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ixgbe: update to latest common code module
[linux-2.6/mini2440.git] / drivers / net / ixgbe / ixgbe_main.c
blobdf093ec830de3001656869affacd0d2b518ff515
1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2007 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 Linux NICS <linux.nics@intel.com>
24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26
27 *******************************************************************************/
28
29 #include <linux/types.h>
30 #include <linux/module.h>
31 #include <linux/pci.h>
32 #include <linux/netdevice.h>
33 #include <linux/vmalloc.h>
34 #include <linux/string.h>
35 #include <linux/in.h>
36 #include <linux/ip.h>
37 #include <linux/tcp.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
44 #include "ixgbe.h"
45 #include "ixgbe_common.h"
46
47 char ixgbe_driver_name[] = "ixgbe";
48 static const char ixgbe_driver_string[] =
49 "Intel(R) 10 Gigabit PCI Express Network Driver";
50
51 #define DRV_VERSION "1.3.18-k4"
52 const char ixgbe_driver_version[] = DRV_VERSION;
53 static const char ixgbe_copyright[] =
54 "Copyright (c) 1999-2007 Intel Corporation.";
55
56 static const struct ixgbe_info *ixgbe_info_tbl[] = {
57 [board_82598] = &ixgbe_82598_info,
58 };
59
60 /* ixgbe_pci_tbl - PCI Device ID Table
61 *
62 * Wildcard entries (PCI_ANY_ID) should come last
63 * Last entry must be all 0s
64 *
65 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
66 * Class, Class Mask, private data (not used) }
67 */
68 static struct pci_device_id ixgbe_pci_tbl[] = {
69 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
70 board_82598 },
71 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
72 board_82598 },
73 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
74 board_82598 },
75 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT),
76 board_82598 },
77 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR),
78 board_82598 },
79
80 /* required last entry */
81 {0, }
82 };
83 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
84
85 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
86 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
87 void *p);
88 static struct notifier_block dca_notifier = {
89 .notifier_call = ixgbe_notify_dca,
90 .next = NULL,
91 .priority = 0
92 };
93 #endif
94
95 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
96 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
97 MODULE_LICENSE("GPL");
98 MODULE_VERSION(DRV_VERSION);
99
100 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
101
102 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
103 {
104 u32 ctrl_ext;
105
106 /* Let firmware take over control of h/w */
107 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
108 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
109 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
110 }
111
112 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
113 {
114 u32 ctrl_ext;
115
116 /* Let firmware know the driver has taken over */
117 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
118 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
119 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
120 }
121
122 #ifdef DEBUG
123 /**
124 * ixgbe_get_hw_dev_name - return device name string
125 * used by hardware layer to print debugging information
126 **/
127 char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw)
128 {
129 struct ixgbe_adapter *adapter = hw->back;
130 struct net_device *netdev = adapter->netdev;
131 return netdev->name;
132 }
133 #endif
134
135 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, u16 int_alloc_entry,
136 u8 msix_vector)
137 {
138 u32 ivar, index;
139
140 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
141 index = (int_alloc_entry >> 2) & 0x1F;
142 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR(index));
143 ivar &= ~(0xFF << (8 * (int_alloc_entry & 0x3)));
144 ivar |= (msix_vector << (8 * (int_alloc_entry & 0x3)));
145 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR(index), ivar);
146 }
147
148 static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
149 struct ixgbe_tx_buffer
150 *tx_buffer_info)
151 {
152 if (tx_buffer_info->dma) {
153 pci_unmap_page(adapter->pdev, tx_buffer_info->dma,
154 tx_buffer_info->length, PCI_DMA_TODEVICE);
155 tx_buffer_info->dma = 0;
156 }
157 if (tx_buffer_info->skb) {
158 dev_kfree_skb_any(tx_buffer_info->skb);
159 tx_buffer_info->skb = NULL;
160 }
161 /* tx_buffer_info must be completely set up in the transmit path */
162 }
163
164 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
165 struct ixgbe_ring *tx_ring,
166 unsigned int eop)
167 {
168 struct ixgbe_hw *hw = &adapter->hw;
169 u32 head, tail;
170
171 /* Detect a transmit hang in hardware, this serializes the
172 * check with the clearing of time_stamp and movement of eop */
173 head = IXGBE_READ_REG(hw, tx_ring->head);
174 tail = IXGBE_READ_REG(hw, tx_ring->tail);
175 adapter->detect_tx_hung = false;
176 if ((head != tail) &&
177 tx_ring->tx_buffer_info[eop].time_stamp &&
178 time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
179 !(IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & IXGBE_TFCS_TXOFF)) {
180 /* detected Tx unit hang */
181 union ixgbe_adv_tx_desc *tx_desc;
182 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
183 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
184 " Tx Queue <%d>\n"
185 " TDH, TDT <%x>, <%x>\n"
186 " next_to_use <%x>\n"
187 " next_to_clean <%x>\n"
188 "tx_buffer_info[next_to_clean]\n"
189 " time_stamp <%lx>\n"
190 " jiffies <%lx>\n",
191 tx_ring->queue_index,
192 head, tail,
193 tx_ring->next_to_use, eop,
194 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
195 return true;
196 }
197
198 return false;
199 }
200
201 #define IXGBE_MAX_TXD_PWR 14
202 #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
203
204 /* Tx Descriptors needed, worst case */
205 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
206 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
207 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
208 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
209
210 #define GET_TX_HEAD_FROM_RING(ring) (\
211 *(volatile u32 *) \
212 ((union ixgbe_adv_tx_desc *)(ring)->desc + (ring)->count))
213 static void ixgbe_tx_timeout(struct net_device *netdev);
214
215 /**
216 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
217 * @adapter: board private structure
218 * @tx_ring: tx ring to clean
219 **/
220 static bool ixgbe_clean_tx_irq(struct ixgbe_adapter *adapter,
221 struct ixgbe_ring *tx_ring)
222 {
223 union ixgbe_adv_tx_desc *tx_desc;
224 struct ixgbe_tx_buffer *tx_buffer_info;
225 struct net_device *netdev = adapter->netdev;
226 struct sk_buff *skb;
227 unsigned int i;
228 u32 head, oldhead;
229 unsigned int count = 0;
230 unsigned int total_bytes = 0, total_packets = 0;
231
232 rmb();
233 head = GET_TX_HEAD_FROM_RING(tx_ring);
234 head = le32_to_cpu(head);
235 i = tx_ring->next_to_clean;
236 while (1) {
237 while (i != head) {
238 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
239 tx_buffer_info = &tx_ring->tx_buffer_info[i];
240 skb = tx_buffer_info->skb;
241
242 if (skb) {
243 unsigned int segs, bytecount;
244
245 /* gso_segs is currently only valid for tcp */
246 segs = skb_shinfo(skb)->gso_segs ?: 1;
247 /* multiply data chunks by size of headers */
248 bytecount = ((segs - 1) * skb_headlen(skb)) +
249 skb->len;
250 total_packets += segs;
251 total_bytes += bytecount;
252 }
253
254 ixgbe_unmap_and_free_tx_resource(adapter,
255 tx_buffer_info);
256
257 i++;
258 if (i == tx_ring->count)
259 i = 0;
260
261 count++;
262 if (count == tx_ring->count)
263 goto done_cleaning;
264 }
265 oldhead = head;
266 rmb();
267 head = GET_TX_HEAD_FROM_RING(tx_ring);
268 head = le32_to_cpu(head);
269 if (head == oldhead)
270 goto done_cleaning;
271 } /* while (1) */
272
273 done_cleaning:
274 tx_ring->next_to_clean = i;
275
276 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
277 if (unlikely(count && netif_carrier_ok(netdev) &&
278 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
279 /* Make sure that anybody stopping the queue after this
280 * sees the new next_to_clean.
281 */
282 smp_mb();
283 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
284 !test_bit(__IXGBE_DOWN, &adapter->state)) {
285 netif_wake_subqueue(netdev, tx_ring->queue_index);
286 ++adapter->restart_queue;
287 }
288 }
289
290 if (adapter->detect_tx_hung) {
291 if (ixgbe_check_tx_hang(adapter, tx_ring, i)) {
292 /* schedule immediate reset if we believe we hung */
293 DPRINTK(PROBE, INFO,
294 "tx hang %d detected, resetting adapter\n",
295 adapter->tx_timeout_count + 1);
296 ixgbe_tx_timeout(adapter->netdev);
297 }
298 }
299
300 /* re-arm the interrupt */
301 if ((total_packets >= tx_ring->work_limit) ||
302 (count == tx_ring->count))
303 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, tx_ring->v_idx);
304
305 tx_ring->total_bytes += total_bytes;
306 tx_ring->total_packets += total_packets;
307 tx_ring->stats.bytes += total_bytes;
308 tx_ring->stats.packets += total_packets;
309 adapter->net_stats.tx_bytes += total_bytes;
310 adapter->net_stats.tx_packets += total_packets;
311 return (total_packets ? true : false);
312 }
313
314 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
315 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
316 struct ixgbe_ring *rx_ring)
317 {
318 u32 rxctrl;
319 int cpu = get_cpu();
320 int q = rx_ring - adapter->rx_ring;
321
322 if (rx_ring->cpu != cpu) {
323 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
324 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
325 rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
326 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
327 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
328 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
329 rx_ring->cpu = cpu;
330 }
331 put_cpu();
332 }
333
334 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
335 struct ixgbe_ring *tx_ring)
336 {
337 u32 txctrl;
338 int cpu = get_cpu();
339 int q = tx_ring - adapter->tx_ring;
340
341 if (tx_ring->cpu != cpu) {
342 txctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q));
343 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
344 txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
345 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
346 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q), txctrl);
347 tx_ring->cpu = cpu;
348 }
349 put_cpu();
350 }
351
352 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
353 {
354 int i;
355
356 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
357 return;
358
359 for (i = 0; i < adapter->num_tx_queues; i++) {
360 adapter->tx_ring[i].cpu = -1;
361 ixgbe_update_tx_dca(adapter, &adapter->tx_ring[i]);
362 }
363 for (i = 0; i < adapter->num_rx_queues; i++) {
364 adapter->rx_ring[i].cpu = -1;
365 ixgbe_update_rx_dca(adapter, &adapter->rx_ring[i]);
366 }
367 }
368
369 static int __ixgbe_notify_dca(struct device *dev, void *data)
370 {
371 struct net_device *netdev = dev_get_drvdata(dev);
372 struct ixgbe_adapter *adapter = netdev_priv(netdev);
373 unsigned long event = *(unsigned long *)data;
374
375 switch (event) {
376 case DCA_PROVIDER_ADD:
377 /* if we're already enabled, don't do it again */
378 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
379 break;
380 /* Always use CB2 mode, difference is masked
381 * in the CB driver. */
382 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
383 if (dca_add_requester(dev) == 0) {
384 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
385 ixgbe_setup_dca(adapter);
386 break;
387 }
388 /* Fall Through since DCA is disabled. */
389 case DCA_PROVIDER_REMOVE:
390 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
391 dca_remove_requester(dev);
392 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
393 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
394 }
395 break;
396 }
397
398 return 0;
399 }
400
401 #endif /* CONFIG_DCA or CONFIG_DCA_MODULE */
402 /**
403 * ixgbe_receive_skb - Send a completed packet up the stack
404 * @adapter: board private structure
405 * @skb: packet to send up
406 * @status: hardware indication of status of receive
407 * @rx_ring: rx descriptor ring (for a specific queue) to setup
408 * @rx_desc: rx descriptor
409 **/
410 static void ixgbe_receive_skb(struct ixgbe_adapter *adapter,
411 struct sk_buff *skb, u8 status,
412 struct ixgbe_ring *ring,
413 union ixgbe_adv_rx_desc *rx_desc)
414 {
415 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
416 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
417
418 if (adapter->netdev->features & NETIF_F_LRO &&
419 skb->ip_summed == CHECKSUM_UNNECESSARY) {
420 if (adapter->vlgrp && is_vlan)
421 lro_vlan_hwaccel_receive_skb(&ring->lro_mgr, skb,
422 adapter->vlgrp, tag,
423 rx_desc);
424 else
425 lro_receive_skb(&ring->lro_mgr, skb, rx_desc);
426 ring->lro_used = true;
427 } else {
428 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
429 if (adapter->vlgrp && is_vlan)
430 vlan_hwaccel_receive_skb(skb, adapter->vlgrp, tag);
431 else
432 netif_receive_skb(skb);
433 } else {
434 if (adapter->vlgrp && is_vlan)
435 vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
436 else
437 netif_rx(skb);
438 }
439 }
440 }
441
442 /**
443 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
444 * @adapter: address of board private structure
445 * @status_err: hardware indication of status of receive
446 * @skb: skb currently being received and modified
447 **/
448 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
449 u32 status_err, struct sk_buff *skb)
450 {
451 skb->ip_summed = CHECKSUM_NONE;
452
453 /* Rx csum disabled */
454 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
455 return;
456
457 /* if IP and error */
458 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
459 (status_err & IXGBE_RXDADV_ERR_IPE)) {
460 adapter->hw_csum_rx_error++;
461 return;
462 }
463
464 if (!(status_err & IXGBE_RXD_STAT_L4CS))
465 return;
466
467 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
468 adapter->hw_csum_rx_error++;
469 return;
470 }
471
472 /* It must be a TCP or UDP packet with a valid checksum */
473 skb->ip_summed = CHECKSUM_UNNECESSARY;
474 adapter->hw_csum_rx_good++;
475 }
476
477 /**
478 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
479 * @adapter: address of board private structure
480 **/
481 static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
482 struct ixgbe_ring *rx_ring,
483 int cleaned_count)
484 {
485 struct net_device *netdev = adapter->netdev;
486 struct pci_dev *pdev = adapter->pdev;
487 union ixgbe_adv_rx_desc *rx_desc;
488 struct ixgbe_rx_buffer *bi;
489 unsigned int i;
490 unsigned int bufsz = rx_ring->rx_buf_len + NET_IP_ALIGN;
491
492 i = rx_ring->next_to_use;
493 bi = &rx_ring->rx_buffer_info[i];
494
495 while (cleaned_count--) {
496 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
497
498 if (!bi->page_dma &&
499 (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) {
500 if (!bi->page) {
501 bi->page = alloc_page(GFP_ATOMIC);
502 if (!bi->page) {
503 adapter->alloc_rx_page_failed++;
504 goto no_buffers;
505 }
506 bi->page_offset = 0;
507 } else {
508 /* use a half page if we're re-using */
509 bi->page_offset ^= (PAGE_SIZE / 2);
510 }
511
512 bi->page_dma = pci_map_page(pdev, bi->page,
513 bi->page_offset,
514 (PAGE_SIZE / 2),
515 PCI_DMA_FROMDEVICE);
516 }
517
518 if (!bi->skb) {
519 struct sk_buff *skb = netdev_alloc_skb(netdev, bufsz);
520
521 if (!skb) {
522 adapter->alloc_rx_buff_failed++;
523 goto no_buffers;
524 }
525
526 /*
527 * Make buffer alignment 2 beyond a 16 byte boundary
528 * this will result in a 16 byte aligned IP header after
529 * the 14 byte MAC header is removed
530 */
531 skb_reserve(skb, NET_IP_ALIGN);
532
533 bi->skb = skb;
534 bi->dma = pci_map_single(pdev, skb->data, bufsz,
535 PCI_DMA_FROMDEVICE);
536 }
537 /* Refresh the desc even if buffer_addrs didn't change because
538 * each write-back erases this info. */
539 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
540 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
541 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
542 } else {
543 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
544 }
545
546 i++;
547 if (i == rx_ring->count)
548 i = 0;
549 bi = &rx_ring->rx_buffer_info[i];
550 }
551
552 no_buffers:
553 if (rx_ring->next_to_use != i) {
554 rx_ring->next_to_use = i;
555 if (i-- == 0)
556 i = (rx_ring->count - 1);
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 writel(i, adapter->hw.hw_addr + rx_ring->tail);
566 }
567 }
568
569 static inline u16 ixgbe_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
570 {
571 return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
572 }
573
574 static inline u16 ixgbe_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
575 {
576 return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
577 }
578
579 static bool ixgbe_clean_rx_irq(struct ixgbe_adapter *adapter,
580 struct ixgbe_ring *rx_ring,
581 int *work_done, int work_to_do)
582 {
583 struct net_device *netdev = adapter->netdev;
584 struct pci_dev *pdev = adapter->pdev;
585 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
586 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
587 struct sk_buff *skb;
588 unsigned int i;
589 u32 len, staterr;
590 u16 hdr_info;
591 bool cleaned = false;
592 int cleaned_count = 0;
593 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
594
595 i = rx_ring->next_to_clean;
596 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
597 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
598 rx_buffer_info = &rx_ring->rx_buffer_info[i];
599
600 while (staterr & IXGBE_RXD_STAT_DD) {
601 u32 upper_len = 0;
602 if (*work_done >= work_to_do)
603 break;
604 (*work_done)++;
605
606 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
607 hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
608 len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
609 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
610 if (hdr_info & IXGBE_RXDADV_SPH)
611 adapter->rx_hdr_split++;
612 if (len > IXGBE_RX_HDR_SIZE)
613 len = IXGBE_RX_HDR_SIZE;
614 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
615 } else {
616 len = le16_to_cpu(rx_desc->wb.upper.length);
617 }
618
619 cleaned = true;
620 skb = rx_buffer_info->skb;
621 prefetch(skb->data - NET_IP_ALIGN);
622 rx_buffer_info->skb = NULL;
623
624 if (len && !skb_shinfo(skb)->nr_frags) {
625 pci_unmap_single(pdev, rx_buffer_info->dma,
626 rx_ring->rx_buf_len + NET_IP_ALIGN,
627 PCI_DMA_FROMDEVICE);
628 skb_put(skb, len);
629 }
630
631 if (upper_len) {
632 pci_unmap_page(pdev, rx_buffer_info->page_dma,
633 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
634 rx_buffer_info->page_dma = 0;
635 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
636 rx_buffer_info->page,
637 rx_buffer_info->page_offset,
638 upper_len);
639
640 if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
641 (page_count(rx_buffer_info->page) != 1))
642 rx_buffer_info->page = NULL;
643 else
644 get_page(rx_buffer_info->page);
645
646 skb->len += upper_len;
647 skb->data_len += upper_len;
648 skb->truesize += upper_len;
649 }
650
651 i++;
652 if (i == rx_ring->count)
653 i = 0;
654 next_buffer = &rx_ring->rx_buffer_info[i];
655
656 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
657 prefetch(next_rxd);
658
659 cleaned_count++;
660 if (staterr & IXGBE_RXD_STAT_EOP) {
661 rx_ring->stats.packets++;
662 rx_ring->stats.bytes += skb->len;
663 } else {
664 rx_buffer_info->skb = next_buffer->skb;
665 rx_buffer_info->dma = next_buffer->dma;
666 next_buffer->skb = skb;
667 next_buffer->dma = 0;
668 adapter->non_eop_descs++;
669 goto next_desc;
670 }
671
672 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
673 dev_kfree_skb_irq(skb);
674 goto next_desc;
675 }
676
677 ixgbe_rx_checksum(adapter, staterr, skb);
678
679 /* probably a little skewed due to removing CRC */
680 total_rx_bytes += skb->len;
681 total_rx_packets++;
682
683 skb->protocol = eth_type_trans(skb, netdev);
684 ixgbe_receive_skb(adapter, skb, staterr, rx_ring, rx_desc);
685 netdev->last_rx = jiffies;
686
687 next_desc:
688 rx_desc->wb.upper.status_error = 0;
689
690 /* return some buffers to hardware, one at a time is too slow */
691 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
692 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
693 cleaned_count = 0;
694 }
695
696 /* use prefetched values */
697 rx_desc = next_rxd;
698 rx_buffer_info = next_buffer;
699
700 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
701 }
702
703 if (rx_ring->lro_used) {
704 lro_flush_all(&rx_ring->lro_mgr);
705 rx_ring->lro_used = false;
706 }
707
708 rx_ring->next_to_clean = i;
709 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
710
711 if (cleaned_count)
712 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
713
714 rx_ring->total_packets += total_rx_packets;
715 rx_ring->total_bytes += total_rx_bytes;
716 adapter->net_stats.rx_bytes += total_rx_bytes;
717 adapter->net_stats.rx_packets += total_rx_packets;
718
719 return cleaned;
720 }
721
722 static int ixgbe_clean_rxonly(struct napi_struct *, int);
723 /**
724 * ixgbe_configure_msix - Configure MSI-X hardware
725 * @adapter: board private structure
726 *
727 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
728 * interrupts.
729 **/
730 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
731 {
732 struct ixgbe_q_vector *q_vector;
733 int i, j, q_vectors, v_idx, r_idx;
734 u32 mask;
735
736 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
737
738 /* Populate the IVAR table and set the ITR values to the
739 * corresponding register.
740 */
741 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
742 q_vector = &adapter->q_vector[v_idx];
743 /* XXX for_each_bit(...) */
744 r_idx = find_first_bit(q_vector->rxr_idx,
745 adapter->num_rx_queues);
746
747 for (i = 0; i < q_vector->rxr_count; i++) {
748 j = adapter->rx_ring[r_idx].reg_idx;
749 ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(j), v_idx);
750 r_idx = find_next_bit(q_vector->rxr_idx,
751 adapter->num_rx_queues,
752 r_idx + 1);
753 }
754 r_idx = find_first_bit(q_vector->txr_idx,
755 adapter->num_tx_queues);
756
757 for (i = 0; i < q_vector->txr_count; i++) {
758 j = adapter->tx_ring[r_idx].reg_idx;
759 ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(j), v_idx);
760 r_idx = find_next_bit(q_vector->txr_idx,
761 adapter->num_tx_queues,
762 r_idx + 1);
763 }
764
765 /* if this is a tx only vector halve the interrupt rate */
766 if (q_vector->txr_count && !q_vector->rxr_count)
767 q_vector->eitr = (adapter->eitr_param >> 1);
768 else
769 /* rx only */
770 q_vector->eitr = adapter->eitr_param;
771
772 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx),
773 EITR_INTS_PER_SEC_TO_REG(q_vector->eitr));
774 }
775
776 ixgbe_set_ivar(adapter, IXGBE_IVAR_OTHER_CAUSES_INDEX, v_idx);
777 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
778
779 /* set up to autoclear timer, and the vectors */
780 mask = IXGBE_EIMS_ENABLE_MASK;
781 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
782 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
783 }
784
785 enum latency_range {
786 lowest_latency = 0,
787 low_latency = 1,
788 bulk_latency = 2,
789 latency_invalid = 255
790 };
791
792 /**
793 * ixgbe_update_itr - update the dynamic ITR value based on statistics
794 * @adapter: pointer to adapter
795 * @eitr: eitr setting (ints per sec) to give last timeslice
796 * @itr_setting: current throttle rate in ints/second
797 * @packets: the number of packets during this measurement interval
798 * @bytes: the number of bytes during this measurement interval
799 *
800 * Stores a new ITR value based on packets and byte
801 * counts during the last interrupt. The advantage of per interrupt
802 * computation is faster updates and more accurate ITR for the current
803 * traffic pattern. Constants in this function were computed
804 * based on theoretical maximum wire speed and thresholds were set based
805 * on testing data as well as attempting to minimize response time
806 * while increasing bulk throughput.
807 * this functionality is controlled by the InterruptThrottleRate module
808 * parameter (see ixgbe_param.c)
809 **/
810 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
811 u32 eitr, u8 itr_setting,
812 int packets, int bytes)
813 {
814 unsigned int retval = itr_setting;
815 u32 timepassed_us;
816 u64 bytes_perint;
817
818 if (packets == 0)
819 goto update_itr_done;
820
821
822 /* simple throttlerate management
823 * 0-20MB/s lowest (100000 ints/s)
824 * 20-100MB/s low (20000 ints/s)
825 * 100-1249MB/s bulk (8000 ints/s)
826 */
827 /* what was last interrupt timeslice? */
828 timepassed_us = 1000000/eitr;
829 bytes_perint = bytes / timepassed_us; /* bytes/usec */
830
831 switch (itr_setting) {
832 case lowest_latency:
833 if (bytes_perint > adapter->eitr_low)
834 retval = low_latency;
835 break;
836 case low_latency:
837 if (bytes_perint > adapter->eitr_high)
838 retval = bulk_latency;
839 else if (bytes_perint <= adapter->eitr_low)
840 retval = lowest_latency;
841 break;
842 case bulk_latency:
843 if (bytes_perint <= adapter->eitr_high)
844 retval = low_latency;
845 break;
846 }
847
848 update_itr_done:
849 return retval;
850 }
851
852 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
853 {
854 struct ixgbe_adapter *adapter = q_vector->adapter;
855 struct ixgbe_hw *hw = &adapter->hw;
856 u32 new_itr;
857 u8 current_itr, ret_itr;
858 int i, r_idx, v_idx = ((void *)q_vector - (void *)(adapter->q_vector)) /
859 sizeof(struct ixgbe_q_vector);
860 struct ixgbe_ring *rx_ring, *tx_ring;
861
862 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
863 for (i = 0; i < q_vector->txr_count; i++) {
864 tx_ring = &(adapter->tx_ring[r_idx]);
865 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
866 q_vector->tx_itr,
867 tx_ring->total_packets,
868 tx_ring->total_bytes);
869 /* if the result for this queue would decrease interrupt
870 * rate for this vector then use that result */
871 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
872 q_vector->tx_itr - 1 : ret_itr);
873 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
874 r_idx + 1);
875 }
876
877 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
878 for (i = 0; i < q_vector->rxr_count; i++) {
879 rx_ring = &(adapter->rx_ring[r_idx]);
880 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
881 q_vector->rx_itr,
882 rx_ring->total_packets,
883 rx_ring->total_bytes);
884 /* if the result for this queue would decrease interrupt
885 * rate for this vector then use that result */
886 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
887 q_vector->rx_itr - 1 : ret_itr);
888 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
889 r_idx + 1);
890 }
891
892 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
893
894 switch (current_itr) {
895 /* counts and packets in update_itr are dependent on these numbers */
896 case lowest_latency:
897 new_itr = 100000;
898 break;
899 case low_latency:
900 new_itr = 20000; /* aka hwitr = ~200 */
901 break;
902 case bulk_latency:
903 default:
904 new_itr = 8000;
905 break;
906 }
907
908 if (new_itr != q_vector->eitr) {
909 u32 itr_reg;
910 /* do an exponential smoothing */
911 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
912 q_vector->eitr = new_itr;
913 itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr);
914 /* must write high and low 16 bits to reset counter */
915 DPRINTK(TX_ERR, DEBUG, "writing eitr(%d): %08X\n", v_idx,
916 itr_reg);
917 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg | (itr_reg)<<16);
918 }
919
920 return;
921 }
922
923
924 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
925 {
926 struct ixgbe_hw *hw = &adapter->hw;
927
928 adapter->lsc_int++;
929 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
930 adapter->link_check_timeout = jiffies;
931 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
932 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
933 schedule_work(&adapter->watchdog_task);
934 }
935 }
936
937 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
938 {
939 struct net_device *netdev = data;
940 struct ixgbe_adapter *adapter = netdev_priv(netdev);
941 struct ixgbe_hw *hw = &adapter->hw;
942 u32 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
943
944 if (eicr & IXGBE_EICR_LSC)
945 ixgbe_check_lsc(adapter);
946
947 if (!test_bit(__IXGBE_DOWN, &adapter->state))
948 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
949
950 return IRQ_HANDLED;
951 }
952
953 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
954 {
955 struct ixgbe_q_vector *q_vector = data;
956 struct ixgbe_adapter *adapter = q_vector->adapter;
957 struct ixgbe_ring *tx_ring;
958 int i, r_idx;
959
960 if (!q_vector->txr_count)
961 return IRQ_HANDLED;
962
963 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
964 for (i = 0; i < q_vector->txr_count; i++) {
965 tx_ring = &(adapter->tx_ring[r_idx]);
966 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
967 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
968 ixgbe_update_tx_dca(adapter, tx_ring);
969 #endif
970 tx_ring->total_bytes = 0;
971 tx_ring->total_packets = 0;
972 ixgbe_clean_tx_irq(adapter, tx_ring);
973 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
974 r_idx + 1);
975 }
976
977 return IRQ_HANDLED;
978 }
979
980 /**
981 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
982 * @irq: unused
983 * @data: pointer to our q_vector struct for this interrupt vector
984 **/
985 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
986 {
987 struct ixgbe_q_vector *q_vector = data;
988 struct ixgbe_adapter *adapter = q_vector->adapter;
989 struct ixgbe_ring *rx_ring;
990 int r_idx;
991 int i;
992
993 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
994 for (i = 0; i < q_vector->rxr_count; i++) {
995 rx_ring = &(adapter->rx_ring[r_idx]);
996 rx_ring->total_bytes = 0;
997 rx_ring->total_packets = 0;
998 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
999 r_idx + 1);
1000 }
1001
1002 if (!q_vector->rxr_count)
1003 return IRQ_HANDLED;
1004
1005 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1006 rx_ring = &(adapter->rx_ring[r_idx]);
1007 /* disable interrupts on this vector only */
1008 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, rx_ring->v_idx);
1009 netif_rx_schedule(adapter->netdev, &q_vector->napi);
1010
1011 return IRQ_HANDLED;
1012 }
1013
1014 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1015 {
1016 ixgbe_msix_clean_rx(irq, data);
1017 ixgbe_msix_clean_tx(irq, data);
1018
1019 return IRQ_HANDLED;
1020 }
1021
1022 /**
1023 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1024 * @napi: napi struct with our devices info in it
1025 * @budget: amount of work driver is allowed to do this pass, in packets
1026 *
1027 * This function is optimized for cleaning one queue only on a single
1028 * q_vector!!!
1029 **/
1030 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1031 {
1032 struct ixgbe_q_vector *q_vector =
1033 container_of(napi, struct ixgbe_q_vector, napi);
1034 struct ixgbe_adapter *adapter = q_vector->adapter;
1035 struct ixgbe_ring *rx_ring = NULL;
1036 int work_done = 0;
1037 long r_idx;
1038
1039 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1040 rx_ring = &(adapter->rx_ring[r_idx]);
1041 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
1042 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1043 ixgbe_update_rx_dca(adapter, rx_ring);
1044 #endif
1045
1046 ixgbe_clean_rx_irq(adapter, rx_ring, &work_done, budget);
1047
1048 /* If all Rx work done, exit the polling mode */
1049 if (work_done < budget) {
1050 netif_rx_complete(adapter->netdev, napi);
1051 if (adapter->itr_setting & 3)
1052 ixgbe_set_itr_msix(q_vector);
1053 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1054 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, rx_ring->v_idx);
1055 }
1056
1057 return work_done;
1058 }
1059
1060 /**
1061 * ixgbe_clean_rxonly_many - msix (aka one shot) rx clean routine
1062 * @napi: napi struct with our devices info in it
1063 * @budget: amount of work driver is allowed to do this pass, in packets
1064 *
1065 * This function will clean more than one rx queue associated with a
1066 * q_vector.
1067 **/
1068 static int ixgbe_clean_rxonly_many(struct napi_struct *napi, int budget)
1069 {
1070 struct ixgbe_q_vector *q_vector =
1071 container_of(napi, struct ixgbe_q_vector, napi);
1072 struct ixgbe_adapter *adapter = q_vector->adapter;
1073 struct net_device *netdev = adapter->netdev;
1074 struct ixgbe_ring *rx_ring = NULL;
1075 int work_done = 0, i;
1076 long r_idx;
1077 u16 enable_mask = 0;
1078
1079 /* attempt to distribute budget to each queue fairly, but don't allow
1080 * the budget to go below 1 because we'll exit polling */
1081 budget /= (q_vector->rxr_count ?: 1);
1082 budget = max(budget, 1);
1083 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1084 for (i = 0; i < q_vector->rxr_count; i++) {
1085 rx_ring = &(adapter->rx_ring[r_idx]);
1086 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
1087 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1088 ixgbe_update_rx_dca(adapter, rx_ring);
1089 #endif
1090 ixgbe_clean_rx_irq(adapter, rx_ring, &work_done, budget);
1091 enable_mask |= rx_ring->v_idx;
1092 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1093 r_idx + 1);
1094 }
1095
1096 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1097 rx_ring = &(adapter->rx_ring[r_idx]);
1098 /* If all Rx work done, exit the polling mode */
1099 if ((work_done == 0) || !netif_running(netdev)) {
1100 netif_rx_complete(netdev, napi);
1101 if (adapter->itr_setting & 3)
1102 ixgbe_set_itr_msix(q_vector);
1103 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1104 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, enable_mask);
1105 return 0;
1106 }
1107
1108 return work_done;
1109 }
1110 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
1111 int r_idx)
1112 {
1113 a->q_vector[v_idx].adapter = a;
1114 set_bit(r_idx, a->q_vector[v_idx].rxr_idx);
1115 a->q_vector[v_idx].rxr_count++;
1116 a->rx_ring[r_idx].v_idx = 1 << v_idx;
1117 }
1118
1119 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
1120 int r_idx)
1121 {
1122 a->q_vector[v_idx].adapter = a;
1123 set_bit(r_idx, a->q_vector[v_idx].txr_idx);
1124 a->q_vector[v_idx].txr_count++;
1125 a->tx_ring[r_idx].v_idx = 1 << v_idx;
1126 }
1127
1128 /**
1129 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
1130 * @adapter: board private structure to initialize
1131 * @vectors: allotted vector count for descriptor rings
1132 *
1133 * This function maps descriptor rings to the queue-specific vectors
1134 * we were allotted through the MSI-X enabling code. Ideally, we'd have
1135 * one vector per ring/queue, but on a constrained vector budget, we
1136 * group the rings as "efficiently" as possible. You would add new
1137 * mapping configurations in here.
1138 **/
1139 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
1140 int vectors)
1141 {
1142 int v_start = 0;
1143 int rxr_idx = 0, txr_idx = 0;
1144 int rxr_remaining = adapter->num_rx_queues;
1145 int txr_remaining = adapter->num_tx_queues;
1146 int i, j;
1147 int rqpv, tqpv;
1148 int err = 0;
1149
1150 /* No mapping required if MSI-X is disabled. */
1151 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1152 goto out;
1153
1154 /*
1155 * The ideal configuration...
1156 * We have enough vectors to map one per queue.
1157 */
1158 if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1159 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1160 map_vector_to_rxq(adapter, v_start, rxr_idx);
1161
1162 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1163 map_vector_to_txq(adapter, v_start, txr_idx);
1164
1165 goto out;
1166 }
1167
1168 /*
1169 * If we don't have enough vectors for a 1-to-1
1170 * mapping, we'll have to group them so there are
1171 * multiple queues per vector.
1172 */
1173 /* Re-adjusting *qpv takes care of the remainder. */
1174 for (i = v_start; i < vectors; i++) {
1175 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
1176 for (j = 0; j < rqpv; j++) {
1177 map_vector_to_rxq(adapter, i, rxr_idx);
1178 rxr_idx++;
1179 rxr_remaining--;
1180 }
1181 }
1182 for (i = v_start; i < vectors; i++) {
1183 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
1184 for (j = 0; j < tqpv; j++) {
1185 map_vector_to_txq(adapter, i, txr_idx);
1186 txr_idx++;
1187 txr_remaining--;
1188 }
1189 }
1190
1191 out:
1192 return err;
1193 }
1194
1195 /**
1196 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
1197 * @adapter: board private structure
1198 *
1199 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
1200 * interrupts from the kernel.
1201 **/
1202 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
1203 {
1204 struct net_device *netdev = adapter->netdev;
1205 irqreturn_t (*handler)(int, void *);
1206 int i, vector, q_vectors, err;
1207
1208 /* Decrement for Other and TCP Timer vectors */
1209 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1210
1211 /* Map the Tx/Rx rings to the vectors we were allotted. */
1212 err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
1213 if (err)
1214 goto out;
1215
1216 #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
1217 (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
1218 &ixgbe_msix_clean_many)
1219 for (vector = 0; vector < q_vectors; vector++) {
1220 handler = SET_HANDLER(&adapter->q_vector[vector]);
1221 sprintf(adapter->name[vector], "%s:v%d-%s",
1222 netdev->name, vector,
1223 (handler == &ixgbe_msix_clean_rx) ? "Rx" :
1224 ((handler == &ixgbe_msix_clean_tx) ? "Tx" : "TxRx"));
1225 err = request_irq(adapter->msix_entries[vector].vector,
1226 handler, 0, adapter->name[vector],
1227 &(adapter->q_vector[vector]));
1228 if (err) {
1229 DPRINTK(PROBE, ERR,
1230 "request_irq failed for MSIX interrupt "
1231 "Error: %d\n", err);
1232 goto free_queue_irqs;
1233 }
1234 }
1235
1236 sprintf(adapter->name[vector], "%s:lsc", netdev->name);
1237 err = request_irq(adapter->msix_entries[vector].vector,
1238 &ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
1239 if (err) {
1240 DPRINTK(PROBE, ERR,
1241 "request_irq for msix_lsc failed: %d\n", err);
1242 goto free_queue_irqs;
1243 }
1244
1245 return 0;
1246
1247 free_queue_irqs:
1248 for (i = vector - 1; i >= 0; i--)
1249 free_irq(adapter->msix_entries[--vector].vector,
1250 &(adapter->q_vector[i]));
1251 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
1252 pci_disable_msix(adapter->pdev);
1253 kfree(adapter->msix_entries);
1254 adapter->msix_entries = NULL;
1255 out:
1256 return err;
1257 }
1258
1259 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
1260 {
1261 struct ixgbe_hw *hw = &adapter->hw;
1262 struct ixgbe_q_vector *q_vector = adapter->q_vector;
1263 u8 current_itr;
1264 u32 new_itr = q_vector->eitr;
1265 struct ixgbe_ring *rx_ring = &adapter->rx_ring[0];
1266 struct ixgbe_ring *tx_ring = &adapter->tx_ring[0];
1267
1268 q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
1269 q_vector->tx_itr,
1270 tx_ring->total_packets,
1271 tx_ring->total_bytes);
1272 q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
1273 q_vector->rx_itr,
1274 rx_ring->total_packets,
1275 rx_ring->total_bytes);
1276
1277 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1278
1279 switch (current_itr) {
1280 /* counts and packets in update_itr are dependent on these numbers */
1281 case lowest_latency:
1282 new_itr = 100000;
1283 break;
1284 case low_latency:
1285 new_itr = 20000; /* aka hwitr = ~200 */
1286 break;
1287 case bulk_latency:
1288 new_itr = 8000;
1289 break;
1290 default:
1291 break;
1292 }
1293
1294 if (new_itr != q_vector->eitr) {
1295 u32 itr_reg;
1296 /* do an exponential smoothing */
1297 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1298 q_vector->eitr = new_itr;
1299 itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr);
1300 /* must write high and low 16 bits to reset counter */
1301 IXGBE_WRITE_REG(hw, IXGBE_EITR(0), itr_reg | (itr_reg)<<16);
1302 }
1303
1304 return;
1305 }
1306
1307 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter);
1308
1309 /**
1310 * ixgbe_intr - legacy mode Interrupt Handler
1311 * @irq: interrupt number
1312 * @data: pointer to a network interface device structure
1313 * @pt_regs: CPU registers structure
1314 **/
1315 static irqreturn_t ixgbe_intr(int irq, void *data)
1316 {
1317 struct net_device *netdev = data;
1318 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1319 struct ixgbe_hw *hw = &adapter->hw;
1320 u32 eicr;
1321
1322
1323 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
1324 * therefore no explict interrupt disable is necessary */
1325 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
1326 if (!eicr) {
1327 /* shared interrupt alert!
1328 * make sure interrupts are enabled because the read will
1329 * have disabled interrupts due to EIAM */
1330 ixgbe_irq_enable(adapter);
1331 return IRQ_NONE; /* Not our interrupt */
1332 }
1333
1334 if (eicr & IXGBE_EICR_LSC)
1335 ixgbe_check_lsc(adapter);
1336
1337 if (netif_rx_schedule_prep(netdev, &adapter->q_vector[0].napi)) {
1338 adapter->tx_ring[0].total_packets = 0;
1339 adapter->tx_ring[0].total_bytes = 0;
1340 adapter->rx_ring[0].total_packets = 0;
1341 adapter->rx_ring[0].total_bytes = 0;
1342 /* would disable interrupts here but EIAM disabled it */
1343 __netif_rx_schedule(netdev, &adapter->q_vector[0].napi);
1344 }
1345
1346 return IRQ_HANDLED;
1347 }
1348
1349 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
1350 {
1351 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1352
1353 for (i = 0; i < q_vectors; i++) {
1354 struct ixgbe_q_vector *q_vector = &adapter->q_vector[i];
1355 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
1356 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
1357 q_vector->rxr_count = 0;
1358 q_vector->txr_count = 0;
1359 }
1360 }
1361
1362 /**
1363 * ixgbe_request_irq - initialize interrupts
1364 * @adapter: board private structure
1365 *
1366 * Attempts to configure interrupts using the best available
1367 * capabilities of the hardware and kernel.
1368 **/
1369 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
1370 {
1371 struct net_device *netdev = adapter->netdev;
1372 int err;
1373
1374 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1375 err = ixgbe_request_msix_irqs(adapter);
1376 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
1377 err = request_irq(adapter->pdev->irq, &ixgbe_intr, 0,
1378 netdev->name, netdev);
1379 } else {
1380 err = request_irq(adapter->pdev->irq, &ixgbe_intr, IRQF_SHARED,
1381 netdev->name, netdev);
1382 }
1383
1384 if (err)
1385 DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err);
1386
1387 return err;
1388 }
1389
1390 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
1391 {
1392 struct net_device *netdev = adapter->netdev;
1393
1394 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1395 int i, q_vectors;
1396
1397 q_vectors = adapter->num_msix_vectors;
1398
1399 i = q_vectors - 1;
1400 free_irq(adapter->msix_entries[i].vector, netdev);
1401
1402 i--;
1403 for (; i >= 0; i--) {
1404 free_irq(adapter->msix_entries[i].vector,
1405 &(adapter->q_vector[i]));
1406 }
1407
1408 ixgbe_reset_q_vectors(adapter);
1409 } else {
1410 free_irq(adapter->pdev->irq, netdev);
1411 }
1412 }
1413
1414 /**
1415 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
1416 * @adapter: board private structure
1417 **/
1418 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
1419 {
1420 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
1421 IXGBE_WRITE_FLUSH(&adapter->hw);
1422 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1423 int i;
1424 for (i = 0; i < adapter->num_msix_vectors; i++)
1425 synchronize_irq(adapter->msix_entries[i].vector);
1426 } else {
1427 synchronize_irq(adapter->pdev->irq);
1428 }
1429 }
1430
1431 /**
1432 * ixgbe_irq_enable - Enable default interrupt generation settings
1433 * @adapter: board private structure
1434 **/
1435 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
1436 {
1437 u32 mask;
1438 mask = IXGBE_EIMS_ENABLE_MASK;
1439 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1440 IXGBE_WRITE_FLUSH(&adapter->hw);
1441 }
1442
1443 /**
1444 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
1445 *
1446 **/
1447 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
1448 {
1449 struct ixgbe_hw *hw = &adapter->hw;
1450
1451 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
1452 EITR_INTS_PER_SEC_TO_REG(adapter->eitr_param));
1453
1454 ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(0), 0);
1455 ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(0), 0);
1456
1457 map_vector_to_rxq(adapter, 0, 0);
1458 map_vector_to_txq(adapter, 0, 0);
1459
1460 DPRINTK(HW, INFO, "Legacy interrupt IVAR setup done\n");
1461 }
1462
1463 /**
1464 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
1465 * @adapter: board private structure
1466 *
1467 * Configure the Tx unit of the MAC after a reset.
1468 **/
1469 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
1470 {
1471 u64 tdba, tdwba;
1472 struct ixgbe_hw *hw = &adapter->hw;
1473 u32 i, j, tdlen, txctrl;
1474
1475 /* Setup the HW Tx Head and Tail descriptor pointers */
1476 for (i = 0; i < adapter->num_tx_queues; i++) {
1477 struct ixgbe_ring *ring = &adapter->tx_ring[i];
1478 j = ring->reg_idx;
1479 tdba = ring->dma;
1480 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1481 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(j),
1482 (tdba & DMA_32BIT_MASK));
1483 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(j), (tdba >> 32));
1484 tdwba = ring->dma +
1485 (ring->count * sizeof(union ixgbe_adv_tx_desc));
1486 tdwba |= IXGBE_TDWBAL_HEAD_WB_ENABLE;
1487 IXGBE_WRITE_REG(hw, IXGBE_TDWBAL(j), tdwba & DMA_32BIT_MASK);
1488 IXGBE_WRITE_REG(hw, IXGBE_TDWBAH(j), (tdwba >> 32));
1489 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(j), tdlen);
1490 IXGBE_WRITE_REG(hw, IXGBE_TDH(j), 0);
1491 IXGBE_WRITE_REG(hw, IXGBE_TDT(j), 0);
1492 adapter->tx_ring[i].head = IXGBE_TDH(j);
1493 adapter->tx_ring[i].tail = IXGBE_TDT(j);
1494 /* Disable Tx Head Writeback RO bit, since this hoses
1495 * bookkeeping if things aren't delivered in order.
1496 */
1497 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(j));
1498 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1499 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(j), txctrl);
1500 }
1501 }
1502
1503 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1504
1505 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter, int index)
1506 {
1507 struct ixgbe_ring *rx_ring;
1508 u32 srrctl;
1509 int queue0;
1510 unsigned long mask;
1511
1512 /* program one srrctl register per VMDq index */
1513 if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED) {
1514 long shift, len;
1515 mask = (unsigned long) adapter->ring_feature[RING_F_RSS].mask;
1516 len = sizeof(adapter->ring_feature[RING_F_VMDQ].mask) * 8;
1517 shift = find_first_bit(&mask, len);
1518 queue0 = index & mask;
1519 index = (index & mask) >> shift;
1520 /* program one srrctl per RSS queue since RDRXCTL.MVMEN is enabled */
1521 } else {
1522 mask = (unsigned long) adapter->ring_feature[RING_F_RSS].mask;
1523 queue0 = index & mask;
1524 index = index & mask;
1525 }
1526
1527 rx_ring = &adapter->rx_ring[queue0];
1528
1529 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
1530
1531 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
1532 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
1533
1534 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1535 srrctl |= IXGBE_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1536 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1537 srrctl |= ((IXGBE_RX_HDR_SIZE <<
1538 IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
1539 IXGBE_SRRCTL_BSIZEHDR_MASK);
1540 } else {
1541 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1542
1543 if (rx_ring->rx_buf_len == MAXIMUM_ETHERNET_VLAN_SIZE)
1544 srrctl |= IXGBE_RXBUFFER_2048 >>
1545 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1546 else
1547 srrctl |= rx_ring->rx_buf_len >>
1548 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1549 }
1550 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
1551 }
1552
1553 /**
1554 * ixgbe_get_skb_hdr - helper function for LRO header processing
1555 * @skb: pointer to sk_buff to be added to LRO packet
1556 * @iphdr: pointer to tcp header structure
1557 * @tcph: pointer to tcp header structure
1558 * @hdr_flags: pointer to header flags
1559 * @priv: private data
1560 **/
1561 static int ixgbe_get_skb_hdr(struct sk_buff *skb, void **iphdr, void **tcph,
1562 u64 *hdr_flags, void *priv)
1563 {
1564 union ixgbe_adv_rx_desc *rx_desc = priv;
1565
1566 /* Verify that this is a valid IPv4 TCP packet */
1567 if (!((ixgbe_get_pkt_info(rx_desc) & IXGBE_RXDADV_PKTTYPE_IPV4) &&
1568 (ixgbe_get_pkt_info(rx_desc) & IXGBE_RXDADV_PKTTYPE_TCP)))
1569 return -1;
1570
1571 /* Set network headers */
1572 skb_reset_network_header(skb);
1573 skb_set_transport_header(skb, ip_hdrlen(skb));
1574 *iphdr = ip_hdr(skb);
1575 *tcph = tcp_hdr(skb);
1576 *hdr_flags = LRO_IPV4 | LRO_TCP;
1577 return 0;
1578 }
1579
1580 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1581 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1582
1583 /**
1584 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
1585 * @adapter: board private structure
1586 *
1587 * Configure the Rx unit of the MAC after a reset.
1588 **/
1589 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
1590 {
1591 u64 rdba;
1592 struct ixgbe_hw *hw = &adapter->hw;
1593 struct net_device *netdev = adapter->netdev;
1594 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1595 int i, j;
1596 u32 rdlen, rxctrl, rxcsum;
1597 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
1598 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
1599 0x6A3E67EA, 0x14364D17, 0x3BED200D};
1600 u32 fctrl, hlreg0;
1601 u32 pages;
1602 u32 reta = 0, mrqc;
1603 u32 rdrxctl;
1604 int rx_buf_len;
1605
1606 /* Decide whether to use packet split mode or not */
1607 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
1608
1609 /* Set the RX buffer length according to the mode */
1610 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1611 rx_buf_len = IXGBE_RX_HDR_SIZE;
1612 } else {
1613 if (netdev->mtu <= ETH_DATA_LEN)
1614 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1615 else
1616 rx_buf_len = ALIGN(max_frame, 1024);
1617 }
1618
1619 fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
1620 fctrl |= IXGBE_FCTRL_BAM;
1621 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
1622 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
1623
1624 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
1625 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1626 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
1627 else
1628 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
1629 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
1630
1631 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1632
1633 rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
1634 /* disable receives while setting up the descriptors */
1635 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1636 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
1637
1638 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1639 * the Base and Length of the Rx Descriptor Ring */
1640 for (i = 0; i < adapter->num_rx_queues; i++) {
1641 rdba = adapter->rx_ring[i].dma;
1642 j = adapter->rx_ring[i].reg_idx;
1643 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(j), (rdba & DMA_32BIT_MASK));
1644 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(j), (rdba >> 32));
1645 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(j), rdlen);
1646 IXGBE_WRITE_REG(hw, IXGBE_RDH(j), 0);
1647 IXGBE_WRITE_REG(hw, IXGBE_RDT(j), 0);
1648 adapter->rx_ring[i].head = IXGBE_RDH(j);
1649 adapter->rx_ring[i].tail = IXGBE_RDT(j);
1650 adapter->rx_ring[i].rx_buf_len = rx_buf_len;
1651 /* Intitial LRO Settings */
1652 adapter->rx_ring[i].lro_mgr.max_aggr = IXGBE_MAX_LRO_AGGREGATE;
1653 adapter->rx_ring[i].lro_mgr.max_desc = IXGBE_MAX_LRO_DESCRIPTORS;
1654 adapter->rx_ring[i].lro_mgr.get_skb_header = ixgbe_get_skb_hdr;
1655 adapter->rx_ring[i].lro_mgr.features = LRO_F_EXTRACT_VLAN_ID;
1656 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
1657 adapter->rx_ring[i].lro_mgr.features |= LRO_F_NAPI;
1658 adapter->rx_ring[i].lro_mgr.dev = adapter->netdev;
1659 adapter->rx_ring[i].lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1660 adapter->rx_ring[i].lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1661
1662 ixgbe_configure_srrctl(adapter, j);
1663 }
1664
1665 /*
1666 * For VMDq support of different descriptor types or
1667 * buffer sizes through the use of multiple SRRCTL
1668 * registers, RDRXCTL.MVMEN must be set to 1
1669 *
1670 * also, the manual doesn't mention it clearly but DCA hints
1671 * will only use queue 0's tags unless this bit is set. Side
1672 * effects of setting this bit are only that SRRCTL must be
1673 * fully programmed [0..15]
1674 */
1675 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
1676 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
1677 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
1678
1679
1680 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
1681 /* Fill out redirection table */
1682 for (i = 0, j = 0; i < 128; i++, j++) {
1683 if (j == adapter->ring_feature[RING_F_RSS].indices)
1684 j = 0;
1685 /* reta = 4-byte sliding window of
1686 * 0x00..(indices-1)(indices-1)00..etc. */
1687 reta = (reta << 8) | (j * 0x11);
1688 if ((i & 3) == 3)
1689 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
1690 }
1691
1692 /* Fill out hash function seeds */
1693 for (i = 0; i < 10; i++)
1694 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
1695
1696 mrqc = IXGBE_MRQC_RSSEN
1697 /* Perform hash on these packet types */
1698 | IXGBE_MRQC_RSS_FIELD_IPV4
1699 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
1700 | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
1701 | IXGBE_MRQC_RSS_FIELD_IPV6_EX_TCP
1702 | IXGBE_MRQC_RSS_FIELD_IPV6_EX
1703 | IXGBE_MRQC_RSS_FIELD_IPV6
1704 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
1705 | IXGBE_MRQC_RSS_FIELD_IPV6_UDP
1706 | IXGBE_MRQC_RSS_FIELD_IPV6_EX_UDP;
1707 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
1708 }
1709
1710 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
1711
1712 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED ||
1713 adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
1714 /* Disable indicating checksum in descriptor, enables
1715 * RSS hash */
1716 rxcsum |= IXGBE_RXCSUM_PCSD;
1717 }
1718 if (!(rxcsum & IXGBE_RXCSUM_PCSD)) {
1719 /* Enable IPv4 payload checksum for UDP fragments
1720 * if PCSD is not set */
1721 rxcsum |= IXGBE_RXCSUM_IPPCSE;
1722 }
1723
1724 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
1725 }
1726
1727 static void ixgbe_vlan_rx_register(struct net_device *netdev,
1728 struct vlan_group *grp)
1729 {
1730 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1731 u32 ctrl;
1732
1733 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1734 ixgbe_irq_disable(adapter);
1735 adapter->vlgrp = grp;
1736
1737 if (grp) {
1738 /* enable VLAN tag insert/strip */
1739 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
1740 ctrl |= IXGBE_VLNCTRL_VME;
1741 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
1742 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
1743 }
1744
1745 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1746 ixgbe_irq_enable(adapter);
1747 }
1748
1749 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1750 {
1751 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1752 struct ixgbe_hw *hw = &adapter->hw;
1753
1754 /* add VID to filter table */
1755 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, true);
1756 }
1757
1758 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1759 {
1760 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1761 struct ixgbe_hw *hw = &adapter->hw;
1762
1763 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1764 ixgbe_irq_disable(adapter);
1765
1766 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1767
1768 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1769 ixgbe_irq_enable(adapter);
1770
1771 /* remove VID from filter table */
1772 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, false);
1773 }
1774
1775 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
1776 {
1777 ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
1778
1779 if (adapter->vlgrp) {
1780 u16 vid;
1781 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
1782 if (!vlan_group_get_device(adapter->vlgrp, vid))
1783 continue;
1784 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
1785 }
1786 }
1787 }
1788
1789 static u8 *ixgbe_addr_list_itr(struct ixgbe_hw *hw, u8 **mc_addr_ptr, u32 *vmdq)
1790 {
1791 struct dev_mc_list *mc_ptr;
1792 u8 *addr = *mc_addr_ptr;
1793 *vmdq = 0;
1794
1795 mc_ptr = container_of(addr, struct dev_mc_list, dmi_addr[0]);
1796 if (mc_ptr->next)
1797 *mc_addr_ptr = mc_ptr->next->dmi_addr;
1798 else
1799 *mc_addr_ptr = NULL;
1800
1801 return addr;
1802 }
1803
1804 /**
1805 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
1806 * @netdev: network interface device structure
1807 *
1808 * The set_rx_method entry point is called whenever the unicast/multicast
1809 * address list or the network interface flags are updated. This routine is
1810 * responsible for configuring the hardware for proper unicast, multicast and
1811 * promiscuous mode.
1812 **/
1813 static void ixgbe_set_rx_mode(struct net_device *netdev)
1814 {
1815 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1816 struct ixgbe_hw *hw = &adapter->hw;
1817 u32 fctrl, vlnctrl;
1818 u8 *addr_list = NULL;
1819 int addr_count = 0;
1820
1821 /* Check for Promiscuous and All Multicast modes */
1822
1823 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
1824 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
1825
1826 if (netdev->flags & IFF_PROMISC) {
1827 hw->addr_ctrl.user_set_promisc = 1;
1828 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
1829 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
1830 } else {
1831 if (netdev->flags & IFF_ALLMULTI) {
1832 fctrl |= IXGBE_FCTRL_MPE;
1833 fctrl &= ~IXGBE_FCTRL_UPE;
1834 } else {
1835 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
1836 }
1837 vlnctrl |= IXGBE_VLNCTRL_VFE;
1838 hw->addr_ctrl.user_set_promisc = 0;
1839 }
1840
1841 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
1842 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
1843
1844 /* reprogram secondary unicast list */
1845 addr_count = netdev->uc_count;
1846 if (addr_count)
1847 addr_list = netdev->uc_list->dmi_addr;
1848 hw->mac.ops.update_uc_addr_list(hw, addr_list, addr_count,
1849 ixgbe_addr_list_itr);
1850
1851 /* reprogram multicast list */
1852 addr_count = netdev->mc_count;
1853 if (addr_count)
1854 addr_list = netdev->mc_list->dmi_addr;
1855 hw->mac.ops.update_mc_addr_list(hw, addr_list, addr_count,
1856 ixgbe_addr_list_itr);
1857 }
1858
1859 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
1860 {
1861 int q_idx;
1862 struct ixgbe_q_vector *q_vector;
1863 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1864
1865 /* legacy and MSI only use one vector */
1866 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1867 q_vectors = 1;
1868
1869 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1870 struct napi_struct *napi;
1871 q_vector = &adapter->q_vector[q_idx];
1872 if (!q_vector->rxr_count)
1873 continue;
1874 napi = &q_vector->napi;
1875 if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) &&
1876 (q_vector->rxr_count > 1))
1877 napi->poll = &ixgbe_clean_rxonly_many;
1878
1879 napi_enable(napi);
1880 }
1881 }
1882
1883 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
1884 {
1885 int q_idx;
1886 struct ixgbe_q_vector *q_vector;
1887 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1888
1889 /* legacy and MSI only use one vector */
1890 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1891 q_vectors = 1;
1892
1893 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1894 q_vector = &adapter->q_vector[q_idx];
1895 if (!q_vector->rxr_count)
1896 continue;
1897 napi_disable(&q_vector->napi);
1898 }
1899 }
1900
1901 static void ixgbe_configure(struct ixgbe_adapter *adapter)
1902 {
1903 struct net_device *netdev = adapter->netdev;
1904 int i;
1905
1906 ixgbe_set_rx_mode(netdev);
1907
1908 ixgbe_restore_vlan(adapter);
1909
1910 ixgbe_configure_tx(adapter);
1911 ixgbe_configure_rx(adapter);
1912 for (i = 0; i < adapter->num_rx_queues; i++)
1913 ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i],
1914 (adapter->rx_ring[i].count - 1));
1915 }
1916
1917 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
1918 {
1919 struct net_device *netdev = adapter->netdev;
1920 struct ixgbe_hw *hw = &adapter->hw;
1921 int i, j = 0;
1922 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1923 u32 txdctl, rxdctl, mhadd;
1924 u32 gpie;
1925
1926 ixgbe_get_hw_control(adapter);
1927
1928 if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) ||
1929 (adapter->flags & IXGBE_FLAG_MSI_ENABLED)) {
1930 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1931 gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
1932 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
1933 } else {
1934 /* MSI only */
1935 gpie = 0;
1936 }
1937 /* XXX: to interrupt immediately for EICS writes, enable this */
1938 /* gpie |= IXGBE_GPIE_EIMEN; */
1939 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
1940 }
1941
1942 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
1943 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
1944 * specifically only auto mask tx and rx interrupts */
1945 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
1946 }
1947
1948 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
1949 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
1950 mhadd &= ~IXGBE_MHADD_MFS_MASK;
1951 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
1952
1953 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
1954 }
1955
1956 for (i = 0; i < adapter->num_tx_queues; i++) {
1957 j = adapter->tx_ring[i].reg_idx;
1958 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
1959 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
1960 txdctl |= (8 << 16);
1961 txdctl |= IXGBE_TXDCTL_ENABLE;
1962 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
1963 }
1964
1965 for (i = 0; i < adapter->num_rx_queues; i++) {
1966 j = adapter->rx_ring[i].reg_idx;
1967 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
1968 /* enable PTHRESH=32 descriptors (half the internal cache)
1969 * and HTHRESH=0 descriptors (to minimize latency on fetch),
1970 * this also removes a pesky rx_no_buffer_count increment */
1971 rxdctl |= 0x0020;
1972 rxdctl |= IXGBE_RXDCTL_ENABLE;
1973 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), rxdctl);
1974 }
1975 /* enable all receives */
1976 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1977 rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
1978 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxdctl);
1979
1980 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
1981 ixgbe_configure_msix(adapter);
1982 else
1983 ixgbe_configure_msi_and_legacy(adapter);
1984
1985 clear_bit(__IXGBE_DOWN, &adapter->state);
1986 ixgbe_napi_enable_all(adapter);
1987
1988 /* clear any pending interrupts, may auto mask */
1989 IXGBE_READ_REG(hw, IXGBE_EICR);
1990
1991 ixgbe_irq_enable(adapter);
1992
1993 /* bring the link up in the watchdog, this could race with our first
1994 * link up interrupt but shouldn't be a problem */
1995 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1996 adapter->link_check_timeout = jiffies;
1997 mod_timer(&adapter->watchdog_timer, jiffies);
1998 return 0;
1999 }
2000
2001 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
2002 {
2003 WARN_ON(in_interrupt());
2004 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
2005 msleep(1);
2006 ixgbe_down(adapter);
2007 ixgbe_up(adapter);
2008 clear_bit(__IXGBE_RESETTING, &adapter->state);
2009 }
2010
2011 int ixgbe_up(struct ixgbe_adapter *adapter)
2012 {
2013 /* hardware has been reset, we need to reload some things */
2014 ixgbe_configure(adapter);
2015
2016 return ixgbe_up_complete(adapter);
2017 }
2018
2019 void ixgbe_reset(struct ixgbe_adapter *adapter)
2020 {
2021 struct ixgbe_hw *hw = &adapter->hw;
2022 if (hw->mac.ops.init_hw(hw))
2023 dev_err(&adapter->pdev->dev, "Hardware Error\n");
2024
2025 /* reprogram the RAR[0] in case user changed it. */
2026 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
2027
2028 }
2029
2030 #ifdef CONFIG_PM
2031 static int ixgbe_resume(struct pci_dev *pdev)
2032 {
2033 struct net_device *netdev = pci_get_drvdata(pdev);
2034 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2035 u32 err;
2036
2037 pci_set_power_state(pdev, PCI_D0);
2038 pci_restore_state(pdev);
2039 err = pci_enable_device(pdev);
2040 if (err) {
2041 printk(KERN_ERR "ixgbe: Cannot enable PCI device from " \
2042 "suspend\n");
2043 return err;
2044 }
2045 pci_set_master(pdev);
2046
2047 pci_enable_wake(pdev, PCI_D3hot, 0);
2048 pci_enable_wake(pdev, PCI_D3cold, 0);
2049
2050 if (netif_running(netdev)) {
2051 err = ixgbe_request_irq(adapter);
2052 if (err)
2053 return err;
2054 }
2055
2056 ixgbe_reset(adapter);
2057
2058 if (netif_running(netdev))
2059 ixgbe_up(adapter);
2060
2061 netif_device_attach(netdev);
2062
2063 return 0;
2064 }
2065 #endif
2066
2067 /**
2068 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
2069 * @adapter: board private structure
2070 * @rx_ring: ring to free buffers from
2071 **/
2072 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
2073 struct ixgbe_ring *rx_ring)
2074 {
2075 struct pci_dev *pdev = adapter->pdev;
2076 unsigned long size;
2077 unsigned int i;
2078
2079 /* Free all the Rx ring sk_buffs */
2080
2081 for (i = 0; i < rx_ring->count; i++) {
2082 struct ixgbe_rx_buffer *rx_buffer_info;
2083
2084 rx_buffer_info = &rx_ring->rx_buffer_info[i];
2085 if (rx_buffer_info->dma) {
2086 pci_unmap_single(pdev, rx_buffer_info->dma,
2087 rx_ring->rx_buf_len,
2088 PCI_DMA_FROMDEVICE);
2089 rx_buffer_info->dma = 0;
2090 }
2091 if (rx_buffer_info->skb) {
2092 dev_kfree_skb(rx_buffer_info->skb);
2093 rx_buffer_info->skb = NULL;
2094 }
2095 if (!rx_buffer_info->page)
2096 continue;
2097 pci_unmap_page(pdev, rx_buffer_info->page_dma, PAGE_SIZE / 2,
2098 PCI_DMA_FROMDEVICE);
2099 rx_buffer_info->page_dma = 0;
2100 put_page(rx_buffer_info->page);
2101 rx_buffer_info->page = NULL;
2102 rx_buffer_info->page_offset = 0;
2103 }
2104
2105 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
2106 memset(rx_ring->rx_buffer_info, 0, size);
2107
2108 /* Zero out the descriptor ring */
2109 memset(rx_ring->desc, 0, rx_ring->size);
2110
2111 rx_ring->next_to_clean = 0;
2112 rx_ring->next_to_use = 0;
2113
2114 writel(0, adapter->hw.hw_addr + rx_ring->head);
2115 writel(0, adapter->hw.hw_addr + rx_ring->tail);
2116 }
2117
2118 /**
2119 * ixgbe_clean_tx_ring - Free Tx Buffers
2120 * @adapter: board private structure
2121 * @tx_ring: ring to be cleaned
2122 **/
2123 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
2124 struct ixgbe_ring *tx_ring)
2125 {
2126 struct ixgbe_tx_buffer *tx_buffer_info;
2127 unsigned long size;
2128 unsigned int i;
2129
2130 /* Free all the Tx ring sk_buffs */
2131
2132 for (i = 0; i < tx_ring->count; i++) {
2133 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2134 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
2135 }
2136
2137 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
2138 memset(tx_ring->tx_buffer_info, 0, size);
2139
2140 /* Zero out the descriptor ring */
2141 memset(tx_ring->desc, 0, tx_ring->size);
2142
2143 tx_ring->next_to_use = 0;
2144 tx_ring->next_to_clean = 0;
2145
2146 writel(0, adapter->hw.hw_addr + tx_ring->head);
2147 writel(0, adapter->hw.hw_addr + tx_ring->tail);
2148 }
2149
2150 /**
2151 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
2152 * @adapter: board private structure
2153 **/
2154 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
2155 {
2156 int i;
2157
2158 for (i = 0; i < adapter->num_rx_queues; i++)
2159 ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2160 }
2161
2162 /**
2163 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
2164 * @adapter: board private structure
2165 **/
2166 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
2167 {
2168 int i;
2169
2170 for (i = 0; i < adapter->num_tx_queues; i++)
2171 ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2172 }
2173
2174 void ixgbe_down(struct ixgbe_adapter *adapter)
2175 {
2176 struct net_device *netdev = adapter->netdev;
2177 u32 rxctrl;
2178
2179 /* signal that we are down to the interrupt handler */
2180 set_bit(__IXGBE_DOWN, &adapter->state);
2181
2182 /* disable receives */
2183 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXCTRL);
2184 IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXCTRL,
2185 rxctrl & ~IXGBE_RXCTRL_RXEN);
2186
2187 netif_tx_disable(netdev);
2188
2189 /* disable transmits in the hardware */
2190
2191 /* flush both disables */
2192 IXGBE_WRITE_FLUSH(&adapter->hw);
2193 msleep(10);
2194
2195 ixgbe_irq_disable(adapter);
2196
2197 ixgbe_napi_disable_all(adapter);
2198 del_timer_sync(&adapter->watchdog_timer);
2199 cancel_work_sync(&adapter->watchdog_task);
2200
2201 netif_carrier_off(netdev);
2202 netif_tx_stop_all_queues(netdev);
2203
2204 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
2205 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
2206 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
2207 dca_remove_requester(&adapter->pdev->dev);
2208 }
2209
2210 #endif
2211 if (!pci_channel_offline(adapter->pdev))
2212 ixgbe_reset(adapter);
2213 ixgbe_clean_all_tx_rings(adapter);
2214 ixgbe_clean_all_rx_rings(adapter);
2215
2216 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
2217 /* since we reset the hardware DCA settings were cleared */
2218 if (dca_add_requester(&adapter->pdev->dev) == 0) {
2219 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
2220 /* always use CB2 mode, difference is masked
2221 * in the CB driver */
2222 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
2223 ixgbe_setup_dca(adapter);
2224 }
2225 #endif
2226 }
2227
2228 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
2229 {
2230 struct net_device *netdev = pci_get_drvdata(pdev);
2231 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2232 #ifdef CONFIG_PM
2233 int retval = 0;
2234 #endif
2235
2236 netif_device_detach(netdev);
2237
2238 if (netif_running(netdev)) {
2239 ixgbe_down(adapter);
2240 ixgbe_free_irq(adapter);
2241 }
2242
2243 #ifdef CONFIG_PM
2244 retval = pci_save_state(pdev);
2245 if (retval)
2246 return retval;
2247 #endif
2248
2249 pci_enable_wake(pdev, PCI_D3hot, 0);
2250 pci_enable_wake(pdev, PCI_D3cold, 0);
2251
2252 ixgbe_release_hw_control(adapter);
2253
2254 pci_disable_device(pdev);
2255
2256 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2257
2258 return 0;
2259 }
2260
2261 static void ixgbe_shutdown(struct pci_dev *pdev)
2262 {
2263 ixgbe_suspend(pdev, PMSG_SUSPEND);
2264 }
2265
2266 /**
2267 * ixgbe_poll - NAPI Rx polling callback
2268 * @napi: structure for representing this polling device
2269 * @budget: how many packets driver is allowed to clean
2270 *
2271 * This function is used for legacy and MSI, NAPI mode
2272 **/
2273 static int ixgbe_poll(struct napi_struct *napi, int budget)
2274 {
2275 struct ixgbe_q_vector *q_vector = container_of(napi,
2276 struct ixgbe_q_vector, napi);
2277 struct ixgbe_adapter *adapter = q_vector->adapter;
2278 int tx_cleaned = 0, work_done = 0;
2279
2280 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
2281 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
2282 ixgbe_update_tx_dca(adapter, adapter->tx_ring);
2283 ixgbe_update_rx_dca(adapter, adapter->rx_ring);
2284 }
2285 #endif
2286
2287 tx_cleaned = ixgbe_clean_tx_irq(adapter, adapter->tx_ring);
2288 ixgbe_clean_rx_irq(adapter, adapter->rx_ring, &work_done, budget);
2289
2290 if (tx_cleaned)
2291 work_done = budget;
2292
2293 /* If budget not fully consumed, exit the polling mode */
2294 if (work_done < budget) {
2295 netif_rx_complete(adapter->netdev, napi);
2296 if (adapter->itr_setting & 3)
2297 ixgbe_set_itr(adapter);
2298 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2299 ixgbe_irq_enable(adapter);
2300 }
2301
2302 return work_done;
2303 }
2304
2305 /**
2306 * ixgbe_tx_timeout - Respond to a Tx Hang
2307 * @netdev: network interface device structure
2308 **/
2309 static void ixgbe_tx_timeout(struct net_device *netdev)
2310 {
2311 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2312
2313 /* Do the reset outside of interrupt context */
2314 schedule_work(&adapter->reset_task);
2315 }
2316
2317 static void ixgbe_reset_task(struct work_struct *work)
2318 {
2319 struct ixgbe_adapter *adapter;
2320 adapter = container_of(work, struct ixgbe_adapter, reset_task);
2321
2322 adapter->tx_timeout_count++;
2323
2324 ixgbe_reinit_locked(adapter);
2325 }
2326
2327 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
2328 int vectors)
2329 {
2330 int err, vector_threshold;
2331
2332 /* We'll want at least 3 (vector_threshold):
2333 * 1) TxQ[0] Cleanup
2334 * 2) RxQ[0] Cleanup
2335 * 3) Other (Link Status Change, etc.)
2336 * 4) TCP Timer (optional)
2337 */
2338 vector_threshold = MIN_MSIX_COUNT;
2339
2340 /* The more we get, the more we will assign to Tx/Rx Cleanup
2341 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
2342 * Right now, we simply care about how many we'll get; we'll
2343 * set them up later while requesting irq's.
2344 */
2345 while (vectors >= vector_threshold) {
2346 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
2347 vectors);
2348 if (!err) /* Success in acquiring all requested vectors. */
2349 break;
2350 else if (err < 0)
2351 vectors = 0; /* Nasty failure, quit now */
2352 else /* err == number of vectors we should try again with */
2353 vectors = err;
2354 }
2355
2356 if (vectors < vector_threshold) {
2357 /* Can't allocate enough MSI-X interrupts? Oh well.
2358 * This just means we'll go with either a single MSI
2359 * vector or fall back to legacy interrupts.
2360 */
2361 DPRINTK(HW, DEBUG, "Unable to allocate MSI-X interrupts\n");
2362 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2363 kfree(adapter->msix_entries);
2364 adapter->msix_entries = NULL;
2365 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
2366 adapter->num_tx_queues = 1;
2367 adapter->num_rx_queues = 1;
2368 } else {
2369 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
2370 adapter->num_msix_vectors = vectors;
2371 }
2372 }
2373
2374 static void __devinit ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
2375 {
2376 int nrq, ntq;
2377 int feature_mask = 0, rss_i, rss_m;
2378
2379 /* Number of supported queues */
2380 switch (adapter->hw.mac.type) {
2381 case ixgbe_mac_82598EB:
2382 rss_i = adapter->ring_feature[RING_F_RSS].indices;
2383 rss_m = 0;
2384 feature_mask |= IXGBE_FLAG_RSS_ENABLED;
2385
2386 switch (adapter->flags & feature_mask) {
2387 case (IXGBE_FLAG_RSS_ENABLED):
2388 rss_m = 0xF;
2389 nrq = rss_i;
2390 ntq = rss_i;
2391 break;
2392 case 0:
2393 default:
2394 rss_i = 0;
2395 rss_m = 0;
2396 nrq = 1;
2397 ntq = 1;
2398 break;
2399 }
2400
2401 adapter->ring_feature[RING_F_RSS].indices = rss_i;
2402 adapter->ring_feature[RING_F_RSS].mask = rss_m;
2403 break;
2404 default:
2405 nrq = 1;
2406 ntq = 1;
2407 break;
2408 }
2409
2410 adapter->num_rx_queues = nrq;
2411 adapter->num_tx_queues = ntq;
2412 }
2413
2414 /**
2415 * ixgbe_cache_ring_register - Descriptor ring to register mapping
2416 * @adapter: board private structure to initialize
2417 *
2418 * Once we know the feature-set enabled for the device, we'll cache
2419 * the register offset the descriptor ring is assigned to.
2420 **/
2421 static void __devinit ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
2422 {
2423 /* TODO: Remove all uses of the indices in the cases where multiple
2424 * features are OR'd together, if the feature set makes sense.
2425 */
2426 int feature_mask = 0, rss_i;
2427 int i, txr_idx, rxr_idx;
2428
2429 /* Number of supported queues */
2430 switch (adapter->hw.mac.type) {
2431 case ixgbe_mac_82598EB:
2432 rss_i = adapter->ring_feature[RING_F_RSS].indices;
2433 txr_idx = 0;
2434 rxr_idx = 0;
2435 feature_mask |= IXGBE_FLAG_RSS_ENABLED;
2436 switch (adapter->flags & feature_mask) {
2437 case (IXGBE_FLAG_RSS_ENABLED):
2438 for (i = 0; i < adapter->num_rx_queues; i++)
2439 adapter->rx_ring[i].reg_idx = i;
2440 for (i = 0; i < adapter->num_tx_queues; i++)
2441 adapter->tx_ring[i].reg_idx = i;
2442 break;
2443 case 0:
2444 default:
2445 break;
2446 }
2447 break;
2448 default:
2449 break;
2450 }
2451 }
2452
2453 /**
2454 * ixgbe_alloc_queues - Allocate memory for all rings
2455 * @adapter: board private structure to initialize
2456 *
2457 * We allocate one ring per queue at run-time since we don't know the
2458 * number of queues at compile-time. The polling_netdev array is
2459 * intended for Multiqueue, but should work fine with a single queue.
2460 **/
2461 static int __devinit ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
2462 {
2463 int i;
2464
2465 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
2466 sizeof(struct ixgbe_ring), GFP_KERNEL);
2467 if (!adapter->tx_ring)
2468 goto err_tx_ring_allocation;
2469
2470 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
2471 sizeof(struct ixgbe_ring), GFP_KERNEL);
2472 if (!adapter->rx_ring)
2473 goto err_rx_ring_allocation;
2474
2475 for (i = 0; i < adapter->num_tx_queues; i++) {
2476 adapter->tx_ring[i].count = IXGBE_DEFAULT_TXD;
2477 adapter->tx_ring[i].queue_index = i;
2478 }
2479 for (i = 0; i < adapter->num_rx_queues; i++) {
2480 adapter->rx_ring[i].count = IXGBE_DEFAULT_RXD;
2481 adapter->rx_ring[i].queue_index = i;
2482 }
2483
2484 ixgbe_cache_ring_register(adapter);
2485
2486 return 0;
2487
2488 err_rx_ring_allocation:
2489 kfree(adapter->tx_ring);
2490 err_tx_ring_allocation:
2491 return -ENOMEM;
2492 }
2493
2494 /**
2495 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
2496 * @adapter: board private structure to initialize
2497 *
2498 * Attempt to configure the interrupts using the best available
2499 * capabilities of the hardware and the kernel.
2500 **/
2501 static int __devinit ixgbe_set_interrupt_capability(struct ixgbe_adapter
2502 *adapter)
2503 {
2504 int err = 0;
2505 int vector, v_budget;
2506
2507 /*
2508 * It's easy to be greedy for MSI-X vectors, but it really
2509 * doesn't do us much good if we have a lot more vectors
2510 * than CPU's. So let's be conservative and only ask for
2511 * (roughly) twice the number of vectors as there are CPU's.
2512 */
2513 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
2514 (int)(num_online_cpus() * 2)) + NON_Q_VECTORS;
2515
2516 /*
2517 * At the same time, hardware can only support a maximum of
2518 * MAX_MSIX_COUNT vectors. With features such as RSS and VMDq,
2519 * we can easily reach upwards of 64 Rx descriptor queues and
2520 * 32 Tx queues. Thus, we cap it off in those rare cases where
2521 * the cpu count also exceeds our vector limit.
2522 */
2523 v_budget = min(v_budget, MAX_MSIX_COUNT);
2524
2525 /* A failure in MSI-X entry allocation isn't fatal, but it does
2526 * mean we disable MSI-X capabilities of the adapter. */
2527 adapter->msix_entries = kcalloc(v_budget,
2528 sizeof(struct msix_entry), GFP_KERNEL);
2529 if (!adapter->msix_entries) {
2530 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
2531 ixgbe_set_num_queues(adapter);
2532 kfree(adapter->tx_ring);
2533 kfree(adapter->rx_ring);
2534 err = ixgbe_alloc_queues(adapter);
2535 if (err) {
2536 DPRINTK(PROBE, ERR, "Unable to allocate memory "
2537 "for queues\n");
2538 goto out;
2539 }
2540
2541 goto try_msi;
2542 }
2543
2544 for (vector = 0; vector < v_budget; vector++)
2545 adapter->msix_entries[vector].entry = vector;
2546
2547 ixgbe_acquire_msix_vectors(adapter, v_budget);
2548
2549 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2550 goto out;
2551
2552 try_msi:
2553 err = pci_enable_msi(adapter->pdev);
2554 if (!err) {
2555 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
2556 } else {
2557 DPRINTK(HW, DEBUG, "Unable to allocate MSI interrupt, "
2558 "falling back to legacy. Error: %d\n", err);
2559 /* reset err */
2560 err = 0;
2561 }
2562
2563 out:
2564 /* Notify the stack of the (possibly) reduced Tx Queue count. */
2565 adapter->netdev->real_num_tx_queues = adapter->num_tx_queues;
2566
2567 return err;
2568 }
2569
2570 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
2571 {
2572 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2573 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2574 pci_disable_msix(adapter->pdev);
2575 kfree(adapter->msix_entries);
2576 adapter->msix_entries = NULL;
2577 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
2578 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
2579 pci_disable_msi(adapter->pdev);
2580 }
2581 return;
2582 }
2583
2584 /**
2585 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
2586 * @adapter: board private structure to initialize
2587 *
2588 * We determine which interrupt scheme to use based on...
2589 * - Kernel support (MSI, MSI-X)
2590 * - which can be user-defined (via MODULE_PARAM)
2591 * - Hardware queue count (num_*_queues)
2592 * - defined by miscellaneous hardware support/features (RSS, etc.)
2593 **/
2594 static int __devinit ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
2595 {
2596 int err;
2597
2598 /* Number of supported queues */
2599 ixgbe_set_num_queues(adapter);
2600
2601 err = ixgbe_alloc_queues(adapter);
2602 if (err) {
2603 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
2604 goto err_alloc_queues;
2605 }
2606
2607 err = ixgbe_set_interrupt_capability(adapter);
2608 if (err) {
2609 DPRINTK(PROBE, ERR, "Unable to setup interrupt capabilities\n");
2610 goto err_set_interrupt;
2611 }
2612
2613 DPRINTK(DRV, INFO, "Multiqueue %s: Rx Queue count = %u, "
2614 "Tx Queue count = %u\n",
2615 (adapter->num_rx_queues > 1) ? "Enabled" :
2616 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
2617
2618 set_bit(__IXGBE_DOWN, &adapter->state);
2619
2620 return 0;
2621
2622 err_set_interrupt:
2623 kfree(adapter->tx_ring);
2624 kfree(adapter->rx_ring);
2625 err_alloc_queues:
2626 return err;
2627 }
2628
2629 /**
2630 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
2631 * @adapter: board private structure to initialize
2632 *
2633 * ixgbe_sw_init initializes the Adapter private data structure.
2634 * Fields are initialized based on PCI device information and
2635 * OS network device settings (MTU size).
2636 **/
2637 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
2638 {
2639 struct ixgbe_hw *hw = &adapter->hw;
2640 struct pci_dev *pdev = adapter->pdev;
2641 unsigned int rss;
2642
2643 /* PCI config space info */
2644
2645 hw->vendor_id = pdev->vendor;
2646 hw->device_id = pdev->device;
2647 hw->revision_id = pdev->revision;
2648 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2649 hw->subsystem_device_id = pdev->subsystem_device;
2650
2651 /* Set capability flags */
2652 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
2653 adapter->ring_feature[RING_F_RSS].indices = rss;
2654 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
2655
2656 /* default flow control settings */
2657 hw->fc.original_type = ixgbe_fc_none;
2658 hw->fc.type = ixgbe_fc_none;
2659 hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
2660 hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
2661 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
2662 hw->fc.send_xon = true;
2663
2664 /* select 10G link by default */
2665 hw->mac.link_mode_select = IXGBE_AUTOC_LMS_10G_LINK_NO_AN;
2666
2667 /* enable itr by default in dynamic mode */
2668 adapter->itr_setting = 1;
2669 adapter->eitr_param = 20000;
2670
2671 /* set defaults for eitr in MegaBytes */
2672 adapter->eitr_low = 10;
2673 adapter->eitr_high = 20;
2674
2675 /* set default ring sizes */
2676 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
2677 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
2678
2679 /* initialize eeprom parameters */
2680 if (ixgbe_init_eeprom_params_generic(hw)) {
2681 dev_err(&pdev->dev, "EEPROM initialization failed\n");
2682 return -EIO;
2683 }
2684
2685 /* enable rx csum by default */
2686 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
2687
2688 set_bit(__IXGBE_DOWN, &adapter->state);
2689
2690 return 0;
2691 }
2692
2693 /**
2694 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
2695 * @adapter: board private structure
2696 * @tx_ring: tx descriptor ring (for a specific queue) to setup
2697 *
2698 * Return 0 on success, negative on failure
2699 **/
2700 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
2701 struct ixgbe_ring *tx_ring)
2702 {
2703 struct pci_dev *pdev = adapter->pdev;
2704 int size;
2705
2706 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
2707 tx_ring->tx_buffer_info = vmalloc(size);
2708 if (!tx_ring->tx_buffer_info)
2709 goto err;
2710 memset(tx_ring->tx_buffer_info, 0, size);
2711
2712 /* round up to nearest 4K */
2713 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc) +
2714 sizeof(u32);
2715 tx_ring->size = ALIGN(tx_ring->size, 4096);
2716
2717 tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
2718 &tx_ring->dma);
2719 if (!tx_ring->desc)
2720 goto err;
2721
2722 tx_ring->next_to_use = 0;
2723 tx_ring->next_to_clean = 0;
2724 tx_ring->work_limit = tx_ring->count;
2725 return 0;
2726
2727 err:
2728 vfree(tx_ring->tx_buffer_info);
2729 tx_ring->tx_buffer_info = NULL;
2730 DPRINTK(PROBE, ERR, "Unable to allocate memory for the transmit "
2731 "descriptor ring\n");
2732 return -ENOMEM;
2733 }
2734
2735 /**
2736 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
2737 * @adapter: board private structure
2738 * @rx_ring: rx descriptor ring (for a specific queue) to setup
2739 *
2740 * Returns 0 on success, negative on failure
2741 **/
2742 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
2743 struct ixgbe_ring *rx_ring)
2744 {
2745 struct pci_dev *pdev = adapter->pdev;
2746 int size;
2747
2748 size = sizeof(struct net_lro_desc) * IXGBE_MAX_LRO_DESCRIPTORS;
2749 rx_ring->lro_mgr.lro_arr = vmalloc(size);
2750 if (!rx_ring->lro_mgr.lro_arr)
2751 return -ENOMEM;
2752 memset(rx_ring->lro_mgr.lro_arr, 0, size);
2753
2754 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
2755 rx_ring->rx_buffer_info = vmalloc(size);
2756 if (!rx_ring->rx_buffer_info) {
2757 DPRINTK(PROBE, ERR,
2758 "vmalloc allocation failed for the rx desc ring\n");
2759 goto alloc_failed;
2760 }
2761 memset(rx_ring->rx_buffer_info, 0, size);
2762
2763 /* Round up to nearest 4K */
2764 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
2765 rx_ring->size = ALIGN(rx_ring->size, 4096);
2766
2767 rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size, &rx_ring->dma);
2768
2769 if (!rx_ring->desc) {
2770 DPRINTK(PROBE, ERR,
2771 "Memory allocation failed for the rx desc ring\n");
2772 vfree(rx_ring->rx_buffer_info);
2773 goto alloc_failed;
2774 }
2775
2776 rx_ring->next_to_clean = 0;
2777 rx_ring->next_to_use = 0;
2778
2779 return 0;
2780
2781 alloc_failed:
2782 vfree(rx_ring->lro_mgr.lro_arr);
2783 rx_ring->lro_mgr.lro_arr = NULL;
2784 return -ENOMEM;
2785 }
2786
2787 /**
2788 * ixgbe_free_tx_resources - Free Tx Resources per Queue
2789 * @adapter: board private structure
2790 * @tx_ring: Tx descriptor ring for a specific queue
2791 *
2792 * Free all transmit software resources
2793 **/
2794 void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
2795 struct ixgbe_ring *tx_ring)
2796 {
2797 struct pci_dev *pdev = adapter->pdev;
2798
2799 ixgbe_clean_tx_ring(adapter, tx_ring);
2800
2801 vfree(tx_ring->tx_buffer_info);
2802 tx_ring->tx_buffer_info = NULL;
2803
2804 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2805
2806 tx_ring->desc = NULL;
2807 }
2808
2809 /**
2810 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
2811 * @adapter: board private structure
2812 *
2813 * Free all transmit software resources
2814 **/
2815 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
2816 {
2817 int i;
2818
2819 for (i = 0; i < adapter->num_tx_queues; i++)
2820 ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
2821 }
2822
2823 /**
2824 * ixgbe_ree_rx_resources - Free Rx Resources
2825 * @adapter: board private structure
2826 * @rx_ring: ring to clean the resources from
2827 *
2828 * Free all receive software resources
2829 **/
2830 void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
2831 struct ixgbe_ring *rx_ring)
2832 {
2833 struct pci_dev *pdev = adapter->pdev;
2834
2835 vfree(rx_ring->lro_mgr.lro_arr);
2836 rx_ring->lro_mgr.lro_arr = NULL;
2837
2838 ixgbe_clean_rx_ring(adapter, rx_ring);
2839
2840 vfree(rx_ring->rx_buffer_info);
2841 rx_ring->rx_buffer_info = NULL;
2842
2843 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2844
2845 rx_ring->desc = NULL;
2846 }
2847
2848 /**
2849 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
2850 * @adapter: board private structure
2851 *
2852 * Free all receive software resources
2853 **/
2854 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
2855 {
2856 int i;
2857
2858 for (i = 0; i < adapter->num_rx_queues; i++)
2859 ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
2860 }
2861
2862 /**
2863 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
2864 * @adapter: board private structure
2865 *
2866 * If this function returns with an error, then it's possible one or
2867 * more of the rings is populated (while the rest are not). It is the
2868 * callers duty to clean those orphaned rings.
2869 *
2870 * Return 0 on success, negative on failure
2871 **/
2872 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
2873 {
2874 int i, err = 0;
2875
2876 for (i = 0; i < adapter->num_tx_queues; i++) {
2877 err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]);
2878 if (err) {
2879 DPRINTK(PROBE, ERR,
2880 "Allocation for Tx Queue %u failed\n", i);
2881 break;
2882 }
2883 }
2884
2885 return err;
2886 }
2887
2888 /**
2889 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
2890 * @adapter: board private structure
2891 *
2892 * If this function returns with an error, then it's possible one or
2893 * more of the rings is populated (while the rest are not). It is the
2894 * callers duty to clean those orphaned rings.
2895 *
2896 * Return 0 on success, negative on failure
2897 **/
2898
2899 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
2900 {
2901 int i, err = 0;
2902
2903 for (i = 0; i < adapter->num_rx_queues; i++) {
2904 err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]);
2905 if (err) {
2906 DPRINTK(PROBE, ERR,
2907 "Allocation for Rx Queue %u failed\n", i);
2908 break;
2909 }
2910 }
2911
2912 return err;
2913 }
2914
2915 /**
2916 * ixgbe_change_mtu - Change the Maximum Transfer Unit
2917 * @netdev: network interface device structure
2918 * @new_mtu: new value for maximum frame size
2919 *
2920 * Returns 0 on success, negative on failure
2921 **/
2922 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
2923 {
2924 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2925 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2926
2927 /* MTU < 68 is an error and causes problems on some kernels */
2928 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
2929 return -EINVAL;
2930
2931 DPRINTK(PROBE, INFO, "changing MTU from %d to %d\n",
2932 netdev->mtu, new_mtu);
2933 /* must set new MTU before calling down or up */
2934 netdev->mtu = new_mtu;
2935
2936 if (netif_running(netdev))
2937 ixgbe_reinit_locked(adapter);
2938
2939 return 0;
2940 }
2941
2942 /**
2943 * ixgbe_open - Called when a network interface is made active
2944 * @netdev: network interface device structure
2945 *
2946 * Returns 0 on success, negative value on failure
2947 *
2948 * The open entry point is called when a network interface is made
2949 * active by the system (IFF_UP). At this point all resources needed
2950 * for transmit and receive operations are allocated, the interrupt
2951 * handler is registered with the OS, the watchdog timer is started,
2952 * and the stack is notified that the interface is ready.
2953 **/
2954 static int ixgbe_open(struct net_device *netdev)
2955 {
2956 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2957 int err;
2958
2959 /* disallow open during test */
2960 if (test_bit(__IXGBE_TESTING, &adapter->state))
2961 return -EBUSY;
2962
2963 /* allocate transmit descriptors */
2964 err = ixgbe_setup_all_tx_resources(adapter);
2965 if (err)
2966 goto err_setup_tx;
2967
2968 /* allocate receive descriptors */
2969 err = ixgbe_setup_all_rx_resources(adapter);
2970 if (err)
2971 goto err_setup_rx;
2972
2973 ixgbe_configure(adapter);
2974
2975 err = ixgbe_request_irq(adapter);
2976 if (err)
2977 goto err_req_irq;
2978
2979 err = ixgbe_up_complete(adapter);
2980 if (err)
2981 goto err_up;
2982
2983 netif_tx_start_all_queues(netdev);
2984
2985 return 0;
2986
2987 err_up:
2988 ixgbe_release_hw_control(adapter);
2989 ixgbe_free_irq(adapter);
2990 err_req_irq:
2991 ixgbe_free_all_rx_resources(adapter);
2992 err_setup_rx:
2993 ixgbe_free_all_tx_resources(adapter);
2994 err_setup_tx:
2995 ixgbe_reset(adapter);
2996
2997 return err;
2998 }
2999
3000 /**
3001 * ixgbe_close - Disables a network interface
3002 * @netdev: network interface device structure
3003 *
3004 * Returns 0, this is not allowed to fail
3005 *
3006 * The close entry point is called when an interface is de-activated
3007 * by the OS. The hardware is still under the drivers control, but
3008 * needs to be disabled. A global MAC reset is issued to stop the
3009 * hardware, and all transmit and receive resources are freed.
3010 **/
3011 static int ixgbe_close(struct net_device *netdev)
3012 {
3013 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3014
3015 ixgbe_down(adapter);
3016 ixgbe_free_irq(adapter);
3017
3018 ixgbe_free_all_tx_resources(adapter);
3019 ixgbe_free_all_rx_resources(adapter);
3020
3021 ixgbe_release_hw_control(adapter);
3022
3023 return 0;
3024 }
3025
3026 /**
3027 * ixgbe_update_stats - Update the board statistics counters.
3028 * @adapter: board private structure
3029 **/
3030 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
3031 {
3032 struct ixgbe_hw *hw = &adapter->hw;
3033 u64 total_mpc = 0;
3034 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
3035
3036 adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
3037 for (i = 0; i < 8; i++) {
3038 /* for packet buffers not used, the register should read 0 */
3039 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
3040 missed_rx += mpc;
3041 adapter->stats.mpc[i] += mpc;
3042 total_mpc += adapter->stats.mpc[i];
3043 adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
3044 }
3045 adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
3046 /* work around hardware counting issue */
3047 adapter->stats.gprc -= missed_rx;
3048
3049 /* 82598 hardware only has a 32 bit counter in the high register */
3050 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
3051 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
3052 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
3053 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
3054 adapter->stats.bprc += bprc;
3055 adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
3056 adapter->stats.mprc -= bprc;
3057 adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
3058 adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
3059 adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
3060 adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
3061 adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
3062 adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
3063 adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
3064 adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
3065 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
3066 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
3067 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
3068 adapter->stats.lxontxc += lxon;
3069 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
3070 adapter->stats.lxofftxc += lxoff;
3071 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
3072 adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
3073 adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
3074 /*
3075 * 82598 errata - tx of flow control packets is included in tx counters
3076 */
3077 xon_off_tot = lxon + lxoff;
3078 adapter->stats.gptc -= xon_off_tot;
3079 adapter->stats.mptc -= xon_off_tot;
3080 adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
3081 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
3082 adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
3083 adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
3084 adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
3085 adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
3086 adapter->stats.ptc64 -= xon_off_tot;
3087 adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
3088 adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
3089 adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
3090 adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
3091 adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
3092 adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
3093
3094 /* Fill out the OS statistics structure */
3095 adapter->net_stats.multicast = adapter->stats.mprc;
3096
3097 /* Rx Errors */
3098 adapter->net_stats.rx_errors = adapter->stats.crcerrs +
3099 adapter->stats.rlec;
3100 adapter->net_stats.rx_dropped = 0;
3101 adapter->net_stats.rx_length_errors = adapter->stats.rlec;
3102 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3103 adapter->net_stats.rx_missed_errors = total_mpc;
3104 }
3105
3106 /**
3107 * ixgbe_watchdog - Timer Call-back
3108 * @data: pointer to adapter cast into an unsigned long
3109 **/
3110 static void ixgbe_watchdog(unsigned long data)
3111 {
3112 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
3113 struct ixgbe_hw *hw = &adapter->hw;
3114
3115 /* Do the watchdog outside of interrupt context due to the lovely
3116 * delays that some of the newer hardware requires */
3117 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
3118 /* Cause software interrupt to ensure rx rings are cleaned */
3119 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3120 u32 eics =
3121 (1 << (adapter->num_msix_vectors - NON_Q_VECTORS)) - 1;
3122 IXGBE_WRITE_REG(hw, IXGBE_EICS, eics);
3123 } else {
3124 /* For legacy and MSI interrupts don't set any bits that
3125 * are enabled for EIAM, because this operation would
3126 * set *both* EIMS and EICS for any bit in EIAM */
3127 IXGBE_WRITE_REG(hw, IXGBE_EICS,
3128 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
3129 }
3130 /* Reset the timer */
3131 mod_timer(&adapter->watchdog_timer,
3132 round_jiffies(jiffies + 2 * HZ));
3133 }
3134
3135 schedule_work(&adapter->watchdog_task);
3136 }
3137
3138 /**
3139 * ixgbe_watchdog_task - worker thread to bring link up
3140 * @work: pointer to work_struct containing our data
3141 **/
3142 static void ixgbe_watchdog_task(struct work_struct *work)
3143 {
3144 struct ixgbe_adapter *adapter = container_of(work,
3145 struct ixgbe_adapter,
3146 watchdog_task);
3147 struct net_device *netdev = adapter->netdev;
3148 struct ixgbe_hw *hw = &adapter->hw;
3149 u32 link_speed = adapter->link_speed;
3150 bool link_up = adapter->link_up;
3151
3152 adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
3153
3154 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
3155 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
3156 if (link_up ||
3157 time_after(jiffies, (adapter->link_check_timeout +
3158 IXGBE_TRY_LINK_TIMEOUT))) {
3159 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
3160 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
3161 }
3162 adapter->link_up = link_up;
3163 adapter->link_speed = link_speed;
3164 }
3165
3166 if (link_up) {
3167 if (!netif_carrier_ok(netdev)) {
3168 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3169 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
3170 #define FLOW_RX (frctl & IXGBE_FCTRL_RFCE)
3171 #define FLOW_TX (rmcs & IXGBE_RMCS_TFCE_802_3X)
3172 DPRINTK(LINK, INFO, "NIC Link is Up %s, "
3173 "Flow Control: %s\n",
3174 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
3175 "10 Gbps" :
3176 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
3177 "1 Gbps" : "unknown speed")),
3178 ((FLOW_RX && FLOW_TX) ? "RX/TX" :
3179 (FLOW_RX ? "RX" :
3180 (FLOW_TX ? "TX" : "None"))));
3181
3182 netif_carrier_on(netdev);
3183 netif_tx_wake_all_queues(netdev);
3184 } else {
3185 /* Force detection of hung controller */
3186 adapter->detect_tx_hung = true;
3187 }
3188 } else {
3189 adapter->link_up = false;
3190 adapter->link_speed = 0;
3191 if (netif_carrier_ok(netdev)) {
3192 DPRINTK(LINK, INFO, "NIC Link is Down\n");
3193 netif_carrier_off(netdev);
3194 netif_tx_stop_all_queues(netdev);
3195 }
3196 }
3197
3198 ixgbe_update_stats(adapter);
3199 adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
3200 }
3201
3202 static int ixgbe_tso(struct ixgbe_adapter *adapter,
3203 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
3204 u32 tx_flags, u8 *hdr_len)
3205 {
3206 struct ixgbe_adv_tx_context_desc *context_desc;
3207 unsigned int i;
3208 int err;
3209 struct ixgbe_tx_buffer *tx_buffer_info;
3210 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
3211 u32 mss_l4len_idx = 0, l4len;
3212
3213 if (skb_is_gso(skb)) {
3214 if (skb_header_cloned(skb)) {
3215 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
3216 if (err)
3217 return err;
3218 }
3219 l4len = tcp_hdrlen(skb);
3220 *hdr_len += l4len;
3221
3222 if (skb->protocol == htons(ETH_P_IP)) {
3223 struct iphdr *iph = ip_hdr(skb);
3224 iph->tot_len = 0;
3225 iph->check = 0;
3226 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
3227 iph->daddr, 0,
3228 IPPROTO_TCP,
3229 0);
3230 adapter->hw_tso_ctxt++;
3231 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
3232 ipv6_hdr(skb)->payload_len = 0;
3233 tcp_hdr(skb)->check =
3234 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
3235 &ipv6_hdr(skb)->daddr,
3236 0, IPPROTO_TCP, 0);
3237 adapter->hw_tso6_ctxt++;
3238 }
3239
3240 i = tx_ring->next_to_use;
3241
3242 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3243 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
3244
3245 /* VLAN MACLEN IPLEN */
3246 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3247 vlan_macip_lens |=
3248 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
3249 vlan_macip_lens |= ((skb_network_offset(skb)) <<
3250 IXGBE_ADVTXD_MACLEN_SHIFT);
3251 *hdr_len += skb_network_offset(skb);
3252 vlan_macip_lens |=
3253 (skb_transport_header(skb) - skb_network_header(skb));
3254 *hdr_len +=
3255 (skb_transport_header(skb) - skb_network_header(skb));
3256 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
3257 context_desc->seqnum_seed = 0;
3258
3259 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
3260 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
3261 IXGBE_ADVTXD_DTYP_CTXT);
3262
3263 if (skb->protocol == htons(ETH_P_IP))
3264 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
3265 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
3266 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
3267
3268 /* MSS L4LEN IDX */
3269 mss_l4len_idx |=
3270 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
3271 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
3272 /* use index 1 for TSO */
3273 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
3274 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
3275
3276 tx_buffer_info->time_stamp = jiffies;
3277 tx_buffer_info->next_to_watch = i;
3278
3279 i++;
3280 if (i == tx_ring->count)
3281 i = 0;
3282 tx_ring->next_to_use = i;
3283
3284 return true;
3285 }
3286 return false;
3287 }
3288
3289 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
3290 struct ixgbe_ring *tx_ring,
3291 struct sk_buff *skb, u32 tx_flags)
3292 {
3293 struct ixgbe_adv_tx_context_desc *context_desc;
3294 unsigned int i;
3295 struct ixgbe_tx_buffer *tx_buffer_info;
3296 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
3297
3298 if (skb->ip_summed == CHECKSUM_PARTIAL ||
3299 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
3300 i = tx_ring->next_to_use;
3301 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3302 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
3303
3304 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3305 vlan_macip_lens |=
3306 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
3307 vlan_macip_lens |= (skb_network_offset(skb) <<
3308 IXGBE_ADVTXD_MACLEN_SHIFT);
3309 if (skb->ip_summed == CHECKSUM_PARTIAL)
3310 vlan_macip_lens |= (skb_transport_header(skb) -
3311 skb_network_header(skb));
3312
3313 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
3314 context_desc->seqnum_seed = 0;
3315
3316 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
3317 IXGBE_ADVTXD_DTYP_CTXT);
3318
3319 if (skb->ip_summed == CHECKSUM_PARTIAL) {
3320 switch (skb->protocol) {
3321 case __constant_htons(ETH_P_IP):
3322 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
3323 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
3324 type_tucmd_mlhl |=
3325 IXGBE_ADVTXD_TUCMD_L4T_TCP;
3326 break;
3327
3328 case __constant_htons(ETH_P_IPV6):
3329 /* XXX what about other V6 headers?? */
3330 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
3331 type_tucmd_mlhl |=
3332 IXGBE_ADVTXD_TUCMD_L4T_TCP;
3333 break;
3334
3335 default:
3336 if (unlikely(net_ratelimit())) {
3337 DPRINTK(PROBE, WARNING,
3338 "partial checksum but proto=%x!\n",
3339 skb->protocol);
3340 }
3341 break;
3342 }
3343 }
3344
3345 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
3346 /* use index zero for tx checksum offload */
3347 context_desc->mss_l4len_idx = 0;
3348
3349 tx_buffer_info->time_stamp = jiffies;
3350 tx_buffer_info->next_to_watch = i;
3351 adapter->hw_csum_tx_good++;
3352 i++;
3353 if (i == tx_ring->count)
3354 i = 0;
3355 tx_ring->next_to_use = i;
3356
3357 return true;
3358 }
3359 return false;
3360 }
3361
3362 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
3363 struct ixgbe_ring *tx_ring,
3364 struct sk_buff *skb, unsigned int first)
3365 {
3366 struct ixgbe_tx_buffer *tx_buffer_info;
3367 unsigned int len = skb->len;
3368 unsigned int offset = 0, size, count = 0, i;
3369 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
3370 unsigned int f;
3371
3372 len -= skb->data_len;
3373
3374 i = tx_ring->next_to_use;
3375
3376 while (len) {
3377 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3378 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
3379
3380 tx_buffer_info->length = size;
3381 tx_buffer_info->dma = pci_map_single(adapter->pdev,
3382 skb->data + offset,
3383 size, PCI_DMA_TODEVICE);
3384 tx_buffer_info->time_stamp = jiffies;
3385 tx_buffer_info->next_to_watch = i;
3386
3387 len -= size;
3388 offset += size;
3389 count++;
3390 i++;
3391 if (i == tx_ring->count)
3392 i = 0;
3393 }
3394
3395 for (f = 0; f < nr_frags; f++) {
3396 struct skb_frag_struct *frag;
3397
3398 frag = &skb_shinfo(skb)->frags[f];
3399 len = frag->size;
3400 offset = frag->page_offset;
3401
3402 while (len) {
3403 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3404 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
3405
3406 tx_buffer_info->length = size;
3407 tx_buffer_info->dma = pci_map_page(adapter->pdev,
3408 frag->page,
3409 offset,
3410 size, PCI_DMA_TODEVICE);
3411 tx_buffer_info->time_stamp = jiffies;
3412 tx_buffer_info->next_to_watch = i;
3413
3414 len -= size;
3415 offset += size;
3416 count++;
3417 i++;
3418 if (i == tx_ring->count)
3419 i = 0;
3420 }
3421 }
3422 if (i == 0)
3423 i = tx_ring->count - 1;
3424 else
3425 i = i - 1;
3426 tx_ring->tx_buffer_info[i].skb = skb;
3427 tx_ring->tx_buffer_info[first].next_to_watch = i;
3428
3429 return count;
3430 }
3431
3432 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
3433 struct ixgbe_ring *tx_ring,
3434 int tx_flags, int count, u32 paylen, u8 hdr_len)
3435 {
3436 union ixgbe_adv_tx_desc *tx_desc = NULL;
3437 struct ixgbe_tx_buffer *tx_buffer_info;
3438 u32 olinfo_status = 0, cmd_type_len = 0;
3439 unsigned int i;
3440 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
3441
3442 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
3443
3444 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
3445
3446 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3447 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
3448
3449 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
3450 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
3451
3452 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
3453 IXGBE_ADVTXD_POPTS_SHIFT;
3454
3455 /* use index 1 context for tso */
3456 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
3457 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
3458 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
3459 IXGBE_ADVTXD_POPTS_SHIFT;
3460
3461 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
3462 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
3463 IXGBE_ADVTXD_POPTS_SHIFT;
3464
3465 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
3466
3467 i = tx_ring->next_to_use;
3468 while (count--) {
3469 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3470 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
3471 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
3472 tx_desc->read.cmd_type_len =
3473 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
3474 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
3475
3476 i++;
3477 if (i == tx_ring->count)
3478 i = 0;
3479 }
3480
3481 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
3482
3483 /*
3484 * Force memory writes to complete before letting h/w
3485 * know there are new descriptors to fetch. (Only
3486 * applicable for weak-ordered memory model archs,
3487 * such as IA-64).
3488 */
3489 wmb();
3490
3491 tx_ring->next_to_use = i;
3492 writel(i, adapter->hw.hw_addr + tx_ring->tail);
3493 }
3494
3495 static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
3496 struct ixgbe_ring *tx_ring, int size)
3497 {
3498 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3499
3500 netif_stop_subqueue(netdev, tx_ring->queue_index);
3501 /* Herbert's original patch had:
3502 * smp_mb__after_netif_stop_queue();
3503 * but since that doesn't exist yet, just open code it. */
3504 smp_mb();
3505
3506 /* We need to check again in a case another CPU has just
3507 * made room available. */
3508 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
3509 return -EBUSY;
3510
3511 /* A reprieve! - use start_queue because it doesn't call schedule */
3512 netif_start_subqueue(netdev, tx_ring->queue_index);
3513 ++adapter->restart_queue;
3514 return 0;
3515 }
3516
3517 static int ixgbe_maybe_stop_tx(struct net_device *netdev,
3518 struct ixgbe_ring *tx_ring, int size)
3519 {
3520 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
3521 return 0;
3522 return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
3523 }
3524
3525
3526 static int ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3527 {
3528 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3529 struct ixgbe_ring *tx_ring;
3530 unsigned int len = skb->len;
3531 unsigned int first;
3532 unsigned int tx_flags = 0;
3533 u8 hdr_len = 0;
3534 int r_idx = 0, tso;
3535 unsigned int mss = 0;
3536 int count = 0;
3537 unsigned int f;
3538 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
3539 len -= skb->data_len;
3540 r_idx = (adapter->num_tx_queues - 1) & skb->queue_mapping;
3541 tx_ring = &adapter->tx_ring[r_idx];
3542
3543
3544 if (skb->len <= 0) {
3545 dev_kfree_skb(skb);
3546 return NETDEV_TX_OK;
3547 }
3548 mss = skb_shinfo(skb)->gso_size;
3549
3550 if (mss)
3551 count++;
3552 else if (skb->ip_summed == CHECKSUM_PARTIAL)
3553 count++;
3554
3555 count += TXD_USE_COUNT(len);
3556 for (f = 0; f < nr_frags; f++)
3557 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
3558
3559 if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
3560 adapter->tx_busy++;
3561 return NETDEV_TX_BUSY;
3562 }
3563 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
3564 tx_flags |= IXGBE_TX_FLAGS_VLAN;
3565 tx_flags |= (vlan_tx_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT);
3566 }
3567
3568 if (skb->protocol == htons(ETH_P_IP))
3569 tx_flags |= IXGBE_TX_FLAGS_IPV4;
3570 first = tx_ring->next_to_use;
3571 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
3572 if (tso < 0) {
3573 dev_kfree_skb_any(skb);
3574 return NETDEV_TX_OK;
3575 }
3576
3577 if (tso)
3578 tx_flags |= IXGBE_TX_FLAGS_TSO;
3579 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
3580 (skb->ip_summed == CHECKSUM_PARTIAL))
3581 tx_flags |= IXGBE_TX_FLAGS_CSUM;
3582
3583 ixgbe_tx_queue(adapter, tx_ring, tx_flags,
3584 ixgbe_tx_map(adapter, tx_ring, skb, first),
3585 skb->len, hdr_len);
3586
3587 netdev->trans_start = jiffies;
3588
3589 ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
3590
3591 return NETDEV_TX_OK;
3592 }
3593
3594 /**
3595 * ixgbe_get_stats - Get System Network Statistics
3596 * @netdev: network interface device structure
3597 *
3598 * Returns the address of the device statistics structure.
3599 * The statistics are actually updated from the timer callback.
3600 **/
3601 static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
3602 {
3603 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3604
3605 /* only return the current stats */
3606 return &adapter->net_stats;
3607 }
3608
3609 /**
3610 * ixgbe_set_mac - Change the Ethernet Address of the NIC
3611 * @netdev: network interface device structure
3612 * @p: pointer to an address structure
3613 *
3614 * Returns 0 on success, negative on failure
3615 **/
3616 static int ixgbe_set_mac(struct net_device *netdev, void *p)
3617 {
3618 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3619 struct sockaddr *addr = p;
3620
3621 if (!is_valid_ether_addr(addr->sa_data))
3622 return -EADDRNOTAVAIL;
3623
3624 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3625 memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
3626
3627 adapter->hw.mac.ops.set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV);
3628
3629 return 0;
3630 }
3631
3632 #ifdef CONFIG_NET_POLL_CONTROLLER
3633 /*
3634 * Polling 'interrupt' - used by things like netconsole to send skbs
3635 * without having to re-enable interrupts. It's not called while
3636 * the interrupt routine is executing.
3637 */
3638 static void ixgbe_netpoll(struct net_device *netdev)
3639 {
3640 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3641
3642 disable_irq(adapter->pdev->irq);
3643 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
3644 ixgbe_intr(adapter->pdev->irq, netdev);
3645 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
3646 enable_irq(adapter->pdev->irq);
3647 }
3648 #endif
3649
3650 /**
3651 * ixgbe_link_config - set up initial link with default speed and duplex
3652 * @hw: pointer to private hardware struct
3653 *
3654 * Returns 0 on success, negative on failure
3655 **/
3656 static int ixgbe_link_config(struct ixgbe_hw *hw)
3657 {
3658 u32 autoneg = IXGBE_LINK_SPEED_10GB_FULL;
3659
3660 /* must always autoneg for both 1G and 10G link */
3661 hw->mac.autoneg = true;
3662
3663 return hw->mac.ops.setup_link_speed(hw, autoneg, true, true);
3664 }
3665
3666 /**
3667 * ixgbe_napi_add_all - prep napi structs for use
3668 * @adapter: private struct
3669 * helper function to napi_add each possible q_vector->napi
3670 */
3671 static void ixgbe_napi_add_all(struct ixgbe_adapter *adapter)
3672 {
3673 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3674 int (*poll)(struct napi_struct *, int);
3675
3676 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3677 poll = &ixgbe_clean_rxonly;
3678 } else {
3679 poll = &ixgbe_poll;
3680 /* only one q_vector for legacy modes */
3681 q_vectors = 1;
3682 }
3683
3684 for (i = 0; i < q_vectors; i++) {
3685 struct ixgbe_q_vector *q_vector = &adapter->q_vector[i];
3686 netif_napi_add(adapter->netdev, &q_vector->napi,
3687 (*poll), 64);
3688 }
3689 }
3690
3691 /**
3692 * ixgbe_probe - Device Initialization Routine
3693 * @pdev: PCI device information struct
3694 * @ent: entry in ixgbe_pci_tbl
3695 *
3696 * Returns 0 on success, negative on failure
3697 *
3698 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
3699 * The OS initialization, configuring of the adapter private structure,
3700 * and a hardware reset occur.
3701 **/
3702 static int __devinit ixgbe_probe(struct pci_dev *pdev,
3703 const struct pci_device_id *ent)
3704 {
3705 struct net_device *netdev;
3706 struct ixgbe_adapter *adapter = NULL;
3707 struct ixgbe_hw *hw;
3708 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
3709 static int cards_found;
3710 int i, err, pci_using_dac;
3711 u16 link_status, link_speed, link_width;
3712 u32 part_num, eec;
3713
3714 err = pci_enable_device(pdev);
3715 if (err)
3716 return err;
3717
3718 if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK) &&
3719 !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) {
3720 pci_using_dac = 1;
3721 } else {
3722 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
3723 if (err) {
3724 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
3725 if (err) {
3726 dev_err(&pdev->dev, "No usable DMA configuration, "
3727 "aborting\n");
3728 goto err_dma;
3729 }
3730 }
3731 pci_using_dac = 0;
3732 }
3733
3734 err = pci_request_regions(pdev, ixgbe_driver_name);
3735 if (err) {
3736 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
3737 goto err_pci_reg;
3738 }
3739
3740 pci_set_master(pdev);
3741 pci_save_state(pdev);
3742
3743 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES);
3744 if (!netdev) {
3745 err = -ENOMEM;
3746 goto err_alloc_etherdev;
3747 }
3748
3749 SET_NETDEV_DEV(netdev, &pdev->dev);
3750
3751 pci_set_drvdata(pdev, netdev);
3752 adapter = netdev_priv(netdev);
3753
3754 adapter->netdev = netdev;
3755 adapter->pdev = pdev;
3756 hw = &adapter->hw;
3757 hw->back = adapter;
3758 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
3759
3760 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
3761 pci_resource_len(pdev, 0));
3762 if (!hw->hw_addr) {
3763 err = -EIO;
3764 goto err_ioremap;
3765 }
3766
3767 for (i = 1; i <= 5; i++) {
3768 if (pci_resource_len(pdev, i) == 0)
3769 continue;
3770 }
3771
3772 netdev->open = &ixgbe_open;
3773 netdev->stop = &ixgbe_close;
3774 netdev->hard_start_xmit = &ixgbe_xmit_frame;
3775 netdev->get_stats = &ixgbe_get_stats;
3776 netdev->set_rx_mode = &ixgbe_set_rx_mode;
3777 netdev->set_multicast_list = &ixgbe_set_rx_mode;
3778 netdev->set_mac_address = &ixgbe_set_mac;
3779 netdev->change_mtu = &ixgbe_change_mtu;
3780 ixgbe_set_ethtool_ops(netdev);
3781 netdev->tx_timeout = &ixgbe_tx_timeout;
3782 netdev->watchdog_timeo = 5 * HZ;
3783 netdev->vlan_rx_register = ixgbe_vlan_rx_register;
3784 netdev->vlan_rx_add_vid = ixgbe_vlan_rx_add_vid;
3785 netdev->vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid;
3786 #ifdef CONFIG_NET_POLL_CONTROLLER
3787 netdev->poll_controller = ixgbe_netpoll;
3788 #endif
3789 strcpy(netdev->name, pci_name(pdev));
3790
3791 adapter->bd_number = cards_found;
3792
3793 /* Setup hw api */
3794 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
3795 hw->mac.type = ii->mac;
3796
3797 /* EEPROM */
3798 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
3799 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
3800 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
3801 if (!(eec & (1 << 8)))
3802 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
3803
3804 /* PHY */
3805 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
3806 /* phy->sfp_type = ixgbe_sfp_type_unknown; */
3807
3808 err = ii->get_invariants(hw);
3809 if (err)
3810 goto err_hw_init;
3811
3812 /* setup the private structure */
3813 err = ixgbe_sw_init(adapter);
3814 if (err)
3815 goto err_sw_init;
3816
3817 /* reset_hw fills in the perm_addr as well */
3818 err = hw->mac.ops.reset_hw(hw);
3819 if (err) {
3820 dev_err(&adapter->pdev->dev, "HW Init failed: %d\n", err);
3821 goto err_sw_init;
3822 }
3823
3824 netdev->features = NETIF_F_SG |
3825 NETIF_F_IP_CSUM |
3826 NETIF_F_HW_VLAN_TX |
3827 NETIF_F_HW_VLAN_RX |
3828 NETIF_F_HW_VLAN_FILTER;
3829
3830 netdev->features |= NETIF_F_IPV6_CSUM;
3831 netdev->features |= NETIF_F_TSO;
3832 netdev->features |= NETIF_F_TSO6;
3833 netdev->features |= NETIF_F_LRO;
3834
3835 netdev->vlan_features |= NETIF_F_TSO;
3836 netdev->vlan_features |= NETIF_F_TSO6;
3837 netdev->vlan_features |= NETIF_F_IP_CSUM;
3838 netdev->vlan_features |= NETIF_F_SG;
3839
3840 if (pci_using_dac)
3841 netdev->features |= NETIF_F_HIGHDMA;
3842
3843 /* make sure the EEPROM is good */
3844 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
3845 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
3846 err = -EIO;
3847 goto err_eeprom;
3848 }
3849
3850 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
3851 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
3852
3853 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
3854 dev_err(&pdev->dev, "invalid MAC address\n");
3855 err = -EIO;
3856 goto err_eeprom;
3857 }
3858
3859 init_timer(&adapter->watchdog_timer);
3860 adapter->watchdog_timer.function = &ixgbe_watchdog;
3861 adapter->watchdog_timer.data = (unsigned long)adapter;
3862
3863 INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
3864 INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
3865
3866 err = ixgbe_init_interrupt_scheme(adapter);
3867 if (err)
3868 goto err_sw_init;
3869
3870 /* print bus type/speed/width info */
3871 pci_read_config_word(pdev, IXGBE_PCI_LINK_STATUS, &link_status);
3872 link_speed = link_status & IXGBE_PCI_LINK_SPEED;
3873 link_width = link_status & IXGBE_PCI_LINK_WIDTH;
3874 dev_info(&pdev->dev, "(PCI Express:%s:%s) "
3875 "%02x:%02x:%02x:%02x:%02x:%02x\n",
3876 ((link_speed == IXGBE_PCI_LINK_SPEED_5000) ? "5.0Gb/s" :
3877 (link_speed == IXGBE_PCI_LINK_SPEED_2500) ? "2.5Gb/s" :
3878 "Unknown"),
3879 ((link_width == IXGBE_PCI_LINK_WIDTH_8) ? "Width x8" :
3880 (link_width == IXGBE_PCI_LINK_WIDTH_4) ? "Width x4" :
3881 (link_width == IXGBE_PCI_LINK_WIDTH_2) ? "Width x2" :
3882 (link_width == IXGBE_PCI_LINK_WIDTH_1) ? "Width x1" :
3883 "Unknown"),
3884 netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2],
3885 netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5]);
3886 ixgbe_read_pba_num_generic(hw, &part_num);
3887 dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
3888 hw->mac.type, hw->phy.type,
3889 (part_num >> 8), (part_num & 0xff));
3890
3891 if (link_width <= IXGBE_PCI_LINK_WIDTH_4) {
3892 dev_warn(&pdev->dev, "PCI-Express bandwidth available for "
3893 "this card is not sufficient for optimal "
3894 "performance.\n");
3895 dev_warn(&pdev->dev, "For optimal performance a x8 "
3896 "PCI-Express slot is required.\n");
3897 }
3898
3899 /* reset the hardware with the new settings */
3900 hw->mac.ops.start_hw(hw);
3901
3902 /* link_config depends on start_hw being called at least once */
3903 err = ixgbe_link_config(hw);
3904 if (err) {
3905 dev_err(&pdev->dev, "setup_link_speed FAILED %d\n", err);
3906 goto err_register;
3907 }
3908
3909 netif_carrier_off(netdev);
3910 netif_tx_stop_all_queues(netdev);
3911
3912 ixgbe_napi_add_all(adapter);
3913
3914 strcpy(netdev->name, "eth%d");
3915 err = register_netdev(netdev);
3916 if (err)
3917 goto err_register;
3918
3919 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
3920 if (dca_add_requester(&pdev->dev) == 0) {
3921 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
3922 /* always use CB2 mode, difference is masked
3923 * in the CB driver */
3924 IXGBE_WRITE_REG(hw, IXGBE_DCA_CTRL, 2);
3925 ixgbe_setup_dca(adapter);
3926 }
3927 #endif
3928
3929 dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
3930 cards_found++;
3931 return 0;
3932
3933 err_register:
3934 ixgbe_release_hw_control(adapter);
3935 err_hw_init:
3936 err_sw_init:
3937 ixgbe_reset_interrupt_capability(adapter);
3938 err_eeprom:
3939 iounmap(hw->hw_addr);
3940 err_ioremap:
3941 free_netdev(netdev);
3942 err_alloc_etherdev:
3943 pci_release_regions(pdev);
3944 err_pci_reg:
3945 err_dma:
3946 pci_disable_device(pdev);
3947 return err;
3948 }
3949
3950 /**
3951 * ixgbe_remove - Device Removal Routine
3952 * @pdev: PCI device information struct
3953 *
3954 * ixgbe_remove is called by the PCI subsystem to alert the driver
3955 * that it should release a PCI device. The could be caused by a
3956 * Hot-Plug event, or because the driver is going to be removed from
3957 * memory.
3958 **/
3959 static void __devexit ixgbe_remove(struct pci_dev *pdev)
3960 {
3961 struct net_device *netdev = pci_get_drvdata(pdev);
3962 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3963
3964 set_bit(__IXGBE_DOWN, &adapter->state);
3965 del_timer_sync(&adapter->watchdog_timer);
3966
3967 flush_scheduled_work();
3968
3969 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
3970 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
3971 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
3972 dca_remove_requester(&pdev->dev);
3973 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
3974 }
3975
3976 #endif
3977 unregister_netdev(netdev);
3978
3979 ixgbe_reset_interrupt_capability(adapter);
3980
3981 ixgbe_release_hw_control(adapter);
3982
3983 iounmap(adapter->hw.hw_addr);
3984 pci_release_regions(pdev);
3985
3986 DPRINTK(PROBE, INFO, "complete\n");
3987 kfree(adapter->tx_ring);
3988 kfree(adapter->rx_ring);
3989
3990 free_netdev(netdev);
3991
3992 pci_disable_device(pdev);
3993 }
3994
3995 /**
3996 * ixgbe_io_error_detected - called when PCI error is detected
3997 * @pdev: Pointer to PCI device
3998 * @state: The current pci connection state
3999 *
4000 * This function is called after a PCI bus error affecting
4001 * this device has been detected.
4002 */
4003 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
4004 pci_channel_state_t state)
4005 {
4006 struct net_device *netdev = pci_get_drvdata(pdev);
4007 struct ixgbe_adapter *adapter = netdev->priv;
4008
4009 netif_device_detach(netdev);
4010
4011 if (netif_running(netdev))
4012 ixgbe_down(adapter);
4013 pci_disable_device(pdev);
4014
4015 /* Request a slot slot reset. */
4016 return PCI_ERS_RESULT_NEED_RESET;
4017 }
4018
4019 /**
4020 * ixgbe_io_slot_reset - called after the pci bus has been reset.
4021 * @pdev: Pointer to PCI device
4022 *
4023 * Restart the card from scratch, as if from a cold-boot.
4024 */
4025 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
4026 {
4027 struct net_device *netdev = pci_get_drvdata(pdev);
4028 struct ixgbe_adapter *adapter = netdev->priv;
4029
4030 if (pci_enable_device(pdev)) {
4031 DPRINTK(PROBE, ERR,
4032 "Cannot re-enable PCI device after reset.\n");
4033 return PCI_ERS_RESULT_DISCONNECT;
4034 }
4035 pci_set_master(pdev);
4036 pci_restore_state(pdev);
4037
4038 pci_enable_wake(pdev, PCI_D3hot, 0);
4039 pci_enable_wake(pdev, PCI_D3cold, 0);
4040
4041 ixgbe_reset(adapter);
4042
4043 return PCI_ERS_RESULT_RECOVERED;
4044 }
4045
4046 /**
4047 * ixgbe_io_resume - called when traffic can start flowing again.
4048 * @pdev: Pointer to PCI device
4049 *
4050 * This callback is called when the error recovery driver tells us that
4051 * its OK to resume normal operation.
4052 */
4053 static void ixgbe_io_resume(struct pci_dev *pdev)
4054 {
4055 struct net_device *netdev = pci_get_drvdata(pdev);
4056 struct ixgbe_adapter *adapter = netdev->priv;
4057
4058 if (netif_running(netdev)) {
4059 if (ixgbe_up(adapter)) {
4060 DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
4061 return;
4062 }
4063 }
4064
4065 netif_device_attach(netdev);
4066
4067 }
4068
4069 static struct pci_error_handlers ixgbe_err_handler = {
4070 .error_detected = ixgbe_io_error_detected,
4071 .slot_reset = ixgbe_io_slot_reset,
4072 .resume = ixgbe_io_resume,
4073 };
4074
4075 static struct pci_driver ixgbe_driver = {
4076 .name = ixgbe_driver_name,
4077 .id_table = ixgbe_pci_tbl,
4078 .probe = ixgbe_probe,
4079 .remove = __devexit_p(ixgbe_remove),
4080 #ifdef CONFIG_PM
4081 .suspend = ixgbe_suspend,
4082 .resume = ixgbe_resume,
4083 #endif
4084 .shutdown = ixgbe_shutdown,
4085 .err_handler = &ixgbe_err_handler
4086 };
4087
4088 /**
4089 * ixgbe_init_module - Driver Registration Routine
4090 *
4091 * ixgbe_init_module is the first routine called when the driver is
4092 * loaded. All it does is register with the PCI subsystem.
4093 **/
4094 static int __init ixgbe_init_module(void)
4095 {
4096 int ret;
4097 printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
4098 ixgbe_driver_string, ixgbe_driver_version);
4099
4100 printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
4101
4102 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
4103 dca_register_notify(&dca_notifier);
4104
4105 #endif
4106 ret = pci_register_driver(&ixgbe_driver);
4107 return ret;
4108 }
4109 module_init(ixgbe_init_module);
4110
4111 /**
4112 * ixgbe_exit_module - Driver Exit Cleanup Routine
4113 *
4114 * ixgbe_exit_module is called just before the driver is removed
4115 * from memory.
4116 **/
4117 static void __exit ixgbe_exit_module(void)
4118 {
4119 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
4120 dca_unregister_notify(&dca_notifier);
4121 #endif
4122 pci_unregister_driver(&ixgbe_driver);
4123 }
4124
4125 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
4126 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
4127 void *p)
4128 {
4129 int ret_val;
4130
4131 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
4132 __ixgbe_notify_dca);
4133
4134 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
4135 }
4136 #endif /* CONFIG_DCA or CONFIG_DCA_MODULE */
4137
4138 module_exit(ixgbe_exit_module);
4139
4140 /* ixgbe_main.c */
Support for the Chinese Samsung S3C2440 based development boards