?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / drivers / net / ethernet / intel / ixgbe / ixgbe_main.c
blob3dc6cef58107f9cb260d4b35be65df8a7652c87d
1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2012 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26 *******************************************************************************/
27
28 #include <linux/types.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/netdevice.h>
32 #include <linux/vmalloc.h>
33 #include <linux/string.h>
34 #include <linux/in.h>
35 #include <linux/interrupt.h>
36 #include <linux/ip.h>
37 #include <linux/tcp.h>
38 #include <linux/sctp.h>
39 #include <linux/pkt_sched.h>
40 #include <linux/ipv6.h>
41 #include <linux/slab.h>
42 #include <net/checksum.h>
43 #include <net/ip6_checksum.h>
44 #include <linux/ethtool.h>
45 #include <linux/if.h>
46 #include <linux/if_vlan.h>
47 #include <linux/prefetch.h>
48 #include <scsi/fc/fc_fcoe.h>
49
50 #include "ixgbe.h"
51 #include "ixgbe_common.h"
52 #include "ixgbe_dcb_82599.h"
53 #include "ixgbe_sriov.h"
54
55 char ixgbe_driver_name[] = "ixgbe";
56 static const char ixgbe_driver_string[] =
57 "Intel(R) 10 Gigabit PCI Express Network Driver";
58 char ixgbe_default_device_descr[] =
59 "Intel(R) 10 Gigabit Network Connection";
60 #define MAJ 3
61 #define MIN 6
62 #define BUILD 7
63 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \
64 __stringify(BUILD) "-k"
65 const char ixgbe_driver_version[] = DRV_VERSION;
66 static const char ixgbe_copyright[] =
67 "Copyright (c) 1999-2012 Intel Corporation.";
68
69 static const struct ixgbe_info *ixgbe_info_tbl[] = {
70 [board_82598] = &ixgbe_82598_info,
71 [board_82599] = &ixgbe_82599_info,
72 [board_X540] = &ixgbe_X540_info,
73 };
74
75 /* ixgbe_pci_tbl - PCI Device ID Table
76 *
77 * Wildcard entries (PCI_ANY_ID) should come last
78 * Last entry must be all 0s
79 *
80 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
81 * Class, Class Mask, private data (not used) }
82 */
83 static DEFINE_PCI_DEVICE_TABLE(ixgbe_pci_tbl) = {
84 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598), board_82598 },
85 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT), board_82598 },
86 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT), board_82598 },
87 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT), board_82598 },
88 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2), board_82598 },
89 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4), board_82598 },
90 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT), board_82598 },
91 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT), board_82598 },
92 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM), board_82598 },
93 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR), board_82598 },
94 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM), board_82598 },
95 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX), board_82598 },
96 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4), board_82599 },
97 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM), board_82599 },
98 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR), board_82599 },
99 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP), board_82599 },
100 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM), board_82599 },
101 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ), board_82599 },
102 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4), board_82599 },
103 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_BACKPLANE_FCOE), board_82599 },
104 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_FCOE), board_82599 },
105 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM), board_82599 },
106 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE), board_82599 },
107 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T), board_X540 },
108 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF2), board_82599 },
109 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_LS), board_82599 },
110 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599EN_SFP), board_82599 },
111 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF_QP), board_82599 },
112 /* required last entry */
113 {0, }
114 };
115 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
116
117 #ifdef CONFIG_IXGBE_DCA
118 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
119 void *p);
120 static struct notifier_block dca_notifier = {
121 .notifier_call = ixgbe_notify_dca,
122 .next = NULL,
123 .priority = 0
124 };
125 #endif
126
127 #ifdef CONFIG_PCI_IOV
128 static unsigned int max_vfs;
129 module_param(max_vfs, uint, 0);
130 MODULE_PARM_DESC(max_vfs,
131 "Maximum number of virtual functions to allocate per physical function");
132 #endif /* CONFIG_PCI_IOV */
133
134 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
135 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
136 MODULE_LICENSE("GPL");
137 MODULE_VERSION(DRV_VERSION);
138
139 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
140
141 static void ixgbe_service_event_schedule(struct ixgbe_adapter *adapter)
142 {
143 if (!test_bit(__IXGBE_DOWN, &adapter->state) &&
144 !test_and_set_bit(__IXGBE_SERVICE_SCHED, &adapter->state))
145 schedule_work(&adapter->service_task);
146 }
147
148 static void ixgbe_service_event_complete(struct ixgbe_adapter *adapter)
149 {
150 BUG_ON(!test_bit(__IXGBE_SERVICE_SCHED, &adapter->state));
151
152 /* flush memory to make sure state is correct before next watchdog */
153 smp_mb__before_clear_bit();
154 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
155 }
156
157 struct ixgbe_reg_info {
158 u32 ofs;
159 char *name;
160 };
161
162 static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {
163
164 /* General Registers */
165 {IXGBE_CTRL, "CTRL"},
166 {IXGBE_STATUS, "STATUS"},
167 {IXGBE_CTRL_EXT, "CTRL_EXT"},
168
169 /* Interrupt Registers */
170 {IXGBE_EICR, "EICR"},
171
172 /* RX Registers */
173 {IXGBE_SRRCTL(0), "SRRCTL"},
174 {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
175 {IXGBE_RDLEN(0), "RDLEN"},
176 {IXGBE_RDH(0), "RDH"},
177 {IXGBE_RDT(0), "RDT"},
178 {IXGBE_RXDCTL(0), "RXDCTL"},
179 {IXGBE_RDBAL(0), "RDBAL"},
180 {IXGBE_RDBAH(0), "RDBAH"},
181
182 /* TX Registers */
183 {IXGBE_TDBAL(0), "TDBAL"},
184 {IXGBE_TDBAH(0), "TDBAH"},
185 {IXGBE_TDLEN(0), "TDLEN"},
186 {IXGBE_TDH(0), "TDH"},
187 {IXGBE_TDT(0), "TDT"},
188 {IXGBE_TXDCTL(0), "TXDCTL"},
189
190 /* List Terminator */
191 {}
192 };
193
194
195 /*
196 * ixgbe_regdump - register printout routine
197 */
198 static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
199 {
200 int i = 0, j = 0;
201 char rname[16];
202 u32 regs[64];
203
204 switch (reginfo->ofs) {
205 case IXGBE_SRRCTL(0):
206 for (i = 0; i < 64; i++)
207 regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
208 break;
209 case IXGBE_DCA_RXCTRL(0):
210 for (i = 0; i < 64; i++)
211 regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
212 break;
213 case IXGBE_RDLEN(0):
214 for (i = 0; i < 64; i++)
215 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
216 break;
217 case IXGBE_RDH(0):
218 for (i = 0; i < 64; i++)
219 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
220 break;
221 case IXGBE_RDT(0):
222 for (i = 0; i < 64; i++)
223 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
224 break;
225 case IXGBE_RXDCTL(0):
226 for (i = 0; i < 64; i++)
227 regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
228 break;
229 case IXGBE_RDBAL(0):
230 for (i = 0; i < 64; i++)
231 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
232 break;
233 case IXGBE_RDBAH(0):
234 for (i = 0; i < 64; i++)
235 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
236 break;
237 case IXGBE_TDBAL(0):
238 for (i = 0; i < 64; i++)
239 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
240 break;
241 case IXGBE_TDBAH(0):
242 for (i = 0; i < 64; i++)
243 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
244 break;
245 case IXGBE_TDLEN(0):
246 for (i = 0; i < 64; i++)
247 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
248 break;
249 case IXGBE_TDH(0):
250 for (i = 0; i < 64; i++)
251 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
252 break;
253 case IXGBE_TDT(0):
254 for (i = 0; i < 64; i++)
255 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
256 break;
257 case IXGBE_TXDCTL(0):
258 for (i = 0; i < 64; i++)
259 regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
260 break;
261 default:
262 pr_info("%-15s %08x\n", reginfo->name,
263 IXGBE_READ_REG(hw, reginfo->ofs));
264 return;
265 }
266
267 for (i = 0; i < 8; i++) {
268 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7);
269 pr_err("%-15s", rname);
270 for (j = 0; j < 8; j++)
271 pr_cont(" %08x", regs[i*8+j]);
272 pr_cont("\n");
273 }
274
275 }
276
277 /*
278 * ixgbe_dump - Print registers, tx-rings and rx-rings
279 */
280 static void ixgbe_dump(struct ixgbe_adapter *adapter)
281 {
282 struct net_device *netdev = adapter->netdev;
283 struct ixgbe_hw *hw = &adapter->hw;
284 struct ixgbe_reg_info *reginfo;
285 int n = 0;
286 struct ixgbe_ring *tx_ring;
287 struct ixgbe_tx_buffer *tx_buffer_info;
288 union ixgbe_adv_tx_desc *tx_desc;
289 struct my_u0 { u64 a; u64 b; } *u0;
290 struct ixgbe_ring *rx_ring;
291 union ixgbe_adv_rx_desc *rx_desc;
292 struct ixgbe_rx_buffer *rx_buffer_info;
293 u32 staterr;
294 int i = 0;
295
296 if (!netif_msg_hw(adapter))
297 return;
298
299 /* Print netdevice Info */
300 if (netdev) {
301 dev_info(&adapter->pdev->dev, "Net device Info\n");
302 pr_info("Device Name state "
303 "trans_start last_rx\n");
304 pr_info("%-15s %016lX %016lX %016lX\n",
305 netdev->name,
306 netdev->state,
307 netdev->trans_start,
308 netdev->last_rx);
309 }
310
311 /* Print Registers */
312 dev_info(&adapter->pdev->dev, "Register Dump\n");
313 pr_info(" Register Name Value\n");
314 for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
315 reginfo->name; reginfo++) {
316 ixgbe_regdump(hw, reginfo);
317 }
318
319 /* Print TX Ring Summary */
320 if (!netdev || !netif_running(netdev))
321 goto exit;
322
323 dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
324 pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n");
325 for (n = 0; n < adapter->num_tx_queues; n++) {
326 tx_ring = adapter->tx_ring[n];
327 tx_buffer_info =
328 &tx_ring->tx_buffer_info[tx_ring->next_to_clean];
329 pr_info(" %5d %5X %5X %016llX %04X %p %016llX\n",
330 n, tx_ring->next_to_use, tx_ring->next_to_clean,
331 (u64)tx_buffer_info->dma,
332 tx_buffer_info->length,
333 tx_buffer_info->next_to_watch,
334 (u64)tx_buffer_info->time_stamp);
335 }
336
337 /* Print TX Rings */
338 if (!netif_msg_tx_done(adapter))
339 goto rx_ring_summary;
340
341 dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
342
343 /* Transmit Descriptor Formats
344 *
345 * Advanced Transmit Descriptor
346 * +--------------------------------------------------------------+
347 * 0 | Buffer Address [63:0] |
348 * +--------------------------------------------------------------+
349 * 8 | PAYLEN | PORTS | IDX | STA | DCMD |DTYP | RSV | DTALEN |
350 * +--------------------------------------------------------------+
351 * 63 46 45 40 39 36 35 32 31 24 23 20 19 0
352 */
353
354 for (n = 0; n < adapter->num_tx_queues; n++) {
355 tx_ring = adapter->tx_ring[n];
356 pr_info("------------------------------------\n");
357 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index);
358 pr_info("------------------------------------\n");
359 pr_info("T [desc] [address 63:0 ] "
360 "[PlPOIdStDDt Ln] [bi->dma ] "
361 "leng ntw timestamp bi->skb\n");
362
363 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
364 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
365 tx_buffer_info = &tx_ring->tx_buffer_info[i];
366 u0 = (struct my_u0 *)tx_desc;
367 pr_info("T [0x%03X] %016llX %016llX %016llX"
368 " %04X %p %016llX %p", i,
369 le64_to_cpu(u0->a),
370 le64_to_cpu(u0->b),
371 (u64)tx_buffer_info->dma,
372 tx_buffer_info->length,
373 tx_buffer_info->next_to_watch,
374 (u64)tx_buffer_info->time_stamp,
375 tx_buffer_info->skb);
376 if (i == tx_ring->next_to_use &&
377 i == tx_ring->next_to_clean)
378 pr_cont(" NTC/U\n");
379 else if (i == tx_ring->next_to_use)
380 pr_cont(" NTU\n");
381 else if (i == tx_ring->next_to_clean)
382 pr_cont(" NTC\n");
383 else
384 pr_cont("\n");
385
386 if (netif_msg_pktdata(adapter) &&
387 tx_buffer_info->dma != 0)
388 print_hex_dump(KERN_INFO, "",
389 DUMP_PREFIX_ADDRESS, 16, 1,
390 phys_to_virt(tx_buffer_info->dma),
391 tx_buffer_info->length, true);
392 }
393 }
394
395 /* Print RX Rings Summary */
396 rx_ring_summary:
397 dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
398 pr_info("Queue [NTU] [NTC]\n");
399 for (n = 0; n < adapter->num_rx_queues; n++) {
400 rx_ring = adapter->rx_ring[n];
401 pr_info("%5d %5X %5X\n",
402 n, rx_ring->next_to_use, rx_ring->next_to_clean);
403 }
404
405 /* Print RX Rings */
406 if (!netif_msg_rx_status(adapter))
407 goto exit;
408
409 dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
410
411 /* Advanced Receive Descriptor (Read) Format
412 * 63 1 0
413 * +-----------------------------------------------------+
414 * 0 | Packet Buffer Address [63:1] |A0/NSE|
415 * +----------------------------------------------+------+
416 * 8 | Header Buffer Address [63:1] | DD |
417 * +-----------------------------------------------------+
418 *
419 *
420 * Advanced Receive Descriptor (Write-Back) Format
421 *
422 * 63 48 47 32 31 30 21 20 16 15 4 3 0
423 * +------------------------------------------------------+
424 * 0 | Packet IP |SPH| HDR_LEN | RSV|Packet| RSS |
425 * | Checksum Ident | | | | Type | Type |
426 * +------------------------------------------------------+
427 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
428 * +------------------------------------------------------+
429 * 63 48 47 32 31 20 19 0
430 */
431 for (n = 0; n < adapter->num_rx_queues; n++) {
432 rx_ring = adapter->rx_ring[n];
433 pr_info("------------------------------------\n");
434 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index);
435 pr_info("------------------------------------\n");
436 pr_info("R [desc] [ PktBuf A0] "
437 "[ HeadBuf DD] [bi->dma ] [bi->skb] "
438 "<-- Adv Rx Read format\n");
439 pr_info("RWB[desc] [PcsmIpSHl PtRs] "
440 "[vl er S cks ln] ---------------- [bi->skb] "
441 "<-- Adv Rx Write-Back format\n");
442
443 for (i = 0; i < rx_ring->count; i++) {
444 rx_buffer_info = &rx_ring->rx_buffer_info[i];
445 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
446 u0 = (struct my_u0 *)rx_desc;
447 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
448 if (staterr & IXGBE_RXD_STAT_DD) {
449 /* Descriptor Done */
450 pr_info("RWB[0x%03X] %016llX "
451 "%016llX ---------------- %p", i,
452 le64_to_cpu(u0->a),
453 le64_to_cpu(u0->b),
454 rx_buffer_info->skb);
455 } else {
456 pr_info("R [0x%03X] %016llX "
457 "%016llX %016llX %p", i,
458 le64_to_cpu(u0->a),
459 le64_to_cpu(u0->b),
460 (u64)rx_buffer_info->dma,
461 rx_buffer_info->skb);
462
463 if (netif_msg_pktdata(adapter)) {
464 print_hex_dump(KERN_INFO, "",
465 DUMP_PREFIX_ADDRESS, 16, 1,
466 phys_to_virt(rx_buffer_info->dma),
467 rx_ring->rx_buf_len, true);
468
469 if (rx_ring->rx_buf_len
470 < IXGBE_RXBUFFER_2K)
471 print_hex_dump(KERN_INFO, "",
472 DUMP_PREFIX_ADDRESS, 16, 1,
473 phys_to_virt(
474 rx_buffer_info->page_dma +
475 rx_buffer_info->page_offset
476 ),
477 PAGE_SIZE/2, true);
478 }
479 }
480
481 if (i == rx_ring->next_to_use)
482 pr_cont(" NTU\n");
483 else if (i == rx_ring->next_to_clean)
484 pr_cont(" NTC\n");
485 else
486 pr_cont("\n");
487
488 }
489 }
490
491 exit:
492 return;
493 }
494
495 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
496 {
497 u32 ctrl_ext;
498
499 /* Let firmware take over control of h/w */
500 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
501 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
502 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
503 }
504
505 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
506 {
507 u32 ctrl_ext;
508
509 /* Let firmware know the driver has taken over */
510 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
511 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
512 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
513 }
514
515 /*
516 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
517 * @adapter: pointer to adapter struct
518 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
519 * @queue: queue to map the corresponding interrupt to
520 * @msix_vector: the vector to map to the corresponding queue
521 *
522 */
523 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
524 u8 queue, u8 msix_vector)
525 {
526 u32 ivar, index;
527 struct ixgbe_hw *hw = &adapter->hw;
528 switch (hw->mac.type) {
529 case ixgbe_mac_82598EB:
530 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
531 if (direction == -1)
532 direction = 0;
533 index = (((direction * 64) + queue) >> 2) & 0x1F;
534 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
535 ivar &= ~(0xFF << (8 * (queue & 0x3)));
536 ivar |= (msix_vector << (8 * (queue & 0x3)));
537 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
538 break;
539 case ixgbe_mac_82599EB:
540 case ixgbe_mac_X540:
541 if (direction == -1) {
542 /* other causes */
543 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
544 index = ((queue & 1) * 8);
545 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
546 ivar &= ~(0xFF << index);
547 ivar |= (msix_vector << index);
548 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
549 break;
550 } else {
551 /* tx or rx causes */
552 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
553 index = ((16 * (queue & 1)) + (8 * direction));
554 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
555 ivar &= ~(0xFF << index);
556 ivar |= (msix_vector << index);
557 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
558 break;
559 }
560 default:
561 break;
562 }
563 }
564
565 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
566 u64 qmask)
567 {
568 u32 mask;
569
570 switch (adapter->hw.mac.type) {
571 case ixgbe_mac_82598EB:
572 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
573 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
574 break;
575 case ixgbe_mac_82599EB:
576 case ixgbe_mac_X540:
577 mask = (qmask & 0xFFFFFFFF);
578 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
579 mask = (qmask >> 32);
580 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
581 break;
582 default:
583 break;
584 }
585 }
586
587 static inline void ixgbe_unmap_tx_resource(struct ixgbe_ring *ring,
588 struct ixgbe_tx_buffer *tx_buffer)
589 {
590 if (tx_buffer->dma) {
591 if (tx_buffer->tx_flags & IXGBE_TX_FLAGS_MAPPED_AS_PAGE)
592 dma_unmap_page(ring->dev,
593 tx_buffer->dma,
594 tx_buffer->length,
595 DMA_TO_DEVICE);
596 else
597 dma_unmap_single(ring->dev,
598 tx_buffer->dma,
599 tx_buffer->length,
600 DMA_TO_DEVICE);
601 }
602 tx_buffer->dma = 0;
603 }
604
605 void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *tx_ring,
606 struct ixgbe_tx_buffer *tx_buffer_info)
607 {
608 ixgbe_unmap_tx_resource(tx_ring, tx_buffer_info);
609 if (tx_buffer_info->skb)
610 dev_kfree_skb_any(tx_buffer_info->skb);
611 tx_buffer_info->skb = NULL;
612 /* tx_buffer_info must be completely set up in the transmit path */
613 }
614
615 static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter)
616 {
617 struct ixgbe_hw *hw = &adapter->hw;
618 struct ixgbe_hw_stats *hwstats = &adapter->stats;
619 u32 data = 0;
620 u32 xoff[8] = {0};
621 int i;
622
623 if ((hw->fc.current_mode == ixgbe_fc_full) ||
624 (hw->fc.current_mode == ixgbe_fc_rx_pause)) {
625 switch (hw->mac.type) {
626 case ixgbe_mac_82598EB:
627 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
628 break;
629 default:
630 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
631 }
632 hwstats->lxoffrxc += data;
633
634 /* refill credits (no tx hang) if we received xoff */
635 if (!data)
636 return;
637
638 for (i = 0; i < adapter->num_tx_queues; i++)
639 clear_bit(__IXGBE_HANG_CHECK_ARMED,
640 &adapter->tx_ring[i]->state);
641 return;
642 } else if (!(adapter->dcb_cfg.pfc_mode_enable))
643 return;
644
645 /* update stats for each tc, only valid with PFC enabled */
646 for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) {
647 switch (hw->mac.type) {
648 case ixgbe_mac_82598EB:
649 xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
650 break;
651 default:
652 xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
653 }
654 hwstats->pxoffrxc[i] += xoff[i];
655 }
656
657 /* disarm tx queues that have received xoff frames */
658 for (i = 0; i < adapter->num_tx_queues; i++) {
659 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
660 u8 tc = tx_ring->dcb_tc;
661
662 if (xoff[tc])
663 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
664 }
665 }
666
667 static u64 ixgbe_get_tx_completed(struct ixgbe_ring *ring)
668 {
669 return ring->tx_stats.completed;
670 }
671
672 static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring)
673 {
674 struct ixgbe_adapter *adapter = netdev_priv(ring->netdev);
675 struct ixgbe_hw *hw = &adapter->hw;
676
677 u32 head = IXGBE_READ_REG(hw, IXGBE_TDH(ring->reg_idx));
678 u32 tail = IXGBE_READ_REG(hw, IXGBE_TDT(ring->reg_idx));
679
680 if (head != tail)
681 return (head < tail) ?
682 tail - head : (tail + ring->count - head);
683
684 return 0;
685 }
686
687 static inline bool ixgbe_check_tx_hang(struct ixgbe_ring *tx_ring)
688 {
689 u32 tx_done = ixgbe_get_tx_completed(tx_ring);
690 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
691 u32 tx_pending = ixgbe_get_tx_pending(tx_ring);
692 bool ret = false;
693
694 clear_check_for_tx_hang(tx_ring);
695
696 /*
697 * Check for a hung queue, but be thorough. This verifies
698 * that a transmit has been completed since the previous
699 * check AND there is at least one packet pending. The
700 * ARMED bit is set to indicate a potential hang. The
701 * bit is cleared if a pause frame is received to remove
702 * false hang detection due to PFC or 802.3x frames. By
703 * requiring this to fail twice we avoid races with
704 * pfc clearing the ARMED bit and conditions where we
705 * run the check_tx_hang logic with a transmit completion
706 * pending but without time to complete it yet.
707 */
708 if ((tx_done_old == tx_done) && tx_pending) {
709 /* make sure it is true for two checks in a row */
710 ret = test_and_set_bit(__IXGBE_HANG_CHECK_ARMED,
711 &tx_ring->state);
712 } else {
713 /* update completed stats and continue */
714 tx_ring->tx_stats.tx_done_old = tx_done;
715 /* reset the countdown */
716 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
717 }
718
719 return ret;
720 }
721
722 /**
723 * ixgbe_tx_timeout_reset - initiate reset due to Tx timeout
724 * @adapter: driver private struct
725 **/
726 static void ixgbe_tx_timeout_reset(struct ixgbe_adapter *adapter)
727 {
728
729 /* Do the reset outside of interrupt context */
730 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
731 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
732 ixgbe_service_event_schedule(adapter);
733 }
734 }
735
736 /**
737 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
738 * @q_vector: structure containing interrupt and ring information
739 * @tx_ring: tx ring to clean
740 **/
741 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
742 struct ixgbe_ring *tx_ring)
743 {
744 struct ixgbe_adapter *adapter = q_vector->adapter;
745 struct ixgbe_tx_buffer *tx_buffer;
746 union ixgbe_adv_tx_desc *tx_desc;
747 unsigned int total_bytes = 0, total_packets = 0;
748 unsigned int budget = q_vector->tx.work_limit;
749 u16 i = tx_ring->next_to_clean;
750
751 tx_buffer = &tx_ring->tx_buffer_info[i];
752 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
753
754 for (; budget; budget--) {
755 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
756
757 /* if next_to_watch is not set then there is no work pending */
758 if (!eop_desc)
759 break;
760
761 /* if DD is not set pending work has not been completed */
762 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
763 break;
764
765 /* count the packet as being completed */
766 tx_ring->tx_stats.completed++;
767
768 /* clear next_to_watch to prevent false hangs */
769 tx_buffer->next_to_watch = NULL;
770
771 /* prevent any other reads prior to eop_desc being verified */
772 rmb();
773
774 do {
775 ixgbe_unmap_tx_resource(tx_ring, tx_buffer);
776 tx_desc->wb.status = 0;
777 if (likely(tx_desc == eop_desc)) {
778 eop_desc = NULL;
779 dev_kfree_skb_any(tx_buffer->skb);
780 tx_buffer->skb = NULL;
781
782 total_bytes += tx_buffer->bytecount;
783 total_packets += tx_buffer->gso_segs;
784 }
785
786 tx_buffer++;
787 tx_desc++;
788 i++;
789 if (unlikely(i == tx_ring->count)) {
790 i = 0;
791
792 tx_buffer = tx_ring->tx_buffer_info;
793 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, 0);
794 }
795
796 } while (eop_desc);
797 }
798
799 tx_ring->next_to_clean = i;
800 u64_stats_update_begin(&tx_ring->syncp);
801 tx_ring->stats.bytes += total_bytes;
802 tx_ring->stats.packets += total_packets;
803 u64_stats_update_end(&tx_ring->syncp);
804 q_vector->tx.total_bytes += total_bytes;
805 q_vector->tx.total_packets += total_packets;
806
807 if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring)) {
808 /* schedule immediate reset if we believe we hung */
809 struct ixgbe_hw *hw = &adapter->hw;
810 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
811 e_err(drv, "Detected Tx Unit Hang\n"
812 " Tx Queue <%d>\n"
813 " TDH, TDT <%x>, <%x>\n"
814 " next_to_use <%x>\n"
815 " next_to_clean <%x>\n"
816 "tx_buffer_info[next_to_clean]\n"
817 " time_stamp <%lx>\n"
818 " jiffies <%lx>\n",
819 tx_ring->queue_index,
820 IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)),
821 IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)),
822 tx_ring->next_to_use, i,
823 tx_ring->tx_buffer_info[i].time_stamp, jiffies);
824
825 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
826
827 e_info(probe,
828 "tx hang %d detected on queue %d, resetting adapter\n",
829 adapter->tx_timeout_count + 1, tx_ring->queue_index);
830
831 /* schedule immediate reset if we believe we hung */
832 ixgbe_tx_timeout_reset(adapter);
833
834 /* the adapter is about to reset, no point in enabling stuff */
835 return true;
836 }
837
838 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
839 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
840 (ixgbe_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
841 /* Make sure that anybody stopping the queue after this
842 * sees the new next_to_clean.
843 */
844 smp_mb();
845 if (__netif_subqueue_stopped(tx_ring->netdev, tx_ring->queue_index) &&
846 !test_bit(__IXGBE_DOWN, &adapter->state)) {
847 netif_wake_subqueue(tx_ring->netdev, tx_ring->queue_index);
848 ++tx_ring->tx_stats.restart_queue;
849 }
850 }
851
852 return !!budget;
853 }
854
855 #ifdef CONFIG_IXGBE_DCA
856 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
857 struct ixgbe_ring *rx_ring,
858 int cpu)
859 {
860 struct ixgbe_hw *hw = &adapter->hw;
861 u32 rxctrl;
862 u8 reg_idx = rx_ring->reg_idx;
863
864 rxctrl = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(reg_idx));
865 switch (hw->mac.type) {
866 case ixgbe_mac_82598EB:
867 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
868 rxctrl |= dca3_get_tag(rx_ring->dev, cpu);
869 break;
870 case ixgbe_mac_82599EB:
871 case ixgbe_mac_X540:
872 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
873 rxctrl |= (dca3_get_tag(rx_ring->dev, cpu) <<
874 IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
875 break;
876 default:
877 break;
878 }
879 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
880 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
881 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
882 IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl);
883 }
884
885 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
886 struct ixgbe_ring *tx_ring,
887 int cpu)
888 {
889 struct ixgbe_hw *hw = &adapter->hw;
890 u32 txctrl;
891 u8 reg_idx = tx_ring->reg_idx;
892
893 switch (hw->mac.type) {
894 case ixgbe_mac_82598EB:
895 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(reg_idx));
896 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
897 txctrl |= dca3_get_tag(tx_ring->dev, cpu);
898 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
899 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(reg_idx), txctrl);
900 break;
901 case ixgbe_mac_82599EB:
902 case ixgbe_mac_X540:
903 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(reg_idx));
904 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
905 txctrl |= (dca3_get_tag(tx_ring->dev, cpu) <<
906 IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
907 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
908 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(reg_idx), txctrl);
909 break;
910 default:
911 break;
912 }
913 }
914
915 static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
916 {
917 struct ixgbe_adapter *adapter = q_vector->adapter;
918 struct ixgbe_ring *ring;
919 int cpu = get_cpu();
920
921 if (q_vector->cpu == cpu)
922 goto out_no_update;
923
924 for (ring = q_vector->tx.ring; ring != NULL; ring = ring->next)
925 ixgbe_update_tx_dca(adapter, ring, cpu);
926
927 for (ring = q_vector->rx.ring; ring != NULL; ring = ring->next)
928 ixgbe_update_rx_dca(adapter, ring, cpu);
929
930 q_vector->cpu = cpu;
931 out_no_update:
932 put_cpu();
933 }
934
935 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
936 {
937 int num_q_vectors;
938 int i;
939
940 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
941 return;
942
943 /* always use CB2 mode, difference is masked in the CB driver */
944 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
945
946 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
947 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
948 else
949 num_q_vectors = 1;
950
951 for (i = 0; i < num_q_vectors; i++) {
952 adapter->q_vector[i]->cpu = -1;
953 ixgbe_update_dca(adapter->q_vector[i]);
954 }
955 }
956
957 static int __ixgbe_notify_dca(struct device *dev, void *data)
958 {
959 struct ixgbe_adapter *adapter = dev_get_drvdata(dev);
960 unsigned long event = *(unsigned long *)data;
961
962 if (!(adapter->flags & IXGBE_FLAG_DCA_CAPABLE))
963 return 0;
964
965 switch (event) {
966 case DCA_PROVIDER_ADD:
967 /* if we're already enabled, don't do it again */
968 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
969 break;
970 if (dca_add_requester(dev) == 0) {
971 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
972 ixgbe_setup_dca(adapter);
973 break;
974 }
975 /* Fall Through since DCA is disabled. */
976 case DCA_PROVIDER_REMOVE:
977 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
978 dca_remove_requester(dev);
979 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
980 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
981 }
982 break;
983 }
984
985 return 0;
986 }
987 #endif /* CONFIG_IXGBE_DCA */
988
989 static inline void ixgbe_rx_hash(union ixgbe_adv_rx_desc *rx_desc,
990 struct sk_buff *skb)
991 {
992 skb->rxhash = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
993 }
994
995 /**
996 * ixgbe_rx_is_fcoe - check the rx desc for incoming pkt type
997 * @adapter: address of board private structure
998 * @rx_desc: advanced rx descriptor
999 *
1000 * Returns : true if it is FCoE pkt
1001 */
1002 static inline bool ixgbe_rx_is_fcoe(struct ixgbe_adapter *adapter,
1003 union ixgbe_adv_rx_desc *rx_desc)
1004 {
1005 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1006
1007 return (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
1008 ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_ETQF_MASK)) ==
1009 (cpu_to_le16(IXGBE_ETQF_FILTER_FCOE <<
1010 IXGBE_RXDADV_PKTTYPE_ETQF_SHIFT)));
1011 }
1012
1013 /**
1014 * ixgbe_receive_skb - Send a completed packet up the stack
1015 * @adapter: board private structure
1016 * @skb: packet to send up
1017 * @status: hardware indication of status of receive
1018 * @rx_ring: rx descriptor ring (for a specific queue) to setup
1019 * @rx_desc: rx descriptor
1020 **/
1021 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
1022 struct sk_buff *skb, u8 status,
1023 struct ixgbe_ring *ring,
1024 union ixgbe_adv_rx_desc *rx_desc)
1025 {
1026 struct ixgbe_adapter *adapter = q_vector->adapter;
1027 struct napi_struct *napi = &q_vector->napi;
1028 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
1029 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
1030
1031 if (is_vlan && (tag & VLAN_VID_MASK))
1032 __vlan_hwaccel_put_tag(skb, tag);
1033
1034 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
1035 napi_gro_receive(napi, skb);
1036 else
1037 netif_rx(skb);
1038 }
1039
1040 /**
1041 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
1042 * @adapter: address of board private structure
1043 * @status_err: hardware indication of status of receive
1044 * @skb: skb currently being received and modified
1045 * @status_err: status error value of last descriptor in packet
1046 **/
1047 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
1048 union ixgbe_adv_rx_desc *rx_desc,
1049 struct sk_buff *skb,
1050 u32 status_err)
1051 {
1052 skb->ip_summed = CHECKSUM_NONE;
1053
1054 /* Rx csum disabled */
1055 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
1056 return;
1057
1058 /* if IP and error */
1059 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
1060 (status_err & IXGBE_RXDADV_ERR_IPE)) {
1061 adapter->hw_csum_rx_error++;
1062 return;
1063 }
1064
1065 if (!(status_err & IXGBE_RXD_STAT_L4CS))
1066 return;
1067
1068 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
1069 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1070
1071 /*
1072 * 82599 errata, UDP frames with a 0 checksum can be marked as
1073 * checksum errors.
1074 */
1075 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
1076 (adapter->hw.mac.type == ixgbe_mac_82599EB))
1077 return;
1078
1079 adapter->hw_csum_rx_error++;
1080 return;
1081 }
1082
1083 /* It must be a TCP or UDP packet with a valid checksum */
1084 skb->ip_summed = CHECKSUM_UNNECESSARY;
1085 }
1086
1087 static inline void ixgbe_release_rx_desc(struct ixgbe_ring *rx_ring, u32 val)
1088 {
1089 /*
1090 * Force memory writes to complete before letting h/w
1091 * know there are new descriptors to fetch. (Only
1092 * applicable for weak-ordered memory model archs,
1093 * such as IA-64).
1094 */
1095 wmb();
1096 writel(val, rx_ring->tail);
1097 }
1098
1099 /**
1100 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
1101 * @rx_ring: ring to place buffers on
1102 * @cleaned_count: number of buffers to replace
1103 **/
1104 void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count)
1105 {
1106 union ixgbe_adv_rx_desc *rx_desc;
1107 struct ixgbe_rx_buffer *bi;
1108 struct sk_buff *skb;
1109 u16 i = rx_ring->next_to_use;
1110
1111 /* do nothing if no valid netdev defined */
1112 if (!rx_ring->netdev)
1113 return;
1114
1115 while (cleaned_count--) {
1116 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1117 bi = &rx_ring->rx_buffer_info[i];
1118 skb = bi->skb;
1119
1120 if (!skb) {
1121 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
1122 rx_ring->rx_buf_len);
1123 if (!skb) {
1124 rx_ring->rx_stats.alloc_rx_buff_failed++;
1125 goto no_buffers;
1126 }
1127 /* initialize queue mapping */
1128 skb_record_rx_queue(skb, rx_ring->queue_index);
1129 bi->skb = skb;
1130 }
1131
1132 if (!bi->dma) {
1133 bi->dma = dma_map_single(rx_ring->dev,
1134 skb->data,
1135 rx_ring->rx_buf_len,
1136 DMA_FROM_DEVICE);
1137 if (dma_mapping_error(rx_ring->dev, bi->dma)) {
1138 rx_ring->rx_stats.alloc_rx_buff_failed++;
1139 bi->dma = 0;
1140 goto no_buffers;
1141 }
1142 }
1143
1144 if (ring_is_ps_enabled(rx_ring)) {
1145 if (!bi->page) {
1146 bi->page = alloc_page(GFP_ATOMIC | __GFP_COLD);
1147 if (!bi->page) {
1148 rx_ring->rx_stats.alloc_rx_page_failed++;
1149 goto no_buffers;
1150 }
1151 }
1152
1153 if (!bi->page_dma) {
1154 /* use a half page if we're re-using */
1155 bi->page_offset ^= PAGE_SIZE / 2;
1156 bi->page_dma = dma_map_page(rx_ring->dev,
1157 bi->page,
1158 bi->page_offset,
1159 PAGE_SIZE / 2,
1160 DMA_FROM_DEVICE);
1161 if (dma_mapping_error(rx_ring->dev,
1162 bi->page_dma)) {
1163 rx_ring->rx_stats.alloc_rx_page_failed++;
1164 bi->page_dma = 0;
1165 goto no_buffers;
1166 }
1167 }
1168
1169 /* Refresh the desc even if buffer_addrs didn't change
1170 * because each write-back erases this info. */
1171 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
1172 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
1173 } else {
1174 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
1175 rx_desc->read.hdr_addr = 0;
1176 }
1177
1178 i++;
1179 if (i == rx_ring->count)
1180 i = 0;
1181 }
1182
1183 no_buffers:
1184 if (rx_ring->next_to_use != i) {
1185 rx_ring->next_to_use = i;
1186 ixgbe_release_rx_desc(rx_ring, i);
1187 }
1188 }
1189
1190 static inline u16 ixgbe_get_hlen(union ixgbe_adv_rx_desc *rx_desc)
1191 {
1192 /* HW will not DMA in data larger than the given buffer, even if it
1193 * parses the (NFS, of course) header to be larger. In that case, it
1194 * fills the header buffer and spills the rest into the page.
1195 */
1196 u16 hdr_info = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info);
1197 u16 hlen = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
1198 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
1199 if (hlen > IXGBE_RX_HDR_SIZE)
1200 hlen = IXGBE_RX_HDR_SIZE;
1201 return hlen;
1202 }
1203
1204 /**
1205 * ixgbe_transform_rsc_queue - change rsc queue into a full packet
1206 * @skb: pointer to the last skb in the rsc queue
1207 *
1208 * This function changes a queue full of hw rsc buffers into a completed
1209 * packet. It uses the ->prev pointers to find the first packet and then
1210 * turns it into the frag list owner.
1211 **/
1212 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb)
1213 {
1214 unsigned int frag_list_size = 0;
1215 unsigned int skb_cnt = 1;
1216
1217 while (skb->prev) {
1218 struct sk_buff *prev = skb->prev;
1219 frag_list_size += skb->len;
1220 skb->prev = NULL;
1221 skb = prev;
1222 skb_cnt++;
1223 }
1224
1225 skb_shinfo(skb)->frag_list = skb->next;
1226 skb->next = NULL;
1227 skb->len += frag_list_size;
1228 skb->data_len += frag_list_size;
1229 skb->truesize += frag_list_size;
1230 IXGBE_RSC_CB(skb)->skb_cnt = skb_cnt;
1231
1232 return skb;
1233 }
1234
1235 static inline bool ixgbe_get_rsc_state(union ixgbe_adv_rx_desc *rx_desc)
1236 {
1237 return !!(le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
1238 IXGBE_RXDADV_RSCCNT_MASK);
1239 }
1240
1241 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
1242 struct ixgbe_ring *rx_ring,
1243 int budget)
1244 {
1245 struct ixgbe_adapter *adapter = q_vector->adapter;
1246 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
1247 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
1248 struct sk_buff *skb;
1249 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1250 const int current_node = numa_node_id();
1251 #ifdef IXGBE_FCOE
1252 int ddp_bytes = 0;
1253 #endif /* IXGBE_FCOE */
1254 u32 staterr;
1255 u16 i;
1256 u16 cleaned_count = 0;
1257 bool pkt_is_rsc = false;
1258
1259 i = rx_ring->next_to_clean;
1260 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1261 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1262
1263 while (staterr & IXGBE_RXD_STAT_DD) {
1264 u32 upper_len = 0;
1265
1266 rmb(); /* read descriptor and rx_buffer_info after status DD */
1267
1268 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1269
1270 skb = rx_buffer_info->skb;
1271 rx_buffer_info->skb = NULL;
1272 prefetch(skb->data);
1273
1274 if (ring_is_rsc_enabled(rx_ring))
1275 pkt_is_rsc = ixgbe_get_rsc_state(rx_desc);
1276
1277 /* linear means we are building an skb from multiple pages */
1278 if (!skb_is_nonlinear(skb)) {
1279 u16 hlen;
1280 if (pkt_is_rsc &&
1281 !(staterr & IXGBE_RXD_STAT_EOP) &&
1282 !skb->prev) {
1283 /*
1284 * When HWRSC is enabled, delay unmapping
1285 * of the first packet. It carries the
1286 * header information, HW may still
1287 * access the header after the writeback.
1288 * Only unmap it when EOP is reached
1289 */
1290 IXGBE_RSC_CB(skb)->delay_unmap = true;
1291 IXGBE_RSC_CB(skb)->dma = rx_buffer_info->dma;
1292 } else {
1293 dma_unmap_single(rx_ring->dev,
1294 rx_buffer_info->dma,
1295 rx_ring->rx_buf_len,
1296 DMA_FROM_DEVICE);
1297 }
1298 rx_buffer_info->dma = 0;
1299
1300 if (ring_is_ps_enabled(rx_ring)) {
1301 hlen = ixgbe_get_hlen(rx_desc);
1302 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
1303 } else {
1304 hlen = le16_to_cpu(rx_desc->wb.upper.length);
1305 }
1306
1307 skb_put(skb, hlen);
1308 } else {
1309 /* assume packet split since header is unmapped */
1310 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
1311 }
1312
1313 if (upper_len) {
1314 dma_unmap_page(rx_ring->dev,
1315 rx_buffer_info->page_dma,
1316 PAGE_SIZE / 2,
1317 DMA_FROM_DEVICE);
1318 rx_buffer_info->page_dma = 0;
1319 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
1320 rx_buffer_info->page,
1321 rx_buffer_info->page_offset,
1322 upper_len);
1323
1324 if ((page_count(rx_buffer_info->page) == 1) &&
1325 (page_to_nid(rx_buffer_info->page) == current_node))
1326 get_page(rx_buffer_info->page);
1327 else
1328 rx_buffer_info->page = NULL;
1329
1330 skb->len += upper_len;
1331 skb->data_len += upper_len;
1332 skb->truesize += PAGE_SIZE / 2;
1333 }
1334
1335 i++;
1336 if (i == rx_ring->count)
1337 i = 0;
1338
1339 next_rxd = IXGBE_RX_DESC_ADV(rx_ring, i);
1340 prefetch(next_rxd);
1341 cleaned_count++;
1342
1343 if (pkt_is_rsc) {
1344 u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
1345 IXGBE_RXDADV_NEXTP_SHIFT;
1346 next_buffer = &rx_ring->rx_buffer_info[nextp];
1347 } else {
1348 next_buffer = &rx_ring->rx_buffer_info[i];
1349 }
1350
1351 if (!(staterr & IXGBE_RXD_STAT_EOP)) {
1352 if (ring_is_ps_enabled(rx_ring)) {
1353 rx_buffer_info->skb = next_buffer->skb;
1354 rx_buffer_info->dma = next_buffer->dma;
1355 next_buffer->skb = skb;
1356 next_buffer->dma = 0;
1357 } else {
1358 skb->next = next_buffer->skb;
1359 skb->next->prev = skb;
1360 }
1361 rx_ring->rx_stats.non_eop_descs++;
1362 goto next_desc;
1363 }
1364
1365 if (skb->prev) {
1366 skb = ixgbe_transform_rsc_queue(skb);
1367 /* if we got here without RSC the packet is invalid */
1368 if (!pkt_is_rsc) {
1369 __pskb_trim(skb, 0);
1370 rx_buffer_info->skb = skb;
1371 goto next_desc;
1372 }
1373 }
1374
1375 if (ring_is_rsc_enabled(rx_ring)) {
1376 if (IXGBE_RSC_CB(skb)->delay_unmap) {
1377 dma_unmap_single(rx_ring->dev,
1378 IXGBE_RSC_CB(skb)->dma,
1379 rx_ring->rx_buf_len,
1380 DMA_FROM_DEVICE);
1381 IXGBE_RSC_CB(skb)->dma = 0;
1382 IXGBE_RSC_CB(skb)->delay_unmap = false;
1383 }
1384 }
1385 if (pkt_is_rsc) {
1386 if (ring_is_ps_enabled(rx_ring))
1387 rx_ring->rx_stats.rsc_count +=
1388 skb_shinfo(skb)->nr_frags;
1389 else
1390 rx_ring->rx_stats.rsc_count +=
1391 IXGBE_RSC_CB(skb)->skb_cnt;
1392 rx_ring->rx_stats.rsc_flush++;
1393 }
1394
1395 /* ERR_MASK will only have valid bits if EOP set */
1396 if (unlikely(staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK)) {
1397 dev_kfree_skb_any(skb);
1398 goto next_desc;
1399 }
1400
1401 ixgbe_rx_checksum(adapter, rx_desc, skb, staterr);
1402 if (adapter->netdev->features & NETIF_F_RXHASH)
1403 ixgbe_rx_hash(rx_desc, skb);
1404
1405 /* probably a little skewed due to removing CRC */
1406 total_rx_bytes += skb->len;
1407 total_rx_packets++;
1408
1409 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
1410 #ifdef IXGBE_FCOE
1411 /* if ddp, not passing to ULD unless for FCP_RSP or error */
1412 if (ixgbe_rx_is_fcoe(adapter, rx_desc)) {
1413 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb,
1414 staterr);
1415 if (!ddp_bytes) {
1416 dev_kfree_skb_any(skb);
1417 goto next_desc;
1418 }
1419 }
1420 #endif /* IXGBE_FCOE */
1421 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
1422
1423 budget--;
1424 next_desc:
1425 rx_desc->wb.upper.status_error = 0;
1426
1427 if (!budget)
1428 break;
1429
1430 /* return some buffers to hardware, one at a time is too slow */
1431 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
1432 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1433 cleaned_count = 0;
1434 }
1435
1436 /* use prefetched values */
1437 rx_desc = next_rxd;
1438 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1439 }
1440
1441 rx_ring->next_to_clean = i;
1442 cleaned_count = ixgbe_desc_unused(rx_ring);
1443
1444 if (cleaned_count)
1445 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1446
1447 #ifdef IXGBE_FCOE
1448 /* include DDPed FCoE data */
1449 if (ddp_bytes > 0) {
1450 unsigned int mss;
1451
1452 mss = rx_ring->netdev->mtu - sizeof(struct fcoe_hdr) -
1453 sizeof(struct fc_frame_header) -
1454 sizeof(struct fcoe_crc_eof);
1455 if (mss > 512)
1456 mss &= ~511;
1457 total_rx_bytes += ddp_bytes;
1458 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
1459 }
1460 #endif /* IXGBE_FCOE */
1461
1462 u64_stats_update_begin(&rx_ring->syncp);
1463 rx_ring->stats.packets += total_rx_packets;
1464 rx_ring->stats.bytes += total_rx_bytes;
1465 u64_stats_update_end(&rx_ring->syncp);
1466 q_vector->rx.total_packets += total_rx_packets;
1467 q_vector->rx.total_bytes += total_rx_bytes;
1468
1469 return !!budget;
1470 }
1471
1472 /**
1473 * ixgbe_configure_msix - Configure MSI-X hardware
1474 * @adapter: board private structure
1475 *
1476 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
1477 * interrupts.
1478 **/
1479 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
1480 {
1481 struct ixgbe_q_vector *q_vector;
1482 int q_vectors, v_idx;
1483 u32 mask;
1484
1485 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1486
1487 /* Populate MSIX to EITR Select */
1488 if (adapter->num_vfs > 32) {
1489 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
1490 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
1491 }
1492
1493 /*
1494 * Populate the IVAR table and set the ITR values to the
1495 * corresponding register.
1496 */
1497 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1498 struct ixgbe_ring *ring;
1499 q_vector = adapter->q_vector[v_idx];
1500
1501 for (ring = q_vector->rx.ring; ring != NULL; ring = ring->next)
1502 ixgbe_set_ivar(adapter, 0, ring->reg_idx, v_idx);
1503
1504 for (ring = q_vector->tx.ring; ring != NULL; ring = ring->next)
1505 ixgbe_set_ivar(adapter, 1, ring->reg_idx, v_idx);
1506
1507 if (q_vector->tx.ring && !q_vector->rx.ring) {
1508 /* tx only vector */
1509 if (adapter->tx_itr_setting == 1)
1510 q_vector->itr = IXGBE_10K_ITR;
1511 else
1512 q_vector->itr = adapter->tx_itr_setting;
1513 } else {
1514 /* rx or rx/tx vector */
1515 if (adapter->rx_itr_setting == 1)
1516 q_vector->itr = IXGBE_20K_ITR;
1517 else
1518 q_vector->itr = adapter->rx_itr_setting;
1519 }
1520
1521 ixgbe_write_eitr(q_vector);
1522 }
1523
1524 switch (adapter->hw.mac.type) {
1525 case ixgbe_mac_82598EB:
1526 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
1527 v_idx);
1528 break;
1529 case ixgbe_mac_82599EB:
1530 case ixgbe_mac_X540:
1531 ixgbe_set_ivar(adapter, -1, 1, v_idx);
1532 break;
1533 default:
1534 break;
1535 }
1536 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
1537
1538 /* set up to autoclear timer, and the vectors */
1539 mask = IXGBE_EIMS_ENABLE_MASK;
1540 mask &= ~(IXGBE_EIMS_OTHER |
1541 IXGBE_EIMS_MAILBOX |
1542 IXGBE_EIMS_LSC);
1543
1544 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
1545 }
1546
1547 enum latency_range {
1548 lowest_latency = 0,
1549 low_latency = 1,
1550 bulk_latency = 2,
1551 latency_invalid = 255
1552 };
1553
1554 /**
1555 * ixgbe_update_itr - update the dynamic ITR value based on statistics
1556 * @q_vector: structure containing interrupt and ring information
1557 * @ring_container: structure containing ring performance data
1558 *
1559 * Stores a new ITR value based on packets and byte
1560 * counts during the last interrupt. The advantage of per interrupt
1561 * computation is faster updates and more accurate ITR for the current
1562 * traffic pattern. Constants in this function were computed
1563 * based on theoretical maximum wire speed and thresholds were set based
1564 * on testing data as well as attempting to minimize response time
1565 * while increasing bulk throughput.
1566 * this functionality is controlled by the InterruptThrottleRate module
1567 * parameter (see ixgbe_param.c)
1568 **/
1569 static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
1570 struct ixgbe_ring_container *ring_container)
1571 {
1572 u64 bytes_perint;
1573 struct ixgbe_adapter *adapter = q_vector->adapter;
1574 int bytes = ring_container->total_bytes;
1575 int packets = ring_container->total_packets;
1576 u32 timepassed_us;
1577 u8 itr_setting = ring_container->itr;
1578
1579 if (packets == 0)
1580 return;
1581
1582 /* simple throttlerate management
1583 * 0-20MB/s lowest (100000 ints/s)
1584 * 20-100MB/s low (20000 ints/s)
1585 * 100-1249MB/s bulk (8000 ints/s)
1586 */
1587 /* what was last interrupt timeslice? */
1588 timepassed_us = q_vector->itr >> 2;
1589 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1590
1591 switch (itr_setting) {
1592 case lowest_latency:
1593 if (bytes_perint > adapter->eitr_low)
1594 itr_setting = low_latency;
1595 break;
1596 case low_latency:
1597 if (bytes_perint > adapter->eitr_high)
1598 itr_setting = bulk_latency;
1599 else if (bytes_perint <= adapter->eitr_low)
1600 itr_setting = lowest_latency;
1601 break;
1602 case bulk_latency:
1603 if (bytes_perint <= adapter->eitr_high)
1604 itr_setting = low_latency;
1605 break;
1606 }
1607
1608 /* clear work counters since we have the values we need */
1609 ring_container->total_bytes = 0;
1610 ring_container->total_packets = 0;
1611
1612 /* write updated itr to ring container */
1613 ring_container->itr = itr_setting;
1614 }
1615
1616 /**
1617 * ixgbe_write_eitr - write EITR register in hardware specific way
1618 * @q_vector: structure containing interrupt and ring information
1619 *
1620 * This function is made to be called by ethtool and by the driver
1621 * when it needs to update EITR registers at runtime. Hardware
1622 * specific quirks/differences are taken care of here.
1623 */
1624 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1625 {
1626 struct ixgbe_adapter *adapter = q_vector->adapter;
1627 struct ixgbe_hw *hw = &adapter->hw;
1628 int v_idx = q_vector->v_idx;
1629 u32 itr_reg = q_vector->itr;
1630
1631 switch (adapter->hw.mac.type) {
1632 case ixgbe_mac_82598EB:
1633 /* must write high and low 16 bits to reset counter */
1634 itr_reg |= (itr_reg << 16);
1635 break;
1636 case ixgbe_mac_82599EB:
1637 case ixgbe_mac_X540:
1638 /*
1639 * set the WDIS bit to not clear the timer bits and cause an
1640 * immediate assertion of the interrupt
1641 */
1642 itr_reg |= IXGBE_EITR_CNT_WDIS;
1643 break;
1644 default:
1645 break;
1646 }
1647 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1648 }
1649
1650 static void ixgbe_set_itr(struct ixgbe_q_vector *q_vector)
1651 {
1652 u32 new_itr = q_vector->itr;
1653 u8 current_itr;
1654
1655 ixgbe_update_itr(q_vector, &q_vector->tx);
1656 ixgbe_update_itr(q_vector, &q_vector->rx);
1657
1658 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
1659
1660 switch (current_itr) {
1661 /* counts and packets in update_itr are dependent on these numbers */
1662 case lowest_latency:
1663 new_itr = IXGBE_100K_ITR;
1664 break;
1665 case low_latency:
1666 new_itr = IXGBE_20K_ITR;
1667 break;
1668 case bulk_latency:
1669 new_itr = IXGBE_8K_ITR;
1670 break;
1671 default:
1672 break;
1673 }
1674
1675 if (new_itr != q_vector->itr) {
1676 /* do an exponential smoothing */
1677 new_itr = (10 * new_itr * q_vector->itr) /
1678 ((9 * new_itr) + q_vector->itr);
1679
1680 /* save the algorithm value here */
1681 q_vector->itr = new_itr & IXGBE_MAX_EITR;
1682
1683 ixgbe_write_eitr(q_vector);
1684 }
1685 }
1686
1687 /**
1688 * ixgbe_check_overtemp_subtask - check for over tempurature
1689 * @adapter: pointer to adapter
1690 **/
1691 static void ixgbe_check_overtemp_subtask(struct ixgbe_adapter *adapter)
1692 {
1693 struct ixgbe_hw *hw = &adapter->hw;
1694 u32 eicr = adapter->interrupt_event;
1695
1696 if (test_bit(__IXGBE_DOWN, &adapter->state))
1697 return;
1698
1699 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
1700 !(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_EVENT))
1701 return;
1702
1703 adapter->flags2 &= ~IXGBE_FLAG2_TEMP_SENSOR_EVENT;
1704
1705 switch (hw->device_id) {
1706 case IXGBE_DEV_ID_82599_T3_LOM:
1707 /*
1708 * Since the warning interrupt is for both ports
1709 * we don't have to check if:
1710 * - This interrupt wasn't for our port.
1711 * - We may have missed the interrupt so always have to
1712 * check if we got a LSC
1713 */
1714 if (!(eicr & IXGBE_EICR_GPI_SDP0) &&
1715 !(eicr & IXGBE_EICR_LSC))
1716 return;
1717
1718 if (!(eicr & IXGBE_EICR_LSC) && hw->mac.ops.check_link) {
1719 u32 autoneg;
1720 bool link_up = false;
1721
1722 hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
1723
1724 if (link_up)
1725 return;
1726 }
1727
1728 /* Check if this is not due to overtemp */
1729 if (hw->phy.ops.check_overtemp(hw) != IXGBE_ERR_OVERTEMP)
1730 return;
1731
1732 break;
1733 default:
1734 if (!(eicr & IXGBE_EICR_GPI_SDP0))
1735 return;
1736 break;
1737 }
1738 e_crit(drv,
1739 "Network adapter has been stopped because it has over heated. "
1740 "Restart the computer. If the problem persists, "
1741 "power off the system and replace the adapter\n");
1742
1743 adapter->interrupt_event = 0;
1744 }
1745
1746 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1747 {
1748 struct ixgbe_hw *hw = &adapter->hw;
1749
1750 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1751 (eicr & IXGBE_EICR_GPI_SDP1)) {
1752 e_crit(probe, "Fan has stopped, replace the adapter\n");
1753 /* write to clear the interrupt */
1754 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1755 }
1756 }
1757
1758 static void ixgbe_check_overtemp_event(struct ixgbe_adapter *adapter, u32 eicr)
1759 {
1760 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE))
1761 return;
1762
1763 switch (adapter->hw.mac.type) {
1764 case ixgbe_mac_82599EB:
1765 /*
1766 * Need to check link state so complete overtemp check
1767 * on service task
1768 */
1769 if (((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)) &&
1770 (!test_bit(__IXGBE_DOWN, &adapter->state))) {
1771 adapter->interrupt_event = eicr;
1772 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
1773 ixgbe_service_event_schedule(adapter);
1774 return;
1775 }
1776 return;
1777 case ixgbe_mac_X540:
1778 if (!(eicr & IXGBE_EICR_TS))
1779 return;
1780 break;
1781 default:
1782 return;
1783 }
1784
1785 e_crit(drv,
1786 "Network adapter has been stopped because it has over heated. "
1787 "Restart the computer. If the problem persists, "
1788 "power off the system and replace the adapter\n");
1789 }
1790
1791 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1792 {
1793 struct ixgbe_hw *hw = &adapter->hw;
1794
1795 if (eicr & IXGBE_EICR_GPI_SDP2) {
1796 /* Clear the interrupt */
1797 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1798 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1799 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
1800 ixgbe_service_event_schedule(adapter);
1801 }
1802 }
1803
1804 if (eicr & IXGBE_EICR_GPI_SDP1) {
1805 /* Clear the interrupt */
1806 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1807 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1808 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
1809 ixgbe_service_event_schedule(adapter);
1810 }
1811 }
1812 }
1813
1814 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1815 {
1816 struct ixgbe_hw *hw = &adapter->hw;
1817
1818 adapter->lsc_int++;
1819 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1820 adapter->link_check_timeout = jiffies;
1821 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1822 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1823 IXGBE_WRITE_FLUSH(hw);
1824 ixgbe_service_event_schedule(adapter);
1825 }
1826 }
1827
1828 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1829 u64 qmask)
1830 {
1831 u32 mask;
1832 struct ixgbe_hw *hw = &adapter->hw;
1833
1834 switch (hw->mac.type) {
1835 case ixgbe_mac_82598EB:
1836 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1837 IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
1838 break;
1839 case ixgbe_mac_82599EB:
1840 case ixgbe_mac_X540:
1841 mask = (qmask & 0xFFFFFFFF);
1842 if (mask)
1843 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
1844 mask = (qmask >> 32);
1845 if (mask)
1846 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
1847 break;
1848 default:
1849 break;
1850 }
1851 /* skip the flush */
1852 }
1853
1854 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1855 u64 qmask)
1856 {
1857 u32 mask;
1858 struct ixgbe_hw *hw = &adapter->hw;
1859
1860 switch (hw->mac.type) {
1861 case ixgbe_mac_82598EB:
1862 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1863 IXGBE_WRITE_REG(hw, IXGBE_EIMC, mask);
1864 break;
1865 case ixgbe_mac_82599EB:
1866 case ixgbe_mac_X540:
1867 mask = (qmask & 0xFFFFFFFF);
1868 if (mask)
1869 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(0), mask);
1870 mask = (qmask >> 32);
1871 if (mask)
1872 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(1), mask);
1873 break;
1874 default:
1875 break;
1876 }
1877 /* skip the flush */
1878 }
1879
1880 /**
1881 * ixgbe_irq_enable - Enable default interrupt generation settings
1882 * @adapter: board private structure
1883 **/
1884 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
1885 bool flush)
1886 {
1887 u32 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
1888
1889 /* don't reenable LSC while waiting for link */
1890 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
1891 mask &= ~IXGBE_EIMS_LSC;
1892
1893 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
1894 switch (adapter->hw.mac.type) {
1895 case ixgbe_mac_82599EB:
1896 mask |= IXGBE_EIMS_GPI_SDP0;
1897 break;
1898 case ixgbe_mac_X540:
1899 mask |= IXGBE_EIMS_TS;
1900 break;
1901 default:
1902 break;
1903 }
1904 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
1905 mask |= IXGBE_EIMS_GPI_SDP1;
1906 switch (adapter->hw.mac.type) {
1907 case ixgbe_mac_82599EB:
1908 mask |= IXGBE_EIMS_GPI_SDP1;
1909 mask |= IXGBE_EIMS_GPI_SDP2;
1910 case ixgbe_mac_X540:
1911 mask |= IXGBE_EIMS_ECC;
1912 mask |= IXGBE_EIMS_MAILBOX;
1913 break;
1914 default:
1915 break;
1916 }
1917 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
1918 !(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
1919 mask |= IXGBE_EIMS_FLOW_DIR;
1920
1921 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1922 if (queues)
1923 ixgbe_irq_enable_queues(adapter, ~0);
1924 if (flush)
1925 IXGBE_WRITE_FLUSH(&adapter->hw);
1926 }
1927
1928 static irqreturn_t ixgbe_msix_other(int irq, void *data)
1929 {
1930 struct ixgbe_adapter *adapter = data;
1931 struct ixgbe_hw *hw = &adapter->hw;
1932 u32 eicr;
1933
1934 /*
1935 * Workaround for Silicon errata. Use clear-by-write instead
1936 * of clear-by-read. Reading with EICS will return the
1937 * interrupt causes without clearing, which later be done
1938 * with the write to EICR.
1939 */
1940 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1941 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1942
1943 if (eicr & IXGBE_EICR_LSC)
1944 ixgbe_check_lsc(adapter);
1945
1946 if (eicr & IXGBE_EICR_MAILBOX)
1947 ixgbe_msg_task(adapter);
1948
1949 switch (hw->mac.type) {
1950 case ixgbe_mac_82599EB:
1951 case ixgbe_mac_X540:
1952 if (eicr & IXGBE_EICR_ECC)
1953 e_info(link, "Received unrecoverable ECC Err, please "
1954 "reboot\n");
1955 /* Handle Flow Director Full threshold interrupt */
1956 if (eicr & IXGBE_EICR_FLOW_DIR) {
1957 int reinit_count = 0;
1958 int i;
1959 for (i = 0; i < adapter->num_tx_queues; i++) {
1960 struct ixgbe_ring *ring = adapter->tx_ring[i];
1961 if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE,
1962 &ring->state))
1963 reinit_count++;
1964 }
1965 if (reinit_count) {
1966 /* no more flow director interrupts until after init */
1967 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_FLOW_DIR);
1968 adapter->flags2 |= IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
1969 ixgbe_service_event_schedule(adapter);
1970 }
1971 }
1972 ixgbe_check_sfp_event(adapter, eicr);
1973 ixgbe_check_overtemp_event(adapter, eicr);
1974 break;
1975 default:
1976 break;
1977 }
1978
1979 ixgbe_check_fan_failure(adapter, eicr);
1980
1981 /* re-enable the original interrupt state, no lsc, no queues */
1982 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1983 ixgbe_irq_enable(adapter, false, false);
1984
1985 return IRQ_HANDLED;
1986 }
1987
1988 static irqreturn_t ixgbe_msix_clean_rings(int irq, void *data)
1989 {
1990 struct ixgbe_q_vector *q_vector = data;
1991
1992 /* EIAM disabled interrupts (on this vector) for us */
1993
1994 if (q_vector->rx.ring || q_vector->tx.ring)
1995 napi_schedule(&q_vector->napi);
1996
1997 return IRQ_HANDLED;
1998 }
1999
2000 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
2001 int r_idx)
2002 {
2003 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2004 struct ixgbe_ring *rx_ring = a->rx_ring[r_idx];
2005
2006 rx_ring->q_vector = q_vector;
2007 rx_ring->next = q_vector->rx.ring;
2008 q_vector->rx.ring = rx_ring;
2009 q_vector->rx.count++;
2010 }
2011
2012 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
2013 int t_idx)
2014 {
2015 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2016 struct ixgbe_ring *tx_ring = a->tx_ring[t_idx];
2017
2018 tx_ring->q_vector = q_vector;
2019 tx_ring->next = q_vector->tx.ring;
2020 q_vector->tx.ring = tx_ring;
2021 q_vector->tx.count++;
2022 q_vector->tx.work_limit = a->tx_work_limit;
2023 }
2024
2025 /**
2026 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
2027 * @adapter: board private structure to initialize
2028 *
2029 * This function maps descriptor rings to the queue-specific vectors
2030 * we were allotted through the MSI-X enabling code. Ideally, we'd have
2031 * one vector per ring/queue, but on a constrained vector budget, we
2032 * group the rings as "efficiently" as possible. You would add new
2033 * mapping configurations in here.
2034 **/
2035 static void ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter)
2036 {
2037 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2038 int rxr_remaining = adapter->num_rx_queues, rxr_idx = 0;
2039 int txr_remaining = adapter->num_tx_queues, txr_idx = 0;
2040 int v_start = 0;
2041
2042 /* only one q_vector if MSI-X is disabled. */
2043 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2044 q_vectors = 1;
2045
2046 /*
2047 * If we don't have enough vectors for a 1-to-1 mapping, we'll have to
2048 * group them so there are multiple queues per vector.
2049 *
2050 * Re-adjusting *qpv takes care of the remainder.
2051 */
2052 for (; v_start < q_vectors && rxr_remaining; v_start++) {
2053 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - v_start);
2054 for (; rqpv; rqpv--, rxr_idx++, rxr_remaining--)
2055 map_vector_to_rxq(adapter, v_start, rxr_idx);
2056 }
2057
2058 /*
2059 * If there are not enough q_vectors for each ring to have it's own
2060 * vector then we must pair up Rx/Tx on a each vector
2061 */
2062 if ((v_start + txr_remaining) > q_vectors)
2063 v_start = 0;
2064
2065 for (; v_start < q_vectors && txr_remaining; v_start++) {
2066 int tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - v_start);
2067 for (; tqpv; tqpv--, txr_idx++, txr_remaining--)
2068 map_vector_to_txq(adapter, v_start, txr_idx);
2069 }
2070 }
2071
2072 /**
2073 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2074 * @adapter: board private structure
2075 *
2076 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2077 * interrupts from the kernel.
2078 **/
2079 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2080 {
2081 struct net_device *netdev = adapter->netdev;
2082 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2083 int vector, err;
2084 int ri = 0, ti = 0;
2085
2086 for (vector = 0; vector < q_vectors; vector++) {
2087 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
2088 struct msix_entry *entry = &adapter->msix_entries[vector];
2089
2090 if (q_vector->tx.ring && q_vector->rx.ring) {
2091 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2092 "%s-%s-%d", netdev->name, "TxRx", ri++);
2093 ti++;
2094 } else if (q_vector->rx.ring) {
2095 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2096 "%s-%s-%d", netdev->name, "rx", ri++);
2097 } else if (q_vector->tx.ring) {
2098 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2099 "%s-%s-%d", netdev->name, "tx", ti++);
2100 } else {
2101 /* skip this unused q_vector */
2102 continue;
2103 }
2104 err = request_irq(entry->vector, &ixgbe_msix_clean_rings, 0,
2105 q_vector->name, q_vector);
2106 if (err) {
2107 e_err(probe, "request_irq failed for MSIX interrupt "
2108 "Error: %d\n", err);
2109 goto free_queue_irqs;
2110 }
2111 /* If Flow Director is enabled, set interrupt affinity */
2112 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2113 /* assign the mask for this irq */
2114 irq_set_affinity_hint(entry->vector,
2115 q_vector->affinity_mask);
2116 }
2117 }
2118
2119 err = request_irq(adapter->msix_entries[vector].vector,
2120 ixgbe_msix_other, 0, netdev->name, adapter);
2121 if (err) {
2122 e_err(probe, "request_irq for msix_lsc failed: %d\n", err);
2123 goto free_queue_irqs;
2124 }
2125
2126 return 0;
2127
2128 free_queue_irqs:
2129 while (vector) {
2130 vector--;
2131 irq_set_affinity_hint(adapter->msix_entries[vector].vector,
2132 NULL);
2133 free_irq(adapter->msix_entries[vector].vector,
2134 adapter->q_vector[vector]);
2135 }
2136 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2137 pci_disable_msix(adapter->pdev);
2138 kfree(adapter->msix_entries);
2139 adapter->msix_entries = NULL;
2140 return err;
2141 }
2142
2143 /**
2144 * ixgbe_intr - legacy mode Interrupt Handler
2145 * @irq: interrupt number
2146 * @data: pointer to a network interface device structure
2147 **/
2148 static irqreturn_t ixgbe_intr(int irq, void *data)
2149 {
2150 struct ixgbe_adapter *adapter = data;
2151 struct ixgbe_hw *hw = &adapter->hw;
2152 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2153 u32 eicr;
2154
2155 /*
2156 * Workaround for silicon errata on 82598. Mask the interrupts
2157 * before the read of EICR.
2158 */
2159 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2160
2161 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2162 * therefore no explicit interrupt disable is necessary */
2163 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2164 if (!eicr) {
2165 /*
2166 * shared interrupt alert!
2167 * make sure interrupts are enabled because the read will
2168 * have disabled interrupts due to EIAM
2169 * finish the workaround of silicon errata on 82598. Unmask
2170 * the interrupt that we masked before the EICR read.
2171 */
2172 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2173 ixgbe_irq_enable(adapter, true, true);
2174 return IRQ_NONE; /* Not our interrupt */
2175 }
2176
2177 if (eicr & IXGBE_EICR_LSC)
2178 ixgbe_check_lsc(adapter);
2179
2180 switch (hw->mac.type) {
2181 case ixgbe_mac_82599EB:
2182 ixgbe_check_sfp_event(adapter, eicr);
2183 /* Fall through */
2184 case ixgbe_mac_X540:
2185 if (eicr & IXGBE_EICR_ECC)
2186 e_info(link, "Received unrecoverable ECC err, please "
2187 "reboot\n");
2188 ixgbe_check_overtemp_event(adapter, eicr);
2189 break;
2190 default:
2191 break;
2192 }
2193
2194 ixgbe_check_fan_failure(adapter, eicr);
2195
2196 if (napi_schedule_prep(&(q_vector->napi))) {
2197 /* would disable interrupts here but EIAM disabled it */
2198 __napi_schedule(&(q_vector->napi));
2199 }
2200
2201 /*
2202 * re-enable link(maybe) and non-queue interrupts, no flush.
2203 * ixgbe_poll will re-enable the queue interrupts
2204 */
2205
2206 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2207 ixgbe_irq_enable(adapter, false, false);
2208
2209 return IRQ_HANDLED;
2210 }
2211
2212 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
2213 {
2214 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2215 int i;
2216
2217 /* legacy and MSI only use one vector */
2218 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2219 q_vectors = 1;
2220
2221 for (i = 0; i < adapter->num_rx_queues; i++) {
2222 adapter->rx_ring[i]->q_vector = NULL;
2223 adapter->rx_ring[i]->next = NULL;
2224 }
2225 for (i = 0; i < adapter->num_tx_queues; i++) {
2226 adapter->tx_ring[i]->q_vector = NULL;
2227 adapter->tx_ring[i]->next = NULL;
2228 }
2229
2230 for (i = 0; i < q_vectors; i++) {
2231 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
2232 memset(&q_vector->rx, 0, sizeof(struct ixgbe_ring_container));
2233 memset(&q_vector->tx, 0, sizeof(struct ixgbe_ring_container));
2234 }
2235 }
2236
2237 /**
2238 * ixgbe_request_irq - initialize interrupts
2239 * @adapter: board private structure
2240 *
2241 * Attempts to configure interrupts using the best available
2242 * capabilities of the hardware and kernel.
2243 **/
2244 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
2245 {
2246 struct net_device *netdev = adapter->netdev;
2247 int err;
2248
2249 /* map all of the rings to the q_vectors */
2250 ixgbe_map_rings_to_vectors(adapter);
2251
2252 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2253 err = ixgbe_request_msix_irqs(adapter);
2254 else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED)
2255 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
2256 netdev->name, adapter);
2257 else
2258 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
2259 netdev->name, adapter);
2260
2261 if (err) {
2262 e_err(probe, "request_irq failed, Error %d\n", err);
2263
2264 /* place q_vectors and rings back into a known good state */
2265 ixgbe_reset_q_vectors(adapter);
2266 }
2267
2268 return err;
2269 }
2270
2271 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
2272 {
2273 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2274 int i, q_vectors;
2275
2276 q_vectors = adapter->num_msix_vectors;
2277 i = q_vectors - 1;
2278 free_irq(adapter->msix_entries[i].vector, adapter);
2279 i--;
2280
2281 for (; i >= 0; i--) {
2282 /* free only the irqs that were actually requested */
2283 if (!adapter->q_vector[i]->rx.ring &&
2284 !adapter->q_vector[i]->tx.ring)
2285 continue;
2286
2287 /* clear the affinity_mask in the IRQ descriptor */
2288 irq_set_affinity_hint(adapter->msix_entries[i].vector,
2289 NULL);
2290
2291 free_irq(adapter->msix_entries[i].vector,
2292 adapter->q_vector[i]);
2293 }
2294 } else {
2295 free_irq(adapter->pdev->irq, adapter);
2296 }
2297
2298 /* clear q_vector state information */
2299 ixgbe_reset_q_vectors(adapter);
2300 }
2301
2302 /**
2303 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
2304 * @adapter: board private structure
2305 **/
2306 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
2307 {
2308 switch (adapter->hw.mac.type) {
2309 case ixgbe_mac_82598EB:
2310 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
2311 break;
2312 case ixgbe_mac_82599EB:
2313 case ixgbe_mac_X540:
2314 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
2315 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
2316 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
2317 break;
2318 default:
2319 break;
2320 }
2321 IXGBE_WRITE_FLUSH(&adapter->hw);
2322 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2323 int i;
2324 for (i = 0; i < adapter->num_msix_vectors; i++)
2325 synchronize_irq(adapter->msix_entries[i].vector);
2326 } else {
2327 synchronize_irq(adapter->pdev->irq);
2328 }
2329 }
2330
2331 /**
2332 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
2333 *
2334 **/
2335 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
2336 {
2337 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2338
2339 /* rx/tx vector */
2340 if (adapter->rx_itr_setting == 1)
2341 q_vector->itr = IXGBE_20K_ITR;
2342 else
2343 q_vector->itr = adapter->rx_itr_setting;
2344
2345 ixgbe_write_eitr(q_vector);
2346
2347 ixgbe_set_ivar(adapter, 0, 0, 0);
2348 ixgbe_set_ivar(adapter, 1, 0, 0);
2349
2350 e_info(hw, "Legacy interrupt IVAR setup done\n");
2351 }
2352
2353 /**
2354 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
2355 * @adapter: board private structure
2356 * @ring: structure containing ring specific data
2357 *
2358 * Configure the Tx descriptor ring after a reset.
2359 **/
2360 void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
2361 struct ixgbe_ring *ring)
2362 {
2363 struct ixgbe_hw *hw = &adapter->hw;
2364 u64 tdba = ring->dma;
2365 int wait_loop = 10;
2366 u32 txdctl = IXGBE_TXDCTL_ENABLE;
2367 u8 reg_idx = ring->reg_idx;
2368
2369 /* disable queue to avoid issues while updating state */
2370 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), 0);
2371 IXGBE_WRITE_FLUSH(hw);
2372
2373 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
2374 (tdba & DMA_BIT_MASK(32)));
2375 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
2376 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
2377 ring->count * sizeof(union ixgbe_adv_tx_desc));
2378 IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
2379 IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
2380 ring->tail = hw->hw_addr + IXGBE_TDT(reg_idx);
2381
2382 /*
2383 * set WTHRESH to encourage burst writeback, it should not be set
2384 * higher than 1 when ITR is 0 as it could cause false TX hangs
2385 *
2386 * In order to avoid issues WTHRESH + PTHRESH should always be equal
2387 * to or less than the number of on chip descriptors, which is
2388 * currently 40.
2389 */
2390 if (!adapter->tx_itr_setting || !adapter->rx_itr_setting)
2391 txdctl |= (1 << 16); /* WTHRESH = 1 */
2392 else
2393 txdctl |= (8 << 16); /* WTHRESH = 8 */
2394
2395 /* PTHRESH=32 is needed to avoid a Tx hang with DFP enabled. */
2396 txdctl |= (1 << 8) | /* HTHRESH = 1 */
2397 32; /* PTHRESH = 32 */
2398
2399 /* reinitialize flowdirector state */
2400 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
2401 adapter->atr_sample_rate) {
2402 ring->atr_sample_rate = adapter->atr_sample_rate;
2403 ring->atr_count = 0;
2404 set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state);
2405 } else {
2406 ring->atr_sample_rate = 0;
2407 }
2408
2409 clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state);
2410
2411 /* enable queue */
2412 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
2413
2414 /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2415 if (hw->mac.type == ixgbe_mac_82598EB &&
2416 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2417 return;
2418
2419 /* poll to verify queue is enabled */
2420 do {
2421 usleep_range(1000, 2000);
2422 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2423 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
2424 if (!wait_loop)
2425 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx);
2426 }
2427
2428 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
2429 {
2430 struct ixgbe_hw *hw = &adapter->hw;
2431 u32 rttdcs;
2432 u32 reg;
2433 u8 tcs = netdev_get_num_tc(adapter->netdev);
2434
2435 if (hw->mac.type == ixgbe_mac_82598EB)
2436 return;
2437
2438 /* disable the arbiter while setting MTQC */
2439 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
2440 rttdcs |= IXGBE_RTTDCS_ARBDIS;
2441 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2442
2443 /* set transmit pool layout */
2444 switch (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
2445 case (IXGBE_FLAG_SRIOV_ENABLED):
2446 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2447 (IXGBE_MTQC_VT_ENA | IXGBE_MTQC_64VF));
2448 break;
2449 default:
2450 if (!tcs)
2451 reg = IXGBE_MTQC_64Q_1PB;
2452 else if (tcs <= 4)
2453 reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
2454 else
2455 reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
2456
2457 IXGBE_WRITE_REG(hw, IXGBE_MTQC, reg);
2458
2459 /* Enable Security TX Buffer IFG for multiple pb */
2460 if (tcs) {
2461 reg = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);
2462 reg |= IXGBE_SECTX_DCB;
2463 IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, reg);
2464 }
2465 break;
2466 }
2467
2468 /* re-enable the arbiter */
2469 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
2470 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2471 }
2472
2473 /**
2474 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
2475 * @adapter: board private structure
2476 *
2477 * Configure the Tx unit of the MAC after a reset.
2478 **/
2479 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
2480 {
2481 struct ixgbe_hw *hw = &adapter->hw;
2482 u32 dmatxctl;
2483 u32 i;
2484
2485 ixgbe_setup_mtqc(adapter);
2486
2487 if (hw->mac.type != ixgbe_mac_82598EB) {
2488 /* DMATXCTL.EN must be before Tx queues are enabled */
2489 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2490 dmatxctl |= IXGBE_DMATXCTL_TE;
2491 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2492 }
2493
2494 /* Setup the HW Tx Head and Tail descriptor pointers */
2495 for (i = 0; i < adapter->num_tx_queues; i++)
2496 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
2497 }
2498
2499 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
2500
2501 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
2502 struct ixgbe_ring *rx_ring)
2503 {
2504 u32 srrctl;
2505 u8 reg_idx = rx_ring->reg_idx;
2506
2507 switch (adapter->hw.mac.type) {
2508 case ixgbe_mac_82598EB: {
2509 struct ixgbe_ring_feature *feature = adapter->ring_feature;
2510 const int mask = feature[RING_F_RSS].mask;
2511 reg_idx = reg_idx & mask;
2512 }
2513 break;
2514 case ixgbe_mac_82599EB:
2515 case ixgbe_mac_X540:
2516 default:
2517 break;
2518 }
2519
2520 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(reg_idx));
2521
2522 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
2523 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
2524 if (adapter->num_vfs)
2525 srrctl |= IXGBE_SRRCTL_DROP_EN;
2526
2527 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
2528 IXGBE_SRRCTL_BSIZEHDR_MASK;
2529
2530 if (ring_is_ps_enabled(rx_ring)) {
2531 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
2532 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2533 #else
2534 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2535 #endif
2536 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
2537 } else {
2538 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
2539 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2540 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
2541 }
2542
2543 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(reg_idx), srrctl);
2544 }
2545
2546 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
2547 {
2548 struct ixgbe_hw *hw = &adapter->hw;
2549 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2550 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2551 0x6A3E67EA, 0x14364D17, 0x3BED200D};
2552 u32 mrqc = 0, reta = 0;
2553 u32 rxcsum;
2554 int i, j;
2555 u8 tcs = netdev_get_num_tc(adapter->netdev);
2556 int maxq = adapter->ring_feature[RING_F_RSS].indices;
2557
2558 if (tcs)
2559 maxq = min(maxq, adapter->num_tx_queues / tcs);
2560
2561 /* Fill out hash function seeds */
2562 for (i = 0; i < 10; i++)
2563 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2564
2565 /* Fill out redirection table */
2566 for (i = 0, j = 0; i < 128; i++, j++) {
2567 if (j == maxq)
2568 j = 0;
2569 /* reta = 4-byte sliding window of
2570 * 0x00..(indices-1)(indices-1)00..etc. */
2571 reta = (reta << 8) | (j * 0x11);
2572 if ((i & 3) == 3)
2573 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2574 }
2575
2576 /* Disable indicating checksum in descriptor, enables RSS hash */
2577 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2578 rxcsum |= IXGBE_RXCSUM_PCSD;
2579 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2580
2581 if (adapter->hw.mac.type == ixgbe_mac_82598EB &&
2582 (adapter->flags & IXGBE_FLAG_RSS_ENABLED)) {
2583 mrqc = IXGBE_MRQC_RSSEN;
2584 } else {
2585 int mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
2586 | IXGBE_FLAG_SRIOV_ENABLED);
2587
2588 switch (mask) {
2589 case (IXGBE_FLAG_RSS_ENABLED):
2590 if (!tcs)
2591 mrqc = IXGBE_MRQC_RSSEN;
2592 else if (tcs <= 4)
2593 mrqc = IXGBE_MRQC_RTRSS4TCEN;
2594 else
2595 mrqc = IXGBE_MRQC_RTRSS8TCEN;
2596 break;
2597 case (IXGBE_FLAG_SRIOV_ENABLED):
2598 mrqc = IXGBE_MRQC_VMDQEN;
2599 break;
2600 default:
2601 break;
2602 }
2603 }
2604
2605 /* Perform hash on these packet types */
2606 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2607 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2608 | IXGBE_MRQC_RSS_FIELD_IPV6
2609 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
2610
2611 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2612 }
2613
2614 /**
2615 * ixgbe_configure_rscctl - enable RSC for the indicated ring
2616 * @adapter: address of board private structure
2617 * @index: index of ring to set
2618 **/
2619 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
2620 struct ixgbe_ring *ring)
2621 {
2622 struct ixgbe_hw *hw = &adapter->hw;
2623 u32 rscctrl;
2624 int rx_buf_len;
2625 u8 reg_idx = ring->reg_idx;
2626
2627 if (!ring_is_rsc_enabled(ring))
2628 return;
2629
2630 rx_buf_len = ring->rx_buf_len;
2631 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
2632 rscctrl |= IXGBE_RSCCTL_RSCEN;
2633 /*
2634 * we must limit the number of descriptors so that the
2635 * total size of max desc * buf_len is not greater
2636 * than 65536
2637 */
2638 if (ring_is_ps_enabled(ring)) {
2639 #if (PAGE_SIZE < 8192)
2640 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2641 #elif (PAGE_SIZE < 16384)
2642 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2643 #elif (PAGE_SIZE < 32768)
2644 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2645 #else
2646 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2647 #endif
2648 } else {
2649 if (rx_buf_len <= IXGBE_RXBUFFER_4K)
2650 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2651 else if (rx_buf_len <= IXGBE_RXBUFFER_8K)
2652 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2653 else
2654 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2655 }
2656 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
2657 }
2658
2659 /**
2660 * ixgbe_set_uta - Set unicast filter table address
2661 * @adapter: board private structure
2662 *
2663 * The unicast table address is a register array of 32-bit registers.
2664 * The table is meant to be used in a way similar to how the MTA is used
2665 * however due to certain limitations in the hardware it is necessary to
2666 * set all the hash bits to 1 and use the VMOLR ROPE bit as a promiscuous
2667 * enable bit to allow vlan tag stripping when promiscuous mode is enabled
2668 **/
2669 static void ixgbe_set_uta(struct ixgbe_adapter *adapter)
2670 {
2671 struct ixgbe_hw *hw = &adapter->hw;
2672 int i;
2673
2674 /* The UTA table only exists on 82599 hardware and newer */
2675 if (hw->mac.type < ixgbe_mac_82599EB)
2676 return;
2677
2678 /* we only need to do this if VMDq is enabled */
2679 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
2680 return;
2681
2682 for (i = 0; i < 128; i++)
2683 IXGBE_WRITE_REG(hw, IXGBE_UTA(i), ~0);
2684 }
2685
2686 #define IXGBE_MAX_RX_DESC_POLL 10
2687 static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
2688 struct ixgbe_ring *ring)
2689 {
2690 struct ixgbe_hw *hw = &adapter->hw;
2691 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
2692 u32 rxdctl;
2693 u8 reg_idx = ring->reg_idx;
2694
2695 /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2696 if (hw->mac.type == ixgbe_mac_82598EB &&
2697 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2698 return;
2699
2700 do {
2701 usleep_range(1000, 2000);
2702 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2703 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
2704
2705 if (!wait_loop) {
2706 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
2707 "the polling period\n", reg_idx);
2708 }
2709 }
2710
2711 void ixgbe_disable_rx_queue(struct ixgbe_adapter *adapter,
2712 struct ixgbe_ring *ring)
2713 {
2714 struct ixgbe_hw *hw = &adapter->hw;
2715 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
2716 u32 rxdctl;
2717 u8 reg_idx = ring->reg_idx;
2718
2719 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2720 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
2721
2722 /* write value back with RXDCTL.ENABLE bit cleared */
2723 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
2724
2725 if (hw->mac.type == ixgbe_mac_82598EB &&
2726 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2727 return;
2728
2729 /* the hardware may take up to 100us to really disable the rx queue */
2730 do {
2731 udelay(10);
2732 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2733 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
2734
2735 if (!wait_loop) {
2736 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not cleared within "
2737 "the polling period\n", reg_idx);
2738 }
2739 }
2740
2741 void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
2742 struct ixgbe_ring *ring)
2743 {
2744 struct ixgbe_hw *hw = &adapter->hw;
2745 u64 rdba = ring->dma;
2746 u32 rxdctl;
2747 u8 reg_idx = ring->reg_idx;
2748
2749 /* disable queue to avoid issues while updating state */
2750 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2751 ixgbe_disable_rx_queue(adapter, ring);
2752
2753 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
2754 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
2755 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
2756 ring->count * sizeof(union ixgbe_adv_rx_desc));
2757 IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
2758 IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
2759 ring->tail = hw->hw_addr + IXGBE_RDT(reg_idx);
2760
2761 ixgbe_configure_srrctl(adapter, ring);
2762 ixgbe_configure_rscctl(adapter, ring);
2763
2764 /* If operating in IOV mode set RLPML for X540 */
2765 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) &&
2766 hw->mac.type == ixgbe_mac_X540) {
2767 rxdctl &= ~IXGBE_RXDCTL_RLPMLMASK;
2768 rxdctl |= ((ring->netdev->mtu + ETH_HLEN +
2769 ETH_FCS_LEN + VLAN_HLEN) | IXGBE_RXDCTL_RLPML_EN);
2770 }
2771
2772 if (hw->mac.type == ixgbe_mac_82598EB) {
2773 /*
2774 * enable cache line friendly hardware writes:
2775 * PTHRESH=32 descriptors (half the internal cache),
2776 * this also removes ugly rx_no_buffer_count increment
2777 * HTHRESH=4 descriptors (to minimize latency on fetch)
2778 * WTHRESH=8 burst writeback up to two cache lines
2779 */
2780 rxdctl &= ~0x3FFFFF;
2781 rxdctl |= 0x080420;
2782 }
2783
2784 /* enable receive descriptor ring */
2785 rxdctl |= IXGBE_RXDCTL_ENABLE;
2786 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
2787
2788 ixgbe_rx_desc_queue_enable(adapter, ring);
2789 ixgbe_alloc_rx_buffers(ring, ixgbe_desc_unused(ring));
2790 }
2791
2792 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
2793 {
2794 struct ixgbe_hw *hw = &adapter->hw;
2795 int p;
2796
2797 /* PSRTYPE must be initialized in non 82598 adapters */
2798 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
2799 IXGBE_PSRTYPE_UDPHDR |
2800 IXGBE_PSRTYPE_IPV4HDR |
2801 IXGBE_PSRTYPE_L2HDR |
2802 IXGBE_PSRTYPE_IPV6HDR;
2803
2804 if (hw->mac.type == ixgbe_mac_82598EB)
2805 return;
2806
2807 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED)
2808 psrtype |= (adapter->num_rx_queues_per_pool << 29);
2809
2810 for (p = 0; p < adapter->num_rx_pools; p++)
2811 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(adapter->num_vfs + p),
2812 psrtype);
2813 }
2814
2815 static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
2816 {
2817 struct ixgbe_hw *hw = &adapter->hw;
2818 u32 gcr_ext;
2819 u32 vt_reg_bits;
2820 u32 reg_offset, vf_shift;
2821 u32 vmdctl;
2822 int i;
2823
2824 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
2825 return;
2826
2827 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
2828 vt_reg_bits = IXGBE_VMD_CTL_VMDQ_EN | IXGBE_VT_CTL_REPLEN;
2829 vt_reg_bits |= (adapter->num_vfs << IXGBE_VT_CTL_POOL_SHIFT);
2830 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl | vt_reg_bits);
2831
2832 vf_shift = adapter->num_vfs % 32;
2833 reg_offset = (adapter->num_vfs >= 32) ? 1 : 0;
2834
2835 /* Enable only the PF's pool for Tx/Rx */
2836 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (1 << vf_shift));
2837 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), 0);
2838 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (1 << vf_shift));
2839 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), 0);
2840 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
2841
2842 /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
2843 hw->mac.ops.set_vmdq(hw, 0, adapter->num_vfs);
2844
2845 /*
2846 * Set up VF register offsets for selected VT Mode,
2847 * i.e. 32 or 64 VFs for SR-IOV
2848 */
2849 gcr_ext = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
2850 gcr_ext |= IXGBE_GCR_EXT_MSIX_EN;
2851 gcr_ext |= IXGBE_GCR_EXT_VT_MODE_64;
2852 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
2853
2854 /* enable Tx loopback for VF/PF communication */
2855 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
2856 /* Enable MAC Anti-Spoofing */
2857 hw->mac.ops.set_mac_anti_spoofing(hw,
2858 (adapter->num_vfs != 0),
2859 adapter->num_vfs);
2860 /* For VFs that have spoof checking turned off */
2861 for (i = 0; i < adapter->num_vfs; i++) {
2862 if (!adapter->vfinfo[i].spoofchk_enabled)
2863 ixgbe_ndo_set_vf_spoofchk(adapter->netdev, i, false);
2864 }
2865 }
2866
2867 static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
2868 {
2869 struct ixgbe_hw *hw = &adapter->hw;
2870 struct net_device *netdev = adapter->netdev;
2871 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2872 int rx_buf_len;
2873 struct ixgbe_ring *rx_ring;
2874 int i;
2875 u32 mhadd, hlreg0;
2876
2877 /* Decide whether to use packet split mode or not */
2878 /* On by default */
2879 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
2880
2881 /* Do not use packet split if we're in SR-IOV Mode */
2882 if (adapter->num_vfs)
2883 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
2884
2885 /* Disable packet split due to 82599 erratum #45 */
2886 if (hw->mac.type == ixgbe_mac_82599EB)
2887 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
2888
2889 #ifdef IXGBE_FCOE
2890 /* adjust max frame to be able to do baby jumbo for FCoE */
2891 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
2892 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
2893 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
2894
2895 #endif /* IXGBE_FCOE */
2896 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
2897 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
2898 mhadd &= ~IXGBE_MHADD_MFS_MASK;
2899 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
2900
2901 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
2902 }
2903
2904 /* MHADD will allow an extra 4 bytes past for vlan tagged frames */
2905 max_frame += VLAN_HLEN;
2906
2907 /* Set the RX buffer length according to the mode */
2908 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
2909 rx_buf_len = IXGBE_RX_HDR_SIZE;
2910 } else {
2911 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
2912 (netdev->mtu <= ETH_DATA_LEN))
2913 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
2914 /*
2915 * Make best use of allocation by using all but 1K of a
2916 * power of 2 allocation that will be used for skb->head.
2917 */
2918 else if (max_frame <= IXGBE_RXBUFFER_3K)
2919 rx_buf_len = IXGBE_RXBUFFER_3K;
2920 else if (max_frame <= IXGBE_RXBUFFER_7K)
2921 rx_buf_len = IXGBE_RXBUFFER_7K;
2922 else if (max_frame <= IXGBE_RXBUFFER_15K)
2923 rx_buf_len = IXGBE_RXBUFFER_15K;
2924 else
2925 rx_buf_len = IXGBE_MAX_RXBUFFER;
2926 }
2927
2928 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
2929 /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
2930 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2931 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
2932
2933 /*
2934 * Setup the HW Rx Head and Tail Descriptor Pointers and
2935 * the Base and Length of the Rx Descriptor Ring
2936 */
2937 for (i = 0; i < adapter->num_rx_queues; i++) {
2938 rx_ring = adapter->rx_ring[i];
2939 rx_ring->rx_buf_len = rx_buf_len;
2940
2941 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
2942 set_ring_ps_enabled(rx_ring);
2943 else
2944 clear_ring_ps_enabled(rx_ring);
2945
2946 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
2947 set_ring_rsc_enabled(rx_ring);
2948 else
2949 clear_ring_rsc_enabled(rx_ring);
2950
2951 #ifdef IXGBE_FCOE
2952 if (netdev->features & NETIF_F_FCOE_MTU) {
2953 struct ixgbe_ring_feature *f;
2954 f = &adapter->ring_feature[RING_F_FCOE];
2955 if ((i >= f->mask) && (i < f->mask + f->indices)) {
2956 clear_ring_ps_enabled(rx_ring);
2957 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
2958 rx_ring->rx_buf_len =
2959 IXGBE_FCOE_JUMBO_FRAME_SIZE;
2960 } else if (!ring_is_rsc_enabled(rx_ring) &&
2961 !ring_is_ps_enabled(rx_ring)) {
2962 rx_ring->rx_buf_len =
2963 IXGBE_FCOE_JUMBO_FRAME_SIZE;
2964 }
2965 }
2966 #endif /* IXGBE_FCOE */
2967 }
2968 }
2969
2970 static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
2971 {
2972 struct ixgbe_hw *hw = &adapter->hw;
2973 u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2974
2975 switch (hw->mac.type) {
2976 case ixgbe_mac_82598EB:
2977 /*
2978 * For VMDq support of different descriptor types or
2979 * buffer sizes through the use of multiple SRRCTL
2980 * registers, RDRXCTL.MVMEN must be set to 1
2981 *
2982 * also, the manual doesn't mention it clearly but DCA hints
2983 * will only use queue 0's tags unless this bit is set. Side
2984 * effects of setting this bit are only that SRRCTL must be
2985 * fully programmed [0..15]
2986 */
2987 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
2988 break;
2989 case ixgbe_mac_82599EB:
2990 case ixgbe_mac_X540:
2991 /* Disable RSC for ACK packets */
2992 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
2993 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
2994 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
2995 /* hardware requires some bits to be set by default */
2996 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
2997 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
2998 break;
2999 default:
3000 /* We should do nothing since we don't know this hardware */
3001 return;
3002 }
3003
3004 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
3005 }
3006
3007 /**
3008 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
3009 * @adapter: board private structure
3010 *
3011 * Configure the Rx unit of the MAC after a reset.
3012 **/
3013 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
3014 {
3015 struct ixgbe_hw *hw = &adapter->hw;
3016 int i;
3017 u32 rxctrl;
3018
3019 /* disable receives while setting up the descriptors */
3020 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3021 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3022
3023 ixgbe_setup_psrtype(adapter);
3024 ixgbe_setup_rdrxctl(adapter);
3025
3026 /* Program registers for the distribution of queues */
3027 ixgbe_setup_mrqc(adapter);
3028
3029 ixgbe_set_uta(adapter);
3030
3031 /* set_rx_buffer_len must be called before ring initialization */
3032 ixgbe_set_rx_buffer_len(adapter);
3033
3034 /*
3035 * Setup the HW Rx Head and Tail Descriptor Pointers and
3036 * the Base and Length of the Rx Descriptor Ring
3037 */
3038 for (i = 0; i < adapter->num_rx_queues; i++)
3039 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
3040
3041 /* disable drop enable for 82598 parts */
3042 if (hw->mac.type == ixgbe_mac_82598EB)
3043 rxctrl |= IXGBE_RXCTRL_DMBYPS;
3044
3045 /* enable all receives */
3046 rxctrl |= IXGBE_RXCTRL_RXEN;
3047 hw->mac.ops.enable_rx_dma(hw, rxctrl);
3048 }
3049
3050 static int ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
3051 {
3052 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3053 struct ixgbe_hw *hw = &adapter->hw;
3054 int pool_ndx = adapter->num_vfs;
3055
3056 /* add VID to filter table */
3057 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, true);
3058 set_bit(vid, adapter->active_vlans);
3059
3060 return 0;
3061 }
3062
3063 static int ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
3064 {
3065 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3066 struct ixgbe_hw *hw = &adapter->hw;
3067 int pool_ndx = adapter->num_vfs;
3068
3069 /* remove VID from filter table */
3070 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, false);
3071 clear_bit(vid, adapter->active_vlans);
3072
3073 return 0;
3074 }
3075
3076 /**
3077 * ixgbe_vlan_filter_disable - helper to disable hw vlan filtering
3078 * @adapter: driver data
3079 */
3080 static void ixgbe_vlan_filter_disable(struct ixgbe_adapter *adapter)
3081 {
3082 struct ixgbe_hw *hw = &adapter->hw;
3083 u32 vlnctrl;
3084
3085 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3086 vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
3087 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3088 }
3089
3090 /**
3091 * ixgbe_vlan_filter_enable - helper to enable hw vlan filtering
3092 * @adapter: driver data
3093 */
3094 static void ixgbe_vlan_filter_enable(struct ixgbe_adapter *adapter)
3095 {
3096 struct ixgbe_hw *hw = &adapter->hw;
3097 u32 vlnctrl;
3098
3099 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3100 vlnctrl |= IXGBE_VLNCTRL_VFE;
3101 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
3102 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3103 }
3104
3105 /**
3106 * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping
3107 * @adapter: driver data
3108 */
3109 static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
3110 {
3111 struct ixgbe_hw *hw = &adapter->hw;
3112 u32 vlnctrl;
3113 int i, j;
3114
3115 switch (hw->mac.type) {
3116 case ixgbe_mac_82598EB:
3117 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3118 vlnctrl &= ~IXGBE_VLNCTRL_VME;
3119 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3120 break;
3121 case ixgbe_mac_82599EB:
3122 case ixgbe_mac_X540:
3123 for (i = 0; i < adapter->num_rx_queues; i++) {
3124 j = adapter->rx_ring[i]->reg_idx;
3125 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3126 vlnctrl &= ~IXGBE_RXDCTL_VME;
3127 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3128 }
3129 break;
3130 default:
3131 break;
3132 }
3133 }
3134
3135 /**
3136 * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping
3137 * @adapter: driver data
3138 */
3139 static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
3140 {
3141 struct ixgbe_hw *hw = &adapter->hw;
3142 u32 vlnctrl;
3143 int i, j;
3144
3145 switch (hw->mac.type) {
3146 case ixgbe_mac_82598EB:
3147 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3148 vlnctrl |= IXGBE_VLNCTRL_VME;
3149 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3150 break;
3151 case ixgbe_mac_82599EB:
3152 case ixgbe_mac_X540:
3153 for (i = 0; i < adapter->num_rx_queues; i++) {
3154 j = adapter->rx_ring[i]->reg_idx;
3155 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3156 vlnctrl |= IXGBE_RXDCTL_VME;
3157 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3158 }
3159 break;
3160 default:
3161 break;
3162 }
3163 }
3164
3165 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
3166 {
3167 u16 vid;
3168
3169 ixgbe_vlan_rx_add_vid(adapter->netdev, 0);
3170
3171 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
3172 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
3173 }
3174
3175 /**
3176 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
3177 * @netdev: network interface device structure
3178 *
3179 * Writes unicast address list to the RAR table.
3180 * Returns: -ENOMEM on failure/insufficient address space
3181 * 0 on no addresses written
3182 * X on writing X addresses to the RAR table
3183 **/
3184 static int ixgbe_write_uc_addr_list(struct net_device *netdev)
3185 {
3186 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3187 struct ixgbe_hw *hw = &adapter->hw;
3188 unsigned int vfn = adapter->num_vfs;
3189 unsigned int rar_entries = IXGBE_MAX_PF_MACVLANS;
3190 int count = 0;
3191
3192 /* return ENOMEM indicating insufficient memory for addresses */
3193 if (netdev_uc_count(netdev) > rar_entries)
3194 return -ENOMEM;
3195
3196 if (!netdev_uc_empty(netdev) && rar_entries) {
3197 struct netdev_hw_addr *ha;
3198 /* return error if we do not support writing to RAR table */
3199 if (!hw->mac.ops.set_rar)
3200 return -ENOMEM;
3201
3202 netdev_for_each_uc_addr(ha, netdev) {
3203 if (!rar_entries)
3204 break;
3205 hw->mac.ops.set_rar(hw, rar_entries--, ha->addr,
3206 vfn, IXGBE_RAH_AV);
3207 count++;
3208 }
3209 }
3210 /* write the addresses in reverse order to avoid write combining */
3211 for (; rar_entries > 0 ; rar_entries--)
3212 hw->mac.ops.clear_rar(hw, rar_entries);
3213
3214 return count;
3215 }
3216
3217 /**
3218 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
3219 * @netdev: network interface device structure
3220 *
3221 * The set_rx_method entry point is called whenever the unicast/multicast
3222 * address list or the network interface flags are updated. This routine is
3223 * responsible for configuring the hardware for proper unicast, multicast and
3224 * promiscuous mode.
3225 **/
3226 void ixgbe_set_rx_mode(struct net_device *netdev)
3227 {
3228 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3229 struct ixgbe_hw *hw = &adapter->hw;
3230 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
3231 int count;
3232
3233 /* Check for Promiscuous and All Multicast modes */
3234
3235 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3236
3237 /* set all bits that we expect to always be set */
3238 fctrl |= IXGBE_FCTRL_BAM;
3239 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
3240 fctrl |= IXGBE_FCTRL_PMCF;
3241
3242 /* clear the bits we are changing the status of */
3243 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3244
3245 if (netdev->flags & IFF_PROMISC) {
3246 hw->addr_ctrl.user_set_promisc = true;
3247 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3248 vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_MPE);
3249 /* don't hardware filter vlans in promisc mode */
3250 ixgbe_vlan_filter_disable(adapter);
3251 } else {
3252 if (netdev->flags & IFF_ALLMULTI) {
3253 fctrl |= IXGBE_FCTRL_MPE;
3254 vmolr |= IXGBE_VMOLR_MPE;
3255 } else {
3256 /*
3257 * Write addresses to the MTA, if the attempt fails
3258 * then we should just turn on promiscuous mode so
3259 * that we can at least receive multicast traffic
3260 */
3261 hw->mac.ops.update_mc_addr_list(hw, netdev);
3262 vmolr |= IXGBE_VMOLR_ROMPE;
3263 }
3264 ixgbe_vlan_filter_enable(adapter);
3265 hw->addr_ctrl.user_set_promisc = false;
3266 /*
3267 * Write addresses to available RAR registers, if there is not
3268 * sufficient space to store all the addresses then enable
3269 * unicast promiscuous mode
3270 */
3271 count = ixgbe_write_uc_addr_list(netdev);
3272 if (count < 0) {
3273 fctrl |= IXGBE_FCTRL_UPE;
3274 vmolr |= IXGBE_VMOLR_ROPE;
3275 }
3276 }
3277
3278 if (adapter->num_vfs) {
3279 ixgbe_restore_vf_multicasts(adapter);
3280 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(adapter->num_vfs)) &
3281 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
3282 IXGBE_VMOLR_ROPE);
3283 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(adapter->num_vfs), vmolr);
3284 }
3285
3286 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
3287
3288 if (netdev->features & NETIF_F_HW_VLAN_RX)
3289 ixgbe_vlan_strip_enable(adapter);
3290 else
3291 ixgbe_vlan_strip_disable(adapter);
3292 }
3293
3294 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
3295 {
3296 int q_idx;
3297 struct ixgbe_q_vector *q_vector;
3298 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3299
3300 /* legacy and MSI only use one vector */
3301 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3302 q_vectors = 1;
3303
3304 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3305 q_vector = adapter->q_vector[q_idx];
3306 napi_enable(&q_vector->napi);
3307 }
3308 }
3309
3310 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
3311 {
3312 int q_idx;
3313 struct ixgbe_q_vector *q_vector;
3314 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3315
3316 /* legacy and MSI only use one vector */
3317 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3318 q_vectors = 1;
3319
3320 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3321 q_vector = adapter->q_vector[q_idx];
3322 napi_disable(&q_vector->napi);
3323 }
3324 }
3325
3326 #ifdef CONFIG_IXGBE_DCB
3327 /*
3328 * ixgbe_configure_dcb - Configure DCB hardware
3329 * @adapter: ixgbe adapter struct
3330 *
3331 * This is called by the driver on open to configure the DCB hardware.
3332 * This is also called by the gennetlink interface when reconfiguring
3333 * the DCB state.
3334 */
3335 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
3336 {
3337 struct ixgbe_hw *hw = &adapter->hw;
3338 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3339
3340 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
3341 if (hw->mac.type == ixgbe_mac_82598EB)
3342 netif_set_gso_max_size(adapter->netdev, 65536);
3343 return;
3344 }
3345
3346 if (hw->mac.type == ixgbe_mac_82598EB)
3347 netif_set_gso_max_size(adapter->netdev, 32768);
3348
3349
3350 /* Enable VLAN tag insert/strip */
3351 adapter->netdev->features |= NETIF_F_HW_VLAN_RX;
3352
3353 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
3354
3355 #ifdef IXGBE_FCOE
3356 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
3357 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
3358 #endif
3359
3360 /* reconfigure the hardware */
3361 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE) {
3362 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3363 DCB_TX_CONFIG);
3364 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3365 DCB_RX_CONFIG);
3366 ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
3367 } else if (adapter->ixgbe_ieee_ets && adapter->ixgbe_ieee_pfc) {
3368 ixgbe_dcb_hw_ets(&adapter->hw,
3369 adapter->ixgbe_ieee_ets,
3370 max_frame);
3371 ixgbe_dcb_hw_pfc_config(&adapter->hw,
3372 adapter->ixgbe_ieee_pfc->pfc_en,
3373 adapter->ixgbe_ieee_ets->prio_tc);
3374 }
3375
3376 /* Enable RSS Hash per TC */
3377 if (hw->mac.type != ixgbe_mac_82598EB) {
3378 int i;
3379 u32 reg = 0;
3380
3381 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
3382 u8 msb = 0;
3383 u8 cnt = adapter->netdev->tc_to_txq[i].count;
3384
3385 while (cnt >>= 1)
3386 msb++;
3387
3388 reg |= msb << IXGBE_RQTC_SHIFT_TC(i);
3389 }
3390 IXGBE_WRITE_REG(hw, IXGBE_RQTC, reg);
3391 }
3392 }
3393 #endif
3394
3395 /* Additional bittime to account for IXGBE framing */
3396 #define IXGBE_ETH_FRAMING 20
3397
3398 /*
3399 * ixgbe_hpbthresh - calculate high water mark for flow control
3400 *
3401 * @adapter: board private structure to calculate for
3402 * @pb - packet buffer to calculate
3403 */
3404 static int ixgbe_hpbthresh(struct ixgbe_adapter *adapter, int pb)
3405 {
3406 struct ixgbe_hw *hw = &adapter->hw;
3407 struct net_device *dev = adapter->netdev;
3408 int link, tc, kb, marker;
3409 u32 dv_id, rx_pba;
3410
3411 /* Calculate max LAN frame size */
3412 tc = link = dev->mtu + ETH_HLEN + ETH_FCS_LEN + IXGBE_ETH_FRAMING;
3413
3414 #ifdef IXGBE_FCOE
3415 /* FCoE traffic class uses FCOE jumbo frames */
3416 if (dev->features & NETIF_F_FCOE_MTU) {
3417 int fcoe_pb = 0;
3418
3419 #ifdef CONFIG_IXGBE_DCB
3420 fcoe_pb = netdev_get_prio_tc_map(dev, adapter->fcoe.up);
3421
3422 #endif
3423 if (fcoe_pb == pb && tc < IXGBE_FCOE_JUMBO_FRAME_SIZE)
3424 tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
3425 }
3426 #endif
3427
3428 /* Calculate delay value for device */
3429 switch (hw->mac.type) {
3430 case ixgbe_mac_X540:
3431 dv_id = IXGBE_DV_X540(link, tc);
3432 break;
3433 default:
3434 dv_id = IXGBE_DV(link, tc);
3435 break;
3436 }
3437
3438 /* Loopback switch introduces additional latency */
3439 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3440 dv_id += IXGBE_B2BT(tc);
3441
3442 /* Delay value is calculated in bit times convert to KB */
3443 kb = IXGBE_BT2KB(dv_id);
3444 rx_pba = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(pb)) >> 10;
3445
3446 marker = rx_pba - kb;
3447
3448 /* It is possible that the packet buffer is not large enough
3449 * to provide required headroom. In this case throw an error
3450 * to user and a do the best we can.
3451 */
3452 if (marker < 0) {
3453 e_warn(drv, "Packet Buffer(%i) can not provide enough"
3454 "headroom to support flow control."
3455 "Decrease MTU or number of traffic classes\n", pb);
3456 marker = tc + 1;
3457 }
3458
3459 return marker;
3460 }
3461
3462 /*
3463 * ixgbe_lpbthresh - calculate low water mark for for flow control
3464 *
3465 * @adapter: board private structure to calculate for
3466 * @pb - packet buffer to calculate
3467 */
3468 static int ixgbe_lpbthresh(struct ixgbe_adapter *adapter)
3469 {
3470 struct ixgbe_hw *hw = &adapter->hw;
3471 struct net_device *dev = adapter->netdev;
3472 int tc;
3473 u32 dv_id;
3474
3475 /* Calculate max LAN frame size */
3476 tc = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
3477
3478 /* Calculate delay value for device */
3479 switch (hw->mac.type) {
3480 case ixgbe_mac_X540:
3481 dv_id = IXGBE_LOW_DV_X540(tc);
3482 break;
3483 default:
3484 dv_id = IXGBE_LOW_DV(tc);
3485 break;
3486 }
3487
3488 /* Delay value is calculated in bit times convert to KB */
3489 return IXGBE_BT2KB(dv_id);
3490 }
3491
3492 /*
3493 * ixgbe_pbthresh_setup - calculate and setup high low water marks
3494 */
3495 static void ixgbe_pbthresh_setup(struct ixgbe_adapter *adapter)
3496 {
3497 struct ixgbe_hw *hw = &adapter->hw;
3498 int num_tc = netdev_get_num_tc(adapter->netdev);
3499 int i;
3500
3501 if (!num_tc)
3502 num_tc = 1;
3503
3504 hw->fc.low_water = ixgbe_lpbthresh(adapter);
3505
3506 for (i = 0; i < num_tc; i++) {
3507 hw->fc.high_water[i] = ixgbe_hpbthresh(adapter, i);
3508
3509 /* Low water marks must not be larger than high water marks */
3510 if (hw->fc.low_water > hw->fc.high_water[i])
3511 hw->fc.low_water = 0;
3512 }
3513 }
3514
3515 static void ixgbe_configure_pb(struct ixgbe_adapter *adapter)
3516 {
3517 struct ixgbe_hw *hw = &adapter->hw;
3518 int hdrm;
3519 u8 tc = netdev_get_num_tc(adapter->netdev);
3520
3521 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3522 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
3523 hdrm = 32 << adapter->fdir_pballoc;
3524 else
3525 hdrm = 0;
3526
3527 hw->mac.ops.set_rxpba(hw, tc, hdrm, PBA_STRATEGY_EQUAL);
3528 ixgbe_pbthresh_setup(adapter);
3529 }
3530
3531 static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
3532 {
3533 struct ixgbe_hw *hw = &adapter->hw;
3534 struct hlist_node *node, *node2;
3535 struct ixgbe_fdir_filter *filter;
3536
3537 spin_lock(&adapter->fdir_perfect_lock);
3538
3539 if (!hlist_empty(&adapter->fdir_filter_list))
3540 ixgbe_fdir_set_input_mask_82599(hw, &adapter->fdir_mask);
3541
3542 hlist_for_each_entry_safe(filter, node, node2,
3543 &adapter->fdir_filter_list, fdir_node) {
3544 ixgbe_fdir_write_perfect_filter_82599(hw,
3545 &filter->filter,
3546 filter->sw_idx,
3547 (filter->action == IXGBE_FDIR_DROP_QUEUE) ?
3548 IXGBE_FDIR_DROP_QUEUE :
3549 adapter->rx_ring[filter->action]->reg_idx);
3550 }
3551
3552 spin_unlock(&adapter->fdir_perfect_lock);
3553 }
3554
3555 static void ixgbe_configure(struct ixgbe_adapter *adapter)
3556 {
3557 ixgbe_configure_pb(adapter);
3558 #ifdef CONFIG_IXGBE_DCB
3559 ixgbe_configure_dcb(adapter);
3560 #endif
3561
3562 ixgbe_set_rx_mode(adapter->netdev);
3563 ixgbe_restore_vlan(adapter);
3564
3565 #ifdef IXGBE_FCOE
3566 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
3567 ixgbe_configure_fcoe(adapter);
3568
3569 #endif /* IXGBE_FCOE */
3570 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3571 ixgbe_init_fdir_signature_82599(&adapter->hw,
3572 adapter->fdir_pballoc);
3573 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
3574 ixgbe_init_fdir_perfect_82599(&adapter->hw,
3575 adapter->fdir_pballoc);
3576 ixgbe_fdir_filter_restore(adapter);
3577 }
3578
3579 ixgbe_configure_virtualization(adapter);
3580
3581 ixgbe_configure_tx(adapter);
3582 ixgbe_configure_rx(adapter);
3583 }
3584
3585 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
3586 {
3587 switch (hw->phy.type) {
3588 case ixgbe_phy_sfp_avago:
3589 case ixgbe_phy_sfp_ftl:
3590 case ixgbe_phy_sfp_intel:
3591 case ixgbe_phy_sfp_unknown:
3592 case ixgbe_phy_sfp_passive_tyco:
3593 case ixgbe_phy_sfp_passive_unknown:
3594 case ixgbe_phy_sfp_active_unknown:
3595 case ixgbe_phy_sfp_ftl_active:
3596 return true;
3597 case ixgbe_phy_nl:
3598 if (hw->mac.type == ixgbe_mac_82598EB)
3599 return true;
3600 default:
3601 return false;
3602 }
3603 }
3604
3605 /**
3606 * ixgbe_sfp_link_config - set up SFP+ link
3607 * @adapter: pointer to private adapter struct
3608 **/
3609 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
3610 {
3611 /*
3612 * We are assuming the worst case scenario here, and that
3613 * is that an SFP was inserted/removed after the reset
3614 * but before SFP detection was enabled. As such the best
3615 * solution is to just start searching as soon as we start
3616 */
3617 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
3618 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
3619
3620 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
3621 }
3622
3623 /**
3624 * ixgbe_non_sfp_link_config - set up non-SFP+ link
3625 * @hw: pointer to private hardware struct
3626 *
3627 * Returns 0 on success, negative on failure
3628 **/
3629 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
3630 {
3631 u32 autoneg;
3632 bool negotiation, link_up = false;
3633 u32 ret = IXGBE_ERR_LINK_SETUP;
3634
3635 if (hw->mac.ops.check_link)
3636 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
3637
3638 if (ret)
3639 goto link_cfg_out;
3640
3641 autoneg = hw->phy.autoneg_advertised;
3642 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
3643 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg,
3644 &negotiation);
3645 if (ret)
3646 goto link_cfg_out;
3647
3648 if (hw->mac.ops.setup_link)
3649 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
3650 link_cfg_out:
3651 return ret;
3652 }
3653
3654 static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
3655 {
3656 struct ixgbe_hw *hw = &adapter->hw;
3657 u32 gpie = 0;
3658
3659 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3660 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
3661 IXGBE_GPIE_OCD;
3662 gpie |= IXGBE_GPIE_EIAME;
3663 /*
3664 * use EIAM to auto-mask when MSI-X interrupt is asserted
3665 * this saves a register write for every interrupt
3666 */
3667 switch (hw->mac.type) {
3668 case ixgbe_mac_82598EB:
3669 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3670 break;
3671 case ixgbe_mac_82599EB:
3672 case ixgbe_mac_X540:
3673 default:
3674 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
3675 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
3676 break;
3677 }
3678 } else {
3679 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
3680 * specifically only auto mask tx and rx interrupts */
3681 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3682 }
3683
3684 /* XXX: to interrupt immediately for EICS writes, enable this */
3685 /* gpie |= IXGBE_GPIE_EIMEN; */
3686
3687 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3688 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
3689 gpie |= IXGBE_GPIE_VTMODE_64;
3690 }
3691
3692 /* Enable Thermal over heat sensor interrupt */
3693 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
3694 switch (adapter->hw.mac.type) {
3695 case ixgbe_mac_82599EB:
3696 gpie |= IXGBE_SDP0_GPIEN;
3697 break;
3698 case ixgbe_mac_X540:
3699 gpie |= IXGBE_EIMS_TS;
3700 break;
3701 default:
3702 break;
3703 }
3704 }
3705
3706 /* Enable fan failure interrupt */
3707 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
3708 gpie |= IXGBE_SDP1_GPIEN;
3709
3710 if (hw->mac.type == ixgbe_mac_82599EB) {
3711 gpie |= IXGBE_SDP1_GPIEN;
3712 gpie |= IXGBE_SDP2_GPIEN;
3713 }
3714
3715 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3716 }
3717
3718 static void ixgbe_up_complete(struct ixgbe_adapter *adapter)
3719 {
3720 struct ixgbe_hw *hw = &adapter->hw;
3721 int err;
3722 u32 ctrl_ext;
3723
3724 ixgbe_get_hw_control(adapter);
3725 ixgbe_setup_gpie(adapter);
3726
3727 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3728 ixgbe_configure_msix(adapter);
3729 else
3730 ixgbe_configure_msi_and_legacy(adapter);
3731
3732 /* enable the optics for both mult-speed fiber and 82599 SFP+ fiber */
3733 if (hw->mac.ops.enable_tx_laser &&
3734 ((hw->phy.multispeed_fiber) ||
3735 ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
3736 (hw->mac.type == ixgbe_mac_82599EB))))
3737 hw->mac.ops.enable_tx_laser(hw);
3738
3739 clear_bit(__IXGBE_DOWN, &adapter->state);
3740 ixgbe_napi_enable_all(adapter);
3741
3742 if (ixgbe_is_sfp(hw)) {
3743 ixgbe_sfp_link_config(adapter);
3744 } else {
3745 err = ixgbe_non_sfp_link_config(hw);
3746 if (err)
3747 e_err(probe, "link_config FAILED %d\n", err);
3748 }
3749
3750 /* clear any pending interrupts, may auto mask */
3751 IXGBE_READ_REG(hw, IXGBE_EICR);
3752 ixgbe_irq_enable(adapter, true, true);
3753
3754 /*
3755 * If this adapter has a fan, check to see if we had a failure
3756 * before we enabled the interrupt.
3757 */
3758 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
3759 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
3760 if (esdp & IXGBE_ESDP_SDP1)
3761 e_crit(drv, "Fan has stopped, replace the adapter\n");
3762 }
3763
3764 /* enable transmits */
3765 netif_tx_start_all_queues(adapter->netdev);
3766
3767 /* bring the link up in the watchdog, this could race with our first
3768 * link up interrupt but shouldn't be a problem */
3769 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
3770 adapter->link_check_timeout = jiffies;
3771 mod_timer(&adapter->service_timer, jiffies);
3772
3773 /* Set PF Reset Done bit so PF/VF Mail Ops can work */
3774 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
3775 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
3776 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
3777 }
3778
3779 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
3780 {
3781 WARN_ON(in_interrupt());
3782 /* put off any impending NetWatchDogTimeout */
3783 adapter->netdev->trans_start = jiffies;
3784
3785 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
3786 usleep_range(1000, 2000);
3787 ixgbe_down(adapter);
3788 /*
3789 * If SR-IOV enabled then wait a bit before bringing the adapter
3790 * back up to give the VFs time to respond to the reset. The
3791 * two second wait is based upon the watchdog timer cycle in
3792 * the VF driver.
3793 */
3794 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3795 msleep(2000);
3796 ixgbe_up(adapter);
3797 clear_bit(__IXGBE_RESETTING, &adapter->state);
3798 }
3799
3800 void ixgbe_up(struct ixgbe_adapter *adapter)
3801 {
3802 /* hardware has been reset, we need to reload some things */
3803 ixgbe_configure(adapter);
3804
3805 ixgbe_up_complete(adapter);
3806 }
3807
3808 void ixgbe_reset(struct ixgbe_adapter *adapter)
3809 {
3810 struct ixgbe_hw *hw = &adapter->hw;
3811 int err;
3812
3813 /* lock SFP init bit to prevent race conditions with the watchdog */
3814 while (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
3815 usleep_range(1000, 2000);
3816
3817 /* clear all SFP and link config related flags while holding SFP_INIT */
3818 adapter->flags2 &= ~(IXGBE_FLAG2_SEARCH_FOR_SFP |
3819 IXGBE_FLAG2_SFP_NEEDS_RESET);
3820 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
3821
3822 err = hw->mac.ops.init_hw(hw);
3823 switch (err) {
3824 case 0:
3825 case IXGBE_ERR_SFP_NOT_PRESENT:
3826 case IXGBE_ERR_SFP_NOT_SUPPORTED:
3827 break;
3828 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
3829 e_dev_err("master disable timed out\n");
3830 break;
3831 case IXGBE_ERR_EEPROM_VERSION:
3832 /* We are running on a pre-production device, log a warning */
3833 e_dev_warn("This device is a pre-production adapter/LOM. "
3834 "Please be aware there may be issues associated with "
3835 "your hardware. If you are experiencing problems "
3836 "please contact your Intel or hardware "
3837 "representative who provided you with this "
3838 "hardware.\n");
3839 break;
3840 default:
3841 e_dev_err("Hardware Error: %d\n", err);
3842 }
3843
3844 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
3845
3846 /* reprogram the RAR[0] in case user changed it. */
3847 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
3848 IXGBE_RAH_AV);
3849 }
3850
3851 /**
3852 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
3853 * @rx_ring: ring to free buffers from
3854 **/
3855 static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring)
3856 {
3857 struct device *dev = rx_ring->dev;
3858 unsigned long size;
3859 u16 i;
3860
3861 /* ring already cleared, nothing to do */
3862 if (!rx_ring->rx_buffer_info)
3863 return;
3864
3865 /* Free all the Rx ring sk_buffs */
3866 for (i = 0; i < rx_ring->count; i++) {
3867 struct ixgbe_rx_buffer *rx_buffer_info;
3868
3869 rx_buffer_info = &rx_ring->rx_buffer_info[i];
3870 if (rx_buffer_info->dma) {
3871 dma_unmap_single(rx_ring->dev, rx_buffer_info->dma,
3872 rx_ring->rx_buf_len,
3873 DMA_FROM_DEVICE);
3874 rx_buffer_info->dma = 0;
3875 }
3876 if (rx_buffer_info->skb) {
3877 struct sk_buff *skb = rx_buffer_info->skb;
3878 rx_buffer_info->skb = NULL;
3879 do {
3880 struct sk_buff *this = skb;
3881 if (IXGBE_RSC_CB(this)->delay_unmap) {
3882 dma_unmap_single(dev,
3883 IXGBE_RSC_CB(this)->dma,
3884 rx_ring->rx_buf_len,
3885 DMA_FROM_DEVICE);
3886 IXGBE_RSC_CB(this)->dma = 0;
3887 IXGBE_RSC_CB(skb)->delay_unmap = false;
3888 }
3889 skb = skb->prev;
3890 dev_kfree_skb(this);
3891 } while (skb);
3892 }
3893 if (!rx_buffer_info->page)
3894 continue;
3895 if (rx_buffer_info->page_dma) {
3896 dma_unmap_page(dev, rx_buffer_info->page_dma,
3897 PAGE_SIZE / 2, DMA_FROM_DEVICE);
3898 rx_buffer_info->page_dma = 0;
3899 }
3900 put_page(rx_buffer_info->page);
3901 rx_buffer_info->page = NULL;
3902 rx_buffer_info->page_offset = 0;
3903 }
3904
3905 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
3906 memset(rx_ring->rx_buffer_info, 0, size);
3907
3908 /* Zero out the descriptor ring */
3909 memset(rx_ring->desc, 0, rx_ring->size);
3910
3911 rx_ring->next_to_clean = 0;
3912 rx_ring->next_to_use = 0;
3913 }
3914
3915 /**
3916 * ixgbe_clean_tx_ring - Free Tx Buffers
3917 * @tx_ring: ring to be cleaned
3918 **/
3919 static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
3920 {
3921 struct ixgbe_tx_buffer *tx_buffer_info;
3922 unsigned long size;
3923 u16 i;
3924
3925 /* ring already cleared, nothing to do */
3926 if (!tx_ring->tx_buffer_info)
3927 return;
3928
3929 /* Free all the Tx ring sk_buffs */
3930 for (i = 0; i < tx_ring->count; i++) {
3931 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3932 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
3933 }
3934
3935 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
3936 memset(tx_ring->tx_buffer_info, 0, size);
3937
3938 /* Zero out the descriptor ring */
3939 memset(tx_ring->desc, 0, tx_ring->size);
3940
3941 tx_ring->next_to_use = 0;
3942 tx_ring->next_to_clean = 0;
3943 }
3944
3945 /**
3946 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
3947 * @adapter: board private structure
3948 **/
3949 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
3950 {
3951 int i;
3952
3953 for (i = 0; i < adapter->num_rx_queues; i++)
3954 ixgbe_clean_rx_ring(adapter->rx_ring[i]);
3955 }
3956
3957 /**
3958 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
3959 * @adapter: board private structure
3960 **/
3961 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
3962 {
3963 int i;
3964
3965 for (i = 0; i < adapter->num_tx_queues; i++)
3966 ixgbe_clean_tx_ring(adapter->tx_ring[i]);
3967 }
3968
3969 static void ixgbe_fdir_filter_exit(struct ixgbe_adapter *adapter)
3970 {
3971 struct hlist_node *node, *node2;
3972 struct ixgbe_fdir_filter *filter;
3973
3974 spin_lock(&adapter->fdir_perfect_lock);
3975
3976 hlist_for_each_entry_safe(filter, node, node2,
3977 &adapter->fdir_filter_list, fdir_node) {
3978 hlist_del(&filter->fdir_node);
3979 kfree(filter);
3980 }
3981 adapter->fdir_filter_count = 0;
3982
3983 spin_unlock(&adapter->fdir_perfect_lock);
3984 }
3985
3986 void ixgbe_down(struct ixgbe_adapter *adapter)
3987 {
3988 struct net_device *netdev = adapter->netdev;
3989 struct ixgbe_hw *hw = &adapter->hw;
3990 u32 rxctrl;
3991 int i;
3992
3993 /* signal that we are down to the interrupt handler */
3994 set_bit(__IXGBE_DOWN, &adapter->state);
3995
3996 /* disable receives */
3997 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3998 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3999
4000 /* disable all enabled rx queues */
4001 for (i = 0; i < adapter->num_rx_queues; i++)
4002 /* this call also flushes the previous write */
4003 ixgbe_disable_rx_queue(adapter, adapter->rx_ring[i]);
4004
4005 usleep_range(10000, 20000);
4006
4007 netif_tx_stop_all_queues(netdev);
4008
4009 /* call carrier off first to avoid false dev_watchdog timeouts */
4010 netif_carrier_off(netdev);
4011 netif_tx_disable(netdev);
4012
4013 ixgbe_irq_disable(adapter);
4014
4015 ixgbe_napi_disable_all(adapter);
4016
4017 adapter->flags2 &= ~(IXGBE_FLAG2_FDIR_REQUIRES_REINIT |
4018 IXGBE_FLAG2_RESET_REQUESTED);
4019 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
4020
4021 del_timer_sync(&adapter->service_timer);
4022
4023 if (adapter->num_vfs) {
4024 /* Clear EITR Select mapping */
4025 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
4026
4027 /* Mark all the VFs as inactive */
4028 for (i = 0 ; i < adapter->num_vfs; i++)
4029 adapter->vfinfo[i].clear_to_send = false;
4030
4031 /* ping all the active vfs to let them know we are going down */
4032 ixgbe_ping_all_vfs(adapter);
4033
4034 /* Disable all VFTE/VFRE TX/RX */
4035 ixgbe_disable_tx_rx(adapter);
4036 }
4037
4038 /* disable transmits in the hardware now that interrupts are off */
4039 for (i = 0; i < adapter->num_tx_queues; i++) {
4040 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
4041 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
4042 }
4043
4044 /* Disable the Tx DMA engine on 82599 and X540 */
4045 switch (hw->mac.type) {
4046 case ixgbe_mac_82599EB:
4047 case ixgbe_mac_X540:
4048 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
4049 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
4050 ~IXGBE_DMATXCTL_TE));
4051 break;
4052 default:
4053 break;
4054 }
4055
4056 if (!pci_channel_offline(adapter->pdev))
4057 ixgbe_reset(adapter);
4058
4059 /* power down the optics for multispeed fiber and 82599 SFP+ fiber */
4060 if (hw->mac.ops.disable_tx_laser &&
4061 ((hw->phy.multispeed_fiber) ||
4062 ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
4063 (hw->mac.type == ixgbe_mac_82599EB))))
4064 hw->mac.ops.disable_tx_laser(hw);
4065
4066 ixgbe_clean_all_tx_rings(adapter);
4067 ixgbe_clean_all_rx_rings(adapter);
4068
4069 #ifdef CONFIG_IXGBE_DCA
4070 /* since we reset the hardware DCA settings were cleared */
4071 ixgbe_setup_dca(adapter);
4072 #endif
4073 }
4074
4075 /**
4076 * ixgbe_poll - NAPI Rx polling callback
4077 * @napi: structure for representing this polling device
4078 * @budget: how many packets driver is allowed to clean
4079 *
4080 * This function is used for legacy and MSI, NAPI mode
4081 **/
4082 static int ixgbe_poll(struct napi_struct *napi, int budget)
4083 {
4084 struct ixgbe_q_vector *q_vector =
4085 container_of(napi, struct ixgbe_q_vector, napi);
4086 struct ixgbe_adapter *adapter = q_vector->adapter;
4087 struct ixgbe_ring *ring;
4088 int per_ring_budget;
4089 bool clean_complete = true;
4090
4091 #ifdef CONFIG_IXGBE_DCA
4092 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
4093 ixgbe_update_dca(q_vector);
4094 #endif
4095
4096 for (ring = q_vector->tx.ring; ring != NULL; ring = ring->next)
4097 clean_complete &= !!ixgbe_clean_tx_irq(q_vector, ring);
4098
4099 /* attempt to distribute budget to each queue fairly, but don't allow
4100 * the budget to go below 1 because we'll exit polling */
4101 if (q_vector->rx.count > 1)
4102 per_ring_budget = max(budget/q_vector->rx.count, 1);
4103 else
4104 per_ring_budget = budget;
4105
4106 for (ring = q_vector->rx.ring; ring != NULL; ring = ring->next)
4107 clean_complete &= ixgbe_clean_rx_irq(q_vector, ring,
4108 per_ring_budget);
4109
4110 /* If all work not completed, return budget and keep polling */
4111 if (!clean_complete)
4112 return budget;
4113
4114 /* all work done, exit the polling mode */
4115 napi_complete(napi);
4116 if (adapter->rx_itr_setting & 1)
4117 ixgbe_set_itr(q_vector);
4118 if (!test_bit(__IXGBE_DOWN, &adapter->state))
4119 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
4120
4121 return 0;
4122 }
4123
4124 /**
4125 * ixgbe_tx_timeout - Respond to a Tx Hang
4126 * @netdev: network interface device structure
4127 **/
4128 static void ixgbe_tx_timeout(struct net_device *netdev)
4129 {
4130 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4131
4132 /* Do the reset outside of interrupt context */
4133 ixgbe_tx_timeout_reset(adapter);
4134 }
4135
4136 /**
4137 * ixgbe_set_rss_queues: Allocate queues for RSS
4138 * @adapter: board private structure to initialize
4139 *
4140 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
4141 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
4142 *
4143 **/
4144 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
4145 {
4146 bool ret = false;
4147 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
4148
4149 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4150 f->mask = 0xF;
4151 adapter->num_rx_queues = f->indices;
4152 adapter->num_tx_queues = f->indices;
4153 ret = true;
4154 } else {
4155 ret = false;
4156 }
4157
4158 return ret;
4159 }
4160
4161 /**
4162 * ixgbe_set_fdir_queues: Allocate queues for Flow Director
4163 * @adapter: board private structure to initialize
4164 *
4165 * Flow Director is an advanced Rx filter, attempting to get Rx flows back
4166 * to the original CPU that initiated the Tx session. This runs in addition
4167 * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
4168 * Rx load across CPUs using RSS.
4169 *
4170 **/
4171 static inline bool ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
4172 {
4173 bool ret = false;
4174 struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
4175
4176 f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
4177 f_fdir->mask = 0;
4178
4179 /* Flow Director must have RSS enabled */
4180 if ((adapter->flags & IXGBE_FLAG_RSS_ENABLED) &&
4181 (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)) {
4182 adapter->num_tx_queues = f_fdir->indices;
4183 adapter->num_rx_queues = f_fdir->indices;
4184 ret = true;
4185 } else {
4186 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4187 }
4188 return ret;
4189 }
4190
4191 #ifdef IXGBE_FCOE
4192 /**
4193 * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
4194 * @adapter: board private structure to initialize
4195 *
4196 * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
4197 * The ring feature mask is not used as a mask for FCoE, as it can take any 8
4198 * rx queues out of the max number of rx queues, instead, it is used as the
4199 * index of the first rx queue used by FCoE.
4200 *
4201 **/
4202 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
4203 {
4204 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4205
4206 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
4207 return false;
4208
4209 f->indices = min((int)num_online_cpus(), f->indices);
4210
4211 adapter->num_rx_queues = 1;
4212 adapter->num_tx_queues = 1;
4213
4214 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4215 e_info(probe, "FCoE enabled with RSS\n");
4216 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
4217 ixgbe_set_fdir_queues(adapter);
4218 else
4219 ixgbe_set_rss_queues(adapter);
4220 }
4221
4222 /* adding FCoE rx rings to the end */
4223 f->mask = adapter->num_rx_queues;
4224 adapter->num_rx_queues += f->indices;
4225 adapter->num_tx_queues += f->indices;
4226
4227 return true;
4228 }
4229 #endif /* IXGBE_FCOE */
4230
4231 /* Artificial max queue cap per traffic class in DCB mode */
4232 #define DCB_QUEUE_CAP 8
4233
4234 #ifdef CONFIG_IXGBE_DCB
4235 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
4236 {
4237 int per_tc_q, q, i, offset = 0;
4238 struct net_device *dev = adapter->netdev;
4239 int tcs = netdev_get_num_tc(dev);
4240
4241 if (!tcs)
4242 return false;
4243
4244 /* Map queue offset and counts onto allocated tx queues */
4245 per_tc_q = min(dev->num_tx_queues / tcs, (unsigned int)DCB_QUEUE_CAP);
4246 q = min((int)num_online_cpus(), per_tc_q);
4247
4248 for (i = 0; i < tcs; i++) {
4249 netdev_set_tc_queue(dev, i, q, offset);
4250 offset += q;
4251 }
4252
4253 adapter->num_tx_queues = q * tcs;
4254 adapter->num_rx_queues = q * tcs;
4255
4256 #ifdef IXGBE_FCOE
4257 /* FCoE enabled queues require special configuration indexed
4258 * by feature specific indices and mask. Here we map FCoE
4259 * indices onto the DCB queue pairs allowing FCoE to own
4260 * configuration later.
4261 */
4262 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
4263 int tc;
4264 struct ixgbe_ring_feature *f =
4265 &adapter->ring_feature[RING_F_FCOE];
4266
4267 tc = netdev_get_prio_tc_map(dev, adapter->fcoe.up);
4268 f->indices = dev->tc_to_txq[tc].count;
4269 f->mask = dev->tc_to_txq[tc].offset;
4270 }
4271 #endif
4272
4273 return true;
4274 }
4275 #endif
4276
4277 /**
4278 * ixgbe_set_sriov_queues: Allocate queues for IOV use
4279 * @adapter: board private structure to initialize
4280 *
4281 * IOV doesn't actually use anything, so just NAK the
4282 * request for now and let the other queue routines
4283 * figure out what to do.
4284 */
4285 static inline bool ixgbe_set_sriov_queues(struct ixgbe_adapter *adapter)
4286 {
4287 return false;
4288 }
4289
4290 /*
4291 * ixgbe_set_num_queues: Allocate queues for device, feature dependent
4292 * @adapter: board private structure to initialize
4293 *
4294 * This is the top level queue allocation routine. The order here is very
4295 * important, starting with the "most" number of features turned on at once,
4296 * and ending with the smallest set of features. This way large combinations
4297 * can be allocated if they're turned on, and smaller combinations are the
4298 * fallthrough conditions.
4299 *
4300 **/
4301 static int ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
4302 {
4303 /* Start with base case */
4304 adapter->num_rx_queues = 1;
4305 adapter->num_tx_queues = 1;
4306 adapter->num_rx_pools = adapter->num_rx_queues;
4307 adapter->num_rx_queues_per_pool = 1;
4308
4309 if (ixgbe_set_sriov_queues(adapter))
4310 goto done;
4311
4312 #ifdef CONFIG_IXGBE_DCB
4313 if (ixgbe_set_dcb_queues(adapter))
4314 goto done;
4315
4316 #endif
4317 #ifdef IXGBE_FCOE
4318 if (ixgbe_set_fcoe_queues(adapter))
4319 goto done;
4320
4321 #endif /* IXGBE_FCOE */
4322 if (ixgbe_set_fdir_queues(adapter))
4323 goto done;
4324
4325 if (ixgbe_set_rss_queues(adapter))
4326 goto done;
4327
4328 /* fallback to base case */
4329 adapter->num_rx_queues = 1;
4330 adapter->num_tx_queues = 1;
4331
4332 done:
4333 if ((adapter->netdev->reg_state == NETREG_UNREGISTERED) ||
4334 (adapter->netdev->reg_state == NETREG_UNREGISTERING))
4335 return 0;
4336
4337 /* Notify the stack of the (possibly) reduced queue counts. */
4338 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
4339 return netif_set_real_num_rx_queues(adapter->netdev,
4340 adapter->num_rx_queues);
4341 }
4342
4343 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
4344 int vectors)
4345 {
4346 int err, vector_threshold;
4347
4348 /* We'll want at least 3 (vector_threshold):
4349 * 1) TxQ[0] Cleanup
4350 * 2) RxQ[0] Cleanup
4351 * 3) Other (Link Status Change, etc.)
4352 * 4) TCP Timer (optional)
4353 */
4354 vector_threshold = MIN_MSIX_COUNT;
4355
4356 /* The more we get, the more we will assign to Tx/Rx Cleanup
4357 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
4358 * Right now, we simply care about how many we'll get; we'll
4359 * set them up later while requesting irq's.
4360 */
4361 while (vectors >= vector_threshold) {
4362 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
4363 vectors);
4364 if (!err) /* Success in acquiring all requested vectors. */
4365 break;
4366 else if (err < 0)
4367 vectors = 0; /* Nasty failure, quit now */
4368 else /* err == number of vectors we should try again with */
4369 vectors = err;
4370 }
4371
4372 if (vectors < vector_threshold) {
4373 /* Can't allocate enough MSI-X interrupts? Oh well.
4374 * This just means we'll go with either a single MSI
4375 * vector or fall back to legacy interrupts.
4376 */
4377 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4378 "Unable to allocate MSI-X interrupts\n");
4379 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4380 kfree(adapter->msix_entries);
4381 adapter->msix_entries = NULL;
4382 } else {
4383 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
4384 /*
4385 * Adjust for only the vectors we'll use, which is minimum
4386 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
4387 * vectors we were allocated.
4388 */
4389 adapter->num_msix_vectors = min(vectors,
4390 adapter->max_msix_q_vectors + NON_Q_VECTORS);
4391 }
4392 }
4393
4394 /**
4395 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
4396 * @adapter: board private structure to initialize
4397 *
4398 * Cache the descriptor ring offsets for RSS to the assigned rings.
4399 *
4400 **/
4401 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
4402 {
4403 int i;
4404
4405 if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED))
4406 return false;
4407
4408 for (i = 0; i < adapter->num_rx_queues; i++)
4409 adapter->rx_ring[i]->reg_idx = i;
4410 for (i = 0; i < adapter->num_tx_queues; i++)
4411 adapter->tx_ring[i]->reg_idx = i;
4412
4413 return true;
4414 }
4415
4416 #ifdef CONFIG_IXGBE_DCB
4417
4418 /* ixgbe_get_first_reg_idx - Return first register index associated with ring */
4419 static void ixgbe_get_first_reg_idx(struct ixgbe_adapter *adapter, u8 tc,
4420 unsigned int *tx, unsigned int *rx)
4421 {
4422 struct net_device *dev = adapter->netdev;
4423 struct ixgbe_hw *hw = &adapter->hw;
4424 u8 num_tcs = netdev_get_num_tc(dev);
4425
4426 *tx = 0;
4427 *rx = 0;
4428
4429 switch (hw->mac.type) {
4430 case ixgbe_mac_82598EB:
4431 *tx = tc << 2;
4432 *rx = tc << 3;
4433 break;
4434 case ixgbe_mac_82599EB:
4435 case ixgbe_mac_X540:
4436 if (num_tcs > 4) {
4437 if (tc < 3) {
4438 *tx = tc << 5;
4439 *rx = tc << 4;
4440 } else if (tc < 5) {
4441 *tx = ((tc + 2) << 4);
4442 *rx = tc << 4;
4443 } else if (tc < num_tcs) {
4444 *tx = ((tc + 8) << 3);
4445 *rx = tc << 4;
4446 }
4447 } else {
4448 *rx = tc << 5;
4449 switch (tc) {
4450 case 0:
4451 *tx = 0;
4452 break;
4453 case 1:
4454 *tx = 64;
4455 break;
4456 case 2:
4457 *tx = 96;
4458 break;
4459 case 3:
4460 *tx = 112;
4461 break;
4462 default:
4463 break;
4464 }
4465 }
4466 break;
4467 default:
4468 break;
4469 }
4470 }
4471
4472 /**
4473 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
4474 * @adapter: board private structure to initialize
4475 *
4476 * Cache the descriptor ring offsets for DCB to the assigned rings.
4477 *
4478 **/
4479 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
4480 {
4481 struct net_device *dev = adapter->netdev;
4482 int i, j, k;
4483 u8 num_tcs = netdev_get_num_tc(dev);
4484
4485 if (!num_tcs)
4486 return false;
4487
4488 for (i = 0, k = 0; i < num_tcs; i++) {
4489 unsigned int tx_s, rx_s;
4490 u16 count = dev->tc_to_txq[i].count;
4491
4492 ixgbe_get_first_reg_idx(adapter, i, &tx_s, &rx_s);
4493 for (j = 0; j < count; j++, k++) {
4494 adapter->tx_ring[k]->reg_idx = tx_s + j;
4495 adapter->rx_ring[k]->reg_idx = rx_s + j;
4496 adapter->tx_ring[k]->dcb_tc = i;
4497 adapter->rx_ring[k]->dcb_tc = i;
4498 }
4499 }
4500
4501 return true;
4502 }
4503 #endif
4504
4505 /**
4506 * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
4507 * @adapter: board private structure to initialize
4508 *
4509 * Cache the descriptor ring offsets for Flow Director to the assigned rings.
4510 *
4511 **/
4512 static inline bool ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
4513 {
4514 int i;
4515 bool ret = false;
4516
4517 if ((adapter->flags & IXGBE_FLAG_RSS_ENABLED) &&
4518 (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)) {
4519 for (i = 0; i < adapter->num_rx_queues; i++)
4520 adapter->rx_ring[i]->reg_idx = i;
4521 for (i = 0; i < adapter->num_tx_queues; i++)
4522 adapter->tx_ring[i]->reg_idx = i;
4523 ret = true;
4524 }
4525
4526 return ret;
4527 }
4528
4529 #ifdef IXGBE_FCOE
4530 /**
4531 * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
4532 * @adapter: board private structure to initialize
4533 *
4534 * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
4535 *
4536 */
4537 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
4538 {
4539 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4540 int i;
4541 u8 fcoe_rx_i = 0, fcoe_tx_i = 0;
4542
4543 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
4544 return false;
4545
4546 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4547 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
4548 ixgbe_cache_ring_fdir(adapter);
4549 else
4550 ixgbe_cache_ring_rss(adapter);
4551
4552 fcoe_rx_i = f->mask;
4553 fcoe_tx_i = f->mask;
4554 }
4555 for (i = 0; i < f->indices; i++, fcoe_rx_i++, fcoe_tx_i++) {
4556 adapter->rx_ring[f->mask + i]->reg_idx = fcoe_rx_i;
4557 adapter->tx_ring[f->mask + i]->reg_idx = fcoe_tx_i;
4558 }
4559 return true;
4560 }
4561
4562 #endif /* IXGBE_FCOE */
4563 /**
4564 * ixgbe_cache_ring_sriov - Descriptor ring to register mapping for sriov
4565 * @adapter: board private structure to initialize
4566 *
4567 * SR-IOV doesn't use any descriptor rings but changes the default if
4568 * no other mapping is used.
4569 *
4570 */
4571 static inline bool ixgbe_cache_ring_sriov(struct ixgbe_adapter *adapter)
4572 {
4573 adapter->rx_ring[0]->reg_idx = adapter->num_vfs * 2;
4574 adapter->tx_ring[0]->reg_idx = adapter->num_vfs * 2;
4575 if (adapter->num_vfs)
4576 return true;
4577 else
4578 return false;
4579 }
4580
4581 /**
4582 * ixgbe_cache_ring_register - Descriptor ring to register mapping
4583 * @adapter: board private structure to initialize
4584 *
4585 * Once we know the feature-set enabled for the device, we'll cache
4586 * the register offset the descriptor ring is assigned to.
4587 *
4588 * Note, the order the various feature calls is important. It must start with
4589 * the "most" features enabled at the same time, then trickle down to the
4590 * least amount of features turned on at once.
4591 **/
4592 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
4593 {
4594 /* start with default case */
4595 adapter->rx_ring[0]->reg_idx = 0;
4596 adapter->tx_ring[0]->reg_idx = 0;
4597
4598 if (ixgbe_cache_ring_sriov(adapter))
4599 return;
4600
4601 #ifdef CONFIG_IXGBE_DCB
4602 if (ixgbe_cache_ring_dcb(adapter))
4603 return;
4604 #endif
4605
4606 #ifdef IXGBE_FCOE
4607 if (ixgbe_cache_ring_fcoe(adapter))
4608 return;
4609 #endif /* IXGBE_FCOE */
4610
4611 if (ixgbe_cache_ring_fdir(adapter))
4612 return;
4613
4614 if (ixgbe_cache_ring_rss(adapter))
4615 return;
4616 }
4617
4618 /**
4619 * ixgbe_alloc_queues - Allocate memory for all rings
4620 * @adapter: board private structure to initialize
4621 *
4622 * We allocate one ring per queue at run-time since we don't know the
4623 * number of queues at compile-time. The polling_netdev array is
4624 * intended for Multiqueue, but should work fine with a single queue.
4625 **/
4626 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
4627 {
4628 int rx = 0, tx = 0, nid = adapter->node;
4629
4630 if (nid < 0 || !node_online(nid))
4631 nid = first_online_node;
4632
4633 for (; tx < adapter->num_tx_queues; tx++) {
4634 struct ixgbe_ring *ring;
4635
4636 ring = kzalloc_node(sizeof(*ring), GFP_KERNEL, nid);
4637 if (!ring)
4638 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
4639 if (!ring)
4640 goto err_allocation;
4641 ring->count = adapter->tx_ring_count;
4642 ring->queue_index = tx;
4643 ring->numa_node = nid;
4644 ring->dev = &adapter->pdev->dev;
4645 ring->netdev = adapter->netdev;
4646
4647 adapter->tx_ring[tx] = ring;
4648 }
4649
4650 for (; rx < adapter->num_rx_queues; rx++) {
4651 struct ixgbe_ring *ring;
4652
4653 ring = kzalloc_node(sizeof(*ring), GFP_KERNEL, nid);
4654 if (!ring)
4655 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
4656 if (!ring)
4657 goto err_allocation;
4658 ring->count = adapter->rx_ring_count;
4659 ring->queue_index = rx;
4660 ring->numa_node = nid;
4661 ring->dev = &adapter->pdev->dev;
4662 ring->netdev = adapter->netdev;
4663
4664 adapter->rx_ring[rx] = ring;
4665 }
4666
4667 ixgbe_cache_ring_register(adapter);
4668
4669 return 0;
4670
4671 err_allocation:
4672 while (tx)
4673 kfree(adapter->tx_ring[--tx]);
4674
4675 while (rx)
4676 kfree(adapter->rx_ring[--rx]);
4677 return -ENOMEM;
4678 }
4679
4680 /**
4681 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
4682 * @adapter: board private structure to initialize
4683 *
4684 * Attempt to configure the interrupts using the best available
4685 * capabilities of the hardware and the kernel.
4686 **/
4687 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
4688 {
4689 struct ixgbe_hw *hw = &adapter->hw;
4690 int err = 0;
4691 int vector, v_budget;
4692
4693 /*
4694 * It's easy to be greedy for MSI-X vectors, but it really
4695 * doesn't do us much good if we have a lot more vectors
4696 * than CPU's. So let's be conservative and only ask for
4697 * (roughly) the same number of vectors as there are CPU's.
4698 */
4699 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
4700 (int)num_online_cpus()) + NON_Q_VECTORS;
4701
4702 /*
4703 * At the same time, hardware can only support a maximum of
4704 * hw.mac->max_msix_vectors vectors. With features
4705 * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
4706 * descriptor queues supported by our device. Thus, we cap it off in
4707 * those rare cases where the cpu count also exceeds our vector limit.
4708 */
4709 v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
4710
4711 /* A failure in MSI-X entry allocation isn't fatal, but it does
4712 * mean we disable MSI-X capabilities of the adapter. */
4713 adapter->msix_entries = kcalloc(v_budget,
4714 sizeof(struct msix_entry), GFP_KERNEL);
4715 if (adapter->msix_entries) {
4716 for (vector = 0; vector < v_budget; vector++)
4717 adapter->msix_entries[vector].entry = vector;
4718
4719 ixgbe_acquire_msix_vectors(adapter, v_budget);
4720
4721 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4722 goto out;
4723 }
4724
4725 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
4726 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
4727 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
4728 e_err(probe,
4729 "ATR is not supported while multiple "
4730 "queues are disabled. Disabling Flow Director\n");
4731 }
4732 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4733 adapter->atr_sample_rate = 0;
4734 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4735 ixgbe_disable_sriov(adapter);
4736
4737 err = ixgbe_set_num_queues(adapter);
4738 if (err)
4739 return err;
4740
4741 err = pci_enable_msi(adapter->pdev);
4742 if (!err) {
4743 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
4744 } else {
4745 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4746 "Unable to allocate MSI interrupt, "
4747 "falling back to legacy. Error: %d\n", err);
4748 /* reset err */
4749 err = 0;
4750 }
4751
4752 out:
4753 return err;
4754 }
4755
4756 /**
4757 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
4758 * @adapter: board private structure to initialize
4759 *
4760 * We allocate one q_vector per queue interrupt. If allocation fails we
4761 * return -ENOMEM.
4762 **/
4763 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
4764 {
4765 int v_idx, num_q_vectors;
4766 struct ixgbe_q_vector *q_vector;
4767
4768 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4769 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4770 else
4771 num_q_vectors = 1;
4772
4773 for (v_idx = 0; v_idx < num_q_vectors; v_idx++) {
4774 q_vector = kzalloc_node(sizeof(struct ixgbe_q_vector),
4775 GFP_KERNEL, adapter->node);
4776 if (!q_vector)
4777 q_vector = kzalloc(sizeof(struct ixgbe_q_vector),
4778 GFP_KERNEL);
4779 if (!q_vector)
4780 goto err_out;
4781
4782 q_vector->adapter = adapter;
4783 q_vector->v_idx = v_idx;
4784
4785 /* Allocate the affinity_hint cpumask, configure the mask */
4786 if (!alloc_cpumask_var(&q_vector->affinity_mask, GFP_KERNEL))
4787 goto err_out;
4788 cpumask_set_cpu(v_idx, q_vector->affinity_mask);
4789 netif_napi_add(adapter->netdev, &q_vector->napi,
4790 ixgbe_poll, 64);
4791 adapter->q_vector[v_idx] = q_vector;
4792 }
4793
4794 return 0;
4795
4796 err_out:
4797 while (v_idx) {
4798 v_idx--;
4799 q_vector = adapter->q_vector[v_idx];
4800 netif_napi_del(&q_vector->napi);
4801 free_cpumask_var(q_vector->affinity_mask);
4802 kfree(q_vector);
4803 adapter->q_vector[v_idx] = NULL;
4804 }
4805 return -ENOMEM;
4806 }
4807
4808 /**
4809 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
4810 * @adapter: board private structure to initialize
4811 *
4812 * This function frees the memory allocated to the q_vectors. In addition if
4813 * NAPI is enabled it will delete any references to the NAPI struct prior
4814 * to freeing the q_vector.
4815 **/
4816 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
4817 {
4818 int v_idx, num_q_vectors;
4819
4820 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4821 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4822 else
4823 num_q_vectors = 1;
4824
4825 for (v_idx = 0; v_idx < num_q_vectors; v_idx++) {
4826 struct ixgbe_q_vector *q_vector = adapter->q_vector[v_idx];
4827 adapter->q_vector[v_idx] = NULL;
4828 netif_napi_del(&q_vector->napi);
4829 free_cpumask_var(q_vector->affinity_mask);
4830 kfree(q_vector);
4831 }
4832 }
4833
4834 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
4835 {
4836 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4837 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4838 pci_disable_msix(adapter->pdev);
4839 kfree(adapter->msix_entries);
4840 adapter->msix_entries = NULL;
4841 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
4842 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
4843 pci_disable_msi(adapter->pdev);
4844 }
4845 }
4846
4847 /**
4848 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
4849 * @adapter: board private structure to initialize
4850 *
4851 * We determine which interrupt scheme to use based on...
4852 * - Kernel support (MSI, MSI-X)
4853 * - which can be user-defined (via MODULE_PARAM)
4854 * - Hardware queue count (num_*_queues)
4855 * - defined by miscellaneous hardware support/features (RSS, etc.)
4856 **/
4857 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
4858 {
4859 int err;
4860
4861 /* Number of supported queues */
4862 err = ixgbe_set_num_queues(adapter);
4863 if (err)
4864 return err;
4865
4866 err = ixgbe_set_interrupt_capability(adapter);
4867 if (err) {
4868 e_dev_err("Unable to setup interrupt capabilities\n");
4869 goto err_set_interrupt;
4870 }
4871
4872 err = ixgbe_alloc_q_vectors(adapter);
4873 if (err) {
4874 e_dev_err("Unable to allocate memory for queue vectors\n");
4875 goto err_alloc_q_vectors;
4876 }
4877
4878 err = ixgbe_alloc_queues(adapter);
4879 if (err) {
4880 e_dev_err("Unable to allocate memory for queues\n");
4881 goto err_alloc_queues;
4882 }
4883
4884 e_dev_info("Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u\n",
4885 (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
4886 adapter->num_rx_queues, adapter->num_tx_queues);
4887
4888 set_bit(__IXGBE_DOWN, &adapter->state);
4889
4890 return 0;
4891
4892 err_alloc_queues:
4893 ixgbe_free_q_vectors(adapter);
4894 err_alloc_q_vectors:
4895 ixgbe_reset_interrupt_capability(adapter);
4896 err_set_interrupt:
4897 return err;
4898 }
4899
4900 /**
4901 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
4902 * @adapter: board private structure to clear interrupt scheme on
4903 *
4904 * We go through and clear interrupt specific resources and reset the structure
4905 * to pre-load conditions
4906 **/
4907 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
4908 {
4909 int i;
4910
4911 for (i = 0; i < adapter->num_tx_queues; i++) {
4912 kfree(adapter->tx_ring[i]);
4913 adapter->tx_ring[i] = NULL;
4914 }
4915 for (i = 0; i < adapter->num_rx_queues; i++) {
4916 struct ixgbe_ring *ring = adapter->rx_ring[i];
4917
4918 /* ixgbe_get_stats64() might access this ring, we must wait
4919 * a grace period before freeing it.
4920 */
4921 kfree_rcu(ring, rcu);
4922 adapter->rx_ring[i] = NULL;
4923 }
4924
4925 adapter->num_tx_queues = 0;
4926 adapter->num_rx_queues = 0;
4927
4928 ixgbe_free_q_vectors(adapter);
4929 ixgbe_reset_interrupt_capability(adapter);
4930 }
4931
4932 /**
4933 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
4934 * @adapter: board private structure to initialize
4935 *
4936 * ixgbe_sw_init initializes the Adapter private data structure.
4937 * Fields are initialized based on PCI device information and
4938 * OS network device settings (MTU size).
4939 **/
4940 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
4941 {
4942 struct ixgbe_hw *hw = &adapter->hw;
4943 struct pci_dev *pdev = adapter->pdev;
4944 unsigned int rss;
4945 #ifdef CONFIG_IXGBE_DCB
4946 int j;
4947 struct tc_configuration *tc;
4948 #endif
4949
4950 /* PCI config space info */
4951
4952 hw->vendor_id = pdev->vendor;
4953 hw->device_id = pdev->device;
4954 hw->revision_id = pdev->revision;
4955 hw->subsystem_vendor_id = pdev->subsystem_vendor;
4956 hw->subsystem_device_id = pdev->subsystem_device;
4957
4958 /* Set capability flags */
4959 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
4960 adapter->ring_feature[RING_F_RSS].indices = rss;
4961 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
4962 switch (hw->mac.type) {
4963 case ixgbe_mac_82598EB:
4964 if (hw->device_id == IXGBE_DEV_ID_82598AT)
4965 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
4966 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
4967 break;
4968 case ixgbe_mac_X540:
4969 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
4970 case ixgbe_mac_82599EB:
4971 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
4972 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
4973 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
4974 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
4975 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
4976 /* Flow Director hash filters enabled */
4977 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
4978 adapter->atr_sample_rate = 20;
4979 adapter->ring_feature[RING_F_FDIR].indices =
4980 IXGBE_MAX_FDIR_INDICES;
4981 adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_64K;
4982 #ifdef IXGBE_FCOE
4983 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
4984 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
4985 adapter->ring_feature[RING_F_FCOE].indices = 0;
4986 #ifdef CONFIG_IXGBE_DCB
4987 /* Default traffic class to use for FCoE */
4988 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
4989 #endif
4990 #endif /* IXGBE_FCOE */
4991 break;
4992 default:
4993 break;
4994 }
4995
4996 /* n-tuple support exists, always init our spinlock */
4997 spin_lock_init(&adapter->fdir_perfect_lock);
4998
4999 #ifdef CONFIG_IXGBE_DCB
5000 switch (hw->mac.type) {
5001 case ixgbe_mac_X540:
5002 adapter->dcb_cfg.num_tcs.pg_tcs = X540_TRAFFIC_CLASS;
5003 adapter->dcb_cfg.num_tcs.pfc_tcs = X540_TRAFFIC_CLASS;
5004 break;
5005 default:
5006 adapter->dcb_cfg.num_tcs.pg_tcs = MAX_TRAFFIC_CLASS;
5007 adapter->dcb_cfg.num_tcs.pfc_tcs = MAX_TRAFFIC_CLASS;
5008 break;
5009 }
5010
5011 /* Configure DCB traffic classes */
5012 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
5013 tc = &adapter->dcb_cfg.tc_config[j];
5014 tc->path[DCB_TX_CONFIG].bwg_id = 0;
5015 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
5016 tc->path[DCB_RX_CONFIG].bwg_id = 0;
5017 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
5018 tc->dcb_pfc = pfc_disabled;
5019 }
5020
5021 /* Initialize default user to priority mapping, UPx->TC0 */
5022 tc = &adapter->dcb_cfg.tc_config[0];
5023 tc->path[DCB_TX_CONFIG].up_to_tc_bitmap = 0xFF;
5024 tc->path[DCB_RX_CONFIG].up_to_tc_bitmap = 0xFF;
5025
5026 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
5027 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
5028 adapter->dcb_cfg.pfc_mode_enable = false;
5029 adapter->dcb_set_bitmap = 0x00;
5030 adapter->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE;
5031 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
5032 MAX_TRAFFIC_CLASS);
5033
5034 #endif
5035
5036 /* default flow control settings */
5037 hw->fc.requested_mode = ixgbe_fc_full;
5038 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
5039 #ifdef CONFIG_DCB
5040 adapter->last_lfc_mode = hw->fc.current_mode;
5041 #endif
5042 ixgbe_pbthresh_setup(adapter);
5043 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
5044 hw->fc.send_xon = true;
5045 hw->fc.disable_fc_autoneg = false;
5046
5047 /* enable itr by default in dynamic mode */
5048 adapter->rx_itr_setting = 1;
5049 adapter->tx_itr_setting = 1;
5050
5051 /* set defaults for eitr in MegaBytes */
5052 adapter->eitr_low = 10;
5053 adapter->eitr_high = 20;
5054
5055 /* set default ring sizes */
5056 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
5057 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
5058
5059 /* set default work limits */
5060 adapter->tx_work_limit = IXGBE_DEFAULT_TX_WORK;
5061
5062 /* initialize eeprom parameters */
5063 if (ixgbe_init_eeprom_params_generic(hw)) {
5064 e_dev_err("EEPROM initialization failed\n");
5065 return -EIO;
5066 }
5067
5068 /* enable rx csum by default */
5069 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
5070
5071 /* get assigned NUMA node */
5072 adapter->node = dev_to_node(&pdev->dev);
5073
5074 set_bit(__IXGBE_DOWN, &adapter->state);
5075
5076 return 0;
5077 }
5078
5079 /**
5080 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
5081 * @tx_ring: tx descriptor ring (for a specific queue) to setup
5082 *
5083 * Return 0 on success, negative on failure
5084 **/
5085 int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
5086 {
5087 struct device *dev = tx_ring->dev;
5088 int size;
5089
5090 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
5091 tx_ring->tx_buffer_info = vzalloc_node(size, tx_ring->numa_node);
5092 if (!tx_ring->tx_buffer_info)
5093 tx_ring->tx_buffer_info = vzalloc(size);
5094 if (!tx_ring->tx_buffer_info)
5095 goto err;
5096
5097 /* round up to nearest 4K */
5098 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
5099 tx_ring->size = ALIGN(tx_ring->size, 4096);
5100
5101 tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
5102 &tx_ring->dma, GFP_KERNEL);
5103 if (!tx_ring->desc)
5104 goto err;
5105
5106 tx_ring->next_to_use = 0;
5107 tx_ring->next_to_clean = 0;
5108 return 0;
5109
5110 err:
5111 vfree(tx_ring->tx_buffer_info);
5112 tx_ring->tx_buffer_info = NULL;
5113 dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n");
5114 return -ENOMEM;
5115 }
5116
5117 /**
5118 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
5119 * @adapter: board private structure
5120 *
5121 * If this function returns with an error, then it's possible one or
5122 * more of the rings is populated (while the rest are not). It is the
5123 * callers duty to clean those orphaned rings.
5124 *
5125 * Return 0 on success, negative on failure
5126 **/
5127 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
5128 {
5129 int i, err = 0;
5130
5131 for (i = 0; i < adapter->num_tx_queues; i++) {
5132 err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
5133 if (!err)
5134 continue;
5135 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
5136 break;
5137 }
5138
5139 return err;
5140 }
5141
5142 /**
5143 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
5144 * @rx_ring: rx descriptor ring (for a specific queue) to setup
5145 *
5146 * Returns 0 on success, negative on failure
5147 **/
5148 int ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring)
5149 {
5150 struct device *dev = rx_ring->dev;
5151 int size;
5152
5153 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
5154 rx_ring->rx_buffer_info = vzalloc_node(size, rx_ring->numa_node);
5155 if (!rx_ring->rx_buffer_info)
5156 rx_ring->rx_buffer_info = vzalloc(size);
5157 if (!rx_ring->rx_buffer_info)
5158 goto err;
5159
5160 /* Round up to nearest 4K */
5161 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
5162 rx_ring->size = ALIGN(rx_ring->size, 4096);
5163
5164 rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
5165 &rx_ring->dma, GFP_KERNEL);
5166
5167 if (!rx_ring->desc)
5168 goto err;
5169
5170 rx_ring->next_to_clean = 0;
5171 rx_ring->next_to_use = 0;
5172
5173 return 0;
5174 err:
5175 vfree(rx_ring->rx_buffer_info);
5176 rx_ring->rx_buffer_info = NULL;
5177 dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");
5178 return -ENOMEM;
5179 }
5180
5181 /**
5182 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
5183 * @adapter: board private structure
5184 *
5185 * If this function returns with an error, then it's possible one or
5186 * more of the rings is populated (while the rest are not). It is the
5187 * callers duty to clean those orphaned rings.
5188 *
5189 * Return 0 on success, negative on failure
5190 **/
5191 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
5192 {
5193 int i, err = 0;
5194
5195 for (i = 0; i < adapter->num_rx_queues; i++) {
5196 err = ixgbe_setup_rx_resources(adapter->rx_ring[i]);
5197 if (!err)
5198 continue;
5199 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
5200 break;
5201 }
5202
5203 return err;
5204 }
5205
5206 /**
5207 * ixgbe_free_tx_resources - Free Tx Resources per Queue
5208 * @tx_ring: Tx descriptor ring for a specific queue
5209 *
5210 * Free all transmit software resources
5211 **/
5212 void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring)
5213 {
5214 ixgbe_clean_tx_ring(tx_ring);
5215
5216 vfree(tx_ring->tx_buffer_info);
5217 tx_ring->tx_buffer_info = NULL;
5218
5219 /* if not set, then don't free */
5220 if (!tx_ring->desc)
5221 return;
5222
5223 dma_free_coherent(tx_ring->dev, tx_ring->size,
5224 tx_ring->desc, tx_ring->dma);
5225
5226 tx_ring->desc = NULL;
5227 }
5228
5229 /**
5230 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
5231 * @adapter: board private structure
5232 *
5233 * Free all transmit software resources
5234 **/
5235 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
5236 {
5237 int i;
5238
5239 for (i = 0; i < adapter->num_tx_queues; i++)
5240 if (adapter->tx_ring[i]->desc)
5241 ixgbe_free_tx_resources(adapter->tx_ring[i]);
5242 }
5243
5244 /**
5245 * ixgbe_free_rx_resources - Free Rx Resources
5246 * @rx_ring: ring to clean the resources from
5247 *
5248 * Free all receive software resources
5249 **/
5250 void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring)
5251 {
5252 ixgbe_clean_rx_ring(rx_ring);
5253
5254 vfree(rx_ring->rx_buffer_info);
5255 rx_ring->rx_buffer_info = NULL;
5256
5257 /* if not set, then don't free */
5258 if (!rx_ring->desc)
5259 return;
5260
5261 dma_free_coherent(rx_ring->dev, rx_ring->size,
5262 rx_ring->desc, rx_ring->dma);
5263
5264 rx_ring->desc = NULL;
5265 }
5266
5267 /**
5268 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
5269 * @adapter: board private structure
5270 *
5271 * Free all receive software resources
5272 **/
5273 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
5274 {
5275 int i;
5276
5277 for (i = 0; i < adapter->num_rx_queues; i++)
5278 if (adapter->rx_ring[i]->desc)
5279 ixgbe_free_rx_resources(adapter->rx_ring[i]);
5280 }
5281
5282 /**
5283 * ixgbe_change_mtu - Change the Maximum Transfer Unit
5284 * @netdev: network interface device structure
5285 * @new_mtu: new value for maximum frame size
5286 *
5287 * Returns 0 on success, negative on failure
5288 **/
5289 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
5290 {
5291 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5292 struct ixgbe_hw *hw = &adapter->hw;
5293 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5294
5295 /* MTU < 68 is an error and causes problems on some kernels */
5296 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED &&
5297 hw->mac.type != ixgbe_mac_X540) {
5298 if ((new_mtu < 68) || (max_frame > MAXIMUM_ETHERNET_VLAN_SIZE))
5299 return -EINVAL;
5300 } else {
5301 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
5302 return -EINVAL;
5303 }
5304
5305 e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5306 /* must set new MTU before calling down or up */
5307 netdev->mtu = new_mtu;
5308
5309 if (netif_running(netdev))
5310 ixgbe_reinit_locked(adapter);
5311
5312 return 0;
5313 }
5314
5315 /**
5316 * ixgbe_open - Called when a network interface is made active
5317 * @netdev: network interface device structure
5318 *
5319 * Returns 0 on success, negative value on failure
5320 *
5321 * The open entry point is called when a network interface is made
5322 * active by the system (IFF_UP). At this point all resources needed
5323 * for transmit and receive operations are allocated, the interrupt
5324 * handler is registered with the OS, the watchdog timer is started,
5325 * and the stack is notified that the interface is ready.
5326 **/
5327 static int ixgbe_open(struct net_device *netdev)
5328 {
5329 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5330 int err;
5331
5332 /* disallow open during test */
5333 if (test_bit(__IXGBE_TESTING, &adapter->state))
5334 return -EBUSY;
5335
5336 netif_carrier_off(netdev);
5337
5338 /* allocate transmit descriptors */
5339 err = ixgbe_setup_all_tx_resources(adapter);
5340 if (err)
5341 goto err_setup_tx;
5342
5343 /* allocate receive descriptors */
5344 err = ixgbe_setup_all_rx_resources(adapter);
5345 if (err)
5346 goto err_setup_rx;
5347
5348 ixgbe_configure(adapter);
5349
5350 err = ixgbe_request_irq(adapter);
5351 if (err)
5352 goto err_req_irq;
5353
5354 ixgbe_up_complete(adapter);
5355
5356 return 0;
5357
5358 err_req_irq:
5359 err_setup_rx:
5360 ixgbe_free_all_rx_resources(adapter);
5361 err_setup_tx:
5362 ixgbe_free_all_tx_resources(adapter);
5363 ixgbe_reset(adapter);
5364
5365 return err;
5366 }
5367
5368 /**
5369 * ixgbe_close - Disables a network interface
5370 * @netdev: network interface device structure
5371 *
5372 * Returns 0, this is not allowed to fail
5373 *
5374 * The close entry point is called when an interface is de-activated
5375 * by the OS. The hardware is still under the drivers control, but
5376 * needs to be disabled. A global MAC reset is issued to stop the
5377 * hardware, and all transmit and receive resources are freed.
5378 **/
5379 static int ixgbe_close(struct net_device *netdev)
5380 {
5381 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5382
5383 ixgbe_down(adapter);
5384 ixgbe_free_irq(adapter);
5385
5386 ixgbe_fdir_filter_exit(adapter);
5387
5388 ixgbe_free_all_tx_resources(adapter);
5389 ixgbe_free_all_rx_resources(adapter);
5390
5391 ixgbe_release_hw_control(adapter);
5392
5393 return 0;
5394 }
5395
5396 #ifdef CONFIG_PM
5397 static int ixgbe_resume(struct pci_dev *pdev)
5398 {
5399 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5400 struct net_device *netdev = adapter->netdev;
5401 u32 err;
5402
5403 pci_set_power_state(pdev, PCI_D0);
5404 pci_restore_state(pdev);
5405 /*
5406 * pci_restore_state clears dev->state_saved so call
5407 * pci_save_state to restore it.
5408 */
5409 pci_save_state(pdev);
5410
5411 err = pci_enable_device_mem(pdev);
5412 if (err) {
5413 e_dev_err("Cannot enable PCI device from suspend\n");
5414 return err;
5415 }
5416 pci_set_master(pdev);
5417
5418 pci_wake_from_d3(pdev, false);
5419
5420 err = ixgbe_init_interrupt_scheme(adapter);
5421 if (err) {
5422 e_dev_err("Cannot initialize interrupts for device\n");
5423 return err;
5424 }
5425
5426 ixgbe_reset(adapter);
5427
5428 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5429
5430 if (netif_running(netdev)) {
5431 err = ixgbe_open(netdev);
5432 if (err)
5433 return err;
5434 }
5435
5436 netif_device_attach(netdev);
5437
5438 return 0;
5439 }
5440 #endif /* CONFIG_PM */
5441
5442 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
5443 {
5444 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5445 struct net_device *netdev = adapter->netdev;
5446 struct ixgbe_hw *hw = &adapter->hw;
5447 u32 ctrl, fctrl;
5448 u32 wufc = adapter->wol;
5449 #ifdef CONFIG_PM
5450 int retval = 0;
5451 #endif
5452
5453 netif_device_detach(netdev);
5454
5455 if (netif_running(netdev)) {
5456 ixgbe_down(adapter);
5457 ixgbe_free_irq(adapter);
5458 ixgbe_free_all_tx_resources(adapter);
5459 ixgbe_free_all_rx_resources(adapter);
5460 }
5461
5462 ixgbe_clear_interrupt_scheme(adapter);
5463 #ifdef CONFIG_DCB
5464 kfree(adapter->ixgbe_ieee_pfc);
5465 kfree(adapter->ixgbe_ieee_ets);
5466 #endif
5467
5468 #ifdef CONFIG_PM
5469 retval = pci_save_state(pdev);
5470 if (retval)
5471 return retval;
5472
5473 #endif
5474 if (wufc) {
5475 ixgbe_set_rx_mode(netdev);
5476
5477 /* turn on all-multi mode if wake on multicast is enabled */
5478 if (wufc & IXGBE_WUFC_MC) {
5479 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5480 fctrl |= IXGBE_FCTRL_MPE;
5481 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
5482 }
5483
5484 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
5485 ctrl |= IXGBE_CTRL_GIO_DIS;
5486 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
5487
5488 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
5489 } else {
5490 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
5491 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
5492 }
5493
5494 switch (hw->mac.type) {
5495 case ixgbe_mac_82598EB:
5496 pci_wake_from_d3(pdev, false);
5497 break;
5498 case ixgbe_mac_82599EB:
5499 case ixgbe_mac_X540:
5500 pci_wake_from_d3(pdev, !!wufc);
5501 break;
5502 default:
5503 break;
5504 }
5505
5506 *enable_wake = !!wufc;
5507
5508 ixgbe_release_hw_control(adapter);
5509
5510 pci_disable_device(pdev);
5511
5512 return 0;
5513 }
5514
5515 #ifdef CONFIG_PM
5516 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
5517 {
5518 int retval;
5519 bool wake;
5520
5521 retval = __ixgbe_shutdown(pdev, &wake);
5522 if (retval)
5523 return retval;
5524
5525 if (wake) {
5526 pci_prepare_to_sleep(pdev);
5527 } else {
5528 pci_wake_from_d3(pdev, false);
5529 pci_set_power_state(pdev, PCI_D3hot);
5530 }
5531
5532 return 0;
5533 }
5534 #endif /* CONFIG_PM */
5535
5536 static void ixgbe_shutdown(struct pci_dev *pdev)
5537 {
5538 bool wake;
5539
5540 __ixgbe_shutdown(pdev, &wake);
5541
5542 if (system_state == SYSTEM_POWER_OFF) {
5543 pci_wake_from_d3(pdev, wake);
5544 pci_set_power_state(pdev, PCI_D3hot);
5545 }
5546 }
5547
5548 /**
5549 * ixgbe_update_stats - Update the board statistics counters.
5550 * @adapter: board private structure
5551 **/
5552 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
5553 {
5554 struct net_device *netdev = adapter->netdev;
5555 struct ixgbe_hw *hw = &adapter->hw;
5556 struct ixgbe_hw_stats *hwstats = &adapter->stats;
5557 u64 total_mpc = 0;
5558 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
5559 u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
5560 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
5561 u64 bytes = 0, packets = 0;
5562 #ifdef IXGBE_FCOE
5563 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
5564 unsigned int cpu;
5565 u64 fcoe_noddp_counts_sum = 0, fcoe_noddp_ext_buff_counts_sum = 0;
5566 #endif /* IXGBE_FCOE */
5567
5568 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5569 test_bit(__IXGBE_RESETTING, &adapter->state))
5570 return;
5571
5572 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
5573 u64 rsc_count = 0;
5574 u64 rsc_flush = 0;
5575 for (i = 0; i < 16; i++)
5576 adapter->hw_rx_no_dma_resources +=
5577 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5578 for (i = 0; i < adapter->num_rx_queues; i++) {
5579 rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
5580 rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
5581 }
5582 adapter->rsc_total_count = rsc_count;
5583 adapter->rsc_total_flush = rsc_flush;
5584 }
5585
5586 for (i = 0; i < adapter->num_rx_queues; i++) {
5587 struct ixgbe_ring *rx_ring = adapter->rx_ring[i];
5588 non_eop_descs += rx_ring->rx_stats.non_eop_descs;
5589 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
5590 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
5591 bytes += rx_ring->stats.bytes;
5592 packets += rx_ring->stats.packets;
5593 }
5594 adapter->non_eop_descs = non_eop_descs;
5595 adapter->alloc_rx_page_failed = alloc_rx_page_failed;
5596 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
5597 netdev->stats.rx_bytes = bytes;
5598 netdev->stats.rx_packets = packets;
5599
5600 bytes = 0;
5601 packets = 0;
5602 /* gather some stats to the adapter struct that are per queue */
5603 for (i = 0; i < adapter->num_tx_queues; i++) {
5604 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
5605 restart_queue += tx_ring->tx_stats.restart_queue;
5606 tx_busy += tx_ring->tx_stats.tx_busy;
5607 bytes += tx_ring->stats.bytes;
5608 packets += tx_ring->stats.packets;
5609 }
5610 adapter->restart_queue = restart_queue;
5611 adapter->tx_busy = tx_busy;
5612 netdev->stats.tx_bytes = bytes;
5613 netdev->stats.tx_packets = packets;
5614
5615 hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
5616
5617 /* 8 register reads */
5618 for (i = 0; i < 8; i++) {
5619 /* for packet buffers not used, the register should read 0 */
5620 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
5621 missed_rx += mpc;
5622 hwstats->mpc[i] += mpc;
5623 total_mpc += hwstats->mpc[i];
5624 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
5625 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
5626 switch (hw->mac.type) {
5627 case ixgbe_mac_82598EB:
5628 hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
5629 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
5630 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
5631 hwstats->pxonrxc[i] +=
5632 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
5633 break;
5634 case ixgbe_mac_82599EB:
5635 case ixgbe_mac_X540:
5636 hwstats->pxonrxc[i] +=
5637 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
5638 break;
5639 default:
5640 break;
5641 }
5642 }
5643
5644 /*16 register reads */
5645 for (i = 0; i < 16; i++) {
5646 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
5647 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
5648 if ((hw->mac.type == ixgbe_mac_82599EB) ||
5649 (hw->mac.type == ixgbe_mac_X540)) {
5650 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
5651 IXGBE_READ_REG(hw, IXGBE_QBTC_H(i)); /* to clear */
5652 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC_L(i));
5653 IXGBE_READ_REG(hw, IXGBE_QBRC_H(i)); /* to clear */
5654 }
5655 }
5656
5657 hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
5658 /* work around hardware counting issue */
5659 hwstats->gprc -= missed_rx;
5660
5661 ixgbe_update_xoff_received(adapter);
5662
5663 /* 82598 hardware only has a 32 bit counter in the high register */
5664 switch (hw->mac.type) {
5665 case ixgbe_mac_82598EB:
5666 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
5667 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
5668 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
5669 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
5670 break;
5671 case ixgbe_mac_X540:
5672 /* OS2BMC stats are X540 only*/
5673 hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC);
5674 hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC);
5675 hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC);
5676 hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC);
5677 case ixgbe_mac_82599EB:
5678 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
5679 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
5680 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
5681 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
5682 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
5683 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
5684 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
5685 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
5686 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
5687 #ifdef IXGBE_FCOE
5688 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
5689 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
5690 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
5691 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
5692 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
5693 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
5694 /* Add up per cpu counters for total ddp aloc fail */
5695 if (fcoe->pcpu_noddp && fcoe->pcpu_noddp_ext_buff) {
5696 for_each_possible_cpu(cpu) {
5697 fcoe_noddp_counts_sum +=
5698 *per_cpu_ptr(fcoe->pcpu_noddp, cpu);
5699 fcoe_noddp_ext_buff_counts_sum +=
5700 *per_cpu_ptr(fcoe->
5701 pcpu_noddp_ext_buff, cpu);
5702 }
5703 }
5704 hwstats->fcoe_noddp = fcoe_noddp_counts_sum;
5705 hwstats->fcoe_noddp_ext_buff = fcoe_noddp_ext_buff_counts_sum;
5706 #endif /* IXGBE_FCOE */
5707 break;
5708 default:
5709 break;
5710 }
5711 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
5712 hwstats->bprc += bprc;
5713 hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
5714 if (hw->mac.type == ixgbe_mac_82598EB)
5715 hwstats->mprc -= bprc;
5716 hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
5717 hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
5718 hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
5719 hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
5720 hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
5721 hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
5722 hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
5723 hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
5724 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
5725 hwstats->lxontxc += lxon;
5726 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
5727 hwstats->lxofftxc += lxoff;
5728 hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
5729 hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
5730 /*
5731 * 82598 errata - tx of flow control packets is included in tx counters
5732 */
5733 xon_off_tot = lxon + lxoff;
5734 hwstats->gptc -= xon_off_tot;
5735 hwstats->mptc -= xon_off_tot;
5736 hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
5737 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5738 hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
5739 hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
5740 hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
5741 hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
5742 hwstats->ptc64 -= xon_off_tot;
5743 hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
5744 hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
5745 hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
5746 hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
5747 hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
5748 hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
5749
5750 /* Fill out the OS statistics structure */
5751 netdev->stats.multicast = hwstats->mprc;
5752
5753 /* Rx Errors */
5754 netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
5755 netdev->stats.rx_dropped = 0;
5756 netdev->stats.rx_length_errors = hwstats->rlec;
5757 netdev->stats.rx_crc_errors = hwstats->crcerrs;
5758 netdev->stats.rx_missed_errors = total_mpc;
5759 }
5760
5761 /**
5762 * ixgbe_fdir_reinit_subtask - worker thread to reinit FDIR filter table
5763 * @adapter - pointer to the device adapter structure
5764 **/
5765 static void ixgbe_fdir_reinit_subtask(struct ixgbe_adapter *adapter)
5766 {
5767 struct ixgbe_hw *hw = &adapter->hw;
5768 int i;
5769
5770 if (!(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
5771 return;
5772
5773 adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
5774
5775 /* if interface is down do nothing */
5776 if (test_bit(__IXGBE_DOWN, &adapter->state))
5777 return;
5778
5779 /* do nothing if we are not using signature filters */
5780 if (!(adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE))
5781 return;
5782
5783 adapter->fdir_overflow++;
5784
5785 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
5786 for (i = 0; i < adapter->num_tx_queues; i++)
5787 set_bit(__IXGBE_TX_FDIR_INIT_DONE,
5788 &(adapter->tx_ring[i]->state));
5789 /* re-enable flow director interrupts */
5790 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
5791 } else {
5792 e_err(probe, "failed to finish FDIR re-initialization, "
5793 "ignored adding FDIR ATR filters\n");
5794 }
5795 }
5796
5797 /**
5798 * ixgbe_check_hang_subtask - check for hung queues and dropped interrupts
5799 * @adapter - pointer to the device adapter structure
5800 *
5801 * This function serves two purposes. First it strobes the interrupt lines
5802 * in order to make certain interrupts are occurring. Secondly it sets the
5803 * bits needed to check for TX hangs. As a result we should immediately
5804 * determine if a hang has occurred.
5805 */
5806 static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter)
5807 {
5808 struct ixgbe_hw *hw = &adapter->hw;
5809 u64 eics = 0;
5810 int i;
5811
5812 /* If we're down or resetting, just bail */
5813 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5814 test_bit(__IXGBE_RESETTING, &adapter->state))
5815 return;
5816
5817 /* Force detection of hung controller */
5818 if (netif_carrier_ok(adapter->netdev)) {
5819 for (i = 0; i < adapter->num_tx_queues; i++)
5820 set_check_for_tx_hang(adapter->tx_ring[i]);
5821 }
5822
5823 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
5824 /*
5825 * for legacy and MSI interrupts don't set any bits
5826 * that are enabled for EIAM, because this operation
5827 * would set *both* EIMS and EICS for any bit in EIAM
5828 */
5829 IXGBE_WRITE_REG(hw, IXGBE_EICS,
5830 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
5831 } else {
5832 /* get one bit for every active tx/rx interrupt vector */
5833 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
5834 struct ixgbe_q_vector *qv = adapter->q_vector[i];
5835 if (qv->rx.ring || qv->tx.ring)
5836 eics |= ((u64)1 << i);
5837 }
5838 }
5839
5840 /* Cause software interrupt to ensure rings are cleaned */
5841 ixgbe_irq_rearm_queues(adapter, eics);
5842
5843 }
5844
5845 /**
5846 * ixgbe_watchdog_update_link - update the link status
5847 * @adapter - pointer to the device adapter structure
5848 * @link_speed - pointer to a u32 to store the link_speed
5849 **/
5850 static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter)
5851 {
5852 struct ixgbe_hw *hw = &adapter->hw;
5853 u32 link_speed = adapter->link_speed;
5854 bool link_up = adapter->link_up;
5855 int i;
5856
5857 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
5858 return;
5859
5860 if (hw->mac.ops.check_link) {
5861 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
5862 } else {
5863 /* always assume link is up, if no check link function */
5864 link_speed = IXGBE_LINK_SPEED_10GB_FULL;
5865 link_up = true;
5866 }
5867 if (link_up) {
5868 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5869 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
5870 hw->mac.ops.fc_enable(hw, i);
5871 } else {
5872 hw->mac.ops.fc_enable(hw, 0);
5873 }
5874 }
5875
5876 if (link_up ||
5877 time_after(jiffies, (adapter->link_check_timeout +
5878 IXGBE_TRY_LINK_TIMEOUT))) {
5879 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5880 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
5881 IXGBE_WRITE_FLUSH(hw);
5882 }
5883
5884 adapter->link_up = link_up;
5885 adapter->link_speed = link_speed;
5886 }
5887
5888 /**
5889 * ixgbe_watchdog_link_is_up - update netif_carrier status and
5890 * print link up message
5891 * @adapter - pointer to the device adapter structure
5892 **/
5893 static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
5894 {
5895 struct net_device *netdev = adapter->netdev;
5896 struct ixgbe_hw *hw = &adapter->hw;
5897 u32 link_speed = adapter->link_speed;
5898 bool flow_rx, flow_tx;
5899
5900 /* only continue if link was previously down */
5901 if (netif_carrier_ok(netdev))
5902 return;
5903
5904 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
5905
5906 switch (hw->mac.type) {
5907 case ixgbe_mac_82598EB: {
5908 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5909 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
5910 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
5911 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
5912 }
5913 break;
5914 case ixgbe_mac_X540:
5915 case ixgbe_mac_82599EB: {
5916 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
5917 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
5918 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
5919 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
5920 }
5921 break;
5922 default:
5923 flow_tx = false;
5924 flow_rx = false;
5925 break;
5926 }
5927 e_info(drv, "NIC Link is Up %s, Flow Control: %s\n",
5928 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
5929 "10 Gbps" :
5930 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
5931 "1 Gbps" :
5932 (link_speed == IXGBE_LINK_SPEED_100_FULL ?
5933 "100 Mbps" :
5934 "unknown speed"))),
5935 ((flow_rx && flow_tx) ? "RX/TX" :
5936 (flow_rx ? "RX" :
5937 (flow_tx ? "TX" : "None"))));
5938
5939 netif_carrier_on(netdev);
5940 ixgbe_check_vf_rate_limit(adapter);
5941 }
5942
5943 /**
5944 * ixgbe_watchdog_link_is_down - update netif_carrier status and
5945 * print link down message
5946 * @adapter - pointer to the adapter structure
5947 **/
5948 static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter* adapter)
5949 {
5950 struct net_device *netdev = adapter->netdev;
5951 struct ixgbe_hw *hw = &adapter->hw;
5952
5953 adapter->link_up = false;
5954 adapter->link_speed = 0;
5955
5956 /* only continue if link was up previously */
5957 if (!netif_carrier_ok(netdev))
5958 return;
5959
5960 /* poll for SFP+ cable when link is down */
5961 if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB)
5962 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
5963
5964 e_info(drv, "NIC Link is Down\n");
5965 netif_carrier_off(netdev);
5966 }
5967
5968 /**
5969 * ixgbe_watchdog_flush_tx - flush queues on link down
5970 * @adapter - pointer to the device adapter structure
5971 **/
5972 static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter)
5973 {
5974 int i;
5975 int some_tx_pending = 0;
5976
5977 if (!netif_carrier_ok(adapter->netdev)) {
5978 for (i = 0; i < adapter->num_tx_queues; i++) {
5979 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
5980 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
5981 some_tx_pending = 1;
5982 break;
5983 }
5984 }
5985
5986 if (some_tx_pending) {
5987 /* We've lost link, so the controller stops DMA,
5988 * but we've got queued Tx work that's never going
5989 * to get done, so reset controller to flush Tx.
5990 * (Do the reset outside of interrupt context).
5991 */
5992 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
5993 }
5994 }
5995 }
5996
5997 static void ixgbe_spoof_check(struct ixgbe_adapter *adapter)
5998 {
5999 u32 ssvpc;
6000
6001 /* Do not perform spoof check for 82598 */
6002 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
6003 return;
6004
6005 ssvpc = IXGBE_READ_REG(&adapter->hw, IXGBE_SSVPC);
6006
6007 /*
6008 * ssvpc register is cleared on read, if zero then no
6009 * spoofed packets in the last interval.
6010 */
6011 if (!ssvpc)
6012 return;
6013
6014 e_warn(drv, "%d Spoofed packets detected\n", ssvpc);
6015 }
6016
6017 /**
6018 * ixgbe_watchdog_subtask - check and bring link up
6019 * @adapter - pointer to the device adapter structure
6020 **/
6021 static void ixgbe_watchdog_subtask(struct ixgbe_adapter *adapter)
6022 {
6023 /* if interface is down do nothing */
6024 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6025 test_bit(__IXGBE_RESETTING, &adapter->state))
6026 return;
6027
6028 ixgbe_watchdog_update_link(adapter);
6029
6030 if (adapter->link_up)
6031 ixgbe_watchdog_link_is_up(adapter);
6032 else
6033 ixgbe_watchdog_link_is_down(adapter);
6034
6035 ixgbe_spoof_check(adapter);
6036 ixgbe_update_stats(adapter);
6037
6038 ixgbe_watchdog_flush_tx(adapter);
6039 }
6040
6041 /**
6042 * ixgbe_sfp_detection_subtask - poll for SFP+ cable
6043 * @adapter - the ixgbe adapter structure
6044 **/
6045 static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter)
6046 {
6047 struct ixgbe_hw *hw = &adapter->hw;
6048 s32 err;
6049
6050 /* not searching for SFP so there is nothing to do here */
6051 if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) &&
6052 !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
6053 return;
6054
6055 /* someone else is in init, wait until next service event */
6056 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
6057 return;
6058
6059 err = hw->phy.ops.identify_sfp(hw);
6060 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
6061 goto sfp_out;
6062
6063 if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
6064 /* If no cable is present, then we need to reset
6065 * the next time we find a good cable. */
6066 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
6067 }
6068
6069 /* exit on error */
6070 if (err)
6071 goto sfp_out;
6072
6073 /* exit if reset not needed */
6074 if (!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
6075 goto sfp_out;
6076
6077 adapter->flags2 &= ~IXGBE_FLAG2_SFP_NEEDS_RESET;
6078
6079 /*
6080 * A module may be identified correctly, but the EEPROM may not have
6081 * support for that module. setup_sfp() will fail in that case, so
6082 * we should not allow that module to load.
6083 */
6084 if (hw->mac.type == ixgbe_mac_82598EB)
6085 err = hw->phy.ops.reset(hw);
6086 else
6087 err = hw->mac.ops.setup_sfp(hw);
6088
6089 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
6090 goto sfp_out;
6091
6092 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
6093 e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
6094
6095 sfp_out:
6096 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
6097
6098 if ((err == IXGBE_ERR_SFP_NOT_SUPPORTED) &&
6099 (adapter->netdev->reg_state == NETREG_REGISTERED)) {
6100 e_dev_err("failed to initialize because an unsupported "
6101 "SFP+ module type was detected.\n");
6102 e_dev_err("Reload the driver after installing a "
6103 "supported module.\n");
6104 unregister_netdev(adapter->netdev);
6105 }
6106 }
6107
6108 /**
6109 * ixgbe_sfp_link_config_subtask - set up link SFP after module install
6110 * @adapter - the ixgbe adapter structure
6111 **/
6112 static void ixgbe_sfp_link_config_subtask(struct ixgbe_adapter *adapter)
6113 {
6114 struct ixgbe_hw *hw = &adapter->hw;
6115 u32 autoneg;
6116 bool negotiation;
6117
6118 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_CONFIG))
6119 return;
6120
6121 /* someone else is in init, wait until next service event */
6122 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
6123 return;
6124
6125 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
6126
6127 autoneg = hw->phy.autoneg_advertised;
6128 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
6129 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
6130 if (hw->mac.ops.setup_link)
6131 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
6132
6133 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
6134 adapter->link_check_timeout = jiffies;
6135 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
6136 }
6137
6138 #ifdef CONFIG_PCI_IOV
6139 static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter)
6140 {
6141 int vf;
6142 struct ixgbe_hw *hw = &adapter->hw;
6143 struct net_device *netdev = adapter->netdev;
6144 u32 gpc;
6145 u32 ciaa, ciad;
6146
6147 gpc = IXGBE_READ_REG(hw, IXGBE_TXDGPC);
6148 if (gpc) /* If incrementing then no need for the check below */
6149 return;
6150 /*
6151 * Check to see if a bad DMA write target from an errant or
6152 * malicious VF has caused a PCIe error. If so then we can
6153 * issue a VFLR to the offending VF(s) and then resume without
6154 * requesting a full slot reset.
6155 */
6156
6157 for (vf = 0; vf < adapter->num_vfs; vf++) {
6158 ciaa = (vf << 16) | 0x80000000;
6159 /* 32 bit read so align, we really want status at offset 6 */
6160 ciaa |= PCI_COMMAND;
6161 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
6162 ciad = IXGBE_READ_REG(hw, IXGBE_CIAD_82599);
6163 ciaa &= 0x7FFFFFFF;
6164 /* disable debug mode asap after reading data */
6165 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
6166 /* Get the upper 16 bits which will be the PCI status reg */
6167 ciad >>= 16;
6168 if (ciad & PCI_STATUS_REC_MASTER_ABORT) {
6169 netdev_err(netdev, "VF %d Hung DMA\n", vf);
6170 /* Issue VFLR */
6171 ciaa = (vf << 16) | 0x80000000;
6172 ciaa |= 0xA8;
6173 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
6174 ciad = 0x00008000; /* VFLR */
6175 IXGBE_WRITE_REG(hw, IXGBE_CIAD_82599, ciad);
6176 ciaa &= 0x7FFFFFFF;
6177 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
6178 }
6179 }
6180 }
6181
6182 #endif
6183 /**
6184 * ixgbe_service_timer - Timer Call-back
6185 * @data: pointer to adapter cast into an unsigned long
6186 **/
6187 static void ixgbe_service_timer(unsigned long data)
6188 {
6189 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
6190 unsigned long next_event_offset;
6191 bool ready = true;
6192
6193 #ifdef CONFIG_PCI_IOV
6194 ready = false;
6195
6196 /*
6197 * don't bother with SR-IOV VF DMA hang check if there are
6198 * no VFs or the link is down
6199 */
6200 if (!adapter->num_vfs ||
6201 (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)) {
6202 ready = true;
6203 goto normal_timer_service;
6204 }
6205
6206 /* If we have VFs allocated then we must check for DMA hangs */
6207 ixgbe_check_for_bad_vf(adapter);
6208 next_event_offset = HZ / 50;
6209 adapter->timer_event_accumulator++;
6210
6211 if (adapter->timer_event_accumulator >= 100) {
6212 ready = true;
6213 adapter->timer_event_accumulator = 0;
6214 }
6215
6216 goto schedule_event;
6217
6218 normal_timer_service:
6219 #endif
6220 /* poll faster when waiting for link */
6221 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
6222 next_event_offset = HZ / 10;
6223 else
6224 next_event_offset = HZ * 2;
6225
6226 #ifdef CONFIG_PCI_IOV
6227 schedule_event:
6228 #endif
6229 /* Reset the timer */
6230 mod_timer(&adapter->service_timer, next_event_offset + jiffies);
6231
6232 if (ready)
6233 ixgbe_service_event_schedule(adapter);
6234 }
6235
6236 static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter)
6237 {
6238 if (!(adapter->flags2 & IXGBE_FLAG2_RESET_REQUESTED))
6239 return;
6240
6241 adapter->flags2 &= ~IXGBE_FLAG2_RESET_REQUESTED;
6242
6243 /* If we're already down or resetting, just bail */
6244 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6245 test_bit(__IXGBE_RESETTING, &adapter->state))
6246 return;
6247
6248 ixgbe_dump(adapter);
6249 netdev_err(adapter->netdev, "Reset adapter\n");
6250 adapter->tx_timeout_count++;
6251
6252 ixgbe_reinit_locked(adapter);
6253 }
6254
6255 /**
6256 * ixgbe_service_task - manages and runs subtasks
6257 * @work: pointer to work_struct containing our data
6258 **/
6259 static void ixgbe_service_task(struct work_struct *work)
6260 {
6261 struct ixgbe_adapter *adapter = container_of(work,
6262 struct ixgbe_adapter,
6263 service_task);
6264
6265 ixgbe_reset_subtask(adapter);
6266 ixgbe_sfp_detection_subtask(adapter);
6267 ixgbe_sfp_link_config_subtask(adapter);
6268 ixgbe_check_overtemp_subtask(adapter);
6269 ixgbe_watchdog_subtask(adapter);
6270 ixgbe_fdir_reinit_subtask(adapter);
6271 ixgbe_check_hang_subtask(adapter);
6272
6273 ixgbe_service_event_complete(adapter);
6274 }
6275
6276 void ixgbe_tx_ctxtdesc(struct ixgbe_ring *tx_ring, u32 vlan_macip_lens,
6277 u32 fcoe_sof_eof, u32 type_tucmd, u32 mss_l4len_idx)
6278 {
6279 struct ixgbe_adv_tx_context_desc *context_desc;
6280 u16 i = tx_ring->next_to_use;
6281
6282 context_desc = IXGBE_TX_CTXTDESC_ADV(tx_ring, i);
6283
6284 i++;
6285 tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
6286
6287 /* set bits to identify this as an advanced context descriptor */
6288 type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
6289
6290 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
6291 context_desc->seqnum_seed = cpu_to_le32(fcoe_sof_eof);
6292 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd);
6293 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
6294 }
6295
6296 static int ixgbe_tso(struct ixgbe_ring *tx_ring, struct sk_buff *skb,
6297 u32 tx_flags, __be16 protocol, u8 *hdr_len)
6298 {
6299 int err;
6300 u32 vlan_macip_lens, type_tucmd;
6301 u32 mss_l4len_idx, l4len;
6302
6303 if (!skb_is_gso(skb))
6304 return 0;
6305
6306 if (skb_header_cloned(skb)) {
6307 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
6308 if (err)
6309 return err;
6310 }
6311
6312 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
6313 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
6314
6315 if (protocol == __constant_htons(ETH_P_IP)) {
6316 struct iphdr *iph = ip_hdr(skb);
6317 iph->tot_len = 0;
6318 iph->check = 0;
6319 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
6320 iph->daddr, 0,
6321 IPPROTO_TCP,
6322 0);
6323 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
6324 } else if (skb_is_gso_v6(skb)) {
6325 ipv6_hdr(skb)->payload_len = 0;
6326 tcp_hdr(skb)->check =
6327 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
6328 &ipv6_hdr(skb)->daddr,
6329 0, IPPROTO_TCP, 0);
6330 }
6331
6332 l4len = tcp_hdrlen(skb);
6333 *hdr_len = skb_transport_offset(skb) + l4len;
6334
6335 /* mss_l4len_id: use 1 as index for TSO */
6336 mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
6337 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
6338 mss_l4len_idx |= 1 << IXGBE_ADVTXD_IDX_SHIFT;
6339
6340 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
6341 vlan_macip_lens = skb_network_header_len(skb);
6342 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
6343 vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
6344
6345 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, type_tucmd,
6346 mss_l4len_idx);
6347
6348 return 1;
6349 }
6350
6351 static bool ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
6352 struct sk_buff *skb, u32 tx_flags,
6353 __be16 protocol)
6354 {
6355 u32 vlan_macip_lens = 0;
6356 u32 mss_l4len_idx = 0;
6357 u32 type_tucmd = 0;
6358
6359 if (skb->ip_summed != CHECKSUM_PARTIAL) {
6360 if (!(tx_flags & IXGBE_TX_FLAGS_HW_VLAN) &&
6361 !(tx_flags & IXGBE_TX_FLAGS_TXSW))
6362 return false;
6363 } else {
6364 u8 l4_hdr = 0;
6365 switch (protocol) {
6366 case __constant_htons(ETH_P_IP):
6367 vlan_macip_lens |= skb_network_header_len(skb);
6368 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
6369 l4_hdr = ip_hdr(skb)->protocol;
6370 break;
6371 case __constant_htons(ETH_P_IPV6):
6372 vlan_macip_lens |= skb_network_header_len(skb);
6373 l4_hdr = ipv6_hdr(skb)->nexthdr;
6374 break;
6375 default:
6376 if (unlikely(net_ratelimit())) {
6377 dev_warn(tx_ring->dev,
6378 "partial checksum but proto=%x!\n",
6379 skb->protocol);
6380 }
6381 break;
6382 }
6383
6384 switch (l4_hdr) {
6385 case IPPROTO_TCP:
6386 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
6387 mss_l4len_idx = tcp_hdrlen(skb) <<
6388 IXGBE_ADVTXD_L4LEN_SHIFT;
6389 break;
6390 case IPPROTO_SCTP:
6391 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
6392 mss_l4len_idx = sizeof(struct sctphdr) <<
6393 IXGBE_ADVTXD_L4LEN_SHIFT;
6394 break;
6395 case IPPROTO_UDP:
6396 mss_l4len_idx = sizeof(struct udphdr) <<
6397 IXGBE_ADVTXD_L4LEN_SHIFT;
6398 break;
6399 default:
6400 if (unlikely(net_ratelimit())) {
6401 dev_warn(tx_ring->dev,
6402 "partial checksum but l4 proto=%x!\n",
6403 skb->protocol);
6404 }
6405 break;
6406 }
6407 }
6408
6409 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
6410 vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
6411
6412 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0,
6413 type_tucmd, mss_l4len_idx);
6414
6415 return (skb->ip_summed == CHECKSUM_PARTIAL);
6416 }
6417
6418 static __le32 ixgbe_tx_cmd_type(u32 tx_flags)
6419 {
6420 /* set type for advanced descriptor with frame checksum insertion */
6421 __le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA |
6422 IXGBE_ADVTXD_DCMD_IFCS |
6423 IXGBE_ADVTXD_DCMD_DEXT);
6424
6425 /* set HW vlan bit if vlan is present */
6426 if (tx_flags & IXGBE_TX_FLAGS_HW_VLAN)
6427 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE);
6428
6429 /* set segmentation enable bits for TSO/FSO */
6430 #ifdef IXGBE_FCOE
6431 if ((tx_flags & IXGBE_TX_FLAGS_TSO) || (tx_flags & IXGBE_TX_FLAGS_FSO))
6432 #else
6433 if (tx_flags & IXGBE_TX_FLAGS_TSO)
6434 #endif
6435 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE);
6436
6437 return cmd_type;
6438 }
6439
6440 static __le32 ixgbe_tx_olinfo_status(u32 tx_flags, unsigned int paylen)
6441 {
6442 __le32 olinfo_status =
6443 cpu_to_le32(paylen << IXGBE_ADVTXD_PAYLEN_SHIFT);
6444
6445 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
6446 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM |
6447 (1 << IXGBE_ADVTXD_IDX_SHIFT));
6448 /* enble IPv4 checksum for TSO */
6449 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
6450 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM);
6451 }
6452
6453 /* enable L4 checksum for TSO and TX checksum offload */
6454 if (tx_flags & IXGBE_TX_FLAGS_CSUM)
6455 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM);
6456
6457 #ifdef IXGBE_FCOE
6458 /* use index 1 context for FCOE/FSO */
6459 if (tx_flags & IXGBE_TX_FLAGS_FCOE)
6460 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC |
6461 (1 << IXGBE_ADVTXD_IDX_SHIFT));
6462
6463 #endif
6464 /*
6465 * Check Context must be set if Tx switch is enabled, which it
6466 * always is for case where virtual functions are running
6467 */
6468 if (tx_flags & IXGBE_TX_FLAGS_TXSW)
6469 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC);
6470
6471 return olinfo_status;
6472 }
6473
6474 #define IXGBE_TXD_CMD (IXGBE_TXD_CMD_EOP | \
6475 IXGBE_TXD_CMD_RS)
6476
6477 static void ixgbe_tx_map(struct ixgbe_ring *tx_ring,
6478 struct sk_buff *skb,
6479 struct ixgbe_tx_buffer *first,
6480 u32 tx_flags,
6481 const u8 hdr_len)
6482 {
6483 struct device *dev = tx_ring->dev;
6484 struct ixgbe_tx_buffer *tx_buffer_info;
6485 union ixgbe_adv_tx_desc *tx_desc;
6486 dma_addr_t dma;
6487 __le32 cmd_type, olinfo_status;
6488 struct skb_frag_struct *frag;
6489 unsigned int f = 0;
6490 unsigned int data_len = skb->data_len;
6491 unsigned int size = skb_headlen(skb);
6492 u32 offset = 0;
6493 u32 paylen = skb->len - hdr_len;
6494 u16 i = tx_ring->next_to_use;
6495 u16 gso_segs;
6496
6497 #ifdef IXGBE_FCOE
6498 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6499 if (data_len >= sizeof(struct fcoe_crc_eof)) {
6500 data_len -= sizeof(struct fcoe_crc_eof);
6501 } else {
6502 size -= sizeof(struct fcoe_crc_eof) - data_len;
6503 data_len = 0;
6504 }
6505 }
6506
6507 #endif
6508 dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
6509 if (dma_mapping_error(dev, dma))
6510 goto dma_error;
6511
6512 cmd_type = ixgbe_tx_cmd_type(tx_flags);
6513 olinfo_status = ixgbe_tx_olinfo_status(tx_flags, paylen);
6514
6515 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
6516
6517 for (;;) {
6518 while (size > IXGBE_MAX_DATA_PER_TXD) {
6519 tx_desc->read.buffer_addr = cpu_to_le64(dma + offset);
6520 tx_desc->read.cmd_type_len =
6521 cmd_type | cpu_to_le32(IXGBE_MAX_DATA_PER_TXD);
6522 tx_desc->read.olinfo_status = olinfo_status;
6523
6524 offset += IXGBE_MAX_DATA_PER_TXD;
6525 size -= IXGBE_MAX_DATA_PER_TXD;
6526
6527 tx_desc++;
6528 i++;
6529 if (i == tx_ring->count) {
6530 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, 0);
6531 i = 0;
6532 }
6533 }
6534
6535 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6536 tx_buffer_info->length = offset + size;
6537 tx_buffer_info->tx_flags = tx_flags;
6538 tx_buffer_info->dma = dma;
6539
6540 tx_desc->read.buffer_addr = cpu_to_le64(dma + offset);
6541 tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size);
6542 tx_desc->read.olinfo_status = olinfo_status;
6543
6544 if (!data_len)
6545 break;
6546
6547 frag = &skb_shinfo(skb)->frags[f];
6548 #ifdef IXGBE_FCOE
6549 size = min_t(unsigned int, data_len, skb_frag_size(frag));
6550 #else
6551 size = skb_frag_size(frag);
6552 #endif
6553 data_len -= size;
6554 f++;
6555
6556 offset = 0;
6557 tx_flags |= IXGBE_TX_FLAGS_MAPPED_AS_PAGE;
6558
6559 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
6560 if (dma_mapping_error(dev, dma))
6561 goto dma_error;
6562
6563 tx_desc++;
6564 i++;
6565 if (i == tx_ring->count) {
6566 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, 0);
6567 i = 0;
6568 }
6569 }
6570
6571 tx_desc->read.cmd_type_len |= cpu_to_le32(IXGBE_TXD_CMD);
6572
6573 i++;
6574 if (i == tx_ring->count)
6575 i = 0;
6576
6577 tx_ring->next_to_use = i;
6578
6579 if (tx_flags & IXGBE_TX_FLAGS_TSO)
6580 gso_segs = skb_shinfo(skb)->gso_segs;
6581 #ifdef IXGBE_FCOE
6582 /* adjust for FCoE Sequence Offload */
6583 else if (tx_flags & IXGBE_TX_FLAGS_FSO)
6584 gso_segs = DIV_ROUND_UP(skb->len - hdr_len,
6585 skb_shinfo(skb)->gso_size);
6586 #endif /* IXGBE_FCOE */
6587 else
6588 gso_segs = 1;
6589
6590 /* multiply data chunks by size of headers */
6591 tx_buffer_info->bytecount = paylen + (gso_segs * hdr_len);
6592 tx_buffer_info->gso_segs = gso_segs;
6593 tx_buffer_info->skb = skb;
6594
6595 /* set the timestamp */
6596 first->time_stamp = jiffies;
6597
6598 /*
6599 * Force memory writes to complete before letting h/w
6600 * know there are new descriptors to fetch. (Only
6601 * applicable for weak-ordered memory model archs,
6602 * such as IA-64).
6603 */
6604 wmb();
6605
6606 /* set next_to_watch value indicating a packet is present */
6607 first->next_to_watch = tx_desc;
6608
6609 /* notify HW of packet */
6610 writel(i, tx_ring->tail);
6611
6612 return;
6613 dma_error:
6614 dev_err(dev, "TX DMA map failed\n");
6615
6616 /* clear dma mappings for failed tx_buffer_info map */
6617 for (;;) {
6618 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6619 ixgbe_unmap_tx_resource(tx_ring, tx_buffer_info);
6620 if (tx_buffer_info == first)
6621 break;
6622 if (i == 0)
6623 i = tx_ring->count;
6624 i--;
6625 }
6626
6627 dev_kfree_skb_any(skb);
6628
6629 tx_ring->next_to_use = i;
6630 }
6631
6632 static void ixgbe_atr(struct ixgbe_ring *ring, struct sk_buff *skb,
6633 u32 tx_flags, __be16 protocol)
6634 {
6635 struct ixgbe_q_vector *q_vector = ring->q_vector;
6636 union ixgbe_atr_hash_dword input = { .dword = 0 };
6637 union ixgbe_atr_hash_dword common = { .dword = 0 };
6638 union {
6639 unsigned char *network;
6640 struct iphdr *ipv4;
6641 struct ipv6hdr *ipv6;
6642 } hdr;
6643 struct tcphdr *th;
6644 __be16 vlan_id;
6645
6646 /* if ring doesn't have a interrupt vector, cannot perform ATR */
6647 if (!q_vector)
6648 return;
6649
6650 /* do nothing if sampling is disabled */
6651 if (!ring->atr_sample_rate)
6652 return;
6653
6654 ring->atr_count++;
6655
6656 /* snag network header to get L4 type and address */
6657 hdr.network = skb_network_header(skb);
6658
6659 /* Currently only IPv4/IPv6 with TCP is supported */
6660 if ((protocol != __constant_htons(ETH_P_IPV6) ||
6661 hdr.ipv6->nexthdr != IPPROTO_TCP) &&
6662 (protocol != __constant_htons(ETH_P_IP) ||
6663 hdr.ipv4->protocol != IPPROTO_TCP))
6664 return;
6665
6666 th = tcp_hdr(skb);
6667
6668 /* skip this packet since it is invalid or the socket is closing */
6669 if (!th || th->fin)
6670 return;
6671
6672 /* sample on all syn packets or once every atr sample count */
6673 if (!th->syn && (ring->atr_count < ring->atr_sample_rate))
6674 return;
6675
6676 /* reset sample count */
6677 ring->atr_count = 0;
6678
6679 vlan_id = htons(tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT);
6680
6681 /*
6682 * src and dst are inverted, think how the receiver sees them
6683 *
6684 * The input is broken into two sections, a non-compressed section
6685 * containing vm_pool, vlan_id, and flow_type. The rest of the data
6686 * is XORed together and stored in the compressed dword.
6687 */
6688 input.formatted.vlan_id = vlan_id;
6689
6690 /*
6691 * since src port and flex bytes occupy the same word XOR them together
6692 * and write the value to source port portion of compressed dword
6693 */
6694 if (tx_flags & (IXGBE_TX_FLAGS_SW_VLAN | IXGBE_TX_FLAGS_HW_VLAN))
6695 common.port.src ^= th->dest ^ __constant_htons(ETH_P_8021Q);
6696 else
6697 common.port.src ^= th->dest ^ protocol;
6698 common.port.dst ^= th->source;
6699
6700 if (protocol == __constant_htons(ETH_P_IP)) {
6701 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4;
6702 common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr;
6703 } else {
6704 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6;
6705 common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^
6706 hdr.ipv6->saddr.s6_addr32[1] ^
6707 hdr.ipv6->saddr.s6_addr32[2] ^
6708 hdr.ipv6->saddr.s6_addr32[3] ^
6709 hdr.ipv6->daddr.s6_addr32[0] ^
6710 hdr.ipv6->daddr.s6_addr32[1] ^
6711 hdr.ipv6->daddr.s6_addr32[2] ^
6712 hdr.ipv6->daddr.s6_addr32[3];
6713 }
6714
6715 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
6716 ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw,
6717 input, common, ring->queue_index);
6718 }
6719
6720 static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
6721 {
6722 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
6723 /* Herbert's original patch had:
6724 * smp_mb__after_netif_stop_queue();
6725 * but since that doesn't exist yet, just open code it. */
6726 smp_mb();
6727
6728 /* We need to check again in a case another CPU has just
6729 * made room available. */
6730 if (likely(ixgbe_desc_unused(tx_ring) < size))
6731 return -EBUSY;
6732
6733 /* A reprieve! - use start_queue because it doesn't call schedule */
6734 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
6735 ++tx_ring->tx_stats.restart_queue;
6736 return 0;
6737 }
6738
6739 static inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
6740 {
6741 if (likely(ixgbe_desc_unused(tx_ring) >= size))
6742 return 0;
6743 return __ixgbe_maybe_stop_tx(tx_ring, size);
6744 }
6745
6746 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
6747 {
6748 struct ixgbe_adapter *adapter = netdev_priv(dev);
6749 int txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) :
6750 smp_processor_id();
6751 #ifdef IXGBE_FCOE
6752 __be16 protocol = vlan_get_protocol(skb);
6753
6754 if (((protocol == htons(ETH_P_FCOE)) ||
6755 (protocol == htons(ETH_P_FIP))) &&
6756 (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) {
6757 txq &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
6758 txq += adapter->ring_feature[RING_F_FCOE].mask;
6759 return txq;
6760 }
6761 #endif
6762
6763 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
6764 while (unlikely(txq >= dev->real_num_tx_queues))
6765 txq -= dev->real_num_tx_queues;
6766 return txq;
6767 }
6768
6769 return skb_tx_hash(dev, skb);
6770 }
6771
6772 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
6773 struct ixgbe_adapter *adapter,
6774 struct ixgbe_ring *tx_ring)
6775 {
6776 struct ixgbe_tx_buffer *first;
6777 int tso;
6778 u32 tx_flags = 0;
6779 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
6780 unsigned short f;
6781 #endif
6782 u16 count = TXD_USE_COUNT(skb_headlen(skb));
6783 __be16 protocol = skb->protocol;
6784 u8 hdr_len = 0;
6785
6786 /*
6787 * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
6788 * + 1 desc for skb_head_len/IXGBE_MAX_DATA_PER_TXD,
6789 * + 2 desc gap to keep tail from touching head,
6790 * + 1 desc for context descriptor,
6791 * otherwise try next time
6792 */
6793 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
6794 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
6795 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
6796 #else
6797 count += skb_shinfo(skb)->nr_frags;
6798 #endif
6799 if (ixgbe_maybe_stop_tx(tx_ring, count + 3)) {
6800 tx_ring->tx_stats.tx_busy++;
6801 return NETDEV_TX_BUSY;
6802 }
6803
6804 #ifdef CONFIG_PCI_IOV
6805 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6806 tx_flags |= IXGBE_TX_FLAGS_TXSW;
6807
6808 #endif
6809 /* if we have a HW VLAN tag being added default to the HW one */
6810 if (vlan_tx_tag_present(skb)) {
6811 tx_flags |= vlan_tx_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT;
6812 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
6813 /* else if it is a SW VLAN check the next protocol and store the tag */
6814 } else if (protocol == __constant_htons(ETH_P_8021Q)) {
6815 struct vlan_hdr *vhdr, _vhdr;
6816 vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(_vhdr), &_vhdr);
6817 if (!vhdr)
6818 goto out_drop;
6819
6820 protocol = vhdr->h_vlan_encapsulated_proto;
6821 tx_flags |= ntohs(vhdr->h_vlan_TCI) << IXGBE_TX_FLAGS_VLAN_SHIFT;
6822 tx_flags |= IXGBE_TX_FLAGS_SW_VLAN;
6823 }
6824
6825 /* DCB maps skb priorities 0-7 onto 3 bit PCP of VLAN tag. */
6826 if ((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
6827 ((tx_flags & (IXGBE_TX_FLAGS_HW_VLAN | IXGBE_TX_FLAGS_SW_VLAN)) ||
6828 (skb->priority != TC_PRIO_CONTROL))) {
6829 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
6830 tx_flags |= (skb->priority & 0x7) <<
6831 IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT;
6832 if (tx_flags & IXGBE_TX_FLAGS_SW_VLAN) {
6833 struct vlan_ethhdr *vhdr;
6834 if (skb_header_cloned(skb) &&
6835 pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
6836 goto out_drop;
6837 vhdr = (struct vlan_ethhdr *)skb->data;
6838 vhdr->h_vlan_TCI = htons(tx_flags >>
6839 IXGBE_TX_FLAGS_VLAN_SHIFT);
6840 } else {
6841 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
6842 }
6843 }
6844
6845 /* record the location of the first descriptor for this packet */
6846 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
6847
6848 #ifdef IXGBE_FCOE
6849 /* setup tx offload for FCoE */
6850 if ((protocol == __constant_htons(ETH_P_FCOE)) &&
6851 (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) {
6852 tso = ixgbe_fso(tx_ring, skb, tx_flags, &hdr_len);
6853 if (tso < 0)
6854 goto out_drop;
6855 else if (tso)
6856 tx_flags |= IXGBE_TX_FLAGS_FSO |
6857 IXGBE_TX_FLAGS_FCOE;
6858 else
6859 tx_flags |= IXGBE_TX_FLAGS_FCOE;
6860
6861 goto xmit_fcoe;
6862 }
6863
6864 #endif /* IXGBE_FCOE */
6865 /* setup IPv4/IPv6 offloads */
6866 if (protocol == __constant_htons(ETH_P_IP))
6867 tx_flags |= IXGBE_TX_FLAGS_IPV4;
6868
6869 tso = ixgbe_tso(tx_ring, skb, tx_flags, protocol, &hdr_len);
6870 if (tso < 0)
6871 goto out_drop;
6872 else if (tso)
6873 tx_flags |= IXGBE_TX_FLAGS_TSO;
6874 else if (ixgbe_tx_csum(tx_ring, skb, tx_flags, protocol))
6875 tx_flags |= IXGBE_TX_FLAGS_CSUM;
6876
6877 /* add the ATR filter if ATR is on */
6878 if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state))
6879 ixgbe_atr(tx_ring, skb, tx_flags, protocol);
6880
6881 #ifdef IXGBE_FCOE
6882 xmit_fcoe:
6883 #endif /* IXGBE_FCOE */
6884 ixgbe_tx_map(tx_ring, skb, first, tx_flags, hdr_len);
6885
6886 ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);
6887
6888 return NETDEV_TX_OK;
6889
6890 out_drop:
6891 dev_kfree_skb_any(skb);
6892 return NETDEV_TX_OK;
6893 }
6894
6895 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
6896 {
6897 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6898 struct ixgbe_ring *tx_ring;
6899
6900 tx_ring = adapter->tx_ring[skb->queue_mapping];
6901 return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
6902 }
6903
6904 /**
6905 * ixgbe_set_mac - Change the Ethernet Address of the NIC
6906 * @netdev: network interface device structure
6907 * @p: pointer to an address structure
6908 *
6909 * Returns 0 on success, negative on failure
6910 **/
6911 static int ixgbe_set_mac(struct net_device *netdev, void *p)
6912 {
6913 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6914 struct ixgbe_hw *hw = &adapter->hw;
6915 struct sockaddr *addr = p;
6916
6917 if (!is_valid_ether_addr(addr->sa_data))
6918 return -EADDRNOTAVAIL;
6919
6920 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
6921 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
6922
6923 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
6924 IXGBE_RAH_AV);
6925
6926 return 0;
6927 }
6928
6929 static int
6930 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
6931 {
6932 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6933 struct ixgbe_hw *hw = &adapter->hw;
6934 u16 value;
6935 int rc;
6936
6937 if (prtad != hw->phy.mdio.prtad)
6938 return -EINVAL;
6939 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
6940 if (!rc)
6941 rc = value;
6942 return rc;
6943 }
6944
6945 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
6946 u16 addr, u16 value)
6947 {
6948 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6949 struct ixgbe_hw *hw = &adapter->hw;
6950
6951 if (prtad != hw->phy.mdio.prtad)
6952 return -EINVAL;
6953 return hw->phy.ops.write_reg(hw, addr, devad, value);
6954 }
6955
6956 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
6957 {
6958 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6959
6960 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
6961 }
6962
6963 /**
6964 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
6965 * netdev->dev_addrs
6966 * @netdev: network interface device structure
6967 *
6968 * Returns non-zero on failure
6969 **/
6970 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
6971 {
6972 int err = 0;
6973 struct ixgbe_adapter *adapter = netdev_priv(dev);
6974 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6975
6976 if (is_valid_ether_addr(mac->san_addr)) {
6977 rtnl_lock();
6978 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6979 rtnl_unlock();
6980 }
6981 return err;
6982 }
6983
6984 /**
6985 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
6986 * netdev->dev_addrs
6987 * @netdev: network interface device structure
6988 *
6989 * Returns non-zero on failure
6990 **/
6991 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
6992 {
6993 int err = 0;
6994 struct ixgbe_adapter *adapter = netdev_priv(dev);
6995 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6996
6997 if (is_valid_ether_addr(mac->san_addr)) {
6998 rtnl_lock();
6999 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
7000 rtnl_unlock();
7001 }
7002 return err;
7003 }
7004
7005 #ifdef CONFIG_NET_POLL_CONTROLLER
7006 /*
7007 * Polling 'interrupt' - used by things like netconsole to send skbs
7008 * without having to re-enable interrupts. It's not called while
7009 * the interrupt routine is executing.
7010 */
7011 static void ixgbe_netpoll(struct net_device *netdev)
7012 {
7013 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7014 int i;
7015
7016 /* if interface is down do nothing */
7017 if (test_bit(__IXGBE_DOWN, &adapter->state))
7018 return;
7019
7020 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
7021 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
7022 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
7023 for (i = 0; i < num_q_vectors; i++) {
7024 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
7025 ixgbe_msix_clean_rings(0, q_vector);
7026 }
7027 } else {
7028 ixgbe_intr(adapter->pdev->irq, netdev);
7029 }
7030 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
7031 }
7032 #endif
7033
7034 static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
7035 struct rtnl_link_stats64 *stats)
7036 {
7037 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7038 int i;
7039
7040 rcu_read_lock();
7041 for (i = 0; i < adapter->num_rx_queues; i++) {
7042 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]);
7043 u64 bytes, packets;
7044 unsigned int start;
7045
7046 if (ring) {
7047 do {
7048 start = u64_stats_fetch_begin_bh(&ring->syncp);
7049 packets = ring->stats.packets;
7050 bytes = ring->stats.bytes;
7051 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
7052 stats->rx_packets += packets;
7053 stats->rx_bytes += bytes;
7054 }
7055 }
7056
7057 for (i = 0; i < adapter->num_tx_queues; i++) {
7058 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->tx_ring[i]);
7059 u64 bytes, packets;
7060 unsigned int start;
7061
7062 if (ring) {
7063 do {
7064 start = u64_stats_fetch_begin_bh(&ring->syncp);
7065 packets = ring->stats.packets;
7066 bytes = ring->stats.bytes;
7067 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
7068 stats->tx_packets += packets;
7069 stats->tx_bytes += bytes;
7070 }
7071 }
7072 rcu_read_unlock();
7073 /* following stats updated by ixgbe_watchdog_task() */
7074 stats->multicast = netdev->stats.multicast;
7075 stats->rx_errors = netdev->stats.rx_errors;
7076 stats->rx_length_errors = netdev->stats.rx_length_errors;
7077 stats->rx_crc_errors = netdev->stats.rx_crc_errors;
7078 stats->rx_missed_errors = netdev->stats.rx_missed_errors;
7079 return stats;
7080 }
7081
7082 /* ixgbe_validate_rtr - verify 802.1Qp to Rx packet buffer mapping is valid.
7083 * #adapter: pointer to ixgbe_adapter
7084 * @tc: number of traffic classes currently enabled
7085 *
7086 * Configure a valid 802.1Qp to Rx packet buffer mapping ie confirm
7087 * 802.1Q priority maps to a packet buffer that exists.
7088 */
7089 static void ixgbe_validate_rtr(struct ixgbe_adapter *adapter, u8 tc)
7090 {
7091 struct ixgbe_hw *hw = &adapter->hw;
7092 u32 reg, rsave;
7093 int i;
7094
7095 /* 82598 have a static priority to TC mapping that can not
7096 * be changed so no validation is needed.
7097 */
7098 if (hw->mac.type == ixgbe_mac_82598EB)
7099 return;
7100
7101 reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC);
7102 rsave = reg;
7103
7104 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
7105 u8 up2tc = reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT);
7106
7107 /* If up2tc is out of bounds default to zero */
7108 if (up2tc > tc)
7109 reg &= ~(0x7 << IXGBE_RTRUP2TC_UP_SHIFT);
7110 }
7111
7112 if (reg != rsave)
7113 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
7114
7115 return;
7116 }
7117
7118
7119 /* ixgbe_setup_tc - routine to configure net_device for multiple traffic
7120 * classes.
7121 *
7122 * @netdev: net device to configure
7123 * @tc: number of traffic classes to enable
7124 */
7125 int ixgbe_setup_tc(struct net_device *dev, u8 tc)
7126 {
7127 struct ixgbe_adapter *adapter = netdev_priv(dev);
7128 struct ixgbe_hw *hw = &adapter->hw;
7129
7130 /* Multiple traffic classes requires multiple queues */
7131 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
7132 e_err(drv, "Enable failed, needs MSI-X\n");
7133 return -EINVAL;
7134 }
7135
7136 /* Hardware supports up to 8 traffic classes */
7137 if (tc > adapter->dcb_cfg.num_tcs.pg_tcs ||
7138 (hw->mac.type == ixgbe_mac_82598EB && tc < MAX_TRAFFIC_CLASS))
7139 return -EINVAL;
7140
7141 /* Hardware has to reinitialize queues and interrupts to
7142 * match packet buffer alignment. Unfortunately, the
7143 * hardware is not flexible enough to do this dynamically.
7144 */
7145 if (netif_running(dev))
7146 ixgbe_close(dev);
7147 ixgbe_clear_interrupt_scheme(adapter);
7148
7149 if (tc) {
7150 netdev_set_num_tc(dev, tc);
7151 adapter->last_lfc_mode = adapter->hw.fc.current_mode;
7152
7153 adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
7154 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
7155
7156 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
7157 adapter->hw.fc.requested_mode = ixgbe_fc_none;
7158 } else {
7159 netdev_reset_tc(dev);
7160
7161 adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
7162
7163 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
7164 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
7165
7166 adapter->temp_dcb_cfg.pfc_mode_enable = false;
7167 adapter->dcb_cfg.pfc_mode_enable = false;
7168 }
7169
7170 ixgbe_init_interrupt_scheme(adapter);
7171 ixgbe_validate_rtr(adapter, tc);
7172 if (netif_running(dev))
7173 ixgbe_open(dev);
7174
7175 return 0;
7176 }
7177
7178 void ixgbe_do_reset(struct net_device *netdev)
7179 {
7180 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7181
7182 if (netif_running(netdev))
7183 ixgbe_reinit_locked(adapter);
7184 else
7185 ixgbe_reset(adapter);
7186 }
7187
7188 static netdev_features_t ixgbe_fix_features(struct net_device *netdev,
7189 netdev_features_t data)
7190 {
7191 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7192
7193 #ifdef CONFIG_DCB
7194 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
7195 data &= ~NETIF_F_HW_VLAN_RX;
7196 #endif
7197
7198 /* return error if RXHASH is being enabled when RSS is not supported */
7199 if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED))
7200 data &= ~NETIF_F_RXHASH;
7201
7202 /* If Rx checksum is disabled, then RSC/LRO should also be disabled */
7203 if (!(data & NETIF_F_RXCSUM))
7204 data &= ~NETIF_F_LRO;
7205
7206 /* Turn off LRO if not RSC capable or invalid ITR settings */
7207 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)) {
7208 data &= ~NETIF_F_LRO;
7209 } else if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
7210 (adapter->rx_itr_setting != 1 &&
7211 adapter->rx_itr_setting > IXGBE_MAX_RSC_INT_RATE)) {
7212 data &= ~NETIF_F_LRO;
7213 e_info(probe, "rx-usecs set too low, not enabling RSC\n");
7214 }
7215
7216 return data;
7217 }
7218
7219 static int ixgbe_set_features(struct net_device *netdev,
7220 netdev_features_t data)
7221 {
7222 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7223 bool need_reset = false;
7224
7225 /* If Rx checksum is disabled, then RSC/LRO should also be disabled */
7226 if (!(data & NETIF_F_RXCSUM))
7227 adapter->flags &= ~IXGBE_FLAG_RX_CSUM_ENABLED;
7228 else
7229 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
7230
7231 /* Make sure RSC matches LRO, reset if change */
7232 if (!!(data & NETIF_F_LRO) !=
7233 !!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)) {
7234 adapter->flags2 ^= IXGBE_FLAG2_RSC_ENABLED;
7235 switch (adapter->hw.mac.type) {
7236 case ixgbe_mac_X540:
7237 case ixgbe_mac_82599EB:
7238 need_reset = true;
7239 break;
7240 default:
7241 break;
7242 }
7243 }
7244
7245 /*
7246 * Check if Flow Director n-tuple support was enabled or disabled. If
7247 * the state changed, we need to reset.
7248 */
7249 if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)) {
7250 /* turn off ATR, enable perfect filters and reset */
7251 if (data & NETIF_F_NTUPLE) {
7252 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
7253 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
7254 need_reset = true;
7255 }
7256 } else if (!(data & NETIF_F_NTUPLE)) {
7257 /* turn off Flow Director, set ATR and reset */
7258 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
7259 if ((adapter->flags & IXGBE_FLAG_RSS_ENABLED) &&
7260 !(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
7261 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
7262 need_reset = true;
7263 }
7264
7265 if (need_reset)
7266 ixgbe_do_reset(netdev);
7267
7268 return 0;
7269
7270 }
7271
7272 static const struct net_device_ops ixgbe_netdev_ops = {
7273 .ndo_open = ixgbe_open,
7274 .ndo_stop = ixgbe_close,
7275 .ndo_start_xmit = ixgbe_xmit_frame,
7276 .ndo_select_queue = ixgbe_select_queue,
7277 .ndo_set_rx_mode = ixgbe_set_rx_mode,
7278 .ndo_validate_addr = eth_validate_addr,
7279 .ndo_set_mac_address = ixgbe_set_mac,
7280 .ndo_change_mtu = ixgbe_change_mtu,
7281 .ndo_tx_timeout = ixgbe_tx_timeout,
7282 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
7283 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
7284 .ndo_do_ioctl = ixgbe_ioctl,
7285 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
7286 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
7287 .ndo_set_vf_tx_rate = ixgbe_ndo_set_vf_bw,
7288 .ndo_set_vf_spoofchk = ixgbe_ndo_set_vf_spoofchk,
7289 .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
7290 .ndo_get_stats64 = ixgbe_get_stats64,
7291 .ndo_setup_tc = ixgbe_setup_tc,
7292 #ifdef CONFIG_NET_POLL_CONTROLLER
7293 .ndo_poll_controller = ixgbe_netpoll,
7294 #endif
7295 #ifdef IXGBE_FCOE
7296 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
7297 .ndo_fcoe_ddp_target = ixgbe_fcoe_ddp_target,
7298 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
7299 .ndo_fcoe_enable = ixgbe_fcoe_enable,
7300 .ndo_fcoe_disable = ixgbe_fcoe_disable,
7301 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
7302 .ndo_fcoe_get_hbainfo = ixgbe_fcoe_get_hbainfo,
7303 #endif /* IXGBE_FCOE */
7304 .ndo_set_features = ixgbe_set_features,
7305 .ndo_fix_features = ixgbe_fix_features,
7306 };
7307
7308 static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter,
7309 const struct ixgbe_info *ii)
7310 {
7311 #ifdef CONFIG_PCI_IOV
7312 struct ixgbe_hw *hw = &adapter->hw;
7313
7314 if (hw->mac.type == ixgbe_mac_82598EB)
7315 return;
7316
7317 /* The 82599 supports up to 64 VFs per physical function
7318 * but this implementation limits allocation to 63 so that
7319 * basic networking resources are still available to the
7320 * physical function
7321 */
7322 adapter->num_vfs = (max_vfs > 63) ? 63 : max_vfs;
7323 ixgbe_enable_sriov(adapter, ii);
7324 #endif /* CONFIG_PCI_IOV */
7325 }
7326
7327 /**
7328 * ixgbe_probe - Device Initialization Routine
7329 * @pdev: PCI device information struct
7330 * @ent: entry in ixgbe_pci_tbl
7331 *
7332 * Returns 0 on success, negative on failure
7333 *
7334 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
7335 * The OS initialization, configuring of the adapter private structure,
7336 * and a hardware reset occur.
7337 **/
7338 static int __devinit ixgbe_probe(struct pci_dev *pdev,
7339 const struct pci_device_id *ent)
7340 {
7341 struct net_device *netdev;
7342 struct ixgbe_adapter *adapter = NULL;
7343 struct ixgbe_hw *hw;
7344 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
7345 static int cards_found;
7346 int i, err, pci_using_dac;
7347 u8 part_str[IXGBE_PBANUM_LENGTH];
7348 unsigned int indices = num_possible_cpus();
7349 #ifdef IXGBE_FCOE
7350 u16 device_caps;
7351 #endif
7352 u32 eec;
7353 u16 wol_cap;
7354
7355 /* Catch broken hardware that put the wrong VF device ID in
7356 * the PCIe SR-IOV capability.
7357 */
7358 if (pdev->is_virtfn) {
7359 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
7360 pci_name(pdev), pdev->vendor, pdev->device);
7361 return -EINVAL;
7362 }
7363
7364 err = pci_enable_device_mem(pdev);
7365 if (err)
7366 return err;
7367
7368 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
7369 !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
7370 pci_using_dac = 1;
7371 } else {
7372 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
7373 if (err) {
7374 err = dma_set_coherent_mask(&pdev->dev,
7375 DMA_BIT_MASK(32));
7376 if (err) {
7377 dev_err(&pdev->dev,
7378 "No usable DMA configuration, aborting\n");
7379 goto err_dma;
7380 }
7381 }
7382 pci_using_dac = 0;
7383 }
7384
7385 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
7386 IORESOURCE_MEM), ixgbe_driver_name);
7387 if (err) {
7388 dev_err(&pdev->dev,
7389 "pci_request_selected_regions failed 0x%x\n", err);
7390 goto err_pci_reg;
7391 }
7392
7393 pci_enable_pcie_error_reporting(pdev);
7394
7395 pci_set_master(pdev);
7396 pci_save_state(pdev);
7397
7398 #ifdef CONFIG_IXGBE_DCB
7399 indices *= MAX_TRAFFIC_CLASS;
7400 #endif
7401
7402 if (ii->mac == ixgbe_mac_82598EB)
7403 indices = min_t(unsigned int, indices, IXGBE_MAX_RSS_INDICES);
7404 else
7405 indices = min_t(unsigned int, indices, IXGBE_MAX_FDIR_INDICES);
7406
7407 #ifdef IXGBE_FCOE
7408 indices += min_t(unsigned int, num_possible_cpus(),
7409 IXGBE_MAX_FCOE_INDICES);
7410 #endif
7411 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
7412 if (!netdev) {
7413 err = -ENOMEM;
7414 goto err_alloc_etherdev;
7415 }
7416
7417 SET_NETDEV_DEV(netdev, &pdev->dev);
7418
7419 adapter = netdev_priv(netdev);
7420 pci_set_drvdata(pdev, adapter);
7421
7422 adapter->netdev = netdev;
7423 adapter->pdev = pdev;
7424 hw = &adapter->hw;
7425 hw->back = adapter;
7426 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
7427
7428 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
7429 pci_resource_len(pdev, 0));
7430 if (!hw->hw_addr) {
7431 err = -EIO;
7432 goto err_ioremap;
7433 }
7434
7435 for (i = 1; i <= 5; i++) {
7436 if (pci_resource_len(pdev, i) == 0)
7437 continue;
7438 }
7439
7440 netdev->netdev_ops = &ixgbe_netdev_ops;
7441 ixgbe_set_ethtool_ops(netdev);
7442 netdev->watchdog_timeo = 5 * HZ;
7443 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
7444
7445 adapter->bd_number = cards_found;
7446
7447 /* Setup hw api */
7448 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
7449 hw->mac.type = ii->mac;
7450
7451 /* EEPROM */
7452 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
7453 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
7454 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
7455 if (!(eec & (1 << 8)))
7456 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
7457
7458 /* PHY */
7459 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
7460 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
7461 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
7462 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
7463 hw->phy.mdio.mmds = 0;
7464 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
7465 hw->phy.mdio.dev = netdev;
7466 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
7467 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
7468
7469 ii->get_invariants(hw);
7470
7471 /* setup the private structure */
7472 err = ixgbe_sw_init(adapter);
7473 if (err)
7474 goto err_sw_init;
7475
7476 /* Make it possible the adapter to be woken up via WOL */
7477 switch (adapter->hw.mac.type) {
7478 case ixgbe_mac_82599EB:
7479 case ixgbe_mac_X540:
7480 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7481 break;
7482 default:
7483 break;
7484 }
7485
7486 /*
7487 * If there is a fan on this device and it has failed log the
7488 * failure.
7489 */
7490 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
7491 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
7492 if (esdp & IXGBE_ESDP_SDP1)
7493 e_crit(probe, "Fan has stopped, replace the adapter\n");
7494 }
7495
7496 /* reset_hw fills in the perm_addr as well */
7497 hw->phy.reset_if_overtemp = true;
7498 err = hw->mac.ops.reset_hw(hw);
7499 hw->phy.reset_if_overtemp = false;
7500 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
7501 hw->mac.type == ixgbe_mac_82598EB) {
7502 err = 0;
7503 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
7504 e_dev_err("failed to load because an unsupported SFP+ "
7505 "module type was detected.\n");
7506 e_dev_err("Reload the driver after installing a supported "
7507 "module.\n");
7508 goto err_sw_init;
7509 } else if (err) {
7510 e_dev_err("HW Init failed: %d\n", err);
7511 goto err_sw_init;
7512 }
7513
7514 ixgbe_probe_vf(adapter, ii);
7515
7516 netdev->features = NETIF_F_SG |
7517 NETIF_F_IP_CSUM |
7518 NETIF_F_IPV6_CSUM |
7519 NETIF_F_HW_VLAN_TX |
7520 NETIF_F_HW_VLAN_RX |
7521 NETIF_F_HW_VLAN_FILTER |
7522 NETIF_F_TSO |
7523 NETIF_F_TSO6 |
7524 NETIF_F_RXHASH |
7525 NETIF_F_RXCSUM;
7526
7527 netdev->hw_features = netdev->features;
7528
7529 switch (adapter->hw.mac.type) {
7530 case ixgbe_mac_82599EB:
7531 case ixgbe_mac_X540:
7532 netdev->features |= NETIF_F_SCTP_CSUM;
7533 netdev->hw_features |= NETIF_F_SCTP_CSUM |
7534 NETIF_F_NTUPLE;
7535 break;
7536 default:
7537 break;
7538 }
7539
7540 netdev->vlan_features |= NETIF_F_TSO;
7541 netdev->vlan_features |= NETIF_F_TSO6;
7542 netdev->vlan_features |= NETIF_F_IP_CSUM;
7543 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
7544 netdev->vlan_features |= NETIF_F_SG;
7545
7546 netdev->priv_flags |= IFF_UNICAST_FLT;
7547
7548 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7549 adapter->flags &= ~(IXGBE_FLAG_RSS_ENABLED |
7550 IXGBE_FLAG_DCB_ENABLED);
7551
7552 #ifdef CONFIG_IXGBE_DCB
7553 netdev->dcbnl_ops = &dcbnl_ops;
7554 #endif
7555
7556 #ifdef IXGBE_FCOE
7557 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
7558 if (hw->mac.ops.get_device_caps) {
7559 hw->mac.ops.get_device_caps(hw, &device_caps);
7560 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
7561 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
7562 }
7563 }
7564 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
7565 netdev->vlan_features |= NETIF_F_FCOE_CRC;
7566 netdev->vlan_features |= NETIF_F_FSO;
7567 netdev->vlan_features |= NETIF_F_FCOE_MTU;
7568 }
7569 #endif /* IXGBE_FCOE */
7570 if (pci_using_dac) {
7571 netdev->features |= NETIF_F_HIGHDMA;
7572 netdev->vlan_features |= NETIF_F_HIGHDMA;
7573 }
7574
7575 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
7576 netdev->hw_features |= NETIF_F_LRO;
7577 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
7578 netdev->features |= NETIF_F_LRO;
7579
7580 /* make sure the EEPROM is good */
7581 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
7582 e_dev_err("The EEPROM Checksum Is Not Valid\n");
7583 err = -EIO;
7584 goto err_eeprom;
7585 }
7586
7587 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
7588 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
7589
7590 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
7591 e_dev_err("invalid MAC address\n");
7592 err = -EIO;
7593 goto err_eeprom;
7594 }
7595
7596 setup_timer(&adapter->service_timer, &ixgbe_service_timer,
7597 (unsigned long) adapter);
7598
7599 INIT_WORK(&adapter->service_task, ixgbe_service_task);
7600 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
7601
7602 err = ixgbe_init_interrupt_scheme(adapter);
7603 if (err)
7604 goto err_sw_init;
7605
7606 if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED)) {
7607 netdev->hw_features &= ~NETIF_F_RXHASH;
7608 netdev->features &= ~NETIF_F_RXHASH;
7609 }
7610
7611 /* WOL not supported for all but the following */
7612 adapter->wol = 0;
7613 switch (pdev->device) {
7614 case IXGBE_DEV_ID_82599_SFP:
7615 /* Only these subdevice supports WOL */
7616 switch (pdev->subsystem_device) {
7617 case IXGBE_SUBDEV_ID_82599_560FLR:
7618 /* only support first port */
7619 if (hw->bus.func != 0)
7620 break;
7621 case IXGBE_SUBDEV_ID_82599_SFP:
7622 adapter->wol = IXGBE_WUFC_MAG;
7623 break;
7624 }
7625 break;
7626 case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
7627 /* All except this subdevice support WOL */
7628 if (pdev->subsystem_device != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ)
7629 adapter->wol = IXGBE_WUFC_MAG;
7630 break;
7631 case IXGBE_DEV_ID_82599_KX4:
7632 adapter->wol = IXGBE_WUFC_MAG;
7633 break;
7634 case IXGBE_DEV_ID_X540T:
7635 /* Check eeprom to see if it is enabled */
7636 hw->eeprom.ops.read(hw, 0x2c, &adapter->eeprom_cap);
7637 wol_cap = adapter->eeprom_cap & IXGBE_DEVICE_CAPS_WOL_MASK;
7638
7639 if ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0_1) ||
7640 ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0) &&
7641 (hw->bus.func == 0)))
7642 adapter->wol = IXGBE_WUFC_MAG;
7643 break;
7644 }
7645 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
7646
7647 /* save off EEPROM version number */
7648 hw->eeprom.ops.read(hw, 0x2e, &adapter->eeprom_verh);
7649 hw->eeprom.ops.read(hw, 0x2d, &adapter->eeprom_verl);
7650
7651 /* pick up the PCI bus settings for reporting later */
7652 hw->mac.ops.get_bus_info(hw);
7653
7654 /* print bus type/speed/width info */
7655 e_dev_info("(PCI Express:%s:%s) %pM\n",
7656 (hw->bus.speed == ixgbe_bus_speed_5000 ? "5.0GT/s" :
7657 hw->bus.speed == ixgbe_bus_speed_2500 ? "2.5GT/s" :
7658 "Unknown"),
7659 (hw->bus.width == ixgbe_bus_width_pcie_x8 ? "Width x8" :
7660 hw->bus.width == ixgbe_bus_width_pcie_x4 ? "Width x4" :
7661 hw->bus.width == ixgbe_bus_width_pcie_x1 ? "Width x1" :
7662 "Unknown"),
7663 netdev->dev_addr);
7664
7665 err = ixgbe_read_pba_string_generic(hw, part_str, IXGBE_PBANUM_LENGTH);
7666 if (err)
7667 strncpy(part_str, "Unknown", IXGBE_PBANUM_LENGTH);
7668 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
7669 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, PBA No: %s\n",
7670 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
7671 part_str);
7672 else
7673 e_dev_info("MAC: %d, PHY: %d, PBA No: %s\n",
7674 hw->mac.type, hw->phy.type, part_str);
7675
7676 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
7677 e_dev_warn("PCI-Express bandwidth available for this card is "
7678 "not sufficient for optimal performance.\n");
7679 e_dev_warn("For optimal performance a x8 PCI-Express slot "
7680 "is required.\n");
7681 }
7682
7683 /* reset the hardware with the new settings */
7684 err = hw->mac.ops.start_hw(hw);
7685
7686 if (err == IXGBE_ERR_EEPROM_VERSION) {
7687 /* We are running on a pre-production device, log a warning */
7688 e_dev_warn("This device is a pre-production adapter/LOM. "
7689 "Please be aware there may be issues associated "
7690 "with your hardware. If you are experiencing "
7691 "problems please contact your Intel or hardware "
7692 "representative who provided you with this "
7693 "hardware.\n");
7694 }
7695 strcpy(netdev->name, "eth%d");
7696 err = register_netdev(netdev);
7697 if (err)
7698 goto err_register;
7699
7700 /* power down the optics for multispeed fiber and 82599 SFP+ fiber */
7701 if (hw->mac.ops.disable_tx_laser &&
7702 ((hw->phy.multispeed_fiber) ||
7703 ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
7704 (hw->mac.type == ixgbe_mac_82599EB))))
7705 hw->mac.ops.disable_tx_laser(hw);
7706
7707 /* carrier off reporting is important to ethtool even BEFORE open */
7708 netif_carrier_off(netdev);
7709
7710 #ifdef CONFIG_IXGBE_DCA
7711 if (dca_add_requester(&pdev->dev) == 0) {
7712 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
7713 ixgbe_setup_dca(adapter);
7714 }
7715 #endif
7716 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
7717 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
7718 for (i = 0; i < adapter->num_vfs; i++)
7719 ixgbe_vf_configuration(pdev, (i | 0x10000000));
7720 }
7721
7722 /* firmware requires driver version to be 0xFFFFFFFF
7723 * since os does not support feature
7724 */
7725 if (hw->mac.ops.set_fw_drv_ver)
7726 hw->mac.ops.set_fw_drv_ver(hw, 0xFF, 0xFF, 0xFF,
7727 0xFF);
7728
7729 /* add san mac addr to netdev */
7730 ixgbe_add_sanmac_netdev(netdev);
7731
7732 e_dev_info("%s\n", ixgbe_default_device_descr);
7733 cards_found++;
7734 return 0;
7735
7736 err_register:
7737 ixgbe_release_hw_control(adapter);
7738 ixgbe_clear_interrupt_scheme(adapter);
7739 err_sw_init:
7740 err_eeprom:
7741 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7742 ixgbe_disable_sriov(adapter);
7743 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
7744 iounmap(hw->hw_addr);
7745 err_ioremap:
7746 free_netdev(netdev);
7747 err_alloc_etherdev:
7748 pci_release_selected_regions(pdev,
7749 pci_select_bars(pdev, IORESOURCE_MEM));
7750 err_pci_reg:
7751 err_dma:
7752 pci_disable_device(pdev);
7753 return err;
7754 }
7755
7756 /**
7757 * ixgbe_remove - Device Removal Routine
7758 * @pdev: PCI device information struct
7759 *
7760 * ixgbe_remove is called by the PCI subsystem to alert the driver
7761 * that it should release a PCI device. The could be caused by a
7762 * Hot-Plug event, or because the driver is going to be removed from
7763 * memory.
7764 **/
7765 static void __devexit ixgbe_remove(struct pci_dev *pdev)
7766 {
7767 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7768 struct net_device *netdev = adapter->netdev;
7769
7770 set_bit(__IXGBE_DOWN, &adapter->state);
7771 cancel_work_sync(&adapter->service_task);
7772
7773 #ifdef CONFIG_IXGBE_DCA
7774 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
7775 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
7776 dca_remove_requester(&pdev->dev);
7777 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
7778 }
7779
7780 #endif
7781 #ifdef IXGBE_FCOE
7782 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
7783 ixgbe_cleanup_fcoe(adapter);
7784
7785 #endif /* IXGBE_FCOE */
7786
7787 /* remove the added san mac */
7788 ixgbe_del_sanmac_netdev(netdev);
7789
7790 if (netdev->reg_state == NETREG_REGISTERED)
7791 unregister_netdev(netdev);
7792
7793 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
7794 if (!(ixgbe_check_vf_assignment(adapter)))
7795 ixgbe_disable_sriov(adapter);
7796 else
7797 e_dev_warn("Unloading driver while VFs are assigned "
7798 "- VFs will not be deallocated\n");
7799 }
7800
7801 ixgbe_clear_interrupt_scheme(adapter);
7802
7803 ixgbe_release_hw_control(adapter);
7804
7805 iounmap(adapter->hw.hw_addr);
7806 pci_release_selected_regions(pdev, pci_select_bars(pdev,
7807 IORESOURCE_MEM));
7808
7809 e_dev_info("complete\n");
7810
7811 free_netdev(netdev);
7812
7813 pci_disable_pcie_error_reporting(pdev);
7814
7815 pci_disable_device(pdev);
7816 }
7817
7818 /**
7819 * ixgbe_io_error_detected - called when PCI error is detected
7820 * @pdev: Pointer to PCI device
7821 * @state: The current pci connection state
7822 *
7823 * This function is called after a PCI bus error affecting
7824 * this device has been detected.
7825 */
7826 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
7827 pci_channel_state_t state)
7828 {
7829 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7830 struct net_device *netdev = adapter->netdev;
7831
7832 #ifdef CONFIG_PCI_IOV
7833 struct pci_dev *bdev, *vfdev;
7834 u32 dw0, dw1, dw2, dw3;
7835 int vf, pos;
7836 u16 req_id, pf_func;
7837
7838 if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
7839 adapter->num_vfs == 0)
7840 goto skip_bad_vf_detection;
7841
7842 bdev = pdev->bus->self;
7843 while (bdev && (bdev->pcie_type != PCI_EXP_TYPE_ROOT_PORT))
7844 bdev = bdev->bus->self;
7845
7846 if (!bdev)
7847 goto skip_bad_vf_detection;
7848
7849 pos = pci_find_ext_capability(bdev, PCI_EXT_CAP_ID_ERR);
7850 if (!pos)
7851 goto skip_bad_vf_detection;
7852
7853 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG, &dw0);
7854 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 4, &dw1);
7855 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 8, &dw2);
7856 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 12, &dw3);
7857
7858 req_id = dw1 >> 16;
7859 /* On the 82599 if bit 7 of the requestor ID is set then it's a VF */
7860 if (!(req_id & 0x0080))
7861 goto skip_bad_vf_detection;
7862
7863 pf_func = req_id & 0x01;
7864 if ((pf_func & 1) == (pdev->devfn & 1)) {
7865 unsigned int device_id;
7866
7867 vf = (req_id & 0x7F) >> 1;
7868 e_dev_err("VF %d has caused a PCIe error\n", vf);
7869 e_dev_err("TLP: dw0: %8.8x\tdw1: %8.8x\tdw2: "
7870 "%8.8x\tdw3: %8.8x\n",
7871 dw0, dw1, dw2, dw3);
7872 switch (adapter->hw.mac.type) {
7873 case ixgbe_mac_82599EB:
7874 device_id = IXGBE_82599_VF_DEVICE_ID;
7875 break;
7876 case ixgbe_mac_X540:
7877 device_id = IXGBE_X540_VF_DEVICE_ID;
7878 break;
7879 default:
7880 device_id = 0;
7881 break;
7882 }
7883
7884 /* Find the pci device of the offending VF */
7885 vfdev = pci_get_device(IXGBE_INTEL_VENDOR_ID, device_id, NULL);
7886 while (vfdev) {
7887 if (vfdev->devfn == (req_id & 0xFF))
7888 break;
7889 vfdev = pci_get_device(IXGBE_INTEL_VENDOR_ID,
7890 device_id, vfdev);
7891 }
7892 /*
7893 * There's a slim chance the VF could have been hot plugged,
7894 * so if it is no longer present we don't need to issue the
7895 * VFLR. Just clean up the AER in that case.
7896 */
7897 if (vfdev) {
7898 e_dev_err("Issuing VFLR to VF %d\n", vf);
7899 pci_write_config_dword(vfdev, 0xA8, 0x00008000);
7900 }
7901
7902 pci_cleanup_aer_uncorrect_error_status(pdev);
7903 }
7904
7905 /*
7906 * Even though the error may have occurred on the other port
7907 * we still need to increment the vf error reference count for
7908 * both ports because the I/O resume function will be called
7909 * for both of them.
7910 */
7911 adapter->vferr_refcount++;
7912
7913 return PCI_ERS_RESULT_RECOVERED;
7914
7915 skip_bad_vf_detection:
7916 #endif /* CONFIG_PCI_IOV */
7917 netif_device_detach(netdev);
7918
7919 if (state == pci_channel_io_perm_failure)
7920 return PCI_ERS_RESULT_DISCONNECT;
7921
7922 if (netif_running(netdev))
7923 ixgbe_down(adapter);
7924 pci_disable_device(pdev);
7925
7926 /* Request a slot reset. */
7927 return PCI_ERS_RESULT_NEED_RESET;
7928 }
7929
7930 /**
7931 * ixgbe_io_slot_reset - called after the pci bus has been reset.
7932 * @pdev: Pointer to PCI device
7933 *
7934 * Restart the card from scratch, as if from a cold-boot.
7935 */
7936 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
7937 {
7938 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7939 pci_ers_result_t result;
7940 int err;
7941
7942 if (pci_enable_device_mem(pdev)) {
7943 e_err(probe, "Cannot re-enable PCI device after reset.\n");
7944 result = PCI_ERS_RESULT_DISCONNECT;
7945 } else {
7946 pci_set_master(pdev);
7947 pci_restore_state(pdev);
7948 pci_save_state(pdev);
7949
7950 pci_wake_from_d3(pdev, false);
7951
7952 ixgbe_reset(adapter);
7953 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7954 result = PCI_ERS_RESULT_RECOVERED;
7955 }
7956
7957 err = pci_cleanup_aer_uncorrect_error_status(pdev);
7958 if (err) {
7959 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
7960 "failed 0x%0x\n", err);
7961 /* non-fatal, continue */
7962 }
7963
7964 return result;
7965 }
7966
7967 /**
7968 * ixgbe_io_resume - called when traffic can start flowing again.
7969 * @pdev: Pointer to PCI device
7970 *
7971 * This callback is called when the error recovery driver tells us that
7972 * its OK to resume normal operation.
7973 */
7974 static void ixgbe_io_resume(struct pci_dev *pdev)
7975 {
7976 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7977 struct net_device *netdev = adapter->netdev;
7978
7979 #ifdef CONFIG_PCI_IOV
7980 if (adapter->vferr_refcount) {
7981 e_info(drv, "Resuming after VF err\n");
7982 adapter->vferr_refcount--;
7983 return;
7984 }
7985
7986 #endif
7987 if (netif_running(netdev))
7988 ixgbe_up(adapter);
7989
7990 netif_device_attach(netdev);
7991 }
7992
7993 static struct pci_error_handlers ixgbe_err_handler = {
7994 .error_detected = ixgbe_io_error_detected,
7995 .slot_reset = ixgbe_io_slot_reset,
7996 .resume = ixgbe_io_resume,
7997 };
7998
7999 static struct pci_driver ixgbe_driver = {
8000 .name = ixgbe_driver_name,
8001 .id_table = ixgbe_pci_tbl,
8002 .probe = ixgbe_probe,
8003 .remove = __devexit_p(ixgbe_remove),
8004 #ifdef CONFIG_PM
8005 .suspend = ixgbe_suspend,
8006 .resume = ixgbe_resume,
8007 #endif
8008 .shutdown = ixgbe_shutdown,
8009 .err_handler = &ixgbe_err_handler
8010 };
8011
8012 /**
8013 * ixgbe_init_module - Driver Registration Routine
8014 *
8015 * ixgbe_init_module is the first routine called when the driver is
8016 * loaded. All it does is register with the PCI subsystem.
8017 **/
8018 static int __init ixgbe_init_module(void)
8019 {
8020 int ret;
8021 pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
8022 pr_info("%s\n", ixgbe_copyright);
8023
8024 #ifdef CONFIG_IXGBE_DCA
8025 dca_register_notify(&dca_notifier);
8026 #endif
8027
8028 ret = pci_register_driver(&ixgbe_driver);
8029 return ret;
8030 }
8031
8032 module_init(ixgbe_init_module);
8033
8034 /**
8035 * ixgbe_exit_module - Driver Exit Cleanup Routine
8036 *
8037 * ixgbe_exit_module is called just before the driver is removed
8038 * from memory.
8039 **/
8040 static void __exit ixgbe_exit_module(void)
8041 {
8042 #ifdef CONFIG_IXGBE_DCA
8043 dca_unregister_notify(&dca_notifier);
8044 #endif
8045 pci_unregister_driver(&ixgbe_driver);
8046 rcu_barrier(); /* Wait for completion of call_rcu()'s */
8047 }
8048
8049 #ifdef CONFIG_IXGBE_DCA
8050 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
8051 void *p)
8052 {
8053 int ret_val;
8054
8055 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
8056 __ixgbe_notify_dca);
8057
8058 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
8059 }
8060
8061 #endif /* CONFIG_IXGBE_DCA */
8062
8063 module_exit(ixgbe_exit_module);
8064
8065 /* ixgbe_main.c */