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ixgbe: Add ethtool offline test support
[linux-2.6/kvm.git] / drivers / net / ixgbe / ixgbe_main.c
blob0a3e8a35a0b386fe8a8f8f45758da67d00ea14e6
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 switch (err) {
2602 case 0:
2603 case IXGBE_ERR_SFP_NOT_PRESENT:
2604 break;
2605 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
2606 dev_err(&adapter->pdev->dev, "master disable timed out\n");
2607 break;
2608 default:
2609 dev_err(&adapter->pdev->dev, "Hardware Error: %d\n", err);
2610 }
2611
2612 /* reprogram the RAR[0] in case user changed it. */
2613 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
2614 }
2615
2616 /**
2617 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
2618 * @adapter: board private structure
2619 * @rx_ring: ring to free buffers from
2620 **/
2621 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
2622 struct ixgbe_ring *rx_ring)
2623 {
2624 struct pci_dev *pdev = adapter->pdev;
2625 unsigned long size;
2626 unsigned int i;
2627
2628 /* Free all the Rx ring sk_buffs */
2629
2630 for (i = 0; i < rx_ring->count; i++) {
2631 struct ixgbe_rx_buffer *rx_buffer_info;
2632
2633 rx_buffer_info = &rx_ring->rx_buffer_info[i];
2634 if (rx_buffer_info->dma) {
2635 pci_unmap_single(pdev, rx_buffer_info->dma,
2636 rx_ring->rx_buf_len,
2637 PCI_DMA_FROMDEVICE);
2638 rx_buffer_info->dma = 0;
2639 }
2640 if (rx_buffer_info->skb) {
2641 struct sk_buff *skb = rx_buffer_info->skb;
2642 rx_buffer_info->skb = NULL;
2643 do {
2644 struct sk_buff *this = skb;
2645 skb = skb->prev;
2646 dev_kfree_skb(this);
2647 } while (skb);
2648 }
2649 if (!rx_buffer_info->page)
2650 continue;
2651 pci_unmap_page(pdev, rx_buffer_info->page_dma, PAGE_SIZE / 2,
2652 PCI_DMA_FROMDEVICE);
2653 rx_buffer_info->page_dma = 0;
2654 put_page(rx_buffer_info->page);
2655 rx_buffer_info->page = NULL;
2656 rx_buffer_info->page_offset = 0;
2657 }
2658
2659 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
2660 memset(rx_ring->rx_buffer_info, 0, size);
2661
2662 /* Zero out the descriptor ring */
2663 memset(rx_ring->desc, 0, rx_ring->size);
2664
2665 rx_ring->next_to_clean = 0;
2666 rx_ring->next_to_use = 0;
2667
2668 if (rx_ring->head)
2669 writel(0, adapter->hw.hw_addr + rx_ring->head);
2670 if (rx_ring->tail)
2671 writel(0, adapter->hw.hw_addr + rx_ring->tail);
2672 }
2673
2674 /**
2675 * ixgbe_clean_tx_ring - Free Tx Buffers
2676 * @adapter: board private structure
2677 * @tx_ring: ring to be cleaned
2678 **/
2679 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
2680 struct ixgbe_ring *tx_ring)
2681 {
2682 struct ixgbe_tx_buffer *tx_buffer_info;
2683 unsigned long size;
2684 unsigned int i;
2685
2686 /* Free all the Tx ring sk_buffs */
2687
2688 for (i = 0; i < tx_ring->count; i++) {
2689 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2690 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
2691 }
2692
2693 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
2694 memset(tx_ring->tx_buffer_info, 0, size);
2695
2696 /* Zero out the descriptor ring */
2697 memset(tx_ring->desc, 0, tx_ring->size);
2698
2699 tx_ring->next_to_use = 0;
2700 tx_ring->next_to_clean = 0;
2701
2702 if (tx_ring->head)
2703 writel(0, adapter->hw.hw_addr + tx_ring->head);
2704 if (tx_ring->tail)
2705 writel(0, adapter->hw.hw_addr + tx_ring->tail);
2706 }
2707
2708 /**
2709 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
2710 * @adapter: board private structure
2711 **/
2712 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
2713 {
2714 int i;
2715
2716 for (i = 0; i < adapter->num_rx_queues; i++)
2717 ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2718 }
2719
2720 /**
2721 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
2722 * @adapter: board private structure
2723 **/
2724 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
2725 {
2726 int i;
2727
2728 for (i = 0; i < adapter->num_tx_queues; i++)
2729 ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2730 }
2731
2732 void ixgbe_down(struct ixgbe_adapter *adapter)
2733 {
2734 struct net_device *netdev = adapter->netdev;
2735 struct ixgbe_hw *hw = &adapter->hw;
2736 u32 rxctrl;
2737 u32 txdctl;
2738 int i, j;
2739
2740 /* signal that we are down to the interrupt handler */
2741 set_bit(__IXGBE_DOWN, &adapter->state);
2742
2743 /* disable receives */
2744 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2745 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2746
2747 netif_tx_disable(netdev);
2748
2749 IXGBE_WRITE_FLUSH(hw);
2750 msleep(10);
2751
2752 netif_tx_stop_all_queues(netdev);
2753
2754 ixgbe_irq_disable(adapter);
2755
2756 ixgbe_napi_disable_all(adapter);
2757
2758 del_timer_sync(&adapter->watchdog_timer);
2759 cancel_work_sync(&adapter->watchdog_task);
2760
2761 /* disable transmits in the hardware now that interrupts are off */
2762 for (i = 0; i < adapter->num_tx_queues; i++) {
2763 j = adapter->tx_ring[i].reg_idx;
2764 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2765 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
2766 (txdctl & ~IXGBE_TXDCTL_ENABLE));
2767 }
2768 /* Disable the Tx DMA engine on 82599 */
2769 if (hw->mac.type == ixgbe_mac_82599EB)
2770 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
2771 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
2772 ~IXGBE_DMATXCTL_TE));
2773
2774 netif_carrier_off(netdev);
2775
2776 if (!pci_channel_offline(adapter->pdev))
2777 ixgbe_reset(adapter);
2778 ixgbe_clean_all_tx_rings(adapter);
2779 ixgbe_clean_all_rx_rings(adapter);
2780
2781 #ifdef CONFIG_IXGBE_DCA
2782 /* since we reset the hardware DCA settings were cleared */
2783 ixgbe_setup_dca(adapter);
2784 #endif
2785 }
2786
2787 /**
2788 * ixgbe_poll - NAPI Rx polling callback
2789 * @napi: structure for representing this polling device
2790 * @budget: how many packets driver is allowed to clean
2791 *
2792 * This function is used for legacy and MSI, NAPI mode
2793 **/
2794 static int ixgbe_poll(struct napi_struct *napi, int budget)
2795 {
2796 struct ixgbe_q_vector *q_vector =
2797 container_of(napi, struct ixgbe_q_vector, napi);
2798 struct ixgbe_adapter *adapter = q_vector->adapter;
2799 int tx_clean_complete, work_done = 0;
2800
2801 #ifdef CONFIG_IXGBE_DCA
2802 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
2803 ixgbe_update_tx_dca(adapter, adapter->tx_ring);
2804 ixgbe_update_rx_dca(adapter, adapter->rx_ring);
2805 }
2806 #endif
2807
2808 tx_clean_complete = ixgbe_clean_tx_irq(adapter, adapter->tx_ring);
2809 ixgbe_clean_rx_irq(q_vector, adapter->rx_ring, &work_done, budget);
2810
2811 if (!tx_clean_complete)
2812 work_done = budget;
2813
2814 /* If budget not fully consumed, exit the polling mode */
2815 if (work_done < budget) {
2816 napi_complete(napi);
2817 if (adapter->itr_setting & 1)
2818 ixgbe_set_itr(adapter);
2819 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2820 ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
2821 }
2822 return work_done;
2823 }
2824
2825 /**
2826 * ixgbe_tx_timeout - Respond to a Tx Hang
2827 * @netdev: network interface device structure
2828 **/
2829 static void ixgbe_tx_timeout(struct net_device *netdev)
2830 {
2831 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2832
2833 /* Do the reset outside of interrupt context */
2834 schedule_work(&adapter->reset_task);
2835 }
2836
2837 static void ixgbe_reset_task(struct work_struct *work)
2838 {
2839 struct ixgbe_adapter *adapter;
2840 adapter = container_of(work, struct ixgbe_adapter, reset_task);
2841
2842 /* If we're already down or resetting, just bail */
2843 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
2844 test_bit(__IXGBE_RESETTING, &adapter->state))
2845 return;
2846
2847 adapter->tx_timeout_count++;
2848
2849 ixgbe_reinit_locked(adapter);
2850 }
2851
2852 #ifdef CONFIG_IXGBE_DCB
2853 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
2854 {
2855 bool ret = false;
2856 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_DCB];
2857
2858 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
2859 return ret;
2860
2861 f->mask = 0x7 << 3;
2862 adapter->num_rx_queues = f->indices;
2863 adapter->num_tx_queues = f->indices;
2864 ret = true;
2865
2866 return ret;
2867 }
2868 #endif
2869
2870 /**
2871 * ixgbe_set_rss_queues: Allocate queues for RSS
2872 * @adapter: board private structure to initialize
2873 *
2874 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
2875 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
2876 *
2877 **/
2878 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
2879 {
2880 bool ret = false;
2881 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
2882
2883 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
2884 f->mask = 0xF;
2885 adapter->num_rx_queues = f->indices;
2886 adapter->num_tx_queues = f->indices;
2887 ret = true;
2888 } else {
2889 ret = false;
2890 }
2891
2892 return ret;
2893 }
2894
2895 #ifdef IXGBE_FCOE
2896 /**
2897 * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
2898 * @adapter: board private structure to initialize
2899 *
2900 * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
2901 * The ring feature mask is not used as a mask for FCoE, as it can take any 8
2902 * rx queues out of the max number of rx queues, instead, it is used as the
2903 * index of the first rx queue used by FCoE.
2904 *
2905 **/
2906 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
2907 {
2908 bool ret = false;
2909 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
2910
2911 f->indices = min((int)num_online_cpus(), f->indices);
2912 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
2913 #ifdef CONFIG_IXGBE_DCB
2914 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2915 DPRINTK(PROBE, INFO, "FCOE enabled with DCB \n");
2916 ixgbe_set_dcb_queues(adapter);
2917 }
2918 #endif
2919 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
2920 DPRINTK(PROBE, INFO, "FCOE enabled with RSS \n");
2921 ixgbe_set_rss_queues(adapter);
2922 }
2923 /* adding FCoE rx rings to the end */
2924 f->mask = adapter->num_rx_queues;
2925 adapter->num_rx_queues += f->indices;
2926 if (adapter->num_tx_queues == 0)
2927 adapter->num_tx_queues = f->indices;
2928
2929 ret = true;
2930 }
2931
2932 return ret;
2933 }
2934
2935 #endif /* IXGBE_FCOE */
2936 /*
2937 * ixgbe_set_num_queues: Allocate queues for device, feature dependant
2938 * @adapter: board private structure to initialize
2939 *
2940 * This is the top level queue allocation routine. The order here is very
2941 * important, starting with the "most" number of features turned on at once,
2942 * and ending with the smallest set of features. This way large combinations
2943 * can be allocated if they're turned on, and smaller combinations are the
2944 * fallthrough conditions.
2945 *
2946 **/
2947 static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
2948 {
2949 #ifdef IXGBE_FCOE
2950 if (ixgbe_set_fcoe_queues(adapter))
2951 goto done;
2952
2953 #endif /* IXGBE_FCOE */
2954 #ifdef CONFIG_IXGBE_DCB
2955 if (ixgbe_set_dcb_queues(adapter))
2956 goto done;
2957
2958 #endif
2959 if (ixgbe_set_rss_queues(adapter))
2960 goto done;
2961
2962 /* fallback to base case */
2963 adapter->num_rx_queues = 1;
2964 adapter->num_tx_queues = 1;
2965
2966 done:
2967 /* Notify the stack of the (possibly) reduced Tx Queue count. */
2968 adapter->netdev->real_num_tx_queues = adapter->num_tx_queues;
2969 }
2970
2971 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
2972 int vectors)
2973 {
2974 int err, vector_threshold;
2975
2976 /* We'll want at least 3 (vector_threshold):
2977 * 1) TxQ[0] Cleanup
2978 * 2) RxQ[0] Cleanup
2979 * 3) Other (Link Status Change, etc.)
2980 * 4) TCP Timer (optional)
2981 */
2982 vector_threshold = MIN_MSIX_COUNT;
2983
2984 /* The more we get, the more we will assign to Tx/Rx Cleanup
2985 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
2986 * Right now, we simply care about how many we'll get; we'll
2987 * set them up later while requesting irq's.
2988 */
2989 while (vectors >= vector_threshold) {
2990 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
2991 vectors);
2992 if (!err) /* Success in acquiring all requested vectors. */
2993 break;
2994 else if (err < 0)
2995 vectors = 0; /* Nasty failure, quit now */
2996 else /* err == number of vectors we should try again with */
2997 vectors = err;
2998 }
2999
3000 if (vectors < vector_threshold) {
3001 /* Can't allocate enough MSI-X interrupts? Oh well.
3002 * This just means we'll go with either a single MSI
3003 * vector or fall back to legacy interrupts.
3004 */
3005 DPRINTK(HW, DEBUG, "Unable to allocate MSI-X interrupts\n");
3006 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3007 kfree(adapter->msix_entries);
3008 adapter->msix_entries = NULL;
3009 } else {
3010 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
3011 /*
3012 * Adjust for only the vectors we'll use, which is minimum
3013 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
3014 * vectors we were allocated.
3015 */
3016 adapter->num_msix_vectors = min(vectors,
3017 adapter->max_msix_q_vectors + NON_Q_VECTORS);
3018 }
3019 }
3020
3021 /**
3022 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
3023 * @adapter: board private structure to initialize
3024 *
3025 * Cache the descriptor ring offsets for RSS to the assigned rings.
3026 *
3027 **/
3028 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
3029 {
3030 int i;
3031 bool ret = false;
3032
3033 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3034 for (i = 0; i < adapter->num_rx_queues; i++)
3035 adapter->rx_ring[i].reg_idx = i;
3036 for (i = 0; i < adapter->num_tx_queues; i++)
3037 adapter->tx_ring[i].reg_idx = i;
3038 ret = true;
3039 } else {
3040 ret = false;
3041 }
3042
3043 return ret;
3044 }
3045
3046 #ifdef CONFIG_IXGBE_DCB
3047 /**
3048 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
3049 * @adapter: board private structure to initialize
3050 *
3051 * Cache the descriptor ring offsets for DCB to the assigned rings.
3052 *
3053 **/
3054 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
3055 {
3056 int i;
3057 bool ret = false;
3058 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
3059
3060 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3061 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
3062 /* the number of queues is assumed to be symmetric */
3063 for (i = 0; i < dcb_i; i++) {
3064 adapter->rx_ring[i].reg_idx = i << 3;
3065 adapter->tx_ring[i].reg_idx = i << 2;
3066 }
3067 ret = true;
3068 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
3069 if (dcb_i == 8) {
3070 /*
3071 * Tx TC0 starts at: descriptor queue 0
3072 * Tx TC1 starts at: descriptor queue 32
3073 * Tx TC2 starts at: descriptor queue 64
3074 * Tx TC3 starts at: descriptor queue 80
3075 * Tx TC4 starts at: descriptor queue 96
3076 * Tx TC5 starts at: descriptor queue 104
3077 * Tx TC6 starts at: descriptor queue 112
3078 * Tx TC7 starts at: descriptor queue 120
3079 *
3080 * Rx TC0-TC7 are offset by 16 queues each
3081 */
3082 for (i = 0; i < 3; i++) {
3083 adapter->tx_ring[i].reg_idx = i << 5;
3084 adapter->rx_ring[i].reg_idx = i << 4;
3085 }
3086 for ( ; i < 5; i++) {
3087 adapter->tx_ring[i].reg_idx =
3088 ((i + 2) << 4);
3089 adapter->rx_ring[i].reg_idx = i << 4;
3090 }
3091 for ( ; i < dcb_i; i++) {
3092 adapter->tx_ring[i].reg_idx =
3093 ((i + 8) << 3);
3094 adapter->rx_ring[i].reg_idx = i << 4;
3095 }
3096
3097 ret = true;
3098 } else if (dcb_i == 4) {
3099 /*
3100 * Tx TC0 starts at: descriptor queue 0
3101 * Tx TC1 starts at: descriptor queue 64
3102 * Tx TC2 starts at: descriptor queue 96
3103 * Tx TC3 starts at: descriptor queue 112
3104 *
3105 * Rx TC0-TC3 are offset by 32 queues each
3106 */
3107 adapter->tx_ring[0].reg_idx = 0;
3108 adapter->tx_ring[1].reg_idx = 64;
3109 adapter->tx_ring[2].reg_idx = 96;
3110 adapter->tx_ring[3].reg_idx = 112;
3111 for (i = 0 ; i < dcb_i; i++)
3112 adapter->rx_ring[i].reg_idx = i << 5;
3113
3114 ret = true;
3115 } else {
3116 ret = false;
3117 }
3118 } else {
3119 ret = false;
3120 }
3121 } else {
3122 ret = false;
3123 }
3124
3125 return ret;
3126 }
3127 #endif
3128
3129 #ifdef IXGBE_FCOE
3130 /**
3131 * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
3132 * @adapter: board private structure to initialize
3133 *
3134 * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
3135 *
3136 */
3137 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
3138 {
3139 int i, fcoe_i = 0;
3140 bool ret = false;
3141 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3142
3143 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3144 #ifdef CONFIG_IXGBE_DCB
3145 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3146 ixgbe_cache_ring_dcb(adapter);
3147 fcoe_i = adapter->rx_ring[0].reg_idx + 1;
3148 }
3149 #endif /* CONFIG_IXGBE_DCB */
3150 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3151 ixgbe_cache_ring_rss(adapter);
3152 fcoe_i = f->mask;
3153 }
3154 for (i = 0; i < f->indices; i++, fcoe_i++)
3155 adapter->rx_ring[f->mask + i].reg_idx = fcoe_i;
3156 ret = true;
3157 }
3158 return ret;
3159 }
3160
3161 #endif /* IXGBE_FCOE */
3162 /**
3163 * ixgbe_cache_ring_register - Descriptor ring to register mapping
3164 * @adapter: board private structure to initialize
3165 *
3166 * Once we know the feature-set enabled for the device, we'll cache
3167 * the register offset the descriptor ring is assigned to.
3168 *
3169 * Note, the order the various feature calls is important. It must start with
3170 * the "most" features enabled at the same time, then trickle down to the
3171 * least amount of features turned on at once.
3172 **/
3173 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
3174 {
3175 /* start with default case */
3176 adapter->rx_ring[0].reg_idx = 0;
3177 adapter->tx_ring[0].reg_idx = 0;
3178
3179 #ifdef IXGBE_FCOE
3180 if (ixgbe_cache_ring_fcoe(adapter))
3181 return;
3182
3183 #endif /* IXGBE_FCOE */
3184 #ifdef CONFIG_IXGBE_DCB
3185 if (ixgbe_cache_ring_dcb(adapter))
3186 return;
3187
3188 #endif
3189 if (ixgbe_cache_ring_rss(adapter))
3190 return;
3191 }
3192
3193 /**
3194 * ixgbe_alloc_queues - Allocate memory for all rings
3195 * @adapter: board private structure to initialize
3196 *
3197 * We allocate one ring per queue at run-time since we don't know the
3198 * number of queues at compile-time. The polling_netdev array is
3199 * intended for Multiqueue, but should work fine with a single queue.
3200 **/
3201 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
3202 {
3203 int i;
3204
3205 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
3206 sizeof(struct ixgbe_ring), GFP_KERNEL);
3207 if (!adapter->tx_ring)
3208 goto err_tx_ring_allocation;
3209
3210 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
3211 sizeof(struct ixgbe_ring), GFP_KERNEL);
3212 if (!adapter->rx_ring)
3213 goto err_rx_ring_allocation;
3214
3215 for (i = 0; i < adapter->num_tx_queues; i++) {
3216 adapter->tx_ring[i].count = adapter->tx_ring_count;
3217 adapter->tx_ring[i].queue_index = i;
3218 }
3219
3220 for (i = 0; i < adapter->num_rx_queues; i++) {
3221 adapter->rx_ring[i].count = adapter->rx_ring_count;
3222 adapter->rx_ring[i].queue_index = i;
3223 }
3224
3225 ixgbe_cache_ring_register(adapter);
3226
3227 return 0;
3228
3229 err_rx_ring_allocation:
3230 kfree(adapter->tx_ring);
3231 err_tx_ring_allocation:
3232 return -ENOMEM;
3233 }
3234
3235 /**
3236 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
3237 * @adapter: board private structure to initialize
3238 *
3239 * Attempt to configure the interrupts using the best available
3240 * capabilities of the hardware and the kernel.
3241 **/
3242 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
3243 {
3244 struct ixgbe_hw *hw = &adapter->hw;
3245 int err = 0;
3246 int vector, v_budget;
3247
3248 /*
3249 * It's easy to be greedy for MSI-X vectors, but it really
3250 * doesn't do us much good if we have a lot more vectors
3251 * than CPU's. So let's be conservative and only ask for
3252 * (roughly) twice the number of vectors as there are CPU's.
3253 */
3254 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
3255 (int)(num_online_cpus() * 2)) + NON_Q_VECTORS;
3256
3257 /*
3258 * At the same time, hardware can only support a maximum of
3259 * hw.mac->max_msix_vectors vectors. With features
3260 * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
3261 * descriptor queues supported by our device. Thus, we cap it off in
3262 * those rare cases where the cpu count also exceeds our vector limit.
3263 */
3264 v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
3265
3266 /* A failure in MSI-X entry allocation isn't fatal, but it does
3267 * mean we disable MSI-X capabilities of the adapter. */
3268 adapter->msix_entries = kcalloc(v_budget,
3269 sizeof(struct msix_entry), GFP_KERNEL);
3270 if (adapter->msix_entries) {
3271 for (vector = 0; vector < v_budget; vector++)
3272 adapter->msix_entries[vector].entry = vector;
3273
3274 ixgbe_acquire_msix_vectors(adapter, v_budget);
3275
3276 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3277 goto out;
3278 }
3279
3280 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
3281 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
3282 ixgbe_set_num_queues(adapter);
3283
3284 err = pci_enable_msi(adapter->pdev);
3285 if (!err) {
3286 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
3287 } else {
3288 DPRINTK(HW, DEBUG, "Unable to allocate MSI interrupt, "
3289 "falling back to legacy. Error: %d\n", err);
3290 /* reset err */
3291 err = 0;
3292 }
3293
3294 out:
3295 return err;
3296 }
3297
3298 /**
3299 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
3300 * @adapter: board private structure to initialize
3301 *
3302 * We allocate one q_vector per queue interrupt. If allocation fails we
3303 * return -ENOMEM.
3304 **/
3305 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
3306 {
3307 int q_idx, num_q_vectors;
3308 struct ixgbe_q_vector *q_vector;
3309 int napi_vectors;
3310 int (*poll)(struct napi_struct *, int);
3311
3312 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3313 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3314 napi_vectors = adapter->num_rx_queues;
3315 poll = &ixgbe_clean_rxonly;
3316 } else {
3317 num_q_vectors = 1;
3318 napi_vectors = 1;
3319 poll = &ixgbe_poll;
3320 }
3321
3322 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3323 q_vector = kzalloc(sizeof(struct ixgbe_q_vector), GFP_KERNEL);
3324 if (!q_vector)
3325 goto err_out;
3326 q_vector->adapter = adapter;
3327 q_vector->v_idx = q_idx;
3328 q_vector->eitr = adapter->eitr_param;
3329 if (q_idx < napi_vectors)
3330 netif_napi_add(adapter->netdev, &q_vector->napi,
3331 (*poll), 64);
3332 adapter->q_vector[q_idx] = q_vector;
3333 }
3334
3335 return 0;
3336
3337 err_out:
3338 while (q_idx) {
3339 q_idx--;
3340 q_vector = adapter->q_vector[q_idx];
3341 netif_napi_del(&q_vector->napi);
3342 kfree(q_vector);
3343 adapter->q_vector[q_idx] = NULL;
3344 }
3345 return -ENOMEM;
3346 }
3347
3348 /**
3349 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
3350 * @adapter: board private structure to initialize
3351 *
3352 * This function frees the memory allocated to the q_vectors. In addition if
3353 * NAPI is enabled it will delete any references to the NAPI struct prior
3354 * to freeing the q_vector.
3355 **/
3356 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
3357 {
3358 int q_idx, num_q_vectors;
3359 int napi_vectors;
3360
3361 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3362 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3363 napi_vectors = adapter->num_rx_queues;
3364 } else {
3365 num_q_vectors = 1;
3366 napi_vectors = 1;
3367 }
3368
3369 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3370 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
3371
3372 adapter->q_vector[q_idx] = NULL;
3373 if (q_idx < napi_vectors)
3374 netif_napi_del(&q_vector->napi);
3375 kfree(q_vector);
3376 }
3377 }
3378
3379 void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
3380 {
3381 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3382 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3383 pci_disable_msix(adapter->pdev);
3384 kfree(adapter->msix_entries);
3385 adapter->msix_entries = NULL;
3386 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
3387 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
3388 pci_disable_msi(adapter->pdev);
3389 }
3390 return;
3391 }
3392
3393 /**
3394 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
3395 * @adapter: board private structure to initialize
3396 *
3397 * We determine which interrupt scheme to use based on...
3398 * - Kernel support (MSI, MSI-X)
3399 * - which can be user-defined (via MODULE_PARAM)
3400 * - Hardware queue count (num_*_queues)
3401 * - defined by miscellaneous hardware support/features (RSS, etc.)
3402 **/
3403 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
3404 {
3405 int err;
3406
3407 /* Number of supported queues */
3408 ixgbe_set_num_queues(adapter);
3409
3410 err = ixgbe_set_interrupt_capability(adapter);
3411 if (err) {
3412 DPRINTK(PROBE, ERR, "Unable to setup interrupt capabilities\n");
3413 goto err_set_interrupt;
3414 }
3415
3416 err = ixgbe_alloc_q_vectors(adapter);
3417 if (err) {
3418 DPRINTK(PROBE, ERR, "Unable to allocate memory for queue "
3419 "vectors\n");
3420 goto err_alloc_q_vectors;
3421 }
3422
3423 err = ixgbe_alloc_queues(adapter);
3424 if (err) {
3425 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
3426 goto err_alloc_queues;
3427 }
3428
3429 DPRINTK(DRV, INFO, "Multiqueue %s: Rx Queue count = %u, "
3430 "Tx Queue count = %u\n",
3431 (adapter->num_rx_queues > 1) ? "Enabled" :
3432 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
3433
3434 set_bit(__IXGBE_DOWN, &adapter->state);
3435
3436 return 0;
3437
3438 err_alloc_queues:
3439 ixgbe_free_q_vectors(adapter);
3440 err_alloc_q_vectors:
3441 ixgbe_reset_interrupt_capability(adapter);
3442 err_set_interrupt:
3443 return err;
3444 }
3445
3446 /**
3447 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
3448 * @adapter: board private structure to clear interrupt scheme on
3449 *
3450 * We go through and clear interrupt specific resources and reset the structure
3451 * to pre-load conditions
3452 **/
3453 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
3454 {
3455 kfree(adapter->tx_ring);
3456 kfree(adapter->rx_ring);
3457 adapter->tx_ring = NULL;
3458 adapter->rx_ring = NULL;
3459
3460 ixgbe_free_q_vectors(adapter);
3461 ixgbe_reset_interrupt_capability(adapter);
3462 }
3463
3464 /**
3465 * ixgbe_sfp_timer - worker thread to find a missing module
3466 * @data: pointer to our adapter struct
3467 **/
3468 static void ixgbe_sfp_timer(unsigned long data)
3469 {
3470 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
3471
3472 /*
3473 * Do the sfp_timer outside of interrupt context due to the
3474 * delays that sfp+ detection requires
3475 */
3476 schedule_work(&adapter->sfp_task);
3477 }
3478
3479 /**
3480 * ixgbe_sfp_task - worker thread to find a missing module
3481 * @work: pointer to work_struct containing our data
3482 **/
3483 static void ixgbe_sfp_task(struct work_struct *work)
3484 {
3485 struct ixgbe_adapter *adapter = container_of(work,
3486 struct ixgbe_adapter,
3487 sfp_task);
3488 struct ixgbe_hw *hw = &adapter->hw;
3489
3490 if ((hw->phy.type == ixgbe_phy_nl) &&
3491 (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
3492 s32 ret = hw->phy.ops.identify_sfp(hw);
3493 if (ret)
3494 goto reschedule;
3495 ret = hw->phy.ops.reset(hw);
3496 if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
3497 DPRINTK(PROBE, ERR, "failed to initialize because an "
3498 "unsupported SFP+ module type was detected.\n"
3499 "Reload the driver after installing a "
3500 "supported module.\n");
3501 unregister_netdev(adapter->netdev);
3502 } else {
3503 DPRINTK(PROBE, INFO, "detected SFP+: %d\n",
3504 hw->phy.sfp_type);
3505 }
3506 /* don't need this routine any more */
3507 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3508 }
3509 return;
3510 reschedule:
3511 if (test_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state))
3512 mod_timer(&adapter->sfp_timer,
3513 round_jiffies(jiffies + (2 * HZ)));
3514 }
3515
3516 /**
3517 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
3518 * @adapter: board private structure to initialize
3519 *
3520 * ixgbe_sw_init initializes the Adapter private data structure.
3521 * Fields are initialized based on PCI device information and
3522 * OS network device settings (MTU size).
3523 **/
3524 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
3525 {
3526 struct ixgbe_hw *hw = &adapter->hw;
3527 struct pci_dev *pdev = adapter->pdev;
3528 unsigned int rss;
3529 #ifdef CONFIG_IXGBE_DCB
3530 int j;
3531 struct tc_configuration *tc;
3532 #endif
3533
3534 /* PCI config space info */
3535
3536 hw->vendor_id = pdev->vendor;
3537 hw->device_id = pdev->device;
3538 hw->revision_id = pdev->revision;
3539 hw->subsystem_vendor_id = pdev->subsystem_vendor;
3540 hw->subsystem_device_id = pdev->subsystem_device;
3541
3542 /* Set capability flags */
3543 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
3544 adapter->ring_feature[RING_F_RSS].indices = rss;
3545 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
3546 adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
3547 if (hw->mac.type == ixgbe_mac_82598EB) {
3548 if (hw->device_id == IXGBE_DEV_ID_82598AT)
3549 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
3550 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
3551 } else if (hw->mac.type == ixgbe_mac_82599EB) {
3552 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
3553 adapter->flags |= IXGBE_FLAG_RSC_CAPABLE;
3554 adapter->flags |= IXGBE_FLAG_RSC_ENABLED;
3555 #ifdef IXGBE_FCOE
3556 adapter->flags |= IXGBE_FLAG_FCOE_ENABLED;
3557 adapter->ring_feature[RING_F_FCOE].indices = IXGBE_FCRETA_SIZE;
3558 #endif /* IXGBE_FCOE */
3559 }
3560
3561 #ifdef CONFIG_IXGBE_DCB
3562 /* Configure DCB traffic classes */
3563 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
3564 tc = &adapter->dcb_cfg.tc_config[j];
3565 tc->path[DCB_TX_CONFIG].bwg_id = 0;
3566 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
3567 tc->path[DCB_RX_CONFIG].bwg_id = 0;
3568 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
3569 tc->dcb_pfc = pfc_disabled;
3570 }
3571 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
3572 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
3573 adapter->dcb_cfg.rx_pba_cfg = pba_equal;
3574 adapter->dcb_cfg.pfc_mode_enable = false;
3575 adapter->dcb_cfg.round_robin_enable = false;
3576 adapter->dcb_set_bitmap = 0x00;
3577 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
3578 adapter->ring_feature[RING_F_DCB].indices);
3579
3580 #endif
3581
3582 /* default flow control settings */
3583 hw->fc.requested_mode = ixgbe_fc_full;
3584 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
3585 #ifdef CONFIG_DCB
3586 adapter->last_lfc_mode = hw->fc.current_mode;
3587 #endif
3588 hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
3589 hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
3590 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
3591 hw->fc.send_xon = true;
3592 hw->fc.disable_fc_autoneg = false;
3593
3594 /* enable itr by default in dynamic mode */
3595 adapter->itr_setting = 1;
3596 adapter->eitr_param = 20000;
3597
3598 /* set defaults for eitr in MegaBytes */
3599 adapter->eitr_low = 10;
3600 adapter->eitr_high = 20;
3601
3602 /* set default ring sizes */
3603 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
3604 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
3605
3606 /* initialize eeprom parameters */
3607 if (ixgbe_init_eeprom_params_generic(hw)) {
3608 dev_err(&pdev->dev, "EEPROM initialization failed\n");
3609 return -EIO;
3610 }
3611
3612 /* enable rx csum by default */
3613 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
3614
3615 set_bit(__IXGBE_DOWN, &adapter->state);
3616
3617 return 0;
3618 }
3619
3620 /**
3621 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
3622 * @adapter: board private structure
3623 * @tx_ring: tx descriptor ring (for a specific queue) to setup
3624 *
3625 * Return 0 on success, negative on failure
3626 **/
3627 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
3628 struct ixgbe_ring *tx_ring)
3629 {
3630 struct pci_dev *pdev = adapter->pdev;
3631 int size;
3632
3633 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
3634 tx_ring->tx_buffer_info = vmalloc(size);
3635 if (!tx_ring->tx_buffer_info)
3636 goto err;
3637 memset(tx_ring->tx_buffer_info, 0, size);
3638
3639 /* round up to nearest 4K */
3640 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
3641 tx_ring->size = ALIGN(tx_ring->size, 4096);
3642
3643 tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
3644 &tx_ring->dma);
3645 if (!tx_ring->desc)
3646 goto err;
3647
3648 tx_ring->next_to_use = 0;
3649 tx_ring->next_to_clean = 0;
3650 tx_ring->work_limit = tx_ring->count;
3651 return 0;
3652
3653 err:
3654 vfree(tx_ring->tx_buffer_info);
3655 tx_ring->tx_buffer_info = NULL;
3656 DPRINTK(PROBE, ERR, "Unable to allocate memory for the transmit "
3657 "descriptor ring\n");
3658 return -ENOMEM;
3659 }
3660
3661 /**
3662 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
3663 * @adapter: board private structure
3664 *
3665 * If this function returns with an error, then it's possible one or
3666 * more of the rings is populated (while the rest are not). It is the
3667 * callers duty to clean those orphaned rings.
3668 *
3669 * Return 0 on success, negative on failure
3670 **/
3671 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
3672 {
3673 int i, err = 0;
3674
3675 for (i = 0; i < adapter->num_tx_queues; i++) {
3676 err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]);
3677 if (!err)
3678 continue;
3679 DPRINTK(PROBE, ERR, "Allocation for Tx Queue %u failed\n", i);
3680 break;
3681 }
3682
3683 return err;
3684 }
3685
3686 /**
3687 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
3688 * @adapter: board private structure
3689 * @rx_ring: rx descriptor ring (for a specific queue) to setup
3690 *
3691 * Returns 0 on success, negative on failure
3692 **/
3693 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
3694 struct ixgbe_ring *rx_ring)
3695 {
3696 struct pci_dev *pdev = adapter->pdev;
3697 int size;
3698
3699 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
3700 rx_ring->rx_buffer_info = vmalloc(size);
3701 if (!rx_ring->rx_buffer_info) {
3702 DPRINTK(PROBE, ERR,
3703 "vmalloc allocation failed for the rx desc ring\n");
3704 goto alloc_failed;
3705 }
3706 memset(rx_ring->rx_buffer_info, 0, size);
3707
3708 /* Round up to nearest 4K */
3709 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
3710 rx_ring->size = ALIGN(rx_ring->size, 4096);
3711
3712 rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size, &rx_ring->dma);
3713
3714 if (!rx_ring->desc) {
3715 DPRINTK(PROBE, ERR,
3716 "Memory allocation failed for the rx desc ring\n");
3717 vfree(rx_ring->rx_buffer_info);
3718 goto alloc_failed;
3719 }
3720
3721 rx_ring->next_to_clean = 0;
3722 rx_ring->next_to_use = 0;
3723
3724 return 0;
3725
3726 alloc_failed:
3727 return -ENOMEM;
3728 }
3729
3730 /**
3731 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
3732 * @adapter: board private structure
3733 *
3734 * If this function returns with an error, then it's possible one or
3735 * more of the rings is populated (while the rest are not). It is the
3736 * callers duty to clean those orphaned rings.
3737 *
3738 * Return 0 on success, negative on failure
3739 **/
3740
3741 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
3742 {
3743 int i, err = 0;
3744
3745 for (i = 0; i < adapter->num_rx_queues; i++) {
3746 err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]);
3747 if (!err)
3748 continue;
3749 DPRINTK(PROBE, ERR, "Allocation for Rx Queue %u failed\n", i);
3750 break;
3751 }
3752
3753 return err;
3754 }
3755
3756 /**
3757 * ixgbe_free_tx_resources - Free Tx Resources per Queue
3758 * @adapter: board private structure
3759 * @tx_ring: Tx descriptor ring for a specific queue
3760 *
3761 * Free all transmit software resources
3762 **/
3763 void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
3764 struct ixgbe_ring *tx_ring)
3765 {
3766 struct pci_dev *pdev = adapter->pdev;
3767
3768 ixgbe_clean_tx_ring(adapter, tx_ring);
3769
3770 vfree(tx_ring->tx_buffer_info);
3771 tx_ring->tx_buffer_info = NULL;
3772
3773 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
3774
3775 tx_ring->desc = NULL;
3776 }
3777
3778 /**
3779 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
3780 * @adapter: board private structure
3781 *
3782 * Free all transmit software resources
3783 **/
3784 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
3785 {
3786 int i;
3787
3788 for (i = 0; i < adapter->num_tx_queues; i++)
3789 if (adapter->tx_ring[i].desc)
3790 ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
3791 }
3792
3793 /**
3794 * ixgbe_free_rx_resources - Free Rx Resources
3795 * @adapter: board private structure
3796 * @rx_ring: ring to clean the resources from
3797 *
3798 * Free all receive software resources
3799 **/
3800 void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
3801 struct ixgbe_ring *rx_ring)
3802 {
3803 struct pci_dev *pdev = adapter->pdev;
3804
3805 ixgbe_clean_rx_ring(adapter, rx_ring);
3806
3807 vfree(rx_ring->rx_buffer_info);
3808 rx_ring->rx_buffer_info = NULL;
3809
3810 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
3811
3812 rx_ring->desc = NULL;
3813 }
3814
3815 /**
3816 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
3817 * @adapter: board private structure
3818 *
3819 * Free all receive software resources
3820 **/
3821 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
3822 {
3823 int i;
3824
3825 for (i = 0; i < adapter->num_rx_queues; i++)
3826 if (adapter->rx_ring[i].desc)
3827 ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
3828 }
3829
3830 /**
3831 * ixgbe_change_mtu - Change the Maximum Transfer Unit
3832 * @netdev: network interface device structure
3833 * @new_mtu: new value for maximum frame size
3834 *
3835 * Returns 0 on success, negative on failure
3836 **/
3837 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
3838 {
3839 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3840 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3841
3842 /* MTU < 68 is an error and causes problems on some kernels */
3843 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
3844 return -EINVAL;
3845
3846 DPRINTK(PROBE, INFO, "changing MTU from %d to %d\n",
3847 netdev->mtu, new_mtu);
3848 /* must set new MTU before calling down or up */
3849 netdev->mtu = new_mtu;
3850
3851 if (netif_running(netdev))
3852 ixgbe_reinit_locked(adapter);
3853
3854 return 0;
3855 }
3856
3857 /**
3858 * ixgbe_open - Called when a network interface is made active
3859 * @netdev: network interface device structure
3860 *
3861 * Returns 0 on success, negative value on failure
3862 *
3863 * The open entry point is called when a network interface is made
3864 * active by the system (IFF_UP). At this point all resources needed
3865 * for transmit and receive operations are allocated, the interrupt
3866 * handler is registered with the OS, the watchdog timer is started,
3867 * and the stack is notified that the interface is ready.
3868 **/
3869 static int ixgbe_open(struct net_device *netdev)
3870 {
3871 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3872 int err;
3873
3874 /* disallow open during test */
3875 if (test_bit(__IXGBE_TESTING, &adapter->state))
3876 return -EBUSY;
3877
3878 netif_carrier_off(netdev);
3879
3880 /* allocate transmit descriptors */
3881 err = ixgbe_setup_all_tx_resources(adapter);
3882 if (err)
3883 goto err_setup_tx;
3884
3885 /* allocate receive descriptors */
3886 err = ixgbe_setup_all_rx_resources(adapter);
3887 if (err)
3888 goto err_setup_rx;
3889
3890 ixgbe_configure(adapter);
3891
3892 err = ixgbe_request_irq(adapter);
3893 if (err)
3894 goto err_req_irq;
3895
3896 err = ixgbe_up_complete(adapter);
3897 if (err)
3898 goto err_up;
3899
3900 netif_tx_start_all_queues(netdev);
3901
3902 return 0;
3903
3904 err_up:
3905 ixgbe_release_hw_control(adapter);
3906 ixgbe_free_irq(adapter);
3907 err_req_irq:
3908 err_setup_rx:
3909 ixgbe_free_all_rx_resources(adapter);
3910 err_setup_tx:
3911 ixgbe_free_all_tx_resources(adapter);
3912 ixgbe_reset(adapter);
3913
3914 return err;
3915 }
3916
3917 /**
3918 * ixgbe_close - Disables a network interface
3919 * @netdev: network interface device structure
3920 *
3921 * Returns 0, this is not allowed to fail
3922 *
3923 * The close entry point is called when an interface is de-activated
3924 * by the OS. The hardware is still under the drivers control, but
3925 * needs to be disabled. A global MAC reset is issued to stop the
3926 * hardware, and all transmit and receive resources are freed.
3927 **/
3928 static int ixgbe_close(struct net_device *netdev)
3929 {
3930 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3931
3932 ixgbe_down(adapter);
3933 ixgbe_free_irq(adapter);
3934
3935 ixgbe_free_all_tx_resources(adapter);
3936 ixgbe_free_all_rx_resources(adapter);
3937
3938 ixgbe_release_hw_control(adapter);
3939
3940 return 0;
3941 }
3942
3943 #ifdef CONFIG_PM
3944 static int ixgbe_resume(struct pci_dev *pdev)
3945 {
3946 struct net_device *netdev = pci_get_drvdata(pdev);
3947 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3948 u32 err;
3949
3950 pci_set_power_state(pdev, PCI_D0);
3951 pci_restore_state(pdev);
3952
3953 err = pci_enable_device_mem(pdev);
3954 if (err) {
3955 printk(KERN_ERR "ixgbe: Cannot enable PCI device from "
3956 "suspend\n");
3957 return err;
3958 }
3959 pci_set_master(pdev);
3960
3961 pci_wake_from_d3(pdev, false);
3962
3963 err = ixgbe_init_interrupt_scheme(adapter);
3964 if (err) {
3965 printk(KERN_ERR "ixgbe: Cannot initialize interrupts for "
3966 "device\n");
3967 return err;
3968 }
3969
3970 ixgbe_reset(adapter);
3971
3972 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
3973
3974 if (netif_running(netdev)) {
3975 err = ixgbe_open(adapter->netdev);
3976 if (err)
3977 return err;
3978 }
3979
3980 netif_device_attach(netdev);
3981
3982 return 0;
3983 }
3984 #endif /* CONFIG_PM */
3985
3986 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
3987 {
3988 struct net_device *netdev = pci_get_drvdata(pdev);
3989 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3990 struct ixgbe_hw *hw = &adapter->hw;
3991 u32 ctrl, fctrl;
3992 u32 wufc = adapter->wol;
3993 #ifdef CONFIG_PM
3994 int retval = 0;
3995 #endif
3996
3997 netif_device_detach(netdev);
3998
3999 if (netif_running(netdev)) {
4000 ixgbe_down(adapter);
4001 ixgbe_free_irq(adapter);
4002 ixgbe_free_all_tx_resources(adapter);
4003 ixgbe_free_all_rx_resources(adapter);
4004 }
4005 ixgbe_clear_interrupt_scheme(adapter);
4006
4007 #ifdef CONFIG_PM
4008 retval = pci_save_state(pdev);
4009 if (retval)
4010 return retval;
4011
4012 #endif
4013 if (wufc) {
4014 ixgbe_set_rx_mode(netdev);
4015
4016 /* turn on all-multi mode if wake on multicast is enabled */
4017 if (wufc & IXGBE_WUFC_MC) {
4018 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4019 fctrl |= IXGBE_FCTRL_MPE;
4020 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
4021 }
4022
4023 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
4024 ctrl |= IXGBE_CTRL_GIO_DIS;
4025 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
4026
4027 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
4028 } else {
4029 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
4030 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
4031 }
4032
4033 if (wufc && hw->mac.type == ixgbe_mac_82599EB)
4034 pci_wake_from_d3(pdev, true);
4035 else
4036 pci_wake_from_d3(pdev, false);
4037
4038 *enable_wake = !!wufc;
4039
4040 ixgbe_release_hw_control(adapter);
4041
4042 pci_disable_device(pdev);
4043
4044 return 0;
4045 }
4046
4047 #ifdef CONFIG_PM
4048 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
4049 {
4050 int retval;
4051 bool wake;
4052
4053 retval = __ixgbe_shutdown(pdev, &wake);
4054 if (retval)
4055 return retval;
4056
4057 if (wake) {
4058 pci_prepare_to_sleep(pdev);
4059 } else {
4060 pci_wake_from_d3(pdev, false);
4061 pci_set_power_state(pdev, PCI_D3hot);
4062 }
4063
4064 return 0;
4065 }
4066 #endif /* CONFIG_PM */
4067
4068 static void ixgbe_shutdown(struct pci_dev *pdev)
4069 {
4070 bool wake;
4071
4072 __ixgbe_shutdown(pdev, &wake);
4073
4074 if (system_state == SYSTEM_POWER_OFF) {
4075 pci_wake_from_d3(pdev, wake);
4076 pci_set_power_state(pdev, PCI_D3hot);
4077 }
4078 }
4079
4080 /**
4081 * ixgbe_update_stats - Update the board statistics counters.
4082 * @adapter: board private structure
4083 **/
4084 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
4085 {
4086 struct ixgbe_hw *hw = &adapter->hw;
4087 u64 total_mpc = 0;
4088 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
4089
4090 if (hw->mac.type == ixgbe_mac_82599EB) {
4091 u64 rsc_count = 0;
4092 for (i = 0; i < 16; i++)
4093 adapter->hw_rx_no_dma_resources +=
4094 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4095 for (i = 0; i < adapter->num_rx_queues; i++)
4096 rsc_count += adapter->rx_ring[i].rsc_count;
4097 adapter->rsc_count = rsc_count;
4098 }
4099
4100 adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
4101 for (i = 0; i < 8; i++) {
4102 /* for packet buffers not used, the register should read 0 */
4103 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
4104 missed_rx += mpc;
4105 adapter->stats.mpc[i] += mpc;
4106 total_mpc += adapter->stats.mpc[i];
4107 if (hw->mac.type == ixgbe_mac_82598EB)
4108 adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
4109 adapter->stats.qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
4110 adapter->stats.qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
4111 adapter->stats.qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
4112 adapter->stats.qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
4113 if (hw->mac.type == ixgbe_mac_82599EB) {
4114 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4115 IXGBE_PXONRXCNT(i));
4116 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4117 IXGBE_PXOFFRXCNT(i));
4118 adapter->stats.qprdc[i] += IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4119 } else {
4120 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4121 IXGBE_PXONRXC(i));
4122 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4123 IXGBE_PXOFFRXC(i));
4124 }
4125 adapter->stats.pxontxc[i] += IXGBE_READ_REG(hw,
4126 IXGBE_PXONTXC(i));
4127 adapter->stats.pxofftxc[i] += IXGBE_READ_REG(hw,
4128 IXGBE_PXOFFTXC(i));
4129 }
4130 adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
4131 /* work around hardware counting issue */
4132 adapter->stats.gprc -= missed_rx;
4133
4134 /* 82598 hardware only has a 32 bit counter in the high register */
4135 if (hw->mac.type == ixgbe_mac_82599EB) {
4136 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
4137 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
4138 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
4139 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
4140 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORL);
4141 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
4142 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
4143 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
4144 #ifdef IXGBE_FCOE
4145 adapter->stats.fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
4146 adapter->stats.fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
4147 adapter->stats.fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
4148 adapter->stats.fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
4149 adapter->stats.fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
4150 adapter->stats.fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
4151 #endif /* IXGBE_FCOE */
4152 } else {
4153 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
4154 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
4155 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
4156 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
4157 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
4158 }
4159 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
4160 adapter->stats.bprc += bprc;
4161 adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
4162 if (hw->mac.type == ixgbe_mac_82598EB)
4163 adapter->stats.mprc -= bprc;
4164 adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
4165 adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
4166 adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
4167 adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
4168 adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
4169 adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
4170 adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
4171 adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
4172 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
4173 adapter->stats.lxontxc += lxon;
4174 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
4175 adapter->stats.lxofftxc += lxoff;
4176 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4177 adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
4178 adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
4179 /*
4180 * 82598 errata - tx of flow control packets is included in tx counters
4181 */
4182 xon_off_tot = lxon + lxoff;
4183 adapter->stats.gptc -= xon_off_tot;
4184 adapter->stats.mptc -= xon_off_tot;
4185 adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
4186 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4187 adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
4188 adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
4189 adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
4190 adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
4191 adapter->stats.ptc64 -= xon_off_tot;
4192 adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
4193 adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
4194 adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
4195 adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
4196 adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
4197 adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
4198
4199 /* Fill out the OS statistics structure */
4200 adapter->net_stats.multicast = adapter->stats.mprc;
4201
4202 /* Rx Errors */
4203 adapter->net_stats.rx_errors = adapter->stats.crcerrs +
4204 adapter->stats.rlec;
4205 adapter->net_stats.rx_dropped = 0;
4206 adapter->net_stats.rx_length_errors = adapter->stats.rlec;
4207 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
4208 adapter->net_stats.rx_missed_errors = total_mpc;
4209 }
4210
4211 /**
4212 * ixgbe_watchdog - Timer Call-back
4213 * @data: pointer to adapter cast into an unsigned long
4214 **/
4215 static void ixgbe_watchdog(unsigned long data)
4216 {
4217 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4218 struct ixgbe_hw *hw = &adapter->hw;
4219
4220 /* Do the watchdog outside of interrupt context due to the lovely
4221 * delays that some of the newer hardware requires */
4222 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
4223 u64 eics = 0;
4224 int i;
4225
4226 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++)
4227 eics |= ((u64)1 << i);
4228
4229 /* Cause software interrupt to ensure rx rings are cleaned */
4230 switch (hw->mac.type) {
4231 case ixgbe_mac_82598EB:
4232 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4233 IXGBE_WRITE_REG(hw, IXGBE_EICS, (u32)eics);
4234 } else {
4235 /*
4236 * for legacy and MSI interrupts don't set any
4237 * bits that are enabled for EIAM, because this
4238 * operation would set *both* EIMS and EICS for
4239 * any bit in EIAM
4240 */
4241 IXGBE_WRITE_REG(hw, IXGBE_EICS,
4242 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
4243 }
4244 break;
4245 case ixgbe_mac_82599EB:
4246 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4247 IXGBE_WRITE_REG(hw, IXGBE_EICS_EX(0),
4248 (u32)(eics & 0xFFFFFFFF));
4249 IXGBE_WRITE_REG(hw, IXGBE_EICS_EX(1),
4250 (u32)(eics >> 32));
4251 } else {
4252 /*
4253 * for legacy and MSI interrupts don't set any
4254 * bits that are enabled for EIAM, because this
4255 * operation would set *both* EIMS and EICS for
4256 * any bit in EIAM
4257 */
4258 IXGBE_WRITE_REG(hw, IXGBE_EICS,
4259 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
4260 }
4261 break;
4262 default:
4263 break;
4264 }
4265 /* Reset the timer */
4266 mod_timer(&adapter->watchdog_timer,
4267 round_jiffies(jiffies + 2 * HZ));
4268 }
4269
4270 schedule_work(&adapter->watchdog_task);
4271 }
4272
4273 /**
4274 * ixgbe_multispeed_fiber_task - worker thread to configure multispeed fiber
4275 * @work: pointer to work_struct containing our data
4276 **/
4277 static void ixgbe_multispeed_fiber_task(struct work_struct *work)
4278 {
4279 struct ixgbe_adapter *adapter = container_of(work,
4280 struct ixgbe_adapter,
4281 multispeed_fiber_task);
4282 struct ixgbe_hw *hw = &adapter->hw;
4283 u32 autoneg;
4284
4285 adapter->flags |= IXGBE_FLAG_IN_SFP_LINK_TASK;
4286 if (hw->mac.ops.get_link_capabilities)
4287 hw->mac.ops.get_link_capabilities(hw, &autoneg,
4288 &hw->mac.autoneg);
4289 if (hw->mac.ops.setup_link_speed)
4290 hw->mac.ops.setup_link_speed(hw, autoneg, true, true);
4291 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
4292 adapter->flags &= ~IXGBE_FLAG_IN_SFP_LINK_TASK;
4293 }
4294
4295 /**
4296 * ixgbe_sfp_config_module_task - worker thread to configure a new SFP+ module
4297 * @work: pointer to work_struct containing our data
4298 **/
4299 static void ixgbe_sfp_config_module_task(struct work_struct *work)
4300 {
4301 struct ixgbe_adapter *adapter = container_of(work,
4302 struct ixgbe_adapter,
4303 sfp_config_module_task);
4304 struct ixgbe_hw *hw = &adapter->hw;
4305 u32 err;
4306
4307 adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
4308 err = hw->phy.ops.identify_sfp(hw);
4309 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
4310 DPRINTK(PROBE, ERR, "PHY not supported on this NIC %d\n", err);
4311 ixgbe_down(adapter);
4312 return;
4313 }
4314 hw->mac.ops.setup_sfp(hw);
4315
4316 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
4317 /* This will also work for DA Twinax connections */
4318 schedule_work(&adapter->multispeed_fiber_task);
4319 adapter->flags &= ~IXGBE_FLAG_IN_SFP_MOD_TASK;
4320 }
4321
4322 /**
4323 * ixgbe_watchdog_task - worker thread to bring link up
4324 * @work: pointer to work_struct containing our data
4325 **/
4326 static void ixgbe_watchdog_task(struct work_struct *work)
4327 {
4328 struct ixgbe_adapter *adapter = container_of(work,
4329 struct ixgbe_adapter,
4330 watchdog_task);
4331 struct net_device *netdev = adapter->netdev;
4332 struct ixgbe_hw *hw = &adapter->hw;
4333 u32 link_speed = adapter->link_speed;
4334 bool link_up = adapter->link_up;
4335 int i;
4336 struct ixgbe_ring *tx_ring;
4337 int some_tx_pending = 0;
4338
4339 adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
4340
4341 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
4342 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
4343 if (link_up) {
4344 #ifdef CONFIG_DCB
4345 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4346 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
4347 hw->mac.ops.setup_fc(hw, i);
4348 } else {
4349 hw->mac.ops.setup_fc(hw, 0);
4350 }
4351 #else
4352 hw->mac.ops.setup_fc(hw, 0);
4353 #endif
4354 }
4355
4356 if (link_up ||
4357 time_after(jiffies, (adapter->link_check_timeout +
4358 IXGBE_TRY_LINK_TIMEOUT))) {
4359 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
4360 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
4361 }
4362 adapter->link_up = link_up;
4363 adapter->link_speed = link_speed;
4364 }
4365
4366 if (link_up) {
4367 if (!netif_carrier_ok(netdev)) {
4368 bool flow_rx, flow_tx;
4369
4370 if (hw->mac.type == ixgbe_mac_82599EB) {
4371 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
4372 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
4373 flow_rx = (mflcn & IXGBE_MFLCN_RFCE);
4374 flow_tx = (fccfg & IXGBE_FCCFG_TFCE_802_3X);
4375 } else {
4376 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4377 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
4378 flow_rx = (frctl & IXGBE_FCTRL_RFCE);
4379 flow_tx = (rmcs & IXGBE_RMCS_TFCE_802_3X);
4380 }
4381
4382 printk(KERN_INFO "ixgbe: %s NIC Link is Up %s, "
4383 "Flow Control: %s\n",
4384 netdev->name,
4385 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
4386 "10 Gbps" :
4387 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
4388 "1 Gbps" : "unknown speed")),
4389 ((flow_rx && flow_tx) ? "RX/TX" :
4390 (flow_rx ? "RX" :
4391 (flow_tx ? "TX" : "None"))));
4392
4393 netif_carrier_on(netdev);
4394 } else {
4395 /* Force detection of hung controller */
4396 adapter->detect_tx_hung = true;
4397 }
4398 } else {
4399 adapter->link_up = false;
4400 adapter->link_speed = 0;
4401 if (netif_carrier_ok(netdev)) {
4402 printk(KERN_INFO "ixgbe: %s NIC Link is Down\n",
4403 netdev->name);
4404 netif_carrier_off(netdev);
4405 }
4406 }
4407
4408 if (!netif_carrier_ok(netdev)) {
4409 for (i = 0; i < adapter->num_tx_queues; i++) {
4410 tx_ring = &adapter->tx_ring[i];
4411 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
4412 some_tx_pending = 1;
4413 break;
4414 }
4415 }
4416
4417 if (some_tx_pending) {
4418 /* We've lost link, so the controller stops DMA,
4419 * but we've got queued Tx work that's never going
4420 * to get done, so reset controller to flush Tx.
4421 * (Do the reset outside of interrupt context).
4422 */
4423 schedule_work(&adapter->reset_task);
4424 }
4425 }
4426
4427 ixgbe_update_stats(adapter);
4428 adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
4429 }
4430
4431 static int ixgbe_tso(struct ixgbe_adapter *adapter,
4432 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
4433 u32 tx_flags, u8 *hdr_len)
4434 {
4435 struct ixgbe_adv_tx_context_desc *context_desc;
4436 unsigned int i;
4437 int err;
4438 struct ixgbe_tx_buffer *tx_buffer_info;
4439 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
4440 u32 mss_l4len_idx, l4len;
4441
4442 if (skb_is_gso(skb)) {
4443 if (skb_header_cloned(skb)) {
4444 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
4445 if (err)
4446 return err;
4447 }
4448 l4len = tcp_hdrlen(skb);
4449 *hdr_len += l4len;
4450
4451 if (skb->protocol == htons(ETH_P_IP)) {
4452 struct iphdr *iph = ip_hdr(skb);
4453 iph->tot_len = 0;
4454 iph->check = 0;
4455 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
4456 iph->daddr, 0,
4457 IPPROTO_TCP,
4458 0);
4459 adapter->hw_tso_ctxt++;
4460 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
4461 ipv6_hdr(skb)->payload_len = 0;
4462 tcp_hdr(skb)->check =
4463 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
4464 &ipv6_hdr(skb)->daddr,
4465 0, IPPROTO_TCP, 0);
4466 adapter->hw_tso6_ctxt++;
4467 }
4468
4469 i = tx_ring->next_to_use;
4470
4471 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4472 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4473
4474 /* VLAN MACLEN IPLEN */
4475 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4476 vlan_macip_lens |=
4477 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4478 vlan_macip_lens |= ((skb_network_offset(skb)) <<
4479 IXGBE_ADVTXD_MACLEN_SHIFT);
4480 *hdr_len += skb_network_offset(skb);
4481 vlan_macip_lens |=
4482 (skb_transport_header(skb) - skb_network_header(skb));
4483 *hdr_len +=
4484 (skb_transport_header(skb) - skb_network_header(skb));
4485 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4486 context_desc->seqnum_seed = 0;
4487
4488 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
4489 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
4490 IXGBE_ADVTXD_DTYP_CTXT);
4491
4492 if (skb->protocol == htons(ETH_P_IP))
4493 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4494 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
4495 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4496
4497 /* MSS L4LEN IDX */
4498 mss_l4len_idx =
4499 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
4500 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
4501 /* use index 1 for TSO */
4502 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4503 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
4504
4505 tx_buffer_info->time_stamp = jiffies;
4506 tx_buffer_info->next_to_watch = i;
4507
4508 i++;
4509 if (i == tx_ring->count)
4510 i = 0;
4511 tx_ring->next_to_use = i;
4512
4513 return true;
4514 }
4515 return false;
4516 }
4517
4518 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
4519 struct ixgbe_ring *tx_ring,
4520 struct sk_buff *skb, u32 tx_flags)
4521 {
4522 struct ixgbe_adv_tx_context_desc *context_desc;
4523 unsigned int i;
4524 struct ixgbe_tx_buffer *tx_buffer_info;
4525 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
4526
4527 if (skb->ip_summed == CHECKSUM_PARTIAL ||
4528 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
4529 i = tx_ring->next_to_use;
4530 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4531 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4532
4533 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4534 vlan_macip_lens |=
4535 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4536 vlan_macip_lens |= (skb_network_offset(skb) <<
4537 IXGBE_ADVTXD_MACLEN_SHIFT);
4538 if (skb->ip_summed == CHECKSUM_PARTIAL)
4539 vlan_macip_lens |= (skb_transport_header(skb) -
4540 skb_network_header(skb));
4541
4542 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4543 context_desc->seqnum_seed = 0;
4544
4545 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
4546 IXGBE_ADVTXD_DTYP_CTXT);
4547
4548 if (skb->ip_summed == CHECKSUM_PARTIAL) {
4549 switch (skb->protocol) {
4550 case cpu_to_be16(ETH_P_IP):
4551 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4552 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
4553 type_tucmd_mlhl |=
4554 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4555 else if (ip_hdr(skb)->protocol == IPPROTO_SCTP)
4556 type_tucmd_mlhl |=
4557 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4558 break;
4559 case cpu_to_be16(ETH_P_IPV6):
4560 /* XXX what about other V6 headers?? */
4561 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
4562 type_tucmd_mlhl |=
4563 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4564 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_SCTP)
4565 type_tucmd_mlhl |=
4566 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4567 break;
4568 default:
4569 if (unlikely(net_ratelimit())) {
4570 DPRINTK(PROBE, WARNING,
4571 "partial checksum but proto=%x!\n",
4572 skb->protocol);
4573 }
4574 break;
4575 }
4576 }
4577
4578 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4579 /* use index zero for tx checksum offload */
4580 context_desc->mss_l4len_idx = 0;
4581
4582 tx_buffer_info->time_stamp = jiffies;
4583 tx_buffer_info->next_to_watch = i;
4584
4585 adapter->hw_csum_tx_good++;
4586 i++;
4587 if (i == tx_ring->count)
4588 i = 0;
4589 tx_ring->next_to_use = i;
4590
4591 return true;
4592 }
4593
4594 return false;
4595 }
4596
4597 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
4598 struct ixgbe_ring *tx_ring,
4599 struct sk_buff *skb, u32 tx_flags,
4600 unsigned int first)
4601 {
4602 struct ixgbe_tx_buffer *tx_buffer_info;
4603 unsigned int len;
4604 unsigned int total = skb->len;
4605 unsigned int offset = 0, size, count = 0, i;
4606 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
4607 unsigned int f;
4608 dma_addr_t *map;
4609
4610 i = tx_ring->next_to_use;
4611
4612 if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
4613 dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
4614 return 0;
4615 }
4616
4617 map = skb_shinfo(skb)->dma_maps;
4618
4619 if (tx_flags & IXGBE_TX_FLAGS_FCOE)
4620 /* excluding fcoe_crc_eof for FCoE */
4621 total -= sizeof(struct fcoe_crc_eof);
4622
4623 len = min(skb_headlen(skb), total);
4624 while (len) {
4625 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4626 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
4627
4628 tx_buffer_info->length = size;
4629 tx_buffer_info->dma = map[0] + offset;
4630 tx_buffer_info->time_stamp = jiffies;
4631 tx_buffer_info->next_to_watch = i;
4632
4633 len -= size;
4634 total -= size;
4635 offset += size;
4636 count++;
4637
4638 if (len) {
4639 i++;
4640 if (i == tx_ring->count)
4641 i = 0;
4642 }
4643 }
4644
4645 for (f = 0; f < nr_frags; f++) {
4646 struct skb_frag_struct *frag;
4647
4648 frag = &skb_shinfo(skb)->frags[f];
4649 len = min((unsigned int)frag->size, total);
4650 offset = 0;
4651
4652 while (len) {
4653 i++;
4654 if (i == tx_ring->count)
4655 i = 0;
4656
4657 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4658 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
4659
4660 tx_buffer_info->length = size;
4661 tx_buffer_info->dma = map[f + 1] + offset;
4662 tx_buffer_info->time_stamp = jiffies;
4663 tx_buffer_info->next_to_watch = i;
4664
4665 len -= size;
4666 total -= size;
4667 offset += size;
4668 count++;
4669 }
4670 if (total == 0)
4671 break;
4672 }
4673
4674 tx_ring->tx_buffer_info[i].skb = skb;
4675 tx_ring->tx_buffer_info[first].next_to_watch = i;
4676
4677 return count;
4678 }
4679
4680 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
4681 struct ixgbe_ring *tx_ring,
4682 int tx_flags, int count, u32 paylen, u8 hdr_len)
4683 {
4684 union ixgbe_adv_tx_desc *tx_desc = NULL;
4685 struct ixgbe_tx_buffer *tx_buffer_info;
4686 u32 olinfo_status = 0, cmd_type_len = 0;
4687 unsigned int i;
4688 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
4689
4690 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
4691
4692 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
4693
4694 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4695 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
4696
4697 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
4698 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
4699
4700 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
4701 IXGBE_ADVTXD_POPTS_SHIFT;
4702
4703 /* use index 1 context for tso */
4704 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4705 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
4706 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
4707 IXGBE_ADVTXD_POPTS_SHIFT;
4708
4709 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
4710 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
4711 IXGBE_ADVTXD_POPTS_SHIFT;
4712
4713 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
4714 olinfo_status |= IXGBE_ADVTXD_CC;
4715 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4716 if (tx_flags & IXGBE_TX_FLAGS_FSO)
4717 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
4718 }
4719
4720 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
4721
4722 i = tx_ring->next_to_use;
4723 while (count--) {
4724 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4725 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
4726 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
4727 tx_desc->read.cmd_type_len =
4728 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
4729 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
4730 i++;
4731 if (i == tx_ring->count)
4732 i = 0;
4733 }
4734
4735 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
4736
4737 /*
4738 * Force memory writes to complete before letting h/w
4739 * know there are new descriptors to fetch. (Only
4740 * applicable for weak-ordered memory model archs,
4741 * such as IA-64).
4742 */
4743 wmb();
4744
4745 tx_ring->next_to_use = i;
4746 writel(i, adapter->hw.hw_addr + tx_ring->tail);
4747 }
4748
4749 static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
4750 struct ixgbe_ring *tx_ring, int size)
4751 {
4752 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4753
4754 netif_stop_subqueue(netdev, tx_ring->queue_index);
4755 /* Herbert's original patch had:
4756 * smp_mb__after_netif_stop_queue();
4757 * but since that doesn't exist yet, just open code it. */
4758 smp_mb();
4759
4760 /* We need to check again in a case another CPU has just
4761 * made room available. */
4762 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
4763 return -EBUSY;
4764
4765 /* A reprieve! - use start_queue because it doesn't call schedule */
4766 netif_start_subqueue(netdev, tx_ring->queue_index);
4767 ++adapter->restart_queue;
4768 return 0;
4769 }
4770
4771 static int ixgbe_maybe_stop_tx(struct net_device *netdev,
4772 struct ixgbe_ring *tx_ring, int size)
4773 {
4774 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
4775 return 0;
4776 return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
4777 }
4778
4779 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
4780 {
4781 struct ixgbe_adapter *adapter = netdev_priv(dev);
4782
4783 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
4784 return 0; /* All traffic should default to class 0 */
4785
4786 return skb_tx_hash(dev, skb);
4787 }
4788
4789 static int ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
4790 {
4791 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4792 struct ixgbe_ring *tx_ring;
4793 unsigned int first;
4794 unsigned int tx_flags = 0;
4795 u8 hdr_len = 0;
4796 int r_idx = 0, tso;
4797 int count = 0;
4798 unsigned int f;
4799
4800 r_idx = skb->queue_mapping;
4801 tx_ring = &adapter->tx_ring[r_idx];
4802
4803 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
4804 tx_flags |= vlan_tx_tag_get(skb);
4805 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4806 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
4807 tx_flags |= (skb->queue_mapping << 13);
4808 }
4809 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
4810 tx_flags |= IXGBE_TX_FLAGS_VLAN;
4811 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4812 tx_flags |= (skb->queue_mapping << 13);
4813 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
4814 tx_flags |= IXGBE_TX_FLAGS_VLAN;
4815 }
4816
4817 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
4818 (skb->protocol == htons(ETH_P_FCOE)))
4819 tx_flags |= IXGBE_TX_FLAGS_FCOE;
4820
4821 /* four things can cause us to need a context descriptor */
4822 if (skb_is_gso(skb) ||
4823 (skb->ip_summed == CHECKSUM_PARTIAL) ||
4824 (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
4825 (tx_flags & IXGBE_TX_FLAGS_FCOE))
4826 count++;
4827
4828 count += TXD_USE_COUNT(skb_headlen(skb));
4829 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
4830 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
4831
4832 if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
4833 adapter->tx_busy++;
4834 return NETDEV_TX_BUSY;
4835 }
4836
4837 first = tx_ring->next_to_use;
4838 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
4839 #ifdef IXGBE_FCOE
4840 /* setup tx offload for FCoE */
4841 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
4842 if (tso < 0) {
4843 dev_kfree_skb_any(skb);
4844 return NETDEV_TX_OK;
4845 }
4846 if (tso)
4847 tx_flags |= IXGBE_TX_FLAGS_FSO;
4848 #endif /* IXGBE_FCOE */
4849 } else {
4850 if (skb->protocol == htons(ETH_P_IP))
4851 tx_flags |= IXGBE_TX_FLAGS_IPV4;
4852 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
4853 if (tso < 0) {
4854 dev_kfree_skb_any(skb);
4855 return NETDEV_TX_OK;
4856 }
4857
4858 if (tso)
4859 tx_flags |= IXGBE_TX_FLAGS_TSO;
4860 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
4861 (skb->ip_summed == CHECKSUM_PARTIAL))
4862 tx_flags |= IXGBE_TX_FLAGS_CSUM;
4863 }
4864
4865 count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first);
4866 if (count) {
4867 ixgbe_tx_queue(adapter, tx_ring, tx_flags, count, skb->len,
4868 hdr_len);
4869 ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
4870
4871 } else {
4872 dev_kfree_skb_any(skb);
4873 tx_ring->tx_buffer_info[first].time_stamp = 0;
4874 tx_ring->next_to_use = first;
4875 }
4876
4877 return NETDEV_TX_OK;
4878 }
4879
4880 /**
4881 * ixgbe_get_stats - Get System Network Statistics
4882 * @netdev: network interface device structure
4883 *
4884 * Returns the address of the device statistics structure.
4885 * The statistics are actually updated from the timer callback.
4886 **/
4887 static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
4888 {
4889 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4890
4891 /* only return the current stats */
4892 return &adapter->net_stats;
4893 }
4894
4895 /**
4896 * ixgbe_set_mac - Change the Ethernet Address of the NIC
4897 * @netdev: network interface device structure
4898 * @p: pointer to an address structure
4899 *
4900 * Returns 0 on success, negative on failure
4901 **/
4902 static int ixgbe_set_mac(struct net_device *netdev, void *p)
4903 {
4904 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4905 struct ixgbe_hw *hw = &adapter->hw;
4906 struct sockaddr *addr = p;
4907
4908 if (!is_valid_ether_addr(addr->sa_data))
4909 return -EADDRNOTAVAIL;
4910
4911 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
4912 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
4913
4914 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
4915
4916 return 0;
4917 }
4918
4919 static int
4920 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
4921 {
4922 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4923 struct ixgbe_hw *hw = &adapter->hw;
4924 u16 value;
4925 int rc;
4926
4927 if (prtad != hw->phy.mdio.prtad)
4928 return -EINVAL;
4929 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
4930 if (!rc)
4931 rc = value;
4932 return rc;
4933 }
4934
4935 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
4936 u16 addr, u16 value)
4937 {
4938 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4939 struct ixgbe_hw *hw = &adapter->hw;
4940
4941 if (prtad != hw->phy.mdio.prtad)
4942 return -EINVAL;
4943 return hw->phy.ops.write_reg(hw, addr, devad, value);
4944 }
4945
4946 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
4947 {
4948 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4949
4950 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
4951 }
4952
4953 /**
4954 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
4955 * netdev->dev_addr_list
4956 * @netdev: network interface device structure
4957 *
4958 * Returns non-zero on failure
4959 **/
4960 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
4961 {
4962 int err = 0;
4963 struct ixgbe_adapter *adapter = netdev_priv(dev);
4964 struct ixgbe_mac_info *mac = &adapter->hw.mac;
4965
4966 if (is_valid_ether_addr(mac->san_addr)) {
4967 rtnl_lock();
4968 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
4969 rtnl_unlock();
4970 }
4971 return err;
4972 }
4973
4974 /**
4975 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
4976 * netdev->dev_addr_list
4977 * @netdev: network interface device structure
4978 *
4979 * Returns non-zero on failure
4980 **/
4981 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
4982 {
4983 int err = 0;
4984 struct ixgbe_adapter *adapter = netdev_priv(dev);
4985 struct ixgbe_mac_info *mac = &adapter->hw.mac;
4986
4987 if (is_valid_ether_addr(mac->san_addr)) {
4988 rtnl_lock();
4989 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
4990 rtnl_unlock();
4991 }
4992 return err;
4993 }
4994
4995 #ifdef CONFIG_NET_POLL_CONTROLLER
4996 /*
4997 * Polling 'interrupt' - used by things like netconsole to send skbs
4998 * without having to re-enable interrupts. It's not called while
4999 * the interrupt routine is executing.
5000 */
5001 static void ixgbe_netpoll(struct net_device *netdev)
5002 {
5003 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5004
5005 disable_irq(adapter->pdev->irq);
5006 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
5007 ixgbe_intr(adapter->pdev->irq, netdev);
5008 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
5009 enable_irq(adapter->pdev->irq);
5010 }
5011 #endif
5012
5013 static const struct net_device_ops ixgbe_netdev_ops = {
5014 .ndo_open = ixgbe_open,
5015 .ndo_stop = ixgbe_close,
5016 .ndo_start_xmit = ixgbe_xmit_frame,
5017 .ndo_select_queue = ixgbe_select_queue,
5018 .ndo_get_stats = ixgbe_get_stats,
5019 .ndo_set_rx_mode = ixgbe_set_rx_mode,
5020 .ndo_set_multicast_list = ixgbe_set_rx_mode,
5021 .ndo_validate_addr = eth_validate_addr,
5022 .ndo_set_mac_address = ixgbe_set_mac,
5023 .ndo_change_mtu = ixgbe_change_mtu,
5024 .ndo_tx_timeout = ixgbe_tx_timeout,
5025 .ndo_vlan_rx_register = ixgbe_vlan_rx_register,
5026 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
5027 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
5028 .ndo_do_ioctl = ixgbe_ioctl,
5029 #ifdef CONFIG_NET_POLL_CONTROLLER
5030 .ndo_poll_controller = ixgbe_netpoll,
5031 #endif
5032 #ifdef IXGBE_FCOE
5033 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
5034 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
5035 #endif /* IXGBE_FCOE */
5036 };
5037
5038 /**
5039 * ixgbe_probe - Device Initialization Routine
5040 * @pdev: PCI device information struct
5041 * @ent: entry in ixgbe_pci_tbl
5042 *
5043 * Returns 0 on success, negative on failure
5044 *
5045 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
5046 * The OS initialization, configuring of the adapter private structure,
5047 * and a hardware reset occur.
5048 **/
5049 static int __devinit ixgbe_probe(struct pci_dev *pdev,
5050 const struct pci_device_id *ent)
5051 {
5052 struct net_device *netdev;
5053 struct ixgbe_adapter *adapter = NULL;
5054 struct ixgbe_hw *hw;
5055 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
5056 static int cards_found;
5057 int i, err, pci_using_dac;
5058 #ifdef IXGBE_FCOE
5059 u16 device_caps;
5060 #endif
5061 u32 part_num, eec;
5062
5063 err = pci_enable_device_mem(pdev);
5064 if (err)
5065 return err;
5066
5067 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) &&
5068 !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
5069 pci_using_dac = 1;
5070 } else {
5071 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5072 if (err) {
5073 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5074 if (err) {
5075 dev_err(&pdev->dev, "No usable DMA "
5076 "configuration, aborting\n");
5077 goto err_dma;
5078 }
5079 }
5080 pci_using_dac = 0;
5081 }
5082
5083 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
5084 IORESOURCE_MEM), ixgbe_driver_name);
5085 if (err) {
5086 dev_err(&pdev->dev,
5087 "pci_request_selected_regions failed 0x%x\n", err);
5088 goto err_pci_reg;
5089 }
5090
5091 err = pci_enable_pcie_error_reporting(pdev);
5092 if (err) {
5093 dev_err(&pdev->dev, "pci_enable_pcie_error_reporting failed "
5094 "0x%x\n", err);
5095 /* non-fatal, continue */
5096 }
5097
5098 pci_set_master(pdev);
5099 pci_save_state(pdev);
5100
5101 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES);
5102 if (!netdev) {
5103 err = -ENOMEM;
5104 goto err_alloc_etherdev;
5105 }
5106
5107 SET_NETDEV_DEV(netdev, &pdev->dev);
5108
5109 pci_set_drvdata(pdev, netdev);
5110 adapter = netdev_priv(netdev);
5111
5112 adapter->netdev = netdev;
5113 adapter->pdev = pdev;
5114 hw = &adapter->hw;
5115 hw->back = adapter;
5116 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
5117
5118 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
5119 pci_resource_len(pdev, 0));
5120 if (!hw->hw_addr) {
5121 err = -EIO;
5122 goto err_ioremap;
5123 }
5124
5125 for (i = 1; i <= 5; i++) {
5126 if (pci_resource_len(pdev, i) == 0)
5127 continue;
5128 }
5129
5130 netdev->netdev_ops = &ixgbe_netdev_ops;
5131 ixgbe_set_ethtool_ops(netdev);
5132 netdev->watchdog_timeo = 5 * HZ;
5133 strcpy(netdev->name, pci_name(pdev));
5134
5135 adapter->bd_number = cards_found;
5136
5137 /* Setup hw api */
5138 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
5139 hw->mac.type = ii->mac;
5140
5141 /* EEPROM */
5142 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
5143 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
5144 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
5145 if (!(eec & (1 << 8)))
5146 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
5147
5148 /* PHY */
5149 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
5150 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
5151 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
5152 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
5153 hw->phy.mdio.mmds = 0;
5154 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
5155 hw->phy.mdio.dev = netdev;
5156 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
5157 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
5158
5159 /* set up this timer and work struct before calling get_invariants
5160 * which might start the timer
5161 */
5162 init_timer(&adapter->sfp_timer);
5163 adapter->sfp_timer.function = &ixgbe_sfp_timer;
5164 adapter->sfp_timer.data = (unsigned long) adapter;
5165
5166 INIT_WORK(&adapter->sfp_task, ixgbe_sfp_task);
5167
5168 /* multispeed fiber has its own tasklet, called from GPI SDP1 context */
5169 INIT_WORK(&adapter->multispeed_fiber_task, ixgbe_multispeed_fiber_task);
5170
5171 /* a new SFP+ module arrival, called from GPI SDP2 context */
5172 INIT_WORK(&adapter->sfp_config_module_task,
5173 ixgbe_sfp_config_module_task);
5174
5175 ii->get_invariants(hw);
5176
5177 /* setup the private structure */
5178 err = ixgbe_sw_init(adapter);
5179 if (err)
5180 goto err_sw_init;
5181
5182 /*
5183 * If there is a fan on this device and it has failed log the
5184 * failure.
5185 */
5186 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
5187 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
5188 if (esdp & IXGBE_ESDP_SDP1)
5189 DPRINTK(PROBE, CRIT,
5190 "Fan has stopped, replace the adapter\n");
5191 }
5192
5193 /* reset_hw fills in the perm_addr as well */
5194 err = hw->mac.ops.reset_hw(hw);
5195 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
5196 hw->mac.type == ixgbe_mac_82598EB) {
5197 /*
5198 * Start a kernel thread to watch for a module to arrive.
5199 * Only do this for 82598, since 82599 will generate
5200 * interrupts on module arrival.
5201 */
5202 set_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5203 mod_timer(&adapter->sfp_timer,
5204 round_jiffies(jiffies + (2 * HZ)));
5205 err = 0;
5206 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5207 dev_err(&adapter->pdev->dev, "failed to load because an "
5208 "unsupported SFP+ module type was detected.\n");
5209 goto err_sw_init;
5210 } else if (err) {
5211 dev_err(&adapter->pdev->dev, "HW Init failed: %d\n", err);
5212 goto err_sw_init;
5213 }
5214
5215 netdev->features = NETIF_F_SG |
5216 NETIF_F_IP_CSUM |
5217 NETIF_F_HW_VLAN_TX |
5218 NETIF_F_HW_VLAN_RX |
5219 NETIF_F_HW_VLAN_FILTER;
5220
5221 netdev->features |= NETIF_F_IPV6_CSUM;
5222 netdev->features |= NETIF_F_TSO;
5223 netdev->features |= NETIF_F_TSO6;
5224 netdev->features |= NETIF_F_GRO;
5225
5226 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
5227 netdev->features |= NETIF_F_SCTP_CSUM;
5228
5229 netdev->vlan_features |= NETIF_F_TSO;
5230 netdev->vlan_features |= NETIF_F_TSO6;
5231 netdev->vlan_features |= NETIF_F_IP_CSUM;
5232 netdev->vlan_features |= NETIF_F_SG;
5233
5234 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
5235 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
5236
5237 #ifdef CONFIG_IXGBE_DCB
5238 netdev->dcbnl_ops = &dcbnl_ops;
5239 #endif
5240
5241 #ifdef IXGBE_FCOE
5242 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
5243 if (hw->mac.ops.get_device_caps) {
5244 hw->mac.ops.get_device_caps(hw, &device_caps);
5245 if (!(device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)) {
5246 netdev->features |= NETIF_F_FCOE_CRC;
5247 netdev->features |= NETIF_F_FSO;
5248 netdev->fcoe_ddp_xid = IXGBE_FCOE_DDP_MAX - 1;
5249 } else {
5250 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
5251 }
5252 }
5253 }
5254 #endif /* IXGBE_FCOE */
5255 if (pci_using_dac)
5256 netdev->features |= NETIF_F_HIGHDMA;
5257
5258 if (adapter->flags & IXGBE_FLAG_RSC_ENABLED)
5259 netdev->features |= NETIF_F_LRO;
5260
5261 /* make sure the EEPROM is good */
5262 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
5263 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
5264 err = -EIO;
5265 goto err_eeprom;
5266 }
5267
5268 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
5269 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
5270
5271 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
5272 dev_err(&pdev->dev, "invalid MAC address\n");
5273 err = -EIO;
5274 goto err_eeprom;
5275 }
5276
5277 init_timer(&adapter->watchdog_timer);
5278 adapter->watchdog_timer.function = &ixgbe_watchdog;
5279 adapter->watchdog_timer.data = (unsigned long)adapter;
5280
5281 INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
5282 INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
5283
5284 err = ixgbe_init_interrupt_scheme(adapter);
5285 if (err)
5286 goto err_sw_init;
5287
5288 switch (pdev->device) {
5289 case IXGBE_DEV_ID_82599_KX4:
5290 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
5291 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
5292 /* Enable ACPI wakeup in GRC */
5293 IXGBE_WRITE_REG(hw, IXGBE_GRC,
5294 (IXGBE_READ_REG(hw, IXGBE_GRC) & ~IXGBE_GRC_APME));
5295 break;
5296 default:
5297 adapter->wol = 0;
5298 break;
5299 }
5300 device_init_wakeup(&adapter->pdev->dev, true);
5301 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
5302
5303 /* pick up the PCI bus settings for reporting later */
5304 hw->mac.ops.get_bus_info(hw);
5305
5306 /* print bus type/speed/width info */
5307 dev_info(&pdev->dev, "(PCI Express:%s:%s) %pM\n",
5308 ((hw->bus.speed == ixgbe_bus_speed_5000) ? "5.0Gb/s":
5309 (hw->bus.speed == ixgbe_bus_speed_2500) ? "2.5Gb/s":"Unknown"),
5310 ((hw->bus.width == ixgbe_bus_width_pcie_x8) ? "Width x8" :
5311 (hw->bus.width == ixgbe_bus_width_pcie_x4) ? "Width x4" :
5312 (hw->bus.width == ixgbe_bus_width_pcie_x1) ? "Width x1" :
5313 "Unknown"),
5314 netdev->dev_addr);
5315 ixgbe_read_pba_num_generic(hw, &part_num);
5316 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
5317 dev_info(&pdev->dev, "MAC: %d, PHY: %d, SFP+: %d, PBA No: %06x-%03x\n",
5318 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
5319 (part_num >> 8), (part_num & 0xff));
5320 else
5321 dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
5322 hw->mac.type, hw->phy.type,
5323 (part_num >> 8), (part_num & 0xff));
5324
5325 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
5326 dev_warn(&pdev->dev, "PCI-Express bandwidth available for "
5327 "this card is not sufficient for optimal "
5328 "performance.\n");
5329 dev_warn(&pdev->dev, "For optimal performance a x8 "
5330 "PCI-Express slot is required.\n");
5331 }
5332
5333 /* save off EEPROM version number */
5334 hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
5335
5336 /* reset the hardware with the new settings */
5337 hw->mac.ops.start_hw(hw);
5338
5339 strcpy(netdev->name, "eth%d");
5340 err = register_netdev(netdev);
5341 if (err)
5342 goto err_register;
5343
5344 /* carrier off reporting is important to ethtool even BEFORE open */
5345 netif_carrier_off(netdev);
5346
5347 #ifdef CONFIG_IXGBE_DCA
5348 if (dca_add_requester(&pdev->dev) == 0) {
5349 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
5350 ixgbe_setup_dca(adapter);
5351 }
5352 #endif
5353 /* add san mac addr to netdev */
5354 ixgbe_add_sanmac_netdev(netdev);
5355
5356 dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
5357 cards_found++;
5358 return 0;
5359
5360 err_register:
5361 ixgbe_release_hw_control(adapter);
5362 ixgbe_clear_interrupt_scheme(adapter);
5363 err_sw_init:
5364 err_eeprom:
5365 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5366 del_timer_sync(&adapter->sfp_timer);
5367 cancel_work_sync(&adapter->sfp_task);
5368 cancel_work_sync(&adapter->multispeed_fiber_task);
5369 cancel_work_sync(&adapter->sfp_config_module_task);
5370 iounmap(hw->hw_addr);
5371 err_ioremap:
5372 free_netdev(netdev);
5373 err_alloc_etherdev:
5374 pci_release_selected_regions(pdev, pci_select_bars(pdev,
5375 IORESOURCE_MEM));
5376 err_pci_reg:
5377 err_dma:
5378 pci_disable_device(pdev);
5379 return err;
5380 }
5381
5382 /**
5383 * ixgbe_remove - Device Removal Routine
5384 * @pdev: PCI device information struct
5385 *
5386 * ixgbe_remove is called by the PCI subsystem to alert the driver
5387 * that it should release a PCI device. The could be caused by a
5388 * Hot-Plug event, or because the driver is going to be removed from
5389 * memory.
5390 **/
5391 static void __devexit ixgbe_remove(struct pci_dev *pdev)
5392 {
5393 struct net_device *netdev = pci_get_drvdata(pdev);
5394 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5395 int err;
5396
5397 set_bit(__IXGBE_DOWN, &adapter->state);
5398 /* clear the module not found bit to make sure the worker won't
5399 * reschedule
5400 */
5401 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5402 del_timer_sync(&adapter->watchdog_timer);
5403
5404 del_timer_sync(&adapter->sfp_timer);
5405 cancel_work_sync(&adapter->watchdog_task);
5406 cancel_work_sync(&adapter->sfp_task);
5407 cancel_work_sync(&adapter->multispeed_fiber_task);
5408 cancel_work_sync(&adapter->sfp_config_module_task);
5409 flush_scheduled_work();
5410
5411 #ifdef CONFIG_IXGBE_DCA
5412 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
5413 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
5414 dca_remove_requester(&pdev->dev);
5415 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
5416 }
5417
5418 #endif
5419 #ifdef IXGBE_FCOE
5420 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
5421 ixgbe_cleanup_fcoe(adapter);
5422
5423 #endif /* IXGBE_FCOE */
5424
5425 /* remove the added san mac */
5426 ixgbe_del_sanmac_netdev(netdev);
5427
5428 if (netdev->reg_state == NETREG_REGISTERED)
5429 unregister_netdev(netdev);
5430
5431 ixgbe_clear_interrupt_scheme(adapter);
5432
5433 ixgbe_release_hw_control(adapter);
5434
5435 iounmap(adapter->hw.hw_addr);
5436 pci_release_selected_regions(pdev, pci_select_bars(pdev,
5437 IORESOURCE_MEM));
5438
5439 DPRINTK(PROBE, INFO, "complete\n");
5440
5441 free_netdev(netdev);
5442
5443 err = pci_disable_pcie_error_reporting(pdev);
5444 if (err)
5445 dev_err(&pdev->dev,
5446 "pci_disable_pcie_error_reporting failed 0x%x\n", err);
5447
5448 pci_disable_device(pdev);
5449 }
5450
5451 /**
5452 * ixgbe_io_error_detected - called when PCI error is detected
5453 * @pdev: Pointer to PCI device
5454 * @state: The current pci connection state
5455 *
5456 * This function is called after a PCI bus error affecting
5457 * this device has been detected.
5458 */
5459 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
5460 pci_channel_state_t state)
5461 {
5462 struct net_device *netdev = pci_get_drvdata(pdev);
5463 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5464
5465 netif_device_detach(netdev);
5466
5467 if (state == pci_channel_io_perm_failure)
5468 return PCI_ERS_RESULT_DISCONNECT;
5469
5470 if (netif_running(netdev))
5471 ixgbe_down(adapter);
5472 pci_disable_device(pdev);
5473
5474 /* Request a slot reset. */
5475 return PCI_ERS_RESULT_NEED_RESET;
5476 }
5477
5478 /**
5479 * ixgbe_io_slot_reset - called after the pci bus has been reset.
5480 * @pdev: Pointer to PCI device
5481 *
5482 * Restart the card from scratch, as if from a cold-boot.
5483 */
5484 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
5485 {
5486 struct net_device *netdev = pci_get_drvdata(pdev);
5487 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5488 pci_ers_result_t result;
5489 int err;
5490
5491 if (pci_enable_device_mem(pdev)) {
5492 DPRINTK(PROBE, ERR,
5493 "Cannot re-enable PCI device after reset.\n");
5494 result = PCI_ERS_RESULT_DISCONNECT;
5495 } else {
5496 pci_set_master(pdev);
5497 pci_restore_state(pdev);
5498
5499 pci_wake_from_d3(pdev, false);
5500
5501 ixgbe_reset(adapter);
5502 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5503 result = PCI_ERS_RESULT_RECOVERED;
5504 }
5505
5506 err = pci_cleanup_aer_uncorrect_error_status(pdev);
5507 if (err) {
5508 dev_err(&pdev->dev,
5509 "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n", err);
5510 /* non-fatal, continue */
5511 }
5512
5513 return result;
5514 }
5515
5516 /**
5517 * ixgbe_io_resume - called when traffic can start flowing again.
5518 * @pdev: Pointer to PCI device
5519 *
5520 * This callback is called when the error recovery driver tells us that
5521 * its OK to resume normal operation.
5522 */
5523 static void ixgbe_io_resume(struct pci_dev *pdev)
5524 {
5525 struct net_device *netdev = pci_get_drvdata(pdev);
5526 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5527
5528 if (netif_running(netdev)) {
5529 if (ixgbe_up(adapter)) {
5530 DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
5531 return;
5532 }
5533 }
5534
5535 netif_device_attach(netdev);
5536 }
5537
5538 static struct pci_error_handlers ixgbe_err_handler = {
5539 .error_detected = ixgbe_io_error_detected,
5540 .slot_reset = ixgbe_io_slot_reset,
5541 .resume = ixgbe_io_resume,
5542 };
5543
5544 static struct pci_driver ixgbe_driver = {
5545 .name = ixgbe_driver_name,
5546 .id_table = ixgbe_pci_tbl,
5547 .probe = ixgbe_probe,
5548 .remove = __devexit_p(ixgbe_remove),
5549 #ifdef CONFIG_PM
5550 .suspend = ixgbe_suspend,
5551 .resume = ixgbe_resume,
5552 #endif
5553 .shutdown = ixgbe_shutdown,
5554 .err_handler = &ixgbe_err_handler
5555 };
5556
5557 /**
5558 * ixgbe_init_module - Driver Registration Routine
5559 *
5560 * ixgbe_init_module is the first routine called when the driver is
5561 * loaded. All it does is register with the PCI subsystem.
5562 **/
5563 static int __init ixgbe_init_module(void)
5564 {
5565 int ret;
5566 printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
5567 ixgbe_driver_string, ixgbe_driver_version);
5568
5569 printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
5570
5571 #ifdef CONFIG_IXGBE_DCA
5572 dca_register_notify(&dca_notifier);
5573 #endif
5574
5575 ret = pci_register_driver(&ixgbe_driver);
5576 return ret;
5577 }
5578
5579 module_init(ixgbe_init_module);
5580
5581 /**
5582 * ixgbe_exit_module - Driver Exit Cleanup Routine
5583 *
5584 * ixgbe_exit_module is called just before the driver is removed
5585 * from memory.
5586 **/
5587 static void __exit ixgbe_exit_module(void)
5588 {
5589 #ifdef CONFIG_IXGBE_DCA
5590 dca_unregister_notify(&dca_notifier);
5591 #endif
5592 pci_unregister_driver(&ixgbe_driver);
5593 }
5594
5595 #ifdef CONFIG_IXGBE_DCA
5596 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
5597 void *p)
5598 {
5599 int ret_val;
5600
5601 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
5602 __ixgbe_notify_dca);
5603
5604 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
5605 }
5606
5607 #endif /* CONFIG_IXGBE_DCA */
5608 #ifdef DEBUG
5609 /**
5610 * ixgbe_get_hw_dev_name - return device name string
5611 * used by hardware layer to print debugging information
5612 **/
5613 char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw)
5614 {
5615 struct ixgbe_adapter *adapter = hw->back;
5616 return adapter->netdev->name;
5617 }
5618
5619 #endif
5620 module_exit(ixgbe_exit_module);
5621
5622 /* ixgbe_main.c */
kernel-based virtual machine