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net: Remove unused parameter of xfrm_gen_index()
[linux-2.6-block.git] / drivers / net / ixgbe / ixgbe_main.c
CommitLineData
9a799d71
AK		 1/*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
b4617240 4 Copyright(c) 1999 - 2008 Intel Corporation.
9a799d71
AK		 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:
9a799d71
AK		 23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26*******************************************************************************/
27
28#include <linux/types.h>
29#include <linux/module.h>
30#include <linux/pci.h>
31#include <linux/netdevice.h>
32#include <linux/vmalloc.h>
33#include <linux/string.h>
34#include <linux/in.h>
35#include <linux/ip.h>
36#include <linux/tcp.h>
37#include <linux/ipv6.h>
38#include <net/checksum.h>
39#include <net/ip6_checksum.h>
40#include <linux/ethtool.h>
41#include <linux/if_vlan.h>
42
43#include "ixgbe.h"
44#include "ixgbe_common.h"
45
46char ixgbe_driver_name[] = "ixgbe";
9c8eb720 47static const char ixgbe_driver_string[] =
b4617240 48 "Intel(R) 10 Gigabit PCI Express Network Driver";
9a799d71 49
51ac6445 50#define DRV_VERSION "1.3.30-k2"
9c8eb720 51const char ixgbe_driver_version[] = DRV_VERSION;
b4617240 52static char ixgbe_copyright[] = "Copyright (c) 1999-2007 Intel Corporation.";
9a799d71
AK		 53
54static const struct ixgbe_info *ixgbe_info_tbl[] = {
b4617240 55 [board_82598] = &ixgbe_82598_info,
9a799d71
AK		 56};
57
58/* ixgbe_pci_tbl - PCI Device ID Table
59 *
60 * Wildcard entries (PCI_ANY_ID) should come last
61 * Last entry must be all 0s
62 *
63 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
64 * Class, Class Mask, private data (not used) }
65 */
66static struct pci_device_id ixgbe_pci_tbl[] = {
67 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
3957d63d 68 board_82598 },
9a799d71 69 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
3957d63d 70 board_82598 },
0befdb3e
JB		 71 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT),
72 board_82598 },
9a799d71 73 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
3957d63d 74 board_82598 },
8d792cd9
JB		 75 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT),
76 board_82598 },
b95f5fcb
JB		 77 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR),
78 board_82598 },
9a799d71
AK		 79
80 /* required last entry */
81 {0, }
82};
83MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
84
5dd2d332 85#ifdef CONFIG_IXGBE_DCA
bd0362dd 86static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
b4617240 87 void *p);
bd0362dd
JC		 88static struct notifier_block dca_notifier = {
89 .notifier_call = ixgbe_notify_dca,
90 .next = NULL,
91 .priority = 0
92};
93#endif
94
9a799d71
AK		 95MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
96MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
97MODULE_LICENSE("GPL");
98MODULE_VERSION(DRV_VERSION);
99
100#define DEFAULT_DEBUG_LEVEL_SHIFT 3
101
5eba3699
AV		 102static 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,
b4617240 109 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
5eba3699
AV		 110}
111
112static 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,
b4617240 119 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
5eba3699 120}
9a799d71 121
9a799d71 122static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, u16 int_alloc_entry,
b4617240 123 u8 msix_vector)
9a799d71
AK		 124{
125 u32 ivar, index;
126
127 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
128 index = (int_alloc_entry >> 2) & 0x1F;
129 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR(index));
130 ivar &= ~(0xFF << (8 * (int_alloc_entry & 0x3)));
131 ivar |= (msix_vector << (8 * (int_alloc_entry & 0x3)));
132 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR(index), ivar);
133}
134
135static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
b4617240
PW		 136 struct ixgbe_tx_buffer
137 *tx_buffer_info)
9a799d71
AK		 138{
139 if (tx_buffer_info->dma) {
e01c31a5 140 pci_unmap_page(adapter->pdev, tx_buffer_info->dma,
b4617240 141 tx_buffer_info->length, PCI_DMA_TODEVICE);
9a799d71
AK		 142 tx_buffer_info->dma = 0;
143 }
144 if (tx_buffer_info->skb) {
145 dev_kfree_skb_any(tx_buffer_info->skb);
146 tx_buffer_info->skb = NULL;
147 }
148 /* tx_buffer_info must be completely set up in the transmit path */
149}
150
151static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
b4617240
PW		 152 struct ixgbe_ring *tx_ring,
153 unsigned int eop)
9a799d71 154{
e01c31a5
JB		 155 struct ixgbe_hw *hw = &adapter->hw;
156 u32 head, tail;
157
9a799d71 158 /* Detect a transmit hang in hardware, this serializes the
e01c31a5
JB		 159 * check with the clearing of time_stamp and movement of eop */
160 head = IXGBE_READ_REG(hw, tx_ring->head);
161 tail = IXGBE_READ_REG(hw, tx_ring->tail);
9a799d71 162 adapter->detect_tx_hung = false;
e01c31a5
JB		 163 if ((head != tail) &&
164 tx_ring->tx_buffer_info[eop].time_stamp &&
9a799d71
AK		 165 time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
166 !(IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & IXGBE_TFCS_TXOFF)) {
167 /* detected Tx unit hang */
e01c31a5
JB		 168 union ixgbe_adv_tx_desc *tx_desc;
169 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
9a799d71 170 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
e01c31a5
JB		 171 " Tx Queue <%d>\n"
172 " TDH, TDT <%x>, <%x>\n"
9a799d71
AK		 173 " next_to_use <%x>\n"
174 " next_to_clean <%x>\n"
175 "tx_buffer_info[next_to_clean]\n"
176 " time_stamp <%lx>\n"
e01c31a5
JB		 177 " jiffies <%lx>\n",
178 tx_ring->queue_index,
179 head, tail,
180 tx_ring->next_to_use, eop,
181 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
9a799d71
AK		 182 return true;
183 }
184
185 return false;
186}
187
b4617240
PW		 188#define IXGBE_MAX_TXD_PWR 14
189#define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
e092be60
AV		 190
191/* Tx Descriptors needed, worst case */
192#define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
193 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
194#define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
b4617240 195 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
e092be60 196
e01c31a5
JB		 197#define GET_TX_HEAD_FROM_RING(ring) (\
198 *(volatile u32 *) \
199 ((union ixgbe_adv_tx_desc *)(ring)->desc + (ring)->count))
200static void ixgbe_tx_timeout(struct net_device *netdev);
201
9a799d71
AK		 202/**
203 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
204 * @adapter: board private structure
e01c31a5 205 * @tx_ring: tx ring to clean
9a799d71
AK		 206 **/
207static bool ixgbe_clean_tx_irq(struct ixgbe_adapter *adapter,
e01c31a5 208 struct ixgbe_ring *tx_ring)
9a799d71 209{
e01c31a5 210 union ixgbe_adv_tx_desc *tx_desc;
9a799d71 211 struct ixgbe_tx_buffer *tx_buffer_info;
e01c31a5
JB		 212 struct net_device *netdev = adapter->netdev;
213 struct sk_buff *skb;
214 unsigned int i;
215 u32 head, oldhead;
216 unsigned int count = 0;
217 unsigned int total_bytes = 0, total_packets = 0;
9a799d71 218
e01c31a5
JB		 219 rmb();
220 head = GET_TX_HEAD_FROM_RING(tx_ring);
221 head = le32_to_cpu(head);
9a799d71 222 i = tx_ring->next_to_clean;
e01c31a5
JB		 223 while (1) {
224 while (i != head) {
9a799d71
AK		 225 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
226 tx_buffer_info = &tx_ring->tx_buffer_info[i];
e01c31a5 227 skb = tx_buffer_info->skb;
9a799d71 228
e01c31a5 229 if (skb) {
e092be60 230 unsigned int segs, bytecount;
e01c31a5
JB		 231
232 /* gso_segs is currently only valid for tcp */
e092be60
AV		 233 segs = skb_shinfo(skb)->gso_segs ?: 1;
234 /* multiply data chunks by size of headers */
235 bytecount = ((segs - 1) * skb_headlen(skb)) +
e01c31a5
JB		 236 skb->len;
237 total_packets += segs;
238 total_bytes += bytecount;
e092be60 239 }
e01c31a5 240
9a799d71 241 ixgbe_unmap_and_free_tx_resource(adapter,
e01c31a5 242 tx_buffer_info);
9a799d71
AK		 243
244 i++;
245 if (i == tx_ring->count)
246 i = 0;
9a799d71 247
e01c31a5
JB		 248 count++;
249 if (count == tx_ring->count)
250 goto done_cleaning;
251 }
252 oldhead = head;
253 rmb();
254 head = GET_TX_HEAD_FROM_RING(tx_ring);
255 head = le32_to_cpu(head);
256 if (head == oldhead)
257 goto done_cleaning;
258 } /* while (1) */
259
260done_cleaning:
9a799d71
AK		 261 tx_ring->next_to_clean = i;
262
e092be60 263#define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
e01c31a5
JB		 264 if (unlikely(count && netif_carrier_ok(netdev) &&
265 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
e092be60
AV		 266 /* Make sure that anybody stopping the queue after this
267 * sees the new next_to_clean.
268 */
269 smp_mb();
30eba97a
AV		 270 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
271 !test_bit(__IXGBE_DOWN, &adapter->state)) {
272 netif_wake_subqueue(netdev, tx_ring->queue_index);
e01c31a5 273 ++adapter->restart_queue;
30eba97a 274 }
e092be60 275 }
9a799d71 276
e01c31a5
JB		 277 if (adapter->detect_tx_hung) {
278 if (ixgbe_check_tx_hang(adapter, tx_ring, i)) {
279 /* schedule immediate reset if we believe we hung */
280 DPRINTK(PROBE, INFO,
281 "tx hang %d detected, resetting adapter\n",
282 adapter->tx_timeout_count + 1);
283 ixgbe_tx_timeout(adapter->netdev);
284 }
285 }
9a799d71 286
e01c31a5
JB		 287 /* re-arm the interrupt */
288 if ((total_packets >= tx_ring->work_limit) ||
289 (count == tx_ring->count))
290 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, tx_ring->v_idx);
9a799d71 291
e01c31a5
JB		 292 tx_ring->total_bytes += total_bytes;
293 tx_ring->total_packets += total_packets;
294 tx_ring->stats.bytes += total_bytes;
295 tx_ring->stats.packets += total_packets;
296 adapter->net_stats.tx_bytes += total_bytes;
297 adapter->net_stats.tx_packets += total_packets;
298 return (total_packets ? true : false);
9a799d71
AK		 299}
300
5dd2d332 301#ifdef CONFIG_IXGBE_DCA
bd0362dd 302static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
b4617240 303 struct ixgbe_ring *rx_ring)
bd0362dd
JC		 304{
305 u32 rxctrl;
306 int cpu = get_cpu();
3a581073 307 int q = rx_ring - adapter->rx_ring;
bd0362dd 308
3a581073 309 if (rx_ring->cpu != cpu) {
bd0362dd
JC		 310 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
311 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
96b0e0f6 312 rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
bd0362dd
JC		 313 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
314 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
315 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
3a581073 316 rx_ring->cpu = cpu;
bd0362dd
JC		 317 }
318 put_cpu();
319}
320
321static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
b4617240 322 struct ixgbe_ring *tx_ring)
bd0362dd
JC		 323{
324 u32 txctrl;
325 int cpu = get_cpu();
3a581073 326 int q = tx_ring - adapter->tx_ring;
bd0362dd 327
3a581073 328 if (tx_ring->cpu != cpu) {
bd0362dd
JC		 329 txctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q));
330 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
96b0e0f6 331 txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
bd0362dd
JC		 332 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
333 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q), txctrl);
3a581073 334 tx_ring->cpu = cpu;
bd0362dd
JC		 335 }
336 put_cpu();
337}
338
339static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
340{
341 int i;
342
343 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
344 return;
345
346 for (i = 0; i < adapter->num_tx_queues; i++) {
347 adapter->tx_ring[i].cpu = -1;
348 ixgbe_update_tx_dca(adapter, &adapter->tx_ring[i]);
349 }
350 for (i = 0; i < adapter->num_rx_queues; i++) {
351 adapter->rx_ring[i].cpu = -1;
352 ixgbe_update_rx_dca(adapter, &adapter->rx_ring[i]);
353 }
354}
355
356static int __ixgbe_notify_dca(struct device *dev, void *data)
357{
358 struct net_device *netdev = dev_get_drvdata(dev);
359 struct ixgbe_adapter *adapter = netdev_priv(netdev);
360 unsigned long event = *(unsigned long *)data;
361
362 switch (event) {
363 case DCA_PROVIDER_ADD:
96b0e0f6
JB		 364 /* if we're already enabled, don't do it again */
365 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
366 break;
bd0362dd
JC		 367 /* Always use CB2 mode, difference is masked
368 * in the CB driver. */
369 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
652f093f 370 if (dca_add_requester(dev) == 0) {
96b0e0f6 371 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
bd0362dd
JC		 372 ixgbe_setup_dca(adapter);
373 break;
374 }
375 /* Fall Through since DCA is disabled. */
376 case DCA_PROVIDER_REMOVE:
377 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
378 dca_remove_requester(dev);
379 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
380 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
381 }
382 break;
383 }
384
652f093f 385 return 0;
bd0362dd
JC		 386}
387
5dd2d332 388#endif /* CONFIG_IXGBE_DCA */
9a799d71
AK		 389/**
390 * ixgbe_receive_skb - Send a completed packet up the stack
391 * @adapter: board private structure
392 * @skb: packet to send up
177db6ff
MC		 393 * @status: hardware indication of status of receive
394 * @rx_ring: rx descriptor ring (for a specific queue) to setup
395 * @rx_desc: rx descriptor
9a799d71
AK		 396 **/
397static void ixgbe_receive_skb(struct ixgbe_adapter *adapter,
b4617240
PW		 398 struct sk_buff *skb, u8 status,
399 struct ixgbe_ring *ring,
177db6ff 400 union ixgbe_adv_rx_desc *rx_desc)
9a799d71 401{
177db6ff
MC		 402 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
403 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
9a799d71 404
177db6ff
MC		 405 if (adapter->netdev->features & NETIF_F_LRO &&
406 skb->ip_summed == CHECKSUM_UNNECESSARY) {
9a799d71 407 if (adapter->vlgrp && is_vlan)
177db6ff
MC		 408 lro_vlan_hwaccel_receive_skb(&ring->lro_mgr, skb,
409 adapter->vlgrp, tag,
410 rx_desc);
9a799d71 411 else
177db6ff
MC		 412 lro_receive_skb(&ring->lro_mgr, skb, rx_desc);
413 ring->lro_used = true;
414 } else {
415 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
416 if (adapter->vlgrp && is_vlan)
417 vlan_hwaccel_receive_skb(skb, adapter->vlgrp, tag);
418 else
419 netif_receive_skb(skb);
420 } else {
421 if (adapter->vlgrp && is_vlan)
422 vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
423 else
424 netif_rx(skb);
425 }
9a799d71
AK		 426 }
427}
428
e59bd25d
AV		 429/**
430 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
431 * @adapter: address of board private structure
432 * @status_err: hardware indication of status of receive
433 * @skb: skb currently being received and modified
434 **/
9a799d71 435static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
712744be 436 u32 status_err, struct sk_buff *skb)
9a799d71
AK		 437{
438 skb->ip_summed = CHECKSUM_NONE;
439
712744be
JB		 440 /* Rx csum disabled */
441 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
9a799d71 442 return;
e59bd25d
AV		 443
444 /* if IP and error */
445 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
446 (status_err & IXGBE_RXDADV_ERR_IPE)) {
9a799d71
AK		 447 adapter->hw_csum_rx_error++;
448 return;
449 }
e59bd25d
AV		 450
451 if (!(status_err & IXGBE_RXD_STAT_L4CS))
452 return;
453
454 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
455 adapter->hw_csum_rx_error++;
456 return;
457 }
458
9a799d71 459 /* It must be a TCP or UDP packet with a valid checksum */
e59bd25d 460 skb->ip_summed = CHECKSUM_UNNECESSARY;
9a799d71
AK		 461 adapter->hw_csum_rx_good++;
462}
463
464/**
465 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
466 * @adapter: address of board private structure
467 **/
468static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
7c6e0a43
JB		 469 struct ixgbe_ring *rx_ring,
470 int cleaned_count)
9a799d71 471{
9a799d71
AK		 472 struct pci_dev *pdev = adapter->pdev;
473 union ixgbe_adv_rx_desc *rx_desc;
3a581073 474 struct ixgbe_rx_buffer *bi;
9a799d71 475 unsigned int i;
7c6e0a43 476 unsigned int bufsz = rx_ring->rx_buf_len + NET_IP_ALIGN;
9a799d71
AK		 477
478 i = rx_ring->next_to_use;
3a581073 479 bi = &rx_ring->rx_buffer_info[i];
9a799d71
AK		 480
481 while (cleaned_count--) {
482 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
483
762f4c57 484 if (!bi->page_dma &&
3a581073 485 (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) {
3a581073 486 if (!bi->page) {
762f4c57
JB		 487 bi->page = alloc_page(GFP_ATOMIC);
488 if (!bi->page) {
489 adapter->alloc_rx_page_failed++;
490 goto no_buffers;
491 }
492 bi->page_offset = 0;
493 } else {
494 /* use a half page if we're re-using */
495 bi->page_offset ^= (PAGE_SIZE / 2);
9a799d71 496 }
762f4c57
JB		 497
498 bi->page_dma = pci_map_page(pdev, bi->page,
499 bi->page_offset,
500 (PAGE_SIZE / 2),
501 PCI_DMA_FROMDEVICE);
9a799d71
AK		 502 }
503
3a581073 504 if (!bi->skb) {
74ce8dd2
JB		 505 struct sk_buff *skb = netdev_alloc_skb(adapter->netdev,
506 bufsz);
9a799d71
AK		 507
508 if (!skb) {
509 adapter->alloc_rx_buff_failed++;
510 goto no_buffers;
511 }
512
513 /*
514 * Make buffer alignment 2 beyond a 16 byte boundary
515 * this will result in a 16 byte aligned IP header after
516 * the 14 byte MAC header is removed
517 */
518 skb_reserve(skb, NET_IP_ALIGN);
519
3a581073
JB		 520 bi->skb = skb;
521 bi->dma = pci_map_single(pdev, skb->data, bufsz,
522 PCI_DMA_FROMDEVICE);
9a799d71
AK		 523 }
524 /* Refresh the desc even if buffer_addrs didn't change because
525 * each write-back erases this info. */
526 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
3a581073
JB		 527 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
528 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
9a799d71 529 } else {
3a581073 530 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
9a799d71
AK		 531 }
532
533 i++;
534 if (i == rx_ring->count)
535 i = 0;
3a581073 536 bi = &rx_ring->rx_buffer_info[i];
9a799d71 537 }
7c6e0a43 538
9a799d71
AK		 539no_buffers:
540 if (rx_ring->next_to_use != i) {
541 rx_ring->next_to_use = i;
542 if (i-- == 0)
543 i = (rx_ring->count - 1);
544
545 /*
546 * Force memory writes to complete before letting h/w
547 * know there are new descriptors to fetch. (Only
548 * applicable for weak-ordered memory model archs,
549 * such as IA-64).
550 */
551 wmb();
552 writel(i, adapter->hw.hw_addr + rx_ring->tail);
553 }
554}
555
7c6e0a43
JB		 556static inline u16 ixgbe_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
557{
558 return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
559}
560
561static inline u16 ixgbe_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
562{
563 return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
564}
565
9a799d71 566static bool ixgbe_clean_rx_irq(struct ixgbe_adapter *adapter,
b4617240
PW		 567 struct ixgbe_ring *rx_ring,
568 int *work_done, int work_to_do)
9a799d71 569{
9a799d71
AK		 570 struct pci_dev *pdev = adapter->pdev;
571 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
572 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
573 struct sk_buff *skb;
574 unsigned int i;
7c6e0a43 575 u32 len, staterr;
177db6ff
MC		 576 u16 hdr_info;
577 bool cleaned = false;
9a799d71 578 int cleaned_count = 0;
d2f4fbe2 579 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
9a799d71
AK		 580
581 i = rx_ring->next_to_clean;
9a799d71
AK		 582 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
583 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
584 rx_buffer_info = &rx_ring->rx_buffer_info[i];
9a799d71
AK		 585
586 while (staterr & IXGBE_RXD_STAT_DD) {
7c6e0a43 587 u32 upper_len = 0;
9a799d71
AK		 588 if (*work_done >= work_to_do)
589 break;
590 (*work_done)++;
591
592 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
7c6e0a43
JB		 593 hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
594 len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
762f4c57 595 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
9a799d71
AK		 596 if (hdr_info & IXGBE_RXDADV_SPH)
597 adapter->rx_hdr_split++;
598 if (len > IXGBE_RX_HDR_SIZE)
599 len = IXGBE_RX_HDR_SIZE;
600 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
7c6e0a43 601 } else {
9a799d71 602 len = le16_to_cpu(rx_desc->wb.upper.length);
7c6e0a43 603 }
9a799d71
AK		 604
605 cleaned = true;
606 skb = rx_buffer_info->skb;
607 prefetch(skb->data - NET_IP_ALIGN);
608 rx_buffer_info->skb = NULL;
609
610 if (len && !skb_shinfo(skb)->nr_frags) {
611 pci_unmap_single(pdev, rx_buffer_info->dma,
b4617240
PW		 612 rx_ring->rx_buf_len + NET_IP_ALIGN,
613 PCI_DMA_FROMDEVICE);
9a799d71
AK		 614 skb_put(skb, len);
615 }
616
617 if (upper_len) {
618 pci_unmap_page(pdev, rx_buffer_info->page_dma,
762f4c57 619 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
9a799d71
AK		 620 rx_buffer_info->page_dma = 0;
621 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
762f4c57
JB		 622 rx_buffer_info->page,
623 rx_buffer_info->page_offset,
624 upper_len);
625
626 if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
627 (page_count(rx_buffer_info->page) != 1))
628 rx_buffer_info->page = NULL;
629 else
630 get_page(rx_buffer_info->page);
9a799d71
AK		 631
632 skb->len += upper_len;
633 skb->data_len += upper_len;
634 skb->truesize += upper_len;
635 }
636
637 i++;
638 if (i == rx_ring->count)
639 i = 0;
640 next_buffer = &rx_ring->rx_buffer_info[i];
641
642 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
643 prefetch(next_rxd);
644
645 cleaned_count++;
646 if (staterr & IXGBE_RXD_STAT_EOP) {
647 rx_ring->stats.packets++;
648 rx_ring->stats.bytes += skb->len;
649 } else {
650 rx_buffer_info->skb = next_buffer->skb;
651 rx_buffer_info->dma = next_buffer->dma;
652 next_buffer->skb = skb;
762f4c57 653 next_buffer->dma = 0;
9a799d71
AK		 654 adapter->non_eop_descs++;
655 goto next_desc;
656 }
657
658 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
659 dev_kfree_skb_irq(skb);
660 goto next_desc;
661 }
662
663 ixgbe_rx_checksum(adapter, staterr, skb);
d2f4fbe2
AV		 664
665 /* probably a little skewed due to removing CRC */
666 total_rx_bytes += skb->len;
667 total_rx_packets++;
668
74ce8dd2 669 skb->protocol = eth_type_trans(skb, adapter->netdev);
177db6ff 670 ixgbe_receive_skb(adapter, skb, staterr, rx_ring, rx_desc);
9a799d71
AK		 671
672next_desc:
673 rx_desc->wb.upper.status_error = 0;
674
675 /* return some buffers to hardware, one at a time is too slow */
676 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
677 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
678 cleaned_count = 0;
679 }
680
681 /* use prefetched values */
682 rx_desc = next_rxd;
683 rx_buffer_info = next_buffer;
684
685 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
177db6ff
MC		 686 }
687
688 if (rx_ring->lro_used) {
689 lro_flush_all(&rx_ring->lro_mgr);
690 rx_ring->lro_used = false;
9a799d71
AK		 691 }
692
693 rx_ring->next_to_clean = i;
694 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
695
696 if (cleaned_count)
697 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
698
f494e8fa
AV		 699 rx_ring->total_packets += total_rx_packets;
700 rx_ring->total_bytes += total_rx_bytes;
701 adapter->net_stats.rx_bytes += total_rx_bytes;
702 adapter->net_stats.rx_packets += total_rx_packets;
703
9a799d71
AK		 704 return cleaned;
705}
706
021230d4 707static int ixgbe_clean_rxonly(struct napi_struct *, int);
9a799d71
AK		 708/**
709 * ixgbe_configure_msix - Configure MSI-X hardware
710 * @adapter: board private structure
711 *
712 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
713 * interrupts.
714 **/
715static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
716{
021230d4
AV		 717 struct ixgbe_q_vector *q_vector;
718 int i, j, q_vectors, v_idx, r_idx;
719 u32 mask;
9a799d71 720
021230d4 721 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
9a799d71 722
021230d4
AV		 723 /* Populate the IVAR table and set the ITR values to the
724 * corresponding register.
725 */
726 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
727 q_vector = &adapter->q_vector[v_idx];
728 /* XXX for_each_bit(...) */
729 r_idx = find_first_bit(q_vector->rxr_idx,
b4617240 730 adapter->num_rx_queues);
021230d4
AV		 731
732 for (i = 0; i < q_vector->rxr_count; i++) {
733 j = adapter->rx_ring[r_idx].reg_idx;
734 ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(j), v_idx);
735 r_idx = find_next_bit(q_vector->rxr_idx,
b4617240
PW		 736 adapter->num_rx_queues,
737 r_idx + 1);
021230d4
AV		 738 }
739 r_idx = find_first_bit(q_vector->txr_idx,
b4617240 740 adapter->num_tx_queues);
021230d4
AV		 741
742 for (i = 0; i < q_vector->txr_count; i++) {
743 j = adapter->tx_ring[r_idx].reg_idx;
744 ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(j), v_idx);
745 r_idx = find_next_bit(q_vector->txr_idx,
b4617240
PW		 746 adapter->num_tx_queues,
747 r_idx + 1);
021230d4
AV		 748 }
749
30efa5a3 750 /* if this is a tx only vector halve the interrupt rate */
021230d4 751 if (q_vector->txr_count && !q_vector->rxr_count)
30efa5a3 752 q_vector->eitr = (adapter->eitr_param >> 1);
021230d4 753 else
30efa5a3
JB		 754 /* rx only */
755 q_vector->eitr = adapter->eitr_param;
021230d4
AV		 756
757 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx),
b4617240 758 EITR_INTS_PER_SEC_TO_REG(q_vector->eitr));
9a799d71
AK		 759 }
760
021230d4
AV		 761 ixgbe_set_ivar(adapter, IXGBE_IVAR_OTHER_CAUSES_INDEX, v_idx);
762 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
763
41fb9248 764 /* set up to autoclear timer, and the vectors */
021230d4 765 mask = IXGBE_EIMS_ENABLE_MASK;
41fb9248 766 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
021230d4 767 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
9a799d71
AK		 768}
769
f494e8fa
AV		 770enum latency_range {
771 lowest_latency = 0,
772 low_latency = 1,
773 bulk_latency = 2,
774 latency_invalid = 255
775};
776
777/**
778 * ixgbe_update_itr - update the dynamic ITR value based on statistics
779 * @adapter: pointer to adapter
780 * @eitr: eitr setting (ints per sec) to give last timeslice
781 * @itr_setting: current throttle rate in ints/second
782 * @packets: the number of packets during this measurement interval
783 * @bytes: the number of bytes during this measurement interval
784 *
785 * Stores a new ITR value based on packets and byte
786 * counts during the last interrupt. The advantage of per interrupt
787 * computation is faster updates and more accurate ITR for the current
788 * traffic pattern. Constants in this function were computed
789 * based on theoretical maximum wire speed and thresholds were set based
790 * on testing data as well as attempting to minimize response time
791 * while increasing bulk throughput.
792 * this functionality is controlled by the InterruptThrottleRate module
793 * parameter (see ixgbe_param.c)
794 **/
795static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
b4617240
PW		 796 u32 eitr, u8 itr_setting,
797 int packets, int bytes)
f494e8fa
AV		 798{
799 unsigned int retval = itr_setting;
800 u32 timepassed_us;
801 u64 bytes_perint;
802
803 if (packets == 0)
804 goto update_itr_done;
805
806
807 /* simple throttlerate management
808 * 0-20MB/s lowest (100000 ints/s)
809 * 20-100MB/s low (20000 ints/s)
810 * 100-1249MB/s bulk (8000 ints/s)
811 */
812 /* what was last interrupt timeslice? */
813 timepassed_us = 1000000/eitr;
814 bytes_perint = bytes / timepassed_us; /* bytes/usec */
815
816 switch (itr_setting) {
817 case lowest_latency:
818 if (bytes_perint > adapter->eitr_low)
819 retval = low_latency;
820 break;
821 case low_latency:
822 if (bytes_perint > adapter->eitr_high)
823 retval = bulk_latency;
824 else if (bytes_perint <= adapter->eitr_low)
825 retval = lowest_latency;
826 break;
827 case bulk_latency:
828 if (bytes_perint <= adapter->eitr_high)
829 retval = low_latency;
830 break;
831 }
832
833update_itr_done:
834 return retval;
835}
836
837static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
838{
839 struct ixgbe_adapter *adapter = q_vector->adapter;
840 struct ixgbe_hw *hw = &adapter->hw;
841 u32 new_itr;
842 u8 current_itr, ret_itr;
843 int i, r_idx, v_idx = ((void *)q_vector - (void *)(adapter->q_vector)) /
b4617240 844 sizeof(struct ixgbe_q_vector);
f494e8fa
AV		 845 struct ixgbe_ring *rx_ring, *tx_ring;
846
847 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
848 for (i = 0; i < q_vector->txr_count; i++) {
849 tx_ring = &(adapter->tx_ring[r_idx]);
850 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
b4617240
PW		 851 q_vector->tx_itr,
852 tx_ring->total_packets,
853 tx_ring->total_bytes);
f494e8fa
AV		 854 /* if the result for this queue would decrease interrupt
855 * rate for this vector then use that result */
30efa5a3 856 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
b4617240 857 q_vector->tx_itr - 1 : ret_itr);
f494e8fa 858 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
b4617240 859 r_idx + 1);
f494e8fa
AV		 860 }
861
862 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
863 for (i = 0; i < q_vector->rxr_count; i++) {
864 rx_ring = &(adapter->rx_ring[r_idx]);
865 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
b4617240
PW		 866 q_vector->rx_itr,
867 rx_ring->total_packets,
868 rx_ring->total_bytes);
f494e8fa
AV		 869 /* if the result for this queue would decrease interrupt
870 * rate for this vector then use that result */
30efa5a3 871 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
b4617240 872 q_vector->rx_itr - 1 : ret_itr);
f494e8fa 873 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
b4617240 874 r_idx + 1);
f494e8fa
AV		 875 }
876
30efa5a3 877 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
f494e8fa
AV		 878
879 switch (current_itr) {
880 /* counts and packets in update_itr are dependent on these numbers */
881 case lowest_latency:
882 new_itr = 100000;
883 break;
884 case low_latency:
885 new_itr = 20000; /* aka hwitr = ~200 */
886 break;
887 case bulk_latency:
888 default:
889 new_itr = 8000;
890 break;
891 }
892
893 if (new_itr != q_vector->eitr) {
894 u32 itr_reg;
895 /* do an exponential smoothing */
896 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
897 q_vector->eitr = new_itr;
898 itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr);
899 /* must write high and low 16 bits to reset counter */
900 DPRINTK(TX_ERR, DEBUG, "writing eitr(%d): %08X\n", v_idx,
b4617240 901 itr_reg);
f494e8fa
AV		 902 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg | (itr_reg)<<16);
903 }
904
905 return;
906}
907
0befdb3e
JB		 908static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
909{
910 struct ixgbe_hw *hw = &adapter->hw;
911
912 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
913 (eicr & IXGBE_EICR_GPI_SDP1)) {
914 DPRINTK(PROBE, CRIT, "Fan has stopped, replace the adapter\n");
915 /* write to clear the interrupt */
916 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
917 }
918}
cf8280ee
JB		 919
920static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
921{
922 struct ixgbe_hw *hw = &adapter->hw;
923
924 adapter->lsc_int++;
925 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
926 adapter->link_check_timeout = jiffies;
927 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
928 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
929 schedule_work(&adapter->watchdog_task);
930 }
931}
932
9a799d71
AK		 933static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
934{
935 struct net_device *netdev = data;
936 struct ixgbe_adapter *adapter = netdev_priv(netdev);
937 struct ixgbe_hw *hw = &adapter->hw;
938 u32 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
939
cf8280ee
JB		 940 if (eicr & IXGBE_EICR_LSC)
941 ixgbe_check_lsc(adapter);
d4f80882 942
0befdb3e
JB		 943 ixgbe_check_fan_failure(adapter, eicr);
944
d4f80882
AV		 945 if (!test_bit(__IXGBE_DOWN, &adapter->state))
946 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
9a799d71
AK		 947
948 return IRQ_HANDLED;
949}
950
951static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
952{
021230d4
AV		 953 struct ixgbe_q_vector *q_vector = data;
954 struct ixgbe_adapter *adapter = q_vector->adapter;
3a581073 955 struct ixgbe_ring *tx_ring;
021230d4
AV		 956 int i, r_idx;
957
958 if (!q_vector->txr_count)
959 return IRQ_HANDLED;
960
961 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
962 for (i = 0; i < q_vector->txr_count; i++) {
3a581073 963 tx_ring = &(adapter->tx_ring[r_idx]);
5dd2d332 964#ifdef CONFIG_IXGBE_DCA
bd0362dd 965 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
3a581073 966 ixgbe_update_tx_dca(adapter, tx_ring);
bd0362dd 967#endif
3a581073
JB		 968 tx_ring->total_bytes = 0;
969 tx_ring->total_packets = 0;
970 ixgbe_clean_tx_irq(adapter, tx_ring);
021230d4 971 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
b4617240 972 r_idx + 1);
021230d4 973 }
9a799d71 974
9a799d71
AK		 975 return IRQ_HANDLED;
976}
977
021230d4
AV		 978/**
979 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
980 * @irq: unused
981 * @data: pointer to our q_vector struct for this interrupt vector
982 **/
9a799d71
AK		 983static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
984{
021230d4
AV		 985 struct ixgbe_q_vector *q_vector = data;
986 struct ixgbe_adapter *adapter = q_vector->adapter;
3a581073 987 struct ixgbe_ring *rx_ring;
021230d4 988 int r_idx;
30efa5a3 989 int i;
021230d4
AV		 990
991 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
30efa5a3
JB		 992 for (i = 0; i < q_vector->rxr_count; i++) {
993 rx_ring = &(adapter->rx_ring[r_idx]);
994 rx_ring->total_bytes = 0;
995 rx_ring->total_packets = 0;
996 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
997 r_idx + 1);
998 }
999
021230d4
AV		 1000 if (!q_vector->rxr_count)
1001 return IRQ_HANDLED;
1002
30efa5a3 1003 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
3a581073 1004 rx_ring = &(adapter->rx_ring[r_idx]);
021230d4 1005 /* disable interrupts on this vector only */
3a581073 1006 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, rx_ring->v_idx);
021230d4
AV		 1007 netif_rx_schedule(adapter->netdev, &q_vector->napi);
1008
1009 return IRQ_HANDLED;
1010}
1011
1012static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1013{
1014 ixgbe_msix_clean_rx(irq, data);
1015 ixgbe_msix_clean_tx(irq, data);
9a799d71 1016
9a799d71
AK		 1017 return IRQ_HANDLED;
1018}
1019
021230d4
AV		 1020/**
1021 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1022 * @napi: napi struct with our devices info in it
1023 * @budget: amount of work driver is allowed to do this pass, in packets
1024 *
f0848276
JB		 1025 * This function is optimized for cleaning one queue only on a single
1026 * q_vector!!!
021230d4 1027 **/
9a799d71
AK		 1028static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1029{
021230d4 1030 struct ixgbe_q_vector *q_vector =
b4617240 1031 container_of(napi, struct ixgbe_q_vector, napi);
021230d4 1032 struct ixgbe_adapter *adapter = q_vector->adapter;
f0848276 1033 struct ixgbe_ring *rx_ring = NULL;
9a799d71 1034 int work_done = 0;
021230d4 1035 long r_idx;
9a799d71 1036
021230d4 1037 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
3a581073 1038 rx_ring = &(adapter->rx_ring[r_idx]);
5dd2d332 1039#ifdef CONFIG_IXGBE_DCA
bd0362dd 1040 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
3a581073 1041 ixgbe_update_rx_dca(adapter, rx_ring);
bd0362dd 1042#endif
9a799d71 1043
3a581073 1044 ixgbe_clean_rx_irq(adapter, rx_ring, &work_done, budget);
9a799d71 1045
021230d4
AV		 1046 /* If all Rx work done, exit the polling mode */
1047 if (work_done < budget) {
1048 netif_rx_complete(adapter->netdev, napi);
30efa5a3 1049 if (adapter->itr_setting & 3)
f494e8fa 1050 ixgbe_set_itr_msix(q_vector);
9a799d71 1051 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3a581073 1052 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, rx_ring->v_idx);
9a799d71
AK		 1053 }
1054
1055 return work_done;
1056}
1057
f0848276
JB		 1058/**
1059 * ixgbe_clean_rxonly_many - msix (aka one shot) rx clean routine
1060 * @napi: napi struct with our devices info in it
1061 * @budget: amount of work driver is allowed to do this pass, in packets
1062 *
1063 * This function will clean more than one rx queue associated with a
1064 * q_vector.
1065 **/
1066static int ixgbe_clean_rxonly_many(struct napi_struct *napi, int budget)
1067{
1068 struct ixgbe_q_vector *q_vector =
1069 container_of(napi, struct ixgbe_q_vector, napi);
1070 struct ixgbe_adapter *adapter = q_vector->adapter;
f0848276
JB		 1071 struct ixgbe_ring *rx_ring = NULL;
1072 int work_done = 0, i;
1073 long r_idx;
1074 u16 enable_mask = 0;
1075
1076 /* attempt to distribute budget to each queue fairly, but don't allow
1077 * the budget to go below 1 because we'll exit polling */
1078 budget /= (q_vector->rxr_count ?: 1);
1079 budget = max(budget, 1);
1080 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1081 for (i = 0; i < q_vector->rxr_count; i++) {
1082 rx_ring = &(adapter->rx_ring[r_idx]);
5dd2d332 1083#ifdef CONFIG_IXGBE_DCA
f0848276
JB		 1084 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1085 ixgbe_update_rx_dca(adapter, rx_ring);
1086#endif
1087 ixgbe_clean_rx_irq(adapter, rx_ring, &work_done, budget);
1088 enable_mask |= rx_ring->v_idx;
1089 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1090 r_idx + 1);
1091 }
1092
1093 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1094 rx_ring = &(adapter->rx_ring[r_idx]);
1095 /* If all Rx work done, exit the polling mode */
7f821875 1096 if (work_done < budget) {
74ce8dd2 1097 netif_rx_complete(adapter->netdev, napi);
f0848276
JB		 1098 if (adapter->itr_setting & 3)
1099 ixgbe_set_itr_msix(q_vector);
1100 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1101 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, enable_mask);
1102 return 0;
1103 }
1104
1105 return work_done;
1106}
021230d4 1107static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
b4617240 1108 int r_idx)
021230d4
AV		 1109{
1110 a->q_vector[v_idx].adapter = a;
1111 set_bit(r_idx, a->q_vector[v_idx].rxr_idx);
1112 a->q_vector[v_idx].rxr_count++;
1113 a->rx_ring[r_idx].v_idx = 1 << v_idx;
1114}
1115
1116static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
b4617240 1117 int r_idx)
021230d4
AV		 1118{
1119 a->q_vector[v_idx].adapter = a;
1120 set_bit(r_idx, a->q_vector[v_idx].txr_idx);
1121 a->q_vector[v_idx].txr_count++;
1122 a->tx_ring[r_idx].v_idx = 1 << v_idx;
1123}
1124
9a799d71 1125/**
021230d4
AV		 1126 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
1127 * @adapter: board private structure to initialize
1128 * @vectors: allotted vector count for descriptor rings
9a799d71 1129 *
021230d4
AV		 1130 * This function maps descriptor rings to the queue-specific vectors
1131 * we were allotted through the MSI-X enabling code. Ideally, we'd have
1132 * one vector per ring/queue, but on a constrained vector budget, we
1133 * group the rings as "efficiently" as possible. You would add new
1134 * mapping configurations in here.
9a799d71 1135 **/
021230d4 1136static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
b4617240 1137 int vectors)
021230d4
AV		 1138{
1139 int v_start = 0;
1140 int rxr_idx = 0, txr_idx = 0;
1141 int rxr_remaining = adapter->num_rx_queues;
1142 int txr_remaining = adapter->num_tx_queues;
1143 int i, j;
1144 int rqpv, tqpv;
1145 int err = 0;
1146
1147 /* No mapping required if MSI-X is disabled. */
1148 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1149 goto out;
9a799d71 1150
021230d4
AV		 1151 /*
1152 * The ideal configuration...
1153 * We have enough vectors to map one per queue.
1154 */
1155 if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1156 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1157 map_vector_to_rxq(adapter, v_start, rxr_idx);
9a799d71 1158
021230d4
AV		 1159 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1160 map_vector_to_txq(adapter, v_start, txr_idx);
9a799d71 1161
9a799d71 1162 goto out;
021230d4 1163 }
9a799d71 1164
021230d4
AV		 1165 /*
1166 * If we don't have enough vectors for a 1-to-1
1167 * mapping, we'll have to group them so there are
1168 * multiple queues per vector.
1169 */
1170 /* Re-adjusting *qpv takes care of the remainder. */
1171 for (i = v_start; i < vectors; i++) {
1172 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
1173 for (j = 0; j < rqpv; j++) {
1174 map_vector_to_rxq(adapter, i, rxr_idx);
1175 rxr_idx++;
1176 rxr_remaining--;
1177 }
1178 }
1179 for (i = v_start; i < vectors; i++) {
1180 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
1181 for (j = 0; j < tqpv; j++) {
1182 map_vector_to_txq(adapter, i, txr_idx);
1183 txr_idx++;
1184 txr_remaining--;
9a799d71 1185 }
9a799d71
AK		 1186 }
1187
021230d4
AV		 1188out:
1189 return err;
1190}
1191
1192/**
1193 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
1194 * @adapter: board private structure
1195 *
1196 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
1197 * interrupts from the kernel.
1198 **/
1199static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
1200{
1201 struct net_device *netdev = adapter->netdev;
1202 irqreturn_t (*handler)(int, void *);
1203 int i, vector, q_vectors, err;
1204
1205 /* Decrement for Other and TCP Timer vectors */
1206 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1207
1208 /* Map the Tx/Rx rings to the vectors we were allotted. */
1209 err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
1210 if (err)
1211 goto out;
1212
1213#define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
b4617240
PW		 1214 (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
1215 &ixgbe_msix_clean_many)
021230d4
AV		 1216 for (vector = 0; vector < q_vectors; vector++) {
1217 handler = SET_HANDLER(&adapter->q_vector[vector]);
1218 sprintf(adapter->name[vector], "%s:v%d-%s",
b4617240
PW		 1219 netdev->name, vector,
1220 (handler == &ixgbe_msix_clean_rx) ? "Rx" :
1221 ((handler == &ixgbe_msix_clean_tx) ? "Tx" : "TxRx"));
021230d4 1222 err = request_irq(adapter->msix_entries[vector].vector,
b4617240
PW		 1223 handler, 0, adapter->name[vector],
1224 &(adapter->q_vector[vector]));
9a799d71
AK		 1225 if (err) {
1226 DPRINTK(PROBE, ERR,
b4617240
PW		 1227 "request_irq failed for MSIX interrupt "
1228 "Error: %d\n", err);
021230d4 1229 goto free_queue_irqs;
9a799d71 1230 }
9a799d71
AK		 1231 }
1232
021230d4
AV		 1233 sprintf(adapter->name[vector], "%s:lsc", netdev->name);
1234 err = request_irq(adapter->msix_entries[vector].vector,
b4617240 1235 &ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
9a799d71
AK		 1236 if (err) {
1237 DPRINTK(PROBE, ERR,
1238 "request_irq for msix_lsc failed: %d\n", err);
021230d4 1239 goto free_queue_irqs;
9a799d71
AK		 1240 }
1241
9a799d71
AK		 1242 return 0;
1243
021230d4
AV		 1244free_queue_irqs:
1245 for (i = vector - 1; i >= 0; i--)
1246 free_irq(adapter->msix_entries[--vector].vector,
b4617240 1247 &(adapter->q_vector[i]));
021230d4
AV		 1248 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
1249 pci_disable_msix(adapter->pdev);
9a799d71
AK		 1250 kfree(adapter->msix_entries);
1251 adapter->msix_entries = NULL;
021230d4 1252out:
9a799d71
AK		 1253 return err;
1254}
1255
f494e8fa
AV		 1256static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
1257{
1258 struct ixgbe_hw *hw = &adapter->hw;
1259 struct ixgbe_q_vector *q_vector = adapter->q_vector;
1260 u8 current_itr;
1261 u32 new_itr = q_vector->eitr;
1262 struct ixgbe_ring *rx_ring = &adapter->rx_ring[0];
1263 struct ixgbe_ring *tx_ring = &adapter->tx_ring[0];
1264
30efa5a3 1265 q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
b4617240
PW		 1266 q_vector->tx_itr,
1267 tx_ring->total_packets,
1268 tx_ring->total_bytes);
30efa5a3 1269 q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
b4617240
PW		 1270 q_vector->rx_itr,
1271 rx_ring->total_packets,
1272 rx_ring->total_bytes);
f494e8fa 1273
30efa5a3 1274 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
f494e8fa
AV		 1275
1276 switch (current_itr) {
1277 /* counts and packets in update_itr are dependent on these numbers */
1278 case lowest_latency:
1279 new_itr = 100000;
1280 break;
1281 case low_latency:
1282 new_itr = 20000; /* aka hwitr = ~200 */
1283 break;
1284 case bulk_latency:
1285 new_itr = 8000;
1286 break;
1287 default:
1288 break;
1289 }
1290
1291 if (new_itr != q_vector->eitr) {
1292 u32 itr_reg;
1293 /* do an exponential smoothing */
1294 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1295 q_vector->eitr = new_itr;
1296 itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr);
1297 /* must write high and low 16 bits to reset counter */
1298 IXGBE_WRITE_REG(hw, IXGBE_EITR(0), itr_reg | (itr_reg)<<16);
1299 }
1300
1301 return;
1302}
1303
021230d4
AV		 1304static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter);
1305
9a799d71 1306/**
021230d4 1307 * ixgbe_intr - legacy mode Interrupt Handler
9a799d71
AK		 1308 * @irq: interrupt number
1309 * @data: pointer to a network interface device structure
1310 * @pt_regs: CPU registers structure
1311 **/
1312static irqreturn_t ixgbe_intr(int irq, void *data)
1313{
1314 struct net_device *netdev = data;
1315 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1316 struct ixgbe_hw *hw = &adapter->hw;
1317 u32 eicr;
1318
021230d4
AV		 1319 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
1320 * therefore no explict interrupt disable is necessary */
1321 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
f47cf66e
JB		 1322 if (!eicr) {
1323 /* shared interrupt alert!
1324 * make sure interrupts are enabled because the read will
1325 * have disabled interrupts due to EIAM */
1326 ixgbe_irq_enable(adapter);
9a799d71 1327 return IRQ_NONE; /* Not our interrupt */
f47cf66e 1328 }
9a799d71 1329
cf8280ee
JB		 1330 if (eicr & IXGBE_EICR_LSC)
1331 ixgbe_check_lsc(adapter);
021230d4 1332
0befdb3e
JB		 1333 ixgbe_check_fan_failure(adapter, eicr);
1334
021230d4 1335 if (netif_rx_schedule_prep(netdev, &adapter->q_vector[0].napi)) {
f494e8fa
AV		 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;
021230d4
AV		 1340 /* would disable interrupts here but EIAM disabled it */
1341 __netif_rx_schedule(netdev, &adapter->q_vector[0].napi);
9a799d71
AK		 1342 }
1343
1344 return IRQ_HANDLED;
1345}
1346
021230d4
AV		 1347static 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
9a799d71
AK		 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 **/
021230d4 1367static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
9a799d71
AK		 1368{
1369 struct net_device *netdev = adapter->netdev;
021230d4 1370 int err;
9a799d71 1371
021230d4
AV		 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,
b4617240 1376 netdev->name, netdev);
021230d4
AV		 1377 } else {
1378 err = request_irq(adapter->pdev->irq, &ixgbe_intr, IRQF_SHARED,
b4617240 1379 netdev->name, netdev);
9a799d71
AK		 1380 }
1381
9a799d71
AK		 1382 if (err)
1383 DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err);
1384
9a799d71
AK		 1385 return err;
1386}
1387
1388static 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) {
021230d4 1393 int i, q_vectors;
9a799d71 1394
021230d4
AV		 1395 q_vectors = adapter->num_msix_vectors;
1396
1397 i = q_vectors - 1;
9a799d71 1398 free_irq(adapter->msix_entries[i].vector, netdev);
9a799d71 1399
021230d4
AV		 1400 i--;
1401 for (; i >= 0; i--) {
1402 free_irq(adapter->msix_entries[i].vector,
b4617240 1403 &(adapter->q_vector[i]));
021230d4
AV		 1404 }
1405
1406 ixgbe_reset_q_vectors(adapter);
1407 } else {
1408 free_irq(adapter->pdev->irq, netdev);
9a799d71
AK		 1409 }
1410}
1411
1412/**
1413 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
1414 * @adapter: board private structure
1415 **/
1416static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
1417{
9a799d71
AK		 1418 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
1419 IXGBE_WRITE_FLUSH(&adapter->hw);
021230d4
AV		 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 }
9a799d71
AK		 1427}
1428
1429/**
1430 * ixgbe_irq_enable - Enable default interrupt generation settings
1431 * @adapter: board private structure
1432 **/
1433static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
1434{
021230d4
AV		 1435 u32 mask;
1436 mask = IXGBE_EIMS_ENABLE_MASK;
0befdb3e
JB		 1437 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
1438 mask |= IXGBE_EIMS_GPI_SDP1;
021230d4 1439 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
d4f80882 1440 IXGBE_WRITE_FLUSH(&adapter->hw);
9a799d71
AK		 1441}
1442
1443/**
1444 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
1445 *
1446 **/
1447static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
1448{
9a799d71
AK		 1449 struct ixgbe_hw *hw = &adapter->hw;
1450
021230d4 1451 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
30efa5a3 1452 EITR_INTS_PER_SEC_TO_REG(adapter->eitr_param));
9a799d71
AK		 1453
1454 ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(0), 0);
021230d4
AV		 1455 ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(0), 0);
1456
1457 map_vector_to_rxq(adapter, 0, 0);
1458 map_vector_to_txq(adapter, 0, 0);
1459
1460 DPRINTK(HW, INFO, "Legacy interrupt IVAR setup done\n");
9a799d71
AK		 1461}
1462
1463/**
3a581073 1464 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
9a799d71
AK		 1465 * @adapter: board private structure
1466 *
1467 * Configure the Tx unit of the MAC after a reset.
1468 **/
1469static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
1470{
e01c31a5 1471 u64 tdba, tdwba;
9a799d71 1472 struct ixgbe_hw *hw = &adapter->hw;
021230d4 1473 u32 i, j, tdlen, txctrl;
9a799d71
AK		 1474
1475 /* Setup the HW Tx Head and Tail descriptor pointers */
1476 for (i = 0; i < adapter->num_tx_queues; i++) {
e01c31a5
JB		 1477 struct ixgbe_ring *ring = &adapter->tx_ring[i];
1478 j = ring->reg_idx;
1479 tdba = ring->dma;
1480 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
021230d4 1481 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(j),
e01c31a5 1482 (tdba & DMA_32BIT_MASK));
021230d4 1483 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(j), (tdba >> 32));
e01c31a5
JB		 1484 tdwba = ring->dma +
1485 (ring->count * sizeof(union ixgbe_adv_tx_desc));
1486 tdwba |= IXGBE_TDWBAL_HEAD_WB_ENABLE;
1487 IXGBE_WRITE_REG(hw, IXGBE_TDWBAL(j), tdwba & DMA_32BIT_MASK);
1488 IXGBE_WRITE_REG(hw, IXGBE_TDWBAH(j), (tdwba >> 32));
021230d4
AV		 1489 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(j), tdlen);
1490 IXGBE_WRITE_REG(hw, IXGBE_TDH(j), 0);
1491 IXGBE_WRITE_REG(hw, IXGBE_TDT(j), 0);
1492 adapter->tx_ring[i].head = IXGBE_TDH(j);
1493 adapter->tx_ring[i].tail = IXGBE_TDT(j);
1494 /* Disable Tx Head Writeback RO bit, since this hoses
1495 * bookkeeping if things aren't delivered in order.
1496 */
e01c31a5 1497 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(j));
021230d4 1498 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
e01c31a5 1499 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(j), txctrl);
9a799d71 1500 }
9a799d71
AK		 1501}
1502
cc41ac7c
JB		 1503#define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1504
1505static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter, int index)
1506{
1507 struct ixgbe_ring *rx_ring;
1508 u32 srrctl;
1509 int queue0;
3be1adfb
AD		 1510 unsigned long mask;
1511
1512 /* program one srrctl register per VMDq index */
1513 if (adapter->flags & IXGBE_FLAG_VMDQ_ENABLED) {
1514 long shift, len;
1515 mask = (unsigned long) adapter->ring_feature[RING_F_RSS].mask;
1516 len = sizeof(adapter->ring_feature[RING_F_VMDQ].mask) * 8;
1517 shift = find_first_bit(&mask, len);
1518 queue0 = index & mask;
1519 index = (index & mask) >> shift;
1520 /* program one srrctl per RSS queue since RDRXCTL.MVMEN is enabled */
cc41ac7c 1521 } else {
3be1adfb
AD		 1522 mask = (unsigned long) adapter->ring_feature[RING_F_RSS].mask;
1523 queue0 = index & mask;
1524 index = index & mask;
cc41ac7c 1525 }
3be1adfb 1526
cc41ac7c
JB		 1527 rx_ring = &adapter->rx_ring[queue0];
1528
1529 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
1530
1531 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
1532 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
1533
1534 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1535 srrctl |= IXGBE_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1536 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1537 srrctl |= ((IXGBE_RX_HDR_SIZE <<
b4617240
PW		 1538 IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
1539 IXGBE_SRRCTL_BSIZEHDR_MASK);
cc41ac7c
JB		 1540 } else {
1541 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1542
1543 if (rx_ring->rx_buf_len == MAXIMUM_ETHERNET_VLAN_SIZE)
1544 srrctl |= IXGBE_RXBUFFER_2048 >>
1545 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1546 else
1547 srrctl |= rx_ring->rx_buf_len >>
1548 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1549 }
1550 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
1551}
9a799d71 1552
177db6ff
MC		 1553/**
1554 * ixgbe_get_skb_hdr - helper function for LRO header processing
1555 * @skb: pointer to sk_buff to be added to LRO packet
b4617240 1556 * @iphdr: pointer to ip header structure
177db6ff
MC		 1557 * @tcph: pointer to tcp header structure
1558 * @hdr_flags: pointer to header flags
1559 * @priv: private data
1560 **/
1561static int ixgbe_get_skb_hdr(struct sk_buff *skb, void **iphdr, void **tcph,
1562 u64 *hdr_flags, void *priv)
1563{
1564 union ixgbe_adv_rx_desc *rx_desc = priv;
1565
1566 /* Verify that this is a valid IPv4 TCP packet */
e9990a9c
JB		 1567 if (!((ixgbe_get_pkt_info(rx_desc) & IXGBE_RXDADV_PKTTYPE_IPV4) &&
1568 (ixgbe_get_pkt_info(rx_desc) & IXGBE_RXDADV_PKTTYPE_TCP)))
177db6ff
MC		 1569 return -1;
1570
1571 /* Set network headers */
1572 skb_reset_network_header(skb);
1573 skb_set_transport_header(skb, ip_hdrlen(skb));
1574 *iphdr = ip_hdr(skb);
1575 *tcph = tcp_hdr(skb);
1576 *hdr_flags = LRO_IPV4 | LRO_TCP;
1577 return 0;
1578}
1579
cc41ac7c 1580#define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
b4617240 1581 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
cc41ac7c 1582
9a799d71 1583/**
3a581073 1584 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
9a799d71
AK		 1585 * @adapter: board private structure
1586 *
1587 * Configure the Rx unit of the MAC after a reset.
1588 **/
1589static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
1590{
1591 u64 rdba;
1592 struct ixgbe_hw *hw = &adapter->hw;
1593 struct net_device *netdev = adapter->netdev;
1594 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
021230d4 1595 int i, j;
9a799d71 1596 u32 rdlen, rxctrl, rxcsum;
7c6e0a43
JB		 1597 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
1598 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
1599 0x6A3E67EA, 0x14364D17, 0x3BED200D};
9a799d71 1600 u32 fctrl, hlreg0;
9a799d71 1601 u32 pages;
cc41ac7c
JB		 1602 u32 reta = 0, mrqc;
1603 u32 rdrxctl;
7c6e0a43 1604 int rx_buf_len;
9a799d71
AK		 1605
1606 /* Decide whether to use packet split mode or not */
762f4c57 1607 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
9a799d71
AK		 1608
1609 /* Set the RX buffer length according to the mode */
1610 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
7c6e0a43 1611 rx_buf_len = IXGBE_RX_HDR_SIZE;
9a799d71
AK		 1612 } else {
1613 if (netdev->mtu <= ETH_DATA_LEN)
7c6e0a43 1614 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
9a799d71 1615 else
7c6e0a43 1616 rx_buf_len = ALIGN(max_frame, 1024);
9a799d71
AK		 1617 }
1618
1619 fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
1620 fctrl |= IXGBE_FCTRL_BAM;
021230d4 1621 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
9a799d71
AK		 1622 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
1623
1624 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
1625 if (adapter->netdev->mtu <= ETH_DATA_LEN)
1626 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
1627 else
1628 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
1629 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
1630
1631 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1632
9a799d71
AK		 1633 rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
1634 /* disable receives while setting up the descriptors */
1635 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1636 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
1637
1638 /* Setup the HW Rx Head and Tail Descriptor Pointers and
1639 * the Base and Length of the Rx Descriptor Ring */
1640 for (i = 0; i < adapter->num_rx_queues; i++) {
1641 rdba = adapter->rx_ring[i].dma;
7c6e0a43
JB		 1642 j = adapter->rx_ring[i].reg_idx;
1643 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(j), (rdba & DMA_32BIT_MASK));
1644 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(j), (rdba >> 32));
1645 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(j), rdlen);
1646 IXGBE_WRITE_REG(hw, IXGBE_RDH(j), 0);
1647 IXGBE_WRITE_REG(hw, IXGBE_RDT(j), 0);
1648 adapter->rx_ring[i].head = IXGBE_RDH(j);
1649 adapter->rx_ring[i].tail = IXGBE_RDT(j);
1650 adapter->rx_ring[i].rx_buf_len = rx_buf_len;
e9990a9c
JB		 1651 /* Intitial LRO Settings */
1652 adapter->rx_ring[i].lro_mgr.max_aggr = IXGBE_MAX_LRO_AGGREGATE;
1653 adapter->rx_ring[i].lro_mgr.max_desc = IXGBE_MAX_LRO_DESCRIPTORS;
1654 adapter->rx_ring[i].lro_mgr.get_skb_header = ixgbe_get_skb_hdr;
1655 adapter->rx_ring[i].lro_mgr.features = LRO_F_EXTRACT_VLAN_ID;
1656 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
1657 adapter->rx_ring[i].lro_mgr.features |= LRO_F_NAPI;
1658 adapter->rx_ring[i].lro_mgr.dev = adapter->netdev;
1659 adapter->rx_ring[i].lro_mgr.ip_summed = CHECKSUM_UNNECESSARY;
1660 adapter->rx_ring[i].lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
cc41ac7c
JB		 1661
1662 ixgbe_configure_srrctl(adapter, j);
9a799d71
AK		 1663 }
1664
cc41ac7c
JB		 1665 /*
1666 * For VMDq support of different descriptor types or
1667 * buffer sizes through the use of multiple SRRCTL
1668 * registers, RDRXCTL.MVMEN must be set to 1
1669 *
1670 * also, the manual doesn't mention it clearly but DCA hints
1671 * will only use queue 0's tags unless this bit is set. Side
1672 * effects of setting this bit are only that SRRCTL must be
1673 * fully programmed [0..15]
1674 */
1675 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
1676 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
1677 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
1678
177db6ff 1679
021230d4 1680 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
9a799d71 1681 /* Fill out redirection table */
021230d4
AV		 1682 for (i = 0, j = 0; i < 128; i++, j++) {
1683 if (j == adapter->ring_feature[RING_F_RSS].indices)
1684 j = 0;
1685 /* reta = 4-byte sliding window of
1686 * 0x00..(indices-1)(indices-1)00..etc. */
1687 reta = (reta << 8) | (j * 0x11);
1688 if ((i & 3) == 3)
1689 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
9a799d71
AK		 1690 }
1691
1692 /* Fill out hash function seeds */
1693 for (i = 0; i < 10; i++)
7c6e0a43 1694 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
9a799d71
AK		 1695
1696 mrqc = IXGBE_MRQC_RSSEN
1697 /* Perform hash on these packet types */
7c6e0a43
JB		 1698 | IXGBE_MRQC_RSS_FIELD_IPV4
1699 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
1700 | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
1701 | IXGBE_MRQC_RSS_FIELD_IPV6_EX_TCP
1702 | IXGBE_MRQC_RSS_FIELD_IPV6_EX
1703 | IXGBE_MRQC_RSS_FIELD_IPV6
1704 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
1705 | IXGBE_MRQC_RSS_FIELD_IPV6_UDP
1706 | IXGBE_MRQC_RSS_FIELD_IPV6_EX_UDP;
9a799d71 1707 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
021230d4 1708 }
9a799d71 1709
021230d4
AV		 1710 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
1711
1712 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED ||
1713 adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
1714 /* Disable indicating checksum in descriptor, enables
1715 * RSS hash */
9a799d71 1716 rxcsum |= IXGBE_RXCSUM_PCSD;
9a799d71 1717 }
021230d4
AV		 1718 if (!(rxcsum & IXGBE_RXCSUM_PCSD)) {
1719 /* Enable IPv4 payload checksum for UDP fragments
1720 * if PCSD is not set */
1721 rxcsum |= IXGBE_RXCSUM_IPPCSE;
1722 }
1723
1724 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
9a799d71
AK		 1725}
1726
1727static void ixgbe_vlan_rx_register(struct net_device *netdev,
b4617240 1728 struct vlan_group *grp)
9a799d71
AK		 1729{
1730 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1731 u32 ctrl;
1732
d4f80882
AV		 1733 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1734 ixgbe_irq_disable(adapter);
9a799d71
AK		 1735 adapter->vlgrp = grp;
1736
1737 if (grp) {
1738 /* enable VLAN tag insert/strip */
1739 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
746b9f02 1740 ctrl |= IXGBE_VLNCTRL_VME;
9a799d71
AK		 1741 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
1742 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
1743 }
1744
d4f80882
AV		 1745 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1746 ixgbe_irq_enable(adapter);
9a799d71
AK		 1747}
1748
1749static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1750{
1751 struct ixgbe_adapter *adapter = netdev_priv(netdev);
c44ade9e 1752 struct ixgbe_hw *hw = &adapter->hw;
9a799d71
AK		 1753
1754 /* add VID to filter table */
c44ade9e 1755 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, true);
9a799d71
AK		 1756}
1757
1758static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1759{
1760 struct ixgbe_adapter *adapter = netdev_priv(netdev);
c44ade9e 1761 struct ixgbe_hw *hw = &adapter->hw;
9a799d71 1762
d4f80882
AV		 1763 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1764 ixgbe_irq_disable(adapter);
1765
9a799d71 1766 vlan_group_set_device(adapter->vlgrp, vid, NULL);
d4f80882
AV		 1767
1768 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1769 ixgbe_irq_enable(adapter);
9a799d71
AK		 1770
1771 /* remove VID from filter table */
c44ade9e 1772 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, false);
9a799d71
AK		 1773}
1774
1775static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
1776{
1777 ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
1778
1779 if (adapter->vlgrp) {
1780 u16 vid;
1781 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
1782 if (!vlan_group_get_device(adapter->vlgrp, vid))
1783 continue;
1784 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
1785 }
1786 }
1787}
1788
2c5645cf
CL		 1789static u8 *ixgbe_addr_list_itr(struct ixgbe_hw *hw, u8 **mc_addr_ptr, u32 *vmdq)
1790{
1791 struct dev_mc_list *mc_ptr;
1792 u8 *addr = *mc_addr_ptr;
1793 *vmdq = 0;
1794
1795 mc_ptr = container_of(addr, struct dev_mc_list, dmi_addr[0]);
1796 if (mc_ptr->next)
1797 *mc_addr_ptr = mc_ptr->next->dmi_addr;
1798 else
1799 *mc_addr_ptr = NULL;
1800
1801 return addr;
1802}
1803
9a799d71 1804/**
2c5645cf 1805 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
9a799d71
AK		 1806 * @netdev: network interface device structure
1807 *
2c5645cf
CL		 1808 * The set_rx_method entry point is called whenever the unicast/multicast
1809 * address list or the network interface flags are updated. This routine is
1810 * responsible for configuring the hardware for proper unicast, multicast and
1811 * promiscuous mode.
9a799d71 1812 **/
2c5645cf 1813static void ixgbe_set_rx_mode(struct net_device *netdev)
9a799d71
AK		 1814{
1815 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1816 struct ixgbe_hw *hw = &adapter->hw;
3d01625a 1817 u32 fctrl, vlnctrl;
2c5645cf
CL		 1818 u8 *addr_list = NULL;
1819 int addr_count = 0;
9a799d71
AK		 1820
1821 /* Check for Promiscuous and All Multicast modes */
1822
1823 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3d01625a 1824 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
9a799d71
AK		 1825
1826 if (netdev->flags & IFF_PROMISC) {
2c5645cf 1827 hw->addr_ctrl.user_set_promisc = 1;
9a799d71 1828 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3d01625a 1829 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
9a799d71 1830 } else {
746b9f02
PM		 1831 if (netdev->flags & IFF_ALLMULTI) {
1832 fctrl |= IXGBE_FCTRL_MPE;
1833 fctrl &= ~IXGBE_FCTRL_UPE;
1834 } else {
1835 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
1836 }
3d01625a 1837 vlnctrl |= IXGBE_VLNCTRL_VFE;
2c5645cf 1838 hw->addr_ctrl.user_set_promisc = 0;
9a799d71
AK		 1839 }
1840
1841 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
3d01625a 1842 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
9a799d71 1843
2c5645cf
CL		 1844 /* reprogram secondary unicast list */
1845 addr_count = netdev->uc_count;
1846 if (addr_count)
1847 addr_list = netdev->uc_list->dmi_addr;
c44ade9e
JB		 1848 hw->mac.ops.update_uc_addr_list(hw, addr_list, addr_count,
1849 ixgbe_addr_list_itr);
9a799d71 1850
2c5645cf
CL		 1851 /* reprogram multicast list */
1852 addr_count = netdev->mc_count;
1853 if (addr_count)
1854 addr_list = netdev->mc_list->dmi_addr;
c44ade9e
JB		 1855 hw->mac.ops.update_mc_addr_list(hw, addr_list, addr_count,
1856 ixgbe_addr_list_itr);
9a799d71
AK		 1857}
1858
021230d4
AV		 1859static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
1860{
1861 int q_idx;
1862 struct ixgbe_q_vector *q_vector;
1863 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1864
1865 /* legacy and MSI only use one vector */
1866 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1867 q_vectors = 1;
1868
1869 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
f0848276 1870 struct napi_struct *napi;
021230d4
AV		 1871 q_vector = &adapter->q_vector[q_idx];
1872 if (!q_vector->rxr_count)
1873 continue;
f0848276
JB		 1874 napi = &q_vector->napi;
1875 if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) &&
1876 (q_vector->rxr_count > 1))
1877 napi->poll = &ixgbe_clean_rxonly_many;
1878
1879 napi_enable(napi);
021230d4
AV		 1880 }
1881}
1882
1883static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
1884{
1885 int q_idx;
1886 struct ixgbe_q_vector *q_vector;
1887 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1888
1889 /* legacy and MSI only use one vector */
1890 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1891 q_vectors = 1;
1892
1893 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1894 q_vector = &adapter->q_vector[q_idx];
1895 if (!q_vector->rxr_count)
1896 continue;
1897 napi_disable(&q_vector->napi);
1898 }
1899}
1900
9a799d71
AK		 1901static void ixgbe_configure(struct ixgbe_adapter *adapter)
1902{
1903 struct net_device *netdev = adapter->netdev;
1904 int i;
1905
2c5645cf 1906 ixgbe_set_rx_mode(netdev);
9a799d71
AK		 1907
1908 ixgbe_restore_vlan(adapter);
1909
1910 ixgbe_configure_tx(adapter);
1911 ixgbe_configure_rx(adapter);
1912 for (i = 0; i < adapter->num_rx_queues; i++)
1913 ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i],
b4617240 1914 (adapter->rx_ring[i].count - 1));
9a799d71
AK		 1915}
1916
1917static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
1918{
1919 struct net_device *netdev = adapter->netdev;
9a799d71 1920 struct ixgbe_hw *hw = &adapter->hw;
021230d4 1921 int i, j = 0;
9a799d71 1922 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
021230d4
AV		 1923 u32 txdctl, rxdctl, mhadd;
1924 u32 gpie;
9a799d71 1925
5eba3699
AV		 1926 ixgbe_get_hw_control(adapter);
1927
021230d4
AV		 1928 if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) ||
1929 (adapter->flags & IXGBE_FLAG_MSI_ENABLED)) {
9a799d71
AK		 1930 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1931 gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
b4617240 1932 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
9a799d71
AK		 1933 } else {
1934 /* MSI only */
021230d4 1935 gpie = 0;
9a799d71 1936 }
021230d4
AV		 1937 /* XXX: to interrupt immediately for EICS writes, enable this */
1938 /* gpie |= IXGBE_GPIE_EIMEN; */
1939 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
9a799d71
AK		 1940 }
1941
021230d4
AV		 1942 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
1943 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
1944 * specifically only auto mask tx and rx interrupts */
1945 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
1946 }
9a799d71 1947
0befdb3e
JB		 1948 /* Enable fan failure interrupt if media type is copper */
1949 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
1950 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
1951 gpie |= IXGBE_SDP1_GPIEN;
1952 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
1953 }
1954
021230d4 1955 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
9a799d71
AK		 1956 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
1957 mhadd &= ~IXGBE_MHADD_MFS_MASK;
1958 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
1959
1960 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
1961 }
1962
1963 for (i = 0; i < adapter->num_tx_queues; i++) {
021230d4
AV		 1964 j = adapter->tx_ring[i].reg_idx;
1965 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
e01c31a5
JB		 1966 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
1967 txdctl |= (8 << 16);
9a799d71 1968 txdctl |= IXGBE_TXDCTL_ENABLE;
021230d4 1969 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
9a799d71
AK		 1970 }
1971
1972 for (i = 0; i < adapter->num_rx_queues; i++) {
021230d4
AV		 1973 j = adapter->rx_ring[i].reg_idx;
1974 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
1975 /* enable PTHRESH=32 descriptors (half the internal cache)
1976 * and HTHRESH=0 descriptors (to minimize latency on fetch),
1977 * this also removes a pesky rx_no_buffer_count increment */
1978 rxdctl |= 0x0020;
9a799d71 1979 rxdctl |= IXGBE_RXDCTL_ENABLE;
021230d4 1980 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), rxdctl);
9a799d71
AK		 1981 }
1982 /* enable all receives */
1983 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1984 rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
1985 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxdctl);
1986
1987 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
1988 ixgbe_configure_msix(adapter);
1989 else
1990 ixgbe_configure_msi_and_legacy(adapter);
1991
1992 clear_bit(__IXGBE_DOWN, &adapter->state);
021230d4
AV		 1993 ixgbe_napi_enable_all(adapter);
1994
1995 /* clear any pending interrupts, may auto mask */
1996 IXGBE_READ_REG(hw, IXGBE_EICR);
1997
9a799d71
AK		 1998 ixgbe_irq_enable(adapter);
1999
2000 /* bring the link up in the watchdog, this could race with our first
2001 * link up interrupt but shouldn't be a problem */
cf8280ee
JB		 2002 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2003 adapter->link_check_timeout = jiffies;
9a799d71
AK		 2004 mod_timer(&adapter->watchdog_timer, jiffies);
2005 return 0;
2006}
2007
d4f80882
AV		 2008void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
2009{
2010 WARN_ON(in_interrupt());
2011 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
2012 msleep(1);
2013 ixgbe_down(adapter);
2014 ixgbe_up(adapter);
2015 clear_bit(__IXGBE_RESETTING, &adapter->state);
2016}
2017
9a799d71
AK		 2018int ixgbe_up(struct ixgbe_adapter *adapter)
2019{
2020 /* hardware has been reset, we need to reload some things */
2021 ixgbe_configure(adapter);
2022
2023 return ixgbe_up_complete(adapter);
2024}
2025
2026void ixgbe_reset(struct ixgbe_adapter *adapter)
2027{
c44ade9e
JB		 2028 struct ixgbe_hw *hw = &adapter->hw;
2029 if (hw->mac.ops.init_hw(hw))
2030 dev_err(&adapter->pdev->dev, "Hardware Error\n");
9a799d71
AK		 2031
2032 /* reprogram the RAR[0] in case user changed it. */
c44ade9e 2033 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
9a799d71
AK		 2034
2035}
2036
9a799d71
AK		 2037/**
2038 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
2039 * @adapter: board private structure
2040 * @rx_ring: ring to free buffers from
2041 **/
2042static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
b4617240 2043 struct ixgbe_ring *rx_ring)
9a799d71
AK		 2044{
2045 struct pci_dev *pdev = adapter->pdev;
2046 unsigned long size;
2047 unsigned int i;
2048
2049 /* Free all the Rx ring sk_buffs */
2050
2051 for (i = 0; i < rx_ring->count; i++) {
2052 struct ixgbe_rx_buffer *rx_buffer_info;
2053
2054 rx_buffer_info = &rx_ring->rx_buffer_info[i];
2055 if (rx_buffer_info->dma) {
2056 pci_unmap_single(pdev, rx_buffer_info->dma,
b4617240
PW		 2057 rx_ring->rx_buf_len,
2058 PCI_DMA_FROMDEVICE);
9a799d71
AK		 2059 rx_buffer_info->dma = 0;
2060 }
2061 if (rx_buffer_info->skb) {
2062 dev_kfree_skb(rx_buffer_info->skb);
2063 rx_buffer_info->skb = NULL;
2064 }
2065 if (!rx_buffer_info->page)
2066 continue;
762f4c57
JB		 2067 pci_unmap_page(pdev, rx_buffer_info->page_dma, PAGE_SIZE / 2,
2068 PCI_DMA_FROMDEVICE);
9a799d71 2069 rx_buffer_info->page_dma = 0;
9a799d71
AK		 2070 put_page(rx_buffer_info->page);
2071 rx_buffer_info->page = NULL;
762f4c57 2072 rx_buffer_info->page_offset = 0;
9a799d71
AK		 2073 }
2074
2075 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
2076 memset(rx_ring->rx_buffer_info, 0, size);
2077
2078 /* Zero out the descriptor ring */
2079 memset(rx_ring->desc, 0, rx_ring->size);
2080
2081 rx_ring->next_to_clean = 0;
2082 rx_ring->next_to_use = 0;
2083
2084 writel(0, adapter->hw.hw_addr + rx_ring->head);
2085 writel(0, adapter->hw.hw_addr + rx_ring->tail);
2086}
2087
2088/**
2089 * ixgbe_clean_tx_ring - Free Tx Buffers
2090 * @adapter: board private structure
2091 * @tx_ring: ring to be cleaned
2092 **/
2093static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
b4617240 2094 struct ixgbe_ring *tx_ring)
9a799d71
AK		 2095{
2096 struct ixgbe_tx_buffer *tx_buffer_info;
2097 unsigned long size;
2098 unsigned int i;
2099
2100 /* Free all the Tx ring sk_buffs */
2101
2102 for (i = 0; i < tx_ring->count; i++) {
2103 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2104 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
2105 }
2106
2107 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
2108 memset(tx_ring->tx_buffer_info, 0, size);
2109
2110 /* Zero out the descriptor ring */
2111 memset(tx_ring->desc, 0, tx_ring->size);
2112
2113 tx_ring->next_to_use = 0;
2114 tx_ring->next_to_clean = 0;
2115
2116 writel(0, adapter->hw.hw_addr + tx_ring->head);
2117 writel(0, adapter->hw.hw_addr + tx_ring->tail);
2118}
2119
2120/**
021230d4 2121 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
9a799d71
AK		 2122 * @adapter: board private structure
2123 **/
021230d4 2124static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
9a799d71
AK		 2125{
2126 int i;
2127
021230d4
AV		 2128 for (i = 0; i < adapter->num_rx_queues; i++)
2129 ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
9a799d71
AK		 2130}
2131
2132/**
021230d4 2133 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
9a799d71
AK		 2134 * @adapter: board private structure
2135 **/
021230d4 2136static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
9a799d71
AK		 2137{
2138 int i;
2139
021230d4
AV		 2140 for (i = 0; i < adapter->num_tx_queues; i++)
2141 ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
9a799d71
AK		 2142}
2143
2144void ixgbe_down(struct ixgbe_adapter *adapter)
2145{
2146 struct net_device *netdev = adapter->netdev;
7f821875 2147 struct ixgbe_hw *hw = &adapter->hw;
9a799d71 2148 u32 rxctrl;
7f821875
JB		 2149 u32 txdctl;
2150 int i, j;
9a799d71
AK		 2151
2152 /* signal that we are down to the interrupt handler */
2153 set_bit(__IXGBE_DOWN, &adapter->state);
2154
2155 /* disable receives */
7f821875
JB		 2156 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2157 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
9a799d71
AK		 2158
2159 netif_tx_disable(netdev);
2160
7f821875 2161 IXGBE_WRITE_FLUSH(hw);
9a799d71
AK		 2162 msleep(10);
2163
7f821875
JB		 2164 netif_tx_stop_all_queues(netdev);
2165
9a799d71
AK		 2166 ixgbe_irq_disable(adapter);
2167
021230d4 2168 ixgbe_napi_disable_all(adapter);
7f821875 2169
9a799d71 2170 del_timer_sync(&adapter->watchdog_timer);
cf8280ee 2171 cancel_work_sync(&adapter->watchdog_task);
9a799d71 2172
7f821875
JB		 2173 /* disable transmits in the hardware now that interrupts are off */
2174 for (i = 0; i < adapter->num_tx_queues; i++) {
2175 j = adapter->tx_ring[i].reg_idx;
2176 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2177 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
2178 (txdctl & ~IXGBE_TXDCTL_ENABLE));
2179 }
2180
9a799d71 2181 netif_carrier_off(netdev);
9a799d71 2182
5dd2d332 2183#ifdef CONFIG_IXGBE_DCA
96b0e0f6
JB		 2184 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
2185 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
2186 dca_remove_requester(&adapter->pdev->dev);
2187 }
2188
2189#endif
6f4a0e45
PL		 2190 if (!pci_channel_offline(adapter->pdev))
2191 ixgbe_reset(adapter);
9a799d71
AK		 2192 ixgbe_clean_all_tx_rings(adapter);
2193 ixgbe_clean_all_rx_rings(adapter);
2194
5dd2d332 2195#ifdef CONFIG_IXGBE_DCA
96b0e0f6
JB		 2196 /* since we reset the hardware DCA settings were cleared */
2197 if (dca_add_requester(&adapter->pdev->dev) == 0) {
2198 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
2199 /* always use CB2 mode, difference is masked
2200 * in the CB driver */
b4617240 2201 IXGBE_WRITE_REG(hw, IXGBE_DCA_CTRL, 2);
96b0e0f6
JB		 2202 ixgbe_setup_dca(adapter);
2203 }
2204#endif
9a799d71
AK		 2205}
2206
9a799d71 2207/**
021230d4
AV		 2208 * ixgbe_poll - NAPI Rx polling callback
2209 * @napi: structure for representing this polling device
2210 * @budget: how many packets driver is allowed to clean
2211 *
2212 * This function is used for legacy and MSI, NAPI mode
9a799d71 2213 **/
021230d4 2214static int ixgbe_poll(struct napi_struct *napi, int budget)
9a799d71 2215{
021230d4 2216 struct ixgbe_q_vector *q_vector = container_of(napi,
b4617240 2217 struct ixgbe_q_vector, napi);
021230d4 2218 struct ixgbe_adapter *adapter = q_vector->adapter;
74ce8dd2 2219 int tx_cleaned, work_done = 0;
9a799d71 2220
5dd2d332 2221#ifdef CONFIG_IXGBE_DCA
bd0362dd
JC		 2222 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
2223 ixgbe_update_tx_dca(adapter, adapter->tx_ring);
2224 ixgbe_update_rx_dca(adapter, adapter->rx_ring);
2225 }
2226#endif
2227
d2c7ddd6 2228 tx_cleaned = ixgbe_clean_tx_irq(adapter, adapter->tx_ring);
021230d4 2229 ixgbe_clean_rx_irq(adapter, adapter->rx_ring, &work_done, budget);
9a799d71 2230
d2c7ddd6
DM		 2231 if (tx_cleaned)
2232 work_done = budget;
2233
53e52c72
DM		 2234 /* If budget not fully consumed, exit the polling mode */
2235 if (work_done < budget) {
021230d4 2236 netif_rx_complete(adapter->netdev, napi);
30efa5a3 2237 if (adapter->itr_setting & 3)
f494e8fa 2238 ixgbe_set_itr(adapter);
d4f80882
AV		 2239 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2240 ixgbe_irq_enable(adapter);
9a799d71 2241 }
9a799d71
AK		 2242 return work_done;
2243}
2244
2245/**
2246 * ixgbe_tx_timeout - Respond to a Tx Hang
2247 * @netdev: network interface device structure
2248 **/
2249static void ixgbe_tx_timeout(struct net_device *netdev)
2250{
2251 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2252
2253 /* Do the reset outside of interrupt context */
2254 schedule_work(&adapter->reset_task);
2255}
2256
2257static void ixgbe_reset_task(struct work_struct *work)
2258{
2259 struct ixgbe_adapter *adapter;
2260 adapter = container_of(work, struct ixgbe_adapter, reset_task);
2261
2262 adapter->tx_timeout_count++;
2263
d4f80882 2264 ixgbe_reinit_locked(adapter);
9a799d71
AK		 2265}
2266
b9804972
JB		 2267static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
2268{
2269 int nrq = 1, ntq = 1;
2270 int feature_mask = 0, rss_i, rss_m;
2271
2272 /* Number of supported queues */
2273 switch (adapter->hw.mac.type) {
2274 case ixgbe_mac_82598EB:
2275 rss_i = adapter->ring_feature[RING_F_RSS].indices;
2276 rss_m = 0;
2277 feature_mask |= IXGBE_FLAG_RSS_ENABLED;
2278
2279 switch (adapter->flags & feature_mask) {
2280 case (IXGBE_FLAG_RSS_ENABLED):
2281 rss_m = 0xF;
2282 nrq = rss_i;
2283 ntq = rss_i;
2284 break;
2285 case 0:
2286 default:
2287 rss_i = 0;
2288 rss_m = 0;
2289 nrq = 1;
2290 ntq = 1;
2291 break;
2292 }
2293
2294 adapter->ring_feature[RING_F_RSS].indices = rss_i;
2295 adapter->ring_feature[RING_F_RSS].mask = rss_m;
2296 break;
2297 default:
2298 nrq = 1;
2299 ntq = 1;
2300 break;
2301 }
2302
2303 adapter->num_rx_queues = nrq;
2304 adapter->num_tx_queues = ntq;
2305}
2306
021230d4 2307static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
b4617240 2308 int vectors)
021230d4
AV		 2309{
2310 int err, vector_threshold;
2311
2312 /* We'll want at least 3 (vector_threshold):
2313 * 1) TxQ[0] Cleanup
2314 * 2) RxQ[0] Cleanup
2315 * 3) Other (Link Status Change, etc.)
2316 * 4) TCP Timer (optional)
2317 */
2318 vector_threshold = MIN_MSIX_COUNT;
2319
2320 /* The more we get, the more we will assign to Tx/Rx Cleanup
2321 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
2322 * Right now, we simply care about how many we'll get; we'll
2323 * set them up later while requesting irq's.
2324 */
2325 while (vectors >= vector_threshold) {
2326 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
b4617240 2327 vectors);
021230d4
AV		 2328 if (!err) /* Success in acquiring all requested vectors. */
2329 break;
2330 else if (err < 0)
2331 vectors = 0; /* Nasty failure, quit now */
2332 else /* err == number of vectors we should try again with */
2333 vectors = err;
2334 }
2335
2336 if (vectors < vector_threshold) {
2337 /* Can't allocate enough MSI-X interrupts? Oh well.
2338 * This just means we'll go with either a single MSI
2339 * vector or fall back to legacy interrupts.
2340 */
2341 DPRINTK(HW, DEBUG, "Unable to allocate MSI-X interrupts\n");
2342 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2343 kfree(adapter->msix_entries);
2344 adapter->msix_entries = NULL;
2345 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
b9804972 2346 ixgbe_set_num_queues(adapter);
021230d4
AV		 2347 } else {
2348 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
2349 adapter->num_msix_vectors = vectors;
2350 }
2351}
2352
021230d4
AV		 2353/**
2354 * ixgbe_cache_ring_register - Descriptor ring to register mapping
2355 * @adapter: board private structure to initialize
2356 *
2357 * Once we know the feature-set enabled for the device, we'll cache
2358 * the register offset the descriptor ring is assigned to.
2359 **/
2360static void __devinit ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
2361{
021230d4
AV		 2362 int feature_mask = 0, rss_i;
2363 int i, txr_idx, rxr_idx;
2364
2365 /* Number of supported queues */
2366 switch (adapter->hw.mac.type) {
2367 case ixgbe_mac_82598EB:
2368 rss_i = adapter->ring_feature[RING_F_RSS].indices;
2369 txr_idx = 0;
2370 rxr_idx = 0;
2371 feature_mask |= IXGBE_FLAG_RSS_ENABLED;
2372 switch (adapter->flags & feature_mask) {
2373 case (IXGBE_FLAG_RSS_ENABLED):
2374 for (i = 0; i < adapter->num_rx_queues; i++)
2375 adapter->rx_ring[i].reg_idx = i;
2376 for (i = 0; i < adapter->num_tx_queues; i++)
2377 adapter->tx_ring[i].reg_idx = i;
2378 break;
2379 case 0:
2380 default:
2381 break;
2382 }
2383 break;
2384 default:
2385 break;
2386 }
2387}
2388
9a799d71
AK		 2389/**
2390 * ixgbe_alloc_queues - Allocate memory for all rings
2391 * @adapter: board private structure to initialize
2392 *
2393 * We allocate one ring per queue at run-time since we don't know the
2394 * number of queues at compile-time. The polling_netdev array is
2395 * intended for Multiqueue, but should work fine with a single queue.
2396 **/
2397static int __devinit ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
2398{
2399 int i;
2400
2401 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
b4617240 2402 sizeof(struct ixgbe_ring), GFP_KERNEL);
9a799d71 2403 if (!adapter->tx_ring)
021230d4 2404 goto err_tx_ring_allocation;
9a799d71
AK		 2405
2406 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
b4617240 2407 sizeof(struct ixgbe_ring), GFP_KERNEL);
021230d4
AV		 2408 if (!adapter->rx_ring)
2409 goto err_rx_ring_allocation;
9a799d71 2410
021230d4 2411 for (i = 0; i < adapter->num_tx_queues; i++) {
b9804972 2412 adapter->tx_ring[i].count = adapter->tx_ring_count;
021230d4
AV		 2413 adapter->tx_ring[i].queue_index = i;
2414 }
b9804972 2415
9a799d71 2416 for (i = 0; i < adapter->num_rx_queues; i++) {
b9804972 2417 adapter->rx_ring[i].count = adapter->rx_ring_count;
021230d4
AV		 2418 adapter->rx_ring[i].queue_index = i;
2419 }
2420
2421 ixgbe_cache_ring_register(adapter);
2422
2423 return 0;
2424
2425err_rx_ring_allocation:
2426 kfree(adapter->tx_ring);
2427err_tx_ring_allocation:
2428 return -ENOMEM;
2429}
2430
2431/**
2432 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
2433 * @adapter: board private structure to initialize
2434 *
2435 * Attempt to configure the interrupts using the best available
2436 * capabilities of the hardware and the kernel.
2437 **/
2438static int __devinit ixgbe_set_interrupt_capability(struct ixgbe_adapter
b4617240 2439 *adapter)
021230d4
AV		 2440{
2441 int err = 0;
2442 int vector, v_budget;
2443
2444 /*
2445 * It's easy to be greedy for MSI-X vectors, but it really
2446 * doesn't do us much good if we have a lot more vectors
2447 * than CPU's. So let's be conservative and only ask for
2448 * (roughly) twice the number of vectors as there are CPU's.
2449 */
2450 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
b4617240 2451 (int)(num_online_cpus() * 2)) + NON_Q_VECTORS;
021230d4
AV		 2452
2453 /*
2454 * At the same time, hardware can only support a maximum of
2455 * MAX_MSIX_COUNT vectors. With features such as RSS and VMDq,
2456 * we can easily reach upwards of 64 Rx descriptor queues and
2457 * 32 Tx queues. Thus, we cap it off in those rare cases where
2458 * the cpu count also exceeds our vector limit.
2459 */
2460 v_budget = min(v_budget, MAX_MSIX_COUNT);
2461
2462 /* A failure in MSI-X entry allocation isn't fatal, but it does
2463 * mean we disable MSI-X capabilities of the adapter. */
2464 adapter->msix_entries = kcalloc(v_budget,
b4617240 2465 sizeof(struct msix_entry), GFP_KERNEL);
021230d4
AV		 2466 if (!adapter->msix_entries) {
2467 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
2468 ixgbe_set_num_queues(adapter);
2469 kfree(adapter->tx_ring);
2470 kfree(adapter->rx_ring);
2471 err = ixgbe_alloc_queues(adapter);
2472 if (err) {
2473 DPRINTK(PROBE, ERR, "Unable to allocate memory "
b4617240 2474 "for queues\n");
021230d4
AV		 2475 goto out;
2476 }
2477
2478 goto try_msi;
2479 }
2480
2481 for (vector = 0; vector < v_budget; vector++)
2482 adapter->msix_entries[vector].entry = vector;
2483
2484 ixgbe_acquire_msix_vectors(adapter, v_budget);
2485
2486 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2487 goto out;
2488
2489try_msi:
2490 err = pci_enable_msi(adapter->pdev);
2491 if (!err) {
2492 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
2493 } else {
2494 DPRINTK(HW, DEBUG, "Unable to allocate MSI interrupt, "
b4617240 2495 "falling back to legacy. Error: %d\n", err);
021230d4
AV		 2496 /* reset err */
2497 err = 0;
2498 }
2499
2500out:
30eba97a 2501 /* Notify the stack of the (possibly) reduced Tx Queue count. */
fd2ea0a7 2502 adapter->netdev->real_num_tx_queues = adapter->num_tx_queues;
021230d4
AV		 2503
2504 return err;
2505}
2506
2507static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
2508{
2509 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2510 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2511 pci_disable_msix(adapter->pdev);
2512 kfree(adapter->msix_entries);
2513 adapter->msix_entries = NULL;
2514 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
2515 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
2516 pci_disable_msi(adapter->pdev);
2517 }
2518 return;
2519}
2520
2521/**
2522 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
2523 * @adapter: board private structure to initialize
2524 *
2525 * We determine which interrupt scheme to use based on...
2526 * - Kernel support (MSI, MSI-X)
2527 * - which can be user-defined (via MODULE_PARAM)
2528 * - Hardware queue count (num_*_queues)
2529 * - defined by miscellaneous hardware support/features (RSS, etc.)
2530 **/
2531static int __devinit ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
2532{
2533 int err;
2534
2535 /* Number of supported queues */
2536 ixgbe_set_num_queues(adapter);
2537
2538 err = ixgbe_alloc_queues(adapter);
2539 if (err) {
2540 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
2541 goto err_alloc_queues;
2542 }
2543
2544 err = ixgbe_set_interrupt_capability(adapter);
2545 if (err) {
2546 DPRINTK(PROBE, ERR, "Unable to setup interrupt capabilities\n");
2547 goto err_set_interrupt;
9a799d71
AK		 2548 }
2549
021230d4 2550 DPRINTK(DRV, INFO, "Multiqueue %s: Rx Queue count = %u, "
b4617240
PW		 2551 "Tx Queue count = %u\n",
2552 (adapter->num_rx_queues > 1) ? "Enabled" :
2553 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
021230d4
AV		 2554
2555 set_bit(__IXGBE_DOWN, &adapter->state);
2556
9a799d71 2557 return 0;
021230d4
AV		 2558
2559err_set_interrupt:
2560 kfree(adapter->tx_ring);
2561 kfree(adapter->rx_ring);
2562err_alloc_queues:
2563 return err;
9a799d71
AK		 2564}
2565
2566/**
2567 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
2568 * @adapter: board private structure to initialize
2569 *
2570 * ixgbe_sw_init initializes the Adapter private data structure.
2571 * Fields are initialized based on PCI device information and
2572 * OS network device settings (MTU size).
2573 **/
2574static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
2575{
2576 struct ixgbe_hw *hw = &adapter->hw;
2577 struct pci_dev *pdev = adapter->pdev;
021230d4
AV		 2578 unsigned int rss;
2579
c44ade9e
JB		 2580 /* PCI config space info */
2581
2582 hw->vendor_id = pdev->vendor;
2583 hw->device_id = pdev->device;
2584 hw->revision_id = pdev->revision;
2585 hw->subsystem_vendor_id = pdev->subsystem_vendor;
2586 hw->subsystem_device_id = pdev->subsystem_device;
2587
021230d4
AV		 2588 /* Set capability flags */
2589 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
2590 adapter->ring_feature[RING_F_RSS].indices = rss;
2591 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
0befdb3e
JB		 2592 if (hw->mac.ops.get_media_type &&
2593 (hw->mac.ops.get_media_type(hw) == ixgbe_media_type_copper))
2594 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
9a799d71
AK		 2595
2596 /* default flow control settings */
2b9ade93
JB		 2597 hw->fc.original_type = ixgbe_fc_none;
2598 hw->fc.type = ixgbe_fc_none;
2599 hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
2600 hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
2601 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
2602 hw->fc.send_xon = true;
9a799d71 2603
021230d4 2604 /* select 10G link by default */
9a799d71 2605 hw->mac.link_mode_select = IXGBE_AUTOC_LMS_10G_LINK_NO_AN;
9a799d71 2606
30efa5a3
JB		 2607 /* enable itr by default in dynamic mode */
2608 adapter->itr_setting = 1;
2609 adapter->eitr_param = 20000;
2610
2611 /* set defaults for eitr in MegaBytes */
2612 adapter->eitr_low = 10;
2613 adapter->eitr_high = 20;
2614
2615 /* set default ring sizes */
2616 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
2617 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
2618
9a799d71 2619 /* initialize eeprom parameters */
c44ade9e 2620 if (ixgbe_init_eeprom_params_generic(hw)) {
9a799d71
AK		 2621 dev_err(&pdev->dev, "EEPROM initialization failed\n");
2622 return -EIO;
2623 }
2624
021230d4 2625 /* enable rx csum by default */
9a799d71
AK		 2626 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
2627
9a799d71
AK		 2628 set_bit(__IXGBE_DOWN, &adapter->state);
2629
2630 return 0;
2631}
2632
2633/**
2634 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
2635 * @adapter: board private structure
3a581073 2636 * @tx_ring: tx descriptor ring (for a specific queue) to setup
9a799d71
AK		 2637 *
2638 * Return 0 on success, negative on failure
2639 **/
2640int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
e01c31a5 2641 struct ixgbe_ring *tx_ring)
9a799d71
AK		 2642{
2643 struct pci_dev *pdev = adapter->pdev;
2644 int size;
2645
3a581073
JB		 2646 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
2647 tx_ring->tx_buffer_info = vmalloc(size);
e01c31a5
JB		 2648 if (!tx_ring->tx_buffer_info)
2649 goto err;
3a581073 2650 memset(tx_ring->tx_buffer_info, 0, size);
9a799d71
AK		 2651
2652 /* round up to nearest 4K */
e01c31a5
JB		 2653 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc) +
2654 sizeof(u32);
3a581073 2655 tx_ring->size = ALIGN(tx_ring->size, 4096);
9a799d71 2656
3a581073
JB		 2657 tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
2658 &tx_ring->dma);
e01c31a5
JB		 2659 if (!tx_ring->desc)
2660 goto err;
9a799d71 2661
3a581073
JB		 2662 tx_ring->next_to_use = 0;
2663 tx_ring->next_to_clean = 0;
2664 tx_ring->work_limit = tx_ring->count;
9a799d71 2665 return 0;
e01c31a5
JB		 2666
2667err:
2668 vfree(tx_ring->tx_buffer_info);
2669 tx_ring->tx_buffer_info = NULL;
2670 DPRINTK(PROBE, ERR, "Unable to allocate memory for the transmit "
2671 "descriptor ring\n");
2672 return -ENOMEM;
9a799d71
AK		 2673}
2674
69888674
AD		 2675/**
2676 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
2677 * @adapter: board private structure
2678 *
2679 * If this function returns with an error, then it's possible one or
2680 * more of the rings is populated (while the rest are not). It is the
2681 * callers duty to clean those orphaned rings.
2682 *
2683 * Return 0 on success, negative on failure
2684 **/
2685static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
2686{
2687 int i, err = 0;
2688
2689 for (i = 0; i < adapter->num_tx_queues; i++) {
2690 err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]);
2691 if (!err)
2692 continue;
2693 DPRINTK(PROBE, ERR, "Allocation for Tx Queue %u failed\n", i);
2694 break;
2695 }
2696
2697 return err;
2698}
2699
9a799d71
AK		 2700/**
2701 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
2702 * @adapter: board private structure
3a581073 2703 * @rx_ring: rx descriptor ring (for a specific queue) to setup
9a799d71
AK		 2704 *
2705 * Returns 0 on success, negative on failure
2706 **/
2707int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
b4617240 2708 struct ixgbe_ring *rx_ring)
9a799d71
AK		 2709{
2710 struct pci_dev *pdev = adapter->pdev;
021230d4 2711 int size;
9a799d71 2712
177db6ff 2713 size = sizeof(struct net_lro_desc) * IXGBE_MAX_LRO_DESCRIPTORS;
3a581073
JB		 2714 rx_ring->lro_mgr.lro_arr = vmalloc(size);
2715 if (!rx_ring->lro_mgr.lro_arr)
177db6ff 2716 return -ENOMEM;
3a581073 2717 memset(rx_ring->lro_mgr.lro_arr, 0, size);
177db6ff 2718
3a581073
JB		 2719 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
2720 rx_ring->rx_buffer_info = vmalloc(size);
2721 if (!rx_ring->rx_buffer_info) {
9a799d71 2722 DPRINTK(PROBE, ERR,
b4617240 2723 "vmalloc allocation failed for the rx desc ring\n");
177db6ff 2724 goto alloc_failed;
9a799d71 2725 }
3a581073 2726 memset(rx_ring->rx_buffer_info, 0, size);
9a799d71 2727
9a799d71 2728 /* Round up to nearest 4K */
3a581073
JB		 2729 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
2730 rx_ring->size = ALIGN(rx_ring->size, 4096);
9a799d71 2731
3a581073 2732 rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size, &rx_ring->dma);
9a799d71 2733
3a581073 2734 if (!rx_ring->desc) {
9a799d71 2735 DPRINTK(PROBE, ERR,
b4617240 2736 "Memory allocation failed for the rx desc ring\n");
3a581073 2737 vfree(rx_ring->rx_buffer_info);
177db6ff 2738 goto alloc_failed;
9a799d71
AK		 2739 }
2740
3a581073
JB		 2741 rx_ring->next_to_clean = 0;
2742 rx_ring->next_to_use = 0;
9a799d71
AK		 2743
2744 return 0;
177db6ff
MC		 2745
2746alloc_failed:
3a581073
JB		 2747 vfree(rx_ring->lro_mgr.lro_arr);
2748 rx_ring->lro_mgr.lro_arr = NULL;
177db6ff 2749 return -ENOMEM;
9a799d71
AK		 2750}
2751
69888674
AD		 2752/**
2753 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
2754 * @adapter: board private structure
2755 *
2756 * If this function returns with an error, then it's possible one or
2757 * more of the rings is populated (while the rest are not). It is the
2758 * callers duty to clean those orphaned rings.
2759 *
2760 * Return 0 on success, negative on failure
2761 **/
2762
2763static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
2764{
2765 int i, err = 0;
2766
2767 for (i = 0; i < adapter->num_rx_queues; i++) {
2768 err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]);
2769 if (!err)
2770 continue;
2771 DPRINTK(PROBE, ERR, "Allocation for Rx Queue %u failed\n", i);
2772 break;
2773 }
2774
2775 return err;
2776}
2777
9a799d71
AK		 2778/**
2779 * ixgbe_free_tx_resources - Free Tx Resources per Queue
2780 * @adapter: board private structure
2781 * @tx_ring: Tx descriptor ring for a specific queue
2782 *
2783 * Free all transmit software resources
2784 **/
c431f97e
JB		 2785void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
2786 struct ixgbe_ring *tx_ring)
9a799d71
AK		 2787{
2788 struct pci_dev *pdev = adapter->pdev;
2789
2790 ixgbe_clean_tx_ring(adapter, tx_ring);
2791
2792 vfree(tx_ring->tx_buffer_info);
2793 tx_ring->tx_buffer_info = NULL;
2794
2795 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2796
2797 tx_ring->desc = NULL;
2798}
2799
2800/**
2801 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
2802 * @adapter: board private structure
2803 *
2804 * Free all transmit software resources
2805 **/
2806static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
2807{
2808 int i;
2809
2810 for (i = 0; i < adapter->num_tx_queues; i++)
2811 ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
2812}
2813
2814/**
b4617240 2815 * ixgbe_free_rx_resources - Free Rx Resources
9a799d71
AK		 2816 * @adapter: board private structure
2817 * @rx_ring: ring to clean the resources from
2818 *
2819 * Free all receive software resources
2820 **/
c431f97e
JB		 2821void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
2822 struct ixgbe_ring *rx_ring)
9a799d71
AK		 2823{
2824 struct pci_dev *pdev = adapter->pdev;
2825
177db6ff
MC		 2826 vfree(rx_ring->lro_mgr.lro_arr);
2827 rx_ring->lro_mgr.lro_arr = NULL;
2828
9a799d71
AK		 2829 ixgbe_clean_rx_ring(adapter, rx_ring);
2830
2831 vfree(rx_ring->rx_buffer_info);
2832 rx_ring->rx_buffer_info = NULL;
2833
2834 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2835
2836 rx_ring->desc = NULL;
2837}
2838
2839/**
2840 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
2841 * @adapter: board private structure
2842 *
2843 * Free all receive software resources
2844 **/
2845static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
2846{
2847 int i;
2848
2849 for (i = 0; i < adapter->num_rx_queues; i++)
2850 ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
2851}
2852
9a799d71
AK		 2853/**
2854 * ixgbe_change_mtu - Change the Maximum Transfer Unit
2855 * @netdev: network interface device structure
2856 * @new_mtu: new value for maximum frame size
2857 *
2858 * Returns 0 on success, negative on failure
2859 **/
2860static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
2861{
2862 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2863 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2864
42c783c5
JB		 2865 /* MTU < 68 is an error and causes problems on some kernels */
2866 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
9a799d71
AK		 2867 return -EINVAL;
2868
021230d4 2869 DPRINTK(PROBE, INFO, "changing MTU from %d to %d\n",
b4617240 2870 netdev->mtu, new_mtu);
021230d4 2871 /* must set new MTU before calling down or up */
9a799d71
AK		 2872 netdev->mtu = new_mtu;
2873
d4f80882
AV		 2874 if (netif_running(netdev))
2875 ixgbe_reinit_locked(adapter);
9a799d71
AK		 2876
2877 return 0;
2878}
2879
2880/**
2881 * ixgbe_open - Called when a network interface is made active
2882 * @netdev: network interface device structure
2883 *
2884 * Returns 0 on success, negative value on failure
2885 *
2886 * The open entry point is called when a network interface is made
2887 * active by the system (IFF_UP). At this point all resources needed
2888 * for transmit and receive operations are allocated, the interrupt
2889 * handler is registered with the OS, the watchdog timer is started,
2890 * and the stack is notified that the interface is ready.
2891 **/
2892static int ixgbe_open(struct net_device *netdev)
2893{
2894 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2895 int err;
4bebfaa5
AK		 2896
2897 /* disallow open during test */
2898 if (test_bit(__IXGBE_TESTING, &adapter->state))
2899 return -EBUSY;
9a799d71 2900
9a799d71
AK		 2901 /* allocate transmit descriptors */
2902 err = ixgbe_setup_all_tx_resources(adapter);
2903 if (err)
2904 goto err_setup_tx;
2905
9a799d71
AK		 2906 /* allocate receive descriptors */
2907 err = ixgbe_setup_all_rx_resources(adapter);
2908 if (err)
2909 goto err_setup_rx;
2910
2911 ixgbe_configure(adapter);
2912
021230d4 2913 err = ixgbe_request_irq(adapter);
9a799d71
AK		 2914 if (err)
2915 goto err_req_irq;
2916
9a799d71
AK		 2917 err = ixgbe_up_complete(adapter);
2918 if (err)
2919 goto err_up;
2920
d55b53ff
JK		 2921 netif_tx_start_all_queues(netdev);
2922
9a799d71
AK		 2923 return 0;
2924
2925err_up:
5eba3699 2926 ixgbe_release_hw_control(adapter);
9a799d71
AK		 2927 ixgbe_free_irq(adapter);
2928err_req_irq:
2929 ixgbe_free_all_rx_resources(adapter);
2930err_setup_rx:
2931 ixgbe_free_all_tx_resources(adapter);
2932err_setup_tx:
2933 ixgbe_reset(adapter);
2934
2935 return err;
2936}
2937
2938/**
2939 * ixgbe_close - Disables a network interface
2940 * @netdev: network interface device structure
2941 *
2942 * Returns 0, this is not allowed to fail
2943 *
2944 * The close entry point is called when an interface is de-activated
2945 * by the OS. The hardware is still under the drivers control, but
2946 * needs to be disabled. A global MAC reset is issued to stop the
2947 * hardware, and all transmit and receive resources are freed.
2948 **/
2949static int ixgbe_close(struct net_device *netdev)
2950{
2951 struct ixgbe_adapter *adapter = netdev_priv(netdev);
9a799d71
AK		 2952
2953 ixgbe_down(adapter);
2954 ixgbe_free_irq(adapter);
2955
2956 ixgbe_free_all_tx_resources(adapter);
2957 ixgbe_free_all_rx_resources(adapter);
2958
5eba3699 2959 ixgbe_release_hw_control(adapter);
9a799d71
AK		 2960
2961 return 0;
2962}
2963
b3c8b4ba
AD		 2964/**
2965 * ixgbe_napi_add_all - prep napi structs for use
2966 * @adapter: private struct
2967 * helper function to napi_add each possible q_vector->napi
2968 */
2969static void ixgbe_napi_add_all(struct ixgbe_adapter *adapter)
2970{
2971 int q_idx, q_vectors;
2972 int (*poll)(struct napi_struct *, int);
2973
2974 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2975 poll = &ixgbe_clean_rxonly;
2976 /* Only enable as many vectors as we have rx queues. */
2977 q_vectors = adapter->num_rx_queues;
2978 } else {
2979 poll = &ixgbe_poll;
2980 /* only one q_vector for legacy modes */
2981 q_vectors = 1;
2982 }
2983
2984 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2985 struct ixgbe_q_vector *q_vector = &adapter->q_vector[q_idx];
2986 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
2987 }
2988}
2989
2990static void ixgbe_napi_del_all(struct ixgbe_adapter *adapter)
2991{
2992 int q_idx;
2993 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2994
2995 /* legacy and MSI only use one vector */
2996 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2997 q_vectors = 1;
2998
2999 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3000 struct ixgbe_q_vector *q_vector = &adapter->q_vector[q_idx];
3001 if (!q_vector->rxr_count)
3002 continue;
3003 netif_napi_del(&q_vector->napi);
3004 }
3005}
3006
3007#ifdef CONFIG_PM
3008static int ixgbe_resume(struct pci_dev *pdev)
3009{
3010 struct net_device *netdev = pci_get_drvdata(pdev);
3011 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3012 u32 err;
3013
3014 pci_set_power_state(pdev, PCI_D0);
3015 pci_restore_state(pdev);
3016 err = pci_enable_device(pdev);
3017 if (err) {
69888674 3018 printk(KERN_ERR "ixgbe: Cannot enable PCI device from "
b3c8b4ba
AD		 3019 "suspend\n");
3020 return err;
3021 }
3022 pci_set_master(pdev);
3023
3024 pci_enable_wake(pdev, PCI_D3hot, 0);
3025 pci_enable_wake(pdev, PCI_D3cold, 0);
3026
3027 err = ixgbe_init_interrupt_scheme(adapter);
3028 if (err) {
3029 printk(KERN_ERR "ixgbe: Cannot initialize interrupts for "
3030 "device\n");
3031 return err;
3032 }
3033
3034 ixgbe_napi_add_all(adapter);
3035 ixgbe_reset(adapter);
3036
3037 if (netif_running(netdev)) {
3038 err = ixgbe_open(adapter->netdev);
3039 if (err)
3040 return err;
3041 }
3042
3043 netif_device_attach(netdev);
3044
3045 return 0;
3046}
3047
3048#endif /* CONFIG_PM */
3049static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
3050{
3051 struct net_device *netdev = pci_get_drvdata(pdev);
3052 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3053#ifdef CONFIG_PM
3054 int retval = 0;
3055#endif
3056
3057 netif_device_detach(netdev);
3058
3059 if (netif_running(netdev)) {
3060 ixgbe_down(adapter);
3061 ixgbe_free_irq(adapter);
3062 ixgbe_free_all_tx_resources(adapter);
3063 ixgbe_free_all_rx_resources(adapter);
3064 }
3065 ixgbe_reset_interrupt_capability(adapter);
3066 ixgbe_napi_del_all(adapter);
3067 kfree(adapter->tx_ring);
3068 kfree(adapter->rx_ring);
3069
3070#ifdef CONFIG_PM
3071 retval = pci_save_state(pdev);
3072 if (retval)
3073 return retval;
3074#endif
3075
3076 pci_enable_wake(pdev, PCI_D3hot, 0);
3077 pci_enable_wake(pdev, PCI_D3cold, 0);
3078
3079 ixgbe_release_hw_control(adapter);
3080
3081 pci_disable_device(pdev);
3082
3083 pci_set_power_state(pdev, pci_choose_state(pdev, state));
3084
3085 return 0;
3086}
3087
3088static void ixgbe_shutdown(struct pci_dev *pdev)
3089{
3090 ixgbe_suspend(pdev, PMSG_SUSPEND);
3091}
3092
9a799d71
AK		 3093/**
3094 * ixgbe_update_stats - Update the board statistics counters.
3095 * @adapter: board private structure
3096 **/
3097void ixgbe_update_stats(struct ixgbe_adapter *adapter)
3098{
3099 struct ixgbe_hw *hw = &adapter->hw;
6f11eef7
AV		 3100 u64 total_mpc = 0;
3101 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
9a799d71
AK		 3102
3103 adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
6f11eef7
AV		 3104 for (i = 0; i < 8; i++) {
3105 /* for packet buffers not used, the register should read 0 */
3106 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
3107 missed_rx += mpc;
3108 adapter->stats.mpc[i] += mpc;
3109 total_mpc += adapter->stats.mpc[i];
3110 adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
3111 }
3112 adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
3113 /* work around hardware counting issue */
3114 adapter->stats.gprc -= missed_rx;
3115
3116 /* 82598 hardware only has a 32 bit counter in the high register */
9a799d71 3117 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
6f11eef7
AV		 3118 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
3119 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
9a799d71
AK		 3120 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
3121 adapter->stats.bprc += bprc;
3122 adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
3123 adapter->stats.mprc -= bprc;
3124 adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
3125 adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
3126 adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
3127 adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
3128 adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
3129 adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
3130 adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
9a799d71
AK		 3131 adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
3132 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
9a799d71 3133 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
6f11eef7
AV		 3134 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
3135 adapter->stats.lxontxc += lxon;
3136 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
3137 adapter->stats.lxofftxc += lxoff;
9a799d71
AK		 3138 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
3139 adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
6f11eef7
AV		 3140 adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
3141 /*
3142 * 82598 errata - tx of flow control packets is included in tx counters
3143 */
3144 xon_off_tot = lxon + lxoff;
3145 adapter->stats.gptc -= xon_off_tot;
3146 adapter->stats.mptc -= xon_off_tot;
3147 adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
9a799d71
AK		 3148 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
3149 adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
3150 adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
9a799d71
AK		 3151 adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
3152 adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
6f11eef7 3153 adapter->stats.ptc64 -= xon_off_tot;
9a799d71
AK		 3154 adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
3155 adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
3156 adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
3157 adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
3158 adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
9a799d71
AK		 3159 adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
3160
3161 /* Fill out the OS statistics structure */
9a799d71
AK		 3162 adapter->net_stats.multicast = adapter->stats.mprc;
3163
3164 /* Rx Errors */
3165 adapter->net_stats.rx_errors = adapter->stats.crcerrs +
b4617240 3166 adapter->stats.rlec;
9a799d71
AK		 3167 adapter->net_stats.rx_dropped = 0;
3168 adapter->net_stats.rx_length_errors = adapter->stats.rlec;
3169 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
6f11eef7 3170 adapter->net_stats.rx_missed_errors = total_mpc;
9a799d71
AK		 3171}
3172
3173/**
3174 * ixgbe_watchdog - Timer Call-back
3175 * @data: pointer to adapter cast into an unsigned long
3176 **/
3177static void ixgbe_watchdog(unsigned long data)
3178{
3179 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
cf8280ee
JB		 3180 struct ixgbe_hw *hw = &adapter->hw;
3181
3182 /* Do the watchdog outside of interrupt context due to the lovely
3183 * delays that some of the newer hardware requires */
3184 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
3185 /* Cause software interrupt to ensure rx rings are cleaned */
3186 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3187 u32 eics =
3188 (1 << (adapter->num_msix_vectors - NON_Q_VECTORS)) - 1;
3189 IXGBE_WRITE_REG(hw, IXGBE_EICS, eics);
3190 } else {
3191 /* For legacy and MSI interrupts don't set any bits that
3192 * are enabled for EIAM, because this operation would
3193 * set *both* EIMS and EICS for any bit in EIAM */
3194 IXGBE_WRITE_REG(hw, IXGBE_EICS,
3195 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
3196 }
3197 /* Reset the timer */
3198 mod_timer(&adapter->watchdog_timer,
3199 round_jiffies(jiffies + 2 * HZ));
3200 }
9a799d71 3201
cf8280ee
JB		 3202 schedule_work(&adapter->watchdog_task);
3203}
3204
3205/**
69888674
AD		 3206 * ixgbe_watchdog_task - worker thread to bring link up
3207 * @work: pointer to work_struct containing our data
cf8280ee
JB		 3208 **/
3209static void ixgbe_watchdog_task(struct work_struct *work)
3210{
3211 struct ixgbe_adapter *adapter = container_of(work,
3212 struct ixgbe_adapter,
3213 watchdog_task);
3214 struct net_device *netdev = adapter->netdev;
3215 struct ixgbe_hw *hw = &adapter->hw;
3216 u32 link_speed = adapter->link_speed;
3217 bool link_up = adapter->link_up;
3218
3219 adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
3220
3221 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
3222 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
3223 if (link_up ||
3224 time_after(jiffies, (adapter->link_check_timeout +
3225 IXGBE_TRY_LINK_TIMEOUT))) {
3226 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
3227 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
3228 }
3229 adapter->link_up = link_up;
3230 adapter->link_speed = link_speed;
3231 }
9a799d71
AK		 3232
3233 if (link_up) {
3234 if (!netif_carrier_ok(netdev)) {
cf8280ee
JB		 3235 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3236 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
9a799d71
AK		 3237#define FLOW_RX (frctl & IXGBE_FCTRL_RFCE)
3238#define FLOW_TX (rmcs & IXGBE_RMCS_TFCE_802_3X)
3239 DPRINTK(LINK, INFO, "NIC Link is Up %s, "
cf8280ee
JB		 3240 "Flow Control: %s\n",
3241 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
3242 "10 Gbps" :
3243 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
3244 "1 Gbps" : "unknown speed")),
3245 ((FLOW_RX && FLOW_TX) ? "RX/TX" :
3246 (FLOW_RX ? "RX" :
3247 (FLOW_TX ? "TX" : "None"))));
9a799d71
AK		 3248
3249 netif_carrier_on(netdev);
fd2ea0a7 3250 netif_tx_wake_all_queues(netdev);
9a799d71
AK		 3251 } else {
3252 /* Force detection of hung controller */
3253 adapter->detect_tx_hung = true;
3254 }
3255 } else {
cf8280ee
JB		 3256 adapter->link_up = false;
3257 adapter->link_speed = 0;
9a799d71
AK		 3258 if (netif_carrier_ok(netdev)) {
3259 DPRINTK(LINK, INFO, "NIC Link is Down\n");
3260 netif_carrier_off(netdev);
fd2ea0a7 3261 netif_tx_stop_all_queues(netdev);
9a799d71
AK		 3262 }
3263 }
3264
3265 ixgbe_update_stats(adapter);
cf8280ee 3266 adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
9a799d71
AK		 3267}
3268
9a799d71 3269static int ixgbe_tso(struct ixgbe_adapter *adapter,
b4617240
PW		 3270 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
3271 u32 tx_flags, u8 *hdr_len)
9a799d71
AK		 3272{
3273 struct ixgbe_adv_tx_context_desc *context_desc;
3274 unsigned int i;
3275 int err;
3276 struct ixgbe_tx_buffer *tx_buffer_info;
9f8cdf4f
JB		 3277 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
3278 u32 mss_l4len_idx, l4len;
9a799d71
AK		 3279
3280 if (skb_is_gso(skb)) {
3281 if (skb_header_cloned(skb)) {
3282 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
3283 if (err)
3284 return err;
3285 }
3286 l4len = tcp_hdrlen(skb);
3287 *hdr_len += l4len;
3288
8327d000 3289 if (skb->protocol == htons(ETH_P_IP)) {
9a799d71
AK		 3290 struct iphdr *iph = ip_hdr(skb);
3291 iph->tot_len = 0;
3292 iph->check = 0;
3293 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
b4617240
PW		 3294 iph->daddr, 0,
3295 IPPROTO_TCP,
3296 0);
9a799d71
AK		 3297 adapter->hw_tso_ctxt++;
3298 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
3299 ipv6_hdr(skb)->payload_len = 0;
3300 tcp_hdr(skb)->check =
3301 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
b4617240
PW		 3302 &ipv6_hdr(skb)->daddr,
3303 0, IPPROTO_TCP, 0);
9a799d71
AK		 3304 adapter->hw_tso6_ctxt++;
3305 }
3306
3307 i = tx_ring->next_to_use;
3308
3309 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3310 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
3311
3312 /* VLAN MACLEN IPLEN */
3313 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3314 vlan_macip_lens |=
3315 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
3316 vlan_macip_lens |= ((skb_network_offset(skb)) <<
b4617240 3317 IXGBE_ADVTXD_MACLEN_SHIFT);
9a799d71
AK		 3318 *hdr_len += skb_network_offset(skb);
3319 vlan_macip_lens |=
3320 (skb_transport_header(skb) - skb_network_header(skb));
3321 *hdr_len +=
3322 (skb_transport_header(skb) - skb_network_header(skb));
3323 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
3324 context_desc->seqnum_seed = 0;
3325
3326 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
9f8cdf4f 3327 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
b4617240 3328 IXGBE_ADVTXD_DTYP_CTXT);
9a799d71 3329
8327d000 3330 if (skb->protocol == htons(ETH_P_IP))
9a799d71
AK		 3331 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
3332 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
3333 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
3334
3335 /* MSS L4LEN IDX */
9f8cdf4f 3336 mss_l4len_idx =
9a799d71
AK		 3337 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
3338 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
4eeae6fd
PW		 3339 /* use index 1 for TSO */
3340 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
9a799d71
AK		 3341 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
3342
3343 tx_buffer_info->time_stamp = jiffies;
3344 tx_buffer_info->next_to_watch = i;
3345
3346 i++;
3347 if (i == tx_ring->count)
3348 i = 0;
3349 tx_ring->next_to_use = i;
3350
3351 return true;
3352 }
3353 return false;
3354}
3355
3356static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
b4617240
PW		 3357 struct ixgbe_ring *tx_ring,
3358 struct sk_buff *skb, u32 tx_flags)
9a799d71
AK		 3359{
3360 struct ixgbe_adv_tx_context_desc *context_desc;
3361 unsigned int i;
3362 struct ixgbe_tx_buffer *tx_buffer_info;
3363 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
3364
3365 if (skb->ip_summed == CHECKSUM_PARTIAL ||
3366 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
3367 i = tx_ring->next_to_use;
3368 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3369 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
3370
3371 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3372 vlan_macip_lens |=
3373 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
3374 vlan_macip_lens |= (skb_network_offset(skb) <<
b4617240 3375 IXGBE_ADVTXD_MACLEN_SHIFT);
9a799d71
AK		 3376 if (skb->ip_summed == CHECKSUM_PARTIAL)
3377 vlan_macip_lens |= (skb_transport_header(skb) -
b4617240 3378 skb_network_header(skb));
9a799d71
AK		 3379
3380 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
3381 context_desc->seqnum_seed = 0;
3382
3383 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
b4617240 3384 IXGBE_ADVTXD_DTYP_CTXT);
9a799d71
AK		 3385
3386 if (skb->ip_summed == CHECKSUM_PARTIAL) {
41825d71
AK		 3387 switch (skb->protocol) {
3388 case __constant_htons(ETH_P_IP):
9a799d71 3389 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
41825d71
AK		 3390 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
3391 type_tucmd_mlhl |=
b4617240 3392 IXGBE_ADVTXD_TUCMD_L4T_TCP;
41825d71 3393 break;
41825d71
AK		 3394 case __constant_htons(ETH_P_IPV6):
3395 /* XXX what about other V6 headers?? */
3396 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
3397 type_tucmd_mlhl |=
b4617240 3398 IXGBE_ADVTXD_TUCMD_L4T_TCP;
41825d71 3399 break;
41825d71
AK		 3400 default:
3401 if (unlikely(net_ratelimit())) {
3402 DPRINTK(PROBE, WARNING,
3403 "partial checksum but proto=%x!\n",
3404 skb->protocol);
3405 }
3406 break;
3407 }
9a799d71
AK		 3408 }
3409
3410 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4eeae6fd 3411 /* use index zero for tx checksum offload */
9a799d71
AK		 3412 context_desc->mss_l4len_idx = 0;
3413
3414 tx_buffer_info->time_stamp = jiffies;
3415 tx_buffer_info->next_to_watch = i;
9f8cdf4f 3416
9a799d71
AK		 3417 adapter->hw_csum_tx_good++;
3418 i++;
3419 if (i == tx_ring->count)
3420 i = 0;
3421 tx_ring->next_to_use = i;
3422
3423 return true;
3424 }
9f8cdf4f 3425
9a799d71
AK		 3426 return false;
3427}
3428
3429static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
b4617240
PW		 3430 struct ixgbe_ring *tx_ring,
3431 struct sk_buff *skb, unsigned int first)
9a799d71
AK		 3432{
3433 struct ixgbe_tx_buffer *tx_buffer_info;
3434 unsigned int len = skb->len;
3435 unsigned int offset = 0, size, count = 0, i;
3436 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
3437 unsigned int f;
3438
3439 len -= skb->data_len;
3440
3441 i = tx_ring->next_to_use;
3442
3443 while (len) {
3444 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3445 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
3446
3447 tx_buffer_info->length = size;
3448 tx_buffer_info->dma = pci_map_single(adapter->pdev,
b4617240
PW		 3449 skb->data + offset,
3450 size, PCI_DMA_TODEVICE);
9a799d71
AK		 3451 tx_buffer_info->time_stamp = jiffies;
3452 tx_buffer_info->next_to_watch = i;
3453
3454 len -= size;
3455 offset += size;
3456 count++;
3457 i++;
3458 if (i == tx_ring->count)
3459 i = 0;
3460 }
3461
3462 for (f = 0; f < nr_frags; f++) {
3463 struct skb_frag_struct *frag;
3464
3465 frag = &skb_shinfo(skb)->frags[f];
3466 len = frag->size;
3467 offset = frag->page_offset;
3468
3469 while (len) {
3470 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3471 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
3472
3473 tx_buffer_info->length = size;
3474 tx_buffer_info->dma = pci_map_page(adapter->pdev,
b4617240
PW		 3475 frag->page,
3476 offset,
3477 size,
3478 PCI_DMA_TODEVICE);
9a799d71
AK		 3479 tx_buffer_info->time_stamp = jiffies;
3480 tx_buffer_info->next_to_watch = i;
3481
3482 len -= size;
3483 offset += size;
3484 count++;
3485 i++;
3486 if (i == tx_ring->count)
3487 i = 0;
3488 }
3489 }
3490 if (i == 0)
3491 i = tx_ring->count - 1;
3492 else
3493 i = i - 1;
3494 tx_ring->tx_buffer_info[i].skb = skb;
3495 tx_ring->tx_buffer_info[first].next_to_watch = i;
3496
3497 return count;
3498}
3499
3500static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
b4617240
PW		 3501 struct ixgbe_ring *tx_ring,
3502 int tx_flags, int count, u32 paylen, u8 hdr_len)
9a799d71
AK		 3503{
3504 union ixgbe_adv_tx_desc *tx_desc = NULL;
3505 struct ixgbe_tx_buffer *tx_buffer_info;
3506 u32 olinfo_status = 0, cmd_type_len = 0;
3507 unsigned int i;
3508 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
3509
3510 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
3511
3512 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
3513
3514 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3515 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
3516
3517 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
3518 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
3519
3520 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
b4617240 3521 IXGBE_ADVTXD_POPTS_SHIFT;
9a799d71 3522
4eeae6fd
PW		 3523 /* use index 1 context for tso */
3524 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
9a799d71
AK		 3525 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
3526 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
b4617240 3527 IXGBE_ADVTXD_POPTS_SHIFT;
9a799d71
AK		 3528
3529 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
3530 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
b4617240 3531 IXGBE_ADVTXD_POPTS_SHIFT;
9a799d71
AK		 3532
3533 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
3534
3535 i = tx_ring->next_to_use;
3536 while (count--) {
3537 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3538 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
3539 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
3540 tx_desc->read.cmd_type_len =
b4617240 3541 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
9a799d71 3542 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
9a799d71
AK		 3543 i++;
3544 if (i == tx_ring->count)
3545 i = 0;
3546 }
3547
3548 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
3549
3550 /*
3551 * Force memory writes to complete before letting h/w
3552 * know there are new descriptors to fetch. (Only
3553 * applicable for weak-ordered memory model archs,
3554 * such as IA-64).
3555 */
3556 wmb();
3557
3558 tx_ring->next_to_use = i;
3559 writel(i, adapter->hw.hw_addr + tx_ring->tail);
3560}
3561
e092be60 3562static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
b4617240 3563 struct ixgbe_ring *tx_ring, int size)
e092be60
AV		 3564{
3565 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3566
30eba97a 3567 netif_stop_subqueue(netdev, tx_ring->queue_index);
e092be60
AV		 3568 /* Herbert's original patch had:
3569 * smp_mb__after_netif_stop_queue();
3570 * but since that doesn't exist yet, just open code it. */
3571 smp_mb();
3572
3573 /* We need to check again in a case another CPU has just
3574 * made room available. */
3575 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
3576 return -EBUSY;
3577
3578 /* A reprieve! - use start_queue because it doesn't call schedule */
af72166f 3579 netif_start_subqueue(netdev, tx_ring->queue_index);
e092be60
AV		 3580 ++adapter->restart_queue;
3581 return 0;
3582}
3583
3584static int ixgbe_maybe_stop_tx(struct net_device *netdev,
b4617240 3585 struct ixgbe_ring *tx_ring, int size)
e092be60
AV		 3586{
3587 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
3588 return 0;
3589 return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
3590}
3591
9a799d71
AK		 3592static int ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3593{
3594 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3595 struct ixgbe_ring *tx_ring;
9a799d71
AK		 3596 unsigned int first;
3597 unsigned int tx_flags = 0;
30eba97a
AV		 3598 u8 hdr_len = 0;
3599 int r_idx = 0, tso;
9a799d71
AK		 3600 int count = 0;
3601 unsigned int f;
9f8cdf4f 3602
30eba97a 3603 r_idx = (adapter->num_tx_queues - 1) & skb->queue_mapping;
30eba97a 3604 tx_ring = &adapter->tx_ring[r_idx];
9a799d71 3605
9f8cdf4f
JB		 3606 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
3607 tx_flags |= vlan_tx_tag_get(skb);
3608 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
3609 tx_flags |= IXGBE_TX_FLAGS_VLAN;
9a799d71 3610 }
9f8cdf4f
JB		 3611 /* three things can cause us to need a context descriptor */
3612 if (skb_is_gso(skb) ||
3613 (skb->ip_summed == CHECKSUM_PARTIAL) ||
3614 (tx_flags & IXGBE_TX_FLAGS_VLAN))
9a799d71
AK		 3615 count++;
3616
9f8cdf4f
JB		 3617 count += TXD_USE_COUNT(skb_headlen(skb));
3618 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
9a799d71
AK		 3619 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
3620
e092be60 3621 if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
9a799d71 3622 adapter->tx_busy++;
9a799d71
AK		 3623 return NETDEV_TX_BUSY;
3624 }
9a799d71 3625
8327d000 3626 if (skb->protocol == htons(ETH_P_IP))
9a799d71
AK		 3627 tx_flags |= IXGBE_TX_FLAGS_IPV4;
3628 first = tx_ring->next_to_use;
3629 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
3630 if (tso < 0) {
3631 dev_kfree_skb_any(skb);
3632 return NETDEV_TX_OK;
3633 }
3634
3635 if (tso)
3636 tx_flags |= IXGBE_TX_FLAGS_TSO;
3637 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
b4617240 3638 (skb->ip_summed == CHECKSUM_PARTIAL))
9a799d71
AK		 3639 tx_flags |= IXGBE_TX_FLAGS_CSUM;
3640
3641 ixgbe_tx_queue(adapter, tx_ring, tx_flags,
b4617240
PW		 3642 ixgbe_tx_map(adapter, tx_ring, skb, first),
3643 skb->len, hdr_len);
9a799d71
AK		 3644
3645 netdev->trans_start = jiffies;
3646
e092be60 3647 ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
9a799d71
AK		 3648
3649 return NETDEV_TX_OK;
3650}
3651
3652/**
3653 * ixgbe_get_stats - Get System Network Statistics
3654 * @netdev: network interface device structure
3655 *
3656 * Returns the address of the device statistics structure.
3657 * The statistics are actually updated from the timer callback.
3658 **/
3659static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
3660{
3661 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3662
3663 /* only return the current stats */
3664 return &adapter->net_stats;
3665}
3666
3667/**
3668 * ixgbe_set_mac - Change the Ethernet Address of the NIC
3669 * @netdev: network interface device structure
3670 * @p: pointer to an address structure
3671 *
3672 * Returns 0 on success, negative on failure
3673 **/
3674static int ixgbe_set_mac(struct net_device *netdev, void *p)
3675{
3676 struct ixgbe_adapter *adapter = netdev_priv(netdev);
b4617240 3677 struct ixgbe_hw *hw = &adapter->hw;
9a799d71
AK		 3678 struct sockaddr *addr = p;
3679
3680 if (!is_valid_ether_addr(addr->sa_data))
3681 return -EADDRNOTAVAIL;
3682
3683 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
b4617240 3684 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
9a799d71 3685
b4617240 3686 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
9a799d71
AK		 3687
3688 return 0;
3689}
3690
3691#ifdef CONFIG_NET_POLL_CONTROLLER
3692/*
3693 * Polling 'interrupt' - used by things like netconsole to send skbs
3694 * without having to re-enable interrupts. It's not called while
3695 * the interrupt routine is executing.
3696 */
3697static void ixgbe_netpoll(struct net_device *netdev)
3698{
3699 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3700
3701 disable_irq(adapter->pdev->irq);
3702 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
3703 ixgbe_intr(adapter->pdev->irq, netdev);
3704 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
3705 enable_irq(adapter->pdev->irq);
3706}
3707#endif
3708
c44ade9e
JB		 3709/**
3710 * ixgbe_link_config - set up initial link with default speed and duplex
3711 * @hw: pointer to private hardware struct
3712 *
3713 * Returns 0 on success, negative on failure
3714 **/
3715static int ixgbe_link_config(struct ixgbe_hw *hw)
3716{
3717 u32 autoneg = IXGBE_LINK_SPEED_10GB_FULL;
3718
3719 /* must always autoneg for both 1G and 10G link */
3720 hw->mac.autoneg = true;
3721
0befdb3e
JB		 3722 if ((hw->mac.type == ixgbe_mac_82598EB) &&
3723 (hw->phy.media_type == ixgbe_media_type_copper))
3724 autoneg = IXGBE_LINK_SPEED_82598_AUTONEG;
3725
c44ade9e
JB		 3726 return hw->mac.ops.setup_link_speed(hw, autoneg, true, true);
3727}
3728
9a799d71
AK		 3729/**
3730 * ixgbe_probe - Device Initialization Routine
3731 * @pdev: PCI device information struct
3732 * @ent: entry in ixgbe_pci_tbl
3733 *
3734 * Returns 0 on success, negative on failure
3735 *
3736 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
3737 * The OS initialization, configuring of the adapter private structure,
3738 * and a hardware reset occur.
3739 **/
3740static int __devinit ixgbe_probe(struct pci_dev *pdev,
b4617240 3741 const struct pci_device_id *ent)
9a799d71
AK		 3742{
3743 struct net_device *netdev;
3744 struct ixgbe_adapter *adapter = NULL;
3745 struct ixgbe_hw *hw;
3746 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
9a799d71
AK		 3747 static int cards_found;
3748 int i, err, pci_using_dac;
3749 u16 link_status, link_speed, link_width;
c44ade9e 3750 u32 part_num, eec;
9a799d71
AK		 3751
3752 err = pci_enable_device(pdev);
3753 if (err)
3754 return err;
3755
3756 if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK) &&
3757 !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) {
3758 pci_using_dac = 1;
3759 } else {
3760 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
3761 if (err) {
3762 err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
3763 if (err) {
b4617240
PW		 3764 dev_err(&pdev->dev, "No usable DMA "
3765 "configuration, aborting\n");
9a799d71
AK		 3766 goto err_dma;
3767 }
3768 }
3769 pci_using_dac = 0;
3770 }
3771
3772 err = pci_request_regions(pdev, ixgbe_driver_name);
3773 if (err) {
3774 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
3775 goto err_pci_reg;
3776 }
3777
3778 pci_set_master(pdev);
fb3b27bc 3779 pci_save_state(pdev);
9a799d71 3780
30eba97a 3781 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES);
9a799d71
AK		 3782 if (!netdev) {
3783 err = -ENOMEM;
3784 goto err_alloc_etherdev;
3785 }
3786
9a799d71
AK		 3787 SET_NETDEV_DEV(netdev, &pdev->dev);
3788
3789 pci_set_drvdata(pdev, netdev);
3790 adapter = netdev_priv(netdev);
3791
3792 adapter->netdev = netdev;
3793 adapter->pdev = pdev;
3794 hw = &adapter->hw;
3795 hw->back = adapter;
3796 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
3797
05857980
JK		 3798 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
3799 pci_resource_len(pdev, 0));
9a799d71
AK		 3800 if (!hw->hw_addr) {
3801 err = -EIO;
3802 goto err_ioremap;
3803 }
3804
3805 for (i = 1; i <= 5; i++) {
3806 if (pci_resource_len(pdev, i) == 0)
3807 continue;
3808 }
3809
3810 netdev->open = &ixgbe_open;
3811 netdev->stop = &ixgbe_close;
3812 netdev->hard_start_xmit = &ixgbe_xmit_frame;
3813 netdev->get_stats = &ixgbe_get_stats;
2c5645cf
CL		 3814 netdev->set_rx_mode = &ixgbe_set_rx_mode;
3815 netdev->set_multicast_list = &ixgbe_set_rx_mode;
9a799d71
AK		 3816 netdev->set_mac_address = &ixgbe_set_mac;
3817 netdev->change_mtu = &ixgbe_change_mtu;
3818 ixgbe_set_ethtool_ops(netdev);
3819 netdev->tx_timeout = &ixgbe_tx_timeout;
3820 netdev->watchdog_timeo = 5 * HZ;
9a799d71
AK		 3821 netdev->vlan_rx_register = ixgbe_vlan_rx_register;
3822 netdev->vlan_rx_add_vid = ixgbe_vlan_rx_add_vid;
3823 netdev->vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid;
3824#ifdef CONFIG_NET_POLL_CONTROLLER
3825 netdev->poll_controller = ixgbe_netpoll;
3826#endif
3827 strcpy(netdev->name, pci_name(pdev));
3828
9a799d71
AK		 3829 adapter->bd_number = cards_found;
3830
9a799d71
AK		 3831 /* Setup hw api */
3832 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
021230d4 3833 hw->mac.type = ii->mac;
9a799d71 3834
c44ade9e
JB		 3835 /* EEPROM */
3836 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
3837 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
3838 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
3839 if (!(eec & (1 << 8)))
3840 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
3841
3842 /* PHY */
3843 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
3844 /* phy->sfp_type = ixgbe_sfp_type_unknown; */
3845
9a799d71
AK		 3846 err = ii->get_invariants(hw);
3847 if (err)
3848 goto err_hw_init;
3849
3850 /* setup the private structure */
3851 err = ixgbe_sw_init(adapter);
3852 if (err)
3853 goto err_sw_init;
3854
c44ade9e
JB		 3855 /* reset_hw fills in the perm_addr as well */
3856 err = hw->mac.ops.reset_hw(hw);
3857 if (err) {
3858 dev_err(&adapter->pdev->dev, "HW Init failed: %d\n", err);
3859 goto err_sw_init;
3860 }
3861
9a799d71 3862 netdev->features = NETIF_F_SG |
b4617240
PW		 3863 NETIF_F_IP_CSUM |
3864 NETIF_F_HW_VLAN_TX |
3865 NETIF_F_HW_VLAN_RX |
3866 NETIF_F_HW_VLAN_FILTER;
9a799d71 3867
e9990a9c 3868 netdev->features |= NETIF_F_IPV6_CSUM;
9a799d71 3869 netdev->features |= NETIF_F_TSO;
9a799d71 3870 netdev->features |= NETIF_F_TSO6;
e9990a9c 3871 netdev->features |= NETIF_F_LRO;
ad31c402
JK		 3872
3873 netdev->vlan_features |= NETIF_F_TSO;
3874 netdev->vlan_features |= NETIF_F_TSO6;
22f32b7a 3875 netdev->vlan_features |= NETIF_F_IP_CSUM;
ad31c402
JK		 3876 netdev->vlan_features |= NETIF_F_SG;
3877
9a799d71
AK		 3878 if (pci_using_dac)
3879 netdev->features |= NETIF_F_HIGHDMA;
3880
9a799d71 3881 /* make sure the EEPROM is good */
c44ade9e 3882 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
9a799d71
AK		 3883 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
3884 err = -EIO;
3885 goto err_eeprom;
3886 }
3887
3888 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
3889 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
3890
c44ade9e
JB		 3891 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
3892 dev_err(&pdev->dev, "invalid MAC address\n");
9a799d71
AK		 3893 err = -EIO;
3894 goto err_eeprom;
3895 }
3896
3897 init_timer(&adapter->watchdog_timer);
3898 adapter->watchdog_timer.function = &ixgbe_watchdog;
3899 adapter->watchdog_timer.data = (unsigned long)adapter;
3900
3901 INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
cf8280ee 3902 INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
9a799d71 3903
021230d4
AV		 3904 err = ixgbe_init_interrupt_scheme(adapter);
3905 if (err)
3906 goto err_sw_init;
9a799d71
AK		 3907
3908 /* print bus type/speed/width info */
3909 pci_read_config_word(pdev, IXGBE_PCI_LINK_STATUS, &link_status);
3910 link_speed = link_status & IXGBE_PCI_LINK_SPEED;
3911 link_width = link_status & IXGBE_PCI_LINK_WIDTH;
7c510e4b 3912 dev_info(&pdev->dev, "(PCI Express:%s:%s) %pM\n",
b4617240
PW		 3913 ((link_speed == IXGBE_PCI_LINK_SPEED_5000) ? "5.0Gb/s" :
3914 (link_speed == IXGBE_PCI_LINK_SPEED_2500) ? "2.5Gb/s" :
3915 "Unknown"),
3916 ((link_width == IXGBE_PCI_LINK_WIDTH_8) ? "Width x8" :
3917 (link_width == IXGBE_PCI_LINK_WIDTH_4) ? "Width x4" :
3918 (link_width == IXGBE_PCI_LINK_WIDTH_2) ? "Width x2" :
3919 (link_width == IXGBE_PCI_LINK_WIDTH_1) ? "Width x1" :
3920 "Unknown"),
7c510e4b 3921 netdev->dev_addr);
c44ade9e 3922 ixgbe_read_pba_num_generic(hw, &part_num);
9a799d71 3923 dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
b4617240
PW		 3924 hw->mac.type, hw->phy.type,
3925 (part_num >> 8), (part_num & 0xff));
9a799d71 3926
0c254d86
AK		 3927 if (link_width <= IXGBE_PCI_LINK_WIDTH_4) {
3928 dev_warn(&pdev->dev, "PCI-Express bandwidth available for "
b4617240
PW		 3929 "this card is not sufficient for optimal "
3930 "performance.\n");
0c254d86 3931 dev_warn(&pdev->dev, "For optimal performance a x8 "
b4617240 3932 "PCI-Express slot is required.\n");
0c254d86
AK		 3933 }
3934
9a799d71 3935 /* reset the hardware with the new settings */
c44ade9e
JB		 3936 hw->mac.ops.start_hw(hw);
3937
3938 /* link_config depends on start_hw being called at least once */
3939 err = ixgbe_link_config(hw);
3940 if (err) {
3941 dev_err(&pdev->dev, "setup_link_speed FAILED %d\n", err);
3942 goto err_register;
3943 }
9a799d71
AK		 3944
3945 netif_carrier_off(netdev);
fd2ea0a7 3946 netif_tx_stop_all_queues(netdev);
9a799d71 3947
021230d4
AV		 3948 ixgbe_napi_add_all(adapter);
3949
9a799d71
AK		 3950 strcpy(netdev->name, "eth%d");
3951 err = register_netdev(netdev);
3952 if (err)
3953 goto err_register;
3954
5dd2d332 3955#ifdef CONFIG_IXGBE_DCA
652f093f 3956 if (dca_add_requester(&pdev->dev) == 0) {
bd0362dd
JC		 3957 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
3958 /* always use CB2 mode, difference is masked
3959 * in the CB driver */
3960 IXGBE_WRITE_REG(hw, IXGBE_DCA_CTRL, 2);
3961 ixgbe_setup_dca(adapter);
3962 }
3963#endif
9a799d71
AK		 3964
3965 dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
3966 cards_found++;
3967 return 0;
3968
3969err_register:
5eba3699 3970 ixgbe_release_hw_control(adapter);
9a799d71
AK		 3971err_hw_init:
3972err_sw_init:
021230d4 3973 ixgbe_reset_interrupt_capability(adapter);
9a799d71
AK		 3974err_eeprom:
3975 iounmap(hw->hw_addr);
3976err_ioremap:
3977 free_netdev(netdev);
3978err_alloc_etherdev:
3979 pci_release_regions(pdev);
3980err_pci_reg:
3981err_dma:
3982 pci_disable_device(pdev);
3983 return err;
3984}
3985
3986/**
3987 * ixgbe_remove - Device Removal Routine
3988 * @pdev: PCI device information struct
3989 *
3990 * ixgbe_remove is called by the PCI subsystem to alert the driver
3991 * that it should release a PCI device. The could be caused by a
3992 * Hot-Plug event, or because the driver is going to be removed from
3993 * memory.
3994 **/
3995static void __devexit ixgbe_remove(struct pci_dev *pdev)
3996{
3997 struct net_device *netdev = pci_get_drvdata(pdev);
3998 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3999
4000 set_bit(__IXGBE_DOWN, &adapter->state);
4001 del_timer_sync(&adapter->watchdog_timer);
4002
4003 flush_scheduled_work();
4004
5dd2d332 4005#ifdef CONFIG_IXGBE_DCA
bd0362dd
JC		 4006 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
4007 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
4008 dca_remove_requester(&pdev->dev);
4009 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
4010 }
4011
4012#endif
9a799d71
AK		 4013 unregister_netdev(netdev);
4014
021230d4 4015 ixgbe_reset_interrupt_capability(adapter);
5eba3699 4016
021230d4 4017 ixgbe_release_hw_control(adapter);
9a799d71
AK		 4018
4019 iounmap(adapter->hw.hw_addr);
4020 pci_release_regions(pdev);
4021
021230d4 4022 DPRINTK(PROBE, INFO, "complete\n");
b3c8b4ba 4023 ixgbe_napi_del_all(adapter);
021230d4
AV		 4024 kfree(adapter->tx_ring);
4025 kfree(adapter->rx_ring);
4026
9a799d71
AK		 4027 free_netdev(netdev);
4028
4029 pci_disable_device(pdev);
4030}
4031
4032/**
4033 * ixgbe_io_error_detected - called when PCI error is detected
4034 * @pdev: Pointer to PCI device
4035 * @state: The current pci connection state
4036 *
4037 * This function is called after a PCI bus error affecting
4038 * this device has been detected.
4039 */
4040static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
b4617240 4041 pci_channel_state_t state)
9a799d71
AK		 4042{
4043 struct net_device *netdev = pci_get_drvdata(pdev);
4044 struct ixgbe_adapter *adapter = netdev->priv;
4045
4046 netif_device_detach(netdev);
4047
4048 if (netif_running(netdev))
4049 ixgbe_down(adapter);
4050 pci_disable_device(pdev);
4051
b4617240 4052 /* Request a slot reset. */
9a799d71
AK		 4053 return PCI_ERS_RESULT_NEED_RESET;
4054}
4055
4056/**
4057 * ixgbe_io_slot_reset - called after the pci bus has been reset.
4058 * @pdev: Pointer to PCI device
4059 *
4060 * Restart the card from scratch, as if from a cold-boot.
4061 */
4062static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
4063{
4064 struct net_device *netdev = pci_get_drvdata(pdev);
4065 struct ixgbe_adapter *adapter = netdev->priv;
4066
4067 if (pci_enable_device(pdev)) {
4068 DPRINTK(PROBE, ERR,
b4617240 4069 "Cannot re-enable PCI device after reset.\n");
9a799d71
AK		 4070 return PCI_ERS_RESULT_DISCONNECT;
4071 }
4072 pci_set_master(pdev);
fb3b27bc 4073 pci_restore_state(pdev);
9a799d71
AK		 4074
4075 pci_enable_wake(pdev, PCI_D3hot, 0);
4076 pci_enable_wake(pdev, PCI_D3cold, 0);
4077
4078 ixgbe_reset(adapter);
4079
4080 return PCI_ERS_RESULT_RECOVERED;
4081}
4082
4083/**
4084 * ixgbe_io_resume - called when traffic can start flowing again.
4085 * @pdev: Pointer to PCI device
4086 *
4087 * This callback is called when the error recovery driver tells us that
4088 * its OK to resume normal operation.
4089 */
4090static void ixgbe_io_resume(struct pci_dev *pdev)
4091{
4092 struct net_device *netdev = pci_get_drvdata(pdev);
4093 struct ixgbe_adapter *adapter = netdev->priv;
4094
4095 if (netif_running(netdev)) {
4096 if (ixgbe_up(adapter)) {
4097 DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
4098 return;
4099 }
4100 }
4101
4102 netif_device_attach(netdev);
9a799d71
AK		 4103}
4104
4105static struct pci_error_handlers ixgbe_err_handler = {
4106 .error_detected = ixgbe_io_error_detected,
4107 .slot_reset = ixgbe_io_slot_reset,
4108 .resume = ixgbe_io_resume,
4109};
4110
4111static struct pci_driver ixgbe_driver = {
4112 .name = ixgbe_driver_name,
4113 .id_table = ixgbe_pci_tbl,
4114 .probe = ixgbe_probe,
4115 .remove = __devexit_p(ixgbe_remove),
4116#ifdef CONFIG_PM
4117 .suspend = ixgbe_suspend,
4118 .resume = ixgbe_resume,
4119#endif
4120 .shutdown = ixgbe_shutdown,
4121 .err_handler = &ixgbe_err_handler
4122};
4123
4124/**
4125 * ixgbe_init_module - Driver Registration Routine
4126 *
4127 * ixgbe_init_module is the first routine called when the driver is
4128 * loaded. All it does is register with the PCI subsystem.
4129 **/
4130static int __init ixgbe_init_module(void)
4131{
4132 int ret;
4133 printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
4134 ixgbe_driver_string, ixgbe_driver_version);
4135
4136 printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
4137
5dd2d332 4138#ifdef CONFIG_IXGBE_DCA
bd0362dd 4139 dca_register_notify(&dca_notifier);
bd0362dd 4140#endif
5dd2d332 4141
9a799d71
AK		 4142 ret = pci_register_driver(&ixgbe_driver);
4143 return ret;
4144}
b4617240 4145
9a799d71
AK		 4146module_init(ixgbe_init_module);
4147
4148/**
4149 * ixgbe_exit_module - Driver Exit Cleanup Routine
4150 *
4151 * ixgbe_exit_module is called just before the driver is removed
4152 * from memory.
4153 **/
4154static void __exit ixgbe_exit_module(void)
4155{
5dd2d332 4156#ifdef CONFIG_IXGBE_DCA
bd0362dd
JC		 4157 dca_unregister_notify(&dca_notifier);
4158#endif
9a799d71
AK		 4159 pci_unregister_driver(&ixgbe_driver);
4160}
bd0362dd 4161
5dd2d332 4162#ifdef CONFIG_IXGBE_DCA
bd0362dd 4163static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
b4617240 4164 void *p)
bd0362dd
JC		 4165{
4166 int ret_val;
4167
4168 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
b4617240 4169 __ixgbe_notify_dca);
bd0362dd
JC		 4170
4171 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
4172}
5dd2d332 4173#endif /* CONFIG_IXGBE_DCA */
bd0362dd 4174
9a799d71
AK		 4175module_exit(ixgbe_exit_module);
4176
4177/* ixgbe_main.c */
Linux 6.x block layer and io_uring tree(s)