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ixgbe: update set_rx_mode to fix issues w/ macvlan
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / ixgbe / ixgbe_main.c
blobebc4b04fdef21b865f1f2aaf012ea6a03fd276d0
1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2010 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26 *******************************************************************************/
27
28 #include <linux/types.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/netdevice.h>
32 #include <linux/vmalloc.h>
33 #include <linux/string.h>
34 #include <linux/in.h>
35 #include <linux/ip.h>
36 #include <linux/tcp.h>
37 #include <linux/pkt_sched.h>
38 #include <linux/ipv6.h>
39 #include <linux/slab.h>
40 #include <net/checksum.h>
41 #include <net/ip6_checksum.h>
42 #include <linux/ethtool.h>
43 #include <linux/if_vlan.h>
44 #include <scsi/fc/fc_fcoe.h>
45
46 #include "ixgbe.h"
47 #include "ixgbe_common.h"
48 #include "ixgbe_dcb_82599.h"
49 #include "ixgbe_sriov.h"
50
51 char ixgbe_driver_name[] = "ixgbe";
52 static const char ixgbe_driver_string[] =
53 "Intel(R) 10 Gigabit PCI Express Network Driver";
54
55 #define DRV_VERSION "2.0.62-k2"
56 const char ixgbe_driver_version[] = DRV_VERSION;
57 static char ixgbe_copyright[] = "Copyright (c) 1999-2010 Intel Corporation.";
58
59 static const struct ixgbe_info *ixgbe_info_tbl[] = {
60 [board_82598] = &ixgbe_82598_info,
61 [board_82599] = &ixgbe_82599_info,
62 };
63
64 /* ixgbe_pci_tbl - PCI Device ID Table
65 *
66 * Wildcard entries (PCI_ANY_ID) should come last
67 * Last entry must be all 0s
68 *
69 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
70 * Class, Class Mask, private data (not used) }
71 */
72 static DEFINE_PCI_DEVICE_TABLE(ixgbe_pci_tbl) = {
73 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598),
74 board_82598 },
75 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
76 board_82598 },
77 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
78 board_82598 },
79 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT),
80 board_82598 },
81 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2),
82 board_82598 },
83 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
84 board_82598 },
85 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT),
86 board_82598 },
87 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT),
88 board_82598 },
89 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM),
90 board_82598 },
91 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR),
92 board_82598 },
93 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM),
94 board_82598 },
95 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX),
96 board_82598 },
97 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4),
98 board_82599 },
99 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM),
100 board_82599 },
101 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR),
102 board_82599 },
103 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP),
104 board_82599 },
105 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM),
106 board_82599 },
107 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ),
108 board_82599 },
109 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4),
110 board_82599 },
111 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM),
112 board_82599 },
113 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE),
114 board_82599 },
115
116 /* required last entry */
117 {0, }
118 };
119 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
120
121 #ifdef CONFIG_IXGBE_DCA
122 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
123 void *p);
124 static struct notifier_block dca_notifier = {
125 .notifier_call = ixgbe_notify_dca,
126 .next = NULL,
127 .priority = 0
128 };
129 #endif
130
131 #ifdef CONFIG_PCI_IOV
132 static unsigned int max_vfs;
133 module_param(max_vfs, uint, 0);
134 MODULE_PARM_DESC(max_vfs, "Maximum number of virtual functions to allocate "
135 "per physical function");
136 #endif /* CONFIG_PCI_IOV */
137
138 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
139 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
140 MODULE_LICENSE("GPL");
141 MODULE_VERSION(DRV_VERSION);
142
143 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
144
145 static inline void ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
146 {
147 struct ixgbe_hw *hw = &adapter->hw;
148 u32 gcr;
149 u32 gpie;
150 u32 vmdctl;
151
152 #ifdef CONFIG_PCI_IOV
153 /* disable iov and allow time for transactions to clear */
154 pci_disable_sriov(adapter->pdev);
155 #endif
156
157 /* turn off device IOV mode */
158 gcr = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
159 gcr &= ~(IXGBE_GCR_EXT_SRIOV);
160 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr);
161 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
162 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
163 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
164
165 /* set default pool back to 0 */
166 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
167 vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
168 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
169
170 /* take a breather then clean up driver data */
171 msleep(100);
172 if (adapter->vfinfo)
173 kfree(adapter->vfinfo);
174 adapter->vfinfo = NULL;
175
176 adapter->num_vfs = 0;
177 adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
178 }
179
180 struct ixgbe_reg_info {
181 u32 ofs;
182 char *name;
183 };
184
185 static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {
186
187 /* General Registers */
188 {IXGBE_CTRL, "CTRL"},
189 {IXGBE_STATUS, "STATUS"},
190 {IXGBE_CTRL_EXT, "CTRL_EXT"},
191
192 /* Interrupt Registers */
193 {IXGBE_EICR, "EICR"},
194
195 /* RX Registers */
196 {IXGBE_SRRCTL(0), "SRRCTL"},
197 {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
198 {IXGBE_RDLEN(0), "RDLEN"},
199 {IXGBE_RDH(0), "RDH"},
200 {IXGBE_RDT(0), "RDT"},
201 {IXGBE_RXDCTL(0), "RXDCTL"},
202 {IXGBE_RDBAL(0), "RDBAL"},
203 {IXGBE_RDBAH(0), "RDBAH"},
204
205 /* TX Registers */
206 {IXGBE_TDBAL(0), "TDBAL"},
207 {IXGBE_TDBAH(0), "TDBAH"},
208 {IXGBE_TDLEN(0), "TDLEN"},
209 {IXGBE_TDH(0), "TDH"},
210 {IXGBE_TDT(0), "TDT"},
211 {IXGBE_TXDCTL(0), "TXDCTL"},
212
213 /* List Terminator */
214 {}
215 };
216
217
218 /*
219 * ixgbe_regdump - register printout routine
220 */
221 static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
222 {
223 int i = 0, j = 0;
224 char rname[16];
225 u32 regs[64];
226
227 switch (reginfo->ofs) {
228 case IXGBE_SRRCTL(0):
229 for (i = 0; i < 64; i++)
230 regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
231 break;
232 case IXGBE_DCA_RXCTRL(0):
233 for (i = 0; i < 64; i++)
234 regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
235 break;
236 case IXGBE_RDLEN(0):
237 for (i = 0; i < 64; i++)
238 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
239 break;
240 case IXGBE_RDH(0):
241 for (i = 0; i < 64; i++)
242 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
243 break;
244 case IXGBE_RDT(0):
245 for (i = 0; i < 64; i++)
246 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
247 break;
248 case IXGBE_RXDCTL(0):
249 for (i = 0; i < 64; i++)
250 regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
251 break;
252 case IXGBE_RDBAL(0):
253 for (i = 0; i < 64; i++)
254 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
255 break;
256 case IXGBE_RDBAH(0):
257 for (i = 0; i < 64; i++)
258 regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
259 break;
260 case IXGBE_TDBAL(0):
261 for (i = 0; i < 64; i++)
262 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
263 break;
264 case IXGBE_TDBAH(0):
265 for (i = 0; i < 64; i++)
266 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
267 break;
268 case IXGBE_TDLEN(0):
269 for (i = 0; i < 64; i++)
270 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
271 break;
272 case IXGBE_TDH(0):
273 for (i = 0; i < 64; i++)
274 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
275 break;
276 case IXGBE_TDT(0):
277 for (i = 0; i < 64; i++)
278 regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
279 break;
280 case IXGBE_TXDCTL(0):
281 for (i = 0; i < 64; i++)
282 regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
283 break;
284 default:
285 printk(KERN_INFO "%-15s %08x\n", reginfo->name,
286 IXGBE_READ_REG(hw, reginfo->ofs));
287 return;
288 }
289
290 for (i = 0; i < 8; i++) {
291 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7);
292 printk(KERN_ERR "%-15s ", rname);
293 for (j = 0; j < 8; j++)
294 printk(KERN_CONT "%08x ", regs[i*8+j]);
295 printk(KERN_CONT "\n");
296 }
297
298 }
299
300 /*
301 * ixgbe_dump - Print registers, tx-rings and rx-rings
302 */
303 static void ixgbe_dump(struct ixgbe_adapter *adapter)
304 {
305 struct net_device *netdev = adapter->netdev;
306 struct ixgbe_hw *hw = &adapter->hw;
307 struct ixgbe_reg_info *reginfo;
308 int n = 0;
309 struct ixgbe_ring *tx_ring;
310 struct ixgbe_tx_buffer *tx_buffer_info;
311 union ixgbe_adv_tx_desc *tx_desc;
312 struct my_u0 { u64 a; u64 b; } *u0;
313 struct ixgbe_ring *rx_ring;
314 union ixgbe_adv_rx_desc *rx_desc;
315 struct ixgbe_rx_buffer *rx_buffer_info;
316 u32 staterr;
317 int i = 0;
318
319 if (!netif_msg_hw(adapter))
320 return;
321
322 /* Print netdevice Info */
323 if (netdev) {
324 dev_info(&adapter->pdev->dev, "Net device Info\n");
325 printk(KERN_INFO "Device Name state "
326 "trans_start last_rx\n");
327 printk(KERN_INFO "%-15s %016lX %016lX %016lX\n",
328 netdev->name,
329 netdev->state,
330 netdev->trans_start,
331 netdev->last_rx);
332 }
333
334 /* Print Registers */
335 dev_info(&adapter->pdev->dev, "Register Dump\n");
336 printk(KERN_INFO " Register Name Value\n");
337 for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
338 reginfo->name; reginfo++) {
339 ixgbe_regdump(hw, reginfo);
340 }
341
342 /* Print TX Ring Summary */
343 if (!netdev || !netif_running(netdev))
344 goto exit;
345
346 dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
347 printk(KERN_INFO "Queue [NTU] [NTC] [bi(ntc)->dma ] "
348 "leng ntw timestamp\n");
349 for (n = 0; n < adapter->num_tx_queues; n++) {
350 tx_ring = adapter->tx_ring[n];
351 tx_buffer_info =
352 &tx_ring->tx_buffer_info[tx_ring->next_to_clean];
353 printk(KERN_INFO " %5d %5X %5X %016llX %04X %3X %016llX\n",
354 n, tx_ring->next_to_use, tx_ring->next_to_clean,
355 (u64)tx_buffer_info->dma,
356 tx_buffer_info->length,
357 tx_buffer_info->next_to_watch,
358 (u64)tx_buffer_info->time_stamp);
359 }
360
361 /* Print TX Rings */
362 if (!netif_msg_tx_done(adapter))
363 goto rx_ring_summary;
364
365 dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
366
367 /* Transmit Descriptor Formats
368 *
369 * Advanced Transmit Descriptor
370 * +--------------------------------------------------------------+
371 * 0 | Buffer Address [63:0] |
372 * +--------------------------------------------------------------+
373 * 8 | PAYLEN | PORTS | IDX | STA | DCMD |DTYP | RSV | DTALEN |
374 * +--------------------------------------------------------------+
375 * 63 46 45 40 39 36 35 32 31 24 23 20 19 0
376 */
377
378 for (n = 0; n < adapter->num_tx_queues; n++) {
379 tx_ring = adapter->tx_ring[n];
380 printk(KERN_INFO "------------------------------------\n");
381 printk(KERN_INFO "TX QUEUE INDEX = %d\n", tx_ring->queue_index);
382 printk(KERN_INFO "------------------------------------\n");
383 printk(KERN_INFO "T [desc] [address 63:0 ] "
384 "[PlPOIdStDDt Ln] [bi->dma ] "
385 "leng ntw timestamp bi->skb\n");
386
387 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
388 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
389 tx_buffer_info = &tx_ring->tx_buffer_info[i];
390 u0 = (struct my_u0 *)tx_desc;
391 printk(KERN_INFO "T [0x%03X] %016llX %016llX %016llX"
392 " %04X %3X %016llX %p", i,
393 le64_to_cpu(u0->a),
394 le64_to_cpu(u0->b),
395 (u64)tx_buffer_info->dma,
396 tx_buffer_info->length,
397 tx_buffer_info->next_to_watch,
398 (u64)tx_buffer_info->time_stamp,
399 tx_buffer_info->skb);
400 if (i == tx_ring->next_to_use &&
401 i == tx_ring->next_to_clean)
402 printk(KERN_CONT " NTC/U\n");
403 else if (i == tx_ring->next_to_use)
404 printk(KERN_CONT " NTU\n");
405 else if (i == tx_ring->next_to_clean)
406 printk(KERN_CONT " NTC\n");
407 else
408 printk(KERN_CONT "\n");
409
410 if (netif_msg_pktdata(adapter) &&
411 tx_buffer_info->dma != 0)
412 print_hex_dump(KERN_INFO, "",
413 DUMP_PREFIX_ADDRESS, 16, 1,
414 phys_to_virt(tx_buffer_info->dma),
415 tx_buffer_info->length, true);
416 }
417 }
418
419 /* Print RX Rings Summary */
420 rx_ring_summary:
421 dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
422 printk(KERN_INFO "Queue [NTU] [NTC]\n");
423 for (n = 0; n < adapter->num_rx_queues; n++) {
424 rx_ring = adapter->rx_ring[n];
425 printk(KERN_INFO "%5d %5X %5X\n", n,
426 rx_ring->next_to_use, rx_ring->next_to_clean);
427 }
428
429 /* Print RX Rings */
430 if (!netif_msg_rx_status(adapter))
431 goto exit;
432
433 dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
434
435 /* Advanced Receive Descriptor (Read) Format
436 * 63 1 0
437 * +-----------------------------------------------------+
438 * 0 | Packet Buffer Address [63:1] |A0/NSE|
439 * +----------------------------------------------+------+
440 * 8 | Header Buffer Address [63:1] | DD |
441 * +-----------------------------------------------------+
442 *
443 *
444 * Advanced Receive Descriptor (Write-Back) Format
445 *
446 * 63 48 47 32 31 30 21 20 16 15 4 3 0
447 * +------------------------------------------------------+
448 * 0 | Packet IP |SPH| HDR_LEN | RSV|Packet| RSS |
449 * | Checksum Ident | | | | Type | Type |
450 * +------------------------------------------------------+
451 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
452 * +------------------------------------------------------+
453 * 63 48 47 32 31 20 19 0
454 */
455 for (n = 0; n < adapter->num_rx_queues; n++) {
456 rx_ring = adapter->rx_ring[n];
457 printk(KERN_INFO "------------------------------------\n");
458 printk(KERN_INFO "RX QUEUE INDEX = %d\n", rx_ring->queue_index);
459 printk(KERN_INFO "------------------------------------\n");
460 printk(KERN_INFO "R [desc] [ PktBuf A0] "
461 "[ HeadBuf DD] [bi->dma ] [bi->skb] "
462 "<-- Adv Rx Read format\n");
463 printk(KERN_INFO "RWB[desc] [PcsmIpSHl PtRs] "
464 "[vl er S cks ln] ---------------- [bi->skb] "
465 "<-- Adv Rx Write-Back format\n");
466
467 for (i = 0; i < rx_ring->count; i++) {
468 rx_buffer_info = &rx_ring->rx_buffer_info[i];
469 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
470 u0 = (struct my_u0 *)rx_desc;
471 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
472 if (staterr & IXGBE_RXD_STAT_DD) {
473 /* Descriptor Done */
474 printk(KERN_INFO "RWB[0x%03X] %016llX "
475 "%016llX ---------------- %p", i,
476 le64_to_cpu(u0->a),
477 le64_to_cpu(u0->b),
478 rx_buffer_info->skb);
479 } else {
480 printk(KERN_INFO "R [0x%03X] %016llX "
481 "%016llX %016llX %p", i,
482 le64_to_cpu(u0->a),
483 le64_to_cpu(u0->b),
484 (u64)rx_buffer_info->dma,
485 rx_buffer_info->skb);
486
487 if (netif_msg_pktdata(adapter)) {
488 print_hex_dump(KERN_INFO, "",
489 DUMP_PREFIX_ADDRESS, 16, 1,
490 phys_to_virt(rx_buffer_info->dma),
491 rx_ring->rx_buf_len, true);
492
493 if (rx_ring->rx_buf_len
494 < IXGBE_RXBUFFER_2048)
495 print_hex_dump(KERN_INFO, "",
496 DUMP_PREFIX_ADDRESS, 16, 1,
497 phys_to_virt(
498 rx_buffer_info->page_dma +
499 rx_buffer_info->page_offset
500 ),
501 PAGE_SIZE/2, true);
502 }
503 }
504
505 if (i == rx_ring->next_to_use)
506 printk(KERN_CONT " NTU\n");
507 else if (i == rx_ring->next_to_clean)
508 printk(KERN_CONT " NTC\n");
509 else
510 printk(KERN_CONT "\n");
511
512 }
513 }
514
515 exit:
516 return;
517 }
518
519 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
520 {
521 u32 ctrl_ext;
522
523 /* Let firmware take over control of h/w */
524 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
525 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
526 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
527 }
528
529 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
530 {
531 u32 ctrl_ext;
532
533 /* Let firmware know the driver has taken over */
534 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
535 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
536 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
537 }
538
539 /*
540 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
541 * @adapter: pointer to adapter struct
542 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
543 * @queue: queue to map the corresponding interrupt to
544 * @msix_vector: the vector to map to the corresponding queue
545 *
546 */
547 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
548 u8 queue, u8 msix_vector)
549 {
550 u32 ivar, index;
551 struct ixgbe_hw *hw = &adapter->hw;
552 switch (hw->mac.type) {
553 case ixgbe_mac_82598EB:
554 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
555 if (direction == -1)
556 direction = 0;
557 index = (((direction * 64) + queue) >> 2) & 0x1F;
558 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
559 ivar &= ~(0xFF << (8 * (queue & 0x3)));
560 ivar |= (msix_vector << (8 * (queue & 0x3)));
561 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
562 break;
563 case ixgbe_mac_82599EB:
564 if (direction == -1) {
565 /* other causes */
566 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
567 index = ((queue & 1) * 8);
568 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
569 ivar &= ~(0xFF << index);
570 ivar |= (msix_vector << index);
571 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
572 break;
573 } else {
574 /* tx or rx causes */
575 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
576 index = ((16 * (queue & 1)) + (8 * direction));
577 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
578 ivar &= ~(0xFF << index);
579 ivar |= (msix_vector << index);
580 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
581 break;
582 }
583 default:
584 break;
585 }
586 }
587
588 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
589 u64 qmask)
590 {
591 u32 mask;
592
593 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
594 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
595 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
596 } else {
597 mask = (qmask & 0xFFFFFFFF);
598 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
599 mask = (qmask >> 32);
600 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
601 }
602 }
603
604 static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
605 struct ixgbe_tx_buffer
606 *tx_buffer_info)
607 {
608 if (tx_buffer_info->dma) {
609 if (tx_buffer_info->mapped_as_page)
610 dma_unmap_page(&adapter->pdev->dev,
611 tx_buffer_info->dma,
612 tx_buffer_info->length,
613 DMA_TO_DEVICE);
614 else
615 dma_unmap_single(&adapter->pdev->dev,
616 tx_buffer_info->dma,
617 tx_buffer_info->length,
618 DMA_TO_DEVICE);
619 tx_buffer_info->dma = 0;
620 }
621 if (tx_buffer_info->skb) {
622 dev_kfree_skb_any(tx_buffer_info->skb);
623 tx_buffer_info->skb = NULL;
624 }
625 tx_buffer_info->time_stamp = 0;
626 /* tx_buffer_info must be completely set up in the transmit path */
627 }
628
629 /**
630 * ixgbe_tx_xon_state - check the tx ring xon state
631 * @adapter: the ixgbe adapter
632 * @tx_ring: the corresponding tx_ring
633 *
634 * If not in DCB mode, checks TFCS.TXOFF, otherwise, find out the
635 * corresponding TC of this tx_ring when checking TFCS.
636 *
637 * Returns : true if in xon state (currently not paused)
638 */
639 static inline bool ixgbe_tx_xon_state(struct ixgbe_adapter *adapter,
640 struct ixgbe_ring *tx_ring)
641 {
642 u32 txoff = IXGBE_TFCS_TXOFF;
643
644 #ifdef CONFIG_IXGBE_DCB
645 if (adapter->dcb_cfg.pfc_mode_enable) {
646 int tc;
647 int reg_idx = tx_ring->reg_idx;
648 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
649
650 switch (adapter->hw.mac.type) {
651 case ixgbe_mac_82598EB:
652 tc = reg_idx >> 2;
653 txoff = IXGBE_TFCS_TXOFF0;
654 break;
655 case ixgbe_mac_82599EB:
656 tc = 0;
657 txoff = IXGBE_TFCS_TXOFF;
658 if (dcb_i == 8) {
659 /* TC0, TC1 */
660 tc = reg_idx >> 5;
661 if (tc == 2) /* TC2, TC3 */
662 tc += (reg_idx - 64) >> 4;
663 else if (tc == 3) /* TC4, TC5, TC6, TC7 */
664 tc += 1 + ((reg_idx - 96) >> 3);
665 } else if (dcb_i == 4) {
666 /* TC0, TC1 */
667 tc = reg_idx >> 6;
668 if (tc == 1) {
669 tc += (reg_idx - 64) >> 5;
670 if (tc == 2) /* TC2, TC3 */
671 tc += (reg_idx - 96) >> 4;
672 }
673 }
674 break;
675 default:
676 tc = 0;
677 }
678 txoff <<= tc;
679 }
680 #endif
681 return IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & txoff;
682 }
683
684 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
685 struct ixgbe_ring *tx_ring,
686 unsigned int eop)
687 {
688 struct ixgbe_hw *hw = &adapter->hw;
689
690 /* Detect a transmit hang in hardware, this serializes the
691 * check with the clearing of time_stamp and movement of eop */
692 adapter->detect_tx_hung = false;
693 if (tx_ring->tx_buffer_info[eop].time_stamp &&
694 time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
695 ixgbe_tx_xon_state(adapter, tx_ring)) {
696 /* detected Tx unit hang */
697 union ixgbe_adv_tx_desc *tx_desc;
698 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
699 e_err("Detected Tx Unit Hang\n"
700 " Tx Queue <%d>\n"
701 " TDH, TDT <%x>, <%x>\n"
702 " next_to_use <%x>\n"
703 " next_to_clean <%x>\n"
704 "tx_buffer_info[next_to_clean]\n"
705 " time_stamp <%lx>\n"
706 " jiffies <%lx>\n",
707 tx_ring->queue_index,
708 IXGBE_READ_REG(hw, tx_ring->head),
709 IXGBE_READ_REG(hw, tx_ring->tail),
710 tx_ring->next_to_use, eop,
711 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
712 return true;
713 }
714
715 return false;
716 }
717
718 #define IXGBE_MAX_TXD_PWR 14
719 #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
720
721 /* Tx Descriptors needed, worst case */
722 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
723 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
724 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
725 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
726
727 static void ixgbe_tx_timeout(struct net_device *netdev);
728
729 /**
730 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
731 * @q_vector: structure containing interrupt and ring information
732 * @tx_ring: tx ring to clean
733 **/
734 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
735 struct ixgbe_ring *tx_ring)
736 {
737 struct ixgbe_adapter *adapter = q_vector->adapter;
738 struct net_device *netdev = adapter->netdev;
739 union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
740 struct ixgbe_tx_buffer *tx_buffer_info;
741 unsigned int i, eop, count = 0;
742 unsigned int total_bytes = 0, total_packets = 0;
743
744 i = tx_ring->next_to_clean;
745 eop = tx_ring->tx_buffer_info[i].next_to_watch;
746 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
747
748 while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
749 (count < tx_ring->work_limit)) {
750 bool cleaned = false;
751 for ( ; !cleaned; count++) {
752 struct sk_buff *skb;
753 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
754 tx_buffer_info = &tx_ring->tx_buffer_info[i];
755 cleaned = (i == eop);
756 skb = tx_buffer_info->skb;
757
758 if (cleaned && skb) {
759 unsigned int segs, bytecount;
760 unsigned int hlen = skb_headlen(skb);
761
762 /* gso_segs is currently only valid for tcp */
763 segs = skb_shinfo(skb)->gso_segs ?: 1;
764 #ifdef IXGBE_FCOE
765 /* adjust for FCoE Sequence Offload */
766 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
767 && (skb->protocol == htons(ETH_P_FCOE)) &&
768 skb_is_gso(skb)) {
769 hlen = skb_transport_offset(skb) +
770 sizeof(struct fc_frame_header) +
771 sizeof(struct fcoe_crc_eof);
772 segs = DIV_ROUND_UP(skb->len - hlen,
773 skb_shinfo(skb)->gso_size);
774 }
775 #endif /* IXGBE_FCOE */
776 /* multiply data chunks by size of headers */
777 bytecount = ((segs - 1) * hlen) + skb->len;
778 total_packets += segs;
779 total_bytes += bytecount;
780 }
781
782 ixgbe_unmap_and_free_tx_resource(adapter,
783 tx_buffer_info);
784
785 tx_desc->wb.status = 0;
786
787 i++;
788 if (i == tx_ring->count)
789 i = 0;
790 }
791
792 eop = tx_ring->tx_buffer_info[i].next_to_watch;
793 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
794 }
795
796 tx_ring->next_to_clean = i;
797
798 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
799 if (unlikely(count && netif_carrier_ok(netdev) &&
800 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
801 /* Make sure that anybody stopping the queue after this
802 * sees the new next_to_clean.
803 */
804 smp_mb();
805 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
806 !test_bit(__IXGBE_DOWN, &adapter->state)) {
807 netif_wake_subqueue(netdev, tx_ring->queue_index);
808 ++tx_ring->restart_queue;
809 }
810 }
811
812 if (adapter->detect_tx_hung) {
813 if (ixgbe_check_tx_hang(adapter, tx_ring, i)) {
814 /* schedule immediate reset if we believe we hung */
815 e_info("tx hang %d detected, resetting adapter\n",
816 adapter->tx_timeout_count + 1);
817 ixgbe_tx_timeout(adapter->netdev);
818 }
819 }
820
821 /* re-arm the interrupt */
822 if (count >= tx_ring->work_limit)
823 ixgbe_irq_rearm_queues(adapter, ((u64)1 << q_vector->v_idx));
824
825 tx_ring->total_bytes += total_bytes;
826 tx_ring->total_packets += total_packets;
827 tx_ring->stats.packets += total_packets;
828 tx_ring->stats.bytes += total_bytes;
829 return (count < tx_ring->work_limit);
830 }
831
832 #ifdef CONFIG_IXGBE_DCA
833 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
834 struct ixgbe_ring *rx_ring)
835 {
836 u32 rxctrl;
837 int cpu = get_cpu();
838 int q = rx_ring->reg_idx;
839
840 if (rx_ring->cpu != cpu) {
841 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
842 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
843 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
844 rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
845 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
846 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
847 rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
848 IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
849 }
850 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
851 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
852 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
853 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_WRO_EN |
854 IXGBE_DCA_RXCTRL_DESC_HSRO_EN);
855 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
856 rx_ring->cpu = cpu;
857 }
858 put_cpu();
859 }
860
861 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
862 struct ixgbe_ring *tx_ring)
863 {
864 u32 txctrl;
865 int cpu = get_cpu();
866 int q = tx_ring->reg_idx;
867 struct ixgbe_hw *hw = &adapter->hw;
868
869 if (tx_ring->cpu != cpu) {
870 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
871 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(q));
872 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
873 txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
874 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
875 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(q), txctrl);
876 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
877 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(q));
878 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
879 txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
880 IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
881 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
882 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(q), txctrl);
883 }
884 tx_ring->cpu = cpu;
885 }
886 put_cpu();
887 }
888
889 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
890 {
891 int i;
892
893 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
894 return;
895
896 /* always use CB2 mode, difference is masked in the CB driver */
897 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
898
899 for (i = 0; i < adapter->num_tx_queues; i++) {
900 adapter->tx_ring[i]->cpu = -1;
901 ixgbe_update_tx_dca(adapter, adapter->tx_ring[i]);
902 }
903 for (i = 0; i < adapter->num_rx_queues; i++) {
904 adapter->rx_ring[i]->cpu = -1;
905 ixgbe_update_rx_dca(adapter, adapter->rx_ring[i]);
906 }
907 }
908
909 static int __ixgbe_notify_dca(struct device *dev, void *data)
910 {
911 struct net_device *netdev = dev_get_drvdata(dev);
912 struct ixgbe_adapter *adapter = netdev_priv(netdev);
913 unsigned long event = *(unsigned long *)data;
914
915 switch (event) {
916 case DCA_PROVIDER_ADD:
917 /* if we're already enabled, don't do it again */
918 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
919 break;
920 if (dca_add_requester(dev) == 0) {
921 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
922 ixgbe_setup_dca(adapter);
923 break;
924 }
925 /* Fall Through since DCA is disabled. */
926 case DCA_PROVIDER_REMOVE:
927 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
928 dca_remove_requester(dev);
929 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
930 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
931 }
932 break;
933 }
934
935 return 0;
936 }
937
938 #endif /* CONFIG_IXGBE_DCA */
939 /**
940 * ixgbe_receive_skb - Send a completed packet up the stack
941 * @adapter: board private structure
942 * @skb: packet to send up
943 * @status: hardware indication of status of receive
944 * @rx_ring: rx descriptor ring (for a specific queue) to setup
945 * @rx_desc: rx descriptor
946 **/
947 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
948 struct sk_buff *skb, u8 status,
949 struct ixgbe_ring *ring,
950 union ixgbe_adv_rx_desc *rx_desc)
951 {
952 struct ixgbe_adapter *adapter = q_vector->adapter;
953 struct napi_struct *napi = &q_vector->napi;
954 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
955 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
956
957 skb_record_rx_queue(skb, ring->queue_index);
958 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
959 if (adapter->vlgrp && is_vlan && (tag & VLAN_VID_MASK))
960 vlan_gro_receive(napi, adapter->vlgrp, tag, skb);
961 else
962 napi_gro_receive(napi, skb);
963 } else {
964 if (adapter->vlgrp && is_vlan && (tag & VLAN_VID_MASK))
965 vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
966 else
967 netif_rx(skb);
968 }
969 }
970
971 /**
972 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
973 * @adapter: address of board private structure
974 * @status_err: hardware indication of status of receive
975 * @skb: skb currently being received and modified
976 **/
977 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
978 union ixgbe_adv_rx_desc *rx_desc,
979 struct sk_buff *skb)
980 {
981 u32 status_err = le32_to_cpu(rx_desc->wb.upper.status_error);
982
983 skb->ip_summed = CHECKSUM_NONE;
984
985 /* Rx csum disabled */
986 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
987 return;
988
989 /* if IP and error */
990 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
991 (status_err & IXGBE_RXDADV_ERR_IPE)) {
992 adapter->hw_csum_rx_error++;
993 return;
994 }
995
996 if (!(status_err & IXGBE_RXD_STAT_L4CS))
997 return;
998
999 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
1000 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1001
1002 /*
1003 * 82599 errata, UDP frames with a 0 checksum can be marked as
1004 * checksum errors.
1005 */
1006 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
1007 (adapter->hw.mac.type == ixgbe_mac_82599EB))
1008 return;
1009
1010 adapter->hw_csum_rx_error++;
1011 return;
1012 }
1013
1014 /* It must be a TCP or UDP packet with a valid checksum */
1015 skb->ip_summed = CHECKSUM_UNNECESSARY;
1016 }
1017
1018 static inline void ixgbe_release_rx_desc(struct ixgbe_hw *hw,
1019 struct ixgbe_ring *rx_ring, u32 val)
1020 {
1021 /*
1022 * Force memory writes to complete before letting h/w
1023 * know there are new descriptors to fetch. (Only
1024 * applicable for weak-ordered memory model archs,
1025 * such as IA-64).
1026 */
1027 wmb();
1028 IXGBE_WRITE_REG(hw, IXGBE_RDT(rx_ring->reg_idx), val);
1029 }
1030
1031 /**
1032 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
1033 * @adapter: address of board private structure
1034 **/
1035 static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
1036 struct ixgbe_ring *rx_ring,
1037 int cleaned_count)
1038 {
1039 struct pci_dev *pdev = adapter->pdev;
1040 union ixgbe_adv_rx_desc *rx_desc;
1041 struct ixgbe_rx_buffer *bi;
1042 unsigned int i;
1043
1044 i = rx_ring->next_to_use;
1045 bi = &rx_ring->rx_buffer_info[i];
1046
1047 while (cleaned_count--) {
1048 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
1049
1050 if (!bi->page_dma &&
1051 (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)) {
1052 if (!bi->page) {
1053 bi->page = alloc_page(GFP_ATOMIC);
1054 if (!bi->page) {
1055 adapter->alloc_rx_page_failed++;
1056 goto no_buffers;
1057 }
1058 bi->page_offset = 0;
1059 } else {
1060 /* use a half page if we're re-using */
1061 bi->page_offset ^= (PAGE_SIZE / 2);
1062 }
1063
1064 bi->page_dma = dma_map_page(&pdev->dev, bi->page,
1065 bi->page_offset,
1066 (PAGE_SIZE / 2),
1067 DMA_FROM_DEVICE);
1068 }
1069
1070 if (!bi->skb) {
1071 struct sk_buff *skb;
1072 /* netdev_alloc_skb reserves 32 bytes up front!! */
1073 uint bufsz = rx_ring->rx_buf_len + SMP_CACHE_BYTES;
1074 skb = netdev_alloc_skb(adapter->netdev, bufsz);
1075
1076 if (!skb) {
1077 adapter->alloc_rx_buff_failed++;
1078 goto no_buffers;
1079 }
1080
1081 /* advance the data pointer to the next cache line */
1082 skb_reserve(skb, (PTR_ALIGN(skb->data, SMP_CACHE_BYTES)
1083 - skb->data));
1084
1085 bi->skb = skb;
1086 bi->dma = dma_map_single(&pdev->dev, skb->data,
1087 rx_ring->rx_buf_len,
1088 DMA_FROM_DEVICE);
1089 }
1090 /* Refresh the desc even if buffer_addrs didn't change because
1091 * each write-back erases this info. */
1092 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1093 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
1094 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
1095 } else {
1096 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
1097 }
1098
1099 i++;
1100 if (i == rx_ring->count)
1101 i = 0;
1102 bi = &rx_ring->rx_buffer_info[i];
1103 }
1104
1105 no_buffers:
1106 if (rx_ring->next_to_use != i) {
1107 rx_ring->next_to_use = i;
1108 if (i-- == 0)
1109 i = (rx_ring->count - 1);
1110
1111 ixgbe_release_rx_desc(&adapter->hw, rx_ring, i);
1112 }
1113 }
1114
1115 static inline u16 ixgbe_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
1116 {
1117 return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
1118 }
1119
1120 static inline u16 ixgbe_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
1121 {
1122 return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1123 }
1124
1125 static inline u32 ixgbe_get_rsc_count(union ixgbe_adv_rx_desc *rx_desc)
1126 {
1127 return (le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
1128 IXGBE_RXDADV_RSCCNT_MASK) >>
1129 IXGBE_RXDADV_RSCCNT_SHIFT;
1130 }
1131
1132 /**
1133 * ixgbe_transform_rsc_queue - change rsc queue into a full packet
1134 * @skb: pointer to the last skb in the rsc queue
1135 * @count: pointer to number of packets coalesced in this context
1136 *
1137 * This function changes a queue full of hw rsc buffers into a completed
1138 * packet. It uses the ->prev pointers to find the first packet and then
1139 * turns it into the frag list owner.
1140 **/
1141 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb,
1142 u64 *count)
1143 {
1144 unsigned int frag_list_size = 0;
1145
1146 while (skb->prev) {
1147 struct sk_buff *prev = skb->prev;
1148 frag_list_size += skb->len;
1149 skb->prev = NULL;
1150 skb = prev;
1151 *count += 1;
1152 }
1153
1154 skb_shinfo(skb)->frag_list = skb->next;
1155 skb->next = NULL;
1156 skb->len += frag_list_size;
1157 skb->data_len += frag_list_size;
1158 skb->truesize += frag_list_size;
1159 return skb;
1160 }
1161
1162 struct ixgbe_rsc_cb {
1163 dma_addr_t dma;
1164 bool delay_unmap;
1165 };
1166
1167 #define IXGBE_RSC_CB(skb) ((struct ixgbe_rsc_cb *)(skb)->cb)
1168
1169 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
1170 struct ixgbe_ring *rx_ring,
1171 int *work_done, int work_to_do)
1172 {
1173 struct ixgbe_adapter *adapter = q_vector->adapter;
1174 struct net_device *netdev = adapter->netdev;
1175 struct pci_dev *pdev = adapter->pdev;
1176 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
1177 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
1178 struct sk_buff *skb;
1179 unsigned int i, rsc_count = 0;
1180 u32 len, staterr;
1181 u16 hdr_info;
1182 bool cleaned = false;
1183 int cleaned_count = 0;
1184 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1185 #ifdef IXGBE_FCOE
1186 int ddp_bytes = 0;
1187 #endif /* IXGBE_FCOE */
1188
1189 i = rx_ring->next_to_clean;
1190 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
1191 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1192 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1193
1194 while (staterr & IXGBE_RXD_STAT_DD) {
1195 u32 upper_len = 0;
1196 if (*work_done >= work_to_do)
1197 break;
1198 (*work_done)++;
1199
1200 rmb(); /* read descriptor and rx_buffer_info after status DD */
1201 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1202 hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
1203 len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
1204 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
1205 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
1206 if ((len > IXGBE_RX_HDR_SIZE) ||
1207 (upper_len && !(hdr_info & IXGBE_RXDADV_SPH)))
1208 len = IXGBE_RX_HDR_SIZE;
1209 } else {
1210 len = le16_to_cpu(rx_desc->wb.upper.length);
1211 }
1212
1213 cleaned = true;
1214 skb = rx_buffer_info->skb;
1215 prefetch(skb->data);
1216 rx_buffer_info->skb = NULL;
1217
1218 if (rx_buffer_info->dma) {
1219 if ((adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
1220 (!(staterr & IXGBE_RXD_STAT_EOP)) &&
1221 (!(skb->prev))) {
1222 /*
1223 * When HWRSC is enabled, delay unmapping
1224 * of the first packet. It carries the
1225 * header information, HW may still
1226 * access the header after the writeback.
1227 * Only unmap it when EOP is reached
1228 */
1229 IXGBE_RSC_CB(skb)->delay_unmap = true;
1230 IXGBE_RSC_CB(skb)->dma = rx_buffer_info->dma;
1231 } else {
1232 dma_unmap_single(&pdev->dev,
1233 rx_buffer_info->dma,
1234 rx_ring->rx_buf_len,
1235 DMA_FROM_DEVICE);
1236 }
1237 rx_buffer_info->dma = 0;
1238 skb_put(skb, len);
1239 }
1240
1241 if (upper_len) {
1242 dma_unmap_page(&pdev->dev, rx_buffer_info->page_dma,
1243 PAGE_SIZE / 2, DMA_FROM_DEVICE);
1244 rx_buffer_info->page_dma = 0;
1245 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
1246 rx_buffer_info->page,
1247 rx_buffer_info->page_offset,
1248 upper_len);
1249
1250 if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
1251 (page_count(rx_buffer_info->page) != 1))
1252 rx_buffer_info->page = NULL;
1253 else
1254 get_page(rx_buffer_info->page);
1255
1256 skb->len += upper_len;
1257 skb->data_len += upper_len;
1258 skb->truesize += upper_len;
1259 }
1260
1261 i++;
1262 if (i == rx_ring->count)
1263 i = 0;
1264
1265 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
1266 prefetch(next_rxd);
1267 cleaned_count++;
1268
1269 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
1270 rsc_count = ixgbe_get_rsc_count(rx_desc);
1271
1272 if (rsc_count) {
1273 u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
1274 IXGBE_RXDADV_NEXTP_SHIFT;
1275 next_buffer = &rx_ring->rx_buffer_info[nextp];
1276 } else {
1277 next_buffer = &rx_ring->rx_buffer_info[i];
1278 }
1279
1280 if (staterr & IXGBE_RXD_STAT_EOP) {
1281 if (skb->prev)
1282 skb = ixgbe_transform_rsc_queue(skb, &(rx_ring->rsc_count));
1283 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
1284 if (IXGBE_RSC_CB(skb)->delay_unmap) {
1285 dma_unmap_single(&pdev->dev,
1286 IXGBE_RSC_CB(skb)->dma,
1287 rx_ring->rx_buf_len,
1288 DMA_FROM_DEVICE);
1289 IXGBE_RSC_CB(skb)->dma = 0;
1290 IXGBE_RSC_CB(skb)->delay_unmap = false;
1291 }
1292 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)
1293 rx_ring->rsc_count += skb_shinfo(skb)->nr_frags;
1294 else
1295 rx_ring->rsc_count++;
1296 rx_ring->rsc_flush++;
1297 }
1298 rx_ring->stats.packets++;
1299 rx_ring->stats.bytes += skb->len;
1300 } else {
1301 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1302 rx_buffer_info->skb = next_buffer->skb;
1303 rx_buffer_info->dma = next_buffer->dma;
1304 next_buffer->skb = skb;
1305 next_buffer->dma = 0;
1306 } else {
1307 skb->next = next_buffer->skb;
1308 skb->next->prev = skb;
1309 }
1310 rx_ring->non_eop_descs++;
1311 goto next_desc;
1312 }
1313
1314 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
1315 dev_kfree_skb_irq(skb);
1316 goto next_desc;
1317 }
1318
1319 ixgbe_rx_checksum(adapter, rx_desc, skb);
1320
1321 /* probably a little skewed due to removing CRC */
1322 total_rx_bytes += skb->len;
1323 total_rx_packets++;
1324
1325 skb->protocol = eth_type_trans(skb, adapter->netdev);
1326 #ifdef IXGBE_FCOE
1327 /* if ddp, not passing to ULD unless for FCP_RSP or error */
1328 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
1329 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
1330 if (!ddp_bytes)
1331 goto next_desc;
1332 }
1333 #endif /* IXGBE_FCOE */
1334 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
1335
1336 next_desc:
1337 rx_desc->wb.upper.status_error = 0;
1338
1339 /* return some buffers to hardware, one at a time is too slow */
1340 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
1341 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
1342 cleaned_count = 0;
1343 }
1344
1345 /* use prefetched values */
1346 rx_desc = next_rxd;
1347 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1348
1349 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1350 }
1351
1352 rx_ring->next_to_clean = i;
1353 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
1354
1355 if (cleaned_count)
1356 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
1357
1358 #ifdef IXGBE_FCOE
1359 /* include DDPed FCoE data */
1360 if (ddp_bytes > 0) {
1361 unsigned int mss;
1362
1363 mss = adapter->netdev->mtu - sizeof(struct fcoe_hdr) -
1364 sizeof(struct fc_frame_header) -
1365 sizeof(struct fcoe_crc_eof);
1366 if (mss > 512)
1367 mss &= ~511;
1368 total_rx_bytes += ddp_bytes;
1369 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
1370 }
1371 #endif /* IXGBE_FCOE */
1372
1373 rx_ring->total_packets += total_rx_packets;
1374 rx_ring->total_bytes += total_rx_bytes;
1375 netdev->stats.rx_bytes += total_rx_bytes;
1376 netdev->stats.rx_packets += total_rx_packets;
1377
1378 return cleaned;
1379 }
1380
1381 static int ixgbe_clean_rxonly(struct napi_struct *, int);
1382 /**
1383 * ixgbe_configure_msix - Configure MSI-X hardware
1384 * @adapter: board private structure
1385 *
1386 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
1387 * interrupts.
1388 **/
1389 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
1390 {
1391 struct ixgbe_q_vector *q_vector;
1392 int i, j, q_vectors, v_idx, r_idx;
1393 u32 mask;
1394
1395 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1396
1397 /*
1398 * Populate the IVAR table and set the ITR values to the
1399 * corresponding register.
1400 */
1401 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1402 q_vector = adapter->q_vector[v_idx];
1403 /* XXX for_each_set_bit(...) */
1404 r_idx = find_first_bit(q_vector->rxr_idx,
1405 adapter->num_rx_queues);
1406
1407 for (i = 0; i < q_vector->rxr_count; i++) {
1408 j = adapter->rx_ring[r_idx]->reg_idx;
1409 ixgbe_set_ivar(adapter, 0, j, v_idx);
1410 r_idx = find_next_bit(q_vector->rxr_idx,
1411 adapter->num_rx_queues,
1412 r_idx + 1);
1413 }
1414 r_idx = find_first_bit(q_vector->txr_idx,
1415 adapter->num_tx_queues);
1416
1417 for (i = 0; i < q_vector->txr_count; i++) {
1418 j = adapter->tx_ring[r_idx]->reg_idx;
1419 ixgbe_set_ivar(adapter, 1, j, v_idx);
1420 r_idx = find_next_bit(q_vector->txr_idx,
1421 adapter->num_tx_queues,
1422 r_idx + 1);
1423 }
1424
1425 if (q_vector->txr_count && !q_vector->rxr_count)
1426 /* tx only */
1427 q_vector->eitr = adapter->tx_eitr_param;
1428 else if (q_vector->rxr_count)
1429 /* rx or mixed */
1430 q_vector->eitr = adapter->rx_eitr_param;
1431
1432 ixgbe_write_eitr(q_vector);
1433 }
1434
1435 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
1436 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
1437 v_idx);
1438 else if (adapter->hw.mac.type == ixgbe_mac_82599EB)
1439 ixgbe_set_ivar(adapter, -1, 1, v_idx);
1440 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
1441
1442 /* set up to autoclear timer, and the vectors */
1443 mask = IXGBE_EIMS_ENABLE_MASK;
1444 if (adapter->num_vfs)
1445 mask &= ~(IXGBE_EIMS_OTHER |
1446 IXGBE_EIMS_MAILBOX |
1447 IXGBE_EIMS_LSC);
1448 else
1449 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
1450 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
1451 }
1452
1453 enum latency_range {
1454 lowest_latency = 0,
1455 low_latency = 1,
1456 bulk_latency = 2,
1457 latency_invalid = 255
1458 };
1459
1460 /**
1461 * ixgbe_update_itr - update the dynamic ITR value based on statistics
1462 * @adapter: pointer to adapter
1463 * @eitr: eitr setting (ints per sec) to give last timeslice
1464 * @itr_setting: current throttle rate in ints/second
1465 * @packets: the number of packets during this measurement interval
1466 * @bytes: the number of bytes during this measurement interval
1467 *
1468 * Stores a new ITR value based on packets and byte
1469 * counts during the last interrupt. The advantage of per interrupt
1470 * computation is faster updates and more accurate ITR for the current
1471 * traffic pattern. Constants in this function were computed
1472 * based on theoretical maximum wire speed and thresholds were set based
1473 * on testing data as well as attempting to minimize response time
1474 * while increasing bulk throughput.
1475 * this functionality is controlled by the InterruptThrottleRate module
1476 * parameter (see ixgbe_param.c)
1477 **/
1478 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
1479 u32 eitr, u8 itr_setting,
1480 int packets, int bytes)
1481 {
1482 unsigned int retval = itr_setting;
1483 u32 timepassed_us;
1484 u64 bytes_perint;
1485
1486 if (packets == 0)
1487 goto update_itr_done;
1488
1489
1490 /* simple throttlerate management
1491 * 0-20MB/s lowest (100000 ints/s)
1492 * 20-100MB/s low (20000 ints/s)
1493 * 100-1249MB/s bulk (8000 ints/s)
1494 */
1495 /* what was last interrupt timeslice? */
1496 timepassed_us = 1000000/eitr;
1497 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1498
1499 switch (itr_setting) {
1500 case lowest_latency:
1501 if (bytes_perint > adapter->eitr_low)
1502 retval = low_latency;
1503 break;
1504 case low_latency:
1505 if (bytes_perint > adapter->eitr_high)
1506 retval = bulk_latency;
1507 else if (bytes_perint <= adapter->eitr_low)
1508 retval = lowest_latency;
1509 break;
1510 case bulk_latency:
1511 if (bytes_perint <= adapter->eitr_high)
1512 retval = low_latency;
1513 break;
1514 }
1515
1516 update_itr_done:
1517 return retval;
1518 }
1519
1520 /**
1521 * ixgbe_write_eitr - write EITR register in hardware specific way
1522 * @q_vector: structure containing interrupt and ring information
1523 *
1524 * This function is made to be called by ethtool and by the driver
1525 * when it needs to update EITR registers at runtime. Hardware
1526 * specific quirks/differences are taken care of here.
1527 */
1528 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1529 {
1530 struct ixgbe_adapter *adapter = q_vector->adapter;
1531 struct ixgbe_hw *hw = &adapter->hw;
1532 int v_idx = q_vector->v_idx;
1533 u32 itr_reg = EITR_INTS_PER_SEC_TO_REG(q_vector->eitr);
1534
1535 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1536 /* must write high and low 16 bits to reset counter */
1537 itr_reg |= (itr_reg << 16);
1538 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1539 /*
1540 * 82599 can support a value of zero, so allow it for
1541 * max interrupt rate, but there is an errata where it can
1542 * not be zero with RSC
1543 */
1544 if (itr_reg == 8 &&
1545 !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
1546 itr_reg = 0;
1547
1548 /*
1549 * set the WDIS bit to not clear the timer bits and cause an
1550 * immediate assertion of the interrupt
1551 */
1552 itr_reg |= IXGBE_EITR_CNT_WDIS;
1553 }
1554 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1555 }
1556
1557 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
1558 {
1559 struct ixgbe_adapter *adapter = q_vector->adapter;
1560 u32 new_itr;
1561 u8 current_itr, ret_itr;
1562 int i, r_idx;
1563 struct ixgbe_ring *rx_ring, *tx_ring;
1564
1565 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1566 for (i = 0; i < q_vector->txr_count; i++) {
1567 tx_ring = adapter->tx_ring[r_idx];
1568 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1569 q_vector->tx_itr,
1570 tx_ring->total_packets,
1571 tx_ring->total_bytes);
1572 /* if the result for this queue would decrease interrupt
1573 * rate for this vector then use that result */
1574 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
1575 q_vector->tx_itr - 1 : ret_itr);
1576 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1577 r_idx + 1);
1578 }
1579
1580 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1581 for (i = 0; i < q_vector->rxr_count; i++) {
1582 rx_ring = adapter->rx_ring[r_idx];
1583 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1584 q_vector->rx_itr,
1585 rx_ring->total_packets,
1586 rx_ring->total_bytes);
1587 /* if the result for this queue would decrease interrupt
1588 * rate for this vector then use that result */
1589 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
1590 q_vector->rx_itr - 1 : ret_itr);
1591 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1592 r_idx + 1);
1593 }
1594
1595 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1596
1597 switch (current_itr) {
1598 /* counts and packets in update_itr are dependent on these numbers */
1599 case lowest_latency:
1600 new_itr = 100000;
1601 break;
1602 case low_latency:
1603 new_itr = 20000; /* aka hwitr = ~200 */
1604 break;
1605 case bulk_latency:
1606 default:
1607 new_itr = 8000;
1608 break;
1609 }
1610
1611 if (new_itr != q_vector->eitr) {
1612 /* do an exponential smoothing */
1613 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1614
1615 /* save the algorithm value here, not the smoothed one */
1616 q_vector->eitr = new_itr;
1617
1618 ixgbe_write_eitr(q_vector);
1619 }
1620 }
1621
1622 /**
1623 * ixgbe_check_overtemp_task - worker thread to check over tempurature
1624 * @work: pointer to work_struct containing our data
1625 **/
1626 static void ixgbe_check_overtemp_task(struct work_struct *work)
1627 {
1628 struct ixgbe_adapter *adapter = container_of(work,
1629 struct ixgbe_adapter,
1630 check_overtemp_task);
1631 struct ixgbe_hw *hw = &adapter->hw;
1632 u32 eicr = adapter->interrupt_event;
1633
1634 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
1635 switch (hw->device_id) {
1636 case IXGBE_DEV_ID_82599_T3_LOM: {
1637 u32 autoneg;
1638 bool link_up = false;
1639
1640 if (hw->mac.ops.check_link)
1641 hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
1642
1643 if (((eicr & IXGBE_EICR_GPI_SDP0) && (!link_up)) ||
1644 (eicr & IXGBE_EICR_LSC))
1645 /* Check if this is due to overtemp */
1646 if (hw->phy.ops.check_overtemp(hw) == IXGBE_ERR_OVERTEMP)
1647 break;
1648 }
1649 return;
1650 default:
1651 if (!(eicr & IXGBE_EICR_GPI_SDP0))
1652 return;
1653 break;
1654 }
1655 e_crit("Network adapter has been stopped because it "
1656 "has over heated. Restart the computer. If the problem "
1657 "persists, power off the system and replace the "
1658 "adapter\n");
1659 /* write to clear the interrupt */
1660 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP0);
1661 }
1662 }
1663
1664 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1665 {
1666 struct ixgbe_hw *hw = &adapter->hw;
1667
1668 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1669 (eicr & IXGBE_EICR_GPI_SDP1)) {
1670 e_crit("Fan has stopped, replace the adapter\n");
1671 /* write to clear the interrupt */
1672 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1673 }
1674 }
1675
1676 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1677 {
1678 struct ixgbe_hw *hw = &adapter->hw;
1679
1680 if (eicr & IXGBE_EICR_GPI_SDP1) {
1681 /* Clear the interrupt */
1682 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1683 schedule_work(&adapter->multispeed_fiber_task);
1684 } else if (eicr & IXGBE_EICR_GPI_SDP2) {
1685 /* Clear the interrupt */
1686 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1687 schedule_work(&adapter->sfp_config_module_task);
1688 } else {
1689 /* Interrupt isn't for us... */
1690 return;
1691 }
1692 }
1693
1694 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1695 {
1696 struct ixgbe_hw *hw = &adapter->hw;
1697
1698 adapter->lsc_int++;
1699 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1700 adapter->link_check_timeout = jiffies;
1701 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1702 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1703 IXGBE_WRITE_FLUSH(hw);
1704 schedule_work(&adapter->watchdog_task);
1705 }
1706 }
1707
1708 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1709 {
1710 struct net_device *netdev = data;
1711 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1712 struct ixgbe_hw *hw = &adapter->hw;
1713 u32 eicr;
1714
1715 /*
1716 * Workaround for Silicon errata. Use clear-by-write instead
1717 * of clear-by-read. Reading with EICS will return the
1718 * interrupt causes without clearing, which later be done
1719 * with the write to EICR.
1720 */
1721 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1722 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1723
1724 if (eicr & IXGBE_EICR_LSC)
1725 ixgbe_check_lsc(adapter);
1726
1727 if (eicr & IXGBE_EICR_MAILBOX)
1728 ixgbe_msg_task(adapter);
1729
1730 if (hw->mac.type == ixgbe_mac_82598EB)
1731 ixgbe_check_fan_failure(adapter, eicr);
1732
1733 if (hw->mac.type == ixgbe_mac_82599EB) {
1734 ixgbe_check_sfp_event(adapter, eicr);
1735 adapter->interrupt_event = eicr;
1736 if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
1737 ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)))
1738 schedule_work(&adapter->check_overtemp_task);
1739
1740 /* Handle Flow Director Full threshold interrupt */
1741 if (eicr & IXGBE_EICR_FLOW_DIR) {
1742 int i;
1743 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_FLOW_DIR);
1744 /* Disable transmits before FDIR Re-initialization */
1745 netif_tx_stop_all_queues(netdev);
1746 for (i = 0; i < adapter->num_tx_queues; i++) {
1747 struct ixgbe_ring *tx_ring =
1748 adapter->tx_ring[i];
1749 if (test_and_clear_bit(__IXGBE_FDIR_INIT_DONE,
1750 &tx_ring->reinit_state))
1751 schedule_work(&adapter->fdir_reinit_task);
1752 }
1753 }
1754 }
1755 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1756 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
1757
1758 return IRQ_HANDLED;
1759 }
1760
1761 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1762 u64 qmask)
1763 {
1764 u32 mask;
1765
1766 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1767 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1768 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1769 } else {
1770 mask = (qmask & 0xFFFFFFFF);
1771 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(0), mask);
1772 mask = (qmask >> 32);
1773 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(1), mask);
1774 }
1775 /* skip the flush */
1776 }
1777
1778 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1779 u64 qmask)
1780 {
1781 u32 mask;
1782
1783 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1784 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1785 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, mask);
1786 } else {
1787 mask = (qmask & 0xFFFFFFFF);
1788 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), mask);
1789 mask = (qmask >> 32);
1790 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), mask);
1791 }
1792 /* skip the flush */
1793 }
1794
1795 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
1796 {
1797 struct ixgbe_q_vector *q_vector = data;
1798 struct ixgbe_adapter *adapter = q_vector->adapter;
1799 struct ixgbe_ring *tx_ring;
1800 int i, r_idx;
1801
1802 if (!q_vector->txr_count)
1803 return IRQ_HANDLED;
1804
1805 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1806 for (i = 0; i < q_vector->txr_count; i++) {
1807 tx_ring = adapter->tx_ring[r_idx];
1808 tx_ring->total_bytes = 0;
1809 tx_ring->total_packets = 0;
1810 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1811 r_idx + 1);
1812 }
1813
1814 /* EIAM disabled interrupts (on this vector) for us */
1815 napi_schedule(&q_vector->napi);
1816
1817 return IRQ_HANDLED;
1818 }
1819
1820 /**
1821 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
1822 * @irq: unused
1823 * @data: pointer to our q_vector struct for this interrupt vector
1824 **/
1825 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
1826 {
1827 struct ixgbe_q_vector *q_vector = data;
1828 struct ixgbe_adapter *adapter = q_vector->adapter;
1829 struct ixgbe_ring *rx_ring;
1830 int r_idx;
1831 int i;
1832
1833 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1834 for (i = 0; i < q_vector->rxr_count; i++) {
1835 rx_ring = adapter->rx_ring[r_idx];
1836 rx_ring->total_bytes = 0;
1837 rx_ring->total_packets = 0;
1838 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1839 r_idx + 1);
1840 }
1841
1842 if (!q_vector->rxr_count)
1843 return IRQ_HANDLED;
1844
1845 /* disable interrupts on this vector only */
1846 /* EIAM disabled interrupts (on this vector) for us */
1847 napi_schedule(&q_vector->napi);
1848
1849 return IRQ_HANDLED;
1850 }
1851
1852 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1853 {
1854 struct ixgbe_q_vector *q_vector = data;
1855 struct ixgbe_adapter *adapter = q_vector->adapter;
1856 struct ixgbe_ring *ring;
1857 int r_idx;
1858 int i;
1859
1860 if (!q_vector->txr_count && !q_vector->rxr_count)
1861 return IRQ_HANDLED;
1862
1863 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1864 for (i = 0; i < q_vector->txr_count; i++) {
1865 ring = adapter->tx_ring[r_idx];
1866 ring->total_bytes = 0;
1867 ring->total_packets = 0;
1868 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1869 r_idx + 1);
1870 }
1871
1872 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1873 for (i = 0; i < q_vector->rxr_count; i++) {
1874 ring = adapter->rx_ring[r_idx];
1875 ring->total_bytes = 0;
1876 ring->total_packets = 0;
1877 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1878 r_idx + 1);
1879 }
1880
1881 /* EIAM disabled interrupts (on this vector) for us */
1882 napi_schedule(&q_vector->napi);
1883
1884 return IRQ_HANDLED;
1885 }
1886
1887 /**
1888 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1889 * @napi: napi struct with our devices info in it
1890 * @budget: amount of work driver is allowed to do this pass, in packets
1891 *
1892 * This function is optimized for cleaning one queue only on a single
1893 * q_vector!!!
1894 **/
1895 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1896 {
1897 struct ixgbe_q_vector *q_vector =
1898 container_of(napi, struct ixgbe_q_vector, napi);
1899 struct ixgbe_adapter *adapter = q_vector->adapter;
1900 struct ixgbe_ring *rx_ring = NULL;
1901 int work_done = 0;
1902 long r_idx;
1903
1904 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1905 rx_ring = adapter->rx_ring[r_idx];
1906 #ifdef CONFIG_IXGBE_DCA
1907 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1908 ixgbe_update_rx_dca(adapter, rx_ring);
1909 #endif
1910
1911 ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
1912
1913 /* If all Rx work done, exit the polling mode */
1914 if (work_done < budget) {
1915 napi_complete(napi);
1916 if (adapter->rx_itr_setting & 1)
1917 ixgbe_set_itr_msix(q_vector);
1918 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1919 ixgbe_irq_enable_queues(adapter,
1920 ((u64)1 << q_vector->v_idx));
1921 }
1922
1923 return work_done;
1924 }
1925
1926 /**
1927 * ixgbe_clean_rxtx_many - msix (aka one shot) rx clean routine
1928 * @napi: napi struct with our devices info in it
1929 * @budget: amount of work driver is allowed to do this pass, in packets
1930 *
1931 * This function will clean more than one rx queue associated with a
1932 * q_vector.
1933 **/
1934 static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
1935 {
1936 struct ixgbe_q_vector *q_vector =
1937 container_of(napi, struct ixgbe_q_vector, napi);
1938 struct ixgbe_adapter *adapter = q_vector->adapter;
1939 struct ixgbe_ring *ring = NULL;
1940 int work_done = 0, i;
1941 long r_idx;
1942 bool tx_clean_complete = true;
1943
1944 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1945 for (i = 0; i < q_vector->txr_count; i++) {
1946 ring = adapter->tx_ring[r_idx];
1947 #ifdef CONFIG_IXGBE_DCA
1948 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1949 ixgbe_update_tx_dca(adapter, ring);
1950 #endif
1951 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
1952 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1953 r_idx + 1);
1954 }
1955
1956 /* attempt to distribute budget to each queue fairly, but don't allow
1957 * the budget to go below 1 because we'll exit polling */
1958 budget /= (q_vector->rxr_count ?: 1);
1959 budget = max(budget, 1);
1960 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1961 for (i = 0; i < q_vector->rxr_count; i++) {
1962 ring = adapter->rx_ring[r_idx];
1963 #ifdef CONFIG_IXGBE_DCA
1964 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1965 ixgbe_update_rx_dca(adapter, ring);
1966 #endif
1967 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
1968 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1969 r_idx + 1);
1970 }
1971
1972 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1973 ring = adapter->rx_ring[r_idx];
1974 /* If all Rx work done, exit the polling mode */
1975 if (work_done < budget) {
1976 napi_complete(napi);
1977 if (adapter->rx_itr_setting & 1)
1978 ixgbe_set_itr_msix(q_vector);
1979 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1980 ixgbe_irq_enable_queues(adapter,
1981 ((u64)1 << q_vector->v_idx));
1982 return 0;
1983 }
1984
1985 return work_done;
1986 }
1987
1988 /**
1989 * ixgbe_clean_txonly - msix (aka one shot) tx clean routine
1990 * @napi: napi struct with our devices info in it
1991 * @budget: amount of work driver is allowed to do this pass, in packets
1992 *
1993 * This function is optimized for cleaning one queue only on a single
1994 * q_vector!!!
1995 **/
1996 static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
1997 {
1998 struct ixgbe_q_vector *q_vector =
1999 container_of(napi, struct ixgbe_q_vector, napi);
2000 struct ixgbe_adapter *adapter = q_vector->adapter;
2001 struct ixgbe_ring *tx_ring = NULL;
2002 int work_done = 0;
2003 long r_idx;
2004
2005 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
2006 tx_ring = adapter->tx_ring[r_idx];
2007 #ifdef CONFIG_IXGBE_DCA
2008 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2009 ixgbe_update_tx_dca(adapter, tx_ring);
2010 #endif
2011
2012 if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
2013 work_done = budget;
2014
2015 /* If all Tx work done, exit the polling mode */
2016 if (work_done < budget) {
2017 napi_complete(napi);
2018 if (adapter->tx_itr_setting & 1)
2019 ixgbe_set_itr_msix(q_vector);
2020 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2021 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
2022 }
2023
2024 return work_done;
2025 }
2026
2027 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
2028 int r_idx)
2029 {
2030 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2031
2032 set_bit(r_idx, q_vector->rxr_idx);
2033 q_vector->rxr_count++;
2034 }
2035
2036 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
2037 int t_idx)
2038 {
2039 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2040
2041 set_bit(t_idx, q_vector->txr_idx);
2042 q_vector->txr_count++;
2043 }
2044
2045 /**
2046 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
2047 * @adapter: board private structure to initialize
2048 * @vectors: allotted vector count for descriptor rings
2049 *
2050 * This function maps descriptor rings to the queue-specific vectors
2051 * we were allotted through the MSI-X enabling code. Ideally, we'd have
2052 * one vector per ring/queue, but on a constrained vector budget, we
2053 * group the rings as "efficiently" as possible. You would add new
2054 * mapping configurations in here.
2055 **/
2056 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
2057 int vectors)
2058 {
2059 int v_start = 0;
2060 int rxr_idx = 0, txr_idx = 0;
2061 int rxr_remaining = adapter->num_rx_queues;
2062 int txr_remaining = adapter->num_tx_queues;
2063 int i, j;
2064 int rqpv, tqpv;
2065 int err = 0;
2066
2067 /* No mapping required if MSI-X is disabled. */
2068 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2069 goto out;
2070
2071 /*
2072 * The ideal configuration...
2073 * We have enough vectors to map one per queue.
2074 */
2075 if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
2076 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
2077 map_vector_to_rxq(adapter, v_start, rxr_idx);
2078
2079 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
2080 map_vector_to_txq(adapter, v_start, txr_idx);
2081
2082 goto out;
2083 }
2084
2085 /*
2086 * If we don't have enough vectors for a 1-to-1
2087 * mapping, we'll have to group them so there are
2088 * multiple queues per vector.
2089 */
2090 /* Re-adjusting *qpv takes care of the remainder. */
2091 for (i = v_start; i < vectors; i++) {
2092 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
2093 for (j = 0; j < rqpv; j++) {
2094 map_vector_to_rxq(adapter, i, rxr_idx);
2095 rxr_idx++;
2096 rxr_remaining--;
2097 }
2098 }
2099 for (i = v_start; i < vectors; i++) {
2100 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
2101 for (j = 0; j < tqpv; j++) {
2102 map_vector_to_txq(adapter, i, txr_idx);
2103 txr_idx++;
2104 txr_remaining--;
2105 }
2106 }
2107
2108 out:
2109 return err;
2110 }
2111
2112 /**
2113 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2114 * @adapter: board private structure
2115 *
2116 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2117 * interrupts from the kernel.
2118 **/
2119 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2120 {
2121 struct net_device *netdev = adapter->netdev;
2122 irqreturn_t (*handler)(int, void *);
2123 int i, vector, q_vectors, err;
2124 int ri=0, ti=0;
2125
2126 /* Decrement for Other and TCP Timer vectors */
2127 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2128
2129 /* Map the Tx/Rx rings to the vectors we were allotted. */
2130 err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
2131 if (err)
2132 goto out;
2133
2134 #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
2135 (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
2136 &ixgbe_msix_clean_many)
2137 for (vector = 0; vector < q_vectors; vector++) {
2138 handler = SET_HANDLER(adapter->q_vector[vector]);
2139
2140 if(handler == &ixgbe_msix_clean_rx) {
2141 sprintf(adapter->name[vector], "%s-%s-%d",
2142 netdev->name, "rx", ri++);
2143 }
2144 else if(handler == &ixgbe_msix_clean_tx) {
2145 sprintf(adapter->name[vector], "%s-%s-%d",
2146 netdev->name, "tx", ti++);
2147 }
2148 else
2149 sprintf(adapter->name[vector], "%s-%s-%d",
2150 netdev->name, "TxRx", vector);
2151
2152 err = request_irq(adapter->msix_entries[vector].vector,
2153 handler, 0, adapter->name[vector],
2154 adapter->q_vector[vector]);
2155 if (err) {
2156 e_err("request_irq failed for MSIX interrupt: "
2157 "Error: %d\n", err);
2158 goto free_queue_irqs;
2159 }
2160 }
2161
2162 sprintf(adapter->name[vector], "%s:lsc", netdev->name);
2163 err = request_irq(adapter->msix_entries[vector].vector,
2164 ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
2165 if (err) {
2166 e_err("request_irq for msix_lsc failed: %d\n", err);
2167 goto free_queue_irqs;
2168 }
2169
2170 return 0;
2171
2172 free_queue_irqs:
2173 for (i = vector - 1; i >= 0; i--)
2174 free_irq(adapter->msix_entries[--vector].vector,
2175 adapter->q_vector[i]);
2176 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2177 pci_disable_msix(adapter->pdev);
2178 kfree(adapter->msix_entries);
2179 adapter->msix_entries = NULL;
2180 out:
2181 return err;
2182 }
2183
2184 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
2185 {
2186 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2187 u8 current_itr;
2188 u32 new_itr = q_vector->eitr;
2189 struct ixgbe_ring *rx_ring = adapter->rx_ring[0];
2190 struct ixgbe_ring *tx_ring = adapter->tx_ring[0];
2191
2192 q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
2193 q_vector->tx_itr,
2194 tx_ring->total_packets,
2195 tx_ring->total_bytes);
2196 q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
2197 q_vector->rx_itr,
2198 rx_ring->total_packets,
2199 rx_ring->total_bytes);
2200
2201 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
2202
2203 switch (current_itr) {
2204 /* counts and packets in update_itr are dependent on these numbers */
2205 case lowest_latency:
2206 new_itr = 100000;
2207 break;
2208 case low_latency:
2209 new_itr = 20000; /* aka hwitr = ~200 */
2210 break;
2211 case bulk_latency:
2212 new_itr = 8000;
2213 break;
2214 default:
2215 break;
2216 }
2217
2218 if (new_itr != q_vector->eitr) {
2219 /* do an exponential smoothing */
2220 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
2221
2222 /* save the algorithm value here, not the smoothed one */
2223 q_vector->eitr = new_itr;
2224
2225 ixgbe_write_eitr(q_vector);
2226 }
2227 }
2228
2229 /**
2230 * ixgbe_irq_enable - Enable default interrupt generation settings
2231 * @adapter: board private structure
2232 **/
2233 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
2234 {
2235 u32 mask;
2236
2237 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
2238 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
2239 mask |= IXGBE_EIMS_GPI_SDP0;
2240 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
2241 mask |= IXGBE_EIMS_GPI_SDP1;
2242 if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
2243 mask |= IXGBE_EIMS_ECC;
2244 mask |= IXGBE_EIMS_GPI_SDP1;
2245 mask |= IXGBE_EIMS_GPI_SDP2;
2246 if (adapter->num_vfs)
2247 mask |= IXGBE_EIMS_MAILBOX;
2248 }
2249 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
2250 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
2251 mask |= IXGBE_EIMS_FLOW_DIR;
2252
2253 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
2254 ixgbe_irq_enable_queues(adapter, ~0);
2255 IXGBE_WRITE_FLUSH(&adapter->hw);
2256
2257 if (adapter->num_vfs > 32) {
2258 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
2259 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
2260 }
2261 }
2262
2263 /**
2264 * ixgbe_intr - legacy mode Interrupt Handler
2265 * @irq: interrupt number
2266 * @data: pointer to a network interface device structure
2267 **/
2268 static irqreturn_t ixgbe_intr(int irq, void *data)
2269 {
2270 struct net_device *netdev = data;
2271 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2272 struct ixgbe_hw *hw = &adapter->hw;
2273 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2274 u32 eicr;
2275
2276 /*
2277 * Workaround for silicon errata. Mask the interrupts
2278 * before the read of EICR.
2279 */
2280 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2281
2282 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2283 * therefore no explict interrupt disable is necessary */
2284 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2285 if (!eicr) {
2286 /* shared interrupt alert!
2287 * make sure interrupts are enabled because the read will
2288 * have disabled interrupts due to EIAM */
2289 ixgbe_irq_enable(adapter);
2290 return IRQ_NONE; /* Not our interrupt */
2291 }
2292
2293 if (eicr & IXGBE_EICR_LSC)
2294 ixgbe_check_lsc(adapter);
2295
2296 if (hw->mac.type == ixgbe_mac_82599EB)
2297 ixgbe_check_sfp_event(adapter, eicr);
2298
2299 ixgbe_check_fan_failure(adapter, eicr);
2300 if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
2301 ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)))
2302 schedule_work(&adapter->check_overtemp_task);
2303
2304 if (napi_schedule_prep(&(q_vector->napi))) {
2305 adapter->tx_ring[0]->total_packets = 0;
2306 adapter->tx_ring[0]->total_bytes = 0;
2307 adapter->rx_ring[0]->total_packets = 0;
2308 adapter->rx_ring[0]->total_bytes = 0;
2309 /* would disable interrupts here but EIAM disabled it */
2310 __napi_schedule(&(q_vector->napi));
2311 }
2312
2313 return IRQ_HANDLED;
2314 }
2315
2316 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
2317 {
2318 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2319
2320 for (i = 0; i < q_vectors; i++) {
2321 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
2322 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
2323 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
2324 q_vector->rxr_count = 0;
2325 q_vector->txr_count = 0;
2326 }
2327 }
2328
2329 /**
2330 * ixgbe_request_irq - initialize interrupts
2331 * @adapter: board private structure
2332 *
2333 * Attempts to configure interrupts using the best available
2334 * capabilities of the hardware and kernel.
2335 **/
2336 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
2337 {
2338 struct net_device *netdev = adapter->netdev;
2339 int err;
2340
2341 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2342 err = ixgbe_request_msix_irqs(adapter);
2343 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
2344 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
2345 netdev->name, netdev);
2346 } else {
2347 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
2348 netdev->name, netdev);
2349 }
2350
2351 if (err)
2352 e_err("request_irq failed, Error %d\n", err);
2353
2354 return err;
2355 }
2356
2357 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
2358 {
2359 struct net_device *netdev = adapter->netdev;
2360
2361 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2362 int i, q_vectors;
2363
2364 q_vectors = adapter->num_msix_vectors;
2365
2366 i = q_vectors - 1;
2367 free_irq(adapter->msix_entries[i].vector, netdev);
2368
2369 i--;
2370 for (; i >= 0; i--) {
2371 free_irq(adapter->msix_entries[i].vector,
2372 adapter->q_vector[i]);
2373 }
2374
2375 ixgbe_reset_q_vectors(adapter);
2376 } else {
2377 free_irq(adapter->pdev->irq, netdev);
2378 }
2379 }
2380
2381 /**
2382 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
2383 * @adapter: board private structure
2384 **/
2385 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
2386 {
2387 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2388 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
2389 } else {
2390 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
2391 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
2392 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
2393 if (adapter->num_vfs > 32)
2394 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
2395 }
2396 IXGBE_WRITE_FLUSH(&adapter->hw);
2397 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2398 int i;
2399 for (i = 0; i < adapter->num_msix_vectors; i++)
2400 synchronize_irq(adapter->msix_entries[i].vector);
2401 } else {
2402 synchronize_irq(adapter->pdev->irq);
2403 }
2404 }
2405
2406 /**
2407 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
2408 *
2409 **/
2410 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
2411 {
2412 struct ixgbe_hw *hw = &adapter->hw;
2413
2414 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
2415 EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr_param));
2416
2417 ixgbe_set_ivar(adapter, 0, 0, 0);
2418 ixgbe_set_ivar(adapter, 1, 0, 0);
2419
2420 map_vector_to_rxq(adapter, 0, 0);
2421 map_vector_to_txq(adapter, 0, 0);
2422
2423 e_info("Legacy interrupt IVAR setup done\n");
2424 }
2425
2426 /**
2427 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
2428 * @adapter: board private structure
2429 *
2430 * Configure the Tx unit of the MAC after a reset.
2431 **/
2432 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
2433 {
2434 u64 tdba;
2435 struct ixgbe_hw *hw = &adapter->hw;
2436 u32 i, j, tdlen, txctrl;
2437
2438 /* Setup the HW Tx Head and Tail descriptor pointers */
2439 for (i = 0; i < adapter->num_tx_queues; i++) {
2440 struct ixgbe_ring *ring = adapter->tx_ring[i];
2441 j = ring->reg_idx;
2442 tdba = ring->dma;
2443 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
2444 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(j),
2445 (tdba & DMA_BIT_MASK(32)));
2446 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(j), (tdba >> 32));
2447 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(j), tdlen);
2448 IXGBE_WRITE_REG(hw, IXGBE_TDH(j), 0);
2449 IXGBE_WRITE_REG(hw, IXGBE_TDT(j), 0);
2450 adapter->tx_ring[i]->head = IXGBE_TDH(j);
2451 adapter->tx_ring[i]->tail = IXGBE_TDT(j);
2452 /*
2453 * Disable Tx Head Writeback RO bit, since this hoses
2454 * bookkeeping if things aren't delivered in order.
2455 */
2456 switch (hw->mac.type) {
2457 case ixgbe_mac_82598EB:
2458 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(j));
2459 break;
2460 case ixgbe_mac_82599EB:
2461 default:
2462 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(j));
2463 break;
2464 }
2465 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
2466 switch (hw->mac.type) {
2467 case ixgbe_mac_82598EB:
2468 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(j), txctrl);
2469 break;
2470 case ixgbe_mac_82599EB:
2471 default:
2472 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(j), txctrl);
2473 break;
2474 }
2475 }
2476
2477 if (hw->mac.type == ixgbe_mac_82599EB) {
2478 u32 rttdcs;
2479 u32 mask;
2480
2481 /* disable the arbiter while setting MTQC */
2482 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
2483 rttdcs |= IXGBE_RTTDCS_ARBDIS;
2484 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2485
2486 /* set transmit pool layout */
2487 mask = (IXGBE_FLAG_SRIOV_ENABLED | IXGBE_FLAG_DCB_ENABLED);
2488 switch (adapter->flags & mask) {
2489
2490 case (IXGBE_FLAG_SRIOV_ENABLED):
2491 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2492 (IXGBE_MTQC_VT_ENA | IXGBE_MTQC_64VF));
2493 break;
2494
2495 case (IXGBE_FLAG_DCB_ENABLED):
2496 /* We enable 8 traffic classes, DCB only */
2497 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2498 (IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ));
2499 break;
2500
2501 default:
2502 IXGBE_WRITE_REG(hw, IXGBE_MTQC, IXGBE_MTQC_64Q_1PB);
2503 break;
2504 }
2505
2506 /* re-eable the arbiter */
2507 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
2508 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2509 }
2510 }
2511
2512 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
2513
2514 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
2515 struct ixgbe_ring *rx_ring)
2516 {
2517 u32 srrctl;
2518 int index;
2519 struct ixgbe_ring_feature *feature = adapter->ring_feature;
2520
2521 index = rx_ring->reg_idx;
2522 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2523 unsigned long mask;
2524 mask = (unsigned long) feature[RING_F_RSS].mask;
2525 index = index & mask;
2526 }
2527 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
2528
2529 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
2530 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
2531
2532 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
2533 IXGBE_SRRCTL_BSIZEHDR_MASK;
2534
2535 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2536 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
2537 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2538 #else
2539 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2540 #endif
2541 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
2542 } else {
2543 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
2544 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2545 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
2546 }
2547
2548 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
2549 }
2550
2551 static u32 ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
2552 {
2553 u32 mrqc = 0;
2554 int mask;
2555
2556 if (!(adapter->hw.mac.type == ixgbe_mac_82599EB))
2557 return mrqc;
2558
2559 mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
2560 #ifdef CONFIG_IXGBE_DCB
2561 | IXGBE_FLAG_DCB_ENABLED
2562 #endif
2563 | IXGBE_FLAG_SRIOV_ENABLED
2564 );
2565
2566 switch (mask) {
2567 case (IXGBE_FLAG_RSS_ENABLED):
2568 mrqc = IXGBE_MRQC_RSSEN;
2569 break;
2570 case (IXGBE_FLAG_SRIOV_ENABLED):
2571 mrqc = IXGBE_MRQC_VMDQEN;
2572 break;
2573 #ifdef CONFIG_IXGBE_DCB
2574 case (IXGBE_FLAG_DCB_ENABLED):
2575 mrqc = IXGBE_MRQC_RT8TCEN;
2576 break;
2577 #endif /* CONFIG_IXGBE_DCB */
2578 default:
2579 break;
2580 }
2581
2582 return mrqc;
2583 }
2584
2585 /**
2586 * ixgbe_configure_rscctl - enable RSC for the indicated ring
2587 * @adapter: address of board private structure
2588 * @index: index of ring to set
2589 **/
2590 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter, int index)
2591 {
2592 struct ixgbe_ring *rx_ring;
2593 struct ixgbe_hw *hw = &adapter->hw;
2594 int j;
2595 u32 rscctrl;
2596 int rx_buf_len;
2597
2598 rx_ring = adapter->rx_ring[index];
2599 j = rx_ring->reg_idx;
2600 rx_buf_len = rx_ring->rx_buf_len;
2601 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(j));
2602 rscctrl |= IXGBE_RSCCTL_RSCEN;
2603 /*
2604 * we must limit the number of descriptors so that the
2605 * total size of max desc * buf_len is not greater
2606 * than 65535
2607 */
2608 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2609 #if (MAX_SKB_FRAGS > 16)
2610 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2611 #elif (MAX_SKB_FRAGS > 8)
2612 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2613 #elif (MAX_SKB_FRAGS > 4)
2614 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2615 #else
2616 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2617 #endif
2618 } else {
2619 if (rx_buf_len < IXGBE_RXBUFFER_4096)
2620 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2621 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
2622 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2623 else
2624 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2625 }
2626 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(j), rscctrl);
2627 }
2628
2629 /**
2630 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
2631 * @adapter: board private structure
2632 *
2633 * Configure the Rx unit of the MAC after a reset.
2634 **/
2635 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
2636 {
2637 u64 rdba;
2638 struct ixgbe_hw *hw = &adapter->hw;
2639 struct ixgbe_ring *rx_ring;
2640 struct net_device *netdev = adapter->netdev;
2641 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2642 int i, j;
2643 u32 rdlen, rxctrl, rxcsum;
2644 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2645 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2646 0x6A3E67EA, 0x14364D17, 0x3BED200D};
2647 u32 fctrl, hlreg0;
2648 u32 reta = 0, mrqc = 0;
2649 u32 rdrxctl;
2650 int rx_buf_len;
2651
2652 /* Decide whether to use packet split mode or not */
2653 /* Do not use packet split if we're in SR-IOV Mode */
2654 if (!adapter->num_vfs)
2655 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
2656
2657 /* Set the RX buffer length according to the mode */
2658 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
2659 rx_buf_len = IXGBE_RX_HDR_SIZE;
2660 if (hw->mac.type == ixgbe_mac_82599EB) {
2661 /* PSRTYPE must be initialized in 82599 */
2662 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
2663 IXGBE_PSRTYPE_UDPHDR |
2664 IXGBE_PSRTYPE_IPV4HDR |
2665 IXGBE_PSRTYPE_IPV6HDR |
2666 IXGBE_PSRTYPE_L2HDR;
2667 IXGBE_WRITE_REG(hw,
2668 IXGBE_PSRTYPE(adapter->num_vfs),
2669 psrtype);
2670 }
2671 } else {
2672 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
2673 (netdev->mtu <= ETH_DATA_LEN))
2674 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
2675 else
2676 rx_buf_len = ALIGN(max_frame, 1024);
2677 }
2678
2679 fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
2680 fctrl |= IXGBE_FCTRL_BAM;
2681 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
2682 fctrl |= IXGBE_FCTRL_PMCF;
2683 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
2684
2685 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
2686 if (adapter->netdev->mtu <= ETH_DATA_LEN)
2687 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
2688 else
2689 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2690 #ifdef IXGBE_FCOE
2691 if (netdev->features & NETIF_F_FCOE_MTU)
2692 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2693 #endif
2694 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
2695
2696 rdlen = adapter->rx_ring[0]->count * sizeof(union ixgbe_adv_rx_desc);
2697 /* disable receives while setting up the descriptors */
2698 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2699 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2700
2701 /*
2702 * Setup the HW Rx Head and Tail Descriptor Pointers and
2703 * the Base and Length of the Rx Descriptor Ring
2704 */
2705 for (i = 0; i < adapter->num_rx_queues; i++) {
2706 rx_ring = adapter->rx_ring[i];
2707 rdba = rx_ring->dma;
2708 j = rx_ring->reg_idx;
2709 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(j), (rdba & DMA_BIT_MASK(32)));
2710 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(j), (rdba >> 32));
2711 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(j), rdlen);
2712 IXGBE_WRITE_REG(hw, IXGBE_RDH(j), 0);
2713 IXGBE_WRITE_REG(hw, IXGBE_RDT(j), 0);
2714 rx_ring->head = IXGBE_RDH(j);
2715 rx_ring->tail = IXGBE_RDT(j);
2716 rx_ring->rx_buf_len = rx_buf_len;
2717
2718 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
2719 rx_ring->flags |= IXGBE_RING_RX_PS_ENABLED;
2720 else
2721 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2722
2723 #ifdef IXGBE_FCOE
2724 if (netdev->features & NETIF_F_FCOE_MTU) {
2725 struct ixgbe_ring_feature *f;
2726 f = &adapter->ring_feature[RING_F_FCOE];
2727 if ((i >= f->mask) && (i < f->mask + f->indices)) {
2728 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2729 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
2730 rx_ring->rx_buf_len =
2731 IXGBE_FCOE_JUMBO_FRAME_SIZE;
2732 }
2733 }
2734
2735 #endif /* IXGBE_FCOE */
2736 ixgbe_configure_srrctl(adapter, rx_ring);
2737 }
2738
2739 if (hw->mac.type == ixgbe_mac_82598EB) {
2740 /*
2741 * For VMDq support of different descriptor types or
2742 * buffer sizes through the use of multiple SRRCTL
2743 * registers, RDRXCTL.MVMEN must be set to 1
2744 *
2745 * also, the manual doesn't mention it clearly but DCA hints
2746 * will only use queue 0's tags unless this bit is set. Side
2747 * effects of setting this bit are only that SRRCTL must be
2748 * fully programmed [0..15]
2749 */
2750 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2751 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
2752 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2753 }
2754
2755 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
2756 u32 vt_reg_bits;
2757 u32 reg_offset, vf_shift;
2758 u32 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
2759 vt_reg_bits = IXGBE_VMD_CTL_VMDQ_EN
2760 | IXGBE_VT_CTL_REPLEN;
2761 vt_reg_bits |= (adapter->num_vfs <<
2762 IXGBE_VT_CTL_POOL_SHIFT);
2763 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl | vt_reg_bits);
2764 IXGBE_WRITE_REG(hw, IXGBE_MRQC, 0);
2765
2766 vf_shift = adapter->num_vfs % 32;
2767 reg_offset = adapter->num_vfs / 32;
2768 IXGBE_WRITE_REG(hw, IXGBE_VFRE(0), 0);
2769 IXGBE_WRITE_REG(hw, IXGBE_VFRE(1), 0);
2770 IXGBE_WRITE_REG(hw, IXGBE_VFTE(0), 0);
2771 IXGBE_WRITE_REG(hw, IXGBE_VFTE(1), 0);
2772 /* Enable only the PF's pool for Tx/Rx */
2773 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (1 << vf_shift));
2774 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (1 << vf_shift));
2775 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
2776 ixgbe_set_vmolr(hw, adapter->num_vfs, true);
2777 }
2778
2779 /* Program MRQC for the distribution of queues */
2780 mrqc = ixgbe_setup_mrqc(adapter);
2781
2782 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
2783 /* Fill out redirection table */
2784 for (i = 0, j = 0; i < 128; i++, j++) {
2785 if (j == adapter->ring_feature[RING_F_RSS].indices)
2786 j = 0;
2787 /* reta = 4-byte sliding window of
2788 * 0x00..(indices-1)(indices-1)00..etc. */
2789 reta = (reta << 8) | (j * 0x11);
2790 if ((i & 3) == 3)
2791 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2792 }
2793
2794 /* Fill out hash function seeds */
2795 for (i = 0; i < 10; i++)
2796 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2797
2798 if (hw->mac.type == ixgbe_mac_82598EB)
2799 mrqc |= IXGBE_MRQC_RSSEN;
2800 /* Perform hash on these packet types */
2801 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2802 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2803 | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
2804 | IXGBE_MRQC_RSS_FIELD_IPV6
2805 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
2806 | IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
2807 }
2808 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2809
2810 if (adapter->num_vfs) {
2811 u32 reg;
2812
2813 /* Map PF MAC address in RAR Entry 0 to first pool
2814 * following VFs */
2815 hw->mac.ops.set_vmdq(hw, 0, adapter->num_vfs);
2816
2817 /* Set up VF register offsets for selected VT Mode, i.e.
2818 * 64 VFs for SR-IOV */
2819 reg = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
2820 reg |= IXGBE_GCR_EXT_SRIOV;
2821 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, reg);
2822 }
2823
2824 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2825
2826 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED ||
2827 adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
2828 /* Disable indicating checksum in descriptor, enables
2829 * RSS hash */
2830 rxcsum |= IXGBE_RXCSUM_PCSD;
2831 }
2832 if (!(rxcsum & IXGBE_RXCSUM_PCSD)) {
2833 /* Enable IPv4 payload checksum for UDP fragments
2834 * if PCSD is not set */
2835 rxcsum |= IXGBE_RXCSUM_IPPCSE;
2836 }
2837
2838 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2839
2840 if (hw->mac.type == ixgbe_mac_82599EB) {
2841 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2842 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
2843 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
2844 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2845 }
2846
2847 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
2848 /* Enable 82599 HW-RSC */
2849 for (i = 0; i < adapter->num_rx_queues; i++)
2850 ixgbe_configure_rscctl(adapter, i);
2851
2852 /* Disable RSC for ACK packets */
2853 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
2854 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
2855 }
2856 }
2857
2858 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2859 {
2860 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2861 struct ixgbe_hw *hw = &adapter->hw;
2862 int pool_ndx = adapter->num_vfs;
2863
2864 /* add VID to filter table */
2865 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, true);
2866 }
2867
2868 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2869 {
2870 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2871 struct ixgbe_hw *hw = &adapter->hw;
2872 int pool_ndx = adapter->num_vfs;
2873
2874 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2875 ixgbe_irq_disable(adapter);
2876
2877 vlan_group_set_device(adapter->vlgrp, vid, NULL);
2878
2879 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2880 ixgbe_irq_enable(adapter);
2881
2882 /* remove VID from filter table */
2883 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, false);
2884 }
2885
2886 /**
2887 * ixgbe_vlan_filter_disable - helper to disable hw vlan filtering
2888 * @adapter: driver data
2889 */
2890 static void ixgbe_vlan_filter_disable(struct ixgbe_adapter *adapter)
2891 {
2892 struct ixgbe_hw *hw = &adapter->hw;
2893 u32 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2894 int i, j;
2895
2896 switch (hw->mac.type) {
2897 case ixgbe_mac_82598EB:
2898 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
2899 #ifdef CONFIG_IXGBE_DCB
2900 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
2901 vlnctrl &= ~IXGBE_VLNCTRL_VME;
2902 #endif
2903 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2904 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2905 break;
2906 case ixgbe_mac_82599EB:
2907 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
2908 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2909 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2910 #ifdef CONFIG_IXGBE_DCB
2911 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
2912 break;
2913 #endif
2914 for (i = 0; i < adapter->num_rx_queues; i++) {
2915 j = adapter->rx_ring[i]->reg_idx;
2916 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2917 vlnctrl &= ~IXGBE_RXDCTL_VME;
2918 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
2919 }
2920 break;
2921 default:
2922 break;
2923 }
2924 }
2925
2926 /**
2927 * ixgbe_vlan_filter_enable - helper to enable hw vlan filtering
2928 * @adapter: driver data
2929 */
2930 static void ixgbe_vlan_filter_enable(struct ixgbe_adapter *adapter)
2931 {
2932 struct ixgbe_hw *hw = &adapter->hw;
2933 u32 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2934 int i, j;
2935
2936 switch (hw->mac.type) {
2937 case ixgbe_mac_82598EB:
2938 vlnctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2939 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2940 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2941 break;
2942 case ixgbe_mac_82599EB:
2943 vlnctrl |= IXGBE_VLNCTRL_VFE;
2944 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2945 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2946 for (i = 0; i < adapter->num_rx_queues; i++) {
2947 j = adapter->rx_ring[i]->reg_idx;
2948 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2949 vlnctrl |= IXGBE_RXDCTL_VME;
2950 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
2951 }
2952 break;
2953 default:
2954 break;
2955 }
2956 }
2957
2958 static void ixgbe_vlan_rx_register(struct net_device *netdev,
2959 struct vlan_group *grp)
2960 {
2961 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2962
2963 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2964 ixgbe_irq_disable(adapter);
2965 adapter->vlgrp = grp;
2966
2967 /*
2968 * For a DCB driver, always enable VLAN tag stripping so we can
2969 * still receive traffic from a DCB-enabled host even if we're
2970 * not in DCB mode.
2971 */
2972 ixgbe_vlan_filter_enable(adapter);
2973
2974 ixgbe_vlan_rx_add_vid(netdev, 0);
2975
2976 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2977 ixgbe_irq_enable(adapter);
2978 }
2979
2980 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
2981 {
2982 ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2983
2984 if (adapter->vlgrp) {
2985 u16 vid;
2986 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2987 if (!vlan_group_get_device(adapter->vlgrp, vid))
2988 continue;
2989 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
2990 }
2991 }
2992 }
2993
2994 /**
2995 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
2996 * @netdev: network interface device structure
2997 *
2998 * Writes unicast address list to the RAR table.
2999 * Returns: -ENOMEM on failure/insufficient address space
3000 * 0 on no addresses written
3001 * X on writing X addresses to the RAR table
3002 **/
3003 static int ixgbe_write_uc_addr_list(struct net_device *netdev)
3004 {
3005 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3006 struct ixgbe_hw *hw = &adapter->hw;
3007 unsigned int vfn = adapter->num_vfs;
3008 unsigned int rar_entries = hw->mac.num_rar_entries - (vfn + 1);
3009 int count = 0;
3010
3011 /* return ENOMEM indicating insufficient memory for addresses */
3012 if (netdev_uc_count(netdev) > rar_entries)
3013 return -ENOMEM;
3014
3015 if (!netdev_uc_empty(netdev) && rar_entries) {
3016 struct netdev_hw_addr *ha;
3017 /* return error if we do not support writing to RAR table */
3018 if (!hw->mac.ops.set_rar)
3019 return -ENOMEM;
3020
3021 netdev_for_each_uc_addr(ha, netdev) {
3022 if (!rar_entries)
3023 break;
3024 hw->mac.ops.set_rar(hw, rar_entries--, ha->addr,
3025 vfn, IXGBE_RAH_AV);
3026 count++;
3027 }
3028 }
3029 /* write the addresses in reverse order to avoid write combining */
3030 for (; rar_entries > 0 ; rar_entries--)
3031 hw->mac.ops.clear_rar(hw, rar_entries);
3032
3033 return count;
3034 }
3035
3036 /**
3037 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
3038 * @netdev: network interface device structure
3039 *
3040 * The set_rx_method entry point is called whenever the unicast/multicast
3041 * address list or the network interface flags are updated. This routine is
3042 * responsible for configuring the hardware for proper unicast, multicast and
3043 * promiscuous mode.
3044 **/
3045 void ixgbe_set_rx_mode(struct net_device *netdev)
3046 {
3047 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3048 struct ixgbe_hw *hw = &adapter->hw;
3049 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
3050 int count;
3051
3052 /* Check for Promiscuous and All Multicast modes */
3053
3054 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3055
3056 /* clear the bits we are changing the status of */
3057 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3058
3059 if (netdev->flags & IFF_PROMISC) {
3060 hw->addr_ctrl.user_set_promisc = true;
3061 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3062 vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_MPE);
3063 /* don't hardware filter vlans in promisc mode */
3064 ixgbe_vlan_filter_disable(adapter);
3065 } else {
3066 if (netdev->flags & IFF_ALLMULTI) {
3067 fctrl |= IXGBE_FCTRL_MPE;
3068 vmolr |= IXGBE_VMOLR_MPE;
3069 } else {
3070 /*
3071 * Write addresses to the MTA, if the attempt fails
3072 * then we should just turn on promiscous mode so
3073 * that we can at least receive multicast traffic
3074 */
3075 hw->mac.ops.update_mc_addr_list(hw, netdev);
3076 vmolr |= IXGBE_VMOLR_ROMPE;
3077 }
3078 ixgbe_vlan_filter_enable(adapter);
3079 hw->addr_ctrl.user_set_promisc = false;
3080 /*
3081 * Write addresses to available RAR registers, if there is not
3082 * sufficient space to store all the addresses then enable
3083 * unicast promiscous mode
3084 */
3085 count = ixgbe_write_uc_addr_list(netdev);
3086 if (count < 0) {
3087 fctrl |= IXGBE_FCTRL_UPE;
3088 vmolr |= IXGBE_VMOLR_ROPE;
3089 }
3090 }
3091
3092 if (adapter->num_vfs) {
3093 ixgbe_restore_vf_multicasts(adapter);
3094 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(adapter->num_vfs)) &
3095 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
3096 IXGBE_VMOLR_ROPE);
3097 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(adapter->num_vfs), vmolr);
3098 }
3099
3100 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
3101 }
3102
3103 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
3104 {
3105 int q_idx;
3106 struct ixgbe_q_vector *q_vector;
3107 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3108
3109 /* legacy and MSI only use one vector */
3110 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3111 q_vectors = 1;
3112
3113 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3114 struct napi_struct *napi;
3115 q_vector = adapter->q_vector[q_idx];
3116 napi = &q_vector->napi;
3117 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3118 if (!q_vector->rxr_count || !q_vector->txr_count) {
3119 if (q_vector->txr_count == 1)
3120 napi->poll = &ixgbe_clean_txonly;
3121 else if (q_vector->rxr_count == 1)
3122 napi->poll = &ixgbe_clean_rxonly;
3123 }
3124 }
3125
3126 napi_enable(napi);
3127 }
3128 }
3129
3130 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
3131 {
3132 int q_idx;
3133 struct ixgbe_q_vector *q_vector;
3134 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3135
3136 /* legacy and MSI only use one vector */
3137 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3138 q_vectors = 1;
3139
3140 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3141 q_vector = adapter->q_vector[q_idx];
3142 napi_disable(&q_vector->napi);
3143 }
3144 }
3145
3146 #ifdef CONFIG_IXGBE_DCB
3147 /*
3148 * ixgbe_configure_dcb - Configure DCB hardware
3149 * @adapter: ixgbe adapter struct
3150 *
3151 * This is called by the driver on open to configure the DCB hardware.
3152 * This is also called by the gennetlink interface when reconfiguring
3153 * the DCB state.
3154 */
3155 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
3156 {
3157 struct ixgbe_hw *hw = &adapter->hw;
3158 u32 txdctl;
3159 int i, j;
3160
3161 ixgbe_dcb_check_config(&adapter->dcb_cfg);
3162 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_TX_CONFIG);
3163 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_RX_CONFIG);
3164
3165 /* reconfigure the hardware */
3166 ixgbe_dcb_hw_config(&adapter->hw, &adapter->dcb_cfg);
3167
3168 for (i = 0; i < adapter->num_tx_queues; i++) {
3169 j = adapter->tx_ring[i]->reg_idx;
3170 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3171 /* PThresh workaround for Tx hang with DFP enabled. */
3172 txdctl |= 32;
3173 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
3174 }
3175 /* Enable VLAN tag insert/strip */
3176 ixgbe_vlan_filter_enable(adapter);
3177
3178 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
3179 }
3180
3181 #endif
3182 static void ixgbe_configure(struct ixgbe_adapter *adapter)
3183 {
3184 struct net_device *netdev = adapter->netdev;
3185 struct ixgbe_hw *hw = &adapter->hw;
3186 int i;
3187
3188 ixgbe_set_rx_mode(netdev);
3189
3190 ixgbe_restore_vlan(adapter);
3191 #ifdef CONFIG_IXGBE_DCB
3192 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3193 if (hw->mac.type == ixgbe_mac_82598EB)
3194 netif_set_gso_max_size(netdev, 32768);
3195 else
3196 netif_set_gso_max_size(netdev, 65536);
3197 ixgbe_configure_dcb(adapter);
3198 } else {
3199 netif_set_gso_max_size(netdev, 65536);
3200 }
3201 #else
3202 netif_set_gso_max_size(netdev, 65536);
3203 #endif
3204
3205 #ifdef IXGBE_FCOE
3206 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
3207 ixgbe_configure_fcoe(adapter);
3208
3209 #endif /* IXGBE_FCOE */
3210 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3211 for (i = 0; i < adapter->num_tx_queues; i++)
3212 adapter->tx_ring[i]->atr_sample_rate =
3213 adapter->atr_sample_rate;
3214 ixgbe_init_fdir_signature_82599(hw, adapter->fdir_pballoc);
3215 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
3216 ixgbe_init_fdir_perfect_82599(hw, adapter->fdir_pballoc);
3217 }
3218
3219 ixgbe_configure_tx(adapter);
3220 ixgbe_configure_rx(adapter);
3221 for (i = 0; i < adapter->num_rx_queues; i++)
3222 ixgbe_alloc_rx_buffers(adapter, adapter->rx_ring[i],
3223 (adapter->rx_ring[i]->count - 1));
3224 }
3225
3226 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
3227 {
3228 switch (hw->phy.type) {
3229 case ixgbe_phy_sfp_avago:
3230 case ixgbe_phy_sfp_ftl:
3231 case ixgbe_phy_sfp_intel:
3232 case ixgbe_phy_sfp_unknown:
3233 case ixgbe_phy_sfp_passive_tyco:
3234 case ixgbe_phy_sfp_passive_unknown:
3235 case ixgbe_phy_sfp_active_unknown:
3236 case ixgbe_phy_sfp_ftl_active:
3237 return true;
3238 default:
3239 return false;
3240 }
3241 }
3242
3243 /**
3244 * ixgbe_sfp_link_config - set up SFP+ link
3245 * @adapter: pointer to private adapter struct
3246 **/
3247 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
3248 {
3249 struct ixgbe_hw *hw = &adapter->hw;
3250
3251 if (hw->phy.multispeed_fiber) {
3252 /*
3253 * In multispeed fiber setups, the device may not have
3254 * had a physical connection when the driver loaded.
3255 * If that's the case, the initial link configuration
3256 * couldn't get the MAC into 10G or 1G mode, so we'll
3257 * never have a link status change interrupt fire.
3258 * We need to try and force an autonegotiation
3259 * session, then bring up link.
3260 */
3261 hw->mac.ops.setup_sfp(hw);
3262 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
3263 schedule_work(&adapter->multispeed_fiber_task);
3264 } else {
3265 /*
3266 * Direct Attach Cu and non-multispeed fiber modules
3267 * still need to be configured properly prior to
3268 * attempting link.
3269 */
3270 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_MOD_TASK))
3271 schedule_work(&adapter->sfp_config_module_task);
3272 }
3273 }
3274
3275 /**
3276 * ixgbe_non_sfp_link_config - set up non-SFP+ link
3277 * @hw: pointer to private hardware struct
3278 *
3279 * Returns 0 on success, negative on failure
3280 **/
3281 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
3282 {
3283 u32 autoneg;
3284 bool negotiation, link_up = false;
3285 u32 ret = IXGBE_ERR_LINK_SETUP;
3286
3287 if (hw->mac.ops.check_link)
3288 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
3289
3290 if (ret)
3291 goto link_cfg_out;
3292
3293 if (hw->mac.ops.get_link_capabilities)
3294 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
3295 if (ret)
3296 goto link_cfg_out;
3297
3298 if (hw->mac.ops.setup_link)
3299 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
3300 link_cfg_out:
3301 return ret;
3302 }
3303
3304 #define IXGBE_MAX_RX_DESC_POLL 10
3305 static inline void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
3306 int rxr)
3307 {
3308 int j = adapter->rx_ring[rxr]->reg_idx;
3309 int k;
3310
3311 for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) {
3312 if (IXGBE_READ_REG(&adapter->hw,
3313 IXGBE_RXDCTL(j)) & IXGBE_RXDCTL_ENABLE)
3314 break;
3315 else
3316 msleep(1);
3317 }
3318 if (k >= IXGBE_MAX_RX_DESC_POLL) {
3319 e_err("RXDCTL.ENABLE on Rx queue %d not set within "
3320 "the polling period\n", rxr);
3321 }
3322 ixgbe_release_rx_desc(&adapter->hw, adapter->rx_ring[rxr],
3323 (adapter->rx_ring[rxr]->count - 1));
3324 }
3325
3326 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
3327 {
3328 struct net_device *netdev = adapter->netdev;
3329 struct ixgbe_hw *hw = &adapter->hw;
3330 int i, j = 0;
3331 int num_rx_rings = adapter->num_rx_queues;
3332 int err;
3333 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3334 u32 txdctl, rxdctl, mhadd;
3335 u32 dmatxctl;
3336 u32 gpie;
3337 u32 ctrl_ext;
3338
3339 ixgbe_get_hw_control(adapter);
3340
3341 if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) ||
3342 (adapter->flags & IXGBE_FLAG_MSI_ENABLED)) {
3343 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3344 gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
3345 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
3346 } else {
3347 /* MSI only */
3348 gpie = 0;
3349 }
3350 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3351 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
3352 gpie |= IXGBE_GPIE_VTMODE_64;
3353 }
3354 /* XXX: to interrupt immediately for EICS writes, enable this */
3355 /* gpie |= IXGBE_GPIE_EIMEN; */
3356 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3357 }
3358
3359 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3360 /*
3361 * use EIAM to auto-mask when MSI-X interrupt is asserted
3362 * this saves a register write for every interrupt
3363 */
3364 switch (hw->mac.type) {
3365 case ixgbe_mac_82598EB:
3366 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3367 break;
3368 default:
3369 case ixgbe_mac_82599EB:
3370 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
3371 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
3372 break;
3373 }
3374 } else {
3375 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
3376 * specifically only auto mask tx and rx interrupts */
3377 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3378 }
3379
3380 /* Enable Thermal over heat sensor interrupt */
3381 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
3382 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
3383 gpie |= IXGBE_SDP0_GPIEN;
3384 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3385 }
3386
3387 /* Enable fan failure interrupt if media type is copper */
3388 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
3389 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
3390 gpie |= IXGBE_SDP1_GPIEN;
3391 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3392 }
3393
3394 if (hw->mac.type == ixgbe_mac_82599EB) {
3395 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
3396 gpie |= IXGBE_SDP1_GPIEN;
3397 gpie |= IXGBE_SDP2_GPIEN;
3398 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3399 }
3400
3401 #ifdef IXGBE_FCOE
3402 /* adjust max frame to be able to do baby jumbo for FCoE */
3403 if ((netdev->features & NETIF_F_FCOE_MTU) &&
3404 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
3405 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
3406
3407 #endif /* IXGBE_FCOE */
3408 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
3409 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
3410 mhadd &= ~IXGBE_MHADD_MFS_MASK;
3411 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
3412
3413 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
3414 }
3415
3416 for (i = 0; i < adapter->num_tx_queues; i++) {
3417 j = adapter->tx_ring[i]->reg_idx;
3418 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3419 if (adapter->rx_itr_setting == 0) {
3420 /* cannot set wthresh when itr==0 */
3421 txdctl &= ~0x007F0000;
3422 } else {
3423 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
3424 txdctl |= (8 << 16);
3425 }
3426 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
3427 }
3428
3429 if (hw->mac.type == ixgbe_mac_82599EB) {
3430 /* DMATXCTL.EN must be set after all Tx queue config is done */
3431 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
3432 dmatxctl |= IXGBE_DMATXCTL_TE;
3433 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
3434 }
3435 for (i = 0; i < adapter->num_tx_queues; i++) {
3436 j = adapter->tx_ring[i]->reg_idx;
3437 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3438 txdctl |= IXGBE_TXDCTL_ENABLE;
3439 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
3440 if (hw->mac.type == ixgbe_mac_82599EB) {
3441 int wait_loop = 10;
3442 /* poll for Tx Enable ready */
3443 do {
3444 msleep(1);
3445 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3446 } while (--wait_loop &&
3447 !(txdctl & IXGBE_TXDCTL_ENABLE));
3448 if (!wait_loop)
3449 e_err("Could not enable Tx Queue %d\n", j);
3450 }
3451 }
3452
3453 for (i = 0; i < num_rx_rings; i++) {
3454 j = adapter->rx_ring[i]->reg_idx;
3455 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3456 /* enable PTHRESH=32 descriptors (half the internal cache)
3457 * and HTHRESH=0 descriptors (to minimize latency on fetch),
3458 * this also removes a pesky rx_no_buffer_count increment */
3459 rxdctl |= 0x0020;
3460 rxdctl |= IXGBE_RXDCTL_ENABLE;
3461 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), rxdctl);
3462 if (hw->mac.type == ixgbe_mac_82599EB)
3463 ixgbe_rx_desc_queue_enable(adapter, i);
3464 }
3465 /* enable all receives */
3466 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3467 if (hw->mac.type == ixgbe_mac_82598EB)
3468 rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
3469 else
3470 rxdctl |= IXGBE_RXCTRL_RXEN;
3471 hw->mac.ops.enable_rx_dma(hw, rxdctl);
3472
3473 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3474 ixgbe_configure_msix(adapter);
3475 else
3476 ixgbe_configure_msi_and_legacy(adapter);
3477
3478 /* enable the optics */
3479 if (hw->phy.multispeed_fiber)
3480 hw->mac.ops.enable_tx_laser(hw);
3481
3482 clear_bit(__IXGBE_DOWN, &adapter->state);
3483 ixgbe_napi_enable_all(adapter);
3484
3485 /* clear any pending interrupts, may auto mask */
3486 IXGBE_READ_REG(hw, IXGBE_EICR);
3487
3488 ixgbe_irq_enable(adapter);
3489
3490 /*
3491 * If this adapter has a fan, check to see if we had a failure
3492 * before we enabled the interrupt.
3493 */
3494 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
3495 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
3496 if (esdp & IXGBE_ESDP_SDP1)
3497 e_crit("Fan has stopped, replace the adapter\n");
3498 }
3499
3500 /*
3501 * For hot-pluggable SFP+ devices, a new SFP+ module may have
3502 * arrived before interrupts were enabled but after probe. Such
3503 * devices wouldn't have their type identified yet. We need to
3504 * kick off the SFP+ module setup first, then try to bring up link.
3505 * If we're not hot-pluggable SFP+, we just need to configure link
3506 * and bring it up.
3507 */
3508 if (hw->phy.type == ixgbe_phy_unknown) {
3509 err = hw->phy.ops.identify(hw);
3510 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
3511 /*
3512 * Take the device down and schedule the sfp tasklet
3513 * which will unregister_netdev and log it.
3514 */
3515 ixgbe_down(adapter);
3516 schedule_work(&adapter->sfp_config_module_task);
3517 return err;
3518 }
3519 }
3520
3521 if (ixgbe_is_sfp(hw)) {
3522 ixgbe_sfp_link_config(adapter);
3523 } else {
3524 err = ixgbe_non_sfp_link_config(hw);
3525 if (err)
3526 e_err("link_config FAILED %d\n", err);
3527 }
3528
3529 for (i = 0; i < adapter->num_tx_queues; i++)
3530 set_bit(__IXGBE_FDIR_INIT_DONE,
3531 &(adapter->tx_ring[i]->reinit_state));
3532
3533 /* enable transmits */
3534 netif_tx_start_all_queues(netdev);
3535
3536 /* bring the link up in the watchdog, this could race with our first
3537 * link up interrupt but shouldn't be a problem */
3538 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
3539 adapter->link_check_timeout = jiffies;
3540 mod_timer(&adapter->watchdog_timer, jiffies);
3541
3542 /* Set PF Reset Done bit so PF/VF Mail Ops can work */
3543 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
3544 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
3545 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
3546
3547 return 0;
3548 }
3549
3550 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
3551 {
3552 WARN_ON(in_interrupt());
3553 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
3554 msleep(1);
3555 ixgbe_down(adapter);
3556 /*
3557 * If SR-IOV enabled then wait a bit before bringing the adapter
3558 * back up to give the VFs time to respond to the reset. The
3559 * two second wait is based upon the watchdog timer cycle in
3560 * the VF driver.
3561 */
3562 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3563 msleep(2000);
3564 ixgbe_up(adapter);
3565 clear_bit(__IXGBE_RESETTING, &adapter->state);
3566 }
3567
3568 int ixgbe_up(struct ixgbe_adapter *adapter)
3569 {
3570 /* hardware has been reset, we need to reload some things */
3571 ixgbe_configure(adapter);
3572
3573 return ixgbe_up_complete(adapter);
3574 }
3575
3576 void ixgbe_reset(struct ixgbe_adapter *adapter)
3577 {
3578 struct ixgbe_hw *hw = &adapter->hw;
3579 int err;
3580
3581 err = hw->mac.ops.init_hw(hw);
3582 switch (err) {
3583 case 0:
3584 case IXGBE_ERR_SFP_NOT_PRESENT:
3585 break;
3586 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
3587 e_dev_err("master disable timed out\n");
3588 break;
3589 case IXGBE_ERR_EEPROM_VERSION:
3590 /* We are running on a pre-production device, log a warning */
3591 e_dev_warn("This device is a pre-production adapter/LOM. "
3592 "Please be aware there may be issuesassociated with "
3593 "your hardware. If you are experiencing problems "
3594 "please contact your Intel or hardware "
3595 "representative who provided you with this "
3596 "hardware.\n");
3597 break;
3598 default:
3599 e_dev_err("Hardware Error: %d\n", err);
3600 }
3601
3602 /* reprogram the RAR[0] in case user changed it. */
3603 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
3604 IXGBE_RAH_AV);
3605 }
3606
3607 /**
3608 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
3609 * @adapter: board private structure
3610 * @rx_ring: ring to free buffers from
3611 **/
3612 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
3613 struct ixgbe_ring *rx_ring)
3614 {
3615 struct pci_dev *pdev = adapter->pdev;
3616 unsigned long size;
3617 unsigned int i;
3618
3619 /* Free all the Rx ring sk_buffs */
3620
3621 for (i = 0; i < rx_ring->count; i++) {
3622 struct ixgbe_rx_buffer *rx_buffer_info;
3623
3624 rx_buffer_info = &rx_ring->rx_buffer_info[i];
3625 if (rx_buffer_info->dma) {
3626 dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
3627 rx_ring->rx_buf_len,
3628 DMA_FROM_DEVICE);
3629 rx_buffer_info->dma = 0;
3630 }
3631 if (rx_buffer_info->skb) {
3632 struct sk_buff *skb = rx_buffer_info->skb;
3633 rx_buffer_info->skb = NULL;
3634 do {
3635 struct sk_buff *this = skb;
3636 if (IXGBE_RSC_CB(this)->delay_unmap) {
3637 dma_unmap_single(&pdev->dev,
3638 IXGBE_RSC_CB(this)->dma,
3639 rx_ring->rx_buf_len,
3640 DMA_FROM_DEVICE);
3641 IXGBE_RSC_CB(this)->dma = 0;
3642 IXGBE_RSC_CB(skb)->delay_unmap = false;
3643 }
3644 skb = skb->prev;
3645 dev_kfree_skb(this);
3646 } while (skb);
3647 }
3648 if (!rx_buffer_info->page)
3649 continue;
3650 if (rx_buffer_info->page_dma) {
3651 dma_unmap_page(&pdev->dev, rx_buffer_info->page_dma,
3652 PAGE_SIZE / 2, DMA_FROM_DEVICE);
3653 rx_buffer_info->page_dma = 0;
3654 }
3655 put_page(rx_buffer_info->page);
3656 rx_buffer_info->page = NULL;
3657 rx_buffer_info->page_offset = 0;
3658 }
3659
3660 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
3661 memset(rx_ring->rx_buffer_info, 0, size);
3662
3663 /* Zero out the descriptor ring */
3664 memset(rx_ring->desc, 0, rx_ring->size);
3665
3666 rx_ring->next_to_clean = 0;
3667 rx_ring->next_to_use = 0;
3668
3669 if (rx_ring->head)
3670 writel(0, adapter->hw.hw_addr + rx_ring->head);
3671 if (rx_ring->tail)
3672 writel(0, adapter->hw.hw_addr + rx_ring->tail);
3673 }
3674
3675 /**
3676 * ixgbe_clean_tx_ring - Free Tx Buffers
3677 * @adapter: board private structure
3678 * @tx_ring: ring to be cleaned
3679 **/
3680 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
3681 struct ixgbe_ring *tx_ring)
3682 {
3683 struct ixgbe_tx_buffer *tx_buffer_info;
3684 unsigned long size;
3685 unsigned int i;
3686
3687 /* Free all the Tx ring sk_buffs */
3688
3689 for (i = 0; i < tx_ring->count; i++) {
3690 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3691 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
3692 }
3693
3694 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
3695 memset(tx_ring->tx_buffer_info, 0, size);
3696
3697 /* Zero out the descriptor ring */
3698 memset(tx_ring->desc, 0, tx_ring->size);
3699
3700 tx_ring->next_to_use = 0;
3701 tx_ring->next_to_clean = 0;
3702
3703 if (tx_ring->head)
3704 writel(0, adapter->hw.hw_addr + tx_ring->head);
3705 if (tx_ring->tail)
3706 writel(0, adapter->hw.hw_addr + tx_ring->tail);
3707 }
3708
3709 /**
3710 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
3711 * @adapter: board private structure
3712 **/
3713 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
3714 {
3715 int i;
3716
3717 for (i = 0; i < adapter->num_rx_queues; i++)
3718 ixgbe_clean_rx_ring(adapter, adapter->rx_ring[i]);
3719 }
3720
3721 /**
3722 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
3723 * @adapter: board private structure
3724 **/
3725 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
3726 {
3727 int i;
3728
3729 for (i = 0; i < adapter->num_tx_queues; i++)
3730 ixgbe_clean_tx_ring(adapter, adapter->tx_ring[i]);
3731 }
3732
3733 void ixgbe_down(struct ixgbe_adapter *adapter)
3734 {
3735 struct net_device *netdev = adapter->netdev;
3736 struct ixgbe_hw *hw = &adapter->hw;
3737 u32 rxctrl;
3738 u32 txdctl;
3739 int i, j;
3740
3741 /* signal that we are down to the interrupt handler */
3742 set_bit(__IXGBE_DOWN, &adapter->state);
3743
3744 /* power down the optics */
3745 if (hw->phy.multispeed_fiber)
3746 hw->mac.ops.disable_tx_laser(hw);
3747
3748 /* disable receive for all VFs and wait one second */
3749 if (adapter->num_vfs) {
3750 /* ping all the active vfs to let them know we are going down */
3751 ixgbe_ping_all_vfs(adapter);
3752
3753 /* Disable all VFTE/VFRE TX/RX */
3754 ixgbe_disable_tx_rx(adapter);
3755
3756 /* Mark all the VFs as inactive */
3757 for (i = 0 ; i < adapter->num_vfs; i++)
3758 adapter->vfinfo[i].clear_to_send = 0;
3759 }
3760
3761 /* disable receives */
3762 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3763 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3764
3765 IXGBE_WRITE_FLUSH(hw);
3766 msleep(10);
3767
3768 netif_tx_stop_all_queues(netdev);
3769
3770 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3771 del_timer_sync(&adapter->sfp_timer);
3772 del_timer_sync(&adapter->watchdog_timer);
3773 cancel_work_sync(&adapter->watchdog_task);
3774
3775 netif_carrier_off(netdev);
3776 netif_tx_disable(netdev);
3777
3778 ixgbe_irq_disable(adapter);
3779
3780 ixgbe_napi_disable_all(adapter);
3781
3782 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3783 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
3784 cancel_work_sync(&adapter->fdir_reinit_task);
3785
3786 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
3787 cancel_work_sync(&adapter->check_overtemp_task);
3788
3789 /* disable transmits in the hardware now that interrupts are off */
3790 for (i = 0; i < adapter->num_tx_queues; i++) {
3791 j = adapter->tx_ring[i]->reg_idx;
3792 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3793 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
3794 (txdctl & ~IXGBE_TXDCTL_ENABLE));
3795 }
3796 /* Disable the Tx DMA engine on 82599 */
3797 if (hw->mac.type == ixgbe_mac_82599EB)
3798 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
3799 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
3800 ~IXGBE_DMATXCTL_TE));
3801
3802 /* clear n-tuple filters that are cached */
3803 ethtool_ntuple_flush(netdev);
3804
3805 if (!pci_channel_offline(adapter->pdev))
3806 ixgbe_reset(adapter);
3807 ixgbe_clean_all_tx_rings(adapter);
3808 ixgbe_clean_all_rx_rings(adapter);
3809
3810 #ifdef CONFIG_IXGBE_DCA
3811 /* since we reset the hardware DCA settings were cleared */
3812 ixgbe_setup_dca(adapter);
3813 #endif
3814 }
3815
3816 /**
3817 * ixgbe_poll - NAPI Rx polling callback
3818 * @napi: structure for representing this polling device
3819 * @budget: how many packets driver is allowed to clean
3820 *
3821 * This function is used for legacy and MSI, NAPI mode
3822 **/
3823 static int ixgbe_poll(struct napi_struct *napi, int budget)
3824 {
3825 struct ixgbe_q_vector *q_vector =
3826 container_of(napi, struct ixgbe_q_vector, napi);
3827 struct ixgbe_adapter *adapter = q_vector->adapter;
3828 int tx_clean_complete, work_done = 0;
3829
3830 #ifdef CONFIG_IXGBE_DCA
3831 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
3832 ixgbe_update_tx_dca(adapter, adapter->tx_ring[0]);
3833 ixgbe_update_rx_dca(adapter, adapter->rx_ring[0]);
3834 }
3835 #endif
3836
3837 tx_clean_complete = ixgbe_clean_tx_irq(q_vector, adapter->tx_ring[0]);
3838 ixgbe_clean_rx_irq(q_vector, adapter->rx_ring[0], &work_done, budget);
3839
3840 if (!tx_clean_complete)
3841 work_done = budget;
3842
3843 /* If budget not fully consumed, exit the polling mode */
3844 if (work_done < budget) {
3845 napi_complete(napi);
3846 if (adapter->rx_itr_setting & 1)
3847 ixgbe_set_itr(adapter);
3848 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3849 ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
3850 }
3851 return work_done;
3852 }
3853
3854 /**
3855 * ixgbe_tx_timeout - Respond to a Tx Hang
3856 * @netdev: network interface device structure
3857 **/
3858 static void ixgbe_tx_timeout(struct net_device *netdev)
3859 {
3860 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3861
3862 /* Do the reset outside of interrupt context */
3863 schedule_work(&adapter->reset_task);
3864 }
3865
3866 static void ixgbe_reset_task(struct work_struct *work)
3867 {
3868 struct ixgbe_adapter *adapter;
3869 adapter = container_of(work, struct ixgbe_adapter, reset_task);
3870
3871 /* If we're already down or resetting, just bail */
3872 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
3873 test_bit(__IXGBE_RESETTING, &adapter->state))
3874 return;
3875
3876 adapter->tx_timeout_count++;
3877
3878 ixgbe_dump(adapter);
3879 netdev_err(adapter->netdev, "Reset adapter\n");
3880 ixgbe_reinit_locked(adapter);
3881 }
3882
3883 #ifdef CONFIG_IXGBE_DCB
3884 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
3885 {
3886 bool ret = false;
3887 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_DCB];
3888
3889 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
3890 return ret;
3891
3892 f->mask = 0x7 << 3;
3893 adapter->num_rx_queues = f->indices;
3894 adapter->num_tx_queues = f->indices;
3895 ret = true;
3896
3897 return ret;
3898 }
3899 #endif
3900
3901 /**
3902 * ixgbe_set_rss_queues: Allocate queues for RSS
3903 * @adapter: board private structure to initialize
3904 *
3905 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
3906 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
3907 *
3908 **/
3909 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
3910 {
3911 bool ret = false;
3912 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
3913
3914 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3915 f->mask = 0xF;
3916 adapter->num_rx_queues = f->indices;
3917 adapter->num_tx_queues = f->indices;
3918 ret = true;
3919 } else {
3920 ret = false;
3921 }
3922
3923 return ret;
3924 }
3925
3926 /**
3927 * ixgbe_set_fdir_queues: Allocate queues for Flow Director
3928 * @adapter: board private structure to initialize
3929 *
3930 * Flow Director is an advanced Rx filter, attempting to get Rx flows back
3931 * to the original CPU that initiated the Tx session. This runs in addition
3932 * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
3933 * Rx load across CPUs using RSS.
3934 *
3935 **/
3936 static bool inline ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
3937 {
3938 bool ret = false;
3939 struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
3940
3941 f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
3942 f_fdir->mask = 0;
3943
3944 /* Flow Director must have RSS enabled */
3945 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3946 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3947 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)))) {
3948 adapter->num_tx_queues = f_fdir->indices;
3949 adapter->num_rx_queues = f_fdir->indices;
3950 ret = true;
3951 } else {
3952 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3953 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3954 }
3955 return ret;
3956 }
3957
3958 #ifdef IXGBE_FCOE
3959 /**
3960 * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
3961 * @adapter: board private structure to initialize
3962 *
3963 * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
3964 * The ring feature mask is not used as a mask for FCoE, as it can take any 8
3965 * rx queues out of the max number of rx queues, instead, it is used as the
3966 * index of the first rx queue used by FCoE.
3967 *
3968 **/
3969 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
3970 {
3971 bool ret = false;
3972 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3973
3974 f->indices = min((int)num_online_cpus(), f->indices);
3975 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3976 adapter->num_rx_queues = 1;
3977 adapter->num_tx_queues = 1;
3978 #ifdef CONFIG_IXGBE_DCB
3979 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3980 e_info("FCoE enabled with DCB\n");
3981 ixgbe_set_dcb_queues(adapter);
3982 }
3983 #endif
3984 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3985 e_info("FCoE enabled with RSS\n");
3986 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3987 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3988 ixgbe_set_fdir_queues(adapter);
3989 else
3990 ixgbe_set_rss_queues(adapter);
3991 }
3992 /* adding FCoE rx rings to the end */
3993 f->mask = adapter->num_rx_queues;
3994 adapter->num_rx_queues += f->indices;
3995 adapter->num_tx_queues += f->indices;
3996
3997 ret = true;
3998 }
3999
4000 return ret;
4001 }
4002
4003 #endif /* IXGBE_FCOE */
4004 /**
4005 * ixgbe_set_sriov_queues: Allocate queues for IOV use
4006 * @adapter: board private structure to initialize
4007 *
4008 * IOV doesn't actually use anything, so just NAK the
4009 * request for now and let the other queue routines
4010 * figure out what to do.
4011 */
4012 static inline bool ixgbe_set_sriov_queues(struct ixgbe_adapter *adapter)
4013 {
4014 return false;
4015 }
4016
4017 /*
4018 * ixgbe_set_num_queues: Allocate queues for device, feature dependant
4019 * @adapter: board private structure to initialize
4020 *
4021 * This is the top level queue allocation routine. The order here is very
4022 * important, starting with the "most" number of features turned on at once,
4023 * and ending with the smallest set of features. This way large combinations
4024 * can be allocated if they're turned on, and smaller combinations are the
4025 * fallthrough conditions.
4026 *
4027 **/
4028 static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
4029 {
4030 /* Start with base case */
4031 adapter->num_rx_queues = 1;
4032 adapter->num_tx_queues = 1;
4033 adapter->num_rx_pools = adapter->num_rx_queues;
4034 adapter->num_rx_queues_per_pool = 1;
4035
4036 if (ixgbe_set_sriov_queues(adapter))
4037 return;
4038
4039 #ifdef IXGBE_FCOE
4040 if (ixgbe_set_fcoe_queues(adapter))
4041 goto done;
4042
4043 #endif /* IXGBE_FCOE */
4044 #ifdef CONFIG_IXGBE_DCB
4045 if (ixgbe_set_dcb_queues(adapter))
4046 goto done;
4047
4048 #endif
4049 if (ixgbe_set_fdir_queues(adapter))
4050 goto done;
4051
4052 if (ixgbe_set_rss_queues(adapter))
4053 goto done;
4054
4055 /* fallback to base case */
4056 adapter->num_rx_queues = 1;
4057 adapter->num_tx_queues = 1;
4058
4059 done:
4060 /* Notify the stack of the (possibly) reduced Tx Queue count. */
4061 adapter->netdev->real_num_tx_queues = adapter->num_tx_queues;
4062 }
4063
4064 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
4065 int vectors)
4066 {
4067 int err, vector_threshold;
4068
4069 /* We'll want at least 3 (vector_threshold):
4070 * 1) TxQ[0] Cleanup
4071 * 2) RxQ[0] Cleanup
4072 * 3) Other (Link Status Change, etc.)
4073 * 4) TCP Timer (optional)
4074 */
4075 vector_threshold = MIN_MSIX_COUNT;
4076
4077 /* The more we get, the more we will assign to Tx/Rx Cleanup
4078 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
4079 * Right now, we simply care about how many we'll get; we'll
4080 * set them up later while requesting irq's.
4081 */
4082 while (vectors >= vector_threshold) {
4083 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
4084 vectors);
4085 if (!err) /* Success in acquiring all requested vectors. */
4086 break;
4087 else if (err < 0)
4088 vectors = 0; /* Nasty failure, quit now */
4089 else /* err == number of vectors we should try again with */
4090 vectors = err;
4091 }
4092
4093 if (vectors < vector_threshold) {
4094 /* Can't allocate enough MSI-X interrupts? Oh well.
4095 * This just means we'll go with either a single MSI
4096 * vector or fall back to legacy interrupts.
4097 */
4098 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4099 "Unable to allocate MSI-X interrupts\n");
4100 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4101 kfree(adapter->msix_entries);
4102 adapter->msix_entries = NULL;
4103 } else {
4104 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
4105 /*
4106 * Adjust for only the vectors we'll use, which is minimum
4107 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
4108 * vectors we were allocated.
4109 */
4110 adapter->num_msix_vectors = min(vectors,
4111 adapter->max_msix_q_vectors + NON_Q_VECTORS);
4112 }
4113 }
4114
4115 /**
4116 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
4117 * @adapter: board private structure to initialize
4118 *
4119 * Cache the descriptor ring offsets for RSS to the assigned rings.
4120 *
4121 **/
4122 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
4123 {
4124 int i;
4125 bool ret = false;
4126
4127 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4128 for (i = 0; i < adapter->num_rx_queues; i++)
4129 adapter->rx_ring[i]->reg_idx = i;
4130 for (i = 0; i < adapter->num_tx_queues; i++)
4131 adapter->tx_ring[i]->reg_idx = i;
4132 ret = true;
4133 } else {
4134 ret = false;
4135 }
4136
4137 return ret;
4138 }
4139
4140 #ifdef CONFIG_IXGBE_DCB
4141 /**
4142 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
4143 * @adapter: board private structure to initialize
4144 *
4145 * Cache the descriptor ring offsets for DCB to the assigned rings.
4146 *
4147 **/
4148 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
4149 {
4150 int i;
4151 bool ret = false;
4152 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
4153
4154 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4155 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
4156 /* the number of queues is assumed to be symmetric */
4157 for (i = 0; i < dcb_i; i++) {
4158 adapter->rx_ring[i]->reg_idx = i << 3;
4159 adapter->tx_ring[i]->reg_idx = i << 2;
4160 }
4161 ret = true;
4162 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
4163 if (dcb_i == 8) {
4164 /*
4165 * Tx TC0 starts at: descriptor queue 0
4166 * Tx TC1 starts at: descriptor queue 32
4167 * Tx TC2 starts at: descriptor queue 64
4168 * Tx TC3 starts at: descriptor queue 80
4169 * Tx TC4 starts at: descriptor queue 96
4170 * Tx TC5 starts at: descriptor queue 104
4171 * Tx TC6 starts at: descriptor queue 112
4172 * Tx TC7 starts at: descriptor queue 120
4173 *
4174 * Rx TC0-TC7 are offset by 16 queues each
4175 */
4176 for (i = 0; i < 3; i++) {
4177 adapter->tx_ring[i]->reg_idx = i << 5;
4178 adapter->rx_ring[i]->reg_idx = i << 4;
4179 }
4180 for ( ; i < 5; i++) {
4181 adapter->tx_ring[i]->reg_idx =
4182 ((i + 2) << 4);
4183 adapter->rx_ring[i]->reg_idx = i << 4;
4184 }
4185 for ( ; i < dcb_i; i++) {
4186 adapter->tx_ring[i]->reg_idx =
4187 ((i + 8) << 3);
4188 adapter->rx_ring[i]->reg_idx = i << 4;
4189 }
4190
4191 ret = true;
4192 } else if (dcb_i == 4) {
4193 /*
4194 * Tx TC0 starts at: descriptor queue 0
4195 * Tx TC1 starts at: descriptor queue 64
4196 * Tx TC2 starts at: descriptor queue 96
4197 * Tx TC3 starts at: descriptor queue 112
4198 *
4199 * Rx TC0-TC3 are offset by 32 queues each
4200 */
4201 adapter->tx_ring[0]->reg_idx = 0;
4202 adapter->tx_ring[1]->reg_idx = 64;
4203 adapter->tx_ring[2]->reg_idx = 96;
4204 adapter->tx_ring[3]->reg_idx = 112;
4205 for (i = 0 ; i < dcb_i; i++)
4206 adapter->rx_ring[i]->reg_idx = i << 5;
4207
4208 ret = true;
4209 } else {
4210 ret = false;
4211 }
4212 } else {
4213 ret = false;
4214 }
4215 } else {
4216 ret = false;
4217 }
4218
4219 return ret;
4220 }
4221 #endif
4222
4223 /**
4224 * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
4225 * @adapter: board private structure to initialize
4226 *
4227 * Cache the descriptor ring offsets for Flow Director to the assigned rings.
4228 *
4229 **/
4230 static bool inline ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
4231 {
4232 int i;
4233 bool ret = false;
4234
4235 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
4236 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4237 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))) {
4238 for (i = 0; i < adapter->num_rx_queues; i++)
4239 adapter->rx_ring[i]->reg_idx = i;
4240 for (i = 0; i < adapter->num_tx_queues; i++)
4241 adapter->tx_ring[i]->reg_idx = i;
4242 ret = true;
4243 }
4244
4245 return ret;
4246 }
4247
4248 #ifdef IXGBE_FCOE
4249 /**
4250 * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
4251 * @adapter: board private structure to initialize
4252 *
4253 * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
4254 *
4255 */
4256 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
4257 {
4258 int i, fcoe_rx_i = 0, fcoe_tx_i = 0;
4259 bool ret = false;
4260 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4261
4262 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
4263 #ifdef CONFIG_IXGBE_DCB
4264 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4265 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
4266
4267 ixgbe_cache_ring_dcb(adapter);
4268 /* find out queues in TC for FCoE */
4269 fcoe_rx_i = adapter->rx_ring[fcoe->tc]->reg_idx + 1;
4270 fcoe_tx_i = adapter->tx_ring[fcoe->tc]->reg_idx + 1;
4271 /*
4272 * In 82599, the number of Tx queues for each traffic
4273 * class for both 8-TC and 4-TC modes are:
4274 * TCs : TC0 TC1 TC2 TC3 TC4 TC5 TC6 TC7
4275 * 8 TCs: 32 32 16 16 8 8 8 8
4276 * 4 TCs: 64 64 32 32
4277 * We have max 8 queues for FCoE, where 8 the is
4278 * FCoE redirection table size. If TC for FCoE is
4279 * less than or equal to TC3, we have enough queues
4280 * to add max of 8 queues for FCoE, so we start FCoE
4281 * tx descriptor from the next one, i.e., reg_idx + 1.
4282 * If TC for FCoE is above TC3, implying 8 TC mode,
4283 * and we need 8 for FCoE, we have to take all queues
4284 * in that traffic class for FCoE.
4285 */
4286 if ((f->indices == IXGBE_FCRETA_SIZE) && (fcoe->tc > 3))
4287 fcoe_tx_i--;
4288 }
4289 #endif /* CONFIG_IXGBE_DCB */
4290 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4291 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4292 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
4293 ixgbe_cache_ring_fdir(adapter);
4294 else
4295 ixgbe_cache_ring_rss(adapter);
4296
4297 fcoe_rx_i = f->mask;
4298 fcoe_tx_i = f->mask;
4299 }
4300 for (i = 0; i < f->indices; i++, fcoe_rx_i++, fcoe_tx_i++) {
4301 adapter->rx_ring[f->mask + i]->reg_idx = fcoe_rx_i;
4302 adapter->tx_ring[f->mask + i]->reg_idx = fcoe_tx_i;
4303 }
4304 ret = true;
4305 }
4306 return ret;
4307 }
4308
4309 #endif /* IXGBE_FCOE */
4310 /**
4311 * ixgbe_cache_ring_sriov - Descriptor ring to register mapping for sriov
4312 * @adapter: board private structure to initialize
4313 *
4314 * SR-IOV doesn't use any descriptor rings but changes the default if
4315 * no other mapping is used.
4316 *
4317 */
4318 static inline bool ixgbe_cache_ring_sriov(struct ixgbe_adapter *adapter)
4319 {
4320 adapter->rx_ring[0]->reg_idx = adapter->num_vfs * 2;
4321 adapter->tx_ring[0]->reg_idx = adapter->num_vfs * 2;
4322 if (adapter->num_vfs)
4323 return true;
4324 else
4325 return false;
4326 }
4327
4328 /**
4329 * ixgbe_cache_ring_register - Descriptor ring to register mapping
4330 * @adapter: board private structure to initialize
4331 *
4332 * Once we know the feature-set enabled for the device, we'll cache
4333 * the register offset the descriptor ring is assigned to.
4334 *
4335 * Note, the order the various feature calls is important. It must start with
4336 * the "most" features enabled at the same time, then trickle down to the
4337 * least amount of features turned on at once.
4338 **/
4339 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
4340 {
4341 /* start with default case */
4342 adapter->rx_ring[0]->reg_idx = 0;
4343 adapter->tx_ring[0]->reg_idx = 0;
4344
4345 if (ixgbe_cache_ring_sriov(adapter))
4346 return;
4347
4348 #ifdef IXGBE_FCOE
4349 if (ixgbe_cache_ring_fcoe(adapter))
4350 return;
4351
4352 #endif /* IXGBE_FCOE */
4353 #ifdef CONFIG_IXGBE_DCB
4354 if (ixgbe_cache_ring_dcb(adapter))
4355 return;
4356
4357 #endif
4358 if (ixgbe_cache_ring_fdir(adapter))
4359 return;
4360
4361 if (ixgbe_cache_ring_rss(adapter))
4362 return;
4363 }
4364
4365 /**
4366 * ixgbe_alloc_queues - Allocate memory for all rings
4367 * @adapter: board private structure to initialize
4368 *
4369 * We allocate one ring per queue at run-time since we don't know the
4370 * number of queues at compile-time. The polling_netdev array is
4371 * intended for Multiqueue, but should work fine with a single queue.
4372 **/
4373 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
4374 {
4375 int i;
4376 int orig_node = adapter->node;
4377
4378 for (i = 0; i < adapter->num_tx_queues; i++) {
4379 struct ixgbe_ring *ring = adapter->tx_ring[i];
4380 if (orig_node == -1) {
4381 int cur_node = next_online_node(adapter->node);
4382 if (cur_node == MAX_NUMNODES)
4383 cur_node = first_online_node;
4384 adapter->node = cur_node;
4385 }
4386 ring = kzalloc_node(sizeof(struct ixgbe_ring), GFP_KERNEL,
4387 adapter->node);
4388 if (!ring)
4389 ring = kzalloc(sizeof(struct ixgbe_ring), GFP_KERNEL);
4390 if (!ring)
4391 goto err_tx_ring_allocation;
4392 ring->count = adapter->tx_ring_count;
4393 ring->queue_index = i;
4394 ring->numa_node = adapter->node;
4395
4396 adapter->tx_ring[i] = ring;
4397 }
4398
4399 /* Restore the adapter's original node */
4400 adapter->node = orig_node;
4401
4402 for (i = 0; i < adapter->num_rx_queues; i++) {
4403 struct ixgbe_ring *ring = adapter->rx_ring[i];
4404 if (orig_node == -1) {
4405 int cur_node = next_online_node(adapter->node);
4406 if (cur_node == MAX_NUMNODES)
4407 cur_node = first_online_node;
4408 adapter->node = cur_node;
4409 }
4410 ring = kzalloc_node(sizeof(struct ixgbe_ring), GFP_KERNEL,
4411 adapter->node);
4412 if (!ring)
4413 ring = kzalloc(sizeof(struct ixgbe_ring), GFP_KERNEL);
4414 if (!ring)
4415 goto err_rx_ring_allocation;
4416 ring->count = adapter->rx_ring_count;
4417 ring->queue_index = i;
4418 ring->numa_node = adapter->node;
4419
4420 adapter->rx_ring[i] = ring;
4421 }
4422
4423 /* Restore the adapter's original node */
4424 adapter->node = orig_node;
4425
4426 ixgbe_cache_ring_register(adapter);
4427
4428 return 0;
4429
4430 err_rx_ring_allocation:
4431 for (i = 0; i < adapter->num_tx_queues; i++)
4432 kfree(adapter->tx_ring[i]);
4433 err_tx_ring_allocation:
4434 return -ENOMEM;
4435 }
4436
4437 /**
4438 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
4439 * @adapter: board private structure to initialize
4440 *
4441 * Attempt to configure the interrupts using the best available
4442 * capabilities of the hardware and the kernel.
4443 **/
4444 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
4445 {
4446 struct ixgbe_hw *hw = &adapter->hw;
4447 int err = 0;
4448 int vector, v_budget;
4449
4450 /*
4451 * It's easy to be greedy for MSI-X vectors, but it really
4452 * doesn't do us much good if we have a lot more vectors
4453 * than CPU's. So let's be conservative and only ask for
4454 * (roughly) the same number of vectors as there are CPU's.
4455 */
4456 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
4457 (int)num_online_cpus()) + NON_Q_VECTORS;
4458
4459 /*
4460 * At the same time, hardware can only support a maximum of
4461 * hw.mac->max_msix_vectors vectors. With features
4462 * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
4463 * descriptor queues supported by our device. Thus, we cap it off in
4464 * those rare cases where the cpu count also exceeds our vector limit.
4465 */
4466 v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
4467
4468 /* A failure in MSI-X entry allocation isn't fatal, but it does
4469 * mean we disable MSI-X capabilities of the adapter. */
4470 adapter->msix_entries = kcalloc(v_budget,
4471 sizeof(struct msix_entry), GFP_KERNEL);
4472 if (adapter->msix_entries) {
4473 for (vector = 0; vector < v_budget; vector++)
4474 adapter->msix_entries[vector].entry = vector;
4475
4476 ixgbe_acquire_msix_vectors(adapter, v_budget);
4477
4478 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4479 goto out;
4480 }
4481
4482 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
4483 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
4484 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4485 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4486 adapter->atr_sample_rate = 0;
4487 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4488 ixgbe_disable_sriov(adapter);
4489
4490 ixgbe_set_num_queues(adapter);
4491
4492 err = pci_enable_msi(adapter->pdev);
4493 if (!err) {
4494 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
4495 } else {
4496 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4497 "Unable to allocate MSI interrupt, "
4498 "falling back to legacy. Error: %d\n", err);
4499 /* reset err */
4500 err = 0;
4501 }
4502
4503 out:
4504 return err;
4505 }
4506
4507 /**
4508 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
4509 * @adapter: board private structure to initialize
4510 *
4511 * We allocate one q_vector per queue interrupt. If allocation fails we
4512 * return -ENOMEM.
4513 **/
4514 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
4515 {
4516 int q_idx, num_q_vectors;
4517 struct ixgbe_q_vector *q_vector;
4518 int napi_vectors;
4519 int (*poll)(struct napi_struct *, int);
4520
4521 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4522 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4523 napi_vectors = adapter->num_rx_queues;
4524 poll = &ixgbe_clean_rxtx_many;
4525 } else {
4526 num_q_vectors = 1;
4527 napi_vectors = 1;
4528 poll = &ixgbe_poll;
4529 }
4530
4531 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4532 q_vector = kzalloc_node(sizeof(struct ixgbe_q_vector),
4533 GFP_KERNEL, adapter->node);
4534 if (!q_vector)
4535 q_vector = kzalloc(sizeof(struct ixgbe_q_vector),
4536 GFP_KERNEL);
4537 if (!q_vector)
4538 goto err_out;
4539 q_vector->adapter = adapter;
4540 if (q_vector->txr_count && !q_vector->rxr_count)
4541 q_vector->eitr = adapter->tx_eitr_param;
4542 else
4543 q_vector->eitr = adapter->rx_eitr_param;
4544 q_vector->v_idx = q_idx;
4545 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
4546 adapter->q_vector[q_idx] = q_vector;
4547 }
4548
4549 return 0;
4550
4551 err_out:
4552 while (q_idx) {
4553 q_idx--;
4554 q_vector = adapter->q_vector[q_idx];
4555 netif_napi_del(&q_vector->napi);
4556 kfree(q_vector);
4557 adapter->q_vector[q_idx] = NULL;
4558 }
4559 return -ENOMEM;
4560 }
4561
4562 /**
4563 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
4564 * @adapter: board private structure to initialize
4565 *
4566 * This function frees the memory allocated to the q_vectors. In addition if
4567 * NAPI is enabled it will delete any references to the NAPI struct prior
4568 * to freeing the q_vector.
4569 **/
4570 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
4571 {
4572 int q_idx, num_q_vectors;
4573
4574 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4575 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4576 else
4577 num_q_vectors = 1;
4578
4579 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4580 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
4581 adapter->q_vector[q_idx] = NULL;
4582 netif_napi_del(&q_vector->napi);
4583 kfree(q_vector);
4584 }
4585 }
4586
4587 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
4588 {
4589 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4590 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4591 pci_disable_msix(adapter->pdev);
4592 kfree(adapter->msix_entries);
4593 adapter->msix_entries = NULL;
4594 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
4595 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
4596 pci_disable_msi(adapter->pdev);
4597 }
4598 }
4599
4600 /**
4601 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
4602 * @adapter: board private structure to initialize
4603 *
4604 * We determine which interrupt scheme to use based on...
4605 * - Kernel support (MSI, MSI-X)
4606 * - which can be user-defined (via MODULE_PARAM)
4607 * - Hardware queue count (num_*_queues)
4608 * - defined by miscellaneous hardware support/features (RSS, etc.)
4609 **/
4610 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
4611 {
4612 int err;
4613
4614 /* Number of supported queues */
4615 ixgbe_set_num_queues(adapter);
4616
4617 err = ixgbe_set_interrupt_capability(adapter);
4618 if (err) {
4619 e_dev_err("Unable to setup interrupt capabilities\n");
4620 goto err_set_interrupt;
4621 }
4622
4623 err = ixgbe_alloc_q_vectors(adapter);
4624 if (err) {
4625 e_dev_err("Unable to allocate memory for queue vectors\n");
4626 goto err_alloc_q_vectors;
4627 }
4628
4629 err = ixgbe_alloc_queues(adapter);
4630 if (err) {
4631 e_dev_err("Unable to allocate memory for queues\n");
4632 goto err_alloc_queues;
4633 }
4634
4635 e_dev_info("Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u\n",
4636 (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
4637 adapter->num_rx_queues, adapter->num_tx_queues);
4638
4639 set_bit(__IXGBE_DOWN, &adapter->state);
4640
4641 return 0;
4642
4643 err_alloc_queues:
4644 ixgbe_free_q_vectors(adapter);
4645 err_alloc_q_vectors:
4646 ixgbe_reset_interrupt_capability(adapter);
4647 err_set_interrupt:
4648 return err;
4649 }
4650
4651 /**
4652 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
4653 * @adapter: board private structure to clear interrupt scheme on
4654 *
4655 * We go through and clear interrupt specific resources and reset the structure
4656 * to pre-load conditions
4657 **/
4658 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
4659 {
4660 int i;
4661
4662 for (i = 0; i < adapter->num_tx_queues; i++) {
4663 kfree(adapter->tx_ring[i]);
4664 adapter->tx_ring[i] = NULL;
4665 }
4666 for (i = 0; i < adapter->num_rx_queues; i++) {
4667 kfree(adapter->rx_ring[i]);
4668 adapter->rx_ring[i] = NULL;
4669 }
4670
4671 ixgbe_free_q_vectors(adapter);
4672 ixgbe_reset_interrupt_capability(adapter);
4673 }
4674
4675 /**
4676 * ixgbe_sfp_timer - worker thread to find a missing module
4677 * @data: pointer to our adapter struct
4678 **/
4679 static void ixgbe_sfp_timer(unsigned long data)
4680 {
4681 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4682
4683 /*
4684 * Do the sfp_timer outside of interrupt context due to the
4685 * delays that sfp+ detection requires
4686 */
4687 schedule_work(&adapter->sfp_task);
4688 }
4689
4690 /**
4691 * ixgbe_sfp_task - worker thread to find a missing module
4692 * @work: pointer to work_struct containing our data
4693 **/
4694 static void ixgbe_sfp_task(struct work_struct *work)
4695 {
4696 struct ixgbe_adapter *adapter = container_of(work,
4697 struct ixgbe_adapter,
4698 sfp_task);
4699 struct ixgbe_hw *hw = &adapter->hw;
4700
4701 if ((hw->phy.type == ixgbe_phy_nl) &&
4702 (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
4703 s32 ret = hw->phy.ops.identify_sfp(hw);
4704 if (ret == IXGBE_ERR_SFP_NOT_PRESENT)
4705 goto reschedule;
4706 ret = hw->phy.ops.reset(hw);
4707 if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
4708 e_dev_err("failed to initialize because an unsupported "
4709 "SFP+ module type was detected.\n");
4710 e_dev_err("Reload the driver after installing a "
4711 "supported module.\n");
4712 unregister_netdev(adapter->netdev);
4713 } else {
4714 e_info("detected SFP+: %d\n", hw->phy.sfp_type);
4715 }
4716 /* don't need this routine any more */
4717 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
4718 }
4719 return;
4720 reschedule:
4721 if (test_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state))
4722 mod_timer(&adapter->sfp_timer,
4723 round_jiffies(jiffies + (2 * HZ)));
4724 }
4725
4726 /**
4727 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
4728 * @adapter: board private structure to initialize
4729 *
4730 * ixgbe_sw_init initializes the Adapter private data structure.
4731 * Fields are initialized based on PCI device information and
4732 * OS network device settings (MTU size).
4733 **/
4734 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
4735 {
4736 struct ixgbe_hw *hw = &adapter->hw;
4737 struct pci_dev *pdev = adapter->pdev;
4738 struct net_device *dev = adapter->netdev;
4739 unsigned int rss;
4740 #ifdef CONFIG_IXGBE_DCB
4741 int j;
4742 struct tc_configuration *tc;
4743 #endif
4744
4745 /* PCI config space info */
4746
4747 hw->vendor_id = pdev->vendor;
4748 hw->device_id = pdev->device;
4749 hw->revision_id = pdev->revision;
4750 hw->subsystem_vendor_id = pdev->subsystem_vendor;
4751 hw->subsystem_device_id = pdev->subsystem_device;
4752
4753 /* Set capability flags */
4754 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
4755 adapter->ring_feature[RING_F_RSS].indices = rss;
4756 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
4757 adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
4758 if (hw->mac.type == ixgbe_mac_82598EB) {
4759 if (hw->device_id == IXGBE_DEV_ID_82598AT)
4760 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
4761 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
4762 } else if (hw->mac.type == ixgbe_mac_82599EB) {
4763 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
4764 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
4765 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
4766 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
4767 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
4768 if (dev->features & NETIF_F_NTUPLE) {
4769 /* Flow Director perfect filter enabled */
4770 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4771 adapter->atr_sample_rate = 0;
4772 spin_lock_init(&adapter->fdir_perfect_lock);
4773 } else {
4774 /* Flow Director hash filters enabled */
4775 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
4776 adapter->atr_sample_rate = 20;
4777 }
4778 adapter->ring_feature[RING_F_FDIR].indices =
4779 IXGBE_MAX_FDIR_INDICES;
4780 adapter->fdir_pballoc = 0;
4781 #ifdef IXGBE_FCOE
4782 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
4783 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
4784 adapter->ring_feature[RING_F_FCOE].indices = 0;
4785 #ifdef CONFIG_IXGBE_DCB
4786 /* Default traffic class to use for FCoE */
4787 adapter->fcoe.tc = IXGBE_FCOE_DEFTC;
4788 #endif
4789 #endif /* IXGBE_FCOE */
4790 }
4791
4792 #ifdef CONFIG_IXGBE_DCB
4793 /* Configure DCB traffic classes */
4794 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
4795 tc = &adapter->dcb_cfg.tc_config[j];
4796 tc->path[DCB_TX_CONFIG].bwg_id = 0;
4797 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
4798 tc->path[DCB_RX_CONFIG].bwg_id = 0;
4799 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
4800 tc->dcb_pfc = pfc_disabled;
4801 }
4802 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
4803 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
4804 adapter->dcb_cfg.rx_pba_cfg = pba_equal;
4805 adapter->dcb_cfg.pfc_mode_enable = false;
4806 adapter->dcb_cfg.round_robin_enable = false;
4807 adapter->dcb_set_bitmap = 0x00;
4808 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
4809 adapter->ring_feature[RING_F_DCB].indices);
4810
4811 #endif
4812
4813 /* default flow control settings */
4814 hw->fc.requested_mode = ixgbe_fc_full;
4815 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
4816 #ifdef CONFIG_DCB
4817 adapter->last_lfc_mode = hw->fc.current_mode;
4818 #endif
4819 hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
4820 hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
4821 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
4822 hw->fc.send_xon = true;
4823 hw->fc.disable_fc_autoneg = false;
4824
4825 /* enable itr by default in dynamic mode */
4826 adapter->rx_itr_setting = 1;
4827 adapter->rx_eitr_param = 20000;
4828 adapter->tx_itr_setting = 1;
4829 adapter->tx_eitr_param = 10000;
4830
4831 /* set defaults for eitr in MegaBytes */
4832 adapter->eitr_low = 10;
4833 adapter->eitr_high = 20;
4834
4835 /* set default ring sizes */
4836 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
4837 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
4838
4839 /* initialize eeprom parameters */
4840 if (ixgbe_init_eeprom_params_generic(hw)) {
4841 e_dev_err("EEPROM initialization failed\n");
4842 return -EIO;
4843 }
4844
4845 /* enable rx csum by default */
4846 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
4847
4848 /* get assigned NUMA node */
4849 adapter->node = dev_to_node(&pdev->dev);
4850
4851 set_bit(__IXGBE_DOWN, &adapter->state);
4852
4853 return 0;
4854 }
4855
4856 /**
4857 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
4858 * @adapter: board private structure
4859 * @tx_ring: tx descriptor ring (for a specific queue) to setup
4860 *
4861 * Return 0 on success, negative on failure
4862 **/
4863 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
4864 struct ixgbe_ring *tx_ring)
4865 {
4866 struct pci_dev *pdev = adapter->pdev;
4867 int size;
4868
4869 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
4870 tx_ring->tx_buffer_info = vmalloc_node(size, tx_ring->numa_node);
4871 if (!tx_ring->tx_buffer_info)
4872 tx_ring->tx_buffer_info = vmalloc(size);
4873 if (!tx_ring->tx_buffer_info)
4874 goto err;
4875 memset(tx_ring->tx_buffer_info, 0, size);
4876
4877 /* round up to nearest 4K */
4878 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
4879 tx_ring->size = ALIGN(tx_ring->size, 4096);
4880
4881 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
4882 &tx_ring->dma, GFP_KERNEL);
4883 if (!tx_ring->desc)
4884 goto err;
4885
4886 tx_ring->next_to_use = 0;
4887 tx_ring->next_to_clean = 0;
4888 tx_ring->work_limit = tx_ring->count;
4889 return 0;
4890
4891 err:
4892 vfree(tx_ring->tx_buffer_info);
4893 tx_ring->tx_buffer_info = NULL;
4894 e_err("Unable to allocate memory for the Tx descriptor ring\n");
4895 return -ENOMEM;
4896 }
4897
4898 /**
4899 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
4900 * @adapter: board private structure
4901 *
4902 * If this function returns with an error, then it's possible one or
4903 * more of the rings is populated (while the rest are not). It is the
4904 * callers duty to clean those orphaned rings.
4905 *
4906 * Return 0 on success, negative on failure
4907 **/
4908 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
4909 {
4910 int i, err = 0;
4911
4912 for (i = 0; i < adapter->num_tx_queues; i++) {
4913 err = ixgbe_setup_tx_resources(adapter, adapter->tx_ring[i]);
4914 if (!err)
4915 continue;
4916 e_err("Allocation for Tx Queue %u failed\n", i);
4917 break;
4918 }
4919
4920 return err;
4921 }
4922
4923 /**
4924 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
4925 * @adapter: board private structure
4926 * @rx_ring: rx descriptor ring (for a specific queue) to setup
4927 *
4928 * Returns 0 on success, negative on failure
4929 **/
4930 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
4931 struct ixgbe_ring *rx_ring)
4932 {
4933 struct pci_dev *pdev = adapter->pdev;
4934 int size;
4935
4936 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4937 rx_ring->rx_buffer_info = vmalloc_node(size, adapter->node);
4938 if (!rx_ring->rx_buffer_info)
4939 rx_ring->rx_buffer_info = vmalloc(size);
4940 if (!rx_ring->rx_buffer_info) {
4941 e_err("vmalloc allocation failed for the Rx desc ring\n");
4942 goto alloc_failed;
4943 }
4944 memset(rx_ring->rx_buffer_info, 0, size);
4945
4946 /* Round up to nearest 4K */
4947 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
4948 rx_ring->size = ALIGN(rx_ring->size, 4096);
4949
4950 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
4951 &rx_ring->dma, GFP_KERNEL);
4952
4953 if (!rx_ring->desc) {
4954 e_err("Memory allocation failed for the Rx desc ring\n");
4955 vfree(rx_ring->rx_buffer_info);
4956 goto alloc_failed;
4957 }
4958
4959 rx_ring->next_to_clean = 0;
4960 rx_ring->next_to_use = 0;
4961
4962 return 0;
4963
4964 alloc_failed:
4965 return -ENOMEM;
4966 }
4967
4968 /**
4969 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
4970 * @adapter: board private structure
4971 *
4972 * If this function returns with an error, then it's possible one or
4973 * more of the rings is populated (while the rest are not). It is the
4974 * callers duty to clean those orphaned rings.
4975 *
4976 * Return 0 on success, negative on failure
4977 **/
4978
4979 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
4980 {
4981 int i, err = 0;
4982
4983 for (i = 0; i < adapter->num_rx_queues; i++) {
4984 err = ixgbe_setup_rx_resources(adapter, adapter->rx_ring[i]);
4985 if (!err)
4986 continue;
4987 e_err("Allocation for Rx Queue %u failed\n", i);
4988 break;
4989 }
4990
4991 return err;
4992 }
4993
4994 /**
4995 * ixgbe_free_tx_resources - Free Tx Resources per Queue
4996 * @adapter: board private structure
4997 * @tx_ring: Tx descriptor ring for a specific queue
4998 *
4999 * Free all transmit software resources
5000 **/
5001 void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
5002 struct ixgbe_ring *tx_ring)
5003 {
5004 struct pci_dev *pdev = adapter->pdev;
5005
5006 ixgbe_clean_tx_ring(adapter, tx_ring);
5007
5008 vfree(tx_ring->tx_buffer_info);
5009 tx_ring->tx_buffer_info = NULL;
5010
5011 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
5012 tx_ring->dma);
5013
5014 tx_ring->desc = NULL;
5015 }
5016
5017 /**
5018 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
5019 * @adapter: board private structure
5020 *
5021 * Free all transmit software resources
5022 **/
5023 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
5024 {
5025 int i;
5026
5027 for (i = 0; i < adapter->num_tx_queues; i++)
5028 if (adapter->tx_ring[i]->desc)
5029 ixgbe_free_tx_resources(adapter, adapter->tx_ring[i]);
5030 }
5031
5032 /**
5033 * ixgbe_free_rx_resources - Free Rx Resources
5034 * @adapter: board private structure
5035 * @rx_ring: ring to clean the resources from
5036 *
5037 * Free all receive software resources
5038 **/
5039 void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
5040 struct ixgbe_ring *rx_ring)
5041 {
5042 struct pci_dev *pdev = adapter->pdev;
5043
5044 ixgbe_clean_rx_ring(adapter, rx_ring);
5045
5046 vfree(rx_ring->rx_buffer_info);
5047 rx_ring->rx_buffer_info = NULL;
5048
5049 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
5050 rx_ring->dma);
5051
5052 rx_ring->desc = NULL;
5053 }
5054
5055 /**
5056 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
5057 * @adapter: board private structure
5058 *
5059 * Free all receive software resources
5060 **/
5061 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
5062 {
5063 int i;
5064
5065 for (i = 0; i < adapter->num_rx_queues; i++)
5066 if (adapter->rx_ring[i]->desc)
5067 ixgbe_free_rx_resources(adapter, adapter->rx_ring[i]);
5068 }
5069
5070 /**
5071 * ixgbe_change_mtu - Change the Maximum Transfer Unit
5072 * @netdev: network interface device structure
5073 * @new_mtu: new value for maximum frame size
5074 *
5075 * Returns 0 on success, negative on failure
5076 **/
5077 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
5078 {
5079 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5080 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5081
5082 /* MTU < 68 is an error and causes problems on some kernels */
5083 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
5084 return -EINVAL;
5085
5086 e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5087 /* must set new MTU before calling down or up */
5088 netdev->mtu = new_mtu;
5089
5090 if (netif_running(netdev))
5091 ixgbe_reinit_locked(adapter);
5092
5093 return 0;
5094 }
5095
5096 /**
5097 * ixgbe_open - Called when a network interface is made active
5098 * @netdev: network interface device structure
5099 *
5100 * Returns 0 on success, negative value on failure
5101 *
5102 * The open entry point is called when a network interface is made
5103 * active by the system (IFF_UP). At this point all resources needed
5104 * for transmit and receive operations are allocated, the interrupt
5105 * handler is registered with the OS, the watchdog timer is started,
5106 * and the stack is notified that the interface is ready.
5107 **/
5108 static int ixgbe_open(struct net_device *netdev)
5109 {
5110 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5111 int err;
5112
5113 /* disallow open during test */
5114 if (test_bit(__IXGBE_TESTING, &adapter->state))
5115 return -EBUSY;
5116
5117 netif_carrier_off(netdev);
5118
5119 /* allocate transmit descriptors */
5120 err = ixgbe_setup_all_tx_resources(adapter);
5121 if (err)
5122 goto err_setup_tx;
5123
5124 /* allocate receive descriptors */
5125 err = ixgbe_setup_all_rx_resources(adapter);
5126 if (err)
5127 goto err_setup_rx;
5128
5129 ixgbe_configure(adapter);
5130
5131 err = ixgbe_request_irq(adapter);
5132 if (err)
5133 goto err_req_irq;
5134
5135 err = ixgbe_up_complete(adapter);
5136 if (err)
5137 goto err_up;
5138
5139 netif_tx_start_all_queues(netdev);
5140
5141 return 0;
5142
5143 err_up:
5144 ixgbe_release_hw_control(adapter);
5145 ixgbe_free_irq(adapter);
5146 err_req_irq:
5147 err_setup_rx:
5148 ixgbe_free_all_rx_resources(adapter);
5149 err_setup_tx:
5150 ixgbe_free_all_tx_resources(adapter);
5151 ixgbe_reset(adapter);
5152
5153 return err;
5154 }
5155
5156 /**
5157 * ixgbe_close - Disables a network interface
5158 * @netdev: network interface device structure
5159 *
5160 * Returns 0, this is not allowed to fail
5161 *
5162 * The close entry point is called when an interface is de-activated
5163 * by the OS. The hardware is still under the drivers control, but
5164 * needs to be disabled. A global MAC reset is issued to stop the
5165 * hardware, and all transmit and receive resources are freed.
5166 **/
5167 static int ixgbe_close(struct net_device *netdev)
5168 {
5169 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5170
5171 ixgbe_down(adapter);
5172 ixgbe_free_irq(adapter);
5173
5174 ixgbe_free_all_tx_resources(adapter);
5175 ixgbe_free_all_rx_resources(adapter);
5176
5177 ixgbe_release_hw_control(adapter);
5178
5179 return 0;
5180 }
5181
5182 #ifdef CONFIG_PM
5183 static int ixgbe_resume(struct pci_dev *pdev)
5184 {
5185 struct net_device *netdev = pci_get_drvdata(pdev);
5186 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5187 u32 err;
5188
5189 pci_set_power_state(pdev, PCI_D0);
5190 pci_restore_state(pdev);
5191 /*
5192 * pci_restore_state clears dev->state_saved so call
5193 * pci_save_state to restore it.
5194 */
5195 pci_save_state(pdev);
5196
5197 err = pci_enable_device_mem(pdev);
5198 if (err) {
5199 e_dev_err("Cannot enable PCI device from suspend\n");
5200 return err;
5201 }
5202 pci_set_master(pdev);
5203
5204 pci_wake_from_d3(pdev, false);
5205
5206 err = ixgbe_init_interrupt_scheme(adapter);
5207 if (err) {
5208 e_dev_err("Cannot initialize interrupts for device\n");
5209 return err;
5210 }
5211
5212 ixgbe_reset(adapter);
5213
5214 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5215
5216 if (netif_running(netdev)) {
5217 err = ixgbe_open(adapter->netdev);
5218 if (err)
5219 return err;
5220 }
5221
5222 netif_device_attach(netdev);
5223
5224 return 0;
5225 }
5226 #endif /* CONFIG_PM */
5227
5228 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
5229 {
5230 struct net_device *netdev = pci_get_drvdata(pdev);
5231 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5232 struct ixgbe_hw *hw = &adapter->hw;
5233 u32 ctrl, fctrl;
5234 u32 wufc = adapter->wol;
5235 #ifdef CONFIG_PM
5236 int retval = 0;
5237 #endif
5238
5239 netif_device_detach(netdev);
5240
5241 if (netif_running(netdev)) {
5242 ixgbe_down(adapter);
5243 ixgbe_free_irq(adapter);
5244 ixgbe_free_all_tx_resources(adapter);
5245 ixgbe_free_all_rx_resources(adapter);
5246 }
5247 ixgbe_clear_interrupt_scheme(adapter);
5248
5249 #ifdef CONFIG_PM
5250 retval = pci_save_state(pdev);
5251 if (retval)
5252 return retval;
5253
5254 #endif
5255 if (wufc) {
5256 ixgbe_set_rx_mode(netdev);
5257
5258 /* turn on all-multi mode if wake on multicast is enabled */
5259 if (wufc & IXGBE_WUFC_MC) {
5260 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5261 fctrl |= IXGBE_FCTRL_MPE;
5262 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
5263 }
5264
5265 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
5266 ctrl |= IXGBE_CTRL_GIO_DIS;
5267 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
5268
5269 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
5270 } else {
5271 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
5272 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
5273 }
5274
5275 if (wufc && hw->mac.type == ixgbe_mac_82599EB)
5276 pci_wake_from_d3(pdev, true);
5277 else
5278 pci_wake_from_d3(pdev, false);
5279
5280 *enable_wake = !!wufc;
5281
5282 ixgbe_release_hw_control(adapter);
5283
5284 pci_disable_device(pdev);
5285
5286 return 0;
5287 }
5288
5289 #ifdef CONFIG_PM
5290 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
5291 {
5292 int retval;
5293 bool wake;
5294
5295 retval = __ixgbe_shutdown(pdev, &wake);
5296 if (retval)
5297 return retval;
5298
5299 if (wake) {
5300 pci_prepare_to_sleep(pdev);
5301 } else {
5302 pci_wake_from_d3(pdev, false);
5303 pci_set_power_state(pdev, PCI_D3hot);
5304 }
5305
5306 return 0;
5307 }
5308 #endif /* CONFIG_PM */
5309
5310 static void ixgbe_shutdown(struct pci_dev *pdev)
5311 {
5312 bool wake;
5313
5314 __ixgbe_shutdown(pdev, &wake);
5315
5316 if (system_state == SYSTEM_POWER_OFF) {
5317 pci_wake_from_d3(pdev, wake);
5318 pci_set_power_state(pdev, PCI_D3hot);
5319 }
5320 }
5321
5322 /**
5323 * ixgbe_update_stats - Update the board statistics counters.
5324 * @adapter: board private structure
5325 **/
5326 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
5327 {
5328 struct net_device *netdev = adapter->netdev;
5329 struct ixgbe_hw *hw = &adapter->hw;
5330 u64 total_mpc = 0;
5331 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
5332 u64 non_eop_descs = 0, restart_queue = 0;
5333
5334 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5335 test_bit(__IXGBE_RESETTING, &adapter->state))
5336 return;
5337
5338 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
5339 u64 rsc_count = 0;
5340 u64 rsc_flush = 0;
5341 for (i = 0; i < 16; i++)
5342 adapter->hw_rx_no_dma_resources +=
5343 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5344 for (i = 0; i < adapter->num_rx_queues; i++) {
5345 rsc_count += adapter->rx_ring[i]->rsc_count;
5346 rsc_flush += adapter->rx_ring[i]->rsc_flush;
5347 }
5348 adapter->rsc_total_count = rsc_count;
5349 adapter->rsc_total_flush = rsc_flush;
5350 }
5351
5352 /* gather some stats to the adapter struct that are per queue */
5353 for (i = 0; i < adapter->num_tx_queues; i++)
5354 restart_queue += adapter->tx_ring[i]->restart_queue;
5355 adapter->restart_queue = restart_queue;
5356
5357 for (i = 0; i < adapter->num_rx_queues; i++)
5358 non_eop_descs += adapter->rx_ring[i]->non_eop_descs;
5359 adapter->non_eop_descs = non_eop_descs;
5360
5361 adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
5362 for (i = 0; i < 8; i++) {
5363 /* for packet buffers not used, the register should read 0 */
5364 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
5365 missed_rx += mpc;
5366 adapter->stats.mpc[i] += mpc;
5367 total_mpc += adapter->stats.mpc[i];
5368 if (hw->mac.type == ixgbe_mac_82598EB)
5369 adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
5370 adapter->stats.qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
5371 adapter->stats.qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
5372 adapter->stats.qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
5373 adapter->stats.qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
5374 if (hw->mac.type == ixgbe_mac_82599EB) {
5375 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
5376 IXGBE_PXONRXCNT(i));
5377 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
5378 IXGBE_PXOFFRXCNT(i));
5379 adapter->stats.qprdc[i] += IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5380 } else {
5381 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
5382 IXGBE_PXONRXC(i));
5383 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
5384 IXGBE_PXOFFRXC(i));
5385 }
5386 adapter->stats.pxontxc[i] += IXGBE_READ_REG(hw,
5387 IXGBE_PXONTXC(i));
5388 adapter->stats.pxofftxc[i] += IXGBE_READ_REG(hw,
5389 IXGBE_PXOFFTXC(i));
5390 }
5391 adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
5392 /* work around hardware counting issue */
5393 adapter->stats.gprc -= missed_rx;
5394
5395 /* 82598 hardware only has a 32 bit counter in the high register */
5396 if (hw->mac.type == ixgbe_mac_82599EB) {
5397 u64 tmp;
5398 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
5399 tmp = IXGBE_READ_REG(hw, IXGBE_GORCH) & 0xF; /* 4 high bits of GORC */
5400 adapter->stats.gorc += (tmp << 32);
5401 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
5402 tmp = IXGBE_READ_REG(hw, IXGBE_GOTCH) & 0xF; /* 4 high bits of GOTC */
5403 adapter->stats.gotc += (tmp << 32);
5404 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORL);
5405 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
5406 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
5407 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
5408 adapter->stats.fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
5409 adapter->stats.fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
5410 #ifdef IXGBE_FCOE
5411 adapter->stats.fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
5412 adapter->stats.fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
5413 adapter->stats.fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
5414 adapter->stats.fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
5415 adapter->stats.fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
5416 adapter->stats.fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
5417 #endif /* IXGBE_FCOE */
5418 } else {
5419 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
5420 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
5421 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
5422 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
5423 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
5424 }
5425 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
5426 adapter->stats.bprc += bprc;
5427 adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
5428 if (hw->mac.type == ixgbe_mac_82598EB)
5429 adapter->stats.mprc -= bprc;
5430 adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
5431 adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
5432 adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
5433 adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
5434 adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
5435 adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
5436 adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
5437 adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
5438 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
5439 adapter->stats.lxontxc += lxon;
5440 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
5441 adapter->stats.lxofftxc += lxoff;
5442 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5443 adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
5444 adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
5445 /*
5446 * 82598 errata - tx of flow control packets is included in tx counters
5447 */
5448 xon_off_tot = lxon + lxoff;
5449 adapter->stats.gptc -= xon_off_tot;
5450 adapter->stats.mptc -= xon_off_tot;
5451 adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
5452 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5453 adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
5454 adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
5455 adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
5456 adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
5457 adapter->stats.ptc64 -= xon_off_tot;
5458 adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
5459 adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
5460 adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
5461 adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
5462 adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
5463 adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
5464
5465 /* Fill out the OS statistics structure */
5466 netdev->stats.multicast = adapter->stats.mprc;
5467
5468 /* Rx Errors */
5469 netdev->stats.rx_errors = adapter->stats.crcerrs +
5470 adapter->stats.rlec;
5471 netdev->stats.rx_dropped = 0;
5472 netdev->stats.rx_length_errors = adapter->stats.rlec;
5473 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
5474 netdev->stats.rx_missed_errors = total_mpc;
5475 }
5476
5477 /**
5478 * ixgbe_watchdog - Timer Call-back
5479 * @data: pointer to adapter cast into an unsigned long
5480 **/
5481 static void ixgbe_watchdog(unsigned long data)
5482 {
5483 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
5484 struct ixgbe_hw *hw = &adapter->hw;
5485 u64 eics = 0;
5486 int i;
5487
5488 /*
5489 * Do the watchdog outside of interrupt context due to the lovely
5490 * delays that some of the newer hardware requires
5491 */
5492
5493 if (test_bit(__IXGBE_DOWN, &adapter->state))
5494 goto watchdog_short_circuit;
5495
5496 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
5497 /*
5498 * for legacy and MSI interrupts don't set any bits
5499 * that are enabled for EIAM, because this operation
5500 * would set *both* EIMS and EICS for any bit in EIAM
5501 */
5502 IXGBE_WRITE_REG(hw, IXGBE_EICS,
5503 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
5504 goto watchdog_reschedule;
5505 }
5506
5507 /* get one bit for every active tx/rx interrupt vector */
5508 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
5509 struct ixgbe_q_vector *qv = adapter->q_vector[i];
5510 if (qv->rxr_count || qv->txr_count)
5511 eics |= ((u64)1 << i);
5512 }
5513
5514 /* Cause software interrupt to ensure rx rings are cleaned */
5515 ixgbe_irq_rearm_queues(adapter, eics);
5516
5517 watchdog_reschedule:
5518 /* Reset the timer */
5519 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
5520
5521 watchdog_short_circuit:
5522 schedule_work(&adapter->watchdog_task);
5523 }
5524
5525 /**
5526 * ixgbe_multispeed_fiber_task - worker thread to configure multispeed fiber
5527 * @work: pointer to work_struct containing our data
5528 **/
5529 static void ixgbe_multispeed_fiber_task(struct work_struct *work)
5530 {
5531 struct ixgbe_adapter *adapter = container_of(work,
5532 struct ixgbe_adapter,
5533 multispeed_fiber_task);
5534 struct ixgbe_hw *hw = &adapter->hw;
5535 u32 autoneg;
5536 bool negotiation;
5537
5538 adapter->flags |= IXGBE_FLAG_IN_SFP_LINK_TASK;
5539 autoneg = hw->phy.autoneg_advertised;
5540 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
5541 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
5542 hw->mac.autotry_restart = false;
5543 if (hw->mac.ops.setup_link)
5544 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
5545 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
5546 adapter->flags &= ~IXGBE_FLAG_IN_SFP_LINK_TASK;
5547 }
5548
5549 /**
5550 * ixgbe_sfp_config_module_task - worker thread to configure a new SFP+ module
5551 * @work: pointer to work_struct containing our data
5552 **/
5553 static void ixgbe_sfp_config_module_task(struct work_struct *work)
5554 {
5555 struct ixgbe_adapter *adapter = container_of(work,
5556 struct ixgbe_adapter,
5557 sfp_config_module_task);
5558 struct ixgbe_hw *hw = &adapter->hw;
5559 u32 err;
5560
5561 adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
5562
5563 /* Time for electrical oscillations to settle down */
5564 msleep(100);
5565 err = hw->phy.ops.identify_sfp(hw);
5566
5567 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5568 e_dev_err("failed to initialize because an unsupported SFP+ "
5569 "module type was detected.\n");
5570 e_dev_err("Reload the driver after installing a supported "
5571 "module.\n");
5572 unregister_netdev(adapter->netdev);
5573 return;
5574 }
5575 hw->mac.ops.setup_sfp(hw);
5576
5577 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
5578 /* This will also work for DA Twinax connections */
5579 schedule_work(&adapter->multispeed_fiber_task);
5580 adapter->flags &= ~IXGBE_FLAG_IN_SFP_MOD_TASK;
5581 }
5582
5583 /**
5584 * ixgbe_fdir_reinit_task - worker thread to reinit FDIR filter table
5585 * @work: pointer to work_struct containing our data
5586 **/
5587 static void ixgbe_fdir_reinit_task(struct work_struct *work)
5588 {
5589 struct ixgbe_adapter *adapter = container_of(work,
5590 struct ixgbe_adapter,
5591 fdir_reinit_task);
5592 struct ixgbe_hw *hw = &adapter->hw;
5593 int i;
5594
5595 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
5596 for (i = 0; i < adapter->num_tx_queues; i++)
5597 set_bit(__IXGBE_FDIR_INIT_DONE,
5598 &(adapter->tx_ring[i]->reinit_state));
5599 } else {
5600 e_err("failed to finish FDIR re-initialization, "
5601 "ignored adding FDIR ATR filters\n");
5602 }
5603 /* Done FDIR Re-initialization, enable transmits */
5604 netif_tx_start_all_queues(adapter->netdev);
5605 }
5606
5607 static DEFINE_MUTEX(ixgbe_watchdog_lock);
5608
5609 /**
5610 * ixgbe_watchdog_task - worker thread to bring link up
5611 * @work: pointer to work_struct containing our data
5612 **/
5613 static void ixgbe_watchdog_task(struct work_struct *work)
5614 {
5615 struct ixgbe_adapter *adapter = container_of(work,
5616 struct ixgbe_adapter,
5617 watchdog_task);
5618 struct net_device *netdev = adapter->netdev;
5619 struct ixgbe_hw *hw = &adapter->hw;
5620 u32 link_speed;
5621 bool link_up;
5622 int i;
5623 struct ixgbe_ring *tx_ring;
5624 int some_tx_pending = 0;
5625
5626 mutex_lock(&ixgbe_watchdog_lock);
5627
5628 link_up = adapter->link_up;
5629 link_speed = adapter->link_speed;
5630
5631 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
5632 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
5633 if (link_up) {
5634 #ifdef CONFIG_DCB
5635 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5636 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
5637 hw->mac.ops.fc_enable(hw, i);
5638 } else {
5639 hw->mac.ops.fc_enable(hw, 0);
5640 }
5641 #else
5642 hw->mac.ops.fc_enable(hw, 0);
5643 #endif
5644 }
5645
5646 if (link_up ||
5647 time_after(jiffies, (adapter->link_check_timeout +
5648 IXGBE_TRY_LINK_TIMEOUT))) {
5649 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5650 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
5651 }
5652 adapter->link_up = link_up;
5653 adapter->link_speed = link_speed;
5654 }
5655
5656 if (link_up) {
5657 if (!netif_carrier_ok(netdev)) {
5658 bool flow_rx, flow_tx;
5659
5660 if (hw->mac.type == ixgbe_mac_82599EB) {
5661 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
5662 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
5663 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
5664 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
5665 } else {
5666 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5667 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
5668 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
5669 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
5670 }
5671
5672 e_info("NIC Link is Up %s, Flow Control: %s\n",
5673 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
5674 "10 Gbps" :
5675 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
5676 "1 Gbps" : "unknown speed")),
5677 ((flow_rx && flow_tx) ? "RX/TX" :
5678 (flow_rx ? "RX" :
5679 (flow_tx ? "TX" : "None"))));
5680
5681 netif_carrier_on(netdev);
5682 } else {
5683 /* Force detection of hung controller */
5684 adapter->detect_tx_hung = true;
5685 }
5686 } else {
5687 adapter->link_up = false;
5688 adapter->link_speed = 0;
5689 if (netif_carrier_ok(netdev)) {
5690 e_info("NIC Link is Down\n");
5691 netif_carrier_off(netdev);
5692 }
5693 }
5694
5695 if (!netif_carrier_ok(netdev)) {
5696 for (i = 0; i < adapter->num_tx_queues; i++) {
5697 tx_ring = adapter->tx_ring[i];
5698 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
5699 some_tx_pending = 1;
5700 break;
5701 }
5702 }
5703
5704 if (some_tx_pending) {
5705 /* We've lost link, so the controller stops DMA,
5706 * but we've got queued Tx work that's never going
5707 * to get done, so reset controller to flush Tx.
5708 * (Do the reset outside of interrupt context).
5709 */
5710 schedule_work(&adapter->reset_task);
5711 }
5712 }
5713
5714 ixgbe_update_stats(adapter);
5715 mutex_unlock(&ixgbe_watchdog_lock);
5716 }
5717
5718 static int ixgbe_tso(struct ixgbe_adapter *adapter,
5719 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
5720 u32 tx_flags, u8 *hdr_len)
5721 {
5722 struct ixgbe_adv_tx_context_desc *context_desc;
5723 unsigned int i;
5724 int err;
5725 struct ixgbe_tx_buffer *tx_buffer_info;
5726 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
5727 u32 mss_l4len_idx, l4len;
5728
5729 if (skb_is_gso(skb)) {
5730 if (skb_header_cloned(skb)) {
5731 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
5732 if (err)
5733 return err;
5734 }
5735 l4len = tcp_hdrlen(skb);
5736 *hdr_len += l4len;
5737
5738 if (skb->protocol == htons(ETH_P_IP)) {
5739 struct iphdr *iph = ip_hdr(skb);
5740 iph->tot_len = 0;
5741 iph->check = 0;
5742 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
5743 iph->daddr, 0,
5744 IPPROTO_TCP,
5745 0);
5746 } else if (skb_is_gso_v6(skb)) {
5747 ipv6_hdr(skb)->payload_len = 0;
5748 tcp_hdr(skb)->check =
5749 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
5750 &ipv6_hdr(skb)->daddr,
5751 0, IPPROTO_TCP, 0);
5752 }
5753
5754 i = tx_ring->next_to_use;
5755
5756 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5757 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
5758
5759 /* VLAN MACLEN IPLEN */
5760 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5761 vlan_macip_lens |=
5762 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
5763 vlan_macip_lens |= ((skb_network_offset(skb)) <<
5764 IXGBE_ADVTXD_MACLEN_SHIFT);
5765 *hdr_len += skb_network_offset(skb);
5766 vlan_macip_lens |=
5767 (skb_transport_header(skb) - skb_network_header(skb));
5768 *hdr_len +=
5769 (skb_transport_header(skb) - skb_network_header(skb));
5770 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
5771 context_desc->seqnum_seed = 0;
5772
5773 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
5774 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
5775 IXGBE_ADVTXD_DTYP_CTXT);
5776
5777 if (skb->protocol == htons(ETH_P_IP))
5778 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
5779 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
5780 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
5781
5782 /* MSS L4LEN IDX */
5783 mss_l4len_idx =
5784 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
5785 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
5786 /* use index 1 for TSO */
5787 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
5788 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
5789
5790 tx_buffer_info->time_stamp = jiffies;
5791 tx_buffer_info->next_to_watch = i;
5792
5793 i++;
5794 if (i == tx_ring->count)
5795 i = 0;
5796 tx_ring->next_to_use = i;
5797
5798 return true;
5799 }
5800 return false;
5801 }
5802
5803 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
5804 struct ixgbe_ring *tx_ring,
5805 struct sk_buff *skb, u32 tx_flags)
5806 {
5807 struct ixgbe_adv_tx_context_desc *context_desc;
5808 unsigned int i;
5809 struct ixgbe_tx_buffer *tx_buffer_info;
5810 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
5811
5812 if (skb->ip_summed == CHECKSUM_PARTIAL ||
5813 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
5814 i = tx_ring->next_to_use;
5815 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5816 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
5817
5818 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5819 vlan_macip_lens |=
5820 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
5821 vlan_macip_lens |= (skb_network_offset(skb) <<
5822 IXGBE_ADVTXD_MACLEN_SHIFT);
5823 if (skb->ip_summed == CHECKSUM_PARTIAL)
5824 vlan_macip_lens |= (skb_transport_header(skb) -
5825 skb_network_header(skb));
5826
5827 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
5828 context_desc->seqnum_seed = 0;
5829
5830 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
5831 IXGBE_ADVTXD_DTYP_CTXT);
5832
5833 if (skb->ip_summed == CHECKSUM_PARTIAL) {
5834 __be16 protocol;
5835
5836 if (skb->protocol == cpu_to_be16(ETH_P_8021Q)) {
5837 const struct vlan_ethhdr *vhdr =
5838 (const struct vlan_ethhdr *)skb->data;
5839
5840 protocol = vhdr->h_vlan_encapsulated_proto;
5841 } else {
5842 protocol = skb->protocol;
5843 }
5844
5845 switch (protocol) {
5846 case cpu_to_be16(ETH_P_IP):
5847 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
5848 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
5849 type_tucmd_mlhl |=
5850 IXGBE_ADVTXD_TUCMD_L4T_TCP;
5851 else if (ip_hdr(skb)->protocol == IPPROTO_SCTP)
5852 type_tucmd_mlhl |=
5853 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
5854 break;
5855 case cpu_to_be16(ETH_P_IPV6):
5856 /* XXX what about other V6 headers?? */
5857 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
5858 type_tucmd_mlhl |=
5859 IXGBE_ADVTXD_TUCMD_L4T_TCP;
5860 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_SCTP)
5861 type_tucmd_mlhl |=
5862 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
5863 break;
5864 default:
5865 if (unlikely(net_ratelimit())) {
5866 e_warn("partial checksum but "
5867 "proto=%x!\n", skb->protocol);
5868 }
5869 break;
5870 }
5871 }
5872
5873 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
5874 /* use index zero for tx checksum offload */
5875 context_desc->mss_l4len_idx = 0;
5876
5877 tx_buffer_info->time_stamp = jiffies;
5878 tx_buffer_info->next_to_watch = i;
5879
5880 i++;
5881 if (i == tx_ring->count)
5882 i = 0;
5883 tx_ring->next_to_use = i;
5884
5885 return true;
5886 }
5887
5888 return false;
5889 }
5890
5891 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
5892 struct ixgbe_ring *tx_ring,
5893 struct sk_buff *skb, u32 tx_flags,
5894 unsigned int first)
5895 {
5896 struct pci_dev *pdev = adapter->pdev;
5897 struct ixgbe_tx_buffer *tx_buffer_info;
5898 unsigned int len;
5899 unsigned int total = skb->len;
5900 unsigned int offset = 0, size, count = 0, i;
5901 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
5902 unsigned int f;
5903
5904 i = tx_ring->next_to_use;
5905
5906 if (tx_flags & IXGBE_TX_FLAGS_FCOE)
5907 /* excluding fcoe_crc_eof for FCoE */
5908 total -= sizeof(struct fcoe_crc_eof);
5909
5910 len = min(skb_headlen(skb), total);
5911 while (len) {
5912 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5913 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
5914
5915 tx_buffer_info->length = size;
5916 tx_buffer_info->mapped_as_page = false;
5917 tx_buffer_info->dma = dma_map_single(&pdev->dev,
5918 skb->data + offset,
5919 size, DMA_TO_DEVICE);
5920 if (dma_mapping_error(&pdev->dev, tx_buffer_info->dma))
5921 goto dma_error;
5922 tx_buffer_info->time_stamp = jiffies;
5923 tx_buffer_info->next_to_watch = i;
5924
5925 len -= size;
5926 total -= size;
5927 offset += size;
5928 count++;
5929
5930 if (len) {
5931 i++;
5932 if (i == tx_ring->count)
5933 i = 0;
5934 }
5935 }
5936
5937 for (f = 0; f < nr_frags; f++) {
5938 struct skb_frag_struct *frag;
5939
5940 frag = &skb_shinfo(skb)->frags[f];
5941 len = min((unsigned int)frag->size, total);
5942 offset = frag->page_offset;
5943
5944 while (len) {
5945 i++;
5946 if (i == tx_ring->count)
5947 i = 0;
5948
5949 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5950 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
5951
5952 tx_buffer_info->length = size;
5953 tx_buffer_info->dma = dma_map_page(&adapter->pdev->dev,
5954 frag->page,
5955 offset, size,
5956 DMA_TO_DEVICE);
5957 tx_buffer_info->mapped_as_page = true;
5958 if (dma_mapping_error(&pdev->dev, tx_buffer_info->dma))
5959 goto dma_error;
5960 tx_buffer_info->time_stamp = jiffies;
5961 tx_buffer_info->next_to_watch = i;
5962
5963 len -= size;
5964 total -= size;
5965 offset += size;
5966 count++;
5967 }
5968 if (total == 0)
5969 break;
5970 }
5971
5972 tx_ring->tx_buffer_info[i].skb = skb;
5973 tx_ring->tx_buffer_info[first].next_to_watch = i;
5974
5975 return count;
5976
5977 dma_error:
5978 e_dev_err("TX DMA map failed\n");
5979
5980 /* clear timestamp and dma mappings for failed tx_buffer_info map */
5981 tx_buffer_info->dma = 0;
5982 tx_buffer_info->time_stamp = 0;
5983 tx_buffer_info->next_to_watch = 0;
5984 if (count)
5985 count--;
5986
5987 /* clear timestamp and dma mappings for remaining portion of packet */
5988 while (count--) {
5989 if (i==0)
5990 i += tx_ring->count;
5991 i--;
5992 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5993 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
5994 }
5995
5996 return 0;
5997 }
5998
5999 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
6000 struct ixgbe_ring *tx_ring,
6001 int tx_flags, int count, u32 paylen, u8 hdr_len)
6002 {
6003 union ixgbe_adv_tx_desc *tx_desc = NULL;
6004 struct ixgbe_tx_buffer *tx_buffer_info;
6005 u32 olinfo_status = 0, cmd_type_len = 0;
6006 unsigned int i;
6007 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
6008
6009 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
6010
6011 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
6012
6013 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
6014 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
6015
6016 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
6017 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6018
6019 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6020 IXGBE_ADVTXD_POPTS_SHIFT;
6021
6022 /* use index 1 context for tso */
6023 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6024 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
6025 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
6026 IXGBE_ADVTXD_POPTS_SHIFT;
6027
6028 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
6029 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6030 IXGBE_ADVTXD_POPTS_SHIFT;
6031
6032 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6033 olinfo_status |= IXGBE_ADVTXD_CC;
6034 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6035 if (tx_flags & IXGBE_TX_FLAGS_FSO)
6036 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6037 }
6038
6039 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
6040
6041 i = tx_ring->next_to_use;
6042 while (count--) {
6043 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6044 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
6045 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
6046 tx_desc->read.cmd_type_len =
6047 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
6048 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
6049 i++;
6050 if (i == tx_ring->count)
6051 i = 0;
6052 }
6053
6054 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
6055
6056 /*
6057 * Force memory writes to complete before letting h/w
6058 * know there are new descriptors to fetch. (Only
6059 * applicable for weak-ordered memory model archs,
6060 * such as IA-64).
6061 */
6062 wmb();
6063
6064 tx_ring->next_to_use = i;
6065 writel(i, adapter->hw.hw_addr + tx_ring->tail);
6066 }
6067
6068 static void ixgbe_atr(struct ixgbe_adapter *adapter, struct sk_buff *skb,
6069 int queue, u32 tx_flags)
6070 {
6071 /* Right now, we support IPv4 only */
6072 struct ixgbe_atr_input atr_input;
6073 struct tcphdr *th;
6074 struct iphdr *iph = ip_hdr(skb);
6075 struct ethhdr *eth = (struct ethhdr *)skb->data;
6076 u16 vlan_id, src_port, dst_port, flex_bytes;
6077 u32 src_ipv4_addr, dst_ipv4_addr;
6078 u8 l4type = 0;
6079
6080 /* check if we're UDP or TCP */
6081 if (iph->protocol == IPPROTO_TCP) {
6082 th = tcp_hdr(skb);
6083 src_port = th->source;
6084 dst_port = th->dest;
6085 l4type |= IXGBE_ATR_L4TYPE_TCP;
6086 /* l4type IPv4 type is 0, no need to assign */
6087 } else {
6088 /* Unsupported L4 header, just bail here */
6089 return;
6090 }
6091
6092 memset(&atr_input, 0, sizeof(struct ixgbe_atr_input));
6093
6094 vlan_id = (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK) >>
6095 IXGBE_TX_FLAGS_VLAN_SHIFT;
6096 src_ipv4_addr = iph->saddr;
6097 dst_ipv4_addr = iph->daddr;
6098 flex_bytes = eth->h_proto;
6099
6100 ixgbe_atr_set_vlan_id_82599(&atr_input, vlan_id);
6101 ixgbe_atr_set_src_port_82599(&atr_input, dst_port);
6102 ixgbe_atr_set_dst_port_82599(&atr_input, src_port);
6103 ixgbe_atr_set_flex_byte_82599(&atr_input, flex_bytes);
6104 ixgbe_atr_set_l4type_82599(&atr_input, l4type);
6105 /* src and dst are inverted, think how the receiver sees them */
6106 ixgbe_atr_set_src_ipv4_82599(&atr_input, dst_ipv4_addr);
6107 ixgbe_atr_set_dst_ipv4_82599(&atr_input, src_ipv4_addr);
6108
6109 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
6110 ixgbe_fdir_add_signature_filter_82599(&adapter->hw, &atr_input, queue);
6111 }
6112
6113 static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
6114 struct ixgbe_ring *tx_ring, int size)
6115 {
6116 netif_stop_subqueue(netdev, tx_ring->queue_index);
6117 /* Herbert's original patch had:
6118 * smp_mb__after_netif_stop_queue();
6119 * but since that doesn't exist yet, just open code it. */
6120 smp_mb();
6121
6122 /* We need to check again in a case another CPU has just
6123 * made room available. */
6124 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
6125 return -EBUSY;
6126
6127 /* A reprieve! - use start_queue because it doesn't call schedule */
6128 netif_start_subqueue(netdev, tx_ring->queue_index);
6129 ++tx_ring->restart_queue;
6130 return 0;
6131 }
6132
6133 static int ixgbe_maybe_stop_tx(struct net_device *netdev,
6134 struct ixgbe_ring *tx_ring, int size)
6135 {
6136 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
6137 return 0;
6138 return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
6139 }
6140
6141 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
6142 {
6143 struct ixgbe_adapter *adapter = netdev_priv(dev);
6144 int txq = smp_processor_id();
6145
6146 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
6147 while (unlikely(txq >= dev->real_num_tx_queues))
6148 txq -= dev->real_num_tx_queues;
6149 return txq;
6150 }
6151
6152 #ifdef IXGBE_FCOE
6153 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
6154 ((skb->protocol == htons(ETH_P_FCOE)) ||
6155 (skb->protocol == htons(ETH_P_FIP)))) {
6156 txq &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
6157 txq += adapter->ring_feature[RING_F_FCOE].mask;
6158 return txq;
6159 }
6160 #endif
6161 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6162 if (skb->priority == TC_PRIO_CONTROL)
6163 txq = adapter->ring_feature[RING_F_DCB].indices-1;
6164 else
6165 txq = (skb->vlan_tci & IXGBE_TX_FLAGS_VLAN_PRIO_MASK)
6166 >> 13;
6167 return txq;
6168 }
6169
6170 return skb_tx_hash(dev, skb);
6171 }
6172
6173 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
6174 struct net_device *netdev)
6175 {
6176 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6177 struct ixgbe_ring *tx_ring;
6178 struct netdev_queue *txq;
6179 unsigned int first;
6180 unsigned int tx_flags = 0;
6181 u8 hdr_len = 0;
6182 int tso;
6183 int count = 0;
6184 unsigned int f;
6185
6186 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
6187 tx_flags |= vlan_tx_tag_get(skb);
6188 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6189 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
6190 tx_flags |= ((skb->queue_mapping & 0x7) << 13);
6191 }
6192 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6193 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6194 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED &&
6195 skb->priority != TC_PRIO_CONTROL) {
6196 tx_flags |= ((skb->queue_mapping & 0x7) << 13);
6197 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6198 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6199 }
6200
6201 tx_ring = adapter->tx_ring[skb->queue_mapping];
6202
6203 #ifdef IXGBE_FCOE
6204 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
6205 #ifdef CONFIG_IXGBE_DCB
6206 /* for FCoE with DCB, we force the priority to what
6207 * was specified by the switch */
6208 if ((skb->protocol == htons(ETH_P_FCOE)) ||
6209 (skb->protocol == htons(ETH_P_FIP))) {
6210 tx_flags &= ~(IXGBE_TX_FLAGS_VLAN_PRIO_MASK
6211 << IXGBE_TX_FLAGS_VLAN_SHIFT);
6212 tx_flags |= ((adapter->fcoe.up << 13)
6213 << IXGBE_TX_FLAGS_VLAN_SHIFT);
6214 }
6215 #endif
6216 /* flag for FCoE offloads */
6217 if (skb->protocol == htons(ETH_P_FCOE))
6218 tx_flags |= IXGBE_TX_FLAGS_FCOE;
6219 }
6220 #endif
6221
6222 /* four things can cause us to need a context descriptor */
6223 if (skb_is_gso(skb) ||
6224 (skb->ip_summed == CHECKSUM_PARTIAL) ||
6225 (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
6226 (tx_flags & IXGBE_TX_FLAGS_FCOE))
6227 count++;
6228
6229 count += TXD_USE_COUNT(skb_headlen(skb));
6230 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
6231 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
6232
6233 if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
6234 adapter->tx_busy++;
6235 return NETDEV_TX_BUSY;
6236 }
6237
6238 first = tx_ring->next_to_use;
6239 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6240 #ifdef IXGBE_FCOE
6241 /* setup tx offload for FCoE */
6242 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
6243 if (tso < 0) {
6244 dev_kfree_skb_any(skb);
6245 return NETDEV_TX_OK;
6246 }
6247 if (tso)
6248 tx_flags |= IXGBE_TX_FLAGS_FSO;
6249 #endif /* IXGBE_FCOE */
6250 } else {
6251 if (skb->protocol == htons(ETH_P_IP))
6252 tx_flags |= IXGBE_TX_FLAGS_IPV4;
6253 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
6254 if (tso < 0) {
6255 dev_kfree_skb_any(skb);
6256 return NETDEV_TX_OK;
6257 }
6258
6259 if (tso)
6260 tx_flags |= IXGBE_TX_FLAGS_TSO;
6261 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
6262 (skb->ip_summed == CHECKSUM_PARTIAL))
6263 tx_flags |= IXGBE_TX_FLAGS_CSUM;
6264 }
6265
6266 count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first);
6267 if (count) {
6268 /* add the ATR filter if ATR is on */
6269 if (tx_ring->atr_sample_rate) {
6270 ++tx_ring->atr_count;
6271 if ((tx_ring->atr_count >= tx_ring->atr_sample_rate) &&
6272 test_bit(__IXGBE_FDIR_INIT_DONE,
6273 &tx_ring->reinit_state)) {
6274 ixgbe_atr(adapter, skb, tx_ring->queue_index,
6275 tx_flags);
6276 tx_ring->atr_count = 0;
6277 }
6278 }
6279 txq = netdev_get_tx_queue(netdev, tx_ring->queue_index);
6280 txq->tx_bytes += skb->len;
6281 txq->tx_packets++;
6282 ixgbe_tx_queue(adapter, tx_ring, tx_flags, count, skb->len,
6283 hdr_len);
6284 ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
6285
6286 } else {
6287 dev_kfree_skb_any(skb);
6288 tx_ring->tx_buffer_info[first].time_stamp = 0;
6289 tx_ring->next_to_use = first;
6290 }
6291
6292 return NETDEV_TX_OK;
6293 }
6294
6295 /**
6296 * ixgbe_set_mac - Change the Ethernet Address of the NIC
6297 * @netdev: network interface device structure
6298 * @p: pointer to an address structure
6299 *
6300 * Returns 0 on success, negative on failure
6301 **/
6302 static int ixgbe_set_mac(struct net_device *netdev, void *p)
6303 {
6304 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6305 struct ixgbe_hw *hw = &adapter->hw;
6306 struct sockaddr *addr = p;
6307
6308 if (!is_valid_ether_addr(addr->sa_data))
6309 return -EADDRNOTAVAIL;
6310
6311 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
6312 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
6313
6314 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
6315 IXGBE_RAH_AV);
6316
6317 return 0;
6318 }
6319
6320 static int
6321 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
6322 {
6323 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6324 struct ixgbe_hw *hw = &adapter->hw;
6325 u16 value;
6326 int rc;
6327
6328 if (prtad != hw->phy.mdio.prtad)
6329 return -EINVAL;
6330 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
6331 if (!rc)
6332 rc = value;
6333 return rc;
6334 }
6335
6336 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
6337 u16 addr, u16 value)
6338 {
6339 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6340 struct ixgbe_hw *hw = &adapter->hw;
6341
6342 if (prtad != hw->phy.mdio.prtad)
6343 return -EINVAL;
6344 return hw->phy.ops.write_reg(hw, addr, devad, value);
6345 }
6346
6347 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
6348 {
6349 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6350
6351 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
6352 }
6353
6354 /**
6355 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
6356 * netdev->dev_addrs
6357 * @netdev: network interface device structure
6358 *
6359 * Returns non-zero on failure
6360 **/
6361 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
6362 {
6363 int err = 0;
6364 struct ixgbe_adapter *adapter = netdev_priv(dev);
6365 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6366
6367 if (is_valid_ether_addr(mac->san_addr)) {
6368 rtnl_lock();
6369 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6370 rtnl_unlock();
6371 }
6372 return err;
6373 }
6374
6375 /**
6376 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
6377 * netdev->dev_addrs
6378 * @netdev: network interface device structure
6379 *
6380 * Returns non-zero on failure
6381 **/
6382 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
6383 {
6384 int err = 0;
6385 struct ixgbe_adapter *adapter = netdev_priv(dev);
6386 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6387
6388 if (is_valid_ether_addr(mac->san_addr)) {
6389 rtnl_lock();
6390 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6391 rtnl_unlock();
6392 }
6393 return err;
6394 }
6395
6396 #ifdef CONFIG_NET_POLL_CONTROLLER
6397 /*
6398 * Polling 'interrupt' - used by things like netconsole to send skbs
6399 * without having to re-enable interrupts. It's not called while
6400 * the interrupt routine is executing.
6401 */
6402 static void ixgbe_netpoll(struct net_device *netdev)
6403 {
6404 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6405 int i;
6406
6407 /* if interface is down do nothing */
6408 if (test_bit(__IXGBE_DOWN, &adapter->state))
6409 return;
6410
6411 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
6412 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
6413 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
6414 for (i = 0; i < num_q_vectors; i++) {
6415 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
6416 ixgbe_msix_clean_many(0, q_vector);
6417 }
6418 } else {
6419 ixgbe_intr(adapter->pdev->irq, netdev);
6420 }
6421 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
6422 }
6423 #endif
6424
6425 static const struct net_device_ops ixgbe_netdev_ops = {
6426 .ndo_open = ixgbe_open,
6427 .ndo_stop = ixgbe_close,
6428 .ndo_start_xmit = ixgbe_xmit_frame,
6429 .ndo_select_queue = ixgbe_select_queue,
6430 .ndo_set_rx_mode = ixgbe_set_rx_mode,
6431 .ndo_set_multicast_list = ixgbe_set_rx_mode,
6432 .ndo_validate_addr = eth_validate_addr,
6433 .ndo_set_mac_address = ixgbe_set_mac,
6434 .ndo_change_mtu = ixgbe_change_mtu,
6435 .ndo_tx_timeout = ixgbe_tx_timeout,
6436 .ndo_vlan_rx_register = ixgbe_vlan_rx_register,
6437 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
6438 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
6439 .ndo_do_ioctl = ixgbe_ioctl,
6440 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
6441 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
6442 .ndo_set_vf_tx_rate = ixgbe_ndo_set_vf_bw,
6443 .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
6444 #ifdef CONFIG_NET_POLL_CONTROLLER
6445 .ndo_poll_controller = ixgbe_netpoll,
6446 #endif
6447 #ifdef IXGBE_FCOE
6448 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
6449 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
6450 .ndo_fcoe_enable = ixgbe_fcoe_enable,
6451 .ndo_fcoe_disable = ixgbe_fcoe_disable,
6452 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
6453 #endif /* IXGBE_FCOE */
6454 };
6455
6456 static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter,
6457 const struct ixgbe_info *ii)
6458 {
6459 #ifdef CONFIG_PCI_IOV
6460 struct ixgbe_hw *hw = &adapter->hw;
6461 int err;
6462
6463 if (hw->mac.type != ixgbe_mac_82599EB || !max_vfs)
6464 return;
6465
6466 /* The 82599 supports up to 64 VFs per physical function
6467 * but this implementation limits allocation to 63 so that
6468 * basic networking resources are still available to the
6469 * physical function
6470 */
6471 adapter->num_vfs = (max_vfs > 63) ? 63 : max_vfs;
6472 adapter->flags |= IXGBE_FLAG_SRIOV_ENABLED;
6473 err = pci_enable_sriov(adapter->pdev, adapter->num_vfs);
6474 if (err) {
6475 e_err("Failed to enable PCI sriov: %d\n", err);
6476 goto err_novfs;
6477 }
6478 /* If call to enable VFs succeeded then allocate memory
6479 * for per VF control structures.
6480 */
6481 adapter->vfinfo =
6482 kcalloc(adapter->num_vfs,
6483 sizeof(struct vf_data_storage), GFP_KERNEL);
6484 if (adapter->vfinfo) {
6485 /* Now that we're sure SR-IOV is enabled
6486 * and memory allocated set up the mailbox parameters
6487 */
6488 ixgbe_init_mbx_params_pf(hw);
6489 memcpy(&hw->mbx.ops, ii->mbx_ops,
6490 sizeof(hw->mbx.ops));
6491
6492 /* Disable RSC when in SR-IOV mode */
6493 adapter->flags2 &= ~(IXGBE_FLAG2_RSC_CAPABLE |
6494 IXGBE_FLAG2_RSC_ENABLED);
6495 return;
6496 }
6497
6498 /* Oh oh */
6499 e_err("Unable to allocate memory for VF Data Storage - SRIOV "
6500 "disabled\n");
6501 pci_disable_sriov(adapter->pdev);
6502
6503 err_novfs:
6504 adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
6505 adapter->num_vfs = 0;
6506 #endif /* CONFIG_PCI_IOV */
6507 }
6508
6509 /**
6510 * ixgbe_probe - Device Initialization Routine
6511 * @pdev: PCI device information struct
6512 * @ent: entry in ixgbe_pci_tbl
6513 *
6514 * Returns 0 on success, negative on failure
6515 *
6516 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
6517 * The OS initialization, configuring of the adapter private structure,
6518 * and a hardware reset occur.
6519 **/
6520 static int __devinit ixgbe_probe(struct pci_dev *pdev,
6521 const struct pci_device_id *ent)
6522 {
6523 struct net_device *netdev;
6524 struct ixgbe_adapter *adapter = NULL;
6525 struct ixgbe_hw *hw;
6526 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
6527 static int cards_found;
6528 int i, err, pci_using_dac;
6529 unsigned int indices = num_possible_cpus();
6530 #ifdef IXGBE_FCOE
6531 u16 device_caps;
6532 #endif
6533 u32 part_num, eec;
6534
6535 err = pci_enable_device_mem(pdev);
6536 if (err)
6537 return err;
6538
6539 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
6540 !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
6541 pci_using_dac = 1;
6542 } else {
6543 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
6544 if (err) {
6545 err = dma_set_coherent_mask(&pdev->dev,
6546 DMA_BIT_MASK(32));
6547 if (err) {
6548 e_dev_err("No usable DMA configuration, "
6549 "aborting\n");
6550 goto err_dma;
6551 }
6552 }
6553 pci_using_dac = 0;
6554 }
6555
6556 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
6557 IORESOURCE_MEM), ixgbe_driver_name);
6558 if (err) {
6559 e_dev_err("pci_request_selected_regions failed 0x%x\n", err);
6560 goto err_pci_reg;
6561 }
6562
6563 pci_enable_pcie_error_reporting(pdev);
6564
6565 pci_set_master(pdev);
6566 pci_save_state(pdev);
6567
6568 if (ii->mac == ixgbe_mac_82598EB)
6569 indices = min_t(unsigned int, indices, IXGBE_MAX_RSS_INDICES);
6570 else
6571 indices = min_t(unsigned int, indices, IXGBE_MAX_FDIR_INDICES);
6572
6573 indices = max_t(unsigned int, indices, IXGBE_MAX_DCB_INDICES);
6574 #ifdef IXGBE_FCOE
6575 indices += min_t(unsigned int, num_possible_cpus(),
6576 IXGBE_MAX_FCOE_INDICES);
6577 #endif
6578 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
6579 if (!netdev) {
6580 err = -ENOMEM;
6581 goto err_alloc_etherdev;
6582 }
6583
6584 SET_NETDEV_DEV(netdev, &pdev->dev);
6585
6586 pci_set_drvdata(pdev, netdev);
6587 adapter = netdev_priv(netdev);
6588
6589 adapter->netdev = netdev;
6590 adapter->pdev = pdev;
6591 hw = &adapter->hw;
6592 hw->back = adapter;
6593 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
6594
6595 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
6596 pci_resource_len(pdev, 0));
6597 if (!hw->hw_addr) {
6598 err = -EIO;
6599 goto err_ioremap;
6600 }
6601
6602 for (i = 1; i <= 5; i++) {
6603 if (pci_resource_len(pdev, i) == 0)
6604 continue;
6605 }
6606
6607 netdev->netdev_ops = &ixgbe_netdev_ops;
6608 ixgbe_set_ethtool_ops(netdev);
6609 netdev->watchdog_timeo = 5 * HZ;
6610 strcpy(netdev->name, pci_name(pdev));
6611
6612 adapter->bd_number = cards_found;
6613
6614 /* Setup hw api */
6615 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
6616 hw->mac.type = ii->mac;
6617
6618 /* EEPROM */
6619 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
6620 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
6621 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
6622 if (!(eec & (1 << 8)))
6623 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
6624
6625 /* PHY */
6626 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
6627 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
6628 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
6629 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
6630 hw->phy.mdio.mmds = 0;
6631 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
6632 hw->phy.mdio.dev = netdev;
6633 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
6634 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
6635
6636 /* set up this timer and work struct before calling get_invariants
6637 * which might start the timer
6638 */
6639 init_timer(&adapter->sfp_timer);
6640 adapter->sfp_timer.function = &ixgbe_sfp_timer;
6641 adapter->sfp_timer.data = (unsigned long) adapter;
6642
6643 INIT_WORK(&adapter->sfp_task, ixgbe_sfp_task);
6644
6645 /* multispeed fiber has its own tasklet, called from GPI SDP1 context */
6646 INIT_WORK(&adapter->multispeed_fiber_task, ixgbe_multispeed_fiber_task);
6647
6648 /* a new SFP+ module arrival, called from GPI SDP2 context */
6649 INIT_WORK(&adapter->sfp_config_module_task,
6650 ixgbe_sfp_config_module_task);
6651
6652 ii->get_invariants(hw);
6653
6654 /* setup the private structure */
6655 err = ixgbe_sw_init(adapter);
6656 if (err)
6657 goto err_sw_init;
6658
6659 /* Make it possible the adapter to be woken up via WOL */
6660 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
6661 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
6662
6663 /*
6664 * If there is a fan on this device and it has failed log the
6665 * failure.
6666 */
6667 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
6668 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
6669 if (esdp & IXGBE_ESDP_SDP1)
6670 e_crit("Fan has stopped, replace the adapter\n");
6671 }
6672
6673 /* reset_hw fills in the perm_addr as well */
6674 hw->phy.reset_if_overtemp = true;
6675 err = hw->mac.ops.reset_hw(hw);
6676 hw->phy.reset_if_overtemp = false;
6677 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
6678 hw->mac.type == ixgbe_mac_82598EB) {
6679 /*
6680 * Start a kernel thread to watch for a module to arrive.
6681 * Only do this for 82598, since 82599 will generate
6682 * interrupts on module arrival.
6683 */
6684 set_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
6685 mod_timer(&adapter->sfp_timer,
6686 round_jiffies(jiffies + (2 * HZ)));
6687 err = 0;
6688 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
6689 e_dev_err("failed to initialize because an unsupported SFP+ "
6690 "module type was detected.\n");
6691 e_dev_err("Reload the driver after installing a supported "
6692 "module.\n");
6693 goto err_sw_init;
6694 } else if (err) {
6695 e_dev_err("HW Init failed: %d\n", err);
6696 goto err_sw_init;
6697 }
6698
6699 ixgbe_probe_vf(adapter, ii);
6700
6701 netdev->features = NETIF_F_SG |
6702 NETIF_F_IP_CSUM |
6703 NETIF_F_HW_VLAN_TX |
6704 NETIF_F_HW_VLAN_RX |
6705 NETIF_F_HW_VLAN_FILTER;
6706
6707 netdev->features |= NETIF_F_IPV6_CSUM;
6708 netdev->features |= NETIF_F_TSO;
6709 netdev->features |= NETIF_F_TSO6;
6710 netdev->features |= NETIF_F_GRO;
6711
6712 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
6713 netdev->features |= NETIF_F_SCTP_CSUM;
6714
6715 netdev->vlan_features |= NETIF_F_TSO;
6716 netdev->vlan_features |= NETIF_F_TSO6;
6717 netdev->vlan_features |= NETIF_F_IP_CSUM;
6718 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
6719 netdev->vlan_features |= NETIF_F_SG;
6720
6721 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6722 adapter->flags &= ~(IXGBE_FLAG_RSS_ENABLED |
6723 IXGBE_FLAG_DCB_ENABLED);
6724 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
6725 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
6726
6727 #ifdef CONFIG_IXGBE_DCB
6728 netdev->dcbnl_ops = &dcbnl_ops;
6729 #endif
6730
6731 #ifdef IXGBE_FCOE
6732 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
6733 if (hw->mac.ops.get_device_caps) {
6734 hw->mac.ops.get_device_caps(hw, &device_caps);
6735 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
6736 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
6737 }
6738 }
6739 #endif /* IXGBE_FCOE */
6740 if (pci_using_dac)
6741 netdev->features |= NETIF_F_HIGHDMA;
6742
6743 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
6744 netdev->features |= NETIF_F_LRO;
6745
6746 /* make sure the EEPROM is good */
6747 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
6748 e_dev_err("The EEPROM Checksum Is Not Valid\n");
6749 err = -EIO;
6750 goto err_eeprom;
6751 }
6752
6753 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
6754 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
6755
6756 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
6757 e_dev_err("invalid MAC address\n");
6758 err = -EIO;
6759 goto err_eeprom;
6760 }
6761
6762 /* power down the optics */
6763 if (hw->phy.multispeed_fiber)
6764 hw->mac.ops.disable_tx_laser(hw);
6765
6766 init_timer(&adapter->watchdog_timer);
6767 adapter->watchdog_timer.function = &ixgbe_watchdog;
6768 adapter->watchdog_timer.data = (unsigned long)adapter;
6769
6770 INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
6771 INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
6772
6773 err = ixgbe_init_interrupt_scheme(adapter);
6774 if (err)
6775 goto err_sw_init;
6776
6777 switch (pdev->device) {
6778 case IXGBE_DEV_ID_82599_KX4:
6779 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
6780 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
6781 break;
6782 default:
6783 adapter->wol = 0;
6784 break;
6785 }
6786 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
6787
6788 /* pick up the PCI bus settings for reporting later */
6789 hw->mac.ops.get_bus_info(hw);
6790
6791 /* print bus type/speed/width info */
6792 e_dev_info("(PCI Express:%s:%s) %pM\n",
6793 ((hw->bus.speed == ixgbe_bus_speed_5000) ? "5.0Gb/s":
6794 (hw->bus.speed == ixgbe_bus_speed_2500) ? "2.5Gb/s":"Unknown"),
6795 ((hw->bus.width == ixgbe_bus_width_pcie_x8) ? "Width x8" :
6796 (hw->bus.width == ixgbe_bus_width_pcie_x4) ? "Width x4" :
6797 (hw->bus.width == ixgbe_bus_width_pcie_x1) ? "Width x1" :
6798 "Unknown"),
6799 netdev->dev_addr);
6800 ixgbe_read_pba_num_generic(hw, &part_num);
6801 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
6802 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, "
6803 "PBA No: %06x-%03x\n",
6804 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
6805 (part_num >> 8), (part_num & 0xff));
6806 else
6807 e_dev_info("MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
6808 hw->mac.type, hw->phy.type,
6809 (part_num >> 8), (part_num & 0xff));
6810
6811 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
6812 e_dev_warn("PCI-Express bandwidth available for this card is "
6813 "not sufficient for optimal performance.\n");
6814 e_dev_warn("For optimal performance a x8 PCI-Express slot "
6815 "is required.\n");
6816 }
6817
6818 /* save off EEPROM version number */
6819 hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
6820
6821 /* reset the hardware with the new settings */
6822 err = hw->mac.ops.start_hw(hw);
6823
6824 if (err == IXGBE_ERR_EEPROM_VERSION) {
6825 /* We are running on a pre-production device, log a warning */
6826 e_dev_warn("This device is a pre-production adapter/LOM. "
6827 "Please be aware there may be issues associated "
6828 "with your hardware. If you are experiencing "
6829 "problems please contact your Intel or hardware "
6830 "representative who provided you with this "
6831 "hardware.\n");
6832 }
6833 strcpy(netdev->name, "eth%d");
6834 err = register_netdev(netdev);
6835 if (err)
6836 goto err_register;
6837
6838 /* carrier off reporting is important to ethtool even BEFORE open */
6839 netif_carrier_off(netdev);
6840
6841 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
6842 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
6843 INIT_WORK(&adapter->fdir_reinit_task, ixgbe_fdir_reinit_task);
6844
6845 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
6846 INIT_WORK(&adapter->check_overtemp_task, ixgbe_check_overtemp_task);
6847 #ifdef CONFIG_IXGBE_DCA
6848 if (dca_add_requester(&pdev->dev) == 0) {
6849 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
6850 ixgbe_setup_dca(adapter);
6851 }
6852 #endif
6853 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
6854 e_info("IOV is enabled with %d VFs\n", adapter->num_vfs);
6855 for (i = 0; i < adapter->num_vfs; i++)
6856 ixgbe_vf_configuration(pdev, (i | 0x10000000));
6857 }
6858
6859 /* add san mac addr to netdev */
6860 ixgbe_add_sanmac_netdev(netdev);
6861
6862 e_dev_info("Intel(R) 10 Gigabit Network Connection\n");
6863 cards_found++;
6864 return 0;
6865
6866 err_register:
6867 ixgbe_release_hw_control(adapter);
6868 ixgbe_clear_interrupt_scheme(adapter);
6869 err_sw_init:
6870 err_eeprom:
6871 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6872 ixgbe_disable_sriov(adapter);
6873 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
6874 del_timer_sync(&adapter->sfp_timer);
6875 cancel_work_sync(&adapter->sfp_task);
6876 cancel_work_sync(&adapter->multispeed_fiber_task);
6877 cancel_work_sync(&adapter->sfp_config_module_task);
6878 iounmap(hw->hw_addr);
6879 err_ioremap:
6880 free_netdev(netdev);
6881 err_alloc_etherdev:
6882 pci_release_selected_regions(pdev, pci_select_bars(pdev,
6883 IORESOURCE_MEM));
6884 err_pci_reg:
6885 err_dma:
6886 pci_disable_device(pdev);
6887 return err;
6888 }
6889
6890 /**
6891 * ixgbe_remove - Device Removal Routine
6892 * @pdev: PCI device information struct
6893 *
6894 * ixgbe_remove is called by the PCI subsystem to alert the driver
6895 * that it should release a PCI device. The could be caused by a
6896 * Hot-Plug event, or because the driver is going to be removed from
6897 * memory.
6898 **/
6899 static void __devexit ixgbe_remove(struct pci_dev *pdev)
6900 {
6901 struct net_device *netdev = pci_get_drvdata(pdev);
6902 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6903
6904 set_bit(__IXGBE_DOWN, &adapter->state);
6905 /* clear the module not found bit to make sure the worker won't
6906 * reschedule
6907 */
6908 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
6909 del_timer_sync(&adapter->watchdog_timer);
6910
6911 del_timer_sync(&adapter->sfp_timer);
6912 cancel_work_sync(&adapter->watchdog_task);
6913 cancel_work_sync(&adapter->sfp_task);
6914 cancel_work_sync(&adapter->multispeed_fiber_task);
6915 cancel_work_sync(&adapter->sfp_config_module_task);
6916 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
6917 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
6918 cancel_work_sync(&adapter->fdir_reinit_task);
6919 flush_scheduled_work();
6920
6921 #ifdef CONFIG_IXGBE_DCA
6922 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
6923 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
6924 dca_remove_requester(&pdev->dev);
6925 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
6926 }
6927
6928 #endif
6929 #ifdef IXGBE_FCOE
6930 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
6931 ixgbe_cleanup_fcoe(adapter);
6932
6933 #endif /* IXGBE_FCOE */
6934
6935 /* remove the added san mac */
6936 ixgbe_del_sanmac_netdev(netdev);
6937
6938 if (netdev->reg_state == NETREG_REGISTERED)
6939 unregister_netdev(netdev);
6940
6941 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6942 ixgbe_disable_sriov(adapter);
6943
6944 ixgbe_clear_interrupt_scheme(adapter);
6945
6946 ixgbe_release_hw_control(adapter);
6947
6948 iounmap(adapter->hw.hw_addr);
6949 pci_release_selected_regions(pdev, pci_select_bars(pdev,
6950 IORESOURCE_MEM));
6951
6952 e_dev_info("complete\n");
6953
6954 free_netdev(netdev);
6955
6956 pci_disable_pcie_error_reporting(pdev);
6957
6958 pci_disable_device(pdev);
6959 }
6960
6961 /**
6962 * ixgbe_io_error_detected - called when PCI error is detected
6963 * @pdev: Pointer to PCI device
6964 * @state: The current pci connection state
6965 *
6966 * This function is called after a PCI bus error affecting
6967 * this device has been detected.
6968 */
6969 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
6970 pci_channel_state_t state)
6971 {
6972 struct net_device *netdev = pci_get_drvdata(pdev);
6973 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6974
6975 netif_device_detach(netdev);
6976
6977 if (state == pci_channel_io_perm_failure)
6978 return PCI_ERS_RESULT_DISCONNECT;
6979
6980 if (netif_running(netdev))
6981 ixgbe_down(adapter);
6982 pci_disable_device(pdev);
6983
6984 /* Request a slot reset. */
6985 return PCI_ERS_RESULT_NEED_RESET;
6986 }
6987
6988 /**
6989 * ixgbe_io_slot_reset - called after the pci bus has been reset.
6990 * @pdev: Pointer to PCI device
6991 *
6992 * Restart the card from scratch, as if from a cold-boot.
6993 */
6994 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
6995 {
6996 struct net_device *netdev = pci_get_drvdata(pdev);
6997 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6998 pci_ers_result_t result;
6999 int err;
7000
7001 if (pci_enable_device_mem(pdev)) {
7002 e_err("Cannot re-enable PCI device after reset.\n");
7003 result = PCI_ERS_RESULT_DISCONNECT;
7004 } else {
7005 pci_set_master(pdev);
7006 pci_restore_state(pdev);
7007 pci_save_state(pdev);
7008
7009 pci_wake_from_d3(pdev, false);
7010
7011 ixgbe_reset(adapter);
7012 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7013 result = PCI_ERS_RESULT_RECOVERED;
7014 }
7015
7016 err = pci_cleanup_aer_uncorrect_error_status(pdev);
7017 if (err) {
7018 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
7019 "failed 0x%0x\n", err);
7020 /* non-fatal, continue */
7021 }
7022
7023 return result;
7024 }
7025
7026 /**
7027 * ixgbe_io_resume - called when traffic can start flowing again.
7028 * @pdev: Pointer to PCI device
7029 *
7030 * This callback is called when the error recovery driver tells us that
7031 * its OK to resume normal operation.
7032 */
7033 static void ixgbe_io_resume(struct pci_dev *pdev)
7034 {
7035 struct net_device *netdev = pci_get_drvdata(pdev);
7036 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7037
7038 if (netif_running(netdev)) {
7039 if (ixgbe_up(adapter)) {
7040 e_info("ixgbe_up failed after reset\n");
7041 return;
7042 }
7043 }
7044
7045 netif_device_attach(netdev);
7046 }
7047
7048 static struct pci_error_handlers ixgbe_err_handler = {
7049 .error_detected = ixgbe_io_error_detected,
7050 .slot_reset = ixgbe_io_slot_reset,
7051 .resume = ixgbe_io_resume,
7052 };
7053
7054 static struct pci_driver ixgbe_driver = {
7055 .name = ixgbe_driver_name,
7056 .id_table = ixgbe_pci_tbl,
7057 .probe = ixgbe_probe,
7058 .remove = __devexit_p(ixgbe_remove),
7059 #ifdef CONFIG_PM
7060 .suspend = ixgbe_suspend,
7061 .resume = ixgbe_resume,
7062 #endif
7063 .shutdown = ixgbe_shutdown,
7064 .err_handler = &ixgbe_err_handler
7065 };
7066
7067 /**
7068 * ixgbe_init_module - Driver Registration Routine
7069 *
7070 * ixgbe_init_module is the first routine called when the driver is
7071 * loaded. All it does is register with the PCI subsystem.
7072 **/
7073 static int __init ixgbe_init_module(void)
7074 {
7075 int ret;
7076 pr_info("%s - version %s\n", ixgbe_driver_string,
7077 ixgbe_driver_version);
7078 pr_info("%s\n", ixgbe_copyright);
7079
7080 #ifdef CONFIG_IXGBE_DCA
7081 dca_register_notify(&dca_notifier);
7082 #endif
7083
7084 ret = pci_register_driver(&ixgbe_driver);
7085 return ret;
7086 }
7087
7088 module_init(ixgbe_init_module);
7089
7090 /**
7091 * ixgbe_exit_module - Driver Exit Cleanup Routine
7092 *
7093 * ixgbe_exit_module is called just before the driver is removed
7094 * from memory.
7095 **/
7096 static void __exit ixgbe_exit_module(void)
7097 {
7098 #ifdef CONFIG_IXGBE_DCA
7099 dca_unregister_notify(&dca_notifier);
7100 #endif
7101 pci_unregister_driver(&ixgbe_driver);
7102 }
7103
7104 #ifdef CONFIG_IXGBE_DCA
7105 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
7106 void *p)
7107 {
7108 int ret_val;
7109
7110 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
7111 __ixgbe_notify_dca);
7112
7113 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
7114 }
7115
7116 #endif /* CONFIG_IXGBE_DCA */
7117
7118 /**
7119 * ixgbe_get_hw_dev return device
7120 * used by hardware layer to print debugging information
7121 **/
7122 struct net_device *ixgbe_get_hw_dev(struct ixgbe_hw *hw)
7123 {
7124 struct ixgbe_adapter *adapter = hw->back;
7125 return adapter->netdev;
7126 }
7127
7128 module_exit(ixgbe_exit_module);
7129
7130 /* ixgbe_main.c */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree