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Merge tag 'defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[deliverable/linux.git] / drivers / net / ethernet / intel / ixgbe / ixgbe_main.c
1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2012 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26 *******************************************************************************/
27
28 #include <linux/types.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/netdevice.h>
32 #include <linux/vmalloc.h>
33 #include <linux/string.h>
34 #include <linux/in.h>
35 #include <linux/interrupt.h>
36 #include <linux/ip.h>
37 #include <linux/tcp.h>
38 #include <linux/sctp.h>
39 #include <linux/pkt_sched.h>
40 #include <linux/ipv6.h>
41 #include <linux/slab.h>
42 #include <net/checksum.h>
43 #include <net/ip6_checksum.h>
44 #include <linux/ethtool.h>
45 #include <linux/if.h>
46 #include <linux/if_vlan.h>
47 #include <linux/prefetch.h>
48 #include <scsi/fc/fc_fcoe.h>
49
50 #include "ixgbe.h"
51 #include "ixgbe_common.h"
52 #include "ixgbe_dcb_82599.h"
53 #include "ixgbe_sriov.h"
54
55 char ixgbe_driver_name[] = "ixgbe";
56 static const char ixgbe_driver_string[] =
57 "Intel(R) 10 Gigabit PCI Express Network Driver";
58 #ifdef IXGBE_FCOE
59 char ixgbe_default_device_descr[] =
60 "Intel(R) 10 Gigabit Network Connection";
61 #else
62 static char ixgbe_default_device_descr[] =
63 "Intel(R) 10 Gigabit Network Connection";
64 #endif
65 #define MAJ 3
66 #define MIN 9
67 #define BUILD 15
68 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \
69 __stringify(BUILD) "-k"
70 const char ixgbe_driver_version[] = DRV_VERSION;
71 static const char ixgbe_copyright[] =
72 "Copyright (c) 1999-2012 Intel Corporation.";
73
74 static const struct ixgbe_info *ixgbe_info_tbl[] = {
75 [board_82598] = &ixgbe_82598_info,
76 [board_82599] = &ixgbe_82599_info,
77 [board_X540] = &ixgbe_X540_info,
78 };
79
80 /* ixgbe_pci_tbl - PCI Device ID Table
81 *
82 * Wildcard entries (PCI_ANY_ID) should come last
83 * Last entry must be all 0s
84 *
85 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
86 * Class, Class Mask, private data (not used) }
87 */
88 static DEFINE_PCI_DEVICE_TABLE(ixgbe_pci_tbl) = {
89 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598), board_82598 },
90 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT), board_82598 },
91 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT), board_82598 },
92 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT), board_82598 },
93 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2), board_82598 },
94 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4), board_82598 },
95 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT), board_82598 },
96 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT), board_82598 },
97 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM), board_82598 },
98 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR), board_82598 },
99 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM), board_82598 },
100 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX), board_82598 },
101 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4), board_82599 },
102 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM), board_82599 },
103 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR), board_82599 },
104 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP), board_82599 },
105 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM), board_82599 },
106 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ), board_82599 },
107 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4), board_82599 },
108 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_BACKPLANE_FCOE), board_82599 },
109 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_FCOE), board_82599 },
110 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM), board_82599 },
111 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE), board_82599 },
112 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T), board_X540 },
113 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF2), board_82599 },
114 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_LS), board_82599 },
115 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599EN_SFP), board_82599 },
116 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF_QP), board_82599 },
117 /* required last entry */
118 {0, }
119 };
120 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
121
122 #ifdef CONFIG_IXGBE_DCA
123 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
124 void *p);
125 static struct notifier_block dca_notifier = {
126 .notifier_call = ixgbe_notify_dca,
127 .next = NULL,
128 .priority = 0
129 };
130 #endif
131
132 #ifdef CONFIG_PCI_IOV
133 static unsigned int max_vfs;
134 module_param(max_vfs, uint, 0);
135 MODULE_PARM_DESC(max_vfs,
136 "Maximum number of virtual functions to allocate per physical function - default is zero and maximum value is 63");
137 #endif /* CONFIG_PCI_IOV */
138
139 static unsigned int allow_unsupported_sfp;
140 module_param(allow_unsupported_sfp, uint, 0);
141 MODULE_PARM_DESC(allow_unsupported_sfp,
142 "Allow unsupported and untested SFP+ modules on 82599-based adapters");
143
144 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
145 static int debug = -1;
146 module_param(debug, int, 0);
147 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
148
149 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
150 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
151 MODULE_LICENSE("GPL");
152 MODULE_VERSION(DRV_VERSION);
153
154 static void ixgbe_service_event_schedule(struct ixgbe_adapter *adapter)
155 {
156 if (!test_bit(__IXGBE_DOWN, &adapter->state) &&
157 !test_and_set_bit(__IXGBE_SERVICE_SCHED, &adapter->state))
158 schedule_work(&adapter->service_task);
159 }
160
161 static void ixgbe_service_event_complete(struct ixgbe_adapter *adapter)
162 {
163 BUG_ON(!test_bit(__IXGBE_SERVICE_SCHED, &adapter->state));
164
165 /* flush memory to make sure state is correct before next watchdog */
166 smp_mb__before_clear_bit();
167 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
168 }
169
170 struct ixgbe_reg_info {
171 u32 ofs;
172 char *name;
173 };
174
175 static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {
176
177 /* General Registers */
178 {IXGBE_CTRL, "CTRL"},
179 {IXGBE_STATUS, "STATUS"},
180 {IXGBE_CTRL_EXT, "CTRL_EXT"},
181
182 /* Interrupt Registers */
183 {IXGBE_EICR, "EICR"},
184
185 /* RX Registers */
186 {IXGBE_SRRCTL(0), "SRRCTL"},
187 {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
188 {IXGBE_RDLEN(0), "RDLEN"},
189 {IXGBE_RDH(0), "RDH"},
190 {IXGBE_RDT(0), "RDT"},
191 {IXGBE_RXDCTL(0), "RXDCTL"},
192 {IXGBE_RDBAL(0), "RDBAL"},
193 {IXGBE_RDBAH(0), "RDBAH"},
194
195 /* TX Registers */
196 {IXGBE_TDBAL(0), "TDBAL"},
197 {IXGBE_TDBAH(0), "TDBAH"},
198 {IXGBE_TDLEN(0), "TDLEN"},
199 {IXGBE_TDH(0), "TDH"},
200 {IXGBE_TDT(0), "TDT"},
201 {IXGBE_TXDCTL(0), "TXDCTL"},
202
203 /* List Terminator */
204 {}
205 };
206
207
208 /*
209 * ixgbe_regdump - register printout routine
210 */
211 static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
212 {
213 int i = 0, j = 0;
214 char rname[16];
215 u32 regs[64];
216
217 switch (reginfo->ofs) {
218 case IXGBE_SRRCTL(0):
219 for (i = 0; i < 64; i++)
220 regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
221 break;
222 case IXGBE_DCA_RXCTRL(0):
223 for (i = 0; i < 64; i++)
224 regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
225 break;
226 case IXGBE_RDLEN(0):
227 for (i = 0; i < 64; i++)
228 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
229 break;
230 case IXGBE_RDH(0):
231 for (i = 0; i < 64; i++)
232 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
233 break;
234 case IXGBE_RDT(0):
235 for (i = 0; i < 64; i++)
236 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
237 break;
238 case IXGBE_RXDCTL(0):
239 for (i = 0; i < 64; i++)
240 regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
241 break;
242 case IXGBE_RDBAL(0):
243 for (i = 0; i < 64; i++)
244 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
245 break;
246 case IXGBE_RDBAH(0):
247 for (i = 0; i < 64; i++)
248 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
249 break;
250 case IXGBE_TDBAL(0):
251 for (i = 0; i < 64; i++)
252 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
253 break;
254 case IXGBE_TDBAH(0):
255 for (i = 0; i < 64; i++)
256 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
257 break;
258 case IXGBE_TDLEN(0):
259 for (i = 0; i < 64; i++)
260 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
261 break;
262 case IXGBE_TDH(0):
263 for (i = 0; i < 64; i++)
264 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
265 break;
266 case IXGBE_TDT(0):
267 for (i = 0; i < 64; i++)
268 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
269 break;
270 case IXGBE_TXDCTL(0):
271 for (i = 0; i < 64; i++)
272 regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
273 break;
274 default:
275 pr_info("%-15s %08x\n", reginfo->name,
276 IXGBE_READ_REG(hw, reginfo->ofs));
277 return;
278 }
279
280 for (i = 0; i < 8; i++) {
281 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7);
282 pr_err("%-15s", rname);
283 for (j = 0; j < 8; j++)
284 pr_cont(" %08x", regs[i*8+j]);
285 pr_cont("\n");
286 }
287
288 }
289
290 /*
291 * ixgbe_dump - Print registers, tx-rings and rx-rings
292 */
293 static void ixgbe_dump(struct ixgbe_adapter *adapter)
294 {
295 struct net_device *netdev = adapter->netdev;
296 struct ixgbe_hw *hw = &adapter->hw;
297 struct ixgbe_reg_info *reginfo;
298 int n = 0;
299 struct ixgbe_ring *tx_ring;
300 struct ixgbe_tx_buffer *tx_buffer;
301 union ixgbe_adv_tx_desc *tx_desc;
302 struct my_u0 { u64 a; u64 b; } *u0;
303 struct ixgbe_ring *rx_ring;
304 union ixgbe_adv_rx_desc *rx_desc;
305 struct ixgbe_rx_buffer *rx_buffer_info;
306 u32 staterr;
307 int i = 0;
308
309 if (!netif_msg_hw(adapter))
310 return;
311
312 /* Print netdevice Info */
313 if (netdev) {
314 dev_info(&adapter->pdev->dev, "Net device Info\n");
315 pr_info("Device Name state "
316 "trans_start last_rx\n");
317 pr_info("%-15s %016lX %016lX %016lX\n",
318 netdev->name,
319 netdev->state,
320 netdev->trans_start,
321 netdev->last_rx);
322 }
323
324 /* Print Registers */
325 dev_info(&adapter->pdev->dev, "Register Dump\n");
326 pr_info(" Register Name Value\n");
327 for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
328 reginfo->name; reginfo++) {
329 ixgbe_regdump(hw, reginfo);
330 }
331
332 /* Print TX Ring Summary */
333 if (!netdev || !netif_running(netdev))
334 goto exit;
335
336 dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
337 pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n");
338 for (n = 0; n < adapter->num_tx_queues; n++) {
339 tx_ring = adapter->tx_ring[n];
340 tx_buffer = &tx_ring->tx_buffer_info[tx_ring->next_to_clean];
341 pr_info(" %5d %5X %5X %016llX %04X %p %016llX\n",
342 n, tx_ring->next_to_use, tx_ring->next_to_clean,
343 (u64)dma_unmap_addr(tx_buffer, dma),
344 dma_unmap_len(tx_buffer, len),
345 tx_buffer->next_to_watch,
346 (u64)tx_buffer->time_stamp);
347 }
348
349 /* Print TX Rings */
350 if (!netif_msg_tx_done(adapter))
351 goto rx_ring_summary;
352
353 dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
354
355 /* Transmit Descriptor Formats
356 *
357 * Advanced Transmit Descriptor
358 * +--------------------------------------------------------------+
359 * 0 | Buffer Address [63:0] |
360 * +--------------------------------------------------------------+
361 * 8 | PAYLEN | PORTS | IDX | STA | DCMD |DTYP | RSV | DTALEN |
362 * +--------------------------------------------------------------+
363 * 63 46 45 40 39 36 35 32 31 24 23 20 19 0
364 */
365
366 for (n = 0; n < adapter->num_tx_queues; n++) {
367 tx_ring = adapter->tx_ring[n];
368 pr_info("------------------------------------\n");
369 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index);
370 pr_info("------------------------------------\n");
371 pr_info("T [desc] [address 63:0 ] "
372 "[PlPOIdStDDt Ln] [bi->dma ] "
373 "leng ntw timestamp bi->skb\n");
374
375 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
376 tx_desc = IXGBE_TX_DESC(tx_ring, i);
377 tx_buffer = &tx_ring->tx_buffer_info[i];
378 u0 = (struct my_u0 *)tx_desc;
379 pr_info("T [0x%03X] %016llX %016llX %016llX"
380 " %04X %p %016llX %p", i,
381 le64_to_cpu(u0->a),
382 le64_to_cpu(u0->b),
383 (u64)dma_unmap_addr(tx_buffer, dma),
384 dma_unmap_len(tx_buffer, len),
385 tx_buffer->next_to_watch,
386 (u64)tx_buffer->time_stamp,
387 tx_buffer->skb);
388 if (i == tx_ring->next_to_use &&
389 i == tx_ring->next_to_clean)
390 pr_cont(" NTC/U\n");
391 else if (i == tx_ring->next_to_use)
392 pr_cont(" NTU\n");
393 else if (i == tx_ring->next_to_clean)
394 pr_cont(" NTC\n");
395 else
396 pr_cont("\n");
397
398 if (netif_msg_pktdata(adapter) &&
399 dma_unmap_len(tx_buffer, len) != 0)
400 print_hex_dump(KERN_INFO, "",
401 DUMP_PREFIX_ADDRESS, 16, 1,
402 phys_to_virt(dma_unmap_addr(tx_buffer,
403 dma)),
404 dma_unmap_len(tx_buffer, len),
405 true);
406 }
407 }
408
409 /* Print RX Rings Summary */
410 rx_ring_summary:
411 dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
412 pr_info("Queue [NTU] [NTC]\n");
413 for (n = 0; n < adapter->num_rx_queues; n++) {
414 rx_ring = adapter->rx_ring[n];
415 pr_info("%5d %5X %5X\n",
416 n, rx_ring->next_to_use, rx_ring->next_to_clean);
417 }
418
419 /* Print RX Rings */
420 if (!netif_msg_rx_status(adapter))
421 goto exit;
422
423 dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
424
425 /* Advanced Receive Descriptor (Read) Format
426 * 63 1 0
427 * +-----------------------------------------------------+
428 * 0 | Packet Buffer Address [63:1] |A0/NSE|
429 * +----------------------------------------------+------+
430 * 8 | Header Buffer Address [63:1] | DD |
431 * +-----------------------------------------------------+
432 *
433 *
434 * Advanced Receive Descriptor (Write-Back) Format
435 *
436 * 63 48 47 32 31 30 21 20 16 15 4 3 0
437 * +------------------------------------------------------+
438 * 0 | Packet IP |SPH| HDR_LEN | RSV|Packet| RSS |
439 * | Checksum Ident | | | | Type | Type |
440 * +------------------------------------------------------+
441 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
442 * +------------------------------------------------------+
443 * 63 48 47 32 31 20 19 0
444 */
445 for (n = 0; n < adapter->num_rx_queues; n++) {
446 rx_ring = adapter->rx_ring[n];
447 pr_info("------------------------------------\n");
448 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index);
449 pr_info("------------------------------------\n");
450 pr_info("R [desc] [ PktBuf A0] "
451 "[ HeadBuf DD] [bi->dma ] [bi->skb] "
452 "<-- Adv Rx Read format\n");
453 pr_info("RWB[desc] [PcsmIpSHl PtRs] "
454 "[vl er S cks ln] ---------------- [bi->skb] "
455 "<-- Adv Rx Write-Back format\n");
456
457 for (i = 0; i < rx_ring->count; i++) {
458 rx_buffer_info = &rx_ring->rx_buffer_info[i];
459 rx_desc = IXGBE_RX_DESC(rx_ring, i);
460 u0 = (struct my_u0 *)rx_desc;
461 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
462 if (staterr & IXGBE_RXD_STAT_DD) {
463 /* Descriptor Done */
464 pr_info("RWB[0x%03X] %016llX "
465 "%016llX ---------------- %p", i,
466 le64_to_cpu(u0->a),
467 le64_to_cpu(u0->b),
468 rx_buffer_info->skb);
469 } else {
470 pr_info("R [0x%03X] %016llX "
471 "%016llX %016llX %p", i,
472 le64_to_cpu(u0->a),
473 le64_to_cpu(u0->b),
474 (u64)rx_buffer_info->dma,
475 rx_buffer_info->skb);
476
477 if (netif_msg_pktdata(adapter)) {
478 print_hex_dump(KERN_INFO, "",
479 DUMP_PREFIX_ADDRESS, 16, 1,
480 phys_to_virt(rx_buffer_info->dma),
481 ixgbe_rx_bufsz(rx_ring), true);
482 }
483 }
484
485 if (i == rx_ring->next_to_use)
486 pr_cont(" NTU\n");
487 else if (i == rx_ring->next_to_clean)
488 pr_cont(" NTC\n");
489 else
490 pr_cont("\n");
491
492 }
493 }
494
495 exit:
496 return;
497 }
498
499 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
500 {
501 u32 ctrl_ext;
502
503 /* Let firmware take over control of h/w */
504 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
505 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
506 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
507 }
508
509 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
510 {
511 u32 ctrl_ext;
512
513 /* Let firmware know the driver has taken over */
514 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
515 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
516 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
517 }
518
519 /*
520 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
521 * @adapter: pointer to adapter struct
522 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
523 * @queue: queue to map the corresponding interrupt to
524 * @msix_vector: the vector to map to the corresponding queue
525 *
526 */
527 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
528 u8 queue, u8 msix_vector)
529 {
530 u32 ivar, index;
531 struct ixgbe_hw *hw = &adapter->hw;
532 switch (hw->mac.type) {
533 case ixgbe_mac_82598EB:
534 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
535 if (direction == -1)
536 direction = 0;
537 index = (((direction * 64) + queue) >> 2) & 0x1F;
538 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
539 ivar &= ~(0xFF << (8 * (queue & 0x3)));
540 ivar |= (msix_vector << (8 * (queue & 0x3)));
541 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
542 break;
543 case ixgbe_mac_82599EB:
544 case ixgbe_mac_X540:
545 if (direction == -1) {
546 /* other causes */
547 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
548 index = ((queue & 1) * 8);
549 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
550 ivar &= ~(0xFF << index);
551 ivar |= (msix_vector << index);
552 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
553 break;
554 } else {
555 /* tx or rx causes */
556 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
557 index = ((16 * (queue & 1)) + (8 * direction));
558 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
559 ivar &= ~(0xFF << index);
560 ivar |= (msix_vector << index);
561 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
562 break;
563 }
564 default:
565 break;
566 }
567 }
568
569 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
570 u64 qmask)
571 {
572 u32 mask;
573
574 switch (adapter->hw.mac.type) {
575 case ixgbe_mac_82598EB:
576 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
577 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
578 break;
579 case ixgbe_mac_82599EB:
580 case ixgbe_mac_X540:
581 mask = (qmask & 0xFFFFFFFF);
582 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
583 mask = (qmask >> 32);
584 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
585 break;
586 default:
587 break;
588 }
589 }
590
591 void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *ring,
592 struct ixgbe_tx_buffer *tx_buffer)
593 {
594 if (tx_buffer->skb) {
595 dev_kfree_skb_any(tx_buffer->skb);
596 if (dma_unmap_len(tx_buffer, len))
597 dma_unmap_single(ring->dev,
598 dma_unmap_addr(tx_buffer, dma),
599 dma_unmap_len(tx_buffer, len),
600 DMA_TO_DEVICE);
601 } else if (dma_unmap_len(tx_buffer, len)) {
602 dma_unmap_page(ring->dev,
603 dma_unmap_addr(tx_buffer, dma),
604 dma_unmap_len(tx_buffer, len),
605 DMA_TO_DEVICE);
606 }
607 tx_buffer->next_to_watch = NULL;
608 tx_buffer->skb = NULL;
609 dma_unmap_len_set(tx_buffer, len, 0);
610 /* tx_buffer must be completely set up in the transmit path */
611 }
612
613 static void ixgbe_update_xoff_rx_lfc(struct ixgbe_adapter *adapter)
614 {
615 struct ixgbe_hw *hw = &adapter->hw;
616 struct ixgbe_hw_stats *hwstats = &adapter->stats;
617 int i;
618 u32 data;
619
620 if ((hw->fc.current_mode != ixgbe_fc_full) &&
621 (hw->fc.current_mode != ixgbe_fc_rx_pause))
622 return;
623
624 switch (hw->mac.type) {
625 case ixgbe_mac_82598EB:
626 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
627 break;
628 default:
629 data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
630 }
631 hwstats->lxoffrxc += data;
632
633 /* refill credits (no tx hang) if we received xoff */
634 if (!data)
635 return;
636
637 for (i = 0; i < adapter->num_tx_queues; i++)
638 clear_bit(__IXGBE_HANG_CHECK_ARMED,
639 &adapter->tx_ring[i]->state);
640 }
641
642 static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter)
643 {
644 struct ixgbe_hw *hw = &adapter->hw;
645 struct ixgbe_hw_stats *hwstats = &adapter->stats;
646 u32 xoff[8] = {0};
647 int i;
648 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
649
650 if (adapter->ixgbe_ieee_pfc)
651 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
652
653 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED) || !pfc_en) {
654 ixgbe_update_xoff_rx_lfc(adapter);
655 return;
656 }
657
658 /* update stats for each tc, only valid with PFC enabled */
659 for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) {
660 switch (hw->mac.type) {
661 case ixgbe_mac_82598EB:
662 xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
663 break;
664 default:
665 xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
666 }
667 hwstats->pxoffrxc[i] += xoff[i];
668 }
669
670 /* disarm tx queues that have received xoff frames */
671 for (i = 0; i < adapter->num_tx_queues; i++) {
672 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
673 u8 tc = tx_ring->dcb_tc;
674
675 if (xoff[tc])
676 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
677 }
678 }
679
680 static u64 ixgbe_get_tx_completed(struct ixgbe_ring *ring)
681 {
682 return ring->stats.packets;
683 }
684
685 static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring)
686 {
687 struct ixgbe_adapter *adapter = netdev_priv(ring->netdev);
688 struct ixgbe_hw *hw = &adapter->hw;
689
690 u32 head = IXGBE_READ_REG(hw, IXGBE_TDH(ring->reg_idx));
691 u32 tail = IXGBE_READ_REG(hw, IXGBE_TDT(ring->reg_idx));
692
693 if (head != tail)
694 return (head < tail) ?
695 tail - head : (tail + ring->count - head);
696
697 return 0;
698 }
699
700 static inline bool ixgbe_check_tx_hang(struct ixgbe_ring *tx_ring)
701 {
702 u32 tx_done = ixgbe_get_tx_completed(tx_ring);
703 u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
704 u32 tx_pending = ixgbe_get_tx_pending(tx_ring);
705 bool ret = false;
706
707 clear_check_for_tx_hang(tx_ring);
708
709 /*
710 * Check for a hung queue, but be thorough. This verifies
711 * that a transmit has been completed since the previous
712 * check AND there is at least one packet pending. The
713 * ARMED bit is set to indicate a potential hang. The
714 * bit is cleared if a pause frame is received to remove
715 * false hang detection due to PFC or 802.3x frames. By
716 * requiring this to fail twice we avoid races with
717 * pfc clearing the ARMED bit and conditions where we
718 * run the check_tx_hang logic with a transmit completion
719 * pending but without time to complete it yet.
720 */
721 if ((tx_done_old == tx_done) && tx_pending) {
722 /* make sure it is true for two checks in a row */
723 ret = test_and_set_bit(__IXGBE_HANG_CHECK_ARMED,
724 &tx_ring->state);
725 } else {
726 /* update completed stats and continue */
727 tx_ring->tx_stats.tx_done_old = tx_done;
728 /* reset the countdown */
729 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
730 }
731
732 return ret;
733 }
734
735 /**
736 * ixgbe_tx_timeout_reset - initiate reset due to Tx timeout
737 * @adapter: driver private struct
738 **/
739 static void ixgbe_tx_timeout_reset(struct ixgbe_adapter *adapter)
740 {
741
742 /* Do the reset outside of interrupt context */
743 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
744 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
745 ixgbe_service_event_schedule(adapter);
746 }
747 }
748
749 /**
750 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
751 * @q_vector: structure containing interrupt and ring information
752 * @tx_ring: tx ring to clean
753 **/
754 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
755 struct ixgbe_ring *tx_ring)
756 {
757 struct ixgbe_adapter *adapter = q_vector->adapter;
758 struct ixgbe_tx_buffer *tx_buffer;
759 union ixgbe_adv_tx_desc *tx_desc;
760 unsigned int total_bytes = 0, total_packets = 0;
761 unsigned int budget = q_vector->tx.work_limit;
762 unsigned int i = tx_ring->next_to_clean;
763
764 if (test_bit(__IXGBE_DOWN, &adapter->state))
765 return true;
766
767 tx_buffer = &tx_ring->tx_buffer_info[i];
768 tx_desc = IXGBE_TX_DESC(tx_ring, i);
769 i -= tx_ring->count;
770
771 do {
772 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
773
774 /* if next_to_watch is not set then there is no work pending */
775 if (!eop_desc)
776 break;
777
778 /* prevent any other reads prior to eop_desc */
779 rmb();
780
781 /* if DD is not set pending work has not been completed */
782 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
783 break;
784
785 /* clear next_to_watch to prevent false hangs */
786 tx_buffer->next_to_watch = NULL;
787
788 /* update the statistics for this packet */
789 total_bytes += tx_buffer->bytecount;
790 total_packets += tx_buffer->gso_segs;
791
792 #ifdef CONFIG_IXGBE_PTP
793 if (unlikely(tx_buffer->tx_flags &
794 IXGBE_TX_FLAGS_TSTAMP))
795 ixgbe_ptp_tx_hwtstamp(q_vector,
796 tx_buffer->skb);
797
798 #endif
799 /* free the skb */
800 dev_kfree_skb_any(tx_buffer->skb);
801
802 /* unmap skb header data */
803 dma_unmap_single(tx_ring->dev,
804 dma_unmap_addr(tx_buffer, dma),
805 dma_unmap_len(tx_buffer, len),
806 DMA_TO_DEVICE);
807
808 /* clear tx_buffer data */
809 tx_buffer->skb = NULL;
810 dma_unmap_len_set(tx_buffer, len, 0);
811
812 /* unmap remaining buffers */
813 while (tx_desc != eop_desc) {
814 tx_buffer++;
815 tx_desc++;
816 i++;
817 if (unlikely(!i)) {
818 i -= tx_ring->count;
819 tx_buffer = tx_ring->tx_buffer_info;
820 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
821 }
822
823 /* unmap any remaining paged data */
824 if (dma_unmap_len(tx_buffer, len)) {
825 dma_unmap_page(tx_ring->dev,
826 dma_unmap_addr(tx_buffer, dma),
827 dma_unmap_len(tx_buffer, len),
828 DMA_TO_DEVICE);
829 dma_unmap_len_set(tx_buffer, len, 0);
830 }
831 }
832
833 /* move us one more past the eop_desc for start of next pkt */
834 tx_buffer++;
835 tx_desc++;
836 i++;
837 if (unlikely(!i)) {
838 i -= tx_ring->count;
839 tx_buffer = tx_ring->tx_buffer_info;
840 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
841 }
842
843 /* issue prefetch for next Tx descriptor */
844 prefetch(tx_desc);
845
846 /* update budget accounting */
847 budget--;
848 } while (likely(budget));
849
850 i += tx_ring->count;
851 tx_ring->next_to_clean = i;
852 u64_stats_update_begin(&tx_ring->syncp);
853 tx_ring->stats.bytes += total_bytes;
854 tx_ring->stats.packets += total_packets;
855 u64_stats_update_end(&tx_ring->syncp);
856 q_vector->tx.total_bytes += total_bytes;
857 q_vector->tx.total_packets += total_packets;
858
859 if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring)) {
860 /* schedule immediate reset if we believe we hung */
861 struct ixgbe_hw *hw = &adapter->hw;
862 e_err(drv, "Detected Tx Unit Hang\n"
863 " Tx Queue <%d>\n"
864 " TDH, TDT <%x>, <%x>\n"
865 " next_to_use <%x>\n"
866 " next_to_clean <%x>\n"
867 "tx_buffer_info[next_to_clean]\n"
868 " time_stamp <%lx>\n"
869 " jiffies <%lx>\n",
870 tx_ring->queue_index,
871 IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)),
872 IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)),
873 tx_ring->next_to_use, i,
874 tx_ring->tx_buffer_info[i].time_stamp, jiffies);
875
876 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
877
878 e_info(probe,
879 "tx hang %d detected on queue %d, resetting adapter\n",
880 adapter->tx_timeout_count + 1, tx_ring->queue_index);
881
882 /* schedule immediate reset if we believe we hung */
883 ixgbe_tx_timeout_reset(adapter);
884
885 /* the adapter is about to reset, no point in enabling stuff */
886 return true;
887 }
888
889 netdev_tx_completed_queue(txring_txq(tx_ring),
890 total_packets, total_bytes);
891
892 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
893 if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
894 (ixgbe_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
895 /* Make sure that anybody stopping the queue after this
896 * sees the new next_to_clean.
897 */
898 smp_mb();
899 if (__netif_subqueue_stopped(tx_ring->netdev,
900 tx_ring->queue_index)
901 && !test_bit(__IXGBE_DOWN, &adapter->state)) {
902 netif_wake_subqueue(tx_ring->netdev,
903 tx_ring->queue_index);
904 ++tx_ring->tx_stats.restart_queue;
905 }
906 }
907
908 return !!budget;
909 }
910
911 #ifdef CONFIG_IXGBE_DCA
912 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
913 struct ixgbe_ring *tx_ring,
914 int cpu)
915 {
916 struct ixgbe_hw *hw = &adapter->hw;
917 u32 txctrl = dca3_get_tag(tx_ring->dev, cpu);
918 u16 reg_offset;
919
920 switch (hw->mac.type) {
921 case ixgbe_mac_82598EB:
922 reg_offset = IXGBE_DCA_TXCTRL(tx_ring->reg_idx);
923 break;
924 case ixgbe_mac_82599EB:
925 case ixgbe_mac_X540:
926 reg_offset = IXGBE_DCA_TXCTRL_82599(tx_ring->reg_idx);
927 txctrl <<= IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599;
928 break;
929 default:
930 /* for unknown hardware do not write register */
931 return;
932 }
933
934 /*
935 * We can enable relaxed ordering for reads, but not writes when
936 * DCA is enabled. This is due to a known issue in some chipsets
937 * which will cause the DCA tag to be cleared.
938 */
939 txctrl |= IXGBE_DCA_TXCTRL_DESC_RRO_EN |
940 IXGBE_DCA_TXCTRL_DATA_RRO_EN |
941 IXGBE_DCA_TXCTRL_DESC_DCA_EN;
942
943 IXGBE_WRITE_REG(hw, reg_offset, txctrl);
944 }
945
946 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
947 struct ixgbe_ring *rx_ring,
948 int cpu)
949 {
950 struct ixgbe_hw *hw = &adapter->hw;
951 u32 rxctrl = dca3_get_tag(rx_ring->dev, cpu);
952 u8 reg_idx = rx_ring->reg_idx;
953
954
955 switch (hw->mac.type) {
956 case ixgbe_mac_82599EB:
957 case ixgbe_mac_X540:
958 rxctrl <<= IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599;
959 break;
960 default:
961 break;
962 }
963
964 /*
965 * We can enable relaxed ordering for reads, but not writes when
966 * DCA is enabled. This is due to a known issue in some chipsets
967 * which will cause the DCA tag to be cleared.
968 */
969 rxctrl |= IXGBE_DCA_RXCTRL_DESC_RRO_EN |
970 IXGBE_DCA_RXCTRL_DATA_DCA_EN |
971 IXGBE_DCA_RXCTRL_DESC_DCA_EN;
972
973 IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl);
974 }
975
976 static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
977 {
978 struct ixgbe_adapter *adapter = q_vector->adapter;
979 struct ixgbe_ring *ring;
980 int cpu = get_cpu();
981
982 if (q_vector->cpu == cpu)
983 goto out_no_update;
984
985 ixgbe_for_each_ring(ring, q_vector->tx)
986 ixgbe_update_tx_dca(adapter, ring, cpu);
987
988 ixgbe_for_each_ring(ring, q_vector->rx)
989 ixgbe_update_rx_dca(adapter, ring, cpu);
990
991 q_vector->cpu = cpu;
992 out_no_update:
993 put_cpu();
994 }
995
996 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
997 {
998 int num_q_vectors;
999 int i;
1000
1001 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
1002 return;
1003
1004 /* always use CB2 mode, difference is masked in the CB driver */
1005 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
1006
1007 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
1008 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1009 else
1010 num_q_vectors = 1;
1011
1012 for (i = 0; i < num_q_vectors; i++) {
1013 adapter->q_vector[i]->cpu = -1;
1014 ixgbe_update_dca(adapter->q_vector[i]);
1015 }
1016 }
1017
1018 static int __ixgbe_notify_dca(struct device *dev, void *data)
1019 {
1020 struct ixgbe_adapter *adapter = dev_get_drvdata(dev);
1021 unsigned long event = *(unsigned long *)data;
1022
1023 if (!(adapter->flags & IXGBE_FLAG_DCA_CAPABLE))
1024 return 0;
1025
1026 switch (event) {
1027 case DCA_PROVIDER_ADD:
1028 /* if we're already enabled, don't do it again */
1029 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1030 break;
1031 if (dca_add_requester(dev) == 0) {
1032 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
1033 ixgbe_setup_dca(adapter);
1034 break;
1035 }
1036 /* Fall Through since DCA is disabled. */
1037 case DCA_PROVIDER_REMOVE:
1038 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
1039 dca_remove_requester(dev);
1040 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
1041 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
1042 }
1043 break;
1044 }
1045
1046 return 0;
1047 }
1048
1049 #endif /* CONFIG_IXGBE_DCA */
1050 static inline void ixgbe_rx_hash(struct ixgbe_ring *ring,
1051 union ixgbe_adv_rx_desc *rx_desc,
1052 struct sk_buff *skb)
1053 {
1054 if (ring->netdev->features & NETIF_F_RXHASH)
1055 skb->rxhash = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
1056 }
1057
1058 #ifdef IXGBE_FCOE
1059 /**
1060 * ixgbe_rx_is_fcoe - check the rx desc for incoming pkt type
1061 * @adapter: address of board private structure
1062 * @rx_desc: advanced rx descriptor
1063 *
1064 * Returns : true if it is FCoE pkt
1065 */
1066 static inline bool ixgbe_rx_is_fcoe(struct ixgbe_adapter *adapter,
1067 union ixgbe_adv_rx_desc *rx_desc)
1068 {
1069 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1070
1071 return (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
1072 ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_ETQF_MASK)) ==
1073 (cpu_to_le16(IXGBE_ETQF_FILTER_FCOE <<
1074 IXGBE_RXDADV_PKTTYPE_ETQF_SHIFT)));
1075 }
1076
1077 #endif /* IXGBE_FCOE */
1078 /**
1079 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
1080 * @ring: structure containing ring specific data
1081 * @rx_desc: current Rx descriptor being processed
1082 * @skb: skb currently being received and modified
1083 **/
1084 static inline void ixgbe_rx_checksum(struct ixgbe_ring *ring,
1085 union ixgbe_adv_rx_desc *rx_desc,
1086 struct sk_buff *skb)
1087 {
1088 skb_checksum_none_assert(skb);
1089
1090 /* Rx csum disabled */
1091 if (!(ring->netdev->features & NETIF_F_RXCSUM))
1092 return;
1093
1094 /* if IP and error */
1095 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
1096 ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
1097 ring->rx_stats.csum_err++;
1098 return;
1099 }
1100
1101 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
1102 return;
1103
1104 if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
1105 __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1106
1107 /*
1108 * 82599 errata, UDP frames with a 0 checksum can be marked as
1109 * checksum errors.
1110 */
1111 if ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_UDP)) &&
1112 test_bit(__IXGBE_RX_CSUM_UDP_ZERO_ERR, &ring->state))
1113 return;
1114
1115 ring->rx_stats.csum_err++;
1116 return;
1117 }
1118
1119 /* It must be a TCP or UDP packet with a valid checksum */
1120 skb->ip_summed = CHECKSUM_UNNECESSARY;
1121 }
1122
1123 static inline void ixgbe_release_rx_desc(struct ixgbe_ring *rx_ring, u32 val)
1124 {
1125 rx_ring->next_to_use = val;
1126
1127 /* update next to alloc since we have filled the ring */
1128 rx_ring->next_to_alloc = val;
1129 /*
1130 * Force memory writes to complete before letting h/w
1131 * know there are new descriptors to fetch. (Only
1132 * applicable for weak-ordered memory model archs,
1133 * such as IA-64).
1134 */
1135 wmb();
1136 writel(val, rx_ring->tail);
1137 }
1138
1139 static bool ixgbe_alloc_mapped_page(struct ixgbe_ring *rx_ring,
1140 struct ixgbe_rx_buffer *bi)
1141 {
1142 struct page *page = bi->page;
1143 dma_addr_t dma = bi->dma;
1144
1145 /* since we are recycling buffers we should seldom need to alloc */
1146 if (likely(dma))
1147 return true;
1148
1149 /* alloc new page for storage */
1150 if (likely(!page)) {
1151 page = alloc_pages(GFP_ATOMIC | __GFP_COLD,
1152 ixgbe_rx_pg_order(rx_ring));
1153 if (unlikely(!page)) {
1154 rx_ring->rx_stats.alloc_rx_page_failed++;
1155 return false;
1156 }
1157 bi->page = page;
1158 }
1159
1160 /* map page for use */
1161 dma = dma_map_page(rx_ring->dev, page, 0,
1162 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
1163
1164 /*
1165 * if mapping failed free memory back to system since
1166 * there isn't much point in holding memory we can't use
1167 */
1168 if (dma_mapping_error(rx_ring->dev, dma)) {
1169 __free_pages(page, ixgbe_rx_pg_order(rx_ring));
1170 bi->page = NULL;
1171
1172 rx_ring->rx_stats.alloc_rx_page_failed++;
1173 return false;
1174 }
1175
1176 bi->dma = dma;
1177 bi->page_offset ^= ixgbe_rx_bufsz(rx_ring);
1178
1179 return true;
1180 }
1181
1182 /**
1183 * ixgbe_alloc_rx_buffers - Replace used receive buffers
1184 * @rx_ring: ring to place buffers on
1185 * @cleaned_count: number of buffers to replace
1186 **/
1187 void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count)
1188 {
1189 union ixgbe_adv_rx_desc *rx_desc;
1190 struct ixgbe_rx_buffer *bi;
1191 u16 i = rx_ring->next_to_use;
1192
1193 /* nothing to do */
1194 if (!cleaned_count)
1195 return;
1196
1197 rx_desc = IXGBE_RX_DESC(rx_ring, i);
1198 bi = &rx_ring->rx_buffer_info[i];
1199 i -= rx_ring->count;
1200
1201 do {
1202 if (!ixgbe_alloc_mapped_page(rx_ring, bi))
1203 break;
1204
1205 /*
1206 * Refresh the desc even if buffer_addrs didn't change
1207 * because each write-back erases this info.
1208 */
1209 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
1210
1211 rx_desc++;
1212 bi++;
1213 i++;
1214 if (unlikely(!i)) {
1215 rx_desc = IXGBE_RX_DESC(rx_ring, 0);
1216 bi = rx_ring->rx_buffer_info;
1217 i -= rx_ring->count;
1218 }
1219
1220 /* clear the hdr_addr for the next_to_use descriptor */
1221 rx_desc->read.hdr_addr = 0;
1222
1223 cleaned_count--;
1224 } while (cleaned_count);
1225
1226 i += rx_ring->count;
1227
1228 if (rx_ring->next_to_use != i)
1229 ixgbe_release_rx_desc(rx_ring, i);
1230 }
1231
1232 /**
1233 * ixgbe_get_headlen - determine size of header for RSC/LRO/GRO/FCOE
1234 * @data: pointer to the start of the headers
1235 * @max_len: total length of section to find headers in
1236 *
1237 * This function is meant to determine the length of headers that will
1238 * be recognized by hardware for LRO, GRO, and RSC offloads. The main
1239 * motivation of doing this is to only perform one pull for IPv4 TCP
1240 * packets so that we can do basic things like calculating the gso_size
1241 * based on the average data per packet.
1242 **/
1243 static unsigned int ixgbe_get_headlen(unsigned char *data,
1244 unsigned int max_len)
1245 {
1246 union {
1247 unsigned char *network;
1248 /* l2 headers */
1249 struct ethhdr *eth;
1250 struct vlan_hdr *vlan;
1251 /* l3 headers */
1252 struct iphdr *ipv4;
1253 } hdr;
1254 __be16 protocol;
1255 u8 nexthdr = 0; /* default to not TCP */
1256 u8 hlen;
1257
1258 /* this should never happen, but better safe than sorry */
1259 if (max_len < ETH_HLEN)
1260 return max_len;
1261
1262 /* initialize network frame pointer */
1263 hdr.network = data;
1264
1265 /* set first protocol and move network header forward */
1266 protocol = hdr.eth->h_proto;
1267 hdr.network += ETH_HLEN;
1268
1269 /* handle any vlan tag if present */
1270 if (protocol == __constant_htons(ETH_P_8021Q)) {
1271 if ((hdr.network - data) > (max_len - VLAN_HLEN))
1272 return max_len;
1273
1274 protocol = hdr.vlan->h_vlan_encapsulated_proto;
1275 hdr.network += VLAN_HLEN;
1276 }
1277
1278 /* handle L3 protocols */
1279 if (protocol == __constant_htons(ETH_P_IP)) {
1280 if ((hdr.network - data) > (max_len - sizeof(struct iphdr)))
1281 return max_len;
1282
1283 /* access ihl as a u8 to avoid unaligned access on ia64 */
1284 hlen = (hdr.network[0] & 0x0F) << 2;
1285
1286 /* verify hlen meets minimum size requirements */
1287 if (hlen < sizeof(struct iphdr))
1288 return hdr.network - data;
1289
1290 /* record next protocol */
1291 nexthdr = hdr.ipv4->protocol;
1292 hdr.network += hlen;
1293 #ifdef IXGBE_FCOE
1294 } else if (protocol == __constant_htons(ETH_P_FCOE)) {
1295 if ((hdr.network - data) > (max_len - FCOE_HEADER_LEN))
1296 return max_len;
1297 hdr.network += FCOE_HEADER_LEN;
1298 #endif
1299 } else {
1300 return hdr.network - data;
1301 }
1302
1303 /* finally sort out TCP */
1304 if (nexthdr == IPPROTO_TCP) {
1305 if ((hdr.network - data) > (max_len - sizeof(struct tcphdr)))
1306 return max_len;
1307
1308 /* access doff as a u8 to avoid unaligned access on ia64 */
1309 hlen = (hdr.network[12] & 0xF0) >> 2;
1310
1311 /* verify hlen meets minimum size requirements */
1312 if (hlen < sizeof(struct tcphdr))
1313 return hdr.network - data;
1314
1315 hdr.network += hlen;
1316 }
1317
1318 /*
1319 * If everything has gone correctly hdr.network should be the
1320 * data section of the packet and will be the end of the header.
1321 * If not then it probably represents the end of the last recognized
1322 * header.
1323 */
1324 if ((hdr.network - data) < max_len)
1325 return hdr.network - data;
1326 else
1327 return max_len;
1328 }
1329
1330 static void ixgbe_get_rsc_cnt(struct ixgbe_ring *rx_ring,
1331 union ixgbe_adv_rx_desc *rx_desc,
1332 struct sk_buff *skb)
1333 {
1334 __le32 rsc_enabled;
1335 u32 rsc_cnt;
1336
1337 if (!ring_is_rsc_enabled(rx_ring))
1338 return;
1339
1340 rsc_enabled = rx_desc->wb.lower.lo_dword.data &
1341 cpu_to_le32(IXGBE_RXDADV_RSCCNT_MASK);
1342
1343 /* If this is an RSC frame rsc_cnt should be non-zero */
1344 if (!rsc_enabled)
1345 return;
1346
1347 rsc_cnt = le32_to_cpu(rsc_enabled);
1348 rsc_cnt >>= IXGBE_RXDADV_RSCCNT_SHIFT;
1349
1350 IXGBE_CB(skb)->append_cnt += rsc_cnt - 1;
1351 }
1352
1353 static void ixgbe_set_rsc_gso_size(struct ixgbe_ring *ring,
1354 struct sk_buff *skb)
1355 {
1356 u16 hdr_len = skb_headlen(skb);
1357
1358 /* set gso_size to avoid messing up TCP MSS */
1359 skb_shinfo(skb)->gso_size = DIV_ROUND_UP((skb->len - hdr_len),
1360 IXGBE_CB(skb)->append_cnt);
1361 }
1362
1363 static void ixgbe_update_rsc_stats(struct ixgbe_ring *rx_ring,
1364 struct sk_buff *skb)
1365 {
1366 /* if append_cnt is 0 then frame is not RSC */
1367 if (!IXGBE_CB(skb)->append_cnt)
1368 return;
1369
1370 rx_ring->rx_stats.rsc_count += IXGBE_CB(skb)->append_cnt;
1371 rx_ring->rx_stats.rsc_flush++;
1372
1373 ixgbe_set_rsc_gso_size(rx_ring, skb);
1374
1375 /* gso_size is computed using append_cnt so always clear it last */
1376 IXGBE_CB(skb)->append_cnt = 0;
1377 }
1378
1379 /**
1380 * ixgbe_process_skb_fields - Populate skb header fields from Rx descriptor
1381 * @rx_ring: rx descriptor ring packet is being transacted on
1382 * @rx_desc: pointer to the EOP Rx descriptor
1383 * @skb: pointer to current skb being populated
1384 *
1385 * This function checks the ring, descriptor, and packet information in
1386 * order to populate the hash, checksum, VLAN, timestamp, protocol, and
1387 * other fields within the skb.
1388 **/
1389 static void ixgbe_process_skb_fields(struct ixgbe_ring *rx_ring,
1390 union ixgbe_adv_rx_desc *rx_desc,
1391 struct sk_buff *skb)
1392 {
1393 ixgbe_update_rsc_stats(rx_ring, skb);
1394
1395 ixgbe_rx_hash(rx_ring, rx_desc, skb);
1396
1397 ixgbe_rx_checksum(rx_ring, rx_desc, skb);
1398
1399 #ifdef CONFIG_IXGBE_PTP
1400 if (ixgbe_test_staterr(rx_desc, IXGBE_RXDADV_STAT_TS))
1401 ixgbe_ptp_rx_hwtstamp(rx_ring->q_vector, skb);
1402 #endif
1403
1404 if (ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
1405 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
1406 __vlan_hwaccel_put_tag(skb, vid);
1407 }
1408
1409 skb_record_rx_queue(skb, rx_ring->queue_index);
1410
1411 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
1412 }
1413
1414 static void ixgbe_rx_skb(struct ixgbe_q_vector *q_vector,
1415 struct sk_buff *skb)
1416 {
1417 struct ixgbe_adapter *adapter = q_vector->adapter;
1418
1419 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
1420 napi_gro_receive(&q_vector->napi, skb);
1421 else
1422 netif_rx(skb);
1423 }
1424
1425 /**
1426 * ixgbe_is_non_eop - process handling of non-EOP buffers
1427 * @rx_ring: Rx ring being processed
1428 * @rx_desc: Rx descriptor for current buffer
1429 * @skb: Current socket buffer containing buffer in progress
1430 *
1431 * This function updates next to clean. If the buffer is an EOP buffer
1432 * this function exits returning false, otherwise it will place the
1433 * sk_buff in the next buffer to be chained and return true indicating
1434 * that this is in fact a non-EOP buffer.
1435 **/
1436 static bool ixgbe_is_non_eop(struct ixgbe_ring *rx_ring,
1437 union ixgbe_adv_rx_desc *rx_desc,
1438 struct sk_buff *skb)
1439 {
1440 u32 ntc = rx_ring->next_to_clean + 1;
1441
1442 /* fetch, update, and store next to clean */
1443 ntc = (ntc < rx_ring->count) ? ntc : 0;
1444 rx_ring->next_to_clean = ntc;
1445
1446 prefetch(IXGBE_RX_DESC(rx_ring, ntc));
1447
1448 if (likely(ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
1449 return false;
1450
1451 /* append_cnt indicates packet is RSC, if so fetch nextp */
1452 if (IXGBE_CB(skb)->append_cnt) {
1453 ntc = le32_to_cpu(rx_desc->wb.upper.status_error);
1454 ntc &= IXGBE_RXDADV_NEXTP_MASK;
1455 ntc >>= IXGBE_RXDADV_NEXTP_SHIFT;
1456 }
1457
1458 /* place skb in next buffer to be received */
1459 rx_ring->rx_buffer_info[ntc].skb = skb;
1460 rx_ring->rx_stats.non_eop_descs++;
1461
1462 return true;
1463 }
1464
1465 /**
1466 * ixgbe_cleanup_headers - Correct corrupted or empty headers
1467 * @rx_ring: rx descriptor ring packet is being transacted on
1468 * @rx_desc: pointer to the EOP Rx descriptor
1469 * @skb: pointer to current skb being fixed
1470 *
1471 * Check for corrupted packet headers caused by senders on the local L2
1472 * embedded NIC switch not setting up their Tx Descriptors right. These
1473 * should be very rare.
1474 *
1475 * Also address the case where we are pulling data in on pages only
1476 * and as such no data is present in the skb header.
1477 *
1478 * In addition if skb is not at least 60 bytes we need to pad it so that
1479 * it is large enough to qualify as a valid Ethernet frame.
1480 *
1481 * Returns true if an error was encountered and skb was freed.
1482 **/
1483 static bool ixgbe_cleanup_headers(struct ixgbe_ring *rx_ring,
1484 union ixgbe_adv_rx_desc *rx_desc,
1485 struct sk_buff *skb)
1486 {
1487 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
1488 struct net_device *netdev = rx_ring->netdev;
1489 unsigned char *va;
1490 unsigned int pull_len;
1491
1492 /* if the page was released unmap it, else just sync our portion */
1493 if (unlikely(IXGBE_CB(skb)->page_released)) {
1494 dma_unmap_page(rx_ring->dev, IXGBE_CB(skb)->dma,
1495 ixgbe_rx_pg_size(rx_ring), DMA_FROM_DEVICE);
1496 IXGBE_CB(skb)->page_released = false;
1497 } else {
1498 dma_sync_single_range_for_cpu(rx_ring->dev,
1499 IXGBE_CB(skb)->dma,
1500 frag->page_offset,
1501 ixgbe_rx_bufsz(rx_ring),
1502 DMA_FROM_DEVICE);
1503 }
1504 IXGBE_CB(skb)->dma = 0;
1505
1506 /* verify that the packet does not have any known errors */
1507 if (unlikely(ixgbe_test_staterr(rx_desc,
1508 IXGBE_RXDADV_ERR_FRAME_ERR_MASK) &&
1509 !(netdev->features & NETIF_F_RXALL))) {
1510 dev_kfree_skb_any(skb);
1511 return true;
1512 }
1513
1514 /*
1515 * it is valid to use page_address instead of kmap since we are
1516 * working with pages allocated out of the lomem pool per
1517 * alloc_page(GFP_ATOMIC)
1518 */
1519 va = skb_frag_address(frag);
1520
1521 /*
1522 * we need the header to contain the greater of either ETH_HLEN or
1523 * 60 bytes if the skb->len is less than 60 for skb_pad.
1524 */
1525 pull_len = skb_frag_size(frag);
1526 if (pull_len > 256)
1527 pull_len = ixgbe_get_headlen(va, pull_len);
1528
1529 /* align pull length to size of long to optimize memcpy performance */
1530 skb_copy_to_linear_data(skb, va, ALIGN(pull_len, sizeof(long)));
1531
1532 /* update all of the pointers */
1533 skb_frag_size_sub(frag, pull_len);
1534 frag->page_offset += pull_len;
1535 skb->data_len -= pull_len;
1536 skb->tail += pull_len;
1537
1538 /*
1539 * if we sucked the frag empty then we should free it,
1540 * if there are other frags here something is screwed up in hardware
1541 */
1542 if (skb_frag_size(frag) == 0) {
1543 BUG_ON(skb_shinfo(skb)->nr_frags != 1);
1544 skb_shinfo(skb)->nr_frags = 0;
1545 __skb_frag_unref(frag);
1546 skb->truesize -= ixgbe_rx_bufsz(rx_ring);
1547 }
1548
1549 /* if skb_pad returns an error the skb was freed */
1550 if (unlikely(skb->len < 60)) {
1551 int pad_len = 60 - skb->len;
1552
1553 if (skb_pad(skb, pad_len))
1554 return true;
1555 __skb_put(skb, pad_len);
1556 }
1557
1558 return false;
1559 }
1560
1561 /**
1562 * ixgbe_can_reuse_page - determine if we can reuse a page
1563 * @rx_buffer: pointer to rx_buffer containing the page we want to reuse
1564 *
1565 * Returns true if page can be reused in another Rx buffer
1566 **/
1567 static inline bool ixgbe_can_reuse_page(struct ixgbe_rx_buffer *rx_buffer)
1568 {
1569 struct page *page = rx_buffer->page;
1570
1571 /* if we are only owner of page and it is local we can reuse it */
1572 return likely(page_count(page) == 1) &&
1573 likely(page_to_nid(page) == numa_node_id());
1574 }
1575
1576 /**
1577 * ixgbe_reuse_rx_page - page flip buffer and store it back on the ring
1578 * @rx_ring: rx descriptor ring to store buffers on
1579 * @old_buff: donor buffer to have page reused
1580 *
1581 * Syncronizes page for reuse by the adapter
1582 **/
1583 static void ixgbe_reuse_rx_page(struct ixgbe_ring *rx_ring,
1584 struct ixgbe_rx_buffer *old_buff)
1585 {
1586 struct ixgbe_rx_buffer *new_buff;
1587 u16 nta = rx_ring->next_to_alloc;
1588 u16 bufsz = ixgbe_rx_bufsz(rx_ring);
1589
1590 new_buff = &rx_ring->rx_buffer_info[nta];
1591
1592 /* update, and store next to alloc */
1593 nta++;
1594 rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
1595
1596 /* transfer page from old buffer to new buffer */
1597 new_buff->page = old_buff->page;
1598 new_buff->dma = old_buff->dma;
1599
1600 /* flip page offset to other buffer and store to new_buff */
1601 new_buff->page_offset = old_buff->page_offset ^ bufsz;
1602
1603 /* sync the buffer for use by the device */
1604 dma_sync_single_range_for_device(rx_ring->dev, new_buff->dma,
1605 new_buff->page_offset, bufsz,
1606 DMA_FROM_DEVICE);
1607
1608 /* bump ref count on page before it is given to the stack */
1609 get_page(new_buff->page);
1610 }
1611
1612 /**
1613 * ixgbe_add_rx_frag - Add contents of Rx buffer to sk_buff
1614 * @rx_ring: rx descriptor ring to transact packets on
1615 * @rx_buffer: buffer containing page to add
1616 * @rx_desc: descriptor containing length of buffer written by hardware
1617 * @skb: sk_buff to place the data into
1618 *
1619 * This function is based on skb_add_rx_frag. I would have used that
1620 * function however it doesn't handle the truesize case correctly since we
1621 * are allocating more memory than might be used for a single receive.
1622 **/
1623 static void ixgbe_add_rx_frag(struct ixgbe_ring *rx_ring,
1624 struct ixgbe_rx_buffer *rx_buffer,
1625 struct sk_buff *skb, int size)
1626 {
1627 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
1628 rx_buffer->page, rx_buffer->page_offset,
1629 size);
1630 skb->len += size;
1631 skb->data_len += size;
1632 skb->truesize += ixgbe_rx_bufsz(rx_ring);
1633 }
1634
1635 /**
1636 * ixgbe_clean_rx_irq - Clean completed descriptors from Rx ring - bounce buf
1637 * @q_vector: structure containing interrupt and ring information
1638 * @rx_ring: rx descriptor ring to transact packets on
1639 * @budget: Total limit on number of packets to process
1640 *
1641 * This function provides a "bounce buffer" approach to Rx interrupt
1642 * processing. The advantage to this is that on systems that have
1643 * expensive overhead for IOMMU access this provides a means of avoiding
1644 * it by maintaining the mapping of the page to the syste.
1645 *
1646 * Returns true if all work is completed without reaching budget
1647 **/
1648 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
1649 struct ixgbe_ring *rx_ring,
1650 int budget)
1651 {
1652 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1653 #ifdef IXGBE_FCOE
1654 struct ixgbe_adapter *adapter = q_vector->adapter;
1655 int ddp_bytes = 0;
1656 #endif /* IXGBE_FCOE */
1657 u16 cleaned_count = ixgbe_desc_unused(rx_ring);
1658
1659 do {
1660 struct ixgbe_rx_buffer *rx_buffer;
1661 union ixgbe_adv_rx_desc *rx_desc;
1662 struct sk_buff *skb;
1663 struct page *page;
1664 u16 ntc;
1665
1666 /* return some buffers to hardware, one at a time is too slow */
1667 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
1668 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1669 cleaned_count = 0;
1670 }
1671
1672 ntc = rx_ring->next_to_clean;
1673 rx_desc = IXGBE_RX_DESC(rx_ring, ntc);
1674 rx_buffer = &rx_ring->rx_buffer_info[ntc];
1675
1676 if (!ixgbe_test_staterr(rx_desc, IXGBE_RXD_STAT_DD))
1677 break;
1678
1679 /*
1680 * This memory barrier is needed to keep us from reading
1681 * any other fields out of the rx_desc until we know the
1682 * RXD_STAT_DD bit is set
1683 */
1684 rmb();
1685
1686 page = rx_buffer->page;
1687 prefetchw(page);
1688
1689 skb = rx_buffer->skb;
1690
1691 if (likely(!skb)) {
1692 void *page_addr = page_address(page) +
1693 rx_buffer->page_offset;
1694
1695 /* prefetch first cache line of first page */
1696 prefetch(page_addr);
1697 #if L1_CACHE_BYTES < 128
1698 prefetch(page_addr + L1_CACHE_BYTES);
1699 #endif
1700
1701 /* allocate a skb to store the frags */
1702 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
1703 IXGBE_RX_HDR_SIZE);
1704 if (unlikely(!skb)) {
1705 rx_ring->rx_stats.alloc_rx_buff_failed++;
1706 break;
1707 }
1708
1709 /*
1710 * we will be copying header into skb->data in
1711 * pskb_may_pull so it is in our interest to prefetch
1712 * it now to avoid a possible cache miss
1713 */
1714 prefetchw(skb->data);
1715
1716 /*
1717 * Delay unmapping of the first packet. It carries the
1718 * header information, HW may still access the header
1719 * after the writeback. Only unmap it when EOP is
1720 * reached
1721 */
1722 IXGBE_CB(skb)->dma = rx_buffer->dma;
1723 } else {
1724 /* we are reusing so sync this buffer for CPU use */
1725 dma_sync_single_range_for_cpu(rx_ring->dev,
1726 rx_buffer->dma,
1727 rx_buffer->page_offset,
1728 ixgbe_rx_bufsz(rx_ring),
1729 DMA_FROM_DEVICE);
1730 }
1731
1732 /* pull page into skb */
1733 ixgbe_add_rx_frag(rx_ring, rx_buffer, skb,
1734 le16_to_cpu(rx_desc->wb.upper.length));
1735
1736 if (ixgbe_can_reuse_page(rx_buffer)) {
1737 /* hand second half of page back to the ring */
1738 ixgbe_reuse_rx_page(rx_ring, rx_buffer);
1739 } else if (IXGBE_CB(skb)->dma == rx_buffer->dma) {
1740 /* the page has been released from the ring */
1741 IXGBE_CB(skb)->page_released = true;
1742 } else {
1743 /* we are not reusing the buffer so unmap it */
1744 dma_unmap_page(rx_ring->dev, rx_buffer->dma,
1745 ixgbe_rx_pg_size(rx_ring),
1746 DMA_FROM_DEVICE);
1747 }
1748
1749 /* clear contents of buffer_info */
1750 rx_buffer->skb = NULL;
1751 rx_buffer->dma = 0;
1752 rx_buffer->page = NULL;
1753
1754 ixgbe_get_rsc_cnt(rx_ring, rx_desc, skb);
1755
1756 cleaned_count++;
1757
1758 /* place incomplete frames back on ring for completion */
1759 if (ixgbe_is_non_eop(rx_ring, rx_desc, skb))
1760 continue;
1761
1762 /* verify the packet layout is correct */
1763 if (ixgbe_cleanup_headers(rx_ring, rx_desc, skb))
1764 continue;
1765
1766 /* probably a little skewed due to removing CRC */
1767 total_rx_bytes += skb->len;
1768 total_rx_packets++;
1769
1770 /* populate checksum, timestamp, VLAN, and protocol */
1771 ixgbe_process_skb_fields(rx_ring, rx_desc, skb);
1772
1773 #ifdef IXGBE_FCOE
1774 /* if ddp, not passing to ULD unless for FCP_RSP or error */
1775 if (ixgbe_rx_is_fcoe(adapter, rx_desc)) {
1776 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
1777 if (!ddp_bytes) {
1778 dev_kfree_skb_any(skb);
1779 continue;
1780 }
1781 }
1782
1783 #endif /* IXGBE_FCOE */
1784 ixgbe_rx_skb(q_vector, skb);
1785
1786 /* update budget accounting */
1787 budget--;
1788 } while (likely(budget));
1789
1790 #ifdef IXGBE_FCOE
1791 /* include DDPed FCoE data */
1792 if (ddp_bytes > 0) {
1793 unsigned int mss;
1794
1795 mss = rx_ring->netdev->mtu - sizeof(struct fcoe_hdr) -
1796 sizeof(struct fc_frame_header) -
1797 sizeof(struct fcoe_crc_eof);
1798 if (mss > 512)
1799 mss &= ~511;
1800 total_rx_bytes += ddp_bytes;
1801 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
1802 }
1803
1804 #endif /* IXGBE_FCOE */
1805 u64_stats_update_begin(&rx_ring->syncp);
1806 rx_ring->stats.packets += total_rx_packets;
1807 rx_ring->stats.bytes += total_rx_bytes;
1808 u64_stats_update_end(&rx_ring->syncp);
1809 q_vector->rx.total_packets += total_rx_packets;
1810 q_vector->rx.total_bytes += total_rx_bytes;
1811
1812 if (cleaned_count)
1813 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1814
1815 return !!budget;
1816 }
1817
1818 /**
1819 * ixgbe_configure_msix - Configure MSI-X hardware
1820 * @adapter: board private structure
1821 *
1822 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
1823 * interrupts.
1824 **/
1825 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
1826 {
1827 struct ixgbe_q_vector *q_vector;
1828 int q_vectors, v_idx;
1829 u32 mask;
1830
1831 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1832
1833 /* Populate MSIX to EITR Select */
1834 if (adapter->num_vfs > 32) {
1835 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
1836 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
1837 }
1838
1839 /*
1840 * Populate the IVAR table and set the ITR values to the
1841 * corresponding register.
1842 */
1843 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1844 struct ixgbe_ring *ring;
1845 q_vector = adapter->q_vector[v_idx];
1846
1847 ixgbe_for_each_ring(ring, q_vector->rx)
1848 ixgbe_set_ivar(adapter, 0, ring->reg_idx, v_idx);
1849
1850 ixgbe_for_each_ring(ring, q_vector->tx)
1851 ixgbe_set_ivar(adapter, 1, ring->reg_idx, v_idx);
1852
1853 if (q_vector->tx.ring && !q_vector->rx.ring) {
1854 /* tx only vector */
1855 if (adapter->tx_itr_setting == 1)
1856 q_vector->itr = IXGBE_10K_ITR;
1857 else
1858 q_vector->itr = adapter->tx_itr_setting;
1859 } else {
1860 /* rx or rx/tx vector */
1861 if (adapter->rx_itr_setting == 1)
1862 q_vector->itr = IXGBE_20K_ITR;
1863 else
1864 q_vector->itr = adapter->rx_itr_setting;
1865 }
1866
1867 ixgbe_write_eitr(q_vector);
1868 }
1869
1870 switch (adapter->hw.mac.type) {
1871 case ixgbe_mac_82598EB:
1872 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
1873 v_idx);
1874 break;
1875 case ixgbe_mac_82599EB:
1876 case ixgbe_mac_X540:
1877 ixgbe_set_ivar(adapter, -1, 1, v_idx);
1878 break;
1879 default:
1880 break;
1881 }
1882 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
1883
1884 /* set up to autoclear timer, and the vectors */
1885 mask = IXGBE_EIMS_ENABLE_MASK;
1886 mask &= ~(IXGBE_EIMS_OTHER |
1887 IXGBE_EIMS_MAILBOX |
1888 IXGBE_EIMS_LSC);
1889
1890 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
1891 }
1892
1893 enum latency_range {
1894 lowest_latency = 0,
1895 low_latency = 1,
1896 bulk_latency = 2,
1897 latency_invalid = 255
1898 };
1899
1900 /**
1901 * ixgbe_update_itr - update the dynamic ITR value based on statistics
1902 * @q_vector: structure containing interrupt and ring information
1903 * @ring_container: structure containing ring performance data
1904 *
1905 * Stores a new ITR value based on packets and byte
1906 * counts during the last interrupt. The advantage of per interrupt
1907 * computation is faster updates and more accurate ITR for the current
1908 * traffic pattern. Constants in this function were computed
1909 * based on theoretical maximum wire speed and thresholds were set based
1910 * on testing data as well as attempting to minimize response time
1911 * while increasing bulk throughput.
1912 * this functionality is controlled by the InterruptThrottleRate module
1913 * parameter (see ixgbe_param.c)
1914 **/
1915 static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
1916 struct ixgbe_ring_container *ring_container)
1917 {
1918 int bytes = ring_container->total_bytes;
1919 int packets = ring_container->total_packets;
1920 u32 timepassed_us;
1921 u64 bytes_perint;
1922 u8 itr_setting = ring_container->itr;
1923
1924 if (packets == 0)
1925 return;
1926
1927 /* simple throttlerate management
1928 * 0-10MB/s lowest (100000 ints/s)
1929 * 10-20MB/s low (20000 ints/s)
1930 * 20-1249MB/s bulk (8000 ints/s)
1931 */
1932 /* what was last interrupt timeslice? */
1933 timepassed_us = q_vector->itr >> 2;
1934 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1935
1936 switch (itr_setting) {
1937 case lowest_latency:
1938 if (bytes_perint > 10)
1939 itr_setting = low_latency;
1940 break;
1941 case low_latency:
1942 if (bytes_perint > 20)
1943 itr_setting = bulk_latency;
1944 else if (bytes_perint <= 10)
1945 itr_setting = lowest_latency;
1946 break;
1947 case bulk_latency:
1948 if (bytes_perint <= 20)
1949 itr_setting = low_latency;
1950 break;
1951 }
1952
1953 /* clear work counters since we have the values we need */
1954 ring_container->total_bytes = 0;
1955 ring_container->total_packets = 0;
1956
1957 /* write updated itr to ring container */
1958 ring_container->itr = itr_setting;
1959 }
1960
1961 /**
1962 * ixgbe_write_eitr - write EITR register in hardware specific way
1963 * @q_vector: structure containing interrupt and ring information
1964 *
1965 * This function is made to be called by ethtool and by the driver
1966 * when it needs to update EITR registers at runtime. Hardware
1967 * specific quirks/differences are taken care of here.
1968 */
1969 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1970 {
1971 struct ixgbe_adapter *adapter = q_vector->adapter;
1972 struct ixgbe_hw *hw = &adapter->hw;
1973 int v_idx = q_vector->v_idx;
1974 u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
1975
1976 switch (adapter->hw.mac.type) {
1977 case ixgbe_mac_82598EB:
1978 /* must write high and low 16 bits to reset counter */
1979 itr_reg |= (itr_reg << 16);
1980 break;
1981 case ixgbe_mac_82599EB:
1982 case ixgbe_mac_X540:
1983 /*
1984 * set the WDIS bit to not clear the timer bits and cause an
1985 * immediate assertion of the interrupt
1986 */
1987 itr_reg |= IXGBE_EITR_CNT_WDIS;
1988 break;
1989 default:
1990 break;
1991 }
1992 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1993 }
1994
1995 static void ixgbe_set_itr(struct ixgbe_q_vector *q_vector)
1996 {
1997 u32 new_itr = q_vector->itr;
1998 u8 current_itr;
1999
2000 ixgbe_update_itr(q_vector, &q_vector->tx);
2001 ixgbe_update_itr(q_vector, &q_vector->rx);
2002
2003 current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
2004
2005 switch (current_itr) {
2006 /* counts and packets in update_itr are dependent on these numbers */
2007 case lowest_latency:
2008 new_itr = IXGBE_100K_ITR;
2009 break;
2010 case low_latency:
2011 new_itr = IXGBE_20K_ITR;
2012 break;
2013 case bulk_latency:
2014 new_itr = IXGBE_8K_ITR;
2015 break;
2016 default:
2017 break;
2018 }
2019
2020 if (new_itr != q_vector->itr) {
2021 /* do an exponential smoothing */
2022 new_itr = (10 * new_itr * q_vector->itr) /
2023 ((9 * new_itr) + q_vector->itr);
2024
2025 /* save the algorithm value here */
2026 q_vector->itr = new_itr;
2027
2028 ixgbe_write_eitr(q_vector);
2029 }
2030 }
2031
2032 /**
2033 * ixgbe_check_overtemp_subtask - check for over temperature
2034 * @adapter: pointer to adapter
2035 **/
2036 static void ixgbe_check_overtemp_subtask(struct ixgbe_adapter *adapter)
2037 {
2038 struct ixgbe_hw *hw = &adapter->hw;
2039 u32 eicr = adapter->interrupt_event;
2040
2041 if (test_bit(__IXGBE_DOWN, &adapter->state))
2042 return;
2043
2044 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
2045 !(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_EVENT))
2046 return;
2047
2048 adapter->flags2 &= ~IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2049
2050 switch (hw->device_id) {
2051 case IXGBE_DEV_ID_82599_T3_LOM:
2052 /*
2053 * Since the warning interrupt is for both ports
2054 * we don't have to check if:
2055 * - This interrupt wasn't for our port.
2056 * - We may have missed the interrupt so always have to
2057 * check if we got a LSC
2058 */
2059 if (!(eicr & IXGBE_EICR_GPI_SDP0) &&
2060 !(eicr & IXGBE_EICR_LSC))
2061 return;
2062
2063 if (!(eicr & IXGBE_EICR_LSC) && hw->mac.ops.check_link) {
2064 u32 autoneg;
2065 bool link_up = false;
2066
2067 hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
2068
2069 if (link_up)
2070 return;
2071 }
2072
2073 /* Check if this is not due to overtemp */
2074 if (hw->phy.ops.check_overtemp(hw) != IXGBE_ERR_OVERTEMP)
2075 return;
2076
2077 break;
2078 default:
2079 if (!(eicr & IXGBE_EICR_GPI_SDP0))
2080 return;
2081 break;
2082 }
2083 e_crit(drv,
2084 "Network adapter has been stopped because it has over heated. "
2085 "Restart the computer. If the problem persists, "
2086 "power off the system and replace the adapter\n");
2087
2088 adapter->interrupt_event = 0;
2089 }
2090
2091 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
2092 {
2093 struct ixgbe_hw *hw = &adapter->hw;
2094
2095 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
2096 (eicr & IXGBE_EICR_GPI_SDP1)) {
2097 e_crit(probe, "Fan has stopped, replace the adapter\n");
2098 /* write to clear the interrupt */
2099 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
2100 }
2101 }
2102
2103 static void ixgbe_check_overtemp_event(struct ixgbe_adapter *adapter, u32 eicr)
2104 {
2105 if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE))
2106 return;
2107
2108 switch (adapter->hw.mac.type) {
2109 case ixgbe_mac_82599EB:
2110 /*
2111 * Need to check link state so complete overtemp check
2112 * on service task
2113 */
2114 if (((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)) &&
2115 (!test_bit(__IXGBE_DOWN, &adapter->state))) {
2116 adapter->interrupt_event = eicr;
2117 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
2118 ixgbe_service_event_schedule(adapter);
2119 return;
2120 }
2121 return;
2122 case ixgbe_mac_X540:
2123 if (!(eicr & IXGBE_EICR_TS))
2124 return;
2125 break;
2126 default:
2127 return;
2128 }
2129
2130 e_crit(drv,
2131 "Network adapter has been stopped because it has over heated. "
2132 "Restart the computer. If the problem persists, "
2133 "power off the system and replace the adapter\n");
2134 }
2135
2136 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
2137 {
2138 struct ixgbe_hw *hw = &adapter->hw;
2139
2140 if (eicr & IXGBE_EICR_GPI_SDP2) {
2141 /* Clear the interrupt */
2142 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
2143 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2144 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
2145 ixgbe_service_event_schedule(adapter);
2146 }
2147 }
2148
2149 if (eicr & IXGBE_EICR_GPI_SDP1) {
2150 /* Clear the interrupt */
2151 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
2152 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2153 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
2154 ixgbe_service_event_schedule(adapter);
2155 }
2156 }
2157 }
2158
2159 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
2160 {
2161 struct ixgbe_hw *hw = &adapter->hw;
2162
2163 adapter->lsc_int++;
2164 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2165 adapter->link_check_timeout = jiffies;
2166 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2167 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
2168 IXGBE_WRITE_FLUSH(hw);
2169 ixgbe_service_event_schedule(adapter);
2170 }
2171 }
2172
2173 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
2174 u64 qmask)
2175 {
2176 u32 mask;
2177 struct ixgbe_hw *hw = &adapter->hw;
2178
2179 switch (hw->mac.type) {
2180 case ixgbe_mac_82598EB:
2181 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
2182 IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
2183 break;
2184 case ixgbe_mac_82599EB:
2185 case ixgbe_mac_X540:
2186 mask = (qmask & 0xFFFFFFFF);
2187 if (mask)
2188 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
2189 mask = (qmask >> 32);
2190 if (mask)
2191 IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
2192 break;
2193 default:
2194 break;
2195 }
2196 /* skip the flush */
2197 }
2198
2199 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
2200 u64 qmask)
2201 {
2202 u32 mask;
2203 struct ixgbe_hw *hw = &adapter->hw;
2204
2205 switch (hw->mac.type) {
2206 case ixgbe_mac_82598EB:
2207 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
2208 IXGBE_WRITE_REG(hw, IXGBE_EIMC, mask);
2209 break;
2210 case ixgbe_mac_82599EB:
2211 case ixgbe_mac_X540:
2212 mask = (qmask & 0xFFFFFFFF);
2213 if (mask)
2214 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(0), mask);
2215 mask = (qmask >> 32);
2216 if (mask)
2217 IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(1), mask);
2218 break;
2219 default:
2220 break;
2221 }
2222 /* skip the flush */
2223 }
2224
2225 /**
2226 * ixgbe_irq_enable - Enable default interrupt generation settings
2227 * @adapter: board private structure
2228 **/
2229 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
2230 bool flush)
2231 {
2232 u32 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
2233
2234 /* don't reenable LSC while waiting for link */
2235 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
2236 mask &= ~IXGBE_EIMS_LSC;
2237
2238 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
2239 switch (adapter->hw.mac.type) {
2240 case ixgbe_mac_82599EB:
2241 mask |= IXGBE_EIMS_GPI_SDP0;
2242 break;
2243 case ixgbe_mac_X540:
2244 mask |= IXGBE_EIMS_TS;
2245 break;
2246 default:
2247 break;
2248 }
2249 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
2250 mask |= IXGBE_EIMS_GPI_SDP1;
2251 switch (adapter->hw.mac.type) {
2252 case ixgbe_mac_82599EB:
2253 mask |= IXGBE_EIMS_GPI_SDP1;
2254 mask |= IXGBE_EIMS_GPI_SDP2;
2255 case ixgbe_mac_X540:
2256 mask |= IXGBE_EIMS_ECC;
2257 mask |= IXGBE_EIMS_MAILBOX;
2258 break;
2259 default:
2260 break;
2261 }
2262 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
2263 !(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
2264 mask |= IXGBE_EIMS_FLOW_DIR;
2265
2266 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
2267 if (queues)
2268 ixgbe_irq_enable_queues(adapter, ~0);
2269 if (flush)
2270 IXGBE_WRITE_FLUSH(&adapter->hw);
2271 }
2272
2273 static irqreturn_t ixgbe_msix_other(int irq, void *data)
2274 {
2275 struct ixgbe_adapter *adapter = data;
2276 struct ixgbe_hw *hw = &adapter->hw;
2277 u32 eicr;
2278
2279 /*
2280 * Workaround for Silicon errata. Use clear-by-write instead
2281 * of clear-by-read. Reading with EICS will return the
2282 * interrupt causes without clearing, which later be done
2283 * with the write to EICR.
2284 */
2285 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
2286 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
2287
2288 if (eicr & IXGBE_EICR_LSC)
2289 ixgbe_check_lsc(adapter);
2290
2291 if (eicr & IXGBE_EICR_MAILBOX)
2292 ixgbe_msg_task(adapter);
2293
2294 switch (hw->mac.type) {
2295 case ixgbe_mac_82599EB:
2296 case ixgbe_mac_X540:
2297 if (eicr & IXGBE_EICR_ECC)
2298 e_info(link, "Received unrecoverable ECC Err, please "
2299 "reboot\n");
2300 /* Handle Flow Director Full threshold interrupt */
2301 if (eicr & IXGBE_EICR_FLOW_DIR) {
2302 int reinit_count = 0;
2303 int i;
2304 for (i = 0; i < adapter->num_tx_queues; i++) {
2305 struct ixgbe_ring *ring = adapter->tx_ring[i];
2306 if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE,
2307 &ring->state))
2308 reinit_count++;
2309 }
2310 if (reinit_count) {
2311 /* no more flow director interrupts until after init */
2312 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_FLOW_DIR);
2313 adapter->flags2 |= IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
2314 ixgbe_service_event_schedule(adapter);
2315 }
2316 }
2317 ixgbe_check_sfp_event(adapter, eicr);
2318 ixgbe_check_overtemp_event(adapter, eicr);
2319 break;
2320 default:
2321 break;
2322 }
2323
2324 ixgbe_check_fan_failure(adapter, eicr);
2325 #ifdef CONFIG_IXGBE_PTP
2326 ixgbe_ptp_check_pps_event(adapter, eicr);
2327 #endif
2328
2329 /* re-enable the original interrupt state, no lsc, no queues */
2330 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2331 ixgbe_irq_enable(adapter, false, false);
2332
2333 return IRQ_HANDLED;
2334 }
2335
2336 static irqreturn_t ixgbe_msix_clean_rings(int irq, void *data)
2337 {
2338 struct ixgbe_q_vector *q_vector = data;
2339
2340 /* EIAM disabled interrupts (on this vector) for us */
2341
2342 if (q_vector->rx.ring || q_vector->tx.ring)
2343 napi_schedule(&q_vector->napi);
2344
2345 return IRQ_HANDLED;
2346 }
2347
2348 /**
2349 * ixgbe_poll - NAPI Rx polling callback
2350 * @napi: structure for representing this polling device
2351 * @budget: how many packets driver is allowed to clean
2352 *
2353 * This function is used for legacy and MSI, NAPI mode
2354 **/
2355 int ixgbe_poll(struct napi_struct *napi, int budget)
2356 {
2357 struct ixgbe_q_vector *q_vector =
2358 container_of(napi, struct ixgbe_q_vector, napi);
2359 struct ixgbe_adapter *adapter = q_vector->adapter;
2360 struct ixgbe_ring *ring;
2361 int per_ring_budget;
2362 bool clean_complete = true;
2363
2364 #ifdef CONFIG_IXGBE_DCA
2365 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2366 ixgbe_update_dca(q_vector);
2367 #endif
2368
2369 ixgbe_for_each_ring(ring, q_vector->tx)
2370 clean_complete &= !!ixgbe_clean_tx_irq(q_vector, ring);
2371
2372 /* attempt to distribute budget to each queue fairly, but don't allow
2373 * the budget to go below 1 because we'll exit polling */
2374 if (q_vector->rx.count > 1)
2375 per_ring_budget = max(budget/q_vector->rx.count, 1);
2376 else
2377 per_ring_budget = budget;
2378
2379 ixgbe_for_each_ring(ring, q_vector->rx)
2380 clean_complete &= ixgbe_clean_rx_irq(q_vector, ring,
2381 per_ring_budget);
2382
2383 /* If all work not completed, return budget and keep polling */
2384 if (!clean_complete)
2385 return budget;
2386
2387 /* all work done, exit the polling mode */
2388 napi_complete(napi);
2389 if (adapter->rx_itr_setting & 1)
2390 ixgbe_set_itr(q_vector);
2391 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2392 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
2393
2394 return 0;
2395 }
2396
2397 /**
2398 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2399 * @adapter: board private structure
2400 *
2401 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2402 * interrupts from the kernel.
2403 **/
2404 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2405 {
2406 struct net_device *netdev = adapter->netdev;
2407 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2408 int vector, err;
2409 int ri = 0, ti = 0;
2410
2411 for (vector = 0; vector < q_vectors; vector++) {
2412 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
2413 struct msix_entry *entry = &adapter->msix_entries[vector];
2414
2415 if (q_vector->tx.ring && q_vector->rx.ring) {
2416 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2417 "%s-%s-%d", netdev->name, "TxRx", ri++);
2418 ti++;
2419 } else if (q_vector->rx.ring) {
2420 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2421 "%s-%s-%d", netdev->name, "rx", ri++);
2422 } else if (q_vector->tx.ring) {
2423 snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2424 "%s-%s-%d", netdev->name, "tx", ti++);
2425 } else {
2426 /* skip this unused q_vector */
2427 continue;
2428 }
2429 err = request_irq(entry->vector, &ixgbe_msix_clean_rings, 0,
2430 q_vector->name, q_vector);
2431 if (err) {
2432 e_err(probe, "request_irq failed for MSIX interrupt "
2433 "Error: %d\n", err);
2434 goto free_queue_irqs;
2435 }
2436 /* If Flow Director is enabled, set interrupt affinity */
2437 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2438 /* assign the mask for this irq */
2439 irq_set_affinity_hint(entry->vector,
2440 &q_vector->affinity_mask);
2441 }
2442 }
2443
2444 err = request_irq(adapter->msix_entries[vector].vector,
2445 ixgbe_msix_other, 0, netdev->name, adapter);
2446 if (err) {
2447 e_err(probe, "request_irq for msix_other failed: %d\n", err);
2448 goto free_queue_irqs;
2449 }
2450
2451 return 0;
2452
2453 free_queue_irqs:
2454 while (vector) {
2455 vector--;
2456 irq_set_affinity_hint(adapter->msix_entries[vector].vector,
2457 NULL);
2458 free_irq(adapter->msix_entries[vector].vector,
2459 adapter->q_vector[vector]);
2460 }
2461 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2462 pci_disable_msix(adapter->pdev);
2463 kfree(adapter->msix_entries);
2464 adapter->msix_entries = NULL;
2465 return err;
2466 }
2467
2468 /**
2469 * ixgbe_intr - legacy mode Interrupt Handler
2470 * @irq: interrupt number
2471 * @data: pointer to a network interface device structure
2472 **/
2473 static irqreturn_t ixgbe_intr(int irq, void *data)
2474 {
2475 struct ixgbe_adapter *adapter = data;
2476 struct ixgbe_hw *hw = &adapter->hw;
2477 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2478 u32 eicr;
2479
2480 /*
2481 * Workaround for silicon errata #26 on 82598. Mask the interrupt
2482 * before the read of EICR.
2483 */
2484 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2485
2486 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2487 * therefore no explicit interrupt disable is necessary */
2488 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2489 if (!eicr) {
2490 /*
2491 * shared interrupt alert!
2492 * make sure interrupts are enabled because the read will
2493 * have disabled interrupts due to EIAM
2494 * finish the workaround of silicon errata on 82598. Unmask
2495 * the interrupt that we masked before the EICR read.
2496 */
2497 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2498 ixgbe_irq_enable(adapter, true, true);
2499 return IRQ_NONE; /* Not our interrupt */
2500 }
2501
2502 if (eicr & IXGBE_EICR_LSC)
2503 ixgbe_check_lsc(adapter);
2504
2505 switch (hw->mac.type) {
2506 case ixgbe_mac_82599EB:
2507 ixgbe_check_sfp_event(adapter, eicr);
2508 /* Fall through */
2509 case ixgbe_mac_X540:
2510 if (eicr & IXGBE_EICR_ECC)
2511 e_info(link, "Received unrecoverable ECC err, please "
2512 "reboot\n");
2513 ixgbe_check_overtemp_event(adapter, eicr);
2514 break;
2515 default:
2516 break;
2517 }
2518
2519 ixgbe_check_fan_failure(adapter, eicr);
2520 #ifdef CONFIG_IXGBE_PTP
2521 ixgbe_ptp_check_pps_event(adapter, eicr);
2522 #endif
2523
2524 /* would disable interrupts here but EIAM disabled it */
2525 napi_schedule(&q_vector->napi);
2526
2527 /*
2528 * re-enable link(maybe) and non-queue interrupts, no flush.
2529 * ixgbe_poll will re-enable the queue interrupts
2530 */
2531 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2532 ixgbe_irq_enable(adapter, false, false);
2533
2534 return IRQ_HANDLED;
2535 }
2536
2537 /**
2538 * ixgbe_request_irq - initialize interrupts
2539 * @adapter: board private structure
2540 *
2541 * Attempts to configure interrupts using the best available
2542 * capabilities of the hardware and kernel.
2543 **/
2544 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
2545 {
2546 struct net_device *netdev = adapter->netdev;
2547 int err;
2548
2549 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2550 err = ixgbe_request_msix_irqs(adapter);
2551 else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED)
2552 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
2553 netdev->name, adapter);
2554 else
2555 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
2556 netdev->name, adapter);
2557
2558 if (err)
2559 e_err(probe, "request_irq failed, Error %d\n", err);
2560
2561 return err;
2562 }
2563
2564 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
2565 {
2566 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2567 int i, q_vectors;
2568
2569 q_vectors = adapter->num_msix_vectors;
2570 i = q_vectors - 1;
2571 free_irq(adapter->msix_entries[i].vector, adapter);
2572 i--;
2573
2574 for (; i >= 0; i--) {
2575 /* free only the irqs that were actually requested */
2576 if (!adapter->q_vector[i]->rx.ring &&
2577 !adapter->q_vector[i]->tx.ring)
2578 continue;
2579
2580 /* clear the affinity_mask in the IRQ descriptor */
2581 irq_set_affinity_hint(adapter->msix_entries[i].vector,
2582 NULL);
2583
2584 free_irq(adapter->msix_entries[i].vector,
2585 adapter->q_vector[i]);
2586 }
2587 } else {
2588 free_irq(adapter->pdev->irq, adapter);
2589 }
2590 }
2591
2592 /**
2593 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
2594 * @adapter: board private structure
2595 **/
2596 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
2597 {
2598 switch (adapter->hw.mac.type) {
2599 case ixgbe_mac_82598EB:
2600 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
2601 break;
2602 case ixgbe_mac_82599EB:
2603 case ixgbe_mac_X540:
2604 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
2605 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
2606 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
2607 break;
2608 default:
2609 break;
2610 }
2611 IXGBE_WRITE_FLUSH(&adapter->hw);
2612 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2613 int i;
2614 for (i = 0; i < adapter->num_msix_vectors; i++)
2615 synchronize_irq(adapter->msix_entries[i].vector);
2616 } else {
2617 synchronize_irq(adapter->pdev->irq);
2618 }
2619 }
2620
2621 /**
2622 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
2623 *
2624 **/
2625 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
2626 {
2627 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2628
2629 /* rx/tx vector */
2630 if (adapter->rx_itr_setting == 1)
2631 q_vector->itr = IXGBE_20K_ITR;
2632 else
2633 q_vector->itr = adapter->rx_itr_setting;
2634
2635 ixgbe_write_eitr(q_vector);
2636
2637 ixgbe_set_ivar(adapter, 0, 0, 0);
2638 ixgbe_set_ivar(adapter, 1, 0, 0);
2639
2640 e_info(hw, "Legacy interrupt IVAR setup done\n");
2641 }
2642
2643 /**
2644 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
2645 * @adapter: board private structure
2646 * @ring: structure containing ring specific data
2647 *
2648 * Configure the Tx descriptor ring after a reset.
2649 **/
2650 void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
2651 struct ixgbe_ring *ring)
2652 {
2653 struct ixgbe_hw *hw = &adapter->hw;
2654 u64 tdba = ring->dma;
2655 int wait_loop = 10;
2656 u32 txdctl = IXGBE_TXDCTL_ENABLE;
2657 u8 reg_idx = ring->reg_idx;
2658
2659 /* disable queue to avoid issues while updating state */
2660 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), 0);
2661 IXGBE_WRITE_FLUSH(hw);
2662
2663 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
2664 (tdba & DMA_BIT_MASK(32)));
2665 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
2666 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
2667 ring->count * sizeof(union ixgbe_adv_tx_desc));
2668 IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
2669 IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
2670 ring->tail = hw->hw_addr + IXGBE_TDT(reg_idx);
2671
2672 /*
2673 * set WTHRESH to encourage burst writeback, it should not be set
2674 * higher than 1 when ITR is 0 as it could cause false TX hangs
2675 *
2676 * In order to avoid issues WTHRESH + PTHRESH should always be equal
2677 * to or less than the number of on chip descriptors, which is
2678 * currently 40.
2679 */
2680 if (!ring->q_vector || (ring->q_vector->itr < 8))
2681 txdctl |= (1 << 16); /* WTHRESH = 1 */
2682 else
2683 txdctl |= (8 << 16); /* WTHRESH = 8 */
2684
2685 /*
2686 * Setting PTHRESH to 32 both improves performance
2687 * and avoids a TX hang with DFP enabled
2688 */
2689 txdctl |= (1 << 8) | /* HTHRESH = 1 */
2690 32; /* PTHRESH = 32 */
2691
2692 /* reinitialize flowdirector state */
2693 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
2694 adapter->atr_sample_rate) {
2695 ring->atr_sample_rate = adapter->atr_sample_rate;
2696 ring->atr_count = 0;
2697 set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state);
2698 } else {
2699 ring->atr_sample_rate = 0;
2700 }
2701
2702 clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state);
2703
2704 /* enable queue */
2705 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
2706
2707 /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2708 if (hw->mac.type == ixgbe_mac_82598EB &&
2709 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2710 return;
2711
2712 /* poll to verify queue is enabled */
2713 do {
2714 usleep_range(1000, 2000);
2715 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2716 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
2717 if (!wait_loop)
2718 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx);
2719 }
2720
2721 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
2722 {
2723 struct ixgbe_hw *hw = &adapter->hw;
2724 u32 rttdcs;
2725 u32 reg;
2726 u8 tcs = netdev_get_num_tc(adapter->netdev);
2727
2728 if (hw->mac.type == ixgbe_mac_82598EB)
2729 return;
2730
2731 /* disable the arbiter while setting MTQC */
2732 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
2733 rttdcs |= IXGBE_RTTDCS_ARBDIS;
2734 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2735
2736 /* set transmit pool layout */
2737 switch (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
2738 case (IXGBE_FLAG_SRIOV_ENABLED):
2739 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2740 (IXGBE_MTQC_VT_ENA | IXGBE_MTQC_64VF));
2741 break;
2742 default:
2743 if (!tcs)
2744 reg = IXGBE_MTQC_64Q_1PB;
2745 else if (tcs <= 4)
2746 reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
2747 else
2748 reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
2749
2750 IXGBE_WRITE_REG(hw, IXGBE_MTQC, reg);
2751
2752 /* Enable Security TX Buffer IFG for multiple pb */
2753 if (tcs) {
2754 reg = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);
2755 reg |= IXGBE_SECTX_DCB;
2756 IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, reg);
2757 }
2758 break;
2759 }
2760
2761 /* re-enable the arbiter */
2762 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
2763 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2764 }
2765
2766 /**
2767 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
2768 * @adapter: board private structure
2769 *
2770 * Configure the Tx unit of the MAC after a reset.
2771 **/
2772 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
2773 {
2774 struct ixgbe_hw *hw = &adapter->hw;
2775 u32 dmatxctl;
2776 u32 i;
2777
2778 ixgbe_setup_mtqc(adapter);
2779
2780 if (hw->mac.type != ixgbe_mac_82598EB) {
2781 /* DMATXCTL.EN must be before Tx queues are enabled */
2782 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2783 dmatxctl |= IXGBE_DMATXCTL_TE;
2784 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2785 }
2786
2787 /* Setup the HW Tx Head and Tail descriptor pointers */
2788 for (i = 0; i < adapter->num_tx_queues; i++)
2789 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
2790 }
2791
2792 static void ixgbe_enable_rx_drop(struct ixgbe_adapter *adapter,
2793 struct ixgbe_ring *ring)
2794 {
2795 struct ixgbe_hw *hw = &adapter->hw;
2796 u8 reg_idx = ring->reg_idx;
2797 u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
2798
2799 srrctl |= IXGBE_SRRCTL_DROP_EN;
2800
2801 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
2802 }
2803
2804 static void ixgbe_disable_rx_drop(struct ixgbe_adapter *adapter,
2805 struct ixgbe_ring *ring)
2806 {
2807 struct ixgbe_hw *hw = &adapter->hw;
2808 u8 reg_idx = ring->reg_idx;
2809 u32 srrctl = IXGBE_READ_REG(hw, IXGBE_SRRCTL(reg_idx));
2810
2811 srrctl &= ~IXGBE_SRRCTL_DROP_EN;
2812
2813 IXGBE_WRITE_REG(hw, IXGBE_SRRCTL(reg_idx), srrctl);
2814 }
2815
2816 #ifdef CONFIG_IXGBE_DCB
2817 void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
2818 #else
2819 static void ixgbe_set_rx_drop_en(struct ixgbe_adapter *adapter)
2820 #endif
2821 {
2822 int i;
2823 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
2824
2825 if (adapter->ixgbe_ieee_pfc)
2826 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
2827
2828 /*
2829 * We should set the drop enable bit if:
2830 * SR-IOV is enabled
2831 * or
2832 * Number of Rx queues > 1 and flow control is disabled
2833 *
2834 * This allows us to avoid head of line blocking for security
2835 * and performance reasons.
2836 */
2837 if (adapter->num_vfs || (adapter->num_rx_queues > 1 &&
2838 !(adapter->hw.fc.current_mode & ixgbe_fc_tx_pause) && !pfc_en)) {
2839 for (i = 0; i < adapter->num_rx_queues; i++)
2840 ixgbe_enable_rx_drop(adapter, adapter->rx_ring[i]);
2841 } else {
2842 for (i = 0; i < adapter->num_rx_queues; i++)
2843 ixgbe_disable_rx_drop(adapter, adapter->rx_ring[i]);
2844 }
2845 }
2846
2847 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
2848
2849 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
2850 struct ixgbe_ring *rx_ring)
2851 {
2852 u32 srrctl;
2853 u8 reg_idx = rx_ring->reg_idx;
2854
2855 switch (adapter->hw.mac.type) {
2856 case ixgbe_mac_82598EB: {
2857 struct ixgbe_ring_feature *feature = adapter->ring_feature;
2858 const int mask = feature[RING_F_RSS].mask;
2859 reg_idx = reg_idx & mask;
2860 }
2861 break;
2862 case ixgbe_mac_82599EB:
2863 case ixgbe_mac_X540:
2864 default:
2865 break;
2866 }
2867
2868 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(reg_idx));
2869
2870 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
2871 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
2872 if (adapter->num_vfs)
2873 srrctl |= IXGBE_SRRCTL_DROP_EN;
2874
2875 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
2876 IXGBE_SRRCTL_BSIZEHDR_MASK;
2877
2878 #if PAGE_SIZE > IXGBE_MAX_RXBUFFER
2879 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2880 #else
2881 srrctl |= ixgbe_rx_bufsz(rx_ring) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2882 #endif
2883 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
2884
2885 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(reg_idx), srrctl);
2886 }
2887
2888 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
2889 {
2890 struct ixgbe_hw *hw = &adapter->hw;
2891 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2892 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2893 0x6A3E67EA, 0x14364D17, 0x3BED200D};
2894 u32 mrqc = 0, reta = 0;
2895 u32 rxcsum;
2896 int i, j;
2897 u8 tcs = netdev_get_num_tc(adapter->netdev);
2898 int maxq = adapter->ring_feature[RING_F_RSS].indices;
2899
2900 if (tcs)
2901 maxq = min(maxq, adapter->num_tx_queues / tcs);
2902
2903 /* Fill out hash function seeds */
2904 for (i = 0; i < 10; i++)
2905 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2906
2907 /* Fill out redirection table */
2908 for (i = 0, j = 0; i < 128; i++, j++) {
2909 if (j == maxq)
2910 j = 0;
2911 /* reta = 4-byte sliding window of
2912 * 0x00..(indices-1)(indices-1)00..etc. */
2913 reta = (reta << 8) | (j * 0x11);
2914 if ((i & 3) == 3)
2915 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2916 }
2917
2918 /* Disable indicating checksum in descriptor, enables RSS hash */
2919 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2920 rxcsum |= IXGBE_RXCSUM_PCSD;
2921 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2922
2923 if (adapter->hw.mac.type == ixgbe_mac_82598EB &&
2924 (adapter->flags & IXGBE_FLAG_RSS_ENABLED)) {
2925 mrqc = IXGBE_MRQC_RSSEN;
2926 } else {
2927 int mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
2928 | IXGBE_FLAG_SRIOV_ENABLED);
2929
2930 switch (mask) {
2931 case (IXGBE_FLAG_RSS_ENABLED):
2932 if (!tcs)
2933 mrqc = IXGBE_MRQC_RSSEN;
2934 else if (tcs <= 4)
2935 mrqc = IXGBE_MRQC_RTRSS4TCEN;
2936 else
2937 mrqc = IXGBE_MRQC_RTRSS8TCEN;
2938 break;
2939 case (IXGBE_FLAG_SRIOV_ENABLED):
2940 mrqc = IXGBE_MRQC_VMDQEN;
2941 break;
2942 default:
2943 break;
2944 }
2945 }
2946
2947 /* Perform hash on these packet types */
2948 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2949 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2950 | IXGBE_MRQC_RSS_FIELD_IPV6
2951 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
2952
2953 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV4_UDP)
2954 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4_UDP;
2955 if (adapter->flags2 & IXGBE_FLAG2_RSS_FIELD_IPV6_UDP)
2956 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
2957
2958 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2959 }
2960
2961 /**
2962 * ixgbe_configure_rscctl - enable RSC for the indicated ring
2963 * @adapter: address of board private structure
2964 * @index: index of ring to set
2965 **/
2966 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
2967 struct ixgbe_ring *ring)
2968 {
2969 struct ixgbe_hw *hw = &adapter->hw;
2970 u32 rscctrl;
2971 u8 reg_idx = ring->reg_idx;
2972
2973 if (!ring_is_rsc_enabled(ring))
2974 return;
2975
2976 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
2977 rscctrl |= IXGBE_RSCCTL_RSCEN;
2978 /*
2979 * we must limit the number of descriptors so that the
2980 * total size of max desc * buf_len is not greater
2981 * than 65536
2982 */
2983 #if (PAGE_SIZE <= 8192)
2984 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2985 #elif (PAGE_SIZE <= 16384)
2986 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2987 #else
2988 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2989 #endif
2990 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
2991 }
2992
2993 #define IXGBE_MAX_RX_DESC_POLL 10
2994 static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
2995 struct ixgbe_ring *ring)
2996 {
2997 struct ixgbe_hw *hw = &adapter->hw;
2998 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
2999 u32 rxdctl;
3000 u8 reg_idx = ring->reg_idx;
3001
3002 /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
3003 if (hw->mac.type == ixgbe_mac_82598EB &&
3004 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3005 return;
3006
3007 do {
3008 usleep_range(1000, 2000);
3009 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3010 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
3011
3012 if (!wait_loop) {
3013 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
3014 "the polling period\n", reg_idx);
3015 }
3016 }
3017
3018 void ixgbe_disable_rx_queue(struct ixgbe_adapter *adapter,
3019 struct ixgbe_ring *ring)
3020 {
3021 struct ixgbe_hw *hw = &adapter->hw;
3022 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
3023 u32 rxdctl;
3024 u8 reg_idx = ring->reg_idx;
3025
3026 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3027 rxdctl &= ~IXGBE_RXDCTL_ENABLE;
3028
3029 /* write value back with RXDCTL.ENABLE bit cleared */
3030 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3031
3032 if (hw->mac.type == ixgbe_mac_82598EB &&
3033 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
3034 return;
3035
3036 /* the hardware may take up to 100us to really disable the rx queue */
3037 do {
3038 udelay(10);
3039 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3040 } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
3041
3042 if (!wait_loop) {
3043 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not cleared within "
3044 "the polling period\n", reg_idx);
3045 }
3046 }
3047
3048 void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
3049 struct ixgbe_ring *ring)
3050 {
3051 struct ixgbe_hw *hw = &adapter->hw;
3052 u64 rdba = ring->dma;
3053 u32 rxdctl;
3054 u8 reg_idx = ring->reg_idx;
3055
3056 /* disable queue to avoid issues while updating state */
3057 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
3058 ixgbe_disable_rx_queue(adapter, ring);
3059
3060 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
3061 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
3062 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
3063 ring->count * sizeof(union ixgbe_adv_rx_desc));
3064 IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
3065 IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
3066 ring->tail = hw->hw_addr + IXGBE_RDT(reg_idx);
3067
3068 ixgbe_configure_srrctl(adapter, ring);
3069 ixgbe_configure_rscctl(adapter, ring);
3070
3071 /* If operating in IOV mode set RLPML for X540 */
3072 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) &&
3073 hw->mac.type == ixgbe_mac_X540) {
3074 rxdctl &= ~IXGBE_RXDCTL_RLPMLMASK;
3075 rxdctl |= ((ring->netdev->mtu + ETH_HLEN +
3076 ETH_FCS_LEN + VLAN_HLEN) | IXGBE_RXDCTL_RLPML_EN);
3077 }
3078
3079 if (hw->mac.type == ixgbe_mac_82598EB) {
3080 /*
3081 * enable cache line friendly hardware writes:
3082 * PTHRESH=32 descriptors (half the internal cache),
3083 * this also removes ugly rx_no_buffer_count increment
3084 * HTHRESH=4 descriptors (to minimize latency on fetch)
3085 * WTHRESH=8 burst writeback up to two cache lines
3086 */
3087 rxdctl &= ~0x3FFFFF;
3088 rxdctl |= 0x080420;
3089 }
3090
3091 /* enable receive descriptor ring */
3092 rxdctl |= IXGBE_RXDCTL_ENABLE;
3093 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
3094
3095 ixgbe_rx_desc_queue_enable(adapter, ring);
3096 ixgbe_alloc_rx_buffers(ring, ixgbe_desc_unused(ring));
3097 }
3098
3099 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
3100 {
3101 struct ixgbe_hw *hw = &adapter->hw;
3102 int p;
3103
3104 /* PSRTYPE must be initialized in non 82598 adapters */
3105 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
3106 IXGBE_PSRTYPE_UDPHDR |
3107 IXGBE_PSRTYPE_IPV4HDR |
3108 IXGBE_PSRTYPE_L2HDR |
3109 IXGBE_PSRTYPE_IPV6HDR;
3110
3111 if (hw->mac.type == ixgbe_mac_82598EB)
3112 return;
3113
3114 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED)
3115 psrtype |= (adapter->num_rx_queues_per_pool << 29);
3116
3117 for (p = 0; p < adapter->num_rx_pools; p++)
3118 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(adapter->num_vfs + p),
3119 psrtype);
3120 }
3121
3122 static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
3123 {
3124 struct ixgbe_hw *hw = &adapter->hw;
3125 u32 gcr_ext;
3126 u32 vt_reg_bits;
3127 u32 reg_offset, vf_shift;
3128 u32 vmdctl;
3129 int i;
3130
3131 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
3132 return;
3133
3134 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
3135 vt_reg_bits = IXGBE_VMD_CTL_VMDQ_EN | IXGBE_VT_CTL_REPLEN;
3136 vt_reg_bits |= (adapter->num_vfs << IXGBE_VT_CTL_POOL_SHIFT);
3137 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl | vt_reg_bits);
3138
3139 vf_shift = adapter->num_vfs % 32;
3140 reg_offset = (adapter->num_vfs >= 32) ? 1 : 0;
3141
3142 /* Enable only the PF's pool for Tx/Rx */
3143 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (1 << vf_shift));
3144 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), 0);
3145 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (1 << vf_shift));
3146 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), 0);
3147 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
3148
3149 /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
3150 hw->mac.ops.set_vmdq(hw, 0, adapter->num_vfs);
3151
3152 /*
3153 * Set up VF register offsets for selected VT Mode,
3154 * i.e. 32 or 64 VFs for SR-IOV
3155 */
3156 gcr_ext = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
3157 gcr_ext |= IXGBE_GCR_EXT_MSIX_EN;
3158 gcr_ext |= IXGBE_GCR_EXT_VT_MODE_64;
3159 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
3160
3161 /* enable Tx loopback for VF/PF communication */
3162 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
3163 /* Enable MAC Anti-Spoofing */
3164 hw->mac.ops.set_mac_anti_spoofing(hw,
3165 (adapter->num_vfs != 0),
3166 adapter->num_vfs);
3167 /* For VFs that have spoof checking turned off */
3168 for (i = 0; i < adapter->num_vfs; i++) {
3169 if (!adapter->vfinfo[i].spoofchk_enabled)
3170 ixgbe_ndo_set_vf_spoofchk(adapter->netdev, i, false);
3171 }
3172 }
3173
3174 static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
3175 {
3176 struct ixgbe_hw *hw = &adapter->hw;
3177 struct net_device *netdev = adapter->netdev;
3178 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3179 struct ixgbe_ring *rx_ring;
3180 int i;
3181 u32 mhadd, hlreg0;
3182
3183 #ifdef IXGBE_FCOE
3184 /* adjust max frame to be able to do baby jumbo for FCoE */
3185 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
3186 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
3187 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
3188
3189 #endif /* IXGBE_FCOE */
3190 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
3191 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
3192 mhadd &= ~IXGBE_MHADD_MFS_MASK;
3193 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
3194
3195 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
3196 }
3197
3198 /* MHADD will allow an extra 4 bytes past for vlan tagged frames */
3199 max_frame += VLAN_HLEN;
3200
3201 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
3202 /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
3203 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
3204 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
3205
3206 /*
3207 * Setup the HW Rx Head and Tail Descriptor Pointers and
3208 * the Base and Length of the Rx Descriptor Ring
3209 */
3210 for (i = 0; i < adapter->num_rx_queues; i++) {
3211 rx_ring = adapter->rx_ring[i];
3212 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
3213 set_ring_rsc_enabled(rx_ring);
3214 else
3215 clear_ring_rsc_enabled(rx_ring);
3216 }
3217 }
3218
3219 static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
3220 {
3221 struct ixgbe_hw *hw = &adapter->hw;
3222 u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
3223
3224 switch (hw->mac.type) {
3225 case ixgbe_mac_82598EB:
3226 /*
3227 * For VMDq support of different descriptor types or
3228 * buffer sizes through the use of multiple SRRCTL
3229 * registers, RDRXCTL.MVMEN must be set to 1
3230 *
3231 * also, the manual doesn't mention it clearly but DCA hints
3232 * will only use queue 0's tags unless this bit is set. Side
3233 * effects of setting this bit are only that SRRCTL must be
3234 * fully programmed [0..15]
3235 */
3236 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
3237 break;
3238 case ixgbe_mac_82599EB:
3239 case ixgbe_mac_X540:
3240 /* Disable RSC for ACK packets */
3241 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
3242 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
3243 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
3244 /* hardware requires some bits to be set by default */
3245 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
3246 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
3247 break;
3248 default:
3249 /* We should do nothing since we don't know this hardware */
3250 return;
3251 }
3252
3253 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
3254 }
3255
3256 /**
3257 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
3258 * @adapter: board private structure
3259 *
3260 * Configure the Rx unit of the MAC after a reset.
3261 **/
3262 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
3263 {
3264 struct ixgbe_hw *hw = &adapter->hw;
3265 int i;
3266 u32 rxctrl;
3267
3268 /* disable receives while setting up the descriptors */
3269 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3270 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3271
3272 ixgbe_setup_psrtype(adapter);
3273 ixgbe_setup_rdrxctl(adapter);
3274
3275 /* Program registers for the distribution of queues */
3276 ixgbe_setup_mrqc(adapter);
3277
3278 /* set_rx_buffer_len must be called before ring initialization */
3279 ixgbe_set_rx_buffer_len(adapter);
3280
3281 /*
3282 * Setup the HW Rx Head and Tail Descriptor Pointers and
3283 * the Base and Length of the Rx Descriptor Ring
3284 */
3285 for (i = 0; i < adapter->num_rx_queues; i++)
3286 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
3287
3288 /* disable drop enable for 82598 parts */
3289 if (hw->mac.type == ixgbe_mac_82598EB)
3290 rxctrl |= IXGBE_RXCTRL_DMBYPS;
3291
3292 /* enable all receives */
3293 rxctrl |= IXGBE_RXCTRL_RXEN;
3294 hw->mac.ops.enable_rx_dma(hw, rxctrl);
3295 }
3296
3297 static int ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
3298 {
3299 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3300 struct ixgbe_hw *hw = &adapter->hw;
3301 int pool_ndx = adapter->num_vfs;
3302
3303 /* add VID to filter table */
3304 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, true);
3305 set_bit(vid, adapter->active_vlans);
3306
3307 return 0;
3308 }
3309
3310 static int ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
3311 {
3312 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3313 struct ixgbe_hw *hw = &adapter->hw;
3314 int pool_ndx = adapter->num_vfs;
3315
3316 /* remove VID from filter table */
3317 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, false);
3318 clear_bit(vid, adapter->active_vlans);
3319
3320 return 0;
3321 }
3322
3323 /**
3324 * ixgbe_vlan_filter_disable - helper to disable hw vlan filtering
3325 * @adapter: driver data
3326 */
3327 static void ixgbe_vlan_filter_disable(struct ixgbe_adapter *adapter)
3328 {
3329 struct ixgbe_hw *hw = &adapter->hw;
3330 u32 vlnctrl;
3331
3332 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3333 vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
3334 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3335 }
3336
3337 /**
3338 * ixgbe_vlan_filter_enable - helper to enable hw vlan filtering
3339 * @adapter: driver data
3340 */
3341 static void ixgbe_vlan_filter_enable(struct ixgbe_adapter *adapter)
3342 {
3343 struct ixgbe_hw *hw = &adapter->hw;
3344 u32 vlnctrl;
3345
3346 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3347 vlnctrl |= IXGBE_VLNCTRL_VFE;
3348 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
3349 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3350 }
3351
3352 /**
3353 * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping
3354 * @adapter: driver data
3355 */
3356 static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
3357 {
3358 struct ixgbe_hw *hw = &adapter->hw;
3359 u32 vlnctrl;
3360 int i, j;
3361
3362 switch (hw->mac.type) {
3363 case ixgbe_mac_82598EB:
3364 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3365 vlnctrl &= ~IXGBE_VLNCTRL_VME;
3366 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3367 break;
3368 case ixgbe_mac_82599EB:
3369 case ixgbe_mac_X540:
3370 for (i = 0; i < adapter->num_rx_queues; i++) {
3371 j = adapter->rx_ring[i]->reg_idx;
3372 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3373 vlnctrl &= ~IXGBE_RXDCTL_VME;
3374 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3375 }
3376 break;
3377 default:
3378 break;
3379 }
3380 }
3381
3382 /**
3383 * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping
3384 * @adapter: driver data
3385 */
3386 static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
3387 {
3388 struct ixgbe_hw *hw = &adapter->hw;
3389 u32 vlnctrl;
3390 int i, j;
3391
3392 switch (hw->mac.type) {
3393 case ixgbe_mac_82598EB:
3394 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3395 vlnctrl |= IXGBE_VLNCTRL_VME;
3396 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3397 break;
3398 case ixgbe_mac_82599EB:
3399 case ixgbe_mac_X540:
3400 for (i = 0; i < adapter->num_rx_queues; i++) {
3401 j = adapter->rx_ring[i]->reg_idx;
3402 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3403 vlnctrl |= IXGBE_RXDCTL_VME;
3404 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3405 }
3406 break;
3407 default:
3408 break;
3409 }
3410 }
3411
3412 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
3413 {
3414 u16 vid;
3415
3416 ixgbe_vlan_rx_add_vid(adapter->netdev, 0);
3417
3418 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
3419 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
3420 }
3421
3422 /**
3423 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
3424 * @netdev: network interface device structure
3425 *
3426 * Writes unicast address list to the RAR table.
3427 * Returns: -ENOMEM on failure/insufficient address space
3428 * 0 on no addresses written
3429 * X on writing X addresses to the RAR table
3430 **/
3431 static int ixgbe_write_uc_addr_list(struct net_device *netdev)
3432 {
3433 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3434 struct ixgbe_hw *hw = &adapter->hw;
3435 unsigned int vfn = adapter->num_vfs;
3436 unsigned int rar_entries = IXGBE_MAX_PF_MACVLANS;
3437 int count = 0;
3438
3439 /* return ENOMEM indicating insufficient memory for addresses */
3440 if (netdev_uc_count(netdev) > rar_entries)
3441 return -ENOMEM;
3442
3443 if (!netdev_uc_empty(netdev) && rar_entries) {
3444 struct netdev_hw_addr *ha;
3445 /* return error if we do not support writing to RAR table */
3446 if (!hw->mac.ops.set_rar)
3447 return -ENOMEM;
3448
3449 netdev_for_each_uc_addr(ha, netdev) {
3450 if (!rar_entries)
3451 break;
3452 hw->mac.ops.set_rar(hw, rar_entries--, ha->addr,
3453 vfn, IXGBE_RAH_AV);
3454 count++;
3455 }
3456 }
3457 /* write the addresses in reverse order to avoid write combining */
3458 for (; rar_entries > 0 ; rar_entries--)
3459 hw->mac.ops.clear_rar(hw, rar_entries);
3460
3461 return count;
3462 }
3463
3464 /**
3465 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
3466 * @netdev: network interface device structure
3467 *
3468 * The set_rx_method entry point is called whenever the unicast/multicast
3469 * address list or the network interface flags are updated. This routine is
3470 * responsible for configuring the hardware for proper unicast, multicast and
3471 * promiscuous mode.
3472 **/
3473 void ixgbe_set_rx_mode(struct net_device *netdev)
3474 {
3475 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3476 struct ixgbe_hw *hw = &adapter->hw;
3477 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
3478 int count;
3479
3480 /* Check for Promiscuous and All Multicast modes */
3481
3482 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3483
3484 /* set all bits that we expect to always be set */
3485 fctrl &= ~IXGBE_FCTRL_SBP; /* disable store-bad-packets */
3486 fctrl |= IXGBE_FCTRL_BAM;
3487 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
3488 fctrl |= IXGBE_FCTRL_PMCF;
3489
3490 /* clear the bits we are changing the status of */
3491 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3492
3493 if (netdev->flags & IFF_PROMISC) {
3494 hw->addr_ctrl.user_set_promisc = true;
3495 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3496 vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_MPE);
3497 /* don't hardware filter vlans in promisc mode */
3498 ixgbe_vlan_filter_disable(adapter);
3499 } else {
3500 if (netdev->flags & IFF_ALLMULTI) {
3501 fctrl |= IXGBE_FCTRL_MPE;
3502 vmolr |= IXGBE_VMOLR_MPE;
3503 } else {
3504 /*
3505 * Write addresses to the MTA, if the attempt fails
3506 * then we should just turn on promiscuous mode so
3507 * that we can at least receive multicast traffic
3508 */
3509 hw->mac.ops.update_mc_addr_list(hw, netdev);
3510 vmolr |= IXGBE_VMOLR_ROMPE;
3511 }
3512 ixgbe_vlan_filter_enable(adapter);
3513 hw->addr_ctrl.user_set_promisc = false;
3514 }
3515
3516 /*
3517 * Write addresses to available RAR registers, if there is not
3518 * sufficient space to store all the addresses then enable
3519 * unicast promiscuous mode
3520 */
3521 count = ixgbe_write_uc_addr_list(netdev);
3522 if (count < 0) {
3523 fctrl |= IXGBE_FCTRL_UPE;
3524 vmolr |= IXGBE_VMOLR_ROPE;
3525 }
3526
3527 if (adapter->num_vfs) {
3528 ixgbe_restore_vf_multicasts(adapter);
3529 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(adapter->num_vfs)) &
3530 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
3531 IXGBE_VMOLR_ROPE);
3532 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(adapter->num_vfs), vmolr);
3533 }
3534
3535 /* This is useful for sniffing bad packets. */
3536 if (adapter->netdev->features & NETIF_F_RXALL) {
3537 /* UPE and MPE will be handled by normal PROMISC logic
3538 * in e1000e_set_rx_mode */
3539 fctrl |= (IXGBE_FCTRL_SBP | /* Receive bad packets */
3540 IXGBE_FCTRL_BAM | /* RX All Bcast Pkts */
3541 IXGBE_FCTRL_PMCF); /* RX All MAC Ctrl Pkts */
3542
3543 fctrl &= ~(IXGBE_FCTRL_DPF);
3544 /* NOTE: VLAN filtering is disabled by setting PROMISC */
3545 }
3546
3547 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
3548
3549 if (netdev->features & NETIF_F_HW_VLAN_RX)
3550 ixgbe_vlan_strip_enable(adapter);
3551 else
3552 ixgbe_vlan_strip_disable(adapter);
3553 }
3554
3555 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
3556 {
3557 int q_idx;
3558 struct ixgbe_q_vector *q_vector;
3559 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3560
3561 /* legacy and MSI only use one vector */
3562 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3563 q_vectors = 1;
3564
3565 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3566 q_vector = adapter->q_vector[q_idx];
3567 napi_enable(&q_vector->napi);
3568 }
3569 }
3570
3571 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
3572 {
3573 int q_idx;
3574 struct ixgbe_q_vector *q_vector;
3575 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3576
3577 /* legacy and MSI only use one vector */
3578 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3579 q_vectors = 1;
3580
3581 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3582 q_vector = adapter->q_vector[q_idx];
3583 napi_disable(&q_vector->napi);
3584 }
3585 }
3586
3587 #ifdef CONFIG_IXGBE_DCB
3588 /*
3589 * ixgbe_configure_dcb - Configure DCB hardware
3590 * @adapter: ixgbe adapter struct
3591 *
3592 * This is called by the driver on open to configure the DCB hardware.
3593 * This is also called by the gennetlink interface when reconfiguring
3594 * the DCB state.
3595 */
3596 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
3597 {
3598 struct ixgbe_hw *hw = &adapter->hw;
3599 int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3600
3601 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
3602 if (hw->mac.type == ixgbe_mac_82598EB)
3603 netif_set_gso_max_size(adapter->netdev, 65536);
3604 return;
3605 }
3606
3607 if (hw->mac.type == ixgbe_mac_82598EB)
3608 netif_set_gso_max_size(adapter->netdev, 32768);
3609
3610
3611 /* Enable VLAN tag insert/strip */
3612 adapter->netdev->features |= NETIF_F_HW_VLAN_RX;
3613
3614 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
3615
3616 #ifdef IXGBE_FCOE
3617 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
3618 max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
3619 #endif
3620
3621 /* reconfigure the hardware */
3622 if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE) {
3623 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3624 DCB_TX_CONFIG);
3625 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3626 DCB_RX_CONFIG);
3627 ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
3628 } else if (adapter->ixgbe_ieee_ets && adapter->ixgbe_ieee_pfc) {
3629 ixgbe_dcb_hw_ets(&adapter->hw,
3630 adapter->ixgbe_ieee_ets,
3631 max_frame);
3632 ixgbe_dcb_hw_pfc_config(&adapter->hw,
3633 adapter->ixgbe_ieee_pfc->pfc_en,
3634 adapter->ixgbe_ieee_ets->prio_tc);
3635 }
3636
3637 /* Enable RSS Hash per TC */
3638 if (hw->mac.type != ixgbe_mac_82598EB) {
3639 int i;
3640 u32 reg = 0;
3641
3642 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
3643 u8 msb = 0;
3644 u8 cnt = adapter->netdev->tc_to_txq[i].count;
3645
3646 while (cnt >>= 1)
3647 msb++;
3648
3649 reg |= msb << IXGBE_RQTC_SHIFT_TC(i);
3650 }
3651 IXGBE_WRITE_REG(hw, IXGBE_RQTC, reg);
3652 }
3653 }
3654 #endif
3655
3656 /* Additional bittime to account for IXGBE framing */
3657 #define IXGBE_ETH_FRAMING 20
3658
3659 /*
3660 * ixgbe_hpbthresh - calculate high water mark for flow control
3661 *
3662 * @adapter: board private structure to calculate for
3663 * @pb - packet buffer to calculate
3664 */
3665 static int ixgbe_hpbthresh(struct ixgbe_adapter *adapter, int pb)
3666 {
3667 struct ixgbe_hw *hw = &adapter->hw;
3668 struct net_device *dev = adapter->netdev;
3669 int link, tc, kb, marker;
3670 u32 dv_id, rx_pba;
3671
3672 /* Calculate max LAN frame size */
3673 tc = link = dev->mtu + ETH_HLEN + ETH_FCS_LEN + IXGBE_ETH_FRAMING;
3674
3675 #ifdef IXGBE_FCOE
3676 /* FCoE traffic class uses FCOE jumbo frames */
3677 if (dev->features & NETIF_F_FCOE_MTU) {
3678 int fcoe_pb = 0;
3679
3680 #ifdef CONFIG_IXGBE_DCB
3681 fcoe_pb = netdev_get_prio_tc_map(dev, adapter->fcoe.up);
3682
3683 #endif
3684 if (fcoe_pb == pb && tc < IXGBE_FCOE_JUMBO_FRAME_SIZE)
3685 tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
3686 }
3687 #endif
3688
3689 /* Calculate delay value for device */
3690 switch (hw->mac.type) {
3691 case ixgbe_mac_X540:
3692 dv_id = IXGBE_DV_X540(link, tc);
3693 break;
3694 default:
3695 dv_id = IXGBE_DV(link, tc);
3696 break;
3697 }
3698
3699 /* Loopback switch introduces additional latency */
3700 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3701 dv_id += IXGBE_B2BT(tc);
3702
3703 /* Delay value is calculated in bit times convert to KB */
3704 kb = IXGBE_BT2KB(dv_id);
3705 rx_pba = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(pb)) >> 10;
3706
3707 marker = rx_pba - kb;
3708
3709 /* It is possible that the packet buffer is not large enough
3710 * to provide required headroom. In this case throw an error
3711 * to user and a do the best we can.
3712 */
3713 if (marker < 0) {
3714 e_warn(drv, "Packet Buffer(%i) can not provide enough"
3715 "headroom to support flow control."
3716 "Decrease MTU or number of traffic classes\n", pb);
3717 marker = tc + 1;
3718 }
3719
3720 return marker;
3721 }
3722
3723 /*
3724 * ixgbe_lpbthresh - calculate low water mark for for flow control
3725 *
3726 * @adapter: board private structure to calculate for
3727 * @pb - packet buffer to calculate
3728 */
3729 static int ixgbe_lpbthresh(struct ixgbe_adapter *adapter)
3730 {
3731 struct ixgbe_hw *hw = &adapter->hw;
3732 struct net_device *dev = adapter->netdev;
3733 int tc;
3734 u32 dv_id;
3735
3736 /* Calculate max LAN frame size */
3737 tc = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
3738
3739 /* Calculate delay value for device */
3740 switch (hw->mac.type) {
3741 case ixgbe_mac_X540:
3742 dv_id = IXGBE_LOW_DV_X540(tc);
3743 break;
3744 default:
3745 dv_id = IXGBE_LOW_DV(tc);
3746 break;
3747 }
3748
3749 /* Delay value is calculated in bit times convert to KB */
3750 return IXGBE_BT2KB(dv_id);
3751 }
3752
3753 /*
3754 * ixgbe_pbthresh_setup - calculate and setup high low water marks
3755 */
3756 static void ixgbe_pbthresh_setup(struct ixgbe_adapter *adapter)
3757 {
3758 struct ixgbe_hw *hw = &adapter->hw;
3759 int num_tc = netdev_get_num_tc(adapter->netdev);
3760 int i;
3761
3762 if (!num_tc)
3763 num_tc = 1;
3764
3765 hw->fc.low_water = ixgbe_lpbthresh(adapter);
3766
3767 for (i = 0; i < num_tc; i++) {
3768 hw->fc.high_water[i] = ixgbe_hpbthresh(adapter, i);
3769
3770 /* Low water marks must not be larger than high water marks */
3771 if (hw->fc.low_water > hw->fc.high_water[i])
3772 hw->fc.low_water = 0;
3773 }
3774 }
3775
3776 static void ixgbe_configure_pb(struct ixgbe_adapter *adapter)
3777 {
3778 struct ixgbe_hw *hw = &adapter->hw;
3779 int hdrm;
3780 u8 tc = netdev_get_num_tc(adapter->netdev);
3781
3782 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3783 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
3784 hdrm = 32 << adapter->fdir_pballoc;
3785 else
3786 hdrm = 0;
3787
3788 hw->mac.ops.set_rxpba(hw, tc, hdrm, PBA_STRATEGY_EQUAL);
3789 ixgbe_pbthresh_setup(adapter);
3790 }
3791
3792 static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
3793 {
3794 struct ixgbe_hw *hw = &adapter->hw;
3795 struct hlist_node *node, *node2;
3796 struct ixgbe_fdir_filter *filter;
3797
3798 spin_lock(&adapter->fdir_perfect_lock);
3799
3800 if (!hlist_empty(&adapter->fdir_filter_list))
3801 ixgbe_fdir_set_input_mask_82599(hw, &adapter->fdir_mask);
3802
3803 hlist_for_each_entry_safe(filter, node, node2,
3804 &adapter->fdir_filter_list, fdir_node) {
3805 ixgbe_fdir_write_perfect_filter_82599(hw,
3806 &filter->filter,
3807 filter->sw_idx,
3808 (filter->action == IXGBE_FDIR_DROP_QUEUE) ?
3809 IXGBE_FDIR_DROP_QUEUE :
3810 adapter->rx_ring[filter->action]->reg_idx);
3811 }
3812
3813 spin_unlock(&adapter->fdir_perfect_lock);
3814 }
3815
3816 static void ixgbe_configure(struct ixgbe_adapter *adapter)
3817 {
3818 struct ixgbe_hw *hw = &adapter->hw;
3819
3820 ixgbe_configure_pb(adapter);
3821 #ifdef CONFIG_IXGBE_DCB
3822 ixgbe_configure_dcb(adapter);
3823 #endif
3824
3825 ixgbe_set_rx_mode(adapter->netdev);
3826 ixgbe_restore_vlan(adapter);
3827
3828 #ifdef IXGBE_FCOE
3829 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
3830 ixgbe_configure_fcoe(adapter);
3831
3832 #endif /* IXGBE_FCOE */
3833
3834 switch (hw->mac.type) {
3835 case ixgbe_mac_82599EB:
3836 case ixgbe_mac_X540:
3837 hw->mac.ops.disable_rx_buff(hw);
3838 break;
3839 default:
3840 break;
3841 }
3842
3843 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3844 ixgbe_init_fdir_signature_82599(&adapter->hw,
3845 adapter->fdir_pballoc);
3846 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
3847 ixgbe_init_fdir_perfect_82599(&adapter->hw,
3848 adapter->fdir_pballoc);
3849 ixgbe_fdir_filter_restore(adapter);
3850 }
3851
3852 switch (hw->mac.type) {
3853 case ixgbe_mac_82599EB:
3854 case ixgbe_mac_X540:
3855 hw->mac.ops.enable_rx_buff(hw);
3856 break;
3857 default:
3858 break;
3859 }
3860
3861 ixgbe_configure_virtualization(adapter);
3862
3863 ixgbe_configure_tx(adapter);
3864 ixgbe_configure_rx(adapter);
3865 }
3866
3867 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
3868 {
3869 switch (hw->phy.type) {
3870 case ixgbe_phy_sfp_avago:
3871 case ixgbe_phy_sfp_ftl:
3872 case ixgbe_phy_sfp_intel:
3873 case ixgbe_phy_sfp_unknown:
3874 case ixgbe_phy_sfp_passive_tyco:
3875 case ixgbe_phy_sfp_passive_unknown:
3876 case ixgbe_phy_sfp_active_unknown:
3877 case ixgbe_phy_sfp_ftl_active:
3878 return true;
3879 case ixgbe_phy_nl:
3880 if (hw->mac.type == ixgbe_mac_82598EB)
3881 return true;
3882 default:
3883 return false;
3884 }
3885 }
3886
3887 /**
3888 * ixgbe_sfp_link_config - set up SFP+ link
3889 * @adapter: pointer to private adapter struct
3890 **/
3891 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
3892 {
3893 /*
3894 * We are assuming the worst case scenario here, and that
3895 * is that an SFP was inserted/removed after the reset
3896 * but before SFP detection was enabled. As such the best
3897 * solution is to just start searching as soon as we start
3898 */
3899 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
3900 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
3901
3902 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
3903 }
3904
3905 /**
3906 * ixgbe_non_sfp_link_config - set up non-SFP+ link
3907 * @hw: pointer to private hardware struct
3908 *
3909 * Returns 0 on success, negative on failure
3910 **/
3911 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
3912 {
3913 u32 autoneg;
3914 bool negotiation, link_up = false;
3915 u32 ret = IXGBE_ERR_LINK_SETUP;
3916
3917 if (hw->mac.ops.check_link)
3918 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
3919
3920 if (ret)
3921 goto link_cfg_out;
3922
3923 autoneg = hw->phy.autoneg_advertised;
3924 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
3925 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg,
3926 &negotiation);
3927 if (ret)
3928 goto link_cfg_out;
3929
3930 if (hw->mac.ops.setup_link)
3931 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
3932 link_cfg_out:
3933 return ret;
3934 }
3935
3936 static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
3937 {
3938 struct ixgbe_hw *hw = &adapter->hw;
3939 u32 gpie = 0;
3940
3941 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3942 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
3943 IXGBE_GPIE_OCD;
3944 gpie |= IXGBE_GPIE_EIAME;
3945 /*
3946 * use EIAM to auto-mask when MSI-X interrupt is asserted
3947 * this saves a register write for every interrupt
3948 */
3949 switch (hw->mac.type) {
3950 case ixgbe_mac_82598EB:
3951 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3952 break;
3953 case ixgbe_mac_82599EB:
3954 case ixgbe_mac_X540:
3955 default:
3956 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
3957 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
3958 break;
3959 }
3960 } else {
3961 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
3962 * specifically only auto mask tx and rx interrupts */
3963 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3964 }
3965
3966 /* XXX: to interrupt immediately for EICS writes, enable this */
3967 /* gpie |= IXGBE_GPIE_EIMEN; */
3968
3969 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3970 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
3971 gpie |= IXGBE_GPIE_VTMODE_64;
3972 }
3973
3974 /* Enable Thermal over heat sensor interrupt */
3975 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
3976 switch (adapter->hw.mac.type) {
3977 case ixgbe_mac_82599EB:
3978 gpie |= IXGBE_SDP0_GPIEN;
3979 break;
3980 case ixgbe_mac_X540:
3981 gpie |= IXGBE_EIMS_TS;
3982 break;
3983 default:
3984 break;
3985 }
3986 }
3987
3988 /* Enable fan failure interrupt */
3989 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
3990 gpie |= IXGBE_SDP1_GPIEN;
3991
3992 if (hw->mac.type == ixgbe_mac_82599EB) {
3993 gpie |= IXGBE_SDP1_GPIEN;
3994 gpie |= IXGBE_SDP2_GPIEN;
3995 }
3996
3997 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3998 }
3999
4000 static void ixgbe_up_complete(struct ixgbe_adapter *adapter)
4001 {
4002 struct ixgbe_hw *hw = &adapter->hw;
4003 int err;
4004 u32 ctrl_ext;
4005
4006 ixgbe_get_hw_control(adapter);
4007 ixgbe_setup_gpie(adapter);
4008
4009 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4010 ixgbe_configure_msix(adapter);
4011 else
4012 ixgbe_configure_msi_and_legacy(adapter);
4013
4014 /* enable the optics for both mult-speed fiber and 82599 SFP+ fiber */
4015 if (hw->mac.ops.enable_tx_laser &&
4016 ((hw->phy.multispeed_fiber) ||
4017 ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
4018 (hw->mac.type == ixgbe_mac_82599EB))))
4019 hw->mac.ops.enable_tx_laser(hw);
4020
4021 clear_bit(__IXGBE_DOWN, &adapter->state);
4022 ixgbe_napi_enable_all(adapter);
4023
4024 if (ixgbe_is_sfp(hw)) {
4025 ixgbe_sfp_link_config(adapter);
4026 } else {
4027 err = ixgbe_non_sfp_link_config(hw);
4028 if (err)
4029 e_err(probe, "link_config FAILED %d\n", err);
4030 }
4031
4032 /* clear any pending interrupts, may auto mask */
4033 IXGBE_READ_REG(hw, IXGBE_EICR);
4034 ixgbe_irq_enable(adapter, true, true);
4035
4036 /*
4037 * If this adapter has a fan, check to see if we had a failure
4038 * before we enabled the interrupt.
4039 */
4040 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
4041 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
4042 if (esdp & IXGBE_ESDP_SDP1)
4043 e_crit(drv, "Fan has stopped, replace the adapter\n");
4044 }
4045
4046 /* enable transmits */
4047 netif_tx_start_all_queues(adapter->netdev);
4048
4049 /* bring the link up in the watchdog, this could race with our first
4050 * link up interrupt but shouldn't be a problem */
4051 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
4052 adapter->link_check_timeout = jiffies;
4053 mod_timer(&adapter->service_timer, jiffies);
4054
4055 /* Set PF Reset Done bit so PF/VF Mail Ops can work */
4056 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
4057 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
4058 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
4059 }
4060
4061 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
4062 {
4063 WARN_ON(in_interrupt());
4064 /* put off any impending NetWatchDogTimeout */
4065 adapter->netdev->trans_start = jiffies;
4066
4067 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
4068 usleep_range(1000, 2000);
4069 ixgbe_down(adapter);
4070 /*
4071 * If SR-IOV enabled then wait a bit before bringing the adapter
4072 * back up to give the VFs time to respond to the reset. The
4073 * two second wait is based upon the watchdog timer cycle in
4074 * the VF driver.
4075 */
4076 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4077 msleep(2000);
4078 ixgbe_up(adapter);
4079 clear_bit(__IXGBE_RESETTING, &adapter->state);
4080 }
4081
4082 void ixgbe_up(struct ixgbe_adapter *adapter)
4083 {
4084 /* hardware has been reset, we need to reload some things */
4085 ixgbe_configure(adapter);
4086
4087 ixgbe_up_complete(adapter);
4088 }
4089
4090 void ixgbe_reset(struct ixgbe_adapter *adapter)
4091 {
4092 struct ixgbe_hw *hw = &adapter->hw;
4093 int err;
4094
4095 /* lock SFP init bit to prevent race conditions with the watchdog */
4096 while (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
4097 usleep_range(1000, 2000);
4098
4099 /* clear all SFP and link config related flags while holding SFP_INIT */
4100 adapter->flags2 &= ~(IXGBE_FLAG2_SEARCH_FOR_SFP |
4101 IXGBE_FLAG2_SFP_NEEDS_RESET);
4102 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
4103
4104 err = hw->mac.ops.init_hw(hw);
4105 switch (err) {
4106 case 0:
4107 case IXGBE_ERR_SFP_NOT_PRESENT:
4108 case IXGBE_ERR_SFP_NOT_SUPPORTED:
4109 break;
4110 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
4111 e_dev_err("master disable timed out\n");
4112 break;
4113 case IXGBE_ERR_EEPROM_VERSION:
4114 /* We are running on a pre-production device, log a warning */
4115 e_dev_warn("This device is a pre-production adapter/LOM. "
4116 "Please be aware there may be issues associated with "
4117 "your hardware. If you are experiencing problems "
4118 "please contact your Intel or hardware "
4119 "representative who provided you with this "
4120 "hardware.\n");
4121 break;
4122 default:
4123 e_dev_err("Hardware Error: %d\n", err);
4124 }
4125
4126 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
4127
4128 /* reprogram the RAR[0] in case user changed it. */
4129 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
4130 IXGBE_RAH_AV);
4131 }
4132
4133 /**
4134 * ixgbe_init_rx_page_offset - initialize page offset values for Rx buffers
4135 * @rx_ring: ring to setup
4136 *
4137 * On many IA platforms the L1 cache has a critical stride of 4K, this
4138 * results in each receive buffer starting in the same cache set. To help
4139 * reduce the pressure on this cache set we can interleave the offsets so
4140 * that only every other buffer will be in the same cache set.
4141 **/
4142 static void ixgbe_init_rx_page_offset(struct ixgbe_ring *rx_ring)
4143 {
4144 struct ixgbe_rx_buffer *rx_buffer = rx_ring->rx_buffer_info;
4145 u16 i;
4146
4147 for (i = 0; i < rx_ring->count; i += 2) {
4148 rx_buffer[0].page_offset = 0;
4149 rx_buffer[1].page_offset = ixgbe_rx_bufsz(rx_ring);
4150 rx_buffer = &rx_buffer[2];
4151 }
4152 }
4153
4154 /**
4155 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
4156 * @rx_ring: ring to free buffers from
4157 **/
4158 static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring)
4159 {
4160 struct device *dev = rx_ring->dev;
4161 unsigned long size;
4162 u16 i;
4163
4164 /* ring already cleared, nothing to do */
4165 if (!rx_ring->rx_buffer_info)
4166 return;
4167
4168 /* Free all the Rx ring sk_buffs */
4169 for (i = 0; i < rx_ring->count; i++) {
4170 struct ixgbe_rx_buffer *rx_buffer;
4171
4172 rx_buffer = &rx_ring->rx_buffer_info[i];
4173 if (rx_buffer->skb) {
4174 struct sk_buff *skb = rx_buffer->skb;
4175 if (IXGBE_CB(skb)->page_released) {
4176 dma_unmap_page(dev,
4177 IXGBE_CB(skb)->dma,
4178 ixgbe_rx_bufsz(rx_ring),
4179 DMA_FROM_DEVICE);
4180 IXGBE_CB(skb)->page_released = false;
4181 }
4182 dev_kfree_skb(skb);
4183 }
4184 rx_buffer->skb = NULL;
4185 if (rx_buffer->dma)
4186 dma_unmap_page(dev, rx_buffer->dma,
4187 ixgbe_rx_pg_size(rx_ring),
4188 DMA_FROM_DEVICE);
4189 rx_buffer->dma = 0;
4190 if (rx_buffer->page)
4191 __free_pages(rx_buffer->page,
4192 ixgbe_rx_pg_order(rx_ring));
4193 rx_buffer->page = NULL;
4194 }
4195
4196 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4197 memset(rx_ring->rx_buffer_info, 0, size);
4198
4199 ixgbe_init_rx_page_offset(rx_ring);
4200
4201 /* Zero out the descriptor ring */
4202 memset(rx_ring->desc, 0, rx_ring->size);
4203
4204 rx_ring->next_to_alloc = 0;
4205 rx_ring->next_to_clean = 0;
4206 rx_ring->next_to_use = 0;
4207 }
4208
4209 /**
4210 * ixgbe_clean_tx_ring - Free Tx Buffers
4211 * @tx_ring: ring to be cleaned
4212 **/
4213 static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
4214 {
4215 struct ixgbe_tx_buffer *tx_buffer_info;
4216 unsigned long size;
4217 u16 i;
4218
4219 /* ring already cleared, nothing to do */
4220 if (!tx_ring->tx_buffer_info)
4221 return;
4222
4223 /* Free all the Tx ring sk_buffs */
4224 for (i = 0; i < tx_ring->count; i++) {
4225 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4226 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
4227 }
4228
4229 netdev_tx_reset_queue(txring_txq(tx_ring));
4230
4231 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
4232 memset(tx_ring->tx_buffer_info, 0, size);
4233
4234 /* Zero out the descriptor ring */
4235 memset(tx_ring->desc, 0, tx_ring->size);
4236
4237 tx_ring->next_to_use = 0;
4238 tx_ring->next_to_clean = 0;
4239 }
4240
4241 /**
4242 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
4243 * @adapter: board private structure
4244 **/
4245 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
4246 {
4247 int i;
4248
4249 for (i = 0; i < adapter->num_rx_queues; i++)
4250 ixgbe_clean_rx_ring(adapter->rx_ring[i]);
4251 }
4252
4253 /**
4254 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
4255 * @adapter: board private structure
4256 **/
4257 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
4258 {
4259 int i;
4260
4261 for (i = 0; i < adapter->num_tx_queues; i++)
4262 ixgbe_clean_tx_ring(adapter->tx_ring[i]);
4263 }
4264
4265 static void ixgbe_fdir_filter_exit(struct ixgbe_adapter *adapter)
4266 {
4267 struct hlist_node *node, *node2;
4268 struct ixgbe_fdir_filter *filter;
4269
4270 spin_lock(&adapter->fdir_perfect_lock);
4271
4272 hlist_for_each_entry_safe(filter, node, node2,
4273 &adapter->fdir_filter_list, fdir_node) {
4274 hlist_del(&filter->fdir_node);
4275 kfree(filter);
4276 }
4277 adapter->fdir_filter_count = 0;
4278
4279 spin_unlock(&adapter->fdir_perfect_lock);
4280 }
4281
4282 void ixgbe_down(struct ixgbe_adapter *adapter)
4283 {
4284 struct net_device *netdev = adapter->netdev;
4285 struct ixgbe_hw *hw = &adapter->hw;
4286 u32 rxctrl;
4287 int i;
4288
4289 /* signal that we are down to the interrupt handler */
4290 set_bit(__IXGBE_DOWN, &adapter->state);
4291
4292 /* disable receives */
4293 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
4294 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
4295
4296 /* disable all enabled rx queues */
4297 for (i = 0; i < adapter->num_rx_queues; i++)
4298 /* this call also flushes the previous write */
4299 ixgbe_disable_rx_queue(adapter, adapter->rx_ring[i]);
4300
4301 usleep_range(10000, 20000);
4302
4303 netif_tx_stop_all_queues(netdev);
4304
4305 /* call carrier off first to avoid false dev_watchdog timeouts */
4306 netif_carrier_off(netdev);
4307 netif_tx_disable(netdev);
4308
4309 ixgbe_irq_disable(adapter);
4310
4311 ixgbe_napi_disable_all(adapter);
4312
4313 adapter->flags2 &= ~(IXGBE_FLAG2_FDIR_REQUIRES_REINIT |
4314 IXGBE_FLAG2_RESET_REQUESTED);
4315 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
4316
4317 del_timer_sync(&adapter->service_timer);
4318
4319 if (adapter->num_vfs) {
4320 /* Clear EITR Select mapping */
4321 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
4322
4323 /* Mark all the VFs as inactive */
4324 for (i = 0 ; i < adapter->num_vfs; i++)
4325 adapter->vfinfo[i].clear_to_send = false;
4326
4327 /* ping all the active vfs to let them know we are going down */
4328 ixgbe_ping_all_vfs(adapter);
4329
4330 /* Disable all VFTE/VFRE TX/RX */
4331 ixgbe_disable_tx_rx(adapter);
4332 }
4333
4334 /* disable transmits in the hardware now that interrupts are off */
4335 for (i = 0; i < adapter->num_tx_queues; i++) {
4336 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
4337 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
4338 }
4339
4340 /* Disable the Tx DMA engine on 82599 and X540 */
4341 switch (hw->mac.type) {
4342 case ixgbe_mac_82599EB:
4343 case ixgbe_mac_X540:
4344 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
4345 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
4346 ~IXGBE_DMATXCTL_TE));
4347 break;
4348 default:
4349 break;
4350 }
4351
4352 if (!pci_channel_offline(adapter->pdev))
4353 ixgbe_reset(adapter);
4354
4355 /* power down the optics for multispeed fiber and 82599 SFP+ fiber */
4356 if (hw->mac.ops.disable_tx_laser &&
4357 ((hw->phy.multispeed_fiber) ||
4358 ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
4359 (hw->mac.type == ixgbe_mac_82599EB))))
4360 hw->mac.ops.disable_tx_laser(hw);
4361
4362 ixgbe_clean_all_tx_rings(adapter);
4363 ixgbe_clean_all_rx_rings(adapter);
4364
4365 #ifdef CONFIG_IXGBE_DCA
4366 /* since we reset the hardware DCA settings were cleared */
4367 ixgbe_setup_dca(adapter);
4368 #endif
4369 }
4370
4371 /**
4372 * ixgbe_tx_timeout - Respond to a Tx Hang
4373 * @netdev: network interface device structure
4374 **/
4375 static void ixgbe_tx_timeout(struct net_device *netdev)
4376 {
4377 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4378
4379 /* Do the reset outside of interrupt context */
4380 ixgbe_tx_timeout_reset(adapter);
4381 }
4382
4383 /**
4384 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
4385 * @adapter: board private structure to initialize
4386 *
4387 * ixgbe_sw_init initializes the Adapter private data structure.
4388 * Fields are initialized based on PCI device information and
4389 * OS network device settings (MTU size).
4390 **/
4391 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
4392 {
4393 struct ixgbe_hw *hw = &adapter->hw;
4394 struct pci_dev *pdev = adapter->pdev;
4395 unsigned int rss;
4396 #ifdef CONFIG_IXGBE_DCB
4397 int j;
4398 struct tc_configuration *tc;
4399 #endif
4400
4401 /* PCI config space info */
4402
4403 hw->vendor_id = pdev->vendor;
4404 hw->device_id = pdev->device;
4405 hw->revision_id = pdev->revision;
4406 hw->subsystem_vendor_id = pdev->subsystem_vendor;
4407 hw->subsystem_device_id = pdev->subsystem_device;
4408
4409 /* Set capability flags */
4410 rss = min_t(int, IXGBE_MAX_RSS_INDICES, num_online_cpus());
4411 adapter->ring_feature[RING_F_RSS].indices = rss;
4412 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
4413 switch (hw->mac.type) {
4414 case ixgbe_mac_82598EB:
4415 if (hw->device_id == IXGBE_DEV_ID_82598AT)
4416 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
4417 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
4418 break;
4419 case ixgbe_mac_X540:
4420 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
4421 case ixgbe_mac_82599EB:
4422 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
4423 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
4424 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
4425 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
4426 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
4427 /* Flow Director hash filters enabled */
4428 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
4429 adapter->atr_sample_rate = 20;
4430 adapter->ring_feature[RING_F_FDIR].indices =
4431 IXGBE_MAX_FDIR_INDICES;
4432 adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_64K;
4433 #ifdef IXGBE_FCOE
4434 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
4435 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
4436 adapter->ring_feature[RING_F_FCOE].indices = 0;
4437 #ifdef CONFIG_IXGBE_DCB
4438 /* Default traffic class to use for FCoE */
4439 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
4440 #endif
4441 #endif /* IXGBE_FCOE */
4442 break;
4443 default:
4444 break;
4445 }
4446
4447 /* n-tuple support exists, always init our spinlock */
4448 spin_lock_init(&adapter->fdir_perfect_lock);
4449
4450 #ifdef CONFIG_IXGBE_DCB
4451 switch (hw->mac.type) {
4452 case ixgbe_mac_X540:
4453 adapter->dcb_cfg.num_tcs.pg_tcs = X540_TRAFFIC_CLASS;
4454 adapter->dcb_cfg.num_tcs.pfc_tcs = X540_TRAFFIC_CLASS;
4455 break;
4456 default:
4457 adapter->dcb_cfg.num_tcs.pg_tcs = MAX_TRAFFIC_CLASS;
4458 adapter->dcb_cfg.num_tcs.pfc_tcs = MAX_TRAFFIC_CLASS;
4459 break;
4460 }
4461
4462 /* Configure DCB traffic classes */
4463 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
4464 tc = &adapter->dcb_cfg.tc_config[j];
4465 tc->path[DCB_TX_CONFIG].bwg_id = 0;
4466 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
4467 tc->path[DCB_RX_CONFIG].bwg_id = 0;
4468 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
4469 tc->dcb_pfc = pfc_disabled;
4470 }
4471
4472 /* Initialize default user to priority mapping, UPx->TC0 */
4473 tc = &adapter->dcb_cfg.tc_config[0];
4474 tc->path[DCB_TX_CONFIG].up_to_tc_bitmap = 0xFF;
4475 tc->path[DCB_RX_CONFIG].up_to_tc_bitmap = 0xFF;
4476
4477 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
4478 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
4479 adapter->dcb_cfg.pfc_mode_enable = false;
4480 adapter->dcb_set_bitmap = 0x00;
4481 adapter->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE;
4482 memcpy(&adapter->temp_dcb_cfg, &adapter->dcb_cfg,
4483 sizeof(adapter->temp_dcb_cfg));
4484
4485 #endif
4486
4487 /* default flow control settings */
4488 hw->fc.requested_mode = ixgbe_fc_full;
4489 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
4490 ixgbe_pbthresh_setup(adapter);
4491 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
4492 hw->fc.send_xon = true;
4493 hw->fc.disable_fc_autoneg = false;
4494
4495 /* enable itr by default in dynamic mode */
4496 adapter->rx_itr_setting = 1;
4497 adapter->tx_itr_setting = 1;
4498
4499 /* set default ring sizes */
4500 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
4501 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
4502
4503 /* set default work limits */
4504 adapter->tx_work_limit = IXGBE_DEFAULT_TX_WORK;
4505
4506 /* initialize eeprom parameters */
4507 if (ixgbe_init_eeprom_params_generic(hw)) {
4508 e_dev_err("EEPROM initialization failed\n");
4509 return -EIO;
4510 }
4511
4512 set_bit(__IXGBE_DOWN, &adapter->state);
4513
4514 return 0;
4515 }
4516
4517 /**
4518 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
4519 * @tx_ring: tx descriptor ring (for a specific queue) to setup
4520 *
4521 * Return 0 on success, negative on failure
4522 **/
4523 int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
4524 {
4525 struct device *dev = tx_ring->dev;
4526 int orig_node = dev_to_node(dev);
4527 int numa_node = -1;
4528 int size;
4529
4530 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
4531
4532 if (tx_ring->q_vector)
4533 numa_node = tx_ring->q_vector->numa_node;
4534
4535 tx_ring->tx_buffer_info = vzalloc_node(size, numa_node);
4536 if (!tx_ring->tx_buffer_info)
4537 tx_ring->tx_buffer_info = vzalloc(size);
4538 if (!tx_ring->tx_buffer_info)
4539 goto err;
4540
4541 /* round up to nearest 4K */
4542 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
4543 tx_ring->size = ALIGN(tx_ring->size, 4096);
4544
4545 set_dev_node(dev, numa_node);
4546 tx_ring->desc = dma_alloc_coherent(dev,
4547 tx_ring->size,
4548 &tx_ring->dma,
4549 GFP_KERNEL);
4550 set_dev_node(dev, orig_node);
4551 if (!tx_ring->desc)
4552 tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
4553 &tx_ring->dma, GFP_KERNEL);
4554 if (!tx_ring->desc)
4555 goto err;
4556
4557 tx_ring->next_to_use = 0;
4558 tx_ring->next_to_clean = 0;
4559 return 0;
4560
4561 err:
4562 vfree(tx_ring->tx_buffer_info);
4563 tx_ring->tx_buffer_info = NULL;
4564 dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n");
4565 return -ENOMEM;
4566 }
4567
4568 /**
4569 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
4570 * @adapter: board private structure
4571 *
4572 * If this function returns with an error, then it's possible one or
4573 * more of the rings is populated (while the rest are not). It is the
4574 * callers duty to clean those orphaned rings.
4575 *
4576 * Return 0 on success, negative on failure
4577 **/
4578 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
4579 {
4580 int i, err = 0;
4581
4582 for (i = 0; i < adapter->num_tx_queues; i++) {
4583 err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
4584 if (!err)
4585 continue;
4586 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
4587 break;
4588 }
4589
4590 return err;
4591 }
4592
4593 /**
4594 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
4595 * @rx_ring: rx descriptor ring (for a specific queue) to setup
4596 *
4597 * Returns 0 on success, negative on failure
4598 **/
4599 int ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring)
4600 {
4601 struct device *dev = rx_ring->dev;
4602 int orig_node = dev_to_node(dev);
4603 int numa_node = -1;
4604 int size;
4605
4606 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4607
4608 if (rx_ring->q_vector)
4609 numa_node = rx_ring->q_vector->numa_node;
4610
4611 rx_ring->rx_buffer_info = vzalloc_node(size, numa_node);
4612 if (!rx_ring->rx_buffer_info)
4613 rx_ring->rx_buffer_info = vzalloc(size);
4614 if (!rx_ring->rx_buffer_info)
4615 goto err;
4616
4617 /* Round up to nearest 4K */
4618 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
4619 rx_ring->size = ALIGN(rx_ring->size, 4096);
4620
4621 set_dev_node(dev, numa_node);
4622 rx_ring->desc = dma_alloc_coherent(dev,
4623 rx_ring->size,
4624 &rx_ring->dma,
4625 GFP_KERNEL);
4626 set_dev_node(dev, orig_node);
4627 if (!rx_ring->desc)
4628 rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
4629 &rx_ring->dma, GFP_KERNEL);
4630 if (!rx_ring->desc)
4631 goto err;
4632
4633 rx_ring->next_to_clean = 0;
4634 rx_ring->next_to_use = 0;
4635
4636 ixgbe_init_rx_page_offset(rx_ring);
4637
4638 return 0;
4639 err:
4640 vfree(rx_ring->rx_buffer_info);
4641 rx_ring->rx_buffer_info = NULL;
4642 dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");
4643 return -ENOMEM;
4644 }
4645
4646 /**
4647 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
4648 * @adapter: board private structure
4649 *
4650 * If this function returns with an error, then it's possible one or
4651 * more of the rings is populated (while the rest are not). It is the
4652 * callers duty to clean those orphaned rings.
4653 *
4654 * Return 0 on success, negative on failure
4655 **/
4656 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
4657 {
4658 int i, err = 0;
4659
4660 for (i = 0; i < adapter->num_rx_queues; i++) {
4661 err = ixgbe_setup_rx_resources(adapter->rx_ring[i]);
4662 if (!err)
4663 continue;
4664 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
4665 break;
4666 }
4667
4668 return err;
4669 }
4670
4671 /**
4672 * ixgbe_free_tx_resources - Free Tx Resources per Queue
4673 * @tx_ring: Tx descriptor ring for a specific queue
4674 *
4675 * Free all transmit software resources
4676 **/
4677 void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring)
4678 {
4679 ixgbe_clean_tx_ring(tx_ring);
4680
4681 vfree(tx_ring->tx_buffer_info);
4682 tx_ring->tx_buffer_info = NULL;
4683
4684 /* if not set, then don't free */
4685 if (!tx_ring->desc)
4686 return;
4687
4688 dma_free_coherent(tx_ring->dev, tx_ring->size,
4689 tx_ring->desc, tx_ring->dma);
4690
4691 tx_ring->desc = NULL;
4692 }
4693
4694 /**
4695 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
4696 * @adapter: board private structure
4697 *
4698 * Free all transmit software resources
4699 **/
4700 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
4701 {
4702 int i;
4703
4704 for (i = 0; i < adapter->num_tx_queues; i++)
4705 if (adapter->tx_ring[i]->desc)
4706 ixgbe_free_tx_resources(adapter->tx_ring[i]);
4707 }
4708
4709 /**
4710 * ixgbe_free_rx_resources - Free Rx Resources
4711 * @rx_ring: ring to clean the resources from
4712 *
4713 * Free all receive software resources
4714 **/
4715 void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring)
4716 {
4717 ixgbe_clean_rx_ring(rx_ring);
4718
4719 vfree(rx_ring->rx_buffer_info);
4720 rx_ring->rx_buffer_info = NULL;
4721
4722 /* if not set, then don't free */
4723 if (!rx_ring->desc)
4724 return;
4725
4726 dma_free_coherent(rx_ring->dev, rx_ring->size,
4727 rx_ring->desc, rx_ring->dma);
4728
4729 rx_ring->desc = NULL;
4730 }
4731
4732 /**
4733 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
4734 * @adapter: board private structure
4735 *
4736 * Free all receive software resources
4737 **/
4738 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
4739 {
4740 int i;
4741
4742 for (i = 0; i < adapter->num_rx_queues; i++)
4743 if (adapter->rx_ring[i]->desc)
4744 ixgbe_free_rx_resources(adapter->rx_ring[i]);
4745 }
4746
4747 /**
4748 * ixgbe_change_mtu - Change the Maximum Transfer Unit
4749 * @netdev: network interface device structure
4750 * @new_mtu: new value for maximum frame size
4751 *
4752 * Returns 0 on success, negative on failure
4753 **/
4754 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
4755 {
4756 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4757 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4758
4759 /* MTU < 68 is an error and causes problems on some kernels */
4760 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
4761 return -EINVAL;
4762
4763 /*
4764 * For 82599EB we cannot allow PF to change MTU greater than 1500
4765 * in SR-IOV mode as it may cause buffer overruns in guest VFs that
4766 * don't allocate and chain buffers correctly.
4767 */
4768 if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) &&
4769 (adapter->hw.mac.type == ixgbe_mac_82599EB) &&
4770 (max_frame > MAXIMUM_ETHERNET_VLAN_SIZE))
4771 return -EINVAL;
4772
4773 e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
4774
4775 /* must set new MTU before calling down or up */
4776 netdev->mtu = new_mtu;
4777
4778 if (netif_running(netdev))
4779 ixgbe_reinit_locked(adapter);
4780
4781 return 0;
4782 }
4783
4784 /**
4785 * ixgbe_open - Called when a network interface is made active
4786 * @netdev: network interface device structure
4787 *
4788 * Returns 0 on success, negative value on failure
4789 *
4790 * The open entry point is called when a network interface is made
4791 * active by the system (IFF_UP). At this point all resources needed
4792 * for transmit and receive operations are allocated, the interrupt
4793 * handler is registered with the OS, the watchdog timer is started,
4794 * and the stack is notified that the interface is ready.
4795 **/
4796 static int ixgbe_open(struct net_device *netdev)
4797 {
4798 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4799 int err;
4800
4801 /* disallow open during test */
4802 if (test_bit(__IXGBE_TESTING, &adapter->state))
4803 return -EBUSY;
4804
4805 netif_carrier_off(netdev);
4806
4807 /* allocate transmit descriptors */
4808 err = ixgbe_setup_all_tx_resources(adapter);
4809 if (err)
4810 goto err_setup_tx;
4811
4812 /* allocate receive descriptors */
4813 err = ixgbe_setup_all_rx_resources(adapter);
4814 if (err)
4815 goto err_setup_rx;
4816
4817 ixgbe_configure(adapter);
4818
4819 err = ixgbe_request_irq(adapter);
4820 if (err)
4821 goto err_req_irq;
4822
4823 ixgbe_up_complete(adapter);
4824
4825 return 0;
4826
4827 err_req_irq:
4828 err_setup_rx:
4829 ixgbe_free_all_rx_resources(adapter);
4830 err_setup_tx:
4831 ixgbe_free_all_tx_resources(adapter);
4832 ixgbe_reset(adapter);
4833
4834 return err;
4835 }
4836
4837 /**
4838 * ixgbe_close - Disables a network interface
4839 * @netdev: network interface device structure
4840 *
4841 * Returns 0, this is not allowed to fail
4842 *
4843 * The close entry point is called when an interface is de-activated
4844 * by the OS. The hardware is still under the drivers control, but
4845 * needs to be disabled. A global MAC reset is issued to stop the
4846 * hardware, and all transmit and receive resources are freed.
4847 **/
4848 static int ixgbe_close(struct net_device *netdev)
4849 {
4850 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4851
4852 ixgbe_down(adapter);
4853 ixgbe_free_irq(adapter);
4854
4855 ixgbe_fdir_filter_exit(adapter);
4856
4857 ixgbe_free_all_tx_resources(adapter);
4858 ixgbe_free_all_rx_resources(adapter);
4859
4860 ixgbe_release_hw_control(adapter);
4861
4862 return 0;
4863 }
4864
4865 #ifdef CONFIG_PM
4866 static int ixgbe_resume(struct pci_dev *pdev)
4867 {
4868 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
4869 struct net_device *netdev = adapter->netdev;
4870 u32 err;
4871
4872 pci_set_power_state(pdev, PCI_D0);
4873 pci_restore_state(pdev);
4874 /*
4875 * pci_restore_state clears dev->state_saved so call
4876 * pci_save_state to restore it.
4877 */
4878 pci_save_state(pdev);
4879
4880 err = pci_enable_device_mem(pdev);
4881 if (err) {
4882 e_dev_err("Cannot enable PCI device from suspend\n");
4883 return err;
4884 }
4885 pci_set_master(pdev);
4886
4887 pci_wake_from_d3(pdev, false);
4888
4889 rtnl_lock();
4890 err = ixgbe_init_interrupt_scheme(adapter);
4891 rtnl_unlock();
4892 if (err) {
4893 e_dev_err("Cannot initialize interrupts for device\n");
4894 return err;
4895 }
4896
4897 ixgbe_reset(adapter);
4898
4899 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
4900
4901 if (netif_running(netdev)) {
4902 err = ixgbe_open(netdev);
4903 if (err)
4904 return err;
4905 }
4906
4907 netif_device_attach(netdev);
4908
4909 return 0;
4910 }
4911 #endif /* CONFIG_PM */
4912
4913 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
4914 {
4915 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
4916 struct net_device *netdev = adapter->netdev;
4917 struct ixgbe_hw *hw = &adapter->hw;
4918 u32 ctrl, fctrl;
4919 u32 wufc = adapter->wol;
4920 #ifdef CONFIG_PM
4921 int retval = 0;
4922 #endif
4923
4924 netif_device_detach(netdev);
4925
4926 if (netif_running(netdev)) {
4927 rtnl_lock();
4928 ixgbe_down(adapter);
4929 ixgbe_free_irq(adapter);
4930 ixgbe_free_all_tx_resources(adapter);
4931 ixgbe_free_all_rx_resources(adapter);
4932 rtnl_unlock();
4933 }
4934
4935 ixgbe_clear_interrupt_scheme(adapter);
4936
4937 #ifdef CONFIG_PM
4938 retval = pci_save_state(pdev);
4939 if (retval)
4940 return retval;
4941
4942 #endif
4943 if (wufc) {
4944 ixgbe_set_rx_mode(netdev);
4945
4946 /*
4947 * enable the optics for both mult-speed fiber and
4948 * 82599 SFP+ fiber as we can WoL.
4949 */
4950 if (hw->mac.ops.enable_tx_laser &&
4951 (hw->phy.multispeed_fiber ||
4952 (hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber &&
4953 hw->mac.type == ixgbe_mac_82599EB)))
4954 hw->mac.ops.enable_tx_laser(hw);
4955
4956 /* turn on all-multi mode if wake on multicast is enabled */
4957 if (wufc & IXGBE_WUFC_MC) {
4958 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4959 fctrl |= IXGBE_FCTRL_MPE;
4960 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
4961 }
4962
4963 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
4964 ctrl |= IXGBE_CTRL_GIO_DIS;
4965 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
4966
4967 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
4968 } else {
4969 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
4970 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
4971 }
4972
4973 switch (hw->mac.type) {
4974 case ixgbe_mac_82598EB:
4975 pci_wake_from_d3(pdev, false);
4976 break;
4977 case ixgbe_mac_82599EB:
4978 case ixgbe_mac_X540:
4979 pci_wake_from_d3(pdev, !!wufc);
4980 break;
4981 default:
4982 break;
4983 }
4984
4985 *enable_wake = !!wufc;
4986
4987 ixgbe_release_hw_control(adapter);
4988
4989 pci_disable_device(pdev);
4990
4991 return 0;
4992 }
4993
4994 #ifdef CONFIG_PM
4995 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
4996 {
4997 int retval;
4998 bool wake;
4999
5000 retval = __ixgbe_shutdown(pdev, &wake);
5001 if (retval)
5002 return retval;
5003
5004 if (wake) {
5005 pci_prepare_to_sleep(pdev);
5006 } else {
5007 pci_wake_from_d3(pdev, false);
5008 pci_set_power_state(pdev, PCI_D3hot);
5009 }
5010
5011 return 0;
5012 }
5013 #endif /* CONFIG_PM */
5014
5015 static void ixgbe_shutdown(struct pci_dev *pdev)
5016 {
5017 bool wake;
5018
5019 __ixgbe_shutdown(pdev, &wake);
5020
5021 if (system_state == SYSTEM_POWER_OFF) {
5022 pci_wake_from_d3(pdev, wake);
5023 pci_set_power_state(pdev, PCI_D3hot);
5024 }
5025 }
5026
5027 /**
5028 * ixgbe_update_stats - Update the board statistics counters.
5029 * @adapter: board private structure
5030 **/
5031 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
5032 {
5033 struct net_device *netdev = adapter->netdev;
5034 struct ixgbe_hw *hw = &adapter->hw;
5035 struct ixgbe_hw_stats *hwstats = &adapter->stats;
5036 u64 total_mpc = 0;
5037 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
5038 u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
5039 u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
5040 u64 bytes = 0, packets = 0, hw_csum_rx_error = 0;
5041 #ifdef IXGBE_FCOE
5042 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
5043 unsigned int cpu;
5044 u64 fcoe_noddp_counts_sum = 0, fcoe_noddp_ext_buff_counts_sum = 0;
5045 #endif /* IXGBE_FCOE */
5046
5047 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5048 test_bit(__IXGBE_RESETTING, &adapter->state))
5049 return;
5050
5051 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
5052 u64 rsc_count = 0;
5053 u64 rsc_flush = 0;
5054 for (i = 0; i < adapter->num_rx_queues; i++) {
5055 rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
5056 rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
5057 }
5058 adapter->rsc_total_count = rsc_count;
5059 adapter->rsc_total_flush = rsc_flush;
5060 }
5061
5062 for (i = 0; i < adapter->num_rx_queues; i++) {
5063 struct ixgbe_ring *rx_ring = adapter->rx_ring[i];
5064 non_eop_descs += rx_ring->rx_stats.non_eop_descs;
5065 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
5066 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
5067 hw_csum_rx_error += rx_ring->rx_stats.csum_err;
5068 bytes += rx_ring->stats.bytes;
5069 packets += rx_ring->stats.packets;
5070 }
5071 adapter->non_eop_descs = non_eop_descs;
5072 adapter->alloc_rx_page_failed = alloc_rx_page_failed;
5073 adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
5074 adapter->hw_csum_rx_error = hw_csum_rx_error;
5075 netdev->stats.rx_bytes = bytes;
5076 netdev->stats.rx_packets = packets;
5077
5078 bytes = 0;
5079 packets = 0;
5080 /* gather some stats to the adapter struct that are per queue */
5081 for (i = 0; i < adapter->num_tx_queues; i++) {
5082 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
5083 restart_queue += tx_ring->tx_stats.restart_queue;
5084 tx_busy += tx_ring->tx_stats.tx_busy;
5085 bytes += tx_ring->stats.bytes;
5086 packets += tx_ring->stats.packets;
5087 }
5088 adapter->restart_queue = restart_queue;
5089 adapter->tx_busy = tx_busy;
5090 netdev->stats.tx_bytes = bytes;
5091 netdev->stats.tx_packets = packets;
5092
5093 hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
5094
5095 /* 8 register reads */
5096 for (i = 0; i < 8; i++) {
5097 /* for packet buffers not used, the register should read 0 */
5098 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
5099 missed_rx += mpc;
5100 hwstats->mpc[i] += mpc;
5101 total_mpc += hwstats->mpc[i];
5102 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
5103 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
5104 switch (hw->mac.type) {
5105 case ixgbe_mac_82598EB:
5106 hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
5107 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
5108 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
5109 hwstats->pxonrxc[i] +=
5110 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
5111 break;
5112 case ixgbe_mac_82599EB:
5113 case ixgbe_mac_X540:
5114 hwstats->pxonrxc[i] +=
5115 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
5116 break;
5117 default:
5118 break;
5119 }
5120 }
5121
5122 /*16 register reads */
5123 for (i = 0; i < 16; i++) {
5124 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
5125 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
5126 if ((hw->mac.type == ixgbe_mac_82599EB) ||
5127 (hw->mac.type == ixgbe_mac_X540)) {
5128 hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
5129 IXGBE_READ_REG(hw, IXGBE_QBTC_H(i)); /* to clear */
5130 hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC_L(i));
5131 IXGBE_READ_REG(hw, IXGBE_QBRC_H(i)); /* to clear */
5132 }
5133 }
5134
5135 hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
5136 /* work around hardware counting issue */
5137 hwstats->gprc -= missed_rx;
5138
5139 ixgbe_update_xoff_received(adapter);
5140
5141 /* 82598 hardware only has a 32 bit counter in the high register */
5142 switch (hw->mac.type) {
5143 case ixgbe_mac_82598EB:
5144 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
5145 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
5146 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
5147 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
5148 break;
5149 case ixgbe_mac_X540:
5150 /* OS2BMC stats are X540 only*/
5151 hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC);
5152 hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC);
5153 hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC);
5154 hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC);
5155 case ixgbe_mac_82599EB:
5156 for (i = 0; i < 16; i++)
5157 adapter->hw_rx_no_dma_resources +=
5158 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5159 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
5160 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
5161 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
5162 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
5163 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
5164 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
5165 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
5166 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
5167 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
5168 #ifdef IXGBE_FCOE
5169 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
5170 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
5171 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
5172 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
5173 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
5174 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
5175 /* Add up per cpu counters for total ddp aloc fail */
5176 if (fcoe->pcpu_noddp && fcoe->pcpu_noddp_ext_buff) {
5177 for_each_possible_cpu(cpu) {
5178 fcoe_noddp_counts_sum +=
5179 *per_cpu_ptr(fcoe->pcpu_noddp, cpu);
5180 fcoe_noddp_ext_buff_counts_sum +=
5181 *per_cpu_ptr(fcoe->
5182 pcpu_noddp_ext_buff, cpu);
5183 }
5184 }
5185 hwstats->fcoe_noddp = fcoe_noddp_counts_sum;
5186 hwstats->fcoe_noddp_ext_buff = fcoe_noddp_ext_buff_counts_sum;
5187 #endif /* IXGBE_FCOE */
5188 break;
5189 default:
5190 break;
5191 }
5192 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
5193 hwstats->bprc += bprc;
5194 hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
5195 if (hw->mac.type == ixgbe_mac_82598EB)
5196 hwstats->mprc -= bprc;
5197 hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
5198 hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
5199 hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
5200 hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
5201 hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
5202 hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
5203 hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
5204 hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
5205 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
5206 hwstats->lxontxc += lxon;
5207 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
5208 hwstats->lxofftxc += lxoff;
5209 hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
5210 hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
5211 /*
5212 * 82598 errata - tx of flow control packets is included in tx counters
5213 */
5214 xon_off_tot = lxon + lxoff;
5215 hwstats->gptc -= xon_off_tot;
5216 hwstats->mptc -= xon_off_tot;
5217 hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
5218 hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5219 hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
5220 hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
5221 hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
5222 hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
5223 hwstats->ptc64 -= xon_off_tot;
5224 hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
5225 hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
5226 hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
5227 hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
5228 hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
5229 hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
5230
5231 /* Fill out the OS statistics structure */
5232 netdev->stats.multicast = hwstats->mprc;
5233
5234 /* Rx Errors */
5235 netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
5236 netdev->stats.rx_dropped = 0;
5237 netdev->stats.rx_length_errors = hwstats->rlec;
5238 netdev->stats.rx_crc_errors = hwstats->crcerrs;
5239 netdev->stats.rx_missed_errors = total_mpc;
5240 }
5241
5242 /**
5243 * ixgbe_fdir_reinit_subtask - worker thread to reinit FDIR filter table
5244 * @adapter - pointer to the device adapter structure
5245 **/
5246 static void ixgbe_fdir_reinit_subtask(struct ixgbe_adapter *adapter)
5247 {
5248 struct ixgbe_hw *hw = &adapter->hw;
5249 int i;
5250
5251 if (!(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
5252 return;
5253
5254 adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
5255
5256 /* if interface is down do nothing */
5257 if (test_bit(__IXGBE_DOWN, &adapter->state))
5258 return;
5259
5260 /* do nothing if we are not using signature filters */
5261 if (!(adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE))
5262 return;
5263
5264 adapter->fdir_overflow++;
5265
5266 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
5267 for (i = 0; i < adapter->num_tx_queues; i++)
5268 set_bit(__IXGBE_TX_FDIR_INIT_DONE,
5269 &(adapter->tx_ring[i]->state));
5270 /* re-enable flow director interrupts */
5271 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
5272 } else {
5273 e_err(probe, "failed to finish FDIR re-initialization, "
5274 "ignored adding FDIR ATR filters\n");
5275 }
5276 }
5277
5278 /**
5279 * ixgbe_check_hang_subtask - check for hung queues and dropped interrupts
5280 * @adapter - pointer to the device adapter structure
5281 *
5282 * This function serves two purposes. First it strobes the interrupt lines
5283 * in order to make certain interrupts are occurring. Secondly it sets the
5284 * bits needed to check for TX hangs. As a result we should immediately
5285 * determine if a hang has occurred.
5286 */
5287 static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter)
5288 {
5289 struct ixgbe_hw *hw = &adapter->hw;
5290 u64 eics = 0;
5291 int i;
5292
5293 /* If we're down or resetting, just bail */
5294 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5295 test_bit(__IXGBE_RESETTING, &adapter->state))
5296 return;
5297
5298 /* Force detection of hung controller */
5299 if (netif_carrier_ok(adapter->netdev)) {
5300 for (i = 0; i < adapter->num_tx_queues; i++)
5301 set_check_for_tx_hang(adapter->tx_ring[i]);
5302 }
5303
5304 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
5305 /*
5306 * for legacy and MSI interrupts don't set any bits
5307 * that are enabled for EIAM, because this operation
5308 * would set *both* EIMS and EICS for any bit in EIAM
5309 */
5310 IXGBE_WRITE_REG(hw, IXGBE_EICS,
5311 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
5312 } else {
5313 /* get one bit for every active tx/rx interrupt vector */
5314 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
5315 struct ixgbe_q_vector *qv = adapter->q_vector[i];
5316 if (qv->rx.ring || qv->tx.ring)
5317 eics |= ((u64)1 << i);
5318 }
5319 }
5320
5321 /* Cause software interrupt to ensure rings are cleaned */
5322 ixgbe_irq_rearm_queues(adapter, eics);
5323
5324 }
5325
5326 /**
5327 * ixgbe_watchdog_update_link - update the link status
5328 * @adapter - pointer to the device adapter structure
5329 * @link_speed - pointer to a u32 to store the link_speed
5330 **/
5331 static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter)
5332 {
5333 struct ixgbe_hw *hw = &adapter->hw;
5334 u32 link_speed = adapter->link_speed;
5335 bool link_up = adapter->link_up;
5336 bool pfc_en = adapter->dcb_cfg.pfc_mode_enable;
5337
5338 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
5339 return;
5340
5341 if (hw->mac.ops.check_link) {
5342 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
5343 } else {
5344 /* always assume link is up, if no check link function */
5345 link_speed = IXGBE_LINK_SPEED_10GB_FULL;
5346 link_up = true;
5347 }
5348
5349 if (adapter->ixgbe_ieee_pfc)
5350 pfc_en |= !!(adapter->ixgbe_ieee_pfc->pfc_en);
5351
5352 if (link_up && !((adapter->flags & IXGBE_FLAG_DCB_ENABLED) && pfc_en)) {
5353 hw->mac.ops.fc_enable(hw);
5354 ixgbe_set_rx_drop_en(adapter);
5355 }
5356
5357 if (link_up ||
5358 time_after(jiffies, (adapter->link_check_timeout +
5359 IXGBE_TRY_LINK_TIMEOUT))) {
5360 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5361 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
5362 IXGBE_WRITE_FLUSH(hw);
5363 }
5364
5365 adapter->link_up = link_up;
5366 adapter->link_speed = link_speed;
5367 }
5368
5369 /**
5370 * ixgbe_watchdog_link_is_up - update netif_carrier status and
5371 * print link up message
5372 * @adapter - pointer to the device adapter structure
5373 **/
5374 static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
5375 {
5376 struct net_device *netdev = adapter->netdev;
5377 struct ixgbe_hw *hw = &adapter->hw;
5378 u32 link_speed = adapter->link_speed;
5379 bool flow_rx, flow_tx;
5380
5381 /* only continue if link was previously down */
5382 if (netif_carrier_ok(netdev))
5383 return;
5384
5385 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
5386
5387 switch (hw->mac.type) {
5388 case ixgbe_mac_82598EB: {
5389 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5390 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
5391 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
5392 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
5393 }
5394 break;
5395 case ixgbe_mac_X540:
5396 case ixgbe_mac_82599EB: {
5397 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
5398 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
5399 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
5400 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
5401 }
5402 break;
5403 default:
5404 flow_tx = false;
5405 flow_rx = false;
5406 break;
5407 }
5408
5409 #ifdef CONFIG_IXGBE_PTP
5410 ixgbe_ptp_start_cyclecounter(adapter);
5411 #endif
5412
5413 e_info(drv, "NIC Link is Up %s, Flow Control: %s\n",
5414 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
5415 "10 Gbps" :
5416 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
5417 "1 Gbps" :
5418 (link_speed == IXGBE_LINK_SPEED_100_FULL ?
5419 "100 Mbps" :
5420 "unknown speed"))),
5421 ((flow_rx && flow_tx) ? "RX/TX" :
5422 (flow_rx ? "RX" :
5423 (flow_tx ? "TX" : "None"))));
5424
5425 netif_carrier_on(netdev);
5426 ixgbe_check_vf_rate_limit(adapter);
5427 }
5428
5429 /**
5430 * ixgbe_watchdog_link_is_down - update netif_carrier status and
5431 * print link down message
5432 * @adapter - pointer to the adapter structure
5433 **/
5434 static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter *adapter)
5435 {
5436 struct net_device *netdev = adapter->netdev;
5437 struct ixgbe_hw *hw = &adapter->hw;
5438
5439 adapter->link_up = false;
5440 adapter->link_speed = 0;
5441
5442 /* only continue if link was up previously */
5443 if (!netif_carrier_ok(netdev))
5444 return;
5445
5446 /* poll for SFP+ cable when link is down */
5447 if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB)
5448 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
5449
5450 #ifdef CONFIG_IXGBE_PTP
5451 ixgbe_ptp_start_cyclecounter(adapter);
5452 #endif
5453
5454 e_info(drv, "NIC Link is Down\n");
5455 netif_carrier_off(netdev);
5456 }
5457
5458 /**
5459 * ixgbe_watchdog_flush_tx - flush queues on link down
5460 * @adapter - pointer to the device adapter structure
5461 **/
5462 static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter)
5463 {
5464 int i;
5465 int some_tx_pending = 0;
5466
5467 if (!netif_carrier_ok(adapter->netdev)) {
5468 for (i = 0; i < adapter->num_tx_queues; i++) {
5469 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
5470 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
5471 some_tx_pending = 1;
5472 break;
5473 }
5474 }
5475
5476 if (some_tx_pending) {
5477 /* We've lost link, so the controller stops DMA,
5478 * but we've got queued Tx work that's never going
5479 * to get done, so reset controller to flush Tx.
5480 * (Do the reset outside of interrupt context).
5481 */
5482 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
5483 }
5484 }
5485 }
5486
5487 static void ixgbe_spoof_check(struct ixgbe_adapter *adapter)
5488 {
5489 u32 ssvpc;
5490
5491 /* Do not perform spoof check for 82598 */
5492 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
5493 return;
5494
5495 ssvpc = IXGBE_READ_REG(&adapter->hw, IXGBE_SSVPC);
5496
5497 /*
5498 * ssvpc register is cleared on read, if zero then no
5499 * spoofed packets in the last interval.
5500 */
5501 if (!ssvpc)
5502 return;
5503
5504 e_warn(drv, "%d Spoofed packets detected\n", ssvpc);
5505 }
5506
5507 /**
5508 * ixgbe_watchdog_subtask - check and bring link up
5509 * @adapter - pointer to the device adapter structure
5510 **/
5511 static void ixgbe_watchdog_subtask(struct ixgbe_adapter *adapter)
5512 {
5513 /* if interface is down do nothing */
5514 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5515 test_bit(__IXGBE_RESETTING, &adapter->state))
5516 return;
5517
5518 ixgbe_watchdog_update_link(adapter);
5519
5520 if (adapter->link_up)
5521 ixgbe_watchdog_link_is_up(adapter);
5522 else
5523 ixgbe_watchdog_link_is_down(adapter);
5524
5525 ixgbe_spoof_check(adapter);
5526 ixgbe_update_stats(adapter);
5527
5528 ixgbe_watchdog_flush_tx(adapter);
5529 }
5530
5531 /**
5532 * ixgbe_sfp_detection_subtask - poll for SFP+ cable
5533 * @adapter - the ixgbe adapter structure
5534 **/
5535 static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter)
5536 {
5537 struct ixgbe_hw *hw = &adapter->hw;
5538 s32 err;
5539
5540 /* not searching for SFP so there is nothing to do here */
5541 if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) &&
5542 !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
5543 return;
5544
5545 /* someone else is in init, wait until next service event */
5546 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
5547 return;
5548
5549 err = hw->phy.ops.identify_sfp(hw);
5550 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
5551 goto sfp_out;
5552
5553 if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
5554 /* If no cable is present, then we need to reset
5555 * the next time we find a good cable. */
5556 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
5557 }
5558
5559 /* exit on error */
5560 if (err)
5561 goto sfp_out;
5562
5563 /* exit if reset not needed */
5564 if (!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
5565 goto sfp_out;
5566
5567 adapter->flags2 &= ~IXGBE_FLAG2_SFP_NEEDS_RESET;
5568
5569 /*
5570 * A module may be identified correctly, but the EEPROM may not have
5571 * support for that module. setup_sfp() will fail in that case, so
5572 * we should not allow that module to load.
5573 */
5574 if (hw->mac.type == ixgbe_mac_82598EB)
5575 err = hw->phy.ops.reset(hw);
5576 else
5577 err = hw->mac.ops.setup_sfp(hw);
5578
5579 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
5580 goto sfp_out;
5581
5582 adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
5583 e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
5584
5585 sfp_out:
5586 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
5587
5588 if ((err == IXGBE_ERR_SFP_NOT_SUPPORTED) &&
5589 (adapter->netdev->reg_state == NETREG_REGISTERED)) {
5590 e_dev_err("failed to initialize because an unsupported "
5591 "SFP+ module type was detected.\n");
5592 e_dev_err("Reload the driver after installing a "
5593 "supported module.\n");
5594 unregister_netdev(adapter->netdev);
5595 }
5596 }
5597
5598 /**
5599 * ixgbe_sfp_link_config_subtask - set up link SFP after module install
5600 * @adapter - the ixgbe adapter structure
5601 **/
5602 static void ixgbe_sfp_link_config_subtask(struct ixgbe_adapter *adapter)
5603 {
5604 struct ixgbe_hw *hw = &adapter->hw;
5605 u32 autoneg;
5606 bool negotiation;
5607
5608 if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_CONFIG))
5609 return;
5610
5611 /* someone else is in init, wait until next service event */
5612 if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
5613 return;
5614
5615 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
5616
5617 autoneg = hw->phy.autoneg_advertised;
5618 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
5619 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
5620 if (hw->mac.ops.setup_link)
5621 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
5622
5623 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
5624 adapter->link_check_timeout = jiffies;
5625 clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
5626 }
5627
5628 #ifdef CONFIG_PCI_IOV
5629 static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter)
5630 {
5631 int vf;
5632 struct ixgbe_hw *hw = &adapter->hw;
5633 struct net_device *netdev = adapter->netdev;
5634 u32 gpc;
5635 u32 ciaa, ciad;
5636
5637 gpc = IXGBE_READ_REG(hw, IXGBE_TXDGPC);
5638 if (gpc) /* If incrementing then no need for the check below */
5639 return;
5640 /*
5641 * Check to see if a bad DMA write target from an errant or
5642 * malicious VF has caused a PCIe error. If so then we can
5643 * issue a VFLR to the offending VF(s) and then resume without
5644 * requesting a full slot reset.
5645 */
5646
5647 for (vf = 0; vf < adapter->num_vfs; vf++) {
5648 ciaa = (vf << 16) | 0x80000000;
5649 /* 32 bit read so align, we really want status at offset 6 */
5650 ciaa |= PCI_COMMAND;
5651 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
5652 ciad = IXGBE_READ_REG(hw, IXGBE_CIAD_82599);
5653 ciaa &= 0x7FFFFFFF;
5654 /* disable debug mode asap after reading data */
5655 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
5656 /* Get the upper 16 bits which will be the PCI status reg */
5657 ciad >>= 16;
5658 if (ciad & PCI_STATUS_REC_MASTER_ABORT) {
5659 netdev_err(netdev, "VF %d Hung DMA\n", vf);
5660 /* Issue VFLR */
5661 ciaa = (vf << 16) | 0x80000000;
5662 ciaa |= 0xA8;
5663 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
5664 ciad = 0x00008000; /* VFLR */
5665 IXGBE_WRITE_REG(hw, IXGBE_CIAD_82599, ciad);
5666 ciaa &= 0x7FFFFFFF;
5667 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
5668 }
5669 }
5670 }
5671
5672 #endif
5673 /**
5674 * ixgbe_service_timer - Timer Call-back
5675 * @data: pointer to adapter cast into an unsigned long
5676 **/
5677 static void ixgbe_service_timer(unsigned long data)
5678 {
5679 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
5680 unsigned long next_event_offset;
5681 bool ready = true;
5682
5683 /* poll faster when waiting for link */
5684 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
5685 next_event_offset = HZ / 10;
5686 else
5687 next_event_offset = HZ * 2;
5688
5689 #ifdef CONFIG_PCI_IOV
5690 /*
5691 * don't bother with SR-IOV VF DMA hang check if there are
5692 * no VFs or the link is down
5693 */
5694 if (!adapter->num_vfs ||
5695 (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
5696 goto normal_timer_service;
5697
5698 /* If we have VFs allocated then we must check for DMA hangs */
5699 ixgbe_check_for_bad_vf(adapter);
5700 next_event_offset = HZ / 50;
5701 adapter->timer_event_accumulator++;
5702
5703 if (adapter->timer_event_accumulator >= 100)
5704 adapter->timer_event_accumulator = 0;
5705 else
5706 ready = false;
5707
5708 normal_timer_service:
5709 #endif
5710 /* Reset the timer */
5711 mod_timer(&adapter->service_timer, next_event_offset + jiffies);
5712
5713 if (ready)
5714 ixgbe_service_event_schedule(adapter);
5715 }
5716
5717 static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter)
5718 {
5719 if (!(adapter->flags2 & IXGBE_FLAG2_RESET_REQUESTED))
5720 return;
5721
5722 adapter->flags2 &= ~IXGBE_FLAG2_RESET_REQUESTED;
5723
5724 /* If we're already down or resetting, just bail */
5725 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5726 test_bit(__IXGBE_RESETTING, &adapter->state))
5727 return;
5728
5729 ixgbe_dump(adapter);
5730 netdev_err(adapter->netdev, "Reset adapter\n");
5731 adapter->tx_timeout_count++;
5732
5733 ixgbe_reinit_locked(adapter);
5734 }
5735
5736 /**
5737 * ixgbe_service_task - manages and runs subtasks
5738 * @work: pointer to work_struct containing our data
5739 **/
5740 static void ixgbe_service_task(struct work_struct *work)
5741 {
5742 struct ixgbe_adapter *adapter = container_of(work,
5743 struct ixgbe_adapter,
5744 service_task);
5745
5746 ixgbe_reset_subtask(adapter);
5747 ixgbe_sfp_detection_subtask(adapter);
5748 ixgbe_sfp_link_config_subtask(adapter);
5749 ixgbe_check_overtemp_subtask(adapter);
5750 ixgbe_watchdog_subtask(adapter);
5751 ixgbe_fdir_reinit_subtask(adapter);
5752 ixgbe_check_hang_subtask(adapter);
5753 #ifdef CONFIG_IXGBE_PTP
5754 ixgbe_ptp_overflow_check(adapter);
5755 #endif
5756
5757 ixgbe_service_event_complete(adapter);
5758 }
5759
5760 static int ixgbe_tso(struct ixgbe_ring *tx_ring,
5761 struct ixgbe_tx_buffer *first,
5762 u8 *hdr_len)
5763 {
5764 struct sk_buff *skb = first->skb;
5765 u32 vlan_macip_lens, type_tucmd;
5766 u32 mss_l4len_idx, l4len;
5767
5768 if (!skb_is_gso(skb))
5769 return 0;
5770
5771 if (skb_header_cloned(skb)) {
5772 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
5773 if (err)
5774 return err;
5775 }
5776
5777 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
5778 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
5779
5780 if (first->protocol == __constant_htons(ETH_P_IP)) {
5781 struct iphdr *iph = ip_hdr(skb);
5782 iph->tot_len = 0;
5783 iph->check = 0;
5784 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
5785 iph->daddr, 0,
5786 IPPROTO_TCP,
5787 0);
5788 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
5789 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
5790 IXGBE_TX_FLAGS_CSUM |
5791 IXGBE_TX_FLAGS_IPV4;
5792 } else if (skb_is_gso_v6(skb)) {
5793 ipv6_hdr(skb)->payload_len = 0;
5794 tcp_hdr(skb)->check =
5795 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
5796 &ipv6_hdr(skb)->daddr,
5797 0, IPPROTO_TCP, 0);
5798 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
5799 IXGBE_TX_FLAGS_CSUM;
5800 }
5801
5802 /* compute header lengths */
5803 l4len = tcp_hdrlen(skb);
5804 *hdr_len = skb_transport_offset(skb) + l4len;
5805
5806 /* update gso size and bytecount with header size */
5807 first->gso_segs = skb_shinfo(skb)->gso_segs;
5808 first->bytecount += (first->gso_segs - 1) * *hdr_len;
5809
5810 /* mss_l4len_id: use 1 as index for TSO */
5811 mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
5812 mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
5813 mss_l4len_idx |= 1 << IXGBE_ADVTXD_IDX_SHIFT;
5814
5815 /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
5816 vlan_macip_lens = skb_network_header_len(skb);
5817 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
5818 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
5819
5820 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, type_tucmd,
5821 mss_l4len_idx);
5822
5823 return 1;
5824 }
5825
5826 static void ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
5827 struct ixgbe_tx_buffer *first)
5828 {
5829 struct sk_buff *skb = first->skb;
5830 u32 vlan_macip_lens = 0;
5831 u32 mss_l4len_idx = 0;
5832 u32 type_tucmd = 0;
5833
5834 if (skb->ip_summed != CHECKSUM_PARTIAL) {
5835 if (!(first->tx_flags & IXGBE_TX_FLAGS_HW_VLAN) &&
5836 !(first->tx_flags & IXGBE_TX_FLAGS_TXSW))
5837 return;
5838 } else {
5839 u8 l4_hdr = 0;
5840 switch (first->protocol) {
5841 case __constant_htons(ETH_P_IP):
5842 vlan_macip_lens |= skb_network_header_len(skb);
5843 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
5844 l4_hdr = ip_hdr(skb)->protocol;
5845 break;
5846 case __constant_htons(ETH_P_IPV6):
5847 vlan_macip_lens |= skb_network_header_len(skb);
5848 l4_hdr = ipv6_hdr(skb)->nexthdr;
5849 break;
5850 default:
5851 if (unlikely(net_ratelimit())) {
5852 dev_warn(tx_ring->dev,
5853 "partial checksum but proto=%x!\n",
5854 first->protocol);
5855 }
5856 break;
5857 }
5858
5859 switch (l4_hdr) {
5860 case IPPROTO_TCP:
5861 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
5862 mss_l4len_idx = tcp_hdrlen(skb) <<
5863 IXGBE_ADVTXD_L4LEN_SHIFT;
5864 break;
5865 case IPPROTO_SCTP:
5866 type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
5867 mss_l4len_idx = sizeof(struct sctphdr) <<
5868 IXGBE_ADVTXD_L4LEN_SHIFT;
5869 break;
5870 case IPPROTO_UDP:
5871 mss_l4len_idx = sizeof(struct udphdr) <<
5872 IXGBE_ADVTXD_L4LEN_SHIFT;
5873 break;
5874 default:
5875 if (unlikely(net_ratelimit())) {
5876 dev_warn(tx_ring->dev,
5877 "partial checksum but l4 proto=%x!\n",
5878 l4_hdr);
5879 }
5880 break;
5881 }
5882
5883 /* update TX checksum flag */
5884 first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
5885 }
5886
5887 /* vlan_macip_lens: MACLEN, VLAN tag */
5888 vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
5889 vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
5890
5891 ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0,
5892 type_tucmd, mss_l4len_idx);
5893 }
5894
5895 static __le32 ixgbe_tx_cmd_type(u32 tx_flags)
5896 {
5897 /* set type for advanced descriptor with frame checksum insertion */
5898 __le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA |
5899 IXGBE_ADVTXD_DCMD_IFCS |
5900 IXGBE_ADVTXD_DCMD_DEXT);
5901
5902 /* set HW vlan bit if vlan is present */
5903 if (tx_flags & IXGBE_TX_FLAGS_HW_VLAN)
5904 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE);
5905
5906 #ifdef CONFIG_IXGBE_PTP
5907 if (tx_flags & IXGBE_TX_FLAGS_TSTAMP)
5908 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_MAC_TSTAMP);
5909 #endif
5910
5911 /* set segmentation enable bits for TSO/FSO */
5912 #ifdef IXGBE_FCOE
5913 if (tx_flags & (IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_FSO))
5914 #else
5915 if (tx_flags & IXGBE_TX_FLAGS_TSO)
5916 #endif
5917 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE);
5918
5919 return cmd_type;
5920 }
5921
5922 static void ixgbe_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
5923 u32 tx_flags, unsigned int paylen)
5924 {
5925 __le32 olinfo_status = cpu_to_le32(paylen << IXGBE_ADVTXD_PAYLEN_SHIFT);
5926
5927 /* enable L4 checksum for TSO and TX checksum offload */
5928 if (tx_flags & IXGBE_TX_FLAGS_CSUM)
5929 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM);
5930
5931 /* enble IPv4 checksum for TSO */
5932 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
5933 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM);
5934
5935 /* use index 1 context for TSO/FSO/FCOE */
5936 #ifdef IXGBE_FCOE
5937 if (tx_flags & (IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_FCOE))
5938 #else
5939 if (tx_flags & IXGBE_TX_FLAGS_TSO)
5940 #endif
5941 olinfo_status |= cpu_to_le32(1 << IXGBE_ADVTXD_IDX_SHIFT);
5942
5943 /*
5944 * Check Context must be set if Tx switch is enabled, which it
5945 * always is for case where virtual functions are running
5946 */
5947 #ifdef IXGBE_FCOE
5948 if (tx_flags & (IXGBE_TX_FLAGS_TXSW | IXGBE_TX_FLAGS_FCOE))
5949 #else
5950 if (tx_flags & IXGBE_TX_FLAGS_TXSW)
5951 #endif
5952 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC);
5953
5954 tx_desc->read.olinfo_status = olinfo_status;
5955 }
5956
5957 #define IXGBE_TXD_CMD (IXGBE_TXD_CMD_EOP | \
5958 IXGBE_TXD_CMD_RS)
5959
5960 static void ixgbe_tx_map(struct ixgbe_ring *tx_ring,
5961 struct ixgbe_tx_buffer *first,
5962 const u8 hdr_len)
5963 {
5964 dma_addr_t dma;
5965 struct sk_buff *skb = first->skb;
5966 struct ixgbe_tx_buffer *tx_buffer;
5967 union ixgbe_adv_tx_desc *tx_desc;
5968 struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[0];
5969 unsigned int data_len = skb->data_len;
5970 unsigned int size = skb_headlen(skb);
5971 unsigned int paylen = skb->len - hdr_len;
5972 u32 tx_flags = first->tx_flags;
5973 __le32 cmd_type;
5974 u16 i = tx_ring->next_to_use;
5975
5976 tx_desc = IXGBE_TX_DESC(tx_ring, i);
5977
5978 ixgbe_tx_olinfo_status(tx_desc, tx_flags, paylen);
5979 cmd_type = ixgbe_tx_cmd_type(tx_flags);
5980
5981 #ifdef IXGBE_FCOE
5982 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
5983 if (data_len < sizeof(struct fcoe_crc_eof)) {
5984 size -= sizeof(struct fcoe_crc_eof) - data_len;
5985 data_len = 0;
5986 } else {
5987 data_len -= sizeof(struct fcoe_crc_eof);
5988 }
5989 }
5990
5991 #endif
5992 dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
5993 if (dma_mapping_error(tx_ring->dev, dma))
5994 goto dma_error;
5995
5996 /* record length, and DMA address */
5997 dma_unmap_len_set(first, len, size);
5998 dma_unmap_addr_set(first, dma, dma);
5999
6000 tx_desc->read.buffer_addr = cpu_to_le64(dma);
6001
6002 for (;;) {
6003 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
6004 tx_desc->read.cmd_type_len =
6005 cmd_type | cpu_to_le32(IXGBE_MAX_DATA_PER_TXD);
6006
6007 i++;
6008 tx_desc++;
6009 if (i == tx_ring->count) {
6010 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
6011 i = 0;
6012 }
6013
6014 dma += IXGBE_MAX_DATA_PER_TXD;
6015 size -= IXGBE_MAX_DATA_PER_TXD;
6016
6017 tx_desc->read.buffer_addr = cpu_to_le64(dma);
6018 tx_desc->read.olinfo_status = 0;
6019 }
6020
6021 if (likely(!data_len))
6022 break;
6023
6024 if (unlikely(skb->no_fcs))
6025 cmd_type &= ~(cpu_to_le32(IXGBE_ADVTXD_DCMD_IFCS));
6026 tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size);
6027
6028 i++;
6029 tx_desc++;
6030 if (i == tx_ring->count) {
6031 tx_desc = IXGBE_TX_DESC(tx_ring, 0);
6032 i = 0;
6033 }
6034
6035 #ifdef IXGBE_FCOE
6036 size = min_t(unsigned int, data_len, skb_frag_size(frag));
6037 #else
6038 size = skb_frag_size(frag);
6039 #endif
6040 data_len -= size;
6041
6042 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
6043 DMA_TO_DEVICE);
6044 if (dma_mapping_error(tx_ring->dev, dma))
6045 goto dma_error;
6046
6047 tx_buffer = &tx_ring->tx_buffer_info[i];
6048 dma_unmap_len_set(tx_buffer, len, size);
6049 dma_unmap_addr_set(tx_buffer, dma, dma);
6050
6051 tx_desc->read.buffer_addr = cpu_to_le64(dma);
6052 tx_desc->read.olinfo_status = 0;
6053
6054 frag++;
6055 }
6056
6057 /* write last descriptor with RS and EOP bits */
6058 cmd_type |= cpu_to_le32(size) | cpu_to_le32(IXGBE_TXD_CMD);
6059 tx_desc->read.cmd_type_len = cmd_type;
6060
6061 netdev_tx_sent_queue(txring_txq(tx_ring), first->bytecount);
6062
6063 /* set the timestamp */
6064 first->time_stamp = jiffies;
6065
6066 /*
6067 * Force memory writes to complete before letting h/w know there
6068 * are new descriptors to fetch. (Only applicable for weak-ordered
6069 * memory model archs, such as IA-64).
6070 *
6071 * We also need this memory barrier to make certain all of the
6072 * status bits have been updated before next_to_watch is written.
6073 */
6074 wmb();
6075
6076 /* set next_to_watch value indicating a packet is present */
6077 first->next_to_watch = tx_desc;
6078
6079 i++;
6080 if (i == tx_ring->count)
6081 i = 0;
6082
6083 tx_ring->next_to_use = i;
6084
6085 /* notify HW of packet */
6086 writel(i, tx_ring->tail);
6087
6088 return;
6089 dma_error:
6090 dev_err(tx_ring->dev, "TX DMA map failed\n");
6091
6092 /* clear dma mappings for failed tx_buffer_info map */
6093 for (;;) {
6094 tx_buffer = &tx_ring->tx_buffer_info[i];
6095 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer);
6096 if (tx_buffer == first)
6097 break;
6098 if (i == 0)
6099 i = tx_ring->count;
6100 i--;
6101 }
6102
6103 tx_ring->next_to_use = i;
6104 }
6105
6106 static void ixgbe_atr(struct ixgbe_ring *ring,
6107 struct ixgbe_tx_buffer *first)
6108 {
6109 struct ixgbe_q_vector *q_vector = ring->q_vector;
6110 union ixgbe_atr_hash_dword input = { .dword = 0 };
6111 union ixgbe_atr_hash_dword common = { .dword = 0 };
6112 union {
6113 unsigned char *network;
6114 struct iphdr *ipv4;
6115 struct ipv6hdr *ipv6;
6116 } hdr;
6117 struct tcphdr *th;
6118 __be16 vlan_id;
6119
6120 /* if ring doesn't have a interrupt vector, cannot perform ATR */
6121 if (!q_vector)
6122 return;
6123
6124 /* do nothing if sampling is disabled */
6125 if (!ring->atr_sample_rate)
6126 return;
6127
6128 ring->atr_count++;
6129
6130 /* snag network header to get L4 type and address */
6131 hdr.network = skb_network_header(first->skb);
6132
6133 /* Currently only IPv4/IPv6 with TCP is supported */
6134 if ((first->protocol != __constant_htons(ETH_P_IPV6) ||
6135 hdr.ipv6->nexthdr != IPPROTO_TCP) &&
6136 (first->protocol != __constant_htons(ETH_P_IP) ||
6137 hdr.ipv4->protocol != IPPROTO_TCP))
6138 return;
6139
6140 th = tcp_hdr(first->skb);
6141
6142 /* skip this packet since it is invalid or the socket is closing */
6143 if (!th || th->fin)
6144 return;
6145
6146 /* sample on all syn packets or once every atr sample count */
6147 if (!th->syn && (ring->atr_count < ring->atr_sample_rate))
6148 return;
6149
6150 /* reset sample count */
6151 ring->atr_count = 0;
6152
6153 vlan_id = htons(first->tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT);
6154
6155 /*
6156 * src and dst are inverted, think how the receiver sees them
6157 *
6158 * The input is broken into two sections, a non-compressed section
6159 * containing vm_pool, vlan_id, and flow_type. The rest of the data
6160 * is XORed together and stored in the compressed dword.
6161 */
6162 input.formatted.vlan_id = vlan_id;
6163
6164 /*
6165 * since src port and flex bytes occupy the same word XOR them together
6166 * and write the value to source port portion of compressed dword
6167 */
6168 if (first->tx_flags & (IXGBE_TX_FLAGS_SW_VLAN | IXGBE_TX_FLAGS_HW_VLAN))
6169 common.port.src ^= th->dest ^ __constant_htons(ETH_P_8021Q);
6170 else
6171 common.port.src ^= th->dest ^ first->protocol;
6172 common.port.dst ^= th->source;
6173
6174 if (first->protocol == __constant_htons(ETH_P_IP)) {
6175 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4;
6176 common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr;
6177 } else {
6178 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6;
6179 common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^
6180 hdr.ipv6->saddr.s6_addr32[1] ^
6181 hdr.ipv6->saddr.s6_addr32[2] ^
6182 hdr.ipv6->saddr.s6_addr32[3] ^
6183 hdr.ipv6->daddr.s6_addr32[0] ^
6184 hdr.ipv6->daddr.s6_addr32[1] ^
6185 hdr.ipv6->daddr.s6_addr32[2] ^
6186 hdr.ipv6->daddr.s6_addr32[3];
6187 }
6188
6189 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
6190 ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw,
6191 input, common, ring->queue_index);
6192 }
6193
6194 static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
6195 {
6196 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
6197 /* Herbert's original patch had:
6198 * smp_mb__after_netif_stop_queue();
6199 * but since that doesn't exist yet, just open code it. */
6200 smp_mb();
6201
6202 /* We need to check again in a case another CPU has just
6203 * made room available. */
6204 if (likely(ixgbe_desc_unused(tx_ring) < size))
6205 return -EBUSY;
6206
6207 /* A reprieve! - use start_queue because it doesn't call schedule */
6208 netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
6209 ++tx_ring->tx_stats.restart_queue;
6210 return 0;
6211 }
6212
6213 static inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
6214 {
6215 if (likely(ixgbe_desc_unused(tx_ring) >= size))
6216 return 0;
6217 return __ixgbe_maybe_stop_tx(tx_ring, size);
6218 }
6219
6220 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
6221 {
6222 struct ixgbe_adapter *adapter = netdev_priv(dev);
6223 int txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) :
6224 smp_processor_id();
6225 #ifdef IXGBE_FCOE
6226 __be16 protocol = vlan_get_protocol(skb);
6227
6228 if (((protocol == htons(ETH_P_FCOE)) ||
6229 (protocol == htons(ETH_P_FIP))) &&
6230 (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) {
6231 txq &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
6232 txq += adapter->ring_feature[RING_F_FCOE].mask;
6233 return txq;
6234 }
6235 #endif
6236
6237 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
6238 while (unlikely(txq >= dev->real_num_tx_queues))
6239 txq -= dev->real_num_tx_queues;
6240 return txq;
6241 }
6242
6243 return skb_tx_hash(dev, skb);
6244 }
6245
6246 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
6247 struct ixgbe_adapter *adapter,
6248 struct ixgbe_ring *tx_ring)
6249 {
6250 struct ixgbe_tx_buffer *first;
6251 int tso;
6252 u32 tx_flags = 0;
6253 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
6254 unsigned short f;
6255 #endif
6256 u16 count = TXD_USE_COUNT(skb_headlen(skb));
6257 __be16 protocol = skb->protocol;
6258 u8 hdr_len = 0;
6259
6260 /*
6261 * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
6262 * + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
6263 * + 2 desc gap to keep tail from touching head,
6264 * + 1 desc for context descriptor,
6265 * otherwise try next time
6266 */
6267 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
6268 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
6269 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
6270 #else
6271 count += skb_shinfo(skb)->nr_frags;
6272 #endif
6273 if (ixgbe_maybe_stop_tx(tx_ring, count + 3)) {
6274 tx_ring->tx_stats.tx_busy++;
6275 return NETDEV_TX_BUSY;
6276 }
6277
6278 /* record the location of the first descriptor for this packet */
6279 first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
6280 first->skb = skb;
6281 first->bytecount = skb->len;
6282 first->gso_segs = 1;
6283
6284 /* if we have a HW VLAN tag being added default to the HW one */
6285 if (vlan_tx_tag_present(skb)) {
6286 tx_flags |= vlan_tx_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT;
6287 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
6288 /* else if it is a SW VLAN check the next protocol and store the tag */
6289 } else if (protocol == __constant_htons(ETH_P_8021Q)) {
6290 struct vlan_hdr *vhdr, _vhdr;
6291 vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(_vhdr), &_vhdr);
6292 if (!vhdr)
6293 goto out_drop;
6294
6295 protocol = vhdr->h_vlan_encapsulated_proto;
6296 tx_flags |= ntohs(vhdr->h_vlan_TCI) <<
6297 IXGBE_TX_FLAGS_VLAN_SHIFT;
6298 tx_flags |= IXGBE_TX_FLAGS_SW_VLAN;
6299 }
6300
6301 skb_tx_timestamp(skb);
6302
6303 #ifdef CONFIG_IXGBE_PTP
6304 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)) {
6305 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
6306 tx_flags |= IXGBE_TX_FLAGS_TSTAMP;
6307 }
6308 #endif
6309
6310 #ifdef CONFIG_PCI_IOV
6311 /*
6312 * Use the l2switch_enable flag - would be false if the DMA
6313 * Tx switch had been disabled.
6314 */
6315 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6316 tx_flags |= IXGBE_TX_FLAGS_TXSW;
6317
6318 #endif
6319 /* DCB maps skb priorities 0-7 onto 3 bit PCP of VLAN tag. */
6320 if ((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
6321 ((tx_flags & (IXGBE_TX_FLAGS_HW_VLAN | IXGBE_TX_FLAGS_SW_VLAN)) ||
6322 (skb->priority != TC_PRIO_CONTROL))) {
6323 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
6324 tx_flags |= (skb->priority & 0x7) <<
6325 IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT;
6326 if (tx_flags & IXGBE_TX_FLAGS_SW_VLAN) {
6327 struct vlan_ethhdr *vhdr;
6328 if (skb_header_cloned(skb) &&
6329 pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
6330 goto out_drop;
6331 vhdr = (struct vlan_ethhdr *)skb->data;
6332 vhdr->h_vlan_TCI = htons(tx_flags >>
6333 IXGBE_TX_FLAGS_VLAN_SHIFT);
6334 } else {
6335 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
6336 }
6337 }
6338
6339 /* record initial flags and protocol */
6340 first->tx_flags = tx_flags;
6341 first->protocol = protocol;
6342
6343 #ifdef IXGBE_FCOE
6344 /* setup tx offload for FCoE */
6345 if ((protocol == __constant_htons(ETH_P_FCOE)) &&
6346 (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) {
6347 tso = ixgbe_fso(tx_ring, first, &hdr_len);
6348 if (tso < 0)
6349 goto out_drop;
6350
6351 goto xmit_fcoe;
6352 }
6353
6354 #endif /* IXGBE_FCOE */
6355 tso = ixgbe_tso(tx_ring, first, &hdr_len);
6356 if (tso < 0)
6357 goto out_drop;
6358 else if (!tso)
6359 ixgbe_tx_csum(tx_ring, first);
6360
6361 /* add the ATR filter if ATR is on */
6362 if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state))
6363 ixgbe_atr(tx_ring, first);
6364
6365 #ifdef IXGBE_FCOE
6366 xmit_fcoe:
6367 #endif /* IXGBE_FCOE */
6368 ixgbe_tx_map(tx_ring, first, hdr_len);
6369
6370 ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);
6371
6372 return NETDEV_TX_OK;
6373
6374 out_drop:
6375 dev_kfree_skb_any(first->skb);
6376 first->skb = NULL;
6377
6378 return NETDEV_TX_OK;
6379 }
6380
6381 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
6382 struct net_device *netdev)
6383 {
6384 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6385 struct ixgbe_ring *tx_ring;
6386
6387 if (skb->len <= 0) {
6388 dev_kfree_skb_any(skb);
6389 return NETDEV_TX_OK;
6390 }
6391
6392 /*
6393 * The minimum packet size for olinfo paylen is 17 so pad the skb
6394 * in order to meet this minimum size requirement.
6395 */
6396 if (skb->len < 17) {
6397 if (skb_padto(skb, 17))
6398 return NETDEV_TX_OK;
6399 skb->len = 17;
6400 }
6401
6402 tx_ring = adapter->tx_ring[skb->queue_mapping];
6403 return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
6404 }
6405
6406 /**
6407 * ixgbe_set_mac - Change the Ethernet Address of the NIC
6408 * @netdev: network interface device structure
6409 * @p: pointer to an address structure
6410 *
6411 * Returns 0 on success, negative on failure
6412 **/
6413 static int ixgbe_set_mac(struct net_device *netdev, void *p)
6414 {
6415 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6416 struct ixgbe_hw *hw = &adapter->hw;
6417 struct sockaddr *addr = p;
6418
6419 if (!is_valid_ether_addr(addr->sa_data))
6420 return -EADDRNOTAVAIL;
6421
6422 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
6423 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
6424
6425 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
6426 IXGBE_RAH_AV);
6427
6428 return 0;
6429 }
6430
6431 static int
6432 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
6433 {
6434 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6435 struct ixgbe_hw *hw = &adapter->hw;
6436 u16 value;
6437 int rc;
6438
6439 if (prtad != hw->phy.mdio.prtad)
6440 return -EINVAL;
6441 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
6442 if (!rc)
6443 rc = value;
6444 return rc;
6445 }
6446
6447 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
6448 u16 addr, u16 value)
6449 {
6450 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6451 struct ixgbe_hw *hw = &adapter->hw;
6452
6453 if (prtad != hw->phy.mdio.prtad)
6454 return -EINVAL;
6455 return hw->phy.ops.write_reg(hw, addr, devad, value);
6456 }
6457
6458 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
6459 {
6460 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6461
6462 switch (cmd) {
6463 #ifdef CONFIG_IXGBE_PTP
6464 case SIOCSHWTSTAMP:
6465 return ixgbe_ptp_hwtstamp_ioctl(adapter, req, cmd);
6466 #endif
6467 default:
6468 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
6469 }
6470 }
6471
6472 /**
6473 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
6474 * netdev->dev_addrs
6475 * @netdev: network interface device structure
6476 *
6477 * Returns non-zero on failure
6478 **/
6479 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
6480 {
6481 int err = 0;
6482 struct ixgbe_adapter *adapter = netdev_priv(dev);
6483 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6484
6485 if (is_valid_ether_addr(mac->san_addr)) {
6486 rtnl_lock();
6487 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6488 rtnl_unlock();
6489 }
6490 return err;
6491 }
6492
6493 /**
6494 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
6495 * netdev->dev_addrs
6496 * @netdev: network interface device structure
6497 *
6498 * Returns non-zero on failure
6499 **/
6500 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
6501 {
6502 int err = 0;
6503 struct ixgbe_adapter *adapter = netdev_priv(dev);
6504 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6505
6506 if (is_valid_ether_addr(mac->san_addr)) {
6507 rtnl_lock();
6508 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6509 rtnl_unlock();
6510 }
6511 return err;
6512 }
6513
6514 #ifdef CONFIG_NET_POLL_CONTROLLER
6515 /*
6516 * Polling 'interrupt' - used by things like netconsole to send skbs
6517 * without having to re-enable interrupts. It's not called while
6518 * the interrupt routine is executing.
6519 */
6520 static void ixgbe_netpoll(struct net_device *netdev)
6521 {
6522 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6523 int i;
6524
6525 /* if interface is down do nothing */
6526 if (test_bit(__IXGBE_DOWN, &adapter->state))
6527 return;
6528
6529 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
6530 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
6531 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
6532 for (i = 0; i < num_q_vectors; i++) {
6533 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
6534 ixgbe_msix_clean_rings(0, q_vector);
6535 }
6536 } else {
6537 ixgbe_intr(adapter->pdev->irq, netdev);
6538 }
6539 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
6540 }
6541
6542 #endif
6543 static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
6544 struct rtnl_link_stats64 *stats)
6545 {
6546 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6547 int i;
6548
6549 rcu_read_lock();
6550 for (i = 0; i < adapter->num_rx_queues; i++) {
6551 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]);
6552 u64 bytes, packets;
6553 unsigned int start;
6554
6555 if (ring) {
6556 do {
6557 start = u64_stats_fetch_begin_bh(&ring->syncp);
6558 packets = ring->stats.packets;
6559 bytes = ring->stats.bytes;
6560 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
6561 stats->rx_packets += packets;
6562 stats->rx_bytes += bytes;
6563 }
6564 }
6565
6566 for (i = 0; i < adapter->num_tx_queues; i++) {
6567 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->tx_ring[i]);
6568 u64 bytes, packets;
6569 unsigned int start;
6570
6571 if (ring) {
6572 do {
6573 start = u64_stats_fetch_begin_bh(&ring->syncp);
6574 packets = ring->stats.packets;
6575 bytes = ring->stats.bytes;
6576 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
6577 stats->tx_packets += packets;
6578 stats->tx_bytes += bytes;
6579 }
6580 }
6581 rcu_read_unlock();
6582 /* following stats updated by ixgbe_watchdog_task() */
6583 stats->multicast = netdev->stats.multicast;
6584 stats->rx_errors = netdev->stats.rx_errors;
6585 stats->rx_length_errors = netdev->stats.rx_length_errors;
6586 stats->rx_crc_errors = netdev->stats.rx_crc_errors;
6587 stats->rx_missed_errors = netdev->stats.rx_missed_errors;
6588 return stats;
6589 }
6590
6591 #ifdef CONFIG_IXGBE_DCB
6592 /* ixgbe_validate_rtr - verify 802.1Qp to Rx packet buffer mapping is valid.
6593 * #adapter: pointer to ixgbe_adapter
6594 * @tc: number of traffic classes currently enabled
6595 *
6596 * Configure a valid 802.1Qp to Rx packet buffer mapping ie confirm
6597 * 802.1Q priority maps to a packet buffer that exists.
6598 */
6599 static void ixgbe_validate_rtr(struct ixgbe_adapter *adapter, u8 tc)
6600 {
6601 struct ixgbe_hw *hw = &adapter->hw;
6602 u32 reg, rsave;
6603 int i;
6604
6605 /* 82598 have a static priority to TC mapping that can not
6606 * be changed so no validation is needed.
6607 */
6608 if (hw->mac.type == ixgbe_mac_82598EB)
6609 return;
6610
6611 reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC);
6612 rsave = reg;
6613
6614 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
6615 u8 up2tc = reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT);
6616
6617 /* If up2tc is out of bounds default to zero */
6618 if (up2tc > tc)
6619 reg &= ~(0x7 << IXGBE_RTRUP2TC_UP_SHIFT);
6620 }
6621
6622 if (reg != rsave)
6623 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
6624
6625 return;
6626 }
6627
6628 /* ixgbe_setup_tc - routine to configure net_device for multiple traffic
6629 * classes.
6630 *
6631 * @netdev: net device to configure
6632 * @tc: number of traffic classes to enable
6633 */
6634 int ixgbe_setup_tc(struct net_device *dev, u8 tc)
6635 {
6636 struct ixgbe_adapter *adapter = netdev_priv(dev);
6637 struct ixgbe_hw *hw = &adapter->hw;
6638
6639 /* Multiple traffic classes requires multiple queues */
6640 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
6641 e_err(drv, "Enable failed, needs MSI-X\n");
6642 return -EINVAL;
6643 }
6644
6645 /* Hardware supports up to 8 traffic classes */
6646 if (tc > adapter->dcb_cfg.num_tcs.pg_tcs ||
6647 (hw->mac.type == ixgbe_mac_82598EB &&
6648 tc < MAX_TRAFFIC_CLASS))
6649 return -EINVAL;
6650
6651 /* Hardware has to reinitialize queues and interrupts to
6652 * match packet buffer alignment. Unfortunately, the
6653 * hardware is not flexible enough to do this dynamically.
6654 */
6655 if (netif_running(dev))
6656 ixgbe_close(dev);
6657 ixgbe_clear_interrupt_scheme(adapter);
6658
6659 if (tc) {
6660 netdev_set_num_tc(dev, tc);
6661 adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
6662 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
6663
6664 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
6665 adapter->last_lfc_mode = adapter->hw.fc.requested_mode;
6666 adapter->hw.fc.requested_mode = ixgbe_fc_none;
6667 }
6668 } else {
6669 netdev_reset_tc(dev);
6670 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
6671 adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
6672
6673 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
6674 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
6675
6676 adapter->temp_dcb_cfg.pfc_mode_enable = false;
6677 adapter->dcb_cfg.pfc_mode_enable = false;
6678 }
6679
6680 ixgbe_init_interrupt_scheme(adapter);
6681 ixgbe_validate_rtr(adapter, tc);
6682 if (netif_running(dev))
6683 ixgbe_open(dev);
6684
6685 return 0;
6686 }
6687
6688 #endif /* CONFIG_IXGBE_DCB */
6689 void ixgbe_do_reset(struct net_device *netdev)
6690 {
6691 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6692
6693 if (netif_running(netdev))
6694 ixgbe_reinit_locked(adapter);
6695 else
6696 ixgbe_reset(adapter);
6697 }
6698
6699 static netdev_features_t ixgbe_fix_features(struct net_device *netdev,
6700 netdev_features_t features)
6701 {
6702 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6703
6704 #ifdef CONFIG_DCB
6705 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
6706 features &= ~NETIF_F_HW_VLAN_RX;
6707 #endif
6708
6709 /* return error if RXHASH is being enabled when RSS is not supported */
6710 if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED))
6711 features &= ~NETIF_F_RXHASH;
6712
6713 /* If Rx checksum is disabled, then RSC/LRO should also be disabled */
6714 if (!(features & NETIF_F_RXCSUM))
6715 features &= ~NETIF_F_LRO;
6716
6717 /* Turn off LRO if not RSC capable */
6718 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE))
6719 features &= ~NETIF_F_LRO;
6720
6721
6722 return features;
6723 }
6724
6725 static int ixgbe_set_features(struct net_device *netdev,
6726 netdev_features_t features)
6727 {
6728 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6729 netdev_features_t changed = netdev->features ^ features;
6730 bool need_reset = false;
6731
6732 /* Make sure RSC matches LRO, reset if change */
6733 if (!(features & NETIF_F_LRO)) {
6734 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
6735 need_reset = true;
6736 adapter->flags2 &= ~IXGBE_FLAG2_RSC_ENABLED;
6737 } else if ((adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE) &&
6738 !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)) {
6739 if (adapter->rx_itr_setting == 1 ||
6740 adapter->rx_itr_setting > IXGBE_MIN_RSC_ITR) {
6741 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
6742 need_reset = true;
6743 } else if ((changed ^ features) & NETIF_F_LRO) {
6744 e_info(probe, "rx-usecs set too low, "
6745 "disabling RSC\n");
6746 }
6747 }
6748
6749 /*
6750 * Check if Flow Director n-tuple support was enabled or disabled. If
6751 * the state changed, we need to reset.
6752 */
6753 if (!(features & NETIF_F_NTUPLE)) {
6754 if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
6755 /* turn off Flow Director, set ATR and reset */
6756 if ((adapter->flags & IXGBE_FLAG_RSS_ENABLED) &&
6757 !(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
6758 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
6759 need_reset = true;
6760 }
6761 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
6762 } else if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)) {
6763 /* turn off ATR, enable perfect filters and reset */
6764 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
6765 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
6766 need_reset = true;
6767 }
6768
6769 if (changed & NETIF_F_RXALL)
6770 need_reset = true;
6771
6772 netdev->features = features;
6773 if (need_reset)
6774 ixgbe_do_reset(netdev);
6775
6776 return 0;
6777 }
6778
6779 static int ixgbe_ndo_fdb_add(struct ndmsg *ndm,
6780 struct net_device *dev,
6781 unsigned char *addr,
6782 u16 flags)
6783 {
6784 struct ixgbe_adapter *adapter = netdev_priv(dev);
6785 int err = -EOPNOTSUPP;
6786
6787 if (ndm->ndm_state & NUD_PERMANENT) {
6788 pr_info("%s: FDB only supports static addresses\n",
6789 ixgbe_driver_name);
6790 return -EINVAL;
6791 }
6792
6793 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
6794 if (is_unicast_ether_addr(addr))
6795 err = dev_uc_add_excl(dev, addr);
6796 else if (is_multicast_ether_addr(addr))
6797 err = dev_mc_add_excl(dev, addr);
6798 else
6799 err = -EINVAL;
6800 }
6801
6802 /* Only return duplicate errors if NLM_F_EXCL is set */
6803 if (err == -EEXIST && !(flags & NLM_F_EXCL))
6804 err = 0;
6805
6806 return err;
6807 }
6808
6809 static int ixgbe_ndo_fdb_del(struct ndmsg *ndm,
6810 struct net_device *dev,
6811 unsigned char *addr)
6812 {
6813 struct ixgbe_adapter *adapter = netdev_priv(dev);
6814 int err = -EOPNOTSUPP;
6815
6816 if (ndm->ndm_state & NUD_PERMANENT) {
6817 pr_info("%s: FDB only supports static addresses\n",
6818 ixgbe_driver_name);
6819 return -EINVAL;
6820 }
6821
6822 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
6823 if (is_unicast_ether_addr(addr))
6824 err = dev_uc_del(dev, addr);
6825 else if (is_multicast_ether_addr(addr))
6826 err = dev_mc_del(dev, addr);
6827 else
6828 err = -EINVAL;
6829 }
6830
6831 return err;
6832 }
6833
6834 static int ixgbe_ndo_fdb_dump(struct sk_buff *skb,
6835 struct netlink_callback *cb,
6836 struct net_device *dev,
6837 int idx)
6838 {
6839 struct ixgbe_adapter *adapter = netdev_priv(dev);
6840
6841 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6842 idx = ndo_dflt_fdb_dump(skb, cb, dev, idx);
6843
6844 return idx;
6845 }
6846
6847 static const struct net_device_ops ixgbe_netdev_ops = {
6848 .ndo_open = ixgbe_open,
6849 .ndo_stop = ixgbe_close,
6850 .ndo_start_xmit = ixgbe_xmit_frame,
6851 .ndo_select_queue = ixgbe_select_queue,
6852 .ndo_set_rx_mode = ixgbe_set_rx_mode,
6853 .ndo_validate_addr = eth_validate_addr,
6854 .ndo_set_mac_address = ixgbe_set_mac,
6855 .ndo_change_mtu = ixgbe_change_mtu,
6856 .ndo_tx_timeout = ixgbe_tx_timeout,
6857 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
6858 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
6859 .ndo_do_ioctl = ixgbe_ioctl,
6860 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
6861 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
6862 .ndo_set_vf_tx_rate = ixgbe_ndo_set_vf_bw,
6863 .ndo_set_vf_spoofchk = ixgbe_ndo_set_vf_spoofchk,
6864 .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
6865 .ndo_get_stats64 = ixgbe_get_stats64,
6866 #ifdef CONFIG_IXGBE_DCB
6867 .ndo_setup_tc = ixgbe_setup_tc,
6868 #endif
6869 #ifdef CONFIG_NET_POLL_CONTROLLER
6870 .ndo_poll_controller = ixgbe_netpoll,
6871 #endif
6872 #ifdef IXGBE_FCOE
6873 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
6874 .ndo_fcoe_ddp_target = ixgbe_fcoe_ddp_target,
6875 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
6876 .ndo_fcoe_enable = ixgbe_fcoe_enable,
6877 .ndo_fcoe_disable = ixgbe_fcoe_disable,
6878 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
6879 .ndo_fcoe_get_hbainfo = ixgbe_fcoe_get_hbainfo,
6880 #endif /* IXGBE_FCOE */
6881 .ndo_set_features = ixgbe_set_features,
6882 .ndo_fix_features = ixgbe_fix_features,
6883 .ndo_fdb_add = ixgbe_ndo_fdb_add,
6884 .ndo_fdb_del = ixgbe_ndo_fdb_del,
6885 .ndo_fdb_dump = ixgbe_ndo_fdb_dump,
6886 };
6887
6888 static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter,
6889 const struct ixgbe_info *ii)
6890 {
6891 #ifdef CONFIG_PCI_IOV
6892 struct ixgbe_hw *hw = &adapter->hw;
6893
6894 if (hw->mac.type == ixgbe_mac_82598EB)
6895 return;
6896
6897 /* The 82599 supports up to 64 VFs per physical function
6898 * but this implementation limits allocation to 63 so that
6899 * basic networking resources are still available to the
6900 * physical function. If the user requests greater thn
6901 * 63 VFs then it is an error - reset to default of zero.
6902 */
6903 adapter->num_vfs = (max_vfs > 63) ? 0 : max_vfs;
6904 ixgbe_enable_sriov(adapter, ii);
6905 #endif /* CONFIG_PCI_IOV */
6906 }
6907
6908 /**
6909 * ixgbe_wol_supported - Check whether device supports WoL
6910 * @hw: hw specific details
6911 * @device_id: the device ID
6912 * @subdev_id: the subsystem device ID
6913 *
6914 * This function is used by probe and ethtool to determine
6915 * which devices have WoL support
6916 *
6917 **/
6918 int ixgbe_wol_supported(struct ixgbe_adapter *adapter, u16 device_id,
6919 u16 subdevice_id)
6920 {
6921 struct ixgbe_hw *hw = &adapter->hw;
6922 u16 wol_cap = adapter->eeprom_cap & IXGBE_DEVICE_CAPS_WOL_MASK;
6923 int is_wol_supported = 0;
6924
6925 switch (device_id) {
6926 case IXGBE_DEV_ID_82599_SFP:
6927 /* Only these subdevices could supports WOL */
6928 switch (subdevice_id) {
6929 case IXGBE_SUBDEV_ID_82599_560FLR:
6930 /* only support first port */
6931 if (hw->bus.func != 0)
6932 break;
6933 case IXGBE_SUBDEV_ID_82599_SFP:
6934 is_wol_supported = 1;
6935 break;
6936 }
6937 break;
6938 case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
6939 /* All except this subdevice support WOL */
6940 if (subdevice_id != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ)
6941 is_wol_supported = 1;
6942 break;
6943 case IXGBE_DEV_ID_82599_KX4:
6944 is_wol_supported = 1;
6945 break;
6946 case IXGBE_DEV_ID_X540T:
6947 /* check eeprom to see if enabled wol */
6948 if ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0_1) ||
6949 ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0) &&
6950 (hw->bus.func == 0))) {
6951 is_wol_supported = 1;
6952 }
6953 break;
6954 }
6955
6956 return is_wol_supported;
6957 }
6958
6959 /**
6960 * ixgbe_probe - Device Initialization Routine
6961 * @pdev: PCI device information struct
6962 * @ent: entry in ixgbe_pci_tbl
6963 *
6964 * Returns 0 on success, negative on failure
6965 *
6966 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
6967 * The OS initialization, configuring of the adapter private structure,
6968 * and a hardware reset occur.
6969 **/
6970 static int __devinit ixgbe_probe(struct pci_dev *pdev,
6971 const struct pci_device_id *ent)
6972 {
6973 struct net_device *netdev;
6974 struct ixgbe_adapter *adapter = NULL;
6975 struct ixgbe_hw *hw;
6976 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
6977 static int cards_found;
6978 int i, err, pci_using_dac;
6979 u8 part_str[IXGBE_PBANUM_LENGTH];
6980 unsigned int indices = num_possible_cpus();
6981 #ifdef IXGBE_FCOE
6982 u16 device_caps;
6983 #endif
6984 u32 eec;
6985
6986 /* Catch broken hardware that put the wrong VF device ID in
6987 * the PCIe SR-IOV capability.
6988 */
6989 if (pdev->is_virtfn) {
6990 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
6991 pci_name(pdev), pdev->vendor, pdev->device);
6992 return -EINVAL;
6993 }
6994
6995 err = pci_enable_device_mem(pdev);
6996 if (err)
6997 return err;
6998
6999 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
7000 !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
7001 pci_using_dac = 1;
7002 } else {
7003 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
7004 if (err) {
7005 err = dma_set_coherent_mask(&pdev->dev,
7006 DMA_BIT_MASK(32));
7007 if (err) {
7008 dev_err(&pdev->dev,
7009 "No usable DMA configuration, aborting\n");
7010 goto err_dma;
7011 }
7012 }
7013 pci_using_dac = 0;
7014 }
7015
7016 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
7017 IORESOURCE_MEM), ixgbe_driver_name);
7018 if (err) {
7019 dev_err(&pdev->dev,
7020 "pci_request_selected_regions failed 0x%x\n", err);
7021 goto err_pci_reg;
7022 }
7023
7024 pci_enable_pcie_error_reporting(pdev);
7025
7026 pci_set_master(pdev);
7027 pci_save_state(pdev);
7028
7029 #ifdef CONFIG_IXGBE_DCB
7030 indices *= MAX_TRAFFIC_CLASS;
7031 #endif
7032
7033 if (ii->mac == ixgbe_mac_82598EB)
7034 indices = min_t(unsigned int, indices, IXGBE_MAX_RSS_INDICES);
7035 else
7036 indices = min_t(unsigned int, indices, IXGBE_MAX_FDIR_INDICES);
7037
7038 #ifdef IXGBE_FCOE
7039 indices += min_t(unsigned int, num_possible_cpus(),
7040 IXGBE_MAX_FCOE_INDICES);
7041 #endif
7042 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
7043 if (!netdev) {
7044 err = -ENOMEM;
7045 goto err_alloc_etherdev;
7046 }
7047
7048 SET_NETDEV_DEV(netdev, &pdev->dev);
7049
7050 adapter = netdev_priv(netdev);
7051 pci_set_drvdata(pdev, adapter);
7052
7053 adapter->netdev = netdev;
7054 adapter->pdev = pdev;
7055 hw = &adapter->hw;
7056 hw->back = adapter;
7057 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
7058
7059 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
7060 pci_resource_len(pdev, 0));
7061 if (!hw->hw_addr) {
7062 err = -EIO;
7063 goto err_ioremap;
7064 }
7065
7066 for (i = 1; i <= 5; i++) {
7067 if (pci_resource_len(pdev, i) == 0)
7068 continue;
7069 }
7070
7071 netdev->netdev_ops = &ixgbe_netdev_ops;
7072 ixgbe_set_ethtool_ops(netdev);
7073 netdev->watchdog_timeo = 5 * HZ;
7074 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
7075
7076 adapter->bd_number = cards_found;
7077
7078 /* Setup hw api */
7079 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
7080 hw->mac.type = ii->mac;
7081
7082 /* EEPROM */
7083 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
7084 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
7085 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
7086 if (!(eec & (1 << 8)))
7087 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
7088
7089 /* PHY */
7090 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
7091 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
7092 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
7093 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
7094 hw->phy.mdio.mmds = 0;
7095 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
7096 hw->phy.mdio.dev = netdev;
7097 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
7098 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
7099
7100 ii->get_invariants(hw);
7101
7102 /* setup the private structure */
7103 err = ixgbe_sw_init(adapter);
7104 if (err)
7105 goto err_sw_init;
7106
7107 /* Make it possible the adapter to be woken up via WOL */
7108 switch (adapter->hw.mac.type) {
7109 case ixgbe_mac_82599EB:
7110 case ixgbe_mac_X540:
7111 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7112 break;
7113 default:
7114 break;
7115 }
7116
7117 /*
7118 * If there is a fan on this device and it has failed log the
7119 * failure.
7120 */
7121 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
7122 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
7123 if (esdp & IXGBE_ESDP_SDP1)
7124 e_crit(probe, "Fan has stopped, replace the adapter\n");
7125 }
7126
7127 if (allow_unsupported_sfp)
7128 hw->allow_unsupported_sfp = allow_unsupported_sfp;
7129
7130 /* reset_hw fills in the perm_addr as well */
7131 hw->phy.reset_if_overtemp = true;
7132 err = hw->mac.ops.reset_hw(hw);
7133 hw->phy.reset_if_overtemp = false;
7134 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
7135 hw->mac.type == ixgbe_mac_82598EB) {
7136 err = 0;
7137 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
7138 e_dev_err("failed to load because an unsupported SFP+ "
7139 "module type was detected.\n");
7140 e_dev_err("Reload the driver after installing a supported "
7141 "module.\n");
7142 goto err_sw_init;
7143 } else if (err) {
7144 e_dev_err("HW Init failed: %d\n", err);
7145 goto err_sw_init;
7146 }
7147
7148 ixgbe_probe_vf(adapter, ii);
7149
7150 netdev->features = NETIF_F_SG |
7151 NETIF_F_IP_CSUM |
7152 NETIF_F_IPV6_CSUM |
7153 NETIF_F_HW_VLAN_TX |
7154 NETIF_F_HW_VLAN_RX |
7155 NETIF_F_HW_VLAN_FILTER |
7156 NETIF_F_TSO |
7157 NETIF_F_TSO6 |
7158 NETIF_F_RXHASH |
7159 NETIF_F_RXCSUM;
7160
7161 netdev->hw_features = netdev->features;
7162
7163 switch (adapter->hw.mac.type) {
7164 case ixgbe_mac_82599EB:
7165 case ixgbe_mac_X540:
7166 netdev->features |= NETIF_F_SCTP_CSUM;
7167 netdev->hw_features |= NETIF_F_SCTP_CSUM |
7168 NETIF_F_NTUPLE;
7169 break;
7170 default:
7171 break;
7172 }
7173
7174 netdev->hw_features |= NETIF_F_RXALL;
7175
7176 netdev->vlan_features |= NETIF_F_TSO;
7177 netdev->vlan_features |= NETIF_F_TSO6;
7178 netdev->vlan_features |= NETIF_F_IP_CSUM;
7179 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
7180 netdev->vlan_features |= NETIF_F_SG;
7181
7182 netdev->priv_flags |= IFF_UNICAST_FLT;
7183 netdev->priv_flags |= IFF_SUPP_NOFCS;
7184
7185 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7186 adapter->flags &= ~(IXGBE_FLAG_RSS_ENABLED |
7187 IXGBE_FLAG_DCB_ENABLED);
7188
7189 #ifdef CONFIG_IXGBE_DCB
7190 netdev->dcbnl_ops = &dcbnl_ops;
7191 #endif
7192
7193 #ifdef IXGBE_FCOE
7194 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
7195 if (hw->mac.ops.get_device_caps) {
7196 hw->mac.ops.get_device_caps(hw, &device_caps);
7197 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
7198 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
7199 }
7200 }
7201 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
7202 netdev->vlan_features |= NETIF_F_FCOE_CRC;
7203 netdev->vlan_features |= NETIF_F_FSO;
7204 netdev->vlan_features |= NETIF_F_FCOE_MTU;
7205 }
7206 #endif /* IXGBE_FCOE */
7207 if (pci_using_dac) {
7208 netdev->features |= NETIF_F_HIGHDMA;
7209 netdev->vlan_features |= NETIF_F_HIGHDMA;
7210 }
7211
7212 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
7213 netdev->hw_features |= NETIF_F_LRO;
7214 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
7215 netdev->features |= NETIF_F_LRO;
7216
7217 /* make sure the EEPROM is good */
7218 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
7219 e_dev_err("The EEPROM Checksum Is Not Valid\n");
7220 err = -EIO;
7221 goto err_sw_init;
7222 }
7223
7224 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
7225 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
7226
7227 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
7228 e_dev_err("invalid MAC address\n");
7229 err = -EIO;
7230 goto err_sw_init;
7231 }
7232
7233 setup_timer(&adapter->service_timer, &ixgbe_service_timer,
7234 (unsigned long) adapter);
7235
7236 INIT_WORK(&adapter->service_task, ixgbe_service_task);
7237 clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
7238
7239 err = ixgbe_init_interrupt_scheme(adapter);
7240 if (err)
7241 goto err_sw_init;
7242
7243 if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED)) {
7244 netdev->hw_features &= ~NETIF_F_RXHASH;
7245 netdev->features &= ~NETIF_F_RXHASH;
7246 }
7247
7248 /* WOL not supported for all devices */
7249 adapter->wol = 0;
7250 hw->eeprom.ops.read(hw, 0x2c, &adapter->eeprom_cap);
7251 if (ixgbe_wol_supported(adapter, pdev->device, pdev->subsystem_device))
7252 adapter->wol = IXGBE_WUFC_MAG;
7253
7254 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
7255
7256 #ifdef CONFIG_IXGBE_PTP
7257 ixgbe_ptp_init(adapter);
7258 #endif /* CONFIG_IXGBE_PTP*/
7259
7260 /* save off EEPROM version number */
7261 hw->eeprom.ops.read(hw, 0x2e, &adapter->eeprom_verh);
7262 hw->eeprom.ops.read(hw, 0x2d, &adapter->eeprom_verl);
7263
7264 /* pick up the PCI bus settings for reporting later */
7265 hw->mac.ops.get_bus_info(hw);
7266
7267 /* print bus type/speed/width info */
7268 e_dev_info("(PCI Express:%s:%s) %pM\n",
7269 (hw->bus.speed == ixgbe_bus_speed_5000 ? "5.0GT/s" :
7270 hw->bus.speed == ixgbe_bus_speed_2500 ? "2.5GT/s" :
7271 "Unknown"),
7272 (hw->bus.width == ixgbe_bus_width_pcie_x8 ? "Width x8" :
7273 hw->bus.width == ixgbe_bus_width_pcie_x4 ? "Width x4" :
7274 hw->bus.width == ixgbe_bus_width_pcie_x1 ? "Width x1" :
7275 "Unknown"),
7276 netdev->dev_addr);
7277
7278 err = ixgbe_read_pba_string_generic(hw, part_str, IXGBE_PBANUM_LENGTH);
7279 if (err)
7280 strncpy(part_str, "Unknown", IXGBE_PBANUM_LENGTH);
7281 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
7282 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, PBA No: %s\n",
7283 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
7284 part_str);
7285 else
7286 e_dev_info("MAC: %d, PHY: %d, PBA No: %s\n",
7287 hw->mac.type, hw->phy.type, part_str);
7288
7289 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
7290 e_dev_warn("PCI-Express bandwidth available for this card is "
7291 "not sufficient for optimal performance.\n");
7292 e_dev_warn("For optimal performance a x8 PCI-Express slot "
7293 "is required.\n");
7294 }
7295
7296 /* reset the hardware with the new settings */
7297 err = hw->mac.ops.start_hw(hw);
7298 if (err == IXGBE_ERR_EEPROM_VERSION) {
7299 /* We are running on a pre-production device, log a warning */
7300 e_dev_warn("This device is a pre-production adapter/LOM. "
7301 "Please be aware there may be issues associated "
7302 "with your hardware. If you are experiencing "
7303 "problems please contact your Intel or hardware "
7304 "representative who provided you with this "
7305 "hardware.\n");
7306 }
7307 strcpy(netdev->name, "eth%d");
7308 err = register_netdev(netdev);
7309 if (err)
7310 goto err_register;
7311
7312 /* power down the optics for multispeed fiber and 82599 SFP+ fiber */
7313 if (hw->mac.ops.disable_tx_laser &&
7314 ((hw->phy.multispeed_fiber) ||
7315 ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
7316 (hw->mac.type == ixgbe_mac_82599EB))))
7317 hw->mac.ops.disable_tx_laser(hw);
7318
7319 /* carrier off reporting is important to ethtool even BEFORE open */
7320 netif_carrier_off(netdev);
7321
7322 #ifdef CONFIG_IXGBE_DCA
7323 if (dca_add_requester(&pdev->dev) == 0) {
7324 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
7325 ixgbe_setup_dca(adapter);
7326 }
7327 #endif
7328 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
7329 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
7330 for (i = 0; i < adapter->num_vfs; i++)
7331 ixgbe_vf_configuration(pdev, (i | 0x10000000));
7332 }
7333
7334 /* firmware requires driver version to be 0xFFFFFFFF
7335 * since os does not support feature
7336 */
7337 if (hw->mac.ops.set_fw_drv_ver)
7338 hw->mac.ops.set_fw_drv_ver(hw, 0xFF, 0xFF, 0xFF,
7339 0xFF);
7340
7341 /* add san mac addr to netdev */
7342 ixgbe_add_sanmac_netdev(netdev);
7343
7344 e_dev_info("%s\n", ixgbe_default_device_descr);
7345 cards_found++;
7346
7347 #ifdef CONFIG_IXGBE_HWMON
7348 if (ixgbe_sysfs_init(adapter))
7349 e_err(probe, "failed to allocate sysfs resources\n");
7350 #endif /* CONFIG_IXGBE_HWMON */
7351
7352 return 0;
7353
7354 err_register:
7355 ixgbe_release_hw_control(adapter);
7356 ixgbe_clear_interrupt_scheme(adapter);
7357 err_sw_init:
7358 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7359 ixgbe_disable_sriov(adapter);
7360 adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
7361 iounmap(hw->hw_addr);
7362 err_ioremap:
7363 free_netdev(netdev);
7364 err_alloc_etherdev:
7365 pci_release_selected_regions(pdev,
7366 pci_select_bars(pdev, IORESOURCE_MEM));
7367 err_pci_reg:
7368 err_dma:
7369 pci_disable_device(pdev);
7370 return err;
7371 }
7372
7373 /**
7374 * ixgbe_remove - Device Removal Routine
7375 * @pdev: PCI device information struct
7376 *
7377 * ixgbe_remove is called by the PCI subsystem to alert the driver
7378 * that it should release a PCI device. The could be caused by a
7379 * Hot-Plug event, or because the driver is going to be removed from
7380 * memory.
7381 **/
7382 static void __devexit ixgbe_remove(struct pci_dev *pdev)
7383 {
7384 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7385 struct net_device *netdev = adapter->netdev;
7386
7387 set_bit(__IXGBE_DOWN, &adapter->state);
7388 cancel_work_sync(&adapter->service_task);
7389
7390 #ifdef CONFIG_IXGBE_PTP
7391 ixgbe_ptp_stop(adapter);
7392 #endif
7393
7394 #ifdef CONFIG_IXGBE_DCA
7395 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
7396 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
7397 dca_remove_requester(&pdev->dev);
7398 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
7399 }
7400
7401 #endif
7402 #ifdef CONFIG_IXGBE_HWMON
7403 ixgbe_sysfs_exit(adapter);
7404 #endif /* CONFIG_IXGBE_HWMON */
7405
7406 #ifdef IXGBE_FCOE
7407 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
7408 ixgbe_cleanup_fcoe(adapter);
7409
7410 #endif /* IXGBE_FCOE */
7411
7412 /* remove the added san mac */
7413 ixgbe_del_sanmac_netdev(netdev);
7414
7415 if (netdev->reg_state == NETREG_REGISTERED)
7416 unregister_netdev(netdev);
7417
7418 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
7419 if (!(ixgbe_check_vf_assignment(adapter)))
7420 ixgbe_disable_sriov(adapter);
7421 else
7422 e_dev_warn("Unloading driver while VFs are assigned "
7423 "- VFs will not be deallocated\n");
7424 }
7425
7426 ixgbe_clear_interrupt_scheme(adapter);
7427
7428 ixgbe_release_hw_control(adapter);
7429
7430 #ifdef CONFIG_DCB
7431 kfree(adapter->ixgbe_ieee_pfc);
7432 kfree(adapter->ixgbe_ieee_ets);
7433
7434 #endif
7435 iounmap(adapter->hw.hw_addr);
7436 pci_release_selected_regions(pdev, pci_select_bars(pdev,
7437 IORESOURCE_MEM));
7438
7439 e_dev_info("complete\n");
7440
7441 free_netdev(netdev);
7442
7443 pci_disable_pcie_error_reporting(pdev);
7444
7445 pci_disable_device(pdev);
7446 }
7447
7448 /**
7449 * ixgbe_io_error_detected - called when PCI error is detected
7450 * @pdev: Pointer to PCI device
7451 * @state: The current pci connection state
7452 *
7453 * This function is called after a PCI bus error affecting
7454 * this device has been detected.
7455 */
7456 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
7457 pci_channel_state_t state)
7458 {
7459 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7460 struct net_device *netdev = adapter->netdev;
7461
7462 #ifdef CONFIG_PCI_IOV
7463 struct pci_dev *bdev, *vfdev;
7464 u32 dw0, dw1, dw2, dw3;
7465 int vf, pos;
7466 u16 req_id, pf_func;
7467
7468 if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
7469 adapter->num_vfs == 0)
7470 goto skip_bad_vf_detection;
7471
7472 bdev = pdev->bus->self;
7473 while (bdev && (bdev->pcie_type != PCI_EXP_TYPE_ROOT_PORT))
7474 bdev = bdev->bus->self;
7475
7476 if (!bdev)
7477 goto skip_bad_vf_detection;
7478
7479 pos = pci_find_ext_capability(bdev, PCI_EXT_CAP_ID_ERR);
7480 if (!pos)
7481 goto skip_bad_vf_detection;
7482
7483 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG, &dw0);
7484 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 4, &dw1);
7485 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 8, &dw2);
7486 pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 12, &dw3);
7487
7488 req_id = dw1 >> 16;
7489 /* On the 82599 if bit 7 of the requestor ID is set then it's a VF */
7490 if (!(req_id & 0x0080))
7491 goto skip_bad_vf_detection;
7492
7493 pf_func = req_id & 0x01;
7494 if ((pf_func & 1) == (pdev->devfn & 1)) {
7495 unsigned int device_id;
7496
7497 vf = (req_id & 0x7F) >> 1;
7498 e_dev_err("VF %d has caused a PCIe error\n", vf);
7499 e_dev_err("TLP: dw0: %8.8x\tdw1: %8.8x\tdw2: "
7500 "%8.8x\tdw3: %8.8x\n",
7501 dw0, dw1, dw2, dw3);
7502 switch (adapter->hw.mac.type) {
7503 case ixgbe_mac_82599EB:
7504 device_id = IXGBE_82599_VF_DEVICE_ID;
7505 break;
7506 case ixgbe_mac_X540:
7507 device_id = IXGBE_X540_VF_DEVICE_ID;
7508 break;
7509 default:
7510 device_id = 0;
7511 break;
7512 }
7513
7514 /* Find the pci device of the offending VF */
7515 vfdev = pci_get_device(IXGBE_INTEL_VENDOR_ID, device_id, NULL);
7516 while (vfdev) {
7517 if (vfdev->devfn == (req_id & 0xFF))
7518 break;
7519 vfdev = pci_get_device(IXGBE_INTEL_VENDOR_ID,
7520 device_id, vfdev);
7521 }
7522 /*
7523 * There's a slim chance the VF could have been hot plugged,
7524 * so if it is no longer present we don't need to issue the
7525 * VFLR. Just clean up the AER in that case.
7526 */
7527 if (vfdev) {
7528 e_dev_err("Issuing VFLR to VF %d\n", vf);
7529 pci_write_config_dword(vfdev, 0xA8, 0x00008000);
7530 }
7531
7532 pci_cleanup_aer_uncorrect_error_status(pdev);
7533 }
7534
7535 /*
7536 * Even though the error may have occurred on the other port
7537 * we still need to increment the vf error reference count for
7538 * both ports because the I/O resume function will be called
7539 * for both of them.
7540 */
7541 adapter->vferr_refcount++;
7542
7543 return PCI_ERS_RESULT_RECOVERED;
7544
7545 skip_bad_vf_detection:
7546 #endif /* CONFIG_PCI_IOV */
7547 netif_device_detach(netdev);
7548
7549 if (state == pci_channel_io_perm_failure)
7550 return PCI_ERS_RESULT_DISCONNECT;
7551
7552 if (netif_running(netdev))
7553 ixgbe_down(adapter);
7554 pci_disable_device(pdev);
7555
7556 /* Request a slot reset. */
7557 return PCI_ERS_RESULT_NEED_RESET;
7558 }
7559
7560 /**
7561 * ixgbe_io_slot_reset - called after the pci bus has been reset.
7562 * @pdev: Pointer to PCI device
7563 *
7564 * Restart the card from scratch, as if from a cold-boot.
7565 */
7566 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
7567 {
7568 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7569 pci_ers_result_t result;
7570 int err;
7571
7572 if (pci_enable_device_mem(pdev)) {
7573 e_err(probe, "Cannot re-enable PCI device after reset.\n");
7574 result = PCI_ERS_RESULT_DISCONNECT;
7575 } else {
7576 pci_set_master(pdev);
7577 pci_restore_state(pdev);
7578 pci_save_state(pdev);
7579
7580 pci_wake_from_d3(pdev, false);
7581
7582 ixgbe_reset(adapter);
7583 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7584 result = PCI_ERS_RESULT_RECOVERED;
7585 }
7586
7587 err = pci_cleanup_aer_uncorrect_error_status(pdev);
7588 if (err) {
7589 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
7590 "failed 0x%0x\n", err);
7591 /* non-fatal, continue */
7592 }
7593
7594 return result;
7595 }
7596
7597 /**
7598 * ixgbe_io_resume - called when traffic can start flowing again.
7599 * @pdev: Pointer to PCI device
7600 *
7601 * This callback is called when the error recovery driver tells us that
7602 * its OK to resume normal operation.
7603 */
7604 static void ixgbe_io_resume(struct pci_dev *pdev)
7605 {
7606 struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7607 struct net_device *netdev = adapter->netdev;
7608
7609 #ifdef CONFIG_PCI_IOV
7610 if (adapter->vferr_refcount) {
7611 e_info(drv, "Resuming after VF err\n");
7612 adapter->vferr_refcount--;
7613 return;
7614 }
7615
7616 #endif
7617 if (netif_running(netdev))
7618 ixgbe_up(adapter);
7619
7620 netif_device_attach(netdev);
7621 }
7622
7623 static struct pci_error_handlers ixgbe_err_handler = {
7624 .error_detected = ixgbe_io_error_detected,
7625 .slot_reset = ixgbe_io_slot_reset,
7626 .resume = ixgbe_io_resume,
7627 };
7628
7629 static struct pci_driver ixgbe_driver = {
7630 .name = ixgbe_driver_name,
7631 .id_table = ixgbe_pci_tbl,
7632 .probe = ixgbe_probe,
7633 .remove = __devexit_p(ixgbe_remove),
7634 #ifdef CONFIG_PM
7635 .suspend = ixgbe_suspend,
7636 .resume = ixgbe_resume,
7637 #endif
7638 .shutdown = ixgbe_shutdown,
7639 .err_handler = &ixgbe_err_handler
7640 };
7641
7642 /**
7643 * ixgbe_init_module - Driver Registration Routine
7644 *
7645 * ixgbe_init_module is the first routine called when the driver is
7646 * loaded. All it does is register with the PCI subsystem.
7647 **/
7648 static int __init ixgbe_init_module(void)
7649 {
7650 int ret;
7651 pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
7652 pr_info("%s\n", ixgbe_copyright);
7653
7654 #ifdef CONFIG_IXGBE_DCA
7655 dca_register_notify(&dca_notifier);
7656 #endif
7657
7658 ret = pci_register_driver(&ixgbe_driver);
7659 return ret;
7660 }
7661
7662 module_init(ixgbe_init_module);
7663
7664 /**
7665 * ixgbe_exit_module - Driver Exit Cleanup Routine
7666 *
7667 * ixgbe_exit_module is called just before the driver is removed
7668 * from memory.
7669 **/
7670 static void __exit ixgbe_exit_module(void)
7671 {
7672 #ifdef CONFIG_IXGBE_DCA
7673 dca_unregister_notify(&dca_notifier);
7674 #endif
7675 pci_unregister_driver(&ixgbe_driver);
7676 rcu_barrier(); /* Wait for completion of call_rcu()'s */
7677 }
7678
7679 #ifdef CONFIG_IXGBE_DCA
7680 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
7681 void *p)
7682 {
7683 int ret_val;
7684
7685 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
7686 __ixgbe_notify_dca);
7687
7688 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
7689 }
7690
7691 #endif /* CONFIG_IXGBE_DCA */
7692
7693 module_exit(ixgbe_exit_module);
7694
7695 /* ixgbe_main.c */
Linux kernel - Deliverables
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