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ixgbe patch to provide NIC's tx/rx counters via ethtool
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / ixgbe / ixgbe_main.c
blob9609673992094982c4369aa7c6358d3172520098
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 "2.0.44-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 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4),
101 board_82599 },
102
103 /* required last entry */
104 {0, }
105 };
106 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
107
108 #ifdef CONFIG_IXGBE_DCA
109 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
110 void *p);
111 static struct notifier_block dca_notifier = {
112 .notifier_call = ixgbe_notify_dca,
113 .next = NULL,
114 .priority = 0
115 };
116 #endif
117
118 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
119 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
120 MODULE_LICENSE("GPL");
121 MODULE_VERSION(DRV_VERSION);
122
123 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
124
125 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
126 {
127 u32 ctrl_ext;
128
129 /* Let firmware take over control of h/w */
130 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
131 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
132 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
133 }
134
135 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
136 {
137 u32 ctrl_ext;
138
139 /* Let firmware know the driver has taken over */
140 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
141 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
142 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
143 }
144
145 /*
146 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
147 * @adapter: pointer to adapter struct
148 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
149 * @queue: queue to map the corresponding interrupt to
150 * @msix_vector: the vector to map to the corresponding queue
151 *
152 */
153 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
154 u8 queue, u8 msix_vector)
155 {
156 u32 ivar, index;
157 struct ixgbe_hw *hw = &adapter->hw;
158 switch (hw->mac.type) {
159 case ixgbe_mac_82598EB:
160 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
161 if (direction == -1)
162 direction = 0;
163 index = (((direction * 64) + queue) >> 2) & 0x1F;
164 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
165 ivar &= ~(0xFF << (8 * (queue & 0x3)));
166 ivar |= (msix_vector << (8 * (queue & 0x3)));
167 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
168 break;
169 case ixgbe_mac_82599EB:
170 if (direction == -1) {
171 /* other causes */
172 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
173 index = ((queue & 1) * 8);
174 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
175 ivar &= ~(0xFF << index);
176 ivar |= (msix_vector << index);
177 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
178 break;
179 } else {
180 /* tx or rx causes */
181 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
182 index = ((16 * (queue & 1)) + (8 * direction));
183 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
184 ivar &= ~(0xFF << index);
185 ivar |= (msix_vector << index);
186 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
187 break;
188 }
189 default:
190 break;
191 }
192 }
193
194 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
195 u64 qmask)
196 {
197 u32 mask;
198
199 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
200 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
201 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
202 } else {
203 mask = (qmask & 0xFFFFFFFF);
204 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
205 mask = (qmask >> 32);
206 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
207 }
208 }
209
210 static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
211 struct ixgbe_tx_buffer
212 *tx_buffer_info)
213 {
214 tx_buffer_info->dma = 0;
215 if (tx_buffer_info->skb) {
216 skb_dma_unmap(&adapter->pdev->dev, tx_buffer_info->skb,
217 DMA_TO_DEVICE);
218 dev_kfree_skb_any(tx_buffer_info->skb);
219 tx_buffer_info->skb = NULL;
220 }
221 tx_buffer_info->time_stamp = 0;
222 /* tx_buffer_info must be completely set up in the transmit path */
223 }
224
225 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
226 struct ixgbe_ring *tx_ring,
227 unsigned int eop)
228 {
229 struct ixgbe_hw *hw = &adapter->hw;
230
231 /* Detect a transmit hang in hardware, this serializes the
232 * check with the clearing of time_stamp and movement of eop */
233 adapter->detect_tx_hung = false;
234 if (tx_ring->tx_buffer_info[eop].time_stamp &&
235 time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
236 !(IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & IXGBE_TFCS_TXOFF)) {
237 /* detected Tx unit hang */
238 union ixgbe_adv_tx_desc *tx_desc;
239 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
240 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
241 " Tx Queue <%d>\n"
242 " TDH, TDT <%x>, <%x>\n"
243 " next_to_use <%x>\n"
244 " next_to_clean <%x>\n"
245 "tx_buffer_info[next_to_clean]\n"
246 " time_stamp <%lx>\n"
247 " jiffies <%lx>\n",
248 tx_ring->queue_index,
249 IXGBE_READ_REG(hw, tx_ring->head),
250 IXGBE_READ_REG(hw, tx_ring->tail),
251 tx_ring->next_to_use, eop,
252 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
253 return true;
254 }
255
256 return false;
257 }
258
259 #define IXGBE_MAX_TXD_PWR 14
260 #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
261
262 /* Tx Descriptors needed, worst case */
263 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
264 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
265 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
266 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
267
268 static void ixgbe_tx_timeout(struct net_device *netdev);
269
270 /**
271 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
272 * @q_vector: structure containing interrupt and ring information
273 * @tx_ring: tx ring to clean
274 **/
275 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
276 struct ixgbe_ring *tx_ring)
277 {
278 struct ixgbe_adapter *adapter = q_vector->adapter;
279 struct net_device *netdev = adapter->netdev;
280 union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
281 struct ixgbe_tx_buffer *tx_buffer_info;
282 unsigned int i, eop, count = 0;
283 unsigned int total_bytes = 0, total_packets = 0;
284
285 i = tx_ring->next_to_clean;
286 eop = tx_ring->tx_buffer_info[i].next_to_watch;
287 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
288
289 while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
290 (count < tx_ring->work_limit)) {
291 bool cleaned = false;
292 for ( ; !cleaned; count++) {
293 struct sk_buff *skb;
294 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
295 tx_buffer_info = &tx_ring->tx_buffer_info[i];
296 cleaned = (i == eop);
297 skb = tx_buffer_info->skb;
298
299 if (cleaned && skb) {
300 unsigned int segs, bytecount;
301 unsigned int hlen = skb_headlen(skb);
302
303 /* gso_segs is currently only valid for tcp */
304 segs = skb_shinfo(skb)->gso_segs ?: 1;
305 #ifdef IXGBE_FCOE
306 /* adjust for FCoE Sequence Offload */
307 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
308 && (skb->protocol == htons(ETH_P_FCOE)) &&
309 skb_is_gso(skb)) {
310 hlen = skb_transport_offset(skb) +
311 sizeof(struct fc_frame_header) +
312 sizeof(struct fcoe_crc_eof);
313 segs = DIV_ROUND_UP(skb->len - hlen,
314 skb_shinfo(skb)->gso_size);
315 }
316 #endif /* IXGBE_FCOE */
317 /* multiply data chunks by size of headers */
318 bytecount = ((segs - 1) * hlen) + skb->len;
319 total_packets += segs;
320 total_bytes += bytecount;
321 }
322
323 ixgbe_unmap_and_free_tx_resource(adapter,
324 tx_buffer_info);
325
326 tx_desc->wb.status = 0;
327
328 i++;
329 if (i == tx_ring->count)
330 i = 0;
331 }
332
333 eop = tx_ring->tx_buffer_info[i].next_to_watch;
334 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
335 }
336
337 tx_ring->next_to_clean = i;
338
339 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
340 if (unlikely(count && netif_carrier_ok(netdev) &&
341 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
342 /* Make sure that anybody stopping the queue after this
343 * sees the new next_to_clean.
344 */
345 smp_mb();
346 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
347 !test_bit(__IXGBE_DOWN, &adapter->state)) {
348 netif_wake_subqueue(netdev, tx_ring->queue_index);
349 ++adapter->restart_queue;
350 }
351 }
352
353 if (adapter->detect_tx_hung) {
354 if (ixgbe_check_tx_hang(adapter, tx_ring, i)) {
355 /* schedule immediate reset if we believe we hung */
356 DPRINTK(PROBE, INFO,
357 "tx hang %d detected, resetting adapter\n",
358 adapter->tx_timeout_count + 1);
359 ixgbe_tx_timeout(adapter->netdev);
360 }
361 }
362
363 /* re-arm the interrupt */
364 if (count >= tx_ring->work_limit)
365 ixgbe_irq_rearm_queues(adapter, ((u64)1 << q_vector->v_idx));
366
367 tx_ring->total_bytes += total_bytes;
368 tx_ring->total_packets += total_packets;
369 tx_ring->stats.packets += total_packets;
370 tx_ring->stats.bytes += total_bytes;
371 adapter->net_stats.tx_bytes += total_bytes;
372 adapter->net_stats.tx_packets += total_packets;
373 return (count < tx_ring->work_limit);
374 }
375
376 #ifdef CONFIG_IXGBE_DCA
377 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
378 struct ixgbe_ring *rx_ring)
379 {
380 u32 rxctrl;
381 int cpu = get_cpu();
382 int q = rx_ring - adapter->rx_ring;
383
384 if (rx_ring->cpu != cpu) {
385 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
386 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
387 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
388 rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
389 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
390 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
391 rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
392 IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
393 }
394 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
395 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
396 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
397 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_WRO_EN |
398 IXGBE_DCA_RXCTRL_DESC_HSRO_EN);
399 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
400 rx_ring->cpu = cpu;
401 }
402 put_cpu();
403 }
404
405 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
406 struct ixgbe_ring *tx_ring)
407 {
408 u32 txctrl;
409 int cpu = get_cpu();
410 int q = tx_ring - adapter->tx_ring;
411
412 if (tx_ring->cpu != cpu) {
413 txctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q));
414 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
415 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
416 txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
417 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
418 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
419 txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
420 IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
421 }
422 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
423 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q), txctrl);
424 tx_ring->cpu = cpu;
425 }
426 put_cpu();
427 }
428
429 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
430 {
431 int i;
432
433 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
434 return;
435
436 /* always use CB2 mode, difference is masked in the CB driver */
437 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
438
439 for (i = 0; i < adapter->num_tx_queues; i++) {
440 adapter->tx_ring[i].cpu = -1;
441 ixgbe_update_tx_dca(adapter, &adapter->tx_ring[i]);
442 }
443 for (i = 0; i < adapter->num_rx_queues; i++) {
444 adapter->rx_ring[i].cpu = -1;
445 ixgbe_update_rx_dca(adapter, &adapter->rx_ring[i]);
446 }
447 }
448
449 static int __ixgbe_notify_dca(struct device *dev, void *data)
450 {
451 struct net_device *netdev = dev_get_drvdata(dev);
452 struct ixgbe_adapter *adapter = netdev_priv(netdev);
453 unsigned long event = *(unsigned long *)data;
454
455 switch (event) {
456 case DCA_PROVIDER_ADD:
457 /* if we're already enabled, don't do it again */
458 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
459 break;
460 if (dca_add_requester(dev) == 0) {
461 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
462 ixgbe_setup_dca(adapter);
463 break;
464 }
465 /* Fall Through since DCA is disabled. */
466 case DCA_PROVIDER_REMOVE:
467 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
468 dca_remove_requester(dev);
469 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
470 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
471 }
472 break;
473 }
474
475 return 0;
476 }
477
478 #endif /* CONFIG_IXGBE_DCA */
479 /**
480 * ixgbe_receive_skb - Send a completed packet up the stack
481 * @adapter: board private structure
482 * @skb: packet to send up
483 * @status: hardware indication of status of receive
484 * @rx_ring: rx descriptor ring (for a specific queue) to setup
485 * @rx_desc: rx descriptor
486 **/
487 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
488 struct sk_buff *skb, u8 status,
489 struct ixgbe_ring *ring,
490 union ixgbe_adv_rx_desc *rx_desc)
491 {
492 struct ixgbe_adapter *adapter = q_vector->adapter;
493 struct napi_struct *napi = &q_vector->napi;
494 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
495 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
496
497 skb_record_rx_queue(skb, ring->queue_index);
498 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
499 if (adapter->vlgrp && is_vlan && (tag & VLAN_VID_MASK))
500 vlan_gro_receive(napi, adapter->vlgrp, tag, skb);
501 else
502 napi_gro_receive(napi, skb);
503 } else {
504 if (adapter->vlgrp && is_vlan && (tag & VLAN_VID_MASK))
505 vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
506 else
507 netif_rx(skb);
508 }
509 }
510
511 /**
512 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
513 * @adapter: address of board private structure
514 * @status_err: hardware indication of status of receive
515 * @skb: skb currently being received and modified
516 **/
517 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
518 union ixgbe_adv_rx_desc *rx_desc,
519 struct sk_buff *skb)
520 {
521 u32 status_err = le32_to_cpu(rx_desc->wb.upper.status_error);
522
523 skb->ip_summed = CHECKSUM_NONE;
524
525 /* Rx csum disabled */
526 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
527 return;
528
529 /* if IP and error */
530 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
531 (status_err & IXGBE_RXDADV_ERR_IPE)) {
532 adapter->hw_csum_rx_error++;
533 return;
534 }
535
536 if (!(status_err & IXGBE_RXD_STAT_L4CS))
537 return;
538
539 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
540 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
541
542 /*
543 * 82599 errata, UDP frames with a 0 checksum can be marked as
544 * checksum errors.
545 */
546 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
547 (adapter->hw.mac.type == ixgbe_mac_82599EB))
548 return;
549
550 adapter->hw_csum_rx_error++;
551 return;
552 }
553
554 /* It must be a TCP or UDP packet with a valid checksum */
555 skb->ip_summed = CHECKSUM_UNNECESSARY;
556 adapter->hw_csum_rx_good++;
557 }
558
559 static inline void ixgbe_release_rx_desc(struct ixgbe_hw *hw,
560 struct ixgbe_ring *rx_ring, u32 val)
561 {
562 /*
563 * Force memory writes to complete before letting h/w
564 * know there are new descriptors to fetch. (Only
565 * applicable for weak-ordered memory model archs,
566 * such as IA-64).
567 */
568 wmb();
569 IXGBE_WRITE_REG(hw, IXGBE_RDT(rx_ring->reg_idx), val);
570 }
571
572 /**
573 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
574 * @adapter: address of board private structure
575 **/
576 static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
577 struct ixgbe_ring *rx_ring,
578 int cleaned_count)
579 {
580 struct pci_dev *pdev = adapter->pdev;
581 union ixgbe_adv_rx_desc *rx_desc;
582 struct ixgbe_rx_buffer *bi;
583 unsigned int i;
584
585 i = rx_ring->next_to_use;
586 bi = &rx_ring->rx_buffer_info[i];
587
588 while (cleaned_count--) {
589 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
590
591 if (!bi->page_dma &&
592 (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)) {
593 if (!bi->page) {
594 bi->page = alloc_page(GFP_ATOMIC);
595 if (!bi->page) {
596 adapter->alloc_rx_page_failed++;
597 goto no_buffers;
598 }
599 bi->page_offset = 0;
600 } else {
601 /* use a half page if we're re-using */
602 bi->page_offset ^= (PAGE_SIZE / 2);
603 }
604
605 bi->page_dma = pci_map_page(pdev, bi->page,
606 bi->page_offset,
607 (PAGE_SIZE / 2),
608 PCI_DMA_FROMDEVICE);
609 }
610
611 if (!bi->skb) {
612 struct sk_buff *skb;
613 skb = netdev_alloc_skb(adapter->netdev,
614 (rx_ring->rx_buf_len +
615 NET_IP_ALIGN));
616
617 if (!skb) {
618 adapter->alloc_rx_buff_failed++;
619 goto no_buffers;
620 }
621
622 /*
623 * Make buffer alignment 2 beyond a 16 byte boundary
624 * this will result in a 16 byte aligned IP header after
625 * the 14 byte MAC header is removed
626 */
627 skb_reserve(skb, NET_IP_ALIGN);
628
629 bi->skb = skb;
630 bi->dma = pci_map_single(pdev, skb->data,
631 rx_ring->rx_buf_len,
632 PCI_DMA_FROMDEVICE);
633 }
634 /* Refresh the desc even if buffer_addrs didn't change because
635 * each write-back erases this info. */
636 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
637 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
638 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
639 } else {
640 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
641 }
642
643 i++;
644 if (i == rx_ring->count)
645 i = 0;
646 bi = &rx_ring->rx_buffer_info[i];
647 }
648
649 no_buffers:
650 if (rx_ring->next_to_use != i) {
651 rx_ring->next_to_use = i;
652 if (i-- == 0)
653 i = (rx_ring->count - 1);
654
655 ixgbe_release_rx_desc(&adapter->hw, rx_ring, i);
656 }
657 }
658
659 static inline u16 ixgbe_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
660 {
661 return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
662 }
663
664 static inline u16 ixgbe_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
665 {
666 return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
667 }
668
669 static inline u32 ixgbe_get_rsc_count(union ixgbe_adv_rx_desc *rx_desc)
670 {
671 return (le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
672 IXGBE_RXDADV_RSCCNT_MASK) >>
673 IXGBE_RXDADV_RSCCNT_SHIFT;
674 }
675
676 /**
677 * ixgbe_transform_rsc_queue - change rsc queue into a full packet
678 * @skb: pointer to the last skb in the rsc queue
679 *
680 * This function changes a queue full of hw rsc buffers into a completed
681 * packet. It uses the ->prev pointers to find the first packet and then
682 * turns it into the frag list owner.
683 **/
684 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb)
685 {
686 unsigned int frag_list_size = 0;
687
688 while (skb->prev) {
689 struct sk_buff *prev = skb->prev;
690 frag_list_size += skb->len;
691 skb->prev = NULL;
692 skb = prev;
693 }
694
695 skb_shinfo(skb)->frag_list = skb->next;
696 skb->next = NULL;
697 skb->len += frag_list_size;
698 skb->data_len += frag_list_size;
699 skb->truesize += frag_list_size;
700 return skb;
701 }
702
703 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
704 struct ixgbe_ring *rx_ring,
705 int *work_done, int work_to_do)
706 {
707 struct ixgbe_adapter *adapter = q_vector->adapter;
708 struct pci_dev *pdev = adapter->pdev;
709 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
710 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
711 struct sk_buff *skb;
712 unsigned int i, rsc_count = 0;
713 u32 len, staterr;
714 u16 hdr_info;
715 bool cleaned = false;
716 int cleaned_count = 0;
717 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
718 #ifdef IXGBE_FCOE
719 int ddp_bytes = 0;
720 #endif /* IXGBE_FCOE */
721
722 i = rx_ring->next_to_clean;
723 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
724 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
725 rx_buffer_info = &rx_ring->rx_buffer_info[i];
726
727 while (staterr & IXGBE_RXD_STAT_DD) {
728 u32 upper_len = 0;
729 if (*work_done >= work_to_do)
730 break;
731 (*work_done)++;
732
733 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
734 hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
735 len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
736 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
737 if (hdr_info & IXGBE_RXDADV_SPH)
738 adapter->rx_hdr_split++;
739 if (len > IXGBE_RX_HDR_SIZE)
740 len = IXGBE_RX_HDR_SIZE;
741 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
742 } else {
743 len = le16_to_cpu(rx_desc->wb.upper.length);
744 }
745
746 cleaned = true;
747 skb = rx_buffer_info->skb;
748 prefetch(skb->data - NET_IP_ALIGN);
749 rx_buffer_info->skb = NULL;
750
751 if (rx_buffer_info->dma) {
752 pci_unmap_single(pdev, rx_buffer_info->dma,
753 rx_ring->rx_buf_len,
754 PCI_DMA_FROMDEVICE);
755 rx_buffer_info->dma = 0;
756 skb_put(skb, len);
757 }
758
759 if (upper_len) {
760 pci_unmap_page(pdev, rx_buffer_info->page_dma,
761 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
762 rx_buffer_info->page_dma = 0;
763 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
764 rx_buffer_info->page,
765 rx_buffer_info->page_offset,
766 upper_len);
767
768 if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
769 (page_count(rx_buffer_info->page) != 1))
770 rx_buffer_info->page = NULL;
771 else
772 get_page(rx_buffer_info->page);
773
774 skb->len += upper_len;
775 skb->data_len += upper_len;
776 skb->truesize += upper_len;
777 }
778
779 i++;
780 if (i == rx_ring->count)
781 i = 0;
782
783 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
784 prefetch(next_rxd);
785 cleaned_count++;
786
787 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
788 rsc_count = ixgbe_get_rsc_count(rx_desc);
789
790 if (rsc_count) {
791 u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
792 IXGBE_RXDADV_NEXTP_SHIFT;
793 next_buffer = &rx_ring->rx_buffer_info[nextp];
794 rx_ring->rsc_count += (rsc_count - 1);
795 } else {
796 next_buffer = &rx_ring->rx_buffer_info[i];
797 }
798
799 if (staterr & IXGBE_RXD_STAT_EOP) {
800 if (skb->prev)
801 skb = ixgbe_transform_rsc_queue(skb);
802 rx_ring->stats.packets++;
803 rx_ring->stats.bytes += skb->len;
804 } else {
805 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
806 rx_buffer_info->skb = next_buffer->skb;
807 rx_buffer_info->dma = next_buffer->dma;
808 next_buffer->skb = skb;
809 next_buffer->dma = 0;
810 } else {
811 skb->next = next_buffer->skb;
812 skb->next->prev = skb;
813 }
814 adapter->non_eop_descs++;
815 goto next_desc;
816 }
817
818 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
819 dev_kfree_skb_irq(skb);
820 goto next_desc;
821 }
822
823 ixgbe_rx_checksum(adapter, rx_desc, skb);
824
825 /* probably a little skewed due to removing CRC */
826 total_rx_bytes += skb->len;
827 total_rx_packets++;
828
829 skb->protocol = eth_type_trans(skb, adapter->netdev);
830 #ifdef IXGBE_FCOE
831 /* if ddp, not passing to ULD unless for FCP_RSP or error */
832 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
833 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
834 if (!ddp_bytes)
835 goto next_desc;
836 }
837 #endif /* IXGBE_FCOE */
838 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
839
840 next_desc:
841 rx_desc->wb.upper.status_error = 0;
842
843 /* return some buffers to hardware, one at a time is too slow */
844 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
845 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
846 cleaned_count = 0;
847 }
848
849 /* use prefetched values */
850 rx_desc = next_rxd;
851 rx_buffer_info = &rx_ring->rx_buffer_info[i];
852
853 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
854 }
855
856 rx_ring->next_to_clean = i;
857 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
858
859 if (cleaned_count)
860 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
861
862 #ifdef IXGBE_FCOE
863 /* include DDPed FCoE data */
864 if (ddp_bytes > 0) {
865 unsigned int mss;
866
867 mss = adapter->netdev->mtu - sizeof(struct fcoe_hdr) -
868 sizeof(struct fc_frame_header) -
869 sizeof(struct fcoe_crc_eof);
870 if (mss > 512)
871 mss &= ~511;
872 total_rx_bytes += ddp_bytes;
873 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
874 }
875 #endif /* IXGBE_FCOE */
876
877 rx_ring->total_packets += total_rx_packets;
878 rx_ring->total_bytes += total_rx_bytes;
879 adapter->net_stats.rx_bytes += total_rx_bytes;
880 adapter->net_stats.rx_packets += total_rx_packets;
881
882 return cleaned;
883 }
884
885 static int ixgbe_clean_rxonly(struct napi_struct *, int);
886 /**
887 * ixgbe_configure_msix - Configure MSI-X hardware
888 * @adapter: board private structure
889 *
890 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
891 * interrupts.
892 **/
893 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
894 {
895 struct ixgbe_q_vector *q_vector;
896 int i, j, q_vectors, v_idx, r_idx;
897 u32 mask;
898
899 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
900
901 /*
902 * Populate the IVAR table and set the ITR values to the
903 * corresponding register.
904 */
905 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
906 q_vector = adapter->q_vector[v_idx];
907 /* XXX for_each_bit(...) */
908 r_idx = find_first_bit(q_vector->rxr_idx,
909 adapter->num_rx_queues);
910
911 for (i = 0; i < q_vector->rxr_count; i++) {
912 j = adapter->rx_ring[r_idx].reg_idx;
913 ixgbe_set_ivar(adapter, 0, j, v_idx);
914 r_idx = find_next_bit(q_vector->rxr_idx,
915 adapter->num_rx_queues,
916 r_idx + 1);
917 }
918 r_idx = find_first_bit(q_vector->txr_idx,
919 adapter->num_tx_queues);
920
921 for (i = 0; i < q_vector->txr_count; i++) {
922 j = adapter->tx_ring[r_idx].reg_idx;
923 ixgbe_set_ivar(adapter, 1, j, v_idx);
924 r_idx = find_next_bit(q_vector->txr_idx,
925 adapter->num_tx_queues,
926 r_idx + 1);
927 }
928
929 if (q_vector->txr_count && !q_vector->rxr_count)
930 /* tx only */
931 q_vector->eitr = adapter->tx_eitr_param;
932 else if (q_vector->rxr_count)
933 /* rx or mixed */
934 q_vector->eitr = adapter->rx_eitr_param;
935
936 ixgbe_write_eitr(q_vector);
937 }
938
939 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
940 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
941 v_idx);
942 else if (adapter->hw.mac.type == ixgbe_mac_82599EB)
943 ixgbe_set_ivar(adapter, -1, 1, v_idx);
944 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
945
946 /* set up to autoclear timer, and the vectors */
947 mask = IXGBE_EIMS_ENABLE_MASK;
948 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
949 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
950 }
951
952 enum latency_range {
953 lowest_latency = 0,
954 low_latency = 1,
955 bulk_latency = 2,
956 latency_invalid = 255
957 };
958
959 /**
960 * ixgbe_update_itr - update the dynamic ITR value based on statistics
961 * @adapter: pointer to adapter
962 * @eitr: eitr setting (ints per sec) to give last timeslice
963 * @itr_setting: current throttle rate in ints/second
964 * @packets: the number of packets during this measurement interval
965 * @bytes: the number of bytes during this measurement interval
966 *
967 * Stores a new ITR value based on packets and byte
968 * counts during the last interrupt. The advantage of per interrupt
969 * computation is faster updates and more accurate ITR for the current
970 * traffic pattern. Constants in this function were computed
971 * based on theoretical maximum wire speed and thresholds were set based
972 * on testing data as well as attempting to minimize response time
973 * while increasing bulk throughput.
974 * this functionality is controlled by the InterruptThrottleRate module
975 * parameter (see ixgbe_param.c)
976 **/
977 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
978 u32 eitr, u8 itr_setting,
979 int packets, int bytes)
980 {
981 unsigned int retval = itr_setting;
982 u32 timepassed_us;
983 u64 bytes_perint;
984
985 if (packets == 0)
986 goto update_itr_done;
987
988
989 /* simple throttlerate management
990 * 0-20MB/s lowest (100000 ints/s)
991 * 20-100MB/s low (20000 ints/s)
992 * 100-1249MB/s bulk (8000 ints/s)
993 */
994 /* what was last interrupt timeslice? */
995 timepassed_us = 1000000/eitr;
996 bytes_perint = bytes / timepassed_us; /* bytes/usec */
997
998 switch (itr_setting) {
999 case lowest_latency:
1000 if (bytes_perint > adapter->eitr_low)
1001 retval = low_latency;
1002 break;
1003 case low_latency:
1004 if (bytes_perint > adapter->eitr_high)
1005 retval = bulk_latency;
1006 else if (bytes_perint <= adapter->eitr_low)
1007 retval = lowest_latency;
1008 break;
1009 case bulk_latency:
1010 if (bytes_perint <= adapter->eitr_high)
1011 retval = low_latency;
1012 break;
1013 }
1014
1015 update_itr_done:
1016 return retval;
1017 }
1018
1019 /**
1020 * ixgbe_write_eitr - write EITR register in hardware specific way
1021 * @q_vector: structure containing interrupt and ring information
1022 *
1023 * This function is made to be called by ethtool and by the driver
1024 * when it needs to update EITR registers at runtime. Hardware
1025 * specific quirks/differences are taken care of here.
1026 */
1027 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1028 {
1029 struct ixgbe_adapter *adapter = q_vector->adapter;
1030 struct ixgbe_hw *hw = &adapter->hw;
1031 int v_idx = q_vector->v_idx;
1032 u32 itr_reg = EITR_INTS_PER_SEC_TO_REG(q_vector->eitr);
1033
1034 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1035 /* must write high and low 16 bits to reset counter */
1036 itr_reg |= (itr_reg << 16);
1037 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1038 /*
1039 * set the WDIS bit to not clear the timer bits and cause an
1040 * immediate assertion of the interrupt
1041 */
1042 itr_reg |= IXGBE_EITR_CNT_WDIS;
1043 }
1044 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1045 }
1046
1047 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
1048 {
1049 struct ixgbe_adapter *adapter = q_vector->adapter;
1050 u32 new_itr;
1051 u8 current_itr, ret_itr;
1052 int i, r_idx;
1053 struct ixgbe_ring *rx_ring, *tx_ring;
1054
1055 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1056 for (i = 0; i < q_vector->txr_count; i++) {
1057 tx_ring = &(adapter->tx_ring[r_idx]);
1058 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1059 q_vector->tx_itr,
1060 tx_ring->total_packets,
1061 tx_ring->total_bytes);
1062 /* if the result for this queue would decrease interrupt
1063 * rate for this vector then use that result */
1064 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
1065 q_vector->tx_itr - 1 : ret_itr);
1066 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1067 r_idx + 1);
1068 }
1069
1070 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1071 for (i = 0; i < q_vector->rxr_count; i++) {
1072 rx_ring = &(adapter->rx_ring[r_idx]);
1073 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1074 q_vector->rx_itr,
1075 rx_ring->total_packets,
1076 rx_ring->total_bytes);
1077 /* if the result for this queue would decrease interrupt
1078 * rate for this vector then use that result */
1079 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
1080 q_vector->rx_itr - 1 : ret_itr);
1081 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1082 r_idx + 1);
1083 }
1084
1085 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1086
1087 switch (current_itr) {
1088 /* counts and packets in update_itr are dependent on these numbers */
1089 case lowest_latency:
1090 new_itr = 100000;
1091 break;
1092 case low_latency:
1093 new_itr = 20000; /* aka hwitr = ~200 */
1094 break;
1095 case bulk_latency:
1096 default:
1097 new_itr = 8000;
1098 break;
1099 }
1100
1101 if (new_itr != q_vector->eitr) {
1102 /* do an exponential smoothing */
1103 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1104
1105 /* save the algorithm value here, not the smoothed one */
1106 q_vector->eitr = new_itr;
1107
1108 ixgbe_write_eitr(q_vector);
1109 }
1110
1111 return;
1112 }
1113
1114 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1115 {
1116 struct ixgbe_hw *hw = &adapter->hw;
1117
1118 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1119 (eicr & IXGBE_EICR_GPI_SDP1)) {
1120 DPRINTK(PROBE, CRIT, "Fan has stopped, replace the adapter\n");
1121 /* write to clear the interrupt */
1122 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1123 }
1124 }
1125
1126 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1127 {
1128 struct ixgbe_hw *hw = &adapter->hw;
1129
1130 if (eicr & IXGBE_EICR_GPI_SDP1) {
1131 /* Clear the interrupt */
1132 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1133 schedule_work(&adapter->multispeed_fiber_task);
1134 } else if (eicr & IXGBE_EICR_GPI_SDP2) {
1135 /* Clear the interrupt */
1136 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1137 schedule_work(&adapter->sfp_config_module_task);
1138 } else {
1139 /* Interrupt isn't for us... */
1140 return;
1141 }
1142 }
1143
1144 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1145 {
1146 struct ixgbe_hw *hw = &adapter->hw;
1147
1148 adapter->lsc_int++;
1149 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1150 adapter->link_check_timeout = jiffies;
1151 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1152 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1153 schedule_work(&adapter->watchdog_task);
1154 }
1155 }
1156
1157 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1158 {
1159 struct net_device *netdev = data;
1160 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1161 struct ixgbe_hw *hw = &adapter->hw;
1162 u32 eicr;
1163
1164 /*
1165 * Workaround for Silicon errata. Use clear-by-write instead
1166 * of clear-by-read. Reading with EICS will return the
1167 * interrupt causes without clearing, which later be done
1168 * with the write to EICR.
1169 */
1170 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1171 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1172
1173 if (eicr & IXGBE_EICR_LSC)
1174 ixgbe_check_lsc(adapter);
1175
1176 if (hw->mac.type == ixgbe_mac_82598EB)
1177 ixgbe_check_fan_failure(adapter, eicr);
1178
1179 if (hw->mac.type == ixgbe_mac_82599EB) {
1180 ixgbe_check_sfp_event(adapter, eicr);
1181
1182 /* Handle Flow Director Full threshold interrupt */
1183 if (eicr & IXGBE_EICR_FLOW_DIR) {
1184 int i;
1185 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_FLOW_DIR);
1186 /* Disable transmits before FDIR Re-initialization */
1187 netif_tx_stop_all_queues(netdev);
1188 for (i = 0; i < adapter->num_tx_queues; i++) {
1189 struct ixgbe_ring *tx_ring =
1190 &adapter->tx_ring[i];
1191 if (test_and_clear_bit(__IXGBE_FDIR_INIT_DONE,
1192 &tx_ring->reinit_state))
1193 schedule_work(&adapter->fdir_reinit_task);
1194 }
1195 }
1196 }
1197 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1198 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
1199
1200 return IRQ_HANDLED;
1201 }
1202
1203 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1204 u64 qmask)
1205 {
1206 u32 mask;
1207
1208 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1209 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1210 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1211 } else {
1212 mask = (qmask & 0xFFFFFFFF);
1213 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(0), mask);
1214 mask = (qmask >> 32);
1215 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(1), mask);
1216 }
1217 /* skip the flush */
1218 }
1219
1220 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1221 u64 qmask)
1222 {
1223 u32 mask;
1224
1225 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1226 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1227 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, mask);
1228 } else {
1229 mask = (qmask & 0xFFFFFFFF);
1230 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), mask);
1231 mask = (qmask >> 32);
1232 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), mask);
1233 }
1234 /* skip the flush */
1235 }
1236
1237 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
1238 {
1239 struct ixgbe_q_vector *q_vector = data;
1240 struct ixgbe_adapter *adapter = q_vector->adapter;
1241 struct ixgbe_ring *tx_ring;
1242 int i, r_idx;
1243
1244 if (!q_vector->txr_count)
1245 return IRQ_HANDLED;
1246
1247 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1248 for (i = 0; i < q_vector->txr_count; i++) {
1249 tx_ring = &(adapter->tx_ring[r_idx]);
1250 tx_ring->total_bytes = 0;
1251 tx_ring->total_packets = 0;
1252 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1253 r_idx + 1);
1254 }
1255
1256 /* disable interrupts on this vector only */
1257 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1258 napi_schedule(&q_vector->napi);
1259
1260 return IRQ_HANDLED;
1261 }
1262
1263 /**
1264 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
1265 * @irq: unused
1266 * @data: pointer to our q_vector struct for this interrupt vector
1267 **/
1268 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
1269 {
1270 struct ixgbe_q_vector *q_vector = data;
1271 struct ixgbe_adapter *adapter = q_vector->adapter;
1272 struct ixgbe_ring *rx_ring;
1273 int r_idx;
1274 int i;
1275
1276 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1277 for (i = 0; i < q_vector->rxr_count; i++) {
1278 rx_ring = &(adapter->rx_ring[r_idx]);
1279 rx_ring->total_bytes = 0;
1280 rx_ring->total_packets = 0;
1281 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1282 r_idx + 1);
1283 }
1284
1285 if (!q_vector->rxr_count)
1286 return IRQ_HANDLED;
1287
1288 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1289 rx_ring = &(adapter->rx_ring[r_idx]);
1290 /* disable interrupts on this vector only */
1291 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1292 napi_schedule(&q_vector->napi);
1293
1294 return IRQ_HANDLED;
1295 }
1296
1297 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1298 {
1299 struct ixgbe_q_vector *q_vector = data;
1300 struct ixgbe_adapter *adapter = q_vector->adapter;
1301 struct ixgbe_ring *ring;
1302 int r_idx;
1303 int i;
1304
1305 if (!q_vector->txr_count && !q_vector->rxr_count)
1306 return IRQ_HANDLED;
1307
1308 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1309 for (i = 0; i < q_vector->txr_count; i++) {
1310 ring = &(adapter->tx_ring[r_idx]);
1311 ring->total_bytes = 0;
1312 ring->total_packets = 0;
1313 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1314 r_idx + 1);
1315 }
1316
1317 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1318 for (i = 0; i < q_vector->rxr_count; i++) {
1319 ring = &(adapter->rx_ring[r_idx]);
1320 ring->total_bytes = 0;
1321 ring->total_packets = 0;
1322 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1323 r_idx + 1);
1324 }
1325
1326 /* disable interrupts on this vector only */
1327 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1328 napi_schedule(&q_vector->napi);
1329
1330 return IRQ_HANDLED;
1331 }
1332
1333 /**
1334 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1335 * @napi: napi struct with our devices info in it
1336 * @budget: amount of work driver is allowed to do this pass, in packets
1337 *
1338 * This function is optimized for cleaning one queue only on a single
1339 * q_vector!!!
1340 **/
1341 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1342 {
1343 struct ixgbe_q_vector *q_vector =
1344 container_of(napi, struct ixgbe_q_vector, napi);
1345 struct ixgbe_adapter *adapter = q_vector->adapter;
1346 struct ixgbe_ring *rx_ring = NULL;
1347 int work_done = 0;
1348 long r_idx;
1349
1350 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1351 rx_ring = &(adapter->rx_ring[r_idx]);
1352 #ifdef CONFIG_IXGBE_DCA
1353 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1354 ixgbe_update_rx_dca(adapter, rx_ring);
1355 #endif
1356
1357 ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
1358
1359 /* If all Rx work done, exit the polling mode */
1360 if (work_done < budget) {
1361 napi_complete(napi);
1362 if (adapter->rx_itr_setting & 1)
1363 ixgbe_set_itr_msix(q_vector);
1364 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1365 ixgbe_irq_enable_queues(adapter,
1366 ((u64)1 << q_vector->v_idx));
1367 }
1368
1369 return work_done;
1370 }
1371
1372 /**
1373 * ixgbe_clean_rxtx_many - msix (aka one shot) rx clean routine
1374 * @napi: napi struct with our devices info in it
1375 * @budget: amount of work driver is allowed to do this pass, in packets
1376 *
1377 * This function will clean more than one rx queue associated with a
1378 * q_vector.
1379 **/
1380 static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
1381 {
1382 struct ixgbe_q_vector *q_vector =
1383 container_of(napi, struct ixgbe_q_vector, napi);
1384 struct ixgbe_adapter *adapter = q_vector->adapter;
1385 struct ixgbe_ring *ring = NULL;
1386 int work_done = 0, i;
1387 long r_idx;
1388 bool tx_clean_complete = true;
1389
1390 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1391 for (i = 0; i < q_vector->txr_count; i++) {
1392 ring = &(adapter->tx_ring[r_idx]);
1393 #ifdef CONFIG_IXGBE_DCA
1394 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1395 ixgbe_update_tx_dca(adapter, ring);
1396 #endif
1397 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
1398 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1399 r_idx + 1);
1400 }
1401
1402 /* attempt to distribute budget to each queue fairly, but don't allow
1403 * the budget to go below 1 because we'll exit polling */
1404 budget /= (q_vector->rxr_count ?: 1);
1405 budget = max(budget, 1);
1406 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1407 for (i = 0; i < q_vector->rxr_count; i++) {
1408 ring = &(adapter->rx_ring[r_idx]);
1409 #ifdef CONFIG_IXGBE_DCA
1410 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1411 ixgbe_update_rx_dca(adapter, ring);
1412 #endif
1413 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
1414 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1415 r_idx + 1);
1416 }
1417
1418 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1419 ring = &(adapter->rx_ring[r_idx]);
1420 /* If all Rx work done, exit the polling mode */
1421 if (work_done < budget) {
1422 napi_complete(napi);
1423 if (adapter->rx_itr_setting & 1)
1424 ixgbe_set_itr_msix(q_vector);
1425 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1426 ixgbe_irq_enable_queues(adapter,
1427 ((u64)1 << q_vector->v_idx));
1428 return 0;
1429 }
1430
1431 return work_done;
1432 }
1433
1434 /**
1435 * ixgbe_clean_txonly - msix (aka one shot) tx clean routine
1436 * @napi: napi struct with our devices info in it
1437 * @budget: amount of work driver is allowed to do this pass, in packets
1438 *
1439 * This function is optimized for cleaning one queue only on a single
1440 * q_vector!!!
1441 **/
1442 static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
1443 {
1444 struct ixgbe_q_vector *q_vector =
1445 container_of(napi, struct ixgbe_q_vector, napi);
1446 struct ixgbe_adapter *adapter = q_vector->adapter;
1447 struct ixgbe_ring *tx_ring = NULL;
1448 int work_done = 0;
1449 long r_idx;
1450
1451 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1452 tx_ring = &(adapter->tx_ring[r_idx]);
1453 #ifdef CONFIG_IXGBE_DCA
1454 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1455 ixgbe_update_tx_dca(adapter, tx_ring);
1456 #endif
1457
1458 if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
1459 work_done = budget;
1460
1461 /* If all Tx work done, exit the polling mode */
1462 if (work_done < budget) {
1463 napi_complete(napi);
1464 if (adapter->tx_itr_setting & 1)
1465 ixgbe_set_itr_msix(q_vector);
1466 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1467 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
1468 }
1469
1470 return work_done;
1471 }
1472
1473 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
1474 int r_idx)
1475 {
1476 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1477
1478 set_bit(r_idx, q_vector->rxr_idx);
1479 q_vector->rxr_count++;
1480 }
1481
1482 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
1483 int t_idx)
1484 {
1485 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1486
1487 set_bit(t_idx, q_vector->txr_idx);
1488 q_vector->txr_count++;
1489 }
1490
1491 /**
1492 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
1493 * @adapter: board private structure to initialize
1494 * @vectors: allotted vector count for descriptor rings
1495 *
1496 * This function maps descriptor rings to the queue-specific vectors
1497 * we were allotted through the MSI-X enabling code. Ideally, we'd have
1498 * one vector per ring/queue, but on a constrained vector budget, we
1499 * group the rings as "efficiently" as possible. You would add new
1500 * mapping configurations in here.
1501 **/
1502 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
1503 int vectors)
1504 {
1505 int v_start = 0;
1506 int rxr_idx = 0, txr_idx = 0;
1507 int rxr_remaining = adapter->num_rx_queues;
1508 int txr_remaining = adapter->num_tx_queues;
1509 int i, j;
1510 int rqpv, tqpv;
1511 int err = 0;
1512
1513 /* No mapping required if MSI-X is disabled. */
1514 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1515 goto out;
1516
1517 /*
1518 * The ideal configuration...
1519 * We have enough vectors to map one per queue.
1520 */
1521 if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1522 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1523 map_vector_to_rxq(adapter, v_start, rxr_idx);
1524
1525 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1526 map_vector_to_txq(adapter, v_start, txr_idx);
1527
1528 goto out;
1529 }
1530
1531 /*
1532 * If we don't have enough vectors for a 1-to-1
1533 * mapping, we'll have to group them so there are
1534 * multiple queues per vector.
1535 */
1536 /* Re-adjusting *qpv takes care of the remainder. */
1537 for (i = v_start; i < vectors; i++) {
1538 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
1539 for (j = 0; j < rqpv; j++) {
1540 map_vector_to_rxq(adapter, i, rxr_idx);
1541 rxr_idx++;
1542 rxr_remaining--;
1543 }
1544 }
1545 for (i = v_start; i < vectors; i++) {
1546 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
1547 for (j = 0; j < tqpv; j++) {
1548 map_vector_to_txq(adapter, i, txr_idx);
1549 txr_idx++;
1550 txr_remaining--;
1551 }
1552 }
1553
1554 out:
1555 return err;
1556 }
1557
1558 /**
1559 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
1560 * @adapter: board private structure
1561 *
1562 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
1563 * interrupts from the kernel.
1564 **/
1565 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
1566 {
1567 struct net_device *netdev = adapter->netdev;
1568 irqreturn_t (*handler)(int, void *);
1569 int i, vector, q_vectors, err;
1570 int ri=0, ti=0;
1571
1572 /* Decrement for Other and TCP Timer vectors */
1573 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1574
1575 /* Map the Tx/Rx rings to the vectors we were allotted. */
1576 err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
1577 if (err)
1578 goto out;
1579
1580 #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
1581 (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
1582 &ixgbe_msix_clean_many)
1583 for (vector = 0; vector < q_vectors; vector++) {
1584 handler = SET_HANDLER(adapter->q_vector[vector]);
1585
1586 if(handler == &ixgbe_msix_clean_rx) {
1587 sprintf(adapter->name[vector], "%s-%s-%d",
1588 netdev->name, "rx", ri++);
1589 }
1590 else if(handler == &ixgbe_msix_clean_tx) {
1591 sprintf(adapter->name[vector], "%s-%s-%d",
1592 netdev->name, "tx", ti++);
1593 }
1594 else
1595 sprintf(adapter->name[vector], "%s-%s-%d",
1596 netdev->name, "TxRx", vector);
1597
1598 err = request_irq(adapter->msix_entries[vector].vector,
1599 handler, 0, adapter->name[vector],
1600 adapter->q_vector[vector]);
1601 if (err) {
1602 DPRINTK(PROBE, ERR,
1603 "request_irq failed for MSIX interrupt "
1604 "Error: %d\n", err);
1605 goto free_queue_irqs;
1606 }
1607 }
1608
1609 sprintf(adapter->name[vector], "%s:lsc", netdev->name);
1610 err = request_irq(adapter->msix_entries[vector].vector,
1611 &ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
1612 if (err) {
1613 DPRINTK(PROBE, ERR,
1614 "request_irq for msix_lsc failed: %d\n", err);
1615 goto free_queue_irqs;
1616 }
1617
1618 return 0;
1619
1620 free_queue_irqs:
1621 for (i = vector - 1; i >= 0; i--)
1622 free_irq(adapter->msix_entries[--vector].vector,
1623 adapter->q_vector[i]);
1624 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
1625 pci_disable_msix(adapter->pdev);
1626 kfree(adapter->msix_entries);
1627 adapter->msix_entries = NULL;
1628 out:
1629 return err;
1630 }
1631
1632 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
1633 {
1634 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1635 u8 current_itr;
1636 u32 new_itr = q_vector->eitr;
1637 struct ixgbe_ring *rx_ring = &adapter->rx_ring[0];
1638 struct ixgbe_ring *tx_ring = &adapter->tx_ring[0];
1639
1640 q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
1641 q_vector->tx_itr,
1642 tx_ring->total_packets,
1643 tx_ring->total_bytes);
1644 q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
1645 q_vector->rx_itr,
1646 rx_ring->total_packets,
1647 rx_ring->total_bytes);
1648
1649 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1650
1651 switch (current_itr) {
1652 /* counts and packets in update_itr are dependent on these numbers */
1653 case lowest_latency:
1654 new_itr = 100000;
1655 break;
1656 case low_latency:
1657 new_itr = 20000; /* aka hwitr = ~200 */
1658 break;
1659 case bulk_latency:
1660 new_itr = 8000;
1661 break;
1662 default:
1663 break;
1664 }
1665
1666 if (new_itr != q_vector->eitr) {
1667 /* do an exponential smoothing */
1668 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1669
1670 /* save the algorithm value here, not the smoothed one */
1671 q_vector->eitr = new_itr;
1672
1673 ixgbe_write_eitr(q_vector);
1674 }
1675
1676 return;
1677 }
1678
1679 /**
1680 * ixgbe_irq_enable - Enable default interrupt generation settings
1681 * @adapter: board private structure
1682 **/
1683 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
1684 {
1685 u32 mask;
1686
1687 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
1688 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
1689 mask |= IXGBE_EIMS_GPI_SDP1;
1690 if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1691 mask |= IXGBE_EIMS_ECC;
1692 mask |= IXGBE_EIMS_GPI_SDP1;
1693 mask |= IXGBE_EIMS_GPI_SDP2;
1694 }
1695 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
1696 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
1697 mask |= IXGBE_EIMS_FLOW_DIR;
1698
1699 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1700 ixgbe_irq_enable_queues(adapter, ~0);
1701 IXGBE_WRITE_FLUSH(&adapter->hw);
1702 }
1703
1704 /**
1705 * ixgbe_intr - legacy mode Interrupt Handler
1706 * @irq: interrupt number
1707 * @data: pointer to a network interface device structure
1708 **/
1709 static irqreturn_t ixgbe_intr(int irq, void *data)
1710 {
1711 struct net_device *netdev = data;
1712 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1713 struct ixgbe_hw *hw = &adapter->hw;
1714 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1715 u32 eicr;
1716
1717 /*
1718 * Workaround for silicon errata. Mask the interrupts
1719 * before the read of EICR.
1720 */
1721 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
1722
1723 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
1724 * therefore no explict interrupt disable is necessary */
1725 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
1726 if (!eicr) {
1727 /* shared interrupt alert!
1728 * make sure interrupts are enabled because the read will
1729 * have disabled interrupts due to EIAM */
1730 ixgbe_irq_enable(adapter);
1731 return IRQ_NONE; /* Not our interrupt */
1732 }
1733
1734 if (eicr & IXGBE_EICR_LSC)
1735 ixgbe_check_lsc(adapter);
1736
1737 if (hw->mac.type == ixgbe_mac_82599EB)
1738 ixgbe_check_sfp_event(adapter, eicr);
1739
1740 ixgbe_check_fan_failure(adapter, eicr);
1741
1742 if (napi_schedule_prep(&(q_vector->napi))) {
1743 adapter->tx_ring[0].total_packets = 0;
1744 adapter->tx_ring[0].total_bytes = 0;
1745 adapter->rx_ring[0].total_packets = 0;
1746 adapter->rx_ring[0].total_bytes = 0;
1747 /* would disable interrupts here but EIAM disabled it */
1748 __napi_schedule(&(q_vector->napi));
1749 }
1750
1751 return IRQ_HANDLED;
1752 }
1753
1754 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
1755 {
1756 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1757
1758 for (i = 0; i < q_vectors; i++) {
1759 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
1760 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
1761 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
1762 q_vector->rxr_count = 0;
1763 q_vector->txr_count = 0;
1764 }
1765 }
1766
1767 /**
1768 * ixgbe_request_irq - initialize interrupts
1769 * @adapter: board private structure
1770 *
1771 * Attempts to configure interrupts using the best available
1772 * capabilities of the hardware and kernel.
1773 **/
1774 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
1775 {
1776 struct net_device *netdev = adapter->netdev;
1777 int err;
1778
1779 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1780 err = ixgbe_request_msix_irqs(adapter);
1781 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
1782 err = request_irq(adapter->pdev->irq, &ixgbe_intr, 0,
1783 netdev->name, netdev);
1784 } else {
1785 err = request_irq(adapter->pdev->irq, &ixgbe_intr, IRQF_SHARED,
1786 netdev->name, netdev);
1787 }
1788
1789 if (err)
1790 DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err);
1791
1792 return err;
1793 }
1794
1795 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
1796 {
1797 struct net_device *netdev = adapter->netdev;
1798
1799 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1800 int i, q_vectors;
1801
1802 q_vectors = adapter->num_msix_vectors;
1803
1804 i = q_vectors - 1;
1805 free_irq(adapter->msix_entries[i].vector, netdev);
1806
1807 i--;
1808 for (; i >= 0; i--) {
1809 free_irq(adapter->msix_entries[i].vector,
1810 adapter->q_vector[i]);
1811 }
1812
1813 ixgbe_reset_q_vectors(adapter);
1814 } else {
1815 free_irq(adapter->pdev->irq, netdev);
1816 }
1817 }
1818
1819 /**
1820 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
1821 * @adapter: board private structure
1822 **/
1823 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
1824 {
1825 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1826 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
1827 } else {
1828 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
1829 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
1830 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
1831 }
1832 IXGBE_WRITE_FLUSH(&adapter->hw);
1833 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1834 int i;
1835 for (i = 0; i < adapter->num_msix_vectors; i++)
1836 synchronize_irq(adapter->msix_entries[i].vector);
1837 } else {
1838 synchronize_irq(adapter->pdev->irq);
1839 }
1840 }
1841
1842 /**
1843 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
1844 *
1845 **/
1846 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
1847 {
1848 struct ixgbe_hw *hw = &adapter->hw;
1849
1850 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
1851 EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr_param));
1852
1853 ixgbe_set_ivar(adapter, 0, 0, 0);
1854 ixgbe_set_ivar(adapter, 1, 0, 0);
1855
1856 map_vector_to_rxq(adapter, 0, 0);
1857 map_vector_to_txq(adapter, 0, 0);
1858
1859 DPRINTK(HW, INFO, "Legacy interrupt IVAR setup done\n");
1860 }
1861
1862 /**
1863 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
1864 * @adapter: board private structure
1865 *
1866 * Configure the Tx unit of the MAC after a reset.
1867 **/
1868 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
1869 {
1870 u64 tdba;
1871 struct ixgbe_hw *hw = &adapter->hw;
1872 u32 i, j, tdlen, txctrl;
1873
1874 /* Setup the HW Tx Head and Tail descriptor pointers */
1875 for (i = 0; i < adapter->num_tx_queues; i++) {
1876 struct ixgbe_ring *ring = &adapter->tx_ring[i];
1877 j = ring->reg_idx;
1878 tdba = ring->dma;
1879 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1880 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(j),
1881 (tdba & DMA_BIT_MASK(32)));
1882 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(j), (tdba >> 32));
1883 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(j), tdlen);
1884 IXGBE_WRITE_REG(hw, IXGBE_TDH(j), 0);
1885 IXGBE_WRITE_REG(hw, IXGBE_TDT(j), 0);
1886 adapter->tx_ring[i].head = IXGBE_TDH(j);
1887 adapter->tx_ring[i].tail = IXGBE_TDT(j);
1888 /*
1889 * Disable Tx Head Writeback RO bit, since this hoses
1890 * bookkeeping if things aren't delivered in order.
1891 */
1892 switch (hw->mac.type) {
1893 case ixgbe_mac_82598EB:
1894 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(j));
1895 break;
1896 case ixgbe_mac_82599EB:
1897 default:
1898 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(j));
1899 break;
1900 }
1901 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1902 switch (hw->mac.type) {
1903 case ixgbe_mac_82598EB:
1904 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(j), txctrl);
1905 break;
1906 case ixgbe_mac_82599EB:
1907 default:
1908 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(j), txctrl);
1909 break;
1910 }
1911 }
1912 if (hw->mac.type == ixgbe_mac_82599EB) {
1913 /* We enable 8 traffic classes, DCB only */
1914 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
1915 IXGBE_WRITE_REG(hw, IXGBE_MTQC, (IXGBE_MTQC_RT_ENA |
1916 IXGBE_MTQC_8TC_8TQ));
1917 }
1918 }
1919
1920 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1921
1922 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
1923 struct ixgbe_ring *rx_ring)
1924 {
1925 u32 srrctl;
1926 int index;
1927 struct ixgbe_ring_feature *feature = adapter->ring_feature;
1928
1929 index = rx_ring->reg_idx;
1930 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1931 unsigned long mask;
1932 mask = (unsigned long) feature[RING_F_RSS].mask;
1933 index = index & mask;
1934 }
1935 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
1936
1937 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
1938 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
1939
1940 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
1941 IXGBE_SRRCTL_BSIZEHDR_MASK;
1942
1943 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1944 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
1945 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1946 #else
1947 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1948 #endif
1949 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1950 } else {
1951 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
1952 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1953 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1954 }
1955
1956 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
1957 }
1958
1959 static u32 ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
1960 {
1961 u32 mrqc = 0;
1962 int mask;
1963
1964 if (!(adapter->hw.mac.type == ixgbe_mac_82599EB))
1965 return mrqc;
1966
1967 mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
1968 #ifdef CONFIG_IXGBE_DCB
1969 | IXGBE_FLAG_DCB_ENABLED
1970 #endif
1971 );
1972
1973 switch (mask) {
1974 case (IXGBE_FLAG_RSS_ENABLED):
1975 mrqc = IXGBE_MRQC_RSSEN;
1976 break;
1977 #ifdef CONFIG_IXGBE_DCB
1978 case (IXGBE_FLAG_DCB_ENABLED):
1979 mrqc = IXGBE_MRQC_RT8TCEN;
1980 break;
1981 #endif /* CONFIG_IXGBE_DCB */
1982 default:
1983 break;
1984 }
1985
1986 return mrqc;
1987 }
1988
1989 /**
1990 * ixgbe_configure_rscctl - enable RSC for the indicated ring
1991 * @adapter: address of board private structure
1992 * @index: index of ring to set
1993 * @rx_buf_len: rx buffer length
1994 **/
1995 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter, int index,
1996 int rx_buf_len)
1997 {
1998 struct ixgbe_ring *rx_ring;
1999 struct ixgbe_hw *hw = &adapter->hw;
2000 int j;
2001 u32 rscctrl;
2002
2003 rx_ring = &adapter->rx_ring[index];
2004 j = rx_ring->reg_idx;
2005 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(j));
2006 rscctrl |= IXGBE_RSCCTL_RSCEN;
2007 /*
2008 * we must limit the number of descriptors so that the
2009 * total size of max desc * buf_len is not greater
2010 * than 65535
2011 */
2012 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2013 #if (MAX_SKB_FRAGS > 16)
2014 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2015 #elif (MAX_SKB_FRAGS > 8)
2016 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2017 #elif (MAX_SKB_FRAGS > 4)
2018 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2019 #else
2020 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2021 #endif
2022 } else {
2023 if (rx_buf_len < IXGBE_RXBUFFER_4096)
2024 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2025 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
2026 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2027 else
2028 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2029 }
2030 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(j), rscctrl);
2031 }
2032
2033 /**
2034 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
2035 * @adapter: board private structure
2036 *
2037 * Configure the Rx unit of the MAC after a reset.
2038 **/
2039 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
2040 {
2041 u64 rdba;
2042 struct ixgbe_hw *hw = &adapter->hw;
2043 struct ixgbe_ring *rx_ring;
2044 struct net_device *netdev = adapter->netdev;
2045 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2046 int i, j;
2047 u32 rdlen, rxctrl, rxcsum;
2048 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2049 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2050 0x6A3E67EA, 0x14364D17, 0x3BED200D};
2051 u32 fctrl, hlreg0;
2052 u32 reta = 0, mrqc = 0;
2053 u32 rdrxctl;
2054 int rx_buf_len;
2055
2056 /* Decide whether to use packet split mode or not */
2057 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
2058
2059 /* Set the RX buffer length according to the mode */
2060 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
2061 rx_buf_len = IXGBE_RX_HDR_SIZE;
2062 if (hw->mac.type == ixgbe_mac_82599EB) {
2063 /* PSRTYPE must be initialized in 82599 */
2064 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
2065 IXGBE_PSRTYPE_UDPHDR |
2066 IXGBE_PSRTYPE_IPV4HDR |
2067 IXGBE_PSRTYPE_IPV6HDR |
2068 IXGBE_PSRTYPE_L2HDR;
2069 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(0), psrtype);
2070 }
2071 } else {
2072 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
2073 (netdev->mtu <= ETH_DATA_LEN))
2074 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
2075 else
2076 rx_buf_len = ALIGN(max_frame, 1024);
2077 }
2078
2079 fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
2080 fctrl |= IXGBE_FCTRL_BAM;
2081 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
2082 fctrl |= IXGBE_FCTRL_PMCF;
2083 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
2084
2085 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
2086 if (adapter->netdev->mtu <= ETH_DATA_LEN)
2087 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
2088 else
2089 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2090 #ifdef IXGBE_FCOE
2091 if (netdev->features & NETIF_F_FCOE_MTU)
2092 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2093 #endif
2094 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
2095
2096 rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
2097 /* disable receives while setting up the descriptors */
2098 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2099 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2100
2101 /*
2102 * Setup the HW Rx Head and Tail Descriptor Pointers and
2103 * the Base and Length of the Rx Descriptor Ring
2104 */
2105 for (i = 0; i < adapter->num_rx_queues; i++) {
2106 rx_ring = &adapter->rx_ring[i];
2107 rdba = rx_ring->dma;
2108 j = rx_ring->reg_idx;
2109 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(j), (rdba & DMA_BIT_MASK(32)));
2110 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(j), (rdba >> 32));
2111 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(j), rdlen);
2112 IXGBE_WRITE_REG(hw, IXGBE_RDH(j), 0);
2113 IXGBE_WRITE_REG(hw, IXGBE_RDT(j), 0);
2114 rx_ring->head = IXGBE_RDH(j);
2115 rx_ring->tail = IXGBE_RDT(j);
2116 rx_ring->rx_buf_len = rx_buf_len;
2117
2118 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
2119 rx_ring->flags |= IXGBE_RING_RX_PS_ENABLED;
2120 else
2121 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2122
2123 #ifdef IXGBE_FCOE
2124 if (netdev->features & NETIF_F_FCOE_MTU) {
2125 struct ixgbe_ring_feature *f;
2126 f = &adapter->ring_feature[RING_F_FCOE];
2127 if ((i >= f->mask) && (i < f->mask + f->indices)) {
2128 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2129 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
2130 rx_ring->rx_buf_len =
2131 IXGBE_FCOE_JUMBO_FRAME_SIZE;
2132 }
2133 }
2134
2135 #endif /* IXGBE_FCOE */
2136 ixgbe_configure_srrctl(adapter, rx_ring);
2137 }
2138
2139 if (hw->mac.type == ixgbe_mac_82598EB) {
2140 /*
2141 * For VMDq support of different descriptor types or
2142 * buffer sizes through the use of multiple SRRCTL
2143 * registers, RDRXCTL.MVMEN must be set to 1
2144 *
2145 * also, the manual doesn't mention it clearly but DCA hints
2146 * will only use queue 0's tags unless this bit is set. Side
2147 * effects of setting this bit are only that SRRCTL must be
2148 * fully programmed [0..15]
2149 */
2150 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2151 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
2152 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2153 }
2154
2155 /* Program MRQC for the distribution of queues */
2156 mrqc = ixgbe_setup_mrqc(adapter);
2157
2158 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
2159 /* Fill out redirection table */
2160 for (i = 0, j = 0; i < 128; i++, j++) {
2161 if (j == adapter->ring_feature[RING_F_RSS].indices)
2162 j = 0;
2163 /* reta = 4-byte sliding window of
2164 * 0x00..(indices-1)(indices-1)00..etc. */
2165 reta = (reta << 8) | (j * 0x11);
2166 if ((i & 3) == 3)
2167 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2168 }
2169
2170 /* Fill out hash function seeds */
2171 for (i = 0; i < 10; i++)
2172 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2173
2174 if (hw->mac.type == ixgbe_mac_82598EB)
2175 mrqc |= IXGBE_MRQC_RSSEN;
2176 /* Perform hash on these packet types */
2177 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2178 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2179 | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
2180 | IXGBE_MRQC_RSS_FIELD_IPV6
2181 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
2182 | IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
2183 }
2184 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2185
2186 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2187
2188 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED ||
2189 adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
2190 /* Disable indicating checksum in descriptor, enables
2191 * RSS hash */
2192 rxcsum |= IXGBE_RXCSUM_PCSD;
2193 }
2194 if (!(rxcsum & IXGBE_RXCSUM_PCSD)) {
2195 /* Enable IPv4 payload checksum for UDP fragments
2196 * if PCSD is not set */
2197 rxcsum |= IXGBE_RXCSUM_IPPCSE;
2198 }
2199
2200 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2201
2202 if (hw->mac.type == ixgbe_mac_82599EB) {
2203 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2204 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
2205 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
2206 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2207 }
2208
2209 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
2210 /* Enable 82599 HW-RSC */
2211 for (i = 0; i < adapter->num_rx_queues; i++)
2212 ixgbe_configure_rscctl(adapter, i, rx_buf_len);
2213
2214 /* Disable RSC for ACK packets */
2215 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
2216 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
2217 }
2218 }
2219
2220 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2221 {
2222 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2223 struct ixgbe_hw *hw = &adapter->hw;
2224
2225 /* add VID to filter table */
2226 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, true);
2227 }
2228
2229 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2230 {
2231 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2232 struct ixgbe_hw *hw = &adapter->hw;
2233
2234 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2235 ixgbe_irq_disable(adapter);
2236
2237 vlan_group_set_device(adapter->vlgrp, vid, NULL);
2238
2239 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2240 ixgbe_irq_enable(adapter);
2241
2242 /* remove VID from filter table */
2243 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, false);
2244 }
2245
2246 static void ixgbe_vlan_rx_register(struct net_device *netdev,
2247 struct vlan_group *grp)
2248 {
2249 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2250 u32 ctrl;
2251 int i, j;
2252
2253 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2254 ixgbe_irq_disable(adapter);
2255 adapter->vlgrp = grp;
2256
2257 /*
2258 * For a DCB driver, always enable VLAN tag stripping so we can
2259 * still receive traffic from a DCB-enabled host even if we're
2260 * not in DCB mode.
2261 */
2262 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
2263 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2264 ctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2265 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
2266 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
2267 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
2268 ctrl |= IXGBE_VLNCTRL_VFE;
2269 /* enable VLAN tag insert/strip */
2270 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
2271 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
2272 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
2273 for (i = 0; i < adapter->num_rx_queues; i++) {
2274 j = adapter->rx_ring[i].reg_idx;
2275 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXDCTL(j));
2276 ctrl |= IXGBE_RXDCTL_VME;
2277 IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXDCTL(j), ctrl);
2278 }
2279 }
2280 ixgbe_vlan_rx_add_vid(netdev, 0);
2281
2282 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2283 ixgbe_irq_enable(adapter);
2284 }
2285
2286 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
2287 {
2288 ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2289
2290 if (adapter->vlgrp) {
2291 u16 vid;
2292 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2293 if (!vlan_group_get_device(adapter->vlgrp, vid))
2294 continue;
2295 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
2296 }
2297 }
2298 }
2299
2300 static u8 *ixgbe_addr_list_itr(struct ixgbe_hw *hw, u8 **mc_addr_ptr, u32 *vmdq)
2301 {
2302 struct dev_mc_list *mc_ptr;
2303 u8 *addr = *mc_addr_ptr;
2304 *vmdq = 0;
2305
2306 mc_ptr = container_of(addr, struct dev_mc_list, dmi_addr[0]);
2307 if (mc_ptr->next)
2308 *mc_addr_ptr = mc_ptr->next->dmi_addr;
2309 else
2310 *mc_addr_ptr = NULL;
2311
2312 return addr;
2313 }
2314
2315 /**
2316 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
2317 * @netdev: network interface device structure
2318 *
2319 * The set_rx_method entry point is called whenever the unicast/multicast
2320 * address list or the network interface flags are updated. This routine is
2321 * responsible for configuring the hardware for proper unicast, multicast and
2322 * promiscuous mode.
2323 **/
2324 static void ixgbe_set_rx_mode(struct net_device *netdev)
2325 {
2326 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2327 struct ixgbe_hw *hw = &adapter->hw;
2328 u32 fctrl, vlnctrl;
2329 u8 *addr_list = NULL;
2330 int addr_count = 0;
2331
2332 /* Check for Promiscuous and All Multicast modes */
2333
2334 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
2335 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2336
2337 if (netdev->flags & IFF_PROMISC) {
2338 hw->addr_ctrl.user_set_promisc = 1;
2339 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2340 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
2341 } else {
2342 if (netdev->flags & IFF_ALLMULTI) {
2343 fctrl |= IXGBE_FCTRL_MPE;
2344 fctrl &= ~IXGBE_FCTRL_UPE;
2345 } else {
2346 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2347 }
2348 vlnctrl |= IXGBE_VLNCTRL_VFE;
2349 hw->addr_ctrl.user_set_promisc = 0;
2350 }
2351
2352 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
2353 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2354
2355 /* reprogram secondary unicast list */
2356 hw->mac.ops.update_uc_addr_list(hw, &netdev->uc.list);
2357
2358 /* reprogram multicast list */
2359 addr_count = netdev->mc_count;
2360 if (addr_count)
2361 addr_list = netdev->mc_list->dmi_addr;
2362 hw->mac.ops.update_mc_addr_list(hw, addr_list, addr_count,
2363 ixgbe_addr_list_itr);
2364 }
2365
2366 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
2367 {
2368 int q_idx;
2369 struct ixgbe_q_vector *q_vector;
2370 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2371
2372 /* legacy and MSI only use one vector */
2373 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2374 q_vectors = 1;
2375
2376 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2377 struct napi_struct *napi;
2378 q_vector = adapter->q_vector[q_idx];
2379 napi = &q_vector->napi;
2380 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2381 if (!q_vector->rxr_count || !q_vector->txr_count) {
2382 if (q_vector->txr_count == 1)
2383 napi->poll = &ixgbe_clean_txonly;
2384 else if (q_vector->rxr_count == 1)
2385 napi->poll = &ixgbe_clean_rxonly;
2386 }
2387 }
2388
2389 napi_enable(napi);
2390 }
2391 }
2392
2393 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
2394 {
2395 int q_idx;
2396 struct ixgbe_q_vector *q_vector;
2397 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2398
2399 /* legacy and MSI only use one vector */
2400 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2401 q_vectors = 1;
2402
2403 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2404 q_vector = adapter->q_vector[q_idx];
2405 napi_disable(&q_vector->napi);
2406 }
2407 }
2408
2409 #ifdef CONFIG_IXGBE_DCB
2410 /*
2411 * ixgbe_configure_dcb - Configure DCB hardware
2412 * @adapter: ixgbe adapter struct
2413 *
2414 * This is called by the driver on open to configure the DCB hardware.
2415 * This is also called by the gennetlink interface when reconfiguring
2416 * the DCB state.
2417 */
2418 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
2419 {
2420 struct ixgbe_hw *hw = &adapter->hw;
2421 u32 txdctl, vlnctrl;
2422 int i, j;
2423
2424 ixgbe_dcb_check_config(&adapter->dcb_cfg);
2425 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_TX_CONFIG);
2426 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_RX_CONFIG);
2427
2428 /* reconfigure the hardware */
2429 ixgbe_dcb_hw_config(&adapter->hw, &adapter->dcb_cfg);
2430
2431 for (i = 0; i < adapter->num_tx_queues; i++) {
2432 j = adapter->tx_ring[i].reg_idx;
2433 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2434 /* PThresh workaround for Tx hang with DFP enabled. */
2435 txdctl |= 32;
2436 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2437 }
2438 /* Enable VLAN tag insert/strip */
2439 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2440 if (hw->mac.type == ixgbe_mac_82598EB) {
2441 vlnctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2442 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2443 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2444 } else if (hw->mac.type == ixgbe_mac_82599EB) {
2445 vlnctrl |= IXGBE_VLNCTRL_VFE;
2446 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2447 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2448 for (i = 0; i < adapter->num_rx_queues; i++) {
2449 j = adapter->rx_ring[i].reg_idx;
2450 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2451 vlnctrl |= IXGBE_RXDCTL_VME;
2452 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
2453 }
2454 }
2455 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
2456 }
2457
2458 #endif
2459 static void ixgbe_configure(struct ixgbe_adapter *adapter)
2460 {
2461 struct net_device *netdev = adapter->netdev;
2462 struct ixgbe_hw *hw = &adapter->hw;
2463 int i;
2464
2465 ixgbe_set_rx_mode(netdev);
2466
2467 ixgbe_restore_vlan(adapter);
2468 #ifdef CONFIG_IXGBE_DCB
2469 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2470 netif_set_gso_max_size(netdev, 32768);
2471 ixgbe_configure_dcb(adapter);
2472 } else {
2473 netif_set_gso_max_size(netdev, 65536);
2474 }
2475 #else
2476 netif_set_gso_max_size(netdev, 65536);
2477 #endif
2478
2479 #ifdef IXGBE_FCOE
2480 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
2481 ixgbe_configure_fcoe(adapter);
2482
2483 #endif /* IXGBE_FCOE */
2484 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2485 for (i = 0; i < adapter->num_tx_queues; i++)
2486 adapter->tx_ring[i].atr_sample_rate =
2487 adapter->atr_sample_rate;
2488 ixgbe_init_fdir_signature_82599(hw, adapter->fdir_pballoc);
2489 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
2490 ixgbe_init_fdir_perfect_82599(hw, adapter->fdir_pballoc);
2491 }
2492
2493 ixgbe_configure_tx(adapter);
2494 ixgbe_configure_rx(adapter);
2495 for (i = 0; i < adapter->num_rx_queues; i++)
2496 ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i],
2497 (adapter->rx_ring[i].count - 1));
2498 }
2499
2500 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
2501 {
2502 switch (hw->phy.type) {
2503 case ixgbe_phy_sfp_avago:
2504 case ixgbe_phy_sfp_ftl:
2505 case ixgbe_phy_sfp_intel:
2506 case ixgbe_phy_sfp_unknown:
2507 case ixgbe_phy_tw_tyco:
2508 case ixgbe_phy_tw_unknown:
2509 return true;
2510 default:
2511 return false;
2512 }
2513 }
2514
2515 /**
2516 * ixgbe_sfp_link_config - set up SFP+ link
2517 * @adapter: pointer to private adapter struct
2518 **/
2519 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
2520 {
2521 struct ixgbe_hw *hw = &adapter->hw;
2522
2523 if (hw->phy.multispeed_fiber) {
2524 /*
2525 * In multispeed fiber setups, the device may not have
2526 * had a physical connection when the driver loaded.
2527 * If that's the case, the initial link configuration
2528 * couldn't get the MAC into 10G or 1G mode, so we'll
2529 * never have a link status change interrupt fire.
2530 * We need to try and force an autonegotiation
2531 * session, then bring up link.
2532 */
2533 hw->mac.ops.setup_sfp(hw);
2534 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
2535 schedule_work(&adapter->multispeed_fiber_task);
2536 } else {
2537 /*
2538 * Direct Attach Cu and non-multispeed fiber modules
2539 * still need to be configured properly prior to
2540 * attempting link.
2541 */
2542 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_MOD_TASK))
2543 schedule_work(&adapter->sfp_config_module_task);
2544 }
2545 }
2546
2547 /**
2548 * ixgbe_non_sfp_link_config - set up non-SFP+ link
2549 * @hw: pointer to private hardware struct
2550 *
2551 * Returns 0 on success, negative on failure
2552 **/
2553 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
2554 {
2555 u32 autoneg;
2556 bool negotiation, link_up = false;
2557 u32 ret = IXGBE_ERR_LINK_SETUP;
2558
2559 if (hw->mac.ops.check_link)
2560 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
2561
2562 if (ret)
2563 goto link_cfg_out;
2564
2565 if (hw->mac.ops.get_link_capabilities)
2566 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
2567 if (ret)
2568 goto link_cfg_out;
2569
2570 if (hw->mac.ops.setup_link)
2571 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
2572 link_cfg_out:
2573 return ret;
2574 }
2575
2576 #define IXGBE_MAX_RX_DESC_POLL 10
2577 static inline void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
2578 int rxr)
2579 {
2580 int j = adapter->rx_ring[rxr].reg_idx;
2581 int k;
2582
2583 for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) {
2584 if (IXGBE_READ_REG(&adapter->hw,
2585 IXGBE_RXDCTL(j)) & IXGBE_RXDCTL_ENABLE)
2586 break;
2587 else
2588 msleep(1);
2589 }
2590 if (k >= IXGBE_MAX_RX_DESC_POLL) {
2591 DPRINTK(DRV, ERR, "RXDCTL.ENABLE on Rx queue %d "
2592 "not set within the polling period\n", rxr);
2593 }
2594 ixgbe_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr],
2595 (adapter->rx_ring[rxr].count - 1));
2596 }
2597
2598 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
2599 {
2600 struct net_device *netdev = adapter->netdev;
2601 struct ixgbe_hw *hw = &adapter->hw;
2602 int i, j = 0;
2603 int num_rx_rings = adapter->num_rx_queues;
2604 int err;
2605 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2606 u32 txdctl, rxdctl, mhadd;
2607 u32 dmatxctl;
2608 u32 gpie;
2609
2610 ixgbe_get_hw_control(adapter);
2611
2612 if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) ||
2613 (adapter->flags & IXGBE_FLAG_MSI_ENABLED)) {
2614 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2615 gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
2616 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
2617 } else {
2618 /* MSI only */
2619 gpie = 0;
2620 }
2621 /* XXX: to interrupt immediately for EICS writes, enable this */
2622 /* gpie |= IXGBE_GPIE_EIMEN; */
2623 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2624 }
2625
2626 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
2627 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
2628 * specifically only auto mask tx and rx interrupts */
2629 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
2630 }
2631
2632 /* Enable fan failure interrupt if media type is copper */
2633 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2634 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2635 gpie |= IXGBE_SDP1_GPIEN;
2636 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2637 }
2638
2639 if (hw->mac.type == ixgbe_mac_82599EB) {
2640 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2641 gpie |= IXGBE_SDP1_GPIEN;
2642 gpie |= IXGBE_SDP2_GPIEN;
2643 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2644 }
2645
2646 #ifdef IXGBE_FCOE
2647 /* adjust max frame to be able to do baby jumbo for FCoE */
2648 if ((netdev->features & NETIF_F_FCOE_MTU) &&
2649 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
2650 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
2651
2652 #endif /* IXGBE_FCOE */
2653 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
2654 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
2655 mhadd &= ~IXGBE_MHADD_MFS_MASK;
2656 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
2657
2658 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
2659 }
2660
2661 for (i = 0; i < adapter->num_tx_queues; i++) {
2662 j = adapter->tx_ring[i].reg_idx;
2663 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2664 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
2665 txdctl |= (8 << 16);
2666 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2667 }
2668
2669 if (hw->mac.type == ixgbe_mac_82599EB) {
2670 /* DMATXCTL.EN must be set after all Tx queue config is done */
2671 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2672 dmatxctl |= IXGBE_DMATXCTL_TE;
2673 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2674 }
2675 for (i = 0; i < adapter->num_tx_queues; i++) {
2676 j = adapter->tx_ring[i].reg_idx;
2677 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2678 txdctl |= IXGBE_TXDCTL_ENABLE;
2679 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2680 }
2681
2682 for (i = 0; i < num_rx_rings; i++) {
2683 j = adapter->rx_ring[i].reg_idx;
2684 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2685 /* enable PTHRESH=32 descriptors (half the internal cache)
2686 * and HTHRESH=0 descriptors (to minimize latency on fetch),
2687 * this also removes a pesky rx_no_buffer_count increment */
2688 rxdctl |= 0x0020;
2689 rxdctl |= IXGBE_RXDCTL_ENABLE;
2690 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), rxdctl);
2691 if (hw->mac.type == ixgbe_mac_82599EB)
2692 ixgbe_rx_desc_queue_enable(adapter, i);
2693 }
2694 /* enable all receives */
2695 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2696 if (hw->mac.type == ixgbe_mac_82598EB)
2697 rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
2698 else
2699 rxdctl |= IXGBE_RXCTRL_RXEN;
2700 hw->mac.ops.enable_rx_dma(hw, rxdctl);
2701
2702 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2703 ixgbe_configure_msix(adapter);
2704 else
2705 ixgbe_configure_msi_and_legacy(adapter);
2706
2707 clear_bit(__IXGBE_DOWN, &adapter->state);
2708 ixgbe_napi_enable_all(adapter);
2709
2710 /* clear any pending interrupts, may auto mask */
2711 IXGBE_READ_REG(hw, IXGBE_EICR);
2712
2713 ixgbe_irq_enable(adapter);
2714
2715 /*
2716 * If this adapter has a fan, check to see if we had a failure
2717 * before we enabled the interrupt.
2718 */
2719 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2720 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
2721 if (esdp & IXGBE_ESDP_SDP1)
2722 DPRINTK(DRV, CRIT,
2723 "Fan has stopped, replace the adapter\n");
2724 }
2725
2726 /*
2727 * For hot-pluggable SFP+ devices, a new SFP+ module may have
2728 * arrived before interrupts were enabled but after probe. Such
2729 * devices wouldn't have their type identified yet. We need to
2730 * kick off the SFP+ module setup first, then try to bring up link.
2731 * If we're not hot-pluggable SFP+, we just need to configure link
2732 * and bring it up.
2733 */
2734 if (hw->phy.type == ixgbe_phy_unknown) {
2735 err = hw->phy.ops.identify(hw);
2736 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
2737 /*
2738 * Take the device down and schedule the sfp tasklet
2739 * which will unregister_netdev and log it.
2740 */
2741 ixgbe_down(adapter);
2742 schedule_work(&adapter->sfp_config_module_task);
2743 return err;
2744 }
2745 }
2746
2747 if (ixgbe_is_sfp(hw)) {
2748 ixgbe_sfp_link_config(adapter);
2749 } else {
2750 err = ixgbe_non_sfp_link_config(hw);
2751 if (err)
2752 DPRINTK(PROBE, ERR, "link_config FAILED %d\n", err);
2753 }
2754
2755 for (i = 0; i < adapter->num_tx_queues; i++)
2756 set_bit(__IXGBE_FDIR_INIT_DONE,
2757 &(adapter->tx_ring[i].reinit_state));
2758
2759 /* enable transmits */
2760 netif_tx_start_all_queues(netdev);
2761
2762 /* bring the link up in the watchdog, this could race with our first
2763 * link up interrupt but shouldn't be a problem */
2764 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2765 adapter->link_check_timeout = jiffies;
2766 mod_timer(&adapter->watchdog_timer, jiffies);
2767 return 0;
2768 }
2769
2770 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
2771 {
2772 WARN_ON(in_interrupt());
2773 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
2774 msleep(1);
2775 ixgbe_down(adapter);
2776 ixgbe_up(adapter);
2777 clear_bit(__IXGBE_RESETTING, &adapter->state);
2778 }
2779
2780 int ixgbe_up(struct ixgbe_adapter *adapter)
2781 {
2782 /* hardware has been reset, we need to reload some things */
2783 ixgbe_configure(adapter);
2784
2785 return ixgbe_up_complete(adapter);
2786 }
2787
2788 void ixgbe_reset(struct ixgbe_adapter *adapter)
2789 {
2790 struct ixgbe_hw *hw = &adapter->hw;
2791 int err;
2792
2793 err = hw->mac.ops.init_hw(hw);
2794 switch (err) {
2795 case 0:
2796 case IXGBE_ERR_SFP_NOT_PRESENT:
2797 break;
2798 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
2799 dev_err(&adapter->pdev->dev, "master disable timed out\n");
2800 break;
2801 case IXGBE_ERR_EEPROM_VERSION:
2802 /* We are running on a pre-production device, log a warning */
2803 dev_warn(&adapter->pdev->dev, "This device is a pre-production "
2804 "adapter/LOM. Please be aware there may be issues "
2805 "associated with your hardware. If you are "
2806 "experiencing problems please contact your Intel or "
2807 "hardware representative who provided you with this "
2808 "hardware.\n");
2809 break;
2810 default:
2811 dev_err(&adapter->pdev->dev, "Hardware Error: %d\n", err);
2812 }
2813
2814 /* reprogram the RAR[0] in case user changed it. */
2815 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
2816 }
2817
2818 /**
2819 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
2820 * @adapter: board private structure
2821 * @rx_ring: ring to free buffers from
2822 **/
2823 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
2824 struct ixgbe_ring *rx_ring)
2825 {
2826 struct pci_dev *pdev = adapter->pdev;
2827 unsigned long size;
2828 unsigned int i;
2829
2830 /* Free all the Rx ring sk_buffs */
2831
2832 for (i = 0; i < rx_ring->count; i++) {
2833 struct ixgbe_rx_buffer *rx_buffer_info;
2834
2835 rx_buffer_info = &rx_ring->rx_buffer_info[i];
2836 if (rx_buffer_info->dma) {
2837 pci_unmap_single(pdev, rx_buffer_info->dma,
2838 rx_ring->rx_buf_len,
2839 PCI_DMA_FROMDEVICE);
2840 rx_buffer_info->dma = 0;
2841 }
2842 if (rx_buffer_info->skb) {
2843 struct sk_buff *skb = rx_buffer_info->skb;
2844 rx_buffer_info->skb = NULL;
2845 do {
2846 struct sk_buff *this = skb;
2847 skb = skb->prev;
2848 dev_kfree_skb(this);
2849 } while (skb);
2850 }
2851 if (!rx_buffer_info->page)
2852 continue;
2853 if (rx_buffer_info->page_dma) {
2854 pci_unmap_page(pdev, rx_buffer_info->page_dma,
2855 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
2856 rx_buffer_info->page_dma = 0;
2857 }
2858 put_page(rx_buffer_info->page);
2859 rx_buffer_info->page = NULL;
2860 rx_buffer_info->page_offset = 0;
2861 }
2862
2863 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
2864 memset(rx_ring->rx_buffer_info, 0, size);
2865
2866 /* Zero out the descriptor ring */
2867 memset(rx_ring->desc, 0, rx_ring->size);
2868
2869 rx_ring->next_to_clean = 0;
2870 rx_ring->next_to_use = 0;
2871
2872 if (rx_ring->head)
2873 writel(0, adapter->hw.hw_addr + rx_ring->head);
2874 if (rx_ring->tail)
2875 writel(0, adapter->hw.hw_addr + rx_ring->tail);
2876 }
2877
2878 /**
2879 * ixgbe_clean_tx_ring - Free Tx Buffers
2880 * @adapter: board private structure
2881 * @tx_ring: ring to be cleaned
2882 **/
2883 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
2884 struct ixgbe_ring *tx_ring)
2885 {
2886 struct ixgbe_tx_buffer *tx_buffer_info;
2887 unsigned long size;
2888 unsigned int i;
2889
2890 /* Free all the Tx ring sk_buffs */
2891
2892 for (i = 0; i < tx_ring->count; i++) {
2893 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2894 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
2895 }
2896
2897 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
2898 memset(tx_ring->tx_buffer_info, 0, size);
2899
2900 /* Zero out the descriptor ring */
2901 memset(tx_ring->desc, 0, tx_ring->size);
2902
2903 tx_ring->next_to_use = 0;
2904 tx_ring->next_to_clean = 0;
2905
2906 if (tx_ring->head)
2907 writel(0, adapter->hw.hw_addr + tx_ring->head);
2908 if (tx_ring->tail)
2909 writel(0, adapter->hw.hw_addr + tx_ring->tail);
2910 }
2911
2912 /**
2913 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
2914 * @adapter: board private structure
2915 **/
2916 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
2917 {
2918 int i;
2919
2920 for (i = 0; i < adapter->num_rx_queues; i++)
2921 ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2922 }
2923
2924 /**
2925 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
2926 * @adapter: board private structure
2927 **/
2928 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
2929 {
2930 int i;
2931
2932 for (i = 0; i < adapter->num_tx_queues; i++)
2933 ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2934 }
2935
2936 void ixgbe_down(struct ixgbe_adapter *adapter)
2937 {
2938 struct net_device *netdev = adapter->netdev;
2939 struct ixgbe_hw *hw = &adapter->hw;
2940 u32 rxctrl;
2941 u32 txdctl;
2942 int i, j;
2943
2944 /* signal that we are down to the interrupt handler */
2945 set_bit(__IXGBE_DOWN, &adapter->state);
2946
2947 /* disable receives */
2948 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2949 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2950
2951 netif_tx_disable(netdev);
2952
2953 IXGBE_WRITE_FLUSH(hw);
2954 msleep(10);
2955
2956 netif_tx_stop_all_queues(netdev);
2957
2958 ixgbe_irq_disable(adapter);
2959
2960 ixgbe_napi_disable_all(adapter);
2961
2962 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
2963 del_timer_sync(&adapter->sfp_timer);
2964 del_timer_sync(&adapter->watchdog_timer);
2965 cancel_work_sync(&adapter->watchdog_task);
2966
2967 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
2968 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
2969 cancel_work_sync(&adapter->fdir_reinit_task);
2970
2971 /* disable transmits in the hardware now that interrupts are off */
2972 for (i = 0; i < adapter->num_tx_queues; i++) {
2973 j = adapter->tx_ring[i].reg_idx;
2974 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2975 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
2976 (txdctl & ~IXGBE_TXDCTL_ENABLE));
2977 }
2978 /* Disable the Tx DMA engine on 82599 */
2979 if (hw->mac.type == ixgbe_mac_82599EB)
2980 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
2981 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
2982 ~IXGBE_DMATXCTL_TE));
2983
2984 netif_carrier_off(netdev);
2985
2986 if (!pci_channel_offline(adapter->pdev))
2987 ixgbe_reset(adapter);
2988 ixgbe_clean_all_tx_rings(adapter);
2989 ixgbe_clean_all_rx_rings(adapter);
2990
2991 #ifdef CONFIG_IXGBE_DCA
2992 /* since we reset the hardware DCA settings were cleared */
2993 ixgbe_setup_dca(adapter);
2994 #endif
2995 }
2996
2997 /**
2998 * ixgbe_poll - NAPI Rx polling callback
2999 * @napi: structure for representing this polling device
3000 * @budget: how many packets driver is allowed to clean
3001 *
3002 * This function is used for legacy and MSI, NAPI mode
3003 **/
3004 static int ixgbe_poll(struct napi_struct *napi, int budget)
3005 {
3006 struct ixgbe_q_vector *q_vector =
3007 container_of(napi, struct ixgbe_q_vector, napi);
3008 struct ixgbe_adapter *adapter = q_vector->adapter;
3009 int tx_clean_complete, work_done = 0;
3010
3011 #ifdef CONFIG_IXGBE_DCA
3012 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
3013 ixgbe_update_tx_dca(adapter, adapter->tx_ring);
3014 ixgbe_update_rx_dca(adapter, adapter->rx_ring);
3015 }
3016 #endif
3017
3018 tx_clean_complete = ixgbe_clean_tx_irq(q_vector, adapter->tx_ring);
3019 ixgbe_clean_rx_irq(q_vector, adapter->rx_ring, &work_done, budget);
3020
3021 if (!tx_clean_complete)
3022 work_done = budget;
3023
3024 /* If budget not fully consumed, exit the polling mode */
3025 if (work_done < budget) {
3026 napi_complete(napi);
3027 if (adapter->rx_itr_setting & 1)
3028 ixgbe_set_itr(adapter);
3029 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3030 ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
3031 }
3032 return work_done;
3033 }
3034
3035 /**
3036 * ixgbe_tx_timeout - Respond to a Tx Hang
3037 * @netdev: network interface device structure
3038 **/
3039 static void ixgbe_tx_timeout(struct net_device *netdev)
3040 {
3041 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3042
3043 /* Do the reset outside of interrupt context */
3044 schedule_work(&adapter->reset_task);
3045 }
3046
3047 static void ixgbe_reset_task(struct work_struct *work)
3048 {
3049 struct ixgbe_adapter *adapter;
3050 adapter = container_of(work, struct ixgbe_adapter, reset_task);
3051
3052 /* If we're already down or resetting, just bail */
3053 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
3054 test_bit(__IXGBE_RESETTING, &adapter->state))
3055 return;
3056
3057 adapter->tx_timeout_count++;
3058
3059 ixgbe_reinit_locked(adapter);
3060 }
3061
3062 #ifdef CONFIG_IXGBE_DCB
3063 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
3064 {
3065 bool ret = false;
3066 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_DCB];
3067
3068 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
3069 return ret;
3070
3071 f->mask = 0x7 << 3;
3072 adapter->num_rx_queues = f->indices;
3073 adapter->num_tx_queues = f->indices;
3074 ret = true;
3075
3076 return ret;
3077 }
3078 #endif
3079
3080 /**
3081 * ixgbe_set_rss_queues: Allocate queues for RSS
3082 * @adapter: board private structure to initialize
3083 *
3084 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
3085 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
3086 *
3087 **/
3088 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
3089 {
3090 bool ret = false;
3091 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
3092
3093 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3094 f->mask = 0xF;
3095 adapter->num_rx_queues = f->indices;
3096 adapter->num_tx_queues = f->indices;
3097 ret = true;
3098 } else {
3099 ret = false;
3100 }
3101
3102 return ret;
3103 }
3104
3105 /**
3106 * ixgbe_set_fdir_queues: Allocate queues for Flow Director
3107 * @adapter: board private structure to initialize
3108 *
3109 * Flow Director is an advanced Rx filter, attempting to get Rx flows back
3110 * to the original CPU that initiated the Tx session. This runs in addition
3111 * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
3112 * Rx load across CPUs using RSS.
3113 *
3114 **/
3115 static bool inline ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
3116 {
3117 bool ret = false;
3118 struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
3119
3120 f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
3121 f_fdir->mask = 0;
3122
3123 /* Flow Director must have RSS enabled */
3124 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3125 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3126 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)))) {
3127 adapter->num_tx_queues = f_fdir->indices;
3128 adapter->num_rx_queues = f_fdir->indices;
3129 ret = true;
3130 } else {
3131 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3132 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3133 }
3134 return ret;
3135 }
3136
3137 #ifdef IXGBE_FCOE
3138 /**
3139 * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
3140 * @adapter: board private structure to initialize
3141 *
3142 * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
3143 * The ring feature mask is not used as a mask for FCoE, as it can take any 8
3144 * rx queues out of the max number of rx queues, instead, it is used as the
3145 * index of the first rx queue used by FCoE.
3146 *
3147 **/
3148 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
3149 {
3150 bool ret = false;
3151 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3152
3153 f->indices = min((int)num_online_cpus(), f->indices);
3154 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3155 adapter->num_rx_queues = 1;
3156 adapter->num_tx_queues = 1;
3157 #ifdef CONFIG_IXGBE_DCB
3158 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3159 DPRINTK(PROBE, INFO, "FCoE enabled with DCB \n");
3160 ixgbe_set_dcb_queues(adapter);
3161 }
3162 #endif
3163 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3164 DPRINTK(PROBE, INFO, "FCoE enabled with RSS \n");
3165 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3166 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3167 ixgbe_set_fdir_queues(adapter);
3168 else
3169 ixgbe_set_rss_queues(adapter);
3170 }
3171 /* adding FCoE rx rings to the end */
3172 f->mask = adapter->num_rx_queues;
3173 adapter->num_rx_queues += f->indices;
3174 adapter->num_tx_queues += f->indices;
3175
3176 ret = true;
3177 }
3178
3179 return ret;
3180 }
3181
3182 #endif /* IXGBE_FCOE */
3183 /*
3184 * ixgbe_set_num_queues: Allocate queues for device, feature dependant
3185 * @adapter: board private structure to initialize
3186 *
3187 * This is the top level queue allocation routine. The order here is very
3188 * important, starting with the "most" number of features turned on at once,
3189 * and ending with the smallest set of features. This way large combinations
3190 * can be allocated if they're turned on, and smaller combinations are the
3191 * fallthrough conditions.
3192 *
3193 **/
3194 static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
3195 {
3196 #ifdef IXGBE_FCOE
3197 if (ixgbe_set_fcoe_queues(adapter))
3198 goto done;
3199
3200 #endif /* IXGBE_FCOE */
3201 #ifdef CONFIG_IXGBE_DCB
3202 if (ixgbe_set_dcb_queues(adapter))
3203 goto done;
3204
3205 #endif
3206 if (ixgbe_set_fdir_queues(adapter))
3207 goto done;
3208
3209 if (ixgbe_set_rss_queues(adapter))
3210 goto done;
3211
3212 /* fallback to base case */
3213 adapter->num_rx_queues = 1;
3214 adapter->num_tx_queues = 1;
3215
3216 done:
3217 /* Notify the stack of the (possibly) reduced Tx Queue count. */
3218 adapter->netdev->real_num_tx_queues = adapter->num_tx_queues;
3219 }
3220
3221 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
3222 int vectors)
3223 {
3224 int err, vector_threshold;
3225
3226 /* We'll want at least 3 (vector_threshold):
3227 * 1) TxQ[0] Cleanup
3228 * 2) RxQ[0] Cleanup
3229 * 3) Other (Link Status Change, etc.)
3230 * 4) TCP Timer (optional)
3231 */
3232 vector_threshold = MIN_MSIX_COUNT;
3233
3234 /* The more we get, the more we will assign to Tx/Rx Cleanup
3235 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
3236 * Right now, we simply care about how many we'll get; we'll
3237 * set them up later while requesting irq's.
3238 */
3239 while (vectors >= vector_threshold) {
3240 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
3241 vectors);
3242 if (!err) /* Success in acquiring all requested vectors. */
3243 break;
3244 else if (err < 0)
3245 vectors = 0; /* Nasty failure, quit now */
3246 else /* err == number of vectors we should try again with */
3247 vectors = err;
3248 }
3249
3250 if (vectors < vector_threshold) {
3251 /* Can't allocate enough MSI-X interrupts? Oh well.
3252 * This just means we'll go with either a single MSI
3253 * vector or fall back to legacy interrupts.
3254 */
3255 DPRINTK(HW, DEBUG, "Unable to allocate MSI-X interrupts\n");
3256 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3257 kfree(adapter->msix_entries);
3258 adapter->msix_entries = NULL;
3259 } else {
3260 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
3261 /*
3262 * Adjust for only the vectors we'll use, which is minimum
3263 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
3264 * vectors we were allocated.
3265 */
3266 adapter->num_msix_vectors = min(vectors,
3267 adapter->max_msix_q_vectors + NON_Q_VECTORS);
3268 }
3269 }
3270
3271 /**
3272 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
3273 * @adapter: board private structure to initialize
3274 *
3275 * Cache the descriptor ring offsets for RSS to the assigned rings.
3276 *
3277 **/
3278 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
3279 {
3280 int i;
3281 bool ret = false;
3282
3283 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3284 for (i = 0; i < adapter->num_rx_queues; i++)
3285 adapter->rx_ring[i].reg_idx = i;
3286 for (i = 0; i < adapter->num_tx_queues; i++)
3287 adapter->tx_ring[i].reg_idx = i;
3288 ret = true;
3289 } else {
3290 ret = false;
3291 }
3292
3293 return ret;
3294 }
3295
3296 #ifdef CONFIG_IXGBE_DCB
3297 /**
3298 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
3299 * @adapter: board private structure to initialize
3300 *
3301 * Cache the descriptor ring offsets for DCB to the assigned rings.
3302 *
3303 **/
3304 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
3305 {
3306 int i;
3307 bool ret = false;
3308 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
3309
3310 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3311 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
3312 /* the number of queues is assumed to be symmetric */
3313 for (i = 0; i < dcb_i; i++) {
3314 adapter->rx_ring[i].reg_idx = i << 3;
3315 adapter->tx_ring[i].reg_idx = i << 2;
3316 }
3317 ret = true;
3318 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
3319 if (dcb_i == 8) {
3320 /*
3321 * Tx TC0 starts at: descriptor queue 0
3322 * Tx TC1 starts at: descriptor queue 32
3323 * Tx TC2 starts at: descriptor queue 64
3324 * Tx TC3 starts at: descriptor queue 80
3325 * Tx TC4 starts at: descriptor queue 96
3326 * Tx TC5 starts at: descriptor queue 104
3327 * Tx TC6 starts at: descriptor queue 112
3328 * Tx TC7 starts at: descriptor queue 120
3329 *
3330 * Rx TC0-TC7 are offset by 16 queues each
3331 */
3332 for (i = 0; i < 3; i++) {
3333 adapter->tx_ring[i].reg_idx = i << 5;
3334 adapter->rx_ring[i].reg_idx = i << 4;
3335 }
3336 for ( ; i < 5; i++) {
3337 adapter->tx_ring[i].reg_idx =
3338 ((i + 2) << 4);
3339 adapter->rx_ring[i].reg_idx = i << 4;
3340 }
3341 for ( ; i < dcb_i; i++) {
3342 adapter->tx_ring[i].reg_idx =
3343 ((i + 8) << 3);
3344 adapter->rx_ring[i].reg_idx = i << 4;
3345 }
3346
3347 ret = true;
3348 } else if (dcb_i == 4) {
3349 /*
3350 * Tx TC0 starts at: descriptor queue 0
3351 * Tx TC1 starts at: descriptor queue 64
3352 * Tx TC2 starts at: descriptor queue 96
3353 * Tx TC3 starts at: descriptor queue 112
3354 *
3355 * Rx TC0-TC3 are offset by 32 queues each
3356 */
3357 adapter->tx_ring[0].reg_idx = 0;
3358 adapter->tx_ring[1].reg_idx = 64;
3359 adapter->tx_ring[2].reg_idx = 96;
3360 adapter->tx_ring[3].reg_idx = 112;
3361 for (i = 0 ; i < dcb_i; i++)
3362 adapter->rx_ring[i].reg_idx = i << 5;
3363
3364 ret = true;
3365 } else {
3366 ret = false;
3367 }
3368 } else {
3369 ret = false;
3370 }
3371 } else {
3372 ret = false;
3373 }
3374
3375 return ret;
3376 }
3377 #endif
3378
3379 /**
3380 * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
3381 * @adapter: board private structure to initialize
3382 *
3383 * Cache the descriptor ring offsets for Flow Director to the assigned rings.
3384 *
3385 **/
3386 static bool inline ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
3387 {
3388 int i;
3389 bool ret = false;
3390
3391 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3392 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3393 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))) {
3394 for (i = 0; i < adapter->num_rx_queues; i++)
3395 adapter->rx_ring[i].reg_idx = i;
3396 for (i = 0; i < adapter->num_tx_queues; i++)
3397 adapter->tx_ring[i].reg_idx = i;
3398 ret = true;
3399 }
3400
3401 return ret;
3402 }
3403
3404 #ifdef IXGBE_FCOE
3405 /**
3406 * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
3407 * @adapter: board private structure to initialize
3408 *
3409 * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
3410 *
3411 */
3412 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
3413 {
3414 int i, fcoe_rx_i = 0, fcoe_tx_i = 0;
3415 bool ret = false;
3416 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3417
3418 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3419 #ifdef CONFIG_IXGBE_DCB
3420 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3421 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
3422
3423 ixgbe_cache_ring_dcb(adapter);
3424 /* find out queues in TC for FCoE */
3425 fcoe_rx_i = adapter->rx_ring[fcoe->tc].reg_idx + 1;
3426 fcoe_tx_i = adapter->tx_ring[fcoe->tc].reg_idx + 1;
3427 /*
3428 * In 82599, the number of Tx queues for each traffic
3429 * class for both 8-TC and 4-TC modes are:
3430 * TCs : TC0 TC1 TC2 TC3 TC4 TC5 TC6 TC7
3431 * 8 TCs: 32 32 16 16 8 8 8 8
3432 * 4 TCs: 64 64 32 32
3433 * We have max 8 queues for FCoE, where 8 the is
3434 * FCoE redirection table size. If TC for FCoE is
3435 * less than or equal to TC3, we have enough queues
3436 * to add max of 8 queues for FCoE, so we start FCoE
3437 * tx descriptor from the next one, i.e., reg_idx + 1.
3438 * If TC for FCoE is above TC3, implying 8 TC mode,
3439 * and we need 8 for FCoE, we have to take all queues
3440 * in that traffic class for FCoE.
3441 */
3442 if ((f->indices == IXGBE_FCRETA_SIZE) && (fcoe->tc > 3))
3443 fcoe_tx_i--;
3444 }
3445 #endif /* CONFIG_IXGBE_DCB */
3446 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3447 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3448 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3449 ixgbe_cache_ring_fdir(adapter);
3450 else
3451 ixgbe_cache_ring_rss(adapter);
3452
3453 fcoe_rx_i = f->mask;
3454 fcoe_tx_i = f->mask;
3455 }
3456 for (i = 0; i < f->indices; i++, fcoe_rx_i++, fcoe_tx_i++) {
3457 adapter->rx_ring[f->mask + i].reg_idx = fcoe_rx_i;
3458 adapter->tx_ring[f->mask + i].reg_idx = fcoe_tx_i;
3459 }
3460 ret = true;
3461 }
3462 return ret;
3463 }
3464
3465 #endif /* IXGBE_FCOE */
3466 /**
3467 * ixgbe_cache_ring_register - Descriptor ring to register mapping
3468 * @adapter: board private structure to initialize
3469 *
3470 * Once we know the feature-set enabled for the device, we'll cache
3471 * the register offset the descriptor ring is assigned to.
3472 *
3473 * Note, the order the various feature calls is important. It must start with
3474 * the "most" features enabled at the same time, then trickle down to the
3475 * least amount of features turned on at once.
3476 **/
3477 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
3478 {
3479 /* start with default case */
3480 adapter->rx_ring[0].reg_idx = 0;
3481 adapter->tx_ring[0].reg_idx = 0;
3482
3483 #ifdef IXGBE_FCOE
3484 if (ixgbe_cache_ring_fcoe(adapter))
3485 return;
3486
3487 #endif /* IXGBE_FCOE */
3488 #ifdef CONFIG_IXGBE_DCB
3489 if (ixgbe_cache_ring_dcb(adapter))
3490 return;
3491
3492 #endif
3493 if (ixgbe_cache_ring_fdir(adapter))
3494 return;
3495
3496 if (ixgbe_cache_ring_rss(adapter))
3497 return;
3498 }
3499
3500 /**
3501 * ixgbe_alloc_queues - Allocate memory for all rings
3502 * @adapter: board private structure to initialize
3503 *
3504 * We allocate one ring per queue at run-time since we don't know the
3505 * number of queues at compile-time. The polling_netdev array is
3506 * intended for Multiqueue, but should work fine with a single queue.
3507 **/
3508 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
3509 {
3510 int i;
3511
3512 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
3513 sizeof(struct ixgbe_ring), GFP_KERNEL);
3514 if (!adapter->tx_ring)
3515 goto err_tx_ring_allocation;
3516
3517 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
3518 sizeof(struct ixgbe_ring), GFP_KERNEL);
3519 if (!adapter->rx_ring)
3520 goto err_rx_ring_allocation;
3521
3522 for (i = 0; i < adapter->num_tx_queues; i++) {
3523 adapter->tx_ring[i].count = adapter->tx_ring_count;
3524 adapter->tx_ring[i].queue_index = i;
3525 }
3526
3527 for (i = 0; i < adapter->num_rx_queues; i++) {
3528 adapter->rx_ring[i].count = adapter->rx_ring_count;
3529 adapter->rx_ring[i].queue_index = i;
3530 }
3531
3532 ixgbe_cache_ring_register(adapter);
3533
3534 return 0;
3535
3536 err_rx_ring_allocation:
3537 kfree(adapter->tx_ring);
3538 err_tx_ring_allocation:
3539 return -ENOMEM;
3540 }
3541
3542 /**
3543 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
3544 * @adapter: board private structure to initialize
3545 *
3546 * Attempt to configure the interrupts using the best available
3547 * capabilities of the hardware and the kernel.
3548 **/
3549 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
3550 {
3551 struct ixgbe_hw *hw = &adapter->hw;
3552 int err = 0;
3553 int vector, v_budget;
3554
3555 /*
3556 * It's easy to be greedy for MSI-X vectors, but it really
3557 * doesn't do us much good if we have a lot more vectors
3558 * than CPU's. So let's be conservative and only ask for
3559 * (roughly) twice the number of vectors as there are CPU's.
3560 */
3561 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
3562 (int)(num_online_cpus() * 2)) + NON_Q_VECTORS;
3563
3564 /*
3565 * At the same time, hardware can only support a maximum of
3566 * hw.mac->max_msix_vectors vectors. With features
3567 * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
3568 * descriptor queues supported by our device. Thus, we cap it off in
3569 * those rare cases where the cpu count also exceeds our vector limit.
3570 */
3571 v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
3572
3573 /* A failure in MSI-X entry allocation isn't fatal, but it does
3574 * mean we disable MSI-X capabilities of the adapter. */
3575 adapter->msix_entries = kcalloc(v_budget,
3576 sizeof(struct msix_entry), GFP_KERNEL);
3577 if (adapter->msix_entries) {
3578 for (vector = 0; vector < v_budget; vector++)
3579 adapter->msix_entries[vector].entry = vector;
3580
3581 ixgbe_acquire_msix_vectors(adapter, v_budget);
3582
3583 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3584 goto out;
3585 }
3586
3587 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
3588 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
3589 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3590 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3591 adapter->atr_sample_rate = 0;
3592 ixgbe_set_num_queues(adapter);
3593
3594 err = pci_enable_msi(adapter->pdev);
3595 if (!err) {
3596 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
3597 } else {
3598 DPRINTK(HW, DEBUG, "Unable to allocate MSI interrupt, "
3599 "falling back to legacy. Error: %d\n", err);
3600 /* reset err */
3601 err = 0;
3602 }
3603
3604 out:
3605 return err;
3606 }
3607
3608 /**
3609 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
3610 * @adapter: board private structure to initialize
3611 *
3612 * We allocate one q_vector per queue interrupt. If allocation fails we
3613 * return -ENOMEM.
3614 **/
3615 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
3616 {
3617 int q_idx, num_q_vectors;
3618 struct ixgbe_q_vector *q_vector;
3619 int napi_vectors;
3620 int (*poll)(struct napi_struct *, int);
3621
3622 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3623 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3624 napi_vectors = adapter->num_rx_queues;
3625 poll = &ixgbe_clean_rxtx_many;
3626 } else {
3627 num_q_vectors = 1;
3628 napi_vectors = 1;
3629 poll = &ixgbe_poll;
3630 }
3631
3632 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3633 q_vector = kzalloc(sizeof(struct ixgbe_q_vector), GFP_KERNEL);
3634 if (!q_vector)
3635 goto err_out;
3636 q_vector->adapter = adapter;
3637 if (q_vector->txr_count && !q_vector->rxr_count)
3638 q_vector->eitr = adapter->tx_eitr_param;
3639 else
3640 q_vector->eitr = adapter->rx_eitr_param;
3641 q_vector->v_idx = q_idx;
3642 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
3643 adapter->q_vector[q_idx] = q_vector;
3644 }
3645
3646 return 0;
3647
3648 err_out:
3649 while (q_idx) {
3650 q_idx--;
3651 q_vector = adapter->q_vector[q_idx];
3652 netif_napi_del(&q_vector->napi);
3653 kfree(q_vector);
3654 adapter->q_vector[q_idx] = NULL;
3655 }
3656 return -ENOMEM;
3657 }
3658
3659 /**
3660 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
3661 * @adapter: board private structure to initialize
3662 *
3663 * This function frees the memory allocated to the q_vectors. In addition if
3664 * NAPI is enabled it will delete any references to the NAPI struct prior
3665 * to freeing the q_vector.
3666 **/
3667 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
3668 {
3669 int q_idx, num_q_vectors;
3670
3671 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3672 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3673 else
3674 num_q_vectors = 1;
3675
3676 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3677 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
3678 adapter->q_vector[q_idx] = NULL;
3679 netif_napi_del(&q_vector->napi);
3680 kfree(q_vector);
3681 }
3682 }
3683
3684 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
3685 {
3686 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3687 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3688 pci_disable_msix(adapter->pdev);
3689 kfree(adapter->msix_entries);
3690 adapter->msix_entries = NULL;
3691 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
3692 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
3693 pci_disable_msi(adapter->pdev);
3694 }
3695 return;
3696 }
3697
3698 /**
3699 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
3700 * @adapter: board private structure to initialize
3701 *
3702 * We determine which interrupt scheme to use based on...
3703 * - Kernel support (MSI, MSI-X)
3704 * - which can be user-defined (via MODULE_PARAM)
3705 * - Hardware queue count (num_*_queues)
3706 * - defined by miscellaneous hardware support/features (RSS, etc.)
3707 **/
3708 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
3709 {
3710 int err;
3711
3712 /* Number of supported queues */
3713 ixgbe_set_num_queues(adapter);
3714
3715 err = ixgbe_set_interrupt_capability(adapter);
3716 if (err) {
3717 DPRINTK(PROBE, ERR, "Unable to setup interrupt capabilities\n");
3718 goto err_set_interrupt;
3719 }
3720
3721 err = ixgbe_alloc_q_vectors(adapter);
3722 if (err) {
3723 DPRINTK(PROBE, ERR, "Unable to allocate memory for queue "
3724 "vectors\n");
3725 goto err_alloc_q_vectors;
3726 }
3727
3728 err = ixgbe_alloc_queues(adapter);
3729 if (err) {
3730 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
3731 goto err_alloc_queues;
3732 }
3733
3734 DPRINTK(DRV, INFO, "Multiqueue %s: Rx Queue count = %u, "
3735 "Tx Queue count = %u\n",
3736 (adapter->num_rx_queues > 1) ? "Enabled" :
3737 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
3738
3739 set_bit(__IXGBE_DOWN, &adapter->state);
3740
3741 return 0;
3742
3743 err_alloc_queues:
3744 ixgbe_free_q_vectors(adapter);
3745 err_alloc_q_vectors:
3746 ixgbe_reset_interrupt_capability(adapter);
3747 err_set_interrupt:
3748 return err;
3749 }
3750
3751 /**
3752 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
3753 * @adapter: board private structure to clear interrupt scheme on
3754 *
3755 * We go through and clear interrupt specific resources and reset the structure
3756 * to pre-load conditions
3757 **/
3758 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
3759 {
3760 kfree(adapter->tx_ring);
3761 kfree(adapter->rx_ring);
3762 adapter->tx_ring = NULL;
3763 adapter->rx_ring = NULL;
3764
3765 ixgbe_free_q_vectors(adapter);
3766 ixgbe_reset_interrupt_capability(adapter);
3767 }
3768
3769 /**
3770 * ixgbe_sfp_timer - worker thread to find a missing module
3771 * @data: pointer to our adapter struct
3772 **/
3773 static void ixgbe_sfp_timer(unsigned long data)
3774 {
3775 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
3776
3777 /*
3778 * Do the sfp_timer outside of interrupt context due to the
3779 * delays that sfp+ detection requires
3780 */
3781 schedule_work(&adapter->sfp_task);
3782 }
3783
3784 /**
3785 * ixgbe_sfp_task - worker thread to find a missing module
3786 * @work: pointer to work_struct containing our data
3787 **/
3788 static void ixgbe_sfp_task(struct work_struct *work)
3789 {
3790 struct ixgbe_adapter *adapter = container_of(work,
3791 struct ixgbe_adapter,
3792 sfp_task);
3793 struct ixgbe_hw *hw = &adapter->hw;
3794
3795 if ((hw->phy.type == ixgbe_phy_nl) &&
3796 (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
3797 s32 ret = hw->phy.ops.identify_sfp(hw);
3798 if (ret == IXGBE_ERR_SFP_NOT_PRESENT)
3799 goto reschedule;
3800 ret = hw->phy.ops.reset(hw);
3801 if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
3802 dev_err(&adapter->pdev->dev, "failed to initialize "
3803 "because an unsupported SFP+ module type "
3804 "was detected.\n"
3805 "Reload the driver after installing a "
3806 "supported module.\n");
3807 unregister_netdev(adapter->netdev);
3808 } else {
3809 DPRINTK(PROBE, INFO, "detected SFP+: %d\n",
3810 hw->phy.sfp_type);
3811 }
3812 /* don't need this routine any more */
3813 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3814 }
3815 return;
3816 reschedule:
3817 if (test_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state))
3818 mod_timer(&adapter->sfp_timer,
3819 round_jiffies(jiffies + (2 * HZ)));
3820 }
3821
3822 /**
3823 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
3824 * @adapter: board private structure to initialize
3825 *
3826 * ixgbe_sw_init initializes the Adapter private data structure.
3827 * Fields are initialized based on PCI device information and
3828 * OS network device settings (MTU size).
3829 **/
3830 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
3831 {
3832 struct ixgbe_hw *hw = &adapter->hw;
3833 struct pci_dev *pdev = adapter->pdev;
3834 unsigned int rss;
3835 #ifdef CONFIG_IXGBE_DCB
3836 int j;
3837 struct tc_configuration *tc;
3838 #endif
3839
3840 /* PCI config space info */
3841
3842 hw->vendor_id = pdev->vendor;
3843 hw->device_id = pdev->device;
3844 hw->revision_id = pdev->revision;
3845 hw->subsystem_vendor_id = pdev->subsystem_vendor;
3846 hw->subsystem_device_id = pdev->subsystem_device;
3847
3848 /* Set capability flags */
3849 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
3850 adapter->ring_feature[RING_F_RSS].indices = rss;
3851 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
3852 adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
3853 if (hw->mac.type == ixgbe_mac_82598EB) {
3854 if (hw->device_id == IXGBE_DEV_ID_82598AT)
3855 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
3856 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
3857 } else if (hw->mac.type == ixgbe_mac_82599EB) {
3858 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
3859 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
3860 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
3861 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
3862 adapter->ring_feature[RING_F_FDIR].indices =
3863 IXGBE_MAX_FDIR_INDICES;
3864 adapter->atr_sample_rate = 20;
3865 adapter->fdir_pballoc = 0;
3866 #ifdef IXGBE_FCOE
3867 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
3868 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
3869 adapter->ring_feature[RING_F_FCOE].indices = 0;
3870 /* Default traffic class to use for FCoE */
3871 adapter->fcoe.tc = IXGBE_FCOE_DEFTC;
3872 #endif /* IXGBE_FCOE */
3873 }
3874
3875 #ifdef CONFIG_IXGBE_DCB
3876 /* Configure DCB traffic classes */
3877 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
3878 tc = &adapter->dcb_cfg.tc_config[j];
3879 tc->path[DCB_TX_CONFIG].bwg_id = 0;
3880 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
3881 tc->path[DCB_RX_CONFIG].bwg_id = 0;
3882 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
3883 tc->dcb_pfc = pfc_disabled;
3884 }
3885 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
3886 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
3887 adapter->dcb_cfg.rx_pba_cfg = pba_equal;
3888 adapter->dcb_cfg.pfc_mode_enable = false;
3889 adapter->dcb_cfg.round_robin_enable = false;
3890 adapter->dcb_set_bitmap = 0x00;
3891 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
3892 adapter->ring_feature[RING_F_DCB].indices);
3893
3894 #endif
3895
3896 /* default flow control settings */
3897 hw->fc.requested_mode = ixgbe_fc_full;
3898 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
3899 #ifdef CONFIG_DCB
3900 adapter->last_lfc_mode = hw->fc.current_mode;
3901 #endif
3902 hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
3903 hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
3904 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
3905 hw->fc.send_xon = true;
3906 hw->fc.disable_fc_autoneg = false;
3907
3908 /* enable itr by default in dynamic mode */
3909 adapter->rx_itr_setting = 1;
3910 adapter->rx_eitr_param = 20000;
3911 adapter->tx_itr_setting = 1;
3912 adapter->tx_eitr_param = 10000;
3913
3914 /* set defaults for eitr in MegaBytes */
3915 adapter->eitr_low = 10;
3916 adapter->eitr_high = 20;
3917
3918 /* set default ring sizes */
3919 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
3920 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
3921
3922 /* initialize eeprom parameters */
3923 if (ixgbe_init_eeprom_params_generic(hw)) {
3924 dev_err(&pdev->dev, "EEPROM initialization failed\n");
3925 return -EIO;
3926 }
3927
3928 /* enable rx csum by default */
3929 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
3930
3931 set_bit(__IXGBE_DOWN, &adapter->state);
3932
3933 return 0;
3934 }
3935
3936 /**
3937 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
3938 * @adapter: board private structure
3939 * @tx_ring: tx descriptor ring (for a specific queue) to setup
3940 *
3941 * Return 0 on success, negative on failure
3942 **/
3943 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
3944 struct ixgbe_ring *tx_ring)
3945 {
3946 struct pci_dev *pdev = adapter->pdev;
3947 int size;
3948
3949 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
3950 tx_ring->tx_buffer_info = vmalloc(size);
3951 if (!tx_ring->tx_buffer_info)
3952 goto err;
3953 memset(tx_ring->tx_buffer_info, 0, size);
3954
3955 /* round up to nearest 4K */
3956 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
3957 tx_ring->size = ALIGN(tx_ring->size, 4096);
3958
3959 tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
3960 &tx_ring->dma);
3961 if (!tx_ring->desc)
3962 goto err;
3963
3964 tx_ring->next_to_use = 0;
3965 tx_ring->next_to_clean = 0;
3966 tx_ring->work_limit = tx_ring->count;
3967 return 0;
3968
3969 err:
3970 vfree(tx_ring->tx_buffer_info);
3971 tx_ring->tx_buffer_info = NULL;
3972 DPRINTK(PROBE, ERR, "Unable to allocate memory for the transmit "
3973 "descriptor ring\n");
3974 return -ENOMEM;
3975 }
3976
3977 /**
3978 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
3979 * @adapter: board private structure
3980 *
3981 * If this function returns with an error, then it's possible one or
3982 * more of the rings is populated (while the rest are not). It is the
3983 * callers duty to clean those orphaned rings.
3984 *
3985 * Return 0 on success, negative on failure
3986 **/
3987 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
3988 {
3989 int i, err = 0;
3990
3991 for (i = 0; i < adapter->num_tx_queues; i++) {
3992 err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]);
3993 if (!err)
3994 continue;
3995 DPRINTK(PROBE, ERR, "Allocation for Tx Queue %u failed\n", i);
3996 break;
3997 }
3998
3999 return err;
4000 }
4001
4002 /**
4003 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
4004 * @adapter: board private structure
4005 * @rx_ring: rx descriptor ring (for a specific queue) to setup
4006 *
4007 * Returns 0 on success, negative on failure
4008 **/
4009 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
4010 struct ixgbe_ring *rx_ring)
4011 {
4012 struct pci_dev *pdev = adapter->pdev;
4013 int size;
4014
4015 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4016 rx_ring->rx_buffer_info = vmalloc(size);
4017 if (!rx_ring->rx_buffer_info) {
4018 DPRINTK(PROBE, ERR,
4019 "vmalloc allocation failed for the rx desc ring\n");
4020 goto alloc_failed;
4021 }
4022 memset(rx_ring->rx_buffer_info, 0, size);
4023
4024 /* Round up to nearest 4K */
4025 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
4026 rx_ring->size = ALIGN(rx_ring->size, 4096);
4027
4028 rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size, &rx_ring->dma);
4029
4030 if (!rx_ring->desc) {
4031 DPRINTK(PROBE, ERR,
4032 "Memory allocation failed for the rx desc ring\n");
4033 vfree(rx_ring->rx_buffer_info);
4034 goto alloc_failed;
4035 }
4036
4037 rx_ring->next_to_clean = 0;
4038 rx_ring->next_to_use = 0;
4039
4040 return 0;
4041
4042 alloc_failed:
4043 return -ENOMEM;
4044 }
4045
4046 /**
4047 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
4048 * @adapter: board private structure
4049 *
4050 * If this function returns with an error, then it's possible one or
4051 * more of the rings is populated (while the rest are not). It is the
4052 * callers duty to clean those orphaned rings.
4053 *
4054 * Return 0 on success, negative on failure
4055 **/
4056
4057 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
4058 {
4059 int i, err = 0;
4060
4061 for (i = 0; i < adapter->num_rx_queues; i++) {
4062 err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]);
4063 if (!err)
4064 continue;
4065 DPRINTK(PROBE, ERR, "Allocation for Rx Queue %u failed\n", i);
4066 break;
4067 }
4068
4069 return err;
4070 }
4071
4072 /**
4073 * ixgbe_free_tx_resources - Free Tx Resources per Queue
4074 * @adapter: board private structure
4075 * @tx_ring: Tx descriptor ring for a specific queue
4076 *
4077 * Free all transmit software resources
4078 **/
4079 void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
4080 struct ixgbe_ring *tx_ring)
4081 {
4082 struct pci_dev *pdev = adapter->pdev;
4083
4084 ixgbe_clean_tx_ring(adapter, tx_ring);
4085
4086 vfree(tx_ring->tx_buffer_info);
4087 tx_ring->tx_buffer_info = NULL;
4088
4089 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
4090
4091 tx_ring->desc = NULL;
4092 }
4093
4094 /**
4095 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
4096 * @adapter: board private structure
4097 *
4098 * Free all transmit software resources
4099 **/
4100 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
4101 {
4102 int i;
4103
4104 for (i = 0; i < adapter->num_tx_queues; i++)
4105 if (adapter->tx_ring[i].desc)
4106 ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
4107 }
4108
4109 /**
4110 * ixgbe_free_rx_resources - Free Rx Resources
4111 * @adapter: board private structure
4112 * @rx_ring: ring to clean the resources from
4113 *
4114 * Free all receive software resources
4115 **/
4116 void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
4117 struct ixgbe_ring *rx_ring)
4118 {
4119 struct pci_dev *pdev = adapter->pdev;
4120
4121 ixgbe_clean_rx_ring(adapter, rx_ring);
4122
4123 vfree(rx_ring->rx_buffer_info);
4124 rx_ring->rx_buffer_info = NULL;
4125
4126 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
4127
4128 rx_ring->desc = NULL;
4129 }
4130
4131 /**
4132 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
4133 * @adapter: board private structure
4134 *
4135 * Free all receive software resources
4136 **/
4137 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
4138 {
4139 int i;
4140
4141 for (i = 0; i < adapter->num_rx_queues; i++)
4142 if (adapter->rx_ring[i].desc)
4143 ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
4144 }
4145
4146 /**
4147 * ixgbe_change_mtu - Change the Maximum Transfer Unit
4148 * @netdev: network interface device structure
4149 * @new_mtu: new value for maximum frame size
4150 *
4151 * Returns 0 on success, negative on failure
4152 **/
4153 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
4154 {
4155 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4156 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4157
4158 /* MTU < 68 is an error and causes problems on some kernels */
4159 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
4160 return -EINVAL;
4161
4162 DPRINTK(PROBE, INFO, "changing MTU from %d to %d\n",
4163 netdev->mtu, new_mtu);
4164 /* must set new MTU before calling down or up */
4165 netdev->mtu = new_mtu;
4166
4167 if (netif_running(netdev))
4168 ixgbe_reinit_locked(adapter);
4169
4170 return 0;
4171 }
4172
4173 /**
4174 * ixgbe_open - Called when a network interface is made active
4175 * @netdev: network interface device structure
4176 *
4177 * Returns 0 on success, negative value on failure
4178 *
4179 * The open entry point is called when a network interface is made
4180 * active by the system (IFF_UP). At this point all resources needed
4181 * for transmit and receive operations are allocated, the interrupt
4182 * handler is registered with the OS, the watchdog timer is started,
4183 * and the stack is notified that the interface is ready.
4184 **/
4185 static int ixgbe_open(struct net_device *netdev)
4186 {
4187 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4188 int err;
4189
4190 /* disallow open during test */
4191 if (test_bit(__IXGBE_TESTING, &adapter->state))
4192 return -EBUSY;
4193
4194 netif_carrier_off(netdev);
4195
4196 /* allocate transmit descriptors */
4197 err = ixgbe_setup_all_tx_resources(adapter);
4198 if (err)
4199 goto err_setup_tx;
4200
4201 /* allocate receive descriptors */
4202 err = ixgbe_setup_all_rx_resources(adapter);
4203 if (err)
4204 goto err_setup_rx;
4205
4206 ixgbe_configure(adapter);
4207
4208 err = ixgbe_request_irq(adapter);
4209 if (err)
4210 goto err_req_irq;
4211
4212 err = ixgbe_up_complete(adapter);
4213 if (err)
4214 goto err_up;
4215
4216 netif_tx_start_all_queues(netdev);
4217
4218 return 0;
4219
4220 err_up:
4221 ixgbe_release_hw_control(adapter);
4222 ixgbe_free_irq(adapter);
4223 err_req_irq:
4224 err_setup_rx:
4225 ixgbe_free_all_rx_resources(adapter);
4226 err_setup_tx:
4227 ixgbe_free_all_tx_resources(adapter);
4228 ixgbe_reset(adapter);
4229
4230 return err;
4231 }
4232
4233 /**
4234 * ixgbe_close - Disables a network interface
4235 * @netdev: network interface device structure
4236 *
4237 * Returns 0, this is not allowed to fail
4238 *
4239 * The close entry point is called when an interface is de-activated
4240 * by the OS. The hardware is still under the drivers control, but
4241 * needs to be disabled. A global MAC reset is issued to stop the
4242 * hardware, and all transmit and receive resources are freed.
4243 **/
4244 static int ixgbe_close(struct net_device *netdev)
4245 {
4246 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4247
4248 ixgbe_down(adapter);
4249 ixgbe_free_irq(adapter);
4250
4251 ixgbe_free_all_tx_resources(adapter);
4252 ixgbe_free_all_rx_resources(adapter);
4253
4254 ixgbe_release_hw_control(adapter);
4255
4256 return 0;
4257 }
4258
4259 #ifdef CONFIG_PM
4260 static int ixgbe_resume(struct pci_dev *pdev)
4261 {
4262 struct net_device *netdev = pci_get_drvdata(pdev);
4263 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4264 u32 err;
4265
4266 pci_set_power_state(pdev, PCI_D0);
4267 pci_restore_state(pdev);
4268
4269 err = pci_enable_device_mem(pdev);
4270 if (err) {
4271 printk(KERN_ERR "ixgbe: Cannot enable PCI device from "
4272 "suspend\n");
4273 return err;
4274 }
4275 pci_set_master(pdev);
4276
4277 pci_wake_from_d3(pdev, false);
4278
4279 err = ixgbe_init_interrupt_scheme(adapter);
4280 if (err) {
4281 printk(KERN_ERR "ixgbe: Cannot initialize interrupts for "
4282 "device\n");
4283 return err;
4284 }
4285
4286 ixgbe_reset(adapter);
4287
4288 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
4289
4290 if (netif_running(netdev)) {
4291 err = ixgbe_open(adapter->netdev);
4292 if (err)
4293 return err;
4294 }
4295
4296 netif_device_attach(netdev);
4297
4298 return 0;
4299 }
4300 #endif /* CONFIG_PM */
4301
4302 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
4303 {
4304 struct net_device *netdev = pci_get_drvdata(pdev);
4305 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4306 struct ixgbe_hw *hw = &adapter->hw;
4307 u32 ctrl, fctrl;
4308 u32 wufc = adapter->wol;
4309 #ifdef CONFIG_PM
4310 int retval = 0;
4311 #endif
4312
4313 netif_device_detach(netdev);
4314
4315 if (netif_running(netdev)) {
4316 ixgbe_down(adapter);
4317 ixgbe_free_irq(adapter);
4318 ixgbe_free_all_tx_resources(adapter);
4319 ixgbe_free_all_rx_resources(adapter);
4320 }
4321 ixgbe_clear_interrupt_scheme(adapter);
4322
4323 #ifdef CONFIG_PM
4324 retval = pci_save_state(pdev);
4325 if (retval)
4326 return retval;
4327
4328 #endif
4329 if (wufc) {
4330 ixgbe_set_rx_mode(netdev);
4331
4332 /* turn on all-multi mode if wake on multicast is enabled */
4333 if (wufc & IXGBE_WUFC_MC) {
4334 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4335 fctrl |= IXGBE_FCTRL_MPE;
4336 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
4337 }
4338
4339 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
4340 ctrl |= IXGBE_CTRL_GIO_DIS;
4341 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
4342
4343 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
4344 } else {
4345 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
4346 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
4347 }
4348
4349 if (wufc && hw->mac.type == ixgbe_mac_82599EB)
4350 pci_wake_from_d3(pdev, true);
4351 else
4352 pci_wake_from_d3(pdev, false);
4353
4354 *enable_wake = !!wufc;
4355
4356 ixgbe_release_hw_control(adapter);
4357
4358 pci_disable_device(pdev);
4359
4360 return 0;
4361 }
4362
4363 #ifdef CONFIG_PM
4364 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
4365 {
4366 int retval;
4367 bool wake;
4368
4369 retval = __ixgbe_shutdown(pdev, &wake);
4370 if (retval)
4371 return retval;
4372
4373 if (wake) {
4374 pci_prepare_to_sleep(pdev);
4375 } else {
4376 pci_wake_from_d3(pdev, false);
4377 pci_set_power_state(pdev, PCI_D3hot);
4378 }
4379
4380 return 0;
4381 }
4382 #endif /* CONFIG_PM */
4383
4384 static void ixgbe_shutdown(struct pci_dev *pdev)
4385 {
4386 bool wake;
4387
4388 __ixgbe_shutdown(pdev, &wake);
4389
4390 if (system_state == SYSTEM_POWER_OFF) {
4391 pci_wake_from_d3(pdev, wake);
4392 pci_set_power_state(pdev, PCI_D3hot);
4393 }
4394 }
4395
4396 /**
4397 * ixgbe_update_stats - Update the board statistics counters.
4398 * @adapter: board private structure
4399 **/
4400 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
4401 {
4402 struct ixgbe_hw *hw = &adapter->hw;
4403 u64 total_mpc = 0;
4404 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
4405
4406 if (hw->mac.type == ixgbe_mac_82599EB) {
4407 u64 rsc_count = 0;
4408 for (i = 0; i < 16; i++)
4409 adapter->hw_rx_no_dma_resources +=
4410 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4411 for (i = 0; i < adapter->num_rx_queues; i++)
4412 rsc_count += adapter->rx_ring[i].rsc_count;
4413 adapter->rsc_count = rsc_count;
4414 }
4415
4416 adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
4417 for (i = 0; i < 8; i++) {
4418 /* for packet buffers not used, the register should read 0 */
4419 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
4420 missed_rx += mpc;
4421 adapter->stats.mpc[i] += mpc;
4422 total_mpc += adapter->stats.mpc[i];
4423 if (hw->mac.type == ixgbe_mac_82598EB)
4424 adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
4425 adapter->stats.qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
4426 adapter->stats.qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
4427 adapter->stats.qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
4428 adapter->stats.qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
4429 if (hw->mac.type == ixgbe_mac_82599EB) {
4430 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4431 IXGBE_PXONRXCNT(i));
4432 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4433 IXGBE_PXOFFRXCNT(i));
4434 adapter->stats.qprdc[i] += IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4435 } else {
4436 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4437 IXGBE_PXONRXC(i));
4438 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4439 IXGBE_PXOFFRXC(i));
4440 }
4441 adapter->stats.pxontxc[i] += IXGBE_READ_REG(hw,
4442 IXGBE_PXONTXC(i));
4443 adapter->stats.pxofftxc[i] += IXGBE_READ_REG(hw,
4444 IXGBE_PXOFFTXC(i));
4445 }
4446 adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
4447 /* work around hardware counting issue */
4448 adapter->stats.gprc -= missed_rx;
4449
4450 /* 82598 hardware only has a 32 bit counter in the high register */
4451 if (hw->mac.type == ixgbe_mac_82599EB) {
4452 u64 tmp;
4453 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
4454 tmp = IXGBE_READ_REG(hw, IXGBE_GORCH) & 0xF; /* 4 high bits of GORC */
4455 adapter->stats.gorc += (tmp << 32);
4456 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
4457 tmp = IXGBE_READ_REG(hw, IXGBE_GOTCH) & 0xF; /* 4 high bits of GOTC */
4458 adapter->stats.gotc += (tmp << 32);
4459 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORL);
4460 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
4461 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
4462 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
4463 adapter->stats.fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
4464 adapter->stats.fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
4465 #ifdef IXGBE_FCOE
4466 adapter->stats.fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
4467 adapter->stats.fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
4468 adapter->stats.fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
4469 adapter->stats.fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
4470 adapter->stats.fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
4471 adapter->stats.fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
4472 #endif /* IXGBE_FCOE */
4473 } else {
4474 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
4475 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
4476 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
4477 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
4478 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
4479 }
4480 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
4481 adapter->stats.bprc += bprc;
4482 adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
4483 if (hw->mac.type == ixgbe_mac_82598EB)
4484 adapter->stats.mprc -= bprc;
4485 adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
4486 adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
4487 adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
4488 adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
4489 adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
4490 adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
4491 adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
4492 adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
4493 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
4494 adapter->stats.lxontxc += lxon;
4495 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
4496 adapter->stats.lxofftxc += lxoff;
4497 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4498 adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
4499 adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
4500 /*
4501 * 82598 errata - tx of flow control packets is included in tx counters
4502 */
4503 xon_off_tot = lxon + lxoff;
4504 adapter->stats.gptc -= xon_off_tot;
4505 adapter->stats.mptc -= xon_off_tot;
4506 adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
4507 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4508 adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
4509 adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
4510 adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
4511 adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
4512 adapter->stats.ptc64 -= xon_off_tot;
4513 adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
4514 adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
4515 adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
4516 adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
4517 adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
4518 adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
4519
4520 /* Fill out the OS statistics structure */
4521 adapter->net_stats.multicast = adapter->stats.mprc;
4522
4523 /* Rx Errors */
4524 adapter->net_stats.rx_errors = adapter->stats.crcerrs +
4525 adapter->stats.rlec;
4526 adapter->net_stats.rx_dropped = 0;
4527 adapter->net_stats.rx_length_errors = adapter->stats.rlec;
4528 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
4529 adapter->net_stats.rx_missed_errors = total_mpc;
4530 }
4531
4532 /**
4533 * ixgbe_watchdog - Timer Call-back
4534 * @data: pointer to adapter cast into an unsigned long
4535 **/
4536 static void ixgbe_watchdog(unsigned long data)
4537 {
4538 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4539 struct ixgbe_hw *hw = &adapter->hw;
4540 u64 eics = 0;
4541 int i;
4542
4543 /*
4544 * Do the watchdog outside of interrupt context due to the lovely
4545 * delays that some of the newer hardware requires
4546 */
4547
4548 if (test_bit(__IXGBE_DOWN, &adapter->state))
4549 goto watchdog_short_circuit;
4550
4551 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
4552 /*
4553 * for legacy and MSI interrupts don't set any bits
4554 * that are enabled for EIAM, because this operation
4555 * would set *both* EIMS and EICS for any bit in EIAM
4556 */
4557 IXGBE_WRITE_REG(hw, IXGBE_EICS,
4558 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
4559 goto watchdog_reschedule;
4560 }
4561
4562 /* get one bit for every active tx/rx interrupt vector */
4563 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
4564 struct ixgbe_q_vector *qv = adapter->q_vector[i];
4565 if (qv->rxr_count || qv->txr_count)
4566 eics |= ((u64)1 << i);
4567 }
4568
4569 /* Cause software interrupt to ensure rx rings are cleaned */
4570 ixgbe_irq_rearm_queues(adapter, eics);
4571
4572 watchdog_reschedule:
4573 /* Reset the timer */
4574 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
4575
4576 watchdog_short_circuit:
4577 schedule_work(&adapter->watchdog_task);
4578 }
4579
4580 /**
4581 * ixgbe_multispeed_fiber_task - worker thread to configure multispeed fiber
4582 * @work: pointer to work_struct containing our data
4583 **/
4584 static void ixgbe_multispeed_fiber_task(struct work_struct *work)
4585 {
4586 struct ixgbe_adapter *adapter = container_of(work,
4587 struct ixgbe_adapter,
4588 multispeed_fiber_task);
4589 struct ixgbe_hw *hw = &adapter->hw;
4590 u32 autoneg;
4591 bool negotiation;
4592
4593 adapter->flags |= IXGBE_FLAG_IN_SFP_LINK_TASK;
4594 autoneg = hw->phy.autoneg_advertised;
4595 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
4596 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
4597 if (hw->mac.ops.setup_link)
4598 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
4599 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
4600 adapter->flags &= ~IXGBE_FLAG_IN_SFP_LINK_TASK;
4601 }
4602
4603 /**
4604 * ixgbe_sfp_config_module_task - worker thread to configure a new SFP+ module
4605 * @work: pointer to work_struct containing our data
4606 **/
4607 static void ixgbe_sfp_config_module_task(struct work_struct *work)
4608 {
4609 struct ixgbe_adapter *adapter = container_of(work,
4610 struct ixgbe_adapter,
4611 sfp_config_module_task);
4612 struct ixgbe_hw *hw = &adapter->hw;
4613 u32 err;
4614
4615 adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
4616
4617 /* Time for electrical oscillations to settle down */
4618 msleep(100);
4619 err = hw->phy.ops.identify_sfp(hw);
4620
4621 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
4622 dev_err(&adapter->pdev->dev, "failed to initialize because "
4623 "an unsupported SFP+ module type was detected.\n"
4624 "Reload the driver after installing a supported "
4625 "module.\n");
4626 unregister_netdev(adapter->netdev);
4627 return;
4628 }
4629 hw->mac.ops.setup_sfp(hw);
4630
4631 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
4632 /* This will also work for DA Twinax connections */
4633 schedule_work(&adapter->multispeed_fiber_task);
4634 adapter->flags &= ~IXGBE_FLAG_IN_SFP_MOD_TASK;
4635 }
4636
4637 /**
4638 * ixgbe_fdir_reinit_task - worker thread to reinit FDIR filter table
4639 * @work: pointer to work_struct containing our data
4640 **/
4641 static void ixgbe_fdir_reinit_task(struct work_struct *work)
4642 {
4643 struct ixgbe_adapter *adapter = container_of(work,
4644 struct ixgbe_adapter,
4645 fdir_reinit_task);
4646 struct ixgbe_hw *hw = &adapter->hw;
4647 int i;
4648
4649 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
4650 for (i = 0; i < adapter->num_tx_queues; i++)
4651 set_bit(__IXGBE_FDIR_INIT_DONE,
4652 &(adapter->tx_ring[i].reinit_state));
4653 } else {
4654 DPRINTK(PROBE, ERR, "failed to finish FDIR re-initialization, "
4655 "ignored adding FDIR ATR filters \n");
4656 }
4657 /* Done FDIR Re-initialization, enable transmits */
4658 netif_tx_start_all_queues(adapter->netdev);
4659 }
4660
4661 /**
4662 * ixgbe_watchdog_task - worker thread to bring link up
4663 * @work: pointer to work_struct containing our data
4664 **/
4665 static void ixgbe_watchdog_task(struct work_struct *work)
4666 {
4667 struct ixgbe_adapter *adapter = container_of(work,
4668 struct ixgbe_adapter,
4669 watchdog_task);
4670 struct net_device *netdev = adapter->netdev;
4671 struct ixgbe_hw *hw = &adapter->hw;
4672 u32 link_speed = adapter->link_speed;
4673 bool link_up = adapter->link_up;
4674 int i;
4675 struct ixgbe_ring *tx_ring;
4676 int some_tx_pending = 0;
4677
4678 adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
4679
4680 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
4681 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
4682 if (link_up) {
4683 #ifdef CONFIG_DCB
4684 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4685 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
4686 hw->mac.ops.fc_enable(hw, i);
4687 } else {
4688 hw->mac.ops.fc_enable(hw, 0);
4689 }
4690 #else
4691 hw->mac.ops.fc_enable(hw, 0);
4692 #endif
4693 }
4694
4695 if (link_up ||
4696 time_after(jiffies, (adapter->link_check_timeout +
4697 IXGBE_TRY_LINK_TIMEOUT))) {
4698 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
4699 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
4700 }
4701 adapter->link_up = link_up;
4702 adapter->link_speed = link_speed;
4703 }
4704
4705 if (link_up) {
4706 if (!netif_carrier_ok(netdev)) {
4707 bool flow_rx, flow_tx;
4708
4709 if (hw->mac.type == ixgbe_mac_82599EB) {
4710 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
4711 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
4712 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
4713 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
4714 } else {
4715 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4716 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
4717 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
4718 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
4719 }
4720
4721 printk(KERN_INFO "ixgbe: %s NIC Link is Up %s, "
4722 "Flow Control: %s\n",
4723 netdev->name,
4724 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
4725 "10 Gbps" :
4726 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
4727 "1 Gbps" : "unknown speed")),
4728 ((flow_rx && flow_tx) ? "RX/TX" :
4729 (flow_rx ? "RX" :
4730 (flow_tx ? "TX" : "None"))));
4731
4732 netif_carrier_on(netdev);
4733 } else {
4734 /* Force detection of hung controller */
4735 adapter->detect_tx_hung = true;
4736 }
4737 } else {
4738 adapter->link_up = false;
4739 adapter->link_speed = 0;
4740 if (netif_carrier_ok(netdev)) {
4741 printk(KERN_INFO "ixgbe: %s NIC Link is Down\n",
4742 netdev->name);
4743 netif_carrier_off(netdev);
4744 }
4745 }
4746
4747 if (!netif_carrier_ok(netdev)) {
4748 for (i = 0; i < adapter->num_tx_queues; i++) {
4749 tx_ring = &adapter->tx_ring[i];
4750 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
4751 some_tx_pending = 1;
4752 break;
4753 }
4754 }
4755
4756 if (some_tx_pending) {
4757 /* We've lost link, so the controller stops DMA,
4758 * but we've got queued Tx work that's never going
4759 * to get done, so reset controller to flush Tx.
4760 * (Do the reset outside of interrupt context).
4761 */
4762 schedule_work(&adapter->reset_task);
4763 }
4764 }
4765
4766 ixgbe_update_stats(adapter);
4767 adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
4768 }
4769
4770 static int ixgbe_tso(struct ixgbe_adapter *adapter,
4771 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
4772 u32 tx_flags, u8 *hdr_len)
4773 {
4774 struct ixgbe_adv_tx_context_desc *context_desc;
4775 unsigned int i;
4776 int err;
4777 struct ixgbe_tx_buffer *tx_buffer_info;
4778 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
4779 u32 mss_l4len_idx, l4len;
4780
4781 if (skb_is_gso(skb)) {
4782 if (skb_header_cloned(skb)) {
4783 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
4784 if (err)
4785 return err;
4786 }
4787 l4len = tcp_hdrlen(skb);
4788 *hdr_len += l4len;
4789
4790 if (skb->protocol == htons(ETH_P_IP)) {
4791 struct iphdr *iph = ip_hdr(skb);
4792 iph->tot_len = 0;
4793 iph->check = 0;
4794 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
4795 iph->daddr, 0,
4796 IPPROTO_TCP,
4797 0);
4798 adapter->hw_tso_ctxt++;
4799 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
4800 ipv6_hdr(skb)->payload_len = 0;
4801 tcp_hdr(skb)->check =
4802 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
4803 &ipv6_hdr(skb)->daddr,
4804 0, IPPROTO_TCP, 0);
4805 adapter->hw_tso6_ctxt++;
4806 }
4807
4808 i = tx_ring->next_to_use;
4809
4810 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4811 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4812
4813 /* VLAN MACLEN IPLEN */
4814 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4815 vlan_macip_lens |=
4816 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4817 vlan_macip_lens |= ((skb_network_offset(skb)) <<
4818 IXGBE_ADVTXD_MACLEN_SHIFT);
4819 *hdr_len += skb_network_offset(skb);
4820 vlan_macip_lens |=
4821 (skb_transport_header(skb) - skb_network_header(skb));
4822 *hdr_len +=
4823 (skb_transport_header(skb) - skb_network_header(skb));
4824 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4825 context_desc->seqnum_seed = 0;
4826
4827 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
4828 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
4829 IXGBE_ADVTXD_DTYP_CTXT);
4830
4831 if (skb->protocol == htons(ETH_P_IP))
4832 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4833 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
4834 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4835
4836 /* MSS L4LEN IDX */
4837 mss_l4len_idx =
4838 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
4839 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
4840 /* use index 1 for TSO */
4841 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4842 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
4843
4844 tx_buffer_info->time_stamp = jiffies;
4845 tx_buffer_info->next_to_watch = i;
4846
4847 i++;
4848 if (i == tx_ring->count)
4849 i = 0;
4850 tx_ring->next_to_use = i;
4851
4852 return true;
4853 }
4854 return false;
4855 }
4856
4857 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
4858 struct ixgbe_ring *tx_ring,
4859 struct sk_buff *skb, u32 tx_flags)
4860 {
4861 struct ixgbe_adv_tx_context_desc *context_desc;
4862 unsigned int i;
4863 struct ixgbe_tx_buffer *tx_buffer_info;
4864 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
4865
4866 if (skb->ip_summed == CHECKSUM_PARTIAL ||
4867 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
4868 i = tx_ring->next_to_use;
4869 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4870 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4871
4872 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4873 vlan_macip_lens |=
4874 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4875 vlan_macip_lens |= (skb_network_offset(skb) <<
4876 IXGBE_ADVTXD_MACLEN_SHIFT);
4877 if (skb->ip_summed == CHECKSUM_PARTIAL)
4878 vlan_macip_lens |= (skb_transport_header(skb) -
4879 skb_network_header(skb));
4880
4881 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4882 context_desc->seqnum_seed = 0;
4883
4884 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
4885 IXGBE_ADVTXD_DTYP_CTXT);
4886
4887 if (skb->ip_summed == CHECKSUM_PARTIAL) {
4888 switch (skb->protocol) {
4889 case cpu_to_be16(ETH_P_IP):
4890 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4891 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
4892 type_tucmd_mlhl |=
4893 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4894 else if (ip_hdr(skb)->protocol == IPPROTO_SCTP)
4895 type_tucmd_mlhl |=
4896 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4897 break;
4898 case cpu_to_be16(ETH_P_IPV6):
4899 /* XXX what about other V6 headers?? */
4900 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
4901 type_tucmd_mlhl |=
4902 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4903 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_SCTP)
4904 type_tucmd_mlhl |=
4905 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4906 break;
4907 default:
4908 if (unlikely(net_ratelimit())) {
4909 DPRINTK(PROBE, WARNING,
4910 "partial checksum but proto=%x!\n",
4911 skb->protocol);
4912 }
4913 break;
4914 }
4915 }
4916
4917 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4918 /* use index zero for tx checksum offload */
4919 context_desc->mss_l4len_idx = 0;
4920
4921 tx_buffer_info->time_stamp = jiffies;
4922 tx_buffer_info->next_to_watch = i;
4923
4924 adapter->hw_csum_tx_good++;
4925 i++;
4926 if (i == tx_ring->count)
4927 i = 0;
4928 tx_ring->next_to_use = i;
4929
4930 return true;
4931 }
4932
4933 return false;
4934 }
4935
4936 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
4937 struct ixgbe_ring *tx_ring,
4938 struct sk_buff *skb, u32 tx_flags,
4939 unsigned int first)
4940 {
4941 struct ixgbe_tx_buffer *tx_buffer_info;
4942 unsigned int len;
4943 unsigned int total = skb->len;
4944 unsigned int offset = 0, size, count = 0, i;
4945 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
4946 unsigned int f;
4947 dma_addr_t *map;
4948
4949 i = tx_ring->next_to_use;
4950
4951 if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
4952 dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
4953 return 0;
4954 }
4955
4956 map = skb_shinfo(skb)->dma_maps;
4957
4958 if (tx_flags & IXGBE_TX_FLAGS_FCOE)
4959 /* excluding fcoe_crc_eof for FCoE */
4960 total -= sizeof(struct fcoe_crc_eof);
4961
4962 len = min(skb_headlen(skb), total);
4963 while (len) {
4964 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4965 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
4966
4967 tx_buffer_info->length = size;
4968 tx_buffer_info->dma = skb_shinfo(skb)->dma_head + offset;
4969 tx_buffer_info->time_stamp = jiffies;
4970 tx_buffer_info->next_to_watch = i;
4971
4972 len -= size;
4973 total -= size;
4974 offset += size;
4975 count++;
4976
4977 if (len) {
4978 i++;
4979 if (i == tx_ring->count)
4980 i = 0;
4981 }
4982 }
4983
4984 for (f = 0; f < nr_frags; f++) {
4985 struct skb_frag_struct *frag;
4986
4987 frag = &skb_shinfo(skb)->frags[f];
4988 len = min((unsigned int)frag->size, total);
4989 offset = 0;
4990
4991 while (len) {
4992 i++;
4993 if (i == tx_ring->count)
4994 i = 0;
4995
4996 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4997 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
4998
4999 tx_buffer_info->length = size;
5000 tx_buffer_info->dma = map[f] + offset;
5001 tx_buffer_info->time_stamp = jiffies;
5002 tx_buffer_info->next_to_watch = i;
5003
5004 len -= size;
5005 total -= size;
5006 offset += size;
5007 count++;
5008 }
5009 if (total == 0)
5010 break;
5011 }
5012
5013 tx_ring->tx_buffer_info[i].skb = skb;
5014 tx_ring->tx_buffer_info[first].next_to_watch = i;
5015
5016 return count;
5017 }
5018
5019 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
5020 struct ixgbe_ring *tx_ring,
5021 int tx_flags, int count, u32 paylen, u8 hdr_len)
5022 {
5023 union ixgbe_adv_tx_desc *tx_desc = NULL;
5024 struct ixgbe_tx_buffer *tx_buffer_info;
5025 u32 olinfo_status = 0, cmd_type_len = 0;
5026 unsigned int i;
5027 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
5028
5029 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
5030
5031 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
5032
5033 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5034 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
5035
5036 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
5037 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
5038
5039 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
5040 IXGBE_ADVTXD_POPTS_SHIFT;
5041
5042 /* use index 1 context for tso */
5043 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
5044 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
5045 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
5046 IXGBE_ADVTXD_POPTS_SHIFT;
5047
5048 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
5049 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
5050 IXGBE_ADVTXD_POPTS_SHIFT;
5051
5052 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
5053 olinfo_status |= IXGBE_ADVTXD_CC;
5054 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
5055 if (tx_flags & IXGBE_TX_FLAGS_FSO)
5056 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
5057 }
5058
5059 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
5060
5061 i = tx_ring->next_to_use;
5062 while (count--) {
5063 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5064 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
5065 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
5066 tx_desc->read.cmd_type_len =
5067 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
5068 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
5069 i++;
5070 if (i == tx_ring->count)
5071 i = 0;
5072 }
5073
5074 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
5075
5076 /*
5077 * Force memory writes to complete before letting h/w
5078 * know there are new descriptors to fetch. (Only
5079 * applicable for weak-ordered memory model archs,
5080 * such as IA-64).
5081 */
5082 wmb();
5083
5084 tx_ring->next_to_use = i;
5085 writel(i, adapter->hw.hw_addr + tx_ring->tail);
5086 }
5087
5088 static void ixgbe_atr(struct ixgbe_adapter *adapter, struct sk_buff *skb,
5089 int queue, u32 tx_flags)
5090 {
5091 /* Right now, we support IPv4 only */
5092 struct ixgbe_atr_input atr_input;
5093 struct tcphdr *th;
5094 struct udphdr *uh;
5095 struct iphdr *iph = ip_hdr(skb);
5096 struct ethhdr *eth = (struct ethhdr *)skb->data;
5097 u16 vlan_id, src_port, dst_port, flex_bytes;
5098 u32 src_ipv4_addr, dst_ipv4_addr;
5099 u8 l4type = 0;
5100
5101 /* check if we're UDP or TCP */
5102 if (iph->protocol == IPPROTO_TCP) {
5103 th = tcp_hdr(skb);
5104 src_port = th->source;
5105 dst_port = th->dest;
5106 l4type |= IXGBE_ATR_L4TYPE_TCP;
5107 /* l4type IPv4 type is 0, no need to assign */
5108 } else if(iph->protocol == IPPROTO_UDP) {
5109 uh = udp_hdr(skb);
5110 src_port = uh->source;
5111 dst_port = uh->dest;
5112 l4type |= IXGBE_ATR_L4TYPE_UDP;
5113 /* l4type IPv4 type is 0, no need to assign */
5114 } else {
5115 /* Unsupported L4 header, just bail here */
5116 return;
5117 }
5118
5119 memset(&atr_input, 0, sizeof(struct ixgbe_atr_input));
5120
5121 vlan_id = (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK) >>
5122 IXGBE_TX_FLAGS_VLAN_SHIFT;
5123 src_ipv4_addr = iph->saddr;
5124 dst_ipv4_addr = iph->daddr;
5125 flex_bytes = eth->h_proto;
5126
5127 ixgbe_atr_set_vlan_id_82599(&atr_input, vlan_id);
5128 ixgbe_atr_set_src_port_82599(&atr_input, dst_port);
5129 ixgbe_atr_set_dst_port_82599(&atr_input, src_port);
5130 ixgbe_atr_set_flex_byte_82599(&atr_input, flex_bytes);
5131 ixgbe_atr_set_l4type_82599(&atr_input, l4type);
5132 /* src and dst are inverted, think how the receiver sees them */
5133 ixgbe_atr_set_src_ipv4_82599(&atr_input, dst_ipv4_addr);
5134 ixgbe_atr_set_dst_ipv4_82599(&atr_input, src_ipv4_addr);
5135
5136 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
5137 ixgbe_fdir_add_signature_filter_82599(&adapter->hw, &atr_input, queue);
5138 }
5139
5140 static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
5141 struct ixgbe_ring *tx_ring, int size)
5142 {
5143 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5144
5145 netif_stop_subqueue(netdev, tx_ring->queue_index);
5146 /* Herbert's original patch had:
5147 * smp_mb__after_netif_stop_queue();
5148 * but since that doesn't exist yet, just open code it. */
5149 smp_mb();
5150
5151 /* We need to check again in a case another CPU has just
5152 * made room available. */
5153 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
5154 return -EBUSY;
5155
5156 /* A reprieve! - use start_queue because it doesn't call schedule */
5157 netif_start_subqueue(netdev, tx_ring->queue_index);
5158 ++adapter->restart_queue;
5159 return 0;
5160 }
5161
5162 static int ixgbe_maybe_stop_tx(struct net_device *netdev,
5163 struct ixgbe_ring *tx_ring, int size)
5164 {
5165 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
5166 return 0;
5167 return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
5168 }
5169
5170 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
5171 {
5172 struct ixgbe_adapter *adapter = netdev_priv(dev);
5173
5174 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
5175 return smp_processor_id();
5176
5177 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
5178 return (skb->vlan_tci & IXGBE_TX_FLAGS_VLAN_PRIO_MASK) >> 13;
5179
5180 return skb_tx_hash(dev, skb);
5181 }
5182
5183 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
5184 struct net_device *netdev)
5185 {
5186 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5187 struct ixgbe_ring *tx_ring;
5188 unsigned int first;
5189 unsigned int tx_flags = 0;
5190 u8 hdr_len = 0;
5191 int r_idx = 0, tso;
5192 int count = 0;
5193 unsigned int f;
5194
5195 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
5196 tx_flags |= vlan_tx_tag_get(skb);
5197 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5198 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
5199 tx_flags |= (skb->queue_mapping << 13);
5200 }
5201 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
5202 tx_flags |= IXGBE_TX_FLAGS_VLAN;
5203 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5204 if (skb->priority != TC_PRIO_CONTROL) {
5205 tx_flags |= (skb->queue_mapping << 13);
5206 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
5207 tx_flags |= IXGBE_TX_FLAGS_VLAN;
5208 } else {
5209 skb->queue_mapping =
5210 adapter->ring_feature[RING_F_DCB].indices-1;
5211 }
5212 }
5213
5214 r_idx = skb->queue_mapping;
5215 tx_ring = &adapter->tx_ring[r_idx];
5216
5217 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
5218 (skb->protocol == htons(ETH_P_FCOE))) {
5219 tx_flags |= IXGBE_TX_FLAGS_FCOE;
5220 #ifdef IXGBE_FCOE
5221 r_idx = smp_processor_id();
5222 r_idx &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
5223 r_idx += adapter->ring_feature[RING_F_FCOE].mask;
5224 tx_ring = &adapter->tx_ring[r_idx];
5225 #endif
5226 }
5227 /* four things can cause us to need a context descriptor */
5228 if (skb_is_gso(skb) ||
5229 (skb->ip_summed == CHECKSUM_PARTIAL) ||
5230 (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
5231 (tx_flags & IXGBE_TX_FLAGS_FCOE))
5232 count++;
5233
5234 count += TXD_USE_COUNT(skb_headlen(skb));
5235 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
5236 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
5237
5238 if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
5239 adapter->tx_busy++;
5240 return NETDEV_TX_BUSY;
5241 }
5242
5243 first = tx_ring->next_to_use;
5244 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
5245 #ifdef IXGBE_FCOE
5246 /* setup tx offload for FCoE */
5247 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
5248 if (tso < 0) {
5249 dev_kfree_skb_any(skb);
5250 return NETDEV_TX_OK;
5251 }
5252 if (tso)
5253 tx_flags |= IXGBE_TX_FLAGS_FSO;
5254 #endif /* IXGBE_FCOE */
5255 } else {
5256 if (skb->protocol == htons(ETH_P_IP))
5257 tx_flags |= IXGBE_TX_FLAGS_IPV4;
5258 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
5259 if (tso < 0) {
5260 dev_kfree_skb_any(skb);
5261 return NETDEV_TX_OK;
5262 }
5263
5264 if (tso)
5265 tx_flags |= IXGBE_TX_FLAGS_TSO;
5266 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
5267 (skb->ip_summed == CHECKSUM_PARTIAL))
5268 tx_flags |= IXGBE_TX_FLAGS_CSUM;
5269 }
5270
5271 count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first);
5272 if (count) {
5273 /* add the ATR filter if ATR is on */
5274 if (tx_ring->atr_sample_rate) {
5275 ++tx_ring->atr_count;
5276 if ((tx_ring->atr_count >= tx_ring->atr_sample_rate) &&
5277 test_bit(__IXGBE_FDIR_INIT_DONE,
5278 &tx_ring->reinit_state)) {
5279 ixgbe_atr(adapter, skb, tx_ring->queue_index,
5280 tx_flags);
5281 tx_ring->atr_count = 0;
5282 }
5283 }
5284 ixgbe_tx_queue(adapter, tx_ring, tx_flags, count, skb->len,
5285 hdr_len);
5286 ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
5287
5288 } else {
5289 dev_kfree_skb_any(skb);
5290 tx_ring->tx_buffer_info[first].time_stamp = 0;
5291 tx_ring->next_to_use = first;
5292 }
5293
5294 return NETDEV_TX_OK;
5295 }
5296
5297 /**
5298 * ixgbe_get_stats - Get System Network Statistics
5299 * @netdev: network interface device structure
5300 *
5301 * Returns the address of the device statistics structure.
5302 * The statistics are actually updated from the timer callback.
5303 **/
5304 static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
5305 {
5306 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5307
5308 /* only return the current stats */
5309 return &adapter->net_stats;
5310 }
5311
5312 /**
5313 * ixgbe_set_mac - Change the Ethernet Address of the NIC
5314 * @netdev: network interface device structure
5315 * @p: pointer to an address structure
5316 *
5317 * Returns 0 on success, negative on failure
5318 **/
5319 static int ixgbe_set_mac(struct net_device *netdev, void *p)
5320 {
5321 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5322 struct ixgbe_hw *hw = &adapter->hw;
5323 struct sockaddr *addr = p;
5324
5325 if (!is_valid_ether_addr(addr->sa_data))
5326 return -EADDRNOTAVAIL;
5327
5328 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
5329 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
5330
5331 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
5332
5333 return 0;
5334 }
5335
5336 static int
5337 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
5338 {
5339 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5340 struct ixgbe_hw *hw = &adapter->hw;
5341 u16 value;
5342 int rc;
5343
5344 if (prtad != hw->phy.mdio.prtad)
5345 return -EINVAL;
5346 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
5347 if (!rc)
5348 rc = value;
5349 return rc;
5350 }
5351
5352 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
5353 u16 addr, u16 value)
5354 {
5355 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5356 struct ixgbe_hw *hw = &adapter->hw;
5357
5358 if (prtad != hw->phy.mdio.prtad)
5359 return -EINVAL;
5360 return hw->phy.ops.write_reg(hw, addr, devad, value);
5361 }
5362
5363 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
5364 {
5365 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5366
5367 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
5368 }
5369
5370 /**
5371 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
5372 * netdev->dev_addrs
5373 * @netdev: network interface device structure
5374 *
5375 * Returns non-zero on failure
5376 **/
5377 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
5378 {
5379 int err = 0;
5380 struct ixgbe_adapter *adapter = netdev_priv(dev);
5381 struct ixgbe_mac_info *mac = &adapter->hw.mac;
5382
5383 if (is_valid_ether_addr(mac->san_addr)) {
5384 rtnl_lock();
5385 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
5386 rtnl_unlock();
5387 }
5388 return err;
5389 }
5390
5391 /**
5392 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
5393 * netdev->dev_addrs
5394 * @netdev: network interface device structure
5395 *
5396 * Returns non-zero on failure
5397 **/
5398 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
5399 {
5400 int err = 0;
5401 struct ixgbe_adapter *adapter = netdev_priv(dev);
5402 struct ixgbe_mac_info *mac = &adapter->hw.mac;
5403
5404 if (is_valid_ether_addr(mac->san_addr)) {
5405 rtnl_lock();
5406 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
5407 rtnl_unlock();
5408 }
5409 return err;
5410 }
5411
5412 #ifdef CONFIG_NET_POLL_CONTROLLER
5413 /*
5414 * Polling 'interrupt' - used by things like netconsole to send skbs
5415 * without having to re-enable interrupts. It's not called while
5416 * the interrupt routine is executing.
5417 */
5418 static void ixgbe_netpoll(struct net_device *netdev)
5419 {
5420 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5421 int i;
5422
5423 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
5424 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
5425 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
5426 for (i = 0; i < num_q_vectors; i++) {
5427 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
5428 ixgbe_msix_clean_many(0, q_vector);
5429 }
5430 } else {
5431 ixgbe_intr(adapter->pdev->irq, netdev);
5432 }
5433 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
5434 }
5435 #endif
5436
5437 static const struct net_device_ops ixgbe_netdev_ops = {
5438 .ndo_open = ixgbe_open,
5439 .ndo_stop = ixgbe_close,
5440 .ndo_start_xmit = ixgbe_xmit_frame,
5441 .ndo_select_queue = ixgbe_select_queue,
5442 .ndo_get_stats = ixgbe_get_stats,
5443 .ndo_set_rx_mode = ixgbe_set_rx_mode,
5444 .ndo_set_multicast_list = ixgbe_set_rx_mode,
5445 .ndo_validate_addr = eth_validate_addr,
5446 .ndo_set_mac_address = ixgbe_set_mac,
5447 .ndo_change_mtu = ixgbe_change_mtu,
5448 .ndo_tx_timeout = ixgbe_tx_timeout,
5449 .ndo_vlan_rx_register = ixgbe_vlan_rx_register,
5450 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
5451 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
5452 .ndo_do_ioctl = ixgbe_ioctl,
5453 #ifdef CONFIG_NET_POLL_CONTROLLER
5454 .ndo_poll_controller = ixgbe_netpoll,
5455 #endif
5456 #ifdef IXGBE_FCOE
5457 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
5458 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
5459 .ndo_fcoe_enable = ixgbe_fcoe_enable,
5460 .ndo_fcoe_disable = ixgbe_fcoe_disable,
5461 #endif /* IXGBE_FCOE */
5462 };
5463
5464 /**
5465 * ixgbe_probe - Device Initialization Routine
5466 * @pdev: PCI device information struct
5467 * @ent: entry in ixgbe_pci_tbl
5468 *
5469 * Returns 0 on success, negative on failure
5470 *
5471 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
5472 * The OS initialization, configuring of the adapter private structure,
5473 * and a hardware reset occur.
5474 **/
5475 static int __devinit ixgbe_probe(struct pci_dev *pdev,
5476 const struct pci_device_id *ent)
5477 {
5478 struct net_device *netdev;
5479 struct ixgbe_adapter *adapter = NULL;
5480 struct ixgbe_hw *hw;
5481 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
5482 static int cards_found;
5483 int i, err, pci_using_dac;
5484 #ifdef IXGBE_FCOE
5485 u16 device_caps;
5486 #endif
5487 u32 part_num, eec;
5488
5489 err = pci_enable_device_mem(pdev);
5490 if (err)
5491 return err;
5492
5493 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) &&
5494 !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
5495 pci_using_dac = 1;
5496 } else {
5497 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5498 if (err) {
5499 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5500 if (err) {
5501 dev_err(&pdev->dev, "No usable DMA "
5502 "configuration, aborting\n");
5503 goto err_dma;
5504 }
5505 }
5506 pci_using_dac = 0;
5507 }
5508
5509 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
5510 IORESOURCE_MEM), ixgbe_driver_name);
5511 if (err) {
5512 dev_err(&pdev->dev,
5513 "pci_request_selected_regions failed 0x%x\n", err);
5514 goto err_pci_reg;
5515 }
5516
5517 err = pci_enable_pcie_error_reporting(pdev);
5518 if (err) {
5519 dev_err(&pdev->dev, "pci_enable_pcie_error_reporting failed "
5520 "0x%x\n", err);
5521 /* non-fatal, continue */
5522 }
5523
5524 pci_set_master(pdev);
5525 pci_save_state(pdev);
5526
5527 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES);
5528 if (!netdev) {
5529 err = -ENOMEM;
5530 goto err_alloc_etherdev;
5531 }
5532
5533 SET_NETDEV_DEV(netdev, &pdev->dev);
5534
5535 pci_set_drvdata(pdev, netdev);
5536 adapter = netdev_priv(netdev);
5537
5538 adapter->netdev = netdev;
5539 adapter->pdev = pdev;
5540 hw = &adapter->hw;
5541 hw->back = adapter;
5542 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
5543
5544 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
5545 pci_resource_len(pdev, 0));
5546 if (!hw->hw_addr) {
5547 err = -EIO;
5548 goto err_ioremap;
5549 }
5550
5551 for (i = 1; i <= 5; i++) {
5552 if (pci_resource_len(pdev, i) == 0)
5553 continue;
5554 }
5555
5556 netdev->netdev_ops = &ixgbe_netdev_ops;
5557 ixgbe_set_ethtool_ops(netdev);
5558 netdev->watchdog_timeo = 5 * HZ;
5559 strcpy(netdev->name, pci_name(pdev));
5560
5561 adapter->bd_number = cards_found;
5562
5563 /* Setup hw api */
5564 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
5565 hw->mac.type = ii->mac;
5566
5567 /* EEPROM */
5568 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
5569 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
5570 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
5571 if (!(eec & (1 << 8)))
5572 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
5573
5574 /* PHY */
5575 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
5576 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
5577 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
5578 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
5579 hw->phy.mdio.mmds = 0;
5580 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
5581 hw->phy.mdio.dev = netdev;
5582 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
5583 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
5584
5585 /* set up this timer and work struct before calling get_invariants
5586 * which might start the timer
5587 */
5588 init_timer(&adapter->sfp_timer);
5589 adapter->sfp_timer.function = &ixgbe_sfp_timer;
5590 adapter->sfp_timer.data = (unsigned long) adapter;
5591
5592 INIT_WORK(&adapter->sfp_task, ixgbe_sfp_task);
5593
5594 /* multispeed fiber has its own tasklet, called from GPI SDP1 context */
5595 INIT_WORK(&adapter->multispeed_fiber_task, ixgbe_multispeed_fiber_task);
5596
5597 /* a new SFP+ module arrival, called from GPI SDP2 context */
5598 INIT_WORK(&adapter->sfp_config_module_task,
5599 ixgbe_sfp_config_module_task);
5600
5601 ii->get_invariants(hw);
5602
5603 /* setup the private structure */
5604 err = ixgbe_sw_init(adapter);
5605 if (err)
5606 goto err_sw_init;
5607
5608 /*
5609 * If there is a fan on this device and it has failed log the
5610 * failure.
5611 */
5612 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
5613 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
5614 if (esdp & IXGBE_ESDP_SDP1)
5615 DPRINTK(PROBE, CRIT,
5616 "Fan has stopped, replace the adapter\n");
5617 }
5618
5619 /* reset_hw fills in the perm_addr as well */
5620 err = hw->mac.ops.reset_hw(hw);
5621 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
5622 hw->mac.type == ixgbe_mac_82598EB) {
5623 /*
5624 * Start a kernel thread to watch for a module to arrive.
5625 * Only do this for 82598, since 82599 will generate
5626 * interrupts on module arrival.
5627 */
5628 set_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5629 mod_timer(&adapter->sfp_timer,
5630 round_jiffies(jiffies + (2 * HZ)));
5631 err = 0;
5632 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5633 dev_err(&adapter->pdev->dev, "failed to initialize because "
5634 "an unsupported SFP+ module type was detected.\n"
5635 "Reload the driver after installing a supported "
5636 "module.\n");
5637 goto err_sw_init;
5638 } else if (err) {
5639 dev_err(&adapter->pdev->dev, "HW Init failed: %d\n", err);
5640 goto err_sw_init;
5641 }
5642
5643 netdev->features = NETIF_F_SG |
5644 NETIF_F_IP_CSUM |
5645 NETIF_F_HW_VLAN_TX |
5646 NETIF_F_HW_VLAN_RX |
5647 NETIF_F_HW_VLAN_FILTER;
5648
5649 netdev->features |= NETIF_F_IPV6_CSUM;
5650 netdev->features |= NETIF_F_TSO;
5651 netdev->features |= NETIF_F_TSO6;
5652 netdev->features |= NETIF_F_GRO;
5653
5654 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
5655 netdev->features |= NETIF_F_SCTP_CSUM;
5656
5657 netdev->vlan_features |= NETIF_F_TSO;
5658 netdev->vlan_features |= NETIF_F_TSO6;
5659 netdev->vlan_features |= NETIF_F_IP_CSUM;
5660 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
5661 netdev->vlan_features |= NETIF_F_SG;
5662
5663 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
5664 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
5665
5666 #ifdef CONFIG_IXGBE_DCB
5667 netdev->dcbnl_ops = &dcbnl_ops;
5668 #endif
5669
5670 #ifdef IXGBE_FCOE
5671 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
5672 if (hw->mac.ops.get_device_caps) {
5673 hw->mac.ops.get_device_caps(hw, &device_caps);
5674 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
5675 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
5676 }
5677 }
5678 #endif /* IXGBE_FCOE */
5679 if (pci_using_dac)
5680 netdev->features |= NETIF_F_HIGHDMA;
5681
5682 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
5683 netdev->features |= NETIF_F_LRO;
5684
5685 /* make sure the EEPROM is good */
5686 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
5687 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
5688 err = -EIO;
5689 goto err_eeprom;
5690 }
5691
5692 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
5693 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
5694
5695 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
5696 dev_err(&pdev->dev, "invalid MAC address\n");
5697 err = -EIO;
5698 goto err_eeprom;
5699 }
5700
5701 init_timer(&adapter->watchdog_timer);
5702 adapter->watchdog_timer.function = &ixgbe_watchdog;
5703 adapter->watchdog_timer.data = (unsigned long)adapter;
5704
5705 INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
5706 INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
5707
5708 err = ixgbe_init_interrupt_scheme(adapter);
5709 if (err)
5710 goto err_sw_init;
5711
5712 switch (pdev->device) {
5713 case IXGBE_DEV_ID_82599_KX4:
5714 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
5715 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
5716 /* Enable ACPI wakeup in GRC */
5717 IXGBE_WRITE_REG(hw, IXGBE_GRC,
5718 (IXGBE_READ_REG(hw, IXGBE_GRC) & ~IXGBE_GRC_APME));
5719 break;
5720 default:
5721 adapter->wol = 0;
5722 break;
5723 }
5724 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
5725
5726 /* pick up the PCI bus settings for reporting later */
5727 hw->mac.ops.get_bus_info(hw);
5728
5729 /* print bus type/speed/width info */
5730 dev_info(&pdev->dev, "(PCI Express:%s:%s) %pM\n",
5731 ((hw->bus.speed == ixgbe_bus_speed_5000) ? "5.0Gb/s":
5732 (hw->bus.speed == ixgbe_bus_speed_2500) ? "2.5Gb/s":"Unknown"),
5733 ((hw->bus.width == ixgbe_bus_width_pcie_x8) ? "Width x8" :
5734 (hw->bus.width == ixgbe_bus_width_pcie_x4) ? "Width x4" :
5735 (hw->bus.width == ixgbe_bus_width_pcie_x1) ? "Width x1" :
5736 "Unknown"),
5737 netdev->dev_addr);
5738 ixgbe_read_pba_num_generic(hw, &part_num);
5739 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
5740 dev_info(&pdev->dev, "MAC: %d, PHY: %d, SFP+: %d, PBA No: %06x-%03x\n",
5741 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
5742 (part_num >> 8), (part_num & 0xff));
5743 else
5744 dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
5745 hw->mac.type, hw->phy.type,
5746 (part_num >> 8), (part_num & 0xff));
5747
5748 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
5749 dev_warn(&pdev->dev, "PCI-Express bandwidth available for "
5750 "this card is not sufficient for optimal "
5751 "performance.\n");
5752 dev_warn(&pdev->dev, "For optimal performance a x8 "
5753 "PCI-Express slot is required.\n");
5754 }
5755
5756 /* save off EEPROM version number */
5757 hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
5758
5759 /* reset the hardware with the new settings */
5760 err = hw->mac.ops.start_hw(hw);
5761
5762 if (err == IXGBE_ERR_EEPROM_VERSION) {
5763 /* We are running on a pre-production device, log a warning */
5764 dev_warn(&pdev->dev, "This device is a pre-production "
5765 "adapter/LOM. Please be aware there may be issues "
5766 "associated with your hardware. If you are "
5767 "experiencing problems please contact your Intel or "
5768 "hardware representative who provided you with this "
5769 "hardware.\n");
5770 }
5771 strcpy(netdev->name, "eth%d");
5772 err = register_netdev(netdev);
5773 if (err)
5774 goto err_register;
5775
5776 /* carrier off reporting is important to ethtool even BEFORE open */
5777 netif_carrier_off(netdev);
5778
5779 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
5780 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
5781 INIT_WORK(&adapter->fdir_reinit_task, ixgbe_fdir_reinit_task);
5782
5783 #ifdef CONFIG_IXGBE_DCA
5784 if (dca_add_requester(&pdev->dev) == 0) {
5785 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
5786 ixgbe_setup_dca(adapter);
5787 }
5788 #endif
5789 /* add san mac addr to netdev */
5790 ixgbe_add_sanmac_netdev(netdev);
5791
5792 dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
5793 cards_found++;
5794 return 0;
5795
5796 err_register:
5797 ixgbe_release_hw_control(adapter);
5798 ixgbe_clear_interrupt_scheme(adapter);
5799 err_sw_init:
5800 err_eeprom:
5801 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5802 del_timer_sync(&adapter->sfp_timer);
5803 cancel_work_sync(&adapter->sfp_task);
5804 cancel_work_sync(&adapter->multispeed_fiber_task);
5805 cancel_work_sync(&adapter->sfp_config_module_task);
5806 iounmap(hw->hw_addr);
5807 err_ioremap:
5808 free_netdev(netdev);
5809 err_alloc_etherdev:
5810 pci_release_selected_regions(pdev, pci_select_bars(pdev,
5811 IORESOURCE_MEM));
5812 err_pci_reg:
5813 err_dma:
5814 pci_disable_device(pdev);
5815 return err;
5816 }
5817
5818 /**
5819 * ixgbe_remove - Device Removal Routine
5820 * @pdev: PCI device information struct
5821 *
5822 * ixgbe_remove is called by the PCI subsystem to alert the driver
5823 * that it should release a PCI device. The could be caused by a
5824 * Hot-Plug event, or because the driver is going to be removed from
5825 * memory.
5826 **/
5827 static void __devexit ixgbe_remove(struct pci_dev *pdev)
5828 {
5829 struct net_device *netdev = pci_get_drvdata(pdev);
5830 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5831 int err;
5832
5833 set_bit(__IXGBE_DOWN, &adapter->state);
5834 /* clear the module not found bit to make sure the worker won't
5835 * reschedule
5836 */
5837 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5838 del_timer_sync(&adapter->watchdog_timer);
5839
5840 del_timer_sync(&adapter->sfp_timer);
5841 cancel_work_sync(&adapter->watchdog_task);
5842 cancel_work_sync(&adapter->sfp_task);
5843 cancel_work_sync(&adapter->multispeed_fiber_task);
5844 cancel_work_sync(&adapter->sfp_config_module_task);
5845 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
5846 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
5847 cancel_work_sync(&adapter->fdir_reinit_task);
5848 flush_scheduled_work();
5849
5850 #ifdef CONFIG_IXGBE_DCA
5851 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
5852 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
5853 dca_remove_requester(&pdev->dev);
5854 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
5855 }
5856
5857 #endif
5858 #ifdef IXGBE_FCOE
5859 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
5860 ixgbe_cleanup_fcoe(adapter);
5861
5862 #endif /* IXGBE_FCOE */
5863
5864 /* remove the added san mac */
5865 ixgbe_del_sanmac_netdev(netdev);
5866
5867 if (netdev->reg_state == NETREG_REGISTERED)
5868 unregister_netdev(netdev);
5869
5870 ixgbe_clear_interrupt_scheme(adapter);
5871
5872 ixgbe_release_hw_control(adapter);
5873
5874 iounmap(adapter->hw.hw_addr);
5875 pci_release_selected_regions(pdev, pci_select_bars(pdev,
5876 IORESOURCE_MEM));
5877
5878 DPRINTK(PROBE, INFO, "complete\n");
5879
5880 free_netdev(netdev);
5881
5882 err = pci_disable_pcie_error_reporting(pdev);
5883 if (err)
5884 dev_err(&pdev->dev,
5885 "pci_disable_pcie_error_reporting failed 0x%x\n", err);
5886
5887 pci_disable_device(pdev);
5888 }
5889
5890 /**
5891 * ixgbe_io_error_detected - called when PCI error is detected
5892 * @pdev: Pointer to PCI device
5893 * @state: The current pci connection state
5894 *
5895 * This function is called after a PCI bus error affecting
5896 * this device has been detected.
5897 */
5898 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
5899 pci_channel_state_t state)
5900 {
5901 struct net_device *netdev = pci_get_drvdata(pdev);
5902 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5903
5904 netif_device_detach(netdev);
5905
5906 if (state == pci_channel_io_perm_failure)
5907 return PCI_ERS_RESULT_DISCONNECT;
5908
5909 if (netif_running(netdev))
5910 ixgbe_down(adapter);
5911 pci_disable_device(pdev);
5912
5913 /* Request a slot reset. */
5914 return PCI_ERS_RESULT_NEED_RESET;
5915 }
5916
5917 /**
5918 * ixgbe_io_slot_reset - called after the pci bus has been reset.
5919 * @pdev: Pointer to PCI device
5920 *
5921 * Restart the card from scratch, as if from a cold-boot.
5922 */
5923 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
5924 {
5925 struct net_device *netdev = pci_get_drvdata(pdev);
5926 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5927 pci_ers_result_t result;
5928 int err;
5929
5930 if (pci_enable_device_mem(pdev)) {
5931 DPRINTK(PROBE, ERR,
5932 "Cannot re-enable PCI device after reset.\n");
5933 result = PCI_ERS_RESULT_DISCONNECT;
5934 } else {
5935 pci_set_master(pdev);
5936 pci_restore_state(pdev);
5937
5938 pci_wake_from_d3(pdev, false);
5939
5940 ixgbe_reset(adapter);
5941 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5942 result = PCI_ERS_RESULT_RECOVERED;
5943 }
5944
5945 err = pci_cleanup_aer_uncorrect_error_status(pdev);
5946 if (err) {
5947 dev_err(&pdev->dev,
5948 "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n", err);
5949 /* non-fatal, continue */
5950 }
5951
5952 return result;
5953 }
5954
5955 /**
5956 * ixgbe_io_resume - called when traffic can start flowing again.
5957 * @pdev: Pointer to PCI device
5958 *
5959 * This callback is called when the error recovery driver tells us that
5960 * its OK to resume normal operation.
5961 */
5962 static void ixgbe_io_resume(struct pci_dev *pdev)
5963 {
5964 struct net_device *netdev = pci_get_drvdata(pdev);
5965 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5966
5967 if (netif_running(netdev)) {
5968 if (ixgbe_up(adapter)) {
5969 DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
5970 return;
5971 }
5972 }
5973
5974 netif_device_attach(netdev);
5975 }
5976
5977 static struct pci_error_handlers ixgbe_err_handler = {
5978 .error_detected = ixgbe_io_error_detected,
5979 .slot_reset = ixgbe_io_slot_reset,
5980 .resume = ixgbe_io_resume,
5981 };
5982
5983 static struct pci_driver ixgbe_driver = {
5984 .name = ixgbe_driver_name,
5985 .id_table = ixgbe_pci_tbl,
5986 .probe = ixgbe_probe,
5987 .remove = __devexit_p(ixgbe_remove),
5988 #ifdef CONFIG_PM
5989 .suspend = ixgbe_suspend,
5990 .resume = ixgbe_resume,
5991 #endif
5992 .shutdown = ixgbe_shutdown,
5993 .err_handler = &ixgbe_err_handler
5994 };
5995
5996 /**
5997 * ixgbe_init_module - Driver Registration Routine
5998 *
5999 * ixgbe_init_module is the first routine called when the driver is
6000 * loaded. All it does is register with the PCI subsystem.
6001 **/
6002 static int __init ixgbe_init_module(void)
6003 {
6004 int ret;
6005 printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
6006 ixgbe_driver_string, ixgbe_driver_version);
6007
6008 printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
6009
6010 #ifdef CONFIG_IXGBE_DCA
6011 dca_register_notify(&dca_notifier);
6012 #endif
6013
6014 ret = pci_register_driver(&ixgbe_driver);
6015 return ret;
6016 }
6017
6018 module_init(ixgbe_init_module);
6019
6020 /**
6021 * ixgbe_exit_module - Driver Exit Cleanup Routine
6022 *
6023 * ixgbe_exit_module is called just before the driver is removed
6024 * from memory.
6025 **/
6026 static void __exit ixgbe_exit_module(void)
6027 {
6028 #ifdef CONFIG_IXGBE_DCA
6029 dca_unregister_notify(&dca_notifier);
6030 #endif
6031 pci_unregister_driver(&ixgbe_driver);
6032 }
6033
6034 #ifdef CONFIG_IXGBE_DCA
6035 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
6036 void *p)
6037 {
6038 int ret_val;
6039
6040 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
6041 __ixgbe_notify_dca);
6042
6043 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
6044 }
6045
6046 #endif /* CONFIG_IXGBE_DCA */
6047 #ifdef DEBUG
6048 /**
6049 * ixgbe_get_hw_dev_name - return device name string
6050 * used by hardware layer to print debugging information
6051 **/
6052 char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw)
6053 {
6054 struct ixgbe_adapter *adapter = hw->back;
6055 return adapter->netdev->name;
6056 }
6057
6058 #endif
6059 module_exit(ixgbe_exit_module);
6060
6061 /* ixgbe_main.c */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree