2 &= ~(IXGBE_FLAG2_SEARCH_FOR_SFP |
3928 IXGBE_FLAG2_SFP_NEEDS_RESET);
3929 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
3930
3931 err = hw->mac.ops.init_hw(hw);
3932 switch (err) {
3933 case 0:
3934 case IXGBE_ERR_SFP_NOT_PRESENT:
3935 case IXGBE_ERR_SFP_NOT_SUPPORTED:
3936 break;
3937 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
3938 e_dev_err("master disable timed out\n");
3939 break;
3940 case IXGBE_ERR_EEPROM_VERSION:
3941 /* We are running on a pre-production device, log a warning */
3942 e_dev_warn("This device is a pre-production adapter/LOM. "
3943 "Please be aware there may be issuesassociated with "
3944 "your hardware. If you are experiencing problems "
3945 "please contact your Intel or hardware "
3946 "representative who provided you with this "
3947 "hardware.\n");
3948 break;
3949 default:
3950 e_dev_err("Hardware Error: %d\n", err);
3951 }
3952
3953 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
3954
3955 /* reprogram the RAR[0] in case user changed it. */
3956 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
3957 IXGBE_RAH_AV);
3958 }
3959
3960 /**
3961 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
3962 * @rx_ring: ring to free buffers from
3963 **/
3964 static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring)
3965 {
3966 struct device *dev = rx_ring->dev;
3967 unsigned long size;
3968 u16 i;
3969
3970 /* ring already cleared, nothing to do */
3971 if (!rx_ring->rx_buffer_info)
3972 return;
3973
3974 /* Free all the Rx ring sk_buffs */
3975 for (i = 0; i < rx_ring->count; i++) {
3976 struct ixgbe_rx_buffer *rx_buffer_info;
3977
3978 rx_buffer_info = &rx_ring->rx_buffer_info[i];
3979 if (rx_buffer_info->dma) {
3980 dma_unmap_single(rx_ring->dev, rx_buffer_info->dma,
3981 rx_ring->rx_buf_len,
3982 DMA_FROM_DEVICE);
3983 rx_buffer_info->dma = 0;
3984 }
3985 if (rx_buffer_info->skb) {
3986 struct sk_buff *skb = rx_buffer_info->skb;
3987 rx_buffer_info->skb = NULL;
3988 do {
3989 struct sk_buff *this = skb;
3990 if (IXGBE_RSC_CB(this)->delay_unmap) {
3991 dma_unmap_single(dev,
3992 IXGBE_RSC_CB(this)->dma,
3993 rx_ring->rx_buf_len,
3994 DMA_FROM_DEVICE);
3995 IXGBE_RSC_CB(this)->dma = 0;
3996 IXGBE_RSC_CB(skb)->delay_unmap = false;
3997 }
3998 skb = skb->prev;
3999 dev_kfree_skb(this);
4000 } while (skb);
4001 }
4002 if (!rx_buffer_info->page)
4003 continue;
4004 if (rx_buffer_info->page_dma) {
4005 dma_unmap_page(dev, rx_buffer_info->page_dma,
4006 PAGE_SIZE / 2, DMA_FROM_DEVICE);
4007 rx_buffer_info->page_dma = 0;
4008 }
4009 put_page(rx_buffer_info->page);
4010 rx_buffer_info->page = NULL;
4011 rx_buffer_info->page_offset = 0;
4012 }
4013
4014 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4015 memset(rx_ring->rx_buffer_info, 0, size);
4016
4017 /* Zero out the descriptor ring */
4018 memset(rx_ring->desc, 0, rx_ring->size);
4019
4020 rx_ring->next_to_clean = 0;
4021 rx_ring->next_to_use = 0;
4022 }
4023
4024 /**
4025 * ixgbe_clean_tx_ring - Free Tx Buffers
4026 * @tx_ring: ring to be cleaned
4027 **/
4028 static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
4029 {
4030 struct ixgbe_tx_buffer *tx_buffer_info;
4031 unsigned long size;
4032 u16 i;
4033
4034 /* ring already cleared, nothing to do */
4035 if (!tx_ring->tx_buffer_info)
4036 return;
4037
4038 /* Free all the Tx ring sk_buffs */
4039 for (i = 0; i < tx_ring->count; i++) {
4040 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4041 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
4042 }
4043
4044 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
4045 memset(tx_ring->tx_buffer_info, 0, size);
4046
4047 /* Zero out the descriptor ring */
4048 memset(tx_ring->desc, 0, tx_ring->size);
4049
4050 tx_ring->next_to_use = 0;
4051 tx_ring->next_to_clean = 0;
4052 }
4053
4054 /**
4055 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
4056 * @adapter: board private structure
4057 **/
4058 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
4059 {
4060 int i;
4061
4062 for (i = 0; i < adapter->num_rx_queues; i++)
4063 ixgbe_clean_rx_ring(adapter->rx_ring[i]);
4064 }
4065
4066 /**
4067 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
4068 * @adapter: board private structure
4069 **/
4070 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
4071 {
4072 int i;
4073
4074 for (i = 0; i < adapter->num_tx_queues; i++)
4075 ixgbe_clean_tx_ring(adapter->tx_ring[i]);
4076 }
4077
4078 static void ixgbe_fdir_filter_exit(struct ixgbe_adapter *adapter)
4079 {
4080 struct hlist_node *node, *node2;
4081 struct ixgbe_fdir_filter *filter;
4082
4083 spin_lock(&adapter->fdir_perfect_lock);
4084
4085 hlist_for_each_entry_safe(filter, node, node2,
4086 &adapter->fdir_filter_list, fdir_node) {
4087 hlist_del(&filter->fdir_node);
4088 kfree(filter);
4089 }
4090 adapter->fdir_filter_count = 0;
4091
4092 spin_unlock(&adapter->fdir_perfect_lock);
4093 }
4094
4095 void ixgbe_down(struct ixgbe_adapter *adapter)
4096 {
4097 struct net_device *netdev = adapter->netdev;
4098 struct ixgbe_hw *hw = &adapter->hw;
4099 u32 rxctrl;
4100 int i;
4101 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4102
4103 /* signal that we are down to the interrupt handler */
4104 set_bit(__IXGBE_DOWN, &adapter->state);
4105
4106 /* disable receives */
4107 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
4108 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
4109
4110 /* disable all enabled rx queues */
4111 for (i = 0; i < adapter->num_rx_queues; i++)
4112 /* this call also flushes the previous write */
4113 ixgbe_disable_rx_queue(adapter, adapter->rx_ring[i]);
4114
4115 usleep_range(10000, 20000);
4116
4117 netif_tx_stop_all_queues(netdev);
4118
4119 /* call carrier off first to avoid false dev_watchdog timeouts */
4120 netif_carrier_off(netdev);
4121 netif_tx_disable(netdev);
4122
4123 ixgbe_irq_disable(adapter);
4124
4125 ixgbe_napi_disable_all(adapter);
4126
4127 adapter->flags2 &= ~(IXGBE_FLAG2_FDIR_REQUIRES_REINIT |
4128 IXGBE_FLAG2_RESET_REQUESTED);
4129 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
4130
4131 del_timer_sync(&adapter->service_timer);
4132
4133 /* disable receive for all VFs and wait one second */
4134 if (adapter->num_vfs) {
4135 /* ping all the active vfs to let them know we are going down */
4136 ixgbe_ping_all_vfs(adapter);
4137
4138 /* Disable all VFTE/VFRE TX/RX */
4139 ixgbe_disable_tx_rx(adapter);
4140
4141 /* Mark all the VFs as inactive */
4142 for (i = 0 ; i < adapter->num_vfs; i++)
4143 adapter->vfinfo[i].clear_to_send = 0;
4144 }
4145
4146 /* Cleanup the affinity_hint CPU mask memory and callback */
4147 for (i = 0; i < num_q_vectors; i++) {
4148 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
4149 /* clear the affinity_mask in the IRQ descriptor */
4150 irq_set_affinity_hint(adapter->msix_entries[i]. vector, NULL);
4151 /* release the CPU mask memory */
4152 free_cpumask_var(q_vector->affinity_mask);
4153 }
4154
4155 /* disable transmits in the hardware now that interrupts are off */
4156 for (i = 0; i < adapter->num_tx_queues; i++) {
4157 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
4158 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
4159 }
4160
4161 /* Disable the Tx DMA engine on 82599 and X540 */
4162 switch (hw->mac.type) {
4163 case ixgbe_mac_82599EB:
4164 case ixgbe_mac_X540:
4165 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
4166 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
4167 ~IXGBE_DMATXCTL_TE));
4168 break;
4169 default:
4170 break;
4171 }
4172
4173 if (!pci_channel_offline(adapter->pdev))
4174 ixgbe_reset(adapter);
4175
4176 /* power down the optics for multispeed fiber and 82599 SFP+ fiber */
4177 if (hw->mac.ops.disable_tx_laser &&
4178 ((hw->phy.multispeed_fiber) ||
4179 ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
4180 (hw->mac.type == ixgbe_mac_82599EB))))
4181 hw->mac.ops.disable_tx_laser(hw);
4182
4183 ixgbe_clean_all_tx_rings(adapter);
4184 ixgbe_clean_all_rx_rings(adapter);
4185
4186 #ifdef CONFIG_IXGBE_DCA
4187 /* since we reset the hardware DCA settings were cleared */
4188 ixgbe_setup_dca(adapter);
4189 #endif
4190 }
4191
4192 /**
4193 * ixgbe_poll - NAPI Rx polling callback
4194 * @napi: structure for representing this polling device
4195 * @budget: how many packets driver is allowed to clean
4196 *
4197 * This function is used for legacy and MSI, NAPI mode
4198 **/
4199 static int ixgbe_poll(struct napi_struct *napi, int budget)
4200 {
4201 struct ixgbe_q_vector *q_vector =
4202 container_of(napi, struct ixgbe_q_vector, napi);
4203 struct ixgbe_adapter *adapter = q_vector->adapter;
4204 int tx_clean_complete, work_done = 0;
4205
4206 #ifdef CONFIG_IXGBE_DCA
4207 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
4208 ixgbe_update_dca(q_vector);
4209 #endif
4210
4211 tx_clean_complete = ixgbe_clean_tx_irq(q_vector, adapter->tx_ring[0]);
4212 ixgbe_clean_rx_irq(q_vector, adapter->rx_ring[0], &work_done, budget);
4213
4214 if (!tx_clean_complete)
4215 work_done = budget;
4216
4217 /* If budget not fully consumed, exit the polling mode */
4218 if (work_done < budget) {
4219 napi_complete(napi);
4220 if (adapter->rx_itr_setting & 1)
4221 ixgbe_set_itr(q_vector);
4222 if (!test_bit(__IXGBE_DOWN, &adapter->state))
4223 ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
4224 }
4225 return work_done;
4226 }
4227
4228 /**
4229 * ixgbe_tx_timeout - Respond to a Tx Hang
4230 * @netdev: network interface device structure
4231 **/
4232 static void ixgbe_tx_timeout(struct net_device *netdev)
4233 {
4234 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4235
4236 /* Do the reset outside of interrupt context */
4237 ixgbe_tx_timeout_reset(adapter);
4238 }
4239
4240 /**
4241 * ixgbe_set_rss_queues: Allocate queues for RSS
4242 * @adapter: board private structure to initialize
4243 *
4244 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
4245 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
4246 *
4247 **/
4248 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
4249 {
4250 bool ret = false;
4251 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
4252
4253 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4254 f->mask = 0xF;
4255 adapter->num_rx_queues = f->indices;
4256 adapter->num_tx_queues = f->indices;
4257 ret = true;
4258 } else {
4259 ret = false;
4260 }
4261
4262 return ret;
4263 }
4264
4265 /**
4266 * ixgbe_set_fdir_queues: Allocate queues for Flow Director
4267 * @adapter: board private structure to initialize
4268 *
4269 * Flow Director is an advanced Rx filter, attempting to get Rx flows back
4270 * to the original CPU that initiated the Tx session. This runs in addition
4271 * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
4272 * Rx load across CPUs using RSS.
4273 *
4274 **/
4275 static inline bool ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
4276 {
4277 bool ret = false;
4278 struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
4279
4280 f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
4281 f_fdir->mask = 0;
4282
4283 /* Flow Director must have RSS enabled */
4284 if ((adapter->flags & IXGBE_FLAG_RSS_ENABLED) &&
4285 (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)) {
4286 adapter->num_tx_queues = f_fdir->indices;
4287 adapter->num_rx_queues = f_fdir->indices;
4288 ret = true;
4289 } else {
4290 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4291 }
4292 return ret;
4293 }
4294
4295 #ifdef IXGBE_FCOE
4296 /**
4297 * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
4298 * @adapter: board private structure to initialize
4299 *
4300 * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
4301 * The ring feature mask is not used as a mask for FCoE, as it can take any 8
4302 * rx queues out of the max number of rx queues, instead, it is used as the
4303 * index of the first rx queue used by FCoE.
4304 *
4305 **/
4306 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
4307 {
4308 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4309
4310 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
4311 return false;
4312
4313 f->indices = min((int)num_online_cpus(), f->indices);
4314
4315 adapter->num_rx_queues = 1;
4316 adapter->num_tx_queues = 1;
4317
4318 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4319 e_info(probe, "FCoE enabled with RSS\n");
4320 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
4321 ixgbe_set_fdir_queues(adapter);
4322 else
4323 ixgbe_set_rss_queues(adapter);
4324 }
4325
4326 /* adding FCoE rx rings to the end */
4327 f->mask = adapter->num_rx_queues;
4328 adapter->num_rx_queues += f->indices;
4329 adapter->num_tx_queues += f->indices;
4330
4331 return true;
4332 }
4333 #endif /* IXGBE_FCOE */
4334
4335 /* Artificial max queue cap per traffic class in DCB mode */
4336 #define DCB_QUEUE_CAP 8
4337
4338 #ifdef CONFIG_IXGBE_DCB
4339 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
4340 {
4341 int per_tc_q, q, i, offset = 0;
4342 struct net_device *dev = adapter->netdev;
4343 int tcs = netdev_get_num_tc(dev);
4344
4345 if (!tcs)
4346 return false;
4347
4348 /* Map queue offset and counts onto allocated tx queues */
4349 per_tc_q = min(dev->num_tx_queues / tcs, (unsigned int)DCB_QUEUE_CAP);
4350 q = min((int)num_online_cpus(), per_tc_q);
4351
4352 for (i = 0; i < tcs; i++) {
4353 netdev_set_prio_tc_map(dev, i, i);
4354 netdev_set_tc_queue(dev, i, q, offset);
4355 offset += q;
4356 }
4357
4358 adapter->num_tx_queues = q * tcs;
4359 adapter->num_rx_queues = q * tcs;
4360
4361 #ifdef IXGBE_FCOE
4362 /* FCoE enabled queues require special configuration indexed
4363 * by feature specific indices and mask. Here we map FCoE
4364 * indices onto the DCB queue pairs allowing FCoE to own
4365 * configuration later.
4366 */
4367 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
4368 int tc;
4369 struct ixgbe_ring_feature *f =
4370 &adapter->ring_feature[RING_F_FCOE];
4371
4372 tc = netdev_get_prio_tc_map(dev, adapter->fcoe.up);
4373 f->indices = dev->tc_to_txq[tc].count;
4374 f->mask = dev->tc_to_txq[tc].offset;
4375 }
4376 #endif
4377
4378 return true;
4379 }
4380 #endif
4381
4382 /**
4383 * ixgbe_set_sriov_queues: Allocate queues for IOV use
4384 * @adapter: board private structure to initialize
4385 *
4386 * IOV doesn't actually use anything, so just NAK the
4387 * request for now and let the other queue routines
4388 * figure out what to do.
4389 */
4390 static inline bool ixgbe_set_sriov_queues(struct ixgbe_adapter *adapter)
4391 {
4392 return false;
4393 }
4394
4395 /*
4396 * ixgbe_set_num_queues: Allocate queues for device, feature dependent
4397 * @adapter: board private structure to initialize
4398 *
4399 * This is the top level queue allocation routine. The order here is very
4400 * important, starting with the "most" number of features turned on at once,
4401 * and ending with the smallest set of features. This way large combinations
4402 * can be allocated if they're turned on, and smaller combinations are the
4403 * fallthrough conditions.
4404 *
4405 **/
4406 static int ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
4407 {
4408 /* Start with base case */
4409 adapter->num_rx_queues = 1;
4410 adapter->num_tx_queues = 1;
4411 adapter->num_rx_pools = adapter->num_rx_queues;
4412 adapter->num_rx_queues_per_pool = 1;
4413
4414 if (ixgbe_set_sriov_queues(adapter))
4415 goto done;
4416
4417 #ifdef CONFIG_IXGBE_DCB
4418 if (ixgbe_set_dcb_queues(adapter))
4419 goto done;
4420
4421 #endif
4422 #ifdef IXGBE_FCOE
4423 if (ixgbe_set_fcoe_queues(adapter))
4424 goto done;
4425
4426 #endif /* IXGBE_FCOE */
4427 if (ixgbe_set_fdir_queues(adapter))
4428 goto done;
4429
4430 if (ixgbe_set_rss_queues(adapter))
4431 goto done;
4432
4433 /* fallback to base case */
4434 adapter->num_rx_queues = 1;
4435 adapter->num_tx_queues = 1;
4436
4437 done:
4438 /* Notify the stack of the (possibly) reduced queue counts. */
4439 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
4440 return netif_set_real_num_rx_queues(adapter->netdev,
4441 adapter->num_rx_queues);
4442 }
4443
4444 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
4445 int vectors)
4446 {
4447 int err, vector_threshold;
4448
4449 /* We'll want at least 3 (vector_threshold):
4450 * 1) TxQ[0] Cleanup
4451 * 2) RxQ[0] Cleanup
4452 * 3) Other (Link Status Change, etc.)
4453 * 4) TCP Timer (optional)
4454 */
4455 vector_threshold = MIN_MSIX_COUNT;
4456
4457 /* The more we get, the more we will assign to Tx/Rx Cleanup
4458 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
4459 * Right now, we simply care about how many we'll get; we'll
4460 * set them up later while requesting irq's.
4461 */
4462 while (vectors >= vector_threshold) {
4463 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
4464 vectors);
4465 if (!err) /* Success in acquiring all requested vectors. */
4466 break;
4467 else if (err < 0)
4468 vectors = 0; /* Nasty failure, quit now */
4469 else /* err == number of vectors we should try again with */
4470 vectors = err;
4471 }
4472
4473 if (vectors < vector_threshold) {
4474 /* Can't allocate enough MSI-X interrupts? Oh well.
4475 * This just means we'll go with either a single MSI
4476 * vector or fall back to legacy interrupts.
4477 */
4478 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4479 "Unable to allocate MSI-X interrupts\n");
4480 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4481 kfree(adapter->msix_entries);
4482 adapter->msix_entries = NULL;
4483 } else {
4484 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
4485 /*
4486 * Adjust for only the vectors we'll use, which is minimum
4487 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
4488 * vectors we were allocated.
4489 */
4490 adapter->num_msix_vectors = min(vectors,
4491 adapter->max_msix_q_vectors + NON_Q_VECTORS);
4492 }
4493 }
4494
4495 /**
4496 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
4497 * @adapter: board private structure to initialize
4498 *
4499 * Cache the descriptor ring offsets for RSS to the assigned rings.
4500 *
4501 **/
4502 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
4503 {
4504 int i;
4505
4506 if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED))
4507 return false;
4508
4509 for (i = 0; i < adapter->num_rx_queues; i++)
4510 adapter->rx_ring[i]->reg_idx = i;
4511 for (i = 0; i < adapter->num_tx_queues; i++)
4512 adapter->tx_ring[i]->reg_idx = i;
4513
4514 return true;
4515 }
4516
4517 #ifdef CONFIG_IXGBE_DCB
4518
4519 /* ixgbe_get_first_reg_idx - Return first register index associated with ring */
4520 static void ixgbe_get_first_reg_idx(struct ixgbe_adapter *adapter, u8 tc,
4521 unsigned int *tx, unsigned int *rx)
4522 {
4523 struct net_device *dev = adapter->netdev;
4524 struct ixgbe_hw *hw = &adapter->hw;
4525 u8 num_tcs = netdev_get_num_tc(dev);
4526
4527 *tx = 0;
4528 *rx = 0;
4529
4530 switch (hw->mac.type) {
4531 case ixgbe_mac_82598EB:
4532 *tx = tc << 2;
4533 *rx = tc << 3;
4534 break;
4535 case ixgbe_mac_82599EB:
4536 case ixgbe_mac_X540:
4537 if (num_tcs == 8) {
4538 if (tc < 3) {
4539 *tx = tc << 5;
4540 *rx = tc << 4;
4541 } else if (tc < 5) {
4542 *tx = ((tc + 2) << 4);
4543 *rx = tc << 4;
4544 } else if (tc < num_tcs) {
4545 *tx = ((tc + 8) << 3);
4546 *rx = tc << 4;
4547 }
4548 } else if (num_tcs == 4) {
4549 *rx = tc << 5;
4550 switch (tc) {
4551 case 0:
4552 *tx = 0;
4553 break;
4554 case 1:
4555 *tx = 64;
4556 break;
4557 case 2:
4558 *tx = 96;
4559 break;
4560 case 3:
4561 *tx = 112;
4562 break;
4563 default:
4564 break;
4565 }
4566 }
4567 break;
4568 default:
4569 break;
4570 }
4571 }
4572
4573 /**
4574 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
4575 * @adapter: board private structure to initialize
4576 *
4577 * Cache the descriptor ring offsets for DCB to the assigned rings.
4578 *
4579 **/
4580 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
4581 {
4582 struct net_device *dev = adapter->netdev;
4583 int i, j, k;
4584 u8 num_tcs = netdev_get_num_tc(dev);
4585
4586 if (!num_tcs)
4587 return false;
4588
4589 for (i = 0, k = 0; i < num_tcs; i++) {
4590 unsigned int tx_s, rx_s;
4591 u16 count = dev->tc_to_txq[i].count;
4592
4593 ixgbe_get_first_reg_idx(adapter, i, &tx_s, &rx_s);
4594 for (j = 0; j < count; j++, k++) {
4595 adapter->tx_ring[k]->reg_idx = tx_s + j;
4596 adapter->rx_ring[k]->reg_idx = rx_s + j;
4597 adapter->tx_ring[k]->dcb_tc = i;
4598 adapter->rx_ring[k]->dcb_tc = i;
4599 }
4600 }
4601
4602 return true;
4603 }
4604 #endif
4605
4606 /**
4607 * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
4608 * @adapter: board private structure to initialize
4609 *
4610 * Cache the descriptor ring offsets for Flow Director to the assigned rings.
4611 *
4612 **/
4613 static inline bool ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
4614 {
4615 int i;
4616 bool ret = false;
4617
4618 if ((adapter->flags & IXGBE_FLAG_RSS_ENABLED) &&
4619 (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)) {
4620 for (i = 0; i < adapter->num_rx_queues; i++)
4621 adapter->rx_ring[i]->reg_idx = i;
4622 for (i = 0; i < adapter->num_tx_queues; i++)
4623 adapter->tx_ring[i]->reg_idx = i;
4624 ret = true;
4625 }
4626
4627 return ret;
4628 }
4629
4630 #ifdef IXGBE_FCOE
4631 /**
4632 * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
4633 * @adapter: board private structure to initialize
4634 *
4635 * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
4636 *
4637 */
4638 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
4639 {
4640 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4641 int i;
4642 u8 fcoe_rx_i = 0, fcoe_tx_i = 0;
4643
4644 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
4645 return false;
4646
4647 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4648 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
4649 ixgbe_cache_ring_fdir(adapter);
4650 else
4651 ixgbe_cache_ring_rss(adapter);
4652
4653 fcoe_rx_i = f->mask;
4654 fcoe_tx_i = f->mask;
4655 }
4656 for (i = 0; i < f->indices; i++, fcoe_rx_i++, fcoe_tx_i++) {
4657 adapter->rx_ring[f->mask + i]->reg_idx = fcoe_rx_i;
4658 adapter->tx_ring[f->mask + i]->reg_idx = fcoe_tx_i;
4659 }
4660 return true;
4661 }
4662
4663 #endif /* IXGBE_FCOE */
4664 /**
4665 * ixgbe_cache_ring_sriov - Descriptor ring to register mapping for sriov
4666 * @adapter: board private structure to initialize
4667 *
4668 * SR-IOV doesn't use any descriptor rings but changes the default if
4669 * no other mapping is used.
4670 *
4671 */
4672 static inline bool ixgbe_cache_ring_sriov(struct ixgbe_adapter *adapter)
4673 {
4674 adapter->rx_ring[0]->reg_idx = adapter->num_vfs * 2;
4675 adapter->tx_ring[0]->reg_idx = adapter->num_vfs * 2;
4676 if (adapter->num_vfs)
4677 return true;
4678 else
4679 return false;
4680 }
4681
4682 /**
4683 * ixgbe_cache_ring_register - Descriptor ring to register mapping
4684 * @adapter: board private structure to initialize
4685 *
4686 * Once we know the feature-set enabled for the device, we'll cache
4687 * the register offset the descriptor ring is assigned to.
4688 *
4689 * Note, the order the various feature calls is important. It must start with
4690 * the "most" features enabled at the same time, then trickle down to the
4691 * least amount of features turned on at once.
4692 **/
4693 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
4694 {
4695 /* start with default case */
4696 adapter->rx_ring[0]->reg_idx = 0;
4697 adapter->tx_ring[0]->reg_idx = 0;
4698
4699 if (ixgbe_cache_ring_sriov(adapter))
4700 return;
4701
4702 #ifdef CONFIG_IXGBE_DCB
4703 if (ixgbe_cache_ring_dcb(adapter))
4704 return;
4705 #endif
4706
4707 #ifdef IXGBE_FCOE
4708 if (ixgbe_cache_ring_fcoe(adapter))
4709 return;
4710 #endif /* IXGBE_FCOE */
4711
4712 if (ixgbe_cache_ring_fdir(adapter))
4713 return;
4714
4715 if (ixgbe_cache_ring_rss(adapter))
4716 return;
4717 }
4718
4719 /**
4720 * ixgbe_alloc_queues - Allocate memory for all rings
4721 * @adapter: board private structure to initialize
4722 *
4723 * We allocate one ring per queue at run-time since we don't know the
4724 * number of queues at compile-time. The polling_netdev array is
4725 * intended for Multiqueue, but should work fine with a single queue.
4726 **/
4727 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
4728 {
4729 int rx = 0, tx = 0, nid = adapter->node;
4730
4731 if (nid < 0 || !node_online(nid))
4732 nid = first_online_node;
4733
4734 for (; tx < adapter->num_tx_queues; tx++) {
4735 struct ixgbe_ring *ring;
4736
4737 ring = kzalloc_node(sizeof(*ring), GFP_KERNEL, nid);
4738 if (!ring)
4739 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
4740 if (!ring)
4741 goto err_allocation;
4742 ring->count = adapter->tx_ring_count;
4743 ring->queue_index = tx;
4744 ring->numa_node = nid;
4745 ring->dev = &adapter->pdev->dev;
4746 ring->netdev = adapter->netdev;
4747
4748 adapter->tx_ring[tx] = ring;
4749 }
4750
4751 for (; rx < adapter->num_rx_queues; rx++) {
4752 struct ixgbe_ring *ring;
4753
4754 ring = kzalloc_node(sizeof(*ring), GFP_KERNEL, nid);
4755 if (!ring)
4756 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
4757 if (!ring)
4758 goto err_allocation;
4759 ring->count = adapter->rx_ring_count;
4760 ring->queue_index = rx;
4761 ring->numa_node = nid;
4762 ring->dev = &adapter->pdev->dev;
4763 ring->netdev = adapter->netdev;
4764
4765 adapter->rx_ring[rx] = ring;
4766 }
4767
4768 ixgbe_cache_ring_register(adapter);
4769
4770 return 0;
4771
4772 err_allocation:
4773 while (tx)
4774 kfree(adapter->tx_ring[--tx]);
4775
4776 while (rx)
4777 kfree(adapter->rx_ring[--rx]);
4778 return -ENOMEM;
4779 }
4780
4781 /**
4782 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
4783 * @adapter: board private structure to initialize
4784 *
4785 * Attempt to configure the interrupts using the best available
4786 * capabilities of the hardware and the kernel.
4787 **/
4788 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
4789 {
4790 struct ixgbe_hw *hw = &adapter->hw;
4791 int err = 0;
4792 int vector, v_budget;
4793
4794 /*
4795 * It's easy to be greedy for MSI-X vectors, but it really
4796 * doesn't do us much good if we have a lot more vectors
4797 * than CPU's. So let's be conservative and only ask for
4798 * (roughly) the same number of vectors as there are CPU's.
4799 */
4800 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
4801 (int)num_online_cpus()) + NON_Q_VECTORS;
4802
4803 /*
4804 * At the same time, hardware can only support a maximum of
4805 * hw.mac->max_msix_vectors vectors. With features
4806 * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
4807 * descriptor queues supported by our device. Thus, we cap it off in
4808 * those rare cases where the cpu count also exceeds our vector limit.
4809 */
4810 v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
4811
4812 /* A failure in MSI-X entry allocation isn't fatal, but it does
4813 * mean we disable MSI-X capabilities of the adapter. */
4814 adapter->msix_entries = kcalloc(v_budget,
4815 sizeof(struct msix_entry), GFP_KERNEL);
4816 if (adapter->msix_entries) {
4817 for (vector = 0; vector < v_budget; vector++)
4818 adapter->msix_entries[vector].entry = vector;
4819
4820 ixgbe_acquire_msix_vectors(adapter, v_budget);
4821
4822 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4823 goto out;
4824 }
4825
4826 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
4827 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
4828 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
4829 e_err(probe,
4830 "ATR is not supported while multiple "
4831 "queues are disabled. Disabling Flow Director\n");
4832 }
4833 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4834 adapter->atr_sample_rate = 0;
4835 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4836 ixgbe_disable_sriov(adapter);
4837
4838 err = ixgbe_set_num_queues(adapter);
4839 if (err)
4840 return err;
4841
4842 err = pci_enable_msi(adapter->pdev);
4843 if (!err) {
4844 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
4845 } else {
4846 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4847 "Unable to allocate MSI interrupt, "
4848 "falling back to legacy. Error: %d\n", err);
4849 /* reset err */
4850 err = 0;
4851 }
4852
4853 out:
4854 return err;
4855 }
4856
4857 /**
4858 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
4859 * @adapter: board private structure to initialize
4860 *
4861 * We allocate one q_vector per queue interrupt. If allocation fails we
4862 * return -ENOMEM.
4863 **/
4864 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
4865 {
4866 int q_idx, num_q_vectors;
4867 struct ixgbe_q_vector *q_vector;
4868 int (*poll)(struct napi_struct *, int);
4869
4870 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4871 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4872 poll = &ixgbe_clean_rxtx_many;
4873 } else {
4874 num_q_vectors = 1;
4875 poll = &ixgbe_poll;
4876 }
4877
4878 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4879 q_vector = kzalloc_node(sizeof(struct ixgbe_q_vector),
4880 GFP_KERNEL, adapter->node);
4881 if (!q_vector)
4882 q_vector = kzalloc(sizeof(struct ixgbe_q_vector),
4883 GFP_KERNEL);
4884 if (!q_vector)
4885 goto err_out;
4886 q_vector->adapter = adapter;
4887 if (q_vector->tx.count && !q_vector->rx.count)
4888 q_vector->eitr = adapter->tx_eitr_param;
4889 else
4890 q_vector->eitr = adapter->rx_eitr_param;
4891 q_vector->v_idx = q_idx;
4892 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
4893 adapter->q_vector[q_idx] = q_vector;
4894 }
4895
4896 return 0;
4897
4898 err_out:
4899 while (q_idx) {
4900 q_idx--;
4901 q_vector = adapter->q_vector[q_idx];
4902 netif_napi_del(&q_vector->napi);
4903 kfree(q_vector);
4904 adapter->q_vector[q_idx] = NULL;
4905 }
4906 return -ENOMEM;
4907 }
4908
4909 /**
4910 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
4911 * @adapter: board private structure to initialize
4912 *
4913 * This function frees the memory allocated to the q_vectors. In addition if
4914 * NAPI is enabled it will delete any references to the NAPI struct prior
4915 * to freeing the q_vector.
4916 **/
4917 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
4918 {
4919 int q_idx, num_q_vectors;
4920
4921 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4922 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4923 else
4924 num_q_vectors = 1;
4925
4926 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4927 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
4928 adapter->q_vector[q_idx] = NULL;
4929 netif_napi_del(&q_vector->napi);
4930 kfree(q_vector);
4931 }
4932 }
4933
4934 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
4935 {
4936 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4937 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4938 pci_disable_msix(adapter->pdev);
4939 kfree(adapter->msix_entries);
4940 adapter->msix_entries = NULL;
4941 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
4942 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
4943 pci_disable_msi(adapter->pdev);
4944 }
4945 }
4946
4947 /**
4948 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
4949 * @adapter: board private structure to initialize
4950 *
4951 * We determine which interrupt scheme to use based on...
4952 * - Kernel support (MSI, MSI-X)
4953 * - which can be user-defined (via MODULE_PARAM)
4954 * - Hardware queue count (num_*_queues)
4955 * - defined by miscellaneous hardware support/features (RSS, etc.)
4956 **/
4957 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
4958 {
4959 int err;
4960
4961 /* Number of supported queues */
4962 err = ixgbe_set_num_queues(adapter);
4963 if (err)
4964 return err;
4965
4966 err = ixgbe_set_interrupt_capability(adapter);
4967 if (err) {
4968 e_dev_err("Unable to setup interrupt capabilities\n");
4969 goto err_set_interrupt;
4970 }
4971
4972 err = ixgbe_alloc_q_vectors(adapter);
4973 if (err) {
4974 e_dev_err("Unable to allocate memory for queue vectors\n");
4975 goto err_alloc_q_vectors;
4976 }
4977
4978 err = ixgbe_alloc_queues(adapter);
4979 if (err) {
4980 e_dev_err("Unable to allocate memory for queues\n");
4981 goto err_alloc_queues;
4982 }
4983
4984 e_dev_info("Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u\n",
4985 (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
4986 adapter->num_rx_queues, adapter->num_tx_queues);
4987
4988 set_bit(__IXGBE_DOWN, &adapter->state);
4989
4990 return 0;
4991
4992 err_alloc_queues:
4993 ixgbe_free_q_vectors(adapter);
4994 err_alloc_q_vectors:
4995 ixgbe_reset_interrupt_capability(adapter);
4996 err_set_interrupt:
4997 return err;
4998 }
4999
5000 /**
5001 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
5002 * @adapter: board private structure to clear interrupt scheme on
5003 *
5004 * We go through and clear interrupt specific resources and reset the structure
5005 * to pre-load conditions
5006 **/
5007 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
5008 {
5009 int i;
5010
5011 for (i = 0; i < adapter->num_tx_queues; i++) {
5012 kfree(adapter->tx_ring[i]);
5013 adapter->tx_ring[i] = NULL;
5014 }
5015 for (i = 0; i < adapter->num_rx_queues; i++) {
5016 struct ixgbe_ring *ring = adapter->rx_ring[i];
5017
5018 /* ixgbe_get_stats64() might access this ring, we must wait
5019 * a grace period before freeing it.
5020 */
5021 kfree_rcu(ring, rcu);
5022 adapter->rx_ring[i] = NULL;
5023 }
5024
5025 adapter->num_tx_queues = 0;
5026 adapter->num_rx_queues = 0;
5027
5028 ixgbe_free_q_vectors(adapter);
5029 ixgbe_reset_interrupt_capability(adapter);
5030 }
5031
5032 /**
5033 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
5034 * @adapter: board private structure to initialize
5035 *
5036 * ixgbe_sw_init initializes the Adapter private data structure.
5037 * Fields are initialized based on PCI device information and
5038 * OS network device settings (MTU size).
5039 **/
5040 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
5041 {
5042 struct ixgbe_hw *hw = &adapter->hw;
5043 struct pci_dev *pdev = adapter->pdev;
5044 struct net_device *dev = adapter->netdev;
5045 unsigned int rss;
5046 #ifdef CONFIG_IXGBE_DCB
5047 int j;
5048 struct tc_configuration *tc;
5049 #endif
5050 int max_frame = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
5051
5052 /* PCI config space info */
5053
5054 hw->vendor_id = pdev->vendor;
5055 hw->device_id = pdev->device;
5056 hw->revision_id = pdev->revision;
5057 hw->subsystem_vendor_id = pdev->subsystem_vendor;
5058 hw->subsystem_device_id = pdev->subsystem_device;
5059
5060 /* Set capability flags */
5061 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
5062 adapter->ring_feature[RING_F_RSS].indices = rss;
5063 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
5064 switch (hw->mac.type) {
5065 case ixgbe_mac_82598EB:
5066 if (hw->device_id == IXGBE_DEV_ID_82598AT)
5067 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
5068 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
5069 break;
5070 case ixgbe_mac_82599EB:
5071 case ixgbe_mac_X540:
5072 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
5073 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
5074 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
5075 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
5076 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
5077 /* Flow Director hash filters enabled */
5078 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
5079 adapter->atr_sample_rate = 20;
5080 adapter->ring_feature[RING_F_FDIR].indices =
5081 IXGBE_MAX_FDIR_INDICES;
5082 adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_64K;
5083 #ifdef IXGBE_FCOE
5084 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
5085 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
5086 adapter->ring_feature[RING_F_FCOE].indices = 0;
5087 #ifdef CONFIG_IXGBE_DCB
5088 /* Default traffic class to use for FCoE */
5089 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
5090 #endif
5091 #endif /* IXGBE_FCOE */
5092 break;
5093 default:
5094 break;
5095 }
5096
5097 /* n-tuple support exists, always init our spinlock */
5098 spin_lock_init(&adapter->fdir_perfect_lock);
5099
5100 #ifdef CONFIG_IXGBE_DCB
5101 /* Configure DCB traffic classes */
5102 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
5103 tc = &adapter->dcb_cfg.tc_config[j];
5104 tc->path[DCB_TX_CONFIG].bwg_id = 0;
5105 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
5106 tc->path[DCB_RX_CONFIG].bwg_id = 0;
5107 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
5108 tc->dcb_pfc = pfc_disabled;
5109 }
5110 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
5111 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
5112 adapter->dcb_cfg.pfc_mode_enable = false;
5113 adapter->dcb_set_bitmap = 0x00;
5114 adapter->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE;
5115 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
5116 MAX_TRAFFIC_CLASS);
5117
5118 #endif
5119
5120 /* default flow control settings */
5121 hw->fc.requested_mode = ixgbe_fc_full;
5122 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
5123 #ifdef CONFIG_DCB
5124 adapter->last_lfc_mode = hw->fc.current_mode;
5125 #endif
5126 hw->fc.high_water = FC_HIGH_WATER(max_frame);
5127 hw->fc.low_water = FC_LOW_WATER(max_frame);
5128 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
5129 hw->fc.send_xon = true;
5130 hw->fc.disable_fc_autoneg = false;
5131
5132 /* enable itr by default in dynamic mode */
5133 adapter->rx_itr_setting = 1;
5134 adapter->rx_eitr_param = 20000;
5135 adapter->tx_itr_setting = 1;
5136 adapter->tx_eitr_param = 10000;
5137
5138 /* set defaults for eitr in MegaBytes */
5139 adapter->eitr_low = 10;
5140 adapter->eitr_high = 20;
5141
5142 /* set default ring sizes */
5143 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
5144 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
5145
5146 /* set default work limits */
5147 adapter->tx_work_limit = adapter->tx_ring_count;
5148
5149 /* initialize eeprom parameters */
5150 if (ixgbe_init_eeprom_params_generic(hw)) {
5151 e_dev_err("EEPROM initialization failed\n");
5152 return -EIO;
5153 }
5154
5155 /* enable rx csum by default */
5156 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
5157
5158 /* get assigned NUMA node */
5159 adapter->node = dev_to_node(&pdev->dev);
5160
5161 set_bit(__IXGBE_DOWN, &adapter->state);
5162
5163 return 0;
5164 }
5165
5166 /**
5167 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
5168 * @tx_ring: tx descriptor ring (for a specific queue) to setup
5169 *
5170 * Return 0 on success, negative on failure
5171 **/
5172 int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
5173 {
5174 struct device *dev = tx_ring->dev;
5175 int size;
5176
5177 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
5178 tx_ring->tx_buffer_info = vzalloc_node(size, tx_ring->numa_node);
5179 if (!tx_ring->tx_buffer_info)
5180 tx_ring->tx_buffer_info = vzalloc(size);
5181 if (!tx_ring->tx_buffer_info)
5182 goto err;
5183
5184 /* round up to nearest 4K */
5185 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
5186 tx_ring->size = ALIGN(tx_ring->size, 4096);
5187
5188 tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
5189 &tx_ring->dma, GFP_KERNEL);
5190 if (!tx_ring->desc)
5191 goto err;
5192
5193 tx_ring->next_to_use = 0;
5194 tx_ring->next_to_clean = 0;
5195 return 0;
5196
5197 err:
5198 vfree(tx_ring->tx_buffer_info);
5199 tx_ring->tx_buffer_info = NULL;
5200 dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n");
5201 return -ENOMEM;
5202 }
5203
5204 /**
5205 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
5206 * @adapter: board private structure
5207 *
5208 * If this function returns with an error, then it's possible one or
5209 * more of the rings is populated (while the rest are not). It is the
5210 * callers duty to clean those orphaned rings.
5211 *
5212 * Return 0 on success, negative on failure
5213 **/
5214 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
5215 {
5216 int i, err = 0;
5217
5218 for (i = 0; i < adapter->num_tx_queues; i++) {
5219 err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
5220 if (!err)
5221 continue;
5222 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
5223 break;
5224 }
5225
5226 return err;
5227 }
5228
5229 /**
5230 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
5231 * @rx_ring: rx descriptor ring (for a specific queue) to setup
5232 *
5233 * Returns 0 on success, negative on failure
5234 **/
5235 int ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring)
5236 {
5237 struct device *dev = rx_ring->dev;
5238 int size;
5239
5240 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
5241 rx_ring->rx_buffer_info = vzalloc_node(size, rx_ring->numa_node);
5242 if (!rx_ring->rx_buffer_info)
5243 rx_ring->rx_buffer_info = vzalloc(size);
5244 if (!rx_ring->rx_buffer_info)
5245 goto err;
5246
5247 /* Round up to nearest 4K */
5248 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
5249 rx_ring->size = ALIGN(rx_ring->size, 4096);
5250
5251 rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
5252 &rx_ring->dma, GFP_KERNEL);
5253
5254 if (!rx_ring->desc)
5255 goto err;
5256
5257 rx_ring->next_to_clean = 0;
5258 rx_ring->next_to_use = 0;
5259
5260 return 0;
5261 err:
5262 vfree(rx_ring->rx_buffer_info);
5263 rx_ring->rx_buffer_info = NULL;
5264 dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");
5265 return -ENOMEM;
5266 }
5267
5268 /**
5269 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
5270 * @adapter: board private structure
5271 *
5272 * If this function returns with an error, then it's possible one or
5273 * more of the rings is populated (while the rest are not). It is the
5274 * callers duty to clean those orphaned rings.
5275 *
5276 * Return 0 on success, negative on failure
5277 **/
5278 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
5279 {
5280 int i, err = 0;
5281
5282 for (i = 0; i < adapter->num_rx_queues; i++) {
5283 err = ixgbe_setup_rx_resources(adapter->rx_ring[i]);
5284 if (!err)
5285 continue;
5286 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
5287 break;
5288 }
5289
5290 return err;
5291 }
5292
5293 /**
5294 * ixgbe_free_tx_resources - Free Tx Resources per Queue
5295 * @tx_ring: Tx descriptor ring for a specific queue
5296 *
5297 * Free all transmit software resources
5298 **/
5299 void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring)
5300 {
5301 ixgbe_clean_tx_ring(tx_ring);
5302
5303 vfree(tx_ring->tx_buffer_info);
5304 tx_ring->tx_buffer_info = NULL;
5305
5306 /* if not set, then don't free */
5307 if (!tx_ring->desc)
5308 return;
5309
5310 dma_free_coherent(tx_ring->dev, tx_ring->size,
5311 tx_ring->desc, tx_ring->dma);
5312
5313 tx_ring->desc = NULL;
5314 }
5315
5316 /**
5317 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
5318 * @adapter: board private structure
5319 *
5320 * Free all transmit software resources
5321 **/
5322 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
5323 {
5324 int i;
5325
5326 for (i = 0; i < adapter->num_tx_queues; i++)
5327 if (adapter->tx_ring[i]->desc)
5328 ixgbe_free_tx_resources(adapter->tx_ring[i]);
5329 }
5330
5331 /**
5332 * ixgbe_free_rx_resources - Free Rx Resources
5333 * @rx_ring: ring to clean the resources from
5334 *
5335 * Free all receive software resources
5336 **/
5337 void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring)
5338 {
5339 ixgbe_clean_rx_ring(rx_ring);
5340
5341 vfree(rx_ring->rx_buffer_info);
5342 rx_ring->rx_buffer_info = NULL;
5343
5344 /* if not set, then don't free */
5345 if (!rx_ring->desc)
5346 return;
5347
5348 dma_free_coherent(rx_ring->dev, rx_ring->size,
5349 rx_ring->desc, rx_ring->dma);
5350
5351 rx_ring->desc = NULL;
5352 }
5353
5354 /**
5355 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
5356 * @adapter: board private structure
5357 *
5358 * Free all receive software resources
5359 **/
5360 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
5361 {
5362 int i;
5363
5364 for (i = 0; i < adapter->num_rx_queues; i++)
5365 if (adapter->rx_ring[i]->desc)
5366 ixgbe_free_rx_resources(adapter->rx_ring[i]);
5367 }
5368
5369 /**
5370 * ixgbe_change_mtu - Change the Maximum Transfer Unit
5371 * @netdev: network interface device structure
5372 * @new_mtu: new value for maximum frame size
5373 *
5374 * Returns 0 on success, negative on failure
5375 **/
5376 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
5377 {
5378 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5379 struct ixgbe_hw *hw = &adapter->hw;
5380 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5381
5382 /* MTU < 68 is an error and causes problems on some kernels */
5383 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED &&
5384 hw->mac.type != ixgbe_mac_X540) {
5385 if ((new_mtu < 68) || (max_frame > MAXIMUM_ETHERNET_VLAN_SIZE))
5386 return -EINVAL;
5387 } else {
5388 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
5389 return -EINVAL;
5390 }
5391
5392 e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5393 /* must set new MTU before calling down or up */
5394 netdev->mtu = new_mtu;
5395
5396 hw->fc.high_water = FC_HIGH_WATER(max_frame);
5397 hw->fc.low_water = FC_LOW_WATER(max_frame);
5398
5399 if (netif_running(netdev))
5400 ixgbe_reinit_locked(adapter);
5401
5402 return 0;
5403 }
5404
5405 /**
5406 * ixgbe_open - Called when a network interface is made active
5407 * @netdev: network interface device structure
5408 *
5409 * Returns 0 on success, negative value on failure
5410 *
5411 * The open entry point is called when a network interface is made
5412 * active by the system (IFF_UP). At this point all resources needed
5413 * for transmit and receive operations are allocated, the interrupt
5414 * handler is registered with the OS, the watchdog timer is started,
5415 * and the stack is notified that the interface is ready.
5416 **/
5417 static int ixgbe_open(struct net_device *netdev)
5418 {
5419 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5420 int err;
5421
5422 /* disallow open during test */
5423 if (test_bit(__IXGBE_TESTING, &adapter->state))
5424 return -EBUSY;
5425
5426 netif_carrier_off(netdev);
5427
5428 /* allocate transmit descriptors */
5429 err = ixgbe_setup_all_tx_resources(adapter);
5430 if (err)
5431 goto err_setup_tx;
5432
5433 /* allocate receive descriptors */
5434 err = ixgbe_setup_all_rx_resources(adapter);
5435 if (err)
5436 goto err_setup_rx;
5437
5438 ixgbe_configure(adapter);
5439
5440 err = ixgbe_request_irq(adapter);
5441 if (err)
5442 goto err_req_irq;
5443
5444 err = ixgbe_up_complete(adapter);
5445 if (err)
5446 goto err_up;
5447
5448 netif_tx_start_all_queues(netdev);
5449
5450 return 0;
5451
5452 err_up:
5453 ixgbe_release_hw_control(adapter);
5454 ixgbe_free_irq(adapter);
5455 err_req_irq:
5456 err_setup_rx:
5457 ixgbe_free_all_rx_resources(adapter);
5458 err_setup_tx:
5459 ixgbe_free_all_tx_resources(adapter);
5460 ixgbe_reset(adapter);
5461
5462 return err;
5463 }
5464
5465 /**
5466 * ixgbe_close - Disables a network interface
5467 * @netdev: network interface device structure
5468 *
5469 * Returns 0, this is not allowed to fail
5470 *
5471 * The close entry point is called when an interface is de-activated
5472 * by the OS. The hardware is still under the drivers control, but
5473 * needs to be disabled. A global MAC reset is issued to stop the
5474 * hardware, and all transmit and receive resources are freed.
5475 **/
5476 static int ixgbe_close(struct net_device *netdev)
5477 {
5478 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5479
5480 ixgbe_down(adapter);
5481 ixgbe_free_irq(adapter);
5482
5483 ixgbe_fdir_filter_exit(adapter);
5484
5485 ixgbe_free_all_tx_resources(adapter);
5486 ixgbe_free_all_rx_resources(adapter);
5487
5488 ixgbe_release_hw_control(adapter);
5489
5490 return 0;
5491 }
5492
5493 #ifdef CONFIG_PM
5494 static int ixgbe_resume(struct pci_dev *pdev)
5495 {
5496 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5497 struct net_device *netdev = adapter->netdev;
5498 u32 err;
5499
5500 pci_set_power_state(pdev, PCI_D0);
5501 pci_restore_state(pdev);
5502 /*
5503 * pci_restore_state clears dev->state_saved so call
5504 * pci_save_state to restore it.
5505 */
5506 pci_save_state(pdev);
5507
5508 err = pci_enable_device_mem(pdev);
5509 if (err) {
5510 e_dev_err("Cannot enable PCI device from suspend\n");
5511 return err;
5512 }
5513 pci_set_master(pdev);
5514
5515 pci_wake_from_d3(pdev, false);
5516
5517 err = ixgbe_init_interrupt_scheme(adapter);
5518 if (err) {
5519 e_dev_err("Cannot initialize interrupts for device\n");
5520 return err;
5521 }
5522
5523 ixgbe_reset(adapter);
5524
5525 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5526
5527 if (netif_running(netdev)) {
5528 err = ixgbe_open(netdev);
5529 if (err)
5530 return err;
5531 }
5532
5533 netif_device_attach(netdev);
5534
5535 return 0;
5536 }
5537 #endif /* CONFIG_PM */
5538
5539 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
5540 {
5541 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5542 struct net_device *netdev = adapter->netdev;
5543 struct ixgbe_hw *hw = &adapter->hw;
5544 u32 ctrl, fctrl;
5545 u32 wufc = adapter->wol;
5546 #ifdef CONFIG_PM
5547 int retval = 0;
5548 #endif
5549
5550 netif_device_detach(netdev);
5551
5552 if (netif_running(netdev)) {
5553 ixgbe_down(adapter);
5554 ixgbe_free_irq(adapter);
5555 ixgbe_free_all_tx_resources(adapter);
5556 ixgbe_free_all_rx_resources(adapter);
5557 }
5558
5559 ixgbe_clear_interrupt_scheme(adapter);
5560 #ifdef CONFIG_DCB
5561 kfree(adapter->ixgbe_ieee_pfc);
5562 kfree(adapter->ixgbe_ieee_ets);
5563 #endif
5564
5565 #ifdef CONFIG_PM
5566 retval = pci_save_state(pdev);
5567 if (retval)
5568 return retval;
5569
5570 #endif
5571 if (wufc) {
5572 ixgbe_set_rx_mode(netdev);
5573
5574 /* turn on all-multi mode if wake on multicast is enabled */
5575 if (wufc & IXGBE_WUFC_MC) {
5576 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5577 fctrl |= IXGBE_FCTRL_MPE;
5578 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
5579 }
5580
5581 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
5582 ctrl |= IXGBE_CTRL_GIO_DIS;
5583 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
5584
5585 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
5586 } else {
5587 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
5588 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
5589 }
5590
5591 switch (hw->mac.type) {
5592 case ixgbe_mac_82598EB:
5593 pci_wake_from_d3(pdev, false);
5594 break;
5595 case ixgbe_mac_82599EB:
5596 case ixgbe_mac_X540:
5597 pci_wake_from_d3(pdev, !!wufc);
5598 break;
5599 default:
5600 break;
5601 }
5602
5603 *enable_wake = !!wufc;
5604
5605 ixgbe_release_hw_control(adapter);
5606
5607 pci_disable_device(pdev);
5608
5609 return 0;
5610 }
5611
5612 #ifdef CONFIG_PM
5613 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
5614 {
5615 int retval;
5616 bool wake;
5617
5618 retval = __ixgbe_shutdown(pdev, &wake);
5619 if (retval)
5620 return retval;
5621
5622 if (wake) {
5623 pci_prepare_to_sleep(pdev);
5624 } else {
5625 pci_wake_from_d3(pdev, false);
5626 pci_set_power_state(pdev, PCI_D3hot);
5627 }
5628
5629 return 0;
5630 }
5631 #endif /* CONFIG_PM */
5632
5633 static void ixgbe_shutdown(struct pci_dev *pdev)
5634 {
5635 bool wake;
5636
5637 __ixgbe_shutdown(pdev, &wake);
5638
5639 if (system_state == SYSTEM_POWER_OFF) {
5640 pci_wake_from_d3(pdev, wake);
5641 pci_set_power_state(pdev, PCI_D3hot);
5642 }
5643 }
5644
5645 /**
5646 * ixgbe_update_stats - Update the board statistics counters.
5647 * @adapter: board private structure
5648 **/
5649 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
5650 {
5651 struct net_device *netdev = adapter->netdev;
5652 struct ixgbe_hw *hw = &adapter->hw;
5653 struct ixgbe_hw_stats *hwstats = &adapter->stats;
5654 u64 total_mpc = 0;
5655 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
5656 u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
5657 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
5658 u64 bytes = 0, packets = 0;
5659
5660 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5661 test_bit(__IXGBE_RESETTING, &adapter->state))
5662 return;
5663
5664 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
5665 u64 rsc_count = 0;
5666 u64 rsc_flush = 0;
5667 for (i = 0; i < 16; i++)
5668 adapter->hw_rx_no_dma_resources +=
5669 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5670 for (i = 0; i < adapter->num_rx_queues; i++) {
5671 rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
5672 rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
5673 }
5674 adapter->rsc_total_count = rsc_count;
5675 adapter->rsc_total_flush = rsc_flush;
5676 }
5677
5678 for (i = 0; i < adapter->num_rx_queues; i++) {
5679 struct ixgbe_ring *rx_ring = adapter->rx_ring[i];
5680 non_eop_descs += rx_ring->rx_stats.non_eop_descs;
5681 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
5682 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
5683 bytes += rx_ring->stats.bytes;
5684 packets += rx_ring->stats.packets;
5685 }
5686 adapter->non_eop_descs = non_eop_descs;
5687 adapter->alloc_rx_page_failed = alloc_rx_page_failed;
5688 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
5689 netdev->stats.rx_bytes = bytes;
5690 netdev->stats.rx_packets = packets;
5691
5692 bytes = 0;
5693 packets = 0;
5694 /* gather some stats to the adapter struct that are per queue */
5695 for (i = 0; i < adapter->num_tx_queues; i++) {
5696 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
5697 restart_queue += tx_ring->tx_stats.restart_queue;
5698 tx_busy += tx_ring->tx_stats.tx_busy;
5699 bytes += tx_ring->stats.bytes;
5700 packets += tx_ring->stats.packets;
5701 }
5702 adapter->restart_queue = restart_queue;
5703 adapter->tx_busy = tx_busy;
5704 netdev->stats.tx_bytes = bytes;
5705 netdev->stats.tx_packets = packets;
5706
5707 hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
5708 for (i = 0; i < 8; i++) {
5709 /* for packet buffers not used, the register should read 0 */
5710 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
5711 missed_rx += mpc;
5712 hwstats->mpc[i] += mpc;
5713 total_mpc += hwstats->mpc[i];
5714 if (hw->mac.type == ixgbe_mac_82598EB)
5715 hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
5716 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
5717 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
5718 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
5719 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
5720 switch (hw->mac.type) {
5721 case ixgbe_mac_82598EB:
5722 hwstats->pxonrxc[i] +=
5723 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
5724 break;
5725 case ixgbe_mac_82599EB:
5726 case ixgbe_mac_X540:
5727 hwstats->pxonrxc[i] +=
5728 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
5729 break;
5730 default:
5731 break;
5732 }
5733 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
5734 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
5735 }
5736 hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
5737 /* work around hardware counting issue */
5738 hwstats->gprc -= missed_rx;
5739
5740 ixgbe_update_xoff_received(adapter);
5741
5742 /* 82598 hardware only has a 32 bit counter in the high register */
5743 switch (hw->mac.type) {
5744 case ixgbe_mac_82598EB:
5745 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
5746 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
5747 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
5748 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
5749 break;
5750 case ixgbe_mac_X540:
5751 /* OS2BMC stats are X540 only*/
5752 hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC);
5753 hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC);
5754 hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC);
5755 hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC);
5756 case ixgbe_mac_82599EB:
5757 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
5758 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
5759 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
5760 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
5761 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
5762 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
5763 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
5764 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
5765 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
5766 #ifdef IXGBE_FCOE
5767 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
5768 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
5769 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
5770 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
5771 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
5772 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
5773 #endif /* IXGBE_FCOE */
5774 break;
5775 default:
5776 break;
5777 }
5778 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
5779 hwstats->bprc += bprc;
5780 hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
5781 if (hw->mac.type == ixgbe_mac_82598EB)
5782 hwstats->mprc -= bprc;
5783 hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
5784 hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
5785 hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
5786 hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
5787 hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
5788 hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
5789 hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
5790 hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
5791 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
5792 hwstats->lxontxc += lxon;
5793 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
5794 hwstats->lxofftxc += lxoff;
5795 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5796 hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
5797 hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
5798 /*
5799 * 82598 errata - tx of flow control packets is included in tx counters
5800 */
5801 xon_off_tot = lxon + lxoff;
5802 hwstats->gptc -= xon_off_tot;
5803 hwstats->mptc -= xon_off_tot;
5804 hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
5805 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5806 hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
5807 hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
5808 hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
5809 hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
5810 hwstats->ptc64 -= xon_off_tot;
5811 hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
5812 hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
5813 hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
5814 hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
5815 hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
5816 hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
5817
5818 /* Fill out the OS statistics structure */
5819 netdev->stats.multicast = hwstats->mprc;
5820
5821 /* Rx Errors */
5822 netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
5823 netdev->stats.rx_dropped = 0;
5824 netdev->stats.rx_length_errors = hwstats->rlec;
5825 netdev->stats.rx_crc_errors = hwstats->crcerrs;
5826 netdev->stats.rx_missed_errors = total_mpc;
5827 }
5828
5829 /**
5830 * ixgbe_fdir_reinit_subtask - worker thread to reinit FDIR filter table
5831 * @adapter - pointer to the device adapter structure
5832 **/
5833 static void ixgbe_fdir_reinit_subtask(struct ixgbe_adapter *adapter)
5834 {
5835 struct ixgbe_hw *hw = &adapter->hw;
5836 int i;
5837
5838 if (!(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
5839 return;
5840
5841 adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
5842
5843 /* if interface is down do nothing */
5844 if (test_bit(__IXGBE_DOWN, &adapter->state))
5845 return;
5846
5847 /* do nothing if we are not using signature filters */
5848 if (!(adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE))
5849 return;
5850
5851 adapter->fdir_overflow++;
5852
5853 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
5854 for (i = 0; i < adapter->num_tx_queues; i++)
5855 set_bit(__IXGBE_TX_FDIR_INIT_DONE,
5856 &(adapter->tx_ring[i]->state));
5857 /* re-enable flow director interrupts */
5858 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
5859 } else {
5860 e_err(probe, "failed to finish FDIR re-initialization, "
5861 "ignored adding FDIR ATR filters\n");
5862 }
5863 }
5864
5865 /**
5866 * ixgbe_check_hang_subtask - check for hung queues and dropped interrupts
5867 * @adapter - pointer to the device adapter structure
5868 *
5869 * This function serves two purposes. First it strobes the interrupt lines
5870 * in order to make certain interrupts are occuring. Secondly it sets the
5871 * bits needed to check for TX hangs. As a result we should immediately
5872 * determine if a hang has occured.
5873 */
5874 static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter)
5875 {
5876 struct ixgbe_hw *hw = &adapter->hw;
5877 u64 eics = 0;
5878 int i;
5879
5880 /* If we're down or resetting, just bail */
5881 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5882 test_bit(__IXGBE_RESETTING, &adapter->state))
5883 return;
5884
5885 /* Force detection of hung controller */
5886 if (netif_carrier_ok(adapter->netdev)) {
5887 for (i = 0; i < adapter->num_tx_queues; i++)
5888 set_check_for_tx_hang(adapter->tx_ring[i]);
5889 }
5890
5891 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
5892 /*
5893 * for legacy and MSI interrupts don't set any bits
5894 * that are enabled for EIAM, because this operation
5895 * would set *both* EIMS and EICS for any bit in EIAM
5896 */
5897 IXGBE_WRITE_REG(hw, IXGBE_EICS,
5898 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
5899 } else {
5900 /* get one bit for every active tx/rx interrupt vector */
5901 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
5902 struct ixgbe_q_vector *qv = adapter->q_vector[i];
5903 if (qv->rx.count || qv->tx.count)
5904 eics |= ((u64)1 << i);
5905 }
5906 }
5907
5908 /* Cause software interrupt to ensure rings are cleaned */
5909 ixgbe_irq_rearm_queues(adapter, eics);
5910
5911 }
5912
5913 /**
5914 * ixgbe_watchdog_update_link - update the link status
5915 * @adapter - pointer to the device adapter structure
5916 * @link_speed - pointer to a u32 to store the link_speed
5917 **/
5918 static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter)
5919 {
5920 struct ixgbe_hw *hw = &adapter->hw;
5921 u32 link_speed = adapter->link_speed;
5922 bool link_up = adapter->link_up;
5923 int i;
5924
5925 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
5926 return;
5927
5928 if (hw->mac.ops.check_link) {
5929 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
5930 } else {
5931 /* always assume link is up, if no check link function */
5932 link_speed = IXGBE_LINK_SPEED_10GB_FULL;
5933 link_up = true;
5934 }
5935 if (link_up) {
5936 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5937 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
5938 hw->mac.ops.fc_enable(hw, i);
5939 } else {
5940 hw->mac.ops.fc_enable(hw, 0);
5941 }
5942 }
5943
5944 if (link_up ||
5945 time_after(jiffies, (adapter->link_check_timeout +
5946 IXGBE_TRY_LINK_TIMEOUT))) {
5947 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5948 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
5949 IXGBE_WRITE_FLUSH(hw);
5950 }
5951
5952 adapter->link_up = link_up;
5953 adapter->link_speed = link_speed;
5954 }
5955
5956 /**
5957 * ixgbe_watchdog_link_is_up - update netif_carrier status and
5958 * print link up message
5959 * @adapter - pointer to the device adapter structure
5960 **/
5961 static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
5962 {
5963 struct net_device *netdev = adapter->netdev;
5964 struct ixgbe_hw *hw = &adapter->hw;
5965 u32 link_speed = adapter->link_speed;
5966 bool flow_rx, flow_tx;
5967
5968 /* only continue if link was previously down */
5969 if (netif_carrier_ok(netdev))
5970 return;
5971
5972 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
5973
5974 switch (hw->mac.type) {
5975 case ixgbe_mac_82598EB: {
5976 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5977 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
5978 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
5979 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
5980 }
5981 break;
5982 case ixgbe_mac_X540:
5983 case ixgbe_mac_82599EB: {
5984 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
5985 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
5986 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
5987 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
5988 }
5989 break;
5990 default:
5991 flow_tx = false;
5992 flow_rx = false;
5993 break;
5994 }
5995 e_info(drv, "NIC Link is Up %s, Flow Control: %s\n",
5996 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
5997 "10 Gbps" :
5998 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
5999 "1 Gbps" :
6000 (link_speed == IXGBE_LINK_SPEED_100_FULL ?
6001 "100 Mbps" :
6002 "unknown speed"))),
6003 ((flow_rx && flow_tx) ? "RX/TX" :
6004 (flow_rx ? "RX" :
6005 (flow_tx ? "TX" : "None"))));
6006
6007 netif_carrier_on(netdev);
6008 ixgbe_check_vf_rate_limit(adapter);
6009 }
6010
6011 /**
6012 * ixgbe_watchdog_link_is_down - update netif_carrier status and
6013 * print link down message
6014 * @adapter - pointer to the adapter structure
6015 **/
6016 static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter* adapter)
6017 {
6018 struct net_device *netdev = adapter->netdev;
6019 struct ixgbe_hw *hw = &adapter->hw;
6020
6021 adapter->link_up = false;
6022 adapter->link_speed = 0;
6023
6024 /* only continue if link was up previously */
6025 if (!netif_carrier_ok(netdev))
6026 return;
6027
6028 /* poll for SFP+ cable when link is down */
6029 if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB)
6030 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
6031
6032 e_info(drv, "NIC Link is Down\n");
6033 netif_carrier_off(netdev);
6034 }
6035
6036 /**
6037 * ixgbe_watchdog_flush_tx - flush queues on link down
6038 * @adapter - pointer to the device adapter structure
6039 **/
6040 static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter)
6041 {
6042 int i;
6043 int some_tx_pending = 0;
6044
6045 if (!netif_carrier_ok(adapter->netdev)) {
6046 for (i = 0; i < adapter->num_tx_queues; i++) {
6047 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
6048 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
6049 some_tx_pending = 1;
6050 break;
6051 }
6052 }
6053
6054 if (some_tx_pending) {
6055 /* We've lost link, so the controller stops DMA,
6056 * but we've got queued Tx work that's never going
6057 * to get done, so reset controller to flush Tx.
6058 * (Do the reset outside of interrupt context).
6059 */
6060 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
6061 }
6062 }
6063 }
6064
6065 static void ixgbe_spoof_check(struct ixgbe_adapter *adapter)
6066 {
6067 u32 ssvpc;
6068
6069 /* Do not perform spoof check for 82598 */
6070 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
6071 return;
6072
6073 ssvpc = IXGBE_READ_REG(&adapter->hw, IXGBE_SSVPC);
6074
6075 /*
6076 * ssvpc register is cleared on read, if zero then no
6077 * spoofed packets in the last interval.
6078 */
6079 if (!ssvpc)
6080 return;
6081
6082 e_warn(drv, "%d Spoofed packets detected\n", ssvpc);
6083 }
6084
6085 /**
6086 * ixgbe_watchdog_subtask - check and bring link up
6087 * @adapter - pointer to the device adapter structure
6088 **/
6089 static void ixgbe_watchdog_subtask(struct ixgbe_adapter *adapter)
6090 {
6091 /* if interface is down do nothing */
6092 if (test_bit(__IXGBE_DOWN, &adapter->state))
6093 return;
6094
6095 ixgbe_watchdog_update_link(adapter);
6096
6097 if (adapter->link_up)
6098 ixgbe_watchdog_link_is_up(adapter);
6099 else
6100 ixgbe_watchdog_link_is_down(adapter);
6101
6102 ixgbe_spoof_check(adapter);
6103 ixgbe_update_stats(adapter);
6104
6105 ixgbe_watchdog_flush_tx(adapter);
6106 }
6107
6108 /**
6109 * ixgbe_sfp_detection_subtask - poll for SFP+ cable
6110 * @adapter - the ixgbe adapter structure
6111 **/
6112 static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter)
6113 {
6114 struct ixgbe_hw *hw = &adapter->hw;
6115 s32 err;
6116
6117 /* not searching for SFP so there is nothing to do here */
6118 if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) &&
6119 !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
6120 return;
6121
6122 /* someone else is in init, wait until next service event */
6123 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
6124 return;
6125
6126 err = hw->phy.ops.identify_sfp(hw);
6127 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
6128 goto sfp_out;
6129
6130 if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
6131 /* If no cable is present, then we need to reset
6132 * the next time we find a good cable. */
6133 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
6134 }
6135
6136 /* exit on error */
6137 if (err)
6138 goto sfp_out;
6139
6140 /* exit if reset not needed */
6141 if (!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
6142 goto sfp_out;
6143
6144 adapter->flags2 &= ~IXGBE_FLAG2_SFP_NEEDS_RESET;
6145
6146 /*
6147 * A module may be identified correctly, but the EEPROM may not have
6148 * support for that module. setup_sfp() will fail in that case, so
6149 * we should not allow that module to load.
6150 */
6151 if (hw->mac.type == ixgbe_mac_82598EB)
6152 err = hw->phy.ops.reset(hw);
6153 else
6154 err = hw->mac.ops.setup_sfp(hw);
6155
6156 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
6157 goto sfp_out;
6158
6159 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
6160 e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
6161
6162 sfp_out:
6163 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
6164
6165 if ((err == IXGBE_ERR_SFP_NOT_SUPPORTED) &&
6166 (adapter->netdev->reg_state == NETREG_REGISTERED)) {
6167 e_dev_err("failed to initialize because an unsupported "
6168 "SFP+ module type was detected.\n");
6169 e_dev_err("Reload the driver after installing a "
6170 "supported module.\n");
6171 unregister_netdev(adapter->netdev);
6172 }
6173 }
6174
6175 /**
6176 * ixgbe_sfp_link_config_subtask - set up link SFP after module install
6177 * @adapter - the ixgbe adapter structure
6178 **/
6179 static void ixgbe_sfp_link_config_subtask(struct ixgbe_adapter *adapter)
6180 {
6181 struct ixgbe_hw *hw = &adapter->hw;
6182 u32 autoneg;
6183 bool negotiation;
6184
6185 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_CONFIG))
6186 return;
6187
6188 /* someone else is in init, wait until next service event */
6189 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
6190 return;
6191
6192 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
6193
6194 autoneg = hw->phy.autoneg_advertised;
6195 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
6196 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
6197 hw->mac.autotry_restart = false;
6198 if (hw->mac.ops.setup_link)
6199 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
6200
6201 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
6202 adapter->link_check_timeout = jiffies;
6203 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
6204 }
6205
6206 /**
6207 * ixgbe_service_timer - Timer Call-back
6208 * @data: pointer to adapter cast into an unsigned long
6209 **/
6210 static void ixgbe_service_timer(unsigned long data)
6211 {
6212 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
6213 unsigned long next_event_offset;
6214
6215 /* poll faster when waiting for link */
6216 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
6217 next_event_offset = HZ / 10;
6218 else
6219 next_event_offset = HZ * 2;
6220
6221 /* Reset the timer */
6222 mod_timer(&adapter->service_timer, next_event_offset + jiffies);
6223
6224 ixgbe_service_event_schedule(adapter);
6225 }
6226
6227 static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter)
6228 {
6229 if (!(adapter->flags2 & IXGBE_FLAG2_RESET_REQUESTED))
6230 return;
6231
6232 adapter->flags2 &= ~IXGBE_FLAG2_RESET_REQUESTED;
6233
6234 /* If we're already down or resetting, just bail */
6235 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6236 test_bit(__IXGBE_RESETTING, &adapter->state))
6237 return;
6238
6239 ixgbe_dump(adapter);
6240 netdev_err(adapter->netdev, "Reset adapter\n");
6241 adapter->tx_timeout_count++;
6242
6243 ixgbe_reinit_locked(adapter);
6244 }
6245
6246 /**
6247 * ixgbe_service_task - manages and runs subtasks
6248 * @work: pointer to work_struct containing our data
6249 **/
6250 static void ixgbe_service_task(struct work_struct *work)
6251 {
6252 struct ixgbe_adapter *adapter = container_of(work,
6253 struct ixgbe_adapter,
6254 service_task);
6255
6256 ixgbe_reset_subtask(adapter);
6257 ixgbe_sfp_detection_subtask(adapter);
6258 ixgbe_sfp_link_config_subtask(adapter);
6259 ixgbe_check_overtemp_subtask(adapter);
6260 ixgbe_watchdog_subtask(adapter);
6261 ixgbe_fdir_reinit_subtask(adapter);
6262 ixgbe_check_hang_subtask(adapter);
6263
6264 ixgbe_service_event_complete(adapter);
6265 }
6266
6267 void ixgbe_tx_ctxtdesc(struct ixgbe_ring *tx_ring, u32 vlan_macip_lens,
6268 u32 fcoe_sof_eof, u32 type_tucmd, u32 mss_l4len_idx)
6269 {
6270 struct ixgbe_adv_tx_context_desc *context_desc;
6271 u16 i = tx_ring->next_to_use;
6272
6273 context_desc = IXGBE_TX_CTXTDESC_ADV(tx_ring, i);
6274
6275 i++;
6276 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
6277
6278 /* set bits to identify this as an advanced context descriptor */
6279 type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
6280
6281 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
6282 context_desc->seqnum_seed = cpu_to_le32(fcoe_sof_eof);
6283 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
6284 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
6285 }
6286
6287 static int ixgbe_tso(struct ixgbe_ring *tx_ring, struct sk_buff *skb,
6288 u32 tx_flags, __be16 protocol, u8 *hdr_len)
6289 {
6290 int err;
6291 u32 vlan_macip_lens, type_tucmd;
6292 u32 mss_l4len_idx, l4len;
6293
6294 if (!skb_is_gso(skb))
6295 return 0;
6296
6297 if (skb_header_cloned(skb)) {
6298 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
6299 if (err)
6300 return err;
6301 }
6302
6303 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
6304 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
6305
6306 if (protocol == __constant_htons(ETH_P_IP)) {
6307 struct iphdr *iph = ip_hdr(skb);
6308 iph->tot_len = 0;
6309 iph->check = 0;
6310 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
6311 iph->daddr, 0,
6312 IPPROTO_TCP,
6313 0);
6314 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
6315 } else if (skb_is_gso_v6(skb)) {
6316 ipv6_hdr(skb)->payload_len = 0;
6317 tcp_hdr(skb)->check =
6318 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
6319 &ipv6_hdr(skb)->daddr,
6320 0, IPPROTO_TCP, 0);
6321 }
6322
6323 l4len = tcp_hdrlen(skb);
6324 *hdr_len = skb_transport_offset(skb) + l4len;
6325
6326 /* mss_l4len_id: use 1 as index for TSO */
6327 mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
6328 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
6329 mss_l4len_idx |= 1 << IXGBE_ADVTXD_IDX_SHIFT;
6330
6331 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
6332 vlan_macip_lens = skb_network_header_len(skb);
6333 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
6334 vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
6335
6336 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, type_tucmd,
6337 mss_l4len_idx);
6338
6339 return 1;
6340 }
6341
6342 static bool ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
6343 struct sk_buff *skb, u32 tx_flags,
6344 __be16 protocol)
6345 {
6346 u32 vlan_macip_lens = 0;
6347 u32 mss_l4len_idx = 0;
6348 u32 type_tucmd = 0;
6349
6350 if (skb->ip_summed != CHECKSUM_PARTIAL) {
6351 if (!(tx_flags & IXGBE_TX_FLAGS_VLAN))
6352 return false;
6353 } else {
6354 u8 l4_hdr = 0;
6355 switch (protocol) {
6356 case __constant_htons(ETH_P_IP):
6357 vlan_macip_lens |= skb_network_header_len(skb);
6358 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
6359 l4_hdr = ip_hdr(skb)->protocol;
6360 break;
6361 case __constant_htons(ETH_P_IPV6):
6362 vlan_macip_lens |= skb_network_header_len(skb);
6363 l4_hdr = ipv6_hdr(skb)->nexthdr;
6364 break;
6365 default:
6366 if (unlikely(net_ratelimit())) {
6367 dev_warn(tx_ring->dev,
6368 "partial checksum but proto=%x!\n",
6369 skb->protocol);
6370 }
6371 break;
6372 }
6373
6374 switch (l4_hdr) {
6375 case IPPROTO_TCP:
6376 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
6377 mss_l4len_idx = tcp_hdrlen(skb) <<
6378 IXGBE_ADVTXD_L4LEN_SHIFT;
6379 break;
6380 case IPPROTO_SCTP:
6381 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
6382 mss_l4len_idx = sizeof(struct sctphdr) <<
6383 IXGBE_ADVTXD_L4LEN_SHIFT;
6384 break;
6385 case IPPROTO_UDP:
6386 mss_l4len_idx = sizeof(struct udphdr) <<
6387 IXGBE_ADVTXD_L4LEN_SHIFT;
6388 break;
6389 default:
6390 if (unlikely(net_ratelimit())) {
6391 dev_warn(tx_ring->dev,
6392 "partial checksum but l4 proto=%x!\n",
6393 skb->protocol);
6394 }
6395 break;
6396 }
6397 }
6398
6399 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
6400 vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
6401
6402 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0,
6403 type_tucmd, mss_l4len_idx);
6404
6405 return (skb->ip_summed == CHECKSUM_PARTIAL);
6406 }
6407
6408 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
6409 struct ixgbe_ring *tx_ring,
6410 struct sk_buff *skb, u32 tx_flags,
6411 unsigned int first, const u8 hdr_len)
6412 {
6413 struct device *dev = tx_ring->dev;
6414 struct ixgbe_tx_buffer *tx_buffer_info;
6415 unsigned int len;
6416 unsigned int total = skb->len;
6417 unsigned int offset = 0, size, count = 0;
6418 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
6419 unsigned int f;
6420 unsigned int bytecount = skb->len;
6421 u16 gso_segs = 1;
6422 u16 i;
6423
6424 i = tx_ring->next_to_use;
6425
6426 if (tx_flags & IXGBE_TX_FLAGS_FCOE)
6427 /* excluding fcoe_crc_eof for FCoE */
6428 total -= sizeof(struct fcoe_crc_eof);
6429
6430 len = min(skb_headlen(skb), total);
6431 while (len) {
6432 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6433 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
6434
6435 tx_buffer_info->length = size;
6436 tx_buffer_info->mapped_as_page = false;
6437 tx_buffer_info->dma = dma_map_single(dev,
6438 skb->data + offset,
6439 size, DMA_TO_DEVICE);
6440 if (dma_mapping_error(dev, tx_buffer_info->dma))
6441 goto dma_error;
6442 tx_buffer_info->time_stamp = jiffies;
6443 tx_buffer_info->next_to_watch = i;
6444
6445 len -= size;
6446 total -= size;
6447 offset += size;
6448 count++;
6449
6450 if (len) {
6451 i++;
6452 if (i == tx_ring->count)
6453 i = 0;
6454 }
6455 }
6456
6457 for (f = 0; f < nr_frags; f++) {
6458 struct skb_frag_struct *frag;
6459
6460 frag = &skb_shinfo(skb)->frags[f];
6461 len = min((unsigned int)frag->size, total);
6462 offset = frag->page_offset;
6463
6464 while (len) {
6465 i++;
6466 if (i == tx_ring->count)
6467 i = 0;
6468
6469 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6470 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
6471
6472 tx_buffer_info->length = size;
6473 tx_buffer_info->dma = dma_map_page(dev,
6474 frag->page,
6475 offset, size,
6476 DMA_TO_DEVICE);
6477 tx_buffer_info->mapped_as_page = true;
6478 if (dma_mapping_error(dev, tx_buffer_info->dma))
6479 goto dma_error;
6480 tx_buffer_info->time_stamp = jiffies;
6481 tx_buffer_info->next_to_watch = i;
6482
6483 len -= size;
6484 total -= size;
6485 offset += size;
6486 count++;
6487 }
6488 if (total == 0)
6489 break;
6490 }
6491
6492 if (tx_flags & IXGBE_TX_FLAGS_TSO)
6493 gso_segs = skb_shinfo(skb)->gso_segs;
6494 #ifdef IXGBE_FCOE
6495 /* adjust for FCoE Sequence Offload */
6496 else if (tx_flags & IXGBE_TX_FLAGS_FSO)
6497 gso_segs = DIV_ROUND_UP(skb->len - hdr_len,
6498 skb_shinfo(skb)->gso_size);
6499 #endif /* IXGBE_FCOE */
6500 bytecount += (gso_segs - 1) * hdr_len;
6501
6502 /* multiply data chunks by size of headers */
6503 tx_ring->tx_buffer_info[i].bytecount = bytecount;
6504 tx_ring->tx_buffer_info[i].gso_segs = gso_segs;
6505 tx_ring->tx_buffer_info[i].skb = skb;
6506 tx_ring->tx_buffer_info[first].next_to_watch = i;
6507
6508 return count;
6509
6510 dma_error:
6511 e_dev_err("TX DMA map failed\n");
6512
6513 /* clear timestamp and dma mappings for failed tx_buffer_info map */
6514 tx_buffer_info->dma = 0;
6515 tx_buffer_info->time_stamp = 0;
6516 tx_buffer_info->next_to_watch = 0;
6517 if (count)
6518 count--;
6519
6520 /* clear timestamp and dma mappings for remaining portion of packet */
6521 while (count--) {
6522 if (i == 0)
6523 i += tx_ring->count;
6524 i--;
6525 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6526 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
6527 }
6528
6529 return 0;
6530 }
6531
6532 static void ixgbe_tx_queue(struct ixgbe_ring *tx_ring,
6533 int tx_flags, int count, u32 paylen, u8 hdr_len)
6534 {
6535 union ixgbe_adv_tx_desc *tx_desc = NULL;
6536 struct ixgbe_tx_buffer *tx_buffer_info;
6537 u32 olinfo_status = 0, cmd_type_len = 0;
6538 unsigned int i;
6539 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
6540
6541 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
6542
6543 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
6544
6545 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
6546 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
6547
6548 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
6549 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6550
6551 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6552 IXGBE_ADVTXD_POPTS_SHIFT;
6553
6554 /* use index 1 context for tso */
6555 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6556 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
6557 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
6558 IXGBE_ADVTXD_POPTS_SHIFT;
6559
6560 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
6561 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6562 IXGBE_ADVTXD_POPTS_SHIFT;
6563
6564 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6565 olinfo_status |= IXGBE_ADVTXD_CC;
6566 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6567 if (tx_flags & IXGBE_TX_FLAGS_FSO)
6568 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6569 }
6570
6571 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
6572
6573 i = tx_ring->next_to_use;
6574 while (count--) {
6575 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6576 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
6577 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
6578 tx_desc->read.cmd_type_len =
6579 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
6580 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
6581 i++;
6582 if (i == tx_ring->count)
6583 i = 0;
6584 }
6585
6586 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
6587
6588 /*
6589 * Force memory writes to complete before letting h/w
6590 * know there are new descriptors to fetch. (Only
6591 * applicable for weak-ordered memory model archs,
6592 * such as IA-64).
6593 */
6594 wmb();
6595
6596 tx_ring->next_to_use = i;
6597 writel(i, tx_ring->tail);
6598 }
6599
6600 static void ixgbe_atr(struct ixgbe_ring *ring, struct sk_buff *skb,
6601 u32 tx_flags, __be16 protocol)
6602 {
6603 struct ixgbe_q_vector *q_vector = ring->q_vector;
6604 union ixgbe_atr_hash_dword input = { .dword = 0 };
6605 union ixgbe_atr_hash_dword common = { .dword = 0 };
6606 union {
6607 unsigned char *network;
6608 struct iphdr *ipv4;
6609 struct ipv6hdr *ipv6;
6610 } hdr;
6611 struct tcphdr *th;
6612 __be16 vlan_id;
6613
6614 /* if ring doesn't have a interrupt vector, cannot perform ATR */
6615 if (!q_vector)
6616 return;
6617
6618 /* do nothing if sampling is disabled */
6619 if (!ring->atr_sample_rate)
6620 return;
6621
6622 ring->atr_count++;
6623
6624 /* snag network header to get L4 type and address */
6625 hdr.network = skb_network_header(skb);
6626
6627 /* Currently only IPv4/IPv6 with TCP is supported */
6628 if ((protocol != __constant_htons(ETH_P_IPV6) ||
6629 hdr.ipv6->nexthdr != IPPROTO_TCP) &&
6630 (protocol != __constant_htons(ETH_P_IP) ||
6631 hdr.ipv4->protocol != IPPROTO_TCP))
6632 return;
6633
6634 th = tcp_hdr(skb);
6635
6636 /* skip this packet since the socket is closing */
6637 if (th->fin)
6638 return;
6639
6640 /* sample on all syn packets or once every atr sample count */
6641 if (!th->syn && (ring->atr_count < ring->atr_sample_rate))
6642 return;
6643
6644 /* reset sample count */
6645 ring->atr_count = 0;
6646
6647 vlan_id = htons(tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT);
6648
6649 /*
6650 * src and dst are inverted, think how the receiver sees them
6651 *
6652 * The input is broken into two sections, a non-compressed section
6653 * containing vm_pool, vlan_id, and flow_type. The rest of the data
6654 * is XORed together and stored in the compressed dword.
6655 */
6656 input.formatted.vlan_id = vlan_id;
6657
6658 /*
6659 * since src port and flex bytes occupy the same word XOR them together
6660 * and write the value to source port portion of compressed dword
6661 */
6662 if (vlan_id)
6663 common.port.src ^= th->dest ^ __constant_htons(ETH_P_8021Q);
6664 else
6665 common.port.src ^= th->dest ^ protocol;
6666 common.port.dst ^= th->source;
6667
6668 if (protocol == __constant_htons(ETH_P_IP)) {
6669 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4;
6670 common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr;
6671 } else {
6672 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6;
6673 common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^
6674 hdr.ipv6->saddr.s6_addr32[1] ^
6675 hdr.ipv6->saddr.s6_addr32[2] ^
6676 hdr.ipv6->saddr.s6_addr32[3] ^
6677 hdr.ipv6->daddr.s6_addr32[0] ^
6678 hdr.ipv6->daddr.s6_addr32[1] ^
6679 hdr.ipv6->daddr.s6_addr32[2] ^
6680 hdr.ipv6->daddr.s6_addr32[3];
6681 }
6682
6683 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
6684 ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw,
6685 input, common, ring->queue_index);
6686 }
6687
6688 static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
6689 {
6690 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
6691 /* Herbert's original patch had:
6692 * smp_mb__after_netif_stop_queue();
6693 * but since that doesn't exist yet, just open code it. */
6694 smp_mb();
6695
6696 /* We need to check again in a case another CPU has just
6697 * made room available. */
6698 if (likely(ixgbe_desc_unused(tx_ring) < size))
6699 return -EBUSY;
6700
6701 /* A reprieve! - use start_queue because it doesn't call schedule */
6702 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
6703 ++tx_ring->tx_stats.restart_queue;
6704 return 0;
6705 }
6706
6707 static inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
6708 {
6709 if (likely(ixgbe_desc_unused(tx_ring) >= size))
6710 return 0;
6711 return __ixgbe_maybe_stop_tx(tx_ring, size);
6712 }
6713
6714 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
6715 {
6716 struct ixgbe_adapter *adapter = netdev_priv(dev);
6717 int txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) :
6718 smp_processor_id();
6719 #ifdef IXGBE_FCOE
6720 __be16 protocol = vlan_get_protocol(skb);
6721
6722 if (((protocol == htons(ETH_P_FCOE)) ||
6723 (protocol == htons(ETH_P_FIP))) &&
6724 (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) {
6725 txq &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
6726 txq += adapter->ring_feature[RING_F_FCOE].mask;
6727 return txq;
6728 }
6729 #endif
6730
6731 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
6732 while (unlikely(txq >= dev->real_num_tx_queues))
6733 txq -= dev->real_num_tx_queues;
6734 return txq;
6735 }
6736
6737 return skb_tx_hash(dev, skb);
6738 }
6739
6740 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
6741 struct ixgbe_adapter *adapter,
6742 struct ixgbe_ring *tx_ring)
6743 {
6744 int tso;
6745 u32 tx_flags = 0;
6746 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
6747 unsigned short f;
6748 #endif
6749 u16 first;
6750 u16 count = TXD_USE_COUNT(skb_headlen(skb));
6751 __be16 protocol;
6752 u8 hdr_len = 0;
6753
6754 /*
6755 * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
6756 * + 1 desc for skb_head_len/IXGBE_MAX_DATA_PER_TXD,
6757 * + 2 desc gap to keep tail from touching head,
6758 * + 1 desc for context descriptor,
6759 * otherwise try next time
6760 */
6761 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
6762 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
6763 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
6764 #else
6765 count += skb_shinfo(skb)->nr_frags;
6766 #endif
6767 if (ixgbe_maybe_stop_tx(tx_ring, count + 3)) {
6768 tx_ring->tx_stats.tx_busy++;
6769 return NETDEV_TX_BUSY;
6770 }
6771
6772 protocol = vlan_get_protocol(skb);
6773
6774 if (vlan_tx_tag_present(skb)) {
6775 tx_flags |= vlan_tx_tag_get(skb);
6776 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6777 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
6778 tx_flags |= tx_ring->dcb_tc << 13;
6779 }
6780 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6781 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6782 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED &&
6783 skb->priority != TC_PRIO_CONTROL) {
6784 tx_flags |= tx_ring->dcb_tc << 13;
6785 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6786 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6787 }
6788
6789 #ifdef IXGBE_FCOE
6790 /* for FCoE with DCB, we force the priority to what
6791 * was specified by the switch */
6792 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED &&
6793 (protocol == htons(ETH_P_FCOE)))
6794 tx_flags |= IXGBE_TX_FLAGS_FCOE;
6795
6796 #endif
6797 /* record the location of the first descriptor for this packet */
6798 first = tx_ring->next_to_use;
6799
6800 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6801 #ifdef IXGBE_FCOE
6802 /* setup tx offload for FCoE */
6803 tso = ixgbe_fso(tx_ring, skb, tx_flags, &hdr_len);
6804 if (tso < 0)
6805 goto out_drop;
6806 else if (tso)
6807 tx_flags |= IXGBE_TX_FLAGS_FSO;
6808 #endif /* IXGBE_FCOE */
6809 } else {
6810 if (protocol == htons(ETH_P_IP))
6811 tx_flags |= IXGBE_TX_FLAGS_IPV4;
6812 tso = ixgbe_tso(tx_ring, skb, tx_flags, protocol, &hdr_len);
6813 if (tso < 0)
6814 goto out_drop;
6815 else if (tso)
6816 tx_flags |= IXGBE_TX_FLAGS_TSO;
6817 else if (ixgbe_tx_csum(tx_ring, skb, tx_flags, protocol))
6818 tx_flags |= IXGBE_TX_FLAGS_CSUM;
6819 }
6820
6821 count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first, hdr_len);
6822 if (count) {
6823 /* add the ATR filter if ATR is on */
6824 if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state))
6825 ixgbe_atr(tx_ring, skb, tx_flags, protocol);
6826 ixgbe_tx_queue(tx_ring, tx_flags, count, skb->len, hdr_len);
6827 ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);
6828
6829 } else {
6830 tx_ring->tx_buffer_info[first].time_stamp = 0;
6831 tx_ring->next_to_use = first;
6832 goto out_drop;
6833 }
6834
6835 return NETDEV_TX_OK;
6836
6837 out_drop:
6838 dev_kfree_skb_any(skb);
6839 return NETDEV_TX_OK;
6840 }
6841
6842 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
6843 {
6844 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6845 struct ixgbe_ring *tx_ring;
6846
6847 tx_ring = adapter->tx_ring[skb->queue_mapping];
6848 return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
6849 }
6850
6851 /**
6852 * ixgbe_set_mac - Change the Ethernet Address of the NIC
6853 * @netdev: network interface device structure
6854 * @p: pointer to an address structure
6855 *
6856 * Returns 0 on success, negative on failure
6857 **/
6858 static int ixgbe_set_mac(struct net_device *netdev, void *p)
6859 {
6860 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6861 struct ixgbe_hw *hw = &adapter->hw;
6862 struct sockaddr *addr = p;
6863
6864 if (!is_valid_ether_addr(addr->sa_data))
6865 return -EADDRNOTAVAIL;
6866
6867 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
6868 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
6869
6870 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
6871 IXGBE_RAH_AV);
6872
6873 return 0;
6874 }
6875
6876 static int
6877 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
6878 {
6879 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6880 struct ixgbe_hw *hw = &adapter->hw;
6881 u16 value;
6882 int rc;
6883
6884 if (prtad != hw->phy.mdio.prtad)
6885 return -EINVAL;
6886 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
6887 if (!rc)
6888 rc = value;
6889 return rc;
6890 }
6891
6892 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
6893 u16 addr, u16 value)
6894 {
6895 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6896 struct ixgbe_hw *hw = &adapter->hw;
6897
6898 if (prtad != hw->phy.mdio.prtad)
6899 return -EINVAL;
6900 return hw->phy.ops.write_reg(hw, addr, devad, value);
6901 }
6902
6903 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
6904 {
6905 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6906
6907 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
6908 }
6909
6910 /**
6911 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
6912 * netdev->dev_addrs
6913 * @netdev: network interface device structure
6914 *
6915 * Returns non-zero on failure
6916 **/
6917 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
6918 {
6919 int err = 0;
6920 struct ixgbe_adapter *adapter = netdev_priv(dev);
6921 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6922
6923 if (is_valid_ether_addr(mac->san_addr)) {
6924 rtnl_lock();
6925 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6926 rtnl_unlock();
6927 }
6928 return err;
6929 }
6930
6931 /**
6932 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
6933 * netdev->dev_addrs
6934 * @netdev: network interface device structure
6935 *
6936 * Returns non-zero on failure
6937 **/
6938 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
6939 {
6940 int err = 0;
6941 struct ixgbe_adapter *adapter = netdev_priv(dev);
6942 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6943
6944 if (is_valid_ether_addr(mac->san_addr)) {
6945 rtnl_lock();
6946 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6947 rtnl_unlock();
6948 }
6949 return err;
6950 }
6951
6952 #ifdef CONFIG_NET_POLL_CONTROLLER
6953 /*
6954 * Polling 'interrupt' - used by things like netconsole to send skbs
6955 * without having to re-enable interrupts. It's not called while
6956 * the interrupt routine is executing.
6957 */
6958 static void ixgbe_netpoll(struct net_device *netdev)
6959 {
6960 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6961 int i;
6962
6963 /* if interface is down do nothing */
6964 if (test_bit(__IXGBE_DOWN, &adapter->state))
6965 return;
6966
6967 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
6968 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
6969 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
6970 for (i = 0; i < num_q_vectors; i++) {
6971 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
6972 ixgbe_msix_clean_many(0, q_vector);
6973 }
6974 } else {
6975 ixgbe_intr(adapter->pdev->irq, netdev);
6976 }
6977 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
6978 }
6979 #endif
6980
6981 static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
6982 struct rtnl_link_stats64 *stats)
6983 {
6984 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6985 int i;
6986
6987 rcu_read_lock();
6988 for (i = 0; i < adapter->num_rx_queues; i++) {
6989 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]);
6990 u64 bytes, packets;
6991 unsigned int start;
6992
6993 if (ring) {
6994 do {
6995 start = u64_stats_fetch_begin_bh(&ring->syncp);
6996 packets = ring->stats.packets;
6997 bytes = ring->stats.bytes;
6998 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
6999 stats->rx_packets += packets;
7000 stats->rx_bytes += bytes;
7001 }
7002 }
7003
7004 for (i = 0; i < adapter->num_tx_queues; i++) {
7005 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->tx_ring[i]);
7006 u64 bytes, packets;
7007 unsigned int start;
7008
7009 if (ring) {
7010 do {
7011 start = u64_stats_fetch_begin_bh(&ring->syncp);
7012 packets = ring->stats.packets;
7013 bytes = ring->stats.bytes;
7014 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
7015 stats->tx_packets += packets;
7016 stats->tx_bytes += bytes;
7017 }
7018 }
7019 rcu_read_unlock();
7020 /* following stats updated by ixgbe_watchdog_task() */
7021 stats->multicast = netdev->stats.multicast;
7022 stats->rx_errors = netdev->stats.rx_errors;
7023 stats->rx_length_errors = netdev->stats.rx_length_errors;
7024 stats->rx_crc_errors = netdev->stats.rx_crc_errors;
7025 stats->rx_missed_errors = netdev->stats.rx_missed_errors;
7026 return stats;
7027 }
7028
7029 /* ixgbe_validate_rtr - verify 802.1Qp to Rx packet buffer mapping is valid.
7030 * #adapter: pointer to ixgbe_adapter
7031 * @tc: number of traffic classes currently enabled
7032 *
7033 * Configure a valid 802.1Qp to Rx packet buffer mapping ie confirm
7034 * 802.1Q priority maps to a packet buffer that exists.
7035 */
7036 static void ixgbe_validate_rtr(struct ixgbe_adapter *adapter, u8 tc)
7037 {
7038 struct ixgbe_hw *hw = &adapter->hw;
7039 u32 reg, rsave;
7040 int i;
7041
7042 /* 82598 have a static priority to TC mapping that can not
7043 * be changed so no validation is needed.
7044 */
7045 if (hw->mac.type == ixgbe_mac_82598EB)
7046 return;
7047
7048 reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC);
7049 rsave = reg;
7050
7051 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
7052 u8 up2tc = reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT);
7053
7054 /* If up2tc is out of bounds default to zero */
7055 if (up2tc > tc)
7056 reg &= ~(0x7 << IXGBE_RTRUP2TC_UP_SHIFT);
7057 }
7058
7059 if (reg != rsave)
7060 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
7061
7062 return;
7063 }
7064
7065
7066 /* ixgbe_setup_tc - routine to configure net_device for multiple traffic
7067 * classes.
7068 *
7069 * @netdev: net device to configure
7070 * @tc: number of traffic classes to enable
7071 */
7072 int ixgbe_setup_tc(struct net_device *dev, u8 tc)
7073 {
7074 struct ixgbe_adapter *adapter = netdev_priv(dev);
7075 struct ixgbe_hw *hw = &adapter->hw;
7076
7077 /* If DCB is anabled do not remove traffic classes, multiple
7078 * traffic classes are required to implement DCB
7079 */
7080 if (!tc && (adapter->flags & IXGBE_FLAG_DCB_ENABLED))
7081 return 0;
7082
7083 /* Hardware supports up to 8 traffic classes */
7084 if (tc > MAX_TRAFFIC_CLASS ||
7085 (hw->mac.type == ixgbe_mac_82598EB && tc < MAX_TRAFFIC_CLASS))
7086 return -EINVAL;
7087
7088 /* Hardware has to reinitialize queues and interrupts to
7089 * match packet buffer alignment. Unfortunantly, the
7090 * hardware is not flexible enough to do this dynamically.
7091 */
7092 if (netif_running(dev))
7093 ixgbe_close(dev);
7094 ixgbe_clear_interrupt_scheme(adapter);
7095
7096 if (tc)
7097 netdev_set_num_tc(dev, tc);
7098 else
7099 netdev_reset_tc(dev);
7100
7101 ixgbe_init_interrupt_scheme(adapter);
7102 ixgbe_validate_rtr(adapter, tc);
7103 if (netif_running(dev))
7104 ixgbe_open(dev);
7105
7106 return 0;
7107 }
7108
7109 void ixgbe_do_reset(struct net_device *netdev)
7110 {
7111 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7112
7113 if (netif_running(netdev))
7114 ixgbe_reinit_locked(adapter);
7115 else
7116 ixgbe_reset(adapter);
7117 }
7118
7119 static u32 ixgbe_fix_features(struct net_device *netdev, u32 data)
7120 {
7121 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7122
7123 #ifdef CONFIG_DCB
7124 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
7125 data &= ~NETIF_F_HW_VLAN_RX;
7126 #endif
7127
7128 /* return error if RXHASH is being enabled when RSS is not supported */
7129 if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED))
7130 data &= ~NETIF_F_RXHASH;
7131
7132 /* If Rx checksum is disabled, then RSC/LRO should also be disabled */
7133 if (!(data & NETIF_F_RXCSUM))
7134 data &= ~NETIF_F_LRO;
7135
7136 /* Turn off LRO if not RSC capable or invalid ITR settings */
7137 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)) {
7138 data &= ~NETIF_F_LRO;
7139 } else if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
7140 (adapter->rx_itr_setting != 1 &&
7141 adapter->rx_itr_setting > IXGBE_MAX_RSC_INT_RATE)) {
7142 data &= ~NETIF_F_LRO;
7143 e_info(probe, "rx-usecs set too low, not enabling RSC\n");
7144 }
7145
7146 return data;
7147 }
7148
7149 static int ixgbe_set_features(struct net_device *netdev, u32 data)
7150 {
7151 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7152 bool need_reset = false;
7153
7154 /* If Rx checksum is disabled, then RSC/LRO should also be disabled */
7155 if (!(data & NETIF_F_RXCSUM))
7156 adapter->flags &= ~IXGBE_FLAG_RX_CSUM_ENABLED;
7157 else
7158 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
7159
7160 /* Make sure RSC matches LRO, reset if change */
7161 if (!!(data & NETIF_F_LRO) !=
7162 !!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)) {
7163 adapter->flags2 ^= IXGBE_FLAG2_RSC_ENABLED;
7164 switch (adapter->hw.mac.type) {
7165 case ixgbe_mac_X540:
7166 case ixgbe_mac_82599EB:
7167 need_reset = true;
7168 break;
7169 default:
7170 break;
7171 }
7172 }
7173
7174 /*
7175 * Check if Flow Director n-tuple support was enabled or disabled. If
7176 * the state changed, we need to reset.
7177 */
7178 if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)) {
7179 /* turn off ATR, enable perfect filters and reset */
7180 if (data & NETIF_F_NTUPLE) {
7181 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
7182 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
7183 need_reset = true;
7184 }
7185 } else if (!(data & NETIF_F_NTUPLE)) {
7186 /* turn off Flow Director, set ATR and reset */
7187 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
7188 if ((adapter->flags & IXGBE_FLAG_RSS_ENABLED) &&
7189 !(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
7190 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
7191 need_reset = true;
7192 }
7193
7194 if (need_reset)
7195 ixgbe_do_reset(netdev);
7196
7197 return 0;
7198
7199 }
7200
7201 static const struct net_device_ops ixgbe_netdev_ops = {
7202 .ndo_open = ixgbe_open,
7203 .ndo_stop = ixgbe_close,
7204 .ndo_start_xmit = ixgbe_xmit_frame,
7205 .ndo_select_queue = ixgbe_select_queue,
7206 .ndo_set_rx_mode = ixgbe_set_rx_mode,
7207 .ndo_set_multicast_list = ixgbe_set_rx_mode,
7208 .ndo_validate_addr = eth_validate_addr,
7209 .ndo_set_mac_address = ixgbe_set_mac,
7210 .ndo_change_mtu = ixgbe_change_mtu,
7211 .ndo_tx_timeout = ixgbe_tx_timeout,
7212 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
7213 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
7214 .ndo_do_ioctl = ixgbe_ioctl,
7215 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
7216 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
7217 .ndo_set_vf_tx_rate = ixgbe_ndo_set_vf_bw,
7218 .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
7219 .ndo_get_stats64 = ixgbe_get_stats64,
7220 .ndo_setup_tc = ixgbe_setup_tc,
7221 #ifdef CONFIG_NET_POLL_CONTROLLER
7222 .ndo_poll_controller = ixgbe_netpoll,
7223 #endif
7224 #ifdef IXGBE_FCOE
7225 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
7226 .ndo_fcoe_ddp_target = ixgbe_fcoe_ddp_target,
7227 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
7228 .ndo_fcoe_enable = ixgbe_fcoe_enable,
7229 .ndo_fcoe_disable = ixgbe_fcoe_disable,
7230 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
7231 #endif /* IXGBE_FCOE */
7232 .ndo_set_features = ixgbe_set_features,
7233 .ndo_fix_features = ixgbe_fix_features,
7234 };
7235
7236 static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter,
7237 const struct ixgbe_info *ii)
7238 {
7239 #ifdef CONFIG_PCI_IOV
7240 struct ixgbe_hw *hw = &adapter->hw;
7241 int err;
7242 int num_vf_macvlans, i;
7243 struct vf_macvlans *mv_list;
7244
7245 if (hw->mac.type == ixgbe_mac_82598EB || !max_vfs)
7246 return;
7247
7248 /* The 82599 supports up to 64 VFs per physical function
7249 * but this implementation limits allocation to 63 so that
7250 * basic networking resources are still available to the
7251 * physical function
7252 */
7253 adapter->num_vfs = (max_vfs > 63) ? 63 : max_vfs;
7254 adapter->flags |= IXGBE_FLAG_SRIOV_ENABLED;
7255 err = pci_enable_sriov(adapter->pdev, adapter->num_vfs);
7256 if (err) {
7257 e_err(probe, "Failed to enable PCI sriov: %d\n", err);
7258 goto err_novfs;
7259 }
7260
7261 num_vf_macvlans = hw->mac.num_rar_entries -
7262 (IXGBE_MAX_PF_MACVLANS + 1 + adapter->num_vfs);
7263
7264 adapter->mv_list = mv_list = kcalloc(num_vf_macvlans,
7265 sizeof(struct vf_macvlans),
7266 GFP_KERNEL);
7267 if (mv_list) {
7268 /* Initialize list of VF macvlans */
7269 INIT_LIST_HEAD(&adapter->vf_mvs.l);
7270 for (i = 0; i < num_vf_macvlans; i++) {
7271 mv_list->vf = -1;
7272 mv_list->free = true;
7273 mv_list->rar_entry = hw->mac.num_rar_entries -
7274 (i + adapter->num_vfs + 1);
7275 list_add(&mv_list->l, &adapter->vf_mvs.l);
7276 mv_list++;
7277 }
7278 }
7279
7280 /* If call to enable VFs succeeded then allocate memory
7281 * for per VF control structures.
7282 */
7283 adapter->vfinfo =
7284 kcalloc(adapter->num_vfs,
7285 sizeof(struct vf_data_storage), GFP_KERNEL);
7286 if (adapter->vfinfo) {
7287 /* Now that we're sure SR-IOV is enabled
7288 * and memory allocated set up the mailbox parameters
7289 */
7290 ixgbe_init_mbx_params_pf(hw);
7291 memcpy(&hw->mbx.ops, ii->mbx_ops,
7292 sizeof(hw->mbx.ops));
7293
7294 /* Disable RSC when in SR-IOV mode */
7295 adapter->flags2 &= ~(IXGBE_FLAG2_RSC_CAPABLE |
7296 IXGBE_FLAG2_RSC_ENABLED);
7297 return;
7298 }
7299
7300 /* Oh oh */
7301 e_err(probe, "Unable to allocate memory for VF Data Storage - "
7302 "SRIOV disabled\n");
7303 pci_disable_sriov(adapter->pdev);
7304
7305 err_novfs:
7306 adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
7307 adapter->num_vfs = 0;
7308 #endif /* CONFIG_PCI_IOV */
7309 }
7310
7311 /**
7312 * ixgbe_probe - Device Initialization Routine
7313 * @pdev: PCI device information struct
7314 * @ent: entry in ixgbe_pci_tbl
7315 *
7316 * Returns 0 on success, negative on failure
7317 *
7318 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
7319 * The OS initialization, configuring of the adapter private structure,
7320 * and a hardware reset occur.
7321 **/
7322 static int __devinit ixgbe_probe(struct pci_dev *pdev,
7323 const struct pci_device_id *ent)
7324 {
7325 struct net_device *netdev;
7326 struct ixgbe_adapter *adapter = NULL;
7327 struct ixgbe_hw *hw;
7328 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
7329 static int cards_found;
7330 int i, err, pci_using_dac;
7331 u8 part_str[IXGBE_PBANUM_LENGTH];
7332 unsigned int indices = num_possible_cpus();
7333 #ifdef IXGBE_FCOE
7334 u16 device_caps;
7335 #endif
7336 u32 eec;
7337
7338 /* Catch broken hardware that put the wrong VF device ID in
7339 * the PCIe SR-IOV capability.
7340 */
7341 if (pdev->is_virtfn) {
7342 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
7343 pci_name(pdev), pdev->vendor, pdev->device);
7344 return -EINVAL;
7345 }
7346
7347 err = pci_enable_device_mem(pdev);
7348 if (err)
7349 return err;
7350
7351 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
7352 !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
7353 pci_using_dac = 1;
7354 } else {
7355 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
7356 if (err) {
7357 err = dma_set_coherent_mask(&pdev->dev,
7358 DMA_BIT_MASK(32));
7359 if (err) {
7360 dev_err(&pdev->dev,
7361 "No usable DMA configuration, aborting\n");
7362 goto err_dma;
7363 }
7364 }
7365 pci_using_dac = 0;
7366 }
7367
7368 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
7369 IORESOURCE_MEM), ixgbe_driver_name);
7370 if (err) {
7371 dev_err(&pdev->dev,
7372 "pci_request_selected_regions failed 0x%x\n", err);
7373 goto err_pci_reg;
7374 }
7375
7376 pci_enable_pcie_error_reporting(pdev);
7377
7378 pci_set_master(pdev);
7379 pci_save_state(pdev);
7380
7381 #ifdef CONFIG_IXGBE_DCB
7382 indices *= MAX_TRAFFIC_CLASS;
7383 #endif
7384
7385 if (ii->mac == ixgbe_mac_82598EB)
7386 indices = min_t(unsigned int, indices, IXGBE_MAX_RSS_INDICES);
7387 else
7388 indices = min_t(unsigned int, indices, IXGBE_MAX_FDIR_INDICES);
7389
7390 #ifdef IXGBE_FCOE
7391 indices += min_t(unsigned int, num_possible_cpus(),
7392 IXGBE_MAX_FCOE_INDICES);
7393 #endif
7394 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
7395 if (!netdev) {
7396 err = -ENOMEM;
7397 goto err_alloc_etherdev;
7398 }
7399
7400 SET_NETDEV_DEV(netdev, &pdev->dev);
7401
7402 adapter = netdev_priv(netdev);
7403 pci_set_drvdata(pdev, adapter);
7404
7405 adapter->netdev = netdev;
7406 adapter->pdev = pdev;
7407 hw = &adapter->hw;
7408 hw->back = adapter;
7409 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
7410
7411 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
7412 pci_resource_len(pdev, 0));
7413 if (!hw->hw_addr) {
7414 err = -EIO;
7415 goto err_ioremap;
7416 }
7417
7418 for (i = 1; i <= 5; i++) {
7419 if (pci_resource_len(pdev, i) == 0)
7420 continue;
7421 }
7422
7423 netdev->netdev_ops = &ixgbe_netdev_ops;
7424 ixgbe_set_ethtool_ops(netdev);
7425 netdev->watchdog_timeo = 5 * HZ;
7426 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
7427
7428 adapter->bd_number = cards_found;
7429
7430 /* Setup hw api */
7431 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
7432 hw->mac.type = ii->mac;
7433
7434 /* EEPROM */
7435 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
7436 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
7437 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
7438 if (!(eec & (1 << 8)))
7439 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
7440
7441 /* PHY */
7442 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
7443 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
7444 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
7445 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
7446 hw->phy.mdio.mmds = 0;
7447 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
7448 hw->phy.mdio.dev = netdev;
7449 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
7450 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
7451
7452 ii->get_invariants(hw);
7453
7454 /* setup the private structure */
7455 err = ixgbe_sw_init(adapter);
7456 if (err)
7457 goto err_sw_init;
7458
7459 /* Make it possible the adapter to be woken up via WOL */
7460 switch (adapter->hw.mac.type) {
7461 case ixgbe_mac_82599EB:
7462 case ixgbe_mac_X540:
7463 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7464 break;
7465 default:
7466 break;
7467 }
7468
7469 /*
7470 * If there is a fan on this device and it has failed log the
7471 * failure.
7472 */
7473 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
7474 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
7475 if (esdp & IXGBE_ESDP_SDP1)
7476 e_crit(probe, "Fan has stopped, replace the adapter\n");
7477 }
7478
7479 /* reset_hw fills in the perm_addr as well */
7480 hw->phy.reset_if_overtemp = true;
7481 err = hw->mac.ops.reset_hw(hw);
7482 hw->phy.reset_if_overtemp = false;
7483 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
7484 hw->mac.type == ixgbe_mac_82598EB) {
7485 err = 0;
7486 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
7487 e_dev_err("failed to load because an unsupported SFP+ "
7488 "module type was detected.\n");
7489 e_dev_err("Reload the driver after installing a supported "
7490 "module.\n");
7491 goto err_sw_init;
7492 } else if (err) {
7493 e_dev_err("HW Init failed: %d\n", err);
7494 goto err_sw_init;
7495 }
7496
7497 ixgbe_probe_vf(adapter, ii);
7498
7499 netdev->features = NETIF_F_SG |
7500 NETIF_F_IP_CSUM |
7501 NETIF_F_IPV6_CSUM |
7502 NETIF_F_HW_VLAN_TX |
7503 NETIF_F_HW_VLAN_RX |
7504 NETIF_F_HW_VLAN_FILTER |
7505 NETIF_F_TSO |
7506 NETIF_F_TSO6 |
7507 NETIF_F_GRO |
7508 NETIF_F_RXHASH |
7509 NETIF_F_RXCSUM;
7510
7511 netdev->hw_features = netdev->features;
7512
7513 switch (adapter->hw.mac.type) {
7514 case ixgbe_mac_82599EB:
7515 case ixgbe_mac_X540:
7516 netdev->features |= NETIF_F_SCTP_CSUM;
7517 netdev->hw_features |= NETIF_F_SCTP_CSUM |
7518 NETIF_F_NTUPLE;
7519 break;
7520 default:
7521 break;
7522 }
7523
7524 netdev->vlan_features |= NETIF_F_TSO;
7525 netdev->vlan_features |= NETIF_F_TSO6;
7526 netdev->vlan_features |= NETIF_F_IP_CSUM;
7527 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
7528 netdev->vlan_features |= NETIF_F_SG;
7529
7530 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7531 adapter->flags &= ~(IXGBE_FLAG_RSS_ENABLED |
7532 IXGBE_FLAG_DCB_ENABLED);
7533
7534 #ifdef CONFIG_IXGBE_DCB
7535 netdev->dcbnl_ops = &dcbnl_ops;
7536 #endif
7537
7538 #ifdef IXGBE_FCOE
7539 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
7540 if (hw->mac.ops.get_device_caps) {
7541 hw->mac.ops.get_device_caps(hw, &device_caps);
7542 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
7543 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
7544 }
7545 }
7546 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
7547 netdev->vlan_features |= NETIF_F_FCOE_CRC;
7548 netdev->vlan_features |= NETIF_F_FSO;
7549 netdev->vlan_features |= NETIF_F_FCOE_MTU;
7550 }
7551 #endif /* IXGBE_FCOE */
7552 if (pci_using_dac) {
7553 netdev->features |= NETIF_F_HIGHDMA;
7554 netdev->vlan_features |= NETIF_F_HIGHDMA;
7555 }
7556
7557 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
7558 netdev->hw_features |= NETIF_F_LRO;
7559 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
7560 netdev->features |= NETIF_F_LRO;
7561
7562 /* make sure the EEPROM is good */
7563 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
7564 e_dev_err("The EEPROM Checksum Is Not Valid\n");
7565 err = -EIO;
7566 goto err_eeprom;
7567 }
7568
7569 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
7570 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
7571
7572 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
7573 e_dev_err("invalid MAC address\n");
7574 err = -EIO;
7575 goto err_eeprom;
7576 }
7577
7578 /* power down the optics for multispeed fiber and 82599 SFP+ fiber */
7579 if (hw->mac.ops.disable_tx_laser &&
7580 ((hw->phy.multispeed_fiber) ||
7581 ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
7582 (hw->mac.type == ixgbe_mac_82599EB))))
7583 hw->mac.ops.disable_tx_laser(hw);
7584
7585 setup_timer(&adapter->service_timer, &ixgbe_service_timer,
7586 (unsigned long) adapter);
7587
7588 INIT_WORK(&adapter->service_task, ixgbe_service_task);
7589 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
7590
7591 err = ixgbe_init_interrupt_scheme(adapter);
7592 if (err)
7593 goto err_sw_init;
7594
7595 if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED)) {
7596 netdev->hw_features &= ~NETIF_F_RXHASH;
7597 netdev->features &= ~NETIF_F_RXHASH;
7598 }
7599
7600 switch (pdev->device) {
7601 case IXGBE_DEV_ID_82599_SFP:
7602 /* Only this subdevice supports WOL */
7603 if (pdev->subsystem_device == IXGBE_SUBDEV_ID_82599_SFP)
7604 adapter->wol = IXGBE_WUFC_MAG;
7605 break;
7606 case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
7607 /* All except this subdevice support WOL */
7608 if (pdev->subsystem_device != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ)
7609 adapter->wol = IXGBE_WUFC_MAG;
7610 break;
7611 case IXGBE_DEV_ID_82599_KX4:
7612 adapter->wol = IXGBE_WUFC_MAG;
7613 break;
7614 default:
7615 adapter->wol = 0;
7616 break;
7617 }
7618 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
7619
7620 /* pick up the PCI bus settings for reporting later */
7621 hw->mac.ops.get_bus_info(hw);
7622
7623 /* print bus type/speed/width info */
7624 e_dev_info("(PCI Express:%s:%s) %pM\n",
7625 (hw->bus.speed == ixgbe_bus_speed_5000 ? "5.0GT/s" :
7626 hw->bus.speed == ixgbe_bus_speed_2500 ? "2.5GT/s" :
7627 "Unknown"),
7628 (hw->bus.width == ixgbe_bus_width_pcie_x8 ? "Width x8" :
7629 hw->bus.width == ixgbe_bus_width_pcie_x4 ? "Width x4" :
7630 hw->bus.width == ixgbe_bus_width_pcie_x1 ? "Width x1" :
7631 "Unknown"),
7632 netdev->dev_addr);
7633
7634 err = ixgbe_read_pba_string_generic(hw, part_str, IXGBE_PBANUM_LENGTH);
7635 if (err)
7636 strncpy(part_str, "Unknown", IXGBE_PBANUM_LENGTH);
7637 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
7638 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, PBA No: %s\n",
7639 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
7640 part_str);
7641 else
7642 e_dev_info("MAC: %d, PHY: %d, PBA No: %s\n",
7643 hw->mac.type, hw->phy.type, part_str);
7644
7645 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
7646 e_dev_warn("PCI-Express bandwidth available for this card is "
7647 "not sufficient for optimal performance.\n");
7648 e_dev_warn("For optimal performance a x8 PCI-Express slot "
7649 "is required.\n");
7650 }
7651
7652 /* save off EEPROM version number */
7653 hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
7654
7655 /* reset the hardware with the new settings */
7656 err = hw->mac.ops.start_hw(hw);
7657
7658 if (err == IXGBE_ERR_EEPROM_VERSION) {
7659 /* We are running on a pre-production device, log a warning */
7660 e_dev_warn("This device is a pre-production adapter/LOM. "
7661 "Please be aware there may be issues associated "
7662 "with your hardware. If you are experiencing "
7663 "problems please contact your Intel or hardware "
7664 "representative who provided you with this "
7665 "hardware.\n");
7666 }
7667 strcpy(netdev->name, "eth%d");
7668 err = register_netdev(netdev);
7669 if (err)
7670 goto err_register;
7671
7672 /* carrier off reporting is important to ethtool even BEFORE open */
7673 netif_carrier_off(netdev);
7674
7675 #ifdef CONFIG_IXGBE_DCA
7676 if (dca_add_requester(&pdev->dev) == 0) {
7677 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
7678 ixgbe_setup_dca(adapter);
7679 }
7680 #endif
7681 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
7682 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
7683 for (i = 0; i < adapter->num_vfs; i++)
7684 ixgbe_vf_configuration(pdev, (i | 0x10000000));
7685 }
7686
7687 /* Inform firmware of driver version */
7688 if (hw->mac.ops.set_fw_drv_ver)
7689 hw->mac.ops.set_fw_drv_ver(hw, MAJ, MIN, BUILD,
7690 FW_CEM_UNUSED_VER);
7691
7692 /* add san mac addr to netdev */
7693 ixgbe_add_sanmac_netdev(netdev);
7694
7695 e_dev_info("Intel(R) 10 Gigabit Network Connection\n");
7696 cards_found++;
7697 return 0;
7698
7699 err_register:
7700 ixgbe_release_hw_control(adapter);
7701 ixgbe_clear_interrupt_scheme(adapter);
7702 err_sw_init:
7703 err_eeprom:
7704 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7705 ixgbe_disable_sriov(adapter);
7706 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
7707 iounmap(hw->hw_addr);
7708 err_ioremap:
7709 free_netdev(netdev);
7710 err_alloc_etherdev:
7711 pci_release_selected_regions(pdev,
7712 pci_select_bars(pdev, IORESOURCE_MEM));
7713 err_pci_reg:
7714 err_dma:
7715 pci_disable_device(pdev);
7716 return err;
7717 }
7718
7719 /**
7720 * ixgbe_remove - Device Removal Routine
7721 * @pdev: PCI device information struct
7722 *
7723 * ixgbe_remove is called by the PCI subsystem to alert the driver
7724 * that it should release a PCI device. The could be caused by a
7725 * Hot-Plug event, or because the driver is going to be removed from
7726 * memory.
7727 **/
7728 static void __devexit ixgbe_remove(struct pci_dev *pdev)
7729 {
7730 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7731 struct net_device *netdev = adapter->netdev;
7732
7733 set_bit(__IXGBE_DOWN, &adapter->state);
7734 cancel_work_sync(&adapter->service_task);
7735
7736 #ifdef CONFIG_IXGBE_DCA
7737 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
7738 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
7739 dca_remove_requester(&pdev->dev);
7740 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
7741 }
7742
7743 #endif
7744 #ifdef IXGBE_FCOE
7745 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
7746 ixgbe_cleanup_fcoe(adapter);
7747
7748 #endif /* IXGBE_FCOE */
7749
7750 /* remove the added san mac */
7751 ixgbe_del_sanmac_netdev(netdev);
7752
7753 if (netdev->reg_state == NETREG_REGISTERED)
7754 unregister_netdev(netdev);
7755
7756 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7757 ixgbe_disable_sriov(adapter);
7758
7759 ixgbe_clear_interrupt_scheme(adapter);
7760
7761 ixgbe_release_hw_control(adapter);
7762
7763 iounmap(adapter->hw.hw_addr);
7764 pci_release_selected_regions(pdev, pci_select_bars(pdev,
7765 IORESOURCE_MEM));
7766
7767 e_dev_info("complete\n");
7768
7769 free_netdev(netdev);
7770
7771 pci_disable_pcie_error_reporting(pdev);
7772
7773 pci_disable_device(pdev);
7774 }
7775
7776 /**
7777 * ixgbe_io_error_detected - called when PCI error is detected
7778 * @pdev: Pointer to PCI device
7779 * @state: The current pci connection state
7780 *
7781 * This function is called after a PCI bus error affecting
7782 * this device has been detected.
7783 */
7784 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
7785 pci_channel_state_t state)
7786 {
7787 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7788 struct net_device *netdev = adapter->netdev;
7789
7790 netif_device_detach(netdev);
7791
7792 if (state == pci_channel_io_perm_failure)
7793 return PCI_ERS_RESULT_DISCONNECT;
7794
7795 if (netif_running(netdev))
7796 ixgbe_down(adapter);
7797 pci_disable_device(pdev);
7798
7799 /* Request a slot reset. */
7800 return PCI_ERS_RESULT_NEED_RESET;
7801 }
7802
7803 /**
7804 * ixgbe_io_slot_reset - called after the pci bus has been reset.
7805 * @pdev: Pointer to PCI device
7806 *
7807 * Restart the card from scratch, as if from a cold-boot.
7808 */
7809 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
7810 {
7811 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7812 pci_ers_result_t result;
7813 int err;
7814
7815 if (pci_enable_device_mem(pdev)) {
7816 e_err(probe, "Cannot re-enable PCI device after reset.\n");
7817 result = PCI_ERS_RESULT_DISCONNECT;
7818 } else {
7819 pci_set_master(pdev);
7820 pci_restore_state(pdev);
7821 pci_save_state(pdev);
7822
7823 pci_wake_from_d3(pdev, false);
7824
7825 ixgbe_reset(adapter);
7826 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7827 result = PCI_ERS_RESULT_RECOVERED;
7828 }
7829
7830 err = pci_cleanup_aer_uncorrect_error_status(pdev);
7831 if (err) {
7832 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
7833 "failed 0x%0x\n", err);
7834 /* non-fatal, continue */
7835 }
7836
7837 return result;
7838 }
7839
7840 /**
7841 * ixgbe_io_resume - called when traffic can start flowing again.
7842 * @pdev: Pointer to PCI device
7843 *
7844 * This callback is called when the error recovery driver tells us that
7845 * its OK to resume normal operation.
7846 */
7847 static void ixgbe_io_resume(struct pci_dev *pdev)
7848 {
7849 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7850 struct net_device *netdev = adapter->netdev;
7851
7852 if (netif_running(netdev)) {
7853 if (ixgbe_up(adapter)) {
7854 e_info(probe, "ixgbe_up failed after reset\n");
7855 return;
7856 }
7857 }
7858
7859 netif_device_attach(netdev);
7860 }
7861
7862 static struct pci_error_handlers ixgbe_err_handler = {
7863 .error_detected = ixgbe_io_error_detected,
7864 .slot_reset = ixgbe_io_slot_reset,
7865 .resume = ixgbe_io_resume,
7866 };
7867
7868 static struct pci_driver ixgbe_driver = {
7869 .name = ixgbe_driver_name,
7870 .id_table = ixgbe_pci_tbl,
7871 .probe = ixgbe_probe,
7872 .remove = __devexit_p(ixgbe_remove),
7873 #ifdef CONFIG_PM
7874 .suspend = ixgbe_suspend,
7875 .resume = ixgbe_resume,
7876 #endif
7877 .shutdown = ixgbe_shutdown,
7878 .err_handler = &ixgbe_err_handler
7879 };
7880
7881 /**
7882 * ixgbe_init_module - Driver Registration Routine
7883 *
7884 * ixgbe_init_module is the first routine called when the driver is
7885 * loaded. All it does is register with the PCI subsystem.
7886 **/
7887 static int __init ixgbe_init_module(void)
7888 {
7889 int ret;
7890 pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
7891 pr_info("%s\n", ixgbe_copyright);
7892
7893 #ifdef CONFIG_IXGBE_DCA
7894 dca_register_notify(&dca_notifier);
7895 #endif
7896
7897 ret = pci_register_driver(&ixgbe_driver);
7898 return ret;
7899 }
7900
7901 module_init(ixgbe_init_module);
7902
7903 /**
7904 * ixgbe_exit_module - Driver Exit Cleanup Routine
7905 *
7906 * ixgbe_exit_module is called just before the driver is removed
7907 * from memory.
7908 **/
7909 static void __exit ixgbe_exit_module(void)
7910 {
7911 #ifdef CONFIG_IXGBE_DCA
7912 dca_unregister_notify(&dca_notifier);
7913 #endif
7914 pci_unregister_driver(&ixgbe_driver);
7915 rcu_barrier(); /* Wait for completion of call_rcu()'s */
7916 }
7917
7918 #ifdef CONFIG_IXGBE_DCA
7919 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
7920 void *p)
7921 {
7922 int ret_val;
7923
7924 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
7925 __ixgbe_notify_dca);
7926
7927 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
7928 }
7929
7930 #endif /* CONFIG_IXGBE_DCA */
7931
7932 module_exit(ixgbe_exit_module);
7933
7934 /* ixgbe_main.c */
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