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wl1251: use wiphy_dev instead of wl->spi->dev
[linux/fpc-iii.git] / drivers / net / ixgbe / ixgbe_main.c
blob71df9ed9b53497b6e8802f7329c9649e5e6348d7
1 /*******************************************************************************
2
3 Intel 10 Gigabit PCI Express Linux driver
4 Copyright(c) 1999 - 2009 Intel Corporation.
5
6 This program is free software; you can redistribute it and/or modify it
7 under the terms and conditions of the GNU General Public License,
8 version 2, as published by the Free Software Foundation.
9
10 This program is distributed in the hope it will be useful, but WITHOUT
11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 more details.
14
15 You should have received a copy of the GNU General Public License along with
16 this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19 The full GNU General Public License is included in this distribution in
20 the file called "COPYING".
21
22 Contact Information:
23 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
24 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
25
26 *******************************************************************************/
27
28 #include <linux/types.h>
29 #include <linux/module.h>
30 #include <linux/pci.h>
31 #include <linux/netdevice.h>
32 #include <linux/vmalloc.h>
33 #include <linux/string.h>
34 #include <linux/in.h>
35 #include <linux/ip.h>
36 #include <linux/tcp.h>
37 #include <linux/pkt_sched.h>
38 #include <linux/ipv6.h>
39 #include <net/checksum.h>
40 #include <net/ip6_checksum.h>
41 #include <linux/ethtool.h>
42 #include <linux/if_vlan.h>
43 #include <scsi/fc/fc_fcoe.h>
44
45 #include "ixgbe.h"
46 #include "ixgbe_common.h"
47
48 char ixgbe_driver_name[] = "ixgbe";
49 static const char ixgbe_driver_string[] =
50 "Intel(R) 10 Gigabit PCI Express Network Driver";
51
52 #define DRV_VERSION "2.0.37-k2"
53 const char ixgbe_driver_version[] = DRV_VERSION;
54 static char ixgbe_copyright[] = "Copyright (c) 1999-2009 Intel Corporation.";
55
56 static const struct ixgbe_info *ixgbe_info_tbl[] = {
57 [board_82598] = &ixgbe_82598_info,
58 [board_82599] = &ixgbe_82599_info,
59 };
60
61 /* ixgbe_pci_tbl - PCI Device ID Table
62 *
63 * Wildcard entries (PCI_ANY_ID) should come last
64 * Last entry must be all 0s
65 *
66 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
67 * Class, Class Mask, private data (not used) }
68 */
69 static struct pci_device_id ixgbe_pci_tbl[] = {
70 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598),
71 board_82598 },
72 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
73 board_82598 },
74 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
75 board_82598 },
76 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT),
77 board_82598 },
78 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2),
79 board_82598 },
80 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
81 board_82598 },
82 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT),
83 board_82598 },
84 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT),
85 board_82598 },
86 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM),
87 board_82598 },
88 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR),
89 board_82598 },
90 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM),
91 board_82598 },
92 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX),
93 board_82598 },
94 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4),
95 board_82599 },
96 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM),
97 board_82599 },
98 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP),
99 board_82599 },
100
101 /* required last entry */
102 {0, }
103 };
104 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
105
106 #ifdef CONFIG_IXGBE_DCA
107 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
108 void *p);
109 static struct notifier_block dca_notifier = {
110 .notifier_call = ixgbe_notify_dca,
111 .next = NULL,
112 .priority = 0
113 };
114 #endif
115
116 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
117 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
118 MODULE_LICENSE("GPL");
119 MODULE_VERSION(DRV_VERSION);
120
121 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
122
123 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
124 {
125 u32 ctrl_ext;
126
127 /* Let firmware take over control of h/w */
128 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
129 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
130 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
131 }
132
133 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
134 {
135 u32 ctrl_ext;
136
137 /* Let firmware know the driver has taken over */
138 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
139 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
140 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
141 }
142
143 /*
144 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
145 * @adapter: pointer to adapter struct
146 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
147 * @queue: queue to map the corresponding interrupt to
148 * @msix_vector: the vector to map to the corresponding queue
149 *
150 */
151 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
152 u8 queue, u8 msix_vector)
153 {
154 u32 ivar, index;
155 struct ixgbe_hw *hw = &adapter->hw;
156 switch (hw->mac.type) {
157 case ixgbe_mac_82598EB:
158 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
159 if (direction == -1)
160 direction = 0;
161 index = (((direction * 64) + queue) >> 2) & 0x1F;
162 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
163 ivar &= ~(0xFF << (8 * (queue & 0x3)));
164 ivar |= (msix_vector << (8 * (queue & 0x3)));
165 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
166 break;
167 case ixgbe_mac_82599EB:
168 if (direction == -1) {
169 /* other causes */
170 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
171 index = ((queue & 1) * 8);
172 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
173 ivar &= ~(0xFF << index);
174 ivar |= (msix_vector << index);
175 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
176 break;
177 } else {
178 /* tx or rx causes */
179 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
180 index = ((16 * (queue & 1)) + (8 * direction));
181 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
182 ivar &= ~(0xFF << index);
183 ivar |= (msix_vector << index);
184 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
185 break;
186 }
187 default:
188 break;
189 }
190 }
191
192 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
193 u64 qmask)
194 {
195 u32 mask;
196
197 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
198 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
199 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
200 } else {
201 mask = (qmask & 0xFFFFFFFF);
202 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
203 mask = (qmask >> 32);
204 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
205 }
206 }
207
208 static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
209 struct ixgbe_tx_buffer
210 *tx_buffer_info)
211 {
212 tx_buffer_info->dma = 0;
213 if (tx_buffer_info->skb) {
214 skb_dma_unmap(&adapter->pdev->dev, tx_buffer_info->skb,
215 DMA_TO_DEVICE);
216 dev_kfree_skb_any(tx_buffer_info->skb);
217 tx_buffer_info->skb = NULL;
218 }
219 tx_buffer_info->time_stamp = 0;
220 /* tx_buffer_info must be completely set up in the transmit path */
221 }
222
223 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
224 struct ixgbe_ring *tx_ring,
225 unsigned int eop)
226 {
227 struct ixgbe_hw *hw = &adapter->hw;
228
229 /* Detect a transmit hang in hardware, this serializes the
230 * check with the clearing of time_stamp and movement of eop */
231 adapter->detect_tx_hung = false;
232 if (tx_ring->tx_buffer_info[eop].time_stamp &&
233 time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
234 !(IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & IXGBE_TFCS_TXOFF)) {
235 /* detected Tx unit hang */
236 union ixgbe_adv_tx_desc *tx_desc;
237 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
238 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
239 " Tx Queue <%d>\n"
240 " TDH, TDT <%x>, <%x>\n"
241 " next_to_use <%x>\n"
242 " next_to_clean <%x>\n"
243 "tx_buffer_info[next_to_clean]\n"
244 " time_stamp <%lx>\n"
245 " jiffies <%lx>\n",
246 tx_ring->queue_index,
247 IXGBE_READ_REG(hw, tx_ring->head),
248 IXGBE_READ_REG(hw, tx_ring->tail),
249 tx_ring->next_to_use, eop,
250 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
251 return true;
252 }
253
254 return false;
255 }
256
257 #define IXGBE_MAX_TXD_PWR 14
258 #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
259
260 /* Tx Descriptors needed, worst case */
261 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
262 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
263 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
264 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
265
266 static void ixgbe_tx_timeout(struct net_device *netdev);
267
268 /**
269 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
270 * @q_vector: structure containing interrupt and ring information
271 * @tx_ring: tx ring to clean
272 **/
273 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
274 struct ixgbe_ring *tx_ring)
275 {
276 struct ixgbe_adapter *adapter = q_vector->adapter;
277 struct net_device *netdev = adapter->netdev;
278 union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
279 struct ixgbe_tx_buffer *tx_buffer_info;
280 unsigned int i, eop, count = 0;
281 unsigned int total_bytes = 0, total_packets = 0;
282
283 i = tx_ring->next_to_clean;
284 eop = tx_ring->tx_buffer_info[i].next_to_watch;
285 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
286
287 while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
288 (count < tx_ring->work_limit)) {
289 bool cleaned = false;
290 for ( ; !cleaned; count++) {
291 struct sk_buff *skb;
292 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
293 tx_buffer_info = &tx_ring->tx_buffer_info[i];
294 cleaned = (i == eop);
295 skb = tx_buffer_info->skb;
296
297 if (cleaned && skb) {
298 unsigned int segs, bytecount;
299 unsigned int hlen = skb_headlen(skb);
300
301 /* gso_segs is currently only valid for tcp */
302 segs = skb_shinfo(skb)->gso_segs ?: 1;
303 #ifdef IXGBE_FCOE
304 /* adjust for FCoE Sequence Offload */
305 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
306 && (skb->protocol == htons(ETH_P_FCOE)) &&
307 skb_is_gso(skb)) {
308 hlen = skb_transport_offset(skb) +
309 sizeof(struct fc_frame_header) +
310 sizeof(struct fcoe_crc_eof);
311 segs = DIV_ROUND_UP(skb->len - hlen,
312 skb_shinfo(skb)->gso_size);
313 }
314 #endif /* IXGBE_FCOE */
315 /* multiply data chunks by size of headers */
316 bytecount = ((segs - 1) * hlen) + skb->len;
317 total_packets += segs;
318 total_bytes += bytecount;
319 }
320
321 ixgbe_unmap_and_free_tx_resource(adapter,
322 tx_buffer_info);
323
324 tx_desc->wb.status = 0;
325
326 i++;
327 if (i == tx_ring->count)
328 i = 0;
329 }
330
331 eop = tx_ring->tx_buffer_info[i].next_to_watch;
332 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
333 }
334
335 tx_ring->next_to_clean = i;
336
337 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
338 if (unlikely(count && netif_carrier_ok(netdev) &&
339 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
340 /* Make sure that anybody stopping the queue after this
341 * sees the new next_to_clean.
342 */
343 smp_mb();
344 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
345 !test_bit(__IXGBE_DOWN, &adapter->state)) {
346 netif_wake_subqueue(netdev, tx_ring->queue_index);
347 ++adapter->restart_queue;
348 }
349 }
350
351 if (adapter->detect_tx_hung) {
352 if (ixgbe_check_tx_hang(adapter, tx_ring, i)) {
353 /* schedule immediate reset if we believe we hung */
354 DPRINTK(PROBE, INFO,
355 "tx hang %d detected, resetting adapter\n",
356 adapter->tx_timeout_count + 1);
357 ixgbe_tx_timeout(adapter->netdev);
358 }
359 }
360
361 /* re-arm the interrupt */
362 if (count >= tx_ring->work_limit)
363 ixgbe_irq_rearm_queues(adapter, ((u64)1 << q_vector->v_idx));
364
365 tx_ring->total_bytes += total_bytes;
366 tx_ring->total_packets += total_packets;
367 tx_ring->stats.packets += total_packets;
368 tx_ring->stats.bytes += total_bytes;
369 adapter->net_stats.tx_bytes += total_bytes;
370 adapter->net_stats.tx_packets += total_packets;
371 return (count < tx_ring->work_limit);
372 }
373
374 #ifdef CONFIG_IXGBE_DCA
375 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
376 struct ixgbe_ring *rx_ring)
377 {
378 u32 rxctrl;
379 int cpu = get_cpu();
380 int q = rx_ring - adapter->rx_ring;
381
382 if (rx_ring->cpu != cpu) {
383 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
384 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
385 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
386 rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
387 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
388 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
389 rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
390 IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
391 }
392 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
393 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
394 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
395 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_WRO_EN |
396 IXGBE_DCA_RXCTRL_DESC_HSRO_EN);
397 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
398 rx_ring->cpu = cpu;
399 }
400 put_cpu();
401 }
402
403 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
404 struct ixgbe_ring *tx_ring)
405 {
406 u32 txctrl;
407 int cpu = get_cpu();
408 int q = tx_ring - adapter->tx_ring;
409
410 if (tx_ring->cpu != cpu) {
411 txctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q));
412 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
413 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
414 txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
415 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
416 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
417 txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
418 IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
419 }
420 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
421 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q), txctrl);
422 tx_ring->cpu = cpu;
423 }
424 put_cpu();
425 }
426
427 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
428 {
429 int i;
430
431 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
432 return;
433
434 /* always use CB2 mode, difference is masked in the CB driver */
435 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
436
437 for (i = 0; i < adapter->num_tx_queues; i++) {
438 adapter->tx_ring[i].cpu = -1;
439 ixgbe_update_tx_dca(adapter, &adapter->tx_ring[i]);
440 }
441 for (i = 0; i < adapter->num_rx_queues; i++) {
442 adapter->rx_ring[i].cpu = -1;
443 ixgbe_update_rx_dca(adapter, &adapter->rx_ring[i]);
444 }
445 }
446
447 static int __ixgbe_notify_dca(struct device *dev, void *data)
448 {
449 struct net_device *netdev = dev_get_drvdata(dev);
450 struct ixgbe_adapter *adapter = netdev_priv(netdev);
451 unsigned long event = *(unsigned long *)data;
452
453 switch (event) {
454 case DCA_PROVIDER_ADD:
455 /* if we're already enabled, don't do it again */
456 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
457 break;
458 if (dca_add_requester(dev) == 0) {
459 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
460 ixgbe_setup_dca(adapter);
461 break;
462 }
463 /* Fall Through since DCA is disabled. */
464 case DCA_PROVIDER_REMOVE:
465 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
466 dca_remove_requester(dev);
467 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
468 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
469 }
470 break;
471 }
472
473 return 0;
474 }
475
476 #endif /* CONFIG_IXGBE_DCA */
477 /**
478 * ixgbe_receive_skb - Send a completed packet up the stack
479 * @adapter: board private structure
480 * @skb: packet to send up
481 * @status: hardware indication of status of receive
482 * @rx_ring: rx descriptor ring (for a specific queue) to setup
483 * @rx_desc: rx descriptor
484 **/
485 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
486 struct sk_buff *skb, u8 status,
487 struct ixgbe_ring *ring,
488 union ixgbe_adv_rx_desc *rx_desc)
489 {
490 struct ixgbe_adapter *adapter = q_vector->adapter;
491 struct napi_struct *napi = &q_vector->napi;
492 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
493 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
494
495 skb_record_rx_queue(skb, ring->queue_index);
496 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
497 if (adapter->vlgrp && is_vlan && (tag != 0))
498 vlan_gro_receive(napi, adapter->vlgrp, tag, skb);
499 else
500 napi_gro_receive(napi, skb);
501 } else {
502 if (adapter->vlgrp && is_vlan && (tag != 0))
503 vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
504 else
505 netif_rx(skb);
506 }
507 }
508
509 /**
510 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
511 * @adapter: address of board private structure
512 * @status_err: hardware indication of status of receive
513 * @skb: skb currently being received and modified
514 **/
515 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
516 union ixgbe_adv_rx_desc *rx_desc,
517 struct sk_buff *skb)
518 {
519 u32 status_err = le32_to_cpu(rx_desc->wb.upper.status_error);
520
521 skb->ip_summed = CHECKSUM_NONE;
522
523 /* Rx csum disabled */
524 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
525 return;
526
527 /* if IP and error */
528 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
529 (status_err & IXGBE_RXDADV_ERR_IPE)) {
530 adapter->hw_csum_rx_error++;
531 return;
532 }
533
534 if (!(status_err & IXGBE_RXD_STAT_L4CS))
535 return;
536
537 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
538 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
539
540 /*
541 * 82599 errata, UDP frames with a 0 checksum can be marked as
542 * checksum errors.
543 */
544 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
545 (adapter->hw.mac.type == ixgbe_mac_82599EB))
546 return;
547
548 adapter->hw_csum_rx_error++;
549 return;
550 }
551
552 /* It must be a TCP or UDP packet with a valid checksum */
553 skb->ip_summed = CHECKSUM_UNNECESSARY;
554 adapter->hw_csum_rx_good++;
555 }
556
557 static inline void ixgbe_release_rx_desc(struct ixgbe_hw *hw,
558 struct ixgbe_ring *rx_ring, u32 val)
559 {
560 /*
561 * Force memory writes to complete before letting h/w
562 * know there are new descriptors to fetch. (Only
563 * applicable for weak-ordered memory model archs,
564 * such as IA-64).
565 */
566 wmb();
567 IXGBE_WRITE_REG(hw, IXGBE_RDT(rx_ring->reg_idx), val);
568 }
569
570 /**
571 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
572 * @adapter: address of board private structure
573 **/
574 static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
575 struct ixgbe_ring *rx_ring,
576 int cleaned_count)
577 {
578 struct pci_dev *pdev = adapter->pdev;
579 union ixgbe_adv_rx_desc *rx_desc;
580 struct ixgbe_rx_buffer *bi;
581 unsigned int i;
582
583 i = rx_ring->next_to_use;
584 bi = &rx_ring->rx_buffer_info[i];
585
586 while (cleaned_count--) {
587 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
588
589 if (!bi->page_dma &&
590 (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)) {
591 if (!bi->page) {
592 bi->page = alloc_page(GFP_ATOMIC);
593 if (!bi->page) {
594 adapter->alloc_rx_page_failed++;
595 goto no_buffers;
596 }
597 bi->page_offset = 0;
598 } else {
599 /* use a half page if we're re-using */
600 bi->page_offset ^= (PAGE_SIZE / 2);
601 }
602
603 bi->page_dma = pci_map_page(pdev, bi->page,
604 bi->page_offset,
605 (PAGE_SIZE / 2),
606 PCI_DMA_FROMDEVICE);
607 }
608
609 if (!bi->skb) {
610 struct sk_buff *skb;
611 skb = netdev_alloc_skb(adapter->netdev,
612 (rx_ring->rx_buf_len +
613 NET_IP_ALIGN));
614
615 if (!skb) {
616 adapter->alloc_rx_buff_failed++;
617 goto no_buffers;
618 }
619
620 /*
621 * Make buffer alignment 2 beyond a 16 byte boundary
622 * this will result in a 16 byte aligned IP header after
623 * the 14 byte MAC header is removed
624 */
625 skb_reserve(skb, NET_IP_ALIGN);
626
627 bi->skb = skb;
628 bi->dma = pci_map_single(pdev, skb->data,
629 rx_ring->rx_buf_len,
630 PCI_DMA_FROMDEVICE);
631 }
632 /* Refresh the desc even if buffer_addrs didn't change because
633 * each write-back erases this info. */
634 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
635 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
636 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
637 } else {
638 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
639 }
640
641 i++;
642 if (i == rx_ring->count)
643 i = 0;
644 bi = &rx_ring->rx_buffer_info[i];
645 }
646
647 no_buffers:
648 if (rx_ring->next_to_use != i) {
649 rx_ring->next_to_use = i;
650 if (i-- == 0)
651 i = (rx_ring->count - 1);
652
653 ixgbe_release_rx_desc(&adapter->hw, rx_ring, i);
654 }
655 }
656
657 static inline u16 ixgbe_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
658 {
659 return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
660 }
661
662 static inline u16 ixgbe_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
663 {
664 return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
665 }
666
667 static inline u32 ixgbe_get_rsc_count(union ixgbe_adv_rx_desc *rx_desc)
668 {
669 return (le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
670 IXGBE_RXDADV_RSCCNT_MASK) >>
671 IXGBE_RXDADV_RSCCNT_SHIFT;
672 }
673
674 /**
675 * ixgbe_transform_rsc_queue - change rsc queue into a full packet
676 * @skb: pointer to the last skb in the rsc queue
677 *
678 * This function changes a queue full of hw rsc buffers into a completed
679 * packet. It uses the ->prev pointers to find the first packet and then
680 * turns it into the frag list owner.
681 **/
682 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb)
683 {
684 unsigned int frag_list_size = 0;
685
686 while (skb->prev) {
687 struct sk_buff *prev = skb->prev;
688 frag_list_size += skb->len;
689 skb->prev = NULL;
690 skb = prev;
691 }
692
693 skb_shinfo(skb)->frag_list = skb->next;
694 skb->next = NULL;
695 skb->len += frag_list_size;
696 skb->data_len += frag_list_size;
697 skb->truesize += frag_list_size;
698 return skb;
699 }
700
701 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
702 struct ixgbe_ring *rx_ring,
703 int *work_done, int work_to_do)
704 {
705 struct ixgbe_adapter *adapter = q_vector->adapter;
706 struct pci_dev *pdev = adapter->pdev;
707 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
708 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
709 struct sk_buff *skb;
710 unsigned int i, rsc_count = 0;
711 u32 len, staterr;
712 u16 hdr_info;
713 bool cleaned = false;
714 int cleaned_count = 0;
715 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
716 #ifdef IXGBE_FCOE
717 int ddp_bytes = 0;
718 #endif /* IXGBE_FCOE */
719
720 i = rx_ring->next_to_clean;
721 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
722 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
723 rx_buffer_info = &rx_ring->rx_buffer_info[i];
724
725 while (staterr & IXGBE_RXD_STAT_DD) {
726 u32 upper_len = 0;
727 if (*work_done >= work_to_do)
728 break;
729 (*work_done)++;
730
731 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
732 hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
733 len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
734 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
735 if (hdr_info & IXGBE_RXDADV_SPH)
736 adapter->rx_hdr_split++;
737 if (len > IXGBE_RX_HDR_SIZE)
738 len = IXGBE_RX_HDR_SIZE;
739 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
740 } else {
741 len = le16_to_cpu(rx_desc->wb.upper.length);
742 }
743
744 cleaned = true;
745 skb = rx_buffer_info->skb;
746 prefetch(skb->data - NET_IP_ALIGN);
747 rx_buffer_info->skb = NULL;
748
749 if (rx_buffer_info->dma) {
750 pci_unmap_single(pdev, rx_buffer_info->dma,
751 rx_ring->rx_buf_len,
752 PCI_DMA_FROMDEVICE);
753 rx_buffer_info->dma = 0;
754 skb_put(skb, len);
755 }
756
757 if (upper_len) {
758 pci_unmap_page(pdev, rx_buffer_info->page_dma,
759 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
760 rx_buffer_info->page_dma = 0;
761 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
762 rx_buffer_info->page,
763 rx_buffer_info->page_offset,
764 upper_len);
765
766 if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
767 (page_count(rx_buffer_info->page) != 1))
768 rx_buffer_info->page = NULL;
769 else
770 get_page(rx_buffer_info->page);
771
772 skb->len += upper_len;
773 skb->data_len += upper_len;
774 skb->truesize += upper_len;
775 }
776
777 i++;
778 if (i == rx_ring->count)
779 i = 0;
780
781 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
782 prefetch(next_rxd);
783 cleaned_count++;
784
785 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
786 rsc_count = ixgbe_get_rsc_count(rx_desc);
787
788 if (rsc_count) {
789 u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
790 IXGBE_RXDADV_NEXTP_SHIFT;
791 next_buffer = &rx_ring->rx_buffer_info[nextp];
792 rx_ring->rsc_count += (rsc_count - 1);
793 } else {
794 next_buffer = &rx_ring->rx_buffer_info[i];
795 }
796
797 if (staterr & IXGBE_RXD_STAT_EOP) {
798 if (skb->prev)
799 skb = ixgbe_transform_rsc_queue(skb);
800 rx_ring->stats.packets++;
801 rx_ring->stats.bytes += skb->len;
802 } else {
803 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
804 rx_buffer_info->skb = next_buffer->skb;
805 rx_buffer_info->dma = next_buffer->dma;
806 next_buffer->skb = skb;
807 next_buffer->dma = 0;
808 } else {
809 skb->next = next_buffer->skb;
810 skb->next->prev = skb;
811 }
812 adapter->non_eop_descs++;
813 goto next_desc;
814 }
815
816 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
817 dev_kfree_skb_irq(skb);
818 goto next_desc;
819 }
820
821 ixgbe_rx_checksum(adapter, rx_desc, skb);
822
823 /* probably a little skewed due to removing CRC */
824 total_rx_bytes += skb->len;
825 total_rx_packets++;
826
827 skb->protocol = eth_type_trans(skb, adapter->netdev);
828 #ifdef IXGBE_FCOE
829 /* if ddp, not passing to ULD unless for FCP_RSP or error */
830 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
831 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
832 if (!ddp_bytes)
833 goto next_desc;
834 }
835 #endif /* IXGBE_FCOE */
836 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
837
838 next_desc:
839 rx_desc->wb.upper.status_error = 0;
840
841 /* return some buffers to hardware, one at a time is too slow */
842 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
843 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
844 cleaned_count = 0;
845 }
846
847 /* use prefetched values */
848 rx_desc = next_rxd;
849 rx_buffer_info = &rx_ring->rx_buffer_info[i];
850
851 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
852 }
853
854 rx_ring->next_to_clean = i;
855 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
856
857 if (cleaned_count)
858 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
859
860 #ifdef IXGBE_FCOE
861 /* include DDPed FCoE data */
862 if (ddp_bytes > 0) {
863 unsigned int mss;
864
865 mss = adapter->netdev->mtu - sizeof(struct fcoe_hdr) -
866 sizeof(struct fc_frame_header) -
867 sizeof(struct fcoe_crc_eof);
868 if (mss > 512)
869 mss &= ~511;
870 total_rx_bytes += ddp_bytes;
871 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
872 }
873 #endif /* IXGBE_FCOE */
874
875 rx_ring->total_packets += total_rx_packets;
876 rx_ring->total_bytes += total_rx_bytes;
877 adapter->net_stats.rx_bytes += total_rx_bytes;
878 adapter->net_stats.rx_packets += total_rx_packets;
879
880 return cleaned;
881 }
882
883 static int ixgbe_clean_rxonly(struct napi_struct *, int);
884 /**
885 * ixgbe_configure_msix - Configure MSI-X hardware
886 * @adapter: board private structure
887 *
888 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
889 * interrupts.
890 **/
891 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
892 {
893 struct ixgbe_q_vector *q_vector;
894 int i, j, q_vectors, v_idx, r_idx;
895 u32 mask;
896
897 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
898
899 /*
900 * Populate the IVAR table and set the ITR values to the
901 * corresponding register.
902 */
903 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
904 q_vector = adapter->q_vector[v_idx];
905 /* XXX for_each_bit(...) */
906 r_idx = find_first_bit(q_vector->rxr_idx,
907 adapter->num_rx_queues);
908
909 for (i = 0; i < q_vector->rxr_count; i++) {
910 j = adapter->rx_ring[r_idx].reg_idx;
911 ixgbe_set_ivar(adapter, 0, j, v_idx);
912 r_idx = find_next_bit(q_vector->rxr_idx,
913 adapter->num_rx_queues,
914 r_idx + 1);
915 }
916 r_idx = find_first_bit(q_vector->txr_idx,
917 adapter->num_tx_queues);
918
919 for (i = 0; i < q_vector->txr_count; i++) {
920 j = adapter->tx_ring[r_idx].reg_idx;
921 ixgbe_set_ivar(adapter, 1, j, v_idx);
922 r_idx = find_next_bit(q_vector->txr_idx,
923 adapter->num_tx_queues,
924 r_idx + 1);
925 }
926
927 /* if this is a tx only vector halve the interrupt rate */
928 if (q_vector->txr_count && !q_vector->rxr_count)
929 q_vector->eitr = (adapter->eitr_param >> 1);
930 else if (q_vector->rxr_count)
931 /* rx only */
932 q_vector->eitr = adapter->eitr_param;
933
934 ixgbe_write_eitr(q_vector);
935 }
936
937 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
938 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
939 v_idx);
940 else if (adapter->hw.mac.type == ixgbe_mac_82599EB)
941 ixgbe_set_ivar(adapter, -1, 1, v_idx);
942 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
943
944 /* set up to autoclear timer, and the vectors */
945 mask = IXGBE_EIMS_ENABLE_MASK;
946 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
947 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
948 }
949
950 enum latency_range {
951 lowest_latency = 0,
952 low_latency = 1,
953 bulk_latency = 2,
954 latency_invalid = 255
955 };
956
957 /**
958 * ixgbe_update_itr - update the dynamic ITR value based on statistics
959 * @adapter: pointer to adapter
960 * @eitr: eitr setting (ints per sec) to give last timeslice
961 * @itr_setting: current throttle rate in ints/second
962 * @packets: the number of packets during this measurement interval
963 * @bytes: the number of bytes during this measurement interval
964 *
965 * Stores a new ITR value based on packets and byte
966 * counts during the last interrupt. The advantage of per interrupt
967 * computation is faster updates and more accurate ITR for the current
968 * traffic pattern. Constants in this function were computed
969 * based on theoretical maximum wire speed and thresholds were set based
970 * on testing data as well as attempting to minimize response time
971 * while increasing bulk throughput.
972 * this functionality is controlled by the InterruptThrottleRate module
973 * parameter (see ixgbe_param.c)
974 **/
975 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
976 u32 eitr, u8 itr_setting,
977 int packets, int bytes)
978 {
979 unsigned int retval = itr_setting;
980 u32 timepassed_us;
981 u64 bytes_perint;
982
983 if (packets == 0)
984 goto update_itr_done;
985
986
987 /* simple throttlerate management
988 * 0-20MB/s lowest (100000 ints/s)
989 * 20-100MB/s low (20000 ints/s)
990 * 100-1249MB/s bulk (8000 ints/s)
991 */
992 /* what was last interrupt timeslice? */
993 timepassed_us = 1000000/eitr;
994 bytes_perint = bytes / timepassed_us; /* bytes/usec */
995
996 switch (itr_setting) {
997 case lowest_latency:
998 if (bytes_perint > adapter->eitr_low)
999 retval = low_latency;
1000 break;
1001 case low_latency:
1002 if (bytes_perint > adapter->eitr_high)
1003 retval = bulk_latency;
1004 else if (bytes_perint <= adapter->eitr_low)
1005 retval = lowest_latency;
1006 break;
1007 case bulk_latency:
1008 if (bytes_perint <= adapter->eitr_high)
1009 retval = low_latency;
1010 break;
1011 }
1012
1013 update_itr_done:
1014 return retval;
1015 }
1016
1017 /**
1018 * ixgbe_write_eitr - write EITR register in hardware specific way
1019 * @q_vector: structure containing interrupt and ring information
1020 *
1021 * This function is made to be called by ethtool and by the driver
1022 * when it needs to update EITR registers at runtime. Hardware
1023 * specific quirks/differences are taken care of here.
1024 */
1025 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1026 {
1027 struct ixgbe_adapter *adapter = q_vector->adapter;
1028 struct ixgbe_hw *hw = &adapter->hw;
1029 int v_idx = q_vector->v_idx;
1030 u32 itr_reg = EITR_INTS_PER_SEC_TO_REG(q_vector->eitr);
1031
1032 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1033 /* must write high and low 16 bits to reset counter */
1034 itr_reg |= (itr_reg << 16);
1035 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1036 /*
1037 * set the WDIS bit to not clear the timer bits and cause an
1038 * immediate assertion of the interrupt
1039 */
1040 itr_reg |= IXGBE_EITR_CNT_WDIS;
1041 }
1042 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1043 }
1044
1045 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
1046 {
1047 struct ixgbe_adapter *adapter = q_vector->adapter;
1048 u32 new_itr;
1049 u8 current_itr, ret_itr;
1050 int i, r_idx;
1051 struct ixgbe_ring *rx_ring, *tx_ring;
1052
1053 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1054 for (i = 0; i < q_vector->txr_count; i++) {
1055 tx_ring = &(adapter->tx_ring[r_idx]);
1056 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1057 q_vector->tx_itr,
1058 tx_ring->total_packets,
1059 tx_ring->total_bytes);
1060 /* if the result for this queue would decrease interrupt
1061 * rate for this vector then use that result */
1062 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
1063 q_vector->tx_itr - 1 : ret_itr);
1064 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1065 r_idx + 1);
1066 }
1067
1068 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1069 for (i = 0; i < q_vector->rxr_count; i++) {
1070 rx_ring = &(adapter->rx_ring[r_idx]);
1071 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1072 q_vector->rx_itr,
1073 rx_ring->total_packets,
1074 rx_ring->total_bytes);
1075 /* if the result for this queue would decrease interrupt
1076 * rate for this vector then use that result */
1077 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
1078 q_vector->rx_itr - 1 : ret_itr);
1079 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1080 r_idx + 1);
1081 }
1082
1083 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1084
1085 switch (current_itr) {
1086 /* counts and packets in update_itr are dependent on these numbers */
1087 case lowest_latency:
1088 new_itr = 100000;
1089 break;
1090 case low_latency:
1091 new_itr = 20000; /* aka hwitr = ~200 */
1092 break;
1093 case bulk_latency:
1094 default:
1095 new_itr = 8000;
1096 break;
1097 }
1098
1099 if (new_itr != q_vector->eitr) {
1100 /* do an exponential smoothing */
1101 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1102
1103 /* save the algorithm value here, not the smoothed one */
1104 q_vector->eitr = new_itr;
1105
1106 ixgbe_write_eitr(q_vector);
1107 }
1108
1109 return;
1110 }
1111
1112 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1113 {
1114 struct ixgbe_hw *hw = &adapter->hw;
1115
1116 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1117 (eicr & IXGBE_EICR_GPI_SDP1)) {
1118 DPRINTK(PROBE, CRIT, "Fan has stopped, replace the adapter\n");
1119 /* write to clear the interrupt */
1120 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1121 }
1122 }
1123
1124 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1125 {
1126 struct ixgbe_hw *hw = &adapter->hw;
1127
1128 if (eicr & IXGBE_EICR_GPI_SDP1) {
1129 /* Clear the interrupt */
1130 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1131 schedule_work(&adapter->multispeed_fiber_task);
1132 } else if (eicr & IXGBE_EICR_GPI_SDP2) {
1133 /* Clear the interrupt */
1134 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1135 schedule_work(&adapter->sfp_config_module_task);
1136 } else {
1137 /* Interrupt isn't for us... */
1138 return;
1139 }
1140 }
1141
1142 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1143 {
1144 struct ixgbe_hw *hw = &adapter->hw;
1145
1146 adapter->lsc_int++;
1147 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1148 adapter->link_check_timeout = jiffies;
1149 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1150 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1151 schedule_work(&adapter->watchdog_task);
1152 }
1153 }
1154
1155 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1156 {
1157 struct net_device *netdev = data;
1158 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1159 struct ixgbe_hw *hw = &adapter->hw;
1160 u32 eicr;
1161
1162 /*
1163 * Workaround for Silicon errata. Use clear-by-write instead
1164 * of clear-by-read. Reading with EICS will return the
1165 * interrupt causes without clearing, which later be done
1166 * with the write to EICR.
1167 */
1168 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1169 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1170
1171 if (eicr & IXGBE_EICR_LSC)
1172 ixgbe_check_lsc(adapter);
1173
1174 if (hw->mac.type == ixgbe_mac_82598EB)
1175 ixgbe_check_fan_failure(adapter, eicr);
1176
1177 if (hw->mac.type == ixgbe_mac_82599EB) {
1178 ixgbe_check_sfp_event(adapter, eicr);
1179
1180 /* Handle Flow Director Full threshold interrupt */
1181 if (eicr & IXGBE_EICR_FLOW_DIR) {
1182 int i;
1183 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_FLOW_DIR);
1184 /* Disable transmits before FDIR Re-initialization */
1185 netif_tx_stop_all_queues(netdev);
1186 for (i = 0; i < adapter->num_tx_queues; i++) {
1187 struct ixgbe_ring *tx_ring =
1188 &adapter->tx_ring[i];
1189 if (test_and_clear_bit(__IXGBE_FDIR_INIT_DONE,
1190 &tx_ring->reinit_state))
1191 schedule_work(&adapter->fdir_reinit_task);
1192 }
1193 }
1194 }
1195 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1196 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
1197
1198 return IRQ_HANDLED;
1199 }
1200
1201 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1202 u64 qmask)
1203 {
1204 u32 mask;
1205
1206 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1207 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1208 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1209 } else {
1210 mask = (qmask & 0xFFFFFFFF);
1211 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(0), mask);
1212 mask = (qmask >> 32);
1213 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(1), mask);
1214 }
1215 /* skip the flush */
1216 }
1217
1218 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1219 u64 qmask)
1220 {
1221 u32 mask;
1222
1223 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1224 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1225 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, mask);
1226 } else {
1227 mask = (qmask & 0xFFFFFFFF);
1228 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), mask);
1229 mask = (qmask >> 32);
1230 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), mask);
1231 }
1232 /* skip the flush */
1233 }
1234
1235 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
1236 {
1237 struct ixgbe_q_vector *q_vector = data;
1238 struct ixgbe_adapter *adapter = q_vector->adapter;
1239 struct ixgbe_ring *tx_ring;
1240 int i, r_idx;
1241
1242 if (!q_vector->txr_count)
1243 return IRQ_HANDLED;
1244
1245 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1246 for (i = 0; i < q_vector->txr_count; i++) {
1247 tx_ring = &(adapter->tx_ring[r_idx]);
1248 tx_ring->total_bytes = 0;
1249 tx_ring->total_packets = 0;
1250 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1251 r_idx + 1);
1252 }
1253
1254 /* disable interrupts on this vector only */
1255 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1256 napi_schedule(&q_vector->napi);
1257
1258 return IRQ_HANDLED;
1259 }
1260
1261 /**
1262 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
1263 * @irq: unused
1264 * @data: pointer to our q_vector struct for this interrupt vector
1265 **/
1266 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
1267 {
1268 struct ixgbe_q_vector *q_vector = data;
1269 struct ixgbe_adapter *adapter = q_vector->adapter;
1270 struct ixgbe_ring *rx_ring;
1271 int r_idx;
1272 int i;
1273
1274 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1275 for (i = 0; i < q_vector->rxr_count; i++) {
1276 rx_ring = &(adapter->rx_ring[r_idx]);
1277 rx_ring->total_bytes = 0;
1278 rx_ring->total_packets = 0;
1279 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1280 r_idx + 1);
1281 }
1282
1283 if (!q_vector->rxr_count)
1284 return IRQ_HANDLED;
1285
1286 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1287 rx_ring = &(adapter->rx_ring[r_idx]);
1288 /* disable interrupts on this vector only */
1289 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1290 napi_schedule(&q_vector->napi);
1291
1292 return IRQ_HANDLED;
1293 }
1294
1295 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1296 {
1297 struct ixgbe_q_vector *q_vector = data;
1298 struct ixgbe_adapter *adapter = q_vector->adapter;
1299 struct ixgbe_ring *ring;
1300 int r_idx;
1301 int i;
1302
1303 if (!q_vector->txr_count && !q_vector->rxr_count)
1304 return IRQ_HANDLED;
1305
1306 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1307 for (i = 0; i < q_vector->txr_count; i++) {
1308 ring = &(adapter->tx_ring[r_idx]);
1309 ring->total_bytes = 0;
1310 ring->total_packets = 0;
1311 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1312 r_idx + 1);
1313 }
1314
1315 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1316 for (i = 0; i < q_vector->rxr_count; i++) {
1317 ring = &(adapter->rx_ring[r_idx]);
1318 ring->total_bytes = 0;
1319 ring->total_packets = 0;
1320 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1321 r_idx + 1);
1322 }
1323
1324 /* disable interrupts on this vector only */
1325 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1326 napi_schedule(&q_vector->napi);
1327
1328 return IRQ_HANDLED;
1329 }
1330
1331 /**
1332 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1333 * @napi: napi struct with our devices info in it
1334 * @budget: amount of work driver is allowed to do this pass, in packets
1335 *
1336 * This function is optimized for cleaning one queue only on a single
1337 * q_vector!!!
1338 **/
1339 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1340 {
1341 struct ixgbe_q_vector *q_vector =
1342 container_of(napi, struct ixgbe_q_vector, napi);
1343 struct ixgbe_adapter *adapter = q_vector->adapter;
1344 struct ixgbe_ring *rx_ring = NULL;
1345 int work_done = 0;
1346 long r_idx;
1347
1348 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1349 rx_ring = &(adapter->rx_ring[r_idx]);
1350 #ifdef CONFIG_IXGBE_DCA
1351 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1352 ixgbe_update_rx_dca(adapter, rx_ring);
1353 #endif
1354
1355 ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
1356
1357 /* If all Rx work done, exit the polling mode */
1358 if (work_done < budget) {
1359 napi_complete(napi);
1360 if (adapter->itr_setting & 1)
1361 ixgbe_set_itr_msix(q_vector);
1362 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1363 ixgbe_irq_enable_queues(adapter,
1364 ((u64)1 << q_vector->v_idx));
1365 }
1366
1367 return work_done;
1368 }
1369
1370 /**
1371 * ixgbe_clean_rxtx_many - msix (aka one shot) rx clean routine
1372 * @napi: napi struct with our devices info in it
1373 * @budget: amount of work driver is allowed to do this pass, in packets
1374 *
1375 * This function will clean more than one rx queue associated with a
1376 * q_vector.
1377 **/
1378 static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
1379 {
1380 struct ixgbe_q_vector *q_vector =
1381 container_of(napi, struct ixgbe_q_vector, napi);
1382 struct ixgbe_adapter *adapter = q_vector->adapter;
1383 struct ixgbe_ring *ring = NULL;
1384 int work_done = 0, i;
1385 long r_idx;
1386 bool tx_clean_complete = true;
1387
1388 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1389 for (i = 0; i < q_vector->txr_count; i++) {
1390 ring = &(adapter->tx_ring[r_idx]);
1391 #ifdef CONFIG_IXGBE_DCA
1392 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1393 ixgbe_update_tx_dca(adapter, ring);
1394 #endif
1395 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
1396 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1397 r_idx + 1);
1398 }
1399
1400 /* attempt to distribute budget to each queue fairly, but don't allow
1401 * the budget to go below 1 because we'll exit polling */
1402 budget /= (q_vector->rxr_count ?: 1);
1403 budget = max(budget, 1);
1404 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1405 for (i = 0; i < q_vector->rxr_count; i++) {
1406 ring = &(adapter->rx_ring[r_idx]);
1407 #ifdef CONFIG_IXGBE_DCA
1408 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1409 ixgbe_update_rx_dca(adapter, ring);
1410 #endif
1411 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
1412 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1413 r_idx + 1);
1414 }
1415
1416 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1417 ring = &(adapter->rx_ring[r_idx]);
1418 /* If all Rx work done, exit the polling mode */
1419 if (work_done < budget) {
1420 napi_complete(napi);
1421 if (adapter->itr_setting & 1)
1422 ixgbe_set_itr_msix(q_vector);
1423 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1424 ixgbe_irq_enable_queues(adapter,
1425 ((u64)1 << q_vector->v_idx));
1426 return 0;
1427 }
1428
1429 return work_done;
1430 }
1431
1432 /**
1433 * ixgbe_clean_txonly - msix (aka one shot) tx clean routine
1434 * @napi: napi struct with our devices info in it
1435 * @budget: amount of work driver is allowed to do this pass, in packets
1436 *
1437 * This function is optimized for cleaning one queue only on a single
1438 * q_vector!!!
1439 **/
1440 static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
1441 {
1442 struct ixgbe_q_vector *q_vector =
1443 container_of(napi, struct ixgbe_q_vector, napi);
1444 struct ixgbe_adapter *adapter = q_vector->adapter;
1445 struct ixgbe_ring *tx_ring = NULL;
1446 int work_done = 0;
1447 long r_idx;
1448
1449 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1450 tx_ring = &(adapter->tx_ring[r_idx]);
1451 #ifdef CONFIG_IXGBE_DCA
1452 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1453 ixgbe_update_tx_dca(adapter, tx_ring);
1454 #endif
1455
1456 if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
1457 work_done = budget;
1458
1459 /* If all Rx work done, exit the polling mode */
1460 if (work_done < budget) {
1461 napi_complete(napi);
1462 if (adapter->itr_setting & 1)
1463 ixgbe_set_itr_msix(q_vector);
1464 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1465 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
1466 }
1467
1468 return work_done;
1469 }
1470
1471 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
1472 int r_idx)
1473 {
1474 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1475
1476 set_bit(r_idx, q_vector->rxr_idx);
1477 q_vector->rxr_count++;
1478 }
1479
1480 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
1481 int t_idx)
1482 {
1483 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1484
1485 set_bit(t_idx, q_vector->txr_idx);
1486 q_vector->txr_count++;
1487 }
1488
1489 /**
1490 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
1491 * @adapter: board private structure to initialize
1492 * @vectors: allotted vector count for descriptor rings
1493 *
1494 * This function maps descriptor rings to the queue-specific vectors
1495 * we were allotted through the MSI-X enabling code. Ideally, we'd have
1496 * one vector per ring/queue, but on a constrained vector budget, we
1497 * group the rings as "efficiently" as possible. You would add new
1498 * mapping configurations in here.
1499 **/
1500 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
1501 int vectors)
1502 {
1503 int v_start = 0;
1504 int rxr_idx = 0, txr_idx = 0;
1505 int rxr_remaining = adapter->num_rx_queues;
1506 int txr_remaining = adapter->num_tx_queues;
1507 int i, j;
1508 int rqpv, tqpv;
1509 int err = 0;
1510
1511 /* No mapping required if MSI-X is disabled. */
1512 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1513 goto out;
1514
1515 /*
1516 * The ideal configuration...
1517 * We have enough vectors to map one per queue.
1518 */
1519 if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1520 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1521 map_vector_to_rxq(adapter, v_start, rxr_idx);
1522
1523 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1524 map_vector_to_txq(adapter, v_start, txr_idx);
1525
1526 goto out;
1527 }
1528
1529 /*
1530 * If we don't have enough vectors for a 1-to-1
1531 * mapping, we'll have to group them so there are
1532 * multiple queues per vector.
1533 */
1534 /* Re-adjusting *qpv takes care of the remainder. */
1535 for (i = v_start; i < vectors; i++) {
1536 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
1537 for (j = 0; j < rqpv; j++) {
1538 map_vector_to_rxq(adapter, i, rxr_idx);
1539 rxr_idx++;
1540 rxr_remaining--;
1541 }
1542 }
1543 for (i = v_start; i < vectors; i++) {
1544 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
1545 for (j = 0; j < tqpv; j++) {
1546 map_vector_to_txq(adapter, i, txr_idx);
1547 txr_idx++;
1548 txr_remaining--;
1549 }
1550 }
1551
1552 out:
1553 return err;
1554 }
1555
1556 /**
1557 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
1558 * @adapter: board private structure
1559 *
1560 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
1561 * interrupts from the kernel.
1562 **/
1563 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
1564 {
1565 struct net_device *netdev = adapter->netdev;
1566 irqreturn_t (*handler)(int, void *);
1567 int i, vector, q_vectors, err;
1568 int ri=0, ti=0;
1569
1570 /* Decrement for Other and TCP Timer vectors */
1571 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1572
1573 /* Map the Tx/Rx rings to the vectors we were allotted. */
1574 err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
1575 if (err)
1576 goto out;
1577
1578 #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
1579 (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
1580 &ixgbe_msix_clean_many)
1581 for (vector = 0; vector < q_vectors; vector++) {
1582 handler = SET_HANDLER(adapter->q_vector[vector]);
1583
1584 if(handler == &ixgbe_msix_clean_rx) {
1585 sprintf(adapter->name[vector], "%s-%s-%d",
1586 netdev->name, "rx", ri++);
1587 }
1588 else if(handler == &ixgbe_msix_clean_tx) {
1589 sprintf(adapter->name[vector], "%s-%s-%d",
1590 netdev->name, "tx", ti++);
1591 }
1592 else
1593 sprintf(adapter->name[vector], "%s-%s-%d",
1594 netdev->name, "TxRx", vector);
1595
1596 err = request_irq(adapter->msix_entries[vector].vector,
1597 handler, 0, adapter->name[vector],
1598 adapter->q_vector[vector]);
1599 if (err) {
1600 DPRINTK(PROBE, ERR,
1601 "request_irq failed for MSIX interrupt "
1602 "Error: %d\n", err);
1603 goto free_queue_irqs;
1604 }
1605 }
1606
1607 sprintf(adapter->name[vector], "%s:lsc", netdev->name);
1608 err = request_irq(adapter->msix_entries[vector].vector,
1609 &ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
1610 if (err) {
1611 DPRINTK(PROBE, ERR,
1612 "request_irq for msix_lsc failed: %d\n", err);
1613 goto free_queue_irqs;
1614 }
1615
1616 return 0;
1617
1618 free_queue_irqs:
1619 for (i = vector - 1; i >= 0; i--)
1620 free_irq(adapter->msix_entries[--vector].vector,
1621 adapter->q_vector[i]);
1622 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
1623 pci_disable_msix(adapter->pdev);
1624 kfree(adapter->msix_entries);
1625 adapter->msix_entries = NULL;
1626 out:
1627 return err;
1628 }
1629
1630 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
1631 {
1632 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1633 u8 current_itr;
1634 u32 new_itr = q_vector->eitr;
1635 struct ixgbe_ring *rx_ring = &adapter->rx_ring[0];
1636 struct ixgbe_ring *tx_ring = &adapter->tx_ring[0];
1637
1638 q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
1639 q_vector->tx_itr,
1640 tx_ring->total_packets,
1641 tx_ring->total_bytes);
1642 q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
1643 q_vector->rx_itr,
1644 rx_ring->total_packets,
1645 rx_ring->total_bytes);
1646
1647 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1648
1649 switch (current_itr) {
1650 /* counts and packets in update_itr are dependent on these numbers */
1651 case lowest_latency:
1652 new_itr = 100000;
1653 break;
1654 case low_latency:
1655 new_itr = 20000; /* aka hwitr = ~200 */
1656 break;
1657 case bulk_latency:
1658 new_itr = 8000;
1659 break;
1660 default:
1661 break;
1662 }
1663
1664 if (new_itr != q_vector->eitr) {
1665 /* do an exponential smoothing */
1666 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1667
1668 /* save the algorithm value here, not the smoothed one */
1669 q_vector->eitr = new_itr;
1670
1671 ixgbe_write_eitr(q_vector);
1672 }
1673
1674 return;
1675 }
1676
1677 /**
1678 * ixgbe_irq_enable - Enable default interrupt generation settings
1679 * @adapter: board private structure
1680 **/
1681 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
1682 {
1683 u32 mask;
1684
1685 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
1686 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
1687 mask |= IXGBE_EIMS_GPI_SDP1;
1688 if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1689 mask |= IXGBE_EIMS_ECC;
1690 mask |= IXGBE_EIMS_GPI_SDP1;
1691 mask |= IXGBE_EIMS_GPI_SDP2;
1692 }
1693 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
1694 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
1695 mask |= IXGBE_EIMS_FLOW_DIR;
1696
1697 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1698 ixgbe_irq_enable_queues(adapter, ~0);
1699 IXGBE_WRITE_FLUSH(&adapter->hw);
1700 }
1701
1702 /**
1703 * ixgbe_intr - legacy mode Interrupt Handler
1704 * @irq: interrupt number
1705 * @data: pointer to a network interface device structure
1706 **/
1707 static irqreturn_t ixgbe_intr(int irq, void *data)
1708 {
1709 struct net_device *netdev = data;
1710 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1711 struct ixgbe_hw *hw = &adapter->hw;
1712 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1713 u32 eicr;
1714
1715 /*
1716 * Workaround for silicon errata. Mask the interrupts
1717 * before the read of EICR.
1718 */
1719 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
1720
1721 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
1722 * therefore no explict interrupt disable is necessary */
1723 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
1724 if (!eicr) {
1725 /* shared interrupt alert!
1726 * make sure interrupts are enabled because the read will
1727 * have disabled interrupts due to EIAM */
1728 ixgbe_irq_enable(adapter);
1729 return IRQ_NONE; /* Not our interrupt */
1730 }
1731
1732 if (eicr & IXGBE_EICR_LSC)
1733 ixgbe_check_lsc(adapter);
1734
1735 if (hw->mac.type == ixgbe_mac_82599EB)
1736 ixgbe_check_sfp_event(adapter, eicr);
1737
1738 ixgbe_check_fan_failure(adapter, eicr);
1739
1740 if (napi_schedule_prep(&(q_vector->napi))) {
1741 adapter->tx_ring[0].total_packets = 0;
1742 adapter->tx_ring[0].total_bytes = 0;
1743 adapter->rx_ring[0].total_packets = 0;
1744 adapter->rx_ring[0].total_bytes = 0;
1745 /* would disable interrupts here but EIAM disabled it */
1746 __napi_schedule(&(q_vector->napi));
1747 }
1748
1749 return IRQ_HANDLED;
1750 }
1751
1752 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
1753 {
1754 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1755
1756 for (i = 0; i < q_vectors; i++) {
1757 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
1758 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
1759 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
1760 q_vector->rxr_count = 0;
1761 q_vector->txr_count = 0;
1762 }
1763 }
1764
1765 /**
1766 * ixgbe_request_irq - initialize interrupts
1767 * @adapter: board private structure
1768 *
1769 * Attempts to configure interrupts using the best available
1770 * capabilities of the hardware and kernel.
1771 **/
1772 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
1773 {
1774 struct net_device *netdev = adapter->netdev;
1775 int err;
1776
1777 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1778 err = ixgbe_request_msix_irqs(adapter);
1779 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
1780 err = request_irq(adapter->pdev->irq, &ixgbe_intr, 0,
1781 netdev->name, netdev);
1782 } else {
1783 err = request_irq(adapter->pdev->irq, &ixgbe_intr, IRQF_SHARED,
1784 netdev->name, netdev);
1785 }
1786
1787 if (err)
1788 DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err);
1789
1790 return err;
1791 }
1792
1793 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
1794 {
1795 struct net_device *netdev = adapter->netdev;
1796
1797 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1798 int i, q_vectors;
1799
1800 q_vectors = adapter->num_msix_vectors;
1801
1802 i = q_vectors - 1;
1803 free_irq(adapter->msix_entries[i].vector, netdev);
1804
1805 i--;
1806 for (; i >= 0; i--) {
1807 free_irq(adapter->msix_entries[i].vector,
1808 adapter->q_vector[i]);
1809 }
1810
1811 ixgbe_reset_q_vectors(adapter);
1812 } else {
1813 free_irq(adapter->pdev->irq, netdev);
1814 }
1815 }
1816
1817 /**
1818 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
1819 * @adapter: board private structure
1820 **/
1821 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
1822 {
1823 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1824 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
1825 } else {
1826 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
1827 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
1828 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
1829 }
1830 IXGBE_WRITE_FLUSH(&adapter->hw);
1831 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1832 int i;
1833 for (i = 0; i < adapter->num_msix_vectors; i++)
1834 synchronize_irq(adapter->msix_entries[i].vector);
1835 } else {
1836 synchronize_irq(adapter->pdev->irq);
1837 }
1838 }
1839
1840 /**
1841 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
1842 *
1843 **/
1844 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
1845 {
1846 struct ixgbe_hw *hw = &adapter->hw;
1847
1848 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
1849 EITR_INTS_PER_SEC_TO_REG(adapter->eitr_param));
1850
1851 ixgbe_set_ivar(adapter, 0, 0, 0);
1852 ixgbe_set_ivar(adapter, 1, 0, 0);
1853
1854 map_vector_to_rxq(adapter, 0, 0);
1855 map_vector_to_txq(adapter, 0, 0);
1856
1857 DPRINTK(HW, INFO, "Legacy interrupt IVAR setup done\n");
1858 }
1859
1860 /**
1861 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
1862 * @adapter: board private structure
1863 *
1864 * Configure the Tx unit of the MAC after a reset.
1865 **/
1866 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
1867 {
1868 u64 tdba;
1869 struct ixgbe_hw *hw = &adapter->hw;
1870 u32 i, j, tdlen, txctrl;
1871
1872 /* Setup the HW Tx Head and Tail descriptor pointers */
1873 for (i = 0; i < adapter->num_tx_queues; i++) {
1874 struct ixgbe_ring *ring = &adapter->tx_ring[i];
1875 j = ring->reg_idx;
1876 tdba = ring->dma;
1877 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1878 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(j),
1879 (tdba & DMA_BIT_MASK(32)));
1880 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(j), (tdba >> 32));
1881 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(j), tdlen);
1882 IXGBE_WRITE_REG(hw, IXGBE_TDH(j), 0);
1883 IXGBE_WRITE_REG(hw, IXGBE_TDT(j), 0);
1884 adapter->tx_ring[i].head = IXGBE_TDH(j);
1885 adapter->tx_ring[i].tail = IXGBE_TDT(j);
1886 /* Disable Tx Head Writeback RO bit, since this hoses
1887 * bookkeeping if things aren't delivered in order.
1888 */
1889 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(j));
1890 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1891 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(j), txctrl);
1892 }
1893 if (hw->mac.type == ixgbe_mac_82599EB) {
1894 /* We enable 8 traffic classes, DCB only */
1895 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
1896 IXGBE_WRITE_REG(hw, IXGBE_MTQC, (IXGBE_MTQC_RT_ENA |
1897 IXGBE_MTQC_8TC_8TQ));
1898 }
1899 }
1900
1901 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1902
1903 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
1904 struct ixgbe_ring *rx_ring)
1905 {
1906 u32 srrctl;
1907 int index;
1908 struct ixgbe_ring_feature *feature = adapter->ring_feature;
1909
1910 index = rx_ring->reg_idx;
1911 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1912 unsigned long mask;
1913 mask = (unsigned long) feature[RING_F_RSS].mask;
1914 index = index & mask;
1915 }
1916 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
1917
1918 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
1919 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
1920
1921 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
1922 IXGBE_SRRCTL_BSIZEHDR_MASK;
1923
1924 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1925 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
1926 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1927 #else
1928 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1929 #endif
1930 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1931 } else {
1932 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
1933 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1934 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1935 }
1936
1937 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
1938 }
1939
1940 static u32 ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
1941 {
1942 u32 mrqc = 0;
1943 int mask;
1944
1945 if (!(adapter->hw.mac.type == ixgbe_mac_82599EB))
1946 return mrqc;
1947
1948 mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
1949 #ifdef CONFIG_IXGBE_DCB
1950 | IXGBE_FLAG_DCB_ENABLED
1951 #endif
1952 );
1953
1954 switch (mask) {
1955 case (IXGBE_FLAG_RSS_ENABLED):
1956 mrqc = IXGBE_MRQC_RSSEN;
1957 break;
1958 #ifdef CONFIG_IXGBE_DCB
1959 case (IXGBE_FLAG_DCB_ENABLED):
1960 mrqc = IXGBE_MRQC_RT8TCEN;
1961 break;
1962 #endif /* CONFIG_IXGBE_DCB */
1963 default:
1964 break;
1965 }
1966
1967 return mrqc;
1968 }
1969
1970 /**
1971 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
1972 * @adapter: board private structure
1973 *
1974 * Configure the Rx unit of the MAC after a reset.
1975 **/
1976 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
1977 {
1978 u64 rdba;
1979 struct ixgbe_hw *hw = &adapter->hw;
1980 struct ixgbe_ring *rx_ring;
1981 struct net_device *netdev = adapter->netdev;
1982 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1983 int i, j;
1984 u32 rdlen, rxctrl, rxcsum;
1985 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
1986 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
1987 0x6A3E67EA, 0x14364D17, 0x3BED200D};
1988 u32 fctrl, hlreg0;
1989 u32 reta = 0, mrqc = 0;
1990 u32 rdrxctl;
1991 u32 rscctrl;
1992 int rx_buf_len;
1993
1994 /* Decide whether to use packet split mode or not */
1995 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
1996
1997 /* Set the RX buffer length according to the mode */
1998 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1999 rx_buf_len = IXGBE_RX_HDR_SIZE;
2000 if (hw->mac.type == ixgbe_mac_82599EB) {
2001 /* PSRTYPE must be initialized in 82599 */
2002 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
2003 IXGBE_PSRTYPE_UDPHDR |
2004 IXGBE_PSRTYPE_IPV4HDR |
2005 IXGBE_PSRTYPE_IPV6HDR |
2006 IXGBE_PSRTYPE_L2HDR;
2007 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(0), psrtype);
2008 }
2009 } else {
2010 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
2011 (netdev->mtu <= ETH_DATA_LEN))
2012 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
2013 else
2014 rx_buf_len = ALIGN(max_frame, 1024);
2015 }
2016
2017 fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
2018 fctrl |= IXGBE_FCTRL_BAM;
2019 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
2020 fctrl |= IXGBE_FCTRL_PMCF;
2021 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
2022
2023 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
2024 if (adapter->netdev->mtu <= ETH_DATA_LEN)
2025 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
2026 else
2027 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2028 #ifdef IXGBE_FCOE
2029 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
2030 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2031 #endif
2032 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
2033
2034 rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
2035 /* disable receives while setting up the descriptors */
2036 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2037 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2038
2039 /*
2040 * Setup the HW Rx Head and Tail Descriptor Pointers and
2041 * the Base and Length of the Rx Descriptor Ring
2042 */
2043 for (i = 0; i < adapter->num_rx_queues; i++) {
2044 rx_ring = &adapter->rx_ring[i];
2045 rdba = rx_ring->dma;
2046 j = rx_ring->reg_idx;
2047 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(j), (rdba & DMA_BIT_MASK(32)));
2048 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(j), (rdba >> 32));
2049 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(j), rdlen);
2050 IXGBE_WRITE_REG(hw, IXGBE_RDH(j), 0);
2051 IXGBE_WRITE_REG(hw, IXGBE_RDT(j), 0);
2052 rx_ring->head = IXGBE_RDH(j);
2053 rx_ring->tail = IXGBE_RDT(j);
2054 rx_ring->rx_buf_len = rx_buf_len;
2055
2056 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
2057 rx_ring->flags |= IXGBE_RING_RX_PS_ENABLED;
2058
2059 #ifdef IXGBE_FCOE
2060 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
2061 struct ixgbe_ring_feature *f;
2062 f = &adapter->ring_feature[RING_F_FCOE];
2063 if ((i >= f->mask) && (i < f->mask + f->indices)) {
2064 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2065 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
2066 rx_ring->rx_buf_len =
2067 IXGBE_FCOE_JUMBO_FRAME_SIZE;
2068 }
2069 }
2070
2071 #endif /* IXGBE_FCOE */
2072 ixgbe_configure_srrctl(adapter, rx_ring);
2073 }
2074
2075 if (hw->mac.type == ixgbe_mac_82598EB) {
2076 /*
2077 * For VMDq support of different descriptor types or
2078 * buffer sizes through the use of multiple SRRCTL
2079 * registers, RDRXCTL.MVMEN must be set to 1
2080 *
2081 * also, the manual doesn't mention it clearly but DCA hints
2082 * will only use queue 0's tags unless this bit is set. Side
2083 * effects of setting this bit are only that SRRCTL must be
2084 * fully programmed [0..15]
2085 */
2086 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2087 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
2088 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2089 }
2090
2091 /* Program MRQC for the distribution of queues */
2092 mrqc = ixgbe_setup_mrqc(adapter);
2093
2094 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
2095 /* Fill out redirection table */
2096 for (i = 0, j = 0; i < 128; i++, j++) {
2097 if (j == adapter->ring_feature[RING_F_RSS].indices)
2098 j = 0;
2099 /* reta = 4-byte sliding window of
2100 * 0x00..(indices-1)(indices-1)00..etc. */
2101 reta = (reta << 8) | (j * 0x11);
2102 if ((i & 3) == 3)
2103 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2104 }
2105
2106 /* Fill out hash function seeds */
2107 for (i = 0; i < 10; i++)
2108 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2109
2110 if (hw->mac.type == ixgbe_mac_82598EB)
2111 mrqc |= IXGBE_MRQC_RSSEN;
2112 /* Perform hash on these packet types */
2113 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2114 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2115 | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
2116 | IXGBE_MRQC_RSS_FIELD_IPV6
2117 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
2118 | IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
2119 }
2120 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2121
2122 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2123
2124 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED ||
2125 adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
2126 /* Disable indicating checksum in descriptor, enables
2127 * RSS hash */
2128 rxcsum |= IXGBE_RXCSUM_PCSD;
2129 }
2130 if (!(rxcsum & IXGBE_RXCSUM_PCSD)) {
2131 /* Enable IPv4 payload checksum for UDP fragments
2132 * if PCSD is not set */
2133 rxcsum |= IXGBE_RXCSUM_IPPCSE;
2134 }
2135
2136 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2137
2138 if (hw->mac.type == ixgbe_mac_82599EB) {
2139 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2140 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
2141 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
2142 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2143 }
2144
2145 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
2146 /* Enable 82599 HW-RSC */
2147 for (i = 0; i < adapter->num_rx_queues; i++) {
2148 rx_ring = &adapter->rx_ring[i];
2149 j = rx_ring->reg_idx;
2150 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(j));
2151 rscctrl |= IXGBE_RSCCTL_RSCEN;
2152 /*
2153 * we must limit the number of descriptors so that the
2154 * total size of max desc * buf_len is not greater
2155 * than 65535
2156 */
2157 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2158 #if (MAX_SKB_FRAGS > 16)
2159 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2160 #elif (MAX_SKB_FRAGS > 8)
2161 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2162 #elif (MAX_SKB_FRAGS > 4)
2163 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2164 #else
2165 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2166 #endif
2167 } else {
2168 if (rx_buf_len < IXGBE_RXBUFFER_4096)
2169 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2170 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
2171 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2172 else
2173 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2174 }
2175 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(j), rscctrl);
2176 }
2177 /* Disable RSC for ACK packets */
2178 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
2179 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
2180 }
2181 }
2182
2183 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2184 {
2185 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2186 struct ixgbe_hw *hw = &adapter->hw;
2187
2188 /* add VID to filter table */
2189 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, true);
2190 }
2191
2192 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2193 {
2194 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2195 struct ixgbe_hw *hw = &adapter->hw;
2196
2197 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2198 ixgbe_irq_disable(adapter);
2199
2200 vlan_group_set_device(adapter->vlgrp, vid, NULL);
2201
2202 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2203 ixgbe_irq_enable(adapter);
2204
2205 /* remove VID from filter table */
2206 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, false);
2207 }
2208
2209 static void ixgbe_vlan_rx_register(struct net_device *netdev,
2210 struct vlan_group *grp)
2211 {
2212 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2213 u32 ctrl;
2214 int i, j;
2215
2216 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2217 ixgbe_irq_disable(adapter);
2218 adapter->vlgrp = grp;
2219
2220 /*
2221 * For a DCB driver, always enable VLAN tag stripping so we can
2222 * still receive traffic from a DCB-enabled host even if we're
2223 * not in DCB mode.
2224 */
2225 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
2226 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2227 ctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2228 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
2229 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
2230 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
2231 ctrl |= IXGBE_VLNCTRL_VFE;
2232 /* enable VLAN tag insert/strip */
2233 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
2234 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
2235 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
2236 for (i = 0; i < adapter->num_rx_queues; i++) {
2237 j = adapter->rx_ring[i].reg_idx;
2238 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXDCTL(j));
2239 ctrl |= IXGBE_RXDCTL_VME;
2240 IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXDCTL(j), ctrl);
2241 }
2242 }
2243 ixgbe_vlan_rx_add_vid(netdev, 0);
2244
2245 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2246 ixgbe_irq_enable(adapter);
2247 }
2248
2249 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
2250 {
2251 ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2252
2253 if (adapter->vlgrp) {
2254 u16 vid;
2255 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2256 if (!vlan_group_get_device(adapter->vlgrp, vid))
2257 continue;
2258 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
2259 }
2260 }
2261 }
2262
2263 static u8 *ixgbe_addr_list_itr(struct ixgbe_hw *hw, u8 **mc_addr_ptr, u32 *vmdq)
2264 {
2265 struct dev_mc_list *mc_ptr;
2266 u8 *addr = *mc_addr_ptr;
2267 *vmdq = 0;
2268
2269 mc_ptr = container_of(addr, struct dev_mc_list, dmi_addr[0]);
2270 if (mc_ptr->next)
2271 *mc_addr_ptr = mc_ptr->next->dmi_addr;
2272 else
2273 *mc_addr_ptr = NULL;
2274
2275 return addr;
2276 }
2277
2278 /**
2279 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
2280 * @netdev: network interface device structure
2281 *
2282 * The set_rx_method entry point is called whenever the unicast/multicast
2283 * address list or the network interface flags are updated. This routine is
2284 * responsible for configuring the hardware for proper unicast, multicast and
2285 * promiscuous mode.
2286 **/
2287 static void ixgbe_set_rx_mode(struct net_device *netdev)
2288 {
2289 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2290 struct ixgbe_hw *hw = &adapter->hw;
2291 u32 fctrl, vlnctrl;
2292 u8 *addr_list = NULL;
2293 int addr_count = 0;
2294
2295 /* Check for Promiscuous and All Multicast modes */
2296
2297 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
2298 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2299
2300 if (netdev->flags & IFF_PROMISC) {
2301 hw->addr_ctrl.user_set_promisc = 1;
2302 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2303 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
2304 } else {
2305 if (netdev->flags & IFF_ALLMULTI) {
2306 fctrl |= IXGBE_FCTRL_MPE;
2307 fctrl &= ~IXGBE_FCTRL_UPE;
2308 } else {
2309 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2310 }
2311 vlnctrl |= IXGBE_VLNCTRL_VFE;
2312 hw->addr_ctrl.user_set_promisc = 0;
2313 }
2314
2315 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
2316 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2317
2318 /* reprogram secondary unicast list */
2319 hw->mac.ops.update_uc_addr_list(hw, &netdev->uc.list);
2320
2321 /* reprogram multicast list */
2322 addr_count = netdev->mc_count;
2323 if (addr_count)
2324 addr_list = netdev->mc_list->dmi_addr;
2325 hw->mac.ops.update_mc_addr_list(hw, addr_list, addr_count,
2326 ixgbe_addr_list_itr);
2327 }
2328
2329 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
2330 {
2331 int q_idx;
2332 struct ixgbe_q_vector *q_vector;
2333 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2334
2335 /* legacy and MSI only use one vector */
2336 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2337 q_vectors = 1;
2338
2339 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2340 struct napi_struct *napi;
2341 q_vector = adapter->q_vector[q_idx];
2342 napi = &q_vector->napi;
2343 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2344 if (!q_vector->rxr_count || !q_vector->txr_count) {
2345 if (q_vector->txr_count == 1)
2346 napi->poll = &ixgbe_clean_txonly;
2347 else if (q_vector->rxr_count == 1)
2348 napi->poll = &ixgbe_clean_rxonly;
2349 }
2350 }
2351
2352 napi_enable(napi);
2353 }
2354 }
2355
2356 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
2357 {
2358 int q_idx;
2359 struct ixgbe_q_vector *q_vector;
2360 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2361
2362 /* legacy and MSI only use one vector */
2363 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2364 q_vectors = 1;
2365
2366 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2367 q_vector = adapter->q_vector[q_idx];
2368 napi_disable(&q_vector->napi);
2369 }
2370 }
2371
2372 #ifdef CONFIG_IXGBE_DCB
2373 /*
2374 * ixgbe_configure_dcb - Configure DCB hardware
2375 * @adapter: ixgbe adapter struct
2376 *
2377 * This is called by the driver on open to configure the DCB hardware.
2378 * This is also called by the gennetlink interface when reconfiguring
2379 * the DCB state.
2380 */
2381 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
2382 {
2383 struct ixgbe_hw *hw = &adapter->hw;
2384 u32 txdctl, vlnctrl;
2385 int i, j;
2386
2387 ixgbe_dcb_check_config(&adapter->dcb_cfg);
2388 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_TX_CONFIG);
2389 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_RX_CONFIG);
2390
2391 /* reconfigure the hardware */
2392 ixgbe_dcb_hw_config(&adapter->hw, &adapter->dcb_cfg);
2393
2394 for (i = 0; i < adapter->num_tx_queues; i++) {
2395 j = adapter->tx_ring[i].reg_idx;
2396 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2397 /* PThresh workaround for Tx hang with DFP enabled. */
2398 txdctl |= 32;
2399 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2400 }
2401 /* Enable VLAN tag insert/strip */
2402 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2403 if (hw->mac.type == ixgbe_mac_82598EB) {
2404 vlnctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2405 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2406 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2407 } else if (hw->mac.type == ixgbe_mac_82599EB) {
2408 vlnctrl |= IXGBE_VLNCTRL_VFE;
2409 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2410 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2411 for (i = 0; i < adapter->num_rx_queues; i++) {
2412 j = adapter->rx_ring[i].reg_idx;
2413 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2414 vlnctrl |= IXGBE_RXDCTL_VME;
2415 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
2416 }
2417 }
2418 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
2419 }
2420
2421 #endif
2422 static void ixgbe_configure(struct ixgbe_adapter *adapter)
2423 {
2424 struct net_device *netdev = adapter->netdev;
2425 struct ixgbe_hw *hw = &adapter->hw;
2426 int i;
2427
2428 ixgbe_set_rx_mode(netdev);
2429
2430 ixgbe_restore_vlan(adapter);
2431 #ifdef CONFIG_IXGBE_DCB
2432 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2433 netif_set_gso_max_size(netdev, 32768);
2434 ixgbe_configure_dcb(adapter);
2435 } else {
2436 netif_set_gso_max_size(netdev, 65536);
2437 }
2438 #else
2439 netif_set_gso_max_size(netdev, 65536);
2440 #endif
2441
2442 #ifdef IXGBE_FCOE
2443 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
2444 ixgbe_configure_fcoe(adapter);
2445
2446 #endif /* IXGBE_FCOE */
2447 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2448 for (i = 0; i < adapter->num_tx_queues; i++)
2449 adapter->tx_ring[i].atr_sample_rate =
2450 adapter->atr_sample_rate;
2451 ixgbe_init_fdir_signature_82599(hw, adapter->fdir_pballoc);
2452 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
2453 ixgbe_init_fdir_perfect_82599(hw, adapter->fdir_pballoc);
2454 }
2455
2456 ixgbe_configure_tx(adapter);
2457 ixgbe_configure_rx(adapter);
2458 for (i = 0; i < adapter->num_rx_queues; i++)
2459 ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i],
2460 (adapter->rx_ring[i].count - 1));
2461 }
2462
2463 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
2464 {
2465 switch (hw->phy.type) {
2466 case ixgbe_phy_sfp_avago:
2467 case ixgbe_phy_sfp_ftl:
2468 case ixgbe_phy_sfp_intel:
2469 case ixgbe_phy_sfp_unknown:
2470 case ixgbe_phy_tw_tyco:
2471 case ixgbe_phy_tw_unknown:
2472 return true;
2473 default:
2474 return false;
2475 }
2476 }
2477
2478 /**
2479 * ixgbe_sfp_link_config - set up SFP+ link
2480 * @adapter: pointer to private adapter struct
2481 **/
2482 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
2483 {
2484 struct ixgbe_hw *hw = &adapter->hw;
2485
2486 if (hw->phy.multispeed_fiber) {
2487 /*
2488 * In multispeed fiber setups, the device may not have
2489 * had a physical connection when the driver loaded.
2490 * If that's the case, the initial link configuration
2491 * couldn't get the MAC into 10G or 1G mode, so we'll
2492 * never have a link status change interrupt fire.
2493 * We need to try and force an autonegotiation
2494 * session, then bring up link.
2495 */
2496 hw->mac.ops.setup_sfp(hw);
2497 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
2498 schedule_work(&adapter->multispeed_fiber_task);
2499 } else {
2500 /*
2501 * Direct Attach Cu and non-multispeed fiber modules
2502 * still need to be configured properly prior to
2503 * attempting link.
2504 */
2505 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_MOD_TASK))
2506 schedule_work(&adapter->sfp_config_module_task);
2507 }
2508 }
2509
2510 /**
2511 * ixgbe_non_sfp_link_config - set up non-SFP+ link
2512 * @hw: pointer to private hardware struct
2513 *
2514 * Returns 0 on success, negative on failure
2515 **/
2516 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
2517 {
2518 u32 autoneg;
2519 bool link_up = false;
2520 u32 ret = IXGBE_ERR_LINK_SETUP;
2521
2522 if (hw->mac.ops.check_link)
2523 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
2524
2525 if (ret)
2526 goto link_cfg_out;
2527
2528 if (hw->mac.ops.get_link_capabilities)
2529 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg,
2530 &hw->mac.autoneg);
2531 if (ret)
2532 goto link_cfg_out;
2533
2534 if (hw->mac.ops.setup_link_speed)
2535 ret = hw->mac.ops.setup_link_speed(hw, autoneg, true, link_up);
2536 link_cfg_out:
2537 return ret;
2538 }
2539
2540 #define IXGBE_MAX_RX_DESC_POLL 10
2541 static inline void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
2542 int rxr)
2543 {
2544 int j = adapter->rx_ring[rxr].reg_idx;
2545 int k;
2546
2547 for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) {
2548 if (IXGBE_READ_REG(&adapter->hw,
2549 IXGBE_RXDCTL(j)) & IXGBE_RXDCTL_ENABLE)
2550 break;
2551 else
2552 msleep(1);
2553 }
2554 if (k >= IXGBE_MAX_RX_DESC_POLL) {
2555 DPRINTK(DRV, ERR, "RXDCTL.ENABLE on Rx queue %d "
2556 "not set within the polling period\n", rxr);
2557 }
2558 ixgbe_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr],
2559 (adapter->rx_ring[rxr].count - 1));
2560 }
2561
2562 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
2563 {
2564 struct net_device *netdev = adapter->netdev;
2565 struct ixgbe_hw *hw = &adapter->hw;
2566 int i, j = 0;
2567 int num_rx_rings = adapter->num_rx_queues;
2568 int err;
2569 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2570 u32 txdctl, rxdctl, mhadd;
2571 u32 dmatxctl;
2572 u32 gpie;
2573
2574 ixgbe_get_hw_control(adapter);
2575
2576 if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) ||
2577 (adapter->flags & IXGBE_FLAG_MSI_ENABLED)) {
2578 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2579 gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
2580 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
2581 } else {
2582 /* MSI only */
2583 gpie = 0;
2584 }
2585 /* XXX: to interrupt immediately for EICS writes, enable this */
2586 /* gpie |= IXGBE_GPIE_EIMEN; */
2587 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2588 }
2589
2590 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
2591 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
2592 * specifically only auto mask tx and rx interrupts */
2593 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
2594 }
2595
2596 /* Enable fan failure interrupt if media type is copper */
2597 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2598 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2599 gpie |= IXGBE_SDP1_GPIEN;
2600 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2601 }
2602
2603 if (hw->mac.type == ixgbe_mac_82599EB) {
2604 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2605 gpie |= IXGBE_SDP1_GPIEN;
2606 gpie |= IXGBE_SDP2_GPIEN;
2607 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2608 }
2609
2610 #ifdef IXGBE_FCOE
2611 /* adjust max frame to be able to do baby jumbo for FCoE */
2612 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
2613 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
2614 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
2615
2616 #endif /* IXGBE_FCOE */
2617 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
2618 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
2619 mhadd &= ~IXGBE_MHADD_MFS_MASK;
2620 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
2621
2622 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
2623 }
2624
2625 for (i = 0; i < adapter->num_tx_queues; i++) {
2626 j = adapter->tx_ring[i].reg_idx;
2627 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2628 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
2629 txdctl |= (8 << 16);
2630 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2631 }
2632
2633 if (hw->mac.type == ixgbe_mac_82599EB) {
2634 /* DMATXCTL.EN must be set after all Tx queue config is done */
2635 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2636 dmatxctl |= IXGBE_DMATXCTL_TE;
2637 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2638 }
2639 for (i = 0; i < adapter->num_tx_queues; i++) {
2640 j = adapter->tx_ring[i].reg_idx;
2641 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2642 txdctl |= IXGBE_TXDCTL_ENABLE;
2643 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2644 }
2645
2646 for (i = 0; i < num_rx_rings; i++) {
2647 j = adapter->rx_ring[i].reg_idx;
2648 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2649 /* enable PTHRESH=32 descriptors (half the internal cache)
2650 * and HTHRESH=0 descriptors (to minimize latency on fetch),
2651 * this also removes a pesky rx_no_buffer_count increment */
2652 rxdctl |= 0x0020;
2653 rxdctl |= IXGBE_RXDCTL_ENABLE;
2654 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), rxdctl);
2655 if (hw->mac.type == ixgbe_mac_82599EB)
2656 ixgbe_rx_desc_queue_enable(adapter, i);
2657 }
2658 /* enable all receives */
2659 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2660 if (hw->mac.type == ixgbe_mac_82598EB)
2661 rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
2662 else
2663 rxdctl |= IXGBE_RXCTRL_RXEN;
2664 hw->mac.ops.enable_rx_dma(hw, rxdctl);
2665
2666 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2667 ixgbe_configure_msix(adapter);
2668 else
2669 ixgbe_configure_msi_and_legacy(adapter);
2670
2671 clear_bit(__IXGBE_DOWN, &adapter->state);
2672 ixgbe_napi_enable_all(adapter);
2673
2674 /* clear any pending interrupts, may auto mask */
2675 IXGBE_READ_REG(hw, IXGBE_EICR);
2676
2677 ixgbe_irq_enable(adapter);
2678
2679 /*
2680 * If this adapter has a fan, check to see if we had a failure
2681 * before we enabled the interrupt.
2682 */
2683 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2684 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
2685 if (esdp & IXGBE_ESDP_SDP1)
2686 DPRINTK(DRV, CRIT,
2687 "Fan has stopped, replace the adapter\n");
2688 }
2689
2690 /*
2691 * For hot-pluggable SFP+ devices, a new SFP+ module may have
2692 * arrived before interrupts were enabled but after probe. Such
2693 * devices wouldn't have their type identified yet. We need to
2694 * kick off the SFP+ module setup first, then try to bring up link.
2695 * If we're not hot-pluggable SFP+, we just need to configure link
2696 * and bring it up.
2697 */
2698 if (hw->phy.type == ixgbe_phy_unknown) {
2699 err = hw->phy.ops.identify(hw);
2700 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
2701 /*
2702 * Take the device down and schedule the sfp tasklet
2703 * which will unregister_netdev and log it.
2704 */
2705 ixgbe_down(adapter);
2706 schedule_work(&adapter->sfp_config_module_task);
2707 return err;
2708 }
2709 }
2710
2711 if (ixgbe_is_sfp(hw)) {
2712 ixgbe_sfp_link_config(adapter);
2713 } else {
2714 err = ixgbe_non_sfp_link_config(hw);
2715 if (err)
2716 DPRINTK(PROBE, ERR, "link_config FAILED %d\n", err);
2717 }
2718
2719 for (i = 0; i < adapter->num_tx_queues; i++)
2720 set_bit(__IXGBE_FDIR_INIT_DONE,
2721 &(adapter->tx_ring[i].reinit_state));
2722
2723 /* enable transmits */
2724 netif_tx_start_all_queues(netdev);
2725
2726 /* bring the link up in the watchdog, this could race with our first
2727 * link up interrupt but shouldn't be a problem */
2728 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2729 adapter->link_check_timeout = jiffies;
2730 mod_timer(&adapter->watchdog_timer, jiffies);
2731 return 0;
2732 }
2733
2734 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
2735 {
2736 WARN_ON(in_interrupt());
2737 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
2738 msleep(1);
2739 ixgbe_down(adapter);
2740 ixgbe_up(adapter);
2741 clear_bit(__IXGBE_RESETTING, &adapter->state);
2742 }
2743
2744 int ixgbe_up(struct ixgbe_adapter *adapter)
2745 {
2746 /* hardware has been reset, we need to reload some things */
2747 ixgbe_configure(adapter);
2748
2749 return ixgbe_up_complete(adapter);
2750 }
2751
2752 void ixgbe_reset(struct ixgbe_adapter *adapter)
2753 {
2754 struct ixgbe_hw *hw = &adapter->hw;
2755 int err;
2756
2757 err = hw->mac.ops.init_hw(hw);
2758 switch (err) {
2759 case 0:
2760 case IXGBE_ERR_SFP_NOT_PRESENT:
2761 break;
2762 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
2763 dev_err(&adapter->pdev->dev, "master disable timed out\n");
2764 break;
2765 case IXGBE_ERR_EEPROM_VERSION:
2766 /* We are running on a pre-production device, log a warning */
2767 dev_warn(&adapter->pdev->dev, "This device is a pre-production "
2768 "adapter/LOM. Please be aware there may be issues "
2769 "associated with your hardware. If you are "
2770 "experiencing problems please contact your Intel or "
2771 "hardware representative who provided you with this "
2772 "hardware.\n");
2773 break;
2774 default:
2775 dev_err(&adapter->pdev->dev, "Hardware Error: %d\n", err);
2776 }
2777
2778 /* reprogram the RAR[0] in case user changed it. */
2779 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
2780 }
2781
2782 /**
2783 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
2784 * @adapter: board private structure
2785 * @rx_ring: ring to free buffers from
2786 **/
2787 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
2788 struct ixgbe_ring *rx_ring)
2789 {
2790 struct pci_dev *pdev = adapter->pdev;
2791 unsigned long size;
2792 unsigned int i;
2793
2794 /* Free all the Rx ring sk_buffs */
2795
2796 for (i = 0; i < rx_ring->count; i++) {
2797 struct ixgbe_rx_buffer *rx_buffer_info;
2798
2799 rx_buffer_info = &rx_ring->rx_buffer_info[i];
2800 if (rx_buffer_info->dma) {
2801 pci_unmap_single(pdev, rx_buffer_info->dma,
2802 rx_ring->rx_buf_len,
2803 PCI_DMA_FROMDEVICE);
2804 rx_buffer_info->dma = 0;
2805 }
2806 if (rx_buffer_info->skb) {
2807 struct sk_buff *skb = rx_buffer_info->skb;
2808 rx_buffer_info->skb = NULL;
2809 do {
2810 struct sk_buff *this = skb;
2811 skb = skb->prev;
2812 dev_kfree_skb(this);
2813 } while (skb);
2814 }
2815 if (!rx_buffer_info->page)
2816 continue;
2817 if (rx_buffer_info->page_dma) {
2818 pci_unmap_page(pdev, rx_buffer_info->page_dma,
2819 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
2820 rx_buffer_info->page_dma = 0;
2821 }
2822 put_page(rx_buffer_info->page);
2823 rx_buffer_info->page = NULL;
2824 rx_buffer_info->page_offset = 0;
2825 }
2826
2827 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
2828 memset(rx_ring->rx_buffer_info, 0, size);
2829
2830 /* Zero out the descriptor ring */
2831 memset(rx_ring->desc, 0, rx_ring->size);
2832
2833 rx_ring->next_to_clean = 0;
2834 rx_ring->next_to_use = 0;
2835
2836 if (rx_ring->head)
2837 writel(0, adapter->hw.hw_addr + rx_ring->head);
2838 if (rx_ring->tail)
2839 writel(0, adapter->hw.hw_addr + rx_ring->tail);
2840 }
2841
2842 /**
2843 * ixgbe_clean_tx_ring - Free Tx Buffers
2844 * @adapter: board private structure
2845 * @tx_ring: ring to be cleaned
2846 **/
2847 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
2848 struct ixgbe_ring *tx_ring)
2849 {
2850 struct ixgbe_tx_buffer *tx_buffer_info;
2851 unsigned long size;
2852 unsigned int i;
2853
2854 /* Free all the Tx ring sk_buffs */
2855
2856 for (i = 0; i < tx_ring->count; i++) {
2857 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2858 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
2859 }
2860
2861 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
2862 memset(tx_ring->tx_buffer_info, 0, size);
2863
2864 /* Zero out the descriptor ring */
2865 memset(tx_ring->desc, 0, tx_ring->size);
2866
2867 tx_ring->next_to_use = 0;
2868 tx_ring->next_to_clean = 0;
2869
2870 if (tx_ring->head)
2871 writel(0, adapter->hw.hw_addr + tx_ring->head);
2872 if (tx_ring->tail)
2873 writel(0, adapter->hw.hw_addr + tx_ring->tail);
2874 }
2875
2876 /**
2877 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
2878 * @adapter: board private structure
2879 **/
2880 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
2881 {
2882 int i;
2883
2884 for (i = 0; i < adapter->num_rx_queues; i++)
2885 ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2886 }
2887
2888 /**
2889 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
2890 * @adapter: board private structure
2891 **/
2892 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
2893 {
2894 int i;
2895
2896 for (i = 0; i < adapter->num_tx_queues; i++)
2897 ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2898 }
2899
2900 void ixgbe_down(struct ixgbe_adapter *adapter)
2901 {
2902 struct net_device *netdev = adapter->netdev;
2903 struct ixgbe_hw *hw = &adapter->hw;
2904 u32 rxctrl;
2905 u32 txdctl;
2906 int i, j;
2907
2908 /* signal that we are down to the interrupt handler */
2909 set_bit(__IXGBE_DOWN, &adapter->state);
2910
2911 /* disable receives */
2912 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2913 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2914
2915 netif_tx_disable(netdev);
2916
2917 IXGBE_WRITE_FLUSH(hw);
2918 msleep(10);
2919
2920 netif_tx_stop_all_queues(netdev);
2921
2922 ixgbe_irq_disable(adapter);
2923
2924 ixgbe_napi_disable_all(adapter);
2925
2926 del_timer_sync(&adapter->watchdog_timer);
2927 cancel_work_sync(&adapter->watchdog_task);
2928
2929 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
2930 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
2931 cancel_work_sync(&adapter->fdir_reinit_task);
2932
2933 /* disable transmits in the hardware now that interrupts are off */
2934 for (i = 0; i < adapter->num_tx_queues; i++) {
2935 j = adapter->tx_ring[i].reg_idx;
2936 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2937 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
2938 (txdctl & ~IXGBE_TXDCTL_ENABLE));
2939 }
2940 /* Disable the Tx DMA engine on 82599 */
2941 if (hw->mac.type == ixgbe_mac_82599EB)
2942 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
2943 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
2944 ~IXGBE_DMATXCTL_TE));
2945
2946 netif_carrier_off(netdev);
2947
2948 if (!pci_channel_offline(adapter->pdev))
2949 ixgbe_reset(adapter);
2950 ixgbe_clean_all_tx_rings(adapter);
2951 ixgbe_clean_all_rx_rings(adapter);
2952
2953 #ifdef CONFIG_IXGBE_DCA
2954 /* since we reset the hardware DCA settings were cleared */
2955 ixgbe_setup_dca(adapter);
2956 #endif
2957 }
2958
2959 /**
2960 * ixgbe_poll - NAPI Rx polling callback
2961 * @napi: structure for representing this polling device
2962 * @budget: how many packets driver is allowed to clean
2963 *
2964 * This function is used for legacy and MSI, NAPI mode
2965 **/
2966 static int ixgbe_poll(struct napi_struct *napi, int budget)
2967 {
2968 struct ixgbe_q_vector *q_vector =
2969 container_of(napi, struct ixgbe_q_vector, napi);
2970 struct ixgbe_adapter *adapter = q_vector->adapter;
2971 int tx_clean_complete, work_done = 0;
2972
2973 #ifdef CONFIG_IXGBE_DCA
2974 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
2975 ixgbe_update_tx_dca(adapter, adapter->tx_ring);
2976 ixgbe_update_rx_dca(adapter, adapter->rx_ring);
2977 }
2978 #endif
2979
2980 tx_clean_complete = ixgbe_clean_tx_irq(q_vector, adapter->tx_ring);
2981 ixgbe_clean_rx_irq(q_vector, adapter->rx_ring, &work_done, budget);
2982
2983 if (!tx_clean_complete)
2984 work_done = budget;
2985
2986 /* If budget not fully consumed, exit the polling mode */
2987 if (work_done < budget) {
2988 napi_complete(napi);
2989 if (adapter->itr_setting & 1)
2990 ixgbe_set_itr(adapter);
2991 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2992 ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
2993 }
2994 return work_done;
2995 }
2996
2997 /**
2998 * ixgbe_tx_timeout - Respond to a Tx Hang
2999 * @netdev: network interface device structure
3000 **/
3001 static void ixgbe_tx_timeout(struct net_device *netdev)
3002 {
3003 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3004
3005 /* Do the reset outside of interrupt context */
3006 schedule_work(&adapter->reset_task);
3007 }
3008
3009 static void ixgbe_reset_task(struct work_struct *work)
3010 {
3011 struct ixgbe_adapter *adapter;
3012 adapter = container_of(work, struct ixgbe_adapter, reset_task);
3013
3014 /* If we're already down or resetting, just bail */
3015 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
3016 test_bit(__IXGBE_RESETTING, &adapter->state))
3017 return;
3018
3019 adapter->tx_timeout_count++;
3020
3021 ixgbe_reinit_locked(adapter);
3022 }
3023
3024 #ifdef CONFIG_IXGBE_DCB
3025 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
3026 {
3027 bool ret = false;
3028 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_DCB];
3029
3030 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
3031 return ret;
3032
3033 f->mask = 0x7 << 3;
3034 adapter->num_rx_queues = f->indices;
3035 adapter->num_tx_queues = f->indices;
3036 ret = true;
3037
3038 return ret;
3039 }
3040 #endif
3041
3042 /**
3043 * ixgbe_set_rss_queues: Allocate queues for RSS
3044 * @adapter: board private structure to initialize
3045 *
3046 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
3047 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
3048 *
3049 **/
3050 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
3051 {
3052 bool ret = false;
3053 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
3054
3055 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3056 f->mask = 0xF;
3057 adapter->num_rx_queues = f->indices;
3058 adapter->num_tx_queues = f->indices;
3059 ret = true;
3060 } else {
3061 ret = false;
3062 }
3063
3064 return ret;
3065 }
3066
3067 /**
3068 * ixgbe_set_fdir_queues: Allocate queues for Flow Director
3069 * @adapter: board private structure to initialize
3070 *
3071 * Flow Director is an advanced Rx filter, attempting to get Rx flows back
3072 * to the original CPU that initiated the Tx session. This runs in addition
3073 * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
3074 * Rx load across CPUs using RSS.
3075 *
3076 **/
3077 static bool inline ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
3078 {
3079 bool ret = false;
3080 struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
3081
3082 f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
3083 f_fdir->mask = 0;
3084
3085 /* Flow Director must have RSS enabled */
3086 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3087 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3088 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)))) {
3089 adapter->num_tx_queues = f_fdir->indices;
3090 adapter->num_rx_queues = f_fdir->indices;
3091 ret = true;
3092 } else {
3093 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3094 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3095 }
3096 return ret;
3097 }
3098
3099 #ifdef IXGBE_FCOE
3100 /**
3101 * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
3102 * @adapter: board private structure to initialize
3103 *
3104 * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
3105 * The ring feature mask is not used as a mask for FCoE, as it can take any 8
3106 * rx queues out of the max number of rx queues, instead, it is used as the
3107 * index of the first rx queue used by FCoE.
3108 *
3109 **/
3110 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
3111 {
3112 bool ret = false;
3113 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3114
3115 f->indices = min((int)num_online_cpus(), f->indices);
3116 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3117 #ifdef CONFIG_IXGBE_DCB
3118 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3119 DPRINTK(PROBE, INFO, "FCOE enabled with DCB \n");
3120 ixgbe_set_dcb_queues(adapter);
3121 }
3122 #endif
3123 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3124 DPRINTK(PROBE, INFO, "FCOE enabled with RSS \n");
3125 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3126 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3127 ixgbe_set_fdir_queues(adapter);
3128 else
3129 ixgbe_set_rss_queues(adapter);
3130 }
3131 /* adding FCoE rx rings to the end */
3132 f->mask = adapter->num_rx_queues;
3133 adapter->num_rx_queues += f->indices;
3134 if (adapter->num_tx_queues == 0)
3135 adapter->num_tx_queues = f->indices;
3136
3137 ret = true;
3138 }
3139
3140 return ret;
3141 }
3142
3143 #endif /* IXGBE_FCOE */
3144 /*
3145 * ixgbe_set_num_queues: Allocate queues for device, feature dependant
3146 * @adapter: board private structure to initialize
3147 *
3148 * This is the top level queue allocation routine. The order here is very
3149 * important, starting with the "most" number of features turned on at once,
3150 * and ending with the smallest set of features. This way large combinations
3151 * can be allocated if they're turned on, and smaller combinations are the
3152 * fallthrough conditions.
3153 *
3154 **/
3155 static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
3156 {
3157 #ifdef IXGBE_FCOE
3158 if (ixgbe_set_fcoe_queues(adapter))
3159 goto done;
3160
3161 #endif /* IXGBE_FCOE */
3162 #ifdef CONFIG_IXGBE_DCB
3163 if (ixgbe_set_dcb_queues(adapter))
3164 goto done;
3165
3166 #endif
3167 if (ixgbe_set_fdir_queues(adapter))
3168 goto done;
3169
3170 if (ixgbe_set_rss_queues(adapter))
3171 goto done;
3172
3173 /* fallback to base case */
3174 adapter->num_rx_queues = 1;
3175 adapter->num_tx_queues = 1;
3176
3177 done:
3178 /* Notify the stack of the (possibly) reduced Tx Queue count. */
3179 adapter->netdev->real_num_tx_queues = adapter->num_tx_queues;
3180 }
3181
3182 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
3183 int vectors)
3184 {
3185 int err, vector_threshold;
3186
3187 /* We'll want at least 3 (vector_threshold):
3188 * 1) TxQ[0] Cleanup
3189 * 2) RxQ[0] Cleanup
3190 * 3) Other (Link Status Change, etc.)
3191 * 4) TCP Timer (optional)
3192 */
3193 vector_threshold = MIN_MSIX_COUNT;
3194
3195 /* The more we get, the more we will assign to Tx/Rx Cleanup
3196 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
3197 * Right now, we simply care about how many we'll get; we'll
3198 * set them up later while requesting irq's.
3199 */
3200 while (vectors >= vector_threshold) {
3201 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
3202 vectors);
3203 if (!err) /* Success in acquiring all requested vectors. */
3204 break;
3205 else if (err < 0)
3206 vectors = 0; /* Nasty failure, quit now */
3207 else /* err == number of vectors we should try again with */
3208 vectors = err;
3209 }
3210
3211 if (vectors < vector_threshold) {
3212 /* Can't allocate enough MSI-X interrupts? Oh well.
3213 * This just means we'll go with either a single MSI
3214 * vector or fall back to legacy interrupts.
3215 */
3216 DPRINTK(HW, DEBUG, "Unable to allocate MSI-X interrupts\n");
3217 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3218 kfree(adapter->msix_entries);
3219 adapter->msix_entries = NULL;
3220 } else {
3221 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
3222 /*
3223 * Adjust for only the vectors we'll use, which is minimum
3224 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
3225 * vectors we were allocated.
3226 */
3227 adapter->num_msix_vectors = min(vectors,
3228 adapter->max_msix_q_vectors + NON_Q_VECTORS);
3229 }
3230 }
3231
3232 /**
3233 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
3234 * @adapter: board private structure to initialize
3235 *
3236 * Cache the descriptor ring offsets for RSS to the assigned rings.
3237 *
3238 **/
3239 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
3240 {
3241 int i;
3242 bool ret = false;
3243
3244 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3245 for (i = 0; i < adapter->num_rx_queues; i++)
3246 adapter->rx_ring[i].reg_idx = i;
3247 for (i = 0; i < adapter->num_tx_queues; i++)
3248 adapter->tx_ring[i].reg_idx = i;
3249 ret = true;
3250 } else {
3251 ret = false;
3252 }
3253
3254 return ret;
3255 }
3256
3257 #ifdef CONFIG_IXGBE_DCB
3258 /**
3259 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
3260 * @adapter: board private structure to initialize
3261 *
3262 * Cache the descriptor ring offsets for DCB to the assigned rings.
3263 *
3264 **/
3265 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
3266 {
3267 int i;
3268 bool ret = false;
3269 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
3270
3271 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3272 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
3273 /* the number of queues is assumed to be symmetric */
3274 for (i = 0; i < dcb_i; i++) {
3275 adapter->rx_ring[i].reg_idx = i << 3;
3276 adapter->tx_ring[i].reg_idx = i << 2;
3277 }
3278 ret = true;
3279 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
3280 if (dcb_i == 8) {
3281 /*
3282 * Tx TC0 starts at: descriptor queue 0
3283 * Tx TC1 starts at: descriptor queue 32
3284 * Tx TC2 starts at: descriptor queue 64
3285 * Tx TC3 starts at: descriptor queue 80
3286 * Tx TC4 starts at: descriptor queue 96
3287 * Tx TC5 starts at: descriptor queue 104
3288 * Tx TC6 starts at: descriptor queue 112
3289 * Tx TC7 starts at: descriptor queue 120
3290 *
3291 * Rx TC0-TC7 are offset by 16 queues each
3292 */
3293 for (i = 0; i < 3; i++) {
3294 adapter->tx_ring[i].reg_idx = i << 5;
3295 adapter->rx_ring[i].reg_idx = i << 4;
3296 }
3297 for ( ; i < 5; i++) {
3298 adapter->tx_ring[i].reg_idx =
3299 ((i + 2) << 4);
3300 adapter->rx_ring[i].reg_idx = i << 4;
3301 }
3302 for ( ; i < dcb_i; i++) {
3303 adapter->tx_ring[i].reg_idx =
3304 ((i + 8) << 3);
3305 adapter->rx_ring[i].reg_idx = i << 4;
3306 }
3307
3308 ret = true;
3309 } else if (dcb_i == 4) {
3310 /*
3311 * Tx TC0 starts at: descriptor queue 0
3312 * Tx TC1 starts at: descriptor queue 64
3313 * Tx TC2 starts at: descriptor queue 96
3314 * Tx TC3 starts at: descriptor queue 112
3315 *
3316 * Rx TC0-TC3 are offset by 32 queues each
3317 */
3318 adapter->tx_ring[0].reg_idx = 0;
3319 adapter->tx_ring[1].reg_idx = 64;
3320 adapter->tx_ring[2].reg_idx = 96;
3321 adapter->tx_ring[3].reg_idx = 112;
3322 for (i = 0 ; i < dcb_i; i++)
3323 adapter->rx_ring[i].reg_idx = i << 5;
3324
3325 ret = true;
3326 } else {
3327 ret = false;
3328 }
3329 } else {
3330 ret = false;
3331 }
3332 } else {
3333 ret = false;
3334 }
3335
3336 return ret;
3337 }
3338 #endif
3339
3340 /**
3341 * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
3342 * @adapter: board private structure to initialize
3343 *
3344 * Cache the descriptor ring offsets for Flow Director to the assigned rings.
3345 *
3346 **/
3347 static bool inline ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
3348 {
3349 int i;
3350 bool ret = false;
3351
3352 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3353 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3354 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))) {
3355 for (i = 0; i < adapter->num_rx_queues; i++)
3356 adapter->rx_ring[i].reg_idx = i;
3357 for (i = 0; i < adapter->num_tx_queues; i++)
3358 adapter->tx_ring[i].reg_idx = i;
3359 ret = true;
3360 }
3361
3362 return ret;
3363 }
3364
3365 #ifdef IXGBE_FCOE
3366 /**
3367 * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
3368 * @adapter: board private structure to initialize
3369 *
3370 * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
3371 *
3372 */
3373 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
3374 {
3375 int i, fcoe_i = 0;
3376 bool ret = false;
3377 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3378
3379 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3380 #ifdef CONFIG_IXGBE_DCB
3381 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3382 ixgbe_cache_ring_dcb(adapter);
3383 fcoe_i = adapter->rx_ring[0].reg_idx + 1;
3384 }
3385 #endif /* CONFIG_IXGBE_DCB */
3386 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3387 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3388 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3389 ixgbe_cache_ring_fdir(adapter);
3390 else
3391 ixgbe_cache_ring_rss(adapter);
3392
3393 fcoe_i = f->mask;
3394 }
3395 for (i = 0; i < f->indices; i++, fcoe_i++)
3396 adapter->rx_ring[f->mask + i].reg_idx = fcoe_i;
3397 ret = true;
3398 }
3399 return ret;
3400 }
3401
3402 #endif /* IXGBE_FCOE */
3403 /**
3404 * ixgbe_cache_ring_register - Descriptor ring to register mapping
3405 * @adapter: board private structure to initialize
3406 *
3407 * Once we know the feature-set enabled for the device, we'll cache
3408 * the register offset the descriptor ring is assigned to.
3409 *
3410 * Note, the order the various feature calls is important. It must start with
3411 * the "most" features enabled at the same time, then trickle down to the
3412 * least amount of features turned on at once.
3413 **/
3414 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
3415 {
3416 /* start with default case */
3417 adapter->rx_ring[0].reg_idx = 0;
3418 adapter->tx_ring[0].reg_idx = 0;
3419
3420 #ifdef IXGBE_FCOE
3421 if (ixgbe_cache_ring_fcoe(adapter))
3422 return;
3423
3424 #endif /* IXGBE_FCOE */
3425 #ifdef CONFIG_IXGBE_DCB
3426 if (ixgbe_cache_ring_dcb(adapter))
3427 return;
3428
3429 #endif
3430 if (ixgbe_cache_ring_fdir(adapter))
3431 return;
3432
3433 if (ixgbe_cache_ring_rss(adapter))
3434 return;
3435 }
3436
3437 /**
3438 * ixgbe_alloc_queues - Allocate memory for all rings
3439 * @adapter: board private structure to initialize
3440 *
3441 * We allocate one ring per queue at run-time since we don't know the
3442 * number of queues at compile-time. The polling_netdev array is
3443 * intended for Multiqueue, but should work fine with a single queue.
3444 **/
3445 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
3446 {
3447 int i;
3448
3449 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
3450 sizeof(struct ixgbe_ring), GFP_KERNEL);
3451 if (!adapter->tx_ring)
3452 goto err_tx_ring_allocation;
3453
3454 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
3455 sizeof(struct ixgbe_ring), GFP_KERNEL);
3456 if (!adapter->rx_ring)
3457 goto err_rx_ring_allocation;
3458
3459 for (i = 0; i < adapter->num_tx_queues; i++) {
3460 adapter->tx_ring[i].count = adapter->tx_ring_count;
3461 adapter->tx_ring[i].queue_index = i;
3462 }
3463
3464 for (i = 0; i < adapter->num_rx_queues; i++) {
3465 adapter->rx_ring[i].count = adapter->rx_ring_count;
3466 adapter->rx_ring[i].queue_index = i;
3467 }
3468
3469 ixgbe_cache_ring_register(adapter);
3470
3471 return 0;
3472
3473 err_rx_ring_allocation:
3474 kfree(adapter->tx_ring);
3475 err_tx_ring_allocation:
3476 return -ENOMEM;
3477 }
3478
3479 /**
3480 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
3481 * @adapter: board private structure to initialize
3482 *
3483 * Attempt to configure the interrupts using the best available
3484 * capabilities of the hardware and the kernel.
3485 **/
3486 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
3487 {
3488 struct ixgbe_hw *hw = &adapter->hw;
3489 int err = 0;
3490 int vector, v_budget;
3491
3492 /*
3493 * It's easy to be greedy for MSI-X vectors, but it really
3494 * doesn't do us much good if we have a lot more vectors
3495 * than CPU's. So let's be conservative and only ask for
3496 * (roughly) twice the number of vectors as there are CPU's.
3497 */
3498 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
3499 (int)(num_online_cpus() * 2)) + NON_Q_VECTORS;
3500
3501 /*
3502 * At the same time, hardware can only support a maximum of
3503 * hw.mac->max_msix_vectors vectors. With features
3504 * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
3505 * descriptor queues supported by our device. Thus, we cap it off in
3506 * those rare cases where the cpu count also exceeds our vector limit.
3507 */
3508 v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
3509
3510 /* A failure in MSI-X entry allocation isn't fatal, but it does
3511 * mean we disable MSI-X capabilities of the adapter. */
3512 adapter->msix_entries = kcalloc(v_budget,
3513 sizeof(struct msix_entry), GFP_KERNEL);
3514 if (adapter->msix_entries) {
3515 for (vector = 0; vector < v_budget; vector++)
3516 adapter->msix_entries[vector].entry = vector;
3517
3518 ixgbe_acquire_msix_vectors(adapter, v_budget);
3519
3520 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3521 goto out;
3522 }
3523
3524 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
3525 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
3526 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3527 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3528 adapter->atr_sample_rate = 0;
3529 ixgbe_set_num_queues(adapter);
3530
3531 err = pci_enable_msi(adapter->pdev);
3532 if (!err) {
3533 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
3534 } else {
3535 DPRINTK(HW, DEBUG, "Unable to allocate MSI interrupt, "
3536 "falling back to legacy. Error: %d\n", err);
3537 /* reset err */
3538 err = 0;
3539 }
3540
3541 out:
3542 return err;
3543 }
3544
3545 /**
3546 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
3547 * @adapter: board private structure to initialize
3548 *
3549 * We allocate one q_vector per queue interrupt. If allocation fails we
3550 * return -ENOMEM.
3551 **/
3552 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
3553 {
3554 int q_idx, num_q_vectors;
3555 struct ixgbe_q_vector *q_vector;
3556 int napi_vectors;
3557 int (*poll)(struct napi_struct *, int);
3558
3559 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3560 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3561 napi_vectors = adapter->num_rx_queues;
3562 poll = &ixgbe_clean_rxtx_many;
3563 } else {
3564 num_q_vectors = 1;
3565 napi_vectors = 1;
3566 poll = &ixgbe_poll;
3567 }
3568
3569 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3570 q_vector = kzalloc(sizeof(struct ixgbe_q_vector), GFP_KERNEL);
3571 if (!q_vector)
3572 goto err_out;
3573 q_vector->adapter = adapter;
3574 q_vector->eitr = adapter->eitr_param;
3575 q_vector->v_idx = q_idx;
3576 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
3577 adapter->q_vector[q_idx] = q_vector;
3578 }
3579
3580 return 0;
3581
3582 err_out:
3583 while (q_idx) {
3584 q_idx--;
3585 q_vector = adapter->q_vector[q_idx];
3586 netif_napi_del(&q_vector->napi);
3587 kfree(q_vector);
3588 adapter->q_vector[q_idx] = NULL;
3589 }
3590 return -ENOMEM;
3591 }
3592
3593 /**
3594 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
3595 * @adapter: board private structure to initialize
3596 *
3597 * This function frees the memory allocated to the q_vectors. In addition if
3598 * NAPI is enabled it will delete any references to the NAPI struct prior
3599 * to freeing the q_vector.
3600 **/
3601 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
3602 {
3603 int q_idx, num_q_vectors;
3604
3605 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3606 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3607 else
3608 num_q_vectors = 1;
3609
3610 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3611 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
3612 adapter->q_vector[q_idx] = NULL;
3613 netif_napi_del(&q_vector->napi);
3614 kfree(q_vector);
3615 }
3616 }
3617
3618 void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
3619 {
3620 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3621 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3622 pci_disable_msix(adapter->pdev);
3623 kfree(adapter->msix_entries);
3624 adapter->msix_entries = NULL;
3625 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
3626 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
3627 pci_disable_msi(adapter->pdev);
3628 }
3629 return;
3630 }
3631
3632 /**
3633 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
3634 * @adapter: board private structure to initialize
3635 *
3636 * We determine which interrupt scheme to use based on...
3637 * - Kernel support (MSI, MSI-X)
3638 * - which can be user-defined (via MODULE_PARAM)
3639 * - Hardware queue count (num_*_queues)
3640 * - defined by miscellaneous hardware support/features (RSS, etc.)
3641 **/
3642 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
3643 {
3644 int err;
3645
3646 /* Number of supported queues */
3647 ixgbe_set_num_queues(adapter);
3648
3649 err = ixgbe_set_interrupt_capability(adapter);
3650 if (err) {
3651 DPRINTK(PROBE, ERR, "Unable to setup interrupt capabilities\n");
3652 goto err_set_interrupt;
3653 }
3654
3655 err = ixgbe_alloc_q_vectors(adapter);
3656 if (err) {
3657 DPRINTK(PROBE, ERR, "Unable to allocate memory for queue "
3658 "vectors\n");
3659 goto err_alloc_q_vectors;
3660 }
3661
3662 err = ixgbe_alloc_queues(adapter);
3663 if (err) {
3664 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
3665 goto err_alloc_queues;
3666 }
3667
3668 DPRINTK(DRV, INFO, "Multiqueue %s: Rx Queue count = %u, "
3669 "Tx Queue count = %u\n",
3670 (adapter->num_rx_queues > 1) ? "Enabled" :
3671 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
3672
3673 set_bit(__IXGBE_DOWN, &adapter->state);
3674
3675 return 0;
3676
3677 err_alloc_queues:
3678 ixgbe_free_q_vectors(adapter);
3679 err_alloc_q_vectors:
3680 ixgbe_reset_interrupt_capability(adapter);
3681 err_set_interrupt:
3682 return err;
3683 }
3684
3685 /**
3686 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
3687 * @adapter: board private structure to clear interrupt scheme on
3688 *
3689 * We go through and clear interrupt specific resources and reset the structure
3690 * to pre-load conditions
3691 **/
3692 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
3693 {
3694 kfree(adapter->tx_ring);
3695 kfree(adapter->rx_ring);
3696 adapter->tx_ring = NULL;
3697 adapter->rx_ring = NULL;
3698
3699 ixgbe_free_q_vectors(adapter);
3700 ixgbe_reset_interrupt_capability(adapter);
3701 }
3702
3703 /**
3704 * ixgbe_sfp_timer - worker thread to find a missing module
3705 * @data: pointer to our adapter struct
3706 **/
3707 static void ixgbe_sfp_timer(unsigned long data)
3708 {
3709 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
3710
3711 /*
3712 * Do the sfp_timer outside of interrupt context due to the
3713 * delays that sfp+ detection requires
3714 */
3715 schedule_work(&adapter->sfp_task);
3716 }
3717
3718 /**
3719 * ixgbe_sfp_task - worker thread to find a missing module
3720 * @work: pointer to work_struct containing our data
3721 **/
3722 static void ixgbe_sfp_task(struct work_struct *work)
3723 {
3724 struct ixgbe_adapter *adapter = container_of(work,
3725 struct ixgbe_adapter,
3726 sfp_task);
3727 struct ixgbe_hw *hw = &adapter->hw;
3728
3729 if ((hw->phy.type == ixgbe_phy_nl) &&
3730 (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
3731 s32 ret = hw->phy.ops.identify_sfp(hw);
3732 if (ret == IXGBE_ERR_SFP_NOT_PRESENT)
3733 goto reschedule;
3734 ret = hw->phy.ops.reset(hw);
3735 if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
3736 dev_err(&adapter->pdev->dev, "failed to initialize "
3737 "because an unsupported SFP+ module type "
3738 "was detected.\n"
3739 "Reload the driver after installing a "
3740 "supported module.\n");
3741 unregister_netdev(adapter->netdev);
3742 } else {
3743 DPRINTK(PROBE, INFO, "detected SFP+: %d\n",
3744 hw->phy.sfp_type);
3745 }
3746 /* don't need this routine any more */
3747 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3748 }
3749 return;
3750 reschedule:
3751 if (test_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state))
3752 mod_timer(&adapter->sfp_timer,
3753 round_jiffies(jiffies + (2 * HZ)));
3754 }
3755
3756 /**
3757 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
3758 * @adapter: board private structure to initialize
3759 *
3760 * ixgbe_sw_init initializes the Adapter private data structure.
3761 * Fields are initialized based on PCI device information and
3762 * OS network device settings (MTU size).
3763 **/
3764 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
3765 {
3766 struct ixgbe_hw *hw = &adapter->hw;
3767 struct pci_dev *pdev = adapter->pdev;
3768 unsigned int rss;
3769 #ifdef CONFIG_IXGBE_DCB
3770 int j;
3771 struct tc_configuration *tc;
3772 #endif
3773
3774 /* PCI config space info */
3775
3776 hw->vendor_id = pdev->vendor;
3777 hw->device_id = pdev->device;
3778 hw->revision_id = pdev->revision;
3779 hw->subsystem_vendor_id = pdev->subsystem_vendor;
3780 hw->subsystem_device_id = pdev->subsystem_device;
3781
3782 /* Set capability flags */
3783 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
3784 adapter->ring_feature[RING_F_RSS].indices = rss;
3785 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
3786 adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
3787 if (hw->mac.type == ixgbe_mac_82598EB) {
3788 if (hw->device_id == IXGBE_DEV_ID_82598AT)
3789 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
3790 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
3791 } else if (hw->mac.type == ixgbe_mac_82599EB) {
3792 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
3793 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
3794 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
3795 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
3796 adapter->ring_feature[RING_F_FDIR].indices =
3797 IXGBE_MAX_FDIR_INDICES;
3798 adapter->atr_sample_rate = 20;
3799 adapter->fdir_pballoc = 0;
3800 #ifdef IXGBE_FCOE
3801 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
3802 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
3803 adapter->ring_feature[RING_F_FCOE].indices = 0;
3804 #endif /* IXGBE_FCOE */
3805 }
3806
3807 #ifdef CONFIG_IXGBE_DCB
3808 /* Configure DCB traffic classes */
3809 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
3810 tc = &adapter->dcb_cfg.tc_config[j];
3811 tc->path[DCB_TX_CONFIG].bwg_id = 0;
3812 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
3813 tc->path[DCB_RX_CONFIG].bwg_id = 0;
3814 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
3815 tc->dcb_pfc = pfc_disabled;
3816 }
3817 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
3818 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
3819 adapter->dcb_cfg.rx_pba_cfg = pba_equal;
3820 adapter->dcb_cfg.pfc_mode_enable = false;
3821 adapter->dcb_cfg.round_robin_enable = false;
3822 adapter->dcb_set_bitmap = 0x00;
3823 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
3824 adapter->ring_feature[RING_F_DCB].indices);
3825
3826 #endif
3827
3828 /* default flow control settings */
3829 hw->fc.requested_mode = ixgbe_fc_full;
3830 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
3831 #ifdef CONFIG_DCB
3832 adapter->last_lfc_mode = hw->fc.current_mode;
3833 #endif
3834 hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
3835 hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
3836 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
3837 hw->fc.send_xon = true;
3838 hw->fc.disable_fc_autoneg = false;
3839
3840 /* enable itr by default in dynamic mode */
3841 adapter->itr_setting = 1;
3842 adapter->eitr_param = 20000;
3843
3844 /* set defaults for eitr in MegaBytes */
3845 adapter->eitr_low = 10;
3846 adapter->eitr_high = 20;
3847
3848 /* set default ring sizes */
3849 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
3850 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
3851
3852 /* initialize eeprom parameters */
3853 if (ixgbe_init_eeprom_params_generic(hw)) {
3854 dev_err(&pdev->dev, "EEPROM initialization failed\n");
3855 return -EIO;
3856 }
3857
3858 /* enable rx csum by default */
3859 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
3860
3861 set_bit(__IXGBE_DOWN, &adapter->state);
3862
3863 return 0;
3864 }
3865
3866 /**
3867 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
3868 * @adapter: board private structure
3869 * @tx_ring: tx descriptor ring (for a specific queue) to setup
3870 *
3871 * Return 0 on success, negative on failure
3872 **/
3873 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
3874 struct ixgbe_ring *tx_ring)
3875 {
3876 struct pci_dev *pdev = adapter->pdev;
3877 int size;
3878
3879 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
3880 tx_ring->tx_buffer_info = vmalloc(size);
3881 if (!tx_ring->tx_buffer_info)
3882 goto err;
3883 memset(tx_ring->tx_buffer_info, 0, size);
3884
3885 /* round up to nearest 4K */
3886 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
3887 tx_ring->size = ALIGN(tx_ring->size, 4096);
3888
3889 tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
3890 &tx_ring->dma);
3891 if (!tx_ring->desc)
3892 goto err;
3893
3894 tx_ring->next_to_use = 0;
3895 tx_ring->next_to_clean = 0;
3896 tx_ring->work_limit = tx_ring->count;
3897 return 0;
3898
3899 err:
3900 vfree(tx_ring->tx_buffer_info);
3901 tx_ring->tx_buffer_info = NULL;
3902 DPRINTK(PROBE, ERR, "Unable to allocate memory for the transmit "
3903 "descriptor ring\n");
3904 return -ENOMEM;
3905 }
3906
3907 /**
3908 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
3909 * @adapter: board private structure
3910 *
3911 * If this function returns with an error, then it's possible one or
3912 * more of the rings is populated (while the rest are not). It is the
3913 * callers duty to clean those orphaned rings.
3914 *
3915 * Return 0 on success, negative on failure
3916 **/
3917 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
3918 {
3919 int i, err = 0;
3920
3921 for (i = 0; i < adapter->num_tx_queues; i++) {
3922 err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]);
3923 if (!err)
3924 continue;
3925 DPRINTK(PROBE, ERR, "Allocation for Tx Queue %u failed\n", i);
3926 break;
3927 }
3928
3929 return err;
3930 }
3931
3932 /**
3933 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
3934 * @adapter: board private structure
3935 * @rx_ring: rx descriptor ring (for a specific queue) to setup
3936 *
3937 * Returns 0 on success, negative on failure
3938 **/
3939 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
3940 struct ixgbe_ring *rx_ring)
3941 {
3942 struct pci_dev *pdev = adapter->pdev;
3943 int size;
3944
3945 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
3946 rx_ring->rx_buffer_info = vmalloc(size);
3947 if (!rx_ring->rx_buffer_info) {
3948 DPRINTK(PROBE, ERR,
3949 "vmalloc allocation failed for the rx desc ring\n");
3950 goto alloc_failed;
3951 }
3952 memset(rx_ring->rx_buffer_info, 0, size);
3953
3954 /* Round up to nearest 4K */
3955 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
3956 rx_ring->size = ALIGN(rx_ring->size, 4096);
3957
3958 rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size, &rx_ring->dma);
3959
3960 if (!rx_ring->desc) {
3961 DPRINTK(PROBE, ERR,
3962 "Memory allocation failed for the rx desc ring\n");
3963 vfree(rx_ring->rx_buffer_info);
3964 goto alloc_failed;
3965 }
3966
3967 rx_ring->next_to_clean = 0;
3968 rx_ring->next_to_use = 0;
3969
3970 return 0;
3971
3972 alloc_failed:
3973 return -ENOMEM;
3974 }
3975
3976 /**
3977 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
3978 * @adapter: board private structure
3979 *
3980 * If this function returns with an error, then it's possible one or
3981 * more of the rings is populated (while the rest are not). It is the
3982 * callers duty to clean those orphaned rings.
3983 *
3984 * Return 0 on success, negative on failure
3985 **/
3986
3987 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
3988 {
3989 int i, err = 0;
3990
3991 for (i = 0; i < adapter->num_rx_queues; i++) {
3992 err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]);
3993 if (!err)
3994 continue;
3995 DPRINTK(PROBE, ERR, "Allocation for Rx Queue %u failed\n", i);
3996 break;
3997 }
3998
3999 return err;
4000 }
4001
4002 /**
4003 * ixgbe_free_tx_resources - Free Tx Resources per Queue
4004 * @adapter: board private structure
4005 * @tx_ring: Tx descriptor ring for a specific queue
4006 *
4007 * Free all transmit software resources
4008 **/
4009 void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
4010 struct ixgbe_ring *tx_ring)
4011 {
4012 struct pci_dev *pdev = adapter->pdev;
4013
4014 ixgbe_clean_tx_ring(adapter, tx_ring);
4015
4016 vfree(tx_ring->tx_buffer_info);
4017 tx_ring->tx_buffer_info = NULL;
4018
4019 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
4020
4021 tx_ring->desc = NULL;
4022 }
4023
4024 /**
4025 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
4026 * @adapter: board private structure
4027 *
4028 * Free all transmit software resources
4029 **/
4030 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
4031 {
4032 int i;
4033
4034 for (i = 0; i < adapter->num_tx_queues; i++)
4035 if (adapter->tx_ring[i].desc)
4036 ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
4037 }
4038
4039 /**
4040 * ixgbe_free_rx_resources - Free Rx Resources
4041 * @adapter: board private structure
4042 * @rx_ring: ring to clean the resources from
4043 *
4044 * Free all receive software resources
4045 **/
4046 void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
4047 struct ixgbe_ring *rx_ring)
4048 {
4049 struct pci_dev *pdev = adapter->pdev;
4050
4051 ixgbe_clean_rx_ring(adapter, rx_ring);
4052
4053 vfree(rx_ring->rx_buffer_info);
4054 rx_ring->rx_buffer_info = NULL;
4055
4056 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
4057
4058 rx_ring->desc = NULL;
4059 }
4060
4061 /**
4062 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
4063 * @adapter: board private structure
4064 *
4065 * Free all receive software resources
4066 **/
4067 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
4068 {
4069 int i;
4070
4071 for (i = 0; i < adapter->num_rx_queues; i++)
4072 if (adapter->rx_ring[i].desc)
4073 ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
4074 }
4075
4076 /**
4077 * ixgbe_change_mtu - Change the Maximum Transfer Unit
4078 * @netdev: network interface device structure
4079 * @new_mtu: new value for maximum frame size
4080 *
4081 * Returns 0 on success, negative on failure
4082 **/
4083 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
4084 {
4085 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4086 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4087
4088 /* MTU < 68 is an error and causes problems on some kernels */
4089 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
4090 return -EINVAL;
4091
4092 DPRINTK(PROBE, INFO, "changing MTU from %d to %d\n",
4093 netdev->mtu, new_mtu);
4094 /* must set new MTU before calling down or up */
4095 netdev->mtu = new_mtu;
4096
4097 if (netif_running(netdev))
4098 ixgbe_reinit_locked(adapter);
4099
4100 return 0;
4101 }
4102
4103 /**
4104 * ixgbe_open - Called when a network interface is made active
4105 * @netdev: network interface device structure
4106 *
4107 * Returns 0 on success, negative value on failure
4108 *
4109 * The open entry point is called when a network interface is made
4110 * active by the system (IFF_UP). At this point all resources needed
4111 * for transmit and receive operations are allocated, the interrupt
4112 * handler is registered with the OS, the watchdog timer is started,
4113 * and the stack is notified that the interface is ready.
4114 **/
4115 static int ixgbe_open(struct net_device *netdev)
4116 {
4117 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4118 int err;
4119
4120 /* disallow open during test */
4121 if (test_bit(__IXGBE_TESTING, &adapter->state))
4122 return -EBUSY;
4123
4124 netif_carrier_off(netdev);
4125
4126 /* allocate transmit descriptors */
4127 err = ixgbe_setup_all_tx_resources(adapter);
4128 if (err)
4129 goto err_setup_tx;
4130
4131 /* allocate receive descriptors */
4132 err = ixgbe_setup_all_rx_resources(adapter);
4133 if (err)
4134 goto err_setup_rx;
4135
4136 ixgbe_configure(adapter);
4137
4138 err = ixgbe_request_irq(adapter);
4139 if (err)
4140 goto err_req_irq;
4141
4142 err = ixgbe_up_complete(adapter);
4143 if (err)
4144 goto err_up;
4145
4146 netif_tx_start_all_queues(netdev);
4147
4148 return 0;
4149
4150 err_up:
4151 ixgbe_release_hw_control(adapter);
4152 ixgbe_free_irq(adapter);
4153 err_req_irq:
4154 err_setup_rx:
4155 ixgbe_free_all_rx_resources(adapter);
4156 err_setup_tx:
4157 ixgbe_free_all_tx_resources(adapter);
4158 ixgbe_reset(adapter);
4159
4160 return err;
4161 }
4162
4163 /**
4164 * ixgbe_close - Disables a network interface
4165 * @netdev: network interface device structure
4166 *
4167 * Returns 0, this is not allowed to fail
4168 *
4169 * The close entry point is called when an interface is de-activated
4170 * by the OS. The hardware is still under the drivers control, but
4171 * needs to be disabled. A global MAC reset is issued to stop the
4172 * hardware, and all transmit and receive resources are freed.
4173 **/
4174 static int ixgbe_close(struct net_device *netdev)
4175 {
4176 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4177
4178 ixgbe_down(adapter);
4179 ixgbe_free_irq(adapter);
4180
4181 ixgbe_free_all_tx_resources(adapter);
4182 ixgbe_free_all_rx_resources(adapter);
4183
4184 ixgbe_release_hw_control(adapter);
4185
4186 return 0;
4187 }
4188
4189 #ifdef CONFIG_PM
4190 static int ixgbe_resume(struct pci_dev *pdev)
4191 {
4192 struct net_device *netdev = pci_get_drvdata(pdev);
4193 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4194 u32 err;
4195
4196 pci_set_power_state(pdev, PCI_D0);
4197 pci_restore_state(pdev);
4198
4199 err = pci_enable_device_mem(pdev);
4200 if (err) {
4201 printk(KERN_ERR "ixgbe: Cannot enable PCI device from "
4202 "suspend\n");
4203 return err;
4204 }
4205 pci_set_master(pdev);
4206
4207 pci_wake_from_d3(pdev, false);
4208
4209 err = ixgbe_init_interrupt_scheme(adapter);
4210 if (err) {
4211 printk(KERN_ERR "ixgbe: Cannot initialize interrupts for "
4212 "device\n");
4213 return err;
4214 }
4215
4216 ixgbe_reset(adapter);
4217
4218 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
4219
4220 if (netif_running(netdev)) {
4221 err = ixgbe_open(adapter->netdev);
4222 if (err)
4223 return err;
4224 }
4225
4226 netif_device_attach(netdev);
4227
4228 return 0;
4229 }
4230 #endif /* CONFIG_PM */
4231
4232 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
4233 {
4234 struct net_device *netdev = pci_get_drvdata(pdev);
4235 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4236 struct ixgbe_hw *hw = &adapter->hw;
4237 u32 ctrl, fctrl;
4238 u32 wufc = adapter->wol;
4239 #ifdef CONFIG_PM
4240 int retval = 0;
4241 #endif
4242
4243 netif_device_detach(netdev);
4244
4245 if (netif_running(netdev)) {
4246 ixgbe_down(adapter);
4247 ixgbe_free_irq(adapter);
4248 ixgbe_free_all_tx_resources(adapter);
4249 ixgbe_free_all_rx_resources(adapter);
4250 }
4251 ixgbe_clear_interrupt_scheme(adapter);
4252
4253 #ifdef CONFIG_PM
4254 retval = pci_save_state(pdev);
4255 if (retval)
4256 return retval;
4257
4258 #endif
4259 if (wufc) {
4260 ixgbe_set_rx_mode(netdev);
4261
4262 /* turn on all-multi mode if wake on multicast is enabled */
4263 if (wufc & IXGBE_WUFC_MC) {
4264 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4265 fctrl |= IXGBE_FCTRL_MPE;
4266 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
4267 }
4268
4269 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
4270 ctrl |= IXGBE_CTRL_GIO_DIS;
4271 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
4272
4273 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
4274 } else {
4275 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
4276 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
4277 }
4278
4279 if (wufc && hw->mac.type == ixgbe_mac_82599EB)
4280 pci_wake_from_d3(pdev, true);
4281 else
4282 pci_wake_from_d3(pdev, false);
4283
4284 *enable_wake = !!wufc;
4285
4286 ixgbe_release_hw_control(adapter);
4287
4288 pci_disable_device(pdev);
4289
4290 return 0;
4291 }
4292
4293 #ifdef CONFIG_PM
4294 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
4295 {
4296 int retval;
4297 bool wake;
4298
4299 retval = __ixgbe_shutdown(pdev, &wake);
4300 if (retval)
4301 return retval;
4302
4303 if (wake) {
4304 pci_prepare_to_sleep(pdev);
4305 } else {
4306 pci_wake_from_d3(pdev, false);
4307 pci_set_power_state(pdev, PCI_D3hot);
4308 }
4309
4310 return 0;
4311 }
4312 #endif /* CONFIG_PM */
4313
4314 static void ixgbe_shutdown(struct pci_dev *pdev)
4315 {
4316 bool wake;
4317
4318 __ixgbe_shutdown(pdev, &wake);
4319
4320 if (system_state == SYSTEM_POWER_OFF) {
4321 pci_wake_from_d3(pdev, wake);
4322 pci_set_power_state(pdev, PCI_D3hot);
4323 }
4324 }
4325
4326 /**
4327 * ixgbe_update_stats - Update the board statistics counters.
4328 * @adapter: board private structure
4329 **/
4330 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
4331 {
4332 struct ixgbe_hw *hw = &adapter->hw;
4333 u64 total_mpc = 0;
4334 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
4335
4336 if (hw->mac.type == ixgbe_mac_82599EB) {
4337 u64 rsc_count = 0;
4338 for (i = 0; i < 16; i++)
4339 adapter->hw_rx_no_dma_resources +=
4340 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4341 for (i = 0; i < adapter->num_rx_queues; i++)
4342 rsc_count += adapter->rx_ring[i].rsc_count;
4343 adapter->rsc_count = rsc_count;
4344 }
4345
4346 adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
4347 for (i = 0; i < 8; i++) {
4348 /* for packet buffers not used, the register should read 0 */
4349 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
4350 missed_rx += mpc;
4351 adapter->stats.mpc[i] += mpc;
4352 total_mpc += adapter->stats.mpc[i];
4353 if (hw->mac.type == ixgbe_mac_82598EB)
4354 adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
4355 adapter->stats.qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
4356 adapter->stats.qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
4357 adapter->stats.qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
4358 adapter->stats.qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
4359 if (hw->mac.type == ixgbe_mac_82599EB) {
4360 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4361 IXGBE_PXONRXCNT(i));
4362 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4363 IXGBE_PXOFFRXCNT(i));
4364 adapter->stats.qprdc[i] += IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4365 } else {
4366 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4367 IXGBE_PXONRXC(i));
4368 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4369 IXGBE_PXOFFRXC(i));
4370 }
4371 adapter->stats.pxontxc[i] += IXGBE_READ_REG(hw,
4372 IXGBE_PXONTXC(i));
4373 adapter->stats.pxofftxc[i] += IXGBE_READ_REG(hw,
4374 IXGBE_PXOFFTXC(i));
4375 }
4376 adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
4377 /* work around hardware counting issue */
4378 adapter->stats.gprc -= missed_rx;
4379
4380 /* 82598 hardware only has a 32 bit counter in the high register */
4381 if (hw->mac.type == ixgbe_mac_82599EB) {
4382 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
4383 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
4384 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
4385 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
4386 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORL);
4387 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
4388 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
4389 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
4390 adapter->stats.fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
4391 adapter->stats.fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
4392 #ifdef IXGBE_FCOE
4393 adapter->stats.fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
4394 adapter->stats.fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
4395 adapter->stats.fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
4396 adapter->stats.fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
4397 adapter->stats.fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
4398 adapter->stats.fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
4399 #endif /* IXGBE_FCOE */
4400 } else {
4401 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
4402 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
4403 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
4404 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
4405 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
4406 }
4407 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
4408 adapter->stats.bprc += bprc;
4409 adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
4410 if (hw->mac.type == ixgbe_mac_82598EB)
4411 adapter->stats.mprc -= bprc;
4412 adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
4413 adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
4414 adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
4415 adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
4416 adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
4417 adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
4418 adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
4419 adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
4420 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
4421 adapter->stats.lxontxc += lxon;
4422 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
4423 adapter->stats.lxofftxc += lxoff;
4424 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4425 adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
4426 adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
4427 /*
4428 * 82598 errata - tx of flow control packets is included in tx counters
4429 */
4430 xon_off_tot = lxon + lxoff;
4431 adapter->stats.gptc -= xon_off_tot;
4432 adapter->stats.mptc -= xon_off_tot;
4433 adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
4434 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4435 adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
4436 adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
4437 adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
4438 adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
4439 adapter->stats.ptc64 -= xon_off_tot;
4440 adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
4441 adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
4442 adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
4443 adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
4444 adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
4445 adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
4446
4447 /* Fill out the OS statistics structure */
4448 adapter->net_stats.multicast = adapter->stats.mprc;
4449
4450 /* Rx Errors */
4451 adapter->net_stats.rx_errors = adapter->stats.crcerrs +
4452 adapter->stats.rlec;
4453 adapter->net_stats.rx_dropped = 0;
4454 adapter->net_stats.rx_length_errors = adapter->stats.rlec;
4455 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
4456 adapter->net_stats.rx_missed_errors = total_mpc;
4457 }
4458
4459 /**
4460 * ixgbe_watchdog - Timer Call-back
4461 * @data: pointer to adapter cast into an unsigned long
4462 **/
4463 static void ixgbe_watchdog(unsigned long data)
4464 {
4465 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4466 struct ixgbe_hw *hw = &adapter->hw;
4467 u64 eics = 0;
4468 int i;
4469
4470 /*
4471 * Do the watchdog outside of interrupt context due to the lovely
4472 * delays that some of the newer hardware requires
4473 */
4474
4475 if (test_bit(__IXGBE_DOWN, &adapter->state))
4476 goto watchdog_short_circuit;
4477
4478 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
4479 /*
4480 * for legacy and MSI interrupts don't set any bits
4481 * that are enabled for EIAM, because this operation
4482 * would set *both* EIMS and EICS for any bit in EIAM
4483 */
4484 IXGBE_WRITE_REG(hw, IXGBE_EICS,
4485 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
4486 goto watchdog_reschedule;
4487 }
4488
4489 /* get one bit for every active tx/rx interrupt vector */
4490 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
4491 struct ixgbe_q_vector *qv = adapter->q_vector[i];
4492 if (qv->rxr_count || qv->txr_count)
4493 eics |= ((u64)1 << i);
4494 }
4495
4496 /* Cause software interrupt to ensure rx rings are cleaned */
4497 ixgbe_irq_rearm_queues(adapter, eics);
4498
4499 watchdog_reschedule:
4500 /* Reset the timer */
4501 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
4502
4503 watchdog_short_circuit:
4504 schedule_work(&adapter->watchdog_task);
4505 }
4506
4507 /**
4508 * ixgbe_multispeed_fiber_task - worker thread to configure multispeed fiber
4509 * @work: pointer to work_struct containing our data
4510 **/
4511 static void ixgbe_multispeed_fiber_task(struct work_struct *work)
4512 {
4513 struct ixgbe_adapter *adapter = container_of(work,
4514 struct ixgbe_adapter,
4515 multispeed_fiber_task);
4516 struct ixgbe_hw *hw = &adapter->hw;
4517 u32 autoneg;
4518
4519 adapter->flags |= IXGBE_FLAG_IN_SFP_LINK_TASK;
4520 autoneg = hw->phy.autoneg_advertised;
4521 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
4522 hw->mac.ops.get_link_capabilities(hw, &autoneg,
4523 &hw->mac.autoneg);
4524 if (hw->mac.ops.setup_link_speed)
4525 hw->mac.ops.setup_link_speed(hw, autoneg, true, true);
4526 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
4527 adapter->flags &= ~IXGBE_FLAG_IN_SFP_LINK_TASK;
4528 }
4529
4530 /**
4531 * ixgbe_sfp_config_module_task - worker thread to configure a new SFP+ module
4532 * @work: pointer to work_struct containing our data
4533 **/
4534 static void ixgbe_sfp_config_module_task(struct work_struct *work)
4535 {
4536 struct ixgbe_adapter *adapter = container_of(work,
4537 struct ixgbe_adapter,
4538 sfp_config_module_task);
4539 struct ixgbe_hw *hw = &adapter->hw;
4540 u32 err;
4541
4542 adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
4543
4544 /* Time for electrical oscillations to settle down */
4545 msleep(100);
4546 err = hw->phy.ops.identify_sfp(hw);
4547
4548 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
4549 dev_err(&adapter->pdev->dev, "failed to initialize because "
4550 "an unsupported SFP+ module type was detected.\n"
4551 "Reload the driver after installing a supported "
4552 "module.\n");
4553 unregister_netdev(adapter->netdev);
4554 return;
4555 }
4556 hw->mac.ops.setup_sfp(hw);
4557
4558 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
4559 /* This will also work for DA Twinax connections */
4560 schedule_work(&adapter->multispeed_fiber_task);
4561 adapter->flags &= ~IXGBE_FLAG_IN_SFP_MOD_TASK;
4562 }
4563
4564 /**
4565 * ixgbe_fdir_reinit_task - worker thread to reinit FDIR filter table
4566 * @work: pointer to work_struct containing our data
4567 **/
4568 static void ixgbe_fdir_reinit_task(struct work_struct *work)
4569 {
4570 struct ixgbe_adapter *adapter = container_of(work,
4571 struct ixgbe_adapter,
4572 fdir_reinit_task);
4573 struct ixgbe_hw *hw = &adapter->hw;
4574 int i;
4575
4576 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
4577 for (i = 0; i < adapter->num_tx_queues; i++)
4578 set_bit(__IXGBE_FDIR_INIT_DONE,
4579 &(adapter->tx_ring[i].reinit_state));
4580 } else {
4581 DPRINTK(PROBE, ERR, "failed to finish FDIR re-initialization, "
4582 "ignored adding FDIR ATR filters \n");
4583 }
4584 /* Done FDIR Re-initialization, enable transmits */
4585 netif_tx_start_all_queues(adapter->netdev);
4586 }
4587
4588 /**
4589 * ixgbe_watchdog_task - worker thread to bring link up
4590 * @work: pointer to work_struct containing our data
4591 **/
4592 static void ixgbe_watchdog_task(struct work_struct *work)
4593 {
4594 struct ixgbe_adapter *adapter = container_of(work,
4595 struct ixgbe_adapter,
4596 watchdog_task);
4597 struct net_device *netdev = adapter->netdev;
4598 struct ixgbe_hw *hw = &adapter->hw;
4599 u32 link_speed = adapter->link_speed;
4600 bool link_up = adapter->link_up;
4601 int i;
4602 struct ixgbe_ring *tx_ring;
4603 int some_tx_pending = 0;
4604
4605 adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
4606
4607 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
4608 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
4609 if (link_up) {
4610 #ifdef CONFIG_DCB
4611 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4612 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
4613 hw->mac.ops.fc_enable(hw, i);
4614 } else {
4615 hw->mac.ops.fc_enable(hw, 0);
4616 }
4617 #else
4618 hw->mac.ops.fc_enable(hw, 0);
4619 #endif
4620 }
4621
4622 if (link_up ||
4623 time_after(jiffies, (adapter->link_check_timeout +
4624 IXGBE_TRY_LINK_TIMEOUT))) {
4625 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
4626 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
4627 }
4628 adapter->link_up = link_up;
4629 adapter->link_speed = link_speed;
4630 }
4631
4632 if (link_up) {
4633 if (!netif_carrier_ok(netdev)) {
4634 bool flow_rx, flow_tx;
4635
4636 if (hw->mac.type == ixgbe_mac_82599EB) {
4637 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
4638 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
4639 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
4640 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
4641 } else {
4642 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4643 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
4644 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
4645 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
4646 }
4647
4648 printk(KERN_INFO "ixgbe: %s NIC Link is Up %s, "
4649 "Flow Control: %s\n",
4650 netdev->name,
4651 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
4652 "10 Gbps" :
4653 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
4654 "1 Gbps" : "unknown speed")),
4655 ((flow_rx && flow_tx) ? "RX/TX" :
4656 (flow_rx ? "RX" :
4657 (flow_tx ? "TX" : "None"))));
4658
4659 netif_carrier_on(netdev);
4660 } else {
4661 /* Force detection of hung controller */
4662 adapter->detect_tx_hung = true;
4663 }
4664 } else {
4665 adapter->link_up = false;
4666 adapter->link_speed = 0;
4667 if (netif_carrier_ok(netdev)) {
4668 printk(KERN_INFO "ixgbe: %s NIC Link is Down\n",
4669 netdev->name);
4670 netif_carrier_off(netdev);
4671 }
4672 }
4673
4674 if (!netif_carrier_ok(netdev)) {
4675 for (i = 0; i < adapter->num_tx_queues; i++) {
4676 tx_ring = &adapter->tx_ring[i];
4677 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
4678 some_tx_pending = 1;
4679 break;
4680 }
4681 }
4682
4683 if (some_tx_pending) {
4684 /* We've lost link, so the controller stops DMA,
4685 * but we've got queued Tx work that's never going
4686 * to get done, so reset controller to flush Tx.
4687 * (Do the reset outside of interrupt context).
4688 */
4689 schedule_work(&adapter->reset_task);
4690 }
4691 }
4692
4693 ixgbe_update_stats(adapter);
4694 adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
4695 }
4696
4697 static int ixgbe_tso(struct ixgbe_adapter *adapter,
4698 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
4699 u32 tx_flags, u8 *hdr_len)
4700 {
4701 struct ixgbe_adv_tx_context_desc *context_desc;
4702 unsigned int i;
4703 int err;
4704 struct ixgbe_tx_buffer *tx_buffer_info;
4705 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
4706 u32 mss_l4len_idx, l4len;
4707
4708 if (skb_is_gso(skb)) {
4709 if (skb_header_cloned(skb)) {
4710 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
4711 if (err)
4712 return err;
4713 }
4714 l4len = tcp_hdrlen(skb);
4715 *hdr_len += l4len;
4716
4717 if (skb->protocol == htons(ETH_P_IP)) {
4718 struct iphdr *iph = ip_hdr(skb);
4719 iph->tot_len = 0;
4720 iph->check = 0;
4721 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
4722 iph->daddr, 0,
4723 IPPROTO_TCP,
4724 0);
4725 adapter->hw_tso_ctxt++;
4726 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
4727 ipv6_hdr(skb)->payload_len = 0;
4728 tcp_hdr(skb)->check =
4729 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
4730 &ipv6_hdr(skb)->daddr,
4731 0, IPPROTO_TCP, 0);
4732 adapter->hw_tso6_ctxt++;
4733 }
4734
4735 i = tx_ring->next_to_use;
4736
4737 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4738 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4739
4740 /* VLAN MACLEN IPLEN */
4741 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4742 vlan_macip_lens |=
4743 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4744 vlan_macip_lens |= ((skb_network_offset(skb)) <<
4745 IXGBE_ADVTXD_MACLEN_SHIFT);
4746 *hdr_len += skb_network_offset(skb);
4747 vlan_macip_lens |=
4748 (skb_transport_header(skb) - skb_network_header(skb));
4749 *hdr_len +=
4750 (skb_transport_header(skb) - skb_network_header(skb));
4751 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4752 context_desc->seqnum_seed = 0;
4753
4754 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
4755 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
4756 IXGBE_ADVTXD_DTYP_CTXT);
4757
4758 if (skb->protocol == htons(ETH_P_IP))
4759 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4760 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
4761 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4762
4763 /* MSS L4LEN IDX */
4764 mss_l4len_idx =
4765 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
4766 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
4767 /* use index 1 for TSO */
4768 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4769 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
4770
4771 tx_buffer_info->time_stamp = jiffies;
4772 tx_buffer_info->next_to_watch = i;
4773
4774 i++;
4775 if (i == tx_ring->count)
4776 i = 0;
4777 tx_ring->next_to_use = i;
4778
4779 return true;
4780 }
4781 return false;
4782 }
4783
4784 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
4785 struct ixgbe_ring *tx_ring,
4786 struct sk_buff *skb, u32 tx_flags)
4787 {
4788 struct ixgbe_adv_tx_context_desc *context_desc;
4789 unsigned int i;
4790 struct ixgbe_tx_buffer *tx_buffer_info;
4791 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
4792
4793 if (skb->ip_summed == CHECKSUM_PARTIAL ||
4794 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
4795 i = tx_ring->next_to_use;
4796 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4797 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4798
4799 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4800 vlan_macip_lens |=
4801 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4802 vlan_macip_lens |= (skb_network_offset(skb) <<
4803 IXGBE_ADVTXD_MACLEN_SHIFT);
4804 if (skb->ip_summed == CHECKSUM_PARTIAL)
4805 vlan_macip_lens |= (skb_transport_header(skb) -
4806 skb_network_header(skb));
4807
4808 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4809 context_desc->seqnum_seed = 0;
4810
4811 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
4812 IXGBE_ADVTXD_DTYP_CTXT);
4813
4814 if (skb->ip_summed == CHECKSUM_PARTIAL) {
4815 switch (skb->protocol) {
4816 case cpu_to_be16(ETH_P_IP):
4817 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4818 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
4819 type_tucmd_mlhl |=
4820 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4821 else if (ip_hdr(skb)->protocol == IPPROTO_SCTP)
4822 type_tucmd_mlhl |=
4823 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4824 break;
4825 case cpu_to_be16(ETH_P_IPV6):
4826 /* XXX what about other V6 headers?? */
4827 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
4828 type_tucmd_mlhl |=
4829 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4830 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_SCTP)
4831 type_tucmd_mlhl |=
4832 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4833 break;
4834 default:
4835 if (unlikely(net_ratelimit())) {
4836 DPRINTK(PROBE, WARNING,
4837 "partial checksum but proto=%x!\n",
4838 skb->protocol);
4839 }
4840 break;
4841 }
4842 }
4843
4844 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4845 /* use index zero for tx checksum offload */
4846 context_desc->mss_l4len_idx = 0;
4847
4848 tx_buffer_info->time_stamp = jiffies;
4849 tx_buffer_info->next_to_watch = i;
4850
4851 adapter->hw_csum_tx_good++;
4852 i++;
4853 if (i == tx_ring->count)
4854 i = 0;
4855 tx_ring->next_to_use = i;
4856
4857 return true;
4858 }
4859
4860 return false;
4861 }
4862
4863 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
4864 struct ixgbe_ring *tx_ring,
4865 struct sk_buff *skb, u32 tx_flags,
4866 unsigned int first)
4867 {
4868 struct ixgbe_tx_buffer *tx_buffer_info;
4869 unsigned int len;
4870 unsigned int total = skb->len;
4871 unsigned int offset = 0, size, count = 0, i;
4872 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
4873 unsigned int f;
4874 dma_addr_t *map;
4875
4876 i = tx_ring->next_to_use;
4877
4878 if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
4879 dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
4880 return 0;
4881 }
4882
4883 map = skb_shinfo(skb)->dma_maps;
4884
4885 if (tx_flags & IXGBE_TX_FLAGS_FCOE)
4886 /* excluding fcoe_crc_eof for FCoE */
4887 total -= sizeof(struct fcoe_crc_eof);
4888
4889 len = min(skb_headlen(skb), total);
4890 while (len) {
4891 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4892 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
4893
4894 tx_buffer_info->length = size;
4895 tx_buffer_info->dma = skb_shinfo(skb)->dma_head + offset;
4896 tx_buffer_info->time_stamp = jiffies;
4897 tx_buffer_info->next_to_watch = i;
4898
4899 len -= size;
4900 total -= size;
4901 offset += size;
4902 count++;
4903
4904 if (len) {
4905 i++;
4906 if (i == tx_ring->count)
4907 i = 0;
4908 }
4909 }
4910
4911 for (f = 0; f < nr_frags; f++) {
4912 struct skb_frag_struct *frag;
4913
4914 frag = &skb_shinfo(skb)->frags[f];
4915 len = min((unsigned int)frag->size, total);
4916 offset = 0;
4917
4918 while (len) {
4919 i++;
4920 if (i == tx_ring->count)
4921 i = 0;
4922
4923 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4924 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
4925
4926 tx_buffer_info->length = size;
4927 tx_buffer_info->dma = map[f] + offset;
4928 tx_buffer_info->time_stamp = jiffies;
4929 tx_buffer_info->next_to_watch = i;
4930
4931 len -= size;
4932 total -= size;
4933 offset += size;
4934 count++;
4935 }
4936 if (total == 0)
4937 break;
4938 }
4939
4940 tx_ring->tx_buffer_info[i].skb = skb;
4941 tx_ring->tx_buffer_info[first].next_to_watch = i;
4942
4943 return count;
4944 }
4945
4946 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
4947 struct ixgbe_ring *tx_ring,
4948 int tx_flags, int count, u32 paylen, u8 hdr_len)
4949 {
4950 union ixgbe_adv_tx_desc *tx_desc = NULL;
4951 struct ixgbe_tx_buffer *tx_buffer_info;
4952 u32 olinfo_status = 0, cmd_type_len = 0;
4953 unsigned int i;
4954 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
4955
4956 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
4957
4958 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
4959
4960 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4961 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
4962
4963 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
4964 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
4965
4966 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
4967 IXGBE_ADVTXD_POPTS_SHIFT;
4968
4969 /* use index 1 context for tso */
4970 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4971 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
4972 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
4973 IXGBE_ADVTXD_POPTS_SHIFT;
4974
4975 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
4976 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
4977 IXGBE_ADVTXD_POPTS_SHIFT;
4978
4979 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
4980 olinfo_status |= IXGBE_ADVTXD_CC;
4981 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4982 if (tx_flags & IXGBE_TX_FLAGS_FSO)
4983 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
4984 }
4985
4986 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
4987
4988 i = tx_ring->next_to_use;
4989 while (count--) {
4990 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4991 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
4992 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
4993 tx_desc->read.cmd_type_len =
4994 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
4995 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
4996 i++;
4997 if (i == tx_ring->count)
4998 i = 0;
4999 }
5000
5001 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
5002
5003 /*
5004 * Force memory writes to complete before letting h/w
5005 * know there are new descriptors to fetch. (Only
5006 * applicable for weak-ordered memory model archs,
5007 * such as IA-64).
5008 */
5009 wmb();
5010
5011 tx_ring->next_to_use = i;
5012 writel(i, adapter->hw.hw_addr + tx_ring->tail);
5013 }
5014
5015 static void ixgbe_atr(struct ixgbe_adapter *adapter, struct sk_buff *skb,
5016 int queue, u32 tx_flags)
5017 {
5018 /* Right now, we support IPv4 only */
5019 struct ixgbe_atr_input atr_input;
5020 struct tcphdr *th;
5021 struct udphdr *uh;
5022 struct iphdr *iph = ip_hdr(skb);
5023 struct ethhdr *eth = (struct ethhdr *)skb->data;
5024 u16 vlan_id, src_port, dst_port, flex_bytes;
5025 u32 src_ipv4_addr, dst_ipv4_addr;
5026 u8 l4type = 0;
5027
5028 /* check if we're UDP or TCP */
5029 if (iph->protocol == IPPROTO_TCP) {
5030 th = tcp_hdr(skb);
5031 src_port = th->source;
5032 dst_port = th->dest;
5033 l4type |= IXGBE_ATR_L4TYPE_TCP;
5034 /* l4type IPv4 type is 0, no need to assign */
5035 } else if(iph->protocol == IPPROTO_UDP) {
5036 uh = udp_hdr(skb);
5037 src_port = uh->source;
5038 dst_port = uh->dest;
5039 l4type |= IXGBE_ATR_L4TYPE_UDP;
5040 /* l4type IPv4 type is 0, no need to assign */
5041 } else {
5042 /* Unsupported L4 header, just bail here */
5043 return;
5044 }
5045
5046 memset(&atr_input, 0, sizeof(struct ixgbe_atr_input));
5047
5048 vlan_id = (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK) >>
5049 IXGBE_TX_FLAGS_VLAN_SHIFT;
5050 src_ipv4_addr = iph->saddr;
5051 dst_ipv4_addr = iph->daddr;
5052 flex_bytes = eth->h_proto;
5053
5054 ixgbe_atr_set_vlan_id_82599(&atr_input, vlan_id);
5055 ixgbe_atr_set_src_port_82599(&atr_input, dst_port);
5056 ixgbe_atr_set_dst_port_82599(&atr_input, src_port);
5057 ixgbe_atr_set_flex_byte_82599(&atr_input, flex_bytes);
5058 ixgbe_atr_set_l4type_82599(&atr_input, l4type);
5059 /* src and dst are inverted, think how the receiver sees them */
5060 ixgbe_atr_set_src_ipv4_82599(&atr_input, dst_ipv4_addr);
5061 ixgbe_atr_set_dst_ipv4_82599(&atr_input, src_ipv4_addr);
5062
5063 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
5064 ixgbe_fdir_add_signature_filter_82599(&adapter->hw, &atr_input, queue);
5065 }
5066
5067 static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
5068 struct ixgbe_ring *tx_ring, int size)
5069 {
5070 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5071
5072 netif_stop_subqueue(netdev, tx_ring->queue_index);
5073 /* Herbert's original patch had:
5074 * smp_mb__after_netif_stop_queue();
5075 * but since that doesn't exist yet, just open code it. */
5076 smp_mb();
5077
5078 /* We need to check again in a case another CPU has just
5079 * made room available. */
5080 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
5081 return -EBUSY;
5082
5083 /* A reprieve! - use start_queue because it doesn't call schedule */
5084 netif_start_subqueue(netdev, tx_ring->queue_index);
5085 ++adapter->restart_queue;
5086 return 0;
5087 }
5088
5089 static int ixgbe_maybe_stop_tx(struct net_device *netdev,
5090 struct ixgbe_ring *tx_ring, int size)
5091 {
5092 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
5093 return 0;
5094 return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
5095 }
5096
5097 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
5098 {
5099 struct ixgbe_adapter *adapter = netdev_priv(dev);
5100
5101 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
5102 return smp_processor_id();
5103
5104 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
5105 return (skb->vlan_tci & IXGBE_TX_FLAGS_VLAN_PRIO_MASK) >> 13;
5106
5107 return skb_tx_hash(dev, skb);
5108 }
5109
5110 static int ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
5111 {
5112 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5113 struct ixgbe_ring *tx_ring;
5114 unsigned int first;
5115 unsigned int tx_flags = 0;
5116 u8 hdr_len = 0;
5117 int r_idx = 0, tso;
5118 int count = 0;
5119 unsigned int f;
5120
5121 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
5122 tx_flags |= vlan_tx_tag_get(skb);
5123 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5124 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
5125 tx_flags |= (skb->queue_mapping << 13);
5126 }
5127 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
5128 tx_flags |= IXGBE_TX_FLAGS_VLAN;
5129 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5130 if (skb->priority != TC_PRIO_CONTROL) {
5131 tx_flags |= (skb->queue_mapping << 13);
5132 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
5133 tx_flags |= IXGBE_TX_FLAGS_VLAN;
5134 } else {
5135 skb->queue_mapping =
5136 adapter->ring_feature[RING_F_DCB].indices-1;
5137 }
5138 }
5139
5140 r_idx = skb->queue_mapping;
5141 tx_ring = &adapter->tx_ring[r_idx];
5142
5143 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
5144 (skb->protocol == htons(ETH_P_FCOE)))
5145 tx_flags |= IXGBE_TX_FLAGS_FCOE;
5146
5147 /* four things can cause us to need a context descriptor */
5148 if (skb_is_gso(skb) ||
5149 (skb->ip_summed == CHECKSUM_PARTIAL) ||
5150 (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
5151 (tx_flags & IXGBE_TX_FLAGS_FCOE))
5152 count++;
5153
5154 count += TXD_USE_COUNT(skb_headlen(skb));
5155 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
5156 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
5157
5158 if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
5159 adapter->tx_busy++;
5160 return NETDEV_TX_BUSY;
5161 }
5162
5163 first = tx_ring->next_to_use;
5164 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
5165 #ifdef IXGBE_FCOE
5166 /* setup tx offload for FCoE */
5167 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
5168 if (tso < 0) {
5169 dev_kfree_skb_any(skb);
5170 return NETDEV_TX_OK;
5171 }
5172 if (tso)
5173 tx_flags |= IXGBE_TX_FLAGS_FSO;
5174 #endif /* IXGBE_FCOE */
5175 } else {
5176 if (skb->protocol == htons(ETH_P_IP))
5177 tx_flags |= IXGBE_TX_FLAGS_IPV4;
5178 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
5179 if (tso < 0) {
5180 dev_kfree_skb_any(skb);
5181 return NETDEV_TX_OK;
5182 }
5183
5184 if (tso)
5185 tx_flags |= IXGBE_TX_FLAGS_TSO;
5186 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
5187 (skb->ip_summed == CHECKSUM_PARTIAL))
5188 tx_flags |= IXGBE_TX_FLAGS_CSUM;
5189 }
5190
5191 count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first);
5192 if (count) {
5193 /* add the ATR filter if ATR is on */
5194 if (tx_ring->atr_sample_rate) {
5195 ++tx_ring->atr_count;
5196 if ((tx_ring->atr_count >= tx_ring->atr_sample_rate) &&
5197 test_bit(__IXGBE_FDIR_INIT_DONE,
5198 &tx_ring->reinit_state)) {
5199 ixgbe_atr(adapter, skb, tx_ring->queue_index,
5200 tx_flags);
5201 tx_ring->atr_count = 0;
5202 }
5203 }
5204 ixgbe_tx_queue(adapter, tx_ring, tx_flags, count, skb->len,
5205 hdr_len);
5206 ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
5207
5208 } else {
5209 dev_kfree_skb_any(skb);
5210 tx_ring->tx_buffer_info[first].time_stamp = 0;
5211 tx_ring->next_to_use = first;
5212 }
5213
5214 return NETDEV_TX_OK;
5215 }
5216
5217 /**
5218 * ixgbe_get_stats - Get System Network Statistics
5219 * @netdev: network interface device structure
5220 *
5221 * Returns the address of the device statistics structure.
5222 * The statistics are actually updated from the timer callback.
5223 **/
5224 static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
5225 {
5226 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5227
5228 /* only return the current stats */
5229 return &adapter->net_stats;
5230 }
5231
5232 /**
5233 * ixgbe_set_mac - Change the Ethernet Address of the NIC
5234 * @netdev: network interface device structure
5235 * @p: pointer to an address structure
5236 *
5237 * Returns 0 on success, negative on failure
5238 **/
5239 static int ixgbe_set_mac(struct net_device *netdev, void *p)
5240 {
5241 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5242 struct ixgbe_hw *hw = &adapter->hw;
5243 struct sockaddr *addr = p;
5244
5245 if (!is_valid_ether_addr(addr->sa_data))
5246 return -EADDRNOTAVAIL;
5247
5248 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
5249 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
5250
5251 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
5252
5253 return 0;
5254 }
5255
5256 static int
5257 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
5258 {
5259 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5260 struct ixgbe_hw *hw = &adapter->hw;
5261 u16 value;
5262 int rc;
5263
5264 if (prtad != hw->phy.mdio.prtad)
5265 return -EINVAL;
5266 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
5267 if (!rc)
5268 rc = value;
5269 return rc;
5270 }
5271
5272 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
5273 u16 addr, u16 value)
5274 {
5275 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5276 struct ixgbe_hw *hw = &adapter->hw;
5277
5278 if (prtad != hw->phy.mdio.prtad)
5279 return -EINVAL;
5280 return hw->phy.ops.write_reg(hw, addr, devad, value);
5281 }
5282
5283 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
5284 {
5285 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5286
5287 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
5288 }
5289
5290 /**
5291 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
5292 * netdev->dev_addrs
5293 * @netdev: network interface device structure
5294 *
5295 * Returns non-zero on failure
5296 **/
5297 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
5298 {
5299 int err = 0;
5300 struct ixgbe_adapter *adapter = netdev_priv(dev);
5301 struct ixgbe_mac_info *mac = &adapter->hw.mac;
5302
5303 if (is_valid_ether_addr(mac->san_addr)) {
5304 rtnl_lock();
5305 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
5306 rtnl_unlock();
5307 }
5308 return err;
5309 }
5310
5311 /**
5312 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
5313 * netdev->dev_addrs
5314 * @netdev: network interface device structure
5315 *
5316 * Returns non-zero on failure
5317 **/
5318 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
5319 {
5320 int err = 0;
5321 struct ixgbe_adapter *adapter = netdev_priv(dev);
5322 struct ixgbe_mac_info *mac = &adapter->hw.mac;
5323
5324 if (is_valid_ether_addr(mac->san_addr)) {
5325 rtnl_lock();
5326 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
5327 rtnl_unlock();
5328 }
5329 return err;
5330 }
5331
5332 #ifdef CONFIG_NET_POLL_CONTROLLER
5333 /*
5334 * Polling 'interrupt' - used by things like netconsole to send skbs
5335 * without having to re-enable interrupts. It's not called while
5336 * the interrupt routine is executing.
5337 */
5338 static void ixgbe_netpoll(struct net_device *netdev)
5339 {
5340 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5341 int i;
5342
5343 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
5344 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
5345 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
5346 for (i = 0; i < num_q_vectors; i++) {
5347 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
5348 ixgbe_msix_clean_many(0, q_vector);
5349 }
5350 } else {
5351 ixgbe_intr(adapter->pdev->irq, netdev);
5352 }
5353 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
5354 }
5355 #endif
5356
5357 static const struct net_device_ops ixgbe_netdev_ops = {
5358 .ndo_open = ixgbe_open,
5359 .ndo_stop = ixgbe_close,
5360 .ndo_start_xmit = ixgbe_xmit_frame,
5361 .ndo_select_queue = ixgbe_select_queue,
5362 .ndo_get_stats = ixgbe_get_stats,
5363 .ndo_set_rx_mode = ixgbe_set_rx_mode,
5364 .ndo_set_multicast_list = ixgbe_set_rx_mode,
5365 .ndo_validate_addr = eth_validate_addr,
5366 .ndo_set_mac_address = ixgbe_set_mac,
5367 .ndo_change_mtu = ixgbe_change_mtu,
5368 .ndo_tx_timeout = ixgbe_tx_timeout,
5369 .ndo_vlan_rx_register = ixgbe_vlan_rx_register,
5370 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
5371 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
5372 .ndo_do_ioctl = ixgbe_ioctl,
5373 #ifdef CONFIG_NET_POLL_CONTROLLER
5374 .ndo_poll_controller = ixgbe_netpoll,
5375 #endif
5376 #ifdef IXGBE_FCOE
5377 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
5378 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
5379 #endif /* IXGBE_FCOE */
5380 };
5381
5382 /**
5383 * ixgbe_probe - Device Initialization Routine
5384 * @pdev: PCI device information struct
5385 * @ent: entry in ixgbe_pci_tbl
5386 *
5387 * Returns 0 on success, negative on failure
5388 *
5389 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
5390 * The OS initialization, configuring of the adapter private structure,
5391 * and a hardware reset occur.
5392 **/
5393 static int __devinit ixgbe_probe(struct pci_dev *pdev,
5394 const struct pci_device_id *ent)
5395 {
5396 struct net_device *netdev;
5397 struct ixgbe_adapter *adapter = NULL;
5398 struct ixgbe_hw *hw;
5399 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
5400 static int cards_found;
5401 int i, err, pci_using_dac;
5402 #ifdef IXGBE_FCOE
5403 u16 device_caps;
5404 #endif
5405 u32 part_num, eec;
5406
5407 err = pci_enable_device_mem(pdev);
5408 if (err)
5409 return err;
5410
5411 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) &&
5412 !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
5413 pci_using_dac = 1;
5414 } else {
5415 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5416 if (err) {
5417 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5418 if (err) {
5419 dev_err(&pdev->dev, "No usable DMA "
5420 "configuration, aborting\n");
5421 goto err_dma;
5422 }
5423 }
5424 pci_using_dac = 0;
5425 }
5426
5427 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
5428 IORESOURCE_MEM), ixgbe_driver_name);
5429 if (err) {
5430 dev_err(&pdev->dev,
5431 "pci_request_selected_regions failed 0x%x\n", err);
5432 goto err_pci_reg;
5433 }
5434
5435 err = pci_enable_pcie_error_reporting(pdev);
5436 if (err) {
5437 dev_err(&pdev->dev, "pci_enable_pcie_error_reporting failed "
5438 "0x%x\n", err);
5439 /* non-fatal, continue */
5440 }
5441
5442 pci_set_master(pdev);
5443 pci_save_state(pdev);
5444
5445 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES);
5446 if (!netdev) {
5447 err = -ENOMEM;
5448 goto err_alloc_etherdev;
5449 }
5450
5451 SET_NETDEV_DEV(netdev, &pdev->dev);
5452
5453 pci_set_drvdata(pdev, netdev);
5454 adapter = netdev_priv(netdev);
5455
5456 adapter->netdev = netdev;
5457 adapter->pdev = pdev;
5458 hw = &adapter->hw;
5459 hw->back = adapter;
5460 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
5461
5462 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
5463 pci_resource_len(pdev, 0));
5464 if (!hw->hw_addr) {
5465 err = -EIO;
5466 goto err_ioremap;
5467 }
5468
5469 for (i = 1; i <= 5; i++) {
5470 if (pci_resource_len(pdev, i) == 0)
5471 continue;
5472 }
5473
5474 netdev->netdev_ops = &ixgbe_netdev_ops;
5475 ixgbe_set_ethtool_ops(netdev);
5476 netdev->watchdog_timeo = 5 * HZ;
5477 strcpy(netdev->name, pci_name(pdev));
5478
5479 adapter->bd_number = cards_found;
5480
5481 /* Setup hw api */
5482 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
5483 hw->mac.type = ii->mac;
5484
5485 /* EEPROM */
5486 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
5487 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
5488 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
5489 if (!(eec & (1 << 8)))
5490 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
5491
5492 /* PHY */
5493 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
5494 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
5495 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
5496 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
5497 hw->phy.mdio.mmds = 0;
5498 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
5499 hw->phy.mdio.dev = netdev;
5500 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
5501 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
5502
5503 /* set up this timer and work struct before calling get_invariants
5504 * which might start the timer
5505 */
5506 init_timer(&adapter->sfp_timer);
5507 adapter->sfp_timer.function = &ixgbe_sfp_timer;
5508 adapter->sfp_timer.data = (unsigned long) adapter;
5509
5510 INIT_WORK(&adapter->sfp_task, ixgbe_sfp_task);
5511
5512 /* multispeed fiber has its own tasklet, called from GPI SDP1 context */
5513 INIT_WORK(&adapter->multispeed_fiber_task, ixgbe_multispeed_fiber_task);
5514
5515 /* a new SFP+ module arrival, called from GPI SDP2 context */
5516 INIT_WORK(&adapter->sfp_config_module_task,
5517 ixgbe_sfp_config_module_task);
5518
5519 ii->get_invariants(hw);
5520
5521 /* setup the private structure */
5522 err = ixgbe_sw_init(adapter);
5523 if (err)
5524 goto err_sw_init;
5525
5526 /*
5527 * If there is a fan on this device and it has failed log the
5528 * failure.
5529 */
5530 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
5531 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
5532 if (esdp & IXGBE_ESDP_SDP1)
5533 DPRINTK(PROBE, CRIT,
5534 "Fan has stopped, replace the adapter\n");
5535 }
5536
5537 /* reset_hw fills in the perm_addr as well */
5538 err = hw->mac.ops.reset_hw(hw);
5539 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
5540 hw->mac.type == ixgbe_mac_82598EB) {
5541 /*
5542 * Start a kernel thread to watch for a module to arrive.
5543 * Only do this for 82598, since 82599 will generate
5544 * interrupts on module arrival.
5545 */
5546 set_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5547 mod_timer(&adapter->sfp_timer,
5548 round_jiffies(jiffies + (2 * HZ)));
5549 err = 0;
5550 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5551 dev_err(&adapter->pdev->dev, "failed to initialize because "
5552 "an unsupported SFP+ module type was detected.\n"
5553 "Reload the driver after installing a supported "
5554 "module.\n");
5555 goto err_sw_init;
5556 } else if (err) {
5557 dev_err(&adapter->pdev->dev, "HW Init failed: %d\n", err);
5558 goto err_sw_init;
5559 }
5560
5561 netdev->features = NETIF_F_SG |
5562 NETIF_F_IP_CSUM |
5563 NETIF_F_HW_VLAN_TX |
5564 NETIF_F_HW_VLAN_RX |
5565 NETIF_F_HW_VLAN_FILTER;
5566
5567 netdev->features |= NETIF_F_IPV6_CSUM;
5568 netdev->features |= NETIF_F_TSO;
5569 netdev->features |= NETIF_F_TSO6;
5570 netdev->features |= NETIF_F_GRO;
5571
5572 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
5573 netdev->features |= NETIF_F_SCTP_CSUM;
5574
5575 netdev->vlan_features |= NETIF_F_TSO;
5576 netdev->vlan_features |= NETIF_F_TSO6;
5577 netdev->vlan_features |= NETIF_F_IP_CSUM;
5578 netdev->vlan_features |= NETIF_F_SG;
5579
5580 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
5581 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
5582
5583 #ifdef CONFIG_IXGBE_DCB
5584 netdev->dcbnl_ops = &dcbnl_ops;
5585 #endif
5586
5587 #ifdef IXGBE_FCOE
5588 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
5589 if (hw->mac.ops.get_device_caps) {
5590 hw->mac.ops.get_device_caps(hw, &device_caps);
5591 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
5592 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
5593 }
5594 }
5595 #endif /* IXGBE_FCOE */
5596 if (pci_using_dac)
5597 netdev->features |= NETIF_F_HIGHDMA;
5598
5599 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
5600 netdev->features |= NETIF_F_LRO;
5601
5602 /* make sure the EEPROM is good */
5603 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
5604 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
5605 err = -EIO;
5606 goto err_eeprom;
5607 }
5608
5609 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
5610 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
5611
5612 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
5613 dev_err(&pdev->dev, "invalid MAC address\n");
5614 err = -EIO;
5615 goto err_eeprom;
5616 }
5617
5618 init_timer(&adapter->watchdog_timer);
5619 adapter->watchdog_timer.function = &ixgbe_watchdog;
5620 adapter->watchdog_timer.data = (unsigned long)adapter;
5621
5622 INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
5623 INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
5624
5625 err = ixgbe_init_interrupt_scheme(adapter);
5626 if (err)
5627 goto err_sw_init;
5628
5629 switch (pdev->device) {
5630 case IXGBE_DEV_ID_82599_KX4:
5631 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
5632 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
5633 /* Enable ACPI wakeup in GRC */
5634 IXGBE_WRITE_REG(hw, IXGBE_GRC,
5635 (IXGBE_READ_REG(hw, IXGBE_GRC) & ~IXGBE_GRC_APME));
5636 break;
5637 default:
5638 adapter->wol = 0;
5639 break;
5640 }
5641 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
5642
5643 /* pick up the PCI bus settings for reporting later */
5644 hw->mac.ops.get_bus_info(hw);
5645
5646 /* print bus type/speed/width info */
5647 dev_info(&pdev->dev, "(PCI Express:%s:%s) %pM\n",
5648 ((hw->bus.speed == ixgbe_bus_speed_5000) ? "5.0Gb/s":
5649 (hw->bus.speed == ixgbe_bus_speed_2500) ? "2.5Gb/s":"Unknown"),
5650 ((hw->bus.width == ixgbe_bus_width_pcie_x8) ? "Width x8" :
5651 (hw->bus.width == ixgbe_bus_width_pcie_x4) ? "Width x4" :
5652 (hw->bus.width == ixgbe_bus_width_pcie_x1) ? "Width x1" :
5653 "Unknown"),
5654 netdev->dev_addr);
5655 ixgbe_read_pba_num_generic(hw, &part_num);
5656 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
5657 dev_info(&pdev->dev, "MAC: %d, PHY: %d, SFP+: %d, PBA No: %06x-%03x\n",
5658 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
5659 (part_num >> 8), (part_num & 0xff));
5660 else
5661 dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
5662 hw->mac.type, hw->phy.type,
5663 (part_num >> 8), (part_num & 0xff));
5664
5665 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
5666 dev_warn(&pdev->dev, "PCI-Express bandwidth available for "
5667 "this card is not sufficient for optimal "
5668 "performance.\n");
5669 dev_warn(&pdev->dev, "For optimal performance a x8 "
5670 "PCI-Express slot is required.\n");
5671 }
5672
5673 /* save off EEPROM version number */
5674 hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
5675
5676 /* reset the hardware with the new settings */
5677 err = hw->mac.ops.start_hw(hw);
5678
5679 if (err == IXGBE_ERR_EEPROM_VERSION) {
5680 /* We are running on a pre-production device, log a warning */
5681 dev_warn(&pdev->dev, "This device is a pre-production "
5682 "adapter/LOM. Please be aware there may be issues "
5683 "associated with your hardware. If you are "
5684 "experiencing problems please contact your Intel or "
5685 "hardware representative who provided you with this "
5686 "hardware.\n");
5687 }
5688 strcpy(netdev->name, "eth%d");
5689 err = register_netdev(netdev);
5690 if (err)
5691 goto err_register;
5692
5693 /* carrier off reporting is important to ethtool even BEFORE open */
5694 netif_carrier_off(netdev);
5695
5696 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
5697 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
5698 INIT_WORK(&adapter->fdir_reinit_task, ixgbe_fdir_reinit_task);
5699
5700 #ifdef CONFIG_IXGBE_DCA
5701 if (dca_add_requester(&pdev->dev) == 0) {
5702 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
5703 ixgbe_setup_dca(adapter);
5704 }
5705 #endif
5706 /* add san mac addr to netdev */
5707 ixgbe_add_sanmac_netdev(netdev);
5708
5709 dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
5710 cards_found++;
5711 return 0;
5712
5713 err_register:
5714 ixgbe_release_hw_control(adapter);
5715 ixgbe_clear_interrupt_scheme(adapter);
5716 err_sw_init:
5717 err_eeprom:
5718 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5719 del_timer_sync(&adapter->sfp_timer);
5720 cancel_work_sync(&adapter->sfp_task);
5721 cancel_work_sync(&adapter->multispeed_fiber_task);
5722 cancel_work_sync(&adapter->sfp_config_module_task);
5723 iounmap(hw->hw_addr);
5724 err_ioremap:
5725 free_netdev(netdev);
5726 err_alloc_etherdev:
5727 pci_release_selected_regions(pdev, pci_select_bars(pdev,
5728 IORESOURCE_MEM));
5729 err_pci_reg:
5730 err_dma:
5731 pci_disable_device(pdev);
5732 return err;
5733 }
5734
5735 /**
5736 * ixgbe_remove - Device Removal Routine
5737 * @pdev: PCI device information struct
5738 *
5739 * ixgbe_remove is called by the PCI subsystem to alert the driver
5740 * that it should release a PCI device. The could be caused by a
5741 * Hot-Plug event, or because the driver is going to be removed from
5742 * memory.
5743 **/
5744 static void __devexit ixgbe_remove(struct pci_dev *pdev)
5745 {
5746 struct net_device *netdev = pci_get_drvdata(pdev);
5747 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5748 int err;
5749
5750 set_bit(__IXGBE_DOWN, &adapter->state);
5751 /* clear the module not found bit to make sure the worker won't
5752 * reschedule
5753 */
5754 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5755 del_timer_sync(&adapter->watchdog_timer);
5756
5757 del_timer_sync(&adapter->sfp_timer);
5758 cancel_work_sync(&adapter->watchdog_task);
5759 cancel_work_sync(&adapter->sfp_task);
5760 cancel_work_sync(&adapter->multispeed_fiber_task);
5761 cancel_work_sync(&adapter->sfp_config_module_task);
5762 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
5763 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
5764 cancel_work_sync(&adapter->fdir_reinit_task);
5765 flush_scheduled_work();
5766
5767 #ifdef CONFIG_IXGBE_DCA
5768 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
5769 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
5770 dca_remove_requester(&pdev->dev);
5771 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
5772 }
5773
5774 #endif
5775 #ifdef IXGBE_FCOE
5776 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
5777 ixgbe_cleanup_fcoe(adapter);
5778
5779 #endif /* IXGBE_FCOE */
5780
5781 /* remove the added san mac */
5782 ixgbe_del_sanmac_netdev(netdev);
5783
5784 if (netdev->reg_state == NETREG_REGISTERED)
5785 unregister_netdev(netdev);
5786
5787 ixgbe_clear_interrupt_scheme(adapter);
5788
5789 ixgbe_release_hw_control(adapter);
5790
5791 iounmap(adapter->hw.hw_addr);
5792 pci_release_selected_regions(pdev, pci_select_bars(pdev,
5793 IORESOURCE_MEM));
5794
5795 DPRINTK(PROBE, INFO, "complete\n");
5796
5797 free_netdev(netdev);
5798
5799 err = pci_disable_pcie_error_reporting(pdev);
5800 if (err)
5801 dev_err(&pdev->dev,
5802 "pci_disable_pcie_error_reporting failed 0x%x\n", err);
5803
5804 pci_disable_device(pdev);
5805 }
5806
5807 /**
5808 * ixgbe_io_error_detected - called when PCI error is detected
5809 * @pdev: Pointer to PCI device
5810 * @state: The current pci connection state
5811 *
5812 * This function is called after a PCI bus error affecting
5813 * this device has been detected.
5814 */
5815 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
5816 pci_channel_state_t state)
5817 {
5818 struct net_device *netdev = pci_get_drvdata(pdev);
5819 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5820
5821 netif_device_detach(netdev);
5822
5823 if (state == pci_channel_io_perm_failure)
5824 return PCI_ERS_RESULT_DISCONNECT;
5825
5826 if (netif_running(netdev))
5827 ixgbe_down(adapter);
5828 pci_disable_device(pdev);
5829
5830 /* Request a slot reset. */
5831 return PCI_ERS_RESULT_NEED_RESET;
5832 }
5833
5834 /**
5835 * ixgbe_io_slot_reset - called after the pci bus has been reset.
5836 * @pdev: Pointer to PCI device
5837 *
5838 * Restart the card from scratch, as if from a cold-boot.
5839 */
5840 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
5841 {
5842 struct net_device *netdev = pci_get_drvdata(pdev);
5843 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5844 pci_ers_result_t result;
5845 int err;
5846
5847 if (pci_enable_device_mem(pdev)) {
5848 DPRINTK(PROBE, ERR,
5849 "Cannot re-enable PCI device after reset.\n");
5850 result = PCI_ERS_RESULT_DISCONNECT;
5851 } else {
5852 pci_set_master(pdev);
5853 pci_restore_state(pdev);
5854
5855 pci_wake_from_d3(pdev, false);
5856
5857 ixgbe_reset(adapter);
5858 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5859 result = PCI_ERS_RESULT_RECOVERED;
5860 }
5861
5862 err = pci_cleanup_aer_uncorrect_error_status(pdev);
5863 if (err) {
5864 dev_err(&pdev->dev,
5865 "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n", err);
5866 /* non-fatal, continue */
5867 }
5868
5869 return result;
5870 }
5871
5872 /**
5873 * ixgbe_io_resume - called when traffic can start flowing again.
5874 * @pdev: Pointer to PCI device
5875 *
5876 * This callback is called when the error recovery driver tells us that
5877 * its OK to resume normal operation.
5878 */
5879 static void ixgbe_io_resume(struct pci_dev *pdev)
5880 {
5881 struct net_device *netdev = pci_get_drvdata(pdev);
5882 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5883
5884 if (netif_running(netdev)) {
5885 if (ixgbe_up(adapter)) {
5886 DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
5887 return;
5888 }
5889 }
5890
5891 netif_device_attach(netdev);
5892 }
5893
5894 static struct pci_error_handlers ixgbe_err_handler = {
5895 .error_detected = ixgbe_io_error_detected,
5896 .slot_reset = ixgbe_io_slot_reset,
5897 .resume = ixgbe_io_resume,
5898 };
5899
5900 static struct pci_driver ixgbe_driver = {
5901 .name = ixgbe_driver_name,
5902 .id_table = ixgbe_pci_tbl,
5903 .probe = ixgbe_probe,
5904 .remove = __devexit_p(ixgbe_remove),
5905 #ifdef CONFIG_PM
5906 .suspend = ixgbe_suspend,
5907 .resume = ixgbe_resume,
5908 #endif
5909 .shutdown = ixgbe_shutdown,
5910 .err_handler = &ixgbe_err_handler
5911 };
5912
5913 /**
5914 * ixgbe_init_module - Driver Registration Routine
5915 *
5916 * ixgbe_init_module is the first routine called when the driver is
5917 * loaded. All it does is register with the PCI subsystem.
5918 **/
5919 static int __init ixgbe_init_module(void)
5920 {
5921 int ret;
5922 printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
5923 ixgbe_driver_string, ixgbe_driver_version);
5924
5925 printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
5926
5927 #ifdef CONFIG_IXGBE_DCA
5928 dca_register_notify(&dca_notifier);
5929 #endif
5930
5931 ret = pci_register_driver(&ixgbe_driver);
5932 return ret;
5933 }
5934
5935 module_init(ixgbe_init_module);
5936
5937 /**
5938 * ixgbe_exit_module - Driver Exit Cleanup Routine
5939 *
5940 * ixgbe_exit_module is called just before the driver is removed
5941 * from memory.
5942 **/
5943 static void __exit ixgbe_exit_module(void)
5944 {
5945 #ifdef CONFIG_IXGBE_DCA
5946 dca_unregister_notify(&dca_notifier);
5947 #endif
5948 pci_unregister_driver(&ixgbe_driver);
5949 }
5950
5951 #ifdef CONFIG_IXGBE_DCA
5952 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
5953 void *p)
5954 {
5955 int ret_val;
5956
5957 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
5958 __ixgbe_notify_dca);
5959
5960 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
5961 }
5962
5963 #endif /* CONFIG_IXGBE_DCA */
5964 #ifdef DEBUG
5965 /**
5966 * ixgbe_get_hw_dev_name - return device name string
5967 * used by hardware layer to print debugging information
5968 **/
5969 char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw)
5970 {
5971 struct ixgbe_adapter *adapter = hw->back;
5972 return adapter->netdev->name;
5973 }
5974
5975 #endif
5976 module_exit(ixgbe_exit_module);
5977
5978 /* ixgbe_main.c */
Linux with added FPC-III support