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ixgbe: add WOL support for backplane adapters
[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 switch (adapter->hw.mac.type) {
593 case ixgbe_mac_82598EB:
594 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
595 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
596 break;
597 case ixgbe_mac_82599EB:
598 mask = (qmask & 0xFFFFFFFF);
599 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
600 mask = (qmask >> 32);
601 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
602 break;
603 default:
604 break;
605 }
606 }
607
608 void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *tx_ring,
609 struct ixgbe_tx_buffer *tx_buffer_info)
610 {
611 if (tx_buffer_info->dma) {
612 if (tx_buffer_info->mapped_as_page)
613 dma_unmap_page(tx_ring->dev,
614 tx_buffer_info->dma,
615 tx_buffer_info->length,
616 DMA_TO_DEVICE);
617 else
618 dma_unmap_single(tx_ring->dev,
619 tx_buffer_info->dma,
620 tx_buffer_info->length,
621 DMA_TO_DEVICE);
622 tx_buffer_info->dma = 0;
623 }
624 if (tx_buffer_info->skb) {
625 dev_kfree_skb_any(tx_buffer_info->skb);
626 tx_buffer_info->skb = NULL;
627 }
628 tx_buffer_info->time_stamp = 0;
629 /* tx_buffer_info must be completely set up in the transmit path */
630 }
631
632 /**
633 * ixgbe_tx_xon_state - check the tx ring xon state
634 * @adapter: the ixgbe adapter
635 * @tx_ring: the corresponding tx_ring
636 *
637 * If not in DCB mode, checks TFCS.TXOFF, otherwise, find out the
638 * corresponding TC of this tx_ring when checking TFCS.
639 *
640 * Returns : true if in xon state (currently not paused)
641 */
642 static inline bool ixgbe_tx_xon_state(struct ixgbe_adapter *adapter,
643 struct ixgbe_ring *tx_ring)
644 {
645 u32 txoff = IXGBE_TFCS_TXOFF;
646
647 #ifdef CONFIG_IXGBE_DCB
648 if (adapter->dcb_cfg.pfc_mode_enable) {
649 int tc;
650 int reg_idx = tx_ring->reg_idx;
651 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
652
653 switch (adapter->hw.mac.type) {
654 case ixgbe_mac_82598EB:
655 tc = reg_idx >> 2;
656 txoff = IXGBE_TFCS_TXOFF0;
657 break;
658 case ixgbe_mac_82599EB:
659 tc = 0;
660 txoff = IXGBE_TFCS_TXOFF;
661 if (dcb_i == 8) {
662 /* TC0, TC1 */
663 tc = reg_idx >> 5;
664 if (tc == 2) /* TC2, TC3 */
665 tc += (reg_idx - 64) >> 4;
666 else if (tc == 3) /* TC4, TC5, TC6, TC7 */
667 tc += 1 + ((reg_idx - 96) >> 3);
668 } else if (dcb_i == 4) {
669 /* TC0, TC1 */
670 tc = reg_idx >> 6;
671 if (tc == 1) {
672 tc += (reg_idx - 64) >> 5;
673 if (tc == 2) /* TC2, TC3 */
674 tc += (reg_idx - 96) >> 4;
675 }
676 }
677 break;
678 default:
679 tc = 0;
680 break;
681 }
682 txoff <<= tc;
683 }
684 #endif
685 return IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & txoff;
686 }
687
688 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
689 struct ixgbe_ring *tx_ring,
690 unsigned int eop)
691 {
692 struct ixgbe_hw *hw = &adapter->hw;
693
694 /* Detect a transmit hang in hardware, this serializes the
695 * check with the clearing of time_stamp and movement of eop */
696 clear_check_for_tx_hang(tx_ring);
697 if (tx_ring->tx_buffer_info[eop].time_stamp &&
698 time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
699 ixgbe_tx_xon_state(adapter, tx_ring)) {
700 /* detected Tx unit hang */
701 union ixgbe_adv_tx_desc *tx_desc;
702 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
703 e_err(drv, "Detected Tx Unit Hang\n"
704 " Tx Queue <%d>\n"
705 " TDH, TDT <%x>, <%x>\n"
706 " next_to_use <%x>\n"
707 " next_to_clean <%x>\n"
708 "tx_buffer_info[next_to_clean]\n"
709 " time_stamp <%lx>\n"
710 " jiffies <%lx>\n",
711 tx_ring->queue_index,
712 IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)),
713 IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)),
714 tx_ring->next_to_use, eop,
715 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
716 return true;
717 }
718
719 return false;
720 }
721
722 #define IXGBE_MAX_TXD_PWR 14
723 #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
724
725 /* Tx Descriptors needed, worst case */
726 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
727 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
728 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
729 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
730
731 static void ixgbe_tx_timeout(struct net_device *netdev);
732
733 /**
734 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
735 * @q_vector: structure containing interrupt and ring information
736 * @tx_ring: tx ring to clean
737 **/
738 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
739 struct ixgbe_ring *tx_ring)
740 {
741 struct ixgbe_adapter *adapter = q_vector->adapter;
742 union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
743 struct ixgbe_tx_buffer *tx_buffer_info;
744 unsigned int total_bytes = 0, total_packets = 0;
745 u16 i, eop, count = 0;
746
747 i = tx_ring->next_to_clean;
748 eop = tx_ring->tx_buffer_info[i].next_to_watch;
749 eop_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
750
751 while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
752 (count < tx_ring->work_limit)) {
753 bool cleaned = false;
754 rmb(); /* read buffer_info after eop_desc */
755 for ( ; !cleaned; count++) {
756 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
757 tx_buffer_info = &tx_ring->tx_buffer_info[i];
758
759 tx_desc->wb.status = 0;
760 cleaned = (i == eop);
761
762 i++;
763 if (i == tx_ring->count)
764 i = 0;
765
766 if (cleaned && tx_buffer_info->skb) {
767 total_bytes += tx_buffer_info->bytecount;
768 total_packets += tx_buffer_info->gso_segs;
769 }
770
771 ixgbe_unmap_and_free_tx_resource(tx_ring,
772 tx_buffer_info);
773 }
774
775 eop = tx_ring->tx_buffer_info[i].next_to_watch;
776 eop_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
777 }
778
779 tx_ring->next_to_clean = i;
780 tx_ring->total_bytes += total_bytes;
781 tx_ring->total_packets += total_packets;
782 u64_stats_update_begin(&tx_ring->syncp);
783 tx_ring->stats.packets += total_packets;
784 tx_ring->stats.bytes += total_bytes;
785 u64_stats_update_end(&tx_ring->syncp);
786
787 if (check_for_tx_hang(tx_ring) &&
788 ixgbe_check_tx_hang(adapter, tx_ring, i)) {
789 /* schedule immediate reset if we believe we hung */
790 e_info(probe, "tx hang %d detected, resetting "
791 "adapter\n", adapter->tx_timeout_count + 1);
792 ixgbe_tx_timeout(adapter->netdev);
793
794 /* the adapter is about to reset, no point in enabling stuff */
795 return true;
796 }
797
798 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
799 if (unlikely(count && netif_carrier_ok(tx_ring->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(tx_ring->netdev, tx_ring->queue_index) &&
806 !test_bit(__IXGBE_DOWN, &adapter->state)) {
807 netif_wake_subqueue(tx_ring->netdev, tx_ring->queue_index);
808 ++tx_ring->tx_stats.restart_queue;
809 }
810 }
811
812 return count < tx_ring->work_limit;
813 }
814
815 #ifdef CONFIG_IXGBE_DCA
816 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
817 struct ixgbe_ring *rx_ring,
818 int cpu)
819 {
820 struct ixgbe_hw *hw = &adapter->hw;
821 u32 rxctrl;
822 u8 reg_idx = rx_ring->reg_idx;
823
824 rxctrl = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(reg_idx));
825 switch (hw->mac.type) {
826 case ixgbe_mac_82598EB:
827 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
828 rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
829 break;
830 case ixgbe_mac_82599EB:
831 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
832 rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
833 IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
834 break;
835 default:
836 break;
837 }
838 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
839 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
840 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
841 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_WRO_EN |
842 IXGBE_DCA_RXCTRL_DESC_HSRO_EN);
843 IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl);
844 }
845
846 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
847 struct ixgbe_ring *tx_ring,
848 int cpu)
849 {
850 struct ixgbe_hw *hw = &adapter->hw;
851 u32 txctrl;
852 u8 reg_idx = tx_ring->reg_idx;
853
854 switch (hw->mac.type) {
855 case ixgbe_mac_82598EB:
856 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(reg_idx));
857 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
858 txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
859 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
860 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
861 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(reg_idx), txctrl);
862 break;
863 case ixgbe_mac_82599EB:
864 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(reg_idx));
865 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
866 txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
867 IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
868 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
869 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
870 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(reg_idx), txctrl);
871 break;
872 default:
873 break;
874 }
875 }
876
877 static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
878 {
879 struct ixgbe_adapter *adapter = q_vector->adapter;
880 int cpu = get_cpu();
881 long r_idx;
882 int i;
883
884 if (q_vector->cpu == cpu)
885 goto out_no_update;
886
887 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
888 for (i = 0; i < q_vector->txr_count; i++) {
889 ixgbe_update_tx_dca(adapter, adapter->tx_ring[r_idx], cpu);
890 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
891 r_idx + 1);
892 }
893
894 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
895 for (i = 0; i < q_vector->rxr_count; i++) {
896 ixgbe_update_rx_dca(adapter, adapter->rx_ring[r_idx], cpu);
897 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
898 r_idx + 1);
899 }
900
901 q_vector->cpu = cpu;
902 out_no_update:
903 put_cpu();
904 }
905
906 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
907 {
908 int num_q_vectors;
909 int i;
910
911 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
912 return;
913
914 /* always use CB2 mode, difference is masked in the CB driver */
915 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
916
917 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
918 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
919 else
920 num_q_vectors = 1;
921
922 for (i = 0; i < num_q_vectors; i++) {
923 adapter->q_vector[i]->cpu = -1;
924 ixgbe_update_dca(adapter->q_vector[i]);
925 }
926 }
927
928 static int __ixgbe_notify_dca(struct device *dev, void *data)
929 {
930 struct ixgbe_adapter *adapter = dev_get_drvdata(dev);
931 unsigned long event = *(unsigned long *)data;
932
933 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
934 return 0;
935
936 switch (event) {
937 case DCA_PROVIDER_ADD:
938 /* if we're already enabled, don't do it again */
939 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
940 break;
941 if (dca_add_requester(dev) == 0) {
942 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
943 ixgbe_setup_dca(adapter);
944 break;
945 }
946 /* Fall Through since DCA is disabled. */
947 case DCA_PROVIDER_REMOVE:
948 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
949 dca_remove_requester(dev);
950 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
951 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
952 }
953 break;
954 }
955
956 return 0;
957 }
958
959 #endif /* CONFIG_IXGBE_DCA */
960 /**
961 * ixgbe_receive_skb - Send a completed packet up the stack
962 * @adapter: board private structure
963 * @skb: packet to send up
964 * @status: hardware indication of status of receive
965 * @rx_ring: rx descriptor ring (for a specific queue) to setup
966 * @rx_desc: rx descriptor
967 **/
968 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
969 struct sk_buff *skb, u8 status,
970 struct ixgbe_ring *ring,
971 union ixgbe_adv_rx_desc *rx_desc)
972 {
973 struct ixgbe_adapter *adapter = q_vector->adapter;
974 struct napi_struct *napi = &q_vector->napi;
975 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
976 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
977
978 if (is_vlan && (tag & VLAN_VID_MASK))
979 __vlan_hwaccel_put_tag(skb, tag);
980
981 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
982 napi_gro_receive(napi, skb);
983 else
984 netif_rx(skb);
985 }
986
987 /**
988 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
989 * @adapter: address of board private structure
990 * @status_err: hardware indication of status of receive
991 * @skb: skb currently being received and modified
992 **/
993 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
994 union ixgbe_adv_rx_desc *rx_desc,
995 struct sk_buff *skb)
996 {
997 u32 status_err = le32_to_cpu(rx_desc->wb.upper.status_error);
998
999 skb_checksum_none_assert(skb);
1000
1001 /* Rx csum disabled */
1002 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
1003 return;
1004
1005 /* if IP and error */
1006 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
1007 (status_err & IXGBE_RXDADV_ERR_IPE)) {
1008 adapter->hw_csum_rx_error++;
1009 return;
1010 }
1011
1012 if (!(status_err & IXGBE_RXD_STAT_L4CS))
1013 return;
1014
1015 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
1016 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1017
1018 /*
1019 * 82599 errata, UDP frames with a 0 checksum can be marked as
1020 * checksum errors.
1021 */
1022 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
1023 (adapter->hw.mac.type == ixgbe_mac_82599EB))
1024 return;
1025
1026 adapter->hw_csum_rx_error++;
1027 return;
1028 }
1029
1030 /* It must be a TCP or UDP packet with a valid checksum */
1031 skb->ip_summed = CHECKSUM_UNNECESSARY;
1032 }
1033
1034 static inline void ixgbe_release_rx_desc(struct ixgbe_ring *rx_ring, u32 val)
1035 {
1036 /*
1037 * Force memory writes to complete before letting h/w
1038 * know there are new descriptors to fetch. (Only
1039 * applicable for weak-ordered memory model archs,
1040 * such as IA-64).
1041 */
1042 wmb();
1043 writel(val, rx_ring->tail);
1044 }
1045
1046 /**
1047 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
1048 * @rx_ring: ring to place buffers on
1049 * @cleaned_count: number of buffers to replace
1050 **/
1051 void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count)
1052 {
1053 union ixgbe_adv_rx_desc *rx_desc;
1054 struct ixgbe_rx_buffer *bi;
1055 struct sk_buff *skb;
1056 u16 i = rx_ring->next_to_use;
1057
1058 /* do nothing if no valid netdev defined */
1059 if (!rx_ring->netdev)
1060 return;
1061
1062 while (cleaned_count--) {
1063 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1064 bi = &rx_ring->rx_buffer_info[i];
1065 skb = bi->skb;
1066
1067 if (!skb) {
1068 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
1069 rx_ring->rx_buf_len);
1070 if (!skb) {
1071 rx_ring->rx_stats.alloc_rx_buff_failed++;
1072 goto no_buffers;
1073 }
1074 /* initialize queue mapping */
1075 skb_record_rx_queue(skb, rx_ring->queue_index);
1076 bi->skb = skb;
1077 }
1078
1079 if (!bi->dma) {
1080 bi->dma = dma_map_single(rx_ring->dev,
1081 skb->data,
1082 rx_ring->rx_buf_len,
1083 DMA_FROM_DEVICE);
1084 if (dma_mapping_error(rx_ring->dev, bi->dma)) {
1085 rx_ring->rx_stats.alloc_rx_buff_failed++;
1086 bi->dma = 0;
1087 goto no_buffers;
1088 }
1089 }
1090
1091 if (ring_is_ps_enabled(rx_ring)) {
1092 if (!bi->page) {
1093 bi->page = netdev_alloc_page(rx_ring->netdev);
1094 if (!bi->page) {
1095 rx_ring->rx_stats.alloc_rx_page_failed++;
1096 goto no_buffers;
1097 }
1098 }
1099
1100 if (!bi->page_dma) {
1101 /* use a half page if we're re-using */
1102 bi->page_offset ^= PAGE_SIZE / 2;
1103 bi->page_dma = dma_map_page(rx_ring->dev,
1104 bi->page,
1105 bi->page_offset,
1106 PAGE_SIZE / 2,
1107 DMA_FROM_DEVICE);
1108 if (dma_mapping_error(rx_ring->dev,
1109 bi->page_dma)) {
1110 rx_ring->rx_stats.alloc_rx_page_failed++;
1111 bi->page_dma = 0;
1112 goto no_buffers;
1113 }
1114 }
1115
1116 /* Refresh the desc even if buffer_addrs didn't change
1117 * because each write-back erases this info. */
1118 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
1119 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
1120 } else {
1121 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
1122 rx_desc->read.hdr_addr = 0;
1123 }
1124
1125 i++;
1126 if (i == rx_ring->count)
1127 i = 0;
1128 }
1129
1130 no_buffers:
1131 if (rx_ring->next_to_use != i) {
1132 rx_ring->next_to_use = i;
1133 ixgbe_release_rx_desc(rx_ring, i);
1134 }
1135 }
1136
1137 static inline u16 ixgbe_get_hlen(union ixgbe_adv_rx_desc *rx_desc)
1138 {
1139 /* HW will not DMA in data larger than the given buffer, even if it
1140 * parses the (NFS, of course) header to be larger. In that case, it
1141 * fills the header buffer and spills the rest into the page.
1142 */
1143 u16 hdr_info = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info);
1144 u16 hlen = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
1145 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
1146 if (hlen > IXGBE_RX_HDR_SIZE)
1147 hlen = IXGBE_RX_HDR_SIZE;
1148 return hlen;
1149 }
1150
1151 /**
1152 * ixgbe_transform_rsc_queue - change rsc queue into a full packet
1153 * @skb: pointer to the last skb in the rsc queue
1154 *
1155 * This function changes a queue full of hw rsc buffers into a completed
1156 * packet. It uses the ->prev pointers to find the first packet and then
1157 * turns it into the frag list owner.
1158 **/
1159 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb)
1160 {
1161 unsigned int frag_list_size = 0;
1162 unsigned int skb_cnt = 1;
1163
1164 while (skb->prev) {
1165 struct sk_buff *prev = skb->prev;
1166 frag_list_size += skb->len;
1167 skb->prev = NULL;
1168 skb = prev;
1169 skb_cnt++;
1170 }
1171
1172 skb_shinfo(skb)->frag_list = skb->next;
1173 skb->next = NULL;
1174 skb->len += frag_list_size;
1175 skb->data_len += frag_list_size;
1176 skb->truesize += frag_list_size;
1177 IXGBE_RSC_CB(skb)->skb_cnt = skb_cnt;
1178
1179 return skb;
1180 }
1181
1182 static inline bool ixgbe_get_rsc_state(union ixgbe_adv_rx_desc *rx_desc)
1183 {
1184 return !!(le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
1185 IXGBE_RXDADV_RSCCNT_MASK);
1186 }
1187
1188 static void ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
1189 struct ixgbe_ring *rx_ring,
1190 int *work_done, int work_to_do)
1191 {
1192 struct ixgbe_adapter *adapter = q_vector->adapter;
1193 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
1194 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
1195 struct sk_buff *skb;
1196 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1197 const int current_node = numa_node_id();
1198 #ifdef IXGBE_FCOE
1199 int ddp_bytes = 0;
1200 #endif /* IXGBE_FCOE */
1201 u32 staterr;
1202 u16 i;
1203 u16 cleaned_count = 0;
1204 bool pkt_is_rsc = false;
1205
1206 i = rx_ring->next_to_clean;
1207 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1208 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1209
1210 while (staterr & IXGBE_RXD_STAT_DD) {
1211 u32 upper_len = 0;
1212
1213 rmb(); /* read descriptor and rx_buffer_info after status DD */
1214
1215 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1216
1217 skb = rx_buffer_info->skb;
1218 rx_buffer_info->skb = NULL;
1219 prefetch(skb->data);
1220
1221 if (ring_is_rsc_enabled(rx_ring))
1222 pkt_is_rsc = ixgbe_get_rsc_state(rx_desc);
1223
1224 /* if this is a skb from previous receive DMA will be 0 */
1225 if (rx_buffer_info->dma) {
1226 u16 hlen;
1227 if (pkt_is_rsc &&
1228 !(staterr & IXGBE_RXD_STAT_EOP) &&
1229 !skb->prev) {
1230 /*
1231 * When HWRSC is enabled, delay unmapping
1232 * of the first packet. It carries the
1233 * header information, HW may still
1234 * access the header after the writeback.
1235 * Only unmap it when EOP is reached
1236 */
1237 IXGBE_RSC_CB(skb)->delay_unmap = true;
1238 IXGBE_RSC_CB(skb)->dma = rx_buffer_info->dma;
1239 } else {
1240 dma_unmap_single(rx_ring->dev,
1241 rx_buffer_info->dma,
1242 rx_ring->rx_buf_len,
1243 DMA_FROM_DEVICE);
1244 }
1245 rx_buffer_info->dma = 0;
1246
1247 if (ring_is_ps_enabled(rx_ring)) {
1248 hlen = ixgbe_get_hlen(rx_desc);
1249 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
1250 } else {
1251 hlen = le16_to_cpu(rx_desc->wb.upper.length);
1252 }
1253
1254 skb_put(skb, hlen);
1255 } else {
1256 /* assume packet split since header is unmapped */
1257 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
1258 }
1259
1260 if (upper_len) {
1261 dma_unmap_page(rx_ring->dev,
1262 rx_buffer_info->page_dma,
1263 PAGE_SIZE / 2,
1264 DMA_FROM_DEVICE);
1265 rx_buffer_info->page_dma = 0;
1266 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
1267 rx_buffer_info->page,
1268 rx_buffer_info->page_offset,
1269 upper_len);
1270
1271 if ((page_count(rx_buffer_info->page) == 1) &&
1272 (page_to_nid(rx_buffer_info->page) == current_node))
1273 get_page(rx_buffer_info->page);
1274 else
1275 rx_buffer_info->page = NULL;
1276
1277 skb->len += upper_len;
1278 skb->data_len += upper_len;
1279 skb->truesize += upper_len;
1280 }
1281
1282 i++;
1283 if (i == rx_ring->count)
1284 i = 0;
1285
1286 next_rxd = IXGBE_RX_DESC_ADV(rx_ring, i);
1287 prefetch(next_rxd);
1288 cleaned_count++;
1289
1290 if (pkt_is_rsc) {
1291 u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
1292 IXGBE_RXDADV_NEXTP_SHIFT;
1293 next_buffer = &rx_ring->rx_buffer_info[nextp];
1294 } else {
1295 next_buffer = &rx_ring->rx_buffer_info[i];
1296 }
1297
1298 if (!(staterr & IXGBE_RXD_STAT_EOP)) {
1299 if (ring_is_ps_enabled(rx_ring)) {
1300 rx_buffer_info->skb = next_buffer->skb;
1301 rx_buffer_info->dma = next_buffer->dma;
1302 next_buffer->skb = skb;
1303 next_buffer->dma = 0;
1304 } else {
1305 skb->next = next_buffer->skb;
1306 skb->next->prev = skb;
1307 }
1308 rx_ring->rx_stats.non_eop_descs++;
1309 goto next_desc;
1310 }
1311
1312 if (skb->prev) {
1313 skb = ixgbe_transform_rsc_queue(skb);
1314 /* if we got here without RSC the packet is invalid */
1315 if (!pkt_is_rsc) {
1316 __pskb_trim(skb, 0);
1317 rx_buffer_info->skb = skb;
1318 goto next_desc;
1319 }
1320 }
1321
1322 if (ring_is_rsc_enabled(rx_ring)) {
1323 if (IXGBE_RSC_CB(skb)->delay_unmap) {
1324 dma_unmap_single(rx_ring->dev,
1325 IXGBE_RSC_CB(skb)->dma,
1326 rx_ring->rx_buf_len,
1327 DMA_FROM_DEVICE);
1328 IXGBE_RSC_CB(skb)->dma = 0;
1329 IXGBE_RSC_CB(skb)->delay_unmap = false;
1330 }
1331 }
1332 if (pkt_is_rsc) {
1333 if (ring_is_ps_enabled(rx_ring))
1334 rx_ring->rx_stats.rsc_count +=
1335 skb_shinfo(skb)->nr_frags;
1336 else
1337 rx_ring->rx_stats.rsc_count +=
1338 IXGBE_RSC_CB(skb)->skb_cnt;
1339 rx_ring->rx_stats.rsc_flush++;
1340 }
1341
1342 /* ERR_MASK will only have valid bits if EOP set */
1343 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
1344 /* trim packet back to size 0 and recycle it */
1345 __pskb_trim(skb, 0);
1346 rx_buffer_info->skb = skb;
1347 goto next_desc;
1348 }
1349
1350 ixgbe_rx_checksum(adapter, rx_desc, skb);
1351
1352 /* probably a little skewed due to removing CRC */
1353 total_rx_bytes += skb->len;
1354 total_rx_packets++;
1355
1356 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
1357 #ifdef IXGBE_FCOE
1358 /* if ddp, not passing to ULD unless for FCP_RSP or error */
1359 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
1360 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
1361 if (!ddp_bytes)
1362 goto next_desc;
1363 }
1364 #endif /* IXGBE_FCOE */
1365 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
1366
1367 next_desc:
1368 rx_desc->wb.upper.status_error = 0;
1369
1370 (*work_done)++;
1371 if (*work_done >= work_to_do)
1372 break;
1373
1374 /* return some buffers to hardware, one at a time is too slow */
1375 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
1376 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1377 cleaned_count = 0;
1378 }
1379
1380 /* use prefetched values */
1381 rx_desc = next_rxd;
1382 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1383 }
1384
1385 rx_ring->next_to_clean = i;
1386 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
1387
1388 if (cleaned_count)
1389 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1390
1391 #ifdef IXGBE_FCOE
1392 /* include DDPed FCoE data */
1393 if (ddp_bytes > 0) {
1394 unsigned int mss;
1395
1396 mss = rx_ring->netdev->mtu - sizeof(struct fcoe_hdr) -
1397 sizeof(struct fc_frame_header) -
1398 sizeof(struct fcoe_crc_eof);
1399 if (mss > 512)
1400 mss &= ~511;
1401 total_rx_bytes += ddp_bytes;
1402 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
1403 }
1404 #endif /* IXGBE_FCOE */
1405
1406 rx_ring->total_packets += total_rx_packets;
1407 rx_ring->total_bytes += total_rx_bytes;
1408 u64_stats_update_begin(&rx_ring->syncp);
1409 rx_ring->stats.packets += total_rx_packets;
1410 rx_ring->stats.bytes += total_rx_bytes;
1411 u64_stats_update_end(&rx_ring->syncp);
1412 }
1413
1414 static int ixgbe_clean_rxonly(struct napi_struct *, int);
1415 /**
1416 * ixgbe_configure_msix - Configure MSI-X hardware
1417 * @adapter: board private structure
1418 *
1419 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
1420 * interrupts.
1421 **/
1422 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
1423 {
1424 struct ixgbe_q_vector *q_vector;
1425 int i, j, q_vectors, v_idx, r_idx;
1426 u32 mask;
1427
1428 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1429
1430 /*
1431 * Populate the IVAR table and set the ITR values to the
1432 * corresponding register.
1433 */
1434 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1435 q_vector = adapter->q_vector[v_idx];
1436 /* XXX for_each_set_bit(...) */
1437 r_idx = find_first_bit(q_vector->rxr_idx,
1438 adapter->num_rx_queues);
1439
1440 for (i = 0; i < q_vector->rxr_count; i++) {
1441 j = adapter->rx_ring[r_idx]->reg_idx;
1442 ixgbe_set_ivar(adapter, 0, j, v_idx);
1443 r_idx = find_next_bit(q_vector->rxr_idx,
1444 adapter->num_rx_queues,
1445 r_idx + 1);
1446 }
1447 r_idx = find_first_bit(q_vector->txr_idx,
1448 adapter->num_tx_queues);
1449
1450 for (i = 0; i < q_vector->txr_count; i++) {
1451 j = adapter->tx_ring[r_idx]->reg_idx;
1452 ixgbe_set_ivar(adapter, 1, j, v_idx);
1453 r_idx = find_next_bit(q_vector->txr_idx,
1454 adapter->num_tx_queues,
1455 r_idx + 1);
1456 }
1457
1458 if (q_vector->txr_count && !q_vector->rxr_count)
1459 /* tx only */
1460 q_vector->eitr = adapter->tx_eitr_param;
1461 else if (q_vector->rxr_count)
1462 /* rx or mixed */
1463 q_vector->eitr = adapter->rx_eitr_param;
1464
1465 ixgbe_write_eitr(q_vector);
1466 /* If Flow Director is enabled, set interrupt affinity */
1467 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
1468 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)) {
1469 /*
1470 * Allocate the affinity_hint cpumask, assign the mask
1471 * for this vector, and set our affinity_hint for
1472 * this irq.
1473 */
1474 if (!alloc_cpumask_var(&q_vector->affinity_mask,
1475 GFP_KERNEL))
1476 return;
1477 cpumask_set_cpu(v_idx, q_vector->affinity_mask);
1478 irq_set_affinity_hint(adapter->msix_entries[v_idx].vector,
1479 q_vector->affinity_mask);
1480 }
1481 }
1482
1483 switch (adapter->hw.mac.type) {
1484 case ixgbe_mac_82598EB:
1485 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
1486 v_idx);
1487 break;
1488 case ixgbe_mac_82599EB:
1489 ixgbe_set_ivar(adapter, -1, 1, v_idx);
1490 break;
1491
1492 default:
1493 break;
1494 }
1495 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
1496
1497 /* set up to autoclear timer, and the vectors */
1498 mask = IXGBE_EIMS_ENABLE_MASK;
1499 if (adapter->num_vfs)
1500 mask &= ~(IXGBE_EIMS_OTHER |
1501 IXGBE_EIMS_MAILBOX |
1502 IXGBE_EIMS_LSC);
1503 else
1504 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
1505 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
1506 }
1507
1508 enum latency_range {
1509 lowest_latency = 0,
1510 low_latency = 1,
1511 bulk_latency = 2,
1512 latency_invalid = 255
1513 };
1514
1515 /**
1516 * ixgbe_update_itr - update the dynamic ITR value based on statistics
1517 * @adapter: pointer to adapter
1518 * @eitr: eitr setting (ints per sec) to give last timeslice
1519 * @itr_setting: current throttle rate in ints/second
1520 * @packets: the number of packets during this measurement interval
1521 * @bytes: the number of bytes during this measurement interval
1522 *
1523 * Stores a new ITR value based on packets and byte
1524 * counts during the last interrupt. The advantage of per interrupt
1525 * computation is faster updates and more accurate ITR for the current
1526 * traffic pattern. Constants in this function were computed
1527 * based on theoretical maximum wire speed and thresholds were set based
1528 * on testing data as well as attempting to minimize response time
1529 * while increasing bulk throughput.
1530 * this functionality is controlled by the InterruptThrottleRate module
1531 * parameter (see ixgbe_param.c)
1532 **/
1533 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
1534 u32 eitr, u8 itr_setting,
1535 int packets, int bytes)
1536 {
1537 unsigned int retval = itr_setting;
1538 u32 timepassed_us;
1539 u64 bytes_perint;
1540
1541 if (packets == 0)
1542 goto update_itr_done;
1543
1544
1545 /* simple throttlerate management
1546 * 0-20MB/s lowest (100000 ints/s)
1547 * 20-100MB/s low (20000 ints/s)
1548 * 100-1249MB/s bulk (8000 ints/s)
1549 */
1550 /* what was last interrupt timeslice? */
1551 timepassed_us = 1000000/eitr;
1552 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1553
1554 switch (itr_setting) {
1555 case lowest_latency:
1556 if (bytes_perint > adapter->eitr_low)
1557 retval = low_latency;
1558 break;
1559 case low_latency:
1560 if (bytes_perint > adapter->eitr_high)
1561 retval = bulk_latency;
1562 else if (bytes_perint <= adapter->eitr_low)
1563 retval = lowest_latency;
1564 break;
1565 case bulk_latency:
1566 if (bytes_perint <= adapter->eitr_high)
1567 retval = low_latency;
1568 break;
1569 }
1570
1571 update_itr_done:
1572 return retval;
1573 }
1574
1575 /**
1576 * ixgbe_write_eitr - write EITR register in hardware specific way
1577 * @q_vector: structure containing interrupt and ring information
1578 *
1579 * This function is made to be called by ethtool and by the driver
1580 * when it needs to update EITR registers at runtime. Hardware
1581 * specific quirks/differences are taken care of here.
1582 */
1583 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1584 {
1585 struct ixgbe_adapter *adapter = q_vector->adapter;
1586 struct ixgbe_hw *hw = &adapter->hw;
1587 int v_idx = q_vector->v_idx;
1588 u32 itr_reg = EITR_INTS_PER_SEC_TO_REG(q_vector->eitr);
1589
1590 switch (adapter->hw.mac.type) {
1591 case ixgbe_mac_82598EB:
1592 /* must write high and low 16 bits to reset counter */
1593 itr_reg |= (itr_reg << 16);
1594 break;
1595 case ixgbe_mac_82599EB:
1596 /*
1597 * 82599 can support a value of zero, so allow it for
1598 * max interrupt rate, but there is an errata where it can
1599 * not be zero with RSC
1600 */
1601 if (itr_reg == 8 &&
1602 !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
1603 itr_reg = 0;
1604
1605 /*
1606 * set the WDIS bit to not clear the timer bits and cause an
1607 * immediate assertion of the interrupt
1608 */
1609 itr_reg |= IXGBE_EITR_CNT_WDIS;
1610 break;
1611 default:
1612 break;
1613 }
1614 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1615 }
1616
1617 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
1618 {
1619 struct ixgbe_adapter *adapter = q_vector->adapter;
1620 u32 new_itr;
1621 u8 current_itr, ret_itr;
1622 int i, r_idx;
1623 struct ixgbe_ring *rx_ring, *tx_ring;
1624
1625 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1626 for (i = 0; i < q_vector->txr_count; i++) {
1627 tx_ring = adapter->tx_ring[r_idx];
1628 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1629 q_vector->tx_itr,
1630 tx_ring->total_packets,
1631 tx_ring->total_bytes);
1632 /* if the result for this queue would decrease interrupt
1633 * rate for this vector then use that result */
1634 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
1635 q_vector->tx_itr - 1 : ret_itr);
1636 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1637 r_idx + 1);
1638 }
1639
1640 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1641 for (i = 0; i < q_vector->rxr_count; i++) {
1642 rx_ring = adapter->rx_ring[r_idx];
1643 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1644 q_vector->rx_itr,
1645 rx_ring->total_packets,
1646 rx_ring->total_bytes);
1647 /* if the result for this queue would decrease interrupt
1648 * rate for this vector then use that result */
1649 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
1650 q_vector->rx_itr - 1 : ret_itr);
1651 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1652 r_idx + 1);
1653 }
1654
1655 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1656
1657 switch (current_itr) {
1658 /* counts and packets in update_itr are dependent on these numbers */
1659 case lowest_latency:
1660 new_itr = 100000;
1661 break;
1662 case low_latency:
1663 new_itr = 20000; /* aka hwitr = ~200 */
1664 break;
1665 case bulk_latency:
1666 default:
1667 new_itr = 8000;
1668 break;
1669 }
1670
1671 if (new_itr != q_vector->eitr) {
1672 /* do an exponential smoothing */
1673 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1674
1675 /* save the algorithm value here, not the smoothed one */
1676 q_vector->eitr = new_itr;
1677
1678 ixgbe_write_eitr(q_vector);
1679 }
1680 }
1681
1682 /**
1683 * ixgbe_check_overtemp_task - worker thread to check over tempurature
1684 * @work: pointer to work_struct containing our data
1685 **/
1686 static void ixgbe_check_overtemp_task(struct work_struct *work)
1687 {
1688 struct ixgbe_adapter *adapter = container_of(work,
1689 struct ixgbe_adapter,
1690 check_overtemp_task);
1691 struct ixgbe_hw *hw = &adapter->hw;
1692 u32 eicr = adapter->interrupt_event;
1693
1694 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE))
1695 return;
1696
1697 switch (hw->device_id) {
1698 case IXGBE_DEV_ID_82599_T3_LOM: {
1699 u32 autoneg;
1700 bool link_up = false;
1701
1702 if (hw->mac.ops.check_link)
1703 hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
1704
1705 if (((eicr & IXGBE_EICR_GPI_SDP0) && (!link_up)) ||
1706 (eicr & IXGBE_EICR_LSC))
1707 /* Check if this is due to overtemp */
1708 if (hw->phy.ops.check_overtemp(hw) == IXGBE_ERR_OVERTEMP)
1709 break;
1710 return;
1711 }
1712 default:
1713 if (!(eicr & IXGBE_EICR_GPI_SDP0))
1714 return;
1715 break;
1716 }
1717 e_crit(drv,
1718 "Network adapter has been stopped because it has over heated. "
1719 "Restart the computer. If the problem persists, "
1720 "power off the system and replace the adapter\n");
1721 /* write to clear the interrupt */
1722 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP0);
1723 }
1724
1725 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1726 {
1727 struct ixgbe_hw *hw = &adapter->hw;
1728
1729 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1730 (eicr & IXGBE_EICR_GPI_SDP1)) {
1731 e_crit(probe, "Fan has stopped, replace the adapter\n");
1732 /* write to clear the interrupt */
1733 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1734 }
1735 }
1736
1737 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1738 {
1739 struct ixgbe_hw *hw = &adapter->hw;
1740
1741 if (eicr & IXGBE_EICR_GPI_SDP2) {
1742 /* Clear the interrupt */
1743 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1744 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1745 schedule_work(&adapter->sfp_config_module_task);
1746 }
1747
1748 if (eicr & IXGBE_EICR_GPI_SDP1) {
1749 /* Clear the interrupt */
1750 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1751 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1752 schedule_work(&adapter->multispeed_fiber_task);
1753 }
1754 }
1755
1756 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1757 {
1758 struct ixgbe_hw *hw = &adapter->hw;
1759
1760 adapter->lsc_int++;
1761 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1762 adapter->link_check_timeout = jiffies;
1763 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1764 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1765 IXGBE_WRITE_FLUSH(hw);
1766 schedule_work(&adapter->watchdog_task);
1767 }
1768 }
1769
1770 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1771 {
1772 struct net_device *netdev = data;
1773 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1774 struct ixgbe_hw *hw = &adapter->hw;
1775 u32 eicr;
1776
1777 /*
1778 * Workaround for Silicon errata. Use clear-by-write instead
1779 * of clear-by-read. Reading with EICS will return the
1780 * interrupt causes without clearing, which later be done
1781 * with the write to EICR.
1782 */
1783 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1784 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1785
1786 if (eicr & IXGBE_EICR_LSC)
1787 ixgbe_check_lsc(adapter);
1788
1789 if (eicr & IXGBE_EICR_MAILBOX)
1790 ixgbe_msg_task(adapter);
1791
1792 switch (hw->mac.type) {
1793 case ixgbe_mac_82599EB:
1794 /* Handle Flow Director Full threshold interrupt */
1795 if (eicr & IXGBE_EICR_FLOW_DIR) {
1796 int i;
1797 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_FLOW_DIR);
1798 /* Disable transmits before FDIR Re-initialization */
1799 netif_tx_stop_all_queues(netdev);
1800 for (i = 0; i < adapter->num_tx_queues; i++) {
1801 struct ixgbe_ring *tx_ring =
1802 adapter->tx_ring[i];
1803 if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE,
1804 &tx_ring->state))
1805 schedule_work(&adapter->fdir_reinit_task);
1806 }
1807 }
1808 ixgbe_check_sfp_event(adapter, eicr);
1809 if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
1810 ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC))) {
1811 adapter->interrupt_event = eicr;
1812 schedule_work(&adapter->check_overtemp_task);
1813 }
1814 break;
1815 default:
1816 break;
1817 }
1818
1819 ixgbe_check_fan_failure(adapter, eicr);
1820
1821 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1822 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
1823
1824 return IRQ_HANDLED;
1825 }
1826
1827 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1828 u64 qmask)
1829 {
1830 u32 mask;
1831 struct ixgbe_hw *hw = &adapter->hw;
1832
1833 switch (hw->mac.type) {
1834 case ixgbe_mac_82598EB:
1835 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1836 IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
1837 break;
1838 case ixgbe_mac_82599EB:
1839 mask = (qmask & 0xFFFFFFFF);
1840 if (mask)
1841 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
1842 mask = (qmask >> 32);
1843 if (mask)
1844 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
1845 break;
1846 default:
1847 break;
1848 }
1849 /* skip the flush */
1850 }
1851
1852 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1853 u64 qmask)
1854 {
1855 u32 mask;
1856 struct ixgbe_hw *hw = &adapter->hw;
1857
1858 switch (hw->mac.type) {
1859 case ixgbe_mac_82598EB:
1860 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1861 IXGBE_WRITE_REG(hw, IXGBE_EIMC, mask);
1862 break;
1863 case ixgbe_mac_82599EB:
1864 mask = (qmask & 0xFFFFFFFF);
1865 if (mask)
1866 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(0), mask);
1867 mask = (qmask >> 32);
1868 if (mask)
1869 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(1), mask);
1870 break;
1871 default:
1872 break;
1873 }
1874 /* skip the flush */
1875 }
1876
1877 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
1878 {
1879 struct ixgbe_q_vector *q_vector = data;
1880 struct ixgbe_adapter *adapter = q_vector->adapter;
1881 struct ixgbe_ring *tx_ring;
1882 int i, r_idx;
1883
1884 if (!q_vector->txr_count)
1885 return IRQ_HANDLED;
1886
1887 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1888 for (i = 0; i < q_vector->txr_count; i++) {
1889 tx_ring = adapter->tx_ring[r_idx];
1890 tx_ring->total_bytes = 0;
1891 tx_ring->total_packets = 0;
1892 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1893 r_idx + 1);
1894 }
1895
1896 /* EIAM disabled interrupts (on this vector) for us */
1897 napi_schedule(&q_vector->napi);
1898
1899 return IRQ_HANDLED;
1900 }
1901
1902 /**
1903 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
1904 * @irq: unused
1905 * @data: pointer to our q_vector struct for this interrupt vector
1906 **/
1907 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
1908 {
1909 struct ixgbe_q_vector *q_vector = data;
1910 struct ixgbe_adapter *adapter = q_vector->adapter;
1911 struct ixgbe_ring *rx_ring;
1912 int r_idx;
1913 int i;
1914
1915 #ifdef CONFIG_IXGBE_DCA
1916 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1917 ixgbe_update_dca(q_vector);
1918 #endif
1919
1920 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1921 for (i = 0; i < q_vector->rxr_count; i++) {
1922 rx_ring = adapter->rx_ring[r_idx];
1923 rx_ring->total_bytes = 0;
1924 rx_ring->total_packets = 0;
1925 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1926 r_idx + 1);
1927 }
1928
1929 if (!q_vector->rxr_count)
1930 return IRQ_HANDLED;
1931
1932 /* EIAM disabled interrupts (on this vector) for us */
1933 napi_schedule(&q_vector->napi);
1934
1935 return IRQ_HANDLED;
1936 }
1937
1938 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1939 {
1940 struct ixgbe_q_vector *q_vector = data;
1941 struct ixgbe_adapter *adapter = q_vector->adapter;
1942 struct ixgbe_ring *ring;
1943 int r_idx;
1944 int i;
1945
1946 if (!q_vector->txr_count && !q_vector->rxr_count)
1947 return IRQ_HANDLED;
1948
1949 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1950 for (i = 0; i < q_vector->txr_count; i++) {
1951 ring = adapter->tx_ring[r_idx];
1952 ring->total_bytes = 0;
1953 ring->total_packets = 0;
1954 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1955 r_idx + 1);
1956 }
1957
1958 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1959 for (i = 0; i < q_vector->rxr_count; i++) {
1960 ring = adapter->rx_ring[r_idx];
1961 ring->total_bytes = 0;
1962 ring->total_packets = 0;
1963 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1964 r_idx + 1);
1965 }
1966
1967 /* EIAM disabled interrupts (on this vector) for us */
1968 napi_schedule(&q_vector->napi);
1969
1970 return IRQ_HANDLED;
1971 }
1972
1973 /**
1974 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1975 * @napi: napi struct with our devices info in it
1976 * @budget: amount of work driver is allowed to do this pass, in packets
1977 *
1978 * This function is optimized for cleaning one queue only on a single
1979 * q_vector!!!
1980 **/
1981 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1982 {
1983 struct ixgbe_q_vector *q_vector =
1984 container_of(napi, struct ixgbe_q_vector, napi);
1985 struct ixgbe_adapter *adapter = q_vector->adapter;
1986 struct ixgbe_ring *rx_ring = NULL;
1987 int work_done = 0;
1988 long r_idx;
1989
1990 #ifdef CONFIG_IXGBE_DCA
1991 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1992 ixgbe_update_dca(q_vector);
1993 #endif
1994
1995 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1996 rx_ring = adapter->rx_ring[r_idx];
1997
1998 ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
1999
2000 /* If all Rx work done, exit the polling mode */
2001 if (work_done < budget) {
2002 napi_complete(napi);
2003 if (adapter->rx_itr_setting & 1)
2004 ixgbe_set_itr_msix(q_vector);
2005 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2006 ixgbe_irq_enable_queues(adapter,
2007 ((u64)1 << q_vector->v_idx));
2008 }
2009
2010 return work_done;
2011 }
2012
2013 /**
2014 * ixgbe_clean_rxtx_many - msix (aka one shot) rx clean routine
2015 * @napi: napi struct with our devices info in it
2016 * @budget: amount of work driver is allowed to do this pass, in packets
2017 *
2018 * This function will clean more than one rx queue associated with a
2019 * q_vector.
2020 **/
2021 static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
2022 {
2023 struct ixgbe_q_vector *q_vector =
2024 container_of(napi, struct ixgbe_q_vector, napi);
2025 struct ixgbe_adapter *adapter = q_vector->adapter;
2026 struct ixgbe_ring *ring = NULL;
2027 int work_done = 0, i;
2028 long r_idx;
2029 bool tx_clean_complete = true;
2030
2031 #ifdef CONFIG_IXGBE_DCA
2032 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2033 ixgbe_update_dca(q_vector);
2034 #endif
2035
2036 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
2037 for (i = 0; i < q_vector->txr_count; i++) {
2038 ring = adapter->tx_ring[r_idx];
2039 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
2040 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
2041 r_idx + 1);
2042 }
2043
2044 /* attempt to distribute budget to each queue fairly, but don't allow
2045 * the budget to go below 1 because we'll exit polling */
2046 budget /= (q_vector->rxr_count ?: 1);
2047 budget = max(budget, 1);
2048 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
2049 for (i = 0; i < q_vector->rxr_count; i++) {
2050 ring = adapter->rx_ring[r_idx];
2051 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
2052 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
2053 r_idx + 1);
2054 }
2055
2056 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
2057 ring = adapter->rx_ring[r_idx];
2058 /* If all Rx work done, exit the polling mode */
2059 if (work_done < budget) {
2060 napi_complete(napi);
2061 if (adapter->rx_itr_setting & 1)
2062 ixgbe_set_itr_msix(q_vector);
2063 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2064 ixgbe_irq_enable_queues(adapter,
2065 ((u64)1 << q_vector->v_idx));
2066 return 0;
2067 }
2068
2069 return work_done;
2070 }
2071
2072 /**
2073 * ixgbe_clean_txonly - msix (aka one shot) tx clean routine
2074 * @napi: napi struct with our devices info in it
2075 * @budget: amount of work driver is allowed to do this pass, in packets
2076 *
2077 * This function is optimized for cleaning one queue only on a single
2078 * q_vector!!!
2079 **/
2080 static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
2081 {
2082 struct ixgbe_q_vector *q_vector =
2083 container_of(napi, struct ixgbe_q_vector, napi);
2084 struct ixgbe_adapter *adapter = q_vector->adapter;
2085 struct ixgbe_ring *tx_ring = NULL;
2086 int work_done = 0;
2087 long r_idx;
2088
2089 #ifdef CONFIG_IXGBE_DCA
2090 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2091 ixgbe_update_dca(q_vector);
2092 #endif
2093
2094 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
2095 tx_ring = adapter->tx_ring[r_idx];
2096
2097 if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
2098 work_done = budget;
2099
2100 /* If all Tx work done, exit the polling mode */
2101 if (work_done < budget) {
2102 napi_complete(napi);
2103 if (adapter->tx_itr_setting & 1)
2104 ixgbe_set_itr_msix(q_vector);
2105 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2106 ixgbe_irq_enable_queues(adapter,
2107 ((u64)1 << q_vector->v_idx));
2108 }
2109
2110 return work_done;
2111 }
2112
2113 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
2114 int r_idx)
2115 {
2116 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2117
2118 set_bit(r_idx, q_vector->rxr_idx);
2119 q_vector->rxr_count++;
2120 }
2121
2122 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
2123 int t_idx)
2124 {
2125 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2126
2127 set_bit(t_idx, q_vector->txr_idx);
2128 q_vector->txr_count++;
2129 }
2130
2131 /**
2132 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
2133 * @adapter: board private structure to initialize
2134 * @vectors: allotted vector count for descriptor rings
2135 *
2136 * This function maps descriptor rings to the queue-specific vectors
2137 * we were allotted through the MSI-X enabling code. Ideally, we'd have
2138 * one vector per ring/queue, but on a constrained vector budget, we
2139 * group the rings as "efficiently" as possible. You would add new
2140 * mapping configurations in here.
2141 **/
2142 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
2143 int vectors)
2144 {
2145 int v_start = 0;
2146 int rxr_idx = 0, txr_idx = 0;
2147 int rxr_remaining = adapter->num_rx_queues;
2148 int txr_remaining = adapter->num_tx_queues;
2149 int i, j;
2150 int rqpv, tqpv;
2151 int err = 0;
2152
2153 /* No mapping required if MSI-X is disabled. */
2154 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2155 goto out;
2156
2157 /*
2158 * The ideal configuration...
2159 * We have enough vectors to map one per queue.
2160 */
2161 if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
2162 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
2163 map_vector_to_rxq(adapter, v_start, rxr_idx);
2164
2165 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
2166 map_vector_to_txq(adapter, v_start, txr_idx);
2167
2168 goto out;
2169 }
2170
2171 /*
2172 * If we don't have enough vectors for a 1-to-1
2173 * mapping, we'll have to group them so there are
2174 * multiple queues per vector.
2175 */
2176 /* Re-adjusting *qpv takes care of the remainder. */
2177 for (i = v_start; i < vectors; i++) {
2178 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
2179 for (j = 0; j < rqpv; j++) {
2180 map_vector_to_rxq(adapter, i, rxr_idx);
2181 rxr_idx++;
2182 rxr_remaining--;
2183 }
2184 }
2185 for (i = v_start; i < vectors; i++) {
2186 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
2187 for (j = 0; j < tqpv; j++) {
2188 map_vector_to_txq(adapter, i, txr_idx);
2189 txr_idx++;
2190 txr_remaining--;
2191 }
2192 }
2193
2194 out:
2195 return err;
2196 }
2197
2198 /**
2199 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2200 * @adapter: board private structure
2201 *
2202 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2203 * interrupts from the kernel.
2204 **/
2205 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2206 {
2207 struct net_device *netdev = adapter->netdev;
2208 irqreturn_t (*handler)(int, void *);
2209 int i, vector, q_vectors, err;
2210 int ri = 0, ti = 0;
2211
2212 /* Decrement for Other and TCP Timer vectors */
2213 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2214
2215 /* Map the Tx/Rx rings to the vectors we were allotted. */
2216 err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
2217 if (err)
2218 goto out;
2219
2220 #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
2221 (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
2222 &ixgbe_msix_clean_many)
2223 for (vector = 0; vector < q_vectors; vector++) {
2224 handler = SET_HANDLER(adapter->q_vector[vector]);
2225
2226 if (handler == &ixgbe_msix_clean_rx) {
2227 sprintf(adapter->name[vector], "%s-%s-%d",
2228 netdev->name, "rx", ri++);
2229 } else if (handler == &ixgbe_msix_clean_tx) {
2230 sprintf(adapter->name[vector], "%s-%s-%d",
2231 netdev->name, "tx", ti++);
2232 } else {
2233 sprintf(adapter->name[vector], "%s-%s-%d",
2234 netdev->name, "TxRx", ri++);
2235 ti++;
2236 }
2237
2238 err = request_irq(adapter->msix_entries[vector].vector,
2239 handler, 0, adapter->name[vector],
2240 adapter->q_vector[vector]);
2241 if (err) {
2242 e_err(probe, "request_irq failed for MSIX interrupt "
2243 "Error: %d\n", err);
2244 goto free_queue_irqs;
2245 }
2246 }
2247
2248 sprintf(adapter->name[vector], "%s:lsc", netdev->name);
2249 err = request_irq(adapter->msix_entries[vector].vector,
2250 ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
2251 if (err) {
2252 e_err(probe, "request_irq for msix_lsc failed: %d\n", err);
2253 goto free_queue_irqs;
2254 }
2255
2256 return 0;
2257
2258 free_queue_irqs:
2259 for (i = vector - 1; i >= 0; i--)
2260 free_irq(adapter->msix_entries[--vector].vector,
2261 adapter->q_vector[i]);
2262 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2263 pci_disable_msix(adapter->pdev);
2264 kfree(adapter->msix_entries);
2265 adapter->msix_entries = NULL;
2266 out:
2267 return err;
2268 }
2269
2270 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
2271 {
2272 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2273 u8 current_itr;
2274 u32 new_itr = q_vector->eitr;
2275 struct ixgbe_ring *rx_ring = adapter->rx_ring[0];
2276 struct ixgbe_ring *tx_ring = adapter->tx_ring[0];
2277
2278 q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
2279 q_vector->tx_itr,
2280 tx_ring->total_packets,
2281 tx_ring->total_bytes);
2282 q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
2283 q_vector->rx_itr,
2284 rx_ring->total_packets,
2285 rx_ring->total_bytes);
2286
2287 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
2288
2289 switch (current_itr) {
2290 /* counts and packets in update_itr are dependent on these numbers */
2291 case lowest_latency:
2292 new_itr = 100000;
2293 break;
2294 case low_latency:
2295 new_itr = 20000; /* aka hwitr = ~200 */
2296 break;
2297 case bulk_latency:
2298 new_itr = 8000;
2299 break;
2300 default:
2301 break;
2302 }
2303
2304 if (new_itr != q_vector->eitr) {
2305 /* do an exponential smoothing */
2306 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
2307
2308 /* save the algorithm value here, not the smoothed one */
2309 q_vector->eitr = new_itr;
2310
2311 ixgbe_write_eitr(q_vector);
2312 }
2313 }
2314
2315 /**
2316 * ixgbe_irq_enable - Enable default interrupt generation settings
2317 * @adapter: board private structure
2318 **/
2319 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
2320 bool flush)
2321 {
2322 u32 mask;
2323
2324 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
2325 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
2326 mask |= IXGBE_EIMS_GPI_SDP0;
2327 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
2328 mask |= IXGBE_EIMS_GPI_SDP1;
2329 switch (adapter->hw.mac.type) {
2330 case ixgbe_mac_82599EB:
2331 mask |= IXGBE_EIMS_ECC;
2332 mask |= IXGBE_EIMS_GPI_SDP1;
2333 mask |= IXGBE_EIMS_GPI_SDP2;
2334 if (adapter->num_vfs)
2335 mask |= IXGBE_EIMS_MAILBOX;
2336 break;
2337 default:
2338 break;
2339 }
2340 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
2341 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
2342 mask |= IXGBE_EIMS_FLOW_DIR;
2343
2344 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
2345 if (queues)
2346 ixgbe_irq_enable_queues(adapter, ~0);
2347 if (flush)
2348 IXGBE_WRITE_FLUSH(&adapter->hw);
2349
2350 if (adapter->num_vfs > 32) {
2351 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
2352 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
2353 }
2354 }
2355
2356 /**
2357 * ixgbe_intr - legacy mode Interrupt Handler
2358 * @irq: interrupt number
2359 * @data: pointer to a network interface device structure
2360 **/
2361 static irqreturn_t ixgbe_intr(int irq, void *data)
2362 {
2363 struct net_device *netdev = data;
2364 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2365 struct ixgbe_hw *hw = &adapter->hw;
2366 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2367 u32 eicr;
2368
2369 /*
2370 * Workaround for silicon errata on 82598. Mask the interrupts
2371 * before the read of EICR.
2372 */
2373 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2374
2375 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2376 * therefore no explict interrupt disable is necessary */
2377 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2378 if (!eicr) {
2379 /*
2380 * shared interrupt alert!
2381 * make sure interrupts are enabled because the read will
2382 * have disabled interrupts due to EIAM
2383 * finish the workaround of silicon errata on 82598. Unmask
2384 * the interrupt that we masked before the EICR read.
2385 */
2386 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2387 ixgbe_irq_enable(adapter, true, true);
2388 return IRQ_NONE; /* Not our interrupt */
2389 }
2390
2391 if (eicr & IXGBE_EICR_LSC)
2392 ixgbe_check_lsc(adapter);
2393
2394 switch (hw->mac.type) {
2395 case ixgbe_mac_82599EB:
2396 ixgbe_check_sfp_event(adapter, eicr);
2397 if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
2398 ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC))) {
2399 adapter->interrupt_event = eicr;
2400 schedule_work(&adapter->check_overtemp_task);
2401 }
2402 break;
2403 default:
2404 break;
2405 }
2406
2407 ixgbe_check_fan_failure(adapter, eicr);
2408
2409 if (napi_schedule_prep(&(q_vector->napi))) {
2410 adapter->tx_ring[0]->total_packets = 0;
2411 adapter->tx_ring[0]->total_bytes = 0;
2412 adapter->rx_ring[0]->total_packets = 0;
2413 adapter->rx_ring[0]->total_bytes = 0;
2414 /* would disable interrupts here but EIAM disabled it */
2415 __napi_schedule(&(q_vector->napi));
2416 }
2417
2418 /*
2419 * re-enable link(maybe) and non-queue interrupts, no flush.
2420 * ixgbe_poll will re-enable the queue interrupts
2421 */
2422
2423 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2424 ixgbe_irq_enable(adapter, false, false);
2425
2426 return IRQ_HANDLED;
2427 }
2428
2429 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
2430 {
2431 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2432
2433 for (i = 0; i < q_vectors; i++) {
2434 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
2435 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
2436 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
2437 q_vector->rxr_count = 0;
2438 q_vector->txr_count = 0;
2439 }
2440 }
2441
2442 /**
2443 * ixgbe_request_irq - initialize interrupts
2444 * @adapter: board private structure
2445 *
2446 * Attempts to configure interrupts using the best available
2447 * capabilities of the hardware and kernel.
2448 **/
2449 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
2450 {
2451 struct net_device *netdev = adapter->netdev;
2452 int err;
2453
2454 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2455 err = ixgbe_request_msix_irqs(adapter);
2456 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
2457 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
2458 netdev->name, netdev);
2459 } else {
2460 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
2461 netdev->name, netdev);
2462 }
2463
2464 if (err)
2465 e_err(probe, "request_irq failed, Error %d\n", err);
2466
2467 return err;
2468 }
2469
2470 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
2471 {
2472 struct net_device *netdev = adapter->netdev;
2473
2474 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2475 int i, q_vectors;
2476
2477 q_vectors = adapter->num_msix_vectors;
2478
2479 i = q_vectors - 1;
2480 free_irq(adapter->msix_entries[i].vector, netdev);
2481
2482 i--;
2483 for (; i >= 0; i--) {
2484 free_irq(adapter->msix_entries[i].vector,
2485 adapter->q_vector[i]);
2486 }
2487
2488 ixgbe_reset_q_vectors(adapter);
2489 } else {
2490 free_irq(adapter->pdev->irq, netdev);
2491 }
2492 }
2493
2494 /**
2495 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
2496 * @adapter: board private structure
2497 **/
2498 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
2499 {
2500 switch (adapter->hw.mac.type) {
2501 case ixgbe_mac_82598EB:
2502 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
2503 break;
2504 case ixgbe_mac_82599EB:
2505 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
2506 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
2507 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
2508 if (adapter->num_vfs > 32)
2509 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
2510 break;
2511 default:
2512 break;
2513 }
2514 IXGBE_WRITE_FLUSH(&adapter->hw);
2515 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2516 int i;
2517 for (i = 0; i < adapter->num_msix_vectors; i++)
2518 synchronize_irq(adapter->msix_entries[i].vector);
2519 } else {
2520 synchronize_irq(adapter->pdev->irq);
2521 }
2522 }
2523
2524 /**
2525 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
2526 *
2527 **/
2528 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
2529 {
2530 struct ixgbe_hw *hw = &adapter->hw;
2531
2532 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
2533 EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr_param));
2534
2535 ixgbe_set_ivar(adapter, 0, 0, 0);
2536 ixgbe_set_ivar(adapter, 1, 0, 0);
2537
2538 map_vector_to_rxq(adapter, 0, 0);
2539 map_vector_to_txq(adapter, 0, 0);
2540
2541 e_info(hw, "Legacy interrupt IVAR setup done\n");
2542 }
2543
2544 /**
2545 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
2546 * @adapter: board private structure
2547 * @ring: structure containing ring specific data
2548 *
2549 * Configure the Tx descriptor ring after a reset.
2550 **/
2551 void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
2552 struct ixgbe_ring *ring)
2553 {
2554 struct ixgbe_hw *hw = &adapter->hw;
2555 u64 tdba = ring->dma;
2556 int wait_loop = 10;
2557 u32 txdctl;
2558 u16 reg_idx = ring->reg_idx;
2559
2560 /* disable queue to avoid issues while updating state */
2561 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2562 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx),
2563 txdctl & ~IXGBE_TXDCTL_ENABLE);
2564 IXGBE_WRITE_FLUSH(hw);
2565
2566 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
2567 (tdba & DMA_BIT_MASK(32)));
2568 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
2569 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
2570 ring->count * sizeof(union ixgbe_adv_tx_desc));
2571 IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
2572 IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
2573 ring->tail = hw->hw_addr + IXGBE_TDT(reg_idx);
2574
2575 /* configure fetching thresholds */
2576 if (adapter->rx_itr_setting == 0) {
2577 /* cannot set wthresh when itr==0 */
2578 txdctl &= ~0x007F0000;
2579 } else {
2580 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
2581 txdctl |= (8 << 16);
2582 }
2583 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2584 /* PThresh workaround for Tx hang with DFP enabled. */
2585 txdctl |= 32;
2586 }
2587
2588 /* reinitialize flowdirector state */
2589 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
2590 adapter->atr_sample_rate) {
2591 ring->atr_sample_rate = adapter->atr_sample_rate;
2592 ring->atr_count = 0;
2593 set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state);
2594 } else {
2595 ring->atr_sample_rate = 0;
2596 }
2597
2598 /* enable queue */
2599 txdctl |= IXGBE_TXDCTL_ENABLE;
2600 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
2601
2602 /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2603 if (hw->mac.type == ixgbe_mac_82598EB &&
2604 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2605 return;
2606
2607 /* poll to verify queue is enabled */
2608 do {
2609 msleep(1);
2610 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2611 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
2612 if (!wait_loop)
2613 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx);
2614 }
2615
2616 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
2617 {
2618 struct ixgbe_hw *hw = &adapter->hw;
2619 u32 rttdcs;
2620 u32 mask;
2621
2622 if (hw->mac.type == ixgbe_mac_82598EB)
2623 return;
2624
2625 /* disable the arbiter while setting MTQC */
2626 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
2627 rttdcs |= IXGBE_RTTDCS_ARBDIS;
2628 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2629
2630 /* set transmit pool layout */
2631 mask = (IXGBE_FLAG_SRIOV_ENABLED | IXGBE_FLAG_DCB_ENABLED);
2632 switch (adapter->flags & mask) {
2633
2634 case (IXGBE_FLAG_SRIOV_ENABLED):
2635 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2636 (IXGBE_MTQC_VT_ENA | IXGBE_MTQC_64VF));
2637 break;
2638
2639 case (IXGBE_FLAG_DCB_ENABLED):
2640 /* We enable 8 traffic classes, DCB only */
2641 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2642 (IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ));
2643 break;
2644
2645 default:
2646 IXGBE_WRITE_REG(hw, IXGBE_MTQC, IXGBE_MTQC_64Q_1PB);
2647 break;
2648 }
2649
2650 /* re-enable the arbiter */
2651 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
2652 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2653 }
2654
2655 /**
2656 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
2657 * @adapter: board private structure
2658 *
2659 * Configure the Tx unit of the MAC after a reset.
2660 **/
2661 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
2662 {
2663 struct ixgbe_hw *hw = &adapter->hw;
2664 u32 dmatxctl;
2665 u32 i;
2666
2667 ixgbe_setup_mtqc(adapter);
2668
2669 if (hw->mac.type != ixgbe_mac_82598EB) {
2670 /* DMATXCTL.EN must be before Tx queues are enabled */
2671 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2672 dmatxctl |= IXGBE_DMATXCTL_TE;
2673 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2674 }
2675
2676 /* Setup the HW Tx Head and Tail descriptor pointers */
2677 for (i = 0; i < adapter->num_tx_queues; i++)
2678 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
2679 }
2680
2681 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
2682
2683 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
2684 struct ixgbe_ring *rx_ring)
2685 {
2686 u32 srrctl;
2687 int index = rx_ring->reg_idx;
2688
2689 switch (adapter->hw.mac.type) {
2690 case ixgbe_mac_82598EB: {
2691 struct ixgbe_ring_feature *feature = adapter->ring_feature;
2692 const int mask = feature[RING_F_RSS].mask;
2693 index = index & mask;
2694 }
2695 break;
2696 case ixgbe_mac_82599EB:
2697 default:
2698 break;
2699 }
2700
2701 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
2702
2703 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
2704 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
2705 if (adapter->num_vfs)
2706 srrctl |= IXGBE_SRRCTL_DROP_EN;
2707
2708 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
2709 IXGBE_SRRCTL_BSIZEHDR_MASK;
2710
2711 if (ring_is_ps_enabled(rx_ring)) {
2712 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
2713 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2714 #else
2715 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2716 #endif
2717 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
2718 } else {
2719 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
2720 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2721 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
2722 }
2723
2724 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
2725 }
2726
2727 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
2728 {
2729 struct ixgbe_hw *hw = &adapter->hw;
2730 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2731 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2732 0x6A3E67EA, 0x14364D17, 0x3BED200D};
2733 u32 mrqc = 0, reta = 0;
2734 u32 rxcsum;
2735 int i, j;
2736 int mask;
2737
2738 /* Fill out hash function seeds */
2739 for (i = 0; i < 10; i++)
2740 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2741
2742 /* Fill out redirection table */
2743 for (i = 0, j = 0; i < 128; i++, j++) {
2744 if (j == adapter->ring_feature[RING_F_RSS].indices)
2745 j = 0;
2746 /* reta = 4-byte sliding window of
2747 * 0x00..(indices-1)(indices-1)00..etc. */
2748 reta = (reta << 8) | (j * 0x11);
2749 if ((i & 3) == 3)
2750 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2751 }
2752
2753 /* Disable indicating checksum in descriptor, enables RSS hash */
2754 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2755 rxcsum |= IXGBE_RXCSUM_PCSD;
2756 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2757
2758 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
2759 mask = adapter->flags & IXGBE_FLAG_RSS_ENABLED;
2760 else
2761 mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
2762 #ifdef CONFIG_IXGBE_DCB
2763 | IXGBE_FLAG_DCB_ENABLED
2764 #endif
2765 | IXGBE_FLAG_SRIOV_ENABLED
2766 );
2767
2768 switch (mask) {
2769 case (IXGBE_FLAG_RSS_ENABLED):
2770 mrqc = IXGBE_MRQC_RSSEN;
2771 break;
2772 case (IXGBE_FLAG_SRIOV_ENABLED):
2773 mrqc = IXGBE_MRQC_VMDQEN;
2774 break;
2775 #ifdef CONFIG_IXGBE_DCB
2776 case (IXGBE_FLAG_DCB_ENABLED):
2777 mrqc = IXGBE_MRQC_RT8TCEN;
2778 break;
2779 #endif /* CONFIG_IXGBE_DCB */
2780 default:
2781 break;
2782 }
2783
2784 /* Perform hash on these packet types */
2785 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2786 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2787 | IXGBE_MRQC_RSS_FIELD_IPV6
2788 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
2789
2790 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2791 }
2792
2793 /**
2794 * ixgbe_configure_rscctl - enable RSC for the indicated ring
2795 * @adapter: address of board private structure
2796 * @index: index of ring to set
2797 **/
2798 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
2799 struct ixgbe_ring *ring)
2800 {
2801 struct ixgbe_hw *hw = &adapter->hw;
2802 u32 rscctrl;
2803 int rx_buf_len;
2804 u16 reg_idx = ring->reg_idx;
2805
2806 if (!ring_is_rsc_enabled(ring))
2807 return;
2808
2809 rx_buf_len = ring->rx_buf_len;
2810 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
2811 rscctrl |= IXGBE_RSCCTL_RSCEN;
2812 /*
2813 * we must limit the number of descriptors so that the
2814 * total size of max desc * buf_len is not greater
2815 * than 65535
2816 */
2817 if (ring_is_ps_enabled(ring)) {
2818 #if (MAX_SKB_FRAGS > 16)
2819 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2820 #elif (MAX_SKB_FRAGS > 8)
2821 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2822 #elif (MAX_SKB_FRAGS > 4)
2823 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2824 #else
2825 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2826 #endif
2827 } else {
2828 if (rx_buf_len < IXGBE_RXBUFFER_4096)
2829 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2830 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
2831 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2832 else
2833 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2834 }
2835 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
2836 }
2837
2838 /**
2839 * ixgbe_set_uta - Set unicast filter table address
2840 * @adapter: board private structure
2841 *
2842 * The unicast table address is a register array of 32-bit registers.
2843 * The table is meant to be used in a way similar to how the MTA is used
2844 * however due to certain limitations in the hardware it is necessary to
2845 * set all the hash bits to 1 and use the VMOLR ROPE bit as a promiscuous
2846 * enable bit to allow vlan tag stripping when promiscuous mode is enabled
2847 **/
2848 static void ixgbe_set_uta(struct ixgbe_adapter *adapter)
2849 {
2850 struct ixgbe_hw *hw = &adapter->hw;
2851 int i;
2852
2853 /* The UTA table only exists on 82599 hardware and newer */
2854 if (hw->mac.type < ixgbe_mac_82599EB)
2855 return;
2856
2857 /* we only need to do this if VMDq is enabled */
2858 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
2859 return;
2860
2861 for (i = 0; i < 128; i++)
2862 IXGBE_WRITE_REG(hw, IXGBE_UTA(i), ~0);
2863 }
2864
2865 #define IXGBE_MAX_RX_DESC_POLL 10
2866 static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
2867 struct ixgbe_ring *ring)
2868 {
2869 struct ixgbe_hw *hw = &adapter->hw;
2870 int reg_idx = ring->reg_idx;
2871 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
2872 u32 rxdctl;
2873
2874 /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2875 if (hw->mac.type == ixgbe_mac_82598EB &&
2876 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2877 return;
2878
2879 do {
2880 msleep(1);
2881 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2882 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
2883
2884 if (!wait_loop) {
2885 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
2886 "the polling period\n", reg_idx);
2887 }
2888 }
2889
2890 void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
2891 struct ixgbe_ring *ring)
2892 {
2893 struct ixgbe_hw *hw = &adapter->hw;
2894 u64 rdba = ring->dma;
2895 u32 rxdctl;
2896 u16 reg_idx = ring->reg_idx;
2897
2898 /* disable queue to avoid issues while updating state */
2899 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2900 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx),
2901 rxdctl & ~IXGBE_RXDCTL_ENABLE);
2902 IXGBE_WRITE_FLUSH(hw);
2903
2904 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
2905 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
2906 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
2907 ring->count * sizeof(union ixgbe_adv_rx_desc));
2908 IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
2909 IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
2910 ring->tail = hw->hw_addr + IXGBE_RDT(reg_idx);
2911
2912 ixgbe_configure_srrctl(adapter, ring);
2913 ixgbe_configure_rscctl(adapter, ring);
2914
2915 if (hw->mac.type == ixgbe_mac_82598EB) {
2916 /*
2917 * enable cache line friendly hardware writes:
2918 * PTHRESH=32 descriptors (half the internal cache),
2919 * this also removes ugly rx_no_buffer_count increment
2920 * HTHRESH=4 descriptors (to minimize latency on fetch)
2921 * WTHRESH=8 burst writeback up to two cache lines
2922 */
2923 rxdctl &= ~0x3FFFFF;
2924 rxdctl |= 0x080420;
2925 }
2926
2927 /* enable receive descriptor ring */
2928 rxdctl |= IXGBE_RXDCTL_ENABLE;
2929 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
2930
2931 ixgbe_rx_desc_queue_enable(adapter, ring);
2932 ixgbe_alloc_rx_buffers(ring, IXGBE_DESC_UNUSED(ring));
2933 }
2934
2935 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
2936 {
2937 struct ixgbe_hw *hw = &adapter->hw;
2938 int p;
2939
2940 /* PSRTYPE must be initialized in non 82598 adapters */
2941 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
2942 IXGBE_PSRTYPE_UDPHDR |
2943 IXGBE_PSRTYPE_IPV4HDR |
2944 IXGBE_PSRTYPE_L2HDR |
2945 IXGBE_PSRTYPE_IPV6HDR;
2946
2947 if (hw->mac.type == ixgbe_mac_82598EB)
2948 return;
2949
2950 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED)
2951 psrtype |= (adapter->num_rx_queues_per_pool << 29);
2952
2953 for (p = 0; p < adapter->num_rx_pools; p++)
2954 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(adapter->num_vfs + p),
2955 psrtype);
2956 }
2957
2958 static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
2959 {
2960 struct ixgbe_hw *hw = &adapter->hw;
2961 u32 gcr_ext;
2962 u32 vt_reg_bits;
2963 u32 reg_offset, vf_shift;
2964 u32 vmdctl;
2965
2966 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
2967 return;
2968
2969 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
2970 vt_reg_bits = IXGBE_VMD_CTL_VMDQ_EN | IXGBE_VT_CTL_REPLEN;
2971 vt_reg_bits |= (adapter->num_vfs << IXGBE_VT_CTL_POOL_SHIFT);
2972 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl | vt_reg_bits);
2973
2974 vf_shift = adapter->num_vfs % 32;
2975 reg_offset = (adapter->num_vfs > 32) ? 1 : 0;
2976
2977 /* Enable only the PF's pool for Tx/Rx */
2978 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (1 << vf_shift));
2979 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), 0);
2980 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (1 << vf_shift));
2981 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), 0);
2982 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
2983
2984 /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
2985 hw->mac.ops.set_vmdq(hw, 0, adapter->num_vfs);
2986
2987 /*
2988 * Set up VF register offsets for selected VT Mode,
2989 * i.e. 32 or 64 VFs for SR-IOV
2990 */
2991 gcr_ext = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
2992 gcr_ext |= IXGBE_GCR_EXT_MSIX_EN;
2993 gcr_ext |= IXGBE_GCR_EXT_VT_MODE_64;
2994 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
2995
2996 /* enable Tx loopback for VF/PF communication */
2997 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
2998 }
2999
3000 static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
3001 {
3002 struct ixgbe_hw *hw = &adapter->hw;
3003 struct net_device *netdev = adapter->netdev;
3004 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3005 int rx_buf_len;
3006 struct ixgbe_ring *rx_ring;
3007 int i;
3008 u32 mhadd, hlreg0;
3009
3010 /* Decide whether to use packet split mode or not */
3011 /* Do not use packet split if we're in SR-IOV Mode */
3012 if (!adapter->num_vfs)
3013 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
3014
3015 /* Set the RX buffer length according to the mode */
3016 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
3017 rx_buf_len = IXGBE_RX_HDR_SIZE;
3018 } else {
3019 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
3020 (netdev->mtu <= ETH_DATA_LEN))
3021 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3022 else
3023 rx_buf_len = ALIGN(max_frame + VLAN_HLEN, 1024);
3024 }
3025
3026 #ifdef IXGBE_FCOE
3027 /* adjust max frame to be able to do baby jumbo for FCoE */
3028 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
3029 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
3030 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
3031
3032 #endif /* IXGBE_FCOE */
3033 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
3034 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
3035 mhadd &= ~IXGBE_MHADD_MFS_MASK;
3036 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
3037
3038 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
3039 }
3040
3041 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
3042 /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
3043 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
3044 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
3045
3046 /*
3047 * Setup the HW Rx Head and Tail Descriptor Pointers and
3048 * the Base and Length of the Rx Descriptor Ring
3049 */
3050 for (i = 0; i < adapter->num_rx_queues; i++) {
3051 rx_ring = adapter->rx_ring[i];
3052 rx_ring->rx_buf_len = rx_buf_len;
3053
3054 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
3055 set_ring_ps_enabled(rx_ring);
3056 else
3057 clear_ring_ps_enabled(rx_ring);
3058
3059 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
3060 set_ring_rsc_enabled(rx_ring);
3061 else
3062 clear_ring_rsc_enabled(rx_ring);
3063
3064 #ifdef IXGBE_FCOE
3065 if (netdev->features & NETIF_F_FCOE_MTU) {
3066 struct ixgbe_ring_feature *f;
3067 f = &adapter->ring_feature[RING_F_FCOE];
3068 if ((i >= f->mask) && (i < f->mask + f->indices)) {
3069 clear_ring_ps_enabled(rx_ring);
3070 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
3071 rx_ring->rx_buf_len =
3072 IXGBE_FCOE_JUMBO_FRAME_SIZE;
3073 } else if (!ring_is_rsc_enabled(rx_ring) &&
3074 !ring_is_ps_enabled(rx_ring)) {
3075 rx_ring->rx_buf_len =
3076 IXGBE_FCOE_JUMBO_FRAME_SIZE;
3077 }
3078 }
3079 #endif /* IXGBE_FCOE */
3080 }
3081 }
3082
3083 static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
3084 {
3085 struct ixgbe_hw *hw = &adapter->hw;
3086 u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
3087
3088 switch (hw->mac.type) {
3089 case ixgbe_mac_82598EB:
3090 /*
3091 * For VMDq support of different descriptor types or
3092 * buffer sizes through the use of multiple SRRCTL
3093 * registers, RDRXCTL.MVMEN must be set to 1
3094 *
3095 * also, the manual doesn't mention it clearly but DCA hints
3096 * will only use queue 0's tags unless this bit is set. Side
3097 * effects of setting this bit are only that SRRCTL must be
3098 * fully programmed [0..15]
3099 */
3100 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
3101 break;
3102 case ixgbe_mac_82599EB:
3103 /* Disable RSC for ACK packets */
3104 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
3105 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
3106 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
3107 /* hardware requires some bits to be set by default */
3108 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
3109 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
3110 break;
3111 default:
3112 /* We should do nothing since we don't know this hardware */
3113 return;
3114 }
3115
3116 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
3117 }
3118
3119 /**
3120 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
3121 * @adapter: board private structure
3122 *
3123 * Configure the Rx unit of the MAC after a reset.
3124 **/
3125 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
3126 {
3127 struct ixgbe_hw *hw = &adapter->hw;
3128 int i;
3129 u32 rxctrl;
3130
3131 /* disable receives while setting up the descriptors */
3132 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3133 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3134
3135 ixgbe_setup_psrtype(adapter);
3136 ixgbe_setup_rdrxctl(adapter);
3137
3138 /* Program registers for the distribution of queues */
3139 ixgbe_setup_mrqc(adapter);
3140
3141 ixgbe_set_uta(adapter);
3142
3143 /* set_rx_buffer_len must be called before ring initialization */
3144 ixgbe_set_rx_buffer_len(adapter);
3145
3146 /*
3147 * Setup the HW Rx Head and Tail Descriptor Pointers and
3148 * the Base and Length of the Rx Descriptor Ring
3149 */
3150 for (i = 0; i < adapter->num_rx_queues; i++)
3151 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
3152
3153 /* disable drop enable for 82598 parts */
3154 if (hw->mac.type == ixgbe_mac_82598EB)
3155 rxctrl |= IXGBE_RXCTRL_DMBYPS;
3156
3157 /* enable all receives */
3158 rxctrl |= IXGBE_RXCTRL_RXEN;
3159 hw->mac.ops.enable_rx_dma(hw, rxctrl);
3160 }
3161
3162 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
3163 {
3164 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3165 struct ixgbe_hw *hw = &adapter->hw;
3166 int pool_ndx = adapter->num_vfs;
3167
3168 /* add VID to filter table */
3169 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, true);
3170 set_bit(vid, adapter->active_vlans);
3171 }
3172
3173 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
3174 {
3175 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3176 struct ixgbe_hw *hw = &adapter->hw;
3177 int pool_ndx = adapter->num_vfs;
3178
3179 /* remove VID from filter table */
3180 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, false);
3181 clear_bit(vid, adapter->active_vlans);
3182 }
3183
3184 /**
3185 * ixgbe_vlan_filter_disable - helper to disable hw vlan filtering
3186 * @adapter: driver data
3187 */
3188 static void ixgbe_vlan_filter_disable(struct ixgbe_adapter *adapter)
3189 {
3190 struct ixgbe_hw *hw = &adapter->hw;
3191 u32 vlnctrl;
3192
3193 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3194 vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
3195 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3196 }
3197
3198 /**
3199 * ixgbe_vlan_filter_enable - helper to enable hw vlan filtering
3200 * @adapter: driver data
3201 */
3202 static void ixgbe_vlan_filter_enable(struct ixgbe_adapter *adapter)
3203 {
3204 struct ixgbe_hw *hw = &adapter->hw;
3205 u32 vlnctrl;
3206
3207 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3208 vlnctrl |= IXGBE_VLNCTRL_VFE;
3209 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
3210 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3211 }
3212
3213 /**
3214 * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping
3215 * @adapter: driver data
3216 */
3217 static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
3218 {
3219 struct ixgbe_hw *hw = &adapter->hw;
3220 u32 vlnctrl;
3221 int i, j;
3222
3223 switch (hw->mac.type) {
3224 case ixgbe_mac_82598EB:
3225 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3226 vlnctrl &= ~IXGBE_VLNCTRL_VME;
3227 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3228 break;
3229 case ixgbe_mac_82599EB:
3230 for (i = 0; i < adapter->num_rx_queues; i++) {
3231 j = adapter->rx_ring[i]->reg_idx;
3232 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3233 vlnctrl &= ~IXGBE_RXDCTL_VME;
3234 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3235 }
3236 break;
3237 default:
3238 break;
3239 }
3240 }
3241
3242 /**
3243 * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping
3244 * @adapter: driver data
3245 */
3246 static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
3247 {
3248 struct ixgbe_hw *hw = &adapter->hw;
3249 u32 vlnctrl;
3250 int i, j;
3251
3252 switch (hw->mac.type) {
3253 case ixgbe_mac_82598EB:
3254 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3255 vlnctrl |= IXGBE_VLNCTRL_VME;
3256 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3257 break;
3258 case ixgbe_mac_82599EB:
3259 for (i = 0; i < adapter->num_rx_queues; i++) {
3260 j = adapter->rx_ring[i]->reg_idx;
3261 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3262 vlnctrl |= IXGBE_RXDCTL_VME;
3263 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3264 }
3265 break;
3266 default:
3267 break;
3268 }
3269 }
3270
3271 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
3272 {
3273 u16 vid;
3274
3275 ixgbe_vlan_rx_add_vid(adapter->netdev, 0);
3276
3277 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
3278 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
3279 }
3280
3281 /**
3282 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
3283 * @netdev: network interface device structure
3284 *
3285 * Writes unicast address list to the RAR table.
3286 * Returns: -ENOMEM on failure/insufficient address space
3287 * 0 on no addresses written
3288 * X on writing X addresses to the RAR table
3289 **/
3290 static int ixgbe_write_uc_addr_list(struct net_device *netdev)
3291 {
3292 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3293 struct ixgbe_hw *hw = &adapter->hw;
3294 unsigned int vfn = adapter->num_vfs;
3295 unsigned int rar_entries = hw->mac.num_rar_entries - (vfn + 1);
3296 int count = 0;
3297
3298 /* return ENOMEM indicating insufficient memory for addresses */
3299 if (netdev_uc_count(netdev) > rar_entries)
3300 return -ENOMEM;
3301
3302 if (!netdev_uc_empty(netdev) && rar_entries) {
3303 struct netdev_hw_addr *ha;
3304 /* return error if we do not support writing to RAR table */
3305 if (!hw->mac.ops.set_rar)
3306 return -ENOMEM;
3307
3308 netdev_for_each_uc_addr(ha, netdev) {
3309 if (!rar_entries)
3310 break;
3311 hw->mac.ops.set_rar(hw, rar_entries--, ha->addr,
3312 vfn, IXGBE_RAH_AV);
3313 count++;
3314 }
3315 }
3316 /* write the addresses in reverse order to avoid write combining */
3317 for (; rar_entries > 0 ; rar_entries--)
3318 hw->mac.ops.clear_rar(hw, rar_entries);
3319
3320 return count;
3321 }
3322
3323 /**
3324 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
3325 * @netdev: network interface device structure
3326 *
3327 * The set_rx_method entry point is called whenever the unicast/multicast
3328 * address list or the network interface flags are updated. This routine is
3329 * responsible for configuring the hardware for proper unicast, multicast and
3330 * promiscuous mode.
3331 **/
3332 void ixgbe_set_rx_mode(struct net_device *netdev)
3333 {
3334 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3335 struct ixgbe_hw *hw = &adapter->hw;
3336 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
3337 int count;
3338
3339 /* Check for Promiscuous and All Multicast modes */
3340
3341 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3342
3343 /* set all bits that we expect to always be set */
3344 fctrl |= IXGBE_FCTRL_BAM;
3345 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
3346 fctrl |= IXGBE_FCTRL_PMCF;
3347
3348 /* clear the bits we are changing the status of */
3349 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3350
3351 if (netdev->flags & IFF_PROMISC) {
3352 hw->addr_ctrl.user_set_promisc = true;
3353 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3354 vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_MPE);
3355 /* don't hardware filter vlans in promisc mode */
3356 ixgbe_vlan_filter_disable(adapter);
3357 } else {
3358 if (netdev->flags & IFF_ALLMULTI) {
3359 fctrl |= IXGBE_FCTRL_MPE;
3360 vmolr |= IXGBE_VMOLR_MPE;
3361 } else {
3362 /*
3363 * Write addresses to the MTA, if the attempt fails
3364 * then we should just turn on promiscous mode so
3365 * that we can at least receive multicast traffic
3366 */
3367 hw->mac.ops.update_mc_addr_list(hw, netdev);
3368 vmolr |= IXGBE_VMOLR_ROMPE;
3369 }
3370 ixgbe_vlan_filter_enable(adapter);
3371 hw->addr_ctrl.user_set_promisc = false;
3372 /*
3373 * Write addresses to available RAR registers, if there is not
3374 * sufficient space to store all the addresses then enable
3375 * unicast promiscous mode
3376 */
3377 count = ixgbe_write_uc_addr_list(netdev);
3378 if (count < 0) {
3379 fctrl |= IXGBE_FCTRL_UPE;
3380 vmolr |= IXGBE_VMOLR_ROPE;
3381 }
3382 }
3383
3384 if (adapter->num_vfs) {
3385 ixgbe_restore_vf_multicasts(adapter);
3386 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(adapter->num_vfs)) &
3387 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
3388 IXGBE_VMOLR_ROPE);
3389 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(adapter->num_vfs), vmolr);
3390 }
3391
3392 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
3393
3394 if (netdev->features & NETIF_F_HW_VLAN_RX)
3395 ixgbe_vlan_strip_enable(adapter);
3396 else
3397 ixgbe_vlan_strip_disable(adapter);
3398 }
3399
3400 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
3401 {
3402 int q_idx;
3403 struct ixgbe_q_vector *q_vector;
3404 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3405
3406 /* legacy and MSI only use one vector */
3407 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3408 q_vectors = 1;
3409
3410 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3411 struct napi_struct *napi;
3412 q_vector = adapter->q_vector[q_idx];
3413 napi = &q_vector->napi;
3414 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3415 if (!q_vector->rxr_count || !q_vector->txr_count) {
3416 if (q_vector->txr_count == 1)
3417 napi->poll = &ixgbe_clean_txonly;
3418 else if (q_vector->rxr_count == 1)
3419 napi->poll = &ixgbe_clean_rxonly;
3420 }
3421 }
3422
3423 napi_enable(napi);
3424 }
3425 }
3426
3427 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
3428 {
3429 int q_idx;
3430 struct ixgbe_q_vector *q_vector;
3431 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3432
3433 /* legacy and MSI only use one vector */
3434 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3435 q_vectors = 1;
3436
3437 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3438 q_vector = adapter->q_vector[q_idx];
3439 napi_disable(&q_vector->napi);
3440 }
3441 }
3442
3443 #ifdef CONFIG_IXGBE_DCB
3444 /*
3445 * ixgbe_configure_dcb - Configure DCB hardware
3446 * @adapter: ixgbe adapter struct
3447 *
3448 * This is called by the driver on open to configure the DCB hardware.
3449 * This is also called by the gennetlink interface when reconfiguring
3450 * the DCB state.
3451 */
3452 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
3453 {
3454 struct ixgbe_hw *hw = &adapter->hw;
3455 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3456
3457 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
3458 if (hw->mac.type == ixgbe_mac_82598EB)
3459 netif_set_gso_max_size(adapter->netdev, 65536);
3460 return;
3461 }
3462
3463 if (hw->mac.type == ixgbe_mac_82598EB)
3464 netif_set_gso_max_size(adapter->netdev, 32768);
3465
3466 #ifdef CONFIG_FCOE
3467 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
3468 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
3469 #endif
3470
3471 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3472 DCB_TX_CONFIG);
3473 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3474 DCB_RX_CONFIG);
3475
3476 /* Enable VLAN tag insert/strip */
3477 adapter->netdev->features |= NETIF_F_HW_VLAN_RX;
3478
3479 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
3480
3481 /* reconfigure the hardware */
3482 ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
3483 }
3484
3485 #endif
3486 static void ixgbe_configure(struct ixgbe_adapter *adapter)
3487 {
3488 struct net_device *netdev = adapter->netdev;
3489 struct ixgbe_hw *hw = &adapter->hw;
3490 int i;
3491
3492 #ifdef CONFIG_IXGBE_DCB
3493 ixgbe_configure_dcb(adapter);
3494 #endif
3495
3496 ixgbe_set_rx_mode(netdev);
3497 ixgbe_restore_vlan(adapter);
3498
3499 #ifdef IXGBE_FCOE
3500 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
3501 ixgbe_configure_fcoe(adapter);
3502
3503 #endif /* IXGBE_FCOE */
3504 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3505 for (i = 0; i < adapter->num_tx_queues; i++)
3506 adapter->tx_ring[i]->atr_sample_rate =
3507 adapter->atr_sample_rate;
3508 ixgbe_init_fdir_signature_82599(hw, adapter->fdir_pballoc);
3509 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
3510 ixgbe_init_fdir_perfect_82599(hw, adapter->fdir_pballoc);
3511 }
3512 ixgbe_configure_virtualization(adapter);
3513
3514 ixgbe_configure_tx(adapter);
3515 ixgbe_configure_rx(adapter);
3516 }
3517
3518 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
3519 {
3520 switch (hw->phy.type) {
3521 case ixgbe_phy_sfp_avago:
3522 case ixgbe_phy_sfp_ftl:
3523 case ixgbe_phy_sfp_intel:
3524 case ixgbe_phy_sfp_unknown:
3525 case ixgbe_phy_sfp_passive_tyco:
3526 case ixgbe_phy_sfp_passive_unknown:
3527 case ixgbe_phy_sfp_active_unknown:
3528 case ixgbe_phy_sfp_ftl_active:
3529 return true;
3530 default:
3531 return false;
3532 }
3533 }
3534
3535 /**
3536 * ixgbe_sfp_link_config - set up SFP+ link
3537 * @adapter: pointer to private adapter struct
3538 **/
3539 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
3540 {
3541 struct ixgbe_hw *hw = &adapter->hw;
3542
3543 if (hw->phy.multispeed_fiber) {
3544 /*
3545 * In multispeed fiber setups, the device may not have
3546 * had a physical connection when the driver loaded.
3547 * If that's the case, the initial link configuration
3548 * couldn't get the MAC into 10G or 1G mode, so we'll
3549 * never have a link status change interrupt fire.
3550 * We need to try and force an autonegotiation
3551 * session, then bring up link.
3552 */
3553 hw->mac.ops.setup_sfp(hw);
3554 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
3555 schedule_work(&adapter->multispeed_fiber_task);
3556 } else {
3557 /*
3558 * Direct Attach Cu and non-multispeed fiber modules
3559 * still need to be configured properly prior to
3560 * attempting link.
3561 */
3562 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_MOD_TASK))
3563 schedule_work(&adapter->sfp_config_module_task);
3564 }
3565 }
3566
3567 /**
3568 * ixgbe_non_sfp_link_config - set up non-SFP+ link
3569 * @hw: pointer to private hardware struct
3570 *
3571 * Returns 0 on success, negative on failure
3572 **/
3573 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
3574 {
3575 u32 autoneg;
3576 bool negotiation, link_up = false;
3577 u32 ret = IXGBE_ERR_LINK_SETUP;
3578
3579 if (hw->mac.ops.check_link)
3580 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
3581
3582 if (ret)
3583 goto link_cfg_out;
3584
3585 if (hw->mac.ops.get_link_capabilities)
3586 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg,
3587 &negotiation);
3588 if (ret)
3589 goto link_cfg_out;
3590
3591 if (hw->mac.ops.setup_link)
3592 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
3593 link_cfg_out:
3594 return ret;
3595 }
3596
3597 static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
3598 {
3599 struct ixgbe_hw *hw = &adapter->hw;
3600 u32 gpie = 0;
3601
3602 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3603 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
3604 IXGBE_GPIE_OCD;
3605 gpie |= IXGBE_GPIE_EIAME;
3606 /*
3607 * use EIAM to auto-mask when MSI-X interrupt is asserted
3608 * this saves a register write for every interrupt
3609 */
3610 switch (hw->mac.type) {
3611 case ixgbe_mac_82598EB:
3612 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3613 break;
3614 default:
3615 case ixgbe_mac_82599EB:
3616 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
3617 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
3618 break;
3619 }
3620 } else {
3621 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
3622 * specifically only auto mask tx and rx interrupts */
3623 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3624 }
3625
3626 /* XXX: to interrupt immediately for EICS writes, enable this */
3627 /* gpie |= IXGBE_GPIE_EIMEN; */
3628
3629 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3630 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
3631 gpie |= IXGBE_GPIE_VTMODE_64;
3632 }
3633
3634 /* Enable fan failure interrupt */
3635 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
3636 gpie |= IXGBE_SDP1_GPIEN;
3637
3638 if (hw->mac.type == ixgbe_mac_82599EB)
3639 gpie |= IXGBE_SDP1_GPIEN;
3640 gpie |= IXGBE_SDP2_GPIEN;
3641
3642 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3643 }
3644
3645 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
3646 {
3647 struct ixgbe_hw *hw = &adapter->hw;
3648 int err;
3649 u32 ctrl_ext;
3650
3651 ixgbe_get_hw_control(adapter);
3652 ixgbe_setup_gpie(adapter);
3653
3654 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3655 ixgbe_configure_msix(adapter);
3656 else
3657 ixgbe_configure_msi_and_legacy(adapter);
3658
3659 /* enable the optics */
3660 if (hw->phy.multispeed_fiber)
3661 hw->mac.ops.enable_tx_laser(hw);
3662
3663 clear_bit(__IXGBE_DOWN, &adapter->state);
3664 ixgbe_napi_enable_all(adapter);
3665
3666 if (ixgbe_is_sfp(hw)) {
3667 ixgbe_sfp_link_config(adapter);
3668 } else {
3669 err = ixgbe_non_sfp_link_config(hw);
3670 if (err)
3671 e_err(probe, "link_config FAILED %d\n", err);
3672 }
3673
3674 /* clear any pending interrupts, may auto mask */
3675 IXGBE_READ_REG(hw, IXGBE_EICR);
3676 ixgbe_irq_enable(adapter, true, true);
3677
3678 /*
3679 * If this adapter has a fan, check to see if we had a failure
3680 * before we enabled the interrupt.
3681 */
3682 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
3683 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
3684 if (esdp & IXGBE_ESDP_SDP1)
3685 e_crit(drv, "Fan has stopped, replace the adapter\n");
3686 }
3687
3688 /*
3689 * For hot-pluggable SFP+ devices, a new SFP+ module may have
3690 * arrived before interrupts were enabled but after probe. Such
3691 * devices wouldn't have their type identified yet. We need to
3692 * kick off the SFP+ module setup first, then try to bring up link.
3693 * If we're not hot-pluggable SFP+, we just need to configure link
3694 * and bring it up.
3695 */
3696 if (hw->phy.type == ixgbe_phy_unknown)
3697 schedule_work(&adapter->sfp_config_module_task);
3698
3699 /* enable transmits */
3700 netif_tx_start_all_queues(adapter->netdev);
3701
3702 /* bring the link up in the watchdog, this could race with our first
3703 * link up interrupt but shouldn't be a problem */
3704 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
3705 adapter->link_check_timeout = jiffies;
3706 mod_timer(&adapter->watchdog_timer, jiffies);
3707
3708 /* Set PF Reset Done bit so PF/VF Mail Ops can work */
3709 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
3710 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
3711 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
3712
3713 return 0;
3714 }
3715
3716 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
3717 {
3718 WARN_ON(in_interrupt());
3719 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
3720 msleep(1);
3721 ixgbe_down(adapter);
3722 /*
3723 * If SR-IOV enabled then wait a bit before bringing the adapter
3724 * back up to give the VFs time to respond to the reset. The
3725 * two second wait is based upon the watchdog timer cycle in
3726 * the VF driver.
3727 */
3728 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3729 msleep(2000);
3730 ixgbe_up(adapter);
3731 clear_bit(__IXGBE_RESETTING, &adapter->state);
3732 }
3733
3734 int ixgbe_up(struct ixgbe_adapter *adapter)
3735 {
3736 /* hardware has been reset, we need to reload some things */
3737 ixgbe_configure(adapter);
3738
3739 return ixgbe_up_complete(adapter);
3740 }
3741
3742 void ixgbe_reset(struct ixgbe_adapter *adapter)
3743 {
3744 struct ixgbe_hw *hw = &adapter->hw;
3745 int err;
3746
3747 err = hw->mac.ops.init_hw(hw);
3748 switch (err) {
3749 case 0:
3750 case IXGBE_ERR_SFP_NOT_PRESENT:
3751 break;
3752 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
3753 e_dev_err("master disable timed out\n");
3754 break;
3755 case IXGBE_ERR_EEPROM_VERSION:
3756 /* We are running on a pre-production device, log a warning */
3757 e_dev_warn("This device is a pre-production adapter/LOM. "
3758 "Please be aware there may be issuesassociated with "
3759 "your hardware. If you are experiencing problems "
3760 "please contact your Intel or hardware "
3761 "representative who provided you with this "
3762 "hardware.\n");
3763 break;
3764 default:
3765 e_dev_err("Hardware Error: %d\n", err);
3766 }
3767
3768 /* reprogram the RAR[0] in case user changed it. */
3769 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
3770 IXGBE_RAH_AV);
3771 }
3772
3773 /**
3774 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
3775 * @rx_ring: ring to free buffers from
3776 **/
3777 static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring)
3778 {
3779 struct device *dev = rx_ring->dev;
3780 unsigned long size;
3781 u16 i;
3782
3783 /* ring already cleared, nothing to do */
3784 if (!rx_ring->rx_buffer_info)
3785 return;
3786
3787 /* Free all the Rx ring sk_buffs */
3788 for (i = 0; i < rx_ring->count; i++) {
3789 struct ixgbe_rx_buffer *rx_buffer_info;
3790
3791 rx_buffer_info = &rx_ring->rx_buffer_info[i];
3792 if (rx_buffer_info->dma) {
3793 dma_unmap_single(rx_ring->dev, rx_buffer_info->dma,
3794 rx_ring->rx_buf_len,
3795 DMA_FROM_DEVICE);
3796 rx_buffer_info->dma = 0;
3797 }
3798 if (rx_buffer_info->skb) {
3799 struct sk_buff *skb = rx_buffer_info->skb;
3800 rx_buffer_info->skb = NULL;
3801 do {
3802 struct sk_buff *this = skb;
3803 if (IXGBE_RSC_CB(this)->delay_unmap) {
3804 dma_unmap_single(dev,
3805 IXGBE_RSC_CB(this)->dma,
3806 rx_ring->rx_buf_len,
3807 DMA_FROM_DEVICE);
3808 IXGBE_RSC_CB(this)->dma = 0;
3809 IXGBE_RSC_CB(skb)->delay_unmap = false;
3810 }
3811 skb = skb->prev;
3812 dev_kfree_skb(this);
3813 } while (skb);
3814 }
3815 if (!rx_buffer_info->page)
3816 continue;
3817 if (rx_buffer_info->page_dma) {
3818 dma_unmap_page(dev, rx_buffer_info->page_dma,
3819 PAGE_SIZE / 2, DMA_FROM_DEVICE);
3820 rx_buffer_info->page_dma = 0;
3821 }
3822 put_page(rx_buffer_info->page);
3823 rx_buffer_info->page = NULL;
3824 rx_buffer_info->page_offset = 0;
3825 }
3826
3827 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
3828 memset(rx_ring->rx_buffer_info, 0, size);
3829
3830 /* Zero out the descriptor ring */
3831 memset(rx_ring->desc, 0, rx_ring->size);
3832
3833 rx_ring->next_to_clean = 0;
3834 rx_ring->next_to_use = 0;
3835 }
3836
3837 /**
3838 * ixgbe_clean_tx_ring - Free Tx Buffers
3839 * @tx_ring: ring to be cleaned
3840 **/
3841 static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
3842 {
3843 struct ixgbe_tx_buffer *tx_buffer_info;
3844 unsigned long size;
3845 u16 i;
3846
3847 /* ring already cleared, nothing to do */
3848 if (!tx_ring->tx_buffer_info)
3849 return;
3850
3851 /* Free all the Tx ring sk_buffs */
3852 for (i = 0; i < tx_ring->count; i++) {
3853 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3854 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
3855 }
3856
3857 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
3858 memset(tx_ring->tx_buffer_info, 0, size);
3859
3860 /* Zero out the descriptor ring */
3861 memset(tx_ring->desc, 0, tx_ring->size);
3862
3863 tx_ring->next_to_use = 0;
3864 tx_ring->next_to_clean = 0;
3865 }
3866
3867 /**
3868 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
3869 * @adapter: board private structure
3870 **/
3871 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
3872 {
3873 int i;
3874
3875 for (i = 0; i < adapter->num_rx_queues; i++)
3876 ixgbe_clean_rx_ring(adapter->rx_ring[i]);
3877 }
3878
3879 /**
3880 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
3881 * @adapter: board private structure
3882 **/
3883 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
3884 {
3885 int i;
3886
3887 for (i = 0; i < adapter->num_tx_queues; i++)
3888 ixgbe_clean_tx_ring(adapter->tx_ring[i]);
3889 }
3890
3891 void ixgbe_down(struct ixgbe_adapter *adapter)
3892 {
3893 struct net_device *netdev = adapter->netdev;
3894 struct ixgbe_hw *hw = &adapter->hw;
3895 u32 rxctrl;
3896 u32 txdctl;
3897 int i, j;
3898 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3899
3900 /* signal that we are down to the interrupt handler */
3901 set_bit(__IXGBE_DOWN, &adapter->state);
3902
3903 /* disable receive for all VFs and wait one second */
3904 if (adapter->num_vfs) {
3905 /* ping all the active vfs to let them know we are going down */
3906 ixgbe_ping_all_vfs(adapter);
3907
3908 /* Disable all VFTE/VFRE TX/RX */
3909 ixgbe_disable_tx_rx(adapter);
3910
3911 /* Mark all the VFs as inactive */
3912 for (i = 0 ; i < adapter->num_vfs; i++)
3913 adapter->vfinfo[i].clear_to_send = 0;
3914 }
3915
3916 /* disable receives */
3917 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3918 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3919
3920 IXGBE_WRITE_FLUSH(hw);
3921 msleep(10);
3922
3923 netif_tx_stop_all_queues(netdev);
3924
3925 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3926 del_timer_sync(&adapter->sfp_timer);
3927 del_timer_sync(&adapter->watchdog_timer);
3928 cancel_work_sync(&adapter->watchdog_task);
3929
3930 netif_carrier_off(netdev);
3931 netif_tx_disable(netdev);
3932
3933 ixgbe_irq_disable(adapter);
3934
3935 ixgbe_napi_disable_all(adapter);
3936
3937 /* Cleanup the affinity_hint CPU mask memory and callback */
3938 for (i = 0; i < num_q_vectors; i++) {
3939 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
3940 /* clear the affinity_mask in the IRQ descriptor */
3941 irq_set_affinity_hint(adapter->msix_entries[i]. vector, NULL);
3942 /* release the CPU mask memory */
3943 free_cpumask_var(q_vector->affinity_mask);
3944 }
3945
3946 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3947 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
3948 cancel_work_sync(&adapter->fdir_reinit_task);
3949
3950 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
3951 cancel_work_sync(&adapter->check_overtemp_task);
3952
3953 /* disable transmits in the hardware now that interrupts are off */
3954 for (i = 0; i < adapter->num_tx_queues; i++) {
3955 j = adapter->tx_ring[i]->reg_idx;
3956 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3957 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
3958 (txdctl & ~IXGBE_TXDCTL_ENABLE));
3959 }
3960 /* Disable the Tx DMA engine on 82599 */
3961 switch (hw->mac.type) {
3962 case ixgbe_mac_82599EB:
3963 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
3964 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
3965 ~IXGBE_DMATXCTL_TE));
3966 break;
3967 default:
3968 break;
3969 }
3970
3971 /* power down the optics */
3972 if (hw->phy.multispeed_fiber)
3973 hw->mac.ops.disable_tx_laser(hw);
3974
3975 /* clear n-tuple filters that are cached */
3976 ethtool_ntuple_flush(netdev);
3977
3978 if (!pci_channel_offline(adapter->pdev))
3979 ixgbe_reset(adapter);
3980 ixgbe_clean_all_tx_rings(adapter);
3981 ixgbe_clean_all_rx_rings(adapter);
3982
3983 #ifdef CONFIG_IXGBE_DCA
3984 /* since we reset the hardware DCA settings were cleared */
3985 ixgbe_setup_dca(adapter);
3986 #endif
3987 }
3988
3989 /**
3990 * ixgbe_poll - NAPI Rx polling callback
3991 * @napi: structure for representing this polling device
3992 * @budget: how many packets driver is allowed to clean
3993 *
3994 * This function is used for legacy and MSI, NAPI mode
3995 **/
3996 static int ixgbe_poll(struct napi_struct *napi, int budget)
3997 {
3998 struct ixgbe_q_vector *q_vector =
3999 container_of(napi, struct ixgbe_q_vector, napi);
4000 struct ixgbe_adapter *adapter = q_vector->adapter;
4001 int tx_clean_complete, work_done = 0;
4002
4003 #ifdef CONFIG_IXGBE_DCA
4004 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
4005 ixgbe_update_dca(q_vector);
4006 #endif
4007
4008 tx_clean_complete = ixgbe_clean_tx_irq(q_vector, adapter->tx_ring[0]);
4009 ixgbe_clean_rx_irq(q_vector, adapter->rx_ring[0], &work_done, budget);
4010
4011 if (!tx_clean_complete)
4012 work_done = budget;
4013
4014 /* If budget not fully consumed, exit the polling mode */
4015 if (work_done < budget) {
4016 napi_complete(napi);
4017 if (adapter->rx_itr_setting & 1)
4018 ixgbe_set_itr(adapter);
4019 if (!test_bit(__IXGBE_DOWN, &adapter->state))
4020 ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
4021 }
4022 return work_done;
4023 }
4024
4025 /**
4026 * ixgbe_tx_timeout - Respond to a Tx Hang
4027 * @netdev: network interface device structure
4028 **/
4029 static void ixgbe_tx_timeout(struct net_device *netdev)
4030 {
4031 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4032
4033 /* Do the reset outside of interrupt context */
4034 schedule_work(&adapter->reset_task);
4035 }
4036
4037 static void ixgbe_reset_task(struct work_struct *work)
4038 {
4039 struct ixgbe_adapter *adapter;
4040 adapter = container_of(work, struct ixgbe_adapter, reset_task);
4041
4042 /* If we're already down or resetting, just bail */
4043 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
4044 test_bit(__IXGBE_RESETTING, &adapter->state))
4045 return;
4046
4047 adapter->tx_timeout_count++;
4048
4049 ixgbe_dump(adapter);
4050 netdev_err(adapter->netdev, "Reset adapter\n");
4051 ixgbe_reinit_locked(adapter);
4052 }
4053
4054 #ifdef CONFIG_IXGBE_DCB
4055 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
4056 {
4057 bool ret = false;
4058 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_DCB];
4059
4060 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
4061 return ret;
4062
4063 f->mask = 0x7 << 3;
4064 adapter->num_rx_queues = f->indices;
4065 adapter->num_tx_queues = f->indices;
4066 ret = true;
4067
4068 return ret;
4069 }
4070 #endif
4071
4072 /**
4073 * ixgbe_set_rss_queues: Allocate queues for RSS
4074 * @adapter: board private structure to initialize
4075 *
4076 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
4077 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
4078 *
4079 **/
4080 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
4081 {
4082 bool ret = false;
4083 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
4084
4085 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4086 f->mask = 0xF;
4087 adapter->num_rx_queues = f->indices;
4088 adapter->num_tx_queues = f->indices;
4089 ret = true;
4090 } else {
4091 ret = false;
4092 }
4093
4094 return ret;
4095 }
4096
4097 /**
4098 * ixgbe_set_fdir_queues: Allocate queues for Flow Director
4099 * @adapter: board private structure to initialize
4100 *
4101 * Flow Director is an advanced Rx filter, attempting to get Rx flows back
4102 * to the original CPU that initiated the Tx session. This runs in addition
4103 * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
4104 * Rx load across CPUs using RSS.
4105 *
4106 **/
4107 static inline bool ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
4108 {
4109 bool ret = false;
4110 struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
4111
4112 f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
4113 f_fdir->mask = 0;
4114
4115 /* Flow Director must have RSS enabled */
4116 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
4117 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
4118 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)))) {
4119 adapter->num_tx_queues = f_fdir->indices;
4120 adapter->num_rx_queues = f_fdir->indices;
4121 ret = true;
4122 } else {
4123 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4124 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4125 }
4126 return ret;
4127 }
4128
4129 #ifdef IXGBE_FCOE
4130 /**
4131 * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
4132 * @adapter: board private structure to initialize
4133 *
4134 * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
4135 * The ring feature mask is not used as a mask for FCoE, as it can take any 8
4136 * rx queues out of the max number of rx queues, instead, it is used as the
4137 * index of the first rx queue used by FCoE.
4138 *
4139 **/
4140 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
4141 {
4142 bool ret = false;
4143 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4144
4145 f->indices = min((int)num_online_cpus(), f->indices);
4146 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
4147 adapter->num_rx_queues = 1;
4148 adapter->num_tx_queues = 1;
4149 #ifdef CONFIG_IXGBE_DCB
4150 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4151 e_info(probe, "FCoE enabled with DCB\n");
4152 ixgbe_set_dcb_queues(adapter);
4153 }
4154 #endif
4155 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4156 e_info(probe, "FCoE enabled with RSS\n");
4157 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4158 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
4159 ixgbe_set_fdir_queues(adapter);
4160 else
4161 ixgbe_set_rss_queues(adapter);
4162 }
4163 /* adding FCoE rx rings to the end */
4164 f->mask = adapter->num_rx_queues;
4165 adapter->num_rx_queues += f->indices;
4166 adapter->num_tx_queues += f->indices;
4167
4168 ret = true;
4169 }
4170
4171 return ret;
4172 }
4173
4174 #endif /* IXGBE_FCOE */
4175 /**
4176 * ixgbe_set_sriov_queues: Allocate queues for IOV use
4177 * @adapter: board private structure to initialize
4178 *
4179 * IOV doesn't actually use anything, so just NAK the
4180 * request for now and let the other queue routines
4181 * figure out what to do.
4182 */
4183 static inline bool ixgbe_set_sriov_queues(struct ixgbe_adapter *adapter)
4184 {
4185 return false;
4186 }
4187
4188 /*
4189 * ixgbe_set_num_queues: Allocate queues for device, feature dependant
4190 * @adapter: board private structure to initialize
4191 *
4192 * This is the top level queue allocation routine. The order here is very
4193 * important, starting with the "most" number of features turned on at once,
4194 * and ending with the smallest set of features. This way large combinations
4195 * can be allocated if they're turned on, and smaller combinations are the
4196 * fallthrough conditions.
4197 *
4198 **/
4199 static int ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
4200 {
4201 /* Start with base case */
4202 adapter->num_rx_queues = 1;
4203 adapter->num_tx_queues = 1;
4204 adapter->num_rx_pools = adapter->num_rx_queues;
4205 adapter->num_rx_queues_per_pool = 1;
4206
4207 if (ixgbe_set_sriov_queues(adapter))
4208 goto done;
4209
4210 #ifdef IXGBE_FCOE
4211 if (ixgbe_set_fcoe_queues(adapter))
4212 goto done;
4213
4214 #endif /* IXGBE_FCOE */
4215 #ifdef CONFIG_IXGBE_DCB
4216 if (ixgbe_set_dcb_queues(adapter))
4217 goto done;
4218
4219 #endif
4220 if (ixgbe_set_fdir_queues(adapter))
4221 goto done;
4222
4223 if (ixgbe_set_rss_queues(adapter))
4224 goto done;
4225
4226 /* fallback to base case */
4227 adapter->num_rx_queues = 1;
4228 adapter->num_tx_queues = 1;
4229
4230 done:
4231 /* Notify the stack of the (possibly) reduced queue counts. */
4232 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
4233 return netif_set_real_num_rx_queues(adapter->netdev,
4234 adapter->num_rx_queues);
4235 }
4236
4237 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
4238 int vectors)
4239 {
4240 int err, vector_threshold;
4241
4242 /* We'll want at least 3 (vector_threshold):
4243 * 1) TxQ[0] Cleanup
4244 * 2) RxQ[0] Cleanup
4245 * 3) Other (Link Status Change, etc.)
4246 * 4) TCP Timer (optional)
4247 */
4248 vector_threshold = MIN_MSIX_COUNT;
4249
4250 /* The more we get, the more we will assign to Tx/Rx Cleanup
4251 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
4252 * Right now, we simply care about how many we'll get; we'll
4253 * set them up later while requesting irq's.
4254 */
4255 while (vectors >= vector_threshold) {
4256 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
4257 vectors);
4258 if (!err) /* Success in acquiring all requested vectors. */
4259 break;
4260 else if (err < 0)
4261 vectors = 0; /* Nasty failure, quit now */
4262 else /* err == number of vectors we should try again with */
4263 vectors = err;
4264 }
4265
4266 if (vectors < vector_threshold) {
4267 /* Can't allocate enough MSI-X interrupts? Oh well.
4268 * This just means we'll go with either a single MSI
4269 * vector or fall back to legacy interrupts.
4270 */
4271 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4272 "Unable to allocate MSI-X interrupts\n");
4273 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4274 kfree(adapter->msix_entries);
4275 adapter->msix_entries = NULL;
4276 } else {
4277 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
4278 /*
4279 * Adjust for only the vectors we'll use, which is minimum
4280 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
4281 * vectors we were allocated.
4282 */
4283 adapter->num_msix_vectors = min(vectors,
4284 adapter->max_msix_q_vectors + NON_Q_VECTORS);
4285 }
4286 }
4287
4288 /**
4289 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
4290 * @adapter: board private structure to initialize
4291 *
4292 * Cache the descriptor ring offsets for RSS to the assigned rings.
4293 *
4294 **/
4295 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
4296 {
4297 int i;
4298 bool ret = false;
4299
4300 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4301 for (i = 0; i < adapter->num_rx_queues; i++)
4302 adapter->rx_ring[i]->reg_idx = i;
4303 for (i = 0; i < adapter->num_tx_queues; i++)
4304 adapter->tx_ring[i]->reg_idx = i;
4305 ret = true;
4306 } else {
4307 ret = false;
4308 }
4309
4310 return ret;
4311 }
4312
4313 #ifdef CONFIG_IXGBE_DCB
4314 /**
4315 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
4316 * @adapter: board private structure to initialize
4317 *
4318 * Cache the descriptor ring offsets for DCB to the assigned rings.
4319 *
4320 **/
4321 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
4322 {
4323 int i;
4324 bool ret = false;
4325 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
4326
4327 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
4328 return false;
4329
4330 /* the number of queues is assumed to be symmetric */
4331 switch (adapter->hw.mac.type) {
4332 case ixgbe_mac_82598EB:
4333 for (i = 0; i < dcb_i; i++) {
4334 adapter->rx_ring[i]->reg_idx = i << 3;
4335 adapter->tx_ring[i]->reg_idx = i << 2;
4336 }
4337 ret = true;
4338 break;
4339 case ixgbe_mac_82599EB:
4340 if (dcb_i == 8) {
4341 /*
4342 * Tx TC0 starts at: descriptor queue 0
4343 * Tx TC1 starts at: descriptor queue 32
4344 * Tx TC2 starts at: descriptor queue 64
4345 * Tx TC3 starts at: descriptor queue 80
4346 * Tx TC4 starts at: descriptor queue 96
4347 * Tx TC5 starts at: descriptor queue 104
4348 * Tx TC6 starts at: descriptor queue 112
4349 * Tx TC7 starts at: descriptor queue 120
4350 *
4351 * Rx TC0-TC7 are offset by 16 queues each
4352 */
4353 for (i = 0; i < 3; i++) {
4354 adapter->tx_ring[i]->reg_idx = i << 5;
4355 adapter->rx_ring[i]->reg_idx = i << 4;
4356 }
4357 for ( ; i < 5; i++) {
4358 adapter->tx_ring[i]->reg_idx = ((i + 2) << 4);
4359 adapter->rx_ring[i]->reg_idx = i << 4;
4360 }
4361 for ( ; i < dcb_i; i++) {
4362 adapter->tx_ring[i]->reg_idx = ((i + 8) << 3);
4363 adapter->rx_ring[i]->reg_idx = i << 4;
4364 }
4365 ret = true;
4366 } else if (dcb_i == 4) {
4367 /*
4368 * Tx TC0 starts at: descriptor queue 0
4369 * Tx TC1 starts at: descriptor queue 64
4370 * Tx TC2 starts at: descriptor queue 96
4371 * Tx TC3 starts at: descriptor queue 112
4372 *
4373 * Rx TC0-TC3 are offset by 32 queues each
4374 */
4375 adapter->tx_ring[0]->reg_idx = 0;
4376 adapter->tx_ring[1]->reg_idx = 64;
4377 adapter->tx_ring[2]->reg_idx = 96;
4378 adapter->tx_ring[3]->reg_idx = 112;
4379 for (i = 0 ; i < dcb_i; i++)
4380 adapter->rx_ring[i]->reg_idx = i << 5;
4381 ret = true;
4382 }
4383 break;
4384 default:
4385 break;
4386 }
4387 return ret;
4388 }
4389 #endif
4390
4391 /**
4392 * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
4393 * @adapter: board private structure to initialize
4394 *
4395 * Cache the descriptor ring offsets for Flow Director to the assigned rings.
4396 *
4397 **/
4398 static inline bool ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
4399 {
4400 int i;
4401 bool ret = false;
4402
4403 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
4404 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4405 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))) {
4406 for (i = 0; i < adapter->num_rx_queues; i++)
4407 adapter->rx_ring[i]->reg_idx = i;
4408 for (i = 0; i < adapter->num_tx_queues; i++)
4409 adapter->tx_ring[i]->reg_idx = i;
4410 ret = true;
4411 }
4412
4413 return ret;
4414 }
4415
4416 #ifdef IXGBE_FCOE
4417 /**
4418 * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
4419 * @adapter: board private structure to initialize
4420 *
4421 * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
4422 *
4423 */
4424 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
4425 {
4426 int i, fcoe_rx_i = 0, fcoe_tx_i = 0;
4427 bool ret = false;
4428 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4429
4430 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
4431 #ifdef CONFIG_IXGBE_DCB
4432 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4433 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
4434
4435 ixgbe_cache_ring_dcb(adapter);
4436 /* find out queues in TC for FCoE */
4437 fcoe_rx_i = adapter->rx_ring[fcoe->tc]->reg_idx + 1;
4438 fcoe_tx_i = adapter->tx_ring[fcoe->tc]->reg_idx + 1;
4439 /*
4440 * In 82599, the number of Tx queues for each traffic
4441 * class for both 8-TC and 4-TC modes are:
4442 * TCs : TC0 TC1 TC2 TC3 TC4 TC5 TC6 TC7
4443 * 8 TCs: 32 32 16 16 8 8 8 8
4444 * 4 TCs: 64 64 32 32
4445 * We have max 8 queues for FCoE, where 8 the is
4446 * FCoE redirection table size. If TC for FCoE is
4447 * less than or equal to TC3, we have enough queues
4448 * to add max of 8 queues for FCoE, so we start FCoE
4449 * tx descriptor from the next one, i.e., reg_idx + 1.
4450 * If TC for FCoE is above TC3, implying 8 TC mode,
4451 * and we need 8 for FCoE, we have to take all queues
4452 * in that traffic class for FCoE.
4453 */
4454 if ((f->indices == IXGBE_FCRETA_SIZE) && (fcoe->tc > 3))
4455 fcoe_tx_i--;
4456 }
4457 #endif /* CONFIG_IXGBE_DCB */
4458 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4459 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4460 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
4461 ixgbe_cache_ring_fdir(adapter);
4462 else
4463 ixgbe_cache_ring_rss(adapter);
4464
4465 fcoe_rx_i = f->mask;
4466 fcoe_tx_i = f->mask;
4467 }
4468 for (i = 0; i < f->indices; i++, fcoe_rx_i++, fcoe_tx_i++) {
4469 adapter->rx_ring[f->mask + i]->reg_idx = fcoe_rx_i;
4470 adapter->tx_ring[f->mask + i]->reg_idx = fcoe_tx_i;
4471 }
4472 ret = true;
4473 }
4474 return ret;
4475 }
4476
4477 #endif /* IXGBE_FCOE */
4478 /**
4479 * ixgbe_cache_ring_sriov - Descriptor ring to register mapping for sriov
4480 * @adapter: board private structure to initialize
4481 *
4482 * SR-IOV doesn't use any descriptor rings but changes the default if
4483 * no other mapping is used.
4484 *
4485 */
4486 static inline bool ixgbe_cache_ring_sriov(struct ixgbe_adapter *adapter)
4487 {
4488 adapter->rx_ring[0]->reg_idx = adapter->num_vfs * 2;
4489 adapter->tx_ring[0]->reg_idx = adapter->num_vfs * 2;
4490 if (adapter->num_vfs)
4491 return true;
4492 else
4493 return false;
4494 }
4495
4496 /**
4497 * ixgbe_cache_ring_register - Descriptor ring to register mapping
4498 * @adapter: board private structure to initialize
4499 *
4500 * Once we know the feature-set enabled for the device, we'll cache
4501 * the register offset the descriptor ring is assigned to.
4502 *
4503 * Note, the order the various feature calls is important. It must start with
4504 * the "most" features enabled at the same time, then trickle down to the
4505 * least amount of features turned on at once.
4506 **/
4507 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
4508 {
4509 /* start with default case */
4510 adapter->rx_ring[0]->reg_idx = 0;
4511 adapter->tx_ring[0]->reg_idx = 0;
4512
4513 if (ixgbe_cache_ring_sriov(adapter))
4514 return;
4515
4516 #ifdef IXGBE_FCOE
4517 if (ixgbe_cache_ring_fcoe(adapter))
4518 return;
4519
4520 #endif /* IXGBE_FCOE */
4521 #ifdef CONFIG_IXGBE_DCB
4522 if (ixgbe_cache_ring_dcb(adapter))
4523 return;
4524
4525 #endif
4526 if (ixgbe_cache_ring_fdir(adapter))
4527 return;
4528
4529 if (ixgbe_cache_ring_rss(adapter))
4530 return;
4531 }
4532
4533 /**
4534 * ixgbe_alloc_queues - Allocate memory for all rings
4535 * @adapter: board private structure to initialize
4536 *
4537 * We allocate one ring per queue at run-time since we don't know the
4538 * number of queues at compile-time. The polling_netdev array is
4539 * intended for Multiqueue, but should work fine with a single queue.
4540 **/
4541 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
4542 {
4543 int i;
4544 int rx_count;
4545 int orig_node = adapter->node;
4546
4547 for (i = 0; i < adapter->num_tx_queues; i++) {
4548 struct ixgbe_ring *ring = adapter->tx_ring[i];
4549 if (orig_node == -1) {
4550 int cur_node = next_online_node(adapter->node);
4551 if (cur_node == MAX_NUMNODES)
4552 cur_node = first_online_node;
4553 adapter->node = cur_node;
4554 }
4555 ring = kzalloc_node(sizeof(struct ixgbe_ring), GFP_KERNEL,
4556 adapter->node);
4557 if (!ring)
4558 ring = kzalloc(sizeof(struct ixgbe_ring), GFP_KERNEL);
4559 if (!ring)
4560 goto err_tx_ring_allocation;
4561 ring->count = adapter->tx_ring_count;
4562 ring->queue_index = i;
4563 ring->dev = &adapter->pdev->dev;
4564 ring->netdev = adapter->netdev;
4565 ring->numa_node = adapter->node;
4566
4567 adapter->tx_ring[i] = ring;
4568 }
4569
4570 /* Restore the adapter's original node */
4571 adapter->node = orig_node;
4572
4573 rx_count = adapter->rx_ring_count;
4574 for (i = 0; i < adapter->num_rx_queues; i++) {
4575 struct ixgbe_ring *ring = adapter->rx_ring[i];
4576 if (orig_node == -1) {
4577 int cur_node = next_online_node(adapter->node);
4578 if (cur_node == MAX_NUMNODES)
4579 cur_node = first_online_node;
4580 adapter->node = cur_node;
4581 }
4582 ring = kzalloc_node(sizeof(struct ixgbe_ring), GFP_KERNEL,
4583 adapter->node);
4584 if (!ring)
4585 ring = kzalloc(sizeof(struct ixgbe_ring), GFP_KERNEL);
4586 if (!ring)
4587 goto err_rx_ring_allocation;
4588 ring->count = rx_count;
4589 ring->queue_index = i;
4590 ring->dev = &adapter->pdev->dev;
4591 ring->netdev = adapter->netdev;
4592 ring->numa_node = adapter->node;
4593
4594 adapter->rx_ring[i] = ring;
4595 }
4596
4597 /* Restore the adapter's original node */
4598 adapter->node = orig_node;
4599
4600 ixgbe_cache_ring_register(adapter);
4601
4602 return 0;
4603
4604 err_rx_ring_allocation:
4605 for (i = 0; i < adapter->num_tx_queues; i++)
4606 kfree(adapter->tx_ring[i]);
4607 err_tx_ring_allocation:
4608 return -ENOMEM;
4609 }
4610
4611 /**
4612 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
4613 * @adapter: board private structure to initialize
4614 *
4615 * Attempt to configure the interrupts using the best available
4616 * capabilities of the hardware and the kernel.
4617 **/
4618 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
4619 {
4620 struct ixgbe_hw *hw = &adapter->hw;
4621 int err = 0;
4622 int vector, v_budget;
4623
4624 /*
4625 * It's easy to be greedy for MSI-X vectors, but it really
4626 * doesn't do us much good if we have a lot more vectors
4627 * than CPU's. So let's be conservative and only ask for
4628 * (roughly) the same number of vectors as there are CPU's.
4629 */
4630 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
4631 (int)num_online_cpus()) + NON_Q_VECTORS;
4632
4633 /*
4634 * At the same time, hardware can only support a maximum of
4635 * hw.mac->max_msix_vectors vectors. With features
4636 * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
4637 * descriptor queues supported by our device. Thus, we cap it off in
4638 * those rare cases where the cpu count also exceeds our vector limit.
4639 */
4640 v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
4641
4642 /* A failure in MSI-X entry allocation isn't fatal, but it does
4643 * mean we disable MSI-X capabilities of the adapter. */
4644 adapter->msix_entries = kcalloc(v_budget,
4645 sizeof(struct msix_entry), GFP_KERNEL);
4646 if (adapter->msix_entries) {
4647 for (vector = 0; vector < v_budget; vector++)
4648 adapter->msix_entries[vector].entry = vector;
4649
4650 ixgbe_acquire_msix_vectors(adapter, v_budget);
4651
4652 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4653 goto out;
4654 }
4655
4656 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
4657 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
4658 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4659 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4660 adapter->atr_sample_rate = 0;
4661 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4662 ixgbe_disable_sriov(adapter);
4663
4664 err = ixgbe_set_num_queues(adapter);
4665 if (err)
4666 return err;
4667
4668 err = pci_enable_msi(adapter->pdev);
4669 if (!err) {
4670 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
4671 } else {
4672 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4673 "Unable to allocate MSI interrupt, "
4674 "falling back to legacy. Error: %d\n", err);
4675 /* reset err */
4676 err = 0;
4677 }
4678
4679 out:
4680 return err;
4681 }
4682
4683 /**
4684 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
4685 * @adapter: board private structure to initialize
4686 *
4687 * We allocate one q_vector per queue interrupt. If allocation fails we
4688 * return -ENOMEM.
4689 **/
4690 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
4691 {
4692 int q_idx, num_q_vectors;
4693 struct ixgbe_q_vector *q_vector;
4694 int napi_vectors;
4695 int (*poll)(struct napi_struct *, int);
4696
4697 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4698 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4699 napi_vectors = adapter->num_rx_queues;
4700 poll = &ixgbe_clean_rxtx_many;
4701 } else {
4702 num_q_vectors = 1;
4703 napi_vectors = 1;
4704 poll = &ixgbe_poll;
4705 }
4706
4707 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4708 q_vector = kzalloc_node(sizeof(struct ixgbe_q_vector),
4709 GFP_KERNEL, adapter->node);
4710 if (!q_vector)
4711 q_vector = kzalloc(sizeof(struct ixgbe_q_vector),
4712 GFP_KERNEL);
4713 if (!q_vector)
4714 goto err_out;
4715 q_vector->adapter = adapter;
4716 if (q_vector->txr_count && !q_vector->rxr_count)
4717 q_vector->eitr = adapter->tx_eitr_param;
4718 else
4719 q_vector->eitr = adapter->rx_eitr_param;
4720 q_vector->v_idx = q_idx;
4721 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
4722 adapter->q_vector[q_idx] = q_vector;
4723 }
4724
4725 return 0;
4726
4727 err_out:
4728 while (q_idx) {
4729 q_idx--;
4730 q_vector = adapter->q_vector[q_idx];
4731 netif_napi_del(&q_vector->napi);
4732 kfree(q_vector);
4733 adapter->q_vector[q_idx] = NULL;
4734 }
4735 return -ENOMEM;
4736 }
4737
4738 /**
4739 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
4740 * @adapter: board private structure to initialize
4741 *
4742 * This function frees the memory allocated to the q_vectors. In addition if
4743 * NAPI is enabled it will delete any references to the NAPI struct prior
4744 * to freeing the q_vector.
4745 **/
4746 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
4747 {
4748 int q_idx, num_q_vectors;
4749
4750 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4751 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4752 else
4753 num_q_vectors = 1;
4754
4755 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4756 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
4757 adapter->q_vector[q_idx] = NULL;
4758 netif_napi_del(&q_vector->napi);
4759 kfree(q_vector);
4760 }
4761 }
4762
4763 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
4764 {
4765 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4766 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4767 pci_disable_msix(adapter->pdev);
4768 kfree(adapter->msix_entries);
4769 adapter->msix_entries = NULL;
4770 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
4771 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
4772 pci_disable_msi(adapter->pdev);
4773 }
4774 }
4775
4776 /**
4777 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
4778 * @adapter: board private structure to initialize
4779 *
4780 * We determine which interrupt scheme to use based on...
4781 * - Kernel support (MSI, MSI-X)
4782 * - which can be user-defined (via MODULE_PARAM)
4783 * - Hardware queue count (num_*_queues)
4784 * - defined by miscellaneous hardware support/features (RSS, etc.)
4785 **/
4786 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
4787 {
4788 int err;
4789
4790 /* Number of supported queues */
4791 err = ixgbe_set_num_queues(adapter);
4792 if (err)
4793 return err;
4794
4795 err = ixgbe_set_interrupt_capability(adapter);
4796 if (err) {
4797 e_dev_err("Unable to setup interrupt capabilities\n");
4798 goto err_set_interrupt;
4799 }
4800
4801 err = ixgbe_alloc_q_vectors(adapter);
4802 if (err) {
4803 e_dev_err("Unable to allocate memory for queue vectors\n");
4804 goto err_alloc_q_vectors;
4805 }
4806
4807 err = ixgbe_alloc_queues(adapter);
4808 if (err) {
4809 e_dev_err("Unable to allocate memory for queues\n");
4810 goto err_alloc_queues;
4811 }
4812
4813 e_dev_info("Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u\n",
4814 (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
4815 adapter->num_rx_queues, adapter->num_tx_queues);
4816
4817 set_bit(__IXGBE_DOWN, &adapter->state);
4818
4819 return 0;
4820
4821 err_alloc_queues:
4822 ixgbe_free_q_vectors(adapter);
4823 err_alloc_q_vectors:
4824 ixgbe_reset_interrupt_capability(adapter);
4825 err_set_interrupt:
4826 return err;
4827 }
4828
4829 static void ring_free_rcu(struct rcu_head *head)
4830 {
4831 kfree(container_of(head, struct ixgbe_ring, rcu));
4832 }
4833
4834 /**
4835 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
4836 * @adapter: board private structure to clear interrupt scheme on
4837 *
4838 * We go through and clear interrupt specific resources and reset the structure
4839 * to pre-load conditions
4840 **/
4841 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
4842 {
4843 int i;
4844
4845 for (i = 0; i < adapter->num_tx_queues; i++) {
4846 kfree(adapter->tx_ring[i]);
4847 adapter->tx_ring[i] = NULL;
4848 }
4849 for (i = 0; i < adapter->num_rx_queues; i++) {
4850 struct ixgbe_ring *ring = adapter->rx_ring[i];
4851
4852 /* ixgbe_get_stats64() might access this ring, we must wait
4853 * a grace period before freeing it.
4854 */
4855 call_rcu(&ring->rcu, ring_free_rcu);
4856 adapter->rx_ring[i] = NULL;
4857 }
4858
4859 ixgbe_free_q_vectors(adapter);
4860 ixgbe_reset_interrupt_capability(adapter);
4861 }
4862
4863 /**
4864 * ixgbe_sfp_timer - worker thread to find a missing module
4865 * @data: pointer to our adapter struct
4866 **/
4867 static void ixgbe_sfp_timer(unsigned long data)
4868 {
4869 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4870
4871 /*
4872 * Do the sfp_timer outside of interrupt context due to the
4873 * delays that sfp+ detection requires
4874 */
4875 schedule_work(&adapter->sfp_task);
4876 }
4877
4878 /**
4879 * ixgbe_sfp_task - worker thread to find a missing module
4880 * @work: pointer to work_struct containing our data
4881 **/
4882 static void ixgbe_sfp_task(struct work_struct *work)
4883 {
4884 struct ixgbe_adapter *adapter = container_of(work,
4885 struct ixgbe_adapter,
4886 sfp_task);
4887 struct ixgbe_hw *hw = &adapter->hw;
4888
4889 if ((hw->phy.type == ixgbe_phy_nl) &&
4890 (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
4891 s32 ret = hw->phy.ops.identify_sfp(hw);
4892 if (ret == IXGBE_ERR_SFP_NOT_PRESENT)
4893 goto reschedule;
4894 ret = hw->phy.ops.reset(hw);
4895 if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
4896 e_dev_err("failed to initialize because an unsupported "
4897 "SFP+ module type was detected.\n");
4898 e_dev_err("Reload the driver after installing a "
4899 "supported module.\n");
4900 unregister_netdev(adapter->netdev);
4901 } else {
4902 e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
4903 }
4904 /* don't need this routine any more */
4905 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
4906 }
4907 return;
4908 reschedule:
4909 if (test_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state))
4910 mod_timer(&adapter->sfp_timer,
4911 round_jiffies(jiffies + (2 * HZ)));
4912 }
4913
4914 /**
4915 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
4916 * @adapter: board private structure to initialize
4917 *
4918 * ixgbe_sw_init initializes the Adapter private data structure.
4919 * Fields are initialized based on PCI device information and
4920 * OS network device settings (MTU size).
4921 **/
4922 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
4923 {
4924 struct ixgbe_hw *hw = &adapter->hw;
4925 struct pci_dev *pdev = adapter->pdev;
4926 struct net_device *dev = adapter->netdev;
4927 unsigned int rss;
4928 #ifdef CONFIG_IXGBE_DCB
4929 int j;
4930 struct tc_configuration *tc;
4931 #endif
4932 int max_frame = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
4933
4934 /* PCI config space info */
4935
4936 hw->vendor_id = pdev->vendor;
4937 hw->device_id = pdev->device;
4938 hw->revision_id = pdev->revision;
4939 hw->subsystem_vendor_id = pdev->subsystem_vendor;
4940 hw->subsystem_device_id = pdev->subsystem_device;
4941
4942 /* Set capability flags */
4943 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
4944 adapter->ring_feature[RING_F_RSS].indices = rss;
4945 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
4946 adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
4947 switch (hw->mac.type) {
4948 case ixgbe_mac_82598EB:
4949 if (hw->device_id == IXGBE_DEV_ID_82598AT)
4950 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
4951 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
4952 break;
4953 case ixgbe_mac_82599EB:
4954 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
4955 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
4956 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
4957 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
4958 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
4959 if (dev->features & NETIF_F_NTUPLE) {
4960 /* Flow Director perfect filter enabled */
4961 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4962 adapter->atr_sample_rate = 0;
4963 spin_lock_init(&adapter->fdir_perfect_lock);
4964 } else {
4965 /* Flow Director hash filters enabled */
4966 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
4967 adapter->atr_sample_rate = 20;
4968 }
4969 adapter->ring_feature[RING_F_FDIR].indices =
4970 IXGBE_MAX_FDIR_INDICES;
4971 adapter->fdir_pballoc = 0;
4972 #ifdef IXGBE_FCOE
4973 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
4974 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
4975 adapter->ring_feature[RING_F_FCOE].indices = 0;
4976 #ifdef CONFIG_IXGBE_DCB
4977 /* Default traffic class to use for FCoE */
4978 adapter->fcoe.tc = IXGBE_FCOE_DEFTC;
4979 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
4980 #endif
4981 #endif /* IXGBE_FCOE */
4982 break;
4983 default:
4984 break;
4985 }
4986
4987 #ifdef CONFIG_IXGBE_DCB
4988 /* Configure DCB traffic classes */
4989 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
4990 tc = &adapter->dcb_cfg.tc_config[j];
4991 tc->path[DCB_TX_CONFIG].bwg_id = 0;
4992 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
4993 tc->path[DCB_RX_CONFIG].bwg_id = 0;
4994 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
4995 tc->dcb_pfc = pfc_disabled;
4996 }
4997 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
4998 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
4999 adapter->dcb_cfg.rx_pba_cfg = pba_equal;
5000 adapter->dcb_cfg.pfc_mode_enable = false;
5001 adapter->dcb_cfg.round_robin_enable = false;
5002 adapter->dcb_set_bitmap = 0x00;
5003 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
5004 adapter->ring_feature[RING_F_DCB].indices);
5005
5006 #endif
5007
5008 /* default flow control settings */
5009 hw->fc.requested_mode = ixgbe_fc_full;
5010 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
5011 #ifdef CONFIG_DCB
5012 adapter->last_lfc_mode = hw->fc.current_mode;
5013 #endif
5014 hw->fc.high_water = FC_HIGH_WATER(max_frame);
5015 hw->fc.low_water = FC_LOW_WATER(max_frame);
5016 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
5017 hw->fc.send_xon = true;
5018 hw->fc.disable_fc_autoneg = false;
5019
5020 /* enable itr by default in dynamic mode */
5021 adapter->rx_itr_setting = 1;
5022 adapter->rx_eitr_param = 20000;
5023 adapter->tx_itr_setting = 1;
5024 adapter->tx_eitr_param = 10000;
5025
5026 /* set defaults for eitr in MegaBytes */
5027 adapter->eitr_low = 10;
5028 adapter->eitr_high = 20;
5029
5030 /* set default ring sizes */
5031 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
5032 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
5033
5034 /* initialize eeprom parameters */
5035 if (ixgbe_init_eeprom_params_generic(hw)) {
5036 e_dev_err("EEPROM initialization failed\n");
5037 return -EIO;
5038 }
5039
5040 /* enable rx csum by default */
5041 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
5042
5043 /* get assigned NUMA node */
5044 adapter->node = dev_to_node(&pdev->dev);
5045
5046 set_bit(__IXGBE_DOWN, &adapter->state);
5047
5048 return 0;
5049 }
5050
5051 /**
5052 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
5053 * @tx_ring: tx descriptor ring (for a specific queue) to setup
5054 *
5055 * Return 0 on success, negative on failure
5056 **/
5057 int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
5058 {
5059 struct device *dev = tx_ring->dev;
5060 int size;
5061
5062 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
5063 tx_ring->tx_buffer_info = vmalloc_node(size, tx_ring->numa_node);
5064 if (!tx_ring->tx_buffer_info)
5065 tx_ring->tx_buffer_info = vmalloc(size);
5066 if (!tx_ring->tx_buffer_info)
5067 goto err;
5068 memset(tx_ring->tx_buffer_info, 0, size);
5069
5070 /* round up to nearest 4K */
5071 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
5072 tx_ring->size = ALIGN(tx_ring->size, 4096);
5073
5074 tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
5075 &tx_ring->dma, GFP_KERNEL);
5076 if (!tx_ring->desc)
5077 goto err;
5078
5079 tx_ring->next_to_use = 0;
5080 tx_ring->next_to_clean = 0;
5081 tx_ring->work_limit = tx_ring->count;
5082 return 0;
5083
5084 err:
5085 vfree(tx_ring->tx_buffer_info);
5086 tx_ring->tx_buffer_info = NULL;
5087 dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n");
5088 return -ENOMEM;
5089 }
5090
5091 /**
5092 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
5093 * @adapter: board private structure
5094 *
5095 * If this function returns with an error, then it's possible one or
5096 * more of the rings is populated (while the rest are not). It is the
5097 * callers duty to clean those orphaned rings.
5098 *
5099 * Return 0 on success, negative on failure
5100 **/
5101 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
5102 {
5103 int i, err = 0;
5104
5105 for (i = 0; i < adapter->num_tx_queues; i++) {
5106 err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
5107 if (!err)
5108 continue;
5109 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
5110 break;
5111 }
5112
5113 return err;
5114 }
5115
5116 /**
5117 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
5118 * @rx_ring: rx descriptor ring (for a specific queue) to setup
5119 *
5120 * Returns 0 on success, negative on failure
5121 **/
5122 int ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring)
5123 {
5124 struct device *dev = rx_ring->dev;
5125 int size;
5126
5127 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
5128 rx_ring->rx_buffer_info = vmalloc_node(size, rx_ring->numa_node);
5129 if (!rx_ring->rx_buffer_info)
5130 rx_ring->rx_buffer_info = vmalloc(size);
5131 if (!rx_ring->rx_buffer_info)
5132 goto err;
5133 memset(rx_ring->rx_buffer_info, 0, size);
5134
5135 /* Round up to nearest 4K */
5136 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
5137 rx_ring->size = ALIGN(rx_ring->size, 4096);
5138
5139 rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
5140 &rx_ring->dma, GFP_KERNEL);
5141
5142 if (!rx_ring->desc)
5143 goto err;
5144
5145 rx_ring->next_to_clean = 0;
5146 rx_ring->next_to_use = 0;
5147
5148 return 0;
5149 err:
5150 vfree(rx_ring->rx_buffer_info);
5151 rx_ring->rx_buffer_info = NULL;
5152 dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");
5153 return -ENOMEM;
5154 }
5155
5156 /**
5157 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
5158 * @adapter: board private structure
5159 *
5160 * If this function returns with an error, then it's possible one or
5161 * more of the rings is populated (while the rest are not). It is the
5162 * callers duty to clean those orphaned rings.
5163 *
5164 * Return 0 on success, negative on failure
5165 **/
5166 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
5167 {
5168 int i, err = 0;
5169
5170 for (i = 0; i < adapter->num_rx_queues; i++) {
5171 err = ixgbe_setup_rx_resources(adapter->rx_ring[i]);
5172 if (!err)
5173 continue;
5174 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
5175 break;
5176 }
5177
5178 return err;
5179 }
5180
5181 /**
5182 * ixgbe_free_tx_resources - Free Tx Resources per Queue
5183 * @tx_ring: Tx descriptor ring for a specific queue
5184 *
5185 * Free all transmit software resources
5186 **/
5187 void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring)
5188 {
5189 ixgbe_clean_tx_ring(tx_ring);
5190
5191 vfree(tx_ring->tx_buffer_info);
5192 tx_ring->tx_buffer_info = NULL;
5193
5194 /* if not set, then don't free */
5195 if (!tx_ring->desc)
5196 return;
5197
5198 dma_free_coherent(tx_ring->dev, tx_ring->size,
5199 tx_ring->desc, tx_ring->dma);
5200
5201 tx_ring->desc = NULL;
5202 }
5203
5204 /**
5205 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
5206 * @adapter: board private structure
5207 *
5208 * Free all transmit software resources
5209 **/
5210 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
5211 {
5212 int i;
5213
5214 for (i = 0; i < adapter->num_tx_queues; i++)
5215 if (adapter->tx_ring[i]->desc)
5216 ixgbe_free_tx_resources(adapter->tx_ring[i]);
5217 }
5218
5219 /**
5220 * ixgbe_free_rx_resources - Free Rx Resources
5221 * @rx_ring: ring to clean the resources from
5222 *
5223 * Free all receive software resources
5224 **/
5225 void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring)
5226 {
5227 ixgbe_clean_rx_ring(rx_ring);
5228
5229 vfree(rx_ring->rx_buffer_info);
5230 rx_ring->rx_buffer_info = NULL;
5231
5232 /* if not set, then don't free */
5233 if (!rx_ring->desc)
5234 return;
5235
5236 dma_free_coherent(rx_ring->dev, rx_ring->size,
5237 rx_ring->desc, rx_ring->dma);
5238
5239 rx_ring->desc = NULL;
5240 }
5241
5242 /**
5243 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
5244 * @adapter: board private structure
5245 *
5246 * Free all receive software resources
5247 **/
5248 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
5249 {
5250 int i;
5251
5252 for (i = 0; i < adapter->num_rx_queues; i++)
5253 if (adapter->rx_ring[i]->desc)
5254 ixgbe_free_rx_resources(adapter->rx_ring[i]);
5255 }
5256
5257 /**
5258 * ixgbe_change_mtu - Change the Maximum Transfer Unit
5259 * @netdev: network interface device structure
5260 * @new_mtu: new value for maximum frame size
5261 *
5262 * Returns 0 on success, negative on failure
5263 **/
5264 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
5265 {
5266 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5267 struct ixgbe_hw *hw = &adapter->hw;
5268 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5269
5270 /* MTU < 68 is an error and causes problems on some kernels */
5271 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
5272 return -EINVAL;
5273
5274 e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5275 /* must set new MTU before calling down or up */
5276 netdev->mtu = new_mtu;
5277
5278 hw->fc.high_water = FC_HIGH_WATER(max_frame);
5279 hw->fc.low_water = FC_LOW_WATER(max_frame);
5280
5281 if (netif_running(netdev))
5282 ixgbe_reinit_locked(adapter);
5283
5284 return 0;
5285 }
5286
5287 /**
5288 * ixgbe_open - Called when a network interface is made active
5289 * @netdev: network interface device structure
5290 *
5291 * Returns 0 on success, negative value on failure
5292 *
5293 * The open entry point is called when a network interface is made
5294 * active by the system (IFF_UP). At this point all resources needed
5295 * for transmit and receive operations are allocated, the interrupt
5296 * handler is registered with the OS, the watchdog timer is started,
5297 * and the stack is notified that the interface is ready.
5298 **/
5299 static int ixgbe_open(struct net_device *netdev)
5300 {
5301 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5302 int err;
5303
5304 /* disallow open during test */
5305 if (test_bit(__IXGBE_TESTING, &adapter->state))
5306 return -EBUSY;
5307
5308 netif_carrier_off(netdev);
5309
5310 /* allocate transmit descriptors */
5311 err = ixgbe_setup_all_tx_resources(adapter);
5312 if (err)
5313 goto err_setup_tx;
5314
5315 /* allocate receive descriptors */
5316 err = ixgbe_setup_all_rx_resources(adapter);
5317 if (err)
5318 goto err_setup_rx;
5319
5320 ixgbe_configure(adapter);
5321
5322 err = ixgbe_request_irq(adapter);
5323 if (err)
5324 goto err_req_irq;
5325
5326 err = ixgbe_up_complete(adapter);
5327 if (err)
5328 goto err_up;
5329
5330 netif_tx_start_all_queues(netdev);
5331
5332 return 0;
5333
5334 err_up:
5335 ixgbe_release_hw_control(adapter);
5336 ixgbe_free_irq(adapter);
5337 err_req_irq:
5338 err_setup_rx:
5339 ixgbe_free_all_rx_resources(adapter);
5340 err_setup_tx:
5341 ixgbe_free_all_tx_resources(adapter);
5342 ixgbe_reset(adapter);
5343
5344 return err;
5345 }
5346
5347 /**
5348 * ixgbe_close - Disables a network interface
5349 * @netdev: network interface device structure
5350 *
5351 * Returns 0, this is not allowed to fail
5352 *
5353 * The close entry point is called when an interface is de-activated
5354 * by the OS. The hardware is still under the drivers control, but
5355 * needs to be disabled. A global MAC reset is issued to stop the
5356 * hardware, and all transmit and receive resources are freed.
5357 **/
5358 static int ixgbe_close(struct net_device *netdev)
5359 {
5360 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5361
5362 ixgbe_down(adapter);
5363 ixgbe_free_irq(adapter);
5364
5365 ixgbe_free_all_tx_resources(adapter);
5366 ixgbe_free_all_rx_resources(adapter);
5367
5368 ixgbe_release_hw_control(adapter);
5369
5370 return 0;
5371 }
5372
5373 #ifdef CONFIG_PM
5374 static int ixgbe_resume(struct pci_dev *pdev)
5375 {
5376 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5377 struct net_device *netdev = adapter->netdev;
5378 u32 err;
5379
5380 pci_set_power_state(pdev, PCI_D0);
5381 pci_restore_state(pdev);
5382 /*
5383 * pci_restore_state clears dev->state_saved so call
5384 * pci_save_state to restore it.
5385 */
5386 pci_save_state(pdev);
5387
5388 err = pci_enable_device_mem(pdev);
5389 if (err) {
5390 e_dev_err("Cannot enable PCI device from suspend\n");
5391 return err;
5392 }
5393 pci_set_master(pdev);
5394
5395 pci_wake_from_d3(pdev, false);
5396
5397 err = ixgbe_init_interrupt_scheme(adapter);
5398 if (err) {
5399 e_dev_err("Cannot initialize interrupts for device\n");
5400 return err;
5401 }
5402
5403 ixgbe_reset(adapter);
5404
5405 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5406
5407 if (netif_running(netdev)) {
5408 err = ixgbe_open(netdev);
5409 if (err)
5410 return err;
5411 }
5412
5413 netif_device_attach(netdev);
5414
5415 return 0;
5416 }
5417 #endif /* CONFIG_PM */
5418
5419 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
5420 {
5421 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5422 struct net_device *netdev = adapter->netdev;
5423 struct ixgbe_hw *hw = &adapter->hw;
5424 u32 ctrl, fctrl;
5425 u32 wufc = adapter->wol;
5426 #ifdef CONFIG_PM
5427 int retval = 0;
5428 #endif
5429
5430 netif_device_detach(netdev);
5431
5432 if (netif_running(netdev)) {
5433 ixgbe_down(adapter);
5434 ixgbe_free_irq(adapter);
5435 ixgbe_free_all_tx_resources(adapter);
5436 ixgbe_free_all_rx_resources(adapter);
5437 }
5438
5439 ixgbe_clear_interrupt_scheme(adapter);
5440
5441 #ifdef CONFIG_PM
5442 retval = pci_save_state(pdev);
5443 if (retval)
5444 return retval;
5445
5446 #endif
5447 if (wufc) {
5448 ixgbe_set_rx_mode(netdev);
5449
5450 /* turn on all-multi mode if wake on multicast is enabled */
5451 if (wufc & IXGBE_WUFC_MC) {
5452 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5453 fctrl |= IXGBE_FCTRL_MPE;
5454 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
5455 }
5456
5457 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
5458 ctrl |= IXGBE_CTRL_GIO_DIS;
5459 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
5460
5461 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
5462 } else {
5463 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
5464 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
5465 }
5466
5467 switch (hw->mac.type) {
5468 case ixgbe_mac_82598EB:
5469 pci_wake_from_d3(pdev, false);
5470 break;
5471 case ixgbe_mac_82599EB:
5472 pci_wake_from_d3(pdev, !!wufc);
5473 break;
5474 default:
5475 break;
5476 }
5477
5478 *enable_wake = !!wufc;
5479
5480 ixgbe_release_hw_control(adapter);
5481
5482 pci_disable_device(pdev);
5483
5484 return 0;
5485 }
5486
5487 #ifdef CONFIG_PM
5488 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
5489 {
5490 int retval;
5491 bool wake;
5492
5493 retval = __ixgbe_shutdown(pdev, &wake);
5494 if (retval)
5495 return retval;
5496
5497 if (wake) {
5498 pci_prepare_to_sleep(pdev);
5499 } else {
5500 pci_wake_from_d3(pdev, false);
5501 pci_set_power_state(pdev, PCI_D3hot);
5502 }
5503
5504 return 0;
5505 }
5506 #endif /* CONFIG_PM */
5507
5508 static void ixgbe_shutdown(struct pci_dev *pdev)
5509 {
5510 bool wake;
5511
5512 __ixgbe_shutdown(pdev, &wake);
5513
5514 if (system_state == SYSTEM_POWER_OFF) {
5515 pci_wake_from_d3(pdev, wake);
5516 pci_set_power_state(pdev, PCI_D3hot);
5517 }
5518 }
5519
5520 /**
5521 * ixgbe_update_stats - Update the board statistics counters.
5522 * @adapter: board private structure
5523 **/
5524 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
5525 {
5526 struct net_device *netdev = adapter->netdev;
5527 struct ixgbe_hw *hw = &adapter->hw;
5528 struct ixgbe_hw_stats *hwstats = &adapter->stats;
5529 u64 total_mpc = 0;
5530 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
5531 u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
5532 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
5533 u64 bytes = 0, packets = 0;
5534
5535 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5536 test_bit(__IXGBE_RESETTING, &adapter->state))
5537 return;
5538
5539 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
5540 u64 rsc_count = 0;
5541 u64 rsc_flush = 0;
5542 for (i = 0; i < 16; i++)
5543 adapter->hw_rx_no_dma_resources +=
5544 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5545 for (i = 0; i < adapter->num_rx_queues; i++) {
5546 rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
5547 rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
5548 }
5549 adapter->rsc_total_count = rsc_count;
5550 adapter->rsc_total_flush = rsc_flush;
5551 }
5552
5553 for (i = 0; i < adapter->num_rx_queues; i++) {
5554 struct ixgbe_ring *rx_ring = adapter->rx_ring[i];
5555 non_eop_descs += rx_ring->rx_stats.non_eop_descs;
5556 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
5557 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
5558 bytes += rx_ring->stats.bytes;
5559 packets += rx_ring->stats.packets;
5560 }
5561 adapter->non_eop_descs = non_eop_descs;
5562 adapter->alloc_rx_page_failed = alloc_rx_page_failed;
5563 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
5564 netdev->stats.rx_bytes = bytes;
5565 netdev->stats.rx_packets = packets;
5566
5567 bytes = 0;
5568 packets = 0;
5569 /* gather some stats to the adapter struct that are per queue */
5570 for (i = 0; i < adapter->num_tx_queues; i++) {
5571 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
5572 restart_queue += tx_ring->tx_stats.restart_queue;
5573 tx_busy += tx_ring->tx_stats.tx_busy;
5574 bytes += tx_ring->stats.bytes;
5575 packets += tx_ring->stats.packets;
5576 }
5577 adapter->restart_queue = restart_queue;
5578 adapter->tx_busy = tx_busy;
5579 netdev->stats.tx_bytes = bytes;
5580 netdev->stats.tx_packets = packets;
5581
5582 hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
5583 for (i = 0; i < 8; i++) {
5584 /* for packet buffers not used, the register should read 0 */
5585 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
5586 missed_rx += mpc;
5587 hwstats->mpc[i] += mpc;
5588 total_mpc += hwstats->mpc[i];
5589 if (hw->mac.type == ixgbe_mac_82598EB)
5590 hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
5591 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
5592 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
5593 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
5594 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
5595 switch (hw->mac.type) {
5596 case ixgbe_mac_82598EB:
5597 hwstats->pxonrxc[i] +=
5598 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
5599 hwstats->pxoffrxc[i] +=
5600 IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
5601 break;
5602 case ixgbe_mac_82599EB:
5603 hwstats->pxonrxc[i] +=
5604 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
5605 hwstats->pxoffrxc[i] +=
5606 IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
5607 break;
5608 default:
5609 break;
5610 }
5611 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
5612 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
5613 }
5614 hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
5615 /* work around hardware counting issue */
5616 hwstats->gprc -= missed_rx;
5617
5618 /* 82598 hardware only has a 32 bit counter in the high register */
5619 switch (hw->mac.type) {
5620 case ixgbe_mac_82598EB:
5621 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
5622 hwstats->lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
5623 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
5624 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
5625 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
5626 break;
5627 case ixgbe_mac_82599EB:
5628 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
5629 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
5630 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
5631 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
5632 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
5633 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
5634 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
5635 hwstats->lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
5636 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
5637 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
5638 #ifdef IXGBE_FCOE
5639 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
5640 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
5641 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
5642 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
5643 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
5644 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
5645 #endif /* IXGBE_FCOE */
5646 break;
5647 default:
5648 break;
5649 }
5650 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
5651 hwstats->bprc += bprc;
5652 hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
5653 if (hw->mac.type == ixgbe_mac_82598EB)
5654 hwstats->mprc -= bprc;
5655 hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
5656 hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
5657 hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
5658 hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
5659 hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
5660 hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
5661 hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
5662 hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
5663 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
5664 hwstats->lxontxc += lxon;
5665 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
5666 hwstats->lxofftxc += lxoff;
5667 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5668 hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
5669 hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
5670 /*
5671 * 82598 errata - tx of flow control packets is included in tx counters
5672 */
5673 xon_off_tot = lxon + lxoff;
5674 hwstats->gptc -= xon_off_tot;
5675 hwstats->mptc -= xon_off_tot;
5676 hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
5677 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5678 hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
5679 hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
5680 hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
5681 hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
5682 hwstats->ptc64 -= xon_off_tot;
5683 hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
5684 hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
5685 hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
5686 hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
5687 hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
5688 hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
5689
5690 /* Fill out the OS statistics structure */
5691 netdev->stats.multicast = hwstats->mprc;
5692
5693 /* Rx Errors */
5694 netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
5695 netdev->stats.rx_dropped = 0;
5696 netdev->stats.rx_length_errors = hwstats->rlec;
5697 netdev->stats.rx_crc_errors = hwstats->crcerrs;
5698 netdev->stats.rx_missed_errors = total_mpc;
5699 }
5700
5701 /**
5702 * ixgbe_watchdog - Timer Call-back
5703 * @data: pointer to adapter cast into an unsigned long
5704 **/
5705 static void ixgbe_watchdog(unsigned long data)
5706 {
5707 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
5708 struct ixgbe_hw *hw = &adapter->hw;
5709 u64 eics = 0;
5710 int i;
5711
5712 /*
5713 * Do the watchdog outside of interrupt context due to the lovely
5714 * delays that some of the newer hardware requires
5715 */
5716
5717 if (test_bit(__IXGBE_DOWN, &adapter->state))
5718 goto watchdog_short_circuit;
5719
5720 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
5721 /*
5722 * for legacy and MSI interrupts don't set any bits
5723 * that are enabled for EIAM, because this operation
5724 * would set *both* EIMS and EICS for any bit in EIAM
5725 */
5726 IXGBE_WRITE_REG(hw, IXGBE_EICS,
5727 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
5728 goto watchdog_reschedule;
5729 }
5730
5731 /* get one bit for every active tx/rx interrupt vector */
5732 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
5733 struct ixgbe_q_vector *qv = adapter->q_vector[i];
5734 if (qv->rxr_count || qv->txr_count)
5735 eics |= ((u64)1 << i);
5736 }
5737
5738 /* Cause software interrupt to ensure rx rings are cleaned */
5739 ixgbe_irq_rearm_queues(adapter, eics);
5740
5741 watchdog_reschedule:
5742 /* Reset the timer */
5743 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
5744
5745 watchdog_short_circuit:
5746 schedule_work(&adapter->watchdog_task);
5747 }
5748
5749 /**
5750 * ixgbe_multispeed_fiber_task - worker thread to configure multispeed fiber
5751 * @work: pointer to work_struct containing our data
5752 **/
5753 static void ixgbe_multispeed_fiber_task(struct work_struct *work)
5754 {
5755 struct ixgbe_adapter *adapter = container_of(work,
5756 struct ixgbe_adapter,
5757 multispeed_fiber_task);
5758 struct ixgbe_hw *hw = &adapter->hw;
5759 u32 autoneg;
5760 bool negotiation;
5761
5762 adapter->flags |= IXGBE_FLAG_IN_SFP_LINK_TASK;
5763 autoneg = hw->phy.autoneg_advertised;
5764 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
5765 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
5766 hw->mac.autotry_restart = false;
5767 if (hw->mac.ops.setup_link)
5768 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
5769 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
5770 adapter->flags &= ~IXGBE_FLAG_IN_SFP_LINK_TASK;
5771 }
5772
5773 /**
5774 * ixgbe_sfp_config_module_task - worker thread to configure a new SFP+ module
5775 * @work: pointer to work_struct containing our data
5776 **/
5777 static void ixgbe_sfp_config_module_task(struct work_struct *work)
5778 {
5779 struct ixgbe_adapter *adapter = container_of(work,
5780 struct ixgbe_adapter,
5781 sfp_config_module_task);
5782 struct ixgbe_hw *hw = &adapter->hw;
5783 u32 err;
5784
5785 adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
5786
5787 /* Time for electrical oscillations to settle down */
5788 msleep(100);
5789 err = hw->phy.ops.identify_sfp(hw);
5790
5791 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5792 e_dev_err("failed to initialize because an unsupported SFP+ "
5793 "module type was detected.\n");
5794 e_dev_err("Reload the driver after installing a supported "
5795 "module.\n");
5796 unregister_netdev(adapter->netdev);
5797 return;
5798 }
5799 hw->mac.ops.setup_sfp(hw);
5800
5801 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
5802 /* This will also work for DA Twinax connections */
5803 schedule_work(&adapter->multispeed_fiber_task);
5804 adapter->flags &= ~IXGBE_FLAG_IN_SFP_MOD_TASK;
5805 }
5806
5807 /**
5808 * ixgbe_fdir_reinit_task - worker thread to reinit FDIR filter table
5809 * @work: pointer to work_struct containing our data
5810 **/
5811 static void ixgbe_fdir_reinit_task(struct work_struct *work)
5812 {
5813 struct ixgbe_adapter *adapter = container_of(work,
5814 struct ixgbe_adapter,
5815 fdir_reinit_task);
5816 struct ixgbe_hw *hw = &adapter->hw;
5817 int i;
5818
5819 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
5820 for (i = 0; i < adapter->num_tx_queues; i++)
5821 set_bit(__IXGBE_TX_FDIR_INIT_DONE,
5822 &(adapter->tx_ring[i]->state));
5823 } else {
5824 e_err(probe, "failed to finish FDIR re-initialization, "
5825 "ignored adding FDIR ATR filters\n");
5826 }
5827 /* Done FDIR Re-initialization, enable transmits */
5828 netif_tx_start_all_queues(adapter->netdev);
5829 }
5830
5831 static DEFINE_MUTEX(ixgbe_watchdog_lock);
5832
5833 /**
5834 * ixgbe_watchdog_task - worker thread to bring link up
5835 * @work: pointer to work_struct containing our data
5836 **/
5837 static void ixgbe_watchdog_task(struct work_struct *work)
5838 {
5839 struct ixgbe_adapter *adapter = container_of(work,
5840 struct ixgbe_adapter,
5841 watchdog_task);
5842 struct net_device *netdev = adapter->netdev;
5843 struct ixgbe_hw *hw = &adapter->hw;
5844 u32 link_speed;
5845 bool link_up;
5846 int i;
5847 struct ixgbe_ring *tx_ring;
5848 int some_tx_pending = 0;
5849
5850 mutex_lock(&ixgbe_watchdog_lock);
5851
5852 link_up = adapter->link_up;
5853 link_speed = adapter->link_speed;
5854
5855 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
5856 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
5857 if (link_up) {
5858 #ifdef CONFIG_DCB
5859 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5860 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
5861 hw->mac.ops.fc_enable(hw, i);
5862 } else {
5863 hw->mac.ops.fc_enable(hw, 0);
5864 }
5865 #else
5866 hw->mac.ops.fc_enable(hw, 0);
5867 #endif
5868 }
5869
5870 if (link_up ||
5871 time_after(jiffies, (adapter->link_check_timeout +
5872 IXGBE_TRY_LINK_TIMEOUT))) {
5873 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5874 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
5875 }
5876 adapter->link_up = link_up;
5877 adapter->link_speed = link_speed;
5878 }
5879
5880 if (link_up) {
5881 if (!netif_carrier_ok(netdev)) {
5882 bool flow_rx, flow_tx;
5883
5884 switch (hw->mac.type) {
5885 case ixgbe_mac_82598EB: {
5886 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5887 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
5888 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
5889 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
5890 }
5891 break;
5892 case ixgbe_mac_82599EB: {
5893 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
5894 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
5895 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
5896 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
5897 }
5898 break;
5899 default:
5900 flow_tx = false;
5901 flow_rx = false;
5902 break;
5903 }
5904
5905 e_info(drv, "NIC Link is Up %s, Flow Control: %s\n",
5906 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
5907 "10 Gbps" :
5908 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
5909 "1 Gbps" : "unknown speed")),
5910 ((flow_rx && flow_tx) ? "RX/TX" :
5911 (flow_rx ? "RX" :
5912 (flow_tx ? "TX" : "None"))));
5913
5914 netif_carrier_on(netdev);
5915 } else {
5916 /* Force detection of hung controller */
5917 for (i = 0; i < adapter->num_tx_queues; i++) {
5918 tx_ring = adapter->tx_ring[i];
5919 set_check_for_tx_hang(tx_ring);
5920 }
5921 }
5922 } else {
5923 adapter->link_up = false;
5924 adapter->link_speed = 0;
5925 if (netif_carrier_ok(netdev)) {
5926 e_info(drv, "NIC Link is Down\n");
5927 netif_carrier_off(netdev);
5928 }
5929 }
5930
5931 if (!netif_carrier_ok(netdev)) {
5932 for (i = 0; i < adapter->num_tx_queues; i++) {
5933 tx_ring = adapter->tx_ring[i];
5934 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
5935 some_tx_pending = 1;
5936 break;
5937 }
5938 }
5939
5940 if (some_tx_pending) {
5941 /* We've lost link, so the controller stops DMA,
5942 * but we've got queued Tx work that's never going
5943 * to get done, so reset controller to flush Tx.
5944 * (Do the reset outside of interrupt context).
5945 */
5946 schedule_work(&adapter->reset_task);
5947 }
5948 }
5949
5950 ixgbe_update_stats(adapter);
5951 mutex_unlock(&ixgbe_watchdog_lock);
5952 }
5953
5954 static int ixgbe_tso(struct ixgbe_adapter *adapter,
5955 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
5956 u32 tx_flags, u8 *hdr_len, __be16 protocol)
5957 {
5958 struct ixgbe_adv_tx_context_desc *context_desc;
5959 unsigned int i;
5960 int err;
5961 struct ixgbe_tx_buffer *tx_buffer_info;
5962 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
5963 u32 mss_l4len_idx, l4len;
5964
5965 if (skb_is_gso(skb)) {
5966 if (skb_header_cloned(skb)) {
5967 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
5968 if (err)
5969 return err;
5970 }
5971 l4len = tcp_hdrlen(skb);
5972 *hdr_len += l4len;
5973
5974 if (protocol == htons(ETH_P_IP)) {
5975 struct iphdr *iph = ip_hdr(skb);
5976 iph->tot_len = 0;
5977 iph->check = 0;
5978 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
5979 iph->daddr, 0,
5980 IPPROTO_TCP,
5981 0);
5982 } else if (skb_is_gso_v6(skb)) {
5983 ipv6_hdr(skb)->payload_len = 0;
5984 tcp_hdr(skb)->check =
5985 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
5986 &ipv6_hdr(skb)->daddr,
5987 0, IPPROTO_TCP, 0);
5988 }
5989
5990 i = tx_ring->next_to_use;
5991
5992 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5993 context_desc = IXGBE_TX_CTXTDESC_ADV(tx_ring, i);
5994
5995 /* VLAN MACLEN IPLEN */
5996 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5997 vlan_macip_lens |=
5998 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
5999 vlan_macip_lens |= ((skb_network_offset(skb)) <<
6000 IXGBE_ADVTXD_MACLEN_SHIFT);
6001 *hdr_len += skb_network_offset(skb);
6002 vlan_macip_lens |=
6003 (skb_transport_header(skb) - skb_network_header(skb));
6004 *hdr_len +=
6005 (skb_transport_header(skb) - skb_network_header(skb));
6006 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
6007 context_desc->seqnum_seed = 0;
6008
6009 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
6010 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
6011 IXGBE_ADVTXD_DTYP_CTXT);
6012
6013 if (protocol == htons(ETH_P_IP))
6014 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
6015 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
6016 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
6017
6018 /* MSS L4LEN IDX */
6019 mss_l4len_idx =
6020 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
6021 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
6022 /* use index 1 for TSO */
6023 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6024 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
6025
6026 tx_buffer_info->time_stamp = jiffies;
6027 tx_buffer_info->next_to_watch = i;
6028
6029 i++;
6030 if (i == tx_ring->count)
6031 i = 0;
6032 tx_ring->next_to_use = i;
6033
6034 return true;
6035 }
6036 return false;
6037 }
6038
6039 static u32 ixgbe_psum(struct ixgbe_adapter *adapter, struct sk_buff *skb,
6040 __be16 protocol)
6041 {
6042 u32 rtn = 0;
6043
6044 switch (protocol) {
6045 case cpu_to_be16(ETH_P_IP):
6046 rtn |= IXGBE_ADVTXD_TUCMD_IPV4;
6047 switch (ip_hdr(skb)->protocol) {
6048 case IPPROTO_TCP:
6049 rtn |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
6050 break;
6051 case IPPROTO_SCTP:
6052 rtn |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
6053 break;
6054 }
6055 break;
6056 case cpu_to_be16(ETH_P_IPV6):
6057 /* XXX what about other V6 headers?? */
6058 switch (ipv6_hdr(skb)->nexthdr) {
6059 case IPPROTO_TCP:
6060 rtn |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
6061 break;
6062 case IPPROTO_SCTP:
6063 rtn |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
6064 break;
6065 }
6066 break;
6067 default:
6068 if (unlikely(net_ratelimit()))
6069 e_warn(probe, "partial checksum but proto=%x!\n",
6070 protocol);
6071 break;
6072 }
6073
6074 return rtn;
6075 }
6076
6077 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
6078 struct ixgbe_ring *tx_ring,
6079 struct sk_buff *skb, u32 tx_flags,
6080 __be16 protocol)
6081 {
6082 struct ixgbe_adv_tx_context_desc *context_desc;
6083 unsigned int i;
6084 struct ixgbe_tx_buffer *tx_buffer_info;
6085 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
6086
6087 if (skb->ip_summed == CHECKSUM_PARTIAL ||
6088 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
6089 i = tx_ring->next_to_use;
6090 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6091 context_desc = IXGBE_TX_CTXTDESC_ADV(tx_ring, i);
6092
6093 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
6094 vlan_macip_lens |=
6095 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
6096 vlan_macip_lens |= (skb_network_offset(skb) <<
6097 IXGBE_ADVTXD_MACLEN_SHIFT);
6098 if (skb->ip_summed == CHECKSUM_PARTIAL)
6099 vlan_macip_lens |= (skb_transport_header(skb) -
6100 skb_network_header(skb));
6101
6102 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
6103 context_desc->seqnum_seed = 0;
6104
6105 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
6106 IXGBE_ADVTXD_DTYP_CTXT);
6107
6108 if (skb->ip_summed == CHECKSUM_PARTIAL)
6109 type_tucmd_mlhl |= ixgbe_psum(adapter, skb, protocol);
6110
6111 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
6112 /* use index zero for tx checksum offload */
6113 context_desc->mss_l4len_idx = 0;
6114
6115 tx_buffer_info->time_stamp = jiffies;
6116 tx_buffer_info->next_to_watch = i;
6117
6118 i++;
6119 if (i == tx_ring->count)
6120 i = 0;
6121 tx_ring->next_to_use = i;
6122
6123 return true;
6124 }
6125
6126 return false;
6127 }
6128
6129 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
6130 struct ixgbe_ring *tx_ring,
6131 struct sk_buff *skb, u32 tx_flags,
6132 unsigned int first, const u8 hdr_len)
6133 {
6134 struct device *dev = tx_ring->dev;
6135 struct ixgbe_tx_buffer *tx_buffer_info;
6136 unsigned int len;
6137 unsigned int total = skb->len;
6138 unsigned int offset = 0, size, count = 0, i;
6139 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
6140 unsigned int f;
6141 unsigned int bytecount = skb->len;
6142 u16 gso_segs = 1;
6143
6144 i = tx_ring->next_to_use;
6145
6146 if (tx_flags & IXGBE_TX_FLAGS_FCOE)
6147 /* excluding fcoe_crc_eof for FCoE */
6148 total -= sizeof(struct fcoe_crc_eof);
6149
6150 len = min(skb_headlen(skb), total);
6151 while (len) {
6152 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6153 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
6154
6155 tx_buffer_info->length = size;
6156 tx_buffer_info->mapped_as_page = false;
6157 tx_buffer_info->dma = dma_map_single(dev,
6158 skb->data + offset,
6159 size, DMA_TO_DEVICE);
6160 if (dma_mapping_error(dev, tx_buffer_info->dma))
6161 goto dma_error;
6162 tx_buffer_info->time_stamp = jiffies;
6163 tx_buffer_info->next_to_watch = i;
6164
6165 len -= size;
6166 total -= size;
6167 offset += size;
6168 count++;
6169
6170 if (len) {
6171 i++;
6172 if (i == tx_ring->count)
6173 i = 0;
6174 }
6175 }
6176
6177 for (f = 0; f < nr_frags; f++) {
6178 struct skb_frag_struct *frag;
6179
6180 frag = &skb_shinfo(skb)->frags[f];
6181 len = min((unsigned int)frag->size, total);
6182 offset = frag->page_offset;
6183
6184 while (len) {
6185 i++;
6186 if (i == tx_ring->count)
6187 i = 0;
6188
6189 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6190 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
6191
6192 tx_buffer_info->length = size;
6193 tx_buffer_info->dma = dma_map_page(dev,
6194 frag->page,
6195 offset, size,
6196 DMA_TO_DEVICE);
6197 tx_buffer_info->mapped_as_page = true;
6198 if (dma_mapping_error(dev, tx_buffer_info->dma))
6199 goto dma_error;
6200 tx_buffer_info->time_stamp = jiffies;
6201 tx_buffer_info->next_to_watch = i;
6202
6203 len -= size;
6204 total -= size;
6205 offset += size;
6206 count++;
6207 }
6208 if (total == 0)
6209 break;
6210 }
6211
6212 if (tx_flags & IXGBE_TX_FLAGS_TSO)
6213 gso_segs = skb_shinfo(skb)->gso_segs;
6214 #ifdef IXGBE_FCOE
6215 /* adjust for FCoE Sequence Offload */
6216 else if (tx_flags & IXGBE_TX_FLAGS_FSO)
6217 gso_segs = DIV_ROUND_UP(skb->len - hdr_len,
6218 skb_shinfo(skb)->gso_size);
6219 #endif /* IXGBE_FCOE */
6220 bytecount += (gso_segs - 1) * hdr_len;
6221
6222 /* multiply data chunks by size of headers */
6223 tx_ring->tx_buffer_info[i].bytecount = bytecount;
6224 tx_ring->tx_buffer_info[i].gso_segs = gso_segs;
6225 tx_ring->tx_buffer_info[i].skb = skb;
6226 tx_ring->tx_buffer_info[first].next_to_watch = i;
6227
6228 return count;
6229
6230 dma_error:
6231 e_dev_err("TX DMA map failed\n");
6232
6233 /* clear timestamp and dma mappings for failed tx_buffer_info map */
6234 tx_buffer_info->dma = 0;
6235 tx_buffer_info->time_stamp = 0;
6236 tx_buffer_info->next_to_watch = 0;
6237 if (count)
6238 count--;
6239
6240 /* clear timestamp and dma mappings for remaining portion of packet */
6241 while (count--) {
6242 if (i == 0)
6243 i += tx_ring->count;
6244 i--;
6245 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6246 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
6247 }
6248
6249 return 0;
6250 }
6251
6252 static void ixgbe_tx_queue(struct ixgbe_ring *tx_ring,
6253 int tx_flags, int count, u32 paylen, u8 hdr_len)
6254 {
6255 union ixgbe_adv_tx_desc *tx_desc = NULL;
6256 struct ixgbe_tx_buffer *tx_buffer_info;
6257 u32 olinfo_status = 0, cmd_type_len = 0;
6258 unsigned int i;
6259 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
6260
6261 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
6262
6263 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
6264
6265 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
6266 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
6267
6268 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
6269 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6270
6271 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6272 IXGBE_ADVTXD_POPTS_SHIFT;
6273
6274 /* use index 1 context for tso */
6275 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6276 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
6277 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
6278 IXGBE_ADVTXD_POPTS_SHIFT;
6279
6280 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
6281 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6282 IXGBE_ADVTXD_POPTS_SHIFT;
6283
6284 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6285 olinfo_status |= IXGBE_ADVTXD_CC;
6286 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6287 if (tx_flags & IXGBE_TX_FLAGS_FSO)
6288 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6289 }
6290
6291 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
6292
6293 i = tx_ring->next_to_use;
6294 while (count--) {
6295 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6296 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
6297 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
6298 tx_desc->read.cmd_type_len =
6299 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
6300 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
6301 i++;
6302 if (i == tx_ring->count)
6303 i = 0;
6304 }
6305
6306 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
6307
6308 /*
6309 * Force memory writes to complete before letting h/w
6310 * know there are new descriptors to fetch. (Only
6311 * applicable for weak-ordered memory model archs,
6312 * such as IA-64).
6313 */
6314 wmb();
6315
6316 tx_ring->next_to_use = i;
6317 writel(i, tx_ring->tail);
6318 }
6319
6320 static void ixgbe_atr(struct ixgbe_adapter *adapter, struct sk_buff *skb,
6321 u8 queue, u32 tx_flags, __be16 protocol)
6322 {
6323 struct ixgbe_atr_input atr_input;
6324 struct iphdr *iph = ip_hdr(skb);
6325 struct ethhdr *eth = (struct ethhdr *)skb->data;
6326 struct tcphdr *th;
6327 u16 vlan_id;
6328
6329 /* Right now, we support IPv4 w/ TCP only */
6330 if (protocol != htons(ETH_P_IP) ||
6331 iph->protocol != IPPROTO_TCP)
6332 return;
6333
6334 memset(&atr_input, 0, sizeof(struct ixgbe_atr_input));
6335
6336 vlan_id = (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK) >>
6337 IXGBE_TX_FLAGS_VLAN_SHIFT;
6338
6339 th = tcp_hdr(skb);
6340
6341 ixgbe_atr_set_vlan_id_82599(&atr_input, vlan_id);
6342 ixgbe_atr_set_src_port_82599(&atr_input, th->dest);
6343 ixgbe_atr_set_dst_port_82599(&atr_input, th->source);
6344 ixgbe_atr_set_flex_byte_82599(&atr_input, eth->h_proto);
6345 ixgbe_atr_set_l4type_82599(&atr_input, IXGBE_ATR_L4TYPE_TCP);
6346 /* src and dst are inverted, think how the receiver sees them */
6347 ixgbe_atr_set_src_ipv4_82599(&atr_input, iph->daddr);
6348 ixgbe_atr_set_dst_ipv4_82599(&atr_input, iph->saddr);
6349
6350 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
6351 ixgbe_fdir_add_signature_filter_82599(&adapter->hw, &atr_input, queue);
6352 }
6353
6354 static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, int size)
6355 {
6356 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
6357 /* Herbert's original patch had:
6358 * smp_mb__after_netif_stop_queue();
6359 * but since that doesn't exist yet, just open code it. */
6360 smp_mb();
6361
6362 /* We need to check again in a case another CPU has just
6363 * made room available. */
6364 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
6365 return -EBUSY;
6366
6367 /* A reprieve! - use start_queue because it doesn't call schedule */
6368 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
6369 ++tx_ring->tx_stats.restart_queue;
6370 return 0;
6371 }
6372
6373 static int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, int size)
6374 {
6375 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
6376 return 0;
6377 return __ixgbe_maybe_stop_tx(tx_ring, size);
6378 }
6379
6380 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
6381 {
6382 struct ixgbe_adapter *adapter = netdev_priv(dev);
6383 int txq = smp_processor_id();
6384 #ifdef IXGBE_FCOE
6385 __be16 protocol;
6386
6387 protocol = vlan_get_protocol(skb);
6388
6389 if ((protocol == htons(ETH_P_FCOE)) ||
6390 (protocol == htons(ETH_P_FIP))) {
6391 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
6392 txq &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
6393 txq += adapter->ring_feature[RING_F_FCOE].mask;
6394 return txq;
6395 #ifdef CONFIG_IXGBE_DCB
6396 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6397 txq = adapter->fcoe.up;
6398 return txq;
6399 #endif
6400 }
6401 }
6402 #endif
6403
6404 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
6405 while (unlikely(txq >= dev->real_num_tx_queues))
6406 txq -= dev->real_num_tx_queues;
6407 return txq;
6408 }
6409
6410 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6411 if (skb->priority == TC_PRIO_CONTROL)
6412 txq = adapter->ring_feature[RING_F_DCB].indices-1;
6413 else
6414 txq = (skb->vlan_tci & IXGBE_TX_FLAGS_VLAN_PRIO_MASK)
6415 >> 13;
6416 return txq;
6417 }
6418
6419 return skb_tx_hash(dev, skb);
6420 }
6421
6422 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
6423 struct ixgbe_adapter *adapter,
6424 struct ixgbe_ring *tx_ring)
6425 {
6426 struct net_device *netdev = tx_ring->netdev;
6427 struct netdev_queue *txq;
6428 unsigned int first;
6429 unsigned int tx_flags = 0;
6430 u8 hdr_len = 0;
6431 int tso;
6432 int count = 0;
6433 unsigned int f;
6434 __be16 protocol;
6435
6436 protocol = vlan_get_protocol(skb);
6437
6438 if (vlan_tx_tag_present(skb)) {
6439 tx_flags |= vlan_tx_tag_get(skb);
6440 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6441 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
6442 tx_flags |= ((skb->queue_mapping & 0x7) << 13);
6443 }
6444 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6445 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6446 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED &&
6447 skb->priority != TC_PRIO_CONTROL) {
6448 tx_flags |= ((skb->queue_mapping & 0x7) << 13);
6449 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6450 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6451 }
6452
6453 #ifdef IXGBE_FCOE
6454 /* for FCoE with DCB, we force the priority to what
6455 * was specified by the switch */
6456 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED &&
6457 (protocol == htons(ETH_P_FCOE) ||
6458 protocol == htons(ETH_P_FIP))) {
6459 #ifdef CONFIG_IXGBE_DCB
6460 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6461 tx_flags &= ~(IXGBE_TX_FLAGS_VLAN_PRIO_MASK
6462 << IXGBE_TX_FLAGS_VLAN_SHIFT);
6463 tx_flags |= ((adapter->fcoe.up << 13)
6464 << IXGBE_TX_FLAGS_VLAN_SHIFT);
6465 }
6466 #endif
6467 /* flag for FCoE offloads */
6468 if (protocol == htons(ETH_P_FCOE))
6469 tx_flags |= IXGBE_TX_FLAGS_FCOE;
6470 }
6471 #endif
6472
6473 /* four things can cause us to need a context descriptor */
6474 if (skb_is_gso(skb) ||
6475 (skb->ip_summed == CHECKSUM_PARTIAL) ||
6476 (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
6477 (tx_flags & IXGBE_TX_FLAGS_FCOE))
6478 count++;
6479
6480 count += TXD_USE_COUNT(skb_headlen(skb));
6481 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
6482 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
6483
6484 if (ixgbe_maybe_stop_tx(tx_ring, count)) {
6485 tx_ring->tx_stats.tx_busy++;
6486 return NETDEV_TX_BUSY;
6487 }
6488
6489 first = tx_ring->next_to_use;
6490 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6491 #ifdef IXGBE_FCOE
6492 /* setup tx offload for FCoE */
6493 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
6494 if (tso < 0) {
6495 dev_kfree_skb_any(skb);
6496 return NETDEV_TX_OK;
6497 }
6498 if (tso)
6499 tx_flags |= IXGBE_TX_FLAGS_FSO;
6500 #endif /* IXGBE_FCOE */
6501 } else {
6502 if (protocol == htons(ETH_P_IP))
6503 tx_flags |= IXGBE_TX_FLAGS_IPV4;
6504 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len,
6505 protocol);
6506 if (tso < 0) {
6507 dev_kfree_skb_any(skb);
6508 return NETDEV_TX_OK;
6509 }
6510
6511 if (tso)
6512 tx_flags |= IXGBE_TX_FLAGS_TSO;
6513 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags,
6514 protocol) &&
6515 (skb->ip_summed == CHECKSUM_PARTIAL))
6516 tx_flags |= IXGBE_TX_FLAGS_CSUM;
6517 }
6518
6519 count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first, hdr_len);
6520 if (count) {
6521 /* add the ATR filter if ATR is on */
6522 if (tx_ring->atr_sample_rate) {
6523 ++tx_ring->atr_count;
6524 if ((tx_ring->atr_count >= tx_ring->atr_sample_rate) &&
6525 test_bit(__IXGBE_TX_FDIR_INIT_DONE,
6526 &tx_ring->state)) {
6527 ixgbe_atr(adapter, skb, tx_ring->queue_index,
6528 tx_flags, protocol);
6529 tx_ring->atr_count = 0;
6530 }
6531 }
6532 txq = netdev_get_tx_queue(netdev, tx_ring->queue_index);
6533 txq->tx_bytes += skb->len;
6534 txq->tx_packets++;
6535 ixgbe_tx_queue(tx_ring, tx_flags, count, skb->len, hdr_len);
6536 ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);
6537
6538 } else {
6539 dev_kfree_skb_any(skb);
6540 tx_ring->tx_buffer_info[first].time_stamp = 0;
6541 tx_ring->next_to_use = first;
6542 }
6543
6544 return NETDEV_TX_OK;
6545 }
6546
6547 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
6548 {
6549 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6550 struct ixgbe_ring *tx_ring;
6551
6552 tx_ring = adapter->tx_ring[skb->queue_mapping];
6553 return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
6554 }
6555
6556 /**
6557 * ixgbe_set_mac - Change the Ethernet Address of the NIC
6558 * @netdev: network interface device structure
6559 * @p: pointer to an address structure
6560 *
6561 * Returns 0 on success, negative on failure
6562 **/
6563 static int ixgbe_set_mac(struct net_device *netdev, void *p)
6564 {
6565 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6566 struct ixgbe_hw *hw = &adapter->hw;
6567 struct sockaddr *addr = p;
6568
6569 if (!is_valid_ether_addr(addr->sa_data))
6570 return -EADDRNOTAVAIL;
6571
6572 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
6573 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
6574
6575 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
6576 IXGBE_RAH_AV);
6577
6578 return 0;
6579 }
6580
6581 static int
6582 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
6583 {
6584 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6585 struct ixgbe_hw *hw = &adapter->hw;
6586 u16 value;
6587 int rc;
6588
6589 if (prtad != hw->phy.mdio.prtad)
6590 return -EINVAL;
6591 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
6592 if (!rc)
6593 rc = value;
6594 return rc;
6595 }
6596
6597 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
6598 u16 addr, u16 value)
6599 {
6600 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6601 struct ixgbe_hw *hw = &adapter->hw;
6602
6603 if (prtad != hw->phy.mdio.prtad)
6604 return -EINVAL;
6605 return hw->phy.ops.write_reg(hw, addr, devad, value);
6606 }
6607
6608 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
6609 {
6610 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6611
6612 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
6613 }
6614
6615 /**
6616 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
6617 * netdev->dev_addrs
6618 * @netdev: network interface device structure
6619 *
6620 * Returns non-zero on failure
6621 **/
6622 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
6623 {
6624 int err = 0;
6625 struct ixgbe_adapter *adapter = netdev_priv(dev);
6626 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6627
6628 if (is_valid_ether_addr(mac->san_addr)) {
6629 rtnl_lock();
6630 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6631 rtnl_unlock();
6632 }
6633 return err;
6634 }
6635
6636 /**
6637 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
6638 * netdev->dev_addrs
6639 * @netdev: network interface device structure
6640 *
6641 * Returns non-zero on failure
6642 **/
6643 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
6644 {
6645 int err = 0;
6646 struct ixgbe_adapter *adapter = netdev_priv(dev);
6647 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6648
6649 if (is_valid_ether_addr(mac->san_addr)) {
6650 rtnl_lock();
6651 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6652 rtnl_unlock();
6653 }
6654 return err;
6655 }
6656
6657 #ifdef CONFIG_NET_POLL_CONTROLLER
6658 /*
6659 * Polling 'interrupt' - used by things like netconsole to send skbs
6660 * without having to re-enable interrupts. It's not called while
6661 * the interrupt routine is executing.
6662 */
6663 static void ixgbe_netpoll(struct net_device *netdev)
6664 {
6665 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6666 int i;
6667
6668 /* if interface is down do nothing */
6669 if (test_bit(__IXGBE_DOWN, &adapter->state))
6670 return;
6671
6672 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
6673 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
6674 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
6675 for (i = 0; i < num_q_vectors; i++) {
6676 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
6677 ixgbe_msix_clean_many(0, q_vector);
6678 }
6679 } else {
6680 ixgbe_intr(adapter->pdev->irq, netdev);
6681 }
6682 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
6683 }
6684 #endif
6685
6686 static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
6687 struct rtnl_link_stats64 *stats)
6688 {
6689 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6690 int i;
6691
6692 /* accurate rx/tx bytes/packets stats */
6693 dev_txq_stats_fold(netdev, stats);
6694 rcu_read_lock();
6695 for (i = 0; i < adapter->num_rx_queues; i++) {
6696 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]);
6697 u64 bytes, packets;
6698 unsigned int start;
6699
6700 if (ring) {
6701 do {
6702 start = u64_stats_fetch_begin_bh(&ring->syncp);
6703 packets = ring->stats.packets;
6704 bytes = ring->stats.bytes;
6705 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
6706 stats->rx_packets += packets;
6707 stats->rx_bytes += bytes;
6708 }
6709 }
6710 rcu_read_unlock();
6711 /* following stats updated by ixgbe_watchdog_task() */
6712 stats->multicast = netdev->stats.multicast;
6713 stats->rx_errors = netdev->stats.rx_errors;
6714 stats->rx_length_errors = netdev->stats.rx_length_errors;
6715 stats->rx_crc_errors = netdev->stats.rx_crc_errors;
6716 stats->rx_missed_errors = netdev->stats.rx_missed_errors;
6717 return stats;
6718 }
6719
6720
6721 static const struct net_device_ops ixgbe_netdev_ops = {
6722 .ndo_open = ixgbe_open,
6723 .ndo_stop = ixgbe_close,
6724 .ndo_start_xmit = ixgbe_xmit_frame,
6725 .ndo_select_queue = ixgbe_select_queue,
6726 .ndo_set_rx_mode = ixgbe_set_rx_mode,
6727 .ndo_set_multicast_list = ixgbe_set_rx_mode,
6728 .ndo_validate_addr = eth_validate_addr,
6729 .ndo_set_mac_address = ixgbe_set_mac,
6730 .ndo_change_mtu = ixgbe_change_mtu,
6731 .ndo_tx_timeout = ixgbe_tx_timeout,
6732 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
6733 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
6734 .ndo_do_ioctl = ixgbe_ioctl,
6735 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
6736 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
6737 .ndo_set_vf_tx_rate = ixgbe_ndo_set_vf_bw,
6738 .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
6739 .ndo_get_stats64 = ixgbe_get_stats64,
6740 #ifdef CONFIG_NET_POLL_CONTROLLER
6741 .ndo_poll_controller = ixgbe_netpoll,
6742 #endif
6743 #ifdef IXGBE_FCOE
6744 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
6745 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
6746 .ndo_fcoe_enable = ixgbe_fcoe_enable,
6747 .ndo_fcoe_disable = ixgbe_fcoe_disable,
6748 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
6749 #endif /* IXGBE_FCOE */
6750 };
6751
6752 static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter,
6753 const struct ixgbe_info *ii)
6754 {
6755 #ifdef CONFIG_PCI_IOV
6756 struct ixgbe_hw *hw = &adapter->hw;
6757 int err;
6758
6759 if (hw->mac.type != ixgbe_mac_82599EB || !max_vfs)
6760 return;
6761
6762 /* The 82599 supports up to 64 VFs per physical function
6763 * but this implementation limits allocation to 63 so that
6764 * basic networking resources are still available to the
6765 * physical function
6766 */
6767 adapter->num_vfs = (max_vfs > 63) ? 63 : max_vfs;
6768 adapter->flags |= IXGBE_FLAG_SRIOV_ENABLED;
6769 err = pci_enable_sriov(adapter->pdev, adapter->num_vfs);
6770 if (err) {
6771 e_err(probe, "Failed to enable PCI sriov: %d\n", err);
6772 goto err_novfs;
6773 }
6774 /* If call to enable VFs succeeded then allocate memory
6775 * for per VF control structures.
6776 */
6777 adapter->vfinfo =
6778 kcalloc(adapter->num_vfs,
6779 sizeof(struct vf_data_storage), GFP_KERNEL);
6780 if (adapter->vfinfo) {
6781 /* Now that we're sure SR-IOV is enabled
6782 * and memory allocated set up the mailbox parameters
6783 */
6784 ixgbe_init_mbx_params_pf(hw);
6785 memcpy(&hw->mbx.ops, ii->mbx_ops,
6786 sizeof(hw->mbx.ops));
6787
6788 /* Disable RSC when in SR-IOV mode */
6789 adapter->flags2 &= ~(IXGBE_FLAG2_RSC_CAPABLE |
6790 IXGBE_FLAG2_RSC_ENABLED);
6791 return;
6792 }
6793
6794 /* Oh oh */
6795 e_err(probe, "Unable to allocate memory for VF Data Storage - "
6796 "SRIOV disabled\n");
6797 pci_disable_sriov(adapter->pdev);
6798
6799 err_novfs:
6800 adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
6801 adapter->num_vfs = 0;
6802 #endif /* CONFIG_PCI_IOV */
6803 }
6804
6805 /**
6806 * ixgbe_probe - Device Initialization Routine
6807 * @pdev: PCI device information struct
6808 * @ent: entry in ixgbe_pci_tbl
6809 *
6810 * Returns 0 on success, negative on failure
6811 *
6812 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
6813 * The OS initialization, configuring of the adapter private structure,
6814 * and a hardware reset occur.
6815 **/
6816 static int __devinit ixgbe_probe(struct pci_dev *pdev,
6817 const struct pci_device_id *ent)
6818 {
6819 struct net_device *netdev;
6820 struct ixgbe_adapter *adapter = NULL;
6821 struct ixgbe_hw *hw;
6822 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
6823 static int cards_found;
6824 int i, err, pci_using_dac;
6825 unsigned int indices = num_possible_cpus();
6826 #ifdef IXGBE_FCOE
6827 u16 device_caps;
6828 #endif
6829 u32 part_num, eec;
6830
6831 /* Catch broken hardware that put the wrong VF device ID in
6832 * the PCIe SR-IOV capability.
6833 */
6834 if (pdev->is_virtfn) {
6835 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
6836 pci_name(pdev), pdev->vendor, pdev->device);
6837 return -EINVAL;
6838 }
6839
6840 err = pci_enable_device_mem(pdev);
6841 if (err)
6842 return err;
6843
6844 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
6845 !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
6846 pci_using_dac = 1;
6847 } else {
6848 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
6849 if (err) {
6850 err = dma_set_coherent_mask(&pdev->dev,
6851 DMA_BIT_MASK(32));
6852 if (err) {
6853 dev_err(&pdev->dev,
6854 "No usable DMA configuration, aborting\n");
6855 goto err_dma;
6856 }
6857 }
6858 pci_using_dac = 0;
6859 }
6860
6861 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
6862 IORESOURCE_MEM), ixgbe_driver_name);
6863 if (err) {
6864 dev_err(&pdev->dev,
6865 "pci_request_selected_regions failed 0x%x\n", err);
6866 goto err_pci_reg;
6867 }
6868
6869 pci_enable_pcie_error_reporting(pdev);
6870
6871 pci_set_master(pdev);
6872 pci_save_state(pdev);
6873
6874 if (ii->mac == ixgbe_mac_82598EB)
6875 indices = min_t(unsigned int, indices, IXGBE_MAX_RSS_INDICES);
6876 else
6877 indices = min_t(unsigned int, indices, IXGBE_MAX_FDIR_INDICES);
6878
6879 indices = max_t(unsigned int, indices, IXGBE_MAX_DCB_INDICES);
6880 #ifdef IXGBE_FCOE
6881 indices += min_t(unsigned int, num_possible_cpus(),
6882 IXGBE_MAX_FCOE_INDICES);
6883 #endif
6884 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
6885 if (!netdev) {
6886 err = -ENOMEM;
6887 goto err_alloc_etherdev;
6888 }
6889
6890 SET_NETDEV_DEV(netdev, &pdev->dev);
6891
6892 adapter = netdev_priv(netdev);
6893 pci_set_drvdata(pdev, adapter);
6894
6895 adapter->netdev = netdev;
6896 adapter->pdev = pdev;
6897 hw = &adapter->hw;
6898 hw->back = adapter;
6899 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
6900
6901 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
6902 pci_resource_len(pdev, 0));
6903 if (!hw->hw_addr) {
6904 err = -EIO;
6905 goto err_ioremap;
6906 }
6907
6908 for (i = 1; i <= 5; i++) {
6909 if (pci_resource_len(pdev, i) == 0)
6910 continue;
6911 }
6912
6913 netdev->netdev_ops = &ixgbe_netdev_ops;
6914 ixgbe_set_ethtool_ops(netdev);
6915 netdev->watchdog_timeo = 5 * HZ;
6916 strcpy(netdev->name, pci_name(pdev));
6917
6918 adapter->bd_number = cards_found;
6919
6920 /* Setup hw api */
6921 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
6922 hw->mac.type = ii->mac;
6923
6924 /* EEPROM */
6925 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
6926 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
6927 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
6928 if (!(eec & (1 << 8)))
6929 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
6930
6931 /* PHY */
6932 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
6933 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
6934 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
6935 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
6936 hw->phy.mdio.mmds = 0;
6937 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
6938 hw->phy.mdio.dev = netdev;
6939 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
6940 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
6941
6942 /* set up this timer and work struct before calling get_invariants
6943 * which might start the timer
6944 */
6945 init_timer(&adapter->sfp_timer);
6946 adapter->sfp_timer.function = ixgbe_sfp_timer;
6947 adapter->sfp_timer.data = (unsigned long) adapter;
6948
6949 INIT_WORK(&adapter->sfp_task, ixgbe_sfp_task);
6950
6951 /* multispeed fiber has its own tasklet, called from GPI SDP1 context */
6952 INIT_WORK(&adapter->multispeed_fiber_task, ixgbe_multispeed_fiber_task);
6953
6954 /* a new SFP+ module arrival, called from GPI SDP2 context */
6955 INIT_WORK(&adapter->sfp_config_module_task,
6956 ixgbe_sfp_config_module_task);
6957
6958 ii->get_invariants(hw);
6959
6960 /* setup the private structure */
6961 err = ixgbe_sw_init(adapter);
6962 if (err)
6963 goto err_sw_init;
6964
6965 /* Make it possible the adapter to be woken up via WOL */
6966 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
6967 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
6968
6969 /*
6970 * If there is a fan on this device and it has failed log the
6971 * failure.
6972 */
6973 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
6974 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
6975 if (esdp & IXGBE_ESDP_SDP1)
6976 e_crit(probe, "Fan has stopped, replace the adapter\n");
6977 }
6978
6979 /* reset_hw fills in the perm_addr as well */
6980 hw->phy.reset_if_overtemp = true;
6981 err = hw->mac.ops.reset_hw(hw);
6982 hw->phy.reset_if_overtemp = false;
6983 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
6984 hw->mac.type == ixgbe_mac_82598EB) {
6985 /*
6986 * Start a kernel thread to watch for a module to arrive.
6987 * Only do this for 82598, since 82599 will generate
6988 * interrupts on module arrival.
6989 */
6990 set_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
6991 mod_timer(&adapter->sfp_timer,
6992 round_jiffies(jiffies + (2 * HZ)));
6993 err = 0;
6994 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
6995 e_dev_err("failed to initialize because an unsupported SFP+ "
6996 "module type was detected.\n");
6997 e_dev_err("Reload the driver after installing a supported "
6998 "module.\n");
6999 goto err_sw_init;
7000 } else if (err) {
7001 e_dev_err("HW Init failed: %d\n", err);
7002 goto err_sw_init;
7003 }
7004
7005 ixgbe_probe_vf(adapter, ii);
7006
7007 netdev->features = NETIF_F_SG |
7008 NETIF_F_IP_CSUM |
7009 NETIF_F_HW_VLAN_TX |
7010 NETIF_F_HW_VLAN_RX |
7011 NETIF_F_HW_VLAN_FILTER;
7012
7013 netdev->features |= NETIF_F_IPV6_CSUM;
7014 netdev->features |= NETIF_F_TSO;
7015 netdev->features |= NETIF_F_TSO6;
7016 netdev->features |= NETIF_F_GRO;
7017
7018 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
7019 netdev->features |= NETIF_F_SCTP_CSUM;
7020
7021 netdev->vlan_features |= NETIF_F_TSO;
7022 netdev->vlan_features |= NETIF_F_TSO6;
7023 netdev->vlan_features |= NETIF_F_IP_CSUM;
7024 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
7025 netdev->vlan_features |= NETIF_F_SG;
7026
7027 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7028 adapter->flags &= ~(IXGBE_FLAG_RSS_ENABLED |
7029 IXGBE_FLAG_DCB_ENABLED);
7030 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
7031 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
7032
7033 #ifdef CONFIG_IXGBE_DCB
7034 netdev->dcbnl_ops = &dcbnl_ops;
7035 #endif
7036
7037 #ifdef IXGBE_FCOE
7038 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
7039 if (hw->mac.ops.get_device_caps) {
7040 hw->mac.ops.get_device_caps(hw, &device_caps);
7041 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
7042 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
7043 }
7044 }
7045 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
7046 netdev->vlan_features |= NETIF_F_FCOE_CRC;
7047 netdev->vlan_features |= NETIF_F_FSO;
7048 netdev->vlan_features |= NETIF_F_FCOE_MTU;
7049 }
7050 #endif /* IXGBE_FCOE */
7051 if (pci_using_dac) {
7052 netdev->features |= NETIF_F_HIGHDMA;
7053 netdev->vlan_features |= NETIF_F_HIGHDMA;
7054 }
7055
7056 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
7057 netdev->features |= NETIF_F_LRO;
7058
7059 /* make sure the EEPROM is good */
7060 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
7061 e_dev_err("The EEPROM Checksum Is Not Valid\n");
7062 err = -EIO;
7063 goto err_eeprom;
7064 }
7065
7066 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
7067 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
7068
7069 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
7070 e_dev_err("invalid MAC address\n");
7071 err = -EIO;
7072 goto err_eeprom;
7073 }
7074
7075 /* power down the optics */
7076 if (hw->phy.multispeed_fiber)
7077 hw->mac.ops.disable_tx_laser(hw);
7078
7079 init_timer(&adapter->watchdog_timer);
7080 adapter->watchdog_timer.function = ixgbe_watchdog;
7081 adapter->watchdog_timer.data = (unsigned long)adapter;
7082
7083 INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
7084 INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
7085
7086 err = ixgbe_init_interrupt_scheme(adapter);
7087 if (err)
7088 goto err_sw_init;
7089
7090 switch (pdev->device) {
7091 case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
7092 /* All except this subdevice support WOL */
7093 if (pdev->subsystem_device ==
7094 IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ) {
7095 adapter->wol = 0;
7096 break;
7097 }
7098 case IXGBE_DEV_ID_82599_KX4:
7099 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
7100 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
7101 break;
7102 default:
7103 adapter->wol = 0;
7104 break;
7105 }
7106 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
7107
7108 /* pick up the PCI bus settings for reporting later */
7109 hw->mac.ops.get_bus_info(hw);
7110
7111 /* print bus type/speed/width info */
7112 e_dev_info("(PCI Express:%s:%s) %pM\n",
7113 (hw->bus.speed == ixgbe_bus_speed_5000 ? "5.0Gb/s" :
7114 hw->bus.speed == ixgbe_bus_speed_2500 ? "2.5Gb/s" :
7115 "Unknown"),
7116 (hw->bus.width == ixgbe_bus_width_pcie_x8 ? "Width x8" :
7117 hw->bus.width == ixgbe_bus_width_pcie_x4 ? "Width x4" :
7118 hw->bus.width == ixgbe_bus_width_pcie_x1 ? "Width x1" :
7119 "Unknown"),
7120 netdev->dev_addr);
7121 ixgbe_read_pba_num_generic(hw, &part_num);
7122 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
7123 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, "
7124 "PBA No: %06x-%03x\n",
7125 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
7126 (part_num >> 8), (part_num & 0xff));
7127 else
7128 e_dev_info("MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
7129 hw->mac.type, hw->phy.type,
7130 (part_num >> 8), (part_num & 0xff));
7131
7132 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
7133 e_dev_warn("PCI-Express bandwidth available for this card is "
7134 "not sufficient for optimal performance.\n");
7135 e_dev_warn("For optimal performance a x8 PCI-Express slot "
7136 "is required.\n");
7137 }
7138
7139 /* save off EEPROM version number */
7140 hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
7141
7142 /* reset the hardware with the new settings */
7143 err = hw->mac.ops.start_hw(hw);
7144
7145 if (err == IXGBE_ERR_EEPROM_VERSION) {
7146 /* We are running on a pre-production device, log a warning */
7147 e_dev_warn("This device is a pre-production adapter/LOM. "
7148 "Please be aware there may be issues associated "
7149 "with your hardware. If you are experiencing "
7150 "problems please contact your Intel or hardware "
7151 "representative who provided you with this "
7152 "hardware.\n");
7153 }
7154 strcpy(netdev->name, "eth%d");
7155 err = register_netdev(netdev);
7156 if (err)
7157 goto err_register;
7158
7159 /* carrier off reporting is important to ethtool even BEFORE open */
7160 netif_carrier_off(netdev);
7161
7162 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
7163 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
7164 INIT_WORK(&adapter->fdir_reinit_task, ixgbe_fdir_reinit_task);
7165
7166 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
7167 INIT_WORK(&adapter->check_overtemp_task,
7168 ixgbe_check_overtemp_task);
7169 #ifdef CONFIG_IXGBE_DCA
7170 if (dca_add_requester(&pdev->dev) == 0) {
7171 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
7172 ixgbe_setup_dca(adapter);
7173 }
7174 #endif
7175 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
7176 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
7177 for (i = 0; i < adapter->num_vfs; i++)
7178 ixgbe_vf_configuration(pdev, (i | 0x10000000));
7179 }
7180
7181 /* add san mac addr to netdev */
7182 ixgbe_add_sanmac_netdev(netdev);
7183
7184 e_dev_info("Intel(R) 10 Gigabit Network Connection\n");
7185 cards_found++;
7186 return 0;
7187
7188 err_register:
7189 ixgbe_release_hw_control(adapter);
7190 ixgbe_clear_interrupt_scheme(adapter);
7191 err_sw_init:
7192 err_eeprom:
7193 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7194 ixgbe_disable_sriov(adapter);
7195 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
7196 del_timer_sync(&adapter->sfp_timer);
7197 cancel_work_sync(&adapter->sfp_task);
7198 cancel_work_sync(&adapter->multispeed_fiber_task);
7199 cancel_work_sync(&adapter->sfp_config_module_task);
7200 iounmap(hw->hw_addr);
7201 err_ioremap:
7202 free_netdev(netdev);
7203 err_alloc_etherdev:
7204 pci_release_selected_regions(pdev,
7205 pci_select_bars(pdev, IORESOURCE_MEM));
7206 err_pci_reg:
7207 err_dma:
7208 pci_disable_device(pdev);
7209 return err;
7210 }
7211
7212 /**
7213 * ixgbe_remove - Device Removal Routine
7214 * @pdev: PCI device information struct
7215 *
7216 * ixgbe_remove is called by the PCI subsystem to alert the driver
7217 * that it should release a PCI device. The could be caused by a
7218 * Hot-Plug event, or because the driver is going to be removed from
7219 * memory.
7220 **/
7221 static void __devexit ixgbe_remove(struct pci_dev *pdev)
7222 {
7223 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7224 struct net_device *netdev = adapter->netdev;
7225
7226 set_bit(__IXGBE_DOWN, &adapter->state);
7227 /* clear the module not found bit to make sure the worker won't
7228 * reschedule
7229 */
7230 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
7231 del_timer_sync(&adapter->watchdog_timer);
7232
7233 del_timer_sync(&adapter->sfp_timer);
7234 cancel_work_sync(&adapter->watchdog_task);
7235 cancel_work_sync(&adapter->sfp_task);
7236 cancel_work_sync(&adapter->multispeed_fiber_task);
7237 cancel_work_sync(&adapter->sfp_config_module_task);
7238 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
7239 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
7240 cancel_work_sync(&adapter->fdir_reinit_task);
7241 flush_scheduled_work();
7242
7243 #ifdef CONFIG_IXGBE_DCA
7244 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
7245 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
7246 dca_remove_requester(&pdev->dev);
7247 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
7248 }
7249
7250 #endif
7251 #ifdef IXGBE_FCOE
7252 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
7253 ixgbe_cleanup_fcoe(adapter);
7254
7255 #endif /* IXGBE_FCOE */
7256
7257 /* remove the added san mac */
7258 ixgbe_del_sanmac_netdev(netdev);
7259
7260 if (netdev->reg_state == NETREG_REGISTERED)
7261 unregister_netdev(netdev);
7262
7263 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7264 ixgbe_disable_sriov(adapter);
7265
7266 ixgbe_clear_interrupt_scheme(adapter);
7267
7268 ixgbe_release_hw_control(adapter);
7269
7270 iounmap(adapter->hw.hw_addr);
7271 pci_release_selected_regions(pdev, pci_select_bars(pdev,
7272 IORESOURCE_MEM));
7273
7274 e_dev_info("complete\n");
7275
7276 free_netdev(netdev);
7277
7278 pci_disable_pcie_error_reporting(pdev);
7279
7280 pci_disable_device(pdev);
7281 }
7282
7283 /**
7284 * ixgbe_io_error_detected - called when PCI error is detected
7285 * @pdev: Pointer to PCI device
7286 * @state: The current pci connection state
7287 *
7288 * This function is called after a PCI bus error affecting
7289 * this device has been detected.
7290 */
7291 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
7292 pci_channel_state_t state)
7293 {
7294 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7295 struct net_device *netdev = adapter->netdev;
7296
7297 netif_device_detach(netdev);
7298
7299 if (state == pci_channel_io_perm_failure)
7300 return PCI_ERS_RESULT_DISCONNECT;
7301
7302 if (netif_running(netdev))
7303 ixgbe_down(adapter);
7304 pci_disable_device(pdev);
7305
7306 /* Request a slot reset. */
7307 return PCI_ERS_RESULT_NEED_RESET;
7308 }
7309
7310 /**
7311 * ixgbe_io_slot_reset - called after the pci bus has been reset.
7312 * @pdev: Pointer to PCI device
7313 *
7314 * Restart the card from scratch, as if from a cold-boot.
7315 */
7316 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
7317 {
7318 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7319 pci_ers_result_t result;
7320 int err;
7321
7322 if (pci_enable_device_mem(pdev)) {
7323 e_err(probe, "Cannot re-enable PCI device after reset.\n");
7324 result = PCI_ERS_RESULT_DISCONNECT;
7325 } else {
7326 pci_set_master(pdev);
7327 pci_restore_state(pdev);
7328 pci_save_state(pdev);
7329
7330 pci_wake_from_d3(pdev, false);
7331
7332 ixgbe_reset(adapter);
7333 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7334 result = PCI_ERS_RESULT_RECOVERED;
7335 }
7336
7337 err = pci_cleanup_aer_uncorrect_error_status(pdev);
7338 if (err) {
7339 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
7340 "failed 0x%0x\n", err);
7341 /* non-fatal, continue */
7342 }
7343
7344 return result;
7345 }
7346
7347 /**
7348 * ixgbe_io_resume - called when traffic can start flowing again.
7349 * @pdev: Pointer to PCI device
7350 *
7351 * This callback is called when the error recovery driver tells us that
7352 * its OK to resume normal operation.
7353 */
7354 static void ixgbe_io_resume(struct pci_dev *pdev)
7355 {
7356 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7357 struct net_device *netdev = adapter->netdev;
7358
7359 if (netif_running(netdev)) {
7360 if (ixgbe_up(adapter)) {
7361 e_info(probe, "ixgbe_up failed after reset\n");
7362 return;
7363 }
7364 }
7365
7366 netif_device_attach(netdev);
7367 }
7368
7369 static struct pci_error_handlers ixgbe_err_handler = {
7370 .error_detected = ixgbe_io_error_detected,
7371 .slot_reset = ixgbe_io_slot_reset,
7372 .resume = ixgbe_io_resume,
7373 };
7374
7375 static struct pci_driver ixgbe_driver = {
7376 .name = ixgbe_driver_name,
7377 .id_table = ixgbe_pci_tbl,
7378 .probe = ixgbe_probe,
7379 .remove = __devexit_p(ixgbe_remove),
7380 #ifdef CONFIG_PM
7381 .suspend = ixgbe_suspend,
7382 .resume = ixgbe_resume,
7383 #endif
7384 .shutdown = ixgbe_shutdown,
7385 .err_handler = &ixgbe_err_handler
7386 };
7387
7388 /**
7389 * ixgbe_init_module - Driver Registration Routine
7390 *
7391 * ixgbe_init_module is the first routine called when the driver is
7392 * loaded. All it does is register with the PCI subsystem.
7393 **/
7394 static int __init ixgbe_init_module(void)
7395 {
7396 int ret;
7397 pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
7398 pr_info("%s\n", ixgbe_copyright);
7399
7400 #ifdef CONFIG_IXGBE_DCA
7401 dca_register_notify(&dca_notifier);
7402 #endif
7403
7404 ret = pci_register_driver(&ixgbe_driver);
7405 return ret;
7406 }
7407
7408 module_init(ixgbe_init_module);
7409
7410 /**
7411 * ixgbe_exit_module - Driver Exit Cleanup Routine
7412 *
7413 * ixgbe_exit_module is called just before the driver is removed
7414 * from memory.
7415 **/
7416 static void __exit ixgbe_exit_module(void)
7417 {
7418 #ifdef CONFIG_IXGBE_DCA
7419 dca_unregister_notify(&dca_notifier);
7420 #endif
7421 pci_unregister_driver(&ixgbe_driver);
7422 rcu_barrier(); /* Wait for completion of call_rcu()'s */
7423 }
7424
7425 #ifdef CONFIG_IXGBE_DCA
7426 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
7427 void *p)
7428 {
7429 int ret_val;
7430
7431 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
7432 __ixgbe_notify_dca);
7433
7434 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
7435 }
7436
7437 #endif /* CONFIG_IXGBE_DCA */
7438
7439 /**
7440 * ixgbe_get_hw_dev return device
7441 * used by hardware layer to print debugging information
7442 **/
7443 struct net_device *ixgbe_get_hw_dev(struct ixgbe_hw *hw)
7444 {
7445 struct ixgbe_adapter *adapter = hw->back;
7446 return adapter->netdev;
7447 }
7448
7449 module_exit(ixgbe_exit_module);
7450
7451 /* ixgbe_main.c */
Linux kernel - Deliverables
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