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ixgbe: Modify 82599 HWRSC statistics counters
[deliverable/linux.git] / drivers / net / ixgbe / ixgbe_main.c
1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2009 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 <net/checksum.h>
40 #include <net/ip6_checksum.h>
41 #include <linux/ethtool.h>
42 #include <linux/if_vlan.h>
43 #include <scsi/fc/fc_fcoe.h>
44
45 #include "ixgbe.h"
46 #include "ixgbe_common.h"
47 #include "ixgbe_dcb_82599.h"
48
49 char ixgbe_driver_name[] = "ixgbe";
50 static const char ixgbe_driver_string[] =
51 "Intel(R) 10 Gigabit PCI Express Network Driver";
52
53 #define DRV_VERSION "2.0.44-k2"
54 const char ixgbe_driver_version[] = DRV_VERSION;
55 static char ixgbe_copyright[] = "Copyright (c) 1999-2009 Intel Corporation.";
56
57 static const struct ixgbe_info *ixgbe_info_tbl[] = {
58 [board_82598] = &ixgbe_82598_info,
59 [board_82599] = &ixgbe_82599_info,
60 };
61
62 /* ixgbe_pci_tbl - PCI Device ID Table
63 *
64 * Wildcard entries (PCI_ANY_ID) should come last
65 * Last entry must be all 0s
66 *
67 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
68 * Class, Class Mask, private data (not used) }
69 */
70 static struct pci_device_id ixgbe_pci_tbl[] = {
71 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598),
72 board_82598 },
73 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
74 board_82598 },
75 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
76 board_82598 },
77 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT),
78 board_82598 },
79 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2),
80 board_82598 },
81 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
82 board_82598 },
83 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT),
84 board_82598 },
85 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT),
86 board_82598 },
87 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM),
88 board_82598 },
89 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR),
90 board_82598 },
91 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM),
92 board_82598 },
93 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX),
94 board_82598 },
95 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4),
96 board_82599 },
97 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM),
98 board_82599 },
99 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP),
100 board_82599 },
101 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM),
102 board_82599 },
103 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ),
104 board_82599 },
105 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4),
106 board_82599 },
107 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE),
108 board_82599 },
109
110 /* required last entry */
111 {0, }
112 };
113 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
114
115 #ifdef CONFIG_IXGBE_DCA
116 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
117 void *p);
118 static struct notifier_block dca_notifier = {
119 .notifier_call = ixgbe_notify_dca,
120 .next = NULL,
121 .priority = 0
122 };
123 #endif
124
125 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
126 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
127 MODULE_LICENSE("GPL");
128 MODULE_VERSION(DRV_VERSION);
129
130 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
131
132 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
133 {
134 u32 ctrl_ext;
135
136 /* Let firmware take over control of h/w */
137 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
138 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
139 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
140 }
141
142 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
143 {
144 u32 ctrl_ext;
145
146 /* Let firmware know the driver has taken over */
147 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
148 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
149 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
150 }
151
152 /*
153 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
154 * @adapter: pointer to adapter struct
155 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
156 * @queue: queue to map the corresponding interrupt to
157 * @msix_vector: the vector to map to the corresponding queue
158 *
159 */
160 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
161 u8 queue, u8 msix_vector)
162 {
163 u32 ivar, index;
164 struct ixgbe_hw *hw = &adapter->hw;
165 switch (hw->mac.type) {
166 case ixgbe_mac_82598EB:
167 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
168 if (direction == -1)
169 direction = 0;
170 index = (((direction * 64) + queue) >> 2) & 0x1F;
171 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
172 ivar &= ~(0xFF << (8 * (queue & 0x3)));
173 ivar |= (msix_vector << (8 * (queue & 0x3)));
174 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
175 break;
176 case ixgbe_mac_82599EB:
177 if (direction == -1) {
178 /* other causes */
179 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
180 index = ((queue & 1) * 8);
181 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
182 ivar &= ~(0xFF << index);
183 ivar |= (msix_vector << index);
184 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
185 break;
186 } else {
187 /* tx or rx causes */
188 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
189 index = ((16 * (queue & 1)) + (8 * direction));
190 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
191 ivar &= ~(0xFF << index);
192 ivar |= (msix_vector << index);
193 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
194 break;
195 }
196 default:
197 break;
198 }
199 }
200
201 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
202 u64 qmask)
203 {
204 u32 mask;
205
206 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
207 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
208 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
209 } else {
210 mask = (qmask & 0xFFFFFFFF);
211 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
212 mask = (qmask >> 32);
213 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
214 }
215 }
216
217 static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
218 struct ixgbe_tx_buffer
219 *tx_buffer_info)
220 {
221 tx_buffer_info->dma = 0;
222 if (tx_buffer_info->skb) {
223 skb_dma_unmap(&adapter->pdev->dev, tx_buffer_info->skb,
224 DMA_TO_DEVICE);
225 dev_kfree_skb_any(tx_buffer_info->skb);
226 tx_buffer_info->skb = NULL;
227 }
228 tx_buffer_info->time_stamp = 0;
229 /* tx_buffer_info must be completely set up in the transmit path */
230 }
231
232 /**
233 * ixgbe_tx_is_paused - check if the tx ring is paused
234 * @adapter: the ixgbe adapter
235 * @tx_ring: the corresponding tx_ring
236 *
237 * If not in DCB mode, checks TFCS.TXOFF, otherwise, find out the
238 * corresponding TC of this tx_ring when checking TFCS.
239 *
240 * Returns : true if paused
241 */
242 static inline bool ixgbe_tx_is_paused(struct ixgbe_adapter *adapter,
243 struct ixgbe_ring *tx_ring)
244 {
245 int tc;
246 u32 txoff = IXGBE_TFCS_TXOFF;
247
248 #ifdef CONFIG_IXGBE_DCB
249 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
250 int reg_idx = tx_ring->reg_idx;
251 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
252
253 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
254 tc = reg_idx >> 2;
255 txoff = IXGBE_TFCS_TXOFF0;
256 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
257 tc = 0;
258 txoff = IXGBE_TFCS_TXOFF;
259 if (dcb_i == 8) {
260 /* TC0, TC1 */
261 tc = reg_idx >> 5;
262 if (tc == 2) /* TC2, TC3 */
263 tc += (reg_idx - 64) >> 4;
264 else if (tc == 3) /* TC4, TC5, TC6, TC7 */
265 tc += 1 + ((reg_idx - 96) >> 3);
266 } else if (dcb_i == 4) {
267 /* TC0, TC1 */
268 tc = reg_idx >> 6;
269 if (tc == 1) {
270 tc += (reg_idx - 64) >> 5;
271 if (tc == 2) /* TC2, TC3 */
272 tc += (reg_idx - 96) >> 4;
273 }
274 }
275 }
276 txoff <<= tc;
277 }
278 #endif
279 return IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & txoff;
280 }
281
282 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
283 struct ixgbe_ring *tx_ring,
284 unsigned int eop)
285 {
286 struct ixgbe_hw *hw = &adapter->hw;
287
288 /* Detect a transmit hang in hardware, this serializes the
289 * check with the clearing of time_stamp and movement of eop */
290 adapter->detect_tx_hung = false;
291 if (tx_ring->tx_buffer_info[eop].time_stamp &&
292 time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
293 !ixgbe_tx_is_paused(adapter, tx_ring)) {
294 /* detected Tx unit hang */
295 union ixgbe_adv_tx_desc *tx_desc;
296 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
297 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
298 " Tx Queue <%d>\n"
299 " TDH, TDT <%x>, <%x>\n"
300 " next_to_use <%x>\n"
301 " next_to_clean <%x>\n"
302 "tx_buffer_info[next_to_clean]\n"
303 " time_stamp <%lx>\n"
304 " jiffies <%lx>\n",
305 tx_ring->queue_index,
306 IXGBE_READ_REG(hw, tx_ring->head),
307 IXGBE_READ_REG(hw, tx_ring->tail),
308 tx_ring->next_to_use, eop,
309 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
310 return true;
311 }
312
313 return false;
314 }
315
316 #define IXGBE_MAX_TXD_PWR 14
317 #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
318
319 /* Tx Descriptors needed, worst case */
320 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
321 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
322 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
323 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
324
325 static void ixgbe_tx_timeout(struct net_device *netdev);
326
327 /**
328 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
329 * @q_vector: structure containing interrupt and ring information
330 * @tx_ring: tx ring to clean
331 **/
332 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
333 struct ixgbe_ring *tx_ring)
334 {
335 struct ixgbe_adapter *adapter = q_vector->adapter;
336 struct net_device *netdev = adapter->netdev;
337 union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
338 struct ixgbe_tx_buffer *tx_buffer_info;
339 unsigned int i, eop, count = 0;
340 unsigned int total_bytes = 0, total_packets = 0;
341
342 i = tx_ring->next_to_clean;
343 eop = tx_ring->tx_buffer_info[i].next_to_watch;
344 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
345
346 while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
347 (count < tx_ring->work_limit)) {
348 bool cleaned = false;
349 for ( ; !cleaned; count++) {
350 struct sk_buff *skb;
351 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
352 tx_buffer_info = &tx_ring->tx_buffer_info[i];
353 cleaned = (i == eop);
354 skb = tx_buffer_info->skb;
355
356 if (cleaned && skb) {
357 unsigned int segs, bytecount;
358 unsigned int hlen = skb_headlen(skb);
359
360 /* gso_segs is currently only valid for tcp */
361 segs = skb_shinfo(skb)->gso_segs ?: 1;
362 #ifdef IXGBE_FCOE
363 /* adjust for FCoE Sequence Offload */
364 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
365 && (skb->protocol == htons(ETH_P_FCOE)) &&
366 skb_is_gso(skb)) {
367 hlen = skb_transport_offset(skb) +
368 sizeof(struct fc_frame_header) +
369 sizeof(struct fcoe_crc_eof);
370 segs = DIV_ROUND_UP(skb->len - hlen,
371 skb_shinfo(skb)->gso_size);
372 }
373 #endif /* IXGBE_FCOE */
374 /* multiply data chunks by size of headers */
375 bytecount = ((segs - 1) * hlen) + skb->len;
376 total_packets += segs;
377 total_bytes += bytecount;
378 }
379
380 ixgbe_unmap_and_free_tx_resource(adapter,
381 tx_buffer_info);
382
383 tx_desc->wb.status = 0;
384
385 i++;
386 if (i == tx_ring->count)
387 i = 0;
388 }
389
390 eop = tx_ring->tx_buffer_info[i].next_to_watch;
391 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
392 }
393
394 tx_ring->next_to_clean = i;
395
396 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
397 if (unlikely(count && netif_carrier_ok(netdev) &&
398 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
399 /* Make sure that anybody stopping the queue after this
400 * sees the new next_to_clean.
401 */
402 smp_mb();
403 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
404 !test_bit(__IXGBE_DOWN, &adapter->state)) {
405 netif_wake_subqueue(netdev, tx_ring->queue_index);
406 ++adapter->restart_queue;
407 }
408 }
409
410 if (adapter->detect_tx_hung) {
411 if (ixgbe_check_tx_hang(adapter, tx_ring, i)) {
412 /* schedule immediate reset if we believe we hung */
413 DPRINTK(PROBE, INFO,
414 "tx hang %d detected, resetting adapter\n",
415 adapter->tx_timeout_count + 1);
416 ixgbe_tx_timeout(adapter->netdev);
417 }
418 }
419
420 /* re-arm the interrupt */
421 if (count >= tx_ring->work_limit)
422 ixgbe_irq_rearm_queues(adapter, ((u64)1 << q_vector->v_idx));
423
424 tx_ring->total_bytes += total_bytes;
425 tx_ring->total_packets += total_packets;
426 tx_ring->stats.packets += total_packets;
427 tx_ring->stats.bytes += total_bytes;
428 netdev->stats.tx_bytes += total_bytes;
429 netdev->stats.tx_packets += total_packets;
430 return (count < tx_ring->work_limit);
431 }
432
433 #ifdef CONFIG_IXGBE_DCA
434 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
435 struct ixgbe_ring *rx_ring)
436 {
437 u32 rxctrl;
438 int cpu = get_cpu();
439 int q = rx_ring - adapter->rx_ring;
440
441 if (rx_ring->cpu != cpu) {
442 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
443 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
444 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
445 rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
446 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
447 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
448 rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
449 IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
450 }
451 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
452 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
453 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
454 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_WRO_EN |
455 IXGBE_DCA_RXCTRL_DESC_HSRO_EN);
456 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
457 rx_ring->cpu = cpu;
458 }
459 put_cpu();
460 }
461
462 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
463 struct ixgbe_ring *tx_ring)
464 {
465 u32 txctrl;
466 int cpu = get_cpu();
467 int q = tx_ring - adapter->tx_ring;
468 struct ixgbe_hw *hw = &adapter->hw;
469
470 if (tx_ring->cpu != cpu) {
471 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
472 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(q));
473 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
474 txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
475 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
476 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(q), txctrl);
477 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
478 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(q));
479 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
480 txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
481 IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
482 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
483 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(q), txctrl);
484 }
485 tx_ring->cpu = cpu;
486 }
487 put_cpu();
488 }
489
490 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
491 {
492 int i;
493
494 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
495 return;
496
497 /* always use CB2 mode, difference is masked in the CB driver */
498 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
499
500 for (i = 0; i < adapter->num_tx_queues; i++) {
501 adapter->tx_ring[i].cpu = -1;
502 ixgbe_update_tx_dca(adapter, &adapter->tx_ring[i]);
503 }
504 for (i = 0; i < adapter->num_rx_queues; i++) {
505 adapter->rx_ring[i].cpu = -1;
506 ixgbe_update_rx_dca(adapter, &adapter->rx_ring[i]);
507 }
508 }
509
510 static int __ixgbe_notify_dca(struct device *dev, void *data)
511 {
512 struct net_device *netdev = dev_get_drvdata(dev);
513 struct ixgbe_adapter *adapter = netdev_priv(netdev);
514 unsigned long event = *(unsigned long *)data;
515
516 switch (event) {
517 case DCA_PROVIDER_ADD:
518 /* if we're already enabled, don't do it again */
519 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
520 break;
521 if (dca_add_requester(dev) == 0) {
522 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
523 ixgbe_setup_dca(adapter);
524 break;
525 }
526 /* Fall Through since DCA is disabled. */
527 case DCA_PROVIDER_REMOVE:
528 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
529 dca_remove_requester(dev);
530 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
531 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
532 }
533 break;
534 }
535
536 return 0;
537 }
538
539 #endif /* CONFIG_IXGBE_DCA */
540 /**
541 * ixgbe_receive_skb - Send a completed packet up the stack
542 * @adapter: board private structure
543 * @skb: packet to send up
544 * @status: hardware indication of status of receive
545 * @rx_ring: rx descriptor ring (for a specific queue) to setup
546 * @rx_desc: rx descriptor
547 **/
548 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
549 struct sk_buff *skb, u8 status,
550 struct ixgbe_ring *ring,
551 union ixgbe_adv_rx_desc *rx_desc)
552 {
553 struct ixgbe_adapter *adapter = q_vector->adapter;
554 struct napi_struct *napi = &q_vector->napi;
555 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
556 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
557
558 skb_record_rx_queue(skb, ring->queue_index);
559 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
560 if (adapter->vlgrp && is_vlan && (tag & VLAN_VID_MASK))
561 vlan_gro_receive(napi, adapter->vlgrp, tag, skb);
562 else
563 napi_gro_receive(napi, skb);
564 } else {
565 if (adapter->vlgrp && is_vlan && (tag & VLAN_VID_MASK))
566 vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
567 else
568 netif_rx(skb);
569 }
570 }
571
572 /**
573 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
574 * @adapter: address of board private structure
575 * @status_err: hardware indication of status of receive
576 * @skb: skb currently being received and modified
577 **/
578 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
579 union ixgbe_adv_rx_desc *rx_desc,
580 struct sk_buff *skb)
581 {
582 u32 status_err = le32_to_cpu(rx_desc->wb.upper.status_error);
583
584 skb->ip_summed = CHECKSUM_NONE;
585
586 /* Rx csum disabled */
587 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
588 return;
589
590 /* if IP and error */
591 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
592 (status_err & IXGBE_RXDADV_ERR_IPE)) {
593 adapter->hw_csum_rx_error++;
594 return;
595 }
596
597 if (!(status_err & IXGBE_RXD_STAT_L4CS))
598 return;
599
600 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
601 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
602
603 /*
604 * 82599 errata, UDP frames with a 0 checksum can be marked as
605 * checksum errors.
606 */
607 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
608 (adapter->hw.mac.type == ixgbe_mac_82599EB))
609 return;
610
611 adapter->hw_csum_rx_error++;
612 return;
613 }
614
615 /* It must be a TCP or UDP packet with a valid checksum */
616 skb->ip_summed = CHECKSUM_UNNECESSARY;
617 adapter->hw_csum_rx_good++;
618 }
619
620 static inline void ixgbe_release_rx_desc(struct ixgbe_hw *hw,
621 struct ixgbe_ring *rx_ring, u32 val)
622 {
623 /*
624 * Force memory writes to complete before letting h/w
625 * know there are new descriptors to fetch. (Only
626 * applicable for weak-ordered memory model archs,
627 * such as IA-64).
628 */
629 wmb();
630 IXGBE_WRITE_REG(hw, IXGBE_RDT(rx_ring->reg_idx), val);
631 }
632
633 /**
634 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
635 * @adapter: address of board private structure
636 **/
637 static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
638 struct ixgbe_ring *rx_ring,
639 int cleaned_count)
640 {
641 struct pci_dev *pdev = adapter->pdev;
642 union ixgbe_adv_rx_desc *rx_desc;
643 struct ixgbe_rx_buffer *bi;
644 unsigned int i;
645
646 i = rx_ring->next_to_use;
647 bi = &rx_ring->rx_buffer_info[i];
648
649 while (cleaned_count--) {
650 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
651
652 if (!bi->page_dma &&
653 (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)) {
654 if (!bi->page) {
655 bi->page = alloc_page(GFP_ATOMIC);
656 if (!bi->page) {
657 adapter->alloc_rx_page_failed++;
658 goto no_buffers;
659 }
660 bi->page_offset = 0;
661 } else {
662 /* use a half page if we're re-using */
663 bi->page_offset ^= (PAGE_SIZE / 2);
664 }
665
666 bi->page_dma = pci_map_page(pdev, bi->page,
667 bi->page_offset,
668 (PAGE_SIZE / 2),
669 PCI_DMA_FROMDEVICE);
670 }
671
672 if (!bi->skb) {
673 struct sk_buff *skb;
674 skb = netdev_alloc_skb_ip_align(adapter->netdev,
675 rx_ring->rx_buf_len);
676
677 if (!skb) {
678 adapter->alloc_rx_buff_failed++;
679 goto no_buffers;
680 }
681
682 bi->skb = skb;
683 bi->dma = pci_map_single(pdev, skb->data,
684 rx_ring->rx_buf_len,
685 PCI_DMA_FROMDEVICE);
686 }
687 /* Refresh the desc even if buffer_addrs didn't change because
688 * each write-back erases this info. */
689 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
690 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
691 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
692 } else {
693 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
694 }
695
696 i++;
697 if (i == rx_ring->count)
698 i = 0;
699 bi = &rx_ring->rx_buffer_info[i];
700 }
701
702 no_buffers:
703 if (rx_ring->next_to_use != i) {
704 rx_ring->next_to_use = i;
705 if (i-- == 0)
706 i = (rx_ring->count - 1);
707
708 ixgbe_release_rx_desc(&adapter->hw, rx_ring, i);
709 }
710 }
711
712 static inline u16 ixgbe_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
713 {
714 return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
715 }
716
717 static inline u16 ixgbe_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
718 {
719 return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
720 }
721
722 static inline u32 ixgbe_get_rsc_count(union ixgbe_adv_rx_desc *rx_desc)
723 {
724 return (le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
725 IXGBE_RXDADV_RSCCNT_MASK) >>
726 IXGBE_RXDADV_RSCCNT_SHIFT;
727 }
728
729 /**
730 * ixgbe_transform_rsc_queue - change rsc queue into a full packet
731 * @skb: pointer to the last skb in the rsc queue
732 * @count: pointer to number of packets coalesced in this context
733 *
734 * This function changes a queue full of hw rsc buffers into a completed
735 * packet. It uses the ->prev pointers to find the first packet and then
736 * turns it into the frag list owner.
737 **/
738 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb,
739 u64 *count)
740 {
741 unsigned int frag_list_size = 0;
742
743 while (skb->prev) {
744 struct sk_buff *prev = skb->prev;
745 frag_list_size += skb->len;
746 skb->prev = NULL;
747 skb = prev;
748 *count += 1;
749 }
750
751 skb_shinfo(skb)->frag_list = skb->next;
752 skb->next = NULL;
753 skb->len += frag_list_size;
754 skb->data_len += frag_list_size;
755 skb->truesize += frag_list_size;
756 return skb;
757 }
758
759 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
760 struct ixgbe_ring *rx_ring,
761 int *work_done, int work_to_do)
762 {
763 struct ixgbe_adapter *adapter = q_vector->adapter;
764 struct net_device *netdev = adapter->netdev;
765 struct pci_dev *pdev = adapter->pdev;
766 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
767 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
768 struct sk_buff *skb;
769 unsigned int i, rsc_count = 0;
770 u32 len, staterr;
771 u16 hdr_info;
772 bool cleaned = false;
773 int cleaned_count = 0;
774 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
775 #ifdef IXGBE_FCOE
776 int ddp_bytes = 0;
777 #endif /* IXGBE_FCOE */
778
779 i = rx_ring->next_to_clean;
780 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
781 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
782 rx_buffer_info = &rx_ring->rx_buffer_info[i];
783
784 while (staterr & IXGBE_RXD_STAT_DD) {
785 u32 upper_len = 0;
786 if (*work_done >= work_to_do)
787 break;
788 (*work_done)++;
789
790 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
791 hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
792 len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
793 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
794 if (hdr_info & IXGBE_RXDADV_SPH)
795 adapter->rx_hdr_split++;
796 if (len > IXGBE_RX_HDR_SIZE)
797 len = IXGBE_RX_HDR_SIZE;
798 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
799 } else {
800 len = le16_to_cpu(rx_desc->wb.upper.length);
801 }
802
803 cleaned = true;
804 skb = rx_buffer_info->skb;
805 prefetch(skb->data - NET_IP_ALIGN);
806 rx_buffer_info->skb = NULL;
807
808 if (rx_buffer_info->dma) {
809 pci_unmap_single(pdev, rx_buffer_info->dma,
810 rx_ring->rx_buf_len,
811 PCI_DMA_FROMDEVICE);
812 rx_buffer_info->dma = 0;
813 skb_put(skb, len);
814 }
815
816 if (upper_len) {
817 pci_unmap_page(pdev, rx_buffer_info->page_dma,
818 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
819 rx_buffer_info->page_dma = 0;
820 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
821 rx_buffer_info->page,
822 rx_buffer_info->page_offset,
823 upper_len);
824
825 if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
826 (page_count(rx_buffer_info->page) != 1))
827 rx_buffer_info->page = NULL;
828 else
829 get_page(rx_buffer_info->page);
830
831 skb->len += upper_len;
832 skb->data_len += upper_len;
833 skb->truesize += upper_len;
834 }
835
836 i++;
837 if (i == rx_ring->count)
838 i = 0;
839
840 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
841 prefetch(next_rxd);
842 cleaned_count++;
843
844 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
845 rsc_count = ixgbe_get_rsc_count(rx_desc);
846
847 if (rsc_count) {
848 u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
849 IXGBE_RXDADV_NEXTP_SHIFT;
850 next_buffer = &rx_ring->rx_buffer_info[nextp];
851 } else {
852 next_buffer = &rx_ring->rx_buffer_info[i];
853 }
854
855 if (staterr & IXGBE_RXD_STAT_EOP) {
856 if (skb->prev)
857 skb = ixgbe_transform_rsc_queue(skb, &(rx_ring->rsc_count));
858 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
859 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)
860 rx_ring->rsc_count += skb_shinfo(skb)->nr_frags;
861 else
862 rx_ring->rsc_count++;
863 rx_ring->rsc_flush++;
864 }
865 rx_ring->stats.packets++;
866 rx_ring->stats.bytes += skb->len;
867 } else {
868 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
869 rx_buffer_info->skb = next_buffer->skb;
870 rx_buffer_info->dma = next_buffer->dma;
871 next_buffer->skb = skb;
872 next_buffer->dma = 0;
873 } else {
874 skb->next = next_buffer->skb;
875 skb->next->prev = skb;
876 }
877 adapter->non_eop_descs++;
878 goto next_desc;
879 }
880
881 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
882 dev_kfree_skb_irq(skb);
883 goto next_desc;
884 }
885
886 ixgbe_rx_checksum(adapter, rx_desc, skb);
887
888 /* probably a little skewed due to removing CRC */
889 total_rx_bytes += skb->len;
890 total_rx_packets++;
891
892 skb->protocol = eth_type_trans(skb, adapter->netdev);
893 #ifdef IXGBE_FCOE
894 /* if ddp, not passing to ULD unless for FCP_RSP or error */
895 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
896 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
897 if (!ddp_bytes)
898 goto next_desc;
899 }
900 #endif /* IXGBE_FCOE */
901 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
902
903 next_desc:
904 rx_desc->wb.upper.status_error = 0;
905
906 /* return some buffers to hardware, one at a time is too slow */
907 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
908 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
909 cleaned_count = 0;
910 }
911
912 /* use prefetched values */
913 rx_desc = next_rxd;
914 rx_buffer_info = &rx_ring->rx_buffer_info[i];
915
916 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
917 }
918
919 rx_ring->next_to_clean = i;
920 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
921
922 if (cleaned_count)
923 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
924
925 #ifdef IXGBE_FCOE
926 /* include DDPed FCoE data */
927 if (ddp_bytes > 0) {
928 unsigned int mss;
929
930 mss = adapter->netdev->mtu - sizeof(struct fcoe_hdr) -
931 sizeof(struct fc_frame_header) -
932 sizeof(struct fcoe_crc_eof);
933 if (mss > 512)
934 mss &= ~511;
935 total_rx_bytes += ddp_bytes;
936 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
937 }
938 #endif /* IXGBE_FCOE */
939
940 rx_ring->total_packets += total_rx_packets;
941 rx_ring->total_bytes += total_rx_bytes;
942 netdev->stats.rx_bytes += total_rx_bytes;
943 netdev->stats.rx_packets += total_rx_packets;
944
945 return cleaned;
946 }
947
948 static int ixgbe_clean_rxonly(struct napi_struct *, int);
949 /**
950 * ixgbe_configure_msix - Configure MSI-X hardware
951 * @adapter: board private structure
952 *
953 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
954 * interrupts.
955 **/
956 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
957 {
958 struct ixgbe_q_vector *q_vector;
959 int i, j, q_vectors, v_idx, r_idx;
960 u32 mask;
961
962 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
963
964 /*
965 * Populate the IVAR table and set the ITR values to the
966 * corresponding register.
967 */
968 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
969 q_vector = adapter->q_vector[v_idx];
970 /* XXX for_each_bit(...) */
971 r_idx = find_first_bit(q_vector->rxr_idx,
972 adapter->num_rx_queues);
973
974 for (i = 0; i < q_vector->rxr_count; i++) {
975 j = adapter->rx_ring[r_idx].reg_idx;
976 ixgbe_set_ivar(adapter, 0, j, v_idx);
977 r_idx = find_next_bit(q_vector->rxr_idx,
978 adapter->num_rx_queues,
979 r_idx + 1);
980 }
981 r_idx = find_first_bit(q_vector->txr_idx,
982 adapter->num_tx_queues);
983
984 for (i = 0; i < q_vector->txr_count; i++) {
985 j = adapter->tx_ring[r_idx].reg_idx;
986 ixgbe_set_ivar(adapter, 1, j, v_idx);
987 r_idx = find_next_bit(q_vector->txr_idx,
988 adapter->num_tx_queues,
989 r_idx + 1);
990 }
991
992 if (q_vector->txr_count && !q_vector->rxr_count)
993 /* tx only */
994 q_vector->eitr = adapter->tx_eitr_param;
995 else if (q_vector->rxr_count)
996 /* rx or mixed */
997 q_vector->eitr = adapter->rx_eitr_param;
998
999 ixgbe_write_eitr(q_vector);
1000 }
1001
1002 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
1003 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
1004 v_idx);
1005 else if (adapter->hw.mac.type == ixgbe_mac_82599EB)
1006 ixgbe_set_ivar(adapter, -1, 1, v_idx);
1007 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
1008
1009 /* set up to autoclear timer, and the vectors */
1010 mask = IXGBE_EIMS_ENABLE_MASK;
1011 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
1012 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
1013 }
1014
1015 enum latency_range {
1016 lowest_latency = 0,
1017 low_latency = 1,
1018 bulk_latency = 2,
1019 latency_invalid = 255
1020 };
1021
1022 /**
1023 * ixgbe_update_itr - update the dynamic ITR value based on statistics
1024 * @adapter: pointer to adapter
1025 * @eitr: eitr setting (ints per sec) to give last timeslice
1026 * @itr_setting: current throttle rate in ints/second
1027 * @packets: the number of packets during this measurement interval
1028 * @bytes: the number of bytes during this measurement interval
1029 *
1030 * Stores a new ITR value based on packets and byte
1031 * counts during the last interrupt. The advantage of per interrupt
1032 * computation is faster updates and more accurate ITR for the current
1033 * traffic pattern. Constants in this function were computed
1034 * based on theoretical maximum wire speed and thresholds were set based
1035 * on testing data as well as attempting to minimize response time
1036 * while increasing bulk throughput.
1037 * this functionality is controlled by the InterruptThrottleRate module
1038 * parameter (see ixgbe_param.c)
1039 **/
1040 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
1041 u32 eitr, u8 itr_setting,
1042 int packets, int bytes)
1043 {
1044 unsigned int retval = itr_setting;
1045 u32 timepassed_us;
1046 u64 bytes_perint;
1047
1048 if (packets == 0)
1049 goto update_itr_done;
1050
1051
1052 /* simple throttlerate management
1053 * 0-20MB/s lowest (100000 ints/s)
1054 * 20-100MB/s low (20000 ints/s)
1055 * 100-1249MB/s bulk (8000 ints/s)
1056 */
1057 /* what was last interrupt timeslice? */
1058 timepassed_us = 1000000/eitr;
1059 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1060
1061 switch (itr_setting) {
1062 case lowest_latency:
1063 if (bytes_perint > adapter->eitr_low)
1064 retval = low_latency;
1065 break;
1066 case low_latency:
1067 if (bytes_perint > adapter->eitr_high)
1068 retval = bulk_latency;
1069 else if (bytes_perint <= adapter->eitr_low)
1070 retval = lowest_latency;
1071 break;
1072 case bulk_latency:
1073 if (bytes_perint <= adapter->eitr_high)
1074 retval = low_latency;
1075 break;
1076 }
1077
1078 update_itr_done:
1079 return retval;
1080 }
1081
1082 /**
1083 * ixgbe_write_eitr - write EITR register in hardware specific way
1084 * @q_vector: structure containing interrupt and ring information
1085 *
1086 * This function is made to be called by ethtool and by the driver
1087 * when it needs to update EITR registers at runtime. Hardware
1088 * specific quirks/differences are taken care of here.
1089 */
1090 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1091 {
1092 struct ixgbe_adapter *adapter = q_vector->adapter;
1093 struct ixgbe_hw *hw = &adapter->hw;
1094 int v_idx = q_vector->v_idx;
1095 u32 itr_reg = EITR_INTS_PER_SEC_TO_REG(q_vector->eitr);
1096
1097 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1098 /* must write high and low 16 bits to reset counter */
1099 itr_reg |= (itr_reg << 16);
1100 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1101 /*
1102 * set the WDIS bit to not clear the timer bits and cause an
1103 * immediate assertion of the interrupt
1104 */
1105 itr_reg |= IXGBE_EITR_CNT_WDIS;
1106 }
1107 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1108 }
1109
1110 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
1111 {
1112 struct ixgbe_adapter *adapter = q_vector->adapter;
1113 u32 new_itr;
1114 u8 current_itr, ret_itr;
1115 int i, r_idx;
1116 struct ixgbe_ring *rx_ring, *tx_ring;
1117
1118 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1119 for (i = 0; i < q_vector->txr_count; i++) {
1120 tx_ring = &(adapter->tx_ring[r_idx]);
1121 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1122 q_vector->tx_itr,
1123 tx_ring->total_packets,
1124 tx_ring->total_bytes);
1125 /* if the result for this queue would decrease interrupt
1126 * rate for this vector then use that result */
1127 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
1128 q_vector->tx_itr - 1 : ret_itr);
1129 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1130 r_idx + 1);
1131 }
1132
1133 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1134 for (i = 0; i < q_vector->rxr_count; i++) {
1135 rx_ring = &(adapter->rx_ring[r_idx]);
1136 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1137 q_vector->rx_itr,
1138 rx_ring->total_packets,
1139 rx_ring->total_bytes);
1140 /* if the result for this queue would decrease interrupt
1141 * rate for this vector then use that result */
1142 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
1143 q_vector->rx_itr - 1 : ret_itr);
1144 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1145 r_idx + 1);
1146 }
1147
1148 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1149
1150 switch (current_itr) {
1151 /* counts and packets in update_itr are dependent on these numbers */
1152 case lowest_latency:
1153 new_itr = 100000;
1154 break;
1155 case low_latency:
1156 new_itr = 20000; /* aka hwitr = ~200 */
1157 break;
1158 case bulk_latency:
1159 default:
1160 new_itr = 8000;
1161 break;
1162 }
1163
1164 if (new_itr != q_vector->eitr) {
1165 /* do an exponential smoothing */
1166 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1167
1168 /* save the algorithm value here, not the smoothed one */
1169 q_vector->eitr = new_itr;
1170
1171 ixgbe_write_eitr(q_vector);
1172 }
1173
1174 return;
1175 }
1176
1177 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1178 {
1179 struct ixgbe_hw *hw = &adapter->hw;
1180
1181 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1182 (eicr & IXGBE_EICR_GPI_SDP1)) {
1183 DPRINTK(PROBE, CRIT, "Fan has stopped, replace the adapter\n");
1184 /* write to clear the interrupt */
1185 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1186 }
1187 }
1188
1189 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1190 {
1191 struct ixgbe_hw *hw = &adapter->hw;
1192
1193 if (eicr & IXGBE_EICR_GPI_SDP1) {
1194 /* Clear the interrupt */
1195 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1196 schedule_work(&adapter->multispeed_fiber_task);
1197 } else if (eicr & IXGBE_EICR_GPI_SDP2) {
1198 /* Clear the interrupt */
1199 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1200 schedule_work(&adapter->sfp_config_module_task);
1201 } else {
1202 /* Interrupt isn't for us... */
1203 return;
1204 }
1205 }
1206
1207 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1208 {
1209 struct ixgbe_hw *hw = &adapter->hw;
1210
1211 adapter->lsc_int++;
1212 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1213 adapter->link_check_timeout = jiffies;
1214 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1215 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1216 IXGBE_WRITE_FLUSH(hw);
1217 schedule_work(&adapter->watchdog_task);
1218 }
1219 }
1220
1221 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1222 {
1223 struct net_device *netdev = data;
1224 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1225 struct ixgbe_hw *hw = &adapter->hw;
1226 u32 eicr;
1227
1228 /*
1229 * Workaround for Silicon errata. Use clear-by-write instead
1230 * of clear-by-read. Reading with EICS will return the
1231 * interrupt causes without clearing, which later be done
1232 * with the write to EICR.
1233 */
1234 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1235 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1236
1237 if (eicr & IXGBE_EICR_LSC)
1238 ixgbe_check_lsc(adapter);
1239
1240 if (hw->mac.type == ixgbe_mac_82598EB)
1241 ixgbe_check_fan_failure(adapter, eicr);
1242
1243 if (hw->mac.type == ixgbe_mac_82599EB) {
1244 ixgbe_check_sfp_event(adapter, eicr);
1245
1246 /* Handle Flow Director Full threshold interrupt */
1247 if (eicr & IXGBE_EICR_FLOW_DIR) {
1248 int i;
1249 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_FLOW_DIR);
1250 /* Disable transmits before FDIR Re-initialization */
1251 netif_tx_stop_all_queues(netdev);
1252 for (i = 0; i < adapter->num_tx_queues; i++) {
1253 struct ixgbe_ring *tx_ring =
1254 &adapter->tx_ring[i];
1255 if (test_and_clear_bit(__IXGBE_FDIR_INIT_DONE,
1256 &tx_ring->reinit_state))
1257 schedule_work(&adapter->fdir_reinit_task);
1258 }
1259 }
1260 }
1261 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1262 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
1263
1264 return IRQ_HANDLED;
1265 }
1266
1267 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1268 u64 qmask)
1269 {
1270 u32 mask;
1271
1272 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1273 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1274 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1275 } else {
1276 mask = (qmask & 0xFFFFFFFF);
1277 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(0), mask);
1278 mask = (qmask >> 32);
1279 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(1), mask);
1280 }
1281 /* skip the flush */
1282 }
1283
1284 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1285 u64 qmask)
1286 {
1287 u32 mask;
1288
1289 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1290 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1291 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, mask);
1292 } else {
1293 mask = (qmask & 0xFFFFFFFF);
1294 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), mask);
1295 mask = (qmask >> 32);
1296 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), mask);
1297 }
1298 /* skip the flush */
1299 }
1300
1301 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
1302 {
1303 struct ixgbe_q_vector *q_vector = data;
1304 struct ixgbe_adapter *adapter = q_vector->adapter;
1305 struct ixgbe_ring *tx_ring;
1306 int i, r_idx;
1307
1308 if (!q_vector->txr_count)
1309 return IRQ_HANDLED;
1310
1311 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1312 for (i = 0; i < q_vector->txr_count; i++) {
1313 tx_ring = &(adapter->tx_ring[r_idx]);
1314 tx_ring->total_bytes = 0;
1315 tx_ring->total_packets = 0;
1316 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1317 r_idx + 1);
1318 }
1319
1320 /* disable interrupts on this vector only */
1321 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1322 napi_schedule(&q_vector->napi);
1323
1324 return IRQ_HANDLED;
1325 }
1326
1327 /**
1328 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
1329 * @irq: unused
1330 * @data: pointer to our q_vector struct for this interrupt vector
1331 **/
1332 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
1333 {
1334 struct ixgbe_q_vector *q_vector = data;
1335 struct ixgbe_adapter *adapter = q_vector->adapter;
1336 struct ixgbe_ring *rx_ring;
1337 int r_idx;
1338 int i;
1339
1340 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1341 for (i = 0; i < q_vector->rxr_count; i++) {
1342 rx_ring = &(adapter->rx_ring[r_idx]);
1343 rx_ring->total_bytes = 0;
1344 rx_ring->total_packets = 0;
1345 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1346 r_idx + 1);
1347 }
1348
1349 if (!q_vector->rxr_count)
1350 return IRQ_HANDLED;
1351
1352 /* disable interrupts on this vector only */
1353 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1354 napi_schedule(&q_vector->napi);
1355
1356 return IRQ_HANDLED;
1357 }
1358
1359 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1360 {
1361 struct ixgbe_q_vector *q_vector = data;
1362 struct ixgbe_adapter *adapter = q_vector->adapter;
1363 struct ixgbe_ring *ring;
1364 int r_idx;
1365 int i;
1366
1367 if (!q_vector->txr_count && !q_vector->rxr_count)
1368 return IRQ_HANDLED;
1369
1370 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1371 for (i = 0; i < q_vector->txr_count; i++) {
1372 ring = &(adapter->tx_ring[r_idx]);
1373 ring->total_bytes = 0;
1374 ring->total_packets = 0;
1375 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1376 r_idx + 1);
1377 }
1378
1379 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1380 for (i = 0; i < q_vector->rxr_count; i++) {
1381 ring = &(adapter->rx_ring[r_idx]);
1382 ring->total_bytes = 0;
1383 ring->total_packets = 0;
1384 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1385 r_idx + 1);
1386 }
1387
1388 /* disable interrupts on this vector only */
1389 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1390 napi_schedule(&q_vector->napi);
1391
1392 return IRQ_HANDLED;
1393 }
1394
1395 /**
1396 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1397 * @napi: napi struct with our devices info in it
1398 * @budget: amount of work driver is allowed to do this pass, in packets
1399 *
1400 * This function is optimized for cleaning one queue only on a single
1401 * q_vector!!!
1402 **/
1403 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1404 {
1405 struct ixgbe_q_vector *q_vector =
1406 container_of(napi, struct ixgbe_q_vector, napi);
1407 struct ixgbe_adapter *adapter = q_vector->adapter;
1408 struct ixgbe_ring *rx_ring = NULL;
1409 int work_done = 0;
1410 long r_idx;
1411
1412 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1413 rx_ring = &(adapter->rx_ring[r_idx]);
1414 #ifdef CONFIG_IXGBE_DCA
1415 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1416 ixgbe_update_rx_dca(adapter, rx_ring);
1417 #endif
1418
1419 ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
1420
1421 /* If all Rx work done, exit the polling mode */
1422 if (work_done < budget) {
1423 napi_complete(napi);
1424 if (adapter->rx_itr_setting & 1)
1425 ixgbe_set_itr_msix(q_vector);
1426 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1427 ixgbe_irq_enable_queues(adapter,
1428 ((u64)1 << q_vector->v_idx));
1429 }
1430
1431 return work_done;
1432 }
1433
1434 /**
1435 * ixgbe_clean_rxtx_many - msix (aka one shot) rx clean routine
1436 * @napi: napi struct with our devices info in it
1437 * @budget: amount of work driver is allowed to do this pass, in packets
1438 *
1439 * This function will clean more than one rx queue associated with a
1440 * q_vector.
1441 **/
1442 static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
1443 {
1444 struct ixgbe_q_vector *q_vector =
1445 container_of(napi, struct ixgbe_q_vector, napi);
1446 struct ixgbe_adapter *adapter = q_vector->adapter;
1447 struct ixgbe_ring *ring = NULL;
1448 int work_done = 0, i;
1449 long r_idx;
1450 bool tx_clean_complete = true;
1451
1452 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1453 for (i = 0; i < q_vector->txr_count; i++) {
1454 ring = &(adapter->tx_ring[r_idx]);
1455 #ifdef CONFIG_IXGBE_DCA
1456 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1457 ixgbe_update_tx_dca(adapter, ring);
1458 #endif
1459 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
1460 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1461 r_idx + 1);
1462 }
1463
1464 /* attempt to distribute budget to each queue fairly, but don't allow
1465 * the budget to go below 1 because we'll exit polling */
1466 budget /= (q_vector->rxr_count ?: 1);
1467 budget = max(budget, 1);
1468 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1469 for (i = 0; i < q_vector->rxr_count; i++) {
1470 ring = &(adapter->rx_ring[r_idx]);
1471 #ifdef CONFIG_IXGBE_DCA
1472 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1473 ixgbe_update_rx_dca(adapter, ring);
1474 #endif
1475 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
1476 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1477 r_idx + 1);
1478 }
1479
1480 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1481 ring = &(adapter->rx_ring[r_idx]);
1482 /* If all Rx work done, exit the polling mode */
1483 if (work_done < budget) {
1484 napi_complete(napi);
1485 if (adapter->rx_itr_setting & 1)
1486 ixgbe_set_itr_msix(q_vector);
1487 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1488 ixgbe_irq_enable_queues(adapter,
1489 ((u64)1 << q_vector->v_idx));
1490 return 0;
1491 }
1492
1493 return work_done;
1494 }
1495
1496 /**
1497 * ixgbe_clean_txonly - msix (aka one shot) tx clean routine
1498 * @napi: napi struct with our devices info in it
1499 * @budget: amount of work driver is allowed to do this pass, in packets
1500 *
1501 * This function is optimized for cleaning one queue only on a single
1502 * q_vector!!!
1503 **/
1504 static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
1505 {
1506 struct ixgbe_q_vector *q_vector =
1507 container_of(napi, struct ixgbe_q_vector, napi);
1508 struct ixgbe_adapter *adapter = q_vector->adapter;
1509 struct ixgbe_ring *tx_ring = NULL;
1510 int work_done = 0;
1511 long r_idx;
1512
1513 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1514 tx_ring = &(adapter->tx_ring[r_idx]);
1515 #ifdef CONFIG_IXGBE_DCA
1516 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1517 ixgbe_update_tx_dca(adapter, tx_ring);
1518 #endif
1519
1520 if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
1521 work_done = budget;
1522
1523 /* If all Tx work done, exit the polling mode */
1524 if (work_done < budget) {
1525 napi_complete(napi);
1526 if (adapter->tx_itr_setting & 1)
1527 ixgbe_set_itr_msix(q_vector);
1528 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1529 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
1530 }
1531
1532 return work_done;
1533 }
1534
1535 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
1536 int r_idx)
1537 {
1538 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1539
1540 set_bit(r_idx, q_vector->rxr_idx);
1541 q_vector->rxr_count++;
1542 }
1543
1544 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
1545 int t_idx)
1546 {
1547 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1548
1549 set_bit(t_idx, q_vector->txr_idx);
1550 q_vector->txr_count++;
1551 }
1552
1553 /**
1554 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
1555 * @adapter: board private structure to initialize
1556 * @vectors: allotted vector count for descriptor rings
1557 *
1558 * This function maps descriptor rings to the queue-specific vectors
1559 * we were allotted through the MSI-X enabling code. Ideally, we'd have
1560 * one vector per ring/queue, but on a constrained vector budget, we
1561 * group the rings as "efficiently" as possible. You would add new
1562 * mapping configurations in here.
1563 **/
1564 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
1565 int vectors)
1566 {
1567 int v_start = 0;
1568 int rxr_idx = 0, txr_idx = 0;
1569 int rxr_remaining = adapter->num_rx_queues;
1570 int txr_remaining = adapter->num_tx_queues;
1571 int i, j;
1572 int rqpv, tqpv;
1573 int err = 0;
1574
1575 /* No mapping required if MSI-X is disabled. */
1576 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1577 goto out;
1578
1579 /*
1580 * The ideal configuration...
1581 * We have enough vectors to map one per queue.
1582 */
1583 if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1584 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1585 map_vector_to_rxq(adapter, v_start, rxr_idx);
1586
1587 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1588 map_vector_to_txq(adapter, v_start, txr_idx);
1589
1590 goto out;
1591 }
1592
1593 /*
1594 * If we don't have enough vectors for a 1-to-1
1595 * mapping, we'll have to group them so there are
1596 * multiple queues per vector.
1597 */
1598 /* Re-adjusting *qpv takes care of the remainder. */
1599 for (i = v_start; i < vectors; i++) {
1600 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
1601 for (j = 0; j < rqpv; j++) {
1602 map_vector_to_rxq(adapter, i, rxr_idx);
1603 rxr_idx++;
1604 rxr_remaining--;
1605 }
1606 }
1607 for (i = v_start; i < vectors; i++) {
1608 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
1609 for (j = 0; j < tqpv; j++) {
1610 map_vector_to_txq(adapter, i, txr_idx);
1611 txr_idx++;
1612 txr_remaining--;
1613 }
1614 }
1615
1616 out:
1617 return err;
1618 }
1619
1620 /**
1621 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
1622 * @adapter: board private structure
1623 *
1624 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
1625 * interrupts from the kernel.
1626 **/
1627 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
1628 {
1629 struct net_device *netdev = adapter->netdev;
1630 irqreturn_t (*handler)(int, void *);
1631 int i, vector, q_vectors, err;
1632 int ri=0, ti=0;
1633
1634 /* Decrement for Other and TCP Timer vectors */
1635 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1636
1637 /* Map the Tx/Rx rings to the vectors we were allotted. */
1638 err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
1639 if (err)
1640 goto out;
1641
1642 #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
1643 (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
1644 &ixgbe_msix_clean_many)
1645 for (vector = 0; vector < q_vectors; vector++) {
1646 handler = SET_HANDLER(adapter->q_vector[vector]);
1647
1648 if(handler == &ixgbe_msix_clean_rx) {
1649 sprintf(adapter->name[vector], "%s-%s-%d",
1650 netdev->name, "rx", ri++);
1651 }
1652 else if(handler == &ixgbe_msix_clean_tx) {
1653 sprintf(adapter->name[vector], "%s-%s-%d",
1654 netdev->name, "tx", ti++);
1655 }
1656 else
1657 sprintf(adapter->name[vector], "%s-%s-%d",
1658 netdev->name, "TxRx", vector);
1659
1660 err = request_irq(adapter->msix_entries[vector].vector,
1661 handler, 0, adapter->name[vector],
1662 adapter->q_vector[vector]);
1663 if (err) {
1664 DPRINTK(PROBE, ERR,
1665 "request_irq failed for MSIX interrupt "
1666 "Error: %d\n", err);
1667 goto free_queue_irqs;
1668 }
1669 }
1670
1671 sprintf(adapter->name[vector], "%s:lsc", netdev->name);
1672 err = request_irq(adapter->msix_entries[vector].vector,
1673 ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
1674 if (err) {
1675 DPRINTK(PROBE, ERR,
1676 "request_irq for msix_lsc failed: %d\n", err);
1677 goto free_queue_irqs;
1678 }
1679
1680 return 0;
1681
1682 free_queue_irqs:
1683 for (i = vector - 1; i >= 0; i--)
1684 free_irq(adapter->msix_entries[--vector].vector,
1685 adapter->q_vector[i]);
1686 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
1687 pci_disable_msix(adapter->pdev);
1688 kfree(adapter->msix_entries);
1689 adapter->msix_entries = NULL;
1690 out:
1691 return err;
1692 }
1693
1694 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
1695 {
1696 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1697 u8 current_itr;
1698 u32 new_itr = q_vector->eitr;
1699 struct ixgbe_ring *rx_ring = &adapter->rx_ring[0];
1700 struct ixgbe_ring *tx_ring = &adapter->tx_ring[0];
1701
1702 q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
1703 q_vector->tx_itr,
1704 tx_ring->total_packets,
1705 tx_ring->total_bytes);
1706 q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
1707 q_vector->rx_itr,
1708 rx_ring->total_packets,
1709 rx_ring->total_bytes);
1710
1711 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1712
1713 switch (current_itr) {
1714 /* counts and packets in update_itr are dependent on these numbers */
1715 case lowest_latency:
1716 new_itr = 100000;
1717 break;
1718 case low_latency:
1719 new_itr = 20000; /* aka hwitr = ~200 */
1720 break;
1721 case bulk_latency:
1722 new_itr = 8000;
1723 break;
1724 default:
1725 break;
1726 }
1727
1728 if (new_itr != q_vector->eitr) {
1729 /* do an exponential smoothing */
1730 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1731
1732 /* save the algorithm value here, not the smoothed one */
1733 q_vector->eitr = new_itr;
1734
1735 ixgbe_write_eitr(q_vector);
1736 }
1737
1738 return;
1739 }
1740
1741 /**
1742 * ixgbe_irq_enable - Enable default interrupt generation settings
1743 * @adapter: board private structure
1744 **/
1745 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
1746 {
1747 u32 mask;
1748
1749 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
1750 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
1751 mask |= IXGBE_EIMS_GPI_SDP1;
1752 if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1753 mask |= IXGBE_EIMS_ECC;
1754 mask |= IXGBE_EIMS_GPI_SDP1;
1755 mask |= IXGBE_EIMS_GPI_SDP2;
1756 }
1757 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
1758 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
1759 mask |= IXGBE_EIMS_FLOW_DIR;
1760
1761 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1762 ixgbe_irq_enable_queues(adapter, ~0);
1763 IXGBE_WRITE_FLUSH(&adapter->hw);
1764 }
1765
1766 /**
1767 * ixgbe_intr - legacy mode Interrupt Handler
1768 * @irq: interrupt number
1769 * @data: pointer to a network interface device structure
1770 **/
1771 static irqreturn_t ixgbe_intr(int irq, void *data)
1772 {
1773 struct net_device *netdev = data;
1774 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1775 struct ixgbe_hw *hw = &adapter->hw;
1776 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1777 u32 eicr;
1778
1779 /*
1780 * Workaround for silicon errata. Mask the interrupts
1781 * before the read of EICR.
1782 */
1783 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
1784
1785 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
1786 * therefore no explict interrupt disable is necessary */
1787 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
1788 if (!eicr) {
1789 /* shared interrupt alert!
1790 * make sure interrupts are enabled because the read will
1791 * have disabled interrupts due to EIAM */
1792 ixgbe_irq_enable(adapter);
1793 return IRQ_NONE; /* Not our interrupt */
1794 }
1795
1796 if (eicr & IXGBE_EICR_LSC)
1797 ixgbe_check_lsc(adapter);
1798
1799 if (hw->mac.type == ixgbe_mac_82599EB)
1800 ixgbe_check_sfp_event(adapter, eicr);
1801
1802 ixgbe_check_fan_failure(adapter, eicr);
1803
1804 if (napi_schedule_prep(&(q_vector->napi))) {
1805 adapter->tx_ring[0].total_packets = 0;
1806 adapter->tx_ring[0].total_bytes = 0;
1807 adapter->rx_ring[0].total_packets = 0;
1808 adapter->rx_ring[0].total_bytes = 0;
1809 /* would disable interrupts here but EIAM disabled it */
1810 __napi_schedule(&(q_vector->napi));
1811 }
1812
1813 return IRQ_HANDLED;
1814 }
1815
1816 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
1817 {
1818 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1819
1820 for (i = 0; i < q_vectors; i++) {
1821 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
1822 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
1823 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
1824 q_vector->rxr_count = 0;
1825 q_vector->txr_count = 0;
1826 }
1827 }
1828
1829 /**
1830 * ixgbe_request_irq - initialize interrupts
1831 * @adapter: board private structure
1832 *
1833 * Attempts to configure interrupts using the best available
1834 * capabilities of the hardware and kernel.
1835 **/
1836 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
1837 {
1838 struct net_device *netdev = adapter->netdev;
1839 int err;
1840
1841 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1842 err = ixgbe_request_msix_irqs(adapter);
1843 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
1844 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
1845 netdev->name, netdev);
1846 } else {
1847 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
1848 netdev->name, netdev);
1849 }
1850
1851 if (err)
1852 DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err);
1853
1854 return err;
1855 }
1856
1857 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
1858 {
1859 struct net_device *netdev = adapter->netdev;
1860
1861 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1862 int i, q_vectors;
1863
1864 q_vectors = adapter->num_msix_vectors;
1865
1866 i = q_vectors - 1;
1867 free_irq(adapter->msix_entries[i].vector, netdev);
1868
1869 i--;
1870 for (; i >= 0; i--) {
1871 free_irq(adapter->msix_entries[i].vector,
1872 adapter->q_vector[i]);
1873 }
1874
1875 ixgbe_reset_q_vectors(adapter);
1876 } else {
1877 free_irq(adapter->pdev->irq, netdev);
1878 }
1879 }
1880
1881 /**
1882 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
1883 * @adapter: board private structure
1884 **/
1885 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
1886 {
1887 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1888 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
1889 } else {
1890 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
1891 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
1892 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
1893 }
1894 IXGBE_WRITE_FLUSH(&adapter->hw);
1895 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1896 int i;
1897 for (i = 0; i < adapter->num_msix_vectors; i++)
1898 synchronize_irq(adapter->msix_entries[i].vector);
1899 } else {
1900 synchronize_irq(adapter->pdev->irq);
1901 }
1902 }
1903
1904 /**
1905 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
1906 *
1907 **/
1908 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
1909 {
1910 struct ixgbe_hw *hw = &adapter->hw;
1911
1912 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
1913 EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr_param));
1914
1915 ixgbe_set_ivar(adapter, 0, 0, 0);
1916 ixgbe_set_ivar(adapter, 1, 0, 0);
1917
1918 map_vector_to_rxq(adapter, 0, 0);
1919 map_vector_to_txq(adapter, 0, 0);
1920
1921 DPRINTK(HW, INFO, "Legacy interrupt IVAR setup done\n");
1922 }
1923
1924 /**
1925 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
1926 * @adapter: board private structure
1927 *
1928 * Configure the Tx unit of the MAC after a reset.
1929 **/
1930 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
1931 {
1932 u64 tdba;
1933 struct ixgbe_hw *hw = &adapter->hw;
1934 u32 i, j, tdlen, txctrl;
1935
1936 /* Setup the HW Tx Head and Tail descriptor pointers */
1937 for (i = 0; i < adapter->num_tx_queues; i++) {
1938 struct ixgbe_ring *ring = &adapter->tx_ring[i];
1939 j = ring->reg_idx;
1940 tdba = ring->dma;
1941 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1942 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(j),
1943 (tdba & DMA_BIT_MASK(32)));
1944 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(j), (tdba >> 32));
1945 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(j), tdlen);
1946 IXGBE_WRITE_REG(hw, IXGBE_TDH(j), 0);
1947 IXGBE_WRITE_REG(hw, IXGBE_TDT(j), 0);
1948 adapter->tx_ring[i].head = IXGBE_TDH(j);
1949 adapter->tx_ring[i].tail = IXGBE_TDT(j);
1950 /*
1951 * Disable Tx Head Writeback RO bit, since this hoses
1952 * bookkeeping if things aren't delivered in order.
1953 */
1954 switch (hw->mac.type) {
1955 case ixgbe_mac_82598EB:
1956 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(j));
1957 break;
1958 case ixgbe_mac_82599EB:
1959 default:
1960 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(j));
1961 break;
1962 }
1963 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1964 switch (hw->mac.type) {
1965 case ixgbe_mac_82598EB:
1966 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(j), txctrl);
1967 break;
1968 case ixgbe_mac_82599EB:
1969 default:
1970 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(j), txctrl);
1971 break;
1972 }
1973 }
1974
1975 if (hw->mac.type == ixgbe_mac_82599EB) {
1976 u32 rttdcs;
1977
1978 /* disable the arbiter while setting MTQC */
1979 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
1980 rttdcs |= IXGBE_RTTDCS_ARBDIS;
1981 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
1982
1983 /* We enable 8 traffic classes, DCB only */
1984 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
1985 IXGBE_WRITE_REG(hw, IXGBE_MTQC, (IXGBE_MTQC_RT_ENA |
1986 IXGBE_MTQC_8TC_8TQ));
1987 else
1988 IXGBE_WRITE_REG(hw, IXGBE_MTQC, IXGBE_MTQC_64Q_1PB);
1989
1990 /* re-eable the arbiter */
1991 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
1992 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
1993 }
1994 }
1995
1996 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1997
1998 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
1999 struct ixgbe_ring *rx_ring)
2000 {
2001 u32 srrctl;
2002 int index;
2003 struct ixgbe_ring_feature *feature = adapter->ring_feature;
2004
2005 index = rx_ring->reg_idx;
2006 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2007 unsigned long mask;
2008 mask = (unsigned long) feature[RING_F_RSS].mask;
2009 index = index & mask;
2010 }
2011 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
2012
2013 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
2014 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
2015
2016 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
2017 IXGBE_SRRCTL_BSIZEHDR_MASK;
2018
2019 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2020 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
2021 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2022 #else
2023 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2024 #endif
2025 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
2026 } else {
2027 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
2028 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2029 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
2030 }
2031
2032 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
2033 }
2034
2035 static u32 ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
2036 {
2037 u32 mrqc = 0;
2038 int mask;
2039
2040 if (!(adapter->hw.mac.type == ixgbe_mac_82599EB))
2041 return mrqc;
2042
2043 mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
2044 #ifdef CONFIG_IXGBE_DCB
2045 | IXGBE_FLAG_DCB_ENABLED
2046 #endif
2047 );
2048
2049 switch (mask) {
2050 case (IXGBE_FLAG_RSS_ENABLED):
2051 mrqc = IXGBE_MRQC_RSSEN;
2052 break;
2053 #ifdef CONFIG_IXGBE_DCB
2054 case (IXGBE_FLAG_DCB_ENABLED):
2055 mrqc = IXGBE_MRQC_RT8TCEN;
2056 break;
2057 #endif /* CONFIG_IXGBE_DCB */
2058 default:
2059 break;
2060 }
2061
2062 return mrqc;
2063 }
2064
2065 /**
2066 * ixgbe_configure_rscctl - enable RSC for the indicated ring
2067 * @adapter: address of board private structure
2068 * @index: index of ring to set
2069 * @rx_buf_len: rx buffer length
2070 **/
2071 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter, int index,
2072 int rx_buf_len)
2073 {
2074 struct ixgbe_ring *rx_ring;
2075 struct ixgbe_hw *hw = &adapter->hw;
2076 int j;
2077 u32 rscctrl;
2078
2079 rx_ring = &adapter->rx_ring[index];
2080 j = rx_ring->reg_idx;
2081 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(j));
2082 rscctrl |= IXGBE_RSCCTL_RSCEN;
2083 /*
2084 * we must limit the number of descriptors so that the
2085 * total size of max desc * buf_len is not greater
2086 * than 65535
2087 */
2088 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2089 #if (MAX_SKB_FRAGS > 16)
2090 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2091 #elif (MAX_SKB_FRAGS > 8)
2092 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2093 #elif (MAX_SKB_FRAGS > 4)
2094 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2095 #else
2096 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2097 #endif
2098 } else {
2099 if (rx_buf_len < IXGBE_RXBUFFER_4096)
2100 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2101 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
2102 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2103 else
2104 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2105 }
2106 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(j), rscctrl);
2107 }
2108
2109 /**
2110 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
2111 * @adapter: board private structure
2112 *
2113 * Configure the Rx unit of the MAC after a reset.
2114 **/
2115 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
2116 {
2117 u64 rdba;
2118 struct ixgbe_hw *hw = &adapter->hw;
2119 struct ixgbe_ring *rx_ring;
2120 struct net_device *netdev = adapter->netdev;
2121 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2122 int i, j;
2123 u32 rdlen, rxctrl, rxcsum;
2124 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2125 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2126 0x6A3E67EA, 0x14364D17, 0x3BED200D};
2127 u32 fctrl, hlreg0;
2128 u32 reta = 0, mrqc = 0;
2129 u32 rdrxctl;
2130 int rx_buf_len;
2131
2132 /* Decide whether to use packet split mode or not */
2133 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
2134
2135 /* Set the RX buffer length according to the mode */
2136 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
2137 rx_buf_len = IXGBE_RX_HDR_SIZE;
2138 if (hw->mac.type == ixgbe_mac_82599EB) {
2139 /* PSRTYPE must be initialized in 82599 */
2140 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
2141 IXGBE_PSRTYPE_UDPHDR |
2142 IXGBE_PSRTYPE_IPV4HDR |
2143 IXGBE_PSRTYPE_IPV6HDR |
2144 IXGBE_PSRTYPE_L2HDR;
2145 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(0), psrtype);
2146 }
2147 } else {
2148 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
2149 (netdev->mtu <= ETH_DATA_LEN))
2150 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
2151 else
2152 rx_buf_len = ALIGN(max_frame, 1024);
2153 }
2154
2155 fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
2156 fctrl |= IXGBE_FCTRL_BAM;
2157 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
2158 fctrl |= IXGBE_FCTRL_PMCF;
2159 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
2160
2161 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
2162 if (adapter->netdev->mtu <= ETH_DATA_LEN)
2163 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
2164 else
2165 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2166 #ifdef IXGBE_FCOE
2167 if (netdev->features & NETIF_F_FCOE_MTU)
2168 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2169 #endif
2170 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
2171
2172 rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
2173 /* disable receives while setting up the descriptors */
2174 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2175 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2176
2177 /*
2178 * Setup the HW Rx Head and Tail Descriptor Pointers and
2179 * the Base and Length of the Rx Descriptor Ring
2180 */
2181 for (i = 0; i < adapter->num_rx_queues; i++) {
2182 rx_ring = &adapter->rx_ring[i];
2183 rdba = rx_ring->dma;
2184 j = rx_ring->reg_idx;
2185 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(j), (rdba & DMA_BIT_MASK(32)));
2186 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(j), (rdba >> 32));
2187 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(j), rdlen);
2188 IXGBE_WRITE_REG(hw, IXGBE_RDH(j), 0);
2189 IXGBE_WRITE_REG(hw, IXGBE_RDT(j), 0);
2190 rx_ring->head = IXGBE_RDH(j);
2191 rx_ring->tail = IXGBE_RDT(j);
2192 rx_ring->rx_buf_len = rx_buf_len;
2193
2194 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
2195 rx_ring->flags |= IXGBE_RING_RX_PS_ENABLED;
2196 else
2197 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2198
2199 #ifdef IXGBE_FCOE
2200 if (netdev->features & NETIF_F_FCOE_MTU) {
2201 struct ixgbe_ring_feature *f;
2202 f = &adapter->ring_feature[RING_F_FCOE];
2203 if ((i >= f->mask) && (i < f->mask + f->indices)) {
2204 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2205 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
2206 rx_ring->rx_buf_len =
2207 IXGBE_FCOE_JUMBO_FRAME_SIZE;
2208 }
2209 }
2210
2211 #endif /* IXGBE_FCOE */
2212 ixgbe_configure_srrctl(adapter, rx_ring);
2213 }
2214
2215 if (hw->mac.type == ixgbe_mac_82598EB) {
2216 /*
2217 * For VMDq support of different descriptor types or
2218 * buffer sizes through the use of multiple SRRCTL
2219 * registers, RDRXCTL.MVMEN must be set to 1
2220 *
2221 * also, the manual doesn't mention it clearly but DCA hints
2222 * will only use queue 0's tags unless this bit is set. Side
2223 * effects of setting this bit are only that SRRCTL must be
2224 * fully programmed [0..15]
2225 */
2226 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2227 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
2228 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2229 }
2230
2231 /* Program MRQC for the distribution of queues */
2232 mrqc = ixgbe_setup_mrqc(adapter);
2233
2234 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
2235 /* Fill out redirection table */
2236 for (i = 0, j = 0; i < 128; i++, j++) {
2237 if (j == adapter->ring_feature[RING_F_RSS].indices)
2238 j = 0;
2239 /* reta = 4-byte sliding window of
2240 * 0x00..(indices-1)(indices-1)00..etc. */
2241 reta = (reta << 8) | (j * 0x11);
2242 if ((i & 3) == 3)
2243 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2244 }
2245
2246 /* Fill out hash function seeds */
2247 for (i = 0; i < 10; i++)
2248 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2249
2250 if (hw->mac.type == ixgbe_mac_82598EB)
2251 mrqc |= IXGBE_MRQC_RSSEN;
2252 /* Perform hash on these packet types */
2253 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2254 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2255 | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
2256 | IXGBE_MRQC_RSS_FIELD_IPV6
2257 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
2258 | IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
2259 }
2260 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2261
2262 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2263
2264 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED ||
2265 adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
2266 /* Disable indicating checksum in descriptor, enables
2267 * RSS hash */
2268 rxcsum |= IXGBE_RXCSUM_PCSD;
2269 }
2270 if (!(rxcsum & IXGBE_RXCSUM_PCSD)) {
2271 /* Enable IPv4 payload checksum for UDP fragments
2272 * if PCSD is not set */
2273 rxcsum |= IXGBE_RXCSUM_IPPCSE;
2274 }
2275
2276 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2277
2278 if (hw->mac.type == ixgbe_mac_82599EB) {
2279 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2280 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
2281 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
2282 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2283 }
2284
2285 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
2286 /* Enable 82599 HW-RSC */
2287 for (i = 0; i < adapter->num_rx_queues; i++)
2288 ixgbe_configure_rscctl(adapter, i, rx_buf_len);
2289
2290 /* Disable RSC for ACK packets */
2291 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
2292 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
2293 }
2294 }
2295
2296 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2297 {
2298 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2299 struct ixgbe_hw *hw = &adapter->hw;
2300
2301 /* add VID to filter table */
2302 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, true);
2303 }
2304
2305 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2306 {
2307 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2308 struct ixgbe_hw *hw = &adapter->hw;
2309
2310 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2311 ixgbe_irq_disable(adapter);
2312
2313 vlan_group_set_device(adapter->vlgrp, vid, NULL);
2314
2315 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2316 ixgbe_irq_enable(adapter);
2317
2318 /* remove VID from filter table */
2319 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, false);
2320 }
2321
2322 static void ixgbe_vlan_rx_register(struct net_device *netdev,
2323 struct vlan_group *grp)
2324 {
2325 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2326 u32 ctrl;
2327 int i, j;
2328
2329 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2330 ixgbe_irq_disable(adapter);
2331 adapter->vlgrp = grp;
2332
2333 /*
2334 * For a DCB driver, always enable VLAN tag stripping so we can
2335 * still receive traffic from a DCB-enabled host even if we're
2336 * not in DCB mode.
2337 */
2338 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
2339 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2340 ctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2341 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
2342 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
2343 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
2344 ctrl |= IXGBE_VLNCTRL_VFE;
2345 /* enable VLAN tag insert/strip */
2346 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
2347 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
2348 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
2349 for (i = 0; i < adapter->num_rx_queues; i++) {
2350 j = adapter->rx_ring[i].reg_idx;
2351 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXDCTL(j));
2352 ctrl |= IXGBE_RXDCTL_VME;
2353 IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXDCTL(j), ctrl);
2354 }
2355 }
2356 ixgbe_vlan_rx_add_vid(netdev, 0);
2357
2358 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2359 ixgbe_irq_enable(adapter);
2360 }
2361
2362 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
2363 {
2364 ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2365
2366 if (adapter->vlgrp) {
2367 u16 vid;
2368 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2369 if (!vlan_group_get_device(adapter->vlgrp, vid))
2370 continue;
2371 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
2372 }
2373 }
2374 }
2375
2376 static u8 *ixgbe_addr_list_itr(struct ixgbe_hw *hw, u8 **mc_addr_ptr, u32 *vmdq)
2377 {
2378 struct dev_mc_list *mc_ptr;
2379 u8 *addr = *mc_addr_ptr;
2380 *vmdq = 0;
2381
2382 mc_ptr = container_of(addr, struct dev_mc_list, dmi_addr[0]);
2383 if (mc_ptr->next)
2384 *mc_addr_ptr = mc_ptr->next->dmi_addr;
2385 else
2386 *mc_addr_ptr = NULL;
2387
2388 return addr;
2389 }
2390
2391 /**
2392 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
2393 * @netdev: network interface device structure
2394 *
2395 * The set_rx_method entry point is called whenever the unicast/multicast
2396 * address list or the network interface flags are updated. This routine is
2397 * responsible for configuring the hardware for proper unicast, multicast and
2398 * promiscuous mode.
2399 **/
2400 static void ixgbe_set_rx_mode(struct net_device *netdev)
2401 {
2402 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2403 struct ixgbe_hw *hw = &adapter->hw;
2404 u32 fctrl, vlnctrl;
2405 u8 *addr_list = NULL;
2406 int addr_count = 0;
2407
2408 /* Check for Promiscuous and All Multicast modes */
2409
2410 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
2411 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2412
2413 if (netdev->flags & IFF_PROMISC) {
2414 hw->addr_ctrl.user_set_promisc = 1;
2415 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2416 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
2417 } else {
2418 if (netdev->flags & IFF_ALLMULTI) {
2419 fctrl |= IXGBE_FCTRL_MPE;
2420 fctrl &= ~IXGBE_FCTRL_UPE;
2421 } else {
2422 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2423 }
2424 vlnctrl |= IXGBE_VLNCTRL_VFE;
2425 hw->addr_ctrl.user_set_promisc = 0;
2426 }
2427
2428 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
2429 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2430
2431 /* reprogram secondary unicast list */
2432 hw->mac.ops.update_uc_addr_list(hw, &netdev->uc.list);
2433
2434 /* reprogram multicast list */
2435 addr_count = netdev->mc_count;
2436 if (addr_count)
2437 addr_list = netdev->mc_list->dmi_addr;
2438 hw->mac.ops.update_mc_addr_list(hw, addr_list, addr_count,
2439 ixgbe_addr_list_itr);
2440 }
2441
2442 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
2443 {
2444 int q_idx;
2445 struct ixgbe_q_vector *q_vector;
2446 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2447
2448 /* legacy and MSI only use one vector */
2449 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2450 q_vectors = 1;
2451
2452 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2453 struct napi_struct *napi;
2454 q_vector = adapter->q_vector[q_idx];
2455 napi = &q_vector->napi;
2456 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2457 if (!q_vector->rxr_count || !q_vector->txr_count) {
2458 if (q_vector->txr_count == 1)
2459 napi->poll = &ixgbe_clean_txonly;
2460 else if (q_vector->rxr_count == 1)
2461 napi->poll = &ixgbe_clean_rxonly;
2462 }
2463 }
2464
2465 napi_enable(napi);
2466 }
2467 }
2468
2469 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
2470 {
2471 int q_idx;
2472 struct ixgbe_q_vector *q_vector;
2473 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2474
2475 /* legacy and MSI only use one vector */
2476 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2477 q_vectors = 1;
2478
2479 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2480 q_vector = adapter->q_vector[q_idx];
2481 napi_disable(&q_vector->napi);
2482 }
2483 }
2484
2485 #ifdef CONFIG_IXGBE_DCB
2486 /*
2487 * ixgbe_configure_dcb - Configure DCB hardware
2488 * @adapter: ixgbe adapter struct
2489 *
2490 * This is called by the driver on open to configure the DCB hardware.
2491 * This is also called by the gennetlink interface when reconfiguring
2492 * the DCB state.
2493 */
2494 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
2495 {
2496 struct ixgbe_hw *hw = &adapter->hw;
2497 u32 txdctl, vlnctrl;
2498 int i, j;
2499
2500 ixgbe_dcb_check_config(&adapter->dcb_cfg);
2501 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_TX_CONFIG);
2502 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_RX_CONFIG);
2503
2504 /* reconfigure the hardware */
2505 ixgbe_dcb_hw_config(&adapter->hw, &adapter->dcb_cfg);
2506
2507 for (i = 0; i < adapter->num_tx_queues; i++) {
2508 j = adapter->tx_ring[i].reg_idx;
2509 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2510 /* PThresh workaround for Tx hang with DFP enabled. */
2511 txdctl |= 32;
2512 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2513 }
2514 /* Enable VLAN tag insert/strip */
2515 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2516 if (hw->mac.type == ixgbe_mac_82598EB) {
2517 vlnctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2518 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2519 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2520 } else if (hw->mac.type == ixgbe_mac_82599EB) {
2521 vlnctrl |= IXGBE_VLNCTRL_VFE;
2522 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2523 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2524 for (i = 0; i < adapter->num_rx_queues; i++) {
2525 j = adapter->rx_ring[i].reg_idx;
2526 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2527 vlnctrl |= IXGBE_RXDCTL_VME;
2528 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
2529 }
2530 }
2531 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
2532 }
2533
2534 #endif
2535 static void ixgbe_configure(struct ixgbe_adapter *adapter)
2536 {
2537 struct net_device *netdev = adapter->netdev;
2538 struct ixgbe_hw *hw = &adapter->hw;
2539 int i;
2540
2541 ixgbe_set_rx_mode(netdev);
2542
2543 ixgbe_restore_vlan(adapter);
2544 #ifdef CONFIG_IXGBE_DCB
2545 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2546 if (hw->mac.type == ixgbe_mac_82598EB)
2547 netif_set_gso_max_size(netdev, 32768);
2548 else
2549 netif_set_gso_max_size(netdev, 65536);
2550 ixgbe_configure_dcb(adapter);
2551 } else {
2552 netif_set_gso_max_size(netdev, 65536);
2553 }
2554 #else
2555 netif_set_gso_max_size(netdev, 65536);
2556 #endif
2557
2558 #ifdef IXGBE_FCOE
2559 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
2560 ixgbe_configure_fcoe(adapter);
2561
2562 #endif /* IXGBE_FCOE */
2563 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2564 for (i = 0; i < adapter->num_tx_queues; i++)
2565 adapter->tx_ring[i].atr_sample_rate =
2566 adapter->atr_sample_rate;
2567 ixgbe_init_fdir_signature_82599(hw, adapter->fdir_pballoc);
2568 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
2569 ixgbe_init_fdir_perfect_82599(hw, adapter->fdir_pballoc);
2570 }
2571
2572 ixgbe_configure_tx(adapter);
2573 ixgbe_configure_rx(adapter);
2574 for (i = 0; i < adapter->num_rx_queues; i++)
2575 ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i],
2576 (adapter->rx_ring[i].count - 1));
2577 }
2578
2579 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
2580 {
2581 switch (hw->phy.type) {
2582 case ixgbe_phy_sfp_avago:
2583 case ixgbe_phy_sfp_ftl:
2584 case ixgbe_phy_sfp_intel:
2585 case ixgbe_phy_sfp_unknown:
2586 case ixgbe_phy_tw_tyco:
2587 case ixgbe_phy_tw_unknown:
2588 return true;
2589 default:
2590 return false;
2591 }
2592 }
2593
2594 /**
2595 * ixgbe_sfp_link_config - set up SFP+ link
2596 * @adapter: pointer to private adapter struct
2597 **/
2598 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
2599 {
2600 struct ixgbe_hw *hw = &adapter->hw;
2601
2602 if (hw->phy.multispeed_fiber) {
2603 /*
2604 * In multispeed fiber setups, the device may not have
2605 * had a physical connection when the driver loaded.
2606 * If that's the case, the initial link configuration
2607 * couldn't get the MAC into 10G or 1G mode, so we'll
2608 * never have a link status change interrupt fire.
2609 * We need to try and force an autonegotiation
2610 * session, then bring up link.
2611 */
2612 hw->mac.ops.setup_sfp(hw);
2613 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
2614 schedule_work(&adapter->multispeed_fiber_task);
2615 } else {
2616 /*
2617 * Direct Attach Cu and non-multispeed fiber modules
2618 * still need to be configured properly prior to
2619 * attempting link.
2620 */
2621 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_MOD_TASK))
2622 schedule_work(&adapter->sfp_config_module_task);
2623 }
2624 }
2625
2626 /**
2627 * ixgbe_non_sfp_link_config - set up non-SFP+ link
2628 * @hw: pointer to private hardware struct
2629 *
2630 * Returns 0 on success, negative on failure
2631 **/
2632 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
2633 {
2634 u32 autoneg;
2635 bool negotiation, link_up = false;
2636 u32 ret = IXGBE_ERR_LINK_SETUP;
2637
2638 if (hw->mac.ops.check_link)
2639 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
2640
2641 if (ret)
2642 goto link_cfg_out;
2643
2644 if (hw->mac.ops.get_link_capabilities)
2645 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
2646 if (ret)
2647 goto link_cfg_out;
2648
2649 if (hw->mac.ops.setup_link)
2650 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
2651 link_cfg_out:
2652 return ret;
2653 }
2654
2655 #define IXGBE_MAX_RX_DESC_POLL 10
2656 static inline void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
2657 int rxr)
2658 {
2659 int j = adapter->rx_ring[rxr].reg_idx;
2660 int k;
2661
2662 for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) {
2663 if (IXGBE_READ_REG(&adapter->hw,
2664 IXGBE_RXDCTL(j)) & IXGBE_RXDCTL_ENABLE)
2665 break;
2666 else
2667 msleep(1);
2668 }
2669 if (k >= IXGBE_MAX_RX_DESC_POLL) {
2670 DPRINTK(DRV, ERR, "RXDCTL.ENABLE on Rx queue %d "
2671 "not set within the polling period\n", rxr);
2672 }
2673 ixgbe_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr],
2674 (adapter->rx_ring[rxr].count - 1));
2675 }
2676
2677 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
2678 {
2679 struct net_device *netdev = adapter->netdev;
2680 struct ixgbe_hw *hw = &adapter->hw;
2681 int i, j = 0;
2682 int num_rx_rings = adapter->num_rx_queues;
2683 int err;
2684 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2685 u32 txdctl, rxdctl, mhadd;
2686 u32 dmatxctl;
2687 u32 gpie;
2688
2689 ixgbe_get_hw_control(adapter);
2690
2691 if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) ||
2692 (adapter->flags & IXGBE_FLAG_MSI_ENABLED)) {
2693 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2694 gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
2695 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
2696 } else {
2697 /* MSI only */
2698 gpie = 0;
2699 }
2700 /* XXX: to interrupt immediately for EICS writes, enable this */
2701 /* gpie |= IXGBE_GPIE_EIMEN; */
2702 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2703 }
2704
2705 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
2706 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
2707 * specifically only auto mask tx and rx interrupts */
2708 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
2709 }
2710
2711 /* Enable fan failure interrupt if media type is copper */
2712 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2713 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2714 gpie |= IXGBE_SDP1_GPIEN;
2715 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2716 }
2717
2718 if (hw->mac.type == ixgbe_mac_82599EB) {
2719 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2720 gpie |= IXGBE_SDP1_GPIEN;
2721 gpie |= IXGBE_SDP2_GPIEN;
2722 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2723 }
2724
2725 #ifdef IXGBE_FCOE
2726 /* adjust max frame to be able to do baby jumbo for FCoE */
2727 if ((netdev->features & NETIF_F_FCOE_MTU) &&
2728 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
2729 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
2730
2731 #endif /* IXGBE_FCOE */
2732 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
2733 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
2734 mhadd &= ~IXGBE_MHADD_MFS_MASK;
2735 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
2736
2737 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
2738 }
2739
2740 for (i = 0; i < adapter->num_tx_queues; i++) {
2741 j = adapter->tx_ring[i].reg_idx;
2742 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2743 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
2744 txdctl |= (8 << 16);
2745 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2746 }
2747
2748 if (hw->mac.type == ixgbe_mac_82599EB) {
2749 /* DMATXCTL.EN must be set after all Tx queue config is done */
2750 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2751 dmatxctl |= IXGBE_DMATXCTL_TE;
2752 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2753 }
2754 for (i = 0; i < adapter->num_tx_queues; i++) {
2755 j = adapter->tx_ring[i].reg_idx;
2756 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2757 txdctl |= IXGBE_TXDCTL_ENABLE;
2758 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2759 }
2760
2761 for (i = 0; i < num_rx_rings; i++) {
2762 j = adapter->rx_ring[i].reg_idx;
2763 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2764 /* enable PTHRESH=32 descriptors (half the internal cache)
2765 * and HTHRESH=0 descriptors (to minimize latency on fetch),
2766 * this also removes a pesky rx_no_buffer_count increment */
2767 rxdctl |= 0x0020;
2768 rxdctl |= IXGBE_RXDCTL_ENABLE;
2769 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), rxdctl);
2770 if (hw->mac.type == ixgbe_mac_82599EB)
2771 ixgbe_rx_desc_queue_enable(adapter, i);
2772 }
2773 /* enable all receives */
2774 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2775 if (hw->mac.type == ixgbe_mac_82598EB)
2776 rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
2777 else
2778 rxdctl |= IXGBE_RXCTRL_RXEN;
2779 hw->mac.ops.enable_rx_dma(hw, rxdctl);
2780
2781 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2782 ixgbe_configure_msix(adapter);
2783 else
2784 ixgbe_configure_msi_and_legacy(adapter);
2785
2786 clear_bit(__IXGBE_DOWN, &adapter->state);
2787 ixgbe_napi_enable_all(adapter);
2788
2789 /* clear any pending interrupts, may auto mask */
2790 IXGBE_READ_REG(hw, IXGBE_EICR);
2791
2792 ixgbe_irq_enable(adapter);
2793
2794 /*
2795 * If this adapter has a fan, check to see if we had a failure
2796 * before we enabled the interrupt.
2797 */
2798 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2799 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
2800 if (esdp & IXGBE_ESDP_SDP1)
2801 DPRINTK(DRV, CRIT,
2802 "Fan has stopped, replace the adapter\n");
2803 }
2804
2805 /*
2806 * For hot-pluggable SFP+ devices, a new SFP+ module may have
2807 * arrived before interrupts were enabled but after probe. Such
2808 * devices wouldn't have their type identified yet. We need to
2809 * kick off the SFP+ module setup first, then try to bring up link.
2810 * If we're not hot-pluggable SFP+, we just need to configure link
2811 * and bring it up.
2812 */
2813 if (hw->phy.type == ixgbe_phy_unknown) {
2814 err = hw->phy.ops.identify(hw);
2815 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
2816 /*
2817 * Take the device down and schedule the sfp tasklet
2818 * which will unregister_netdev and log it.
2819 */
2820 ixgbe_down(adapter);
2821 schedule_work(&adapter->sfp_config_module_task);
2822 return err;
2823 }
2824 }
2825
2826 if (ixgbe_is_sfp(hw)) {
2827 ixgbe_sfp_link_config(adapter);
2828 } else {
2829 err = ixgbe_non_sfp_link_config(hw);
2830 if (err)
2831 DPRINTK(PROBE, ERR, "link_config FAILED %d\n", err);
2832 }
2833
2834 for (i = 0; i < adapter->num_tx_queues; i++)
2835 set_bit(__IXGBE_FDIR_INIT_DONE,
2836 &(adapter->tx_ring[i].reinit_state));
2837
2838 /* enable transmits */
2839 netif_tx_start_all_queues(netdev);
2840
2841 /* bring the link up in the watchdog, this could race with our first
2842 * link up interrupt but shouldn't be a problem */
2843 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2844 adapter->link_check_timeout = jiffies;
2845 mod_timer(&adapter->watchdog_timer, jiffies);
2846 return 0;
2847 }
2848
2849 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
2850 {
2851 WARN_ON(in_interrupt());
2852 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
2853 msleep(1);
2854 ixgbe_down(adapter);
2855 ixgbe_up(adapter);
2856 clear_bit(__IXGBE_RESETTING, &adapter->state);
2857 }
2858
2859 int ixgbe_up(struct ixgbe_adapter *adapter)
2860 {
2861 /* hardware has been reset, we need to reload some things */
2862 ixgbe_configure(adapter);
2863
2864 return ixgbe_up_complete(adapter);
2865 }
2866
2867 void ixgbe_reset(struct ixgbe_adapter *adapter)
2868 {
2869 struct ixgbe_hw *hw = &adapter->hw;
2870 int err;
2871
2872 err = hw->mac.ops.init_hw(hw);
2873 switch (err) {
2874 case 0:
2875 case IXGBE_ERR_SFP_NOT_PRESENT:
2876 break;
2877 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
2878 dev_err(&adapter->pdev->dev, "master disable timed out\n");
2879 break;
2880 case IXGBE_ERR_EEPROM_VERSION:
2881 /* We are running on a pre-production device, log a warning */
2882 dev_warn(&adapter->pdev->dev, "This device is a pre-production "
2883 "adapter/LOM. Please be aware there may be issues "
2884 "associated with your hardware. If you are "
2885 "experiencing problems please contact your Intel or "
2886 "hardware representative who provided you with this "
2887 "hardware.\n");
2888 break;
2889 default:
2890 dev_err(&adapter->pdev->dev, "Hardware Error: %d\n", err);
2891 }
2892
2893 /* reprogram the RAR[0] in case user changed it. */
2894 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
2895 }
2896
2897 /**
2898 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
2899 * @adapter: board private structure
2900 * @rx_ring: ring to free buffers from
2901 **/
2902 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
2903 struct ixgbe_ring *rx_ring)
2904 {
2905 struct pci_dev *pdev = adapter->pdev;
2906 unsigned long size;
2907 unsigned int i;
2908
2909 /* Free all the Rx ring sk_buffs */
2910
2911 for (i = 0; i < rx_ring->count; i++) {
2912 struct ixgbe_rx_buffer *rx_buffer_info;
2913
2914 rx_buffer_info = &rx_ring->rx_buffer_info[i];
2915 if (rx_buffer_info->dma) {
2916 pci_unmap_single(pdev, rx_buffer_info->dma,
2917 rx_ring->rx_buf_len,
2918 PCI_DMA_FROMDEVICE);
2919 rx_buffer_info->dma = 0;
2920 }
2921 if (rx_buffer_info->skb) {
2922 struct sk_buff *skb = rx_buffer_info->skb;
2923 rx_buffer_info->skb = NULL;
2924 do {
2925 struct sk_buff *this = skb;
2926 skb = skb->prev;
2927 dev_kfree_skb(this);
2928 } while (skb);
2929 }
2930 if (!rx_buffer_info->page)
2931 continue;
2932 if (rx_buffer_info->page_dma) {
2933 pci_unmap_page(pdev, rx_buffer_info->page_dma,
2934 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
2935 rx_buffer_info->page_dma = 0;
2936 }
2937 put_page(rx_buffer_info->page);
2938 rx_buffer_info->page = NULL;
2939 rx_buffer_info->page_offset = 0;
2940 }
2941
2942 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
2943 memset(rx_ring->rx_buffer_info, 0, size);
2944
2945 /* Zero out the descriptor ring */
2946 memset(rx_ring->desc, 0, rx_ring->size);
2947
2948 rx_ring->next_to_clean = 0;
2949 rx_ring->next_to_use = 0;
2950
2951 if (rx_ring->head)
2952 writel(0, adapter->hw.hw_addr + rx_ring->head);
2953 if (rx_ring->tail)
2954 writel(0, adapter->hw.hw_addr + rx_ring->tail);
2955 }
2956
2957 /**
2958 * ixgbe_clean_tx_ring - Free Tx Buffers
2959 * @adapter: board private structure
2960 * @tx_ring: ring to be cleaned
2961 **/
2962 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
2963 struct ixgbe_ring *tx_ring)
2964 {
2965 struct ixgbe_tx_buffer *tx_buffer_info;
2966 unsigned long size;
2967 unsigned int i;
2968
2969 /* Free all the Tx ring sk_buffs */
2970
2971 for (i = 0; i < tx_ring->count; i++) {
2972 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2973 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
2974 }
2975
2976 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
2977 memset(tx_ring->tx_buffer_info, 0, size);
2978
2979 /* Zero out the descriptor ring */
2980 memset(tx_ring->desc, 0, tx_ring->size);
2981
2982 tx_ring->next_to_use = 0;
2983 tx_ring->next_to_clean = 0;
2984
2985 if (tx_ring->head)
2986 writel(0, adapter->hw.hw_addr + tx_ring->head);
2987 if (tx_ring->tail)
2988 writel(0, adapter->hw.hw_addr + tx_ring->tail);
2989 }
2990
2991 /**
2992 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
2993 * @adapter: board private structure
2994 **/
2995 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
2996 {
2997 int i;
2998
2999 for (i = 0; i < adapter->num_rx_queues; i++)
3000 ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
3001 }
3002
3003 /**
3004 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
3005 * @adapter: board private structure
3006 **/
3007 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
3008 {
3009 int i;
3010
3011 for (i = 0; i < adapter->num_tx_queues; i++)
3012 ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
3013 }
3014
3015 void ixgbe_down(struct ixgbe_adapter *adapter)
3016 {
3017 struct net_device *netdev = adapter->netdev;
3018 struct ixgbe_hw *hw = &adapter->hw;
3019 u32 rxctrl;
3020 u32 txdctl;
3021 int i, j;
3022
3023 /* signal that we are down to the interrupt handler */
3024 set_bit(__IXGBE_DOWN, &adapter->state);
3025
3026 /* disable receives */
3027 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3028 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3029
3030 netif_tx_disable(netdev);
3031
3032 IXGBE_WRITE_FLUSH(hw);
3033 msleep(10);
3034
3035 netif_tx_stop_all_queues(netdev);
3036
3037 ixgbe_irq_disable(adapter);
3038
3039 ixgbe_napi_disable_all(adapter);
3040
3041 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3042 del_timer_sync(&adapter->sfp_timer);
3043 del_timer_sync(&adapter->watchdog_timer);
3044 cancel_work_sync(&adapter->watchdog_task);
3045
3046 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3047 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
3048 cancel_work_sync(&adapter->fdir_reinit_task);
3049
3050 /* disable transmits in the hardware now that interrupts are off */
3051 for (i = 0; i < adapter->num_tx_queues; i++) {
3052 j = adapter->tx_ring[i].reg_idx;
3053 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3054 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
3055 (txdctl & ~IXGBE_TXDCTL_ENABLE));
3056 }
3057 /* Disable the Tx DMA engine on 82599 */
3058 if (hw->mac.type == ixgbe_mac_82599EB)
3059 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
3060 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
3061 ~IXGBE_DMATXCTL_TE));
3062
3063 netif_carrier_off(netdev);
3064
3065 if (!pci_channel_offline(adapter->pdev))
3066 ixgbe_reset(adapter);
3067 ixgbe_clean_all_tx_rings(adapter);
3068 ixgbe_clean_all_rx_rings(adapter);
3069
3070 #ifdef CONFIG_IXGBE_DCA
3071 /* since we reset the hardware DCA settings were cleared */
3072 ixgbe_setup_dca(adapter);
3073 #endif
3074 }
3075
3076 /**
3077 * ixgbe_poll - NAPI Rx polling callback
3078 * @napi: structure for representing this polling device
3079 * @budget: how many packets driver is allowed to clean
3080 *
3081 * This function is used for legacy and MSI, NAPI mode
3082 **/
3083 static int ixgbe_poll(struct napi_struct *napi, int budget)
3084 {
3085 struct ixgbe_q_vector *q_vector =
3086 container_of(napi, struct ixgbe_q_vector, napi);
3087 struct ixgbe_adapter *adapter = q_vector->adapter;
3088 int tx_clean_complete, work_done = 0;
3089
3090 #ifdef CONFIG_IXGBE_DCA
3091 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
3092 ixgbe_update_tx_dca(adapter, adapter->tx_ring);
3093 ixgbe_update_rx_dca(adapter, adapter->rx_ring);
3094 }
3095 #endif
3096
3097 tx_clean_complete = ixgbe_clean_tx_irq(q_vector, adapter->tx_ring);
3098 ixgbe_clean_rx_irq(q_vector, adapter->rx_ring, &work_done, budget);
3099
3100 if (!tx_clean_complete)
3101 work_done = budget;
3102
3103 /* If budget not fully consumed, exit the polling mode */
3104 if (work_done < budget) {
3105 napi_complete(napi);
3106 if (adapter->rx_itr_setting & 1)
3107 ixgbe_set_itr(adapter);
3108 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3109 ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
3110 }
3111 return work_done;
3112 }
3113
3114 /**
3115 * ixgbe_tx_timeout - Respond to a Tx Hang
3116 * @netdev: network interface device structure
3117 **/
3118 static void ixgbe_tx_timeout(struct net_device *netdev)
3119 {
3120 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3121
3122 /* Do the reset outside of interrupt context */
3123 schedule_work(&adapter->reset_task);
3124 }
3125
3126 static void ixgbe_reset_task(struct work_struct *work)
3127 {
3128 struct ixgbe_adapter *adapter;
3129 adapter = container_of(work, struct ixgbe_adapter, reset_task);
3130
3131 /* If we're already down or resetting, just bail */
3132 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
3133 test_bit(__IXGBE_RESETTING, &adapter->state))
3134 return;
3135
3136 adapter->tx_timeout_count++;
3137
3138 ixgbe_reinit_locked(adapter);
3139 }
3140
3141 #ifdef CONFIG_IXGBE_DCB
3142 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
3143 {
3144 bool ret = false;
3145 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_DCB];
3146
3147 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
3148 return ret;
3149
3150 f->mask = 0x7 << 3;
3151 adapter->num_rx_queues = f->indices;
3152 adapter->num_tx_queues = f->indices;
3153 ret = true;
3154
3155 return ret;
3156 }
3157 #endif
3158
3159 /**
3160 * ixgbe_set_rss_queues: Allocate queues for RSS
3161 * @adapter: board private structure to initialize
3162 *
3163 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
3164 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
3165 *
3166 **/
3167 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
3168 {
3169 bool ret = false;
3170 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
3171
3172 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3173 f->mask = 0xF;
3174 adapter->num_rx_queues = f->indices;
3175 adapter->num_tx_queues = f->indices;
3176 ret = true;
3177 } else {
3178 ret = false;
3179 }
3180
3181 return ret;
3182 }
3183
3184 /**
3185 * ixgbe_set_fdir_queues: Allocate queues for Flow Director
3186 * @adapter: board private structure to initialize
3187 *
3188 * Flow Director is an advanced Rx filter, attempting to get Rx flows back
3189 * to the original CPU that initiated the Tx session. This runs in addition
3190 * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
3191 * Rx load across CPUs using RSS.
3192 *
3193 **/
3194 static bool inline ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
3195 {
3196 bool ret = false;
3197 struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
3198
3199 f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
3200 f_fdir->mask = 0;
3201
3202 /* Flow Director must have RSS enabled */
3203 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3204 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3205 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)))) {
3206 adapter->num_tx_queues = f_fdir->indices;
3207 adapter->num_rx_queues = f_fdir->indices;
3208 ret = true;
3209 } else {
3210 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3211 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3212 }
3213 return ret;
3214 }
3215
3216 #ifdef IXGBE_FCOE
3217 /**
3218 * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
3219 * @adapter: board private structure to initialize
3220 *
3221 * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
3222 * The ring feature mask is not used as a mask for FCoE, as it can take any 8
3223 * rx queues out of the max number of rx queues, instead, it is used as the
3224 * index of the first rx queue used by FCoE.
3225 *
3226 **/
3227 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
3228 {
3229 bool ret = false;
3230 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3231
3232 f->indices = min((int)num_online_cpus(), f->indices);
3233 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3234 adapter->num_rx_queues = 1;
3235 adapter->num_tx_queues = 1;
3236 #ifdef CONFIG_IXGBE_DCB
3237 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3238 DPRINTK(PROBE, INFO, "FCoE enabled with DCB \n");
3239 ixgbe_set_dcb_queues(adapter);
3240 }
3241 #endif
3242 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3243 DPRINTK(PROBE, INFO, "FCoE enabled with RSS \n");
3244 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3245 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3246 ixgbe_set_fdir_queues(adapter);
3247 else
3248 ixgbe_set_rss_queues(adapter);
3249 }
3250 /* adding FCoE rx rings to the end */
3251 f->mask = adapter->num_rx_queues;
3252 adapter->num_rx_queues += f->indices;
3253 adapter->num_tx_queues += f->indices;
3254
3255 ret = true;
3256 }
3257
3258 return ret;
3259 }
3260
3261 #endif /* IXGBE_FCOE */
3262 /*
3263 * ixgbe_set_num_queues: Allocate queues for device, feature dependant
3264 * @adapter: board private structure to initialize
3265 *
3266 * This is the top level queue allocation routine. The order here is very
3267 * important, starting with the "most" number of features turned on at once,
3268 * and ending with the smallest set of features. This way large combinations
3269 * can be allocated if they're turned on, and smaller combinations are the
3270 * fallthrough conditions.
3271 *
3272 **/
3273 static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
3274 {
3275 #ifdef IXGBE_FCOE
3276 if (ixgbe_set_fcoe_queues(adapter))
3277 goto done;
3278
3279 #endif /* IXGBE_FCOE */
3280 #ifdef CONFIG_IXGBE_DCB
3281 if (ixgbe_set_dcb_queues(adapter))
3282 goto done;
3283
3284 #endif
3285 if (ixgbe_set_fdir_queues(adapter))
3286 goto done;
3287
3288 if (ixgbe_set_rss_queues(adapter))
3289 goto done;
3290
3291 /* fallback to base case */
3292 adapter->num_rx_queues = 1;
3293 adapter->num_tx_queues = 1;
3294
3295 done:
3296 /* Notify the stack of the (possibly) reduced Tx Queue count. */
3297 adapter->netdev->real_num_tx_queues = adapter->num_tx_queues;
3298 }
3299
3300 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
3301 int vectors)
3302 {
3303 int err, vector_threshold;
3304
3305 /* We'll want at least 3 (vector_threshold):
3306 * 1) TxQ[0] Cleanup
3307 * 2) RxQ[0] Cleanup
3308 * 3) Other (Link Status Change, etc.)
3309 * 4) TCP Timer (optional)
3310 */
3311 vector_threshold = MIN_MSIX_COUNT;
3312
3313 /* The more we get, the more we will assign to Tx/Rx Cleanup
3314 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
3315 * Right now, we simply care about how many we'll get; we'll
3316 * set them up later while requesting irq's.
3317 */
3318 while (vectors >= vector_threshold) {
3319 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
3320 vectors);
3321 if (!err) /* Success in acquiring all requested vectors. */
3322 break;
3323 else if (err < 0)
3324 vectors = 0; /* Nasty failure, quit now */
3325 else /* err == number of vectors we should try again with */
3326 vectors = err;
3327 }
3328
3329 if (vectors < vector_threshold) {
3330 /* Can't allocate enough MSI-X interrupts? Oh well.
3331 * This just means we'll go with either a single MSI
3332 * vector or fall back to legacy interrupts.
3333 */
3334 DPRINTK(HW, DEBUG, "Unable to allocate MSI-X interrupts\n");
3335 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3336 kfree(adapter->msix_entries);
3337 adapter->msix_entries = NULL;
3338 } else {
3339 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
3340 /*
3341 * Adjust for only the vectors we'll use, which is minimum
3342 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
3343 * vectors we were allocated.
3344 */
3345 adapter->num_msix_vectors = min(vectors,
3346 adapter->max_msix_q_vectors + NON_Q_VECTORS);
3347 }
3348 }
3349
3350 /**
3351 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
3352 * @adapter: board private structure to initialize
3353 *
3354 * Cache the descriptor ring offsets for RSS to the assigned rings.
3355 *
3356 **/
3357 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
3358 {
3359 int i;
3360 bool ret = false;
3361
3362 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3363 for (i = 0; i < adapter->num_rx_queues; i++)
3364 adapter->rx_ring[i].reg_idx = i;
3365 for (i = 0; i < adapter->num_tx_queues; i++)
3366 adapter->tx_ring[i].reg_idx = i;
3367 ret = true;
3368 } else {
3369 ret = false;
3370 }
3371
3372 return ret;
3373 }
3374
3375 #ifdef CONFIG_IXGBE_DCB
3376 /**
3377 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
3378 * @adapter: board private structure to initialize
3379 *
3380 * Cache the descriptor ring offsets for DCB to the assigned rings.
3381 *
3382 **/
3383 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
3384 {
3385 int i;
3386 bool ret = false;
3387 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
3388
3389 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3390 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
3391 /* the number of queues is assumed to be symmetric */
3392 for (i = 0; i < dcb_i; i++) {
3393 adapter->rx_ring[i].reg_idx = i << 3;
3394 adapter->tx_ring[i].reg_idx = i << 2;
3395 }
3396 ret = true;
3397 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
3398 if (dcb_i == 8) {
3399 /*
3400 * Tx TC0 starts at: descriptor queue 0
3401 * Tx TC1 starts at: descriptor queue 32
3402 * Tx TC2 starts at: descriptor queue 64
3403 * Tx TC3 starts at: descriptor queue 80
3404 * Tx TC4 starts at: descriptor queue 96
3405 * Tx TC5 starts at: descriptor queue 104
3406 * Tx TC6 starts at: descriptor queue 112
3407 * Tx TC7 starts at: descriptor queue 120
3408 *
3409 * Rx TC0-TC7 are offset by 16 queues each
3410 */
3411 for (i = 0; i < 3; i++) {
3412 adapter->tx_ring[i].reg_idx = i << 5;
3413 adapter->rx_ring[i].reg_idx = i << 4;
3414 }
3415 for ( ; i < 5; i++) {
3416 adapter->tx_ring[i].reg_idx =
3417 ((i + 2) << 4);
3418 adapter->rx_ring[i].reg_idx = i << 4;
3419 }
3420 for ( ; i < dcb_i; i++) {
3421 adapter->tx_ring[i].reg_idx =
3422 ((i + 8) << 3);
3423 adapter->rx_ring[i].reg_idx = i << 4;
3424 }
3425
3426 ret = true;
3427 } else if (dcb_i == 4) {
3428 /*
3429 * Tx TC0 starts at: descriptor queue 0
3430 * Tx TC1 starts at: descriptor queue 64
3431 * Tx TC2 starts at: descriptor queue 96
3432 * Tx TC3 starts at: descriptor queue 112
3433 *
3434 * Rx TC0-TC3 are offset by 32 queues each
3435 */
3436 adapter->tx_ring[0].reg_idx = 0;
3437 adapter->tx_ring[1].reg_idx = 64;
3438 adapter->tx_ring[2].reg_idx = 96;
3439 adapter->tx_ring[3].reg_idx = 112;
3440 for (i = 0 ; i < dcb_i; i++)
3441 adapter->rx_ring[i].reg_idx = i << 5;
3442
3443 ret = true;
3444 } else {
3445 ret = false;
3446 }
3447 } else {
3448 ret = false;
3449 }
3450 } else {
3451 ret = false;
3452 }
3453
3454 return ret;
3455 }
3456 #endif
3457
3458 /**
3459 * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
3460 * @adapter: board private structure to initialize
3461 *
3462 * Cache the descriptor ring offsets for Flow Director to the assigned rings.
3463 *
3464 **/
3465 static bool inline ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
3466 {
3467 int i;
3468 bool ret = false;
3469
3470 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3471 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3472 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))) {
3473 for (i = 0; i < adapter->num_rx_queues; i++)
3474 adapter->rx_ring[i].reg_idx = i;
3475 for (i = 0; i < adapter->num_tx_queues; i++)
3476 adapter->tx_ring[i].reg_idx = i;
3477 ret = true;
3478 }
3479
3480 return ret;
3481 }
3482
3483 #ifdef IXGBE_FCOE
3484 /**
3485 * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
3486 * @adapter: board private structure to initialize
3487 *
3488 * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
3489 *
3490 */
3491 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
3492 {
3493 int i, fcoe_rx_i = 0, fcoe_tx_i = 0;
3494 bool ret = false;
3495 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3496
3497 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3498 #ifdef CONFIG_IXGBE_DCB
3499 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3500 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
3501
3502 ixgbe_cache_ring_dcb(adapter);
3503 /* find out queues in TC for FCoE */
3504 fcoe_rx_i = adapter->rx_ring[fcoe->tc].reg_idx + 1;
3505 fcoe_tx_i = adapter->tx_ring[fcoe->tc].reg_idx + 1;
3506 /*
3507 * In 82599, the number of Tx queues for each traffic
3508 * class for both 8-TC and 4-TC modes are:
3509 * TCs : TC0 TC1 TC2 TC3 TC4 TC5 TC6 TC7
3510 * 8 TCs: 32 32 16 16 8 8 8 8
3511 * 4 TCs: 64 64 32 32
3512 * We have max 8 queues for FCoE, where 8 the is
3513 * FCoE redirection table size. If TC for FCoE is
3514 * less than or equal to TC3, we have enough queues
3515 * to add max of 8 queues for FCoE, so we start FCoE
3516 * tx descriptor from the next one, i.e., reg_idx + 1.
3517 * If TC for FCoE is above TC3, implying 8 TC mode,
3518 * and we need 8 for FCoE, we have to take all queues
3519 * in that traffic class for FCoE.
3520 */
3521 if ((f->indices == IXGBE_FCRETA_SIZE) && (fcoe->tc > 3))
3522 fcoe_tx_i--;
3523 }
3524 #endif /* CONFIG_IXGBE_DCB */
3525 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3526 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3527 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3528 ixgbe_cache_ring_fdir(adapter);
3529 else
3530 ixgbe_cache_ring_rss(adapter);
3531
3532 fcoe_rx_i = f->mask;
3533 fcoe_tx_i = f->mask;
3534 }
3535 for (i = 0; i < f->indices; i++, fcoe_rx_i++, fcoe_tx_i++) {
3536 adapter->rx_ring[f->mask + i].reg_idx = fcoe_rx_i;
3537 adapter->tx_ring[f->mask + i].reg_idx = fcoe_tx_i;
3538 }
3539 ret = true;
3540 }
3541 return ret;
3542 }
3543
3544 #endif /* IXGBE_FCOE */
3545 /**
3546 * ixgbe_cache_ring_register - Descriptor ring to register mapping
3547 * @adapter: board private structure to initialize
3548 *
3549 * Once we know the feature-set enabled for the device, we'll cache
3550 * the register offset the descriptor ring is assigned to.
3551 *
3552 * Note, the order the various feature calls is important. It must start with
3553 * the "most" features enabled at the same time, then trickle down to the
3554 * least amount of features turned on at once.
3555 **/
3556 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
3557 {
3558 /* start with default case */
3559 adapter->rx_ring[0].reg_idx = 0;
3560 adapter->tx_ring[0].reg_idx = 0;
3561
3562 #ifdef IXGBE_FCOE
3563 if (ixgbe_cache_ring_fcoe(adapter))
3564 return;
3565
3566 #endif /* IXGBE_FCOE */
3567 #ifdef CONFIG_IXGBE_DCB
3568 if (ixgbe_cache_ring_dcb(adapter))
3569 return;
3570
3571 #endif
3572 if (ixgbe_cache_ring_fdir(adapter))
3573 return;
3574
3575 if (ixgbe_cache_ring_rss(adapter))
3576 return;
3577 }
3578
3579 /**
3580 * ixgbe_alloc_queues - Allocate memory for all rings
3581 * @adapter: board private structure to initialize
3582 *
3583 * We allocate one ring per queue at run-time since we don't know the
3584 * number of queues at compile-time. The polling_netdev array is
3585 * intended for Multiqueue, but should work fine with a single queue.
3586 **/
3587 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
3588 {
3589 int i;
3590
3591 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
3592 sizeof(struct ixgbe_ring), GFP_KERNEL);
3593 if (!adapter->tx_ring)
3594 goto err_tx_ring_allocation;
3595
3596 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
3597 sizeof(struct ixgbe_ring), GFP_KERNEL);
3598 if (!adapter->rx_ring)
3599 goto err_rx_ring_allocation;
3600
3601 for (i = 0; i < adapter->num_tx_queues; i++) {
3602 adapter->tx_ring[i].count = adapter->tx_ring_count;
3603 adapter->tx_ring[i].queue_index = i;
3604 }
3605
3606 for (i = 0; i < adapter->num_rx_queues; i++) {
3607 adapter->rx_ring[i].count = adapter->rx_ring_count;
3608 adapter->rx_ring[i].queue_index = i;
3609 }
3610
3611 ixgbe_cache_ring_register(adapter);
3612
3613 return 0;
3614
3615 err_rx_ring_allocation:
3616 kfree(adapter->tx_ring);
3617 err_tx_ring_allocation:
3618 return -ENOMEM;
3619 }
3620
3621 /**
3622 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
3623 * @adapter: board private structure to initialize
3624 *
3625 * Attempt to configure the interrupts using the best available
3626 * capabilities of the hardware and the kernel.
3627 **/
3628 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
3629 {
3630 struct ixgbe_hw *hw = &adapter->hw;
3631 int err = 0;
3632 int vector, v_budget;
3633
3634 /*
3635 * It's easy to be greedy for MSI-X vectors, but it really
3636 * doesn't do us much good if we have a lot more vectors
3637 * than CPU's. So let's be conservative and only ask for
3638 * (roughly) the same number of vectors as there are CPU's.
3639 */
3640 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
3641 (int)num_online_cpus()) + NON_Q_VECTORS;
3642
3643 /*
3644 * At the same time, hardware can only support a maximum of
3645 * hw.mac->max_msix_vectors vectors. With features
3646 * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
3647 * descriptor queues supported by our device. Thus, we cap it off in
3648 * those rare cases where the cpu count also exceeds our vector limit.
3649 */
3650 v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
3651
3652 /* A failure in MSI-X entry allocation isn't fatal, but it does
3653 * mean we disable MSI-X capabilities of the adapter. */
3654 adapter->msix_entries = kcalloc(v_budget,
3655 sizeof(struct msix_entry), GFP_KERNEL);
3656 if (adapter->msix_entries) {
3657 for (vector = 0; vector < v_budget; vector++)
3658 adapter->msix_entries[vector].entry = vector;
3659
3660 ixgbe_acquire_msix_vectors(adapter, v_budget);
3661
3662 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3663 goto out;
3664 }
3665
3666 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
3667 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
3668 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3669 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3670 adapter->atr_sample_rate = 0;
3671 ixgbe_set_num_queues(adapter);
3672
3673 err = pci_enable_msi(adapter->pdev);
3674 if (!err) {
3675 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
3676 } else {
3677 DPRINTK(HW, DEBUG, "Unable to allocate MSI interrupt, "
3678 "falling back to legacy. Error: %d\n", err);
3679 /* reset err */
3680 err = 0;
3681 }
3682
3683 out:
3684 return err;
3685 }
3686
3687 /**
3688 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
3689 * @adapter: board private structure to initialize
3690 *
3691 * We allocate one q_vector per queue interrupt. If allocation fails we
3692 * return -ENOMEM.
3693 **/
3694 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
3695 {
3696 int q_idx, num_q_vectors;
3697 struct ixgbe_q_vector *q_vector;
3698 int napi_vectors;
3699 int (*poll)(struct napi_struct *, int);
3700
3701 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3702 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3703 napi_vectors = adapter->num_rx_queues;
3704 poll = &ixgbe_clean_rxtx_many;
3705 } else {
3706 num_q_vectors = 1;
3707 napi_vectors = 1;
3708 poll = &ixgbe_poll;
3709 }
3710
3711 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3712 q_vector = kzalloc(sizeof(struct ixgbe_q_vector), GFP_KERNEL);
3713 if (!q_vector)
3714 goto err_out;
3715 q_vector->adapter = adapter;
3716 if (q_vector->txr_count && !q_vector->rxr_count)
3717 q_vector->eitr = adapter->tx_eitr_param;
3718 else
3719 q_vector->eitr = adapter->rx_eitr_param;
3720 q_vector->v_idx = q_idx;
3721 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
3722 adapter->q_vector[q_idx] = q_vector;
3723 }
3724
3725 return 0;
3726
3727 err_out:
3728 while (q_idx) {
3729 q_idx--;
3730 q_vector = adapter->q_vector[q_idx];
3731 netif_napi_del(&q_vector->napi);
3732 kfree(q_vector);
3733 adapter->q_vector[q_idx] = NULL;
3734 }
3735 return -ENOMEM;
3736 }
3737
3738 /**
3739 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
3740 * @adapter: board private structure to initialize
3741 *
3742 * This function frees the memory allocated to the q_vectors. In addition if
3743 * NAPI is enabled it will delete any references to the NAPI struct prior
3744 * to freeing the q_vector.
3745 **/
3746 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
3747 {
3748 int q_idx, num_q_vectors;
3749
3750 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3751 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3752 else
3753 num_q_vectors = 1;
3754
3755 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3756 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
3757 adapter->q_vector[q_idx] = NULL;
3758 netif_napi_del(&q_vector->napi);
3759 kfree(q_vector);
3760 }
3761 }
3762
3763 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
3764 {
3765 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3766 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3767 pci_disable_msix(adapter->pdev);
3768 kfree(adapter->msix_entries);
3769 adapter->msix_entries = NULL;
3770 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
3771 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
3772 pci_disable_msi(adapter->pdev);
3773 }
3774 return;
3775 }
3776
3777 /**
3778 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
3779 * @adapter: board private structure to initialize
3780 *
3781 * We determine which interrupt scheme to use based on...
3782 * - Kernel support (MSI, MSI-X)
3783 * - which can be user-defined (via MODULE_PARAM)
3784 * - Hardware queue count (num_*_queues)
3785 * - defined by miscellaneous hardware support/features (RSS, etc.)
3786 **/
3787 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
3788 {
3789 int err;
3790
3791 /* Number of supported queues */
3792 ixgbe_set_num_queues(adapter);
3793
3794 err = ixgbe_set_interrupt_capability(adapter);
3795 if (err) {
3796 DPRINTK(PROBE, ERR, "Unable to setup interrupt capabilities\n");
3797 goto err_set_interrupt;
3798 }
3799
3800 err = ixgbe_alloc_q_vectors(adapter);
3801 if (err) {
3802 DPRINTK(PROBE, ERR, "Unable to allocate memory for queue "
3803 "vectors\n");
3804 goto err_alloc_q_vectors;
3805 }
3806
3807 err = ixgbe_alloc_queues(adapter);
3808 if (err) {
3809 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
3810 goto err_alloc_queues;
3811 }
3812
3813 DPRINTK(DRV, INFO, "Multiqueue %s: Rx Queue count = %u, "
3814 "Tx Queue count = %u\n",
3815 (adapter->num_rx_queues > 1) ? "Enabled" :
3816 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
3817
3818 set_bit(__IXGBE_DOWN, &adapter->state);
3819
3820 return 0;
3821
3822 err_alloc_queues:
3823 ixgbe_free_q_vectors(adapter);
3824 err_alloc_q_vectors:
3825 ixgbe_reset_interrupt_capability(adapter);
3826 err_set_interrupt:
3827 return err;
3828 }
3829
3830 /**
3831 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
3832 * @adapter: board private structure to clear interrupt scheme on
3833 *
3834 * We go through and clear interrupt specific resources and reset the structure
3835 * to pre-load conditions
3836 **/
3837 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
3838 {
3839 kfree(adapter->tx_ring);
3840 kfree(adapter->rx_ring);
3841 adapter->tx_ring = NULL;
3842 adapter->rx_ring = NULL;
3843
3844 ixgbe_free_q_vectors(adapter);
3845 ixgbe_reset_interrupt_capability(adapter);
3846 }
3847
3848 /**
3849 * ixgbe_sfp_timer - worker thread to find a missing module
3850 * @data: pointer to our adapter struct
3851 **/
3852 static void ixgbe_sfp_timer(unsigned long data)
3853 {
3854 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
3855
3856 /*
3857 * Do the sfp_timer outside of interrupt context due to the
3858 * delays that sfp+ detection requires
3859 */
3860 schedule_work(&adapter->sfp_task);
3861 }
3862
3863 /**
3864 * ixgbe_sfp_task - worker thread to find a missing module
3865 * @work: pointer to work_struct containing our data
3866 **/
3867 static void ixgbe_sfp_task(struct work_struct *work)
3868 {
3869 struct ixgbe_adapter *adapter = container_of(work,
3870 struct ixgbe_adapter,
3871 sfp_task);
3872 struct ixgbe_hw *hw = &adapter->hw;
3873
3874 if ((hw->phy.type == ixgbe_phy_nl) &&
3875 (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
3876 s32 ret = hw->phy.ops.identify_sfp(hw);
3877 if (ret == IXGBE_ERR_SFP_NOT_PRESENT)
3878 goto reschedule;
3879 ret = hw->phy.ops.reset(hw);
3880 if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
3881 dev_err(&adapter->pdev->dev, "failed to initialize "
3882 "because an unsupported SFP+ module type "
3883 "was detected.\n"
3884 "Reload the driver after installing a "
3885 "supported module.\n");
3886 unregister_netdev(adapter->netdev);
3887 } else {
3888 DPRINTK(PROBE, INFO, "detected SFP+: %d\n",
3889 hw->phy.sfp_type);
3890 }
3891 /* don't need this routine any more */
3892 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3893 }
3894 return;
3895 reschedule:
3896 if (test_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state))
3897 mod_timer(&adapter->sfp_timer,
3898 round_jiffies(jiffies + (2 * HZ)));
3899 }
3900
3901 /**
3902 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
3903 * @adapter: board private structure to initialize
3904 *
3905 * ixgbe_sw_init initializes the Adapter private data structure.
3906 * Fields are initialized based on PCI device information and
3907 * OS network device settings (MTU size).
3908 **/
3909 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
3910 {
3911 struct ixgbe_hw *hw = &adapter->hw;
3912 struct pci_dev *pdev = adapter->pdev;
3913 unsigned int rss;
3914 #ifdef CONFIG_IXGBE_DCB
3915 int j;
3916 struct tc_configuration *tc;
3917 #endif
3918
3919 /* PCI config space info */
3920
3921 hw->vendor_id = pdev->vendor;
3922 hw->device_id = pdev->device;
3923 hw->revision_id = pdev->revision;
3924 hw->subsystem_vendor_id = pdev->subsystem_vendor;
3925 hw->subsystem_device_id = pdev->subsystem_device;
3926
3927 /* Set capability flags */
3928 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
3929 adapter->ring_feature[RING_F_RSS].indices = rss;
3930 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
3931 adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
3932 if (hw->mac.type == ixgbe_mac_82598EB) {
3933 if (hw->device_id == IXGBE_DEV_ID_82598AT)
3934 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
3935 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
3936 } else if (hw->mac.type == ixgbe_mac_82599EB) {
3937 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
3938 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
3939 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
3940 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
3941 adapter->ring_feature[RING_F_FDIR].indices =
3942 IXGBE_MAX_FDIR_INDICES;
3943 adapter->atr_sample_rate = 20;
3944 adapter->fdir_pballoc = 0;
3945 #ifdef IXGBE_FCOE
3946 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
3947 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
3948 adapter->ring_feature[RING_F_FCOE].indices = 0;
3949 /* Default traffic class to use for FCoE */
3950 adapter->fcoe.tc = IXGBE_FCOE_DEFTC;
3951 #endif /* IXGBE_FCOE */
3952 }
3953
3954 #ifdef CONFIG_IXGBE_DCB
3955 /* Configure DCB traffic classes */
3956 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
3957 tc = &adapter->dcb_cfg.tc_config[j];
3958 tc->path[DCB_TX_CONFIG].bwg_id = 0;
3959 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
3960 tc->path[DCB_RX_CONFIG].bwg_id = 0;
3961 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
3962 tc->dcb_pfc = pfc_disabled;
3963 }
3964 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
3965 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
3966 adapter->dcb_cfg.rx_pba_cfg = pba_equal;
3967 adapter->dcb_cfg.pfc_mode_enable = false;
3968 adapter->dcb_cfg.round_robin_enable = false;
3969 adapter->dcb_set_bitmap = 0x00;
3970 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
3971 adapter->ring_feature[RING_F_DCB].indices);
3972
3973 #endif
3974
3975 /* default flow control settings */
3976 hw->fc.requested_mode = ixgbe_fc_full;
3977 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
3978 #ifdef CONFIG_DCB
3979 adapter->last_lfc_mode = hw->fc.current_mode;
3980 #endif
3981 hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
3982 hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
3983 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
3984 hw->fc.send_xon = true;
3985 hw->fc.disable_fc_autoneg = false;
3986
3987 /* enable itr by default in dynamic mode */
3988 adapter->rx_itr_setting = 1;
3989 adapter->rx_eitr_param = 20000;
3990 adapter->tx_itr_setting = 1;
3991 adapter->tx_eitr_param = 10000;
3992
3993 /* set defaults for eitr in MegaBytes */
3994 adapter->eitr_low = 10;
3995 adapter->eitr_high = 20;
3996
3997 /* set default ring sizes */
3998 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
3999 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
4000
4001 /* initialize eeprom parameters */
4002 if (ixgbe_init_eeprom_params_generic(hw)) {
4003 dev_err(&pdev->dev, "EEPROM initialization failed\n");
4004 return -EIO;
4005 }
4006
4007 /* enable rx csum by default */
4008 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
4009
4010 set_bit(__IXGBE_DOWN, &adapter->state);
4011
4012 return 0;
4013 }
4014
4015 /**
4016 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
4017 * @adapter: board private structure
4018 * @tx_ring: tx descriptor ring (for a specific queue) to setup
4019 *
4020 * Return 0 on success, negative on failure
4021 **/
4022 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
4023 struct ixgbe_ring *tx_ring)
4024 {
4025 struct pci_dev *pdev = adapter->pdev;
4026 int size;
4027
4028 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
4029 tx_ring->tx_buffer_info = vmalloc(size);
4030 if (!tx_ring->tx_buffer_info)
4031 goto err;
4032 memset(tx_ring->tx_buffer_info, 0, size);
4033
4034 /* round up to nearest 4K */
4035 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
4036 tx_ring->size = ALIGN(tx_ring->size, 4096);
4037
4038 tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
4039 &tx_ring->dma);
4040 if (!tx_ring->desc)
4041 goto err;
4042
4043 tx_ring->next_to_use = 0;
4044 tx_ring->next_to_clean = 0;
4045 tx_ring->work_limit = tx_ring->count;
4046 return 0;
4047
4048 err:
4049 vfree(tx_ring->tx_buffer_info);
4050 tx_ring->tx_buffer_info = NULL;
4051 DPRINTK(PROBE, ERR, "Unable to allocate memory for the transmit "
4052 "descriptor ring\n");
4053 return -ENOMEM;
4054 }
4055
4056 /**
4057 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
4058 * @adapter: board private structure
4059 *
4060 * If this function returns with an error, then it's possible one or
4061 * more of the rings is populated (while the rest are not). It is the
4062 * callers duty to clean those orphaned rings.
4063 *
4064 * Return 0 on success, negative on failure
4065 **/
4066 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
4067 {
4068 int i, err = 0;
4069
4070 for (i = 0; i < adapter->num_tx_queues; i++) {
4071 err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]);
4072 if (!err)
4073 continue;
4074 DPRINTK(PROBE, ERR, "Allocation for Tx Queue %u failed\n", i);
4075 break;
4076 }
4077
4078 return err;
4079 }
4080
4081 /**
4082 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
4083 * @adapter: board private structure
4084 * @rx_ring: rx descriptor ring (for a specific queue) to setup
4085 *
4086 * Returns 0 on success, negative on failure
4087 **/
4088 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
4089 struct ixgbe_ring *rx_ring)
4090 {
4091 struct pci_dev *pdev = adapter->pdev;
4092 int size;
4093
4094 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4095 rx_ring->rx_buffer_info = vmalloc(size);
4096 if (!rx_ring->rx_buffer_info) {
4097 DPRINTK(PROBE, ERR,
4098 "vmalloc allocation failed for the rx desc ring\n");
4099 goto alloc_failed;
4100 }
4101 memset(rx_ring->rx_buffer_info, 0, size);
4102
4103 /* Round up to nearest 4K */
4104 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
4105 rx_ring->size = ALIGN(rx_ring->size, 4096);
4106
4107 rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size, &rx_ring->dma);
4108
4109 if (!rx_ring->desc) {
4110 DPRINTK(PROBE, ERR,
4111 "Memory allocation failed for the rx desc ring\n");
4112 vfree(rx_ring->rx_buffer_info);
4113 goto alloc_failed;
4114 }
4115
4116 rx_ring->next_to_clean = 0;
4117 rx_ring->next_to_use = 0;
4118
4119 return 0;
4120
4121 alloc_failed:
4122 return -ENOMEM;
4123 }
4124
4125 /**
4126 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
4127 * @adapter: board private structure
4128 *
4129 * If this function returns with an error, then it's possible one or
4130 * more of the rings is populated (while the rest are not). It is the
4131 * callers duty to clean those orphaned rings.
4132 *
4133 * Return 0 on success, negative on failure
4134 **/
4135
4136 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
4137 {
4138 int i, err = 0;
4139
4140 for (i = 0; i < adapter->num_rx_queues; i++) {
4141 err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]);
4142 if (!err)
4143 continue;
4144 DPRINTK(PROBE, ERR, "Allocation for Rx Queue %u failed\n", i);
4145 break;
4146 }
4147
4148 return err;
4149 }
4150
4151 /**
4152 * ixgbe_free_tx_resources - Free Tx Resources per Queue
4153 * @adapter: board private structure
4154 * @tx_ring: Tx descriptor ring for a specific queue
4155 *
4156 * Free all transmit software resources
4157 **/
4158 void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
4159 struct ixgbe_ring *tx_ring)
4160 {
4161 struct pci_dev *pdev = adapter->pdev;
4162
4163 ixgbe_clean_tx_ring(adapter, tx_ring);
4164
4165 vfree(tx_ring->tx_buffer_info);
4166 tx_ring->tx_buffer_info = NULL;
4167
4168 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
4169
4170 tx_ring->desc = NULL;
4171 }
4172
4173 /**
4174 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
4175 * @adapter: board private structure
4176 *
4177 * Free all transmit software resources
4178 **/
4179 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
4180 {
4181 int i;
4182
4183 for (i = 0; i < adapter->num_tx_queues; i++)
4184 if (adapter->tx_ring[i].desc)
4185 ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
4186 }
4187
4188 /**
4189 * ixgbe_free_rx_resources - Free Rx Resources
4190 * @adapter: board private structure
4191 * @rx_ring: ring to clean the resources from
4192 *
4193 * Free all receive software resources
4194 **/
4195 void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
4196 struct ixgbe_ring *rx_ring)
4197 {
4198 struct pci_dev *pdev = adapter->pdev;
4199
4200 ixgbe_clean_rx_ring(adapter, rx_ring);
4201
4202 vfree(rx_ring->rx_buffer_info);
4203 rx_ring->rx_buffer_info = NULL;
4204
4205 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
4206
4207 rx_ring->desc = NULL;
4208 }
4209
4210 /**
4211 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
4212 * @adapter: board private structure
4213 *
4214 * Free all receive software resources
4215 **/
4216 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
4217 {
4218 int i;
4219
4220 for (i = 0; i < adapter->num_rx_queues; i++)
4221 if (adapter->rx_ring[i].desc)
4222 ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
4223 }
4224
4225 /**
4226 * ixgbe_change_mtu - Change the Maximum Transfer Unit
4227 * @netdev: network interface device structure
4228 * @new_mtu: new value for maximum frame size
4229 *
4230 * Returns 0 on success, negative on failure
4231 **/
4232 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
4233 {
4234 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4235 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4236
4237 /* MTU < 68 is an error and causes problems on some kernels */
4238 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
4239 return -EINVAL;
4240
4241 DPRINTK(PROBE, INFO, "changing MTU from %d to %d\n",
4242 netdev->mtu, new_mtu);
4243 /* must set new MTU before calling down or up */
4244 netdev->mtu = new_mtu;
4245
4246 if (netif_running(netdev))
4247 ixgbe_reinit_locked(adapter);
4248
4249 return 0;
4250 }
4251
4252 /**
4253 * ixgbe_open - Called when a network interface is made active
4254 * @netdev: network interface device structure
4255 *
4256 * Returns 0 on success, negative value on failure
4257 *
4258 * The open entry point is called when a network interface is made
4259 * active by the system (IFF_UP). At this point all resources needed
4260 * for transmit and receive operations are allocated, the interrupt
4261 * handler is registered with the OS, the watchdog timer is started,
4262 * and the stack is notified that the interface is ready.
4263 **/
4264 static int ixgbe_open(struct net_device *netdev)
4265 {
4266 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4267 int err;
4268
4269 /* disallow open during test */
4270 if (test_bit(__IXGBE_TESTING, &adapter->state))
4271 return -EBUSY;
4272
4273 netif_carrier_off(netdev);
4274
4275 /* allocate transmit descriptors */
4276 err = ixgbe_setup_all_tx_resources(adapter);
4277 if (err)
4278 goto err_setup_tx;
4279
4280 /* allocate receive descriptors */
4281 err = ixgbe_setup_all_rx_resources(adapter);
4282 if (err)
4283 goto err_setup_rx;
4284
4285 ixgbe_configure(adapter);
4286
4287 err = ixgbe_request_irq(adapter);
4288 if (err)
4289 goto err_req_irq;
4290
4291 err = ixgbe_up_complete(adapter);
4292 if (err)
4293 goto err_up;
4294
4295 netif_tx_start_all_queues(netdev);
4296
4297 return 0;
4298
4299 err_up:
4300 ixgbe_release_hw_control(adapter);
4301 ixgbe_free_irq(adapter);
4302 err_req_irq:
4303 err_setup_rx:
4304 ixgbe_free_all_rx_resources(adapter);
4305 err_setup_tx:
4306 ixgbe_free_all_tx_resources(adapter);
4307 ixgbe_reset(adapter);
4308
4309 return err;
4310 }
4311
4312 /**
4313 * ixgbe_close - Disables a network interface
4314 * @netdev: network interface device structure
4315 *
4316 * Returns 0, this is not allowed to fail
4317 *
4318 * The close entry point is called when an interface is de-activated
4319 * by the OS. The hardware is still under the drivers control, but
4320 * needs to be disabled. A global MAC reset is issued to stop the
4321 * hardware, and all transmit and receive resources are freed.
4322 **/
4323 static int ixgbe_close(struct net_device *netdev)
4324 {
4325 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4326
4327 ixgbe_down(adapter);
4328 ixgbe_free_irq(adapter);
4329
4330 ixgbe_free_all_tx_resources(adapter);
4331 ixgbe_free_all_rx_resources(adapter);
4332
4333 ixgbe_release_hw_control(adapter);
4334
4335 return 0;
4336 }
4337
4338 #ifdef CONFIG_PM
4339 static int ixgbe_resume(struct pci_dev *pdev)
4340 {
4341 struct net_device *netdev = pci_get_drvdata(pdev);
4342 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4343 u32 err;
4344
4345 pci_set_power_state(pdev, PCI_D0);
4346 pci_restore_state(pdev);
4347
4348 err = pci_enable_device_mem(pdev);
4349 if (err) {
4350 printk(KERN_ERR "ixgbe: Cannot enable PCI device from "
4351 "suspend\n");
4352 return err;
4353 }
4354 pci_set_master(pdev);
4355
4356 pci_wake_from_d3(pdev, false);
4357
4358 err = ixgbe_init_interrupt_scheme(adapter);
4359 if (err) {
4360 printk(KERN_ERR "ixgbe: Cannot initialize interrupts for "
4361 "device\n");
4362 return err;
4363 }
4364
4365 ixgbe_reset(adapter);
4366
4367 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
4368
4369 if (netif_running(netdev)) {
4370 err = ixgbe_open(adapter->netdev);
4371 if (err)
4372 return err;
4373 }
4374
4375 netif_device_attach(netdev);
4376
4377 return 0;
4378 }
4379 #endif /* CONFIG_PM */
4380
4381 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
4382 {
4383 struct net_device *netdev = pci_get_drvdata(pdev);
4384 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4385 struct ixgbe_hw *hw = &adapter->hw;
4386 u32 ctrl, fctrl;
4387 u32 wufc = adapter->wol;
4388 #ifdef CONFIG_PM
4389 int retval = 0;
4390 #endif
4391
4392 netif_device_detach(netdev);
4393
4394 if (netif_running(netdev)) {
4395 ixgbe_down(adapter);
4396 ixgbe_free_irq(adapter);
4397 ixgbe_free_all_tx_resources(adapter);
4398 ixgbe_free_all_rx_resources(adapter);
4399 }
4400 ixgbe_clear_interrupt_scheme(adapter);
4401
4402 #ifdef CONFIG_PM
4403 retval = pci_save_state(pdev);
4404 if (retval)
4405 return retval;
4406
4407 #endif
4408 if (wufc) {
4409 ixgbe_set_rx_mode(netdev);
4410
4411 /* turn on all-multi mode if wake on multicast is enabled */
4412 if (wufc & IXGBE_WUFC_MC) {
4413 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4414 fctrl |= IXGBE_FCTRL_MPE;
4415 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
4416 }
4417
4418 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
4419 ctrl |= IXGBE_CTRL_GIO_DIS;
4420 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
4421
4422 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
4423 } else {
4424 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
4425 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
4426 }
4427
4428 if (wufc && hw->mac.type == ixgbe_mac_82599EB)
4429 pci_wake_from_d3(pdev, true);
4430 else
4431 pci_wake_from_d3(pdev, false);
4432
4433 *enable_wake = !!wufc;
4434
4435 ixgbe_release_hw_control(adapter);
4436
4437 pci_disable_device(pdev);
4438
4439 return 0;
4440 }
4441
4442 #ifdef CONFIG_PM
4443 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
4444 {
4445 int retval;
4446 bool wake;
4447
4448 retval = __ixgbe_shutdown(pdev, &wake);
4449 if (retval)
4450 return retval;
4451
4452 if (wake) {
4453 pci_prepare_to_sleep(pdev);
4454 } else {
4455 pci_wake_from_d3(pdev, false);
4456 pci_set_power_state(pdev, PCI_D3hot);
4457 }
4458
4459 return 0;
4460 }
4461 #endif /* CONFIG_PM */
4462
4463 static void ixgbe_shutdown(struct pci_dev *pdev)
4464 {
4465 bool wake;
4466
4467 __ixgbe_shutdown(pdev, &wake);
4468
4469 if (system_state == SYSTEM_POWER_OFF) {
4470 pci_wake_from_d3(pdev, wake);
4471 pci_set_power_state(pdev, PCI_D3hot);
4472 }
4473 }
4474
4475 /**
4476 * ixgbe_update_stats - Update the board statistics counters.
4477 * @adapter: board private structure
4478 **/
4479 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
4480 {
4481 struct net_device *netdev = adapter->netdev;
4482 struct ixgbe_hw *hw = &adapter->hw;
4483 u64 total_mpc = 0;
4484 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
4485
4486 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
4487 u64 rsc_count = 0;
4488 u64 rsc_flush = 0;
4489 for (i = 0; i < 16; i++)
4490 adapter->hw_rx_no_dma_resources +=
4491 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4492 for (i = 0; i < adapter->num_rx_queues; i++) {
4493 rsc_count += adapter->rx_ring[i].rsc_count;
4494 rsc_flush += adapter->rx_ring[i].rsc_flush;
4495 }
4496 adapter->rsc_total_count = rsc_count;
4497 adapter->rsc_total_flush = rsc_flush;
4498 }
4499
4500 adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
4501 for (i = 0; i < 8; i++) {
4502 /* for packet buffers not used, the register should read 0 */
4503 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
4504 missed_rx += mpc;
4505 adapter->stats.mpc[i] += mpc;
4506 total_mpc += adapter->stats.mpc[i];
4507 if (hw->mac.type == ixgbe_mac_82598EB)
4508 adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
4509 adapter->stats.qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
4510 adapter->stats.qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
4511 adapter->stats.qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
4512 adapter->stats.qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
4513 if (hw->mac.type == ixgbe_mac_82599EB) {
4514 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4515 IXGBE_PXONRXCNT(i));
4516 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4517 IXGBE_PXOFFRXCNT(i));
4518 adapter->stats.qprdc[i] += IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4519 } else {
4520 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4521 IXGBE_PXONRXC(i));
4522 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4523 IXGBE_PXOFFRXC(i));
4524 }
4525 adapter->stats.pxontxc[i] += IXGBE_READ_REG(hw,
4526 IXGBE_PXONTXC(i));
4527 adapter->stats.pxofftxc[i] += IXGBE_READ_REG(hw,
4528 IXGBE_PXOFFTXC(i));
4529 }
4530 adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
4531 /* work around hardware counting issue */
4532 adapter->stats.gprc -= missed_rx;
4533
4534 /* 82598 hardware only has a 32 bit counter in the high register */
4535 if (hw->mac.type == ixgbe_mac_82599EB) {
4536 u64 tmp;
4537 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
4538 tmp = IXGBE_READ_REG(hw, IXGBE_GORCH) & 0xF; /* 4 high bits of GORC */
4539 adapter->stats.gorc += (tmp << 32);
4540 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
4541 tmp = IXGBE_READ_REG(hw, IXGBE_GOTCH) & 0xF; /* 4 high bits of GOTC */
4542 adapter->stats.gotc += (tmp << 32);
4543 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORL);
4544 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
4545 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
4546 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
4547 adapter->stats.fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
4548 adapter->stats.fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
4549 #ifdef IXGBE_FCOE
4550 adapter->stats.fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
4551 adapter->stats.fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
4552 adapter->stats.fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
4553 adapter->stats.fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
4554 adapter->stats.fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
4555 adapter->stats.fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
4556 #endif /* IXGBE_FCOE */
4557 } else {
4558 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
4559 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
4560 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
4561 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
4562 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
4563 }
4564 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
4565 adapter->stats.bprc += bprc;
4566 adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
4567 if (hw->mac.type == ixgbe_mac_82598EB)
4568 adapter->stats.mprc -= bprc;
4569 adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
4570 adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
4571 adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
4572 adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
4573 adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
4574 adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
4575 adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
4576 adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
4577 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
4578 adapter->stats.lxontxc += lxon;
4579 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
4580 adapter->stats.lxofftxc += lxoff;
4581 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4582 adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
4583 adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
4584 /*
4585 * 82598 errata - tx of flow control packets is included in tx counters
4586 */
4587 xon_off_tot = lxon + lxoff;
4588 adapter->stats.gptc -= xon_off_tot;
4589 adapter->stats.mptc -= xon_off_tot;
4590 adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
4591 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4592 adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
4593 adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
4594 adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
4595 adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
4596 adapter->stats.ptc64 -= xon_off_tot;
4597 adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
4598 adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
4599 adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
4600 adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
4601 adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
4602 adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
4603
4604 /* Fill out the OS statistics structure */
4605 netdev->stats.multicast = adapter->stats.mprc;
4606
4607 /* Rx Errors */
4608 netdev->stats.rx_errors = adapter->stats.crcerrs +
4609 adapter->stats.rlec;
4610 netdev->stats.rx_dropped = 0;
4611 netdev->stats.rx_length_errors = adapter->stats.rlec;
4612 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
4613 netdev->stats.rx_missed_errors = total_mpc;
4614 }
4615
4616 /**
4617 * ixgbe_watchdog - Timer Call-back
4618 * @data: pointer to adapter cast into an unsigned long
4619 **/
4620 static void ixgbe_watchdog(unsigned long data)
4621 {
4622 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4623 struct ixgbe_hw *hw = &adapter->hw;
4624 u64 eics = 0;
4625 int i;
4626
4627 /*
4628 * Do the watchdog outside of interrupt context due to the lovely
4629 * delays that some of the newer hardware requires
4630 */
4631
4632 if (test_bit(__IXGBE_DOWN, &adapter->state))
4633 goto watchdog_short_circuit;
4634
4635 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
4636 /*
4637 * for legacy and MSI interrupts don't set any bits
4638 * that are enabled for EIAM, because this operation
4639 * would set *both* EIMS and EICS for any bit in EIAM
4640 */
4641 IXGBE_WRITE_REG(hw, IXGBE_EICS,
4642 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
4643 goto watchdog_reschedule;
4644 }
4645
4646 /* get one bit for every active tx/rx interrupt vector */
4647 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
4648 struct ixgbe_q_vector *qv = adapter->q_vector[i];
4649 if (qv->rxr_count || qv->txr_count)
4650 eics |= ((u64)1 << i);
4651 }
4652
4653 /* Cause software interrupt to ensure rx rings are cleaned */
4654 ixgbe_irq_rearm_queues(adapter, eics);
4655
4656 watchdog_reschedule:
4657 /* Reset the timer */
4658 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
4659
4660 watchdog_short_circuit:
4661 schedule_work(&adapter->watchdog_task);
4662 }
4663
4664 /**
4665 * ixgbe_multispeed_fiber_task - worker thread to configure multispeed fiber
4666 * @work: pointer to work_struct containing our data
4667 **/
4668 static void ixgbe_multispeed_fiber_task(struct work_struct *work)
4669 {
4670 struct ixgbe_adapter *adapter = container_of(work,
4671 struct ixgbe_adapter,
4672 multispeed_fiber_task);
4673 struct ixgbe_hw *hw = &adapter->hw;
4674 u32 autoneg;
4675 bool negotiation;
4676
4677 adapter->flags |= IXGBE_FLAG_IN_SFP_LINK_TASK;
4678 autoneg = hw->phy.autoneg_advertised;
4679 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
4680 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
4681 if (hw->mac.ops.setup_link)
4682 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
4683 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
4684 adapter->flags &= ~IXGBE_FLAG_IN_SFP_LINK_TASK;
4685 }
4686
4687 /**
4688 * ixgbe_sfp_config_module_task - worker thread to configure a new SFP+ module
4689 * @work: pointer to work_struct containing our data
4690 **/
4691 static void ixgbe_sfp_config_module_task(struct work_struct *work)
4692 {
4693 struct ixgbe_adapter *adapter = container_of(work,
4694 struct ixgbe_adapter,
4695 sfp_config_module_task);
4696 struct ixgbe_hw *hw = &adapter->hw;
4697 u32 err;
4698
4699 adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
4700
4701 /* Time for electrical oscillations to settle down */
4702 msleep(100);
4703 err = hw->phy.ops.identify_sfp(hw);
4704
4705 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
4706 dev_err(&adapter->pdev->dev, "failed to initialize because "
4707 "an unsupported SFP+ module type was detected.\n"
4708 "Reload the driver after installing a supported "
4709 "module.\n");
4710 unregister_netdev(adapter->netdev);
4711 return;
4712 }
4713 hw->mac.ops.setup_sfp(hw);
4714
4715 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
4716 /* This will also work for DA Twinax connections */
4717 schedule_work(&adapter->multispeed_fiber_task);
4718 adapter->flags &= ~IXGBE_FLAG_IN_SFP_MOD_TASK;
4719 }
4720
4721 /**
4722 * ixgbe_fdir_reinit_task - worker thread to reinit FDIR filter table
4723 * @work: pointer to work_struct containing our data
4724 **/
4725 static void ixgbe_fdir_reinit_task(struct work_struct *work)
4726 {
4727 struct ixgbe_adapter *adapter = container_of(work,
4728 struct ixgbe_adapter,
4729 fdir_reinit_task);
4730 struct ixgbe_hw *hw = &adapter->hw;
4731 int i;
4732
4733 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
4734 for (i = 0; i < adapter->num_tx_queues; i++)
4735 set_bit(__IXGBE_FDIR_INIT_DONE,
4736 &(adapter->tx_ring[i].reinit_state));
4737 } else {
4738 DPRINTK(PROBE, ERR, "failed to finish FDIR re-initialization, "
4739 "ignored adding FDIR ATR filters \n");
4740 }
4741 /* Done FDIR Re-initialization, enable transmits */
4742 netif_tx_start_all_queues(adapter->netdev);
4743 }
4744
4745 /**
4746 * ixgbe_watchdog_task - worker thread to bring link up
4747 * @work: pointer to work_struct containing our data
4748 **/
4749 static void ixgbe_watchdog_task(struct work_struct *work)
4750 {
4751 struct ixgbe_adapter *adapter = container_of(work,
4752 struct ixgbe_adapter,
4753 watchdog_task);
4754 struct net_device *netdev = adapter->netdev;
4755 struct ixgbe_hw *hw = &adapter->hw;
4756 u32 link_speed = adapter->link_speed;
4757 bool link_up = adapter->link_up;
4758 int i;
4759 struct ixgbe_ring *tx_ring;
4760 int some_tx_pending = 0;
4761
4762 adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
4763
4764 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
4765 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
4766 if (link_up) {
4767 #ifdef CONFIG_DCB
4768 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4769 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
4770 hw->mac.ops.fc_enable(hw, i);
4771 } else {
4772 hw->mac.ops.fc_enable(hw, 0);
4773 }
4774 #else
4775 hw->mac.ops.fc_enable(hw, 0);
4776 #endif
4777 }
4778
4779 if (link_up ||
4780 time_after(jiffies, (adapter->link_check_timeout +
4781 IXGBE_TRY_LINK_TIMEOUT))) {
4782 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
4783 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
4784 }
4785 adapter->link_up = link_up;
4786 adapter->link_speed = link_speed;
4787 }
4788
4789 if (link_up) {
4790 if (!netif_carrier_ok(netdev)) {
4791 bool flow_rx, flow_tx;
4792
4793 if (hw->mac.type == ixgbe_mac_82599EB) {
4794 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
4795 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
4796 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
4797 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
4798 } else {
4799 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4800 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
4801 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
4802 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
4803 }
4804
4805 printk(KERN_INFO "ixgbe: %s NIC Link is Up %s, "
4806 "Flow Control: %s\n",
4807 netdev->name,
4808 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
4809 "10 Gbps" :
4810 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
4811 "1 Gbps" : "unknown speed")),
4812 ((flow_rx && flow_tx) ? "RX/TX" :
4813 (flow_rx ? "RX" :
4814 (flow_tx ? "TX" : "None"))));
4815
4816 netif_carrier_on(netdev);
4817 } else {
4818 /* Force detection of hung controller */
4819 adapter->detect_tx_hung = true;
4820 }
4821 } else {
4822 adapter->link_up = false;
4823 adapter->link_speed = 0;
4824 if (netif_carrier_ok(netdev)) {
4825 printk(KERN_INFO "ixgbe: %s NIC Link is Down\n",
4826 netdev->name);
4827 netif_carrier_off(netdev);
4828 }
4829 }
4830
4831 if (!netif_carrier_ok(netdev)) {
4832 for (i = 0; i < adapter->num_tx_queues; i++) {
4833 tx_ring = &adapter->tx_ring[i];
4834 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
4835 some_tx_pending = 1;
4836 break;
4837 }
4838 }
4839
4840 if (some_tx_pending) {
4841 /* We've lost link, so the controller stops DMA,
4842 * but we've got queued Tx work that's never going
4843 * to get done, so reset controller to flush Tx.
4844 * (Do the reset outside of interrupt context).
4845 */
4846 schedule_work(&adapter->reset_task);
4847 }
4848 }
4849
4850 ixgbe_update_stats(adapter);
4851 adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
4852 }
4853
4854 static int ixgbe_tso(struct ixgbe_adapter *adapter,
4855 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
4856 u32 tx_flags, u8 *hdr_len)
4857 {
4858 struct ixgbe_adv_tx_context_desc *context_desc;
4859 unsigned int i;
4860 int err;
4861 struct ixgbe_tx_buffer *tx_buffer_info;
4862 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
4863 u32 mss_l4len_idx, l4len;
4864
4865 if (skb_is_gso(skb)) {
4866 if (skb_header_cloned(skb)) {
4867 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
4868 if (err)
4869 return err;
4870 }
4871 l4len = tcp_hdrlen(skb);
4872 *hdr_len += l4len;
4873
4874 if (skb->protocol == htons(ETH_P_IP)) {
4875 struct iphdr *iph = ip_hdr(skb);
4876 iph->tot_len = 0;
4877 iph->check = 0;
4878 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
4879 iph->daddr, 0,
4880 IPPROTO_TCP,
4881 0);
4882 adapter->hw_tso_ctxt++;
4883 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
4884 ipv6_hdr(skb)->payload_len = 0;
4885 tcp_hdr(skb)->check =
4886 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
4887 &ipv6_hdr(skb)->daddr,
4888 0, IPPROTO_TCP, 0);
4889 adapter->hw_tso6_ctxt++;
4890 }
4891
4892 i = tx_ring->next_to_use;
4893
4894 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4895 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4896
4897 /* VLAN MACLEN IPLEN */
4898 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4899 vlan_macip_lens |=
4900 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4901 vlan_macip_lens |= ((skb_network_offset(skb)) <<
4902 IXGBE_ADVTXD_MACLEN_SHIFT);
4903 *hdr_len += skb_network_offset(skb);
4904 vlan_macip_lens |=
4905 (skb_transport_header(skb) - skb_network_header(skb));
4906 *hdr_len +=
4907 (skb_transport_header(skb) - skb_network_header(skb));
4908 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4909 context_desc->seqnum_seed = 0;
4910
4911 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
4912 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
4913 IXGBE_ADVTXD_DTYP_CTXT);
4914
4915 if (skb->protocol == htons(ETH_P_IP))
4916 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4917 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
4918 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4919
4920 /* MSS L4LEN IDX */
4921 mss_l4len_idx =
4922 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
4923 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
4924 /* use index 1 for TSO */
4925 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4926 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
4927
4928 tx_buffer_info->time_stamp = jiffies;
4929 tx_buffer_info->next_to_watch = i;
4930
4931 i++;
4932 if (i == tx_ring->count)
4933 i = 0;
4934 tx_ring->next_to_use = i;
4935
4936 return true;
4937 }
4938 return false;
4939 }
4940
4941 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
4942 struct ixgbe_ring *tx_ring,
4943 struct sk_buff *skb, u32 tx_flags)
4944 {
4945 struct ixgbe_adv_tx_context_desc *context_desc;
4946 unsigned int i;
4947 struct ixgbe_tx_buffer *tx_buffer_info;
4948 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
4949
4950 if (skb->ip_summed == CHECKSUM_PARTIAL ||
4951 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
4952 i = tx_ring->next_to_use;
4953 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4954 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4955
4956 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4957 vlan_macip_lens |=
4958 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4959 vlan_macip_lens |= (skb_network_offset(skb) <<
4960 IXGBE_ADVTXD_MACLEN_SHIFT);
4961 if (skb->ip_summed == CHECKSUM_PARTIAL)
4962 vlan_macip_lens |= (skb_transport_header(skb) -
4963 skb_network_header(skb));
4964
4965 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4966 context_desc->seqnum_seed = 0;
4967
4968 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
4969 IXGBE_ADVTXD_DTYP_CTXT);
4970
4971 if (skb->ip_summed == CHECKSUM_PARTIAL) {
4972 switch (skb->protocol) {
4973 case cpu_to_be16(ETH_P_IP):
4974 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4975 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
4976 type_tucmd_mlhl |=
4977 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4978 else if (ip_hdr(skb)->protocol == IPPROTO_SCTP)
4979 type_tucmd_mlhl |=
4980 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4981 break;
4982 case cpu_to_be16(ETH_P_IPV6):
4983 /* XXX what about other V6 headers?? */
4984 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
4985 type_tucmd_mlhl |=
4986 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4987 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_SCTP)
4988 type_tucmd_mlhl |=
4989 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4990 break;
4991 default:
4992 if (unlikely(net_ratelimit())) {
4993 DPRINTK(PROBE, WARNING,
4994 "partial checksum but proto=%x!\n",
4995 skb->protocol);
4996 }
4997 break;
4998 }
4999 }
5000
5001 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
5002 /* use index zero for tx checksum offload */
5003 context_desc->mss_l4len_idx = 0;
5004
5005 tx_buffer_info->time_stamp = jiffies;
5006 tx_buffer_info->next_to_watch = i;
5007
5008 adapter->hw_csum_tx_good++;
5009 i++;
5010 if (i == tx_ring->count)
5011 i = 0;
5012 tx_ring->next_to_use = i;
5013
5014 return true;
5015 }
5016
5017 return false;
5018 }
5019
5020 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
5021 struct ixgbe_ring *tx_ring,
5022 struct sk_buff *skb, u32 tx_flags,
5023 unsigned int first)
5024 {
5025 struct ixgbe_tx_buffer *tx_buffer_info;
5026 unsigned int len;
5027 unsigned int total = skb->len;
5028 unsigned int offset = 0, size, count = 0, i;
5029 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
5030 unsigned int f;
5031 dma_addr_t *map;
5032
5033 i = tx_ring->next_to_use;
5034
5035 if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
5036 dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
5037 return 0;
5038 }
5039
5040 map = skb_shinfo(skb)->dma_maps;
5041
5042 if (tx_flags & IXGBE_TX_FLAGS_FCOE)
5043 /* excluding fcoe_crc_eof for FCoE */
5044 total -= sizeof(struct fcoe_crc_eof);
5045
5046 len = min(skb_headlen(skb), total);
5047 while (len) {
5048 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5049 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
5050
5051 tx_buffer_info->length = size;
5052 tx_buffer_info->dma = skb_shinfo(skb)->dma_head + offset;
5053 tx_buffer_info->time_stamp = jiffies;
5054 tx_buffer_info->next_to_watch = i;
5055
5056 len -= size;
5057 total -= size;
5058 offset += size;
5059 count++;
5060
5061 if (len) {
5062 i++;
5063 if (i == tx_ring->count)
5064 i = 0;
5065 }
5066 }
5067
5068 for (f = 0; f < nr_frags; f++) {
5069 struct skb_frag_struct *frag;
5070
5071 frag = &skb_shinfo(skb)->frags[f];
5072 len = min((unsigned int)frag->size, total);
5073 offset = 0;
5074
5075 while (len) {
5076 i++;
5077 if (i == tx_ring->count)
5078 i = 0;
5079
5080 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5081 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
5082
5083 tx_buffer_info->length = size;
5084 tx_buffer_info->dma = map[f] + offset;
5085 tx_buffer_info->time_stamp = jiffies;
5086 tx_buffer_info->next_to_watch = i;
5087
5088 len -= size;
5089 total -= size;
5090 offset += size;
5091 count++;
5092 }
5093 if (total == 0)
5094 break;
5095 }
5096
5097 tx_ring->tx_buffer_info[i].skb = skb;
5098 tx_ring->tx_buffer_info[first].next_to_watch = i;
5099
5100 return count;
5101 }
5102
5103 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
5104 struct ixgbe_ring *tx_ring,
5105 int tx_flags, int count, u32 paylen, u8 hdr_len)
5106 {
5107 union ixgbe_adv_tx_desc *tx_desc = NULL;
5108 struct ixgbe_tx_buffer *tx_buffer_info;
5109 u32 olinfo_status = 0, cmd_type_len = 0;
5110 unsigned int i;
5111 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
5112
5113 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
5114
5115 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
5116
5117 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5118 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
5119
5120 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
5121 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
5122
5123 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
5124 IXGBE_ADVTXD_POPTS_SHIFT;
5125
5126 /* use index 1 context for tso */
5127 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
5128 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
5129 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
5130 IXGBE_ADVTXD_POPTS_SHIFT;
5131
5132 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
5133 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
5134 IXGBE_ADVTXD_POPTS_SHIFT;
5135
5136 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
5137 olinfo_status |= IXGBE_ADVTXD_CC;
5138 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
5139 if (tx_flags & IXGBE_TX_FLAGS_FSO)
5140 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
5141 }
5142
5143 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
5144
5145 i = tx_ring->next_to_use;
5146 while (count--) {
5147 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5148 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
5149 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
5150 tx_desc->read.cmd_type_len =
5151 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
5152 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
5153 i++;
5154 if (i == tx_ring->count)
5155 i = 0;
5156 }
5157
5158 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
5159
5160 /*
5161 * Force memory writes to complete before letting h/w
5162 * know there are new descriptors to fetch. (Only
5163 * applicable for weak-ordered memory model archs,
5164 * such as IA-64).
5165 */
5166 wmb();
5167
5168 tx_ring->next_to_use = i;
5169 writel(i, adapter->hw.hw_addr + tx_ring->tail);
5170 }
5171
5172 static void ixgbe_atr(struct ixgbe_adapter *adapter, struct sk_buff *skb,
5173 int queue, u32 tx_flags)
5174 {
5175 /* Right now, we support IPv4 only */
5176 struct ixgbe_atr_input atr_input;
5177 struct tcphdr *th;
5178 struct iphdr *iph = ip_hdr(skb);
5179 struct ethhdr *eth = (struct ethhdr *)skb->data;
5180 u16 vlan_id, src_port, dst_port, flex_bytes;
5181 u32 src_ipv4_addr, dst_ipv4_addr;
5182 u8 l4type = 0;
5183
5184 /* check if we're UDP or TCP */
5185 if (iph->protocol == IPPROTO_TCP) {
5186 th = tcp_hdr(skb);
5187 src_port = th->source;
5188 dst_port = th->dest;
5189 l4type |= IXGBE_ATR_L4TYPE_TCP;
5190 /* l4type IPv4 type is 0, no need to assign */
5191 } else {
5192 /* Unsupported L4 header, just bail here */
5193 return;
5194 }
5195
5196 memset(&atr_input, 0, sizeof(struct ixgbe_atr_input));
5197
5198 vlan_id = (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK) >>
5199 IXGBE_TX_FLAGS_VLAN_SHIFT;
5200 src_ipv4_addr = iph->saddr;
5201 dst_ipv4_addr = iph->daddr;
5202 flex_bytes = eth->h_proto;
5203
5204 ixgbe_atr_set_vlan_id_82599(&atr_input, vlan_id);
5205 ixgbe_atr_set_src_port_82599(&atr_input, dst_port);
5206 ixgbe_atr_set_dst_port_82599(&atr_input, src_port);
5207 ixgbe_atr_set_flex_byte_82599(&atr_input, flex_bytes);
5208 ixgbe_atr_set_l4type_82599(&atr_input, l4type);
5209 /* src and dst are inverted, think how the receiver sees them */
5210 ixgbe_atr_set_src_ipv4_82599(&atr_input, dst_ipv4_addr);
5211 ixgbe_atr_set_dst_ipv4_82599(&atr_input, src_ipv4_addr);
5212
5213 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
5214 ixgbe_fdir_add_signature_filter_82599(&adapter->hw, &atr_input, queue);
5215 }
5216
5217 static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
5218 struct ixgbe_ring *tx_ring, int size)
5219 {
5220 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5221
5222 netif_stop_subqueue(netdev, tx_ring->queue_index);
5223 /* Herbert's original patch had:
5224 * smp_mb__after_netif_stop_queue();
5225 * but since that doesn't exist yet, just open code it. */
5226 smp_mb();
5227
5228 /* We need to check again in a case another CPU has just
5229 * made room available. */
5230 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
5231 return -EBUSY;
5232
5233 /* A reprieve! - use start_queue because it doesn't call schedule */
5234 netif_start_subqueue(netdev, tx_ring->queue_index);
5235 ++adapter->restart_queue;
5236 return 0;
5237 }
5238
5239 static int ixgbe_maybe_stop_tx(struct net_device *netdev,
5240 struct ixgbe_ring *tx_ring, int size)
5241 {
5242 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
5243 return 0;
5244 return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
5245 }
5246
5247 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
5248 {
5249 struct ixgbe_adapter *adapter = netdev_priv(dev);
5250
5251 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
5252 return smp_processor_id();
5253
5254 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
5255 return (skb->vlan_tci & IXGBE_TX_FLAGS_VLAN_PRIO_MASK) >> 13;
5256
5257 return skb_tx_hash(dev, skb);
5258 }
5259
5260 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
5261 struct net_device *netdev)
5262 {
5263 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5264 struct ixgbe_ring *tx_ring;
5265 unsigned int first;
5266 unsigned int tx_flags = 0;
5267 u8 hdr_len = 0;
5268 int r_idx = 0, tso;
5269 int count = 0;
5270 unsigned int f;
5271
5272 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
5273 tx_flags |= vlan_tx_tag_get(skb);
5274 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5275 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
5276 tx_flags |= (skb->queue_mapping << 13);
5277 }
5278 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
5279 tx_flags |= IXGBE_TX_FLAGS_VLAN;
5280 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5281 if (skb->priority != TC_PRIO_CONTROL) {
5282 tx_flags |= (skb->queue_mapping << 13);
5283 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
5284 tx_flags |= IXGBE_TX_FLAGS_VLAN;
5285 } else {
5286 skb->queue_mapping =
5287 adapter->ring_feature[RING_F_DCB].indices-1;
5288 }
5289 }
5290
5291 r_idx = skb->queue_mapping;
5292 tx_ring = &adapter->tx_ring[r_idx];
5293
5294 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
5295 (skb->protocol == htons(ETH_P_FCOE))) {
5296 tx_flags |= IXGBE_TX_FLAGS_FCOE;
5297 #ifdef IXGBE_FCOE
5298 r_idx = smp_processor_id();
5299 r_idx &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
5300 r_idx += adapter->ring_feature[RING_F_FCOE].mask;
5301 tx_ring = &adapter->tx_ring[r_idx];
5302 #endif
5303 }
5304 /* four things can cause us to need a context descriptor */
5305 if (skb_is_gso(skb) ||
5306 (skb->ip_summed == CHECKSUM_PARTIAL) ||
5307 (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
5308 (tx_flags & IXGBE_TX_FLAGS_FCOE))
5309 count++;
5310
5311 count += TXD_USE_COUNT(skb_headlen(skb));
5312 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
5313 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
5314
5315 if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
5316 adapter->tx_busy++;
5317 return NETDEV_TX_BUSY;
5318 }
5319
5320 first = tx_ring->next_to_use;
5321 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
5322 #ifdef IXGBE_FCOE
5323 /* setup tx offload for FCoE */
5324 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
5325 if (tso < 0) {
5326 dev_kfree_skb_any(skb);
5327 return NETDEV_TX_OK;
5328 }
5329 if (tso)
5330 tx_flags |= IXGBE_TX_FLAGS_FSO;
5331 #endif /* IXGBE_FCOE */
5332 } else {
5333 if (skb->protocol == htons(ETH_P_IP))
5334 tx_flags |= IXGBE_TX_FLAGS_IPV4;
5335 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
5336 if (tso < 0) {
5337 dev_kfree_skb_any(skb);
5338 return NETDEV_TX_OK;
5339 }
5340
5341 if (tso)
5342 tx_flags |= IXGBE_TX_FLAGS_TSO;
5343 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
5344 (skb->ip_summed == CHECKSUM_PARTIAL))
5345 tx_flags |= IXGBE_TX_FLAGS_CSUM;
5346 }
5347
5348 count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first);
5349 if (count) {
5350 /* add the ATR filter if ATR is on */
5351 if (tx_ring->atr_sample_rate) {
5352 ++tx_ring->atr_count;
5353 if ((tx_ring->atr_count >= tx_ring->atr_sample_rate) &&
5354 test_bit(__IXGBE_FDIR_INIT_DONE,
5355 &tx_ring->reinit_state)) {
5356 ixgbe_atr(adapter, skb, tx_ring->queue_index,
5357 tx_flags);
5358 tx_ring->atr_count = 0;
5359 }
5360 }
5361 ixgbe_tx_queue(adapter, tx_ring, tx_flags, count, skb->len,
5362 hdr_len);
5363 ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
5364
5365 } else {
5366 dev_kfree_skb_any(skb);
5367 tx_ring->tx_buffer_info[first].time_stamp = 0;
5368 tx_ring->next_to_use = first;
5369 }
5370
5371 return NETDEV_TX_OK;
5372 }
5373
5374 /**
5375 * ixgbe_get_stats - Get System Network Statistics
5376 * @netdev: network interface device structure
5377 *
5378 * Returns the address of the device statistics structure.
5379 * The statistics are actually updated from the timer callback.
5380 **/
5381 static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
5382 {
5383 /* only return the current stats */
5384 return &netdev->stats;
5385 }
5386
5387 /**
5388 * ixgbe_set_mac - Change the Ethernet Address of the NIC
5389 * @netdev: network interface device structure
5390 * @p: pointer to an address structure
5391 *
5392 * Returns 0 on success, negative on failure
5393 **/
5394 static int ixgbe_set_mac(struct net_device *netdev, void *p)
5395 {
5396 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5397 struct ixgbe_hw *hw = &adapter->hw;
5398 struct sockaddr *addr = p;
5399
5400 if (!is_valid_ether_addr(addr->sa_data))
5401 return -EADDRNOTAVAIL;
5402
5403 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
5404 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
5405
5406 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
5407
5408 return 0;
5409 }
5410
5411 static int
5412 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
5413 {
5414 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5415 struct ixgbe_hw *hw = &adapter->hw;
5416 u16 value;
5417 int rc;
5418
5419 if (prtad != hw->phy.mdio.prtad)
5420 return -EINVAL;
5421 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
5422 if (!rc)
5423 rc = value;
5424 return rc;
5425 }
5426
5427 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
5428 u16 addr, u16 value)
5429 {
5430 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5431 struct ixgbe_hw *hw = &adapter->hw;
5432
5433 if (prtad != hw->phy.mdio.prtad)
5434 return -EINVAL;
5435 return hw->phy.ops.write_reg(hw, addr, devad, value);
5436 }
5437
5438 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
5439 {
5440 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5441
5442 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
5443 }
5444
5445 /**
5446 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
5447 * netdev->dev_addrs
5448 * @netdev: network interface device structure
5449 *
5450 * Returns non-zero on failure
5451 **/
5452 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
5453 {
5454 int err = 0;
5455 struct ixgbe_adapter *adapter = netdev_priv(dev);
5456 struct ixgbe_mac_info *mac = &adapter->hw.mac;
5457
5458 if (is_valid_ether_addr(mac->san_addr)) {
5459 rtnl_lock();
5460 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
5461 rtnl_unlock();
5462 }
5463 return err;
5464 }
5465
5466 /**
5467 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
5468 * netdev->dev_addrs
5469 * @netdev: network interface device structure
5470 *
5471 * Returns non-zero on failure
5472 **/
5473 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
5474 {
5475 int err = 0;
5476 struct ixgbe_adapter *adapter = netdev_priv(dev);
5477 struct ixgbe_mac_info *mac = &adapter->hw.mac;
5478
5479 if (is_valid_ether_addr(mac->san_addr)) {
5480 rtnl_lock();
5481 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
5482 rtnl_unlock();
5483 }
5484 return err;
5485 }
5486
5487 #ifdef CONFIG_NET_POLL_CONTROLLER
5488 /*
5489 * Polling 'interrupt' - used by things like netconsole to send skbs
5490 * without having to re-enable interrupts. It's not called while
5491 * the interrupt routine is executing.
5492 */
5493 static void ixgbe_netpoll(struct net_device *netdev)
5494 {
5495 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5496 int i;
5497
5498 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
5499 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
5500 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
5501 for (i = 0; i < num_q_vectors; i++) {
5502 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
5503 ixgbe_msix_clean_many(0, q_vector);
5504 }
5505 } else {
5506 ixgbe_intr(adapter->pdev->irq, netdev);
5507 }
5508 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
5509 }
5510 #endif
5511
5512 static const struct net_device_ops ixgbe_netdev_ops = {
5513 .ndo_open = ixgbe_open,
5514 .ndo_stop = ixgbe_close,
5515 .ndo_start_xmit = ixgbe_xmit_frame,
5516 .ndo_select_queue = ixgbe_select_queue,
5517 .ndo_get_stats = ixgbe_get_stats,
5518 .ndo_set_rx_mode = ixgbe_set_rx_mode,
5519 .ndo_set_multicast_list = ixgbe_set_rx_mode,
5520 .ndo_validate_addr = eth_validate_addr,
5521 .ndo_set_mac_address = ixgbe_set_mac,
5522 .ndo_change_mtu = ixgbe_change_mtu,
5523 .ndo_tx_timeout = ixgbe_tx_timeout,
5524 .ndo_vlan_rx_register = ixgbe_vlan_rx_register,
5525 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
5526 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
5527 .ndo_do_ioctl = ixgbe_ioctl,
5528 #ifdef CONFIG_NET_POLL_CONTROLLER
5529 .ndo_poll_controller = ixgbe_netpoll,
5530 #endif
5531 #ifdef IXGBE_FCOE
5532 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
5533 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
5534 .ndo_fcoe_enable = ixgbe_fcoe_enable,
5535 .ndo_fcoe_disable = ixgbe_fcoe_disable,
5536 .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
5537 #endif /* IXGBE_FCOE */
5538 };
5539
5540 /**
5541 * ixgbe_probe - Device Initialization Routine
5542 * @pdev: PCI device information struct
5543 * @ent: entry in ixgbe_pci_tbl
5544 *
5545 * Returns 0 on success, negative on failure
5546 *
5547 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
5548 * The OS initialization, configuring of the adapter private structure,
5549 * and a hardware reset occur.
5550 **/
5551 static int __devinit ixgbe_probe(struct pci_dev *pdev,
5552 const struct pci_device_id *ent)
5553 {
5554 struct net_device *netdev;
5555 struct ixgbe_adapter *adapter = NULL;
5556 struct ixgbe_hw *hw;
5557 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
5558 static int cards_found;
5559 int i, err, pci_using_dac;
5560 #ifdef IXGBE_FCOE
5561 u16 device_caps;
5562 #endif
5563 u32 part_num, eec;
5564
5565 err = pci_enable_device_mem(pdev);
5566 if (err)
5567 return err;
5568
5569 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) &&
5570 !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
5571 pci_using_dac = 1;
5572 } else {
5573 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5574 if (err) {
5575 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5576 if (err) {
5577 dev_err(&pdev->dev, "No usable DMA "
5578 "configuration, aborting\n");
5579 goto err_dma;
5580 }
5581 }
5582 pci_using_dac = 0;
5583 }
5584
5585 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
5586 IORESOURCE_MEM), ixgbe_driver_name);
5587 if (err) {
5588 dev_err(&pdev->dev,
5589 "pci_request_selected_regions failed 0x%x\n", err);
5590 goto err_pci_reg;
5591 }
5592
5593 pci_enable_pcie_error_reporting(pdev);
5594
5595 pci_set_master(pdev);
5596 pci_save_state(pdev);
5597
5598 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES);
5599 if (!netdev) {
5600 err = -ENOMEM;
5601 goto err_alloc_etherdev;
5602 }
5603
5604 SET_NETDEV_DEV(netdev, &pdev->dev);
5605
5606 pci_set_drvdata(pdev, netdev);
5607 adapter = netdev_priv(netdev);
5608
5609 adapter->netdev = netdev;
5610 adapter->pdev = pdev;
5611 hw = &adapter->hw;
5612 hw->back = adapter;
5613 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
5614
5615 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
5616 pci_resource_len(pdev, 0));
5617 if (!hw->hw_addr) {
5618 err = -EIO;
5619 goto err_ioremap;
5620 }
5621
5622 for (i = 1; i <= 5; i++) {
5623 if (pci_resource_len(pdev, i) == 0)
5624 continue;
5625 }
5626
5627 netdev->netdev_ops = &ixgbe_netdev_ops;
5628 ixgbe_set_ethtool_ops(netdev);
5629 netdev->watchdog_timeo = 5 * HZ;
5630 strcpy(netdev->name, pci_name(pdev));
5631
5632 adapter->bd_number = cards_found;
5633
5634 /* Setup hw api */
5635 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
5636 hw->mac.type = ii->mac;
5637
5638 /* EEPROM */
5639 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
5640 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
5641 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
5642 if (!(eec & (1 << 8)))
5643 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
5644
5645 /* PHY */
5646 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
5647 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
5648 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
5649 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
5650 hw->phy.mdio.mmds = 0;
5651 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
5652 hw->phy.mdio.dev = netdev;
5653 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
5654 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
5655
5656 /* set up this timer and work struct before calling get_invariants
5657 * which might start the timer
5658 */
5659 init_timer(&adapter->sfp_timer);
5660 adapter->sfp_timer.function = &ixgbe_sfp_timer;
5661 adapter->sfp_timer.data = (unsigned long) adapter;
5662
5663 INIT_WORK(&adapter->sfp_task, ixgbe_sfp_task);
5664
5665 /* multispeed fiber has its own tasklet, called from GPI SDP1 context */
5666 INIT_WORK(&adapter->multispeed_fiber_task, ixgbe_multispeed_fiber_task);
5667
5668 /* a new SFP+ module arrival, called from GPI SDP2 context */
5669 INIT_WORK(&adapter->sfp_config_module_task,
5670 ixgbe_sfp_config_module_task);
5671
5672 ii->get_invariants(hw);
5673
5674 /* setup the private structure */
5675 err = ixgbe_sw_init(adapter);
5676 if (err)
5677 goto err_sw_init;
5678
5679 /*
5680 * If there is a fan on this device and it has failed log the
5681 * failure.
5682 */
5683 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
5684 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
5685 if (esdp & IXGBE_ESDP_SDP1)
5686 DPRINTK(PROBE, CRIT,
5687 "Fan has stopped, replace the adapter\n");
5688 }
5689
5690 /* reset_hw fills in the perm_addr as well */
5691 err = hw->mac.ops.reset_hw(hw);
5692 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
5693 hw->mac.type == ixgbe_mac_82598EB) {
5694 /*
5695 * Start a kernel thread to watch for a module to arrive.
5696 * Only do this for 82598, since 82599 will generate
5697 * interrupts on module arrival.
5698 */
5699 set_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5700 mod_timer(&adapter->sfp_timer,
5701 round_jiffies(jiffies + (2 * HZ)));
5702 err = 0;
5703 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5704 dev_err(&adapter->pdev->dev, "failed to initialize because "
5705 "an unsupported SFP+ module type was detected.\n"
5706 "Reload the driver after installing a supported "
5707 "module.\n");
5708 goto err_sw_init;
5709 } else if (err) {
5710 dev_err(&adapter->pdev->dev, "HW Init failed: %d\n", err);
5711 goto err_sw_init;
5712 }
5713
5714 netdev->features = NETIF_F_SG |
5715 NETIF_F_IP_CSUM |
5716 NETIF_F_HW_VLAN_TX |
5717 NETIF_F_HW_VLAN_RX |
5718 NETIF_F_HW_VLAN_FILTER;
5719
5720 netdev->features |= NETIF_F_IPV6_CSUM;
5721 netdev->features |= NETIF_F_TSO;
5722 netdev->features |= NETIF_F_TSO6;
5723 netdev->features |= NETIF_F_GRO;
5724
5725 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
5726 netdev->features |= NETIF_F_SCTP_CSUM;
5727
5728 netdev->vlan_features |= NETIF_F_TSO;
5729 netdev->vlan_features |= NETIF_F_TSO6;
5730 netdev->vlan_features |= NETIF_F_IP_CSUM;
5731 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
5732 netdev->vlan_features |= NETIF_F_SG;
5733
5734 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
5735 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
5736
5737 #ifdef CONFIG_IXGBE_DCB
5738 netdev->dcbnl_ops = &dcbnl_ops;
5739 #endif
5740
5741 #ifdef IXGBE_FCOE
5742 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
5743 if (hw->mac.ops.get_device_caps) {
5744 hw->mac.ops.get_device_caps(hw, &device_caps);
5745 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
5746 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
5747 }
5748 }
5749 #endif /* IXGBE_FCOE */
5750 if (pci_using_dac)
5751 netdev->features |= NETIF_F_HIGHDMA;
5752
5753 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
5754 netdev->features |= NETIF_F_LRO;
5755
5756 /* make sure the EEPROM is good */
5757 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
5758 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
5759 err = -EIO;
5760 goto err_eeprom;
5761 }
5762
5763 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
5764 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
5765
5766 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
5767 dev_err(&pdev->dev, "invalid MAC address\n");
5768 err = -EIO;
5769 goto err_eeprom;
5770 }
5771
5772 init_timer(&adapter->watchdog_timer);
5773 adapter->watchdog_timer.function = &ixgbe_watchdog;
5774 adapter->watchdog_timer.data = (unsigned long)adapter;
5775
5776 INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
5777 INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
5778
5779 err = ixgbe_init_interrupt_scheme(adapter);
5780 if (err)
5781 goto err_sw_init;
5782
5783 switch (pdev->device) {
5784 case IXGBE_DEV_ID_82599_KX4:
5785 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
5786 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
5787 /* Enable ACPI wakeup in GRC */
5788 IXGBE_WRITE_REG(hw, IXGBE_GRC,
5789 (IXGBE_READ_REG(hw, IXGBE_GRC) & ~IXGBE_GRC_APME));
5790 break;
5791 default:
5792 adapter->wol = 0;
5793 break;
5794 }
5795 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
5796
5797 /* pick up the PCI bus settings for reporting later */
5798 hw->mac.ops.get_bus_info(hw);
5799
5800 /* print bus type/speed/width info */
5801 dev_info(&pdev->dev, "(PCI Express:%s:%s) %pM\n",
5802 ((hw->bus.speed == ixgbe_bus_speed_5000) ? "5.0Gb/s":
5803 (hw->bus.speed == ixgbe_bus_speed_2500) ? "2.5Gb/s":"Unknown"),
5804 ((hw->bus.width == ixgbe_bus_width_pcie_x8) ? "Width x8" :
5805 (hw->bus.width == ixgbe_bus_width_pcie_x4) ? "Width x4" :
5806 (hw->bus.width == ixgbe_bus_width_pcie_x1) ? "Width x1" :
5807 "Unknown"),
5808 netdev->dev_addr);
5809 ixgbe_read_pba_num_generic(hw, &part_num);
5810 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
5811 dev_info(&pdev->dev, "MAC: %d, PHY: %d, SFP+: %d, PBA No: %06x-%03x\n",
5812 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
5813 (part_num >> 8), (part_num & 0xff));
5814 else
5815 dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
5816 hw->mac.type, hw->phy.type,
5817 (part_num >> 8), (part_num & 0xff));
5818
5819 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
5820 dev_warn(&pdev->dev, "PCI-Express bandwidth available for "
5821 "this card is not sufficient for optimal "
5822 "performance.\n");
5823 dev_warn(&pdev->dev, "For optimal performance a x8 "
5824 "PCI-Express slot is required.\n");
5825 }
5826
5827 /* save off EEPROM version number */
5828 hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
5829
5830 /* reset the hardware with the new settings */
5831 err = hw->mac.ops.start_hw(hw);
5832
5833 if (err == IXGBE_ERR_EEPROM_VERSION) {
5834 /* We are running on a pre-production device, log a warning */
5835 dev_warn(&pdev->dev, "This device is a pre-production "
5836 "adapter/LOM. Please be aware there may be issues "
5837 "associated with your hardware. If you are "
5838 "experiencing problems please contact your Intel or "
5839 "hardware representative who provided you with this "
5840 "hardware.\n");
5841 }
5842 strcpy(netdev->name, "eth%d");
5843 err = register_netdev(netdev);
5844 if (err)
5845 goto err_register;
5846
5847 /* carrier off reporting is important to ethtool even BEFORE open */
5848 netif_carrier_off(netdev);
5849
5850 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
5851 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
5852 INIT_WORK(&adapter->fdir_reinit_task, ixgbe_fdir_reinit_task);
5853
5854 #ifdef CONFIG_IXGBE_DCA
5855 if (dca_add_requester(&pdev->dev) == 0) {
5856 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
5857 ixgbe_setup_dca(adapter);
5858 }
5859 #endif
5860 /* add san mac addr to netdev */
5861 ixgbe_add_sanmac_netdev(netdev);
5862
5863 dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
5864 cards_found++;
5865 return 0;
5866
5867 err_register:
5868 ixgbe_release_hw_control(adapter);
5869 ixgbe_clear_interrupt_scheme(adapter);
5870 err_sw_init:
5871 err_eeprom:
5872 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5873 del_timer_sync(&adapter->sfp_timer);
5874 cancel_work_sync(&adapter->sfp_task);
5875 cancel_work_sync(&adapter->multispeed_fiber_task);
5876 cancel_work_sync(&adapter->sfp_config_module_task);
5877 iounmap(hw->hw_addr);
5878 err_ioremap:
5879 free_netdev(netdev);
5880 err_alloc_etherdev:
5881 pci_release_selected_regions(pdev, pci_select_bars(pdev,
5882 IORESOURCE_MEM));
5883 err_pci_reg:
5884 err_dma:
5885 pci_disable_device(pdev);
5886 return err;
5887 }
5888
5889 /**
5890 * ixgbe_remove - Device Removal Routine
5891 * @pdev: PCI device information struct
5892 *
5893 * ixgbe_remove is called by the PCI subsystem to alert the driver
5894 * that it should release a PCI device. The could be caused by a
5895 * Hot-Plug event, or because the driver is going to be removed from
5896 * memory.
5897 **/
5898 static void __devexit ixgbe_remove(struct pci_dev *pdev)
5899 {
5900 struct net_device *netdev = pci_get_drvdata(pdev);
5901 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5902
5903 set_bit(__IXGBE_DOWN, &adapter->state);
5904 /* clear the module not found bit to make sure the worker won't
5905 * reschedule
5906 */
5907 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5908 del_timer_sync(&adapter->watchdog_timer);
5909
5910 del_timer_sync(&adapter->sfp_timer);
5911 cancel_work_sync(&adapter->watchdog_task);
5912 cancel_work_sync(&adapter->sfp_task);
5913 cancel_work_sync(&adapter->multispeed_fiber_task);
5914 cancel_work_sync(&adapter->sfp_config_module_task);
5915 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
5916 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
5917 cancel_work_sync(&adapter->fdir_reinit_task);
5918 flush_scheduled_work();
5919
5920 #ifdef CONFIG_IXGBE_DCA
5921 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
5922 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
5923 dca_remove_requester(&pdev->dev);
5924 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
5925 }
5926
5927 #endif
5928 #ifdef IXGBE_FCOE
5929 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
5930 ixgbe_cleanup_fcoe(adapter);
5931
5932 #endif /* IXGBE_FCOE */
5933
5934 /* remove the added san mac */
5935 ixgbe_del_sanmac_netdev(netdev);
5936
5937 if (netdev->reg_state == NETREG_REGISTERED)
5938 unregister_netdev(netdev);
5939
5940 ixgbe_clear_interrupt_scheme(adapter);
5941
5942 ixgbe_release_hw_control(adapter);
5943
5944 iounmap(adapter->hw.hw_addr);
5945 pci_release_selected_regions(pdev, pci_select_bars(pdev,
5946 IORESOURCE_MEM));
5947
5948 DPRINTK(PROBE, INFO, "complete\n");
5949
5950 free_netdev(netdev);
5951
5952 pci_disable_pcie_error_reporting(pdev);
5953
5954 pci_disable_device(pdev);
5955 }
5956
5957 /**
5958 * ixgbe_io_error_detected - called when PCI error is detected
5959 * @pdev: Pointer to PCI device
5960 * @state: The current pci connection state
5961 *
5962 * This function is called after a PCI bus error affecting
5963 * this device has been detected.
5964 */
5965 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
5966 pci_channel_state_t state)
5967 {
5968 struct net_device *netdev = pci_get_drvdata(pdev);
5969 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5970
5971 netif_device_detach(netdev);
5972
5973 if (state == pci_channel_io_perm_failure)
5974 return PCI_ERS_RESULT_DISCONNECT;
5975
5976 if (netif_running(netdev))
5977 ixgbe_down(adapter);
5978 pci_disable_device(pdev);
5979
5980 /* Request a slot reset. */
5981 return PCI_ERS_RESULT_NEED_RESET;
5982 }
5983
5984 /**
5985 * ixgbe_io_slot_reset - called after the pci bus has been reset.
5986 * @pdev: Pointer to PCI device
5987 *
5988 * Restart the card from scratch, as if from a cold-boot.
5989 */
5990 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
5991 {
5992 struct net_device *netdev = pci_get_drvdata(pdev);
5993 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5994 pci_ers_result_t result;
5995 int err;
5996
5997 if (pci_enable_device_mem(pdev)) {
5998 DPRINTK(PROBE, ERR,
5999 "Cannot re-enable PCI device after reset.\n");
6000 result = PCI_ERS_RESULT_DISCONNECT;
6001 } else {
6002 pci_set_master(pdev);
6003 pci_restore_state(pdev);
6004 pci_save_state(pdev);
6005
6006 pci_wake_from_d3(pdev, false);
6007
6008 ixgbe_reset(adapter);
6009 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
6010 result = PCI_ERS_RESULT_RECOVERED;
6011 }
6012
6013 err = pci_cleanup_aer_uncorrect_error_status(pdev);
6014 if (err) {
6015 dev_err(&pdev->dev,
6016 "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n", err);
6017 /* non-fatal, continue */
6018 }
6019
6020 return result;
6021 }
6022
6023 /**
6024 * ixgbe_io_resume - called when traffic can start flowing again.
6025 * @pdev: Pointer to PCI device
6026 *
6027 * This callback is called when the error recovery driver tells us that
6028 * its OK to resume normal operation.
6029 */
6030 static void ixgbe_io_resume(struct pci_dev *pdev)
6031 {
6032 struct net_device *netdev = pci_get_drvdata(pdev);
6033 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6034
6035 if (netif_running(netdev)) {
6036 if (ixgbe_up(adapter)) {
6037 DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
6038 return;
6039 }
6040 }
6041
6042 netif_device_attach(netdev);
6043 }
6044
6045 static struct pci_error_handlers ixgbe_err_handler = {
6046 .error_detected = ixgbe_io_error_detected,
6047 .slot_reset = ixgbe_io_slot_reset,
6048 .resume = ixgbe_io_resume,
6049 };
6050
6051 static struct pci_driver ixgbe_driver = {
6052 .name = ixgbe_driver_name,
6053 .id_table = ixgbe_pci_tbl,
6054 .probe = ixgbe_probe,
6055 .remove = __devexit_p(ixgbe_remove),
6056 #ifdef CONFIG_PM
6057 .suspend = ixgbe_suspend,
6058 .resume = ixgbe_resume,
6059 #endif
6060 .shutdown = ixgbe_shutdown,
6061 .err_handler = &ixgbe_err_handler
6062 };
6063
6064 /**
6065 * ixgbe_init_module - Driver Registration Routine
6066 *
6067 * ixgbe_init_module is the first routine called when the driver is
6068 * loaded. All it does is register with the PCI subsystem.
6069 **/
6070 static int __init ixgbe_init_module(void)
6071 {
6072 int ret;
6073 printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
6074 ixgbe_driver_string, ixgbe_driver_version);
6075
6076 printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
6077
6078 #ifdef CONFIG_IXGBE_DCA
6079 dca_register_notify(&dca_notifier);
6080 #endif
6081
6082 ret = pci_register_driver(&ixgbe_driver);
6083 return ret;
6084 }
6085
6086 module_init(ixgbe_init_module);
6087
6088 /**
6089 * ixgbe_exit_module - Driver Exit Cleanup Routine
6090 *
6091 * ixgbe_exit_module is called just before the driver is removed
6092 * from memory.
6093 **/
6094 static void __exit ixgbe_exit_module(void)
6095 {
6096 #ifdef CONFIG_IXGBE_DCA
6097 dca_unregister_notify(&dca_notifier);
6098 #endif
6099 pci_unregister_driver(&ixgbe_driver);
6100 }
6101
6102 #ifdef CONFIG_IXGBE_DCA
6103 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
6104 void *p)
6105 {
6106 int ret_val;
6107
6108 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
6109 __ixgbe_notify_dca);
6110
6111 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
6112 }
6113
6114 #endif /* CONFIG_IXGBE_DCA */
6115 #ifdef DEBUG
6116 /**
6117 * ixgbe_get_hw_dev_name - return device name string
6118 * used by hardware layer to print debugging information
6119 **/
6120 char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw)
6121 {
6122 struct ixgbe_adapter *adapter = hw->back;
6123 return adapter->netdev->name;
6124 }
6125
6126 #endif
6127 module_exit(ixgbe_exit_module);
6128
6129 /* ixgbe_main.c */
Linux kernel - Deliverables
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