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Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[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/ipv6.h>
38 #include <net/checksum.h>
39 #include <net/ip6_checksum.h>
40 #include <linux/ethtool.h>
41 #include <linux/if_vlan.h>
42 #include <scsi/fc/fc_fcoe.h>
43
44 #include "ixgbe.h"
45 #include "ixgbe_common.h"
46
47 char ixgbe_driver_name[] = "ixgbe";
48 static const char ixgbe_driver_string[] =
49 "Intel(R) 10 Gigabit PCI Express Network Driver";
50
51 #define DRV_VERSION "2.0.24-k2"
52 const char ixgbe_driver_version[] = DRV_VERSION;
53 static char ixgbe_copyright[] = "Copyright (c) 1999-2009 Intel Corporation.";
54
55 static const struct ixgbe_info *ixgbe_info_tbl[] = {
56 [board_82598] = &ixgbe_82598_info,
57 [board_82599] = &ixgbe_82599_info,
58 };
59
60 /* ixgbe_pci_tbl - PCI Device ID Table
61 *
62 * Wildcard entries (PCI_ANY_ID) should come last
63 * Last entry must be all 0s
64 *
65 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
66 * Class, Class Mask, private data (not used) }
67 */
68 static struct pci_device_id ixgbe_pci_tbl[] = {
69 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598),
70 board_82598 },
71 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
72 board_82598 },
73 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
74 board_82598 },
75 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT),
76 board_82598 },
77 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
78 board_82598 },
79 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT),
80 board_82598 },
81 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT),
82 board_82598 },
83 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM),
84 board_82598 },
85 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR),
86 board_82598 },
87 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM),
88 board_82598 },
89 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX),
90 board_82598 },
91 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4),
92 board_82599 },
93 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM),
94 board_82599 },
95 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP),
96 board_82599 },
97
98 /* required last entry */
99 {0, }
100 };
101 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
102
103 #ifdef CONFIG_IXGBE_DCA
104 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
105 void *p);
106 static struct notifier_block dca_notifier = {
107 .notifier_call = ixgbe_notify_dca,
108 .next = NULL,
109 .priority = 0
110 };
111 #endif
112
113 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
114 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
115 MODULE_LICENSE("GPL");
116 MODULE_VERSION(DRV_VERSION);
117
118 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
119
120 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
121 {
122 u32 ctrl_ext;
123
124 /* Let firmware take over control of h/w */
125 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
126 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
127 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
128 }
129
130 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
131 {
132 u32 ctrl_ext;
133
134 /* Let firmware know the driver has taken over */
135 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
136 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
137 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
138 }
139
140 /*
141 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
142 * @adapter: pointer to adapter struct
143 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
144 * @queue: queue to map the corresponding interrupt to
145 * @msix_vector: the vector to map to the corresponding queue
146 *
147 */
148 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
149 u8 queue, u8 msix_vector)
150 {
151 u32 ivar, index;
152 struct ixgbe_hw *hw = &adapter->hw;
153 switch (hw->mac.type) {
154 case ixgbe_mac_82598EB:
155 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
156 if (direction == -1)
157 direction = 0;
158 index = (((direction * 64) + queue) >> 2) & 0x1F;
159 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
160 ivar &= ~(0xFF << (8 * (queue & 0x3)));
161 ivar |= (msix_vector << (8 * (queue & 0x3)));
162 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
163 break;
164 case ixgbe_mac_82599EB:
165 if (direction == -1) {
166 /* other causes */
167 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
168 index = ((queue & 1) * 8);
169 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
170 ivar &= ~(0xFF << index);
171 ivar |= (msix_vector << index);
172 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
173 break;
174 } else {
175 /* tx or rx causes */
176 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
177 index = ((16 * (queue & 1)) + (8 * direction));
178 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
179 ivar &= ~(0xFF << index);
180 ivar |= (msix_vector << index);
181 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
182 break;
183 }
184 default:
185 break;
186 }
187 }
188
189 static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
190 struct ixgbe_tx_buffer
191 *tx_buffer_info)
192 {
193 tx_buffer_info->dma = 0;
194 if (tx_buffer_info->skb) {
195 skb_dma_unmap(&adapter->pdev->dev, tx_buffer_info->skb,
196 DMA_TO_DEVICE);
197 dev_kfree_skb_any(tx_buffer_info->skb);
198 tx_buffer_info->skb = NULL;
199 }
200 tx_buffer_info->time_stamp = 0;
201 /* tx_buffer_info must be completely set up in the transmit path */
202 }
203
204 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
205 struct ixgbe_ring *tx_ring,
206 unsigned int eop)
207 {
208 struct ixgbe_hw *hw = &adapter->hw;
209
210 /* Detect a transmit hang in hardware, this serializes the
211 * check with the clearing of time_stamp and movement of eop */
212 adapter->detect_tx_hung = false;
213 if (tx_ring->tx_buffer_info[eop].time_stamp &&
214 time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
215 !(IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & IXGBE_TFCS_TXOFF)) {
216 /* detected Tx unit hang */
217 union ixgbe_adv_tx_desc *tx_desc;
218 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
219 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
220 " Tx Queue <%d>\n"
221 " TDH, TDT <%x>, <%x>\n"
222 " next_to_use <%x>\n"
223 " next_to_clean <%x>\n"
224 "tx_buffer_info[next_to_clean]\n"
225 " time_stamp <%lx>\n"
226 " jiffies <%lx>\n",
227 tx_ring->queue_index,
228 IXGBE_READ_REG(hw, tx_ring->head),
229 IXGBE_READ_REG(hw, tx_ring->tail),
230 tx_ring->next_to_use, eop,
231 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
232 return true;
233 }
234
235 return false;
236 }
237
238 #define IXGBE_MAX_TXD_PWR 14
239 #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
240
241 /* Tx Descriptors needed, worst case */
242 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
243 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
244 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
245 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
246
247 static void ixgbe_tx_timeout(struct net_device *netdev);
248
249 /**
250 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
251 * @adapter: board private structure
252 * @tx_ring: tx ring to clean
253 *
254 * returns true if transmit work is done
255 **/
256 static bool ixgbe_clean_tx_irq(struct ixgbe_adapter *adapter,
257 struct ixgbe_ring *tx_ring)
258 {
259 struct net_device *netdev = adapter->netdev;
260 union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
261 struct ixgbe_tx_buffer *tx_buffer_info;
262 unsigned int i, eop, count = 0;
263 unsigned int total_bytes = 0, total_packets = 0;
264
265 i = tx_ring->next_to_clean;
266 eop = tx_ring->tx_buffer_info[i].next_to_watch;
267 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
268
269 while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
270 (count < tx_ring->work_limit)) {
271 bool cleaned = false;
272 for ( ; !cleaned; count++) {
273 struct sk_buff *skb;
274 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
275 tx_buffer_info = &tx_ring->tx_buffer_info[i];
276 cleaned = (i == eop);
277 skb = tx_buffer_info->skb;
278
279 if (cleaned && skb) {
280 unsigned int segs, bytecount;
281
282 /* gso_segs is currently only valid for tcp */
283 segs = skb_shinfo(skb)->gso_segs ?: 1;
284 /* multiply data chunks by size of headers */
285 bytecount = ((segs - 1) * skb_headlen(skb)) +
286 skb->len;
287 total_packets += segs;
288 total_bytes += bytecount;
289 }
290
291 ixgbe_unmap_and_free_tx_resource(adapter,
292 tx_buffer_info);
293
294 tx_desc->wb.status = 0;
295
296 i++;
297 if (i == tx_ring->count)
298 i = 0;
299 }
300
301 eop = tx_ring->tx_buffer_info[i].next_to_watch;
302 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
303 }
304
305 tx_ring->next_to_clean = i;
306
307 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
308 if (unlikely(count && netif_carrier_ok(netdev) &&
309 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
310 /* Make sure that anybody stopping the queue after this
311 * sees the new next_to_clean.
312 */
313 smp_mb();
314 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
315 !test_bit(__IXGBE_DOWN, &adapter->state)) {
316 netif_wake_subqueue(netdev, tx_ring->queue_index);
317 ++adapter->restart_queue;
318 }
319 }
320
321 if (adapter->detect_tx_hung) {
322 if (ixgbe_check_tx_hang(adapter, tx_ring, i)) {
323 /* schedule immediate reset if we believe we hung */
324 DPRINTK(PROBE, INFO,
325 "tx hang %d detected, resetting adapter\n",
326 adapter->tx_timeout_count + 1);
327 ixgbe_tx_timeout(adapter->netdev);
328 }
329 }
330
331 /* re-arm the interrupt */
332 if (count >= tx_ring->work_limit) {
333 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
334 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS,
335 tx_ring->v_idx);
336 else if (tx_ring->v_idx & 0xFFFFFFFF)
337 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0),
338 tx_ring->v_idx);
339 else
340 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1),
341 (tx_ring->v_idx >> 32));
342 }
343
344
345 tx_ring->total_bytes += total_bytes;
346 tx_ring->total_packets += total_packets;
347 tx_ring->stats.packets += total_packets;
348 tx_ring->stats.bytes += total_bytes;
349 adapter->net_stats.tx_bytes += total_bytes;
350 adapter->net_stats.tx_packets += total_packets;
351 return (count < tx_ring->work_limit);
352 }
353
354 #ifdef CONFIG_IXGBE_DCA
355 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
356 struct ixgbe_ring *rx_ring)
357 {
358 u32 rxctrl;
359 int cpu = get_cpu();
360 int q = rx_ring - adapter->rx_ring;
361
362 if (rx_ring->cpu != cpu) {
363 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
364 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
365 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
366 rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
367 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
368 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
369 rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
370 IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
371 }
372 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
373 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
374 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
375 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_WRO_EN |
376 IXGBE_DCA_RXCTRL_DESC_HSRO_EN);
377 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
378 rx_ring->cpu = cpu;
379 }
380 put_cpu();
381 }
382
383 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
384 struct ixgbe_ring *tx_ring)
385 {
386 u32 txctrl;
387 int cpu = get_cpu();
388 int q = tx_ring - adapter->tx_ring;
389
390 if (tx_ring->cpu != cpu) {
391 txctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q));
392 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
393 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
394 txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
395 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
396 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
397 txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
398 IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
399 }
400 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
401 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q), txctrl);
402 tx_ring->cpu = cpu;
403 }
404 put_cpu();
405 }
406
407 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
408 {
409 int i;
410
411 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
412 return;
413
414 /* always use CB2 mode, difference is masked in the CB driver */
415 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
416
417 for (i = 0; i < adapter->num_tx_queues; i++) {
418 adapter->tx_ring[i].cpu = -1;
419 ixgbe_update_tx_dca(adapter, &adapter->tx_ring[i]);
420 }
421 for (i = 0; i < adapter->num_rx_queues; i++) {
422 adapter->rx_ring[i].cpu = -1;
423 ixgbe_update_rx_dca(adapter, &adapter->rx_ring[i]);
424 }
425 }
426
427 static int __ixgbe_notify_dca(struct device *dev, void *data)
428 {
429 struct net_device *netdev = dev_get_drvdata(dev);
430 struct ixgbe_adapter *adapter = netdev_priv(netdev);
431 unsigned long event = *(unsigned long *)data;
432
433 switch (event) {
434 case DCA_PROVIDER_ADD:
435 /* if we're already enabled, don't do it again */
436 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
437 break;
438 if (dca_add_requester(dev) == 0) {
439 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
440 ixgbe_setup_dca(adapter);
441 break;
442 }
443 /* Fall Through since DCA is disabled. */
444 case DCA_PROVIDER_REMOVE:
445 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
446 dca_remove_requester(dev);
447 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
448 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
449 }
450 break;
451 }
452
453 return 0;
454 }
455
456 #endif /* CONFIG_IXGBE_DCA */
457 /**
458 * ixgbe_receive_skb - Send a completed packet up the stack
459 * @adapter: board private structure
460 * @skb: packet to send up
461 * @status: hardware indication of status of receive
462 * @rx_ring: rx descriptor ring (for a specific queue) to setup
463 * @rx_desc: rx descriptor
464 **/
465 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
466 struct sk_buff *skb, u8 status,
467 struct ixgbe_ring *ring,
468 union ixgbe_adv_rx_desc *rx_desc)
469 {
470 struct ixgbe_adapter *adapter = q_vector->adapter;
471 struct napi_struct *napi = &q_vector->napi;
472 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
473 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
474
475 skb_record_rx_queue(skb, ring->queue_index);
476 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
477 if (adapter->vlgrp && is_vlan && (tag != 0))
478 vlan_gro_receive(napi, adapter->vlgrp, tag, skb);
479 else
480 napi_gro_receive(napi, skb);
481 } else {
482 if (adapter->vlgrp && is_vlan && (tag != 0))
483 vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
484 else
485 netif_rx(skb);
486 }
487 }
488
489 /**
490 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
491 * @adapter: address of board private structure
492 * @status_err: hardware indication of status of receive
493 * @skb: skb currently being received and modified
494 **/
495 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
496 u32 status_err, struct sk_buff *skb)
497 {
498 skb->ip_summed = CHECKSUM_NONE;
499
500 /* Rx csum disabled */
501 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
502 return;
503
504 /* if IP and error */
505 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
506 (status_err & IXGBE_RXDADV_ERR_IPE)) {
507 adapter->hw_csum_rx_error++;
508 return;
509 }
510
511 if (!(status_err & IXGBE_RXD_STAT_L4CS))
512 return;
513
514 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
515 adapter->hw_csum_rx_error++;
516 return;
517 }
518
519 /* It must be a TCP or UDP packet with a valid checksum */
520 skb->ip_summed = CHECKSUM_UNNECESSARY;
521 adapter->hw_csum_rx_good++;
522 }
523
524 static inline void ixgbe_release_rx_desc(struct ixgbe_hw *hw,
525 struct ixgbe_ring *rx_ring, u32 val)
526 {
527 /*
528 * Force memory writes to complete before letting h/w
529 * know there are new descriptors to fetch. (Only
530 * applicable for weak-ordered memory model archs,
531 * such as IA-64).
532 */
533 wmb();
534 IXGBE_WRITE_REG(hw, IXGBE_RDT(rx_ring->reg_idx), val);
535 }
536
537 /**
538 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
539 * @adapter: address of board private structure
540 **/
541 static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
542 struct ixgbe_ring *rx_ring,
543 int cleaned_count)
544 {
545 struct pci_dev *pdev = adapter->pdev;
546 union ixgbe_adv_rx_desc *rx_desc;
547 struct ixgbe_rx_buffer *bi;
548 unsigned int i;
549 unsigned int bufsz = rx_ring->rx_buf_len + NET_IP_ALIGN;
550
551 i = rx_ring->next_to_use;
552 bi = &rx_ring->rx_buffer_info[i];
553
554 while (cleaned_count--) {
555 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
556
557 if (!bi->page_dma &&
558 (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) {
559 if (!bi->page) {
560 bi->page = alloc_page(GFP_ATOMIC);
561 if (!bi->page) {
562 adapter->alloc_rx_page_failed++;
563 goto no_buffers;
564 }
565 bi->page_offset = 0;
566 } else {
567 /* use a half page if we're re-using */
568 bi->page_offset ^= (PAGE_SIZE / 2);
569 }
570
571 bi->page_dma = pci_map_page(pdev, bi->page,
572 bi->page_offset,
573 (PAGE_SIZE / 2),
574 PCI_DMA_FROMDEVICE);
575 }
576
577 if (!bi->skb) {
578 struct sk_buff *skb;
579 skb = netdev_alloc_skb(adapter->netdev, bufsz);
580
581 if (!skb) {
582 adapter->alloc_rx_buff_failed++;
583 goto no_buffers;
584 }
585
586 /*
587 * Make buffer alignment 2 beyond a 16 byte boundary
588 * this will result in a 16 byte aligned IP header after
589 * the 14 byte MAC header is removed
590 */
591 skb_reserve(skb, NET_IP_ALIGN);
592
593 bi->skb = skb;
594 bi->dma = pci_map_single(pdev, skb->data, bufsz,
595 PCI_DMA_FROMDEVICE);
596 }
597 /* Refresh the desc even if buffer_addrs didn't change because
598 * each write-back erases this info. */
599 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
600 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
601 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
602 } else {
603 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
604 }
605
606 i++;
607 if (i == rx_ring->count)
608 i = 0;
609 bi = &rx_ring->rx_buffer_info[i];
610 }
611
612 no_buffers:
613 if (rx_ring->next_to_use != i) {
614 rx_ring->next_to_use = i;
615 if (i-- == 0)
616 i = (rx_ring->count - 1);
617
618 ixgbe_release_rx_desc(&adapter->hw, rx_ring, i);
619 }
620 }
621
622 static inline u16 ixgbe_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
623 {
624 return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
625 }
626
627 static inline u16 ixgbe_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
628 {
629 return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
630 }
631
632 static inline u32 ixgbe_get_rsc_count(union ixgbe_adv_rx_desc *rx_desc)
633 {
634 return (le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
635 IXGBE_RXDADV_RSCCNT_MASK) >>
636 IXGBE_RXDADV_RSCCNT_SHIFT;
637 }
638
639 /**
640 * ixgbe_transform_rsc_queue - change rsc queue into a full packet
641 * @skb: pointer to the last skb in the rsc queue
642 *
643 * This function changes a queue full of hw rsc buffers into a completed
644 * packet. It uses the ->prev pointers to find the first packet and then
645 * turns it into the frag list owner.
646 **/
647 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb)
648 {
649 unsigned int frag_list_size = 0;
650
651 while (skb->prev) {
652 struct sk_buff *prev = skb->prev;
653 frag_list_size += skb->len;
654 skb->prev = NULL;
655 skb = prev;
656 }
657
658 skb_shinfo(skb)->frag_list = skb->next;
659 skb->next = NULL;
660 skb->len += frag_list_size;
661 skb->data_len += frag_list_size;
662 skb->truesize += frag_list_size;
663 return skb;
664 }
665
666 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
667 struct ixgbe_ring *rx_ring,
668 int *work_done, int work_to_do)
669 {
670 struct ixgbe_adapter *adapter = q_vector->adapter;
671 struct pci_dev *pdev = adapter->pdev;
672 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
673 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
674 struct sk_buff *skb;
675 unsigned int i, rsc_count = 0;
676 u32 len, staterr;
677 u16 hdr_info;
678 bool cleaned = false;
679 int cleaned_count = 0;
680 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
681
682 i = rx_ring->next_to_clean;
683 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
684 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
685 rx_buffer_info = &rx_ring->rx_buffer_info[i];
686
687 while (staterr & IXGBE_RXD_STAT_DD) {
688 u32 upper_len = 0;
689 if (*work_done >= work_to_do)
690 break;
691 (*work_done)++;
692
693 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
694 hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
695 len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
696 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
697 if (hdr_info & IXGBE_RXDADV_SPH)
698 adapter->rx_hdr_split++;
699 if (len > IXGBE_RX_HDR_SIZE)
700 len = IXGBE_RX_HDR_SIZE;
701 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
702 } else {
703 len = le16_to_cpu(rx_desc->wb.upper.length);
704 }
705
706 cleaned = true;
707 skb = rx_buffer_info->skb;
708 prefetch(skb->data - NET_IP_ALIGN);
709 rx_buffer_info->skb = NULL;
710
711 if (len && !skb_shinfo(skb)->nr_frags) {
712 pci_unmap_single(pdev, rx_buffer_info->dma,
713 rx_ring->rx_buf_len,
714 PCI_DMA_FROMDEVICE);
715 skb_put(skb, len);
716 }
717
718 if (upper_len) {
719 pci_unmap_page(pdev, rx_buffer_info->page_dma,
720 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
721 rx_buffer_info->page_dma = 0;
722 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
723 rx_buffer_info->page,
724 rx_buffer_info->page_offset,
725 upper_len);
726
727 if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
728 (page_count(rx_buffer_info->page) != 1))
729 rx_buffer_info->page = NULL;
730 else
731 get_page(rx_buffer_info->page);
732
733 skb->len += upper_len;
734 skb->data_len += upper_len;
735 skb->truesize += upper_len;
736 }
737
738 i++;
739 if (i == rx_ring->count)
740 i = 0;
741
742 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
743 prefetch(next_rxd);
744 cleaned_count++;
745
746 if (adapter->flags & IXGBE_FLAG_RSC_CAPABLE)
747 rsc_count = ixgbe_get_rsc_count(rx_desc);
748
749 if (rsc_count) {
750 u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
751 IXGBE_RXDADV_NEXTP_SHIFT;
752 next_buffer = &rx_ring->rx_buffer_info[nextp];
753 rx_ring->rsc_count += (rsc_count - 1);
754 } else {
755 next_buffer = &rx_ring->rx_buffer_info[i];
756 }
757
758 if (staterr & IXGBE_RXD_STAT_EOP) {
759 if (skb->prev)
760 skb = ixgbe_transform_rsc_queue(skb);
761 rx_ring->stats.packets++;
762 rx_ring->stats.bytes += skb->len;
763 } else {
764 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
765 rx_buffer_info->skb = next_buffer->skb;
766 rx_buffer_info->dma = next_buffer->dma;
767 next_buffer->skb = skb;
768 next_buffer->dma = 0;
769 } else {
770 skb->next = next_buffer->skb;
771 skb->next->prev = skb;
772 }
773 adapter->non_eop_descs++;
774 goto next_desc;
775 }
776
777 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
778 dev_kfree_skb_irq(skb);
779 goto next_desc;
780 }
781
782 ixgbe_rx_checksum(adapter, staterr, skb);
783
784 /* probably a little skewed due to removing CRC */
785 total_rx_bytes += skb->len;
786 total_rx_packets++;
787
788 skb->protocol = eth_type_trans(skb, adapter->netdev);
789 #ifdef IXGBE_FCOE
790 /* if ddp, not passing to ULD unless for FCP_RSP or error */
791 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
792 if (!ixgbe_fcoe_ddp(adapter, rx_desc, skb))
793 goto next_desc;
794 #endif /* IXGBE_FCOE */
795 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
796
797 next_desc:
798 rx_desc->wb.upper.status_error = 0;
799
800 /* return some buffers to hardware, one at a time is too slow */
801 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
802 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
803 cleaned_count = 0;
804 }
805
806 /* use prefetched values */
807 rx_desc = next_rxd;
808 rx_buffer_info = &rx_ring->rx_buffer_info[i];
809
810 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
811 }
812
813 rx_ring->next_to_clean = i;
814 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
815
816 if (cleaned_count)
817 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
818
819 rx_ring->total_packets += total_rx_packets;
820 rx_ring->total_bytes += total_rx_bytes;
821 adapter->net_stats.rx_bytes += total_rx_bytes;
822 adapter->net_stats.rx_packets += total_rx_packets;
823
824 return cleaned;
825 }
826
827 static int ixgbe_clean_rxonly(struct napi_struct *, int);
828 /**
829 * ixgbe_configure_msix - Configure MSI-X hardware
830 * @adapter: board private structure
831 *
832 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
833 * interrupts.
834 **/
835 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
836 {
837 struct ixgbe_q_vector *q_vector;
838 int i, j, q_vectors, v_idx, r_idx;
839 u32 mask;
840
841 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
842
843 /*
844 * Populate the IVAR table and set the ITR values to the
845 * corresponding register.
846 */
847 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
848 q_vector = adapter->q_vector[v_idx];
849 /* XXX for_each_bit(...) */
850 r_idx = find_first_bit(q_vector->rxr_idx,
851 adapter->num_rx_queues);
852
853 for (i = 0; i < q_vector->rxr_count; i++) {
854 j = adapter->rx_ring[r_idx].reg_idx;
855 ixgbe_set_ivar(adapter, 0, j, v_idx);
856 r_idx = find_next_bit(q_vector->rxr_idx,
857 adapter->num_rx_queues,
858 r_idx + 1);
859 }
860 r_idx = find_first_bit(q_vector->txr_idx,
861 adapter->num_tx_queues);
862
863 for (i = 0; i < q_vector->txr_count; i++) {
864 j = adapter->tx_ring[r_idx].reg_idx;
865 ixgbe_set_ivar(adapter, 1, j, v_idx);
866 r_idx = find_next_bit(q_vector->txr_idx,
867 adapter->num_tx_queues,
868 r_idx + 1);
869 }
870
871 /* if this is a tx only vector halve the interrupt rate */
872 if (q_vector->txr_count && !q_vector->rxr_count)
873 q_vector->eitr = (adapter->eitr_param >> 1);
874 else if (q_vector->rxr_count)
875 /* rx only */
876 q_vector->eitr = adapter->eitr_param;
877
878 /*
879 * since this is initial set up don't need to call
880 * ixgbe_write_eitr helper
881 */
882 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx),
883 EITR_INTS_PER_SEC_TO_REG(q_vector->eitr));
884 }
885
886 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
887 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
888 v_idx);
889 else if (adapter->hw.mac.type == ixgbe_mac_82599EB)
890 ixgbe_set_ivar(adapter, -1, 1, v_idx);
891 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
892
893 /* set up to autoclear timer, and the vectors */
894 mask = IXGBE_EIMS_ENABLE_MASK;
895 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
896 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
897 }
898
899 enum latency_range {
900 lowest_latency = 0,
901 low_latency = 1,
902 bulk_latency = 2,
903 latency_invalid = 255
904 };
905
906 /**
907 * ixgbe_update_itr - update the dynamic ITR value based on statistics
908 * @adapter: pointer to adapter
909 * @eitr: eitr setting (ints per sec) to give last timeslice
910 * @itr_setting: current throttle rate in ints/second
911 * @packets: the number of packets during this measurement interval
912 * @bytes: the number of bytes during this measurement interval
913 *
914 * Stores a new ITR value based on packets and byte
915 * counts during the last interrupt. The advantage of per interrupt
916 * computation is faster updates and more accurate ITR for the current
917 * traffic pattern. Constants in this function were computed
918 * based on theoretical maximum wire speed and thresholds were set based
919 * on testing data as well as attempting to minimize response time
920 * while increasing bulk throughput.
921 * this functionality is controlled by the InterruptThrottleRate module
922 * parameter (see ixgbe_param.c)
923 **/
924 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
925 u32 eitr, u8 itr_setting,
926 int packets, int bytes)
927 {
928 unsigned int retval = itr_setting;
929 u32 timepassed_us;
930 u64 bytes_perint;
931
932 if (packets == 0)
933 goto update_itr_done;
934
935
936 /* simple throttlerate management
937 * 0-20MB/s lowest (100000 ints/s)
938 * 20-100MB/s low (20000 ints/s)
939 * 100-1249MB/s bulk (8000 ints/s)
940 */
941 /* what was last interrupt timeslice? */
942 timepassed_us = 1000000/eitr;
943 bytes_perint = bytes / timepassed_us; /* bytes/usec */
944
945 switch (itr_setting) {
946 case lowest_latency:
947 if (bytes_perint > adapter->eitr_low)
948 retval = low_latency;
949 break;
950 case low_latency:
951 if (bytes_perint > adapter->eitr_high)
952 retval = bulk_latency;
953 else if (bytes_perint <= adapter->eitr_low)
954 retval = lowest_latency;
955 break;
956 case bulk_latency:
957 if (bytes_perint <= adapter->eitr_high)
958 retval = low_latency;
959 break;
960 }
961
962 update_itr_done:
963 return retval;
964 }
965
966 /**
967 * ixgbe_write_eitr - write EITR register in hardware specific way
968 * @adapter: pointer to adapter struct
969 * @v_idx: vector index into q_vector array
970 * @itr_reg: new value to be written in *register* format, not ints/s
971 *
972 * This function is made to be called by ethtool and by the driver
973 * when it needs to update EITR registers at runtime. Hardware
974 * specific quirks/differences are taken care of here.
975 */
976 void ixgbe_write_eitr(struct ixgbe_adapter *adapter, int v_idx, u32 itr_reg)
977 {
978 struct ixgbe_hw *hw = &adapter->hw;
979 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
980 /* must write high and low 16 bits to reset counter */
981 itr_reg |= (itr_reg << 16);
982 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
983 /*
984 * set the WDIS bit to not clear the timer bits and cause an
985 * immediate assertion of the interrupt
986 */
987 itr_reg |= IXGBE_EITR_CNT_WDIS;
988 }
989 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
990 }
991
992 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
993 {
994 struct ixgbe_adapter *adapter = q_vector->adapter;
995 u32 new_itr;
996 u8 current_itr, ret_itr;
997 int i, r_idx, v_idx = q_vector->v_idx;
998 struct ixgbe_ring *rx_ring, *tx_ring;
999
1000 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1001 for (i = 0; i < q_vector->txr_count; i++) {
1002 tx_ring = &(adapter->tx_ring[r_idx]);
1003 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1004 q_vector->tx_itr,
1005 tx_ring->total_packets,
1006 tx_ring->total_bytes);
1007 /* if the result for this queue would decrease interrupt
1008 * rate for this vector then use that result */
1009 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
1010 q_vector->tx_itr - 1 : ret_itr);
1011 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1012 r_idx + 1);
1013 }
1014
1015 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1016 for (i = 0; i < q_vector->rxr_count; i++) {
1017 rx_ring = &(adapter->rx_ring[r_idx]);
1018 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1019 q_vector->rx_itr,
1020 rx_ring->total_packets,
1021 rx_ring->total_bytes);
1022 /* if the result for this queue would decrease interrupt
1023 * rate for this vector then use that result */
1024 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
1025 q_vector->rx_itr - 1 : ret_itr);
1026 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1027 r_idx + 1);
1028 }
1029
1030 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1031
1032 switch (current_itr) {
1033 /* counts and packets in update_itr are dependent on these numbers */
1034 case lowest_latency:
1035 new_itr = 100000;
1036 break;
1037 case low_latency:
1038 new_itr = 20000; /* aka hwitr = ~200 */
1039 break;
1040 case bulk_latency:
1041 default:
1042 new_itr = 8000;
1043 break;
1044 }
1045
1046 if (new_itr != q_vector->eitr) {
1047 u32 itr_reg;
1048
1049 /* save the algorithm value here, not the smoothed one */
1050 q_vector->eitr = new_itr;
1051 /* do an exponential smoothing */
1052 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1053 itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr);
1054 ixgbe_write_eitr(adapter, v_idx, itr_reg);
1055 }
1056
1057 return;
1058 }
1059
1060 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1061 {
1062 struct ixgbe_hw *hw = &adapter->hw;
1063
1064 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1065 (eicr & IXGBE_EICR_GPI_SDP1)) {
1066 DPRINTK(PROBE, CRIT, "Fan has stopped, replace the adapter\n");
1067 /* write to clear the interrupt */
1068 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1069 }
1070 }
1071
1072 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1073 {
1074 struct ixgbe_hw *hw = &adapter->hw;
1075
1076 if (eicr & IXGBE_EICR_GPI_SDP1) {
1077 /* Clear the interrupt */
1078 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1079 schedule_work(&adapter->multispeed_fiber_task);
1080 } else if (eicr & IXGBE_EICR_GPI_SDP2) {
1081 /* Clear the interrupt */
1082 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1083 schedule_work(&adapter->sfp_config_module_task);
1084 } else {
1085 /* Interrupt isn't for us... */
1086 return;
1087 }
1088 }
1089
1090 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1091 {
1092 struct ixgbe_hw *hw = &adapter->hw;
1093
1094 adapter->lsc_int++;
1095 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1096 adapter->link_check_timeout = jiffies;
1097 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1098 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1099 schedule_work(&adapter->watchdog_task);
1100 }
1101 }
1102
1103 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1104 {
1105 struct net_device *netdev = data;
1106 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1107 struct ixgbe_hw *hw = &adapter->hw;
1108 u32 eicr;
1109
1110 /*
1111 * Workaround for Silicon errata. Use clear-by-write instead
1112 * of clear-by-read. Reading with EICS will return the
1113 * interrupt causes without clearing, which later be done
1114 * with the write to EICR.
1115 */
1116 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1117 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1118
1119 if (eicr & IXGBE_EICR_LSC)
1120 ixgbe_check_lsc(adapter);
1121
1122 if (hw->mac.type == ixgbe_mac_82598EB)
1123 ixgbe_check_fan_failure(adapter, eicr);
1124
1125 if (hw->mac.type == ixgbe_mac_82599EB)
1126 ixgbe_check_sfp_event(adapter, eicr);
1127 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1128 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
1129
1130 return IRQ_HANDLED;
1131 }
1132
1133 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
1134 {
1135 struct ixgbe_q_vector *q_vector = data;
1136 struct ixgbe_adapter *adapter = q_vector->adapter;
1137 struct ixgbe_ring *tx_ring;
1138 int i, r_idx;
1139
1140 if (!q_vector->txr_count)
1141 return IRQ_HANDLED;
1142
1143 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1144 for (i = 0; i < q_vector->txr_count; i++) {
1145 tx_ring = &(adapter->tx_ring[r_idx]);
1146 #ifdef CONFIG_IXGBE_DCA
1147 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1148 ixgbe_update_tx_dca(adapter, tx_ring);
1149 #endif
1150 tx_ring->total_bytes = 0;
1151 tx_ring->total_packets = 0;
1152 ixgbe_clean_tx_irq(adapter, tx_ring);
1153 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1154 r_idx + 1);
1155 }
1156
1157 return IRQ_HANDLED;
1158 }
1159
1160 /**
1161 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
1162 * @irq: unused
1163 * @data: pointer to our q_vector struct for this interrupt vector
1164 **/
1165 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
1166 {
1167 struct ixgbe_q_vector *q_vector = data;
1168 struct ixgbe_adapter *adapter = q_vector->adapter;
1169 struct ixgbe_ring *rx_ring;
1170 int r_idx;
1171 int i;
1172
1173 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1174 for (i = 0; i < q_vector->rxr_count; i++) {
1175 rx_ring = &(adapter->rx_ring[r_idx]);
1176 rx_ring->total_bytes = 0;
1177 rx_ring->total_packets = 0;
1178 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1179 r_idx + 1);
1180 }
1181
1182 if (!q_vector->rxr_count)
1183 return IRQ_HANDLED;
1184
1185 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1186 rx_ring = &(adapter->rx_ring[r_idx]);
1187 /* disable interrupts on this vector only */
1188 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
1189 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, rx_ring->v_idx);
1190 else if (rx_ring->v_idx & 0xFFFFFFFF)
1191 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), rx_ring->v_idx);
1192 else
1193 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1),
1194 (rx_ring->v_idx >> 32));
1195 napi_schedule(&q_vector->napi);
1196
1197 return IRQ_HANDLED;
1198 }
1199
1200 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1201 {
1202 ixgbe_msix_clean_rx(irq, data);
1203 ixgbe_msix_clean_tx(irq, data);
1204
1205 return IRQ_HANDLED;
1206 }
1207
1208 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1209 u64 qmask)
1210 {
1211 u32 mask;
1212
1213 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1214 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1215 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1216 } else {
1217 mask = (qmask & 0xFFFFFFFF);
1218 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(0), mask);
1219 mask = (qmask >> 32);
1220 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(1), mask);
1221 }
1222 /* skip the flush */
1223 }
1224
1225 /**
1226 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1227 * @napi: napi struct with our devices info in it
1228 * @budget: amount of work driver is allowed to do this pass, in packets
1229 *
1230 * This function is optimized for cleaning one queue only on a single
1231 * q_vector!!!
1232 **/
1233 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1234 {
1235 struct ixgbe_q_vector *q_vector =
1236 container_of(napi, struct ixgbe_q_vector, napi);
1237 struct ixgbe_adapter *adapter = q_vector->adapter;
1238 struct ixgbe_ring *rx_ring = NULL;
1239 int work_done = 0;
1240 long r_idx;
1241
1242 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1243 rx_ring = &(adapter->rx_ring[r_idx]);
1244 #ifdef CONFIG_IXGBE_DCA
1245 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1246 ixgbe_update_rx_dca(adapter, rx_ring);
1247 #endif
1248
1249 ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
1250
1251 /* If all Rx work done, exit the polling mode */
1252 if (work_done < budget) {
1253 napi_complete(napi);
1254 if (adapter->itr_setting & 1)
1255 ixgbe_set_itr_msix(q_vector);
1256 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1257 ixgbe_irq_enable_queues(adapter, rx_ring->v_idx);
1258 }
1259
1260 return work_done;
1261 }
1262
1263 /**
1264 * ixgbe_clean_rxonly_many - msix (aka one shot) rx clean routine
1265 * @napi: napi struct with our devices info in it
1266 * @budget: amount of work driver is allowed to do this pass, in packets
1267 *
1268 * This function will clean more than one rx queue associated with a
1269 * q_vector.
1270 **/
1271 static int ixgbe_clean_rxonly_many(struct napi_struct *napi, int budget)
1272 {
1273 struct ixgbe_q_vector *q_vector =
1274 container_of(napi, struct ixgbe_q_vector, napi);
1275 struct ixgbe_adapter *adapter = q_vector->adapter;
1276 struct ixgbe_ring *rx_ring = NULL;
1277 int work_done = 0, i;
1278 long r_idx;
1279 u64 enable_mask = 0;
1280
1281 /* attempt to distribute budget to each queue fairly, but don't allow
1282 * the budget to go below 1 because we'll exit polling */
1283 budget /= (q_vector->rxr_count ?: 1);
1284 budget = max(budget, 1);
1285 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1286 for (i = 0; i < q_vector->rxr_count; i++) {
1287 rx_ring = &(adapter->rx_ring[r_idx]);
1288 #ifdef CONFIG_IXGBE_DCA
1289 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1290 ixgbe_update_rx_dca(adapter, rx_ring);
1291 #endif
1292 ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
1293 enable_mask |= rx_ring->v_idx;
1294 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1295 r_idx + 1);
1296 }
1297
1298 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1299 rx_ring = &(adapter->rx_ring[r_idx]);
1300 /* If all Rx work done, exit the polling mode */
1301 if (work_done < budget) {
1302 napi_complete(napi);
1303 if (adapter->itr_setting & 1)
1304 ixgbe_set_itr_msix(q_vector);
1305 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1306 ixgbe_irq_enable_queues(adapter, enable_mask);
1307 return 0;
1308 }
1309
1310 return work_done;
1311 }
1312 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
1313 int r_idx)
1314 {
1315 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1316
1317 set_bit(r_idx, q_vector->rxr_idx);
1318 q_vector->rxr_count++;
1319 a->rx_ring[r_idx].v_idx = (u64)1 << v_idx;
1320 }
1321
1322 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
1323 int t_idx)
1324 {
1325 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1326
1327 set_bit(t_idx, q_vector->txr_idx);
1328 q_vector->txr_count++;
1329 a->tx_ring[t_idx].v_idx = (u64)1 << v_idx;
1330 }
1331
1332 /**
1333 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
1334 * @adapter: board private structure to initialize
1335 * @vectors: allotted vector count for descriptor rings
1336 *
1337 * This function maps descriptor rings to the queue-specific vectors
1338 * we were allotted through the MSI-X enabling code. Ideally, we'd have
1339 * one vector per ring/queue, but on a constrained vector budget, we
1340 * group the rings as "efficiently" as possible. You would add new
1341 * mapping configurations in here.
1342 **/
1343 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
1344 int vectors)
1345 {
1346 int v_start = 0;
1347 int rxr_idx = 0, txr_idx = 0;
1348 int rxr_remaining = adapter->num_rx_queues;
1349 int txr_remaining = adapter->num_tx_queues;
1350 int i, j;
1351 int rqpv, tqpv;
1352 int err = 0;
1353
1354 /* No mapping required if MSI-X is disabled. */
1355 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1356 goto out;
1357
1358 /*
1359 * The ideal configuration...
1360 * We have enough vectors to map one per queue.
1361 */
1362 if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1363 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1364 map_vector_to_rxq(adapter, v_start, rxr_idx);
1365
1366 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1367 map_vector_to_txq(adapter, v_start, txr_idx);
1368
1369 goto out;
1370 }
1371
1372 /*
1373 * If we don't have enough vectors for a 1-to-1
1374 * mapping, we'll have to group them so there are
1375 * multiple queues per vector.
1376 */
1377 /* Re-adjusting *qpv takes care of the remainder. */
1378 for (i = v_start; i < vectors; i++) {
1379 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
1380 for (j = 0; j < rqpv; j++) {
1381 map_vector_to_rxq(adapter, i, rxr_idx);
1382 rxr_idx++;
1383 rxr_remaining--;
1384 }
1385 }
1386 for (i = v_start; i < vectors; i++) {
1387 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
1388 for (j = 0; j < tqpv; j++) {
1389 map_vector_to_txq(adapter, i, txr_idx);
1390 txr_idx++;
1391 txr_remaining--;
1392 }
1393 }
1394
1395 out:
1396 return err;
1397 }
1398
1399 /**
1400 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
1401 * @adapter: board private structure
1402 *
1403 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
1404 * interrupts from the kernel.
1405 **/
1406 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
1407 {
1408 struct net_device *netdev = adapter->netdev;
1409 irqreturn_t (*handler)(int, void *);
1410 int i, vector, q_vectors, err;
1411 int ri=0, ti=0;
1412
1413 /* Decrement for Other and TCP Timer vectors */
1414 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1415
1416 /* Map the Tx/Rx rings to the vectors we were allotted. */
1417 err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
1418 if (err)
1419 goto out;
1420
1421 #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
1422 (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
1423 &ixgbe_msix_clean_many)
1424 for (vector = 0; vector < q_vectors; vector++) {
1425 handler = SET_HANDLER(adapter->q_vector[vector]);
1426
1427 if(handler == &ixgbe_msix_clean_rx) {
1428 sprintf(adapter->name[vector], "%s-%s-%d",
1429 netdev->name, "rx", ri++);
1430 }
1431 else if(handler == &ixgbe_msix_clean_tx) {
1432 sprintf(adapter->name[vector], "%s-%s-%d",
1433 netdev->name, "tx", ti++);
1434 }
1435 else
1436 sprintf(adapter->name[vector], "%s-%s-%d",
1437 netdev->name, "TxRx", vector);
1438
1439 err = request_irq(adapter->msix_entries[vector].vector,
1440 handler, 0, adapter->name[vector],
1441 adapter->q_vector[vector]);
1442 if (err) {
1443 DPRINTK(PROBE, ERR,
1444 "request_irq failed for MSIX interrupt "
1445 "Error: %d\n", err);
1446 goto free_queue_irqs;
1447 }
1448 }
1449
1450 sprintf(adapter->name[vector], "%s:lsc", netdev->name);
1451 err = request_irq(adapter->msix_entries[vector].vector,
1452 &ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
1453 if (err) {
1454 DPRINTK(PROBE, ERR,
1455 "request_irq for msix_lsc failed: %d\n", err);
1456 goto free_queue_irqs;
1457 }
1458
1459 return 0;
1460
1461 free_queue_irqs:
1462 for (i = vector - 1; i >= 0; i--)
1463 free_irq(adapter->msix_entries[--vector].vector,
1464 adapter->q_vector[i]);
1465 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
1466 pci_disable_msix(adapter->pdev);
1467 kfree(adapter->msix_entries);
1468 adapter->msix_entries = NULL;
1469 out:
1470 return err;
1471 }
1472
1473 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
1474 {
1475 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1476 u8 current_itr;
1477 u32 new_itr = q_vector->eitr;
1478 struct ixgbe_ring *rx_ring = &adapter->rx_ring[0];
1479 struct ixgbe_ring *tx_ring = &adapter->tx_ring[0];
1480
1481 q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
1482 q_vector->tx_itr,
1483 tx_ring->total_packets,
1484 tx_ring->total_bytes);
1485 q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
1486 q_vector->rx_itr,
1487 rx_ring->total_packets,
1488 rx_ring->total_bytes);
1489
1490 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1491
1492 switch (current_itr) {
1493 /* counts and packets in update_itr are dependent on these numbers */
1494 case lowest_latency:
1495 new_itr = 100000;
1496 break;
1497 case low_latency:
1498 new_itr = 20000; /* aka hwitr = ~200 */
1499 break;
1500 case bulk_latency:
1501 new_itr = 8000;
1502 break;
1503 default:
1504 break;
1505 }
1506
1507 if (new_itr != q_vector->eitr) {
1508 u32 itr_reg;
1509
1510 /* save the algorithm value here, not the smoothed one */
1511 q_vector->eitr = new_itr;
1512 /* do an exponential smoothing */
1513 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1514 itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr);
1515 ixgbe_write_eitr(adapter, 0, itr_reg);
1516 }
1517
1518 return;
1519 }
1520
1521 /**
1522 * ixgbe_irq_enable - Enable default interrupt generation settings
1523 * @adapter: board private structure
1524 **/
1525 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
1526 {
1527 u32 mask;
1528
1529 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
1530 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
1531 mask |= IXGBE_EIMS_GPI_SDP1;
1532 if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1533 mask |= IXGBE_EIMS_ECC;
1534 mask |= IXGBE_EIMS_GPI_SDP1;
1535 mask |= IXGBE_EIMS_GPI_SDP2;
1536 }
1537
1538 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1539 ixgbe_irq_enable_queues(adapter, ~0);
1540 IXGBE_WRITE_FLUSH(&adapter->hw);
1541 }
1542
1543 /**
1544 * ixgbe_intr - legacy mode Interrupt Handler
1545 * @irq: interrupt number
1546 * @data: pointer to a network interface device structure
1547 **/
1548 static irqreturn_t ixgbe_intr(int irq, void *data)
1549 {
1550 struct net_device *netdev = data;
1551 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1552 struct ixgbe_hw *hw = &adapter->hw;
1553 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1554 u32 eicr;
1555
1556 /*
1557 * Workaround for silicon errata. Mask the interrupts
1558 * before the read of EICR.
1559 */
1560 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
1561
1562 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
1563 * therefore no explict interrupt disable is necessary */
1564 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
1565 if (!eicr) {
1566 /* shared interrupt alert!
1567 * make sure interrupts are enabled because the read will
1568 * have disabled interrupts due to EIAM */
1569 ixgbe_irq_enable(adapter);
1570 return IRQ_NONE; /* Not our interrupt */
1571 }
1572
1573 if (eicr & IXGBE_EICR_LSC)
1574 ixgbe_check_lsc(adapter);
1575
1576 if (hw->mac.type == ixgbe_mac_82599EB)
1577 ixgbe_check_sfp_event(adapter, eicr);
1578
1579 ixgbe_check_fan_failure(adapter, eicr);
1580
1581 if (napi_schedule_prep(&(q_vector->napi))) {
1582 adapter->tx_ring[0].total_packets = 0;
1583 adapter->tx_ring[0].total_bytes = 0;
1584 adapter->rx_ring[0].total_packets = 0;
1585 adapter->rx_ring[0].total_bytes = 0;
1586 /* would disable interrupts here but EIAM disabled it */
1587 __napi_schedule(&(q_vector->napi));
1588 }
1589
1590 return IRQ_HANDLED;
1591 }
1592
1593 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
1594 {
1595 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1596
1597 for (i = 0; i < q_vectors; i++) {
1598 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
1599 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
1600 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
1601 q_vector->rxr_count = 0;
1602 q_vector->txr_count = 0;
1603 }
1604 }
1605
1606 /**
1607 * ixgbe_request_irq - initialize interrupts
1608 * @adapter: board private structure
1609 *
1610 * Attempts to configure interrupts using the best available
1611 * capabilities of the hardware and kernel.
1612 **/
1613 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
1614 {
1615 struct net_device *netdev = adapter->netdev;
1616 int err;
1617
1618 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1619 err = ixgbe_request_msix_irqs(adapter);
1620 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
1621 err = request_irq(adapter->pdev->irq, &ixgbe_intr, 0,
1622 netdev->name, netdev);
1623 } else {
1624 err = request_irq(adapter->pdev->irq, &ixgbe_intr, IRQF_SHARED,
1625 netdev->name, netdev);
1626 }
1627
1628 if (err)
1629 DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err);
1630
1631 return err;
1632 }
1633
1634 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
1635 {
1636 struct net_device *netdev = adapter->netdev;
1637
1638 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1639 int i, q_vectors;
1640
1641 q_vectors = adapter->num_msix_vectors;
1642
1643 i = q_vectors - 1;
1644 free_irq(adapter->msix_entries[i].vector, netdev);
1645
1646 i--;
1647 for (; i >= 0; i--) {
1648 free_irq(adapter->msix_entries[i].vector,
1649 adapter->q_vector[i]);
1650 }
1651
1652 ixgbe_reset_q_vectors(adapter);
1653 } else {
1654 free_irq(adapter->pdev->irq, netdev);
1655 }
1656 }
1657
1658 /**
1659 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
1660 * @adapter: board private structure
1661 **/
1662 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
1663 {
1664 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1665 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
1666 } else {
1667 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
1668 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
1669 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
1670 }
1671 IXGBE_WRITE_FLUSH(&adapter->hw);
1672 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1673 int i;
1674 for (i = 0; i < adapter->num_msix_vectors; i++)
1675 synchronize_irq(adapter->msix_entries[i].vector);
1676 } else {
1677 synchronize_irq(adapter->pdev->irq);
1678 }
1679 }
1680
1681 /**
1682 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
1683 *
1684 **/
1685 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
1686 {
1687 struct ixgbe_hw *hw = &adapter->hw;
1688
1689 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
1690 EITR_INTS_PER_SEC_TO_REG(adapter->eitr_param));
1691
1692 ixgbe_set_ivar(adapter, 0, 0, 0);
1693 ixgbe_set_ivar(adapter, 1, 0, 0);
1694
1695 map_vector_to_rxq(adapter, 0, 0);
1696 map_vector_to_txq(adapter, 0, 0);
1697
1698 DPRINTK(HW, INFO, "Legacy interrupt IVAR setup done\n");
1699 }
1700
1701 /**
1702 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
1703 * @adapter: board private structure
1704 *
1705 * Configure the Tx unit of the MAC after a reset.
1706 **/
1707 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
1708 {
1709 u64 tdba;
1710 struct ixgbe_hw *hw = &adapter->hw;
1711 u32 i, j, tdlen, txctrl;
1712
1713 /* Setup the HW Tx Head and Tail descriptor pointers */
1714 for (i = 0; i < adapter->num_tx_queues; i++) {
1715 struct ixgbe_ring *ring = &adapter->tx_ring[i];
1716 j = ring->reg_idx;
1717 tdba = ring->dma;
1718 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1719 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(j),
1720 (tdba & DMA_BIT_MASK(32)));
1721 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(j), (tdba >> 32));
1722 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(j), tdlen);
1723 IXGBE_WRITE_REG(hw, IXGBE_TDH(j), 0);
1724 IXGBE_WRITE_REG(hw, IXGBE_TDT(j), 0);
1725 adapter->tx_ring[i].head = IXGBE_TDH(j);
1726 adapter->tx_ring[i].tail = IXGBE_TDT(j);
1727 /* Disable Tx Head Writeback RO bit, since this hoses
1728 * bookkeeping if things aren't delivered in order.
1729 */
1730 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(j));
1731 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1732 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(j), txctrl);
1733 }
1734 if (hw->mac.type == ixgbe_mac_82599EB) {
1735 /* We enable 8 traffic classes, DCB only */
1736 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
1737 IXGBE_WRITE_REG(hw, IXGBE_MTQC, (IXGBE_MTQC_RT_ENA |
1738 IXGBE_MTQC_8TC_8TQ));
1739 }
1740 }
1741
1742 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1743
1744 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter, int index)
1745 {
1746 struct ixgbe_ring *rx_ring;
1747 u32 srrctl;
1748 int queue0 = 0;
1749 unsigned long mask;
1750 struct ixgbe_ring_feature *feature = adapter->ring_feature;
1751
1752 if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1753 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
1754 int dcb_i = feature[RING_F_DCB].indices;
1755 if (dcb_i == 8)
1756 queue0 = index >> 4;
1757 else if (dcb_i == 4)
1758 queue0 = index >> 5;
1759 else
1760 dev_err(&adapter->pdev->dev, "Invalid DCB "
1761 "configuration\n");
1762 #ifdef IXGBE_FCOE
1763 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
1764 struct ixgbe_ring_feature *f;
1765
1766 rx_ring = &adapter->rx_ring[queue0];
1767 f = &adapter->ring_feature[RING_F_FCOE];
1768 if ((queue0 == 0) && (index > rx_ring->reg_idx))
1769 queue0 = f->mask + index -
1770 rx_ring->reg_idx - 1;
1771 }
1772 #endif /* IXGBE_FCOE */
1773 } else {
1774 queue0 = index;
1775 }
1776 } else {
1777 mask = (unsigned long) feature[RING_F_RSS].mask;
1778 queue0 = index & mask;
1779 index = index & mask;
1780 }
1781
1782 rx_ring = &adapter->rx_ring[queue0];
1783
1784 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
1785
1786 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
1787 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
1788
1789 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
1790 IXGBE_SRRCTL_BSIZEHDR_MASK;
1791
1792 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1793 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
1794 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1795 #else
1796 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1797 #endif
1798 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1799 } else {
1800 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
1801 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1802 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1803 }
1804
1805 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
1806 }
1807
1808 static u32 ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
1809 {
1810 u32 mrqc = 0;
1811 int mask;
1812
1813 if (!(adapter->hw.mac.type == ixgbe_mac_82599EB))
1814 return mrqc;
1815
1816 mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
1817 #ifdef CONFIG_IXGBE_DCB
1818 | IXGBE_FLAG_DCB_ENABLED
1819 #endif
1820 );
1821
1822 switch (mask) {
1823 case (IXGBE_FLAG_RSS_ENABLED):
1824 mrqc = IXGBE_MRQC_RSSEN;
1825 break;
1826 #ifdef CONFIG_IXGBE_DCB
1827 case (IXGBE_FLAG_DCB_ENABLED):
1828 mrqc = IXGBE_MRQC_RT8TCEN;
1829 break;
1830 #endif /* CONFIG_IXGBE_DCB */
1831 default:
1832 break;
1833 }
1834
1835 return mrqc;
1836 }
1837
1838 /**
1839 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
1840 * @adapter: board private structure
1841 *
1842 * Configure the Rx unit of the MAC after a reset.
1843 **/
1844 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
1845 {
1846 u64 rdba;
1847 struct ixgbe_hw *hw = &adapter->hw;
1848 struct net_device *netdev = adapter->netdev;
1849 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1850 int i, j;
1851 u32 rdlen, rxctrl, rxcsum;
1852 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
1853 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
1854 0x6A3E67EA, 0x14364D17, 0x3BED200D};
1855 u32 fctrl, hlreg0;
1856 u32 reta = 0, mrqc = 0;
1857 u32 rdrxctl;
1858 u32 rscctrl;
1859 int rx_buf_len;
1860
1861 /* Decide whether to use packet split mode or not */
1862 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
1863
1864 #ifdef IXGBE_FCOE
1865 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
1866 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
1867 #endif /* IXGBE_FCOE */
1868
1869 /* Set the RX buffer length according to the mode */
1870 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1871 rx_buf_len = IXGBE_RX_HDR_SIZE;
1872 if (hw->mac.type == ixgbe_mac_82599EB) {
1873 /* PSRTYPE must be initialized in 82599 */
1874 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
1875 IXGBE_PSRTYPE_UDPHDR |
1876 IXGBE_PSRTYPE_IPV4HDR |
1877 IXGBE_PSRTYPE_IPV6HDR |
1878 IXGBE_PSRTYPE_L2HDR;
1879 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(0), psrtype);
1880 }
1881 } else {
1882 if (!(adapter->flags & IXGBE_FLAG_RSC_ENABLED) &&
1883 (netdev->mtu <= ETH_DATA_LEN))
1884 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1885 else
1886 rx_buf_len = ALIGN(max_frame, 1024);
1887 }
1888
1889 fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
1890 fctrl |= IXGBE_FCTRL_BAM;
1891 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
1892 fctrl |= IXGBE_FCTRL_PMCF;
1893 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
1894
1895 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
1896 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1897 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
1898 else
1899 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
1900 #ifdef IXGBE_FCOE
1901 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
1902 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
1903 #endif
1904 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
1905
1906 rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
1907 /* disable receives while setting up the descriptors */
1908 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1909 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
1910
1911 /*
1912 * Setup the HW Rx Head and Tail Descriptor Pointers and
1913 * the Base and Length of the Rx Descriptor Ring
1914 */
1915 for (i = 0; i < adapter->num_rx_queues; i++) {
1916 rdba = adapter->rx_ring[i].dma;
1917 j = adapter->rx_ring[i].reg_idx;
1918 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(j), (rdba & DMA_BIT_MASK(32)));
1919 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(j), (rdba >> 32));
1920 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(j), rdlen);
1921 IXGBE_WRITE_REG(hw, IXGBE_RDH(j), 0);
1922 IXGBE_WRITE_REG(hw, IXGBE_RDT(j), 0);
1923 adapter->rx_ring[i].head = IXGBE_RDH(j);
1924 adapter->rx_ring[i].tail = IXGBE_RDT(j);
1925 adapter->rx_ring[i].rx_buf_len = rx_buf_len;
1926
1927 #ifdef IXGBE_FCOE
1928 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
1929 struct ixgbe_ring_feature *f;
1930 f = &adapter->ring_feature[RING_F_FCOE];
1931 if ((rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
1932 (i >= f->mask) && (i < f->mask + f->indices))
1933 adapter->rx_ring[i].rx_buf_len =
1934 IXGBE_FCOE_JUMBO_FRAME_SIZE;
1935 }
1936
1937 #endif /* IXGBE_FCOE */
1938 ixgbe_configure_srrctl(adapter, j);
1939 }
1940
1941 if (hw->mac.type == ixgbe_mac_82598EB) {
1942 /*
1943 * For VMDq support of different descriptor types or
1944 * buffer sizes through the use of multiple SRRCTL
1945 * registers, RDRXCTL.MVMEN must be set to 1
1946 *
1947 * also, the manual doesn't mention it clearly but DCA hints
1948 * will only use queue 0's tags unless this bit is set. Side
1949 * effects of setting this bit are only that SRRCTL must be
1950 * fully programmed [0..15]
1951 */
1952 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
1953 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
1954 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
1955 }
1956
1957 /* Program MRQC for the distribution of queues */
1958 mrqc = ixgbe_setup_mrqc(adapter);
1959
1960 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
1961 /* Fill out redirection table */
1962 for (i = 0, j = 0; i < 128; i++, j++) {
1963 if (j == adapter->ring_feature[RING_F_RSS].indices)
1964 j = 0;
1965 /* reta = 4-byte sliding window of
1966 * 0x00..(indices-1)(indices-1)00..etc. */
1967 reta = (reta << 8) | (j * 0x11);
1968 if ((i & 3) == 3)
1969 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
1970 }
1971
1972 /* Fill out hash function seeds */
1973 for (i = 0; i < 10; i++)
1974 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
1975
1976 if (hw->mac.type == ixgbe_mac_82598EB)
1977 mrqc |= IXGBE_MRQC_RSSEN;
1978 /* Perform hash on these packet types */
1979 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
1980 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
1981 | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
1982 | IXGBE_MRQC_RSS_FIELD_IPV6
1983 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
1984 | IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
1985 }
1986 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
1987
1988 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
1989
1990 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED ||
1991 adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
1992 /* Disable indicating checksum in descriptor, enables
1993 * RSS hash */
1994 rxcsum |= IXGBE_RXCSUM_PCSD;
1995 }
1996 if (!(rxcsum & IXGBE_RXCSUM_PCSD)) {
1997 /* Enable IPv4 payload checksum for UDP fragments
1998 * if PCSD is not set */
1999 rxcsum |= IXGBE_RXCSUM_IPPCSE;
2000 }
2001
2002 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2003
2004 if (hw->mac.type == ixgbe_mac_82599EB) {
2005 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2006 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
2007 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
2008 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2009 }
2010
2011 if (adapter->flags & IXGBE_FLAG_RSC_ENABLED) {
2012 /* Enable 82599 HW-RSC */
2013 for (i = 0; i < adapter->num_rx_queues; i++) {
2014 j = adapter->rx_ring[i].reg_idx;
2015 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(j));
2016 rscctrl |= IXGBE_RSCCTL_RSCEN;
2017 /*
2018 * we must limit the number of descriptors so that the
2019 * total size of max desc * buf_len is not greater
2020 * than 65535
2021 */
2022 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
2023 #if (MAX_SKB_FRAGS > 16)
2024 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2025 #elif (MAX_SKB_FRAGS > 8)
2026 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2027 #elif (MAX_SKB_FRAGS > 4)
2028 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2029 #else
2030 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2031 #endif
2032 } else {
2033 if (rx_buf_len < IXGBE_RXBUFFER_4096)
2034 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2035 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
2036 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2037 else
2038 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2039 }
2040 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(j), rscctrl);
2041 }
2042 /* Disable RSC for ACK packets */
2043 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
2044 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
2045 }
2046 }
2047
2048 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2049 {
2050 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2051 struct ixgbe_hw *hw = &adapter->hw;
2052
2053 /* add VID to filter table */
2054 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, true);
2055 }
2056
2057 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2058 {
2059 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2060 struct ixgbe_hw *hw = &adapter->hw;
2061
2062 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2063 ixgbe_irq_disable(adapter);
2064
2065 vlan_group_set_device(adapter->vlgrp, vid, NULL);
2066
2067 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2068 ixgbe_irq_enable(adapter);
2069
2070 /* remove VID from filter table */
2071 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, false);
2072 }
2073
2074 static void ixgbe_vlan_rx_register(struct net_device *netdev,
2075 struct vlan_group *grp)
2076 {
2077 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2078 u32 ctrl;
2079 int i, j;
2080
2081 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2082 ixgbe_irq_disable(adapter);
2083 adapter->vlgrp = grp;
2084
2085 /*
2086 * For a DCB driver, always enable VLAN tag stripping so we can
2087 * still receive traffic from a DCB-enabled host even if we're
2088 * not in DCB mode.
2089 */
2090 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
2091 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2092 ctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2093 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
2094 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
2095 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
2096 ctrl |= IXGBE_VLNCTRL_VFE;
2097 /* enable VLAN tag insert/strip */
2098 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
2099 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
2100 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
2101 for (i = 0; i < adapter->num_rx_queues; i++) {
2102 j = adapter->rx_ring[i].reg_idx;
2103 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXDCTL(j));
2104 ctrl |= IXGBE_RXDCTL_VME;
2105 IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXDCTL(j), ctrl);
2106 }
2107 }
2108 ixgbe_vlan_rx_add_vid(netdev, 0);
2109
2110 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2111 ixgbe_irq_enable(adapter);
2112 }
2113
2114 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
2115 {
2116 ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2117
2118 if (adapter->vlgrp) {
2119 u16 vid;
2120 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2121 if (!vlan_group_get_device(adapter->vlgrp, vid))
2122 continue;
2123 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
2124 }
2125 }
2126 }
2127
2128 static u8 *ixgbe_addr_list_itr(struct ixgbe_hw *hw, u8 **mc_addr_ptr, u32 *vmdq)
2129 {
2130 struct dev_mc_list *mc_ptr;
2131 u8 *addr = *mc_addr_ptr;
2132 *vmdq = 0;
2133
2134 mc_ptr = container_of(addr, struct dev_mc_list, dmi_addr[0]);
2135 if (mc_ptr->next)
2136 *mc_addr_ptr = mc_ptr->next->dmi_addr;
2137 else
2138 *mc_addr_ptr = NULL;
2139
2140 return addr;
2141 }
2142
2143 /**
2144 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
2145 * @netdev: network interface device structure
2146 *
2147 * The set_rx_method entry point is called whenever the unicast/multicast
2148 * address list or the network interface flags are updated. This routine is
2149 * responsible for configuring the hardware for proper unicast, multicast and
2150 * promiscuous mode.
2151 **/
2152 static void ixgbe_set_rx_mode(struct net_device *netdev)
2153 {
2154 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2155 struct ixgbe_hw *hw = &adapter->hw;
2156 u32 fctrl, vlnctrl;
2157 u8 *addr_list = NULL;
2158 int addr_count = 0;
2159
2160 /* Check for Promiscuous and All Multicast modes */
2161
2162 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
2163 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2164
2165 if (netdev->flags & IFF_PROMISC) {
2166 hw->addr_ctrl.user_set_promisc = 1;
2167 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2168 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
2169 } else {
2170 if (netdev->flags & IFF_ALLMULTI) {
2171 fctrl |= IXGBE_FCTRL_MPE;
2172 fctrl &= ~IXGBE_FCTRL_UPE;
2173 } else {
2174 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2175 }
2176 vlnctrl |= IXGBE_VLNCTRL_VFE;
2177 hw->addr_ctrl.user_set_promisc = 0;
2178 }
2179
2180 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
2181 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2182
2183 /* reprogram secondary unicast list */
2184 hw->mac.ops.update_uc_addr_list(hw, &netdev->uc_list);
2185
2186 /* reprogram multicast list */
2187 addr_count = netdev->mc_count;
2188 if (addr_count)
2189 addr_list = netdev->mc_list->dmi_addr;
2190 hw->mac.ops.update_mc_addr_list(hw, addr_list, addr_count,
2191 ixgbe_addr_list_itr);
2192 }
2193
2194 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
2195 {
2196 int q_idx;
2197 struct ixgbe_q_vector *q_vector;
2198 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2199
2200 /* legacy and MSI only use one vector */
2201 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2202 q_vectors = 1;
2203
2204 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2205 struct napi_struct *napi;
2206 q_vector = adapter->q_vector[q_idx];
2207 if (!q_vector->rxr_count)
2208 continue;
2209 napi = &q_vector->napi;
2210 if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) &&
2211 (q_vector->rxr_count > 1))
2212 napi->poll = &ixgbe_clean_rxonly_many;
2213
2214 napi_enable(napi);
2215 }
2216 }
2217
2218 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
2219 {
2220 int q_idx;
2221 struct ixgbe_q_vector *q_vector;
2222 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2223
2224 /* legacy and MSI only use one vector */
2225 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2226 q_vectors = 1;
2227
2228 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2229 q_vector = adapter->q_vector[q_idx];
2230 if (!q_vector->rxr_count)
2231 continue;
2232 napi_disable(&q_vector->napi);
2233 }
2234 }
2235
2236 #ifdef CONFIG_IXGBE_DCB
2237 /*
2238 * ixgbe_configure_dcb - Configure DCB hardware
2239 * @adapter: ixgbe adapter struct
2240 *
2241 * This is called by the driver on open to configure the DCB hardware.
2242 * This is also called by the gennetlink interface when reconfiguring
2243 * the DCB state.
2244 */
2245 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
2246 {
2247 struct ixgbe_hw *hw = &adapter->hw;
2248 u32 txdctl, vlnctrl;
2249 int i, j;
2250
2251 ixgbe_dcb_check_config(&adapter->dcb_cfg);
2252 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_TX_CONFIG);
2253 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_RX_CONFIG);
2254
2255 /* reconfigure the hardware */
2256 ixgbe_dcb_hw_config(&adapter->hw, &adapter->dcb_cfg);
2257
2258 for (i = 0; i < adapter->num_tx_queues; i++) {
2259 j = adapter->tx_ring[i].reg_idx;
2260 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2261 /* PThresh workaround for Tx hang with DFP enabled. */
2262 txdctl |= 32;
2263 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2264 }
2265 /* Enable VLAN tag insert/strip */
2266 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2267 if (hw->mac.type == ixgbe_mac_82598EB) {
2268 vlnctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2269 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2270 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2271 } else if (hw->mac.type == ixgbe_mac_82599EB) {
2272 vlnctrl |= IXGBE_VLNCTRL_VFE;
2273 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2274 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2275 for (i = 0; i < adapter->num_rx_queues; i++) {
2276 j = adapter->rx_ring[i].reg_idx;
2277 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2278 vlnctrl |= IXGBE_RXDCTL_VME;
2279 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
2280 }
2281 }
2282 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
2283 }
2284
2285 #endif
2286 static void ixgbe_configure(struct ixgbe_adapter *adapter)
2287 {
2288 struct net_device *netdev = adapter->netdev;
2289 int i;
2290
2291 ixgbe_set_rx_mode(netdev);
2292
2293 ixgbe_restore_vlan(adapter);
2294 #ifdef CONFIG_IXGBE_DCB
2295 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2296 netif_set_gso_max_size(netdev, 32768);
2297 ixgbe_configure_dcb(adapter);
2298 } else {
2299 netif_set_gso_max_size(netdev, 65536);
2300 }
2301 #else
2302 netif_set_gso_max_size(netdev, 65536);
2303 #endif
2304
2305 #ifdef IXGBE_FCOE
2306 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
2307 ixgbe_configure_fcoe(adapter);
2308
2309 #endif /* IXGBE_FCOE */
2310 ixgbe_configure_tx(adapter);
2311 ixgbe_configure_rx(adapter);
2312 for (i = 0; i < adapter->num_rx_queues; i++)
2313 ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i],
2314 (adapter->rx_ring[i].count - 1));
2315 }
2316
2317 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
2318 {
2319 switch (hw->phy.type) {
2320 case ixgbe_phy_sfp_avago:
2321 case ixgbe_phy_sfp_ftl:
2322 case ixgbe_phy_sfp_intel:
2323 case ixgbe_phy_sfp_unknown:
2324 case ixgbe_phy_tw_tyco:
2325 case ixgbe_phy_tw_unknown:
2326 return true;
2327 default:
2328 return false;
2329 }
2330 }
2331
2332 /**
2333 * ixgbe_sfp_link_config - set up SFP+ link
2334 * @adapter: pointer to private adapter struct
2335 **/
2336 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
2337 {
2338 struct ixgbe_hw *hw = &adapter->hw;
2339
2340 if (hw->phy.multispeed_fiber) {
2341 /*
2342 * In multispeed fiber setups, the device may not have
2343 * had a physical connection when the driver loaded.
2344 * If that's the case, the initial link configuration
2345 * couldn't get the MAC into 10G or 1G mode, so we'll
2346 * never have a link status change interrupt fire.
2347 * We need to try and force an autonegotiation
2348 * session, then bring up link.
2349 */
2350 hw->mac.ops.setup_sfp(hw);
2351 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
2352 schedule_work(&adapter->multispeed_fiber_task);
2353 } else {
2354 /*
2355 * Direct Attach Cu and non-multispeed fiber modules
2356 * still need to be configured properly prior to
2357 * attempting link.
2358 */
2359 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_MOD_TASK))
2360 schedule_work(&adapter->sfp_config_module_task);
2361 }
2362 }
2363
2364 /**
2365 * ixgbe_non_sfp_link_config - set up non-SFP+ link
2366 * @hw: pointer to private hardware struct
2367 *
2368 * Returns 0 on success, negative on failure
2369 **/
2370 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
2371 {
2372 u32 autoneg;
2373 bool link_up = false;
2374 u32 ret = IXGBE_ERR_LINK_SETUP;
2375
2376 if (hw->mac.ops.check_link)
2377 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
2378
2379 if (ret)
2380 goto link_cfg_out;
2381
2382 if (hw->mac.ops.get_link_capabilities)
2383 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg,
2384 &hw->mac.autoneg);
2385 if (ret)
2386 goto link_cfg_out;
2387
2388 if (hw->mac.ops.setup_link_speed)
2389 ret = hw->mac.ops.setup_link_speed(hw, autoneg, true, link_up);
2390 link_cfg_out:
2391 return ret;
2392 }
2393
2394 #define IXGBE_MAX_RX_DESC_POLL 10
2395 static inline void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
2396 int rxr)
2397 {
2398 int j = adapter->rx_ring[rxr].reg_idx;
2399 int k;
2400
2401 for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) {
2402 if (IXGBE_READ_REG(&adapter->hw,
2403 IXGBE_RXDCTL(j)) & IXGBE_RXDCTL_ENABLE)
2404 break;
2405 else
2406 msleep(1);
2407 }
2408 if (k >= IXGBE_MAX_RX_DESC_POLL) {
2409 DPRINTK(DRV, ERR, "RXDCTL.ENABLE on Rx queue %d "
2410 "not set within the polling period\n", rxr);
2411 }
2412 ixgbe_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr],
2413 (adapter->rx_ring[rxr].count - 1));
2414 }
2415
2416 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
2417 {
2418 struct net_device *netdev = adapter->netdev;
2419 struct ixgbe_hw *hw = &adapter->hw;
2420 int i, j = 0;
2421 int num_rx_rings = adapter->num_rx_queues;
2422 int err;
2423 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2424 u32 txdctl, rxdctl, mhadd;
2425 u32 dmatxctl;
2426 u32 gpie;
2427
2428 ixgbe_get_hw_control(adapter);
2429
2430 if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) ||
2431 (adapter->flags & IXGBE_FLAG_MSI_ENABLED)) {
2432 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2433 gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
2434 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
2435 } else {
2436 /* MSI only */
2437 gpie = 0;
2438 }
2439 /* XXX: to interrupt immediately for EICS writes, enable this */
2440 /* gpie |= IXGBE_GPIE_EIMEN; */
2441 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2442 }
2443
2444 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
2445 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
2446 * specifically only auto mask tx and rx interrupts */
2447 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
2448 }
2449
2450 /* Enable fan failure interrupt if media type is copper */
2451 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2452 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2453 gpie |= IXGBE_SDP1_GPIEN;
2454 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2455 }
2456
2457 if (hw->mac.type == ixgbe_mac_82599EB) {
2458 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2459 gpie |= IXGBE_SDP1_GPIEN;
2460 gpie |= IXGBE_SDP2_GPIEN;
2461 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2462 }
2463
2464 #ifdef IXGBE_FCOE
2465 /* adjust max frame to be able to do baby jumbo for FCoE */
2466 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
2467 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
2468 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
2469
2470 #endif /* IXGBE_FCOE */
2471 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
2472 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
2473 mhadd &= ~IXGBE_MHADD_MFS_MASK;
2474 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
2475
2476 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
2477 }
2478
2479 for (i = 0; i < adapter->num_tx_queues; i++) {
2480 j = adapter->tx_ring[i].reg_idx;
2481 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2482 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
2483 txdctl |= (8 << 16);
2484 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2485 }
2486
2487 if (hw->mac.type == ixgbe_mac_82599EB) {
2488 /* DMATXCTL.EN must be set after all Tx queue config is done */
2489 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2490 dmatxctl |= IXGBE_DMATXCTL_TE;
2491 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2492 }
2493 for (i = 0; i < adapter->num_tx_queues; i++) {
2494 j = adapter->tx_ring[i].reg_idx;
2495 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2496 txdctl |= IXGBE_TXDCTL_ENABLE;
2497 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2498 }
2499
2500 for (i = 0; i < num_rx_rings; i++) {
2501 j = adapter->rx_ring[i].reg_idx;
2502 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2503 /* enable PTHRESH=32 descriptors (half the internal cache)
2504 * and HTHRESH=0 descriptors (to minimize latency on fetch),
2505 * this also removes a pesky rx_no_buffer_count increment */
2506 rxdctl |= 0x0020;
2507 rxdctl |= IXGBE_RXDCTL_ENABLE;
2508 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), rxdctl);
2509 if (hw->mac.type == ixgbe_mac_82599EB)
2510 ixgbe_rx_desc_queue_enable(adapter, i);
2511 }
2512 /* enable all receives */
2513 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2514 if (hw->mac.type == ixgbe_mac_82598EB)
2515 rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
2516 else
2517 rxdctl |= IXGBE_RXCTRL_RXEN;
2518 hw->mac.ops.enable_rx_dma(hw, rxdctl);
2519
2520 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2521 ixgbe_configure_msix(adapter);
2522 else
2523 ixgbe_configure_msi_and_legacy(adapter);
2524
2525 clear_bit(__IXGBE_DOWN, &adapter->state);
2526 ixgbe_napi_enable_all(adapter);
2527
2528 /* clear any pending interrupts, may auto mask */
2529 IXGBE_READ_REG(hw, IXGBE_EICR);
2530
2531 ixgbe_irq_enable(adapter);
2532
2533 /*
2534 * If this adapter has a fan, check to see if we had a failure
2535 * before we enabled the interrupt.
2536 */
2537 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2538 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
2539 if (esdp & IXGBE_ESDP_SDP1)
2540 DPRINTK(DRV, CRIT,
2541 "Fan has stopped, replace the adapter\n");
2542 }
2543
2544 /*
2545 * For hot-pluggable SFP+ devices, a new SFP+ module may have
2546 * arrived before interrupts were enabled. We need to kick off
2547 * the SFP+ module setup first, then try to bring up link.
2548 * If we're not hot-pluggable SFP+, we just need to configure link
2549 * and bring it up.
2550 */
2551 err = hw->phy.ops.identify(hw);
2552 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
2553 DPRINTK(PROBE, ERR, "PHY not supported on this NIC %d\n", err);
2554 ixgbe_down(adapter);
2555 return err;
2556 }
2557
2558 if (ixgbe_is_sfp(hw)) {
2559 ixgbe_sfp_link_config(adapter);
2560 } else {
2561 err = ixgbe_non_sfp_link_config(hw);
2562 if (err)
2563 DPRINTK(PROBE, ERR, "link_config FAILED %d\n", err);
2564 }
2565
2566 /* enable transmits */
2567 netif_tx_start_all_queues(netdev);
2568
2569 /* bring the link up in the watchdog, this could race with our first
2570 * link up interrupt but shouldn't be a problem */
2571 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2572 adapter->link_check_timeout = jiffies;
2573 mod_timer(&adapter->watchdog_timer, jiffies);
2574 return 0;
2575 }
2576
2577 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
2578 {
2579 WARN_ON(in_interrupt());
2580 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
2581 msleep(1);
2582 ixgbe_down(adapter);
2583 ixgbe_up(adapter);
2584 clear_bit(__IXGBE_RESETTING, &adapter->state);
2585 }
2586
2587 int ixgbe_up(struct ixgbe_adapter *adapter)
2588 {
2589 /* hardware has been reset, we need to reload some things */
2590 ixgbe_configure(adapter);
2591
2592 return ixgbe_up_complete(adapter);
2593 }
2594
2595 void ixgbe_reset(struct ixgbe_adapter *adapter)
2596 {
2597 struct ixgbe_hw *hw = &adapter->hw;
2598 int err;
2599
2600 err = hw->mac.ops.init_hw(hw);
2601 if (err && (err != IXGBE_ERR_SFP_NOT_PRESENT))
2602 dev_err(&adapter->pdev->dev, "Hardware Error\n");
2603
2604 /* reprogram the RAR[0] in case user changed it. */
2605 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
2606
2607 }
2608
2609 /**
2610 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
2611 * @adapter: board private structure
2612 * @rx_ring: ring to free buffers from
2613 **/
2614 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
2615 struct ixgbe_ring *rx_ring)
2616 {
2617 struct pci_dev *pdev = adapter->pdev;
2618 unsigned long size;
2619 unsigned int i;
2620
2621 /* Free all the Rx ring sk_buffs */
2622
2623 for (i = 0; i < rx_ring->count; i++) {
2624 struct ixgbe_rx_buffer *rx_buffer_info;
2625
2626 rx_buffer_info = &rx_ring->rx_buffer_info[i];
2627 if (rx_buffer_info->dma) {
2628 pci_unmap_single(pdev, rx_buffer_info->dma,
2629 rx_ring->rx_buf_len,
2630 PCI_DMA_FROMDEVICE);
2631 rx_buffer_info->dma = 0;
2632 }
2633 if (rx_buffer_info->skb) {
2634 struct sk_buff *skb = rx_buffer_info->skb;
2635 rx_buffer_info->skb = NULL;
2636 do {
2637 struct sk_buff *this = skb;
2638 skb = skb->prev;
2639 dev_kfree_skb(this);
2640 } while (skb);
2641 }
2642 if (!rx_buffer_info->page)
2643 continue;
2644 pci_unmap_page(pdev, rx_buffer_info->page_dma, PAGE_SIZE / 2,
2645 PCI_DMA_FROMDEVICE);
2646 rx_buffer_info->page_dma = 0;
2647 put_page(rx_buffer_info->page);
2648 rx_buffer_info->page = NULL;
2649 rx_buffer_info->page_offset = 0;
2650 }
2651
2652 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
2653 memset(rx_ring->rx_buffer_info, 0, size);
2654
2655 /* Zero out the descriptor ring */
2656 memset(rx_ring->desc, 0, rx_ring->size);
2657
2658 rx_ring->next_to_clean = 0;
2659 rx_ring->next_to_use = 0;
2660
2661 if (rx_ring->head)
2662 writel(0, adapter->hw.hw_addr + rx_ring->head);
2663 if (rx_ring->tail)
2664 writel(0, adapter->hw.hw_addr + rx_ring->tail);
2665 }
2666
2667 /**
2668 * ixgbe_clean_tx_ring - Free Tx Buffers
2669 * @adapter: board private structure
2670 * @tx_ring: ring to be cleaned
2671 **/
2672 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
2673 struct ixgbe_ring *tx_ring)
2674 {
2675 struct ixgbe_tx_buffer *tx_buffer_info;
2676 unsigned long size;
2677 unsigned int i;
2678
2679 /* Free all the Tx ring sk_buffs */
2680
2681 for (i = 0; i < tx_ring->count; i++) {
2682 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2683 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
2684 }
2685
2686 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
2687 memset(tx_ring->tx_buffer_info, 0, size);
2688
2689 /* Zero out the descriptor ring */
2690 memset(tx_ring->desc, 0, tx_ring->size);
2691
2692 tx_ring->next_to_use = 0;
2693 tx_ring->next_to_clean = 0;
2694
2695 if (tx_ring->head)
2696 writel(0, adapter->hw.hw_addr + tx_ring->head);
2697 if (tx_ring->tail)
2698 writel(0, adapter->hw.hw_addr + tx_ring->tail);
2699 }
2700
2701 /**
2702 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
2703 * @adapter: board private structure
2704 **/
2705 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
2706 {
2707 int i;
2708
2709 for (i = 0; i < adapter->num_rx_queues; i++)
2710 ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2711 }
2712
2713 /**
2714 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
2715 * @adapter: board private structure
2716 **/
2717 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
2718 {
2719 int i;
2720
2721 for (i = 0; i < adapter->num_tx_queues; i++)
2722 ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2723 }
2724
2725 void ixgbe_down(struct ixgbe_adapter *adapter)
2726 {
2727 struct net_device *netdev = adapter->netdev;
2728 struct ixgbe_hw *hw = &adapter->hw;
2729 u32 rxctrl;
2730 u32 txdctl;
2731 int i, j;
2732
2733 /* signal that we are down to the interrupt handler */
2734 set_bit(__IXGBE_DOWN, &adapter->state);
2735
2736 /* disable receives */
2737 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2738 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2739
2740 netif_tx_disable(netdev);
2741
2742 IXGBE_WRITE_FLUSH(hw);
2743 msleep(10);
2744
2745 netif_tx_stop_all_queues(netdev);
2746
2747 ixgbe_irq_disable(adapter);
2748
2749 ixgbe_napi_disable_all(adapter);
2750
2751 del_timer_sync(&adapter->watchdog_timer);
2752 cancel_work_sync(&adapter->watchdog_task);
2753
2754 /* disable transmits in the hardware now that interrupts are off */
2755 for (i = 0; i < adapter->num_tx_queues; i++) {
2756 j = adapter->tx_ring[i].reg_idx;
2757 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2758 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
2759 (txdctl & ~IXGBE_TXDCTL_ENABLE));
2760 }
2761 /* Disable the Tx DMA engine on 82599 */
2762 if (hw->mac.type == ixgbe_mac_82599EB)
2763 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
2764 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
2765 ~IXGBE_DMATXCTL_TE));
2766
2767 netif_carrier_off(netdev);
2768
2769 if (!pci_channel_offline(adapter->pdev))
2770 ixgbe_reset(adapter);
2771 ixgbe_clean_all_tx_rings(adapter);
2772 ixgbe_clean_all_rx_rings(adapter);
2773
2774 #ifdef CONFIG_IXGBE_DCA
2775 /* since we reset the hardware DCA settings were cleared */
2776 ixgbe_setup_dca(adapter);
2777 #endif
2778 }
2779
2780 /**
2781 * ixgbe_poll - NAPI Rx polling callback
2782 * @napi: structure for representing this polling device
2783 * @budget: how many packets driver is allowed to clean
2784 *
2785 * This function is used for legacy and MSI, NAPI mode
2786 **/
2787 static int ixgbe_poll(struct napi_struct *napi, int budget)
2788 {
2789 struct ixgbe_q_vector *q_vector =
2790 container_of(napi, struct ixgbe_q_vector, napi);
2791 struct ixgbe_adapter *adapter = q_vector->adapter;
2792 int tx_clean_complete, work_done = 0;
2793
2794 #ifdef CONFIG_IXGBE_DCA
2795 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
2796 ixgbe_update_tx_dca(adapter, adapter->tx_ring);
2797 ixgbe_update_rx_dca(adapter, adapter->rx_ring);
2798 }
2799 #endif
2800
2801 tx_clean_complete = ixgbe_clean_tx_irq(adapter, adapter->tx_ring);
2802 ixgbe_clean_rx_irq(q_vector, adapter->rx_ring, &work_done, budget);
2803
2804 if (!tx_clean_complete)
2805 work_done = budget;
2806
2807 /* If budget not fully consumed, exit the polling mode */
2808 if (work_done < budget) {
2809 napi_complete(napi);
2810 if (adapter->itr_setting & 1)
2811 ixgbe_set_itr(adapter);
2812 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2813 ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
2814 }
2815 return work_done;
2816 }
2817
2818 /**
2819 * ixgbe_tx_timeout - Respond to a Tx Hang
2820 * @netdev: network interface device structure
2821 **/
2822 static void ixgbe_tx_timeout(struct net_device *netdev)
2823 {
2824 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2825
2826 /* Do the reset outside of interrupt context */
2827 schedule_work(&adapter->reset_task);
2828 }
2829
2830 static void ixgbe_reset_task(struct work_struct *work)
2831 {
2832 struct ixgbe_adapter *adapter;
2833 adapter = container_of(work, struct ixgbe_adapter, reset_task);
2834
2835 /* If we're already down or resetting, just bail */
2836 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
2837 test_bit(__IXGBE_RESETTING, &adapter->state))
2838 return;
2839
2840 adapter->tx_timeout_count++;
2841
2842 ixgbe_reinit_locked(adapter);
2843 }
2844
2845 #ifdef CONFIG_IXGBE_DCB
2846 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
2847 {
2848 bool ret = false;
2849 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_DCB];
2850
2851 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
2852 return ret;
2853
2854 f->mask = 0x7 << 3;
2855 adapter->num_rx_queues = f->indices;
2856 adapter->num_tx_queues = f->indices;
2857 ret = true;
2858
2859 return ret;
2860 }
2861 #endif
2862
2863 /**
2864 * ixgbe_set_rss_queues: Allocate queues for RSS
2865 * @adapter: board private structure to initialize
2866 *
2867 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
2868 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
2869 *
2870 **/
2871 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
2872 {
2873 bool ret = false;
2874 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
2875
2876 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
2877 f->mask = 0xF;
2878 adapter->num_rx_queues = f->indices;
2879 adapter->num_tx_queues = f->indices;
2880 ret = true;
2881 } else {
2882 ret = false;
2883 }
2884
2885 return ret;
2886 }
2887
2888 #ifdef IXGBE_FCOE
2889 /**
2890 * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
2891 * @adapter: board private structure to initialize
2892 *
2893 * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
2894 * The ring feature mask is not used as a mask for FCoE, as it can take any 8
2895 * rx queues out of the max number of rx queues, instead, it is used as the
2896 * index of the first rx queue used by FCoE.
2897 *
2898 **/
2899 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
2900 {
2901 bool ret = false;
2902 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
2903
2904 f->indices = min((int)num_online_cpus(), f->indices);
2905 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
2906 #ifdef CONFIG_IXGBE_DCB
2907 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2908 DPRINTK(PROBE, INFO, "FCOE enabled with DCB \n");
2909 ixgbe_set_dcb_queues(adapter);
2910 }
2911 #endif
2912 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
2913 DPRINTK(PROBE, INFO, "FCOE enabled with RSS \n");
2914 ixgbe_set_rss_queues(adapter);
2915 }
2916 /* adding FCoE rx rings to the end */
2917 f->mask = adapter->num_rx_queues;
2918 adapter->num_rx_queues += f->indices;
2919 if (adapter->num_tx_queues == 0)
2920 adapter->num_tx_queues = f->indices;
2921
2922 ret = true;
2923 }
2924
2925 return ret;
2926 }
2927
2928 #endif /* IXGBE_FCOE */
2929 /*
2930 * ixgbe_set_num_queues: Allocate queues for device, feature dependant
2931 * @adapter: board private structure to initialize
2932 *
2933 * This is the top level queue allocation routine. The order here is very
2934 * important, starting with the "most" number of features turned on at once,
2935 * and ending with the smallest set of features. This way large combinations
2936 * can be allocated if they're turned on, and smaller combinations are the
2937 * fallthrough conditions.
2938 *
2939 **/
2940 static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
2941 {
2942 #ifdef IXGBE_FCOE
2943 if (ixgbe_set_fcoe_queues(adapter))
2944 goto done;
2945
2946 #endif /* IXGBE_FCOE */
2947 #ifdef CONFIG_IXGBE_DCB
2948 if (ixgbe_set_dcb_queues(adapter))
2949 goto done;
2950
2951 #endif
2952 if (ixgbe_set_rss_queues(adapter))
2953 goto done;
2954
2955 /* fallback to base case */
2956 adapter->num_rx_queues = 1;
2957 adapter->num_tx_queues = 1;
2958
2959 done:
2960 /* Notify the stack of the (possibly) reduced Tx Queue count. */
2961 adapter->netdev->real_num_tx_queues = adapter->num_tx_queues;
2962 }
2963
2964 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
2965 int vectors)
2966 {
2967 int err, vector_threshold;
2968
2969 /* We'll want at least 3 (vector_threshold):
2970 * 1) TxQ[0] Cleanup
2971 * 2) RxQ[0] Cleanup
2972 * 3) Other (Link Status Change, etc.)
2973 * 4) TCP Timer (optional)
2974 */
2975 vector_threshold = MIN_MSIX_COUNT;
2976
2977 /* The more we get, the more we will assign to Tx/Rx Cleanup
2978 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
2979 * Right now, we simply care about how many we'll get; we'll
2980 * set them up later while requesting irq's.
2981 */
2982 while (vectors >= vector_threshold) {
2983 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
2984 vectors);
2985 if (!err) /* Success in acquiring all requested vectors. */
2986 break;
2987 else if (err < 0)
2988 vectors = 0; /* Nasty failure, quit now */
2989 else /* err == number of vectors we should try again with */
2990 vectors = err;
2991 }
2992
2993 if (vectors < vector_threshold) {
2994 /* Can't allocate enough MSI-X interrupts? Oh well.
2995 * This just means we'll go with either a single MSI
2996 * vector or fall back to legacy interrupts.
2997 */
2998 DPRINTK(HW, DEBUG, "Unable to allocate MSI-X interrupts\n");
2999 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3000 kfree(adapter->msix_entries);
3001 adapter->msix_entries = NULL;
3002 } else {
3003 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
3004 /*
3005 * Adjust for only the vectors we'll use, which is minimum
3006 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
3007 * vectors we were allocated.
3008 */
3009 adapter->num_msix_vectors = min(vectors,
3010 adapter->max_msix_q_vectors + NON_Q_VECTORS);
3011 }
3012 }
3013
3014 /**
3015 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
3016 * @adapter: board private structure to initialize
3017 *
3018 * Cache the descriptor ring offsets for RSS to the assigned rings.
3019 *
3020 **/
3021 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
3022 {
3023 int i;
3024 bool ret = false;
3025
3026 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3027 for (i = 0; i < adapter->num_rx_queues; i++)
3028 adapter->rx_ring[i].reg_idx = i;
3029 for (i = 0; i < adapter->num_tx_queues; i++)
3030 adapter->tx_ring[i].reg_idx = i;
3031 ret = true;
3032 } else {
3033 ret = false;
3034 }
3035
3036 return ret;
3037 }
3038
3039 #ifdef CONFIG_IXGBE_DCB
3040 /**
3041 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
3042 * @adapter: board private structure to initialize
3043 *
3044 * Cache the descriptor ring offsets for DCB to the assigned rings.
3045 *
3046 **/
3047 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
3048 {
3049 int i;
3050 bool ret = false;
3051 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
3052
3053 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3054 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
3055 /* the number of queues is assumed to be symmetric */
3056 for (i = 0; i < dcb_i; i++) {
3057 adapter->rx_ring[i].reg_idx = i << 3;
3058 adapter->tx_ring[i].reg_idx = i << 2;
3059 }
3060 ret = true;
3061 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
3062 if (dcb_i == 8) {
3063 /*
3064 * Tx TC0 starts at: descriptor queue 0
3065 * Tx TC1 starts at: descriptor queue 32
3066 * Tx TC2 starts at: descriptor queue 64
3067 * Tx TC3 starts at: descriptor queue 80
3068 * Tx TC4 starts at: descriptor queue 96
3069 * Tx TC5 starts at: descriptor queue 104
3070 * Tx TC6 starts at: descriptor queue 112
3071 * Tx TC7 starts at: descriptor queue 120
3072 *
3073 * Rx TC0-TC7 are offset by 16 queues each
3074 */
3075 for (i = 0; i < 3; i++) {
3076 adapter->tx_ring[i].reg_idx = i << 5;
3077 adapter->rx_ring[i].reg_idx = i << 4;
3078 }
3079 for ( ; i < 5; i++) {
3080 adapter->tx_ring[i].reg_idx =
3081 ((i + 2) << 4);
3082 adapter->rx_ring[i].reg_idx = i << 4;
3083 }
3084 for ( ; i < dcb_i; i++) {
3085 adapter->tx_ring[i].reg_idx =
3086 ((i + 8) << 3);
3087 adapter->rx_ring[i].reg_idx = i << 4;
3088 }
3089
3090 ret = true;
3091 } else if (dcb_i == 4) {
3092 /*
3093 * Tx TC0 starts at: descriptor queue 0
3094 * Tx TC1 starts at: descriptor queue 64
3095 * Tx TC2 starts at: descriptor queue 96
3096 * Tx TC3 starts at: descriptor queue 112
3097 *
3098 * Rx TC0-TC3 are offset by 32 queues each
3099 */
3100 adapter->tx_ring[0].reg_idx = 0;
3101 adapter->tx_ring[1].reg_idx = 64;
3102 adapter->tx_ring[2].reg_idx = 96;
3103 adapter->tx_ring[3].reg_idx = 112;
3104 for (i = 0 ; i < dcb_i; i++)
3105 adapter->rx_ring[i].reg_idx = i << 5;
3106
3107 ret = true;
3108 } else {
3109 ret = false;
3110 }
3111 } else {
3112 ret = false;
3113 }
3114 } else {
3115 ret = false;
3116 }
3117
3118 return ret;
3119 }
3120 #endif
3121
3122 #ifdef IXGBE_FCOE
3123 /**
3124 * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
3125 * @adapter: board private structure to initialize
3126 *
3127 * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
3128 *
3129 */
3130 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
3131 {
3132 int i, fcoe_i = 0;
3133 bool ret = false;
3134 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3135
3136 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3137 #ifdef CONFIG_IXGBE_DCB
3138 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3139 ixgbe_cache_ring_dcb(adapter);
3140 fcoe_i = adapter->rx_ring[0].reg_idx + 1;
3141 }
3142 #endif /* CONFIG_IXGBE_DCB */
3143 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3144 ixgbe_cache_ring_rss(adapter);
3145 fcoe_i = f->mask;
3146 }
3147 for (i = 0; i < f->indices; i++, fcoe_i++)
3148 adapter->rx_ring[f->mask + i].reg_idx = fcoe_i;
3149 ret = true;
3150 }
3151 return ret;
3152 }
3153
3154 #endif /* IXGBE_FCOE */
3155 /**
3156 * ixgbe_cache_ring_register - Descriptor ring to register mapping
3157 * @adapter: board private structure to initialize
3158 *
3159 * Once we know the feature-set enabled for the device, we'll cache
3160 * the register offset the descriptor ring is assigned to.
3161 *
3162 * Note, the order the various feature calls is important. It must start with
3163 * the "most" features enabled at the same time, then trickle down to the
3164 * least amount of features turned on at once.
3165 **/
3166 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
3167 {
3168 /* start with default case */
3169 adapter->rx_ring[0].reg_idx = 0;
3170 adapter->tx_ring[0].reg_idx = 0;
3171
3172 #ifdef IXGBE_FCOE
3173 if (ixgbe_cache_ring_fcoe(adapter))
3174 return;
3175
3176 #endif /* IXGBE_FCOE */
3177 #ifdef CONFIG_IXGBE_DCB
3178 if (ixgbe_cache_ring_dcb(adapter))
3179 return;
3180
3181 #endif
3182 if (ixgbe_cache_ring_rss(adapter))
3183 return;
3184 }
3185
3186 /**
3187 * ixgbe_alloc_queues - Allocate memory for all rings
3188 * @adapter: board private structure to initialize
3189 *
3190 * We allocate one ring per queue at run-time since we don't know the
3191 * number of queues at compile-time. The polling_netdev array is
3192 * intended for Multiqueue, but should work fine with a single queue.
3193 **/
3194 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
3195 {
3196 int i;
3197
3198 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
3199 sizeof(struct ixgbe_ring), GFP_KERNEL);
3200 if (!adapter->tx_ring)
3201 goto err_tx_ring_allocation;
3202
3203 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
3204 sizeof(struct ixgbe_ring), GFP_KERNEL);
3205 if (!adapter->rx_ring)
3206 goto err_rx_ring_allocation;
3207
3208 for (i = 0; i < adapter->num_tx_queues; i++) {
3209 adapter->tx_ring[i].count = adapter->tx_ring_count;
3210 adapter->tx_ring[i].queue_index = i;
3211 }
3212
3213 for (i = 0; i < adapter->num_rx_queues; i++) {
3214 adapter->rx_ring[i].count = adapter->rx_ring_count;
3215 adapter->rx_ring[i].queue_index = i;
3216 }
3217
3218 ixgbe_cache_ring_register(adapter);
3219
3220 return 0;
3221
3222 err_rx_ring_allocation:
3223 kfree(adapter->tx_ring);
3224 err_tx_ring_allocation:
3225 return -ENOMEM;
3226 }
3227
3228 /**
3229 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
3230 * @adapter: board private structure to initialize
3231 *
3232 * Attempt to configure the interrupts using the best available
3233 * capabilities of the hardware and the kernel.
3234 **/
3235 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
3236 {
3237 struct ixgbe_hw *hw = &adapter->hw;
3238 int err = 0;
3239 int vector, v_budget;
3240
3241 /*
3242 * It's easy to be greedy for MSI-X vectors, but it really
3243 * doesn't do us much good if we have a lot more vectors
3244 * than CPU's. So let's be conservative and only ask for
3245 * (roughly) twice the number of vectors as there are CPU's.
3246 */
3247 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
3248 (int)(num_online_cpus() * 2)) + NON_Q_VECTORS;
3249
3250 /*
3251 * At the same time, hardware can only support a maximum of
3252 * hw.mac->max_msix_vectors vectors. With features
3253 * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
3254 * descriptor queues supported by our device. Thus, we cap it off in
3255 * those rare cases where the cpu count also exceeds our vector limit.
3256 */
3257 v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
3258
3259 /* A failure in MSI-X entry allocation isn't fatal, but it does
3260 * mean we disable MSI-X capabilities of the adapter. */
3261 adapter->msix_entries = kcalloc(v_budget,
3262 sizeof(struct msix_entry), GFP_KERNEL);
3263 if (adapter->msix_entries) {
3264 for (vector = 0; vector < v_budget; vector++)
3265 adapter->msix_entries[vector].entry = vector;
3266
3267 ixgbe_acquire_msix_vectors(adapter, v_budget);
3268
3269 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3270 goto out;
3271 }
3272
3273 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
3274 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
3275 ixgbe_set_num_queues(adapter);
3276
3277 err = pci_enable_msi(adapter->pdev);
3278 if (!err) {
3279 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
3280 } else {
3281 DPRINTK(HW, DEBUG, "Unable to allocate MSI interrupt, "
3282 "falling back to legacy. Error: %d\n", err);
3283 /* reset err */
3284 err = 0;
3285 }
3286
3287 out:
3288 return err;
3289 }
3290
3291 /**
3292 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
3293 * @adapter: board private structure to initialize
3294 *
3295 * We allocate one q_vector per queue interrupt. If allocation fails we
3296 * return -ENOMEM.
3297 **/
3298 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
3299 {
3300 int q_idx, num_q_vectors;
3301 struct ixgbe_q_vector *q_vector;
3302 int napi_vectors;
3303 int (*poll)(struct napi_struct *, int);
3304
3305 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3306 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3307 napi_vectors = adapter->num_rx_queues;
3308 poll = &ixgbe_clean_rxonly;
3309 } else {
3310 num_q_vectors = 1;
3311 napi_vectors = 1;
3312 poll = &ixgbe_poll;
3313 }
3314
3315 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3316 q_vector = kzalloc(sizeof(struct ixgbe_q_vector), GFP_KERNEL);
3317 if (!q_vector)
3318 goto err_out;
3319 q_vector->adapter = adapter;
3320 q_vector->v_idx = q_idx;
3321 q_vector->eitr = adapter->eitr_param;
3322 if (q_idx < napi_vectors)
3323 netif_napi_add(adapter->netdev, &q_vector->napi,
3324 (*poll), 64);
3325 adapter->q_vector[q_idx] = q_vector;
3326 }
3327
3328 return 0;
3329
3330 err_out:
3331 while (q_idx) {
3332 q_idx--;
3333 q_vector = adapter->q_vector[q_idx];
3334 netif_napi_del(&q_vector->napi);
3335 kfree(q_vector);
3336 adapter->q_vector[q_idx] = NULL;
3337 }
3338 return -ENOMEM;
3339 }
3340
3341 /**
3342 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
3343 * @adapter: board private structure to initialize
3344 *
3345 * This function frees the memory allocated to the q_vectors. In addition if
3346 * NAPI is enabled it will delete any references to the NAPI struct prior
3347 * to freeing the q_vector.
3348 **/
3349 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
3350 {
3351 int q_idx, num_q_vectors;
3352 int napi_vectors;
3353
3354 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3355 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3356 napi_vectors = adapter->num_rx_queues;
3357 } else {
3358 num_q_vectors = 1;
3359 napi_vectors = 1;
3360 }
3361
3362 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3363 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
3364
3365 adapter->q_vector[q_idx] = NULL;
3366 if (q_idx < napi_vectors)
3367 netif_napi_del(&q_vector->napi);
3368 kfree(q_vector);
3369 }
3370 }
3371
3372 void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
3373 {
3374 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3375 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3376 pci_disable_msix(adapter->pdev);
3377 kfree(adapter->msix_entries);
3378 adapter->msix_entries = NULL;
3379 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
3380 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
3381 pci_disable_msi(adapter->pdev);
3382 }
3383 return;
3384 }
3385
3386 /**
3387 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
3388 * @adapter: board private structure to initialize
3389 *
3390 * We determine which interrupt scheme to use based on...
3391 * - Kernel support (MSI, MSI-X)
3392 * - which can be user-defined (via MODULE_PARAM)
3393 * - Hardware queue count (num_*_queues)
3394 * - defined by miscellaneous hardware support/features (RSS, etc.)
3395 **/
3396 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
3397 {
3398 int err;
3399
3400 /* Number of supported queues */
3401 ixgbe_set_num_queues(adapter);
3402
3403 err = ixgbe_set_interrupt_capability(adapter);
3404 if (err) {
3405 DPRINTK(PROBE, ERR, "Unable to setup interrupt capabilities\n");
3406 goto err_set_interrupt;
3407 }
3408
3409 err = ixgbe_alloc_q_vectors(adapter);
3410 if (err) {
3411 DPRINTK(PROBE, ERR, "Unable to allocate memory for queue "
3412 "vectors\n");
3413 goto err_alloc_q_vectors;
3414 }
3415
3416 err = ixgbe_alloc_queues(adapter);
3417 if (err) {
3418 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
3419 goto err_alloc_queues;
3420 }
3421
3422 DPRINTK(DRV, INFO, "Multiqueue %s: Rx Queue count = %u, "
3423 "Tx Queue count = %u\n",
3424 (adapter->num_rx_queues > 1) ? "Enabled" :
3425 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
3426
3427 set_bit(__IXGBE_DOWN, &adapter->state);
3428
3429 return 0;
3430
3431 err_alloc_queues:
3432 ixgbe_free_q_vectors(adapter);
3433 err_alloc_q_vectors:
3434 ixgbe_reset_interrupt_capability(adapter);
3435 err_set_interrupt:
3436 return err;
3437 }
3438
3439 /**
3440 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
3441 * @adapter: board private structure to clear interrupt scheme on
3442 *
3443 * We go through and clear interrupt specific resources and reset the structure
3444 * to pre-load conditions
3445 **/
3446 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
3447 {
3448 kfree(adapter->tx_ring);
3449 kfree(adapter->rx_ring);
3450 adapter->tx_ring = NULL;
3451 adapter->rx_ring = NULL;
3452
3453 ixgbe_free_q_vectors(adapter);
3454 ixgbe_reset_interrupt_capability(adapter);
3455 }
3456
3457 /**
3458 * ixgbe_sfp_timer - worker thread to find a missing module
3459 * @data: pointer to our adapter struct
3460 **/
3461 static void ixgbe_sfp_timer(unsigned long data)
3462 {
3463 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
3464
3465 /*
3466 * Do the sfp_timer outside of interrupt context due to the
3467 * delays that sfp+ detection requires
3468 */
3469 schedule_work(&adapter->sfp_task);
3470 }
3471
3472 /**
3473 * ixgbe_sfp_task - worker thread to find a missing module
3474 * @work: pointer to work_struct containing our data
3475 **/
3476 static void ixgbe_sfp_task(struct work_struct *work)
3477 {
3478 struct ixgbe_adapter *adapter = container_of(work,
3479 struct ixgbe_adapter,
3480 sfp_task);
3481 struct ixgbe_hw *hw = &adapter->hw;
3482
3483 if ((hw->phy.type == ixgbe_phy_nl) &&
3484 (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
3485 s32 ret = hw->phy.ops.identify_sfp(hw);
3486 if (ret)
3487 goto reschedule;
3488 ret = hw->phy.ops.reset(hw);
3489 if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
3490 DPRINTK(PROBE, ERR, "failed to initialize because an "
3491 "unsupported SFP+ module type was detected.\n"
3492 "Reload the driver after installing a "
3493 "supported module.\n");
3494 unregister_netdev(adapter->netdev);
3495 } else {
3496 DPRINTK(PROBE, INFO, "detected SFP+: %d\n",
3497 hw->phy.sfp_type);
3498 }
3499 /* don't need this routine any more */
3500 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3501 }
3502 return;
3503 reschedule:
3504 if (test_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state))
3505 mod_timer(&adapter->sfp_timer,
3506 round_jiffies(jiffies + (2 * HZ)));
3507 }
3508
3509 /**
3510 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
3511 * @adapter: board private structure to initialize
3512 *
3513 * ixgbe_sw_init initializes the Adapter private data structure.
3514 * Fields are initialized based on PCI device information and
3515 * OS network device settings (MTU size).
3516 **/
3517 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
3518 {
3519 struct ixgbe_hw *hw = &adapter->hw;
3520 struct pci_dev *pdev = adapter->pdev;
3521 unsigned int rss;
3522 #ifdef CONFIG_IXGBE_DCB
3523 int j;
3524 struct tc_configuration *tc;
3525 #endif
3526
3527 /* PCI config space info */
3528
3529 hw->vendor_id = pdev->vendor;
3530 hw->device_id = pdev->device;
3531 hw->revision_id = pdev->revision;
3532 hw->subsystem_vendor_id = pdev->subsystem_vendor;
3533 hw->subsystem_device_id = pdev->subsystem_device;
3534
3535 /* Set capability flags */
3536 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
3537 adapter->ring_feature[RING_F_RSS].indices = rss;
3538 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
3539 adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
3540 if (hw->mac.type == ixgbe_mac_82598EB) {
3541 if (hw->device_id == IXGBE_DEV_ID_82598AT)
3542 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
3543 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
3544 } else if (hw->mac.type == ixgbe_mac_82599EB) {
3545 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
3546 adapter->flags |= IXGBE_FLAG_RSC_CAPABLE;
3547 adapter->flags |= IXGBE_FLAG_RSC_ENABLED;
3548 #ifdef IXGBE_FCOE
3549 adapter->flags |= IXGBE_FLAG_FCOE_ENABLED;
3550 adapter->ring_feature[RING_F_FCOE].indices = IXGBE_FCRETA_SIZE;
3551 #endif /* IXGBE_FCOE */
3552 }
3553
3554 #ifdef CONFIG_IXGBE_DCB
3555 /* Configure DCB traffic classes */
3556 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
3557 tc = &adapter->dcb_cfg.tc_config[j];
3558 tc->path[DCB_TX_CONFIG].bwg_id = 0;
3559 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
3560 tc->path[DCB_RX_CONFIG].bwg_id = 0;
3561 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
3562 tc->dcb_pfc = pfc_disabled;
3563 }
3564 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
3565 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
3566 adapter->dcb_cfg.rx_pba_cfg = pba_equal;
3567 adapter->dcb_cfg.pfc_mode_enable = false;
3568 adapter->dcb_cfg.round_robin_enable = false;
3569 adapter->dcb_set_bitmap = 0x00;
3570 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
3571 adapter->ring_feature[RING_F_DCB].indices);
3572
3573 #endif
3574
3575 /* default flow control settings */
3576 hw->fc.requested_mode = ixgbe_fc_full;
3577 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
3578 #ifdef CONFIG_DCB
3579 adapter->last_lfc_mode = hw->fc.current_mode;
3580 #endif
3581 hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
3582 hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
3583 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
3584 hw->fc.send_xon = true;
3585 hw->fc.disable_fc_autoneg = false;
3586
3587 /* enable itr by default in dynamic mode */
3588 adapter->itr_setting = 1;
3589 adapter->eitr_param = 20000;
3590
3591 /* set defaults for eitr in MegaBytes */
3592 adapter->eitr_low = 10;
3593 adapter->eitr_high = 20;
3594
3595 /* set default ring sizes */
3596 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
3597 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
3598
3599 /* initialize eeprom parameters */
3600 if (ixgbe_init_eeprom_params_generic(hw)) {
3601 dev_err(&pdev->dev, "EEPROM initialization failed\n");
3602 return -EIO;
3603 }
3604
3605 /* enable rx csum by default */
3606 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
3607
3608 set_bit(__IXGBE_DOWN, &adapter->state);
3609
3610 return 0;
3611 }
3612
3613 /**
3614 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
3615 * @adapter: board private structure
3616 * @tx_ring: tx descriptor ring (for a specific queue) to setup
3617 *
3618 * Return 0 on success, negative on failure
3619 **/
3620 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
3621 struct ixgbe_ring *tx_ring)
3622 {
3623 struct pci_dev *pdev = adapter->pdev;
3624 int size;
3625
3626 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
3627 tx_ring->tx_buffer_info = vmalloc(size);
3628 if (!tx_ring->tx_buffer_info)
3629 goto err;
3630 memset(tx_ring->tx_buffer_info, 0, size);
3631
3632 /* round up to nearest 4K */
3633 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
3634 tx_ring->size = ALIGN(tx_ring->size, 4096);
3635
3636 tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
3637 &tx_ring->dma);
3638 if (!tx_ring->desc)
3639 goto err;
3640
3641 tx_ring->next_to_use = 0;
3642 tx_ring->next_to_clean = 0;
3643 tx_ring->work_limit = tx_ring->count;
3644 return 0;
3645
3646 err:
3647 vfree(tx_ring->tx_buffer_info);
3648 tx_ring->tx_buffer_info = NULL;
3649 DPRINTK(PROBE, ERR, "Unable to allocate memory for the transmit "
3650 "descriptor ring\n");
3651 return -ENOMEM;
3652 }
3653
3654 /**
3655 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
3656 * @adapter: board private structure
3657 *
3658 * If this function returns with an error, then it's possible one or
3659 * more of the rings is populated (while the rest are not). It is the
3660 * callers duty to clean those orphaned rings.
3661 *
3662 * Return 0 on success, negative on failure
3663 **/
3664 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
3665 {
3666 int i, err = 0;
3667
3668 for (i = 0; i < adapter->num_tx_queues; i++) {
3669 err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]);
3670 if (!err)
3671 continue;
3672 DPRINTK(PROBE, ERR, "Allocation for Tx Queue %u failed\n", i);
3673 break;
3674 }
3675
3676 return err;
3677 }
3678
3679 /**
3680 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
3681 * @adapter: board private structure
3682 * @rx_ring: rx descriptor ring (for a specific queue) to setup
3683 *
3684 * Returns 0 on success, negative on failure
3685 **/
3686 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
3687 struct ixgbe_ring *rx_ring)
3688 {
3689 struct pci_dev *pdev = adapter->pdev;
3690 int size;
3691
3692 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
3693 rx_ring->rx_buffer_info = vmalloc(size);
3694 if (!rx_ring->rx_buffer_info) {
3695 DPRINTK(PROBE, ERR,
3696 "vmalloc allocation failed for the rx desc ring\n");
3697 goto alloc_failed;
3698 }
3699 memset(rx_ring->rx_buffer_info, 0, size);
3700
3701 /* Round up to nearest 4K */
3702 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
3703 rx_ring->size = ALIGN(rx_ring->size, 4096);
3704
3705 rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size, &rx_ring->dma);
3706
3707 if (!rx_ring->desc) {
3708 DPRINTK(PROBE, ERR,
3709 "Memory allocation failed for the rx desc ring\n");
3710 vfree(rx_ring->rx_buffer_info);
3711 goto alloc_failed;
3712 }
3713
3714 rx_ring->next_to_clean = 0;
3715 rx_ring->next_to_use = 0;
3716
3717 return 0;
3718
3719 alloc_failed:
3720 return -ENOMEM;
3721 }
3722
3723 /**
3724 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
3725 * @adapter: board private structure
3726 *
3727 * If this function returns with an error, then it's possible one or
3728 * more of the rings is populated (while the rest are not). It is the
3729 * callers duty to clean those orphaned rings.
3730 *
3731 * Return 0 on success, negative on failure
3732 **/
3733
3734 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
3735 {
3736 int i, err = 0;
3737
3738 for (i = 0; i < adapter->num_rx_queues; i++) {
3739 err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]);
3740 if (!err)
3741 continue;
3742 DPRINTK(PROBE, ERR, "Allocation for Rx Queue %u failed\n", i);
3743 break;
3744 }
3745
3746 return err;
3747 }
3748
3749 /**
3750 * ixgbe_free_tx_resources - Free Tx Resources per Queue
3751 * @adapter: board private structure
3752 * @tx_ring: Tx descriptor ring for a specific queue
3753 *
3754 * Free all transmit software resources
3755 **/
3756 void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
3757 struct ixgbe_ring *tx_ring)
3758 {
3759 struct pci_dev *pdev = adapter->pdev;
3760
3761 ixgbe_clean_tx_ring(adapter, tx_ring);
3762
3763 vfree(tx_ring->tx_buffer_info);
3764 tx_ring->tx_buffer_info = NULL;
3765
3766 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
3767
3768 tx_ring->desc = NULL;
3769 }
3770
3771 /**
3772 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
3773 * @adapter: board private structure
3774 *
3775 * Free all transmit software resources
3776 **/
3777 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
3778 {
3779 int i;
3780
3781 for (i = 0; i < adapter->num_tx_queues; i++)
3782 if (adapter->tx_ring[i].desc)
3783 ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
3784 }
3785
3786 /**
3787 * ixgbe_free_rx_resources - Free Rx Resources
3788 * @adapter: board private structure
3789 * @rx_ring: ring to clean the resources from
3790 *
3791 * Free all receive software resources
3792 **/
3793 void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
3794 struct ixgbe_ring *rx_ring)
3795 {
3796 struct pci_dev *pdev = adapter->pdev;
3797
3798 ixgbe_clean_rx_ring(adapter, rx_ring);
3799
3800 vfree(rx_ring->rx_buffer_info);
3801 rx_ring->rx_buffer_info = NULL;
3802
3803 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
3804
3805 rx_ring->desc = NULL;
3806 }
3807
3808 /**
3809 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
3810 * @adapter: board private structure
3811 *
3812 * Free all receive software resources
3813 **/
3814 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
3815 {
3816 int i;
3817
3818 for (i = 0; i < adapter->num_rx_queues; i++)
3819 if (adapter->rx_ring[i].desc)
3820 ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
3821 }
3822
3823 /**
3824 * ixgbe_change_mtu - Change the Maximum Transfer Unit
3825 * @netdev: network interface device structure
3826 * @new_mtu: new value for maximum frame size
3827 *
3828 * Returns 0 on success, negative on failure
3829 **/
3830 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
3831 {
3832 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3833 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3834
3835 /* MTU < 68 is an error and causes problems on some kernels */
3836 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
3837 return -EINVAL;
3838
3839 DPRINTK(PROBE, INFO, "changing MTU from %d to %d\n",
3840 netdev->mtu, new_mtu);
3841 /* must set new MTU before calling down or up */
3842 netdev->mtu = new_mtu;
3843
3844 if (netif_running(netdev))
3845 ixgbe_reinit_locked(adapter);
3846
3847 return 0;
3848 }
3849
3850 /**
3851 * ixgbe_open - Called when a network interface is made active
3852 * @netdev: network interface device structure
3853 *
3854 * Returns 0 on success, negative value on failure
3855 *
3856 * The open entry point is called when a network interface is made
3857 * active by the system (IFF_UP). At this point all resources needed
3858 * for transmit and receive operations are allocated, the interrupt
3859 * handler is registered with the OS, the watchdog timer is started,
3860 * and the stack is notified that the interface is ready.
3861 **/
3862 static int ixgbe_open(struct net_device *netdev)
3863 {
3864 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3865 int err;
3866
3867 /* disallow open during test */
3868 if (test_bit(__IXGBE_TESTING, &adapter->state))
3869 return -EBUSY;
3870
3871 netif_carrier_off(netdev);
3872
3873 /* allocate transmit descriptors */
3874 err = ixgbe_setup_all_tx_resources(adapter);
3875 if (err)
3876 goto err_setup_tx;
3877
3878 /* allocate receive descriptors */
3879 err = ixgbe_setup_all_rx_resources(adapter);
3880 if (err)
3881 goto err_setup_rx;
3882
3883 ixgbe_configure(adapter);
3884
3885 err = ixgbe_request_irq(adapter);
3886 if (err)
3887 goto err_req_irq;
3888
3889 err = ixgbe_up_complete(adapter);
3890 if (err)
3891 goto err_up;
3892
3893 netif_tx_start_all_queues(netdev);
3894
3895 return 0;
3896
3897 err_up:
3898 ixgbe_release_hw_control(adapter);
3899 ixgbe_free_irq(adapter);
3900 err_req_irq:
3901 err_setup_rx:
3902 ixgbe_free_all_rx_resources(adapter);
3903 err_setup_tx:
3904 ixgbe_free_all_tx_resources(adapter);
3905 ixgbe_reset(adapter);
3906
3907 return err;
3908 }
3909
3910 /**
3911 * ixgbe_close - Disables a network interface
3912 * @netdev: network interface device structure
3913 *
3914 * Returns 0, this is not allowed to fail
3915 *
3916 * The close entry point is called when an interface is de-activated
3917 * by the OS. The hardware is still under the drivers control, but
3918 * needs to be disabled. A global MAC reset is issued to stop the
3919 * hardware, and all transmit and receive resources are freed.
3920 **/
3921 static int ixgbe_close(struct net_device *netdev)
3922 {
3923 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3924
3925 ixgbe_down(adapter);
3926 ixgbe_free_irq(adapter);
3927
3928 ixgbe_free_all_tx_resources(adapter);
3929 ixgbe_free_all_rx_resources(adapter);
3930
3931 ixgbe_release_hw_control(adapter);
3932
3933 return 0;
3934 }
3935
3936 #ifdef CONFIG_PM
3937 static int ixgbe_resume(struct pci_dev *pdev)
3938 {
3939 struct net_device *netdev = pci_get_drvdata(pdev);
3940 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3941 u32 err;
3942
3943 pci_set_power_state(pdev, PCI_D0);
3944 pci_restore_state(pdev);
3945
3946 err = pci_enable_device_mem(pdev);
3947 if (err) {
3948 printk(KERN_ERR "ixgbe: Cannot enable PCI device from "
3949 "suspend\n");
3950 return err;
3951 }
3952 pci_set_master(pdev);
3953
3954 pci_wake_from_d3(pdev, false);
3955
3956 err = ixgbe_init_interrupt_scheme(adapter);
3957 if (err) {
3958 printk(KERN_ERR "ixgbe: Cannot initialize interrupts for "
3959 "device\n");
3960 return err;
3961 }
3962
3963 ixgbe_reset(adapter);
3964
3965 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
3966
3967 if (netif_running(netdev)) {
3968 err = ixgbe_open(adapter->netdev);
3969 if (err)
3970 return err;
3971 }
3972
3973 netif_device_attach(netdev);
3974
3975 return 0;
3976 }
3977 #endif /* CONFIG_PM */
3978
3979 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
3980 {
3981 struct net_device *netdev = pci_get_drvdata(pdev);
3982 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3983 struct ixgbe_hw *hw = &adapter->hw;
3984 u32 ctrl, fctrl;
3985 u32 wufc = adapter->wol;
3986 #ifdef CONFIG_PM
3987 int retval = 0;
3988 #endif
3989
3990 netif_device_detach(netdev);
3991
3992 if (netif_running(netdev)) {
3993 ixgbe_down(adapter);
3994 ixgbe_free_irq(adapter);
3995 ixgbe_free_all_tx_resources(adapter);
3996 ixgbe_free_all_rx_resources(adapter);
3997 }
3998 ixgbe_clear_interrupt_scheme(adapter);
3999
4000 #ifdef CONFIG_PM
4001 retval = pci_save_state(pdev);
4002 if (retval)
4003 return retval;
4004
4005 #endif
4006 if (wufc) {
4007 ixgbe_set_rx_mode(netdev);
4008
4009 /* turn on all-multi mode if wake on multicast is enabled */
4010 if (wufc & IXGBE_WUFC_MC) {
4011 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4012 fctrl |= IXGBE_FCTRL_MPE;
4013 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
4014 }
4015
4016 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
4017 ctrl |= IXGBE_CTRL_GIO_DIS;
4018 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
4019
4020 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
4021 } else {
4022 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
4023 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
4024 }
4025
4026 if (wufc && hw->mac.type == ixgbe_mac_82599EB)
4027 pci_wake_from_d3(pdev, true);
4028 else
4029 pci_wake_from_d3(pdev, false);
4030
4031 *enable_wake = !!wufc;
4032
4033 ixgbe_release_hw_control(adapter);
4034
4035 pci_disable_device(pdev);
4036
4037 return 0;
4038 }
4039
4040 #ifdef CONFIG_PM
4041 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
4042 {
4043 int retval;
4044 bool wake;
4045
4046 retval = __ixgbe_shutdown(pdev, &wake);
4047 if (retval)
4048 return retval;
4049
4050 if (wake) {
4051 pci_prepare_to_sleep(pdev);
4052 } else {
4053 pci_wake_from_d3(pdev, false);
4054 pci_set_power_state(pdev, PCI_D3hot);
4055 }
4056
4057 return 0;
4058 }
4059 #endif /* CONFIG_PM */
4060
4061 static void ixgbe_shutdown(struct pci_dev *pdev)
4062 {
4063 bool wake;
4064
4065 __ixgbe_shutdown(pdev, &wake);
4066
4067 if (system_state == SYSTEM_POWER_OFF) {
4068 pci_wake_from_d3(pdev, wake);
4069 pci_set_power_state(pdev, PCI_D3hot);
4070 }
4071 }
4072
4073 /**
4074 * ixgbe_update_stats - Update the board statistics counters.
4075 * @adapter: board private structure
4076 **/
4077 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
4078 {
4079 struct ixgbe_hw *hw = &adapter->hw;
4080 u64 total_mpc = 0;
4081 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
4082
4083 if (hw->mac.type == ixgbe_mac_82599EB) {
4084 u64 rsc_count = 0;
4085 for (i = 0; i < 16; i++)
4086 adapter->hw_rx_no_dma_resources +=
4087 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4088 for (i = 0; i < adapter->num_rx_queues; i++)
4089 rsc_count += adapter->rx_ring[i].rsc_count;
4090 adapter->rsc_count = rsc_count;
4091 }
4092
4093 adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
4094 for (i = 0; i < 8; i++) {
4095 /* for packet buffers not used, the register should read 0 */
4096 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
4097 missed_rx += mpc;
4098 adapter->stats.mpc[i] += mpc;
4099 total_mpc += adapter->stats.mpc[i];
4100 if (hw->mac.type == ixgbe_mac_82598EB)
4101 adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
4102 adapter->stats.qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
4103 adapter->stats.qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
4104 adapter->stats.qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
4105 adapter->stats.qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
4106 if (hw->mac.type == ixgbe_mac_82599EB) {
4107 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4108 IXGBE_PXONRXCNT(i));
4109 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4110 IXGBE_PXOFFRXCNT(i));
4111 adapter->stats.qprdc[i] += IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4112 } else {
4113 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4114 IXGBE_PXONRXC(i));
4115 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4116 IXGBE_PXOFFRXC(i));
4117 }
4118 adapter->stats.pxontxc[i] += IXGBE_READ_REG(hw,
4119 IXGBE_PXONTXC(i));
4120 adapter->stats.pxofftxc[i] += IXGBE_READ_REG(hw,
4121 IXGBE_PXOFFTXC(i));
4122 }
4123 adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
4124 /* work around hardware counting issue */
4125 adapter->stats.gprc -= missed_rx;
4126
4127 /* 82598 hardware only has a 32 bit counter in the high register */
4128 if (hw->mac.type == ixgbe_mac_82599EB) {
4129 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
4130 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
4131 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
4132 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
4133 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORL);
4134 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
4135 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
4136 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
4137 #ifdef IXGBE_FCOE
4138 adapter->stats.fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
4139 adapter->stats.fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
4140 adapter->stats.fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
4141 adapter->stats.fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
4142 adapter->stats.fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
4143 adapter->stats.fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
4144 #endif /* IXGBE_FCOE */
4145 } else {
4146 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
4147 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
4148 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
4149 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
4150 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
4151 }
4152 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
4153 adapter->stats.bprc += bprc;
4154 adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
4155 if (hw->mac.type == ixgbe_mac_82598EB)
4156 adapter->stats.mprc -= bprc;
4157 adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
4158 adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
4159 adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
4160 adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
4161 adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
4162 adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
4163 adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
4164 adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
4165 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
4166 adapter->stats.lxontxc += lxon;
4167 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
4168 adapter->stats.lxofftxc += lxoff;
4169 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4170 adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
4171 adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
4172 /*
4173 * 82598 errata - tx of flow control packets is included in tx counters
4174 */
4175 xon_off_tot = lxon + lxoff;
4176 adapter->stats.gptc -= xon_off_tot;
4177 adapter->stats.mptc -= xon_off_tot;
4178 adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
4179 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4180 adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
4181 adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
4182 adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
4183 adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
4184 adapter->stats.ptc64 -= xon_off_tot;
4185 adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
4186 adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
4187 adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
4188 adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
4189 adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
4190 adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
4191
4192 /* Fill out the OS statistics structure */
4193 adapter->net_stats.multicast = adapter->stats.mprc;
4194
4195 /* Rx Errors */
4196 adapter->net_stats.rx_errors = adapter->stats.crcerrs +
4197 adapter->stats.rlec;
4198 adapter->net_stats.rx_dropped = 0;
4199 adapter->net_stats.rx_length_errors = adapter->stats.rlec;
4200 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
4201 adapter->net_stats.rx_missed_errors = total_mpc;
4202 }
4203
4204 /**
4205 * ixgbe_watchdog - Timer Call-back
4206 * @data: pointer to adapter cast into an unsigned long
4207 **/
4208 static void ixgbe_watchdog(unsigned long data)
4209 {
4210 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4211 struct ixgbe_hw *hw = &adapter->hw;
4212
4213 /* Do the watchdog outside of interrupt context due to the lovely
4214 * delays that some of the newer hardware requires */
4215 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
4216 u64 eics = 0;
4217 int i;
4218
4219 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++)
4220 eics |= ((u64)1 << i);
4221
4222 /* Cause software interrupt to ensure rx rings are cleaned */
4223 switch (hw->mac.type) {
4224 case ixgbe_mac_82598EB:
4225 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4226 IXGBE_WRITE_REG(hw, IXGBE_EICS, (u32)eics);
4227 } else {
4228 /*
4229 * for legacy and MSI interrupts don't set any
4230 * bits that are enabled for EIAM, because this
4231 * operation would set *both* EIMS and EICS for
4232 * any bit in EIAM
4233 */
4234 IXGBE_WRITE_REG(hw, IXGBE_EICS,
4235 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
4236 }
4237 break;
4238 case ixgbe_mac_82599EB:
4239 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4240 IXGBE_WRITE_REG(hw, IXGBE_EICS_EX(0),
4241 (u32)(eics & 0xFFFFFFFF));
4242 IXGBE_WRITE_REG(hw, IXGBE_EICS_EX(1),
4243 (u32)(eics >> 32));
4244 } else {
4245 /*
4246 * for legacy and MSI interrupts don't set any
4247 * bits that are enabled for EIAM, because this
4248 * operation would set *both* EIMS and EICS for
4249 * any bit in EIAM
4250 */
4251 IXGBE_WRITE_REG(hw, IXGBE_EICS,
4252 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
4253 }
4254 break;
4255 default:
4256 break;
4257 }
4258 /* Reset the timer */
4259 mod_timer(&adapter->watchdog_timer,
4260 round_jiffies(jiffies + 2 * HZ));
4261 }
4262
4263 schedule_work(&adapter->watchdog_task);
4264 }
4265
4266 /**
4267 * ixgbe_multispeed_fiber_task - worker thread to configure multispeed fiber
4268 * @work: pointer to work_struct containing our data
4269 **/
4270 static void ixgbe_multispeed_fiber_task(struct work_struct *work)
4271 {
4272 struct ixgbe_adapter *adapter = container_of(work,
4273 struct ixgbe_adapter,
4274 multispeed_fiber_task);
4275 struct ixgbe_hw *hw = &adapter->hw;
4276 u32 autoneg;
4277
4278 adapter->flags |= IXGBE_FLAG_IN_SFP_LINK_TASK;
4279 if (hw->mac.ops.get_link_capabilities)
4280 hw->mac.ops.get_link_capabilities(hw, &autoneg,
4281 &hw->mac.autoneg);
4282 if (hw->mac.ops.setup_link_speed)
4283 hw->mac.ops.setup_link_speed(hw, autoneg, true, true);
4284 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
4285 adapter->flags &= ~IXGBE_FLAG_IN_SFP_LINK_TASK;
4286 }
4287
4288 /**
4289 * ixgbe_sfp_config_module_task - worker thread to configure a new SFP+ module
4290 * @work: pointer to work_struct containing our data
4291 **/
4292 static void ixgbe_sfp_config_module_task(struct work_struct *work)
4293 {
4294 struct ixgbe_adapter *adapter = container_of(work,
4295 struct ixgbe_adapter,
4296 sfp_config_module_task);
4297 struct ixgbe_hw *hw = &adapter->hw;
4298 u32 err;
4299
4300 adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
4301 err = hw->phy.ops.identify_sfp(hw);
4302 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
4303 DPRINTK(PROBE, ERR, "PHY not supported on this NIC %d\n", err);
4304 ixgbe_down(adapter);
4305 return;
4306 }
4307 hw->mac.ops.setup_sfp(hw);
4308
4309 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
4310 /* This will also work for DA Twinax connections */
4311 schedule_work(&adapter->multispeed_fiber_task);
4312 adapter->flags &= ~IXGBE_FLAG_IN_SFP_MOD_TASK;
4313 }
4314
4315 /**
4316 * ixgbe_watchdog_task - worker thread to bring link up
4317 * @work: pointer to work_struct containing our data
4318 **/
4319 static void ixgbe_watchdog_task(struct work_struct *work)
4320 {
4321 struct ixgbe_adapter *adapter = container_of(work,
4322 struct ixgbe_adapter,
4323 watchdog_task);
4324 struct net_device *netdev = adapter->netdev;
4325 struct ixgbe_hw *hw = &adapter->hw;
4326 u32 link_speed = adapter->link_speed;
4327 bool link_up = adapter->link_up;
4328 int i;
4329 struct ixgbe_ring *tx_ring;
4330 int some_tx_pending = 0;
4331
4332 adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
4333
4334 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
4335 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
4336 if (link_up) {
4337 #ifdef CONFIG_DCB
4338 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4339 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
4340 hw->mac.ops.setup_fc(hw, i);
4341 } else {
4342 hw->mac.ops.setup_fc(hw, 0);
4343 }
4344 #else
4345 hw->mac.ops.setup_fc(hw, 0);
4346 #endif
4347 }
4348
4349 if (link_up ||
4350 time_after(jiffies, (adapter->link_check_timeout +
4351 IXGBE_TRY_LINK_TIMEOUT))) {
4352 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
4353 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
4354 }
4355 adapter->link_up = link_up;
4356 adapter->link_speed = link_speed;
4357 }
4358
4359 if (link_up) {
4360 if (!netif_carrier_ok(netdev)) {
4361 bool flow_rx, flow_tx;
4362
4363 if (hw->mac.type == ixgbe_mac_82599EB) {
4364 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
4365 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
4366 flow_rx = (mflcn & IXGBE_MFLCN_RFCE);
4367 flow_tx = (fccfg & IXGBE_FCCFG_TFCE_802_3X);
4368 } else {
4369 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4370 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
4371 flow_rx = (frctl & IXGBE_FCTRL_RFCE);
4372 flow_tx = (rmcs & IXGBE_RMCS_TFCE_802_3X);
4373 }
4374
4375 printk(KERN_INFO "ixgbe: %s NIC Link is Up %s, "
4376 "Flow Control: %s\n",
4377 netdev->name,
4378 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
4379 "10 Gbps" :
4380 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
4381 "1 Gbps" : "unknown speed")),
4382 ((flow_rx && flow_tx) ? "RX/TX" :
4383 (flow_rx ? "RX" :
4384 (flow_tx ? "TX" : "None"))));
4385
4386 netif_carrier_on(netdev);
4387 } else {
4388 /* Force detection of hung controller */
4389 adapter->detect_tx_hung = true;
4390 }
4391 } else {
4392 adapter->link_up = false;
4393 adapter->link_speed = 0;
4394 if (netif_carrier_ok(netdev)) {
4395 printk(KERN_INFO "ixgbe: %s NIC Link is Down\n",
4396 netdev->name);
4397 netif_carrier_off(netdev);
4398 }
4399 }
4400
4401 if (!netif_carrier_ok(netdev)) {
4402 for (i = 0; i < adapter->num_tx_queues; i++) {
4403 tx_ring = &adapter->tx_ring[i];
4404 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
4405 some_tx_pending = 1;
4406 break;
4407 }
4408 }
4409
4410 if (some_tx_pending) {
4411 /* We've lost link, so the controller stops DMA,
4412 * but we've got queued Tx work that's never going
4413 * to get done, so reset controller to flush Tx.
4414 * (Do the reset outside of interrupt context).
4415 */
4416 schedule_work(&adapter->reset_task);
4417 }
4418 }
4419
4420 ixgbe_update_stats(adapter);
4421 adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
4422 }
4423
4424 static int ixgbe_tso(struct ixgbe_adapter *adapter,
4425 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
4426 u32 tx_flags, u8 *hdr_len)
4427 {
4428 struct ixgbe_adv_tx_context_desc *context_desc;
4429 unsigned int i;
4430 int err;
4431 struct ixgbe_tx_buffer *tx_buffer_info;
4432 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
4433 u32 mss_l4len_idx, l4len;
4434
4435 if (skb_is_gso(skb)) {
4436 if (skb_header_cloned(skb)) {
4437 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
4438 if (err)
4439 return err;
4440 }
4441 l4len = tcp_hdrlen(skb);
4442 *hdr_len += l4len;
4443
4444 if (skb->protocol == htons(ETH_P_IP)) {
4445 struct iphdr *iph = ip_hdr(skb);
4446 iph->tot_len = 0;
4447 iph->check = 0;
4448 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
4449 iph->daddr, 0,
4450 IPPROTO_TCP,
4451 0);
4452 adapter->hw_tso_ctxt++;
4453 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
4454 ipv6_hdr(skb)->payload_len = 0;
4455 tcp_hdr(skb)->check =
4456 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
4457 &ipv6_hdr(skb)->daddr,
4458 0, IPPROTO_TCP, 0);
4459 adapter->hw_tso6_ctxt++;
4460 }
4461
4462 i = tx_ring->next_to_use;
4463
4464 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4465 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4466
4467 /* VLAN MACLEN IPLEN */
4468 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4469 vlan_macip_lens |=
4470 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4471 vlan_macip_lens |= ((skb_network_offset(skb)) <<
4472 IXGBE_ADVTXD_MACLEN_SHIFT);
4473 *hdr_len += skb_network_offset(skb);
4474 vlan_macip_lens |=
4475 (skb_transport_header(skb) - skb_network_header(skb));
4476 *hdr_len +=
4477 (skb_transport_header(skb) - skb_network_header(skb));
4478 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4479 context_desc->seqnum_seed = 0;
4480
4481 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
4482 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
4483 IXGBE_ADVTXD_DTYP_CTXT);
4484
4485 if (skb->protocol == htons(ETH_P_IP))
4486 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4487 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
4488 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4489
4490 /* MSS L4LEN IDX */
4491 mss_l4len_idx =
4492 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
4493 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
4494 /* use index 1 for TSO */
4495 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4496 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
4497
4498 tx_buffer_info->time_stamp = jiffies;
4499 tx_buffer_info->next_to_watch = i;
4500
4501 i++;
4502 if (i == tx_ring->count)
4503 i = 0;
4504 tx_ring->next_to_use = i;
4505
4506 return true;
4507 }
4508 return false;
4509 }
4510
4511 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
4512 struct ixgbe_ring *tx_ring,
4513 struct sk_buff *skb, u32 tx_flags)
4514 {
4515 struct ixgbe_adv_tx_context_desc *context_desc;
4516 unsigned int i;
4517 struct ixgbe_tx_buffer *tx_buffer_info;
4518 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
4519
4520 if (skb->ip_summed == CHECKSUM_PARTIAL ||
4521 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
4522 i = tx_ring->next_to_use;
4523 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4524 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4525
4526 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4527 vlan_macip_lens |=
4528 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4529 vlan_macip_lens |= (skb_network_offset(skb) <<
4530 IXGBE_ADVTXD_MACLEN_SHIFT);
4531 if (skb->ip_summed == CHECKSUM_PARTIAL)
4532 vlan_macip_lens |= (skb_transport_header(skb) -
4533 skb_network_header(skb));
4534
4535 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4536 context_desc->seqnum_seed = 0;
4537
4538 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
4539 IXGBE_ADVTXD_DTYP_CTXT);
4540
4541 if (skb->ip_summed == CHECKSUM_PARTIAL) {
4542 switch (skb->protocol) {
4543 case cpu_to_be16(ETH_P_IP):
4544 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4545 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
4546 type_tucmd_mlhl |=
4547 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4548 else if (ip_hdr(skb)->protocol == IPPROTO_SCTP)
4549 type_tucmd_mlhl |=
4550 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4551 break;
4552 case cpu_to_be16(ETH_P_IPV6):
4553 /* XXX what about other V6 headers?? */
4554 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
4555 type_tucmd_mlhl |=
4556 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4557 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_SCTP)
4558 type_tucmd_mlhl |=
4559 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4560 break;
4561 default:
4562 if (unlikely(net_ratelimit())) {
4563 DPRINTK(PROBE, WARNING,
4564 "partial checksum but proto=%x!\n",
4565 skb->protocol);
4566 }
4567 break;
4568 }
4569 }
4570
4571 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4572 /* use index zero for tx checksum offload */
4573 context_desc->mss_l4len_idx = 0;
4574
4575 tx_buffer_info->time_stamp = jiffies;
4576 tx_buffer_info->next_to_watch = i;
4577
4578 adapter->hw_csum_tx_good++;
4579 i++;
4580 if (i == tx_ring->count)
4581 i = 0;
4582 tx_ring->next_to_use = i;
4583
4584 return true;
4585 }
4586
4587 return false;
4588 }
4589
4590 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
4591 struct ixgbe_ring *tx_ring,
4592 struct sk_buff *skb, u32 tx_flags,
4593 unsigned int first)
4594 {
4595 struct ixgbe_tx_buffer *tx_buffer_info;
4596 unsigned int len;
4597 unsigned int total = skb->len;
4598 unsigned int offset = 0, size, count = 0, i;
4599 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
4600 unsigned int f;
4601 dma_addr_t *map;
4602
4603 i = tx_ring->next_to_use;
4604
4605 if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
4606 dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
4607 return 0;
4608 }
4609
4610 map = skb_shinfo(skb)->dma_maps;
4611
4612 if (tx_flags & IXGBE_TX_FLAGS_FCOE)
4613 /* excluding fcoe_crc_eof for FCoE */
4614 total -= sizeof(struct fcoe_crc_eof);
4615
4616 len = min(skb_headlen(skb), total);
4617 while (len) {
4618 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4619 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
4620
4621 tx_buffer_info->length = size;
4622 tx_buffer_info->dma = map[0] + offset;
4623 tx_buffer_info->time_stamp = jiffies;
4624 tx_buffer_info->next_to_watch = i;
4625
4626 len -= size;
4627 total -= size;
4628 offset += size;
4629 count++;
4630
4631 if (len) {
4632 i++;
4633 if (i == tx_ring->count)
4634 i = 0;
4635 }
4636 }
4637
4638 for (f = 0; f < nr_frags; f++) {
4639 struct skb_frag_struct *frag;
4640
4641 frag = &skb_shinfo(skb)->frags[f];
4642 len = min((unsigned int)frag->size, total);
4643 offset = 0;
4644
4645 while (len) {
4646 i++;
4647 if (i == tx_ring->count)
4648 i = 0;
4649
4650 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4651 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
4652
4653 tx_buffer_info->length = size;
4654 tx_buffer_info->dma = map[f + 1] + offset;
4655 tx_buffer_info->time_stamp = jiffies;
4656 tx_buffer_info->next_to_watch = i;
4657
4658 len -= size;
4659 total -= size;
4660 offset += size;
4661 count++;
4662 }
4663 if (total == 0)
4664 break;
4665 }
4666
4667 tx_ring->tx_buffer_info[i].skb = skb;
4668 tx_ring->tx_buffer_info[first].next_to_watch = i;
4669
4670 return count;
4671 }
4672
4673 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
4674 struct ixgbe_ring *tx_ring,
4675 int tx_flags, int count, u32 paylen, u8 hdr_len)
4676 {
4677 union ixgbe_adv_tx_desc *tx_desc = NULL;
4678 struct ixgbe_tx_buffer *tx_buffer_info;
4679 u32 olinfo_status = 0, cmd_type_len = 0;
4680 unsigned int i;
4681 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
4682
4683 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
4684
4685 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
4686
4687 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4688 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
4689
4690 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
4691 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
4692
4693 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
4694 IXGBE_ADVTXD_POPTS_SHIFT;
4695
4696 /* use index 1 context for tso */
4697 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4698 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
4699 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
4700 IXGBE_ADVTXD_POPTS_SHIFT;
4701
4702 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
4703 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
4704 IXGBE_ADVTXD_POPTS_SHIFT;
4705
4706 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
4707 olinfo_status |= IXGBE_ADVTXD_CC;
4708 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4709 if (tx_flags & IXGBE_TX_FLAGS_FSO)
4710 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
4711 }
4712
4713 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
4714
4715 i = tx_ring->next_to_use;
4716 while (count--) {
4717 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4718 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
4719 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
4720 tx_desc->read.cmd_type_len =
4721 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
4722 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
4723 i++;
4724 if (i == tx_ring->count)
4725 i = 0;
4726 }
4727
4728 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
4729
4730 /*
4731 * Force memory writes to complete before letting h/w
4732 * know there are new descriptors to fetch. (Only
4733 * applicable for weak-ordered memory model archs,
4734 * such as IA-64).
4735 */
4736 wmb();
4737
4738 tx_ring->next_to_use = i;
4739 writel(i, adapter->hw.hw_addr + tx_ring->tail);
4740 }
4741
4742 static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
4743 struct ixgbe_ring *tx_ring, int size)
4744 {
4745 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4746
4747 netif_stop_subqueue(netdev, tx_ring->queue_index);
4748 /* Herbert's original patch had:
4749 * smp_mb__after_netif_stop_queue();
4750 * but since that doesn't exist yet, just open code it. */
4751 smp_mb();
4752
4753 /* We need to check again in a case another CPU has just
4754 * made room available. */
4755 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
4756 return -EBUSY;
4757
4758 /* A reprieve! - use start_queue because it doesn't call schedule */
4759 netif_start_subqueue(netdev, tx_ring->queue_index);
4760 ++adapter->restart_queue;
4761 return 0;
4762 }
4763
4764 static int ixgbe_maybe_stop_tx(struct net_device *netdev,
4765 struct ixgbe_ring *tx_ring, int size)
4766 {
4767 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
4768 return 0;
4769 return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
4770 }
4771
4772 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
4773 {
4774 struct ixgbe_adapter *adapter = netdev_priv(dev);
4775
4776 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
4777 return 0; /* All traffic should default to class 0 */
4778
4779 return skb_tx_hash(dev, skb);
4780 }
4781
4782 static int ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
4783 {
4784 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4785 struct ixgbe_ring *tx_ring;
4786 unsigned int first;
4787 unsigned int tx_flags = 0;
4788 u8 hdr_len = 0;
4789 int r_idx = 0, tso;
4790 int count = 0;
4791 unsigned int f;
4792
4793 r_idx = skb->queue_mapping;
4794 tx_ring = &adapter->tx_ring[r_idx];
4795
4796 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
4797 tx_flags |= vlan_tx_tag_get(skb);
4798 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4799 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
4800 tx_flags |= (skb->queue_mapping << 13);
4801 }
4802 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
4803 tx_flags |= IXGBE_TX_FLAGS_VLAN;
4804 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4805 tx_flags |= (skb->queue_mapping << 13);
4806 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
4807 tx_flags |= IXGBE_TX_FLAGS_VLAN;
4808 }
4809
4810 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
4811 (skb->protocol == htons(ETH_P_FCOE)))
4812 tx_flags |= IXGBE_TX_FLAGS_FCOE;
4813
4814 /* four things can cause us to need a context descriptor */
4815 if (skb_is_gso(skb) ||
4816 (skb->ip_summed == CHECKSUM_PARTIAL) ||
4817 (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
4818 (tx_flags & IXGBE_TX_FLAGS_FCOE))
4819 count++;
4820
4821 count += TXD_USE_COUNT(skb_headlen(skb));
4822 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
4823 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
4824
4825 if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
4826 adapter->tx_busy++;
4827 return NETDEV_TX_BUSY;
4828 }
4829
4830 first = tx_ring->next_to_use;
4831 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
4832 #ifdef IXGBE_FCOE
4833 /* setup tx offload for FCoE */
4834 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
4835 if (tso < 0) {
4836 dev_kfree_skb_any(skb);
4837 return NETDEV_TX_OK;
4838 }
4839 if (tso)
4840 tx_flags |= IXGBE_TX_FLAGS_FSO;
4841 #endif /* IXGBE_FCOE */
4842 } else {
4843 if (skb->protocol == htons(ETH_P_IP))
4844 tx_flags |= IXGBE_TX_FLAGS_IPV4;
4845 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
4846 if (tso < 0) {
4847 dev_kfree_skb_any(skb);
4848 return NETDEV_TX_OK;
4849 }
4850
4851 if (tso)
4852 tx_flags |= IXGBE_TX_FLAGS_TSO;
4853 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
4854 (skb->ip_summed == CHECKSUM_PARTIAL))
4855 tx_flags |= IXGBE_TX_FLAGS_CSUM;
4856 }
4857
4858 count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first);
4859 if (count) {
4860 ixgbe_tx_queue(adapter, tx_ring, tx_flags, count, skb->len,
4861 hdr_len);
4862 ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
4863
4864 } else {
4865 dev_kfree_skb_any(skb);
4866 tx_ring->tx_buffer_info[first].time_stamp = 0;
4867 tx_ring->next_to_use = first;
4868 }
4869
4870 return NETDEV_TX_OK;
4871 }
4872
4873 /**
4874 * ixgbe_get_stats - Get System Network Statistics
4875 * @netdev: network interface device structure
4876 *
4877 * Returns the address of the device statistics structure.
4878 * The statistics are actually updated from the timer callback.
4879 **/
4880 static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
4881 {
4882 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4883
4884 /* only return the current stats */
4885 return &adapter->net_stats;
4886 }
4887
4888 /**
4889 * ixgbe_set_mac - Change the Ethernet Address of the NIC
4890 * @netdev: network interface device structure
4891 * @p: pointer to an address structure
4892 *
4893 * Returns 0 on success, negative on failure
4894 **/
4895 static int ixgbe_set_mac(struct net_device *netdev, void *p)
4896 {
4897 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4898 struct ixgbe_hw *hw = &adapter->hw;
4899 struct sockaddr *addr = p;
4900
4901 if (!is_valid_ether_addr(addr->sa_data))
4902 return -EADDRNOTAVAIL;
4903
4904 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
4905 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
4906
4907 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
4908
4909 return 0;
4910 }
4911
4912 static int
4913 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
4914 {
4915 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4916 struct ixgbe_hw *hw = &adapter->hw;
4917 u16 value;
4918 int rc;
4919
4920 if (prtad != hw->phy.mdio.prtad)
4921 return -EINVAL;
4922 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
4923 if (!rc)
4924 rc = value;
4925 return rc;
4926 }
4927
4928 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
4929 u16 addr, u16 value)
4930 {
4931 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4932 struct ixgbe_hw *hw = &adapter->hw;
4933
4934 if (prtad != hw->phy.mdio.prtad)
4935 return -EINVAL;
4936 return hw->phy.ops.write_reg(hw, addr, devad, value);
4937 }
4938
4939 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
4940 {
4941 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4942
4943 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
4944 }
4945
4946 /**
4947 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
4948 * netdev->dev_addr_list
4949 * @netdev: network interface device structure
4950 *
4951 * Returns non-zero on failure
4952 **/
4953 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
4954 {
4955 int err = 0;
4956 struct ixgbe_adapter *adapter = netdev_priv(dev);
4957 struct ixgbe_mac_info *mac = &adapter->hw.mac;
4958
4959 if (is_valid_ether_addr(mac->san_addr)) {
4960 rtnl_lock();
4961 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
4962 rtnl_unlock();
4963 }
4964 return err;
4965 }
4966
4967 /**
4968 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
4969 * netdev->dev_addr_list
4970 * @netdev: network interface device structure
4971 *
4972 * Returns non-zero on failure
4973 **/
4974 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
4975 {
4976 int err = 0;
4977 struct ixgbe_adapter *adapter = netdev_priv(dev);
4978 struct ixgbe_mac_info *mac = &adapter->hw.mac;
4979
4980 if (is_valid_ether_addr(mac->san_addr)) {
4981 rtnl_lock();
4982 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
4983 rtnl_unlock();
4984 }
4985 return err;
4986 }
4987
4988 #ifdef CONFIG_NET_POLL_CONTROLLER
4989 /*
4990 * Polling 'interrupt' - used by things like netconsole to send skbs
4991 * without having to re-enable interrupts. It's not called while
4992 * the interrupt routine is executing.
4993 */
4994 static void ixgbe_netpoll(struct net_device *netdev)
4995 {
4996 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4997
4998 disable_irq(adapter->pdev->irq);
4999 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
5000 ixgbe_intr(adapter->pdev->irq, netdev);
5001 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
5002 enable_irq(adapter->pdev->irq);
5003 }
5004 #endif
5005
5006 static const struct net_device_ops ixgbe_netdev_ops = {
5007 .ndo_open = ixgbe_open,
5008 .ndo_stop = ixgbe_close,
5009 .ndo_start_xmit = ixgbe_xmit_frame,
5010 .ndo_select_queue = ixgbe_select_queue,
5011 .ndo_get_stats = ixgbe_get_stats,
5012 .ndo_set_rx_mode = ixgbe_set_rx_mode,
5013 .ndo_set_multicast_list = ixgbe_set_rx_mode,
5014 .ndo_validate_addr = eth_validate_addr,
5015 .ndo_set_mac_address = ixgbe_set_mac,
5016 .ndo_change_mtu = ixgbe_change_mtu,
5017 .ndo_tx_timeout = ixgbe_tx_timeout,
5018 .ndo_vlan_rx_register = ixgbe_vlan_rx_register,
5019 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
5020 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
5021 .ndo_do_ioctl = ixgbe_ioctl,
5022 #ifdef CONFIG_NET_POLL_CONTROLLER
5023 .ndo_poll_controller = ixgbe_netpoll,
5024 #endif
5025 #ifdef IXGBE_FCOE
5026 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
5027 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
5028 #endif /* IXGBE_FCOE */
5029 };
5030
5031 /**
5032 * ixgbe_probe - Device Initialization Routine
5033 * @pdev: PCI device information struct
5034 * @ent: entry in ixgbe_pci_tbl
5035 *
5036 * Returns 0 on success, negative on failure
5037 *
5038 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
5039 * The OS initialization, configuring of the adapter private structure,
5040 * and a hardware reset occur.
5041 **/
5042 static int __devinit ixgbe_probe(struct pci_dev *pdev,
5043 const struct pci_device_id *ent)
5044 {
5045 struct net_device *netdev;
5046 struct ixgbe_adapter *adapter = NULL;
5047 struct ixgbe_hw *hw;
5048 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
5049 static int cards_found;
5050 int i, err, pci_using_dac;
5051 #ifdef IXGBE_FCOE
5052 u16 device_caps;
5053 #endif
5054 u32 part_num, eec;
5055
5056 err = pci_enable_device_mem(pdev);
5057 if (err)
5058 return err;
5059
5060 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) &&
5061 !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
5062 pci_using_dac = 1;
5063 } else {
5064 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5065 if (err) {
5066 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5067 if (err) {
5068 dev_err(&pdev->dev, "No usable DMA "
5069 "configuration, aborting\n");
5070 goto err_dma;
5071 }
5072 }
5073 pci_using_dac = 0;
5074 }
5075
5076 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
5077 IORESOURCE_MEM), ixgbe_driver_name);
5078 if (err) {
5079 dev_err(&pdev->dev,
5080 "pci_request_selected_regions failed 0x%x\n", err);
5081 goto err_pci_reg;
5082 }
5083
5084 err = pci_enable_pcie_error_reporting(pdev);
5085 if (err) {
5086 dev_err(&pdev->dev, "pci_enable_pcie_error_reporting failed "
5087 "0x%x\n", err);
5088 /* non-fatal, continue */
5089 }
5090
5091 pci_set_master(pdev);
5092 pci_save_state(pdev);
5093
5094 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES);
5095 if (!netdev) {
5096 err = -ENOMEM;
5097 goto err_alloc_etherdev;
5098 }
5099
5100 SET_NETDEV_DEV(netdev, &pdev->dev);
5101
5102 pci_set_drvdata(pdev, netdev);
5103 adapter = netdev_priv(netdev);
5104
5105 adapter->netdev = netdev;
5106 adapter->pdev = pdev;
5107 hw = &adapter->hw;
5108 hw->back = adapter;
5109 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
5110
5111 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
5112 pci_resource_len(pdev, 0));
5113 if (!hw->hw_addr) {
5114 err = -EIO;
5115 goto err_ioremap;
5116 }
5117
5118 for (i = 1; i <= 5; i++) {
5119 if (pci_resource_len(pdev, i) == 0)
5120 continue;
5121 }
5122
5123 netdev->netdev_ops = &ixgbe_netdev_ops;
5124 ixgbe_set_ethtool_ops(netdev);
5125 netdev->watchdog_timeo = 5 * HZ;
5126 strcpy(netdev->name, pci_name(pdev));
5127
5128 adapter->bd_number = cards_found;
5129
5130 /* Setup hw api */
5131 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
5132 hw->mac.type = ii->mac;
5133
5134 /* EEPROM */
5135 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
5136 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
5137 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
5138 if (!(eec & (1 << 8)))
5139 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
5140
5141 /* PHY */
5142 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
5143 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
5144 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
5145 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
5146 hw->phy.mdio.mmds = 0;
5147 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
5148 hw->phy.mdio.dev = netdev;
5149 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
5150 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
5151
5152 /* set up this timer and work struct before calling get_invariants
5153 * which might start the timer
5154 */
5155 init_timer(&adapter->sfp_timer);
5156 adapter->sfp_timer.function = &ixgbe_sfp_timer;
5157 adapter->sfp_timer.data = (unsigned long) adapter;
5158
5159 INIT_WORK(&adapter->sfp_task, ixgbe_sfp_task);
5160
5161 /* multispeed fiber has its own tasklet, called from GPI SDP1 context */
5162 INIT_WORK(&adapter->multispeed_fiber_task, ixgbe_multispeed_fiber_task);
5163
5164 /* a new SFP+ module arrival, called from GPI SDP2 context */
5165 INIT_WORK(&adapter->sfp_config_module_task,
5166 ixgbe_sfp_config_module_task);
5167
5168 ii->get_invariants(hw);
5169
5170 /* setup the private structure */
5171 err = ixgbe_sw_init(adapter);
5172 if (err)
5173 goto err_sw_init;
5174
5175 /*
5176 * If there is a fan on this device and it has failed log the
5177 * failure.
5178 */
5179 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
5180 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
5181 if (esdp & IXGBE_ESDP_SDP1)
5182 DPRINTK(PROBE, CRIT,
5183 "Fan has stopped, replace the adapter\n");
5184 }
5185
5186 /* reset_hw fills in the perm_addr as well */
5187 err = hw->mac.ops.reset_hw(hw);
5188 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
5189 hw->mac.type == ixgbe_mac_82598EB) {
5190 /*
5191 * Start a kernel thread to watch for a module to arrive.
5192 * Only do this for 82598, since 82599 will generate
5193 * interrupts on module arrival.
5194 */
5195 set_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5196 mod_timer(&adapter->sfp_timer,
5197 round_jiffies(jiffies + (2 * HZ)));
5198 err = 0;
5199 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5200 dev_err(&adapter->pdev->dev, "failed to load because an "
5201 "unsupported SFP+ module type was detected.\n");
5202 goto err_sw_init;
5203 } else if (err) {
5204 dev_err(&adapter->pdev->dev, "HW Init failed: %d\n", err);
5205 goto err_sw_init;
5206 }
5207
5208 netdev->features = NETIF_F_SG |
5209 NETIF_F_IP_CSUM |
5210 NETIF_F_HW_VLAN_TX |
5211 NETIF_F_HW_VLAN_RX |
5212 NETIF_F_HW_VLAN_FILTER;
5213
5214 netdev->features |= NETIF_F_IPV6_CSUM;
5215 netdev->features |= NETIF_F_TSO;
5216 netdev->features |= NETIF_F_TSO6;
5217 netdev->features |= NETIF_F_GRO;
5218
5219 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
5220 netdev->features |= NETIF_F_SCTP_CSUM;
5221
5222 netdev->vlan_features |= NETIF_F_TSO;
5223 netdev->vlan_features |= NETIF_F_TSO6;
5224 netdev->vlan_features |= NETIF_F_IP_CSUM;
5225 netdev->vlan_features |= NETIF_F_SG;
5226
5227 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
5228 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
5229
5230 #ifdef CONFIG_IXGBE_DCB
5231 netdev->dcbnl_ops = &dcbnl_ops;
5232 #endif
5233
5234 #ifdef IXGBE_FCOE
5235 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
5236 if (hw->mac.ops.get_device_caps) {
5237 hw->mac.ops.get_device_caps(hw, &device_caps);
5238 if (!(device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)) {
5239 netdev->features |= NETIF_F_FCOE_CRC;
5240 netdev->features |= NETIF_F_FSO;
5241 netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX - 1;
5242 } else {
5243 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
5244 }
5245 }
5246 }
5247 #endif /* IXGBE_FCOE */
5248 if (pci_using_dac)
5249 netdev->features |= NETIF_F_HIGHDMA;
5250
5251 if (adapter->flags & IXGBE_FLAG_RSC_ENABLED)
5252 netdev->features |= NETIF_F_LRO;
5253
5254 /* make sure the EEPROM is good */
5255 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
5256 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
5257 err = -EIO;
5258 goto err_eeprom;
5259 }
5260
5261 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
5262 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
5263
5264 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
5265 dev_err(&pdev->dev, "invalid MAC address\n");
5266 err = -EIO;
5267 goto err_eeprom;
5268 }
5269
5270 init_timer(&adapter->watchdog_timer);
5271 adapter->watchdog_timer.function = &ixgbe_watchdog;
5272 adapter->watchdog_timer.data = (unsigned long)adapter;
5273
5274 INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
5275 INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
5276
5277 err = ixgbe_init_interrupt_scheme(adapter);
5278 if (err)
5279 goto err_sw_init;
5280
5281 switch (pdev->device) {
5282 case IXGBE_DEV_ID_82599_KX4:
5283 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
5284 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
5285 break;
5286 default:
5287 adapter->wol = 0;
5288 break;
5289 }
5290 device_init_wakeup(&adapter->pdev->dev, true);
5291 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
5292
5293 /* pick up the PCI bus settings for reporting later */
5294 hw->mac.ops.get_bus_info(hw);
5295
5296 /* print bus type/speed/width info */
5297 dev_info(&pdev->dev, "(PCI Express:%s:%s) %pM\n",
5298 ((hw->bus.speed == ixgbe_bus_speed_5000) ? "5.0Gb/s":
5299 (hw->bus.speed == ixgbe_bus_speed_2500) ? "2.5Gb/s":"Unknown"),
5300 ((hw->bus.width == ixgbe_bus_width_pcie_x8) ? "Width x8" :
5301 (hw->bus.width == ixgbe_bus_width_pcie_x4) ? "Width x4" :
5302 (hw->bus.width == ixgbe_bus_width_pcie_x1) ? "Width x1" :
5303 "Unknown"),
5304 netdev->dev_addr);
5305 ixgbe_read_pba_num_generic(hw, &part_num);
5306 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
5307 dev_info(&pdev->dev, "MAC: %d, PHY: %d, SFP+: %d, PBA No: %06x-%03x\n",
5308 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
5309 (part_num >> 8), (part_num & 0xff));
5310 else
5311 dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
5312 hw->mac.type, hw->phy.type,
5313 (part_num >> 8), (part_num & 0xff));
5314
5315 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
5316 dev_warn(&pdev->dev, "PCI-Express bandwidth available for "
5317 "this card is not sufficient for optimal "
5318 "performance.\n");
5319 dev_warn(&pdev->dev, "For optimal performance a x8 "
5320 "PCI-Express slot is required.\n");
5321 }
5322
5323 /* save off EEPROM version number */
5324 hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
5325
5326 /* reset the hardware with the new settings */
5327 hw->mac.ops.start_hw(hw);
5328
5329 strcpy(netdev->name, "eth%d");
5330 err = register_netdev(netdev);
5331 if (err)
5332 goto err_register;
5333
5334 /* carrier off reporting is important to ethtool even BEFORE open */
5335 netif_carrier_off(netdev);
5336
5337 #ifdef CONFIG_IXGBE_DCA
5338 if (dca_add_requester(&pdev->dev) == 0) {
5339 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
5340 ixgbe_setup_dca(adapter);
5341 }
5342 #endif
5343 /* add san mac addr to netdev */
5344 ixgbe_add_sanmac_netdev(netdev);
5345
5346 dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
5347 cards_found++;
5348 return 0;
5349
5350 err_register:
5351 ixgbe_release_hw_control(adapter);
5352 ixgbe_clear_interrupt_scheme(adapter);
5353 err_sw_init:
5354 err_eeprom:
5355 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5356 del_timer_sync(&adapter->sfp_timer);
5357 cancel_work_sync(&adapter->sfp_task);
5358 cancel_work_sync(&adapter->multispeed_fiber_task);
5359 cancel_work_sync(&adapter->sfp_config_module_task);
5360 iounmap(hw->hw_addr);
5361 err_ioremap:
5362 free_netdev(netdev);
5363 err_alloc_etherdev:
5364 pci_release_selected_regions(pdev, pci_select_bars(pdev,
5365 IORESOURCE_MEM));
5366 err_pci_reg:
5367 err_dma:
5368 pci_disable_device(pdev);
5369 return err;
5370 }
5371
5372 /**
5373 * ixgbe_remove - Device Removal Routine
5374 * @pdev: PCI device information struct
5375 *
5376 * ixgbe_remove is called by the PCI subsystem to alert the driver
5377 * that it should release a PCI device. The could be caused by a
5378 * Hot-Plug event, or because the driver is going to be removed from
5379 * memory.
5380 **/
5381 static void __devexit ixgbe_remove(struct pci_dev *pdev)
5382 {
5383 struct net_device *netdev = pci_get_drvdata(pdev);
5384 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5385 int err;
5386
5387 set_bit(__IXGBE_DOWN, &adapter->state);
5388 /* clear the module not found bit to make sure the worker won't
5389 * reschedule
5390 */
5391 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5392 del_timer_sync(&adapter->watchdog_timer);
5393
5394 del_timer_sync(&adapter->sfp_timer);
5395 cancel_work_sync(&adapter->watchdog_task);
5396 cancel_work_sync(&adapter->sfp_task);
5397 cancel_work_sync(&adapter->multispeed_fiber_task);
5398 cancel_work_sync(&adapter->sfp_config_module_task);
5399 flush_scheduled_work();
5400
5401 #ifdef CONFIG_IXGBE_DCA
5402 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
5403 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
5404 dca_remove_requester(&pdev->dev);
5405 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
5406 }
5407
5408 #endif
5409 #ifdef IXGBE_FCOE
5410 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
5411 ixgbe_cleanup_fcoe(adapter);
5412
5413 #endif /* IXGBE_FCOE */
5414
5415 /* remove the added san mac */
5416 ixgbe_del_sanmac_netdev(netdev);
5417
5418 if (netdev->reg_state == NETREG_REGISTERED)
5419 unregister_netdev(netdev);
5420
5421 ixgbe_clear_interrupt_scheme(adapter);
5422
5423 ixgbe_release_hw_control(adapter);
5424
5425 iounmap(adapter->hw.hw_addr);
5426 pci_release_selected_regions(pdev, pci_select_bars(pdev,
5427 IORESOURCE_MEM));
5428
5429 DPRINTK(PROBE, INFO, "complete\n");
5430
5431 free_netdev(netdev);
5432
5433 err = pci_disable_pcie_error_reporting(pdev);
5434 if (err)
5435 dev_err(&pdev->dev,
5436 "pci_disable_pcie_error_reporting failed 0x%x\n", err);
5437
5438 pci_disable_device(pdev);
5439 }
5440
5441 /**
5442 * ixgbe_io_error_detected - called when PCI error is detected
5443 * @pdev: Pointer to PCI device
5444 * @state: The current pci connection state
5445 *
5446 * This function is called after a PCI bus error affecting
5447 * this device has been detected.
5448 */
5449 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
5450 pci_channel_state_t state)
5451 {
5452 struct net_device *netdev = pci_get_drvdata(pdev);
5453 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5454
5455 netif_device_detach(netdev);
5456
5457 if (state == pci_channel_io_perm_failure)
5458 return PCI_ERS_RESULT_DISCONNECT;
5459
5460 if (netif_running(netdev))
5461 ixgbe_down(adapter);
5462 pci_disable_device(pdev);
5463
5464 /* Request a slot reset. */
5465 return PCI_ERS_RESULT_NEED_RESET;
5466 }
5467
5468 /**
5469 * ixgbe_io_slot_reset - called after the pci bus has been reset.
5470 * @pdev: Pointer to PCI device
5471 *
5472 * Restart the card from scratch, as if from a cold-boot.
5473 */
5474 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
5475 {
5476 struct net_device *netdev = pci_get_drvdata(pdev);
5477 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5478 pci_ers_result_t result;
5479 int err;
5480
5481 if (pci_enable_device_mem(pdev)) {
5482 DPRINTK(PROBE, ERR,
5483 "Cannot re-enable PCI device after reset.\n");
5484 result = PCI_ERS_RESULT_DISCONNECT;
5485 } else {
5486 pci_set_master(pdev);
5487 pci_restore_state(pdev);
5488
5489 pci_wake_from_d3(pdev, false);
5490
5491 ixgbe_reset(adapter);
5492 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5493 result = PCI_ERS_RESULT_RECOVERED;
5494 }
5495
5496 err = pci_cleanup_aer_uncorrect_error_status(pdev);
5497 if (err) {
5498 dev_err(&pdev->dev,
5499 "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n", err);
5500 /* non-fatal, continue */
5501 }
5502
5503 return result;
5504 }
5505
5506 /**
5507 * ixgbe_io_resume - called when traffic can start flowing again.
5508 * @pdev: Pointer to PCI device
5509 *
5510 * This callback is called when the error recovery driver tells us that
5511 * its OK to resume normal operation.
5512 */
5513 static void ixgbe_io_resume(struct pci_dev *pdev)
5514 {
5515 struct net_device *netdev = pci_get_drvdata(pdev);
5516 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5517
5518 if (netif_running(netdev)) {
5519 if (ixgbe_up(adapter)) {
5520 DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
5521 return;
5522 }
5523 }
5524
5525 netif_device_attach(netdev);
5526 }
5527
5528 static struct pci_error_handlers ixgbe_err_handler = {
5529 .error_detected = ixgbe_io_error_detected,
5530 .slot_reset = ixgbe_io_slot_reset,
5531 .resume = ixgbe_io_resume,
5532 };
5533
5534 static struct pci_driver ixgbe_driver = {
5535 .name = ixgbe_driver_name,
5536 .id_table = ixgbe_pci_tbl,
5537 .probe = ixgbe_probe,
5538 .remove = __devexit_p(ixgbe_remove),
5539 #ifdef CONFIG_PM
5540 .suspend = ixgbe_suspend,
5541 .resume = ixgbe_resume,
5542 #endif
5543 .shutdown = ixgbe_shutdown,
5544 .err_handler = &ixgbe_err_handler
5545 };
5546
5547 /**
5548 * ixgbe_init_module - Driver Registration Routine
5549 *
5550 * ixgbe_init_module is the first routine called when the driver is
5551 * loaded. All it does is register with the PCI subsystem.
5552 **/
5553 static int __init ixgbe_init_module(void)
5554 {
5555 int ret;
5556 printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
5557 ixgbe_driver_string, ixgbe_driver_version);
5558
5559 printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
5560
5561 #ifdef CONFIG_IXGBE_DCA
5562 dca_register_notify(&dca_notifier);
5563 #endif
5564
5565 ret = pci_register_driver(&ixgbe_driver);
5566 return ret;
5567 }
5568
5569 module_init(ixgbe_init_module);
5570
5571 /**
5572 * ixgbe_exit_module - Driver Exit Cleanup Routine
5573 *
5574 * ixgbe_exit_module is called just before the driver is removed
5575 * from memory.
5576 **/
5577 static void __exit ixgbe_exit_module(void)
5578 {
5579 #ifdef CONFIG_IXGBE_DCA
5580 dca_unregister_notify(&dca_notifier);
5581 #endif
5582 pci_unregister_driver(&ixgbe_driver);
5583 }
5584
5585 #ifdef CONFIG_IXGBE_DCA
5586 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
5587 void *p)
5588 {
5589 int ret_val;
5590
5591 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
5592 __ixgbe_notify_dca);
5593
5594 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
5595 }
5596
5597 #endif /* CONFIG_IXGBE_DCA */
5598 #ifdef DEBUG
5599 /**
5600 * ixgbe_get_hw_dev_name - return device name string
5601 * used by hardware layer to print debugging information
5602 **/
5603 char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw)
5604 {
5605 struct ixgbe_adapter *adapter = hw->back;
5606 return adapter->netdev->name;
5607 }
5608
5609 #endif
5610 module_exit(ixgbe_exit_module);
5611
5612 /* ixgbe_main.c */
Linux kernel - Deliverables
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