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ixgbe: remove residual code left over from earlier combining of TXDCTL
[linux/fpc-iii.git] / drivers / net / ixgbe / ixgbe_main.c
blobdd73ebc545d32f5517066aa7e3d3e11137dfcea2
1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2010 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26 *******************************************************************************/
27
28 #include <linux/types.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/netdevice.h>
32 #include <linux/vmalloc.h>
33 #include <linux/string.h>
34 #include <linux/in.h>
35 #include <linux/ip.h>
36 #include <linux/tcp.h>
37 #include <linux/pkt_sched.h>
38 #include <linux/ipv6.h>
39 #include <linux/slab.h>
40 #include <net/checksum.h>
41 #include <net/ip6_checksum.h>
42 #include <linux/ethtool.h>
43 #include <linux/if_vlan.h>
44 #include <scsi/fc/fc_fcoe.h>
45
46 #include "ixgbe.h"
47 #include "ixgbe_common.h"
48 #include "ixgbe_dcb_82599.h"
49 #include "ixgbe_sriov.h"
50
51 char ixgbe_driver_name[] = "ixgbe";
52 static const char ixgbe_driver_string[] =
53 "Intel(R) 10 Gigabit PCI Express Network Driver";
54
55 #define DRV_VERSION "2.0.84-k2"
56 const char ixgbe_driver_version[] = DRV_VERSION;
57 static char ixgbe_copyright[] = "Copyright (c) 1999-2010 Intel Corporation.";
58
59 static const struct ixgbe_info *ixgbe_info_tbl[] = {
60 [board_82598] = &ixgbe_82598_info,
61 [board_82599] = &ixgbe_82599_info,
62 };
63
64 /* ixgbe_pci_tbl - PCI Device ID Table
65 *
66 * Wildcard entries (PCI_ANY_ID) should come last
67 * Last entry must be all 0s
68 *
69 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
70 * Class, Class Mask, private data (not used) }
71 */
72 static DEFINE_PCI_DEVICE_TABLE(ixgbe_pci_tbl) = {
73 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598),
74 board_82598 },
75 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
76 board_82598 },
77 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
78 board_82598 },
79 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT),
80 board_82598 },
81 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2),
82 board_82598 },
83 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
84 board_82598 },
85 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT),
86 board_82598 },
87 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT),
88 board_82598 },
89 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM),
90 board_82598 },
91 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR),
92 board_82598 },
93 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM),
94 board_82598 },
95 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX),
96 board_82598 },
97 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4),
98 board_82599 },
99 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM),
100 board_82599 },
101 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR),
102 board_82599 },
103 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP),
104 board_82599 },
105 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM),
106 board_82599 },
107 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ),
108 board_82599 },
109 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4),
110 board_82599 },
111 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM),
112 board_82599 },
113 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE),
114 board_82599 },
115
116 /* required last entry */
117 {0, }
118 };
119 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
120
121 #ifdef CONFIG_IXGBE_DCA
122 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
123 void *p);
124 static struct notifier_block dca_notifier = {
125 .notifier_call = ixgbe_notify_dca,
126 .next = NULL,
127 .priority = 0
128 };
129 #endif
130
131 #ifdef CONFIG_PCI_IOV
132 static unsigned int max_vfs;
133 module_param(max_vfs, uint, 0);
134 MODULE_PARM_DESC(max_vfs,
135 "Maximum number of virtual functions to allocate per physical function");
136 #endif /* CONFIG_PCI_IOV */
137
138 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
139 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
140 MODULE_LICENSE("GPL");
141 MODULE_VERSION(DRV_VERSION);
142
143 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
144
145 static inline void ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
146 {
147 struct ixgbe_hw *hw = &adapter->hw;
148 u32 gcr;
149 u32 gpie;
150 u32 vmdctl;
151
152 #ifdef CONFIG_PCI_IOV
153 /* disable iov and allow time for transactions to clear */
154 pci_disable_sriov(adapter->pdev);
155 #endif
156
157 /* turn off device IOV mode */
158 gcr = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
159 gcr &= ~(IXGBE_GCR_EXT_SRIOV);
160 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr);
161 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
162 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
163 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
164
165 /* set default pool back to 0 */
166 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
167 vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
168 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
169
170 /* take a breather then clean up driver data */
171 msleep(100);
172
173 kfree(adapter->vfinfo);
174 adapter->vfinfo = NULL;
175
176 adapter->num_vfs = 0;
177 adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
178 }
179
180 struct ixgbe_reg_info {
181 u32 ofs;
182 char *name;
183 };
184
185 static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {
186
187 /* General Registers */
188 {IXGBE_CTRL, "CTRL"},
189 {IXGBE_STATUS, "STATUS"},
190 {IXGBE_CTRL_EXT, "CTRL_EXT"},
191
192 /* Interrupt Registers */
193 {IXGBE_EICR, "EICR"},
194
195 /* RX Registers */
196 {IXGBE_SRRCTL(0), "SRRCTL"},
197 {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
198 {IXGBE_RDLEN(0), "RDLEN"},
199 {IXGBE_RDH(0), "RDH"},
200 {IXGBE_RDT(0), "RDT"},
201 {IXGBE_RXDCTL(0), "RXDCTL"},
202 {IXGBE_RDBAL(0), "RDBAL"},
203 {IXGBE_RDBAH(0), "RDBAH"},
204
205 /* TX Registers */
206 {IXGBE_TDBAL(0), "TDBAL"},
207 {IXGBE_TDBAH(0), "TDBAH"},
208 {IXGBE_TDLEN(0), "TDLEN"},
209 {IXGBE_TDH(0), "TDH"},
210 {IXGBE_TDT(0), "TDT"},
211 {IXGBE_TXDCTL(0), "TXDCTL"},
212
213 /* List Terminator */
214 {}
215 };
216
217
218 /*
219 * ixgbe_regdump - register printout routine
220 */
221 static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
222 {
223 int i = 0, j = 0;
224 char rname[16];
225 u32 regs[64];
226
227 switch (reginfo->ofs) {
228 case IXGBE_SRRCTL(0):
229 for (i = 0; i < 64; i++)
230 regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
231 break;
232 case IXGBE_DCA_RXCTRL(0):
233 for (i = 0; i < 64; i++)
234 regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
235 break;
236 case IXGBE_RDLEN(0):
237 for (i = 0; i < 64; i++)
238 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
239 break;
240 case IXGBE_RDH(0):
241 for (i = 0; i < 64; i++)
242 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
243 break;
244 case IXGBE_RDT(0):
245 for (i = 0; i < 64; i++)
246 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
247 break;
248 case IXGBE_RXDCTL(0):
249 for (i = 0; i < 64; i++)
250 regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
251 break;
252 case IXGBE_RDBAL(0):
253 for (i = 0; i < 64; i++)
254 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
255 break;
256 case IXGBE_RDBAH(0):
257 for (i = 0; i < 64; i++)
258 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
259 break;
260 case IXGBE_TDBAL(0):
261 for (i = 0; i < 64; i++)
262 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
263 break;
264 case IXGBE_TDBAH(0):
265 for (i = 0; i < 64; i++)
266 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
267 break;
268 case IXGBE_TDLEN(0):
269 for (i = 0; i < 64; i++)
270 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
271 break;
272 case IXGBE_TDH(0):
273 for (i = 0; i < 64; i++)
274 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
275 break;
276 case IXGBE_TDT(0):
277 for (i = 0; i < 64; i++)
278 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
279 break;
280 case IXGBE_TXDCTL(0):
281 for (i = 0; i < 64; i++)
282 regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
283 break;
284 default:
285 pr_info("%-15s %08x\n", reginfo->name,
286 IXGBE_READ_REG(hw, reginfo->ofs));
287 return;
288 }
289
290 for (i = 0; i < 8; i++) {
291 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7);
292 pr_err("%-15s", rname);
293 for (j = 0; j < 8; j++)
294 pr_cont(" %08x", regs[i*8+j]);
295 pr_cont("\n");
296 }
297
298 }
299
300 /*
301 * ixgbe_dump - Print registers, tx-rings and rx-rings
302 */
303 static void ixgbe_dump(struct ixgbe_adapter *adapter)
304 {
305 struct net_device *netdev = adapter->netdev;
306 struct ixgbe_hw *hw = &adapter->hw;
307 struct ixgbe_reg_info *reginfo;
308 int n = 0;
309 struct ixgbe_ring *tx_ring;
310 struct ixgbe_tx_buffer *tx_buffer_info;
311 union ixgbe_adv_tx_desc *tx_desc;
312 struct my_u0 { u64 a; u64 b; } *u0;
313 struct ixgbe_ring *rx_ring;
314 union ixgbe_adv_rx_desc *rx_desc;
315 struct ixgbe_rx_buffer *rx_buffer_info;
316 u32 staterr;
317 int i = 0;
318
319 if (!netif_msg_hw(adapter))
320 return;
321
322 /* Print netdevice Info */
323 if (netdev) {
324 dev_info(&adapter->pdev->dev, "Net device Info\n");
325 pr_info("Device Name state "
326 "trans_start last_rx\n");
327 pr_info("%-15s %016lX %016lX %016lX\n",
328 netdev->name,
329 netdev->state,
330 netdev->trans_start,
331 netdev->last_rx);
332 }
333
334 /* Print Registers */
335 dev_info(&adapter->pdev->dev, "Register Dump\n");
336 pr_info(" Register Name Value\n");
337 for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
338 reginfo->name; reginfo++) {
339 ixgbe_regdump(hw, reginfo);
340 }
341
342 /* Print TX Ring Summary */
343 if (!netdev || !netif_running(netdev))
344 goto exit;
345
346 dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
347 pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n");
348 for (n = 0; n < adapter->num_tx_queues; n++) {
349 tx_ring = adapter->tx_ring[n];
350 tx_buffer_info =
351 &tx_ring->tx_buffer_info[tx_ring->next_to_clean];
352 pr_info(" %5d %5X %5X %016llX %04X %3X %016llX\n",
353 n, tx_ring->next_to_use, tx_ring->next_to_clean,
354 (u64)tx_buffer_info->dma,
355 tx_buffer_info->length,
356 tx_buffer_info->next_to_watch,
357 (u64)tx_buffer_info->time_stamp);
358 }
359
360 /* Print TX Rings */
361 if (!netif_msg_tx_done(adapter))
362 goto rx_ring_summary;
363
364 dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
365
366 /* Transmit Descriptor Formats
367 *
368 * Advanced Transmit Descriptor
369 * +--------------------------------------------------------------+
370 * 0 | Buffer Address [63:0] |
371 * +--------------------------------------------------------------+
372 * 8 | PAYLEN | PORTS | IDX | STA | DCMD |DTYP | RSV | DTALEN |
373 * +--------------------------------------------------------------+
374 * 63 46 45 40 39 36 35 32 31 24 23 20 19 0
375 */
376
377 for (n = 0; n < adapter->num_tx_queues; n++) {
378 tx_ring = adapter->tx_ring[n];
379 pr_info("------------------------------------\n");
380 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index);
381 pr_info("------------------------------------\n");
382 pr_info("T [desc] [address 63:0 ] "
383 "[PlPOIdStDDt Ln] [bi->dma ] "
384 "leng ntw timestamp bi->skb\n");
385
386 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
387 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
388 tx_buffer_info = &tx_ring->tx_buffer_info[i];
389 u0 = (struct my_u0 *)tx_desc;
390 pr_info("T [0x%03X] %016llX %016llX %016llX"
391 " %04X %3X %016llX %p", i,
392 le64_to_cpu(u0->a),
393 le64_to_cpu(u0->b),
394 (u64)tx_buffer_info->dma,
395 tx_buffer_info->length,
396 tx_buffer_info->next_to_watch,
397 (u64)tx_buffer_info->time_stamp,
398 tx_buffer_info->skb);
399 if (i == tx_ring->next_to_use &&
400 i == tx_ring->next_to_clean)
401 pr_cont(" NTC/U\n");
402 else if (i == tx_ring->next_to_use)
403 pr_cont(" NTU\n");
404 else if (i == tx_ring->next_to_clean)
405 pr_cont(" NTC\n");
406 else
407 pr_cont("\n");
408
409 if (netif_msg_pktdata(adapter) &&
410 tx_buffer_info->dma != 0)
411 print_hex_dump(KERN_INFO, "",
412 DUMP_PREFIX_ADDRESS, 16, 1,
413 phys_to_virt(tx_buffer_info->dma),
414 tx_buffer_info->length, true);
415 }
416 }
417
418 /* Print RX Rings Summary */
419 rx_ring_summary:
420 dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
421 pr_info("Queue [NTU] [NTC]\n");
422 for (n = 0; n < adapter->num_rx_queues; n++) {
423 rx_ring = adapter->rx_ring[n];
424 pr_info("%5d %5X %5X\n",
425 n, rx_ring->next_to_use, rx_ring->next_to_clean);
426 }
427
428 /* Print RX Rings */
429 if (!netif_msg_rx_status(adapter))
430 goto exit;
431
432 dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
433
434 /* Advanced Receive Descriptor (Read) Format
435 * 63 1 0
436 * +-----------------------------------------------------+
437 * 0 | Packet Buffer Address [63:1] |A0/NSE|
438 * +----------------------------------------------+------+
439 * 8 | Header Buffer Address [63:1] | DD |
440 * +-----------------------------------------------------+
441 *
442 *
443 * Advanced Receive Descriptor (Write-Back) Format
444 *
445 * 63 48 47 32 31 30 21 20 16 15 4 3 0
446 * +------------------------------------------------------+
447 * 0 | Packet IP |SPH| HDR_LEN | RSV|Packet| RSS |
448 * | Checksum Ident | | | | Type | Type |
449 * +------------------------------------------------------+
450 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
451 * +------------------------------------------------------+
452 * 63 48 47 32 31 20 19 0
453 */
454 for (n = 0; n < adapter->num_rx_queues; n++) {
455 rx_ring = adapter->rx_ring[n];
456 pr_info("------------------------------------\n");
457 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index);
458 pr_info("------------------------------------\n");
459 pr_info("R [desc] [ PktBuf A0] "
460 "[ HeadBuf DD] [bi->dma ] [bi->skb] "
461 "<-- Adv Rx Read format\n");
462 pr_info("RWB[desc] [PcsmIpSHl PtRs] "
463 "[vl er S cks ln] ---------------- [bi->skb] "
464 "<-- Adv Rx Write-Back format\n");
465
466 for (i = 0; i < rx_ring->count; i++) {
467 rx_buffer_info = &rx_ring->rx_buffer_info[i];
468 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
469 u0 = (struct my_u0 *)rx_desc;
470 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
471 if (staterr & IXGBE_RXD_STAT_DD) {
472 /* Descriptor Done */
473 pr_info("RWB[0x%03X] %016llX "
474 "%016llX ---------------- %p", i,
475 le64_to_cpu(u0->a),
476 le64_to_cpu(u0->b),
477 rx_buffer_info->skb);
478 } else {
479 pr_info("R [0x%03X] %016llX "
480 "%016llX %016llX %p", i,
481 le64_to_cpu(u0->a),
482 le64_to_cpu(u0->b),
483 (u64)rx_buffer_info->dma,
484 rx_buffer_info->skb);
485
486 if (netif_msg_pktdata(adapter)) {
487 print_hex_dump(KERN_INFO, "",
488 DUMP_PREFIX_ADDRESS, 16, 1,
489 phys_to_virt(rx_buffer_info->dma),
490 rx_ring->rx_buf_len, true);
491
492 if (rx_ring->rx_buf_len
493 < IXGBE_RXBUFFER_2048)
494 print_hex_dump(KERN_INFO, "",
495 DUMP_PREFIX_ADDRESS, 16, 1,
496 phys_to_virt(
497 rx_buffer_info->page_dma +
498 rx_buffer_info->page_offset
499 ),
500 PAGE_SIZE/2, true);
501 }
502 }
503
504 if (i == rx_ring->next_to_use)
505 pr_cont(" NTU\n");
506 else if (i == rx_ring->next_to_clean)
507 pr_cont(" NTC\n");
508 else
509 pr_cont("\n");
510
511 }
512 }
513
514 exit:
515 return;
516 }
517
518 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
519 {
520 u32 ctrl_ext;
521
522 /* Let firmware take over control of h/w */
523 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
524 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
525 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
526 }
527
528 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
529 {
530 u32 ctrl_ext;
531
532 /* Let firmware know the driver has taken over */
533 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
534 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
535 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
536 }
537
538 /*
539 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
540 * @adapter: pointer to adapter struct
541 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
542 * @queue: queue to map the corresponding interrupt to
543 * @msix_vector: the vector to map to the corresponding queue
544 *
545 */
546 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
547 u8 queue, u8 msix_vector)
548 {
549 u32 ivar, index;
550 struct ixgbe_hw *hw = &adapter->hw;
551 switch (hw->mac.type) {
552 case ixgbe_mac_82598EB:
553 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
554 if (direction == -1)
555 direction = 0;
556 index = (((direction * 64) + queue) >> 2) & 0x1F;
557 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
558 ivar &= ~(0xFF << (8 * (queue & 0x3)));
559 ivar |= (msix_vector << (8 * (queue & 0x3)));
560 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
561 break;
562 case ixgbe_mac_82599EB:
563 if (direction == -1) {
564 /* other causes */
565 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
566 index = ((queue & 1) * 8);
567 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
568 ivar &= ~(0xFF << index);
569 ivar |= (msix_vector << index);
570 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
571 break;
572 } else {
573 /* tx or rx causes */
574 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
575 index = ((16 * (queue & 1)) + (8 * direction));
576 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
577 ivar &= ~(0xFF << index);
578 ivar |= (msix_vector << index);
579 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
580 break;
581 }
582 default:
583 break;
584 }
585 }
586
587 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
588 u64 qmask)
589 {
590 u32 mask;
591
592 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
593 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
594 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
595 } else {
596 mask = (qmask & 0xFFFFFFFF);
597 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
598 mask = (qmask >> 32);
599 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
600 }
601 }
602
603 void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *tx_ring,
604 struct ixgbe_tx_buffer *tx_buffer_info)
605 {
606 if (tx_buffer_info->dma) {
607 if (tx_buffer_info->mapped_as_page)
608 dma_unmap_page(tx_ring->dev,
609 tx_buffer_info->dma,
610 tx_buffer_info->length,
611 DMA_TO_DEVICE);
612 else
613 dma_unmap_single(tx_ring->dev,
614 tx_buffer_info->dma,
615 tx_buffer_info->length,
616 DMA_TO_DEVICE);
617 tx_buffer_info->dma = 0;
618 }
619 if (tx_buffer_info->skb) {
620 dev_kfree_skb_any(tx_buffer_info->skb);
621 tx_buffer_info->skb = NULL;
622 }
623 tx_buffer_info->time_stamp = 0;
624 /* tx_buffer_info must be completely set up in the transmit path */
625 }
626
627 /**
628 * ixgbe_tx_xon_state - check the tx ring xon state
629 * @adapter: the ixgbe adapter
630 * @tx_ring: the corresponding tx_ring
631 *
632 * If not in DCB mode, checks TFCS.TXOFF, otherwise, find out the
633 * corresponding TC of this tx_ring when checking TFCS.
634 *
635 * Returns : true if in xon state (currently not paused)
636 */
637 static inline bool ixgbe_tx_xon_state(struct ixgbe_adapter *adapter,
638 struct ixgbe_ring *tx_ring)
639 {
640 u32 txoff = IXGBE_TFCS_TXOFF;
641
642 #ifdef CONFIG_IXGBE_DCB
643 if (adapter->dcb_cfg.pfc_mode_enable) {
644 int tc;
645 int reg_idx = tx_ring->reg_idx;
646 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
647
648 switch (adapter->hw.mac.type) {
649 case ixgbe_mac_82598EB:
650 tc = reg_idx >> 2;
651 txoff = IXGBE_TFCS_TXOFF0;
652 break;
653 case ixgbe_mac_82599EB:
654 tc = 0;
655 txoff = IXGBE_TFCS_TXOFF;
656 if (dcb_i == 8) {
657 /* TC0, TC1 */
658 tc = reg_idx >> 5;
659 if (tc == 2) /* TC2, TC3 */
660 tc += (reg_idx - 64) >> 4;
661 else if (tc == 3) /* TC4, TC5, TC6, TC7 */
662 tc += 1 + ((reg_idx - 96) >> 3);
663 } else if (dcb_i == 4) {
664 /* TC0, TC1 */
665 tc = reg_idx >> 6;
666 if (tc == 1) {
667 tc += (reg_idx - 64) >> 5;
668 if (tc == 2) /* TC2, TC3 */
669 tc += (reg_idx - 96) >> 4;
670 }
671 }
672 break;
673 default:
674 tc = 0;
675 }
676 txoff <<= tc;
677 }
678 #endif
679 return IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & txoff;
680 }
681
682 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
683 struct ixgbe_ring *tx_ring,
684 unsigned int eop)
685 {
686 struct ixgbe_hw *hw = &adapter->hw;
687
688 /* Detect a transmit hang in hardware, this serializes the
689 * check with the clearing of time_stamp and movement of eop */
690 adapter->detect_tx_hung = false;
691 if (tx_ring->tx_buffer_info[eop].time_stamp &&
692 time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
693 ixgbe_tx_xon_state(adapter, tx_ring)) {
694 /* detected Tx unit hang */
695 union ixgbe_adv_tx_desc *tx_desc;
696 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
697 e_err(drv, "Detected Tx Unit Hang\n"
698 " Tx Queue <%d>\n"
699 " TDH, TDT <%x>, <%x>\n"
700 " next_to_use <%x>\n"
701 " next_to_clean <%x>\n"
702 "tx_buffer_info[next_to_clean]\n"
703 " time_stamp <%lx>\n"
704 " jiffies <%lx>\n",
705 tx_ring->queue_index,
706 IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)),
707 IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)),
708 tx_ring->next_to_use, eop,
709 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
710 return true;
711 }
712
713 return false;
714 }
715
716 #define IXGBE_MAX_TXD_PWR 14
717 #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
718
719 /* Tx Descriptors needed, worst case */
720 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
721 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
722 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
723 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
724
725 static void ixgbe_tx_timeout(struct net_device *netdev);
726
727 /**
728 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
729 * @q_vector: structure containing interrupt and ring information
730 * @tx_ring: tx ring to clean
731 **/
732 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
733 struct ixgbe_ring *tx_ring)
734 {
735 struct ixgbe_adapter *adapter = q_vector->adapter;
736 union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
737 struct ixgbe_tx_buffer *tx_buffer_info;
738 unsigned int i, eop, count = 0;
739 unsigned int total_bytes = 0, total_packets = 0;
740
741 i = tx_ring->next_to_clean;
742 eop = tx_ring->tx_buffer_info[i].next_to_watch;
743 eop_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
744
745 while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
746 (count < tx_ring->work_limit)) {
747 bool cleaned = false;
748 rmb(); /* read buffer_info after eop_desc */
749 for ( ; !cleaned; count++) {
750 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
751 tx_buffer_info = &tx_ring->tx_buffer_info[i];
752
753 tx_desc->wb.status = 0;
754 cleaned = (i == eop);
755
756 i++;
757 if (i == tx_ring->count)
758 i = 0;
759
760 if (cleaned && tx_buffer_info->skb) {
761 total_bytes += tx_buffer_info->bytecount;
762 total_packets += tx_buffer_info->gso_segs;
763 }
764
765 ixgbe_unmap_and_free_tx_resource(tx_ring,
766 tx_buffer_info);
767 }
768
769 eop = tx_ring->tx_buffer_info[i].next_to_watch;
770 eop_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
771 }
772
773 tx_ring->next_to_clean = i;
774
775 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
776 if (unlikely(count && netif_carrier_ok(tx_ring->netdev) &&
777 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
778 /* Make sure that anybody stopping the queue after this
779 * sees the new next_to_clean.
780 */
781 smp_mb();
782 if (__netif_subqueue_stopped(tx_ring->netdev, tx_ring->queue_index) &&
783 !test_bit(__IXGBE_DOWN, &adapter->state)) {
784 netif_wake_subqueue(tx_ring->netdev, tx_ring->queue_index);
785 ++tx_ring->tx_stats.restart_queue;
786 }
787 }
788
789 if (adapter->detect_tx_hung) {
790 if (ixgbe_check_tx_hang(adapter, tx_ring, i)) {
791 /* schedule immediate reset if we believe we hung */
792 e_info(probe, "tx hang %d detected, resetting "
793 "adapter\n", adapter->tx_timeout_count + 1);
794 ixgbe_tx_timeout(adapter->netdev);
795 }
796 }
797
798 /* re-arm the interrupt */
799 if (count >= tx_ring->work_limit)
800 ixgbe_irq_rearm_queues(adapter, ((u64)1 << q_vector->v_idx));
801
802 tx_ring->total_bytes += total_bytes;
803 tx_ring->total_packets += total_packets;
804 u64_stats_update_begin(&tx_ring->syncp);
805 tx_ring->stats.packets += total_packets;
806 tx_ring->stats.bytes += total_bytes;
807 u64_stats_update_end(&tx_ring->syncp);
808 return count < tx_ring->work_limit;
809 }
810
811 #ifdef CONFIG_IXGBE_DCA
812 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
813 struct ixgbe_ring *rx_ring)
814 {
815 u32 rxctrl;
816 int cpu = get_cpu();
817 int q = rx_ring->reg_idx;
818
819 if (rx_ring->cpu != cpu) {
820 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
821 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
822 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
823 rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
824 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
825 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
826 rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
827 IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
828 }
829 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
830 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
831 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
832 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_WRO_EN |
833 IXGBE_DCA_RXCTRL_DESC_HSRO_EN);
834 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
835 rx_ring->cpu = cpu;
836 }
837 put_cpu();
838 }
839
840 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
841 struct ixgbe_ring *tx_ring)
842 {
843 u32 txctrl;
844 int cpu = get_cpu();
845 int q = tx_ring->reg_idx;
846 struct ixgbe_hw *hw = &adapter->hw;
847
848 if (tx_ring->cpu != cpu) {
849 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
850 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(q));
851 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
852 txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
853 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
854 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(q), txctrl);
855 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
856 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(q));
857 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
858 txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
859 IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
860 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
861 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(q), txctrl);
862 }
863 tx_ring->cpu = cpu;
864 }
865 put_cpu();
866 }
867
868 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
869 {
870 int i;
871
872 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
873 return;
874
875 /* always use CB2 mode, difference is masked in the CB driver */
876 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
877
878 for (i = 0; i < adapter->num_tx_queues; i++) {
879 adapter->tx_ring[i]->cpu = -1;
880 ixgbe_update_tx_dca(adapter, adapter->tx_ring[i]);
881 }
882 for (i = 0; i < adapter->num_rx_queues; i++) {
883 adapter->rx_ring[i]->cpu = -1;
884 ixgbe_update_rx_dca(adapter, adapter->rx_ring[i]);
885 }
886 }
887
888 static int __ixgbe_notify_dca(struct device *dev, void *data)
889 {
890 struct net_device *netdev = dev_get_drvdata(dev);
891 struct ixgbe_adapter *adapter = netdev_priv(netdev);
892 unsigned long event = *(unsigned long *)data;
893
894 switch (event) {
895 case DCA_PROVIDER_ADD:
896 /* if we're already enabled, don't do it again */
897 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
898 break;
899 if (dca_add_requester(dev) == 0) {
900 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
901 ixgbe_setup_dca(adapter);
902 break;
903 }
904 /* Fall Through since DCA is disabled. */
905 case DCA_PROVIDER_REMOVE:
906 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
907 dca_remove_requester(dev);
908 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
909 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
910 }
911 break;
912 }
913
914 return 0;
915 }
916
917 #endif /* CONFIG_IXGBE_DCA */
918 /**
919 * ixgbe_receive_skb - Send a completed packet up the stack
920 * @adapter: board private structure
921 * @skb: packet to send up
922 * @status: hardware indication of status of receive
923 * @rx_ring: rx descriptor ring (for a specific queue) to setup
924 * @rx_desc: rx descriptor
925 **/
926 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
927 struct sk_buff *skb, u8 status,
928 struct ixgbe_ring *ring,
929 union ixgbe_adv_rx_desc *rx_desc)
930 {
931 struct ixgbe_adapter *adapter = q_vector->adapter;
932 struct napi_struct *napi = &q_vector->napi;
933 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
934 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
935
936 if (is_vlan && (tag & VLAN_VID_MASK))
937 __vlan_hwaccel_put_tag(skb, tag);
938
939 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
940 napi_gro_receive(napi, skb);
941 else
942 netif_rx(skb);
943 }
944
945 /**
946 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
947 * @adapter: address of board private structure
948 * @status_err: hardware indication of status of receive
949 * @skb: skb currently being received and modified
950 **/
951 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
952 union ixgbe_adv_rx_desc *rx_desc,
953 struct sk_buff *skb)
954 {
955 u32 status_err = le32_to_cpu(rx_desc->wb.upper.status_error);
956
957 skb_checksum_none_assert(skb);
958
959 /* Rx csum disabled */
960 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
961 return;
962
963 /* if IP and error */
964 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
965 (status_err & IXGBE_RXDADV_ERR_IPE)) {
966 adapter->hw_csum_rx_error++;
967 return;
968 }
969
970 if (!(status_err & IXGBE_RXD_STAT_L4CS))
971 return;
972
973 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
974 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
975
976 /*
977 * 82599 errata, UDP frames with a 0 checksum can be marked as
978 * checksum errors.
979 */
980 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
981 (adapter->hw.mac.type == ixgbe_mac_82599EB))
982 return;
983
984 adapter->hw_csum_rx_error++;
985 return;
986 }
987
988 /* It must be a TCP or UDP packet with a valid checksum */
989 skb->ip_summed = CHECKSUM_UNNECESSARY;
990 }
991
992 static inline void ixgbe_release_rx_desc(struct ixgbe_ring *rx_ring, u32 val)
993 {
994 /*
995 * Force memory writes to complete before letting h/w
996 * know there are new descriptors to fetch. (Only
997 * applicable for weak-ordered memory model archs,
998 * such as IA-64).
999 */
1000 wmb();
1001 writel(val, rx_ring->tail);
1002 }
1003
1004 /**
1005 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
1006 * @rx_ring: ring to place buffers on
1007 * @cleaned_count: number of buffers to replace
1008 **/
1009 void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count)
1010 {
1011 union ixgbe_adv_rx_desc *rx_desc;
1012 struct ixgbe_rx_buffer *bi;
1013 struct sk_buff *skb;
1014 u16 i = rx_ring->next_to_use;
1015
1016 /* do nothing if no valid netdev defined */
1017 if (!rx_ring->netdev)
1018 return;
1019
1020 while (cleaned_count--) {
1021 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1022 bi = &rx_ring->rx_buffer_info[i];
1023 skb = bi->skb;
1024
1025 if (!skb) {
1026 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
1027 rx_ring->rx_buf_len);
1028 if (!skb) {
1029 rx_ring->rx_stats.alloc_rx_buff_failed++;
1030 goto no_buffers;
1031 }
1032 /* initialize queue mapping */
1033 skb_record_rx_queue(skb, rx_ring->queue_index);
1034 bi->skb = skb;
1035 }
1036
1037 if (!bi->dma) {
1038 bi->dma = dma_map_single(rx_ring->dev,
1039 skb->data,
1040 rx_ring->rx_buf_len,
1041 DMA_FROM_DEVICE);
1042 if (dma_mapping_error(rx_ring->dev, bi->dma)) {
1043 rx_ring->rx_stats.alloc_rx_buff_failed++;
1044 bi->dma = 0;
1045 goto no_buffers;
1046 }
1047 }
1048
1049 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1050 if (!bi->page) {
1051 bi->page = netdev_alloc_page(rx_ring->netdev);
1052 if (!bi->page) {
1053 rx_ring->rx_stats.alloc_rx_page_failed++;
1054 goto no_buffers;
1055 }
1056 }
1057
1058 if (!bi->page_dma) {
1059 /* use a half page if we're re-using */
1060 bi->page_offset ^= PAGE_SIZE / 2;
1061 bi->page_dma = dma_map_page(rx_ring->dev,
1062 bi->page,
1063 bi->page_offset,
1064 PAGE_SIZE / 2,
1065 DMA_FROM_DEVICE);
1066 if (dma_mapping_error(rx_ring->dev,
1067 bi->page_dma)) {
1068 rx_ring->rx_stats.alloc_rx_page_failed++;
1069 bi->page_dma = 0;
1070 goto no_buffers;
1071 }
1072 }
1073
1074 /* Refresh the desc even if buffer_addrs didn't change
1075 * because each write-back erases this info. */
1076 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
1077 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
1078 } else {
1079 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
1080 rx_desc->read.hdr_addr = 0;
1081 }
1082
1083 i++;
1084 if (i == rx_ring->count)
1085 i = 0;
1086 }
1087
1088 no_buffers:
1089 if (rx_ring->next_to_use != i) {
1090 rx_ring->next_to_use = i;
1091 ixgbe_release_rx_desc(rx_ring, i);
1092 }
1093 }
1094
1095 static inline u16 ixgbe_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
1096 {
1097 return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
1098 }
1099
1100 static inline u16 ixgbe_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
1101 {
1102 return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1103 }
1104
1105 static inline u32 ixgbe_get_rsc_count(union ixgbe_adv_rx_desc *rx_desc)
1106 {
1107 return (le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
1108 IXGBE_RXDADV_RSCCNT_MASK) >>
1109 IXGBE_RXDADV_RSCCNT_SHIFT;
1110 }
1111
1112 /**
1113 * ixgbe_transform_rsc_queue - change rsc queue into a full packet
1114 * @skb: pointer to the last skb in the rsc queue
1115 * @count: pointer to number of packets coalesced in this context
1116 *
1117 * This function changes a queue full of hw rsc buffers into a completed
1118 * packet. It uses the ->prev pointers to find the first packet and then
1119 * turns it into the frag list owner.
1120 **/
1121 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb,
1122 u64 *count)
1123 {
1124 unsigned int frag_list_size = 0;
1125
1126 while (skb->prev) {
1127 struct sk_buff *prev = skb->prev;
1128 frag_list_size += skb->len;
1129 skb->prev = NULL;
1130 skb = prev;
1131 *count += 1;
1132 }
1133
1134 skb_shinfo(skb)->frag_list = skb->next;
1135 skb->next = NULL;
1136 skb->len += frag_list_size;
1137 skb->data_len += frag_list_size;
1138 skb->truesize += frag_list_size;
1139 return skb;
1140 }
1141
1142 struct ixgbe_rsc_cb {
1143 dma_addr_t dma;
1144 bool delay_unmap;
1145 };
1146
1147 #define IXGBE_RSC_CB(skb) ((struct ixgbe_rsc_cb *)(skb)->cb)
1148
1149 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
1150 struct ixgbe_ring *rx_ring,
1151 int *work_done, int work_to_do)
1152 {
1153 struct ixgbe_adapter *adapter = q_vector->adapter;
1154 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
1155 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
1156 struct sk_buff *skb;
1157 unsigned int i, rsc_count = 0;
1158 u32 len, staterr;
1159 u16 hdr_info;
1160 bool cleaned = false;
1161 int cleaned_count = 0;
1162 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1163 #ifdef IXGBE_FCOE
1164 int ddp_bytes = 0;
1165 #endif /* IXGBE_FCOE */
1166
1167 i = rx_ring->next_to_clean;
1168 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1169 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1170 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1171
1172 while (staterr & IXGBE_RXD_STAT_DD) {
1173 u32 upper_len = 0;
1174 if (*work_done >= work_to_do)
1175 break;
1176 (*work_done)++;
1177
1178 rmb(); /* read descriptor and rx_buffer_info after status DD */
1179 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1180 hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
1181 len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
1182 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
1183 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
1184 if ((len > IXGBE_RX_HDR_SIZE) ||
1185 (upper_len && !(hdr_info & IXGBE_RXDADV_SPH)))
1186 len = IXGBE_RX_HDR_SIZE;
1187 } else {
1188 len = le16_to_cpu(rx_desc->wb.upper.length);
1189 }
1190
1191 cleaned = true;
1192 skb = rx_buffer_info->skb;
1193 prefetch(skb->data);
1194 rx_buffer_info->skb = NULL;
1195
1196 if (rx_buffer_info->dma) {
1197 if ((adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
1198 (!(staterr & IXGBE_RXD_STAT_EOP)) &&
1199 (!(skb->prev))) {
1200 /*
1201 * When HWRSC is enabled, delay unmapping
1202 * of the first packet. It carries the
1203 * header information, HW may still
1204 * access the header after the writeback.
1205 * Only unmap it when EOP is reached
1206 */
1207 IXGBE_RSC_CB(skb)->delay_unmap = true;
1208 IXGBE_RSC_CB(skb)->dma = rx_buffer_info->dma;
1209 } else {
1210 dma_unmap_single(rx_ring->dev,
1211 rx_buffer_info->dma,
1212 rx_ring->rx_buf_len,
1213 DMA_FROM_DEVICE);
1214 }
1215 rx_buffer_info->dma = 0;
1216 skb_put(skb, len);
1217 }
1218
1219 if (upper_len) {
1220 dma_unmap_page(rx_ring->dev,
1221 rx_buffer_info->page_dma,
1222 PAGE_SIZE / 2,
1223 DMA_FROM_DEVICE);
1224 rx_buffer_info->page_dma = 0;
1225 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
1226 rx_buffer_info->page,
1227 rx_buffer_info->page_offset,
1228 upper_len);
1229
1230 if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
1231 (page_count(rx_buffer_info->page) != 1))
1232 rx_buffer_info->page = NULL;
1233 else
1234 get_page(rx_buffer_info->page);
1235
1236 skb->len += upper_len;
1237 skb->data_len += upper_len;
1238 skb->truesize += upper_len;
1239 }
1240
1241 i++;
1242 if (i == rx_ring->count)
1243 i = 0;
1244
1245 next_rxd = IXGBE_RX_DESC_ADV(rx_ring, i);
1246 prefetch(next_rxd);
1247 cleaned_count++;
1248
1249 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
1250 rsc_count = ixgbe_get_rsc_count(rx_desc);
1251
1252 if (rsc_count) {
1253 u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
1254 IXGBE_RXDADV_NEXTP_SHIFT;
1255 next_buffer = &rx_ring->rx_buffer_info[nextp];
1256 } else {
1257 next_buffer = &rx_ring->rx_buffer_info[i];
1258 }
1259
1260 if (staterr & IXGBE_RXD_STAT_EOP) {
1261 if (skb->prev)
1262 skb = ixgbe_transform_rsc_queue(skb,
1263 &(rx_ring->rx_stats.rsc_count));
1264 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
1265 if (IXGBE_RSC_CB(skb)->delay_unmap) {
1266 dma_unmap_single(rx_ring->dev,
1267 IXGBE_RSC_CB(skb)->dma,
1268 rx_ring->rx_buf_len,
1269 DMA_FROM_DEVICE);
1270 IXGBE_RSC_CB(skb)->dma = 0;
1271 IXGBE_RSC_CB(skb)->delay_unmap = false;
1272 }
1273 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)
1274 rx_ring->rx_stats.rsc_count +=
1275 skb_shinfo(skb)->nr_frags;
1276 else
1277 rx_ring->rx_stats.rsc_count++;
1278 rx_ring->rx_stats.rsc_flush++;
1279 }
1280 u64_stats_update_begin(&rx_ring->syncp);
1281 rx_ring->stats.packets++;
1282 rx_ring->stats.bytes += skb->len;
1283 u64_stats_update_end(&rx_ring->syncp);
1284 } else {
1285 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1286 rx_buffer_info->skb = next_buffer->skb;
1287 rx_buffer_info->dma = next_buffer->dma;
1288 next_buffer->skb = skb;
1289 next_buffer->dma = 0;
1290 } else {
1291 skb->next = next_buffer->skb;
1292 skb->next->prev = skb;
1293 }
1294 rx_ring->rx_stats.non_eop_descs++;
1295 goto next_desc;
1296 }
1297
1298 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
1299 dev_kfree_skb_irq(skb);
1300 goto next_desc;
1301 }
1302
1303 ixgbe_rx_checksum(adapter, rx_desc, skb);
1304
1305 /* probably a little skewed due to removing CRC */
1306 total_rx_bytes += skb->len;
1307 total_rx_packets++;
1308
1309 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
1310 #ifdef IXGBE_FCOE
1311 /* if ddp, not passing to ULD unless for FCP_RSP or error */
1312 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
1313 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
1314 if (!ddp_bytes)
1315 goto next_desc;
1316 }
1317 #endif /* IXGBE_FCOE */
1318 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
1319
1320 next_desc:
1321 rx_desc->wb.upper.status_error = 0;
1322
1323 /* return some buffers to hardware, one at a time is too slow */
1324 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
1325 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1326 cleaned_count = 0;
1327 }
1328
1329 /* use prefetched values */
1330 rx_desc = next_rxd;
1331 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1332
1333 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1334 }
1335
1336 rx_ring->next_to_clean = i;
1337 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
1338
1339 if (cleaned_count)
1340 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1341
1342 #ifdef IXGBE_FCOE
1343 /* include DDPed FCoE data */
1344 if (ddp_bytes > 0) {
1345 unsigned int mss;
1346
1347 mss = rx_ring->netdev->mtu - sizeof(struct fcoe_hdr) -
1348 sizeof(struct fc_frame_header) -
1349 sizeof(struct fcoe_crc_eof);
1350 if (mss > 512)
1351 mss &= ~511;
1352 total_rx_bytes += ddp_bytes;
1353 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
1354 }
1355 #endif /* IXGBE_FCOE */
1356
1357 rx_ring->total_packets += total_rx_packets;
1358 rx_ring->total_bytes += total_rx_bytes;
1359
1360 return cleaned;
1361 }
1362
1363 static int ixgbe_clean_rxonly(struct napi_struct *, int);
1364 /**
1365 * ixgbe_configure_msix - Configure MSI-X hardware
1366 * @adapter: board private structure
1367 *
1368 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
1369 * interrupts.
1370 **/
1371 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
1372 {
1373 struct ixgbe_q_vector *q_vector;
1374 int i, j, q_vectors, v_idx, r_idx;
1375 u32 mask;
1376
1377 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1378
1379 /*
1380 * Populate the IVAR table and set the ITR values to the
1381 * corresponding register.
1382 */
1383 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1384 q_vector = adapter->q_vector[v_idx];
1385 /* XXX for_each_set_bit(...) */
1386 r_idx = find_first_bit(q_vector->rxr_idx,
1387 adapter->num_rx_queues);
1388
1389 for (i = 0; i < q_vector->rxr_count; i++) {
1390 j = adapter->rx_ring[r_idx]->reg_idx;
1391 ixgbe_set_ivar(adapter, 0, j, v_idx);
1392 r_idx = find_next_bit(q_vector->rxr_idx,
1393 adapter->num_rx_queues,
1394 r_idx + 1);
1395 }
1396 r_idx = find_first_bit(q_vector->txr_idx,
1397 adapter->num_tx_queues);
1398
1399 for (i = 0; i < q_vector->txr_count; i++) {
1400 j = adapter->tx_ring[r_idx]->reg_idx;
1401 ixgbe_set_ivar(adapter, 1, j, v_idx);
1402 r_idx = find_next_bit(q_vector->txr_idx,
1403 adapter->num_tx_queues,
1404 r_idx + 1);
1405 }
1406
1407 if (q_vector->txr_count && !q_vector->rxr_count)
1408 /* tx only */
1409 q_vector->eitr = adapter->tx_eitr_param;
1410 else if (q_vector->rxr_count)
1411 /* rx or mixed */
1412 q_vector->eitr = adapter->rx_eitr_param;
1413
1414 ixgbe_write_eitr(q_vector);
1415 /* If Flow Director is enabled, set interrupt affinity */
1416 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
1417 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)) {
1418 /*
1419 * Allocate the affinity_hint cpumask, assign the mask
1420 * for this vector, and set our affinity_hint for
1421 * this irq.
1422 */
1423 if (!alloc_cpumask_var(&q_vector->affinity_mask,
1424 GFP_KERNEL))
1425 return;
1426 cpumask_set_cpu(v_idx, q_vector->affinity_mask);
1427 irq_set_affinity_hint(adapter->msix_entries[v_idx].vector,
1428 q_vector->affinity_mask);
1429 }
1430 }
1431
1432 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
1433 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
1434 v_idx);
1435 else if (adapter->hw.mac.type == ixgbe_mac_82599EB)
1436 ixgbe_set_ivar(adapter, -1, 1, v_idx);
1437 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
1438
1439 /* set up to autoclear timer, and the vectors */
1440 mask = IXGBE_EIMS_ENABLE_MASK;
1441 if (adapter->num_vfs)
1442 mask &= ~(IXGBE_EIMS_OTHER |
1443 IXGBE_EIMS_MAILBOX |
1444 IXGBE_EIMS_LSC);
1445 else
1446 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
1447 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
1448 }
1449
1450 enum latency_range {
1451 lowest_latency = 0,
1452 low_latency = 1,
1453 bulk_latency = 2,
1454 latency_invalid = 255
1455 };
1456
1457 /**
1458 * ixgbe_update_itr - update the dynamic ITR value based on statistics
1459 * @adapter: pointer to adapter
1460 * @eitr: eitr setting (ints per sec) to give last timeslice
1461 * @itr_setting: current throttle rate in ints/second
1462 * @packets: the number of packets during this measurement interval
1463 * @bytes: the number of bytes during this measurement interval
1464 *
1465 * Stores a new ITR value based on packets and byte
1466 * counts during the last interrupt. The advantage of per interrupt
1467 * computation is faster updates and more accurate ITR for the current
1468 * traffic pattern. Constants in this function were computed
1469 * based on theoretical maximum wire speed and thresholds were set based
1470 * on testing data as well as attempting to minimize response time
1471 * while increasing bulk throughput.
1472 * this functionality is controlled by the InterruptThrottleRate module
1473 * parameter (see ixgbe_param.c)
1474 **/
1475 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
1476 u32 eitr, u8 itr_setting,
1477 int packets, int bytes)
1478 {
1479 unsigned int retval = itr_setting;
1480 u32 timepassed_us;
1481 u64 bytes_perint;
1482
1483 if (packets == 0)
1484 goto update_itr_done;
1485
1486
1487 /* simple throttlerate management
1488 * 0-20MB/s lowest (100000 ints/s)
1489 * 20-100MB/s low (20000 ints/s)
1490 * 100-1249MB/s bulk (8000 ints/s)
1491 */
1492 /* what was last interrupt timeslice? */
1493 timepassed_us = 1000000/eitr;
1494 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1495
1496 switch (itr_setting) {
1497 case lowest_latency:
1498 if (bytes_perint > adapter->eitr_low)
1499 retval = low_latency;
1500 break;
1501 case low_latency:
1502 if (bytes_perint > adapter->eitr_high)
1503 retval = bulk_latency;
1504 else if (bytes_perint <= adapter->eitr_low)
1505 retval = lowest_latency;
1506 break;
1507 case bulk_latency:
1508 if (bytes_perint <= adapter->eitr_high)
1509 retval = low_latency;
1510 break;
1511 }
1512
1513 update_itr_done:
1514 return retval;
1515 }
1516
1517 /**
1518 * ixgbe_write_eitr - write EITR register in hardware specific way
1519 * @q_vector: structure containing interrupt and ring information
1520 *
1521 * This function is made to be called by ethtool and by the driver
1522 * when it needs to update EITR registers at runtime. Hardware
1523 * specific quirks/differences are taken care of here.
1524 */
1525 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1526 {
1527 struct ixgbe_adapter *adapter = q_vector->adapter;
1528 struct ixgbe_hw *hw = &adapter->hw;
1529 int v_idx = q_vector->v_idx;
1530 u32 itr_reg = EITR_INTS_PER_SEC_TO_REG(q_vector->eitr);
1531
1532 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1533 /* must write high and low 16 bits to reset counter */
1534 itr_reg |= (itr_reg << 16);
1535 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1536 /*
1537 * 82599 can support a value of zero, so allow it for
1538 * max interrupt rate, but there is an errata where it can
1539 * not be zero with RSC
1540 */
1541 if (itr_reg == 8 &&
1542 !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
1543 itr_reg = 0;
1544
1545 /*
1546 * set the WDIS bit to not clear the timer bits and cause an
1547 * immediate assertion of the interrupt
1548 */
1549 itr_reg |= IXGBE_EITR_CNT_WDIS;
1550 }
1551 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1552 }
1553
1554 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
1555 {
1556 struct ixgbe_adapter *adapter = q_vector->adapter;
1557 u32 new_itr;
1558 u8 current_itr, ret_itr;
1559 int i, r_idx;
1560 struct ixgbe_ring *rx_ring, *tx_ring;
1561
1562 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1563 for (i = 0; i < q_vector->txr_count; i++) {
1564 tx_ring = adapter->tx_ring[r_idx];
1565 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1566 q_vector->tx_itr,
1567 tx_ring->total_packets,
1568 tx_ring->total_bytes);
1569 /* if the result for this queue would decrease interrupt
1570 * rate for this vector then use that result */
1571 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
1572 q_vector->tx_itr - 1 : ret_itr);
1573 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1574 r_idx + 1);
1575 }
1576
1577 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1578 for (i = 0; i < q_vector->rxr_count; i++) {
1579 rx_ring = adapter->rx_ring[r_idx];
1580 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1581 q_vector->rx_itr,
1582 rx_ring->total_packets,
1583 rx_ring->total_bytes);
1584 /* if the result for this queue would decrease interrupt
1585 * rate for this vector then use that result */
1586 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
1587 q_vector->rx_itr - 1 : ret_itr);
1588 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1589 r_idx + 1);
1590 }
1591
1592 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1593
1594 switch (current_itr) {
1595 /* counts and packets in update_itr are dependent on these numbers */
1596 case lowest_latency:
1597 new_itr = 100000;
1598 break;
1599 case low_latency:
1600 new_itr = 20000; /* aka hwitr = ~200 */
1601 break;
1602 case bulk_latency:
1603 default:
1604 new_itr = 8000;
1605 break;
1606 }
1607
1608 if (new_itr != q_vector->eitr) {
1609 /* do an exponential smoothing */
1610 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1611
1612 /* save the algorithm value here, not the smoothed one */
1613 q_vector->eitr = new_itr;
1614
1615 ixgbe_write_eitr(q_vector);
1616 }
1617 }
1618
1619 /**
1620 * ixgbe_check_overtemp_task - worker thread to check over tempurature
1621 * @work: pointer to work_struct containing our data
1622 **/
1623 static void ixgbe_check_overtemp_task(struct work_struct *work)
1624 {
1625 struct ixgbe_adapter *adapter = container_of(work,
1626 struct ixgbe_adapter,
1627 check_overtemp_task);
1628 struct ixgbe_hw *hw = &adapter->hw;
1629 u32 eicr = adapter->interrupt_event;
1630
1631 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE))
1632 return;
1633
1634 switch (hw->device_id) {
1635 case IXGBE_DEV_ID_82599_T3_LOM: {
1636 u32 autoneg;
1637 bool link_up = false;
1638
1639 if (hw->mac.ops.check_link)
1640 hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
1641
1642 if (((eicr & IXGBE_EICR_GPI_SDP0) && (!link_up)) ||
1643 (eicr & IXGBE_EICR_LSC))
1644 /* Check if this is due to overtemp */
1645 if (hw->phy.ops.check_overtemp(hw) == IXGBE_ERR_OVERTEMP)
1646 break;
1647 return;
1648 }
1649 default:
1650 if (!(eicr & IXGBE_EICR_GPI_SDP0))
1651 return;
1652 break;
1653 }
1654 e_crit(drv,
1655 "Network adapter has been stopped because it has over heated. "
1656 "Restart the computer. If the problem persists, "
1657 "power off the system and replace the adapter\n");
1658 /* write to clear the interrupt */
1659 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP0);
1660 }
1661
1662 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1663 {
1664 struct ixgbe_hw *hw = &adapter->hw;
1665
1666 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1667 (eicr & IXGBE_EICR_GPI_SDP1)) {
1668 e_crit(probe, "Fan has stopped, replace the adapter\n");
1669 /* write to clear the interrupt */
1670 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1671 }
1672 }
1673
1674 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1675 {
1676 struct ixgbe_hw *hw = &adapter->hw;
1677
1678 if (eicr & IXGBE_EICR_GPI_SDP1) {
1679 /* Clear the interrupt */
1680 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1681 schedule_work(&adapter->multispeed_fiber_task);
1682 } else if (eicr & IXGBE_EICR_GPI_SDP2) {
1683 /* Clear the interrupt */
1684 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1685 schedule_work(&adapter->sfp_config_module_task);
1686 } else {
1687 /* Interrupt isn't for us... */
1688 return;
1689 }
1690 }
1691
1692 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1693 {
1694 struct ixgbe_hw *hw = &adapter->hw;
1695
1696 adapter->lsc_int++;
1697 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1698 adapter->link_check_timeout = jiffies;
1699 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1700 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1701 IXGBE_WRITE_FLUSH(hw);
1702 schedule_work(&adapter->watchdog_task);
1703 }
1704 }
1705
1706 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1707 {
1708 struct net_device *netdev = data;
1709 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1710 struct ixgbe_hw *hw = &adapter->hw;
1711 u32 eicr;
1712
1713 /*
1714 * Workaround for Silicon errata. Use clear-by-write instead
1715 * of clear-by-read. Reading with EICS will return the
1716 * interrupt causes without clearing, which later be done
1717 * with the write to EICR.
1718 */
1719 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1720 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1721
1722 if (eicr & IXGBE_EICR_LSC)
1723 ixgbe_check_lsc(adapter);
1724
1725 if (eicr & IXGBE_EICR_MAILBOX)
1726 ixgbe_msg_task(adapter);
1727
1728 if (hw->mac.type == ixgbe_mac_82598EB)
1729 ixgbe_check_fan_failure(adapter, eicr);
1730
1731 if (hw->mac.type == ixgbe_mac_82599EB) {
1732 ixgbe_check_sfp_event(adapter, eicr);
1733 adapter->interrupt_event = eicr;
1734 if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
1735 ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)))
1736 schedule_work(&adapter->check_overtemp_task);
1737
1738 /* Handle Flow Director Full threshold interrupt */
1739 if (eicr & IXGBE_EICR_FLOW_DIR) {
1740 int i;
1741 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_FLOW_DIR);
1742 /* Disable transmits before FDIR Re-initialization */
1743 netif_tx_stop_all_queues(netdev);
1744 for (i = 0; i < adapter->num_tx_queues; i++) {
1745 struct ixgbe_ring *tx_ring =
1746 adapter->tx_ring[i];
1747 if (test_and_clear_bit(__IXGBE_FDIR_INIT_DONE,
1748 &tx_ring->reinit_state))
1749 schedule_work(&adapter->fdir_reinit_task);
1750 }
1751 }
1752 }
1753 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1754 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
1755
1756 return IRQ_HANDLED;
1757 }
1758
1759 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1760 u64 qmask)
1761 {
1762 u32 mask;
1763
1764 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1765 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1766 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1767 } else {
1768 mask = (qmask & 0xFFFFFFFF);
1769 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(0), mask);
1770 mask = (qmask >> 32);
1771 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(1), mask);
1772 }
1773 /* skip the flush */
1774 }
1775
1776 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1777 u64 qmask)
1778 {
1779 u32 mask;
1780
1781 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1782 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1783 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, mask);
1784 } else {
1785 mask = (qmask & 0xFFFFFFFF);
1786 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), mask);
1787 mask = (qmask >> 32);
1788 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), mask);
1789 }
1790 /* skip the flush */
1791 }
1792
1793 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
1794 {
1795 struct ixgbe_q_vector *q_vector = data;
1796 struct ixgbe_adapter *adapter = q_vector->adapter;
1797 struct ixgbe_ring *tx_ring;
1798 int i, r_idx;
1799
1800 if (!q_vector->txr_count)
1801 return IRQ_HANDLED;
1802
1803 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1804 for (i = 0; i < q_vector->txr_count; i++) {
1805 tx_ring = adapter->tx_ring[r_idx];
1806 tx_ring->total_bytes = 0;
1807 tx_ring->total_packets = 0;
1808 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1809 r_idx + 1);
1810 }
1811
1812 /* EIAM disabled interrupts (on this vector) for us */
1813 napi_schedule(&q_vector->napi);
1814
1815 return IRQ_HANDLED;
1816 }
1817
1818 /**
1819 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
1820 * @irq: unused
1821 * @data: pointer to our q_vector struct for this interrupt vector
1822 **/
1823 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
1824 {
1825 struct ixgbe_q_vector *q_vector = data;
1826 struct ixgbe_adapter *adapter = q_vector->adapter;
1827 struct ixgbe_ring *rx_ring;
1828 int r_idx;
1829 int i;
1830
1831 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1832 for (i = 0; i < q_vector->rxr_count; i++) {
1833 rx_ring = adapter->rx_ring[r_idx];
1834 rx_ring->total_bytes = 0;
1835 rx_ring->total_packets = 0;
1836 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1837 r_idx + 1);
1838 }
1839
1840 if (!q_vector->rxr_count)
1841 return IRQ_HANDLED;
1842
1843 /* disable interrupts on this vector only */
1844 /* EIAM disabled interrupts (on this vector) for us */
1845 napi_schedule(&q_vector->napi);
1846
1847 return IRQ_HANDLED;
1848 }
1849
1850 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1851 {
1852 struct ixgbe_q_vector *q_vector = data;
1853 struct ixgbe_adapter *adapter = q_vector->adapter;
1854 struct ixgbe_ring *ring;
1855 int r_idx;
1856 int i;
1857
1858 if (!q_vector->txr_count && !q_vector->rxr_count)
1859 return IRQ_HANDLED;
1860
1861 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1862 for (i = 0; i < q_vector->txr_count; i++) {
1863 ring = adapter->tx_ring[r_idx];
1864 ring->total_bytes = 0;
1865 ring->total_packets = 0;
1866 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1867 r_idx + 1);
1868 }
1869
1870 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1871 for (i = 0; i < q_vector->rxr_count; i++) {
1872 ring = adapter->rx_ring[r_idx];
1873 ring->total_bytes = 0;
1874 ring->total_packets = 0;
1875 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1876 r_idx + 1);
1877 }
1878
1879 /* EIAM disabled interrupts (on this vector) for us */
1880 napi_schedule(&q_vector->napi);
1881
1882 return IRQ_HANDLED;
1883 }
1884
1885 /**
1886 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1887 * @napi: napi struct with our devices info in it
1888 * @budget: amount of work driver is allowed to do this pass, in packets
1889 *
1890 * This function is optimized for cleaning one queue only on a single
1891 * q_vector!!!
1892 **/
1893 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1894 {
1895 struct ixgbe_q_vector *q_vector =
1896 container_of(napi, struct ixgbe_q_vector, napi);
1897 struct ixgbe_adapter *adapter = q_vector->adapter;
1898 struct ixgbe_ring *rx_ring = NULL;
1899 int work_done = 0;
1900 long r_idx;
1901
1902 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1903 rx_ring = adapter->rx_ring[r_idx];
1904 #ifdef CONFIG_IXGBE_DCA
1905 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1906 ixgbe_update_rx_dca(adapter, rx_ring);
1907 #endif
1908
1909 ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
1910
1911 /* If all Rx work done, exit the polling mode */
1912 if (work_done < budget) {
1913 napi_complete(napi);
1914 if (adapter->rx_itr_setting & 1)
1915 ixgbe_set_itr_msix(q_vector);
1916 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1917 ixgbe_irq_enable_queues(adapter,
1918 ((u64)1 << q_vector->v_idx));
1919 }
1920
1921 return work_done;
1922 }
1923
1924 /**
1925 * ixgbe_clean_rxtx_many - msix (aka one shot) rx clean routine
1926 * @napi: napi struct with our devices info in it
1927 * @budget: amount of work driver is allowed to do this pass, in packets
1928 *
1929 * This function will clean more than one rx queue associated with a
1930 * q_vector.
1931 **/
1932 static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
1933 {
1934 struct ixgbe_q_vector *q_vector =
1935 container_of(napi, struct ixgbe_q_vector, napi);
1936 struct ixgbe_adapter *adapter = q_vector->adapter;
1937 struct ixgbe_ring *ring = NULL;
1938 int work_done = 0, i;
1939 long r_idx;
1940 bool tx_clean_complete = true;
1941
1942 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1943 for (i = 0; i < q_vector->txr_count; i++) {
1944 ring = adapter->tx_ring[r_idx];
1945 #ifdef CONFIG_IXGBE_DCA
1946 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1947 ixgbe_update_tx_dca(adapter, ring);
1948 #endif
1949 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
1950 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1951 r_idx + 1);
1952 }
1953
1954 /* attempt to distribute budget to each queue fairly, but don't allow
1955 * the budget to go below 1 because we'll exit polling */
1956 budget /= (q_vector->rxr_count ?: 1);
1957 budget = max(budget, 1);
1958 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1959 for (i = 0; i < q_vector->rxr_count; i++) {
1960 ring = adapter->rx_ring[r_idx];
1961 #ifdef CONFIG_IXGBE_DCA
1962 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1963 ixgbe_update_rx_dca(adapter, ring);
1964 #endif
1965 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
1966 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1967 r_idx + 1);
1968 }
1969
1970 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1971 ring = adapter->rx_ring[r_idx];
1972 /* If all Rx work done, exit the polling mode */
1973 if (work_done < budget) {
1974 napi_complete(napi);
1975 if (adapter->rx_itr_setting & 1)
1976 ixgbe_set_itr_msix(q_vector);
1977 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1978 ixgbe_irq_enable_queues(adapter,
1979 ((u64)1 << q_vector->v_idx));
1980 return 0;
1981 }
1982
1983 return work_done;
1984 }
1985
1986 /**
1987 * ixgbe_clean_txonly - msix (aka one shot) tx clean routine
1988 * @napi: napi struct with our devices info in it
1989 * @budget: amount of work driver is allowed to do this pass, in packets
1990 *
1991 * This function is optimized for cleaning one queue only on a single
1992 * q_vector!!!
1993 **/
1994 static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
1995 {
1996 struct ixgbe_q_vector *q_vector =
1997 container_of(napi, struct ixgbe_q_vector, napi);
1998 struct ixgbe_adapter *adapter = q_vector->adapter;
1999 struct ixgbe_ring *tx_ring = NULL;
2000 int work_done = 0;
2001 long r_idx;
2002
2003 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
2004 tx_ring = adapter->tx_ring[r_idx];
2005 #ifdef CONFIG_IXGBE_DCA
2006 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2007 ixgbe_update_tx_dca(adapter, tx_ring);
2008 #endif
2009
2010 if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
2011 work_done = budget;
2012
2013 /* If all Tx work done, exit the polling mode */
2014 if (work_done < budget) {
2015 napi_complete(napi);
2016 if (adapter->tx_itr_setting & 1)
2017 ixgbe_set_itr_msix(q_vector);
2018 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2019 ixgbe_irq_enable_queues(adapter,
2020 ((u64)1 << q_vector->v_idx));
2021 }
2022
2023 return work_done;
2024 }
2025
2026 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
2027 int r_idx)
2028 {
2029 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2030
2031 set_bit(r_idx, q_vector->rxr_idx);
2032 q_vector->rxr_count++;
2033 }
2034
2035 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
2036 int t_idx)
2037 {
2038 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2039
2040 set_bit(t_idx, q_vector->txr_idx);
2041 q_vector->txr_count++;
2042 }
2043
2044 /**
2045 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
2046 * @adapter: board private structure to initialize
2047 * @vectors: allotted vector count for descriptor rings
2048 *
2049 * This function maps descriptor rings to the queue-specific vectors
2050 * we were allotted through the MSI-X enabling code. Ideally, we'd have
2051 * one vector per ring/queue, but on a constrained vector budget, we
2052 * group the rings as "efficiently" as possible. You would add new
2053 * mapping configurations in here.
2054 **/
2055 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
2056 int vectors)
2057 {
2058 int v_start = 0;
2059 int rxr_idx = 0, txr_idx = 0;
2060 int rxr_remaining = adapter->num_rx_queues;
2061 int txr_remaining = adapter->num_tx_queues;
2062 int i, j;
2063 int rqpv, tqpv;
2064 int err = 0;
2065
2066 /* No mapping required if MSI-X is disabled. */
2067 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2068 goto out;
2069
2070 /*
2071 * The ideal configuration...
2072 * We have enough vectors to map one per queue.
2073 */
2074 if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
2075 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
2076 map_vector_to_rxq(adapter, v_start, rxr_idx);
2077
2078 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
2079 map_vector_to_txq(adapter, v_start, txr_idx);
2080
2081 goto out;
2082 }
2083
2084 /*
2085 * If we don't have enough vectors for a 1-to-1
2086 * mapping, we'll have to group them so there are
2087 * multiple queues per vector.
2088 */
2089 /* Re-adjusting *qpv takes care of the remainder. */
2090 for (i = v_start; i < vectors; i++) {
2091 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
2092 for (j = 0; j < rqpv; j++) {
2093 map_vector_to_rxq(adapter, i, rxr_idx);
2094 rxr_idx++;
2095 rxr_remaining--;
2096 }
2097 }
2098 for (i = v_start; i < vectors; i++) {
2099 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
2100 for (j = 0; j < tqpv; j++) {
2101 map_vector_to_txq(adapter, i, txr_idx);
2102 txr_idx++;
2103 txr_remaining--;
2104 }
2105 }
2106
2107 out:
2108 return err;
2109 }
2110
2111 /**
2112 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2113 * @adapter: board private structure
2114 *
2115 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2116 * interrupts from the kernel.
2117 **/
2118 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2119 {
2120 struct net_device *netdev = adapter->netdev;
2121 irqreturn_t (*handler)(int, void *);
2122 int i, vector, q_vectors, err;
2123 int ri = 0, ti = 0;
2124
2125 /* Decrement for Other and TCP Timer vectors */
2126 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2127
2128 /* Map the Tx/Rx rings to the vectors we were allotted. */
2129 err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
2130 if (err)
2131 goto out;
2132
2133 #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
2134 (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
2135 &ixgbe_msix_clean_many)
2136 for (vector = 0; vector < q_vectors; vector++) {
2137 handler = SET_HANDLER(adapter->q_vector[vector]);
2138
2139 if (handler == &ixgbe_msix_clean_rx) {
2140 sprintf(adapter->name[vector], "%s-%s-%d",
2141 netdev->name, "rx", ri++);
2142 } else if (handler == &ixgbe_msix_clean_tx) {
2143 sprintf(adapter->name[vector], "%s-%s-%d",
2144 netdev->name, "tx", ti++);
2145 } else
2146 sprintf(adapter->name[vector], "%s-%s-%d",
2147 netdev->name, "TxRx", vector);
2148
2149 err = request_irq(adapter->msix_entries[vector].vector,
2150 handler, 0, adapter->name[vector],
2151 adapter->q_vector[vector]);
2152 if (err) {
2153 e_err(probe, "request_irq failed for MSIX interrupt "
2154 "Error: %d\n", err);
2155 goto free_queue_irqs;
2156 }
2157 }
2158
2159 sprintf(adapter->name[vector], "%s:lsc", netdev->name);
2160 err = request_irq(adapter->msix_entries[vector].vector,
2161 ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
2162 if (err) {
2163 e_err(probe, "request_irq for msix_lsc failed: %d\n", err);
2164 goto free_queue_irqs;
2165 }
2166
2167 return 0;
2168
2169 free_queue_irqs:
2170 for (i = vector - 1; i >= 0; i--)
2171 free_irq(adapter->msix_entries[--vector].vector,
2172 adapter->q_vector[i]);
2173 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2174 pci_disable_msix(adapter->pdev);
2175 kfree(adapter->msix_entries);
2176 adapter->msix_entries = NULL;
2177 out:
2178 return err;
2179 }
2180
2181 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
2182 {
2183 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2184 u8 current_itr;
2185 u32 new_itr = q_vector->eitr;
2186 struct ixgbe_ring *rx_ring = adapter->rx_ring[0];
2187 struct ixgbe_ring *tx_ring = adapter->tx_ring[0];
2188
2189 q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
2190 q_vector->tx_itr,
2191 tx_ring->total_packets,
2192 tx_ring->total_bytes);
2193 q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
2194 q_vector->rx_itr,
2195 rx_ring->total_packets,
2196 rx_ring->total_bytes);
2197
2198 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
2199
2200 switch (current_itr) {
2201 /* counts and packets in update_itr are dependent on these numbers */
2202 case lowest_latency:
2203 new_itr = 100000;
2204 break;
2205 case low_latency:
2206 new_itr = 20000; /* aka hwitr = ~200 */
2207 break;
2208 case bulk_latency:
2209 new_itr = 8000;
2210 break;
2211 default:
2212 break;
2213 }
2214
2215 if (new_itr != q_vector->eitr) {
2216 /* do an exponential smoothing */
2217 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
2218
2219 /* save the algorithm value here, not the smoothed one */
2220 q_vector->eitr = new_itr;
2221
2222 ixgbe_write_eitr(q_vector);
2223 }
2224 }
2225
2226 /**
2227 * ixgbe_irq_enable - Enable default interrupt generation settings
2228 * @adapter: board private structure
2229 **/
2230 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
2231 bool flush)
2232 {
2233 u32 mask;
2234
2235 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
2236 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
2237 mask |= IXGBE_EIMS_GPI_SDP0;
2238 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
2239 mask |= IXGBE_EIMS_GPI_SDP1;
2240 if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
2241 mask |= IXGBE_EIMS_ECC;
2242 mask |= IXGBE_EIMS_GPI_SDP1;
2243 mask |= IXGBE_EIMS_GPI_SDP2;
2244 if (adapter->num_vfs)
2245 mask |= IXGBE_EIMS_MAILBOX;
2246 }
2247 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
2248 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
2249 mask |= IXGBE_EIMS_FLOW_DIR;
2250
2251 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
2252 if (queues)
2253 ixgbe_irq_enable_queues(adapter, ~0);
2254 if (flush)
2255 IXGBE_WRITE_FLUSH(&adapter->hw);
2256
2257 if (adapter->num_vfs > 32) {
2258 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
2259 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
2260 }
2261 }
2262
2263 /**
2264 * ixgbe_intr - legacy mode Interrupt Handler
2265 * @irq: interrupt number
2266 * @data: pointer to a network interface device structure
2267 **/
2268 static irqreturn_t ixgbe_intr(int irq, void *data)
2269 {
2270 struct net_device *netdev = data;
2271 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2272 struct ixgbe_hw *hw = &adapter->hw;
2273 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2274 u32 eicr;
2275
2276 /*
2277 * Workaround for silicon errata on 82598. Mask the interrupts
2278 * before the read of EICR.
2279 */
2280 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2281
2282 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2283 * therefore no explict interrupt disable is necessary */
2284 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2285 if (!eicr) {
2286 /*
2287 * shared interrupt alert!
2288 * make sure interrupts are enabled because the read will
2289 * have disabled interrupts due to EIAM
2290 * finish the workaround of silicon errata on 82598. Unmask
2291 * the interrupt that we masked before the EICR read.
2292 */
2293 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2294 ixgbe_irq_enable(adapter, true, true);
2295 return IRQ_NONE; /* Not our interrupt */
2296 }
2297
2298 if (eicr & IXGBE_EICR_LSC)
2299 ixgbe_check_lsc(adapter);
2300
2301 if (hw->mac.type == ixgbe_mac_82599EB)
2302 ixgbe_check_sfp_event(adapter, eicr);
2303
2304 ixgbe_check_fan_failure(adapter, eicr);
2305 if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
2306 ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)))
2307 schedule_work(&adapter->check_overtemp_task);
2308
2309 if (napi_schedule_prep(&(q_vector->napi))) {
2310 adapter->tx_ring[0]->total_packets = 0;
2311 adapter->tx_ring[0]->total_bytes = 0;
2312 adapter->rx_ring[0]->total_packets = 0;
2313 adapter->rx_ring[0]->total_bytes = 0;
2314 /* would disable interrupts here but EIAM disabled it */
2315 __napi_schedule(&(q_vector->napi));
2316 }
2317
2318 /*
2319 * re-enable link(maybe) and non-queue interrupts, no flush.
2320 * ixgbe_poll will re-enable the queue interrupts
2321 */
2322
2323 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2324 ixgbe_irq_enable(adapter, false, false);
2325
2326 return IRQ_HANDLED;
2327 }
2328
2329 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
2330 {
2331 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2332
2333 for (i = 0; i < q_vectors; i++) {
2334 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
2335 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
2336 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
2337 q_vector->rxr_count = 0;
2338 q_vector->txr_count = 0;
2339 }
2340 }
2341
2342 /**
2343 * ixgbe_request_irq - initialize interrupts
2344 * @adapter: board private structure
2345 *
2346 * Attempts to configure interrupts using the best available
2347 * capabilities of the hardware and kernel.
2348 **/
2349 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
2350 {
2351 struct net_device *netdev = adapter->netdev;
2352 int err;
2353
2354 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2355 err = ixgbe_request_msix_irqs(adapter);
2356 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
2357 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
2358 netdev->name, netdev);
2359 } else {
2360 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
2361 netdev->name, netdev);
2362 }
2363
2364 if (err)
2365 e_err(probe, "request_irq failed, Error %d\n", err);
2366
2367 return err;
2368 }
2369
2370 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
2371 {
2372 struct net_device *netdev = adapter->netdev;
2373
2374 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2375 int i, q_vectors;
2376
2377 q_vectors = adapter->num_msix_vectors;
2378
2379 i = q_vectors - 1;
2380 free_irq(adapter->msix_entries[i].vector, netdev);
2381
2382 i--;
2383 for (; i >= 0; i--) {
2384 free_irq(adapter->msix_entries[i].vector,
2385 adapter->q_vector[i]);
2386 }
2387
2388 ixgbe_reset_q_vectors(adapter);
2389 } else {
2390 free_irq(adapter->pdev->irq, netdev);
2391 }
2392 }
2393
2394 /**
2395 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
2396 * @adapter: board private structure
2397 **/
2398 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
2399 {
2400 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2401 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
2402 } else {
2403 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
2404 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
2405 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
2406 if (adapter->num_vfs > 32)
2407 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
2408 }
2409 IXGBE_WRITE_FLUSH(&adapter->hw);
2410 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2411 int i;
2412 for (i = 0; i < adapter->num_msix_vectors; i++)
2413 synchronize_irq(adapter->msix_entries[i].vector);
2414 } else {
2415 synchronize_irq(adapter->pdev->irq);
2416 }
2417 }
2418
2419 /**
2420 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
2421 *
2422 **/
2423 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
2424 {
2425 struct ixgbe_hw *hw = &adapter->hw;
2426
2427 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
2428 EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr_param));
2429
2430 ixgbe_set_ivar(adapter, 0, 0, 0);
2431 ixgbe_set_ivar(adapter, 1, 0, 0);
2432
2433 map_vector_to_rxq(adapter, 0, 0);
2434 map_vector_to_txq(adapter, 0, 0);
2435
2436 e_info(hw, "Legacy interrupt IVAR setup done\n");
2437 }
2438
2439 /**
2440 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
2441 * @adapter: board private structure
2442 * @ring: structure containing ring specific data
2443 *
2444 * Configure the Tx descriptor ring after a reset.
2445 **/
2446 void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
2447 struct ixgbe_ring *ring)
2448 {
2449 struct ixgbe_hw *hw = &adapter->hw;
2450 u64 tdba = ring->dma;
2451 int wait_loop = 10;
2452 u32 txdctl;
2453 u16 reg_idx = ring->reg_idx;
2454
2455 /* disable queue to avoid issues while updating state */
2456 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2457 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx),
2458 txdctl & ~IXGBE_TXDCTL_ENABLE);
2459 IXGBE_WRITE_FLUSH(hw);
2460
2461 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
2462 (tdba & DMA_BIT_MASK(32)));
2463 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
2464 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
2465 ring->count * sizeof(union ixgbe_adv_tx_desc));
2466 IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
2467 IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
2468 ring->tail = hw->hw_addr + IXGBE_TDT(reg_idx);
2469
2470 /* configure fetching thresholds */
2471 if (adapter->rx_itr_setting == 0) {
2472 /* cannot set wthresh when itr==0 */
2473 txdctl &= ~0x007F0000;
2474 } else {
2475 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
2476 txdctl |= (8 << 16);
2477 }
2478 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2479 /* PThresh workaround for Tx hang with DFP enabled. */
2480 txdctl |= 32;
2481 }
2482
2483 /* reinitialize flowdirector state */
2484 set_bit(__IXGBE_FDIR_INIT_DONE, &ring->reinit_state);
2485
2486 /* enable queue */
2487 txdctl |= IXGBE_TXDCTL_ENABLE;
2488 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
2489
2490 /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2491 if (hw->mac.type == ixgbe_mac_82598EB &&
2492 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2493 return;
2494
2495 /* poll to verify queue is enabled */
2496 do {
2497 msleep(1);
2498 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2499 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
2500 if (!wait_loop)
2501 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx);
2502 }
2503
2504 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
2505 {
2506 struct ixgbe_hw *hw = &adapter->hw;
2507 u32 rttdcs;
2508 u32 mask;
2509
2510 if (hw->mac.type == ixgbe_mac_82598EB)
2511 return;
2512
2513 /* disable the arbiter while setting MTQC */
2514 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
2515 rttdcs |= IXGBE_RTTDCS_ARBDIS;
2516 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2517
2518 /* set transmit pool layout */
2519 mask = (IXGBE_FLAG_SRIOV_ENABLED | IXGBE_FLAG_DCB_ENABLED);
2520 switch (adapter->flags & mask) {
2521
2522 case (IXGBE_FLAG_SRIOV_ENABLED):
2523 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2524 (IXGBE_MTQC_VT_ENA | IXGBE_MTQC_64VF));
2525 break;
2526
2527 case (IXGBE_FLAG_DCB_ENABLED):
2528 /* We enable 8 traffic classes, DCB only */
2529 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2530 (IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ));
2531 break;
2532
2533 default:
2534 IXGBE_WRITE_REG(hw, IXGBE_MTQC, IXGBE_MTQC_64Q_1PB);
2535 break;
2536 }
2537
2538 /* re-enable the arbiter */
2539 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
2540 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2541 }
2542
2543 /**
2544 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
2545 * @adapter: board private structure
2546 *
2547 * Configure the Tx unit of the MAC after a reset.
2548 **/
2549 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
2550 {
2551 struct ixgbe_hw *hw = &adapter->hw;
2552 u32 dmatxctl;
2553 u32 i;
2554
2555 ixgbe_setup_mtqc(adapter);
2556
2557 if (hw->mac.type != ixgbe_mac_82598EB) {
2558 /* DMATXCTL.EN must be before Tx queues are enabled */
2559 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2560 dmatxctl |= IXGBE_DMATXCTL_TE;
2561 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2562 }
2563
2564 /* Setup the HW Tx Head and Tail descriptor pointers */
2565 for (i = 0; i < adapter->num_tx_queues; i++)
2566 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
2567 }
2568
2569 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
2570
2571 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
2572 struct ixgbe_ring *rx_ring)
2573 {
2574 u32 srrctl;
2575 int index;
2576 struct ixgbe_ring_feature *feature = adapter->ring_feature;
2577
2578 index = rx_ring->reg_idx;
2579 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2580 unsigned long mask;
2581 mask = (unsigned long) feature[RING_F_RSS].mask;
2582 index = index & mask;
2583 }
2584 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
2585
2586 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
2587 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
2588 if (adapter->num_vfs)
2589 srrctl |= IXGBE_SRRCTL_DROP_EN;
2590
2591 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
2592 IXGBE_SRRCTL_BSIZEHDR_MASK;
2593
2594 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2595 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
2596 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2597 #else
2598 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2599 #endif
2600 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
2601 } else {
2602 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
2603 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2604 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
2605 }
2606
2607 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
2608 }
2609
2610 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
2611 {
2612 struct ixgbe_hw *hw = &adapter->hw;
2613 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2614 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2615 0x6A3E67EA, 0x14364D17, 0x3BED200D};
2616 u32 mrqc = 0, reta = 0;
2617 u32 rxcsum;
2618 int i, j;
2619 int mask;
2620
2621 /* Fill out hash function seeds */
2622 for (i = 0; i < 10; i++)
2623 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2624
2625 /* Fill out redirection table */
2626 for (i = 0, j = 0; i < 128; i++, j++) {
2627 if (j == adapter->ring_feature[RING_F_RSS].indices)
2628 j = 0;
2629 /* reta = 4-byte sliding window of
2630 * 0x00..(indices-1)(indices-1)00..etc. */
2631 reta = (reta << 8) | (j * 0x11);
2632 if ((i & 3) == 3)
2633 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2634 }
2635
2636 /* Disable indicating checksum in descriptor, enables RSS hash */
2637 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2638 rxcsum |= IXGBE_RXCSUM_PCSD;
2639 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2640
2641 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
2642 mask = adapter->flags & IXGBE_FLAG_RSS_ENABLED;
2643 else
2644 mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
2645 #ifdef CONFIG_IXGBE_DCB
2646 | IXGBE_FLAG_DCB_ENABLED
2647 #endif
2648 | IXGBE_FLAG_SRIOV_ENABLED
2649 );
2650
2651 switch (mask) {
2652 case (IXGBE_FLAG_RSS_ENABLED):
2653 mrqc = IXGBE_MRQC_RSSEN;
2654 break;
2655 case (IXGBE_FLAG_SRIOV_ENABLED):
2656 mrqc = IXGBE_MRQC_VMDQEN;
2657 break;
2658 #ifdef CONFIG_IXGBE_DCB
2659 case (IXGBE_FLAG_DCB_ENABLED):
2660 mrqc = IXGBE_MRQC_RT8TCEN;
2661 break;
2662 #endif /* CONFIG_IXGBE_DCB */
2663 default:
2664 break;
2665 }
2666
2667 /* Perform hash on these packet types */
2668 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2669 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2670 | IXGBE_MRQC_RSS_FIELD_IPV6
2671 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
2672
2673 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2674 }
2675
2676 /**
2677 * ixgbe_configure_rscctl - enable RSC for the indicated ring
2678 * @adapter: address of board private structure
2679 * @index: index of ring to set
2680 **/
2681 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
2682 struct ixgbe_ring *ring)
2683 {
2684 struct ixgbe_hw *hw = &adapter->hw;
2685 u32 rscctrl;
2686 int rx_buf_len;
2687 u16 reg_idx = ring->reg_idx;
2688
2689 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
2690 return;
2691
2692 rx_buf_len = ring->rx_buf_len;
2693 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
2694 rscctrl |= IXGBE_RSCCTL_RSCEN;
2695 /*
2696 * we must limit the number of descriptors so that the
2697 * total size of max desc * buf_len is not greater
2698 * than 65535
2699 */
2700 if (ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2701 #if (MAX_SKB_FRAGS > 16)
2702 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2703 #elif (MAX_SKB_FRAGS > 8)
2704 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2705 #elif (MAX_SKB_FRAGS > 4)
2706 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2707 #else
2708 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2709 #endif
2710 } else {
2711 if (rx_buf_len < IXGBE_RXBUFFER_4096)
2712 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2713 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
2714 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2715 else
2716 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2717 }
2718 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
2719 }
2720
2721 /**
2722 * ixgbe_set_uta - Set unicast filter table address
2723 * @adapter: board private structure
2724 *
2725 * The unicast table address is a register array of 32-bit registers.
2726 * The table is meant to be used in a way similar to how the MTA is used
2727 * however due to certain limitations in the hardware it is necessary to
2728 * set all the hash bits to 1 and use the VMOLR ROPE bit as a promiscuous
2729 * enable bit to allow vlan tag stripping when promiscuous mode is enabled
2730 **/
2731 static void ixgbe_set_uta(struct ixgbe_adapter *adapter)
2732 {
2733 struct ixgbe_hw *hw = &adapter->hw;
2734 int i;
2735
2736 /* The UTA table only exists on 82599 hardware and newer */
2737 if (hw->mac.type < ixgbe_mac_82599EB)
2738 return;
2739
2740 /* we only need to do this if VMDq is enabled */
2741 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
2742 return;
2743
2744 for (i = 0; i < 128; i++)
2745 IXGBE_WRITE_REG(hw, IXGBE_UTA(i), ~0);
2746 }
2747
2748 #define IXGBE_MAX_RX_DESC_POLL 10
2749 static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
2750 struct ixgbe_ring *ring)
2751 {
2752 struct ixgbe_hw *hw = &adapter->hw;
2753 int reg_idx = ring->reg_idx;
2754 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
2755 u32 rxdctl;
2756
2757 /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2758 if (hw->mac.type == ixgbe_mac_82598EB &&
2759 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2760 return;
2761
2762 do {
2763 msleep(1);
2764 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2765 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
2766
2767 if (!wait_loop) {
2768 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
2769 "the polling period\n", reg_idx);
2770 }
2771 }
2772
2773 void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
2774 struct ixgbe_ring *ring)
2775 {
2776 struct ixgbe_hw *hw = &adapter->hw;
2777 u64 rdba = ring->dma;
2778 u32 rxdctl;
2779 u16 reg_idx = ring->reg_idx;
2780
2781 /* disable queue to avoid issues while updating state */
2782 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2783 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx),
2784 rxdctl & ~IXGBE_RXDCTL_ENABLE);
2785 IXGBE_WRITE_FLUSH(hw);
2786
2787 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
2788 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
2789 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
2790 ring->count * sizeof(union ixgbe_adv_rx_desc));
2791 IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
2792 IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
2793 ring->tail = hw->hw_addr + IXGBE_RDT(reg_idx);
2794
2795 ixgbe_configure_srrctl(adapter, ring);
2796 ixgbe_configure_rscctl(adapter, ring);
2797
2798 if (hw->mac.type == ixgbe_mac_82598EB) {
2799 /*
2800 * enable cache line friendly hardware writes:
2801 * PTHRESH=32 descriptors (half the internal cache),
2802 * this also removes ugly rx_no_buffer_count increment
2803 * HTHRESH=4 descriptors (to minimize latency on fetch)
2804 * WTHRESH=8 burst writeback up to two cache lines
2805 */
2806 rxdctl &= ~0x3FFFFF;
2807 rxdctl |= 0x080420;
2808 }
2809
2810 /* enable receive descriptor ring */
2811 rxdctl |= IXGBE_RXDCTL_ENABLE;
2812 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
2813
2814 ixgbe_rx_desc_queue_enable(adapter, ring);
2815 ixgbe_alloc_rx_buffers(ring, IXGBE_DESC_UNUSED(ring));
2816 }
2817
2818 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
2819 {
2820 struct ixgbe_hw *hw = &adapter->hw;
2821 int p;
2822
2823 /* PSRTYPE must be initialized in non 82598 adapters */
2824 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
2825 IXGBE_PSRTYPE_UDPHDR |
2826 IXGBE_PSRTYPE_IPV4HDR |
2827 IXGBE_PSRTYPE_L2HDR |
2828 IXGBE_PSRTYPE_IPV6HDR;
2829
2830 if (hw->mac.type == ixgbe_mac_82598EB)
2831 return;
2832
2833 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED)
2834 psrtype |= (adapter->num_rx_queues_per_pool << 29);
2835
2836 for (p = 0; p < adapter->num_rx_pools; p++)
2837 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(adapter->num_vfs + p),
2838 psrtype);
2839 }
2840
2841 static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
2842 {
2843 struct ixgbe_hw *hw = &adapter->hw;
2844 u32 gcr_ext;
2845 u32 vt_reg_bits;
2846 u32 reg_offset, vf_shift;
2847 u32 vmdctl;
2848
2849 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
2850 return;
2851
2852 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
2853 vt_reg_bits = IXGBE_VMD_CTL_VMDQ_EN | IXGBE_VT_CTL_REPLEN;
2854 vt_reg_bits |= (adapter->num_vfs << IXGBE_VT_CTL_POOL_SHIFT);
2855 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl | vt_reg_bits);
2856
2857 vf_shift = adapter->num_vfs % 32;
2858 reg_offset = (adapter->num_vfs > 32) ? 1 : 0;
2859
2860 /* Enable only the PF's pool for Tx/Rx */
2861 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (1 << vf_shift));
2862 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), 0);
2863 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (1 << vf_shift));
2864 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), 0);
2865 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
2866
2867 /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
2868 hw->mac.ops.set_vmdq(hw, 0, adapter->num_vfs);
2869
2870 /*
2871 * Set up VF register offsets for selected VT Mode,
2872 * i.e. 32 or 64 VFs for SR-IOV
2873 */
2874 gcr_ext = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
2875 gcr_ext |= IXGBE_GCR_EXT_MSIX_EN;
2876 gcr_ext |= IXGBE_GCR_EXT_VT_MODE_64;
2877 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
2878
2879 /* enable Tx loopback for VF/PF communication */
2880 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
2881 }
2882
2883 static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
2884 {
2885 struct ixgbe_hw *hw = &adapter->hw;
2886 struct net_device *netdev = adapter->netdev;
2887 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2888 int rx_buf_len;
2889 struct ixgbe_ring *rx_ring;
2890 int i;
2891 u32 mhadd, hlreg0;
2892
2893 /* Decide whether to use packet split mode or not */
2894 /* Do not use packet split if we're in SR-IOV Mode */
2895 if (!adapter->num_vfs)
2896 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
2897
2898 /* Set the RX buffer length according to the mode */
2899 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
2900 rx_buf_len = IXGBE_RX_HDR_SIZE;
2901 } else {
2902 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
2903 (netdev->mtu <= ETH_DATA_LEN))
2904 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
2905 else
2906 rx_buf_len = ALIGN(max_frame + VLAN_HLEN, 1024);
2907 }
2908
2909 #ifdef IXGBE_FCOE
2910 /* adjust max frame to be able to do baby jumbo for FCoE */
2911 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
2912 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
2913 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
2914
2915 #endif /* IXGBE_FCOE */
2916 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
2917 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
2918 mhadd &= ~IXGBE_MHADD_MFS_MASK;
2919 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
2920
2921 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
2922 }
2923
2924 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
2925 /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
2926 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2927 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
2928
2929 /*
2930 * Setup the HW Rx Head and Tail Descriptor Pointers and
2931 * the Base and Length of the Rx Descriptor Ring
2932 */
2933 for (i = 0; i < adapter->num_rx_queues; i++) {
2934 rx_ring = adapter->rx_ring[i];
2935 rx_ring->rx_buf_len = rx_buf_len;
2936
2937 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
2938 rx_ring->flags |= IXGBE_RING_RX_PS_ENABLED;
2939 else
2940 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2941
2942 #ifdef IXGBE_FCOE
2943 if (netdev->features & NETIF_F_FCOE_MTU) {
2944 struct ixgbe_ring_feature *f;
2945 f = &adapter->ring_feature[RING_F_FCOE];
2946 if ((i >= f->mask) && (i < f->mask + f->indices)) {
2947 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2948 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
2949 rx_ring->rx_buf_len =
2950 IXGBE_FCOE_JUMBO_FRAME_SIZE;
2951 }
2952 }
2953 #endif /* IXGBE_FCOE */
2954 }
2955
2956 }
2957
2958 static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
2959 {
2960 struct ixgbe_hw *hw = &adapter->hw;
2961 u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2962
2963 switch (hw->mac.type) {
2964 case ixgbe_mac_82598EB:
2965 /*
2966 * For VMDq support of different descriptor types or
2967 * buffer sizes through the use of multiple SRRCTL
2968 * registers, RDRXCTL.MVMEN must be set to 1
2969 *
2970 * also, the manual doesn't mention it clearly but DCA hints
2971 * will only use queue 0's tags unless this bit is set. Side
2972 * effects of setting this bit are only that SRRCTL must be
2973 * fully programmed [0..15]
2974 */
2975 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
2976 break;
2977 case ixgbe_mac_82599EB:
2978 /* Disable RSC for ACK packets */
2979 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
2980 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
2981 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
2982 /* hardware requires some bits to be set by default */
2983 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
2984 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
2985 break;
2986 default:
2987 /* We should do nothing since we don't know this hardware */
2988 return;
2989 }
2990
2991 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2992 }
2993
2994 /**
2995 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
2996 * @adapter: board private structure
2997 *
2998 * Configure the Rx unit of the MAC after a reset.
2999 **/
3000 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
3001 {
3002 struct ixgbe_hw *hw = &adapter->hw;
3003 int i;
3004 u32 rxctrl;
3005
3006 /* disable receives while setting up the descriptors */
3007 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3008 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3009
3010 ixgbe_setup_psrtype(adapter);
3011 ixgbe_setup_rdrxctl(adapter);
3012
3013 /* Program registers for the distribution of queues */
3014 ixgbe_setup_mrqc(adapter);
3015
3016 ixgbe_set_uta(adapter);
3017
3018 /* set_rx_buffer_len must be called before ring initialization */
3019 ixgbe_set_rx_buffer_len(adapter);
3020
3021 /*
3022 * Setup the HW Rx Head and Tail Descriptor Pointers and
3023 * the Base and Length of the Rx Descriptor Ring
3024 */
3025 for (i = 0; i < adapter->num_rx_queues; i++)
3026 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
3027
3028 /* disable drop enable for 82598 parts */
3029 if (hw->mac.type == ixgbe_mac_82598EB)
3030 rxctrl |= IXGBE_RXCTRL_DMBYPS;
3031
3032 /* enable all receives */
3033 rxctrl |= IXGBE_RXCTRL_RXEN;
3034 hw->mac.ops.enable_rx_dma(hw, rxctrl);
3035 }
3036
3037 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
3038 {
3039 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3040 struct ixgbe_hw *hw = &adapter->hw;
3041 int pool_ndx = adapter->num_vfs;
3042
3043 /* add VID to filter table */
3044 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, true);
3045 set_bit(vid, adapter->active_vlans);
3046 }
3047
3048 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
3049 {
3050 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3051 struct ixgbe_hw *hw = &adapter->hw;
3052 int pool_ndx = adapter->num_vfs;
3053
3054 /* remove VID from filter table */
3055 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, false);
3056 clear_bit(vid, adapter->active_vlans);
3057 }
3058
3059 /**
3060 * ixgbe_vlan_filter_disable - helper to disable hw vlan filtering
3061 * @adapter: driver data
3062 */
3063 static void ixgbe_vlan_filter_disable(struct ixgbe_adapter *adapter)
3064 {
3065 struct ixgbe_hw *hw = &adapter->hw;
3066 u32 vlnctrl;
3067
3068 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3069 vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
3070 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3071 }
3072
3073 /**
3074 * ixgbe_vlan_filter_enable - helper to enable hw vlan filtering
3075 * @adapter: driver data
3076 */
3077 static void ixgbe_vlan_filter_enable(struct ixgbe_adapter *adapter)
3078 {
3079 struct ixgbe_hw *hw = &adapter->hw;
3080 u32 vlnctrl;
3081
3082 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3083 vlnctrl |= IXGBE_VLNCTRL_VFE;
3084 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
3085 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3086 }
3087
3088 /**
3089 * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping
3090 * @adapter: driver data
3091 */
3092 static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
3093 {
3094 struct ixgbe_hw *hw = &adapter->hw;
3095 u32 vlnctrl;
3096 int i, j;
3097
3098 switch (hw->mac.type) {
3099 case ixgbe_mac_82598EB:
3100 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3101 vlnctrl &= ~IXGBE_VLNCTRL_VME;
3102 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3103 break;
3104 case ixgbe_mac_82599EB:
3105 for (i = 0; i < adapter->num_rx_queues; i++) {
3106 j = adapter->rx_ring[i]->reg_idx;
3107 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3108 vlnctrl &= ~IXGBE_RXDCTL_VME;
3109 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3110 }
3111 break;
3112 default:
3113 break;
3114 }
3115 }
3116
3117 /**
3118 * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping
3119 * @adapter: driver data
3120 */
3121 static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
3122 {
3123 struct ixgbe_hw *hw = &adapter->hw;
3124 u32 vlnctrl;
3125 int i, j;
3126
3127 switch (hw->mac.type) {
3128 case ixgbe_mac_82598EB:
3129 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3130 vlnctrl |= IXGBE_VLNCTRL_VME;
3131 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3132 break;
3133 case ixgbe_mac_82599EB:
3134 for (i = 0; i < adapter->num_rx_queues; i++) {
3135 j = adapter->rx_ring[i]->reg_idx;
3136 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3137 vlnctrl |= IXGBE_RXDCTL_VME;
3138 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3139 }
3140 break;
3141 default:
3142 break;
3143 }
3144 }
3145
3146 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
3147 {
3148 u16 vid;
3149
3150 ixgbe_vlan_rx_add_vid(adapter->netdev, 0);
3151
3152 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
3153 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
3154 }
3155
3156 /**
3157 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
3158 * @netdev: network interface device structure
3159 *
3160 * Writes unicast address list to the RAR table.
3161 * Returns: -ENOMEM on failure/insufficient address space
3162 * 0 on no addresses written
3163 * X on writing X addresses to the RAR table
3164 **/
3165 static int ixgbe_write_uc_addr_list(struct net_device *netdev)
3166 {
3167 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3168 struct ixgbe_hw *hw = &adapter->hw;
3169 unsigned int vfn = adapter->num_vfs;
3170 unsigned int rar_entries = hw->mac.num_rar_entries - (vfn + 1);
3171 int count = 0;
3172
3173 /* return ENOMEM indicating insufficient memory for addresses */
3174 if (netdev_uc_count(netdev) > rar_entries)
3175 return -ENOMEM;
3176
3177 if (!netdev_uc_empty(netdev) && rar_entries) {
3178 struct netdev_hw_addr *ha;
3179 /* return error if we do not support writing to RAR table */
3180 if (!hw->mac.ops.set_rar)
3181 return -ENOMEM;
3182
3183 netdev_for_each_uc_addr(ha, netdev) {
3184 if (!rar_entries)
3185 break;
3186 hw->mac.ops.set_rar(hw, rar_entries--, ha->addr,
3187 vfn, IXGBE_RAH_AV);
3188 count++;
3189 }
3190 }
3191 /* write the addresses in reverse order to avoid write combining */
3192 for (; rar_entries > 0 ; rar_entries--)
3193 hw->mac.ops.clear_rar(hw, rar_entries);
3194
3195 return count;
3196 }
3197
3198 /**
3199 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
3200 * @netdev: network interface device structure
3201 *
3202 * The set_rx_method entry point is called whenever the unicast/multicast
3203 * address list or the network interface flags are updated. This routine is
3204 * responsible for configuring the hardware for proper unicast, multicast and
3205 * promiscuous mode.
3206 **/
3207 void ixgbe_set_rx_mode(struct net_device *netdev)
3208 {
3209 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3210 struct ixgbe_hw *hw = &adapter->hw;
3211 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
3212 int count;
3213
3214 /* Check for Promiscuous and All Multicast modes */
3215
3216 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3217
3218 /* set all bits that we expect to always be set */
3219 fctrl |= IXGBE_FCTRL_BAM;
3220 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
3221 fctrl |= IXGBE_FCTRL_PMCF;
3222
3223 /* clear the bits we are changing the status of */
3224 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3225
3226 if (netdev->flags & IFF_PROMISC) {
3227 hw->addr_ctrl.user_set_promisc = true;
3228 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3229 vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_MPE);
3230 /* don't hardware filter vlans in promisc mode */
3231 ixgbe_vlan_filter_disable(adapter);
3232 } else {
3233 if (netdev->flags & IFF_ALLMULTI) {
3234 fctrl |= IXGBE_FCTRL_MPE;
3235 vmolr |= IXGBE_VMOLR_MPE;
3236 } else {
3237 /*
3238 * Write addresses to the MTA, if the attempt fails
3239 * then we should just turn on promiscous mode so
3240 * that we can at least receive multicast traffic
3241 */
3242 hw->mac.ops.update_mc_addr_list(hw, netdev);
3243 vmolr |= IXGBE_VMOLR_ROMPE;
3244 }
3245 ixgbe_vlan_filter_enable(adapter);
3246 hw->addr_ctrl.user_set_promisc = false;
3247 /*
3248 * Write addresses to available RAR registers, if there is not
3249 * sufficient space to store all the addresses then enable
3250 * unicast promiscous mode
3251 */
3252 count = ixgbe_write_uc_addr_list(netdev);
3253 if (count < 0) {
3254 fctrl |= IXGBE_FCTRL_UPE;
3255 vmolr |= IXGBE_VMOLR_ROPE;
3256 }
3257 }
3258
3259 if (adapter->num_vfs) {
3260 ixgbe_restore_vf_multicasts(adapter);
3261 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(adapter->num_vfs)) &
3262 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
3263 IXGBE_VMOLR_ROPE);
3264 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(adapter->num_vfs), vmolr);
3265 }
3266
3267 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
3268
3269 if (netdev->features & NETIF_F_HW_VLAN_RX)
3270 ixgbe_vlan_strip_enable(adapter);
3271 else
3272 ixgbe_vlan_strip_disable(adapter);
3273 }
3274
3275 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
3276 {
3277 int q_idx;
3278 struct ixgbe_q_vector *q_vector;
3279 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3280
3281 /* legacy and MSI only use one vector */
3282 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3283 q_vectors = 1;
3284
3285 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3286 struct napi_struct *napi;
3287 q_vector = adapter->q_vector[q_idx];
3288 napi = &q_vector->napi;
3289 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3290 if (!q_vector->rxr_count || !q_vector->txr_count) {
3291 if (q_vector->txr_count == 1)
3292 napi->poll = &ixgbe_clean_txonly;
3293 else if (q_vector->rxr_count == 1)
3294 napi->poll = &ixgbe_clean_rxonly;
3295 }
3296 }
3297
3298 napi_enable(napi);
3299 }
3300 }
3301
3302 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
3303 {
3304 int q_idx;
3305 struct ixgbe_q_vector *q_vector;
3306 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3307
3308 /* legacy and MSI only use one vector */
3309 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3310 q_vectors = 1;
3311
3312 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3313 q_vector = adapter->q_vector[q_idx];
3314 napi_disable(&q_vector->napi);
3315 }
3316 }
3317
3318 #ifdef CONFIG_IXGBE_DCB
3319 /*
3320 * ixgbe_configure_dcb - Configure DCB hardware
3321 * @adapter: ixgbe adapter struct
3322 *
3323 * This is called by the driver on open to configure the DCB hardware.
3324 * This is also called by the gennetlink interface when reconfiguring
3325 * the DCB state.
3326 */
3327 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
3328 {
3329 struct ixgbe_hw *hw = &adapter->hw;
3330 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3331
3332 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
3333 if (hw->mac.type == ixgbe_mac_82598EB)
3334 netif_set_gso_max_size(adapter->netdev, 65536);
3335 return;
3336 }
3337
3338 if (hw->mac.type == ixgbe_mac_82598EB)
3339 netif_set_gso_max_size(adapter->netdev, 32768);
3340
3341 #ifdef CONFIG_FCOE
3342 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
3343 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
3344 #endif
3345
3346 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3347 DCB_TX_CONFIG);
3348 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3349 DCB_RX_CONFIG);
3350
3351 /* Enable VLAN tag insert/strip */
3352 adapter->netdev->features |= NETIF_F_HW_VLAN_RX;
3353
3354 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
3355
3356 /* reconfigure the hardware */
3357 ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
3358 }
3359
3360 #endif
3361 static void ixgbe_configure(struct ixgbe_adapter *adapter)
3362 {
3363 struct net_device *netdev = adapter->netdev;
3364 struct ixgbe_hw *hw = &adapter->hw;
3365 int i;
3366
3367 #ifdef CONFIG_IXGBE_DCB
3368 ixgbe_configure_dcb(adapter);
3369 #endif
3370
3371 ixgbe_set_rx_mode(netdev);
3372 ixgbe_restore_vlan(adapter);
3373
3374 #ifdef IXGBE_FCOE
3375 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
3376 ixgbe_configure_fcoe(adapter);
3377
3378 #endif /* IXGBE_FCOE */
3379 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3380 for (i = 0; i < adapter->num_tx_queues; i++)
3381 adapter->tx_ring[i]->atr_sample_rate =
3382 adapter->atr_sample_rate;
3383 ixgbe_init_fdir_signature_82599(hw, adapter->fdir_pballoc);
3384 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
3385 ixgbe_init_fdir_perfect_82599(hw, adapter->fdir_pballoc);
3386 }
3387 ixgbe_configure_virtualization(adapter);
3388
3389 ixgbe_configure_tx(adapter);
3390 ixgbe_configure_rx(adapter);
3391 }
3392
3393 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
3394 {
3395 switch (hw->phy.type) {
3396 case ixgbe_phy_sfp_avago:
3397 case ixgbe_phy_sfp_ftl:
3398 case ixgbe_phy_sfp_intel:
3399 case ixgbe_phy_sfp_unknown:
3400 case ixgbe_phy_sfp_passive_tyco:
3401 case ixgbe_phy_sfp_passive_unknown:
3402 case ixgbe_phy_sfp_active_unknown:
3403 case ixgbe_phy_sfp_ftl_active:
3404 return true;
3405 default:
3406 return false;
3407 }
3408 }
3409
3410 /**
3411 * ixgbe_sfp_link_config - set up SFP+ link
3412 * @adapter: pointer to private adapter struct
3413 **/
3414 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
3415 {
3416 struct ixgbe_hw *hw = &adapter->hw;
3417
3418 if (hw->phy.multispeed_fiber) {
3419 /*
3420 * In multispeed fiber setups, the device may not have
3421 * had a physical connection when the driver loaded.
3422 * If that's the case, the initial link configuration
3423 * couldn't get the MAC into 10G or 1G mode, so we'll
3424 * never have a link status change interrupt fire.
3425 * We need to try and force an autonegotiation
3426 * session, then bring up link.
3427 */
3428 hw->mac.ops.setup_sfp(hw);
3429 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
3430 schedule_work(&adapter->multispeed_fiber_task);
3431 } else {
3432 /*
3433 * Direct Attach Cu and non-multispeed fiber modules
3434 * still need to be configured properly prior to
3435 * attempting link.
3436 */
3437 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_MOD_TASK))
3438 schedule_work(&adapter->sfp_config_module_task);
3439 }
3440 }
3441
3442 /**
3443 * ixgbe_non_sfp_link_config - set up non-SFP+ link
3444 * @hw: pointer to private hardware struct
3445 *
3446 * Returns 0 on success, negative on failure
3447 **/
3448 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
3449 {
3450 u32 autoneg;
3451 bool negotiation, link_up = false;
3452 u32 ret = IXGBE_ERR_LINK_SETUP;
3453
3454 if (hw->mac.ops.check_link)
3455 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
3456
3457 if (ret)
3458 goto link_cfg_out;
3459
3460 if (hw->mac.ops.get_link_capabilities)
3461 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg,
3462 &negotiation);
3463 if (ret)
3464 goto link_cfg_out;
3465
3466 if (hw->mac.ops.setup_link)
3467 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
3468 link_cfg_out:
3469 return ret;
3470 }
3471
3472 static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
3473 {
3474 struct ixgbe_hw *hw = &adapter->hw;
3475 u32 gpie = 0;
3476
3477 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3478 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
3479 IXGBE_GPIE_OCD;
3480 gpie |= IXGBE_GPIE_EIAME;
3481 /*
3482 * use EIAM to auto-mask when MSI-X interrupt is asserted
3483 * this saves a register write for every interrupt
3484 */
3485 switch (hw->mac.type) {
3486 case ixgbe_mac_82598EB:
3487 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3488 break;
3489 default:
3490 case ixgbe_mac_82599EB:
3491 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
3492 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
3493 break;
3494 }
3495 } else {
3496 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
3497 * specifically only auto mask tx and rx interrupts */
3498 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3499 }
3500
3501 /* XXX: to interrupt immediately for EICS writes, enable this */
3502 /* gpie |= IXGBE_GPIE_EIMEN; */
3503
3504 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3505 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
3506 gpie |= IXGBE_GPIE_VTMODE_64;
3507 }
3508
3509 /* Enable fan failure interrupt */
3510 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
3511 gpie |= IXGBE_SDP1_GPIEN;
3512
3513 if (hw->mac.type == ixgbe_mac_82599EB)
3514 gpie |= IXGBE_SDP1_GPIEN;
3515 gpie |= IXGBE_SDP2_GPIEN;
3516
3517 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3518 }
3519
3520 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
3521 {
3522 struct ixgbe_hw *hw = &adapter->hw;
3523 int err;
3524 u32 ctrl_ext;
3525
3526 ixgbe_get_hw_control(adapter);
3527 ixgbe_setup_gpie(adapter);
3528
3529 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3530 ixgbe_configure_msix(adapter);
3531 else
3532 ixgbe_configure_msi_and_legacy(adapter);
3533
3534 /* enable the optics */
3535 if (hw->phy.multispeed_fiber)
3536 hw->mac.ops.enable_tx_laser(hw);
3537
3538 clear_bit(__IXGBE_DOWN, &adapter->state);
3539 ixgbe_napi_enable_all(adapter);
3540
3541 /* clear any pending interrupts, may auto mask */
3542 IXGBE_READ_REG(hw, IXGBE_EICR);
3543 ixgbe_irq_enable(adapter, true, true);
3544
3545 /*
3546 * If this adapter has a fan, check to see if we had a failure
3547 * before we enabled the interrupt.
3548 */
3549 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
3550 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
3551 if (esdp & IXGBE_ESDP_SDP1)
3552 e_crit(drv, "Fan has stopped, replace the adapter\n");
3553 }
3554
3555 /*
3556 * For hot-pluggable SFP+ devices, a new SFP+ module may have
3557 * arrived before interrupts were enabled but after probe. Such
3558 * devices wouldn't have their type identified yet. We need to
3559 * kick off the SFP+ module setup first, then try to bring up link.
3560 * If we're not hot-pluggable SFP+, we just need to configure link
3561 * and bring it up.
3562 */
3563 if (hw->phy.type == ixgbe_phy_unknown) {
3564 err = hw->phy.ops.identify(hw);
3565 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
3566 /*
3567 * Take the device down and schedule the sfp tasklet
3568 * which will unregister_netdev and log it.
3569 */
3570 ixgbe_down(adapter);
3571 schedule_work(&adapter->sfp_config_module_task);
3572 return err;
3573 }
3574 }
3575
3576 if (ixgbe_is_sfp(hw)) {
3577 ixgbe_sfp_link_config(adapter);
3578 } else {
3579 err = ixgbe_non_sfp_link_config(hw);
3580 if (err)
3581 e_err(probe, "link_config FAILED %d\n", err);
3582 }
3583
3584 /* enable transmits */
3585 netif_tx_start_all_queues(adapter->netdev);
3586
3587 /* bring the link up in the watchdog, this could race with our first
3588 * link up interrupt but shouldn't be a problem */
3589 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
3590 adapter->link_check_timeout = jiffies;
3591 mod_timer(&adapter->watchdog_timer, jiffies);
3592
3593 /* Set PF Reset Done bit so PF/VF Mail Ops can work */
3594 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
3595 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
3596 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
3597
3598 return 0;
3599 }
3600
3601 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
3602 {
3603 WARN_ON(in_interrupt());
3604 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
3605 msleep(1);
3606 ixgbe_down(adapter);
3607 /*
3608 * If SR-IOV enabled then wait a bit before bringing the adapter
3609 * back up to give the VFs time to respond to the reset. The
3610 * two second wait is based upon the watchdog timer cycle in
3611 * the VF driver.
3612 */
3613 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3614 msleep(2000);
3615 ixgbe_up(adapter);
3616 clear_bit(__IXGBE_RESETTING, &adapter->state);
3617 }
3618
3619 int ixgbe_up(struct ixgbe_adapter *adapter)
3620 {
3621 /* hardware has been reset, we need to reload some things */
3622 ixgbe_configure(adapter);
3623
3624 return ixgbe_up_complete(adapter);
3625 }
3626
3627 void ixgbe_reset(struct ixgbe_adapter *adapter)
3628 {
3629 struct ixgbe_hw *hw = &adapter->hw;
3630 int err;
3631
3632 err = hw->mac.ops.init_hw(hw);
3633 switch (err) {
3634 case 0:
3635 case IXGBE_ERR_SFP_NOT_PRESENT:
3636 break;
3637 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
3638 e_dev_err("master disable timed out\n");
3639 break;
3640 case IXGBE_ERR_EEPROM_VERSION:
3641 /* We are running on a pre-production device, log a warning */
3642 e_dev_warn("This device is a pre-production adapter/LOM. "
3643 "Please be aware there may be issuesassociated with "
3644 "your hardware. If you are experiencing problems "
3645 "please contact your Intel or hardware "
3646 "representative who provided you with this "
3647 "hardware.\n");
3648 break;
3649 default:
3650 e_dev_err("Hardware Error: %d\n", err);
3651 }
3652
3653 /* reprogram the RAR[0] in case user changed it. */
3654 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
3655 IXGBE_RAH_AV);
3656 }
3657
3658 /**
3659 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
3660 * @rx_ring: ring to free buffers from
3661 **/
3662 static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring)
3663 {
3664 struct device *dev = rx_ring->dev;
3665 unsigned long size;
3666 u16 i;
3667
3668 /* ring already cleared, nothing to do */
3669 if (!rx_ring->rx_buffer_info)
3670 return;
3671
3672 /* Free all the Rx ring sk_buffs */
3673 for (i = 0; i < rx_ring->count; i++) {
3674 struct ixgbe_rx_buffer *rx_buffer_info;
3675
3676 rx_buffer_info = &rx_ring->rx_buffer_info[i];
3677 if (rx_buffer_info->dma) {
3678 dma_unmap_single(rx_ring->dev, rx_buffer_info->dma,
3679 rx_ring->rx_buf_len,
3680 DMA_FROM_DEVICE);
3681 rx_buffer_info->dma = 0;
3682 }
3683 if (rx_buffer_info->skb) {
3684 struct sk_buff *skb = rx_buffer_info->skb;
3685 rx_buffer_info->skb = NULL;
3686 do {
3687 struct sk_buff *this = skb;
3688 if (IXGBE_RSC_CB(this)->delay_unmap) {
3689 dma_unmap_single(dev,
3690 IXGBE_RSC_CB(this)->dma,
3691 rx_ring->rx_buf_len,
3692 DMA_FROM_DEVICE);
3693 IXGBE_RSC_CB(this)->dma = 0;
3694 IXGBE_RSC_CB(skb)->delay_unmap = false;
3695 }
3696 skb = skb->prev;
3697 dev_kfree_skb(this);
3698 } while (skb);
3699 }
3700 if (!rx_buffer_info->page)
3701 continue;
3702 if (rx_buffer_info->page_dma) {
3703 dma_unmap_page(dev, rx_buffer_info->page_dma,
3704 PAGE_SIZE / 2, DMA_FROM_DEVICE);
3705 rx_buffer_info->page_dma = 0;
3706 }
3707 put_page(rx_buffer_info->page);
3708 rx_buffer_info->page = NULL;
3709 rx_buffer_info->page_offset = 0;
3710 }
3711
3712 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
3713 memset(rx_ring->rx_buffer_info, 0, size);
3714
3715 /* Zero out the descriptor ring */
3716 memset(rx_ring->desc, 0, rx_ring->size);
3717
3718 rx_ring->next_to_clean = 0;
3719 rx_ring->next_to_use = 0;
3720 }
3721
3722 /**
3723 * ixgbe_clean_tx_ring - Free Tx Buffers
3724 * @tx_ring: ring to be cleaned
3725 **/
3726 static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
3727 {
3728 struct ixgbe_tx_buffer *tx_buffer_info;
3729 unsigned long size;
3730 u16 i;
3731
3732 /* ring already cleared, nothing to do */
3733 if (!tx_ring->tx_buffer_info)
3734 return;
3735
3736 /* Free all the Tx ring sk_buffs */
3737 for (i = 0; i < tx_ring->count; i++) {
3738 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3739 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
3740 }
3741
3742 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
3743 memset(tx_ring->tx_buffer_info, 0, size);
3744
3745 /* Zero out the descriptor ring */
3746 memset(tx_ring->desc, 0, tx_ring->size);
3747
3748 tx_ring->next_to_use = 0;
3749 tx_ring->next_to_clean = 0;
3750 }
3751
3752 /**
3753 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
3754 * @adapter: board private structure
3755 **/
3756 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
3757 {
3758 int i;
3759
3760 for (i = 0; i < adapter->num_rx_queues; i++)
3761 ixgbe_clean_rx_ring(adapter->rx_ring[i]);
3762 }
3763
3764 /**
3765 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
3766 * @adapter: board private structure
3767 **/
3768 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
3769 {
3770 int i;
3771
3772 for (i = 0; i < adapter->num_tx_queues; i++)
3773 ixgbe_clean_tx_ring(adapter->tx_ring[i]);
3774 }
3775
3776 void ixgbe_down(struct ixgbe_adapter *adapter)
3777 {
3778 struct net_device *netdev = adapter->netdev;
3779 struct ixgbe_hw *hw = &adapter->hw;
3780 u32 rxctrl;
3781 u32 txdctl;
3782 int i, j;
3783 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3784
3785 /* signal that we are down to the interrupt handler */
3786 set_bit(__IXGBE_DOWN, &adapter->state);
3787
3788 /* disable receive for all VFs and wait one second */
3789 if (adapter->num_vfs) {
3790 /* ping all the active vfs to let them know we are going down */
3791 ixgbe_ping_all_vfs(adapter);
3792
3793 /* Disable all VFTE/VFRE TX/RX */
3794 ixgbe_disable_tx_rx(adapter);
3795
3796 /* Mark all the VFs as inactive */
3797 for (i = 0 ; i < adapter->num_vfs; i++)
3798 adapter->vfinfo[i].clear_to_send = 0;
3799 }
3800
3801 /* disable receives */
3802 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3803 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3804
3805 IXGBE_WRITE_FLUSH(hw);
3806 msleep(10);
3807
3808 netif_tx_stop_all_queues(netdev);
3809
3810 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3811 del_timer_sync(&adapter->sfp_timer);
3812 del_timer_sync(&adapter->watchdog_timer);
3813 cancel_work_sync(&adapter->watchdog_task);
3814
3815 netif_carrier_off(netdev);
3816 netif_tx_disable(netdev);
3817
3818 ixgbe_irq_disable(adapter);
3819
3820 ixgbe_napi_disable_all(adapter);
3821
3822 /* Cleanup the affinity_hint CPU mask memory and callback */
3823 for (i = 0; i < num_q_vectors; i++) {
3824 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
3825 /* clear the affinity_mask in the IRQ descriptor */
3826 irq_set_affinity_hint(adapter->msix_entries[i]. vector, NULL);
3827 /* release the CPU mask memory */
3828 free_cpumask_var(q_vector->affinity_mask);
3829 }
3830
3831 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3832 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
3833 cancel_work_sync(&adapter->fdir_reinit_task);
3834
3835 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
3836 cancel_work_sync(&adapter->check_overtemp_task);
3837
3838 /* disable transmits in the hardware now that interrupts are off */
3839 for (i = 0; i < adapter->num_tx_queues; i++) {
3840 j = adapter->tx_ring[i]->reg_idx;
3841 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3842 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
3843 (txdctl & ~IXGBE_TXDCTL_ENABLE));
3844 }
3845 /* Disable the Tx DMA engine on 82599 */
3846 if (hw->mac.type == ixgbe_mac_82599EB)
3847 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
3848 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
3849 ~IXGBE_DMATXCTL_TE));
3850
3851 /* power down the optics */
3852 if (hw->phy.multispeed_fiber)
3853 hw->mac.ops.disable_tx_laser(hw);
3854
3855 /* clear n-tuple filters that are cached */
3856 ethtool_ntuple_flush(netdev);
3857
3858 if (!pci_channel_offline(adapter->pdev))
3859 ixgbe_reset(adapter);
3860 ixgbe_clean_all_tx_rings(adapter);
3861 ixgbe_clean_all_rx_rings(adapter);
3862
3863 #ifdef CONFIG_IXGBE_DCA
3864 /* since we reset the hardware DCA settings were cleared */
3865 ixgbe_setup_dca(adapter);
3866 #endif
3867 }
3868
3869 /**
3870 * ixgbe_poll - NAPI Rx polling callback
3871 * @napi: structure for representing this polling device
3872 * @budget: how many packets driver is allowed to clean
3873 *
3874 * This function is used for legacy and MSI, NAPI mode
3875 **/
3876 static int ixgbe_poll(struct napi_struct *napi, int budget)
3877 {
3878 struct ixgbe_q_vector *q_vector =
3879 container_of(napi, struct ixgbe_q_vector, napi);
3880 struct ixgbe_adapter *adapter = q_vector->adapter;
3881 int tx_clean_complete, work_done = 0;
3882
3883 #ifdef CONFIG_IXGBE_DCA
3884 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
3885 ixgbe_update_tx_dca(adapter, adapter->tx_ring[0]);
3886 ixgbe_update_rx_dca(adapter, adapter->rx_ring[0]);
3887 }
3888 #endif
3889
3890 tx_clean_complete = ixgbe_clean_tx_irq(q_vector, adapter->tx_ring[0]);
3891 ixgbe_clean_rx_irq(q_vector, adapter->rx_ring[0], &work_done, budget);
3892
3893 if (!tx_clean_complete)
3894 work_done = budget;
3895
3896 /* If budget not fully consumed, exit the polling mode */
3897 if (work_done < budget) {
3898 napi_complete(napi);
3899 if (adapter->rx_itr_setting & 1)
3900 ixgbe_set_itr(adapter);
3901 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3902 ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
3903 }
3904 return work_done;
3905 }
3906
3907 /**
3908 * ixgbe_tx_timeout - Respond to a Tx Hang
3909 * @netdev: network interface device structure
3910 **/
3911 static void ixgbe_tx_timeout(struct net_device *netdev)
3912 {
3913 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3914
3915 /* Do the reset outside of interrupt context */
3916 schedule_work(&adapter->reset_task);
3917 }
3918
3919 static void ixgbe_reset_task(struct work_struct *work)
3920 {
3921 struct ixgbe_adapter *adapter;
3922 adapter = container_of(work, struct ixgbe_adapter, reset_task);
3923
3924 /* If we're already down or resetting, just bail */
3925 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
3926 test_bit(__IXGBE_RESETTING, &adapter->state))
3927 return;
3928
3929 adapter->tx_timeout_count++;
3930
3931 ixgbe_dump(adapter);
3932 netdev_err(adapter->netdev, "Reset adapter\n");
3933 ixgbe_reinit_locked(adapter);
3934 }
3935
3936 #ifdef CONFIG_IXGBE_DCB
3937 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
3938 {
3939 bool ret = false;
3940 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_DCB];
3941
3942 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
3943 return ret;
3944
3945 f->mask = 0x7 << 3;
3946 adapter->num_rx_queues = f->indices;
3947 adapter->num_tx_queues = f->indices;
3948 ret = true;
3949
3950 return ret;
3951 }
3952 #endif
3953
3954 /**
3955 * ixgbe_set_rss_queues: Allocate queues for RSS
3956 * @adapter: board private structure to initialize
3957 *
3958 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
3959 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
3960 *
3961 **/
3962 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
3963 {
3964 bool ret = false;
3965 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
3966
3967 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3968 f->mask = 0xF;
3969 adapter->num_rx_queues = f->indices;
3970 adapter->num_tx_queues = f->indices;
3971 ret = true;
3972 } else {
3973 ret = false;
3974 }
3975
3976 return ret;
3977 }
3978
3979 /**
3980 * ixgbe_set_fdir_queues: Allocate queues for Flow Director
3981 * @adapter: board private structure to initialize
3982 *
3983 * Flow Director is an advanced Rx filter, attempting to get Rx flows back
3984 * to the original CPU that initiated the Tx session. This runs in addition
3985 * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
3986 * Rx load across CPUs using RSS.
3987 *
3988 **/
3989 static inline bool ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
3990 {
3991 bool ret = false;
3992 struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
3993
3994 f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
3995 f_fdir->mask = 0;
3996
3997 /* Flow Director must have RSS enabled */
3998 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3999 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
4000 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)))) {
4001 adapter->num_tx_queues = f_fdir->indices;
4002 adapter->num_rx_queues = f_fdir->indices;
4003 ret = true;
4004 } else {
4005 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4006 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4007 }
4008 return ret;
4009 }
4010
4011 #ifdef IXGBE_FCOE
4012 /**
4013 * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
4014 * @adapter: board private structure to initialize
4015 *
4016 * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
4017 * The ring feature mask is not used as a mask for FCoE, as it can take any 8
4018 * rx queues out of the max number of rx queues, instead, it is used as the
4019 * index of the first rx queue used by FCoE.
4020 *
4021 **/
4022 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
4023 {
4024 bool ret = false;
4025 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4026
4027 f->indices = min((int)num_online_cpus(), f->indices);
4028 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
4029 adapter->num_rx_queues = 1;
4030 adapter->num_tx_queues = 1;
4031 #ifdef CONFIG_IXGBE_DCB
4032 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4033 e_info(probe, "FCoE enabled with DCB\n");
4034 ixgbe_set_dcb_queues(adapter);
4035 }
4036 #endif
4037 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4038 e_info(probe, "FCoE enabled with RSS\n");
4039 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4040 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
4041 ixgbe_set_fdir_queues(adapter);
4042 else
4043 ixgbe_set_rss_queues(adapter);
4044 }
4045 /* adding FCoE rx rings to the end */
4046 f->mask = adapter->num_rx_queues;
4047 adapter->num_rx_queues += f->indices;
4048 adapter->num_tx_queues += f->indices;
4049
4050 ret = true;
4051 }
4052
4053 return ret;
4054 }
4055
4056 #endif /* IXGBE_FCOE */
4057 /**
4058 * ixgbe_set_sriov_queues: Allocate queues for IOV use
4059 * @adapter: board private structure to initialize
4060 *
4061 * IOV doesn't actually use anything, so just NAK the
4062 * request for now and let the other queue routines
4063 * figure out what to do.
4064 */
4065 static inline bool ixgbe_set_sriov_queues(struct ixgbe_adapter *adapter)
4066 {
4067 return false;
4068 }
4069
4070 /*
4071 * ixgbe_set_num_queues: Allocate queues for device, feature dependant
4072 * @adapter: board private structure to initialize
4073 *
4074 * This is the top level queue allocation routine. The order here is very
4075 * important, starting with the "most" number of features turned on at once,
4076 * and ending with the smallest set of features. This way large combinations
4077 * can be allocated if they're turned on, and smaller combinations are the
4078 * fallthrough conditions.
4079 *
4080 **/
4081 static int ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
4082 {
4083 /* Start with base case */
4084 adapter->num_rx_queues = 1;
4085 adapter->num_tx_queues = 1;
4086 adapter->num_rx_pools = adapter->num_rx_queues;
4087 adapter->num_rx_queues_per_pool = 1;
4088
4089 if (ixgbe_set_sriov_queues(adapter))
4090 goto done;
4091
4092 #ifdef IXGBE_FCOE
4093 if (ixgbe_set_fcoe_queues(adapter))
4094 goto done;
4095
4096 #endif /* IXGBE_FCOE */
4097 #ifdef CONFIG_IXGBE_DCB
4098 if (ixgbe_set_dcb_queues(adapter))
4099 goto done;
4100
4101 #endif
4102 if (ixgbe_set_fdir_queues(adapter))
4103 goto done;
4104
4105 if (ixgbe_set_rss_queues(adapter))
4106 goto done;
4107
4108 /* fallback to base case */
4109 adapter->num_rx_queues = 1;
4110 adapter->num_tx_queues = 1;
4111
4112 done:
4113 /* Notify the stack of the (possibly) reduced queue counts. */
4114 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
4115 return netif_set_real_num_rx_queues(adapter->netdev,
4116 adapter->num_rx_queues);
4117 }
4118
4119 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
4120 int vectors)
4121 {
4122 int err, vector_threshold;
4123
4124 /* We'll want at least 3 (vector_threshold):
4125 * 1) TxQ[0] Cleanup
4126 * 2) RxQ[0] Cleanup
4127 * 3) Other (Link Status Change, etc.)
4128 * 4) TCP Timer (optional)
4129 */
4130 vector_threshold = MIN_MSIX_COUNT;
4131
4132 /* The more we get, the more we will assign to Tx/Rx Cleanup
4133 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
4134 * Right now, we simply care about how many we'll get; we'll
4135 * set them up later while requesting irq's.
4136 */
4137 while (vectors >= vector_threshold) {
4138 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
4139 vectors);
4140 if (!err) /* Success in acquiring all requested vectors. */
4141 break;
4142 else if (err < 0)
4143 vectors = 0; /* Nasty failure, quit now */
4144 else /* err == number of vectors we should try again with */
4145 vectors = err;
4146 }
4147
4148 if (vectors < vector_threshold) {
4149 /* Can't allocate enough MSI-X interrupts? Oh well.
4150 * This just means we'll go with either a single MSI
4151 * vector or fall back to legacy interrupts.
4152 */
4153 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4154 "Unable to allocate MSI-X interrupts\n");
4155 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4156 kfree(adapter->msix_entries);
4157 adapter->msix_entries = NULL;
4158 } else {
4159 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
4160 /*
4161 * Adjust for only the vectors we'll use, which is minimum
4162 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
4163 * vectors we were allocated.
4164 */
4165 adapter->num_msix_vectors = min(vectors,
4166 adapter->max_msix_q_vectors + NON_Q_VECTORS);
4167 }
4168 }
4169
4170 /**
4171 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
4172 * @adapter: board private structure to initialize
4173 *
4174 * Cache the descriptor ring offsets for RSS to the assigned rings.
4175 *
4176 **/
4177 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
4178 {
4179 int i;
4180 bool ret = false;
4181
4182 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4183 for (i = 0; i < adapter->num_rx_queues; i++)
4184 adapter->rx_ring[i]->reg_idx = i;
4185 for (i = 0; i < adapter->num_tx_queues; i++)
4186 adapter->tx_ring[i]->reg_idx = i;
4187 ret = true;
4188 } else {
4189 ret = false;
4190 }
4191
4192 return ret;
4193 }
4194
4195 #ifdef CONFIG_IXGBE_DCB
4196 /**
4197 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
4198 * @adapter: board private structure to initialize
4199 *
4200 * Cache the descriptor ring offsets for DCB to the assigned rings.
4201 *
4202 **/
4203 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
4204 {
4205 int i;
4206 bool ret = false;
4207 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
4208
4209 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4210 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
4211 /* the number of queues is assumed to be symmetric */
4212 for (i = 0; i < dcb_i; i++) {
4213 adapter->rx_ring[i]->reg_idx = i << 3;
4214 adapter->tx_ring[i]->reg_idx = i << 2;
4215 }
4216 ret = true;
4217 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
4218 if (dcb_i == 8) {
4219 /*
4220 * Tx TC0 starts at: descriptor queue 0
4221 * Tx TC1 starts at: descriptor queue 32
4222 * Tx TC2 starts at: descriptor queue 64
4223 * Tx TC3 starts at: descriptor queue 80
4224 * Tx TC4 starts at: descriptor queue 96
4225 * Tx TC5 starts at: descriptor queue 104
4226 * Tx TC6 starts at: descriptor queue 112
4227 * Tx TC7 starts at: descriptor queue 120
4228 *
4229 * Rx TC0-TC7 are offset by 16 queues each
4230 */
4231 for (i = 0; i < 3; i++) {
4232 adapter->tx_ring[i]->reg_idx = i << 5;
4233 adapter->rx_ring[i]->reg_idx = i << 4;
4234 }
4235 for ( ; i < 5; i++) {
4236 adapter->tx_ring[i]->reg_idx =
4237 ((i + 2) << 4);
4238 adapter->rx_ring[i]->reg_idx = i << 4;
4239 }
4240 for ( ; i < dcb_i; i++) {
4241 adapter->tx_ring[i]->reg_idx =
4242 ((i + 8) << 3);
4243 adapter->rx_ring[i]->reg_idx = i << 4;
4244 }
4245
4246 ret = true;
4247 } else if (dcb_i == 4) {
4248 /*
4249 * Tx TC0 starts at: descriptor queue 0
4250 * Tx TC1 starts at: descriptor queue 64
4251 * Tx TC2 starts at: descriptor queue 96
4252 * Tx TC3 starts at: descriptor queue 112
4253 *
4254 * Rx TC0-TC3 are offset by 32 queues each
4255 */
4256 adapter->tx_ring[0]->reg_idx = 0;
4257 adapter->tx_ring[1]->reg_idx = 64;
4258 adapter->tx_ring[2]->reg_idx = 96;
4259 adapter->tx_ring[3]->reg_idx = 112;
4260 for (i = 0 ; i < dcb_i; i++)
4261 adapter->rx_ring[i]->reg_idx = i << 5;
4262
4263 ret = true;
4264 } else {
4265 ret = false;
4266 }
4267 } else {
4268 ret = false;
4269 }
4270 } else {
4271 ret = false;
4272 }
4273
4274 return ret;
4275 }
4276 #endif
4277
4278 /**
4279 * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
4280 * @adapter: board private structure to initialize
4281 *
4282 * Cache the descriptor ring offsets for Flow Director to the assigned rings.
4283 *
4284 **/
4285 static inline bool ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
4286 {
4287 int i;
4288 bool ret = false;
4289
4290 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
4291 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4292 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))) {
4293 for (i = 0; i < adapter->num_rx_queues; i++)
4294 adapter->rx_ring[i]->reg_idx = i;
4295 for (i = 0; i < adapter->num_tx_queues; i++)
4296 adapter->tx_ring[i]->reg_idx = i;
4297 ret = true;
4298 }
4299
4300 return ret;
4301 }
4302
4303 #ifdef IXGBE_FCOE
4304 /**
4305 * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
4306 * @adapter: board private structure to initialize
4307 *
4308 * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
4309 *
4310 */
4311 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
4312 {
4313 int i, fcoe_rx_i = 0, fcoe_tx_i = 0;
4314 bool ret = false;
4315 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4316
4317 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
4318 #ifdef CONFIG_IXGBE_DCB
4319 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4320 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
4321
4322 ixgbe_cache_ring_dcb(adapter);
4323 /* find out queues in TC for FCoE */
4324 fcoe_rx_i = adapter->rx_ring[fcoe->tc]->reg_idx + 1;
4325 fcoe_tx_i = adapter->tx_ring[fcoe->tc]->reg_idx + 1;
4326 /*
4327 * In 82599, the number of Tx queues for each traffic
4328 * class for both 8-TC and 4-TC modes are:
4329 * TCs : TC0 TC1 TC2 TC3 TC4 TC5 TC6 TC7
4330 * 8 TCs: 32 32 16 16 8 8 8 8
4331 * 4 TCs: 64 64 32 32
4332 * We have max 8 queues for FCoE, where 8 the is
4333 * FCoE redirection table size. If TC for FCoE is
4334 * less than or equal to TC3, we have enough queues
4335 * to add max of 8 queues for FCoE, so we start FCoE
4336 * tx descriptor from the next one, i.e., reg_idx + 1.
4337 * If TC for FCoE is above TC3, implying 8 TC mode,
4338 * and we need 8 for FCoE, we have to take all queues
4339 * in that traffic class for FCoE.
4340 */
4341 if ((f->indices == IXGBE_FCRETA_SIZE) && (fcoe->tc > 3))
4342 fcoe_tx_i--;
4343 }
4344 #endif /* CONFIG_IXGBE_DCB */
4345 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4346 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4347 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
4348 ixgbe_cache_ring_fdir(adapter);
4349 else
4350 ixgbe_cache_ring_rss(adapter);
4351
4352 fcoe_rx_i = f->mask;
4353 fcoe_tx_i = f->mask;
4354 }
4355 for (i = 0; i < f->indices; i++, fcoe_rx_i++, fcoe_tx_i++) {
4356 adapter->rx_ring[f->mask + i]->reg_idx = fcoe_rx_i;
4357 adapter->tx_ring[f->mask + i]->reg_idx = fcoe_tx_i;
4358 }
4359 ret = true;
4360 }
4361 return ret;
4362 }
4363
4364 #endif /* IXGBE_FCOE */
4365 /**
4366 * ixgbe_cache_ring_sriov - Descriptor ring to register mapping for sriov
4367 * @adapter: board private structure to initialize
4368 *
4369 * SR-IOV doesn't use any descriptor rings but changes the default if
4370 * no other mapping is used.
4371 *
4372 */
4373 static inline bool ixgbe_cache_ring_sriov(struct ixgbe_adapter *adapter)
4374 {
4375 adapter->rx_ring[0]->reg_idx = adapter->num_vfs * 2;
4376 adapter->tx_ring[0]->reg_idx = adapter->num_vfs * 2;
4377 if (adapter->num_vfs)
4378 return true;
4379 else
4380 return false;
4381 }
4382
4383 /**
4384 * ixgbe_cache_ring_register - Descriptor ring to register mapping
4385 * @adapter: board private structure to initialize
4386 *
4387 * Once we know the feature-set enabled for the device, we'll cache
4388 * the register offset the descriptor ring is assigned to.
4389 *
4390 * Note, the order the various feature calls is important. It must start with
4391 * the "most" features enabled at the same time, then trickle down to the
4392 * least amount of features turned on at once.
4393 **/
4394 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
4395 {
4396 /* start with default case */
4397 adapter->rx_ring[0]->reg_idx = 0;
4398 adapter->tx_ring[0]->reg_idx = 0;
4399
4400 if (ixgbe_cache_ring_sriov(adapter))
4401 return;
4402
4403 #ifdef IXGBE_FCOE
4404 if (ixgbe_cache_ring_fcoe(adapter))
4405 return;
4406
4407 #endif /* IXGBE_FCOE */
4408 #ifdef CONFIG_IXGBE_DCB
4409 if (ixgbe_cache_ring_dcb(adapter))
4410 return;
4411
4412 #endif
4413 if (ixgbe_cache_ring_fdir(adapter))
4414 return;
4415
4416 if (ixgbe_cache_ring_rss(adapter))
4417 return;
4418 }
4419
4420 /**
4421 * ixgbe_alloc_queues - Allocate memory for all rings
4422 * @adapter: board private structure to initialize
4423 *
4424 * We allocate one ring per queue at run-time since we don't know the
4425 * number of queues at compile-time. The polling_netdev array is
4426 * intended for Multiqueue, but should work fine with a single queue.
4427 **/
4428 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
4429 {
4430 int i;
4431 int rx_count;
4432 int orig_node = adapter->node;
4433
4434 for (i = 0; i < adapter->num_tx_queues; i++) {
4435 struct ixgbe_ring *ring = adapter->tx_ring[i];
4436 if (orig_node == -1) {
4437 int cur_node = next_online_node(adapter->node);
4438 if (cur_node == MAX_NUMNODES)
4439 cur_node = first_online_node;
4440 adapter->node = cur_node;
4441 }
4442 ring = kzalloc_node(sizeof(struct ixgbe_ring), GFP_KERNEL,
4443 adapter->node);
4444 if (!ring)
4445 ring = kzalloc(sizeof(struct ixgbe_ring), GFP_KERNEL);
4446 if (!ring)
4447 goto err_tx_ring_allocation;
4448 ring->count = adapter->tx_ring_count;
4449 ring->queue_index = i;
4450 ring->dev = &adapter->pdev->dev;
4451 ring->netdev = adapter->netdev;
4452 ring->numa_node = adapter->node;
4453
4454 adapter->tx_ring[i] = ring;
4455 }
4456
4457 /* Restore the adapter's original node */
4458 adapter->node = orig_node;
4459
4460 rx_count = adapter->rx_ring_count;
4461 for (i = 0; i < adapter->num_rx_queues; i++) {
4462 struct ixgbe_ring *ring = adapter->rx_ring[i];
4463 if (orig_node == -1) {
4464 int cur_node = next_online_node(adapter->node);
4465 if (cur_node == MAX_NUMNODES)
4466 cur_node = first_online_node;
4467 adapter->node = cur_node;
4468 }
4469 ring = kzalloc_node(sizeof(struct ixgbe_ring), GFP_KERNEL,
4470 adapter->node);
4471 if (!ring)
4472 ring = kzalloc(sizeof(struct ixgbe_ring), GFP_KERNEL);
4473 if (!ring)
4474 goto err_rx_ring_allocation;
4475 ring->count = rx_count;
4476 ring->queue_index = i;
4477 ring->dev = &adapter->pdev->dev;
4478 ring->netdev = adapter->netdev;
4479 ring->numa_node = adapter->node;
4480
4481 adapter->rx_ring[i] = ring;
4482 }
4483
4484 /* Restore the adapter's original node */
4485 adapter->node = orig_node;
4486
4487 ixgbe_cache_ring_register(adapter);
4488
4489 return 0;
4490
4491 err_rx_ring_allocation:
4492 for (i = 0; i < adapter->num_tx_queues; i++)
4493 kfree(adapter->tx_ring[i]);
4494 err_tx_ring_allocation:
4495 return -ENOMEM;
4496 }
4497
4498 /**
4499 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
4500 * @adapter: board private structure to initialize
4501 *
4502 * Attempt to configure the interrupts using the best available
4503 * capabilities of the hardware and the kernel.
4504 **/
4505 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
4506 {
4507 struct ixgbe_hw *hw = &adapter->hw;
4508 int err = 0;
4509 int vector, v_budget;
4510
4511 /*
4512 * It's easy to be greedy for MSI-X vectors, but it really
4513 * doesn't do us much good if we have a lot more vectors
4514 * than CPU's. So let's be conservative and only ask for
4515 * (roughly) the same number of vectors as there are CPU's.
4516 */
4517 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
4518 (int)num_online_cpus()) + NON_Q_VECTORS;
4519
4520 /*
4521 * At the same time, hardware can only support a maximum of
4522 * hw.mac->max_msix_vectors vectors. With features
4523 * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
4524 * descriptor queues supported by our device. Thus, we cap it off in
4525 * those rare cases where the cpu count also exceeds our vector limit.
4526 */
4527 v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
4528
4529 /* A failure in MSI-X entry allocation isn't fatal, but it does
4530 * mean we disable MSI-X capabilities of the adapter. */
4531 adapter->msix_entries = kcalloc(v_budget,
4532 sizeof(struct msix_entry), GFP_KERNEL);
4533 if (adapter->msix_entries) {
4534 for (vector = 0; vector < v_budget; vector++)
4535 adapter->msix_entries[vector].entry = vector;
4536
4537 ixgbe_acquire_msix_vectors(adapter, v_budget);
4538
4539 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4540 goto out;
4541 }
4542
4543 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
4544 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
4545 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4546 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4547 adapter->atr_sample_rate = 0;
4548 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4549 ixgbe_disable_sriov(adapter);
4550
4551 err = ixgbe_set_num_queues(adapter);
4552 if (err)
4553 return err;
4554
4555 err = pci_enable_msi(adapter->pdev);
4556 if (!err) {
4557 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
4558 } else {
4559 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4560 "Unable to allocate MSI interrupt, "
4561 "falling back to legacy. Error: %d\n", err);
4562 /* reset err */
4563 err = 0;
4564 }
4565
4566 out:
4567 return err;
4568 }
4569
4570 /**
4571 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
4572 * @adapter: board private structure to initialize
4573 *
4574 * We allocate one q_vector per queue interrupt. If allocation fails we
4575 * return -ENOMEM.
4576 **/
4577 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
4578 {
4579 int q_idx, num_q_vectors;
4580 struct ixgbe_q_vector *q_vector;
4581 int napi_vectors;
4582 int (*poll)(struct napi_struct *, int);
4583
4584 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4585 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4586 napi_vectors = adapter->num_rx_queues;
4587 poll = &ixgbe_clean_rxtx_many;
4588 } else {
4589 num_q_vectors = 1;
4590 napi_vectors = 1;
4591 poll = &ixgbe_poll;
4592 }
4593
4594 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4595 q_vector = kzalloc_node(sizeof(struct ixgbe_q_vector),
4596 GFP_KERNEL, adapter->node);
4597 if (!q_vector)
4598 q_vector = kzalloc(sizeof(struct ixgbe_q_vector),
4599 GFP_KERNEL);
4600 if (!q_vector)
4601 goto err_out;
4602 q_vector->adapter = adapter;
4603 if (q_vector->txr_count && !q_vector->rxr_count)
4604 q_vector->eitr = adapter->tx_eitr_param;
4605 else
4606 q_vector->eitr = adapter->rx_eitr_param;
4607 q_vector->v_idx = q_idx;
4608 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
4609 adapter->q_vector[q_idx] = q_vector;
4610 }
4611
4612 return 0;
4613
4614 err_out:
4615 while (q_idx) {
4616 q_idx--;
4617 q_vector = adapter->q_vector[q_idx];
4618 netif_napi_del(&q_vector->napi);
4619 kfree(q_vector);
4620 adapter->q_vector[q_idx] = NULL;
4621 }
4622 return -ENOMEM;
4623 }
4624
4625 /**
4626 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
4627 * @adapter: board private structure to initialize
4628 *
4629 * This function frees the memory allocated to the q_vectors. In addition if
4630 * NAPI is enabled it will delete any references to the NAPI struct prior
4631 * to freeing the q_vector.
4632 **/
4633 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
4634 {
4635 int q_idx, num_q_vectors;
4636
4637 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4638 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4639 else
4640 num_q_vectors = 1;
4641
4642 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4643 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
4644 adapter->q_vector[q_idx] = NULL;
4645 netif_napi_del(&q_vector->napi);
4646 kfree(q_vector);
4647 }
4648 }
4649
4650 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
4651 {
4652 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4653 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4654 pci_disable_msix(adapter->pdev);
4655 kfree(adapter->msix_entries);
4656 adapter->msix_entries = NULL;
4657 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
4658 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
4659 pci_disable_msi(adapter->pdev);
4660 }
4661 }
4662
4663 /**
4664 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
4665 * @adapter: board private structure to initialize
4666 *
4667 * We determine which interrupt scheme to use based on...
4668 * - Kernel support (MSI, MSI-X)
4669 * - which can be user-defined (via MODULE_PARAM)
4670 * - Hardware queue count (num_*_queues)
4671 * - defined by miscellaneous hardware support/features (RSS, etc.)
4672 **/
4673 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
4674 {
4675 int err;
4676
4677 /* Number of supported queues */
4678 err = ixgbe_set_num_queues(adapter);
4679 if (err)
4680 return err;
4681
4682 err = ixgbe_set_interrupt_capability(adapter);
4683 if (err) {
4684 e_dev_err("Unable to setup interrupt capabilities\n");
4685 goto err_set_interrupt;
4686 }
4687
4688 err = ixgbe_alloc_q_vectors(adapter);
4689 if (err) {
4690 e_dev_err("Unable to allocate memory for queue vectors\n");
4691 goto err_alloc_q_vectors;
4692 }
4693
4694 err = ixgbe_alloc_queues(adapter);
4695 if (err) {
4696 e_dev_err("Unable to allocate memory for queues\n");
4697 goto err_alloc_queues;
4698 }
4699
4700 e_dev_info("Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u\n",
4701 (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
4702 adapter->num_rx_queues, adapter->num_tx_queues);
4703
4704 set_bit(__IXGBE_DOWN, &adapter->state);
4705
4706 return 0;
4707
4708 err_alloc_queues:
4709 ixgbe_free_q_vectors(adapter);
4710 err_alloc_q_vectors:
4711 ixgbe_reset_interrupt_capability(adapter);
4712 err_set_interrupt:
4713 return err;
4714 }
4715
4716 static void ring_free_rcu(struct rcu_head *head)
4717 {
4718 kfree(container_of(head, struct ixgbe_ring, rcu));
4719 }
4720
4721 /**
4722 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
4723 * @adapter: board private structure to clear interrupt scheme on
4724 *
4725 * We go through and clear interrupt specific resources and reset the structure
4726 * to pre-load conditions
4727 **/
4728 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
4729 {
4730 int i;
4731
4732 for (i = 0; i < adapter->num_tx_queues; i++) {
4733 kfree(adapter->tx_ring[i]);
4734 adapter->tx_ring[i] = NULL;
4735 }
4736 for (i = 0; i < adapter->num_rx_queues; i++) {
4737 struct ixgbe_ring *ring = adapter->rx_ring[i];
4738
4739 /* ixgbe_get_stats64() might access this ring, we must wait
4740 * a grace period before freeing it.
4741 */
4742 call_rcu(&ring->rcu, ring_free_rcu);
4743 adapter->rx_ring[i] = NULL;
4744 }
4745
4746 ixgbe_free_q_vectors(adapter);
4747 ixgbe_reset_interrupt_capability(adapter);
4748 }
4749
4750 /**
4751 * ixgbe_sfp_timer - worker thread to find a missing module
4752 * @data: pointer to our adapter struct
4753 **/
4754 static void ixgbe_sfp_timer(unsigned long data)
4755 {
4756 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4757
4758 /*
4759 * Do the sfp_timer outside of interrupt context due to the
4760 * delays that sfp+ detection requires
4761 */
4762 schedule_work(&adapter->sfp_task);
4763 }
4764
4765 /**
4766 * ixgbe_sfp_task - worker thread to find a missing module
4767 * @work: pointer to work_struct containing our data
4768 **/
4769 static void ixgbe_sfp_task(struct work_struct *work)
4770 {
4771 struct ixgbe_adapter *adapter = container_of(work,
4772 struct ixgbe_adapter,
4773 sfp_task);
4774 struct ixgbe_hw *hw = &adapter->hw;
4775
4776 if ((hw->phy.type == ixgbe_phy_nl) &&
4777 (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
4778 s32 ret = hw->phy.ops.identify_sfp(hw);
4779 if (ret == IXGBE_ERR_SFP_NOT_PRESENT)
4780 goto reschedule;
4781 ret = hw->phy.ops.reset(hw);
4782 if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
4783 e_dev_err("failed to initialize because an unsupported "
4784 "SFP+ module type was detected.\n");
4785 e_dev_err("Reload the driver after installing a "
4786 "supported module.\n");
4787 unregister_netdev(adapter->netdev);
4788 } else {
4789 e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
4790 }
4791 /* don't need this routine any more */
4792 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
4793 }
4794 return;
4795 reschedule:
4796 if (test_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state))
4797 mod_timer(&adapter->sfp_timer,
4798 round_jiffies(jiffies + (2 * HZ)));
4799 }
4800
4801 /**
4802 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
4803 * @adapter: board private structure to initialize
4804 *
4805 * ixgbe_sw_init initializes the Adapter private data structure.
4806 * Fields are initialized based on PCI device information and
4807 * OS network device settings (MTU size).
4808 **/
4809 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
4810 {
4811 struct ixgbe_hw *hw = &adapter->hw;
4812 struct pci_dev *pdev = adapter->pdev;
4813 struct net_device *dev = adapter->netdev;
4814 unsigned int rss;
4815 #ifdef CONFIG_IXGBE_DCB
4816 int j;
4817 struct tc_configuration *tc;
4818 #endif
4819 int max_frame = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
4820
4821 /* PCI config space info */
4822
4823 hw->vendor_id = pdev->vendor;
4824 hw->device_id = pdev->device;
4825 hw->revision_id = pdev->revision;
4826 hw->subsystem_vendor_id = pdev->subsystem_vendor;
4827 hw->subsystem_device_id = pdev->subsystem_device;
4828
4829 /* Set capability flags */
4830 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
4831 adapter->ring_feature[RING_F_RSS].indices = rss;
4832 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
4833 adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
4834 if (hw->mac.type == ixgbe_mac_82598EB) {
4835 if (hw->device_id == IXGBE_DEV_ID_82598AT)
4836 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
4837 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
4838 } else if (hw->mac.type == ixgbe_mac_82599EB) {
4839 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
4840 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
4841 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
4842 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
4843 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
4844 if (dev->features & NETIF_F_NTUPLE) {
4845 /* Flow Director perfect filter enabled */
4846 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4847 adapter->atr_sample_rate = 0;
4848 spin_lock_init(&adapter->fdir_perfect_lock);
4849 } else {
4850 /* Flow Director hash filters enabled */
4851 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
4852 adapter->atr_sample_rate = 20;
4853 }
4854 adapter->ring_feature[RING_F_FDIR].indices =
4855 IXGBE_MAX_FDIR_INDICES;
4856 adapter->fdir_pballoc = 0;
4857 #ifdef IXGBE_FCOE
4858 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
4859 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
4860 adapter->ring_feature[RING_F_FCOE].indices = 0;
4861 #ifdef CONFIG_IXGBE_DCB
4862 /* Default traffic class to use for FCoE */
4863 adapter->fcoe.tc = IXGBE_FCOE_DEFTC;
4864 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
4865 #endif
4866 #endif /* IXGBE_FCOE */
4867 }
4868
4869 #ifdef CONFIG_IXGBE_DCB
4870 /* Configure DCB traffic classes */
4871 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
4872 tc = &adapter->dcb_cfg.tc_config[j];
4873 tc->path[DCB_TX_CONFIG].bwg_id = 0;
4874 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
4875 tc->path[DCB_RX_CONFIG].bwg_id = 0;
4876 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
4877 tc->dcb_pfc = pfc_disabled;
4878 }
4879 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
4880 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
4881 adapter->dcb_cfg.rx_pba_cfg = pba_equal;
4882 adapter->dcb_cfg.pfc_mode_enable = false;
4883 adapter->dcb_cfg.round_robin_enable = false;
4884 adapter->dcb_set_bitmap = 0x00;
4885 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
4886 adapter->ring_feature[RING_F_DCB].indices);
4887
4888 #endif
4889
4890 /* default flow control settings */
4891 hw->fc.requested_mode = ixgbe_fc_full;
4892 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
4893 #ifdef CONFIG_DCB
4894 adapter->last_lfc_mode = hw->fc.current_mode;
4895 #endif
4896 hw->fc.high_water = FC_HIGH_WATER(max_frame);
4897 hw->fc.low_water = FC_LOW_WATER(max_frame);
4898 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
4899 hw->fc.send_xon = true;
4900 hw->fc.disable_fc_autoneg = false;
4901
4902 /* enable itr by default in dynamic mode */
4903 adapter->rx_itr_setting = 1;
4904 adapter->rx_eitr_param = 20000;
4905 adapter->tx_itr_setting = 1;
4906 adapter->tx_eitr_param = 10000;
4907
4908 /* set defaults for eitr in MegaBytes */
4909 adapter->eitr_low = 10;
4910 adapter->eitr_high = 20;
4911
4912 /* set default ring sizes */
4913 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
4914 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
4915
4916 /* initialize eeprom parameters */
4917 if (ixgbe_init_eeprom_params_generic(hw)) {
4918 e_dev_err("EEPROM initialization failed\n");
4919 return -EIO;
4920 }
4921
4922 /* enable rx csum by default */
4923 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
4924
4925 /* get assigned NUMA node */
4926 adapter->node = dev_to_node(&pdev->dev);
4927
4928 set_bit(__IXGBE_DOWN, &adapter->state);
4929
4930 return 0;
4931 }
4932
4933 /**
4934 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
4935 * @tx_ring: tx descriptor ring (for a specific queue) to setup
4936 *
4937 * Return 0 on success, negative on failure
4938 **/
4939 int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
4940 {
4941 struct device *dev = tx_ring->dev;
4942 int size;
4943
4944 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
4945 tx_ring->tx_buffer_info = vmalloc_node(size, tx_ring->numa_node);
4946 if (!tx_ring->tx_buffer_info)
4947 tx_ring->tx_buffer_info = vmalloc(size);
4948 if (!tx_ring->tx_buffer_info)
4949 goto err;
4950 memset(tx_ring->tx_buffer_info, 0, size);
4951
4952 /* round up to nearest 4K */
4953 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
4954 tx_ring->size = ALIGN(tx_ring->size, 4096);
4955
4956 tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
4957 &tx_ring->dma, GFP_KERNEL);
4958 if (!tx_ring->desc)
4959 goto err;
4960
4961 tx_ring->next_to_use = 0;
4962 tx_ring->next_to_clean = 0;
4963 tx_ring->work_limit = tx_ring->count;
4964 return 0;
4965
4966 err:
4967 vfree(tx_ring->tx_buffer_info);
4968 tx_ring->tx_buffer_info = NULL;
4969 dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n");
4970 return -ENOMEM;
4971 }
4972
4973 /**
4974 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
4975 * @adapter: board private structure
4976 *
4977 * If this function returns with an error, then it's possible one or
4978 * more of the rings is populated (while the rest are not). It is the
4979 * callers duty to clean those orphaned rings.
4980 *
4981 * Return 0 on success, negative on failure
4982 **/
4983 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
4984 {
4985 int i, err = 0;
4986
4987 for (i = 0; i < adapter->num_tx_queues; i++) {
4988 err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
4989 if (!err)
4990 continue;
4991 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
4992 break;
4993 }
4994
4995 return err;
4996 }
4997
4998 /**
4999 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
5000 * @rx_ring: rx descriptor ring (for a specific queue) to setup
5001 *
5002 * Returns 0 on success, negative on failure
5003 **/
5004 int ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring)
5005 {
5006 struct device *dev = rx_ring->dev;
5007 int size;
5008
5009 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
5010 rx_ring->rx_buffer_info = vmalloc_node(size, rx_ring->numa_node);
5011 if (!rx_ring->rx_buffer_info)
5012 rx_ring->rx_buffer_info = vmalloc(size);
5013 if (!rx_ring->rx_buffer_info)
5014 goto err;
5015 memset(rx_ring->rx_buffer_info, 0, size);
5016
5017 /* Round up to nearest 4K */
5018 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
5019 rx_ring->size = ALIGN(rx_ring->size, 4096);
5020
5021 rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
5022 &rx_ring->dma, GFP_KERNEL);
5023
5024 if (!rx_ring->desc)
5025 goto err;
5026
5027 rx_ring->next_to_clean = 0;
5028 rx_ring->next_to_use = 0;
5029
5030 return 0;
5031 err:
5032 vfree(rx_ring->rx_buffer_info);
5033 rx_ring->rx_buffer_info = NULL;
5034 dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");
5035 return -ENOMEM;
5036 }
5037
5038 /**
5039 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
5040 * @adapter: board private structure
5041 *
5042 * If this function returns with an error, then it's possible one or
5043 * more of the rings is populated (while the rest are not). It is the
5044 * callers duty to clean those orphaned rings.
5045 *
5046 * Return 0 on success, negative on failure
5047 **/
5048 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
5049 {
5050 int i, err = 0;
5051
5052 for (i = 0; i < adapter->num_rx_queues; i++) {
5053 err = ixgbe_setup_rx_resources(adapter->rx_ring[i]);
5054 if (!err)
5055 continue;
5056 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
5057 break;
5058 }
5059
5060 return err;
5061 }
5062
5063 /**
5064 * ixgbe_free_tx_resources - Free Tx Resources per Queue
5065 * @tx_ring: Tx descriptor ring for a specific queue
5066 *
5067 * Free all transmit software resources
5068 **/
5069 void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring)
5070 {
5071 ixgbe_clean_tx_ring(tx_ring);
5072
5073 vfree(tx_ring->tx_buffer_info);
5074 tx_ring->tx_buffer_info = NULL;
5075
5076 /* if not set, then don't free */
5077 if (!tx_ring->desc)
5078 return;
5079
5080 dma_free_coherent(tx_ring->dev, tx_ring->size,
5081 tx_ring->desc, tx_ring->dma);
5082
5083 tx_ring->desc = NULL;
5084 }
5085
5086 /**
5087 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
5088 * @adapter: board private structure
5089 *
5090 * Free all transmit software resources
5091 **/
5092 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
5093 {
5094 int i;
5095
5096 for (i = 0; i < adapter->num_tx_queues; i++)
5097 if (adapter->tx_ring[i]->desc)
5098 ixgbe_free_tx_resources(adapter->tx_ring[i]);
5099 }
5100
5101 /**
5102 * ixgbe_free_rx_resources - Free Rx Resources
5103 * @rx_ring: ring to clean the resources from
5104 *
5105 * Free all receive software resources
5106 **/
5107 void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring)
5108 {
5109 ixgbe_clean_rx_ring(rx_ring);
5110
5111 vfree(rx_ring->rx_buffer_info);
5112 rx_ring->rx_buffer_info = NULL;
5113
5114 /* if not set, then don't free */
5115 if (!rx_ring->desc)
5116 return;
5117
5118 dma_free_coherent(rx_ring->dev, rx_ring->size,
5119 rx_ring->desc, rx_ring->dma);
5120
5121 rx_ring->desc = NULL;
5122 }
5123
5124 /**
5125 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
5126 * @adapter: board private structure
5127 *
5128 * Free all receive software resources
5129 **/
5130 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
5131 {
5132 int i;
5133
5134 for (i = 0; i < adapter->num_rx_queues; i++)
5135 if (adapter->rx_ring[i]->desc)
5136 ixgbe_free_rx_resources(adapter->rx_ring[i]);
5137 }
5138
5139 /**
5140 * ixgbe_change_mtu - Change the Maximum Transfer Unit
5141 * @netdev: network interface device structure
5142 * @new_mtu: new value for maximum frame size
5143 *
5144 * Returns 0 on success, negative on failure
5145 **/
5146 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
5147 {
5148 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5149 struct ixgbe_hw *hw = &adapter->hw;
5150 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5151
5152 /* MTU < 68 is an error and causes problems on some kernels */
5153 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
5154 return -EINVAL;
5155
5156 e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5157 /* must set new MTU before calling down or up */
5158 netdev->mtu = new_mtu;
5159
5160 hw->fc.high_water = FC_HIGH_WATER(max_frame);
5161 hw->fc.low_water = FC_LOW_WATER(max_frame);
5162
5163 if (netif_running(netdev))
5164 ixgbe_reinit_locked(adapter);
5165
5166 return 0;
5167 }
5168
5169 /**
5170 * ixgbe_open - Called when a network interface is made active
5171 * @netdev: network interface device structure
5172 *
5173 * Returns 0 on success, negative value on failure
5174 *
5175 * The open entry point is called when a network interface is made
5176 * active by the system (IFF_UP). At this point all resources needed
5177 * for transmit and receive operations are allocated, the interrupt
5178 * handler is registered with the OS, the watchdog timer is started,
5179 * and the stack is notified that the interface is ready.
5180 **/
5181 static int ixgbe_open(struct net_device *netdev)
5182 {
5183 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5184 int err;
5185
5186 /* disallow open during test */
5187 if (test_bit(__IXGBE_TESTING, &adapter->state))
5188 return -EBUSY;
5189
5190 netif_carrier_off(netdev);
5191
5192 /* allocate transmit descriptors */
5193 err = ixgbe_setup_all_tx_resources(adapter);
5194 if (err)
5195 goto err_setup_tx;
5196
5197 /* allocate receive descriptors */
5198 err = ixgbe_setup_all_rx_resources(adapter);
5199 if (err)
5200 goto err_setup_rx;
5201
5202 ixgbe_configure(adapter);
5203
5204 err = ixgbe_request_irq(adapter);
5205 if (err)
5206 goto err_req_irq;
5207
5208 err = ixgbe_up_complete(adapter);
5209 if (err)
5210 goto err_up;
5211
5212 netif_tx_start_all_queues(netdev);
5213
5214 return 0;
5215
5216 err_up:
5217 ixgbe_release_hw_control(adapter);
5218 ixgbe_free_irq(adapter);
5219 err_req_irq:
5220 err_setup_rx:
5221 ixgbe_free_all_rx_resources(adapter);
5222 err_setup_tx:
5223 ixgbe_free_all_tx_resources(adapter);
5224 ixgbe_reset(adapter);
5225
5226 return err;
5227 }
5228
5229 /**
5230 * ixgbe_close - Disables a network interface
5231 * @netdev: network interface device structure
5232 *
5233 * Returns 0, this is not allowed to fail
5234 *
5235 * The close entry point is called when an interface is de-activated
5236 * by the OS. The hardware is still under the drivers control, but
5237 * needs to be disabled. A global MAC reset is issued to stop the
5238 * hardware, and all transmit and receive resources are freed.
5239 **/
5240 static int ixgbe_close(struct net_device *netdev)
5241 {
5242 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5243
5244 ixgbe_down(adapter);
5245 ixgbe_free_irq(adapter);
5246
5247 ixgbe_free_all_tx_resources(adapter);
5248 ixgbe_free_all_rx_resources(adapter);
5249
5250 ixgbe_release_hw_control(adapter);
5251
5252 return 0;
5253 }
5254
5255 #ifdef CONFIG_PM
5256 static int ixgbe_resume(struct pci_dev *pdev)
5257 {
5258 struct net_device *netdev = pci_get_drvdata(pdev);
5259 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5260 u32 err;
5261
5262 pci_set_power_state(pdev, PCI_D0);
5263 pci_restore_state(pdev);
5264 /*
5265 * pci_restore_state clears dev->state_saved so call
5266 * pci_save_state to restore it.
5267 */
5268 pci_save_state(pdev);
5269
5270 err = pci_enable_device_mem(pdev);
5271 if (err) {
5272 e_dev_err("Cannot enable PCI device from suspend\n");
5273 return err;
5274 }
5275 pci_set_master(pdev);
5276
5277 pci_wake_from_d3(pdev, false);
5278
5279 err = ixgbe_init_interrupt_scheme(adapter);
5280 if (err) {
5281 e_dev_err("Cannot initialize interrupts for device\n");
5282 return err;
5283 }
5284
5285 ixgbe_reset(adapter);
5286
5287 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5288
5289 if (netif_running(netdev)) {
5290 err = ixgbe_open(adapter->netdev);
5291 if (err)
5292 return err;
5293 }
5294
5295 netif_device_attach(netdev);
5296
5297 return 0;
5298 }
5299 #endif /* CONFIG_PM */
5300
5301 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
5302 {
5303 struct net_device *netdev = pci_get_drvdata(pdev);
5304 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5305 struct ixgbe_hw *hw = &adapter->hw;
5306 u32 ctrl, fctrl;
5307 u32 wufc = adapter->wol;
5308 #ifdef CONFIG_PM
5309 int retval = 0;
5310 #endif
5311
5312 netif_device_detach(netdev);
5313
5314 if (netif_running(netdev)) {
5315 ixgbe_down(adapter);
5316 ixgbe_free_irq(adapter);
5317 ixgbe_free_all_tx_resources(adapter);
5318 ixgbe_free_all_rx_resources(adapter);
5319 }
5320
5321 ixgbe_clear_interrupt_scheme(adapter);
5322
5323 #ifdef CONFIG_PM
5324 retval = pci_save_state(pdev);
5325 if (retval)
5326 return retval;
5327
5328 #endif
5329 if (wufc) {
5330 ixgbe_set_rx_mode(netdev);
5331
5332 /* turn on all-multi mode if wake on multicast is enabled */
5333 if (wufc & IXGBE_WUFC_MC) {
5334 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5335 fctrl |= IXGBE_FCTRL_MPE;
5336 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
5337 }
5338
5339 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
5340 ctrl |= IXGBE_CTRL_GIO_DIS;
5341 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
5342
5343 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
5344 } else {
5345 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
5346 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
5347 }
5348
5349 if (wufc && hw->mac.type == ixgbe_mac_82599EB)
5350 pci_wake_from_d3(pdev, true);
5351 else
5352 pci_wake_from_d3(pdev, false);
5353
5354 *enable_wake = !!wufc;
5355
5356 ixgbe_release_hw_control(adapter);
5357
5358 pci_disable_device(pdev);
5359
5360 return 0;
5361 }
5362
5363 #ifdef CONFIG_PM
5364 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
5365 {
5366 int retval;
5367 bool wake;
5368
5369 retval = __ixgbe_shutdown(pdev, &wake);
5370 if (retval)
5371 return retval;
5372
5373 if (wake) {
5374 pci_prepare_to_sleep(pdev);
5375 } else {
5376 pci_wake_from_d3(pdev, false);
5377 pci_set_power_state(pdev, PCI_D3hot);
5378 }
5379
5380 return 0;
5381 }
5382 #endif /* CONFIG_PM */
5383
5384 static void ixgbe_shutdown(struct pci_dev *pdev)
5385 {
5386 bool wake;
5387
5388 __ixgbe_shutdown(pdev, &wake);
5389
5390 if (system_state == SYSTEM_POWER_OFF) {
5391 pci_wake_from_d3(pdev, wake);
5392 pci_set_power_state(pdev, PCI_D3hot);
5393 }
5394 }
5395
5396 /**
5397 * ixgbe_update_stats - Update the board statistics counters.
5398 * @adapter: board private structure
5399 **/
5400 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
5401 {
5402 struct net_device *netdev = adapter->netdev;
5403 struct ixgbe_hw *hw = &adapter->hw;
5404 struct ixgbe_hw_stats *hwstats = &adapter->stats;
5405 u64 total_mpc = 0;
5406 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
5407 u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
5408 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
5409 u64 bytes = 0, packets = 0;
5410
5411 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5412 test_bit(__IXGBE_RESETTING, &adapter->state))
5413 return;
5414
5415 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
5416 u64 rsc_count = 0;
5417 u64 rsc_flush = 0;
5418 for (i = 0; i < 16; i++)
5419 adapter->hw_rx_no_dma_resources +=
5420 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5421 for (i = 0; i < adapter->num_rx_queues; i++) {
5422 rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
5423 rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
5424 }
5425 adapter->rsc_total_count = rsc_count;
5426 adapter->rsc_total_flush = rsc_flush;
5427 }
5428
5429 for (i = 0; i < adapter->num_rx_queues; i++) {
5430 struct ixgbe_ring *rx_ring = adapter->rx_ring[i];
5431 non_eop_descs += rx_ring->rx_stats.non_eop_descs;
5432 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
5433 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
5434 bytes += rx_ring->stats.bytes;
5435 packets += rx_ring->stats.packets;
5436 }
5437 adapter->non_eop_descs = non_eop_descs;
5438 adapter->alloc_rx_page_failed = alloc_rx_page_failed;
5439 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
5440 netdev->stats.rx_bytes = bytes;
5441 netdev->stats.rx_packets = packets;
5442
5443 bytes = 0;
5444 packets = 0;
5445 /* gather some stats to the adapter struct that are per queue */
5446 for (i = 0; i < adapter->num_tx_queues; i++) {
5447 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
5448 restart_queue += tx_ring->tx_stats.restart_queue;
5449 tx_busy += tx_ring->tx_stats.tx_busy;
5450 bytes += tx_ring->stats.bytes;
5451 packets += tx_ring->stats.packets;
5452 }
5453 adapter->restart_queue = restart_queue;
5454 adapter->tx_busy = tx_busy;
5455 netdev->stats.tx_bytes = bytes;
5456 netdev->stats.tx_packets = packets;
5457
5458 hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
5459 for (i = 0; i < 8; i++) {
5460 /* for packet buffers not used, the register should read 0 */
5461 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
5462 missed_rx += mpc;
5463 hwstats->mpc[i] += mpc;
5464 total_mpc += hwstats->mpc[i];
5465 if (hw->mac.type == ixgbe_mac_82598EB)
5466 hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
5467 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
5468 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
5469 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
5470 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
5471 if (hw->mac.type == ixgbe_mac_82599EB) {
5472 hwstats->pxonrxc[i] +=
5473 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
5474 hwstats->pxoffrxc[i] +=
5475 IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
5476 hwstats->qprdc[i] += IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5477 } else {
5478 hwstats->pxonrxc[i] +=
5479 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
5480 hwstats->pxoffrxc[i] +=
5481 IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
5482 }
5483 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
5484 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
5485 }
5486 hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
5487 /* work around hardware counting issue */
5488 hwstats->gprc -= missed_rx;
5489
5490 /* 82598 hardware only has a 32 bit counter in the high register */
5491 if (hw->mac.type == ixgbe_mac_82599EB) {
5492 u64 tmp;
5493 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
5494 tmp = IXGBE_READ_REG(hw, IXGBE_GORCH) & 0xF;
5495 /* 4 high bits of GORC */
5496 hwstats->gorc += (tmp << 32);
5497 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
5498 tmp = IXGBE_READ_REG(hw, IXGBE_GOTCH) & 0xF;
5499 /* 4 high bits of GOTC */
5500 hwstats->gotc += (tmp << 32);
5501 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
5502 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
5503 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
5504 hwstats->lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
5505 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
5506 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
5507 #ifdef IXGBE_FCOE
5508 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
5509 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
5510 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
5511 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
5512 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
5513 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
5514 #endif /* IXGBE_FCOE */
5515 } else {
5516 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
5517 hwstats->lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
5518 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
5519 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
5520 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
5521 }
5522 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
5523 hwstats->bprc += bprc;
5524 hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
5525 if (hw->mac.type == ixgbe_mac_82598EB)
5526 hwstats->mprc -= bprc;
5527 hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
5528 hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
5529 hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
5530 hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
5531 hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
5532 hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
5533 hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
5534 hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
5535 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
5536 hwstats->lxontxc += lxon;
5537 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
5538 hwstats->lxofftxc += lxoff;
5539 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5540 hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
5541 hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
5542 /*
5543 * 82598 errata - tx of flow control packets is included in tx counters
5544 */
5545 xon_off_tot = lxon + lxoff;
5546 hwstats->gptc -= xon_off_tot;
5547 hwstats->mptc -= xon_off_tot;
5548 hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
5549 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5550 hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
5551 hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
5552 hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
5553 hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
5554 hwstats->ptc64 -= xon_off_tot;
5555 hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
5556 hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
5557 hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
5558 hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
5559 hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
5560 hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
5561
5562 /* Fill out the OS statistics structure */
5563 netdev->stats.multicast = hwstats->mprc;
5564
5565 /* Rx Errors */
5566 netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
5567 netdev->stats.rx_dropped = 0;
5568 netdev->stats.rx_length_errors = hwstats->rlec;
5569 netdev->stats.rx_crc_errors = hwstats->crcerrs;
5570 netdev->stats.rx_missed_errors = total_mpc;
5571 }
5572
5573 /**
5574 * ixgbe_watchdog - Timer Call-back
5575 * @data: pointer to adapter cast into an unsigned long
5576 **/
5577 static void ixgbe_watchdog(unsigned long data)
5578 {
5579 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
5580 struct ixgbe_hw *hw = &adapter->hw;
5581 u64 eics = 0;
5582 int i;
5583
5584 /*
5585 * Do the watchdog outside of interrupt context due to the lovely
5586 * delays that some of the newer hardware requires
5587 */
5588
5589 if (test_bit(__IXGBE_DOWN, &adapter->state))
5590 goto watchdog_short_circuit;
5591
5592 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
5593 /*
5594 * for legacy and MSI interrupts don't set any bits
5595 * that are enabled for EIAM, because this operation
5596 * would set *both* EIMS and EICS for any bit in EIAM
5597 */
5598 IXGBE_WRITE_REG(hw, IXGBE_EICS,
5599 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
5600 goto watchdog_reschedule;
5601 }
5602
5603 /* get one bit for every active tx/rx interrupt vector */
5604 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
5605 struct ixgbe_q_vector *qv = adapter->q_vector[i];
5606 if (qv->rxr_count || qv->txr_count)
5607 eics |= ((u64)1 << i);
5608 }
5609
5610 /* Cause software interrupt to ensure rx rings are cleaned */
5611 ixgbe_irq_rearm_queues(adapter, eics);
5612
5613 watchdog_reschedule:
5614 /* Reset the timer */
5615 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
5616
5617 watchdog_short_circuit:
5618 schedule_work(&adapter->watchdog_task);
5619 }
5620
5621 /**
5622 * ixgbe_multispeed_fiber_task - worker thread to configure multispeed fiber
5623 * @work: pointer to work_struct containing our data
5624 **/
5625 static void ixgbe_multispeed_fiber_task(struct work_struct *work)
5626 {
5627 struct ixgbe_adapter *adapter = container_of(work,
5628 struct ixgbe_adapter,
5629 multispeed_fiber_task);
5630 struct ixgbe_hw *hw = &adapter->hw;
5631 u32 autoneg;
5632 bool negotiation;
5633
5634 adapter->flags |= IXGBE_FLAG_IN_SFP_LINK_TASK;
5635 autoneg = hw->phy.autoneg_advertised;
5636 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
5637 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
5638 hw->mac.autotry_restart = false;
5639 if (hw->mac.ops.setup_link)
5640 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
5641 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
5642 adapter->flags &= ~IXGBE_FLAG_IN_SFP_LINK_TASK;
5643 }
5644
5645 /**
5646 * ixgbe_sfp_config_module_task - worker thread to configure a new SFP+ module
5647 * @work: pointer to work_struct containing our data
5648 **/
5649 static void ixgbe_sfp_config_module_task(struct work_struct *work)
5650 {
5651 struct ixgbe_adapter *adapter = container_of(work,
5652 struct ixgbe_adapter,
5653 sfp_config_module_task);
5654 struct ixgbe_hw *hw = &adapter->hw;
5655 u32 err;
5656
5657 adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
5658
5659 /* Time for electrical oscillations to settle down */
5660 msleep(100);
5661 err = hw->phy.ops.identify_sfp(hw);
5662
5663 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5664 e_dev_err("failed to initialize because an unsupported SFP+ "
5665 "module type was detected.\n");
5666 e_dev_err("Reload the driver after installing a supported "
5667 "module.\n");
5668 unregister_netdev(adapter->netdev);
5669 return;
5670 }
5671 hw->mac.ops.setup_sfp(hw);
5672
5673 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
5674 /* This will also work for DA Twinax connections */
5675 schedule_work(&adapter->multispeed_fiber_task);
5676 adapter->flags &= ~IXGBE_FLAG_IN_SFP_MOD_TASK;
5677 }
5678
5679 /**
5680 * ixgbe_fdir_reinit_task - worker thread to reinit FDIR filter table
5681 * @work: pointer to work_struct containing our data
5682 **/
5683 static void ixgbe_fdir_reinit_task(struct work_struct *work)
5684 {
5685 struct ixgbe_adapter *adapter = container_of(work,
5686 struct ixgbe_adapter,
5687 fdir_reinit_task);
5688 struct ixgbe_hw *hw = &adapter->hw;
5689 int i;
5690
5691 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
5692 for (i = 0; i < adapter->num_tx_queues; i++)
5693 set_bit(__IXGBE_FDIR_INIT_DONE,
5694 &(adapter->tx_ring[i]->reinit_state));
5695 } else {
5696 e_err(probe, "failed to finish FDIR re-initialization, "
5697 "ignored adding FDIR ATR filters\n");
5698 }
5699 /* Done FDIR Re-initialization, enable transmits */
5700 netif_tx_start_all_queues(adapter->netdev);
5701 }
5702
5703 static DEFINE_MUTEX(ixgbe_watchdog_lock);
5704
5705 /**
5706 * ixgbe_watchdog_task - worker thread to bring link up
5707 * @work: pointer to work_struct containing our data
5708 **/
5709 static void ixgbe_watchdog_task(struct work_struct *work)
5710 {
5711 struct ixgbe_adapter *adapter = container_of(work,
5712 struct ixgbe_adapter,
5713 watchdog_task);
5714 struct net_device *netdev = adapter->netdev;
5715 struct ixgbe_hw *hw = &adapter->hw;
5716 u32 link_speed;
5717 bool link_up;
5718 int i;
5719 struct ixgbe_ring *tx_ring;
5720 int some_tx_pending = 0;
5721
5722 mutex_lock(&ixgbe_watchdog_lock);
5723
5724 link_up = adapter->link_up;
5725 link_speed = adapter->link_speed;
5726
5727 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
5728 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
5729 if (link_up) {
5730 #ifdef CONFIG_DCB
5731 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5732 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
5733 hw->mac.ops.fc_enable(hw, i);
5734 } else {
5735 hw->mac.ops.fc_enable(hw, 0);
5736 }
5737 #else
5738 hw->mac.ops.fc_enable(hw, 0);
5739 #endif
5740 }
5741
5742 if (link_up ||
5743 time_after(jiffies, (adapter->link_check_timeout +
5744 IXGBE_TRY_LINK_TIMEOUT))) {
5745 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5746 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
5747 }
5748 adapter->link_up = link_up;
5749 adapter->link_speed = link_speed;
5750 }
5751
5752 if (link_up) {
5753 if (!netif_carrier_ok(netdev)) {
5754 bool flow_rx, flow_tx;
5755
5756 if (hw->mac.type == ixgbe_mac_82599EB) {
5757 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
5758 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
5759 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
5760 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
5761 } else {
5762 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5763 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
5764 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
5765 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
5766 }
5767
5768 e_info(drv, "NIC Link is Up %s, Flow Control: %s\n",
5769 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
5770 "10 Gbps" :
5771 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
5772 "1 Gbps" : "unknown speed")),
5773 ((flow_rx && flow_tx) ? "RX/TX" :
5774 (flow_rx ? "RX" :
5775 (flow_tx ? "TX" : "None"))));
5776
5777 netif_carrier_on(netdev);
5778 } else {
5779 /* Force detection of hung controller */
5780 adapter->detect_tx_hung = true;
5781 }
5782 } else {
5783 adapter->link_up = false;
5784 adapter->link_speed = 0;
5785 if (netif_carrier_ok(netdev)) {
5786 e_info(drv, "NIC Link is Down\n");
5787 netif_carrier_off(netdev);
5788 }
5789 }
5790
5791 if (!netif_carrier_ok(netdev)) {
5792 for (i = 0; i < adapter->num_tx_queues; i++) {
5793 tx_ring = adapter->tx_ring[i];
5794 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
5795 some_tx_pending = 1;
5796 break;
5797 }
5798 }
5799
5800 if (some_tx_pending) {
5801 /* We've lost link, so the controller stops DMA,
5802 * but we've got queued Tx work that's never going
5803 * to get done, so reset controller to flush Tx.
5804 * (Do the reset outside of interrupt context).
5805 */
5806 schedule_work(&adapter->reset_task);
5807 }
5808 }
5809
5810 ixgbe_update_stats(adapter);
5811 mutex_unlock(&ixgbe_watchdog_lock);
5812 }
5813
5814 static int ixgbe_tso(struct ixgbe_adapter *adapter,
5815 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
5816 u32 tx_flags, u8 *hdr_len, __be16 protocol)
5817 {
5818 struct ixgbe_adv_tx_context_desc *context_desc;
5819 unsigned int i;
5820 int err;
5821 struct ixgbe_tx_buffer *tx_buffer_info;
5822 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
5823 u32 mss_l4len_idx, l4len;
5824
5825 if (skb_is_gso(skb)) {
5826 if (skb_header_cloned(skb)) {
5827 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
5828 if (err)
5829 return err;
5830 }
5831 l4len = tcp_hdrlen(skb);
5832 *hdr_len += l4len;
5833
5834 if (protocol == htons(ETH_P_IP)) {
5835 struct iphdr *iph = ip_hdr(skb);
5836 iph->tot_len = 0;
5837 iph->check = 0;
5838 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
5839 iph->daddr, 0,
5840 IPPROTO_TCP,
5841 0);
5842 } else if (skb_is_gso_v6(skb)) {
5843 ipv6_hdr(skb)->payload_len = 0;
5844 tcp_hdr(skb)->check =
5845 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
5846 &ipv6_hdr(skb)->daddr,
5847 0, IPPROTO_TCP, 0);
5848 }
5849
5850 i = tx_ring->next_to_use;
5851
5852 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5853 context_desc = IXGBE_TX_CTXTDESC_ADV(tx_ring, i);
5854
5855 /* VLAN MACLEN IPLEN */
5856 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5857 vlan_macip_lens |=
5858 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
5859 vlan_macip_lens |= ((skb_network_offset(skb)) <<
5860 IXGBE_ADVTXD_MACLEN_SHIFT);
5861 *hdr_len += skb_network_offset(skb);
5862 vlan_macip_lens |=
5863 (skb_transport_header(skb) - skb_network_header(skb));
5864 *hdr_len +=
5865 (skb_transport_header(skb) - skb_network_header(skb));
5866 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
5867 context_desc->seqnum_seed = 0;
5868
5869 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
5870 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
5871 IXGBE_ADVTXD_DTYP_CTXT);
5872
5873 if (protocol == htons(ETH_P_IP))
5874 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
5875 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
5876 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
5877
5878 /* MSS L4LEN IDX */
5879 mss_l4len_idx =
5880 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
5881 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
5882 /* use index 1 for TSO */
5883 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
5884 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
5885
5886 tx_buffer_info->time_stamp = jiffies;
5887 tx_buffer_info->next_to_watch = i;
5888
5889 i++;
5890 if (i == tx_ring->count)
5891 i = 0;
5892 tx_ring->next_to_use = i;
5893
5894 return true;
5895 }
5896 return false;
5897 }
5898
5899 static u32 ixgbe_psum(struct ixgbe_adapter *adapter, struct sk_buff *skb,
5900 __be16 protocol)
5901 {
5902 u32 rtn = 0;
5903
5904 switch (protocol) {
5905 case cpu_to_be16(ETH_P_IP):
5906 rtn |= IXGBE_ADVTXD_TUCMD_IPV4;
5907 switch (ip_hdr(skb)->protocol) {
5908 case IPPROTO_TCP:
5909 rtn |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
5910 break;
5911 case IPPROTO_SCTP:
5912 rtn |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
5913 break;
5914 }
5915 break;
5916 case cpu_to_be16(ETH_P_IPV6):
5917 /* XXX what about other V6 headers?? */
5918 switch (ipv6_hdr(skb)->nexthdr) {
5919 case IPPROTO_TCP:
5920 rtn |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
5921 break;
5922 case IPPROTO_SCTP:
5923 rtn |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
5924 break;
5925 }
5926 break;
5927 default:
5928 if (unlikely(net_ratelimit()))
5929 e_warn(probe, "partial checksum but proto=%x!\n",
5930 protocol);
5931 break;
5932 }
5933
5934 return rtn;
5935 }
5936
5937 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
5938 struct ixgbe_ring *tx_ring,
5939 struct sk_buff *skb, u32 tx_flags,
5940 __be16 protocol)
5941 {
5942 struct ixgbe_adv_tx_context_desc *context_desc;
5943 unsigned int i;
5944 struct ixgbe_tx_buffer *tx_buffer_info;
5945 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
5946
5947 if (skb->ip_summed == CHECKSUM_PARTIAL ||
5948 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
5949 i = tx_ring->next_to_use;
5950 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5951 context_desc = IXGBE_TX_CTXTDESC_ADV(tx_ring, i);
5952
5953 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5954 vlan_macip_lens |=
5955 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
5956 vlan_macip_lens |= (skb_network_offset(skb) <<
5957 IXGBE_ADVTXD_MACLEN_SHIFT);
5958 if (skb->ip_summed == CHECKSUM_PARTIAL)
5959 vlan_macip_lens |= (skb_transport_header(skb) -
5960 skb_network_header(skb));
5961
5962 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
5963 context_desc->seqnum_seed = 0;
5964
5965 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
5966 IXGBE_ADVTXD_DTYP_CTXT);
5967
5968 if (skb->ip_summed == CHECKSUM_PARTIAL)
5969 type_tucmd_mlhl |= ixgbe_psum(adapter, skb, protocol);
5970
5971 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
5972 /* use index zero for tx checksum offload */
5973 context_desc->mss_l4len_idx = 0;
5974
5975 tx_buffer_info->time_stamp = jiffies;
5976 tx_buffer_info->next_to_watch = i;
5977
5978 i++;
5979 if (i == tx_ring->count)
5980 i = 0;
5981 tx_ring->next_to_use = i;
5982
5983 return true;
5984 }
5985
5986 return false;
5987 }
5988
5989 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
5990 struct ixgbe_ring *tx_ring,
5991 struct sk_buff *skb, u32 tx_flags,
5992 unsigned int first, const u8 hdr_len)
5993 {
5994 struct device *dev = tx_ring->dev;
5995 struct ixgbe_tx_buffer *tx_buffer_info;
5996 unsigned int len;
5997 unsigned int total = skb->len;
5998 unsigned int offset = 0, size, count = 0, i;
5999 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
6000 unsigned int f;
6001 unsigned int bytecount = skb->len;
6002 u16 gso_segs = 1;
6003
6004 i = tx_ring->next_to_use;
6005
6006 if (tx_flags & IXGBE_TX_FLAGS_FCOE)
6007 /* excluding fcoe_crc_eof for FCoE */
6008 total -= sizeof(struct fcoe_crc_eof);
6009
6010 len = min(skb_headlen(skb), total);
6011 while (len) {
6012 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6013 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
6014
6015 tx_buffer_info->length = size;
6016 tx_buffer_info->mapped_as_page = false;
6017 tx_buffer_info->dma = dma_map_single(dev,
6018 skb->data + offset,
6019 size, DMA_TO_DEVICE);
6020 if (dma_mapping_error(dev, tx_buffer_info->dma))
6021 goto dma_error;
6022 tx_buffer_info->time_stamp = jiffies;
6023 tx_buffer_info->next_to_watch = i;
6024
6025 len -= size;
6026 total -= size;
6027 offset += size;
6028 count++;
6029
6030 if (len) {
6031 i++;
6032 if (i == tx_ring->count)
6033 i = 0;
6034 }
6035 }
6036
6037 for (f = 0; f < nr_frags; f++) {
6038 struct skb_frag_struct *frag;
6039
6040 frag = &skb_shinfo(skb)->frags[f];
6041 len = min((unsigned int)frag->size, total);
6042 offset = frag->page_offset;
6043
6044 while (len) {
6045 i++;
6046 if (i == tx_ring->count)
6047 i = 0;
6048
6049 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6050 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
6051
6052 tx_buffer_info->length = size;
6053 tx_buffer_info->dma = dma_map_page(dev,
6054 frag->page,
6055 offset, size,
6056 DMA_TO_DEVICE);
6057 tx_buffer_info->mapped_as_page = true;
6058 if (dma_mapping_error(dev, tx_buffer_info->dma))
6059 goto dma_error;
6060 tx_buffer_info->time_stamp = jiffies;
6061 tx_buffer_info->next_to_watch = i;
6062
6063 len -= size;
6064 total -= size;
6065 offset += size;
6066 count++;
6067 }
6068 if (total == 0)
6069 break;
6070 }
6071
6072 if (tx_flags & IXGBE_TX_FLAGS_TSO)
6073 gso_segs = skb_shinfo(skb)->gso_segs;
6074 #ifdef IXGBE_FCOE
6075 /* adjust for FCoE Sequence Offload */
6076 else if (tx_flags & IXGBE_TX_FLAGS_FSO)
6077 gso_segs = DIV_ROUND_UP(skb->len - hdr_len,
6078 skb_shinfo(skb)->gso_size);
6079 #endif /* IXGBE_FCOE */
6080 bytecount += (gso_segs - 1) * hdr_len;
6081
6082 /* multiply data chunks by size of headers */
6083 tx_ring->tx_buffer_info[i].bytecount = bytecount;
6084 tx_ring->tx_buffer_info[i].gso_segs = gso_segs;
6085 tx_ring->tx_buffer_info[i].skb = skb;
6086 tx_ring->tx_buffer_info[first].next_to_watch = i;
6087
6088 return count;
6089
6090 dma_error:
6091 e_dev_err("TX DMA map failed\n");
6092
6093 /* clear timestamp and dma mappings for failed tx_buffer_info map */
6094 tx_buffer_info->dma = 0;
6095 tx_buffer_info->time_stamp = 0;
6096 tx_buffer_info->next_to_watch = 0;
6097 if (count)
6098 count--;
6099
6100 /* clear timestamp and dma mappings for remaining portion of packet */
6101 while (count--) {
6102 if (i == 0)
6103 i += tx_ring->count;
6104 i--;
6105 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6106 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
6107 }
6108
6109 return 0;
6110 }
6111
6112 static void ixgbe_tx_queue(struct ixgbe_ring *tx_ring,
6113 int tx_flags, int count, u32 paylen, u8 hdr_len)
6114 {
6115 union ixgbe_adv_tx_desc *tx_desc = NULL;
6116 struct ixgbe_tx_buffer *tx_buffer_info;
6117 u32 olinfo_status = 0, cmd_type_len = 0;
6118 unsigned int i;
6119 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
6120
6121 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
6122
6123 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
6124
6125 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
6126 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
6127
6128 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
6129 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6130
6131 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6132 IXGBE_ADVTXD_POPTS_SHIFT;
6133
6134 /* use index 1 context for tso */
6135 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6136 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
6137 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
6138 IXGBE_ADVTXD_POPTS_SHIFT;
6139
6140 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
6141 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6142 IXGBE_ADVTXD_POPTS_SHIFT;
6143
6144 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6145 olinfo_status |= IXGBE_ADVTXD_CC;
6146 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6147 if (tx_flags & IXGBE_TX_FLAGS_FSO)
6148 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6149 }
6150
6151 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
6152
6153 i = tx_ring->next_to_use;
6154 while (count--) {
6155 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6156 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
6157 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
6158 tx_desc->read.cmd_type_len =
6159 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
6160 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
6161 i++;
6162 if (i == tx_ring->count)
6163 i = 0;
6164 }
6165
6166 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
6167
6168 /*
6169 * Force memory writes to complete before letting h/w
6170 * know there are new descriptors to fetch. (Only
6171 * applicable for weak-ordered memory model archs,
6172 * such as IA-64).
6173 */
6174 wmb();
6175
6176 tx_ring->next_to_use = i;
6177 writel(i, tx_ring->tail);
6178 }
6179
6180 static void ixgbe_atr(struct ixgbe_adapter *adapter, struct sk_buff *skb,
6181 int queue, u32 tx_flags, __be16 protocol)
6182 {
6183 struct ixgbe_atr_input atr_input;
6184 struct tcphdr *th;
6185 struct iphdr *iph = ip_hdr(skb);
6186 struct ethhdr *eth = (struct ethhdr *)skb->data;
6187 u16 vlan_id, src_port, dst_port, flex_bytes;
6188 u32 src_ipv4_addr, dst_ipv4_addr;
6189 u8 l4type = 0;
6190
6191 /* Right now, we support IPv4 only */
6192 if (protocol != htons(ETH_P_IP))
6193 return;
6194 /* check if we're UDP or TCP */
6195 if (iph->protocol == IPPROTO_TCP) {
6196 th = tcp_hdr(skb);
6197 src_port = th->source;
6198 dst_port = th->dest;
6199 l4type |= IXGBE_ATR_L4TYPE_TCP;
6200 /* l4type IPv4 type is 0, no need to assign */
6201 } else {
6202 /* Unsupported L4 header, just bail here */
6203 return;
6204 }
6205
6206 memset(&atr_input, 0, sizeof(struct ixgbe_atr_input));
6207
6208 vlan_id = (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK) >>
6209 IXGBE_TX_FLAGS_VLAN_SHIFT;
6210 src_ipv4_addr = iph->saddr;
6211 dst_ipv4_addr = iph->daddr;
6212 flex_bytes = eth->h_proto;
6213
6214 ixgbe_atr_set_vlan_id_82599(&atr_input, vlan_id);
6215 ixgbe_atr_set_src_port_82599(&atr_input, dst_port);
6216 ixgbe_atr_set_dst_port_82599(&atr_input, src_port);
6217 ixgbe_atr_set_flex_byte_82599(&atr_input, flex_bytes);
6218 ixgbe_atr_set_l4type_82599(&atr_input, l4type);
6219 /* src and dst are inverted, think how the receiver sees them */
6220 ixgbe_atr_set_src_ipv4_82599(&atr_input, dst_ipv4_addr);
6221 ixgbe_atr_set_dst_ipv4_82599(&atr_input, src_ipv4_addr);
6222
6223 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
6224 ixgbe_fdir_add_signature_filter_82599(&adapter->hw, &atr_input, queue);
6225 }
6226
6227 static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, int size)
6228 {
6229 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
6230 /* Herbert's original patch had:
6231 * smp_mb__after_netif_stop_queue();
6232 * but since that doesn't exist yet, just open code it. */
6233 smp_mb();
6234
6235 /* We need to check again in a case another CPU has just
6236 * made room available. */
6237 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
6238 return -EBUSY;
6239
6240 /* A reprieve! - use start_queue because it doesn't call schedule */
6241 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
6242 ++tx_ring->tx_stats.restart_queue;
6243 return 0;
6244 }
6245
6246 static int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, int size)
6247 {
6248 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
6249 return 0;
6250 return __ixgbe_maybe_stop_tx(tx_ring, size);
6251 }
6252
6253 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
6254 {
6255 struct ixgbe_adapter *adapter = netdev_priv(dev);
6256 int txq = smp_processor_id();
6257 #ifdef IXGBE_FCOE
6258 __be16 protocol;
6259
6260 protocol = vlan_get_protocol(skb);
6261
6262 if ((protocol == htons(ETH_P_FCOE)) ||
6263 (protocol == htons(ETH_P_FIP))) {
6264 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
6265 txq &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
6266 txq += adapter->ring_feature[RING_F_FCOE].mask;
6267 return txq;
6268 #ifdef CONFIG_IXGBE_DCB
6269 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6270 txq = adapter->fcoe.up;
6271 return txq;
6272 #endif
6273 }
6274 }
6275 #endif
6276
6277 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
6278 while (unlikely(txq >= dev->real_num_tx_queues))
6279 txq -= dev->real_num_tx_queues;
6280 return txq;
6281 }
6282
6283 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6284 if (skb->priority == TC_PRIO_CONTROL)
6285 txq = adapter->ring_feature[RING_F_DCB].indices-1;
6286 else
6287 txq = (skb->vlan_tci & IXGBE_TX_FLAGS_VLAN_PRIO_MASK)
6288 >> 13;
6289 return txq;
6290 }
6291
6292 return skb_tx_hash(dev, skb);
6293 }
6294
6295 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
6296 struct ixgbe_adapter *adapter,
6297 struct ixgbe_ring *tx_ring)
6298 {
6299 struct net_device *netdev = tx_ring->netdev;
6300 struct netdev_queue *txq;
6301 unsigned int first;
6302 unsigned int tx_flags = 0;
6303 u8 hdr_len = 0;
6304 int tso;
6305 int count = 0;
6306 unsigned int f;
6307 __be16 protocol;
6308
6309 protocol = vlan_get_protocol(skb);
6310
6311 if (vlan_tx_tag_present(skb)) {
6312 tx_flags |= vlan_tx_tag_get(skb);
6313 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6314 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
6315 tx_flags |= ((skb->queue_mapping & 0x7) << 13);
6316 }
6317 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6318 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6319 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED &&
6320 skb->priority != TC_PRIO_CONTROL) {
6321 tx_flags |= ((skb->queue_mapping & 0x7) << 13);
6322 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6323 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6324 }
6325
6326 #ifdef IXGBE_FCOE
6327 /* for FCoE with DCB, we force the priority to what
6328 * was specified by the switch */
6329 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED &&
6330 (protocol == htons(ETH_P_FCOE) ||
6331 protocol == htons(ETH_P_FIP))) {
6332 #ifdef CONFIG_IXGBE_DCB
6333 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6334 tx_flags &= ~(IXGBE_TX_FLAGS_VLAN_PRIO_MASK
6335 << IXGBE_TX_FLAGS_VLAN_SHIFT);
6336 tx_flags |= ((adapter->fcoe.up << 13)
6337 << IXGBE_TX_FLAGS_VLAN_SHIFT);
6338 }
6339 #endif
6340 /* flag for FCoE offloads */
6341 if (protocol == htons(ETH_P_FCOE))
6342 tx_flags |= IXGBE_TX_FLAGS_FCOE;
6343 }
6344 #endif
6345
6346 /* four things can cause us to need a context descriptor */
6347 if (skb_is_gso(skb) ||
6348 (skb->ip_summed == CHECKSUM_PARTIAL) ||
6349 (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
6350 (tx_flags & IXGBE_TX_FLAGS_FCOE))
6351 count++;
6352
6353 count += TXD_USE_COUNT(skb_headlen(skb));
6354 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
6355 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
6356
6357 if (ixgbe_maybe_stop_tx(tx_ring, count)) {
6358 tx_ring->tx_stats.tx_busy++;
6359 return NETDEV_TX_BUSY;
6360 }
6361
6362 first = tx_ring->next_to_use;
6363 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6364 #ifdef IXGBE_FCOE
6365 /* setup tx offload for FCoE */
6366 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
6367 if (tso < 0) {
6368 dev_kfree_skb_any(skb);
6369 return NETDEV_TX_OK;
6370 }
6371 if (tso)
6372 tx_flags |= IXGBE_TX_FLAGS_FSO;
6373 #endif /* IXGBE_FCOE */
6374 } else {
6375 if (protocol == htons(ETH_P_IP))
6376 tx_flags |= IXGBE_TX_FLAGS_IPV4;
6377 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len,
6378 protocol);
6379 if (tso < 0) {
6380 dev_kfree_skb_any(skb);
6381 return NETDEV_TX_OK;
6382 }
6383
6384 if (tso)
6385 tx_flags |= IXGBE_TX_FLAGS_TSO;
6386 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags,
6387 protocol) &&
6388 (skb->ip_summed == CHECKSUM_PARTIAL))
6389 tx_flags |= IXGBE_TX_FLAGS_CSUM;
6390 }
6391
6392 count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first, hdr_len);
6393 if (count) {
6394 /* add the ATR filter if ATR is on */
6395 if (tx_ring->atr_sample_rate) {
6396 ++tx_ring->atr_count;
6397 if ((tx_ring->atr_count >= tx_ring->atr_sample_rate) &&
6398 test_bit(__IXGBE_FDIR_INIT_DONE,
6399 &tx_ring->reinit_state)) {
6400 ixgbe_atr(adapter, skb, tx_ring->queue_index,
6401 tx_flags, protocol);
6402 tx_ring->atr_count = 0;
6403 }
6404 }
6405 txq = netdev_get_tx_queue(netdev, tx_ring->queue_index);
6406 txq->tx_bytes += skb->len;
6407 txq->tx_packets++;
6408 ixgbe_tx_queue(tx_ring, tx_flags, count, skb->len, hdr_len);
6409 ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);
6410
6411 } else {
6412 dev_kfree_skb_any(skb);
6413 tx_ring->tx_buffer_info[first].time_stamp = 0;
6414 tx_ring->next_to_use = first;
6415 }
6416
6417 return NETDEV_TX_OK;
6418 }
6419
6420 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
6421 {
6422 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6423 struct ixgbe_ring *tx_ring;
6424
6425 tx_ring = adapter->tx_ring[skb->queue_mapping];
6426 return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
6427 }
6428
6429 /**
6430 * ixgbe_set_mac - Change the Ethernet Address of the NIC
6431 * @netdev: network interface device structure
6432 * @p: pointer to an address structure
6433 *
6434 * Returns 0 on success, negative on failure
6435 **/
6436 static int ixgbe_set_mac(struct net_device *netdev, void *p)
6437 {
6438 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6439 struct ixgbe_hw *hw = &adapter->hw;
6440 struct sockaddr *addr = p;
6441
6442 if (!is_valid_ether_addr(addr->sa_data))
6443 return -EADDRNOTAVAIL;
6444
6445 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
6446 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
6447
6448 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
6449 IXGBE_RAH_AV);
6450
6451 return 0;
6452 }
6453
6454 static int
6455 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
6456 {
6457 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6458 struct ixgbe_hw *hw = &adapter->hw;
6459 u16 value;
6460 int rc;
6461
6462 if (prtad != hw->phy.mdio.prtad)
6463 return -EINVAL;
6464 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
6465 if (!rc)
6466 rc = value;
6467 return rc;
6468 }
6469
6470 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
6471 u16 addr, u16 value)
6472 {
6473 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6474 struct ixgbe_hw *hw = &adapter->hw;
6475
6476 if (prtad != hw->phy.mdio.prtad)
6477 return -EINVAL;
6478 return hw->phy.ops.write_reg(hw, addr, devad, value);
6479 }
6480
6481 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
6482 {
6483 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6484
6485 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
6486 }
6487
6488 /**
6489 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
6490 * netdev->dev_addrs
6491 * @netdev: network interface device structure
6492 *
6493 * Returns non-zero on failure
6494 **/
6495 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
6496 {
6497 int err = 0;
6498 struct ixgbe_adapter *adapter = netdev_priv(dev);
6499 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6500
6501 if (is_valid_ether_addr(mac->san_addr)) {
6502 rtnl_lock();
6503 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6504 rtnl_unlock();
6505 }
6506 return err;
6507 }
6508
6509 /**
6510 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
6511 * netdev->dev_addrs
6512 * @netdev: network interface device structure
6513 *
6514 * Returns non-zero on failure
6515 **/
6516 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
6517 {
6518 int err = 0;
6519 struct ixgbe_adapter *adapter = netdev_priv(dev);
6520 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6521
6522 if (is_valid_ether_addr(mac->san_addr)) {
6523 rtnl_lock();
6524 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6525 rtnl_unlock();
6526 }
6527 return err;
6528 }
6529
6530 #ifdef CONFIG_NET_POLL_CONTROLLER
6531 /*
6532 * Polling 'interrupt' - used by things like netconsole to send skbs
6533 * without having to re-enable interrupts. It's not called while
6534 * the interrupt routine is executing.
6535 */
6536 static void ixgbe_netpoll(struct net_device *netdev)
6537 {
6538 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6539 int i;
6540
6541 /* if interface is down do nothing */
6542 if (test_bit(__IXGBE_DOWN, &adapter->state))
6543 return;
6544
6545 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
6546 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
6547 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
6548 for (i = 0; i < num_q_vectors; i++) {
6549 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
6550 ixgbe_msix_clean_many(0, q_vector);
6551 }
6552 } else {
6553 ixgbe_intr(adapter->pdev->irq, netdev);
6554 }
6555 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
6556 }
6557 #endif
6558
6559 static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
6560 struct rtnl_link_stats64 *stats)
6561 {
6562 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6563 int i;
6564
6565 /* accurate rx/tx bytes/packets stats */
6566 dev_txq_stats_fold(netdev, stats);
6567 rcu_read_lock();
6568 for (i = 0; i < adapter->num_rx_queues; i++) {
6569 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]);
6570 u64 bytes, packets;
6571 unsigned int start;
6572
6573 if (ring) {
6574 do {
6575 start = u64_stats_fetch_begin_bh(&ring->syncp);
6576 packets = ring->stats.packets;
6577 bytes = ring->stats.bytes;
6578 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
6579 stats->rx_packets += packets;
6580 stats->rx_bytes += bytes;
6581 }
6582 }
6583 rcu_read_unlock();
6584 /* following stats updated by ixgbe_watchdog_task() */
6585 stats->multicast = netdev->stats.multicast;
6586 stats->rx_errors = netdev->stats.rx_errors;
6587 stats->rx_length_errors = netdev->stats.rx_length_errors;
6588 stats->rx_crc_errors = netdev->stats.rx_crc_errors;
6589 stats->rx_missed_errors = netdev->stats.rx_missed_errors;
6590 return stats;
6591 }
6592
6593
6594 static const struct net_device_ops ixgbe_netdev_ops = {
6595 .ndo_open = ixgbe_open,
6596 .ndo_stop = ixgbe_close,
6597 .ndo_start_xmit = ixgbe_xmit_frame,
6598 .ndo_select_queue = ixgbe_select_queue,
6599 .ndo_set_rx_mode = ixgbe_set_rx_mode,
6600 .ndo_set_multicast_list = ixgbe_set_rx_mode,
6601 .ndo_validate_addr = eth_validate_addr,
6602 .ndo_set_mac_address = ixgbe_set_mac,
6603 .ndo_change_mtu = ixgbe_change_mtu,
6604 .ndo_tx_timeout = ixgbe_tx_timeout,
6605 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
6606 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
6607 .ndo_do_ioctl = ixgbe_ioctl,
6608 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
6609 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
6610 .ndo_set_vf_tx_rate = ixgbe_ndo_set_vf_bw,
6611 .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
6612 .ndo_get_stats64 = ixgbe_get_stats64,
6613 #ifdef CONFIG_NET_POLL_CONTROLLER
6614 .ndo_poll_controller = ixgbe_netpoll,
6615 #endif
6616 #ifdef IXGBE_FCOE
6617 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
6618 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
6619 .ndo_fcoe_enable = ixgbe_fcoe_enable,
6620 .ndo_fcoe_disable = ixgbe_fcoe_disable,
6621 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
6622 #endif /* IXGBE_FCOE */
6623 };
6624
6625 static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter,
6626 const struct ixgbe_info *ii)
6627 {
6628 #ifdef CONFIG_PCI_IOV
6629 struct ixgbe_hw *hw = &adapter->hw;
6630 int err;
6631
6632 if (hw->mac.type != ixgbe_mac_82599EB || !max_vfs)
6633 return;
6634
6635 /* The 82599 supports up to 64 VFs per physical function
6636 * but this implementation limits allocation to 63 so that
6637 * basic networking resources are still available to the
6638 * physical function
6639 */
6640 adapter->num_vfs = (max_vfs > 63) ? 63 : max_vfs;
6641 adapter->flags |= IXGBE_FLAG_SRIOV_ENABLED;
6642 err = pci_enable_sriov(adapter->pdev, adapter->num_vfs);
6643 if (err) {
6644 e_err(probe, "Failed to enable PCI sriov: %d\n", err);
6645 goto err_novfs;
6646 }
6647 /* If call to enable VFs succeeded then allocate memory
6648 * for per VF control structures.
6649 */
6650 adapter->vfinfo =
6651 kcalloc(adapter->num_vfs,
6652 sizeof(struct vf_data_storage), GFP_KERNEL);
6653 if (adapter->vfinfo) {
6654 /* Now that we're sure SR-IOV is enabled
6655 * and memory allocated set up the mailbox parameters
6656 */
6657 ixgbe_init_mbx_params_pf(hw);
6658 memcpy(&hw->mbx.ops, ii->mbx_ops,
6659 sizeof(hw->mbx.ops));
6660
6661 /* Disable RSC when in SR-IOV mode */
6662 adapter->flags2 &= ~(IXGBE_FLAG2_RSC_CAPABLE |
6663 IXGBE_FLAG2_RSC_ENABLED);
6664 return;
6665 }
6666
6667 /* Oh oh */
6668 e_err(probe, "Unable to allocate memory for VF Data Storage - "
6669 "SRIOV disabled\n");
6670 pci_disable_sriov(adapter->pdev);
6671
6672 err_novfs:
6673 adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
6674 adapter->num_vfs = 0;
6675 #endif /* CONFIG_PCI_IOV */
6676 }
6677
6678 /**
6679 * ixgbe_probe - Device Initialization Routine
6680 * @pdev: PCI device information struct
6681 * @ent: entry in ixgbe_pci_tbl
6682 *
6683 * Returns 0 on success, negative on failure
6684 *
6685 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
6686 * The OS initialization, configuring of the adapter private structure,
6687 * and a hardware reset occur.
6688 **/
6689 static int __devinit ixgbe_probe(struct pci_dev *pdev,
6690 const struct pci_device_id *ent)
6691 {
6692 struct net_device *netdev;
6693 struct ixgbe_adapter *adapter = NULL;
6694 struct ixgbe_hw *hw;
6695 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
6696 static int cards_found;
6697 int i, err, pci_using_dac;
6698 unsigned int indices = num_possible_cpus();
6699 #ifdef IXGBE_FCOE
6700 u16 device_caps;
6701 #endif
6702 u32 part_num, eec;
6703
6704 /* Catch broken hardware that put the wrong VF device ID in
6705 * the PCIe SR-IOV capability.
6706 */
6707 if (pdev->is_virtfn) {
6708 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
6709 pci_name(pdev), pdev->vendor, pdev->device);
6710 return -EINVAL;
6711 }
6712
6713 err = pci_enable_device_mem(pdev);
6714 if (err)
6715 return err;
6716
6717 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
6718 !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
6719 pci_using_dac = 1;
6720 } else {
6721 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
6722 if (err) {
6723 err = dma_set_coherent_mask(&pdev->dev,
6724 DMA_BIT_MASK(32));
6725 if (err) {
6726 dev_err(&pdev->dev,
6727 "No usable DMA configuration, aborting\n");
6728 goto err_dma;
6729 }
6730 }
6731 pci_using_dac = 0;
6732 }
6733
6734 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
6735 IORESOURCE_MEM), ixgbe_driver_name);
6736 if (err) {
6737 dev_err(&pdev->dev,
6738 "pci_request_selected_regions failed 0x%x\n", err);
6739 goto err_pci_reg;
6740 }
6741
6742 pci_enable_pcie_error_reporting(pdev);
6743
6744 pci_set_master(pdev);
6745 pci_save_state(pdev);
6746
6747 if (ii->mac == ixgbe_mac_82598EB)
6748 indices = min_t(unsigned int, indices, IXGBE_MAX_RSS_INDICES);
6749 else
6750 indices = min_t(unsigned int, indices, IXGBE_MAX_FDIR_INDICES);
6751
6752 indices = max_t(unsigned int, indices, IXGBE_MAX_DCB_INDICES);
6753 #ifdef IXGBE_FCOE
6754 indices += min_t(unsigned int, num_possible_cpus(),
6755 IXGBE_MAX_FCOE_INDICES);
6756 #endif
6757 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
6758 if (!netdev) {
6759 err = -ENOMEM;
6760 goto err_alloc_etherdev;
6761 }
6762
6763 SET_NETDEV_DEV(netdev, &pdev->dev);
6764
6765 pci_set_drvdata(pdev, netdev);
6766 adapter = netdev_priv(netdev);
6767
6768 adapter->netdev = netdev;
6769 adapter->pdev = pdev;
6770 hw = &adapter->hw;
6771 hw->back = adapter;
6772 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
6773
6774 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
6775 pci_resource_len(pdev, 0));
6776 if (!hw->hw_addr) {
6777 err = -EIO;
6778 goto err_ioremap;
6779 }
6780
6781 for (i = 1; i <= 5; i++) {
6782 if (pci_resource_len(pdev, i) == 0)
6783 continue;
6784 }
6785
6786 netdev->netdev_ops = &ixgbe_netdev_ops;
6787 ixgbe_set_ethtool_ops(netdev);
6788 netdev->watchdog_timeo = 5 * HZ;
6789 strcpy(netdev->name, pci_name(pdev));
6790
6791 adapter->bd_number = cards_found;
6792
6793 /* Setup hw api */
6794 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
6795 hw->mac.type = ii->mac;
6796
6797 /* EEPROM */
6798 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
6799 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
6800 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
6801 if (!(eec & (1 << 8)))
6802 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
6803
6804 /* PHY */
6805 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
6806 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
6807 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
6808 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
6809 hw->phy.mdio.mmds = 0;
6810 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
6811 hw->phy.mdio.dev = netdev;
6812 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
6813 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
6814
6815 /* set up this timer and work struct before calling get_invariants
6816 * which might start the timer
6817 */
6818 init_timer(&adapter->sfp_timer);
6819 adapter->sfp_timer.function = ixgbe_sfp_timer;
6820 adapter->sfp_timer.data = (unsigned long) adapter;
6821
6822 INIT_WORK(&adapter->sfp_task, ixgbe_sfp_task);
6823
6824 /* multispeed fiber has its own tasklet, called from GPI SDP1 context */
6825 INIT_WORK(&adapter->multispeed_fiber_task, ixgbe_multispeed_fiber_task);
6826
6827 /* a new SFP+ module arrival, called from GPI SDP2 context */
6828 INIT_WORK(&adapter->sfp_config_module_task,
6829 ixgbe_sfp_config_module_task);
6830
6831 ii->get_invariants(hw);
6832
6833 /* setup the private structure */
6834 err = ixgbe_sw_init(adapter);
6835 if (err)
6836 goto err_sw_init;
6837
6838 /* Make it possible the adapter to be woken up via WOL */
6839 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
6840 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
6841
6842 /*
6843 * If there is a fan on this device and it has failed log the
6844 * failure.
6845 */
6846 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
6847 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
6848 if (esdp & IXGBE_ESDP_SDP1)
6849 e_crit(probe, "Fan has stopped, replace the adapter\n");
6850 }
6851
6852 /* reset_hw fills in the perm_addr as well */
6853 hw->phy.reset_if_overtemp = true;
6854 err = hw->mac.ops.reset_hw(hw);
6855 hw->phy.reset_if_overtemp = false;
6856 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
6857 hw->mac.type == ixgbe_mac_82598EB) {
6858 /*
6859 * Start a kernel thread to watch for a module to arrive.
6860 * Only do this for 82598, since 82599 will generate
6861 * interrupts on module arrival.
6862 */
6863 set_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
6864 mod_timer(&adapter->sfp_timer,
6865 round_jiffies(jiffies + (2 * HZ)));
6866 err = 0;
6867 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
6868 e_dev_err("failed to initialize because an unsupported SFP+ "
6869 "module type was detected.\n");
6870 e_dev_err("Reload the driver after installing a supported "
6871 "module.\n");
6872 goto err_sw_init;
6873 } else if (err) {
6874 e_dev_err("HW Init failed: %d\n", err);
6875 goto err_sw_init;
6876 }
6877
6878 ixgbe_probe_vf(adapter, ii);
6879
6880 netdev->features = NETIF_F_SG |
6881 NETIF_F_IP_CSUM |
6882 NETIF_F_HW_VLAN_TX |
6883 NETIF_F_HW_VLAN_RX |
6884 NETIF_F_HW_VLAN_FILTER;
6885
6886 netdev->features |= NETIF_F_IPV6_CSUM;
6887 netdev->features |= NETIF_F_TSO;
6888 netdev->features |= NETIF_F_TSO6;
6889 netdev->features |= NETIF_F_GRO;
6890
6891 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
6892 netdev->features |= NETIF_F_SCTP_CSUM;
6893
6894 netdev->vlan_features |= NETIF_F_TSO;
6895 netdev->vlan_features |= NETIF_F_TSO6;
6896 netdev->vlan_features |= NETIF_F_IP_CSUM;
6897 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
6898 netdev->vlan_features |= NETIF_F_SG;
6899
6900 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6901 adapter->flags &= ~(IXGBE_FLAG_RSS_ENABLED |
6902 IXGBE_FLAG_DCB_ENABLED);
6903 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
6904 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
6905
6906 #ifdef CONFIG_IXGBE_DCB
6907 netdev->dcbnl_ops = &dcbnl_ops;
6908 #endif
6909
6910 #ifdef IXGBE_FCOE
6911 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
6912 if (hw->mac.ops.get_device_caps) {
6913 hw->mac.ops.get_device_caps(hw, &device_caps);
6914 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
6915 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
6916 }
6917 }
6918 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
6919 netdev->vlan_features |= NETIF_F_FCOE_CRC;
6920 netdev->vlan_features |= NETIF_F_FSO;
6921 netdev->vlan_features |= NETIF_F_FCOE_MTU;
6922 }
6923 #endif /* IXGBE_FCOE */
6924 if (pci_using_dac) {
6925 netdev->features |= NETIF_F_HIGHDMA;
6926 netdev->vlan_features |= NETIF_F_HIGHDMA;
6927 }
6928
6929 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
6930 netdev->features |= NETIF_F_LRO;
6931
6932 /* make sure the EEPROM is good */
6933 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
6934 e_dev_err("The EEPROM Checksum Is Not Valid\n");
6935 err = -EIO;
6936 goto err_eeprom;
6937 }
6938
6939 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
6940 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
6941
6942 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
6943 e_dev_err("invalid MAC address\n");
6944 err = -EIO;
6945 goto err_eeprom;
6946 }
6947
6948 /* power down the optics */
6949 if (hw->phy.multispeed_fiber)
6950 hw->mac.ops.disable_tx_laser(hw);
6951
6952 init_timer(&adapter->watchdog_timer);
6953 adapter->watchdog_timer.function = ixgbe_watchdog;
6954 adapter->watchdog_timer.data = (unsigned long)adapter;
6955
6956 INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
6957 INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
6958
6959 err = ixgbe_init_interrupt_scheme(adapter);
6960 if (err)
6961 goto err_sw_init;
6962
6963 switch (pdev->device) {
6964 case IXGBE_DEV_ID_82599_KX4:
6965 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
6966 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
6967 break;
6968 default:
6969 adapter->wol = 0;
6970 break;
6971 }
6972 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
6973
6974 /* pick up the PCI bus settings for reporting later */
6975 hw->mac.ops.get_bus_info(hw);
6976
6977 /* print bus type/speed/width info */
6978 e_dev_info("(PCI Express:%s:%s) %pM\n",
6979 (hw->bus.speed == ixgbe_bus_speed_5000 ? "5.0Gb/s" :
6980 hw->bus.speed == ixgbe_bus_speed_2500 ? "2.5Gb/s" :
6981 "Unknown"),
6982 (hw->bus.width == ixgbe_bus_width_pcie_x8 ? "Width x8" :
6983 hw->bus.width == ixgbe_bus_width_pcie_x4 ? "Width x4" :
6984 hw->bus.width == ixgbe_bus_width_pcie_x1 ? "Width x1" :
6985 "Unknown"),
6986 netdev->dev_addr);
6987 ixgbe_read_pba_num_generic(hw, &part_num);
6988 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
6989 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, "
6990 "PBA No: %06x-%03x\n",
6991 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
6992 (part_num >> 8), (part_num & 0xff));
6993 else
6994 e_dev_info("MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
6995 hw->mac.type, hw->phy.type,
6996 (part_num >> 8), (part_num & 0xff));
6997
6998 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
6999 e_dev_warn("PCI-Express bandwidth available for this card is "
7000 "not sufficient for optimal performance.\n");
7001 e_dev_warn("For optimal performance a x8 PCI-Express slot "
7002 "is required.\n");
7003 }
7004
7005 /* save off EEPROM version number */
7006 hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
7007
7008 /* reset the hardware with the new settings */
7009 err = hw->mac.ops.start_hw(hw);
7010
7011 if (err == IXGBE_ERR_EEPROM_VERSION) {
7012 /* We are running on a pre-production device, log a warning */
7013 e_dev_warn("This device is a pre-production adapter/LOM. "
7014 "Please be aware there may be issues associated "
7015 "with your hardware. If you are experiencing "
7016 "problems please contact your Intel or hardware "
7017 "representative who provided you with this "
7018 "hardware.\n");
7019 }
7020 strcpy(netdev->name, "eth%d");
7021 err = register_netdev(netdev);
7022 if (err)
7023 goto err_register;
7024
7025 /* carrier off reporting is important to ethtool even BEFORE open */
7026 netif_carrier_off(netdev);
7027
7028 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
7029 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
7030 INIT_WORK(&adapter->fdir_reinit_task, ixgbe_fdir_reinit_task);
7031
7032 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
7033 INIT_WORK(&adapter->check_overtemp_task,
7034 ixgbe_check_overtemp_task);
7035 #ifdef CONFIG_IXGBE_DCA
7036 if (dca_add_requester(&pdev->dev) == 0) {
7037 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
7038 ixgbe_setup_dca(adapter);
7039 }
7040 #endif
7041 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
7042 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
7043 for (i = 0; i < adapter->num_vfs; i++)
7044 ixgbe_vf_configuration(pdev, (i | 0x10000000));
7045 }
7046
7047 /* add san mac addr to netdev */
7048 ixgbe_add_sanmac_netdev(netdev);
7049
7050 e_dev_info("Intel(R) 10 Gigabit Network Connection\n");
7051 cards_found++;
7052 return 0;
7053
7054 err_register:
7055 ixgbe_release_hw_control(adapter);
7056 ixgbe_clear_interrupt_scheme(adapter);
7057 err_sw_init:
7058 err_eeprom:
7059 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7060 ixgbe_disable_sriov(adapter);
7061 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
7062 del_timer_sync(&adapter->sfp_timer);
7063 cancel_work_sync(&adapter->sfp_task);
7064 cancel_work_sync(&adapter->multispeed_fiber_task);
7065 cancel_work_sync(&adapter->sfp_config_module_task);
7066 iounmap(hw->hw_addr);
7067 err_ioremap:
7068 free_netdev(netdev);
7069 err_alloc_etherdev:
7070 pci_release_selected_regions(pdev,
7071 pci_select_bars(pdev, IORESOURCE_MEM));
7072 err_pci_reg:
7073 err_dma:
7074 pci_disable_device(pdev);
7075 return err;
7076 }
7077
7078 /**
7079 * ixgbe_remove - Device Removal Routine
7080 * @pdev: PCI device information struct
7081 *
7082 * ixgbe_remove is called by the PCI subsystem to alert the driver
7083 * that it should release a PCI device. The could be caused by a
7084 * Hot-Plug event, or because the driver is going to be removed from
7085 * memory.
7086 **/
7087 static void __devexit ixgbe_remove(struct pci_dev *pdev)
7088 {
7089 struct net_device *netdev = pci_get_drvdata(pdev);
7090 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7091
7092 set_bit(__IXGBE_DOWN, &adapter->state);
7093 /* clear the module not found bit to make sure the worker won't
7094 * reschedule
7095 */
7096 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
7097 del_timer_sync(&adapter->watchdog_timer);
7098
7099 del_timer_sync(&adapter->sfp_timer);
7100 cancel_work_sync(&adapter->watchdog_task);
7101 cancel_work_sync(&adapter->sfp_task);
7102 cancel_work_sync(&adapter->multispeed_fiber_task);
7103 cancel_work_sync(&adapter->sfp_config_module_task);
7104 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
7105 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
7106 cancel_work_sync(&adapter->fdir_reinit_task);
7107 flush_scheduled_work();
7108
7109 #ifdef CONFIG_IXGBE_DCA
7110 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
7111 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
7112 dca_remove_requester(&pdev->dev);
7113 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
7114 }
7115
7116 #endif
7117 #ifdef IXGBE_FCOE
7118 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
7119 ixgbe_cleanup_fcoe(adapter);
7120
7121 #endif /* IXGBE_FCOE */
7122
7123 /* remove the added san mac */
7124 ixgbe_del_sanmac_netdev(netdev);
7125
7126 if (netdev->reg_state == NETREG_REGISTERED)
7127 unregister_netdev(netdev);
7128
7129 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7130 ixgbe_disable_sriov(adapter);
7131
7132 ixgbe_clear_interrupt_scheme(adapter);
7133
7134 ixgbe_release_hw_control(adapter);
7135
7136 iounmap(adapter->hw.hw_addr);
7137 pci_release_selected_regions(pdev, pci_select_bars(pdev,
7138 IORESOURCE_MEM));
7139
7140 e_dev_info("complete\n");
7141
7142 free_netdev(netdev);
7143
7144 pci_disable_pcie_error_reporting(pdev);
7145
7146 pci_disable_device(pdev);
7147 }
7148
7149 /**
7150 * ixgbe_io_error_detected - called when PCI error is detected
7151 * @pdev: Pointer to PCI device
7152 * @state: The current pci connection state
7153 *
7154 * This function is called after a PCI bus error affecting
7155 * this device has been detected.
7156 */
7157 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
7158 pci_channel_state_t state)
7159 {
7160 struct net_device *netdev = pci_get_drvdata(pdev);
7161 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7162
7163 netif_device_detach(netdev);
7164
7165 if (state == pci_channel_io_perm_failure)
7166 return PCI_ERS_RESULT_DISCONNECT;
7167
7168 if (netif_running(netdev))
7169 ixgbe_down(adapter);
7170 pci_disable_device(pdev);
7171
7172 /* Request a slot reset. */
7173 return PCI_ERS_RESULT_NEED_RESET;
7174 }
7175
7176 /**
7177 * ixgbe_io_slot_reset - called after the pci bus has been reset.
7178 * @pdev: Pointer to PCI device
7179 *
7180 * Restart the card from scratch, as if from a cold-boot.
7181 */
7182 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
7183 {
7184 struct net_device *netdev = pci_get_drvdata(pdev);
7185 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7186 pci_ers_result_t result;
7187 int err;
7188
7189 if (pci_enable_device_mem(pdev)) {
7190 e_err(probe, "Cannot re-enable PCI device after reset.\n");
7191 result = PCI_ERS_RESULT_DISCONNECT;
7192 } else {
7193 pci_set_master(pdev);
7194 pci_restore_state(pdev);
7195 pci_save_state(pdev);
7196
7197 pci_wake_from_d3(pdev, false);
7198
7199 ixgbe_reset(adapter);
7200 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7201 result = PCI_ERS_RESULT_RECOVERED;
7202 }
7203
7204 err = pci_cleanup_aer_uncorrect_error_status(pdev);
7205 if (err) {
7206 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
7207 "failed 0x%0x\n", err);
7208 /* non-fatal, continue */
7209 }
7210
7211 return result;
7212 }
7213
7214 /**
7215 * ixgbe_io_resume - called when traffic can start flowing again.
7216 * @pdev: Pointer to PCI device
7217 *
7218 * This callback is called when the error recovery driver tells us that
7219 * its OK to resume normal operation.
7220 */
7221 static void ixgbe_io_resume(struct pci_dev *pdev)
7222 {
7223 struct net_device *netdev = pci_get_drvdata(pdev);
7224 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7225
7226 if (netif_running(netdev)) {
7227 if (ixgbe_up(adapter)) {
7228 e_info(probe, "ixgbe_up failed after reset\n");
7229 return;
7230 }
7231 }
7232
7233 netif_device_attach(netdev);
7234 }
7235
7236 static struct pci_error_handlers ixgbe_err_handler = {
7237 .error_detected = ixgbe_io_error_detected,
7238 .slot_reset = ixgbe_io_slot_reset,
7239 .resume = ixgbe_io_resume,
7240 };
7241
7242 static struct pci_driver ixgbe_driver = {
7243 .name = ixgbe_driver_name,
7244 .id_table = ixgbe_pci_tbl,
7245 .probe = ixgbe_probe,
7246 .remove = __devexit_p(ixgbe_remove),
7247 #ifdef CONFIG_PM
7248 .suspend = ixgbe_suspend,
7249 .resume = ixgbe_resume,
7250 #endif
7251 .shutdown = ixgbe_shutdown,
7252 .err_handler = &ixgbe_err_handler
7253 };
7254
7255 /**
7256 * ixgbe_init_module - Driver Registration Routine
7257 *
7258 * ixgbe_init_module is the first routine called when the driver is
7259 * loaded. All it does is register with the PCI subsystem.
7260 **/
7261 static int __init ixgbe_init_module(void)
7262 {
7263 int ret;
7264 pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
7265 pr_info("%s\n", ixgbe_copyright);
7266
7267 #ifdef CONFIG_IXGBE_DCA
7268 dca_register_notify(&dca_notifier);
7269 #endif
7270
7271 ret = pci_register_driver(&ixgbe_driver);
7272 return ret;
7273 }
7274
7275 module_init(ixgbe_init_module);
7276
7277 /**
7278 * ixgbe_exit_module - Driver Exit Cleanup Routine
7279 *
7280 * ixgbe_exit_module is called just before the driver is removed
7281 * from memory.
7282 **/
7283 static void __exit ixgbe_exit_module(void)
7284 {
7285 #ifdef CONFIG_IXGBE_DCA
7286 dca_unregister_notify(&dca_notifier);
7287 #endif
7288 pci_unregister_driver(&ixgbe_driver);
7289 rcu_barrier(); /* Wait for completion of call_rcu()'s */
7290 }
7291
7292 #ifdef CONFIG_IXGBE_DCA
7293 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
7294 void *p)
7295 {
7296 int ret_val;
7297
7298 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
7299 __ixgbe_notify_dca);
7300
7301 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
7302 }
7303
7304 #endif /* CONFIG_IXGBE_DCA */
7305
7306 /**
7307 * ixgbe_get_hw_dev return device
7308 * used by hardware layer to print debugging information
7309 **/
7310 struct net_device *ixgbe_get_hw_dev(struct ixgbe_hw *hw)
7311 {
7312 struct ixgbe_adapter *adapter = hw->back;
7313 return adapter->netdev;
7314 }
7315
7316 module_exit(ixgbe_exit_module);
7317
7318 /* ixgbe_main.c */
Linux with added FPC-III support