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[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / ixgbe / ixgbe_main.c
1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2010 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26 *******************************************************************************/
27
28 #include <linux/types.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/netdevice.h>
32 #include <linux/vmalloc.h>
33 #include <linux/string.h>
34 #include <linux/in.h>
35 #include <linux/ip.h>
36 #include <linux/tcp.h>
37 #include <linux/pkt_sched.h>
38 #include <linux/ipv6.h>
39 #include <linux/slab.h>
40 #include <net/checksum.h>
41 #include <net/ip6_checksum.h>
42 #include <linux/ethtool.h>
43 #include <linux/if_vlan.h>
44 #include <scsi/fc/fc_fcoe.h>
45
46 #include "ixgbe.h"
47 #include "ixgbe_common.h"
48 #include "ixgbe_dcb_82599.h"
49 #include "ixgbe_sriov.h"
50
51 char ixgbe_driver_name[] = "ixgbe";
52 static const char ixgbe_driver_string[] =
53 "Intel(R) 10 Gigabit PCI Express Network Driver";
54
55 #define DRV_VERSION "3.0.12-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 [board_X540] = &ixgbe_X540_info,
63 };
64
65 /* ixgbe_pci_tbl - PCI Device ID Table
66 *
67 * Wildcard entries (PCI_ANY_ID) should come last
68 * Last entry must be all 0s
69 *
70 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
71 * Class, Class Mask, private data (not used) }
72 */
73 static DEFINE_PCI_DEVICE_TABLE(ixgbe_pci_tbl) = {
74 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598),
75 board_82598 },
76 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
77 board_82598 },
78 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
79 board_82598 },
80 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT),
81 board_82598 },
82 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2),
83 board_82598 },
84 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
85 board_82598 },
86 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT),
87 board_82598 },
88 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT),
89 board_82598 },
90 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM),
91 board_82598 },
92 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR),
93 board_82598 },
94 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM),
95 board_82598 },
96 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX),
97 board_82598 },
98 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4),
99 board_82599 },
100 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM),
101 board_82599 },
102 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR),
103 board_82599 },
104 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP),
105 board_82599 },
106 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM),
107 board_82599 },
108 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ),
109 board_82599 },
110 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4),
111 board_82599 },
112 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM),
113 board_82599 },
114 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE),
115 board_82599 },
116 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T),
117 board_82599 },
118
119 /* required last entry */
120 {0, }
121 };
122 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
123
124 #ifdef CONFIG_IXGBE_DCA
125 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
126 void *p);
127 static struct notifier_block dca_notifier = {
128 .notifier_call = ixgbe_notify_dca,
129 .next = NULL,
130 .priority = 0
131 };
132 #endif
133
134 #ifdef CONFIG_PCI_IOV
135 static unsigned int max_vfs;
136 module_param(max_vfs, uint, 0);
137 MODULE_PARM_DESC(max_vfs,
138 "Maximum number of virtual functions to allocate per physical function");
139 #endif /* CONFIG_PCI_IOV */
140
141 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
142 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
143 MODULE_LICENSE("GPL");
144 MODULE_VERSION(DRV_VERSION);
145
146 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
147
148 static inline void ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
149 {
150 struct ixgbe_hw *hw = &adapter->hw;
151 u32 gcr;
152 u32 gpie;
153 u32 vmdctl;
154
155 #ifdef CONFIG_PCI_IOV
156 /* disable iov and allow time for transactions to clear */
157 pci_disable_sriov(adapter->pdev);
158 #endif
159
160 /* turn off device IOV mode */
161 gcr = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
162 gcr &= ~(IXGBE_GCR_EXT_SRIOV);
163 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr);
164 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
165 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
166 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
167
168 /* set default pool back to 0 */
169 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
170 vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
171 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
172
173 /* take a breather then clean up driver data */
174 msleep(100);
175
176 kfree(adapter->vfinfo);
177 adapter->vfinfo = NULL;
178
179 adapter->num_vfs = 0;
180 adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
181 }
182
183 struct ixgbe_reg_info {
184 u32 ofs;
185 char *name;
186 };
187
188 static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {
189
190 /* General Registers */
191 {IXGBE_CTRL, "CTRL"},
192 {IXGBE_STATUS, "STATUS"},
193 {IXGBE_CTRL_EXT, "CTRL_EXT"},
194
195 /* Interrupt Registers */
196 {IXGBE_EICR, "EICR"},
197
198 /* RX Registers */
199 {IXGBE_SRRCTL(0), "SRRCTL"},
200 {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
201 {IXGBE_RDLEN(0), "RDLEN"},
202 {IXGBE_RDH(0), "RDH"},
203 {IXGBE_RDT(0), "RDT"},
204 {IXGBE_RXDCTL(0), "RXDCTL"},
205 {IXGBE_RDBAL(0), "RDBAL"},
206 {IXGBE_RDBAH(0), "RDBAH"},
207
208 /* TX Registers */
209 {IXGBE_TDBAL(0), "TDBAL"},
210 {IXGBE_TDBAH(0), "TDBAH"},
211 {IXGBE_TDLEN(0), "TDLEN"},
212 {IXGBE_TDH(0), "TDH"},
213 {IXGBE_TDT(0), "TDT"},
214 {IXGBE_TXDCTL(0), "TXDCTL"},
215
216 /* List Terminator */
217 {}
218 };
219
220
221 /*
222 * ixgbe_regdump - register printout routine
223 */
224 static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
225 {
226 int i = 0, j = 0;
227 char rname[16];
228 u32 regs[64];
229
230 switch (reginfo->ofs) {
231 case IXGBE_SRRCTL(0):
232 for (i = 0; i < 64; i++)
233 regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
234 break;
235 case IXGBE_DCA_RXCTRL(0):
236 for (i = 0; i < 64; i++)
237 regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
238 break;
239 case IXGBE_RDLEN(0):
240 for (i = 0; i < 64; i++)
241 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
242 break;
243 case IXGBE_RDH(0):
244 for (i = 0; i < 64; i++)
245 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
246 break;
247 case IXGBE_RDT(0):
248 for (i = 0; i < 64; i++)
249 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
250 break;
251 case IXGBE_RXDCTL(0):
252 for (i = 0; i < 64; i++)
253 regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
254 break;
255 case IXGBE_RDBAL(0):
256 for (i = 0; i < 64; i++)
257 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
258 break;
259 case IXGBE_RDBAH(0):
260 for (i = 0; i < 64; i++)
261 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
262 break;
263 case IXGBE_TDBAL(0):
264 for (i = 0; i < 64; i++)
265 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
266 break;
267 case IXGBE_TDBAH(0):
268 for (i = 0; i < 64; i++)
269 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
270 break;
271 case IXGBE_TDLEN(0):
272 for (i = 0; i < 64; i++)
273 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
274 break;
275 case IXGBE_TDH(0):
276 for (i = 0; i < 64; i++)
277 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
278 break;
279 case IXGBE_TDT(0):
280 for (i = 0; i < 64; i++)
281 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
282 break;
283 case IXGBE_TXDCTL(0):
284 for (i = 0; i < 64; i++)
285 regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
286 break;
287 default:
288 pr_info("%-15s %08x\n", reginfo->name,
289 IXGBE_READ_REG(hw, reginfo->ofs));
290 return;
291 }
292
293 for (i = 0; i < 8; i++) {
294 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7);
295 pr_err("%-15s", rname);
296 for (j = 0; j < 8; j++)
297 pr_cont(" %08x", regs[i*8+j]);
298 pr_cont("\n");
299 }
300
301 }
302
303 /*
304 * ixgbe_dump - Print registers, tx-rings and rx-rings
305 */
306 static void ixgbe_dump(struct ixgbe_adapter *adapter)
307 {
308 struct net_device *netdev = adapter->netdev;
309 struct ixgbe_hw *hw = &adapter->hw;
310 struct ixgbe_reg_info *reginfo;
311 int n = 0;
312 struct ixgbe_ring *tx_ring;
313 struct ixgbe_tx_buffer *tx_buffer_info;
314 union ixgbe_adv_tx_desc *tx_desc;
315 struct my_u0 { u64 a; u64 b; } *u0;
316 struct ixgbe_ring *rx_ring;
317 union ixgbe_adv_rx_desc *rx_desc;
318 struct ixgbe_rx_buffer *rx_buffer_info;
319 u32 staterr;
320 int i = 0;
321
322 if (!netif_msg_hw(adapter))
323 return;
324
325 /* Print netdevice Info */
326 if (netdev) {
327 dev_info(&adapter->pdev->dev, "Net device Info\n");
328 pr_info("Device Name state "
329 "trans_start last_rx\n");
330 pr_info("%-15s %016lX %016lX %016lX\n",
331 netdev->name,
332 netdev->state,
333 netdev->trans_start,
334 netdev->last_rx);
335 }
336
337 /* Print Registers */
338 dev_info(&adapter->pdev->dev, "Register Dump\n");
339 pr_info(" Register Name Value\n");
340 for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
341 reginfo->name; reginfo++) {
342 ixgbe_regdump(hw, reginfo);
343 }
344
345 /* Print TX Ring Summary */
346 if (!netdev || !netif_running(netdev))
347 goto exit;
348
349 dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
350 pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n");
351 for (n = 0; n < adapter->num_tx_queues; n++) {
352 tx_ring = adapter->tx_ring[n];
353 tx_buffer_info =
354 &tx_ring->tx_buffer_info[tx_ring->next_to_clean];
355 pr_info(" %5d %5X %5X %016llX %04X %3X %016llX\n",
356 n, tx_ring->next_to_use, tx_ring->next_to_clean,
357 (u64)tx_buffer_info->dma,
358 tx_buffer_info->length,
359 tx_buffer_info->next_to_watch,
360 (u64)tx_buffer_info->time_stamp);
361 }
362
363 /* Print TX Rings */
364 if (!netif_msg_tx_done(adapter))
365 goto rx_ring_summary;
366
367 dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
368
369 /* Transmit Descriptor Formats
370 *
371 * Advanced Transmit Descriptor
372 * +--------------------------------------------------------------+
373 * 0 | Buffer Address [63:0] |
374 * +--------------------------------------------------------------+
375 * 8 | PAYLEN | PORTS | IDX | STA | DCMD |DTYP | RSV | DTALEN |
376 * +--------------------------------------------------------------+
377 * 63 46 45 40 39 36 35 32 31 24 23 20 19 0
378 */
379
380 for (n = 0; n < adapter->num_tx_queues; n++) {
381 tx_ring = adapter->tx_ring[n];
382 pr_info("------------------------------------\n");
383 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index);
384 pr_info("------------------------------------\n");
385 pr_info("T [desc] [address 63:0 ] "
386 "[PlPOIdStDDt Ln] [bi->dma ] "
387 "leng ntw timestamp bi->skb\n");
388
389 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
390 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
391 tx_buffer_info = &tx_ring->tx_buffer_info[i];
392 u0 = (struct my_u0 *)tx_desc;
393 pr_info("T [0x%03X] %016llX %016llX %016llX"
394 " %04X %3X %016llX %p", i,
395 le64_to_cpu(u0->a),
396 le64_to_cpu(u0->b),
397 (u64)tx_buffer_info->dma,
398 tx_buffer_info->length,
399 tx_buffer_info->next_to_watch,
400 (u64)tx_buffer_info->time_stamp,
401 tx_buffer_info->skb);
402 if (i == tx_ring->next_to_use &&
403 i == tx_ring->next_to_clean)
404 pr_cont(" NTC/U\n");
405 else if (i == tx_ring->next_to_use)
406 pr_cont(" NTU\n");
407 else if (i == tx_ring->next_to_clean)
408 pr_cont(" NTC\n");
409 else
410 pr_cont("\n");
411
412 if (netif_msg_pktdata(adapter) &&
413 tx_buffer_info->dma != 0)
414 print_hex_dump(KERN_INFO, "",
415 DUMP_PREFIX_ADDRESS, 16, 1,
416 phys_to_virt(tx_buffer_info->dma),
417 tx_buffer_info->length, true);
418 }
419 }
420
421 /* Print RX Rings Summary */
422 rx_ring_summary:
423 dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
424 pr_info("Queue [NTU] [NTC]\n");
425 for (n = 0; n < adapter->num_rx_queues; n++) {
426 rx_ring = adapter->rx_ring[n];
427 pr_info("%5d %5X %5X\n",
428 n, rx_ring->next_to_use, rx_ring->next_to_clean);
429 }
430
431 /* Print RX Rings */
432 if (!netif_msg_rx_status(adapter))
433 goto exit;
434
435 dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
436
437 /* Advanced Receive Descriptor (Read) Format
438 * 63 1 0
439 * +-----------------------------------------------------+
440 * 0 | Packet Buffer Address [63:1] |A0/NSE|
441 * +----------------------------------------------+------+
442 * 8 | Header Buffer Address [63:1] | DD |
443 * +-----------------------------------------------------+
444 *
445 *
446 * Advanced Receive Descriptor (Write-Back) Format
447 *
448 * 63 48 47 32 31 30 21 20 16 15 4 3 0
449 * +------------------------------------------------------+
450 * 0 | Packet IP |SPH| HDR_LEN | RSV|Packet| RSS |
451 * | Checksum Ident | | | | Type | Type |
452 * +------------------------------------------------------+
453 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
454 * +------------------------------------------------------+
455 * 63 48 47 32 31 20 19 0
456 */
457 for (n = 0; n < adapter->num_rx_queues; n++) {
458 rx_ring = adapter->rx_ring[n];
459 pr_info("------------------------------------\n");
460 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index);
461 pr_info("------------------------------------\n");
462 pr_info("R [desc] [ PktBuf A0] "
463 "[ HeadBuf DD] [bi->dma ] [bi->skb] "
464 "<-- Adv Rx Read format\n");
465 pr_info("RWB[desc] [PcsmIpSHl PtRs] "
466 "[vl er S cks ln] ---------------- [bi->skb] "
467 "<-- Adv Rx Write-Back format\n");
468
469 for (i = 0; i < rx_ring->count; i++) {
470 rx_buffer_info = &rx_ring->rx_buffer_info[i];
471 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
472 u0 = (struct my_u0 *)rx_desc;
473 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
474 if (staterr & IXGBE_RXD_STAT_DD) {
475 /* Descriptor Done */
476 pr_info("RWB[0x%03X] %016llX "
477 "%016llX ---------------- %p", i,
478 le64_to_cpu(u0->a),
479 le64_to_cpu(u0->b),
480 rx_buffer_info->skb);
481 } else {
482 pr_info("R [0x%03X] %016llX "
483 "%016llX %016llX %p", i,
484 le64_to_cpu(u0->a),
485 le64_to_cpu(u0->b),
486 (u64)rx_buffer_info->dma,
487 rx_buffer_info->skb);
488
489 if (netif_msg_pktdata(adapter)) {
490 print_hex_dump(KERN_INFO, "",
491 DUMP_PREFIX_ADDRESS, 16, 1,
492 phys_to_virt(rx_buffer_info->dma),
493 rx_ring->rx_buf_len, true);
494
495 if (rx_ring->rx_buf_len
496 < IXGBE_RXBUFFER_2048)
497 print_hex_dump(KERN_INFO, "",
498 DUMP_PREFIX_ADDRESS, 16, 1,
499 phys_to_virt(
500 rx_buffer_info->page_dma +
501 rx_buffer_info->page_offset
502 ),
503 PAGE_SIZE/2, true);
504 }
505 }
506
507 if (i == rx_ring->next_to_use)
508 pr_cont(" NTU\n");
509 else if (i == rx_ring->next_to_clean)
510 pr_cont(" NTC\n");
511 else
512 pr_cont("\n");
513
514 }
515 }
516
517 exit:
518 return;
519 }
520
521 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
522 {
523 u32 ctrl_ext;
524
525 /* Let firmware take over control of h/w */
526 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
527 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
528 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
529 }
530
531 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
532 {
533 u32 ctrl_ext;
534
535 /* Let firmware know the driver has taken over */
536 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
537 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
538 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
539 }
540
541 /*
542 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
543 * @adapter: pointer to adapter struct
544 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
545 * @queue: queue to map the corresponding interrupt to
546 * @msix_vector: the vector to map to the corresponding queue
547 *
548 */
549 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
550 u8 queue, u8 msix_vector)
551 {
552 u32 ivar, index;
553 struct ixgbe_hw *hw = &adapter->hw;
554 switch (hw->mac.type) {
555 case ixgbe_mac_82598EB:
556 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
557 if (direction == -1)
558 direction = 0;
559 index = (((direction * 64) + queue) >> 2) & 0x1F;
560 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
561 ivar &= ~(0xFF << (8 * (queue & 0x3)));
562 ivar |= (msix_vector << (8 * (queue & 0x3)));
563 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
564 break;
565 case ixgbe_mac_82599EB:
566 case ixgbe_mac_X540:
567 if (direction == -1) {
568 /* other causes */
569 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
570 index = ((queue & 1) * 8);
571 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
572 ivar &= ~(0xFF << index);
573 ivar |= (msix_vector << index);
574 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
575 break;
576 } else {
577 /* tx or rx causes */
578 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
579 index = ((16 * (queue & 1)) + (8 * direction));
580 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
581 ivar &= ~(0xFF << index);
582 ivar |= (msix_vector << index);
583 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
584 break;
585 }
586 default:
587 break;
588 }
589 }
590
591 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
592 u64 qmask)
593 {
594 u32 mask;
595
596 switch (adapter->hw.mac.type) {
597 case ixgbe_mac_82598EB:
598 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
599 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
600 break;
601 case ixgbe_mac_82599EB:
602 case ixgbe_mac_X540:
603 mask = (qmask & 0xFFFFFFFF);
604 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
605 mask = (qmask >> 32);
606 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
607 break;
608 default:
609 break;
610 }
611 }
612
613 void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *tx_ring,
614 struct ixgbe_tx_buffer *tx_buffer_info)
615 {
616 if (tx_buffer_info->dma) {
617 if (tx_buffer_info->mapped_as_page)
618 dma_unmap_page(tx_ring->dev,
619 tx_buffer_info->dma,
620 tx_buffer_info->length,
621 DMA_TO_DEVICE);
622 else
623 dma_unmap_single(tx_ring->dev,
624 tx_buffer_info->dma,
625 tx_buffer_info->length,
626 DMA_TO_DEVICE);
627 tx_buffer_info->dma = 0;
628 }
629 if (tx_buffer_info->skb) {
630 dev_kfree_skb_any(tx_buffer_info->skb);
631 tx_buffer_info->skb = NULL;
632 }
633 tx_buffer_info->time_stamp = 0;
634 /* tx_buffer_info must be completely set up in the transmit path */
635 }
636
637 /**
638 * ixgbe_dcb_txq_to_tc - convert a reg index to a traffic class
639 * @adapter: driver private struct
640 * @index: reg idx of queue to query (0-127)
641 *
642 * Helper function to determine the traffic index for a paticular
643 * register index.
644 *
645 * Returns : a tc index for use in range 0-7, or 0-3
646 */
647 u8 ixgbe_dcb_txq_to_tc(struct ixgbe_adapter *adapter, u8 reg_idx)
648 {
649 int tc = -1;
650 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
651
652 /* if DCB is not enabled the queues have no TC */
653 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
654 return tc;
655
656 /* check valid range */
657 if (reg_idx >= adapter->hw.mac.max_tx_queues)
658 return tc;
659
660 switch (adapter->hw.mac.type) {
661 case ixgbe_mac_82598EB:
662 tc = reg_idx >> 2;
663 break;
664 default:
665 if (dcb_i != 4 && dcb_i != 8)
666 break;
667
668 /* if VMDq is enabled the lowest order bits determine TC */
669 if (adapter->flags & (IXGBE_FLAG_SRIOV_ENABLED |
670 IXGBE_FLAG_VMDQ_ENABLED)) {
671 tc = reg_idx & (dcb_i - 1);
672 break;
673 }
674
675 /*
676 * Convert the reg_idx into the correct TC. This bitmask
677 * targets the last full 32 ring traffic class and assigns
678 * it a value of 1. From there the rest of the rings are
679 * based on shifting the mask further up to include the
680 * reg_idx / 16 and then reg_idx / 8. It assumes dcB_i
681 * will only ever be 8 or 4 and that reg_idx will never
682 * be greater then 128. The code without the power of 2
683 * optimizations would be:
684 * (((reg_idx % 32) + 32) * dcb_i) >> (9 - reg_idx / 32)
685 */
686 tc = ((reg_idx & 0X1F) + 0x20) * dcb_i;
687 tc >>= 9 - (reg_idx >> 5);
688 }
689
690 return tc;
691 }
692
693 static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter)
694 {
695 struct ixgbe_hw *hw = &adapter->hw;
696 struct ixgbe_hw_stats *hwstats = &adapter->stats;
697 u32 data = 0;
698 u32 xoff[8] = {0};
699 int i;
700
701 if ((hw->fc.current_mode == ixgbe_fc_full) ||
702 (hw->fc.current_mode == ixgbe_fc_rx_pause)) {
703 switch (hw->mac.type) {
704 case ixgbe_mac_82598EB:
705 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
706 break;
707 default:
708 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
709 }
710 hwstats->lxoffrxc += data;
711
712 /* refill credits (no tx hang) if we received xoff */
713 if (!data)
714 return;
715
716 for (i = 0; i < adapter->num_tx_queues; i++)
717 clear_bit(__IXGBE_HANG_CHECK_ARMED,
718 &adapter->tx_ring[i]->state);
719 return;
720 } else if (!(adapter->dcb_cfg.pfc_mode_enable))
721 return;
722
723 /* update stats for each tc, only valid with PFC enabled */
724 for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) {
725 switch (hw->mac.type) {
726 case ixgbe_mac_82598EB:
727 xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
728 break;
729 default:
730 xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
731 }
732 hwstats->pxoffrxc[i] += xoff[i];
733 }
734
735 /* disarm tx queues that have received xoff frames */
736 for (i = 0; i < adapter->num_tx_queues; i++) {
737 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
738 u32 tc = ixgbe_dcb_txq_to_tc(adapter, tx_ring->reg_idx);
739
740 if (xoff[tc])
741 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
742 }
743 }
744
745 static u64 ixgbe_get_tx_completed(struct ixgbe_ring *ring)
746 {
747 return ring->tx_stats.completed;
748 }
749
750 static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring)
751 {
752 struct ixgbe_adapter *adapter = netdev_priv(ring->netdev);
753 struct ixgbe_hw *hw = &adapter->hw;
754
755 u32 head = IXGBE_READ_REG(hw, IXGBE_TDH(ring->reg_idx));
756 u32 tail = IXGBE_READ_REG(hw, IXGBE_TDT(ring->reg_idx));
757
758 if (head != tail)
759 return (head < tail) ?
760 tail - head : (tail + ring->count - head);
761
762 return 0;
763 }
764
765 static inline bool ixgbe_check_tx_hang(struct ixgbe_ring *tx_ring)
766 {
767 u32 tx_done = ixgbe_get_tx_completed(tx_ring);
768 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
769 u32 tx_pending = ixgbe_get_tx_pending(tx_ring);
770 bool ret = false;
771
772 clear_check_for_tx_hang(tx_ring);
773
774 /*
775 * Check for a hung queue, but be thorough. This verifies
776 * that a transmit has been completed since the previous
777 * check AND there is at least one packet pending. The
778 * ARMED bit is set to indicate a potential hang. The
779 * bit is cleared if a pause frame is received to remove
780 * false hang detection due to PFC or 802.3x frames. By
781 * requiring this to fail twice we avoid races with
782 * pfc clearing the ARMED bit and conditions where we
783 * run the check_tx_hang logic with a transmit completion
784 * pending but without time to complete it yet.
785 */
786 if ((tx_done_old == tx_done) && tx_pending) {
787 /* make sure it is true for two checks in a row */
788 ret = test_and_set_bit(__IXGBE_HANG_CHECK_ARMED,
789 &tx_ring->state);
790 } else {
791 /* update completed stats and continue */
792 tx_ring->tx_stats.tx_done_old = tx_done;
793 /* reset the countdown */
794 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
795 }
796
797 return ret;
798 }
799
800 #define IXGBE_MAX_TXD_PWR 14
801 #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
802
803 /* Tx Descriptors needed, worst case */
804 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
805 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
806 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
807 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
808
809 static void ixgbe_tx_timeout(struct net_device *netdev);
810
811 /**
812 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
813 * @q_vector: structure containing interrupt and ring information
814 * @tx_ring: tx ring to clean
815 **/
816 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
817 struct ixgbe_ring *tx_ring)
818 {
819 struct ixgbe_adapter *adapter = q_vector->adapter;
820 union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
821 struct ixgbe_tx_buffer *tx_buffer_info;
822 unsigned int total_bytes = 0, total_packets = 0;
823 u16 i, eop, count = 0;
824
825 i = tx_ring->next_to_clean;
826 eop = tx_ring->tx_buffer_info[i].next_to_watch;
827 eop_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
828
829 while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
830 (count < tx_ring->work_limit)) {
831 bool cleaned = false;
832 rmb(); /* read buffer_info after eop_desc */
833 for ( ; !cleaned; count++) {
834 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
835 tx_buffer_info = &tx_ring->tx_buffer_info[i];
836
837 tx_desc->wb.status = 0;
838 cleaned = (i == eop);
839
840 i++;
841 if (i == tx_ring->count)
842 i = 0;
843
844 if (cleaned && tx_buffer_info->skb) {
845 total_bytes += tx_buffer_info->bytecount;
846 total_packets += tx_buffer_info->gso_segs;
847 }
848
849 ixgbe_unmap_and_free_tx_resource(tx_ring,
850 tx_buffer_info);
851 }
852
853 tx_ring->tx_stats.completed++;
854 eop = tx_ring->tx_buffer_info[i].next_to_watch;
855 eop_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
856 }
857
858 tx_ring->next_to_clean = i;
859 tx_ring->total_bytes += total_bytes;
860 tx_ring->total_packets += total_packets;
861 u64_stats_update_begin(&tx_ring->syncp);
862 tx_ring->stats.packets += total_packets;
863 tx_ring->stats.bytes += total_bytes;
864 u64_stats_update_end(&tx_ring->syncp);
865
866 if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring)) {
867 /* schedule immediate reset if we believe we hung */
868 struct ixgbe_hw *hw = &adapter->hw;
869 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
870 e_err(drv, "Detected Tx Unit Hang\n"
871 " Tx Queue <%d>\n"
872 " TDH, TDT <%x>, <%x>\n"
873 " next_to_use <%x>\n"
874 " next_to_clean <%x>\n"
875 "tx_buffer_info[next_to_clean]\n"
876 " time_stamp <%lx>\n"
877 " jiffies <%lx>\n",
878 tx_ring->queue_index,
879 IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)),
880 IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)),
881 tx_ring->next_to_use, eop,
882 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
883
884 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
885
886 e_info(probe,
887 "tx hang %d detected on queue %d, resetting adapter\n",
888 adapter->tx_timeout_count + 1, tx_ring->queue_index);
889
890 /* schedule immediate reset if we believe we hung */
891 ixgbe_tx_timeout(adapter->netdev);
892
893 /* the adapter is about to reset, no point in enabling stuff */
894 return true;
895 }
896
897 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
898 if (unlikely(count && netif_carrier_ok(tx_ring->netdev) &&
899 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
900 /* Make sure that anybody stopping the queue after this
901 * sees the new next_to_clean.
902 */
903 smp_mb();
904 if (__netif_subqueue_stopped(tx_ring->netdev, tx_ring->queue_index) &&
905 !test_bit(__IXGBE_DOWN, &adapter->state)) {
906 netif_wake_subqueue(tx_ring->netdev, tx_ring->queue_index);
907 ++tx_ring->tx_stats.restart_queue;
908 }
909 }
910
911 return count < tx_ring->work_limit;
912 }
913
914 #ifdef CONFIG_IXGBE_DCA
915 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
916 struct ixgbe_ring *rx_ring,
917 int cpu)
918 {
919 struct ixgbe_hw *hw = &adapter->hw;
920 u32 rxctrl;
921 u8 reg_idx = rx_ring->reg_idx;
922
923 rxctrl = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(reg_idx));
924 switch (hw->mac.type) {
925 case ixgbe_mac_82598EB:
926 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
927 rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
928 break;
929 case ixgbe_mac_82599EB:
930 case ixgbe_mac_X540:
931 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
932 rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
933 IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
934 break;
935 default:
936 break;
937 }
938 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
939 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
940 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
941 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_WRO_EN |
942 IXGBE_DCA_RXCTRL_DESC_HSRO_EN);
943 IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl);
944 }
945
946 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
947 struct ixgbe_ring *tx_ring,
948 int cpu)
949 {
950 struct ixgbe_hw *hw = &adapter->hw;
951 u32 txctrl;
952 u8 reg_idx = tx_ring->reg_idx;
953
954 switch (hw->mac.type) {
955 case ixgbe_mac_82598EB:
956 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(reg_idx));
957 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
958 txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
959 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
960 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
961 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(reg_idx), txctrl);
962 break;
963 case ixgbe_mac_82599EB:
964 case ixgbe_mac_X540:
965 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(reg_idx));
966 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
967 txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
968 IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
969 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
970 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
971 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(reg_idx), txctrl);
972 break;
973 default:
974 break;
975 }
976 }
977
978 static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
979 {
980 struct ixgbe_adapter *adapter = q_vector->adapter;
981 int cpu = get_cpu();
982 long r_idx;
983 int i;
984
985 if (q_vector->cpu == cpu)
986 goto out_no_update;
987
988 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
989 for (i = 0; i < q_vector->txr_count; i++) {
990 ixgbe_update_tx_dca(adapter, adapter->tx_ring[r_idx], cpu);
991 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
992 r_idx + 1);
993 }
994
995 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
996 for (i = 0; i < q_vector->rxr_count; i++) {
997 ixgbe_update_rx_dca(adapter, adapter->rx_ring[r_idx], cpu);
998 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
999 r_idx + 1);
1000 }
1001
1002 q_vector->cpu = cpu;
1003 out_no_update:
1004 put_cpu();
1005 }
1006
1007 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
1008 {
1009 int num_q_vectors;
1010 int i;
1011
1012 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
1013 return;
1014
1015 /* always use CB2 mode, difference is masked in the CB driver */
1016 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
1017
1018 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
1019 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1020 else
1021 num_q_vectors = 1;
1022
1023 for (i = 0; i < num_q_vectors; i++) {
1024 adapter->q_vector[i]->cpu = -1;
1025 ixgbe_update_dca(adapter->q_vector[i]);
1026 }
1027 }
1028
1029 static int __ixgbe_notify_dca(struct device *dev, void *data)
1030 {
1031 struct ixgbe_adapter *adapter = dev_get_drvdata(dev);
1032 unsigned long event = *(unsigned long *)data;
1033
1034 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
1035 return 0;
1036
1037 switch (event) {
1038 case DCA_PROVIDER_ADD:
1039 /* if we're already enabled, don't do it again */
1040 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1041 break;
1042 if (dca_add_requester(dev) == 0) {
1043 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
1044 ixgbe_setup_dca(adapter);
1045 break;
1046 }
1047 /* Fall Through since DCA is disabled. */
1048 case DCA_PROVIDER_REMOVE:
1049 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
1050 dca_remove_requester(dev);
1051 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
1052 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
1053 }
1054 break;
1055 }
1056
1057 return 0;
1058 }
1059
1060 #endif /* CONFIG_IXGBE_DCA */
1061 /**
1062 * ixgbe_receive_skb - Send a completed packet up the stack
1063 * @adapter: board private structure
1064 * @skb: packet to send up
1065 * @status: hardware indication of status of receive
1066 * @rx_ring: rx descriptor ring (for a specific queue) to setup
1067 * @rx_desc: rx descriptor
1068 **/
1069 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
1070 struct sk_buff *skb, u8 status,
1071 struct ixgbe_ring *ring,
1072 union ixgbe_adv_rx_desc *rx_desc)
1073 {
1074 struct ixgbe_adapter *adapter = q_vector->adapter;
1075 struct napi_struct *napi = &q_vector->napi;
1076 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
1077 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
1078
1079 if (is_vlan && (tag & VLAN_VID_MASK))
1080 __vlan_hwaccel_put_tag(skb, tag);
1081
1082 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
1083 napi_gro_receive(napi, skb);
1084 else
1085 netif_rx(skb);
1086 }
1087
1088 /**
1089 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
1090 * @adapter: address of board private structure
1091 * @status_err: hardware indication of status of receive
1092 * @skb: skb currently being received and modified
1093 **/
1094 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
1095 union ixgbe_adv_rx_desc *rx_desc,
1096 struct sk_buff *skb)
1097 {
1098 u32 status_err = le32_to_cpu(rx_desc->wb.upper.status_error);
1099
1100 skb_checksum_none_assert(skb);
1101
1102 /* Rx csum disabled */
1103 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
1104 return;
1105
1106 /* if IP and error */
1107 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
1108 (status_err & IXGBE_RXDADV_ERR_IPE)) {
1109 adapter->hw_csum_rx_error++;
1110 return;
1111 }
1112
1113 if (!(status_err & IXGBE_RXD_STAT_L4CS))
1114 return;
1115
1116 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
1117 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1118
1119 /*
1120 * 82599 errata, UDP frames with a 0 checksum can be marked as
1121 * checksum errors.
1122 */
1123 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
1124 (adapter->hw.mac.type == ixgbe_mac_82599EB))
1125 return;
1126
1127 adapter->hw_csum_rx_error++;
1128 return;
1129 }
1130
1131 /* It must be a TCP or UDP packet with a valid checksum */
1132 skb->ip_summed = CHECKSUM_UNNECESSARY;
1133 }
1134
1135 static inline void ixgbe_release_rx_desc(struct ixgbe_ring *rx_ring, u32 val)
1136 {
1137 /*
1138 * Force memory writes to complete before letting h/w
1139 * know there are new descriptors to fetch. (Only
1140 * applicable for weak-ordered memory model archs,
1141 * such as IA-64).
1142 */
1143 wmb();
1144 writel(val, rx_ring->tail);
1145 }
1146
1147 /**
1148 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
1149 * @rx_ring: ring to place buffers on
1150 * @cleaned_count: number of buffers to replace
1151 **/
1152 void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count)
1153 {
1154 union ixgbe_adv_rx_desc *rx_desc;
1155 struct ixgbe_rx_buffer *bi;
1156 struct sk_buff *skb;
1157 u16 i = rx_ring->next_to_use;
1158
1159 /* do nothing if no valid netdev defined */
1160 if (!rx_ring->netdev)
1161 return;
1162
1163 while (cleaned_count--) {
1164 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1165 bi = &rx_ring->rx_buffer_info[i];
1166 skb = bi->skb;
1167
1168 if (!skb) {
1169 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
1170 rx_ring->rx_buf_len);
1171 if (!skb) {
1172 rx_ring->rx_stats.alloc_rx_buff_failed++;
1173 goto no_buffers;
1174 }
1175 /* initialize queue mapping */
1176 skb_record_rx_queue(skb, rx_ring->queue_index);
1177 bi->skb = skb;
1178 }
1179
1180 if (!bi->dma) {
1181 bi->dma = dma_map_single(rx_ring->dev,
1182 skb->data,
1183 rx_ring->rx_buf_len,
1184 DMA_FROM_DEVICE);
1185 if (dma_mapping_error(rx_ring->dev, bi->dma)) {
1186 rx_ring->rx_stats.alloc_rx_buff_failed++;
1187 bi->dma = 0;
1188 goto no_buffers;
1189 }
1190 }
1191
1192 if (ring_is_ps_enabled(rx_ring)) {
1193 if (!bi->page) {
1194 bi->page = netdev_alloc_page(rx_ring->netdev);
1195 if (!bi->page) {
1196 rx_ring->rx_stats.alloc_rx_page_failed++;
1197 goto no_buffers;
1198 }
1199 }
1200
1201 if (!bi->page_dma) {
1202 /* use a half page if we're re-using */
1203 bi->page_offset ^= PAGE_SIZE / 2;
1204 bi->page_dma = dma_map_page(rx_ring->dev,
1205 bi->page,
1206 bi->page_offset,
1207 PAGE_SIZE / 2,
1208 DMA_FROM_DEVICE);
1209 if (dma_mapping_error(rx_ring->dev,
1210 bi->page_dma)) {
1211 rx_ring->rx_stats.alloc_rx_page_failed++;
1212 bi->page_dma = 0;
1213 goto no_buffers;
1214 }
1215 }
1216
1217 /* Refresh the desc even if buffer_addrs didn't change
1218 * because each write-back erases this info. */
1219 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
1220 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
1221 } else {
1222 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
1223 rx_desc->read.hdr_addr = 0;
1224 }
1225
1226 i++;
1227 if (i == rx_ring->count)
1228 i = 0;
1229 }
1230
1231 no_buffers:
1232 if (rx_ring->next_to_use != i) {
1233 rx_ring->next_to_use = i;
1234 ixgbe_release_rx_desc(rx_ring, i);
1235 }
1236 }
1237
1238 static inline u16 ixgbe_get_hlen(union ixgbe_adv_rx_desc *rx_desc)
1239 {
1240 /* HW will not DMA in data larger than the given buffer, even if it
1241 * parses the (NFS, of course) header to be larger. In that case, it
1242 * fills the header buffer and spills the rest into the page.
1243 */
1244 u16 hdr_info = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info);
1245 u16 hlen = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
1246 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
1247 if (hlen > IXGBE_RX_HDR_SIZE)
1248 hlen = IXGBE_RX_HDR_SIZE;
1249 return hlen;
1250 }
1251
1252 /**
1253 * ixgbe_transform_rsc_queue - change rsc queue into a full packet
1254 * @skb: pointer to the last skb in the rsc queue
1255 *
1256 * This function changes a queue full of hw rsc buffers into a completed
1257 * packet. It uses the ->prev pointers to find the first packet and then
1258 * turns it into the frag list owner.
1259 **/
1260 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb)
1261 {
1262 unsigned int frag_list_size = 0;
1263 unsigned int skb_cnt = 1;
1264
1265 while (skb->prev) {
1266 struct sk_buff *prev = skb->prev;
1267 frag_list_size += skb->len;
1268 skb->prev = NULL;
1269 skb = prev;
1270 skb_cnt++;
1271 }
1272
1273 skb_shinfo(skb)->frag_list = skb->next;
1274 skb->next = NULL;
1275 skb->len += frag_list_size;
1276 skb->data_len += frag_list_size;
1277 skb->truesize += frag_list_size;
1278 IXGBE_RSC_CB(skb)->skb_cnt = skb_cnt;
1279
1280 return skb;
1281 }
1282
1283 static inline bool ixgbe_get_rsc_state(union ixgbe_adv_rx_desc *rx_desc)
1284 {
1285 return !!(le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
1286 IXGBE_RXDADV_RSCCNT_MASK);
1287 }
1288
1289 static void ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
1290 struct ixgbe_ring *rx_ring,
1291 int *work_done, int work_to_do)
1292 {
1293 struct ixgbe_adapter *adapter = q_vector->adapter;
1294 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
1295 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
1296 struct sk_buff *skb;
1297 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1298 const int current_node = numa_node_id();
1299 #ifdef IXGBE_FCOE
1300 int ddp_bytes = 0;
1301 #endif /* IXGBE_FCOE */
1302 u32 staterr;
1303 u16 i;
1304 u16 cleaned_count = 0;
1305 bool pkt_is_rsc = false;
1306
1307 i = rx_ring->next_to_clean;
1308 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1309 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1310
1311 while (staterr & IXGBE_RXD_STAT_DD) {
1312 u32 upper_len = 0;
1313
1314 rmb(); /* read descriptor and rx_buffer_info after status DD */
1315
1316 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1317
1318 skb = rx_buffer_info->skb;
1319 rx_buffer_info->skb = NULL;
1320 prefetch(skb->data);
1321
1322 if (ring_is_rsc_enabled(rx_ring))
1323 pkt_is_rsc = ixgbe_get_rsc_state(rx_desc);
1324
1325 /* if this is a skb from previous receive DMA will be 0 */
1326 if (rx_buffer_info->dma) {
1327 u16 hlen;
1328 if (pkt_is_rsc &&
1329 !(staterr & IXGBE_RXD_STAT_EOP) &&
1330 !skb->prev) {
1331 /*
1332 * When HWRSC is enabled, delay unmapping
1333 * of the first packet. It carries the
1334 * header information, HW may still
1335 * access the header after the writeback.
1336 * Only unmap it when EOP is reached
1337 */
1338 IXGBE_RSC_CB(skb)->delay_unmap = true;
1339 IXGBE_RSC_CB(skb)->dma = rx_buffer_info->dma;
1340 } else {
1341 dma_unmap_single(rx_ring->dev,
1342 rx_buffer_info->dma,
1343 rx_ring->rx_buf_len,
1344 DMA_FROM_DEVICE);
1345 }
1346 rx_buffer_info->dma = 0;
1347
1348 if (ring_is_ps_enabled(rx_ring)) {
1349 hlen = ixgbe_get_hlen(rx_desc);
1350 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
1351 } else {
1352 hlen = le16_to_cpu(rx_desc->wb.upper.length);
1353 }
1354
1355 skb_put(skb, hlen);
1356 } else {
1357 /* assume packet split since header is unmapped */
1358 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
1359 }
1360
1361 if (upper_len) {
1362 dma_unmap_page(rx_ring->dev,
1363 rx_buffer_info->page_dma,
1364 PAGE_SIZE / 2,
1365 DMA_FROM_DEVICE);
1366 rx_buffer_info->page_dma = 0;
1367 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
1368 rx_buffer_info->page,
1369 rx_buffer_info->page_offset,
1370 upper_len);
1371
1372 if ((page_count(rx_buffer_info->page) == 1) &&
1373 (page_to_nid(rx_buffer_info->page) == current_node))
1374 get_page(rx_buffer_info->page);
1375 else
1376 rx_buffer_info->page = NULL;
1377
1378 skb->len += upper_len;
1379 skb->data_len += upper_len;
1380 skb->truesize += upper_len;
1381 }
1382
1383 i++;
1384 if (i == rx_ring->count)
1385 i = 0;
1386
1387 next_rxd = IXGBE_RX_DESC_ADV(rx_ring, i);
1388 prefetch(next_rxd);
1389 cleaned_count++;
1390
1391 if (pkt_is_rsc) {
1392 u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
1393 IXGBE_RXDADV_NEXTP_SHIFT;
1394 next_buffer = &rx_ring->rx_buffer_info[nextp];
1395 } else {
1396 next_buffer = &rx_ring->rx_buffer_info[i];
1397 }
1398
1399 if (!(staterr & IXGBE_RXD_STAT_EOP)) {
1400 if (ring_is_ps_enabled(rx_ring)) {
1401 rx_buffer_info->skb = next_buffer->skb;
1402 rx_buffer_info->dma = next_buffer->dma;
1403 next_buffer->skb = skb;
1404 next_buffer->dma = 0;
1405 } else {
1406 skb->next = next_buffer->skb;
1407 skb->next->prev = skb;
1408 }
1409 rx_ring->rx_stats.non_eop_descs++;
1410 goto next_desc;
1411 }
1412
1413 if (skb->prev) {
1414 skb = ixgbe_transform_rsc_queue(skb);
1415 /* if we got here without RSC the packet is invalid */
1416 if (!pkt_is_rsc) {
1417 __pskb_trim(skb, 0);
1418 rx_buffer_info->skb = skb;
1419 goto next_desc;
1420 }
1421 }
1422
1423 if (ring_is_rsc_enabled(rx_ring)) {
1424 if (IXGBE_RSC_CB(skb)->delay_unmap) {
1425 dma_unmap_single(rx_ring->dev,
1426 IXGBE_RSC_CB(skb)->dma,
1427 rx_ring->rx_buf_len,
1428 DMA_FROM_DEVICE);
1429 IXGBE_RSC_CB(skb)->dma = 0;
1430 IXGBE_RSC_CB(skb)->delay_unmap = false;
1431 }
1432 }
1433 if (pkt_is_rsc) {
1434 if (ring_is_ps_enabled(rx_ring))
1435 rx_ring->rx_stats.rsc_count +=
1436 skb_shinfo(skb)->nr_frags;
1437 else
1438 rx_ring->rx_stats.rsc_count +=
1439 IXGBE_RSC_CB(skb)->skb_cnt;
1440 rx_ring->rx_stats.rsc_flush++;
1441 }
1442
1443 /* ERR_MASK will only have valid bits if EOP set */
1444 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
1445 /* trim packet back to size 0 and recycle it */
1446 __pskb_trim(skb, 0);
1447 rx_buffer_info->skb = skb;
1448 goto next_desc;
1449 }
1450
1451 ixgbe_rx_checksum(adapter, rx_desc, skb);
1452
1453 /* probably a little skewed due to removing CRC */
1454 total_rx_bytes += skb->len;
1455 total_rx_packets++;
1456
1457 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
1458 #ifdef IXGBE_FCOE
1459 /* if ddp, not passing to ULD unless for FCP_RSP or error */
1460 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
1461 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
1462 if (!ddp_bytes)
1463 goto next_desc;
1464 }
1465 #endif /* IXGBE_FCOE */
1466 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
1467
1468 next_desc:
1469 rx_desc->wb.upper.status_error = 0;
1470
1471 (*work_done)++;
1472 if (*work_done >= work_to_do)
1473 break;
1474
1475 /* return some buffers to hardware, one at a time is too slow */
1476 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
1477 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1478 cleaned_count = 0;
1479 }
1480
1481 /* use prefetched values */
1482 rx_desc = next_rxd;
1483 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1484 }
1485
1486 rx_ring->next_to_clean = i;
1487 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
1488
1489 if (cleaned_count)
1490 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1491
1492 #ifdef IXGBE_FCOE
1493 /* include DDPed FCoE data */
1494 if (ddp_bytes > 0) {
1495 unsigned int mss;
1496
1497 mss = rx_ring->netdev->mtu - sizeof(struct fcoe_hdr) -
1498 sizeof(struct fc_frame_header) -
1499 sizeof(struct fcoe_crc_eof);
1500 if (mss > 512)
1501 mss &= ~511;
1502 total_rx_bytes += ddp_bytes;
1503 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
1504 }
1505 #endif /* IXGBE_FCOE */
1506
1507 rx_ring->total_packets += total_rx_packets;
1508 rx_ring->total_bytes += total_rx_bytes;
1509 u64_stats_update_begin(&rx_ring->syncp);
1510 rx_ring->stats.packets += total_rx_packets;
1511 rx_ring->stats.bytes += total_rx_bytes;
1512 u64_stats_update_end(&rx_ring->syncp);
1513 }
1514
1515 static int ixgbe_clean_rxonly(struct napi_struct *, int);
1516 /**
1517 * ixgbe_configure_msix - Configure MSI-X hardware
1518 * @adapter: board private structure
1519 *
1520 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
1521 * interrupts.
1522 **/
1523 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
1524 {
1525 struct ixgbe_q_vector *q_vector;
1526 int i, q_vectors, v_idx, r_idx;
1527 u32 mask;
1528
1529 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1530
1531 /*
1532 * Populate the IVAR table and set the ITR values to the
1533 * corresponding register.
1534 */
1535 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1536 q_vector = adapter->q_vector[v_idx];
1537 /* XXX for_each_set_bit(...) */
1538 r_idx = find_first_bit(q_vector->rxr_idx,
1539 adapter->num_rx_queues);
1540
1541 for (i = 0; i < q_vector->rxr_count; i++) {
1542 u8 reg_idx = adapter->rx_ring[r_idx]->reg_idx;
1543 ixgbe_set_ivar(adapter, 0, reg_idx, v_idx);
1544 r_idx = find_next_bit(q_vector->rxr_idx,
1545 adapter->num_rx_queues,
1546 r_idx + 1);
1547 }
1548 r_idx = find_first_bit(q_vector->txr_idx,
1549 adapter->num_tx_queues);
1550
1551 for (i = 0; i < q_vector->txr_count; i++) {
1552 u8 reg_idx = adapter->tx_ring[r_idx]->reg_idx;
1553 ixgbe_set_ivar(adapter, 1, reg_idx, v_idx);
1554 r_idx = find_next_bit(q_vector->txr_idx,
1555 adapter->num_tx_queues,
1556 r_idx + 1);
1557 }
1558
1559 if (q_vector->txr_count && !q_vector->rxr_count)
1560 /* tx only */
1561 q_vector->eitr = adapter->tx_eitr_param;
1562 else if (q_vector->rxr_count)
1563 /* rx or mixed */
1564 q_vector->eitr = adapter->rx_eitr_param;
1565
1566 ixgbe_write_eitr(q_vector);
1567 /* If Flow Director is enabled, set interrupt affinity */
1568 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
1569 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)) {
1570 /*
1571 * Allocate the affinity_hint cpumask, assign the mask
1572 * for this vector, and set our affinity_hint for
1573 * this irq.
1574 */
1575 if (!alloc_cpumask_var(&q_vector->affinity_mask,
1576 GFP_KERNEL))
1577 return;
1578 cpumask_set_cpu(v_idx, q_vector->affinity_mask);
1579 irq_set_affinity_hint(adapter->msix_entries[v_idx].vector,
1580 q_vector->affinity_mask);
1581 }
1582 }
1583
1584 switch (adapter->hw.mac.type) {
1585 case ixgbe_mac_82598EB:
1586 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
1587 v_idx);
1588 break;
1589 case ixgbe_mac_82599EB:
1590 case ixgbe_mac_X540:
1591 ixgbe_set_ivar(adapter, -1, 1, v_idx);
1592 break;
1593
1594 default:
1595 break;
1596 }
1597 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
1598
1599 /* set up to autoclear timer, and the vectors */
1600 mask = IXGBE_EIMS_ENABLE_MASK;
1601 if (adapter->num_vfs)
1602 mask &= ~(IXGBE_EIMS_OTHER |
1603 IXGBE_EIMS_MAILBOX |
1604 IXGBE_EIMS_LSC);
1605 else
1606 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
1607 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
1608 }
1609
1610 enum latency_range {
1611 lowest_latency = 0,
1612 low_latency = 1,
1613 bulk_latency = 2,
1614 latency_invalid = 255
1615 };
1616
1617 /**
1618 * ixgbe_update_itr - update the dynamic ITR value based on statistics
1619 * @adapter: pointer to adapter
1620 * @eitr: eitr setting (ints per sec) to give last timeslice
1621 * @itr_setting: current throttle rate in ints/second
1622 * @packets: the number of packets during this measurement interval
1623 * @bytes: the number of bytes during this measurement interval
1624 *
1625 * Stores a new ITR value based on packets and byte
1626 * counts during the last interrupt. The advantage of per interrupt
1627 * computation is faster updates and more accurate ITR for the current
1628 * traffic pattern. Constants in this function were computed
1629 * based on theoretical maximum wire speed and thresholds were set based
1630 * on testing data as well as attempting to minimize response time
1631 * while increasing bulk throughput.
1632 * this functionality is controlled by the InterruptThrottleRate module
1633 * parameter (see ixgbe_param.c)
1634 **/
1635 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
1636 u32 eitr, u8 itr_setting,
1637 int packets, int bytes)
1638 {
1639 unsigned int retval = itr_setting;
1640 u32 timepassed_us;
1641 u64 bytes_perint;
1642
1643 if (packets == 0)
1644 goto update_itr_done;
1645
1646
1647 /* simple throttlerate management
1648 * 0-20MB/s lowest (100000 ints/s)
1649 * 20-100MB/s low (20000 ints/s)
1650 * 100-1249MB/s bulk (8000 ints/s)
1651 */
1652 /* what was last interrupt timeslice? */
1653 timepassed_us = 1000000/eitr;
1654 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1655
1656 switch (itr_setting) {
1657 case lowest_latency:
1658 if (bytes_perint > adapter->eitr_low)
1659 retval = low_latency;
1660 break;
1661 case low_latency:
1662 if (bytes_perint > adapter->eitr_high)
1663 retval = bulk_latency;
1664 else if (bytes_perint <= adapter->eitr_low)
1665 retval = lowest_latency;
1666 break;
1667 case bulk_latency:
1668 if (bytes_perint <= adapter->eitr_high)
1669 retval = low_latency;
1670 break;
1671 }
1672
1673 update_itr_done:
1674 return retval;
1675 }
1676
1677 /**
1678 * ixgbe_write_eitr - write EITR register in hardware specific way
1679 * @q_vector: structure containing interrupt and ring information
1680 *
1681 * This function is made to be called by ethtool and by the driver
1682 * when it needs to update EITR registers at runtime. Hardware
1683 * specific quirks/differences are taken care of here.
1684 */
1685 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1686 {
1687 struct ixgbe_adapter *adapter = q_vector->adapter;
1688 struct ixgbe_hw *hw = &adapter->hw;
1689 int v_idx = q_vector->v_idx;
1690 u32 itr_reg = EITR_INTS_PER_SEC_TO_REG(q_vector->eitr);
1691
1692 switch (adapter->hw.mac.type) {
1693 case ixgbe_mac_82598EB:
1694 /* must write high and low 16 bits to reset counter */
1695 itr_reg |= (itr_reg << 16);
1696 break;
1697 case ixgbe_mac_82599EB:
1698 case ixgbe_mac_X540:
1699 /*
1700 * 82599 and X540 can support a value of zero, so allow it for
1701 * max interrupt rate, but there is an errata where it can
1702 * not be zero with RSC
1703 */
1704 if (itr_reg == 8 &&
1705 !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
1706 itr_reg = 0;
1707
1708 /*
1709 * set the WDIS bit to not clear the timer bits and cause an
1710 * immediate assertion of the interrupt
1711 */
1712 itr_reg |= IXGBE_EITR_CNT_WDIS;
1713 break;
1714 default:
1715 break;
1716 }
1717 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1718 }
1719
1720 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
1721 {
1722 struct ixgbe_adapter *adapter = q_vector->adapter;
1723 int i, r_idx;
1724 u32 new_itr;
1725 u8 current_itr, ret_itr;
1726
1727 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1728 for (i = 0; i < q_vector->txr_count; i++) {
1729 struct ixgbe_ring *tx_ring = adapter->tx_ring[r_idx];
1730 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1731 q_vector->tx_itr,
1732 tx_ring->total_packets,
1733 tx_ring->total_bytes);
1734 /* if the result for this queue would decrease interrupt
1735 * rate for this vector then use that result */
1736 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
1737 q_vector->tx_itr - 1 : ret_itr);
1738 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1739 r_idx + 1);
1740 }
1741
1742 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1743 for (i = 0; i < q_vector->rxr_count; i++) {
1744 struct ixgbe_ring *rx_ring = adapter->rx_ring[r_idx];
1745 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1746 q_vector->rx_itr,
1747 rx_ring->total_packets,
1748 rx_ring->total_bytes);
1749 /* if the result for this queue would decrease interrupt
1750 * rate for this vector then use that result */
1751 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
1752 q_vector->rx_itr - 1 : ret_itr);
1753 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1754 r_idx + 1);
1755 }
1756
1757 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1758
1759 switch (current_itr) {
1760 /* counts and packets in update_itr are dependent on these numbers */
1761 case lowest_latency:
1762 new_itr = 100000;
1763 break;
1764 case low_latency:
1765 new_itr = 20000; /* aka hwitr = ~200 */
1766 break;
1767 case bulk_latency:
1768 default:
1769 new_itr = 8000;
1770 break;
1771 }
1772
1773 if (new_itr != q_vector->eitr) {
1774 /* do an exponential smoothing */
1775 new_itr = ((q_vector->eitr * 9) + new_itr)/10;
1776
1777 /* save the algorithm value here, not the smoothed one */
1778 q_vector->eitr = new_itr;
1779
1780 ixgbe_write_eitr(q_vector);
1781 }
1782 }
1783
1784 /**
1785 * ixgbe_check_overtemp_task - worker thread to check over tempurature
1786 * @work: pointer to work_struct containing our data
1787 **/
1788 static void ixgbe_check_overtemp_task(struct work_struct *work)
1789 {
1790 struct ixgbe_adapter *adapter = container_of(work,
1791 struct ixgbe_adapter,
1792 check_overtemp_task);
1793 struct ixgbe_hw *hw = &adapter->hw;
1794 u32 eicr = adapter->interrupt_event;
1795
1796 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE))
1797 return;
1798
1799 switch (hw->device_id) {
1800 case IXGBE_DEV_ID_82599_T3_LOM: {
1801 u32 autoneg;
1802 bool link_up = false;
1803
1804 if (hw->mac.ops.check_link)
1805 hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
1806
1807 if (((eicr & IXGBE_EICR_GPI_SDP0) && (!link_up)) ||
1808 (eicr & IXGBE_EICR_LSC))
1809 /* Check if this is due to overtemp */
1810 if (hw->phy.ops.check_overtemp(hw) == IXGBE_ERR_OVERTEMP)
1811 break;
1812 return;
1813 }
1814 default:
1815 if (!(eicr & IXGBE_EICR_GPI_SDP0))
1816 return;
1817 break;
1818 }
1819 e_crit(drv,
1820 "Network adapter has been stopped because it has over heated. "
1821 "Restart the computer. If the problem persists, "
1822 "power off the system and replace the adapter\n");
1823 /* write to clear the interrupt */
1824 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP0);
1825 }
1826
1827 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1828 {
1829 struct ixgbe_hw *hw = &adapter->hw;
1830
1831 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1832 (eicr & IXGBE_EICR_GPI_SDP1)) {
1833 e_crit(probe, "Fan has stopped, replace the adapter\n");
1834 /* write to clear the interrupt */
1835 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1836 }
1837 }
1838
1839 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1840 {
1841 struct ixgbe_hw *hw = &adapter->hw;
1842
1843 if (eicr & IXGBE_EICR_GPI_SDP2) {
1844 /* Clear the interrupt */
1845 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1846 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1847 schedule_work(&adapter->sfp_config_module_task);
1848 }
1849
1850 if (eicr & IXGBE_EICR_GPI_SDP1) {
1851 /* Clear the interrupt */
1852 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1853 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1854 schedule_work(&adapter->multispeed_fiber_task);
1855 }
1856 }
1857
1858 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1859 {
1860 struct ixgbe_hw *hw = &adapter->hw;
1861
1862 adapter->lsc_int++;
1863 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1864 adapter->link_check_timeout = jiffies;
1865 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1866 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1867 IXGBE_WRITE_FLUSH(hw);
1868 schedule_work(&adapter->watchdog_task);
1869 }
1870 }
1871
1872 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1873 {
1874 struct net_device *netdev = data;
1875 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1876 struct ixgbe_hw *hw = &adapter->hw;
1877 u32 eicr;
1878
1879 /*
1880 * Workaround for Silicon errata. Use clear-by-write instead
1881 * of clear-by-read. Reading with EICS will return the
1882 * interrupt causes without clearing, which later be done
1883 * with the write to EICR.
1884 */
1885 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1886 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1887
1888 if (eicr & IXGBE_EICR_LSC)
1889 ixgbe_check_lsc(adapter);
1890
1891 if (eicr & IXGBE_EICR_MAILBOX)
1892 ixgbe_msg_task(adapter);
1893
1894 switch (hw->mac.type) {
1895 case ixgbe_mac_82599EB:
1896 case ixgbe_mac_X540:
1897 /* Handle Flow Director Full threshold interrupt */
1898 if (eicr & IXGBE_EICR_FLOW_DIR) {
1899 int i;
1900 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_FLOW_DIR);
1901 /* Disable transmits before FDIR Re-initialization */
1902 netif_tx_stop_all_queues(netdev);
1903 for (i = 0; i < adapter->num_tx_queues; i++) {
1904 struct ixgbe_ring *tx_ring =
1905 adapter->tx_ring[i];
1906 if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE,
1907 &tx_ring->state))
1908 schedule_work(&adapter->fdir_reinit_task);
1909 }
1910 }
1911 ixgbe_check_sfp_event(adapter, eicr);
1912 if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
1913 ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC))) {
1914 adapter->interrupt_event = eicr;
1915 schedule_work(&adapter->check_overtemp_task);
1916 }
1917 break;
1918 default:
1919 break;
1920 }
1921
1922 ixgbe_check_fan_failure(adapter, eicr);
1923
1924 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1925 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
1926
1927 return IRQ_HANDLED;
1928 }
1929
1930 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1931 u64 qmask)
1932 {
1933 u32 mask;
1934 struct ixgbe_hw *hw = &adapter->hw;
1935
1936 switch (hw->mac.type) {
1937 case ixgbe_mac_82598EB:
1938 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1939 IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
1940 break;
1941 case ixgbe_mac_82599EB:
1942 case ixgbe_mac_X540:
1943 mask = (qmask & 0xFFFFFFFF);
1944 if (mask)
1945 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
1946 mask = (qmask >> 32);
1947 if (mask)
1948 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
1949 break;
1950 default:
1951 break;
1952 }
1953 /* skip the flush */
1954 }
1955
1956 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1957 u64 qmask)
1958 {
1959 u32 mask;
1960 struct ixgbe_hw *hw = &adapter->hw;
1961
1962 switch (hw->mac.type) {
1963 case ixgbe_mac_82598EB:
1964 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1965 IXGBE_WRITE_REG(hw, IXGBE_EIMC, mask);
1966 break;
1967 case ixgbe_mac_82599EB:
1968 case ixgbe_mac_X540:
1969 mask = (qmask & 0xFFFFFFFF);
1970 if (mask)
1971 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(0), mask);
1972 mask = (qmask >> 32);
1973 if (mask)
1974 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(1), mask);
1975 break;
1976 default:
1977 break;
1978 }
1979 /* skip the flush */
1980 }
1981
1982 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
1983 {
1984 struct ixgbe_q_vector *q_vector = data;
1985 struct ixgbe_adapter *adapter = q_vector->adapter;
1986 struct ixgbe_ring *tx_ring;
1987 int i, r_idx;
1988
1989 if (!q_vector->txr_count)
1990 return IRQ_HANDLED;
1991
1992 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1993 for (i = 0; i < q_vector->txr_count; i++) {
1994 tx_ring = adapter->tx_ring[r_idx];
1995 tx_ring->total_bytes = 0;
1996 tx_ring->total_packets = 0;
1997 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1998 r_idx + 1);
1999 }
2000
2001 /* EIAM disabled interrupts (on this vector) for us */
2002 napi_schedule(&q_vector->napi);
2003
2004 return IRQ_HANDLED;
2005 }
2006
2007 /**
2008 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
2009 * @irq: unused
2010 * @data: pointer to our q_vector struct for this interrupt vector
2011 **/
2012 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
2013 {
2014 struct ixgbe_q_vector *q_vector = data;
2015 struct ixgbe_adapter *adapter = q_vector->adapter;
2016 struct ixgbe_ring *rx_ring;
2017 int r_idx;
2018 int i;
2019
2020 #ifdef CONFIG_IXGBE_DCA
2021 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2022 ixgbe_update_dca(q_vector);
2023 #endif
2024
2025 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
2026 for (i = 0; i < q_vector->rxr_count; i++) {
2027 rx_ring = adapter->rx_ring[r_idx];
2028 rx_ring->total_bytes = 0;
2029 rx_ring->total_packets = 0;
2030 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
2031 r_idx + 1);
2032 }
2033
2034 if (!q_vector->rxr_count)
2035 return IRQ_HANDLED;
2036
2037 /* EIAM disabled interrupts (on this vector) for us */
2038 napi_schedule(&q_vector->napi);
2039
2040 return IRQ_HANDLED;
2041 }
2042
2043 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
2044 {
2045 struct ixgbe_q_vector *q_vector = data;
2046 struct ixgbe_adapter *adapter = q_vector->adapter;
2047 struct ixgbe_ring *ring;
2048 int r_idx;
2049 int i;
2050
2051 if (!q_vector->txr_count && !q_vector->rxr_count)
2052 return IRQ_HANDLED;
2053
2054 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
2055 for (i = 0; i < q_vector->txr_count; i++) {
2056 ring = adapter->tx_ring[r_idx];
2057 ring->total_bytes = 0;
2058 ring->total_packets = 0;
2059 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
2060 r_idx + 1);
2061 }
2062
2063 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
2064 for (i = 0; i < q_vector->rxr_count; i++) {
2065 ring = adapter->rx_ring[r_idx];
2066 ring->total_bytes = 0;
2067 ring->total_packets = 0;
2068 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
2069 r_idx + 1);
2070 }
2071
2072 /* EIAM disabled interrupts (on this vector) for us */
2073 napi_schedule(&q_vector->napi);
2074
2075 return IRQ_HANDLED;
2076 }
2077
2078 /**
2079 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
2080 * @napi: napi struct with our devices info in it
2081 * @budget: amount of work driver is allowed to do this pass, in packets
2082 *
2083 * This function is optimized for cleaning one queue only on a single
2084 * q_vector!!!
2085 **/
2086 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
2087 {
2088 struct ixgbe_q_vector *q_vector =
2089 container_of(napi, struct ixgbe_q_vector, napi);
2090 struct ixgbe_adapter *adapter = q_vector->adapter;
2091 struct ixgbe_ring *rx_ring = NULL;
2092 int work_done = 0;
2093 long r_idx;
2094
2095 #ifdef CONFIG_IXGBE_DCA
2096 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2097 ixgbe_update_dca(q_vector);
2098 #endif
2099
2100 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
2101 rx_ring = adapter->rx_ring[r_idx];
2102
2103 ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
2104
2105 /* If all Rx work done, exit the polling mode */
2106 if (work_done < budget) {
2107 napi_complete(napi);
2108 if (adapter->rx_itr_setting & 1)
2109 ixgbe_set_itr_msix(q_vector);
2110 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2111 ixgbe_irq_enable_queues(adapter,
2112 ((u64)1 << q_vector->v_idx));
2113 }
2114
2115 return work_done;
2116 }
2117
2118 /**
2119 * ixgbe_clean_rxtx_many - msix (aka one shot) rx clean routine
2120 * @napi: napi struct with our devices info in it
2121 * @budget: amount of work driver is allowed to do this pass, in packets
2122 *
2123 * This function will clean more than one rx queue associated with a
2124 * q_vector.
2125 **/
2126 static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
2127 {
2128 struct ixgbe_q_vector *q_vector =
2129 container_of(napi, struct ixgbe_q_vector, napi);
2130 struct ixgbe_adapter *adapter = q_vector->adapter;
2131 struct ixgbe_ring *ring = NULL;
2132 int work_done = 0, i;
2133 long r_idx;
2134 bool tx_clean_complete = true;
2135
2136 #ifdef CONFIG_IXGBE_DCA
2137 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2138 ixgbe_update_dca(q_vector);
2139 #endif
2140
2141 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
2142 for (i = 0; i < q_vector->txr_count; i++) {
2143 ring = adapter->tx_ring[r_idx];
2144 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
2145 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
2146 r_idx + 1);
2147 }
2148
2149 /* attempt to distribute budget to each queue fairly, but don't allow
2150 * the budget to go below 1 because we'll exit polling */
2151 budget /= (q_vector->rxr_count ?: 1);
2152 budget = max(budget, 1);
2153 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
2154 for (i = 0; i < q_vector->rxr_count; i++) {
2155 ring = adapter->rx_ring[r_idx];
2156 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
2157 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
2158 r_idx + 1);
2159 }
2160
2161 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
2162 ring = adapter->rx_ring[r_idx];
2163 /* If all Rx work done, exit the polling mode */
2164 if (work_done < budget) {
2165 napi_complete(napi);
2166 if (adapter->rx_itr_setting & 1)
2167 ixgbe_set_itr_msix(q_vector);
2168 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2169 ixgbe_irq_enable_queues(adapter,
2170 ((u64)1 << q_vector->v_idx));
2171 return 0;
2172 }
2173
2174 return work_done;
2175 }
2176
2177 /**
2178 * ixgbe_clean_txonly - msix (aka one shot) tx clean routine
2179 * @napi: napi struct with our devices info in it
2180 * @budget: amount of work driver is allowed to do this pass, in packets
2181 *
2182 * This function is optimized for cleaning one queue only on a single
2183 * q_vector!!!
2184 **/
2185 static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
2186 {
2187 struct ixgbe_q_vector *q_vector =
2188 container_of(napi, struct ixgbe_q_vector, napi);
2189 struct ixgbe_adapter *adapter = q_vector->adapter;
2190 struct ixgbe_ring *tx_ring = NULL;
2191 int work_done = 0;
2192 long r_idx;
2193
2194 #ifdef CONFIG_IXGBE_DCA
2195 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2196 ixgbe_update_dca(q_vector);
2197 #endif
2198
2199 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
2200 tx_ring = adapter->tx_ring[r_idx];
2201
2202 if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
2203 work_done = budget;
2204
2205 /* If all Tx work done, exit the polling mode */
2206 if (work_done < budget) {
2207 napi_complete(napi);
2208 if (adapter->tx_itr_setting & 1)
2209 ixgbe_set_itr_msix(q_vector);
2210 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2211 ixgbe_irq_enable_queues(adapter,
2212 ((u64)1 << q_vector->v_idx));
2213 }
2214
2215 return work_done;
2216 }
2217
2218 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
2219 int r_idx)
2220 {
2221 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2222 struct ixgbe_ring *rx_ring = a->rx_ring[r_idx];
2223
2224 set_bit(r_idx, q_vector->rxr_idx);
2225 q_vector->rxr_count++;
2226 rx_ring->q_vector = q_vector;
2227 }
2228
2229 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
2230 int t_idx)
2231 {
2232 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2233 struct ixgbe_ring *tx_ring = a->tx_ring[t_idx];
2234
2235 set_bit(t_idx, q_vector->txr_idx);
2236 q_vector->txr_count++;
2237 tx_ring->q_vector = q_vector;
2238 }
2239
2240 /**
2241 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
2242 * @adapter: board private structure to initialize
2243 *
2244 * This function maps descriptor rings to the queue-specific vectors
2245 * we were allotted through the MSI-X enabling code. Ideally, we'd have
2246 * one vector per ring/queue, but on a constrained vector budget, we
2247 * group the rings as "efficiently" as possible. You would add new
2248 * mapping configurations in here.
2249 **/
2250 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter)
2251 {
2252 int q_vectors;
2253 int v_start = 0;
2254 int rxr_idx = 0, txr_idx = 0;
2255 int rxr_remaining = adapter->num_rx_queues;
2256 int txr_remaining = adapter->num_tx_queues;
2257 int i, j;
2258 int rqpv, tqpv;
2259 int err = 0;
2260
2261 /* No mapping required if MSI-X is disabled. */
2262 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2263 goto out;
2264
2265 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2266
2267 /*
2268 * The ideal configuration...
2269 * We have enough vectors to map one per queue.
2270 */
2271 if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
2272 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
2273 map_vector_to_rxq(adapter, v_start, rxr_idx);
2274
2275 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
2276 map_vector_to_txq(adapter, v_start, txr_idx);
2277
2278 goto out;
2279 }
2280
2281 /*
2282 * If we don't have enough vectors for a 1-to-1
2283 * mapping, we'll have to group them so there are
2284 * multiple queues per vector.
2285 */
2286 /* Re-adjusting *qpv takes care of the remainder. */
2287 for (i = v_start; i < q_vectors; i++) {
2288 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
2289 for (j = 0; j < rqpv; j++) {
2290 map_vector_to_rxq(adapter, i, rxr_idx);
2291 rxr_idx++;
2292 rxr_remaining--;
2293 }
2294 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
2295 for (j = 0; j < tqpv; j++) {
2296 map_vector_to_txq(adapter, i, txr_idx);
2297 txr_idx++;
2298 txr_remaining--;
2299 }
2300 }
2301 out:
2302 return err;
2303 }
2304
2305 /**
2306 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2307 * @adapter: board private structure
2308 *
2309 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2310 * interrupts from the kernel.
2311 **/
2312 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2313 {
2314 struct net_device *netdev = adapter->netdev;
2315 irqreturn_t (*handler)(int, void *);
2316 int i, vector, q_vectors, err;
2317 int ri = 0, ti = 0;
2318
2319 /* Decrement for Other and TCP Timer vectors */
2320 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2321
2322 err = ixgbe_map_rings_to_vectors(adapter);
2323 if (err)
2324 return err;
2325
2326 #define SET_HANDLER(_v) (((_v)->rxr_count && (_v)->txr_count) \
2327 ? &ixgbe_msix_clean_many : \
2328 (_v)->rxr_count ? &ixgbe_msix_clean_rx : \
2329 (_v)->txr_count ? &ixgbe_msix_clean_tx : \
2330 NULL)
2331 for (vector = 0; vector < q_vectors; vector++) {
2332 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
2333 handler = SET_HANDLER(q_vector);
2334
2335 if (handler == &ixgbe_msix_clean_rx) {
2336 sprintf(q_vector->name, "%s-%s-%d",
2337 netdev->name, "rx", ri++);
2338 } else if (handler == &ixgbe_msix_clean_tx) {
2339 sprintf(q_vector->name, "%s-%s-%d",
2340 netdev->name, "tx", ti++);
2341 } else if (handler == &ixgbe_msix_clean_many) {
2342 sprintf(q_vector->name, "%s-%s-%d",
2343 netdev->name, "TxRx", ri++);
2344 ti++;
2345 } else {
2346 /* skip this unused q_vector */
2347 continue;
2348 }
2349 err = request_irq(adapter->msix_entries[vector].vector,
2350 handler, 0, q_vector->name,
2351 q_vector);
2352 if (err) {
2353 e_err(probe, "request_irq failed for MSIX interrupt "
2354 "Error: %d\n", err);
2355 goto free_queue_irqs;
2356 }
2357 }
2358
2359 sprintf(adapter->lsc_int_name, "%s:lsc", netdev->name);
2360 err = request_irq(adapter->msix_entries[vector].vector,
2361 ixgbe_msix_lsc, 0, adapter->lsc_int_name, netdev);
2362 if (err) {
2363 e_err(probe, "request_irq for msix_lsc failed: %d\n", err);
2364 goto free_queue_irqs;
2365 }
2366
2367 return 0;
2368
2369 free_queue_irqs:
2370 for (i = vector - 1; i >= 0; i--)
2371 free_irq(adapter->msix_entries[--vector].vector,
2372 adapter->q_vector[i]);
2373 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2374 pci_disable_msix(adapter->pdev);
2375 kfree(adapter->msix_entries);
2376 adapter->msix_entries = NULL;
2377 return err;
2378 }
2379
2380 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
2381 {
2382 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2383 struct ixgbe_ring *rx_ring = adapter->rx_ring[0];
2384 struct ixgbe_ring *tx_ring = adapter->tx_ring[0];
2385 u32 new_itr = q_vector->eitr;
2386 u8 current_itr;
2387
2388 q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
2389 q_vector->tx_itr,
2390 tx_ring->total_packets,
2391 tx_ring->total_bytes);
2392 q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
2393 q_vector->rx_itr,
2394 rx_ring->total_packets,
2395 rx_ring->total_bytes);
2396
2397 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
2398
2399 switch (current_itr) {
2400 /* counts and packets in update_itr are dependent on these numbers */
2401 case lowest_latency:
2402 new_itr = 100000;
2403 break;
2404 case low_latency:
2405 new_itr = 20000; /* aka hwitr = ~200 */
2406 break;
2407 case bulk_latency:
2408 new_itr = 8000;
2409 break;
2410 default:
2411 break;
2412 }
2413
2414 if (new_itr != q_vector->eitr) {
2415 /* do an exponential smoothing */
2416 new_itr = ((q_vector->eitr * 9) + new_itr)/10;
2417
2418 /* save the algorithm value here */
2419 q_vector->eitr = new_itr;
2420
2421 ixgbe_write_eitr(q_vector);
2422 }
2423 }
2424
2425 /**
2426 * ixgbe_irq_enable - Enable default interrupt generation settings
2427 * @adapter: board private structure
2428 **/
2429 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
2430 bool flush)
2431 {
2432 u32 mask;
2433
2434 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
2435 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
2436 mask |= IXGBE_EIMS_GPI_SDP0;
2437 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
2438 mask |= IXGBE_EIMS_GPI_SDP1;
2439 switch (adapter->hw.mac.type) {
2440 case ixgbe_mac_82599EB:
2441 case ixgbe_mac_X540:
2442 mask |= IXGBE_EIMS_ECC;
2443 mask |= IXGBE_EIMS_GPI_SDP1;
2444 mask |= IXGBE_EIMS_GPI_SDP2;
2445 if (adapter->num_vfs)
2446 mask |= IXGBE_EIMS_MAILBOX;
2447 break;
2448 default:
2449 break;
2450 }
2451 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
2452 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
2453 mask |= IXGBE_EIMS_FLOW_DIR;
2454
2455 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
2456 if (queues)
2457 ixgbe_irq_enable_queues(adapter, ~0);
2458 if (flush)
2459 IXGBE_WRITE_FLUSH(&adapter->hw);
2460
2461 if (adapter->num_vfs > 32) {
2462 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
2463 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
2464 }
2465 }
2466
2467 /**
2468 * ixgbe_intr - legacy mode Interrupt Handler
2469 * @irq: interrupt number
2470 * @data: pointer to a network interface device structure
2471 **/
2472 static irqreturn_t ixgbe_intr(int irq, void *data)
2473 {
2474 struct net_device *netdev = data;
2475 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2476 struct ixgbe_hw *hw = &adapter->hw;
2477 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2478 u32 eicr;
2479
2480 /*
2481 * Workaround for silicon errata on 82598. Mask the interrupts
2482 * before the read of EICR.
2483 */
2484 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2485
2486 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2487 * therefore no explict interrupt disable is necessary */
2488 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2489 if (!eicr) {
2490 /*
2491 * shared interrupt alert!
2492 * make sure interrupts are enabled because the read will
2493 * have disabled interrupts due to EIAM
2494 * finish the workaround of silicon errata on 82598. Unmask
2495 * the interrupt that we masked before the EICR read.
2496 */
2497 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2498 ixgbe_irq_enable(adapter, true, true);
2499 return IRQ_NONE; /* Not our interrupt */
2500 }
2501
2502 if (eicr & IXGBE_EICR_LSC)
2503 ixgbe_check_lsc(adapter);
2504
2505 switch (hw->mac.type) {
2506 case ixgbe_mac_82599EB:
2507 case ixgbe_mac_X540:
2508 ixgbe_check_sfp_event(adapter, eicr);
2509 if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
2510 ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC))) {
2511 adapter->interrupt_event = eicr;
2512 schedule_work(&adapter->check_overtemp_task);
2513 }
2514 break;
2515 default:
2516 break;
2517 }
2518
2519 ixgbe_check_fan_failure(adapter, eicr);
2520
2521 if (napi_schedule_prep(&(q_vector->napi))) {
2522 adapter->tx_ring[0]->total_packets = 0;
2523 adapter->tx_ring[0]->total_bytes = 0;
2524 adapter->rx_ring[0]->total_packets = 0;
2525 adapter->rx_ring[0]->total_bytes = 0;
2526 /* would disable interrupts here but EIAM disabled it */
2527 __napi_schedule(&(q_vector->napi));
2528 }
2529
2530 /*
2531 * re-enable link(maybe) and non-queue interrupts, no flush.
2532 * ixgbe_poll will re-enable the queue interrupts
2533 */
2534
2535 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2536 ixgbe_irq_enable(adapter, false, false);
2537
2538 return IRQ_HANDLED;
2539 }
2540
2541 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
2542 {
2543 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2544
2545 for (i = 0; i < q_vectors; i++) {
2546 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
2547 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
2548 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
2549 q_vector->rxr_count = 0;
2550 q_vector->txr_count = 0;
2551 }
2552 }
2553
2554 /**
2555 * ixgbe_request_irq - initialize interrupts
2556 * @adapter: board private structure
2557 *
2558 * Attempts to configure interrupts using the best available
2559 * capabilities of the hardware and kernel.
2560 **/
2561 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
2562 {
2563 struct net_device *netdev = adapter->netdev;
2564 int err;
2565
2566 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2567 err = ixgbe_request_msix_irqs(adapter);
2568 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
2569 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
2570 netdev->name, netdev);
2571 } else {
2572 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
2573 netdev->name, netdev);
2574 }
2575
2576 if (err)
2577 e_err(probe, "request_irq failed, Error %d\n", err);
2578
2579 return err;
2580 }
2581
2582 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
2583 {
2584 struct net_device *netdev = adapter->netdev;
2585
2586 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2587 int i, q_vectors;
2588
2589 q_vectors = adapter->num_msix_vectors;
2590
2591 i = q_vectors - 1;
2592 free_irq(adapter->msix_entries[i].vector, netdev);
2593
2594 i--;
2595 for (; i >= 0; i--) {
2596 free_irq(adapter->msix_entries[i].vector,
2597 adapter->q_vector[i]);
2598 }
2599
2600 ixgbe_reset_q_vectors(adapter);
2601 } else {
2602 free_irq(adapter->pdev->irq, netdev);
2603 }
2604 }
2605
2606 /**
2607 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
2608 * @adapter: board private structure
2609 **/
2610 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
2611 {
2612 switch (adapter->hw.mac.type) {
2613 case ixgbe_mac_82598EB:
2614 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
2615 break;
2616 case ixgbe_mac_82599EB:
2617 case ixgbe_mac_X540:
2618 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
2619 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
2620 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
2621 if (adapter->num_vfs > 32)
2622 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
2623 break;
2624 default:
2625 break;
2626 }
2627 IXGBE_WRITE_FLUSH(&adapter->hw);
2628 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2629 int i;
2630 for (i = 0; i < adapter->num_msix_vectors; i++)
2631 synchronize_irq(adapter->msix_entries[i].vector);
2632 } else {
2633 synchronize_irq(adapter->pdev->irq);
2634 }
2635 }
2636
2637 /**
2638 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
2639 *
2640 **/
2641 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
2642 {
2643 struct ixgbe_hw *hw = &adapter->hw;
2644
2645 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
2646 EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr_param));
2647
2648 ixgbe_set_ivar(adapter, 0, 0, 0);
2649 ixgbe_set_ivar(adapter, 1, 0, 0);
2650
2651 map_vector_to_rxq(adapter, 0, 0);
2652 map_vector_to_txq(adapter, 0, 0);
2653
2654 e_info(hw, "Legacy interrupt IVAR setup done\n");
2655 }
2656
2657 /**
2658 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
2659 * @adapter: board private structure
2660 * @ring: structure containing ring specific data
2661 *
2662 * Configure the Tx descriptor ring after a reset.
2663 **/
2664 void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
2665 struct ixgbe_ring *ring)
2666 {
2667 struct ixgbe_hw *hw = &adapter->hw;
2668 u64 tdba = ring->dma;
2669 int wait_loop = 10;
2670 u32 txdctl;
2671 u8 reg_idx = ring->reg_idx;
2672
2673 /* disable queue to avoid issues while updating state */
2674 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2675 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx),
2676 txdctl & ~IXGBE_TXDCTL_ENABLE);
2677 IXGBE_WRITE_FLUSH(hw);
2678
2679 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
2680 (tdba & DMA_BIT_MASK(32)));
2681 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
2682 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
2683 ring->count * sizeof(union ixgbe_adv_tx_desc));
2684 IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
2685 IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
2686 ring->tail = hw->hw_addr + IXGBE_TDT(reg_idx);
2687
2688 /* configure fetching thresholds */
2689 if (adapter->rx_itr_setting == 0) {
2690 /* cannot set wthresh when itr==0 */
2691 txdctl &= ~0x007F0000;
2692 } else {
2693 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
2694 txdctl |= (8 << 16);
2695 }
2696 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2697 /* PThresh workaround for Tx hang with DFP enabled. */
2698 txdctl |= 32;
2699 }
2700
2701 /* reinitialize flowdirector state */
2702 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
2703 adapter->atr_sample_rate) {
2704 ring->atr_sample_rate = adapter->atr_sample_rate;
2705 ring->atr_count = 0;
2706 set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state);
2707 } else {
2708 ring->atr_sample_rate = 0;
2709 }
2710
2711 clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state);
2712
2713 /* enable queue */
2714 txdctl |= IXGBE_TXDCTL_ENABLE;
2715 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
2716
2717 /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2718 if (hw->mac.type == ixgbe_mac_82598EB &&
2719 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2720 return;
2721
2722 /* poll to verify queue is enabled */
2723 do {
2724 msleep(1);
2725 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2726 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
2727 if (!wait_loop)
2728 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx);
2729 }
2730
2731 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
2732 {
2733 struct ixgbe_hw *hw = &adapter->hw;
2734 u32 rttdcs;
2735 u32 mask;
2736
2737 if (hw->mac.type == ixgbe_mac_82598EB)
2738 return;
2739
2740 /* disable the arbiter while setting MTQC */
2741 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
2742 rttdcs |= IXGBE_RTTDCS_ARBDIS;
2743 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2744
2745 /* set transmit pool layout */
2746 mask = (IXGBE_FLAG_SRIOV_ENABLED | IXGBE_FLAG_DCB_ENABLED);
2747 switch (adapter->flags & mask) {
2748
2749 case (IXGBE_FLAG_SRIOV_ENABLED):
2750 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2751 (IXGBE_MTQC_VT_ENA | IXGBE_MTQC_64VF));
2752 break;
2753
2754 case (IXGBE_FLAG_DCB_ENABLED):
2755 /* We enable 8 traffic classes, DCB only */
2756 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2757 (IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ));
2758 break;
2759
2760 default:
2761 IXGBE_WRITE_REG(hw, IXGBE_MTQC, IXGBE_MTQC_64Q_1PB);
2762 break;
2763 }
2764
2765 /* re-enable the arbiter */
2766 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
2767 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2768 }
2769
2770 /**
2771 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
2772 * @adapter: board private structure
2773 *
2774 * Configure the Tx unit of the MAC after a reset.
2775 **/
2776 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
2777 {
2778 struct ixgbe_hw *hw = &adapter->hw;
2779 u32 dmatxctl;
2780 u32 i;
2781
2782 ixgbe_setup_mtqc(adapter);
2783
2784 if (hw->mac.type != ixgbe_mac_82598EB) {
2785 /* DMATXCTL.EN must be before Tx queues are enabled */
2786 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2787 dmatxctl |= IXGBE_DMATXCTL_TE;
2788 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2789 }
2790
2791 /* Setup the HW Tx Head and Tail descriptor pointers */
2792 for (i = 0; i < adapter->num_tx_queues; i++)
2793 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
2794 }
2795
2796 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
2797
2798 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
2799 struct ixgbe_ring *rx_ring)
2800 {
2801 u32 srrctl;
2802 u8 reg_idx = rx_ring->reg_idx;
2803
2804 switch (adapter->hw.mac.type) {
2805 case ixgbe_mac_82598EB: {
2806 struct ixgbe_ring_feature *feature = adapter->ring_feature;
2807 const int mask = feature[RING_F_RSS].mask;
2808 reg_idx = reg_idx & mask;
2809 }
2810 break;
2811 case ixgbe_mac_82599EB:
2812 case ixgbe_mac_X540:
2813 default:
2814 break;
2815 }
2816
2817 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(reg_idx));
2818
2819 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
2820 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
2821 if (adapter->num_vfs)
2822 srrctl |= IXGBE_SRRCTL_DROP_EN;
2823
2824 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
2825 IXGBE_SRRCTL_BSIZEHDR_MASK;
2826
2827 if (ring_is_ps_enabled(rx_ring)) {
2828 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
2829 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2830 #else
2831 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2832 #endif
2833 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
2834 } else {
2835 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
2836 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2837 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
2838 }
2839
2840 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(reg_idx), srrctl);
2841 }
2842
2843 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
2844 {
2845 struct ixgbe_hw *hw = &adapter->hw;
2846 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2847 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2848 0x6A3E67EA, 0x14364D17, 0x3BED200D};
2849 u32 mrqc = 0, reta = 0;
2850 u32 rxcsum;
2851 int i, j;
2852 int mask;
2853
2854 /* Fill out hash function seeds */
2855 for (i = 0; i < 10; i++)
2856 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2857
2858 /* Fill out redirection table */
2859 for (i = 0, j = 0; i < 128; i++, j++) {
2860 if (j == adapter->ring_feature[RING_F_RSS].indices)
2861 j = 0;
2862 /* reta = 4-byte sliding window of
2863 * 0x00..(indices-1)(indices-1)00..etc. */
2864 reta = (reta << 8) | (j * 0x11);
2865 if ((i & 3) == 3)
2866 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2867 }
2868
2869 /* Disable indicating checksum in descriptor, enables RSS hash */
2870 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2871 rxcsum |= IXGBE_RXCSUM_PCSD;
2872 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2873
2874 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
2875 mask = adapter->flags & IXGBE_FLAG_RSS_ENABLED;
2876 else
2877 mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
2878 #ifdef CONFIG_IXGBE_DCB
2879 | IXGBE_FLAG_DCB_ENABLED
2880 #endif
2881 | IXGBE_FLAG_SRIOV_ENABLED
2882 );
2883
2884 switch (mask) {
2885 case (IXGBE_FLAG_RSS_ENABLED):
2886 mrqc = IXGBE_MRQC_RSSEN;
2887 break;
2888 case (IXGBE_FLAG_SRIOV_ENABLED):
2889 mrqc = IXGBE_MRQC_VMDQEN;
2890 break;
2891 #ifdef CONFIG_IXGBE_DCB
2892 case (IXGBE_FLAG_DCB_ENABLED):
2893 mrqc = IXGBE_MRQC_RT8TCEN;
2894 break;
2895 #endif /* CONFIG_IXGBE_DCB */
2896 default:
2897 break;
2898 }
2899
2900 /* Perform hash on these packet types */
2901 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2902 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2903 | IXGBE_MRQC_RSS_FIELD_IPV6
2904 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
2905
2906 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2907 }
2908
2909 /**
2910 * ixgbe_clear_rscctl - disable RSC for the indicated ring
2911 * @adapter: address of board private structure
2912 * @ring: structure containing ring specific data
2913 **/
2914 void ixgbe_clear_rscctl(struct ixgbe_adapter *adapter,
2915 struct ixgbe_ring *ring)
2916 {
2917 struct ixgbe_hw *hw = &adapter->hw;
2918 u32 rscctrl;
2919 u8 reg_idx = ring->reg_idx;
2920
2921 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
2922 rscctrl &= ~IXGBE_RSCCTL_RSCEN;
2923 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
2924 }
2925
2926 /**
2927 * ixgbe_configure_rscctl - enable RSC for the indicated ring
2928 * @adapter: address of board private structure
2929 * @index: index of ring to set
2930 **/
2931 void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
2932 struct ixgbe_ring *ring)
2933 {
2934 struct ixgbe_hw *hw = &adapter->hw;
2935 u32 rscctrl;
2936 int rx_buf_len;
2937 u8 reg_idx = ring->reg_idx;
2938
2939 if (!ring_is_rsc_enabled(ring))
2940 return;
2941
2942 rx_buf_len = ring->rx_buf_len;
2943 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
2944 rscctrl |= IXGBE_RSCCTL_RSCEN;
2945 /*
2946 * we must limit the number of descriptors so that the
2947 * total size of max desc * buf_len is not greater
2948 * than 65535
2949 */
2950 if (ring_is_ps_enabled(ring)) {
2951 #if (MAX_SKB_FRAGS > 16)
2952 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2953 #elif (MAX_SKB_FRAGS > 8)
2954 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2955 #elif (MAX_SKB_FRAGS > 4)
2956 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2957 #else
2958 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2959 #endif
2960 } else {
2961 if (rx_buf_len < IXGBE_RXBUFFER_4096)
2962 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2963 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
2964 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2965 else
2966 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2967 }
2968 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
2969 }
2970
2971 /**
2972 * ixgbe_set_uta - Set unicast filter table address
2973 * @adapter: board private structure
2974 *
2975 * The unicast table address is a register array of 32-bit registers.
2976 * The table is meant to be used in a way similar to how the MTA is used
2977 * however due to certain limitations in the hardware it is necessary to
2978 * set all the hash bits to 1 and use the VMOLR ROPE bit as a promiscuous
2979 * enable bit to allow vlan tag stripping when promiscuous mode is enabled
2980 **/
2981 static void ixgbe_set_uta(struct ixgbe_adapter *adapter)
2982 {
2983 struct ixgbe_hw *hw = &adapter->hw;
2984 int i;
2985
2986 /* The UTA table only exists on 82599 hardware and newer */
2987 if (hw->mac.type < ixgbe_mac_82599EB)
2988 return;
2989
2990 /* we only need to do this if VMDq is enabled */
2991 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
2992 return;
2993
2994 for (i = 0; i < 128; i++)
2995 IXGBE_WRITE_REG(hw, IXGBE_UTA(i), ~0);
2996 }
2997
2998 #define IXGBE_MAX_RX_DESC_POLL 10
2999 static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
3000 struct ixgbe_ring *ring)
3001 {
3002 struct ixgbe_hw *hw = &adapter->hw;
3003 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3004 u32 rxdctl;
3005 u8 reg_idx = ring->reg_idx;
3006
3007 /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
3008 if (hw->mac.type == ixgbe_mac_82598EB &&
3009 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3010 return;
3011
3012 do {
3013 msleep(1);
3014 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3015 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
3016
3017 if (!wait_loop) {
3018 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
3019 "the polling period\n", reg_idx);
3020 }
3021 }
3022
3023 void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
3024 struct ixgbe_ring *ring)
3025 {
3026 struct ixgbe_hw *hw = &adapter->hw;
3027 u64 rdba = ring->dma;
3028 u32 rxdctl;
3029 u8 reg_idx = ring->reg_idx;
3030
3031 /* disable queue to avoid issues while updating state */
3032 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3033 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx),
3034 rxdctl & ~IXGBE_RXDCTL_ENABLE);
3035 IXGBE_WRITE_FLUSH(hw);
3036
3037 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
3038 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
3039 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
3040 ring->count * sizeof(union ixgbe_adv_rx_desc));
3041 IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
3042 IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
3043 ring->tail = hw->hw_addr + IXGBE_RDT(reg_idx);
3044
3045 ixgbe_configure_srrctl(adapter, ring);
3046 ixgbe_configure_rscctl(adapter, ring);
3047
3048 if (hw->mac.type == ixgbe_mac_82598EB) {
3049 /*
3050 * enable cache line friendly hardware writes:
3051 * PTHRESH=32 descriptors (half the internal cache),
3052 * this also removes ugly rx_no_buffer_count increment
3053 * HTHRESH=4 descriptors (to minimize latency on fetch)
3054 * WTHRESH=8 burst writeback up to two cache lines
3055 */
3056 rxdctl &= ~0x3FFFFF;
3057 rxdctl |= 0x080420;
3058 }
3059
3060 /* enable receive descriptor ring */
3061 rxdctl |= IXGBE_RXDCTL_ENABLE;
3062 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3063
3064 ixgbe_rx_desc_queue_enable(adapter, ring);
3065 ixgbe_alloc_rx_buffers(ring, IXGBE_DESC_UNUSED(ring));
3066 }
3067
3068 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
3069 {
3070 struct ixgbe_hw *hw = &adapter->hw;
3071 int p;
3072
3073 /* PSRTYPE must be initialized in non 82598 adapters */
3074 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
3075 IXGBE_PSRTYPE_UDPHDR |
3076 IXGBE_PSRTYPE_IPV4HDR |
3077 IXGBE_PSRTYPE_L2HDR |
3078 IXGBE_PSRTYPE_IPV6HDR;
3079
3080 if (hw->mac.type == ixgbe_mac_82598EB)
3081 return;
3082
3083 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED)
3084 psrtype |= (adapter->num_rx_queues_per_pool << 29);
3085
3086 for (p = 0; p < adapter->num_rx_pools; p++)
3087 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(adapter->num_vfs + p),
3088 psrtype);
3089 }
3090
3091 static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
3092 {
3093 struct ixgbe_hw *hw = &adapter->hw;
3094 u32 gcr_ext;
3095 u32 vt_reg_bits;
3096 u32 reg_offset, vf_shift;
3097 u32 vmdctl;
3098
3099 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
3100 return;
3101
3102 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
3103 vt_reg_bits = IXGBE_VMD_CTL_VMDQ_EN | IXGBE_VT_CTL_REPLEN;
3104 vt_reg_bits |= (adapter->num_vfs << IXGBE_VT_CTL_POOL_SHIFT);
3105 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl | vt_reg_bits);
3106
3107 vf_shift = adapter->num_vfs % 32;
3108 reg_offset = (adapter->num_vfs > 32) ? 1 : 0;
3109
3110 /* Enable only the PF's pool for Tx/Rx */
3111 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (1 << vf_shift));
3112 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), 0);
3113 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (1 << vf_shift));
3114 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), 0);
3115 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
3116
3117 /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
3118 hw->mac.ops.set_vmdq(hw, 0, adapter->num_vfs);
3119
3120 /*
3121 * Set up VF register offsets for selected VT Mode,
3122 * i.e. 32 or 64 VFs for SR-IOV
3123 */
3124 gcr_ext = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
3125 gcr_ext |= IXGBE_GCR_EXT_MSIX_EN;
3126 gcr_ext |= IXGBE_GCR_EXT_VT_MODE_64;
3127 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
3128
3129 /* enable Tx loopback for VF/PF communication */
3130 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
3131 }
3132
3133 static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
3134 {
3135 struct ixgbe_hw *hw = &adapter->hw;
3136 struct net_device *netdev = adapter->netdev;
3137 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3138 int rx_buf_len;
3139 struct ixgbe_ring *rx_ring;
3140 int i;
3141 u32 mhadd, hlreg0;
3142
3143 /* Decide whether to use packet split mode or not */
3144 /* Do not use packet split if we're in SR-IOV Mode */
3145 if (!adapter->num_vfs)
3146 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
3147
3148 /* Set the RX buffer length according to the mode */
3149 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
3150 rx_buf_len = IXGBE_RX_HDR_SIZE;
3151 } else {
3152 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
3153 (netdev->mtu <= ETH_DATA_LEN))
3154 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
3155 else
3156 rx_buf_len = ALIGN(max_frame + VLAN_HLEN, 1024);
3157 }
3158
3159 #ifdef IXGBE_FCOE
3160 /* adjust max frame to be able to do baby jumbo for FCoE */
3161 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
3162 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
3163 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
3164
3165 #endif /* IXGBE_FCOE */
3166 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
3167 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
3168 mhadd &= ~IXGBE_MHADD_MFS_MASK;
3169 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
3170
3171 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
3172 }
3173
3174 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
3175 /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
3176 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
3177 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
3178
3179 /*
3180 * Setup the HW Rx Head and Tail Descriptor Pointers and
3181 * the Base and Length of the Rx Descriptor Ring
3182 */
3183 for (i = 0; i < adapter->num_rx_queues; i++) {
3184 rx_ring = adapter->rx_ring[i];
3185 rx_ring->rx_buf_len = rx_buf_len;
3186
3187 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
3188 set_ring_ps_enabled(rx_ring);
3189 else
3190 clear_ring_ps_enabled(rx_ring);
3191
3192 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
3193 set_ring_rsc_enabled(rx_ring);
3194 else
3195 clear_ring_rsc_enabled(rx_ring);
3196
3197 #ifdef IXGBE_FCOE
3198 if (netdev->features & NETIF_F_FCOE_MTU) {
3199 struct ixgbe_ring_feature *f;
3200 f = &adapter->ring_feature[RING_F_FCOE];
3201 if ((i >= f->mask) && (i < f->mask + f->indices)) {
3202 clear_ring_ps_enabled(rx_ring);
3203 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
3204 rx_ring->rx_buf_len =
3205 IXGBE_FCOE_JUMBO_FRAME_SIZE;
3206 } else if (!ring_is_rsc_enabled(rx_ring) &&
3207 !ring_is_ps_enabled(rx_ring)) {
3208 rx_ring->rx_buf_len =
3209 IXGBE_FCOE_JUMBO_FRAME_SIZE;
3210 }
3211 }
3212 #endif /* IXGBE_FCOE */
3213 }
3214 }
3215
3216 static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
3217 {
3218 struct ixgbe_hw *hw = &adapter->hw;
3219 u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
3220
3221 switch (hw->mac.type) {
3222 case ixgbe_mac_82598EB:
3223 /*
3224 * For VMDq support of different descriptor types or
3225 * buffer sizes through the use of multiple SRRCTL
3226 * registers, RDRXCTL.MVMEN must be set to 1
3227 *
3228 * also, the manual doesn't mention it clearly but DCA hints
3229 * will only use queue 0's tags unless this bit is set. Side
3230 * effects of setting this bit are only that SRRCTL must be
3231 * fully programmed [0..15]
3232 */
3233 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
3234 break;
3235 case ixgbe_mac_82599EB:
3236 case ixgbe_mac_X540:
3237 /* Disable RSC for ACK packets */
3238 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
3239 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
3240 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
3241 /* hardware requires some bits to be set by default */
3242 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
3243 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
3244 break;
3245 default:
3246 /* We should do nothing since we don't know this hardware */
3247 return;
3248 }
3249
3250 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
3251 }
3252
3253 /**
3254 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
3255 * @adapter: board private structure
3256 *
3257 * Configure the Rx unit of the MAC after a reset.
3258 **/
3259 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
3260 {
3261 struct ixgbe_hw *hw = &adapter->hw;
3262 int i;
3263 u32 rxctrl;
3264
3265 /* disable receives while setting up the descriptors */
3266 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3267 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3268
3269 ixgbe_setup_psrtype(adapter);
3270 ixgbe_setup_rdrxctl(adapter);
3271
3272 /* Program registers for the distribution of queues */
3273 ixgbe_setup_mrqc(adapter);
3274
3275 ixgbe_set_uta(adapter);
3276
3277 /* set_rx_buffer_len must be called before ring initialization */
3278 ixgbe_set_rx_buffer_len(adapter);
3279
3280 /*
3281 * Setup the HW Rx Head and Tail Descriptor Pointers and
3282 * the Base and Length of the Rx Descriptor Ring
3283 */
3284 for (i = 0; i < adapter->num_rx_queues; i++)
3285 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
3286
3287 /* disable drop enable for 82598 parts */
3288 if (hw->mac.type == ixgbe_mac_82598EB)
3289 rxctrl |= IXGBE_RXCTRL_DMBYPS;
3290
3291 /* enable all receives */
3292 rxctrl |= IXGBE_RXCTRL_RXEN;
3293 hw->mac.ops.enable_rx_dma(hw, rxctrl);
3294 }
3295
3296 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
3297 {
3298 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3299 struct ixgbe_hw *hw = &adapter->hw;
3300 int pool_ndx = adapter->num_vfs;
3301
3302 /* add VID to filter table */
3303 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, true);
3304 set_bit(vid, adapter->active_vlans);
3305 }
3306
3307 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
3308 {
3309 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3310 struct ixgbe_hw *hw = &adapter->hw;
3311 int pool_ndx = adapter->num_vfs;
3312
3313 /* remove VID from filter table */
3314 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, false);
3315 clear_bit(vid, adapter->active_vlans);
3316 }
3317
3318 /**
3319 * ixgbe_vlan_filter_disable - helper to disable hw vlan filtering
3320 * @adapter: driver data
3321 */
3322 static void ixgbe_vlan_filter_disable(struct ixgbe_adapter *adapter)
3323 {
3324 struct ixgbe_hw *hw = &adapter->hw;
3325 u32 vlnctrl;
3326
3327 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3328 vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
3329 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3330 }
3331
3332 /**
3333 * ixgbe_vlan_filter_enable - helper to enable hw vlan filtering
3334 * @adapter: driver data
3335 */
3336 static void ixgbe_vlan_filter_enable(struct ixgbe_adapter *adapter)
3337 {
3338 struct ixgbe_hw *hw = &adapter->hw;
3339 u32 vlnctrl;
3340
3341 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3342 vlnctrl |= IXGBE_VLNCTRL_VFE;
3343 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
3344 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3345 }
3346
3347 /**
3348 * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping
3349 * @adapter: driver data
3350 */
3351 static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
3352 {
3353 struct ixgbe_hw *hw = &adapter->hw;
3354 u32 vlnctrl;
3355 int i, j;
3356
3357 switch (hw->mac.type) {
3358 case ixgbe_mac_82598EB:
3359 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3360 vlnctrl &= ~IXGBE_VLNCTRL_VME;
3361 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3362 break;
3363 case ixgbe_mac_82599EB:
3364 case ixgbe_mac_X540:
3365 for (i = 0; i < adapter->num_rx_queues; i++) {
3366 j = adapter->rx_ring[i]->reg_idx;
3367 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3368 vlnctrl &= ~IXGBE_RXDCTL_VME;
3369 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3370 }
3371 break;
3372 default:
3373 break;
3374 }
3375 }
3376
3377 /**
3378 * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping
3379 * @adapter: driver data
3380 */
3381 static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
3382 {
3383 struct ixgbe_hw *hw = &adapter->hw;
3384 u32 vlnctrl;
3385 int i, j;
3386
3387 switch (hw->mac.type) {
3388 case ixgbe_mac_82598EB:
3389 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3390 vlnctrl |= IXGBE_VLNCTRL_VME;
3391 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3392 break;
3393 case ixgbe_mac_82599EB:
3394 case ixgbe_mac_X540:
3395 for (i = 0; i < adapter->num_rx_queues; i++) {
3396 j = adapter->rx_ring[i]->reg_idx;
3397 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3398 vlnctrl |= IXGBE_RXDCTL_VME;
3399 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3400 }
3401 break;
3402 default:
3403 break;
3404 }
3405 }
3406
3407 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
3408 {
3409 u16 vid;
3410
3411 ixgbe_vlan_rx_add_vid(adapter->netdev, 0);
3412
3413 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
3414 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
3415 }
3416
3417 /**
3418 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
3419 * @netdev: network interface device structure
3420 *
3421 * Writes unicast address list to the RAR table.
3422 * Returns: -ENOMEM on failure/insufficient address space
3423 * 0 on no addresses written
3424 * X on writing X addresses to the RAR table
3425 **/
3426 static int ixgbe_write_uc_addr_list(struct net_device *netdev)
3427 {
3428 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3429 struct ixgbe_hw *hw = &adapter->hw;
3430 unsigned int vfn = adapter->num_vfs;
3431 unsigned int rar_entries = hw->mac.num_rar_entries - (vfn + 1);
3432 int count = 0;
3433
3434 /* return ENOMEM indicating insufficient memory for addresses */
3435 if (netdev_uc_count(netdev) > rar_entries)
3436 return -ENOMEM;
3437
3438 if (!netdev_uc_empty(netdev) && rar_entries) {
3439 struct netdev_hw_addr *ha;
3440 /* return error if we do not support writing to RAR table */
3441 if (!hw->mac.ops.set_rar)
3442 return -ENOMEM;
3443
3444 netdev_for_each_uc_addr(ha, netdev) {
3445 if (!rar_entries)
3446 break;
3447 hw->mac.ops.set_rar(hw, rar_entries--, ha->addr,
3448 vfn, IXGBE_RAH_AV);
3449 count++;
3450 }
3451 }
3452 /* write the addresses in reverse order to avoid write combining */
3453 for (; rar_entries > 0 ; rar_entries--)
3454 hw->mac.ops.clear_rar(hw, rar_entries);
3455
3456 return count;
3457 }
3458
3459 /**
3460 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
3461 * @netdev: network interface device structure
3462 *
3463 * The set_rx_method entry point is called whenever the unicast/multicast
3464 * address list or the network interface flags are updated. This routine is
3465 * responsible for configuring the hardware for proper unicast, multicast and
3466 * promiscuous mode.
3467 **/
3468 void ixgbe_set_rx_mode(struct net_device *netdev)
3469 {
3470 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3471 struct ixgbe_hw *hw = &adapter->hw;
3472 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
3473 int count;
3474
3475 /* Check for Promiscuous and All Multicast modes */
3476
3477 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3478
3479 /* set all bits that we expect to always be set */
3480 fctrl |= IXGBE_FCTRL_BAM;
3481 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
3482 fctrl |= IXGBE_FCTRL_PMCF;
3483
3484 /* clear the bits we are changing the status of */
3485 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3486
3487 if (netdev->flags & IFF_PROMISC) {
3488 hw->addr_ctrl.user_set_promisc = true;
3489 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3490 vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_MPE);
3491 /* don't hardware filter vlans in promisc mode */
3492 ixgbe_vlan_filter_disable(adapter);
3493 } else {
3494 if (netdev->flags & IFF_ALLMULTI) {
3495 fctrl |= IXGBE_FCTRL_MPE;
3496 vmolr |= IXGBE_VMOLR_MPE;
3497 } else {
3498 /*
3499 * Write addresses to the MTA, if the attempt fails
3500 * then we should just turn on promiscous mode so
3501 * that we can at least receive multicast traffic
3502 */
3503 hw->mac.ops.update_mc_addr_list(hw, netdev);
3504 vmolr |= IXGBE_VMOLR_ROMPE;
3505 }
3506 ixgbe_vlan_filter_enable(adapter);
3507 hw->addr_ctrl.user_set_promisc = false;
3508 /*
3509 * Write addresses to available RAR registers, if there is not
3510 * sufficient space to store all the addresses then enable
3511 * unicast promiscous mode
3512 */
3513 count = ixgbe_write_uc_addr_list(netdev);
3514 if (count < 0) {
3515 fctrl |= IXGBE_FCTRL_UPE;
3516 vmolr |= IXGBE_VMOLR_ROPE;
3517 }
3518 }
3519
3520 if (adapter->num_vfs) {
3521 ixgbe_restore_vf_multicasts(adapter);
3522 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(adapter->num_vfs)) &
3523 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
3524 IXGBE_VMOLR_ROPE);
3525 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(adapter->num_vfs), vmolr);
3526 }
3527
3528 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
3529
3530 if (netdev->features & NETIF_F_HW_VLAN_RX)
3531 ixgbe_vlan_strip_enable(adapter);
3532 else
3533 ixgbe_vlan_strip_disable(adapter);
3534 }
3535
3536 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
3537 {
3538 int q_idx;
3539 struct ixgbe_q_vector *q_vector;
3540 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3541
3542 /* legacy and MSI only use one vector */
3543 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3544 q_vectors = 1;
3545
3546 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3547 struct napi_struct *napi;
3548 q_vector = adapter->q_vector[q_idx];
3549 napi = &q_vector->napi;
3550 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3551 if (!q_vector->rxr_count || !q_vector->txr_count) {
3552 if (q_vector->txr_count == 1)
3553 napi->poll = &ixgbe_clean_txonly;
3554 else if (q_vector->rxr_count == 1)
3555 napi->poll = &ixgbe_clean_rxonly;
3556 }
3557 }
3558
3559 napi_enable(napi);
3560 }
3561 }
3562
3563 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
3564 {
3565 int q_idx;
3566 struct ixgbe_q_vector *q_vector;
3567 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3568
3569 /* legacy and MSI only use one vector */
3570 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3571 q_vectors = 1;
3572
3573 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3574 q_vector = adapter->q_vector[q_idx];
3575 napi_disable(&q_vector->napi);
3576 }
3577 }
3578
3579 #ifdef CONFIG_IXGBE_DCB
3580 /*
3581 * ixgbe_configure_dcb - Configure DCB hardware
3582 * @adapter: ixgbe adapter struct
3583 *
3584 * This is called by the driver on open to configure the DCB hardware.
3585 * This is also called by the gennetlink interface when reconfiguring
3586 * the DCB state.
3587 */
3588 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
3589 {
3590 struct ixgbe_hw *hw = &adapter->hw;
3591 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3592
3593 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
3594 if (hw->mac.type == ixgbe_mac_82598EB)
3595 netif_set_gso_max_size(adapter->netdev, 65536);
3596 return;
3597 }
3598
3599 if (hw->mac.type == ixgbe_mac_82598EB)
3600 netif_set_gso_max_size(adapter->netdev, 32768);
3601
3602 #ifdef CONFIG_FCOE
3603 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
3604 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
3605 #endif
3606
3607 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3608 DCB_TX_CONFIG);
3609 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3610 DCB_RX_CONFIG);
3611
3612 /* Enable VLAN tag insert/strip */
3613 adapter->netdev->features |= NETIF_F_HW_VLAN_RX;
3614
3615 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
3616
3617 /* reconfigure the hardware */
3618 ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
3619 }
3620
3621 #endif
3622 static void ixgbe_configure(struct ixgbe_adapter *adapter)
3623 {
3624 struct net_device *netdev = adapter->netdev;
3625 struct ixgbe_hw *hw = &adapter->hw;
3626 int i;
3627
3628 #ifdef CONFIG_IXGBE_DCB
3629 ixgbe_configure_dcb(adapter);
3630 #endif
3631
3632 ixgbe_set_rx_mode(netdev);
3633 ixgbe_restore_vlan(adapter);
3634
3635 #ifdef IXGBE_FCOE
3636 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
3637 ixgbe_configure_fcoe(adapter);
3638
3639 #endif /* IXGBE_FCOE */
3640 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3641 for (i = 0; i < adapter->num_tx_queues; i++)
3642 adapter->tx_ring[i]->atr_sample_rate =
3643 adapter->atr_sample_rate;
3644 ixgbe_init_fdir_signature_82599(hw, adapter->fdir_pballoc);
3645 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
3646 ixgbe_init_fdir_perfect_82599(hw, adapter->fdir_pballoc);
3647 }
3648 ixgbe_configure_virtualization(adapter);
3649
3650 ixgbe_configure_tx(adapter);
3651 ixgbe_configure_rx(adapter);
3652 }
3653
3654 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
3655 {
3656 switch (hw->phy.type) {
3657 case ixgbe_phy_sfp_avago:
3658 case ixgbe_phy_sfp_ftl:
3659 case ixgbe_phy_sfp_intel:
3660 case ixgbe_phy_sfp_unknown:
3661 case ixgbe_phy_sfp_passive_tyco:
3662 case ixgbe_phy_sfp_passive_unknown:
3663 case ixgbe_phy_sfp_active_unknown:
3664 case ixgbe_phy_sfp_ftl_active:
3665 return true;
3666 default:
3667 return false;
3668 }
3669 }
3670
3671 /**
3672 * ixgbe_sfp_link_config - set up SFP+ link
3673 * @adapter: pointer to private adapter struct
3674 **/
3675 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
3676 {
3677 struct ixgbe_hw *hw = &adapter->hw;
3678
3679 if (hw->phy.multispeed_fiber) {
3680 /*
3681 * In multispeed fiber setups, the device may not have
3682 * had a physical connection when the driver loaded.
3683 * If that's the case, the initial link configuration
3684 * couldn't get the MAC into 10G or 1G mode, so we'll
3685 * never have a link status change interrupt fire.
3686 * We need to try and force an autonegotiation
3687 * session, then bring up link.
3688 */
3689 hw->mac.ops.setup_sfp(hw);
3690 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
3691 schedule_work(&adapter->multispeed_fiber_task);
3692 } else {
3693 /*
3694 * Direct Attach Cu and non-multispeed fiber modules
3695 * still need to be configured properly prior to
3696 * attempting link.
3697 */
3698 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_MOD_TASK))
3699 schedule_work(&adapter->sfp_config_module_task);
3700 }
3701 }
3702
3703 /**
3704 * ixgbe_non_sfp_link_config - set up non-SFP+ link
3705 * @hw: pointer to private hardware struct
3706 *
3707 * Returns 0 on success, negative on failure
3708 **/
3709 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
3710 {
3711 u32 autoneg;
3712 bool negotiation, link_up = false;
3713 u32 ret = IXGBE_ERR_LINK_SETUP;
3714
3715 if (hw->mac.ops.check_link)
3716 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
3717
3718 if (ret)
3719 goto link_cfg_out;
3720
3721 if (hw->mac.ops.get_link_capabilities)
3722 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg,
3723 &negotiation);
3724 if (ret)
3725 goto link_cfg_out;
3726
3727 if (hw->mac.ops.setup_link)
3728 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
3729 link_cfg_out:
3730 return ret;
3731 }
3732
3733 static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
3734 {
3735 struct ixgbe_hw *hw = &adapter->hw;
3736 u32 gpie = 0;
3737
3738 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3739 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
3740 IXGBE_GPIE_OCD;
3741 gpie |= IXGBE_GPIE_EIAME;
3742 /*
3743 * use EIAM to auto-mask when MSI-X interrupt is asserted
3744 * this saves a register write for every interrupt
3745 */
3746 switch (hw->mac.type) {
3747 case ixgbe_mac_82598EB:
3748 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3749 break;
3750 case ixgbe_mac_82599EB:
3751 case ixgbe_mac_X540:
3752 default:
3753 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
3754 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
3755 break;
3756 }
3757 } else {
3758 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
3759 * specifically only auto mask tx and rx interrupts */
3760 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3761 }
3762
3763 /* XXX: to interrupt immediately for EICS writes, enable this */
3764 /* gpie |= IXGBE_GPIE_EIMEN; */
3765
3766 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3767 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
3768 gpie |= IXGBE_GPIE_VTMODE_64;
3769 }
3770
3771 /* Enable fan failure interrupt */
3772 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
3773 gpie |= IXGBE_SDP1_GPIEN;
3774
3775 if (hw->mac.type == ixgbe_mac_82599EB)
3776 gpie |= IXGBE_SDP1_GPIEN;
3777 gpie |= IXGBE_SDP2_GPIEN;
3778
3779 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3780 }
3781
3782 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
3783 {
3784 struct ixgbe_hw *hw = &adapter->hw;
3785 int err;
3786 u32 ctrl_ext;
3787
3788 ixgbe_get_hw_control(adapter);
3789 ixgbe_setup_gpie(adapter);
3790
3791 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3792 ixgbe_configure_msix(adapter);
3793 else
3794 ixgbe_configure_msi_and_legacy(adapter);
3795
3796 /* enable the optics for both mult-speed fiber and 82599 SFP+ fiber */
3797 if (hw->mac.ops.enable_tx_laser &&
3798 ((hw->phy.multispeed_fiber) ||
3799 ((hw->phy.type == ixgbe_media_type_fiber) &&
3800 (hw->mac.type == ixgbe_mac_82599EB))))
3801 hw->mac.ops.enable_tx_laser(hw);
3802
3803 clear_bit(__IXGBE_DOWN, &adapter->state);
3804 ixgbe_napi_enable_all(adapter);
3805
3806 if (ixgbe_is_sfp(hw)) {
3807 ixgbe_sfp_link_config(adapter);
3808 } else {
3809 err = ixgbe_non_sfp_link_config(hw);
3810 if (err)
3811 e_err(probe, "link_config FAILED %d\n", err);
3812 }
3813
3814 /* clear any pending interrupts, may auto mask */
3815 IXGBE_READ_REG(hw, IXGBE_EICR);
3816 ixgbe_irq_enable(adapter, true, true);
3817
3818 /*
3819 * If this adapter has a fan, check to see if we had a failure
3820 * before we enabled the interrupt.
3821 */
3822 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
3823 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
3824 if (esdp & IXGBE_ESDP_SDP1)
3825 e_crit(drv, "Fan has stopped, replace the adapter\n");
3826 }
3827
3828 /*
3829 * For hot-pluggable SFP+ devices, a new SFP+ module may have
3830 * arrived before interrupts were enabled but after probe. Such
3831 * devices wouldn't have their type identified yet. We need to
3832 * kick off the SFP+ module setup first, then try to bring up link.
3833 * If we're not hot-pluggable SFP+, we just need to configure link
3834 * and bring it up.
3835 */
3836 if (hw->phy.type == ixgbe_phy_unknown)
3837 schedule_work(&adapter->sfp_config_module_task);
3838
3839 /* enable transmits */
3840 netif_tx_start_all_queues(adapter->netdev);
3841
3842 /* bring the link up in the watchdog, this could race with our first
3843 * link up interrupt but shouldn't be a problem */
3844 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
3845 adapter->link_check_timeout = jiffies;
3846 mod_timer(&adapter->watchdog_timer, jiffies);
3847
3848 /* Set PF Reset Done bit so PF/VF Mail Ops can work */
3849 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
3850 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
3851 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
3852
3853 return 0;
3854 }
3855
3856 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
3857 {
3858 WARN_ON(in_interrupt());
3859 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
3860 msleep(1);
3861 ixgbe_down(adapter);
3862 /*
3863 * If SR-IOV enabled then wait a bit before bringing the adapter
3864 * back up to give the VFs time to respond to the reset. The
3865 * two second wait is based upon the watchdog timer cycle in
3866 * the VF driver.
3867 */
3868 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3869 msleep(2000);
3870 ixgbe_up(adapter);
3871 clear_bit(__IXGBE_RESETTING, &adapter->state);
3872 }
3873
3874 int ixgbe_up(struct ixgbe_adapter *adapter)
3875 {
3876 /* hardware has been reset, we need to reload some things */
3877 ixgbe_configure(adapter);
3878
3879 return ixgbe_up_complete(adapter);
3880 }
3881
3882 void ixgbe_reset(struct ixgbe_adapter *adapter)
3883 {
3884 struct ixgbe_hw *hw = &adapter->hw;
3885 int err;
3886
3887 err = hw->mac.ops.init_hw(hw);
3888 switch (err) {
3889 case 0:
3890 case IXGBE_ERR_SFP_NOT_PRESENT:
3891 break;
3892 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
3893 e_dev_err("master disable timed out\n");
3894 break;
3895 case IXGBE_ERR_EEPROM_VERSION:
3896 /* We are running on a pre-production device, log a warning */
3897 e_dev_warn("This device is a pre-production adapter/LOM. "
3898 "Please be aware there may be issuesassociated with "
3899 "your hardware. If you are experiencing problems "
3900 "please contact your Intel or hardware "
3901 "representative who provided you with this "
3902 "hardware.\n");
3903 break;
3904 default:
3905 e_dev_err("Hardware Error: %d\n", err);
3906 }
3907
3908 /* reprogram the RAR[0] in case user changed it. */
3909 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
3910 IXGBE_RAH_AV);
3911 }
3912
3913 /**
3914 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
3915 * @rx_ring: ring to free buffers from
3916 **/
3917 static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring)
3918 {
3919 struct device *dev = rx_ring->dev;
3920 unsigned long size;
3921 u16 i;
3922
3923 /* ring already cleared, nothing to do */
3924 if (!rx_ring->rx_buffer_info)
3925 return;
3926
3927 /* Free all the Rx ring sk_buffs */
3928 for (i = 0; i < rx_ring->count; i++) {
3929 struct ixgbe_rx_buffer *rx_buffer_info;
3930
3931 rx_buffer_info = &rx_ring->rx_buffer_info[i];
3932 if (rx_buffer_info->dma) {
3933 dma_unmap_single(rx_ring->dev, rx_buffer_info->dma,
3934 rx_ring->rx_buf_len,
3935 DMA_FROM_DEVICE);
3936 rx_buffer_info->dma = 0;
3937 }
3938 if (rx_buffer_info->skb) {
3939 struct sk_buff *skb = rx_buffer_info->skb;
3940 rx_buffer_info->skb = NULL;
3941 do {
3942 struct sk_buff *this = skb;
3943 if (IXGBE_RSC_CB(this)->delay_unmap) {
3944 dma_unmap_single(dev,
3945 IXGBE_RSC_CB(this)->dma,
3946 rx_ring->rx_buf_len,
3947 DMA_FROM_DEVICE);
3948 IXGBE_RSC_CB(this)->dma = 0;
3949 IXGBE_RSC_CB(skb)->delay_unmap = false;
3950 }
3951 skb = skb->prev;
3952 dev_kfree_skb(this);
3953 } while (skb);
3954 }
3955 if (!rx_buffer_info->page)
3956 continue;
3957 if (rx_buffer_info->page_dma) {
3958 dma_unmap_page(dev, rx_buffer_info->page_dma,
3959 PAGE_SIZE / 2, DMA_FROM_DEVICE);
3960 rx_buffer_info->page_dma = 0;
3961 }
3962 put_page(rx_buffer_info->page);
3963 rx_buffer_info->page = NULL;
3964 rx_buffer_info->page_offset = 0;
3965 }
3966
3967 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
3968 memset(rx_ring->rx_buffer_info, 0, size);
3969
3970 /* Zero out the descriptor ring */
3971 memset(rx_ring->desc, 0, rx_ring->size);
3972
3973 rx_ring->next_to_clean = 0;
3974 rx_ring->next_to_use = 0;
3975 }
3976
3977 /**
3978 * ixgbe_clean_tx_ring - Free Tx Buffers
3979 * @tx_ring: ring to be cleaned
3980 **/
3981 static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
3982 {
3983 struct ixgbe_tx_buffer *tx_buffer_info;
3984 unsigned long size;
3985 u16 i;
3986
3987 /* ring already cleared, nothing to do */
3988 if (!tx_ring->tx_buffer_info)
3989 return;
3990
3991 /* Free all the Tx ring sk_buffs */
3992 for (i = 0; i < tx_ring->count; i++) {
3993 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3994 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
3995 }
3996
3997 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
3998 memset(tx_ring->tx_buffer_info, 0, size);
3999
4000 /* Zero out the descriptor ring */
4001 memset(tx_ring->desc, 0, tx_ring->size);
4002
4003 tx_ring->next_to_use = 0;
4004 tx_ring->next_to_clean = 0;
4005 }
4006
4007 /**
4008 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
4009 * @adapter: board private structure
4010 **/
4011 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
4012 {
4013 int i;
4014
4015 for (i = 0; i < adapter->num_rx_queues; i++)
4016 ixgbe_clean_rx_ring(adapter->rx_ring[i]);
4017 }
4018
4019 /**
4020 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
4021 * @adapter: board private structure
4022 **/
4023 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
4024 {
4025 int i;
4026
4027 for (i = 0; i < adapter->num_tx_queues; i++)
4028 ixgbe_clean_tx_ring(adapter->tx_ring[i]);
4029 }
4030
4031 void ixgbe_down(struct ixgbe_adapter *adapter)
4032 {
4033 struct net_device *netdev = adapter->netdev;
4034 struct ixgbe_hw *hw = &adapter->hw;
4035 u32 rxctrl;
4036 u32 txdctl;
4037 int i;
4038 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4039
4040 /* signal that we are down to the interrupt handler */
4041 set_bit(__IXGBE_DOWN, &adapter->state);
4042
4043 /* disable receive for all VFs and wait one second */
4044 if (adapter->num_vfs) {
4045 /* ping all the active vfs to let them know we are going down */
4046 ixgbe_ping_all_vfs(adapter);
4047
4048 /* Disable all VFTE/VFRE TX/RX */
4049 ixgbe_disable_tx_rx(adapter);
4050
4051 /* Mark all the VFs as inactive */
4052 for (i = 0 ; i < adapter->num_vfs; i++)
4053 adapter->vfinfo[i].clear_to_send = 0;
4054 }
4055
4056 /* disable receives */
4057 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
4058 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
4059
4060 IXGBE_WRITE_FLUSH(hw);
4061 msleep(10);
4062
4063 netif_tx_stop_all_queues(netdev);
4064
4065 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
4066 del_timer_sync(&adapter->sfp_timer);
4067 del_timer_sync(&adapter->watchdog_timer);
4068 cancel_work_sync(&adapter->watchdog_task);
4069
4070 netif_carrier_off(netdev);
4071 netif_tx_disable(netdev);
4072
4073 ixgbe_irq_disable(adapter);
4074
4075 ixgbe_napi_disable_all(adapter);
4076
4077 /* Cleanup the affinity_hint CPU mask memory and callback */
4078 for (i = 0; i < num_q_vectors; i++) {
4079 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
4080 /* clear the affinity_mask in the IRQ descriptor */
4081 irq_set_affinity_hint(adapter->msix_entries[i]. vector, NULL);
4082 /* release the CPU mask memory */
4083 free_cpumask_var(q_vector->affinity_mask);
4084 }
4085
4086 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
4087 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
4088 cancel_work_sync(&adapter->fdir_reinit_task);
4089
4090 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
4091 cancel_work_sync(&adapter->check_overtemp_task);
4092
4093 /* disable transmits in the hardware now that interrupts are off */
4094 for (i = 0; i < adapter->num_tx_queues; i++) {
4095 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
4096 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
4097 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx),
4098 (txdctl & ~IXGBE_TXDCTL_ENABLE));
4099 }
4100 /* Disable the Tx DMA engine on 82599 */
4101 switch (hw->mac.type) {
4102 case ixgbe_mac_82599EB:
4103 case ixgbe_mac_X540:
4104 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
4105 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
4106 ~IXGBE_DMATXCTL_TE));
4107 break;
4108 default:
4109 break;
4110 }
4111
4112 /* clear n-tuple filters that are cached */
4113 ethtool_ntuple_flush(netdev);
4114
4115 if (!pci_channel_offline(adapter->pdev))
4116 ixgbe_reset(adapter);
4117
4118 /* power down the optics for multispeed fiber and 82599 SFP+ fiber */
4119 if (hw->mac.ops.disable_tx_laser &&
4120 ((hw->phy.multispeed_fiber) ||
4121 ((hw->phy.type == ixgbe_media_type_fiber) &&
4122 (hw->mac.type == ixgbe_mac_82599EB))))
4123 hw->mac.ops.disable_tx_laser(hw);
4124
4125 ixgbe_clean_all_tx_rings(adapter);
4126 ixgbe_clean_all_rx_rings(adapter);
4127
4128 #ifdef CONFIG_IXGBE_DCA
4129 /* since we reset the hardware DCA settings were cleared */
4130 ixgbe_setup_dca(adapter);
4131 #endif
4132 }
4133
4134 /**
4135 * ixgbe_poll - NAPI Rx polling callback
4136 * @napi: structure for representing this polling device
4137 * @budget: how many packets driver is allowed to clean
4138 *
4139 * This function is used for legacy and MSI, NAPI mode
4140 **/
4141 static int ixgbe_poll(struct napi_struct *napi, int budget)
4142 {
4143 struct ixgbe_q_vector *q_vector =
4144 container_of(napi, struct ixgbe_q_vector, napi);
4145 struct ixgbe_adapter *adapter = q_vector->adapter;
4146 int tx_clean_complete, work_done = 0;
4147
4148 #ifdef CONFIG_IXGBE_DCA
4149 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
4150 ixgbe_update_dca(q_vector);
4151 #endif
4152
4153 tx_clean_complete = ixgbe_clean_tx_irq(q_vector, adapter->tx_ring[0]);
4154 ixgbe_clean_rx_irq(q_vector, adapter->rx_ring[0], &work_done, budget);
4155
4156 if (!tx_clean_complete)
4157 work_done = budget;
4158
4159 /* If budget not fully consumed, exit the polling mode */
4160 if (work_done < budget) {
4161 napi_complete(napi);
4162 if (adapter->rx_itr_setting & 1)
4163 ixgbe_set_itr(adapter);
4164 if (!test_bit(__IXGBE_DOWN, &adapter->state))
4165 ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
4166 }
4167 return work_done;
4168 }
4169
4170 /**
4171 * ixgbe_tx_timeout - Respond to a Tx Hang
4172 * @netdev: network interface device structure
4173 **/
4174 static void ixgbe_tx_timeout(struct net_device *netdev)
4175 {
4176 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4177
4178 adapter->tx_timeout_count++;
4179
4180 /* Do the reset outside of interrupt context */
4181 schedule_work(&adapter->reset_task);
4182 }
4183
4184 static void ixgbe_reset_task(struct work_struct *work)
4185 {
4186 struct ixgbe_adapter *adapter;
4187 adapter = container_of(work, struct ixgbe_adapter, reset_task);
4188
4189 /* If we're already down or resetting, just bail */
4190 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
4191 test_bit(__IXGBE_RESETTING, &adapter->state))
4192 return;
4193
4194 ixgbe_dump(adapter);
4195 netdev_err(adapter->netdev, "Reset adapter\n");
4196 ixgbe_reinit_locked(adapter);
4197 }
4198
4199 #ifdef CONFIG_IXGBE_DCB
4200 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
4201 {
4202 bool ret = false;
4203 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_DCB];
4204
4205 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
4206 return ret;
4207
4208 f->mask = 0x7 << 3;
4209 adapter->num_rx_queues = f->indices;
4210 adapter->num_tx_queues = f->indices;
4211 ret = true;
4212
4213 return ret;
4214 }
4215 #endif
4216
4217 /**
4218 * ixgbe_set_rss_queues: Allocate queues for RSS
4219 * @adapter: board private structure to initialize
4220 *
4221 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
4222 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
4223 *
4224 **/
4225 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
4226 {
4227 bool ret = false;
4228 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
4229
4230 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4231 f->mask = 0xF;
4232 adapter->num_rx_queues = f->indices;
4233 adapter->num_tx_queues = f->indices;
4234 ret = true;
4235 } else {
4236 ret = false;
4237 }
4238
4239 return ret;
4240 }
4241
4242 /**
4243 * ixgbe_set_fdir_queues: Allocate queues for Flow Director
4244 * @adapter: board private structure to initialize
4245 *
4246 * Flow Director is an advanced Rx filter, attempting to get Rx flows back
4247 * to the original CPU that initiated the Tx session. This runs in addition
4248 * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
4249 * Rx load across CPUs using RSS.
4250 *
4251 **/
4252 static inline bool ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
4253 {
4254 bool ret = false;
4255 struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
4256
4257 f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
4258 f_fdir->mask = 0;
4259
4260 /* Flow Director must have RSS enabled */
4261 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
4262 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
4263 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)))) {
4264 adapter->num_tx_queues = f_fdir->indices;
4265 adapter->num_rx_queues = f_fdir->indices;
4266 ret = true;
4267 } else {
4268 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4269 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4270 }
4271 return ret;
4272 }
4273
4274 #ifdef IXGBE_FCOE
4275 /**
4276 * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
4277 * @adapter: board private structure to initialize
4278 *
4279 * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
4280 * The ring feature mask is not used as a mask for FCoE, as it can take any 8
4281 * rx queues out of the max number of rx queues, instead, it is used as the
4282 * index of the first rx queue used by FCoE.
4283 *
4284 **/
4285 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
4286 {
4287 bool ret = false;
4288 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4289
4290 f->indices = min((int)num_online_cpus(), f->indices);
4291 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
4292 adapter->num_rx_queues = 1;
4293 adapter->num_tx_queues = 1;
4294 #ifdef CONFIG_IXGBE_DCB
4295 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4296 e_info(probe, "FCoE enabled with DCB\n");
4297 ixgbe_set_dcb_queues(adapter);
4298 }
4299 #endif
4300 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4301 e_info(probe, "FCoE enabled with RSS\n");
4302 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4303 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
4304 ixgbe_set_fdir_queues(adapter);
4305 else
4306 ixgbe_set_rss_queues(adapter);
4307 }
4308 /* adding FCoE rx rings to the end */
4309 f->mask = adapter->num_rx_queues;
4310 adapter->num_rx_queues += f->indices;
4311 adapter->num_tx_queues += f->indices;
4312
4313 ret = true;
4314 }
4315
4316 return ret;
4317 }
4318
4319 #endif /* IXGBE_FCOE */
4320 /**
4321 * ixgbe_set_sriov_queues: Allocate queues for IOV use
4322 * @adapter: board private structure to initialize
4323 *
4324 * IOV doesn't actually use anything, so just NAK the
4325 * request for now and let the other queue routines
4326 * figure out what to do.
4327 */
4328 static inline bool ixgbe_set_sriov_queues(struct ixgbe_adapter *adapter)
4329 {
4330 return false;
4331 }
4332
4333 /*
4334 * ixgbe_set_num_queues: Allocate queues for device, feature dependant
4335 * @adapter: board private structure to initialize
4336 *
4337 * This is the top level queue allocation routine. The order here is very
4338 * important, starting with the "most" number of features turned on at once,
4339 * and ending with the smallest set of features. This way large combinations
4340 * can be allocated if they're turned on, and smaller combinations are the
4341 * fallthrough conditions.
4342 *
4343 **/
4344 static int ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
4345 {
4346 /* Start with base case */
4347 adapter->num_rx_queues = 1;
4348 adapter->num_tx_queues = 1;
4349 adapter->num_rx_pools = adapter->num_rx_queues;
4350 adapter->num_rx_queues_per_pool = 1;
4351
4352 if (ixgbe_set_sriov_queues(adapter))
4353 goto done;
4354
4355 #ifdef IXGBE_FCOE
4356 if (ixgbe_set_fcoe_queues(adapter))
4357 goto done;
4358
4359 #endif /* IXGBE_FCOE */
4360 #ifdef CONFIG_IXGBE_DCB
4361 if (ixgbe_set_dcb_queues(adapter))
4362 goto done;
4363
4364 #endif
4365 if (ixgbe_set_fdir_queues(adapter))
4366 goto done;
4367
4368 if (ixgbe_set_rss_queues(adapter))
4369 goto done;
4370
4371 /* fallback to base case */
4372 adapter->num_rx_queues = 1;
4373 adapter->num_tx_queues = 1;
4374
4375 done:
4376 /* Notify the stack of the (possibly) reduced queue counts. */
4377 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
4378 return netif_set_real_num_rx_queues(adapter->netdev,
4379 adapter->num_rx_queues);
4380 }
4381
4382 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
4383 int vectors)
4384 {
4385 int err, vector_threshold;
4386
4387 /* We'll want at least 3 (vector_threshold):
4388 * 1) TxQ[0] Cleanup
4389 * 2) RxQ[0] Cleanup
4390 * 3) Other (Link Status Change, etc.)
4391 * 4) TCP Timer (optional)
4392 */
4393 vector_threshold = MIN_MSIX_COUNT;
4394
4395 /* The more we get, the more we will assign to Tx/Rx Cleanup
4396 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
4397 * Right now, we simply care about how many we'll get; we'll
4398 * set them up later while requesting irq's.
4399 */
4400 while (vectors >= vector_threshold) {
4401 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
4402 vectors);
4403 if (!err) /* Success in acquiring all requested vectors. */
4404 break;
4405 else if (err < 0)
4406 vectors = 0; /* Nasty failure, quit now */
4407 else /* err == number of vectors we should try again with */
4408 vectors = err;
4409 }
4410
4411 if (vectors < vector_threshold) {
4412 /* Can't allocate enough MSI-X interrupts? Oh well.
4413 * This just means we'll go with either a single MSI
4414 * vector or fall back to legacy interrupts.
4415 */
4416 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4417 "Unable to allocate MSI-X interrupts\n");
4418 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4419 kfree(adapter->msix_entries);
4420 adapter->msix_entries = NULL;
4421 } else {
4422 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
4423 /*
4424 * Adjust for only the vectors we'll use, which is minimum
4425 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
4426 * vectors we were allocated.
4427 */
4428 adapter->num_msix_vectors = min(vectors,
4429 adapter->max_msix_q_vectors + NON_Q_VECTORS);
4430 }
4431 }
4432
4433 /**
4434 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
4435 * @adapter: board private structure to initialize
4436 *
4437 * Cache the descriptor ring offsets for RSS to the assigned rings.
4438 *
4439 **/
4440 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
4441 {
4442 int i;
4443
4444 if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED))
4445 return false;
4446
4447 for (i = 0; i < adapter->num_rx_queues; i++)
4448 adapter->rx_ring[i]->reg_idx = i;
4449 for (i = 0; i < adapter->num_tx_queues; i++)
4450 adapter->tx_ring[i]->reg_idx = i;
4451
4452 return true;
4453 }
4454
4455 #ifdef CONFIG_IXGBE_DCB
4456 /**
4457 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
4458 * @adapter: board private structure to initialize
4459 *
4460 * Cache the descriptor ring offsets for DCB to the assigned rings.
4461 *
4462 **/
4463 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
4464 {
4465 int i;
4466 bool ret = false;
4467 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
4468
4469 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
4470 return false;
4471
4472 /* the number of queues is assumed to be symmetric */
4473 switch (adapter->hw.mac.type) {
4474 case ixgbe_mac_82598EB:
4475 for (i = 0; i < dcb_i; i++) {
4476 adapter->rx_ring[i]->reg_idx = i << 3;
4477 adapter->tx_ring[i]->reg_idx = i << 2;
4478 }
4479 ret = true;
4480 break;
4481 case ixgbe_mac_82599EB:
4482 case ixgbe_mac_X540:
4483 if (dcb_i == 8) {
4484 /*
4485 * Tx TC0 starts at: descriptor queue 0
4486 * Tx TC1 starts at: descriptor queue 32
4487 * Tx TC2 starts at: descriptor queue 64
4488 * Tx TC3 starts at: descriptor queue 80
4489 * Tx TC4 starts at: descriptor queue 96
4490 * Tx TC5 starts at: descriptor queue 104
4491 * Tx TC6 starts at: descriptor queue 112
4492 * Tx TC7 starts at: descriptor queue 120
4493 *
4494 * Rx TC0-TC7 are offset by 16 queues each
4495 */
4496 for (i = 0; i < 3; i++) {
4497 adapter->tx_ring[i]->reg_idx = i << 5;
4498 adapter->rx_ring[i]->reg_idx = i << 4;
4499 }
4500 for ( ; i < 5; i++) {
4501 adapter->tx_ring[i]->reg_idx = ((i + 2) << 4);
4502 adapter->rx_ring[i]->reg_idx = i << 4;
4503 }
4504 for ( ; i < dcb_i; i++) {
4505 adapter->tx_ring[i]->reg_idx = ((i + 8) << 3);
4506 adapter->rx_ring[i]->reg_idx = i << 4;
4507 }
4508 ret = true;
4509 } else if (dcb_i == 4) {
4510 /*
4511 * Tx TC0 starts at: descriptor queue 0
4512 * Tx TC1 starts at: descriptor queue 64
4513 * Tx TC2 starts at: descriptor queue 96
4514 * Tx TC3 starts at: descriptor queue 112
4515 *
4516 * Rx TC0-TC3 are offset by 32 queues each
4517 */
4518 adapter->tx_ring[0]->reg_idx = 0;
4519 adapter->tx_ring[1]->reg_idx = 64;
4520 adapter->tx_ring[2]->reg_idx = 96;
4521 adapter->tx_ring[3]->reg_idx = 112;
4522 for (i = 0 ; i < dcb_i; i++)
4523 adapter->rx_ring[i]->reg_idx = i << 5;
4524 ret = true;
4525 }
4526 break;
4527 default:
4528 break;
4529 }
4530 return ret;
4531 }
4532 #endif
4533
4534 /**
4535 * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
4536 * @adapter: board private structure to initialize
4537 *
4538 * Cache the descriptor ring offsets for Flow Director to the assigned rings.
4539 *
4540 **/
4541 static inline bool ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
4542 {
4543 int i;
4544 bool ret = false;
4545
4546 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
4547 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4548 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))) {
4549 for (i = 0; i < adapter->num_rx_queues; i++)
4550 adapter->rx_ring[i]->reg_idx = i;
4551 for (i = 0; i < adapter->num_tx_queues; i++)
4552 adapter->tx_ring[i]->reg_idx = i;
4553 ret = true;
4554 }
4555
4556 return ret;
4557 }
4558
4559 #ifdef IXGBE_FCOE
4560 /**
4561 * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
4562 * @adapter: board private structure to initialize
4563 *
4564 * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
4565 *
4566 */
4567 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
4568 {
4569 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4570 int i;
4571 u8 fcoe_rx_i = 0, fcoe_tx_i = 0;
4572
4573 if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
4574 return false;
4575
4576 #ifdef CONFIG_IXGBE_DCB
4577 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4578 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
4579
4580 ixgbe_cache_ring_dcb(adapter);
4581 /* find out queues in TC for FCoE */
4582 fcoe_rx_i = adapter->rx_ring[fcoe->tc]->reg_idx + 1;
4583 fcoe_tx_i = adapter->tx_ring[fcoe->tc]->reg_idx + 1;
4584 /*
4585 * In 82599, the number of Tx queues for each traffic
4586 * class for both 8-TC and 4-TC modes are:
4587 * TCs : TC0 TC1 TC2 TC3 TC4 TC5 TC6 TC7
4588 * 8 TCs: 32 32 16 16 8 8 8 8
4589 * 4 TCs: 64 64 32 32
4590 * We have max 8 queues for FCoE, where 8 the is
4591 * FCoE redirection table size. If TC for FCoE is
4592 * less than or equal to TC3, we have enough queues
4593 * to add max of 8 queues for FCoE, so we start FCoE
4594 * Tx queue from the next one, i.e., reg_idx + 1.
4595 * If TC for FCoE is above TC3, implying 8 TC mode,
4596 * and we need 8 for FCoE, we have to take all queues
4597 * in that traffic class for FCoE.
4598 */
4599 if ((f->indices == IXGBE_FCRETA_SIZE) && (fcoe->tc > 3))
4600 fcoe_tx_i--;
4601 }
4602 #endif /* CONFIG_IXGBE_DCB */
4603 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4604 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4605 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
4606 ixgbe_cache_ring_fdir(adapter);
4607 else
4608 ixgbe_cache_ring_rss(adapter);
4609
4610 fcoe_rx_i = f->mask;
4611 fcoe_tx_i = f->mask;
4612 }
4613 for (i = 0; i < f->indices; i++, fcoe_rx_i++, fcoe_tx_i++) {
4614 adapter->rx_ring[f->mask + i]->reg_idx = fcoe_rx_i;
4615 adapter->tx_ring[f->mask + i]->reg_idx = fcoe_tx_i;
4616 }
4617 return true;
4618 }
4619
4620 #endif /* IXGBE_FCOE */
4621 /**
4622 * ixgbe_cache_ring_sriov - Descriptor ring to register mapping for sriov
4623 * @adapter: board private structure to initialize
4624 *
4625 * SR-IOV doesn't use any descriptor rings but changes the default if
4626 * no other mapping is used.
4627 *
4628 */
4629 static inline bool ixgbe_cache_ring_sriov(struct ixgbe_adapter *adapter)
4630 {
4631 adapter->rx_ring[0]->reg_idx = adapter->num_vfs * 2;
4632 adapter->tx_ring[0]->reg_idx = adapter->num_vfs * 2;
4633 if (adapter->num_vfs)
4634 return true;
4635 else
4636 return false;
4637 }
4638
4639 /**
4640 * ixgbe_cache_ring_register - Descriptor ring to register mapping
4641 * @adapter: board private structure to initialize
4642 *
4643 * Once we know the feature-set enabled for the device, we'll cache
4644 * the register offset the descriptor ring is assigned to.
4645 *
4646 * Note, the order the various feature calls is important. It must start with
4647 * the "most" features enabled at the same time, then trickle down to the
4648 * least amount of features turned on at once.
4649 **/
4650 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
4651 {
4652 /* start with default case */
4653 adapter->rx_ring[0]->reg_idx = 0;
4654 adapter->tx_ring[0]->reg_idx = 0;
4655
4656 if (ixgbe_cache_ring_sriov(adapter))
4657 return;
4658
4659 #ifdef IXGBE_FCOE
4660 if (ixgbe_cache_ring_fcoe(adapter))
4661 return;
4662
4663 #endif /* IXGBE_FCOE */
4664 #ifdef CONFIG_IXGBE_DCB
4665 if (ixgbe_cache_ring_dcb(adapter))
4666 return;
4667
4668 #endif
4669 if (ixgbe_cache_ring_fdir(adapter))
4670 return;
4671
4672 if (ixgbe_cache_ring_rss(adapter))
4673 return;
4674 }
4675
4676 /**
4677 * ixgbe_alloc_queues - Allocate memory for all rings
4678 * @adapter: board private structure to initialize
4679 *
4680 * We allocate one ring per queue at run-time since we don't know the
4681 * number of queues at compile-time. The polling_netdev array is
4682 * intended for Multiqueue, but should work fine with a single queue.
4683 **/
4684 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
4685 {
4686 int rx = 0, tx = 0, nid = adapter->node;
4687
4688 if (nid < 0 || !node_online(nid))
4689 nid = first_online_node;
4690
4691 for (; tx < adapter->num_tx_queues; tx++) {
4692 struct ixgbe_ring *ring;
4693
4694 ring = kzalloc_node(sizeof(*ring), GFP_KERNEL, nid);
4695 if (!ring)
4696 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
4697 if (!ring)
4698 goto err_allocation;
4699 ring->count = adapter->tx_ring_count;
4700 ring->queue_index = tx;
4701 ring->numa_node = nid;
4702 ring->dev = &adapter->pdev->dev;
4703 ring->netdev = adapter->netdev;
4704
4705 adapter->tx_ring[tx] = ring;
4706 }
4707
4708 for (; rx < adapter->num_rx_queues; rx++) {
4709 struct ixgbe_ring *ring;
4710
4711 ring = kzalloc_node(sizeof(*ring), GFP_KERNEL, nid);
4712 if (!ring)
4713 ring = kzalloc(sizeof(*ring), GFP_KERNEL);
4714 if (!ring)
4715 goto err_allocation;
4716 ring->count = adapter->rx_ring_count;
4717 ring->queue_index = rx;
4718 ring->numa_node = nid;
4719 ring->dev = &adapter->pdev->dev;
4720 ring->netdev = adapter->netdev;
4721
4722 adapter->rx_ring[rx] = ring;
4723 }
4724
4725 ixgbe_cache_ring_register(adapter);
4726
4727 return 0;
4728
4729 err_allocation:
4730 while (tx)
4731 kfree(adapter->tx_ring[--tx]);
4732
4733 while (rx)
4734 kfree(adapter->rx_ring[--rx]);
4735 return -ENOMEM;
4736 }
4737
4738 /**
4739 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
4740 * @adapter: board private structure to initialize
4741 *
4742 * Attempt to configure the interrupts using the best available
4743 * capabilities of the hardware and the kernel.
4744 **/
4745 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
4746 {
4747 struct ixgbe_hw *hw = &adapter->hw;
4748 int err = 0;
4749 int vector, v_budget;
4750
4751 /*
4752 * It's easy to be greedy for MSI-X vectors, but it really
4753 * doesn't do us much good if we have a lot more vectors
4754 * than CPU's. So let's be conservative and only ask for
4755 * (roughly) the same number of vectors as there are CPU's.
4756 */
4757 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
4758 (int)num_online_cpus()) + NON_Q_VECTORS;
4759
4760 /*
4761 * At the same time, hardware can only support a maximum of
4762 * hw.mac->max_msix_vectors vectors. With features
4763 * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
4764 * descriptor queues supported by our device. Thus, we cap it off in
4765 * those rare cases where the cpu count also exceeds our vector limit.
4766 */
4767 v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
4768
4769 /* A failure in MSI-X entry allocation isn't fatal, but it does
4770 * mean we disable MSI-X capabilities of the adapter. */
4771 adapter->msix_entries = kcalloc(v_budget,
4772 sizeof(struct msix_entry), GFP_KERNEL);
4773 if (adapter->msix_entries) {
4774 for (vector = 0; vector < v_budget; vector++)
4775 adapter->msix_entries[vector].entry = vector;
4776
4777 ixgbe_acquire_msix_vectors(adapter, v_budget);
4778
4779 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4780 goto out;
4781 }
4782
4783 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
4784 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
4785 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4786 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4787 adapter->atr_sample_rate = 0;
4788 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4789 ixgbe_disable_sriov(adapter);
4790
4791 err = ixgbe_set_num_queues(adapter);
4792 if (err)
4793 return err;
4794
4795 err = pci_enable_msi(adapter->pdev);
4796 if (!err) {
4797 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
4798 } else {
4799 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4800 "Unable to allocate MSI interrupt, "
4801 "falling back to legacy. Error: %d\n", err);
4802 /* reset err */
4803 err = 0;
4804 }
4805
4806 out:
4807 return err;
4808 }
4809
4810 /**
4811 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
4812 * @adapter: board private structure to initialize
4813 *
4814 * We allocate one q_vector per queue interrupt. If allocation fails we
4815 * return -ENOMEM.
4816 **/
4817 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
4818 {
4819 int q_idx, num_q_vectors;
4820 struct ixgbe_q_vector *q_vector;
4821 int napi_vectors;
4822 int (*poll)(struct napi_struct *, int);
4823
4824 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4825 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4826 napi_vectors = adapter->num_rx_queues;
4827 poll = &ixgbe_clean_rxtx_many;
4828 } else {
4829 num_q_vectors = 1;
4830 napi_vectors = 1;
4831 poll = &ixgbe_poll;
4832 }
4833
4834 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4835 q_vector = kzalloc_node(sizeof(struct ixgbe_q_vector),
4836 GFP_KERNEL, adapter->node);
4837 if (!q_vector)
4838 q_vector = kzalloc(sizeof(struct ixgbe_q_vector),
4839 GFP_KERNEL);
4840 if (!q_vector)
4841 goto err_out;
4842 q_vector->adapter = adapter;
4843 if (q_vector->txr_count && !q_vector->rxr_count)
4844 q_vector->eitr = adapter->tx_eitr_param;
4845 else
4846 q_vector->eitr = adapter->rx_eitr_param;
4847 q_vector->v_idx = q_idx;
4848 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
4849 adapter->q_vector[q_idx] = q_vector;
4850 }
4851
4852 return 0;
4853
4854 err_out:
4855 while (q_idx) {
4856 q_idx--;
4857 q_vector = adapter->q_vector[q_idx];
4858 netif_napi_del(&q_vector->napi);
4859 kfree(q_vector);
4860 adapter->q_vector[q_idx] = NULL;
4861 }
4862 return -ENOMEM;
4863 }
4864
4865 /**
4866 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
4867 * @adapter: board private structure to initialize
4868 *
4869 * This function frees the memory allocated to the q_vectors. In addition if
4870 * NAPI is enabled it will delete any references to the NAPI struct prior
4871 * to freeing the q_vector.
4872 **/
4873 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
4874 {
4875 int q_idx, num_q_vectors;
4876
4877 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4878 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4879 else
4880 num_q_vectors = 1;
4881
4882 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4883 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
4884 adapter->q_vector[q_idx] = NULL;
4885 netif_napi_del(&q_vector->napi);
4886 kfree(q_vector);
4887 }
4888 }
4889
4890 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
4891 {
4892 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4893 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4894 pci_disable_msix(adapter->pdev);
4895 kfree(adapter->msix_entries);
4896 adapter->msix_entries = NULL;
4897 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
4898 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
4899 pci_disable_msi(adapter->pdev);
4900 }
4901 }
4902
4903 /**
4904 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
4905 * @adapter: board private structure to initialize
4906 *
4907 * We determine which interrupt scheme to use based on...
4908 * - Kernel support (MSI, MSI-X)
4909 * - which can be user-defined (via MODULE_PARAM)
4910 * - Hardware queue count (num_*_queues)
4911 * - defined by miscellaneous hardware support/features (RSS, etc.)
4912 **/
4913 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
4914 {
4915 int err;
4916
4917 /* Number of supported queues */
4918 err = ixgbe_set_num_queues(adapter);
4919 if (err)
4920 return err;
4921
4922 err = ixgbe_set_interrupt_capability(adapter);
4923 if (err) {
4924 e_dev_err("Unable to setup interrupt capabilities\n");
4925 goto err_set_interrupt;
4926 }
4927
4928 err = ixgbe_alloc_q_vectors(adapter);
4929 if (err) {
4930 e_dev_err("Unable to allocate memory for queue vectors\n");
4931 goto err_alloc_q_vectors;
4932 }
4933
4934 err = ixgbe_alloc_queues(adapter);
4935 if (err) {
4936 e_dev_err("Unable to allocate memory for queues\n");
4937 goto err_alloc_queues;
4938 }
4939
4940 e_dev_info("Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u\n",
4941 (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
4942 adapter->num_rx_queues, adapter->num_tx_queues);
4943
4944 set_bit(__IXGBE_DOWN, &adapter->state);
4945
4946 return 0;
4947
4948 err_alloc_queues:
4949 ixgbe_free_q_vectors(adapter);
4950 err_alloc_q_vectors:
4951 ixgbe_reset_interrupt_capability(adapter);
4952 err_set_interrupt:
4953 return err;
4954 }
4955
4956 static void ring_free_rcu(struct rcu_head *head)
4957 {
4958 kfree(container_of(head, struct ixgbe_ring, rcu));
4959 }
4960
4961 /**
4962 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
4963 * @adapter: board private structure to clear interrupt scheme on
4964 *
4965 * We go through and clear interrupt specific resources and reset the structure
4966 * to pre-load conditions
4967 **/
4968 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
4969 {
4970 int i;
4971
4972 for (i = 0; i < adapter->num_tx_queues; i++) {
4973 kfree(adapter->tx_ring[i]);
4974 adapter->tx_ring[i] = NULL;
4975 }
4976 for (i = 0; i < adapter->num_rx_queues; i++) {
4977 struct ixgbe_ring *ring = adapter->rx_ring[i];
4978
4979 /* ixgbe_get_stats64() might access this ring, we must wait
4980 * a grace period before freeing it.
4981 */
4982 call_rcu(&ring->rcu, ring_free_rcu);
4983 adapter->rx_ring[i] = NULL;
4984 }
4985
4986 ixgbe_free_q_vectors(adapter);
4987 ixgbe_reset_interrupt_capability(adapter);
4988 }
4989
4990 /**
4991 * ixgbe_sfp_timer - worker thread to find a missing module
4992 * @data: pointer to our adapter struct
4993 **/
4994 static void ixgbe_sfp_timer(unsigned long data)
4995 {
4996 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4997
4998 /*
4999 * Do the sfp_timer outside of interrupt context due to the
5000 * delays that sfp+ detection requires
5001 */
5002 schedule_work(&adapter->sfp_task);
5003 }
5004
5005 /**
5006 * ixgbe_sfp_task - worker thread to find a missing module
5007 * @work: pointer to work_struct containing our data
5008 **/
5009 static void ixgbe_sfp_task(struct work_struct *work)
5010 {
5011 struct ixgbe_adapter *adapter = container_of(work,
5012 struct ixgbe_adapter,
5013 sfp_task);
5014 struct ixgbe_hw *hw = &adapter->hw;
5015
5016 if ((hw->phy.type == ixgbe_phy_nl) &&
5017 (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
5018 s32 ret = hw->phy.ops.identify_sfp(hw);
5019 if (ret == IXGBE_ERR_SFP_NOT_PRESENT)
5020 goto reschedule;
5021 ret = hw->phy.ops.reset(hw);
5022 if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5023 e_dev_err("failed to initialize because an unsupported "
5024 "SFP+ module type was detected.\n");
5025 e_dev_err("Reload the driver after installing a "
5026 "supported module.\n");
5027 unregister_netdev(adapter->netdev);
5028 } else {
5029 e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
5030 }
5031 /* don't need this routine any more */
5032 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5033 }
5034 return;
5035 reschedule:
5036 if (test_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state))
5037 mod_timer(&adapter->sfp_timer,
5038 round_jiffies(jiffies + (2 * HZ)));
5039 }
5040
5041 /**
5042 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
5043 * @adapter: board private structure to initialize
5044 *
5045 * ixgbe_sw_init initializes the Adapter private data structure.
5046 * Fields are initialized based on PCI device information and
5047 * OS network device settings (MTU size).
5048 **/
5049 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
5050 {
5051 struct ixgbe_hw *hw = &adapter->hw;
5052 struct pci_dev *pdev = adapter->pdev;
5053 struct net_device *dev = adapter->netdev;
5054 unsigned int rss;
5055 #ifdef CONFIG_IXGBE_DCB
5056 int j;
5057 struct tc_configuration *tc;
5058 #endif
5059 int max_frame = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
5060
5061 /* PCI config space info */
5062
5063 hw->vendor_id = pdev->vendor;
5064 hw->device_id = pdev->device;
5065 hw->revision_id = pdev->revision;
5066 hw->subsystem_vendor_id = pdev->subsystem_vendor;
5067 hw->subsystem_device_id = pdev->subsystem_device;
5068
5069 /* Set capability flags */
5070 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
5071 adapter->ring_feature[RING_F_RSS].indices = rss;
5072 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
5073 adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
5074 switch (hw->mac.type) {
5075 case ixgbe_mac_82598EB:
5076 if (hw->device_id == IXGBE_DEV_ID_82598AT)
5077 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
5078 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
5079 break;
5080 case ixgbe_mac_82599EB:
5081 case ixgbe_mac_X540:
5082 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
5083 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
5084 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
5085 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
5086 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
5087 if (dev->features & NETIF_F_NTUPLE) {
5088 /* Flow Director perfect filter enabled */
5089 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
5090 adapter->atr_sample_rate = 0;
5091 spin_lock_init(&adapter->fdir_perfect_lock);
5092 } else {
5093 /* Flow Director hash filters enabled */
5094 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
5095 adapter->atr_sample_rate = 20;
5096 }
5097 adapter->ring_feature[RING_F_FDIR].indices =
5098 IXGBE_MAX_FDIR_INDICES;
5099 adapter->fdir_pballoc = 0;
5100 #ifdef IXGBE_FCOE
5101 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
5102 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
5103 adapter->ring_feature[RING_F_FCOE].indices = 0;
5104 #ifdef CONFIG_IXGBE_DCB
5105 /* Default traffic class to use for FCoE */
5106 adapter->fcoe.tc = IXGBE_FCOE_DEFTC;
5107 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
5108 #endif
5109 #endif /* IXGBE_FCOE */
5110 break;
5111 default:
5112 break;
5113 }
5114
5115 #ifdef CONFIG_IXGBE_DCB
5116 /* Configure DCB traffic classes */
5117 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
5118 tc = &adapter->dcb_cfg.tc_config[j];
5119 tc->path[DCB_TX_CONFIG].bwg_id = 0;
5120 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
5121 tc->path[DCB_RX_CONFIG].bwg_id = 0;
5122 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
5123 tc->dcb_pfc = pfc_disabled;
5124 }
5125 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
5126 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
5127 adapter->dcb_cfg.rx_pba_cfg = pba_equal;
5128 adapter->dcb_cfg.pfc_mode_enable = false;
5129 adapter->dcb_cfg.round_robin_enable = false;
5130 adapter->dcb_set_bitmap = 0x00;
5131 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
5132 adapter->ring_feature[RING_F_DCB].indices);
5133
5134 #endif
5135
5136 /* default flow control settings */
5137 hw->fc.requested_mode = ixgbe_fc_full;
5138 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
5139 #ifdef CONFIG_DCB
5140 adapter->last_lfc_mode = hw->fc.current_mode;
5141 #endif
5142 hw->fc.high_water = FC_HIGH_WATER(max_frame);
5143 hw->fc.low_water = FC_LOW_WATER(max_frame);
5144 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
5145 hw->fc.send_xon = true;
5146 hw->fc.disable_fc_autoneg = false;
5147
5148 /* enable itr by default in dynamic mode */
5149 adapter->rx_itr_setting = 1;
5150 adapter->rx_eitr_param = 20000;
5151 adapter->tx_itr_setting = 1;
5152 adapter->tx_eitr_param = 10000;
5153
5154 /* set defaults for eitr in MegaBytes */
5155 adapter->eitr_low = 10;
5156 adapter->eitr_high = 20;
5157
5158 /* set default ring sizes */
5159 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
5160 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
5161
5162 /* initialize eeprom parameters */
5163 if (ixgbe_init_eeprom_params_generic(hw)) {
5164 e_dev_err("EEPROM initialization failed\n");
5165 return -EIO;
5166 }
5167
5168 /* enable rx csum by default */
5169 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
5170
5171 /* get assigned NUMA node */
5172 adapter->node = dev_to_node(&pdev->dev);
5173
5174 set_bit(__IXGBE_DOWN, &adapter->state);
5175
5176 return 0;
5177 }
5178
5179 /**
5180 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
5181 * @tx_ring: tx descriptor ring (for a specific queue) to setup
5182 *
5183 * Return 0 on success, negative on failure
5184 **/
5185 int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
5186 {
5187 struct device *dev = tx_ring->dev;
5188 int size;
5189
5190 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
5191 tx_ring->tx_buffer_info = vzalloc_node(size, tx_ring->numa_node);
5192 if (!tx_ring->tx_buffer_info)
5193 tx_ring->tx_buffer_info = vzalloc(size);
5194 if (!tx_ring->tx_buffer_info)
5195 goto err;
5196
5197 /* round up to nearest 4K */
5198 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
5199 tx_ring->size = ALIGN(tx_ring->size, 4096);
5200
5201 tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
5202 &tx_ring->dma, GFP_KERNEL);
5203 if (!tx_ring->desc)
5204 goto err;
5205
5206 tx_ring->next_to_use = 0;
5207 tx_ring->next_to_clean = 0;
5208 tx_ring->work_limit = tx_ring->count;
5209 return 0;
5210
5211 err:
5212 vfree(tx_ring->tx_buffer_info);
5213 tx_ring->tx_buffer_info = NULL;
5214 dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n");
5215 return -ENOMEM;
5216 }
5217
5218 /**
5219 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
5220 * @adapter: board private structure
5221 *
5222 * If this function returns with an error, then it's possible one or
5223 * more of the rings is populated (while the rest are not). It is the
5224 * callers duty to clean those orphaned rings.
5225 *
5226 * Return 0 on success, negative on failure
5227 **/
5228 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
5229 {
5230 int i, err = 0;
5231
5232 for (i = 0; i < adapter->num_tx_queues; i++) {
5233 err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
5234 if (!err)
5235 continue;
5236 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
5237 break;
5238 }
5239
5240 return err;
5241 }
5242
5243 /**
5244 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
5245 * @rx_ring: rx descriptor ring (for a specific queue) to setup
5246 *
5247 * Returns 0 on success, negative on failure
5248 **/
5249 int ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring)
5250 {
5251 struct device *dev = rx_ring->dev;
5252 int size;
5253
5254 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
5255 rx_ring->rx_buffer_info = vzalloc_node(size, rx_ring->numa_node);
5256 if (!rx_ring->rx_buffer_info)
5257 rx_ring->rx_buffer_info = vzalloc(size);
5258 if (!rx_ring->rx_buffer_info)
5259 goto err;
5260
5261 /* Round up to nearest 4K */
5262 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
5263 rx_ring->size = ALIGN(rx_ring->size, 4096);
5264
5265 rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
5266 &rx_ring->dma, GFP_KERNEL);
5267
5268 if (!rx_ring->desc)
5269 goto err;
5270
5271 rx_ring->next_to_clean = 0;
5272 rx_ring->next_to_use = 0;
5273
5274 return 0;
5275 err:
5276 vfree(rx_ring->rx_buffer_info);
5277 rx_ring->rx_buffer_info = NULL;
5278 dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");
5279 return -ENOMEM;
5280 }
5281
5282 /**
5283 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
5284 * @adapter: board private structure
5285 *
5286 * If this function returns with an error, then it's possible one or
5287 * more of the rings is populated (while the rest are not). It is the
5288 * callers duty to clean those orphaned rings.
5289 *
5290 * Return 0 on success, negative on failure
5291 **/
5292 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
5293 {
5294 int i, err = 0;
5295
5296 for (i = 0; i < adapter->num_rx_queues; i++) {
5297 err = ixgbe_setup_rx_resources(adapter->rx_ring[i]);
5298 if (!err)
5299 continue;
5300 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
5301 break;
5302 }
5303
5304 return err;
5305 }
5306
5307 /**
5308 * ixgbe_free_tx_resources - Free Tx Resources per Queue
5309 * @tx_ring: Tx descriptor ring for a specific queue
5310 *
5311 * Free all transmit software resources
5312 **/
5313 void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring)
5314 {
5315 ixgbe_clean_tx_ring(tx_ring);
5316
5317 vfree(tx_ring->tx_buffer_info);
5318 tx_ring->tx_buffer_info = NULL;
5319
5320 /* if not set, then don't free */
5321 if (!tx_ring->desc)
5322 return;
5323
5324 dma_free_coherent(tx_ring->dev, tx_ring->size,
5325 tx_ring->desc, tx_ring->dma);
5326
5327 tx_ring->desc = NULL;
5328 }
5329
5330 /**
5331 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
5332 * @adapter: board private structure
5333 *
5334 * Free all transmit software resources
5335 **/
5336 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
5337 {
5338 int i;
5339
5340 for (i = 0; i < adapter->num_tx_queues; i++)
5341 if (adapter->tx_ring[i]->desc)
5342 ixgbe_free_tx_resources(adapter->tx_ring[i]);
5343 }
5344
5345 /**
5346 * ixgbe_free_rx_resources - Free Rx Resources
5347 * @rx_ring: ring to clean the resources from
5348 *
5349 * Free all receive software resources
5350 **/
5351 void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring)
5352 {
5353 ixgbe_clean_rx_ring(rx_ring);
5354
5355 vfree(rx_ring->rx_buffer_info);
5356 rx_ring->rx_buffer_info = NULL;
5357
5358 /* if not set, then don't free */
5359 if (!rx_ring->desc)
5360 return;
5361
5362 dma_free_coherent(rx_ring->dev, rx_ring->size,
5363 rx_ring->desc, rx_ring->dma);
5364
5365 rx_ring->desc = NULL;
5366 }
5367
5368 /**
5369 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
5370 * @adapter: board private structure
5371 *
5372 * Free all receive software resources
5373 **/
5374 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
5375 {
5376 int i;
5377
5378 for (i = 0; i < adapter->num_rx_queues; i++)
5379 if (adapter->rx_ring[i]->desc)
5380 ixgbe_free_rx_resources(adapter->rx_ring[i]);
5381 }
5382
5383 /**
5384 * ixgbe_change_mtu - Change the Maximum Transfer Unit
5385 * @netdev: network interface device structure
5386 * @new_mtu: new value for maximum frame size
5387 *
5388 * Returns 0 on success, negative on failure
5389 **/
5390 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
5391 {
5392 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5393 struct ixgbe_hw *hw = &adapter->hw;
5394 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5395
5396 /* MTU < 68 is an error and causes problems on some kernels */
5397 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
5398 return -EINVAL;
5399
5400 e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5401 /* must set new MTU before calling down or up */
5402 netdev->mtu = new_mtu;
5403
5404 hw->fc.high_water = FC_HIGH_WATER(max_frame);
5405 hw->fc.low_water = FC_LOW_WATER(max_frame);
5406
5407 if (netif_running(netdev))
5408 ixgbe_reinit_locked(adapter);
5409
5410 return 0;
5411 }
5412
5413 /**
5414 * ixgbe_open - Called when a network interface is made active
5415 * @netdev: network interface device structure
5416 *
5417 * Returns 0 on success, negative value on failure
5418 *
5419 * The open entry point is called when a network interface is made
5420 * active by the system (IFF_UP). At this point all resources needed
5421 * for transmit and receive operations are allocated, the interrupt
5422 * handler is registered with the OS, the watchdog timer is started,
5423 * and the stack is notified that the interface is ready.
5424 **/
5425 static int ixgbe_open(struct net_device *netdev)
5426 {
5427 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5428 int err;
5429
5430 /* disallow open during test */
5431 if (test_bit(__IXGBE_TESTING, &adapter->state))
5432 return -EBUSY;
5433
5434 netif_carrier_off(netdev);
5435
5436 /* allocate transmit descriptors */
5437 err = ixgbe_setup_all_tx_resources(adapter);
5438 if (err)
5439 goto err_setup_tx;
5440
5441 /* allocate receive descriptors */
5442 err = ixgbe_setup_all_rx_resources(adapter);
5443 if (err)
5444 goto err_setup_rx;
5445
5446 ixgbe_configure(adapter);
5447
5448 err = ixgbe_request_irq(adapter);
5449 if (err)
5450 goto err_req_irq;
5451
5452 err = ixgbe_up_complete(adapter);
5453 if (err)
5454 goto err_up;
5455
5456 netif_tx_start_all_queues(netdev);
5457
5458 return 0;
5459
5460 err_up:
5461 ixgbe_release_hw_control(adapter);
5462 ixgbe_free_irq(adapter);
5463 err_req_irq:
5464 err_setup_rx:
5465 ixgbe_free_all_rx_resources(adapter);
5466 err_setup_tx:
5467 ixgbe_free_all_tx_resources(adapter);
5468 ixgbe_reset(adapter);
5469
5470 return err;
5471 }
5472
5473 /**
5474 * ixgbe_close - Disables a network interface
5475 * @netdev: network interface device structure
5476 *
5477 * Returns 0, this is not allowed to fail
5478 *
5479 * The close entry point is called when an interface is de-activated
5480 * by the OS. The hardware is still under the drivers control, but
5481 * needs to be disabled. A global MAC reset is issued to stop the
5482 * hardware, and all transmit and receive resources are freed.
5483 **/
5484 static int ixgbe_close(struct net_device *netdev)
5485 {
5486 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5487
5488 ixgbe_down(adapter);
5489 ixgbe_free_irq(adapter);
5490
5491 ixgbe_free_all_tx_resources(adapter);
5492 ixgbe_free_all_rx_resources(adapter);
5493
5494 ixgbe_release_hw_control(adapter);
5495
5496 return 0;
5497 }
5498
5499 #ifdef CONFIG_PM
5500 static int ixgbe_resume(struct pci_dev *pdev)
5501 {
5502 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5503 struct net_device *netdev = adapter->netdev;
5504 u32 err;
5505
5506 pci_set_power_state(pdev, PCI_D0);
5507 pci_restore_state(pdev);
5508 /*
5509 * pci_restore_state clears dev->state_saved so call
5510 * pci_save_state to restore it.
5511 */
5512 pci_save_state(pdev);
5513
5514 err = pci_enable_device_mem(pdev);
5515 if (err) {
5516 e_dev_err("Cannot enable PCI device from suspend\n");
5517 return err;
5518 }
5519 pci_set_master(pdev);
5520
5521 pci_wake_from_d3(pdev, false);
5522
5523 err = ixgbe_init_interrupt_scheme(adapter);
5524 if (err) {
5525 e_dev_err("Cannot initialize interrupts for device\n");
5526 return err;
5527 }
5528
5529 ixgbe_reset(adapter);
5530
5531 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5532
5533 if (netif_running(netdev)) {
5534 err = ixgbe_open(netdev);
5535 if (err)
5536 return err;
5537 }
5538
5539 netif_device_attach(netdev);
5540
5541 return 0;
5542 }
5543 #endif /* CONFIG_PM */
5544
5545 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
5546 {
5547 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5548 struct net_device *netdev = adapter->netdev;
5549 struct ixgbe_hw *hw = &adapter->hw;
5550 u32 ctrl, fctrl;
5551 u32 wufc = adapter->wol;
5552 #ifdef CONFIG_PM
5553 int retval = 0;
5554 #endif
5555
5556 netif_device_detach(netdev);
5557
5558 if (netif_running(netdev)) {
5559 ixgbe_down(adapter);
5560 ixgbe_free_irq(adapter);
5561 ixgbe_free_all_tx_resources(adapter);
5562 ixgbe_free_all_rx_resources(adapter);
5563 }
5564
5565 ixgbe_clear_interrupt_scheme(adapter);
5566
5567 #ifdef CONFIG_PM
5568 retval = pci_save_state(pdev);
5569 if (retval)
5570 return retval;
5571
5572 #endif
5573 if (wufc) {
5574 ixgbe_set_rx_mode(netdev);
5575
5576 /* turn on all-multi mode if wake on multicast is enabled */
5577 if (wufc & IXGBE_WUFC_MC) {
5578 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5579 fctrl |= IXGBE_FCTRL_MPE;
5580 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
5581 }
5582
5583 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
5584 ctrl |= IXGBE_CTRL_GIO_DIS;
5585 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
5586
5587 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
5588 } else {
5589 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
5590 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
5591 }
5592
5593 switch (hw->mac.type) {
5594 case ixgbe_mac_82598EB:
5595 pci_wake_from_d3(pdev, false);
5596 break;
5597 case ixgbe_mac_82599EB:
5598 case ixgbe_mac_X540:
5599 pci_wake_from_d3(pdev, !!wufc);
5600 break;
5601 default:
5602 break;
5603 }
5604
5605 *enable_wake = !!wufc;
5606
5607 ixgbe_release_hw_control(adapter);
5608
5609 pci_disable_device(pdev);
5610
5611 return 0;
5612 }
5613
5614 #ifdef CONFIG_PM
5615 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
5616 {
5617 int retval;
5618 bool wake;
5619
5620 retval = __ixgbe_shutdown(pdev, &wake);
5621 if (retval)
5622 return retval;
5623
5624 if (wake) {
5625 pci_prepare_to_sleep(pdev);
5626 } else {
5627 pci_wake_from_d3(pdev, false);
5628 pci_set_power_state(pdev, PCI_D3hot);
5629 }
5630
5631 return 0;
5632 }
5633 #endif /* CONFIG_PM */
5634
5635 static void ixgbe_shutdown(struct pci_dev *pdev)
5636 {
5637 bool wake;
5638
5639 __ixgbe_shutdown(pdev, &wake);
5640
5641 if (system_state == SYSTEM_POWER_OFF) {
5642 pci_wake_from_d3(pdev, wake);
5643 pci_set_power_state(pdev, PCI_D3hot);
5644 }
5645 }
5646
5647 /**
5648 * ixgbe_update_stats - Update the board statistics counters.
5649 * @adapter: board private structure
5650 **/
5651 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
5652 {
5653 struct net_device *netdev = adapter->netdev;
5654 struct ixgbe_hw *hw = &adapter->hw;
5655 struct ixgbe_hw_stats *hwstats = &adapter->stats;
5656 u64 total_mpc = 0;
5657 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
5658 u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
5659 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
5660 u64 bytes = 0, packets = 0;
5661
5662 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5663 test_bit(__IXGBE_RESETTING, &adapter->state))
5664 return;
5665
5666 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
5667 u64 rsc_count = 0;
5668 u64 rsc_flush = 0;
5669 for (i = 0; i < 16; i++)
5670 adapter->hw_rx_no_dma_resources +=
5671 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5672 for (i = 0; i < adapter->num_rx_queues; i++) {
5673 rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
5674 rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
5675 }
5676 adapter->rsc_total_count = rsc_count;
5677 adapter->rsc_total_flush = rsc_flush;
5678 }
5679
5680 for (i = 0; i < adapter->num_rx_queues; i++) {
5681 struct ixgbe_ring *rx_ring = adapter->rx_ring[i];
5682 non_eop_descs += rx_ring->rx_stats.non_eop_descs;
5683 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
5684 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
5685 bytes += rx_ring->stats.bytes;
5686 packets += rx_ring->stats.packets;
5687 }
5688 adapter->non_eop_descs = non_eop_descs;
5689 adapter->alloc_rx_page_failed = alloc_rx_page_failed;
5690 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
5691 netdev->stats.rx_bytes = bytes;
5692 netdev->stats.rx_packets = packets;
5693
5694 bytes = 0;
5695 packets = 0;
5696 /* gather some stats to the adapter struct that are per queue */
5697 for (i = 0; i < adapter->num_tx_queues; i++) {
5698 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
5699 restart_queue += tx_ring->tx_stats.restart_queue;
5700 tx_busy += tx_ring->tx_stats.tx_busy;
5701 bytes += tx_ring->stats.bytes;
5702 packets += tx_ring->stats.packets;
5703 }
5704 adapter->restart_queue = restart_queue;
5705 adapter->tx_busy = tx_busy;
5706 netdev->stats.tx_bytes = bytes;
5707 netdev->stats.tx_packets = packets;
5708
5709 hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
5710 for (i = 0; i < 8; i++) {
5711 /* for packet buffers not used, the register should read 0 */
5712 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
5713 missed_rx += mpc;
5714 hwstats->mpc[i] += mpc;
5715 total_mpc += hwstats->mpc[i];
5716 if (hw->mac.type == ixgbe_mac_82598EB)
5717 hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
5718 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
5719 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
5720 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
5721 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
5722 switch (hw->mac.type) {
5723 case ixgbe_mac_82598EB:
5724 hwstats->pxonrxc[i] +=
5725 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
5726 break;
5727 case ixgbe_mac_82599EB:
5728 case ixgbe_mac_X540:
5729 hwstats->pxonrxc[i] +=
5730 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
5731 break;
5732 default:
5733 break;
5734 }
5735 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
5736 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
5737 }
5738 hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
5739 /* work around hardware counting issue */
5740 hwstats->gprc -= missed_rx;
5741
5742 ixgbe_update_xoff_received(adapter);
5743
5744 /* 82598 hardware only has a 32 bit counter in the high register */
5745 switch (hw->mac.type) {
5746 case ixgbe_mac_82598EB:
5747 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
5748 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
5749 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
5750 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
5751 break;
5752 case ixgbe_mac_82599EB:
5753 case ixgbe_mac_X540:
5754 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
5755 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
5756 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
5757 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
5758 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
5759 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
5760 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
5761 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
5762 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
5763 #ifdef IXGBE_FCOE
5764 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
5765 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
5766 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
5767 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
5768 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
5769 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
5770 #endif /* IXGBE_FCOE */
5771 break;
5772 default:
5773 break;
5774 }
5775 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
5776 hwstats->bprc += bprc;
5777 hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
5778 if (hw->mac.type == ixgbe_mac_82598EB)
5779 hwstats->mprc -= bprc;
5780 hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
5781 hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
5782 hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
5783 hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
5784 hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
5785 hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
5786 hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
5787 hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
5788 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
5789 hwstats->lxontxc += lxon;
5790 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
5791 hwstats->lxofftxc += lxoff;
5792 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5793 hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
5794 hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
5795 /*
5796 * 82598 errata - tx of flow control packets is included in tx counters
5797 */
5798 xon_off_tot = lxon + lxoff;
5799 hwstats->gptc -= xon_off_tot;
5800 hwstats->mptc -= xon_off_tot;
5801 hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
5802 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5803 hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
5804 hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
5805 hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
5806 hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
5807 hwstats->ptc64 -= xon_off_tot;
5808 hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
5809 hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
5810 hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
5811 hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
5812 hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
5813 hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
5814
5815 /* Fill out the OS statistics structure */
5816 netdev->stats.multicast = hwstats->mprc;
5817
5818 /* Rx Errors */
5819 netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
5820 netdev->stats.rx_dropped = 0;
5821 netdev->stats.rx_length_errors = hwstats->rlec;
5822 netdev->stats.rx_crc_errors = hwstats->crcerrs;
5823 netdev->stats.rx_missed_errors = total_mpc;
5824 }
5825
5826 /**
5827 * ixgbe_watchdog - Timer Call-back
5828 * @data: pointer to adapter cast into an unsigned long
5829 **/
5830 static void ixgbe_watchdog(unsigned long data)
5831 {
5832 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
5833 struct ixgbe_hw *hw = &adapter->hw;
5834 u64 eics = 0;
5835 int i;
5836
5837 /*
5838 * Do the watchdog outside of interrupt context due to the lovely
5839 * delays that some of the newer hardware requires
5840 */
5841
5842 if (test_bit(__IXGBE_DOWN, &adapter->state))
5843 goto watchdog_short_circuit;
5844
5845 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
5846 /*
5847 * for legacy and MSI interrupts don't set any bits
5848 * that are enabled for EIAM, because this operation
5849 * would set *both* EIMS and EICS for any bit in EIAM
5850 */
5851 IXGBE_WRITE_REG(hw, IXGBE_EICS,
5852 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
5853 goto watchdog_reschedule;
5854 }
5855
5856 /* get one bit for every active tx/rx interrupt vector */
5857 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
5858 struct ixgbe_q_vector *qv = adapter->q_vector[i];
5859 if (qv->rxr_count || qv->txr_count)
5860 eics |= ((u64)1 << i);
5861 }
5862
5863 /* Cause software interrupt to ensure rx rings are cleaned */
5864 ixgbe_irq_rearm_queues(adapter, eics);
5865
5866 watchdog_reschedule:
5867 /* Reset the timer */
5868 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
5869
5870 watchdog_short_circuit:
5871 schedule_work(&adapter->watchdog_task);
5872 }
5873
5874 /**
5875 * ixgbe_multispeed_fiber_task - worker thread to configure multispeed fiber
5876 * @work: pointer to work_struct containing our data
5877 **/
5878 static void ixgbe_multispeed_fiber_task(struct work_struct *work)
5879 {
5880 struct ixgbe_adapter *adapter = container_of(work,
5881 struct ixgbe_adapter,
5882 multispeed_fiber_task);
5883 struct ixgbe_hw *hw = &adapter->hw;
5884 u32 autoneg;
5885 bool negotiation;
5886
5887 adapter->flags |= IXGBE_FLAG_IN_SFP_LINK_TASK;
5888 autoneg = hw->phy.autoneg_advertised;
5889 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
5890 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
5891 hw->mac.autotry_restart = false;
5892 if (hw->mac.ops.setup_link)
5893 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
5894 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
5895 adapter->flags &= ~IXGBE_FLAG_IN_SFP_LINK_TASK;
5896 }
5897
5898 /**
5899 * ixgbe_sfp_config_module_task - worker thread to configure a new SFP+ module
5900 * @work: pointer to work_struct containing our data
5901 **/
5902 static void ixgbe_sfp_config_module_task(struct work_struct *work)
5903 {
5904 struct ixgbe_adapter *adapter = container_of(work,
5905 struct ixgbe_adapter,
5906 sfp_config_module_task);
5907 struct ixgbe_hw *hw = &adapter->hw;
5908 u32 err;
5909
5910 adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
5911
5912 /* Time for electrical oscillations to settle down */
5913 msleep(100);
5914 err = hw->phy.ops.identify_sfp(hw);
5915
5916 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5917 e_dev_err("failed to initialize because an unsupported SFP+ "
5918 "module type was detected.\n");
5919 e_dev_err("Reload the driver after installing a supported "
5920 "module.\n");
5921 unregister_netdev(adapter->netdev);
5922 return;
5923 }
5924 hw->mac.ops.setup_sfp(hw);
5925
5926 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
5927 /* This will also work for DA Twinax connections */
5928 schedule_work(&adapter->multispeed_fiber_task);
5929 adapter->flags &= ~IXGBE_FLAG_IN_SFP_MOD_TASK;
5930 }
5931
5932 /**
5933 * ixgbe_fdir_reinit_task - worker thread to reinit FDIR filter table
5934 * @work: pointer to work_struct containing our data
5935 **/
5936 static void ixgbe_fdir_reinit_task(struct work_struct *work)
5937 {
5938 struct ixgbe_adapter *adapter = container_of(work,
5939 struct ixgbe_adapter,
5940 fdir_reinit_task);
5941 struct ixgbe_hw *hw = &adapter->hw;
5942 int i;
5943
5944 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
5945 for (i = 0; i < adapter->num_tx_queues; i++)
5946 set_bit(__IXGBE_TX_FDIR_INIT_DONE,
5947 &(adapter->tx_ring[i]->state));
5948 } else {
5949 e_err(probe, "failed to finish FDIR re-initialization, "
5950 "ignored adding FDIR ATR filters\n");
5951 }
5952 /* Done FDIR Re-initialization, enable transmits */
5953 netif_tx_start_all_queues(adapter->netdev);
5954 }
5955
5956 static DEFINE_MUTEX(ixgbe_watchdog_lock);
5957
5958 /**
5959 * ixgbe_watchdog_task - worker thread to bring link up
5960 * @work: pointer to work_struct containing our data
5961 **/
5962 static void ixgbe_watchdog_task(struct work_struct *work)
5963 {
5964 struct ixgbe_adapter *adapter = container_of(work,
5965 struct ixgbe_adapter,
5966 watchdog_task);
5967 struct net_device *netdev = adapter->netdev;
5968 struct ixgbe_hw *hw = &adapter->hw;
5969 u32 link_speed;
5970 bool link_up;
5971 int i;
5972 struct ixgbe_ring *tx_ring;
5973 int some_tx_pending = 0;
5974
5975 mutex_lock(&ixgbe_watchdog_lock);
5976
5977 link_up = adapter->link_up;
5978 link_speed = adapter->link_speed;
5979
5980 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
5981 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
5982 if (link_up) {
5983 #ifdef CONFIG_DCB
5984 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5985 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
5986 hw->mac.ops.fc_enable(hw, i);
5987 } else {
5988 hw->mac.ops.fc_enable(hw, 0);
5989 }
5990 #else
5991 hw->mac.ops.fc_enable(hw, 0);
5992 #endif
5993 }
5994
5995 if (link_up ||
5996 time_after(jiffies, (adapter->link_check_timeout +
5997 IXGBE_TRY_LINK_TIMEOUT))) {
5998 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5999 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
6000 }
6001 adapter->link_up = link_up;
6002 adapter->link_speed = link_speed;
6003 }
6004
6005 if (link_up) {
6006 if (!netif_carrier_ok(netdev)) {
6007 bool flow_rx, flow_tx;
6008
6009 switch (hw->mac.type) {
6010 case ixgbe_mac_82598EB: {
6011 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
6012 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
6013 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
6014 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
6015 }
6016 break;
6017 case ixgbe_mac_82599EB:
6018 case ixgbe_mac_X540: {
6019 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
6020 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
6021 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
6022 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
6023 }
6024 break;
6025 default:
6026 flow_tx = false;
6027 flow_rx = false;
6028 break;
6029 }
6030
6031 e_info(drv, "NIC Link is Up %s, Flow Control: %s\n",
6032 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
6033 "10 Gbps" :
6034 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
6035 "1 Gbps" : "unknown speed")),
6036 ((flow_rx && flow_tx) ? "RX/TX" :
6037 (flow_rx ? "RX" :
6038 (flow_tx ? "TX" : "None"))));
6039
6040 netif_carrier_on(netdev);
6041 } else {
6042 /* Force detection of hung controller */
6043 for (i = 0; i < adapter->num_tx_queues; i++) {
6044 tx_ring = adapter->tx_ring[i];
6045 set_check_for_tx_hang(tx_ring);
6046 }
6047 }
6048 } else {
6049 adapter->link_up = false;
6050 adapter->link_speed = 0;
6051 if (netif_carrier_ok(netdev)) {
6052 e_info(drv, "NIC Link is Down\n");
6053 netif_carrier_off(netdev);
6054 }
6055 }
6056
6057 if (!netif_carrier_ok(netdev)) {
6058 for (i = 0; i < adapter->num_tx_queues; i++) {
6059 tx_ring = adapter->tx_ring[i];
6060 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
6061 some_tx_pending = 1;
6062 break;
6063 }
6064 }
6065
6066 if (some_tx_pending) {
6067 /* We've lost link, so the controller stops DMA,
6068 * but we've got queued Tx work that's never going
6069 * to get done, so reset controller to flush Tx.
6070 * (Do the reset outside of interrupt context).
6071 */
6072 schedule_work(&adapter->reset_task);
6073 }
6074 }
6075
6076 ixgbe_update_stats(adapter);
6077 mutex_unlock(&ixgbe_watchdog_lock);
6078 }
6079
6080 static int ixgbe_tso(struct ixgbe_adapter *adapter,
6081 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
6082 u32 tx_flags, u8 *hdr_len, __be16 protocol)
6083 {
6084 struct ixgbe_adv_tx_context_desc *context_desc;
6085 unsigned int i;
6086 int err;
6087 struct ixgbe_tx_buffer *tx_buffer_info;
6088 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
6089 u32 mss_l4len_idx, l4len;
6090
6091 if (skb_is_gso(skb)) {
6092 if (skb_header_cloned(skb)) {
6093 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
6094 if (err)
6095 return err;
6096 }
6097 l4len = tcp_hdrlen(skb);
6098 *hdr_len += l4len;
6099
6100 if (protocol == htons(ETH_P_IP)) {
6101 struct iphdr *iph = ip_hdr(skb);
6102 iph->tot_len = 0;
6103 iph->check = 0;
6104 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
6105 iph->daddr, 0,
6106 IPPROTO_TCP,
6107 0);
6108 } else if (skb_is_gso_v6(skb)) {
6109 ipv6_hdr(skb)->payload_len = 0;
6110 tcp_hdr(skb)->check =
6111 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
6112 &ipv6_hdr(skb)->daddr,
6113 0, IPPROTO_TCP, 0);
6114 }
6115
6116 i = tx_ring->next_to_use;
6117
6118 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6119 context_desc = IXGBE_TX_CTXTDESC_ADV(tx_ring, i);
6120
6121 /* VLAN MACLEN IPLEN */
6122 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
6123 vlan_macip_lens |=
6124 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
6125 vlan_macip_lens |= ((skb_network_offset(skb)) <<
6126 IXGBE_ADVTXD_MACLEN_SHIFT);
6127 *hdr_len += skb_network_offset(skb);
6128 vlan_macip_lens |=
6129 (skb_transport_header(skb) - skb_network_header(skb));
6130 *hdr_len +=
6131 (skb_transport_header(skb) - skb_network_header(skb));
6132 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
6133 context_desc->seqnum_seed = 0;
6134
6135 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
6136 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
6137 IXGBE_ADVTXD_DTYP_CTXT);
6138
6139 if (protocol == htons(ETH_P_IP))
6140 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
6141 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
6142 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
6143
6144 /* MSS L4LEN IDX */
6145 mss_l4len_idx =
6146 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
6147 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
6148 /* use index 1 for TSO */
6149 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6150 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
6151
6152 tx_buffer_info->time_stamp = jiffies;
6153 tx_buffer_info->next_to_watch = i;
6154
6155 i++;
6156 if (i == tx_ring->count)
6157 i = 0;
6158 tx_ring->next_to_use = i;
6159
6160 return true;
6161 }
6162 return false;
6163 }
6164
6165 static u32 ixgbe_psum(struct ixgbe_adapter *adapter, struct sk_buff *skb,
6166 __be16 protocol)
6167 {
6168 u32 rtn = 0;
6169
6170 switch (protocol) {
6171 case cpu_to_be16(ETH_P_IP):
6172 rtn |= IXGBE_ADVTXD_TUCMD_IPV4;
6173 switch (ip_hdr(skb)->protocol) {
6174 case IPPROTO_TCP:
6175 rtn |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
6176 break;
6177 case IPPROTO_SCTP:
6178 rtn |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
6179 break;
6180 }
6181 break;
6182 case cpu_to_be16(ETH_P_IPV6):
6183 /* XXX what about other V6 headers?? */
6184 switch (ipv6_hdr(skb)->nexthdr) {
6185 case IPPROTO_TCP:
6186 rtn |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
6187 break;
6188 case IPPROTO_SCTP:
6189 rtn |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
6190 break;
6191 }
6192 break;
6193 default:
6194 if (unlikely(net_ratelimit()))
6195 e_warn(probe, "partial checksum but proto=%x!\n",
6196 protocol);
6197 break;
6198 }
6199
6200 return rtn;
6201 }
6202
6203 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
6204 struct ixgbe_ring *tx_ring,
6205 struct sk_buff *skb, u32 tx_flags,
6206 __be16 protocol)
6207 {
6208 struct ixgbe_adv_tx_context_desc *context_desc;
6209 unsigned int i;
6210 struct ixgbe_tx_buffer *tx_buffer_info;
6211 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
6212
6213 if (skb->ip_summed == CHECKSUM_PARTIAL ||
6214 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
6215 i = tx_ring->next_to_use;
6216 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6217 context_desc = IXGBE_TX_CTXTDESC_ADV(tx_ring, i);
6218
6219 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
6220 vlan_macip_lens |=
6221 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
6222 vlan_macip_lens |= (skb_network_offset(skb) <<
6223 IXGBE_ADVTXD_MACLEN_SHIFT);
6224 if (skb->ip_summed == CHECKSUM_PARTIAL)
6225 vlan_macip_lens |= (skb_transport_header(skb) -
6226 skb_network_header(skb));
6227
6228 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
6229 context_desc->seqnum_seed = 0;
6230
6231 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
6232 IXGBE_ADVTXD_DTYP_CTXT);
6233
6234 if (skb->ip_summed == CHECKSUM_PARTIAL)
6235 type_tucmd_mlhl |= ixgbe_psum(adapter, skb, protocol);
6236
6237 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
6238 /* use index zero for tx checksum offload */
6239 context_desc->mss_l4len_idx = 0;
6240
6241 tx_buffer_info->time_stamp = jiffies;
6242 tx_buffer_info->next_to_watch = i;
6243
6244 i++;
6245 if (i == tx_ring->count)
6246 i = 0;
6247 tx_ring->next_to_use = i;
6248
6249 return true;
6250 }
6251
6252 return false;
6253 }
6254
6255 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
6256 struct ixgbe_ring *tx_ring,
6257 struct sk_buff *skb, u32 tx_flags,
6258 unsigned int first, const u8 hdr_len)
6259 {
6260 struct device *dev = tx_ring->dev;
6261 struct ixgbe_tx_buffer *tx_buffer_info;
6262 unsigned int len;
6263 unsigned int total = skb->len;
6264 unsigned int offset = 0, size, count = 0, i;
6265 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
6266 unsigned int f;
6267 unsigned int bytecount = skb->len;
6268 u16 gso_segs = 1;
6269
6270 i = tx_ring->next_to_use;
6271
6272 if (tx_flags & IXGBE_TX_FLAGS_FCOE)
6273 /* excluding fcoe_crc_eof for FCoE */
6274 total -= sizeof(struct fcoe_crc_eof);
6275
6276 len = min(skb_headlen(skb), total);
6277 while (len) {
6278 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6279 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
6280
6281 tx_buffer_info->length = size;
6282 tx_buffer_info->mapped_as_page = false;
6283 tx_buffer_info->dma = dma_map_single(dev,
6284 skb->data + offset,
6285 size, DMA_TO_DEVICE);
6286 if (dma_mapping_error(dev, tx_buffer_info->dma))
6287 goto dma_error;
6288 tx_buffer_info->time_stamp = jiffies;
6289 tx_buffer_info->next_to_watch = i;
6290
6291 len -= size;
6292 total -= size;
6293 offset += size;
6294 count++;
6295
6296 if (len) {
6297 i++;
6298 if (i == tx_ring->count)
6299 i = 0;
6300 }
6301 }
6302
6303 for (f = 0; f < nr_frags; f++) {
6304 struct skb_frag_struct *frag;
6305
6306 frag = &skb_shinfo(skb)->frags[f];
6307 len = min((unsigned int)frag->size, total);
6308 offset = frag->page_offset;
6309
6310 while (len) {
6311 i++;
6312 if (i == tx_ring->count)
6313 i = 0;
6314
6315 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6316 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
6317
6318 tx_buffer_info->length = size;
6319 tx_buffer_info->dma = dma_map_page(dev,
6320 frag->page,
6321 offset, size,
6322 DMA_TO_DEVICE);
6323 tx_buffer_info->mapped_as_page = true;
6324 if (dma_mapping_error(dev, tx_buffer_info->dma))
6325 goto dma_error;
6326 tx_buffer_info->time_stamp = jiffies;
6327 tx_buffer_info->next_to_watch = i;
6328
6329 len -= size;
6330 total -= size;
6331 offset += size;
6332 count++;
6333 }
6334 if (total == 0)
6335 break;
6336 }
6337
6338 if (tx_flags & IXGBE_TX_FLAGS_TSO)
6339 gso_segs = skb_shinfo(skb)->gso_segs;
6340 #ifdef IXGBE_FCOE
6341 /* adjust for FCoE Sequence Offload */
6342 else if (tx_flags & IXGBE_TX_FLAGS_FSO)
6343 gso_segs = DIV_ROUND_UP(skb->len - hdr_len,
6344 skb_shinfo(skb)->gso_size);
6345 #endif /* IXGBE_FCOE */
6346 bytecount += (gso_segs - 1) * hdr_len;
6347
6348 /* multiply data chunks by size of headers */
6349 tx_ring->tx_buffer_info[i].bytecount = bytecount;
6350 tx_ring->tx_buffer_info[i].gso_segs = gso_segs;
6351 tx_ring->tx_buffer_info[i].skb = skb;
6352 tx_ring->tx_buffer_info[first].next_to_watch = i;
6353
6354 return count;
6355
6356 dma_error:
6357 e_dev_err("TX DMA map failed\n");
6358
6359 /* clear timestamp and dma mappings for failed tx_buffer_info map */
6360 tx_buffer_info->dma = 0;
6361 tx_buffer_info->time_stamp = 0;
6362 tx_buffer_info->next_to_watch = 0;
6363 if (count)
6364 count--;
6365
6366 /* clear timestamp and dma mappings for remaining portion of packet */
6367 while (count--) {
6368 if (i == 0)
6369 i += tx_ring->count;
6370 i--;
6371 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6372 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
6373 }
6374
6375 return 0;
6376 }
6377
6378 static void ixgbe_tx_queue(struct ixgbe_ring *tx_ring,
6379 int tx_flags, int count, u32 paylen, u8 hdr_len)
6380 {
6381 union ixgbe_adv_tx_desc *tx_desc = NULL;
6382 struct ixgbe_tx_buffer *tx_buffer_info;
6383 u32 olinfo_status = 0, cmd_type_len = 0;
6384 unsigned int i;
6385 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
6386
6387 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
6388
6389 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
6390
6391 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
6392 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
6393
6394 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
6395 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6396
6397 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6398 IXGBE_ADVTXD_POPTS_SHIFT;
6399
6400 /* use index 1 context for tso */
6401 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6402 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
6403 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
6404 IXGBE_ADVTXD_POPTS_SHIFT;
6405
6406 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
6407 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6408 IXGBE_ADVTXD_POPTS_SHIFT;
6409
6410 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6411 olinfo_status |= IXGBE_ADVTXD_CC;
6412 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6413 if (tx_flags & IXGBE_TX_FLAGS_FSO)
6414 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6415 }
6416
6417 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
6418
6419 i = tx_ring->next_to_use;
6420 while (count--) {
6421 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6422 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
6423 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
6424 tx_desc->read.cmd_type_len =
6425 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
6426 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
6427 i++;
6428 if (i == tx_ring->count)
6429 i = 0;
6430 }
6431
6432 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
6433
6434 /*
6435 * Force memory writes to complete before letting h/w
6436 * know there are new descriptors to fetch. (Only
6437 * applicable for weak-ordered memory model archs,
6438 * such as IA-64).
6439 */
6440 wmb();
6441
6442 tx_ring->next_to_use = i;
6443 writel(i, tx_ring->tail);
6444 }
6445
6446 static void ixgbe_atr(struct ixgbe_adapter *adapter, struct sk_buff *skb,
6447 u8 queue, u32 tx_flags, __be16 protocol)
6448 {
6449 struct ixgbe_atr_input atr_input;
6450 struct iphdr *iph = ip_hdr(skb);
6451 struct ethhdr *eth = (struct ethhdr *)skb->data;
6452 struct tcphdr *th;
6453 u16 vlan_id;
6454
6455 /* Right now, we support IPv4 w/ TCP only */
6456 if (protocol != htons(ETH_P_IP) ||
6457 iph->protocol != IPPROTO_TCP)
6458 return;
6459
6460 memset(&atr_input, 0, sizeof(struct ixgbe_atr_input));
6461
6462 vlan_id = (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK) >>
6463 IXGBE_TX_FLAGS_VLAN_SHIFT;
6464
6465 th = tcp_hdr(skb);
6466
6467 ixgbe_atr_set_vlan_id_82599(&atr_input, vlan_id);
6468 ixgbe_atr_set_src_port_82599(&atr_input, th->dest);
6469 ixgbe_atr_set_dst_port_82599(&atr_input, th->source);
6470 ixgbe_atr_set_flex_byte_82599(&atr_input, eth->h_proto);
6471 ixgbe_atr_set_l4type_82599(&atr_input, IXGBE_ATR_L4TYPE_TCP);
6472 /* src and dst are inverted, think how the receiver sees them */
6473 ixgbe_atr_set_src_ipv4_82599(&atr_input, iph->daddr);
6474 ixgbe_atr_set_dst_ipv4_82599(&atr_input, iph->saddr);
6475
6476 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
6477 ixgbe_fdir_add_signature_filter_82599(&adapter->hw, &atr_input, queue);
6478 }
6479
6480 static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, int size)
6481 {
6482 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
6483 /* Herbert's original patch had:
6484 * smp_mb__after_netif_stop_queue();
6485 * but since that doesn't exist yet, just open code it. */
6486 smp_mb();
6487
6488 /* We need to check again in a case another CPU has just
6489 * made room available. */
6490 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
6491 return -EBUSY;
6492
6493 /* A reprieve! - use start_queue because it doesn't call schedule */
6494 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
6495 ++tx_ring->tx_stats.restart_queue;
6496 return 0;
6497 }
6498
6499 static int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, int size)
6500 {
6501 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
6502 return 0;
6503 return __ixgbe_maybe_stop_tx(tx_ring, size);
6504 }
6505
6506 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
6507 {
6508 struct ixgbe_adapter *adapter = netdev_priv(dev);
6509 int txq = smp_processor_id();
6510 #ifdef IXGBE_FCOE
6511 __be16 protocol;
6512
6513 protocol = vlan_get_protocol(skb);
6514
6515 if ((protocol == htons(ETH_P_FCOE)) ||
6516 (protocol == htons(ETH_P_FIP))) {
6517 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
6518 txq &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
6519 txq += adapter->ring_feature[RING_F_FCOE].mask;
6520 return txq;
6521 #ifdef CONFIG_IXGBE_DCB
6522 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6523 txq = adapter->fcoe.up;
6524 return txq;
6525 #endif
6526 }
6527 }
6528 #endif
6529
6530 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
6531 while (unlikely(txq >= dev->real_num_tx_queues))
6532 txq -= dev->real_num_tx_queues;
6533 return txq;
6534 }
6535
6536 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6537 if (skb->priority == TC_PRIO_CONTROL)
6538 txq = adapter->ring_feature[RING_F_DCB].indices-1;
6539 else
6540 txq = (skb->vlan_tci & IXGBE_TX_FLAGS_VLAN_PRIO_MASK)
6541 >> 13;
6542 return txq;
6543 }
6544
6545 return skb_tx_hash(dev, skb);
6546 }
6547
6548 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
6549 struct ixgbe_adapter *adapter,
6550 struct ixgbe_ring *tx_ring)
6551 {
6552 struct net_device *netdev = tx_ring->netdev;
6553 struct netdev_queue *txq;
6554 unsigned int first;
6555 unsigned int tx_flags = 0;
6556 u8 hdr_len = 0;
6557 int tso;
6558 int count = 0;
6559 unsigned int f;
6560 __be16 protocol;
6561
6562 protocol = vlan_get_protocol(skb);
6563
6564 if (vlan_tx_tag_present(skb)) {
6565 tx_flags |= vlan_tx_tag_get(skb);
6566 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6567 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
6568 tx_flags |= ((skb->queue_mapping & 0x7) << 13);
6569 }
6570 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6571 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6572 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED &&
6573 skb->priority != TC_PRIO_CONTROL) {
6574 tx_flags |= ((skb->queue_mapping & 0x7) << 13);
6575 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6576 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6577 }
6578
6579 #ifdef IXGBE_FCOE
6580 /* for FCoE with DCB, we force the priority to what
6581 * was specified by the switch */
6582 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED &&
6583 (protocol == htons(ETH_P_FCOE) ||
6584 protocol == htons(ETH_P_FIP))) {
6585 #ifdef CONFIG_IXGBE_DCB
6586 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6587 tx_flags &= ~(IXGBE_TX_FLAGS_VLAN_PRIO_MASK
6588 << IXGBE_TX_FLAGS_VLAN_SHIFT);
6589 tx_flags |= ((adapter->fcoe.up << 13)
6590 << IXGBE_TX_FLAGS_VLAN_SHIFT);
6591 }
6592 #endif
6593 /* flag for FCoE offloads */
6594 if (protocol == htons(ETH_P_FCOE))
6595 tx_flags |= IXGBE_TX_FLAGS_FCOE;
6596 }
6597 #endif
6598
6599 /* four things can cause us to need a context descriptor */
6600 if (skb_is_gso(skb) ||
6601 (skb->ip_summed == CHECKSUM_PARTIAL) ||
6602 (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
6603 (tx_flags & IXGBE_TX_FLAGS_FCOE))
6604 count++;
6605
6606 count += TXD_USE_COUNT(skb_headlen(skb));
6607 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
6608 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
6609
6610 if (ixgbe_maybe_stop_tx(tx_ring, count)) {
6611 tx_ring->tx_stats.tx_busy++;
6612 return NETDEV_TX_BUSY;
6613 }
6614
6615 first = tx_ring->next_to_use;
6616 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6617 #ifdef IXGBE_FCOE
6618 /* setup tx offload for FCoE */
6619 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
6620 if (tso < 0) {
6621 dev_kfree_skb_any(skb);
6622 return NETDEV_TX_OK;
6623 }
6624 if (tso)
6625 tx_flags |= IXGBE_TX_FLAGS_FSO;
6626 #endif /* IXGBE_FCOE */
6627 } else {
6628 if (protocol == htons(ETH_P_IP))
6629 tx_flags |= IXGBE_TX_FLAGS_IPV4;
6630 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len,
6631 protocol);
6632 if (tso < 0) {
6633 dev_kfree_skb_any(skb);
6634 return NETDEV_TX_OK;
6635 }
6636
6637 if (tso)
6638 tx_flags |= IXGBE_TX_FLAGS_TSO;
6639 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags,
6640 protocol) &&
6641 (skb->ip_summed == CHECKSUM_PARTIAL))
6642 tx_flags |= IXGBE_TX_FLAGS_CSUM;
6643 }
6644
6645 count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first, hdr_len);
6646 if (count) {
6647 /* add the ATR filter if ATR is on */
6648 if (tx_ring->atr_sample_rate) {
6649 ++tx_ring->atr_count;
6650 if ((tx_ring->atr_count >= tx_ring->atr_sample_rate) &&
6651 test_bit(__IXGBE_TX_FDIR_INIT_DONE,
6652 &tx_ring->state)) {
6653 ixgbe_atr(adapter, skb, tx_ring->queue_index,
6654 tx_flags, protocol);
6655 tx_ring->atr_count = 0;
6656 }
6657 }
6658 txq = netdev_get_tx_queue(netdev, tx_ring->queue_index);
6659 txq->tx_bytes += skb->len;
6660 txq->tx_packets++;
6661 ixgbe_tx_queue(tx_ring, tx_flags, count, skb->len, hdr_len);
6662 ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);
6663
6664 } else {
6665 dev_kfree_skb_any(skb);
6666 tx_ring->tx_buffer_info[first].time_stamp = 0;
6667 tx_ring->next_to_use = first;
6668 }
6669
6670 return NETDEV_TX_OK;
6671 }
6672
6673 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
6674 {
6675 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6676 struct ixgbe_ring *tx_ring;
6677
6678 tx_ring = adapter->tx_ring[skb->queue_mapping];
6679 return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
6680 }
6681
6682 /**
6683 * ixgbe_set_mac - Change the Ethernet Address of the NIC
6684 * @netdev: network interface device structure
6685 * @p: pointer to an address structure
6686 *
6687 * Returns 0 on success, negative on failure
6688 **/
6689 static int ixgbe_set_mac(struct net_device *netdev, void *p)
6690 {
6691 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6692 struct ixgbe_hw *hw = &adapter->hw;
6693 struct sockaddr *addr = p;
6694
6695 if (!is_valid_ether_addr(addr->sa_data))
6696 return -EADDRNOTAVAIL;
6697
6698 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
6699 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
6700
6701 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
6702 IXGBE_RAH_AV);
6703
6704 return 0;
6705 }
6706
6707 static int
6708 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
6709 {
6710 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6711 struct ixgbe_hw *hw = &adapter->hw;
6712 u16 value;
6713 int rc;
6714
6715 if (prtad != hw->phy.mdio.prtad)
6716 return -EINVAL;
6717 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
6718 if (!rc)
6719 rc = value;
6720 return rc;
6721 }
6722
6723 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
6724 u16 addr, u16 value)
6725 {
6726 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6727 struct ixgbe_hw *hw = &adapter->hw;
6728
6729 if (prtad != hw->phy.mdio.prtad)
6730 return -EINVAL;
6731 return hw->phy.ops.write_reg(hw, addr, devad, value);
6732 }
6733
6734 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
6735 {
6736 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6737
6738 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
6739 }
6740
6741 /**
6742 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
6743 * netdev->dev_addrs
6744 * @netdev: network interface device structure
6745 *
6746 * Returns non-zero on failure
6747 **/
6748 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
6749 {
6750 int err = 0;
6751 struct ixgbe_adapter *adapter = netdev_priv(dev);
6752 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6753
6754 if (is_valid_ether_addr(mac->san_addr)) {
6755 rtnl_lock();
6756 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6757 rtnl_unlock();
6758 }
6759 return err;
6760 }
6761
6762 /**
6763 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
6764 * netdev->dev_addrs
6765 * @netdev: network interface device structure
6766 *
6767 * Returns non-zero on failure
6768 **/
6769 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
6770 {
6771 int err = 0;
6772 struct ixgbe_adapter *adapter = netdev_priv(dev);
6773 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6774
6775 if (is_valid_ether_addr(mac->san_addr)) {
6776 rtnl_lock();
6777 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6778 rtnl_unlock();
6779 }
6780 return err;
6781 }
6782
6783 #ifdef CONFIG_NET_POLL_CONTROLLER
6784 /*
6785 * Polling 'interrupt' - used by things like netconsole to send skbs
6786 * without having to re-enable interrupts. It's not called while
6787 * the interrupt routine is executing.
6788 */
6789 static void ixgbe_netpoll(struct net_device *netdev)
6790 {
6791 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6792 int i;
6793
6794 /* if interface is down do nothing */
6795 if (test_bit(__IXGBE_DOWN, &adapter->state))
6796 return;
6797
6798 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
6799 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
6800 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
6801 for (i = 0; i < num_q_vectors; i++) {
6802 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
6803 ixgbe_msix_clean_many(0, q_vector);
6804 }
6805 } else {
6806 ixgbe_intr(adapter->pdev->irq, netdev);
6807 }
6808 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
6809 }
6810 #endif
6811
6812 static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
6813 struct rtnl_link_stats64 *stats)
6814 {
6815 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6816 int i;
6817
6818 /* accurate rx/tx bytes/packets stats */
6819 dev_txq_stats_fold(netdev, stats);
6820 rcu_read_lock();
6821 for (i = 0; i < adapter->num_rx_queues; i++) {
6822 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]);
6823 u64 bytes, packets;
6824 unsigned int start;
6825
6826 if (ring) {
6827 do {
6828 start = u64_stats_fetch_begin_bh(&ring->syncp);
6829 packets = ring->stats.packets;
6830 bytes = ring->stats.bytes;
6831 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
6832 stats->rx_packets += packets;
6833 stats->rx_bytes += bytes;
6834 }
6835 }
6836 rcu_read_unlock();
6837 /* following stats updated by ixgbe_watchdog_task() */
6838 stats->multicast = netdev->stats.multicast;
6839 stats->rx_errors = netdev->stats.rx_errors;
6840 stats->rx_length_errors = netdev->stats.rx_length_errors;
6841 stats->rx_crc_errors = netdev->stats.rx_crc_errors;
6842 stats->rx_missed_errors = netdev->stats.rx_missed_errors;
6843 return stats;
6844 }
6845
6846
6847 static const struct net_device_ops ixgbe_netdev_ops = {
6848 .ndo_open = ixgbe_open,
6849 .ndo_stop = ixgbe_close,
6850 .ndo_start_xmit = ixgbe_xmit_frame,
6851 .ndo_select_queue = ixgbe_select_queue,
6852 .ndo_set_rx_mode = ixgbe_set_rx_mode,
6853 .ndo_set_multicast_list = ixgbe_set_rx_mode,
6854 .ndo_validate_addr = eth_validate_addr,
6855 .ndo_set_mac_address = ixgbe_set_mac,
6856 .ndo_change_mtu = ixgbe_change_mtu,
6857 .ndo_tx_timeout = ixgbe_tx_timeout,
6858 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
6859 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
6860 .ndo_do_ioctl = ixgbe_ioctl,
6861 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
6862 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
6863 .ndo_set_vf_tx_rate = ixgbe_ndo_set_vf_bw,
6864 .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
6865 .ndo_get_stats64 = ixgbe_get_stats64,
6866 #ifdef CONFIG_NET_POLL_CONTROLLER
6867 .ndo_poll_controller = ixgbe_netpoll,
6868 #endif
6869 #ifdef IXGBE_FCOE
6870 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
6871 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
6872 .ndo_fcoe_enable = ixgbe_fcoe_enable,
6873 .ndo_fcoe_disable = ixgbe_fcoe_disable,
6874 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
6875 #endif /* IXGBE_FCOE */
6876 };
6877
6878 static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter,
6879 const struct ixgbe_info *ii)
6880 {
6881 #ifdef CONFIG_PCI_IOV
6882 struct ixgbe_hw *hw = &adapter->hw;
6883 int err;
6884
6885 if (hw->mac.type != ixgbe_mac_82599EB || !max_vfs)
6886 return;
6887
6888 /* The 82599 supports up to 64 VFs per physical function
6889 * but this implementation limits allocation to 63 so that
6890 * basic networking resources are still available to the
6891 * physical function
6892 */
6893 adapter->num_vfs = (max_vfs > 63) ? 63 : max_vfs;
6894 adapter->flags |= IXGBE_FLAG_SRIOV_ENABLED;
6895 err = pci_enable_sriov(adapter->pdev, adapter->num_vfs);
6896 if (err) {
6897 e_err(probe, "Failed to enable PCI sriov: %d\n", err);
6898 goto err_novfs;
6899 }
6900 /* If call to enable VFs succeeded then allocate memory
6901 * for per VF control structures.
6902 */
6903 adapter->vfinfo =
6904 kcalloc(adapter->num_vfs,
6905 sizeof(struct vf_data_storage), GFP_KERNEL);
6906 if (adapter->vfinfo) {
6907 /* Now that we're sure SR-IOV is enabled
6908 * and memory allocated set up the mailbox parameters
6909 */
6910 ixgbe_init_mbx_params_pf(hw);
6911 memcpy(&hw->mbx.ops, ii->mbx_ops,
6912 sizeof(hw->mbx.ops));
6913
6914 /* Disable RSC when in SR-IOV mode */
6915 adapter->flags2 &= ~(IXGBE_FLAG2_RSC_CAPABLE |
6916 IXGBE_FLAG2_RSC_ENABLED);
6917 return;
6918 }
6919
6920 /* Oh oh */
6921 e_err(probe, "Unable to allocate memory for VF Data Storage - "
6922 "SRIOV disabled\n");
6923 pci_disable_sriov(adapter->pdev);
6924
6925 err_novfs:
6926 adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
6927 adapter->num_vfs = 0;
6928 #endif /* CONFIG_PCI_IOV */
6929 }
6930
6931 /**
6932 * ixgbe_probe - Device Initialization Routine
6933 * @pdev: PCI device information struct
6934 * @ent: entry in ixgbe_pci_tbl
6935 *
6936 * Returns 0 on success, negative on failure
6937 *
6938 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
6939 * The OS initialization, configuring of the adapter private structure,
6940 * and a hardware reset occur.
6941 **/
6942 static int __devinit ixgbe_probe(struct pci_dev *pdev,
6943 const struct pci_device_id *ent)
6944 {
6945 struct net_device *netdev;
6946 struct ixgbe_adapter *adapter = NULL;
6947 struct ixgbe_hw *hw;
6948 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
6949 static int cards_found;
6950 int i, err, pci_using_dac;
6951 unsigned int indices = num_possible_cpus();
6952 #ifdef IXGBE_FCOE
6953 u16 device_caps;
6954 #endif
6955 u32 part_num, eec;
6956
6957 /* Catch broken hardware that put the wrong VF device ID in
6958 * the PCIe SR-IOV capability.
6959 */
6960 if (pdev->is_virtfn) {
6961 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
6962 pci_name(pdev), pdev->vendor, pdev->device);
6963 return -EINVAL;
6964 }
6965
6966 err = pci_enable_device_mem(pdev);
6967 if (err)
6968 return err;
6969
6970 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
6971 !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
6972 pci_using_dac = 1;
6973 } else {
6974 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
6975 if (err) {
6976 err = dma_set_coherent_mask(&pdev->dev,
6977 DMA_BIT_MASK(32));
6978 if (err) {
6979 dev_err(&pdev->dev,
6980 "No usable DMA configuration, aborting\n");
6981 goto err_dma;
6982 }
6983 }
6984 pci_using_dac = 0;
6985 }
6986
6987 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
6988 IORESOURCE_MEM), ixgbe_driver_name);
6989 if (err) {
6990 dev_err(&pdev->dev,
6991 "pci_request_selected_regions failed 0x%x\n", err);
6992 goto err_pci_reg;
6993 }
6994
6995 pci_enable_pcie_error_reporting(pdev);
6996
6997 pci_set_master(pdev);
6998 pci_save_state(pdev);
6999
7000 if (ii->mac == ixgbe_mac_82598EB)
7001 indices = min_t(unsigned int, indices, IXGBE_MAX_RSS_INDICES);
7002 else
7003 indices = min_t(unsigned int, indices, IXGBE_MAX_FDIR_INDICES);
7004
7005 indices = max_t(unsigned int, indices, IXGBE_MAX_DCB_INDICES);
7006 #ifdef IXGBE_FCOE
7007 indices += min_t(unsigned int, num_possible_cpus(),
7008 IXGBE_MAX_FCOE_INDICES);
7009 #endif
7010 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
7011 if (!netdev) {
7012 err = -ENOMEM;
7013 goto err_alloc_etherdev;
7014 }
7015
7016 SET_NETDEV_DEV(netdev, &pdev->dev);
7017
7018 adapter = netdev_priv(netdev);
7019 pci_set_drvdata(pdev, adapter);
7020
7021 adapter->netdev = netdev;
7022 adapter->pdev = pdev;
7023 hw = &adapter->hw;
7024 hw->back = adapter;
7025 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
7026
7027 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
7028 pci_resource_len(pdev, 0));
7029 if (!hw->hw_addr) {
7030 err = -EIO;
7031 goto err_ioremap;
7032 }
7033
7034 for (i = 1; i <= 5; i++) {
7035 if (pci_resource_len(pdev, i) == 0)
7036 continue;
7037 }
7038
7039 netdev->netdev_ops = &ixgbe_netdev_ops;
7040 ixgbe_set_ethtool_ops(netdev);
7041 netdev->watchdog_timeo = 5 * HZ;
7042 strcpy(netdev->name, pci_name(pdev));
7043
7044 adapter->bd_number = cards_found;
7045
7046 /* Setup hw api */
7047 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
7048 hw->mac.type = ii->mac;
7049
7050 /* EEPROM */
7051 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
7052 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
7053 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
7054 if (!(eec & (1 << 8)))
7055 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
7056
7057 /* PHY */
7058 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
7059 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
7060 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
7061 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
7062 hw->phy.mdio.mmds = 0;
7063 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
7064 hw->phy.mdio.dev = netdev;
7065 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
7066 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
7067
7068 /* set up this timer and work struct before calling get_invariants
7069 * which might start the timer
7070 */
7071 init_timer(&adapter->sfp_timer);
7072 adapter->sfp_timer.function = ixgbe_sfp_timer;
7073 adapter->sfp_timer.data = (unsigned long) adapter;
7074
7075 INIT_WORK(&adapter->sfp_task, ixgbe_sfp_task);
7076
7077 /* multispeed fiber has its own tasklet, called from GPI SDP1 context */
7078 INIT_WORK(&adapter->multispeed_fiber_task, ixgbe_multispeed_fiber_task);
7079
7080 /* a new SFP+ module arrival, called from GPI SDP2 context */
7081 INIT_WORK(&adapter->sfp_config_module_task,
7082 ixgbe_sfp_config_module_task);
7083
7084 ii->get_invariants(hw);
7085
7086 /* setup the private structure */
7087 err = ixgbe_sw_init(adapter);
7088 if (err)
7089 goto err_sw_init;
7090
7091 /* Make it possible the adapter to be woken up via WOL */
7092 switch (adapter->hw.mac.type) {
7093 case ixgbe_mac_82599EB:
7094 case ixgbe_mac_X540:
7095 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7096 break;
7097 default:
7098 break;
7099 }
7100
7101 /*
7102 * If there is a fan on this device and it has failed log the
7103 * failure.
7104 */
7105 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
7106 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
7107 if (esdp & IXGBE_ESDP_SDP1)
7108 e_crit(probe, "Fan has stopped, replace the adapter\n");
7109 }
7110
7111 /* reset_hw fills in the perm_addr as well */
7112 hw->phy.reset_if_overtemp = true;
7113 err = hw->mac.ops.reset_hw(hw);
7114 hw->phy.reset_if_overtemp = false;
7115 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
7116 hw->mac.type == ixgbe_mac_82598EB) {
7117 /*
7118 * Start a kernel thread to watch for a module to arrive.
7119 * Only do this for 82598, since 82599 will generate
7120 * interrupts on module arrival.
7121 */
7122 set_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
7123 mod_timer(&adapter->sfp_timer,
7124 round_jiffies(jiffies + (2 * HZ)));
7125 err = 0;
7126 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
7127 e_dev_err("failed to initialize because an unsupported SFP+ "
7128 "module type was detected.\n");
7129 e_dev_err("Reload the driver after installing a supported "
7130 "module.\n");
7131 goto err_sw_init;
7132 } else if (err) {
7133 e_dev_err("HW Init failed: %d\n", err);
7134 goto err_sw_init;
7135 }
7136
7137 ixgbe_probe_vf(adapter, ii);
7138
7139 netdev->features = NETIF_F_SG |
7140 NETIF_F_IP_CSUM |
7141 NETIF_F_HW_VLAN_TX |
7142 NETIF_F_HW_VLAN_RX |
7143 NETIF_F_HW_VLAN_FILTER;
7144
7145 netdev->features |= NETIF_F_IPV6_CSUM;
7146 netdev->features |= NETIF_F_TSO;
7147 netdev->features |= NETIF_F_TSO6;
7148 netdev->features |= NETIF_F_GRO;
7149
7150 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
7151 netdev->features |= NETIF_F_SCTP_CSUM;
7152
7153 netdev->vlan_features |= NETIF_F_TSO;
7154 netdev->vlan_features |= NETIF_F_TSO6;
7155 netdev->vlan_features |= NETIF_F_IP_CSUM;
7156 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
7157 netdev->vlan_features |= NETIF_F_SG;
7158
7159 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7160 adapter->flags &= ~(IXGBE_FLAG_RSS_ENABLED |
7161 IXGBE_FLAG_DCB_ENABLED);
7162 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
7163 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
7164
7165 #ifdef CONFIG_IXGBE_DCB
7166 netdev->dcbnl_ops = &dcbnl_ops;
7167 #endif
7168
7169 #ifdef IXGBE_FCOE
7170 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
7171 if (hw->mac.ops.get_device_caps) {
7172 hw->mac.ops.get_device_caps(hw, &device_caps);
7173 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
7174 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
7175 }
7176 }
7177 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
7178 netdev->vlan_features |= NETIF_F_FCOE_CRC;
7179 netdev->vlan_features |= NETIF_F_FSO;
7180 netdev->vlan_features |= NETIF_F_FCOE_MTU;
7181 }
7182 #endif /* IXGBE_FCOE */
7183 if (pci_using_dac) {
7184 netdev->features |= NETIF_F_HIGHDMA;
7185 netdev->vlan_features |= NETIF_F_HIGHDMA;
7186 }
7187
7188 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
7189 netdev->features |= NETIF_F_LRO;
7190
7191 /* make sure the EEPROM is good */
7192 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
7193 e_dev_err("The EEPROM Checksum Is Not Valid\n");
7194 err = -EIO;
7195 goto err_eeprom;
7196 }
7197
7198 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
7199 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
7200
7201 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
7202 e_dev_err("invalid MAC address\n");
7203 err = -EIO;
7204 goto err_eeprom;
7205 }
7206
7207 /* power down the optics for multispeed fiber and 82599 SFP+ fiber */
7208 if (hw->mac.ops.disable_tx_laser &&
7209 ((hw->phy.multispeed_fiber) ||
7210 ((hw->phy.type == ixgbe_media_type_fiber) &&
7211 (hw->mac.type == ixgbe_mac_82599EB))))
7212 hw->mac.ops.disable_tx_laser(hw);
7213
7214 init_timer(&adapter->watchdog_timer);
7215 adapter->watchdog_timer.function = ixgbe_watchdog;
7216 adapter->watchdog_timer.data = (unsigned long)adapter;
7217
7218 INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
7219 INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
7220
7221 err = ixgbe_init_interrupt_scheme(adapter);
7222 if (err)
7223 goto err_sw_init;
7224
7225 switch (pdev->device) {
7226 case IXGBE_DEV_ID_82599_SFP:
7227 /* Only this subdevice supports WOL */
7228 if (pdev->subsystem_device == IXGBE_SUBDEV_ID_82599_SFP)
7229 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
7230 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
7231 break;
7232 case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
7233 /* All except this subdevice support WOL */
7234 if (pdev->subsystem_device != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ)
7235 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
7236 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
7237 break;
7238 case IXGBE_DEV_ID_82599_KX4:
7239 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
7240 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
7241 break;
7242 default:
7243 adapter->wol = 0;
7244 break;
7245 }
7246 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
7247
7248 /* pick up the PCI bus settings for reporting later */
7249 hw->mac.ops.get_bus_info(hw);
7250
7251 /* print bus type/speed/width info */
7252 e_dev_info("(PCI Express:%s:%s) %pM\n",
7253 (hw->bus.speed == ixgbe_bus_speed_5000 ? "5.0Gb/s" :
7254 hw->bus.speed == ixgbe_bus_speed_2500 ? "2.5Gb/s" :
7255 "Unknown"),
7256 (hw->bus.width == ixgbe_bus_width_pcie_x8 ? "Width x8" :
7257 hw->bus.width == ixgbe_bus_width_pcie_x4 ? "Width x4" :
7258 hw->bus.width == ixgbe_bus_width_pcie_x1 ? "Width x1" :
7259 "Unknown"),
7260 netdev->dev_addr);
7261 ixgbe_read_pba_num_generic(hw, &part_num);
7262 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
7263 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, "
7264 "PBA No: %06x-%03x\n",
7265 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
7266 (part_num >> 8), (part_num & 0xff));
7267 else
7268 e_dev_info("MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
7269 hw->mac.type, hw->phy.type,
7270 (part_num >> 8), (part_num & 0xff));
7271
7272 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
7273 e_dev_warn("PCI-Express bandwidth available for this card is "
7274 "not sufficient for optimal performance.\n");
7275 e_dev_warn("For optimal performance a x8 PCI-Express slot "
7276 "is required.\n");
7277 }
7278
7279 /* save off EEPROM version number */
7280 hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
7281
7282 /* reset the hardware with the new settings */
7283 err = hw->mac.ops.start_hw(hw);
7284
7285 if (err == IXGBE_ERR_EEPROM_VERSION) {
7286 /* We are running on a pre-production device, log a warning */
7287 e_dev_warn("This device is a pre-production adapter/LOM. "
7288 "Please be aware there may be issues associated "
7289 "with your hardware. If you are experiencing "
7290 "problems please contact your Intel or hardware "
7291 "representative who provided you with this "
7292 "hardware.\n");
7293 }
7294 strcpy(netdev->name, "eth%d");
7295 err = register_netdev(netdev);
7296 if (err)
7297 goto err_register;
7298
7299 /* carrier off reporting is important to ethtool even BEFORE open */
7300 netif_carrier_off(netdev);
7301
7302 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
7303 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
7304 INIT_WORK(&adapter->fdir_reinit_task, ixgbe_fdir_reinit_task);
7305
7306 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
7307 INIT_WORK(&adapter->check_overtemp_task,
7308 ixgbe_check_overtemp_task);
7309 #ifdef CONFIG_IXGBE_DCA
7310 if (dca_add_requester(&pdev->dev) == 0) {
7311 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
7312 ixgbe_setup_dca(adapter);
7313 }
7314 #endif
7315 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
7316 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
7317 for (i = 0; i < adapter->num_vfs; i++)
7318 ixgbe_vf_configuration(pdev, (i | 0x10000000));
7319 }
7320
7321 /* add san mac addr to netdev */
7322 ixgbe_add_sanmac_netdev(netdev);
7323
7324 e_dev_info("Intel(R) 10 Gigabit Network Connection\n");
7325 cards_found++;
7326 return 0;
7327
7328 err_register:
7329 ixgbe_release_hw_control(adapter);
7330 ixgbe_clear_interrupt_scheme(adapter);
7331 err_sw_init:
7332 err_eeprom:
7333 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7334 ixgbe_disable_sriov(adapter);
7335 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
7336 del_timer_sync(&adapter->sfp_timer);
7337 cancel_work_sync(&adapter->sfp_task);
7338 cancel_work_sync(&adapter->multispeed_fiber_task);
7339 cancel_work_sync(&adapter->sfp_config_module_task);
7340 iounmap(hw->hw_addr);
7341 err_ioremap:
7342 free_netdev(netdev);
7343 err_alloc_etherdev:
7344 pci_release_selected_regions(pdev,
7345 pci_select_bars(pdev, IORESOURCE_MEM));
7346 err_pci_reg:
7347 err_dma:
7348 pci_disable_device(pdev);
7349 return err;
7350 }
7351
7352 /**
7353 * ixgbe_remove - Device Removal Routine
7354 * @pdev: PCI device information struct
7355 *
7356 * ixgbe_remove is called by the PCI subsystem to alert the driver
7357 * that it should release a PCI device. The could be caused by a
7358 * Hot-Plug event, or because the driver is going to be removed from
7359 * memory.
7360 **/
7361 static void __devexit ixgbe_remove(struct pci_dev *pdev)
7362 {
7363 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7364 struct net_device *netdev = adapter->netdev;
7365
7366 set_bit(__IXGBE_DOWN, &adapter->state);
7367 /* clear the module not found bit to make sure the worker won't
7368 * reschedule
7369 */
7370 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
7371 del_timer_sync(&adapter->watchdog_timer);
7372
7373 del_timer_sync(&adapter->sfp_timer);
7374 cancel_work_sync(&adapter->watchdog_task);
7375 cancel_work_sync(&adapter->sfp_task);
7376 cancel_work_sync(&adapter->multispeed_fiber_task);
7377 cancel_work_sync(&adapter->sfp_config_module_task);
7378 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
7379 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
7380 cancel_work_sync(&adapter->fdir_reinit_task);
7381 flush_scheduled_work();
7382
7383 #ifdef CONFIG_IXGBE_DCA
7384 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
7385 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
7386 dca_remove_requester(&pdev->dev);
7387 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
7388 }
7389
7390 #endif
7391 #ifdef IXGBE_FCOE
7392 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
7393 ixgbe_cleanup_fcoe(adapter);
7394
7395 #endif /* IXGBE_FCOE */
7396
7397 /* remove the added san mac */
7398 ixgbe_del_sanmac_netdev(netdev);
7399
7400 if (netdev->reg_state == NETREG_REGISTERED)
7401 unregister_netdev(netdev);
7402
7403 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7404 ixgbe_disable_sriov(adapter);
7405
7406 ixgbe_clear_interrupt_scheme(adapter);
7407
7408 ixgbe_release_hw_control(adapter);
7409
7410 iounmap(adapter->hw.hw_addr);
7411 pci_release_selected_regions(pdev, pci_select_bars(pdev,
7412 IORESOURCE_MEM));
7413
7414 e_dev_info("complete\n");
7415
7416 free_netdev(netdev);
7417
7418 pci_disable_pcie_error_reporting(pdev);
7419
7420 pci_disable_device(pdev);
7421 }
7422
7423 /**
7424 * ixgbe_io_error_detected - called when PCI error is detected
7425 * @pdev: Pointer to PCI device
7426 * @state: The current pci connection state
7427 *
7428 * This function is called after a PCI bus error affecting
7429 * this device has been detected.
7430 */
7431 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
7432 pci_channel_state_t state)
7433 {
7434 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7435 struct net_device *netdev = adapter->netdev;
7436
7437 netif_device_detach(netdev);
7438
7439 if (state == pci_channel_io_perm_failure)
7440 return PCI_ERS_RESULT_DISCONNECT;
7441
7442 if (netif_running(netdev))
7443 ixgbe_down(adapter);
7444 pci_disable_device(pdev);
7445
7446 /* Request a slot reset. */
7447 return PCI_ERS_RESULT_NEED_RESET;
7448 }
7449
7450 /**
7451 * ixgbe_io_slot_reset - called after the pci bus has been reset.
7452 * @pdev: Pointer to PCI device
7453 *
7454 * Restart the card from scratch, as if from a cold-boot.
7455 */
7456 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
7457 {
7458 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7459 pci_ers_result_t result;
7460 int err;
7461
7462 if (pci_enable_device_mem(pdev)) {
7463 e_err(probe, "Cannot re-enable PCI device after reset.\n");
7464 result = PCI_ERS_RESULT_DISCONNECT;
7465 } else {
7466 pci_set_master(pdev);
7467 pci_restore_state(pdev);
7468 pci_save_state(pdev);
7469
7470 pci_wake_from_d3(pdev, false);
7471
7472 ixgbe_reset(adapter);
7473 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7474 result = PCI_ERS_RESULT_RECOVERED;
7475 }
7476
7477 err = pci_cleanup_aer_uncorrect_error_status(pdev);
7478 if (err) {
7479 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
7480 "failed 0x%0x\n", err);
7481 /* non-fatal, continue */
7482 }
7483
7484 return result;
7485 }
7486
7487 /**
7488 * ixgbe_io_resume - called when traffic can start flowing again.
7489 * @pdev: Pointer to PCI device
7490 *
7491 * This callback is called when the error recovery driver tells us that
7492 * its OK to resume normal operation.
7493 */
7494 static void ixgbe_io_resume(struct pci_dev *pdev)
7495 {
7496 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7497 struct net_device *netdev = adapter->netdev;
7498
7499 if (netif_running(netdev)) {
7500 if (ixgbe_up(adapter)) {
7501 e_info(probe, "ixgbe_up failed after reset\n");
7502 return;
7503 }
7504 }
7505
7506 netif_device_attach(netdev);
7507 }
7508
7509 static struct pci_error_handlers ixgbe_err_handler = {
7510 .error_detected = ixgbe_io_error_detected,
7511 .slot_reset = ixgbe_io_slot_reset,
7512 .resume = ixgbe_io_resume,
7513 };
7514
7515 static struct pci_driver ixgbe_driver = {
7516 .name = ixgbe_driver_name,
7517 .id_table = ixgbe_pci_tbl,
7518 .probe = ixgbe_probe,
7519 .remove = __devexit_p(ixgbe_remove),
7520 #ifdef CONFIG_PM
7521 .suspend = ixgbe_suspend,
7522 .resume = ixgbe_resume,
7523 #endif
7524 .shutdown = ixgbe_shutdown,
7525 .err_handler = &ixgbe_err_handler
7526 };
7527
7528 /**
7529 * ixgbe_init_module - Driver Registration Routine
7530 *
7531 * ixgbe_init_module is the first routine called when the driver is
7532 * loaded. All it does is register with the PCI subsystem.
7533 **/
7534 static int __init ixgbe_init_module(void)
7535 {
7536 int ret;
7537 pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
7538 pr_info("%s\n", ixgbe_copyright);
7539
7540 #ifdef CONFIG_IXGBE_DCA
7541 dca_register_notify(&dca_notifier);
7542 #endif
7543
7544 ret = pci_register_driver(&ixgbe_driver);
7545 return ret;
7546 }
7547
7548 module_init(ixgbe_init_module);
7549
7550 /**
7551 * ixgbe_exit_module - Driver Exit Cleanup Routine
7552 *
7553 * ixgbe_exit_module is called just before the driver is removed
7554 * from memory.
7555 **/
7556 static void __exit ixgbe_exit_module(void)
7557 {
7558 #ifdef CONFIG_IXGBE_DCA
7559 dca_unregister_notify(&dca_notifier);
7560 #endif
7561 pci_unregister_driver(&ixgbe_driver);
7562 rcu_barrier(); /* Wait for completion of call_rcu()'s */
7563 }
7564
7565 #ifdef CONFIG_IXGBE_DCA
7566 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
7567 void *p)
7568 {
7569 int ret_val;
7570
7571 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
7572 __ixgbe_notify_dca);
7573
7574 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
7575 }
7576
7577 #endif /* CONFIG_IXGBE_DCA */
7578
7579 /**
7580 * ixgbe_get_hw_dev return device
7581 * used by hardware layer to print debugging information
7582 **/
7583 struct net_device *ixgbe_get_hw_dev(struct ixgbe_hw *hw)
7584 {
7585 struct ixgbe_adapter *adapter = hw->back;
7586 return adapter->netdev;
7587 }
7588
7589 module_exit(ixgbe_exit_module);
7590
7591 /* ixgbe_main.c */
kernel source for telekom puls (alcatel/mediatek)