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Merge branch 'nomadik' into devel-stable
[deliverable/linux.git] / drivers / net / ixgbe / ixgbe_main.c
1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2009 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26 *******************************************************************************/
27
28 #include <linux/types.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/netdevice.h>
32 #include <linux/vmalloc.h>
33 #include <linux/string.h>
34 #include <linux/in.h>
35 #include <linux/ip.h>
36 #include <linux/tcp.h>
37 #include <linux/pkt_sched.h>
38 #include <linux/ipv6.h>
39 #include <net/checksum.h>
40 #include <net/ip6_checksum.h>
41 #include <linux/ethtool.h>
42 #include <linux/if_vlan.h>
43 #include <scsi/fc/fc_fcoe.h>
44
45 #include "ixgbe.h"
46 #include "ixgbe_common.h"
47
48 char ixgbe_driver_name[] = "ixgbe";
49 static const char ixgbe_driver_string[] =
50 "Intel(R) 10 Gigabit PCI Express Network Driver";
51
52 #define DRV_VERSION "2.0.34-k2"
53 const char ixgbe_driver_version[] = DRV_VERSION;
54 static char ixgbe_copyright[] = "Copyright (c) 1999-2009 Intel Corporation.";
55
56 static const struct ixgbe_info *ixgbe_info_tbl[] = {
57 [board_82598] = &ixgbe_82598_info,
58 [board_82599] = &ixgbe_82599_info,
59 };
60
61 /* ixgbe_pci_tbl - PCI Device ID Table
62 *
63 * Wildcard entries (PCI_ANY_ID) should come last
64 * Last entry must be all 0s
65 *
66 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
67 * Class, Class Mask, private data (not used) }
68 */
69 static struct pci_device_id ixgbe_pci_tbl[] = {
70 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598),
71 board_82598 },
72 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
73 board_82598 },
74 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
75 board_82598 },
76 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT),
77 board_82598 },
78 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
79 board_82598 },
80 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT),
81 board_82598 },
82 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT),
83 board_82598 },
84 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM),
85 board_82598 },
86 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR),
87 board_82598 },
88 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM),
89 board_82598 },
90 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX),
91 board_82598 },
92 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4),
93 board_82599 },
94 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM),
95 board_82599 },
96 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP),
97 board_82599 },
98
99 /* required last entry */
100 {0, }
101 };
102 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
103
104 #ifdef CONFIG_IXGBE_DCA
105 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
106 void *p);
107 static struct notifier_block dca_notifier = {
108 .notifier_call = ixgbe_notify_dca,
109 .next = NULL,
110 .priority = 0
111 };
112 #endif
113
114 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
115 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
116 MODULE_LICENSE("GPL");
117 MODULE_VERSION(DRV_VERSION);
118
119 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
120
121 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
122 {
123 u32 ctrl_ext;
124
125 /* Let firmware take over control of h/w */
126 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
127 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
128 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
129 }
130
131 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
132 {
133 u32 ctrl_ext;
134
135 /* Let firmware know the driver has taken over */
136 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
137 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
138 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
139 }
140
141 /*
142 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
143 * @adapter: pointer to adapter struct
144 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
145 * @queue: queue to map the corresponding interrupt to
146 * @msix_vector: the vector to map to the corresponding queue
147 *
148 */
149 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
150 u8 queue, u8 msix_vector)
151 {
152 u32 ivar, index;
153 struct ixgbe_hw *hw = &adapter->hw;
154 switch (hw->mac.type) {
155 case ixgbe_mac_82598EB:
156 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
157 if (direction == -1)
158 direction = 0;
159 index = (((direction * 64) + queue) >> 2) & 0x1F;
160 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
161 ivar &= ~(0xFF << (8 * (queue & 0x3)));
162 ivar |= (msix_vector << (8 * (queue & 0x3)));
163 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
164 break;
165 case ixgbe_mac_82599EB:
166 if (direction == -1) {
167 /* other causes */
168 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
169 index = ((queue & 1) * 8);
170 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
171 ivar &= ~(0xFF << index);
172 ivar |= (msix_vector << index);
173 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
174 break;
175 } else {
176 /* tx or rx causes */
177 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
178 index = ((16 * (queue & 1)) + (8 * direction));
179 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
180 ivar &= ~(0xFF << index);
181 ivar |= (msix_vector << index);
182 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
183 break;
184 }
185 default:
186 break;
187 }
188 }
189
190 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
191 u64 qmask)
192 {
193 u32 mask;
194
195 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
196 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
197 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
198 } else {
199 mask = (qmask & 0xFFFFFFFF);
200 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
201 mask = (qmask >> 32);
202 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
203 }
204 }
205
206 static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
207 struct ixgbe_tx_buffer
208 *tx_buffer_info)
209 {
210 tx_buffer_info->dma = 0;
211 if (tx_buffer_info->skb) {
212 skb_dma_unmap(&adapter->pdev->dev, tx_buffer_info->skb,
213 DMA_TO_DEVICE);
214 dev_kfree_skb_any(tx_buffer_info->skb);
215 tx_buffer_info->skb = NULL;
216 }
217 tx_buffer_info->time_stamp = 0;
218 /* tx_buffer_info must be completely set up in the transmit path */
219 }
220
221 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
222 struct ixgbe_ring *tx_ring,
223 unsigned int eop)
224 {
225 struct ixgbe_hw *hw = &adapter->hw;
226
227 /* Detect a transmit hang in hardware, this serializes the
228 * check with the clearing of time_stamp and movement of eop */
229 adapter->detect_tx_hung = false;
230 if (tx_ring->tx_buffer_info[eop].time_stamp &&
231 time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
232 !(IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & IXGBE_TFCS_TXOFF)) {
233 /* detected Tx unit hang */
234 union ixgbe_adv_tx_desc *tx_desc;
235 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
236 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
237 " Tx Queue <%d>\n"
238 " TDH, TDT <%x>, <%x>\n"
239 " next_to_use <%x>\n"
240 " next_to_clean <%x>\n"
241 "tx_buffer_info[next_to_clean]\n"
242 " time_stamp <%lx>\n"
243 " jiffies <%lx>\n",
244 tx_ring->queue_index,
245 IXGBE_READ_REG(hw, tx_ring->head),
246 IXGBE_READ_REG(hw, tx_ring->tail),
247 tx_ring->next_to_use, eop,
248 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
249 return true;
250 }
251
252 return false;
253 }
254
255 #define IXGBE_MAX_TXD_PWR 14
256 #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
257
258 /* Tx Descriptors needed, worst case */
259 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
260 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
261 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
262 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
263
264 static void ixgbe_tx_timeout(struct net_device *netdev);
265
266 /**
267 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
268 * @q_vector: structure containing interrupt and ring information
269 * @tx_ring: tx ring to clean
270 **/
271 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
272 struct ixgbe_ring *tx_ring)
273 {
274 struct ixgbe_adapter *adapter = q_vector->adapter;
275 struct net_device *netdev = adapter->netdev;
276 union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
277 struct ixgbe_tx_buffer *tx_buffer_info;
278 unsigned int i, eop, count = 0;
279 unsigned int total_bytes = 0, total_packets = 0;
280
281 i = tx_ring->next_to_clean;
282 eop = tx_ring->tx_buffer_info[i].next_to_watch;
283 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
284
285 while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
286 (count < tx_ring->work_limit)) {
287 bool cleaned = false;
288 for ( ; !cleaned; count++) {
289 struct sk_buff *skb;
290 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
291 tx_buffer_info = &tx_ring->tx_buffer_info[i];
292 cleaned = (i == eop);
293 skb = tx_buffer_info->skb;
294
295 if (cleaned && skb) {
296 unsigned int segs, bytecount;
297 unsigned int hlen = skb_headlen(skb);
298
299 /* gso_segs is currently only valid for tcp */
300 segs = skb_shinfo(skb)->gso_segs ?: 1;
301 #ifdef IXGBE_FCOE
302 /* adjust for FCoE Sequence Offload */
303 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
304 && (skb->protocol == htons(ETH_P_FCOE)) &&
305 skb_is_gso(skb)) {
306 hlen = skb_transport_offset(skb) +
307 sizeof(struct fc_frame_header) +
308 sizeof(struct fcoe_crc_eof);
309 segs = DIV_ROUND_UP(skb->len - hlen,
310 skb_shinfo(skb)->gso_size);
311 }
312 #endif /* IXGBE_FCOE */
313 /* multiply data chunks by size of headers */
314 bytecount = ((segs - 1) * hlen) + skb->len;
315 total_packets += segs;
316 total_bytes += bytecount;
317 }
318
319 ixgbe_unmap_and_free_tx_resource(adapter,
320 tx_buffer_info);
321
322 tx_desc->wb.status = 0;
323
324 i++;
325 if (i == tx_ring->count)
326 i = 0;
327 }
328
329 eop = tx_ring->tx_buffer_info[i].next_to_watch;
330 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
331 }
332
333 tx_ring->next_to_clean = i;
334
335 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
336 if (unlikely(count && netif_carrier_ok(netdev) &&
337 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
338 /* Make sure that anybody stopping the queue after this
339 * sees the new next_to_clean.
340 */
341 smp_mb();
342 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
343 !test_bit(__IXGBE_DOWN, &adapter->state)) {
344 netif_wake_subqueue(netdev, tx_ring->queue_index);
345 ++adapter->restart_queue;
346 }
347 }
348
349 if (adapter->detect_tx_hung) {
350 if (ixgbe_check_tx_hang(adapter, tx_ring, i)) {
351 /* schedule immediate reset if we believe we hung */
352 DPRINTK(PROBE, INFO,
353 "tx hang %d detected, resetting adapter\n",
354 adapter->tx_timeout_count + 1);
355 ixgbe_tx_timeout(adapter->netdev);
356 }
357 }
358
359 /* re-arm the interrupt */
360 if (count >= tx_ring->work_limit)
361 ixgbe_irq_rearm_queues(adapter, ((u64)1 << q_vector->v_idx));
362
363 tx_ring->total_bytes += total_bytes;
364 tx_ring->total_packets += total_packets;
365 tx_ring->stats.packets += total_packets;
366 tx_ring->stats.bytes += total_bytes;
367 adapter->net_stats.tx_bytes += total_bytes;
368 adapter->net_stats.tx_packets += total_packets;
369 return (count < tx_ring->work_limit);
370 }
371
372 #ifdef CONFIG_IXGBE_DCA
373 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
374 struct ixgbe_ring *rx_ring)
375 {
376 u32 rxctrl;
377 int cpu = get_cpu();
378 int q = rx_ring - adapter->rx_ring;
379
380 if (rx_ring->cpu != cpu) {
381 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
382 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
383 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
384 rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
385 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
386 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
387 rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
388 IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
389 }
390 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
391 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
392 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
393 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_WRO_EN |
394 IXGBE_DCA_RXCTRL_DESC_HSRO_EN);
395 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
396 rx_ring->cpu = cpu;
397 }
398 put_cpu();
399 }
400
401 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
402 struct ixgbe_ring *tx_ring)
403 {
404 u32 txctrl;
405 int cpu = get_cpu();
406 int q = tx_ring - adapter->tx_ring;
407
408 if (tx_ring->cpu != cpu) {
409 txctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q));
410 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
411 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
412 txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
413 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
414 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
415 txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
416 IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
417 }
418 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
419 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q), txctrl);
420 tx_ring->cpu = cpu;
421 }
422 put_cpu();
423 }
424
425 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
426 {
427 int i;
428
429 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
430 return;
431
432 /* always use CB2 mode, difference is masked in the CB driver */
433 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
434
435 for (i = 0; i < adapter->num_tx_queues; i++) {
436 adapter->tx_ring[i].cpu = -1;
437 ixgbe_update_tx_dca(adapter, &adapter->tx_ring[i]);
438 }
439 for (i = 0; i < adapter->num_rx_queues; i++) {
440 adapter->rx_ring[i].cpu = -1;
441 ixgbe_update_rx_dca(adapter, &adapter->rx_ring[i]);
442 }
443 }
444
445 static int __ixgbe_notify_dca(struct device *dev, void *data)
446 {
447 struct net_device *netdev = dev_get_drvdata(dev);
448 struct ixgbe_adapter *adapter = netdev_priv(netdev);
449 unsigned long event = *(unsigned long *)data;
450
451 switch (event) {
452 case DCA_PROVIDER_ADD:
453 /* if we're already enabled, don't do it again */
454 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
455 break;
456 if (dca_add_requester(dev) == 0) {
457 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
458 ixgbe_setup_dca(adapter);
459 break;
460 }
461 /* Fall Through since DCA is disabled. */
462 case DCA_PROVIDER_REMOVE:
463 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
464 dca_remove_requester(dev);
465 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
466 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
467 }
468 break;
469 }
470
471 return 0;
472 }
473
474 #endif /* CONFIG_IXGBE_DCA */
475 /**
476 * ixgbe_receive_skb - Send a completed packet up the stack
477 * @adapter: board private structure
478 * @skb: packet to send up
479 * @status: hardware indication of status of receive
480 * @rx_ring: rx descriptor ring (for a specific queue) to setup
481 * @rx_desc: rx descriptor
482 **/
483 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
484 struct sk_buff *skb, u8 status,
485 struct ixgbe_ring *ring,
486 union ixgbe_adv_rx_desc *rx_desc)
487 {
488 struct ixgbe_adapter *adapter = q_vector->adapter;
489 struct napi_struct *napi = &q_vector->napi;
490 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
491 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
492
493 skb_record_rx_queue(skb, ring->queue_index);
494 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
495 if (adapter->vlgrp && is_vlan && (tag != 0))
496 vlan_gro_receive(napi, adapter->vlgrp, tag, skb);
497 else
498 napi_gro_receive(napi, skb);
499 } else {
500 if (adapter->vlgrp && is_vlan && (tag != 0))
501 vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
502 else
503 netif_rx(skb);
504 }
505 }
506
507 /**
508 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
509 * @adapter: address of board private structure
510 * @status_err: hardware indication of status of receive
511 * @skb: skb currently being received and modified
512 **/
513 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
514 union ixgbe_adv_rx_desc *rx_desc,
515 struct sk_buff *skb)
516 {
517 u32 status_err = le32_to_cpu(rx_desc->wb.upper.status_error);
518
519 skb->ip_summed = CHECKSUM_NONE;
520
521 /* Rx csum disabled */
522 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
523 return;
524
525 /* if IP and error */
526 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
527 (status_err & IXGBE_RXDADV_ERR_IPE)) {
528 adapter->hw_csum_rx_error++;
529 return;
530 }
531
532 if (!(status_err & IXGBE_RXD_STAT_L4CS))
533 return;
534
535 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
536 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
537
538 /*
539 * 82599 errata, UDP frames with a 0 checksum can be marked as
540 * checksum errors.
541 */
542 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
543 (adapter->hw.mac.type == ixgbe_mac_82599EB))
544 return;
545
546 adapter->hw_csum_rx_error++;
547 return;
548 }
549
550 /* It must be a TCP or UDP packet with a valid checksum */
551 skb->ip_summed = CHECKSUM_UNNECESSARY;
552 adapter->hw_csum_rx_good++;
553 }
554
555 static inline void ixgbe_release_rx_desc(struct ixgbe_hw *hw,
556 struct ixgbe_ring *rx_ring, u32 val)
557 {
558 /*
559 * Force memory writes to complete before letting h/w
560 * know there are new descriptors to fetch. (Only
561 * applicable for weak-ordered memory model archs,
562 * such as IA-64).
563 */
564 wmb();
565 IXGBE_WRITE_REG(hw, IXGBE_RDT(rx_ring->reg_idx), val);
566 }
567
568 /**
569 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
570 * @adapter: address of board private structure
571 **/
572 static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
573 struct ixgbe_ring *rx_ring,
574 int cleaned_count)
575 {
576 struct pci_dev *pdev = adapter->pdev;
577 union ixgbe_adv_rx_desc *rx_desc;
578 struct ixgbe_rx_buffer *bi;
579 unsigned int i;
580
581 i = rx_ring->next_to_use;
582 bi = &rx_ring->rx_buffer_info[i];
583
584 while (cleaned_count--) {
585 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
586
587 if (!bi->page_dma &&
588 (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) {
589 if (!bi->page) {
590 bi->page = alloc_page(GFP_ATOMIC);
591 if (!bi->page) {
592 adapter->alloc_rx_page_failed++;
593 goto no_buffers;
594 }
595 bi->page_offset = 0;
596 } else {
597 /* use a half page if we're re-using */
598 bi->page_offset ^= (PAGE_SIZE / 2);
599 }
600
601 bi->page_dma = pci_map_page(pdev, bi->page,
602 bi->page_offset,
603 (PAGE_SIZE / 2),
604 PCI_DMA_FROMDEVICE);
605 }
606
607 if (!bi->skb) {
608 struct sk_buff *skb;
609 skb = netdev_alloc_skb(adapter->netdev,
610 (rx_ring->rx_buf_len +
611 NET_IP_ALIGN));
612
613 if (!skb) {
614 adapter->alloc_rx_buff_failed++;
615 goto no_buffers;
616 }
617
618 /*
619 * Make buffer alignment 2 beyond a 16 byte boundary
620 * this will result in a 16 byte aligned IP header after
621 * the 14 byte MAC header is removed
622 */
623 skb_reserve(skb, NET_IP_ALIGN);
624
625 bi->skb = skb;
626 bi->dma = pci_map_single(pdev, skb->data,
627 rx_ring->rx_buf_len,
628 PCI_DMA_FROMDEVICE);
629 }
630 /* Refresh the desc even if buffer_addrs didn't change because
631 * each write-back erases this info. */
632 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
633 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
634 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
635 } else {
636 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
637 }
638
639 i++;
640 if (i == rx_ring->count)
641 i = 0;
642 bi = &rx_ring->rx_buffer_info[i];
643 }
644
645 no_buffers:
646 if (rx_ring->next_to_use != i) {
647 rx_ring->next_to_use = i;
648 if (i-- == 0)
649 i = (rx_ring->count - 1);
650
651 ixgbe_release_rx_desc(&adapter->hw, rx_ring, i);
652 }
653 }
654
655 static inline u16 ixgbe_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
656 {
657 return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
658 }
659
660 static inline u16 ixgbe_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
661 {
662 return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
663 }
664
665 static inline u32 ixgbe_get_rsc_count(union ixgbe_adv_rx_desc *rx_desc)
666 {
667 return (le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
668 IXGBE_RXDADV_RSCCNT_MASK) >>
669 IXGBE_RXDADV_RSCCNT_SHIFT;
670 }
671
672 /**
673 * ixgbe_transform_rsc_queue - change rsc queue into a full packet
674 * @skb: pointer to the last skb in the rsc queue
675 *
676 * This function changes a queue full of hw rsc buffers into a completed
677 * packet. It uses the ->prev pointers to find the first packet and then
678 * turns it into the frag list owner.
679 **/
680 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb)
681 {
682 unsigned int frag_list_size = 0;
683
684 while (skb->prev) {
685 struct sk_buff *prev = skb->prev;
686 frag_list_size += skb->len;
687 skb->prev = NULL;
688 skb = prev;
689 }
690
691 skb_shinfo(skb)->frag_list = skb->next;
692 skb->next = NULL;
693 skb->len += frag_list_size;
694 skb->data_len += frag_list_size;
695 skb->truesize += frag_list_size;
696 return skb;
697 }
698
699 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
700 struct ixgbe_ring *rx_ring,
701 int *work_done, int work_to_do)
702 {
703 struct ixgbe_adapter *adapter = q_vector->adapter;
704 struct pci_dev *pdev = adapter->pdev;
705 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
706 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
707 struct sk_buff *skb;
708 unsigned int i, rsc_count = 0;
709 u32 len, staterr;
710 u16 hdr_info;
711 bool cleaned = false;
712 int cleaned_count = 0;
713 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
714 #ifdef IXGBE_FCOE
715 int ddp_bytes = 0;
716 #endif /* IXGBE_FCOE */
717
718 i = rx_ring->next_to_clean;
719 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
720 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
721 rx_buffer_info = &rx_ring->rx_buffer_info[i];
722
723 while (staterr & IXGBE_RXD_STAT_DD) {
724 u32 upper_len = 0;
725 if (*work_done >= work_to_do)
726 break;
727 (*work_done)++;
728
729 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
730 hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
731 len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
732 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
733 if (hdr_info & IXGBE_RXDADV_SPH)
734 adapter->rx_hdr_split++;
735 if (len > IXGBE_RX_HDR_SIZE)
736 len = IXGBE_RX_HDR_SIZE;
737 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
738 } else {
739 len = le16_to_cpu(rx_desc->wb.upper.length);
740 }
741
742 cleaned = true;
743 skb = rx_buffer_info->skb;
744 prefetch(skb->data - NET_IP_ALIGN);
745 rx_buffer_info->skb = NULL;
746
747 if (rx_buffer_info->dma) {
748 pci_unmap_single(pdev, rx_buffer_info->dma,
749 rx_ring->rx_buf_len,
750 PCI_DMA_FROMDEVICE);
751 rx_buffer_info->dma = 0;
752 skb_put(skb, len);
753 }
754
755 if (upper_len) {
756 pci_unmap_page(pdev, rx_buffer_info->page_dma,
757 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
758 rx_buffer_info->page_dma = 0;
759 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
760 rx_buffer_info->page,
761 rx_buffer_info->page_offset,
762 upper_len);
763
764 if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
765 (page_count(rx_buffer_info->page) != 1))
766 rx_buffer_info->page = NULL;
767 else
768 get_page(rx_buffer_info->page);
769
770 skb->len += upper_len;
771 skb->data_len += upper_len;
772 skb->truesize += upper_len;
773 }
774
775 i++;
776 if (i == rx_ring->count)
777 i = 0;
778
779 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
780 prefetch(next_rxd);
781 cleaned_count++;
782
783 if (adapter->flags & IXGBE_FLAG2_RSC_CAPABLE)
784 rsc_count = ixgbe_get_rsc_count(rx_desc);
785
786 if (rsc_count) {
787 u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
788 IXGBE_RXDADV_NEXTP_SHIFT;
789 next_buffer = &rx_ring->rx_buffer_info[nextp];
790 rx_ring->rsc_count += (rsc_count - 1);
791 } else {
792 next_buffer = &rx_ring->rx_buffer_info[i];
793 }
794
795 if (staterr & IXGBE_RXD_STAT_EOP) {
796 if (skb->prev)
797 skb = ixgbe_transform_rsc_queue(skb);
798 rx_ring->stats.packets++;
799 rx_ring->stats.bytes += skb->len;
800 } else {
801 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
802 rx_buffer_info->skb = next_buffer->skb;
803 rx_buffer_info->dma = next_buffer->dma;
804 next_buffer->skb = skb;
805 next_buffer->dma = 0;
806 } else {
807 skb->next = next_buffer->skb;
808 skb->next->prev = skb;
809 }
810 adapter->non_eop_descs++;
811 goto next_desc;
812 }
813
814 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
815 dev_kfree_skb_irq(skb);
816 goto next_desc;
817 }
818
819 ixgbe_rx_checksum(adapter, rx_desc, skb);
820
821 /* probably a little skewed due to removing CRC */
822 total_rx_bytes += skb->len;
823 total_rx_packets++;
824
825 skb->protocol = eth_type_trans(skb, adapter->netdev);
826 #ifdef IXGBE_FCOE
827 /* if ddp, not passing to ULD unless for FCP_RSP or error */
828 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
829 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
830 if (!ddp_bytes)
831 goto next_desc;
832 }
833 #endif /* IXGBE_FCOE */
834 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
835
836 next_desc:
837 rx_desc->wb.upper.status_error = 0;
838
839 /* return some buffers to hardware, one at a time is too slow */
840 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
841 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
842 cleaned_count = 0;
843 }
844
845 /* use prefetched values */
846 rx_desc = next_rxd;
847 rx_buffer_info = &rx_ring->rx_buffer_info[i];
848
849 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
850 }
851
852 rx_ring->next_to_clean = i;
853 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
854
855 if (cleaned_count)
856 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
857
858 #ifdef IXGBE_FCOE
859 /* include DDPed FCoE data */
860 if (ddp_bytes > 0) {
861 unsigned int mss;
862
863 mss = adapter->netdev->mtu - sizeof(struct fcoe_hdr) -
864 sizeof(struct fc_frame_header) -
865 sizeof(struct fcoe_crc_eof);
866 if (mss > 512)
867 mss &= ~511;
868 total_rx_bytes += ddp_bytes;
869 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
870 }
871 #endif /* IXGBE_FCOE */
872
873 rx_ring->total_packets += total_rx_packets;
874 rx_ring->total_bytes += total_rx_bytes;
875 adapter->net_stats.rx_bytes += total_rx_bytes;
876 adapter->net_stats.rx_packets += total_rx_packets;
877
878 return cleaned;
879 }
880
881 static int ixgbe_clean_rxonly(struct napi_struct *, int);
882 /**
883 * ixgbe_configure_msix - Configure MSI-X hardware
884 * @adapter: board private structure
885 *
886 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
887 * interrupts.
888 **/
889 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
890 {
891 struct ixgbe_q_vector *q_vector;
892 int i, j, q_vectors, v_idx, r_idx;
893 u32 mask;
894
895 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
896
897 /*
898 * Populate the IVAR table and set the ITR values to the
899 * corresponding register.
900 */
901 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
902 q_vector = adapter->q_vector[v_idx];
903 /* XXX for_each_bit(...) */
904 r_idx = find_first_bit(q_vector->rxr_idx,
905 adapter->num_rx_queues);
906
907 for (i = 0; i < q_vector->rxr_count; i++) {
908 j = adapter->rx_ring[r_idx].reg_idx;
909 ixgbe_set_ivar(adapter, 0, j, v_idx);
910 r_idx = find_next_bit(q_vector->rxr_idx,
911 adapter->num_rx_queues,
912 r_idx + 1);
913 }
914 r_idx = find_first_bit(q_vector->txr_idx,
915 adapter->num_tx_queues);
916
917 for (i = 0; i < q_vector->txr_count; i++) {
918 j = adapter->tx_ring[r_idx].reg_idx;
919 ixgbe_set_ivar(adapter, 1, j, v_idx);
920 r_idx = find_next_bit(q_vector->txr_idx,
921 adapter->num_tx_queues,
922 r_idx + 1);
923 }
924
925 /* if this is a tx only vector halve the interrupt rate */
926 if (q_vector->txr_count && !q_vector->rxr_count)
927 q_vector->eitr = (adapter->eitr_param >> 1);
928 else if (q_vector->rxr_count)
929 /* rx only */
930 q_vector->eitr = adapter->eitr_param;
931
932 ixgbe_write_eitr(q_vector);
933 }
934
935 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
936 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
937 v_idx);
938 else if (adapter->hw.mac.type == ixgbe_mac_82599EB)
939 ixgbe_set_ivar(adapter, -1, 1, v_idx);
940 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
941
942 /* set up to autoclear timer, and the vectors */
943 mask = IXGBE_EIMS_ENABLE_MASK;
944 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
945 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
946 }
947
948 enum latency_range {
949 lowest_latency = 0,
950 low_latency = 1,
951 bulk_latency = 2,
952 latency_invalid = 255
953 };
954
955 /**
956 * ixgbe_update_itr - update the dynamic ITR value based on statistics
957 * @adapter: pointer to adapter
958 * @eitr: eitr setting (ints per sec) to give last timeslice
959 * @itr_setting: current throttle rate in ints/second
960 * @packets: the number of packets during this measurement interval
961 * @bytes: the number of bytes during this measurement interval
962 *
963 * Stores a new ITR value based on packets and byte
964 * counts during the last interrupt. The advantage of per interrupt
965 * computation is faster updates and more accurate ITR for the current
966 * traffic pattern. Constants in this function were computed
967 * based on theoretical maximum wire speed and thresholds were set based
968 * on testing data as well as attempting to minimize response time
969 * while increasing bulk throughput.
970 * this functionality is controlled by the InterruptThrottleRate module
971 * parameter (see ixgbe_param.c)
972 **/
973 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
974 u32 eitr, u8 itr_setting,
975 int packets, int bytes)
976 {
977 unsigned int retval = itr_setting;
978 u32 timepassed_us;
979 u64 bytes_perint;
980
981 if (packets == 0)
982 goto update_itr_done;
983
984
985 /* simple throttlerate management
986 * 0-20MB/s lowest (100000 ints/s)
987 * 20-100MB/s low (20000 ints/s)
988 * 100-1249MB/s bulk (8000 ints/s)
989 */
990 /* what was last interrupt timeslice? */
991 timepassed_us = 1000000/eitr;
992 bytes_perint = bytes / timepassed_us; /* bytes/usec */
993
994 switch (itr_setting) {
995 case lowest_latency:
996 if (bytes_perint > adapter->eitr_low)
997 retval = low_latency;
998 break;
999 case low_latency:
1000 if (bytes_perint > adapter->eitr_high)
1001 retval = bulk_latency;
1002 else if (bytes_perint <= adapter->eitr_low)
1003 retval = lowest_latency;
1004 break;
1005 case bulk_latency:
1006 if (bytes_perint <= adapter->eitr_high)
1007 retval = low_latency;
1008 break;
1009 }
1010
1011 update_itr_done:
1012 return retval;
1013 }
1014
1015 /**
1016 * ixgbe_write_eitr - write EITR register in hardware specific way
1017 * @q_vector: structure containing interrupt and ring information
1018 *
1019 * This function is made to be called by ethtool and by the driver
1020 * when it needs to update EITR registers at runtime. Hardware
1021 * specific quirks/differences are taken care of here.
1022 */
1023 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1024 {
1025 struct ixgbe_adapter *adapter = q_vector->adapter;
1026 struct ixgbe_hw *hw = &adapter->hw;
1027 int v_idx = q_vector->v_idx;
1028 u32 itr_reg = EITR_INTS_PER_SEC_TO_REG(q_vector->eitr);
1029
1030 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1031 /* must write high and low 16 bits to reset counter */
1032 itr_reg |= (itr_reg << 16);
1033 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1034 /*
1035 * set the WDIS bit to not clear the timer bits and cause an
1036 * immediate assertion of the interrupt
1037 */
1038 itr_reg |= IXGBE_EITR_CNT_WDIS;
1039 }
1040 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1041 }
1042
1043 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
1044 {
1045 struct ixgbe_adapter *adapter = q_vector->adapter;
1046 u32 new_itr;
1047 u8 current_itr, ret_itr;
1048 int i, r_idx;
1049 struct ixgbe_ring *rx_ring, *tx_ring;
1050
1051 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1052 for (i = 0; i < q_vector->txr_count; i++) {
1053 tx_ring = &(adapter->tx_ring[r_idx]);
1054 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1055 q_vector->tx_itr,
1056 tx_ring->total_packets,
1057 tx_ring->total_bytes);
1058 /* if the result for this queue would decrease interrupt
1059 * rate for this vector then use that result */
1060 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
1061 q_vector->tx_itr - 1 : ret_itr);
1062 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1063 r_idx + 1);
1064 }
1065
1066 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1067 for (i = 0; i < q_vector->rxr_count; i++) {
1068 rx_ring = &(adapter->rx_ring[r_idx]);
1069 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1070 q_vector->rx_itr,
1071 rx_ring->total_packets,
1072 rx_ring->total_bytes);
1073 /* if the result for this queue would decrease interrupt
1074 * rate for this vector then use that result */
1075 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
1076 q_vector->rx_itr - 1 : ret_itr);
1077 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1078 r_idx + 1);
1079 }
1080
1081 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1082
1083 switch (current_itr) {
1084 /* counts and packets in update_itr are dependent on these numbers */
1085 case lowest_latency:
1086 new_itr = 100000;
1087 break;
1088 case low_latency:
1089 new_itr = 20000; /* aka hwitr = ~200 */
1090 break;
1091 case bulk_latency:
1092 default:
1093 new_itr = 8000;
1094 break;
1095 }
1096
1097 if (new_itr != q_vector->eitr) {
1098 /* do an exponential smoothing */
1099 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1100
1101 /* save the algorithm value here, not the smoothed one */
1102 q_vector->eitr = new_itr;
1103
1104 ixgbe_write_eitr(q_vector);
1105 }
1106
1107 return;
1108 }
1109
1110 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1111 {
1112 struct ixgbe_hw *hw = &adapter->hw;
1113
1114 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1115 (eicr & IXGBE_EICR_GPI_SDP1)) {
1116 DPRINTK(PROBE, CRIT, "Fan has stopped, replace the adapter\n");
1117 /* write to clear the interrupt */
1118 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1119 }
1120 }
1121
1122 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1123 {
1124 struct ixgbe_hw *hw = &adapter->hw;
1125
1126 if (eicr & IXGBE_EICR_GPI_SDP1) {
1127 /* Clear the interrupt */
1128 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1129 schedule_work(&adapter->multispeed_fiber_task);
1130 } else if (eicr & IXGBE_EICR_GPI_SDP2) {
1131 /* Clear the interrupt */
1132 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1133 schedule_work(&adapter->sfp_config_module_task);
1134 } else {
1135 /* Interrupt isn't for us... */
1136 return;
1137 }
1138 }
1139
1140 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1141 {
1142 struct ixgbe_hw *hw = &adapter->hw;
1143
1144 adapter->lsc_int++;
1145 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1146 adapter->link_check_timeout = jiffies;
1147 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1148 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1149 schedule_work(&adapter->watchdog_task);
1150 }
1151 }
1152
1153 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1154 {
1155 struct net_device *netdev = data;
1156 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1157 struct ixgbe_hw *hw = &adapter->hw;
1158 u32 eicr;
1159
1160 /*
1161 * Workaround for Silicon errata. Use clear-by-write instead
1162 * of clear-by-read. Reading with EICS will return the
1163 * interrupt causes without clearing, which later be done
1164 * with the write to EICR.
1165 */
1166 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1167 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1168
1169 if (eicr & IXGBE_EICR_LSC)
1170 ixgbe_check_lsc(adapter);
1171
1172 if (hw->mac.type == ixgbe_mac_82598EB)
1173 ixgbe_check_fan_failure(adapter, eicr);
1174
1175 if (hw->mac.type == ixgbe_mac_82599EB) {
1176 ixgbe_check_sfp_event(adapter, eicr);
1177
1178 /* Handle Flow Director Full threshold interrupt */
1179 if (eicr & IXGBE_EICR_FLOW_DIR) {
1180 int i;
1181 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_FLOW_DIR);
1182 /* Disable transmits before FDIR Re-initialization */
1183 netif_tx_stop_all_queues(netdev);
1184 for (i = 0; i < adapter->num_tx_queues; i++) {
1185 struct ixgbe_ring *tx_ring =
1186 &adapter->tx_ring[i];
1187 if (test_and_clear_bit(__IXGBE_FDIR_INIT_DONE,
1188 &tx_ring->reinit_state))
1189 schedule_work(&adapter->fdir_reinit_task);
1190 }
1191 }
1192 }
1193 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1194 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
1195
1196 return IRQ_HANDLED;
1197 }
1198
1199 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1200 u64 qmask)
1201 {
1202 u32 mask;
1203
1204 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1205 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1206 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1207 } else {
1208 mask = (qmask & 0xFFFFFFFF);
1209 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(0), mask);
1210 mask = (qmask >> 32);
1211 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(1), mask);
1212 }
1213 /* skip the flush */
1214 }
1215
1216 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1217 u64 qmask)
1218 {
1219 u32 mask;
1220
1221 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1222 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1223 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, mask);
1224 } else {
1225 mask = (qmask & 0xFFFFFFFF);
1226 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), mask);
1227 mask = (qmask >> 32);
1228 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), mask);
1229 }
1230 /* skip the flush */
1231 }
1232
1233 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
1234 {
1235 struct ixgbe_q_vector *q_vector = data;
1236 struct ixgbe_adapter *adapter = q_vector->adapter;
1237 struct ixgbe_ring *tx_ring;
1238 int i, r_idx;
1239
1240 if (!q_vector->txr_count)
1241 return IRQ_HANDLED;
1242
1243 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1244 for (i = 0; i < q_vector->txr_count; i++) {
1245 tx_ring = &(adapter->tx_ring[r_idx]);
1246 tx_ring->total_bytes = 0;
1247 tx_ring->total_packets = 0;
1248 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1249 r_idx + 1);
1250 }
1251
1252 /* disable interrupts on this vector only */
1253 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1254 napi_schedule(&q_vector->napi);
1255
1256 return IRQ_HANDLED;
1257 }
1258
1259 /**
1260 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
1261 * @irq: unused
1262 * @data: pointer to our q_vector struct for this interrupt vector
1263 **/
1264 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
1265 {
1266 struct ixgbe_q_vector *q_vector = data;
1267 struct ixgbe_adapter *adapter = q_vector->adapter;
1268 struct ixgbe_ring *rx_ring;
1269 int r_idx;
1270 int i;
1271
1272 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1273 for (i = 0; i < q_vector->rxr_count; i++) {
1274 rx_ring = &(adapter->rx_ring[r_idx]);
1275 rx_ring->total_bytes = 0;
1276 rx_ring->total_packets = 0;
1277 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1278 r_idx + 1);
1279 }
1280
1281 if (!q_vector->rxr_count)
1282 return IRQ_HANDLED;
1283
1284 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1285 rx_ring = &(adapter->rx_ring[r_idx]);
1286 /* disable interrupts on this vector only */
1287 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1288 napi_schedule(&q_vector->napi);
1289
1290 return IRQ_HANDLED;
1291 }
1292
1293 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1294 {
1295 struct ixgbe_q_vector *q_vector = data;
1296 struct ixgbe_adapter *adapter = q_vector->adapter;
1297 struct ixgbe_ring *ring;
1298 int r_idx;
1299 int i;
1300
1301 if (!q_vector->txr_count && !q_vector->rxr_count)
1302 return IRQ_HANDLED;
1303
1304 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1305 for (i = 0; i < q_vector->txr_count; i++) {
1306 ring = &(adapter->tx_ring[r_idx]);
1307 ring->total_bytes = 0;
1308 ring->total_packets = 0;
1309 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1310 r_idx + 1);
1311 }
1312
1313 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1314 for (i = 0; i < q_vector->rxr_count; i++) {
1315 ring = &(adapter->rx_ring[r_idx]);
1316 ring->total_bytes = 0;
1317 ring->total_packets = 0;
1318 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1319 r_idx + 1);
1320 }
1321
1322 /* disable interrupts on this vector only */
1323 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1324 napi_schedule(&q_vector->napi);
1325
1326 return IRQ_HANDLED;
1327 }
1328
1329 /**
1330 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1331 * @napi: napi struct with our devices info in it
1332 * @budget: amount of work driver is allowed to do this pass, in packets
1333 *
1334 * This function is optimized for cleaning one queue only on a single
1335 * q_vector!!!
1336 **/
1337 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1338 {
1339 struct ixgbe_q_vector *q_vector =
1340 container_of(napi, struct ixgbe_q_vector, napi);
1341 struct ixgbe_adapter *adapter = q_vector->adapter;
1342 struct ixgbe_ring *rx_ring = NULL;
1343 int work_done = 0;
1344 long r_idx;
1345
1346 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1347 rx_ring = &(adapter->rx_ring[r_idx]);
1348 #ifdef CONFIG_IXGBE_DCA
1349 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1350 ixgbe_update_rx_dca(adapter, rx_ring);
1351 #endif
1352
1353 ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
1354
1355 /* If all Rx work done, exit the polling mode */
1356 if (work_done < budget) {
1357 napi_complete(napi);
1358 if (adapter->itr_setting & 1)
1359 ixgbe_set_itr_msix(q_vector);
1360 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1361 ixgbe_irq_enable_queues(adapter,
1362 ((u64)1 << q_vector->v_idx));
1363 }
1364
1365 return work_done;
1366 }
1367
1368 /**
1369 * ixgbe_clean_rxtx_many - msix (aka one shot) rx clean routine
1370 * @napi: napi struct with our devices info in it
1371 * @budget: amount of work driver is allowed to do this pass, in packets
1372 *
1373 * This function will clean more than one rx queue associated with a
1374 * q_vector.
1375 **/
1376 static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
1377 {
1378 struct ixgbe_q_vector *q_vector =
1379 container_of(napi, struct ixgbe_q_vector, napi);
1380 struct ixgbe_adapter *adapter = q_vector->adapter;
1381 struct ixgbe_ring *ring = NULL;
1382 int work_done = 0, i;
1383 long r_idx;
1384 bool tx_clean_complete = true;
1385
1386 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1387 for (i = 0; i < q_vector->txr_count; i++) {
1388 ring = &(adapter->tx_ring[r_idx]);
1389 #ifdef CONFIG_IXGBE_DCA
1390 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1391 ixgbe_update_tx_dca(adapter, ring);
1392 #endif
1393 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
1394 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1395 r_idx + 1);
1396 }
1397
1398 /* attempt to distribute budget to each queue fairly, but don't allow
1399 * the budget to go below 1 because we'll exit polling */
1400 budget /= (q_vector->rxr_count ?: 1);
1401 budget = max(budget, 1);
1402 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1403 for (i = 0; i < q_vector->rxr_count; i++) {
1404 ring = &(adapter->rx_ring[r_idx]);
1405 #ifdef CONFIG_IXGBE_DCA
1406 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1407 ixgbe_update_rx_dca(adapter, ring);
1408 #endif
1409 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
1410 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1411 r_idx + 1);
1412 }
1413
1414 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1415 ring = &(adapter->rx_ring[r_idx]);
1416 /* If all Rx work done, exit the polling mode */
1417 if (work_done < budget) {
1418 napi_complete(napi);
1419 if (adapter->itr_setting & 1)
1420 ixgbe_set_itr_msix(q_vector);
1421 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1422 ixgbe_irq_enable_queues(adapter,
1423 ((u64)1 << q_vector->v_idx));
1424 return 0;
1425 }
1426
1427 return work_done;
1428 }
1429
1430 /**
1431 * ixgbe_clean_txonly - msix (aka one shot) tx clean routine
1432 * @napi: napi struct with our devices info in it
1433 * @budget: amount of work driver is allowed to do this pass, in packets
1434 *
1435 * This function is optimized for cleaning one queue only on a single
1436 * q_vector!!!
1437 **/
1438 static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
1439 {
1440 struct ixgbe_q_vector *q_vector =
1441 container_of(napi, struct ixgbe_q_vector, napi);
1442 struct ixgbe_adapter *adapter = q_vector->adapter;
1443 struct ixgbe_ring *tx_ring = NULL;
1444 int work_done = 0;
1445 long r_idx;
1446
1447 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1448 tx_ring = &(adapter->tx_ring[r_idx]);
1449 #ifdef CONFIG_IXGBE_DCA
1450 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1451 ixgbe_update_tx_dca(adapter, tx_ring);
1452 #endif
1453
1454 if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
1455 work_done = budget;
1456
1457 /* If all Rx work done, exit the polling mode */
1458 if (work_done < budget) {
1459 napi_complete(napi);
1460 if (adapter->itr_setting & 1)
1461 ixgbe_set_itr_msix(q_vector);
1462 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1463 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
1464 }
1465
1466 return work_done;
1467 }
1468
1469 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
1470 int r_idx)
1471 {
1472 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1473
1474 set_bit(r_idx, q_vector->rxr_idx);
1475 q_vector->rxr_count++;
1476 }
1477
1478 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
1479 int t_idx)
1480 {
1481 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1482
1483 set_bit(t_idx, q_vector->txr_idx);
1484 q_vector->txr_count++;
1485 }
1486
1487 /**
1488 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
1489 * @adapter: board private structure to initialize
1490 * @vectors: allotted vector count for descriptor rings
1491 *
1492 * This function maps descriptor rings to the queue-specific vectors
1493 * we were allotted through the MSI-X enabling code. Ideally, we'd have
1494 * one vector per ring/queue, but on a constrained vector budget, we
1495 * group the rings as "efficiently" as possible. You would add new
1496 * mapping configurations in here.
1497 **/
1498 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
1499 int vectors)
1500 {
1501 int v_start = 0;
1502 int rxr_idx = 0, txr_idx = 0;
1503 int rxr_remaining = adapter->num_rx_queues;
1504 int txr_remaining = adapter->num_tx_queues;
1505 int i, j;
1506 int rqpv, tqpv;
1507 int err = 0;
1508
1509 /* No mapping required if MSI-X is disabled. */
1510 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1511 goto out;
1512
1513 /*
1514 * The ideal configuration...
1515 * We have enough vectors to map one per queue.
1516 */
1517 if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1518 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1519 map_vector_to_rxq(adapter, v_start, rxr_idx);
1520
1521 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1522 map_vector_to_txq(adapter, v_start, txr_idx);
1523
1524 goto out;
1525 }
1526
1527 /*
1528 * If we don't have enough vectors for a 1-to-1
1529 * mapping, we'll have to group them so there are
1530 * multiple queues per vector.
1531 */
1532 /* Re-adjusting *qpv takes care of the remainder. */
1533 for (i = v_start; i < vectors; i++) {
1534 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
1535 for (j = 0; j < rqpv; j++) {
1536 map_vector_to_rxq(adapter, i, rxr_idx);
1537 rxr_idx++;
1538 rxr_remaining--;
1539 }
1540 }
1541 for (i = v_start; i < vectors; i++) {
1542 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
1543 for (j = 0; j < tqpv; j++) {
1544 map_vector_to_txq(adapter, i, txr_idx);
1545 txr_idx++;
1546 txr_remaining--;
1547 }
1548 }
1549
1550 out:
1551 return err;
1552 }
1553
1554 /**
1555 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
1556 * @adapter: board private structure
1557 *
1558 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
1559 * interrupts from the kernel.
1560 **/
1561 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
1562 {
1563 struct net_device *netdev = adapter->netdev;
1564 irqreturn_t (*handler)(int, void *);
1565 int i, vector, q_vectors, err;
1566 int ri=0, ti=0;
1567
1568 /* Decrement for Other and TCP Timer vectors */
1569 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1570
1571 /* Map the Tx/Rx rings to the vectors we were allotted. */
1572 err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
1573 if (err)
1574 goto out;
1575
1576 #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
1577 (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
1578 &ixgbe_msix_clean_many)
1579 for (vector = 0; vector < q_vectors; vector++) {
1580 handler = SET_HANDLER(adapter->q_vector[vector]);
1581
1582 if(handler == &ixgbe_msix_clean_rx) {
1583 sprintf(adapter->name[vector], "%s-%s-%d",
1584 netdev->name, "rx", ri++);
1585 }
1586 else if(handler == &ixgbe_msix_clean_tx) {
1587 sprintf(adapter->name[vector], "%s-%s-%d",
1588 netdev->name, "tx", ti++);
1589 }
1590 else
1591 sprintf(adapter->name[vector], "%s-%s-%d",
1592 netdev->name, "TxRx", vector);
1593
1594 err = request_irq(adapter->msix_entries[vector].vector,
1595 handler, 0, adapter->name[vector],
1596 adapter->q_vector[vector]);
1597 if (err) {
1598 DPRINTK(PROBE, ERR,
1599 "request_irq failed for MSIX interrupt "
1600 "Error: %d\n", err);
1601 goto free_queue_irqs;
1602 }
1603 }
1604
1605 sprintf(adapter->name[vector], "%s:lsc", netdev->name);
1606 err = request_irq(adapter->msix_entries[vector].vector,
1607 &ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
1608 if (err) {
1609 DPRINTK(PROBE, ERR,
1610 "request_irq for msix_lsc failed: %d\n", err);
1611 goto free_queue_irqs;
1612 }
1613
1614 return 0;
1615
1616 free_queue_irqs:
1617 for (i = vector - 1; i >= 0; i--)
1618 free_irq(adapter->msix_entries[--vector].vector,
1619 adapter->q_vector[i]);
1620 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
1621 pci_disable_msix(adapter->pdev);
1622 kfree(adapter->msix_entries);
1623 adapter->msix_entries = NULL;
1624 out:
1625 return err;
1626 }
1627
1628 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
1629 {
1630 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1631 u8 current_itr;
1632 u32 new_itr = q_vector->eitr;
1633 struct ixgbe_ring *rx_ring = &adapter->rx_ring[0];
1634 struct ixgbe_ring *tx_ring = &adapter->tx_ring[0];
1635
1636 q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
1637 q_vector->tx_itr,
1638 tx_ring->total_packets,
1639 tx_ring->total_bytes);
1640 q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
1641 q_vector->rx_itr,
1642 rx_ring->total_packets,
1643 rx_ring->total_bytes);
1644
1645 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1646
1647 switch (current_itr) {
1648 /* counts and packets in update_itr are dependent on these numbers */
1649 case lowest_latency:
1650 new_itr = 100000;
1651 break;
1652 case low_latency:
1653 new_itr = 20000; /* aka hwitr = ~200 */
1654 break;
1655 case bulk_latency:
1656 new_itr = 8000;
1657 break;
1658 default:
1659 break;
1660 }
1661
1662 if (new_itr != q_vector->eitr) {
1663 /* do an exponential smoothing */
1664 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1665
1666 /* save the algorithm value here, not the smoothed one */
1667 q_vector->eitr = new_itr;
1668
1669 ixgbe_write_eitr(q_vector);
1670 }
1671
1672 return;
1673 }
1674
1675 /**
1676 * ixgbe_irq_enable - Enable default interrupt generation settings
1677 * @adapter: board private structure
1678 **/
1679 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
1680 {
1681 u32 mask;
1682
1683 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
1684 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
1685 mask |= IXGBE_EIMS_GPI_SDP1;
1686 if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1687 mask |= IXGBE_EIMS_ECC;
1688 mask |= IXGBE_EIMS_GPI_SDP1;
1689 mask |= IXGBE_EIMS_GPI_SDP2;
1690 }
1691 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
1692 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
1693 mask |= IXGBE_EIMS_FLOW_DIR;
1694
1695 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1696 ixgbe_irq_enable_queues(adapter, ~0);
1697 IXGBE_WRITE_FLUSH(&adapter->hw);
1698 }
1699
1700 /**
1701 * ixgbe_intr - legacy mode Interrupt Handler
1702 * @irq: interrupt number
1703 * @data: pointer to a network interface device structure
1704 **/
1705 static irqreturn_t ixgbe_intr(int irq, void *data)
1706 {
1707 struct net_device *netdev = data;
1708 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1709 struct ixgbe_hw *hw = &adapter->hw;
1710 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1711 u32 eicr;
1712
1713 /*
1714 * Workaround for silicon errata. Mask the interrupts
1715 * before the read of EICR.
1716 */
1717 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
1718
1719 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
1720 * therefore no explict interrupt disable is necessary */
1721 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
1722 if (!eicr) {
1723 /* shared interrupt alert!
1724 * make sure interrupts are enabled because the read will
1725 * have disabled interrupts due to EIAM */
1726 ixgbe_irq_enable(adapter);
1727 return IRQ_NONE; /* Not our interrupt */
1728 }
1729
1730 if (eicr & IXGBE_EICR_LSC)
1731 ixgbe_check_lsc(adapter);
1732
1733 if (hw->mac.type == ixgbe_mac_82599EB)
1734 ixgbe_check_sfp_event(adapter, eicr);
1735
1736 ixgbe_check_fan_failure(adapter, eicr);
1737
1738 if (napi_schedule_prep(&(q_vector->napi))) {
1739 adapter->tx_ring[0].total_packets = 0;
1740 adapter->tx_ring[0].total_bytes = 0;
1741 adapter->rx_ring[0].total_packets = 0;
1742 adapter->rx_ring[0].total_bytes = 0;
1743 /* would disable interrupts here but EIAM disabled it */
1744 __napi_schedule(&(q_vector->napi));
1745 }
1746
1747 return IRQ_HANDLED;
1748 }
1749
1750 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
1751 {
1752 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1753
1754 for (i = 0; i < q_vectors; i++) {
1755 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
1756 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
1757 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
1758 q_vector->rxr_count = 0;
1759 q_vector->txr_count = 0;
1760 }
1761 }
1762
1763 /**
1764 * ixgbe_request_irq - initialize interrupts
1765 * @adapter: board private structure
1766 *
1767 * Attempts to configure interrupts using the best available
1768 * capabilities of the hardware and kernel.
1769 **/
1770 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
1771 {
1772 struct net_device *netdev = adapter->netdev;
1773 int err;
1774
1775 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1776 err = ixgbe_request_msix_irqs(adapter);
1777 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
1778 err = request_irq(adapter->pdev->irq, &ixgbe_intr, 0,
1779 netdev->name, netdev);
1780 } else {
1781 err = request_irq(adapter->pdev->irq, &ixgbe_intr, IRQF_SHARED,
1782 netdev->name, netdev);
1783 }
1784
1785 if (err)
1786 DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err);
1787
1788 return err;
1789 }
1790
1791 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
1792 {
1793 struct net_device *netdev = adapter->netdev;
1794
1795 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1796 int i, q_vectors;
1797
1798 q_vectors = adapter->num_msix_vectors;
1799
1800 i = q_vectors - 1;
1801 free_irq(adapter->msix_entries[i].vector, netdev);
1802
1803 i--;
1804 for (; i >= 0; i--) {
1805 free_irq(adapter->msix_entries[i].vector,
1806 adapter->q_vector[i]);
1807 }
1808
1809 ixgbe_reset_q_vectors(adapter);
1810 } else {
1811 free_irq(adapter->pdev->irq, netdev);
1812 }
1813 }
1814
1815 /**
1816 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
1817 * @adapter: board private structure
1818 **/
1819 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
1820 {
1821 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1822 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
1823 } else {
1824 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
1825 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
1826 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
1827 }
1828 IXGBE_WRITE_FLUSH(&adapter->hw);
1829 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1830 int i;
1831 for (i = 0; i < adapter->num_msix_vectors; i++)
1832 synchronize_irq(adapter->msix_entries[i].vector);
1833 } else {
1834 synchronize_irq(adapter->pdev->irq);
1835 }
1836 }
1837
1838 /**
1839 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
1840 *
1841 **/
1842 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
1843 {
1844 struct ixgbe_hw *hw = &adapter->hw;
1845
1846 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
1847 EITR_INTS_PER_SEC_TO_REG(adapter->eitr_param));
1848
1849 ixgbe_set_ivar(adapter, 0, 0, 0);
1850 ixgbe_set_ivar(adapter, 1, 0, 0);
1851
1852 map_vector_to_rxq(adapter, 0, 0);
1853 map_vector_to_txq(adapter, 0, 0);
1854
1855 DPRINTK(HW, INFO, "Legacy interrupt IVAR setup done\n");
1856 }
1857
1858 /**
1859 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
1860 * @adapter: board private structure
1861 *
1862 * Configure the Tx unit of the MAC after a reset.
1863 **/
1864 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
1865 {
1866 u64 tdba;
1867 struct ixgbe_hw *hw = &adapter->hw;
1868 u32 i, j, tdlen, txctrl;
1869
1870 /* Setup the HW Tx Head and Tail descriptor pointers */
1871 for (i = 0; i < adapter->num_tx_queues; i++) {
1872 struct ixgbe_ring *ring = &adapter->tx_ring[i];
1873 j = ring->reg_idx;
1874 tdba = ring->dma;
1875 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1876 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(j),
1877 (tdba & DMA_BIT_MASK(32)));
1878 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(j), (tdba >> 32));
1879 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(j), tdlen);
1880 IXGBE_WRITE_REG(hw, IXGBE_TDH(j), 0);
1881 IXGBE_WRITE_REG(hw, IXGBE_TDT(j), 0);
1882 adapter->tx_ring[i].head = IXGBE_TDH(j);
1883 adapter->tx_ring[i].tail = IXGBE_TDT(j);
1884 /* Disable Tx Head Writeback RO bit, since this hoses
1885 * bookkeeping if things aren't delivered in order.
1886 */
1887 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(j));
1888 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1889 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(j), txctrl);
1890 }
1891 if (hw->mac.type == ixgbe_mac_82599EB) {
1892 /* We enable 8 traffic classes, DCB only */
1893 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
1894 IXGBE_WRITE_REG(hw, IXGBE_MTQC, (IXGBE_MTQC_RT_ENA |
1895 IXGBE_MTQC_8TC_8TQ));
1896 }
1897 }
1898
1899 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1900
1901 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter, int index)
1902 {
1903 struct ixgbe_ring *rx_ring;
1904 u32 srrctl;
1905 int queue0 = 0;
1906 unsigned long mask;
1907 struct ixgbe_ring_feature *feature = adapter->ring_feature;
1908
1909 if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1910 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
1911 int dcb_i = feature[RING_F_DCB].indices;
1912 if (dcb_i == 8)
1913 queue0 = index >> 4;
1914 else if (dcb_i == 4)
1915 queue0 = index >> 5;
1916 else
1917 dev_err(&adapter->pdev->dev, "Invalid DCB "
1918 "configuration\n");
1919 #ifdef IXGBE_FCOE
1920 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
1921 struct ixgbe_ring_feature *f;
1922
1923 rx_ring = &adapter->rx_ring[queue0];
1924 f = &adapter->ring_feature[RING_F_FCOE];
1925 if ((queue0 == 0) && (index > rx_ring->reg_idx))
1926 queue0 = f->mask + index -
1927 rx_ring->reg_idx - 1;
1928 }
1929 #endif /* IXGBE_FCOE */
1930 } else {
1931 queue0 = index;
1932 }
1933 } else {
1934 mask = (unsigned long) feature[RING_F_RSS].mask;
1935 queue0 = index & mask;
1936 index = index & mask;
1937 }
1938
1939 rx_ring = &adapter->rx_ring[queue0];
1940
1941 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
1942
1943 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
1944 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
1945
1946 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
1947 IXGBE_SRRCTL_BSIZEHDR_MASK;
1948
1949 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1950 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
1951 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1952 #else
1953 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1954 #endif
1955 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1956 } else {
1957 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
1958 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1959 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1960 }
1961
1962 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
1963 }
1964
1965 static u32 ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
1966 {
1967 u32 mrqc = 0;
1968 int mask;
1969
1970 if (!(adapter->hw.mac.type == ixgbe_mac_82599EB))
1971 return mrqc;
1972
1973 mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
1974 #ifdef CONFIG_IXGBE_DCB
1975 | IXGBE_FLAG_DCB_ENABLED
1976 #endif
1977 );
1978
1979 switch (mask) {
1980 case (IXGBE_FLAG_RSS_ENABLED):
1981 mrqc = IXGBE_MRQC_RSSEN;
1982 break;
1983 #ifdef CONFIG_IXGBE_DCB
1984 case (IXGBE_FLAG_DCB_ENABLED):
1985 mrqc = IXGBE_MRQC_RT8TCEN;
1986 break;
1987 #endif /* CONFIG_IXGBE_DCB */
1988 default:
1989 break;
1990 }
1991
1992 return mrqc;
1993 }
1994
1995 /**
1996 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
1997 * @adapter: board private structure
1998 *
1999 * Configure the Rx unit of the MAC after a reset.
2000 **/
2001 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
2002 {
2003 u64 rdba;
2004 struct ixgbe_hw *hw = &adapter->hw;
2005 struct net_device *netdev = adapter->netdev;
2006 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2007 int i, j;
2008 u32 rdlen, rxctrl, rxcsum;
2009 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2010 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2011 0x6A3E67EA, 0x14364D17, 0x3BED200D};
2012 u32 fctrl, hlreg0;
2013 u32 reta = 0, mrqc = 0;
2014 u32 rdrxctl;
2015 u32 rscctrl;
2016 int rx_buf_len;
2017
2018 /* Decide whether to use packet split mode or not */
2019 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
2020
2021 #ifdef IXGBE_FCOE
2022 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
2023 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
2024 #endif /* IXGBE_FCOE */
2025
2026 /* Set the RX buffer length according to the mode */
2027 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
2028 rx_buf_len = IXGBE_RX_HDR_SIZE;
2029 if (hw->mac.type == ixgbe_mac_82599EB) {
2030 /* PSRTYPE must be initialized in 82599 */
2031 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
2032 IXGBE_PSRTYPE_UDPHDR |
2033 IXGBE_PSRTYPE_IPV4HDR |
2034 IXGBE_PSRTYPE_IPV6HDR |
2035 IXGBE_PSRTYPE_L2HDR;
2036 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(0), psrtype);
2037 }
2038 } else {
2039 if (!(adapter->flags & IXGBE_FLAG2_RSC_ENABLED) &&
2040 (netdev->mtu <= ETH_DATA_LEN))
2041 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
2042 else
2043 rx_buf_len = ALIGN(max_frame, 1024);
2044 }
2045
2046 fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
2047 fctrl |= IXGBE_FCTRL_BAM;
2048 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
2049 fctrl |= IXGBE_FCTRL_PMCF;
2050 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
2051
2052 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
2053 if (adapter->netdev->mtu <= ETH_DATA_LEN)
2054 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
2055 else
2056 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2057 #ifdef IXGBE_FCOE
2058 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
2059 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2060 #endif
2061 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
2062
2063 rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
2064 /* disable receives while setting up the descriptors */
2065 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2066 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2067
2068 /*
2069 * Setup the HW Rx Head and Tail Descriptor Pointers and
2070 * the Base and Length of the Rx Descriptor Ring
2071 */
2072 for (i = 0; i < adapter->num_rx_queues; i++) {
2073 rdba = adapter->rx_ring[i].dma;
2074 j = adapter->rx_ring[i].reg_idx;
2075 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(j), (rdba & DMA_BIT_MASK(32)));
2076 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(j), (rdba >> 32));
2077 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(j), rdlen);
2078 IXGBE_WRITE_REG(hw, IXGBE_RDH(j), 0);
2079 IXGBE_WRITE_REG(hw, IXGBE_RDT(j), 0);
2080 adapter->rx_ring[i].head = IXGBE_RDH(j);
2081 adapter->rx_ring[i].tail = IXGBE_RDT(j);
2082 adapter->rx_ring[i].rx_buf_len = rx_buf_len;
2083
2084 #ifdef IXGBE_FCOE
2085 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
2086 struct ixgbe_ring_feature *f;
2087 f = &adapter->ring_feature[RING_F_FCOE];
2088 if ((rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE) &&
2089 (i >= f->mask) && (i < f->mask + f->indices))
2090 adapter->rx_ring[i].rx_buf_len =
2091 IXGBE_FCOE_JUMBO_FRAME_SIZE;
2092 }
2093
2094 #endif /* IXGBE_FCOE */
2095 ixgbe_configure_srrctl(adapter, j);
2096 }
2097
2098 if (hw->mac.type == ixgbe_mac_82598EB) {
2099 /*
2100 * For VMDq support of different descriptor types or
2101 * buffer sizes through the use of multiple SRRCTL
2102 * registers, RDRXCTL.MVMEN must be set to 1
2103 *
2104 * also, the manual doesn't mention it clearly but DCA hints
2105 * will only use queue 0's tags unless this bit is set. Side
2106 * effects of setting this bit are only that SRRCTL must be
2107 * fully programmed [0..15]
2108 */
2109 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2110 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
2111 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2112 }
2113
2114 /* Program MRQC for the distribution of queues */
2115 mrqc = ixgbe_setup_mrqc(adapter);
2116
2117 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
2118 /* Fill out redirection table */
2119 for (i = 0, j = 0; i < 128; i++, j++) {
2120 if (j == adapter->ring_feature[RING_F_RSS].indices)
2121 j = 0;
2122 /* reta = 4-byte sliding window of
2123 * 0x00..(indices-1)(indices-1)00..etc. */
2124 reta = (reta << 8) | (j * 0x11);
2125 if ((i & 3) == 3)
2126 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2127 }
2128
2129 /* Fill out hash function seeds */
2130 for (i = 0; i < 10; i++)
2131 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2132
2133 if (hw->mac.type == ixgbe_mac_82598EB)
2134 mrqc |= IXGBE_MRQC_RSSEN;
2135 /* Perform hash on these packet types */
2136 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2137 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2138 | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
2139 | IXGBE_MRQC_RSS_FIELD_IPV6
2140 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
2141 | IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
2142 }
2143 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2144
2145 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2146
2147 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED ||
2148 adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
2149 /* Disable indicating checksum in descriptor, enables
2150 * RSS hash */
2151 rxcsum |= IXGBE_RXCSUM_PCSD;
2152 }
2153 if (!(rxcsum & IXGBE_RXCSUM_PCSD)) {
2154 /* Enable IPv4 payload checksum for UDP fragments
2155 * if PCSD is not set */
2156 rxcsum |= IXGBE_RXCSUM_IPPCSE;
2157 }
2158
2159 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2160
2161 if (hw->mac.type == ixgbe_mac_82599EB) {
2162 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2163 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
2164 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
2165 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2166 }
2167
2168 if (adapter->flags & IXGBE_FLAG2_RSC_ENABLED) {
2169 /* Enable 82599 HW-RSC */
2170 for (i = 0; i < adapter->num_rx_queues; i++) {
2171 j = adapter->rx_ring[i].reg_idx;
2172 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(j));
2173 rscctrl |= IXGBE_RSCCTL_RSCEN;
2174 /*
2175 * we must limit the number of descriptors so that the
2176 * total size of max desc * buf_len is not greater
2177 * than 65535
2178 */
2179 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
2180 #if (MAX_SKB_FRAGS > 16)
2181 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2182 #elif (MAX_SKB_FRAGS > 8)
2183 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2184 #elif (MAX_SKB_FRAGS > 4)
2185 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2186 #else
2187 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2188 #endif
2189 } else {
2190 if (rx_buf_len < IXGBE_RXBUFFER_4096)
2191 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2192 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
2193 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2194 else
2195 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2196 }
2197 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(j), rscctrl);
2198 }
2199 /* Disable RSC for ACK packets */
2200 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
2201 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
2202 }
2203 }
2204
2205 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2206 {
2207 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2208 struct ixgbe_hw *hw = &adapter->hw;
2209
2210 /* add VID to filter table */
2211 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, true);
2212 }
2213
2214 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2215 {
2216 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2217 struct ixgbe_hw *hw = &adapter->hw;
2218
2219 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2220 ixgbe_irq_disable(adapter);
2221
2222 vlan_group_set_device(adapter->vlgrp, vid, NULL);
2223
2224 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2225 ixgbe_irq_enable(adapter);
2226
2227 /* remove VID from filter table */
2228 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, false);
2229 }
2230
2231 static void ixgbe_vlan_rx_register(struct net_device *netdev,
2232 struct vlan_group *grp)
2233 {
2234 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2235 u32 ctrl;
2236 int i, j;
2237
2238 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2239 ixgbe_irq_disable(adapter);
2240 adapter->vlgrp = grp;
2241
2242 /*
2243 * For a DCB driver, always enable VLAN tag stripping so we can
2244 * still receive traffic from a DCB-enabled host even if we're
2245 * not in DCB mode.
2246 */
2247 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
2248 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2249 ctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2250 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
2251 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
2252 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
2253 ctrl |= IXGBE_VLNCTRL_VFE;
2254 /* enable VLAN tag insert/strip */
2255 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
2256 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
2257 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
2258 for (i = 0; i < adapter->num_rx_queues; i++) {
2259 j = adapter->rx_ring[i].reg_idx;
2260 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXDCTL(j));
2261 ctrl |= IXGBE_RXDCTL_VME;
2262 IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXDCTL(j), ctrl);
2263 }
2264 }
2265 ixgbe_vlan_rx_add_vid(netdev, 0);
2266
2267 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2268 ixgbe_irq_enable(adapter);
2269 }
2270
2271 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
2272 {
2273 ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2274
2275 if (adapter->vlgrp) {
2276 u16 vid;
2277 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2278 if (!vlan_group_get_device(adapter->vlgrp, vid))
2279 continue;
2280 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
2281 }
2282 }
2283 }
2284
2285 static u8 *ixgbe_addr_list_itr(struct ixgbe_hw *hw, u8 **mc_addr_ptr, u32 *vmdq)
2286 {
2287 struct dev_mc_list *mc_ptr;
2288 u8 *addr = *mc_addr_ptr;
2289 *vmdq = 0;
2290
2291 mc_ptr = container_of(addr, struct dev_mc_list, dmi_addr[0]);
2292 if (mc_ptr->next)
2293 *mc_addr_ptr = mc_ptr->next->dmi_addr;
2294 else
2295 *mc_addr_ptr = NULL;
2296
2297 return addr;
2298 }
2299
2300 /**
2301 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
2302 * @netdev: network interface device structure
2303 *
2304 * The set_rx_method entry point is called whenever the unicast/multicast
2305 * address list or the network interface flags are updated. This routine is
2306 * responsible for configuring the hardware for proper unicast, multicast and
2307 * promiscuous mode.
2308 **/
2309 static void ixgbe_set_rx_mode(struct net_device *netdev)
2310 {
2311 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2312 struct ixgbe_hw *hw = &adapter->hw;
2313 u32 fctrl, vlnctrl;
2314 u8 *addr_list = NULL;
2315 int addr_count = 0;
2316
2317 /* Check for Promiscuous and All Multicast modes */
2318
2319 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
2320 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2321
2322 if (netdev->flags & IFF_PROMISC) {
2323 hw->addr_ctrl.user_set_promisc = 1;
2324 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2325 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
2326 } else {
2327 if (netdev->flags & IFF_ALLMULTI) {
2328 fctrl |= IXGBE_FCTRL_MPE;
2329 fctrl &= ~IXGBE_FCTRL_UPE;
2330 } else {
2331 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2332 }
2333 vlnctrl |= IXGBE_VLNCTRL_VFE;
2334 hw->addr_ctrl.user_set_promisc = 0;
2335 }
2336
2337 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
2338 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2339
2340 /* reprogram secondary unicast list */
2341 hw->mac.ops.update_uc_addr_list(hw, &netdev->uc.list);
2342
2343 /* reprogram multicast list */
2344 addr_count = netdev->mc_count;
2345 if (addr_count)
2346 addr_list = netdev->mc_list->dmi_addr;
2347 hw->mac.ops.update_mc_addr_list(hw, addr_list, addr_count,
2348 ixgbe_addr_list_itr);
2349 }
2350
2351 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
2352 {
2353 int q_idx;
2354 struct ixgbe_q_vector *q_vector;
2355 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2356
2357 /* legacy and MSI only use one vector */
2358 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2359 q_vectors = 1;
2360
2361 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2362 struct napi_struct *napi;
2363 q_vector = adapter->q_vector[q_idx];
2364 napi = &q_vector->napi;
2365 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2366 if (!q_vector->rxr_count || !q_vector->txr_count) {
2367 if (q_vector->txr_count == 1)
2368 napi->poll = &ixgbe_clean_txonly;
2369 else if (q_vector->rxr_count == 1)
2370 napi->poll = &ixgbe_clean_rxonly;
2371 }
2372 }
2373
2374 napi_enable(napi);
2375 }
2376 }
2377
2378 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
2379 {
2380 int q_idx;
2381 struct ixgbe_q_vector *q_vector;
2382 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2383
2384 /* legacy and MSI only use one vector */
2385 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2386 q_vectors = 1;
2387
2388 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2389 q_vector = adapter->q_vector[q_idx];
2390 napi_disable(&q_vector->napi);
2391 }
2392 }
2393
2394 #ifdef CONFIG_IXGBE_DCB
2395 /*
2396 * ixgbe_configure_dcb - Configure DCB hardware
2397 * @adapter: ixgbe adapter struct
2398 *
2399 * This is called by the driver on open to configure the DCB hardware.
2400 * This is also called by the gennetlink interface when reconfiguring
2401 * the DCB state.
2402 */
2403 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
2404 {
2405 struct ixgbe_hw *hw = &adapter->hw;
2406 u32 txdctl, vlnctrl;
2407 int i, j;
2408
2409 ixgbe_dcb_check_config(&adapter->dcb_cfg);
2410 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_TX_CONFIG);
2411 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_RX_CONFIG);
2412
2413 /* reconfigure the hardware */
2414 ixgbe_dcb_hw_config(&adapter->hw, &adapter->dcb_cfg);
2415
2416 for (i = 0; i < adapter->num_tx_queues; i++) {
2417 j = adapter->tx_ring[i].reg_idx;
2418 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2419 /* PThresh workaround for Tx hang with DFP enabled. */
2420 txdctl |= 32;
2421 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2422 }
2423 /* Enable VLAN tag insert/strip */
2424 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2425 if (hw->mac.type == ixgbe_mac_82598EB) {
2426 vlnctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2427 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2428 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2429 } else if (hw->mac.type == ixgbe_mac_82599EB) {
2430 vlnctrl |= IXGBE_VLNCTRL_VFE;
2431 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2432 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2433 for (i = 0; i < adapter->num_rx_queues; i++) {
2434 j = adapter->rx_ring[i].reg_idx;
2435 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2436 vlnctrl |= IXGBE_RXDCTL_VME;
2437 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
2438 }
2439 }
2440 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
2441 }
2442
2443 #endif
2444 static void ixgbe_configure(struct ixgbe_adapter *adapter)
2445 {
2446 struct net_device *netdev = adapter->netdev;
2447 struct ixgbe_hw *hw = &adapter->hw;
2448 int i;
2449
2450 ixgbe_set_rx_mode(netdev);
2451
2452 ixgbe_restore_vlan(adapter);
2453 #ifdef CONFIG_IXGBE_DCB
2454 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2455 netif_set_gso_max_size(netdev, 32768);
2456 ixgbe_configure_dcb(adapter);
2457 } else {
2458 netif_set_gso_max_size(netdev, 65536);
2459 }
2460 #else
2461 netif_set_gso_max_size(netdev, 65536);
2462 #endif
2463
2464 #ifdef IXGBE_FCOE
2465 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
2466 ixgbe_configure_fcoe(adapter);
2467
2468 #endif /* IXGBE_FCOE */
2469 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2470 for (i = 0; i < adapter->num_tx_queues; i++)
2471 adapter->tx_ring[i].atr_sample_rate =
2472 adapter->atr_sample_rate;
2473 ixgbe_init_fdir_signature_82599(hw, adapter->fdir_pballoc);
2474 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
2475 ixgbe_init_fdir_perfect_82599(hw, adapter->fdir_pballoc);
2476 }
2477
2478 ixgbe_configure_tx(adapter);
2479 ixgbe_configure_rx(adapter);
2480 for (i = 0; i < adapter->num_rx_queues; i++)
2481 ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i],
2482 (adapter->rx_ring[i].count - 1));
2483 }
2484
2485 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
2486 {
2487 switch (hw->phy.type) {
2488 case ixgbe_phy_sfp_avago:
2489 case ixgbe_phy_sfp_ftl:
2490 case ixgbe_phy_sfp_intel:
2491 case ixgbe_phy_sfp_unknown:
2492 case ixgbe_phy_tw_tyco:
2493 case ixgbe_phy_tw_unknown:
2494 return true;
2495 default:
2496 return false;
2497 }
2498 }
2499
2500 /**
2501 * ixgbe_sfp_link_config - set up SFP+ link
2502 * @adapter: pointer to private adapter struct
2503 **/
2504 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
2505 {
2506 struct ixgbe_hw *hw = &adapter->hw;
2507
2508 if (hw->phy.multispeed_fiber) {
2509 /*
2510 * In multispeed fiber setups, the device may not have
2511 * had a physical connection when the driver loaded.
2512 * If that's the case, the initial link configuration
2513 * couldn't get the MAC into 10G or 1G mode, so we'll
2514 * never have a link status change interrupt fire.
2515 * We need to try and force an autonegotiation
2516 * session, then bring up link.
2517 */
2518 hw->mac.ops.setup_sfp(hw);
2519 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
2520 schedule_work(&adapter->multispeed_fiber_task);
2521 } else {
2522 /*
2523 * Direct Attach Cu and non-multispeed fiber modules
2524 * still need to be configured properly prior to
2525 * attempting link.
2526 */
2527 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_MOD_TASK))
2528 schedule_work(&adapter->sfp_config_module_task);
2529 }
2530 }
2531
2532 /**
2533 * ixgbe_non_sfp_link_config - set up non-SFP+ link
2534 * @hw: pointer to private hardware struct
2535 *
2536 * Returns 0 on success, negative on failure
2537 **/
2538 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
2539 {
2540 u32 autoneg;
2541 bool link_up = false;
2542 u32 ret = IXGBE_ERR_LINK_SETUP;
2543
2544 if (hw->mac.ops.check_link)
2545 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
2546
2547 if (ret)
2548 goto link_cfg_out;
2549
2550 if (hw->mac.ops.get_link_capabilities)
2551 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg,
2552 &hw->mac.autoneg);
2553 if (ret)
2554 goto link_cfg_out;
2555
2556 if (hw->mac.ops.setup_link_speed)
2557 ret = hw->mac.ops.setup_link_speed(hw, autoneg, true, link_up);
2558 link_cfg_out:
2559 return ret;
2560 }
2561
2562 #define IXGBE_MAX_RX_DESC_POLL 10
2563 static inline void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
2564 int rxr)
2565 {
2566 int j = adapter->rx_ring[rxr].reg_idx;
2567 int k;
2568
2569 for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) {
2570 if (IXGBE_READ_REG(&adapter->hw,
2571 IXGBE_RXDCTL(j)) & IXGBE_RXDCTL_ENABLE)
2572 break;
2573 else
2574 msleep(1);
2575 }
2576 if (k >= IXGBE_MAX_RX_DESC_POLL) {
2577 DPRINTK(DRV, ERR, "RXDCTL.ENABLE on Rx queue %d "
2578 "not set within the polling period\n", rxr);
2579 }
2580 ixgbe_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr],
2581 (adapter->rx_ring[rxr].count - 1));
2582 }
2583
2584 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
2585 {
2586 struct net_device *netdev = adapter->netdev;
2587 struct ixgbe_hw *hw = &adapter->hw;
2588 int i, j = 0;
2589 int num_rx_rings = adapter->num_rx_queues;
2590 int err;
2591 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2592 u32 txdctl, rxdctl, mhadd;
2593 u32 dmatxctl;
2594 u32 gpie;
2595
2596 ixgbe_get_hw_control(adapter);
2597
2598 if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) ||
2599 (adapter->flags & IXGBE_FLAG_MSI_ENABLED)) {
2600 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2601 gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
2602 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
2603 } else {
2604 /* MSI only */
2605 gpie = 0;
2606 }
2607 /* XXX: to interrupt immediately for EICS writes, enable this */
2608 /* gpie |= IXGBE_GPIE_EIMEN; */
2609 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2610 }
2611
2612 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
2613 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
2614 * specifically only auto mask tx and rx interrupts */
2615 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
2616 }
2617
2618 /* Enable fan failure interrupt if media type is copper */
2619 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2620 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2621 gpie |= IXGBE_SDP1_GPIEN;
2622 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2623 }
2624
2625 if (hw->mac.type == ixgbe_mac_82599EB) {
2626 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2627 gpie |= IXGBE_SDP1_GPIEN;
2628 gpie |= IXGBE_SDP2_GPIEN;
2629 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2630 }
2631
2632 #ifdef IXGBE_FCOE
2633 /* adjust max frame to be able to do baby jumbo for FCoE */
2634 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
2635 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
2636 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
2637
2638 #endif /* IXGBE_FCOE */
2639 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
2640 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
2641 mhadd &= ~IXGBE_MHADD_MFS_MASK;
2642 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
2643
2644 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
2645 }
2646
2647 for (i = 0; i < adapter->num_tx_queues; i++) {
2648 j = adapter->tx_ring[i].reg_idx;
2649 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2650 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
2651 txdctl |= (8 << 16);
2652 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2653 }
2654
2655 if (hw->mac.type == ixgbe_mac_82599EB) {
2656 /* DMATXCTL.EN must be set after all Tx queue config is done */
2657 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2658 dmatxctl |= IXGBE_DMATXCTL_TE;
2659 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2660 }
2661 for (i = 0; i < adapter->num_tx_queues; i++) {
2662 j = adapter->tx_ring[i].reg_idx;
2663 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2664 txdctl |= IXGBE_TXDCTL_ENABLE;
2665 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2666 }
2667
2668 for (i = 0; i < num_rx_rings; i++) {
2669 j = adapter->rx_ring[i].reg_idx;
2670 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2671 /* enable PTHRESH=32 descriptors (half the internal cache)
2672 * and HTHRESH=0 descriptors (to minimize latency on fetch),
2673 * this also removes a pesky rx_no_buffer_count increment */
2674 rxdctl |= 0x0020;
2675 rxdctl |= IXGBE_RXDCTL_ENABLE;
2676 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), rxdctl);
2677 if (hw->mac.type == ixgbe_mac_82599EB)
2678 ixgbe_rx_desc_queue_enable(adapter, i);
2679 }
2680 /* enable all receives */
2681 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2682 if (hw->mac.type == ixgbe_mac_82598EB)
2683 rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
2684 else
2685 rxdctl |= IXGBE_RXCTRL_RXEN;
2686 hw->mac.ops.enable_rx_dma(hw, rxdctl);
2687
2688 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2689 ixgbe_configure_msix(adapter);
2690 else
2691 ixgbe_configure_msi_and_legacy(adapter);
2692
2693 clear_bit(__IXGBE_DOWN, &adapter->state);
2694 ixgbe_napi_enable_all(adapter);
2695
2696 /* clear any pending interrupts, may auto mask */
2697 IXGBE_READ_REG(hw, IXGBE_EICR);
2698
2699 ixgbe_irq_enable(adapter);
2700
2701 /*
2702 * If this adapter has a fan, check to see if we had a failure
2703 * before we enabled the interrupt.
2704 */
2705 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2706 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
2707 if (esdp & IXGBE_ESDP_SDP1)
2708 DPRINTK(DRV, CRIT,
2709 "Fan has stopped, replace the adapter\n");
2710 }
2711
2712 /*
2713 * For hot-pluggable SFP+ devices, a new SFP+ module may have
2714 * arrived before interrupts were enabled but after probe. Such
2715 * devices wouldn't have their type identified yet. We need to
2716 * kick off the SFP+ module setup first, then try to bring up link.
2717 * If we're not hot-pluggable SFP+, we just need to configure link
2718 * and bring it up.
2719 */
2720 if (hw->phy.type == ixgbe_phy_unknown) {
2721 err = hw->phy.ops.identify(hw);
2722 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
2723 /*
2724 * Take the device down and schedule the sfp tasklet
2725 * which will unregister_netdev and log it.
2726 */
2727 ixgbe_down(adapter);
2728 schedule_work(&adapter->sfp_config_module_task);
2729 return err;
2730 }
2731 }
2732
2733 if (ixgbe_is_sfp(hw)) {
2734 ixgbe_sfp_link_config(adapter);
2735 } else {
2736 err = ixgbe_non_sfp_link_config(hw);
2737 if (err)
2738 DPRINTK(PROBE, ERR, "link_config FAILED %d\n", err);
2739 }
2740
2741 for (i = 0; i < adapter->num_tx_queues; i++)
2742 set_bit(__IXGBE_FDIR_INIT_DONE,
2743 &(adapter->tx_ring[i].reinit_state));
2744
2745 /* enable transmits */
2746 netif_tx_start_all_queues(netdev);
2747
2748 /* bring the link up in the watchdog, this could race with our first
2749 * link up interrupt but shouldn't be a problem */
2750 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2751 adapter->link_check_timeout = jiffies;
2752 mod_timer(&adapter->watchdog_timer, jiffies);
2753 return 0;
2754 }
2755
2756 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
2757 {
2758 WARN_ON(in_interrupt());
2759 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
2760 msleep(1);
2761 ixgbe_down(adapter);
2762 ixgbe_up(adapter);
2763 clear_bit(__IXGBE_RESETTING, &adapter->state);
2764 }
2765
2766 int ixgbe_up(struct ixgbe_adapter *adapter)
2767 {
2768 /* hardware has been reset, we need to reload some things */
2769 ixgbe_configure(adapter);
2770
2771 return ixgbe_up_complete(adapter);
2772 }
2773
2774 void ixgbe_reset(struct ixgbe_adapter *adapter)
2775 {
2776 struct ixgbe_hw *hw = &adapter->hw;
2777 int err;
2778
2779 err = hw->mac.ops.init_hw(hw);
2780 switch (err) {
2781 case 0:
2782 case IXGBE_ERR_SFP_NOT_PRESENT:
2783 break;
2784 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
2785 dev_err(&adapter->pdev->dev, "master disable timed out\n");
2786 break;
2787 case IXGBE_ERR_EEPROM_VERSION:
2788 /* We are running on a pre-production device, log a warning */
2789 dev_warn(&adapter->pdev->dev, "This device is a pre-production "
2790 "adapter/LOM. Please be aware there may be issues "
2791 "associated with your hardware. If you are "
2792 "experiencing problems please contact your Intel or "
2793 "hardware representative who provided you with this "
2794 "hardware.\n");
2795 break;
2796 default:
2797 dev_err(&adapter->pdev->dev, "Hardware Error: %d\n", err);
2798 }
2799
2800 /* reprogram the RAR[0] in case user changed it. */
2801 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
2802 }
2803
2804 /**
2805 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
2806 * @adapter: board private structure
2807 * @rx_ring: ring to free buffers from
2808 **/
2809 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
2810 struct ixgbe_ring *rx_ring)
2811 {
2812 struct pci_dev *pdev = adapter->pdev;
2813 unsigned long size;
2814 unsigned int i;
2815
2816 /* Free all the Rx ring sk_buffs */
2817
2818 for (i = 0; i < rx_ring->count; i++) {
2819 struct ixgbe_rx_buffer *rx_buffer_info;
2820
2821 rx_buffer_info = &rx_ring->rx_buffer_info[i];
2822 if (rx_buffer_info->dma) {
2823 pci_unmap_single(pdev, rx_buffer_info->dma,
2824 rx_ring->rx_buf_len,
2825 PCI_DMA_FROMDEVICE);
2826 rx_buffer_info->dma = 0;
2827 }
2828 if (rx_buffer_info->skb) {
2829 struct sk_buff *skb = rx_buffer_info->skb;
2830 rx_buffer_info->skb = NULL;
2831 do {
2832 struct sk_buff *this = skb;
2833 skb = skb->prev;
2834 dev_kfree_skb(this);
2835 } while (skb);
2836 }
2837 if (!rx_buffer_info->page)
2838 continue;
2839 if (rx_buffer_info->page_dma) {
2840 pci_unmap_page(pdev, rx_buffer_info->page_dma,
2841 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
2842 rx_buffer_info->page_dma = 0;
2843 }
2844 put_page(rx_buffer_info->page);
2845 rx_buffer_info->page = NULL;
2846 rx_buffer_info->page_offset = 0;
2847 }
2848
2849 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
2850 memset(rx_ring->rx_buffer_info, 0, size);
2851
2852 /* Zero out the descriptor ring */
2853 memset(rx_ring->desc, 0, rx_ring->size);
2854
2855 rx_ring->next_to_clean = 0;
2856 rx_ring->next_to_use = 0;
2857
2858 if (rx_ring->head)
2859 writel(0, adapter->hw.hw_addr + rx_ring->head);
2860 if (rx_ring->tail)
2861 writel(0, adapter->hw.hw_addr + rx_ring->tail);
2862 }
2863
2864 /**
2865 * ixgbe_clean_tx_ring - Free Tx Buffers
2866 * @adapter: board private structure
2867 * @tx_ring: ring to be cleaned
2868 **/
2869 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
2870 struct ixgbe_ring *tx_ring)
2871 {
2872 struct ixgbe_tx_buffer *tx_buffer_info;
2873 unsigned long size;
2874 unsigned int i;
2875
2876 /* Free all the Tx ring sk_buffs */
2877
2878 for (i = 0; i < tx_ring->count; i++) {
2879 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2880 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
2881 }
2882
2883 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
2884 memset(tx_ring->tx_buffer_info, 0, size);
2885
2886 /* Zero out the descriptor ring */
2887 memset(tx_ring->desc, 0, tx_ring->size);
2888
2889 tx_ring->next_to_use = 0;
2890 tx_ring->next_to_clean = 0;
2891
2892 if (tx_ring->head)
2893 writel(0, adapter->hw.hw_addr + tx_ring->head);
2894 if (tx_ring->tail)
2895 writel(0, adapter->hw.hw_addr + tx_ring->tail);
2896 }
2897
2898 /**
2899 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
2900 * @adapter: board private structure
2901 **/
2902 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
2903 {
2904 int i;
2905
2906 for (i = 0; i < adapter->num_rx_queues; i++)
2907 ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2908 }
2909
2910 /**
2911 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
2912 * @adapter: board private structure
2913 **/
2914 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
2915 {
2916 int i;
2917
2918 for (i = 0; i < adapter->num_tx_queues; i++)
2919 ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2920 }
2921
2922 void ixgbe_down(struct ixgbe_adapter *adapter)
2923 {
2924 struct net_device *netdev = adapter->netdev;
2925 struct ixgbe_hw *hw = &adapter->hw;
2926 u32 rxctrl;
2927 u32 txdctl;
2928 int i, j;
2929
2930 /* signal that we are down to the interrupt handler */
2931 set_bit(__IXGBE_DOWN, &adapter->state);
2932
2933 /* disable receives */
2934 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2935 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2936
2937 netif_tx_disable(netdev);
2938
2939 IXGBE_WRITE_FLUSH(hw);
2940 msleep(10);
2941
2942 netif_tx_stop_all_queues(netdev);
2943
2944 ixgbe_irq_disable(adapter);
2945
2946 ixgbe_napi_disable_all(adapter);
2947
2948 del_timer_sync(&adapter->watchdog_timer);
2949 cancel_work_sync(&adapter->watchdog_task);
2950
2951 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
2952 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
2953 cancel_work_sync(&adapter->fdir_reinit_task);
2954
2955 /* disable transmits in the hardware now that interrupts are off */
2956 for (i = 0; i < adapter->num_tx_queues; i++) {
2957 j = adapter->tx_ring[i].reg_idx;
2958 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2959 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
2960 (txdctl & ~IXGBE_TXDCTL_ENABLE));
2961 }
2962 /* Disable the Tx DMA engine on 82599 */
2963 if (hw->mac.type == ixgbe_mac_82599EB)
2964 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
2965 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
2966 ~IXGBE_DMATXCTL_TE));
2967
2968 netif_carrier_off(netdev);
2969
2970 if (!pci_channel_offline(adapter->pdev))
2971 ixgbe_reset(adapter);
2972 ixgbe_clean_all_tx_rings(adapter);
2973 ixgbe_clean_all_rx_rings(adapter);
2974
2975 #ifdef CONFIG_IXGBE_DCA
2976 /* since we reset the hardware DCA settings were cleared */
2977 ixgbe_setup_dca(adapter);
2978 #endif
2979 }
2980
2981 /**
2982 * ixgbe_poll - NAPI Rx polling callback
2983 * @napi: structure for representing this polling device
2984 * @budget: how many packets driver is allowed to clean
2985 *
2986 * This function is used for legacy and MSI, NAPI mode
2987 **/
2988 static int ixgbe_poll(struct napi_struct *napi, int budget)
2989 {
2990 struct ixgbe_q_vector *q_vector =
2991 container_of(napi, struct ixgbe_q_vector, napi);
2992 struct ixgbe_adapter *adapter = q_vector->adapter;
2993 int tx_clean_complete, work_done = 0;
2994
2995 #ifdef CONFIG_IXGBE_DCA
2996 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
2997 ixgbe_update_tx_dca(adapter, adapter->tx_ring);
2998 ixgbe_update_rx_dca(adapter, adapter->rx_ring);
2999 }
3000 #endif
3001
3002 tx_clean_complete = ixgbe_clean_tx_irq(q_vector, adapter->tx_ring);
3003 ixgbe_clean_rx_irq(q_vector, adapter->rx_ring, &work_done, budget);
3004
3005 if (!tx_clean_complete)
3006 work_done = budget;
3007
3008 /* If budget not fully consumed, exit the polling mode */
3009 if (work_done < budget) {
3010 napi_complete(napi);
3011 if (adapter->itr_setting & 1)
3012 ixgbe_set_itr(adapter);
3013 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3014 ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
3015 }
3016 return work_done;
3017 }
3018
3019 /**
3020 * ixgbe_tx_timeout - Respond to a Tx Hang
3021 * @netdev: network interface device structure
3022 **/
3023 static void ixgbe_tx_timeout(struct net_device *netdev)
3024 {
3025 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3026
3027 /* Do the reset outside of interrupt context */
3028 schedule_work(&adapter->reset_task);
3029 }
3030
3031 static void ixgbe_reset_task(struct work_struct *work)
3032 {
3033 struct ixgbe_adapter *adapter;
3034 adapter = container_of(work, struct ixgbe_adapter, reset_task);
3035
3036 /* If we're already down or resetting, just bail */
3037 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
3038 test_bit(__IXGBE_RESETTING, &adapter->state))
3039 return;
3040
3041 adapter->tx_timeout_count++;
3042
3043 ixgbe_reinit_locked(adapter);
3044 }
3045
3046 #ifdef CONFIG_IXGBE_DCB
3047 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
3048 {
3049 bool ret = false;
3050 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_DCB];
3051
3052 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
3053 return ret;
3054
3055 f->mask = 0x7 << 3;
3056 adapter->num_rx_queues = f->indices;
3057 adapter->num_tx_queues = f->indices;
3058 ret = true;
3059
3060 return ret;
3061 }
3062 #endif
3063
3064 /**
3065 * ixgbe_set_rss_queues: Allocate queues for RSS
3066 * @adapter: board private structure to initialize
3067 *
3068 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
3069 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
3070 *
3071 **/
3072 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
3073 {
3074 bool ret = false;
3075 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
3076
3077 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3078 f->mask = 0xF;
3079 adapter->num_rx_queues = f->indices;
3080 adapter->num_tx_queues = f->indices;
3081 ret = true;
3082 } else {
3083 ret = false;
3084 }
3085
3086 return ret;
3087 }
3088
3089 /**
3090 * ixgbe_set_fdir_queues: Allocate queues for Flow Director
3091 * @adapter: board private structure to initialize
3092 *
3093 * Flow Director is an advanced Rx filter, attempting to get Rx flows back
3094 * to the original CPU that initiated the Tx session. This runs in addition
3095 * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
3096 * Rx load across CPUs using RSS.
3097 *
3098 **/
3099 static bool inline ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
3100 {
3101 bool ret = false;
3102 struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
3103
3104 f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
3105 f_fdir->mask = 0;
3106
3107 /* Flow Director must have RSS enabled */
3108 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3109 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3110 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)))) {
3111 adapter->num_tx_queues = f_fdir->indices;
3112 adapter->num_rx_queues = f_fdir->indices;
3113 ret = true;
3114 } else {
3115 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3116 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3117 }
3118 return ret;
3119 }
3120
3121 #ifdef IXGBE_FCOE
3122 /**
3123 * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
3124 * @adapter: board private structure to initialize
3125 *
3126 * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
3127 * The ring feature mask is not used as a mask for FCoE, as it can take any 8
3128 * rx queues out of the max number of rx queues, instead, it is used as the
3129 * index of the first rx queue used by FCoE.
3130 *
3131 **/
3132 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
3133 {
3134 bool ret = false;
3135 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3136
3137 f->indices = min((int)num_online_cpus(), f->indices);
3138 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3139 #ifdef CONFIG_IXGBE_DCB
3140 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3141 DPRINTK(PROBE, INFO, "FCOE enabled with DCB \n");
3142 ixgbe_set_dcb_queues(adapter);
3143 }
3144 #endif
3145 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3146 DPRINTK(PROBE, INFO, "FCOE enabled with RSS \n");
3147 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3148 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3149 ixgbe_set_fdir_queues(adapter);
3150 else
3151 ixgbe_set_rss_queues(adapter);
3152 }
3153 /* adding FCoE rx rings to the end */
3154 f->mask = adapter->num_rx_queues;
3155 adapter->num_rx_queues += f->indices;
3156 if (adapter->num_tx_queues == 0)
3157 adapter->num_tx_queues = f->indices;
3158
3159 ret = true;
3160 }
3161
3162 return ret;
3163 }
3164
3165 #endif /* IXGBE_FCOE */
3166 /*
3167 * ixgbe_set_num_queues: Allocate queues for device, feature dependant
3168 * @adapter: board private structure to initialize
3169 *
3170 * This is the top level queue allocation routine. The order here is very
3171 * important, starting with the "most" number of features turned on at once,
3172 * and ending with the smallest set of features. This way large combinations
3173 * can be allocated if they're turned on, and smaller combinations are the
3174 * fallthrough conditions.
3175 *
3176 **/
3177 static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
3178 {
3179 #ifdef IXGBE_FCOE
3180 if (ixgbe_set_fcoe_queues(adapter))
3181 goto done;
3182
3183 #endif /* IXGBE_FCOE */
3184 #ifdef CONFIG_IXGBE_DCB
3185 if (ixgbe_set_dcb_queues(adapter))
3186 goto done;
3187
3188 #endif
3189 if (ixgbe_set_fdir_queues(adapter))
3190 goto done;
3191
3192 if (ixgbe_set_rss_queues(adapter))
3193 goto done;
3194
3195 /* fallback to base case */
3196 adapter->num_rx_queues = 1;
3197 adapter->num_tx_queues = 1;
3198
3199 done:
3200 /* Notify the stack of the (possibly) reduced Tx Queue count. */
3201 adapter->netdev->real_num_tx_queues = adapter->num_tx_queues;
3202 }
3203
3204 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
3205 int vectors)
3206 {
3207 int err, vector_threshold;
3208
3209 /* We'll want at least 3 (vector_threshold):
3210 * 1) TxQ[0] Cleanup
3211 * 2) RxQ[0] Cleanup
3212 * 3) Other (Link Status Change, etc.)
3213 * 4) TCP Timer (optional)
3214 */
3215 vector_threshold = MIN_MSIX_COUNT;
3216
3217 /* The more we get, the more we will assign to Tx/Rx Cleanup
3218 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
3219 * Right now, we simply care about how many we'll get; we'll
3220 * set them up later while requesting irq's.
3221 */
3222 while (vectors >= vector_threshold) {
3223 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
3224 vectors);
3225 if (!err) /* Success in acquiring all requested vectors. */
3226 break;
3227 else if (err < 0)
3228 vectors = 0; /* Nasty failure, quit now */
3229 else /* err == number of vectors we should try again with */
3230 vectors = err;
3231 }
3232
3233 if (vectors < vector_threshold) {
3234 /* Can't allocate enough MSI-X interrupts? Oh well.
3235 * This just means we'll go with either a single MSI
3236 * vector or fall back to legacy interrupts.
3237 */
3238 DPRINTK(HW, DEBUG, "Unable to allocate MSI-X interrupts\n");
3239 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3240 kfree(adapter->msix_entries);
3241 adapter->msix_entries = NULL;
3242 } else {
3243 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
3244 /*
3245 * Adjust for only the vectors we'll use, which is minimum
3246 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
3247 * vectors we were allocated.
3248 */
3249 adapter->num_msix_vectors = min(vectors,
3250 adapter->max_msix_q_vectors + NON_Q_VECTORS);
3251 }
3252 }
3253
3254 /**
3255 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
3256 * @adapter: board private structure to initialize
3257 *
3258 * Cache the descriptor ring offsets for RSS to the assigned rings.
3259 *
3260 **/
3261 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
3262 {
3263 int i;
3264 bool ret = false;
3265
3266 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3267 for (i = 0; i < adapter->num_rx_queues; i++)
3268 adapter->rx_ring[i].reg_idx = i;
3269 for (i = 0; i < adapter->num_tx_queues; i++)
3270 adapter->tx_ring[i].reg_idx = i;
3271 ret = true;
3272 } else {
3273 ret = false;
3274 }
3275
3276 return ret;
3277 }
3278
3279 #ifdef CONFIG_IXGBE_DCB
3280 /**
3281 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
3282 * @adapter: board private structure to initialize
3283 *
3284 * Cache the descriptor ring offsets for DCB to the assigned rings.
3285 *
3286 **/
3287 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
3288 {
3289 int i;
3290 bool ret = false;
3291 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
3292
3293 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3294 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
3295 /* the number of queues is assumed to be symmetric */
3296 for (i = 0; i < dcb_i; i++) {
3297 adapter->rx_ring[i].reg_idx = i << 3;
3298 adapter->tx_ring[i].reg_idx = i << 2;
3299 }
3300 ret = true;
3301 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
3302 if (dcb_i == 8) {
3303 /*
3304 * Tx TC0 starts at: descriptor queue 0
3305 * Tx TC1 starts at: descriptor queue 32
3306 * Tx TC2 starts at: descriptor queue 64
3307 * Tx TC3 starts at: descriptor queue 80
3308 * Tx TC4 starts at: descriptor queue 96
3309 * Tx TC5 starts at: descriptor queue 104
3310 * Tx TC6 starts at: descriptor queue 112
3311 * Tx TC7 starts at: descriptor queue 120
3312 *
3313 * Rx TC0-TC7 are offset by 16 queues each
3314 */
3315 for (i = 0; i < 3; i++) {
3316 adapter->tx_ring[i].reg_idx = i << 5;
3317 adapter->rx_ring[i].reg_idx = i << 4;
3318 }
3319 for ( ; i < 5; i++) {
3320 adapter->tx_ring[i].reg_idx =
3321 ((i + 2) << 4);
3322 adapter->rx_ring[i].reg_idx = i << 4;
3323 }
3324 for ( ; i < dcb_i; i++) {
3325 adapter->tx_ring[i].reg_idx =
3326 ((i + 8) << 3);
3327 adapter->rx_ring[i].reg_idx = i << 4;
3328 }
3329
3330 ret = true;
3331 } else if (dcb_i == 4) {
3332 /*
3333 * Tx TC0 starts at: descriptor queue 0
3334 * Tx TC1 starts at: descriptor queue 64
3335 * Tx TC2 starts at: descriptor queue 96
3336 * Tx TC3 starts at: descriptor queue 112
3337 *
3338 * Rx TC0-TC3 are offset by 32 queues each
3339 */
3340 adapter->tx_ring[0].reg_idx = 0;
3341 adapter->tx_ring[1].reg_idx = 64;
3342 adapter->tx_ring[2].reg_idx = 96;
3343 adapter->tx_ring[3].reg_idx = 112;
3344 for (i = 0 ; i < dcb_i; i++)
3345 adapter->rx_ring[i].reg_idx = i << 5;
3346
3347 ret = true;
3348 } else {
3349 ret = false;
3350 }
3351 } else {
3352 ret = false;
3353 }
3354 } else {
3355 ret = false;
3356 }
3357
3358 return ret;
3359 }
3360 #endif
3361
3362 /**
3363 * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
3364 * @adapter: board private structure to initialize
3365 *
3366 * Cache the descriptor ring offsets for Flow Director to the assigned rings.
3367 *
3368 **/
3369 static bool inline ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
3370 {
3371 int i;
3372 bool ret = false;
3373
3374 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3375 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3376 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))) {
3377 for (i = 0; i < adapter->num_rx_queues; i++)
3378 adapter->rx_ring[i].reg_idx = i;
3379 for (i = 0; i < adapter->num_tx_queues; i++)
3380 adapter->tx_ring[i].reg_idx = i;
3381 ret = true;
3382 }
3383
3384 return ret;
3385 }
3386
3387 #ifdef IXGBE_FCOE
3388 /**
3389 * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
3390 * @adapter: board private structure to initialize
3391 *
3392 * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
3393 *
3394 */
3395 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
3396 {
3397 int i, fcoe_i = 0;
3398 bool ret = false;
3399 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3400
3401 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3402 #ifdef CONFIG_IXGBE_DCB
3403 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3404 ixgbe_cache_ring_dcb(adapter);
3405 fcoe_i = adapter->rx_ring[0].reg_idx + 1;
3406 }
3407 #endif /* CONFIG_IXGBE_DCB */
3408 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3409 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3410 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3411 ixgbe_cache_ring_fdir(adapter);
3412 else
3413 ixgbe_cache_ring_rss(adapter);
3414
3415 fcoe_i = f->mask;
3416 }
3417 for (i = 0; i < f->indices; i++, fcoe_i++)
3418 adapter->rx_ring[f->mask + i].reg_idx = fcoe_i;
3419 ret = true;
3420 }
3421 return ret;
3422 }
3423
3424 #endif /* IXGBE_FCOE */
3425 /**
3426 * ixgbe_cache_ring_register - Descriptor ring to register mapping
3427 * @adapter: board private structure to initialize
3428 *
3429 * Once we know the feature-set enabled for the device, we'll cache
3430 * the register offset the descriptor ring is assigned to.
3431 *
3432 * Note, the order the various feature calls is important. It must start with
3433 * the "most" features enabled at the same time, then trickle down to the
3434 * least amount of features turned on at once.
3435 **/
3436 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
3437 {
3438 /* start with default case */
3439 adapter->rx_ring[0].reg_idx = 0;
3440 adapter->tx_ring[0].reg_idx = 0;
3441
3442 #ifdef IXGBE_FCOE
3443 if (ixgbe_cache_ring_fcoe(adapter))
3444 return;
3445
3446 #endif /* IXGBE_FCOE */
3447 #ifdef CONFIG_IXGBE_DCB
3448 if (ixgbe_cache_ring_dcb(adapter))
3449 return;
3450
3451 #endif
3452 if (ixgbe_cache_ring_fdir(adapter))
3453 return;
3454
3455 if (ixgbe_cache_ring_rss(adapter))
3456 return;
3457 }
3458
3459 /**
3460 * ixgbe_alloc_queues - Allocate memory for all rings
3461 * @adapter: board private structure to initialize
3462 *
3463 * We allocate one ring per queue at run-time since we don't know the
3464 * number of queues at compile-time. The polling_netdev array is
3465 * intended for Multiqueue, but should work fine with a single queue.
3466 **/
3467 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
3468 {
3469 int i;
3470
3471 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
3472 sizeof(struct ixgbe_ring), GFP_KERNEL);
3473 if (!adapter->tx_ring)
3474 goto err_tx_ring_allocation;
3475
3476 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
3477 sizeof(struct ixgbe_ring), GFP_KERNEL);
3478 if (!adapter->rx_ring)
3479 goto err_rx_ring_allocation;
3480
3481 for (i = 0; i < adapter->num_tx_queues; i++) {
3482 adapter->tx_ring[i].count = adapter->tx_ring_count;
3483 adapter->tx_ring[i].queue_index = i;
3484 }
3485
3486 for (i = 0; i < adapter->num_rx_queues; i++) {
3487 adapter->rx_ring[i].count = adapter->rx_ring_count;
3488 adapter->rx_ring[i].queue_index = i;
3489 }
3490
3491 ixgbe_cache_ring_register(adapter);
3492
3493 return 0;
3494
3495 err_rx_ring_allocation:
3496 kfree(adapter->tx_ring);
3497 err_tx_ring_allocation:
3498 return -ENOMEM;
3499 }
3500
3501 /**
3502 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
3503 * @adapter: board private structure to initialize
3504 *
3505 * Attempt to configure the interrupts using the best available
3506 * capabilities of the hardware and the kernel.
3507 **/
3508 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
3509 {
3510 struct ixgbe_hw *hw = &adapter->hw;
3511 int err = 0;
3512 int vector, v_budget;
3513
3514 /*
3515 * It's easy to be greedy for MSI-X vectors, but it really
3516 * doesn't do us much good if we have a lot more vectors
3517 * than CPU's. So let's be conservative and only ask for
3518 * (roughly) twice the number of vectors as there are CPU's.
3519 */
3520 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
3521 (int)(num_online_cpus() * 2)) + NON_Q_VECTORS;
3522
3523 /*
3524 * At the same time, hardware can only support a maximum of
3525 * hw.mac->max_msix_vectors vectors. With features
3526 * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
3527 * descriptor queues supported by our device. Thus, we cap it off in
3528 * those rare cases where the cpu count also exceeds our vector limit.
3529 */
3530 v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
3531
3532 /* A failure in MSI-X entry allocation isn't fatal, but it does
3533 * mean we disable MSI-X capabilities of the adapter. */
3534 adapter->msix_entries = kcalloc(v_budget,
3535 sizeof(struct msix_entry), GFP_KERNEL);
3536 if (adapter->msix_entries) {
3537 for (vector = 0; vector < v_budget; vector++)
3538 adapter->msix_entries[vector].entry = vector;
3539
3540 ixgbe_acquire_msix_vectors(adapter, v_budget);
3541
3542 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3543 goto out;
3544 }
3545
3546 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
3547 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
3548 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3549 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3550 adapter->atr_sample_rate = 0;
3551 ixgbe_set_num_queues(adapter);
3552
3553 err = pci_enable_msi(adapter->pdev);
3554 if (!err) {
3555 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
3556 } else {
3557 DPRINTK(HW, DEBUG, "Unable to allocate MSI interrupt, "
3558 "falling back to legacy. Error: %d\n", err);
3559 /* reset err */
3560 err = 0;
3561 }
3562
3563 out:
3564 return err;
3565 }
3566
3567 /**
3568 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
3569 * @adapter: board private structure to initialize
3570 *
3571 * We allocate one q_vector per queue interrupt. If allocation fails we
3572 * return -ENOMEM.
3573 **/
3574 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
3575 {
3576 int q_idx, num_q_vectors;
3577 struct ixgbe_q_vector *q_vector;
3578 int napi_vectors;
3579 int (*poll)(struct napi_struct *, int);
3580
3581 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3582 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3583 napi_vectors = adapter->num_rx_queues;
3584 poll = &ixgbe_clean_rxtx_many;
3585 } else {
3586 num_q_vectors = 1;
3587 napi_vectors = 1;
3588 poll = &ixgbe_poll;
3589 }
3590
3591 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3592 q_vector = kzalloc(sizeof(struct ixgbe_q_vector), GFP_KERNEL);
3593 if (!q_vector)
3594 goto err_out;
3595 q_vector->adapter = adapter;
3596 q_vector->eitr = adapter->eitr_param;
3597 q_vector->v_idx = q_idx;
3598 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
3599 adapter->q_vector[q_idx] = q_vector;
3600 }
3601
3602 return 0;
3603
3604 err_out:
3605 while (q_idx) {
3606 q_idx--;
3607 q_vector = adapter->q_vector[q_idx];
3608 netif_napi_del(&q_vector->napi);
3609 kfree(q_vector);
3610 adapter->q_vector[q_idx] = NULL;
3611 }
3612 return -ENOMEM;
3613 }
3614
3615 /**
3616 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
3617 * @adapter: board private structure to initialize
3618 *
3619 * This function frees the memory allocated to the q_vectors. In addition if
3620 * NAPI is enabled it will delete any references to the NAPI struct prior
3621 * to freeing the q_vector.
3622 **/
3623 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
3624 {
3625 int q_idx, num_q_vectors;
3626
3627 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3628 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3629 else
3630 num_q_vectors = 1;
3631
3632 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3633 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
3634 adapter->q_vector[q_idx] = NULL;
3635 netif_napi_del(&q_vector->napi);
3636 kfree(q_vector);
3637 }
3638 }
3639
3640 void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
3641 {
3642 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3643 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3644 pci_disable_msix(adapter->pdev);
3645 kfree(adapter->msix_entries);
3646 adapter->msix_entries = NULL;
3647 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
3648 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
3649 pci_disable_msi(adapter->pdev);
3650 }
3651 return;
3652 }
3653
3654 /**
3655 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
3656 * @adapter: board private structure to initialize
3657 *
3658 * We determine which interrupt scheme to use based on...
3659 * - Kernel support (MSI, MSI-X)
3660 * - which can be user-defined (via MODULE_PARAM)
3661 * - Hardware queue count (num_*_queues)
3662 * - defined by miscellaneous hardware support/features (RSS, etc.)
3663 **/
3664 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
3665 {
3666 int err;
3667
3668 /* Number of supported queues */
3669 ixgbe_set_num_queues(adapter);
3670
3671 err = ixgbe_set_interrupt_capability(adapter);
3672 if (err) {
3673 DPRINTK(PROBE, ERR, "Unable to setup interrupt capabilities\n");
3674 goto err_set_interrupt;
3675 }
3676
3677 err = ixgbe_alloc_q_vectors(adapter);
3678 if (err) {
3679 DPRINTK(PROBE, ERR, "Unable to allocate memory for queue "
3680 "vectors\n");
3681 goto err_alloc_q_vectors;
3682 }
3683
3684 err = ixgbe_alloc_queues(adapter);
3685 if (err) {
3686 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
3687 goto err_alloc_queues;
3688 }
3689
3690 DPRINTK(DRV, INFO, "Multiqueue %s: Rx Queue count = %u, "
3691 "Tx Queue count = %u\n",
3692 (adapter->num_rx_queues > 1) ? "Enabled" :
3693 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
3694
3695 set_bit(__IXGBE_DOWN, &adapter->state);
3696
3697 return 0;
3698
3699 err_alloc_queues:
3700 ixgbe_free_q_vectors(adapter);
3701 err_alloc_q_vectors:
3702 ixgbe_reset_interrupt_capability(adapter);
3703 err_set_interrupt:
3704 return err;
3705 }
3706
3707 /**
3708 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
3709 * @adapter: board private structure to clear interrupt scheme on
3710 *
3711 * We go through and clear interrupt specific resources and reset the structure
3712 * to pre-load conditions
3713 **/
3714 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
3715 {
3716 kfree(adapter->tx_ring);
3717 kfree(adapter->rx_ring);
3718 adapter->tx_ring = NULL;
3719 adapter->rx_ring = NULL;
3720
3721 ixgbe_free_q_vectors(adapter);
3722 ixgbe_reset_interrupt_capability(adapter);
3723 }
3724
3725 /**
3726 * ixgbe_sfp_timer - worker thread to find a missing module
3727 * @data: pointer to our adapter struct
3728 **/
3729 static void ixgbe_sfp_timer(unsigned long data)
3730 {
3731 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
3732
3733 /*
3734 * Do the sfp_timer outside of interrupt context due to the
3735 * delays that sfp+ detection requires
3736 */
3737 schedule_work(&adapter->sfp_task);
3738 }
3739
3740 /**
3741 * ixgbe_sfp_task - worker thread to find a missing module
3742 * @work: pointer to work_struct containing our data
3743 **/
3744 static void ixgbe_sfp_task(struct work_struct *work)
3745 {
3746 struct ixgbe_adapter *adapter = container_of(work,
3747 struct ixgbe_adapter,
3748 sfp_task);
3749 struct ixgbe_hw *hw = &adapter->hw;
3750
3751 if ((hw->phy.type == ixgbe_phy_nl) &&
3752 (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
3753 s32 ret = hw->phy.ops.identify_sfp(hw);
3754 if (ret == IXGBE_ERR_SFP_NOT_PRESENT)
3755 goto reschedule;
3756 ret = hw->phy.ops.reset(hw);
3757 if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
3758 dev_err(&adapter->pdev->dev, "failed to initialize "
3759 "because an unsupported SFP+ module type "
3760 "was detected.\n"
3761 "Reload the driver after installing a "
3762 "supported module.\n");
3763 unregister_netdev(adapter->netdev);
3764 } else {
3765 DPRINTK(PROBE, INFO, "detected SFP+: %d\n",
3766 hw->phy.sfp_type);
3767 }
3768 /* don't need this routine any more */
3769 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3770 }
3771 return;
3772 reschedule:
3773 if (test_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state))
3774 mod_timer(&adapter->sfp_timer,
3775 round_jiffies(jiffies + (2 * HZ)));
3776 }
3777
3778 /**
3779 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
3780 * @adapter: board private structure to initialize
3781 *
3782 * ixgbe_sw_init initializes the Adapter private data structure.
3783 * Fields are initialized based on PCI device information and
3784 * OS network device settings (MTU size).
3785 **/
3786 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
3787 {
3788 struct ixgbe_hw *hw = &adapter->hw;
3789 struct pci_dev *pdev = adapter->pdev;
3790 unsigned int rss;
3791 #ifdef CONFIG_IXGBE_DCB
3792 int j;
3793 struct tc_configuration *tc;
3794 #endif
3795
3796 /* PCI config space info */
3797
3798 hw->vendor_id = pdev->vendor;
3799 hw->device_id = pdev->device;
3800 hw->revision_id = pdev->revision;
3801 hw->subsystem_vendor_id = pdev->subsystem_vendor;
3802 hw->subsystem_device_id = pdev->subsystem_device;
3803
3804 /* Set capability flags */
3805 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
3806 adapter->ring_feature[RING_F_RSS].indices = rss;
3807 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
3808 adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
3809 if (hw->mac.type == ixgbe_mac_82598EB) {
3810 if (hw->device_id == IXGBE_DEV_ID_82598AT)
3811 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
3812 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
3813 } else if (hw->mac.type == ixgbe_mac_82599EB) {
3814 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
3815 adapter->flags |= IXGBE_FLAG2_RSC_CAPABLE;
3816 adapter->flags |= IXGBE_FLAG2_RSC_ENABLED;
3817 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
3818 adapter->ring_feature[RING_F_FDIR].indices =
3819 IXGBE_MAX_FDIR_INDICES;
3820 adapter->atr_sample_rate = 20;
3821 adapter->fdir_pballoc = 0;
3822 #ifdef IXGBE_FCOE
3823 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
3824 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
3825 adapter->ring_feature[RING_F_FCOE].indices = 0;
3826 #endif /* IXGBE_FCOE */
3827 }
3828
3829 #ifdef CONFIG_IXGBE_DCB
3830 /* Configure DCB traffic classes */
3831 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
3832 tc = &adapter->dcb_cfg.tc_config[j];
3833 tc->path[DCB_TX_CONFIG].bwg_id = 0;
3834 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
3835 tc->path[DCB_RX_CONFIG].bwg_id = 0;
3836 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
3837 tc->dcb_pfc = pfc_disabled;
3838 }
3839 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
3840 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
3841 adapter->dcb_cfg.rx_pba_cfg = pba_equal;
3842 adapter->dcb_cfg.pfc_mode_enable = false;
3843 adapter->dcb_cfg.round_robin_enable = false;
3844 adapter->dcb_set_bitmap = 0x00;
3845 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
3846 adapter->ring_feature[RING_F_DCB].indices);
3847
3848 #endif
3849
3850 /* default flow control settings */
3851 hw->fc.requested_mode = ixgbe_fc_full;
3852 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
3853 #ifdef CONFIG_DCB
3854 adapter->last_lfc_mode = hw->fc.current_mode;
3855 #endif
3856 hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
3857 hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
3858 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
3859 hw->fc.send_xon = true;
3860 hw->fc.disable_fc_autoneg = false;
3861
3862 /* enable itr by default in dynamic mode */
3863 adapter->itr_setting = 1;
3864 adapter->eitr_param = 20000;
3865
3866 /* set defaults for eitr in MegaBytes */
3867 adapter->eitr_low = 10;
3868 adapter->eitr_high = 20;
3869
3870 /* set default ring sizes */
3871 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
3872 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
3873
3874 /* initialize eeprom parameters */
3875 if (ixgbe_init_eeprom_params_generic(hw)) {
3876 dev_err(&pdev->dev, "EEPROM initialization failed\n");
3877 return -EIO;
3878 }
3879
3880 /* enable rx csum by default */
3881 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
3882
3883 set_bit(__IXGBE_DOWN, &adapter->state);
3884
3885 return 0;
3886 }
3887
3888 /**
3889 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
3890 * @adapter: board private structure
3891 * @tx_ring: tx descriptor ring (for a specific queue) to setup
3892 *
3893 * Return 0 on success, negative on failure
3894 **/
3895 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
3896 struct ixgbe_ring *tx_ring)
3897 {
3898 struct pci_dev *pdev = adapter->pdev;
3899 int size;
3900
3901 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
3902 tx_ring->tx_buffer_info = vmalloc(size);
3903 if (!tx_ring->tx_buffer_info)
3904 goto err;
3905 memset(tx_ring->tx_buffer_info, 0, size);
3906
3907 /* round up to nearest 4K */
3908 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
3909 tx_ring->size = ALIGN(tx_ring->size, 4096);
3910
3911 tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
3912 &tx_ring->dma);
3913 if (!tx_ring->desc)
3914 goto err;
3915
3916 tx_ring->next_to_use = 0;
3917 tx_ring->next_to_clean = 0;
3918 tx_ring->work_limit = tx_ring->count;
3919 return 0;
3920
3921 err:
3922 vfree(tx_ring->tx_buffer_info);
3923 tx_ring->tx_buffer_info = NULL;
3924 DPRINTK(PROBE, ERR, "Unable to allocate memory for the transmit "
3925 "descriptor ring\n");
3926 return -ENOMEM;
3927 }
3928
3929 /**
3930 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
3931 * @adapter: board private structure
3932 *
3933 * If this function returns with an error, then it's possible one or
3934 * more of the rings is populated (while the rest are not). It is the
3935 * callers duty to clean those orphaned rings.
3936 *
3937 * Return 0 on success, negative on failure
3938 **/
3939 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
3940 {
3941 int i, err = 0;
3942
3943 for (i = 0; i < adapter->num_tx_queues; i++) {
3944 err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]);
3945 if (!err)
3946 continue;
3947 DPRINTK(PROBE, ERR, "Allocation for Tx Queue %u failed\n", i);
3948 break;
3949 }
3950
3951 return err;
3952 }
3953
3954 /**
3955 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
3956 * @adapter: board private structure
3957 * @rx_ring: rx descriptor ring (for a specific queue) to setup
3958 *
3959 * Returns 0 on success, negative on failure
3960 **/
3961 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
3962 struct ixgbe_ring *rx_ring)
3963 {
3964 struct pci_dev *pdev = adapter->pdev;
3965 int size;
3966
3967 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
3968 rx_ring->rx_buffer_info = vmalloc(size);
3969 if (!rx_ring->rx_buffer_info) {
3970 DPRINTK(PROBE, ERR,
3971 "vmalloc allocation failed for the rx desc ring\n");
3972 goto alloc_failed;
3973 }
3974 memset(rx_ring->rx_buffer_info, 0, size);
3975
3976 /* Round up to nearest 4K */
3977 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
3978 rx_ring->size = ALIGN(rx_ring->size, 4096);
3979
3980 rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size, &rx_ring->dma);
3981
3982 if (!rx_ring->desc) {
3983 DPRINTK(PROBE, ERR,
3984 "Memory allocation failed for the rx desc ring\n");
3985 vfree(rx_ring->rx_buffer_info);
3986 goto alloc_failed;
3987 }
3988
3989 rx_ring->next_to_clean = 0;
3990 rx_ring->next_to_use = 0;
3991
3992 return 0;
3993
3994 alloc_failed:
3995 return -ENOMEM;
3996 }
3997
3998 /**
3999 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
4000 * @adapter: board private structure
4001 *
4002 * If this function returns with an error, then it's possible one or
4003 * more of the rings is populated (while the rest are not). It is the
4004 * callers duty to clean those orphaned rings.
4005 *
4006 * Return 0 on success, negative on failure
4007 **/
4008
4009 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
4010 {
4011 int i, err = 0;
4012
4013 for (i = 0; i < adapter->num_rx_queues; i++) {
4014 err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]);
4015 if (!err)
4016 continue;
4017 DPRINTK(PROBE, ERR, "Allocation for Rx Queue %u failed\n", i);
4018 break;
4019 }
4020
4021 return err;
4022 }
4023
4024 /**
4025 * ixgbe_free_tx_resources - Free Tx Resources per Queue
4026 * @adapter: board private structure
4027 * @tx_ring: Tx descriptor ring for a specific queue
4028 *
4029 * Free all transmit software resources
4030 **/
4031 void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
4032 struct ixgbe_ring *tx_ring)
4033 {
4034 struct pci_dev *pdev = adapter->pdev;
4035
4036 ixgbe_clean_tx_ring(adapter, tx_ring);
4037
4038 vfree(tx_ring->tx_buffer_info);
4039 tx_ring->tx_buffer_info = NULL;
4040
4041 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
4042
4043 tx_ring->desc = NULL;
4044 }
4045
4046 /**
4047 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
4048 * @adapter: board private structure
4049 *
4050 * Free all transmit software resources
4051 **/
4052 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
4053 {
4054 int i;
4055
4056 for (i = 0; i < adapter->num_tx_queues; i++)
4057 if (adapter->tx_ring[i].desc)
4058 ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
4059 }
4060
4061 /**
4062 * ixgbe_free_rx_resources - Free Rx Resources
4063 * @adapter: board private structure
4064 * @rx_ring: ring to clean the resources from
4065 *
4066 * Free all receive software resources
4067 **/
4068 void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
4069 struct ixgbe_ring *rx_ring)
4070 {
4071 struct pci_dev *pdev = adapter->pdev;
4072
4073 ixgbe_clean_rx_ring(adapter, rx_ring);
4074
4075 vfree(rx_ring->rx_buffer_info);
4076 rx_ring->rx_buffer_info = NULL;
4077
4078 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
4079
4080 rx_ring->desc = NULL;
4081 }
4082
4083 /**
4084 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
4085 * @adapter: board private structure
4086 *
4087 * Free all receive software resources
4088 **/
4089 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
4090 {
4091 int i;
4092
4093 for (i = 0; i < adapter->num_rx_queues; i++)
4094 if (adapter->rx_ring[i].desc)
4095 ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
4096 }
4097
4098 /**
4099 * ixgbe_change_mtu - Change the Maximum Transfer Unit
4100 * @netdev: network interface device structure
4101 * @new_mtu: new value for maximum frame size
4102 *
4103 * Returns 0 on success, negative on failure
4104 **/
4105 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
4106 {
4107 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4108 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4109
4110 /* MTU < 68 is an error and causes problems on some kernels */
4111 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
4112 return -EINVAL;
4113
4114 DPRINTK(PROBE, INFO, "changing MTU from %d to %d\n",
4115 netdev->mtu, new_mtu);
4116 /* must set new MTU before calling down or up */
4117 netdev->mtu = new_mtu;
4118
4119 if (netif_running(netdev))
4120 ixgbe_reinit_locked(adapter);
4121
4122 return 0;
4123 }
4124
4125 /**
4126 * ixgbe_open - Called when a network interface is made active
4127 * @netdev: network interface device structure
4128 *
4129 * Returns 0 on success, negative value on failure
4130 *
4131 * The open entry point is called when a network interface is made
4132 * active by the system (IFF_UP). At this point all resources needed
4133 * for transmit and receive operations are allocated, the interrupt
4134 * handler is registered with the OS, the watchdog timer is started,
4135 * and the stack is notified that the interface is ready.
4136 **/
4137 static int ixgbe_open(struct net_device *netdev)
4138 {
4139 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4140 int err;
4141
4142 /* disallow open during test */
4143 if (test_bit(__IXGBE_TESTING, &adapter->state))
4144 return -EBUSY;
4145
4146 netif_carrier_off(netdev);
4147
4148 /* allocate transmit descriptors */
4149 err = ixgbe_setup_all_tx_resources(adapter);
4150 if (err)
4151 goto err_setup_tx;
4152
4153 /* allocate receive descriptors */
4154 err = ixgbe_setup_all_rx_resources(adapter);
4155 if (err)
4156 goto err_setup_rx;
4157
4158 ixgbe_configure(adapter);
4159
4160 err = ixgbe_request_irq(adapter);
4161 if (err)
4162 goto err_req_irq;
4163
4164 err = ixgbe_up_complete(adapter);
4165 if (err)
4166 goto err_up;
4167
4168 netif_tx_start_all_queues(netdev);
4169
4170 return 0;
4171
4172 err_up:
4173 ixgbe_release_hw_control(adapter);
4174 ixgbe_free_irq(adapter);
4175 err_req_irq:
4176 err_setup_rx:
4177 ixgbe_free_all_rx_resources(adapter);
4178 err_setup_tx:
4179 ixgbe_free_all_tx_resources(adapter);
4180 ixgbe_reset(adapter);
4181
4182 return err;
4183 }
4184
4185 /**
4186 * ixgbe_close - Disables a network interface
4187 * @netdev: network interface device structure
4188 *
4189 * Returns 0, this is not allowed to fail
4190 *
4191 * The close entry point is called when an interface is de-activated
4192 * by the OS. The hardware is still under the drivers control, but
4193 * needs to be disabled. A global MAC reset is issued to stop the
4194 * hardware, and all transmit and receive resources are freed.
4195 **/
4196 static int ixgbe_close(struct net_device *netdev)
4197 {
4198 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4199
4200 ixgbe_down(adapter);
4201 ixgbe_free_irq(adapter);
4202
4203 ixgbe_free_all_tx_resources(adapter);
4204 ixgbe_free_all_rx_resources(adapter);
4205
4206 ixgbe_release_hw_control(adapter);
4207
4208 return 0;
4209 }
4210
4211 #ifdef CONFIG_PM
4212 static int ixgbe_resume(struct pci_dev *pdev)
4213 {
4214 struct net_device *netdev = pci_get_drvdata(pdev);
4215 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4216 u32 err;
4217
4218 pci_set_power_state(pdev, PCI_D0);
4219 pci_restore_state(pdev);
4220
4221 err = pci_enable_device_mem(pdev);
4222 if (err) {
4223 printk(KERN_ERR "ixgbe: Cannot enable PCI device from "
4224 "suspend\n");
4225 return err;
4226 }
4227 pci_set_master(pdev);
4228
4229 pci_wake_from_d3(pdev, false);
4230
4231 err = ixgbe_init_interrupt_scheme(adapter);
4232 if (err) {
4233 printk(KERN_ERR "ixgbe: Cannot initialize interrupts for "
4234 "device\n");
4235 return err;
4236 }
4237
4238 ixgbe_reset(adapter);
4239
4240 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
4241
4242 if (netif_running(netdev)) {
4243 err = ixgbe_open(adapter->netdev);
4244 if (err)
4245 return err;
4246 }
4247
4248 netif_device_attach(netdev);
4249
4250 return 0;
4251 }
4252 #endif /* CONFIG_PM */
4253
4254 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
4255 {
4256 struct net_device *netdev = pci_get_drvdata(pdev);
4257 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4258 struct ixgbe_hw *hw = &adapter->hw;
4259 u32 ctrl, fctrl;
4260 u32 wufc = adapter->wol;
4261 #ifdef CONFIG_PM
4262 int retval = 0;
4263 #endif
4264
4265 netif_device_detach(netdev);
4266
4267 if (netif_running(netdev)) {
4268 ixgbe_down(adapter);
4269 ixgbe_free_irq(adapter);
4270 ixgbe_free_all_tx_resources(adapter);
4271 ixgbe_free_all_rx_resources(adapter);
4272 }
4273 ixgbe_clear_interrupt_scheme(adapter);
4274
4275 #ifdef CONFIG_PM
4276 retval = pci_save_state(pdev);
4277 if (retval)
4278 return retval;
4279
4280 #endif
4281 if (wufc) {
4282 ixgbe_set_rx_mode(netdev);
4283
4284 /* turn on all-multi mode if wake on multicast is enabled */
4285 if (wufc & IXGBE_WUFC_MC) {
4286 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4287 fctrl |= IXGBE_FCTRL_MPE;
4288 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
4289 }
4290
4291 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
4292 ctrl |= IXGBE_CTRL_GIO_DIS;
4293 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
4294
4295 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
4296 } else {
4297 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
4298 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
4299 }
4300
4301 if (wufc && hw->mac.type == ixgbe_mac_82599EB)
4302 pci_wake_from_d3(pdev, true);
4303 else
4304 pci_wake_from_d3(pdev, false);
4305
4306 *enable_wake = !!wufc;
4307
4308 ixgbe_release_hw_control(adapter);
4309
4310 pci_disable_device(pdev);
4311
4312 return 0;
4313 }
4314
4315 #ifdef CONFIG_PM
4316 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
4317 {
4318 int retval;
4319 bool wake;
4320
4321 retval = __ixgbe_shutdown(pdev, &wake);
4322 if (retval)
4323 return retval;
4324
4325 if (wake) {
4326 pci_prepare_to_sleep(pdev);
4327 } else {
4328 pci_wake_from_d3(pdev, false);
4329 pci_set_power_state(pdev, PCI_D3hot);
4330 }
4331
4332 return 0;
4333 }
4334 #endif /* CONFIG_PM */
4335
4336 static void ixgbe_shutdown(struct pci_dev *pdev)
4337 {
4338 bool wake;
4339
4340 __ixgbe_shutdown(pdev, &wake);
4341
4342 if (system_state == SYSTEM_POWER_OFF) {
4343 pci_wake_from_d3(pdev, wake);
4344 pci_set_power_state(pdev, PCI_D3hot);
4345 }
4346 }
4347
4348 /**
4349 * ixgbe_update_stats - Update the board statistics counters.
4350 * @adapter: board private structure
4351 **/
4352 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
4353 {
4354 struct ixgbe_hw *hw = &adapter->hw;
4355 u64 total_mpc = 0;
4356 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
4357
4358 if (hw->mac.type == ixgbe_mac_82599EB) {
4359 u64 rsc_count = 0;
4360 for (i = 0; i < 16; i++)
4361 adapter->hw_rx_no_dma_resources +=
4362 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4363 for (i = 0; i < adapter->num_rx_queues; i++)
4364 rsc_count += adapter->rx_ring[i].rsc_count;
4365 adapter->rsc_count = rsc_count;
4366 }
4367
4368 adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
4369 for (i = 0; i < 8; i++) {
4370 /* for packet buffers not used, the register should read 0 */
4371 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
4372 missed_rx += mpc;
4373 adapter->stats.mpc[i] += mpc;
4374 total_mpc += adapter->stats.mpc[i];
4375 if (hw->mac.type == ixgbe_mac_82598EB)
4376 adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
4377 adapter->stats.qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
4378 adapter->stats.qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
4379 adapter->stats.qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
4380 adapter->stats.qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
4381 if (hw->mac.type == ixgbe_mac_82599EB) {
4382 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4383 IXGBE_PXONRXCNT(i));
4384 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4385 IXGBE_PXOFFRXCNT(i));
4386 adapter->stats.qprdc[i] += IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4387 } else {
4388 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4389 IXGBE_PXONRXC(i));
4390 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4391 IXGBE_PXOFFRXC(i));
4392 }
4393 adapter->stats.pxontxc[i] += IXGBE_READ_REG(hw,
4394 IXGBE_PXONTXC(i));
4395 adapter->stats.pxofftxc[i] += IXGBE_READ_REG(hw,
4396 IXGBE_PXOFFTXC(i));
4397 }
4398 adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
4399 /* work around hardware counting issue */
4400 adapter->stats.gprc -= missed_rx;
4401
4402 /* 82598 hardware only has a 32 bit counter in the high register */
4403 if (hw->mac.type == ixgbe_mac_82599EB) {
4404 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
4405 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
4406 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
4407 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
4408 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORL);
4409 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
4410 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
4411 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
4412 adapter->stats.fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
4413 adapter->stats.fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
4414 #ifdef IXGBE_FCOE
4415 adapter->stats.fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
4416 adapter->stats.fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
4417 adapter->stats.fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
4418 adapter->stats.fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
4419 adapter->stats.fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
4420 adapter->stats.fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
4421 #endif /* IXGBE_FCOE */
4422 } else {
4423 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
4424 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
4425 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
4426 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
4427 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
4428 }
4429 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
4430 adapter->stats.bprc += bprc;
4431 adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
4432 if (hw->mac.type == ixgbe_mac_82598EB)
4433 adapter->stats.mprc -= bprc;
4434 adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
4435 adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
4436 adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
4437 adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
4438 adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
4439 adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
4440 adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
4441 adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
4442 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
4443 adapter->stats.lxontxc += lxon;
4444 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
4445 adapter->stats.lxofftxc += lxoff;
4446 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4447 adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
4448 adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
4449 /*
4450 * 82598 errata - tx of flow control packets is included in tx counters
4451 */
4452 xon_off_tot = lxon + lxoff;
4453 adapter->stats.gptc -= xon_off_tot;
4454 adapter->stats.mptc -= xon_off_tot;
4455 adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
4456 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4457 adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
4458 adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
4459 adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
4460 adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
4461 adapter->stats.ptc64 -= xon_off_tot;
4462 adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
4463 adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
4464 adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
4465 adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
4466 adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
4467 adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
4468
4469 /* Fill out the OS statistics structure */
4470 adapter->net_stats.multicast = adapter->stats.mprc;
4471
4472 /* Rx Errors */
4473 adapter->net_stats.rx_errors = adapter->stats.crcerrs +
4474 adapter->stats.rlec;
4475 adapter->net_stats.rx_dropped = 0;
4476 adapter->net_stats.rx_length_errors = adapter->stats.rlec;
4477 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
4478 adapter->net_stats.rx_missed_errors = total_mpc;
4479 }
4480
4481 /**
4482 * ixgbe_watchdog - Timer Call-back
4483 * @data: pointer to adapter cast into an unsigned long
4484 **/
4485 static void ixgbe_watchdog(unsigned long data)
4486 {
4487 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4488 struct ixgbe_hw *hw = &adapter->hw;
4489 u64 eics = 0;
4490 int i;
4491
4492 /*
4493 * Do the watchdog outside of interrupt context due to the lovely
4494 * delays that some of the newer hardware requires
4495 */
4496
4497 if (test_bit(__IXGBE_DOWN, &adapter->state))
4498 goto watchdog_short_circuit;
4499
4500 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
4501 /*
4502 * for legacy and MSI interrupts don't set any bits
4503 * that are enabled for EIAM, because this operation
4504 * would set *both* EIMS and EICS for any bit in EIAM
4505 */
4506 IXGBE_WRITE_REG(hw, IXGBE_EICS,
4507 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
4508 goto watchdog_reschedule;
4509 }
4510
4511 /* get one bit for every active tx/rx interrupt vector */
4512 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
4513 struct ixgbe_q_vector *qv = adapter->q_vector[i];
4514 if (qv->rxr_count || qv->txr_count)
4515 eics |= ((u64)1 << i);
4516 }
4517
4518 /* Cause software interrupt to ensure rx rings are cleaned */
4519 ixgbe_irq_rearm_queues(adapter, eics);
4520
4521 watchdog_reschedule:
4522 /* Reset the timer */
4523 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
4524
4525 watchdog_short_circuit:
4526 schedule_work(&adapter->watchdog_task);
4527 }
4528
4529 /**
4530 * ixgbe_multispeed_fiber_task - worker thread to configure multispeed fiber
4531 * @work: pointer to work_struct containing our data
4532 **/
4533 static void ixgbe_multispeed_fiber_task(struct work_struct *work)
4534 {
4535 struct ixgbe_adapter *adapter = container_of(work,
4536 struct ixgbe_adapter,
4537 multispeed_fiber_task);
4538 struct ixgbe_hw *hw = &adapter->hw;
4539 u32 autoneg;
4540
4541 adapter->flags |= IXGBE_FLAG_IN_SFP_LINK_TASK;
4542 autoneg = hw->phy.autoneg_advertised;
4543 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
4544 hw->mac.ops.get_link_capabilities(hw, &autoneg,
4545 &hw->mac.autoneg);
4546 if (hw->mac.ops.setup_link_speed)
4547 hw->mac.ops.setup_link_speed(hw, autoneg, true, true);
4548 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
4549 adapter->flags &= ~IXGBE_FLAG_IN_SFP_LINK_TASK;
4550 }
4551
4552 /**
4553 * ixgbe_sfp_config_module_task - worker thread to configure a new SFP+ module
4554 * @work: pointer to work_struct containing our data
4555 **/
4556 static void ixgbe_sfp_config_module_task(struct work_struct *work)
4557 {
4558 struct ixgbe_adapter *adapter = container_of(work,
4559 struct ixgbe_adapter,
4560 sfp_config_module_task);
4561 struct ixgbe_hw *hw = &adapter->hw;
4562 u32 err;
4563
4564 adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
4565
4566 /* Time for electrical oscillations to settle down */
4567 msleep(100);
4568 err = hw->phy.ops.identify_sfp(hw);
4569
4570 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
4571 dev_err(&adapter->pdev->dev, "failed to initialize because "
4572 "an unsupported SFP+ module type was detected.\n"
4573 "Reload the driver after installing a supported "
4574 "module.\n");
4575 unregister_netdev(adapter->netdev);
4576 return;
4577 }
4578 hw->mac.ops.setup_sfp(hw);
4579
4580 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
4581 /* This will also work for DA Twinax connections */
4582 schedule_work(&adapter->multispeed_fiber_task);
4583 adapter->flags &= ~IXGBE_FLAG_IN_SFP_MOD_TASK;
4584 }
4585
4586 /**
4587 * ixgbe_fdir_reinit_task - worker thread to reinit FDIR filter table
4588 * @work: pointer to work_struct containing our data
4589 **/
4590 static void ixgbe_fdir_reinit_task(struct work_struct *work)
4591 {
4592 struct ixgbe_adapter *adapter = container_of(work,
4593 struct ixgbe_adapter,
4594 fdir_reinit_task);
4595 struct ixgbe_hw *hw = &adapter->hw;
4596 int i;
4597
4598 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
4599 for (i = 0; i < adapter->num_tx_queues; i++)
4600 set_bit(__IXGBE_FDIR_INIT_DONE,
4601 &(adapter->tx_ring[i].reinit_state));
4602 } else {
4603 DPRINTK(PROBE, ERR, "failed to finish FDIR re-initialization, "
4604 "ignored adding FDIR ATR filters \n");
4605 }
4606 /* Done FDIR Re-initialization, enable transmits */
4607 netif_tx_start_all_queues(adapter->netdev);
4608 }
4609
4610 /**
4611 * ixgbe_watchdog_task - worker thread to bring link up
4612 * @work: pointer to work_struct containing our data
4613 **/
4614 static void ixgbe_watchdog_task(struct work_struct *work)
4615 {
4616 struct ixgbe_adapter *adapter = container_of(work,
4617 struct ixgbe_adapter,
4618 watchdog_task);
4619 struct net_device *netdev = adapter->netdev;
4620 struct ixgbe_hw *hw = &adapter->hw;
4621 u32 link_speed = adapter->link_speed;
4622 bool link_up = adapter->link_up;
4623 int i;
4624 struct ixgbe_ring *tx_ring;
4625 int some_tx_pending = 0;
4626
4627 adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
4628
4629 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
4630 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
4631 if (link_up) {
4632 #ifdef CONFIG_DCB
4633 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4634 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
4635 hw->mac.ops.fc_enable(hw, i);
4636 } else {
4637 hw->mac.ops.fc_enable(hw, 0);
4638 }
4639 #else
4640 hw->mac.ops.fc_enable(hw, 0);
4641 #endif
4642 }
4643
4644 if (link_up ||
4645 time_after(jiffies, (adapter->link_check_timeout +
4646 IXGBE_TRY_LINK_TIMEOUT))) {
4647 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
4648 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
4649 }
4650 adapter->link_up = link_up;
4651 adapter->link_speed = link_speed;
4652 }
4653
4654 if (link_up) {
4655 if (!netif_carrier_ok(netdev)) {
4656 bool flow_rx, flow_tx;
4657
4658 if (hw->mac.type == ixgbe_mac_82599EB) {
4659 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
4660 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
4661 flow_rx = (mflcn & IXGBE_MFLCN_RFCE);
4662 flow_tx = (fccfg & IXGBE_FCCFG_TFCE_802_3X);
4663 } else {
4664 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4665 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
4666 flow_rx = (frctl & IXGBE_FCTRL_RFCE);
4667 flow_tx = (rmcs & IXGBE_RMCS_TFCE_802_3X);
4668 }
4669
4670 printk(KERN_INFO "ixgbe: %s NIC Link is Up %s, "
4671 "Flow Control: %s\n",
4672 netdev->name,
4673 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
4674 "10 Gbps" :
4675 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
4676 "1 Gbps" : "unknown speed")),
4677 ((flow_rx && flow_tx) ? "RX/TX" :
4678 (flow_rx ? "RX" :
4679 (flow_tx ? "TX" : "None"))));
4680
4681 netif_carrier_on(netdev);
4682 } else {
4683 /* Force detection of hung controller */
4684 adapter->detect_tx_hung = true;
4685 }
4686 } else {
4687 adapter->link_up = false;
4688 adapter->link_speed = 0;
4689 if (netif_carrier_ok(netdev)) {
4690 printk(KERN_INFO "ixgbe: %s NIC Link is Down\n",
4691 netdev->name);
4692 netif_carrier_off(netdev);
4693 }
4694 }
4695
4696 if (!netif_carrier_ok(netdev)) {
4697 for (i = 0; i < adapter->num_tx_queues; i++) {
4698 tx_ring = &adapter->tx_ring[i];
4699 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
4700 some_tx_pending = 1;
4701 break;
4702 }
4703 }
4704
4705 if (some_tx_pending) {
4706 /* We've lost link, so the controller stops DMA,
4707 * but we've got queued Tx work that's never going
4708 * to get done, so reset controller to flush Tx.
4709 * (Do the reset outside of interrupt context).
4710 */
4711 schedule_work(&adapter->reset_task);
4712 }
4713 }
4714
4715 ixgbe_update_stats(adapter);
4716 adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
4717 }
4718
4719 static int ixgbe_tso(struct ixgbe_adapter *adapter,
4720 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
4721 u32 tx_flags, u8 *hdr_len)
4722 {
4723 struct ixgbe_adv_tx_context_desc *context_desc;
4724 unsigned int i;
4725 int err;
4726 struct ixgbe_tx_buffer *tx_buffer_info;
4727 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
4728 u32 mss_l4len_idx, l4len;
4729
4730 if (skb_is_gso(skb)) {
4731 if (skb_header_cloned(skb)) {
4732 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
4733 if (err)
4734 return err;
4735 }
4736 l4len = tcp_hdrlen(skb);
4737 *hdr_len += l4len;
4738
4739 if (skb->protocol == htons(ETH_P_IP)) {
4740 struct iphdr *iph = ip_hdr(skb);
4741 iph->tot_len = 0;
4742 iph->check = 0;
4743 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
4744 iph->daddr, 0,
4745 IPPROTO_TCP,
4746 0);
4747 adapter->hw_tso_ctxt++;
4748 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
4749 ipv6_hdr(skb)->payload_len = 0;
4750 tcp_hdr(skb)->check =
4751 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
4752 &ipv6_hdr(skb)->daddr,
4753 0, IPPROTO_TCP, 0);
4754 adapter->hw_tso6_ctxt++;
4755 }
4756
4757 i = tx_ring->next_to_use;
4758
4759 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4760 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4761
4762 /* VLAN MACLEN IPLEN */
4763 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4764 vlan_macip_lens |=
4765 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4766 vlan_macip_lens |= ((skb_network_offset(skb)) <<
4767 IXGBE_ADVTXD_MACLEN_SHIFT);
4768 *hdr_len += skb_network_offset(skb);
4769 vlan_macip_lens |=
4770 (skb_transport_header(skb) - skb_network_header(skb));
4771 *hdr_len +=
4772 (skb_transport_header(skb) - skb_network_header(skb));
4773 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4774 context_desc->seqnum_seed = 0;
4775
4776 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
4777 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
4778 IXGBE_ADVTXD_DTYP_CTXT);
4779
4780 if (skb->protocol == htons(ETH_P_IP))
4781 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4782 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
4783 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4784
4785 /* MSS L4LEN IDX */
4786 mss_l4len_idx =
4787 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
4788 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
4789 /* use index 1 for TSO */
4790 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4791 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
4792
4793 tx_buffer_info->time_stamp = jiffies;
4794 tx_buffer_info->next_to_watch = i;
4795
4796 i++;
4797 if (i == tx_ring->count)
4798 i = 0;
4799 tx_ring->next_to_use = i;
4800
4801 return true;
4802 }
4803 return false;
4804 }
4805
4806 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
4807 struct ixgbe_ring *tx_ring,
4808 struct sk_buff *skb, u32 tx_flags)
4809 {
4810 struct ixgbe_adv_tx_context_desc *context_desc;
4811 unsigned int i;
4812 struct ixgbe_tx_buffer *tx_buffer_info;
4813 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
4814
4815 if (skb->ip_summed == CHECKSUM_PARTIAL ||
4816 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
4817 i = tx_ring->next_to_use;
4818 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4819 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4820
4821 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4822 vlan_macip_lens |=
4823 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4824 vlan_macip_lens |= (skb_network_offset(skb) <<
4825 IXGBE_ADVTXD_MACLEN_SHIFT);
4826 if (skb->ip_summed == CHECKSUM_PARTIAL)
4827 vlan_macip_lens |= (skb_transport_header(skb) -
4828 skb_network_header(skb));
4829
4830 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4831 context_desc->seqnum_seed = 0;
4832
4833 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
4834 IXGBE_ADVTXD_DTYP_CTXT);
4835
4836 if (skb->ip_summed == CHECKSUM_PARTIAL) {
4837 switch (skb->protocol) {
4838 case cpu_to_be16(ETH_P_IP):
4839 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4840 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
4841 type_tucmd_mlhl |=
4842 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4843 else if (ip_hdr(skb)->protocol == IPPROTO_SCTP)
4844 type_tucmd_mlhl |=
4845 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4846 break;
4847 case cpu_to_be16(ETH_P_IPV6):
4848 /* XXX what about other V6 headers?? */
4849 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
4850 type_tucmd_mlhl |=
4851 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4852 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_SCTP)
4853 type_tucmd_mlhl |=
4854 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4855 break;
4856 default:
4857 if (unlikely(net_ratelimit())) {
4858 DPRINTK(PROBE, WARNING,
4859 "partial checksum but proto=%x!\n",
4860 skb->protocol);
4861 }
4862 break;
4863 }
4864 }
4865
4866 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4867 /* use index zero for tx checksum offload */
4868 context_desc->mss_l4len_idx = 0;
4869
4870 tx_buffer_info->time_stamp = jiffies;
4871 tx_buffer_info->next_to_watch = i;
4872
4873 adapter->hw_csum_tx_good++;
4874 i++;
4875 if (i == tx_ring->count)
4876 i = 0;
4877 tx_ring->next_to_use = i;
4878
4879 return true;
4880 }
4881
4882 return false;
4883 }
4884
4885 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
4886 struct ixgbe_ring *tx_ring,
4887 struct sk_buff *skb, u32 tx_flags,
4888 unsigned int first)
4889 {
4890 struct ixgbe_tx_buffer *tx_buffer_info;
4891 unsigned int len;
4892 unsigned int total = skb->len;
4893 unsigned int offset = 0, size, count = 0, i;
4894 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
4895 unsigned int f;
4896 dma_addr_t *map;
4897
4898 i = tx_ring->next_to_use;
4899
4900 if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
4901 dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
4902 return 0;
4903 }
4904
4905 map = skb_shinfo(skb)->dma_maps;
4906
4907 if (tx_flags & IXGBE_TX_FLAGS_FCOE)
4908 /* excluding fcoe_crc_eof for FCoE */
4909 total -= sizeof(struct fcoe_crc_eof);
4910
4911 len = min(skb_headlen(skb), total);
4912 while (len) {
4913 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4914 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
4915
4916 tx_buffer_info->length = size;
4917 tx_buffer_info->dma = skb_shinfo(skb)->dma_head + offset;
4918 tx_buffer_info->time_stamp = jiffies;
4919 tx_buffer_info->next_to_watch = i;
4920
4921 len -= size;
4922 total -= size;
4923 offset += size;
4924 count++;
4925
4926 if (len) {
4927 i++;
4928 if (i == tx_ring->count)
4929 i = 0;
4930 }
4931 }
4932
4933 for (f = 0; f < nr_frags; f++) {
4934 struct skb_frag_struct *frag;
4935
4936 frag = &skb_shinfo(skb)->frags[f];
4937 len = min((unsigned int)frag->size, total);
4938 offset = 0;
4939
4940 while (len) {
4941 i++;
4942 if (i == tx_ring->count)
4943 i = 0;
4944
4945 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4946 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
4947
4948 tx_buffer_info->length = size;
4949 tx_buffer_info->dma = map[f] + offset;
4950 tx_buffer_info->time_stamp = jiffies;
4951 tx_buffer_info->next_to_watch = i;
4952
4953 len -= size;
4954 total -= size;
4955 offset += size;
4956 count++;
4957 }
4958 if (total == 0)
4959 break;
4960 }
4961
4962 tx_ring->tx_buffer_info[i].skb = skb;
4963 tx_ring->tx_buffer_info[first].next_to_watch = i;
4964
4965 return count;
4966 }
4967
4968 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
4969 struct ixgbe_ring *tx_ring,
4970 int tx_flags, int count, u32 paylen, u8 hdr_len)
4971 {
4972 union ixgbe_adv_tx_desc *tx_desc = NULL;
4973 struct ixgbe_tx_buffer *tx_buffer_info;
4974 u32 olinfo_status = 0, cmd_type_len = 0;
4975 unsigned int i;
4976 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
4977
4978 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
4979
4980 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
4981
4982 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4983 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
4984
4985 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
4986 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
4987
4988 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
4989 IXGBE_ADVTXD_POPTS_SHIFT;
4990
4991 /* use index 1 context for tso */
4992 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4993 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
4994 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
4995 IXGBE_ADVTXD_POPTS_SHIFT;
4996
4997 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
4998 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
4999 IXGBE_ADVTXD_POPTS_SHIFT;
5000
5001 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
5002 olinfo_status |= IXGBE_ADVTXD_CC;
5003 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
5004 if (tx_flags & IXGBE_TX_FLAGS_FSO)
5005 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
5006 }
5007
5008 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
5009
5010 i = tx_ring->next_to_use;
5011 while (count--) {
5012 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5013 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
5014 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
5015 tx_desc->read.cmd_type_len =
5016 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
5017 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
5018 i++;
5019 if (i == tx_ring->count)
5020 i = 0;
5021 }
5022
5023 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
5024
5025 /*
5026 * Force memory writes to complete before letting h/w
5027 * know there are new descriptors to fetch. (Only
5028 * applicable for weak-ordered memory model archs,
5029 * such as IA-64).
5030 */
5031 wmb();
5032
5033 tx_ring->next_to_use = i;
5034 writel(i, adapter->hw.hw_addr + tx_ring->tail);
5035 }
5036
5037 static void ixgbe_atr(struct ixgbe_adapter *adapter, struct sk_buff *skb,
5038 int queue, u32 tx_flags)
5039 {
5040 /* Right now, we support IPv4 only */
5041 struct ixgbe_atr_input atr_input;
5042 struct tcphdr *th;
5043 struct udphdr *uh;
5044 struct iphdr *iph = ip_hdr(skb);
5045 struct ethhdr *eth = (struct ethhdr *)skb->data;
5046 u16 vlan_id, src_port, dst_port, flex_bytes;
5047 u32 src_ipv4_addr, dst_ipv4_addr;
5048 u8 l4type = 0;
5049
5050 /* check if we're UDP or TCP */
5051 if (iph->protocol == IPPROTO_TCP) {
5052 th = tcp_hdr(skb);
5053 src_port = th->source;
5054 dst_port = th->dest;
5055 l4type |= IXGBE_ATR_L4TYPE_TCP;
5056 /* l4type IPv4 type is 0, no need to assign */
5057 } else if(iph->protocol == IPPROTO_UDP) {
5058 uh = udp_hdr(skb);
5059 src_port = uh->source;
5060 dst_port = uh->dest;
5061 l4type |= IXGBE_ATR_L4TYPE_UDP;
5062 /* l4type IPv4 type is 0, no need to assign */
5063 } else {
5064 /* Unsupported L4 header, just bail here */
5065 return;
5066 }
5067
5068 memset(&atr_input, 0, sizeof(struct ixgbe_atr_input));
5069
5070 vlan_id = (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK) >>
5071 IXGBE_TX_FLAGS_VLAN_SHIFT;
5072 src_ipv4_addr = iph->saddr;
5073 dst_ipv4_addr = iph->daddr;
5074 flex_bytes = eth->h_proto;
5075
5076 ixgbe_atr_set_vlan_id_82599(&atr_input, vlan_id);
5077 ixgbe_atr_set_src_port_82599(&atr_input, dst_port);
5078 ixgbe_atr_set_dst_port_82599(&atr_input, src_port);
5079 ixgbe_atr_set_flex_byte_82599(&atr_input, flex_bytes);
5080 ixgbe_atr_set_l4type_82599(&atr_input, l4type);
5081 /* src and dst are inverted, think how the receiver sees them */
5082 ixgbe_atr_set_src_ipv4_82599(&atr_input, dst_ipv4_addr);
5083 ixgbe_atr_set_dst_ipv4_82599(&atr_input, src_ipv4_addr);
5084
5085 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
5086 ixgbe_fdir_add_signature_filter_82599(&adapter->hw, &atr_input, queue);
5087 }
5088
5089 static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
5090 struct ixgbe_ring *tx_ring, int size)
5091 {
5092 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5093
5094 netif_stop_subqueue(netdev, tx_ring->queue_index);
5095 /* Herbert's original patch had:
5096 * smp_mb__after_netif_stop_queue();
5097 * but since that doesn't exist yet, just open code it. */
5098 smp_mb();
5099
5100 /* We need to check again in a case another CPU has just
5101 * made room available. */
5102 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
5103 return -EBUSY;
5104
5105 /* A reprieve! - use start_queue because it doesn't call schedule */
5106 netif_start_subqueue(netdev, tx_ring->queue_index);
5107 ++adapter->restart_queue;
5108 return 0;
5109 }
5110
5111 static int ixgbe_maybe_stop_tx(struct net_device *netdev,
5112 struct ixgbe_ring *tx_ring, int size)
5113 {
5114 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
5115 return 0;
5116 return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
5117 }
5118
5119 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
5120 {
5121 struct ixgbe_adapter *adapter = netdev_priv(dev);
5122
5123 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
5124 return smp_processor_id();
5125
5126 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
5127 return 0; /* All traffic should default to class 0 */
5128
5129 return skb_tx_hash(dev, skb);
5130 }
5131
5132 static int ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
5133 {
5134 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5135 struct ixgbe_ring *tx_ring;
5136 unsigned int first;
5137 unsigned int tx_flags = 0;
5138 u8 hdr_len = 0;
5139 int r_idx = 0, tso;
5140 int count = 0;
5141 unsigned int f;
5142
5143 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
5144 tx_flags |= vlan_tx_tag_get(skb);
5145 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5146 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
5147 tx_flags |= (skb->queue_mapping << 13);
5148 }
5149 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
5150 tx_flags |= IXGBE_TX_FLAGS_VLAN;
5151 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5152 if (skb->priority != TC_PRIO_CONTROL) {
5153 tx_flags |= (skb->queue_mapping << 13);
5154 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
5155 tx_flags |= IXGBE_TX_FLAGS_VLAN;
5156 } else {
5157 skb->queue_mapping =
5158 adapter->ring_feature[RING_F_DCB].indices-1;
5159 }
5160 }
5161
5162 r_idx = skb->queue_mapping;
5163 tx_ring = &adapter->tx_ring[r_idx];
5164
5165 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
5166 (skb->protocol == htons(ETH_P_FCOE)))
5167 tx_flags |= IXGBE_TX_FLAGS_FCOE;
5168
5169 /* four things can cause us to need a context descriptor */
5170 if (skb_is_gso(skb) ||
5171 (skb->ip_summed == CHECKSUM_PARTIAL) ||
5172 (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
5173 (tx_flags & IXGBE_TX_FLAGS_FCOE))
5174 count++;
5175
5176 count += TXD_USE_COUNT(skb_headlen(skb));
5177 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
5178 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
5179
5180 if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
5181 adapter->tx_busy++;
5182 return NETDEV_TX_BUSY;
5183 }
5184
5185 first = tx_ring->next_to_use;
5186 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
5187 #ifdef IXGBE_FCOE
5188 /* setup tx offload for FCoE */
5189 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
5190 if (tso < 0) {
5191 dev_kfree_skb_any(skb);
5192 return NETDEV_TX_OK;
5193 }
5194 if (tso)
5195 tx_flags |= IXGBE_TX_FLAGS_FSO;
5196 #endif /* IXGBE_FCOE */
5197 } else {
5198 if (skb->protocol == htons(ETH_P_IP))
5199 tx_flags |= IXGBE_TX_FLAGS_IPV4;
5200 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
5201 if (tso < 0) {
5202 dev_kfree_skb_any(skb);
5203 return NETDEV_TX_OK;
5204 }
5205
5206 if (tso)
5207 tx_flags |= IXGBE_TX_FLAGS_TSO;
5208 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
5209 (skb->ip_summed == CHECKSUM_PARTIAL))
5210 tx_flags |= IXGBE_TX_FLAGS_CSUM;
5211 }
5212
5213 count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first);
5214 if (count) {
5215 /* add the ATR filter if ATR is on */
5216 if (tx_ring->atr_sample_rate) {
5217 ++tx_ring->atr_count;
5218 if ((tx_ring->atr_count >= tx_ring->atr_sample_rate) &&
5219 test_bit(__IXGBE_FDIR_INIT_DONE,
5220 &tx_ring->reinit_state)) {
5221 ixgbe_atr(adapter, skb, tx_ring->queue_index,
5222 tx_flags);
5223 tx_ring->atr_count = 0;
5224 }
5225 }
5226 ixgbe_tx_queue(adapter, tx_ring, tx_flags, count, skb->len,
5227 hdr_len);
5228 ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
5229
5230 } else {
5231 dev_kfree_skb_any(skb);
5232 tx_ring->tx_buffer_info[first].time_stamp = 0;
5233 tx_ring->next_to_use = first;
5234 }
5235
5236 return NETDEV_TX_OK;
5237 }
5238
5239 /**
5240 * ixgbe_get_stats - Get System Network Statistics
5241 * @netdev: network interface device structure
5242 *
5243 * Returns the address of the device statistics structure.
5244 * The statistics are actually updated from the timer callback.
5245 **/
5246 static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
5247 {
5248 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5249
5250 /* only return the current stats */
5251 return &adapter->net_stats;
5252 }
5253
5254 /**
5255 * ixgbe_set_mac - Change the Ethernet Address of the NIC
5256 * @netdev: network interface device structure
5257 * @p: pointer to an address structure
5258 *
5259 * Returns 0 on success, negative on failure
5260 **/
5261 static int ixgbe_set_mac(struct net_device *netdev, void *p)
5262 {
5263 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5264 struct ixgbe_hw *hw = &adapter->hw;
5265 struct sockaddr *addr = p;
5266
5267 if (!is_valid_ether_addr(addr->sa_data))
5268 return -EADDRNOTAVAIL;
5269
5270 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
5271 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
5272
5273 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
5274
5275 return 0;
5276 }
5277
5278 static int
5279 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
5280 {
5281 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5282 struct ixgbe_hw *hw = &adapter->hw;
5283 u16 value;
5284 int rc;
5285
5286 if (prtad != hw->phy.mdio.prtad)
5287 return -EINVAL;
5288 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
5289 if (!rc)
5290 rc = value;
5291 return rc;
5292 }
5293
5294 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
5295 u16 addr, u16 value)
5296 {
5297 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5298 struct ixgbe_hw *hw = &adapter->hw;
5299
5300 if (prtad != hw->phy.mdio.prtad)
5301 return -EINVAL;
5302 return hw->phy.ops.write_reg(hw, addr, devad, value);
5303 }
5304
5305 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
5306 {
5307 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5308
5309 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
5310 }
5311
5312 /**
5313 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
5314 * netdev->dev_addrs
5315 * @netdev: network interface device structure
5316 *
5317 * Returns non-zero on failure
5318 **/
5319 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
5320 {
5321 int err = 0;
5322 struct ixgbe_adapter *adapter = netdev_priv(dev);
5323 struct ixgbe_mac_info *mac = &adapter->hw.mac;
5324
5325 if (is_valid_ether_addr(mac->san_addr)) {
5326 rtnl_lock();
5327 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
5328 rtnl_unlock();
5329 }
5330 return err;
5331 }
5332
5333 /**
5334 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
5335 * netdev->dev_addrs
5336 * @netdev: network interface device structure
5337 *
5338 * Returns non-zero on failure
5339 **/
5340 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
5341 {
5342 int err = 0;
5343 struct ixgbe_adapter *adapter = netdev_priv(dev);
5344 struct ixgbe_mac_info *mac = &adapter->hw.mac;
5345
5346 if (is_valid_ether_addr(mac->san_addr)) {
5347 rtnl_lock();
5348 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
5349 rtnl_unlock();
5350 }
5351 return err;
5352 }
5353
5354 #ifdef CONFIG_NET_POLL_CONTROLLER
5355 /*
5356 * Polling 'interrupt' - used by things like netconsole to send skbs
5357 * without having to re-enable interrupts. It's not called while
5358 * the interrupt routine is executing.
5359 */
5360 static void ixgbe_netpoll(struct net_device *netdev)
5361 {
5362 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5363
5364 disable_irq(adapter->pdev->irq);
5365 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
5366 ixgbe_intr(adapter->pdev->irq, netdev);
5367 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
5368 enable_irq(adapter->pdev->irq);
5369 }
5370 #endif
5371
5372 static const struct net_device_ops ixgbe_netdev_ops = {
5373 .ndo_open = ixgbe_open,
5374 .ndo_stop = ixgbe_close,
5375 .ndo_start_xmit = ixgbe_xmit_frame,
5376 .ndo_select_queue = ixgbe_select_queue,
5377 .ndo_get_stats = ixgbe_get_stats,
5378 .ndo_set_rx_mode = ixgbe_set_rx_mode,
5379 .ndo_set_multicast_list = ixgbe_set_rx_mode,
5380 .ndo_validate_addr = eth_validate_addr,
5381 .ndo_set_mac_address = ixgbe_set_mac,
5382 .ndo_change_mtu = ixgbe_change_mtu,
5383 .ndo_tx_timeout = ixgbe_tx_timeout,
5384 .ndo_vlan_rx_register = ixgbe_vlan_rx_register,
5385 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
5386 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
5387 .ndo_do_ioctl = ixgbe_ioctl,
5388 #ifdef CONFIG_NET_POLL_CONTROLLER
5389 .ndo_poll_controller = ixgbe_netpoll,
5390 #endif
5391 #ifdef IXGBE_FCOE
5392 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
5393 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
5394 #endif /* IXGBE_FCOE */
5395 };
5396
5397 /**
5398 * ixgbe_probe - Device Initialization Routine
5399 * @pdev: PCI device information struct
5400 * @ent: entry in ixgbe_pci_tbl
5401 *
5402 * Returns 0 on success, negative on failure
5403 *
5404 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
5405 * The OS initialization, configuring of the adapter private structure,
5406 * and a hardware reset occur.
5407 **/
5408 static int __devinit ixgbe_probe(struct pci_dev *pdev,
5409 const struct pci_device_id *ent)
5410 {
5411 struct net_device *netdev;
5412 struct ixgbe_adapter *adapter = NULL;
5413 struct ixgbe_hw *hw;
5414 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
5415 static int cards_found;
5416 int i, err, pci_using_dac;
5417 #ifdef IXGBE_FCOE
5418 u16 device_caps;
5419 #endif
5420 u32 part_num, eec;
5421
5422 err = pci_enable_device_mem(pdev);
5423 if (err)
5424 return err;
5425
5426 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) &&
5427 !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
5428 pci_using_dac = 1;
5429 } else {
5430 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5431 if (err) {
5432 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5433 if (err) {
5434 dev_err(&pdev->dev, "No usable DMA "
5435 "configuration, aborting\n");
5436 goto err_dma;
5437 }
5438 }
5439 pci_using_dac = 0;
5440 }
5441
5442 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
5443 IORESOURCE_MEM), ixgbe_driver_name);
5444 if (err) {
5445 dev_err(&pdev->dev,
5446 "pci_request_selected_regions failed 0x%x\n", err);
5447 goto err_pci_reg;
5448 }
5449
5450 err = pci_enable_pcie_error_reporting(pdev);
5451 if (err) {
5452 dev_err(&pdev->dev, "pci_enable_pcie_error_reporting failed "
5453 "0x%x\n", err);
5454 /* non-fatal, continue */
5455 }
5456
5457 pci_set_master(pdev);
5458 pci_save_state(pdev);
5459
5460 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES);
5461 if (!netdev) {
5462 err = -ENOMEM;
5463 goto err_alloc_etherdev;
5464 }
5465
5466 SET_NETDEV_DEV(netdev, &pdev->dev);
5467
5468 pci_set_drvdata(pdev, netdev);
5469 adapter = netdev_priv(netdev);
5470
5471 adapter->netdev = netdev;
5472 adapter->pdev = pdev;
5473 hw = &adapter->hw;
5474 hw->back = adapter;
5475 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
5476
5477 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
5478 pci_resource_len(pdev, 0));
5479 if (!hw->hw_addr) {
5480 err = -EIO;
5481 goto err_ioremap;
5482 }
5483
5484 for (i = 1; i <= 5; i++) {
5485 if (pci_resource_len(pdev, i) == 0)
5486 continue;
5487 }
5488
5489 netdev->netdev_ops = &ixgbe_netdev_ops;
5490 ixgbe_set_ethtool_ops(netdev);
5491 netdev->watchdog_timeo = 5 * HZ;
5492 strcpy(netdev->name, pci_name(pdev));
5493
5494 adapter->bd_number = cards_found;
5495
5496 /* Setup hw api */
5497 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
5498 hw->mac.type = ii->mac;
5499
5500 /* EEPROM */
5501 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
5502 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
5503 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
5504 if (!(eec & (1 << 8)))
5505 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
5506
5507 /* PHY */
5508 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
5509 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
5510 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
5511 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
5512 hw->phy.mdio.mmds = 0;
5513 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
5514 hw->phy.mdio.dev = netdev;
5515 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
5516 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
5517
5518 /* set up this timer and work struct before calling get_invariants
5519 * which might start the timer
5520 */
5521 init_timer(&adapter->sfp_timer);
5522 adapter->sfp_timer.function = &ixgbe_sfp_timer;
5523 adapter->sfp_timer.data = (unsigned long) adapter;
5524
5525 INIT_WORK(&adapter->sfp_task, ixgbe_sfp_task);
5526
5527 /* multispeed fiber has its own tasklet, called from GPI SDP1 context */
5528 INIT_WORK(&adapter->multispeed_fiber_task, ixgbe_multispeed_fiber_task);
5529
5530 /* a new SFP+ module arrival, called from GPI SDP2 context */
5531 INIT_WORK(&adapter->sfp_config_module_task,
5532 ixgbe_sfp_config_module_task);
5533
5534 ii->get_invariants(hw);
5535
5536 /* setup the private structure */
5537 err = ixgbe_sw_init(adapter);
5538 if (err)
5539 goto err_sw_init;
5540
5541 /*
5542 * If there is a fan on this device and it has failed log the
5543 * failure.
5544 */
5545 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
5546 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
5547 if (esdp & IXGBE_ESDP_SDP1)
5548 DPRINTK(PROBE, CRIT,
5549 "Fan has stopped, replace the adapter\n");
5550 }
5551
5552 /* reset_hw fills in the perm_addr as well */
5553 err = hw->mac.ops.reset_hw(hw);
5554 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
5555 hw->mac.type == ixgbe_mac_82598EB) {
5556 /*
5557 * Start a kernel thread to watch for a module to arrive.
5558 * Only do this for 82598, since 82599 will generate
5559 * interrupts on module arrival.
5560 */
5561 set_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5562 mod_timer(&adapter->sfp_timer,
5563 round_jiffies(jiffies + (2 * HZ)));
5564 err = 0;
5565 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5566 dev_err(&adapter->pdev->dev, "failed to initialize because "
5567 "an unsupported SFP+ module type was detected.\n"
5568 "Reload the driver after installing a supported "
5569 "module.\n");
5570 goto err_sw_init;
5571 } else if (err) {
5572 dev_err(&adapter->pdev->dev, "HW Init failed: %d\n", err);
5573 goto err_sw_init;
5574 }
5575
5576 netdev->features = NETIF_F_SG |
5577 NETIF_F_IP_CSUM |
5578 NETIF_F_HW_VLAN_TX |
5579 NETIF_F_HW_VLAN_RX |
5580 NETIF_F_HW_VLAN_FILTER;
5581
5582 netdev->features |= NETIF_F_IPV6_CSUM;
5583 netdev->features |= NETIF_F_TSO;
5584 netdev->features |= NETIF_F_TSO6;
5585 netdev->features |= NETIF_F_GRO;
5586
5587 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
5588 netdev->features |= NETIF_F_SCTP_CSUM;
5589
5590 netdev->vlan_features |= NETIF_F_TSO;
5591 netdev->vlan_features |= NETIF_F_TSO6;
5592 netdev->vlan_features |= NETIF_F_IP_CSUM;
5593 netdev->vlan_features |= NETIF_F_SG;
5594
5595 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
5596 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
5597
5598 #ifdef CONFIG_IXGBE_DCB
5599 netdev->dcbnl_ops = &dcbnl_ops;
5600 #endif
5601
5602 #ifdef IXGBE_FCOE
5603 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
5604 if (hw->mac.ops.get_device_caps) {
5605 hw->mac.ops.get_device_caps(hw, &device_caps);
5606 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
5607 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
5608 }
5609 }
5610 #endif /* IXGBE_FCOE */
5611 if (pci_using_dac)
5612 netdev->features |= NETIF_F_HIGHDMA;
5613
5614 if (adapter->flags & IXGBE_FLAG2_RSC_ENABLED)
5615 netdev->features |= NETIF_F_LRO;
5616
5617 /* make sure the EEPROM is good */
5618 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
5619 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
5620 err = -EIO;
5621 goto err_eeprom;
5622 }
5623
5624 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
5625 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
5626
5627 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
5628 dev_err(&pdev->dev, "invalid MAC address\n");
5629 err = -EIO;
5630 goto err_eeprom;
5631 }
5632
5633 init_timer(&adapter->watchdog_timer);
5634 adapter->watchdog_timer.function = &ixgbe_watchdog;
5635 adapter->watchdog_timer.data = (unsigned long)adapter;
5636
5637 INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
5638 INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
5639
5640 err = ixgbe_init_interrupt_scheme(adapter);
5641 if (err)
5642 goto err_sw_init;
5643
5644 switch (pdev->device) {
5645 case IXGBE_DEV_ID_82599_KX4:
5646 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
5647 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
5648 /* Enable ACPI wakeup in GRC */
5649 IXGBE_WRITE_REG(hw, IXGBE_GRC,
5650 (IXGBE_READ_REG(hw, IXGBE_GRC) & ~IXGBE_GRC_APME));
5651 break;
5652 default:
5653 adapter->wol = 0;
5654 break;
5655 }
5656 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
5657
5658 /* pick up the PCI bus settings for reporting later */
5659 hw->mac.ops.get_bus_info(hw);
5660
5661 /* print bus type/speed/width info */
5662 dev_info(&pdev->dev, "(PCI Express:%s:%s) %pM\n",
5663 ((hw->bus.speed == ixgbe_bus_speed_5000) ? "5.0Gb/s":
5664 (hw->bus.speed == ixgbe_bus_speed_2500) ? "2.5Gb/s":"Unknown"),
5665 ((hw->bus.width == ixgbe_bus_width_pcie_x8) ? "Width x8" :
5666 (hw->bus.width == ixgbe_bus_width_pcie_x4) ? "Width x4" :
5667 (hw->bus.width == ixgbe_bus_width_pcie_x1) ? "Width x1" :
5668 "Unknown"),
5669 netdev->dev_addr);
5670 ixgbe_read_pba_num_generic(hw, &part_num);
5671 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
5672 dev_info(&pdev->dev, "MAC: %d, PHY: %d, SFP+: %d, PBA No: %06x-%03x\n",
5673 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
5674 (part_num >> 8), (part_num & 0xff));
5675 else
5676 dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
5677 hw->mac.type, hw->phy.type,
5678 (part_num >> 8), (part_num & 0xff));
5679
5680 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
5681 dev_warn(&pdev->dev, "PCI-Express bandwidth available for "
5682 "this card is not sufficient for optimal "
5683 "performance.\n");
5684 dev_warn(&pdev->dev, "For optimal performance a x8 "
5685 "PCI-Express slot is required.\n");
5686 }
5687
5688 /* save off EEPROM version number */
5689 hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
5690
5691 /* reset the hardware with the new settings */
5692 err = hw->mac.ops.start_hw(hw);
5693
5694 if (err == IXGBE_ERR_EEPROM_VERSION) {
5695 /* We are running on a pre-production device, log a warning */
5696 dev_warn(&pdev->dev, "This device is a pre-production "
5697 "adapter/LOM. Please be aware there may be issues "
5698 "associated with your hardware. If you are "
5699 "experiencing problems please contact your Intel or "
5700 "hardware representative who provided you with this "
5701 "hardware.\n");
5702 }
5703 strcpy(netdev->name, "eth%d");
5704 err = register_netdev(netdev);
5705 if (err)
5706 goto err_register;
5707
5708 /* carrier off reporting is important to ethtool even BEFORE open */
5709 netif_carrier_off(netdev);
5710
5711 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
5712 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
5713 INIT_WORK(&adapter->fdir_reinit_task, ixgbe_fdir_reinit_task);
5714
5715 #ifdef CONFIG_IXGBE_DCA
5716 if (dca_add_requester(&pdev->dev) == 0) {
5717 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
5718 ixgbe_setup_dca(adapter);
5719 }
5720 #endif
5721 /* add san mac addr to netdev */
5722 ixgbe_add_sanmac_netdev(netdev);
5723
5724 dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
5725 cards_found++;
5726 return 0;
5727
5728 err_register:
5729 ixgbe_release_hw_control(adapter);
5730 ixgbe_clear_interrupt_scheme(adapter);
5731 err_sw_init:
5732 err_eeprom:
5733 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5734 del_timer_sync(&adapter->sfp_timer);
5735 cancel_work_sync(&adapter->sfp_task);
5736 cancel_work_sync(&adapter->multispeed_fiber_task);
5737 cancel_work_sync(&adapter->sfp_config_module_task);
5738 iounmap(hw->hw_addr);
5739 err_ioremap:
5740 free_netdev(netdev);
5741 err_alloc_etherdev:
5742 pci_release_selected_regions(pdev, pci_select_bars(pdev,
5743 IORESOURCE_MEM));
5744 err_pci_reg:
5745 err_dma:
5746 pci_disable_device(pdev);
5747 return err;
5748 }
5749
5750 /**
5751 * ixgbe_remove - Device Removal Routine
5752 * @pdev: PCI device information struct
5753 *
5754 * ixgbe_remove is called by the PCI subsystem to alert the driver
5755 * that it should release a PCI device. The could be caused by a
5756 * Hot-Plug event, or because the driver is going to be removed from
5757 * memory.
5758 **/
5759 static void __devexit ixgbe_remove(struct pci_dev *pdev)
5760 {
5761 struct net_device *netdev = pci_get_drvdata(pdev);
5762 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5763 int err;
5764
5765 set_bit(__IXGBE_DOWN, &adapter->state);
5766 /* clear the module not found bit to make sure the worker won't
5767 * reschedule
5768 */
5769 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5770 del_timer_sync(&adapter->watchdog_timer);
5771
5772 del_timer_sync(&adapter->sfp_timer);
5773 cancel_work_sync(&adapter->watchdog_task);
5774 cancel_work_sync(&adapter->sfp_task);
5775 cancel_work_sync(&adapter->multispeed_fiber_task);
5776 cancel_work_sync(&adapter->sfp_config_module_task);
5777 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
5778 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
5779 cancel_work_sync(&adapter->fdir_reinit_task);
5780 flush_scheduled_work();
5781
5782 #ifdef CONFIG_IXGBE_DCA
5783 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
5784 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
5785 dca_remove_requester(&pdev->dev);
5786 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
5787 }
5788
5789 #endif
5790 #ifdef IXGBE_FCOE
5791 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
5792 ixgbe_cleanup_fcoe(adapter);
5793
5794 #endif /* IXGBE_FCOE */
5795
5796 /* remove the added san mac */
5797 ixgbe_del_sanmac_netdev(netdev);
5798
5799 if (netdev->reg_state == NETREG_REGISTERED)
5800 unregister_netdev(netdev);
5801
5802 ixgbe_clear_interrupt_scheme(adapter);
5803
5804 ixgbe_release_hw_control(adapter);
5805
5806 iounmap(adapter->hw.hw_addr);
5807 pci_release_selected_regions(pdev, pci_select_bars(pdev,
5808 IORESOURCE_MEM));
5809
5810 DPRINTK(PROBE, INFO, "complete\n");
5811
5812 free_netdev(netdev);
5813
5814 err = pci_disable_pcie_error_reporting(pdev);
5815 if (err)
5816 dev_err(&pdev->dev,
5817 "pci_disable_pcie_error_reporting failed 0x%x\n", err);
5818
5819 pci_disable_device(pdev);
5820 }
5821
5822 /**
5823 * ixgbe_io_error_detected - called when PCI error is detected
5824 * @pdev: Pointer to PCI device
5825 * @state: The current pci connection state
5826 *
5827 * This function is called after a PCI bus error affecting
5828 * this device has been detected.
5829 */
5830 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
5831 pci_channel_state_t state)
5832 {
5833 struct net_device *netdev = pci_get_drvdata(pdev);
5834 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5835
5836 netif_device_detach(netdev);
5837
5838 if (state == pci_channel_io_perm_failure)
5839 return PCI_ERS_RESULT_DISCONNECT;
5840
5841 if (netif_running(netdev))
5842 ixgbe_down(adapter);
5843 pci_disable_device(pdev);
5844
5845 /* Request a slot reset. */
5846 return PCI_ERS_RESULT_NEED_RESET;
5847 }
5848
5849 /**
5850 * ixgbe_io_slot_reset - called after the pci bus has been reset.
5851 * @pdev: Pointer to PCI device
5852 *
5853 * Restart the card from scratch, as if from a cold-boot.
5854 */
5855 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
5856 {
5857 struct net_device *netdev = pci_get_drvdata(pdev);
5858 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5859 pci_ers_result_t result;
5860 int err;
5861
5862 if (pci_enable_device_mem(pdev)) {
5863 DPRINTK(PROBE, ERR,
5864 "Cannot re-enable PCI device after reset.\n");
5865 result = PCI_ERS_RESULT_DISCONNECT;
5866 } else {
5867 pci_set_master(pdev);
5868 pci_restore_state(pdev);
5869
5870 pci_wake_from_d3(pdev, false);
5871
5872 ixgbe_reset(adapter);
5873 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5874 result = PCI_ERS_RESULT_RECOVERED;
5875 }
5876
5877 err = pci_cleanup_aer_uncorrect_error_status(pdev);
5878 if (err) {
5879 dev_err(&pdev->dev,
5880 "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n", err);
5881 /* non-fatal, continue */
5882 }
5883
5884 return result;
5885 }
5886
5887 /**
5888 * ixgbe_io_resume - called when traffic can start flowing again.
5889 * @pdev: Pointer to PCI device
5890 *
5891 * This callback is called when the error recovery driver tells us that
5892 * its OK to resume normal operation.
5893 */
5894 static void ixgbe_io_resume(struct pci_dev *pdev)
5895 {
5896 struct net_device *netdev = pci_get_drvdata(pdev);
5897 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5898
5899 if (netif_running(netdev)) {
5900 if (ixgbe_up(adapter)) {
5901 DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
5902 return;
5903 }
5904 }
5905
5906 netif_device_attach(netdev);
5907 }
5908
5909 static struct pci_error_handlers ixgbe_err_handler = {
5910 .error_detected = ixgbe_io_error_detected,
5911 .slot_reset = ixgbe_io_slot_reset,
5912 .resume = ixgbe_io_resume,
5913 };
5914
5915 static struct pci_driver ixgbe_driver = {
5916 .name = ixgbe_driver_name,
5917 .id_table = ixgbe_pci_tbl,
5918 .probe = ixgbe_probe,
5919 .remove = __devexit_p(ixgbe_remove),
5920 #ifdef CONFIG_PM
5921 .suspend = ixgbe_suspend,
5922 .resume = ixgbe_resume,
5923 #endif
5924 .shutdown = ixgbe_shutdown,
5925 .err_handler = &ixgbe_err_handler
5926 };
5927
5928 /**
5929 * ixgbe_init_module - Driver Registration Routine
5930 *
5931 * ixgbe_init_module is the first routine called when the driver is
5932 * loaded. All it does is register with the PCI subsystem.
5933 **/
5934 static int __init ixgbe_init_module(void)
5935 {
5936 int ret;
5937 printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
5938 ixgbe_driver_string, ixgbe_driver_version);
5939
5940 printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
5941
5942 #ifdef CONFIG_IXGBE_DCA
5943 dca_register_notify(&dca_notifier);
5944 #endif
5945
5946 ret = pci_register_driver(&ixgbe_driver);
5947 return ret;
5948 }
5949
5950 module_init(ixgbe_init_module);
5951
5952 /**
5953 * ixgbe_exit_module - Driver Exit Cleanup Routine
5954 *
5955 * ixgbe_exit_module is called just before the driver is removed
5956 * from memory.
5957 **/
5958 static void __exit ixgbe_exit_module(void)
5959 {
5960 #ifdef CONFIG_IXGBE_DCA
5961 dca_unregister_notify(&dca_notifier);
5962 #endif
5963 pci_unregister_driver(&ixgbe_driver);
5964 }
5965
5966 #ifdef CONFIG_IXGBE_DCA
5967 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
5968 void *p)
5969 {
5970 int ret_val;
5971
5972 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
5973 __ixgbe_notify_dca);
5974
5975 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
5976 }
5977
5978 #endif /* CONFIG_IXGBE_DCA */
5979 #ifdef DEBUG
5980 /**
5981 * ixgbe_get_hw_dev_name - return device name string
5982 * used by hardware layer to print debugging information
5983 **/
5984 char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw)
5985 {
5986 struct ixgbe_adapter *adapter = hw->back;
5987 return adapter->netdev->name;
5988 }
5989
5990 #endif
5991 module_exit(ixgbe_exit_module);
5992
5993 /* ixgbe_main.c */
Linux kernel - Deliverables
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