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Save sram context after changing MPU, DSP or core clocks
[linux-ginger.git] / drivers / net / ixgbe / ixgbe_main.c
blobcbb143ca1eb88386d03209cb6b92d5b2936450d4
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_KX4_MEZZ),
101 board_82599 },
102 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4),
103 board_82599 },
104 {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE),
105 board_82599 },
106
107 /* required last entry */
108 {0, }
109 };
110 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
111
112 #ifdef CONFIG_IXGBE_DCA
113 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
114 void *p);
115 static struct notifier_block dca_notifier = {
116 .notifier_call = ixgbe_notify_dca,
117 .next = NULL,
118 .priority = 0
119 };
120 #endif
121
122 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
123 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
124 MODULE_LICENSE("GPL");
125 MODULE_VERSION(DRV_VERSION);
126
127 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
128
129 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
130 {
131 u32 ctrl_ext;
132
133 /* Let firmware take over control of h/w */
134 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
135 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
136 ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
137 }
138
139 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
140 {
141 u32 ctrl_ext;
142
143 /* Let firmware know the driver has taken over */
144 ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
145 IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
146 ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
147 }
148
149 /*
150 * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
151 * @adapter: pointer to adapter struct
152 * @direction: 0 for Rx, 1 for Tx, -1 for other causes
153 * @queue: queue to map the corresponding interrupt to
154 * @msix_vector: the vector to map to the corresponding queue
155 *
156 */
157 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
158 u8 queue, u8 msix_vector)
159 {
160 u32 ivar, index;
161 struct ixgbe_hw *hw = &adapter->hw;
162 switch (hw->mac.type) {
163 case ixgbe_mac_82598EB:
164 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
165 if (direction == -1)
166 direction = 0;
167 index = (((direction * 64) + queue) >> 2) & 0x1F;
168 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
169 ivar &= ~(0xFF << (8 * (queue & 0x3)));
170 ivar |= (msix_vector << (8 * (queue & 0x3)));
171 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
172 break;
173 case ixgbe_mac_82599EB:
174 if (direction == -1) {
175 /* other causes */
176 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
177 index = ((queue & 1) * 8);
178 ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
179 ivar &= ~(0xFF << index);
180 ivar |= (msix_vector << index);
181 IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
182 break;
183 } else {
184 /* tx or rx causes */
185 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
186 index = ((16 * (queue & 1)) + (8 * direction));
187 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
188 ivar &= ~(0xFF << index);
189 ivar |= (msix_vector << index);
190 IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
191 break;
192 }
193 default:
194 break;
195 }
196 }
197
198 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
199 u64 qmask)
200 {
201 u32 mask;
202
203 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
204 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
205 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
206 } else {
207 mask = (qmask & 0xFFFFFFFF);
208 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
209 mask = (qmask >> 32);
210 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
211 }
212 }
213
214 static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
215 struct ixgbe_tx_buffer
216 *tx_buffer_info)
217 {
218 tx_buffer_info->dma = 0;
219 if (tx_buffer_info->skb) {
220 skb_dma_unmap(&adapter->pdev->dev, tx_buffer_info->skb,
221 DMA_TO_DEVICE);
222 dev_kfree_skb_any(tx_buffer_info->skb);
223 tx_buffer_info->skb = NULL;
224 }
225 tx_buffer_info->time_stamp = 0;
226 /* tx_buffer_info must be completely set up in the transmit path */
227 }
228
229 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
230 struct ixgbe_ring *tx_ring,
231 unsigned int eop)
232 {
233 struct ixgbe_hw *hw = &adapter->hw;
234
235 /* Detect a transmit hang in hardware, this serializes the
236 * check with the clearing of time_stamp and movement of eop */
237 adapter->detect_tx_hung = false;
238 if (tx_ring->tx_buffer_info[eop].time_stamp &&
239 time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
240 !(IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & IXGBE_TFCS_TXOFF)) {
241 /* detected Tx unit hang */
242 union ixgbe_adv_tx_desc *tx_desc;
243 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
244 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
245 " Tx Queue <%d>\n"
246 " TDH, TDT <%x>, <%x>\n"
247 " next_to_use <%x>\n"
248 " next_to_clean <%x>\n"
249 "tx_buffer_info[next_to_clean]\n"
250 " time_stamp <%lx>\n"
251 " jiffies <%lx>\n",
252 tx_ring->queue_index,
253 IXGBE_READ_REG(hw, tx_ring->head),
254 IXGBE_READ_REG(hw, tx_ring->tail),
255 tx_ring->next_to_use, eop,
256 tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
257 return true;
258 }
259
260 return false;
261 }
262
263 #define IXGBE_MAX_TXD_PWR 14
264 #define IXGBE_MAX_DATA_PER_TXD (1 << IXGBE_MAX_TXD_PWR)
265
266 /* Tx Descriptors needed, worst case */
267 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
268 (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
269 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
270 MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
271
272 static void ixgbe_tx_timeout(struct net_device *netdev);
273
274 /**
275 * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
276 * @q_vector: structure containing interrupt and ring information
277 * @tx_ring: tx ring to clean
278 **/
279 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
280 struct ixgbe_ring *tx_ring)
281 {
282 struct ixgbe_adapter *adapter = q_vector->adapter;
283 struct net_device *netdev = adapter->netdev;
284 union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
285 struct ixgbe_tx_buffer *tx_buffer_info;
286 unsigned int i, eop, count = 0;
287 unsigned int total_bytes = 0, total_packets = 0;
288
289 i = tx_ring->next_to_clean;
290 eop = tx_ring->tx_buffer_info[i].next_to_watch;
291 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
292
293 while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
294 (count < tx_ring->work_limit)) {
295 bool cleaned = false;
296 for ( ; !cleaned; count++) {
297 struct sk_buff *skb;
298 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
299 tx_buffer_info = &tx_ring->tx_buffer_info[i];
300 cleaned = (i == eop);
301 skb = tx_buffer_info->skb;
302
303 if (cleaned && skb) {
304 unsigned int segs, bytecount;
305 unsigned int hlen = skb_headlen(skb);
306
307 /* gso_segs is currently only valid for tcp */
308 segs = skb_shinfo(skb)->gso_segs ?: 1;
309 #ifdef IXGBE_FCOE
310 /* adjust for FCoE Sequence Offload */
311 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
312 && (skb->protocol == htons(ETH_P_FCOE)) &&
313 skb_is_gso(skb)) {
314 hlen = skb_transport_offset(skb) +
315 sizeof(struct fc_frame_header) +
316 sizeof(struct fcoe_crc_eof);
317 segs = DIV_ROUND_UP(skb->len - hlen,
318 skb_shinfo(skb)->gso_size);
319 }
320 #endif /* IXGBE_FCOE */
321 /* multiply data chunks by size of headers */
322 bytecount = ((segs - 1) * hlen) + skb->len;
323 total_packets += segs;
324 total_bytes += bytecount;
325 }
326
327 ixgbe_unmap_and_free_tx_resource(adapter,
328 tx_buffer_info);
329
330 tx_desc->wb.status = 0;
331
332 i++;
333 if (i == tx_ring->count)
334 i = 0;
335 }
336
337 eop = tx_ring->tx_buffer_info[i].next_to_watch;
338 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
339 }
340
341 tx_ring->next_to_clean = i;
342
343 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
344 if (unlikely(count && netif_carrier_ok(netdev) &&
345 (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
346 /* Make sure that anybody stopping the queue after this
347 * sees the new next_to_clean.
348 */
349 smp_mb();
350 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
351 !test_bit(__IXGBE_DOWN, &adapter->state)) {
352 netif_wake_subqueue(netdev, tx_ring->queue_index);
353 ++adapter->restart_queue;
354 }
355 }
356
357 if (adapter->detect_tx_hung) {
358 if (ixgbe_check_tx_hang(adapter, tx_ring, i)) {
359 /* schedule immediate reset if we believe we hung */
360 DPRINTK(PROBE, INFO,
361 "tx hang %d detected, resetting adapter\n",
362 adapter->tx_timeout_count + 1);
363 ixgbe_tx_timeout(adapter->netdev);
364 }
365 }
366
367 /* re-arm the interrupt */
368 if (count >= tx_ring->work_limit)
369 ixgbe_irq_rearm_queues(adapter, ((u64)1 << q_vector->v_idx));
370
371 tx_ring->total_bytes += total_bytes;
372 tx_ring->total_packets += total_packets;
373 tx_ring->stats.packets += total_packets;
374 tx_ring->stats.bytes += total_bytes;
375 adapter->net_stats.tx_bytes += total_bytes;
376 adapter->net_stats.tx_packets += total_packets;
377 return (count < tx_ring->work_limit);
378 }
379
380 #ifdef CONFIG_IXGBE_DCA
381 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
382 struct ixgbe_ring *rx_ring)
383 {
384 u32 rxctrl;
385 int cpu = get_cpu();
386 int q = rx_ring - adapter->rx_ring;
387
388 if (rx_ring->cpu != cpu) {
389 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
390 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
391 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
392 rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
393 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
394 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
395 rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
396 IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
397 }
398 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
399 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
400 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
401 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_WRO_EN |
402 IXGBE_DCA_RXCTRL_DESC_HSRO_EN);
403 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
404 rx_ring->cpu = cpu;
405 }
406 put_cpu();
407 }
408
409 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
410 struct ixgbe_ring *tx_ring)
411 {
412 u32 txctrl;
413 int cpu = get_cpu();
414 int q = tx_ring - adapter->tx_ring;
415
416 if (tx_ring->cpu != cpu) {
417 txctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q));
418 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
419 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
420 txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
421 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
422 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
423 txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
424 IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
425 }
426 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
427 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q), txctrl);
428 tx_ring->cpu = cpu;
429 }
430 put_cpu();
431 }
432
433 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
434 {
435 int i;
436
437 if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
438 return;
439
440 /* always use CB2 mode, difference is masked in the CB driver */
441 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
442
443 for (i = 0; i < adapter->num_tx_queues; i++) {
444 adapter->tx_ring[i].cpu = -1;
445 ixgbe_update_tx_dca(adapter, &adapter->tx_ring[i]);
446 }
447 for (i = 0; i < adapter->num_rx_queues; i++) {
448 adapter->rx_ring[i].cpu = -1;
449 ixgbe_update_rx_dca(adapter, &adapter->rx_ring[i]);
450 }
451 }
452
453 static int __ixgbe_notify_dca(struct device *dev, void *data)
454 {
455 struct net_device *netdev = dev_get_drvdata(dev);
456 struct ixgbe_adapter *adapter = netdev_priv(netdev);
457 unsigned long event = *(unsigned long *)data;
458
459 switch (event) {
460 case DCA_PROVIDER_ADD:
461 /* if we're already enabled, don't do it again */
462 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
463 break;
464 if (dca_add_requester(dev) == 0) {
465 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
466 ixgbe_setup_dca(adapter);
467 break;
468 }
469 /* Fall Through since DCA is disabled. */
470 case DCA_PROVIDER_REMOVE:
471 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
472 dca_remove_requester(dev);
473 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
474 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
475 }
476 break;
477 }
478
479 return 0;
480 }
481
482 #endif /* CONFIG_IXGBE_DCA */
483 /**
484 * ixgbe_receive_skb - Send a completed packet up the stack
485 * @adapter: board private structure
486 * @skb: packet to send up
487 * @status: hardware indication of status of receive
488 * @rx_ring: rx descriptor ring (for a specific queue) to setup
489 * @rx_desc: rx descriptor
490 **/
491 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
492 struct sk_buff *skb, u8 status,
493 struct ixgbe_ring *ring,
494 union ixgbe_adv_rx_desc *rx_desc)
495 {
496 struct ixgbe_adapter *adapter = q_vector->adapter;
497 struct napi_struct *napi = &q_vector->napi;
498 bool is_vlan = (status & IXGBE_RXD_STAT_VP);
499 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
500
501 skb_record_rx_queue(skb, ring->queue_index);
502 if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
503 if (adapter->vlgrp && is_vlan && (tag & VLAN_VID_MASK))
504 vlan_gro_receive(napi, adapter->vlgrp, tag, skb);
505 else
506 napi_gro_receive(napi, skb);
507 } else {
508 if (adapter->vlgrp && is_vlan && (tag & VLAN_VID_MASK))
509 vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
510 else
511 netif_rx(skb);
512 }
513 }
514
515 /**
516 * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
517 * @adapter: address of board private structure
518 * @status_err: hardware indication of status of receive
519 * @skb: skb currently being received and modified
520 **/
521 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
522 union ixgbe_adv_rx_desc *rx_desc,
523 struct sk_buff *skb)
524 {
525 u32 status_err = le32_to_cpu(rx_desc->wb.upper.status_error);
526
527 skb->ip_summed = CHECKSUM_NONE;
528
529 /* Rx csum disabled */
530 if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
531 return;
532
533 /* if IP and error */
534 if ((status_err & IXGBE_RXD_STAT_IPCS) &&
535 (status_err & IXGBE_RXDADV_ERR_IPE)) {
536 adapter->hw_csum_rx_error++;
537 return;
538 }
539
540 if (!(status_err & IXGBE_RXD_STAT_L4CS))
541 return;
542
543 if (status_err & IXGBE_RXDADV_ERR_TCPE) {
544 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
545
546 /*
547 * 82599 errata, UDP frames with a 0 checksum can be marked as
548 * checksum errors.
549 */
550 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
551 (adapter->hw.mac.type == ixgbe_mac_82599EB))
552 return;
553
554 adapter->hw_csum_rx_error++;
555 return;
556 }
557
558 /* It must be a TCP or UDP packet with a valid checksum */
559 skb->ip_summed = CHECKSUM_UNNECESSARY;
560 adapter->hw_csum_rx_good++;
561 }
562
563 static inline void ixgbe_release_rx_desc(struct ixgbe_hw *hw,
564 struct ixgbe_ring *rx_ring, u32 val)
565 {
566 /*
567 * Force memory writes to complete before letting h/w
568 * know there are new descriptors to fetch. (Only
569 * applicable for weak-ordered memory model archs,
570 * such as IA-64).
571 */
572 wmb();
573 IXGBE_WRITE_REG(hw, IXGBE_RDT(rx_ring->reg_idx), val);
574 }
575
576 /**
577 * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
578 * @adapter: address of board private structure
579 **/
580 static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
581 struct ixgbe_ring *rx_ring,
582 int cleaned_count)
583 {
584 struct pci_dev *pdev = adapter->pdev;
585 union ixgbe_adv_rx_desc *rx_desc;
586 struct ixgbe_rx_buffer *bi;
587 unsigned int i;
588
589 i = rx_ring->next_to_use;
590 bi = &rx_ring->rx_buffer_info[i];
591
592 while (cleaned_count--) {
593 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
594
595 if (!bi->page_dma &&
596 (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)) {
597 if (!bi->page) {
598 bi->page = alloc_page(GFP_ATOMIC);
599 if (!bi->page) {
600 adapter->alloc_rx_page_failed++;
601 goto no_buffers;
602 }
603 bi->page_offset = 0;
604 } else {
605 /* use a half page if we're re-using */
606 bi->page_offset ^= (PAGE_SIZE / 2);
607 }
608
609 bi->page_dma = pci_map_page(pdev, bi->page,
610 bi->page_offset,
611 (PAGE_SIZE / 2),
612 PCI_DMA_FROMDEVICE);
613 }
614
615 if (!bi->skb) {
616 struct sk_buff *skb;
617 skb = netdev_alloc_skb(adapter->netdev,
618 (rx_ring->rx_buf_len +
619 NET_IP_ALIGN));
620
621 if (!skb) {
622 adapter->alloc_rx_buff_failed++;
623 goto no_buffers;
624 }
625
626 /*
627 * Make buffer alignment 2 beyond a 16 byte boundary
628 * this will result in a 16 byte aligned IP header after
629 * the 14 byte MAC header is removed
630 */
631 skb_reserve(skb, NET_IP_ALIGN);
632
633 bi->skb = skb;
634 bi->dma = pci_map_single(pdev, skb->data,
635 rx_ring->rx_buf_len,
636 PCI_DMA_FROMDEVICE);
637 }
638 /* Refresh the desc even if buffer_addrs didn't change because
639 * each write-back erases this info. */
640 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
641 rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
642 rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
643 } else {
644 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
645 }
646
647 i++;
648 if (i == rx_ring->count)
649 i = 0;
650 bi = &rx_ring->rx_buffer_info[i];
651 }
652
653 no_buffers:
654 if (rx_ring->next_to_use != i) {
655 rx_ring->next_to_use = i;
656 if (i-- == 0)
657 i = (rx_ring->count - 1);
658
659 ixgbe_release_rx_desc(&adapter->hw, rx_ring, i);
660 }
661 }
662
663 static inline u16 ixgbe_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
664 {
665 return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
666 }
667
668 static inline u16 ixgbe_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
669 {
670 return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
671 }
672
673 static inline u32 ixgbe_get_rsc_count(union ixgbe_adv_rx_desc *rx_desc)
674 {
675 return (le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
676 IXGBE_RXDADV_RSCCNT_MASK) >>
677 IXGBE_RXDADV_RSCCNT_SHIFT;
678 }
679
680 /**
681 * ixgbe_transform_rsc_queue - change rsc queue into a full packet
682 * @skb: pointer to the last skb in the rsc queue
683 *
684 * This function changes a queue full of hw rsc buffers into a completed
685 * packet. It uses the ->prev pointers to find the first packet and then
686 * turns it into the frag list owner.
687 **/
688 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb)
689 {
690 unsigned int frag_list_size = 0;
691
692 while (skb->prev) {
693 struct sk_buff *prev = skb->prev;
694 frag_list_size += skb->len;
695 skb->prev = NULL;
696 skb = prev;
697 }
698
699 skb_shinfo(skb)->frag_list = skb->next;
700 skb->next = NULL;
701 skb->len += frag_list_size;
702 skb->data_len += frag_list_size;
703 skb->truesize += frag_list_size;
704 return skb;
705 }
706
707 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
708 struct ixgbe_ring *rx_ring,
709 int *work_done, int work_to_do)
710 {
711 struct ixgbe_adapter *adapter = q_vector->adapter;
712 struct pci_dev *pdev = adapter->pdev;
713 union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
714 struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
715 struct sk_buff *skb;
716 unsigned int i, rsc_count = 0;
717 u32 len, staterr;
718 u16 hdr_info;
719 bool cleaned = false;
720 int cleaned_count = 0;
721 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
722 #ifdef IXGBE_FCOE
723 int ddp_bytes = 0;
724 #endif /* IXGBE_FCOE */
725
726 i = rx_ring->next_to_clean;
727 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
728 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
729 rx_buffer_info = &rx_ring->rx_buffer_info[i];
730
731 while (staterr & IXGBE_RXD_STAT_DD) {
732 u32 upper_len = 0;
733 if (*work_done >= work_to_do)
734 break;
735 (*work_done)++;
736
737 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
738 hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
739 len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
740 IXGBE_RXDADV_HDRBUFLEN_SHIFT;
741 if (hdr_info & IXGBE_RXDADV_SPH)
742 adapter->rx_hdr_split++;
743 if (len > IXGBE_RX_HDR_SIZE)
744 len = IXGBE_RX_HDR_SIZE;
745 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
746 } else {
747 len = le16_to_cpu(rx_desc->wb.upper.length);
748 }
749
750 cleaned = true;
751 skb = rx_buffer_info->skb;
752 prefetch(skb->data - NET_IP_ALIGN);
753 rx_buffer_info->skb = NULL;
754
755 if (rx_buffer_info->dma) {
756 pci_unmap_single(pdev, rx_buffer_info->dma,
757 rx_ring->rx_buf_len,
758 PCI_DMA_FROMDEVICE);
759 rx_buffer_info->dma = 0;
760 skb_put(skb, len);
761 }
762
763 if (upper_len) {
764 pci_unmap_page(pdev, rx_buffer_info->page_dma,
765 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
766 rx_buffer_info->page_dma = 0;
767 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
768 rx_buffer_info->page,
769 rx_buffer_info->page_offset,
770 upper_len);
771
772 if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
773 (page_count(rx_buffer_info->page) != 1))
774 rx_buffer_info->page = NULL;
775 else
776 get_page(rx_buffer_info->page);
777
778 skb->len += upper_len;
779 skb->data_len += upper_len;
780 skb->truesize += upper_len;
781 }
782
783 i++;
784 if (i == rx_ring->count)
785 i = 0;
786
787 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
788 prefetch(next_rxd);
789 cleaned_count++;
790
791 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
792 rsc_count = ixgbe_get_rsc_count(rx_desc);
793
794 if (rsc_count) {
795 u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
796 IXGBE_RXDADV_NEXTP_SHIFT;
797 next_buffer = &rx_ring->rx_buffer_info[nextp];
798 rx_ring->rsc_count += (rsc_count - 1);
799 } else {
800 next_buffer = &rx_ring->rx_buffer_info[i];
801 }
802
803 if (staterr & IXGBE_RXD_STAT_EOP) {
804 if (skb->prev)
805 skb = ixgbe_transform_rsc_queue(skb);
806 rx_ring->stats.packets++;
807 rx_ring->stats.bytes += skb->len;
808 } else {
809 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
810 rx_buffer_info->skb = next_buffer->skb;
811 rx_buffer_info->dma = next_buffer->dma;
812 next_buffer->skb = skb;
813 next_buffer->dma = 0;
814 } else {
815 skb->next = next_buffer->skb;
816 skb->next->prev = skb;
817 }
818 adapter->non_eop_descs++;
819 goto next_desc;
820 }
821
822 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
823 dev_kfree_skb_irq(skb);
824 goto next_desc;
825 }
826
827 ixgbe_rx_checksum(adapter, rx_desc, skb);
828
829 /* probably a little skewed due to removing CRC */
830 total_rx_bytes += skb->len;
831 total_rx_packets++;
832
833 skb->protocol = eth_type_trans(skb, adapter->netdev);
834 #ifdef IXGBE_FCOE
835 /* if ddp, not passing to ULD unless for FCP_RSP or error */
836 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
837 ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
838 if (!ddp_bytes)
839 goto next_desc;
840 }
841 #endif /* IXGBE_FCOE */
842 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
843
844 next_desc:
845 rx_desc->wb.upper.status_error = 0;
846
847 /* return some buffers to hardware, one at a time is too slow */
848 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
849 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
850 cleaned_count = 0;
851 }
852
853 /* use prefetched values */
854 rx_desc = next_rxd;
855 rx_buffer_info = &rx_ring->rx_buffer_info[i];
856
857 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
858 }
859
860 rx_ring->next_to_clean = i;
861 cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
862
863 if (cleaned_count)
864 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
865
866 #ifdef IXGBE_FCOE
867 /* include DDPed FCoE data */
868 if (ddp_bytes > 0) {
869 unsigned int mss;
870
871 mss = adapter->netdev->mtu - sizeof(struct fcoe_hdr) -
872 sizeof(struct fc_frame_header) -
873 sizeof(struct fcoe_crc_eof);
874 if (mss > 512)
875 mss &= ~511;
876 total_rx_bytes += ddp_bytes;
877 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
878 }
879 #endif /* IXGBE_FCOE */
880
881 rx_ring->total_packets += total_rx_packets;
882 rx_ring->total_bytes += total_rx_bytes;
883 adapter->net_stats.rx_bytes += total_rx_bytes;
884 adapter->net_stats.rx_packets += total_rx_packets;
885
886 return cleaned;
887 }
888
889 static int ixgbe_clean_rxonly(struct napi_struct *, int);
890 /**
891 * ixgbe_configure_msix - Configure MSI-X hardware
892 * @adapter: board private structure
893 *
894 * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
895 * interrupts.
896 **/
897 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
898 {
899 struct ixgbe_q_vector *q_vector;
900 int i, j, q_vectors, v_idx, r_idx;
901 u32 mask;
902
903 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
904
905 /*
906 * Populate the IVAR table and set the ITR values to the
907 * corresponding register.
908 */
909 for (v_idx = 0; v_idx < q_vectors; v_idx++) {
910 q_vector = adapter->q_vector[v_idx];
911 /* XXX for_each_bit(...) */
912 r_idx = find_first_bit(q_vector->rxr_idx,
913 adapter->num_rx_queues);
914
915 for (i = 0; i < q_vector->rxr_count; i++) {
916 j = adapter->rx_ring[r_idx].reg_idx;
917 ixgbe_set_ivar(adapter, 0, j, v_idx);
918 r_idx = find_next_bit(q_vector->rxr_idx,
919 adapter->num_rx_queues,
920 r_idx + 1);
921 }
922 r_idx = find_first_bit(q_vector->txr_idx,
923 adapter->num_tx_queues);
924
925 for (i = 0; i < q_vector->txr_count; i++) {
926 j = adapter->tx_ring[r_idx].reg_idx;
927 ixgbe_set_ivar(adapter, 1, j, v_idx);
928 r_idx = find_next_bit(q_vector->txr_idx,
929 adapter->num_tx_queues,
930 r_idx + 1);
931 }
932
933 if (q_vector->txr_count && !q_vector->rxr_count)
934 /* tx only */
935 q_vector->eitr = adapter->tx_eitr_param;
936 else if (q_vector->rxr_count)
937 /* rx or mixed */
938 q_vector->eitr = adapter->rx_eitr_param;
939
940 ixgbe_write_eitr(q_vector);
941 }
942
943 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
944 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
945 v_idx);
946 else if (adapter->hw.mac.type == ixgbe_mac_82599EB)
947 ixgbe_set_ivar(adapter, -1, 1, v_idx);
948 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
949
950 /* set up to autoclear timer, and the vectors */
951 mask = IXGBE_EIMS_ENABLE_MASK;
952 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
953 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
954 }
955
956 enum latency_range {
957 lowest_latency = 0,
958 low_latency = 1,
959 bulk_latency = 2,
960 latency_invalid = 255
961 };
962
963 /**
964 * ixgbe_update_itr - update the dynamic ITR value based on statistics
965 * @adapter: pointer to adapter
966 * @eitr: eitr setting (ints per sec) to give last timeslice
967 * @itr_setting: current throttle rate in ints/second
968 * @packets: the number of packets during this measurement interval
969 * @bytes: the number of bytes during this measurement interval
970 *
971 * Stores a new ITR value based on packets and byte
972 * counts during the last interrupt. The advantage of per interrupt
973 * computation is faster updates and more accurate ITR for the current
974 * traffic pattern. Constants in this function were computed
975 * based on theoretical maximum wire speed and thresholds were set based
976 * on testing data as well as attempting to minimize response time
977 * while increasing bulk throughput.
978 * this functionality is controlled by the InterruptThrottleRate module
979 * parameter (see ixgbe_param.c)
980 **/
981 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
982 u32 eitr, u8 itr_setting,
983 int packets, int bytes)
984 {
985 unsigned int retval = itr_setting;
986 u32 timepassed_us;
987 u64 bytes_perint;
988
989 if (packets == 0)
990 goto update_itr_done;
991
992
993 /* simple throttlerate management
994 * 0-20MB/s lowest (100000 ints/s)
995 * 20-100MB/s low (20000 ints/s)
996 * 100-1249MB/s bulk (8000 ints/s)
997 */
998 /* what was last interrupt timeslice? */
999 timepassed_us = 1000000/eitr;
1000 bytes_perint = bytes / timepassed_us; /* bytes/usec */
1001
1002 switch (itr_setting) {
1003 case lowest_latency:
1004 if (bytes_perint > adapter->eitr_low)
1005 retval = low_latency;
1006 break;
1007 case low_latency:
1008 if (bytes_perint > adapter->eitr_high)
1009 retval = bulk_latency;
1010 else if (bytes_perint <= adapter->eitr_low)
1011 retval = lowest_latency;
1012 break;
1013 case bulk_latency:
1014 if (bytes_perint <= adapter->eitr_high)
1015 retval = low_latency;
1016 break;
1017 }
1018
1019 update_itr_done:
1020 return retval;
1021 }
1022
1023 /**
1024 * ixgbe_write_eitr - write EITR register in hardware specific way
1025 * @q_vector: structure containing interrupt and ring information
1026 *
1027 * This function is made to be called by ethtool and by the driver
1028 * when it needs to update EITR registers at runtime. Hardware
1029 * specific quirks/differences are taken care of here.
1030 */
1031 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1032 {
1033 struct ixgbe_adapter *adapter = q_vector->adapter;
1034 struct ixgbe_hw *hw = &adapter->hw;
1035 int v_idx = q_vector->v_idx;
1036 u32 itr_reg = EITR_INTS_PER_SEC_TO_REG(q_vector->eitr);
1037
1038 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1039 /* must write high and low 16 bits to reset counter */
1040 itr_reg |= (itr_reg << 16);
1041 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1042 /*
1043 * set the WDIS bit to not clear the timer bits and cause an
1044 * immediate assertion of the interrupt
1045 */
1046 itr_reg |= IXGBE_EITR_CNT_WDIS;
1047 }
1048 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1049 }
1050
1051 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
1052 {
1053 struct ixgbe_adapter *adapter = q_vector->adapter;
1054 u32 new_itr;
1055 u8 current_itr, ret_itr;
1056 int i, r_idx;
1057 struct ixgbe_ring *rx_ring, *tx_ring;
1058
1059 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1060 for (i = 0; i < q_vector->txr_count; i++) {
1061 tx_ring = &(adapter->tx_ring[r_idx]);
1062 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1063 q_vector->tx_itr,
1064 tx_ring->total_packets,
1065 tx_ring->total_bytes);
1066 /* if the result for this queue would decrease interrupt
1067 * rate for this vector then use that result */
1068 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
1069 q_vector->tx_itr - 1 : ret_itr);
1070 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1071 r_idx + 1);
1072 }
1073
1074 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1075 for (i = 0; i < q_vector->rxr_count; i++) {
1076 rx_ring = &(adapter->rx_ring[r_idx]);
1077 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1078 q_vector->rx_itr,
1079 rx_ring->total_packets,
1080 rx_ring->total_bytes);
1081 /* if the result for this queue would decrease interrupt
1082 * rate for this vector then use that result */
1083 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
1084 q_vector->rx_itr - 1 : ret_itr);
1085 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1086 r_idx + 1);
1087 }
1088
1089 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1090
1091 switch (current_itr) {
1092 /* counts and packets in update_itr are dependent on these numbers */
1093 case lowest_latency:
1094 new_itr = 100000;
1095 break;
1096 case low_latency:
1097 new_itr = 20000; /* aka hwitr = ~200 */
1098 break;
1099 case bulk_latency:
1100 default:
1101 new_itr = 8000;
1102 break;
1103 }
1104
1105 if (new_itr != q_vector->eitr) {
1106 /* do an exponential smoothing */
1107 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1108
1109 /* save the algorithm value here, not the smoothed one */
1110 q_vector->eitr = new_itr;
1111
1112 ixgbe_write_eitr(q_vector);
1113 }
1114
1115 return;
1116 }
1117
1118 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1119 {
1120 struct ixgbe_hw *hw = &adapter->hw;
1121
1122 if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1123 (eicr & IXGBE_EICR_GPI_SDP1)) {
1124 DPRINTK(PROBE, CRIT, "Fan has stopped, replace the adapter\n");
1125 /* write to clear the interrupt */
1126 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1127 }
1128 }
1129
1130 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1131 {
1132 struct ixgbe_hw *hw = &adapter->hw;
1133
1134 if (eicr & IXGBE_EICR_GPI_SDP1) {
1135 /* Clear the interrupt */
1136 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1137 schedule_work(&adapter->multispeed_fiber_task);
1138 } else if (eicr & IXGBE_EICR_GPI_SDP2) {
1139 /* Clear the interrupt */
1140 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1141 schedule_work(&adapter->sfp_config_module_task);
1142 } else {
1143 /* Interrupt isn't for us... */
1144 return;
1145 }
1146 }
1147
1148 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1149 {
1150 struct ixgbe_hw *hw = &adapter->hw;
1151
1152 adapter->lsc_int++;
1153 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1154 adapter->link_check_timeout = jiffies;
1155 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1156 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1157 schedule_work(&adapter->watchdog_task);
1158 }
1159 }
1160
1161 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1162 {
1163 struct net_device *netdev = data;
1164 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1165 struct ixgbe_hw *hw = &adapter->hw;
1166 u32 eicr;
1167
1168 /*
1169 * Workaround for Silicon errata. Use clear-by-write instead
1170 * of clear-by-read. Reading with EICS will return the
1171 * interrupt causes without clearing, which later be done
1172 * with the write to EICR.
1173 */
1174 eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1175 IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1176
1177 if (eicr & IXGBE_EICR_LSC)
1178 ixgbe_check_lsc(adapter);
1179
1180 if (hw->mac.type == ixgbe_mac_82598EB)
1181 ixgbe_check_fan_failure(adapter, eicr);
1182
1183 if (hw->mac.type == ixgbe_mac_82599EB) {
1184 ixgbe_check_sfp_event(adapter, eicr);
1185
1186 /* Handle Flow Director Full threshold interrupt */
1187 if (eicr & IXGBE_EICR_FLOW_DIR) {
1188 int i;
1189 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_FLOW_DIR);
1190 /* Disable transmits before FDIR Re-initialization */
1191 netif_tx_stop_all_queues(netdev);
1192 for (i = 0; i < adapter->num_tx_queues; i++) {
1193 struct ixgbe_ring *tx_ring =
1194 &adapter->tx_ring[i];
1195 if (test_and_clear_bit(__IXGBE_FDIR_INIT_DONE,
1196 &tx_ring->reinit_state))
1197 schedule_work(&adapter->fdir_reinit_task);
1198 }
1199 }
1200 }
1201 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1202 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
1203
1204 return IRQ_HANDLED;
1205 }
1206
1207 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1208 u64 qmask)
1209 {
1210 u32 mask;
1211
1212 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1213 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1214 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1215 } else {
1216 mask = (qmask & 0xFFFFFFFF);
1217 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(0), mask);
1218 mask = (qmask >> 32);
1219 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(1), mask);
1220 }
1221 /* skip the flush */
1222 }
1223
1224 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1225 u64 qmask)
1226 {
1227 u32 mask;
1228
1229 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1230 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1231 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, mask);
1232 } else {
1233 mask = (qmask & 0xFFFFFFFF);
1234 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), mask);
1235 mask = (qmask >> 32);
1236 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), mask);
1237 }
1238 /* skip the flush */
1239 }
1240
1241 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
1242 {
1243 struct ixgbe_q_vector *q_vector = data;
1244 struct ixgbe_adapter *adapter = q_vector->adapter;
1245 struct ixgbe_ring *tx_ring;
1246 int i, r_idx;
1247
1248 if (!q_vector->txr_count)
1249 return IRQ_HANDLED;
1250
1251 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1252 for (i = 0; i < q_vector->txr_count; i++) {
1253 tx_ring = &(adapter->tx_ring[r_idx]);
1254 tx_ring->total_bytes = 0;
1255 tx_ring->total_packets = 0;
1256 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1257 r_idx + 1);
1258 }
1259
1260 /* disable interrupts on this vector only */
1261 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1262 napi_schedule(&q_vector->napi);
1263
1264 return IRQ_HANDLED;
1265 }
1266
1267 /**
1268 * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
1269 * @irq: unused
1270 * @data: pointer to our q_vector struct for this interrupt vector
1271 **/
1272 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
1273 {
1274 struct ixgbe_q_vector *q_vector = data;
1275 struct ixgbe_adapter *adapter = q_vector->adapter;
1276 struct ixgbe_ring *rx_ring;
1277 int r_idx;
1278 int i;
1279
1280 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1281 for (i = 0; i < q_vector->rxr_count; i++) {
1282 rx_ring = &(adapter->rx_ring[r_idx]);
1283 rx_ring->total_bytes = 0;
1284 rx_ring->total_packets = 0;
1285 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1286 r_idx + 1);
1287 }
1288
1289 if (!q_vector->rxr_count)
1290 return IRQ_HANDLED;
1291
1292 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1293 rx_ring = &(adapter->rx_ring[r_idx]);
1294 /* disable interrupts on this vector only */
1295 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1296 napi_schedule(&q_vector->napi);
1297
1298 return IRQ_HANDLED;
1299 }
1300
1301 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1302 {
1303 struct ixgbe_q_vector *q_vector = data;
1304 struct ixgbe_adapter *adapter = q_vector->adapter;
1305 struct ixgbe_ring *ring;
1306 int r_idx;
1307 int i;
1308
1309 if (!q_vector->txr_count && !q_vector->rxr_count)
1310 return IRQ_HANDLED;
1311
1312 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1313 for (i = 0; i < q_vector->txr_count; i++) {
1314 ring = &(adapter->tx_ring[r_idx]);
1315 ring->total_bytes = 0;
1316 ring->total_packets = 0;
1317 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1318 r_idx + 1);
1319 }
1320
1321 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1322 for (i = 0; i < q_vector->rxr_count; i++) {
1323 ring = &(adapter->rx_ring[r_idx]);
1324 ring->total_bytes = 0;
1325 ring->total_packets = 0;
1326 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1327 r_idx + 1);
1328 }
1329
1330 /* disable interrupts on this vector only */
1331 ixgbe_irq_disable_queues(adapter, ((u64)1 << q_vector->v_idx));
1332 napi_schedule(&q_vector->napi);
1333
1334 return IRQ_HANDLED;
1335 }
1336
1337 /**
1338 * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1339 * @napi: napi struct with our devices info in it
1340 * @budget: amount of work driver is allowed to do this pass, in packets
1341 *
1342 * This function is optimized for cleaning one queue only on a single
1343 * q_vector!!!
1344 **/
1345 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1346 {
1347 struct ixgbe_q_vector *q_vector =
1348 container_of(napi, struct ixgbe_q_vector, napi);
1349 struct ixgbe_adapter *adapter = q_vector->adapter;
1350 struct ixgbe_ring *rx_ring = NULL;
1351 int work_done = 0;
1352 long r_idx;
1353
1354 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1355 rx_ring = &(adapter->rx_ring[r_idx]);
1356 #ifdef CONFIG_IXGBE_DCA
1357 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1358 ixgbe_update_rx_dca(adapter, rx_ring);
1359 #endif
1360
1361 ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
1362
1363 /* If all Rx work done, exit the polling mode */
1364 if (work_done < budget) {
1365 napi_complete(napi);
1366 if (adapter->rx_itr_setting & 1)
1367 ixgbe_set_itr_msix(q_vector);
1368 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1369 ixgbe_irq_enable_queues(adapter,
1370 ((u64)1 << q_vector->v_idx));
1371 }
1372
1373 return work_done;
1374 }
1375
1376 /**
1377 * ixgbe_clean_rxtx_many - msix (aka one shot) rx clean routine
1378 * @napi: napi struct with our devices info in it
1379 * @budget: amount of work driver is allowed to do this pass, in packets
1380 *
1381 * This function will clean more than one rx queue associated with a
1382 * q_vector.
1383 **/
1384 static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
1385 {
1386 struct ixgbe_q_vector *q_vector =
1387 container_of(napi, struct ixgbe_q_vector, napi);
1388 struct ixgbe_adapter *adapter = q_vector->adapter;
1389 struct ixgbe_ring *ring = NULL;
1390 int work_done = 0, i;
1391 long r_idx;
1392 bool tx_clean_complete = true;
1393
1394 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1395 for (i = 0; i < q_vector->txr_count; i++) {
1396 ring = &(adapter->tx_ring[r_idx]);
1397 #ifdef CONFIG_IXGBE_DCA
1398 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1399 ixgbe_update_tx_dca(adapter, ring);
1400 #endif
1401 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
1402 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1403 r_idx + 1);
1404 }
1405
1406 /* attempt to distribute budget to each queue fairly, but don't allow
1407 * the budget to go below 1 because we'll exit polling */
1408 budget /= (q_vector->rxr_count ?: 1);
1409 budget = max(budget, 1);
1410 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1411 for (i = 0; i < q_vector->rxr_count; i++) {
1412 ring = &(adapter->rx_ring[r_idx]);
1413 #ifdef CONFIG_IXGBE_DCA
1414 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1415 ixgbe_update_rx_dca(adapter, ring);
1416 #endif
1417 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
1418 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1419 r_idx + 1);
1420 }
1421
1422 r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1423 ring = &(adapter->rx_ring[r_idx]);
1424 /* If all Rx work done, exit the polling mode */
1425 if (work_done < budget) {
1426 napi_complete(napi);
1427 if (adapter->rx_itr_setting & 1)
1428 ixgbe_set_itr_msix(q_vector);
1429 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1430 ixgbe_irq_enable_queues(adapter,
1431 ((u64)1 << q_vector->v_idx));
1432 return 0;
1433 }
1434
1435 return work_done;
1436 }
1437
1438 /**
1439 * ixgbe_clean_txonly - msix (aka one shot) tx clean routine
1440 * @napi: napi struct with our devices info in it
1441 * @budget: amount of work driver is allowed to do this pass, in packets
1442 *
1443 * This function is optimized for cleaning one queue only on a single
1444 * q_vector!!!
1445 **/
1446 static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
1447 {
1448 struct ixgbe_q_vector *q_vector =
1449 container_of(napi, struct ixgbe_q_vector, napi);
1450 struct ixgbe_adapter *adapter = q_vector->adapter;
1451 struct ixgbe_ring *tx_ring = NULL;
1452 int work_done = 0;
1453 long r_idx;
1454
1455 r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1456 tx_ring = &(adapter->tx_ring[r_idx]);
1457 #ifdef CONFIG_IXGBE_DCA
1458 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1459 ixgbe_update_tx_dca(adapter, tx_ring);
1460 #endif
1461
1462 if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
1463 work_done = budget;
1464
1465 /* If all Tx work done, exit the polling mode */
1466 if (work_done < budget) {
1467 napi_complete(napi);
1468 if (adapter->tx_itr_setting & 1)
1469 ixgbe_set_itr_msix(q_vector);
1470 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1471 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
1472 }
1473
1474 return work_done;
1475 }
1476
1477 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
1478 int r_idx)
1479 {
1480 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1481
1482 set_bit(r_idx, q_vector->rxr_idx);
1483 q_vector->rxr_count++;
1484 }
1485
1486 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
1487 int t_idx)
1488 {
1489 struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
1490
1491 set_bit(t_idx, q_vector->txr_idx);
1492 q_vector->txr_count++;
1493 }
1494
1495 /**
1496 * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
1497 * @adapter: board private structure to initialize
1498 * @vectors: allotted vector count for descriptor rings
1499 *
1500 * This function maps descriptor rings to the queue-specific vectors
1501 * we were allotted through the MSI-X enabling code. Ideally, we'd have
1502 * one vector per ring/queue, but on a constrained vector budget, we
1503 * group the rings as "efficiently" as possible. You would add new
1504 * mapping configurations in here.
1505 **/
1506 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
1507 int vectors)
1508 {
1509 int v_start = 0;
1510 int rxr_idx = 0, txr_idx = 0;
1511 int rxr_remaining = adapter->num_rx_queues;
1512 int txr_remaining = adapter->num_tx_queues;
1513 int i, j;
1514 int rqpv, tqpv;
1515 int err = 0;
1516
1517 /* No mapping required if MSI-X is disabled. */
1518 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1519 goto out;
1520
1521 /*
1522 * The ideal configuration...
1523 * We have enough vectors to map one per queue.
1524 */
1525 if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1526 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1527 map_vector_to_rxq(adapter, v_start, rxr_idx);
1528
1529 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1530 map_vector_to_txq(adapter, v_start, txr_idx);
1531
1532 goto out;
1533 }
1534
1535 /*
1536 * If we don't have enough vectors for a 1-to-1
1537 * mapping, we'll have to group them so there are
1538 * multiple queues per vector.
1539 */
1540 /* Re-adjusting *qpv takes care of the remainder. */
1541 for (i = v_start; i < vectors; i++) {
1542 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
1543 for (j = 0; j < rqpv; j++) {
1544 map_vector_to_rxq(adapter, i, rxr_idx);
1545 rxr_idx++;
1546 rxr_remaining--;
1547 }
1548 }
1549 for (i = v_start; i < vectors; i++) {
1550 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
1551 for (j = 0; j < tqpv; j++) {
1552 map_vector_to_txq(adapter, i, txr_idx);
1553 txr_idx++;
1554 txr_remaining--;
1555 }
1556 }
1557
1558 out:
1559 return err;
1560 }
1561
1562 /**
1563 * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
1564 * @adapter: board private structure
1565 *
1566 * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
1567 * interrupts from the kernel.
1568 **/
1569 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
1570 {
1571 struct net_device *netdev = adapter->netdev;
1572 irqreturn_t (*handler)(int, void *);
1573 int i, vector, q_vectors, err;
1574 int ri=0, ti=0;
1575
1576 /* Decrement for Other and TCP Timer vectors */
1577 q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1578
1579 /* Map the Tx/Rx rings to the vectors we were allotted. */
1580 err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
1581 if (err)
1582 goto out;
1583
1584 #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
1585 (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
1586 &ixgbe_msix_clean_many)
1587 for (vector = 0; vector < q_vectors; vector++) {
1588 handler = SET_HANDLER(adapter->q_vector[vector]);
1589
1590 if(handler == &ixgbe_msix_clean_rx) {
1591 sprintf(adapter->name[vector], "%s-%s-%d",
1592 netdev->name, "rx", ri++);
1593 }
1594 else if(handler == &ixgbe_msix_clean_tx) {
1595 sprintf(adapter->name[vector], "%s-%s-%d",
1596 netdev->name, "tx", ti++);
1597 }
1598 else
1599 sprintf(adapter->name[vector], "%s-%s-%d",
1600 netdev->name, "TxRx", vector);
1601
1602 err = request_irq(adapter->msix_entries[vector].vector,
1603 handler, 0, adapter->name[vector],
1604 adapter->q_vector[vector]);
1605 if (err) {
1606 DPRINTK(PROBE, ERR,
1607 "request_irq failed for MSIX interrupt "
1608 "Error: %d\n", err);
1609 goto free_queue_irqs;
1610 }
1611 }
1612
1613 sprintf(adapter->name[vector], "%s:lsc", netdev->name);
1614 err = request_irq(adapter->msix_entries[vector].vector,
1615 &ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
1616 if (err) {
1617 DPRINTK(PROBE, ERR,
1618 "request_irq for msix_lsc failed: %d\n", err);
1619 goto free_queue_irqs;
1620 }
1621
1622 return 0;
1623
1624 free_queue_irqs:
1625 for (i = vector - 1; i >= 0; i--)
1626 free_irq(adapter->msix_entries[--vector].vector,
1627 adapter->q_vector[i]);
1628 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
1629 pci_disable_msix(adapter->pdev);
1630 kfree(adapter->msix_entries);
1631 adapter->msix_entries = NULL;
1632 out:
1633 return err;
1634 }
1635
1636 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
1637 {
1638 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1639 u8 current_itr;
1640 u32 new_itr = q_vector->eitr;
1641 struct ixgbe_ring *rx_ring = &adapter->rx_ring[0];
1642 struct ixgbe_ring *tx_ring = &adapter->tx_ring[0];
1643
1644 q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
1645 q_vector->tx_itr,
1646 tx_ring->total_packets,
1647 tx_ring->total_bytes);
1648 q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
1649 q_vector->rx_itr,
1650 rx_ring->total_packets,
1651 rx_ring->total_bytes);
1652
1653 current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1654
1655 switch (current_itr) {
1656 /* counts and packets in update_itr are dependent on these numbers */
1657 case lowest_latency:
1658 new_itr = 100000;
1659 break;
1660 case low_latency:
1661 new_itr = 20000; /* aka hwitr = ~200 */
1662 break;
1663 case bulk_latency:
1664 new_itr = 8000;
1665 break;
1666 default:
1667 break;
1668 }
1669
1670 if (new_itr != q_vector->eitr) {
1671 /* do an exponential smoothing */
1672 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1673
1674 /* save the algorithm value here, not the smoothed one */
1675 q_vector->eitr = new_itr;
1676
1677 ixgbe_write_eitr(q_vector);
1678 }
1679
1680 return;
1681 }
1682
1683 /**
1684 * ixgbe_irq_enable - Enable default interrupt generation settings
1685 * @adapter: board private structure
1686 **/
1687 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
1688 {
1689 u32 mask;
1690
1691 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
1692 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
1693 mask |= IXGBE_EIMS_GPI_SDP1;
1694 if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1695 mask |= IXGBE_EIMS_ECC;
1696 mask |= IXGBE_EIMS_GPI_SDP1;
1697 mask |= IXGBE_EIMS_GPI_SDP2;
1698 }
1699 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
1700 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
1701 mask |= IXGBE_EIMS_FLOW_DIR;
1702
1703 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1704 ixgbe_irq_enable_queues(adapter, ~0);
1705 IXGBE_WRITE_FLUSH(&adapter->hw);
1706 }
1707
1708 /**
1709 * ixgbe_intr - legacy mode Interrupt Handler
1710 * @irq: interrupt number
1711 * @data: pointer to a network interface device structure
1712 **/
1713 static irqreturn_t ixgbe_intr(int irq, void *data)
1714 {
1715 struct net_device *netdev = data;
1716 struct ixgbe_adapter *adapter = netdev_priv(netdev);
1717 struct ixgbe_hw *hw = &adapter->hw;
1718 struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
1719 u32 eicr;
1720
1721 /*
1722 * Workaround for silicon errata. Mask the interrupts
1723 * before the read of EICR.
1724 */
1725 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
1726
1727 /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
1728 * therefore no explict interrupt disable is necessary */
1729 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
1730 if (!eicr) {
1731 /* shared interrupt alert!
1732 * make sure interrupts are enabled because the read will
1733 * have disabled interrupts due to EIAM */
1734 ixgbe_irq_enable(adapter);
1735 return IRQ_NONE; /* Not our interrupt */
1736 }
1737
1738 if (eicr & IXGBE_EICR_LSC)
1739 ixgbe_check_lsc(adapter);
1740
1741 if (hw->mac.type == ixgbe_mac_82599EB)
1742 ixgbe_check_sfp_event(adapter, eicr);
1743
1744 ixgbe_check_fan_failure(adapter, eicr);
1745
1746 if (napi_schedule_prep(&(q_vector->napi))) {
1747 adapter->tx_ring[0].total_packets = 0;
1748 adapter->tx_ring[0].total_bytes = 0;
1749 adapter->rx_ring[0].total_packets = 0;
1750 adapter->rx_ring[0].total_bytes = 0;
1751 /* would disable interrupts here but EIAM disabled it */
1752 __napi_schedule(&(q_vector->napi));
1753 }
1754
1755 return IRQ_HANDLED;
1756 }
1757
1758 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
1759 {
1760 int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1761
1762 for (i = 0; i < q_vectors; i++) {
1763 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
1764 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
1765 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
1766 q_vector->rxr_count = 0;
1767 q_vector->txr_count = 0;
1768 }
1769 }
1770
1771 /**
1772 * ixgbe_request_irq - initialize interrupts
1773 * @adapter: board private structure
1774 *
1775 * Attempts to configure interrupts using the best available
1776 * capabilities of the hardware and kernel.
1777 **/
1778 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
1779 {
1780 struct net_device *netdev = adapter->netdev;
1781 int err;
1782
1783 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1784 err = ixgbe_request_msix_irqs(adapter);
1785 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
1786 err = request_irq(adapter->pdev->irq, &ixgbe_intr, 0,
1787 netdev->name, netdev);
1788 } else {
1789 err = request_irq(adapter->pdev->irq, &ixgbe_intr, IRQF_SHARED,
1790 netdev->name, netdev);
1791 }
1792
1793 if (err)
1794 DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err);
1795
1796 return err;
1797 }
1798
1799 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
1800 {
1801 struct net_device *netdev = adapter->netdev;
1802
1803 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1804 int i, q_vectors;
1805
1806 q_vectors = adapter->num_msix_vectors;
1807
1808 i = q_vectors - 1;
1809 free_irq(adapter->msix_entries[i].vector, netdev);
1810
1811 i--;
1812 for (; i >= 0; i--) {
1813 free_irq(adapter->msix_entries[i].vector,
1814 adapter->q_vector[i]);
1815 }
1816
1817 ixgbe_reset_q_vectors(adapter);
1818 } else {
1819 free_irq(adapter->pdev->irq, netdev);
1820 }
1821 }
1822
1823 /**
1824 * ixgbe_irq_disable - Mask off interrupt generation on the NIC
1825 * @adapter: board private structure
1826 **/
1827 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
1828 {
1829 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1830 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
1831 } else {
1832 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
1833 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
1834 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
1835 }
1836 IXGBE_WRITE_FLUSH(&adapter->hw);
1837 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1838 int i;
1839 for (i = 0; i < adapter->num_msix_vectors; i++)
1840 synchronize_irq(adapter->msix_entries[i].vector);
1841 } else {
1842 synchronize_irq(adapter->pdev->irq);
1843 }
1844 }
1845
1846 /**
1847 * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
1848 *
1849 **/
1850 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
1851 {
1852 struct ixgbe_hw *hw = &adapter->hw;
1853
1854 IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
1855 EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr_param));
1856
1857 ixgbe_set_ivar(adapter, 0, 0, 0);
1858 ixgbe_set_ivar(adapter, 1, 0, 0);
1859
1860 map_vector_to_rxq(adapter, 0, 0);
1861 map_vector_to_txq(adapter, 0, 0);
1862
1863 DPRINTK(HW, INFO, "Legacy interrupt IVAR setup done\n");
1864 }
1865
1866 /**
1867 * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
1868 * @adapter: board private structure
1869 *
1870 * Configure the Tx unit of the MAC after a reset.
1871 **/
1872 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
1873 {
1874 u64 tdba;
1875 struct ixgbe_hw *hw = &adapter->hw;
1876 u32 i, j, tdlen, txctrl;
1877
1878 /* Setup the HW Tx Head and Tail descriptor pointers */
1879 for (i = 0; i < adapter->num_tx_queues; i++) {
1880 struct ixgbe_ring *ring = &adapter->tx_ring[i];
1881 j = ring->reg_idx;
1882 tdba = ring->dma;
1883 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1884 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(j),
1885 (tdba & DMA_BIT_MASK(32)));
1886 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(j), (tdba >> 32));
1887 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(j), tdlen);
1888 IXGBE_WRITE_REG(hw, IXGBE_TDH(j), 0);
1889 IXGBE_WRITE_REG(hw, IXGBE_TDT(j), 0);
1890 adapter->tx_ring[i].head = IXGBE_TDH(j);
1891 adapter->tx_ring[i].tail = IXGBE_TDT(j);
1892 /*
1893 * Disable Tx Head Writeback RO bit, since this hoses
1894 * bookkeeping if things aren't delivered in order.
1895 */
1896 switch (hw->mac.type) {
1897 case ixgbe_mac_82598EB:
1898 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(j));
1899 break;
1900 case ixgbe_mac_82599EB:
1901 default:
1902 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(j));
1903 break;
1904 }
1905 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1906 switch (hw->mac.type) {
1907 case ixgbe_mac_82598EB:
1908 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(j), txctrl);
1909 break;
1910 case ixgbe_mac_82599EB:
1911 default:
1912 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(j), txctrl);
1913 break;
1914 }
1915 }
1916 if (hw->mac.type == ixgbe_mac_82599EB) {
1917 /* We enable 8 traffic classes, DCB only */
1918 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
1919 IXGBE_WRITE_REG(hw, IXGBE_MTQC, (IXGBE_MTQC_RT_ENA |
1920 IXGBE_MTQC_8TC_8TQ));
1921 }
1922 }
1923
1924 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1925
1926 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
1927 struct ixgbe_ring *rx_ring)
1928 {
1929 u32 srrctl;
1930 int index;
1931 struct ixgbe_ring_feature *feature = adapter->ring_feature;
1932
1933 index = rx_ring->reg_idx;
1934 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1935 unsigned long mask;
1936 mask = (unsigned long) feature[RING_F_RSS].mask;
1937 index = index & mask;
1938 }
1939 srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
1940
1941 srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
1942 srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
1943
1944 srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
1945 IXGBE_SRRCTL_BSIZEHDR_MASK;
1946
1947 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1948 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
1949 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1950 #else
1951 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1952 #endif
1953 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1954 } else {
1955 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
1956 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1957 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1958 }
1959
1960 IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
1961 }
1962
1963 static u32 ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
1964 {
1965 u32 mrqc = 0;
1966 int mask;
1967
1968 if (!(adapter->hw.mac.type == ixgbe_mac_82599EB))
1969 return mrqc;
1970
1971 mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
1972 #ifdef CONFIG_IXGBE_DCB
1973 | IXGBE_FLAG_DCB_ENABLED
1974 #endif
1975 );
1976
1977 switch (mask) {
1978 case (IXGBE_FLAG_RSS_ENABLED):
1979 mrqc = IXGBE_MRQC_RSSEN;
1980 break;
1981 #ifdef CONFIG_IXGBE_DCB
1982 case (IXGBE_FLAG_DCB_ENABLED):
1983 mrqc = IXGBE_MRQC_RT8TCEN;
1984 break;
1985 #endif /* CONFIG_IXGBE_DCB */
1986 default:
1987 break;
1988 }
1989
1990 return mrqc;
1991 }
1992
1993 /**
1994 * ixgbe_configure_rscctl - enable RSC for the indicated ring
1995 * @adapter: address of board private structure
1996 * @index: index of ring to set
1997 * @rx_buf_len: rx buffer length
1998 **/
1999 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter, int index,
2000 int rx_buf_len)
2001 {
2002 struct ixgbe_ring *rx_ring;
2003 struct ixgbe_hw *hw = &adapter->hw;
2004 int j;
2005 u32 rscctrl;
2006
2007 rx_ring = &adapter->rx_ring[index];
2008 j = rx_ring->reg_idx;
2009 rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(j));
2010 rscctrl |= IXGBE_RSCCTL_RSCEN;
2011 /*
2012 * we must limit the number of descriptors so that the
2013 * total size of max desc * buf_len is not greater
2014 * than 65535
2015 */
2016 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2017 #if (MAX_SKB_FRAGS > 16)
2018 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2019 #elif (MAX_SKB_FRAGS > 8)
2020 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2021 #elif (MAX_SKB_FRAGS > 4)
2022 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2023 #else
2024 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2025 #endif
2026 } else {
2027 if (rx_buf_len < IXGBE_RXBUFFER_4096)
2028 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2029 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
2030 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2031 else
2032 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2033 }
2034 IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(j), rscctrl);
2035 }
2036
2037 /**
2038 * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
2039 * @adapter: board private structure
2040 *
2041 * Configure the Rx unit of the MAC after a reset.
2042 **/
2043 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
2044 {
2045 u64 rdba;
2046 struct ixgbe_hw *hw = &adapter->hw;
2047 struct ixgbe_ring *rx_ring;
2048 struct net_device *netdev = adapter->netdev;
2049 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2050 int i, j;
2051 u32 rdlen, rxctrl, rxcsum;
2052 static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2053 0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2054 0x6A3E67EA, 0x14364D17, 0x3BED200D};
2055 u32 fctrl, hlreg0;
2056 u32 reta = 0, mrqc = 0;
2057 u32 rdrxctl;
2058 int rx_buf_len;
2059
2060 /* Decide whether to use packet split mode or not */
2061 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
2062
2063 /* Set the RX buffer length according to the mode */
2064 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
2065 rx_buf_len = IXGBE_RX_HDR_SIZE;
2066 if (hw->mac.type == ixgbe_mac_82599EB) {
2067 /* PSRTYPE must be initialized in 82599 */
2068 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
2069 IXGBE_PSRTYPE_UDPHDR |
2070 IXGBE_PSRTYPE_IPV4HDR |
2071 IXGBE_PSRTYPE_IPV6HDR |
2072 IXGBE_PSRTYPE_L2HDR;
2073 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(0), psrtype);
2074 }
2075 } else {
2076 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
2077 (netdev->mtu <= ETH_DATA_LEN))
2078 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
2079 else
2080 rx_buf_len = ALIGN(max_frame, 1024);
2081 }
2082
2083 fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
2084 fctrl |= IXGBE_FCTRL_BAM;
2085 fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
2086 fctrl |= IXGBE_FCTRL_PMCF;
2087 IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
2088
2089 hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
2090 if (adapter->netdev->mtu <= ETH_DATA_LEN)
2091 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
2092 else
2093 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2094 #ifdef IXGBE_FCOE
2095 if (netdev->features & NETIF_F_FCOE_MTU)
2096 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2097 #endif
2098 IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
2099
2100 rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
2101 /* disable receives while setting up the descriptors */
2102 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2103 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2104
2105 /*
2106 * Setup the HW Rx Head and Tail Descriptor Pointers and
2107 * the Base and Length of the Rx Descriptor Ring
2108 */
2109 for (i = 0; i < adapter->num_rx_queues; i++) {
2110 rx_ring = &adapter->rx_ring[i];
2111 rdba = rx_ring->dma;
2112 j = rx_ring->reg_idx;
2113 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(j), (rdba & DMA_BIT_MASK(32)));
2114 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(j), (rdba >> 32));
2115 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(j), rdlen);
2116 IXGBE_WRITE_REG(hw, IXGBE_RDH(j), 0);
2117 IXGBE_WRITE_REG(hw, IXGBE_RDT(j), 0);
2118 rx_ring->head = IXGBE_RDH(j);
2119 rx_ring->tail = IXGBE_RDT(j);
2120 rx_ring->rx_buf_len = rx_buf_len;
2121
2122 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
2123 rx_ring->flags |= IXGBE_RING_RX_PS_ENABLED;
2124 else
2125 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2126
2127 #ifdef IXGBE_FCOE
2128 if (netdev->features & NETIF_F_FCOE_MTU) {
2129 struct ixgbe_ring_feature *f;
2130 f = &adapter->ring_feature[RING_F_FCOE];
2131 if ((i >= f->mask) && (i < f->mask + f->indices)) {
2132 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2133 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
2134 rx_ring->rx_buf_len =
2135 IXGBE_FCOE_JUMBO_FRAME_SIZE;
2136 }
2137 }
2138
2139 #endif /* IXGBE_FCOE */
2140 ixgbe_configure_srrctl(adapter, rx_ring);
2141 }
2142
2143 if (hw->mac.type == ixgbe_mac_82598EB) {
2144 /*
2145 * For VMDq support of different descriptor types or
2146 * buffer sizes through the use of multiple SRRCTL
2147 * registers, RDRXCTL.MVMEN must be set to 1
2148 *
2149 * also, the manual doesn't mention it clearly but DCA hints
2150 * will only use queue 0's tags unless this bit is set. Side
2151 * effects of setting this bit are only that SRRCTL must be
2152 * fully programmed [0..15]
2153 */
2154 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2155 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
2156 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2157 }
2158
2159 /* Program MRQC for the distribution of queues */
2160 mrqc = ixgbe_setup_mrqc(adapter);
2161
2162 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
2163 /* Fill out redirection table */
2164 for (i = 0, j = 0; i < 128; i++, j++) {
2165 if (j == adapter->ring_feature[RING_F_RSS].indices)
2166 j = 0;
2167 /* reta = 4-byte sliding window of
2168 * 0x00..(indices-1)(indices-1)00..etc. */
2169 reta = (reta << 8) | (j * 0x11);
2170 if ((i & 3) == 3)
2171 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2172 }
2173
2174 /* Fill out hash function seeds */
2175 for (i = 0; i < 10; i++)
2176 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2177
2178 if (hw->mac.type == ixgbe_mac_82598EB)
2179 mrqc |= IXGBE_MRQC_RSSEN;
2180 /* Perform hash on these packet types */
2181 mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2182 | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2183 | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
2184 | IXGBE_MRQC_RSS_FIELD_IPV6
2185 | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
2186 | IXGBE_MRQC_RSS_FIELD_IPV6_UDP;
2187 }
2188 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2189
2190 rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2191
2192 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED ||
2193 adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
2194 /* Disable indicating checksum in descriptor, enables
2195 * RSS hash */
2196 rxcsum |= IXGBE_RXCSUM_PCSD;
2197 }
2198 if (!(rxcsum & IXGBE_RXCSUM_PCSD)) {
2199 /* Enable IPv4 payload checksum for UDP fragments
2200 * if PCSD is not set */
2201 rxcsum |= IXGBE_RXCSUM_IPPCSE;
2202 }
2203
2204 IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2205
2206 if (hw->mac.type == ixgbe_mac_82599EB) {
2207 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2208 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
2209 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
2210 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2211 }
2212
2213 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
2214 /* Enable 82599 HW-RSC */
2215 for (i = 0; i < adapter->num_rx_queues; i++)
2216 ixgbe_configure_rscctl(adapter, i, rx_buf_len);
2217
2218 /* Disable RSC for ACK packets */
2219 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
2220 (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
2221 }
2222 }
2223
2224 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2225 {
2226 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2227 struct ixgbe_hw *hw = &adapter->hw;
2228
2229 /* add VID to filter table */
2230 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, true);
2231 }
2232
2233 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2234 {
2235 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2236 struct ixgbe_hw *hw = &adapter->hw;
2237
2238 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2239 ixgbe_irq_disable(adapter);
2240
2241 vlan_group_set_device(adapter->vlgrp, vid, NULL);
2242
2243 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2244 ixgbe_irq_enable(adapter);
2245
2246 /* remove VID from filter table */
2247 hw->mac.ops.set_vfta(&adapter->hw, vid, 0, false);
2248 }
2249
2250 static void ixgbe_vlan_rx_register(struct net_device *netdev,
2251 struct vlan_group *grp)
2252 {
2253 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2254 u32 ctrl;
2255 int i, j;
2256
2257 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2258 ixgbe_irq_disable(adapter);
2259 adapter->vlgrp = grp;
2260
2261 /*
2262 * For a DCB driver, always enable VLAN tag stripping so we can
2263 * still receive traffic from a DCB-enabled host even if we're
2264 * not in DCB mode.
2265 */
2266 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
2267 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2268 ctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2269 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
2270 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
2271 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
2272 ctrl |= IXGBE_VLNCTRL_VFE;
2273 /* enable VLAN tag insert/strip */
2274 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
2275 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
2276 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
2277 for (i = 0; i < adapter->num_rx_queues; i++) {
2278 j = adapter->rx_ring[i].reg_idx;
2279 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXDCTL(j));
2280 ctrl |= IXGBE_RXDCTL_VME;
2281 IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXDCTL(j), ctrl);
2282 }
2283 }
2284 ixgbe_vlan_rx_add_vid(netdev, 0);
2285
2286 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2287 ixgbe_irq_enable(adapter);
2288 }
2289
2290 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
2291 {
2292 ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2293
2294 if (adapter->vlgrp) {
2295 u16 vid;
2296 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2297 if (!vlan_group_get_device(adapter->vlgrp, vid))
2298 continue;
2299 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
2300 }
2301 }
2302 }
2303
2304 static u8 *ixgbe_addr_list_itr(struct ixgbe_hw *hw, u8 **mc_addr_ptr, u32 *vmdq)
2305 {
2306 struct dev_mc_list *mc_ptr;
2307 u8 *addr = *mc_addr_ptr;
2308 *vmdq = 0;
2309
2310 mc_ptr = container_of(addr, struct dev_mc_list, dmi_addr[0]);
2311 if (mc_ptr->next)
2312 *mc_addr_ptr = mc_ptr->next->dmi_addr;
2313 else
2314 *mc_addr_ptr = NULL;
2315
2316 return addr;
2317 }
2318
2319 /**
2320 * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
2321 * @netdev: network interface device structure
2322 *
2323 * The set_rx_method entry point is called whenever the unicast/multicast
2324 * address list or the network interface flags are updated. This routine is
2325 * responsible for configuring the hardware for proper unicast, multicast and
2326 * promiscuous mode.
2327 **/
2328 static void ixgbe_set_rx_mode(struct net_device *netdev)
2329 {
2330 struct ixgbe_adapter *adapter = netdev_priv(netdev);
2331 struct ixgbe_hw *hw = &adapter->hw;
2332 u32 fctrl, vlnctrl;
2333 u8 *addr_list = NULL;
2334 int addr_count = 0;
2335
2336 /* Check for Promiscuous and All Multicast modes */
2337
2338 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
2339 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2340
2341 if (netdev->flags & IFF_PROMISC) {
2342 hw->addr_ctrl.user_set_promisc = 1;
2343 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2344 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
2345 } else {
2346 if (netdev->flags & IFF_ALLMULTI) {
2347 fctrl |= IXGBE_FCTRL_MPE;
2348 fctrl &= ~IXGBE_FCTRL_UPE;
2349 } else {
2350 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
2351 }
2352 vlnctrl |= IXGBE_VLNCTRL_VFE;
2353 hw->addr_ctrl.user_set_promisc = 0;
2354 }
2355
2356 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
2357 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2358
2359 /* reprogram secondary unicast list */
2360 hw->mac.ops.update_uc_addr_list(hw, &netdev->uc.list);
2361
2362 /* reprogram multicast list */
2363 addr_count = netdev->mc_count;
2364 if (addr_count)
2365 addr_list = netdev->mc_list->dmi_addr;
2366 hw->mac.ops.update_mc_addr_list(hw, addr_list, addr_count,
2367 ixgbe_addr_list_itr);
2368 }
2369
2370 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
2371 {
2372 int q_idx;
2373 struct ixgbe_q_vector *q_vector;
2374 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2375
2376 /* legacy and MSI only use one vector */
2377 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2378 q_vectors = 1;
2379
2380 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2381 struct napi_struct *napi;
2382 q_vector = adapter->q_vector[q_idx];
2383 napi = &q_vector->napi;
2384 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2385 if (!q_vector->rxr_count || !q_vector->txr_count) {
2386 if (q_vector->txr_count == 1)
2387 napi->poll = &ixgbe_clean_txonly;
2388 else if (q_vector->rxr_count == 1)
2389 napi->poll = &ixgbe_clean_rxonly;
2390 }
2391 }
2392
2393 napi_enable(napi);
2394 }
2395 }
2396
2397 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
2398 {
2399 int q_idx;
2400 struct ixgbe_q_vector *q_vector;
2401 int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2402
2403 /* legacy and MSI only use one vector */
2404 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2405 q_vectors = 1;
2406
2407 for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2408 q_vector = adapter->q_vector[q_idx];
2409 napi_disable(&q_vector->napi);
2410 }
2411 }
2412
2413 #ifdef CONFIG_IXGBE_DCB
2414 /*
2415 * ixgbe_configure_dcb - Configure DCB hardware
2416 * @adapter: ixgbe adapter struct
2417 *
2418 * This is called by the driver on open to configure the DCB hardware.
2419 * This is also called by the gennetlink interface when reconfiguring
2420 * the DCB state.
2421 */
2422 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
2423 {
2424 struct ixgbe_hw *hw = &adapter->hw;
2425 u32 txdctl, vlnctrl;
2426 int i, j;
2427
2428 ixgbe_dcb_check_config(&adapter->dcb_cfg);
2429 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_TX_CONFIG);
2430 ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_RX_CONFIG);
2431
2432 /* reconfigure the hardware */
2433 ixgbe_dcb_hw_config(&adapter->hw, &adapter->dcb_cfg);
2434
2435 for (i = 0; i < adapter->num_tx_queues; i++) {
2436 j = adapter->tx_ring[i].reg_idx;
2437 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2438 /* PThresh workaround for Tx hang with DFP enabled. */
2439 txdctl |= 32;
2440 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2441 }
2442 /* Enable VLAN tag insert/strip */
2443 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2444 if (hw->mac.type == ixgbe_mac_82598EB) {
2445 vlnctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2446 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2447 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2448 } else if (hw->mac.type == ixgbe_mac_82599EB) {
2449 vlnctrl |= IXGBE_VLNCTRL_VFE;
2450 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2451 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2452 for (i = 0; i < adapter->num_rx_queues; i++) {
2453 j = adapter->rx_ring[i].reg_idx;
2454 vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2455 vlnctrl |= IXGBE_RXDCTL_VME;
2456 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
2457 }
2458 }
2459 hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
2460 }
2461
2462 #endif
2463 static void ixgbe_configure(struct ixgbe_adapter *adapter)
2464 {
2465 struct net_device *netdev = adapter->netdev;
2466 struct ixgbe_hw *hw = &adapter->hw;
2467 int i;
2468
2469 ixgbe_set_rx_mode(netdev);
2470
2471 ixgbe_restore_vlan(adapter);
2472 #ifdef CONFIG_IXGBE_DCB
2473 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
2474 netif_set_gso_max_size(netdev, 32768);
2475 ixgbe_configure_dcb(adapter);
2476 } else {
2477 netif_set_gso_max_size(netdev, 65536);
2478 }
2479 #else
2480 netif_set_gso_max_size(netdev, 65536);
2481 #endif
2482
2483 #ifdef IXGBE_FCOE
2484 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
2485 ixgbe_configure_fcoe(adapter);
2486
2487 #endif /* IXGBE_FCOE */
2488 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2489 for (i = 0; i < adapter->num_tx_queues; i++)
2490 adapter->tx_ring[i].atr_sample_rate =
2491 adapter->atr_sample_rate;
2492 ixgbe_init_fdir_signature_82599(hw, adapter->fdir_pballoc);
2493 } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
2494 ixgbe_init_fdir_perfect_82599(hw, adapter->fdir_pballoc);
2495 }
2496
2497 ixgbe_configure_tx(adapter);
2498 ixgbe_configure_rx(adapter);
2499 for (i = 0; i < adapter->num_rx_queues; i++)
2500 ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i],
2501 (adapter->rx_ring[i].count - 1));
2502 }
2503
2504 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
2505 {
2506 switch (hw->phy.type) {
2507 case ixgbe_phy_sfp_avago:
2508 case ixgbe_phy_sfp_ftl:
2509 case ixgbe_phy_sfp_intel:
2510 case ixgbe_phy_sfp_unknown:
2511 case ixgbe_phy_tw_tyco:
2512 case ixgbe_phy_tw_unknown:
2513 return true;
2514 default:
2515 return false;
2516 }
2517 }
2518
2519 /**
2520 * ixgbe_sfp_link_config - set up SFP+ link
2521 * @adapter: pointer to private adapter struct
2522 **/
2523 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
2524 {
2525 struct ixgbe_hw *hw = &adapter->hw;
2526
2527 if (hw->phy.multispeed_fiber) {
2528 /*
2529 * In multispeed fiber setups, the device may not have
2530 * had a physical connection when the driver loaded.
2531 * If that's the case, the initial link configuration
2532 * couldn't get the MAC into 10G or 1G mode, so we'll
2533 * never have a link status change interrupt fire.
2534 * We need to try and force an autonegotiation
2535 * session, then bring up link.
2536 */
2537 hw->mac.ops.setup_sfp(hw);
2538 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
2539 schedule_work(&adapter->multispeed_fiber_task);
2540 } else {
2541 /*
2542 * Direct Attach Cu and non-multispeed fiber modules
2543 * still need to be configured properly prior to
2544 * attempting link.
2545 */
2546 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_MOD_TASK))
2547 schedule_work(&adapter->sfp_config_module_task);
2548 }
2549 }
2550
2551 /**
2552 * ixgbe_non_sfp_link_config - set up non-SFP+ link
2553 * @hw: pointer to private hardware struct
2554 *
2555 * Returns 0 on success, negative on failure
2556 **/
2557 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
2558 {
2559 u32 autoneg;
2560 bool negotiation, link_up = false;
2561 u32 ret = IXGBE_ERR_LINK_SETUP;
2562
2563 if (hw->mac.ops.check_link)
2564 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
2565
2566 if (ret)
2567 goto link_cfg_out;
2568
2569 if (hw->mac.ops.get_link_capabilities)
2570 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
2571 if (ret)
2572 goto link_cfg_out;
2573
2574 if (hw->mac.ops.setup_link)
2575 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
2576 link_cfg_out:
2577 return ret;
2578 }
2579
2580 #define IXGBE_MAX_RX_DESC_POLL 10
2581 static inline void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
2582 int rxr)
2583 {
2584 int j = adapter->rx_ring[rxr].reg_idx;
2585 int k;
2586
2587 for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) {
2588 if (IXGBE_READ_REG(&adapter->hw,
2589 IXGBE_RXDCTL(j)) & IXGBE_RXDCTL_ENABLE)
2590 break;
2591 else
2592 msleep(1);
2593 }
2594 if (k >= IXGBE_MAX_RX_DESC_POLL) {
2595 DPRINTK(DRV, ERR, "RXDCTL.ENABLE on Rx queue %d "
2596 "not set within the polling period\n", rxr);
2597 }
2598 ixgbe_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr],
2599 (adapter->rx_ring[rxr].count - 1));
2600 }
2601
2602 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
2603 {
2604 struct net_device *netdev = adapter->netdev;
2605 struct ixgbe_hw *hw = &adapter->hw;
2606 int i, j = 0;
2607 int num_rx_rings = adapter->num_rx_queues;
2608 int err;
2609 int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2610 u32 txdctl, rxdctl, mhadd;
2611 u32 dmatxctl;
2612 u32 gpie;
2613
2614 ixgbe_get_hw_control(adapter);
2615
2616 if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) ||
2617 (adapter->flags & IXGBE_FLAG_MSI_ENABLED)) {
2618 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2619 gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
2620 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
2621 } else {
2622 /* MSI only */
2623 gpie = 0;
2624 }
2625 /* XXX: to interrupt immediately for EICS writes, enable this */
2626 /* gpie |= IXGBE_GPIE_EIMEN; */
2627 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2628 }
2629
2630 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
2631 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
2632 * specifically only auto mask tx and rx interrupts */
2633 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
2634 }
2635
2636 /* Enable fan failure interrupt if media type is copper */
2637 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2638 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2639 gpie |= IXGBE_SDP1_GPIEN;
2640 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2641 }
2642
2643 if (hw->mac.type == ixgbe_mac_82599EB) {
2644 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
2645 gpie |= IXGBE_SDP1_GPIEN;
2646 gpie |= IXGBE_SDP2_GPIEN;
2647 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
2648 }
2649
2650 #ifdef IXGBE_FCOE
2651 /* adjust max frame to be able to do baby jumbo for FCoE */
2652 if ((netdev->features & NETIF_F_FCOE_MTU) &&
2653 (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
2654 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
2655
2656 #endif /* IXGBE_FCOE */
2657 mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
2658 if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
2659 mhadd &= ~IXGBE_MHADD_MFS_MASK;
2660 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
2661
2662 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
2663 }
2664
2665 for (i = 0; i < adapter->num_tx_queues; i++) {
2666 j = adapter->tx_ring[i].reg_idx;
2667 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2668 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
2669 txdctl |= (8 << 16);
2670 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2671 }
2672
2673 if (hw->mac.type == ixgbe_mac_82599EB) {
2674 /* DMATXCTL.EN must be set after all Tx queue config is done */
2675 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2676 dmatxctl |= IXGBE_DMATXCTL_TE;
2677 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2678 }
2679 for (i = 0; i < adapter->num_tx_queues; i++) {
2680 j = adapter->tx_ring[i].reg_idx;
2681 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2682 txdctl |= IXGBE_TXDCTL_ENABLE;
2683 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
2684 }
2685
2686 for (i = 0; i < num_rx_rings; i++) {
2687 j = adapter->rx_ring[i].reg_idx;
2688 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2689 /* enable PTHRESH=32 descriptors (half the internal cache)
2690 * and HTHRESH=0 descriptors (to minimize latency on fetch),
2691 * this also removes a pesky rx_no_buffer_count increment */
2692 rxdctl |= 0x0020;
2693 rxdctl |= IXGBE_RXDCTL_ENABLE;
2694 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), rxdctl);
2695 if (hw->mac.type == ixgbe_mac_82599EB)
2696 ixgbe_rx_desc_queue_enable(adapter, i);
2697 }
2698 /* enable all receives */
2699 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2700 if (hw->mac.type == ixgbe_mac_82598EB)
2701 rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
2702 else
2703 rxdctl |= IXGBE_RXCTRL_RXEN;
2704 hw->mac.ops.enable_rx_dma(hw, rxdctl);
2705
2706 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2707 ixgbe_configure_msix(adapter);
2708 else
2709 ixgbe_configure_msi_and_legacy(adapter);
2710
2711 clear_bit(__IXGBE_DOWN, &adapter->state);
2712 ixgbe_napi_enable_all(adapter);
2713
2714 /* clear any pending interrupts, may auto mask */
2715 IXGBE_READ_REG(hw, IXGBE_EICR);
2716
2717 ixgbe_irq_enable(adapter);
2718
2719 /*
2720 * If this adapter has a fan, check to see if we had a failure
2721 * before we enabled the interrupt.
2722 */
2723 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
2724 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
2725 if (esdp & IXGBE_ESDP_SDP1)
2726 DPRINTK(DRV, CRIT,
2727 "Fan has stopped, replace the adapter\n");
2728 }
2729
2730 /*
2731 * For hot-pluggable SFP+ devices, a new SFP+ module may have
2732 * arrived before interrupts were enabled but after probe. Such
2733 * devices wouldn't have their type identified yet. We need to
2734 * kick off the SFP+ module setup first, then try to bring up link.
2735 * If we're not hot-pluggable SFP+, we just need to configure link
2736 * and bring it up.
2737 */
2738 if (hw->phy.type == ixgbe_phy_unknown) {
2739 err = hw->phy.ops.identify(hw);
2740 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
2741 /*
2742 * Take the device down and schedule the sfp tasklet
2743 * which will unregister_netdev and log it.
2744 */
2745 ixgbe_down(adapter);
2746 schedule_work(&adapter->sfp_config_module_task);
2747 return err;
2748 }
2749 }
2750
2751 if (ixgbe_is_sfp(hw)) {
2752 ixgbe_sfp_link_config(adapter);
2753 } else {
2754 err = ixgbe_non_sfp_link_config(hw);
2755 if (err)
2756 DPRINTK(PROBE, ERR, "link_config FAILED %d\n", err);
2757 }
2758
2759 for (i = 0; i < adapter->num_tx_queues; i++)
2760 set_bit(__IXGBE_FDIR_INIT_DONE,
2761 &(adapter->tx_ring[i].reinit_state));
2762
2763 /* enable transmits */
2764 netif_tx_start_all_queues(netdev);
2765
2766 /* bring the link up in the watchdog, this could race with our first
2767 * link up interrupt but shouldn't be a problem */
2768 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
2769 adapter->link_check_timeout = jiffies;
2770 mod_timer(&adapter->watchdog_timer, jiffies);
2771 return 0;
2772 }
2773
2774 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
2775 {
2776 WARN_ON(in_interrupt());
2777 while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
2778 msleep(1);
2779 ixgbe_down(adapter);
2780 ixgbe_up(adapter);
2781 clear_bit(__IXGBE_RESETTING, &adapter->state);
2782 }
2783
2784 int ixgbe_up(struct ixgbe_adapter *adapter)
2785 {
2786 /* hardware has been reset, we need to reload some things */
2787 ixgbe_configure(adapter);
2788
2789 return ixgbe_up_complete(adapter);
2790 }
2791
2792 void ixgbe_reset(struct ixgbe_adapter *adapter)
2793 {
2794 struct ixgbe_hw *hw = &adapter->hw;
2795 int err;
2796
2797 err = hw->mac.ops.init_hw(hw);
2798 switch (err) {
2799 case 0:
2800 case IXGBE_ERR_SFP_NOT_PRESENT:
2801 break;
2802 case IXGBE_ERR_MASTER_REQUESTS_PENDING:
2803 dev_err(&adapter->pdev->dev, "master disable timed out\n");
2804 break;
2805 case IXGBE_ERR_EEPROM_VERSION:
2806 /* We are running on a pre-production device, log a warning */
2807 dev_warn(&adapter->pdev->dev, "This device is a pre-production "
2808 "adapter/LOM. Please be aware there may be issues "
2809 "associated with your hardware. If you are "
2810 "experiencing problems please contact your Intel or "
2811 "hardware representative who provided you with this "
2812 "hardware.\n");
2813 break;
2814 default:
2815 dev_err(&adapter->pdev->dev, "Hardware Error: %d\n", err);
2816 }
2817
2818 /* reprogram the RAR[0] in case user changed it. */
2819 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
2820 }
2821
2822 /**
2823 * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
2824 * @adapter: board private structure
2825 * @rx_ring: ring to free buffers from
2826 **/
2827 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
2828 struct ixgbe_ring *rx_ring)
2829 {
2830 struct pci_dev *pdev = adapter->pdev;
2831 unsigned long size;
2832 unsigned int i;
2833
2834 /* Free all the Rx ring sk_buffs */
2835
2836 for (i = 0; i < rx_ring->count; i++) {
2837 struct ixgbe_rx_buffer *rx_buffer_info;
2838
2839 rx_buffer_info = &rx_ring->rx_buffer_info[i];
2840 if (rx_buffer_info->dma) {
2841 pci_unmap_single(pdev, rx_buffer_info->dma,
2842 rx_ring->rx_buf_len,
2843 PCI_DMA_FROMDEVICE);
2844 rx_buffer_info->dma = 0;
2845 }
2846 if (rx_buffer_info->skb) {
2847 struct sk_buff *skb = rx_buffer_info->skb;
2848 rx_buffer_info->skb = NULL;
2849 do {
2850 struct sk_buff *this = skb;
2851 skb = skb->prev;
2852 dev_kfree_skb(this);
2853 } while (skb);
2854 }
2855 if (!rx_buffer_info->page)
2856 continue;
2857 if (rx_buffer_info->page_dma) {
2858 pci_unmap_page(pdev, rx_buffer_info->page_dma,
2859 PAGE_SIZE / 2, PCI_DMA_FROMDEVICE);
2860 rx_buffer_info->page_dma = 0;
2861 }
2862 put_page(rx_buffer_info->page);
2863 rx_buffer_info->page = NULL;
2864 rx_buffer_info->page_offset = 0;
2865 }
2866
2867 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
2868 memset(rx_ring->rx_buffer_info, 0, size);
2869
2870 /* Zero out the descriptor ring */
2871 memset(rx_ring->desc, 0, rx_ring->size);
2872
2873 rx_ring->next_to_clean = 0;
2874 rx_ring->next_to_use = 0;
2875
2876 if (rx_ring->head)
2877 writel(0, adapter->hw.hw_addr + rx_ring->head);
2878 if (rx_ring->tail)
2879 writel(0, adapter->hw.hw_addr + rx_ring->tail);
2880 }
2881
2882 /**
2883 * ixgbe_clean_tx_ring - Free Tx Buffers
2884 * @adapter: board private structure
2885 * @tx_ring: ring to be cleaned
2886 **/
2887 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
2888 struct ixgbe_ring *tx_ring)
2889 {
2890 struct ixgbe_tx_buffer *tx_buffer_info;
2891 unsigned long size;
2892 unsigned int i;
2893
2894 /* Free all the Tx ring sk_buffs */
2895
2896 for (i = 0; i < tx_ring->count; i++) {
2897 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2898 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
2899 }
2900
2901 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
2902 memset(tx_ring->tx_buffer_info, 0, size);
2903
2904 /* Zero out the descriptor ring */
2905 memset(tx_ring->desc, 0, tx_ring->size);
2906
2907 tx_ring->next_to_use = 0;
2908 tx_ring->next_to_clean = 0;
2909
2910 if (tx_ring->head)
2911 writel(0, adapter->hw.hw_addr + tx_ring->head);
2912 if (tx_ring->tail)
2913 writel(0, adapter->hw.hw_addr + tx_ring->tail);
2914 }
2915
2916 /**
2917 * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
2918 * @adapter: board private structure
2919 **/
2920 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
2921 {
2922 int i;
2923
2924 for (i = 0; i < adapter->num_rx_queues; i++)
2925 ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
2926 }
2927
2928 /**
2929 * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
2930 * @adapter: board private structure
2931 **/
2932 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
2933 {
2934 int i;
2935
2936 for (i = 0; i < adapter->num_tx_queues; i++)
2937 ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
2938 }
2939
2940 void ixgbe_down(struct ixgbe_adapter *adapter)
2941 {
2942 struct net_device *netdev = adapter->netdev;
2943 struct ixgbe_hw *hw = &adapter->hw;
2944 u32 rxctrl;
2945 u32 txdctl;
2946 int i, j;
2947
2948 /* signal that we are down to the interrupt handler */
2949 set_bit(__IXGBE_DOWN, &adapter->state);
2950
2951 /* disable receives */
2952 rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2953 IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2954
2955 netif_tx_disable(netdev);
2956
2957 IXGBE_WRITE_FLUSH(hw);
2958 msleep(10);
2959
2960 netif_tx_stop_all_queues(netdev);
2961
2962 ixgbe_irq_disable(adapter);
2963
2964 ixgbe_napi_disable_all(adapter);
2965
2966 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
2967 del_timer_sync(&adapter->sfp_timer);
2968 del_timer_sync(&adapter->watchdog_timer);
2969 cancel_work_sync(&adapter->watchdog_task);
2970
2971 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
2972 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
2973 cancel_work_sync(&adapter->fdir_reinit_task);
2974
2975 /* disable transmits in the hardware now that interrupts are off */
2976 for (i = 0; i < adapter->num_tx_queues; i++) {
2977 j = adapter->tx_ring[i].reg_idx;
2978 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
2979 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
2980 (txdctl & ~IXGBE_TXDCTL_ENABLE));
2981 }
2982 /* Disable the Tx DMA engine on 82599 */
2983 if (hw->mac.type == ixgbe_mac_82599EB)
2984 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
2985 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
2986 ~IXGBE_DMATXCTL_TE));
2987
2988 netif_carrier_off(netdev);
2989
2990 if (!pci_channel_offline(adapter->pdev))
2991 ixgbe_reset(adapter);
2992 ixgbe_clean_all_tx_rings(adapter);
2993 ixgbe_clean_all_rx_rings(adapter);
2994
2995 #ifdef CONFIG_IXGBE_DCA
2996 /* since we reset the hardware DCA settings were cleared */
2997 ixgbe_setup_dca(adapter);
2998 #endif
2999 }
3000
3001 /**
3002 * ixgbe_poll - NAPI Rx polling callback
3003 * @napi: structure for representing this polling device
3004 * @budget: how many packets driver is allowed to clean
3005 *
3006 * This function is used for legacy and MSI, NAPI mode
3007 **/
3008 static int ixgbe_poll(struct napi_struct *napi, int budget)
3009 {
3010 struct ixgbe_q_vector *q_vector =
3011 container_of(napi, struct ixgbe_q_vector, napi);
3012 struct ixgbe_adapter *adapter = q_vector->adapter;
3013 int tx_clean_complete, work_done = 0;
3014
3015 #ifdef CONFIG_IXGBE_DCA
3016 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
3017 ixgbe_update_tx_dca(adapter, adapter->tx_ring);
3018 ixgbe_update_rx_dca(adapter, adapter->rx_ring);
3019 }
3020 #endif
3021
3022 tx_clean_complete = ixgbe_clean_tx_irq(q_vector, adapter->tx_ring);
3023 ixgbe_clean_rx_irq(q_vector, adapter->rx_ring, &work_done, budget);
3024
3025 if (!tx_clean_complete)
3026 work_done = budget;
3027
3028 /* If budget not fully consumed, exit the polling mode */
3029 if (work_done < budget) {
3030 napi_complete(napi);
3031 if (adapter->rx_itr_setting & 1)
3032 ixgbe_set_itr(adapter);
3033 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3034 ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
3035 }
3036 return work_done;
3037 }
3038
3039 /**
3040 * ixgbe_tx_timeout - Respond to a Tx Hang
3041 * @netdev: network interface device structure
3042 **/
3043 static void ixgbe_tx_timeout(struct net_device *netdev)
3044 {
3045 struct ixgbe_adapter *adapter = netdev_priv(netdev);
3046
3047 /* Do the reset outside of interrupt context */
3048 schedule_work(&adapter->reset_task);
3049 }
3050
3051 static void ixgbe_reset_task(struct work_struct *work)
3052 {
3053 struct ixgbe_adapter *adapter;
3054 adapter = container_of(work, struct ixgbe_adapter, reset_task);
3055
3056 /* If we're already down or resetting, just bail */
3057 if (test_bit(__IXGBE_DOWN, &adapter->state) ||
3058 test_bit(__IXGBE_RESETTING, &adapter->state))
3059 return;
3060
3061 adapter->tx_timeout_count++;
3062
3063 ixgbe_reinit_locked(adapter);
3064 }
3065
3066 #ifdef CONFIG_IXGBE_DCB
3067 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
3068 {
3069 bool ret = false;
3070 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_DCB];
3071
3072 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
3073 return ret;
3074
3075 f->mask = 0x7 << 3;
3076 adapter->num_rx_queues = f->indices;
3077 adapter->num_tx_queues = f->indices;
3078 ret = true;
3079
3080 return ret;
3081 }
3082 #endif
3083
3084 /**
3085 * ixgbe_set_rss_queues: Allocate queues for RSS
3086 * @adapter: board private structure to initialize
3087 *
3088 * This is our "base" multiqueue mode. RSS (Receive Side Scaling) will try
3089 * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
3090 *
3091 **/
3092 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
3093 {
3094 bool ret = false;
3095 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
3096
3097 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3098 f->mask = 0xF;
3099 adapter->num_rx_queues = f->indices;
3100 adapter->num_tx_queues = f->indices;
3101 ret = true;
3102 } else {
3103 ret = false;
3104 }
3105
3106 return ret;
3107 }
3108
3109 /**
3110 * ixgbe_set_fdir_queues: Allocate queues for Flow Director
3111 * @adapter: board private structure to initialize
3112 *
3113 * Flow Director is an advanced Rx filter, attempting to get Rx flows back
3114 * to the original CPU that initiated the Tx session. This runs in addition
3115 * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
3116 * Rx load across CPUs using RSS.
3117 *
3118 **/
3119 static bool inline ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
3120 {
3121 bool ret = false;
3122 struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
3123
3124 f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
3125 f_fdir->mask = 0;
3126
3127 /* Flow Director must have RSS enabled */
3128 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3129 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3130 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)))) {
3131 adapter->num_tx_queues = f_fdir->indices;
3132 adapter->num_rx_queues = f_fdir->indices;
3133 ret = true;
3134 } else {
3135 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3136 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3137 }
3138 return ret;
3139 }
3140
3141 #ifdef IXGBE_FCOE
3142 /**
3143 * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
3144 * @adapter: board private structure to initialize
3145 *
3146 * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
3147 * The ring feature mask is not used as a mask for FCoE, as it can take any 8
3148 * rx queues out of the max number of rx queues, instead, it is used as the
3149 * index of the first rx queue used by FCoE.
3150 *
3151 **/
3152 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
3153 {
3154 bool ret = false;
3155 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3156
3157 f->indices = min((int)num_online_cpus(), f->indices);
3158 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3159 adapter->num_rx_queues = 1;
3160 adapter->num_tx_queues = 1;
3161 #ifdef CONFIG_IXGBE_DCB
3162 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3163 DPRINTK(PROBE, INFO, "FCoE enabled with DCB \n");
3164 ixgbe_set_dcb_queues(adapter);
3165 }
3166 #endif
3167 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3168 DPRINTK(PROBE, INFO, "FCoE enabled with RSS \n");
3169 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3170 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3171 ixgbe_set_fdir_queues(adapter);
3172 else
3173 ixgbe_set_rss_queues(adapter);
3174 }
3175 /* adding FCoE rx rings to the end */
3176 f->mask = adapter->num_rx_queues;
3177 adapter->num_rx_queues += f->indices;
3178 adapter->num_tx_queues += f->indices;
3179
3180 ret = true;
3181 }
3182
3183 return ret;
3184 }
3185
3186 #endif /* IXGBE_FCOE */
3187 /*
3188 * ixgbe_set_num_queues: Allocate queues for device, feature dependant
3189 * @adapter: board private structure to initialize
3190 *
3191 * This is the top level queue allocation routine. The order here is very
3192 * important, starting with the "most" number of features turned on at once,
3193 * and ending with the smallest set of features. This way large combinations
3194 * can be allocated if they're turned on, and smaller combinations are the
3195 * fallthrough conditions.
3196 *
3197 **/
3198 static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
3199 {
3200 #ifdef IXGBE_FCOE
3201 if (ixgbe_set_fcoe_queues(adapter))
3202 goto done;
3203
3204 #endif /* IXGBE_FCOE */
3205 #ifdef CONFIG_IXGBE_DCB
3206 if (ixgbe_set_dcb_queues(adapter))
3207 goto done;
3208
3209 #endif
3210 if (ixgbe_set_fdir_queues(adapter))
3211 goto done;
3212
3213 if (ixgbe_set_rss_queues(adapter))
3214 goto done;
3215
3216 /* fallback to base case */
3217 adapter->num_rx_queues = 1;
3218 adapter->num_tx_queues = 1;
3219
3220 done:
3221 /* Notify the stack of the (possibly) reduced Tx Queue count. */
3222 adapter->netdev->real_num_tx_queues = adapter->num_tx_queues;
3223 }
3224
3225 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
3226 int vectors)
3227 {
3228 int err, vector_threshold;
3229
3230 /* We'll want at least 3 (vector_threshold):
3231 * 1) TxQ[0] Cleanup
3232 * 2) RxQ[0] Cleanup
3233 * 3) Other (Link Status Change, etc.)
3234 * 4) TCP Timer (optional)
3235 */
3236 vector_threshold = MIN_MSIX_COUNT;
3237
3238 /* The more we get, the more we will assign to Tx/Rx Cleanup
3239 * for the separate queues...where Rx Cleanup >= Tx Cleanup.
3240 * Right now, we simply care about how many we'll get; we'll
3241 * set them up later while requesting irq's.
3242 */
3243 while (vectors >= vector_threshold) {
3244 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
3245 vectors);
3246 if (!err) /* Success in acquiring all requested vectors. */
3247 break;
3248 else if (err < 0)
3249 vectors = 0; /* Nasty failure, quit now */
3250 else /* err == number of vectors we should try again with */
3251 vectors = err;
3252 }
3253
3254 if (vectors < vector_threshold) {
3255 /* Can't allocate enough MSI-X interrupts? Oh well.
3256 * This just means we'll go with either a single MSI
3257 * vector or fall back to legacy interrupts.
3258 */
3259 DPRINTK(HW, DEBUG, "Unable to allocate MSI-X interrupts\n");
3260 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3261 kfree(adapter->msix_entries);
3262 adapter->msix_entries = NULL;
3263 } else {
3264 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
3265 /*
3266 * Adjust for only the vectors we'll use, which is minimum
3267 * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
3268 * vectors we were allocated.
3269 */
3270 adapter->num_msix_vectors = min(vectors,
3271 adapter->max_msix_q_vectors + NON_Q_VECTORS);
3272 }
3273 }
3274
3275 /**
3276 * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
3277 * @adapter: board private structure to initialize
3278 *
3279 * Cache the descriptor ring offsets for RSS to the assigned rings.
3280 *
3281 **/
3282 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
3283 {
3284 int i;
3285 bool ret = false;
3286
3287 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3288 for (i = 0; i < adapter->num_rx_queues; i++)
3289 adapter->rx_ring[i].reg_idx = i;
3290 for (i = 0; i < adapter->num_tx_queues; i++)
3291 adapter->tx_ring[i].reg_idx = i;
3292 ret = true;
3293 } else {
3294 ret = false;
3295 }
3296
3297 return ret;
3298 }
3299
3300 #ifdef CONFIG_IXGBE_DCB
3301 /**
3302 * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
3303 * @adapter: board private structure to initialize
3304 *
3305 * Cache the descriptor ring offsets for DCB to the assigned rings.
3306 *
3307 **/
3308 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
3309 {
3310 int i;
3311 bool ret = false;
3312 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
3313
3314 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3315 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
3316 /* the number of queues is assumed to be symmetric */
3317 for (i = 0; i < dcb_i; i++) {
3318 adapter->rx_ring[i].reg_idx = i << 3;
3319 adapter->tx_ring[i].reg_idx = i << 2;
3320 }
3321 ret = true;
3322 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
3323 if (dcb_i == 8) {
3324 /*
3325 * Tx TC0 starts at: descriptor queue 0
3326 * Tx TC1 starts at: descriptor queue 32
3327 * Tx TC2 starts at: descriptor queue 64
3328 * Tx TC3 starts at: descriptor queue 80
3329 * Tx TC4 starts at: descriptor queue 96
3330 * Tx TC5 starts at: descriptor queue 104
3331 * Tx TC6 starts at: descriptor queue 112
3332 * Tx TC7 starts at: descriptor queue 120
3333 *
3334 * Rx TC0-TC7 are offset by 16 queues each
3335 */
3336 for (i = 0; i < 3; i++) {
3337 adapter->tx_ring[i].reg_idx = i << 5;
3338 adapter->rx_ring[i].reg_idx = i << 4;
3339 }
3340 for ( ; i < 5; i++) {
3341 adapter->tx_ring[i].reg_idx =
3342 ((i + 2) << 4);
3343 adapter->rx_ring[i].reg_idx = i << 4;
3344 }
3345 for ( ; i < dcb_i; i++) {
3346 adapter->tx_ring[i].reg_idx =
3347 ((i + 8) << 3);
3348 adapter->rx_ring[i].reg_idx = i << 4;
3349 }
3350
3351 ret = true;
3352 } else if (dcb_i == 4) {
3353 /*
3354 * Tx TC0 starts at: descriptor queue 0
3355 * Tx TC1 starts at: descriptor queue 64
3356 * Tx TC2 starts at: descriptor queue 96
3357 * Tx TC3 starts at: descriptor queue 112
3358 *
3359 * Rx TC0-TC3 are offset by 32 queues each
3360 */
3361 adapter->tx_ring[0].reg_idx = 0;
3362 adapter->tx_ring[1].reg_idx = 64;
3363 adapter->tx_ring[2].reg_idx = 96;
3364 adapter->tx_ring[3].reg_idx = 112;
3365 for (i = 0 ; i < dcb_i; i++)
3366 adapter->rx_ring[i].reg_idx = i << 5;
3367
3368 ret = true;
3369 } else {
3370 ret = false;
3371 }
3372 } else {
3373 ret = false;
3374 }
3375 } else {
3376 ret = false;
3377 }
3378
3379 return ret;
3380 }
3381 #endif
3382
3383 /**
3384 * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
3385 * @adapter: board private structure to initialize
3386 *
3387 * Cache the descriptor ring offsets for Flow Director to the assigned rings.
3388 *
3389 **/
3390 static bool inline ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
3391 {
3392 int i;
3393 bool ret = false;
3394
3395 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3396 ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3397 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))) {
3398 for (i = 0; i < adapter->num_rx_queues; i++)
3399 adapter->rx_ring[i].reg_idx = i;
3400 for (i = 0; i < adapter->num_tx_queues; i++)
3401 adapter->tx_ring[i].reg_idx = i;
3402 ret = true;
3403 }
3404
3405 return ret;
3406 }
3407
3408 #ifdef IXGBE_FCOE
3409 /**
3410 * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
3411 * @adapter: board private structure to initialize
3412 *
3413 * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
3414 *
3415 */
3416 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
3417 {
3418 int i, fcoe_rx_i = 0, fcoe_tx_i = 0;
3419 bool ret = false;
3420 struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3421
3422 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3423 #ifdef CONFIG_IXGBE_DCB
3424 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3425 struct ixgbe_fcoe *fcoe = &adapter->fcoe;
3426
3427 ixgbe_cache_ring_dcb(adapter);
3428 /* find out queues in TC for FCoE */
3429 fcoe_rx_i = adapter->rx_ring[fcoe->tc].reg_idx + 1;
3430 fcoe_tx_i = adapter->tx_ring[fcoe->tc].reg_idx + 1;
3431 /*
3432 * In 82599, the number of Tx queues for each traffic
3433 * class for both 8-TC and 4-TC modes are:
3434 * TCs : TC0 TC1 TC2 TC3 TC4 TC5 TC6 TC7
3435 * 8 TCs: 32 32 16 16 8 8 8 8
3436 * 4 TCs: 64 64 32 32
3437 * We have max 8 queues for FCoE, where 8 the is
3438 * FCoE redirection table size. If TC for FCoE is
3439 * less than or equal to TC3, we have enough queues
3440 * to add max of 8 queues for FCoE, so we start FCoE
3441 * tx descriptor from the next one, i.e., reg_idx + 1.
3442 * If TC for FCoE is above TC3, implying 8 TC mode,
3443 * and we need 8 for FCoE, we have to take all queues
3444 * in that traffic class for FCoE.
3445 */
3446 if ((f->indices == IXGBE_FCRETA_SIZE) && (fcoe->tc > 3))
3447 fcoe_tx_i--;
3448 }
3449 #endif /* CONFIG_IXGBE_DCB */
3450 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3451 if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3452 (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3453 ixgbe_cache_ring_fdir(adapter);
3454 else
3455 ixgbe_cache_ring_rss(adapter);
3456
3457 fcoe_rx_i = f->mask;
3458 fcoe_tx_i = f->mask;
3459 }
3460 for (i = 0; i < f->indices; i++, fcoe_rx_i++, fcoe_tx_i++) {
3461 adapter->rx_ring[f->mask + i].reg_idx = fcoe_rx_i;
3462 adapter->tx_ring[f->mask + i].reg_idx = fcoe_tx_i;
3463 }
3464 ret = true;
3465 }
3466 return ret;
3467 }
3468
3469 #endif /* IXGBE_FCOE */
3470 /**
3471 * ixgbe_cache_ring_register - Descriptor ring to register mapping
3472 * @adapter: board private structure to initialize
3473 *
3474 * Once we know the feature-set enabled for the device, we'll cache
3475 * the register offset the descriptor ring is assigned to.
3476 *
3477 * Note, the order the various feature calls is important. It must start with
3478 * the "most" features enabled at the same time, then trickle down to the
3479 * least amount of features turned on at once.
3480 **/
3481 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
3482 {
3483 /* start with default case */
3484 adapter->rx_ring[0].reg_idx = 0;
3485 adapter->tx_ring[0].reg_idx = 0;
3486
3487 #ifdef IXGBE_FCOE
3488 if (ixgbe_cache_ring_fcoe(adapter))
3489 return;
3490
3491 #endif /* IXGBE_FCOE */
3492 #ifdef CONFIG_IXGBE_DCB
3493 if (ixgbe_cache_ring_dcb(adapter))
3494 return;
3495
3496 #endif
3497 if (ixgbe_cache_ring_fdir(adapter))
3498 return;
3499
3500 if (ixgbe_cache_ring_rss(adapter))
3501 return;
3502 }
3503
3504 /**
3505 * ixgbe_alloc_queues - Allocate memory for all rings
3506 * @adapter: board private structure to initialize
3507 *
3508 * We allocate one ring per queue at run-time since we don't know the
3509 * number of queues at compile-time. The polling_netdev array is
3510 * intended for Multiqueue, but should work fine with a single queue.
3511 **/
3512 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
3513 {
3514 int i;
3515
3516 adapter->tx_ring = kcalloc(adapter->num_tx_queues,
3517 sizeof(struct ixgbe_ring), GFP_KERNEL);
3518 if (!adapter->tx_ring)
3519 goto err_tx_ring_allocation;
3520
3521 adapter->rx_ring = kcalloc(adapter->num_rx_queues,
3522 sizeof(struct ixgbe_ring), GFP_KERNEL);
3523 if (!adapter->rx_ring)
3524 goto err_rx_ring_allocation;
3525
3526 for (i = 0; i < adapter->num_tx_queues; i++) {
3527 adapter->tx_ring[i].count = adapter->tx_ring_count;
3528 adapter->tx_ring[i].queue_index = i;
3529 }
3530
3531 for (i = 0; i < adapter->num_rx_queues; i++) {
3532 adapter->rx_ring[i].count = adapter->rx_ring_count;
3533 adapter->rx_ring[i].queue_index = i;
3534 }
3535
3536 ixgbe_cache_ring_register(adapter);
3537
3538 return 0;
3539
3540 err_rx_ring_allocation:
3541 kfree(adapter->tx_ring);
3542 err_tx_ring_allocation:
3543 return -ENOMEM;
3544 }
3545
3546 /**
3547 * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
3548 * @adapter: board private structure to initialize
3549 *
3550 * Attempt to configure the interrupts using the best available
3551 * capabilities of the hardware and the kernel.
3552 **/
3553 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
3554 {
3555 struct ixgbe_hw *hw = &adapter->hw;
3556 int err = 0;
3557 int vector, v_budget;
3558
3559 /*
3560 * It's easy to be greedy for MSI-X vectors, but it really
3561 * doesn't do us much good if we have a lot more vectors
3562 * than CPU's. So let's be conservative and only ask for
3563 * (roughly) twice the number of vectors as there are CPU's.
3564 */
3565 v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
3566 (int)(num_online_cpus() * 2)) + NON_Q_VECTORS;
3567
3568 /*
3569 * At the same time, hardware can only support a maximum of
3570 * hw.mac->max_msix_vectors vectors. With features
3571 * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
3572 * descriptor queues supported by our device. Thus, we cap it off in
3573 * those rare cases where the cpu count also exceeds our vector limit.
3574 */
3575 v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
3576
3577 /* A failure in MSI-X entry allocation isn't fatal, but it does
3578 * mean we disable MSI-X capabilities of the adapter. */
3579 adapter->msix_entries = kcalloc(v_budget,
3580 sizeof(struct msix_entry), GFP_KERNEL);
3581 if (adapter->msix_entries) {
3582 for (vector = 0; vector < v_budget; vector++)
3583 adapter->msix_entries[vector].entry = vector;
3584
3585 ixgbe_acquire_msix_vectors(adapter, v_budget);
3586
3587 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3588 goto out;
3589 }
3590
3591 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
3592 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
3593 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3594 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3595 adapter->atr_sample_rate = 0;
3596 ixgbe_set_num_queues(adapter);
3597
3598 err = pci_enable_msi(adapter->pdev);
3599 if (!err) {
3600 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
3601 } else {
3602 DPRINTK(HW, DEBUG, "Unable to allocate MSI interrupt, "
3603 "falling back to legacy. Error: %d\n", err);
3604 /* reset err */
3605 err = 0;
3606 }
3607
3608 out:
3609 return err;
3610 }
3611
3612 /**
3613 * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
3614 * @adapter: board private structure to initialize
3615 *
3616 * We allocate one q_vector per queue interrupt. If allocation fails we
3617 * return -ENOMEM.
3618 **/
3619 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
3620 {
3621 int q_idx, num_q_vectors;
3622 struct ixgbe_q_vector *q_vector;
3623 int napi_vectors;
3624 int (*poll)(struct napi_struct *, int);
3625
3626 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3627 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3628 napi_vectors = adapter->num_rx_queues;
3629 poll = &ixgbe_clean_rxtx_many;
3630 } else {
3631 num_q_vectors = 1;
3632 napi_vectors = 1;
3633 poll = &ixgbe_poll;
3634 }
3635
3636 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3637 q_vector = kzalloc(sizeof(struct ixgbe_q_vector), GFP_KERNEL);
3638 if (!q_vector)
3639 goto err_out;
3640 q_vector->adapter = adapter;
3641 if (q_vector->txr_count && !q_vector->rxr_count)
3642 q_vector->eitr = adapter->tx_eitr_param;
3643 else
3644 q_vector->eitr = adapter->rx_eitr_param;
3645 q_vector->v_idx = q_idx;
3646 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
3647 adapter->q_vector[q_idx] = q_vector;
3648 }
3649
3650 return 0;
3651
3652 err_out:
3653 while (q_idx) {
3654 q_idx--;
3655 q_vector = adapter->q_vector[q_idx];
3656 netif_napi_del(&q_vector->napi);
3657 kfree(q_vector);
3658 adapter->q_vector[q_idx] = NULL;
3659 }
3660 return -ENOMEM;
3661 }
3662
3663 /**
3664 * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
3665 * @adapter: board private structure to initialize
3666 *
3667 * This function frees the memory allocated to the q_vectors. In addition if
3668 * NAPI is enabled it will delete any references to the NAPI struct prior
3669 * to freeing the q_vector.
3670 **/
3671 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
3672 {
3673 int q_idx, num_q_vectors;
3674
3675 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3676 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3677 else
3678 num_q_vectors = 1;
3679
3680 for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
3681 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
3682 adapter->q_vector[q_idx] = NULL;
3683 netif_napi_del(&q_vector->napi);
3684 kfree(q_vector);
3685 }
3686 }
3687
3688 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
3689 {
3690 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3691 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
3692 pci_disable_msix(adapter->pdev);
3693 kfree(adapter->msix_entries);
3694 adapter->msix_entries = NULL;
3695 } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
3696 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
3697 pci_disable_msi(adapter->pdev);
3698 }
3699 return;
3700 }
3701
3702 /**
3703 * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
3704 * @adapter: board private structure to initialize
3705 *
3706 * We determine which interrupt scheme to use based on...
3707 * - Kernel support (MSI, MSI-X)
3708 * - which can be user-defined (via MODULE_PARAM)
3709 * - Hardware queue count (num_*_queues)
3710 * - defined by miscellaneous hardware support/features (RSS, etc.)
3711 **/
3712 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
3713 {
3714 int err;
3715
3716 /* Number of supported queues */
3717 ixgbe_set_num_queues(adapter);
3718
3719 err = ixgbe_set_interrupt_capability(adapter);
3720 if (err) {
3721 DPRINTK(PROBE, ERR, "Unable to setup interrupt capabilities\n");
3722 goto err_set_interrupt;
3723 }
3724
3725 err = ixgbe_alloc_q_vectors(adapter);
3726 if (err) {
3727 DPRINTK(PROBE, ERR, "Unable to allocate memory for queue "
3728 "vectors\n");
3729 goto err_alloc_q_vectors;
3730 }
3731
3732 err = ixgbe_alloc_queues(adapter);
3733 if (err) {
3734 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
3735 goto err_alloc_queues;
3736 }
3737
3738 DPRINTK(DRV, INFO, "Multiqueue %s: Rx Queue count = %u, "
3739 "Tx Queue count = %u\n",
3740 (adapter->num_rx_queues > 1) ? "Enabled" :
3741 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
3742
3743 set_bit(__IXGBE_DOWN, &adapter->state);
3744
3745 return 0;
3746
3747 err_alloc_queues:
3748 ixgbe_free_q_vectors(adapter);
3749 err_alloc_q_vectors:
3750 ixgbe_reset_interrupt_capability(adapter);
3751 err_set_interrupt:
3752 return err;
3753 }
3754
3755 /**
3756 * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
3757 * @adapter: board private structure to clear interrupt scheme on
3758 *
3759 * We go through and clear interrupt specific resources and reset the structure
3760 * to pre-load conditions
3761 **/
3762 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
3763 {
3764 kfree(adapter->tx_ring);
3765 kfree(adapter->rx_ring);
3766 adapter->tx_ring = NULL;
3767 adapter->rx_ring = NULL;
3768
3769 ixgbe_free_q_vectors(adapter);
3770 ixgbe_reset_interrupt_capability(adapter);
3771 }
3772
3773 /**
3774 * ixgbe_sfp_timer - worker thread to find a missing module
3775 * @data: pointer to our adapter struct
3776 **/
3777 static void ixgbe_sfp_timer(unsigned long data)
3778 {
3779 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
3780
3781 /*
3782 * Do the sfp_timer outside of interrupt context due to the
3783 * delays that sfp+ detection requires
3784 */
3785 schedule_work(&adapter->sfp_task);
3786 }
3787
3788 /**
3789 * ixgbe_sfp_task - worker thread to find a missing module
3790 * @work: pointer to work_struct containing our data
3791 **/
3792 static void ixgbe_sfp_task(struct work_struct *work)
3793 {
3794 struct ixgbe_adapter *adapter = container_of(work,
3795 struct ixgbe_adapter,
3796 sfp_task);
3797 struct ixgbe_hw *hw = &adapter->hw;
3798
3799 if ((hw->phy.type == ixgbe_phy_nl) &&
3800 (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
3801 s32 ret = hw->phy.ops.identify_sfp(hw);
3802 if (ret == IXGBE_ERR_SFP_NOT_PRESENT)
3803 goto reschedule;
3804 ret = hw->phy.ops.reset(hw);
3805 if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
3806 dev_err(&adapter->pdev->dev, "failed to initialize "
3807 "because an unsupported SFP+ module type "
3808 "was detected.\n"
3809 "Reload the driver after installing a "
3810 "supported module.\n");
3811 unregister_netdev(adapter->netdev);
3812 } else {
3813 DPRINTK(PROBE, INFO, "detected SFP+: %d\n",
3814 hw->phy.sfp_type);
3815 }
3816 /* don't need this routine any more */
3817 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3818 }
3819 return;
3820 reschedule:
3821 if (test_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state))
3822 mod_timer(&adapter->sfp_timer,
3823 round_jiffies(jiffies + (2 * HZ)));
3824 }
3825
3826 /**
3827 * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
3828 * @adapter: board private structure to initialize
3829 *
3830 * ixgbe_sw_init initializes the Adapter private data structure.
3831 * Fields are initialized based on PCI device information and
3832 * OS network device settings (MTU size).
3833 **/
3834 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
3835 {
3836 struct ixgbe_hw *hw = &adapter->hw;
3837 struct pci_dev *pdev = adapter->pdev;
3838 unsigned int rss;
3839 #ifdef CONFIG_IXGBE_DCB
3840 int j;
3841 struct tc_configuration *tc;
3842 #endif
3843
3844 /* PCI config space info */
3845
3846 hw->vendor_id = pdev->vendor;
3847 hw->device_id = pdev->device;
3848 hw->revision_id = pdev->revision;
3849 hw->subsystem_vendor_id = pdev->subsystem_vendor;
3850 hw->subsystem_device_id = pdev->subsystem_device;
3851
3852 /* Set capability flags */
3853 rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
3854 adapter->ring_feature[RING_F_RSS].indices = rss;
3855 adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
3856 adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
3857 if (hw->mac.type == ixgbe_mac_82598EB) {
3858 if (hw->device_id == IXGBE_DEV_ID_82598AT)
3859 adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
3860 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
3861 } else if (hw->mac.type == ixgbe_mac_82599EB) {
3862 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
3863 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
3864 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
3865 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
3866 adapter->ring_feature[RING_F_FDIR].indices =
3867 IXGBE_MAX_FDIR_INDICES;
3868 adapter->atr_sample_rate = 20;
3869 adapter->fdir_pballoc = 0;
3870 #ifdef IXGBE_FCOE
3871 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
3872 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
3873 adapter->ring_feature[RING_F_FCOE].indices = 0;
3874 /* Default traffic class to use for FCoE */
3875 adapter->fcoe.tc = IXGBE_FCOE_DEFTC;
3876 #endif /* IXGBE_FCOE */
3877 }
3878
3879 #ifdef CONFIG_IXGBE_DCB
3880 /* Configure DCB traffic classes */
3881 for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
3882 tc = &adapter->dcb_cfg.tc_config[j];
3883 tc->path[DCB_TX_CONFIG].bwg_id = 0;
3884 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
3885 tc->path[DCB_RX_CONFIG].bwg_id = 0;
3886 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
3887 tc->dcb_pfc = pfc_disabled;
3888 }
3889 adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
3890 adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
3891 adapter->dcb_cfg.rx_pba_cfg = pba_equal;
3892 adapter->dcb_cfg.pfc_mode_enable = false;
3893 adapter->dcb_cfg.round_robin_enable = false;
3894 adapter->dcb_set_bitmap = 0x00;
3895 ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
3896 adapter->ring_feature[RING_F_DCB].indices);
3897
3898 #endif
3899
3900 /* default flow control settings */
3901 hw->fc.requested_mode = ixgbe_fc_full;
3902 hw->fc.current_mode = ixgbe_fc_full; /* init for ethtool output */
3903 #ifdef CONFIG_DCB
3904 adapter->last_lfc_mode = hw->fc.current_mode;
3905 #endif
3906 hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
3907 hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
3908 hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
3909 hw->fc.send_xon = true;
3910 hw->fc.disable_fc_autoneg = false;
3911
3912 /* enable itr by default in dynamic mode */
3913 adapter->rx_itr_setting = 1;
3914 adapter->rx_eitr_param = 20000;
3915 adapter->tx_itr_setting = 1;
3916 adapter->tx_eitr_param = 10000;
3917
3918 /* set defaults for eitr in MegaBytes */
3919 adapter->eitr_low = 10;
3920 adapter->eitr_high = 20;
3921
3922 /* set default ring sizes */
3923 adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
3924 adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
3925
3926 /* initialize eeprom parameters */
3927 if (ixgbe_init_eeprom_params_generic(hw)) {
3928 dev_err(&pdev->dev, "EEPROM initialization failed\n");
3929 return -EIO;
3930 }
3931
3932 /* enable rx csum by default */
3933 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
3934
3935 set_bit(__IXGBE_DOWN, &adapter->state);
3936
3937 return 0;
3938 }
3939
3940 /**
3941 * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
3942 * @adapter: board private structure
3943 * @tx_ring: tx descriptor ring (for a specific queue) to setup
3944 *
3945 * Return 0 on success, negative on failure
3946 **/
3947 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
3948 struct ixgbe_ring *tx_ring)
3949 {
3950 struct pci_dev *pdev = adapter->pdev;
3951 int size;
3952
3953 size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
3954 tx_ring->tx_buffer_info = vmalloc(size);
3955 if (!tx_ring->tx_buffer_info)
3956 goto err;
3957 memset(tx_ring->tx_buffer_info, 0, size);
3958
3959 /* round up to nearest 4K */
3960 tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
3961 tx_ring->size = ALIGN(tx_ring->size, 4096);
3962
3963 tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
3964 &tx_ring->dma);
3965 if (!tx_ring->desc)
3966 goto err;
3967
3968 tx_ring->next_to_use = 0;
3969 tx_ring->next_to_clean = 0;
3970 tx_ring->work_limit = tx_ring->count;
3971 return 0;
3972
3973 err:
3974 vfree(tx_ring->tx_buffer_info);
3975 tx_ring->tx_buffer_info = NULL;
3976 DPRINTK(PROBE, ERR, "Unable to allocate memory for the transmit "
3977 "descriptor ring\n");
3978 return -ENOMEM;
3979 }
3980
3981 /**
3982 * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
3983 * @adapter: board private structure
3984 *
3985 * If this function returns with an error, then it's possible one or
3986 * more of the rings is populated (while the rest are not). It is the
3987 * callers duty to clean those orphaned rings.
3988 *
3989 * Return 0 on success, negative on failure
3990 **/
3991 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
3992 {
3993 int i, err = 0;
3994
3995 for (i = 0; i < adapter->num_tx_queues; i++) {
3996 err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]);
3997 if (!err)
3998 continue;
3999 DPRINTK(PROBE, ERR, "Allocation for Tx Queue %u failed\n", i);
4000 break;
4001 }
4002
4003 return err;
4004 }
4005
4006 /**
4007 * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
4008 * @adapter: board private structure
4009 * @rx_ring: rx descriptor ring (for a specific queue) to setup
4010 *
4011 * Returns 0 on success, negative on failure
4012 **/
4013 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
4014 struct ixgbe_ring *rx_ring)
4015 {
4016 struct pci_dev *pdev = adapter->pdev;
4017 int size;
4018
4019 size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4020 rx_ring->rx_buffer_info = vmalloc(size);
4021 if (!rx_ring->rx_buffer_info) {
4022 DPRINTK(PROBE, ERR,
4023 "vmalloc allocation failed for the rx desc ring\n");
4024 goto alloc_failed;
4025 }
4026 memset(rx_ring->rx_buffer_info, 0, size);
4027
4028 /* Round up to nearest 4K */
4029 rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
4030 rx_ring->size = ALIGN(rx_ring->size, 4096);
4031
4032 rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size, &rx_ring->dma);
4033
4034 if (!rx_ring->desc) {
4035 DPRINTK(PROBE, ERR,
4036 "Memory allocation failed for the rx desc ring\n");
4037 vfree(rx_ring->rx_buffer_info);
4038 goto alloc_failed;
4039 }
4040
4041 rx_ring->next_to_clean = 0;
4042 rx_ring->next_to_use = 0;
4043
4044 return 0;
4045
4046 alloc_failed:
4047 return -ENOMEM;
4048 }
4049
4050 /**
4051 * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
4052 * @adapter: board private structure
4053 *
4054 * If this function returns with an error, then it's possible one or
4055 * more of the rings is populated (while the rest are not). It is the
4056 * callers duty to clean those orphaned rings.
4057 *
4058 * Return 0 on success, negative on failure
4059 **/
4060
4061 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
4062 {
4063 int i, err = 0;
4064
4065 for (i = 0; i < adapter->num_rx_queues; i++) {
4066 err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]);
4067 if (!err)
4068 continue;
4069 DPRINTK(PROBE, ERR, "Allocation for Rx Queue %u failed\n", i);
4070 break;
4071 }
4072
4073 return err;
4074 }
4075
4076 /**
4077 * ixgbe_free_tx_resources - Free Tx Resources per Queue
4078 * @adapter: board private structure
4079 * @tx_ring: Tx descriptor ring for a specific queue
4080 *
4081 * Free all transmit software resources
4082 **/
4083 void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
4084 struct ixgbe_ring *tx_ring)
4085 {
4086 struct pci_dev *pdev = adapter->pdev;
4087
4088 ixgbe_clean_tx_ring(adapter, tx_ring);
4089
4090 vfree(tx_ring->tx_buffer_info);
4091 tx_ring->tx_buffer_info = NULL;
4092
4093 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
4094
4095 tx_ring->desc = NULL;
4096 }
4097
4098 /**
4099 * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
4100 * @adapter: board private structure
4101 *
4102 * Free all transmit software resources
4103 **/
4104 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
4105 {
4106 int i;
4107
4108 for (i = 0; i < adapter->num_tx_queues; i++)
4109 if (adapter->tx_ring[i].desc)
4110 ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
4111 }
4112
4113 /**
4114 * ixgbe_free_rx_resources - Free Rx Resources
4115 * @adapter: board private structure
4116 * @rx_ring: ring to clean the resources from
4117 *
4118 * Free all receive software resources
4119 **/
4120 void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
4121 struct ixgbe_ring *rx_ring)
4122 {
4123 struct pci_dev *pdev = adapter->pdev;
4124
4125 ixgbe_clean_rx_ring(adapter, rx_ring);
4126
4127 vfree(rx_ring->rx_buffer_info);
4128 rx_ring->rx_buffer_info = NULL;
4129
4130 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
4131
4132 rx_ring->desc = NULL;
4133 }
4134
4135 /**
4136 * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
4137 * @adapter: board private structure
4138 *
4139 * Free all receive software resources
4140 **/
4141 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
4142 {
4143 int i;
4144
4145 for (i = 0; i < adapter->num_rx_queues; i++)
4146 if (adapter->rx_ring[i].desc)
4147 ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
4148 }
4149
4150 /**
4151 * ixgbe_change_mtu - Change the Maximum Transfer Unit
4152 * @netdev: network interface device structure
4153 * @new_mtu: new value for maximum frame size
4154 *
4155 * Returns 0 on success, negative on failure
4156 **/
4157 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
4158 {
4159 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4160 int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4161
4162 /* MTU < 68 is an error and causes problems on some kernels */
4163 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
4164 return -EINVAL;
4165
4166 DPRINTK(PROBE, INFO, "changing MTU from %d to %d\n",
4167 netdev->mtu, new_mtu);
4168 /* must set new MTU before calling down or up */
4169 netdev->mtu = new_mtu;
4170
4171 if (netif_running(netdev))
4172 ixgbe_reinit_locked(adapter);
4173
4174 return 0;
4175 }
4176
4177 /**
4178 * ixgbe_open - Called when a network interface is made active
4179 * @netdev: network interface device structure
4180 *
4181 * Returns 0 on success, negative value on failure
4182 *
4183 * The open entry point is called when a network interface is made
4184 * active by the system (IFF_UP). At this point all resources needed
4185 * for transmit and receive operations are allocated, the interrupt
4186 * handler is registered with the OS, the watchdog timer is started,
4187 * and the stack is notified that the interface is ready.
4188 **/
4189 static int ixgbe_open(struct net_device *netdev)
4190 {
4191 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4192 int err;
4193
4194 /* disallow open during test */
4195 if (test_bit(__IXGBE_TESTING, &adapter->state))
4196 return -EBUSY;
4197
4198 netif_carrier_off(netdev);
4199
4200 /* allocate transmit descriptors */
4201 err = ixgbe_setup_all_tx_resources(adapter);
4202 if (err)
4203 goto err_setup_tx;
4204
4205 /* allocate receive descriptors */
4206 err = ixgbe_setup_all_rx_resources(adapter);
4207 if (err)
4208 goto err_setup_rx;
4209
4210 ixgbe_configure(adapter);
4211
4212 err = ixgbe_request_irq(adapter);
4213 if (err)
4214 goto err_req_irq;
4215
4216 err = ixgbe_up_complete(adapter);
4217 if (err)
4218 goto err_up;
4219
4220 netif_tx_start_all_queues(netdev);
4221
4222 return 0;
4223
4224 err_up:
4225 ixgbe_release_hw_control(adapter);
4226 ixgbe_free_irq(adapter);
4227 err_req_irq:
4228 err_setup_rx:
4229 ixgbe_free_all_rx_resources(adapter);
4230 err_setup_tx:
4231 ixgbe_free_all_tx_resources(adapter);
4232 ixgbe_reset(adapter);
4233
4234 return err;
4235 }
4236
4237 /**
4238 * ixgbe_close - Disables a network interface
4239 * @netdev: network interface device structure
4240 *
4241 * Returns 0, this is not allowed to fail
4242 *
4243 * The close entry point is called when an interface is de-activated
4244 * by the OS. The hardware is still under the drivers control, but
4245 * needs to be disabled. A global MAC reset is issued to stop the
4246 * hardware, and all transmit and receive resources are freed.
4247 **/
4248 static int ixgbe_close(struct net_device *netdev)
4249 {
4250 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4251
4252 ixgbe_down(adapter);
4253 ixgbe_free_irq(adapter);
4254
4255 ixgbe_free_all_tx_resources(adapter);
4256 ixgbe_free_all_rx_resources(adapter);
4257
4258 ixgbe_release_hw_control(adapter);
4259
4260 return 0;
4261 }
4262
4263 #ifdef CONFIG_PM
4264 static int ixgbe_resume(struct pci_dev *pdev)
4265 {
4266 struct net_device *netdev = pci_get_drvdata(pdev);
4267 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4268 u32 err;
4269
4270 pci_set_power_state(pdev, PCI_D0);
4271 pci_restore_state(pdev);
4272
4273 err = pci_enable_device_mem(pdev);
4274 if (err) {
4275 printk(KERN_ERR "ixgbe: Cannot enable PCI device from "
4276 "suspend\n");
4277 return err;
4278 }
4279 pci_set_master(pdev);
4280
4281 pci_wake_from_d3(pdev, false);
4282
4283 err = ixgbe_init_interrupt_scheme(adapter);
4284 if (err) {
4285 printk(KERN_ERR "ixgbe: Cannot initialize interrupts for "
4286 "device\n");
4287 return err;
4288 }
4289
4290 ixgbe_reset(adapter);
4291
4292 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
4293
4294 if (netif_running(netdev)) {
4295 err = ixgbe_open(adapter->netdev);
4296 if (err)
4297 return err;
4298 }
4299
4300 netif_device_attach(netdev);
4301
4302 return 0;
4303 }
4304 #endif /* CONFIG_PM */
4305
4306 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
4307 {
4308 struct net_device *netdev = pci_get_drvdata(pdev);
4309 struct ixgbe_adapter *adapter = netdev_priv(netdev);
4310 struct ixgbe_hw *hw = &adapter->hw;
4311 u32 ctrl, fctrl;
4312 u32 wufc = adapter->wol;
4313 #ifdef CONFIG_PM
4314 int retval = 0;
4315 #endif
4316
4317 netif_device_detach(netdev);
4318
4319 if (netif_running(netdev)) {
4320 ixgbe_down(adapter);
4321 ixgbe_free_irq(adapter);
4322 ixgbe_free_all_tx_resources(adapter);
4323 ixgbe_free_all_rx_resources(adapter);
4324 }
4325 ixgbe_clear_interrupt_scheme(adapter);
4326
4327 #ifdef CONFIG_PM
4328 retval = pci_save_state(pdev);
4329 if (retval)
4330 return retval;
4331
4332 #endif
4333 if (wufc) {
4334 ixgbe_set_rx_mode(netdev);
4335
4336 /* turn on all-multi mode if wake on multicast is enabled */
4337 if (wufc & IXGBE_WUFC_MC) {
4338 fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4339 fctrl |= IXGBE_FCTRL_MPE;
4340 IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
4341 }
4342
4343 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
4344 ctrl |= IXGBE_CTRL_GIO_DIS;
4345 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
4346
4347 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
4348 } else {
4349 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
4350 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
4351 }
4352
4353 if (wufc && hw->mac.type == ixgbe_mac_82599EB)
4354 pci_wake_from_d3(pdev, true);
4355 else
4356 pci_wake_from_d3(pdev, false);
4357
4358 *enable_wake = !!wufc;
4359
4360 ixgbe_release_hw_control(adapter);
4361
4362 pci_disable_device(pdev);
4363
4364 return 0;
4365 }
4366
4367 #ifdef CONFIG_PM
4368 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
4369 {
4370 int retval;
4371 bool wake;
4372
4373 retval = __ixgbe_shutdown(pdev, &wake);
4374 if (retval)
4375 return retval;
4376
4377 if (wake) {
4378 pci_prepare_to_sleep(pdev);
4379 } else {
4380 pci_wake_from_d3(pdev, false);
4381 pci_set_power_state(pdev, PCI_D3hot);
4382 }
4383
4384 return 0;
4385 }
4386 #endif /* CONFIG_PM */
4387
4388 static void ixgbe_shutdown(struct pci_dev *pdev)
4389 {
4390 bool wake;
4391
4392 __ixgbe_shutdown(pdev, &wake);
4393
4394 if (system_state == SYSTEM_POWER_OFF) {
4395 pci_wake_from_d3(pdev, wake);
4396 pci_set_power_state(pdev, PCI_D3hot);
4397 }
4398 }
4399
4400 /**
4401 * ixgbe_update_stats - Update the board statistics counters.
4402 * @adapter: board private structure
4403 **/
4404 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
4405 {
4406 struct ixgbe_hw *hw = &adapter->hw;
4407 u64 total_mpc = 0;
4408 u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
4409
4410 if (hw->mac.type == ixgbe_mac_82599EB) {
4411 u64 rsc_count = 0;
4412 for (i = 0; i < 16; i++)
4413 adapter->hw_rx_no_dma_resources +=
4414 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4415 for (i = 0; i < adapter->num_rx_queues; i++)
4416 rsc_count += adapter->rx_ring[i].rsc_count;
4417 adapter->rsc_count = rsc_count;
4418 }
4419
4420 adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
4421 for (i = 0; i < 8; i++) {
4422 /* for packet buffers not used, the register should read 0 */
4423 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
4424 missed_rx += mpc;
4425 adapter->stats.mpc[i] += mpc;
4426 total_mpc += adapter->stats.mpc[i];
4427 if (hw->mac.type == ixgbe_mac_82598EB)
4428 adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
4429 adapter->stats.qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
4430 adapter->stats.qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
4431 adapter->stats.qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
4432 adapter->stats.qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
4433 if (hw->mac.type == ixgbe_mac_82599EB) {
4434 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4435 IXGBE_PXONRXCNT(i));
4436 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4437 IXGBE_PXOFFRXCNT(i));
4438 adapter->stats.qprdc[i] += IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
4439 } else {
4440 adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
4441 IXGBE_PXONRXC(i));
4442 adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
4443 IXGBE_PXOFFRXC(i));
4444 }
4445 adapter->stats.pxontxc[i] += IXGBE_READ_REG(hw,
4446 IXGBE_PXONTXC(i));
4447 adapter->stats.pxofftxc[i] += IXGBE_READ_REG(hw,
4448 IXGBE_PXOFFTXC(i));
4449 }
4450 adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
4451 /* work around hardware counting issue */
4452 adapter->stats.gprc -= missed_rx;
4453
4454 /* 82598 hardware only has a 32 bit counter in the high register */
4455 if (hw->mac.type == ixgbe_mac_82599EB) {
4456 u64 tmp;
4457 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
4458 tmp = IXGBE_READ_REG(hw, IXGBE_GORCH) & 0xF; /* 4 high bits of GORC */
4459 adapter->stats.gorc += (tmp << 32);
4460 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
4461 tmp = IXGBE_READ_REG(hw, IXGBE_GOTCH) & 0xF; /* 4 high bits of GOTC */
4462 adapter->stats.gotc += (tmp << 32);
4463 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORL);
4464 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
4465 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
4466 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
4467 adapter->stats.fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
4468 adapter->stats.fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
4469 #ifdef IXGBE_FCOE
4470 adapter->stats.fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
4471 adapter->stats.fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
4472 adapter->stats.fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
4473 adapter->stats.fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
4474 adapter->stats.fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
4475 adapter->stats.fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
4476 #endif /* IXGBE_FCOE */
4477 } else {
4478 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
4479 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
4480 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
4481 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
4482 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
4483 }
4484 bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
4485 adapter->stats.bprc += bprc;
4486 adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
4487 if (hw->mac.type == ixgbe_mac_82598EB)
4488 adapter->stats.mprc -= bprc;
4489 adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
4490 adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
4491 adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
4492 adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
4493 adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
4494 adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
4495 adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
4496 adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
4497 lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
4498 adapter->stats.lxontxc += lxon;
4499 lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
4500 adapter->stats.lxofftxc += lxoff;
4501 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4502 adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
4503 adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
4504 /*
4505 * 82598 errata - tx of flow control packets is included in tx counters
4506 */
4507 xon_off_tot = lxon + lxoff;
4508 adapter->stats.gptc -= xon_off_tot;
4509 adapter->stats.mptc -= xon_off_tot;
4510 adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
4511 adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
4512 adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
4513 adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
4514 adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
4515 adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
4516 adapter->stats.ptc64 -= xon_off_tot;
4517 adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
4518 adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
4519 adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
4520 adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
4521 adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
4522 adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
4523
4524 /* Fill out the OS statistics structure */
4525 adapter->net_stats.multicast = adapter->stats.mprc;
4526
4527 /* Rx Errors */
4528 adapter->net_stats.rx_errors = adapter->stats.crcerrs +
4529 adapter->stats.rlec;
4530 adapter->net_stats.rx_dropped = 0;
4531 adapter->net_stats.rx_length_errors = adapter->stats.rlec;
4532 adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
4533 adapter->net_stats.rx_missed_errors = total_mpc;
4534 }
4535
4536 /**
4537 * ixgbe_watchdog - Timer Call-back
4538 * @data: pointer to adapter cast into an unsigned long
4539 **/
4540 static void ixgbe_watchdog(unsigned long data)
4541 {
4542 struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4543 struct ixgbe_hw *hw = &adapter->hw;
4544 u64 eics = 0;
4545 int i;
4546
4547 /*
4548 * Do the watchdog outside of interrupt context due to the lovely
4549 * delays that some of the newer hardware requires
4550 */
4551
4552 if (test_bit(__IXGBE_DOWN, &adapter->state))
4553 goto watchdog_short_circuit;
4554
4555 if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
4556 /*
4557 * for legacy and MSI interrupts don't set any bits
4558 * that are enabled for EIAM, because this operation
4559 * would set *both* EIMS and EICS for any bit in EIAM
4560 */
4561 IXGBE_WRITE_REG(hw, IXGBE_EICS,
4562 (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
4563 goto watchdog_reschedule;
4564 }
4565
4566 /* get one bit for every active tx/rx interrupt vector */
4567 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
4568 struct ixgbe_q_vector *qv = adapter->q_vector[i];
4569 if (qv->rxr_count || qv->txr_count)
4570 eics |= ((u64)1 << i);
4571 }
4572
4573 /* Cause software interrupt to ensure rx rings are cleaned */
4574 ixgbe_irq_rearm_queues(adapter, eics);
4575
4576 watchdog_reschedule:
4577 /* Reset the timer */
4578 mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
4579
4580 watchdog_short_circuit:
4581 schedule_work(&adapter->watchdog_task);
4582 }
4583
4584 /**
4585 * ixgbe_multispeed_fiber_task - worker thread to configure multispeed fiber
4586 * @work: pointer to work_struct containing our data
4587 **/
4588 static void ixgbe_multispeed_fiber_task(struct work_struct *work)
4589 {
4590 struct ixgbe_adapter *adapter = container_of(work,
4591 struct ixgbe_adapter,
4592 multispeed_fiber_task);
4593 struct ixgbe_hw *hw = &adapter->hw;
4594 u32 autoneg;
4595 bool negotiation;
4596
4597 adapter->flags |= IXGBE_FLAG_IN_SFP_LINK_TASK;
4598 autoneg = hw->phy.autoneg_advertised;
4599 if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
4600 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
4601 if (hw->mac.ops.setup_link)
4602 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
4603 adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
4604 adapter->flags &= ~IXGBE_FLAG_IN_SFP_LINK_TASK;
4605 }
4606
4607 /**
4608 * ixgbe_sfp_config_module_task - worker thread to configure a new SFP+ module
4609 * @work: pointer to work_struct containing our data
4610 **/
4611 static void ixgbe_sfp_config_module_task(struct work_struct *work)
4612 {
4613 struct ixgbe_adapter *adapter = container_of(work,
4614 struct ixgbe_adapter,
4615 sfp_config_module_task);
4616 struct ixgbe_hw *hw = &adapter->hw;
4617 u32 err;
4618
4619 adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
4620
4621 /* Time for electrical oscillations to settle down */
4622 msleep(100);
4623 err = hw->phy.ops.identify_sfp(hw);
4624
4625 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
4626 dev_err(&adapter->pdev->dev, "failed to initialize because "
4627 "an unsupported SFP+ module type was detected.\n"
4628 "Reload the driver after installing a supported "
4629 "module.\n");
4630 unregister_netdev(adapter->netdev);
4631 return;
4632 }
4633 hw->mac.ops.setup_sfp(hw);
4634
4635 if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
4636 /* This will also work for DA Twinax connections */
4637 schedule_work(&adapter->multispeed_fiber_task);
4638 adapter->flags &= ~IXGBE_FLAG_IN_SFP_MOD_TASK;
4639 }
4640
4641 /**
4642 * ixgbe_fdir_reinit_task - worker thread to reinit FDIR filter table
4643 * @work: pointer to work_struct containing our data
4644 **/
4645 static void ixgbe_fdir_reinit_task(struct work_struct *work)
4646 {
4647 struct ixgbe_adapter *adapter = container_of(work,
4648 struct ixgbe_adapter,
4649 fdir_reinit_task);
4650 struct ixgbe_hw *hw = &adapter->hw;
4651 int i;
4652
4653 if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
4654 for (i = 0; i < adapter->num_tx_queues; i++)
4655 set_bit(__IXGBE_FDIR_INIT_DONE,
4656 &(adapter->tx_ring[i].reinit_state));
4657 } else {
4658 DPRINTK(PROBE, ERR, "failed to finish FDIR re-initialization, "
4659 "ignored adding FDIR ATR filters \n");
4660 }
4661 /* Done FDIR Re-initialization, enable transmits */
4662 netif_tx_start_all_queues(adapter->netdev);
4663 }
4664
4665 /**
4666 * ixgbe_watchdog_task - worker thread to bring link up
4667 * @work: pointer to work_struct containing our data
4668 **/
4669 static void ixgbe_watchdog_task(struct work_struct *work)
4670 {
4671 struct ixgbe_adapter *adapter = container_of(work,
4672 struct ixgbe_adapter,
4673 watchdog_task);
4674 struct net_device *netdev = adapter->netdev;
4675 struct ixgbe_hw *hw = &adapter->hw;
4676 u32 link_speed = adapter->link_speed;
4677 bool link_up = adapter->link_up;
4678 int i;
4679 struct ixgbe_ring *tx_ring;
4680 int some_tx_pending = 0;
4681
4682 adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
4683
4684 if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
4685 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
4686 if (link_up) {
4687 #ifdef CONFIG_DCB
4688 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4689 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
4690 hw->mac.ops.fc_enable(hw, i);
4691 } else {
4692 hw->mac.ops.fc_enable(hw, 0);
4693 }
4694 #else
4695 hw->mac.ops.fc_enable(hw, 0);
4696 #endif
4697 }
4698
4699 if (link_up ||
4700 time_after(jiffies, (adapter->link_check_timeout +
4701 IXGBE_TRY_LINK_TIMEOUT))) {
4702 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
4703 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
4704 }
4705 adapter->link_up = link_up;
4706 adapter->link_speed = link_speed;
4707 }
4708
4709 if (link_up) {
4710 if (!netif_carrier_ok(netdev)) {
4711 bool flow_rx, flow_tx;
4712
4713 if (hw->mac.type == ixgbe_mac_82599EB) {
4714 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
4715 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
4716 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
4717 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
4718 } else {
4719 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
4720 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
4721 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
4722 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
4723 }
4724
4725 printk(KERN_INFO "ixgbe: %s NIC Link is Up %s, "
4726 "Flow Control: %s\n",
4727 netdev->name,
4728 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
4729 "10 Gbps" :
4730 (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
4731 "1 Gbps" : "unknown speed")),
4732 ((flow_rx && flow_tx) ? "RX/TX" :
4733 (flow_rx ? "RX" :
4734 (flow_tx ? "TX" : "None"))));
4735
4736 netif_carrier_on(netdev);
4737 } else {
4738 /* Force detection of hung controller */
4739 adapter->detect_tx_hung = true;
4740 }
4741 } else {
4742 adapter->link_up = false;
4743 adapter->link_speed = 0;
4744 if (netif_carrier_ok(netdev)) {
4745 printk(KERN_INFO "ixgbe: %s NIC Link is Down\n",
4746 netdev->name);
4747 netif_carrier_off(netdev);
4748 }
4749 }
4750
4751 if (!netif_carrier_ok(netdev)) {
4752 for (i = 0; i < adapter->num_tx_queues; i++) {
4753 tx_ring = &adapter->tx_ring[i];
4754 if (tx_ring->next_to_use != tx_ring->next_to_clean) {
4755 some_tx_pending = 1;
4756 break;
4757 }
4758 }
4759
4760 if (some_tx_pending) {
4761 /* We've lost link, so the controller stops DMA,
4762 * but we've got queued Tx work that's never going
4763 * to get done, so reset controller to flush Tx.
4764 * (Do the reset outside of interrupt context).
4765 */
4766 schedule_work(&adapter->reset_task);
4767 }
4768 }
4769
4770 ixgbe_update_stats(adapter);
4771 adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
4772 }
4773
4774 static int ixgbe_tso(struct ixgbe_adapter *adapter,
4775 struct ixgbe_ring *tx_ring, struct sk_buff *skb,
4776 u32 tx_flags, u8 *hdr_len)
4777 {
4778 struct ixgbe_adv_tx_context_desc *context_desc;
4779 unsigned int i;
4780 int err;
4781 struct ixgbe_tx_buffer *tx_buffer_info;
4782 u32 vlan_macip_lens = 0, type_tucmd_mlhl;
4783 u32 mss_l4len_idx, l4len;
4784
4785 if (skb_is_gso(skb)) {
4786 if (skb_header_cloned(skb)) {
4787 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
4788 if (err)
4789 return err;
4790 }
4791 l4len = tcp_hdrlen(skb);
4792 *hdr_len += l4len;
4793
4794 if (skb->protocol == htons(ETH_P_IP)) {
4795 struct iphdr *iph = ip_hdr(skb);
4796 iph->tot_len = 0;
4797 iph->check = 0;
4798 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
4799 iph->daddr, 0,
4800 IPPROTO_TCP,
4801 0);
4802 adapter->hw_tso_ctxt++;
4803 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
4804 ipv6_hdr(skb)->payload_len = 0;
4805 tcp_hdr(skb)->check =
4806 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
4807 &ipv6_hdr(skb)->daddr,
4808 0, IPPROTO_TCP, 0);
4809 adapter->hw_tso6_ctxt++;
4810 }
4811
4812 i = tx_ring->next_to_use;
4813
4814 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4815 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4816
4817 /* VLAN MACLEN IPLEN */
4818 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4819 vlan_macip_lens |=
4820 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4821 vlan_macip_lens |= ((skb_network_offset(skb)) <<
4822 IXGBE_ADVTXD_MACLEN_SHIFT);
4823 *hdr_len += skb_network_offset(skb);
4824 vlan_macip_lens |=
4825 (skb_transport_header(skb) - skb_network_header(skb));
4826 *hdr_len +=
4827 (skb_transport_header(skb) - skb_network_header(skb));
4828 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4829 context_desc->seqnum_seed = 0;
4830
4831 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
4832 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
4833 IXGBE_ADVTXD_DTYP_CTXT);
4834
4835 if (skb->protocol == htons(ETH_P_IP))
4836 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4837 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
4838 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4839
4840 /* MSS L4LEN IDX */
4841 mss_l4len_idx =
4842 (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
4843 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
4844 /* use index 1 for TSO */
4845 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
4846 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
4847
4848 tx_buffer_info->time_stamp = jiffies;
4849 tx_buffer_info->next_to_watch = i;
4850
4851 i++;
4852 if (i == tx_ring->count)
4853 i = 0;
4854 tx_ring->next_to_use = i;
4855
4856 return true;
4857 }
4858 return false;
4859 }
4860
4861 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
4862 struct ixgbe_ring *tx_ring,
4863 struct sk_buff *skb, u32 tx_flags)
4864 {
4865 struct ixgbe_adv_tx_context_desc *context_desc;
4866 unsigned int i;
4867 struct ixgbe_tx_buffer *tx_buffer_info;
4868 u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
4869
4870 if (skb->ip_summed == CHECKSUM_PARTIAL ||
4871 (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
4872 i = tx_ring->next_to_use;
4873 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4874 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
4875
4876 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
4877 vlan_macip_lens |=
4878 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
4879 vlan_macip_lens |= (skb_network_offset(skb) <<
4880 IXGBE_ADVTXD_MACLEN_SHIFT);
4881 if (skb->ip_summed == CHECKSUM_PARTIAL)
4882 vlan_macip_lens |= (skb_transport_header(skb) -
4883 skb_network_header(skb));
4884
4885 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
4886 context_desc->seqnum_seed = 0;
4887
4888 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
4889 IXGBE_ADVTXD_DTYP_CTXT);
4890
4891 if (skb->ip_summed == CHECKSUM_PARTIAL) {
4892 switch (skb->protocol) {
4893 case cpu_to_be16(ETH_P_IP):
4894 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
4895 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
4896 type_tucmd_mlhl |=
4897 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4898 else if (ip_hdr(skb)->protocol == IPPROTO_SCTP)
4899 type_tucmd_mlhl |=
4900 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4901 break;
4902 case cpu_to_be16(ETH_P_IPV6):
4903 /* XXX what about other V6 headers?? */
4904 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
4905 type_tucmd_mlhl |=
4906 IXGBE_ADVTXD_TUCMD_L4T_TCP;
4907 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_SCTP)
4908 type_tucmd_mlhl |=
4909 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
4910 break;
4911 default:
4912 if (unlikely(net_ratelimit())) {
4913 DPRINTK(PROBE, WARNING,
4914 "partial checksum but proto=%x!\n",
4915 skb->protocol);
4916 }
4917 break;
4918 }
4919 }
4920
4921 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
4922 /* use index zero for tx checksum offload */
4923 context_desc->mss_l4len_idx = 0;
4924
4925 tx_buffer_info->time_stamp = jiffies;
4926 tx_buffer_info->next_to_watch = i;
4927
4928 adapter->hw_csum_tx_good++;
4929 i++;
4930 if (i == tx_ring->count)
4931 i = 0;
4932 tx_ring->next_to_use = i;
4933
4934 return true;
4935 }
4936
4937 return false;
4938 }
4939
4940 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
4941 struct ixgbe_ring *tx_ring,
4942 struct sk_buff *skb, u32 tx_flags,
4943 unsigned int first)
4944 {
4945 struct ixgbe_tx_buffer *tx_buffer_info;
4946 unsigned int len;
4947 unsigned int total = skb->len;
4948 unsigned int offset = 0, size, count = 0, i;
4949 unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
4950 unsigned int f;
4951 dma_addr_t *map;
4952
4953 i = tx_ring->next_to_use;
4954
4955 if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
4956 dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
4957 return 0;
4958 }
4959
4960 map = skb_shinfo(skb)->dma_maps;
4961
4962 if (tx_flags & IXGBE_TX_FLAGS_FCOE)
4963 /* excluding fcoe_crc_eof for FCoE */
4964 total -= sizeof(struct fcoe_crc_eof);
4965
4966 len = min(skb_headlen(skb), total);
4967 while (len) {
4968 tx_buffer_info = &tx_ring->tx_buffer_info[i];
4969 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
4970
4971 tx_buffer_info->length = size;
4972 tx_buffer_info->dma = skb_shinfo(skb)->dma_head + offset;
4973 tx_buffer_info->time_stamp = jiffies;
4974 tx_buffer_info->next_to_watch = i;
4975
4976 len -= size;
4977 total -= size;
4978 offset += size;
4979 count++;
4980
4981 if (len) {
4982 i++;
4983 if (i == tx_ring->count)
4984 i = 0;
4985 }
4986 }
4987
4988 for (f = 0; f < nr_frags; f++) {
4989 struct skb_frag_struct *frag;
4990
4991 frag = &skb_shinfo(skb)->frags[f];
4992 len = min((unsigned int)frag->size, total);
4993 offset = 0;
4994
4995 while (len) {
4996 i++;
4997 if (i == tx_ring->count)
4998 i = 0;
4999
5000 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5001 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
5002
5003 tx_buffer_info->length = size;
5004 tx_buffer_info->dma = map[f] + offset;
5005 tx_buffer_info->time_stamp = jiffies;
5006 tx_buffer_info->next_to_watch = i;
5007
5008 len -= size;
5009 total -= size;
5010 offset += size;
5011 count++;
5012 }
5013 if (total == 0)
5014 break;
5015 }
5016
5017 tx_ring->tx_buffer_info[i].skb = skb;
5018 tx_ring->tx_buffer_info[first].next_to_watch = i;
5019
5020 return count;
5021 }
5022
5023 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
5024 struct ixgbe_ring *tx_ring,
5025 int tx_flags, int count, u32 paylen, u8 hdr_len)
5026 {
5027 union ixgbe_adv_tx_desc *tx_desc = NULL;
5028 struct ixgbe_tx_buffer *tx_buffer_info;
5029 u32 olinfo_status = 0, cmd_type_len = 0;
5030 unsigned int i;
5031 u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
5032
5033 cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
5034
5035 cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
5036
5037 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5038 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
5039
5040 if (tx_flags & IXGBE_TX_FLAGS_TSO) {
5041 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
5042
5043 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
5044 IXGBE_ADVTXD_POPTS_SHIFT;
5045
5046 /* use index 1 context for tso */
5047 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
5048 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
5049 olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
5050 IXGBE_ADVTXD_POPTS_SHIFT;
5051
5052 } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
5053 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
5054 IXGBE_ADVTXD_POPTS_SHIFT;
5055
5056 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
5057 olinfo_status |= IXGBE_ADVTXD_CC;
5058 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
5059 if (tx_flags & IXGBE_TX_FLAGS_FSO)
5060 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
5061 }
5062
5063 olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
5064
5065 i = tx_ring->next_to_use;
5066 while (count--) {
5067 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5068 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
5069 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
5070 tx_desc->read.cmd_type_len =
5071 cpu_to_le32(cmd_type_len | tx_buffer_info->length);
5072 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
5073 i++;
5074 if (i == tx_ring->count)
5075 i = 0;
5076 }
5077
5078 tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
5079
5080 /*
5081 * Force memory writes to complete before letting h/w
5082 * know there are new descriptors to fetch. (Only
5083 * applicable for weak-ordered memory model archs,
5084 * such as IA-64).
5085 */
5086 wmb();
5087
5088 tx_ring->next_to_use = i;
5089 writel(i, adapter->hw.hw_addr + tx_ring->tail);
5090 }
5091
5092 static void ixgbe_atr(struct ixgbe_adapter *adapter, struct sk_buff *skb,
5093 int queue, u32 tx_flags)
5094 {
5095 /* Right now, we support IPv4 only */
5096 struct ixgbe_atr_input atr_input;
5097 struct tcphdr *th;
5098 struct iphdr *iph = ip_hdr(skb);
5099 struct ethhdr *eth = (struct ethhdr *)skb->data;
5100 u16 vlan_id, src_port, dst_port, flex_bytes;
5101 u32 src_ipv4_addr, dst_ipv4_addr;
5102 u8 l4type = 0;
5103
5104 /* check if we're UDP or TCP */
5105 if (iph->protocol == IPPROTO_TCP) {
5106 th = tcp_hdr(skb);
5107 src_port = th->source;
5108 dst_port = th->dest;
5109 l4type |= IXGBE_ATR_L4TYPE_TCP;
5110 /* l4type IPv4 type is 0, no need to assign */
5111 } else {
5112 /* Unsupported L4 header, just bail here */
5113 return;
5114 }
5115
5116 memset(&atr_input, 0, sizeof(struct ixgbe_atr_input));
5117
5118 vlan_id = (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK) >>
5119 IXGBE_TX_FLAGS_VLAN_SHIFT;
5120 src_ipv4_addr = iph->saddr;
5121 dst_ipv4_addr = iph->daddr;
5122 flex_bytes = eth->h_proto;
5123
5124 ixgbe_atr_set_vlan_id_82599(&atr_input, vlan_id);
5125 ixgbe_atr_set_src_port_82599(&atr_input, dst_port);
5126 ixgbe_atr_set_dst_port_82599(&atr_input, src_port);
5127 ixgbe_atr_set_flex_byte_82599(&atr_input, flex_bytes);
5128 ixgbe_atr_set_l4type_82599(&atr_input, l4type);
5129 /* src and dst are inverted, think how the receiver sees them */
5130 ixgbe_atr_set_src_ipv4_82599(&atr_input, dst_ipv4_addr);
5131 ixgbe_atr_set_dst_ipv4_82599(&atr_input, src_ipv4_addr);
5132
5133 /* This assumes the Rx queue and Tx queue are bound to the same CPU */
5134 ixgbe_fdir_add_signature_filter_82599(&adapter->hw, &atr_input, queue);
5135 }
5136
5137 static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
5138 struct ixgbe_ring *tx_ring, int size)
5139 {
5140 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5141
5142 netif_stop_subqueue(netdev, tx_ring->queue_index);
5143 /* Herbert's original patch had:
5144 * smp_mb__after_netif_stop_queue();
5145 * but since that doesn't exist yet, just open code it. */
5146 smp_mb();
5147
5148 /* We need to check again in a case another CPU has just
5149 * made room available. */
5150 if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
5151 return -EBUSY;
5152
5153 /* A reprieve! - use start_queue because it doesn't call schedule */
5154 netif_start_subqueue(netdev, tx_ring->queue_index);
5155 ++adapter->restart_queue;
5156 return 0;
5157 }
5158
5159 static int ixgbe_maybe_stop_tx(struct net_device *netdev,
5160 struct ixgbe_ring *tx_ring, int size)
5161 {
5162 if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
5163 return 0;
5164 return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
5165 }
5166
5167 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
5168 {
5169 struct ixgbe_adapter *adapter = netdev_priv(dev);
5170
5171 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
5172 return smp_processor_id();
5173
5174 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
5175 return (skb->vlan_tci & IXGBE_TX_FLAGS_VLAN_PRIO_MASK) >> 13;
5176
5177 return skb_tx_hash(dev, skb);
5178 }
5179
5180 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
5181 struct net_device *netdev)
5182 {
5183 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5184 struct ixgbe_ring *tx_ring;
5185 unsigned int first;
5186 unsigned int tx_flags = 0;
5187 u8 hdr_len = 0;
5188 int r_idx = 0, tso;
5189 int count = 0;
5190 unsigned int f;
5191
5192 if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
5193 tx_flags |= vlan_tx_tag_get(skb);
5194 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5195 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
5196 tx_flags |= (skb->queue_mapping << 13);
5197 }
5198 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
5199 tx_flags |= IXGBE_TX_FLAGS_VLAN;
5200 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5201 if (skb->priority != TC_PRIO_CONTROL) {
5202 tx_flags |= (skb->queue_mapping << 13);
5203 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
5204 tx_flags |= IXGBE_TX_FLAGS_VLAN;
5205 } else {
5206 skb->queue_mapping =
5207 adapter->ring_feature[RING_F_DCB].indices-1;
5208 }
5209 }
5210
5211 r_idx = skb->queue_mapping;
5212 tx_ring = &adapter->tx_ring[r_idx];
5213
5214 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
5215 (skb->protocol == htons(ETH_P_FCOE))) {
5216 tx_flags |= IXGBE_TX_FLAGS_FCOE;
5217 #ifdef IXGBE_FCOE
5218 r_idx = smp_processor_id();
5219 r_idx &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
5220 r_idx += adapter->ring_feature[RING_F_FCOE].mask;
5221 tx_ring = &adapter->tx_ring[r_idx];
5222 #endif
5223 }
5224 /* four things can cause us to need a context descriptor */
5225 if (skb_is_gso(skb) ||
5226 (skb->ip_summed == CHECKSUM_PARTIAL) ||
5227 (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
5228 (tx_flags & IXGBE_TX_FLAGS_FCOE))
5229 count++;
5230
5231 count += TXD_USE_COUNT(skb_headlen(skb));
5232 for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
5233 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
5234
5235 if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
5236 adapter->tx_busy++;
5237 return NETDEV_TX_BUSY;
5238 }
5239
5240 first = tx_ring->next_to_use;
5241 if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
5242 #ifdef IXGBE_FCOE
5243 /* setup tx offload for FCoE */
5244 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
5245 if (tso < 0) {
5246 dev_kfree_skb_any(skb);
5247 return NETDEV_TX_OK;
5248 }
5249 if (tso)
5250 tx_flags |= IXGBE_TX_FLAGS_FSO;
5251 #endif /* IXGBE_FCOE */
5252 } else {
5253 if (skb->protocol == htons(ETH_P_IP))
5254 tx_flags |= IXGBE_TX_FLAGS_IPV4;
5255 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
5256 if (tso < 0) {
5257 dev_kfree_skb_any(skb);
5258 return NETDEV_TX_OK;
5259 }
5260
5261 if (tso)
5262 tx_flags |= IXGBE_TX_FLAGS_TSO;
5263 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
5264 (skb->ip_summed == CHECKSUM_PARTIAL))
5265 tx_flags |= IXGBE_TX_FLAGS_CSUM;
5266 }
5267
5268 count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first);
5269 if (count) {
5270 /* add the ATR filter if ATR is on */
5271 if (tx_ring->atr_sample_rate) {
5272 ++tx_ring->atr_count;
5273 if ((tx_ring->atr_count >= tx_ring->atr_sample_rate) &&
5274 test_bit(__IXGBE_FDIR_INIT_DONE,
5275 &tx_ring->reinit_state)) {
5276 ixgbe_atr(adapter, skb, tx_ring->queue_index,
5277 tx_flags);
5278 tx_ring->atr_count = 0;
5279 }
5280 }
5281 ixgbe_tx_queue(adapter, tx_ring, tx_flags, count, skb->len,
5282 hdr_len);
5283 ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
5284
5285 } else {
5286 dev_kfree_skb_any(skb);
5287 tx_ring->tx_buffer_info[first].time_stamp = 0;
5288 tx_ring->next_to_use = first;
5289 }
5290
5291 return NETDEV_TX_OK;
5292 }
5293
5294 /**
5295 * ixgbe_get_stats - Get System Network Statistics
5296 * @netdev: network interface device structure
5297 *
5298 * Returns the address of the device statistics structure.
5299 * The statistics are actually updated from the timer callback.
5300 **/
5301 static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
5302 {
5303 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5304
5305 /* only return the current stats */
5306 return &adapter->net_stats;
5307 }
5308
5309 /**
5310 * ixgbe_set_mac - Change the Ethernet Address of the NIC
5311 * @netdev: network interface device structure
5312 * @p: pointer to an address structure
5313 *
5314 * Returns 0 on success, negative on failure
5315 **/
5316 static int ixgbe_set_mac(struct net_device *netdev, void *p)
5317 {
5318 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5319 struct ixgbe_hw *hw = &adapter->hw;
5320 struct sockaddr *addr = p;
5321
5322 if (!is_valid_ether_addr(addr->sa_data))
5323 return -EADDRNOTAVAIL;
5324
5325 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
5326 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
5327
5328 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0, IXGBE_RAH_AV);
5329
5330 return 0;
5331 }
5332
5333 static int
5334 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
5335 {
5336 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5337 struct ixgbe_hw *hw = &adapter->hw;
5338 u16 value;
5339 int rc;
5340
5341 if (prtad != hw->phy.mdio.prtad)
5342 return -EINVAL;
5343 rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
5344 if (!rc)
5345 rc = value;
5346 return rc;
5347 }
5348
5349 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
5350 u16 addr, u16 value)
5351 {
5352 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5353 struct ixgbe_hw *hw = &adapter->hw;
5354
5355 if (prtad != hw->phy.mdio.prtad)
5356 return -EINVAL;
5357 return hw->phy.ops.write_reg(hw, addr, devad, value);
5358 }
5359
5360 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
5361 {
5362 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5363
5364 return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
5365 }
5366
5367 /**
5368 * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
5369 * netdev->dev_addrs
5370 * @netdev: network interface device structure
5371 *
5372 * Returns non-zero on failure
5373 **/
5374 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
5375 {
5376 int err = 0;
5377 struct ixgbe_adapter *adapter = netdev_priv(dev);
5378 struct ixgbe_mac_info *mac = &adapter->hw.mac;
5379
5380 if (is_valid_ether_addr(mac->san_addr)) {
5381 rtnl_lock();
5382 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
5383 rtnl_unlock();
5384 }
5385 return err;
5386 }
5387
5388 /**
5389 * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
5390 * netdev->dev_addrs
5391 * @netdev: network interface device structure
5392 *
5393 * Returns non-zero on failure
5394 **/
5395 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
5396 {
5397 int err = 0;
5398 struct ixgbe_adapter *adapter = netdev_priv(dev);
5399 struct ixgbe_mac_info *mac = &adapter->hw.mac;
5400
5401 if (is_valid_ether_addr(mac->san_addr)) {
5402 rtnl_lock();
5403 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
5404 rtnl_unlock();
5405 }
5406 return err;
5407 }
5408
5409 #ifdef CONFIG_NET_POLL_CONTROLLER
5410 /*
5411 * Polling 'interrupt' - used by things like netconsole to send skbs
5412 * without having to re-enable interrupts. It's not called while
5413 * the interrupt routine is executing.
5414 */
5415 static void ixgbe_netpoll(struct net_device *netdev)
5416 {
5417 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5418 int i;
5419
5420 adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
5421 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
5422 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
5423 for (i = 0; i < num_q_vectors; i++) {
5424 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
5425 ixgbe_msix_clean_many(0, q_vector);
5426 }
5427 } else {
5428 ixgbe_intr(adapter->pdev->irq, netdev);
5429 }
5430 adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
5431 }
5432 #endif
5433
5434 static const struct net_device_ops ixgbe_netdev_ops = {
5435 .ndo_open = ixgbe_open,
5436 .ndo_stop = ixgbe_close,
5437 .ndo_start_xmit = ixgbe_xmit_frame,
5438 .ndo_select_queue = ixgbe_select_queue,
5439 .ndo_get_stats = ixgbe_get_stats,
5440 .ndo_set_rx_mode = ixgbe_set_rx_mode,
5441 .ndo_set_multicast_list = ixgbe_set_rx_mode,
5442 .ndo_validate_addr = eth_validate_addr,
5443 .ndo_set_mac_address = ixgbe_set_mac,
5444 .ndo_change_mtu = ixgbe_change_mtu,
5445 .ndo_tx_timeout = ixgbe_tx_timeout,
5446 .ndo_vlan_rx_register = ixgbe_vlan_rx_register,
5447 .ndo_vlan_rx_add_vid = ixgbe_vlan_rx_add_vid,
5448 .ndo_vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid,
5449 .ndo_do_ioctl = ixgbe_ioctl,
5450 #ifdef CONFIG_NET_POLL_CONTROLLER
5451 .ndo_poll_controller = ixgbe_netpoll,
5452 #endif
5453 #ifdef IXGBE_FCOE
5454 .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
5455 .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
5456 .ndo_fcoe_enable = ixgbe_fcoe_enable,
5457 .ndo_fcoe_disable = ixgbe_fcoe_disable,
5458 #endif /* IXGBE_FCOE */
5459 };
5460
5461 /**
5462 * ixgbe_probe - Device Initialization Routine
5463 * @pdev: PCI device information struct
5464 * @ent: entry in ixgbe_pci_tbl
5465 *
5466 * Returns 0 on success, negative on failure
5467 *
5468 * ixgbe_probe initializes an adapter identified by a pci_dev structure.
5469 * The OS initialization, configuring of the adapter private structure,
5470 * and a hardware reset occur.
5471 **/
5472 static int __devinit ixgbe_probe(struct pci_dev *pdev,
5473 const struct pci_device_id *ent)
5474 {
5475 struct net_device *netdev;
5476 struct ixgbe_adapter *adapter = NULL;
5477 struct ixgbe_hw *hw;
5478 const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
5479 static int cards_found;
5480 int i, err, pci_using_dac;
5481 #ifdef IXGBE_FCOE
5482 u16 device_caps;
5483 #endif
5484 u32 part_num, eec;
5485
5486 err = pci_enable_device_mem(pdev);
5487 if (err)
5488 return err;
5489
5490 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) &&
5491 !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) {
5492 pci_using_dac = 1;
5493 } else {
5494 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5495 if (err) {
5496 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
5497 if (err) {
5498 dev_err(&pdev->dev, "No usable DMA "
5499 "configuration, aborting\n");
5500 goto err_dma;
5501 }
5502 }
5503 pci_using_dac = 0;
5504 }
5505
5506 err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
5507 IORESOURCE_MEM), ixgbe_driver_name);
5508 if (err) {
5509 dev_err(&pdev->dev,
5510 "pci_request_selected_regions failed 0x%x\n", err);
5511 goto err_pci_reg;
5512 }
5513
5514 pci_enable_pcie_error_reporting(pdev);
5515
5516 pci_set_master(pdev);
5517 pci_save_state(pdev);
5518
5519 netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES);
5520 if (!netdev) {
5521 err = -ENOMEM;
5522 goto err_alloc_etherdev;
5523 }
5524
5525 SET_NETDEV_DEV(netdev, &pdev->dev);
5526
5527 pci_set_drvdata(pdev, netdev);
5528 adapter = netdev_priv(netdev);
5529
5530 adapter->netdev = netdev;
5531 adapter->pdev = pdev;
5532 hw = &adapter->hw;
5533 hw->back = adapter;
5534 adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
5535
5536 hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
5537 pci_resource_len(pdev, 0));
5538 if (!hw->hw_addr) {
5539 err = -EIO;
5540 goto err_ioremap;
5541 }
5542
5543 for (i = 1; i <= 5; i++) {
5544 if (pci_resource_len(pdev, i) == 0)
5545 continue;
5546 }
5547
5548 netdev->netdev_ops = &ixgbe_netdev_ops;
5549 ixgbe_set_ethtool_ops(netdev);
5550 netdev->watchdog_timeo = 5 * HZ;
5551 strcpy(netdev->name, pci_name(pdev));
5552
5553 adapter->bd_number = cards_found;
5554
5555 /* Setup hw api */
5556 memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
5557 hw->mac.type = ii->mac;
5558
5559 /* EEPROM */
5560 memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
5561 eec = IXGBE_READ_REG(hw, IXGBE_EEC);
5562 /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
5563 if (!(eec & (1 << 8)))
5564 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
5565
5566 /* PHY */
5567 memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
5568 hw->phy.sfp_type = ixgbe_sfp_type_unknown;
5569 /* ixgbe_identify_phy_generic will set prtad and mmds properly */
5570 hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
5571 hw->phy.mdio.mmds = 0;
5572 hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
5573 hw->phy.mdio.dev = netdev;
5574 hw->phy.mdio.mdio_read = ixgbe_mdio_read;
5575 hw->phy.mdio.mdio_write = ixgbe_mdio_write;
5576
5577 /* set up this timer and work struct before calling get_invariants
5578 * which might start the timer
5579 */
5580 init_timer(&adapter->sfp_timer);
5581 adapter->sfp_timer.function = &ixgbe_sfp_timer;
5582 adapter->sfp_timer.data = (unsigned long) adapter;
5583
5584 INIT_WORK(&adapter->sfp_task, ixgbe_sfp_task);
5585
5586 /* multispeed fiber has its own tasklet, called from GPI SDP1 context */
5587 INIT_WORK(&adapter->multispeed_fiber_task, ixgbe_multispeed_fiber_task);
5588
5589 /* a new SFP+ module arrival, called from GPI SDP2 context */
5590 INIT_WORK(&adapter->sfp_config_module_task,
5591 ixgbe_sfp_config_module_task);
5592
5593 ii->get_invariants(hw);
5594
5595 /* setup the private structure */
5596 err = ixgbe_sw_init(adapter);
5597 if (err)
5598 goto err_sw_init;
5599
5600 /*
5601 * If there is a fan on this device and it has failed log the
5602 * failure.
5603 */
5604 if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
5605 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
5606 if (esdp & IXGBE_ESDP_SDP1)
5607 DPRINTK(PROBE, CRIT,
5608 "Fan has stopped, replace the adapter\n");
5609 }
5610
5611 /* reset_hw fills in the perm_addr as well */
5612 err = hw->mac.ops.reset_hw(hw);
5613 if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
5614 hw->mac.type == ixgbe_mac_82598EB) {
5615 /*
5616 * Start a kernel thread to watch for a module to arrive.
5617 * Only do this for 82598, since 82599 will generate
5618 * interrupts on module arrival.
5619 */
5620 set_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5621 mod_timer(&adapter->sfp_timer,
5622 round_jiffies(jiffies + (2 * HZ)));
5623 err = 0;
5624 } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5625 dev_err(&adapter->pdev->dev, "failed to initialize because "
5626 "an unsupported SFP+ module type was detected.\n"
5627 "Reload the driver after installing a supported "
5628 "module.\n");
5629 goto err_sw_init;
5630 } else if (err) {
5631 dev_err(&adapter->pdev->dev, "HW Init failed: %d\n", err);
5632 goto err_sw_init;
5633 }
5634
5635 netdev->features = NETIF_F_SG |
5636 NETIF_F_IP_CSUM |
5637 NETIF_F_HW_VLAN_TX |
5638 NETIF_F_HW_VLAN_RX |
5639 NETIF_F_HW_VLAN_FILTER;
5640
5641 netdev->features |= NETIF_F_IPV6_CSUM;
5642 netdev->features |= NETIF_F_TSO;
5643 netdev->features |= NETIF_F_TSO6;
5644 netdev->features |= NETIF_F_GRO;
5645
5646 if (adapter->hw.mac.type == ixgbe_mac_82599EB)
5647 netdev->features |= NETIF_F_SCTP_CSUM;
5648
5649 netdev->vlan_features |= NETIF_F_TSO;
5650 netdev->vlan_features |= NETIF_F_TSO6;
5651 netdev->vlan_features |= NETIF_F_IP_CSUM;
5652 netdev->vlan_features |= NETIF_F_IPV6_CSUM;
5653 netdev->vlan_features |= NETIF_F_SG;
5654
5655 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
5656 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
5657
5658 #ifdef CONFIG_IXGBE_DCB
5659 netdev->dcbnl_ops = &dcbnl_ops;
5660 #endif
5661
5662 #ifdef IXGBE_FCOE
5663 if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
5664 if (hw->mac.ops.get_device_caps) {
5665 hw->mac.ops.get_device_caps(hw, &device_caps);
5666 if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
5667 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
5668 }
5669 }
5670 #endif /* IXGBE_FCOE */
5671 if (pci_using_dac)
5672 netdev->features |= NETIF_F_HIGHDMA;
5673
5674 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
5675 netdev->features |= NETIF_F_LRO;
5676
5677 /* make sure the EEPROM is good */
5678 if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
5679 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
5680 err = -EIO;
5681 goto err_eeprom;
5682 }
5683
5684 memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
5685 memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
5686
5687 if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
5688 dev_err(&pdev->dev, "invalid MAC address\n");
5689 err = -EIO;
5690 goto err_eeprom;
5691 }
5692
5693 init_timer(&adapter->watchdog_timer);
5694 adapter->watchdog_timer.function = &ixgbe_watchdog;
5695 adapter->watchdog_timer.data = (unsigned long)adapter;
5696
5697 INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
5698 INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
5699
5700 err = ixgbe_init_interrupt_scheme(adapter);
5701 if (err)
5702 goto err_sw_init;
5703
5704 switch (pdev->device) {
5705 case IXGBE_DEV_ID_82599_KX4:
5706 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
5707 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
5708 /* Enable ACPI wakeup in GRC */
5709 IXGBE_WRITE_REG(hw, IXGBE_GRC,
5710 (IXGBE_READ_REG(hw, IXGBE_GRC) & ~IXGBE_GRC_APME));
5711 break;
5712 default:
5713 adapter->wol = 0;
5714 break;
5715 }
5716 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
5717
5718 /* pick up the PCI bus settings for reporting later */
5719 hw->mac.ops.get_bus_info(hw);
5720
5721 /* print bus type/speed/width info */
5722 dev_info(&pdev->dev, "(PCI Express:%s:%s) %pM\n",
5723 ((hw->bus.speed == ixgbe_bus_speed_5000) ? "5.0Gb/s":
5724 (hw->bus.speed == ixgbe_bus_speed_2500) ? "2.5Gb/s":"Unknown"),
5725 ((hw->bus.width == ixgbe_bus_width_pcie_x8) ? "Width x8" :
5726 (hw->bus.width == ixgbe_bus_width_pcie_x4) ? "Width x4" :
5727 (hw->bus.width == ixgbe_bus_width_pcie_x1) ? "Width x1" :
5728 "Unknown"),
5729 netdev->dev_addr);
5730 ixgbe_read_pba_num_generic(hw, &part_num);
5731 if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
5732 dev_info(&pdev->dev, "MAC: %d, PHY: %d, SFP+: %d, PBA No: %06x-%03x\n",
5733 hw->mac.type, hw->phy.type, hw->phy.sfp_type,
5734 (part_num >> 8), (part_num & 0xff));
5735 else
5736 dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
5737 hw->mac.type, hw->phy.type,
5738 (part_num >> 8), (part_num & 0xff));
5739
5740 if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
5741 dev_warn(&pdev->dev, "PCI-Express bandwidth available for "
5742 "this card is not sufficient for optimal "
5743 "performance.\n");
5744 dev_warn(&pdev->dev, "For optimal performance a x8 "
5745 "PCI-Express slot is required.\n");
5746 }
5747
5748 /* save off EEPROM version number */
5749 hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
5750
5751 /* reset the hardware with the new settings */
5752 err = hw->mac.ops.start_hw(hw);
5753
5754 if (err == IXGBE_ERR_EEPROM_VERSION) {
5755 /* We are running on a pre-production device, log a warning */
5756 dev_warn(&pdev->dev, "This device is a pre-production "
5757 "adapter/LOM. Please be aware there may be issues "
5758 "associated with your hardware. If you are "
5759 "experiencing problems please contact your Intel or "
5760 "hardware representative who provided you with this "
5761 "hardware.\n");
5762 }
5763 strcpy(netdev->name, "eth%d");
5764 err = register_netdev(netdev);
5765 if (err)
5766 goto err_register;
5767
5768 /* carrier off reporting is important to ethtool even BEFORE open */
5769 netif_carrier_off(netdev);
5770
5771 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
5772 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
5773 INIT_WORK(&adapter->fdir_reinit_task, ixgbe_fdir_reinit_task);
5774
5775 #ifdef CONFIG_IXGBE_DCA
5776 if (dca_add_requester(&pdev->dev) == 0) {
5777 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
5778 ixgbe_setup_dca(adapter);
5779 }
5780 #endif
5781 /* add san mac addr to netdev */
5782 ixgbe_add_sanmac_netdev(netdev);
5783
5784 dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
5785 cards_found++;
5786 return 0;
5787
5788 err_register:
5789 ixgbe_release_hw_control(adapter);
5790 ixgbe_clear_interrupt_scheme(adapter);
5791 err_sw_init:
5792 err_eeprom:
5793 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5794 del_timer_sync(&adapter->sfp_timer);
5795 cancel_work_sync(&adapter->sfp_task);
5796 cancel_work_sync(&adapter->multispeed_fiber_task);
5797 cancel_work_sync(&adapter->sfp_config_module_task);
5798 iounmap(hw->hw_addr);
5799 err_ioremap:
5800 free_netdev(netdev);
5801 err_alloc_etherdev:
5802 pci_release_selected_regions(pdev, pci_select_bars(pdev,
5803 IORESOURCE_MEM));
5804 err_pci_reg:
5805 err_dma:
5806 pci_disable_device(pdev);
5807 return err;
5808 }
5809
5810 /**
5811 * ixgbe_remove - Device Removal Routine
5812 * @pdev: PCI device information struct
5813 *
5814 * ixgbe_remove is called by the PCI subsystem to alert the driver
5815 * that it should release a PCI device. The could be caused by a
5816 * Hot-Plug event, or because the driver is going to be removed from
5817 * memory.
5818 **/
5819 static void __devexit ixgbe_remove(struct pci_dev *pdev)
5820 {
5821 struct net_device *netdev = pci_get_drvdata(pdev);
5822 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5823
5824 set_bit(__IXGBE_DOWN, &adapter->state);
5825 /* clear the module not found bit to make sure the worker won't
5826 * reschedule
5827 */
5828 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
5829 del_timer_sync(&adapter->watchdog_timer);
5830
5831 del_timer_sync(&adapter->sfp_timer);
5832 cancel_work_sync(&adapter->watchdog_task);
5833 cancel_work_sync(&adapter->sfp_task);
5834 cancel_work_sync(&adapter->multispeed_fiber_task);
5835 cancel_work_sync(&adapter->sfp_config_module_task);
5836 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
5837 adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
5838 cancel_work_sync(&adapter->fdir_reinit_task);
5839 flush_scheduled_work();
5840
5841 #ifdef CONFIG_IXGBE_DCA
5842 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
5843 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
5844 dca_remove_requester(&pdev->dev);
5845 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
5846 }
5847
5848 #endif
5849 #ifdef IXGBE_FCOE
5850 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
5851 ixgbe_cleanup_fcoe(adapter);
5852
5853 #endif /* IXGBE_FCOE */
5854
5855 /* remove the added san mac */
5856 ixgbe_del_sanmac_netdev(netdev);
5857
5858 if (netdev->reg_state == NETREG_REGISTERED)
5859 unregister_netdev(netdev);
5860
5861 ixgbe_clear_interrupt_scheme(adapter);
5862
5863 ixgbe_release_hw_control(adapter);
5864
5865 iounmap(adapter->hw.hw_addr);
5866 pci_release_selected_regions(pdev, pci_select_bars(pdev,
5867 IORESOURCE_MEM));
5868
5869 DPRINTK(PROBE, INFO, "complete\n");
5870
5871 free_netdev(netdev);
5872
5873 pci_disable_pcie_error_reporting(pdev);
5874
5875 pci_disable_device(pdev);
5876 }
5877
5878 /**
5879 * ixgbe_io_error_detected - called when PCI error is detected
5880 * @pdev: Pointer to PCI device
5881 * @state: The current pci connection state
5882 *
5883 * This function is called after a PCI bus error affecting
5884 * this device has been detected.
5885 */
5886 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
5887 pci_channel_state_t state)
5888 {
5889 struct net_device *netdev = pci_get_drvdata(pdev);
5890 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5891
5892 netif_device_detach(netdev);
5893
5894 if (state == pci_channel_io_perm_failure)
5895 return PCI_ERS_RESULT_DISCONNECT;
5896
5897 if (netif_running(netdev))
5898 ixgbe_down(adapter);
5899 pci_disable_device(pdev);
5900
5901 /* Request a slot reset. */
5902 return PCI_ERS_RESULT_NEED_RESET;
5903 }
5904
5905 /**
5906 * ixgbe_io_slot_reset - called after the pci bus has been reset.
5907 * @pdev: Pointer to PCI device
5908 *
5909 * Restart the card from scratch, as if from a cold-boot.
5910 */
5911 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
5912 {
5913 struct net_device *netdev = pci_get_drvdata(pdev);
5914 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5915 pci_ers_result_t result;
5916 int err;
5917
5918 if (pci_enable_device_mem(pdev)) {
5919 DPRINTK(PROBE, ERR,
5920 "Cannot re-enable PCI device after reset.\n");
5921 result = PCI_ERS_RESULT_DISCONNECT;
5922 } else {
5923 pci_set_master(pdev);
5924 pci_restore_state(pdev);
5925
5926 pci_wake_from_d3(pdev, false);
5927
5928 ixgbe_reset(adapter);
5929 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5930 result = PCI_ERS_RESULT_RECOVERED;
5931 }
5932
5933 err = pci_cleanup_aer_uncorrect_error_status(pdev);
5934 if (err) {
5935 dev_err(&pdev->dev,
5936 "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n", err);
5937 /* non-fatal, continue */
5938 }
5939
5940 return result;
5941 }
5942
5943 /**
5944 * ixgbe_io_resume - called when traffic can start flowing again.
5945 * @pdev: Pointer to PCI device
5946 *
5947 * This callback is called when the error recovery driver tells us that
5948 * its OK to resume normal operation.
5949 */
5950 static void ixgbe_io_resume(struct pci_dev *pdev)
5951 {
5952 struct net_device *netdev = pci_get_drvdata(pdev);
5953 struct ixgbe_adapter *adapter = netdev_priv(netdev);
5954
5955 if (netif_running(netdev)) {
5956 if (ixgbe_up(adapter)) {
5957 DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
5958 return;
5959 }
5960 }
5961
5962 netif_device_attach(netdev);
5963 }
5964
5965 static struct pci_error_handlers ixgbe_err_handler = {
5966 .error_detected = ixgbe_io_error_detected,
5967 .slot_reset = ixgbe_io_slot_reset,
5968 .resume = ixgbe_io_resume,
5969 };
5970
5971 static struct pci_driver ixgbe_driver = {
5972 .name = ixgbe_driver_name,
5973 .id_table = ixgbe_pci_tbl,
5974 .probe = ixgbe_probe,
5975 .remove = __devexit_p(ixgbe_remove),
5976 #ifdef CONFIG_PM
5977 .suspend = ixgbe_suspend,
5978 .resume = ixgbe_resume,
5979 #endif
5980 .shutdown = ixgbe_shutdown,
5981 .err_handler = &ixgbe_err_handler
5982 };
5983
5984 /**
5985 * ixgbe_init_module - Driver Registration Routine
5986 *
5987 * ixgbe_init_module is the first routine called when the driver is
5988 * loaded. All it does is register with the PCI subsystem.
5989 **/
5990 static int __init ixgbe_init_module(void)
5991 {
5992 int ret;
5993 printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
5994 ixgbe_driver_string, ixgbe_driver_version);
5995
5996 printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
5997
5998 #ifdef CONFIG_IXGBE_DCA
5999 dca_register_notify(&dca_notifier);
6000 #endif
6001
6002 ret = pci_register_driver(&ixgbe_driver);
6003 return ret;
6004 }
6005
6006 module_init(ixgbe_init_module);
6007
6008 /**
6009 * ixgbe_exit_module - Driver Exit Cleanup Routine
6010 *
6011 * ixgbe_exit_module is called just before the driver is removed
6012 * from memory.
6013 **/
6014 static void __exit ixgbe_exit_module(void)
6015 {
6016 #ifdef CONFIG_IXGBE_DCA
6017 dca_unregister_notify(&dca_notifier);
6018 #endif
6019 pci_unregister_driver(&ixgbe_driver);
6020 }
6021
6022 #ifdef CONFIG_IXGBE_DCA
6023 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
6024 void *p)
6025 {
6026 int ret_val;
6027
6028 ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
6029 __ixgbe_notify_dca);
6030
6031 return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
6032 }
6033
6034 #endif /* CONFIG_IXGBE_DCA */
6035 #ifdef DEBUG
6036 /**
6037 * ixgbe_get_hw_dev_name - return device name string
6038 * used by hardware layer to print debugging information
6039 **/
6040 char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw)
6041 {
6042 struct ixgbe_adapter *adapter = hw->back;
6043 return adapter->netdev->name;
6044 }
6045
6046 #endif
6047 module_exit(ixgbe_exit_module);
6048
6049 /* ixgbe_main.c */
Linux for Ginger Game Console