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ixgbe: update all DESC_ADV macros to accept a ring pointer
[net-next-2.6.git] / drivers / net / ixgbe / ixgbe_main.c
... / ...
CommitLineData
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
51char ixgbe_driver_name[] = "ixgbe";
52static const char ixgbe_driver_string[] =
53 "Intel(R) 10 Gigabit PCI Express Network Driver";
54
55#define DRV_VERSION "2.0.84-k2"
56const char ixgbe_driver_version[] = DRV_VERSION;
57static char ixgbe_copyright[] = "Copyright (c) 1999-2010 Intel Corporation.";
58
59static 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 */
72static 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};
119MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
120
121#ifdef CONFIG_IXGBE_DCA
122static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
123 void *p);
124static 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
132static unsigned int max_vfs;
133module_param(max_vfs, uint, 0);
134MODULE_PARM_DESC(max_vfs, "Maximum number of virtual functions to allocate "
135 "per physical function");
136#endif /* CONFIG_PCI_IOV */
137
138MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
139MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
140MODULE_LICENSE("GPL");
141MODULE_VERSION(DRV_VERSION);
142
143#define DEFAULT_DEBUG_LEVEL_SHIFT 3
144
145static 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
180struct ixgbe_reg_info {
181 u32 ofs;
182 char *name;
183};
184
185static 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 */
221static 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 */
303static 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 */
420rx_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
515exit:
516 return;
517}
518
519static 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
529static 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 */
547static 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
588static 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
604static 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 */
639static 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
684static 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(drv, "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
727static 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 **/
734static 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 rmb(); /* read buffer_info after eop_desc */
752 for ( ; !cleaned; count++) {
753 struct sk_buff *skb;
754 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
755 tx_buffer_info = &tx_ring->tx_buffer_info[i];
756 cleaned = (i == eop);
757 skb = tx_buffer_info->skb;
758
759 if (cleaned && skb) {
760 unsigned int segs, bytecount;
761 unsigned int hlen = skb_headlen(skb);
762
763 /* gso_segs is currently only valid for tcp */
764 segs = skb_shinfo(skb)->gso_segs ?: 1;
765#ifdef IXGBE_FCOE
766 /* adjust for FCoE Sequence Offload */
767 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
768 && (skb->protocol == htons(ETH_P_FCOE)) &&
769 skb_is_gso(skb)) {
770 hlen = skb_transport_offset(skb) +
771 sizeof(struct fc_frame_header) +
772 sizeof(struct fcoe_crc_eof);
773 segs = DIV_ROUND_UP(skb->len - hlen,
774 skb_shinfo(skb)->gso_size);
775 }
776#endif /* IXGBE_FCOE */
777 /* multiply data chunks by size of headers */
778 bytecount = ((segs - 1) * hlen) + skb->len;
779 total_packets += segs;
780 total_bytes += bytecount;
781 }
782
783 ixgbe_unmap_and_free_tx_resource(adapter,
784 tx_buffer_info);
785
786 tx_desc->wb.status = 0;
787
788 i++;
789 if (i == tx_ring->count)
790 i = 0;
791 }
792
793 eop = tx_ring->tx_buffer_info[i].next_to_watch;
794 eop_desc = IXGBE_TX_DESC_ADV(tx_ring, eop);
795 }
796
797 tx_ring->next_to_clean = i;
798
799#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
800 if (unlikely(count && netif_carrier_ok(netdev) &&
801 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
802 /* Make sure that anybody stopping the queue after this
803 * sees the new next_to_clean.
804 */
805 smp_mb();
806 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
807 !test_bit(__IXGBE_DOWN, &adapter->state)) {
808 netif_wake_subqueue(netdev, tx_ring->queue_index);
809 ++tx_ring->restart_queue;
810 }
811 }
812
813 if (adapter->detect_tx_hung) {
814 if (ixgbe_check_tx_hang(adapter, tx_ring, i)) {
815 /* schedule immediate reset if we believe we hung */
816 e_info(probe, "tx hang %d detected, resetting "
817 "adapter\n", adapter->tx_timeout_count + 1);
818 ixgbe_tx_timeout(adapter->netdev);
819 }
820 }
821
822 /* re-arm the interrupt */
823 if (count >= tx_ring->work_limit)
824 ixgbe_irq_rearm_queues(adapter, ((u64)1 << q_vector->v_idx));
825
826 tx_ring->total_bytes += total_bytes;
827 tx_ring->total_packets += total_packets;
828 tx_ring->stats.packets += total_packets;
829 tx_ring->stats.bytes += total_bytes;
830 return (count < tx_ring->work_limit);
831}
832
833#ifdef CONFIG_IXGBE_DCA
834static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
835 struct ixgbe_ring *rx_ring)
836{
837 u32 rxctrl;
838 int cpu = get_cpu();
839 int q = rx_ring->reg_idx;
840
841 if (rx_ring->cpu != cpu) {
842 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
843 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
844 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
845 rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
846 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
847 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
848 rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
849 IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
850 }
851 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
852 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
853 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
854 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_WRO_EN |
855 IXGBE_DCA_RXCTRL_DESC_HSRO_EN);
856 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
857 rx_ring->cpu = cpu;
858 }
859 put_cpu();
860}
861
862static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
863 struct ixgbe_ring *tx_ring)
864{
865 u32 txctrl;
866 int cpu = get_cpu();
867 int q = tx_ring->reg_idx;
868 struct ixgbe_hw *hw = &adapter->hw;
869
870 if (tx_ring->cpu != cpu) {
871 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
872 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(q));
873 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
874 txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
875 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
876 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(q), txctrl);
877 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
878 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(q));
879 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
880 txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
881 IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
882 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
883 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(q), txctrl);
884 }
885 tx_ring->cpu = cpu;
886 }
887 put_cpu();
888}
889
890static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
891{
892 int i;
893
894 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
895 return;
896
897 /* always use CB2 mode, difference is masked in the CB driver */
898 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
899
900 for (i = 0; i < adapter->num_tx_queues; i++) {
901 adapter->tx_ring[i]->cpu = -1;
902 ixgbe_update_tx_dca(adapter, adapter->tx_ring[i]);
903 }
904 for (i = 0; i < adapter->num_rx_queues; i++) {
905 adapter->rx_ring[i]->cpu = -1;
906 ixgbe_update_rx_dca(adapter, adapter->rx_ring[i]);
907 }
908}
909
910static int __ixgbe_notify_dca(struct device *dev, void *data)
911{
912 struct net_device *netdev = dev_get_drvdata(dev);
913 struct ixgbe_adapter *adapter = netdev_priv(netdev);
914 unsigned long event = *(unsigned long *)data;
915
916 switch (event) {
917 case DCA_PROVIDER_ADD:
918 /* if we're already enabled, don't do it again */
919 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
920 break;
921 if (dca_add_requester(dev) == 0) {
922 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
923 ixgbe_setup_dca(adapter);
924 break;
925 }
926 /* Fall Through since DCA is disabled. */
927 case DCA_PROVIDER_REMOVE:
928 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
929 dca_remove_requester(dev);
930 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
931 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
932 }
933 break;
934 }
935
936 return 0;
937}
938
939#endif /* CONFIG_IXGBE_DCA */
940/**
941 * ixgbe_receive_skb - Send a completed packet up the stack
942 * @adapter: board private structure
943 * @skb: packet to send up
944 * @status: hardware indication of status of receive
945 * @rx_ring: rx descriptor ring (for a specific queue) to setup
946 * @rx_desc: rx descriptor
947 **/
948static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
949 struct sk_buff *skb, u8 status,
950 struct ixgbe_ring *ring,
951 union ixgbe_adv_rx_desc *rx_desc)
952{
953 struct ixgbe_adapter *adapter = q_vector->adapter;
954 struct napi_struct *napi = &q_vector->napi;
955 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
956 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
957
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 **/
977static 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
1018static 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 **/
1035static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
1036 struct ixgbe_ring *rx_ring,
1037 int cleaned_count)
1038{
1039 struct net_device *netdev = adapter->netdev;
1040 struct pci_dev *pdev = adapter->pdev;
1041 union ixgbe_adv_rx_desc *rx_desc;
1042 struct ixgbe_rx_buffer *bi;
1043 unsigned int i;
1044 unsigned int bufsz = rx_ring->rx_buf_len;
1045
1046 i = rx_ring->next_to_use;
1047 bi = &rx_ring->rx_buffer_info[i];
1048
1049 while (cleaned_count--) {
1050 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1051
1052 if (!bi->page_dma &&
1053 (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)) {
1054 if (!bi->page) {
1055 bi->page = netdev_alloc_page(netdev);
1056 if (!bi->page) {
1057 adapter->alloc_rx_page_failed++;
1058 goto no_buffers;
1059 }
1060 bi->page_offset = 0;
1061 } else {
1062 /* use a half page if we're re-using */
1063 bi->page_offset ^= (PAGE_SIZE / 2);
1064 }
1065
1066 bi->page_dma = dma_map_page(&pdev->dev, bi->page,
1067 bi->page_offset,
1068 (PAGE_SIZE / 2),
1069 DMA_FROM_DEVICE);
1070 }
1071
1072 if (!bi->skb) {
1073 struct sk_buff *skb = netdev_alloc_skb_ip_align(netdev,
1074 bufsz);
1075 bi->skb = skb;
1076
1077 if (!skb) {
1078 adapter->alloc_rx_buff_failed++;
1079 goto no_buffers;
1080 }
1081 /* initialize queue mapping */
1082 skb_record_rx_queue(skb, rx_ring->queue_index);
1083 }
1084
1085 if (!bi->dma) {
1086 bi->dma = dma_map_single(&pdev->dev,
1087 bi->skb->data,
1088 rx_ring->rx_buf_len,
1089 DMA_FROM_DEVICE);
1090 }
1091 /* Refresh the desc even if buffer_addrs didn't change because
1092 * each write-back erases this info. */
1093 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1094 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
1095 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
1096 } else {
1097 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
1098 }
1099
1100 i++;
1101 if (i == rx_ring->count)
1102 i = 0;
1103 bi = &rx_ring->rx_buffer_info[i];
1104 }
1105
1106no_buffers:
1107 if (rx_ring->next_to_use != i) {
1108 rx_ring->next_to_use = i;
1109 if (i-- == 0)
1110 i = (rx_ring->count - 1);
1111
1112 ixgbe_release_rx_desc(&adapter->hw, rx_ring, i);
1113 }
1114}
1115
1116static inline u16 ixgbe_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
1117{
1118 return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
1119}
1120
1121static inline u16 ixgbe_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
1122{
1123 return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1124}
1125
1126static inline u32 ixgbe_get_rsc_count(union ixgbe_adv_rx_desc *rx_desc)
1127{
1128 return (le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
1129 IXGBE_RXDADV_RSCCNT_MASK) >>
1130 IXGBE_RXDADV_RSCCNT_SHIFT;
1131}
1132
1133/**
1134 * ixgbe_transform_rsc_queue - change rsc queue into a full packet
1135 * @skb: pointer to the last skb in the rsc queue
1136 * @count: pointer to number of packets coalesced in this context
1137 *
1138 * This function changes a queue full of hw rsc buffers into a completed
1139 * packet. It uses the ->prev pointers to find the first packet and then
1140 * turns it into the frag list owner.
1141 **/
1142static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb,
1143 u64 *count)
1144{
1145 unsigned int frag_list_size = 0;
1146
1147 while (skb->prev) {
1148 struct sk_buff *prev = skb->prev;
1149 frag_list_size += skb->len;
1150 skb->prev = NULL;
1151 skb = prev;
1152 *count += 1;
1153 }
1154
1155 skb_shinfo(skb)->frag_list = skb->next;
1156 skb->next = NULL;
1157 skb->len += frag_list_size;
1158 skb->data_len += frag_list_size;
1159 skb->truesize += frag_list_size;
1160 return skb;
1161}
1162
1163struct ixgbe_rsc_cb {
1164 dma_addr_t dma;
1165 bool delay_unmap;
1166};
1167
1168#define IXGBE_RSC_CB(skb) ((struct ixgbe_rsc_cb *)(skb)->cb)
1169
1170static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
1171 struct ixgbe_ring *rx_ring,
1172 int *work_done, int work_to_do)
1173{
1174 struct ixgbe_adapter *adapter = q_vector->adapter;
1175 struct net_device *netdev = adapter->netdev;
1176 struct pci_dev *pdev = adapter->pdev;
1177 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
1178 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
1179 struct sk_buff *skb;
1180 unsigned int i, rsc_count = 0;
1181 u32 len, staterr;
1182 u16 hdr_info;
1183 bool cleaned = false;
1184 int cleaned_count = 0;
1185 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1186#ifdef IXGBE_FCOE
1187 int ddp_bytes = 0;
1188#endif /* IXGBE_FCOE */
1189
1190 i = rx_ring->next_to_clean;
1191 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1192 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1193 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1194
1195 while (staterr & IXGBE_RXD_STAT_DD) {
1196 u32 upper_len = 0;
1197 if (*work_done >= work_to_do)
1198 break;
1199 (*work_done)++;
1200
1201 rmb(); /* read descriptor and rx_buffer_info after status DD */
1202 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1203 hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
1204 len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
1205 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
1206 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
1207 if ((len > IXGBE_RX_HDR_SIZE) ||
1208 (upper_len && !(hdr_info & IXGBE_RXDADV_SPH)))
1209 len = IXGBE_RX_HDR_SIZE;
1210 } else {
1211 len = le16_to_cpu(rx_desc->wb.upper.length);
1212 }
1213
1214 cleaned = true;
1215 skb = rx_buffer_info->skb;
1216 prefetch(skb->data);
1217 rx_buffer_info->skb = NULL;
1218
1219 if (rx_buffer_info->dma) {
1220 if ((adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
1221 (!(staterr & IXGBE_RXD_STAT_EOP)) &&
1222 (!(skb->prev))) {
1223 /*
1224 * When HWRSC is enabled, delay unmapping
1225 * of the first packet. It carries the
1226 * header information, HW may still
1227 * access the header after the writeback.
1228 * Only unmap it when EOP is reached
1229 */
1230 IXGBE_RSC_CB(skb)->delay_unmap = true;
1231 IXGBE_RSC_CB(skb)->dma = rx_buffer_info->dma;
1232 } else {
1233 dma_unmap_single(&pdev->dev,
1234 rx_buffer_info->dma,
1235 rx_ring->rx_buf_len,
1236 DMA_FROM_DEVICE);
1237 }
1238 rx_buffer_info->dma = 0;
1239 skb_put(skb, len);
1240 }
1241
1242 if (upper_len) {
1243 dma_unmap_page(&pdev->dev, rx_buffer_info->page_dma,
1244 PAGE_SIZE / 2, DMA_FROM_DEVICE);
1245 rx_buffer_info->page_dma = 0;
1246 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
1247 rx_buffer_info->page,
1248 rx_buffer_info->page_offset,
1249 upper_len);
1250
1251 if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
1252 (page_count(rx_buffer_info->page) != 1))
1253 rx_buffer_info->page = NULL;
1254 else
1255 get_page(rx_buffer_info->page);
1256
1257 skb->len += upper_len;
1258 skb->data_len += upper_len;
1259 skb->truesize += upper_len;
1260 }
1261
1262 i++;
1263 if (i == rx_ring->count)
1264 i = 0;
1265
1266 next_rxd = IXGBE_RX_DESC_ADV(rx_ring, i);
1267 prefetch(next_rxd);
1268 cleaned_count++;
1269
1270 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
1271 rsc_count = ixgbe_get_rsc_count(rx_desc);
1272
1273 if (rsc_count) {
1274 u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
1275 IXGBE_RXDADV_NEXTP_SHIFT;
1276 next_buffer = &rx_ring->rx_buffer_info[nextp];
1277 } else {
1278 next_buffer = &rx_ring->rx_buffer_info[i];
1279 }
1280
1281 if (staterr & IXGBE_RXD_STAT_EOP) {
1282 if (skb->prev)
1283 skb = ixgbe_transform_rsc_queue(skb, &(rx_ring->rsc_count));
1284 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
1285 if (IXGBE_RSC_CB(skb)->delay_unmap) {
1286 dma_unmap_single(&pdev->dev,
1287 IXGBE_RSC_CB(skb)->dma,
1288 rx_ring->rx_buf_len,
1289 DMA_FROM_DEVICE);
1290 IXGBE_RSC_CB(skb)->dma = 0;
1291 IXGBE_RSC_CB(skb)->delay_unmap = false;
1292 }
1293 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)
1294 rx_ring->rsc_count += skb_shinfo(skb)->nr_frags;
1295 else
1296 rx_ring->rsc_count++;
1297 rx_ring->rsc_flush++;
1298 }
1299 rx_ring->stats.packets++;
1300 rx_ring->stats.bytes += skb->len;
1301 } else {
1302 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1303 rx_buffer_info->skb = next_buffer->skb;
1304 rx_buffer_info->dma = next_buffer->dma;
1305 next_buffer->skb = skb;
1306 next_buffer->dma = 0;
1307 } else {
1308 skb->next = next_buffer->skb;
1309 skb->next->prev = skb;
1310 }
1311 rx_ring->non_eop_descs++;
1312 goto next_desc;
1313 }
1314
1315 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
1316 dev_kfree_skb_irq(skb);
1317 goto next_desc;
1318 }
1319
1320 ixgbe_rx_checksum(adapter, rx_desc, skb);
1321
1322 /* probably a little skewed due to removing CRC */
1323 total_rx_bytes += skb->len;
1324 total_rx_packets++;
1325
1326 skb->protocol = eth_type_trans(skb, adapter->netdev);
1327#ifdef IXGBE_FCOE
1328 /* if ddp, not passing to ULD unless for FCP_RSP or error */
1329 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
1330 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
1331 if (!ddp_bytes)
1332 goto next_desc;
1333 }
1334#endif /* IXGBE_FCOE */
1335 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
1336
1337next_desc:
1338 rx_desc->wb.upper.status_error = 0;
1339
1340 /* return some buffers to hardware, one at a time is too slow */
1341 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
1342 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
1343 cleaned_count = 0;
1344 }
1345
1346 /* use prefetched values */
1347 rx_desc = next_rxd;
1348 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1349
1350 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1351 }
1352
1353 rx_ring->next_to_clean = i;
1354 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
1355
1356 if (cleaned_count)
1357 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
1358
1359#ifdef IXGBE_FCOE
1360 /* include DDPed FCoE data */
1361 if (ddp_bytes > 0) {
1362 unsigned int mss;
1363
1364 mss = adapter->netdev->mtu - sizeof(struct fcoe_hdr) -
1365 sizeof(struct fc_frame_header) -
1366 sizeof(struct fcoe_crc_eof);
1367 if (mss > 512)
1368 mss &= ~511;
1369 total_rx_bytes += ddp_bytes;
1370 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
1371 }
1372#endif /* IXGBE_FCOE */
1373
1374 rx_ring->total_packets += total_rx_packets;
1375 rx_ring->total_bytes += total_rx_bytes;
1376 netdev->stats.rx_bytes += total_rx_bytes;
1377 netdev->stats.rx_packets += total_rx_packets;
1378
1379 return cleaned;
1380}
1381
1382static int ixgbe_clean_rxonly(struct napi_struct *, int);
1383/**
1384 * ixgbe_configure_msix - Configure MSI-X hardware
1385 * @adapter: board private structure
1386 *
1387 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
1388 * interrupts.
1389 **/
1390static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
1391{
1392 struct ixgbe_q_vector *q_vector;
1393 int i, j, q_vectors, v_idx, r_idx;
1394 u32 mask;
1395
1396 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1397
1398 /*
1399 * Populate the IVAR table and set the ITR values to the
1400 * corresponding register.
1401 */
1402 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1403 q_vector = adapter->q_vector[v_idx];
1404 /* XXX for_each_set_bit(...) */
1405 r_idx = find_first_bit(q_vector->rxr_idx,
1406 adapter->num_rx_queues);
1407
1408 for (i = 0; i < q_vector->rxr_count; i++) {
1409 j = adapter->rx_ring[r_idx]->reg_idx;
1410 ixgbe_set_ivar(adapter, 0, j, v_idx);
1411 r_idx = find_next_bit(q_vector->rxr_idx,
1412 adapter->num_rx_queues,
1413 r_idx + 1);
1414 }
1415 r_idx = find_first_bit(q_vector->txr_idx,
1416 adapter->num_tx_queues);
1417
1418 for (i = 0; i < q_vector->txr_count; i++) {
1419 j = adapter->tx_ring[r_idx]->reg_idx;
1420 ixgbe_set_ivar(adapter, 1, j, v_idx);
1421 r_idx = find_next_bit(q_vector->txr_idx,
1422 adapter->num_tx_queues,
1423 r_idx + 1);
1424 }
1425
1426 if (q_vector->txr_count && !q_vector->rxr_count)
1427 /* tx only */
1428 q_vector->eitr = adapter->tx_eitr_param;
1429 else if (q_vector->rxr_count)
1430 /* rx or mixed */
1431 q_vector->eitr = adapter->rx_eitr_param;
1432
1433 ixgbe_write_eitr(q_vector);
1434 }
1435
1436 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
1437 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
1438 v_idx);
1439 else if (adapter->hw.mac.type == ixgbe_mac_82599EB)
1440 ixgbe_set_ivar(adapter, -1, 1, v_idx);
1441 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
1442
1443 /* set up to autoclear timer, and the vectors */
1444 mask = IXGBE_EIMS_ENABLE_MASK;
1445 if (adapter->num_vfs)
1446 mask &= ~(IXGBE_EIMS_OTHER |
1447 IXGBE_EIMS_MAILBOX |
1448 IXGBE_EIMS_LSC);
1449 else
1450 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
1451 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
1452}
1453
1454enum latency_range {
1455 lowest_latency = 0,
1456 low_latency = 1,
1457 bulk_latency = 2,
1458 latency_invalid = 255
1459};
1460
1461/**
1462 * ixgbe_update_itr - update the dynamic ITR value based on statistics
1463 * @adapter: pointer to adapter
1464 * @eitr: eitr setting (ints per sec) to give last timeslice
1465 * @itr_setting: current throttle rate in ints/second
1466 * @packets: the number of packets during this measurement interval
1467 * @bytes: the number of bytes during this measurement interval
1468 *
1469 * Stores a new ITR value based on packets and byte
1470 * counts during the last interrupt. The advantage of per interrupt
1471 * computation is faster updates and more accurate ITR for the current
1472 * traffic pattern. Constants in this function were computed
1473 * based on theoretical maximum wire speed and thresholds were set based
1474 * on testing data as well as attempting to minimize response time
1475 * while increasing bulk throughput.
1476 * this functionality is controlled by the InterruptThrottleRate module
1477 * parameter (see ixgbe_param.c)
1478 **/
1479static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
1480 u32 eitr, u8 itr_setting,
1481 int packets, int bytes)
1482{
1483 unsigned int retval = itr_setting;
1484 u32 timepassed_us;
1485 u64 bytes_perint;
1486
1487 if (packets == 0)
1488 goto update_itr_done;
1489
1490
1491 /* simple throttlerate management
1492 * 0-20MB/s lowest (100000 ints/s)
1493 * 20-100MB/s low (20000 ints/s)
1494 * 100-1249MB/s bulk (8000 ints/s)
1495 */
1496 /* what was last interrupt timeslice? */
1497 timepassed_us = 1000000/eitr;
1498 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1499
1500 switch (itr_setting) {
1501 case lowest_latency:
1502 if (bytes_perint > adapter->eitr_low)
1503 retval = low_latency;
1504 break;
1505 case low_latency:
1506 if (bytes_perint > adapter->eitr_high)
1507 retval = bulk_latency;
1508 else if (bytes_perint <= adapter->eitr_low)
1509 retval = lowest_latency;
1510 break;
1511 case bulk_latency:
1512 if (bytes_perint <= adapter->eitr_high)
1513 retval = low_latency;
1514 break;
1515 }
1516
1517update_itr_done:
1518 return retval;
1519}
1520
1521/**
1522 * ixgbe_write_eitr - write EITR register in hardware specific way
1523 * @q_vector: structure containing interrupt and ring information
1524 *
1525 * This function is made to be called by ethtool and by the driver
1526 * when it needs to update EITR registers at runtime. Hardware
1527 * specific quirks/differences are taken care of here.
1528 */
1529void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1530{
1531 struct ixgbe_adapter *adapter = q_vector->adapter;
1532 struct ixgbe_hw *hw = &adapter->hw;
1533 int v_idx = q_vector->v_idx;
1534 u32 itr_reg = EITR_INTS_PER_SEC_TO_REG(q_vector->eitr);
1535
1536 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1537 /* must write high and low 16 bits to reset counter */
1538 itr_reg |= (itr_reg << 16);
1539 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1540 /*
1541 * 82599 can support a value of zero, so allow it for
1542 * max interrupt rate, but there is an errata where it can
1543 * not be zero with RSC
1544 */
1545 if (itr_reg == 8 &&
1546 !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
1547 itr_reg = 0;
1548
1549 /*
1550 * set the WDIS bit to not clear the timer bits and cause an
1551 * immediate assertion of the interrupt
1552 */
1553 itr_reg |= IXGBE_EITR_CNT_WDIS;
1554 }
1555 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1556}
1557
1558static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
1559{
1560 struct ixgbe_adapter *adapter = q_vector->adapter;
1561 u32 new_itr;
1562 u8 current_itr, ret_itr;
1563 int i, r_idx;
1564 struct ixgbe_ring *rx_ring, *tx_ring;
1565
1566 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1567 for (i = 0; i < q_vector->txr_count; i++) {
1568 tx_ring = adapter->tx_ring[r_idx];
1569 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1570 q_vector->tx_itr,
1571 tx_ring->total_packets,
1572 tx_ring->total_bytes);
1573 /* if the result for this queue would decrease interrupt
1574 * rate for this vector then use that result */
1575 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
1576 q_vector->tx_itr - 1 : ret_itr);
1577 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1578 r_idx + 1);
1579 }
1580
1581 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1582 for (i = 0; i < q_vector->rxr_count; i++) {
1583 rx_ring = adapter->rx_ring[r_idx];
1584 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1585 q_vector->rx_itr,
1586 rx_ring->total_packets,
1587 rx_ring->total_bytes);
1588 /* if the result for this queue would decrease interrupt
1589 * rate for this vector then use that result */
1590 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
1591 q_vector->rx_itr - 1 : ret_itr);
1592 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1593 r_idx + 1);
1594 }
1595
1596 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1597
1598 switch (current_itr) {
1599 /* counts and packets in update_itr are dependent on these numbers */
1600 case lowest_latency:
1601 new_itr = 100000;
1602 break;
1603 case low_latency:
1604 new_itr = 20000; /* aka hwitr = ~200 */
1605 break;
1606 case bulk_latency:
1607 default:
1608 new_itr = 8000;
1609 break;
1610 }
1611
1612 if (new_itr != q_vector->eitr) {
1613 /* do an exponential smoothing */
1614 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1615
1616 /* save the algorithm value here, not the smoothed one */
1617 q_vector->eitr = new_itr;
1618
1619 ixgbe_write_eitr(q_vector);
1620 }
1621}
1622
1623/**
1624 * ixgbe_check_overtemp_task - worker thread to check over tempurature
1625 * @work: pointer to work_struct containing our data
1626 **/
1627static void ixgbe_check_overtemp_task(struct work_struct *work)
1628{
1629 struct ixgbe_adapter *adapter = container_of(work,
1630 struct ixgbe_adapter,
1631 check_overtemp_task);
1632 struct ixgbe_hw *hw = &adapter->hw;
1633 u32 eicr = adapter->interrupt_event;
1634
1635 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
1636 switch (hw->device_id) {
1637 case IXGBE_DEV_ID_82599_T3_LOM: {
1638 u32 autoneg;
1639 bool link_up = false;
1640
1641 if (hw->mac.ops.check_link)
1642 hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
1643
1644 if (((eicr & IXGBE_EICR_GPI_SDP0) && (!link_up)) ||
1645 (eicr & IXGBE_EICR_LSC))
1646 /* Check if this is due to overtemp */
1647 if (hw->phy.ops.check_overtemp(hw) == IXGBE_ERR_OVERTEMP)
1648 break;
1649 }
1650 return;
1651 default:
1652 if (!(eicr & IXGBE_EICR_GPI_SDP0))
1653 return;
1654 break;
1655 }
1656 e_crit(drv, "Network adapter has been stopped because it has "
1657 "over heated. Restart the computer. If the problem "
1658 "persists, power off the system and replace the "
1659 "adapter\n");
1660 /* write to clear the interrupt */
1661 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP0);
1662 }
1663}
1664
1665static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1666{
1667 struct ixgbe_hw *hw = &adapter->hw;
1668
1669 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1670 (eicr & IXGBE_EICR_GPI_SDP1)) {
1671 e_crit(probe, "Fan has stopped, replace the adapter\n");
1672 /* write to clear the interrupt */
1673 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1674 }
1675}
1676
1677static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1678{
1679 struct ixgbe_hw *hw = &adapter->hw;
1680
1681 if (eicr & IXGBE_EICR_GPI_SDP1) {
1682 /* Clear the interrupt */
1683 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1684 schedule_work(&adapter->multispeed_fiber_task);
1685 } else if (eicr & IXGBE_EICR_GPI_SDP2) {
1686 /* Clear the interrupt */
1687 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1688 schedule_work(&adapter->sfp_config_module_task);
1689 } else {
1690 /* Interrupt isn't for us... */
1691 return;
1692 }
1693}
1694
1695static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1696{
1697 struct ixgbe_hw *hw = &adapter->hw;
1698
1699 adapter->lsc_int++;
1700 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1701 adapter->link_check_timeout = jiffies;
1702 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1703 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1704 IXGBE_WRITE_FLUSH(hw);
1705 schedule_work(&adapter->watchdog_task);
1706 }
1707}
1708
1709static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1710{
1711 struct net_device *netdev = data;
1712 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1713 struct ixgbe_hw *hw = &adapter->hw;
1714 u32 eicr;
1715
1716 /*
1717 * Workaround for Silicon errata. Use clear-by-write instead
1718 * of clear-by-read. Reading with EICS will return the
1719 * interrupt causes without clearing, which later be done
1720 * with the write to EICR.
1721 */
1722 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1723 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1724
1725 if (eicr & IXGBE_EICR_LSC)
1726 ixgbe_check_lsc(adapter);
1727
1728 if (eicr & IXGBE_EICR_MAILBOX)
1729 ixgbe_msg_task(adapter);
1730
1731 if (hw->mac.type == ixgbe_mac_82598EB)
1732 ixgbe_check_fan_failure(adapter, eicr);
1733
1734 if (hw->mac.type == ixgbe_mac_82599EB) {
1735 ixgbe_check_sfp_event(adapter, eicr);
1736 adapter->interrupt_event = eicr;
1737 if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
1738 ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)))
1739 schedule_work(&adapter->check_overtemp_task);
1740
1741 /* Handle Flow Director Full threshold interrupt */
1742 if (eicr & IXGBE_EICR_FLOW_DIR) {
1743 int i;
1744 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_FLOW_DIR);
1745 /* Disable transmits before FDIR Re-initialization */
1746 netif_tx_stop_all_queues(netdev);
1747 for (i = 0; i < adapter->num_tx_queues; i++) {
1748 struct ixgbe_ring *tx_ring =
1749 adapter->tx_ring[i];
1750 if (test_and_clear_bit(__IXGBE_FDIR_INIT_DONE,
1751 &tx_ring->reinit_state))
1752 schedule_work(&adapter->fdir_reinit_task);
1753 }
1754 }
1755 }
1756 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1757 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
1758
1759 return IRQ_HANDLED;
1760}
1761
1762static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1763 u64 qmask)
1764{
1765 u32 mask;
1766
1767 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1768 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1769 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1770 } else {
1771 mask = (qmask & 0xFFFFFFFF);
1772 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(0), mask);
1773 mask = (qmask >> 32);
1774 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(1), mask);
1775 }
1776 /* skip the flush */
1777}
1778
1779static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1780 u64 qmask)
1781{
1782 u32 mask;
1783
1784 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1785 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1786 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, mask);
1787 } else {
1788 mask = (qmask & 0xFFFFFFFF);
1789 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), mask);
1790 mask = (qmask >> 32);
1791 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), mask);
1792 }
1793 /* skip the flush */
1794}
1795
1796static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
1797{
1798 struct ixgbe_q_vector *q_vector = data;
1799 struct ixgbe_adapter *adapter = q_vector->adapter;
1800 struct ixgbe_ring *tx_ring;
1801 int i, r_idx;
1802
1803 if (!q_vector->txr_count)
1804 return IRQ_HANDLED;
1805
1806 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1807 for (i = 0; i < q_vector->txr_count; i++) {
1808 tx_ring = adapter->tx_ring[r_idx];
1809 tx_ring->total_bytes = 0;
1810 tx_ring->total_packets = 0;
1811 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1812 r_idx + 1);
1813 }
1814
1815 /* EIAM disabled interrupts (on this vector) for us */
1816 napi_schedule(&q_vector->napi);
1817
1818 return IRQ_HANDLED;
1819}
1820
1821/**
1822 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
1823 * @irq: unused
1824 * @data: pointer to our q_vector struct for this interrupt vector
1825 **/
1826static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
1827{
1828 struct ixgbe_q_vector *q_vector = data;
1829 struct ixgbe_adapter *adapter = q_vector->adapter;
1830 struct ixgbe_ring *rx_ring;
1831 int r_idx;
1832 int i;
1833
1834 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1835 for (i = 0; i < q_vector->rxr_count; i++) {
1836 rx_ring = adapter->rx_ring[r_idx];
1837 rx_ring->total_bytes = 0;
1838 rx_ring->total_packets = 0;
1839 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1840 r_idx + 1);
1841 }
1842
1843 if (!q_vector->rxr_count)
1844 return IRQ_HANDLED;
1845
1846 /* disable interrupts on this vector only */
1847 /* EIAM disabled interrupts (on this vector) for us */
1848 napi_schedule(&q_vector->napi);
1849
1850 return IRQ_HANDLED;
1851}
1852
1853static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1854{
1855 struct ixgbe_q_vector *q_vector = data;
1856 struct ixgbe_adapter *adapter = q_vector->adapter;
1857 struct ixgbe_ring *ring;
1858 int r_idx;
1859 int i;
1860
1861 if (!q_vector->txr_count && !q_vector->rxr_count)
1862 return IRQ_HANDLED;
1863
1864 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1865 for (i = 0; i < q_vector->txr_count; i++) {
1866 ring = adapter->tx_ring[r_idx];
1867 ring->total_bytes = 0;
1868 ring->total_packets = 0;
1869 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1870 r_idx + 1);
1871 }
1872
1873 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1874 for (i = 0; i < q_vector->rxr_count; i++) {
1875 ring = adapter->rx_ring[r_idx];
1876 ring->total_bytes = 0;
1877 ring->total_packets = 0;
1878 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1879 r_idx + 1);
1880 }
1881
1882 /* EIAM disabled interrupts (on this vector) for us */
1883 napi_schedule(&q_vector->napi);
1884
1885 return IRQ_HANDLED;
1886}
1887
1888/**
1889 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1890 * @napi: napi struct with our devices info in it
1891 * @budget: amount of work driver is allowed to do this pass, in packets
1892 *
1893 * This function is optimized for cleaning one queue only on a single
1894 * q_vector!!!
1895 **/
1896static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1897{
1898 struct ixgbe_q_vector *q_vector =
1899 container_of(napi, struct ixgbe_q_vector, napi);
1900 struct ixgbe_adapter *adapter = q_vector->adapter;
1901 struct ixgbe_ring *rx_ring = NULL;
1902 int work_done = 0;
1903 long r_idx;
1904
1905 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1906 rx_ring = adapter->rx_ring[r_idx];
1907#ifdef CONFIG_IXGBE_DCA
1908 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1909 ixgbe_update_rx_dca(adapter, rx_ring);
1910#endif
1911
1912 ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
1913
1914 /* If all Rx work done, exit the polling mode */
1915 if (work_done < budget) {
1916 napi_complete(napi);
1917 if (adapter->rx_itr_setting & 1)
1918 ixgbe_set_itr_msix(q_vector);
1919 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1920 ixgbe_irq_enable_queues(adapter,
1921 ((u64)1 << q_vector->v_idx));
1922 }
1923
1924 return work_done;
1925}
1926
1927/**
1928 * ixgbe_clean_rxtx_many - msix (aka one shot) rx clean routine
1929 * @napi: napi struct with our devices info in it
1930 * @budget: amount of work driver is allowed to do this pass, in packets
1931 *
1932 * This function will clean more than one rx queue associated with a
1933 * q_vector.
1934 **/
1935static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
1936{
1937 struct ixgbe_q_vector *q_vector =
1938 container_of(napi, struct ixgbe_q_vector, napi);
1939 struct ixgbe_adapter *adapter = q_vector->adapter;
1940 struct ixgbe_ring *ring = NULL;
1941 int work_done = 0, i;
1942 long r_idx;
1943 bool tx_clean_complete = true;
1944
1945 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1946 for (i = 0; i < q_vector->txr_count; i++) {
1947 ring = adapter->tx_ring[r_idx];
1948#ifdef CONFIG_IXGBE_DCA
1949 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1950 ixgbe_update_tx_dca(adapter, ring);
1951#endif
1952 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
1953 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1954 r_idx + 1);
1955 }
1956
1957 /* attempt to distribute budget to each queue fairly, but don't allow
1958 * the budget to go below 1 because we'll exit polling */
1959 budget /= (q_vector->rxr_count ?: 1);
1960 budget = max(budget, 1);
1961 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1962 for (i = 0; i < q_vector->rxr_count; i++) {
1963 ring = adapter->rx_ring[r_idx];
1964#ifdef CONFIG_IXGBE_DCA
1965 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1966 ixgbe_update_rx_dca(adapter, ring);
1967#endif
1968 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
1969 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1970 r_idx + 1);
1971 }
1972
1973 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1974 ring = adapter->rx_ring[r_idx];
1975 /* If all Rx work done, exit the polling mode */
1976 if (work_done < budget) {
1977 napi_complete(napi);
1978 if (adapter->rx_itr_setting & 1)
1979 ixgbe_set_itr_msix(q_vector);
1980 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1981 ixgbe_irq_enable_queues(adapter,
1982 ((u64)1 << q_vector->v_idx));
1983 return 0;
1984 }
1985
1986 return work_done;
1987}
1988
1989/**
1990 * ixgbe_clean_txonly - msix (aka one shot) tx clean routine
1991 * @napi: napi struct with our devices info in it
1992 * @budget: amount of work driver is allowed to do this pass, in packets
1993 *
1994 * This function is optimized for cleaning one queue only on a single
1995 * q_vector!!!
1996 **/
1997static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
1998{
1999 struct ixgbe_q_vector *q_vector =
2000 container_of(napi, struct ixgbe_q_vector, napi);
2001 struct ixgbe_adapter *adapter = q_vector->adapter;
2002 struct ixgbe_ring *tx_ring = NULL;
2003 int work_done = 0;
2004 long r_idx;
2005
2006 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
2007 tx_ring = adapter->tx_ring[r_idx];
2008#ifdef CONFIG_IXGBE_DCA
2009 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2010 ixgbe_update_tx_dca(adapter, tx_ring);
2011#endif
2012
2013 if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
2014 work_done = budget;
2015
2016 /* If all Tx work done, exit the polling mode */
2017 if (work_done < budget) {
2018 napi_complete(napi);
2019 if (adapter->tx_itr_setting & 1)
2020 ixgbe_set_itr_msix(q_vector);
2021 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2022 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
2023 }
2024
2025 return work_done;
2026}
2027
2028static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
2029 int r_idx)
2030{
2031 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2032
2033 set_bit(r_idx, q_vector->rxr_idx);
2034 q_vector->rxr_count++;
2035}
2036
2037static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
2038 int t_idx)
2039{
2040 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2041
2042 set_bit(t_idx, q_vector->txr_idx);
2043 q_vector->txr_count++;
2044}
2045
2046/**
2047 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
2048 * @adapter: board private structure to initialize
2049 * @vectors: allotted vector count for descriptor rings
2050 *
2051 * This function maps descriptor rings to the queue-specific vectors
2052 * we were allotted through the MSI-X enabling code. Ideally, we'd have
2053 * one vector per ring/queue, but on a constrained vector budget, we
2054 * group the rings as "efficiently" as possible. You would add new
2055 * mapping configurations in here.
2056 **/
2057static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
2058 int vectors)
2059{
2060 int v_start = 0;
2061 int rxr_idx = 0, txr_idx = 0;
2062 int rxr_remaining = adapter->num_rx_queues;
2063 int txr_remaining = adapter->num_tx_queues;
2064 int i, j;
2065 int rqpv, tqpv;
2066 int err = 0;
2067
2068 /* No mapping required if MSI-X is disabled. */
2069 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2070 goto out;
2071
2072 /*
2073 * The ideal configuration...
2074 * We have enough vectors to map one per queue.
2075 */
2076 if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
2077 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
2078 map_vector_to_rxq(adapter, v_start, rxr_idx);
2079
2080 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
2081 map_vector_to_txq(adapter, v_start, txr_idx);
2082
2083 goto out;
2084 }
2085
2086 /*
2087 * If we don't have enough vectors for a 1-to-1
2088 * mapping, we'll have to group them so there are
2089 * multiple queues per vector.
2090 */
2091 /* Re-adjusting *qpv takes care of the remainder. */
2092 for (i = v_start; i < vectors; i++) {
2093 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
2094 for (j = 0; j < rqpv; j++) {
2095 map_vector_to_rxq(adapter, i, rxr_idx);
2096 rxr_idx++;
2097 rxr_remaining--;
2098 }
2099 }
2100 for (i = v_start; i < vectors; i++) {
2101 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
2102 for (j = 0; j < tqpv; j++) {
2103 map_vector_to_txq(adapter, i, txr_idx);
2104 txr_idx++;
2105 txr_remaining--;
2106 }
2107 }
2108
2109out:
2110 return err;
2111}
2112
2113/**
2114 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2115 * @adapter: board private structure
2116 *
2117 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2118 * interrupts from the kernel.
2119 **/
2120static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2121{
2122 struct net_device *netdev = adapter->netdev;
2123 irqreturn_t (*handler)(int, void *);
2124 int i, vector, q_vectors, err;
2125 int ri=0, ti=0;
2126
2127 /* Decrement for Other and TCP Timer vectors */
2128 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2129
2130 /* Map the Tx/Rx rings to the vectors we were allotted. */
2131 err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
2132 if (err)
2133 goto out;
2134
2135#define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
2136 (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
2137 &ixgbe_msix_clean_many)
2138 for (vector = 0; vector < q_vectors; vector++) {
2139 handler = SET_HANDLER(adapter->q_vector[vector]);
2140
2141 if(handler == &ixgbe_msix_clean_rx) {
2142 sprintf(adapter->name[vector], "%s-%s-%d",
2143 netdev->name, "rx", ri++);
2144 }
2145 else if(handler == &ixgbe_msix_clean_tx) {
2146 sprintf(adapter->name[vector], "%s-%s-%d",
2147 netdev->name, "tx", ti++);
2148 }
2149 else
2150 sprintf(adapter->name[vector], "%s-%s-%d",
2151 netdev->name, "TxRx", vector);
2152
2153 err = request_irq(adapter->msix_entries[vector].vector,
2154 handler, 0, adapter->name[vector],
2155 adapter->q_vector[vector]);
2156 if (err) {
2157 e_err(probe, "request_irq failed for MSIX interrupt "
2158 "Error: %d\n", err);
2159 goto free_queue_irqs;
2160 }
2161 }
2162
2163 sprintf(adapter->name[vector], "%s:lsc", netdev->name);
2164 err = request_irq(adapter->msix_entries[vector].vector,
2165 ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
2166 if (err) {
2167 e_err(probe, "request_irq for msix_lsc failed: %d\n", err);
2168 goto free_queue_irqs;
2169 }
2170
2171 return 0;
2172
2173free_queue_irqs:
2174 for (i = vector - 1; i >= 0; i--)
2175 free_irq(adapter->msix_entries[--vector].vector,
2176 adapter->q_vector[i]);
2177 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2178 pci_disable_msix(adapter->pdev);
2179 kfree(adapter->msix_entries);
2180 adapter->msix_entries = NULL;
2181out:
2182 return err;
2183}
2184
2185static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
2186{
2187 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2188 u8 current_itr;
2189 u32 new_itr = q_vector->eitr;
2190 struct ixgbe_ring *rx_ring = adapter->rx_ring[0];
2191 struct ixgbe_ring *tx_ring = adapter->tx_ring[0];
2192
2193 q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
2194 q_vector->tx_itr,
2195 tx_ring->total_packets,
2196 tx_ring->total_bytes);
2197 q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
2198 q_vector->rx_itr,
2199 rx_ring->total_packets,
2200 rx_ring->total_bytes);
2201
2202 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
2203
2204 switch (current_itr) {
2205 /* counts and packets in update_itr are dependent on these numbers */
2206 case lowest_latency:
2207 new_itr = 100000;
2208 break;
2209 case low_latency:
2210 new_itr = 20000; /* aka hwitr = ~200 */
2211 break;
2212 case bulk_latency:
2213 new_itr = 8000;
2214 break;
2215 default:
2216 break;
2217 }
2218
2219 if (new_itr != q_vector->eitr) {
2220 /* do an exponential smoothing */
2221 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
2222
2223 /* save the algorithm value here, not the smoothed one */
2224 q_vector->eitr = new_itr;
2225
2226 ixgbe_write_eitr(q_vector);
2227 }
2228}
2229
2230/**
2231 * ixgbe_irq_enable - Enable default interrupt generation settings
2232 * @adapter: board private structure
2233 **/
2234static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
2235{
2236 u32 mask;
2237
2238 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
2239 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
2240 mask |= IXGBE_EIMS_GPI_SDP0;
2241 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
2242 mask |= IXGBE_EIMS_GPI_SDP1;
2243 if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
2244 mask |= IXGBE_EIMS_ECC;
2245 mask |= IXGBE_EIMS_GPI_SDP1;
2246 mask |= IXGBE_EIMS_GPI_SDP2;
2247 if (adapter->num_vfs)
2248 mask |= IXGBE_EIMS_MAILBOX;
2249 }
2250 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
2251 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
2252 mask |= IXGBE_EIMS_FLOW_DIR;
2253
2254 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
2255 ixgbe_irq_enable_queues(adapter, ~0);
2256 IXGBE_WRITE_FLUSH(&adapter->hw);
2257
2258 if (adapter->num_vfs > 32) {
2259 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
2260 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
2261 }
2262}
2263
2264/**
2265 * ixgbe_intr - legacy mode Interrupt Handler
2266 * @irq: interrupt number
2267 * @data: pointer to a network interface device structure
2268 **/
2269static irqreturn_t ixgbe_intr(int irq, void *data)
2270{
2271 struct net_device *netdev = data;
2272 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2273 struct ixgbe_hw *hw = &adapter->hw;
2274 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2275 u32 eicr;
2276
2277 /*
2278 * Workaround for silicon errata. Mask the interrupts
2279 * before the read of EICR.
2280 */
2281 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2282
2283 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2284 * therefore no explict interrupt disable is necessary */
2285 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2286 if (!eicr) {
2287 /* shared interrupt alert!
2288 * make sure interrupts are enabled because the read will
2289 * have disabled interrupts due to EIAM */
2290 ixgbe_irq_enable(adapter);
2291 return IRQ_NONE; /* Not our interrupt */
2292 }
2293
2294 if (eicr & IXGBE_EICR_LSC)
2295 ixgbe_check_lsc(adapter);
2296
2297 if (hw->mac.type == ixgbe_mac_82599EB)
2298 ixgbe_check_sfp_event(adapter, eicr);
2299
2300 ixgbe_check_fan_failure(adapter, eicr);
2301 if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
2302 ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)))
2303 schedule_work(&adapter->check_overtemp_task);
2304
2305 if (napi_schedule_prep(&(q_vector->napi))) {
2306 adapter->tx_ring[0]->total_packets = 0;
2307 adapter->tx_ring[0]->total_bytes = 0;
2308 adapter->rx_ring[0]->total_packets = 0;
2309 adapter->rx_ring[0]->total_bytes = 0;
2310 /* would disable interrupts here but EIAM disabled it */
2311 __napi_schedule(&(q_vector->napi));
2312 }
2313
2314 return IRQ_HANDLED;
2315}
2316
2317static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
2318{
2319 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2320
2321 for (i = 0; i < q_vectors; i++) {
2322 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
2323 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
2324 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
2325 q_vector->rxr_count = 0;
2326 q_vector->txr_count = 0;
2327 }
2328}
2329
2330/**
2331 * ixgbe_request_irq - initialize interrupts
2332 * @adapter: board private structure
2333 *
2334 * Attempts to configure interrupts using the best available
2335 * capabilities of the hardware and kernel.
2336 **/
2337static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
2338{
2339 struct net_device *netdev = adapter->netdev;
2340 int err;
2341
2342 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2343 err = ixgbe_request_msix_irqs(adapter);
2344 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
2345 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
2346 netdev->name, netdev);
2347 } else {
2348 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
2349 netdev->name, netdev);
2350 }
2351
2352 if (err)
2353 e_err(probe, "request_irq failed, Error %d\n", err);
2354
2355 return err;
2356}
2357
2358static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
2359{
2360 struct net_device *netdev = adapter->netdev;
2361
2362 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2363 int i, q_vectors;
2364
2365 q_vectors = adapter->num_msix_vectors;
2366
2367 i = q_vectors - 1;
2368 free_irq(adapter->msix_entries[i].vector, netdev);
2369
2370 i--;
2371 for (; i >= 0; i--) {
2372 free_irq(adapter->msix_entries[i].vector,
2373 adapter->q_vector[i]);
2374 }
2375
2376 ixgbe_reset_q_vectors(adapter);
2377 } else {
2378 free_irq(adapter->pdev->irq, netdev);
2379 }
2380}
2381
2382/**
2383 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
2384 * @adapter: board private structure
2385 **/
2386static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
2387{
2388 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2389 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
2390 } else {
2391 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
2392 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
2393 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
2394 if (adapter->num_vfs > 32)
2395 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
2396 }
2397 IXGBE_WRITE_FLUSH(&adapter->hw);
2398 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2399 int i;
2400 for (i = 0; i < adapter->num_msix_vectors; i++)
2401 synchronize_irq(adapter->msix_entries[i].vector);
2402 } else {
2403 synchronize_irq(adapter->pdev->irq);
2404 }
2405}
2406
2407/**
2408 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
2409 *
2410 **/
2411static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
2412{
2413 struct ixgbe_hw *hw = &adapter->hw;
2414
2415 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
2416 EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr_param));
2417
2418 ixgbe_set_ivar(adapter, 0, 0, 0);
2419 ixgbe_set_ivar(adapter, 1, 0, 0);
2420
2421 map_vector_to_rxq(adapter, 0, 0);
2422 map_vector_to_txq(adapter, 0, 0);
2423
2424 e_info(hw, "Legacy interrupt IVAR setup done\n");
2425}
2426
2427/**
2428 * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
2429 * @adapter: board private structure
2430 * @ring: structure containing ring specific data
2431 *
2432 * Configure the Tx descriptor ring after a reset.
2433 **/
2434 static void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
2435 struct ixgbe_ring *ring)
2436{
2437 struct ixgbe_hw *hw = &adapter->hw;
2438 u64 tdba = ring->dma;
2439 int wait_loop = 10;
2440 u32 txdctl;
2441 u16 reg_idx = ring->reg_idx;
2442
2443 /* disable queue to avoid issues while updating state */
2444 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2445 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx),
2446 txdctl & ~IXGBE_TXDCTL_ENABLE);
2447 IXGBE_WRITE_FLUSH(hw);
2448
2449 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
2450 (tdba & DMA_BIT_MASK(32)));
2451 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
2452 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
2453 ring->count * sizeof(union ixgbe_adv_tx_desc));
2454 IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
2455 IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
2456 ring->head = IXGBE_TDH(reg_idx);
2457 ring->tail = IXGBE_TDT(reg_idx);
2458
2459 /* configure fetching thresholds */
2460 if (adapter->rx_itr_setting == 0) {
2461 /* cannot set wthresh when itr==0 */
2462 txdctl &= ~0x007F0000;
2463 } else {
2464 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
2465 txdctl |= (8 << 16);
2466 }
2467 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2468 /* PThresh workaround for Tx hang with DFP enabled. */
2469 txdctl |= 32;
2470 }
2471
2472 /* reinitialize flowdirector state */
2473 set_bit(__IXGBE_FDIR_INIT_DONE, &ring->reinit_state);
2474
2475 /* enable queue */
2476 txdctl |= IXGBE_TXDCTL_ENABLE;
2477 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
2478
2479 /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2480 if (hw->mac.type == ixgbe_mac_82598EB &&
2481 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2482 return;
2483
2484 /* poll to verify queue is enabled */
2485 do {
2486 msleep(1);
2487 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2488 } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
2489 if (!wait_loop)
2490 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx);
2491}
2492
2493static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
2494{
2495 struct ixgbe_hw *hw = &adapter->hw;
2496 u32 rttdcs;
2497 u32 mask;
2498
2499 if (hw->mac.type == ixgbe_mac_82598EB)
2500 return;
2501
2502 /* disable the arbiter while setting MTQC */
2503 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
2504 rttdcs |= IXGBE_RTTDCS_ARBDIS;
2505 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2506
2507 /* set transmit pool layout */
2508 mask = (IXGBE_FLAG_SRIOV_ENABLED | IXGBE_FLAG_DCB_ENABLED);
2509 switch (adapter->flags & mask) {
2510
2511 case (IXGBE_FLAG_SRIOV_ENABLED):
2512 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2513 (IXGBE_MTQC_VT_ENA | IXGBE_MTQC_64VF));
2514 break;
2515
2516 case (IXGBE_FLAG_DCB_ENABLED):
2517 /* We enable 8 traffic classes, DCB only */
2518 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2519 (IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ));
2520 break;
2521
2522 default:
2523 IXGBE_WRITE_REG(hw, IXGBE_MTQC, IXGBE_MTQC_64Q_1PB);
2524 break;
2525 }
2526
2527 /* re-enable the arbiter */
2528 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
2529 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2530}
2531
2532/**
2533 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
2534 * @adapter: board private structure
2535 *
2536 * Configure the Tx unit of the MAC after a reset.
2537 **/
2538static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
2539{
2540 struct ixgbe_hw *hw = &adapter->hw;
2541 u32 dmatxctl;
2542 u32 i;
2543
2544 ixgbe_setup_mtqc(adapter);
2545
2546 if (hw->mac.type != ixgbe_mac_82598EB) {
2547 /* DMATXCTL.EN must be before Tx queues are enabled */
2548 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2549 dmatxctl |= IXGBE_DMATXCTL_TE;
2550 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2551 }
2552
2553 /* Setup the HW Tx Head and Tail descriptor pointers */
2554 for (i = 0; i < adapter->num_tx_queues; i++)
2555 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
2556}
2557
2558#define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
2559
2560static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
2561 struct ixgbe_ring *rx_ring)
2562{
2563 u32 srrctl;
2564 int index;
2565 struct ixgbe_ring_feature *feature = adapter->ring_feature;
2566
2567 index = rx_ring->reg_idx;
2568 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2569 unsigned long mask;
2570 mask = (unsigned long) feature[RING_F_RSS].mask;
2571 index = index & mask;
2572 }
2573 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
2574
2575 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
2576 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
2577 if (adapter->num_vfs)
2578 srrctl |= IXGBE_SRRCTL_DROP_EN;
2579
2580 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
2581 IXGBE_SRRCTL_BSIZEHDR_MASK;
2582
2583 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2584#if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
2585 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2586#else
2587 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2588#endif
2589 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
2590 } else {
2591 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
2592 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2593 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
2594 }
2595
2596 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
2597}
2598
2599static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
2600{
2601 struct ixgbe_hw *hw = &adapter->hw;
2602 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2603 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2604 0x6A3E67EA, 0x14364D17, 0x3BED200D};
2605 u32 mrqc = 0, reta = 0;
2606 u32 rxcsum;
2607 int i, j;
2608 int mask;
2609
2610 /* Fill out hash function seeds */
2611 for (i = 0; i < 10; i++)
2612 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2613
2614 /* Fill out redirection table */
2615 for (i = 0, j = 0; i < 128; i++, j++) {
2616 if (j == adapter->ring_feature[RING_F_RSS].indices)
2617 j = 0;
2618 /* reta = 4-byte sliding window of
2619 * 0x00..(indices-1)(indices-1)00..etc. */
2620 reta = (reta << 8) | (j * 0x11);
2621 if ((i & 3) == 3)
2622 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2623 }
2624
2625 /* Disable indicating checksum in descriptor, enables RSS hash */
2626 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2627 rxcsum |= IXGBE_RXCSUM_PCSD;
2628 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2629
2630 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
2631 mask = adapter->flags & IXGBE_FLAG_RSS_ENABLED;
2632 else
2633 mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
2634#ifdef CONFIG_IXGBE_DCB
2635 | IXGBE_FLAG_DCB_ENABLED
2636#endif
2637 | IXGBE_FLAG_SRIOV_ENABLED
2638 );
2639
2640 switch (mask) {
2641 case (IXGBE_FLAG_RSS_ENABLED):
2642 mrqc = IXGBE_MRQC_RSSEN;
2643 break;
2644 case (IXGBE_FLAG_SRIOV_ENABLED):
2645 mrqc = IXGBE_MRQC_VMDQEN;
2646 break;
2647#ifdef CONFIG_IXGBE_DCB
2648 case (IXGBE_FLAG_DCB_ENABLED):
2649 mrqc = IXGBE_MRQC_RT8TCEN;
2650 break;
2651#endif /* CONFIG_IXGBE_DCB */
2652 default:
2653 break;
2654 }
2655
2656 /* Perform hash on these packet types */
2657 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2658 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2659 | IXGBE_MRQC_RSS_FIELD_IPV6
2660 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
2661
2662 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2663}
2664
2665/**
2666 * ixgbe_configure_rscctl - enable RSC for the indicated ring
2667 * @adapter: address of board private structure
2668 * @index: index of ring to set
2669 **/
2670static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
2671 struct ixgbe_ring *ring)
2672{
2673 struct ixgbe_hw *hw = &adapter->hw;
2674 u32 rscctrl;
2675 int rx_buf_len;
2676 u16 reg_idx = ring->reg_idx;
2677
2678 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
2679 return;
2680
2681 rx_buf_len = ring->rx_buf_len;
2682 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
2683 rscctrl |= IXGBE_RSCCTL_RSCEN;
2684 /*
2685 * we must limit the number of descriptors so that the
2686 * total size of max desc * buf_len is not greater
2687 * than 65535
2688 */
2689 if (ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2690#if (MAX_SKB_FRAGS > 16)
2691 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2692#elif (MAX_SKB_FRAGS > 8)
2693 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2694#elif (MAX_SKB_FRAGS > 4)
2695 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2696#else
2697 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2698#endif
2699 } else {
2700 if (rx_buf_len < IXGBE_RXBUFFER_4096)
2701 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2702 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
2703 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2704 else
2705 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2706 }
2707 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
2708}
2709
2710/**
2711 * ixgbe_set_uta - Set unicast filter table address
2712 * @adapter: board private structure
2713 *
2714 * The unicast table address is a register array of 32-bit registers.
2715 * The table is meant to be used in a way similar to how the MTA is used
2716 * however due to certain limitations in the hardware it is necessary to
2717 * set all the hash bits to 1 and use the VMOLR ROPE bit as a promiscuous
2718 * enable bit to allow vlan tag stripping when promiscuous mode is enabled
2719 **/
2720static void ixgbe_set_uta(struct ixgbe_adapter *adapter)
2721{
2722 struct ixgbe_hw *hw = &adapter->hw;
2723 int i;
2724
2725 /* The UTA table only exists on 82599 hardware and newer */
2726 if (hw->mac.type < ixgbe_mac_82599EB)
2727 return;
2728
2729 /* we only need to do this if VMDq is enabled */
2730 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
2731 return;
2732
2733 for (i = 0; i < 128; i++)
2734 IXGBE_WRITE_REG(hw, IXGBE_UTA(i), ~0);
2735}
2736
2737#define IXGBE_MAX_RX_DESC_POLL 10
2738static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
2739 struct ixgbe_ring *ring)
2740{
2741 struct ixgbe_hw *hw = &adapter->hw;
2742 int reg_idx = ring->reg_idx;
2743 int wait_loop = IXGBE_MAX_RX_DESC_POLL;
2744 u32 rxdctl;
2745
2746 /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2747 if (hw->mac.type == ixgbe_mac_82598EB &&
2748 !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2749 return;
2750
2751 do {
2752 msleep(1);
2753 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2754 } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
2755
2756 if (!wait_loop) {
2757 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
2758 "the polling period\n", reg_idx);
2759 }
2760}
2761
2762static void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
2763 struct ixgbe_ring *ring)
2764{
2765 struct ixgbe_hw *hw = &adapter->hw;
2766 u64 rdba = ring->dma;
2767 u32 rxdctl;
2768 u16 reg_idx = ring->reg_idx;
2769
2770 /* disable queue to avoid issues while updating state */
2771 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2772 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx),
2773 rxdctl & ~IXGBE_RXDCTL_ENABLE);
2774 IXGBE_WRITE_FLUSH(hw);
2775
2776 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
2777 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
2778 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
2779 ring->count * sizeof(union ixgbe_adv_rx_desc));
2780 IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
2781 IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
2782 ring->head = IXGBE_RDH(reg_idx);
2783 ring->tail = IXGBE_RDT(reg_idx);
2784
2785 ixgbe_configure_srrctl(adapter, ring);
2786 ixgbe_configure_rscctl(adapter, ring);
2787
2788 if (hw->mac.type == ixgbe_mac_82598EB) {
2789 /*
2790 * enable cache line friendly hardware writes:
2791 * PTHRESH=32 descriptors (half the internal cache),
2792 * this also removes ugly rx_no_buffer_count increment
2793 * HTHRESH=4 descriptors (to minimize latency on fetch)
2794 * WTHRESH=8 burst writeback up to two cache lines
2795 */
2796 rxdctl &= ~0x3FFFFF;
2797 rxdctl |= 0x080420;
2798 }
2799
2800 /* enable receive descriptor ring */
2801 rxdctl |= IXGBE_RXDCTL_ENABLE;
2802 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
2803
2804 ixgbe_rx_desc_queue_enable(adapter, ring);
2805 ixgbe_alloc_rx_buffers(adapter, ring, IXGBE_DESC_UNUSED(ring));
2806}
2807
2808static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
2809{
2810 struct ixgbe_hw *hw = &adapter->hw;
2811 int p;
2812
2813 /* PSRTYPE must be initialized in non 82598 adapters */
2814 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
2815 IXGBE_PSRTYPE_UDPHDR |
2816 IXGBE_PSRTYPE_IPV4HDR |
2817 IXGBE_PSRTYPE_L2HDR |
2818 IXGBE_PSRTYPE_IPV6HDR;
2819
2820 if (hw->mac.type == ixgbe_mac_82598EB)
2821 return;
2822
2823 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED)
2824 psrtype |= (adapter->num_rx_queues_per_pool << 29);
2825
2826 for (p = 0; p < adapter->num_rx_pools; p++)
2827 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(adapter->num_vfs + p),
2828 psrtype);
2829}
2830
2831static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
2832{
2833 struct ixgbe_hw *hw = &adapter->hw;
2834 u32 gcr_ext;
2835 u32 vt_reg_bits;
2836 u32 reg_offset, vf_shift;
2837 u32 vmdctl;
2838
2839 if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
2840 return;
2841
2842 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
2843 vt_reg_bits = IXGBE_VMD_CTL_VMDQ_EN | IXGBE_VT_CTL_REPLEN;
2844 vt_reg_bits |= (adapter->num_vfs << IXGBE_VT_CTL_POOL_SHIFT);
2845 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl | vt_reg_bits);
2846
2847 vf_shift = adapter->num_vfs % 32;
2848 reg_offset = (adapter->num_vfs > 32) ? 1 : 0;
2849
2850 /* Enable only the PF's pool for Tx/Rx */
2851 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (1 << vf_shift));
2852 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), 0);
2853 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (1 << vf_shift));
2854 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), 0);
2855 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
2856
2857 /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
2858 hw->mac.ops.set_vmdq(hw, 0, adapter->num_vfs);
2859
2860 /*
2861 * Set up VF register offsets for selected VT Mode,
2862 * i.e. 32 or 64 VFs for SR-IOV
2863 */
2864 gcr_ext = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
2865 gcr_ext |= IXGBE_GCR_EXT_MSIX_EN;
2866 gcr_ext |= IXGBE_GCR_EXT_VT_MODE_64;
2867 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
2868
2869 /* enable Tx loopback for VF/PF communication */
2870 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
2871}
2872
2873static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
2874{
2875 struct ixgbe_hw *hw = &adapter->hw;
2876 struct net_device *netdev = adapter->netdev;
2877 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2878 int rx_buf_len;
2879 struct ixgbe_ring *rx_ring;
2880 int i;
2881 u32 mhadd, hlreg0;
2882
2883 /* Decide whether to use packet split mode or not */
2884 /* Do not use packet split if we're in SR-IOV Mode */
2885 if (!adapter->num_vfs)
2886 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
2887
2888 /* Set the RX buffer length according to the mode */
2889 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
2890 rx_buf_len = IXGBE_RX_HDR_SIZE;
2891 } else {
2892 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
2893 (netdev->mtu <= ETH_DATA_LEN))
2894 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
2895 else
2896 rx_buf_len = ALIGN(max_frame + VLAN_HLEN, 1024);
2897 }
2898
2899#ifdef IXGBE_FCOE
2900 /* adjust max frame to be able to do baby jumbo for FCoE */
2901 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
2902 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
2903 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
2904
2905#endif /* IXGBE_FCOE */
2906 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
2907 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
2908 mhadd &= ~IXGBE_MHADD_MFS_MASK;
2909 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
2910
2911 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
2912 }
2913
2914 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
2915 /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
2916 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2917 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
2918
2919 /*
2920 * Setup the HW Rx Head and Tail Descriptor Pointers and
2921 * the Base and Length of the Rx Descriptor Ring
2922 */
2923 for (i = 0; i < adapter->num_rx_queues; i++) {
2924 rx_ring = adapter->rx_ring[i];
2925 rx_ring->rx_buf_len = rx_buf_len;
2926
2927 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
2928 rx_ring->flags |= IXGBE_RING_RX_PS_ENABLED;
2929 else
2930 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2931
2932#ifdef IXGBE_FCOE
2933 if (netdev->features & NETIF_F_FCOE_MTU)
2934 {
2935 struct ixgbe_ring_feature *f;
2936 f = &adapter->ring_feature[RING_F_FCOE];
2937 if ((i >= f->mask) && (i < f->mask + f->indices)) {
2938 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2939 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
2940 rx_ring->rx_buf_len =
2941 IXGBE_FCOE_JUMBO_FRAME_SIZE;
2942 }
2943 }
2944#endif /* IXGBE_FCOE */
2945 }
2946
2947}
2948
2949static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
2950{
2951 struct ixgbe_hw *hw = &adapter->hw;
2952 u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2953
2954 switch (hw->mac.type) {
2955 case ixgbe_mac_82598EB:
2956 /*
2957 * For VMDq support of different descriptor types or
2958 * buffer sizes through the use of multiple SRRCTL
2959 * registers, RDRXCTL.MVMEN must be set to 1
2960 *
2961 * also, the manual doesn't mention it clearly but DCA hints
2962 * will only use queue 0's tags unless this bit is set. Side
2963 * effects of setting this bit are only that SRRCTL must be
2964 * fully programmed [0..15]
2965 */
2966 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
2967 break;
2968 case ixgbe_mac_82599EB:
2969 /* Disable RSC for ACK packets */
2970 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
2971 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
2972 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
2973 /* hardware requires some bits to be set by default */
2974 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
2975 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
2976 break;
2977 default:
2978 /* We should do nothing since we don't know this hardware */
2979 return;
2980 }
2981
2982 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2983}
2984
2985/**
2986 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
2987 * @adapter: board private structure
2988 *
2989 * Configure the Rx unit of the MAC after a reset.
2990 **/
2991static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
2992{
2993 struct ixgbe_hw *hw = &adapter->hw;
2994 int i;
2995 u32 rxctrl;
2996
2997 /* disable receives while setting up the descriptors */
2998 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2999 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3000
3001 ixgbe_setup_psrtype(adapter);
3002 ixgbe_setup_rdrxctl(adapter);
3003
3004 /* Program registers for the distribution of queues */
3005 ixgbe_setup_mrqc(adapter);
3006 ixgbe_configure_virtualization(adapter);
3007
3008 ixgbe_set_uta(adapter);
3009
3010 /* set_rx_buffer_len must be called before ring initialization */
3011 ixgbe_set_rx_buffer_len(adapter);
3012
3013 /*
3014 * Setup the HW Rx Head and Tail Descriptor Pointers and
3015 * the Base and Length of the Rx Descriptor Ring
3016 */
3017 for (i = 0; i < adapter->num_rx_queues; i++)
3018 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
3019
3020 /* disable drop enable for 82598 parts */
3021 if (hw->mac.type == ixgbe_mac_82598EB)
3022 rxctrl |= IXGBE_RXCTRL_DMBYPS;
3023
3024 /* enable all receives */
3025 rxctrl |= IXGBE_RXCTRL_RXEN;
3026 hw->mac.ops.enable_rx_dma(hw, rxctrl);
3027}
3028
3029static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
3030{
3031 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3032 struct ixgbe_hw *hw = &adapter->hw;
3033 int pool_ndx = adapter->num_vfs;
3034
3035 /* add VID to filter table */
3036 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, true);
3037}
3038
3039static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
3040{
3041 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3042 struct ixgbe_hw *hw = &adapter->hw;
3043 int pool_ndx = adapter->num_vfs;
3044
3045 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3046 ixgbe_irq_disable(adapter);
3047
3048 vlan_group_set_device(adapter->vlgrp, vid, NULL);
3049
3050 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3051 ixgbe_irq_enable(adapter);
3052
3053 /* remove VID from filter table */
3054 hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, false);
3055}
3056
3057/**
3058 * ixgbe_vlan_filter_disable - helper to disable hw vlan filtering
3059 * @adapter: driver data
3060 */
3061static void ixgbe_vlan_filter_disable(struct ixgbe_adapter *adapter)
3062{
3063 struct ixgbe_hw *hw = &adapter->hw;
3064 u32 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3065 int i, j;
3066
3067 switch (hw->mac.type) {
3068 case ixgbe_mac_82598EB:
3069 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
3070#ifdef CONFIG_IXGBE_DCB
3071 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
3072 vlnctrl &= ~IXGBE_VLNCTRL_VME;
3073#endif
3074 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
3075 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3076 break;
3077 case ixgbe_mac_82599EB:
3078 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
3079 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
3080 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3081#ifdef CONFIG_IXGBE_DCB
3082 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
3083 break;
3084#endif
3085 for (i = 0; i < adapter->num_rx_queues; i++) {
3086 j = adapter->rx_ring[i]->reg_idx;
3087 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3088 vlnctrl &= ~IXGBE_RXDCTL_VME;
3089 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3090 }
3091 break;
3092 default:
3093 break;
3094 }
3095}
3096
3097/**
3098 * ixgbe_vlan_filter_enable - helper to enable hw vlan filtering
3099 * @adapter: driver data
3100 */
3101static void ixgbe_vlan_filter_enable(struct ixgbe_adapter *adapter)
3102{
3103 struct ixgbe_hw *hw = &adapter->hw;
3104 u32 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3105 int i, j;
3106
3107 switch (hw->mac.type) {
3108 case ixgbe_mac_82598EB:
3109 vlnctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
3110 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
3111 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3112 break;
3113 case ixgbe_mac_82599EB:
3114 vlnctrl |= IXGBE_VLNCTRL_VFE;
3115 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
3116 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3117 for (i = 0; i < adapter->num_rx_queues; i++) {
3118 j = adapter->rx_ring[i]->reg_idx;
3119 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3120 vlnctrl |= IXGBE_RXDCTL_VME;
3121 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3122 }
3123 break;
3124 default:
3125 break;
3126 }
3127}
3128
3129static void ixgbe_vlan_rx_register(struct net_device *netdev,
3130 struct vlan_group *grp)
3131{
3132 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3133
3134 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3135 ixgbe_irq_disable(adapter);
3136 adapter->vlgrp = grp;
3137
3138 /*
3139 * For a DCB driver, always enable VLAN tag stripping so we can
3140 * still receive traffic from a DCB-enabled host even if we're
3141 * not in DCB mode.
3142 */
3143 ixgbe_vlan_filter_enable(adapter);
3144
3145 ixgbe_vlan_rx_add_vid(netdev, 0);
3146
3147 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3148 ixgbe_irq_enable(adapter);
3149}
3150
3151static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
3152{
3153 ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
3154
3155 if (adapter->vlgrp) {
3156 u16 vid;
3157 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
3158 if (!vlan_group_get_device(adapter->vlgrp, vid))
3159 continue;
3160 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
3161 }
3162 }
3163}
3164
3165/**
3166 * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
3167 * @netdev: network interface device structure
3168 *
3169 * Writes unicast address list to the RAR table.
3170 * Returns: -ENOMEM on failure/insufficient address space
3171 * 0 on no addresses written
3172 * X on writing X addresses to the RAR table
3173 **/
3174static int ixgbe_write_uc_addr_list(struct net_device *netdev)
3175{
3176 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3177 struct ixgbe_hw *hw = &adapter->hw;
3178 unsigned int vfn = adapter->num_vfs;
3179 unsigned int rar_entries = hw->mac.num_rar_entries - (vfn + 1);
3180 int count = 0;
3181
3182 /* return ENOMEM indicating insufficient memory for addresses */
3183 if (netdev_uc_count(netdev) > rar_entries)
3184 return -ENOMEM;
3185
3186 if (!netdev_uc_empty(netdev) && rar_entries) {
3187 struct netdev_hw_addr *ha;
3188 /* return error if we do not support writing to RAR table */
3189 if (!hw->mac.ops.set_rar)
3190 return -ENOMEM;
3191
3192 netdev_for_each_uc_addr(ha, netdev) {
3193 if (!rar_entries)
3194 break;
3195 hw->mac.ops.set_rar(hw, rar_entries--, ha->addr,
3196 vfn, IXGBE_RAH_AV);
3197 count++;
3198 }
3199 }
3200 /* write the addresses in reverse order to avoid write combining */
3201 for (; rar_entries > 0 ; rar_entries--)
3202 hw->mac.ops.clear_rar(hw, rar_entries);
3203
3204 return count;
3205}
3206
3207/**
3208 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
3209 * @netdev: network interface device structure
3210 *
3211 * The set_rx_method entry point is called whenever the unicast/multicast
3212 * address list or the network interface flags are updated. This routine is
3213 * responsible for configuring the hardware for proper unicast, multicast and
3214 * promiscuous mode.
3215 **/
3216void ixgbe_set_rx_mode(struct net_device *netdev)
3217{
3218 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3219 struct ixgbe_hw *hw = &adapter->hw;
3220 u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
3221 int count;
3222
3223 /* Check for Promiscuous and All Multicast modes */
3224
3225 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3226
3227 /* set all bits that we expect to always be set */
3228 fctrl |= IXGBE_FCTRL_BAM;
3229 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
3230 fctrl |= IXGBE_FCTRL_PMCF;
3231
3232 /* clear the bits we are changing the status of */
3233 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3234
3235 if (netdev->flags & IFF_PROMISC) {
3236 hw->addr_ctrl.user_set_promisc = true;
3237 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3238 vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_MPE);
3239 /* don't hardware filter vlans in promisc mode */
3240 ixgbe_vlan_filter_disable(adapter);
3241 } else {
3242 if (netdev->flags & IFF_ALLMULTI) {
3243 fctrl |= IXGBE_FCTRL_MPE;
3244 vmolr |= IXGBE_VMOLR_MPE;
3245 } else {
3246 /*
3247 * Write addresses to the MTA, if the attempt fails
3248 * then we should just turn on promiscous mode so
3249 * that we can at least receive multicast traffic
3250 */
3251 hw->mac.ops.update_mc_addr_list(hw, netdev);
3252 vmolr |= IXGBE_VMOLR_ROMPE;
3253 }
3254 ixgbe_vlan_filter_enable(adapter);
3255 hw->addr_ctrl.user_set_promisc = false;
3256 /*
3257 * Write addresses to available RAR registers, if there is not
3258 * sufficient space to store all the addresses then enable
3259 * unicast promiscous mode
3260 */
3261 count = ixgbe_write_uc_addr_list(netdev);
3262 if (count < 0) {
3263 fctrl |= IXGBE_FCTRL_UPE;
3264 vmolr |= IXGBE_VMOLR_ROPE;
3265 }
3266 }
3267
3268 if (adapter->num_vfs) {
3269 ixgbe_restore_vf_multicasts(adapter);
3270 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(adapter->num_vfs)) &
3271 ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
3272 IXGBE_VMOLR_ROPE);
3273 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(adapter->num_vfs), vmolr);
3274 }
3275
3276 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
3277}
3278
3279static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
3280{
3281 int q_idx;
3282 struct ixgbe_q_vector *q_vector;
3283 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3284
3285 /* legacy and MSI only use one vector */
3286 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3287 q_vectors = 1;
3288
3289 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3290 struct napi_struct *napi;
3291 q_vector = adapter->q_vector[q_idx];
3292 napi = &q_vector->napi;
3293 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3294 if (!q_vector->rxr_count || !q_vector->txr_count) {
3295 if (q_vector->txr_count == 1)
3296 napi->poll = &ixgbe_clean_txonly;
3297 else if (q_vector->rxr_count == 1)
3298 napi->poll = &ixgbe_clean_rxonly;
3299 }
3300 }
3301
3302 napi_enable(napi);
3303 }
3304}
3305
3306static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
3307{
3308 int q_idx;
3309 struct ixgbe_q_vector *q_vector;
3310 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3311
3312 /* legacy and MSI only use one vector */
3313 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3314 q_vectors = 1;
3315
3316 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3317 q_vector = adapter->q_vector[q_idx];
3318 napi_disable(&q_vector->napi);
3319 }
3320}
3321
3322#ifdef CONFIG_IXGBE_DCB
3323/*
3324 * ixgbe_configure_dcb - Configure DCB hardware
3325 * @adapter: ixgbe adapter struct
3326 *
3327 * This is called by the driver on open to configure the DCB hardware.
3328 * This is also called by the gennetlink interface when reconfiguring
3329 * the DCB state.
3330 */
3331static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
3332{
3333 struct ixgbe_hw *hw = &adapter->hw;
3334 u32 txdctl;
3335 int i, j;
3336
3337 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
3338 if (hw->mac.type == ixgbe_mac_82598EB)
3339 netif_set_gso_max_size(adapter->netdev, 65536);
3340 return;
3341 }
3342
3343 if (hw->mac.type == ixgbe_mac_82598EB)
3344 netif_set_gso_max_size(adapter->netdev, 32768);
3345
3346 ixgbe_dcb_check_config(&adapter->dcb_cfg);
3347 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_TX_CONFIG);
3348 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_RX_CONFIG);
3349
3350 /* reconfigure the hardware */
3351 ixgbe_dcb_hw_config(&adapter->hw, &adapter->dcb_cfg);
3352
3353 for (i = 0; i < adapter->num_tx_queues; i++) {
3354 j = adapter->tx_ring[i]->reg_idx;
3355 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3356 /* PThresh workaround for Tx hang with DFP enabled. */
3357 txdctl |= 32;
3358 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
3359 }
3360 /* Enable VLAN tag insert/strip */
3361 ixgbe_vlan_filter_enable(adapter);
3362
3363 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
3364}
3365
3366#endif
3367static void ixgbe_configure(struct ixgbe_adapter *adapter)
3368{
3369 struct net_device *netdev = adapter->netdev;
3370 struct ixgbe_hw *hw = &adapter->hw;
3371 int i;
3372
3373 ixgbe_set_rx_mode(netdev);
3374
3375 ixgbe_restore_vlan(adapter);
3376#ifdef CONFIG_IXGBE_DCB
3377 ixgbe_configure_dcb(adapter);
3378#endif
3379
3380#ifdef IXGBE_FCOE
3381 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
3382 ixgbe_configure_fcoe(adapter);
3383
3384#endif /* IXGBE_FCOE */
3385 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3386 for (i = 0; i < adapter->num_tx_queues; i++)
3387 adapter->tx_ring[i]->atr_sample_rate =
3388 adapter->atr_sample_rate;
3389 ixgbe_init_fdir_signature_82599(hw, adapter->fdir_pballoc);
3390 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
3391 ixgbe_init_fdir_perfect_82599(hw, adapter->fdir_pballoc);
3392 }
3393
3394 ixgbe_configure_tx(adapter);
3395 ixgbe_configure_rx(adapter);
3396}
3397
3398static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
3399{
3400 switch (hw->phy.type) {
3401 case ixgbe_phy_sfp_avago:
3402 case ixgbe_phy_sfp_ftl:
3403 case ixgbe_phy_sfp_intel:
3404 case ixgbe_phy_sfp_unknown:
3405 case ixgbe_phy_sfp_passive_tyco:
3406 case ixgbe_phy_sfp_passive_unknown:
3407 case ixgbe_phy_sfp_active_unknown:
3408 case ixgbe_phy_sfp_ftl_active:
3409 return true;
3410 default:
3411 return false;
3412 }
3413}
3414
3415/**
3416 * ixgbe_sfp_link_config - set up SFP+ link
3417 * @adapter: pointer to private adapter struct
3418 **/
3419static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
3420{
3421 struct ixgbe_hw *hw = &adapter->hw;
3422
3423 if (hw->phy.multispeed_fiber) {
3424 /*
3425 * In multispeed fiber setups, the device may not have
3426 * had a physical connection when the driver loaded.
3427 * If that's the case, the initial link configuration
3428 * couldn't get the MAC into 10G or 1G mode, so we'll
3429 * never have a link status change interrupt fire.
3430 * We need to try and force an autonegotiation
3431 * session, then bring up link.
3432 */
3433 hw->mac.ops.setup_sfp(hw);
3434 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
3435 schedule_work(&adapter->multispeed_fiber_task);
3436 } else {
3437 /*
3438 * Direct Attach Cu and non-multispeed fiber modules
3439 * still need to be configured properly prior to
3440 * attempting link.
3441 */
3442 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_MOD_TASK))
3443 schedule_work(&adapter->sfp_config_module_task);
3444 }
3445}
3446
3447/**
3448 * ixgbe_non_sfp_link_config - set up non-SFP+ link
3449 * @hw: pointer to private hardware struct
3450 *
3451 * Returns 0 on success, negative on failure
3452 **/
3453static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
3454{
3455 u32 autoneg;
3456 bool negotiation, link_up = false;
3457 u32 ret = IXGBE_ERR_LINK_SETUP;
3458
3459 if (hw->mac.ops.check_link)
3460 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
3461
3462 if (ret)
3463 goto link_cfg_out;
3464
3465 if (hw->mac.ops.get_link_capabilities)
3466 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
3467 if (ret)
3468 goto link_cfg_out;
3469
3470 if (hw->mac.ops.setup_link)
3471 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
3472link_cfg_out:
3473 return ret;
3474}
3475
3476static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
3477{
3478 struct ixgbe_hw *hw = &adapter->hw;
3479 u32 gpie = 0;
3480
3481 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3482 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
3483 IXGBE_GPIE_OCD;
3484 gpie |= IXGBE_GPIE_EIAME;
3485 /*
3486 * use EIAM to auto-mask when MSI-X interrupt is asserted
3487 * this saves a register write for every interrupt
3488 */
3489 switch (hw->mac.type) {
3490 case ixgbe_mac_82598EB:
3491 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3492 break;
3493 default:
3494 case ixgbe_mac_82599EB:
3495 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
3496 IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
3497 break;
3498 }
3499 } else {
3500 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
3501 * specifically only auto mask tx and rx interrupts */
3502 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3503 }
3504
3505 /* XXX: to interrupt immediately for EICS writes, enable this */
3506 /* gpie |= IXGBE_GPIE_EIMEN; */
3507
3508 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3509 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
3510 gpie |= IXGBE_GPIE_VTMODE_64;
3511 }
3512
3513 /* Enable fan failure interrupt */
3514 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
3515 gpie |= IXGBE_SDP1_GPIEN;
3516
3517 if (hw->mac.type == ixgbe_mac_82599EB)
3518 gpie |= IXGBE_SDP1_GPIEN;
3519 gpie |= IXGBE_SDP2_GPIEN;
3520
3521 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3522}
3523
3524static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
3525{
3526 struct ixgbe_hw *hw = &adapter->hw;
3527 int err;
3528 u32 ctrl_ext;
3529
3530 ixgbe_get_hw_control(adapter);
3531 ixgbe_setup_gpie(adapter);
3532
3533 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3534 ixgbe_configure_msix(adapter);
3535 else
3536 ixgbe_configure_msi_and_legacy(adapter);
3537
3538 /* enable the optics */
3539 if (hw->phy.multispeed_fiber)
3540 hw->mac.ops.enable_tx_laser(hw);
3541
3542 clear_bit(__IXGBE_DOWN, &adapter->state);
3543 ixgbe_napi_enable_all(adapter);
3544
3545 /* clear any pending interrupts, may auto mask */
3546 IXGBE_READ_REG(hw, IXGBE_EICR);
3547 ixgbe_irq_enable(adapter);
3548
3549 /*
3550 * If this adapter has a fan, check to see if we had a failure
3551 * before we enabled the interrupt.
3552 */
3553 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
3554 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
3555 if (esdp & IXGBE_ESDP_SDP1)
3556 e_crit(drv, "Fan has stopped, replace the adapter\n");
3557 }
3558
3559 /*
3560 * For hot-pluggable SFP+ devices, a new SFP+ module may have
3561 * arrived before interrupts were enabled but after probe. Such
3562 * devices wouldn't have their type identified yet. We need to
3563 * kick off the SFP+ module setup first, then try to bring up link.
3564 * If we're not hot-pluggable SFP+, we just need to configure link
3565 * and bring it up.
3566 */
3567 if (hw->phy.type == ixgbe_phy_unknown) {
3568 err = hw->phy.ops.identify(hw);
3569 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
3570 /*
3571 * Take the device down and schedule the sfp tasklet
3572 * which will unregister_netdev and log it.
3573 */
3574 ixgbe_down(adapter);
3575 schedule_work(&adapter->sfp_config_module_task);
3576 return err;
3577 }
3578 }
3579
3580 if (ixgbe_is_sfp(hw)) {
3581 ixgbe_sfp_link_config(adapter);
3582 } else {
3583 err = ixgbe_non_sfp_link_config(hw);
3584 if (err)
3585 e_err(probe, "link_config FAILED %d\n", err);
3586 }
3587
3588 /* enable transmits */
3589 netif_tx_start_all_queues(adapter->netdev);
3590
3591 /* bring the link up in the watchdog, this could race with our first
3592 * link up interrupt but shouldn't be a problem */
3593 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
3594 adapter->link_check_timeout = jiffies;
3595 mod_timer(&adapter->watchdog_timer, jiffies);
3596
3597 /* Set PF Reset Done bit so PF/VF Mail Ops can work */
3598 ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
3599 ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
3600 IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
3601
3602 return 0;
3603}
3604
3605void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
3606{
3607 WARN_ON(in_interrupt());
3608 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
3609 msleep(1);
3610 ixgbe_down(adapter);
3611 /*
3612 * If SR-IOV enabled then wait a bit before bringing the adapter
3613 * back up to give the VFs time to respond to the reset. The
3614 * two second wait is based upon the watchdog timer cycle in
3615 * the VF driver.
3616 */
3617 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3618 msleep(2000);
3619 ixgbe_up(adapter);
3620 clear_bit(__IXGBE_RESETTING, &adapter->state);
3621}
3622
3623int ixgbe_up(struct ixgbe_adapter *adapter)
3624{
3625 /* hardware has been reset, we need to reload some things */
3626 ixgbe_configure(adapter);
3627
3628 return ixgbe_up_complete(adapter);
3629}
3630
3631void ixgbe_reset(struct ixgbe_adapter *adapter)
3632{
3633 struct ixgbe_hw *hw = &adapter->hw;
3634 int err;
3635
3636 err = hw->mac.ops.init_hw(hw);
3637 switch (err) {
3638 case 0:
3639 case IXGBE_ERR_SFP_NOT_PRESENT:
3640 break;
3641 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
3642 e_dev_err("master disable timed out\n");
3643 break;
3644 case IXGBE_ERR_EEPROM_VERSION:
3645 /* We are running on a pre-production device, log a warning */
3646 e_dev_warn("This device is a pre-production adapter/LOM. "
3647 "Please be aware there may be issuesassociated with "
3648 "your hardware. If you are experiencing problems "
3649 "please contact your Intel or hardware "
3650 "representative who provided you with this "
3651 "hardware.\n");
3652 break;
3653 default:
3654 e_dev_err("Hardware Error: %d\n", err);
3655 }
3656
3657 /* reprogram the RAR[0] in case user changed it. */
3658 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
3659 IXGBE_RAH_AV);
3660}
3661
3662/**
3663 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
3664 * @adapter: board private structure
3665 * @rx_ring: ring to free buffers from
3666 **/
3667static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
3668 struct ixgbe_ring *rx_ring)
3669{
3670 struct pci_dev *pdev = adapter->pdev;
3671 unsigned long size;
3672 unsigned int i;
3673
3674 /* Free all the Rx ring sk_buffs */
3675
3676 for (i = 0; i < rx_ring->count; i++) {
3677 struct ixgbe_rx_buffer *rx_buffer_info;
3678
3679 rx_buffer_info = &rx_ring->rx_buffer_info[i];
3680 if (rx_buffer_info->dma) {
3681 dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
3682 rx_ring->rx_buf_len,
3683 DMA_FROM_DEVICE);
3684 rx_buffer_info->dma = 0;
3685 }
3686 if (rx_buffer_info->skb) {
3687 struct sk_buff *skb = rx_buffer_info->skb;
3688 rx_buffer_info->skb = NULL;
3689 do {
3690 struct sk_buff *this = skb;
3691 if (IXGBE_RSC_CB(this)->delay_unmap) {
3692 dma_unmap_single(&pdev->dev,
3693 IXGBE_RSC_CB(this)->dma,
3694 rx_ring->rx_buf_len,
3695 DMA_FROM_DEVICE);
3696 IXGBE_RSC_CB(this)->dma = 0;
3697 IXGBE_RSC_CB(skb)->delay_unmap = false;
3698 }
3699 skb = skb->prev;
3700 dev_kfree_skb(this);
3701 } while (skb);
3702 }
3703 if (!rx_buffer_info->page)
3704 continue;
3705 if (rx_buffer_info->page_dma) {
3706 dma_unmap_page(&pdev->dev, rx_buffer_info->page_dma,
3707 PAGE_SIZE / 2, DMA_FROM_DEVICE);
3708 rx_buffer_info->page_dma = 0;
3709 }
3710 put_page(rx_buffer_info->page);
3711 rx_buffer_info->page = NULL;
3712 rx_buffer_info->page_offset = 0;
3713 }
3714
3715 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
3716 memset(rx_ring->rx_buffer_info, 0, size);
3717
3718 /* Zero out the descriptor ring */
3719 memset(rx_ring->desc, 0, rx_ring->size);
3720
3721 rx_ring->next_to_clean = 0;
3722 rx_ring->next_to_use = 0;
3723
3724 if (rx_ring->head)
3725 writel(0, adapter->hw.hw_addr + rx_ring->head);
3726 if (rx_ring->tail)
3727 writel(0, adapter->hw.hw_addr + rx_ring->tail);
3728}
3729
3730/**
3731 * ixgbe_clean_tx_ring - Free Tx Buffers
3732 * @adapter: board private structure
3733 * @tx_ring: ring to be cleaned
3734 **/
3735static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
3736 struct ixgbe_ring *tx_ring)
3737{
3738 struct ixgbe_tx_buffer *tx_buffer_info;
3739 unsigned long size;
3740 unsigned int i;
3741
3742 /* Free all the Tx ring sk_buffs */
3743
3744 for (i = 0; i < tx_ring->count; i++) {
3745 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3746 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
3747 }
3748
3749 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
3750 memset(tx_ring->tx_buffer_info, 0, size);
3751
3752 /* Zero out the descriptor ring */
3753 memset(tx_ring->desc, 0, tx_ring->size);
3754
3755 tx_ring->next_to_use = 0;
3756 tx_ring->next_to_clean = 0;
3757
3758 if (tx_ring->head)
3759 writel(0, adapter->hw.hw_addr + tx_ring->head);
3760 if (tx_ring->tail)
3761 writel(0, adapter->hw.hw_addr + tx_ring->tail);
3762}
3763
3764/**
3765 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
3766 * @adapter: board private structure
3767 **/
3768static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
3769{
3770 int i;
3771
3772 for (i = 0; i < adapter->num_rx_queues; i++)
3773 ixgbe_clean_rx_ring(adapter, adapter->rx_ring[i]);
3774}
3775
3776/**
3777 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
3778 * @adapter: board private structure
3779 **/
3780static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
3781{
3782 int i;
3783
3784 for (i = 0; i < adapter->num_tx_queues; i++)
3785 ixgbe_clean_tx_ring(adapter, adapter->tx_ring[i]);
3786}
3787
3788void ixgbe_down(struct ixgbe_adapter *adapter)
3789{
3790 struct net_device *netdev = adapter->netdev;
3791 struct ixgbe_hw *hw = &adapter->hw;
3792 u32 rxctrl;
3793 u32 txdctl;
3794 int i, j;
3795
3796 /* signal that we are down to the interrupt handler */
3797 set_bit(__IXGBE_DOWN, &adapter->state);
3798
3799 /* disable receive for all VFs and wait one second */
3800 if (adapter->num_vfs) {
3801 /* ping all the active vfs to let them know we are going down */
3802 ixgbe_ping_all_vfs(adapter);
3803
3804 /* Disable all VFTE/VFRE TX/RX */
3805 ixgbe_disable_tx_rx(adapter);
3806
3807 /* Mark all the VFs as inactive */
3808 for (i = 0 ; i < adapter->num_vfs; i++)
3809 adapter->vfinfo[i].clear_to_send = 0;
3810 }
3811
3812 /* disable receives */
3813 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3814 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3815
3816 IXGBE_WRITE_FLUSH(hw);
3817 msleep(10);
3818
3819 netif_tx_stop_all_queues(netdev);
3820
3821 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3822 del_timer_sync(&adapter->sfp_timer);
3823 del_timer_sync(&adapter->watchdog_timer);
3824 cancel_work_sync(&adapter->watchdog_task);
3825
3826 netif_carrier_off(netdev);
3827 netif_tx_disable(netdev);
3828
3829 ixgbe_irq_disable(adapter);
3830
3831 ixgbe_napi_disable_all(adapter);
3832
3833 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3834 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
3835 cancel_work_sync(&adapter->fdir_reinit_task);
3836
3837 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
3838 cancel_work_sync(&adapter->check_overtemp_task);
3839
3840 /* disable transmits in the hardware now that interrupts are off */
3841 for (i = 0; i < adapter->num_tx_queues; i++) {
3842 j = adapter->tx_ring[i]->reg_idx;
3843 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3844 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
3845 (txdctl & ~IXGBE_TXDCTL_ENABLE));
3846 }
3847 /* Disable the Tx DMA engine on 82599 */
3848 if (hw->mac.type == ixgbe_mac_82599EB)
3849 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
3850 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
3851 ~IXGBE_DMATXCTL_TE));
3852
3853 /* power down the optics */
3854 if (hw->phy.multispeed_fiber)
3855 hw->mac.ops.disable_tx_laser(hw);
3856
3857 /* clear n-tuple filters that are cached */
3858 ethtool_ntuple_flush(netdev);
3859
3860 if (!pci_channel_offline(adapter->pdev))
3861 ixgbe_reset(adapter);
3862 ixgbe_clean_all_tx_rings(adapter);
3863 ixgbe_clean_all_rx_rings(adapter);
3864
3865#ifdef CONFIG_IXGBE_DCA
3866 /* since we reset the hardware DCA settings were cleared */
3867 ixgbe_setup_dca(adapter);
3868#endif
3869}
3870
3871/**
3872 * ixgbe_poll - NAPI Rx polling callback
3873 * @napi: structure for representing this polling device
3874 * @budget: how many packets driver is allowed to clean
3875 *
3876 * This function is used for legacy and MSI, NAPI mode
3877 **/
3878static int ixgbe_poll(struct napi_struct *napi, int budget)
3879{
3880 struct ixgbe_q_vector *q_vector =
3881 container_of(napi, struct ixgbe_q_vector, napi);
3882 struct ixgbe_adapter *adapter = q_vector->adapter;
3883 int tx_clean_complete, work_done = 0;
3884
3885#ifdef CONFIG_IXGBE_DCA
3886 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
3887 ixgbe_update_tx_dca(adapter, adapter->tx_ring[0]);
3888 ixgbe_update_rx_dca(adapter, adapter->rx_ring[0]);
3889 }
3890#endif
3891
3892 tx_clean_complete = ixgbe_clean_tx_irq(q_vector, adapter->tx_ring[0]);
3893 ixgbe_clean_rx_irq(q_vector, adapter->rx_ring[0], &work_done, budget);
3894
3895 if (!tx_clean_complete)
3896 work_done = budget;
3897
3898 /* If budget not fully consumed, exit the polling mode */
3899 if (work_done < budget) {
3900 napi_complete(napi);
3901 if (adapter->rx_itr_setting & 1)
3902 ixgbe_set_itr(adapter);
3903 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3904 ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
3905 }
3906 return work_done;
3907}
3908
3909/**
3910 * ixgbe_tx_timeout - Respond to a Tx Hang
3911 * @netdev: network interface device structure
3912 **/
3913static void ixgbe_tx_timeout(struct net_device *netdev)
3914{
3915 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3916
3917 /* Do the reset outside of interrupt context */
3918 schedule_work(&adapter->reset_task);
3919}
3920
3921static void ixgbe_reset_task(struct work_struct *work)
3922{
3923 struct ixgbe_adapter *adapter;
3924 adapter = container_of(work, struct ixgbe_adapter, reset_task);
3925
3926 /* If we're already down or resetting, just bail */
3927 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
3928 test_bit(__IXGBE_RESETTING, &adapter->state))
3929 return;
3930
3931 adapter->tx_timeout_count++;
3932
3933 ixgbe_dump(adapter);
3934 netdev_err(adapter->netdev, "Reset adapter\n");
3935 ixgbe_reinit_locked(adapter);
3936}
3937
3938#ifdef CONFIG_IXGBE_DCB
3939static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
3940{
3941 bool ret = false;
3942 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_DCB];
3943
3944 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
3945 return ret;
3946
3947 f->mask = 0x7 << 3;
3948 adapter->num_rx_queues = f->indices;
3949 adapter->num_tx_queues = f->indices;
3950 ret = true;
3951
3952 return ret;
3953}
3954#endif
3955
3956/**
3957 * ixgbe_set_rss_queues: Allocate queues for RSS
3958 * @adapter: board private structure to initialize
3959 *
3960 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
3961 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
3962 *
3963 **/
3964static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
3965{
3966 bool ret = false;
3967 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
3968
3969 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3970 f->mask = 0xF;
3971 adapter->num_rx_queues = f->indices;
3972 adapter->num_tx_queues = f->indices;
3973 ret = true;
3974 } else {
3975 ret = false;
3976 }
3977
3978 return ret;
3979}
3980
3981/**
3982 * ixgbe_set_fdir_queues: Allocate queues for Flow Director
3983 * @adapter: board private structure to initialize
3984 *
3985 * Flow Director is an advanced Rx filter, attempting to get Rx flows back
3986 * to the original CPU that initiated the Tx session. This runs in addition
3987 * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
3988 * Rx load across CPUs using RSS.
3989 *
3990 **/
3991static bool inline ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
3992{
3993 bool ret = false;
3994 struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
3995
3996 f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
3997 f_fdir->mask = 0;
3998
3999 /* Flow Director must have RSS enabled */
4000 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
4001 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
4002 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)))) {
4003 adapter->num_tx_queues = f_fdir->indices;
4004 adapter->num_rx_queues = f_fdir->indices;
4005 ret = true;
4006 } else {
4007 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4008 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4009 }
4010 return ret;
4011}
4012
4013#ifdef IXGBE_FCOE
4014/**
4015 * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
4016 * @adapter: board private structure to initialize
4017 *
4018 * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
4019 * The ring feature mask is not used as a mask for FCoE, as it can take any 8
4020 * rx queues out of the max number of rx queues, instead, it is used as the
4021 * index of the first rx queue used by FCoE.
4022 *
4023 **/
4024static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
4025{
4026 bool ret = false;
4027 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4028
4029 f->indices = min((int)num_online_cpus(), f->indices);
4030 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
4031 adapter->num_rx_queues = 1;
4032 adapter->num_tx_queues = 1;
4033#ifdef CONFIG_IXGBE_DCB
4034 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4035 e_info(probe, "FCoE enabled with DCB\n");
4036 ixgbe_set_dcb_queues(adapter);
4037 }
4038#endif
4039 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4040 e_info(probe, "FCoE enabled with RSS\n");
4041 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4042 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
4043 ixgbe_set_fdir_queues(adapter);
4044 else
4045 ixgbe_set_rss_queues(adapter);
4046 }
4047 /* adding FCoE rx rings to the end */
4048 f->mask = adapter->num_rx_queues;
4049 adapter->num_rx_queues += f->indices;
4050 adapter->num_tx_queues += f->indices;
4051
4052 ret = true;
4053 }
4054
4055 return ret;
4056}
4057
4058#endif /* IXGBE_FCOE */
4059/**
4060 * ixgbe_set_sriov_queues: Allocate queues for IOV use
4061 * @adapter: board private structure to initialize
4062 *
4063 * IOV doesn't actually use anything, so just NAK the
4064 * request for now and let the other queue routines
4065 * figure out what to do.
4066 */
4067static inline bool ixgbe_set_sriov_queues(struct ixgbe_adapter *adapter)
4068{
4069 return false;
4070}
4071
4072/*
4073 * ixgbe_set_num_queues: Allocate queues for device, feature dependant
4074 * @adapter: board private structure to initialize
4075 *
4076 * This is the top level queue allocation routine. The order here is very
4077 * important, starting with the "most" number of features turned on at once,
4078 * and ending with the smallest set of features. This way large combinations
4079 * can be allocated if they're turned on, and smaller combinations are the
4080 * fallthrough conditions.
4081 *
4082 **/
4083static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
4084{
4085 /* Start with base case */
4086 adapter->num_rx_queues = 1;
4087 adapter->num_tx_queues = 1;
4088 adapter->num_rx_pools = adapter->num_rx_queues;
4089 adapter->num_rx_queues_per_pool = 1;
4090
4091 if (ixgbe_set_sriov_queues(adapter))
4092 return;
4093
4094#ifdef IXGBE_FCOE
4095 if (ixgbe_set_fcoe_queues(adapter))
4096 goto done;
4097
4098#endif /* IXGBE_FCOE */
4099#ifdef CONFIG_IXGBE_DCB
4100 if (ixgbe_set_dcb_queues(adapter))
4101 goto done;
4102
4103#endif
4104 if (ixgbe_set_fdir_queues(adapter))
4105 goto done;
4106
4107 if (ixgbe_set_rss_queues(adapter))
4108 goto done;
4109
4110 /* fallback to base case */
4111 adapter->num_rx_queues = 1;
4112 adapter->num_tx_queues = 1;
4113
4114done:
4115 /* Notify the stack of the (possibly) reduced Tx Queue count. */
4116 netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
4117}
4118
4119static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
4120 int vectors)
4121{
4122 int err, vector_threshold;
4123
4124 /* We'll want at least 3 (vector_threshold):
4125 * 1) TxQ[0] Cleanup
4126 * 2) RxQ[0] Cleanup
4127 * 3) Other (Link Status Change, etc.)
4128 * 4) TCP Timer (optional)
4129 */
4130 vector_threshold = MIN_MSIX_COUNT;
4131
4132 /* The more we get, the more we will assign to Tx/Rx Cleanup
4133 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
4134 * Right now, we simply care about how many we'll get; we'll
4135 * set them up later while requesting irq's.
4136 */
4137 while (vectors >= vector_threshold) {
4138 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
4139 vectors);
4140 if (!err) /* Success in acquiring all requested vectors. */
4141 break;
4142 else if (err < 0)
4143 vectors = 0; /* Nasty failure, quit now */
4144 else /* err == number of vectors we should try again with */
4145 vectors = err;
4146 }
4147
4148 if (vectors < vector_threshold) {
4149 /* Can't allocate enough MSI-X interrupts? Oh well.
4150 * This just means we'll go with either a single MSI
4151 * vector or fall back to legacy interrupts.
4152 */
4153 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4154 "Unable to allocate MSI-X interrupts\n");
4155 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4156 kfree(adapter->msix_entries);
4157 adapter->msix_entries = NULL;
4158 } else {
4159 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
4160 /*
4161 * Adjust for only the vectors we'll use, which is minimum
4162 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
4163 * vectors we were allocated.
4164 */
4165 adapter->num_msix_vectors = min(vectors,
4166 adapter->max_msix_q_vectors + NON_Q_VECTORS);
4167 }
4168}
4169
4170/**
4171 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
4172 * @adapter: board private structure to initialize
4173 *
4174 * Cache the descriptor ring offsets for RSS to the assigned rings.
4175 *
4176 **/
4177static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
4178{
4179 int i;
4180 bool ret = false;
4181
4182 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4183 for (i = 0; i < adapter->num_rx_queues; i++)
4184 adapter->rx_ring[i]->reg_idx = i;
4185 for (i = 0; i < adapter->num_tx_queues; i++)
4186 adapter->tx_ring[i]->reg_idx = i;
4187 ret = true;
4188 } else {
4189 ret = false;
4190 }
4191
4192 return ret;
4193}
4194
4195#ifdef CONFIG_IXGBE_DCB
4196/**
4197 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
4198 * @adapter: board private structure to initialize
4199 *
4200 * Cache the descriptor ring offsets for DCB to the assigned rings.
4201 *
4202 **/
4203static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
4204{
4205 int i;
4206 bool ret = false;
4207 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
4208
4209 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4210 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
4211 /* the number of queues is assumed to be symmetric */
4212 for (i = 0; i < dcb_i; i++) {
4213 adapter->rx_ring[i]->reg_idx = i << 3;
4214 adapter->tx_ring[i]->reg_idx = i << 2;
4215 }
4216 ret = true;
4217 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
4218 if (dcb_i == 8) {
4219 /*
4220 * Tx TC0 starts at: descriptor queue 0
4221 * Tx TC1 starts at: descriptor queue 32
4222 * Tx TC2 starts at: descriptor queue 64
4223 * Tx TC3 starts at: descriptor queue 80
4224 * Tx TC4 starts at: descriptor queue 96
4225 * Tx TC5 starts at: descriptor queue 104
4226 * Tx TC6 starts at: descriptor queue 112
4227 * Tx TC7 starts at: descriptor queue 120
4228 *
4229 * Rx TC0-TC7 are offset by 16 queues each
4230 */
4231 for (i = 0; i < 3; i++) {
4232 adapter->tx_ring[i]->reg_idx = i << 5;
4233 adapter->rx_ring[i]->reg_idx = i << 4;
4234 }
4235 for ( ; i < 5; i++) {
4236 adapter->tx_ring[i]->reg_idx =
4237 ((i + 2) << 4);
4238 adapter->rx_ring[i]->reg_idx = i << 4;
4239 }
4240 for ( ; i < dcb_i; i++) {
4241 adapter->tx_ring[i]->reg_idx =
4242 ((i + 8) << 3);
4243 adapter->rx_ring[i]->reg_idx = i << 4;
4244 }
4245
4246 ret = true;
4247 } else if (dcb_i == 4) {
4248 /*
4249 * Tx TC0 starts at: descriptor queue 0
4250 * Tx TC1 starts at: descriptor queue 64
4251 * Tx TC2 starts at: descriptor queue 96
4252 * Tx TC3 starts at: descriptor queue 112
4253 *
4254 * Rx TC0-TC3 are offset by 32 queues each
4255 */
4256 adapter->tx_ring[0]->reg_idx = 0;
4257 adapter->tx_ring[1]->reg_idx = 64;
4258 adapter->tx_ring[2]->reg_idx = 96;
4259 adapter->tx_ring[3]->reg_idx = 112;
4260 for (i = 0 ; i < dcb_i; i++)
4261 adapter->rx_ring[i]->reg_idx = i << 5;
4262
4263 ret = true;
4264 } else {
4265 ret = false;
4266 }
4267 } else {
4268 ret = false;
4269 }
4270 } else {
4271 ret = false;
4272 }
4273
4274 return ret;
4275}
4276#endif
4277
4278/**
4279 * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
4280 * @adapter: board private structure to initialize
4281 *
4282 * Cache the descriptor ring offsets for Flow Director to the assigned rings.
4283 *
4284 **/
4285static bool inline ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
4286{
4287 int i;
4288 bool ret = false;
4289
4290 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
4291 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4292 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))) {
4293 for (i = 0; i < adapter->num_rx_queues; i++)
4294 adapter->rx_ring[i]->reg_idx = i;
4295 for (i = 0; i < adapter->num_tx_queues; i++)
4296 adapter->tx_ring[i]->reg_idx = i;
4297 ret = true;
4298 }
4299
4300 return ret;
4301}
4302
4303#ifdef IXGBE_FCOE
4304/**
4305 * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
4306 * @adapter: board private structure to initialize
4307 *
4308 * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
4309 *
4310 */
4311static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
4312{
4313 int i, fcoe_rx_i = 0, fcoe_tx_i = 0;
4314 bool ret = false;
4315 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4316
4317 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
4318#ifdef CONFIG_IXGBE_DCB
4319 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4320 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
4321
4322 ixgbe_cache_ring_dcb(adapter);
4323 /* find out queues in TC for FCoE */
4324 fcoe_rx_i = adapter->rx_ring[fcoe->tc]->reg_idx + 1;
4325 fcoe_tx_i = adapter->tx_ring[fcoe->tc]->reg_idx + 1;
4326 /*
4327 * In 82599, the number of Tx queues for each traffic
4328 * class for both 8-TC and 4-TC modes are:
4329 * TCs : TC0 TC1 TC2 TC3 TC4 TC5 TC6 TC7
4330 * 8 TCs: 32 32 16 16 8 8 8 8
4331 * 4 TCs: 64 64 32 32
4332 * We have max 8 queues for FCoE, where 8 the is
4333 * FCoE redirection table size. If TC for FCoE is
4334 * less than or equal to TC3, we have enough queues
4335 * to add max of 8 queues for FCoE, so we start FCoE
4336 * tx descriptor from the next one, i.e., reg_idx + 1.
4337 * If TC for FCoE is above TC3, implying 8 TC mode,
4338 * and we need 8 for FCoE, we have to take all queues
4339 * in that traffic class for FCoE.
4340 */
4341 if ((f->indices == IXGBE_FCRETA_SIZE) && (fcoe->tc > 3))
4342 fcoe_tx_i--;
4343 }
4344#endif /* CONFIG_IXGBE_DCB */
4345 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4346 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4347 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
4348 ixgbe_cache_ring_fdir(adapter);
4349 else
4350 ixgbe_cache_ring_rss(adapter);
4351
4352 fcoe_rx_i = f->mask;
4353 fcoe_tx_i = f->mask;
4354 }
4355 for (i = 0; i < f->indices; i++, fcoe_rx_i++, fcoe_tx_i++) {
4356 adapter->rx_ring[f->mask + i]->reg_idx = fcoe_rx_i;
4357 adapter->tx_ring[f->mask + i]->reg_idx = fcoe_tx_i;
4358 }
4359 ret = true;
4360 }
4361 return ret;
4362}
4363
4364#endif /* IXGBE_FCOE */
4365/**
4366 * ixgbe_cache_ring_sriov - Descriptor ring to register mapping for sriov
4367 * @adapter: board private structure to initialize
4368 *
4369 * SR-IOV doesn't use any descriptor rings but changes the default if
4370 * no other mapping is used.
4371 *
4372 */
4373static inline bool ixgbe_cache_ring_sriov(struct ixgbe_adapter *adapter)
4374{
4375 adapter->rx_ring[0]->reg_idx = adapter->num_vfs * 2;
4376 adapter->tx_ring[0]->reg_idx = adapter->num_vfs * 2;
4377 if (adapter->num_vfs)
4378 return true;
4379 else
4380 return false;
4381}
4382
4383/**
4384 * ixgbe_cache_ring_register - Descriptor ring to register mapping
4385 * @adapter: board private structure to initialize
4386 *
4387 * Once we know the feature-set enabled for the device, we'll cache
4388 * the register offset the descriptor ring is assigned to.
4389 *
4390 * Note, the order the various feature calls is important. It must start with
4391 * the "most" features enabled at the same time, then trickle down to the
4392 * least amount of features turned on at once.
4393 **/
4394static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
4395{
4396 /* start with default case */
4397 adapter->rx_ring[0]->reg_idx = 0;
4398 adapter->tx_ring[0]->reg_idx = 0;
4399
4400 if (ixgbe_cache_ring_sriov(adapter))
4401 return;
4402
4403#ifdef IXGBE_FCOE
4404 if (ixgbe_cache_ring_fcoe(adapter))
4405 return;
4406
4407#endif /* IXGBE_FCOE */
4408#ifdef CONFIG_IXGBE_DCB
4409 if (ixgbe_cache_ring_dcb(adapter))
4410 return;
4411
4412#endif
4413 if (ixgbe_cache_ring_fdir(adapter))
4414 return;
4415
4416 if (ixgbe_cache_ring_rss(adapter))
4417 return;
4418}
4419
4420/**
4421 * ixgbe_alloc_queues - Allocate memory for all rings
4422 * @adapter: board private structure to initialize
4423 *
4424 * We allocate one ring per queue at run-time since we don't know the
4425 * number of queues at compile-time. The polling_netdev array is
4426 * intended for Multiqueue, but should work fine with a single queue.
4427 **/
4428static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
4429{
4430 int i;
4431 int orig_node = adapter->node;
4432
4433 for (i = 0; i < adapter->num_tx_queues; i++) {
4434 struct ixgbe_ring *ring = adapter->tx_ring[i];
4435 if (orig_node == -1) {
4436 int cur_node = next_online_node(adapter->node);
4437 if (cur_node == MAX_NUMNODES)
4438 cur_node = first_online_node;
4439 adapter->node = cur_node;
4440 }
4441 ring = kzalloc_node(sizeof(struct ixgbe_ring), GFP_KERNEL,
4442 adapter->node);
4443 if (!ring)
4444 ring = kzalloc(sizeof(struct ixgbe_ring), GFP_KERNEL);
4445 if (!ring)
4446 goto err_tx_ring_allocation;
4447 ring->count = adapter->tx_ring_count;
4448 ring->queue_index = i;
4449 ring->numa_node = adapter->node;
4450
4451 adapter->tx_ring[i] = ring;
4452 }
4453
4454 /* Restore the adapter's original node */
4455 adapter->node = orig_node;
4456
4457 for (i = 0; i < adapter->num_rx_queues; i++) {
4458 struct ixgbe_ring *ring = adapter->rx_ring[i];
4459 if (orig_node == -1) {
4460 int cur_node = next_online_node(adapter->node);
4461 if (cur_node == MAX_NUMNODES)
4462 cur_node = first_online_node;
4463 adapter->node = cur_node;
4464 }
4465 ring = kzalloc_node(sizeof(struct ixgbe_ring), GFP_KERNEL,
4466 adapter->node);
4467 if (!ring)
4468 ring = kzalloc(sizeof(struct ixgbe_ring), GFP_KERNEL);
4469 if (!ring)
4470 goto err_rx_ring_allocation;
4471 ring->count = adapter->rx_ring_count;
4472 ring->queue_index = i;
4473 ring->numa_node = adapter->node;
4474
4475 adapter->rx_ring[i] = ring;
4476 }
4477
4478 /* Restore the adapter's original node */
4479 adapter->node = orig_node;
4480
4481 ixgbe_cache_ring_register(adapter);
4482
4483 return 0;
4484
4485err_rx_ring_allocation:
4486 for (i = 0; i < adapter->num_tx_queues; i++)
4487 kfree(adapter->tx_ring[i]);
4488err_tx_ring_allocation:
4489 return -ENOMEM;
4490}
4491
4492/**
4493 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
4494 * @adapter: board private structure to initialize
4495 *
4496 * Attempt to configure the interrupts using the best available
4497 * capabilities of the hardware and the kernel.
4498 **/
4499static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
4500{
4501 struct ixgbe_hw *hw = &adapter->hw;
4502 int err = 0;
4503 int vector, v_budget;
4504
4505 /*
4506 * It's easy to be greedy for MSI-X vectors, but it really
4507 * doesn't do us much good if we have a lot more vectors
4508 * than CPU's. So let's be conservative and only ask for
4509 * (roughly) the same number of vectors as there are CPU's.
4510 */
4511 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
4512 (int)num_online_cpus()) + NON_Q_VECTORS;
4513
4514 /*
4515 * At the same time, hardware can only support a maximum of
4516 * hw.mac->max_msix_vectors vectors. With features
4517 * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
4518 * descriptor queues supported by our device. Thus, we cap it off in
4519 * those rare cases where the cpu count also exceeds our vector limit.
4520 */
4521 v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
4522
4523 /* A failure in MSI-X entry allocation isn't fatal, but it does
4524 * mean we disable MSI-X capabilities of the adapter. */
4525 adapter->msix_entries = kcalloc(v_budget,
4526 sizeof(struct msix_entry), GFP_KERNEL);
4527 if (adapter->msix_entries) {
4528 for (vector = 0; vector < v_budget; vector++)
4529 adapter->msix_entries[vector].entry = vector;
4530
4531 ixgbe_acquire_msix_vectors(adapter, v_budget);
4532
4533 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4534 goto out;
4535 }
4536
4537 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
4538 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
4539 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4540 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4541 adapter->atr_sample_rate = 0;
4542 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4543 ixgbe_disable_sriov(adapter);
4544
4545 ixgbe_set_num_queues(adapter);
4546
4547 err = pci_enable_msi(adapter->pdev);
4548 if (!err) {
4549 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
4550 } else {
4551 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4552 "Unable to allocate MSI interrupt, "
4553 "falling back to legacy. Error: %d\n", err);
4554 /* reset err */
4555 err = 0;
4556 }
4557
4558out:
4559 return err;
4560}
4561
4562/**
4563 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
4564 * @adapter: board private structure to initialize
4565 *
4566 * We allocate one q_vector per queue interrupt. If allocation fails we
4567 * return -ENOMEM.
4568 **/
4569static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
4570{
4571 int q_idx, num_q_vectors;
4572 struct ixgbe_q_vector *q_vector;
4573 int napi_vectors;
4574 int (*poll)(struct napi_struct *, int);
4575
4576 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4577 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4578 napi_vectors = adapter->num_rx_queues;
4579 poll = &ixgbe_clean_rxtx_many;
4580 } else {
4581 num_q_vectors = 1;
4582 napi_vectors = 1;
4583 poll = &ixgbe_poll;
4584 }
4585
4586 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4587 q_vector = kzalloc_node(sizeof(struct ixgbe_q_vector),
4588 GFP_KERNEL, adapter->node);
4589 if (!q_vector)
4590 q_vector = kzalloc(sizeof(struct ixgbe_q_vector),
4591 GFP_KERNEL);
4592 if (!q_vector)
4593 goto err_out;
4594 q_vector->adapter = adapter;
4595 if (q_vector->txr_count && !q_vector->rxr_count)
4596 q_vector->eitr = adapter->tx_eitr_param;
4597 else
4598 q_vector->eitr = adapter->rx_eitr_param;
4599 q_vector->v_idx = q_idx;
4600 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
4601 adapter->q_vector[q_idx] = q_vector;
4602 }
4603
4604 return 0;
4605
4606err_out:
4607 while (q_idx) {
4608 q_idx--;
4609 q_vector = adapter->q_vector[q_idx];
4610 netif_napi_del(&q_vector->napi);
4611 kfree(q_vector);
4612 adapter->q_vector[q_idx] = NULL;
4613 }
4614 return -ENOMEM;
4615}
4616
4617/**
4618 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
4619 * @adapter: board private structure to initialize
4620 *
4621 * This function frees the memory allocated to the q_vectors. In addition if
4622 * NAPI is enabled it will delete any references to the NAPI struct prior
4623 * to freeing the q_vector.
4624 **/
4625static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
4626{
4627 int q_idx, num_q_vectors;
4628
4629 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4630 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4631 else
4632 num_q_vectors = 1;
4633
4634 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4635 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
4636 adapter->q_vector[q_idx] = NULL;
4637 netif_napi_del(&q_vector->napi);
4638 kfree(q_vector);
4639 }
4640}
4641
4642static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
4643{
4644 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4645 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4646 pci_disable_msix(adapter->pdev);
4647 kfree(adapter->msix_entries);
4648 adapter->msix_entries = NULL;
4649 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
4650 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
4651 pci_disable_msi(adapter->pdev);
4652 }
4653}
4654
4655/**
4656 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
4657 * @adapter: board private structure to initialize
4658 *
4659 * We determine which interrupt scheme to use based on...
4660 * - Kernel support (MSI, MSI-X)
4661 * - which can be user-defined (via MODULE_PARAM)
4662 * - Hardware queue count (num_*_queues)
4663 * - defined by miscellaneous hardware support/features (RSS, etc.)
4664 **/
4665int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
4666{
4667 int err;
4668
4669 /* Number of supported queues */
4670 ixgbe_set_num_queues(adapter);
4671
4672 err = ixgbe_set_interrupt_capability(adapter);
4673 if (err) {
4674 e_dev_err("Unable to setup interrupt capabilities\n");
4675 goto err_set_interrupt;
4676 }
4677
4678 err = ixgbe_alloc_q_vectors(adapter);
4679 if (err) {
4680 e_dev_err("Unable to allocate memory for queue vectors\n");
4681 goto err_alloc_q_vectors;
4682 }
4683
4684 err = ixgbe_alloc_queues(adapter);
4685 if (err) {
4686 e_dev_err("Unable to allocate memory for queues\n");
4687 goto err_alloc_queues;
4688 }
4689
4690 e_dev_info("Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u\n",
4691 (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
4692 adapter->num_rx_queues, adapter->num_tx_queues);
4693
4694 set_bit(__IXGBE_DOWN, &adapter->state);
4695
4696 return 0;
4697
4698err_alloc_queues:
4699 ixgbe_free_q_vectors(adapter);
4700err_alloc_q_vectors:
4701 ixgbe_reset_interrupt_capability(adapter);
4702err_set_interrupt:
4703 return err;
4704}
4705
4706/**
4707 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
4708 * @adapter: board private structure to clear interrupt scheme on
4709 *
4710 * We go through and clear interrupt specific resources and reset the structure
4711 * to pre-load conditions
4712 **/
4713void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
4714{
4715 int i;
4716
4717 for (i = 0; i < adapter->num_tx_queues; i++) {
4718 kfree(adapter->tx_ring[i]);
4719 adapter->tx_ring[i] = NULL;
4720 }
4721 for (i = 0; i < adapter->num_rx_queues; i++) {
4722 kfree(adapter->rx_ring[i]);
4723 adapter->rx_ring[i] = NULL;
4724 }
4725
4726 ixgbe_free_q_vectors(adapter);
4727 ixgbe_reset_interrupt_capability(adapter);
4728}
4729
4730/**
4731 * ixgbe_sfp_timer - worker thread to find a missing module
4732 * @data: pointer to our adapter struct
4733 **/
4734static void ixgbe_sfp_timer(unsigned long data)
4735{
4736 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4737
4738 /*
4739 * Do the sfp_timer outside of interrupt context due to the
4740 * delays that sfp+ detection requires
4741 */
4742 schedule_work(&adapter->sfp_task);
4743}
4744
4745/**
4746 * ixgbe_sfp_task - worker thread to find a missing module
4747 * @work: pointer to work_struct containing our data
4748 **/
4749static void ixgbe_sfp_task(struct work_struct *work)
4750{
4751 struct ixgbe_adapter *adapter = container_of(work,
4752 struct ixgbe_adapter,
4753 sfp_task);
4754 struct ixgbe_hw *hw = &adapter->hw;
4755
4756 if ((hw->phy.type == ixgbe_phy_nl) &&
4757 (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
4758 s32 ret = hw->phy.ops.identify_sfp(hw);
4759 if (ret == IXGBE_ERR_SFP_NOT_PRESENT)
4760 goto reschedule;
4761 ret = hw->phy.ops.reset(hw);
4762 if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
4763 e_dev_err("failed to initialize because an unsupported "
4764 "SFP+ module type was detected.\n");
4765 e_dev_err("Reload the driver after installing a "
4766 "supported module.\n");
4767 unregister_netdev(adapter->netdev);
4768 } else {
4769 e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
4770 }
4771 /* don't need this routine any more */
4772 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
4773 }
4774 return;
4775reschedule:
4776 if (test_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state))
4777 mod_timer(&adapter->sfp_timer,
4778 round_jiffies(jiffies + (2 * HZ)));
4779}
4780
4781/**
4782 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
4783 * @adapter: board private structure to initialize
4784 *
4785 * ixgbe_sw_init initializes the Adapter private data structure.
4786 * Fields are initialized based on PCI device information and
4787 * OS network device settings (MTU size).
4788 **/
4789static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
4790{
4791 struct ixgbe_hw *hw = &adapter->hw;
4792 struct pci_dev *pdev = adapter->pdev;
4793 struct net_device *dev = adapter->netdev;
4794 unsigned int rss;
4795#ifdef CONFIG_IXGBE_DCB
4796 int j;
4797 struct tc_configuration *tc;
4798#endif
4799
4800 /* PCI config space info */
4801
4802 hw->vendor_id = pdev->vendor;
4803 hw->device_id = pdev->device;
4804 hw->revision_id = pdev->revision;
4805 hw->subsystem_vendor_id = pdev->subsystem_vendor;
4806 hw->subsystem_device_id = pdev->subsystem_device;
4807
4808 /* Set capability flags */
4809 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
4810 adapter->ring_feature[RING_F_RSS].indices = rss;
4811 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
4812 adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
4813 if (hw->mac.type == ixgbe_mac_82598EB) {
4814 if (hw->device_id == IXGBE_DEV_ID_82598AT)
4815 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
4816 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
4817 } else if (hw->mac.type == ixgbe_mac_82599EB) {
4818 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
4819 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
4820 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
4821 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
4822 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
4823 if (dev->features & NETIF_F_NTUPLE) {
4824 /* Flow Director perfect filter enabled */
4825 adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4826 adapter->atr_sample_rate = 0;
4827 spin_lock_init(&adapter->fdir_perfect_lock);
4828 } else {
4829 /* Flow Director hash filters enabled */
4830 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
4831 adapter->atr_sample_rate = 20;
4832 }
4833 adapter->ring_feature[RING_F_FDIR].indices =
4834 IXGBE_MAX_FDIR_INDICES;
4835 adapter->fdir_pballoc = 0;
4836#ifdef IXGBE_FCOE
4837 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
4838 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
4839 adapter->ring_feature[RING_F_FCOE].indices = 0;
4840#ifdef CONFIG_IXGBE_DCB
4841 /* Default traffic class to use for FCoE */
4842 adapter->fcoe.tc = IXGBE_FCOE_DEFTC;
4843 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
4844#endif
4845#endif /* IXGBE_FCOE */
4846 }
4847
4848#ifdef CONFIG_IXGBE_DCB
4849 /* Configure DCB traffic classes */
4850 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
4851 tc = &adapter->dcb_cfg.tc_config[j];
4852 tc->path[DCB_TX_CONFIG].bwg_id = 0;
4853 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
4854 tc->path[DCB_RX_CONFIG].bwg_id = 0;
4855 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
4856 tc->dcb_pfc = pfc_disabled;
4857 }
4858 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
4859 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
4860 adapter->dcb_cfg.rx_pba_cfg = pba_equal;
4861 adapter->dcb_cfg.pfc_mode_enable = false;
4862 adapter->dcb_cfg.round_robin_enable = false;
4863 adapter->dcb_set_bitmap = 0x00;
4864 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
4865 adapter->ring_feature[RING_F_DCB].indices);
4866
4867#endif
4868
4869 /* default flow control settings */
4870 hw->fc.requested_mode = ixgbe_fc_full;
4871 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
4872#ifdef CONFIG_DCB
4873 adapter->last_lfc_mode = hw->fc.current_mode;
4874#endif
4875 hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
4876 hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
4877 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
4878 hw->fc.send_xon = true;
4879 hw->fc.disable_fc_autoneg = false;
4880
4881 /* enable itr by default in dynamic mode */
4882 adapter->rx_itr_setting = 1;
4883 adapter->rx_eitr_param = 20000;
4884 adapter->tx_itr_setting = 1;
4885 adapter->tx_eitr_param = 10000;
4886
4887 /* set defaults for eitr in MegaBytes */
4888 adapter->eitr_low = 10;
4889 adapter->eitr_high = 20;
4890
4891 /* set default ring sizes */
4892 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
4893 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
4894
4895 /* initialize eeprom parameters */
4896 if (ixgbe_init_eeprom_params_generic(hw)) {
4897 e_dev_err("EEPROM initialization failed\n");
4898 return -EIO;
4899 }
4900
4901 /* enable rx csum by default */
4902 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
4903
4904 /* get assigned NUMA node */
4905 adapter->node = dev_to_node(&pdev->dev);
4906
4907 set_bit(__IXGBE_DOWN, &adapter->state);
4908
4909 return 0;
4910}
4911
4912/**
4913 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
4914 * @adapter: board private structure
4915 * @tx_ring: tx descriptor ring (for a specific queue) to setup
4916 *
4917 * Return 0 on success, negative on failure
4918 **/
4919int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
4920 struct ixgbe_ring *tx_ring)
4921{
4922 struct pci_dev *pdev = adapter->pdev;
4923 int size;
4924
4925 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
4926 tx_ring->tx_buffer_info = vmalloc_node(size, tx_ring->numa_node);
4927 if (!tx_ring->tx_buffer_info)
4928 tx_ring->tx_buffer_info = vmalloc(size);
4929 if (!tx_ring->tx_buffer_info)
4930 goto err;
4931 memset(tx_ring->tx_buffer_info, 0, size);
4932
4933 /* round up to nearest 4K */
4934 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
4935 tx_ring->size = ALIGN(tx_ring->size, 4096);
4936
4937 tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
4938 &tx_ring->dma, GFP_KERNEL);
4939 if (!tx_ring->desc)
4940 goto err;
4941
4942 tx_ring->next_to_use = 0;
4943 tx_ring->next_to_clean = 0;
4944 tx_ring->work_limit = tx_ring->count;
4945 return 0;
4946
4947err:
4948 vfree(tx_ring->tx_buffer_info);
4949 tx_ring->tx_buffer_info = NULL;
4950 e_err(probe, "Unable to allocate memory for the Tx descriptor ring\n");
4951 return -ENOMEM;
4952}
4953
4954/**
4955 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
4956 * @adapter: board private structure
4957 *
4958 * If this function returns with an error, then it's possible one or
4959 * more of the rings is populated (while the rest are not). It is the
4960 * callers duty to clean those orphaned rings.
4961 *
4962 * Return 0 on success, negative on failure
4963 **/
4964static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
4965{
4966 int i, err = 0;
4967
4968 for (i = 0; i < adapter->num_tx_queues; i++) {
4969 err = ixgbe_setup_tx_resources(adapter, adapter->tx_ring[i]);
4970 if (!err)
4971 continue;
4972 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
4973 break;
4974 }
4975
4976 return err;
4977}
4978
4979/**
4980 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
4981 * @adapter: board private structure
4982 * @rx_ring: rx descriptor ring (for a specific queue) to setup
4983 *
4984 * Returns 0 on success, negative on failure
4985 **/
4986int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
4987 struct ixgbe_ring *rx_ring)
4988{
4989 struct pci_dev *pdev = adapter->pdev;
4990 int size;
4991
4992 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4993 rx_ring->rx_buffer_info = vmalloc_node(size, adapter->node);
4994 if (!rx_ring->rx_buffer_info)
4995 rx_ring->rx_buffer_info = vmalloc(size);
4996 if (!rx_ring->rx_buffer_info) {
4997 e_err(probe, "vmalloc allocation failed for the Rx "
4998 "descriptor ring\n");
4999 goto alloc_failed;
5000 }
5001 memset(rx_ring->rx_buffer_info, 0, size);
5002
5003 /* Round up to nearest 4K */
5004 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
5005 rx_ring->size = ALIGN(rx_ring->size, 4096);
5006
5007 rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
5008 &rx_ring->dma, GFP_KERNEL);
5009
5010 if (!rx_ring->desc) {
5011 e_err(probe, "Memory allocation failed for the Rx "
5012 "descriptor ring\n");
5013 vfree(rx_ring->rx_buffer_info);
5014 goto alloc_failed;
5015 }
5016
5017 rx_ring->next_to_clean = 0;
5018 rx_ring->next_to_use = 0;
5019
5020 return 0;
5021
5022alloc_failed:
5023 return -ENOMEM;
5024}
5025
5026/**
5027 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
5028 * @adapter: board private structure
5029 *
5030 * If this function returns with an error, then it's possible one or
5031 * more of the rings is populated (while the rest are not). It is the
5032 * callers duty to clean those orphaned rings.
5033 *
5034 * Return 0 on success, negative on failure
5035 **/
5036
5037static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
5038{
5039 int i, err = 0;
5040
5041 for (i = 0; i < adapter->num_rx_queues; i++) {
5042 err = ixgbe_setup_rx_resources(adapter, adapter->rx_ring[i]);
5043 if (!err)
5044 continue;
5045 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
5046 break;
5047 }
5048
5049 return err;
5050}
5051
5052/**
5053 * ixgbe_free_tx_resources - Free Tx Resources per Queue
5054 * @adapter: board private structure
5055 * @tx_ring: Tx descriptor ring for a specific queue
5056 *
5057 * Free all transmit software resources
5058 **/
5059void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
5060 struct ixgbe_ring *tx_ring)
5061{
5062 struct pci_dev *pdev = adapter->pdev;
5063
5064 ixgbe_clean_tx_ring(adapter, tx_ring);
5065
5066 vfree(tx_ring->tx_buffer_info);
5067 tx_ring->tx_buffer_info = NULL;
5068
5069 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
5070 tx_ring->dma);
5071
5072 tx_ring->desc = NULL;
5073}
5074
5075/**
5076 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
5077 * @adapter: board private structure
5078 *
5079 * Free all transmit software resources
5080 **/
5081static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
5082{
5083 int i;
5084
5085 for (i = 0; i < adapter->num_tx_queues; i++)
5086 if (adapter->tx_ring[i]->desc)
5087 ixgbe_free_tx_resources(adapter, adapter->tx_ring[i]);
5088}
5089
5090/**
5091 * ixgbe_free_rx_resources - Free Rx Resources
5092 * @adapter: board private structure
5093 * @rx_ring: ring to clean the resources from
5094 *
5095 * Free all receive software resources
5096 **/
5097void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
5098 struct ixgbe_ring *rx_ring)
5099{
5100 struct pci_dev *pdev = adapter->pdev;
5101
5102 ixgbe_clean_rx_ring(adapter, rx_ring);
5103
5104 vfree(rx_ring->rx_buffer_info);
5105 rx_ring->rx_buffer_info = NULL;
5106
5107 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
5108 rx_ring->dma);
5109
5110 rx_ring->desc = NULL;
5111}
5112
5113/**
5114 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
5115 * @adapter: board private structure
5116 *
5117 * Free all receive software resources
5118 **/
5119static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
5120{
5121 int i;
5122
5123 for (i = 0; i < adapter->num_rx_queues; i++)
5124 if (adapter->rx_ring[i]->desc)
5125 ixgbe_free_rx_resources(adapter, adapter->rx_ring[i]);
5126}
5127
5128/**
5129 * ixgbe_change_mtu - Change the Maximum Transfer Unit
5130 * @netdev: network interface device structure
5131 * @new_mtu: new value for maximum frame size
5132 *
5133 * Returns 0 on success, negative on failure
5134 **/
5135static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
5136{
5137 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5138 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5139
5140 /* MTU < 68 is an error and causes problems on some kernels */
5141 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
5142 return -EINVAL;
5143
5144 e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5145 /* must set new MTU before calling down or up */
5146 netdev->mtu = new_mtu;
5147
5148 if (netif_running(netdev))
5149 ixgbe_reinit_locked(adapter);
5150
5151 return 0;
5152}
5153
5154/**
5155 * ixgbe_open - Called when a network interface is made active
5156 * @netdev: network interface device structure
5157 *
5158 * Returns 0 on success, negative value on failure
5159 *
5160 * The open entry point is called when a network interface is made
5161 * active by the system (IFF_UP). At this point all resources needed
5162 * for transmit and receive operations are allocated, the interrupt
5163 * handler is registered with the OS, the watchdog timer is started,
5164 * and the stack is notified that the interface is ready.
5165 **/
5166static int ixgbe_open(struct net_device *netdev)
5167{
5168 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5169 int err;
5170
5171 /* disallow open during test */
5172 if (test_bit(__IXGBE_TESTING, &adapter->state))
5173 return -EBUSY;
5174
5175 netif_carrier_off(netdev);
5176
5177 /* allocate transmit descriptors */
5178 err = ixgbe_setup_all_tx_resources(adapter);
5179 if (err)
5180 goto err_setup_tx;
5181
5182 /* allocate receive descriptors */
5183 err = ixgbe_setup_all_rx_resources(adapter);
5184 if (err)
5185 goto err_setup_rx;
5186
5187 ixgbe_configure(adapter);
5188
5189 err = ixgbe_request_irq(adapter);
5190 if (err)
5191 goto err_req_irq;
5192
5193 err = ixgbe_up_complete(adapter);
5194 if (err)
5195 goto err_up;
5196
5197 netif_tx_start_all_queues(netdev);
5198
5199 return 0;
5200
5201err_up:
5202 ixgbe_release_hw_control(adapter);
5203 ixgbe_free_irq(adapter);
5204err_req_irq:
5205err_setup_rx:
5206 ixgbe_free_all_rx_resources(adapter);
5207err_setup_tx:
5208 ixgbe_free_all_tx_resources(adapter);
5209 ixgbe_reset(adapter);
5210
5211 return err;
5212}
5213
5214/**
5215 * ixgbe_close - Disables a network interface
5216 * @netdev: network interface device structure
5217 *
5218 * Returns 0, this is not allowed to fail
5219 *
5220 * The close entry point is called when an interface is de-activated
5221 * by the OS. The hardware is still under the drivers control, but
5222 * needs to be disabled. A global MAC reset is issued to stop the
5223 * hardware, and all transmit and receive resources are freed.
5224 **/
5225static int ixgbe_close(struct net_device *netdev)
5226{
5227 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5228
5229 ixgbe_down(adapter);
5230 ixgbe_free_irq(adapter);
5231
5232 ixgbe_free_all_tx_resources(adapter);
5233 ixgbe_free_all_rx_resources(adapter);
5234
5235 ixgbe_release_hw_control(adapter);
5236
5237 return 0;
5238}
5239
5240#ifdef CONFIG_PM
5241static int ixgbe_resume(struct pci_dev *pdev)
5242{
5243 struct net_device *netdev = pci_get_drvdata(pdev);
5244 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5245 u32 err;
5246
5247 pci_set_power_state(pdev, PCI_D0);
5248 pci_restore_state(pdev);
5249 /*
5250 * pci_restore_state clears dev->state_saved so call
5251 * pci_save_state to restore it.
5252 */
5253 pci_save_state(pdev);
5254
5255 err = pci_enable_device_mem(pdev);
5256 if (err) {
5257 e_dev_err("Cannot enable PCI device from suspend\n");
5258 return err;
5259 }
5260 pci_set_master(pdev);
5261
5262 pci_wake_from_d3(pdev, false);
5263
5264 err = ixgbe_init_interrupt_scheme(adapter);
5265 if (err) {
5266 e_dev_err("Cannot initialize interrupts for device\n");
5267 return err;
5268 }
5269
5270 ixgbe_reset(adapter);
5271
5272 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5273
5274 if (netif_running(netdev)) {
5275 err = ixgbe_open(adapter->netdev);
5276 if (err)
5277 return err;
5278 }
5279
5280 netif_device_attach(netdev);
5281
5282 return 0;
5283}
5284#endif /* CONFIG_PM */
5285
5286static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
5287{
5288 struct net_device *netdev = pci_get_drvdata(pdev);
5289 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5290 struct ixgbe_hw *hw = &adapter->hw;
5291 u32 ctrl, fctrl;
5292 u32 wufc = adapter->wol;
5293#ifdef CONFIG_PM
5294 int retval = 0;
5295#endif
5296
5297 netif_device_detach(netdev);
5298
5299 if (netif_running(netdev)) {
5300 ixgbe_down(adapter);
5301 ixgbe_free_irq(adapter);
5302 ixgbe_free_all_tx_resources(adapter);
5303 ixgbe_free_all_rx_resources(adapter);
5304 }
5305
5306#ifdef CONFIG_PM
5307 retval = pci_save_state(pdev);
5308 if (retval)
5309 return retval;
5310
5311#endif
5312 if (wufc) {
5313 ixgbe_set_rx_mode(netdev);
5314
5315 /* turn on all-multi mode if wake on multicast is enabled */
5316 if (wufc & IXGBE_WUFC_MC) {
5317 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5318 fctrl |= IXGBE_FCTRL_MPE;
5319 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
5320 }
5321
5322 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
5323 ctrl |= IXGBE_CTRL_GIO_DIS;
5324 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
5325
5326 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
5327 } else {
5328 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
5329 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
5330 }
5331
5332 if (wufc && hw->mac.type == ixgbe_mac_82599EB)
5333 pci_wake_from_d3(pdev, true);
5334 else
5335 pci_wake_from_d3(pdev, false);
5336
5337 *enable_wake = !!wufc;
5338
5339 ixgbe_clear_interrupt_scheme(adapter);
5340
5341 ixgbe_release_hw_control(adapter);
5342
5343 pci_disable_device(pdev);
5344
5345 return 0;
5346}
5347
5348#ifdef CONFIG_PM
5349static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
5350{
5351 int retval;
5352 bool wake;
5353
5354 retval = __ixgbe_shutdown(pdev, &wake);
5355 if (retval)
5356 return retval;
5357
5358 if (wake) {
5359 pci_prepare_to_sleep(pdev);
5360 } else {
5361 pci_wake_from_d3(pdev, false);
5362 pci_set_power_state(pdev, PCI_D3hot);
5363 }
5364
5365 return 0;
5366}
5367#endif /* CONFIG_PM */
5368
5369static void ixgbe_shutdown(struct pci_dev *pdev)
5370{
5371 bool wake;
5372
5373 __ixgbe_shutdown(pdev, &wake);
5374
5375 if (system_state == SYSTEM_POWER_OFF) {
5376 pci_wake_from_d3(pdev, wake);
5377 pci_set_power_state(pdev, PCI_D3hot);
5378 }
5379}
5380
5381/**
5382 * ixgbe_update_stats - Update the board statistics counters.
5383 * @adapter: board private structure
5384 **/
5385void ixgbe_update_stats(struct ixgbe_adapter *adapter)
5386{
5387 struct net_device *netdev = adapter->netdev;
5388 struct ixgbe_hw *hw = &adapter->hw;
5389 u64 total_mpc = 0;
5390 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
5391 u64 non_eop_descs = 0, restart_queue = 0;
5392
5393 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5394 test_bit(__IXGBE_RESETTING, &adapter->state))
5395 return;
5396
5397 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
5398 u64 rsc_count = 0;
5399 u64 rsc_flush = 0;
5400 for (i = 0; i < 16; i++)
5401 adapter->hw_rx_no_dma_resources +=
5402 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5403 for (i = 0; i < adapter->num_rx_queues; i++) {
5404 rsc_count += adapter->rx_ring[i]->rsc_count;
5405 rsc_flush += adapter->rx_ring[i]->rsc_flush;
5406 }
5407 adapter->rsc_total_count = rsc_count;
5408 adapter->rsc_total_flush = rsc_flush;
5409 }
5410
5411 /* gather some stats to the adapter struct that are per queue */
5412 for (i = 0; i < adapter->num_tx_queues; i++)
5413 restart_queue += adapter->tx_ring[i]->restart_queue;
5414 adapter->restart_queue = restart_queue;
5415
5416 for (i = 0; i < adapter->num_rx_queues; i++)
5417 non_eop_descs += adapter->rx_ring[i]->non_eop_descs;
5418 adapter->non_eop_descs = non_eop_descs;
5419
5420 adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
5421 for (i = 0; i < 8; i++) {
5422 /* for packet buffers not used, the register should read 0 */
5423 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
5424 missed_rx += mpc;
5425 adapter->stats.mpc[i] += mpc;
5426 total_mpc += adapter->stats.mpc[i];
5427 if (hw->mac.type == ixgbe_mac_82598EB)
5428 adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
5429 adapter->stats.qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
5430 adapter->stats.qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
5431 adapter->stats.qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
5432 adapter->stats.qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
5433 if (hw->mac.type == ixgbe_mac_82599EB) {
5434 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
5435 IXGBE_PXONRXCNT(i));
5436 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
5437 IXGBE_PXOFFRXCNT(i));
5438 adapter->stats.qprdc[i] += IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5439 } else {
5440 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
5441 IXGBE_PXONRXC(i));
5442 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
5443 IXGBE_PXOFFRXC(i));
5444 }
5445 adapter->stats.pxontxc[i] += IXGBE_READ_REG(hw,
5446 IXGBE_PXONTXC(i));
5447 adapter->stats.pxofftxc[i] += IXGBE_READ_REG(hw,
5448 IXGBE_PXOFFTXC(i));
5449 }
5450 adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
5451 /* work around hardware counting issue */
5452 adapter->stats.gprc -= missed_rx;
5453
5454 /* 82598 hardware only has a 32 bit counter in the high register */
5455 if (hw->mac.type == ixgbe_mac_82599EB) {
5456 u64 tmp;
5457 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
5458 tmp = IXGBE_READ_REG(hw, IXGBE_GORCH) & 0xF; /* 4 high bits of GORC */
5459 adapter->stats.gorc += (tmp << 32);
5460 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
5461 tmp = IXGBE_READ_REG(hw, IXGBE_GOTCH) & 0xF; /* 4 high bits of GOTC */
5462 adapter->stats.gotc += (tmp << 32);
5463 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORL);
5464 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
5465 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
5466 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
5467 adapter->stats.fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
5468 adapter->stats.fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
5469#ifdef IXGBE_FCOE
5470 adapter->stats.fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
5471 adapter->stats.fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
5472 adapter->stats.fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
5473 adapter->stats.fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
5474 adapter->stats.fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
5475 adapter->stats.fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
5476#endif /* IXGBE_FCOE */
5477 } else {
5478 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
5479 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
5480 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
5481 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
5482 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
5483 }
5484 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
5485 adapter->stats.bprc += bprc;
5486 adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
5487 if (hw->mac.type == ixgbe_mac_82598EB)
5488 adapter->stats.mprc -= bprc;
5489 adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
5490 adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
5491 adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
5492 adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
5493 adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
5494 adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
5495 adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
5496 adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
5497 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
5498 adapter->stats.lxontxc += lxon;
5499 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
5500 adapter->stats.lxofftxc += lxoff;
5501 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5502 adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
5503 adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
5504 /*
5505 * 82598 errata - tx of flow control packets is included in tx counters
5506 */
5507 xon_off_tot = lxon + lxoff;
5508 adapter->stats.gptc -= xon_off_tot;
5509 adapter->stats.mptc -= xon_off_tot;
5510 adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
5511 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5512 adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
5513 adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
5514 adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
5515 adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
5516 adapter->stats.ptc64 -= xon_off_tot;
5517 adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
5518 adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
5519 adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
5520 adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
5521 adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
5522 adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
5523
5524 /* Fill out the OS statistics structure */
5525 netdev->stats.multicast = adapter->stats.mprc;
5526
5527 /* Rx Errors */
5528 netdev->stats.rx_errors = adapter->stats.crcerrs +
5529 adapter->stats.rlec;
5530 netdev->stats.rx_dropped = 0;
5531 netdev->stats.rx_length_errors = adapter->stats.rlec;
5532 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
5533 netdev->stats.rx_missed_errors = total_mpc;
5534}
5535
5536/**
5537 * ixgbe_watchdog - Timer Call-back
5538 * @data: pointer to adapter cast into an unsigned long
5539 **/
5540static void ixgbe_watchdog(unsigned long data)
5541{
5542 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
5543 struct ixgbe_hw *hw = &adapter->hw;
5544 u64 eics = 0;
5545 int i;
5546
5547 /*
5548 * Do the watchdog outside of interrupt context due to the lovely
5549 * delays that some of the newer hardware requires
5550 */
5551
5552 if (test_bit(__IXGBE_DOWN, &adapter->state))
5553 goto watchdog_short_circuit;
5554
5555 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
5556 /*
5557 * for legacy and MSI interrupts don't set any bits
5558 * that are enabled for EIAM, because this operation
5559 * would set *both* EIMS and EICS for any bit in EIAM
5560 */
5561 IXGBE_WRITE_REG(hw, IXGBE_EICS,
5562 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
5563 goto watchdog_reschedule;
5564 }
5565
5566 /* get one bit for every active tx/rx interrupt vector */
5567 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
5568 struct ixgbe_q_vector *qv = adapter->q_vector[i];
5569 if (qv->rxr_count || qv->txr_count)
5570 eics |= ((u64)1 << i);
5571 }
5572
5573 /* Cause software interrupt to ensure rx rings are cleaned */
5574 ixgbe_irq_rearm_queues(adapter, eics);
5575
5576watchdog_reschedule:
5577 /* Reset the timer */
5578 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
5579
5580watchdog_short_circuit:
5581 schedule_work(&adapter->watchdog_task);
5582}
5583
5584/**
5585 * ixgbe_multispeed_fiber_task - worker thread to configure multispeed fiber
5586 * @work: pointer to work_struct containing our data
5587 **/
5588static void ixgbe_multispeed_fiber_task(struct work_struct *work)
5589{
5590 struct ixgbe_adapter *adapter = container_of(work,
5591 struct ixgbe_adapter,
5592 multispeed_fiber_task);
5593 struct ixgbe_hw *hw = &adapter->hw;
5594 u32 autoneg;
5595 bool negotiation;
5596
5597 adapter->flags |= IXGBE_FLAG_IN_SFP_LINK_TASK;
5598 autoneg = hw->phy.autoneg_advertised;
5599 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
5600 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
5601 hw->mac.autotry_restart = false;
5602 if (hw->mac.ops.setup_link)
5603 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
5604 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
5605 adapter->flags &= ~IXGBE_FLAG_IN_SFP_LINK_TASK;
5606}
5607
5608/**
5609 * ixgbe_sfp_config_module_task - worker thread to configure a new SFP+ module
5610 * @work: pointer to work_struct containing our data
5611 **/
5612static void ixgbe_sfp_config_module_task(struct work_struct *work)
5613{
5614 struct ixgbe_adapter *adapter = container_of(work,
5615 struct ixgbe_adapter,
5616 sfp_config_module_task);
5617 struct ixgbe_hw *hw = &adapter->hw;
5618 u32 err;
5619
5620 adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
5621
5622 /* Time for electrical oscillations to settle down */
5623 msleep(100);
5624 err = hw->phy.ops.identify_sfp(hw);
5625
5626 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5627 e_dev_err("failed to initialize because an unsupported SFP+ "
5628 "module type was detected.\n");
5629 e_dev_err("Reload the driver after installing a supported "
5630 "module.\n");
5631 unregister_netdev(adapter->netdev);
5632 return;
5633 }
5634 hw->mac.ops.setup_sfp(hw);
5635
5636 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
5637 /* This will also work for DA Twinax connections */
5638 schedule_work(&adapter->multispeed_fiber_task);
5639 adapter->flags &= ~IXGBE_FLAG_IN_SFP_MOD_TASK;
5640}
5641
5642/**
5643 * ixgbe_fdir_reinit_task - worker thread to reinit FDIR filter table
5644 * @work: pointer to work_struct containing our data
5645 **/
5646static void ixgbe_fdir_reinit_task(struct work_struct *work)
5647{
5648 struct ixgbe_adapter *adapter = container_of(work,
5649 struct ixgbe_adapter,
5650 fdir_reinit_task);
5651 struct ixgbe_hw *hw = &adapter->hw;
5652 int i;
5653
5654 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
5655 for (i = 0; i < adapter->num_tx_queues; i++)
5656 set_bit(__IXGBE_FDIR_INIT_DONE,
5657 &(adapter->tx_ring[i]->reinit_state));
5658 } else {
5659 e_err(probe, "failed to finish FDIR re-initialization, "
5660 "ignored adding FDIR ATR filters\n");
5661 }
5662 /* Done FDIR Re-initialization, enable transmits */
5663 netif_tx_start_all_queues(adapter->netdev);
5664}
5665
5666static DEFINE_MUTEX(ixgbe_watchdog_lock);
5667
5668/**
5669 * ixgbe_watchdog_task - worker thread to bring link up
5670 * @work: pointer to work_struct containing our data
5671 **/
5672static void ixgbe_watchdog_task(struct work_struct *work)
5673{
5674 struct ixgbe_adapter *adapter = container_of(work,
5675 struct ixgbe_adapter,
5676 watchdog_task);
5677 struct net_device *netdev = adapter->netdev;
5678 struct ixgbe_hw *hw = &adapter->hw;
5679 u32 link_speed;
5680 bool link_up;
5681 int i;
5682 struct ixgbe_ring *tx_ring;
5683 int some_tx_pending = 0;
5684
5685 mutex_lock(&ixgbe_watchdog_lock);
5686
5687 link_up = adapter->link_up;
5688 link_speed = adapter->link_speed;
5689
5690 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
5691 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
5692 if (link_up) {
5693#ifdef CONFIG_DCB
5694 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5695 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
5696 hw->mac.ops.fc_enable(hw, i);
5697 } else {
5698 hw->mac.ops.fc_enable(hw, 0);
5699 }
5700#else
5701 hw->mac.ops.fc_enable(hw, 0);
5702#endif
5703 }
5704
5705 if (link_up ||
5706 time_after(jiffies, (adapter->link_check_timeout +
5707 IXGBE_TRY_LINK_TIMEOUT))) {
5708 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5709 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
5710 }
5711 adapter->link_up = link_up;
5712 adapter->link_speed = link_speed;
5713 }
5714
5715 if (link_up) {
5716 if (!netif_carrier_ok(netdev)) {
5717 bool flow_rx, flow_tx;
5718
5719 if (hw->mac.type == ixgbe_mac_82599EB) {
5720 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
5721 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
5722 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
5723 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
5724 } else {
5725 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5726 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
5727 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
5728 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
5729 }
5730
5731 e_info(drv, "NIC Link is Up %s, Flow Control: %s\n",
5732 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
5733 "10 Gbps" :
5734 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
5735 "1 Gbps" : "unknown speed")),
5736 ((flow_rx && flow_tx) ? "RX/TX" :
5737 (flow_rx ? "RX" :
5738 (flow_tx ? "TX" : "None"))));
5739
5740 netif_carrier_on(netdev);
5741 } else {
5742 /* Force detection of hung controller */
5743 adapter->detect_tx_hung = true;
5744 }
5745 } else {
5746 adapter->link_up = false;
5747 adapter->link_speed = 0;
5748 if (netif_carrier_ok(netdev)) {
5749 e_info(drv, "NIC Link is Down\n");
5750 netif_carrier_off(netdev);
5751 }
5752 }
5753
5754 if (!netif_carrier_ok(netdev)) {
5755 for (i = 0; i < adapter->num_tx_queues; i++) {
5756 tx_ring = adapter->tx_ring[i];
5757 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
5758 some_tx_pending = 1;
5759 break;
5760 }
5761 }
5762
5763 if (some_tx_pending) {
5764 /* We've lost link, so the controller stops DMA,
5765 * but we've got queued Tx work that's never going
5766 * to get done, so reset controller to flush Tx.
5767 * (Do the reset outside of interrupt context).
5768 */
5769 schedule_work(&adapter->reset_task);
5770 }
5771 }
5772
5773 ixgbe_update_stats(adapter);
5774 mutex_unlock(&ixgbe_watchdog_lock);
5775}
5776
5777static int ixgbe_tso(struct ixgbe_adapter *adapter,
5778 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
5779 u32 tx_flags, u8 *hdr_len)
5780{
5781 struct ixgbe_adv_tx_context_desc *context_desc;
5782 unsigned int i;
5783 int err;
5784 struct ixgbe_tx_buffer *tx_buffer_info;
5785 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
5786 u32 mss_l4len_idx, l4len;
5787
5788 if (skb_is_gso(skb)) {
5789 if (skb_header_cloned(skb)) {
5790 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
5791 if (err)
5792 return err;
5793 }
5794 l4len = tcp_hdrlen(skb);
5795 *hdr_len += l4len;
5796
5797 if (skb->protocol == htons(ETH_P_IP)) {
5798 struct iphdr *iph = ip_hdr(skb);
5799 iph->tot_len = 0;
5800 iph->check = 0;
5801 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
5802 iph->daddr, 0,
5803 IPPROTO_TCP,
5804 0);
5805 } else if (skb_is_gso_v6(skb)) {
5806 ipv6_hdr(skb)->payload_len = 0;
5807 tcp_hdr(skb)->check =
5808 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
5809 &ipv6_hdr(skb)->daddr,
5810 0, IPPROTO_TCP, 0);
5811 }
5812
5813 i = tx_ring->next_to_use;
5814
5815 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5816 context_desc = IXGBE_TX_CTXTDESC_ADV(tx_ring, i);
5817
5818 /* VLAN MACLEN IPLEN */
5819 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5820 vlan_macip_lens |=
5821 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
5822 vlan_macip_lens |= ((skb_network_offset(skb)) <<
5823 IXGBE_ADVTXD_MACLEN_SHIFT);
5824 *hdr_len += skb_network_offset(skb);
5825 vlan_macip_lens |=
5826 (skb_transport_header(skb) - skb_network_header(skb));
5827 *hdr_len +=
5828 (skb_transport_header(skb) - skb_network_header(skb));
5829 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
5830 context_desc->seqnum_seed = 0;
5831
5832 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
5833 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
5834 IXGBE_ADVTXD_DTYP_CTXT);
5835
5836 if (skb->protocol == htons(ETH_P_IP))
5837 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
5838 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
5839 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
5840
5841 /* MSS L4LEN IDX */
5842 mss_l4len_idx =
5843 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
5844 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
5845 /* use index 1 for TSO */
5846 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
5847 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
5848
5849 tx_buffer_info->time_stamp = jiffies;
5850 tx_buffer_info->next_to_watch = i;
5851
5852 i++;
5853 if (i == tx_ring->count)
5854 i = 0;
5855 tx_ring->next_to_use = i;
5856
5857 return true;
5858 }
5859 return false;
5860}
5861
5862static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
5863 struct ixgbe_ring *tx_ring,
5864 struct sk_buff *skb, u32 tx_flags)
5865{
5866 struct ixgbe_adv_tx_context_desc *context_desc;
5867 unsigned int i;
5868 struct ixgbe_tx_buffer *tx_buffer_info;
5869 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
5870
5871 if (skb->ip_summed == CHECKSUM_PARTIAL ||
5872 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
5873 i = tx_ring->next_to_use;
5874 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5875 context_desc = IXGBE_TX_CTXTDESC_ADV(tx_ring, i);
5876
5877 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5878 vlan_macip_lens |=
5879 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
5880 vlan_macip_lens |= (skb_network_offset(skb) <<
5881 IXGBE_ADVTXD_MACLEN_SHIFT);
5882 if (skb->ip_summed == CHECKSUM_PARTIAL)
5883 vlan_macip_lens |= (skb_transport_header(skb) -
5884 skb_network_header(skb));
5885
5886 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
5887 context_desc->seqnum_seed = 0;
5888
5889 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
5890 IXGBE_ADVTXD_DTYP_CTXT);
5891
5892 if (skb->ip_summed == CHECKSUM_PARTIAL) {
5893 __be16 protocol;
5894
5895 if (skb->protocol == cpu_to_be16(ETH_P_8021Q)) {
5896 const struct vlan_ethhdr *vhdr =
5897 (const struct vlan_ethhdr *)skb->data;
5898
5899 protocol = vhdr->h_vlan_encapsulated_proto;
5900 } else {
5901 protocol = skb->protocol;
5902 }
5903
5904 switch (protocol) {
5905 case cpu_to_be16(ETH_P_IP):
5906 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
5907 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
5908 type_tucmd_mlhl |=
5909 IXGBE_ADVTXD_TUCMD_L4T_TCP;
5910 else if (ip_hdr(skb)->protocol == IPPROTO_SCTP)
5911 type_tucmd_mlhl |=
5912 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
5913 break;
5914 case cpu_to_be16(ETH_P_IPV6):
5915 /* XXX what about other V6 headers?? */
5916 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
5917 type_tucmd_mlhl |=
5918 IXGBE_ADVTXD_TUCMD_L4T_TCP;
5919 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_SCTP)
5920 type_tucmd_mlhl |=
5921 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
5922 break;
5923 default:
5924 if (unlikely(net_ratelimit())) {
5925 e_warn(probe, "partial checksum "
5926 "but proto=%x!\n",
5927 skb->protocol);
5928 }
5929 break;
5930 }
5931 }
5932
5933 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
5934 /* use index zero for tx checksum offload */
5935 context_desc->mss_l4len_idx = 0;
5936
5937 tx_buffer_info->time_stamp = jiffies;
5938 tx_buffer_info->next_to_watch = i;
5939
5940 i++;
5941 if (i == tx_ring->count)
5942 i = 0;
5943 tx_ring->next_to_use = i;
5944
5945 return true;
5946 }
5947
5948 return false;
5949}
5950
5951static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
5952 struct ixgbe_ring *tx_ring,
5953 struct sk_buff *skb, u32 tx_flags,
5954 unsigned int first)
5955{
5956 struct pci_dev *pdev = adapter->pdev;
5957 struct ixgbe_tx_buffer *tx_buffer_info;
5958 unsigned int len;
5959 unsigned int total = skb->len;
5960 unsigned int offset = 0, size, count = 0, i;
5961 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
5962 unsigned int f;
5963
5964 i = tx_ring->next_to_use;
5965
5966 if (tx_flags & IXGBE_TX_FLAGS_FCOE)
5967 /* excluding fcoe_crc_eof for FCoE */
5968 total -= sizeof(struct fcoe_crc_eof);
5969
5970 len = min(skb_headlen(skb), total);
5971 while (len) {
5972 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5973 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
5974
5975 tx_buffer_info->length = size;
5976 tx_buffer_info->mapped_as_page = false;
5977 tx_buffer_info->dma = dma_map_single(&pdev->dev,
5978 skb->data + offset,
5979 size, DMA_TO_DEVICE);
5980 if (dma_mapping_error(&pdev->dev, tx_buffer_info->dma))
5981 goto dma_error;
5982 tx_buffer_info->time_stamp = jiffies;
5983 tx_buffer_info->next_to_watch = i;
5984
5985 len -= size;
5986 total -= size;
5987 offset += size;
5988 count++;
5989
5990 if (len) {
5991 i++;
5992 if (i == tx_ring->count)
5993 i = 0;
5994 }
5995 }
5996
5997 for (f = 0; f < nr_frags; f++) {
5998 struct skb_frag_struct *frag;
5999
6000 frag = &skb_shinfo(skb)->frags[f];
6001 len = min((unsigned int)frag->size, total);
6002 offset = frag->page_offset;
6003
6004 while (len) {
6005 i++;
6006 if (i == tx_ring->count)
6007 i = 0;
6008
6009 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6010 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
6011
6012 tx_buffer_info->length = size;
6013 tx_buffer_info->dma = dma_map_page(&adapter->pdev->dev,
6014 frag->page,
6015 offset, size,
6016 DMA_TO_DEVICE);
6017 tx_buffer_info->mapped_as_page = true;
6018 if (dma_mapping_error(&pdev->dev, tx_buffer_info->dma))
6019 goto dma_error;
6020 tx_buffer_info->time_stamp = jiffies;
6021 tx_buffer_info->next_to_watch = i;
6022
6023 len -= size;
6024 total -= size;
6025 offset += size;
6026 count++;
6027 }
6028 if (total == 0)
6029 break;
6030 }
6031
6032 tx_ring->tx_buffer_info[i].skb = skb;
6033 tx_ring->tx_buffer_info[first].next_to_watch = i;
6034
6035 return count;
6036
6037dma_error:
6038 e_dev_err("TX DMA map failed\n");
6039
6040 /* clear timestamp and dma mappings for failed tx_buffer_info map */
6041 tx_buffer_info->dma = 0;
6042 tx_buffer_info->time_stamp = 0;
6043 tx_buffer_info->next_to_watch = 0;
6044 if (count)
6045 count--;
6046
6047 /* clear timestamp and dma mappings for remaining portion of packet */
6048 while (count--) {
6049 if (i==0)
6050 i += tx_ring->count;
6051 i--;
6052 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6053 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
6054 }
6055
6056 return 0;
6057}
6058
6059static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
6060 struct ixgbe_ring *tx_ring,
6061 int tx_flags, int count, u32 paylen, u8 hdr_len)
6062{
6063 union ixgbe_adv_tx_desc *tx_desc = NULL;
6064 struct ixgbe_tx_buffer *tx_buffer_info;
6065 u32 olinfo_status = 0, cmd_type_len = 0;
6066 unsigned int i;
6067 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
6068
6069 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
6070
6071 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
6072
6073 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
6074 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
6075
6076 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
6077 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6078
6079 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6080 IXGBE_ADVTXD_POPTS_SHIFT;
6081
6082 /* use index 1 context for tso */
6083 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6084 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
6085 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
6086 IXGBE_ADVTXD_POPTS_SHIFT;
6087
6088 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
6089 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6090 IXGBE_ADVTXD_POPTS_SHIFT;
6091
6092 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6093 olinfo_status |= IXGBE_ADVTXD_CC;
6094 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6095 if (tx_flags & IXGBE_TX_FLAGS_FSO)
6096 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6097 }
6098
6099 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
6100
6101 i = tx_ring->next_to_use;
6102 while (count--) {
6103 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6104 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
6105 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
6106 tx_desc->read.cmd_type_len =
6107 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
6108 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
6109 i++;
6110 if (i == tx_ring->count)
6111 i = 0;
6112 }
6113
6114 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
6115
6116 /*
6117 * Force memory writes to complete before letting h/w
6118 * know there are new descriptors to fetch. (Only
6119 * applicable for weak-ordered memory model archs,
6120 * such as IA-64).
6121 */
6122 wmb();
6123
6124 tx_ring->next_to_use = i;
6125 writel(i, adapter->hw.hw_addr + tx_ring->tail);
6126}
6127
6128static void ixgbe_atr(struct ixgbe_adapter *adapter, struct sk_buff *skb,
6129 int queue, u32 tx_flags)
6130{
6131 struct ixgbe_atr_input atr_input;
6132 struct tcphdr *th;
6133 struct iphdr *iph = ip_hdr(skb);
6134 struct ethhdr *eth = (struct ethhdr *)skb->data;
6135 u16 vlan_id, src_port, dst_port, flex_bytes;
6136 u32 src_ipv4_addr, dst_ipv4_addr;
6137 u8 l4type = 0;
6138
6139 /* Right now, we support IPv4 only */
6140 if (skb->protocol != htons(ETH_P_IP))
6141 return;
6142 /* check if we're UDP or TCP */
6143 if (iph->protocol == IPPROTO_TCP) {
6144 th = tcp_hdr(skb);
6145 src_port = th->source;
6146 dst_port = th->dest;
6147 l4type |= IXGBE_ATR_L4TYPE_TCP;
6148 /* l4type IPv4 type is 0, no need to assign */
6149 } else {
6150 /* Unsupported L4 header, just bail here */
6151 return;
6152 }
6153
6154 memset(&atr_input, 0, sizeof(struct ixgbe_atr_input));
6155
6156 vlan_id = (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK) >>
6157 IXGBE_TX_FLAGS_VLAN_SHIFT;
6158 src_ipv4_addr = iph->saddr;
6159 dst_ipv4_addr = iph->daddr;
6160 flex_bytes = eth->h_proto;
6161
6162 ixgbe_atr_set_vlan_id_82599(&atr_input, vlan_id);
6163 ixgbe_atr_set_src_port_82599(&atr_input, dst_port);
6164 ixgbe_atr_set_dst_port_82599(&atr_input, src_port);
6165 ixgbe_atr_set_flex_byte_82599(&atr_input, flex_bytes);
6166 ixgbe_atr_set_l4type_82599(&atr_input, l4type);
6167 /* src and dst are inverted, think how the receiver sees them */
6168 ixgbe_atr_set_src_ipv4_82599(&atr_input, dst_ipv4_addr);
6169 ixgbe_atr_set_dst_ipv4_82599(&atr_input, src_ipv4_addr);
6170
6171 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
6172 ixgbe_fdir_add_signature_filter_82599(&adapter->hw, &atr_input, queue);
6173}
6174
6175static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
6176 struct ixgbe_ring *tx_ring, int size)
6177{
6178 netif_stop_subqueue(netdev, tx_ring->queue_index);
6179 /* Herbert's original patch had:
6180 * smp_mb__after_netif_stop_queue();
6181 * but since that doesn't exist yet, just open code it. */
6182 smp_mb();
6183
6184 /* We need to check again in a case another CPU has just
6185 * made room available. */
6186 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
6187 return -EBUSY;
6188
6189 /* A reprieve! - use start_queue because it doesn't call schedule */
6190 netif_start_subqueue(netdev, tx_ring->queue_index);
6191 ++tx_ring->restart_queue;
6192 return 0;
6193}
6194
6195static int ixgbe_maybe_stop_tx(struct net_device *netdev,
6196 struct ixgbe_ring *tx_ring, int size)
6197{
6198 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
6199 return 0;
6200 return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
6201}
6202
6203static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
6204{
6205 struct ixgbe_adapter *adapter = netdev_priv(dev);
6206 int txq = smp_processor_id();
6207
6208#ifdef IXGBE_FCOE
6209 if ((skb->protocol == htons(ETH_P_FCOE)) ||
6210 (skb->protocol == htons(ETH_P_FIP))) {
6211 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
6212 txq &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
6213 txq += adapter->ring_feature[RING_F_FCOE].mask;
6214 return txq;
6215#ifdef CONFIG_IXGBE_DCB
6216 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6217 txq = adapter->fcoe.up;
6218 return txq;
6219#endif
6220 }
6221 }
6222#endif
6223
6224 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
6225 while (unlikely(txq >= dev->real_num_tx_queues))
6226 txq -= dev->real_num_tx_queues;
6227 return txq;
6228 }
6229
6230 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6231 if (skb->priority == TC_PRIO_CONTROL)
6232 txq = adapter->ring_feature[RING_F_DCB].indices-1;
6233 else
6234 txq = (skb->vlan_tci & IXGBE_TX_FLAGS_VLAN_PRIO_MASK)
6235 >> 13;
6236 return txq;
6237 }
6238
6239 return skb_tx_hash(dev, skb);
6240}
6241
6242static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
6243 struct net_device *netdev)
6244{
6245 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6246 struct ixgbe_ring *tx_ring;
6247 struct netdev_queue *txq;
6248 unsigned int first;
6249 unsigned int tx_flags = 0;
6250 u8 hdr_len = 0;
6251 int tso;
6252 int count = 0;
6253 unsigned int f;
6254
6255 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
6256 tx_flags |= vlan_tx_tag_get(skb);
6257 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6258 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
6259 tx_flags |= ((skb->queue_mapping & 0x7) << 13);
6260 }
6261 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6262 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6263 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED &&
6264 skb->priority != TC_PRIO_CONTROL) {
6265 tx_flags |= ((skb->queue_mapping & 0x7) << 13);
6266 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6267 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6268 }
6269
6270 tx_ring = adapter->tx_ring[skb->queue_mapping];
6271
6272#ifdef IXGBE_FCOE
6273 /* for FCoE with DCB, we force the priority to what
6274 * was specified by the switch */
6275 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED &&
6276 (skb->protocol == htons(ETH_P_FCOE) ||
6277 skb->protocol == htons(ETH_P_FIP))) {
6278#ifdef CONFIG_IXGBE_DCB
6279 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6280 tx_flags &= ~(IXGBE_TX_FLAGS_VLAN_PRIO_MASK
6281 << IXGBE_TX_FLAGS_VLAN_SHIFT);
6282 tx_flags |= ((adapter->fcoe.up << 13)
6283 << IXGBE_TX_FLAGS_VLAN_SHIFT);
6284 }
6285#endif
6286 /* flag for FCoE offloads */
6287 if (skb->protocol == htons(ETH_P_FCOE))
6288 tx_flags |= IXGBE_TX_FLAGS_FCOE;
6289 }
6290#endif
6291
6292 /* four things can cause us to need a context descriptor */
6293 if (skb_is_gso(skb) ||
6294 (skb->ip_summed == CHECKSUM_PARTIAL) ||
6295 (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
6296 (tx_flags & IXGBE_TX_FLAGS_FCOE))
6297 count++;
6298
6299 count += TXD_USE_COUNT(skb_headlen(skb));
6300 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
6301 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
6302
6303 if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
6304 adapter->tx_busy++;
6305 return NETDEV_TX_BUSY;
6306 }
6307
6308 first = tx_ring->next_to_use;
6309 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6310#ifdef IXGBE_FCOE
6311 /* setup tx offload for FCoE */
6312 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
6313 if (tso < 0) {
6314 dev_kfree_skb_any(skb);
6315 return NETDEV_TX_OK;
6316 }
6317 if (tso)
6318 tx_flags |= IXGBE_TX_FLAGS_FSO;
6319#endif /* IXGBE_FCOE */
6320 } else {
6321 if (skb->protocol == htons(ETH_P_IP))
6322 tx_flags |= IXGBE_TX_FLAGS_IPV4;
6323 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
6324 if (tso < 0) {
6325 dev_kfree_skb_any(skb);
6326 return NETDEV_TX_OK;
6327 }
6328
6329 if (tso)
6330 tx_flags |= IXGBE_TX_FLAGS_TSO;
6331 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
6332 (skb->ip_summed == CHECKSUM_PARTIAL))
6333 tx_flags |= IXGBE_TX_FLAGS_CSUM;
6334 }
6335
6336 count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first);
6337 if (count) {
6338 /* add the ATR filter if ATR is on */
6339 if (tx_ring->atr_sample_rate) {
6340 ++tx_ring->atr_count;
6341 if ((tx_ring->atr_count >= tx_ring->atr_sample_rate) &&
6342 test_bit(__IXGBE_FDIR_INIT_DONE,
6343 &tx_ring->reinit_state)) {
6344 ixgbe_atr(adapter, skb, tx_ring->queue_index,
6345 tx_flags);
6346 tx_ring->atr_count = 0;
6347 }
6348 }
6349 txq = netdev_get_tx_queue(netdev, tx_ring->queue_index);
6350 txq->tx_bytes += skb->len;
6351 txq->tx_packets++;
6352 ixgbe_tx_queue(adapter, tx_ring, tx_flags, count, skb->len,
6353 hdr_len);
6354 ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
6355
6356 } else {
6357 dev_kfree_skb_any(skb);
6358 tx_ring->tx_buffer_info[first].time_stamp = 0;
6359 tx_ring->next_to_use = first;
6360 }
6361
6362 return NETDEV_TX_OK;
6363}
6364
6365/**
6366 * ixgbe_set_mac - Change the Ethernet Address of the NIC
6367 * @netdev: network interface device structure
6368 * @p: pointer to an address structure
6369 *
6370 * Returns 0 on success, negative on failure
6371 **/
6372static int ixgbe_set_mac(struct net_device *netdev, void *p)
6373{
6374 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6375 struct ixgbe_hw *hw = &adapter->hw;
6376 struct sockaddr *addr = p;
6377
6378 if (!is_valid_ether_addr(addr->sa_data))
6379 return -EADDRNOTAVAIL;
6380
6381 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
6382 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
6383
6384 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
6385 IXGBE_RAH_AV);
6386
6387 return 0;
6388}
6389
6390static int
6391ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
6392{
6393 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6394 struct ixgbe_hw *hw = &adapter->hw;
6395 u16 value;
6396 int rc;
6397
6398 if (prtad != hw->phy.mdio.prtad)
6399 return -EINVAL;
6400 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
6401 if (!rc)
6402 rc = value;
6403 return rc;
6404}
6405
6406static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
6407 u16 addr, u16 value)
6408{
6409 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6410 struct ixgbe_hw *hw = &adapter->hw;
6411
6412 if (prtad != hw->phy.mdio.prtad)
6413 return -EINVAL;
6414 return hw->phy.ops.write_reg(hw, addr, devad, value);
6415}
6416
6417static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
6418{
6419 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6420
6421 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
6422}
6423
6424/**
6425 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
6426 * netdev->dev_addrs
6427 * @netdev: network interface device structure
6428 *
6429 * Returns non-zero on failure
6430 **/
6431static int ixgbe_add_sanmac_netdev(struct net_device *dev)
6432{
6433 int err = 0;
6434 struct ixgbe_adapter *adapter = netdev_priv(dev);
6435 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6436
6437 if (is_valid_ether_addr(mac->san_addr)) {
6438 rtnl_lock();
6439 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6440 rtnl_unlock();
6441 }
6442 return err;
6443}
6444
6445/**
6446 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
6447 * netdev->dev_addrs
6448 * @netdev: network interface device structure
6449 *
6450 * Returns non-zero on failure
6451 **/
6452static int ixgbe_del_sanmac_netdev(struct net_device *dev)
6453{
6454 int err = 0;
6455 struct ixgbe_adapter *adapter = netdev_priv(dev);
6456 struct ixgbe_mac_info *mac = &adapter->hw.mac;
6457
6458 if (is_valid_ether_addr(mac->san_addr)) {
6459 rtnl_lock();
6460 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6461 rtnl_unlock();
6462 }
6463 return err;
6464}
6465
6466#ifdef CONFIG_NET_POLL_CONTROLLER
6467/*
6468 * Polling 'interrupt' - used by things like netconsole to send skbs
6469 * without having to re-enable interrupts. It's not called while
6470 * the interrupt routine is executing.
6471 */
6472static void ixgbe_netpoll(struct net_device *netdev)
6473{
6474 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6475 int i;
6476
6477 /* if interface is down do nothing */
6478 if (test_bit(__IXGBE_DOWN, &adapter->state))
6479 return;
6480
6481 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
6482 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
6483 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
6484 for (i = 0; i < num_q_vectors; i++) {
6485 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
6486 ixgbe_msix_clean_many(0, q_vector);
6487 }
6488 } else {
6489 ixgbe_intr(adapter->pdev->irq, netdev);
6490 }
6491 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
6492}
6493#endif
6494
6495static const struct net_device_ops ixgbe_netdev_ops = {
6496 .ndo_open = ixgbe_open,
6497 .ndo_stop = ixgbe_close,
6498 .ndo_start_xmit = ixgbe_xmit_frame,
6499 .ndo_select_queue = ixgbe_select_queue,
6500 .ndo_set_rx_mode = ixgbe_set_rx_mode,
6501 .ndo_set_multicast_list = ixgbe_set_rx_mode,
6502 .ndo_validate_addr = eth_validate_addr,
6503 .ndo_set_mac_address = ixgbe_set_mac,
6504 .ndo_change_mtu = ixgbe_change_mtu,
6505 .ndo_tx_timeout = ixgbe_tx_timeout,
6506 .ndo_vlan_rx_register = ixgbe_vlan_rx_register,
6507 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
6508 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
6509 .ndo_do_ioctl = ixgbe_ioctl,
6510 .ndo_set_vf_mac = ixgbe_ndo_set_vf_mac,
6511 .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
6512 .ndo_set_vf_tx_rate = ixgbe_ndo_set_vf_bw,
6513 .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
6514#ifdef CONFIG_NET_POLL_CONTROLLER
6515 .ndo_poll_controller = ixgbe_netpoll,
6516#endif
6517#ifdef IXGBE_FCOE
6518 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
6519 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
6520 .ndo_fcoe_enable = ixgbe_fcoe_enable,
6521 .ndo_fcoe_disable = ixgbe_fcoe_disable,
6522 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
6523#endif /* IXGBE_FCOE */
6524};
6525
6526static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter,
6527 const struct ixgbe_info *ii)
6528{
6529#ifdef CONFIG_PCI_IOV
6530 struct ixgbe_hw *hw = &adapter->hw;
6531 int err;
6532
6533 if (hw->mac.type != ixgbe_mac_82599EB || !max_vfs)
6534 return;
6535
6536 /* The 82599 supports up to 64 VFs per physical function
6537 * but this implementation limits allocation to 63 so that
6538 * basic networking resources are still available to the
6539 * physical function
6540 */
6541 adapter->num_vfs = (max_vfs > 63) ? 63 : max_vfs;
6542 adapter->flags |= IXGBE_FLAG_SRIOV_ENABLED;
6543 err = pci_enable_sriov(adapter->pdev, adapter->num_vfs);
6544 if (err) {
6545 e_err(probe, "Failed to enable PCI sriov: %d\n", err);
6546 goto err_novfs;
6547 }
6548 /* If call to enable VFs succeeded then allocate memory
6549 * for per VF control structures.
6550 */
6551 adapter->vfinfo =
6552 kcalloc(adapter->num_vfs,
6553 sizeof(struct vf_data_storage), GFP_KERNEL);
6554 if (adapter->vfinfo) {
6555 /* Now that we're sure SR-IOV is enabled
6556 * and memory allocated set up the mailbox parameters
6557 */
6558 ixgbe_init_mbx_params_pf(hw);
6559 memcpy(&hw->mbx.ops, ii->mbx_ops,
6560 sizeof(hw->mbx.ops));
6561
6562 /* Disable RSC when in SR-IOV mode */
6563 adapter->flags2 &= ~(IXGBE_FLAG2_RSC_CAPABLE |
6564 IXGBE_FLAG2_RSC_ENABLED);
6565 return;
6566 }
6567
6568 /* Oh oh */
6569 e_err(probe, "Unable to allocate memory for VF Data Storage - "
6570 "SRIOV disabled\n");
6571 pci_disable_sriov(adapter->pdev);
6572
6573err_novfs:
6574 adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
6575 adapter->num_vfs = 0;
6576#endif /* CONFIG_PCI_IOV */
6577}
6578
6579/**
6580 * ixgbe_probe - Device Initialization Routine
6581 * @pdev: PCI device information struct
6582 * @ent: entry in ixgbe_pci_tbl
6583 *
6584 * Returns 0 on success, negative on failure
6585 *
6586 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
6587 * The OS initialization, configuring of the adapter private structure,
6588 * and a hardware reset occur.
6589 **/
6590static int __devinit ixgbe_probe(struct pci_dev *pdev,
6591 const struct pci_device_id *ent)
6592{
6593 struct net_device *netdev;
6594 struct ixgbe_adapter *adapter = NULL;
6595 struct ixgbe_hw *hw;
6596 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
6597 static int cards_found;
6598 int i, err, pci_using_dac;
6599 unsigned int indices = num_possible_cpus();
6600#ifdef IXGBE_FCOE
6601 u16 device_caps;
6602#endif
6603 u32 part_num, eec;
6604
6605 /* Catch broken hardware that put the wrong VF device ID in
6606 * the PCIe SR-IOV capability.
6607 */
6608 if (pdev->is_virtfn) {
6609 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
6610 pci_name(pdev), pdev->vendor, pdev->device);
6611 return -EINVAL;
6612 }
6613
6614 err = pci_enable_device_mem(pdev);
6615 if (err)
6616 return err;
6617
6618 if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
6619 !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
6620 pci_using_dac = 1;
6621 } else {
6622 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
6623 if (err) {
6624 err = dma_set_coherent_mask(&pdev->dev,
6625 DMA_BIT_MASK(32));
6626 if (err) {
6627 dev_err(&pdev->dev,
6628 "No usable DMA configuration, aborting\n");
6629 goto err_dma;
6630 }
6631 }
6632 pci_using_dac = 0;
6633 }
6634
6635 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
6636 IORESOURCE_MEM), ixgbe_driver_name);
6637 if (err) {
6638 dev_err(&pdev->dev,
6639 "pci_request_selected_regions failed 0x%x\n", err);
6640 goto err_pci_reg;
6641 }
6642
6643 pci_enable_pcie_error_reporting(pdev);
6644
6645 pci_set_master(pdev);
6646 pci_save_state(pdev);
6647
6648 if (ii->mac == ixgbe_mac_82598EB)
6649 indices = min_t(unsigned int, indices, IXGBE_MAX_RSS_INDICES);
6650 else
6651 indices = min_t(unsigned int, indices, IXGBE_MAX_FDIR_INDICES);
6652
6653 indices = max_t(unsigned int, indices, IXGBE_MAX_DCB_INDICES);
6654#ifdef IXGBE_FCOE
6655 indices += min_t(unsigned int, num_possible_cpus(),
6656 IXGBE_MAX_FCOE_INDICES);
6657#endif
6658 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
6659 if (!netdev) {
6660 err = -ENOMEM;
6661 goto err_alloc_etherdev;
6662 }
6663
6664 SET_NETDEV_DEV(netdev, &pdev->dev);
6665
6666 pci_set_drvdata(pdev, netdev);
6667 adapter = netdev_priv(netdev);
6668
6669 adapter->netdev = netdev;
6670 adapter->pdev = pdev;
6671 hw = &adapter->hw;
6672 hw->back = adapter;
6673 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
6674
6675 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
6676 pci_resource_len(pdev, 0));
6677 if (!hw->hw_addr) {
6678 err = -EIO;
6679 goto err_ioremap;
6680 }
6681
6682 for (i = 1; i <= 5; i++) {
6683 if (pci_resource_len(pdev, i) == 0)
6684 continue;
6685 }
6686
6687 netdev->netdev_ops = &ixgbe_netdev_ops;
6688 ixgbe_set_ethtool_ops(netdev);
6689 netdev->watchdog_timeo = 5 * HZ;
6690 strcpy(netdev->name, pci_name(pdev));
6691
6692 adapter->bd_number = cards_found;
6693
6694 /* Setup hw api */
6695 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
6696 hw->mac.type = ii->mac;
6697
6698 /* EEPROM */
6699 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
6700 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
6701 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
6702 if (!(eec & (1 << 8)))
6703 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
6704
6705 /* PHY */
6706 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
6707 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
6708 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
6709 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
6710 hw->phy.mdio.mmds = 0;
6711 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
6712 hw->phy.mdio.dev = netdev;
6713 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
6714 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
6715
6716 /* set up this timer and work struct before calling get_invariants
6717 * which might start the timer
6718 */
6719 init_timer(&adapter->sfp_timer);
6720 adapter->sfp_timer.function = &ixgbe_sfp_timer;
6721 adapter->sfp_timer.data = (unsigned long) adapter;
6722
6723 INIT_WORK(&adapter->sfp_task, ixgbe_sfp_task);
6724
6725 /* multispeed fiber has its own tasklet, called from GPI SDP1 context */
6726 INIT_WORK(&adapter->multispeed_fiber_task, ixgbe_multispeed_fiber_task);
6727
6728 /* a new SFP+ module arrival, called from GPI SDP2 context */
6729 INIT_WORK(&adapter->sfp_config_module_task,
6730 ixgbe_sfp_config_module_task);
6731
6732 ii->get_invariants(hw);
6733
6734 /* setup the private structure */
6735 err = ixgbe_sw_init(adapter);
6736 if (err)
6737 goto err_sw_init;
6738
6739 /* Make it possible the adapter to be woken up via WOL */
6740 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
6741 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
6742
6743 /*
6744 * If there is a fan on this device and it has failed log the
6745 * failure.
6746 */
6747 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
6748 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
6749 if (esdp & IXGBE_ESDP_SDP1)
6750 e_crit(probe, "Fan has stopped, replace the adapter\n");
6751 }
6752
6753 /* reset_hw fills in the perm_addr as well */
6754 hw->phy.reset_if_overtemp = true;
6755 err = hw->mac.ops.reset_hw(hw);
6756 hw->phy.reset_if_overtemp = false;
6757 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
6758 hw->mac.type == ixgbe_mac_82598EB) {
6759 /*
6760 * Start a kernel thread to watch for a module to arrive.
6761 * Only do this for 82598, since 82599 will generate
6762 * interrupts on module arrival.
6763 */
6764 set_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
6765 mod_timer(&adapter->sfp_timer,
6766 round_jiffies(jiffies + (2 * HZ)));
6767 err = 0;
6768 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
6769 e_dev_err("failed to initialize because an unsupported SFP+ "
6770 "module type was detected.\n");
6771 e_dev_err("Reload the driver after installing a supported "
6772 "module.\n");
6773 goto err_sw_init;
6774 } else if (err) {
6775 e_dev_err("HW Init failed: %d\n", err);
6776 goto err_sw_init;
6777 }
6778
6779 ixgbe_probe_vf(adapter, ii);
6780
6781 netdev->features = NETIF_F_SG |
6782 NETIF_F_IP_CSUM |
6783 NETIF_F_HW_VLAN_TX |
6784 NETIF_F_HW_VLAN_RX |
6785 NETIF_F_HW_VLAN_FILTER;
6786
6787 netdev->features |= NETIF_F_IPV6_CSUM;
6788 netdev->features |= NETIF_F_TSO;
6789 netdev->features |= NETIF_F_TSO6;
6790 netdev->features |= NETIF_F_GRO;
6791
6792 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
6793 netdev->features |= NETIF_F_SCTP_CSUM;
6794
6795 netdev->vlan_features |= NETIF_F_TSO;
6796 netdev->vlan_features |= NETIF_F_TSO6;
6797 netdev->vlan_features |= NETIF_F_IP_CSUM;
6798 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
6799 netdev->vlan_features |= NETIF_F_SG;
6800
6801 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6802 adapter->flags &= ~(IXGBE_FLAG_RSS_ENABLED |
6803 IXGBE_FLAG_DCB_ENABLED);
6804 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
6805 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
6806
6807#ifdef CONFIG_IXGBE_DCB
6808 netdev->dcbnl_ops = &dcbnl_ops;
6809#endif
6810
6811#ifdef IXGBE_FCOE
6812 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
6813 if (hw->mac.ops.get_device_caps) {
6814 hw->mac.ops.get_device_caps(hw, &device_caps);
6815 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
6816 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
6817 }
6818 }
6819 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
6820 netdev->vlan_features |= NETIF_F_FCOE_CRC;
6821 netdev->vlan_features |= NETIF_F_FSO;
6822 netdev->vlan_features |= NETIF_F_FCOE_MTU;
6823 }
6824#endif /* IXGBE_FCOE */
6825 if (pci_using_dac)
6826 netdev->features |= NETIF_F_HIGHDMA;
6827
6828 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
6829 netdev->features |= NETIF_F_LRO;
6830
6831 /* make sure the EEPROM is good */
6832 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
6833 e_dev_err("The EEPROM Checksum Is Not Valid\n");
6834 err = -EIO;
6835 goto err_eeprom;
6836 }
6837
6838 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
6839 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
6840
6841 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
6842 e_dev_err("invalid MAC address\n");
6843 err = -EIO;
6844 goto err_eeprom;
6845 }
6846
6847 /* power down the optics */
6848 if (hw->phy.multispeed_fiber)
6849 hw->mac.ops.disable_tx_laser(hw);
6850
6851 init_timer(&adapter->watchdog_timer);
6852 adapter->watchdog_timer.function = &ixgbe_watchdog;
6853 adapter->watchdog_timer.data = (unsigned long)adapter;
6854
6855 INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
6856 INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
6857
6858 err = ixgbe_init_interrupt_scheme(adapter);
6859 if (err)
6860 goto err_sw_init;
6861
6862 switch (pdev->device) {
6863 case IXGBE_DEV_ID_82599_KX4:
6864 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
6865 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
6866 break;
6867 default:
6868 adapter->wol = 0;
6869 break;
6870 }
6871 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
6872
6873 /* pick up the PCI bus settings for reporting later */
6874 hw->mac.ops.get_bus_info(hw);
6875
6876 /* print bus type/speed/width info */
6877 e_dev_info("(PCI Express:%s:%s) %pM\n",
6878 ((hw->bus.speed == ixgbe_bus_speed_5000) ? "5.0Gb/s":
6879 (hw->bus.speed == ixgbe_bus_speed_2500) ? "2.5Gb/s":"Unknown"),
6880 ((hw->bus.width == ixgbe_bus_width_pcie_x8) ? "Width x8" :
6881 (hw->bus.width == ixgbe_bus_width_pcie_x4) ? "Width x4" :
6882 (hw->bus.width == ixgbe_bus_width_pcie_x1) ? "Width x1" :
6883 "Unknown"),
6884 netdev->dev_addr);
6885 ixgbe_read_pba_num_generic(hw, &part_num);
6886 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
6887 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, "
6888 "PBA No: %06x-%03x\n",
6889 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
6890 (part_num >> 8), (part_num & 0xff));
6891 else
6892 e_dev_info("MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
6893 hw->mac.type, hw->phy.type,
6894 (part_num >> 8), (part_num & 0xff));
6895
6896 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
6897 e_dev_warn("PCI-Express bandwidth available for this card is "
6898 "not sufficient for optimal performance.\n");
6899 e_dev_warn("For optimal performance a x8 PCI-Express slot "
6900 "is required.\n");
6901 }
6902
6903 /* save off EEPROM version number */
6904 hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
6905
6906 /* reset the hardware with the new settings */
6907 err = hw->mac.ops.start_hw(hw);
6908
6909 if (err == IXGBE_ERR_EEPROM_VERSION) {
6910 /* We are running on a pre-production device, log a warning */
6911 e_dev_warn("This device is a pre-production adapter/LOM. "
6912 "Please be aware there may be issues associated "
6913 "with your hardware. If you are experiencing "
6914 "problems please contact your Intel or hardware "
6915 "representative who provided you with this "
6916 "hardware.\n");
6917 }
6918 strcpy(netdev->name, "eth%d");
6919 err = register_netdev(netdev);
6920 if (err)
6921 goto err_register;
6922
6923 /* carrier off reporting is important to ethtool even BEFORE open */
6924 netif_carrier_off(netdev);
6925
6926 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
6927 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
6928 INIT_WORK(&adapter->fdir_reinit_task, ixgbe_fdir_reinit_task);
6929
6930 if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
6931 INIT_WORK(&adapter->check_overtemp_task, ixgbe_check_overtemp_task);
6932#ifdef CONFIG_IXGBE_DCA
6933 if (dca_add_requester(&pdev->dev) == 0) {
6934 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
6935 ixgbe_setup_dca(adapter);
6936 }
6937#endif
6938 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
6939 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
6940 for (i = 0; i < adapter->num_vfs; i++)
6941 ixgbe_vf_configuration(pdev, (i | 0x10000000));
6942 }
6943
6944 /* add san mac addr to netdev */
6945 ixgbe_add_sanmac_netdev(netdev);
6946
6947 e_dev_info("Intel(R) 10 Gigabit Network Connection\n");
6948 cards_found++;
6949 return 0;
6950
6951err_register:
6952 ixgbe_release_hw_control(adapter);
6953 ixgbe_clear_interrupt_scheme(adapter);
6954err_sw_init:
6955err_eeprom:
6956 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6957 ixgbe_disable_sriov(adapter);
6958 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
6959 del_timer_sync(&adapter->sfp_timer);
6960 cancel_work_sync(&adapter->sfp_task);
6961 cancel_work_sync(&adapter->multispeed_fiber_task);
6962 cancel_work_sync(&adapter->sfp_config_module_task);
6963 iounmap(hw->hw_addr);
6964err_ioremap:
6965 free_netdev(netdev);
6966err_alloc_etherdev:
6967 pci_release_selected_regions(pdev, pci_select_bars(pdev,
6968 IORESOURCE_MEM));
6969err_pci_reg:
6970err_dma:
6971 pci_disable_device(pdev);
6972 return err;
6973}
6974
6975/**
6976 * ixgbe_remove - Device Removal Routine
6977 * @pdev: PCI device information struct
6978 *
6979 * ixgbe_remove is called by the PCI subsystem to alert the driver
6980 * that it should release a PCI device. The could be caused by a
6981 * Hot-Plug event, or because the driver is going to be removed from
6982 * memory.
6983 **/
6984static void __devexit ixgbe_remove(struct pci_dev *pdev)
6985{
6986 struct net_device *netdev = pci_get_drvdata(pdev);
6987 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6988
6989 set_bit(__IXGBE_DOWN, &adapter->state);
6990 /* clear the module not found bit to make sure the worker won't
6991 * reschedule
6992 */
6993 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
6994 del_timer_sync(&adapter->watchdog_timer);
6995
6996 del_timer_sync(&adapter->sfp_timer);
6997 cancel_work_sync(&adapter->watchdog_task);
6998 cancel_work_sync(&adapter->sfp_task);
6999 cancel_work_sync(&adapter->multispeed_fiber_task);
7000 cancel_work_sync(&adapter->sfp_config_module_task);
7001 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
7002 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
7003 cancel_work_sync(&adapter->fdir_reinit_task);
7004 flush_scheduled_work();
7005
7006#ifdef CONFIG_IXGBE_DCA
7007 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
7008 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
7009 dca_remove_requester(&pdev->dev);
7010 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
7011 }
7012
7013#endif
7014#ifdef IXGBE_FCOE
7015 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
7016 ixgbe_cleanup_fcoe(adapter);
7017
7018#endif /* IXGBE_FCOE */
7019
7020 /* remove the added san mac */
7021 ixgbe_del_sanmac_netdev(netdev);
7022
7023 if (netdev->reg_state == NETREG_REGISTERED)
7024 unregister_netdev(netdev);
7025
7026 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7027 ixgbe_disable_sriov(adapter);
7028
7029 ixgbe_clear_interrupt_scheme(adapter);
7030
7031 ixgbe_release_hw_control(adapter);
7032
7033 iounmap(adapter->hw.hw_addr);
7034 pci_release_selected_regions(pdev, pci_select_bars(pdev,
7035 IORESOURCE_MEM));
7036
7037 e_dev_info("complete\n");
7038
7039 free_netdev(netdev);
7040
7041 pci_disable_pcie_error_reporting(pdev);
7042
7043 pci_disable_device(pdev);
7044}
7045
7046/**
7047 * ixgbe_io_error_detected - called when PCI error is detected
7048 * @pdev: Pointer to PCI device
7049 * @state: The current pci connection state
7050 *
7051 * This function is called after a PCI bus error affecting
7052 * this device has been detected.
7053 */
7054static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
7055 pci_channel_state_t state)
7056{
7057 struct net_device *netdev = pci_get_drvdata(pdev);
7058 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7059
7060 netif_device_detach(netdev);
7061
7062 if (state == pci_channel_io_perm_failure)
7063 return PCI_ERS_RESULT_DISCONNECT;
7064
7065 if (netif_running(netdev))
7066 ixgbe_down(adapter);
7067 pci_disable_device(pdev);
7068
7069 /* Request a slot reset. */
7070 return PCI_ERS_RESULT_NEED_RESET;
7071}
7072
7073/**
7074 * ixgbe_io_slot_reset - called after the pci bus has been reset.
7075 * @pdev: Pointer to PCI device
7076 *
7077 * Restart the card from scratch, as if from a cold-boot.
7078 */
7079static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
7080{
7081 struct net_device *netdev = pci_get_drvdata(pdev);
7082 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7083 pci_ers_result_t result;
7084 int err;
7085
7086 if (pci_enable_device_mem(pdev)) {
7087 e_err(probe, "Cannot re-enable PCI device after reset.\n");
7088 result = PCI_ERS_RESULT_DISCONNECT;
7089 } else {
7090 pci_set_master(pdev);
7091 pci_restore_state(pdev);
7092 pci_save_state(pdev);
7093
7094 pci_wake_from_d3(pdev, false);
7095
7096 ixgbe_reset(adapter);
7097 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7098 result = PCI_ERS_RESULT_RECOVERED;
7099 }
7100
7101 err = pci_cleanup_aer_uncorrect_error_status(pdev);
7102 if (err) {
7103 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
7104 "failed 0x%0x\n", err);
7105 /* non-fatal, continue */
7106 }
7107
7108 return result;
7109}
7110
7111/**
7112 * ixgbe_io_resume - called when traffic can start flowing again.
7113 * @pdev: Pointer to PCI device
7114 *
7115 * This callback is called when the error recovery driver tells us that
7116 * its OK to resume normal operation.
7117 */
7118static void ixgbe_io_resume(struct pci_dev *pdev)
7119{
7120 struct net_device *netdev = pci_get_drvdata(pdev);
7121 struct ixgbe_adapter *adapter = netdev_priv(netdev);
7122
7123 if (netif_running(netdev)) {
7124 if (ixgbe_up(adapter)) {
7125 e_info(probe, "ixgbe_up failed after reset\n");
7126 return;
7127 }
7128 }
7129
7130 netif_device_attach(netdev);
7131}
7132
7133static struct pci_error_handlers ixgbe_err_handler = {
7134 .error_detected = ixgbe_io_error_detected,
7135 .slot_reset = ixgbe_io_slot_reset,
7136 .resume = ixgbe_io_resume,
7137};
7138
7139static struct pci_driver ixgbe_driver = {
7140 .name = ixgbe_driver_name,
7141 .id_table = ixgbe_pci_tbl,
7142 .probe = ixgbe_probe,
7143 .remove = __devexit_p(ixgbe_remove),
7144#ifdef CONFIG_PM
7145 .suspend = ixgbe_suspend,
7146 .resume = ixgbe_resume,
7147#endif
7148 .shutdown = ixgbe_shutdown,
7149 .err_handler = &ixgbe_err_handler
7150};
7151
7152/**
7153 * ixgbe_init_module - Driver Registration Routine
7154 *
7155 * ixgbe_init_module is the first routine called when the driver is
7156 * loaded. All it does is register with the PCI subsystem.
7157 **/
7158static int __init ixgbe_init_module(void)
7159{
7160 int ret;
7161 pr_info("%s - version %s\n", ixgbe_driver_string,
7162 ixgbe_driver_version);
7163 pr_info("%s\n", ixgbe_copyright);
7164
7165#ifdef CONFIG_IXGBE_DCA
7166 dca_register_notify(&dca_notifier);
7167#endif
7168
7169 ret = pci_register_driver(&ixgbe_driver);
7170 return ret;
7171}
7172
7173module_init(ixgbe_init_module);
7174
7175/**
7176 * ixgbe_exit_module - Driver Exit Cleanup Routine
7177 *
7178 * ixgbe_exit_module is called just before the driver is removed
7179 * from memory.
7180 **/
7181static void __exit ixgbe_exit_module(void)
7182{
7183#ifdef CONFIG_IXGBE_DCA
7184 dca_unregister_notify(&dca_notifier);
7185#endif
7186 pci_unregister_driver(&ixgbe_driver);
7187}
7188
7189#ifdef CONFIG_IXGBE_DCA
7190static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
7191 void *p)
7192{
7193 int ret_val;
7194
7195 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
7196 __ixgbe_notify_dca);
7197
7198 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
7199}
7200
7201#endif /* CONFIG_IXGBE_DCA */
7202
7203/**
7204 * ixgbe_get_hw_dev return device
7205 * used by hardware layer to print debugging information
7206 **/
7207struct net_device *ixgbe_get_hw_dev(struct ixgbe_hw *hw)
7208{
7209 struct ixgbe_adapter *adapter = hw->back;
7210 return adapter->netdev;
7211}
7212
7213module_exit(ixgbe_exit_module);
7214
7215/* ixgbe_main.c */
Clone of davem's net-next-2.6 tree