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Merge branch 'mini2440-dev-unlikely' into mini2440-dev
[linux-2.6/mini2440.git] / drivers / net / ixgbe / ixgbe_main.c
bloba5036f7c19230c75774a209d1a339f8643d02c53
1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2009 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26 *******************************************************************************/
27
28 #include <linux/types.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/netdevice.h>
32 #include <linux/vmalloc.h>
33 #include <linux/string.h>
34 #include <linux/in.h>
35 #include <linux/ip.h>
36 #include <linux/tcp.h>
37 #include <linux/pkt_sched.h>
38 #include <linux/ipv6.h>
39 #include <net/checksum.h>
40 #include <net/ip6_checksum.h>
41 #include <linux/ethtool.h>
42 #include <linux/if_vlan.h>
43 #include <scsi/fc/fc_fcoe.h>
44
45 #include "ixgbe.h"
46 #include "ixgbe_common.h"
47 #include "ixgbe_dcb_82599.h"
48
49 char ixgbe_driver_name[] = "ixgbe";
50 static const char ixgbe_driver_string[] =
51 "Intel(R) 10 Gigabit PCI Express Network Driver";
52
53 #define DRV_VERSION "2.0.44-k2"
54 const char ixgbe_driver_version[] = DRV_VERSION;
55 static char ixgbe_copyright[] = "Copyright (c) 1999-2009 Intel Corporation.";
56
57 static const struct ixgbe_info *ixgbe_info_tbl[] = {
58 [board_82598] = &ixgbe_82598_info,
59 [board_82599] = &ixgbe_82599_info,
60 };
61
62 /* ixgbe_pci_tbl - PCI Device ID Table
63 *
64 * Wildcard entries (PCI_ANY_ID) should come last
65 * Last entry must be all 0s
66 *
67 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
68 * Class, Class Mask, private data (not used) }
69 */
70 static struct pci_device_id ixgbe_pci_tbl[] = {
71 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598),
72 board_82598 },
73 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
74 board_82598 },
75 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
76 board_82598 },
77 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT),
78 board_82598 },
79 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2),
80 board_82598 },
81 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
82 board_82598 },
83 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT),
84 board_82598 },
85 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT),
86 board_82598 },
87 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM),
88 board_82598 },
89 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR),
90 board_82598 },
91 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM),
92 board_82598 },
93 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX),
94 board_82598 },
95 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4),
96 board_82599 },
97 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM),
98 board_82599 },
99 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP),
100 board_82599 },
101 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ),
102 board_82599 },
103 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4),
104 board_82599 },
105 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE),
106 board_82599 },
107
108 /* required last entry */
109 {0, }
110 };
111 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
112
113 #ifdef CONFIG_IXGBE_DCA
114 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
115 void *p);
116 static struct notifier_block dca_notifier = {
117 .notifier_call = ixgbe_notify_dca,
118 .next = NULL,
119 .priority = 0
120 };
121 #endif
122
123 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
124 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
125 MODULE_LICENSE("GPL");
126 MODULE_VERSION(DRV_VERSION);
127
128 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
129
130 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
131 {
132 u32 ctrl_ext;
133
134 /* Let firmware take over control of h/w */
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 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
141 {
142 u32 ctrl_ext;
143
144 /* Let firmware know the driver has taken over */
145 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
146 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
147 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
148 }
149
150 /*
151 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
152 * @adapter: pointer to adapter struct
153 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
154 * @queue: queue to map the corresponding interrupt to
155 * @msix_vector: the vector to map to the corresponding queue
156 *
157 */
158 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
159 u8 queue, u8 msix_vector)
160 {
161 u32 ivar, index;
162 struct ixgbe_hw *hw = &adapter->hw;
163 switch (hw->mac.type) {
164 case ixgbe_mac_82598EB:
165 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
166 if (direction == -1)
167 direction = 0;
168 index = (((direction * 64) + queue) >> 2) & 0x1F;
169 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
170 ivar &= ~(0xFF << (8 * (queue & 0x3)));
171 ivar |= (msix_vector << (8 * (queue & 0x3)));
172 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
173 break;
174 case ixgbe_mac_82599EB:
175 if (direction == -1) {
176 /* other causes */
177 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
178 index = ((queue & 1) * 8);
179 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
180 ivar &= ~(0xFF << index);
181 ivar |= (msix_vector << index);
182 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
183 break;
184 } else {
185 /* tx or rx causes */
186 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
187 index = ((16 * (queue & 1)) + (8 * direction));
188 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
189 ivar &= ~(0xFF << index);
190 ivar |= (msix_vector << index);
191 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
192 break;
193 }
194 default:
195 break;
196 }
197 }
198
199 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
200 u64 qmask)
201 {
202 u32 mask;
203
204 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
205 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
206 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
207 } else {
208 mask = (qmask & 0xFFFFFFFF);
209 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
210 mask = (qmask >> 32);
211 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
212 }
213 }
214
215 static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
216 struct ixgbe_tx_buffer
217 *tx_buffer_info)
218 {
219 tx_buffer_info->dma = 0;
220 if (tx_buffer_info->skb) {
221 skb_dma_unmap(&adapter->pdev->dev, tx_buffer_info->skb,
222 DMA_TO_DEVICE);
223 dev_kfree_skb_any(tx_buffer_info->skb);
224 tx_buffer_info->skb = NULL;
225 }
226 tx_buffer_info->time_stamp = 0;
227 /* tx_buffer_info must be completely set up in the transmit path */
228 }
229
230 /**
231 * ixgbe_tx_is_paused - check if the tx ring is paused
232 * @adapter: the ixgbe adapter
233 * @tx_ring: the corresponding tx_ring
234 *
235 * If not in DCB mode, checks TFCS.TXOFF, otherwise, find out the
236 * corresponding TC of this tx_ring when checking TFCS.
237 *
238 * Returns : true if paused
239 */
240 static inline bool ixgbe_tx_is_paused(struct ixgbe_adapter *adapter,
241 struct ixgbe_ring *tx_ring)
242 {
243 int tc;
244 u32 txoff = IXGBE_TFCS_TXOFF;
245
246 #ifdef CONFIG_IXGBE_DCB
247 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
248 int reg_idx = tx_ring->reg_idx;
249 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
250
251 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
252 tc = reg_idx >> 2;
253 txoff = IXGBE_TFCS_TXOFF0;
254 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
255 tc = 0;
256 txoff = IXGBE_TFCS_TXOFF;
257 if (dcb_i == 8) {
258 /* TC0, TC1 */
259 tc = reg_idx >> 5;
260 if (tc == 2) /* TC2, TC3 */
261 tc += (reg_idx - 64) >> 4;
262 else if (tc == 3) /* TC4, TC5, TC6, TC7 */
263 tc += 1 + ((reg_idx - 96) >> 3);
264 } else if (dcb_i == 4) {
265 /* TC0, TC1 */
266 tc = reg_idx >> 6;
267 if (tc == 1) {
268 tc += (reg_idx - 64) >> 5;
269 if (tc == 2) /* TC2, TC3 */
270 tc += (reg_idx - 96) >> 4;
271 }
272 }
273 }
274 txoff <<= tc;
275 }
276 #endif
277 return IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & txoff;
278 }
279
280 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
281 struct ixgbe_ring *tx_ring,
282 unsigned int eop)
283 {
284 struct ixgbe_hw *hw = &adapter->hw;
285
286 /* Detect a transmit hang in hardware, this serializes the
287 * check with the clearing of time_stamp and movement of eop */
288 adapter->detect_tx_hung = false;
289 if (tx_ring->tx_buffer_info[eop].time_stamp &&
290 time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
291 !ixgbe_tx_is_paused(adapter, tx_ring)) {
292 /* detected Tx unit hang */
293 union ixgbe_adv_tx_desc *tx_desc;
294 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
295 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
296 " Tx Queue <%d>\n"
297 " TDH, TDT <%x>, <%x>\n"
298 " next_to_use <%x>\n"
299 " next_to_clean <%x>\n"
300 "tx_buffer_info[next_to_clean]\n"
301 " time_stamp <%lx>\n"
302 " jiffies <%lx>\n",
303 tx_ring->queue_index,
304 IXGBE_READ_REG(hw, tx_ring->head),
305 IXGBE_READ_REG(hw, tx_ring->tail),
306 tx_ring->next_to_use, eop,
307 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
308 return true;
309 }
310
311 return false;
312 }
313
314 #define IXGBE_MAX_TXD_PWR 14
315 #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
316
317 /* Tx Descriptors needed, worst case */
318 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
319 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
320 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
321 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
322
323 static void ixgbe_tx_timeout(struct net_device *netdev);
324
325 /**
326 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
327 * @q_vector: structure containing interrupt and ring information
328 * @tx_ring: tx ring to clean
329 **/
330 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
331 struct ixgbe_ring *tx_ring)
332 {
333 struct ixgbe_adapter *adapter = q_vector->adapter;
334 struct net_device *netdev = adapter->netdev;
335 union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
336 struct ixgbe_tx_buffer *tx_buffer_info;
337 unsigned int i, eop, count = 0;
338 unsigned int total_bytes = 0, total_packets = 0;
339
340 i = tx_ring->next_to_clean;
341 eop = tx_ring->tx_buffer_info[i].next_to_watch;
342 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
343
344 while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
345 (count < tx_ring->work_limit)) {
346 bool cleaned = false;
347 for ( ; !cleaned; count++) {
348 struct sk_buff *skb;
349 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
350 tx_buffer_info = &tx_ring->tx_buffer_info[i];
351 cleaned = (i == eop);
352 skb = tx_buffer_info->skb;
353
354 if (cleaned && skb) {
355 unsigned int segs, bytecount;
356 unsigned int hlen = skb_headlen(skb);
357
358 /* gso_segs is currently only valid for tcp */
359 segs = skb_shinfo(skb)->gso_segs ?: 1;
360 #ifdef IXGBE_FCOE
361 /* adjust for FCoE Sequence Offload */
362 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
363 && (skb->protocol == htons(ETH_P_FCOE)) &&
364 skb_is_gso(skb)) {
365 hlen = skb_transport_offset(skb) +
366 sizeof(struct fc_frame_header) +
367 sizeof(struct fcoe_crc_eof);
368 segs = DIV_ROUND_UP(skb->len - hlen,
369 skb_shinfo(skb)->gso_size);
370 }
371 #endif /* IXGBE_FCOE */
372 /* multiply data chunks by size of headers */
373 bytecount = ((segs - 1) * hlen) + skb->len;
374 total_packets += segs;
375 total_bytes += bytecount;
376 }
377
378 ixgbe_unmap_and_free_tx_resource(adapter,
379 tx_buffer_info);
380
381 tx_desc->wb.status = 0;
382
383 i++;
384 if (i == tx_ring->count)
385 i = 0;
386 }
387
388 eop = tx_ring->tx_buffer_info[i].next_to_watch;
389 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
390 }
391
392 tx_ring->next_to_clean = i;
393
394 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
395 if (unlikely(count && netif_carrier_ok(netdev) &&
396 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
397 /* Make sure that anybody stopping the queue after this
398 * sees the new next_to_clean.
399 */
400 smp_mb();
401 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
402 !test_bit(__IXGBE_DOWN, &adapter->state)) {
403 netif_wake_subqueue(netdev, tx_ring->queue_index);
404 ++adapter->restart_queue;
405 }
406 }
407
408 if (adapter->detect_tx_hung) {
409 if (ixgbe_check_tx_hang(adapter, tx_ring, i)) {
410 /* schedule immediate reset if we believe we hung */
411 DPRINTK(PROBE, INFO,
412 "tx hang %d detected, resetting adapter\n",
413 adapter->tx_timeout_count + 1);
414 ixgbe_tx_timeout(adapter->netdev);
415 }
416 }
417
418 /* re-arm the interrupt */
419 if (count >= tx_ring->work_limit)
420 ixgbe_irq_rearm_queues(adapter, ((u64)1 << q_vector->v_idx));
421
422 tx_ring->total_bytes += total_bytes;
423 tx_ring->total_packets += total_packets;
424 tx_ring->stats.packets += total_packets;
425 tx_ring->stats.bytes += total_bytes;
426 adapter->net_stats.tx_bytes += total_bytes;
427 adapter->net_stats.tx_packets += total_packets;
428 return (count < tx_ring->work_limit);
429 }
430
431 #ifdef CONFIG_IXGBE_DCA
432 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
433 struct ixgbe_ring *rx_ring)
434 {
435 u32 rxctrl;
436 int cpu = get_cpu();
437 int q = rx_ring - adapter->rx_ring;
438
439 if (rx_ring->cpu != cpu) {
440 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
441 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
442 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
443 rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
444 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
445 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
446 rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
447 IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
448 }
449 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
450 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
451 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
452 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_WRO_EN |
453 IXGBE_DCA_RXCTRL_DESC_HSRO_EN);
454 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
455 rx_ring->cpu = cpu;
456 }
457 put_cpu();
458 }
459
460 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
461 struct ixgbe_ring *tx_ring)
462 {
463 u32 txctrl;
464 int cpu = get_cpu();
465 int q = tx_ring - adapter->tx_ring;
466 struct ixgbe_hw *hw = &adapter->hw;
467
468 if (tx_ring->cpu != cpu) {
469 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
470 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(q));
471 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
472 txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
473 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
474 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(q), txctrl);
475 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
476 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(q));
477 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
478 txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
479 IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
480 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
481 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(q), txctrl);
482 }
483 tx_ring->cpu = cpu;
484 }
485 put_cpu();
486 }
487
488 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
489 {
490 int i;
491
492 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
493 return;
494
495 /* always use CB2 mode, difference is masked in the CB driver */
496 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
497
498 for (i = 0; i < adapter->num_tx_queues; i++) {
499 adapter->tx_ring[i].cpu = -1;
500 ixgbe_update_tx_dca(adapter, &adapter->tx_ring[i]);
501 }
502 for (i = 0; i < adapter->num_rx_queues; i++) {
503 adapter->rx_ring[i].cpu = -1;
504 ixgbe_update_rx_dca(adapter, &adapter->rx_ring[i]);
505 }
506 }
507
508 static int __ixgbe_notify_dca(struct device *dev, void *data)
509 {
510 struct net_device *netdev = dev_get_drvdata(dev);
511 struct ixgbe_adapter *adapter = netdev_priv(netdev);
512 unsigned long event = *(unsigned long *)data;
513
514 switch (event) {
515 case DCA_PROVIDER_ADD:
516 /* if we're already enabled, don't do it again */
517 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
518 break;
519 if (dca_add_requester(dev) == 0) {
520 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
521 ixgbe_setup_dca(adapter);
522 break;
523 }
524 /* Fall Through since DCA is disabled. */
525 case DCA_PROVIDER_REMOVE:
526 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
527 dca_remove_requester(dev);
528 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
529 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
530 }
531 break;
532 }
533
534 return 0;
535 }
536
537 #endif /* CONFIG_IXGBE_DCA */
538 /**
539 * ixgbe_receive_skb - Send a completed packet up the stack
540 * @adapter: board private structure
541 * @skb: packet to send up
542 * @status: hardware indication of status of receive
543 * @rx_ring: rx descriptor ring (for a specific queue) to setup
544 * @rx_desc: rx descriptor
545 **/
546 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
547 struct sk_buff *skb, u8 status,
548 struct ixgbe_ring *ring,
549 union ixgbe_adv_rx_desc *rx_desc)
550 {
551 struct ixgbe_adapter *adapter = q_vector->adapter;
552 struct napi_struct *napi = &q_vector->napi;
553 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
554 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
555
556 skb_record_rx_queue(skb, ring->queue_index);
557 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
558 if (adapter->vlgrp && is_vlan && (tag & VLAN_VID_MASK))
559 vlan_gro_receive(napi, adapter->vlgrp, tag, skb);
560 else
561 napi_gro_receive(napi, skb);
562 } else {
563 if (adapter->vlgrp && is_vlan && (tag & VLAN_VID_MASK))
564 vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
565 else
566 netif_rx(skb);
567 }
568 }
569
570 /**
571 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
572 * @adapter: address of board private structure
573 * @status_err: hardware indication of status of receive
574 * @skb: skb currently being received and modified
575 **/
576 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
577 union ixgbe_adv_rx_desc *rx_desc,
578 struct sk_buff *skb)
579 {
580 u32 status_err = le32_to_cpu(rx_desc->wb.upper.status_error);
581
582 skb->ip_summed = CHECKSUM_NONE;
583
584 /* Rx csum disabled */
585 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
586 return;
587
588 /* if IP and error */
589 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
590 (status_err & IXGBE_RXDADV_ERR_IPE)) {
591 adapter->hw_csum_rx_error++;
592 return;
593 }
594
595 if (!(status_err & IXGBE_RXD_STAT_L4CS))
596 return;
597
598 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
599 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
600
601 /*
602 * 82599 errata, UDP frames with a 0 checksum can be marked as
603 * checksum errors.
604 */
605 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
606 (adapter->hw.mac.type == ixgbe_mac_82599EB))
607 return;
608
609 adapter->hw_csum_rx_error++;
610 return;
611 }
612
613 /* It must be a TCP or UDP packet with a valid checksum */
614 skb->ip_summed = CHECKSUM_UNNECESSARY;
615 adapter->hw_csum_rx_good++;
616 }
617
618 static inline void ixgbe_release_rx_desc(struct ixgbe_hw *hw,
619 struct ixgbe_ring *rx_ring, u32 val)
620 {
621 /*
622 * Force memory writes to complete before letting h/w
623 * know there are new descriptors to fetch. (Only
624 * applicable for weak-ordered memory model archs,
625 * such as IA-64).
626 */
627 wmb();
628 IXGBE_WRITE_REG(hw, IXGBE_RDT(rx_ring->reg_idx), val);
629 }
630
631 /**
632 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
633 * @adapter: address of board private structure
634 **/
635 static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
636 struct ixgbe_ring *rx_ring,
637 int cleaned_count)
638 {
639 struct pci_dev *pdev = adapter->pdev;
640 union ixgbe_adv_rx_desc *rx_desc;
641 struct ixgbe_rx_buffer *bi;
642 unsigned int i;
643
644 i = rx_ring->next_to_use;
645 bi = &rx_ring->rx_buffer_info[i];
646
647 while (cleaned_count--) {
648 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
649
650 if (!bi->page_dma &&
651 (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)) {
652 if (!bi->page) {
653 bi->page = alloc_page(GFP_ATOMIC);
654 if (!bi->page) {
655 adapter->alloc_rx_page_failed++;
656 goto no_buffers;
657 }
658 bi->page_offset = 0;
659 } else {
660 /* use a half page if we're re-using */
661 bi->page_offset ^= (PAGE_SIZE / 2);
662 }
663
664 bi->page_dma = pci_map_page(pdev, bi->page,
665 bi->page_offset,
666 (PAGE_SIZE / 2),
667 PCI_DMA_FROMDEVICE);
668 }
669
670 if (!bi->skb) {
671 struct sk_buff *skb;
672 skb = netdev_alloc_skb(adapter->netdev,
673 (rx_ring->rx_buf_len +
674 NET_IP_ALIGN));
675
676 if (!skb) {
677 adapter->alloc_rx_buff_failed++;
678 goto no_buffers;
679 }
680
681 /*
682 * Make buffer alignment 2 beyond a 16 byte boundary
683 * this will result in a 16 byte aligned IP header after
684 * the 14 byte MAC header is removed
685 */
686 skb_reserve(skb, NET_IP_ALIGN);
687
688 bi->skb = skb;
689 bi->dma = pci_map_single(pdev, skb->data,
690 rx_ring->rx_buf_len,
691 PCI_DMA_FROMDEVICE);
692 }
693 /* Refresh the desc even if buffer_addrs didn't change because
694 * each write-back erases this info. */
695 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
696 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
697 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
698 } else {
699 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
700 }
701
702 i++;
703 if (i == rx_ring->count)
704 i = 0;
705 bi = &rx_ring->rx_buffer_info[i];
706 }
707
708 no_buffers:
709 if (rx_ring->next_to_use != i) {
710 rx_ring->next_to_use = i;
711 if (i-- == 0)
712 i = (rx_ring->count - 1);
713
714 ixgbe_release_rx_desc(&adapter->hw, rx_ring, i);
715 }
716 }
717
718 static inline u16 ixgbe_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
719 {
720 return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
721 }
722
723 static inline u16 ixgbe_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
724 {
725 return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
726 }
727
728 static inline u32 ixgbe_get_rsc_count(union ixgbe_adv_rx_desc *rx_desc)
729 {
730 return (le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
731 IXGBE_RXDADV_RSCCNT_MASK) >>
732 IXGBE_RXDADV_RSCCNT_SHIFT;
733 }
734
735 /**
736 * ixgbe_transform_rsc_queue - change rsc queue into a full packet
737 * @skb: pointer to the last skb in the rsc queue
738 *
739 * This function changes a queue full of hw rsc buffers into a completed
740 * packet. It uses the ->prev pointers to find the first packet and then
741 * turns it into the frag list owner.
742 **/
743 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb)
744 {
745 unsigned int frag_list_size = 0;
746
747 while (skb->prev) {
748 struct sk_buff *prev = skb->prev;
749 frag_list_size += skb->len;
750 skb->prev = NULL;
751 skb = prev;
752 }
753
754 skb_shinfo(skb)->frag_list = skb->next;
755 skb->next = NULL;
756 skb->len += frag_list_size;
757 skb->data_len += frag_list_size;
758 skb->truesize += frag_list_size;
759 return skb;
760 }
761
762 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
763 struct ixgbe_ring *rx_ring,
764 int *work_done, int work_to_do)
765 {
766 struct ixgbe_adapter *adapter = q_vector->adapter;
767 struct pci_dev *pdev = adapter->pdev;
768 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
769 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
770 struct sk_buff *skb;
771 unsigned int i, rsc_count = 0;
772 u32 len, staterr;
773 u16 hdr_info;
774 bool cleaned = false;
775 int cleaned_count = 0;
776 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
777 #ifdef IXGBE_FCOE
778 int ddp_bytes = 0;
779 #endif /* IXGBE_FCOE */
780
781 i = rx_ring->next_to_clean;
782 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
783 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
784 rx_buffer_info = &rx_ring->rx_buffer_info[i];
785
786 while (staterr & IXGBE_RXD_STAT_DD) {
787 u32 upper_len = 0;
788 if (*work_done >= work_to_do)
789 break;
790 (*work_done)++;
791
792 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
793 hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
794 len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
795 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
796 if (hdr_info & IXGBE_RXDADV_SPH)
797 adapter->rx_hdr_split++;
798 if (len > IXGBE_RX_HDR_SIZE)
799 len = IXGBE_RX_HDR_SIZE;
800 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
801 } else {
802 len = le16_to_cpu(rx_desc->wb.upper.length);
803 }
804
805 cleaned = true;
806 skb = rx_buffer_info->skb;
807 prefetch(skb->data - NET_IP_ALIGN);
808 rx_buffer_info->skb = NULL;
809
810 if (rx_buffer_info->dma) {
811 pci_unmap_single(pdev, rx_buffer_info->dma,
812 rx_ring->rx_buf_len,
813 PCI_DMA_FROMDEVICE);
814 rx_buffer_info->dma = 0;
815 skb_put(skb, len);
816 }
817
818 if (upper_len) {
819 pci_unmap_page(pdev, rx_buffer_info->page_dma,
820 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
821 rx_buffer_info->page_dma = 0;
822 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
823 rx_buffer_info->page,
824 rx_buffer_info->page_offset,
825 upper_len);
826
827 if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
828 (page_count(rx_buffer_info->page) != 1))
829 rx_buffer_info->page = NULL;
830 else
831 get_page(rx_buffer_info->page);
832
833 skb->len += upper_len;
834 skb->data_len += upper_len;
835 skb->truesize += upper_len;
836 }
837
838 i++;
839 if (i == rx_ring->count)
840 i = 0;
841
842 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
843 prefetch(next_rxd);
844 cleaned_count++;
845
846 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
847 rsc_count = ixgbe_get_rsc_count(rx_desc);
848
849 if (rsc_count) {
850 u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
851 IXGBE_RXDADV_NEXTP_SHIFT;
852 next_buffer = &rx_ring->rx_buffer_info[nextp];
853 rx_ring->rsc_count += (rsc_count - 1);
854 } else {
855 next_buffer = &rx_ring->rx_buffer_info[i];
856 }
857
858 if (staterr & IXGBE_RXD_STAT_EOP) {
859 if (skb->prev)
860 skb = ixgbe_transform_rsc_queue(skb);
861 rx_ring->stats.packets++;
862 rx_ring->stats.bytes += skb->len;
863 } else {
864 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
865 rx_buffer_info->skb = next_buffer->skb;
866 rx_buffer_info->dma = next_buffer->dma;
867 next_buffer->skb = skb;
868 next_buffer->dma = 0;
869 } else {
870 skb->next = next_buffer->skb;
871 skb->next->prev = skb;
872 }
873 adapter->non_eop_descs++;
874 goto next_desc;
875 }
876
877 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
878 dev_kfree_skb_irq(skb);
879 goto next_desc;
880 }
881
882 ixgbe_rx_checksum(adapter, rx_desc, skb);
883
884 /* probably a little skewed due to removing CRC */
885 total_rx_bytes += skb->len;
886 total_rx_packets++;
887
888 skb->protocol = eth_type_trans(skb, adapter->netdev);
889 #ifdef IXGBE_FCOE
890 /* if ddp, not passing to ULD unless for FCP_RSP or error */
891 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
892 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
893 if (!ddp_bytes)
894 goto next_desc;
895 }
896 #endif /* IXGBE_FCOE */
897 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
898
899 next_desc:
900 rx_desc->wb.upper.status_error = 0;
901
902 /* return some buffers to hardware, one at a time is too slow */
903 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
904 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
905 cleaned_count = 0;
906 }
907
908 /* use prefetched values */
909 rx_desc = next_rxd;
910 rx_buffer_info = &rx_ring->rx_buffer_info[i];
911
912 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
913 }
914
915 rx_ring->next_to_clean = i;
916 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
917
918 if (cleaned_count)
919 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
920
921 #ifdef IXGBE_FCOE
922 /* include DDPed FCoE data */
923 if (ddp_bytes > 0) {
924 unsigned int mss;
925
926 mss = adapter->netdev->mtu - sizeof(struct fcoe_hdr) -
927 sizeof(struct fc_frame_header) -
928 sizeof(struct fcoe_crc_eof);
929 if (mss > 512)
930 mss &= ~511;
931 total_rx_bytes += ddp_bytes;
932 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
933 }
934 #endif /* IXGBE_FCOE */
935
936 rx_ring->total_packets += total_rx_packets;
937 rx_ring->total_bytes += total_rx_bytes;
938 adapter->net_stats.rx_bytes += total_rx_bytes;
939 adapter->net_stats.rx_packets += total_rx_packets;
940
941 return cleaned;
942 }
943
944 static int ixgbe_clean_rxonly(struct napi_struct *, int);
945 /**
946 * ixgbe_configure_msix - Configure MSI-X hardware
947 * @adapter: board private structure
948 *
949 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
950 * interrupts.
951 **/
952 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
953 {
954 struct ixgbe_q_vector *q_vector;
955 int i, j, q_vectors, v_idx, r_idx;
956 u32 mask;
957
958 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
959
960 /*
961 * Populate the IVAR table and set the ITR values to the
962 * corresponding register.
963 */
964 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
965 q_vector = adapter->q_vector[v_idx];
966 /* XXX for_each_bit(...) */
967 r_idx = find_first_bit(q_vector->rxr_idx,
968 adapter->num_rx_queues);
969
970 for (i = 0; i < q_vector->rxr_count; i++) {
971 j = adapter->rx_ring[r_idx].reg_idx;
972 ixgbe_set_ivar(adapter, 0, j, v_idx);
973 r_idx = find_next_bit(q_vector->rxr_idx,
974 adapter->num_rx_queues,
975 r_idx + 1);
976 }
977 r_idx = find_first_bit(q_vector->txr_idx,
978 adapter->num_tx_queues);
979
980 for (i = 0; i < q_vector->txr_count; i++) {
981 j = adapter->tx_ring[r_idx].reg_idx;
982 ixgbe_set_ivar(adapter, 1, j, v_idx);
983 r_idx = find_next_bit(q_vector->txr_idx,
984 adapter->num_tx_queues,
985 r_idx + 1);
986 }
987
988 if (q_vector->txr_count && !q_vector->rxr_count)
989 /* tx only */
990 q_vector->eitr = adapter->tx_eitr_param;
991 else if (q_vector->rxr_count)
992 /* rx or mixed */
993 q_vector->eitr = adapter->rx_eitr_param;
994
995 ixgbe_write_eitr(q_vector);
996 }
997
998 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
999 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
1000 v_idx);
1001 else if (adapter->hw.mac.type == ixgbe_mac_82599EB)
1002 ixgbe_set_ivar(adapter, -1, 1, v_idx);
1003 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
1004
1005 /* set up to autoclear timer, and the vectors */
1006 mask = IXGBE_EIMS_ENABLE_MASK;
1007 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
1008 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
1009 }
1010
1011 enum latency_range {
1012 lowest_latency = 0,
1013 low_latency = 1,
1014 bulk_latency = 2,
1015 latency_invalid = 255
1016 };
1017
1018 /**
1019 * ixgbe_update_itr - update the dynamic ITR value based on statistics
1020 * @adapter: pointer to adapter
1021 * @eitr: eitr setting (ints per sec) to give last timeslice
1022 * @itr_setting: current throttle rate in ints/second
1023 * @packets: the number of packets during this measurement interval
1024 * @bytes: the number of bytes during this measurement interval
1025 *
1026 * Stores a new ITR value based on packets and byte
1027 * counts during the last interrupt. The advantage of per interrupt
1028 * computation is faster updates and more accurate ITR for the current
1029 * traffic pattern. Constants in this function were computed
1030 * based on theoretical maximum wire speed and thresholds were set based
1031 * on testing data as well as attempting to minimize response time
1032 * while increasing bulk throughput.
1033 * this functionality is controlled by the InterruptThrottleRate module
1034 * parameter (see ixgbe_param.c)
1035 **/
1036 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
1037 u32 eitr, u8 itr_setting,
1038 int packets, int bytes)
1039 {
1040 unsigned int retval = itr_setting;
1041 u32 timepassed_us;
1042 u64 bytes_perint;
1043
1044 if (packets == 0)
1045 goto update_itr_done;
1046
1047
1048 /* simple throttlerate management
1049 * 0-20MB/s lowest (100000 ints/s)
1050 * 20-100MB/s low (20000 ints/s)
1051 * 100-1249MB/s bulk (8000 ints/s)
1052 */
1053 /* what was last interrupt timeslice? */
1054 timepassed_us = 1000000/eitr;
1055 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1056
1057 switch (itr_setting) {
1058 case lowest_latency:
1059 if (bytes_perint > adapter->eitr_low)
1060 retval = low_latency;
1061 break;
1062 case low_latency:
1063 if (bytes_perint > adapter->eitr_high)
1064 retval = bulk_latency;
1065 else if (bytes_perint <= adapter->eitr_low)
1066 retval = lowest_latency;
1067 break;
1068 case bulk_latency:
1069 if (bytes_perint <= adapter->eitr_high)
1070 retval = low_latency;
1071 break;
1072 }
1073
1074 update_itr_done:
1075 return retval;
1076 }
1077
1078 /**
1079 * ixgbe_write_eitr - write EITR register in hardware specific way
1080 * @q_vector: structure containing interrupt and ring information
1081 *
1082 * This function is made to be called by ethtool and by the driver
1083 * when it needs to update EITR registers at runtime. Hardware
1084 * specific quirks/differences are taken care of here.
1085 */
1086 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1087 {
1088 struct ixgbe_adapter *adapter = q_vector->adapter;
1089 struct ixgbe_hw *hw = &adapter->hw;
1090 int v_idx = q_vector->v_idx;
1091 u32 itr_reg = EITR_INTS_PER_SEC_TO_REG(q_vector->eitr);
1092
1093 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1094 /* must write high and low 16 bits to reset counter */
1095 itr_reg |= (itr_reg << 16);
1096 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1097 /*
1098 * set the WDIS bit to not clear the timer bits and cause an
1099 * immediate assertion of the interrupt
1100 */
1101 itr_reg |= IXGBE_EITR_CNT_WDIS;
1102 }
1103 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1104 }
1105
1106 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
1107 {
1108 struct ixgbe_adapter *adapter = q_vector->adapter;
1109 u32 new_itr;
1110 u8 current_itr, ret_itr;
1111 int i, r_idx;
1112 struct ixgbe_ring *rx_ring, *tx_ring;
1113
1114 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1115 for (i = 0; i < q_vector->txr_count; i++) {
1116 tx_ring = &(adapter->tx_ring[r_idx]);
1117 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1118 q_vector->tx_itr,
1119 tx_ring->total_packets,
1120 tx_ring->total_bytes);
1121 /* if the result for this queue would decrease interrupt
1122 * rate for this vector then use that result */
1123 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
1124 q_vector->tx_itr - 1 : ret_itr);
1125 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1126 r_idx + 1);
1127 }
1128
1129 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1130 for (i = 0; i < q_vector->rxr_count; i++) {
1131 rx_ring = &(adapter->rx_ring[r_idx]);
1132 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1133 q_vector->rx_itr,
1134 rx_ring->total_packets,
1135 rx_ring->total_bytes);
1136 /* if the result for this queue would decrease interrupt
1137 * rate for this vector then use that result */
1138 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
1139 q_vector->rx_itr - 1 : ret_itr);
1140 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1141 r_idx + 1);
1142 }
1143
1144 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1145
1146 switch (current_itr) {
1147 /* counts and packets in update_itr are dependent on these numbers */
1148 case lowest_latency:
1149 new_itr = 100000;
1150 break;
1151 case low_latency:
1152 new_itr = 20000; /* aka hwitr = ~200 */
1153 break;
1154 case bulk_latency:
1155 default:
1156 new_itr = 8000;
1157 break;
1158 }
1159
1160 if (new_itr != q_vector->eitr) {
1161 /* do an exponential smoothing */
1162 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1163
1164 /* save the algorithm value here, not the smoothed one */
1165 q_vector->eitr = new_itr;
1166
1167 ixgbe_write_eitr(q_vector);
1168 }
1169
1170 return;
1171 }
1172
1173 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1174 {
1175 struct ixgbe_hw *hw = &adapter->hw;
1176
1177 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1178 (eicr & IXGBE_EICR_GPI_SDP1)) {
1179 DPRINTK(PROBE, CRIT, "Fan has stopped, replace the adapter\n");
1180 /* write to clear the interrupt */
1181 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1182 }
1183 }
1184
1185 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1186 {
1187 struct ixgbe_hw *hw = &adapter->hw;
1188
1189 if (eicr & IXGBE_EICR_GPI_SDP1) {
1190 /* Clear the interrupt */
1191 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1192 schedule_work(&adapter->multispeed_fiber_task);
1193 } else if (eicr & IXGBE_EICR_GPI_SDP2) {
1194 /* Clear the interrupt */
1195 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1196 schedule_work(&adapter->sfp_config_module_task);
1197 } else {
1198 /* Interrupt isn't for us... */
1199 return;
1200 }
1201 }
1202
1203 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1204 {
1205 struct ixgbe_hw *hw = &adapter->hw;
1206
1207 adapter->lsc_int++;
1208 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1209 adapter->link_check_timeout = jiffies;
1210 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1211 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1212 schedule_work(&adapter->watchdog_task);
1213 }
1214 }
1215
1216 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1217 {
1218 struct net_device *netdev = data;
1219 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1220 struct ixgbe_hw *hw = &adapter->hw;
1221 u32 eicr;
1222
1223 /*
1224 * Workaround for Silicon errata. Use clear-by-write instead
1225 * of clear-by-read. Reading with EICS will return the
1226 * interrupt causes without clearing, which later be done
1227 * with the write to EICR.
1228 */
1229 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1230 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1231
1232 if (eicr & IXGBE_EICR_LSC)
1233 ixgbe_check_lsc(adapter);
1234
1235 if (hw->mac.type == ixgbe_mac_82598EB)
1236 ixgbe_check_fan_failure(adapter, eicr);
1237
1238 if (hw->mac.type == ixgbe_mac_82599EB) {
1239 ixgbe_check_sfp_event(adapter, eicr);
1240
1241 /* Handle Flow Director Full threshold interrupt */
1242 if (eicr & IXGBE_EICR_FLOW_DIR) {
1243 int i;
1244 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_FLOW_DIR);
1245 /* Disable transmits before FDIR Re-initialization */
1246 netif_tx_stop_all_queues(netdev);
1247 for (i = 0; i < adapter->num_tx_queues; i++) {
1248 struct ixgbe_ring *tx_ring =
1249 &adapter->tx_ring[i];
1250 if (test_and_clear_bit(__IXGBE_FDIR_INIT_DONE,
1251 &tx_ring->reinit_state))
1252 schedule_work(&adapter->fdir_reinit_task);
1253 }
1254 }
1255 }
1256 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1257 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
1258
1259 return IRQ_HANDLED;
1260 }
1261
1262 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1263 u64 qmask)
1264 {
1265 u32 mask;
1266
1267 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1268 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1269 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1270 } else {
1271 mask = (qmask & 0xFFFFFFFF);
1272 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(0), mask);
1273 mask = (qmask >> 32);
1274 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(1), mask);
1275 }
1276 /* skip the flush */
1277 }
1278
1279 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1280 u64 qmask)
1281 {
1282 u32 mask;
1283
1284 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1285 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1286 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, mask);
1287 } else {
1288 mask = (qmask & 0xFFFFFFFF);
1289 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), mask);
1290 mask = (qmask >> 32);
1291 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), mask);
1292 }
1293 /* skip the flush */
1294 }
1295
1296 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
1297 {
1298 struct ixgbe_q_vector *q_vector = data;
1299 struct ixgbe_adapter *adapter = q_vector->adapter;
1300 struct ixgbe_ring *tx_ring;
1301 int i, r_idx;
1302
1303 if (!q_vector->txr_count)
1304 return IRQ_HANDLED;
1305
1306 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1307 for (i = 0; i < q_vector->txr_count; i++) {
1308 tx_ring = &(adapter->tx_ring[r_idx]);
1309 tx_ring->total_bytes = 0;
1310 tx_ring->total_packets = 0;
1311 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1312 r_idx + 1);
1313 }
1314
1315 /* disable interrupts on this vector only */
1316 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1317 napi_schedule(&q_vector->napi);
1318
1319 return IRQ_HANDLED;
1320 }
1321
1322 /**
1323 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
1324 * @irq: unused
1325 * @data: pointer to our q_vector struct for this interrupt vector
1326 **/
1327 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
1328 {
1329 struct ixgbe_q_vector *q_vector = data;
1330 struct ixgbe_adapter *adapter = q_vector->adapter;
1331 struct ixgbe_ring *rx_ring;
1332 int r_idx;
1333 int i;
1334
1335 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1336 for (i = 0; i < q_vector->rxr_count; i++) {
1337 rx_ring = &(adapter->rx_ring[r_idx]);
1338 rx_ring->total_bytes = 0;
1339 rx_ring->total_packets = 0;
1340 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1341 r_idx + 1);
1342 }
1343
1344 if (!q_vector->rxr_count)
1345 return IRQ_HANDLED;
1346
1347 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1348 rx_ring = &(adapter->rx_ring[r_idx]);
1349 /* disable interrupts on this vector only */
1350 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1351 napi_schedule(&q_vector->napi);
1352
1353 return IRQ_HANDLED;
1354 }
1355
1356 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1357 {
1358 struct ixgbe_q_vector *q_vector = data;
1359 struct ixgbe_adapter *adapter = q_vector->adapter;
1360 struct ixgbe_ring *ring;
1361 int r_idx;
1362 int i;
1363
1364 if (!q_vector->txr_count && !q_vector->rxr_count)
1365 return IRQ_HANDLED;
1366
1367 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1368 for (i = 0; i < q_vector->txr_count; i++) {
1369 ring = &(adapter->tx_ring[r_idx]);
1370 ring->total_bytes = 0;
1371 ring->total_packets = 0;
1372 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1373 r_idx + 1);
1374 }
1375
1376 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1377 for (i = 0; i < q_vector->rxr_count; i++) {
1378 ring = &(adapter->rx_ring[r_idx]);
1379 ring->total_bytes = 0;
1380 ring->total_packets = 0;
1381 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1382 r_idx + 1);
1383 }
1384
1385 /* disable interrupts on this vector only */
1386 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1387 napi_schedule(&q_vector->napi);
1388
1389 return IRQ_HANDLED;
1390 }
1391
1392 /**
1393 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1394 * @napi: napi struct with our devices info in it
1395 * @budget: amount of work driver is allowed to do this pass, in packets
1396 *
1397 * This function is optimized for cleaning one queue only on a single
1398 * q_vector!!!
1399 **/
1400 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1401 {
1402 struct ixgbe_q_vector *q_vector =
1403 container_of(napi, struct ixgbe_q_vector, napi);
1404 struct ixgbe_adapter *adapter = q_vector->adapter;
1405 struct ixgbe_ring *rx_ring = NULL;
1406 int work_done = 0;
1407 long r_idx;
1408
1409 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1410 rx_ring = &(adapter->rx_ring[r_idx]);
1411 #ifdef CONFIG_IXGBE_DCA
1412 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1413 ixgbe_update_rx_dca(adapter, rx_ring);
1414 #endif
1415
1416 ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
1417
1418 /* If all Rx work done, exit the polling mode */
1419 if (work_done < budget) {
1420 napi_complete(napi);
1421 if (adapter->rx_itr_setting & 1)
1422 ixgbe_set_itr_msix(q_vector);
1423 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1424 ixgbe_irq_enable_queues(adapter,
1425 ((u64)1 << q_vector->v_idx));
1426 }
1427
1428 return work_done;
1429 }
1430
1431 /**
1432 * ixgbe_clean_rxtx_many - msix (aka one shot) rx clean routine
1433 * @napi: napi struct with our devices info in it
1434 * @budget: amount of work driver is allowed to do this pass, in packets
1435 *
1436 * This function will clean more than one rx queue associated with a
1437 * q_vector.
1438 **/
1439 static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
1440 {
1441 struct ixgbe_q_vector *q_vector =
1442 container_of(napi, struct ixgbe_q_vector, napi);
1443 struct ixgbe_adapter *adapter = q_vector->adapter;
1444 struct ixgbe_ring *ring = NULL;
1445 int work_done = 0, i;
1446 long r_idx;
1447 bool tx_clean_complete = true;
1448
1449 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1450 for (i = 0; i < q_vector->txr_count; i++) {
1451 ring = &(adapter->tx_ring[r_idx]);
1452 #ifdef CONFIG_IXGBE_DCA
1453 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1454 ixgbe_update_tx_dca(adapter, ring);
1455 #endif
1456 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
1457 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1458 r_idx + 1);
1459 }
1460
1461 /* attempt to distribute budget to each queue fairly, but don't allow
1462 * the budget to go below 1 because we'll exit polling */
1463 budget /= (q_vector->rxr_count ?: 1);
1464 budget = max(budget, 1);
1465 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1466 for (i = 0; i < q_vector->rxr_count; i++) {
1467 ring = &(adapter->rx_ring[r_idx]);
1468 #ifdef CONFIG_IXGBE_DCA
1469 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1470 ixgbe_update_rx_dca(adapter, ring);
1471 #endif
1472 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
1473 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1474 r_idx + 1);
1475 }
1476
1477 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1478 ring = &(adapter->rx_ring[r_idx]);
1479 /* If all Rx work done, exit the polling mode */
1480 if (work_done < budget) {
1481 napi_complete(napi);
1482 if (adapter->rx_itr_setting & 1)
1483 ixgbe_set_itr_msix(q_vector);
1484 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1485 ixgbe_irq_enable_queues(adapter,
1486 ((u64)1 << q_vector->v_idx));
1487 return 0;
1488 }
1489
1490 return work_done;
1491 }
1492
1493 /**
1494 * ixgbe_clean_txonly - msix (aka one shot) tx clean routine
1495 * @napi: napi struct with our devices info in it
1496 * @budget: amount of work driver is allowed to do this pass, in packets
1497 *
1498 * This function is optimized for cleaning one queue only on a single
1499 * q_vector!!!
1500 **/
1501 static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
1502 {
1503 struct ixgbe_q_vector *q_vector =
1504 container_of(napi, struct ixgbe_q_vector, napi);
1505 struct ixgbe_adapter *adapter = q_vector->adapter;
1506 struct ixgbe_ring *tx_ring = NULL;
1507 int work_done = 0;
1508 long r_idx;
1509
1510 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1511 tx_ring = &(adapter->tx_ring[r_idx]);
1512 #ifdef CONFIG_IXGBE_DCA
1513 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1514 ixgbe_update_tx_dca(adapter, tx_ring);
1515 #endif
1516
1517 if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
1518 work_done = budget;
1519
1520 /* If all Tx work done, exit the polling mode */
1521 if (work_done < budget) {
1522 napi_complete(napi);
1523 if (adapter->tx_itr_setting & 1)
1524 ixgbe_set_itr_msix(q_vector);
1525 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1526 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
1527 }
1528
1529 return work_done;
1530 }
1531
1532 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
1533 int r_idx)
1534 {
1535 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1536
1537 set_bit(r_idx, q_vector->rxr_idx);
1538 q_vector->rxr_count++;
1539 }
1540
1541 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
1542 int t_idx)
1543 {
1544 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1545
1546 set_bit(t_idx, q_vector->txr_idx);
1547 q_vector->txr_count++;
1548 }
1549
1550 /**
1551 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
1552 * @adapter: board private structure to initialize
1553 * @vectors: allotted vector count for descriptor rings
1554 *
1555 * This function maps descriptor rings to the queue-specific vectors
1556 * we were allotted through the MSI-X enabling code. Ideally, we'd have
1557 * one vector per ring/queue, but on a constrained vector budget, we
1558 * group the rings as "efficiently" as possible. You would add new
1559 * mapping configurations in here.
1560 **/
1561 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
1562 int vectors)
1563 {
1564 int v_start = 0;
1565 int rxr_idx = 0, txr_idx = 0;
1566 int rxr_remaining = adapter->num_rx_queues;
1567 int txr_remaining = adapter->num_tx_queues;
1568 int i, j;
1569 int rqpv, tqpv;
1570 int err = 0;
1571
1572 /* No mapping required if MSI-X is disabled. */
1573 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1574 goto out;
1575
1576 /*
1577 * The ideal configuration...
1578 * We have enough vectors to map one per queue.
1579 */
1580 if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1581 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1582 map_vector_to_rxq(adapter, v_start, rxr_idx);
1583
1584 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1585 map_vector_to_txq(adapter, v_start, txr_idx);
1586
1587 goto out;
1588 }
1589
1590 /*
1591 * If we don't have enough vectors for a 1-to-1
1592 * mapping, we'll have to group them so there are
1593 * multiple queues per vector.
1594 */
1595 /* Re-adjusting *qpv takes care of the remainder. */
1596 for (i = v_start; i < vectors; i++) {
1597 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
1598 for (j = 0; j < rqpv; j++) {
1599 map_vector_to_rxq(adapter, i, rxr_idx);
1600 rxr_idx++;
1601 rxr_remaining--;
1602 }
1603 }
1604 for (i = v_start; i < vectors; i++) {
1605 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
1606 for (j = 0; j < tqpv; j++) {
1607 map_vector_to_txq(adapter, i, txr_idx);
1608 txr_idx++;
1609 txr_remaining--;
1610 }
1611 }
1612
1613 out:
1614 return err;
1615 }
1616
1617 /**
1618 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
1619 * @adapter: board private structure
1620 *
1621 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
1622 * interrupts from the kernel.
1623 **/
1624 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
1625 {
1626 struct net_device *netdev = adapter->netdev;
1627 irqreturn_t (*handler)(int, void *);
1628 int i, vector, q_vectors, err;
1629 int ri=0, ti=0;
1630
1631 /* Decrement for Other and TCP Timer vectors */
1632 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1633
1634 /* Map the Tx/Rx rings to the vectors we were allotted. */
1635 err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
1636 if (err)
1637 goto out;
1638
1639 #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
1640 (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
1641 &ixgbe_msix_clean_many)
1642 for (vector = 0; vector < q_vectors; vector++) {
1643 handler = SET_HANDLER(adapter->q_vector[vector]);
1644
1645 if(handler == &ixgbe_msix_clean_rx) {
1646 sprintf(adapter->name[vector], "%s-%s-%d",
1647 netdev->name, "rx", ri++);
1648 }
1649 else if(handler == &ixgbe_msix_clean_tx) {
1650 sprintf(adapter->name[vector], "%s-%s-%d",
1651 netdev->name, "tx", ti++);
1652 }
1653 else
1654 sprintf(adapter->name[vector], "%s-%s-%d",
1655 netdev->name, "TxRx", vector);
1656
1657 err = request_irq(adapter->msix_entries[vector].vector,
1658 handler, 0, adapter->name[vector],
1659 adapter->q_vector[vector]);
1660 if (err) {
1661 DPRINTK(PROBE, ERR,
1662 "request_irq failed for MSIX interrupt "
1663 "Error: %d\n", err);
1664 goto free_queue_irqs;
1665 }
1666 }
1667
1668 sprintf(adapter->name[vector], "%s:lsc", netdev->name);
1669 err = request_irq(adapter->msix_entries[vector].vector,
1670 &ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
1671 if (err) {
1672 DPRINTK(PROBE, ERR,
1673 "request_irq for msix_lsc failed: %d\n", err);
1674 goto free_queue_irqs;
1675 }
1676
1677 return 0;
1678
1679 free_queue_irqs:
1680 for (i = vector - 1; i >= 0; i--)
1681 free_irq(adapter->msix_entries[--vector].vector,
1682 adapter->q_vector[i]);
1683 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
1684 pci_disable_msix(adapter->pdev);
1685 kfree(adapter->msix_entries);
1686 adapter->msix_entries = NULL;
1687 out:
1688 return err;
1689 }
1690
1691 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
1692 {
1693 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1694 u8 current_itr;
1695 u32 new_itr = q_vector->eitr;
1696 struct ixgbe_ring *rx_ring = &adapter->rx_ring[0];
1697 struct ixgbe_ring *tx_ring = &adapter->tx_ring[0];
1698
1699 q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
1700 q_vector->tx_itr,
1701 tx_ring->total_packets,
1702 tx_ring->total_bytes);
1703 q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
1704 q_vector->rx_itr,
1705 rx_ring->total_packets,
1706 rx_ring->total_bytes);
1707
1708 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1709
1710 switch (current_itr) {
1711 /* counts and packets in update_itr are dependent on these numbers */
1712 case lowest_latency:
1713 new_itr = 100000;
1714 break;
1715 case low_latency:
1716 new_itr = 20000; /* aka hwitr = ~200 */
1717 break;
1718 case bulk_latency:
1719 new_itr = 8000;
1720 break;
1721 default:
1722 break;
1723 }
1724
1725 if (new_itr != q_vector->eitr) {
1726 /* do an exponential smoothing */
1727 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1728
1729 /* save the algorithm value here, not the smoothed one */
1730 q_vector->eitr = new_itr;
1731
1732 ixgbe_write_eitr(q_vector);
1733 }
1734
1735 return;
1736 }
1737
1738 /**
1739 * ixgbe_irq_enable - Enable default interrupt generation settings
1740 * @adapter: board private structure
1741 **/
1742 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
1743 {
1744 u32 mask;
1745
1746 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
1747 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
1748 mask |= IXGBE_EIMS_GPI_SDP1;
1749 if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1750 mask |= IXGBE_EIMS_ECC;
1751 mask |= IXGBE_EIMS_GPI_SDP1;
1752 mask |= IXGBE_EIMS_GPI_SDP2;
1753 }
1754 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
1755 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
1756 mask |= IXGBE_EIMS_FLOW_DIR;
1757
1758 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1759 ixgbe_irq_enable_queues(adapter, ~0);
1760 IXGBE_WRITE_FLUSH(&adapter->hw);
1761 }
1762
1763 /**
1764 * ixgbe_intr - legacy mode Interrupt Handler
1765 * @irq: interrupt number
1766 * @data: pointer to a network interface device structure
1767 **/
1768 static irqreturn_t ixgbe_intr(int irq, void *data)
1769 {
1770 struct net_device *netdev = data;
1771 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1772 struct ixgbe_hw *hw = &adapter->hw;
1773 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1774 u32 eicr;
1775
1776 /*
1777 * Workaround for silicon errata. Mask the interrupts
1778 * before the read of EICR.
1779 */
1780 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
1781
1782 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
1783 * therefore no explict interrupt disable is necessary */
1784 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
1785 if (!eicr) {
1786 /* shared interrupt alert!
1787 * make sure interrupts are enabled because the read will
1788 * have disabled interrupts due to EIAM */
1789 ixgbe_irq_enable(adapter);
1790 return IRQ_NONE; /* Not our interrupt */
1791 }
1792
1793 if (eicr & IXGBE_EICR_LSC)
1794 ixgbe_check_lsc(adapter);
1795
1796 if (hw->mac.type == ixgbe_mac_82599EB)
1797 ixgbe_check_sfp_event(adapter, eicr);
1798
1799 ixgbe_check_fan_failure(adapter, eicr);
1800
1801 if (napi_schedule_prep(&(q_vector->napi))) {
1802 adapter->tx_ring[0].total_packets = 0;
1803 adapter->tx_ring[0].total_bytes = 0;
1804 adapter->rx_ring[0].total_packets = 0;
1805 adapter->rx_ring[0].total_bytes = 0;
1806 /* would disable interrupts here but EIAM disabled it */
1807 __napi_schedule(&(q_vector->napi));
1808 }
1809
1810 return IRQ_HANDLED;
1811 }
1812
1813 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
1814 {
1815 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1816
1817 for (i = 0; i < q_vectors; i++) {
1818 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
1819 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
1820 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
1821 q_vector->rxr_count = 0;
1822 q_vector->txr_count = 0;
1823 }
1824 }
1825
1826 /**
1827 * ixgbe_request_irq - initialize interrupts
1828 * @adapter: board private structure
1829 *
1830 * Attempts to configure interrupts using the best available
1831 * capabilities of the hardware and kernel.
1832 **/
1833 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
1834 {
1835 struct net_device *netdev = adapter->netdev;
1836 int err;
1837
1838 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1839 err = ixgbe_request_msix_irqs(adapter);
1840 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
1841 err = request_irq(adapter->pdev->irq, &ixgbe_intr, 0,
1842 netdev->name, netdev);
1843 } else {
1844 err = request_irq(adapter->pdev->irq, &ixgbe_intr, IRQF_SHARED,
1845 netdev->name, netdev);
1846 }
1847
1848 if (err)
1849 DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err);
1850
1851 return err;
1852 }
1853
1854 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
1855 {
1856 struct net_device *netdev = adapter->netdev;
1857
1858 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1859 int i, q_vectors;
1860
1861 q_vectors = adapter->num_msix_vectors;
1862
1863 i = q_vectors - 1;
1864 free_irq(adapter->msix_entries[i].vector, netdev);
1865
1866 i--;
1867 for (; i >= 0; i--) {
1868 free_irq(adapter->msix_entries[i].vector,
1869 adapter->q_vector[i]);
1870 }
1871
1872 ixgbe_reset_q_vectors(adapter);
1873 } else {
1874 free_irq(adapter->pdev->irq, netdev);
1875 }
1876 }
1877
1878 /**
1879 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
1880 * @adapter: board private structure
1881 **/
1882 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
1883 {
1884 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1885 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
1886 } else {
1887 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
1888 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
1889 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
1890 }
1891 IXGBE_WRITE_FLUSH(&adapter->hw);
1892 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1893 int i;
1894 for (i = 0; i < adapter->num_msix_vectors; i++)
1895 synchronize_irq(adapter->msix_entries[i].vector);
1896 } else {
1897 synchronize_irq(adapter->pdev->irq);
1898 }
1899 }
1900
1901 /**
1902 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
1903 *
1904 **/
1905 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
1906 {
1907 struct ixgbe_hw *hw = &adapter->hw;
1908
1909 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
1910 EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr_param));
1911
1912 ixgbe_set_ivar(adapter, 0, 0, 0);
1913 ixgbe_set_ivar(adapter, 1, 0, 0);
1914
1915 map_vector_to_rxq(adapter, 0, 0);
1916 map_vector_to_txq(adapter, 0, 0);
1917
1918 DPRINTK(HW, INFO, "Legacy interrupt IVAR setup done\n");
1919 }
1920
1921 /**
1922 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
1923 * @adapter: board private structure
1924 *
1925 * Configure the Tx unit of the MAC after a reset.
1926 **/
1927 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
1928 {
1929 u64 tdba;
1930 struct ixgbe_hw *hw = &adapter->hw;
1931 u32 i, j, tdlen, txctrl;
1932
1933 /* Setup the HW Tx Head and Tail descriptor pointers */
1934 for (i = 0; i < adapter->num_tx_queues; i++) {
1935 struct ixgbe_ring *ring = &adapter->tx_ring[i];
1936 j = ring->reg_idx;
1937 tdba = ring->dma;
1938 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1939 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(j),
1940 (tdba & DMA_BIT_MASK(32)));
1941 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(j), (tdba >> 32));
1942 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(j), tdlen);
1943 IXGBE_WRITE_REG(hw, IXGBE_TDH(j), 0);
1944 IXGBE_WRITE_REG(hw, IXGBE_TDT(j), 0);
1945 adapter->tx_ring[i].head = IXGBE_TDH(j);
1946 adapter->tx_ring[i].tail = IXGBE_TDT(j);
1947 /*
1948 * Disable Tx Head Writeback RO bit, since this hoses
1949 * bookkeeping if things aren't delivered in order.
1950 */
1951 switch (hw->mac.type) {
1952 case ixgbe_mac_82598EB:
1953 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(j));
1954 break;
1955 case ixgbe_mac_82599EB:
1956 default:
1957 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(j));
1958 break;
1959 }
1960 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1961 switch (hw->mac.type) {
1962 case ixgbe_mac_82598EB:
1963 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(j), txctrl);
1964 break;
1965 case ixgbe_mac_82599EB:
1966 default:
1967 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(j), txctrl);
1968 break;
1969 }
1970 }
1971
1972 if (hw->mac.type == ixgbe_mac_82599EB) {
1973 u32 rttdcs;
1974
1975 /* disable the arbiter while setting MTQC */
1976 rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
1977 rttdcs |= IXGBE_RTTDCS_ARBDIS;
1978 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
1979
1980 /* We enable 8 traffic classes, DCB only */
1981 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
1982 IXGBE_WRITE_REG(hw, IXGBE_MTQC, (IXGBE_MTQC_RT_ENA |
1983 IXGBE_MTQC_8TC_8TQ));
1984 else
1985 IXGBE_WRITE_REG(hw, IXGBE_MTQC, IXGBE_MTQC_64Q_1PB);
1986
1987 /* re-eable the arbiter */
1988 rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
1989 IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
1990 }
1991 }
1992
1993 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1994
1995 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
1996 struct ixgbe_ring *rx_ring)
1997 {
1998 u32 srrctl;
1999 int index;
2000 struct ixgbe_ring_feature *feature = adapter->ring_feature;
2001
2002 index = rx_ring->reg_idx;
2003 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2004 unsigned long mask;
2005 mask = (unsigned long) feature[RING_F_RSS].mask;
2006 index = index & mask;
2007 }
2008 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
2009
2010 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
2011 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
2012
2013 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
2014 IXGBE_SRRCTL_BSIZEHDR_MASK;
2015
2016 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2017 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
2018 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2019 #else
2020 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2021 #endif
2022 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
2023 } else {
2024 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
2025 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2026 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
2027 }
2028
2029 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
2030 }
2031
2032 static u32 ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
2033 {
2034 u32 mrqc = 0;
2035 int mask;
2036
2037 if (!(adapter->hw.mac.type == ixgbe_mac_82599EB))
2038 return mrqc;
2039
2040 mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
2041 #ifdef CONFIG_IXGBE_DCB
2042 | IXGBE_FLAG_DCB_ENABLED
2043 #endif
2044 );
2045
2046 switch (mask) {
2047 case (IXGBE_FLAG_RSS_ENABLED):
2048 mrqc = IXGBE_MRQC_RSSEN;
2049 break;
2050 #ifdef CONFIG_IXGBE_DCB
2051 case (IXGBE_FLAG_DCB_ENABLED):
2052 mrqc = IXGBE_MRQC_RT8TCEN;
2053 break;
2054 #endif /* CONFIG_IXGBE_DCB */
2055 default:
2056 break;
2057 }
2058
2059 return mrqc;
2060 }
2061
2062 /**
2063 * ixgbe_configure_rscctl - enable RSC for the indicated ring
2064 * @adapter: address of board private structure
2065 * @index: index of ring to set
2066 * @rx_buf_len: rx buffer length
2067 **/
2068 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter, int index,
2069 int rx_buf_len)
2070 {
2071 struct ixgbe_ring *rx_ring;
2072 struct ixgbe_hw *hw = &adapter->hw;
2073 int j;
2074 u32 rscctrl;
2075
2076 rx_ring = &adapter->rx_ring[index];
2077 j = rx_ring->reg_idx;
2078 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(j));
2079 rscctrl |= IXGBE_RSCCTL_RSCEN;
2080 /*
2081 * we must limit the number of descriptors so that the
2082 * total size of max desc * buf_len is not greater
2083 * than 65535
2084 */
2085 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2086 #if (MAX_SKB_FRAGS > 16)
2087 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2088 #elif (MAX_SKB_FRAGS > 8)
2089 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2090 #elif (MAX_SKB_FRAGS > 4)
2091 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2092 #else
2093 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2094 #endif
2095 } else {
2096 if (rx_buf_len < IXGBE_RXBUFFER_4096)
2097 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2098 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
2099 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2100 else
2101 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2102 }
2103 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(j), rscctrl);
2104 }
2105
2106 /**
2107 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
2108 * @adapter: board private structure
2109 *
2110 * Configure the Rx unit of the MAC after a reset.
2111 **/
2112 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
2113 {
2114 u64 rdba;
2115 struct ixgbe_hw *hw = &adapter->hw;
2116 struct ixgbe_ring *rx_ring;
2117 struct net_device *netdev = adapter->netdev;
2118 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2119 int i, j;
2120 u32 rdlen, rxctrl, rxcsum;
2121 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2122 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2123 0x6A3E67EA, 0x14364D17, 0x3BED200D};
2124 u32 fctrl, hlreg0;
2125 u32 reta = 0, mrqc = 0;
2126 u32 rdrxctl;
2127 int rx_buf_len;
2128
2129 /* Decide whether to use packet split mode or not */
2130 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
2131
2132 /* Set the RX buffer length according to the mode */
2133 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
2134 rx_buf_len = IXGBE_RX_HDR_SIZE;
2135 if (hw->mac.type == ixgbe_mac_82599EB) {
2136 /* PSRTYPE must be initialized in 82599 */
2137 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
2138 IXGBE_PSRTYPE_UDPHDR |
2139 IXGBE_PSRTYPE_IPV4HDR |
2140 IXGBE_PSRTYPE_IPV6HDR |
2141 IXGBE_PSRTYPE_L2HDR;
2142 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(0), psrtype);
2143 }
2144 } else {
2145 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
2146 (netdev->mtu <= ETH_DATA_LEN))
2147 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
2148 else
2149 rx_buf_len = ALIGN(max_frame, 1024);
2150 }
2151
2152 fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
2153 fctrl |= IXGBE_FCTRL_BAM;
2154 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
2155 fctrl |= IXGBE_FCTRL_PMCF;
2156 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
2157
2158 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
2159 if (adapter->netdev->mtu <= ETH_DATA_LEN)
2160 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
2161 else
2162 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2163 #ifdef IXGBE_FCOE
2164 if (netdev->features & NETIF_F_FCOE_MTU)
2165 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2166 #endif
2167 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
2168
2169 rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
2170 /* disable receives while setting up the descriptors */
2171 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2172 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2173
2174 /*
2175 * Setup the HW Rx Head and Tail Descriptor Pointers and
2176 * the Base and Length of the Rx Descriptor Ring
2177 */
2178 for (i = 0; i < adapter->num_rx_queues; i++) {
2179 rx_ring = &adapter->rx_ring[i];
2180 rdba = rx_ring->dma;
2181 j = rx_ring->reg_idx;
2182 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(j), (rdba & DMA_BIT_MASK(32)));
2183 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(j), (rdba >> 32));
2184 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(j), rdlen);
2185 IXGBE_WRITE_REG(hw, IXGBE_RDH(j), 0);
2186 IXGBE_WRITE_REG(hw, IXGBE_RDT(j), 0);
2187 rx_ring->head = IXGBE_RDH(j);
2188 rx_ring->tail = IXGBE_RDT(j);
2189 rx_ring->rx_buf_len = rx_buf_len;
2190
2191 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
2192 rx_ring->flags |= IXGBE_RING_RX_PS_ENABLED;
2193 else
2194 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2195
2196 #ifdef IXGBE_FCOE
2197 if (netdev->features & NETIF_F_FCOE_MTU) {
2198 struct ixgbe_ring_feature *f;
2199 f = &adapter->ring_feature[RING_F_FCOE];
2200 if ((i >= f->mask) && (i < f->mask + f->indices)) {
2201 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2202 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
2203 rx_ring->rx_buf_len =
2204 IXGBE_FCOE_JUMBO_FRAME_SIZE;
2205 }
2206 }
2207
2208 #endif /* IXGBE_FCOE */
2209 ixgbe_configure_srrctl(adapter, rx_ring);
2210 }
2211
2212 if (hw->mac.type == ixgbe_mac_82598EB) {
2213 /*
2214 * For VMDq support of different descriptor types or
2215 * buffer sizes through the use of multiple SRRCTL
2216 * registers, RDRXCTL.MVMEN must be set to 1
2217 *
2218 * also, the manual doesn't mention it clearly but DCA hints
2219 * will only use queue 0's tags unless this bit is set. Side
2220 * effects of setting this bit are only that SRRCTL must be
2221 * fully programmed [0..15]
2222 */
2223 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2224 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
2225 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2226 }
2227
2228 /* Program MRQC for the distribution of queues */
2229 mrqc = ixgbe_setup_mrqc(adapter);
2230
2231 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
2232 /* Fill out redirection table */
2233 for (i = 0, j = 0; i < 128; i++, j++) {
2234 if (j == adapter->ring_feature[RING_F_RSS].indices)
2235 j = 0;
2236 /* reta = 4-byte sliding window of
2237 * 0x00..(indices-1)(indices-1)00..etc. */
2238 reta = (reta << 8) | (j * 0x11);
2239 if ((i & 3) == 3)
2240 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2241 }
2242
2243 /* Fill out hash function seeds */
2244 for (i = 0; i < 10; i++)
2245 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2246
2247 if (hw->mac.type == ixgbe_mac_82598EB)
2248 mrqc |= IXGBE_MRQC_RSSEN;
2249 /* Perform hash on these packet types */
2250 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2251 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2252 | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
2253 | IXGBE_MRQC_RSS_FIELD_IPV6
2254 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
2255 | IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
2256 }
2257 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2258
2259 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2260
2261 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED ||
2262 adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
2263 /* Disable indicating checksum in descriptor, enables
2264 * RSS hash */
2265 rxcsum |= IXGBE_RXCSUM_PCSD;
2266 }
2267 if (!(rxcsum & IXGBE_RXCSUM_PCSD)) {
2268 /* Enable IPv4 payload checksum for UDP fragments
2269 * if PCSD is not set */
2270 rxcsum |= IXGBE_RXCSUM_IPPCSE;
2271 }
2272
2273 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2274
2275 if (hw->mac.type == ixgbe_mac_82599EB) {
2276 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2277 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
2278 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
2279 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2280 }
2281
2282 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
2283 /* Enable 82599 HW-RSC */
2284 for (i = 0; i < adapter->num_rx_queues; i++)
2285 ixgbe_configure_rscctl(adapter, i, rx_buf_len);
2286
2287 /* Disable RSC for ACK packets */
2288 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
2289 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
2290 }
2291 }
2292
2293 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2294 {
2295 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2296 struct ixgbe_hw *hw = &adapter->hw;
2297
2298 /* add VID to filter table */
2299 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, true);
2300 }
2301
2302 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2303 {
2304 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2305 struct ixgbe_hw *hw = &adapter->hw;
2306
2307 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2308 ixgbe_irq_disable(adapter);
2309
2310 vlan_group_set_device(adapter->vlgrp, vid, NULL);
2311
2312 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2313 ixgbe_irq_enable(adapter);
2314
2315 /* remove VID from filter table */
2316 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, false);
2317 }
2318
2319 static void ixgbe_vlan_rx_register(struct net_device *netdev,
2320 struct vlan_group *grp)
2321 {
2322 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2323 u32 ctrl;
2324 int i, j;
2325
2326 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2327 ixgbe_irq_disable(adapter);
2328 adapter->vlgrp = grp;
2329
2330 /*
2331 * For a DCB driver, always enable VLAN tag stripping so we can
2332 * still receive traffic from a DCB-enabled host even if we're
2333 * not in DCB mode.
2334 */
2335 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
2336 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2337 ctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2338 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
2339 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
2340 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
2341 ctrl |= IXGBE_VLNCTRL_VFE;
2342 /* enable VLAN tag insert/strip */
2343 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
2344 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
2345 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
2346 for (i = 0; i < adapter->num_rx_queues; i++) {
2347 j = adapter->rx_ring[i].reg_idx;
2348 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXDCTL(j));
2349 ctrl |= IXGBE_RXDCTL_VME;
2350 IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXDCTL(j), ctrl);
2351 }
2352 }
2353 ixgbe_vlan_rx_add_vid(netdev, 0);
2354
2355 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2356 ixgbe_irq_enable(adapter);
2357 }
2358
2359 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
2360 {
2361 ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2362
2363 if (adapter->vlgrp) {
2364 u16 vid;
2365 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2366 if (!vlan_group_get_device(adapter->vlgrp, vid))
2367 continue;
2368 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
2369 }
2370 }
2371 }
2372
2373 static u8 *ixgbe_addr_list_itr(struct ixgbe_hw *hw, u8 **mc_addr_ptr, u32 *vmdq)
2374 {
2375 struct dev_mc_list *mc_ptr;
2376 u8 *addr = *mc_addr_ptr;
2377 *vmdq = 0;
2378
2379 mc_ptr = container_of(addr, struct dev_mc_list, dmi_addr[0]);
2380 if (mc_ptr->next)
2381 *mc_addr_ptr = mc_ptr->next->dmi_addr;
2382 else
2383 *mc_addr_ptr = NULL;
2384
2385 return addr;
2386 }
2387
2388 /**
2389 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
2390 * @netdev: network interface device structure
2391 *
2392 * The set_rx_method entry point is called whenever the unicast/multicast
2393 * address list or the network interface flags are updated. This routine is
2394 * responsible for configuring the hardware for proper unicast, multicast and
2395 * promiscuous mode.
2396 **/
2397 static void ixgbe_set_rx_mode(struct net_device *netdev)
2398 {
2399 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2400 struct ixgbe_hw *hw = &adapter->hw;
2401 u32 fctrl, vlnctrl;
2402 u8 *addr_list = NULL;
2403 int addr_count = 0;
2404
2405 /* Check for Promiscuous and All Multicast modes */
2406
2407 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
2408 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2409
2410 if (netdev->flags & IFF_PROMISC) {
2411 hw->addr_ctrl.user_set_promisc = 1;
2412 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2413 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
2414 } else {
2415 if (netdev->flags & IFF_ALLMULTI) {
2416 fctrl |= IXGBE_FCTRL_MPE;
2417 fctrl &= ~IXGBE_FCTRL_UPE;
2418 } else {
2419 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2420 }
2421 vlnctrl |= IXGBE_VLNCTRL_VFE;
2422 hw->addr_ctrl.user_set_promisc = 0;
2423 }
2424
2425 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
2426 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2427
2428 /* reprogram secondary unicast list */
2429 hw->mac.ops.update_uc_addr_list(hw, &netdev->uc.list);
2430
2431 /* reprogram multicast list */
2432 addr_count = netdev->mc_count;
2433 if (addr_count)
2434 addr_list = netdev->mc_list->dmi_addr;
2435 hw->mac.ops.update_mc_addr_list(hw, addr_list, addr_count,
2436 ixgbe_addr_list_itr);
2437 }
2438
2439 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
2440 {
2441 int q_idx;
2442 struct ixgbe_q_vector *q_vector;
2443 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2444
2445 /* legacy and MSI only use one vector */
2446 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2447 q_vectors = 1;
2448
2449 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2450 struct napi_struct *napi;
2451 q_vector = adapter->q_vector[q_idx];
2452 napi = &q_vector->napi;
2453 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2454 if (!q_vector->rxr_count || !q_vector->txr_count) {
2455 if (q_vector->txr_count == 1)
2456 napi->poll = &ixgbe_clean_txonly;
2457 else if (q_vector->rxr_count == 1)
2458 napi->poll = &ixgbe_clean_rxonly;
2459 }
2460 }
2461
2462 napi_enable(napi);
2463 }
2464 }
2465
2466 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
2467 {
2468 int q_idx;
2469 struct ixgbe_q_vector *q_vector;
2470 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2471
2472 /* legacy and MSI only use one vector */
2473 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2474 q_vectors = 1;
2475
2476 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2477 q_vector = adapter->q_vector[q_idx];
2478 napi_disable(&q_vector->napi);
2479 }
2480 }
2481
2482 #ifdef CONFIG_IXGBE_DCB
2483 /*
2484 * ixgbe_configure_dcb - Configure DCB hardware
2485 * @adapter: ixgbe adapter struct
2486 *
2487 * This is called by the driver on open to configure the DCB hardware.
2488 * This is also called by the gennetlink interface when reconfiguring
2489 * the DCB state.
2490 */
2491 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
2492 {
2493 struct ixgbe_hw *hw = &adapter->hw;
2494 u32 txdctl, vlnctrl;
2495 int i, j;
2496
2497 ixgbe_dcb_check_config(&adapter->dcb_cfg);
2498 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_TX_CONFIG);
2499 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_RX_CONFIG);
2500
2501 /* reconfigure the hardware */
2502 ixgbe_dcb_hw_config(&adapter->hw, &adapter->dcb_cfg);
2503
2504 for (i = 0; i < adapter->num_tx_queues; i++) {
2505 j = adapter->tx_ring[i].reg_idx;
2506 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2507 /* PThresh workaround for Tx hang with DFP enabled. */
2508 txdctl |= 32;
2509 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2510 }
2511 /* Enable VLAN tag insert/strip */
2512 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2513 if (hw->mac.type == ixgbe_mac_82598EB) {
2514 vlnctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2515 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2516 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2517 } else if (hw->mac.type == ixgbe_mac_82599EB) {
2518 vlnctrl |= IXGBE_VLNCTRL_VFE;
2519 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2520 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2521 for (i = 0; i < adapter->num_rx_queues; i++) {
2522 j = adapter->rx_ring[i].reg_idx;
2523 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2524 vlnctrl |= IXGBE_RXDCTL_VME;
2525 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
2526 }
2527 }
2528 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
2529 }
2530
2531 #endif
2532 static void ixgbe_configure(struct ixgbe_adapter *adapter)
2533 {
2534 struct net_device *netdev = adapter->netdev;
2535 struct ixgbe_hw *hw = &adapter->hw;
2536 int i;
2537
2538 ixgbe_set_rx_mode(netdev);
2539
2540 ixgbe_restore_vlan(adapter);
2541 #ifdef CONFIG_IXGBE_DCB
2542 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2543 if (hw->mac.type == ixgbe_mac_82598EB)
2544 netif_set_gso_max_size(netdev, 32768);
2545 else
2546 netif_set_gso_max_size(netdev, 65536);
2547 ixgbe_configure_dcb(adapter);
2548 } else {
2549 netif_set_gso_max_size(netdev, 65536);
2550 }
2551 #else
2552 netif_set_gso_max_size(netdev, 65536);
2553 #endif
2554
2555 #ifdef IXGBE_FCOE
2556 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
2557 ixgbe_configure_fcoe(adapter);
2558
2559 #endif /* IXGBE_FCOE */
2560 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2561 for (i = 0; i < adapter->num_tx_queues; i++)
2562 adapter->tx_ring[i].atr_sample_rate =
2563 adapter->atr_sample_rate;
2564 ixgbe_init_fdir_signature_82599(hw, adapter->fdir_pballoc);
2565 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
2566 ixgbe_init_fdir_perfect_82599(hw, adapter->fdir_pballoc);
2567 }
2568
2569 ixgbe_configure_tx(adapter);
2570 ixgbe_configure_rx(adapter);
2571 for (i = 0; i < adapter->num_rx_queues; i++)
2572 ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i],
2573 (adapter->rx_ring[i].count - 1));
2574 }
2575
2576 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
2577 {
2578 switch (hw->phy.type) {
2579 case ixgbe_phy_sfp_avago:
2580 case ixgbe_phy_sfp_ftl:
2581 case ixgbe_phy_sfp_intel:
2582 case ixgbe_phy_sfp_unknown:
2583 case ixgbe_phy_tw_tyco:
2584 case ixgbe_phy_tw_unknown:
2585 return true;
2586 default:
2587 return false;
2588 }
2589 }
2590
2591 /**
2592 * ixgbe_sfp_link_config - set up SFP+ link
2593 * @adapter: pointer to private adapter struct
2594 **/
2595 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
2596 {
2597 struct ixgbe_hw *hw = &adapter->hw;
2598
2599 if (hw->phy.multispeed_fiber) {
2600 /*
2601 * In multispeed fiber setups, the device may not have
2602 * had a physical connection when the driver loaded.
2603 * If that's the case, the initial link configuration
2604 * couldn't get the MAC into 10G or 1G mode, so we'll
2605 * never have a link status change interrupt fire.
2606 * We need to try and force an autonegotiation
2607 * session, then bring up link.
2608 */
2609 hw->mac.ops.setup_sfp(hw);
2610 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
2611 schedule_work(&adapter->multispeed_fiber_task);
2612 } else {
2613 /*
2614 * Direct Attach Cu and non-multispeed fiber modules
2615 * still need to be configured properly prior to
2616 * attempting link.
2617 */
2618 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_MOD_TASK))
2619 schedule_work(&adapter->sfp_config_module_task);
2620 }
2621 }
2622
2623 /**
2624 * ixgbe_non_sfp_link_config - set up non-SFP+ link
2625 * @hw: pointer to private hardware struct
2626 *
2627 * Returns 0 on success, negative on failure
2628 **/
2629 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
2630 {
2631 u32 autoneg;
2632 bool negotiation, link_up = false;
2633 u32 ret = IXGBE_ERR_LINK_SETUP;
2634
2635 if (hw->mac.ops.check_link)
2636 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
2637
2638 if (ret)
2639 goto link_cfg_out;
2640
2641 if (hw->mac.ops.get_link_capabilities)
2642 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
2643 if (ret)
2644 goto link_cfg_out;
2645
2646 if (hw->mac.ops.setup_link)
2647 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
2648 link_cfg_out:
2649 return ret;
2650 }
2651
2652 #define IXGBE_MAX_RX_DESC_POLL 10
2653 static inline void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
2654 int rxr)
2655 {
2656 int j = adapter->rx_ring[rxr].reg_idx;
2657 int k;
2658
2659 for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) {
2660 if (IXGBE_READ_REG(&adapter->hw,
2661 IXGBE_RXDCTL(j)) & IXGBE_RXDCTL_ENABLE)
2662 break;
2663 else
2664 msleep(1);
2665 }
2666 if (k >= IXGBE_MAX_RX_DESC_POLL) {
2667 DPRINTK(DRV, ERR, "RXDCTL.ENABLE on Rx queue %d "
2668 "not set within the polling period\n", rxr);
2669 }
2670 ixgbe_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr],
2671 (adapter->rx_ring[rxr].count - 1));
2672 }
2673
2674 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
2675 {
2676 struct net_device *netdev = adapter->netdev;
2677 struct ixgbe_hw *hw = &adapter->hw;
2678 int i, j = 0;
2679 int num_rx_rings = adapter->num_rx_queues;
2680 int err;
2681 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2682 u32 txdctl, rxdctl, mhadd;
2683 u32 dmatxctl;
2684 u32 gpie;
2685
2686 ixgbe_get_hw_control(adapter);
2687
2688 if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) ||
2689 (adapter->flags & IXGBE_FLAG_MSI_ENABLED)) {
2690 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2691 gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
2692 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
2693 } else {
2694 /* MSI only */
2695 gpie = 0;
2696 }
2697 /* XXX: to interrupt immediately for EICS writes, enable this */
2698 /* gpie |= IXGBE_GPIE_EIMEN; */
2699 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2700 }
2701
2702 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
2703 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
2704 * specifically only auto mask tx and rx interrupts */
2705 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
2706 }
2707
2708 /* Enable fan failure interrupt if media type is copper */
2709 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2710 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2711 gpie |= IXGBE_SDP1_GPIEN;
2712 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2713 }
2714
2715 if (hw->mac.type == ixgbe_mac_82599EB) {
2716 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2717 gpie |= IXGBE_SDP1_GPIEN;
2718 gpie |= IXGBE_SDP2_GPIEN;
2719 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2720 }
2721
2722 #ifdef IXGBE_FCOE
2723 /* adjust max frame to be able to do baby jumbo for FCoE */
2724 if ((netdev->features & NETIF_F_FCOE_MTU) &&
2725 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
2726 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
2727
2728 #endif /* IXGBE_FCOE */
2729 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
2730 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
2731 mhadd &= ~IXGBE_MHADD_MFS_MASK;
2732 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
2733
2734 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
2735 }
2736
2737 for (i = 0; i < adapter->num_tx_queues; i++) {
2738 j = adapter->tx_ring[i].reg_idx;
2739 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2740 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
2741 txdctl |= (8 << 16);
2742 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2743 }
2744
2745 if (hw->mac.type == ixgbe_mac_82599EB) {
2746 /* DMATXCTL.EN must be set after all Tx queue config is done */
2747 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2748 dmatxctl |= IXGBE_DMATXCTL_TE;
2749 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2750 }
2751 for (i = 0; i < adapter->num_tx_queues; i++) {
2752 j = adapter->tx_ring[i].reg_idx;
2753 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2754 txdctl |= IXGBE_TXDCTL_ENABLE;
2755 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2756 }
2757
2758 for (i = 0; i < num_rx_rings; i++) {
2759 j = adapter->rx_ring[i].reg_idx;
2760 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2761 /* enable PTHRESH=32 descriptors (half the internal cache)
2762 * and HTHRESH=0 descriptors (to minimize latency on fetch),
2763 * this also removes a pesky rx_no_buffer_count increment */
2764 rxdctl |= 0x0020;
2765 rxdctl |= IXGBE_RXDCTL_ENABLE;
2766 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), rxdctl);
2767 if (hw->mac.type == ixgbe_mac_82599EB)
2768 ixgbe_rx_desc_queue_enable(adapter, i);
2769 }
2770 /* enable all receives */
2771 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2772 if (hw->mac.type == ixgbe_mac_82598EB)
2773 rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
2774 else
2775 rxdctl |= IXGBE_RXCTRL_RXEN;
2776 hw->mac.ops.enable_rx_dma(hw, rxdctl);
2777
2778 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2779 ixgbe_configure_msix(adapter);
2780 else
2781 ixgbe_configure_msi_and_legacy(adapter);
2782
2783 clear_bit(__IXGBE_DOWN, &adapter->state);
2784 ixgbe_napi_enable_all(adapter);
2785
2786 /* clear any pending interrupts, may auto mask */
2787 IXGBE_READ_REG(hw, IXGBE_EICR);
2788
2789 ixgbe_irq_enable(adapter);
2790
2791 /*
2792 * If this adapter has a fan, check to see if we had a failure
2793 * before we enabled the interrupt.
2794 */
2795 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2796 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
2797 if (esdp & IXGBE_ESDP_SDP1)
2798 DPRINTK(DRV, CRIT,
2799 "Fan has stopped, replace the adapter\n");
2800 }
2801
2802 /*
2803 * For hot-pluggable SFP+ devices, a new SFP+ module may have
2804 * arrived before interrupts were enabled but after probe. Such
2805 * devices wouldn't have their type identified yet. We need to
2806 * kick off the SFP+ module setup first, then try to bring up link.
2807 * If we're not hot-pluggable SFP+, we just need to configure link
2808 * and bring it up.
2809 */
2810 if (hw->phy.type == ixgbe_phy_unknown) {
2811 err = hw->phy.ops.identify(hw);
2812 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
2813 /*
2814 * Take the device down and schedule the sfp tasklet
2815 * which will unregister_netdev and log it.
2816 */
2817 ixgbe_down(adapter);
2818 schedule_work(&adapter->sfp_config_module_task);
2819 return err;
2820 }
2821 }
2822
2823 if (ixgbe_is_sfp(hw)) {
2824 ixgbe_sfp_link_config(adapter);
2825 } else {
2826 err = ixgbe_non_sfp_link_config(hw);
2827 if (err)
2828 DPRINTK(PROBE, ERR, "link_config FAILED %d\n", err);
2829 }
2830
2831 for (i = 0; i < adapter->num_tx_queues; i++)
2832 set_bit(__IXGBE_FDIR_INIT_DONE,
2833 &(adapter->tx_ring[i].reinit_state));
2834
2835 /* enable transmits */
2836 netif_tx_start_all_queues(netdev);
2837
2838 /* bring the link up in the watchdog, this could race with our first
2839 * link up interrupt but shouldn't be a problem */
2840 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2841 adapter->link_check_timeout = jiffies;
2842 mod_timer(&adapter->watchdog_timer, jiffies);
2843 return 0;
2844 }
2845
2846 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
2847 {
2848 WARN_ON(in_interrupt());
2849 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
2850 msleep(1);
2851 ixgbe_down(adapter);
2852 ixgbe_up(adapter);
2853 clear_bit(__IXGBE_RESETTING, &adapter->state);
2854 }
2855
2856 int ixgbe_up(struct ixgbe_adapter *adapter)
2857 {
2858 /* hardware has been reset, we need to reload some things */
2859 ixgbe_configure(adapter);
2860
2861 return ixgbe_up_complete(adapter);
2862 }
2863
2864 void ixgbe_reset(struct ixgbe_adapter *adapter)
2865 {
2866 struct ixgbe_hw *hw = &adapter->hw;
2867 int err;
2868
2869 err = hw->mac.ops.init_hw(hw);
2870 switch (err) {
2871 case 0:
2872 case IXGBE_ERR_SFP_NOT_PRESENT:
2873 break;
2874 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
2875 dev_err(&adapter->pdev->dev, "master disable timed out\n");
2876 break;
2877 case IXGBE_ERR_EEPROM_VERSION:
2878 /* We are running on a pre-production device, log a warning */
2879 dev_warn(&adapter->pdev->dev, "This device is a pre-production "
2880 "adapter/LOM. Please be aware there may be issues "
2881 "associated with your hardware. If you are "
2882 "experiencing problems please contact your Intel or "
2883 "hardware representative who provided you with this "
2884 "hardware.\n");
2885 break;
2886 default:
2887 dev_err(&adapter->pdev->dev, "Hardware Error: %d\n", err);
2888 }
2889
2890 /* reprogram the RAR[0] in case user changed it. */
2891 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
2892 }
2893
2894 /**
2895 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
2896 * @adapter: board private structure
2897 * @rx_ring: ring to free buffers from
2898 **/
2899 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
2900 struct ixgbe_ring *rx_ring)
2901 {
2902 struct pci_dev *pdev = adapter->pdev;
2903 unsigned long size;
2904 unsigned int i;
2905
2906 /* Free all the Rx ring sk_buffs */
2907
2908 for (i = 0; i < rx_ring->count; i++) {
2909 struct ixgbe_rx_buffer *rx_buffer_info;
2910
2911 rx_buffer_info = &rx_ring->rx_buffer_info[i];
2912 if (rx_buffer_info->dma) {
2913 pci_unmap_single(pdev, rx_buffer_info->dma,
2914 rx_ring->rx_buf_len,
2915 PCI_DMA_FROMDEVICE);
2916 rx_buffer_info->dma = 0;
2917 }
2918 if (rx_buffer_info->skb) {
2919 struct sk_buff *skb = rx_buffer_info->skb;
2920 rx_buffer_info->skb = NULL;
2921 do {
2922 struct sk_buff *this = skb;
2923 skb = skb->prev;
2924 dev_kfree_skb(this);
2925 } while (skb);
2926 }
2927 if (!rx_buffer_info->page)
2928 continue;
2929 if (rx_buffer_info->page_dma) {
2930 pci_unmap_page(pdev, rx_buffer_info->page_dma,
2931 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
2932 rx_buffer_info->page_dma = 0;
2933 }
2934 put_page(rx_buffer_info->page);
2935 rx_buffer_info->page = NULL;
2936 rx_buffer_info->page_offset = 0;
2937 }
2938
2939 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
2940 memset(rx_ring->rx_buffer_info, 0, size);
2941
2942 /* Zero out the descriptor ring */
2943 memset(rx_ring->desc, 0, rx_ring->size);
2944
2945 rx_ring->next_to_clean = 0;
2946 rx_ring->next_to_use = 0;
2947
2948 if (rx_ring->head)
2949 writel(0, adapter->hw.hw_addr + rx_ring->head);
2950 if (rx_ring->tail)
2951 writel(0, adapter->hw.hw_addr + rx_ring->tail);
2952 }
2953
2954 /**
2955 * ixgbe_clean_tx_ring - Free Tx Buffers
2956 * @adapter: board private structure
2957 * @tx_ring: ring to be cleaned
2958 **/
2959 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
2960 struct ixgbe_ring *tx_ring)
2961 {
2962 struct ixgbe_tx_buffer *tx_buffer_info;
2963 unsigned long size;
2964 unsigned int i;
2965
2966 /* Free all the Tx ring sk_buffs */
2967
2968 for (i = 0; i < tx_ring->count; i++) {
2969 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2970 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
2971 }
2972
2973 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
2974 memset(tx_ring->tx_buffer_info, 0, size);
2975
2976 /* Zero out the descriptor ring */
2977 memset(tx_ring->desc, 0, tx_ring->size);
2978
2979 tx_ring->next_to_use = 0;
2980 tx_ring->next_to_clean = 0;
2981
2982 if (tx_ring->head)
2983 writel(0, adapter->hw.hw_addr + tx_ring->head);
2984 if (tx_ring->tail)
2985 writel(0, adapter->hw.hw_addr + tx_ring->tail);
2986 }
2987
2988 /**
2989 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
2990 * @adapter: board private structure
2991 **/
2992 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
2993 {
2994 int i;
2995
2996 for (i = 0; i < adapter->num_rx_queues; i++)
2997 ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2998 }
2999
3000 /**
3001 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
3002 * @adapter: board private structure
3003 **/
3004 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
3005 {
3006 int i;
3007
3008 for (i = 0; i < adapter->num_tx_queues; i++)
3009 ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
3010 }
3011
3012 void ixgbe_down(struct ixgbe_adapter *adapter)
3013 {
3014 struct net_device *netdev = adapter->netdev;
3015 struct ixgbe_hw *hw = &adapter->hw;
3016 u32 rxctrl;
3017 u32 txdctl;
3018 int i, j;
3019
3020 /* signal that we are down to the interrupt handler */
3021 set_bit(__IXGBE_DOWN, &adapter->state);
3022
3023 /* disable receives */
3024 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3025 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3026
3027 netif_tx_disable(netdev);
3028
3029 IXGBE_WRITE_FLUSH(hw);
3030 msleep(10);
3031
3032 netif_tx_stop_all_queues(netdev);
3033
3034 ixgbe_irq_disable(adapter);
3035
3036 ixgbe_napi_disable_all(adapter);
3037
3038 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3039 del_timer_sync(&adapter->sfp_timer);
3040 del_timer_sync(&adapter->watchdog_timer);
3041 cancel_work_sync(&adapter->watchdog_task);
3042
3043 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3044 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
3045 cancel_work_sync(&adapter->fdir_reinit_task);
3046
3047 /* disable transmits in the hardware now that interrupts are off */
3048 for (i = 0; i < adapter->num_tx_queues; i++) {
3049 j = adapter->tx_ring[i].reg_idx;
3050 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3051 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
3052 (txdctl & ~IXGBE_TXDCTL_ENABLE));
3053 }
3054 /* Disable the Tx DMA engine on 82599 */
3055 if (hw->mac.type == ixgbe_mac_82599EB)
3056 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
3057 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
3058 ~IXGBE_DMATXCTL_TE));
3059
3060 netif_carrier_off(netdev);
3061
3062 if (!pci_channel_offline(adapter->pdev))
3063 ixgbe_reset(adapter);
3064 ixgbe_clean_all_tx_rings(adapter);
3065 ixgbe_clean_all_rx_rings(adapter);
3066
3067 #ifdef CONFIG_IXGBE_DCA
3068 /* since we reset the hardware DCA settings were cleared */
3069 ixgbe_setup_dca(adapter);
3070 #endif
3071 }
3072
3073 /**
3074 * ixgbe_poll - NAPI Rx polling callback
3075 * @napi: structure for representing this polling device
3076 * @budget: how many packets driver is allowed to clean
3077 *
3078 * This function is used for legacy and MSI, NAPI mode
3079 **/
3080 static int ixgbe_poll(struct napi_struct *napi, int budget)
3081 {
3082 struct ixgbe_q_vector *q_vector =
3083 container_of(napi, struct ixgbe_q_vector, napi);
3084 struct ixgbe_adapter *adapter = q_vector->adapter;
3085 int tx_clean_complete, work_done = 0;
3086
3087 #ifdef CONFIG_IXGBE_DCA
3088 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
3089 ixgbe_update_tx_dca(adapter, adapter->tx_ring);
3090 ixgbe_update_rx_dca(adapter, adapter->rx_ring);
3091 }
3092 #endif
3093
3094 tx_clean_complete = ixgbe_clean_tx_irq(q_vector, adapter->tx_ring);
3095 ixgbe_clean_rx_irq(q_vector, adapter->rx_ring, &work_done, budget);
3096
3097 if (!tx_clean_complete)
3098 work_done = budget;
3099
3100 /* If budget not fully consumed, exit the polling mode */
3101 if (work_done < budget) {
3102 napi_complete(napi);
3103 if (adapter->rx_itr_setting & 1)
3104 ixgbe_set_itr(adapter);
3105 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3106 ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
3107 }
3108 return work_done;
3109 }
3110
3111 /**
3112 * ixgbe_tx_timeout - Respond to a Tx Hang
3113 * @netdev: network interface device structure
3114 **/
3115 static void ixgbe_tx_timeout(struct net_device *netdev)
3116 {
3117 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3118
3119 /* Do the reset outside of interrupt context */
3120 schedule_work(&adapter->reset_task);
3121 }
3122
3123 static void ixgbe_reset_task(struct work_struct *work)
3124 {
3125 struct ixgbe_adapter *adapter;
3126 adapter = container_of(work, struct ixgbe_adapter, reset_task);
3127
3128 /* If we're already down or resetting, just bail */
3129 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
3130 test_bit(__IXGBE_RESETTING, &adapter->state))
3131 return;
3132
3133 adapter->tx_timeout_count++;
3134
3135 ixgbe_reinit_locked(adapter);
3136 }
3137
3138 #ifdef CONFIG_IXGBE_DCB
3139 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
3140 {
3141 bool ret = false;
3142 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_DCB];
3143
3144 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
3145 return ret;
3146
3147 f->mask = 0x7 << 3;
3148 adapter->num_rx_queues = f->indices;
3149 adapter->num_tx_queues = f->indices;
3150 ret = true;
3151
3152 return ret;
3153 }
3154 #endif
3155
3156 /**
3157 * ixgbe_set_rss_queues: Allocate queues for RSS
3158 * @adapter: board private structure to initialize
3159 *
3160 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
3161 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
3162 *
3163 **/
3164 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
3165 {
3166 bool ret = false;
3167 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
3168
3169 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3170 f->mask = 0xF;
3171 adapter->num_rx_queues = f->indices;
3172 adapter->num_tx_queues = f->indices;
3173 ret = true;
3174 } else {
3175 ret = false;
3176 }
3177
3178 return ret;
3179 }
3180
3181 /**
3182 * ixgbe_set_fdir_queues: Allocate queues for Flow Director
3183 * @adapter: board private structure to initialize
3184 *
3185 * Flow Director is an advanced Rx filter, attempting to get Rx flows back
3186 * to the original CPU that initiated the Tx session. This runs in addition
3187 * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
3188 * Rx load across CPUs using RSS.
3189 *
3190 **/
3191 static bool inline ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
3192 {
3193 bool ret = false;
3194 struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
3195
3196 f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
3197 f_fdir->mask = 0;
3198
3199 /* Flow Director must have RSS enabled */
3200 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3201 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3202 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)))) {
3203 adapter->num_tx_queues = f_fdir->indices;
3204 adapter->num_rx_queues = f_fdir->indices;
3205 ret = true;
3206 } else {
3207 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3208 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3209 }
3210 return ret;
3211 }
3212
3213 #ifdef IXGBE_FCOE
3214 /**
3215 * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
3216 * @adapter: board private structure to initialize
3217 *
3218 * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
3219 * The ring feature mask is not used as a mask for FCoE, as it can take any 8
3220 * rx queues out of the max number of rx queues, instead, it is used as the
3221 * index of the first rx queue used by FCoE.
3222 *
3223 **/
3224 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
3225 {
3226 bool ret = false;
3227 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3228
3229 f->indices = min((int)num_online_cpus(), f->indices);
3230 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3231 adapter->num_rx_queues = 1;
3232 adapter->num_tx_queues = 1;
3233 #ifdef CONFIG_IXGBE_DCB
3234 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3235 DPRINTK(PROBE, INFO, "FCoE enabled with DCB \n");
3236 ixgbe_set_dcb_queues(adapter);
3237 }
3238 #endif
3239 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3240 DPRINTK(PROBE, INFO, "FCoE enabled with RSS \n");
3241 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3242 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3243 ixgbe_set_fdir_queues(adapter);
3244 else
3245 ixgbe_set_rss_queues(adapter);
3246 }
3247 /* adding FCoE rx rings to the end */
3248 f->mask = adapter->num_rx_queues;
3249 adapter->num_rx_queues += f->indices;
3250 adapter->num_tx_queues += f->indices;
3251
3252 ret = true;
3253 }
3254
3255 return ret;
3256 }
3257
3258 #endif /* IXGBE_FCOE */
3259 /*
3260 * ixgbe_set_num_queues: Allocate queues for device, feature dependant
3261 * @adapter: board private structure to initialize
3262 *
3263 * This is the top level queue allocation routine. The order here is very
3264 * important, starting with the "most" number of features turned on at once,
3265 * and ending with the smallest set of features. This way large combinations
3266 * can be allocated if they're turned on, and smaller combinations are the
3267 * fallthrough conditions.
3268 *
3269 **/
3270 static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
3271 {
3272 #ifdef IXGBE_FCOE
3273 if (ixgbe_set_fcoe_queues(adapter))
3274 goto done;
3275
3276 #endif /* IXGBE_FCOE */
3277 #ifdef CONFIG_IXGBE_DCB
3278 if (ixgbe_set_dcb_queues(adapter))
3279 goto done;
3280
3281 #endif
3282 if (ixgbe_set_fdir_queues(adapter))
3283 goto done;
3284
3285 if (ixgbe_set_rss_queues(adapter))
3286 goto done;
3287
3288 /* fallback to base case */
3289 adapter->num_rx_queues = 1;
3290 adapter->num_tx_queues = 1;
3291
3292 done:
3293 /* Notify the stack of the (possibly) reduced Tx Queue count. */
3294 adapter->netdev->real_num_tx_queues = adapter->num_tx_queues;
3295 }
3296
3297 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
3298 int vectors)
3299 {
3300 int err, vector_threshold;
3301
3302 /* We'll want at least 3 (vector_threshold):
3303 * 1) TxQ[0] Cleanup
3304 * 2) RxQ[0] Cleanup
3305 * 3) Other (Link Status Change, etc.)
3306 * 4) TCP Timer (optional)
3307 */
3308 vector_threshold = MIN_MSIX_COUNT;
3309
3310 /* The more we get, the more we will assign to Tx/Rx Cleanup
3311 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
3312 * Right now, we simply care about how many we'll get; we'll
3313 * set them up later while requesting irq's.
3314 */
3315 while (vectors >= vector_threshold) {
3316 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
3317 vectors);
3318 if (!err) /* Success in acquiring all requested vectors. */
3319 break;
3320 else if (err < 0)
3321 vectors = 0; /* Nasty failure, quit now */
3322 else /* err == number of vectors we should try again with */
3323 vectors = err;
3324 }
3325
3326 if (vectors < vector_threshold) {
3327 /* Can't allocate enough MSI-X interrupts? Oh well.
3328 * This just means we'll go with either a single MSI
3329 * vector or fall back to legacy interrupts.
3330 */
3331 DPRINTK(HW, DEBUG, "Unable to allocate MSI-X interrupts\n");
3332 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3333 kfree(adapter->msix_entries);
3334 adapter->msix_entries = NULL;
3335 } else {
3336 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
3337 /*
3338 * Adjust for only the vectors we'll use, which is minimum
3339 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
3340 * vectors we were allocated.
3341 */
3342 adapter->num_msix_vectors = min(vectors,
3343 adapter->max_msix_q_vectors + NON_Q_VECTORS);
3344 }
3345 }
3346
3347 /**
3348 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
3349 * @adapter: board private structure to initialize
3350 *
3351 * Cache the descriptor ring offsets for RSS to the assigned rings.
3352 *
3353 **/
3354 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
3355 {
3356 int i;
3357 bool ret = false;
3358
3359 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3360 for (i = 0; i < adapter->num_rx_queues; i++)
3361 adapter->rx_ring[i].reg_idx = i;
3362 for (i = 0; i < adapter->num_tx_queues; i++)
3363 adapter->tx_ring[i].reg_idx = i;
3364 ret = true;
3365 } else {
3366 ret = false;
3367 }
3368
3369 return ret;
3370 }
3371
3372 #ifdef CONFIG_IXGBE_DCB
3373 /**
3374 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
3375 * @adapter: board private structure to initialize
3376 *
3377 * Cache the descriptor ring offsets for DCB to the assigned rings.
3378 *
3379 **/
3380 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
3381 {
3382 int i;
3383 bool ret = false;
3384 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
3385
3386 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3387 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
3388 /* the number of queues is assumed to be symmetric */
3389 for (i = 0; i < dcb_i; i++) {
3390 adapter->rx_ring[i].reg_idx = i << 3;
3391 adapter->tx_ring[i].reg_idx = i << 2;
3392 }
3393 ret = true;
3394 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
3395 if (dcb_i == 8) {
3396 /*
3397 * Tx TC0 starts at: descriptor queue 0
3398 * Tx TC1 starts at: descriptor queue 32
3399 * Tx TC2 starts at: descriptor queue 64
3400 * Tx TC3 starts at: descriptor queue 80
3401 * Tx TC4 starts at: descriptor queue 96
3402 * Tx TC5 starts at: descriptor queue 104
3403 * Tx TC6 starts at: descriptor queue 112
3404 * Tx TC7 starts at: descriptor queue 120
3405 *
3406 * Rx TC0-TC7 are offset by 16 queues each
3407 */
3408 for (i = 0; i < 3; i++) {
3409 adapter->tx_ring[i].reg_idx = i << 5;
3410 adapter->rx_ring[i].reg_idx = i << 4;
3411 }
3412 for ( ; i < 5; i++) {
3413 adapter->tx_ring[i].reg_idx =
3414 ((i + 2) << 4);
3415 adapter->rx_ring[i].reg_idx = i << 4;
3416 }
3417 for ( ; i < dcb_i; i++) {
3418 adapter->tx_ring[i].reg_idx =
3419 ((i + 8) << 3);
3420 adapter->rx_ring[i].reg_idx = i << 4;
3421 }
3422
3423 ret = true;
3424 } else if (dcb_i == 4) {
3425 /*
3426 * Tx TC0 starts at: descriptor queue 0
3427 * Tx TC1 starts at: descriptor queue 64
3428 * Tx TC2 starts at: descriptor queue 96
3429 * Tx TC3 starts at: descriptor queue 112
3430 *
3431 * Rx TC0-TC3 are offset by 32 queues each
3432 */
3433 adapter->tx_ring[0].reg_idx = 0;
3434 adapter->tx_ring[1].reg_idx = 64;
3435 adapter->tx_ring[2].reg_idx = 96;
3436 adapter->tx_ring[3].reg_idx = 112;
3437 for (i = 0 ; i < dcb_i; i++)
3438 adapter->rx_ring[i].reg_idx = i << 5;
3439
3440 ret = true;
3441 } else {
3442 ret = false;
3443 }
3444 } else {
3445 ret = false;
3446 }
3447 } else {
3448 ret = false;
3449 }
3450
3451 return ret;
3452 }
3453 #endif
3454
3455 /**
3456 * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
3457 * @adapter: board private structure to initialize
3458 *
3459 * Cache the descriptor ring offsets for Flow Director to the assigned rings.
3460 *
3461 **/
3462 static bool inline ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
3463 {
3464 int i;
3465 bool ret = false;
3466
3467 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3468 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3469 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))) {
3470 for (i = 0; i < adapter->num_rx_queues; i++)
3471 adapter->rx_ring[i].reg_idx = i;
3472 for (i = 0; i < adapter->num_tx_queues; i++)
3473 adapter->tx_ring[i].reg_idx = i;
3474 ret = true;
3475 }
3476
3477 return ret;
3478 }
3479
3480 #ifdef IXGBE_FCOE
3481 /**
3482 * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
3483 * @adapter: board private structure to initialize
3484 *
3485 * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
3486 *
3487 */
3488 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
3489 {
3490 int i, fcoe_rx_i = 0, fcoe_tx_i = 0;
3491 bool ret = false;
3492 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3493
3494 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3495 #ifdef CONFIG_IXGBE_DCB
3496 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3497 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
3498
3499 ixgbe_cache_ring_dcb(adapter);
3500 /* find out queues in TC for FCoE */
3501 fcoe_rx_i = adapter->rx_ring[fcoe->tc].reg_idx + 1;
3502 fcoe_tx_i = adapter->tx_ring[fcoe->tc].reg_idx + 1;
3503 /*
3504 * In 82599, the number of Tx queues for each traffic
3505 * class for both 8-TC and 4-TC modes are:
3506 * TCs : TC0 TC1 TC2 TC3 TC4 TC5 TC6 TC7
3507 * 8 TCs: 32 32 16 16 8 8 8 8
3508 * 4 TCs: 64 64 32 32
3509 * We have max 8 queues for FCoE, where 8 the is
3510 * FCoE redirection table size. If TC for FCoE is
3511 * less than or equal to TC3, we have enough queues
3512 * to add max of 8 queues for FCoE, so we start FCoE
3513 * tx descriptor from the next one, i.e., reg_idx + 1.
3514 * If TC for FCoE is above TC3, implying 8 TC mode,
3515 * and we need 8 for FCoE, we have to take all queues
3516 * in that traffic class for FCoE.
3517 */
3518 if ((f->indices == IXGBE_FCRETA_SIZE) && (fcoe->tc > 3))
3519 fcoe_tx_i--;
3520 }
3521 #endif /* CONFIG_IXGBE_DCB */
3522 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3523 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3524 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3525 ixgbe_cache_ring_fdir(adapter);
3526 else
3527 ixgbe_cache_ring_rss(adapter);
3528
3529 fcoe_rx_i = f->mask;
3530 fcoe_tx_i = f->mask;
3531 }
3532 for (i = 0; i < f->indices; i++, fcoe_rx_i++, fcoe_tx_i++) {
3533 adapter->rx_ring[f->mask + i].reg_idx = fcoe_rx_i;
3534 adapter->tx_ring[f->mask + i].reg_idx = fcoe_tx_i;
3535 }
3536 ret = true;
3537 }
3538 return ret;
3539 }
3540
3541 #endif /* IXGBE_FCOE */
3542 /**
3543 * ixgbe_cache_ring_register - Descriptor ring to register mapping
3544 * @adapter: board private structure to initialize
3545 *
3546 * Once we know the feature-set enabled for the device, we'll cache
3547 * the register offset the descriptor ring is assigned to.
3548 *
3549 * Note, the order the various feature calls is important. It must start with
3550 * the "most" features enabled at the same time, then trickle down to the
3551 * least amount of features turned on at once.
3552 **/
3553 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
3554 {
3555 /* start with default case */
3556 adapter->rx_ring[0].reg_idx = 0;
3557 adapter->tx_ring[0].reg_idx = 0;
3558
3559 #ifdef IXGBE_FCOE
3560 if (ixgbe_cache_ring_fcoe(adapter))
3561 return;
3562
3563 #endif /* IXGBE_FCOE */
3564 #ifdef CONFIG_IXGBE_DCB
3565 if (ixgbe_cache_ring_dcb(adapter))
3566 return;
3567
3568 #endif
3569 if (ixgbe_cache_ring_fdir(adapter))
3570 return;
3571
3572 if (ixgbe_cache_ring_rss(adapter))
3573 return;
3574 }
3575
3576 /**
3577 * ixgbe_alloc_queues - Allocate memory for all rings
3578 * @adapter: board private structure to initialize
3579 *
3580 * We allocate one ring per queue at run-time since we don't know the
3581 * number of queues at compile-time. The polling_netdev array is
3582 * intended for Multiqueue, but should work fine with a single queue.
3583 **/
3584 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
3585 {
3586 int i;
3587
3588 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
3589 sizeof(struct ixgbe_ring), GFP_KERNEL);
3590 if (!adapter->tx_ring)
3591 goto err_tx_ring_allocation;
3592
3593 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
3594 sizeof(struct ixgbe_ring), GFP_KERNEL);
3595 if (!adapter->rx_ring)
3596 goto err_rx_ring_allocation;
3597
3598 for (i = 0; i < adapter->num_tx_queues; i++) {
3599 adapter->tx_ring[i].count = adapter->tx_ring_count;
3600 adapter->tx_ring[i].queue_index = i;
3601 }
3602
3603 for (i = 0; i < adapter->num_rx_queues; i++) {
3604 adapter->rx_ring[i].count = adapter->rx_ring_count;
3605 adapter->rx_ring[i].queue_index = i;
3606 }
3607
3608 ixgbe_cache_ring_register(adapter);
3609
3610 return 0;
3611
3612 err_rx_ring_allocation:
3613 kfree(adapter->tx_ring);
3614 err_tx_ring_allocation:
3615 return -ENOMEM;
3616 }
3617
3618 /**
3619 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
3620 * @adapter: board private structure to initialize
3621 *
3622 * Attempt to configure the interrupts using the best available
3623 * capabilities of the hardware and the kernel.
3624 **/
3625 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
3626 {
3627 struct ixgbe_hw *hw = &adapter->hw;
3628 int err = 0;
3629 int vector, v_budget;
3630
3631 /*
3632 * It's easy to be greedy for MSI-X vectors, but it really
3633 * doesn't do us much good if we have a lot more vectors
3634 * than CPU's. So let's be conservative and only ask for
3635 * (roughly) twice the number of vectors as there are CPU's.
3636 */
3637 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
3638 (int)(num_online_cpus() * 2)) + NON_Q_VECTORS;
3639
3640 /*
3641 * At the same time, hardware can only support a maximum of
3642 * hw.mac->max_msix_vectors vectors. With features
3643 * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
3644 * descriptor queues supported by our device. Thus, we cap it off in
3645 * those rare cases where the cpu count also exceeds our vector limit.
3646 */
3647 v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
3648
3649 /* A failure in MSI-X entry allocation isn't fatal, but it does
3650 * mean we disable MSI-X capabilities of the adapter. */
3651 adapter->msix_entries = kcalloc(v_budget,
3652 sizeof(struct msix_entry), GFP_KERNEL);
3653 if (adapter->msix_entries) {
3654 for (vector = 0; vector < v_budget; vector++)
3655 adapter->msix_entries[vector].entry = vector;
3656
3657 ixgbe_acquire_msix_vectors(adapter, v_budget);
3658
3659 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3660 goto out;
3661 }
3662
3663 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
3664 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
3665 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3666 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3667 adapter->atr_sample_rate = 0;
3668 ixgbe_set_num_queues(adapter);
3669
3670 err = pci_enable_msi(adapter->pdev);
3671 if (!err) {
3672 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
3673 } else {
3674 DPRINTK(HW, DEBUG, "Unable to allocate MSI interrupt, "
3675 "falling back to legacy. Error: %d\n", err);
3676 /* reset err */
3677 err = 0;
3678 }
3679
3680 out:
3681 return err;
3682 }
3683
3684 /**
3685 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
3686 * @adapter: board private structure to initialize
3687 *
3688 * We allocate one q_vector per queue interrupt. If allocation fails we
3689 * return -ENOMEM.
3690 **/
3691 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
3692 {
3693 int q_idx, num_q_vectors;
3694 struct ixgbe_q_vector *q_vector;
3695 int napi_vectors;
3696 int (*poll)(struct napi_struct *, int);
3697
3698 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3699 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3700 napi_vectors = adapter->num_rx_queues;
3701 poll = &ixgbe_clean_rxtx_many;
3702 } else {
3703 num_q_vectors = 1;
3704 napi_vectors = 1;
3705 poll = &ixgbe_poll;
3706 }
3707
3708 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3709 q_vector = kzalloc(sizeof(struct ixgbe_q_vector), GFP_KERNEL);
3710 if (!q_vector)
3711 goto err_out;
3712 q_vector->adapter = adapter;
3713 if (q_vector->txr_count && !q_vector->rxr_count)
3714 q_vector->eitr = adapter->tx_eitr_param;
3715 else
3716 q_vector->eitr = adapter->rx_eitr_param;
3717 q_vector->v_idx = q_idx;
3718 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
3719 adapter->q_vector[q_idx] = q_vector;
3720 }
3721
3722 return 0;
3723
3724 err_out:
3725 while (q_idx) {
3726 q_idx--;
3727 q_vector = adapter->q_vector[q_idx];
3728 netif_napi_del(&q_vector->napi);
3729 kfree(q_vector);
3730 adapter->q_vector[q_idx] = NULL;
3731 }
3732 return -ENOMEM;
3733 }
3734
3735 /**
3736 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
3737 * @adapter: board private structure to initialize
3738 *
3739 * This function frees the memory allocated to the q_vectors. In addition if
3740 * NAPI is enabled it will delete any references to the NAPI struct prior
3741 * to freeing the q_vector.
3742 **/
3743 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
3744 {
3745 int q_idx, num_q_vectors;
3746
3747 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3748 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3749 else
3750 num_q_vectors = 1;
3751
3752 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3753 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
3754 adapter->q_vector[q_idx] = NULL;
3755 netif_napi_del(&q_vector->napi);
3756 kfree(q_vector);
3757 }
3758 }
3759
3760 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
3761 {
3762 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3763 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3764 pci_disable_msix(adapter->pdev);
3765 kfree(adapter->msix_entries);
3766 adapter->msix_entries = NULL;
3767 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
3768 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
3769 pci_disable_msi(adapter->pdev);
3770 }
3771 return;
3772 }
3773
3774 /**
3775 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
3776 * @adapter: board private structure to initialize
3777 *
3778 * We determine which interrupt scheme to use based on...
3779 * - Kernel support (MSI, MSI-X)
3780 * - which can be user-defined (via MODULE_PARAM)
3781 * - Hardware queue count (num_*_queues)
3782 * - defined by miscellaneous hardware support/features (RSS, etc.)
3783 **/
3784 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
3785 {
3786 int err;
3787
3788 /* Number of supported queues */
3789 ixgbe_set_num_queues(adapter);
3790
3791 err = ixgbe_set_interrupt_capability(adapter);
3792 if (err) {
3793 DPRINTK(PROBE, ERR, "Unable to setup interrupt capabilities\n");
3794 goto err_set_interrupt;
3795 }
3796
3797 err = ixgbe_alloc_q_vectors(adapter);
3798 if (err) {
3799 DPRINTK(PROBE, ERR, "Unable to allocate memory for queue "
3800 "vectors\n");
3801 goto err_alloc_q_vectors;
3802 }
3803
3804 err = ixgbe_alloc_queues(adapter);
3805 if (err) {
3806 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
3807 goto err_alloc_queues;
3808 }
3809
3810 DPRINTK(DRV, INFO, "Multiqueue %s: Rx Queue count = %u, "
3811 "Tx Queue count = %u\n",
3812 (adapter->num_rx_queues > 1) ? "Enabled" :
3813 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
3814
3815 set_bit(__IXGBE_DOWN, &adapter->state);
3816
3817 return 0;
3818
3819 err_alloc_queues:
3820 ixgbe_free_q_vectors(adapter);
3821 err_alloc_q_vectors:
3822 ixgbe_reset_interrupt_capability(adapter);
3823 err_set_interrupt:
3824 return err;
3825 }
3826
3827 /**
3828 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
3829 * @adapter: board private structure to clear interrupt scheme on
3830 *
3831 * We go through and clear interrupt specific resources and reset the structure
3832 * to pre-load conditions
3833 **/
3834 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
3835 {
3836 kfree(adapter->tx_ring);
3837 kfree(adapter->rx_ring);
3838 adapter->tx_ring = NULL;
3839 adapter->rx_ring = NULL;
3840
3841 ixgbe_free_q_vectors(adapter);
3842 ixgbe_reset_interrupt_capability(adapter);
3843 }
3844
3845 /**
3846 * ixgbe_sfp_timer - worker thread to find a missing module
3847 * @data: pointer to our adapter struct
3848 **/
3849 static void ixgbe_sfp_timer(unsigned long data)
3850 {
3851 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
3852
3853 /*
3854 * Do the sfp_timer outside of interrupt context due to the
3855 * delays that sfp+ detection requires
3856 */
3857 schedule_work(&adapter->sfp_task);
3858 }
3859
3860 /**
3861 * ixgbe_sfp_task - worker thread to find a missing module
3862 * @work: pointer to work_struct containing our data
3863 **/
3864 static void ixgbe_sfp_task(struct work_struct *work)
3865 {
3866 struct ixgbe_adapter *adapter = container_of(work,
3867 struct ixgbe_adapter,
3868 sfp_task);
3869 struct ixgbe_hw *hw = &adapter->hw;
3870
3871 if ((hw->phy.type == ixgbe_phy_nl) &&
3872 (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
3873 s32 ret = hw->phy.ops.identify_sfp(hw);
3874 if (ret == IXGBE_ERR_SFP_NOT_PRESENT)
3875 goto reschedule;
3876 ret = hw->phy.ops.reset(hw);
3877 if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
3878 dev_err(&adapter->pdev->dev, "failed to initialize "
3879 "because an unsupported SFP+ module type "
3880 "was detected.\n"
3881 "Reload the driver after installing a "
3882 "supported module.\n");
3883 unregister_netdev(adapter->netdev);
3884 } else {
3885 DPRINTK(PROBE, INFO, "detected SFP+: %d\n",
3886 hw->phy.sfp_type);
3887 }
3888 /* don't need this routine any more */
3889 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3890 }
3891 return;
3892 reschedule:
3893 if (test_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state))
3894 mod_timer(&adapter->sfp_timer,
3895 round_jiffies(jiffies + (2 * HZ)));
3896 }
3897
3898 /**
3899 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
3900 * @adapter: board private structure to initialize
3901 *
3902 * ixgbe_sw_init initializes the Adapter private data structure.
3903 * Fields are initialized based on PCI device information and
3904 * OS network device settings (MTU size).
3905 **/
3906 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
3907 {
3908 struct ixgbe_hw *hw = &adapter->hw;
3909 struct pci_dev *pdev = adapter->pdev;
3910 unsigned int rss;
3911 #ifdef CONFIG_IXGBE_DCB
3912 int j;
3913 struct tc_configuration *tc;
3914 #endif
3915
3916 /* PCI config space info */
3917
3918 hw->vendor_id = pdev->vendor;
3919 hw->device_id = pdev->device;
3920 hw->revision_id = pdev->revision;
3921 hw->subsystem_vendor_id = pdev->subsystem_vendor;
3922 hw->subsystem_device_id = pdev->subsystem_device;
3923
3924 /* Set capability flags */
3925 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
3926 adapter->ring_feature[RING_F_RSS].indices = rss;
3927 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
3928 adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
3929 if (hw->mac.type == ixgbe_mac_82598EB) {
3930 if (hw->device_id == IXGBE_DEV_ID_82598AT)
3931 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
3932 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
3933 } else if (hw->mac.type == ixgbe_mac_82599EB) {
3934 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
3935 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
3936 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
3937 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
3938 adapter->ring_feature[RING_F_FDIR].indices =
3939 IXGBE_MAX_FDIR_INDICES;
3940 adapter->atr_sample_rate = 20;
3941 adapter->fdir_pballoc = 0;
3942 #ifdef IXGBE_FCOE
3943 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
3944 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
3945 adapter->ring_feature[RING_F_FCOE].indices = 0;
3946 /* Default traffic class to use for FCoE */
3947 adapter->fcoe.tc = IXGBE_FCOE_DEFTC;
3948 #endif /* IXGBE_FCOE */
3949 }
3950
3951 #ifdef CONFIG_IXGBE_DCB
3952 /* Configure DCB traffic classes */
3953 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
3954 tc = &adapter->dcb_cfg.tc_config[j];
3955 tc->path[DCB_TX_CONFIG].bwg_id = 0;
3956 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
3957 tc->path[DCB_RX_CONFIG].bwg_id = 0;
3958 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
3959 tc->dcb_pfc = pfc_disabled;
3960 }
3961 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
3962 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
3963 adapter->dcb_cfg.rx_pba_cfg = pba_equal;
3964 adapter->dcb_cfg.pfc_mode_enable = false;
3965 adapter->dcb_cfg.round_robin_enable = false;
3966 adapter->dcb_set_bitmap = 0x00;
3967 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
3968 adapter->ring_feature[RING_F_DCB].indices);
3969
3970 #endif
3971
3972 /* default flow control settings */
3973 hw->fc.requested_mode = ixgbe_fc_full;
3974 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
3975 #ifdef CONFIG_DCB
3976 adapter->last_lfc_mode = hw->fc.current_mode;
3977 #endif
3978 hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
3979 hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
3980 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
3981 hw->fc.send_xon = true;
3982 hw->fc.disable_fc_autoneg = false;
3983
3984 /* enable itr by default in dynamic mode */
3985 adapter->rx_itr_setting = 1;
3986 adapter->rx_eitr_param = 20000;
3987 adapter->tx_itr_setting = 1;
3988 adapter->tx_eitr_param = 10000;
3989
3990 /* set defaults for eitr in MegaBytes */
3991 adapter->eitr_low = 10;
3992 adapter->eitr_high = 20;
3993
3994 /* set default ring sizes */
3995 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
3996 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
3997
3998 /* initialize eeprom parameters */
3999 if (ixgbe_init_eeprom_params_generic(hw)) {
4000 dev_err(&pdev->dev, "EEPROM initialization failed\n");
4001 return -EIO;
4002 }
4003
4004 /* enable rx csum by default */
4005 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
4006
4007 set_bit(__IXGBE_DOWN, &adapter->state);
4008
4009 return 0;
4010 }
4011
4012 /**
4013 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
4014 * @adapter: board private structure
4015 * @tx_ring: tx descriptor ring (for a specific queue) to setup
4016 *
4017 * Return 0 on success, negative on failure
4018 **/
4019 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
4020 struct ixgbe_ring *tx_ring)
4021 {
4022 struct pci_dev *pdev = adapter->pdev;
4023 int size;
4024
4025 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
4026 tx_ring->tx_buffer_info = vmalloc(size);
4027 if (!tx_ring->tx_buffer_info)
4028 goto err;
4029 memset(tx_ring->tx_buffer_info, 0, size);
4030
4031 /* round up to nearest 4K */
4032 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
4033 tx_ring->size = ALIGN(tx_ring->size, 4096);
4034
4035 tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
4036 &tx_ring->dma);
4037 if (!tx_ring->desc)
4038 goto err;
4039
4040 tx_ring->next_to_use = 0;
4041 tx_ring->next_to_clean = 0;
4042 tx_ring->work_limit = tx_ring->count;
4043 return 0;
4044
4045 err:
4046 vfree(tx_ring->tx_buffer_info);
4047 tx_ring->tx_buffer_info = NULL;
4048 DPRINTK(PROBE, ERR, "Unable to allocate memory for the transmit "
4049 "descriptor ring\n");
4050 return -ENOMEM;
4051 }
4052
4053 /**
4054 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
4055 * @adapter: board private structure
4056 *
4057 * If this function returns with an error, then it's possible one or
4058 * more of the rings is populated (while the rest are not). It is the
4059 * callers duty to clean those orphaned rings.
4060 *
4061 * Return 0 on success, negative on failure
4062 **/
4063 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
4064 {
4065 int i, err = 0;
4066
4067 for (i = 0; i < adapter->num_tx_queues; i++) {
4068 err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]);
4069 if (!err)
4070 continue;
4071 DPRINTK(PROBE, ERR, "Allocation for Tx Queue %u failed\n", i);
4072 break;
4073 }
4074
4075 return err;
4076 }
4077
4078 /**
4079 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
4080 * @adapter: board private structure
4081 * @rx_ring: rx descriptor ring (for a specific queue) to setup
4082 *
4083 * Returns 0 on success, negative on failure
4084 **/
4085 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
4086 struct ixgbe_ring *rx_ring)
4087 {
4088 struct pci_dev *pdev = adapter->pdev;
4089 int size;
4090
4091 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4092 rx_ring->rx_buffer_info = vmalloc(size);
4093 if (!rx_ring->rx_buffer_info) {
4094 DPRINTK(PROBE, ERR,
4095 "vmalloc allocation failed for the rx desc ring\n");
4096 goto alloc_failed;
4097 }
4098 memset(rx_ring->rx_buffer_info, 0, size);
4099
4100 /* Round up to nearest 4K */
4101 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
4102 rx_ring->size = ALIGN(rx_ring->size, 4096);
4103
4104 rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size, &rx_ring->dma);
4105
4106 if (!rx_ring->desc) {
4107 DPRINTK(PROBE, ERR,
4108 "Memory allocation failed for the rx desc ring\n");
4109 vfree(rx_ring->rx_buffer_info);
4110 goto alloc_failed;
4111 }
4112
4113 rx_ring->next_to_clean = 0;
4114 rx_ring->next_to_use = 0;
4115
4116 return 0;
4117
4118 alloc_failed:
4119 return -ENOMEM;
4120 }
4121
4122 /**
4123 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
4124 * @adapter: board private structure
4125 *
4126 * If this function returns with an error, then it's possible one or
4127 * more of the rings is populated (while the rest are not). It is the
4128 * callers duty to clean those orphaned rings.
4129 *
4130 * Return 0 on success, negative on failure
4131 **/
4132
4133 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
4134 {
4135 int i, err = 0;
4136
4137 for (i = 0; i < adapter->num_rx_queues; i++) {
4138 err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]);
4139 if (!err)
4140 continue;
4141 DPRINTK(PROBE, ERR, "Allocation for Rx Queue %u failed\n", i);
4142 break;
4143 }
4144
4145 return err;
4146 }
4147
4148 /**
4149 * ixgbe_free_tx_resources - Free Tx Resources per Queue
4150 * @adapter: board private structure
4151 * @tx_ring: Tx descriptor ring for a specific queue
4152 *
4153 * Free all transmit software resources
4154 **/
4155 void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
4156 struct ixgbe_ring *tx_ring)
4157 {
4158 struct pci_dev *pdev = adapter->pdev;
4159
4160 ixgbe_clean_tx_ring(adapter, tx_ring);
4161
4162 vfree(tx_ring->tx_buffer_info);
4163 tx_ring->tx_buffer_info = NULL;
4164
4165 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
4166
4167 tx_ring->desc = NULL;
4168 }
4169
4170 /**
4171 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
4172 * @adapter: board private structure
4173 *
4174 * Free all transmit software resources
4175 **/
4176 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
4177 {
4178 int i;
4179
4180 for (i = 0; i < adapter->num_tx_queues; i++)
4181 if (adapter->tx_ring[i].desc)
4182 ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
4183 }
4184
4185 /**
4186 * ixgbe_free_rx_resources - Free Rx Resources
4187 * @adapter: board private structure
4188 * @rx_ring: ring to clean the resources from
4189 *
4190 * Free all receive software resources
4191 **/
4192 void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
4193 struct ixgbe_ring *rx_ring)
4194 {
4195 struct pci_dev *pdev = adapter->pdev;
4196
4197 ixgbe_clean_rx_ring(adapter, rx_ring);
4198
4199 vfree(rx_ring->rx_buffer_info);
4200 rx_ring->rx_buffer_info = NULL;
4201
4202 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
4203
4204 rx_ring->desc = NULL;
4205 }
4206
4207 /**
4208 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
4209 * @adapter: board private structure
4210 *
4211 * Free all receive software resources
4212 **/
4213 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
4214 {
4215 int i;
4216
4217 for (i = 0; i < adapter->num_rx_queues; i++)
4218 if (adapter->rx_ring[i].desc)
4219 ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
4220 }
4221
4222 /**
4223 * ixgbe_change_mtu - Change the Maximum Transfer Unit
4224 * @netdev: network interface device structure
4225 * @new_mtu: new value for maximum frame size
4226 *
4227 * Returns 0 on success, negative on failure
4228 **/
4229 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
4230 {
4231 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4232 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4233
4234 /* MTU < 68 is an error and causes problems on some kernels */
4235 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
4236 return -EINVAL;
4237
4238 DPRINTK(PROBE, INFO, "changing MTU from %d to %d\n",
4239 netdev->mtu, new_mtu);
4240 /* must set new MTU before calling down or up */
4241 netdev->mtu = new_mtu;
4242
4243 if (netif_running(netdev))
4244 ixgbe_reinit_locked(adapter);
4245
4246 return 0;
4247 }
4248
4249 /**
4250 * ixgbe_open - Called when a network interface is made active
4251 * @netdev: network interface device structure
4252 *
4253 * Returns 0 on success, negative value on failure
4254 *
4255 * The open entry point is called when a network interface is made
4256 * active by the system (IFF_UP). At this point all resources needed
4257 * for transmit and receive operations are allocated, the interrupt
4258 * handler is registered with the OS, the watchdog timer is started,
4259 * and the stack is notified that the interface is ready.
4260 **/
4261 static int ixgbe_open(struct net_device *netdev)
4262 {
4263 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4264 int err;
4265
4266 /* disallow open during test */
4267 if (test_bit(__IXGBE_TESTING, &adapter->state))
4268 return -EBUSY;
4269
4270 netif_carrier_off(netdev);
4271
4272 /* allocate transmit descriptors */
4273 err = ixgbe_setup_all_tx_resources(adapter);
4274 if (err)
4275 goto err_setup_tx;
4276
4277 /* allocate receive descriptors */
4278 err = ixgbe_setup_all_rx_resources(adapter);
4279 if (err)
4280 goto err_setup_rx;
4281
4282 ixgbe_configure(adapter);
4283
4284 err = ixgbe_request_irq(adapter);
4285 if (err)
4286 goto err_req_irq;
4287
4288 err = ixgbe_up_complete(adapter);
4289 if (err)
4290 goto err_up;
4291
4292 netif_tx_start_all_queues(netdev);
4293
4294 return 0;
4295
4296 err_up:
4297 ixgbe_release_hw_control(adapter);
4298 ixgbe_free_irq(adapter);
4299 err_req_irq:
4300 err_setup_rx:
4301 ixgbe_free_all_rx_resources(adapter);
4302 err_setup_tx:
4303 ixgbe_free_all_tx_resources(adapter);
4304 ixgbe_reset(adapter);
4305
4306 return err;
4307 }
4308
4309 /**
4310 * ixgbe_close - Disables a network interface
4311 * @netdev: network interface device structure
4312 *
4313 * Returns 0, this is not allowed to fail
4314 *
4315 * The close entry point is called when an interface is de-activated
4316 * by the OS. The hardware is still under the drivers control, but
4317 * needs to be disabled. A global MAC reset is issued to stop the
4318 * hardware, and all transmit and receive resources are freed.
4319 **/
4320 static int ixgbe_close(struct net_device *netdev)
4321 {
4322 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4323
4324 ixgbe_down(adapter);
4325 ixgbe_free_irq(adapter);
4326
4327 ixgbe_free_all_tx_resources(adapter);
4328 ixgbe_free_all_rx_resources(adapter);
4329
4330 ixgbe_release_hw_control(adapter);
4331
4332 return 0;
4333 }
4334
4335 #ifdef CONFIG_PM
4336 static int ixgbe_resume(struct pci_dev *pdev)
4337 {
4338 struct net_device *netdev = pci_get_drvdata(pdev);
4339 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4340 u32 err;
4341
4342 pci_set_power_state(pdev, PCI_D0);
4343 pci_restore_state(pdev);
4344
4345 err = pci_enable_device_mem(pdev);
4346 if (err) {
4347 printk(KERN_ERR "ixgbe: Cannot enable PCI device from "
4348 "suspend\n");
4349 return err;
4350 }
4351 pci_set_master(pdev);
4352
4353 pci_wake_from_d3(pdev, false);
4354
4355 err = ixgbe_init_interrupt_scheme(adapter);
4356 if (err) {
4357 printk(KERN_ERR "ixgbe: Cannot initialize interrupts for "
4358 "device\n");
4359 return err;
4360 }
4361
4362 ixgbe_reset(adapter);
4363
4364 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
4365
4366 if (netif_running(netdev)) {
4367 err = ixgbe_open(adapter->netdev);
4368 if (err)
4369 return err;
4370 }
4371
4372 netif_device_attach(netdev);
4373
4374 return 0;
4375 }
4376 #endif /* CONFIG_PM */
4377
4378 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
4379 {
4380 struct net_device *netdev = pci_get_drvdata(pdev);
4381 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4382 struct ixgbe_hw *hw = &adapter->hw;
4383 u32 ctrl, fctrl;
4384 u32 wufc = adapter->wol;
4385 #ifdef CONFIG_PM
4386 int retval = 0;
4387 #endif
4388
4389 netif_device_detach(netdev);
4390
4391 if (netif_running(netdev)) {
4392 ixgbe_down(adapter);
4393 ixgbe_free_irq(adapter);
4394 ixgbe_free_all_tx_resources(adapter);
4395 ixgbe_free_all_rx_resources(adapter);
4396 }
4397 ixgbe_clear_interrupt_scheme(adapter);
4398
4399 #ifdef CONFIG_PM
4400 retval = pci_save_state(pdev);
4401 if (retval)
4402 return retval;
4403
4404 #endif
4405 if (wufc) {
4406 ixgbe_set_rx_mode(netdev);
4407
4408 /* turn on all-multi mode if wake on multicast is enabled */
4409 if (wufc & IXGBE_WUFC_MC) {
4410 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4411 fctrl |= IXGBE_FCTRL_MPE;
4412 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
4413 }
4414
4415 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
4416 ctrl |= IXGBE_CTRL_GIO_DIS;
4417 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
4418
4419 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
4420 } else {
4421 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
4422 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
4423 }
4424
4425 if (wufc && hw->mac.type == ixgbe_mac_82599EB)
4426 pci_wake_from_d3(pdev, true);
4427 else
4428 pci_wake_from_d3(pdev, false);
4429
4430 *enable_wake = !!wufc;
4431
4432 ixgbe_release_hw_control(adapter);
4433
4434 pci_disable_device(pdev);
4435
4436 return 0;
4437 }
4438
4439 #ifdef CONFIG_PM
4440 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
4441 {
4442 int retval;
4443 bool wake;
4444
4445 retval = __ixgbe_shutdown(pdev, &wake);
4446 if (retval)
4447 return retval;
4448
4449 if (wake) {
4450 pci_prepare_to_sleep(pdev);
4451 } else {
4452 pci_wake_from_d3(pdev, false);
4453 pci_set_power_state(pdev, PCI_D3hot);
4454 }
4455
4456 return 0;
4457 }
4458 #endif /* CONFIG_PM */
4459
4460 static void ixgbe_shutdown(struct pci_dev *pdev)
4461 {
4462 bool wake;
4463
4464 __ixgbe_shutdown(pdev, &wake);
4465
4466 if (system_state == SYSTEM_POWER_OFF) {
4467 pci_wake_from_d3(pdev, wake);
4468 pci_set_power_state(pdev, PCI_D3hot);
4469 }
4470 }
4471
4472 /**
4473 * ixgbe_update_stats - Update the board statistics counters.
4474 * @adapter: board private structure
4475 **/
4476 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
4477 {
4478 struct ixgbe_hw *hw = &adapter->hw;
4479 u64 total_mpc = 0;
4480 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
4481
4482 if (hw->mac.type == ixgbe_mac_82599EB) {
4483 u64 rsc_count = 0;
4484 for (i = 0; i < 16; i++)
4485 adapter->hw_rx_no_dma_resources +=
4486 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4487 for (i = 0; i < adapter->num_rx_queues; i++)
4488 rsc_count += adapter->rx_ring[i].rsc_count;
4489 adapter->rsc_count = rsc_count;
4490 }
4491
4492 adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
4493 for (i = 0; i < 8; i++) {
4494 /* for packet buffers not used, the register should read 0 */
4495 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
4496 missed_rx += mpc;
4497 adapter->stats.mpc[i] += mpc;
4498 total_mpc += adapter->stats.mpc[i];
4499 if (hw->mac.type == ixgbe_mac_82598EB)
4500 adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
4501 adapter->stats.qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
4502 adapter->stats.qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
4503 adapter->stats.qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
4504 adapter->stats.qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
4505 if (hw->mac.type == ixgbe_mac_82599EB) {
4506 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4507 IXGBE_PXONRXCNT(i));
4508 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4509 IXGBE_PXOFFRXCNT(i));
4510 adapter->stats.qprdc[i] += IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4511 } else {
4512 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4513 IXGBE_PXONRXC(i));
4514 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4515 IXGBE_PXOFFRXC(i));
4516 }
4517 adapter->stats.pxontxc[i] += IXGBE_READ_REG(hw,
4518 IXGBE_PXONTXC(i));
4519 adapter->stats.pxofftxc[i] += IXGBE_READ_REG(hw,
4520 IXGBE_PXOFFTXC(i));
4521 }
4522 adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
4523 /* work around hardware counting issue */
4524 adapter->stats.gprc -= missed_rx;
4525
4526 /* 82598 hardware only has a 32 bit counter in the high register */
4527 if (hw->mac.type == ixgbe_mac_82599EB) {
4528 u64 tmp;
4529 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
4530 tmp = IXGBE_READ_REG(hw, IXGBE_GORCH) & 0xF; /* 4 high bits of GORC */
4531 adapter->stats.gorc += (tmp << 32);
4532 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
4533 tmp = IXGBE_READ_REG(hw, IXGBE_GOTCH) & 0xF; /* 4 high bits of GOTC */
4534 adapter->stats.gotc += (tmp << 32);
4535 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORL);
4536 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
4537 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
4538 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
4539 adapter->stats.fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
4540 adapter->stats.fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
4541 #ifdef IXGBE_FCOE
4542 adapter->stats.fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
4543 adapter->stats.fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
4544 adapter->stats.fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
4545 adapter->stats.fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
4546 adapter->stats.fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
4547 adapter->stats.fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
4548 #endif /* IXGBE_FCOE */
4549 } else {
4550 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
4551 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
4552 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
4553 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
4554 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
4555 }
4556 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
4557 adapter->stats.bprc += bprc;
4558 adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
4559 if (hw->mac.type == ixgbe_mac_82598EB)
4560 adapter->stats.mprc -= bprc;
4561 adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
4562 adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
4563 adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
4564 adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
4565 adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
4566 adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
4567 adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
4568 adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
4569 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
4570 adapter->stats.lxontxc += lxon;
4571 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
4572 adapter->stats.lxofftxc += lxoff;
4573 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4574 adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
4575 adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
4576 /*
4577 * 82598 errata - tx of flow control packets is included in tx counters
4578 */
4579 xon_off_tot = lxon + lxoff;
4580 adapter->stats.gptc -= xon_off_tot;
4581 adapter->stats.mptc -= xon_off_tot;
4582 adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
4583 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4584 adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
4585 adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
4586 adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
4587 adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
4588 adapter->stats.ptc64 -= xon_off_tot;
4589 adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
4590 adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
4591 adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
4592 adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
4593 adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
4594 adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
4595
4596 /* Fill out the OS statistics structure */
4597 adapter->net_stats.multicast = adapter->stats.mprc;
4598
4599 /* Rx Errors */
4600 adapter->net_stats.rx_errors = adapter->stats.crcerrs +
4601 adapter->stats.rlec;
4602 adapter->net_stats.rx_dropped = 0;
4603 adapter->net_stats.rx_length_errors = adapter->stats.rlec;
4604 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
4605 adapter->net_stats.rx_missed_errors = total_mpc;
4606 }
4607
4608 /**
4609 * ixgbe_watchdog - Timer Call-back
4610 * @data: pointer to adapter cast into an unsigned long
4611 **/
4612 static void ixgbe_watchdog(unsigned long data)
4613 {
4614 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4615 struct ixgbe_hw *hw = &adapter->hw;
4616 u64 eics = 0;
4617 int i;
4618
4619 /*
4620 * Do the watchdog outside of interrupt context due to the lovely
4621 * delays that some of the newer hardware requires
4622 */
4623
4624 if (test_bit(__IXGBE_DOWN, &adapter->state))
4625 goto watchdog_short_circuit;
4626
4627 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
4628 /*
4629 * for legacy and MSI interrupts don't set any bits
4630 * that are enabled for EIAM, because this operation
4631 * would set *both* EIMS and EICS for any bit in EIAM
4632 */
4633 IXGBE_WRITE_REG(hw, IXGBE_EICS,
4634 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
4635 goto watchdog_reschedule;
4636 }
4637
4638 /* get one bit for every active tx/rx interrupt vector */
4639 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
4640 struct ixgbe_q_vector *qv = adapter->q_vector[i];
4641 if (qv->rxr_count || qv->txr_count)
4642 eics |= ((u64)1 << i);
4643 }
4644
4645 /* Cause software interrupt to ensure rx rings are cleaned */
4646 ixgbe_irq_rearm_queues(adapter, eics);
4647
4648 watchdog_reschedule:
4649 /* Reset the timer */
4650 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
4651
4652 watchdog_short_circuit:
4653 schedule_work(&adapter->watchdog_task);
4654 }
4655
4656 /**
4657 * ixgbe_multispeed_fiber_task - worker thread to configure multispeed fiber
4658 * @work: pointer to work_struct containing our data
4659 **/
4660 static void ixgbe_multispeed_fiber_task(struct work_struct *work)
4661 {
4662 struct ixgbe_adapter *adapter = container_of(work,
4663 struct ixgbe_adapter,
4664 multispeed_fiber_task);
4665 struct ixgbe_hw *hw = &adapter->hw;
4666 u32 autoneg;
4667 bool negotiation;
4668
4669 adapter->flags |= IXGBE_FLAG_IN_SFP_LINK_TASK;
4670 autoneg = hw->phy.autoneg_advertised;
4671 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
4672 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
4673 if (hw->mac.ops.setup_link)
4674 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
4675 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
4676 adapter->flags &= ~IXGBE_FLAG_IN_SFP_LINK_TASK;
4677 }
4678
4679 /**
4680 * ixgbe_sfp_config_module_task - worker thread to configure a new SFP+ module
4681 * @work: pointer to work_struct containing our data
4682 **/
4683 static void ixgbe_sfp_config_module_task(struct work_struct *work)
4684 {
4685 struct ixgbe_adapter *adapter = container_of(work,
4686 struct ixgbe_adapter,
4687 sfp_config_module_task);
4688 struct ixgbe_hw *hw = &adapter->hw;
4689 u32 err;
4690
4691 adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
4692
4693 /* Time for electrical oscillations to settle down */
4694 msleep(100);
4695 err = hw->phy.ops.identify_sfp(hw);
4696
4697 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
4698 dev_err(&adapter->pdev->dev, "failed to initialize because "
4699 "an unsupported SFP+ module type was detected.\n"
4700 "Reload the driver after installing a supported "
4701 "module.\n");
4702 unregister_netdev(adapter->netdev);
4703 return;
4704 }
4705 hw->mac.ops.setup_sfp(hw);
4706
4707 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
4708 /* This will also work for DA Twinax connections */
4709 schedule_work(&adapter->multispeed_fiber_task);
4710 adapter->flags &= ~IXGBE_FLAG_IN_SFP_MOD_TASK;
4711 }
4712
4713 /**
4714 * ixgbe_fdir_reinit_task - worker thread to reinit FDIR filter table
4715 * @work: pointer to work_struct containing our data
4716 **/
4717 static void ixgbe_fdir_reinit_task(struct work_struct *work)
4718 {
4719 struct ixgbe_adapter *adapter = container_of(work,
4720 struct ixgbe_adapter,
4721 fdir_reinit_task);
4722 struct ixgbe_hw *hw = &adapter->hw;
4723 int i;
4724
4725 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
4726 for (i = 0; i < adapter->num_tx_queues; i++)
4727 set_bit(__IXGBE_FDIR_INIT_DONE,
4728 &(adapter->tx_ring[i].reinit_state));
4729 } else {
4730 DPRINTK(PROBE, ERR, "failed to finish FDIR re-initialization, "
4731 "ignored adding FDIR ATR filters \n");
4732 }
4733 /* Done FDIR Re-initialization, enable transmits */
4734 netif_tx_start_all_queues(adapter->netdev);
4735 }
4736
4737 /**
4738 * ixgbe_watchdog_task - worker thread to bring link up
4739 * @work: pointer to work_struct containing our data
4740 **/
4741 static void ixgbe_watchdog_task(struct work_struct *work)
4742 {
4743 struct ixgbe_adapter *adapter = container_of(work,
4744 struct ixgbe_adapter,
4745 watchdog_task);
4746 struct net_device *netdev = adapter->netdev;
4747 struct ixgbe_hw *hw = &adapter->hw;
4748 u32 link_speed = adapter->link_speed;
4749 bool link_up = adapter->link_up;
4750 int i;
4751 struct ixgbe_ring *tx_ring;
4752 int some_tx_pending = 0;
4753
4754 adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
4755
4756 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
4757 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
4758 if (link_up) {
4759 #ifdef CONFIG_DCB
4760 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4761 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
4762 hw->mac.ops.fc_enable(hw, i);
4763 } else {
4764 hw->mac.ops.fc_enable(hw, 0);
4765 }
4766 #else
4767 hw->mac.ops.fc_enable(hw, 0);
4768 #endif
4769 }
4770
4771 if (link_up ||
4772 time_after(jiffies, (adapter->link_check_timeout +
4773 IXGBE_TRY_LINK_TIMEOUT))) {
4774 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
4775 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
4776 }
4777 adapter->link_up = link_up;
4778 adapter->link_speed = link_speed;
4779 }
4780
4781 if (link_up) {
4782 if (!netif_carrier_ok(netdev)) {
4783 bool flow_rx, flow_tx;
4784
4785 if (hw->mac.type == ixgbe_mac_82599EB) {
4786 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
4787 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
4788 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
4789 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
4790 } else {
4791 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4792 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
4793 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
4794 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
4795 }
4796
4797 printk(KERN_INFO "ixgbe: %s NIC Link is Up %s, "
4798 "Flow Control: %s\n",
4799 netdev->name,
4800 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
4801 "10 Gbps" :
4802 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
4803 "1 Gbps" : "unknown speed")),
4804 ((flow_rx && flow_tx) ? "RX/TX" :
4805 (flow_rx ? "RX" :
4806 (flow_tx ? "TX" : "None"))));
4807
4808 netif_carrier_on(netdev);
4809 } else {
4810 /* Force detection of hung controller */
4811 adapter->detect_tx_hung = true;
4812 }
4813 } else {
4814 adapter->link_up = false;
4815 adapter->link_speed = 0;
4816 if (netif_carrier_ok(netdev)) {
4817 printk(KERN_INFO "ixgbe: %s NIC Link is Down\n",
4818 netdev->name);
4819 netif_carrier_off(netdev);
4820 }
4821 }
4822
4823 if (!netif_carrier_ok(netdev)) {
4824 for (i = 0; i < adapter->num_tx_queues; i++) {
4825 tx_ring = &adapter->tx_ring[i];
4826 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
4827 some_tx_pending = 1;
4828 break;
4829 }
4830 }
4831
4832 if (some_tx_pending) {
4833 /* We've lost link, so the controller stops DMA,
4834 * but we've got queued Tx work that's never going
4835 * to get done, so reset controller to flush Tx.
4836 * (Do the reset outside of interrupt context).
4837 */
4838 schedule_work(&adapter->reset_task);
4839 }
4840 }
4841
4842 ixgbe_update_stats(adapter);
4843 adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
4844 }
4845
4846 static int ixgbe_tso(struct ixgbe_adapter *adapter,
4847 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
4848 u32 tx_flags, u8 *hdr_len)
4849 {
4850 struct ixgbe_adv_tx_context_desc *context_desc;
4851 unsigned int i;
4852 int err;
4853 struct ixgbe_tx_buffer *tx_buffer_info;
4854 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
4855 u32 mss_l4len_idx, l4len;
4856
4857 if (skb_is_gso(skb)) {
4858 if (skb_header_cloned(skb)) {
4859 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
4860 if (err)
4861 return err;
4862 }
4863 l4len = tcp_hdrlen(skb);
4864 *hdr_len += l4len;
4865
4866 if (skb->protocol == htons(ETH_P_IP)) {
4867 struct iphdr *iph = ip_hdr(skb);
4868 iph->tot_len = 0;
4869 iph->check = 0;
4870 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
4871 iph->daddr, 0,
4872 IPPROTO_TCP,
4873 0);
4874 adapter->hw_tso_ctxt++;
4875 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
4876 ipv6_hdr(skb)->payload_len = 0;
4877 tcp_hdr(skb)->check =
4878 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
4879 &ipv6_hdr(skb)->daddr,
4880 0, IPPROTO_TCP, 0);
4881 adapter->hw_tso6_ctxt++;
4882 }
4883
4884 i = tx_ring->next_to_use;
4885
4886 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4887 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4888
4889 /* VLAN MACLEN IPLEN */
4890 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4891 vlan_macip_lens |=
4892 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4893 vlan_macip_lens |= ((skb_network_offset(skb)) <<
4894 IXGBE_ADVTXD_MACLEN_SHIFT);
4895 *hdr_len += skb_network_offset(skb);
4896 vlan_macip_lens |=
4897 (skb_transport_header(skb) - skb_network_header(skb));
4898 *hdr_len +=
4899 (skb_transport_header(skb) - skb_network_header(skb));
4900 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4901 context_desc->seqnum_seed = 0;
4902
4903 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
4904 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
4905 IXGBE_ADVTXD_DTYP_CTXT);
4906
4907 if (skb->protocol == htons(ETH_P_IP))
4908 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4909 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
4910 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4911
4912 /* MSS L4LEN IDX */
4913 mss_l4len_idx =
4914 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
4915 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
4916 /* use index 1 for TSO */
4917 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4918 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
4919
4920 tx_buffer_info->time_stamp = jiffies;
4921 tx_buffer_info->next_to_watch = i;
4922
4923 i++;
4924 if (i == tx_ring->count)
4925 i = 0;
4926 tx_ring->next_to_use = i;
4927
4928 return true;
4929 }
4930 return false;
4931 }
4932
4933 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
4934 struct ixgbe_ring *tx_ring,
4935 struct sk_buff *skb, u32 tx_flags)
4936 {
4937 struct ixgbe_adv_tx_context_desc *context_desc;
4938 unsigned int i;
4939 struct ixgbe_tx_buffer *tx_buffer_info;
4940 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
4941
4942 if (skb->ip_summed == CHECKSUM_PARTIAL ||
4943 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
4944 i = tx_ring->next_to_use;
4945 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4946 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4947
4948 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4949 vlan_macip_lens |=
4950 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4951 vlan_macip_lens |= (skb_network_offset(skb) <<
4952 IXGBE_ADVTXD_MACLEN_SHIFT);
4953 if (skb->ip_summed == CHECKSUM_PARTIAL)
4954 vlan_macip_lens |= (skb_transport_header(skb) -
4955 skb_network_header(skb));
4956
4957 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4958 context_desc->seqnum_seed = 0;
4959
4960 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
4961 IXGBE_ADVTXD_DTYP_CTXT);
4962
4963 if (skb->ip_summed == CHECKSUM_PARTIAL) {
4964 switch (skb->protocol) {
4965 case cpu_to_be16(ETH_P_IP):
4966 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4967 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
4968 type_tucmd_mlhl |=
4969 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4970 else if (ip_hdr(skb)->protocol == IPPROTO_SCTP)
4971 type_tucmd_mlhl |=
4972 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4973 break;
4974 case cpu_to_be16(ETH_P_IPV6):
4975 /* XXX what about other V6 headers?? */
4976 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
4977 type_tucmd_mlhl |=
4978 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4979 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_SCTP)
4980 type_tucmd_mlhl |=
4981 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4982 break;
4983 default:
4984 if (unlikely(net_ratelimit())) {
4985 DPRINTK(PROBE, WARNING,
4986 "partial checksum but proto=%x!\n",
4987 skb->protocol);
4988 }
4989 break;
4990 }
4991 }
4992
4993 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4994 /* use index zero for tx checksum offload */
4995 context_desc->mss_l4len_idx = 0;
4996
4997 tx_buffer_info->time_stamp = jiffies;
4998 tx_buffer_info->next_to_watch = i;
4999
5000 adapter->hw_csum_tx_good++;
5001 i++;
5002 if (i == tx_ring->count)
5003 i = 0;
5004 tx_ring->next_to_use = i;
5005
5006 return true;
5007 }
5008
5009 return false;
5010 }
5011
5012 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
5013 struct ixgbe_ring *tx_ring,
5014 struct sk_buff *skb, u32 tx_flags,
5015 unsigned int first)
5016 {
5017 struct ixgbe_tx_buffer *tx_buffer_info;
5018 unsigned int len;
5019 unsigned int total = skb->len;
5020 unsigned int offset = 0, size, count = 0, i;
5021 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
5022 unsigned int f;
5023 dma_addr_t *map;
5024
5025 i = tx_ring->next_to_use;
5026
5027 if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
5028 dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
5029 return 0;
5030 }
5031
5032 map = skb_shinfo(skb)->dma_maps;
5033
5034 if (tx_flags & IXGBE_TX_FLAGS_FCOE)
5035 /* excluding fcoe_crc_eof for FCoE */
5036 total -= sizeof(struct fcoe_crc_eof);
5037
5038 len = min(skb_headlen(skb), total);
5039 while (len) {
5040 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5041 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
5042
5043 tx_buffer_info->length = size;
5044 tx_buffer_info->dma = skb_shinfo(skb)->dma_head + offset;
5045 tx_buffer_info->time_stamp = jiffies;
5046 tx_buffer_info->next_to_watch = i;
5047
5048 len -= size;
5049 total -= size;
5050 offset += size;
5051 count++;
5052
5053 if (len) {
5054 i++;
5055 if (i == tx_ring->count)
5056 i = 0;
5057 }
5058 }
5059
5060 for (f = 0; f < nr_frags; f++) {
5061 struct skb_frag_struct *frag;
5062
5063 frag = &skb_shinfo(skb)->frags[f];
5064 len = min((unsigned int)frag->size, total);
5065 offset = 0;
5066
5067 while (len) {
5068 i++;
5069 if (i == tx_ring->count)
5070 i = 0;
5071
5072 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5073 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
5074
5075 tx_buffer_info->length = size;
5076 tx_buffer_info->dma = map[f] + offset;
5077 tx_buffer_info->time_stamp = jiffies;
5078 tx_buffer_info->next_to_watch = i;
5079
5080 len -= size;
5081 total -= size;
5082 offset += size;
5083 count++;
5084 }
5085 if (total == 0)
5086 break;
5087 }
5088
5089 tx_ring->tx_buffer_info[i].skb = skb;
5090 tx_ring->tx_buffer_info[first].next_to_watch = i;
5091
5092 return count;
5093 }
5094
5095 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
5096 struct ixgbe_ring *tx_ring,
5097 int tx_flags, int count, u32 paylen, u8 hdr_len)
5098 {
5099 union ixgbe_adv_tx_desc *tx_desc = NULL;
5100 struct ixgbe_tx_buffer *tx_buffer_info;
5101 u32 olinfo_status = 0, cmd_type_len = 0;
5102 unsigned int i;
5103 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
5104
5105 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
5106
5107 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
5108
5109 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5110 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
5111
5112 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
5113 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
5114
5115 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
5116 IXGBE_ADVTXD_POPTS_SHIFT;
5117
5118 /* use index 1 context for tso */
5119 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
5120 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
5121 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
5122 IXGBE_ADVTXD_POPTS_SHIFT;
5123
5124 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
5125 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
5126 IXGBE_ADVTXD_POPTS_SHIFT;
5127
5128 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
5129 olinfo_status |= IXGBE_ADVTXD_CC;
5130 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
5131 if (tx_flags & IXGBE_TX_FLAGS_FSO)
5132 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
5133 }
5134
5135 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
5136
5137 i = tx_ring->next_to_use;
5138 while (count--) {
5139 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5140 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
5141 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
5142 tx_desc->read.cmd_type_len =
5143 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
5144 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
5145 i++;
5146 if (i == tx_ring->count)
5147 i = 0;
5148 }
5149
5150 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
5151
5152 /*
5153 * Force memory writes to complete before letting h/w
5154 * know there are new descriptors to fetch. (Only
5155 * applicable for weak-ordered memory model archs,
5156 * such as IA-64).
5157 */
5158 wmb();
5159
5160 tx_ring->next_to_use = i;
5161 writel(i, adapter->hw.hw_addr + tx_ring->tail);
5162 }
5163
5164 static void ixgbe_atr(struct ixgbe_adapter *adapter, struct sk_buff *skb,
5165 int queue, u32 tx_flags)
5166 {
5167 /* Right now, we support IPv4 only */
5168 struct ixgbe_atr_input atr_input;
5169 struct tcphdr *th;
5170 struct iphdr *iph = ip_hdr(skb);
5171 struct ethhdr *eth = (struct ethhdr *)skb->data;
5172 u16 vlan_id, src_port, dst_port, flex_bytes;
5173 u32 src_ipv4_addr, dst_ipv4_addr;
5174 u8 l4type = 0;
5175
5176 /* check if we're UDP or TCP */
5177 if (iph->protocol == IPPROTO_TCP) {
5178 th = tcp_hdr(skb);
5179 src_port = th->source;
5180 dst_port = th->dest;
5181 l4type |= IXGBE_ATR_L4TYPE_TCP;
5182 /* l4type IPv4 type is 0, no need to assign */
5183 } else {
5184 /* Unsupported L4 header, just bail here */
5185 return;
5186 }
5187
5188 memset(&atr_input, 0, sizeof(struct ixgbe_atr_input));
5189
5190 vlan_id = (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK) >>
5191 IXGBE_TX_FLAGS_VLAN_SHIFT;
5192 src_ipv4_addr = iph->saddr;
5193 dst_ipv4_addr = iph->daddr;
5194 flex_bytes = eth->h_proto;
5195
5196 ixgbe_atr_set_vlan_id_82599(&atr_input, vlan_id);
5197 ixgbe_atr_set_src_port_82599(&atr_input, dst_port);
5198 ixgbe_atr_set_dst_port_82599(&atr_input, src_port);
5199 ixgbe_atr_set_flex_byte_82599(&atr_input, flex_bytes);
5200 ixgbe_atr_set_l4type_82599(&atr_input, l4type);
5201 /* src and dst are inverted, think how the receiver sees them */
5202 ixgbe_atr_set_src_ipv4_82599(&atr_input, dst_ipv4_addr);
5203 ixgbe_atr_set_dst_ipv4_82599(&atr_input, src_ipv4_addr);
5204
5205 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
5206 ixgbe_fdir_add_signature_filter_82599(&adapter->hw, &atr_input, queue);
5207 }
5208
5209 static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
5210 struct ixgbe_ring *tx_ring, int size)
5211 {
5212 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5213
5214 netif_stop_subqueue(netdev, tx_ring->queue_index);
5215 /* Herbert's original patch had:
5216 * smp_mb__after_netif_stop_queue();
5217 * but since that doesn't exist yet, just open code it. */
5218 smp_mb();
5219
5220 /* We need to check again in a case another CPU has just
5221 * made room available. */
5222 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
5223 return -EBUSY;
5224
5225 /* A reprieve! - use start_queue because it doesn't call schedule */
5226 netif_start_subqueue(netdev, tx_ring->queue_index);
5227 ++adapter->restart_queue;
5228 return 0;
5229 }
5230
5231 static int ixgbe_maybe_stop_tx(struct net_device *netdev,
5232 struct ixgbe_ring *tx_ring, int size)
5233 {
5234 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
5235 return 0;
5236 return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
5237 }
5238
5239 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
5240 {
5241 struct ixgbe_adapter *adapter = netdev_priv(dev);
5242
5243 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
5244 return smp_processor_id();
5245
5246 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
5247 return (skb->vlan_tci & IXGBE_TX_FLAGS_VLAN_PRIO_MASK) >> 13;
5248
5249 return skb_tx_hash(dev, skb);
5250 }
5251
5252 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
5253 struct net_device *netdev)
5254 {
5255 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5256 struct ixgbe_ring *tx_ring;
5257 unsigned int first;
5258 unsigned int tx_flags = 0;
5259 u8 hdr_len = 0;
5260 int r_idx = 0, tso;
5261 int count = 0;
5262 unsigned int f;
5263
5264 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
5265 tx_flags |= vlan_tx_tag_get(skb);
5266 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5267 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
5268 tx_flags |= (skb->queue_mapping << 13);
5269 }
5270 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
5271 tx_flags |= IXGBE_TX_FLAGS_VLAN;
5272 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5273 if (skb->priority != TC_PRIO_CONTROL) {
5274 tx_flags |= (skb->queue_mapping << 13);
5275 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
5276 tx_flags |= IXGBE_TX_FLAGS_VLAN;
5277 } else {
5278 skb->queue_mapping =
5279 adapter->ring_feature[RING_F_DCB].indices-1;
5280 }
5281 }
5282
5283 r_idx = skb->queue_mapping;
5284 tx_ring = &adapter->tx_ring[r_idx];
5285
5286 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
5287 (skb->protocol == htons(ETH_P_FCOE))) {
5288 tx_flags |= IXGBE_TX_FLAGS_FCOE;
5289 #ifdef IXGBE_FCOE
5290 r_idx = smp_processor_id();
5291 r_idx &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
5292 r_idx += adapter->ring_feature[RING_F_FCOE].mask;
5293 tx_ring = &adapter->tx_ring[r_idx];
5294 #endif
5295 }
5296 /* four things can cause us to need a context descriptor */
5297 if (skb_is_gso(skb) ||
5298 (skb->ip_summed == CHECKSUM_PARTIAL) ||
5299 (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
5300 (tx_flags & IXGBE_TX_FLAGS_FCOE))
5301 count++;
5302
5303 count += TXD_USE_COUNT(skb_headlen(skb));
5304 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
5305 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
5306
5307 if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
5308 adapter->tx_busy++;
5309 return NETDEV_TX_BUSY;
5310 }
5311
5312 first = tx_ring->next_to_use;
5313 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
5314 #ifdef IXGBE_FCOE
5315 /* setup tx offload for FCoE */
5316 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
5317 if (tso < 0) {
5318 dev_kfree_skb_any(skb);
5319 return NETDEV_TX_OK;
5320 }
5321 if (tso)
5322 tx_flags |= IXGBE_TX_FLAGS_FSO;
5323 #endif /* IXGBE_FCOE */
5324 } else {
5325 if (skb->protocol == htons(ETH_P_IP))
5326 tx_flags |= IXGBE_TX_FLAGS_IPV4;
5327 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
5328 if (tso < 0) {
5329 dev_kfree_skb_any(skb);
5330 return NETDEV_TX_OK;
5331 }
5332
5333 if (tso)
5334 tx_flags |= IXGBE_TX_FLAGS_TSO;
5335 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
5336 (skb->ip_summed == CHECKSUM_PARTIAL))
5337 tx_flags |= IXGBE_TX_FLAGS_CSUM;
5338 }
5339
5340 count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first);
5341 if (count) {
5342 /* add the ATR filter if ATR is on */
5343 if (tx_ring->atr_sample_rate) {
5344 ++tx_ring->atr_count;
5345 if ((tx_ring->atr_count >= tx_ring->atr_sample_rate) &&
5346 test_bit(__IXGBE_FDIR_INIT_DONE,
5347 &tx_ring->reinit_state)) {
5348 ixgbe_atr(adapter, skb, tx_ring->queue_index,
5349 tx_flags);
5350 tx_ring->atr_count = 0;
5351 }
5352 }
5353 ixgbe_tx_queue(adapter, tx_ring, tx_flags, count, skb->len,
5354 hdr_len);
5355 ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
5356
5357 } else {
5358 dev_kfree_skb_any(skb);
5359 tx_ring->tx_buffer_info[first].time_stamp = 0;
5360 tx_ring->next_to_use = first;
5361 }
5362
5363 return NETDEV_TX_OK;
5364 }
5365
5366 /**
5367 * ixgbe_get_stats - Get System Network Statistics
5368 * @netdev: network interface device structure
5369 *
5370 * Returns the address of the device statistics structure.
5371 * The statistics are actually updated from the timer callback.
5372 **/
5373 static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
5374 {
5375 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5376
5377 /* only return the current stats */
5378 return &adapter->net_stats;
5379 }
5380
5381 /**
5382 * ixgbe_set_mac - Change the Ethernet Address of the NIC
5383 * @netdev: network interface device structure
5384 * @p: pointer to an address structure
5385 *
5386 * Returns 0 on success, negative on failure
5387 **/
5388 static int ixgbe_set_mac(struct net_device *netdev, void *p)
5389 {
5390 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5391 struct ixgbe_hw *hw = &adapter->hw;
5392 struct sockaddr *addr = p;
5393
5394 if (!is_valid_ether_addr(addr->sa_data))
5395 return -EADDRNOTAVAIL;
5396
5397 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
5398 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
5399
5400 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
5401
5402 return 0;
5403 }
5404
5405 static int
5406 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
5407 {
5408 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5409 struct ixgbe_hw *hw = &adapter->hw;
5410 u16 value;
5411 int rc;
5412
5413 if (prtad != hw->phy.mdio.prtad)
5414 return -EINVAL;
5415 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
5416 if (!rc)
5417 rc = value;
5418 return rc;
5419 }
5420
5421 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
5422 u16 addr, u16 value)
5423 {
5424 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5425 struct ixgbe_hw *hw = &adapter->hw;
5426
5427 if (prtad != hw->phy.mdio.prtad)
5428 return -EINVAL;
5429 return hw->phy.ops.write_reg(hw, addr, devad, value);
5430 }
5431
5432 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
5433 {
5434 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5435
5436 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
5437 }
5438
5439 /**
5440 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
5441 * netdev->dev_addrs
5442 * @netdev: network interface device structure
5443 *
5444 * Returns non-zero on failure
5445 **/
5446 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
5447 {
5448 int err = 0;
5449 struct ixgbe_adapter *adapter = netdev_priv(dev);
5450 struct ixgbe_mac_info *mac = &adapter->hw.mac;
5451
5452 if (is_valid_ether_addr(mac->san_addr)) {
5453 rtnl_lock();
5454 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
5455 rtnl_unlock();
5456 }
5457 return err;
5458 }
5459
5460 /**
5461 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
5462 * netdev->dev_addrs
5463 * @netdev: network interface device structure
5464 *
5465 * Returns non-zero on failure
5466 **/
5467 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
5468 {
5469 int err = 0;
5470 struct ixgbe_adapter *adapter = netdev_priv(dev);
5471 struct ixgbe_mac_info *mac = &adapter->hw.mac;
5472
5473 if (is_valid_ether_addr(mac->san_addr)) {
5474 rtnl_lock();
5475 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
5476 rtnl_unlock();
5477 }
5478 return err;
5479 }
5480
5481 #ifdef CONFIG_NET_POLL_CONTROLLER
5482 /*
5483 * Polling 'interrupt' - used by things like netconsole to send skbs
5484 * without having to re-enable interrupts. It's not called while
5485 * the interrupt routine is executing.
5486 */
5487 static void ixgbe_netpoll(struct net_device *netdev)
5488 {
5489 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5490 int i;
5491
5492 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
5493 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
5494 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
5495 for (i = 0; i < num_q_vectors; i++) {
5496 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
5497 ixgbe_msix_clean_many(0, q_vector);
5498 }
5499 } else {
5500 ixgbe_intr(adapter->pdev->irq, netdev);
5501 }
5502 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
5503 }
5504 #endif
5505
5506 static const struct net_device_ops ixgbe_netdev_ops = {
5507 .ndo_open = ixgbe_open,
5508 .ndo_stop = ixgbe_close,
5509 .ndo_start_xmit = ixgbe_xmit_frame,
5510 .ndo_select_queue = ixgbe_select_queue,
5511 .ndo_get_stats = ixgbe_get_stats,
5512 .ndo_set_rx_mode = ixgbe_set_rx_mode,
5513 .ndo_set_multicast_list = ixgbe_set_rx_mode,
5514 .ndo_validate_addr = eth_validate_addr,
5515 .ndo_set_mac_address = ixgbe_set_mac,
5516 .ndo_change_mtu = ixgbe_change_mtu,
5517 .ndo_tx_timeout = ixgbe_tx_timeout,
5518 .ndo_vlan_rx_register = ixgbe_vlan_rx_register,
5519 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
5520 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
5521 .ndo_do_ioctl = ixgbe_ioctl,
5522 #ifdef CONFIG_NET_POLL_CONTROLLER
5523 .ndo_poll_controller = ixgbe_netpoll,
5524 #endif
5525 #ifdef IXGBE_FCOE
5526 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
5527 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
5528 .ndo_fcoe_enable = ixgbe_fcoe_enable,
5529 .ndo_fcoe_disable = ixgbe_fcoe_disable,
5530 #endif /* IXGBE_FCOE */
5531 };
5532
5533 /**
5534 * ixgbe_probe - Device Initialization Routine
5535 * @pdev: PCI device information struct
5536 * @ent: entry in ixgbe_pci_tbl
5537 *
5538 * Returns 0 on success, negative on failure
5539 *
5540 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
5541 * The OS initialization, configuring of the adapter private structure,
5542 * and a hardware reset occur.
5543 **/
5544 static int __devinit ixgbe_probe(struct pci_dev *pdev,
5545 const struct pci_device_id *ent)
5546 {
5547 struct net_device *netdev;
5548 struct ixgbe_adapter *adapter = NULL;
5549 struct ixgbe_hw *hw;
5550 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
5551 static int cards_found;
5552 int i, err, pci_using_dac;
5553 #ifdef IXGBE_FCOE
5554 u16 device_caps;
5555 #endif
5556 u32 part_num, eec;
5557
5558 err = pci_enable_device_mem(pdev);
5559 if (err)
5560 return err;
5561
5562 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) &&
5563 !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
5564 pci_using_dac = 1;
5565 } else {
5566 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5567 if (err) {
5568 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5569 if (err) {
5570 dev_err(&pdev->dev, "No usable DMA "
5571 "configuration, aborting\n");
5572 goto err_dma;
5573 }
5574 }
5575 pci_using_dac = 0;
5576 }
5577
5578 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
5579 IORESOURCE_MEM), ixgbe_driver_name);
5580 if (err) {
5581 dev_err(&pdev->dev,
5582 "pci_request_selected_regions failed 0x%x\n", err);
5583 goto err_pci_reg;
5584 }
5585
5586 pci_enable_pcie_error_reporting(pdev);
5587
5588 pci_set_master(pdev);
5589 pci_save_state(pdev);
5590
5591 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES);
5592 if (!netdev) {
5593 err = -ENOMEM;
5594 goto err_alloc_etherdev;
5595 }
5596
5597 SET_NETDEV_DEV(netdev, &pdev->dev);
5598
5599 pci_set_drvdata(pdev, netdev);
5600 adapter = netdev_priv(netdev);
5601
5602 adapter->netdev = netdev;
5603 adapter->pdev = pdev;
5604 hw = &adapter->hw;
5605 hw->back = adapter;
5606 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
5607
5608 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
5609 pci_resource_len(pdev, 0));
5610 if (!hw->hw_addr) {
5611 err = -EIO;
5612 goto err_ioremap;
5613 }
5614
5615 for (i = 1; i <= 5; i++) {
5616 if (pci_resource_len(pdev, i) == 0)
5617 continue;
5618 }
5619
5620 netdev->netdev_ops = &ixgbe_netdev_ops;
5621 ixgbe_set_ethtool_ops(netdev);
5622 netdev->watchdog_timeo = 5 * HZ;
5623 strcpy(netdev->name, pci_name(pdev));
5624
5625 adapter->bd_number = cards_found;
5626
5627 /* Setup hw api */
5628 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
5629 hw->mac.type = ii->mac;
5630
5631 /* EEPROM */
5632 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
5633 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
5634 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
5635 if (!(eec & (1 << 8)))
5636 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
5637
5638 /* PHY */
5639 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
5640 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
5641 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
5642 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
5643 hw->phy.mdio.mmds = 0;
5644 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
5645 hw->phy.mdio.dev = netdev;
5646 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
5647 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
5648
5649 /* set up this timer and work struct before calling get_invariants
5650 * which might start the timer
5651 */
5652 init_timer(&adapter->sfp_timer);
5653 adapter->sfp_timer.function = &ixgbe_sfp_timer;
5654 adapter->sfp_timer.data = (unsigned long) adapter;
5655
5656 INIT_WORK(&adapter->sfp_task, ixgbe_sfp_task);
5657
5658 /* multispeed fiber has its own tasklet, called from GPI SDP1 context */
5659 INIT_WORK(&adapter->multispeed_fiber_task, ixgbe_multispeed_fiber_task);
5660
5661 /* a new SFP+ module arrival, called from GPI SDP2 context */
5662 INIT_WORK(&adapter->sfp_config_module_task,
5663 ixgbe_sfp_config_module_task);
5664
5665 ii->get_invariants(hw);
5666
5667 /* setup the private structure */
5668 err = ixgbe_sw_init(adapter);
5669 if (err)
5670 goto err_sw_init;
5671
5672 /*
5673 * If there is a fan on this device and it has failed log the
5674 * failure.
5675 */
5676 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
5677 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
5678 if (esdp & IXGBE_ESDP_SDP1)
5679 DPRINTK(PROBE, CRIT,
5680 "Fan has stopped, replace the adapter\n");
5681 }
5682
5683 /* reset_hw fills in the perm_addr as well */
5684 err = hw->mac.ops.reset_hw(hw);
5685 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
5686 hw->mac.type == ixgbe_mac_82598EB) {
5687 /*
5688 * Start a kernel thread to watch for a module to arrive.
5689 * Only do this for 82598, since 82599 will generate
5690 * interrupts on module arrival.
5691 */
5692 set_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5693 mod_timer(&adapter->sfp_timer,
5694 round_jiffies(jiffies + (2 * HZ)));
5695 err = 0;
5696 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5697 dev_err(&adapter->pdev->dev, "failed to initialize because "
5698 "an unsupported SFP+ module type was detected.\n"
5699 "Reload the driver after installing a supported "
5700 "module.\n");
5701 goto err_sw_init;
5702 } else if (err) {
5703 dev_err(&adapter->pdev->dev, "HW Init failed: %d\n", err);
5704 goto err_sw_init;
5705 }
5706
5707 netdev->features = NETIF_F_SG |
5708 NETIF_F_IP_CSUM |
5709 NETIF_F_HW_VLAN_TX |
5710 NETIF_F_HW_VLAN_RX |
5711 NETIF_F_HW_VLAN_FILTER;
5712
5713 netdev->features |= NETIF_F_IPV6_CSUM;
5714 netdev->features |= NETIF_F_TSO;
5715 netdev->features |= NETIF_F_TSO6;
5716 netdev->features |= NETIF_F_GRO;
5717
5718 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
5719 netdev->features |= NETIF_F_SCTP_CSUM;
5720
5721 netdev->vlan_features |= NETIF_F_TSO;
5722 netdev->vlan_features |= NETIF_F_TSO6;
5723 netdev->vlan_features |= NETIF_F_IP_CSUM;
5724 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
5725 netdev->vlan_features |= NETIF_F_SG;
5726
5727 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
5728 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
5729
5730 #ifdef CONFIG_IXGBE_DCB
5731 netdev->dcbnl_ops = &dcbnl_ops;
5732 #endif
5733
5734 #ifdef IXGBE_FCOE
5735 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
5736 if (hw->mac.ops.get_device_caps) {
5737 hw->mac.ops.get_device_caps(hw, &device_caps);
5738 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
5739 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
5740 }
5741 }
5742 #endif /* IXGBE_FCOE */
5743 if (pci_using_dac)
5744 netdev->features |= NETIF_F_HIGHDMA;
5745
5746 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
5747 netdev->features |= NETIF_F_LRO;
5748
5749 /* make sure the EEPROM is good */
5750 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
5751 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
5752 err = -EIO;
5753 goto err_eeprom;
5754 }
5755
5756 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
5757 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
5758
5759 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
5760 dev_err(&pdev->dev, "invalid MAC address\n");
5761 err = -EIO;
5762 goto err_eeprom;
5763 }
5764
5765 init_timer(&adapter->watchdog_timer);
5766 adapter->watchdog_timer.function = &ixgbe_watchdog;
5767 adapter->watchdog_timer.data = (unsigned long)adapter;
5768
5769 INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
5770 INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
5771
5772 err = ixgbe_init_interrupt_scheme(adapter);
5773 if (err)
5774 goto err_sw_init;
5775
5776 switch (pdev->device) {
5777 case IXGBE_DEV_ID_82599_KX4:
5778 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
5779 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
5780 /* Enable ACPI wakeup in GRC */
5781 IXGBE_WRITE_REG(hw, IXGBE_GRC,
5782 (IXGBE_READ_REG(hw, IXGBE_GRC) & ~IXGBE_GRC_APME));
5783 break;
5784 default:
5785 adapter->wol = 0;
5786 break;
5787 }
5788 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
5789
5790 /* pick up the PCI bus settings for reporting later */
5791 hw->mac.ops.get_bus_info(hw);
5792
5793 /* print bus type/speed/width info */
5794 dev_info(&pdev->dev, "(PCI Express:%s:%s) %pM\n",
5795 ((hw->bus.speed == ixgbe_bus_speed_5000) ? "5.0Gb/s":
5796 (hw->bus.speed == ixgbe_bus_speed_2500) ? "2.5Gb/s":"Unknown"),
5797 ((hw->bus.width == ixgbe_bus_width_pcie_x8) ? "Width x8" :
5798 (hw->bus.width == ixgbe_bus_width_pcie_x4) ? "Width x4" :
5799 (hw->bus.width == ixgbe_bus_width_pcie_x1) ? "Width x1" :
5800 "Unknown"),
5801 netdev->dev_addr);
5802 ixgbe_read_pba_num_generic(hw, &part_num);
5803 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
5804 dev_info(&pdev->dev, "MAC: %d, PHY: %d, SFP+: %d, PBA No: %06x-%03x\n",
5805 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
5806 (part_num >> 8), (part_num & 0xff));
5807 else
5808 dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
5809 hw->mac.type, hw->phy.type,
5810 (part_num >> 8), (part_num & 0xff));
5811
5812 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
5813 dev_warn(&pdev->dev, "PCI-Express bandwidth available for "
5814 "this card is not sufficient for optimal "
5815 "performance.\n");
5816 dev_warn(&pdev->dev, "For optimal performance a x8 "
5817 "PCI-Express slot is required.\n");
5818 }
5819
5820 /* save off EEPROM version number */
5821 hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
5822
5823 /* reset the hardware with the new settings */
5824 err = hw->mac.ops.start_hw(hw);
5825
5826 if (err == IXGBE_ERR_EEPROM_VERSION) {
5827 /* We are running on a pre-production device, log a warning */
5828 dev_warn(&pdev->dev, "This device is a pre-production "
5829 "adapter/LOM. Please be aware there may be issues "
5830 "associated with your hardware. If you are "
5831 "experiencing problems please contact your Intel or "
5832 "hardware representative who provided you with this "
5833 "hardware.\n");
5834 }
5835 strcpy(netdev->name, "eth%d");
5836 err = register_netdev(netdev);
5837 if (err)
5838 goto err_register;
5839
5840 /* carrier off reporting is important to ethtool even BEFORE open */
5841 netif_carrier_off(netdev);
5842
5843 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
5844 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
5845 INIT_WORK(&adapter->fdir_reinit_task, ixgbe_fdir_reinit_task);
5846
5847 #ifdef CONFIG_IXGBE_DCA
5848 if (dca_add_requester(&pdev->dev) == 0) {
5849 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
5850 ixgbe_setup_dca(adapter);
5851 }
5852 #endif
5853 /* add san mac addr to netdev */
5854 ixgbe_add_sanmac_netdev(netdev);
5855
5856 dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
5857 cards_found++;
5858 return 0;
5859
5860 err_register:
5861 ixgbe_release_hw_control(adapter);
5862 ixgbe_clear_interrupt_scheme(adapter);
5863 err_sw_init:
5864 err_eeprom:
5865 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5866 del_timer_sync(&adapter->sfp_timer);
5867 cancel_work_sync(&adapter->sfp_task);
5868 cancel_work_sync(&adapter->multispeed_fiber_task);
5869 cancel_work_sync(&adapter->sfp_config_module_task);
5870 iounmap(hw->hw_addr);
5871 err_ioremap:
5872 free_netdev(netdev);
5873 err_alloc_etherdev:
5874 pci_release_selected_regions(pdev, pci_select_bars(pdev,
5875 IORESOURCE_MEM));
5876 err_pci_reg:
5877 err_dma:
5878 pci_disable_device(pdev);
5879 return err;
5880 }
5881
5882 /**
5883 * ixgbe_remove - Device Removal Routine
5884 * @pdev: PCI device information struct
5885 *
5886 * ixgbe_remove is called by the PCI subsystem to alert the driver
5887 * that it should release a PCI device. The could be caused by a
5888 * Hot-Plug event, or because the driver is going to be removed from
5889 * memory.
5890 **/
5891 static void __devexit ixgbe_remove(struct pci_dev *pdev)
5892 {
5893 struct net_device *netdev = pci_get_drvdata(pdev);
5894 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5895
5896 set_bit(__IXGBE_DOWN, &adapter->state);
5897 /* clear the module not found bit to make sure the worker won't
5898 * reschedule
5899 */
5900 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5901 del_timer_sync(&adapter->watchdog_timer);
5902
5903 del_timer_sync(&adapter->sfp_timer);
5904 cancel_work_sync(&adapter->watchdog_task);
5905 cancel_work_sync(&adapter->sfp_task);
5906 cancel_work_sync(&adapter->multispeed_fiber_task);
5907 cancel_work_sync(&adapter->sfp_config_module_task);
5908 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
5909 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
5910 cancel_work_sync(&adapter->fdir_reinit_task);
5911 flush_scheduled_work();
5912
5913 #ifdef CONFIG_IXGBE_DCA
5914 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
5915 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
5916 dca_remove_requester(&pdev->dev);
5917 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
5918 }
5919
5920 #endif
5921 #ifdef IXGBE_FCOE
5922 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
5923 ixgbe_cleanup_fcoe(adapter);
5924
5925 #endif /* IXGBE_FCOE */
5926
5927 /* remove the added san mac */
5928 ixgbe_del_sanmac_netdev(netdev);
5929
5930 if (netdev->reg_state == NETREG_REGISTERED)
5931 unregister_netdev(netdev);
5932
5933 ixgbe_clear_interrupt_scheme(adapter);
5934
5935 ixgbe_release_hw_control(adapter);
5936
5937 iounmap(adapter->hw.hw_addr);
5938 pci_release_selected_regions(pdev, pci_select_bars(pdev,
5939 IORESOURCE_MEM));
5940
5941 DPRINTK(PROBE, INFO, "complete\n");
5942
5943 free_netdev(netdev);
5944
5945 pci_disable_pcie_error_reporting(pdev);
5946
5947 pci_disable_device(pdev);
5948 }
5949
5950 /**
5951 * ixgbe_io_error_detected - called when PCI error is detected
5952 * @pdev: Pointer to PCI device
5953 * @state: The current pci connection state
5954 *
5955 * This function is called after a PCI bus error affecting
5956 * this device has been detected.
5957 */
5958 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
5959 pci_channel_state_t state)
5960 {
5961 struct net_device *netdev = pci_get_drvdata(pdev);
5962 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5963
5964 netif_device_detach(netdev);
5965
5966 if (state == pci_channel_io_perm_failure)
5967 return PCI_ERS_RESULT_DISCONNECT;
5968
5969 if (netif_running(netdev))
5970 ixgbe_down(adapter);
5971 pci_disable_device(pdev);
5972
5973 /* Request a slot reset. */
5974 return PCI_ERS_RESULT_NEED_RESET;
5975 }
5976
5977 /**
5978 * ixgbe_io_slot_reset - called after the pci bus has been reset.
5979 * @pdev: Pointer to PCI device
5980 *
5981 * Restart the card from scratch, as if from a cold-boot.
5982 */
5983 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
5984 {
5985 struct net_device *netdev = pci_get_drvdata(pdev);
5986 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5987 pci_ers_result_t result;
5988 int err;
5989
5990 if (pci_enable_device_mem(pdev)) {
5991 DPRINTK(PROBE, ERR,
5992 "Cannot re-enable PCI device after reset.\n");
5993 result = PCI_ERS_RESULT_DISCONNECT;
5994 } else {
5995 pci_set_master(pdev);
5996 pci_restore_state(pdev);
5997 pci_save_state(pdev);
5998
5999 pci_wake_from_d3(pdev, false);
6000
6001 ixgbe_reset(adapter);
6002 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
6003 result = PCI_ERS_RESULT_RECOVERED;
6004 }
6005
6006 err = pci_cleanup_aer_uncorrect_error_status(pdev);
6007 if (err) {
6008 dev_err(&pdev->dev,
6009 "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n", err);
6010 /* non-fatal, continue */
6011 }
6012
6013 return result;
6014 }
6015
6016 /**
6017 * ixgbe_io_resume - called when traffic can start flowing again.
6018 * @pdev: Pointer to PCI device
6019 *
6020 * This callback is called when the error recovery driver tells us that
6021 * its OK to resume normal operation.
6022 */
6023 static void ixgbe_io_resume(struct pci_dev *pdev)
6024 {
6025 struct net_device *netdev = pci_get_drvdata(pdev);
6026 struct ixgbe_adapter *adapter = netdev_priv(netdev);
6027
6028 if (netif_running(netdev)) {
6029 if (ixgbe_up(adapter)) {
6030 DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
6031 return;
6032 }
6033 }
6034
6035 netif_device_attach(netdev);
6036 }
6037
6038 static struct pci_error_handlers ixgbe_err_handler = {
6039 .error_detected = ixgbe_io_error_detected,
6040 .slot_reset = ixgbe_io_slot_reset,
6041 .resume = ixgbe_io_resume,
6042 };
6043
6044 static struct pci_driver ixgbe_driver = {
6045 .name = ixgbe_driver_name,
6046 .id_table = ixgbe_pci_tbl,
6047 .probe = ixgbe_probe,
6048 .remove = __devexit_p(ixgbe_remove),
6049 #ifdef CONFIG_PM
6050 .suspend = ixgbe_suspend,
6051 .resume = ixgbe_resume,
6052 #endif
6053 .shutdown = ixgbe_shutdown,
6054 .err_handler = &ixgbe_err_handler
6055 };
6056
6057 /**
6058 * ixgbe_init_module - Driver Registration Routine
6059 *
6060 * ixgbe_init_module is the first routine called when the driver is
6061 * loaded. All it does is register with the PCI subsystem.
6062 **/
6063 static int __init ixgbe_init_module(void)
6064 {
6065 int ret;
6066 printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
6067 ixgbe_driver_string, ixgbe_driver_version);
6068
6069 printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
6070
6071 #ifdef CONFIG_IXGBE_DCA
6072 dca_register_notify(&dca_notifier);
6073 #endif
6074
6075 ret = pci_register_driver(&ixgbe_driver);
6076 return ret;
6077 }
6078
6079 module_init(ixgbe_init_module);
6080
6081 /**
6082 * ixgbe_exit_module - Driver Exit Cleanup Routine
6083 *
6084 * ixgbe_exit_module is called just before the driver is removed
6085 * from memory.
6086 **/
6087 static void __exit ixgbe_exit_module(void)
6088 {
6089 #ifdef CONFIG_IXGBE_DCA
6090 dca_unregister_notify(&dca_notifier);
6091 #endif
6092 pci_unregister_driver(&ixgbe_driver);
6093 }
6094
6095 #ifdef CONFIG_IXGBE_DCA
6096 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
6097 void *p)
6098 {
6099 int ret_val;
6100
6101 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
6102 __ixgbe_notify_dca);
6103
6104 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
6105 }
6106
6107 #endif /* CONFIG_IXGBE_DCA */
6108 #ifdef DEBUG
6109 /**
6110 * ixgbe_get_hw_dev_name - return device name string
6111 * used by hardware layer to print debugging information
6112 **/
6113 char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw)
6114 {
6115 struct ixgbe_adapter *adapter = hw->back;
6116 return adapter->netdev->name;
6117 }
6118
6119 #endif
6120 module_exit(ixgbe_exit_module);
6121
6122 /* ixgbe_main.c */
Support for the Chinese Samsung S3C2440 based development boards