projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'packaging' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek...
[deliverable/linux.git] / drivers / net / ixgbe / ixgbe_main.c
1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2010 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/ip.h>
36 #include <linux/tcp.h>
37 #include <linux/pkt_sched.h>
38 #include <linux/ipv6.h>
39 #include <linux/slab.h>
40 #include <net/checksum.h>
41 #include <net/ip6_checksum.h>
42 #include <linux/ethtool.h>
43 #include <linux/if_vlan.h>
44 #include <scsi/fc/fc_fcoe.h>
45
46 #include "ixgbe.h"
47 #include "ixgbe_common.h"
48 #include "ixgbe_dcb_82599.h"
49 #include "ixgbe_sriov.h"
50
51 char ixgbe_driver_name[] = "ixgbe";
52 static const char ixgbe_driver_string[] =
53 "Intel(R) 10 Gigabit PCI Express Network Driver";
54
55 #define DRV_VERSION "2.0.84-k2"
56 const char ixgbe_driver_version[] = DRV_VERSION;
57 static char ixgbe_copyright[] = "Copyright (c) 1999-2010 Intel Corporation.";
58
59 static const struct ixgbe_info *ixgbe_info_tbl[] = {
60 [board_82598] = &ixgbe_82598_info,
61 [board_82599] = &ixgbe_82599_info,
62 };
63
64 /* ixgbe_pci_tbl - PCI Device ID Table
65 *
66 * Wildcard entries (PCI_ANY_ID) should come last
67 * Last entry must be all 0s
68 *
69 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
70 * Class, Class Mask, private data (not used) }
71 */
72 static DEFINE_PCI_DEVICE_TABLE(ixgbe_pci_tbl) = {
73 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598),
74 board_82598 },
75 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
76 board_82598 },
77 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
78 board_82598 },
79 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT),
80 board_82598 },
81 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2),
82 board_82598 },
83 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
84 board_82598 },
85 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT),
86 board_82598 },
87 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT),
88 board_82598 },
89 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM),
90 board_82598 },
91 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR),
92 board_82598 },
93 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM),
94 board_82598 },
95 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX),
96 board_82598 },
97 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4),
98 board_82599 },
99 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM),
100 board_82599 },
101 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR),
102 board_82599 },
103 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP),
104 board_82599 },
105 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM),
106 board_82599 },
107 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ),
108 board_82599 },
109 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4),
110 board_82599 },
111 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM),
112 board_82599 },
113 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE),
114 board_82599 },
115
116 /* required last entry */
117 {0, }
118 };
119 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
120
121 #ifdef CONFIG_IXGBE_DCA
122 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
123 void *p);
124 static struct notifier_block dca_notifier = {
125 .notifier_call = ixgbe_notify_dca,
126 .next = NULL,
127 .priority = 0
128 };
129 #endif
130
131 #ifdef CONFIG_PCI_IOV
132 static unsigned int max_vfs;
133 module_param(max_vfs, uint, 0);
134 MODULE_PARM_DESC(max_vfs,
135 "Maximum number of virtual functions to allocate per physical function");
136 #endif /* CONFIG_PCI_IOV */
137
138 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
139 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
140 MODULE_LICENSE("GPL");
141 MODULE_VERSION(DRV_VERSION);
142
143 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
144
145 static inline void ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
146 {
147 struct ixgbe_hw *hw = &adapter->hw;
148 u32 gcr;
149 u32 gpie;
150 u32 vmdctl;
151
152 #ifdef CONFIG_PCI_IOV
153 /* disable iov and allow time for transactions to clear */
154 pci_disable_sriov(adapter->pdev);
155 #endif
156
157 /* turn off device IOV mode */
158 gcr = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
159 gcr &= ~(IXGBE_GCR_EXT_SRIOV);
160 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr);
161 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
162 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
163 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
164
165 /* set default pool back to 0 */
166 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
167 vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
168 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
169
170 /* take a breather then clean up driver data */
171 msleep(100);
172
173 kfree(adapter->vfinfo);
174 adapter->vfinfo = NULL;
175
176 adapter->num_vfs = 0;
177 adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
178 }
179
180 struct ixgbe_reg_info {
181 u32 ofs;
182 char *name;
183 };
184
185 static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {
186
187 /* General Registers */
188 {IXGBE_CTRL, "CTRL"},
189 {IXGBE_STATUS, "STATUS"},
190 {IXGBE_CTRL_EXT, "CTRL_EXT"},
191
192 /* Interrupt Registers */
193 {IXGBE_EICR, "EICR"},
194
195 /* RX Registers */
196 {IXGBE_SRRCTL(0), "SRRCTL"},
197 {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
198 {IXGBE_RDLEN(0), "RDLEN"},
199 {IXGBE_RDH(0), "RDH"},
200 {IXGBE_RDT(0), "RDT"},
201 {IXGBE_RXDCTL(0), "RXDCTL"},
202 {IXGBE_RDBAL(0), "RDBAL"},
203 {IXGBE_RDBAH(0), "RDBAH"},
204
205 /* TX Registers */
206 {IXGBE_TDBAL(0), "TDBAL"},
207 {IXGBE_TDBAH(0), "TDBAH"},
208 {IXGBE_TDLEN(0), "TDLEN"},
209 {IXGBE_TDH(0), "TDH"},
210 {IXGBE_TDT(0), "TDT"},
211 {IXGBE_TXDCTL(0), "TXDCTL"},
212
213 /* List Terminator */
214 {}
215 };
216
217
218 /*
219 * ixgbe_regdump - register printout routine
220 */
221 static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
222 {
223 int i = 0, j = 0;
224 char rname[16];
225 u32 regs[64];
226
227 switch (reginfo->ofs) {
228 case IXGBE_SRRCTL(0):
229 for (i = 0; i < 64; i++)
230 regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
231 break;
232 case IXGBE_DCA_RXCTRL(0):
233 for (i = 0; i < 64; i++)
234 regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
235 break;
236 case IXGBE_RDLEN(0):
237 for (i = 0; i < 64; i++)
238 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
239 break;
240 case IXGBE_RDH(0):
241 for (i = 0; i < 64; i++)
242 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
243 break;
244 case IXGBE_RDT(0):
245 for (i = 0; i < 64; i++)
246 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
247 break;
248 case IXGBE_RXDCTL(0):
249 for (i = 0; i < 64; i++)
250 regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
251 break;
252 case IXGBE_RDBAL(0):
253 for (i = 0; i < 64; i++)
254 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
255 break;
256 case IXGBE_RDBAH(0):
257 for (i = 0; i < 64; i++)
258 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
259 break;
260 case IXGBE_TDBAL(0):
261 for (i = 0; i < 64; i++)
262 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
263 break;
264 case IXGBE_TDBAH(0):
265 for (i = 0; i < 64; i++)
266 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
267 break;
268 case IXGBE_TDLEN(0):
269 for (i = 0; i < 64; i++)
270 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
271 break;
272 case IXGBE_TDH(0):
273 for (i = 0; i < 64; i++)
274 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
275 break;
276 case IXGBE_TDT(0):
277 for (i = 0; i < 64; i++)
278 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
279 break;
280 case IXGBE_TXDCTL(0):
281 for (i = 0; i < 64; i++)
282 regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
283 break;
284 default:
285 pr_info("%-15s %08x\n", reginfo->name,
286 IXGBE_READ_REG(hw, reginfo->ofs));
287 return;
288 }
289
290 for (i = 0; i < 8; i++) {
291 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7);
292 pr_err("%-15s", rname);
293 for (j = 0; j < 8; j++)
294 pr_cont(" %08x", regs[i*8+j]);
295 pr_cont("\n");
296 }
297
298 }
299
300 /*
301 * ixgbe_dump - Print registers, tx-rings and rx-rings
302 */
303 static void ixgbe_dump(struct ixgbe_adapter *adapter)
304 {
305 struct net_device *netdev = adapter->netdev;
306 struct ixgbe_hw *hw = &adapter->hw;
307 struct ixgbe_reg_info *reginfo;
308 int n = 0;
309 struct ixgbe_ring *tx_ring;
310 struct ixgbe_tx_buffer *tx_buffer_info;
311 union ixgbe_adv_tx_desc *tx_desc;
312 struct my_u0 { u64 a; u64 b; } *u0;
313 struct ixgbe_ring *rx_ring;
314 union ixgbe_adv_rx_desc *rx_desc;
315 struct ixgbe_rx_buffer *rx_buffer_info;
316 u32 staterr;
317 int i = 0;
318
319 if (!netif_msg_hw(adapter))
320 return;
321
322 /* Print netdevice Info */
323 if (netdev) {
324 dev_info(&adapter->pdev->dev, "Net device Info\n");
325 pr_info("Device Name state "
326 "trans_start last_rx\n");
327 pr_info("%-15s %016lX %016lX %016lX\n",
328 netdev->name,
329 netdev->state,
330 netdev->trans_start,
331 netdev->last_rx);
332 }
333
334 /* Print Registers */
335 dev_info(&adapter->pdev->dev, "Register Dump\n");
336 pr_info(" Register Name Value\n");
337 for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
338 reginfo->name; reginfo++) {
339 ixgbe_regdump(hw, reginfo);
340 }
341
342 /* Print TX Ring Summary */
343 if (!netdev || !netif_running(netdev))
344 goto exit;
345
346 dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
347 pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n");
348 for (n = 0; n < adapter->num_tx_queues; n++) {
349 tx_ring = adapter->tx_ring[n];
350 tx_buffer_info =
351 &tx_ring->tx_buffer_info[tx_ring->next_to_clean];
352 pr_info(" %5d %5X %5X %016llX %04X %3X %016llX\n",
353 n, tx_ring->next_to_use, tx_ring->next_to_clean,
354 (u64)tx_buffer_info->dma,
355 tx_buffer_info->length,
356 tx_buffer_info->next_to_watch,
357 (u64)tx_buffer_info->time_stamp);
358 }
359
360 /* Print TX Rings */
361 if (!netif_msg_tx_done(adapter))
362 goto rx_ring_summary;
363
364 dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
365
366 /* Transmit Descriptor Formats
367 *
368 * Advanced Transmit Descriptor
369 * +--------------------------------------------------------------+
370 * 0 | Buffer Address [63:0] |
371 * +--------------------------------------------------------------+
372 * 8 | PAYLEN | PORTS | IDX | STA | DCMD |DTYP | RSV | DTALEN |
373 * +--------------------------------------------------------------+
374 * 63 46 45 40 39 36 35 32 31 24 23 20 19 0
375 */
376
377 for (n = 0; n < adapter->num_tx_queues; n++) {
378 tx_ring = adapter->tx_ring[n];
379 pr_info("------------------------------------\n");
380 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index);
381 pr_info("------------------------------------\n");
382 pr_info("T [desc] [address 63:0 ] "
383 "[PlPOIdStDDt Ln] [bi->dma ] "
384 "leng ntw timestamp bi->skb\n");
385
386 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
387 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
388 tx_buffer_info = &tx_ring->tx_buffer_info[i];
389 u0 = (struct my_u0 *)tx_desc;
390 pr_info("T [0x%03X] %016llX %016llX %016llX"
391 " %04X %3X %016llX %p", i,
392 le64_to_cpu(u0->a),
393 le64_to_cpu(u0->b),
394 (u64)tx_buffer_info->dma,
395 tx_buffer_info->length,
396 tx_buffer_info->next_to_watch,
397 (u64)tx_buffer_info->time_stamp,
398 tx_buffer_info->skb);
399 if (i == tx_ring->next_to_use &&
400 i == tx_ring->next_to_clean)
401 pr_cont(" NTC/U\n");
402 else if (i == tx_ring->next_to_use)
403 pr_cont(" NTU\n");
404 else if (i == tx_ring->next_to_clean)
405 pr_cont(" NTC\n");
406 else
407 pr_cont("\n");
408
409 if (netif_msg_pktdata(adapter) &&
410 tx_buffer_info->dma != 0)
411 print_hex_dump(KERN_INFO, "",
412 DUMP_PREFIX_ADDRESS, 16, 1,
413 phys_to_virt(tx_buffer_info->dma),
414 tx_buffer_info->length, true);
415 }
416 }
417
418 /* Print RX Rings Summary */
419 rx_ring_summary:
420 dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
421 pr_info("Queue [NTU] [NTC]\n");
422 for (n = 0; n < adapter->num_rx_queues; n++) {
423 rx_ring = adapter->rx_ring[n];
424 pr_info("%5d %5X %5X\n",
425 n, rx_ring->next_to_use, rx_ring->next_to_clean);
426 }
427
428 /* Print RX Rings */
429 if (!netif_msg_rx_status(adapter))
430 goto exit;
431
432 dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
433
434 /* Advanced Receive Descriptor (Read) Format
435 * 63 1 0
436 * +-----------------------------------------------------+
437 * 0 | Packet Buffer Address [63:1] |A0/NSE|
438 * +----------------------------------------------+------+
439 * 8 | Header Buffer Address [63:1] | DD |
440 * +-----------------------------------------------------+
441 *
442 *
443 * Advanced Receive Descriptor (Write-Back) Format
444 *
445 * 63 48 47 32 31 30 21 20 16 15 4 3 0
446 * +------------------------------------------------------+
447 * 0 | Packet IP |SPH| HDR_LEN | RSV|Packet| RSS |
448 * | Checksum Ident | | | | Type | Type |
449 * +------------------------------------------------------+
450 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
451 * +------------------------------------------------------+
452 * 63 48 47 32 31 20 19 0
453 */
454 for (n = 0; n < adapter->num_rx_queues; n++) {
455 rx_ring = adapter->rx_ring[n];
456 pr_info("------------------------------------\n");
457 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index);
458 pr_info("------------------------------------\n");
459 pr_info("R [desc] [ PktBuf A0] "
460 "[ HeadBuf DD] [bi->dma ] [bi->skb] "
461 "<-- Adv Rx Read format\n");
462 pr_info("RWB[desc] [PcsmIpSHl PtRs] "
463 "[vl er S cks ln] ---------------- [bi->skb] "
464 "<-- Adv Rx Write-Back format\n");
465
466 for (i = 0; i < rx_ring->count; i++) {
467 rx_buffer_info = &rx_ring->rx_buffer_info[i];
468 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
469 u0 = (struct my_u0 *)rx_desc;
470 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
471 if (staterr & IXGBE_RXD_STAT_DD) {
472 /* Descriptor Done */
473 pr_info("RWB[0x%03X] %016llX "
474 "%016llX ---------------- %p", i,
475 le64_to_cpu(u0->a),
476 le64_to_cpu(u0->b),
477 rx_buffer_info->skb);
478 } else {
479 pr_info("R [0x%03X] %016llX "
480 "%016llX %016llX %p", i,
481 le64_to_cpu(u0->a),
482 le64_to_cpu(u0->b),
483 (u64)rx_buffer_info->dma,
484 rx_buffer_info->skb);
485
486 if (netif_msg_pktdata(adapter)) {
487 print_hex_dump(KERN_INFO, "",
488 DUMP_PREFIX_ADDRESS, 16, 1,
489 phys_to_virt(rx_buffer_info->dma),
490 rx_ring->rx_buf_len, true);
491
492 if (rx_ring->rx_buf_len
493 < IXGBE_RXBUFFER_2048)
494 print_hex_dump(KERN_INFO, "",
495 DUMP_PREFIX_ADDRESS, 16, 1,
496 phys_to_virt(
497 rx_buffer_info->page_dma +
498 rx_buffer_info->page_offset
499 ),
500 PAGE_SIZE/2, true);
501 }
502 }
503
504 if (i == rx_ring->next_to_use)
505 pr_cont(" NTU\n");
506 else if (i == rx_ring->next_to_clean)
507 pr_cont(" NTC\n");
508 else
509 pr_cont("\n");
510
511 }
512 }
513
514 exit:
515 return;
516 }
517
518 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
519 {
520 u32 ctrl_ext;
521
522 /* Let firmware take over control of h/w */
523 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
524 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
525 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
526 }
527
528 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
529 {
530 u32 ctrl_ext;
531
532 /* Let firmware know the driver has taken over */
533 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
534 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
535 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
536 }
537
538 /*
539 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
540 * @adapter: pointer to adapter struct
541 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
542 * @queue: queue to map the corresponding interrupt to
543 * @msix_vector: the vector to map to the corresponding queue
544 *
545 */
546 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
547 u8 queue, u8 msix_vector)
548 {
549 u32 ivar, index;
550 struct ixgbe_hw *hw = &adapter->hw;
551 switch (hw->mac.type) {
552 case ixgbe_mac_82598EB:
553 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
554 if (direction == -1)
555 direction = 0;
556 index = (((direction * 64) + queue) >> 2) & 0x1F;
557 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
558 ivar &= ~(0xFF << (8 * (queue & 0x3)));
559 ivar |= (msix_vector << (8 * (queue & 0x3)));
560 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
561 break;
562 case ixgbe_mac_82599EB:
563 if (direction == -1) {
564 /* other causes */
565 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
566 index = ((queue & 1) * 8);
567 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
568 ivar &= ~(0xFF << index);
569 ivar |= (msix_vector << index);
570 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
571 break;
572 } else {
573 /* tx or rx causes */
574 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
575 index = ((16 * (queue & 1)) + (8 * direction));
576 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
577 ivar &= ~(0xFF << index);
578 ivar |= (msix_vector << index);
579 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
580 break;
581 }
582 default:
583 break;
584 }
585 }
586
587 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
588 u64 qmask)
589 {
590 u32 mask;
591
592 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
593 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
594 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
595 } else {
596 mask = (qmask & 0xFFFFFFFF);
597 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
598 mask = (qmask >> 32);
599 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
600 }
601 }
602
603 void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
604 struct ixgbe_tx_buffer
605 *tx_buffer_info)
606 {
607 if (tx_buffer_info->dma) {
608 if (tx_buffer_info->mapped_as_page)
609 dma_unmap_page(&adapter->pdev->dev,
610 tx_buffer_info->dma,
611 tx_buffer_info->length,
612 DMA_TO_DEVICE);
613 else
614 dma_unmap_single(&adapter->pdev->dev,
615 tx_buffer_info->dma,
616 tx_buffer_info->length,
617 DMA_TO_DEVICE);
618 tx_buffer_info->dma = 0;
619 }
620 if (tx_buffer_info->skb) {
621 dev_kfree_skb_any(tx_buffer_info->skb);
622 tx_buffer_info->skb = NULL;
623 }
624 tx_buffer_info->time_stamp = 0;
625 /* tx_buffer_info must be completely set up in the transmit path */
626 }
627
628 /**
629 * ixgbe_tx_xon_state - check the tx ring xon state
630 * @adapter: the ixgbe adapter
631 * @tx_ring: the corresponding tx_ring
632 *
633 * If not in DCB mode, checks TFCS.TXOFF, otherwise, find out the
634 * corresponding TC of this tx_ring when checking TFCS.
635 *
636 * Returns : true if in xon state (currently not paused)
637 */
638 static inline bool ixgbe_tx_xon_state(struct ixgbe_adapter *adapter,
639 struct ixgbe_ring *tx_ring)
640 {
641 u32 txoff = IXGBE_TFCS_TXOFF;
642
643 #ifdef CONFIG_IXGBE_DCB
644 if (adapter->dcb_cfg.pfc_mode_enable) {
645 int tc;
646 int reg_idx = tx_ring->reg_idx;
647 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
648
649 switch (adapter->hw.mac.type) {
650 case ixgbe_mac_82598EB:
651 tc = reg_idx >> 2;
652 txoff = IXGBE_TFCS_TXOFF0;
653 break;
654 case ixgbe_mac_82599EB:
655 tc = 0;
656 txoff = IXGBE_TFCS_TXOFF;
657 if (dcb_i == 8) {
658 /* TC0, TC1 */
659 tc = reg_idx >> 5;
660 if (tc == 2) /* TC2, TC3 */
661 tc += (reg_idx - 64) >> 4;
662 else if (tc == 3) /* TC4, TC5, TC6, TC7 */
663 tc += 1 + ((reg_idx - 96) >> 3);
664 } else if (dcb_i == 4) {
665 /* TC0, TC1 */
666 tc = reg_idx >> 6;
667 if (tc == 1) {
668 tc += (reg_idx - 64) >> 5;
669 if (tc == 2) /* TC2, TC3 */
670 tc += (reg_idx - 96) >> 4;
671 }
672 }
673 break;
674 default:
675 tc = 0;
676 }
677 txoff <<= tc;
678 }
679 #endif
680 return IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & txoff;
681 }
682
683 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
684 struct ixgbe_ring *tx_ring,
685 unsigned int eop)
686 {
687 struct ixgbe_hw *hw = &adapter->hw;
688
689 /* Detect a transmit hang in hardware, this serializes the
690 * check with the clearing of time_stamp and movement of eop */
691 adapter->detect_tx_hung = false;
692 if (tx_ring->tx_buffer_info[eop].time_stamp &&
693 time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
694 ixgbe_tx_xon_state(adapter, tx_ring)) {
695 /* detected Tx unit hang */
696 union ixgbe_adv_tx_desc *tx_desc;
697 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
698 e_err(drv, "Detected Tx Unit Hang\n"
699 " Tx Queue <%d>\n"
700 " TDH, TDT <%x>, <%x>\n"
701 " next_to_use <%x>\n"
702 " next_to_clean <%x>\n"
703 "tx_buffer_info[next_to_clean]\n"
704 " time_stamp <%lx>\n"
705 " jiffies <%lx>\n",
706 tx_ring->queue_index,
707 IXGBE_READ_REG(hw, tx_ring->head),
708 IXGBE_READ_REG(hw, tx_ring->tail),
709 tx_ring->next_to_use, eop,
710 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
711 return true;
712 }
713
714 return false;
715 }
716
717 #define IXGBE_MAX_TXD_PWR 14
718 #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
719
720 /* Tx Descriptors needed, worst case */
721 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
722 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
723 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
724 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
725
726 static void ixgbe_tx_timeout(struct net_device *netdev);
727
728 /**
729 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
730 * @q_vector: structure containing interrupt and ring information
731 * @tx_ring: tx ring to clean
732 **/
733 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
734 struct ixgbe_ring *tx_ring)
735 {
736 struct ixgbe_adapter *adapter = q_vector->adapter;
737 struct net_device *netdev = adapter->netdev;
738 union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
739 struct ixgbe_tx_buffer *tx_buffer_info;
740 unsigned int i, eop, count = 0;
741 unsigned int total_bytes = 0, total_packets = 0;
742
743 i = tx_ring->next_to_clean;
744 eop = tx_ring->tx_buffer_info[i].next_to_watch;
745 eop_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
746
747 while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
748 (count < tx_ring->work_limit)) {
749 bool cleaned = false;
750 rmb(); /* read buffer_info after eop_desc */
751 for ( ; !cleaned; count++) {
752 struct sk_buff *skb;
753 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
754 tx_buffer_info = &tx_ring->tx_buffer_info[i];
755 cleaned = (i == eop);
756 skb = tx_buffer_info->skb;
757
758 if (cleaned && skb) {
759 unsigned int segs, bytecount;
760 unsigned int hlen = skb_headlen(skb);
761
762 /* gso_segs is currently only valid for tcp */
763 segs = skb_shinfo(skb)->gso_segs ?: 1;
764 #ifdef IXGBE_FCOE
765 /* adjust for FCoE Sequence Offload */
766 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
767 && (skb->protocol == htons(ETH_P_FCOE)) &&
768 skb_is_gso(skb)) {
769 hlen = skb_transport_offset(skb) +
770 sizeof(struct fc_frame_header) +
771 sizeof(struct fcoe_crc_eof);
772 segs = DIV_ROUND_UP(skb->len - hlen,
773 skb_shinfo(skb)->gso_size);
774 }
775 #endif /* IXGBE_FCOE */
776 /* multiply data chunks by size of headers */
777 bytecount = ((segs - 1) * hlen) + skb->len;
778 total_packets += segs;
779 total_bytes += bytecount;
780 }
781
782 ixgbe_unmap_and_free_tx_resource(adapter,
783 tx_buffer_info);
784
785 tx_desc->wb.status = 0;
786
787 i++;
788 if (i == tx_ring->count)
789 i = 0;
790 }
791
792 eop = tx_ring->tx_buffer_info[i].next_to_watch;
793 eop_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
794 }
795
796 tx_ring->next_to_clean = i;
797
798 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
799 if (unlikely(count && netif_carrier_ok(netdev) &&
800 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
801 /* Make sure that anybody stopping the queue after this
802 * sees the new next_to_clean.
803 */
804 smp_mb();
805 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
806 !test_bit(__IXGBE_DOWN, &adapter->state)) {
807 netif_wake_subqueue(netdev, tx_ring->queue_index);
808 ++tx_ring->restart_queue;
809 }
810 }
811
812 if (adapter->detect_tx_hung) {
813 if (ixgbe_check_tx_hang(adapter, tx_ring, i)) {
814 /* schedule immediate reset if we believe we hung */
815 e_info(probe, "tx hang %d detected, resetting "
816 "adapter\n", adapter->tx_timeout_count + 1);
817 ixgbe_tx_timeout(adapter->netdev);
818 }
819 }
820
821 /* re-arm the interrupt */
822 if (count >= tx_ring->work_limit)
823 ixgbe_irq_rearm_queues(adapter, ((u64)1 << q_vector->v_idx));
824
825 tx_ring->total_bytes += total_bytes;
826 tx_ring->total_packets += total_packets;
827 u64_stats_update_begin(&tx_ring->syncp);
828 tx_ring->stats.packets += total_packets;
829 tx_ring->stats.bytes += total_bytes;
830 u64_stats_update_end(&tx_ring->syncp);
831 return count < tx_ring->work_limit;
832 }
833
834 #ifdef CONFIG_IXGBE_DCA
835 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
836 struct ixgbe_ring *rx_ring)
837 {
838 u32 rxctrl;
839 int cpu = get_cpu();
840 int q = rx_ring->reg_idx;
841
842 if (rx_ring->cpu != cpu) {
843 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
844 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
845 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
846 rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
847 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
848 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
849 rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
850 IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
851 }
852 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
853 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
854 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
855 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_WRO_EN |
856 IXGBE_DCA_RXCTRL_DESC_HSRO_EN);
857 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
858 rx_ring->cpu = cpu;
859 }
860 put_cpu();
861 }
862
863 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
864 struct ixgbe_ring *tx_ring)
865 {
866 u32 txctrl;
867 int cpu = get_cpu();
868 int q = tx_ring->reg_idx;
869 struct ixgbe_hw *hw = &adapter->hw;
870
871 if (tx_ring->cpu != cpu) {
872 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
873 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(q));
874 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
875 txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
876 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
877 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(q), txctrl);
878 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
879 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(q));
880 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
881 txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
882 IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
883 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
884 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(q), txctrl);
885 }
886 tx_ring->cpu = cpu;
887 }
888 put_cpu();
889 }
890
891 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
892 {
893 int i;
894
895 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
896 return;
897
898 /* always use CB2 mode, difference is masked in the CB driver */
899 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
900
901 for (i = 0; i < adapter->num_tx_queues; i++) {
902 adapter->tx_ring[i]->cpu = -1;
903 ixgbe_update_tx_dca(adapter, adapter->tx_ring[i]);
904 }
905 for (i = 0; i < adapter->num_rx_queues; i++) {
906 adapter->rx_ring[i]->cpu = -1;
907 ixgbe_update_rx_dca(adapter, adapter->rx_ring[i]);
908 }
909 }
910
911 static int __ixgbe_notify_dca(struct device *dev, void *data)
912 {
913 struct net_device *netdev = dev_get_drvdata(dev);
914 struct ixgbe_adapter *adapter = netdev_priv(netdev);
915 unsigned long event = *(unsigned long *)data;
916
917 switch (event) {
918 case DCA_PROVIDER_ADD:
919 /* if we're already enabled, don't do it again */
920 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
921 break;
922 if (dca_add_requester(dev) == 0) {
923 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
924 ixgbe_setup_dca(adapter);
925 break;
926 }
927 /* Fall Through since DCA is disabled. */
928 case DCA_PROVIDER_REMOVE:
929 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
930 dca_remove_requester(dev);
931 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
932 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
933 }
934 break;
935 }
936
937 return 0;
938 }
939
940 #endif /* CONFIG_IXGBE_DCA */
941 /**
942 * ixgbe_receive_skb - Send a completed packet up the stack
943 * @adapter: board private structure
944 * @skb: packet to send up
945 * @status: hardware indication of status of receive
946 * @rx_ring: rx descriptor ring (for a specific queue) to setup
947 * @rx_desc: rx descriptor
948 **/
949 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
950 struct sk_buff *skb, u8 status,
951 struct ixgbe_ring *ring,
952 union ixgbe_adv_rx_desc *rx_desc)
953 {
954 struct ixgbe_adapter *adapter = q_vector->adapter;
955 struct napi_struct *napi = &q_vector->napi;
956 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
957 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
958
959 if (is_vlan && (tag & VLAN_VID_MASK))
960 __vlan_hwaccel_put_tag(skb, tag);
961
962 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
963 napi_gro_receive(napi, skb);
964 else
965 netif_rx(skb);
966 }
967
968 /**
969 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
970 * @adapter: address of board private structure
971 * @status_err: hardware indication of status of receive
972 * @skb: skb currently being received and modified
973 **/
974 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
975 union ixgbe_adv_rx_desc *rx_desc,
976 struct sk_buff *skb)
977 {
978 u32 status_err = le32_to_cpu(rx_desc->wb.upper.status_error);
979
980 skb_checksum_none_assert(skb);
981
982 /* Rx csum disabled */
983 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
984 return;
985
986 /* if IP and error */
987 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
988 (status_err & IXGBE_RXDADV_ERR_IPE)) {
989 adapter->hw_csum_rx_error++;
990 return;
991 }
992
993 if (!(status_err & IXGBE_RXD_STAT_L4CS))
994 return;
995
996 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
997 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
998
999 /*
1000 * 82599 errata, UDP frames with a 0 checksum can be marked as
1001 * checksum errors.
1002 */
1003 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
1004 (adapter->hw.mac.type == ixgbe_mac_82599EB))
1005 return;
1006
1007 adapter->hw_csum_rx_error++;
1008 return;
1009 }
1010
1011 /* It must be a TCP or UDP packet with a valid checksum */
1012 skb->ip_summed = CHECKSUM_UNNECESSARY;
1013 }
1014
1015 static inline void ixgbe_release_rx_desc(struct ixgbe_hw *hw,
1016 struct ixgbe_ring *rx_ring, u32 val)
1017 {
1018 /*
1019 * Force memory writes to complete before letting h/w
1020 * know there are new descriptors to fetch. (Only
1021 * applicable for weak-ordered memory model archs,
1022 * such as IA-64).
1023 */
1024 wmb();
1025 IXGBE_WRITE_REG(hw, IXGBE_RDT(rx_ring->reg_idx), val);
1026 }
1027
1028 /**
1029 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
1030 * @adapter: address of board private structure
1031 **/
1032 void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
1033 struct ixgbe_ring *rx_ring,
1034 int cleaned_count)
1035 {
1036 struct net_device *netdev = adapter->netdev;
1037 struct pci_dev *pdev = adapter->pdev;
1038 union ixgbe_adv_rx_desc *rx_desc;
1039 struct ixgbe_rx_buffer *bi;
1040 unsigned int i;
1041 unsigned int bufsz = rx_ring->rx_buf_len;
1042
1043 i = rx_ring->next_to_use;
1044 bi = &rx_ring->rx_buffer_info[i];
1045
1046 while (cleaned_count--) {
1047 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1048
1049 if (!bi->page_dma &&
1050 (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)) {
1051 if (!bi->page) {
1052 bi->page = netdev_alloc_page(netdev);
1053 if (!bi->page) {
1054 adapter->alloc_rx_page_failed++;
1055 goto no_buffers;
1056 }
1057 bi->page_offset = 0;
1058 } else {
1059 /* use a half page if we're re-using */
1060 bi->page_offset ^= (PAGE_SIZE / 2);
1061 }
1062
1063 bi->page_dma = dma_map_page(&pdev->dev, bi->page,
1064 bi->page_offset,
1065 (PAGE_SIZE / 2),
1066 DMA_FROM_DEVICE);
1067 }
1068
1069 if (!bi->skb) {
1070 struct sk_buff *skb = netdev_alloc_skb_ip_align(netdev,
1071 bufsz);
1072 bi->skb = skb;
1073
1074 if (!skb) {
1075 adapter->alloc_rx_buff_failed++;
1076 goto no_buffers;
1077 }
1078 /* initialize queue mapping */
1079 skb_record_rx_queue(skb, rx_ring->queue_index);
1080 }
1081
1082 if (!bi->dma) {
1083 bi->dma = dma_map_single(&pdev->dev,
1084 bi->skb->data,
1085 rx_ring->rx_buf_len,
1086 DMA_FROM_DEVICE);
1087 }
1088 /* Refresh the desc even if buffer_addrs didn't change because
1089 * each write-back erases this info. */
1090 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1091 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
1092 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
1093 } else {
1094 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
1095 rx_desc->read.hdr_addr = 0;
1096 }
1097
1098 i++;
1099 if (i == rx_ring->count)
1100 i = 0;
1101 bi = &rx_ring->rx_buffer_info[i];
1102 }
1103
1104 no_buffers:
1105 if (rx_ring->next_to_use != i) {
1106 rx_ring->next_to_use = i;
1107 if (i-- == 0)
1108 i = (rx_ring->count - 1);
1109
1110 ixgbe_release_rx_desc(&adapter->hw, rx_ring, i);
1111 }
1112 }
1113
1114 static inline u16 ixgbe_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
1115 {
1116 return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
1117 }
1118
1119 static inline u16 ixgbe_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
1120 {
1121 return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1122 }
1123
1124 static inline u32 ixgbe_get_rsc_count(union ixgbe_adv_rx_desc *rx_desc)
1125 {
1126 return (le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
1127 IXGBE_RXDADV_RSCCNT_MASK) >>
1128 IXGBE_RXDADV_RSCCNT_SHIFT;
1129 }
1130
1131 /**
1132 * ixgbe_transform_rsc_queue - change rsc queue into a full packet
1133 * @skb: pointer to the last skb in the rsc queue
1134 * @count: pointer to number of packets coalesced in this context
1135 *
1136 * This function changes a queue full of hw rsc buffers into a completed
1137 * packet. It uses the ->prev pointers to find the first packet and then
1138 * turns it into the frag list owner.
1139 **/
1140 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb,
1141 u64 *count)
1142 {
1143 unsigned int frag_list_size = 0;
1144
1145 while (skb->prev) {
1146 struct sk_buff *prev = skb->prev;
1147 frag_list_size += skb->len;
1148 skb->prev = NULL;
1149 skb = prev;
1150 *count += 1;
1151 }
1152
1153 skb_shinfo(skb)->frag_list = skb->next;
1154 skb->next = NULL;
1155 skb->len += frag_list_size;
1156 skb->data_len += frag_list_size;
1157 skb->truesize += frag_list_size;
1158 return skb;
1159 }
1160
1161 struct ixgbe_rsc_cb {
1162 dma_addr_t dma;
1163 bool delay_unmap;
1164 };
1165
1166 #define IXGBE_RSC_CB(skb) ((struct ixgbe_rsc_cb *)(skb)->cb)
1167
1168 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
1169 struct ixgbe_ring *rx_ring,
1170 int *work_done, int work_to_do)
1171 {
1172 struct ixgbe_adapter *adapter = q_vector->adapter;
1173 struct pci_dev *pdev = adapter->pdev;
1174 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
1175 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
1176 struct sk_buff *skb;
1177 unsigned int i, rsc_count = 0;
1178 u32 len, staterr;
1179 u16 hdr_info;
1180 bool cleaned = false;
1181 int cleaned_count = 0;
1182 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1183 #ifdef IXGBE_FCOE
1184 int ddp_bytes = 0;
1185 #endif /* IXGBE_FCOE */
1186
1187 i = rx_ring->next_to_clean;
1188 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1189 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1190 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1191
1192 while (staterr & IXGBE_RXD_STAT_DD) {
1193 u32 upper_len = 0;
1194 if (*work_done >= work_to_do)
1195 break;
1196 (*work_done)++;
1197
1198 rmb(); /* read descriptor and rx_buffer_info after status DD */
1199 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1200 hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
1201 len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
1202 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
1203 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
1204 if ((len > IXGBE_RX_HDR_SIZE) ||
1205 (upper_len && !(hdr_info & IXGBE_RXDADV_SPH)))
1206 len = IXGBE_RX_HDR_SIZE;
1207 } else {
1208 len = le16_to_cpu(rx_desc->wb.upper.length);
1209 }
1210
1211 cleaned = true;
1212 skb = rx_buffer_info->skb;
1213 prefetch(skb->data);
1214 rx_buffer_info->skb = NULL;
1215
1216 if (rx_buffer_info->dma) {
1217 if ((adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
1218 (!(staterr & IXGBE_RXD_STAT_EOP)) &&
1219 (!(skb->prev))) {
1220 /*
1221 * When HWRSC is enabled, delay unmapping
1222 * of the first packet. It carries the
1223 * header information, HW may still
1224 * access the header after the writeback.
1225 * Only unmap it when EOP is reached
1226 */
1227 IXGBE_RSC_CB(skb)->delay_unmap = true;
1228 IXGBE_RSC_CB(skb)->dma = rx_buffer_info->dma;
1229 } else {
1230 dma_unmap_single(&pdev->dev,
1231 rx_buffer_info->dma,
1232 rx_ring->rx_buf_len,
1233 DMA_FROM_DEVICE);
1234 }
1235 rx_buffer_info->dma = 0;
1236 skb_put(skb, len);
1237 }
1238
1239 if (upper_len) {
1240 dma_unmap_page(&pdev->dev, rx_buffer_info->page_dma,
1241 PAGE_SIZE / 2, DMA_FROM_DEVICE);
1242 rx_buffer_info->page_dma = 0;
1243 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
1244 rx_buffer_info->page,
1245 rx_buffer_info->page_offset,
1246 upper_len);
1247
1248 if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
1249 (page_count(rx_buffer_info->page) != 1))
1250 rx_buffer_info->page = NULL;
1251 else
1252 get_page(rx_buffer_info->page);
1253
1254 skb->len += upper_len;
1255 skb->data_len += upper_len;
1256 skb->truesize += upper_len;
1257 }
1258
1259 i++;
1260 if (i == rx_ring->count)
1261 i = 0;
1262
1263 next_rxd = IXGBE_RX_DESC_ADV(rx_ring, i);
1264 prefetch(next_rxd);
1265 cleaned_count++;
1266
1267 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
1268 rsc_count = ixgbe_get_rsc_count(rx_desc);
1269
1270 if (rsc_count) {
1271 u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
1272 IXGBE_RXDADV_NEXTP_SHIFT;
1273 next_buffer = &rx_ring->rx_buffer_info[nextp];
1274 } else {
1275 next_buffer = &rx_ring->rx_buffer_info[i];
1276 }
1277
1278 if (staterr & IXGBE_RXD_STAT_EOP) {
1279 if (skb->prev)
1280 skb = ixgbe_transform_rsc_queue(skb,
1281 &(rx_ring->rsc_count));
1282 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
1283 if (IXGBE_RSC_CB(skb)->delay_unmap) {
1284 dma_unmap_single(&pdev->dev,
1285 IXGBE_RSC_CB(skb)->dma,
1286 rx_ring->rx_buf_len,
1287 DMA_FROM_DEVICE);
1288 IXGBE_RSC_CB(skb)->dma = 0;
1289 IXGBE_RSC_CB(skb)->delay_unmap = false;
1290 }
1291 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)
1292 rx_ring->rsc_count +=
1293 skb_shinfo(skb)->nr_frags;
1294 else
1295 rx_ring->rsc_count++;
1296 rx_ring->rsc_flush++;
1297 }
1298 u64_stats_update_begin(&rx_ring->syncp);
1299 rx_ring->stats.packets++;
1300 rx_ring->stats.bytes += skb->len;
1301 u64_stats_update_end(&rx_ring->syncp);
1302 } else {
1303 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1304 rx_buffer_info->skb = next_buffer->skb;
1305 rx_buffer_info->dma = next_buffer->dma;
1306 next_buffer->skb = skb;
1307 next_buffer->dma = 0;
1308 } else {
1309 skb->next = next_buffer->skb;
1310 skb->next->prev = skb;
1311 }
1312 rx_ring->non_eop_descs++;
1313 goto next_desc;
1314 }
1315
1316 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
1317 dev_kfree_skb_irq(skb);
1318 goto next_desc;
1319 }
1320
1321 ixgbe_rx_checksum(adapter, rx_desc, skb);
1322
1323 /* probably a little skewed due to removing CRC */
1324 total_rx_bytes += skb->len;
1325 total_rx_packets++;
1326
1327 skb->protocol = eth_type_trans(skb, adapter->netdev);
1328 #ifdef IXGBE_FCOE
1329 /* if ddp, not passing to ULD unless for FCP_RSP or error */
1330 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
1331 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
1332 if (!ddp_bytes)
1333 goto next_desc;
1334 }
1335 #endif /* IXGBE_FCOE */
1336 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
1337
1338 next_desc:
1339 rx_desc->wb.upper.status_error = 0;
1340
1341 /* return some buffers to hardware, one at a time is too slow */
1342 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
1343 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
1344 cleaned_count = 0;
1345 }
1346
1347 /* use prefetched values */
1348 rx_desc = next_rxd;
1349 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1350
1351 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1352 }
1353
1354 rx_ring->next_to_clean = i;
1355 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
1356
1357 if (cleaned_count)
1358 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
1359
1360 #ifdef IXGBE_FCOE
1361 /* include DDPed FCoE data */
1362 if (ddp_bytes > 0) {
1363 unsigned int mss;
1364
1365 mss = adapter->netdev->mtu - sizeof(struct fcoe_hdr) -
1366 sizeof(struct fc_frame_header) -
1367 sizeof(struct fcoe_crc_eof);
1368 if (mss > 512)
1369 mss &= ~511;
1370 total_rx_bytes += ddp_bytes;
1371 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
1372 }
1373 #endif /* IXGBE_FCOE */
1374
1375 rx_ring->total_packets += total_rx_packets;
1376 rx_ring->total_bytes += total_rx_bytes;
1377
1378 return cleaned;
1379 }
1380
1381 static int ixgbe_clean_rxonly(struct napi_struct *, int);
1382 /**
1383 * ixgbe_configure_msix - Configure MSI-X hardware
1384 * @adapter: board private structure
1385 *
1386 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
1387 * interrupts.
1388 **/
1389 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
1390 {
1391 struct ixgbe_q_vector *q_vector;
1392 int i, j, q_vectors, v_idx, r_idx;
1393 u32 mask;
1394
1395 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1396
1397 /*
1398 * Populate the IVAR table and set the ITR values to the
1399 * corresponding register.
1400 */
1401 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1402 q_vector = adapter->q_vector[v_idx];
1403 /* XXX for_each_set_bit(...) */
1404 r_idx = find_first_bit(q_vector->rxr_idx,
1405 adapter->num_rx_queues);
1406
1407 for (i = 0; i < q_vector->rxr_count; i++) {
1408 j = adapter->rx_ring[r_idx]->reg_idx;
1409 ixgbe_set_ivar(adapter, 0, j, v_idx);
1410 r_idx = find_next_bit(q_vector->rxr_idx,
1411 adapter->num_rx_queues,
1412 r_idx + 1);
1413 }
1414 r_idx = find_first_bit(q_vector->txr_idx,
1415 adapter->num_tx_queues);
1416
1417 for (i = 0; i < q_vector->txr_count; i++) {
1418 j = adapter->tx_ring[r_idx]->reg_idx;
1419 ixgbe_set_ivar(adapter, 1, j, v_idx);
1420 r_idx = find_next_bit(q_vector->txr_idx,
1421 adapter->num_tx_queues,
1422 r_idx + 1);
1423 }
1424
1425 if (q_vector->txr_count && !q_vector->rxr_count)
1426 /* tx only */
1427 q_vector->eitr = adapter->tx_eitr_param;
1428 else if (q_vector->rxr_count)
1429 /* rx or mixed */
1430 q_vector->eitr = adapter->rx_eitr_param;
1431
1432 ixgbe_write_eitr(q_vector);
1433 /* If Flow Director is enabled, set interrupt affinity */
1434 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
1435 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)) {
1436 /*
1437 * Allocate the affinity_hint cpumask, assign the mask
1438 * for this vector, and set our affinity_hint for
1439 * this irq.
1440 */
1441 if (!alloc_cpumask_var(&q_vector->affinity_mask,
1442 GFP_KERNEL))
1443 return;
1444 cpumask_set_cpu(v_idx, q_vector->affinity_mask);
1445 irq_set_affinity_hint(adapter->msix_entries[v_idx].vector,
1446 q_vector->affinity_mask);
1447 }
1448 }
1449
1450 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
1451 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
1452 v_idx);
1453 else if (adapter->hw.mac.type == ixgbe_mac_82599EB)
1454 ixgbe_set_ivar(adapter, -1, 1, v_idx);
1455 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
1456
1457 /* set up to autoclear timer, and the vectors */
1458 mask = IXGBE_EIMS_ENABLE_MASK;
1459 if (adapter->num_vfs)
1460 mask &= ~(IXGBE_EIMS_OTHER |
1461 IXGBE_EIMS_MAILBOX |
1462 IXGBE_EIMS_LSC);
1463 else
1464 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
1465 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
1466 }
1467
1468 enum latency_range {
1469 lowest_latency = 0,
1470 low_latency = 1,
1471 bulk_latency = 2,
1472 latency_invalid = 255
1473 };
1474
1475 /**
1476 * ixgbe_update_itr - update the dynamic ITR value based on statistics
1477 * @adapter: pointer to adapter
1478 * @eitr: eitr setting (ints per sec) to give last timeslice
1479 * @itr_setting: current throttle rate in ints/second
1480 * @packets: the number of packets during this measurement interval
1481 * @bytes: the number of bytes during this measurement interval
1482 *
1483 * Stores a new ITR value based on packets and byte
1484 * counts during the last interrupt. The advantage of per interrupt
1485 * computation is faster updates and more accurate ITR for the current
1486 * traffic pattern. Constants in this function were computed
1487 * based on theoretical maximum wire speed and thresholds were set based
1488 * on testing data as well as attempting to minimize response time
1489 * while increasing bulk throughput.
1490 * this functionality is controlled by the InterruptThrottleRate module
1491 * parameter (see ixgbe_param.c)
1492 **/
1493 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
1494 u32 eitr, u8 itr_setting,
1495 int packets, int bytes)
1496 {
1497 unsigned int retval = itr_setting;
1498 u32 timepassed_us;
1499 u64 bytes_perint;
1500
1501 if (packets == 0)
1502 goto update_itr_done;
1503
1504
1505 /* simple throttlerate management
1506 * 0-20MB/s lowest (100000 ints/s)
1507 * 20-100MB/s low (20000 ints/s)
1508 * 100-1249MB/s bulk (8000 ints/s)
1509 */
1510 /* what was last interrupt timeslice? */
1511 timepassed_us = 1000000/eitr;
1512 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1513
1514 switch (itr_setting) {
1515 case lowest_latency:
1516 if (bytes_perint > adapter->eitr_low)
1517 retval = low_latency;
1518 break;
1519 case low_latency:
1520 if (bytes_perint > adapter->eitr_high)
1521 retval = bulk_latency;
1522 else if (bytes_perint <= adapter->eitr_low)
1523 retval = lowest_latency;
1524 break;
1525 case bulk_latency:
1526 if (bytes_perint <= adapter->eitr_high)
1527 retval = low_latency;
1528 break;
1529 }
1530
1531 update_itr_done:
1532 return retval;
1533 }
1534
1535 /**
1536 * ixgbe_write_eitr - write EITR register in hardware specific way
1537 * @q_vector: structure containing interrupt and ring information
1538 *
1539 * This function is made to be called by ethtool and by the driver
1540 * when it needs to update EITR registers at runtime. Hardware
1541 * specific quirks/differences are taken care of here.
1542 */
1543 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1544 {
1545 struct ixgbe_adapter *adapter = q_vector->adapter;
1546 struct ixgbe_hw *hw = &adapter->hw;
1547 int v_idx = q_vector->v_idx;
1548 u32 itr_reg = EITR_INTS_PER_SEC_TO_REG(q_vector->eitr);
1549
1550 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1551 /* must write high and low 16 bits to reset counter */
1552 itr_reg |= (itr_reg << 16);
1553 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1554 /*
1555 * 82599 can support a value of zero, so allow it for
1556 * max interrupt rate, but there is an errata where it can
1557 * not be zero with RSC
1558 */
1559 if (itr_reg == 8 &&
1560 !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
1561 itr_reg = 0;
1562
1563 /*
1564 * set the WDIS bit to not clear the timer bits and cause an
1565 * immediate assertion of the interrupt
1566 */
1567 itr_reg |= IXGBE_EITR_CNT_WDIS;
1568 }
1569 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1570 }
1571
1572 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
1573 {
1574 struct ixgbe_adapter *adapter = q_vector->adapter;
1575 u32 new_itr;
1576 u8 current_itr, ret_itr;
1577 int i, r_idx;
1578 struct ixgbe_ring *rx_ring, *tx_ring;
1579
1580 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1581 for (i = 0; i < q_vector->txr_count; i++) {
1582 tx_ring = adapter->tx_ring[r_idx];
1583 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1584 q_vector->tx_itr,
1585 tx_ring->total_packets,
1586 tx_ring->total_bytes);
1587 /* if the result for this queue would decrease interrupt
1588 * rate for this vector then use that result */
1589 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
1590 q_vector->tx_itr - 1 : ret_itr);
1591 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1592 r_idx + 1);
1593 }
1594
1595 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1596 for (i = 0; i < q_vector->rxr_count; i++) {
1597 rx_ring = adapter->rx_ring[r_idx];
1598 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1599 q_vector->rx_itr,
1600 rx_ring->total_packets,
1601 rx_ring->total_bytes);
1602 /* if the result for this queue would decrease interrupt
1603 * rate for this vector then use that result */
1604 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
1605 q_vector->rx_itr - 1 : ret_itr);
1606 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1607 r_idx + 1);
1608 }
1609
1610 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1611
1612 switch (current_itr) {
1613 /* counts and packets in update_itr are dependent on these numbers */
1614 case lowest_latency:
1615 new_itr = 100000;
1616 break;
1617 case low_latency:
1618 new_itr = 20000; /* aka hwitr = ~200 */
1619 break;
1620 case bulk_latency:
1621 default:
1622 new_itr = 8000;
1623 break;
1624 }
1625
1626 if (new_itr != q_vector->eitr) {
1627 /* do an exponential smoothing */
1628 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1629
1630 /* save the algorithm value here, not the smoothed one */
1631 q_vector->eitr = new_itr;
1632
1633 ixgbe_write_eitr(q_vector);
1634 }
1635 }
1636
1637 /**
1638 * ixgbe_check_overtemp_task - worker thread to check over tempurature
1639 * @work: pointer to work_struct containing our data
1640 **/
1641 static void ixgbe_check_overtemp_task(struct work_struct *work)
1642 {
1643 struct ixgbe_adapter *adapter = container_of(work,
1644 struct ixgbe_adapter,
1645 check_overtemp_task);
1646 struct ixgbe_hw *hw = &adapter->hw;
1647 u32 eicr = adapter->interrupt_event;
1648
1649 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE))
1650 return;
1651
1652 switch (hw->device_id) {
1653 case IXGBE_DEV_ID_82599_T3_LOM: {
1654 u32 autoneg;
1655 bool link_up = false;
1656
1657 if (hw->mac.ops.check_link)
1658 hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
1659
1660 if (((eicr & IXGBE_EICR_GPI_SDP0) && (!link_up)) ||
1661 (eicr & IXGBE_EICR_LSC))
1662 /* Check if this is due to overtemp */
1663 if (hw->phy.ops.check_overtemp(hw) == IXGBE_ERR_OVERTEMP)
1664 break;
1665 return;
1666 }
1667 default:
1668 if (!(eicr & IXGBE_EICR_GPI_SDP0))
1669 return;
1670 break;
1671 }
1672 e_crit(drv,
1673 "Network adapter has been stopped because it has over heated. "
1674 "Restart the computer. If the problem persists, "
1675 "power off the system and replace the adapter\n");
1676 /* write to clear the interrupt */
1677 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP0);
1678 }
1679
1680 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1681 {
1682 struct ixgbe_hw *hw = &adapter->hw;
1683
1684 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1685 (eicr & IXGBE_EICR_GPI_SDP1)) {
1686 e_crit(probe, "Fan has stopped, replace the adapter\n");
1687 /* write to clear the interrupt */
1688 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1689 }
1690 }
1691
1692 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1693 {
1694 struct ixgbe_hw *hw = &adapter->hw;
1695
1696 if (eicr & IXGBE_EICR_GPI_SDP1) {
1697 /* Clear the interrupt */
1698 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1699 schedule_work(&adapter->multispeed_fiber_task);
1700 } else if (eicr & IXGBE_EICR_GPI_SDP2) {
1701 /* Clear the interrupt */
1702 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1703 schedule_work(&adapter->sfp_config_module_task);
1704 } else {
1705 /* Interrupt isn't for us... */
1706 return;
1707 }
1708 }
1709
1710 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1711 {
1712 struct ixgbe_hw *hw = &adapter->hw;
1713
1714 adapter->lsc_int++;
1715 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1716 adapter->link_check_timeout = jiffies;
1717 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1718 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1719 IXGBE_WRITE_FLUSH(hw);
1720 schedule_work(&adapter->watchdog_task);
1721 }
1722 }
1723
1724 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1725 {
1726 struct net_device *netdev = data;
1727 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1728 struct ixgbe_hw *hw = &adapter->hw;
1729 u32 eicr;
1730
1731 /*
1732 * Workaround for Silicon errata. Use clear-by-write instead
1733 * of clear-by-read. Reading with EICS will return the
1734 * interrupt causes without clearing, which later be done
1735 * with the write to EICR.
1736 */
1737 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1738 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1739
1740 if (eicr & IXGBE_EICR_LSC)
1741 ixgbe_check_lsc(adapter);
1742
1743 if (eicr & IXGBE_EICR_MAILBOX)
1744 ixgbe_msg_task(adapter);
1745
1746 if (hw->mac.type == ixgbe_mac_82598EB)
1747 ixgbe_check_fan_failure(adapter, eicr);
1748
1749 if (hw->mac.type == ixgbe_mac_82599EB) {
1750 ixgbe_check_sfp_event(adapter, eicr);
1751 adapter->interrupt_event = eicr;
1752 if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
1753 ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)))
1754 schedule_work(&adapter->check_overtemp_task);
1755
1756 /* Handle Flow Director Full threshold interrupt */
1757 if (eicr & IXGBE_EICR_FLOW_DIR) {
1758 int i;
1759 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_FLOW_DIR);
1760 /* Disable transmits before FDIR Re-initialization */
1761 netif_tx_stop_all_queues(netdev);
1762 for (i = 0; i < adapter->num_tx_queues; i++) {
1763 struct ixgbe_ring *tx_ring =
1764 adapter->tx_ring[i];
1765 if (test_and_clear_bit(__IXGBE_FDIR_INIT_DONE,
1766 &tx_ring->reinit_state))
1767 schedule_work(&adapter->fdir_reinit_task);
1768 }
1769 }
1770 }
1771 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1772 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
1773
1774 return IRQ_HANDLED;
1775 }
1776
1777 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1778 u64 qmask)
1779 {
1780 u32 mask;
1781
1782 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1783 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1784 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1785 } else {
1786 mask = (qmask & 0xFFFFFFFF);
1787 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(0), mask);
1788 mask = (qmask >> 32);
1789 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(1), mask);
1790 }
1791 /* skip the flush */
1792 }
1793
1794 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1795 u64 qmask)
1796 {
1797 u32 mask;
1798
1799 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1800 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1801 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, mask);
1802 } else {
1803 mask = (qmask & 0xFFFFFFFF);
1804 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), mask);
1805 mask = (qmask >> 32);
1806 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), mask);
1807 }
1808 /* skip the flush */
1809 }
1810
1811 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
1812 {
1813 struct ixgbe_q_vector *q_vector = data;
1814 struct ixgbe_adapter *adapter = q_vector->adapter;
1815 struct ixgbe_ring *tx_ring;
1816 int i, r_idx;
1817
1818 if (!q_vector->txr_count)
1819 return IRQ_HANDLED;
1820
1821 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1822 for (i = 0; i < q_vector->txr_count; i++) {
1823 tx_ring = adapter->tx_ring[r_idx];
1824 tx_ring->total_bytes = 0;
1825 tx_ring->total_packets = 0;
1826 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1827 r_idx + 1);
1828 }
1829
1830 /* EIAM disabled interrupts (on this vector) for us */
1831 napi_schedule(&q_vector->napi);
1832
1833 return IRQ_HANDLED;
1834 }
1835
1836 /**
1837 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
1838 * @irq: unused
1839 * @data: pointer to our q_vector struct for this interrupt vector
1840 **/
1841 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
1842 {
1843 struct ixgbe_q_vector *q_vector = data;
1844 struct ixgbe_adapter *adapter = q_vector->adapter;
1845 struct ixgbe_ring *rx_ring;
1846 int r_idx;
1847 int i;
1848
1849 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1850 for (i = 0; i < q_vector->rxr_count; i++) {
1851 rx_ring = adapter->rx_ring[r_idx];
1852 rx_ring->total_bytes = 0;
1853 rx_ring->total_packets = 0;
1854 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1855 r_idx + 1);
1856 }
1857
1858 if (!q_vector->rxr_count)
1859 return IRQ_HANDLED;
1860
1861 /* disable interrupts on this vector only */
1862 /* EIAM disabled interrupts (on this vector) for us */
1863 napi_schedule(&q_vector->napi);
1864
1865 return IRQ_HANDLED;
1866 }
1867
1868 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1869 {
1870 struct ixgbe_q_vector *q_vector = data;
1871 struct ixgbe_adapter *adapter = q_vector->adapter;
1872 struct ixgbe_ring *ring;
1873 int r_idx;
1874 int i;
1875
1876 if (!q_vector->txr_count && !q_vector->rxr_count)
1877 return IRQ_HANDLED;
1878
1879 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1880 for (i = 0; i < q_vector->txr_count; i++) {
1881 ring = adapter->tx_ring[r_idx];
1882 ring->total_bytes = 0;
1883 ring->total_packets = 0;
1884 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1885 r_idx + 1);
1886 }
1887
1888 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1889 for (i = 0; i < q_vector->rxr_count; i++) {
1890 ring = adapter->rx_ring[r_idx];
1891 ring->total_bytes = 0;
1892 ring->total_packets = 0;
1893 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1894 r_idx + 1);
1895 }
1896
1897 /* EIAM disabled interrupts (on this vector) for us */
1898 napi_schedule(&q_vector->napi);
1899
1900 return IRQ_HANDLED;
1901 }
1902
1903 /**
1904 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1905 * @napi: napi struct with our devices info in it
1906 * @budget: amount of work driver is allowed to do this pass, in packets
1907 *
1908 * This function is optimized for cleaning one queue only on a single
1909 * q_vector!!!
1910 **/
1911 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1912 {
1913 struct ixgbe_q_vector *q_vector =
1914 container_of(napi, struct ixgbe_q_vector, napi);
1915 struct ixgbe_adapter *adapter = q_vector->adapter;
1916 struct ixgbe_ring *rx_ring = NULL;
1917 int work_done = 0;
1918 long r_idx;
1919
1920 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1921 rx_ring = adapter->rx_ring[r_idx];
1922 #ifdef CONFIG_IXGBE_DCA
1923 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1924 ixgbe_update_rx_dca(adapter, rx_ring);
1925 #endif
1926
1927 ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
1928
1929 /* If all Rx work done, exit the polling mode */
1930 if (work_done < budget) {
1931 napi_complete(napi);
1932 if (adapter->rx_itr_setting & 1)
1933 ixgbe_set_itr_msix(q_vector);
1934 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1935 ixgbe_irq_enable_queues(adapter,
1936 ((u64)1 << q_vector->v_idx));
1937 }
1938
1939 return work_done;
1940 }
1941
1942 /**
1943 * ixgbe_clean_rxtx_many - msix (aka one shot) rx clean routine
1944 * @napi: napi struct with our devices info in it
1945 * @budget: amount of work driver is allowed to do this pass, in packets
1946 *
1947 * This function will clean more than one rx queue associated with a
1948 * q_vector.
1949 **/
1950 static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
1951 {
1952 struct ixgbe_q_vector *q_vector =
1953 container_of(napi, struct ixgbe_q_vector, napi);
1954 struct ixgbe_adapter *adapter = q_vector->adapter;
1955 struct ixgbe_ring *ring = NULL;
1956 int work_done = 0, i;
1957 long r_idx;
1958 bool tx_clean_complete = true;
1959
1960 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1961 for (i = 0; i < q_vector->txr_count; i++) {
1962 ring = adapter->tx_ring[r_idx];
1963 #ifdef CONFIG_IXGBE_DCA
1964 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1965 ixgbe_update_tx_dca(adapter, ring);
1966 #endif
1967 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
1968 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1969 r_idx + 1);
1970 }
1971
1972 /* attempt to distribute budget to each queue fairly, but don't allow
1973 * the budget to go below 1 because we'll exit polling */
1974 budget /= (q_vector->rxr_count ?: 1);
1975 budget = max(budget, 1);
1976 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1977 for (i = 0; i < q_vector->rxr_count; i++) {
1978 ring = adapter->rx_ring[r_idx];
1979 #ifdef CONFIG_IXGBE_DCA
1980 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1981 ixgbe_update_rx_dca(adapter, ring);
1982 #endif
1983 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
1984 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1985 r_idx + 1);
1986 }
1987
1988 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1989 ring = adapter->rx_ring[r_idx];
1990 /* If all Rx work done, exit the polling mode */
1991 if (work_done < budget) {
1992 napi_complete(napi);
1993 if (adapter->rx_itr_setting & 1)
1994 ixgbe_set_itr_msix(q_vector);
1995 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1996 ixgbe_irq_enable_queues(adapter,
1997 ((u64)1 << q_vector->v_idx));
1998 return 0;
1999 }
2000
2001 return work_done;
2002 }
2003
2004 /**
2005 * ixgbe_clean_txonly - msix (aka one shot) tx clean routine
2006 * @napi: napi struct with our devices info in it
2007 * @budget: amount of work driver is allowed to do this pass, in packets
2008 *
2009 * This function is optimized for cleaning one queue only on a single
2010 * q_vector!!!
2011 **/
2012 static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
2013 {
2014 struct ixgbe_q_vector *q_vector =
2015 container_of(napi, struct ixgbe_q_vector, napi);
2016 struct ixgbe_adapter *adapter = q_vector->adapter;
2017 struct ixgbe_ring *tx_ring = NULL;
2018 int work_done = 0;
2019 long r_idx;
2020
2021 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
2022 tx_ring = adapter->tx_ring[r_idx];
2023 #ifdef CONFIG_IXGBE_DCA
2024 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2025 ixgbe_update_tx_dca(adapter, tx_ring);
2026 #endif
2027
2028 if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
2029 work_done = budget;
2030
2031 /* If all Tx work done, exit the polling mode */
2032 if (work_done < budget) {
2033 napi_complete(napi);
2034 if (adapter->tx_itr_setting & 1)
2035 ixgbe_set_itr_msix(q_vector);
2036 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2037 ixgbe_irq_enable_queues(adapter,
2038 ((u64)1 << q_vector->v_idx));
2039 }
2040
2041 return work_done;
2042 }
2043
2044 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
2045 int r_idx)
2046 {
2047 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2048
2049 set_bit(r_idx, q_vector->rxr_idx);
2050 q_vector->rxr_count++;
2051 }
2052
2053 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
2054 int t_idx)
2055 {
2056 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2057
2058 set_bit(t_idx, q_vector->txr_idx);
2059 q_vector->txr_count++;
2060 }
2061
2062 /**
2063 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
2064 * @adapter: board private structure to initialize
2065 * @vectors: allotted vector count for descriptor rings
2066 *
2067 * This function maps descriptor rings to the queue-specific vectors
2068 * we were allotted through the MSI-X enabling code. Ideally, we'd have
2069 * one vector per ring/queue, but on a constrained vector budget, we
2070 * group the rings as "efficiently" as possible. You would add new
2071 * mapping configurations in here.
2072 **/
2073 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
2074 int vectors)
2075 {
2076 int v_start = 0;
2077 int rxr_idx = 0, txr_idx = 0;
2078 int rxr_remaining = adapter->num_rx_queues;
2079 int txr_remaining = adapter->num_tx_queues;
2080 int i, j;
2081 int rqpv, tqpv;
2082 int err = 0;
2083
2084 /* No mapping required if MSI-X is disabled. */
2085 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2086 goto out;
2087
2088 /*
2089 * The ideal configuration...
2090 * We have enough vectors to map one per queue.
2091 */
2092 if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
2093 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
2094 map_vector_to_rxq(adapter, v_start, rxr_idx);
2095
2096 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
2097 map_vector_to_txq(adapter, v_start, txr_idx);
2098
2099 goto out;
2100 }
2101
2102 /*
2103 * If we don't have enough vectors for a 1-to-1
2104 * mapping, we'll have to group them so there are
2105 * multiple queues per vector.
2106 */
2107 /* Re-adjusting *qpv takes care of the remainder. */
2108 for (i = v_start; i < vectors; i++) {
2109 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
2110 for (j = 0; j < rqpv; j++) {
2111 map_vector_to_rxq(adapter, i, rxr_idx);
2112 rxr_idx++;
2113 rxr_remaining--;
2114 }
2115 }
2116 for (i = v_start; i < vectors; i++) {
2117 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
2118 for (j = 0; j < tqpv; j++) {
2119 map_vector_to_txq(adapter, i, txr_idx);
2120 txr_idx++;
2121 txr_remaining--;
2122 }
2123 }
2124
2125 out:
2126 return err;
2127 }
2128
2129 /**
2130 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2131 * @adapter: board private structure
2132 *
2133 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2134 * interrupts from the kernel.
2135 **/
2136 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2137 {
2138 struct net_device *netdev = adapter->netdev;
2139 irqreturn_t (*handler)(int, void *);
2140 int i, vector, q_vectors, err;
2141 int ri = 0, ti = 0;
2142
2143 /* Decrement for Other and TCP Timer vectors */
2144 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2145
2146 /* Map the Tx/Rx rings to the vectors we were allotted. */
2147 err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
2148 if (err)
2149 goto out;
2150
2151 #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
2152 (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
2153 &ixgbe_msix_clean_many)
2154 for (vector = 0; vector < q_vectors; vector++) {
2155 handler = SET_HANDLER(adapter->q_vector[vector]);
2156
2157 if (handler == &ixgbe_msix_clean_rx) {
2158 sprintf(adapter->name[vector], "%s-%s-%d",
2159 netdev->name, "rx", ri++);
2160 } else if (handler == &ixgbe_msix_clean_tx) {
2161 sprintf(adapter->name[vector], "%s-%s-%d",
2162 netdev->name, "tx", ti++);
2163 } else
2164 sprintf(adapter->name[vector], "%s-%s-%d",
2165 netdev->name, "TxRx", vector);
2166
2167 err = request_irq(adapter->msix_entries[vector].vector,
2168 handler, 0, adapter->name[vector],
2169 adapter->q_vector[vector]);
2170 if (err) {
2171 e_err(probe, "request_irq failed for MSIX interrupt "
2172 "Error: %d\n", err);
2173 goto free_queue_irqs;
2174 }
2175 }
2176
2177 sprintf(adapter->name[vector], "%s:lsc", netdev->name);
2178 err = request_irq(adapter->msix_entries[vector].vector,
2179 ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
2180 if (err) {
2181 e_err(probe, "request_irq for msix_lsc failed: %d\n", err);
2182 goto free_queue_irqs;
2183 }
2184
2185 return 0;
2186
2187 free_queue_irqs:
2188 for (i = vector - 1; i >= 0; i--)
2189 free_irq(adapter->msix_entries[--vector].vector,
2190 adapter->q_vector[i]);
2191 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2192 pci_disable_msix(adapter->pdev);
2193 kfree(adapter->msix_entries);
2194 adapter->msix_entries = NULL;
2195 out:
2196 return err;
2197 }
2198
2199 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
2200 {
2201 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2202 u8 current_itr;
2203 u32 new_itr = q_vector->eitr;
2204 struct ixgbe_ring *rx_ring = adapter->rx_ring[0];
2205 struct ixgbe_ring *tx_ring = adapter->tx_ring[0];
2206
2207 q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
2208 q_vector->tx_itr,
2209 tx_ring->total_packets,
2210 tx_ring->total_bytes);
2211 q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
2212 q_vector->rx_itr,
2213 rx_ring->total_packets,
2214 rx_ring->total_bytes);
2215
2216 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
2217
2218 switch (current_itr) {
2219 /* counts and packets in update_itr are dependent on these numbers */
2220 case lowest_latency:
2221 new_itr = 100000;
2222 break;
2223 case low_latency:
2224 new_itr = 20000; /* aka hwitr = ~200 */
2225 break;
2226 case bulk_latency:
2227 new_itr = 8000;
2228 break;
2229 default:
2230 break;
2231 }
2232
2233 if (new_itr != q_vector->eitr) {
2234 /* do an exponential smoothing */
2235 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
2236
2237 /* save the algorithm value here, not the smoothed one */
2238 q_vector->eitr = new_itr;
2239
2240 ixgbe_write_eitr(q_vector);
2241 }
2242 }
2243
2244 /**
2245 * ixgbe_irq_enable - Enable default interrupt generation settings
2246 * @adapter: board private structure
2247 **/
2248 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
2249 bool flush)
2250 {
2251 u32 mask;
2252
2253 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
2254 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
2255 mask |= IXGBE_EIMS_GPI_SDP0;
2256 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
2257 mask |= IXGBE_EIMS_GPI_SDP1;
2258 if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
2259 mask |= IXGBE_EIMS_ECC;
2260 mask |= IXGBE_EIMS_GPI_SDP1;
2261 mask |= IXGBE_EIMS_GPI_SDP2;
2262 if (adapter->num_vfs)
2263 mask |= IXGBE_EIMS_MAILBOX;
2264 }
2265 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
2266 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
2267 mask |= IXGBE_EIMS_FLOW_DIR;
2268
2269 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
2270 if (queues)
2271 ixgbe_irq_enable_queues(adapter, ~0);
2272 if (flush)
2273 IXGBE_WRITE_FLUSH(&adapter->hw);
2274
2275 if (adapter->num_vfs > 32) {
2276 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
2277 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
2278 }
2279 }
2280
2281 /**
2282 * ixgbe_intr - legacy mode Interrupt Handler
2283 * @irq: interrupt number
2284 * @data: pointer to a network interface device structure
2285 **/
2286 static irqreturn_t ixgbe_intr(int irq, void *data)
2287 {
2288 struct net_device *netdev = data;
2289 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2290 struct ixgbe_hw *hw = &adapter->hw;
2291 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2292 u32 eicr;
2293
2294 /*
2295 * Workaround for silicon errata on 82598. Mask the interrupts
2296 * before the read of EICR.
2297 */
2298 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2299
2300 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2301 * therefore no explict interrupt disable is necessary */
2302 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2303 if (!eicr) {
2304 /*
2305 * shared interrupt alert!
2306 * make sure interrupts are enabled because the read will
2307 * have disabled interrupts due to EIAM
2308 * finish the workaround of silicon errata on 82598. Unmask
2309 * the interrupt that we masked before the EICR read.
2310 */
2311 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2312 ixgbe_irq_enable(adapter, true, true);
2313 return IRQ_NONE; /* Not our interrupt */
2314 }
2315
2316 if (eicr & IXGBE_EICR_LSC)
2317 ixgbe_check_lsc(adapter);
2318
2319 if (hw->mac.type == ixgbe_mac_82599EB)
2320 ixgbe_check_sfp_event(adapter, eicr);
2321
2322 ixgbe_check_fan_failure(adapter, eicr);
2323 if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
2324 ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)))
2325 schedule_work(&adapter->check_overtemp_task);
2326
2327 if (napi_schedule_prep(&(q_vector->napi))) {
2328 adapter->tx_ring[0]->total_packets = 0;
2329 adapter->tx_ring[0]->total_bytes = 0;
2330 adapter->rx_ring[0]->total_packets = 0;
2331 adapter->rx_ring[0]->total_bytes = 0;
2332 /* would disable interrupts here but EIAM disabled it */
2333 __napi_schedule(&(q_vector->napi));
2334 }
2335
2336 /*
2337 * re-enable link(maybe) and non-queue interrupts, no flush.
2338 * ixgbe_poll will re-enable the queue interrupts
2339 */
2340
2341 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2342 ixgbe_irq_enable(adapter, false, false);
2343
2344 return IRQ_HANDLED;
2345 }
2346
2347 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
2348 {
2349 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2350
2351 for (i = 0; i < q_vectors; i++) {
2352 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
2353 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
2354 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
2355 q_vector->rxr_count = 0;
2356 q_vector->txr_count = 0;
2357 }
2358 }
2359
2360 /**
2361 * ixgbe_request_irq - initialize interrupts
2362 * @adapter: board private structure
2363 *
2364 * Attempts to configure interrupts using the best available
2365 * capabilities of the hardware and kernel.
2366 **/
2367 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
2368 {
2369 struct net_device *netdev = adapter->netdev;
2370 int err;
2371
2372 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2373 err = ixgbe_request_msix_irqs(adapter);
2374 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
2375 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
2376 netdev->name, netdev);
2377 } else {
2378 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
2379 netdev->name, netdev);
2380 }
2381
2382 if (err)
2383 e_err(probe, "request_irq failed, Error %d\n", err);
2384
2385 return err;
2386 }
2387
2388 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
2389 {
2390 struct net_device *netdev = adapter->netdev;
2391
2392 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2393 int i, q_vectors;
2394
2395 q_vectors = adapter->num_msix_vectors;
2396
2397 i = q_vectors - 1;
2398 free_irq(adapter->msix_entries[i].vector, netdev);
2399
2400 i--;
2401 for (; i >= 0; i--) {
2402 free_irq(adapter->msix_entries[i].vector,
2403 adapter->q_vector[i]);
2404 }
2405
2406 ixgbe_reset_q_vectors(adapter);
2407 } else {
2408 free_irq(adapter->pdev->irq, netdev);
2409 }
2410 }
2411
2412 /**
2413 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
2414 * @adapter: board private structure
2415 **/
2416 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
2417 {
2418 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2419 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
2420 } else {
2421 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
2422 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
2423 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
2424 if (adapter->num_vfs > 32)
2425 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
2426 }
2427 IXGBE_WRITE_FLUSH(&adapter->hw);
2428 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2429 int i;
2430 for (i = 0; i < adapter->num_msix_vectors; i++)
2431 synchronize_irq(adapter->msix_entries[i].vector);
2432 } else {
2433 synchronize_irq(adapter->pdev->irq);
2434 }
2435 }
2436
2437 /**
2438 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
2439 *
2440 **/
2441 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
2442 {
2443 struct ixgbe_hw *hw = &adapter->hw;
2444
2445 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
2446 EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr_param));
2447
2448 ixgbe_set_ivar(adapter, 0, 0, 0);
2449 ixgbe_set_ivar(adapter, 1, 0, 0);
2450
2451 map_vector_to_rxq(adapter, 0, 0);
2452 map_vector_to_txq(adapter, 0, 0);
2453
2454 e_info(hw, "Legacy interrupt IVAR setup done\n");
2455 }
2456
2457 /**
2458 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
2459 * @adapter: board private structure
2460 * @ring: structure containing ring specific data
2461 *
2462 * Configure the Tx descriptor ring after a reset.
2463 **/
2464 void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
2465 struct ixgbe_ring *ring)
2466 {
2467 struct ixgbe_hw *hw = &adapter->hw;
2468 u64 tdba = ring->dma;
2469 int wait_loop = 10;
2470 u32 txdctl;
2471 u16 reg_idx = ring->reg_idx;
2472
2473 /* disable queue to avoid issues while updating state */
2474 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2475 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx),
2476 txdctl & ~IXGBE_TXDCTL_ENABLE);
2477 IXGBE_WRITE_FLUSH(hw);
2478
2479 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
2480 (tdba & DMA_BIT_MASK(32)));
2481 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
2482 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
2483 ring->count * sizeof(union ixgbe_adv_tx_desc));
2484 IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
2485 IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
2486 ring->head = IXGBE_TDH(reg_idx);
2487 ring->tail = IXGBE_TDT(reg_idx);
2488
2489 /* configure fetching thresholds */
2490 if (adapter->rx_itr_setting == 0) {
2491 /* cannot set wthresh when itr==0 */
2492 txdctl &= ~0x007F0000;
2493 } else {
2494 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
2495 txdctl |= (8 << 16);
2496 }
2497 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2498 /* PThresh workaround for Tx hang with DFP enabled. */
2499 txdctl |= 32;
2500 }
2501
2502 /* reinitialize flowdirector state */
2503 set_bit(__IXGBE_FDIR_INIT_DONE, &ring->reinit_state);
2504
2505 /* enable queue */
2506 txdctl |= IXGBE_TXDCTL_ENABLE;
2507 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
2508
2509 /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2510 if (hw->mac.type == ixgbe_mac_82598EB &&
2511 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2512 return;
2513
2514 /* poll to verify queue is enabled */
2515 do {
2516 msleep(1);
2517 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2518 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
2519 if (!wait_loop)
2520 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx);
2521 }
2522
2523 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
2524 {
2525 struct ixgbe_hw *hw = &adapter->hw;
2526 u32 rttdcs;
2527 u32 mask;
2528
2529 if (hw->mac.type == ixgbe_mac_82598EB)
2530 return;
2531
2532 /* disable the arbiter while setting MTQC */
2533 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
2534 rttdcs |= IXGBE_RTTDCS_ARBDIS;
2535 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2536
2537 /* set transmit pool layout */
2538 mask = (IXGBE_FLAG_SRIOV_ENABLED | IXGBE_FLAG_DCB_ENABLED);
2539 switch (adapter->flags & mask) {
2540
2541 case (IXGBE_FLAG_SRIOV_ENABLED):
2542 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2543 (IXGBE_MTQC_VT_ENA | IXGBE_MTQC_64VF));
2544 break;
2545
2546 case (IXGBE_FLAG_DCB_ENABLED):
2547 /* We enable 8 traffic classes, DCB only */
2548 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2549 (IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ));
2550 break;
2551
2552 default:
2553 IXGBE_WRITE_REG(hw, IXGBE_MTQC, IXGBE_MTQC_64Q_1PB);
2554 break;
2555 }
2556
2557 /* re-enable the arbiter */
2558 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
2559 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2560 }
2561
2562 /**
2563 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
2564 * @adapter: board private structure
2565 *
2566 * Configure the Tx unit of the MAC after a reset.
2567 **/
2568 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
2569 {
2570 struct ixgbe_hw *hw = &adapter->hw;
2571 u32 dmatxctl;
2572 u32 i;
2573
2574 ixgbe_setup_mtqc(adapter);
2575
2576 if (hw->mac.type != ixgbe_mac_82598EB) {
2577 /* DMATXCTL.EN must be before Tx queues are enabled */
2578 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2579 dmatxctl |= IXGBE_DMATXCTL_TE;
2580 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2581 }
2582
2583 /* Setup the HW Tx Head and Tail descriptor pointers */
2584 for (i = 0; i < adapter->num_tx_queues; i++)
2585 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
2586 }
2587
2588 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
2589
2590 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
2591 struct ixgbe_ring *rx_ring)
2592 {
2593 u32 srrctl;
2594 int index;
2595 struct ixgbe_ring_feature *feature = adapter->ring_feature;
2596
2597 index = rx_ring->reg_idx;
2598 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2599 unsigned long mask;
2600 mask = (unsigned long) feature[RING_F_RSS].mask;
2601 index = index & mask;
2602 }
2603 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
2604
2605 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
2606 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
2607 if (adapter->num_vfs)
2608 srrctl |= IXGBE_SRRCTL_DROP_EN;
2609
2610 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
2611 IXGBE_SRRCTL_BSIZEHDR_MASK;
2612
2613 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2614 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
2615 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2616 #else
2617 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2618 #endif
2619 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
2620 } else {
2621 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
2622 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2623 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
2624 }
2625
2626 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
2627 }
2628
2629 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
2630 {
2631 struct ixgbe_hw *hw = &adapter->hw;
2632 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2633 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2634 0x6A3E67EA, 0x14364D17, 0x3BED200D};
2635 u32 mrqc = 0, reta = 0;
2636 u32 rxcsum;
2637 int i, j;
2638 int mask;
2639
2640 /* Fill out hash function seeds */
2641 for (i = 0; i < 10; i++)
2642 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2643
2644 /* Fill out redirection table */
2645 for (i = 0, j = 0; i < 128; i++, j++) {
2646 if (j == adapter->ring_feature[RING_F_RSS].indices)
2647 j = 0;
2648 /* reta = 4-byte sliding window of
2649 * 0x00..(indices-1)(indices-1)00..etc. */
2650 reta = (reta << 8) | (j * 0x11);
2651 if ((i & 3) == 3)
2652 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2653 }
2654
2655 /* Disable indicating checksum in descriptor, enables RSS hash */
2656 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2657 rxcsum |= IXGBE_RXCSUM_PCSD;
2658 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2659
2660 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
2661 mask = adapter->flags & IXGBE_FLAG_RSS_ENABLED;
2662 else
2663 mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
2664 #ifdef CONFIG_IXGBE_DCB
2665 | IXGBE_FLAG_DCB_ENABLED
2666 #endif
2667 | IXGBE_FLAG_SRIOV_ENABLED
2668 );
2669
2670 switch (mask) {
2671 case (IXGBE_FLAG_RSS_ENABLED):
2672 mrqc = IXGBE_MRQC_RSSEN;
2673 break;
2674 case (IXGBE_FLAG_SRIOV_ENABLED):
2675 mrqc = IXGBE_MRQC_VMDQEN;
2676 break;
2677 #ifdef CONFIG_IXGBE_DCB
2678 case (IXGBE_FLAG_DCB_ENABLED):
2679 mrqc = IXGBE_MRQC_RT8TCEN;
2680 break;
2681 #endif /* CONFIG_IXGBE_DCB */
2682 default:
2683 break;
2684 }
2685
2686 /* Perform hash on these packet types */
2687 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2688 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2689 | IXGBE_MRQC_RSS_FIELD_IPV6
2690 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
2691
2692 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2693 }
2694
2695 /**
2696 * ixgbe_configure_rscctl - enable RSC for the indicated ring
2697 * @adapter: address of board private structure
2698 * @index: index of ring to set
2699 **/
2700 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
2701 struct ixgbe_ring *ring)
2702 {
2703 struct ixgbe_hw *hw = &adapter->hw;
2704 u32 rscctrl;
2705 int rx_buf_len;
2706 u16 reg_idx = ring->reg_idx;
2707
2708 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
2709 return;
2710
2711 rx_buf_len = ring->rx_buf_len;
2712 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
2713 rscctrl |= IXGBE_RSCCTL_RSCEN;
2714 /*
2715 * we must limit the number of descriptors so that the
2716 * total size of max desc * buf_len is not greater
2717 * than 65535
2718 */
2719 if (ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2720 #if (MAX_SKB_FRAGS > 16)
2721 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2722 #elif (MAX_SKB_FRAGS > 8)
2723 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2724 #elif (MAX_SKB_FRAGS > 4)
2725 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2726 #else
2727 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2728 #endif
2729 } else {
2730 if (rx_buf_len < IXGBE_RXBUFFER_4096)
2731 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2732 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
2733 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2734 else
2735 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2736 }
2737 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
2738 }
2739
2740 /**
2741 * ixgbe_set_uta - Set unicast filter table address
2742 * @adapter: board private structure
2743 *
2744 * The unicast table address is a register array of 32-bit registers.
2745 * The table is meant to be used in a way similar to how the MTA is used
2746 * however due to certain limitations in the hardware it is necessary to
2747 * set all the hash bits to 1 and use the VMOLR ROPE bit as a promiscuous
2748 * enable bit to allow vlan tag stripping when promiscuous mode is enabled
2749 **/
2750 static void ixgbe_set_uta(struct ixgbe_adapter *adapter)
2751 {
2752 struct ixgbe_hw *hw = &adapter->hw;
2753 int i;
2754
2755 /* The UTA table only exists on 82599 hardware and newer */
2756 if (hw->mac.type < ixgbe_mac_82599EB)
2757 return;
2758
2759 /* we only need to do this if VMDq is enabled */
2760 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
2761 return;
2762
2763 for (i = 0; i < 128; i++)
2764 IXGBE_WRITE_REG(hw, IXGBE_UTA(i), ~0);
2765 }
2766
2767 #define IXGBE_MAX_RX_DESC_POLL 10
2768 static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
2769 struct ixgbe_ring *ring)
2770 {
2771 struct ixgbe_hw *hw = &adapter->hw;
2772 int reg_idx = ring->reg_idx;
2773 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
2774 u32 rxdctl;
2775
2776 /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2777 if (hw->mac.type == ixgbe_mac_82598EB &&
2778 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2779 return;
2780
2781 do {
2782 msleep(1);
2783 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2784 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
2785
2786 if (!wait_loop) {
2787 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
2788 "the polling period\n", reg_idx);
2789 }
2790 }
2791
2792 void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
2793 struct ixgbe_ring *ring)
2794 {
2795 struct ixgbe_hw *hw = &adapter->hw;
2796 u64 rdba = ring->dma;
2797 u32 rxdctl;
2798 u16 reg_idx = ring->reg_idx;
2799
2800 /* disable queue to avoid issues while updating state */
2801 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2802 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx),
2803 rxdctl & ~IXGBE_RXDCTL_ENABLE);
2804 IXGBE_WRITE_FLUSH(hw);
2805
2806 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
2807 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
2808 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
2809 ring->count * sizeof(union ixgbe_adv_rx_desc));
2810 IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
2811 IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
2812 ring->head = IXGBE_RDH(reg_idx);
2813 ring->tail = IXGBE_RDT(reg_idx);
2814
2815 ixgbe_configure_srrctl(adapter, ring);
2816 ixgbe_configure_rscctl(adapter, ring);
2817
2818 if (hw->mac.type == ixgbe_mac_82598EB) {
2819 /*
2820 * enable cache line friendly hardware writes:
2821 * PTHRESH=32 descriptors (half the internal cache),
2822 * this also removes ugly rx_no_buffer_count increment
2823 * HTHRESH=4 descriptors (to minimize latency on fetch)
2824 * WTHRESH=8 burst writeback up to two cache lines
2825 */
2826 rxdctl &= ~0x3FFFFF;
2827 rxdctl |= 0x080420;
2828 }
2829
2830 /* enable receive descriptor ring */
2831 rxdctl |= IXGBE_RXDCTL_ENABLE;
2832 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
2833
2834 ixgbe_rx_desc_queue_enable(adapter, ring);
2835 ixgbe_alloc_rx_buffers(adapter, ring, IXGBE_DESC_UNUSED(ring));
2836 }
2837
2838 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
2839 {
2840 struct ixgbe_hw *hw = &adapter->hw;
2841 int p;
2842
2843 /* PSRTYPE must be initialized in non 82598 adapters */
2844 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
2845 IXGBE_PSRTYPE_UDPHDR |
2846 IXGBE_PSRTYPE_IPV4HDR |
2847 IXGBE_PSRTYPE_L2HDR |
2848 IXGBE_PSRTYPE_IPV6HDR;
2849
2850 if (hw->mac.type == ixgbe_mac_82598EB)
2851 return;
2852
2853 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED)
2854 psrtype |= (adapter->num_rx_queues_per_pool << 29);
2855
2856 for (p = 0; p < adapter->num_rx_pools; p++)
2857 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(adapter->num_vfs + p),
2858 psrtype);
2859 }
2860
2861 static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
2862 {
2863 struct ixgbe_hw *hw = &adapter->hw;
2864 u32 gcr_ext;
2865 u32 vt_reg_bits;
2866 u32 reg_offset, vf_shift;
2867 u32 vmdctl;
2868
2869 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
2870 return;
2871
2872 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
2873 vt_reg_bits = IXGBE_VMD_CTL_VMDQ_EN | IXGBE_VT_CTL_REPLEN;
2874 vt_reg_bits |= (adapter->num_vfs << IXGBE_VT_CTL_POOL_SHIFT);
2875 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl | vt_reg_bits);
2876
2877 vf_shift = adapter->num_vfs % 32;
2878 reg_offset = (adapter->num_vfs > 32) ? 1 : 0;
2879
2880 /* Enable only the PF's pool for Tx/Rx */
2881 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (1 << vf_shift));
2882 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), 0);
2883 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (1 << vf_shift));
2884 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), 0);
2885 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
2886
2887 /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
2888 hw->mac.ops.set_vmdq(hw, 0, adapter->num_vfs);
2889
2890 /*
2891 * Set up VF register offsets for selected VT Mode,
2892 * i.e. 32 or 64 VFs for SR-IOV
2893 */
2894 gcr_ext = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
2895 gcr_ext |= IXGBE_GCR_EXT_MSIX_EN;
2896 gcr_ext |= IXGBE_GCR_EXT_VT_MODE_64;
2897 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
2898
2899 /* enable Tx loopback for VF/PF communication */
2900 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
2901 }
2902
2903 static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
2904 {
2905 struct ixgbe_hw *hw = &adapter->hw;
2906 struct net_device *netdev = adapter->netdev;
2907 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2908 int rx_buf_len;
2909 struct ixgbe_ring *rx_ring;
2910 int i;
2911 u32 mhadd, hlreg0;
2912
2913 /* Decide whether to use packet split mode or not */
2914 /* Do not use packet split if we're in SR-IOV Mode */
2915 if (!adapter->num_vfs)
2916 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
2917
2918 /* Set the RX buffer length according to the mode */
2919 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
2920 rx_buf_len = IXGBE_RX_HDR_SIZE;
2921 } else {
2922 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
2923 (netdev->mtu <= ETH_DATA_LEN))
2924 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
2925 else
2926 rx_buf_len = ALIGN(max_frame + VLAN_HLEN, 1024);
2927 }
2928
2929 #ifdef IXGBE_FCOE
2930 /* adjust max frame to be able to do baby jumbo for FCoE */
2931 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
2932 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
2933 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
2934
2935 #endif /* IXGBE_FCOE */
2936 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
2937 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
2938 mhadd &= ~IXGBE_MHADD_MFS_MASK;
2939 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
2940
2941 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
2942 }
2943
2944 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
2945 /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
2946 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2947 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
2948
2949 /*
2950 * Setup the HW Rx Head and Tail Descriptor Pointers and
2951 * the Base and Length of the Rx Descriptor Ring
2952 */
2953 for (i = 0; i < adapter->num_rx_queues; i++) {
2954 rx_ring = adapter->rx_ring[i];
2955 rx_ring->rx_buf_len = rx_buf_len;
2956
2957 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
2958 rx_ring->flags |= IXGBE_RING_RX_PS_ENABLED;
2959 else
2960 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2961
2962 #ifdef IXGBE_FCOE
2963 if (netdev->features & NETIF_F_FCOE_MTU) {
2964 struct ixgbe_ring_feature *f;
2965 f = &adapter->ring_feature[RING_F_FCOE];
2966 if ((i >= f->mask) && (i < f->mask + f->indices)) {
2967 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2968 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
2969 rx_ring->rx_buf_len =
2970 IXGBE_FCOE_JUMBO_FRAME_SIZE;
2971 }
2972 }
2973 #endif /* IXGBE_FCOE */
2974 }
2975
2976 }
2977
2978 static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
2979 {
2980 struct ixgbe_hw *hw = &adapter->hw;
2981 u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2982
2983 switch (hw->mac.type) {
2984 case ixgbe_mac_82598EB:
2985 /*
2986 * For VMDq support of different descriptor types or
2987 * buffer sizes through the use of multiple SRRCTL
2988 * registers, RDRXCTL.MVMEN must be set to 1
2989 *
2990 * also, the manual doesn't mention it clearly but DCA hints
2991 * will only use queue 0's tags unless this bit is set. Side
2992 * effects of setting this bit are only that SRRCTL must be
2993 * fully programmed [0..15]
2994 */
2995 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
2996 break;
2997 case ixgbe_mac_82599EB:
2998 /* Disable RSC for ACK packets */
2999 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
3000 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
3001 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
3002 /* hardware requires some bits to be set by default */
3003 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
3004 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
3005 break;
3006 default:
3007 /* We should do nothing since we don't know this hardware */
3008 return;
3009 }
3010
3011 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
3012 }
3013
3014 /**
3015 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
3016 * @adapter: board private structure
3017 *
3018 * Configure the Rx unit of the MAC after a reset.
3019 **/
3020 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
3021 {
3022 struct ixgbe_hw *hw = &adapter->hw;
3023 int i;
3024 u32 rxctrl;
3025
3026 /* disable receives while setting up the descriptors */
3027 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3028 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3029
3030 ixgbe_setup_psrtype(adapter);
3031 ixgbe_setup_rdrxctl(adapter);
3032
3033 /* Program registers for the distribution of queues */
3034 ixgbe_setup_mrqc(adapter);
3035
3036 ixgbe_set_uta(adapter);
3037
3038 /* set_rx_buffer_len must be called before ring initialization */
3039 ixgbe_set_rx_buffer_len(adapter);
3040
3041 /*
3042 * Setup the HW Rx Head and Tail Descriptor Pointers and
3043 * the Base and Length of the Rx Descriptor Ring
3044 */
3045 for (i = 0; i < adapter->num_rx_queues; i++)
3046 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
3047
3048 /* disable drop enable for 82598 parts */
3049 if (hw->mac.type == ixgbe_mac_82598EB)
3050 rxctrl |= IXGBE_RXCTRL_DMBYPS;
3051
3052 /* enable all receives */
3053 rxctrl |= IXGBE_RXCTRL_RXEN;
3054 hw->mac.ops.enable_rx_dma(hw, rxctrl);
3055 }
3056
3057 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
3058 {
3059 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3060 struct ixgbe_hw *hw = &adapter->hw;
3061 int pool_ndx = adapter->num_vfs;
3062
3063 /* add VID to filter table */
3064 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, true);
3065 set_bit(vid, adapter->active_vlans);
3066 }
3067
3068 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
3069 {
3070 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3071 struct ixgbe_hw *hw = &adapter->hw;
3072 int pool_ndx = adapter->num_vfs;
3073
3074 /* remove VID from filter table */
3075 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, false);
3076 clear_bit(vid, adapter->active_vlans);
3077 }
3078
3079 /**
3080 * ixgbe_vlan_filter_disable - helper to disable hw vlan filtering
3081 * @adapter: driver data
3082 */
3083 static void ixgbe_vlan_filter_disable(struct ixgbe_adapter *adapter)
3084 {
3085 struct ixgbe_hw *hw = &adapter->hw;
3086 u32 vlnctrl;
3087
3088 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3089 vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
3090 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3091 }
3092
3093 /**
3094 * ixgbe_vlan_filter_enable - helper to enable hw vlan filtering
3095 * @adapter: driver data
3096 */
3097 static void ixgbe_vlan_filter_enable(struct ixgbe_adapter *adapter)
3098 {
3099 struct ixgbe_hw *hw = &adapter->hw;
3100 u32 vlnctrl;
3101
3102 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3103 vlnctrl |= IXGBE_VLNCTRL_VFE;
3104 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
3105 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3106 }
3107
3108 /**
3109 * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping
3110 * @adapter: driver data
3111 */
3112 static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
3113 {
3114 struct ixgbe_hw *hw = &adapter->hw;
3115 u32 vlnctrl;
3116 int i, j;
3117
3118 switch (hw->mac.type) {
3119 case ixgbe_mac_82598EB:
3120 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3121 vlnctrl &= ~IXGBE_VLNCTRL_VME;
3122 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3123 break;
3124 case ixgbe_mac_82599EB:
3125 for (i = 0; i < adapter->num_rx_queues; i++) {
3126 j = adapter->rx_ring[i]->reg_idx;
3127 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3128 vlnctrl &= ~IXGBE_RXDCTL_VME;
3129 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3130 }
3131 break;
3132 default:
3133 break;
3134 }
3135 }
3136
3137 /**
3138 * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping
3139 * @adapter: driver data
3140 */
3141 static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
3142 {
3143 struct ixgbe_hw *hw = &adapter->hw;
3144 u32 vlnctrl;
3145 int i, j;
3146
3147 switch (hw->mac.type) {
3148 case ixgbe_mac_82598EB:
3149 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3150 vlnctrl |= IXGBE_VLNCTRL_VME;
3151 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3152 break;
3153 case ixgbe_mac_82599EB:
3154 for (i = 0; i < adapter->num_rx_queues; i++) {
3155 j = adapter->rx_ring[i]->reg_idx;
3156 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3157 vlnctrl |= IXGBE_RXDCTL_VME;
3158 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3159 }
3160 break;
3161 default:
3162 break;
3163 }
3164 }
3165
3166 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
3167 {
3168 u16 vid;
3169
3170 ixgbe_vlan_rx_add_vid(adapter->netdev, 0);
3171
3172 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
3173 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
3174 }
3175
3176 /**
3177 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
3178 * @netdev: network interface device structure
3179 *
3180 * Writes unicast address list to the RAR table.
3181 * Returns: -ENOMEM on failure/insufficient address space
3182 * 0 on no addresses written
3183 * X on writing X addresses to the RAR table
3184 **/
3185 static int ixgbe_write_uc_addr_list(struct net_device *netdev)
3186 {
3187 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3188 struct ixgbe_hw *hw = &adapter->hw;
3189 unsigned int vfn = adapter->num_vfs;
3190 unsigned int rar_entries = hw->mac.num_rar_entries - (vfn + 1);
3191 int count = 0;
3192
3193 /* return ENOMEM indicating insufficient memory for addresses */
3194 if (netdev_uc_count(netdev) > rar_entries)
3195 return -ENOMEM;
3196
3197 if (!netdev_uc_empty(netdev) && rar_entries) {
3198 struct netdev_hw_addr *ha;
3199 /* return error if we do not support writing to RAR table */
3200 if (!hw->mac.ops.set_rar)
3201 return -ENOMEM;
3202
3203 netdev_for_each_uc_addr(ha, netdev) {
3204 if (!rar_entries)
3205 break;
3206 hw->mac.ops.set_rar(hw, rar_entries--, ha->addr,
3207 vfn, IXGBE_RAH_AV);
3208 count++;
3209 }
3210 }
3211 /* write the addresses in reverse order to avoid write combining */
3212 for (; rar_entries > 0 ; rar_entries--)
3213 hw->mac.ops.clear_rar(hw, rar_entries);
3214
3215 return count;
3216 }
3217
3218 /**
3219 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
3220 * @netdev: network interface device structure
3221 *
3222 * The set_rx_method entry point is called whenever the unicast/multicast
3223 * address list or the network interface flags are updated. This routine is
3224 * responsible for configuring the hardware for proper unicast, multicast and
3225 * promiscuous mode.
3226 **/
3227 void ixgbe_set_rx_mode(struct net_device *netdev)
3228 {
3229 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3230 struct ixgbe_hw *hw = &adapter->hw;
3231 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
3232 int count;
3233
3234 /* Check for Promiscuous and All Multicast modes */
3235
3236 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3237
3238 /* set all bits that we expect to always be set */
3239 fctrl |= IXGBE_FCTRL_BAM;
3240 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
3241 fctrl |= IXGBE_FCTRL_PMCF;
3242
3243 /* clear the bits we are changing the status of */
3244 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3245
3246 if (netdev->flags & IFF_PROMISC) {
3247 hw->addr_ctrl.user_set_promisc = true;
3248 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3249 vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_MPE);
3250 /* don't hardware filter vlans in promisc mode */
3251 ixgbe_vlan_filter_disable(adapter);
3252 } else {
3253 if (netdev->flags & IFF_ALLMULTI) {
3254 fctrl |= IXGBE_FCTRL_MPE;
3255 vmolr |= IXGBE_VMOLR_MPE;
3256 } else {
3257 /*
3258 * Write addresses to the MTA, if the attempt fails
3259 * then we should just turn on promiscous mode so
3260 * that we can at least receive multicast traffic
3261 */
3262 hw->mac.ops.update_mc_addr_list(hw, netdev);
3263 vmolr |= IXGBE_VMOLR_ROMPE;
3264 }
3265 ixgbe_vlan_filter_enable(adapter);
3266 hw->addr_ctrl.user_set_promisc = false;
3267 /*
3268 * Write addresses to available RAR registers, if there is not
3269 * sufficient space to store all the addresses then enable
3270 * unicast promiscous mode
3271 */
3272 count = ixgbe_write_uc_addr_list(netdev);
3273 if (count < 0) {
3274 fctrl |= IXGBE_FCTRL_UPE;
3275 vmolr |= IXGBE_VMOLR_ROPE;
3276 }
3277 }
3278
3279 if (adapter->num_vfs) {
3280 ixgbe_restore_vf_multicasts(adapter);
3281 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(adapter->num_vfs)) &
3282 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
3283 IXGBE_VMOLR_ROPE);
3284 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(adapter->num_vfs), vmolr);
3285 }
3286
3287 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
3288
3289 if (netdev->features & NETIF_F_HW_VLAN_RX)
3290 ixgbe_vlan_strip_enable(adapter);
3291 else
3292 ixgbe_vlan_strip_disable(adapter);
3293 }
3294
3295 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
3296 {
3297 int q_idx;
3298 struct ixgbe_q_vector *q_vector;
3299 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3300
3301 /* legacy and MSI only use one vector */
3302 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3303 q_vectors = 1;
3304
3305 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3306 struct napi_struct *napi;
3307 q_vector = adapter->q_vector[q_idx];
3308 napi = &q_vector->napi;
3309 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3310 if (!q_vector->rxr_count || !q_vector->txr_count) {
3311 if (q_vector->txr_count == 1)
3312 napi->poll = &ixgbe_clean_txonly;
3313 else if (q_vector->rxr_count == 1)
3314 napi->poll = &ixgbe_clean_rxonly;
3315 }
3316 }
3317
3318 napi_enable(napi);
3319 }
3320 }
3321
3322 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
3323 {
3324 int q_idx;
3325 struct ixgbe_q_vector *q_vector;
3326 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3327
3328 /* legacy and MSI only use one vector */
3329 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3330 q_vectors = 1;
3331
3332 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3333 q_vector = adapter->q_vector[q_idx];
3334 napi_disable(&q_vector->napi);
3335 }
3336 }
3337
3338 #ifdef CONFIG_IXGBE_DCB
3339 /*
3340 * ixgbe_configure_dcb - Configure DCB hardware
3341 * @adapter: ixgbe adapter struct
3342 *
3343 * This is called by the driver on open to configure the DCB hardware.
3344 * This is also called by the gennetlink interface when reconfiguring
3345 * the DCB state.
3346 */
3347 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
3348 {
3349 struct ixgbe_hw *hw = &adapter->hw;
3350 u32 txdctl;
3351 int i, j;
3352
3353 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
3354 if (hw->mac.type == ixgbe_mac_82598EB)
3355 netif_set_gso_max_size(adapter->netdev, 65536);
3356 return;
3357 }
3358
3359 if (hw->mac.type == ixgbe_mac_82598EB)
3360 netif_set_gso_max_size(adapter->netdev, 32768);
3361
3362 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_TX_CONFIG);
3363 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_RX_CONFIG);
3364
3365 /* reconfigure the hardware */
3366 ixgbe_dcb_hw_config(&adapter->hw, &adapter->dcb_cfg);
3367
3368 for (i = 0; i < adapter->num_tx_queues; i++) {
3369 j = adapter->tx_ring[i]->reg_idx;
3370 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3371 /* PThresh workaround for Tx hang with DFP enabled. */
3372 txdctl |= 32;
3373 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
3374 }
3375 /* Enable VLAN tag insert/strip */
3376 adapter->netdev->features |= NETIF_F_HW_VLAN_RX;
3377
3378 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
3379 }
3380
3381 #endif
3382 static void ixgbe_configure(struct ixgbe_adapter *adapter)
3383 {
3384 struct net_device *netdev = adapter->netdev;
3385 struct ixgbe_hw *hw = &adapter->hw;
3386 int i;
3387
3388 #ifdef CONFIG_IXGBE_DCB
3389 ixgbe_configure_dcb(adapter);
3390 #endif
3391
3392 ixgbe_set_rx_mode(netdev);
3393 ixgbe_restore_vlan(adapter);
3394
3395 #ifdef IXGBE_FCOE
3396 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
3397 ixgbe_configure_fcoe(adapter);
3398
3399 #endif /* IXGBE_FCOE */
3400 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3401 for (i = 0; i < adapter->num_tx_queues; i++)
3402 adapter->tx_ring[i]->atr_sample_rate =
3403 adapter->atr_sample_rate;
3404 ixgbe_init_fdir_signature_82599(hw, adapter->fdir_pballoc);
3405 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
3406 ixgbe_init_fdir_perfect_82599(hw, adapter->fdir_pballoc);
3407 }
3408 ixgbe_configure_virtualization(adapter);
3409
3410 ixgbe_configure_tx(adapter);
3411 ixgbe_configure_rx(adapter);
3412 }
3413
3414 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
3415 {
3416 switch (hw->phy.type) {
3417 case ixgbe_phy_sfp_avago:
3418 case ixgbe_phy_sfp_ftl:
3419 case ixgbe_phy_sfp_intel:
3420 case ixgbe_phy_sfp_unknown:
3421 case ixgbe_phy_sfp_passive_tyco:
3422 case ixgbe_phy_sfp_passive_unknown:
3423 case ixgbe_phy_sfp_active_unknown:
3424 case ixgbe_phy_sfp_ftl_active:
3425 return true;
3426 default:
3427 return false;
3428 }
3429 }
3430
3431 /**
3432 * ixgbe_sfp_link_config - set up SFP+ link
3433 * @adapter: pointer to private adapter struct
3434 **/
3435 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
3436 {
3437 struct ixgbe_hw *hw = &adapter->hw;
3438
3439 if (hw->phy.multispeed_fiber) {
3440 /*
3441 * In multispeed fiber setups, the device may not have
3442 * had a physical connection when the driver loaded.
3443 * If that's the case, the initial link configuration
3444 * couldn't get the MAC into 10G or 1G mode, so we'll
3445 * never have a link status change interrupt fire.
3446 * We need to try and force an autonegotiation
3447 * session, then bring up link.
3448 */
3449 hw->mac.ops.setup_sfp(hw);
3450 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
3451 schedule_work(&adapter->multispeed_fiber_task);
3452 } else {
3453 /*
3454 * Direct Attach Cu and non-multispeed fiber modules
3455 * still need to be configured properly prior to
3456 * attempting link.
3457 */
3458 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_MOD_TASK))
3459 schedule_work(&adapter->sfp_config_module_task);
3460 }
3461 }
3462
3463 /**
3464 * ixgbe_non_sfp_link_config - set up non-SFP+ link
3465 * @hw: pointer to private hardware struct
3466 *
3467 * Returns 0 on success, negative on failure
3468 **/
3469 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
3470 {
3471 u32 autoneg;
3472 bool negotiation, link_up = false;
3473 u32 ret = IXGBE_ERR_LINK_SETUP;
3474
3475 if (hw->mac.ops.check_link)
3476 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
3477
3478 if (ret)
3479 goto link_cfg_out;
3480
3481 if (hw->mac.ops.get_link_capabilities)
3482 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg,
3483 &negotiation);
3484 if (ret)
3485 goto link_cfg_out;
3486
3487 if (hw->mac.ops.setup_link)
3488 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
3489 link_cfg_out:
3490 return ret;
3491 }
3492
3493 static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
3494 {
3495 struct ixgbe_hw *hw = &adapter->hw;
3496 u32 gpie = 0;
3497
3498 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3499 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
3500 IXGBE_GPIE_OCD;
3501 gpie |= IXGBE_GPIE_EIAME;
3502 /*
3503 * use EIAM to auto-mask when MSI-X interrupt is asserted
3504 * this saves a register write for every interrupt
3505 */
3506 switch (hw->mac.type) {
3507 case ixgbe_mac_82598EB:
3508 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3509 break;
3510 default:
3511 case ixgbe_mac_82599EB:
3512 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
3513 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
3514 break;
3515 }
3516 } else {
3517 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
3518 * specifically only auto mask tx and rx interrupts */
3519 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3520 }
3521
3522 /* XXX: to interrupt immediately for EICS writes, enable this */
3523 /* gpie |= IXGBE_GPIE_EIMEN; */
3524
3525 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3526 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
3527 gpie |= IXGBE_GPIE_VTMODE_64;
3528 }
3529
3530 /* Enable fan failure interrupt */
3531 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
3532 gpie |= IXGBE_SDP1_GPIEN;
3533
3534 if (hw->mac.type == ixgbe_mac_82599EB)
3535 gpie |= IXGBE_SDP1_GPIEN;
3536 gpie |= IXGBE_SDP2_GPIEN;
3537
3538 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3539 }
3540
3541 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
3542 {
3543 struct ixgbe_hw *hw = &adapter->hw;
3544 int err;
3545 u32 ctrl_ext;
3546
3547 ixgbe_get_hw_control(adapter);
3548 ixgbe_setup_gpie(adapter);
3549
3550 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3551 ixgbe_configure_msix(adapter);
3552 else
3553 ixgbe_configure_msi_and_legacy(adapter);
3554
3555 /* enable the optics */
3556 if (hw->phy.multispeed_fiber)
3557 hw->mac.ops.enable_tx_laser(hw);
3558
3559 clear_bit(__IXGBE_DOWN, &adapter->state);
3560 ixgbe_napi_enable_all(adapter);
3561
3562 /* clear any pending interrupts, may auto mask */
3563 IXGBE_READ_REG(hw, IXGBE_EICR);
3564 ixgbe_irq_enable(adapter, true, true);
3565
3566 /*
3567 * If this adapter has a fan, check to see if we had a failure
3568 * before we enabled the interrupt.
3569 */
3570 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
3571 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
3572 if (esdp & IXGBE_ESDP_SDP1)
3573 e_crit(drv, "Fan has stopped, replace the adapter\n");
3574 }
3575
3576 /*
3577 * For hot-pluggable SFP+ devices, a new SFP+ module may have
3578 * arrived before interrupts were enabled but after probe. Such
3579 * devices wouldn't have their type identified yet. We need to
3580 * kick off the SFP+ module setup first, then try to bring up link.
3581 * If we're not hot-pluggable SFP+, we just need to configure link
3582 * and bring it up.
3583 */
3584 if (hw->phy.type == ixgbe_phy_unknown) {
3585 err = hw->phy.ops.identify(hw);
3586 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
3587 /*
3588 * Take the device down and schedule the sfp tasklet
3589 * which will unregister_netdev and log it.
3590 */
3591 ixgbe_down(adapter);
3592 schedule_work(&adapter->sfp_config_module_task);
3593 return err;
3594 }
3595 }
3596
3597 if (ixgbe_is_sfp(hw)) {
3598 ixgbe_sfp_link_config(adapter);
3599 } else {
3600 err = ixgbe_non_sfp_link_config(hw);
3601 if (err)
3602 e_err(probe, "link_config FAILED %d\n", err);
3603 }
3604
3605 /* enable transmits */
3606 netif_tx_start_all_queues(adapter->netdev);
3607
3608 /* bring the link up in the watchdog, this could race with our first
3609 * link up interrupt but shouldn't be a problem */
3610 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
3611 adapter->link_check_timeout = jiffies;
3612 mod_timer(&adapter->watchdog_timer, jiffies);
3613
3614 /* Set PF Reset Done bit so PF/VF Mail Ops can work */
3615 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
3616 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
3617 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
3618
3619 return 0;
3620 }
3621
3622 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
3623 {
3624 WARN_ON(in_interrupt());
3625 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
3626 msleep(1);
3627 ixgbe_down(adapter);
3628 /*
3629 * If SR-IOV enabled then wait a bit before bringing the adapter
3630 * back up to give the VFs time to respond to the reset. The
3631 * two second wait is based upon the watchdog timer cycle in
3632 * the VF driver.
3633 */
3634 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3635 msleep(2000);
3636 ixgbe_up(adapter);
3637 clear_bit(__IXGBE_RESETTING, &adapter->state);
3638 }
3639
3640 int ixgbe_up(struct ixgbe_adapter *adapter)
3641 {
3642 /* hardware has been reset, we need to reload some things */
3643 ixgbe_configure(adapter);
3644
3645 return ixgbe_up_complete(adapter);
3646 }
3647
3648 void ixgbe_reset(struct ixgbe_adapter *adapter)
3649 {
3650 struct ixgbe_hw *hw = &adapter->hw;
3651 int err;
3652
3653 err = hw->mac.ops.init_hw(hw);
3654 switch (err) {
3655 case 0:
3656 case IXGBE_ERR_SFP_NOT_PRESENT:
3657 break;
3658 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
3659 e_dev_err("master disable timed out\n");
3660 break;
3661 case IXGBE_ERR_EEPROM_VERSION:
3662 /* We are running on a pre-production device, log a warning */
3663 e_dev_warn("This device is a pre-production adapter/LOM. "
3664 "Please be aware there may be issuesassociated with "
3665 "your hardware. If you are experiencing problems "
3666 "please contact your Intel or hardware "
3667 "representative who provided you with this "
3668 "hardware.\n");
3669 break;
3670 default:
3671 e_dev_err("Hardware Error: %d\n", err);
3672 }
3673
3674 /* reprogram the RAR[0] in case user changed it. */
3675 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
3676 IXGBE_RAH_AV);
3677 }
3678
3679 /**
3680 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
3681 * @adapter: board private structure
3682 * @rx_ring: ring to free buffers from
3683 **/
3684 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
3685 struct ixgbe_ring *rx_ring)
3686 {
3687 struct pci_dev *pdev = adapter->pdev;
3688 unsigned long size;
3689 unsigned int i;
3690
3691 /* ring already cleared, nothing to do */
3692 if (!rx_ring->rx_buffer_info)
3693 return;
3694
3695 /* Free all the Rx ring sk_buffs */
3696 for (i = 0; i < rx_ring->count; i++) {
3697 struct ixgbe_rx_buffer *rx_buffer_info;
3698
3699 rx_buffer_info = &rx_ring->rx_buffer_info[i];
3700 if (rx_buffer_info->dma) {
3701 dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
3702 rx_ring->rx_buf_len,
3703 DMA_FROM_DEVICE);
3704 rx_buffer_info->dma = 0;
3705 }
3706 if (rx_buffer_info->skb) {
3707 struct sk_buff *skb = rx_buffer_info->skb;
3708 rx_buffer_info->skb = NULL;
3709 do {
3710 struct sk_buff *this = skb;
3711 if (IXGBE_RSC_CB(this)->delay_unmap) {
3712 dma_unmap_single(&pdev->dev,
3713 IXGBE_RSC_CB(this)->dma,
3714 rx_ring->rx_buf_len,
3715 DMA_FROM_DEVICE);
3716 IXGBE_RSC_CB(this)->dma = 0;
3717 IXGBE_RSC_CB(skb)->delay_unmap = false;
3718 }
3719 skb = skb->prev;
3720 dev_kfree_skb(this);
3721 } while (skb);
3722 }
3723 if (!rx_buffer_info->page)
3724 continue;
3725 if (rx_buffer_info->page_dma) {
3726 dma_unmap_page(&pdev->dev, rx_buffer_info->page_dma,
3727 PAGE_SIZE / 2, DMA_FROM_DEVICE);
3728 rx_buffer_info->page_dma = 0;
3729 }
3730 put_page(rx_buffer_info->page);
3731 rx_buffer_info->page = NULL;
3732 rx_buffer_info->page_offset = 0;
3733 }
3734
3735 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
3736 memset(rx_ring->rx_buffer_info, 0, size);
3737
3738 /* Zero out the descriptor ring */
3739 memset(rx_ring->desc, 0, rx_ring->size);
3740
3741 rx_ring->next_to_clean = 0;
3742 rx_ring->next_to_use = 0;
3743
3744 if (rx_ring->head)
3745 writel(0, adapter->hw.hw_addr + rx_ring->head);
3746 if (rx_ring->tail)
3747 writel(0, adapter->hw.hw_addr + rx_ring->tail);
3748 }
3749
3750 /**
3751 * ixgbe_clean_tx_ring - Free Tx Buffers
3752 * @adapter: board private structure
3753 * @tx_ring: ring to be cleaned
3754 **/
3755 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
3756 struct ixgbe_ring *tx_ring)
3757 {
3758 struct ixgbe_tx_buffer *tx_buffer_info;
3759 unsigned long size;
3760 unsigned int i;
3761
3762 /* ring already cleared, nothing to do */
3763 if (!tx_ring->tx_buffer_info)
3764 return;
3765
3766 /* Free all the Tx ring sk_buffs */
3767 for (i = 0; i < tx_ring->count; i++) {
3768 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3769 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
3770 }
3771
3772 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
3773 memset(tx_ring->tx_buffer_info, 0, size);
3774
3775 /* Zero out the descriptor ring */
3776 memset(tx_ring->desc, 0, tx_ring->size);
3777
3778 tx_ring->next_to_use = 0;
3779 tx_ring->next_to_clean = 0;
3780
3781 if (tx_ring->head)
3782 writel(0, adapter->hw.hw_addr + tx_ring->head);
3783 if (tx_ring->tail)
3784 writel(0, adapter->hw.hw_addr + tx_ring->tail);
3785 }
3786
3787 /**
3788 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
3789 * @adapter: board private structure
3790 **/
3791 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
3792 {
3793 int i;
3794
3795 for (i = 0; i < adapter->num_rx_queues; i++)
3796 ixgbe_clean_rx_ring(adapter, adapter->rx_ring[i]);
3797 }
3798
3799 /**
3800 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
3801 * @adapter: board private structure
3802 **/
3803 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
3804 {
3805 int i;
3806
3807 for (i = 0; i < adapter->num_tx_queues; i++)
3808 ixgbe_clean_tx_ring(adapter, adapter->tx_ring[i]);
3809 }
3810
3811 void ixgbe_down(struct ixgbe_adapter *adapter)
3812 {
3813 struct net_device *netdev = adapter->netdev;
3814 struct ixgbe_hw *hw = &adapter->hw;
3815 u32 rxctrl;
3816 u32 txdctl;
3817 int i, j;
3818 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3819
3820 /* signal that we are down to the interrupt handler */
3821 set_bit(__IXGBE_DOWN, &adapter->state);
3822
3823 /* disable receive for all VFs and wait one second */
3824 if (adapter->num_vfs) {
3825 /* ping all the active vfs to let them know we are going down */
3826 ixgbe_ping_all_vfs(adapter);
3827
3828 /* Disable all VFTE/VFRE TX/RX */
3829 ixgbe_disable_tx_rx(adapter);
3830
3831 /* Mark all the VFs as inactive */
3832 for (i = 0 ; i < adapter->num_vfs; i++)
3833 adapter->vfinfo[i].clear_to_send = 0;
3834 }
3835
3836 /* disable receives */
3837 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3838 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3839
3840 IXGBE_WRITE_FLUSH(hw);
3841 msleep(10);
3842
3843 netif_tx_stop_all_queues(netdev);
3844
3845 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3846 del_timer_sync(&adapter->sfp_timer);
3847 del_timer_sync(&adapter->watchdog_timer);
3848 cancel_work_sync(&adapter->watchdog_task);
3849
3850 netif_carrier_off(netdev);
3851 netif_tx_disable(netdev);
3852
3853 ixgbe_irq_disable(adapter);
3854
3855 ixgbe_napi_disable_all(adapter);
3856
3857 /* Cleanup the affinity_hint CPU mask memory and callback */
3858 for (i = 0; i < num_q_vectors; i++) {
3859 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
3860 /* clear the affinity_mask in the IRQ descriptor */
3861 irq_set_affinity_hint(adapter->msix_entries[i]. vector, NULL);
3862 /* release the CPU mask memory */
3863 free_cpumask_var(q_vector->affinity_mask);
3864 }
3865
3866 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3867 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
3868 cancel_work_sync(&adapter->fdir_reinit_task);
3869
3870 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
3871 cancel_work_sync(&adapter->check_overtemp_task);
3872
3873 /* disable transmits in the hardware now that interrupts are off */
3874 for (i = 0; i < adapter->num_tx_queues; i++) {
3875 j = adapter->tx_ring[i]->reg_idx;
3876 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3877 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
3878 (txdctl & ~IXGBE_TXDCTL_ENABLE));
3879 }
3880 /* Disable the Tx DMA engine on 82599 */
3881 if (hw->mac.type == ixgbe_mac_82599EB)
3882 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
3883 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
3884 ~IXGBE_DMATXCTL_TE));
3885
3886 /* power down the optics */
3887 if (hw->phy.multispeed_fiber)
3888 hw->mac.ops.disable_tx_laser(hw);
3889
3890 /* clear n-tuple filters that are cached */
3891 ethtool_ntuple_flush(netdev);
3892
3893 if (!pci_channel_offline(adapter->pdev))
3894 ixgbe_reset(adapter);
3895 ixgbe_clean_all_tx_rings(adapter);
3896 ixgbe_clean_all_rx_rings(adapter);
3897
3898 #ifdef CONFIG_IXGBE_DCA
3899 /* since we reset the hardware DCA settings were cleared */
3900 ixgbe_setup_dca(adapter);
3901 #endif
3902 }
3903
3904 /**
3905 * ixgbe_poll - NAPI Rx polling callback
3906 * @napi: structure for representing this polling device
3907 * @budget: how many packets driver is allowed to clean
3908 *
3909 * This function is used for legacy and MSI, NAPI mode
3910 **/
3911 static int ixgbe_poll(struct napi_struct *napi, int budget)
3912 {
3913 struct ixgbe_q_vector *q_vector =
3914 container_of(napi, struct ixgbe_q_vector, napi);
3915 struct ixgbe_adapter *adapter = q_vector->adapter;
3916 int tx_clean_complete, work_done = 0;
3917
3918 #ifdef CONFIG_IXGBE_DCA
3919 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
3920 ixgbe_update_tx_dca(adapter, adapter->tx_ring[0]);
3921 ixgbe_update_rx_dca(adapter, adapter->rx_ring[0]);
3922 }
3923 #endif
3924
3925 tx_clean_complete = ixgbe_clean_tx_irq(q_vector, adapter->tx_ring[0]);
3926 ixgbe_clean_rx_irq(q_vector, adapter->rx_ring[0], &work_done, budget);
3927
3928 if (!tx_clean_complete)
3929 work_done = budget;
3930
3931 /* If budget not fully consumed, exit the polling mode */
3932 if (work_done < budget) {
3933 napi_complete(napi);
3934 if (adapter->rx_itr_setting & 1)
3935 ixgbe_set_itr(adapter);
3936 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3937 ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
3938 }
3939 return work_done;
3940 }
3941
3942 /**
3943 * ixgbe_tx_timeout - Respond to a Tx Hang
3944 * @netdev: network interface device structure
3945 **/
3946 static void ixgbe_tx_timeout(struct net_device *netdev)
3947 {
3948 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3949
3950 /* Do the reset outside of interrupt context */
3951 schedule_work(&adapter->reset_task);
3952 }
3953
3954 static void ixgbe_reset_task(struct work_struct *work)
3955 {
3956 struct ixgbe_adapter *adapter;
3957 adapter = container_of(work, struct ixgbe_adapter, reset_task);
3958
3959 /* If we're already down or resetting, just bail */
3960 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
3961 test_bit(__IXGBE_RESETTING, &adapter->state))
3962 return;
3963
3964 adapter->tx_timeout_count++;
3965
3966 ixgbe_dump(adapter);
3967 netdev_err(adapter->netdev, "Reset adapter\n");
3968 ixgbe_reinit_locked(adapter);
3969 }
3970
3971 #ifdef CONFIG_IXGBE_DCB
3972 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
3973 {
3974 bool ret = false;
3975 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_DCB];
3976
3977 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
3978 return ret;
3979
3980 f->mask = 0x7 << 3;
3981 adapter->num_rx_queues = f->indices;
3982 adapter->num_tx_queues = f->indices;
3983 ret = true;
3984
3985 return ret;
3986 }
3987 #endif
3988
3989 /**
3990 * ixgbe_set_rss_queues: Allocate queues for RSS
3991 * @adapter: board private structure to initialize
3992 *
3993 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
3994 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
3995 *
3996 **/
3997 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
3998 {
3999 bool ret = false;
4000 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
4001
4002 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4003 f->mask = 0xF;
4004 adapter->num_rx_queues = f->indices;
4005 adapter->num_tx_queues = f->indices;
4006 ret = true;
4007 } else {
4008 ret = false;
4009 }
4010
4011 return ret;
4012 }
4013
4014 /**
4015 * ixgbe_set_fdir_queues: Allocate queues for Flow Director
4016 * @adapter: board private structure to initialize
4017 *
4018 * Flow Director is an advanced Rx filter, attempting to get Rx flows back
4019 * to the original CPU that initiated the Tx session. This runs in addition
4020 * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
4021 * Rx load across CPUs using RSS.
4022 *
4023 **/
4024 static inline bool ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
4025 {
4026 bool ret = false;
4027 struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
4028
4029 f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
4030 f_fdir->mask = 0;
4031
4032 /* Flow Director must have RSS enabled */
4033 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
4034 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
4035 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)))) {
4036 adapter->num_tx_queues = f_fdir->indices;
4037 adapter->num_rx_queues = f_fdir->indices;
4038 ret = true;
4039 } else {
4040 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4041 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4042 }
4043 return ret;
4044 }
4045
4046 #ifdef IXGBE_FCOE
4047 /**
4048 * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
4049 * @adapter: board private structure to initialize
4050 *
4051 * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
4052 * The ring feature mask is not used as a mask for FCoE, as it can take any 8
4053 * rx queues out of the max number of rx queues, instead, it is used as the
4054 * index of the first rx queue used by FCoE.
4055 *
4056 **/
4057 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
4058 {
4059 bool ret = false;
4060 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4061
4062 f->indices = min((int)num_online_cpus(), f->indices);
4063 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
4064 adapter->num_rx_queues = 1;
4065 adapter->num_tx_queues = 1;
4066 #ifdef CONFIG_IXGBE_DCB
4067 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4068 e_info(probe, "FCoE enabled with DCB\n");
4069 ixgbe_set_dcb_queues(adapter);
4070 }
4071 #endif
4072 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4073 e_info(probe, "FCoE enabled with RSS\n");
4074 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4075 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
4076 ixgbe_set_fdir_queues(adapter);
4077 else
4078 ixgbe_set_rss_queues(adapter);
4079 }
4080 /* adding FCoE rx rings to the end */
4081 f->mask = adapter->num_rx_queues;
4082 adapter->num_rx_queues += f->indices;
4083 adapter->num_tx_queues += f->indices;
4084
4085 ret = true;
4086 }
4087
4088 return ret;
4089 }
4090
4091 #endif /* IXGBE_FCOE */
4092 /**
4093 * ixgbe_set_sriov_queues: Allocate queues for IOV use
4094 * @adapter: board private structure to initialize
4095 *
4096 * IOV doesn't actually use anything, so just NAK the
4097 * request for now and let the other queue routines
4098 * figure out what to do.
4099 */
4100 static inline bool ixgbe_set_sriov_queues(struct ixgbe_adapter *adapter)
4101 {
4102 return false;
4103 }
4104
4105 /*
4106 * ixgbe_set_num_queues: Allocate queues for device, feature dependant
4107 * @adapter: board private structure to initialize
4108 *
4109 * This is the top level queue allocation routine. The order here is very
4110 * important, starting with the "most" number of features turned on at once,
4111 * and ending with the smallest set of features. This way large combinations
4112 * can be allocated if they're turned on, and smaller combinations are the
4113 * fallthrough conditions.
4114 *
4115 **/
4116 static int ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
4117 {
4118 /* Start with base case */
4119 adapter->num_rx_queues = 1;
4120 adapter->num_tx_queues = 1;
4121 adapter->num_rx_pools = adapter->num_rx_queues;
4122 adapter->num_rx_queues_per_pool = 1;
4123
4124 if (ixgbe_set_sriov_queues(adapter))
4125 goto done;
4126
4127 #ifdef IXGBE_FCOE
4128 if (ixgbe_set_fcoe_queues(adapter))
4129 goto done;
4130
4131 #endif /* IXGBE_FCOE */
4132 #ifdef CONFIG_IXGBE_DCB
4133 if (ixgbe_set_dcb_queues(adapter))
4134 goto done;
4135
4136 #endif
4137 if (ixgbe_set_fdir_queues(adapter))
4138 goto done;
4139
4140 if (ixgbe_set_rss_queues(adapter))
4141 goto done;
4142
4143 /* fallback to base case */
4144 adapter->num_rx_queues = 1;
4145 adapter->num_tx_queues = 1;
4146
4147 done:
4148 /* Notify the stack of the (possibly) reduced queue counts. */
4149 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
4150 return netif_set_real_num_rx_queues(adapter->netdev,
4151 adapter->num_rx_queues);
4152 }
4153
4154 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
4155 int vectors)
4156 {
4157 int err, vector_threshold;
4158
4159 /* We'll want at least 3 (vector_threshold):
4160 * 1) TxQ[0] Cleanup
4161 * 2) RxQ[0] Cleanup
4162 * 3) Other (Link Status Change, etc.)
4163 * 4) TCP Timer (optional)
4164 */
4165 vector_threshold = MIN_MSIX_COUNT;
4166
4167 /* The more we get, the more we will assign to Tx/Rx Cleanup
4168 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
4169 * Right now, we simply care about how many we'll get; we'll
4170 * set them up later while requesting irq's.
4171 */
4172 while (vectors >= vector_threshold) {
4173 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
4174 vectors);
4175 if (!err) /* Success in acquiring all requested vectors. */
4176 break;
4177 else if (err < 0)
4178 vectors = 0; /* Nasty failure, quit now */
4179 else /* err == number of vectors we should try again with */
4180 vectors = err;
4181 }
4182
4183 if (vectors < vector_threshold) {
4184 /* Can't allocate enough MSI-X interrupts? Oh well.
4185 * This just means we'll go with either a single MSI
4186 * vector or fall back to legacy interrupts.
4187 */
4188 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4189 "Unable to allocate MSI-X interrupts\n");
4190 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4191 kfree(adapter->msix_entries);
4192 adapter->msix_entries = NULL;
4193 } else {
4194 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
4195 /*
4196 * Adjust for only the vectors we'll use, which is minimum
4197 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
4198 * vectors we were allocated.
4199 */
4200 adapter->num_msix_vectors = min(vectors,
4201 adapter->max_msix_q_vectors + NON_Q_VECTORS);
4202 }
4203 }
4204
4205 /**
4206 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
4207 * @adapter: board private structure to initialize
4208 *
4209 * Cache the descriptor ring offsets for RSS to the assigned rings.
4210 *
4211 **/
4212 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
4213 {
4214 int i;
4215 bool ret = false;
4216
4217 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4218 for (i = 0; i < adapter->num_rx_queues; i++)
4219 adapter->rx_ring[i]->reg_idx = i;
4220 for (i = 0; i < adapter->num_tx_queues; i++)
4221 adapter->tx_ring[i]->reg_idx = i;
4222 ret = true;
4223 } else {
4224 ret = false;
4225 }
4226
4227 return ret;
4228 }
4229
4230 #ifdef CONFIG_IXGBE_DCB
4231 /**
4232 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
4233 * @adapter: board private structure to initialize
4234 *
4235 * Cache the descriptor ring offsets for DCB to the assigned rings.
4236 *
4237 **/
4238 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
4239 {
4240 int i;
4241 bool ret = false;
4242 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
4243
4244 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4245 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
4246 /* the number of queues is assumed to be symmetric */
4247 for (i = 0; i < dcb_i; i++) {
4248 adapter->rx_ring[i]->reg_idx = i << 3;
4249 adapter->tx_ring[i]->reg_idx = i << 2;
4250 }
4251 ret = true;
4252 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
4253 if (dcb_i == 8) {
4254 /*
4255 * Tx TC0 starts at: descriptor queue 0
4256 * Tx TC1 starts at: descriptor queue 32
4257 * Tx TC2 starts at: descriptor queue 64
4258 * Tx TC3 starts at: descriptor queue 80
4259 * Tx TC4 starts at: descriptor queue 96
4260 * Tx TC5 starts at: descriptor queue 104
4261 * Tx TC6 starts at: descriptor queue 112
4262 * Tx TC7 starts at: descriptor queue 120
4263 *
4264 * Rx TC0-TC7 are offset by 16 queues each
4265 */
4266 for (i = 0; i < 3; i++) {
4267 adapter->tx_ring[i]->reg_idx = i << 5;
4268 adapter->rx_ring[i]->reg_idx = i << 4;
4269 }
4270 for ( ; i < 5; i++) {
4271 adapter->tx_ring[i]->reg_idx =
4272 ((i + 2) << 4);
4273 adapter->rx_ring[i]->reg_idx = i << 4;
4274 }
4275 for ( ; i < dcb_i; i++) {
4276 adapter->tx_ring[i]->reg_idx =
4277 ((i + 8) << 3);
4278 adapter->rx_ring[i]->reg_idx = i << 4;
4279 }
4280
4281 ret = true;
4282 } else if (dcb_i == 4) {
4283 /*
4284 * Tx TC0 starts at: descriptor queue 0
4285 * Tx TC1 starts at: descriptor queue 64
4286 * Tx TC2 starts at: descriptor queue 96
4287 * Tx TC3 starts at: descriptor queue 112
4288 *
4289 * Rx TC0-TC3 are offset by 32 queues each
4290 */
4291 adapter->tx_ring[0]->reg_idx = 0;
4292 adapter->tx_ring[1]->reg_idx = 64;
4293 adapter->tx_ring[2]->reg_idx = 96;
4294 adapter->tx_ring[3]->reg_idx = 112;
4295 for (i = 0 ; i < dcb_i; i++)
4296 adapter->rx_ring[i]->reg_idx = i << 5;
4297
4298 ret = true;
4299 } else {
4300 ret = false;
4301 }
4302 } else {
4303 ret = false;
4304 }
4305 } else {
4306 ret = false;
4307 }
4308
4309 return ret;
4310 }
4311 #endif
4312
4313 /**
4314 * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
4315 * @adapter: board private structure to initialize
4316 *
4317 * Cache the descriptor ring offsets for Flow Director to the assigned rings.
4318 *
4319 **/
4320 static inline bool ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
4321 {
4322 int i;
4323 bool ret = false;
4324
4325 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
4326 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4327 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))) {
4328 for (i = 0; i < adapter->num_rx_queues; i++)
4329 adapter->rx_ring[i]->reg_idx = i;
4330 for (i = 0; i < adapter->num_tx_queues; i++)
4331 adapter->tx_ring[i]->reg_idx = i;
4332 ret = true;
4333 }
4334
4335 return ret;
4336 }
4337
4338 #ifdef IXGBE_FCOE
4339 /**
4340 * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
4341 * @adapter: board private structure to initialize
4342 *
4343 * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
4344 *
4345 */
4346 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
4347 {
4348 int i, fcoe_rx_i = 0, fcoe_tx_i = 0;
4349 bool ret = false;
4350 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4351
4352 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
4353 #ifdef CONFIG_IXGBE_DCB
4354 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4355 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
4356
4357 ixgbe_cache_ring_dcb(adapter);
4358 /* find out queues in TC for FCoE */
4359 fcoe_rx_i = adapter->rx_ring[fcoe->tc]->reg_idx + 1;
4360 fcoe_tx_i = adapter->tx_ring[fcoe->tc]->reg_idx + 1;
4361 /*
4362 * In 82599, the number of Tx queues for each traffic
4363 * class for both 8-TC and 4-TC modes are:
4364 * TCs : TC0 TC1 TC2 TC3 TC4 TC5 TC6 TC7
4365 * 8 TCs: 32 32 16 16 8 8 8 8
4366 * 4 TCs: 64 64 32 32
4367 * We have max 8 queues for FCoE, where 8 the is
4368 * FCoE redirection table size. If TC for FCoE is
4369 * less than or equal to TC3, we have enough queues
4370 * to add max of 8 queues for FCoE, so we start FCoE
4371 * tx descriptor from the next one, i.e., reg_idx + 1.
4372 * If TC for FCoE is above TC3, implying 8 TC mode,
4373 * and we need 8 for FCoE, we have to take all queues
4374 * in that traffic class for FCoE.
4375 */
4376 if ((f->indices == IXGBE_FCRETA_SIZE) && (fcoe->tc > 3))
4377 fcoe_tx_i--;
4378 }
4379 #endif /* CONFIG_IXGBE_DCB */
4380 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4381 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4382 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
4383 ixgbe_cache_ring_fdir(adapter);
4384 else
4385 ixgbe_cache_ring_rss(adapter);
4386
4387 fcoe_rx_i = f->mask;
4388 fcoe_tx_i = f->mask;
4389 }
4390 for (i = 0; i < f->indices; i++, fcoe_rx_i++, fcoe_tx_i++) {
4391 adapter->rx_ring[f->mask + i]->reg_idx = fcoe_rx_i;
4392 adapter->tx_ring[f->mask + i]->reg_idx = fcoe_tx_i;
4393 }
4394 ret = true;
4395 }
4396 return ret;
4397 }
4398
4399 #endif /* IXGBE_FCOE */
4400 /**
4401 * ixgbe_cache_ring_sriov - Descriptor ring to register mapping for sriov
4402 * @adapter: board private structure to initialize
4403 *
4404 * SR-IOV doesn't use any descriptor rings but changes the default if
4405 * no other mapping is used.
4406 *
4407 */
4408 static inline bool ixgbe_cache_ring_sriov(struct ixgbe_adapter *adapter)
4409 {
4410 adapter->rx_ring[0]->reg_idx = adapter->num_vfs * 2;
4411 adapter->tx_ring[0]->reg_idx = adapter->num_vfs * 2;
4412 if (adapter->num_vfs)
4413 return true;
4414 else
4415 return false;
4416 }
4417
4418 /**
4419 * ixgbe_cache_ring_register - Descriptor ring to register mapping
4420 * @adapter: board private structure to initialize
4421 *
4422 * Once we know the feature-set enabled for the device, we'll cache
4423 * the register offset the descriptor ring is assigned to.
4424 *
4425 * Note, the order the various feature calls is important. It must start with
4426 * the "most" features enabled at the same time, then trickle down to the
4427 * least amount of features turned on at once.
4428 **/
4429 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
4430 {
4431 /* start with default case */
4432 adapter->rx_ring[0]->reg_idx = 0;
4433 adapter->tx_ring[0]->reg_idx = 0;
4434
4435 if (ixgbe_cache_ring_sriov(adapter))
4436 return;
4437
4438 #ifdef IXGBE_FCOE
4439 if (ixgbe_cache_ring_fcoe(adapter))
4440 return;
4441
4442 #endif /* IXGBE_FCOE */
4443 #ifdef CONFIG_IXGBE_DCB
4444 if (ixgbe_cache_ring_dcb(adapter))
4445 return;
4446
4447 #endif
4448 if (ixgbe_cache_ring_fdir(adapter))
4449 return;
4450
4451 if (ixgbe_cache_ring_rss(adapter))
4452 return;
4453 }
4454
4455 /**
4456 * ixgbe_alloc_queues - Allocate memory for all rings
4457 * @adapter: board private structure to initialize
4458 *
4459 * We allocate one ring per queue at run-time since we don't know the
4460 * number of queues at compile-time. The polling_netdev array is
4461 * intended for Multiqueue, but should work fine with a single queue.
4462 **/
4463 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
4464 {
4465 int i;
4466 int orig_node = adapter->node;
4467
4468 for (i = 0; i < adapter->num_tx_queues; i++) {
4469 struct ixgbe_ring *ring = adapter->tx_ring[i];
4470 if (orig_node == -1) {
4471 int cur_node = next_online_node(adapter->node);
4472 if (cur_node == MAX_NUMNODES)
4473 cur_node = first_online_node;
4474 adapter->node = cur_node;
4475 }
4476 ring = kzalloc_node(sizeof(struct ixgbe_ring), GFP_KERNEL,
4477 adapter->node);
4478 if (!ring)
4479 ring = kzalloc(sizeof(struct ixgbe_ring), GFP_KERNEL);
4480 if (!ring)
4481 goto err_tx_ring_allocation;
4482 ring->count = adapter->tx_ring_count;
4483 ring->queue_index = i;
4484 ring->numa_node = adapter->node;
4485
4486 adapter->tx_ring[i] = ring;
4487 }
4488
4489 /* Restore the adapter's original node */
4490 adapter->node = orig_node;
4491
4492 for (i = 0; i < adapter->num_rx_queues; i++) {
4493 struct ixgbe_ring *ring = adapter->rx_ring[i];
4494 if (orig_node == -1) {
4495 int cur_node = next_online_node(adapter->node);
4496 if (cur_node == MAX_NUMNODES)
4497 cur_node = first_online_node;
4498 adapter->node = cur_node;
4499 }
4500 ring = kzalloc_node(sizeof(struct ixgbe_ring), GFP_KERNEL,
4501 adapter->node);
4502 if (!ring)
4503 ring = kzalloc(sizeof(struct ixgbe_ring), GFP_KERNEL);
4504 if (!ring)
4505 goto err_rx_ring_allocation;
4506 ring->count = adapter->rx_ring_count;
4507 ring->queue_index = i;
4508 ring->numa_node = adapter->node;
4509
4510 adapter->rx_ring[i] = ring;
4511 }
4512
4513 /* Restore the adapter's original node */
4514 adapter->node = orig_node;
4515
4516 ixgbe_cache_ring_register(adapter);
4517
4518 return 0;
4519
4520 err_rx_ring_allocation:
4521 for (i = 0; i < adapter->num_tx_queues; i++)
4522 kfree(adapter->tx_ring[i]);
4523 err_tx_ring_allocation:
4524 return -ENOMEM;
4525 }
4526
4527 /**
4528 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
4529 * @adapter: board private structure to initialize
4530 *
4531 * Attempt to configure the interrupts using the best available
4532 * capabilities of the hardware and the kernel.
4533 **/
4534 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
4535 {
4536 struct ixgbe_hw *hw = &adapter->hw;
4537 int err = 0;
4538 int vector, v_budget;
4539
4540 /*
4541 * It's easy to be greedy for MSI-X vectors, but it really
4542 * doesn't do us much good if we have a lot more vectors
4543 * than CPU's. So let's be conservative and only ask for
4544 * (roughly) the same number of vectors as there are CPU's.
4545 */
4546 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
4547 (int)num_online_cpus()) + NON_Q_VECTORS;
4548
4549 /*
4550 * At the same time, hardware can only support a maximum of
4551 * hw.mac->max_msix_vectors vectors. With features
4552 * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
4553 * descriptor queues supported by our device. Thus, we cap it off in
4554 * those rare cases where the cpu count also exceeds our vector limit.
4555 */
4556 v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
4557
4558 /* A failure in MSI-X entry allocation isn't fatal, but it does
4559 * mean we disable MSI-X capabilities of the adapter. */
4560 adapter->msix_entries = kcalloc(v_budget,
4561 sizeof(struct msix_entry), GFP_KERNEL);
4562 if (adapter->msix_entries) {
4563 for (vector = 0; vector < v_budget; vector++)
4564 adapter->msix_entries[vector].entry = vector;
4565
4566 ixgbe_acquire_msix_vectors(adapter, v_budget);
4567
4568 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4569 goto out;
4570 }
4571
4572 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
4573 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
4574 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4575 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4576 adapter->atr_sample_rate = 0;
4577 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4578 ixgbe_disable_sriov(adapter);
4579
4580 err = ixgbe_set_num_queues(adapter);
4581 if (err)
4582 return err;
4583
4584 err = pci_enable_msi(adapter->pdev);
4585 if (!err) {
4586 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
4587 } else {
4588 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4589 "Unable to allocate MSI interrupt, "
4590 "falling back to legacy. Error: %d\n", err);
4591 /* reset err */
4592 err = 0;
4593 }
4594
4595 out:
4596 return err;
4597 }
4598
4599 /**
4600 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
4601 * @adapter: board private structure to initialize
4602 *
4603 * We allocate one q_vector per queue interrupt. If allocation fails we
4604 * return -ENOMEM.
4605 **/
4606 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
4607 {
4608 int q_idx, num_q_vectors;
4609 struct ixgbe_q_vector *q_vector;
4610 int napi_vectors;
4611 int (*poll)(struct napi_struct *, int);
4612
4613 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4614 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4615 napi_vectors = adapter->num_rx_queues;
4616 poll = &ixgbe_clean_rxtx_many;
4617 } else {
4618 num_q_vectors = 1;
4619 napi_vectors = 1;
4620 poll = &ixgbe_poll;
4621 }
4622
4623 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4624 q_vector = kzalloc_node(sizeof(struct ixgbe_q_vector),
4625 GFP_KERNEL, adapter->node);
4626 if (!q_vector)
4627 q_vector = kzalloc(sizeof(struct ixgbe_q_vector),
4628 GFP_KERNEL);
4629 if (!q_vector)
4630 goto err_out;
4631 q_vector->adapter = adapter;
4632 if (q_vector->txr_count && !q_vector->rxr_count)
4633 q_vector->eitr = adapter->tx_eitr_param;
4634 else
4635 q_vector->eitr = adapter->rx_eitr_param;
4636 q_vector->v_idx = q_idx;
4637 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
4638 adapter->q_vector[q_idx] = q_vector;
4639 }
4640
4641 return 0;
4642
4643 err_out:
4644 while (q_idx) {
4645 q_idx--;
4646 q_vector = adapter->q_vector[q_idx];
4647 netif_napi_del(&q_vector->napi);
4648 kfree(q_vector);
4649 adapter->q_vector[q_idx] = NULL;
4650 }
4651 return -ENOMEM;
4652 }
4653
4654 /**
4655 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
4656 * @adapter: board private structure to initialize
4657 *
4658 * This function frees the memory allocated to the q_vectors. In addition if
4659 * NAPI is enabled it will delete any references to the NAPI struct prior
4660 * to freeing the q_vector.
4661 **/
4662 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
4663 {
4664 int q_idx, num_q_vectors;
4665
4666 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4667 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4668 else
4669 num_q_vectors = 1;
4670
4671 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4672 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
4673 adapter->q_vector[q_idx] = NULL;
4674 netif_napi_del(&q_vector->napi);
4675 kfree(q_vector);
4676 }
4677 }
4678
4679 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
4680 {
4681 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4682 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4683 pci_disable_msix(adapter->pdev);
4684 kfree(adapter->msix_entries);
4685 adapter->msix_entries = NULL;
4686 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
4687 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
4688 pci_disable_msi(adapter->pdev);
4689 }
4690 }
4691
4692 /**
4693 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
4694 * @adapter: board private structure to initialize
4695 *
4696 * We determine which interrupt scheme to use based on...
4697 * - Kernel support (MSI, MSI-X)
4698 * - which can be user-defined (via MODULE_PARAM)
4699 * - Hardware queue count (num_*_queues)
4700 * - defined by miscellaneous hardware support/features (RSS, etc.)
4701 **/
4702 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
4703 {
4704 int err;
4705
4706 /* Number of supported queues */
4707 err = ixgbe_set_num_queues(adapter);
4708 if (err)
4709 return err;
4710
4711 err = ixgbe_set_interrupt_capability(adapter);
4712 if (err) {
4713 e_dev_err("Unable to setup interrupt capabilities\n");
4714 goto err_set_interrupt;
4715 }
4716
4717 err = ixgbe_alloc_q_vectors(adapter);
4718 if (err) {
4719 e_dev_err("Unable to allocate memory for queue vectors\n");
4720 goto err_alloc_q_vectors;
4721 }
4722
4723 err = ixgbe_alloc_queues(adapter);
4724 if (err) {
4725 e_dev_err("Unable to allocate memory for queues\n");
4726 goto err_alloc_queues;
4727 }
4728
4729 e_dev_info("Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u\n",
4730 (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
4731 adapter->num_rx_queues, adapter->num_tx_queues);
4732
4733 set_bit(__IXGBE_DOWN, &adapter->state);
4734
4735 return 0;
4736
4737 err_alloc_queues:
4738 ixgbe_free_q_vectors(adapter);
4739 err_alloc_q_vectors:
4740 ixgbe_reset_interrupt_capability(adapter);
4741 err_set_interrupt:
4742 return err;
4743 }
4744
4745 /**
4746 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
4747 * @adapter: board private structure to clear interrupt scheme on
4748 *
4749 * We go through and clear interrupt specific resources and reset the structure
4750 * to pre-load conditions
4751 **/
4752 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
4753 {
4754 int i;
4755
4756 for (i = 0; i < adapter->num_tx_queues; i++) {
4757 kfree(adapter->tx_ring[i]);
4758 adapter->tx_ring[i] = NULL;
4759 }
4760 for (i = 0; i < adapter->num_rx_queues; i++) {
4761 kfree(adapter->rx_ring[i]);
4762 adapter->rx_ring[i] = NULL;
4763 }
4764
4765 ixgbe_free_q_vectors(adapter);
4766 ixgbe_reset_interrupt_capability(adapter);
4767 }
4768
4769 /**
4770 * ixgbe_sfp_timer - worker thread to find a missing module
4771 * @data: pointer to our adapter struct
4772 **/
4773 static void ixgbe_sfp_timer(unsigned long data)
4774 {
4775 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4776
4777 /*
4778 * Do the sfp_timer outside of interrupt context due to the
4779 * delays that sfp+ detection requires
4780 */
4781 schedule_work(&adapter->sfp_task);
4782 }
4783
4784 /**
4785 * ixgbe_sfp_task - worker thread to find a missing module
4786 * @work: pointer to work_struct containing our data
4787 **/
4788 static void ixgbe_sfp_task(struct work_struct *work)
4789 {
4790 struct ixgbe_adapter *adapter = container_of(work,
4791 struct ixgbe_adapter,
4792 sfp_task);
4793 struct ixgbe_hw *hw = &adapter->hw;
4794
4795 if ((hw->phy.type == ixgbe_phy_nl) &&
4796 (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
4797 s32 ret = hw->phy.ops.identify_sfp(hw);
4798 if (ret == IXGBE_ERR_SFP_NOT_PRESENT)
4799 goto reschedule;
4800 ret = hw->phy.ops.reset(hw);
4801 if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
4802 e_dev_err("failed to initialize because an unsupported "
4803 "SFP+ module type was detected.\n");
4804 e_dev_err("Reload the driver after installing a "
4805 "supported module.\n");
4806 unregister_netdev(adapter->netdev);
4807 } else {
4808 e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
4809 }
4810 /* don't need this routine any more */
4811 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
4812 }
4813 return;
4814 reschedule:
4815 if (test_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state))
4816 mod_timer(&adapter->sfp_timer,
4817 round_jiffies(jiffies + (2 * HZ)));
4818 }
4819
4820 /**
4821 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
4822 * @adapter: board private structure to initialize
4823 *
4824 * ixgbe_sw_init initializes the Adapter private data structure.
4825 * Fields are initialized based on PCI device information and
4826 * OS network device settings (MTU size).
4827 **/
4828 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
4829 {
4830 struct ixgbe_hw *hw = &adapter->hw;
4831 struct pci_dev *pdev = adapter->pdev;
4832 struct net_device *dev = adapter->netdev;
4833 unsigned int rss;
4834 #ifdef CONFIG_IXGBE_DCB
4835 int j;
4836 struct tc_configuration *tc;
4837 #endif
4838
4839 /* PCI config space info */
4840
4841 hw->vendor_id = pdev->vendor;
4842 hw->device_id = pdev->device;
4843 hw->revision_id = pdev->revision;
4844 hw->subsystem_vendor_id = pdev->subsystem_vendor;
4845 hw->subsystem_device_id = pdev->subsystem_device;
4846
4847 /* Set capability flags */
4848 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
4849 adapter->ring_feature[RING_F_RSS].indices = rss;
4850 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
4851 adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
4852 if (hw->mac.type == ixgbe_mac_82598EB) {
4853 if (hw->device_id == IXGBE_DEV_ID_82598AT)
4854 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
4855 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
4856 } else if (hw->mac.type == ixgbe_mac_82599EB) {
4857 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
4858 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
4859 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
4860 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
4861 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
4862 if (dev->features & NETIF_F_NTUPLE) {
4863 /* Flow Director perfect filter enabled */
4864 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4865 adapter->atr_sample_rate = 0;
4866 spin_lock_init(&adapter->fdir_perfect_lock);
4867 } else {
4868 /* Flow Director hash filters enabled */
4869 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
4870 adapter->atr_sample_rate = 20;
4871 }
4872 adapter->ring_feature[RING_F_FDIR].indices =
4873 IXGBE_MAX_FDIR_INDICES;
4874 adapter->fdir_pballoc = 0;
4875 #ifdef IXGBE_FCOE
4876 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
4877 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
4878 adapter->ring_feature[RING_F_FCOE].indices = 0;
4879 #ifdef CONFIG_IXGBE_DCB
4880 /* Default traffic class to use for FCoE */
4881 adapter->fcoe.tc = IXGBE_FCOE_DEFTC;
4882 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
4883 #endif
4884 #endif /* IXGBE_FCOE */
4885 }
4886
4887 #ifdef CONFIG_IXGBE_DCB
4888 /* Configure DCB traffic classes */
4889 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
4890 tc = &adapter->dcb_cfg.tc_config[j];
4891 tc->path[DCB_TX_CONFIG].bwg_id = 0;
4892 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
4893 tc->path[DCB_RX_CONFIG].bwg_id = 0;
4894 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
4895 tc->dcb_pfc = pfc_disabled;
4896 }
4897 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
4898 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
4899 adapter->dcb_cfg.rx_pba_cfg = pba_equal;
4900 adapter->dcb_cfg.pfc_mode_enable = false;
4901 adapter->dcb_cfg.round_robin_enable = false;
4902 adapter->dcb_set_bitmap = 0x00;
4903 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
4904 adapter->ring_feature[RING_F_DCB].indices);
4905
4906 #endif
4907
4908 /* default flow control settings */
4909 hw->fc.requested_mode = ixgbe_fc_full;
4910 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
4911 #ifdef CONFIG_DCB
4912 adapter->last_lfc_mode = hw->fc.current_mode;
4913 #endif
4914 hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
4915 hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
4916 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
4917 hw->fc.send_xon = true;
4918 hw->fc.disable_fc_autoneg = false;
4919
4920 /* enable itr by default in dynamic mode */
4921 adapter->rx_itr_setting = 1;
4922 adapter->rx_eitr_param = 20000;
4923 adapter->tx_itr_setting = 1;
4924 adapter->tx_eitr_param = 10000;
4925
4926 /* set defaults for eitr in MegaBytes */
4927 adapter->eitr_low = 10;
4928 adapter->eitr_high = 20;
4929
4930 /* set default ring sizes */
4931 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
4932 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
4933
4934 /* initialize eeprom parameters */
4935 if (ixgbe_init_eeprom_params_generic(hw)) {
4936 e_dev_err("EEPROM initialization failed\n");
4937 return -EIO;
4938 }
4939
4940 /* enable rx csum by default */
4941 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
4942
4943 /* get assigned NUMA node */
4944 adapter->node = dev_to_node(&pdev->dev);
4945
4946 set_bit(__IXGBE_DOWN, &adapter->state);
4947
4948 return 0;
4949 }
4950
4951 /**
4952 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
4953 * @adapter: board private structure
4954 * @tx_ring: tx descriptor ring (for a specific queue) to setup
4955 *
4956 * Return 0 on success, negative on failure
4957 **/
4958 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
4959 struct ixgbe_ring *tx_ring)
4960 {
4961 struct pci_dev *pdev = adapter->pdev;
4962 int size;
4963
4964 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
4965 tx_ring->tx_buffer_info = vmalloc_node(size, tx_ring->numa_node);
4966 if (!tx_ring->tx_buffer_info)
4967 tx_ring->tx_buffer_info = vmalloc(size);
4968 if (!tx_ring->tx_buffer_info)
4969 goto err;
4970 memset(tx_ring->tx_buffer_info, 0, size);
4971
4972 /* round up to nearest 4K */
4973 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
4974 tx_ring->size = ALIGN(tx_ring->size, 4096);
4975
4976 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
4977 &tx_ring->dma, GFP_KERNEL);
4978 if (!tx_ring->desc)
4979 goto err;
4980
4981 tx_ring->next_to_use = 0;
4982 tx_ring->next_to_clean = 0;
4983 tx_ring->work_limit = tx_ring->count;
4984 return 0;
4985
4986 err:
4987 vfree(tx_ring->tx_buffer_info);
4988 tx_ring->tx_buffer_info = NULL;
4989 e_err(probe, "Unable to allocate memory for the Tx descriptor ring\n");
4990 return -ENOMEM;
4991 }
4992
4993 /**
4994 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
4995 * @adapter: board private structure
4996 *
4997 * If this function returns with an error, then it's possible one or
4998 * more of the rings is populated (while the rest are not). It is the
4999 * callers duty to clean those orphaned rings.
5000 *
5001 * Return 0 on success, negative on failure
5002 **/
5003 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
5004 {
5005 int i, err = 0;
5006
5007 for (i = 0; i < adapter->num_tx_queues; i++) {
5008 err = ixgbe_setup_tx_resources(adapter, adapter->tx_ring[i]);
5009 if (!err)
5010 continue;
5011 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
5012 break;
5013 }
5014
5015 return err;
5016 }
5017
5018 /**
5019 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
5020 * @adapter: board private structure
5021 * @rx_ring: rx descriptor ring (for a specific queue) to setup
5022 *
5023 * Returns 0 on success, negative on failure
5024 **/
5025 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
5026 struct ixgbe_ring *rx_ring)
5027 {
5028 struct pci_dev *pdev = adapter->pdev;
5029 int size;
5030
5031 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
5032 rx_ring->rx_buffer_info = vmalloc_node(size, adapter->node);
5033 if (!rx_ring->rx_buffer_info)
5034 rx_ring->rx_buffer_info = vmalloc(size);
5035 if (!rx_ring->rx_buffer_info) {
5036 e_err(probe, "vmalloc allocation failed for the Rx "
5037 "descriptor ring\n");
5038 goto alloc_failed;
5039 }
5040 memset(rx_ring->rx_buffer_info, 0, size);
5041
5042 /* Round up to nearest 4K */
5043 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
5044 rx_ring->size = ALIGN(rx_ring->size, 4096);
5045
5046 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
5047 &rx_ring->dma, GFP_KERNEL);
5048
5049 if (!rx_ring->desc) {
5050 e_err(probe, "Memory allocation failed for the Rx "
5051 "descriptor ring\n");
5052 vfree(rx_ring->rx_buffer_info);
5053 goto alloc_failed;
5054 }
5055
5056 rx_ring->next_to_clean = 0;
5057 rx_ring->next_to_use = 0;
5058
5059 return 0;
5060
5061 alloc_failed:
5062 return -ENOMEM;
5063 }
5064
5065 /**
5066 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
5067 * @adapter: board private structure
5068 *
5069 * If this function returns with an error, then it's possible one or
5070 * more of the rings is populated (while the rest are not). It is the
5071 * callers duty to clean those orphaned rings.
5072 *
5073 * Return 0 on success, negative on failure
5074 **/
5075
5076 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
5077 {
5078 int i, err = 0;
5079
5080 for (i = 0; i < adapter->num_rx_queues; i++) {
5081 err = ixgbe_setup_rx_resources(adapter, adapter->rx_ring[i]);
5082 if (!err)
5083 continue;
5084 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
5085 break;
5086 }
5087
5088 return err;
5089 }
5090
5091 /**
5092 * ixgbe_free_tx_resources - Free Tx Resources per Queue
5093 * @adapter: board private structure
5094 * @tx_ring: Tx descriptor ring for a specific queue
5095 *
5096 * Free all transmit software resources
5097 **/
5098 void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
5099 struct ixgbe_ring *tx_ring)
5100 {
5101 struct pci_dev *pdev = adapter->pdev;
5102
5103 ixgbe_clean_tx_ring(adapter, tx_ring);
5104
5105 vfree(tx_ring->tx_buffer_info);
5106 tx_ring->tx_buffer_info = NULL;
5107
5108 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
5109 tx_ring->dma);
5110
5111 tx_ring->desc = NULL;
5112 }
5113
5114 /**
5115 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
5116 * @adapter: board private structure
5117 *
5118 * Free all transmit software resources
5119 **/
5120 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
5121 {
5122 int i;
5123
5124 for (i = 0; i < adapter->num_tx_queues; i++)
5125 if (adapter->tx_ring[i]->desc)
5126 ixgbe_free_tx_resources(adapter, adapter->tx_ring[i]);
5127 }
5128
5129 /**
5130 * ixgbe_free_rx_resources - Free Rx Resources
5131 * @adapter: board private structure
5132 * @rx_ring: ring to clean the resources from
5133 *
5134 * Free all receive software resources
5135 **/
5136 void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
5137 struct ixgbe_ring *rx_ring)
5138 {
5139 struct pci_dev *pdev = adapter->pdev;
5140
5141 ixgbe_clean_rx_ring(adapter, rx_ring);
5142
5143 vfree(rx_ring->rx_buffer_info);
5144 rx_ring->rx_buffer_info = NULL;
5145
5146 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
5147 rx_ring->dma);
5148
5149 rx_ring->desc = NULL;
5150 }
5151
5152 /**
5153 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
5154 * @adapter: board private structure
5155 *
5156 * Free all receive software resources
5157 **/
5158 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
5159 {
5160 int i;
5161
5162 for (i = 0; i < adapter->num_rx_queues; i++)
5163 if (adapter->rx_ring[i]->desc)
5164 ixgbe_free_rx_resources(adapter, adapter->rx_ring[i]);
5165 }
5166
5167 /**
5168 * ixgbe_change_mtu - Change the Maximum Transfer Unit
5169 * @netdev: network interface device structure
5170 * @new_mtu: new value for maximum frame size
5171 *
5172 * Returns 0 on success, negative on failure
5173 **/
5174 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
5175 {
5176 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5177 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5178
5179 /* MTU < 68 is an error and causes problems on some kernels */
5180 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
5181 return -EINVAL;
5182
5183 e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5184 /* must set new MTU before calling down or up */
5185 netdev->mtu = new_mtu;
5186
5187 if (netif_running(netdev))
5188 ixgbe_reinit_locked(adapter);
5189
5190 return 0;
5191 }
5192
5193 /**
5194 * ixgbe_open - Called when a network interface is made active
5195 * @netdev: network interface device structure
5196 *
5197 * Returns 0 on success, negative value on failure
5198 *
5199 * The open entry point is called when a network interface is made
5200 * active by the system (IFF_UP). At this point all resources needed
5201 * for transmit and receive operations are allocated, the interrupt
5202 * handler is registered with the OS, the watchdog timer is started,
5203 * and the stack is notified that the interface is ready.
5204 **/
5205 static int ixgbe_open(struct net_device *netdev)
5206 {
5207 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5208 int err;
5209
5210 /* disallow open during test */
5211 if (test_bit(__IXGBE_TESTING, &adapter->state))
5212 return -EBUSY;
5213
5214 netif_carrier_off(netdev);
5215
5216 /* allocate transmit descriptors */
5217 err = ixgbe_setup_all_tx_resources(adapter);
5218 if (err)
5219 goto err_setup_tx;
5220
5221 /* allocate receive descriptors */
5222 err = ixgbe_setup_all_rx_resources(adapter);
5223 if (err)
5224 goto err_setup_rx;
5225
5226 ixgbe_configure(adapter);
5227
5228 err = ixgbe_request_irq(adapter);
5229 if (err)
5230 goto err_req_irq;
5231
5232 err = ixgbe_up_complete(adapter);
5233 if (err)
5234 goto err_up;
5235
5236 netif_tx_start_all_queues(netdev);
5237
5238 return 0;
5239
5240 err_up:
5241 ixgbe_release_hw_control(adapter);
5242 ixgbe_free_irq(adapter);
5243 err_req_irq:
5244 err_setup_rx:
5245 ixgbe_free_all_rx_resources(adapter);
5246 err_setup_tx:
5247 ixgbe_free_all_tx_resources(adapter);
5248 ixgbe_reset(adapter);
5249
5250 return err;
5251 }
5252
5253 /**
5254 * ixgbe_close - Disables a network interface
5255 * @netdev: network interface device structure
5256 *
5257 * Returns 0, this is not allowed to fail
5258 *
5259 * The close entry point is called when an interface is de-activated
5260 * by the OS. The hardware is still under the drivers control, but
5261 * needs to be disabled. A global MAC reset is issued to stop the
5262 * hardware, and all transmit and receive resources are freed.
5263 **/
5264 static int ixgbe_close(struct net_device *netdev)
5265 {
5266 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5267
5268 ixgbe_down(adapter);
5269 ixgbe_free_irq(adapter);
5270
5271 ixgbe_free_all_tx_resources(adapter);
5272 ixgbe_free_all_rx_resources(adapter);
5273
5274 ixgbe_release_hw_control(adapter);
5275
5276 return 0;
5277 }
5278
5279 #ifdef CONFIG_PM
5280 static int ixgbe_resume(struct pci_dev *pdev)
5281 {
5282 struct net_device *netdev = pci_get_drvdata(pdev);
5283 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5284 u32 err;
5285
5286 pci_set_power_state(pdev, PCI_D0);
5287 pci_restore_state(pdev);
5288 /*
5289 * pci_restore_state clears dev->state_saved so call
5290 * pci_save_state to restore it.
5291 */
5292 pci_save_state(pdev);
5293
5294 err = pci_enable_device_mem(pdev);
5295 if (err) {
5296 e_dev_err("Cannot enable PCI device from suspend\n");
5297 return err;
5298 }
5299 pci_set_master(pdev);
5300
5301 pci_wake_from_d3(pdev, false);
5302
5303 err = ixgbe_init_interrupt_scheme(adapter);
5304 if (err) {
5305 e_dev_err("Cannot initialize interrupts for device\n");
5306 return err;
5307 }
5308
5309 ixgbe_reset(adapter);
5310
5311 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5312
5313 if (netif_running(netdev)) {
5314 err = ixgbe_open(adapter->netdev);
5315 if (err)
5316 return err;
5317 }
5318
5319 netif_device_attach(netdev);
5320
5321 return 0;
5322 }
5323 #endif /* CONFIG_PM */
5324
5325 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
5326 {
5327 struct net_device *netdev = pci_get_drvdata(pdev);
5328 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5329 struct ixgbe_hw *hw = &adapter->hw;
5330 u32 ctrl, fctrl;
5331 u32 wufc = adapter->wol;
5332 #ifdef CONFIG_PM
5333 int retval = 0;
5334 #endif
5335
5336 netif_device_detach(netdev);
5337
5338 if (netif_running(netdev)) {
5339 ixgbe_down(adapter);
5340 ixgbe_free_irq(adapter);
5341 ixgbe_free_all_tx_resources(adapter);
5342 ixgbe_free_all_rx_resources(adapter);
5343 }
5344
5345 #ifdef CONFIG_PM
5346 retval = pci_save_state(pdev);
5347 if (retval)
5348 return retval;
5349
5350 #endif
5351 if (wufc) {
5352 ixgbe_set_rx_mode(netdev);
5353
5354 /* turn on all-multi mode if wake on multicast is enabled */
5355 if (wufc & IXGBE_WUFC_MC) {
5356 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5357 fctrl |= IXGBE_FCTRL_MPE;
5358 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
5359 }
5360
5361 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
5362 ctrl |= IXGBE_CTRL_GIO_DIS;
5363 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
5364
5365 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
5366 } else {
5367 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
5368 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
5369 }
5370
5371 if (wufc && hw->mac.type == ixgbe_mac_82599EB)
5372 pci_wake_from_d3(pdev, true);
5373 else
5374 pci_wake_from_d3(pdev, false);
5375
5376 *enable_wake = !!wufc;
5377
5378 ixgbe_clear_interrupt_scheme(adapter);
5379
5380 ixgbe_release_hw_control(adapter);
5381
5382 pci_disable_device(pdev);
5383
5384 return 0;
5385 }
5386
5387 #ifdef CONFIG_PM
5388 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
5389 {
5390 int retval;
5391 bool wake;
5392
5393 retval = __ixgbe_shutdown(pdev, &wake);
5394 if (retval)
5395 return retval;
5396
5397 if (wake) {
5398 pci_prepare_to_sleep(pdev);
5399 } else {
5400 pci_wake_from_d3(pdev, false);
5401 pci_set_power_state(pdev, PCI_D3hot);
5402 }
5403
5404 return 0;
5405 }
5406 #endif /* CONFIG_PM */
5407
5408 static void ixgbe_shutdown(struct pci_dev *pdev)
5409 {
5410 bool wake;
5411
5412 __ixgbe_shutdown(pdev, &wake);
5413
5414 if (system_state == SYSTEM_POWER_OFF) {
5415 pci_wake_from_d3(pdev, wake);
5416 pci_set_power_state(pdev, PCI_D3hot);
5417 }
5418 }
5419
5420 /**
5421 * ixgbe_update_stats - Update the board statistics counters.
5422 * @adapter: board private structure
5423 **/
5424 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
5425 {
5426 struct net_device *netdev = adapter->netdev;
5427 struct ixgbe_hw *hw = &adapter->hw;
5428 u64 total_mpc = 0;
5429 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
5430 u64 non_eop_descs = 0, restart_queue = 0;
5431 struct ixgbe_hw_stats *hwstats = &adapter->stats;
5432
5433 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5434 test_bit(__IXGBE_RESETTING, &adapter->state))
5435 return;
5436
5437 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
5438 u64 rsc_count = 0;
5439 u64 rsc_flush = 0;
5440 for (i = 0; i < 16; i++)
5441 adapter->hw_rx_no_dma_resources +=
5442 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5443 for (i = 0; i < adapter->num_rx_queues; i++) {
5444 rsc_count += adapter->rx_ring[i]->rsc_count;
5445 rsc_flush += adapter->rx_ring[i]->rsc_flush;
5446 }
5447 adapter->rsc_total_count = rsc_count;
5448 adapter->rsc_total_flush = rsc_flush;
5449 }
5450
5451 /* gather some stats to the adapter struct that are per queue */
5452 for (i = 0; i < adapter->num_tx_queues; i++)
5453 restart_queue += adapter->tx_ring[i]->restart_queue;
5454 adapter->restart_queue = restart_queue;
5455
5456 for (i = 0; i < adapter->num_rx_queues; i++)
5457 non_eop_descs += adapter->rx_ring[i]->non_eop_descs;
5458 adapter->non_eop_descs = non_eop_descs;
5459
5460 hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
5461 for (i = 0; i < 8; i++) {
5462 /* for packet buffers not used, the register should read 0 */
5463 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
5464 missed_rx += mpc;
5465 hwstats->mpc[i] += mpc;
5466 total_mpc += hwstats->mpc[i];
5467 if (hw->mac.type == ixgbe_mac_82598EB)
5468 hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
5469 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
5470 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
5471 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
5472 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
5473 if (hw->mac.type == ixgbe_mac_82599EB) {
5474 hwstats->pxonrxc[i] +=
5475 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
5476 hwstats->pxoffrxc[i] +=
5477 IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
5478 hwstats->qprdc[i] += IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5479 } else {
5480 hwstats->pxonrxc[i] +=
5481 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
5482 hwstats->pxoffrxc[i] +=
5483 IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
5484 }
5485 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
5486 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
5487 }
5488 hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
5489 /* work around hardware counting issue */
5490 hwstats->gprc -= missed_rx;
5491
5492 /* 82598 hardware only has a 32 bit counter in the high register */
5493 if (hw->mac.type == ixgbe_mac_82599EB) {
5494 u64 tmp;
5495 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
5496 tmp = IXGBE_READ_REG(hw, IXGBE_GORCH) & 0xF;
5497 /* 4 high bits of GORC */
5498 hwstats->gorc += (tmp << 32);
5499 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
5500 tmp = IXGBE_READ_REG(hw, IXGBE_GOTCH) & 0xF;
5501 /* 4 high bits of GOTC */
5502 hwstats->gotc += (tmp << 32);
5503 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
5504 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
5505 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
5506 hwstats->lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
5507 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
5508 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
5509 #ifdef IXGBE_FCOE
5510 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
5511 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
5512 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
5513 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
5514 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
5515 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
5516 #endif /* IXGBE_FCOE */
5517 } else {
5518 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
5519 hwstats->lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
5520 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
5521 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
5522 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
5523 }
5524 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
5525 hwstats->bprc += bprc;
5526 hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
5527 if (hw->mac.type == ixgbe_mac_82598EB)
5528 hwstats->mprc -= bprc;
5529 hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
5530 hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
5531 hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
5532 hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
5533 hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
5534 hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
5535 hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
5536 hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
5537 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
5538 hwstats->lxontxc += lxon;
5539 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
5540 hwstats->lxofftxc += lxoff;
5541 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5542 hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
5543 hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
5544 /*
5545 * 82598 errata - tx of flow control packets is included in tx counters
5546 */
5547 xon_off_tot = lxon + lxoff;
5548 hwstats->gptc -= xon_off_tot;
5549 hwstats->mptc -= xon_off_tot;
5550 hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
5551 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5552 hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
5553 hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
5554 hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
5555 hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
5556 hwstats->ptc64 -= xon_off_tot;
5557 hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
5558 hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
5559 hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
5560 hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
5561 hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
5562 hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
5563
5564 /* Fill out the OS statistics structure */
5565 netdev->stats.multicast = hwstats->mprc;
5566
5567 /* Rx Errors */
5568 netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
5569 netdev->stats.rx_dropped = 0;
5570 netdev->stats.rx_length_errors = hwstats->rlec;
5571 netdev->stats.rx_crc_errors = hwstats->crcerrs;
5572 netdev->stats.rx_missed_errors = total_mpc;
5573 }
5574
5575 /**
5576 * ixgbe_watchdog - Timer Call-back
5577 * @data: pointer to adapter cast into an unsigned long
5578 **/
5579 static void ixgbe_watchdog(unsigned long data)
5580 {
5581 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
5582 struct ixgbe_hw *hw = &adapter->hw;
5583 u64 eics = 0;
5584 int i;
5585
5586 /*
5587 * Do the watchdog outside of interrupt context due to the lovely
5588 * delays that some of the newer hardware requires
5589 */
5590
5591 if (test_bit(__IXGBE_DOWN, &adapter->state))
5592 goto watchdog_short_circuit;
5593
5594 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
5595 /*
5596 * for legacy and MSI interrupts don't set any bits
5597 * that are enabled for EIAM, because this operation
5598 * would set *both* EIMS and EICS for any bit in EIAM
5599 */
5600 IXGBE_WRITE_REG(hw, IXGBE_EICS,
5601 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
5602 goto watchdog_reschedule;
5603 }
5604
5605 /* get one bit for every active tx/rx interrupt vector */
5606 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
5607 struct ixgbe_q_vector *qv = adapter->q_vector[i];
5608 if (qv->rxr_count || qv->txr_count)
5609 eics |= ((u64)1 << i);
5610 }
5611
5612 /* Cause software interrupt to ensure rx rings are cleaned */
5613 ixgbe_irq_rearm_queues(adapter, eics);
5614
5615 watchdog_reschedule:
5616 /* Reset the timer */
5617 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
5618
5619 watchdog_short_circuit:
5620 schedule_work(&adapter->watchdog_task);
5621 }
5622
5623 /**
5624 * ixgbe_multispeed_fiber_task - worker thread to configure multispeed fiber
5625 * @work: pointer to work_struct containing our data
5626 **/
5627 static void ixgbe_multispeed_fiber_task(struct work_struct *work)
5628 {
5629 struct ixgbe_adapter *adapter = container_of(work,
5630 struct ixgbe_adapter,
5631 multispeed_fiber_task);
5632 struct ixgbe_hw *hw = &adapter->hw;
5633 u32 autoneg;
5634 bool negotiation;
5635
5636 adapter->flags |= IXGBE_FLAG_IN_SFP_LINK_TASK;
5637 autoneg = hw->phy.autoneg_advertised;
5638 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
5639 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
5640 hw->mac.autotry_restart = false;
5641 if (hw->mac.ops.setup_link)
5642 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
5643 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
5644 adapter->flags &= ~IXGBE_FLAG_IN_SFP_LINK_TASK;
5645 }
5646
5647 /**
5648 * ixgbe_sfp_config_module_task - worker thread to configure a new SFP+ module
5649 * @work: pointer to work_struct containing our data
5650 **/
5651 static void ixgbe_sfp_config_module_task(struct work_struct *work)
5652 {
5653 struct ixgbe_adapter *adapter = container_of(work,
5654 struct ixgbe_adapter,
5655 sfp_config_module_task);
5656 struct ixgbe_hw *hw = &adapter->hw;
5657 u32 err;
5658
5659 adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
5660
5661 /* Time for electrical oscillations to settle down */
5662 msleep(100);
5663 err = hw->phy.ops.identify_sfp(hw);
5664
5665 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5666 e_dev_err("failed to initialize because an unsupported SFP+ "
5667 "module type was detected.\n");
5668 e_dev_err("Reload the driver after installing a supported "
5669 "module.\n");
5670 unregister_netdev(adapter->netdev);
5671 return;
5672 }
5673 hw->mac.ops.setup_sfp(hw);
5674
5675 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
5676 /* This will also work for DA Twinax connections */
5677 schedule_work(&adapter->multispeed_fiber_task);
5678 adapter->flags &= ~IXGBE_FLAG_IN_SFP_MOD_TASK;
5679 }
5680
5681 /**
5682 * ixgbe_fdir_reinit_task - worker thread to reinit FDIR filter table
5683 * @work: pointer to work_struct containing our data
5684 **/
5685 static void ixgbe_fdir_reinit_task(struct work_struct *work)
5686 {
5687 struct ixgbe_adapter *adapter = container_of(work,
5688 struct ixgbe_adapter,
5689 fdir_reinit_task);
5690 struct ixgbe_hw *hw = &adapter->hw;
5691 int i;
5692
5693 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
5694 for (i = 0; i < adapter->num_tx_queues; i++)
5695 set_bit(__IXGBE_FDIR_INIT_DONE,
5696 &(adapter->tx_ring[i]->reinit_state));
5697 } else {
5698 e_err(probe, "failed to finish FDIR re-initialization, "
5699 "ignored adding FDIR ATR filters\n");
5700 }
5701 /* Done FDIR Re-initialization, enable transmits */
5702 netif_tx_start_all_queues(adapter->netdev);
5703 }
5704
5705 static DEFINE_MUTEX(ixgbe_watchdog_lock);
5706
5707 /**
5708 * ixgbe_watchdog_task - worker thread to bring link up
5709 * @work: pointer to work_struct containing our data
5710 **/
5711 static void ixgbe_watchdog_task(struct work_struct *work)
5712 {
5713 struct ixgbe_adapter *adapter = container_of(work,
5714 struct ixgbe_adapter,
5715 watchdog_task);
5716 struct net_device *netdev = adapter->netdev;
5717 struct ixgbe_hw *hw = &adapter->hw;
5718 u32 link_speed;
5719 bool link_up;
5720 int i;
5721 struct ixgbe_ring *tx_ring;
5722 int some_tx_pending = 0;
5723
5724 mutex_lock(&ixgbe_watchdog_lock);
5725
5726 link_up = adapter->link_up;
5727 link_speed = adapter->link_speed;
5728
5729 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
5730 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
5731 if (link_up) {
5732 #ifdef CONFIG_DCB
5733 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5734 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
5735 hw->mac.ops.fc_enable(hw, i);
5736 } else {
5737 hw->mac.ops.fc_enable(hw, 0);
5738 }
5739 #else
5740 hw->mac.ops.fc_enable(hw, 0);
5741 #endif
5742 }
5743
5744 if (link_up ||
5745 time_after(jiffies, (adapter->link_check_timeout +
5746 IXGBE_TRY_LINK_TIMEOUT))) {
5747 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5748 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
5749 }
5750 adapter->link_up = link_up;
5751 adapter->link_speed = link_speed;
5752 }
5753
5754 if (link_up) {
5755 if (!netif_carrier_ok(netdev)) {
5756 bool flow_rx, flow_tx;
5757
5758 if (hw->mac.type == ixgbe_mac_82599EB) {
5759 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
5760 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
5761 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
5762 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
5763 } else {
5764 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5765 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
5766 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
5767 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
5768 }
5769
5770 e_info(drv, "NIC Link is Up %s, Flow Control: %s\n",
5771 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
5772 "10 Gbps" :
5773 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
5774 "1 Gbps" : "unknown speed")),
5775 ((flow_rx && flow_tx) ? "RX/TX" :
5776 (flow_rx ? "RX" :
5777 (flow_tx ? "TX" : "None"))));
5778
5779 netif_carrier_on(netdev);
5780 } else {
5781 /* Force detection of hung controller */
5782 adapter->detect_tx_hung = true;
5783 }
5784 } else {
5785 adapter->link_up = false;
5786 adapter->link_speed = 0;
5787 if (netif_carrier_ok(netdev)) {
5788 e_info(drv, "NIC Link is Down\n");
5789 netif_carrier_off(netdev);
5790 }
5791 }
5792
5793 if (!netif_carrier_ok(netdev)) {
5794 for (i = 0; i < adapter->num_tx_queues; i++) {
5795 tx_ring = adapter->tx_ring[i];
5796 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
5797 some_tx_pending = 1;
5798 break;
5799 }
5800 }
5801
5802 if (some_tx_pending) {
5803 /* We've lost link, so the controller stops DMA,
5804 * but we've got queued Tx work that's never going
5805 * to get done, so reset controller to flush Tx.
5806 * (Do the reset outside of interrupt context).
5807 */
5808 schedule_work(&adapter->reset_task);
5809 }
5810 }
5811
5812 ixgbe_update_stats(adapter);
5813 mutex_unlock(&ixgbe_watchdog_lock);
5814 }
5815
5816 static int ixgbe_tso(struct ixgbe_adapter *adapter,
5817 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
5818 u32 tx_flags, u8 *hdr_len)
5819 {
5820 struct ixgbe_adv_tx_context_desc *context_desc;
5821 unsigned int i;
5822 int err;
5823 struct ixgbe_tx_buffer *tx_buffer_info;
5824 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
5825 u32 mss_l4len_idx, l4len;
5826
5827 if (skb_is_gso(skb)) {
5828 if (skb_header_cloned(skb)) {
5829 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
5830 if (err)
5831 return err;
5832 }
5833 l4len = tcp_hdrlen(skb);
5834 *hdr_len += l4len;
5835
5836 if (skb->protocol == htons(ETH_P_IP)) {
5837 struct iphdr *iph = ip_hdr(skb);
5838 iph->tot_len = 0;
5839 iph->check = 0;
5840 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
5841 iph->daddr, 0,
5842 IPPROTO_TCP,
5843 0);
5844 } else if (skb_is_gso_v6(skb)) {
5845 ipv6_hdr(skb)->payload_len = 0;
5846 tcp_hdr(skb)->check =
5847 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
5848 &ipv6_hdr(skb)->daddr,
5849 0, IPPROTO_TCP, 0);
5850 }
5851
5852 i = tx_ring->next_to_use;
5853
5854 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5855 context_desc = IXGBE_TX_CTXTDESC_ADV(tx_ring, i);
5856
5857 /* VLAN MACLEN IPLEN */
5858 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5859 vlan_macip_lens |=
5860 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
5861 vlan_macip_lens |= ((skb_network_offset(skb)) <<
5862 IXGBE_ADVTXD_MACLEN_SHIFT);
5863 *hdr_len += skb_network_offset(skb);
5864 vlan_macip_lens |=
5865 (skb_transport_header(skb) - skb_network_header(skb));
5866 *hdr_len +=
5867 (skb_transport_header(skb) - skb_network_header(skb));
5868 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
5869 context_desc->seqnum_seed = 0;
5870
5871 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
5872 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
5873 IXGBE_ADVTXD_DTYP_CTXT);
5874
5875 if (skb->protocol == htons(ETH_P_IP))
5876 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
5877 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
5878 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
5879
5880 /* MSS L4LEN IDX */
5881 mss_l4len_idx =
5882 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
5883 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
5884 /* use index 1 for TSO */
5885 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
5886 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
5887
5888 tx_buffer_info->time_stamp = jiffies;
5889 tx_buffer_info->next_to_watch = i;
5890
5891 i++;
5892 if (i == tx_ring->count)
5893 i = 0;
5894 tx_ring->next_to_use = i;
5895
5896 return true;
5897 }
5898 return false;
5899 }
5900
5901 static u32 ixgbe_psum(struct ixgbe_adapter *adapter, struct sk_buff *skb)
5902 {
5903 u32 rtn = 0;
5904 __be16 protocol;
5905
5906 if (skb->protocol == cpu_to_be16(ETH_P_8021Q))
5907 protocol = ((const struct vlan_ethhdr *)skb->data)->
5908 h_vlan_encapsulated_proto;
5909 else
5910 protocol = skb->protocol;
5911
5912 switch (protocol) {
5913 case cpu_to_be16(ETH_P_IP):
5914 rtn |= IXGBE_ADVTXD_TUCMD_IPV4;
5915 switch (ip_hdr(skb)->protocol) {
5916 case IPPROTO_TCP:
5917 rtn |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
5918 break;
5919 case IPPROTO_SCTP:
5920 rtn |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
5921 break;
5922 }
5923 break;
5924 case cpu_to_be16(ETH_P_IPV6):
5925 /* XXX what about other V6 headers?? */
5926 switch (ipv6_hdr(skb)->nexthdr) {
5927 case IPPROTO_TCP:
5928 rtn |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
5929 break;
5930 case IPPROTO_SCTP:
5931 rtn |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
5932 break;
5933 }
5934 break;
5935 default:
5936 if (unlikely(net_ratelimit()))
5937 e_warn(probe, "partial checksum but proto=%x!\n",
5938 skb->protocol);
5939 break;
5940 }
5941
5942 return rtn;
5943 }
5944
5945 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
5946 struct ixgbe_ring *tx_ring,
5947 struct sk_buff *skb, u32 tx_flags)
5948 {
5949 struct ixgbe_adv_tx_context_desc *context_desc;
5950 unsigned int i;
5951 struct ixgbe_tx_buffer *tx_buffer_info;
5952 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
5953
5954 if (skb->ip_summed == CHECKSUM_PARTIAL ||
5955 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
5956 i = tx_ring->next_to_use;
5957 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5958 context_desc = IXGBE_TX_CTXTDESC_ADV(tx_ring, i);
5959
5960 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5961 vlan_macip_lens |=
5962 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
5963 vlan_macip_lens |= (skb_network_offset(skb) <<
5964 IXGBE_ADVTXD_MACLEN_SHIFT);
5965 if (skb->ip_summed == CHECKSUM_PARTIAL)
5966 vlan_macip_lens |= (skb_transport_header(skb) -
5967 skb_network_header(skb));
5968
5969 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
5970 context_desc->seqnum_seed = 0;
5971
5972 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
5973 IXGBE_ADVTXD_DTYP_CTXT);
5974
5975 if (skb->ip_summed == CHECKSUM_PARTIAL)
5976 type_tucmd_mlhl |= ixgbe_psum(adapter, skb);
5977
5978 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
5979 /* use index zero for tx checksum offload */
5980 context_desc->mss_l4len_idx = 0;
5981
5982 tx_buffer_info->time_stamp = jiffies;
5983 tx_buffer_info->next_to_watch = i;
5984
5985 i++;
5986 if (i == tx_ring->count)
5987 i = 0;
5988 tx_ring->next_to_use = i;
5989
5990 return true;
5991 }
5992
5993 return false;
5994 }
5995
5996 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
5997 struct ixgbe_ring *tx_ring,
5998 struct sk_buff *skb, u32 tx_flags,
5999 unsigned int first)
6000 {
6001 struct pci_dev *pdev = adapter->pdev;
6002 struct ixgbe_tx_buffer *tx_buffer_info;
6003 unsigned int len;
6004 unsigned int total = skb->len;
6005 unsigned int offset = 0, size, count = 0, i;
6006 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
6007 unsigned int f;
6008
6009 i = tx_ring->next_to_use;
6010
6011 if (tx_flags & IXGBE_TX_FLAGS_FCOE)
6012 /* excluding fcoe_crc_eof for FCoE */
6013 total -= sizeof(struct fcoe_crc_eof);
6014
6015 len = min(skb_headlen(skb), total);
6016 while (len) {
6017 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6018 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
6019
6020 tx_buffer_info->length = size;
6021 tx_buffer_info->mapped_as_page = false;
6022 tx_buffer_info->dma = dma_map_single(&pdev->dev,
6023 skb->data + offset,
6024 size, DMA_TO_DEVICE);
6025 if (dma_mapping_error(&pdev->dev, tx_buffer_info->dma))
6026 goto dma_error;
6027 tx_buffer_info->time_stamp = jiffies;
6028 tx_buffer_info->next_to_watch = i;
6029
6030 len -= size;
6031 total -= size;
6032 offset += size;
6033 count++;
6034
6035 if (len) {
6036 i++;
6037 if (i == tx_ring->count)
6038 i = 0;
6039 }
6040 }
6041
6042 for (f = 0; f < nr_frags; f++) {
6043 struct skb_frag_struct *frag;
6044
6045 frag = &skb_shinfo(skb)->frags[f];
6046 len = min((unsigned int)frag->size, total);
6047 offset = frag->page_offset;
6048
6049 while (len) {
6050 i++;
6051 if (i == tx_ring->count)
6052 i = 0;
6053
6054 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6055 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
6056
6057 tx_buffer_info->length = size;
6058 tx_buffer_info->dma = dma_map_page(&adapter->pdev->dev,
6059 frag->page,
6060 offset, size,
6061 DMA_TO_DEVICE);
6062 tx_buffer_info->mapped_as_page = true;
6063 if (dma_mapping_error(&pdev->dev, tx_buffer_info->dma))
6064 goto dma_error;
6065 tx_buffer_info->time_stamp = jiffies;
6066 tx_buffer_info->next_to_watch = i;
6067
6068 len -= size;
6069 total -= size;
6070 offset += size;
6071 count++;
6072 }
6073 if (total == 0)
6074 break;
6075 }
6076
6077 tx_ring->tx_buffer_info[i].skb = skb;
6078 tx_ring->tx_buffer_info[first].next_to_watch = i;
6079
6080 return count;
6081
6082 dma_error:
6083 e_dev_err("TX DMA map failed\n");
6084
6085 /* clear timestamp and dma mappings for failed tx_buffer_info map */
6086 tx_buffer_info->dma = 0;
6087 tx_buffer_info->time_stamp = 0;
6088 tx_buffer_info->next_to_watch = 0;
6089 if (count)
6090 count--;
6091
6092 /* clear timestamp and dma mappings for remaining portion of packet */
6093 while (count--) {
6094 if (i == 0)
6095 i += tx_ring->count;
6096 i--;
6097 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6098 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
6099 }
6100
6101 return 0;
6102 }
6103
6104 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
6105 struct ixgbe_ring *tx_ring,
6106 int tx_flags, int count, u32 paylen, u8 hdr_len)
6107 {
6108 union ixgbe_adv_tx_desc *tx_desc = NULL;
6109 struct ixgbe_tx_buffer *tx_buffer_info;
6110 u32 olinfo_status = 0, cmd_type_len = 0;
6111 unsigned int i;
6112 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
6113
6114 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
6115
6116 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
6117
6118 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
6119 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
6120
6121 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
6122 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6123
6124 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6125 IXGBE_ADVTXD_POPTS_SHIFT;
6126
6127 /* use index 1 context for tso */
6128 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6129 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
6130 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
6131 IXGBE_ADVTXD_POPTS_SHIFT;
6132
6133 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
6134 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6135 IXGBE_ADVTXD_POPTS_SHIFT;
6136
6137 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6138 olinfo_status |= IXGBE_ADVTXD_CC;
6139 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6140 if (tx_flags & IXGBE_TX_FLAGS_FSO)
6141 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6142 }
6143
6144 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
6145
6146 i = tx_ring->next_to_use;
6147 while (count--) {
6148 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6149 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
6150 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
6151 tx_desc->read.cmd_type_len =
6152 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
6153 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
6154 i++;
6155 if (i == tx_ring->count)
6156 i = 0;
6157 }
6158
6159 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
6160
6161 /*
6162 * Force memory writes to complete before letting h/w
6163 * know there are new descriptors to fetch. (Only
6164 * applicable for weak-ordered memory model archs,
6165 * such as IA-64).
6166 */
6167 wmb();
6168
6169 tx_ring->next_to_use = i;
6170 writel(i, adapter->hw.hw_addr + tx_ring->tail);
6171 }
6172
6173 static void ixgbe_atr(struct ixgbe_adapter *adapter, struct sk_buff *skb,
6174 int queue, u32 tx_flags)
6175 {
6176 struct ixgbe_atr_input atr_input;
6177 struct tcphdr *th;
6178 struct iphdr *iph = ip_hdr(skb);
6179 struct ethhdr *eth = (struct ethhdr *)skb->data;
6180 u16 vlan_id, src_port, dst_port, flex_bytes;
6181 u32 src_ipv4_addr, dst_ipv4_addr;
6182 u8 l4type = 0;
6183
6184 /* Right now, we support IPv4 only */
6185 if (skb->protocol != htons(ETH_P_IP))
6186 return;
6187 /* check if we're UDP or TCP */
6188 if (iph->protocol == IPPROTO_TCP) {
6189 th = tcp_hdr(skb);
6190 src_port = th->source;
6191 dst_port = th->dest;
6192 l4type |= IXGBE_ATR_L4TYPE_TCP;
6193 /* l4type IPv4 type is 0, no need to assign */
6194 } else {
6195 /* Unsupported L4 header, just bail here */
6196 return;
6197 }
6198
6199 memset(&atr_input, 0, sizeof(struct ixgbe_atr_input));
6200
6201 vlan_id = (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK) >>
6202 IXGBE_TX_FLAGS_VLAN_SHIFT;
6203 src_ipv4_addr = iph->saddr;
6204 dst_ipv4_addr = iph->daddr;
6205 flex_bytes = eth->h_proto;
6206
6207 ixgbe_atr_set_vlan_id_82599(&atr_input, vlan_id);
6208 ixgbe_atr_set_src_port_82599(&atr_input, dst_port);
6209 ixgbe_atr_set_dst_port_82599(&atr_input, src_port);
6210 ixgbe_atr_set_flex_byte_82599(&atr_input, flex_bytes);
6211 ixgbe_atr_set_l4type_82599(&atr_input, l4type);
6212 /* src and dst are inverted, think how the receiver sees them */
6213 ixgbe_atr_set_src_ipv4_82599(&atr_input, dst_ipv4_addr);
6214 ixgbe_atr_set_dst_ipv4_82599(&atr_input, src_ipv4_addr);
6215
6216 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
6217 ixgbe_fdir_add_signature_filter_82599(&adapter->hw, &atr_input, queue);
6218 }
6219
6220 static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
6221 struct ixgbe_ring *tx_ring, int size)
6222 {
6223 netif_stop_subqueue(netdev, tx_ring->queue_index);
6224 /* Herbert's original patch had:
6225 * smp_mb__after_netif_stop_queue();
6226 * but since that doesn't exist yet, just open code it. */
6227 smp_mb();
6228
6229 /* We need to check again in a case another CPU has just
6230 * made room available. */
6231 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
6232 return -EBUSY;
6233
6234 /* A reprieve! - use start_queue because it doesn't call schedule */
6235 netif_start_subqueue(netdev, tx_ring->queue_index);
6236 ++tx_ring->restart_queue;
6237 return 0;
6238 }
6239
6240 static int ixgbe_maybe_stop_tx(struct net_device *netdev,
6241 struct ixgbe_ring *tx_ring, int size)
6242 {
6243 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
6244 return 0;
6245 return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
6246 }
6247
6248 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
6249 {
6250 struct ixgbe_adapter *adapter = netdev_priv(dev);
6251 int txq = smp_processor_id();
6252
6253 #ifdef IXGBE_FCOE
6254 if ((skb->protocol == htons(ETH_P_FCOE)) ||
6255 (skb->protocol == htons(ETH_P_FIP))) {
6256 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
6257 txq &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
6258 txq += adapter->ring_feature[RING_F_FCOE].mask;
6259 return txq;
6260 #ifdef CONFIG_IXGBE_DCB
6261 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6262 txq = adapter->fcoe.up;
6263 return txq;
6264 #endif
6265 }
6266 }
6267 #endif
6268
6269 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
6270 while (unlikely(txq >= dev->real_num_tx_queues))
6271 txq -= dev->real_num_tx_queues;
6272 return txq;
6273 }
6274
6275 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6276 if (skb->priority == TC_PRIO_CONTROL)
6277 txq = adapter->ring_feature[RING_F_DCB].indices-1;
6278 else
6279 txq = (skb->vlan_tci & IXGBE_TX_FLAGS_VLAN_PRIO_MASK)
6280 >> 13;
6281 return txq;
6282 }
6283
6284 return skb_tx_hash(dev, skb);
6285 }
6286
6287 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb, struct net_device *netdev,
6288 struct ixgbe_adapter *adapter,
6289 struct ixgbe_ring *tx_ring)
6290 {
6291 struct netdev_queue *txq;
6292 unsigned int first;
6293 unsigned int tx_flags = 0;
6294 u8 hdr_len = 0;
6295 int tso;
6296 int count = 0;
6297 unsigned int f;
6298
6299 if (vlan_tx_tag_present(skb)) {
6300 tx_flags |= vlan_tx_tag_get(skb);
6301 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6302 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
6303 tx_flags |= ((skb->queue_mapping & 0x7) << 13);
6304 }
6305 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6306 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6307 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED &&
6308 skb->priority != TC_PRIO_CONTROL) {
6309 tx_flags |= ((skb->queue_mapping & 0x7) << 13);
6310 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6311 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6312 }
6313
6314 #ifdef IXGBE_FCOE
6315 /* for FCoE with DCB, we force the priority to what
6316 * was specified by the switch */
6317 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED &&
6318 (skb->protocol == htons(ETH_P_FCOE) ||
6319 skb->protocol == htons(ETH_P_FIP))) {
6320 #ifdef CONFIG_IXGBE_DCB
6321 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6322 tx_flags &= ~(IXGBE_TX_FLAGS_VLAN_PRIO_MASK
6323 << IXGBE_TX_FLAGS_VLAN_SHIFT);
6324 tx_flags |= ((adapter->fcoe.up << 13)
6325 << IXGBE_TX_FLAGS_VLAN_SHIFT);
6326 }
6327 #endif
6328 /* flag for FCoE offloads */
6329 if (skb->protocol == htons(ETH_P_FCOE))
6330 tx_flags |= IXGBE_TX_FLAGS_FCOE;
6331 }
6332 #endif
6333
6334 /* four things can cause us to need a context descriptor */
6335 if (skb_is_gso(skb) ||
6336 (skb->ip_summed == CHECKSUM_PARTIAL) ||
6337 (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
6338 (tx_flags & IXGBE_TX_FLAGS_FCOE))
6339 count++;
6340
6341 count += TXD_USE_COUNT(skb_headlen(skb));
6342 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
6343 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
6344
6345 if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
6346 adapter->tx_busy++;
6347 return NETDEV_TX_BUSY;
6348 }
6349
6350 first = tx_ring->next_to_use;
6351 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6352 #ifdef IXGBE_FCOE
6353 /* setup tx offload for FCoE */
6354 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
6355 if (tso < 0) {
6356 dev_kfree_skb_any(skb);
6357 return NETDEV_TX_OK;
6358 }
6359 if (tso)
6360 tx_flags |= IXGBE_TX_FLAGS_FSO;
6361 #endif /* IXGBE_FCOE */
6362 } else {
6363 if (skb->protocol == htons(ETH_P_IP))
6364 tx_flags |= IXGBE_TX_FLAGS_IPV4;
6365 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
6366 if (tso < 0) {
6367 dev_kfree_skb_any(skb);
6368 return NETDEV_TX_OK;
6369 }
6370
6371 if (tso)
6372 tx_flags |= IXGBE_TX_FLAGS_TSO;
6373 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
6374 (skb->ip_summed == CHECKSUM_PARTIAL))
6375 tx_flags |= IXGBE_TX_FLAGS_CSUM;
6376 }
6377
6378 count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first);
6379 if (count) {
6380 /* add the ATR filter if ATR is on */
6381 if (tx_ring->atr_sample_rate) {
6382 ++tx_ring->atr_count;
6383 if ((tx_ring->atr_count >= tx_ring->atr_sample_rate) &&
6384 test_bit(__IXGBE_FDIR_INIT_DONE,
6385 &tx_ring->reinit_state)) {
6386 ixgbe_atr(adapter, skb, tx_ring->queue_index,
6387 tx_flags);
6388 tx_ring->atr_count = 0;
6389 }
6390 }
6391 txq = netdev_get_tx_queue(netdev, tx_ring->queue_index);
6392 txq->tx_bytes += skb->len;
6393 txq->tx_packets++;
6394 ixgbe_tx_queue(adapter, tx_ring, tx_flags, count, skb->len,
6395 hdr_len);
6396 ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
6397
6398 } else {
6399 dev_kfree_skb_any(skb);
6400 tx_ring->tx_buffer_info[first].time_stamp = 0;
6401 tx_ring->next_to_use = first;
6402 }
6403
6404 return NETDEV_TX_OK;
6405 }
6406
6407 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
6408 {
6409 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6410 struct ixgbe_ring *tx_ring;
6411
6412 tx_ring = adapter->tx_ring[skb->queue_mapping];
6413 return ixgbe_xmit_frame_ring(skb, netdev, adapter, tx_ring);
6414 }
6415
6416 /**
6417 * ixgbe_set_mac - Change the Ethernet Address of the NIC
6418 * @netdev: network interface device structure
6419 * @p: pointer to an address structure
6420 *
6421 * Returns 0 on success, negative on failure
6422 **/
6423 static int ixgbe_set_mac(struct net_device *netdev, void *p)
6424 {
6425 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6426 struct ixgbe_hw *hw = &adapter->hw;
6427 struct sockaddr *addr = p;
6428
6429 if (!is_valid_ether_addr(addr->sa_data))
6430 return -EADDRNOTAVAIL;
6431
6432 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
6433 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
6434
6435 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
6436 IXGBE_RAH_AV);
6437
6438 return 0;
6439 }
6440
6441 static int
6442 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
6443 {
6444 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6445 struct ixgbe_hw *hw = &adapter->hw;
6446 u16 value;
6447 int rc;
6448
6449 if (prtad != hw->phy.mdio.prtad)
6450 return -EINVAL;
6451 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
6452 if (!rc)
6453 rc = value;
6454 return rc;
6455 }
6456
6457 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
6458 u16 addr, u16 value)
6459 {
6460 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6461 struct ixgbe_hw *hw = &adapter->hw;
6462
6463 if (prtad != hw->phy.mdio.prtad)
6464 return -EINVAL;
6465 return hw->phy.ops.write_reg(hw, addr, devad, value);
6466 }
6467
6468 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
6469 {
6470 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6471
6472 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
6473 }
6474
6475 /**
6476 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
6477 * netdev->dev_addrs
6478 * @netdev: network interface device structure
6479 *
6480 * Returns non-zero on failure
6481 **/
6482 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
6483 {
6484 int err = 0;
6485 struct ixgbe_adapter *adapter = netdev_priv(dev);
6486 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6487
6488 if (is_valid_ether_addr(mac->san_addr)) {
6489 rtnl_lock();
6490 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6491 rtnl_unlock();
6492 }
6493 return err;
6494 }
6495
6496 /**
6497 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
6498 * netdev->dev_addrs
6499 * @netdev: network interface device structure
6500 *
6501 * Returns non-zero on failure
6502 **/
6503 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
6504 {
6505 int err = 0;
6506 struct ixgbe_adapter *adapter = netdev_priv(dev);
6507 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6508
6509 if (is_valid_ether_addr(mac->san_addr)) {
6510 rtnl_lock();
6511 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6512 rtnl_unlock();
6513 }
6514 return err;
6515 }
6516
6517 #ifdef CONFIG_NET_POLL_CONTROLLER
6518 /*
6519 * Polling 'interrupt' - used by things like netconsole to send skbs
6520 * without having to re-enable interrupts. It's not called while
6521 * the interrupt routine is executing.
6522 */
6523 static void ixgbe_netpoll(struct net_device *netdev)
6524 {
6525 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6526 int i;
6527
6528 /* if interface is down do nothing */
6529 if (test_bit(__IXGBE_DOWN, &adapter->state))
6530 return;
6531
6532 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
6533 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
6534 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
6535 for (i = 0; i < num_q_vectors; i++) {
6536 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
6537 ixgbe_msix_clean_many(0, q_vector);
6538 }
6539 } else {
6540 ixgbe_intr(adapter->pdev->irq, netdev);
6541 }
6542 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
6543 }
6544 #endif
6545
6546 static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
6547 struct rtnl_link_stats64 *stats)
6548 {
6549 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6550 int i;
6551
6552 /* accurate rx/tx bytes/packets stats */
6553 dev_txq_stats_fold(netdev, stats);
6554 for (i = 0; i < adapter->num_rx_queues; i++) {
6555 struct ixgbe_ring *ring = adapter->rx_ring[i];
6556 u64 bytes, packets;
6557 unsigned int start;
6558
6559 do {
6560 start = u64_stats_fetch_begin_bh(&ring->syncp);
6561 packets = ring->stats.packets;
6562 bytes = ring->stats.bytes;
6563 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
6564 stats->rx_packets += packets;
6565 stats->rx_bytes += bytes;
6566 }
6567
6568 /* following stats updated by ixgbe_watchdog_task() */
6569 stats->multicast = netdev->stats.multicast;
6570 stats->rx_errors = netdev->stats.rx_errors;
6571 stats->rx_length_errors = netdev->stats.rx_length_errors;
6572 stats->rx_crc_errors = netdev->stats.rx_crc_errors;
6573 stats->rx_missed_errors = netdev->stats.rx_missed_errors;
6574 return stats;
6575 }
6576
6577
6578 static const struct net_device_ops ixgbe_netdev_ops = {
6579 .ndo_open = ixgbe_open,
6580 .ndo_stop = ixgbe_close,
6581 .ndo_start_xmit = ixgbe_xmit_frame,
6582 .ndo_select_queue = ixgbe_select_queue,
6583 .ndo_set_rx_mode = ixgbe_set_rx_mode,
6584 .ndo_set_multicast_list = ixgbe_set_rx_mode,
6585 .ndo_validate_addr = eth_validate_addr,
6586 .ndo_set_mac_address = ixgbe_set_mac,
6587 .ndo_change_mtu = ixgbe_change_mtu,
6588 .ndo_tx_timeout = ixgbe_tx_timeout,
6589 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
6590 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
6591 .ndo_do_ioctl = ixgbe_ioctl,
6592 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
6593 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
6594 .ndo_set_vf_tx_rate = ixgbe_ndo_set_vf_bw,
6595 .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
6596 .ndo_get_stats64 = ixgbe_get_stats64,
6597 #ifdef CONFIG_NET_POLL_CONTROLLER
6598 .ndo_poll_controller = ixgbe_netpoll,
6599 #endif
6600 #ifdef IXGBE_FCOE
6601 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
6602 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
6603 .ndo_fcoe_enable = ixgbe_fcoe_enable,
6604 .ndo_fcoe_disable = ixgbe_fcoe_disable,
6605 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
6606 #endif /* IXGBE_FCOE */
6607 };
6608
6609 static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter,
6610 const struct ixgbe_info *ii)
6611 {
6612 #ifdef CONFIG_PCI_IOV
6613 struct ixgbe_hw *hw = &adapter->hw;
6614 int err;
6615
6616 if (hw->mac.type != ixgbe_mac_82599EB || !max_vfs)
6617 return;
6618
6619 /* The 82599 supports up to 64 VFs per physical function
6620 * but this implementation limits allocation to 63 so that
6621 * basic networking resources are still available to the
6622 * physical function
6623 */
6624 adapter->num_vfs = (max_vfs > 63) ? 63 : max_vfs;
6625 adapter->flags |= IXGBE_FLAG_SRIOV_ENABLED;
6626 err = pci_enable_sriov(adapter->pdev, adapter->num_vfs);
6627 if (err) {
6628 e_err(probe, "Failed to enable PCI sriov: %d\n", err);
6629 goto err_novfs;
6630 }
6631 /* If call to enable VFs succeeded then allocate memory
6632 * for per VF control structures.
6633 */
6634 adapter->vfinfo =
6635 kcalloc(adapter->num_vfs,
6636 sizeof(struct vf_data_storage), GFP_KERNEL);
6637 if (adapter->vfinfo) {
6638 /* Now that we're sure SR-IOV is enabled
6639 * and memory allocated set up the mailbox parameters
6640 */
6641 ixgbe_init_mbx_params_pf(hw);
6642 memcpy(&hw->mbx.ops, ii->mbx_ops,
6643 sizeof(hw->mbx.ops));
6644
6645 /* Disable RSC when in SR-IOV mode */
6646 adapter->flags2 &= ~(IXGBE_FLAG2_RSC_CAPABLE |
6647 IXGBE_FLAG2_RSC_ENABLED);
6648 return;
6649 }
6650
6651 /* Oh oh */
6652 e_err(probe, "Unable to allocate memory for VF Data Storage - "
6653 "SRIOV disabled\n");
6654 pci_disable_sriov(adapter->pdev);
6655
6656 err_novfs:
6657 adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
6658 adapter->num_vfs = 0;
6659 #endif /* CONFIG_PCI_IOV */
6660 }
6661
6662 /**
6663 * ixgbe_probe - Device Initialization Routine
6664 * @pdev: PCI device information struct
6665 * @ent: entry in ixgbe_pci_tbl
6666 *
6667 * Returns 0 on success, negative on failure
6668 *
6669 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
6670 * The OS initialization, configuring of the adapter private structure,
6671 * and a hardware reset occur.
6672 **/
6673 static int __devinit ixgbe_probe(struct pci_dev *pdev,
6674 const struct pci_device_id *ent)
6675 {
6676 struct net_device *netdev;
6677 struct ixgbe_adapter *adapter = NULL;
6678 struct ixgbe_hw *hw;
6679 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
6680 static int cards_found;
6681 int i, err, pci_using_dac;
6682 unsigned int indices = num_possible_cpus();
6683 #ifdef IXGBE_FCOE
6684 u16 device_caps;
6685 #endif
6686 u32 part_num, eec;
6687
6688 /* Catch broken hardware that put the wrong VF device ID in
6689 * the PCIe SR-IOV capability.
6690 */
6691 if (pdev->is_virtfn) {
6692 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
6693 pci_name(pdev), pdev->vendor, pdev->device);
6694 return -EINVAL;
6695 }
6696
6697 err = pci_enable_device_mem(pdev);
6698 if (err)
6699 return err;
6700
6701 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
6702 !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
6703 pci_using_dac = 1;
6704 } else {
6705 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
6706 if (err) {
6707 err = dma_set_coherent_mask(&pdev->dev,
6708 DMA_BIT_MASK(32));
6709 if (err) {
6710 dev_err(&pdev->dev,
6711 "No usable DMA configuration, aborting\n");
6712 goto err_dma;
6713 }
6714 }
6715 pci_using_dac = 0;
6716 }
6717
6718 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
6719 IORESOURCE_MEM), ixgbe_driver_name);
6720 if (err) {
6721 dev_err(&pdev->dev,
6722 "pci_request_selected_regions failed 0x%x\n", err);
6723 goto err_pci_reg;
6724 }
6725
6726 pci_enable_pcie_error_reporting(pdev);
6727
6728 pci_set_master(pdev);
6729 pci_save_state(pdev);
6730
6731 if (ii->mac == ixgbe_mac_82598EB)
6732 indices = min_t(unsigned int, indices, IXGBE_MAX_RSS_INDICES);
6733 else
6734 indices = min_t(unsigned int, indices, IXGBE_MAX_FDIR_INDICES);
6735
6736 indices = max_t(unsigned int, indices, IXGBE_MAX_DCB_INDICES);
6737 #ifdef IXGBE_FCOE
6738 indices += min_t(unsigned int, num_possible_cpus(),
6739 IXGBE_MAX_FCOE_INDICES);
6740 #endif
6741 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
6742 if (!netdev) {
6743 err = -ENOMEM;
6744 goto err_alloc_etherdev;
6745 }
6746
6747 SET_NETDEV_DEV(netdev, &pdev->dev);
6748
6749 pci_set_drvdata(pdev, netdev);
6750 adapter = netdev_priv(netdev);
6751
6752 adapter->netdev = netdev;
6753 adapter->pdev = pdev;
6754 hw = &adapter->hw;
6755 hw->back = adapter;
6756 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
6757
6758 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
6759 pci_resource_len(pdev, 0));
6760 if (!hw->hw_addr) {
6761 err = -EIO;
6762 goto err_ioremap;
6763 }
6764
6765 for (i = 1; i <= 5; i++) {
6766 if (pci_resource_len(pdev, i) == 0)
6767 continue;
6768 }
6769
6770 netdev->netdev_ops = &ixgbe_netdev_ops;
6771 ixgbe_set_ethtool_ops(netdev);
6772 netdev->watchdog_timeo = 5 * HZ;
6773 strcpy(netdev->name, pci_name(pdev));
6774
6775 adapter->bd_number = cards_found;
6776
6777 /* Setup hw api */
6778 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
6779 hw->mac.type = ii->mac;
6780
6781 /* EEPROM */
6782 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
6783 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
6784 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
6785 if (!(eec & (1 << 8)))
6786 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
6787
6788 /* PHY */
6789 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
6790 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
6791 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
6792 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
6793 hw->phy.mdio.mmds = 0;
6794 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
6795 hw->phy.mdio.dev = netdev;
6796 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
6797 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
6798
6799 /* set up this timer and work struct before calling get_invariants
6800 * which might start the timer
6801 */
6802 init_timer(&adapter->sfp_timer);
6803 adapter->sfp_timer.function = ixgbe_sfp_timer;
6804 adapter->sfp_timer.data = (unsigned long) adapter;
6805
6806 INIT_WORK(&adapter->sfp_task, ixgbe_sfp_task);
6807
6808 /* multispeed fiber has its own tasklet, called from GPI SDP1 context */
6809 INIT_WORK(&adapter->multispeed_fiber_task, ixgbe_multispeed_fiber_task);
6810
6811 /* a new SFP+ module arrival, called from GPI SDP2 context */
6812 INIT_WORK(&adapter->sfp_config_module_task,
6813 ixgbe_sfp_config_module_task);
6814
6815 ii->get_invariants(hw);
6816
6817 /* setup the private structure */
6818 err = ixgbe_sw_init(adapter);
6819 if (err)
6820 goto err_sw_init;
6821
6822 /* Make it possible the adapter to be woken up via WOL */
6823 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
6824 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
6825
6826 /*
6827 * If there is a fan on this device and it has failed log the
6828 * failure.
6829 */
6830 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
6831 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
6832 if (esdp & IXGBE_ESDP_SDP1)
6833 e_crit(probe, "Fan has stopped, replace the adapter\n");
6834 }
6835
6836 /* reset_hw fills in the perm_addr as well */
6837 hw->phy.reset_if_overtemp = true;
6838 err = hw->mac.ops.reset_hw(hw);
6839 hw->phy.reset_if_overtemp = false;
6840 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
6841 hw->mac.type == ixgbe_mac_82598EB) {
6842 /*
6843 * Start a kernel thread to watch for a module to arrive.
6844 * Only do this for 82598, since 82599 will generate
6845 * interrupts on module arrival.
6846 */
6847 set_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
6848 mod_timer(&adapter->sfp_timer,
6849 round_jiffies(jiffies + (2 * HZ)));
6850 err = 0;
6851 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
6852 e_dev_err("failed to initialize because an unsupported SFP+ "
6853 "module type was detected.\n");
6854 e_dev_err("Reload the driver after installing a supported "
6855 "module.\n");
6856 goto err_sw_init;
6857 } else if (err) {
6858 e_dev_err("HW Init failed: %d\n", err);
6859 goto err_sw_init;
6860 }
6861
6862 ixgbe_probe_vf(adapter, ii);
6863
6864 netdev->features = NETIF_F_SG |
6865 NETIF_F_IP_CSUM |
6866 NETIF_F_HW_VLAN_TX |
6867 NETIF_F_HW_VLAN_RX |
6868 NETIF_F_HW_VLAN_FILTER;
6869
6870 netdev->features |= NETIF_F_IPV6_CSUM;
6871 netdev->features |= NETIF_F_TSO;
6872 netdev->features |= NETIF_F_TSO6;
6873 netdev->features |= NETIF_F_GRO;
6874
6875 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
6876 netdev->features |= NETIF_F_SCTP_CSUM;
6877
6878 netdev->vlan_features |= NETIF_F_TSO;
6879 netdev->vlan_features |= NETIF_F_TSO6;
6880 netdev->vlan_features |= NETIF_F_IP_CSUM;
6881 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
6882 netdev->vlan_features |= NETIF_F_SG;
6883
6884 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6885 adapter->flags &= ~(IXGBE_FLAG_RSS_ENABLED |
6886 IXGBE_FLAG_DCB_ENABLED);
6887 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
6888 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
6889
6890 #ifdef CONFIG_IXGBE_DCB
6891 netdev->dcbnl_ops = &dcbnl_ops;
6892 #endif
6893
6894 #ifdef IXGBE_FCOE
6895 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
6896 if (hw->mac.ops.get_device_caps) {
6897 hw->mac.ops.get_device_caps(hw, &device_caps);
6898 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
6899 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
6900 }
6901 }
6902 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
6903 netdev->vlan_features |= NETIF_F_FCOE_CRC;
6904 netdev->vlan_features |= NETIF_F_FSO;
6905 netdev->vlan_features |= NETIF_F_FCOE_MTU;
6906 }
6907 #endif /* IXGBE_FCOE */
6908 if (pci_using_dac) {
6909 netdev->features |= NETIF_F_HIGHDMA;
6910 netdev->vlan_features |= NETIF_F_HIGHDMA;
6911 }
6912
6913 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
6914 netdev->features |= NETIF_F_LRO;
6915
6916 /* make sure the EEPROM is good */
6917 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
6918 e_dev_err("The EEPROM Checksum Is Not Valid\n");
6919 err = -EIO;
6920 goto err_eeprom;
6921 }
6922
6923 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
6924 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
6925
6926 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
6927 e_dev_err("invalid MAC address\n");
6928 err = -EIO;
6929 goto err_eeprom;
6930 }
6931
6932 /* power down the optics */
6933 if (hw->phy.multispeed_fiber)
6934 hw->mac.ops.disable_tx_laser(hw);
6935
6936 init_timer(&adapter->watchdog_timer);
6937 adapter->watchdog_timer.function = ixgbe_watchdog;
6938 adapter->watchdog_timer.data = (unsigned long)adapter;
6939
6940 INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
6941 INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
6942
6943 err = ixgbe_init_interrupt_scheme(adapter);
6944 if (err)
6945 goto err_sw_init;
6946
6947 switch (pdev->device) {
6948 case IXGBE_DEV_ID_82599_KX4:
6949 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
6950 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
6951 break;
6952 default:
6953 adapter->wol = 0;
6954 break;
6955 }
6956 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
6957
6958 /* pick up the PCI bus settings for reporting later */
6959 hw->mac.ops.get_bus_info(hw);
6960
6961 /* print bus type/speed/width info */
6962 e_dev_info("(PCI Express:%s:%s) %pM\n",
6963 (hw->bus.speed == ixgbe_bus_speed_5000 ? "5.0Gb/s" :
6964 hw->bus.speed == ixgbe_bus_speed_2500 ? "2.5Gb/s" :
6965 "Unknown"),
6966 (hw->bus.width == ixgbe_bus_width_pcie_x8 ? "Width x8" :
6967 hw->bus.width == ixgbe_bus_width_pcie_x4 ? "Width x4" :
6968 hw->bus.width == ixgbe_bus_width_pcie_x1 ? "Width x1" :
6969 "Unknown"),
6970 netdev->dev_addr);
6971 ixgbe_read_pba_num_generic(hw, &part_num);
6972 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
6973 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, "
6974 "PBA No: %06x-%03x\n",
6975 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
6976 (part_num >> 8), (part_num & 0xff));
6977 else
6978 e_dev_info("MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
6979 hw->mac.type, hw->phy.type,
6980 (part_num >> 8), (part_num & 0xff));
6981
6982 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
6983 e_dev_warn("PCI-Express bandwidth available for this card is "
6984 "not sufficient for optimal performance.\n");
6985 e_dev_warn("For optimal performance a x8 PCI-Express slot "
6986 "is required.\n");
6987 }
6988
6989 /* save off EEPROM version number */
6990 hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
6991
6992 /* reset the hardware with the new settings */
6993 err = hw->mac.ops.start_hw(hw);
6994
6995 if (err == IXGBE_ERR_EEPROM_VERSION) {
6996 /* We are running on a pre-production device, log a warning */
6997 e_dev_warn("This device is a pre-production adapter/LOM. "
6998 "Please be aware there may be issues associated "
6999 "with your hardware. If you are experiencing "
7000 "problems please contact your Intel or hardware "
7001 "representative who provided you with this "
7002 "hardware.\n");
7003 }
7004 strcpy(netdev->name, "eth%d");
7005 err = register_netdev(netdev);
7006 if (err)
7007 goto err_register;
7008
7009 /* carrier off reporting is important to ethtool even BEFORE open */
7010 netif_carrier_off(netdev);
7011
7012 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
7013 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
7014 INIT_WORK(&adapter->fdir_reinit_task, ixgbe_fdir_reinit_task);
7015
7016 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
7017 INIT_WORK(&adapter->check_overtemp_task,
7018 ixgbe_check_overtemp_task);
7019 #ifdef CONFIG_IXGBE_DCA
7020 if (dca_add_requester(&pdev->dev) == 0) {
7021 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
7022 ixgbe_setup_dca(adapter);
7023 }
7024 #endif
7025 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
7026 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
7027 for (i = 0; i < adapter->num_vfs; i++)
7028 ixgbe_vf_configuration(pdev, (i | 0x10000000));
7029 }
7030
7031 /* add san mac addr to netdev */
7032 ixgbe_add_sanmac_netdev(netdev);
7033
7034 e_dev_info("Intel(R) 10 Gigabit Network Connection\n");
7035 cards_found++;
7036 return 0;
7037
7038 err_register:
7039 ixgbe_release_hw_control(adapter);
7040 ixgbe_clear_interrupt_scheme(adapter);
7041 err_sw_init:
7042 err_eeprom:
7043 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7044 ixgbe_disable_sriov(adapter);
7045 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
7046 del_timer_sync(&adapter->sfp_timer);
7047 cancel_work_sync(&adapter->sfp_task);
7048 cancel_work_sync(&adapter->multispeed_fiber_task);
7049 cancel_work_sync(&adapter->sfp_config_module_task);
7050 iounmap(hw->hw_addr);
7051 err_ioremap:
7052 free_netdev(netdev);
7053 err_alloc_etherdev:
7054 pci_release_selected_regions(pdev,
7055 pci_select_bars(pdev, IORESOURCE_MEM));
7056 err_pci_reg:
7057 err_dma:
7058 pci_disable_device(pdev);
7059 return err;
7060 }
7061
7062 /**
7063 * ixgbe_remove - Device Removal Routine
7064 * @pdev: PCI device information struct
7065 *
7066 * ixgbe_remove is called by the PCI subsystem to alert the driver
7067 * that it should release a PCI device. The could be caused by a
7068 * Hot-Plug event, or because the driver is going to be removed from
7069 * memory.
7070 **/
7071 static void __devexit ixgbe_remove(struct pci_dev *pdev)
7072 {
7073 struct net_device *netdev = pci_get_drvdata(pdev);
7074 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7075
7076 set_bit(__IXGBE_DOWN, &adapter->state);
7077 /* clear the module not found bit to make sure the worker won't
7078 * reschedule
7079 */
7080 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
7081 del_timer_sync(&adapter->watchdog_timer);
7082
7083 del_timer_sync(&adapter->sfp_timer);
7084 cancel_work_sync(&adapter->watchdog_task);
7085 cancel_work_sync(&adapter->sfp_task);
7086 cancel_work_sync(&adapter->multispeed_fiber_task);
7087 cancel_work_sync(&adapter->sfp_config_module_task);
7088 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
7089 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
7090 cancel_work_sync(&adapter->fdir_reinit_task);
7091 flush_scheduled_work();
7092
7093 #ifdef CONFIG_IXGBE_DCA
7094 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
7095 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
7096 dca_remove_requester(&pdev->dev);
7097 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
7098 }
7099
7100 #endif
7101 #ifdef IXGBE_FCOE
7102 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
7103 ixgbe_cleanup_fcoe(adapter);
7104
7105 #endif /* IXGBE_FCOE */
7106
7107 /* remove the added san mac */
7108 ixgbe_del_sanmac_netdev(netdev);
7109
7110 if (netdev->reg_state == NETREG_REGISTERED)
7111 unregister_netdev(netdev);
7112
7113 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7114 ixgbe_disable_sriov(adapter);
7115
7116 ixgbe_clear_interrupt_scheme(adapter);
7117
7118 ixgbe_release_hw_control(adapter);
7119
7120 iounmap(adapter->hw.hw_addr);
7121 pci_release_selected_regions(pdev, pci_select_bars(pdev,
7122 IORESOURCE_MEM));
7123
7124 e_dev_info("complete\n");
7125
7126 free_netdev(netdev);
7127
7128 pci_disable_pcie_error_reporting(pdev);
7129
7130 pci_disable_device(pdev);
7131 }
7132
7133 /**
7134 * ixgbe_io_error_detected - called when PCI error is detected
7135 * @pdev: Pointer to PCI device
7136 * @state: The current pci connection state
7137 *
7138 * This function is called after a PCI bus error affecting
7139 * this device has been detected.
7140 */
7141 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
7142 pci_channel_state_t state)
7143 {
7144 struct net_device *netdev = pci_get_drvdata(pdev);
7145 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7146
7147 netif_device_detach(netdev);
7148
7149 if (state == pci_channel_io_perm_failure)
7150 return PCI_ERS_RESULT_DISCONNECT;
7151
7152 if (netif_running(netdev))
7153 ixgbe_down(adapter);
7154 pci_disable_device(pdev);
7155
7156 /* Request a slot reset. */
7157 return PCI_ERS_RESULT_NEED_RESET;
7158 }
7159
7160 /**
7161 * ixgbe_io_slot_reset - called after the pci bus has been reset.
7162 * @pdev: Pointer to PCI device
7163 *
7164 * Restart the card from scratch, as if from a cold-boot.
7165 */
7166 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
7167 {
7168 struct net_device *netdev = pci_get_drvdata(pdev);
7169 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7170 pci_ers_result_t result;
7171 int err;
7172
7173 if (pci_enable_device_mem(pdev)) {
7174 e_err(probe, "Cannot re-enable PCI device after reset.\n");
7175 result = PCI_ERS_RESULT_DISCONNECT;
7176 } else {
7177 pci_set_master(pdev);
7178 pci_restore_state(pdev);
7179 pci_save_state(pdev);
7180
7181 pci_wake_from_d3(pdev, false);
7182
7183 ixgbe_reset(adapter);
7184 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7185 result = PCI_ERS_RESULT_RECOVERED;
7186 }
7187
7188 err = pci_cleanup_aer_uncorrect_error_status(pdev);
7189 if (err) {
7190 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
7191 "failed 0x%0x\n", err);
7192 /* non-fatal, continue */
7193 }
7194
7195 return result;
7196 }
7197
7198 /**
7199 * ixgbe_io_resume - called when traffic can start flowing again.
7200 * @pdev: Pointer to PCI device
7201 *
7202 * This callback is called when the error recovery driver tells us that
7203 * its OK to resume normal operation.
7204 */
7205 static void ixgbe_io_resume(struct pci_dev *pdev)
7206 {
7207 struct net_device *netdev = pci_get_drvdata(pdev);
7208 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7209
7210 if (netif_running(netdev)) {
7211 if (ixgbe_up(adapter)) {
7212 e_info(probe, "ixgbe_up failed after reset\n");
7213 return;
7214 }
7215 }
7216
7217 netif_device_attach(netdev);
7218 }
7219
7220 static struct pci_error_handlers ixgbe_err_handler = {
7221 .error_detected = ixgbe_io_error_detected,
7222 .slot_reset = ixgbe_io_slot_reset,
7223 .resume = ixgbe_io_resume,
7224 };
7225
7226 static struct pci_driver ixgbe_driver = {
7227 .name = ixgbe_driver_name,
7228 .id_table = ixgbe_pci_tbl,
7229 .probe = ixgbe_probe,
7230 .remove = __devexit_p(ixgbe_remove),
7231 #ifdef CONFIG_PM
7232 .suspend = ixgbe_suspend,
7233 .resume = ixgbe_resume,
7234 #endif
7235 .shutdown = ixgbe_shutdown,
7236 .err_handler = &ixgbe_err_handler
7237 };
7238
7239 /**
7240 * ixgbe_init_module - Driver Registration Routine
7241 *
7242 * ixgbe_init_module is the first routine called when the driver is
7243 * loaded. All it does is register with the PCI subsystem.
7244 **/
7245 static int __init ixgbe_init_module(void)
7246 {
7247 int ret;
7248 pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
7249 pr_info("%s\n", ixgbe_copyright);
7250
7251 #ifdef CONFIG_IXGBE_DCA
7252 dca_register_notify(&dca_notifier);
7253 #endif
7254
7255 ret = pci_register_driver(&ixgbe_driver);
7256 return ret;
7257 }
7258
7259 module_init(ixgbe_init_module);
7260
7261 /**
7262 * ixgbe_exit_module - Driver Exit Cleanup Routine
7263 *
7264 * ixgbe_exit_module is called just before the driver is removed
7265 * from memory.
7266 **/
7267 static void __exit ixgbe_exit_module(void)
7268 {
7269 #ifdef CONFIG_IXGBE_DCA
7270 dca_unregister_notify(&dca_notifier);
7271 #endif
7272 pci_unregister_driver(&ixgbe_driver);
7273 }
7274
7275 #ifdef CONFIG_IXGBE_DCA
7276 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
7277 void *p)
7278 {
7279 int ret_val;
7280
7281 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
7282 __ixgbe_notify_dca);
7283
7284 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
7285 }
7286
7287 #endif /* CONFIG_IXGBE_DCA */
7288
7289 /**
7290 * ixgbe_get_hw_dev return device
7291 * used by hardware layer to print debugging information
7292 **/
7293 struct net_device *ixgbe_get_hw_dev(struct ixgbe_hw *hw)
7294 {
7295 struct ixgbe_adapter *adapter = hw->back;
7296 return adapter->netdev;
7297 }
7298
7299 module_exit(ixgbe_exit_module);
7300
7301 /* ixgbe_main.c */
Linux kernel - Deliverables
This page took 0.302492 seconds and 6 git commands to generate.