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