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ixgbe: bump version
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / ixgbe / ixgbe_main.c
blobb513911809079b4f93db4aa1ca068c96ff63e898
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 "1.3.30-k2"
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 pci_dev *pdev = adapter->pdev;
486 union ixgbe_adv_rx_desc *rx_desc;
487 struct ixgbe_rx_buffer *bi;
488 unsigned int i;
489 unsigned int bufsz = rx_ring->rx_buf_len + NET_IP_ALIGN;
490
491 i = rx_ring->next_to_use;
492 bi = &rx_ring->rx_buffer_info[i];
493
494 while (cleaned_count--) {
495 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
496
497 if (!bi->page_dma &&
498 (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) {
499 if (!bi->page) {
500 bi->page = alloc_page(GFP_ATOMIC);
501 if (!bi->page) {
502 adapter->alloc_rx_page_failed++;
503 goto no_buffers;
504 }
505 bi->page_offset = 0;
506 } else {
507 /* use a half page if we're re-using */
508 bi->page_offset ^= (PAGE_SIZE / 2);
509 }
510
511 bi->page_dma = pci_map_page(pdev, bi->page,
512 bi->page_offset,
513 (PAGE_SIZE / 2),
514 PCI_DMA_FROMDEVICE);
515 }
516
517 if (!bi->skb) {
518 struct sk_buff *skb = netdev_alloc_skb(adapter->netdev,
519 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 pci_dev *pdev = adapter->pdev;
584 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
585 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
586 struct sk_buff *skb;
587 unsigned int i;
588 u32 len, staterr;
589 u16 hdr_info;
590 bool cleaned = false;
591 int cleaned_count = 0;
592 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
593
594 i = rx_ring->next_to_clean;
595 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
596 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
597 rx_buffer_info = &rx_ring->rx_buffer_info[i];
598
599 while (staterr & IXGBE_RXD_STAT_DD) {
600 u32 upper_len = 0;
601 if (*work_done >= work_to_do)
602 break;
603 (*work_done)++;
604
605 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
606 hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
607 len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
608 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
609 if (hdr_info & IXGBE_RXDADV_SPH)
610 adapter->rx_hdr_split++;
611 if (len > IXGBE_RX_HDR_SIZE)
612 len = IXGBE_RX_HDR_SIZE;
613 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
614 } else {
615 len = le16_to_cpu(rx_desc->wb.upper.length);
616 }
617
618 cleaned = true;
619 skb = rx_buffer_info->skb;
620 prefetch(skb->data - NET_IP_ALIGN);
621 rx_buffer_info->skb = NULL;
622
623 if (len && !skb_shinfo(skb)->nr_frags) {
624 pci_unmap_single(pdev, rx_buffer_info->dma,
625 rx_ring->rx_buf_len + NET_IP_ALIGN,
626 PCI_DMA_FROMDEVICE);
627 skb_put(skb, len);
628 }
629
630 if (upper_len) {
631 pci_unmap_page(pdev, rx_buffer_info->page_dma,
632 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
633 rx_buffer_info->page_dma = 0;
634 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
635 rx_buffer_info->page,
636 rx_buffer_info->page_offset,
637 upper_len);
638
639 if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
640 (page_count(rx_buffer_info->page) != 1))
641 rx_buffer_info->page = NULL;
642 else
643 get_page(rx_buffer_info->page);
644
645 skb->len += upper_len;
646 skb->data_len += upper_len;
647 skb->truesize += upper_len;
648 }
649
650 i++;
651 if (i == rx_ring->count)
652 i = 0;
653 next_buffer = &rx_ring->rx_buffer_info[i];
654
655 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
656 prefetch(next_rxd);
657
658 cleaned_count++;
659 if (staterr & IXGBE_RXD_STAT_EOP) {
660 rx_ring->stats.packets++;
661 rx_ring->stats.bytes += skb->len;
662 } else {
663 rx_buffer_info->skb = next_buffer->skb;
664 rx_buffer_info->dma = next_buffer->dma;
665 next_buffer->skb = skb;
666 next_buffer->dma = 0;
667 adapter->non_eop_descs++;
668 goto next_desc;
669 }
670
671 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
672 dev_kfree_skb_irq(skb);
673 goto next_desc;
674 }
675
676 ixgbe_rx_checksum(adapter, staterr, skb);
677
678 /* probably a little skewed due to removing CRC */
679 total_rx_bytes += skb->len;
680 total_rx_packets++;
681
682 skb->protocol = eth_type_trans(skb, adapter->netdev);
683 ixgbe_receive_skb(adapter, skb, staterr, rx_ring, rx_desc);
684 adapter->netdev->last_rx = jiffies;
685
686 next_desc:
687 rx_desc->wb.upper.status_error = 0;
688
689 /* return some buffers to hardware, one at a time is too slow */
690 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
691 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
692 cleaned_count = 0;
693 }
694
695 /* use prefetched values */
696 rx_desc = next_rxd;
697 rx_buffer_info = next_buffer;
698
699 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
700 }
701
702 if (rx_ring->lro_used) {
703 lro_flush_all(&rx_ring->lro_mgr);
704 rx_ring->lro_used = false;
705 }
706
707 rx_ring->next_to_clean = i;
708 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
709
710 if (cleaned_count)
711 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
712
713 rx_ring->total_packets += total_rx_packets;
714 rx_ring->total_bytes += total_rx_bytes;
715 adapter->net_stats.rx_bytes += total_rx_bytes;
716 adapter->net_stats.rx_packets += total_rx_packets;
717
718 return cleaned;
719 }
720
721 static int ixgbe_clean_rxonly(struct napi_struct *, int);
722 /**
723 * ixgbe_configure_msix - Configure MSI-X hardware
724 * @adapter: board private structure
725 *
726 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
727 * interrupts.
728 **/
729 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
730 {
731 struct ixgbe_q_vector *q_vector;
732 int i, j, q_vectors, v_idx, r_idx;
733 u32 mask;
734
735 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
736
737 /* Populate the IVAR table and set the ITR values to the
738 * corresponding register.
739 */
740 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
741 q_vector = &adapter->q_vector[v_idx];
742 /* XXX for_each_bit(...) */
743 r_idx = find_first_bit(q_vector->rxr_idx,
744 adapter->num_rx_queues);
745
746 for (i = 0; i < q_vector->rxr_count; i++) {
747 j = adapter->rx_ring[r_idx].reg_idx;
748 ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(j), v_idx);
749 r_idx = find_next_bit(q_vector->rxr_idx,
750 adapter->num_rx_queues,
751 r_idx + 1);
752 }
753 r_idx = find_first_bit(q_vector->txr_idx,
754 adapter->num_tx_queues);
755
756 for (i = 0; i < q_vector->txr_count; i++) {
757 j = adapter->tx_ring[r_idx].reg_idx;
758 ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(j), v_idx);
759 r_idx = find_next_bit(q_vector->txr_idx,
760 adapter->num_tx_queues,
761 r_idx + 1);
762 }
763
764 /* if this is a tx only vector halve the interrupt rate */
765 if (q_vector->txr_count && !q_vector->rxr_count)
766 q_vector->eitr = (adapter->eitr_param >> 1);
767 else
768 /* rx only */
769 q_vector->eitr = adapter->eitr_param;
770
771 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx),
772 EITR_INTS_PER_SEC_TO_REG(q_vector->eitr));
773 }
774
775 ixgbe_set_ivar(adapter, IXGBE_IVAR_OTHER_CAUSES_INDEX, v_idx);
776 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
777
778 /* set up to autoclear timer, and the vectors */
779 mask = IXGBE_EIMS_ENABLE_MASK;
780 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
781 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
782 }
783
784 enum latency_range {
785 lowest_latency = 0,
786 low_latency = 1,
787 bulk_latency = 2,
788 latency_invalid = 255
789 };
790
791 /**
792 * ixgbe_update_itr - update the dynamic ITR value based on statistics
793 * @adapter: pointer to adapter
794 * @eitr: eitr setting (ints per sec) to give last timeslice
795 * @itr_setting: current throttle rate in ints/second
796 * @packets: the number of packets during this measurement interval
797 * @bytes: the number of bytes during this measurement interval
798 *
799 * Stores a new ITR value based on packets and byte
800 * counts during the last interrupt. The advantage of per interrupt
801 * computation is faster updates and more accurate ITR for the current
802 * traffic pattern. Constants in this function were computed
803 * based on theoretical maximum wire speed and thresholds were set based
804 * on testing data as well as attempting to minimize response time
805 * while increasing bulk throughput.
806 * this functionality is controlled by the InterruptThrottleRate module
807 * parameter (see ixgbe_param.c)
808 **/
809 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
810 u32 eitr, u8 itr_setting,
811 int packets, int bytes)
812 {
813 unsigned int retval = itr_setting;
814 u32 timepassed_us;
815 u64 bytes_perint;
816
817 if (packets == 0)
818 goto update_itr_done;
819
820
821 /* simple throttlerate management
822 * 0-20MB/s lowest (100000 ints/s)
823 * 20-100MB/s low (20000 ints/s)
824 * 100-1249MB/s bulk (8000 ints/s)
825 */
826 /* what was last interrupt timeslice? */
827 timepassed_us = 1000000/eitr;
828 bytes_perint = bytes / timepassed_us; /* bytes/usec */
829
830 switch (itr_setting) {
831 case lowest_latency:
832 if (bytes_perint > adapter->eitr_low)
833 retval = low_latency;
834 break;
835 case low_latency:
836 if (bytes_perint > adapter->eitr_high)
837 retval = bulk_latency;
838 else if (bytes_perint <= adapter->eitr_low)
839 retval = lowest_latency;
840 break;
841 case bulk_latency:
842 if (bytes_perint <= adapter->eitr_high)
843 retval = low_latency;
844 break;
845 }
846
847 update_itr_done:
848 return retval;
849 }
850
851 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
852 {
853 struct ixgbe_adapter *adapter = q_vector->adapter;
854 struct ixgbe_hw *hw = &adapter->hw;
855 u32 new_itr;
856 u8 current_itr, ret_itr;
857 int i, r_idx, v_idx = ((void *)q_vector - (void *)(adapter->q_vector)) /
858 sizeof(struct ixgbe_q_vector);
859 struct ixgbe_ring *rx_ring, *tx_ring;
860
861 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
862 for (i = 0; i < q_vector->txr_count; i++) {
863 tx_ring = &(adapter->tx_ring[r_idx]);
864 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
865 q_vector->tx_itr,
866 tx_ring->total_packets,
867 tx_ring->total_bytes);
868 /* if the result for this queue would decrease interrupt
869 * rate for this vector then use that result */
870 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
871 q_vector->tx_itr - 1 : ret_itr);
872 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
873 r_idx + 1);
874 }
875
876 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
877 for (i = 0; i < q_vector->rxr_count; i++) {
878 rx_ring = &(adapter->rx_ring[r_idx]);
879 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
880 q_vector->rx_itr,
881 rx_ring->total_packets,
882 rx_ring->total_bytes);
883 /* if the result for this queue would decrease interrupt
884 * rate for this vector then use that result */
885 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
886 q_vector->rx_itr - 1 : ret_itr);
887 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
888 r_idx + 1);
889 }
890
891 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
892
893 switch (current_itr) {
894 /* counts and packets in update_itr are dependent on these numbers */
895 case lowest_latency:
896 new_itr = 100000;
897 break;
898 case low_latency:
899 new_itr = 20000; /* aka hwitr = ~200 */
900 break;
901 case bulk_latency:
902 default:
903 new_itr = 8000;
904 break;
905 }
906
907 if (new_itr != q_vector->eitr) {
908 u32 itr_reg;
909 /* do an exponential smoothing */
910 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
911 q_vector->eitr = new_itr;
912 itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr);
913 /* must write high and low 16 bits to reset counter */
914 DPRINTK(TX_ERR, DEBUG, "writing eitr(%d): %08X\n", v_idx,
915 itr_reg);
916 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg | (itr_reg)<<16);
917 }
918
919 return;
920 }
921
922
923 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
924 {
925 struct ixgbe_hw *hw = &adapter->hw;
926
927 adapter->lsc_int++;
928 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
929 adapter->link_check_timeout = jiffies;
930 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
931 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
932 schedule_work(&adapter->watchdog_task);
933 }
934 }
935
936 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
937 {
938 struct net_device *netdev = data;
939 struct ixgbe_adapter *adapter = netdev_priv(netdev);
940 struct ixgbe_hw *hw = &adapter->hw;
941 u32 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
942
943 if (eicr & IXGBE_EICR_LSC)
944 ixgbe_check_lsc(adapter);
945
946 if (!test_bit(__IXGBE_DOWN, &adapter->state))
947 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
948
949 return IRQ_HANDLED;
950 }
951
952 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
953 {
954 struct ixgbe_q_vector *q_vector = data;
955 struct ixgbe_adapter *adapter = q_vector->adapter;
956 struct ixgbe_ring *tx_ring;
957 int i, r_idx;
958
959 if (!q_vector->txr_count)
960 return IRQ_HANDLED;
961
962 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
963 for (i = 0; i < q_vector->txr_count; i++) {
964 tx_ring = &(adapter->tx_ring[r_idx]);
965 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
966 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
967 ixgbe_update_tx_dca(adapter, tx_ring);
968 #endif
969 tx_ring->total_bytes = 0;
970 tx_ring->total_packets = 0;
971 ixgbe_clean_tx_irq(adapter, tx_ring);
972 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
973 r_idx + 1);
974 }
975
976 return IRQ_HANDLED;
977 }
978
979 /**
980 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
981 * @irq: unused
982 * @data: pointer to our q_vector struct for this interrupt vector
983 **/
984 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
985 {
986 struct ixgbe_q_vector *q_vector = data;
987 struct ixgbe_adapter *adapter = q_vector->adapter;
988 struct ixgbe_ring *rx_ring;
989 int r_idx;
990 int i;
991
992 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
993 for (i = 0; i < q_vector->rxr_count; i++) {
994 rx_ring = &(adapter->rx_ring[r_idx]);
995 rx_ring->total_bytes = 0;
996 rx_ring->total_packets = 0;
997 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
998 r_idx + 1);
999 }
1000
1001 if (!q_vector->rxr_count)
1002 return IRQ_HANDLED;
1003
1004 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1005 rx_ring = &(adapter->rx_ring[r_idx]);
1006 /* disable interrupts on this vector only */
1007 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, rx_ring->v_idx);
1008 netif_rx_schedule(adapter->netdev, &q_vector->napi);
1009
1010 return IRQ_HANDLED;
1011 }
1012
1013 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1014 {
1015 ixgbe_msix_clean_rx(irq, data);
1016 ixgbe_msix_clean_tx(irq, data);
1017
1018 return IRQ_HANDLED;
1019 }
1020
1021 /**
1022 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1023 * @napi: napi struct with our devices info in it
1024 * @budget: amount of work driver is allowed to do this pass, in packets
1025 *
1026 * This function is optimized for cleaning one queue only on a single
1027 * q_vector!!!
1028 **/
1029 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1030 {
1031 struct ixgbe_q_vector *q_vector =
1032 container_of(napi, struct ixgbe_q_vector, napi);
1033 struct ixgbe_adapter *adapter = q_vector->adapter;
1034 struct ixgbe_ring *rx_ring = NULL;
1035 int work_done = 0;
1036 long r_idx;
1037
1038 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1039 rx_ring = &(adapter->rx_ring[r_idx]);
1040 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
1041 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1042 ixgbe_update_rx_dca(adapter, rx_ring);
1043 #endif
1044
1045 ixgbe_clean_rx_irq(adapter, rx_ring, &work_done, budget);
1046
1047 /* If all Rx work done, exit the polling mode */
1048 if (work_done < budget) {
1049 netif_rx_complete(adapter->netdev, napi);
1050 if (adapter->itr_setting & 3)
1051 ixgbe_set_itr_msix(q_vector);
1052 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1053 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, rx_ring->v_idx);
1054 }
1055
1056 return work_done;
1057 }
1058
1059 /**
1060 * ixgbe_clean_rxonly_many - msix (aka one shot) rx clean routine
1061 * @napi: napi struct with our devices info in it
1062 * @budget: amount of work driver is allowed to do this pass, in packets
1063 *
1064 * This function will clean more than one rx queue associated with a
1065 * q_vector.
1066 **/
1067 static int ixgbe_clean_rxonly_many(struct napi_struct *napi, int budget)
1068 {
1069 struct ixgbe_q_vector *q_vector =
1070 container_of(napi, struct ixgbe_q_vector, napi);
1071 struct ixgbe_adapter *adapter = q_vector->adapter;
1072 struct ixgbe_ring *rx_ring = NULL;
1073 int work_done = 0, i;
1074 long r_idx;
1075 u16 enable_mask = 0;
1076
1077 /* attempt to distribute budget to each queue fairly, but don't allow
1078 * the budget to go below 1 because we'll exit polling */
1079 budget /= (q_vector->rxr_count ?: 1);
1080 budget = max(budget, 1);
1081 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1082 for (i = 0; i < q_vector->rxr_count; i++) {
1083 rx_ring = &(adapter->rx_ring[r_idx]);
1084 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
1085 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1086 ixgbe_update_rx_dca(adapter, rx_ring);
1087 #endif
1088 ixgbe_clean_rx_irq(adapter, rx_ring, &work_done, budget);
1089 enable_mask |= rx_ring->v_idx;
1090 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1091 r_idx + 1);
1092 }
1093
1094 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1095 rx_ring = &(adapter->rx_ring[r_idx]);
1096 /* If all Rx work done, exit the polling mode */
1097 if (work_done < budget) {
1098 netif_rx_complete(adapter->netdev, napi);
1099 if (adapter->itr_setting & 3)
1100 ixgbe_set_itr_msix(q_vector);
1101 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1102 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, enable_mask);
1103 return 0;
1104 }
1105
1106 return work_done;
1107 }
1108 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
1109 int r_idx)
1110 {
1111 a->q_vector[v_idx].adapter = a;
1112 set_bit(r_idx, a->q_vector[v_idx].rxr_idx);
1113 a->q_vector[v_idx].rxr_count++;
1114 a->rx_ring[r_idx].v_idx = 1 << v_idx;
1115 }
1116
1117 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
1118 int r_idx)
1119 {
1120 a->q_vector[v_idx].adapter = a;
1121 set_bit(r_idx, a->q_vector[v_idx].txr_idx);
1122 a->q_vector[v_idx].txr_count++;
1123 a->tx_ring[r_idx].v_idx = 1 << v_idx;
1124 }
1125
1126 /**
1127 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
1128 * @adapter: board private structure to initialize
1129 * @vectors: allotted vector count for descriptor rings
1130 *
1131 * This function maps descriptor rings to the queue-specific vectors
1132 * we were allotted through the MSI-X enabling code. Ideally, we'd have
1133 * one vector per ring/queue, but on a constrained vector budget, we
1134 * group the rings as "efficiently" as possible. You would add new
1135 * mapping configurations in here.
1136 **/
1137 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
1138 int vectors)
1139 {
1140 int v_start = 0;
1141 int rxr_idx = 0, txr_idx = 0;
1142 int rxr_remaining = adapter->num_rx_queues;
1143 int txr_remaining = adapter->num_tx_queues;
1144 int i, j;
1145 int rqpv, tqpv;
1146 int err = 0;
1147
1148 /* No mapping required if MSI-X is disabled. */
1149 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1150 goto out;
1151
1152 /*
1153 * The ideal configuration...
1154 * We have enough vectors to map one per queue.
1155 */
1156 if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1157 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1158 map_vector_to_rxq(adapter, v_start, rxr_idx);
1159
1160 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1161 map_vector_to_txq(adapter, v_start, txr_idx);
1162
1163 goto out;
1164 }
1165
1166 /*
1167 * If we don't have enough vectors for a 1-to-1
1168 * mapping, we'll have to group them so there are
1169 * multiple queues per vector.
1170 */
1171 /* Re-adjusting *qpv takes care of the remainder. */
1172 for (i = v_start; i < vectors; i++) {
1173 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
1174 for (j = 0; j < rqpv; j++) {
1175 map_vector_to_rxq(adapter, i, rxr_idx);
1176 rxr_idx++;
1177 rxr_remaining--;
1178 }
1179 }
1180 for (i = v_start; i < vectors; i++) {
1181 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
1182 for (j = 0; j < tqpv; j++) {
1183 map_vector_to_txq(adapter, i, txr_idx);
1184 txr_idx++;
1185 txr_remaining--;
1186 }
1187 }
1188
1189 out:
1190 return err;
1191 }
1192
1193 /**
1194 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
1195 * @adapter: board private structure
1196 *
1197 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
1198 * interrupts from the kernel.
1199 **/
1200 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
1201 {
1202 struct net_device *netdev = adapter->netdev;
1203 irqreturn_t (*handler)(int, void *);
1204 int i, vector, q_vectors, err;
1205
1206 /* Decrement for Other and TCP Timer vectors */
1207 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1208
1209 /* Map the Tx/Rx rings to the vectors we were allotted. */
1210 err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
1211 if (err)
1212 goto out;
1213
1214 #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
1215 (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
1216 &ixgbe_msix_clean_many)
1217 for (vector = 0; vector < q_vectors; vector++) {
1218 handler = SET_HANDLER(&adapter->q_vector[vector]);
1219 sprintf(adapter->name[vector], "%s:v%d-%s",
1220 netdev->name, vector,
1221 (handler == &ixgbe_msix_clean_rx) ? "Rx" :
1222 ((handler == &ixgbe_msix_clean_tx) ? "Tx" : "TxRx"));
1223 err = request_irq(adapter->msix_entries[vector].vector,
1224 handler, 0, adapter->name[vector],
1225 &(adapter->q_vector[vector]));
1226 if (err) {
1227 DPRINTK(PROBE, ERR,
1228 "request_irq failed for MSIX interrupt "
1229 "Error: %d\n", err);
1230 goto free_queue_irqs;
1231 }
1232 }
1233
1234 sprintf(adapter->name[vector], "%s:lsc", netdev->name);
1235 err = request_irq(adapter->msix_entries[vector].vector,
1236 &ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
1237 if (err) {
1238 DPRINTK(PROBE, ERR,
1239 "request_irq for msix_lsc failed: %d\n", err);
1240 goto free_queue_irqs;
1241 }
1242
1243 return 0;
1244
1245 free_queue_irqs:
1246 for (i = vector - 1; i >= 0; i--)
1247 free_irq(adapter->msix_entries[--vector].vector,
1248 &(adapter->q_vector[i]));
1249 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
1250 pci_disable_msix(adapter->pdev);
1251 kfree(adapter->msix_entries);
1252 adapter->msix_entries = NULL;
1253 out:
1254 return err;
1255 }
1256
1257 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
1258 {
1259 struct ixgbe_hw *hw = &adapter->hw;
1260 struct ixgbe_q_vector *q_vector = adapter->q_vector;
1261 u8 current_itr;
1262 u32 new_itr = q_vector->eitr;
1263 struct ixgbe_ring *rx_ring = &adapter->rx_ring[0];
1264 struct ixgbe_ring *tx_ring = &adapter->tx_ring[0];
1265
1266 q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
1267 q_vector->tx_itr,
1268 tx_ring->total_packets,
1269 tx_ring->total_bytes);
1270 q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
1271 q_vector->rx_itr,
1272 rx_ring->total_packets,
1273 rx_ring->total_bytes);
1274
1275 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1276
1277 switch (current_itr) {
1278 /* counts and packets in update_itr are dependent on these numbers */
1279 case lowest_latency:
1280 new_itr = 100000;
1281 break;
1282 case low_latency:
1283 new_itr = 20000; /* aka hwitr = ~200 */
1284 break;
1285 case bulk_latency:
1286 new_itr = 8000;
1287 break;
1288 default:
1289 break;
1290 }
1291
1292 if (new_itr != q_vector->eitr) {
1293 u32 itr_reg;
1294 /* do an exponential smoothing */
1295 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1296 q_vector->eitr = new_itr;
1297 itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr);
1298 /* must write high and low 16 bits to reset counter */
1299 IXGBE_WRITE_REG(hw, IXGBE_EITR(0), itr_reg | (itr_reg)<<16);
1300 }
1301
1302 return;
1303 }
1304
1305 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter);
1306
1307 /**
1308 * ixgbe_intr - legacy mode Interrupt Handler
1309 * @irq: interrupt number
1310 * @data: pointer to a network interface device structure
1311 * @pt_regs: CPU registers structure
1312 **/
1313 static irqreturn_t ixgbe_intr(int irq, void *data)
1314 {
1315 struct net_device *netdev = data;
1316 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1317 struct ixgbe_hw *hw = &adapter->hw;
1318 u32 eicr;
1319
1320
1321 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
1322 * therefore no explict interrupt disable is necessary */
1323 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
1324 if (!eicr) {
1325 /* shared interrupt alert!
1326 * make sure interrupts are enabled because the read will
1327 * have disabled interrupts due to EIAM */
1328 ixgbe_irq_enable(adapter);
1329 return IRQ_NONE; /* Not our interrupt */
1330 }
1331
1332 if (eicr & IXGBE_EICR_LSC)
1333 ixgbe_check_lsc(adapter);
1334
1335 if (netif_rx_schedule_prep(netdev, &adapter->q_vector[0].napi)) {
1336 adapter->tx_ring[0].total_packets = 0;
1337 adapter->tx_ring[0].total_bytes = 0;
1338 adapter->rx_ring[0].total_packets = 0;
1339 adapter->rx_ring[0].total_bytes = 0;
1340 /* would disable interrupts here but EIAM disabled it */
1341 __netif_rx_schedule(netdev, &adapter->q_vector[0].napi);
1342 }
1343
1344 return IRQ_HANDLED;
1345 }
1346
1347 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
1348 {
1349 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1350
1351 for (i = 0; i < q_vectors; i++) {
1352 struct ixgbe_q_vector *q_vector = &adapter->q_vector[i];
1353 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
1354 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
1355 q_vector->rxr_count = 0;
1356 q_vector->txr_count = 0;
1357 }
1358 }
1359
1360 /**
1361 * ixgbe_request_irq - initialize interrupts
1362 * @adapter: board private structure
1363 *
1364 * Attempts to configure interrupts using the best available
1365 * capabilities of the hardware and kernel.
1366 **/
1367 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
1368 {
1369 struct net_device *netdev = adapter->netdev;
1370 int err;
1371
1372 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1373 err = ixgbe_request_msix_irqs(adapter);
1374 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
1375 err = request_irq(adapter->pdev->irq, &ixgbe_intr, 0,
1376 netdev->name, netdev);
1377 } else {
1378 err = request_irq(adapter->pdev->irq, &ixgbe_intr, IRQF_SHARED,
1379 netdev->name, netdev);
1380 }
1381
1382 if (err)
1383 DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err);
1384
1385 return err;
1386 }
1387
1388 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
1389 {
1390 struct net_device *netdev = adapter->netdev;
1391
1392 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1393 int i, q_vectors;
1394
1395 q_vectors = adapter->num_msix_vectors;
1396
1397 i = q_vectors - 1;
1398 free_irq(adapter->msix_entries[i].vector, netdev);
1399
1400 i--;
1401 for (; i >= 0; i--) {
1402 free_irq(adapter->msix_entries[i].vector,
1403 &(adapter->q_vector[i]));
1404 }
1405
1406 ixgbe_reset_q_vectors(adapter);
1407 } else {
1408 free_irq(adapter->pdev->irq, netdev);
1409 }
1410 }
1411
1412 /**
1413 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
1414 * @adapter: board private structure
1415 **/
1416 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
1417 {
1418 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
1419 IXGBE_WRITE_FLUSH(&adapter->hw);
1420 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1421 int i;
1422 for (i = 0; i < adapter->num_msix_vectors; i++)
1423 synchronize_irq(adapter->msix_entries[i].vector);
1424 } else {
1425 synchronize_irq(adapter->pdev->irq);
1426 }
1427 }
1428
1429 /**
1430 * ixgbe_irq_enable - Enable default interrupt generation settings
1431 * @adapter: board private structure
1432 **/
1433 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
1434 {
1435 u32 mask;
1436 mask = IXGBE_EIMS_ENABLE_MASK;
1437 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1438 IXGBE_WRITE_FLUSH(&adapter->hw);
1439 }
1440
1441 /**
1442 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
1443 *
1444 **/
1445 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
1446 {
1447 struct ixgbe_hw *hw = &adapter->hw;
1448
1449 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
1450 EITR_INTS_PER_SEC_TO_REG(adapter->eitr_param));
1451
1452 ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(0), 0);
1453 ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(0), 0);
1454
1455 map_vector_to_rxq(adapter, 0, 0);
1456 map_vector_to_txq(adapter, 0, 0);
1457
1458 DPRINTK(HW, INFO, "Legacy interrupt IVAR setup done\n");
1459 }
1460
1461 /**
1462 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
1463 * @adapter: board private structure
1464 *
1465 * Configure the Tx unit of the MAC after a reset.
1466 **/
1467 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
1468 {
1469 u64 tdba, tdwba;
1470 struct ixgbe_hw *hw = &adapter->hw;
1471 u32 i, j, tdlen, txctrl;
1472
1473 /* Setup the HW Tx Head and Tail descriptor pointers */
1474 for (i = 0; i < adapter->num_tx_queues; i++) {
1475 struct ixgbe_ring *ring = &adapter->tx_ring[i];
1476 j = ring->reg_idx;
1477 tdba = ring->dma;
1478 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1479 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(j),
1480 (tdba & DMA_32BIT_MASK));
1481 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(j), (tdba >> 32));
1482 tdwba = ring->dma +
1483 (ring->count * sizeof(union ixgbe_adv_tx_desc));
1484 tdwba |= IXGBE_TDWBAL_HEAD_WB_ENABLE;
1485 IXGBE_WRITE_REG(hw, IXGBE_TDWBAL(j), tdwba & DMA_32BIT_MASK);
1486 IXGBE_WRITE_REG(hw, IXGBE_TDWBAH(j), (tdwba >> 32));
1487 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(j), tdlen);
1488 IXGBE_WRITE_REG(hw, IXGBE_TDH(j), 0);
1489 IXGBE_WRITE_REG(hw, IXGBE_TDT(j), 0);
1490 adapter->tx_ring[i].head = IXGBE_TDH(j);
1491 adapter->tx_ring[i].tail = IXGBE_TDT(j);
1492 /* Disable Tx Head Writeback RO bit, since this hoses
1493 * bookkeeping if things aren't delivered in order.
1494 */
1495 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(j));
1496 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1497 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(j), txctrl);
1498 }
1499 }
1500
1501 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1502
1503 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter, int index)
1504 {
1505 struct ixgbe_ring *rx_ring;
1506 u32 srrctl;
1507 int queue0;
1508 unsigned long mask;
1509
1510 /* program one srrctl register per VMDq index */
1511 if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED) {
1512 long shift, len;
1513 mask = (unsigned long) adapter->ring_feature[RING_F_RSS].mask;
1514 len = sizeof(adapter->ring_feature[RING_F_VMDQ].mask) * 8;
1515 shift = find_first_bit(&mask, len);
1516 queue0 = index & mask;
1517 index = (index & mask) >> shift;
1518 /* program one srrctl per RSS queue since RDRXCTL.MVMEN is enabled */
1519 } else {
1520 mask = (unsigned long) adapter->ring_feature[RING_F_RSS].mask;
1521 queue0 = index & mask;
1522 index = index & mask;
1523 }
1524
1525 rx_ring = &adapter->rx_ring[queue0];
1526
1527 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
1528
1529 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
1530 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
1531
1532 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1533 srrctl |= IXGBE_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1534 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1535 srrctl |= ((IXGBE_RX_HDR_SIZE <<
1536 IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
1537 IXGBE_SRRCTL_BSIZEHDR_MASK);
1538 } else {
1539 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1540
1541 if (rx_ring->rx_buf_len == MAXIMUM_ETHERNET_VLAN_SIZE)
1542 srrctl |= IXGBE_RXBUFFER_2048 >>
1543 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1544 else
1545 srrctl |= rx_ring->rx_buf_len >>
1546 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1547 }
1548 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
1549 }
1550
1551 /**
1552 * ixgbe_get_skb_hdr - helper function for LRO header processing
1553 * @skb: pointer to sk_buff to be added to LRO packet
1554 * @iphdr: pointer to tcp header structure
1555 * @tcph: pointer to tcp header structure
1556 * @hdr_flags: pointer to header flags
1557 * @priv: private data
1558 **/
1559 static int ixgbe_get_skb_hdr(struct sk_buff *skb, void **iphdr, void **tcph,
1560 u64 *hdr_flags, void *priv)
1561 {
1562 union ixgbe_adv_rx_desc *rx_desc = priv;
1563
1564 /* Verify that this is a valid IPv4 TCP packet */
1565 if (!((ixgbe_get_pkt_info(rx_desc) & IXGBE_RXDADV_PKTTYPE_IPV4) &&
1566 (ixgbe_get_pkt_info(rx_desc) & IXGBE_RXDADV_PKTTYPE_TCP)))
1567 return -1;
1568
1569 /* Set network headers */
1570 skb_reset_network_header(skb);
1571 skb_set_transport_header(skb, ip_hdrlen(skb));
1572 *iphdr = ip_hdr(skb);
1573 *tcph = tcp_hdr(skb);
1574 *hdr_flags = LRO_IPV4 | LRO_TCP;
1575 return 0;
1576 }
1577
1578 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1579 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1580
1581 /**
1582 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
1583 * @adapter: board private structure
1584 *
1585 * Configure the Rx unit of the MAC after a reset.
1586 **/
1587 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
1588 {
1589 u64 rdba;
1590 struct ixgbe_hw *hw = &adapter->hw;
1591 struct net_device *netdev = adapter->netdev;
1592 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1593 int i, j;
1594 u32 rdlen, rxctrl, rxcsum;
1595 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
1596 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
1597 0x6A3E67EA, 0x14364D17, 0x3BED200D};
1598 u32 fctrl, hlreg0;
1599 u32 pages;
1600 u32 reta = 0, mrqc;
1601 u32 rdrxctl;
1602 int rx_buf_len;
1603
1604 /* Decide whether to use packet split mode or not */
1605 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
1606
1607 /* Set the RX buffer length according to the mode */
1608 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1609 rx_buf_len = IXGBE_RX_HDR_SIZE;
1610 } else {
1611 if (netdev->mtu <= ETH_DATA_LEN)
1612 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1613 else
1614 rx_buf_len = ALIGN(max_frame, 1024);
1615 }
1616
1617 fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
1618 fctrl |= IXGBE_FCTRL_BAM;
1619 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
1620 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
1621
1622 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
1623 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1624 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
1625 else
1626 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
1627 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
1628
1629 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1630
1631 rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
1632 /* disable receives while setting up the descriptors */
1633 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1634 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
1635
1636 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1637 * the Base and Length of the Rx Descriptor Ring */
1638 for (i = 0; i < adapter->num_rx_queues; i++) {
1639 rdba = adapter->rx_ring[i].dma;
1640 j = adapter->rx_ring[i].reg_idx;
1641 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(j), (rdba & DMA_32BIT_MASK));
1642 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(j), (rdba >> 32));
1643 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(j), rdlen);
1644 IXGBE_WRITE_REG(hw, IXGBE_RDH(j), 0);
1645 IXGBE_WRITE_REG(hw, IXGBE_RDT(j), 0);
1646 adapter->rx_ring[i].head = IXGBE_RDH(j);
1647 adapter->rx_ring[i].tail = IXGBE_RDT(j);
1648 adapter->rx_ring[i].rx_buf_len = rx_buf_len;
1649 /* Intitial LRO Settings */
1650 adapter->rx_ring[i].lro_mgr.max_aggr = IXGBE_MAX_LRO_AGGREGATE;
1651 adapter->rx_ring[i].lro_mgr.max_desc = IXGBE_MAX_LRO_DESCRIPTORS;
1652 adapter->rx_ring[i].lro_mgr.get_skb_header = ixgbe_get_skb_hdr;
1653 adapter->rx_ring[i].lro_mgr.features = LRO_F_EXTRACT_VLAN_ID;
1654 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
1655 adapter->rx_ring[i].lro_mgr.features |= LRO_F_NAPI;
1656 adapter->rx_ring[i].lro_mgr.dev = adapter->netdev;
1657 adapter->rx_ring[i].lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1658 adapter->rx_ring[i].lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1659
1660 ixgbe_configure_srrctl(adapter, j);
1661 }
1662
1663 /*
1664 * For VMDq support of different descriptor types or
1665 * buffer sizes through the use of multiple SRRCTL
1666 * registers, RDRXCTL.MVMEN must be set to 1
1667 *
1668 * also, the manual doesn't mention it clearly but DCA hints
1669 * will only use queue 0's tags unless this bit is set. Side
1670 * effects of setting this bit are only that SRRCTL must be
1671 * fully programmed [0..15]
1672 */
1673 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
1674 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
1675 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
1676
1677
1678 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
1679 /* Fill out redirection table */
1680 for (i = 0, j = 0; i < 128; i++, j++) {
1681 if (j == adapter->ring_feature[RING_F_RSS].indices)
1682 j = 0;
1683 /* reta = 4-byte sliding window of
1684 * 0x00..(indices-1)(indices-1)00..etc. */
1685 reta = (reta << 8) | (j * 0x11);
1686 if ((i & 3) == 3)
1687 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
1688 }
1689
1690 /* Fill out hash function seeds */
1691 for (i = 0; i < 10; i++)
1692 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
1693
1694 mrqc = IXGBE_MRQC_RSSEN
1695 /* Perform hash on these packet types */
1696 | IXGBE_MRQC_RSS_FIELD_IPV4
1697 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
1698 | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
1699 | IXGBE_MRQC_RSS_FIELD_IPV6_EX_TCP
1700 | IXGBE_MRQC_RSS_FIELD_IPV6_EX
1701 | IXGBE_MRQC_RSS_FIELD_IPV6
1702 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
1703 | IXGBE_MRQC_RSS_FIELD_IPV6_UDP
1704 | IXGBE_MRQC_RSS_FIELD_IPV6_EX_UDP;
1705 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
1706 }
1707
1708 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
1709
1710 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED ||
1711 adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
1712 /* Disable indicating checksum in descriptor, enables
1713 * RSS hash */
1714 rxcsum |= IXGBE_RXCSUM_PCSD;
1715 }
1716 if (!(rxcsum & IXGBE_RXCSUM_PCSD)) {
1717 /* Enable IPv4 payload checksum for UDP fragments
1718 * if PCSD is not set */
1719 rxcsum |= IXGBE_RXCSUM_IPPCSE;
1720 }
1721
1722 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
1723 }
1724
1725 static void ixgbe_vlan_rx_register(struct net_device *netdev,
1726 struct vlan_group *grp)
1727 {
1728 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1729 u32 ctrl;
1730
1731 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1732 ixgbe_irq_disable(adapter);
1733 adapter->vlgrp = grp;
1734
1735 if (grp) {
1736 /* enable VLAN tag insert/strip */
1737 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
1738 ctrl |= IXGBE_VLNCTRL_VME;
1739 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
1740 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
1741 }
1742
1743 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1744 ixgbe_irq_enable(adapter);
1745 }
1746
1747 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1748 {
1749 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1750 struct ixgbe_hw *hw = &adapter->hw;
1751
1752 /* add VID to filter table */
1753 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, true);
1754 }
1755
1756 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1757 {
1758 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1759 struct ixgbe_hw *hw = &adapter->hw;
1760
1761 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1762 ixgbe_irq_disable(adapter);
1763
1764 vlan_group_set_device(adapter->vlgrp, vid, NULL);
1765
1766 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1767 ixgbe_irq_enable(adapter);
1768
1769 /* remove VID from filter table */
1770 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, false);
1771 }
1772
1773 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
1774 {
1775 ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
1776
1777 if (adapter->vlgrp) {
1778 u16 vid;
1779 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
1780 if (!vlan_group_get_device(adapter->vlgrp, vid))
1781 continue;
1782 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
1783 }
1784 }
1785 }
1786
1787 static u8 *ixgbe_addr_list_itr(struct ixgbe_hw *hw, u8 **mc_addr_ptr, u32 *vmdq)
1788 {
1789 struct dev_mc_list *mc_ptr;
1790 u8 *addr = *mc_addr_ptr;
1791 *vmdq = 0;
1792
1793 mc_ptr = container_of(addr, struct dev_mc_list, dmi_addr[0]);
1794 if (mc_ptr->next)
1795 *mc_addr_ptr = mc_ptr->next->dmi_addr;
1796 else
1797 *mc_addr_ptr = NULL;
1798
1799 return addr;
1800 }
1801
1802 /**
1803 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
1804 * @netdev: network interface device structure
1805 *
1806 * The set_rx_method entry point is called whenever the unicast/multicast
1807 * address list or the network interface flags are updated. This routine is
1808 * responsible for configuring the hardware for proper unicast, multicast and
1809 * promiscuous mode.
1810 **/
1811 static void ixgbe_set_rx_mode(struct net_device *netdev)
1812 {
1813 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1814 struct ixgbe_hw *hw = &adapter->hw;
1815 u32 fctrl, vlnctrl;
1816 u8 *addr_list = NULL;
1817 int addr_count = 0;
1818
1819 /* Check for Promiscuous and All Multicast modes */
1820
1821 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
1822 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
1823
1824 if (netdev->flags & IFF_PROMISC) {
1825 hw->addr_ctrl.user_set_promisc = 1;
1826 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
1827 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
1828 } else {
1829 if (netdev->flags & IFF_ALLMULTI) {
1830 fctrl |= IXGBE_FCTRL_MPE;
1831 fctrl &= ~IXGBE_FCTRL_UPE;
1832 } else {
1833 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
1834 }
1835 vlnctrl |= IXGBE_VLNCTRL_VFE;
1836 hw->addr_ctrl.user_set_promisc = 0;
1837 }
1838
1839 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
1840 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
1841
1842 /* reprogram secondary unicast list */
1843 addr_count = netdev->uc_count;
1844 if (addr_count)
1845 addr_list = netdev->uc_list->dmi_addr;
1846 hw->mac.ops.update_uc_addr_list(hw, addr_list, addr_count,
1847 ixgbe_addr_list_itr);
1848
1849 /* reprogram multicast list */
1850 addr_count = netdev->mc_count;
1851 if (addr_count)
1852 addr_list = netdev->mc_list->dmi_addr;
1853 hw->mac.ops.update_mc_addr_list(hw, addr_list, addr_count,
1854 ixgbe_addr_list_itr);
1855 }
1856
1857 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
1858 {
1859 int q_idx;
1860 struct ixgbe_q_vector *q_vector;
1861 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1862
1863 /* legacy and MSI only use one vector */
1864 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1865 q_vectors = 1;
1866
1867 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1868 struct napi_struct *napi;
1869 q_vector = &adapter->q_vector[q_idx];
1870 if (!q_vector->rxr_count)
1871 continue;
1872 napi = &q_vector->napi;
1873 if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) &&
1874 (q_vector->rxr_count > 1))
1875 napi->poll = &ixgbe_clean_rxonly_many;
1876
1877 napi_enable(napi);
1878 }
1879 }
1880
1881 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
1882 {
1883 int q_idx;
1884 struct ixgbe_q_vector *q_vector;
1885 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1886
1887 /* legacy and MSI only use one vector */
1888 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1889 q_vectors = 1;
1890
1891 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1892 q_vector = &adapter->q_vector[q_idx];
1893 if (!q_vector->rxr_count)
1894 continue;
1895 napi_disable(&q_vector->napi);
1896 }
1897 }
1898
1899 static void ixgbe_configure(struct ixgbe_adapter *adapter)
1900 {
1901 struct net_device *netdev = adapter->netdev;
1902 int i;
1903
1904 ixgbe_set_rx_mode(netdev);
1905
1906 ixgbe_restore_vlan(adapter);
1907
1908 ixgbe_configure_tx(adapter);
1909 ixgbe_configure_rx(adapter);
1910 for (i = 0; i < adapter->num_rx_queues; i++)
1911 ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i],
1912 (adapter->rx_ring[i].count - 1));
1913 }
1914
1915 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
1916 {
1917 struct net_device *netdev = adapter->netdev;
1918 struct ixgbe_hw *hw = &adapter->hw;
1919 int i, j = 0;
1920 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1921 u32 txdctl, rxdctl, mhadd;
1922 u32 gpie;
1923
1924 ixgbe_get_hw_control(adapter);
1925
1926 if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) ||
1927 (adapter->flags & IXGBE_FLAG_MSI_ENABLED)) {
1928 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1929 gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
1930 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
1931 } else {
1932 /* MSI only */
1933 gpie = 0;
1934 }
1935 /* XXX: to interrupt immediately for EICS writes, enable this */
1936 /* gpie |= IXGBE_GPIE_EIMEN; */
1937 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
1938 }
1939
1940 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
1941 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
1942 * specifically only auto mask tx and rx interrupts */
1943 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
1944 }
1945
1946 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
1947 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
1948 mhadd &= ~IXGBE_MHADD_MFS_MASK;
1949 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
1950
1951 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
1952 }
1953
1954 for (i = 0; i < adapter->num_tx_queues; i++) {
1955 j = adapter->tx_ring[i].reg_idx;
1956 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
1957 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
1958 txdctl |= (8 << 16);
1959 txdctl |= IXGBE_TXDCTL_ENABLE;
1960 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
1961 }
1962
1963 for (i = 0; i < adapter->num_rx_queues; i++) {
1964 j = adapter->rx_ring[i].reg_idx;
1965 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
1966 /* enable PTHRESH=32 descriptors (half the internal cache)
1967 * and HTHRESH=0 descriptors (to minimize latency on fetch),
1968 * this also removes a pesky rx_no_buffer_count increment */
1969 rxdctl |= 0x0020;
1970 rxdctl |= IXGBE_RXDCTL_ENABLE;
1971 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), rxdctl);
1972 }
1973 /* enable all receives */
1974 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1975 rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
1976 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxdctl);
1977
1978 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
1979 ixgbe_configure_msix(adapter);
1980 else
1981 ixgbe_configure_msi_and_legacy(adapter);
1982
1983 clear_bit(__IXGBE_DOWN, &adapter->state);
1984 ixgbe_napi_enable_all(adapter);
1985
1986 /* clear any pending interrupts, may auto mask */
1987 IXGBE_READ_REG(hw, IXGBE_EICR);
1988
1989 ixgbe_irq_enable(adapter);
1990
1991 /* bring the link up in the watchdog, this could race with our first
1992 * link up interrupt but shouldn't be a problem */
1993 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1994 adapter->link_check_timeout = jiffies;
1995 mod_timer(&adapter->watchdog_timer, jiffies);
1996 return 0;
1997 }
1998
1999 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
2000 {
2001 WARN_ON(in_interrupt());
2002 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
2003 msleep(1);
2004 ixgbe_down(adapter);
2005 ixgbe_up(adapter);
2006 clear_bit(__IXGBE_RESETTING, &adapter->state);
2007 }
2008
2009 int ixgbe_up(struct ixgbe_adapter *adapter)
2010 {
2011 /* hardware has been reset, we need to reload some things */
2012 ixgbe_configure(adapter);
2013
2014 return ixgbe_up_complete(adapter);
2015 }
2016
2017 void ixgbe_reset(struct ixgbe_adapter *adapter)
2018 {
2019 struct ixgbe_hw *hw = &adapter->hw;
2020 if (hw->mac.ops.init_hw(hw))
2021 dev_err(&adapter->pdev->dev, "Hardware Error\n");
2022
2023 /* reprogram the RAR[0] in case user changed it. */
2024 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
2025
2026 }
2027
2028 #ifdef CONFIG_PM
2029 static int ixgbe_resume(struct pci_dev *pdev)
2030 {
2031 struct net_device *netdev = pci_get_drvdata(pdev);
2032 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2033 u32 err;
2034
2035 pci_set_power_state(pdev, PCI_D0);
2036 pci_restore_state(pdev);
2037 err = pci_enable_device(pdev);
2038 if (err) {
2039 printk(KERN_ERR "ixgbe: Cannot enable PCI device from " \
2040 "suspend\n");
2041 return err;
2042 }
2043 pci_set_master(pdev);
2044
2045 pci_enable_wake(pdev, PCI_D3hot, 0);
2046 pci_enable_wake(pdev, PCI_D3cold, 0);
2047
2048 if (netif_running(netdev)) {
2049 err = ixgbe_request_irq(adapter);
2050 if (err)
2051 return err;
2052 }
2053
2054 ixgbe_reset(adapter);
2055
2056 if (netif_running(netdev))
2057 ixgbe_up(adapter);
2058
2059 netif_device_attach(netdev);
2060
2061 return 0;
2062 }
2063 #endif
2064
2065 /**
2066 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
2067 * @adapter: board private structure
2068 * @rx_ring: ring to free buffers from
2069 **/
2070 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
2071 struct ixgbe_ring *rx_ring)
2072 {
2073 struct pci_dev *pdev = adapter->pdev;
2074 unsigned long size;
2075 unsigned int i;
2076
2077 /* Free all the Rx ring sk_buffs */
2078
2079 for (i = 0; i < rx_ring->count; i++) {
2080 struct ixgbe_rx_buffer *rx_buffer_info;
2081
2082 rx_buffer_info = &rx_ring->rx_buffer_info[i];
2083 if (rx_buffer_info->dma) {
2084 pci_unmap_single(pdev, rx_buffer_info->dma,
2085 rx_ring->rx_buf_len,
2086 PCI_DMA_FROMDEVICE);
2087 rx_buffer_info->dma = 0;
2088 }
2089 if (rx_buffer_info->skb) {
2090 dev_kfree_skb(rx_buffer_info->skb);
2091 rx_buffer_info->skb = NULL;
2092 }
2093 if (!rx_buffer_info->page)
2094 continue;
2095 pci_unmap_page(pdev, rx_buffer_info->page_dma, PAGE_SIZE / 2,
2096 PCI_DMA_FROMDEVICE);
2097 rx_buffer_info->page_dma = 0;
2098 put_page(rx_buffer_info->page);
2099 rx_buffer_info->page = NULL;
2100 rx_buffer_info->page_offset = 0;
2101 }
2102
2103 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
2104 memset(rx_ring->rx_buffer_info, 0, size);
2105
2106 /* Zero out the descriptor ring */
2107 memset(rx_ring->desc, 0, rx_ring->size);
2108
2109 rx_ring->next_to_clean = 0;
2110 rx_ring->next_to_use = 0;
2111
2112 writel(0, adapter->hw.hw_addr + rx_ring->head);
2113 writel(0, adapter->hw.hw_addr + rx_ring->tail);
2114 }
2115
2116 /**
2117 * ixgbe_clean_tx_ring - Free Tx Buffers
2118 * @adapter: board private structure
2119 * @tx_ring: ring to be cleaned
2120 **/
2121 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
2122 struct ixgbe_ring *tx_ring)
2123 {
2124 struct ixgbe_tx_buffer *tx_buffer_info;
2125 unsigned long size;
2126 unsigned int i;
2127
2128 /* Free all the Tx ring sk_buffs */
2129
2130 for (i = 0; i < tx_ring->count; i++) {
2131 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2132 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
2133 }
2134
2135 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
2136 memset(tx_ring->tx_buffer_info, 0, size);
2137
2138 /* Zero out the descriptor ring */
2139 memset(tx_ring->desc, 0, tx_ring->size);
2140
2141 tx_ring->next_to_use = 0;
2142 tx_ring->next_to_clean = 0;
2143
2144 writel(0, adapter->hw.hw_addr + tx_ring->head);
2145 writel(0, adapter->hw.hw_addr + tx_ring->tail);
2146 }
2147
2148 /**
2149 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
2150 * @adapter: board private structure
2151 **/
2152 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
2153 {
2154 int i;
2155
2156 for (i = 0; i < adapter->num_rx_queues; i++)
2157 ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2158 }
2159
2160 /**
2161 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
2162 * @adapter: board private structure
2163 **/
2164 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
2165 {
2166 int i;
2167
2168 for (i = 0; i < adapter->num_tx_queues; i++)
2169 ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2170 }
2171
2172 void ixgbe_down(struct ixgbe_adapter *adapter)
2173 {
2174 struct net_device *netdev = adapter->netdev;
2175 struct ixgbe_hw *hw = &adapter->hw;
2176 u32 rxctrl;
2177 u32 txdctl;
2178 int i, j;
2179
2180 /* signal that we are down to the interrupt handler */
2181 set_bit(__IXGBE_DOWN, &adapter->state);
2182
2183 /* disable receives */
2184 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2185 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2186
2187 netif_tx_disable(netdev);
2188
2189 IXGBE_WRITE_FLUSH(hw);
2190 msleep(10);
2191
2192 netif_tx_stop_all_queues(netdev);
2193
2194 ixgbe_irq_disable(adapter);
2195
2196 ixgbe_napi_disable_all(adapter);
2197
2198 del_timer_sync(&adapter->watchdog_timer);
2199 cancel_work_sync(&adapter->watchdog_task);
2200
2201 /* disable transmits in the hardware now that interrupts are off */
2202 for (i = 0; i < adapter->num_tx_queues; i++) {
2203 j = adapter->tx_ring[i].reg_idx;
2204 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2205 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
2206 (txdctl & ~IXGBE_TXDCTL_ENABLE));
2207 }
2208
2209 netif_carrier_off(netdev);
2210
2211 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
2212 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
2213 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
2214 dca_remove_requester(&adapter->pdev->dev);
2215 }
2216
2217 #endif
2218 if (!pci_channel_offline(adapter->pdev))
2219 ixgbe_reset(adapter);
2220 ixgbe_clean_all_tx_rings(adapter);
2221 ixgbe_clean_all_rx_rings(adapter);
2222
2223 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
2224 /* since we reset the hardware DCA settings were cleared */
2225 if (dca_add_requester(&adapter->pdev->dev) == 0) {
2226 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
2227 /* always use CB2 mode, difference is masked
2228 * in the CB driver */
2229 IXGBE_WRITE_REG(hw, IXGBE_DCA_CTRL, 2);
2230 ixgbe_setup_dca(adapter);
2231 }
2232 #endif
2233 }
2234
2235 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
2236 {
2237 struct net_device *netdev = pci_get_drvdata(pdev);
2238 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2239 #ifdef CONFIG_PM
2240 int retval = 0;
2241 #endif
2242
2243 netif_device_detach(netdev);
2244
2245 if (netif_running(netdev)) {
2246 ixgbe_down(adapter);
2247 ixgbe_free_irq(adapter);
2248 }
2249
2250 #ifdef CONFIG_PM
2251 retval = pci_save_state(pdev);
2252 if (retval)
2253 return retval;
2254 #endif
2255
2256 pci_enable_wake(pdev, PCI_D3hot, 0);
2257 pci_enable_wake(pdev, PCI_D3cold, 0);
2258
2259 ixgbe_release_hw_control(adapter);
2260
2261 pci_disable_device(pdev);
2262
2263 pci_set_power_state(pdev, pci_choose_state(pdev, state));
2264
2265 return 0;
2266 }
2267
2268 static void ixgbe_shutdown(struct pci_dev *pdev)
2269 {
2270 ixgbe_suspend(pdev, PMSG_SUSPEND);
2271 }
2272
2273 /**
2274 * ixgbe_poll - NAPI Rx polling callback
2275 * @napi: structure for representing this polling device
2276 * @budget: how many packets driver is allowed to clean
2277 *
2278 * This function is used for legacy and MSI, NAPI mode
2279 **/
2280 static int ixgbe_poll(struct napi_struct *napi, int budget)
2281 {
2282 struct ixgbe_q_vector *q_vector = container_of(napi,
2283 struct ixgbe_q_vector, napi);
2284 struct ixgbe_adapter *adapter = q_vector->adapter;
2285 int tx_cleaned, work_done = 0;
2286
2287 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
2288 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
2289 ixgbe_update_tx_dca(adapter, adapter->tx_ring);
2290 ixgbe_update_rx_dca(adapter, adapter->rx_ring);
2291 }
2292 #endif
2293
2294 tx_cleaned = ixgbe_clean_tx_irq(adapter, adapter->tx_ring);
2295 ixgbe_clean_rx_irq(adapter, adapter->rx_ring, &work_done, budget);
2296
2297 if (tx_cleaned)
2298 work_done = budget;
2299
2300 /* If budget not fully consumed, exit the polling mode */
2301 if (work_done < budget) {
2302 netif_rx_complete(adapter->netdev, napi);
2303 if (adapter->itr_setting & 3)
2304 ixgbe_set_itr(adapter);
2305 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2306 ixgbe_irq_enable(adapter);
2307 }
2308 return work_done;
2309 }
2310
2311 /**
2312 * ixgbe_tx_timeout - Respond to a Tx Hang
2313 * @netdev: network interface device structure
2314 **/
2315 static void ixgbe_tx_timeout(struct net_device *netdev)
2316 {
2317 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2318
2319 /* Do the reset outside of interrupt context */
2320 schedule_work(&adapter->reset_task);
2321 }
2322
2323 static void ixgbe_reset_task(struct work_struct *work)
2324 {
2325 struct ixgbe_adapter *adapter;
2326 adapter = container_of(work, struct ixgbe_adapter, reset_task);
2327
2328 adapter->tx_timeout_count++;
2329
2330 ixgbe_reinit_locked(adapter);
2331 }
2332
2333 static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
2334 {
2335 int nrq = 1, ntq = 1;
2336 int feature_mask = 0, rss_i, rss_m;
2337
2338 /* Number of supported queues */
2339 switch (adapter->hw.mac.type) {
2340 case ixgbe_mac_82598EB:
2341 rss_i = adapter->ring_feature[RING_F_RSS].indices;
2342 rss_m = 0;
2343 feature_mask |= IXGBE_FLAG_RSS_ENABLED;
2344
2345 switch (adapter->flags & feature_mask) {
2346 case (IXGBE_FLAG_RSS_ENABLED):
2347 rss_m = 0xF;
2348 nrq = rss_i;
2349 ntq = rss_i;
2350 break;
2351 case 0:
2352 default:
2353 rss_i = 0;
2354 rss_m = 0;
2355 nrq = 1;
2356 ntq = 1;
2357 break;
2358 }
2359
2360 adapter->ring_feature[RING_F_RSS].indices = rss_i;
2361 adapter->ring_feature[RING_F_RSS].mask = rss_m;
2362 break;
2363 default:
2364 nrq = 1;
2365 ntq = 1;
2366 break;
2367 }
2368
2369 adapter->num_rx_queues = nrq;
2370 adapter->num_tx_queues = ntq;
2371 }
2372
2373 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
2374 int vectors)
2375 {
2376 int err, vector_threshold;
2377
2378 /* We'll want at least 3 (vector_threshold):
2379 * 1) TxQ[0] Cleanup
2380 * 2) RxQ[0] Cleanup
2381 * 3) Other (Link Status Change, etc.)
2382 * 4) TCP Timer (optional)
2383 */
2384 vector_threshold = MIN_MSIX_COUNT;
2385
2386 /* The more we get, the more we will assign to Tx/Rx Cleanup
2387 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
2388 * Right now, we simply care about how many we'll get; we'll
2389 * set them up later while requesting irq's.
2390 */
2391 while (vectors >= vector_threshold) {
2392 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
2393 vectors);
2394 if (!err) /* Success in acquiring all requested vectors. */
2395 break;
2396 else if (err < 0)
2397 vectors = 0; /* Nasty failure, quit now */
2398 else /* err == number of vectors we should try again with */
2399 vectors = err;
2400 }
2401
2402 if (vectors < vector_threshold) {
2403 /* Can't allocate enough MSI-X interrupts? Oh well.
2404 * This just means we'll go with either a single MSI
2405 * vector or fall back to legacy interrupts.
2406 */
2407 DPRINTK(HW, DEBUG, "Unable to allocate MSI-X interrupts\n");
2408 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2409 kfree(adapter->msix_entries);
2410 adapter->msix_entries = NULL;
2411 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
2412 ixgbe_set_num_queues(adapter);
2413 } else {
2414 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
2415 adapter->num_msix_vectors = vectors;
2416 }
2417 }
2418
2419 /**
2420 * ixgbe_cache_ring_register - Descriptor ring to register mapping
2421 * @adapter: board private structure to initialize
2422 *
2423 * Once we know the feature-set enabled for the device, we'll cache
2424 * the register offset the descriptor ring is assigned to.
2425 **/
2426 static void __devinit ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
2427 {
2428 /* TODO: Remove all uses of the indices in the cases where multiple
2429 * features are OR'd together, if the feature set makes sense.
2430 */
2431 int feature_mask = 0, rss_i;
2432 int i, txr_idx, rxr_idx;
2433
2434 /* Number of supported queues */
2435 switch (adapter->hw.mac.type) {
2436 case ixgbe_mac_82598EB:
2437 rss_i = adapter->ring_feature[RING_F_RSS].indices;
2438 txr_idx = 0;
2439 rxr_idx = 0;
2440 feature_mask |= IXGBE_FLAG_RSS_ENABLED;
2441 switch (adapter->flags & feature_mask) {
2442 case (IXGBE_FLAG_RSS_ENABLED):
2443 for (i = 0; i < adapter->num_rx_queues; i++)
2444 adapter->rx_ring[i].reg_idx = i;
2445 for (i = 0; i < adapter->num_tx_queues; i++)
2446 adapter->tx_ring[i].reg_idx = i;
2447 break;
2448 case 0:
2449 default:
2450 break;
2451 }
2452 break;
2453 default:
2454 break;
2455 }
2456 }
2457
2458 /**
2459 * ixgbe_alloc_queues - Allocate memory for all rings
2460 * @adapter: board private structure to initialize
2461 *
2462 * We allocate one ring per queue at run-time since we don't know the
2463 * number of queues at compile-time. The polling_netdev array is
2464 * intended for Multiqueue, but should work fine with a single queue.
2465 **/
2466 static int __devinit ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
2467 {
2468 int i;
2469
2470 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
2471 sizeof(struct ixgbe_ring), GFP_KERNEL);
2472 if (!adapter->tx_ring)
2473 goto err_tx_ring_allocation;
2474
2475 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
2476 sizeof(struct ixgbe_ring), GFP_KERNEL);
2477 if (!adapter->rx_ring)
2478 goto err_rx_ring_allocation;
2479
2480 for (i = 0; i < adapter->num_tx_queues; i++) {
2481 adapter->tx_ring[i].count = adapter->tx_ring_count;
2482 adapter->tx_ring[i].queue_index = i;
2483 }
2484
2485 for (i = 0; i < adapter->num_rx_queues; i++) {
2486 adapter->rx_ring[i].count = adapter->rx_ring_count;
2487 adapter->rx_ring[i].queue_index = i;
2488 }
2489
2490 ixgbe_cache_ring_register(adapter);
2491
2492 return 0;
2493
2494 err_rx_ring_allocation:
2495 kfree(adapter->tx_ring);
2496 err_tx_ring_allocation:
2497 return -ENOMEM;
2498 }
2499
2500 /**
2501 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
2502 * @adapter: board private structure to initialize
2503 *
2504 * Attempt to configure the interrupts using the best available
2505 * capabilities of the hardware and the kernel.
2506 **/
2507 static int __devinit ixgbe_set_interrupt_capability(struct ixgbe_adapter
2508 *adapter)
2509 {
2510 int err = 0;
2511 int vector, v_budget;
2512
2513 /*
2514 * It's easy to be greedy for MSI-X vectors, but it really
2515 * doesn't do us much good if we have a lot more vectors
2516 * than CPU's. So let's be conservative and only ask for
2517 * (roughly) twice the number of vectors as there are CPU's.
2518 */
2519 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
2520 (int)(num_online_cpus() * 2)) + NON_Q_VECTORS;
2521
2522 /*
2523 * At the same time, hardware can only support a maximum of
2524 * MAX_MSIX_COUNT vectors. With features such as RSS and VMDq,
2525 * we can easily reach upwards of 64 Rx descriptor queues and
2526 * 32 Tx queues. Thus, we cap it off in those rare cases where
2527 * the cpu count also exceeds our vector limit.
2528 */
2529 v_budget = min(v_budget, MAX_MSIX_COUNT);
2530
2531 /* A failure in MSI-X entry allocation isn't fatal, but it does
2532 * mean we disable MSI-X capabilities of the adapter. */
2533 adapter->msix_entries = kcalloc(v_budget,
2534 sizeof(struct msix_entry), GFP_KERNEL);
2535 if (!adapter->msix_entries) {
2536 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
2537 ixgbe_set_num_queues(adapter);
2538 kfree(adapter->tx_ring);
2539 kfree(adapter->rx_ring);
2540 err = ixgbe_alloc_queues(adapter);
2541 if (err) {
2542 DPRINTK(PROBE, ERR, "Unable to allocate memory "
2543 "for queues\n");
2544 goto out;
2545 }
2546
2547 goto try_msi;
2548 }
2549
2550 for (vector = 0; vector < v_budget; vector++)
2551 adapter->msix_entries[vector].entry = vector;
2552
2553 ixgbe_acquire_msix_vectors(adapter, v_budget);
2554
2555 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2556 goto out;
2557
2558 try_msi:
2559 err = pci_enable_msi(adapter->pdev);
2560 if (!err) {
2561 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
2562 } else {
2563 DPRINTK(HW, DEBUG, "Unable to allocate MSI interrupt, "
2564 "falling back to legacy. Error: %d\n", err);
2565 /* reset err */
2566 err = 0;
2567 }
2568
2569 out:
2570 /* Notify the stack of the (possibly) reduced Tx Queue count. */
2571 adapter->netdev->real_num_tx_queues = adapter->num_tx_queues;
2572
2573 return err;
2574 }
2575
2576 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
2577 {
2578 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2579 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2580 pci_disable_msix(adapter->pdev);
2581 kfree(adapter->msix_entries);
2582 adapter->msix_entries = NULL;
2583 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
2584 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
2585 pci_disable_msi(adapter->pdev);
2586 }
2587 return;
2588 }
2589
2590 /**
2591 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
2592 * @adapter: board private structure to initialize
2593 *
2594 * We determine which interrupt scheme to use based on...
2595 * - Kernel support (MSI, MSI-X)
2596 * - which can be user-defined (via MODULE_PARAM)
2597 * - Hardware queue count (num_*_queues)
2598 * - defined by miscellaneous hardware support/features (RSS, etc.)
2599 **/
2600 static int __devinit ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
2601 {
2602 int err;
2603
2604 /* Number of supported queues */
2605 ixgbe_set_num_queues(adapter);
2606
2607 err = ixgbe_alloc_queues(adapter);
2608 if (err) {
2609 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
2610 goto err_alloc_queues;
2611 }
2612
2613 err = ixgbe_set_interrupt_capability(adapter);
2614 if (err) {
2615 DPRINTK(PROBE, ERR, "Unable to setup interrupt capabilities\n");
2616 goto err_set_interrupt;
2617 }
2618
2619 DPRINTK(DRV, INFO, "Multiqueue %s: Rx Queue count = %u, "
2620 "Tx Queue count = %u\n",
2621 (adapter->num_rx_queues > 1) ? "Enabled" :
2622 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
2623
2624 set_bit(__IXGBE_DOWN, &adapter->state);
2625
2626 return 0;
2627
2628 err_set_interrupt:
2629 kfree(adapter->tx_ring);
2630 kfree(adapter->rx_ring);
2631 err_alloc_queues:
2632 return err;
2633 }
2634
2635 /**
2636 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
2637 * @adapter: board private structure to initialize
2638 *
2639 * ixgbe_sw_init initializes the Adapter private data structure.
2640 * Fields are initialized based on PCI device information and
2641 * OS network device settings (MTU size).
2642 **/
2643 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
2644 {
2645 struct ixgbe_hw *hw = &adapter->hw;
2646 struct pci_dev *pdev = adapter->pdev;
2647 unsigned int rss;
2648
2649 /* PCI config space info */
2650
2651 hw->vendor_id = pdev->vendor;
2652 hw->device_id = pdev->device;
2653 hw->revision_id = pdev->revision;
2654 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2655 hw->subsystem_device_id = pdev->subsystem_device;
2656
2657 /* Set capability flags */
2658 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
2659 adapter->ring_feature[RING_F_RSS].indices = rss;
2660 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
2661
2662 /* default flow control settings */
2663 hw->fc.original_type = ixgbe_fc_none;
2664 hw->fc.type = ixgbe_fc_none;
2665 hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
2666 hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
2667 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
2668 hw->fc.send_xon = true;
2669
2670 /* select 10G link by default */
2671 hw->mac.link_mode_select = IXGBE_AUTOC_LMS_10G_LINK_NO_AN;
2672
2673 /* enable itr by default in dynamic mode */
2674 adapter->itr_setting = 1;
2675 adapter->eitr_param = 20000;
2676
2677 /* set defaults for eitr in MegaBytes */
2678 adapter->eitr_low = 10;
2679 adapter->eitr_high = 20;
2680
2681 /* set default ring sizes */
2682 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
2683 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
2684
2685 /* initialize eeprom parameters */
2686 if (ixgbe_init_eeprom_params_generic(hw)) {
2687 dev_err(&pdev->dev, "EEPROM initialization failed\n");
2688 return -EIO;
2689 }
2690
2691 /* enable rx csum by default */
2692 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
2693
2694 set_bit(__IXGBE_DOWN, &adapter->state);
2695
2696 return 0;
2697 }
2698
2699 /**
2700 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
2701 * @adapter: board private structure
2702 * @tx_ring: tx descriptor ring (for a specific queue) to setup
2703 *
2704 * Return 0 on success, negative on failure
2705 **/
2706 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
2707 struct ixgbe_ring *tx_ring)
2708 {
2709 struct pci_dev *pdev = adapter->pdev;
2710 int size;
2711
2712 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
2713 tx_ring->tx_buffer_info = vmalloc(size);
2714 if (!tx_ring->tx_buffer_info)
2715 goto err;
2716 memset(tx_ring->tx_buffer_info, 0, size);
2717
2718 /* round up to nearest 4K */
2719 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc) +
2720 sizeof(u32);
2721 tx_ring->size = ALIGN(tx_ring->size, 4096);
2722
2723 tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
2724 &tx_ring->dma);
2725 if (!tx_ring->desc)
2726 goto err;
2727
2728 tx_ring->next_to_use = 0;
2729 tx_ring->next_to_clean = 0;
2730 tx_ring->work_limit = tx_ring->count;
2731 return 0;
2732
2733 err:
2734 vfree(tx_ring->tx_buffer_info);
2735 tx_ring->tx_buffer_info = NULL;
2736 DPRINTK(PROBE, ERR, "Unable to allocate memory for the transmit "
2737 "descriptor ring\n");
2738 return -ENOMEM;
2739 }
2740
2741 /**
2742 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
2743 * @adapter: board private structure
2744 * @rx_ring: rx descriptor ring (for a specific queue) to setup
2745 *
2746 * Returns 0 on success, negative on failure
2747 **/
2748 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
2749 struct ixgbe_ring *rx_ring)
2750 {
2751 struct pci_dev *pdev = adapter->pdev;
2752 int size;
2753
2754 size = sizeof(struct net_lro_desc) * IXGBE_MAX_LRO_DESCRIPTORS;
2755 rx_ring->lro_mgr.lro_arr = vmalloc(size);
2756 if (!rx_ring->lro_mgr.lro_arr)
2757 return -ENOMEM;
2758 memset(rx_ring->lro_mgr.lro_arr, 0, size);
2759
2760 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
2761 rx_ring->rx_buffer_info = vmalloc(size);
2762 if (!rx_ring->rx_buffer_info) {
2763 DPRINTK(PROBE, ERR,
2764 "vmalloc allocation failed for the rx desc ring\n");
2765 goto alloc_failed;
2766 }
2767 memset(rx_ring->rx_buffer_info, 0, size);
2768
2769 /* Round up to nearest 4K */
2770 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
2771 rx_ring->size = ALIGN(rx_ring->size, 4096);
2772
2773 rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size, &rx_ring->dma);
2774
2775 if (!rx_ring->desc) {
2776 DPRINTK(PROBE, ERR,
2777 "Memory allocation failed for the rx desc ring\n");
2778 vfree(rx_ring->rx_buffer_info);
2779 goto alloc_failed;
2780 }
2781
2782 rx_ring->next_to_clean = 0;
2783 rx_ring->next_to_use = 0;
2784
2785 return 0;
2786
2787 alloc_failed:
2788 vfree(rx_ring->lro_mgr.lro_arr);
2789 rx_ring->lro_mgr.lro_arr = NULL;
2790 return -ENOMEM;
2791 }
2792
2793 /**
2794 * ixgbe_free_tx_resources - Free Tx Resources per Queue
2795 * @adapter: board private structure
2796 * @tx_ring: Tx descriptor ring for a specific queue
2797 *
2798 * Free all transmit software resources
2799 **/
2800 void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
2801 struct ixgbe_ring *tx_ring)
2802 {
2803 struct pci_dev *pdev = adapter->pdev;
2804
2805 ixgbe_clean_tx_ring(adapter, tx_ring);
2806
2807 vfree(tx_ring->tx_buffer_info);
2808 tx_ring->tx_buffer_info = NULL;
2809
2810 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2811
2812 tx_ring->desc = NULL;
2813 }
2814
2815 /**
2816 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
2817 * @adapter: board private structure
2818 *
2819 * Free all transmit software resources
2820 **/
2821 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
2822 {
2823 int i;
2824
2825 for (i = 0; i < adapter->num_tx_queues; i++)
2826 ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
2827 }
2828
2829 /**
2830 * ixgbe_ree_rx_resources - Free Rx Resources
2831 * @adapter: board private structure
2832 * @rx_ring: ring to clean the resources from
2833 *
2834 * Free all receive software resources
2835 **/
2836 void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
2837 struct ixgbe_ring *rx_ring)
2838 {
2839 struct pci_dev *pdev = adapter->pdev;
2840
2841 vfree(rx_ring->lro_mgr.lro_arr);
2842 rx_ring->lro_mgr.lro_arr = NULL;
2843
2844 ixgbe_clean_rx_ring(adapter, rx_ring);
2845
2846 vfree(rx_ring->rx_buffer_info);
2847 rx_ring->rx_buffer_info = NULL;
2848
2849 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2850
2851 rx_ring->desc = NULL;
2852 }
2853
2854 /**
2855 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
2856 * @adapter: board private structure
2857 *
2858 * Free all receive software resources
2859 **/
2860 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
2861 {
2862 int i;
2863
2864 for (i = 0; i < adapter->num_rx_queues; i++)
2865 ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
2866 }
2867
2868 /**
2869 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
2870 * @adapter: board private structure
2871 *
2872 * If this function returns with an error, then it's possible one or
2873 * more of the rings is populated (while the rest are not). It is the
2874 * callers duty to clean those orphaned rings.
2875 *
2876 * Return 0 on success, negative on failure
2877 **/
2878 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
2879 {
2880 int i, err = 0;
2881
2882 for (i = 0; i < adapter->num_tx_queues; i++) {
2883 err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]);
2884 if (err) {
2885 DPRINTK(PROBE, ERR,
2886 "Allocation for Tx Queue %u failed\n", i);
2887 break;
2888 }
2889 }
2890
2891 return err;
2892 }
2893
2894 /**
2895 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
2896 * @adapter: board private structure
2897 *
2898 * If this function returns with an error, then it's possible one or
2899 * more of the rings is populated (while the rest are not). It is the
2900 * callers duty to clean those orphaned rings.
2901 *
2902 * Return 0 on success, negative on failure
2903 **/
2904
2905 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
2906 {
2907 int i, err = 0;
2908
2909 for (i = 0; i < adapter->num_rx_queues; i++) {
2910 err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]);
2911 if (err) {
2912 DPRINTK(PROBE, ERR,
2913 "Allocation for Rx Queue %u failed\n", i);
2914 break;
2915 }
2916 }
2917
2918 return err;
2919 }
2920
2921 /**
2922 * ixgbe_change_mtu - Change the Maximum Transfer Unit
2923 * @netdev: network interface device structure
2924 * @new_mtu: new value for maximum frame size
2925 *
2926 * Returns 0 on success, negative on failure
2927 **/
2928 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
2929 {
2930 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2931 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2932
2933 /* MTU < 68 is an error and causes problems on some kernels */
2934 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
2935 return -EINVAL;
2936
2937 DPRINTK(PROBE, INFO, "changing MTU from %d to %d\n",
2938 netdev->mtu, new_mtu);
2939 /* must set new MTU before calling down or up */
2940 netdev->mtu = new_mtu;
2941
2942 if (netif_running(netdev))
2943 ixgbe_reinit_locked(adapter);
2944
2945 return 0;
2946 }
2947
2948 /**
2949 * ixgbe_open - Called when a network interface is made active
2950 * @netdev: network interface device structure
2951 *
2952 * Returns 0 on success, negative value on failure
2953 *
2954 * The open entry point is called when a network interface is made
2955 * active by the system (IFF_UP). At this point all resources needed
2956 * for transmit and receive operations are allocated, the interrupt
2957 * handler is registered with the OS, the watchdog timer is started,
2958 * and the stack is notified that the interface is ready.
2959 **/
2960 static int ixgbe_open(struct net_device *netdev)
2961 {
2962 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2963 int err;
2964
2965 /* disallow open during test */
2966 if (test_bit(__IXGBE_TESTING, &adapter->state))
2967 return -EBUSY;
2968
2969 /* allocate transmit descriptors */
2970 err = ixgbe_setup_all_tx_resources(adapter);
2971 if (err)
2972 goto err_setup_tx;
2973
2974 /* allocate receive descriptors */
2975 err = ixgbe_setup_all_rx_resources(adapter);
2976 if (err)
2977 goto err_setup_rx;
2978
2979 ixgbe_configure(adapter);
2980
2981 err = ixgbe_request_irq(adapter);
2982 if (err)
2983 goto err_req_irq;
2984
2985 err = ixgbe_up_complete(adapter);
2986 if (err)
2987 goto err_up;
2988
2989 netif_tx_start_all_queues(netdev);
2990
2991 return 0;
2992
2993 err_up:
2994 ixgbe_release_hw_control(adapter);
2995 ixgbe_free_irq(adapter);
2996 err_req_irq:
2997 ixgbe_free_all_rx_resources(adapter);
2998 err_setup_rx:
2999 ixgbe_free_all_tx_resources(adapter);
3000 err_setup_tx:
3001 ixgbe_reset(adapter);
3002
3003 return err;
3004 }
3005
3006 /**
3007 * ixgbe_close - Disables a network interface
3008 * @netdev: network interface device structure
3009 *
3010 * Returns 0, this is not allowed to fail
3011 *
3012 * The close entry point is called when an interface is de-activated
3013 * by the OS. The hardware is still under the drivers control, but
3014 * needs to be disabled. A global MAC reset is issued to stop the
3015 * hardware, and all transmit and receive resources are freed.
3016 **/
3017 static int ixgbe_close(struct net_device *netdev)
3018 {
3019 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3020
3021 ixgbe_down(adapter);
3022 ixgbe_free_irq(adapter);
3023
3024 ixgbe_free_all_tx_resources(adapter);
3025 ixgbe_free_all_rx_resources(adapter);
3026
3027 ixgbe_release_hw_control(adapter);
3028
3029 return 0;
3030 }
3031
3032 /**
3033 * ixgbe_update_stats - Update the board statistics counters.
3034 * @adapter: board private structure
3035 **/
3036 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
3037 {
3038 struct ixgbe_hw *hw = &adapter->hw;
3039 u64 total_mpc = 0;
3040 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
3041
3042 adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
3043 for (i = 0; i < 8; i++) {
3044 /* for packet buffers not used, the register should read 0 */
3045 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
3046 missed_rx += mpc;
3047 adapter->stats.mpc[i] += mpc;
3048 total_mpc += adapter->stats.mpc[i];
3049 adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
3050 }
3051 adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
3052 /* work around hardware counting issue */
3053 adapter->stats.gprc -= missed_rx;
3054
3055 /* 82598 hardware only has a 32 bit counter in the high register */
3056 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
3057 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
3058 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
3059 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
3060 adapter->stats.bprc += bprc;
3061 adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
3062 adapter->stats.mprc -= bprc;
3063 adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
3064 adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
3065 adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
3066 adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
3067 adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
3068 adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
3069 adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
3070 adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
3071 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
3072 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
3073 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
3074 adapter->stats.lxontxc += lxon;
3075 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
3076 adapter->stats.lxofftxc += lxoff;
3077 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
3078 adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
3079 adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
3080 /*
3081 * 82598 errata - tx of flow control packets is included in tx counters
3082 */
3083 xon_off_tot = lxon + lxoff;
3084 adapter->stats.gptc -= xon_off_tot;
3085 adapter->stats.mptc -= xon_off_tot;
3086 adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
3087 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
3088 adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
3089 adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
3090 adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
3091 adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
3092 adapter->stats.ptc64 -= xon_off_tot;
3093 adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
3094 adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
3095 adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
3096 adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
3097 adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
3098 adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
3099
3100 /* Fill out the OS statistics structure */
3101 adapter->net_stats.multicast = adapter->stats.mprc;
3102
3103 /* Rx Errors */
3104 adapter->net_stats.rx_errors = adapter->stats.crcerrs +
3105 adapter->stats.rlec;
3106 adapter->net_stats.rx_dropped = 0;
3107 adapter->net_stats.rx_length_errors = adapter->stats.rlec;
3108 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3109 adapter->net_stats.rx_missed_errors = total_mpc;
3110 }
3111
3112 /**
3113 * ixgbe_watchdog - Timer Call-back
3114 * @data: pointer to adapter cast into an unsigned long
3115 **/
3116 static void ixgbe_watchdog(unsigned long data)
3117 {
3118 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
3119 struct ixgbe_hw *hw = &adapter->hw;
3120
3121 /* Do the watchdog outside of interrupt context due to the lovely
3122 * delays that some of the newer hardware requires */
3123 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
3124 /* Cause software interrupt to ensure rx rings are cleaned */
3125 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3126 u32 eics =
3127 (1 << (adapter->num_msix_vectors - NON_Q_VECTORS)) - 1;
3128 IXGBE_WRITE_REG(hw, IXGBE_EICS, eics);
3129 } else {
3130 /* For legacy and MSI interrupts don't set any bits that
3131 * are enabled for EIAM, because this operation would
3132 * set *both* EIMS and EICS for any bit in EIAM */
3133 IXGBE_WRITE_REG(hw, IXGBE_EICS,
3134 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
3135 }
3136 /* Reset the timer */
3137 mod_timer(&adapter->watchdog_timer,
3138 round_jiffies(jiffies + 2 * HZ));
3139 }
3140
3141 schedule_work(&adapter->watchdog_task);
3142 }
3143
3144 /**
3145 * ixgbe_watchdog_task - worker thread to bring link up
3146 * @work: pointer to work_struct containing our data
3147 **/
3148 static void ixgbe_watchdog_task(struct work_struct *work)
3149 {
3150 struct ixgbe_adapter *adapter = container_of(work,
3151 struct ixgbe_adapter,
3152 watchdog_task);
3153 struct net_device *netdev = adapter->netdev;
3154 struct ixgbe_hw *hw = &adapter->hw;
3155 u32 link_speed = adapter->link_speed;
3156 bool link_up = adapter->link_up;
3157
3158 adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
3159
3160 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
3161 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
3162 if (link_up ||
3163 time_after(jiffies, (adapter->link_check_timeout +
3164 IXGBE_TRY_LINK_TIMEOUT))) {
3165 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
3166 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
3167 }
3168 adapter->link_up = link_up;
3169 adapter->link_speed = link_speed;
3170 }
3171
3172 if (link_up) {
3173 if (!netif_carrier_ok(netdev)) {
3174 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3175 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
3176 #define FLOW_RX (frctl & IXGBE_FCTRL_RFCE)
3177 #define FLOW_TX (rmcs & IXGBE_RMCS_TFCE_802_3X)
3178 DPRINTK(LINK, INFO, "NIC Link is Up %s, "
3179 "Flow Control: %s\n",
3180 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
3181 "10 Gbps" :
3182 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
3183 "1 Gbps" : "unknown speed")),
3184 ((FLOW_RX && FLOW_TX) ? "RX/TX" :
3185 (FLOW_RX ? "RX" :
3186 (FLOW_TX ? "TX" : "None"))));
3187
3188 netif_carrier_on(netdev);
3189 netif_tx_wake_all_queues(netdev);
3190 } else {
3191 /* Force detection of hung controller */
3192 adapter->detect_tx_hung = true;
3193 }
3194 } else {
3195 adapter->link_up = false;
3196 adapter->link_speed = 0;
3197 if (netif_carrier_ok(netdev)) {
3198 DPRINTK(LINK, INFO, "NIC Link is Down\n");
3199 netif_carrier_off(netdev);
3200 netif_tx_stop_all_queues(netdev);
3201 }
3202 }
3203
3204 ixgbe_update_stats(adapter);
3205 adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
3206 }
3207
3208 static int ixgbe_tso(struct ixgbe_adapter *adapter,
3209 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
3210 u32 tx_flags, u8 *hdr_len)
3211 {
3212 struct ixgbe_adv_tx_context_desc *context_desc;
3213 unsigned int i;
3214 int err;
3215 struct ixgbe_tx_buffer *tx_buffer_info;
3216 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
3217 u32 mss_l4len_idx, l4len;
3218
3219 if (skb_is_gso(skb)) {
3220 if (skb_header_cloned(skb)) {
3221 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
3222 if (err)
3223 return err;
3224 }
3225 l4len = tcp_hdrlen(skb);
3226 *hdr_len += l4len;
3227
3228 if (skb->protocol == htons(ETH_P_IP)) {
3229 struct iphdr *iph = ip_hdr(skb);
3230 iph->tot_len = 0;
3231 iph->check = 0;
3232 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
3233 iph->daddr, 0,
3234 IPPROTO_TCP,
3235 0);
3236 adapter->hw_tso_ctxt++;
3237 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
3238 ipv6_hdr(skb)->payload_len = 0;
3239 tcp_hdr(skb)->check =
3240 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
3241 &ipv6_hdr(skb)->daddr,
3242 0, IPPROTO_TCP, 0);
3243 adapter->hw_tso6_ctxt++;
3244 }
3245
3246 i = tx_ring->next_to_use;
3247
3248 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3249 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
3250
3251 /* VLAN MACLEN IPLEN */
3252 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3253 vlan_macip_lens |=
3254 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
3255 vlan_macip_lens |= ((skb_network_offset(skb)) <<
3256 IXGBE_ADVTXD_MACLEN_SHIFT);
3257 *hdr_len += skb_network_offset(skb);
3258 vlan_macip_lens |=
3259 (skb_transport_header(skb) - skb_network_header(skb));
3260 *hdr_len +=
3261 (skb_transport_header(skb) - skb_network_header(skb));
3262 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
3263 context_desc->seqnum_seed = 0;
3264
3265 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
3266 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
3267 IXGBE_ADVTXD_DTYP_CTXT);
3268
3269 if (skb->protocol == htons(ETH_P_IP))
3270 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
3271 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
3272 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
3273
3274 /* MSS L4LEN IDX */
3275 mss_l4len_idx =
3276 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
3277 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
3278 /* use index 1 for TSO */
3279 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
3280 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
3281
3282 tx_buffer_info->time_stamp = jiffies;
3283 tx_buffer_info->next_to_watch = i;
3284
3285 i++;
3286 if (i == tx_ring->count)
3287 i = 0;
3288 tx_ring->next_to_use = i;
3289
3290 return true;
3291 }
3292 return false;
3293 }
3294
3295 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
3296 struct ixgbe_ring *tx_ring,
3297 struct sk_buff *skb, u32 tx_flags)
3298 {
3299 struct ixgbe_adv_tx_context_desc *context_desc;
3300 unsigned int i;
3301 struct ixgbe_tx_buffer *tx_buffer_info;
3302 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
3303
3304 if (skb->ip_summed == CHECKSUM_PARTIAL ||
3305 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
3306 i = tx_ring->next_to_use;
3307 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3308 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
3309
3310 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3311 vlan_macip_lens |=
3312 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
3313 vlan_macip_lens |= (skb_network_offset(skb) <<
3314 IXGBE_ADVTXD_MACLEN_SHIFT);
3315 if (skb->ip_summed == CHECKSUM_PARTIAL)
3316 vlan_macip_lens |= (skb_transport_header(skb) -
3317 skb_network_header(skb));
3318
3319 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
3320 context_desc->seqnum_seed = 0;
3321
3322 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
3323 IXGBE_ADVTXD_DTYP_CTXT);
3324
3325 if (skb->ip_summed == CHECKSUM_PARTIAL) {
3326 switch (skb->protocol) {
3327 case __constant_htons(ETH_P_IP):
3328 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
3329 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
3330 type_tucmd_mlhl |=
3331 IXGBE_ADVTXD_TUCMD_L4T_TCP;
3332 break;
3333 case __constant_htons(ETH_P_IPV6):
3334 /* XXX what about other V6 headers?? */
3335 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
3336 type_tucmd_mlhl |=
3337 IXGBE_ADVTXD_TUCMD_L4T_TCP;
3338 break;
3339 default:
3340 if (unlikely(net_ratelimit())) {
3341 DPRINTK(PROBE, WARNING,
3342 "partial checksum but proto=%x!\n",
3343 skb->protocol);
3344 }
3345 break;
3346 }
3347 }
3348
3349 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
3350 /* use index zero for tx checksum offload */
3351 context_desc->mss_l4len_idx = 0;
3352
3353 tx_buffer_info->time_stamp = jiffies;
3354 tx_buffer_info->next_to_watch = i;
3355
3356 adapter->hw_csum_tx_good++;
3357 i++;
3358 if (i == tx_ring->count)
3359 i = 0;
3360 tx_ring->next_to_use = i;
3361
3362 return true;
3363 }
3364
3365 return false;
3366 }
3367
3368 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
3369 struct ixgbe_ring *tx_ring,
3370 struct sk_buff *skb, unsigned int first)
3371 {
3372 struct ixgbe_tx_buffer *tx_buffer_info;
3373 unsigned int len = skb->len;
3374 unsigned int offset = 0, size, count = 0, i;
3375 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
3376 unsigned int f;
3377
3378 len -= skb->data_len;
3379
3380 i = tx_ring->next_to_use;
3381
3382 while (len) {
3383 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3384 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
3385
3386 tx_buffer_info->length = size;
3387 tx_buffer_info->dma = pci_map_single(adapter->pdev,
3388 skb->data + offset,
3389 size, PCI_DMA_TODEVICE);
3390 tx_buffer_info->time_stamp = jiffies;
3391 tx_buffer_info->next_to_watch = i;
3392
3393 len -= size;
3394 offset += size;
3395 count++;
3396 i++;
3397 if (i == tx_ring->count)
3398 i = 0;
3399 }
3400
3401 for (f = 0; f < nr_frags; f++) {
3402 struct skb_frag_struct *frag;
3403
3404 frag = &skb_shinfo(skb)->frags[f];
3405 len = frag->size;
3406 offset = frag->page_offset;
3407
3408 while (len) {
3409 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3410 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
3411
3412 tx_buffer_info->length = size;
3413 tx_buffer_info->dma = pci_map_page(adapter->pdev,
3414 frag->page,
3415 offset,
3416 size, PCI_DMA_TODEVICE);
3417 tx_buffer_info->time_stamp = jiffies;
3418 tx_buffer_info->next_to_watch = i;
3419
3420 len -= size;
3421 offset += size;
3422 count++;
3423 i++;
3424 if (i == tx_ring->count)
3425 i = 0;
3426 }
3427 }
3428 if (i == 0)
3429 i = tx_ring->count - 1;
3430 else
3431 i = i - 1;
3432 tx_ring->tx_buffer_info[i].skb = skb;
3433 tx_ring->tx_buffer_info[first].next_to_watch = i;
3434
3435 return count;
3436 }
3437
3438 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
3439 struct ixgbe_ring *tx_ring,
3440 int tx_flags, int count, u32 paylen, u8 hdr_len)
3441 {
3442 union ixgbe_adv_tx_desc *tx_desc = NULL;
3443 struct ixgbe_tx_buffer *tx_buffer_info;
3444 u32 olinfo_status = 0, cmd_type_len = 0;
3445 unsigned int i;
3446 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
3447
3448 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
3449
3450 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
3451
3452 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3453 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
3454
3455 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
3456 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
3457
3458 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
3459 IXGBE_ADVTXD_POPTS_SHIFT;
3460
3461 /* use index 1 context for tso */
3462 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
3463 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
3464 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
3465 IXGBE_ADVTXD_POPTS_SHIFT;
3466
3467 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
3468 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
3469 IXGBE_ADVTXD_POPTS_SHIFT;
3470
3471 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
3472
3473 i = tx_ring->next_to_use;
3474 while (count--) {
3475 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3476 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
3477 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
3478 tx_desc->read.cmd_type_len =
3479 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
3480 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
3481
3482 i++;
3483 if (i == tx_ring->count)
3484 i = 0;
3485 }
3486
3487 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
3488
3489 /*
3490 * Force memory writes to complete before letting h/w
3491 * know there are new descriptors to fetch. (Only
3492 * applicable for weak-ordered memory model archs,
3493 * such as IA-64).
3494 */
3495 wmb();
3496
3497 tx_ring->next_to_use = i;
3498 writel(i, adapter->hw.hw_addr + tx_ring->tail);
3499 }
3500
3501 static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
3502 struct ixgbe_ring *tx_ring, int size)
3503 {
3504 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3505
3506 netif_stop_subqueue(netdev, tx_ring->queue_index);
3507 /* Herbert's original patch had:
3508 * smp_mb__after_netif_stop_queue();
3509 * but since that doesn't exist yet, just open code it. */
3510 smp_mb();
3511
3512 /* We need to check again in a case another CPU has just
3513 * made room available. */
3514 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
3515 return -EBUSY;
3516
3517 /* A reprieve! - use start_queue because it doesn't call schedule */
3518 netif_start_subqueue(netdev, tx_ring->queue_index);
3519 ++adapter->restart_queue;
3520 return 0;
3521 }
3522
3523 static int ixgbe_maybe_stop_tx(struct net_device *netdev,
3524 struct ixgbe_ring *tx_ring, int size)
3525 {
3526 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
3527 return 0;
3528 return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
3529 }
3530
3531
3532 static int ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3533 {
3534 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3535 struct ixgbe_ring *tx_ring;
3536 unsigned int first;
3537 unsigned int tx_flags = 0;
3538 u8 hdr_len = 0;
3539 int r_idx = 0, tso;
3540 int count = 0;
3541 unsigned int f;
3542
3543 r_idx = (adapter->num_tx_queues - 1) & skb->queue_mapping;
3544 tx_ring = &adapter->tx_ring[r_idx];
3545
3546 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
3547 tx_flags |= vlan_tx_tag_get(skb);
3548 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
3549 tx_flags |= IXGBE_TX_FLAGS_VLAN;
3550 }
3551 /* three things can cause us to need a context descriptor */
3552 if (skb_is_gso(skb) ||
3553 (skb->ip_summed == CHECKSUM_PARTIAL) ||
3554 (tx_flags & IXGBE_TX_FLAGS_VLAN))
3555 count++;
3556
3557 count += TXD_USE_COUNT(skb_headlen(skb));
3558 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
3559 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
3560
3561 if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
3562 adapter->tx_busy++;
3563 return NETDEV_TX_BUSY;
3564 }
3565
3566 if (skb->protocol == htons(ETH_P_IP))
3567 tx_flags |= IXGBE_TX_FLAGS_IPV4;
3568 first = tx_ring->next_to_use;
3569 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
3570 if (tso < 0) {
3571 dev_kfree_skb_any(skb);
3572 return NETDEV_TX_OK;
3573 }
3574
3575 if (tso)
3576 tx_flags |= IXGBE_TX_FLAGS_TSO;
3577 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
3578 (skb->ip_summed == CHECKSUM_PARTIAL))
3579 tx_flags |= IXGBE_TX_FLAGS_CSUM;
3580
3581 ixgbe_tx_queue(adapter, tx_ring, tx_flags,
3582 ixgbe_tx_map(adapter, tx_ring, skb, first),
3583 skb->len, hdr_len);
3584
3585 netdev->trans_start = jiffies;
3586
3587 ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
3588
3589 return NETDEV_TX_OK;
3590 }
3591
3592 /**
3593 * ixgbe_get_stats - Get System Network Statistics
3594 * @netdev: network interface device structure
3595 *
3596 * Returns the address of the device statistics structure.
3597 * The statistics are actually updated from the timer callback.
3598 **/
3599 static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
3600 {
3601 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3602
3603 /* only return the current stats */
3604 return &adapter->net_stats;
3605 }
3606
3607 /**
3608 * ixgbe_set_mac - Change the Ethernet Address of the NIC
3609 * @netdev: network interface device structure
3610 * @p: pointer to an address structure
3611 *
3612 * Returns 0 on success, negative on failure
3613 **/
3614 static int ixgbe_set_mac(struct net_device *netdev, void *p)
3615 {
3616 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3617 struct sockaddr *addr = p;
3618
3619 if (!is_valid_ether_addr(addr->sa_data))
3620 return -EADDRNOTAVAIL;
3621
3622 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3623 memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
3624
3625 adapter->hw.mac.ops.set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV);
3626
3627 return 0;
3628 }
3629
3630 #ifdef CONFIG_NET_POLL_CONTROLLER
3631 /*
3632 * Polling 'interrupt' - used by things like netconsole to send skbs
3633 * without having to re-enable interrupts. It's not called while
3634 * the interrupt routine is executing.
3635 */
3636 static void ixgbe_netpoll(struct net_device *netdev)
3637 {
3638 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3639
3640 disable_irq(adapter->pdev->irq);
3641 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
3642 ixgbe_intr(adapter->pdev->irq, netdev);
3643 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
3644 enable_irq(adapter->pdev->irq);
3645 }
3646 #endif
3647
3648 /**
3649 * ixgbe_link_config - set up initial link with default speed and duplex
3650 * @hw: pointer to private hardware struct
3651 *
3652 * Returns 0 on success, negative on failure
3653 **/
3654 static int ixgbe_link_config(struct ixgbe_hw *hw)
3655 {
3656 u32 autoneg = IXGBE_LINK_SPEED_10GB_FULL;
3657
3658 /* must always autoneg for both 1G and 10G link */
3659 hw->mac.autoneg = true;
3660
3661 return hw->mac.ops.setup_link_speed(hw, autoneg, true, true);
3662 }
3663
3664 /**
3665 * ixgbe_napi_add_all - prep napi structs for use
3666 * @adapter: private struct
3667 * helper function to napi_add each possible q_vector->napi
3668 */
3669 static void ixgbe_napi_add_all(struct ixgbe_adapter *adapter)
3670 {
3671 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3672 int (*poll)(struct napi_struct *, int);
3673
3674 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3675 poll = &ixgbe_clean_rxonly;
3676 } else {
3677 poll = &ixgbe_poll;
3678 /* only one q_vector for legacy modes */
3679 q_vectors = 1;
3680 }
3681
3682 for (i = 0; i < q_vectors; i++) {
3683 struct ixgbe_q_vector *q_vector = &adapter->q_vector[i];
3684 netif_napi_add(adapter->netdev, &q_vector->napi,
3685 (*poll), 64);
3686 }
3687 }
3688
3689 /**
3690 * ixgbe_probe - Device Initialization Routine
3691 * @pdev: PCI device information struct
3692 * @ent: entry in ixgbe_pci_tbl
3693 *
3694 * Returns 0 on success, negative on failure
3695 *
3696 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
3697 * The OS initialization, configuring of the adapter private structure,
3698 * and a hardware reset occur.
3699 **/
3700 static int __devinit ixgbe_probe(struct pci_dev *pdev,
3701 const struct pci_device_id *ent)
3702 {
3703 struct net_device *netdev;
3704 struct ixgbe_adapter *adapter = NULL;
3705 struct ixgbe_hw *hw;
3706 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
3707 static int cards_found;
3708 int i, err, pci_using_dac;
3709 u16 link_status, link_speed, link_width;
3710 u32 part_num, eec;
3711
3712 err = pci_enable_device(pdev);
3713 if (err)
3714 return err;
3715
3716 if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK) &&
3717 !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) {
3718 pci_using_dac = 1;
3719 } else {
3720 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
3721 if (err) {
3722 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
3723 if (err) {
3724 dev_err(&pdev->dev, "No usable DMA configuration, "
3725 "aborting\n");
3726 goto err_dma;
3727 }
3728 }
3729 pci_using_dac = 0;
3730 }
3731
3732 err = pci_request_regions(pdev, ixgbe_driver_name);
3733 if (err) {
3734 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
3735 goto err_pci_reg;
3736 }
3737
3738 pci_set_master(pdev);
3739 pci_save_state(pdev);
3740
3741 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES);
3742 if (!netdev) {
3743 err = -ENOMEM;
3744 goto err_alloc_etherdev;
3745 }
3746
3747 SET_NETDEV_DEV(netdev, &pdev->dev);
3748
3749 pci_set_drvdata(pdev, netdev);
3750 adapter = netdev_priv(netdev);
3751
3752 adapter->netdev = netdev;
3753 adapter->pdev = pdev;
3754 hw = &adapter->hw;
3755 hw->back = adapter;
3756 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
3757
3758 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
3759 pci_resource_len(pdev, 0));
3760 if (!hw->hw_addr) {
3761 err = -EIO;
3762 goto err_ioremap;
3763 }
3764
3765 for (i = 1; i <= 5; i++) {
3766 if (pci_resource_len(pdev, i) == 0)
3767 continue;
3768 }
3769
3770 netdev->open = &ixgbe_open;
3771 netdev->stop = &ixgbe_close;
3772 netdev->hard_start_xmit = &ixgbe_xmit_frame;
3773 netdev->get_stats = &ixgbe_get_stats;
3774 netdev->set_rx_mode = &ixgbe_set_rx_mode;
3775 netdev->set_multicast_list = &ixgbe_set_rx_mode;
3776 netdev->set_mac_address = &ixgbe_set_mac;
3777 netdev->change_mtu = &ixgbe_change_mtu;
3778 ixgbe_set_ethtool_ops(netdev);
3779 netdev->tx_timeout = &ixgbe_tx_timeout;
3780 netdev->watchdog_timeo = 5 * HZ;
3781 netdev->vlan_rx_register = ixgbe_vlan_rx_register;
3782 netdev->vlan_rx_add_vid = ixgbe_vlan_rx_add_vid;
3783 netdev->vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid;
3784 #ifdef CONFIG_NET_POLL_CONTROLLER
3785 netdev->poll_controller = ixgbe_netpoll;
3786 #endif
3787 strcpy(netdev->name, pci_name(pdev));
3788
3789 adapter->bd_number = cards_found;
3790
3791 /* Setup hw api */
3792 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
3793 hw->mac.type = ii->mac;
3794
3795 /* EEPROM */
3796 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
3797 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
3798 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
3799 if (!(eec & (1 << 8)))
3800 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
3801
3802 /* PHY */
3803 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
3804 /* phy->sfp_type = ixgbe_sfp_type_unknown; */
3805
3806 err = ii->get_invariants(hw);
3807 if (err)
3808 goto err_hw_init;
3809
3810 /* setup the private structure */
3811 err = ixgbe_sw_init(adapter);
3812 if (err)
3813 goto err_sw_init;
3814
3815 /* reset_hw fills in the perm_addr as well */
3816 err = hw->mac.ops.reset_hw(hw);
3817 if (err) {
3818 dev_err(&adapter->pdev->dev, "HW Init failed: %d\n", err);
3819 goto err_sw_init;
3820 }
3821
3822 netdev->features = NETIF_F_SG |
3823 NETIF_F_IP_CSUM |
3824 NETIF_F_HW_VLAN_TX |
3825 NETIF_F_HW_VLAN_RX |
3826 NETIF_F_HW_VLAN_FILTER;
3827
3828 netdev->features |= NETIF_F_IPV6_CSUM;
3829 netdev->features |= NETIF_F_TSO;
3830 netdev->features |= NETIF_F_TSO6;
3831 netdev->features |= NETIF_F_LRO;
3832
3833 netdev->vlan_features |= NETIF_F_TSO;
3834 netdev->vlan_features |= NETIF_F_TSO6;
3835 netdev->vlan_features |= NETIF_F_IP_CSUM;
3836 netdev->vlan_features |= NETIF_F_SG;
3837
3838 if (pci_using_dac)
3839 netdev->features |= NETIF_F_HIGHDMA;
3840
3841 /* make sure the EEPROM is good */
3842 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
3843 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
3844 err = -EIO;
3845 goto err_eeprom;
3846 }
3847
3848 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
3849 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
3850
3851 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
3852 dev_err(&pdev->dev, "invalid MAC address\n");
3853 err = -EIO;
3854 goto err_eeprom;
3855 }
3856
3857 init_timer(&adapter->watchdog_timer);
3858 adapter->watchdog_timer.function = &ixgbe_watchdog;
3859 adapter->watchdog_timer.data = (unsigned long)adapter;
3860
3861 INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
3862 INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
3863
3864 err = ixgbe_init_interrupt_scheme(adapter);
3865 if (err)
3866 goto err_sw_init;
3867
3868 /* print bus type/speed/width info */
3869 pci_read_config_word(pdev, IXGBE_PCI_LINK_STATUS, &link_status);
3870 link_speed = link_status & IXGBE_PCI_LINK_SPEED;
3871 link_width = link_status & IXGBE_PCI_LINK_WIDTH;
3872 dev_info(&pdev->dev, "(PCI Express:%s:%s) "
3873 "%02x:%02x:%02x:%02x:%02x:%02x\n",
3874 ((link_speed == IXGBE_PCI_LINK_SPEED_5000) ? "5.0Gb/s" :
3875 (link_speed == IXGBE_PCI_LINK_SPEED_2500) ? "2.5Gb/s" :
3876 "Unknown"),
3877 ((link_width == IXGBE_PCI_LINK_WIDTH_8) ? "Width x8" :
3878 (link_width == IXGBE_PCI_LINK_WIDTH_4) ? "Width x4" :
3879 (link_width == IXGBE_PCI_LINK_WIDTH_2) ? "Width x2" :
3880 (link_width == IXGBE_PCI_LINK_WIDTH_1) ? "Width x1" :
3881 "Unknown"),
3882 netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2],
3883 netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5]);
3884 ixgbe_read_pba_num_generic(hw, &part_num);
3885 dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
3886 hw->mac.type, hw->phy.type,
3887 (part_num >> 8), (part_num & 0xff));
3888
3889 if (link_width <= IXGBE_PCI_LINK_WIDTH_4) {
3890 dev_warn(&pdev->dev, "PCI-Express bandwidth available for "
3891 "this card is not sufficient for optimal "
3892 "performance.\n");
3893 dev_warn(&pdev->dev, "For optimal performance a x8 "
3894 "PCI-Express slot is required.\n");
3895 }
3896
3897 /* reset the hardware with the new settings */
3898 hw->mac.ops.start_hw(hw);
3899
3900 /* link_config depends on start_hw being called at least once */
3901 err = ixgbe_link_config(hw);
3902 if (err) {
3903 dev_err(&pdev->dev, "setup_link_speed FAILED %d\n", err);
3904 goto err_register;
3905 }
3906
3907 netif_carrier_off(netdev);
3908 netif_tx_stop_all_queues(netdev);
3909
3910 ixgbe_napi_add_all(adapter);
3911
3912 strcpy(netdev->name, "eth%d");
3913 err = register_netdev(netdev);
3914 if (err)
3915 goto err_register;
3916
3917 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
3918 if (dca_add_requester(&pdev->dev) == 0) {
3919 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
3920 /* always use CB2 mode, difference is masked
3921 * in the CB driver */
3922 IXGBE_WRITE_REG(hw, IXGBE_DCA_CTRL, 2);
3923 ixgbe_setup_dca(adapter);
3924 }
3925 #endif
3926
3927 dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
3928 cards_found++;
3929 return 0;
3930
3931 err_register:
3932 ixgbe_release_hw_control(adapter);
3933 err_hw_init:
3934 err_sw_init:
3935 ixgbe_reset_interrupt_capability(adapter);
3936 err_eeprom:
3937 iounmap(hw->hw_addr);
3938 err_ioremap:
3939 free_netdev(netdev);
3940 err_alloc_etherdev:
3941 pci_release_regions(pdev);
3942 err_pci_reg:
3943 err_dma:
3944 pci_disable_device(pdev);
3945 return err;
3946 }
3947
3948 /**
3949 * ixgbe_remove - Device Removal Routine
3950 * @pdev: PCI device information struct
3951 *
3952 * ixgbe_remove is called by the PCI subsystem to alert the driver
3953 * that it should release a PCI device. The could be caused by a
3954 * Hot-Plug event, or because the driver is going to be removed from
3955 * memory.
3956 **/
3957 static void __devexit ixgbe_remove(struct pci_dev *pdev)
3958 {
3959 struct net_device *netdev = pci_get_drvdata(pdev);
3960 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3961
3962 set_bit(__IXGBE_DOWN, &adapter->state);
3963 del_timer_sync(&adapter->watchdog_timer);
3964
3965 flush_scheduled_work();
3966
3967 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
3968 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
3969 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
3970 dca_remove_requester(&pdev->dev);
3971 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
3972 }
3973
3974 #endif
3975 unregister_netdev(netdev);
3976
3977 ixgbe_reset_interrupt_capability(adapter);
3978
3979 ixgbe_release_hw_control(adapter);
3980
3981 iounmap(adapter->hw.hw_addr);
3982 pci_release_regions(pdev);
3983
3984 DPRINTK(PROBE, INFO, "complete\n");
3985 kfree(adapter->tx_ring);
3986 kfree(adapter->rx_ring);
3987
3988 free_netdev(netdev);
3989
3990 pci_disable_device(pdev);
3991 }
3992
3993 /**
3994 * ixgbe_io_error_detected - called when PCI error is detected
3995 * @pdev: Pointer to PCI device
3996 * @state: The current pci connection state
3997 *
3998 * This function is called after a PCI bus error affecting
3999 * this device has been detected.
4000 */
4001 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
4002 pci_channel_state_t state)
4003 {
4004 struct net_device *netdev = pci_get_drvdata(pdev);
4005 struct ixgbe_adapter *adapter = netdev->priv;
4006
4007 netif_device_detach(netdev);
4008
4009 if (netif_running(netdev))
4010 ixgbe_down(adapter);
4011 pci_disable_device(pdev);
4012
4013 /* Request a slot slot reset. */
4014 return PCI_ERS_RESULT_NEED_RESET;
4015 }
4016
4017 /**
4018 * ixgbe_io_slot_reset - called after the pci bus has been reset.
4019 * @pdev: Pointer to PCI device
4020 *
4021 * Restart the card from scratch, as if from a cold-boot.
4022 */
4023 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
4024 {
4025 struct net_device *netdev = pci_get_drvdata(pdev);
4026 struct ixgbe_adapter *adapter = netdev->priv;
4027
4028 if (pci_enable_device(pdev)) {
4029 DPRINTK(PROBE, ERR,
4030 "Cannot re-enable PCI device after reset.\n");
4031 return PCI_ERS_RESULT_DISCONNECT;
4032 }
4033 pci_set_master(pdev);
4034 pci_restore_state(pdev);
4035
4036 pci_enable_wake(pdev, PCI_D3hot, 0);
4037 pci_enable_wake(pdev, PCI_D3cold, 0);
4038
4039 ixgbe_reset(adapter);
4040
4041 return PCI_ERS_RESULT_RECOVERED;
4042 }
4043
4044 /**
4045 * ixgbe_io_resume - called when traffic can start flowing again.
4046 * @pdev: Pointer to PCI device
4047 *
4048 * This callback is called when the error recovery driver tells us that
4049 * its OK to resume normal operation.
4050 */
4051 static void ixgbe_io_resume(struct pci_dev *pdev)
4052 {
4053 struct net_device *netdev = pci_get_drvdata(pdev);
4054 struct ixgbe_adapter *adapter = netdev->priv;
4055
4056 if (netif_running(netdev)) {
4057 if (ixgbe_up(adapter)) {
4058 DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
4059 return;
4060 }
4061 }
4062
4063 netif_device_attach(netdev);
4064
4065 }
4066
4067 static struct pci_error_handlers ixgbe_err_handler = {
4068 .error_detected = ixgbe_io_error_detected,
4069 .slot_reset = ixgbe_io_slot_reset,
4070 .resume = ixgbe_io_resume,
4071 };
4072
4073 static struct pci_driver ixgbe_driver = {
4074 .name = ixgbe_driver_name,
4075 .id_table = ixgbe_pci_tbl,
4076 .probe = ixgbe_probe,
4077 .remove = __devexit_p(ixgbe_remove),
4078 #ifdef CONFIG_PM
4079 .suspend = ixgbe_suspend,
4080 .resume = ixgbe_resume,
4081 #endif
4082 .shutdown = ixgbe_shutdown,
4083 .err_handler = &ixgbe_err_handler
4084 };
4085
4086 /**
4087 * ixgbe_init_module - Driver Registration Routine
4088 *
4089 * ixgbe_init_module is the first routine called when the driver is
4090 * loaded. All it does is register with the PCI subsystem.
4091 **/
4092 static int __init ixgbe_init_module(void)
4093 {
4094 int ret;
4095 printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
4096 ixgbe_driver_string, ixgbe_driver_version);
4097
4098 printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
4099
4100 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
4101 dca_register_notify(&dca_notifier);
4102
4103 #endif
4104 ret = pci_register_driver(&ixgbe_driver);
4105 return ret;
4106 }
4107 module_init(ixgbe_init_module);
4108
4109 /**
4110 * ixgbe_exit_module - Driver Exit Cleanup Routine
4111 *
4112 * ixgbe_exit_module is called just before the driver is removed
4113 * from memory.
4114 **/
4115 static void __exit ixgbe_exit_module(void)
4116 {
4117 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
4118 dca_unregister_notify(&dca_notifier);
4119 #endif
4120 pci_unregister_driver(&ixgbe_driver);
4121 }
4122
4123 #if defined(CONFIG_DCA) || defined(CONFIG_DCA_MODULE)
4124 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
4125 void *p)
4126 {
4127 int ret_val;
4128
4129 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
4130 __ixgbe_notify_dca);
4131
4132 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
4133 }
4134 #endif /* CONFIG_DCA or CONFIG_DCA_MODULE */
4135
4136 module_exit(ixgbe_exit_module);
4137
4138 /* ixgbe_main.c */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree