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Merge tag 'v3.3.7' into 3.3/master
[zen-stable.git] / drivers / net / ethernet / cisco / enic / enic_main.c
blob0e4edd3b6bee0275cf3ca0c01ffd1f1f60ec9d49
1 /*
2 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 *
18 */
19
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22 #include <linux/string.h>
23 #include <linux/errno.h>
24 #include <linux/types.h>
25 #include <linux/init.h>
26 #include <linux/interrupt.h>
27 #include <linux/workqueue.h>
28 #include <linux/pci.h>
29 #include <linux/netdevice.h>
30 #include <linux/etherdevice.h>
31 #include <linux/if.h>
32 #include <linux/if_ether.h>
33 #include <linux/if_vlan.h>
34 #include <linux/ethtool.h>
35 #include <linux/in.h>
36 #include <linux/ip.h>
37 #include <linux/ipv6.h>
38 #include <linux/tcp.h>
39 #include <linux/rtnetlink.h>
40 #include <linux/prefetch.h>
41 #include <net/ip6_checksum.h>
42
43 #include "cq_enet_desc.h"
44 #include "vnic_dev.h"
45 #include "vnic_intr.h"
46 #include "vnic_stats.h"
47 #include "vnic_vic.h"
48 #include "enic_res.h"
49 #include "enic.h"
50 #include "enic_dev.h"
51 #include "enic_pp.h"
52
53 #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
54 #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS)
55 #define MAX_TSO (1 << 16)
56 #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
57
58 #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */
59 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */
60 #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF 0x0071 /* enet SRIOV VF */
61
62 /* Supported devices */
63 static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
64 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
65 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
66 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) },
67 { 0, } /* end of table */
68 };
69
70 MODULE_DESCRIPTION(DRV_DESCRIPTION);
71 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
72 MODULE_LICENSE("GPL");
73 MODULE_VERSION(DRV_VERSION);
74 MODULE_DEVICE_TABLE(pci, enic_id_table);
75
76 struct enic_stat {
77 char name[ETH_GSTRING_LEN];
78 unsigned int offset;
79 };
80
81 #define ENIC_TX_STAT(stat) \
82 { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
83 #define ENIC_RX_STAT(stat) \
84 { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
85
86 static const struct enic_stat enic_tx_stats[] = {
87 ENIC_TX_STAT(tx_frames_ok),
88 ENIC_TX_STAT(tx_unicast_frames_ok),
89 ENIC_TX_STAT(tx_multicast_frames_ok),
90 ENIC_TX_STAT(tx_broadcast_frames_ok),
91 ENIC_TX_STAT(tx_bytes_ok),
92 ENIC_TX_STAT(tx_unicast_bytes_ok),
93 ENIC_TX_STAT(tx_multicast_bytes_ok),
94 ENIC_TX_STAT(tx_broadcast_bytes_ok),
95 ENIC_TX_STAT(tx_drops),
96 ENIC_TX_STAT(tx_errors),
97 ENIC_TX_STAT(tx_tso),
98 };
99
100 static const struct enic_stat enic_rx_stats[] = {
101 ENIC_RX_STAT(rx_frames_ok),
102 ENIC_RX_STAT(rx_frames_total),
103 ENIC_RX_STAT(rx_unicast_frames_ok),
104 ENIC_RX_STAT(rx_multicast_frames_ok),
105 ENIC_RX_STAT(rx_broadcast_frames_ok),
106 ENIC_RX_STAT(rx_bytes_ok),
107 ENIC_RX_STAT(rx_unicast_bytes_ok),
108 ENIC_RX_STAT(rx_multicast_bytes_ok),
109 ENIC_RX_STAT(rx_broadcast_bytes_ok),
110 ENIC_RX_STAT(rx_drop),
111 ENIC_RX_STAT(rx_no_bufs),
112 ENIC_RX_STAT(rx_errors),
113 ENIC_RX_STAT(rx_rss),
114 ENIC_RX_STAT(rx_crc_errors),
115 ENIC_RX_STAT(rx_frames_64),
116 ENIC_RX_STAT(rx_frames_127),
117 ENIC_RX_STAT(rx_frames_255),
118 ENIC_RX_STAT(rx_frames_511),
119 ENIC_RX_STAT(rx_frames_1023),
120 ENIC_RX_STAT(rx_frames_1518),
121 ENIC_RX_STAT(rx_frames_to_max),
122 };
123
124 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
125 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
126
127 int enic_is_dynamic(struct enic *enic)
128 {
129 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
130 }
131
132 int enic_sriov_enabled(struct enic *enic)
133 {
134 return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
135 }
136
137 static int enic_is_sriov_vf(struct enic *enic)
138 {
139 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
140 }
141
142 int enic_is_valid_vf(struct enic *enic, int vf)
143 {
144 #ifdef CONFIG_PCI_IOV
145 return vf >= 0 && vf < enic->num_vfs;
146 #else
147 return 0;
148 #endif
149 }
150
151 static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
152 {
153 return rq;
154 }
155
156 static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
157 {
158 return enic->rq_count + wq;
159 }
160
161 static inline unsigned int enic_legacy_io_intr(void)
162 {
163 return 0;
164 }
165
166 static inline unsigned int enic_legacy_err_intr(void)
167 {
168 return 1;
169 }
170
171 static inline unsigned int enic_legacy_notify_intr(void)
172 {
173 return 2;
174 }
175
176 static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq)
177 {
178 return enic->cq[enic_cq_rq(enic, rq)].interrupt_offset;
179 }
180
181 static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq)
182 {
183 return enic->cq[enic_cq_wq(enic, wq)].interrupt_offset;
184 }
185
186 static inline unsigned int enic_msix_err_intr(struct enic *enic)
187 {
188 return enic->rq_count + enic->wq_count;
189 }
190
191 static inline unsigned int enic_msix_notify_intr(struct enic *enic)
192 {
193 return enic->rq_count + enic->wq_count + 1;
194 }
195
196 static int enic_get_settings(struct net_device *netdev,
197 struct ethtool_cmd *ecmd)
198 {
199 struct enic *enic = netdev_priv(netdev);
200
201 ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
202 ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
203 ecmd->port = PORT_FIBRE;
204 ecmd->transceiver = XCVR_EXTERNAL;
205
206 if (netif_carrier_ok(netdev)) {
207 ethtool_cmd_speed_set(ecmd, vnic_dev_port_speed(enic->vdev));
208 ecmd->duplex = DUPLEX_FULL;
209 } else {
210 ethtool_cmd_speed_set(ecmd, -1);
211 ecmd->duplex = -1;
212 }
213
214 ecmd->autoneg = AUTONEG_DISABLE;
215
216 return 0;
217 }
218
219 static void enic_get_drvinfo(struct net_device *netdev,
220 struct ethtool_drvinfo *drvinfo)
221 {
222 struct enic *enic = netdev_priv(netdev);
223 struct vnic_devcmd_fw_info *fw_info;
224
225 enic_dev_fw_info(enic, &fw_info);
226
227 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
228 strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
229 strlcpy(drvinfo->fw_version, fw_info->fw_version,
230 sizeof(drvinfo->fw_version));
231 strlcpy(drvinfo->bus_info, pci_name(enic->pdev),
232 sizeof(drvinfo->bus_info));
233 }
234
235 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
236 {
237 unsigned int i;
238
239 switch (stringset) {
240 case ETH_SS_STATS:
241 for (i = 0; i < enic_n_tx_stats; i++) {
242 memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
243 data += ETH_GSTRING_LEN;
244 }
245 for (i = 0; i < enic_n_rx_stats; i++) {
246 memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
247 data += ETH_GSTRING_LEN;
248 }
249 break;
250 }
251 }
252
253 static int enic_get_sset_count(struct net_device *netdev, int sset)
254 {
255 switch (sset) {
256 case ETH_SS_STATS:
257 return enic_n_tx_stats + enic_n_rx_stats;
258 default:
259 return -EOPNOTSUPP;
260 }
261 }
262
263 static void enic_get_ethtool_stats(struct net_device *netdev,
264 struct ethtool_stats *stats, u64 *data)
265 {
266 struct enic *enic = netdev_priv(netdev);
267 struct vnic_stats *vstats;
268 unsigned int i;
269
270 enic_dev_stats_dump(enic, &vstats);
271
272 for (i = 0; i < enic_n_tx_stats; i++)
273 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
274 for (i = 0; i < enic_n_rx_stats; i++)
275 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
276 }
277
278 static u32 enic_get_msglevel(struct net_device *netdev)
279 {
280 struct enic *enic = netdev_priv(netdev);
281 return enic->msg_enable;
282 }
283
284 static void enic_set_msglevel(struct net_device *netdev, u32 value)
285 {
286 struct enic *enic = netdev_priv(netdev);
287 enic->msg_enable = value;
288 }
289
290 static int enic_get_coalesce(struct net_device *netdev,
291 struct ethtool_coalesce *ecmd)
292 {
293 struct enic *enic = netdev_priv(netdev);
294
295 ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
296 ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
297
298 return 0;
299 }
300
301 static int enic_set_coalesce(struct net_device *netdev,
302 struct ethtool_coalesce *ecmd)
303 {
304 struct enic *enic = netdev_priv(netdev);
305 u32 tx_coalesce_usecs;
306 u32 rx_coalesce_usecs;
307 unsigned int i, intr;
308
309 tx_coalesce_usecs = min_t(u32, ecmd->tx_coalesce_usecs,
310 vnic_dev_get_intr_coal_timer_max(enic->vdev));
311 rx_coalesce_usecs = min_t(u32, ecmd->rx_coalesce_usecs,
312 vnic_dev_get_intr_coal_timer_max(enic->vdev));
313
314 switch (vnic_dev_get_intr_mode(enic->vdev)) {
315 case VNIC_DEV_INTR_MODE_INTX:
316 if (tx_coalesce_usecs != rx_coalesce_usecs)
317 return -EINVAL;
318
319 intr = enic_legacy_io_intr();
320 vnic_intr_coalescing_timer_set(&enic->intr[intr],
321 tx_coalesce_usecs);
322 break;
323 case VNIC_DEV_INTR_MODE_MSI:
324 if (tx_coalesce_usecs != rx_coalesce_usecs)
325 return -EINVAL;
326
327 vnic_intr_coalescing_timer_set(&enic->intr[0],
328 tx_coalesce_usecs);
329 break;
330 case VNIC_DEV_INTR_MODE_MSIX:
331 for (i = 0; i < enic->wq_count; i++) {
332 intr = enic_msix_wq_intr(enic, i);
333 vnic_intr_coalescing_timer_set(&enic->intr[intr],
334 tx_coalesce_usecs);
335 }
336
337 for (i = 0; i < enic->rq_count; i++) {
338 intr = enic_msix_rq_intr(enic, i);
339 vnic_intr_coalescing_timer_set(&enic->intr[intr],
340 rx_coalesce_usecs);
341 }
342
343 break;
344 default:
345 break;
346 }
347
348 enic->tx_coalesce_usecs = tx_coalesce_usecs;
349 enic->rx_coalesce_usecs = rx_coalesce_usecs;
350
351 return 0;
352 }
353
354 static const struct ethtool_ops enic_ethtool_ops = {
355 .get_settings = enic_get_settings,
356 .get_drvinfo = enic_get_drvinfo,
357 .get_msglevel = enic_get_msglevel,
358 .set_msglevel = enic_set_msglevel,
359 .get_link = ethtool_op_get_link,
360 .get_strings = enic_get_strings,
361 .get_sset_count = enic_get_sset_count,
362 .get_ethtool_stats = enic_get_ethtool_stats,
363 .get_coalesce = enic_get_coalesce,
364 .set_coalesce = enic_set_coalesce,
365 };
366
367 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
368 {
369 struct enic *enic = vnic_dev_priv(wq->vdev);
370
371 if (buf->sop)
372 pci_unmap_single(enic->pdev, buf->dma_addr,
373 buf->len, PCI_DMA_TODEVICE);
374 else
375 pci_unmap_page(enic->pdev, buf->dma_addr,
376 buf->len, PCI_DMA_TODEVICE);
377
378 if (buf->os_buf)
379 dev_kfree_skb_any(buf->os_buf);
380 }
381
382 static void enic_wq_free_buf(struct vnic_wq *wq,
383 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
384 {
385 enic_free_wq_buf(wq, buf);
386 }
387
388 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
389 u8 type, u16 q_number, u16 completed_index, void *opaque)
390 {
391 struct enic *enic = vnic_dev_priv(vdev);
392
393 spin_lock(&enic->wq_lock[q_number]);
394
395 vnic_wq_service(&enic->wq[q_number], cq_desc,
396 completed_index, enic_wq_free_buf,
397 opaque);
398
399 if (netif_queue_stopped(enic->netdev) &&
400 vnic_wq_desc_avail(&enic->wq[q_number]) >=
401 (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
402 netif_wake_queue(enic->netdev);
403
404 spin_unlock(&enic->wq_lock[q_number]);
405
406 return 0;
407 }
408
409 static void enic_log_q_error(struct enic *enic)
410 {
411 unsigned int i;
412 u32 error_status;
413
414 for (i = 0; i < enic->wq_count; i++) {
415 error_status = vnic_wq_error_status(&enic->wq[i]);
416 if (error_status)
417 netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
418 i, error_status);
419 }
420
421 for (i = 0; i < enic->rq_count; i++) {
422 error_status = vnic_rq_error_status(&enic->rq[i]);
423 if (error_status)
424 netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
425 i, error_status);
426 }
427 }
428
429 static void enic_msglvl_check(struct enic *enic)
430 {
431 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
432
433 if (msg_enable != enic->msg_enable) {
434 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
435 enic->msg_enable, msg_enable);
436 enic->msg_enable = msg_enable;
437 }
438 }
439
440 static void enic_mtu_check(struct enic *enic)
441 {
442 u32 mtu = vnic_dev_mtu(enic->vdev);
443 struct net_device *netdev = enic->netdev;
444
445 if (mtu && mtu != enic->port_mtu) {
446 enic->port_mtu = mtu;
447 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
448 mtu = max_t(int, ENIC_MIN_MTU,
449 min_t(int, ENIC_MAX_MTU, mtu));
450 if (mtu != netdev->mtu)
451 schedule_work(&enic->change_mtu_work);
452 } else {
453 if (mtu < netdev->mtu)
454 netdev_warn(netdev,
455 "interface MTU (%d) set higher "
456 "than switch port MTU (%d)\n",
457 netdev->mtu, mtu);
458 }
459 }
460 }
461
462 static void enic_link_check(struct enic *enic)
463 {
464 int link_status = vnic_dev_link_status(enic->vdev);
465 int carrier_ok = netif_carrier_ok(enic->netdev);
466
467 if (link_status && !carrier_ok) {
468 netdev_info(enic->netdev, "Link UP\n");
469 netif_carrier_on(enic->netdev);
470 } else if (!link_status && carrier_ok) {
471 netdev_info(enic->netdev, "Link DOWN\n");
472 netif_carrier_off(enic->netdev);
473 }
474 }
475
476 static void enic_notify_check(struct enic *enic)
477 {
478 enic_msglvl_check(enic);
479 enic_mtu_check(enic);
480 enic_link_check(enic);
481 }
482
483 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
484
485 static irqreturn_t enic_isr_legacy(int irq, void *data)
486 {
487 struct net_device *netdev = data;
488 struct enic *enic = netdev_priv(netdev);
489 unsigned int io_intr = enic_legacy_io_intr();
490 unsigned int err_intr = enic_legacy_err_intr();
491 unsigned int notify_intr = enic_legacy_notify_intr();
492 u32 pba;
493
494 vnic_intr_mask(&enic->intr[io_intr]);
495
496 pba = vnic_intr_legacy_pba(enic->legacy_pba);
497 if (!pba) {
498 vnic_intr_unmask(&enic->intr[io_intr]);
499 return IRQ_NONE; /* not our interrupt */
500 }
501
502 if (ENIC_TEST_INTR(pba, notify_intr)) {
503 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
504 enic_notify_check(enic);
505 }
506
507 if (ENIC_TEST_INTR(pba, err_intr)) {
508 vnic_intr_return_all_credits(&enic->intr[err_intr]);
509 enic_log_q_error(enic);
510 /* schedule recovery from WQ/RQ error */
511 schedule_work(&enic->reset);
512 return IRQ_HANDLED;
513 }
514
515 if (ENIC_TEST_INTR(pba, io_intr)) {
516 if (napi_schedule_prep(&enic->napi[0]))
517 __napi_schedule(&enic->napi[0]);
518 } else {
519 vnic_intr_unmask(&enic->intr[io_intr]);
520 }
521
522 return IRQ_HANDLED;
523 }
524
525 static irqreturn_t enic_isr_msi(int irq, void *data)
526 {
527 struct enic *enic = data;
528
529 /* With MSI, there is no sharing of interrupts, so this is
530 * our interrupt and there is no need to ack it. The device
531 * is not providing per-vector masking, so the OS will not
532 * write to PCI config space to mask/unmask the interrupt.
533 * We're using mask_on_assertion for MSI, so the device
534 * automatically masks the interrupt when the interrupt is
535 * generated. Later, when exiting polling, the interrupt
536 * will be unmasked (see enic_poll).
537 *
538 * Also, the device uses the same PCIe Traffic Class (TC)
539 * for Memory Write data and MSI, so there are no ordering
540 * issues; the MSI will always arrive at the Root Complex
541 * _after_ corresponding Memory Writes (i.e. descriptor
542 * writes).
543 */
544
545 napi_schedule(&enic->napi[0]);
546
547 return IRQ_HANDLED;
548 }
549
550 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
551 {
552 struct napi_struct *napi = data;
553
554 /* schedule NAPI polling for RQ cleanup */
555 napi_schedule(napi);
556
557 return IRQ_HANDLED;
558 }
559
560 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
561 {
562 struct enic *enic = data;
563 unsigned int cq = enic_cq_wq(enic, 0);
564 unsigned int intr = enic_msix_wq_intr(enic, 0);
565 unsigned int wq_work_to_do = -1; /* no limit */
566 unsigned int wq_work_done;
567
568 wq_work_done = vnic_cq_service(&enic->cq[cq],
569 wq_work_to_do, enic_wq_service, NULL);
570
571 vnic_intr_return_credits(&enic->intr[intr],
572 wq_work_done,
573 1 /* unmask intr */,
574 1 /* reset intr timer */);
575
576 return IRQ_HANDLED;
577 }
578
579 static irqreturn_t enic_isr_msix_err(int irq, void *data)
580 {
581 struct enic *enic = data;
582 unsigned int intr = enic_msix_err_intr(enic);
583
584 vnic_intr_return_all_credits(&enic->intr[intr]);
585
586 enic_log_q_error(enic);
587
588 /* schedule recovery from WQ/RQ error */
589 schedule_work(&enic->reset);
590
591 return IRQ_HANDLED;
592 }
593
594 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
595 {
596 struct enic *enic = data;
597 unsigned int intr = enic_msix_notify_intr(enic);
598
599 vnic_intr_return_all_credits(&enic->intr[intr]);
600 enic_notify_check(enic);
601
602 return IRQ_HANDLED;
603 }
604
605 static inline void enic_queue_wq_skb_cont(struct enic *enic,
606 struct vnic_wq *wq, struct sk_buff *skb,
607 unsigned int len_left, int loopback)
608 {
609 const skb_frag_t *frag;
610
611 /* Queue additional data fragments */
612 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
613 len_left -= skb_frag_size(frag);
614 enic_queue_wq_desc_cont(wq, skb,
615 skb_frag_dma_map(&enic->pdev->dev,
616 frag, 0, skb_frag_size(frag),
617 DMA_TO_DEVICE),
618 skb_frag_size(frag),
619 (len_left == 0), /* EOP? */
620 loopback);
621 }
622 }
623
624 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
625 struct vnic_wq *wq, struct sk_buff *skb,
626 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
627 {
628 unsigned int head_len = skb_headlen(skb);
629 unsigned int len_left = skb->len - head_len;
630 int eop = (len_left == 0);
631
632 /* Queue the main skb fragment. The fragments are no larger
633 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
634 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
635 * per fragment is queued.
636 */
637 enic_queue_wq_desc(wq, skb,
638 pci_map_single(enic->pdev, skb->data,
639 head_len, PCI_DMA_TODEVICE),
640 head_len,
641 vlan_tag_insert, vlan_tag,
642 eop, loopback);
643
644 if (!eop)
645 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
646 }
647
648 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
649 struct vnic_wq *wq, struct sk_buff *skb,
650 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
651 {
652 unsigned int head_len = skb_headlen(skb);
653 unsigned int len_left = skb->len - head_len;
654 unsigned int hdr_len = skb_checksum_start_offset(skb);
655 unsigned int csum_offset = hdr_len + skb->csum_offset;
656 int eop = (len_left == 0);
657
658 /* Queue the main skb fragment. The fragments are no larger
659 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
660 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
661 * per fragment is queued.
662 */
663 enic_queue_wq_desc_csum_l4(wq, skb,
664 pci_map_single(enic->pdev, skb->data,
665 head_len, PCI_DMA_TODEVICE),
666 head_len,
667 csum_offset,
668 hdr_len,
669 vlan_tag_insert, vlan_tag,
670 eop, loopback);
671
672 if (!eop)
673 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
674 }
675
676 static inline void enic_queue_wq_skb_tso(struct enic *enic,
677 struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
678 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
679 {
680 unsigned int frag_len_left = skb_headlen(skb);
681 unsigned int len_left = skb->len - frag_len_left;
682 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
683 int eop = (len_left == 0);
684 unsigned int len;
685 dma_addr_t dma_addr;
686 unsigned int offset = 0;
687 skb_frag_t *frag;
688
689 /* Preload TCP csum field with IP pseudo hdr calculated
690 * with IP length set to zero. HW will later add in length
691 * to each TCP segment resulting from the TSO.
692 */
693
694 if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
695 ip_hdr(skb)->check = 0;
696 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
697 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
698 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
699 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
700 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
701 }
702
703 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
704 * for the main skb fragment
705 */
706 while (frag_len_left) {
707 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
708 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
709 len, PCI_DMA_TODEVICE);
710 enic_queue_wq_desc_tso(wq, skb,
711 dma_addr,
712 len,
713 mss, hdr_len,
714 vlan_tag_insert, vlan_tag,
715 eop && (len == frag_len_left), loopback);
716 frag_len_left -= len;
717 offset += len;
718 }
719
720 if (eop)
721 return;
722
723 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
724 * for additional data fragments
725 */
726 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
727 len_left -= skb_frag_size(frag);
728 frag_len_left = skb_frag_size(frag);
729 offset = 0;
730
731 while (frag_len_left) {
732 len = min(frag_len_left,
733 (unsigned int)WQ_ENET_MAX_DESC_LEN);
734 dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag,
735 offset, len,
736 DMA_TO_DEVICE);
737 enic_queue_wq_desc_cont(wq, skb,
738 dma_addr,
739 len,
740 (len_left == 0) &&
741 (len == frag_len_left), /* EOP? */
742 loopback);
743 frag_len_left -= len;
744 offset += len;
745 }
746 }
747 }
748
749 static inline void enic_queue_wq_skb(struct enic *enic,
750 struct vnic_wq *wq, struct sk_buff *skb)
751 {
752 unsigned int mss = skb_shinfo(skb)->gso_size;
753 unsigned int vlan_tag = 0;
754 int vlan_tag_insert = 0;
755 int loopback = 0;
756
757 if (vlan_tx_tag_present(skb)) {
758 /* VLAN tag from trunking driver */
759 vlan_tag_insert = 1;
760 vlan_tag = vlan_tx_tag_get(skb);
761 } else if (enic->loop_enable) {
762 vlan_tag = enic->loop_tag;
763 loopback = 1;
764 }
765
766 if (mss)
767 enic_queue_wq_skb_tso(enic, wq, skb, mss,
768 vlan_tag_insert, vlan_tag, loopback);
769 else if (skb->ip_summed == CHECKSUM_PARTIAL)
770 enic_queue_wq_skb_csum_l4(enic, wq, skb,
771 vlan_tag_insert, vlan_tag, loopback);
772 else
773 enic_queue_wq_skb_vlan(enic, wq, skb,
774 vlan_tag_insert, vlan_tag, loopback);
775 }
776
777 /* netif_tx_lock held, process context with BHs disabled, or BH */
778 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
779 struct net_device *netdev)
780 {
781 struct enic *enic = netdev_priv(netdev);
782 struct vnic_wq *wq = &enic->wq[0];
783 unsigned long flags;
784
785 if (skb->len <= 0) {
786 dev_kfree_skb(skb);
787 return NETDEV_TX_OK;
788 }
789
790 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
791 * which is very likely. In the off chance it's going to take
792 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
793 */
794
795 if (skb_shinfo(skb)->gso_size == 0 &&
796 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
797 skb_linearize(skb)) {
798 dev_kfree_skb(skb);
799 return NETDEV_TX_OK;
800 }
801
802 spin_lock_irqsave(&enic->wq_lock[0], flags);
803
804 if (vnic_wq_desc_avail(wq) <
805 skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
806 netif_stop_queue(netdev);
807 /* This is a hard error, log it */
808 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
809 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
810 return NETDEV_TX_BUSY;
811 }
812
813 enic_queue_wq_skb(enic, wq, skb);
814
815 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
816 netif_stop_queue(netdev);
817
818 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
819
820 return NETDEV_TX_OK;
821 }
822
823 /* dev_base_lock rwlock held, nominally process context */
824 static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
825 struct rtnl_link_stats64 *net_stats)
826 {
827 struct enic *enic = netdev_priv(netdev);
828 struct vnic_stats *stats;
829
830 enic_dev_stats_dump(enic, &stats);
831
832 net_stats->tx_packets = stats->tx.tx_frames_ok;
833 net_stats->tx_bytes = stats->tx.tx_bytes_ok;
834 net_stats->tx_errors = stats->tx.tx_errors;
835 net_stats->tx_dropped = stats->tx.tx_drops;
836
837 net_stats->rx_packets = stats->rx.rx_frames_ok;
838 net_stats->rx_bytes = stats->rx.rx_bytes_ok;
839 net_stats->rx_errors = stats->rx.rx_errors;
840 net_stats->multicast = stats->rx.rx_multicast_frames_ok;
841 net_stats->rx_over_errors = enic->rq_truncated_pkts;
842 net_stats->rx_crc_errors = enic->rq_bad_fcs;
843 net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
844
845 return net_stats;
846 }
847
848 void enic_reset_addr_lists(struct enic *enic)
849 {
850 enic->mc_count = 0;
851 enic->uc_count = 0;
852 enic->flags = 0;
853 }
854
855 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
856 {
857 struct enic *enic = netdev_priv(netdev);
858
859 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
860 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
861 return -EADDRNOTAVAIL;
862 } else {
863 if (!is_valid_ether_addr(addr))
864 return -EADDRNOTAVAIL;
865 }
866
867 memcpy(netdev->dev_addr, addr, netdev->addr_len);
868
869 return 0;
870 }
871
872 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
873 {
874 struct enic *enic = netdev_priv(netdev);
875 struct sockaddr *saddr = p;
876 char *addr = saddr->sa_data;
877 int err;
878
879 if (netif_running(enic->netdev)) {
880 err = enic_dev_del_station_addr(enic);
881 if (err)
882 return err;
883 }
884
885 err = enic_set_mac_addr(netdev, addr);
886 if (err)
887 return err;
888
889 if (netif_running(enic->netdev)) {
890 err = enic_dev_add_station_addr(enic);
891 if (err)
892 return err;
893 }
894
895 return err;
896 }
897
898 static int enic_set_mac_address(struct net_device *netdev, void *p)
899 {
900 struct sockaddr *saddr = p;
901 char *addr = saddr->sa_data;
902 struct enic *enic = netdev_priv(netdev);
903 int err;
904
905 err = enic_dev_del_station_addr(enic);
906 if (err)
907 return err;
908
909 err = enic_set_mac_addr(netdev, addr);
910 if (err)
911 return err;
912
913 return enic_dev_add_station_addr(enic);
914 }
915
916 static void enic_update_multicast_addr_list(struct enic *enic)
917 {
918 struct net_device *netdev = enic->netdev;
919 struct netdev_hw_addr *ha;
920 unsigned int mc_count = netdev_mc_count(netdev);
921 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
922 unsigned int i, j;
923
924 if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
925 netdev_warn(netdev, "Registering only %d out of %d "
926 "multicast addresses\n",
927 ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
928 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
929 }
930
931 /* Is there an easier way? Trying to minimize to
932 * calls to add/del multicast addrs. We keep the
933 * addrs from the last call in enic->mc_addr and
934 * look for changes to add/del.
935 */
936
937 i = 0;
938 netdev_for_each_mc_addr(ha, netdev) {
939 if (i == mc_count)
940 break;
941 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
942 }
943
944 for (i = 0; i < enic->mc_count; i++) {
945 for (j = 0; j < mc_count; j++)
946 if (compare_ether_addr(enic->mc_addr[i],
947 mc_addr[j]) == 0)
948 break;
949 if (j == mc_count)
950 enic_dev_del_addr(enic, enic->mc_addr[i]);
951 }
952
953 for (i = 0; i < mc_count; i++) {
954 for (j = 0; j < enic->mc_count; j++)
955 if (compare_ether_addr(mc_addr[i],
956 enic->mc_addr[j]) == 0)
957 break;
958 if (j == enic->mc_count)
959 enic_dev_add_addr(enic, mc_addr[i]);
960 }
961
962 /* Save the list to compare against next time
963 */
964
965 for (i = 0; i < mc_count; i++)
966 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
967
968 enic->mc_count = mc_count;
969 }
970
971 static void enic_update_unicast_addr_list(struct enic *enic)
972 {
973 struct net_device *netdev = enic->netdev;
974 struct netdev_hw_addr *ha;
975 unsigned int uc_count = netdev_uc_count(netdev);
976 u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
977 unsigned int i, j;
978
979 if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
980 netdev_warn(netdev, "Registering only %d out of %d "
981 "unicast addresses\n",
982 ENIC_UNICAST_PERFECT_FILTERS, uc_count);
983 uc_count = ENIC_UNICAST_PERFECT_FILTERS;
984 }
985
986 /* Is there an easier way? Trying to minimize to
987 * calls to add/del unicast addrs. We keep the
988 * addrs from the last call in enic->uc_addr and
989 * look for changes to add/del.
990 */
991
992 i = 0;
993 netdev_for_each_uc_addr(ha, netdev) {
994 if (i == uc_count)
995 break;
996 memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
997 }
998
999 for (i = 0; i < enic->uc_count; i++) {
1000 for (j = 0; j < uc_count; j++)
1001 if (compare_ether_addr(enic->uc_addr[i],
1002 uc_addr[j]) == 0)
1003 break;
1004 if (j == uc_count)
1005 enic_dev_del_addr(enic, enic->uc_addr[i]);
1006 }
1007
1008 for (i = 0; i < uc_count; i++) {
1009 for (j = 0; j < enic->uc_count; j++)
1010 if (compare_ether_addr(uc_addr[i],
1011 enic->uc_addr[j]) == 0)
1012 break;
1013 if (j == enic->uc_count)
1014 enic_dev_add_addr(enic, uc_addr[i]);
1015 }
1016
1017 /* Save the list to compare against next time
1018 */
1019
1020 for (i = 0; i < uc_count; i++)
1021 memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
1022
1023 enic->uc_count = uc_count;
1024 }
1025
1026 /* netif_tx_lock held, BHs disabled */
1027 static void enic_set_rx_mode(struct net_device *netdev)
1028 {
1029 struct enic *enic = netdev_priv(netdev);
1030 int directed = 1;
1031 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1032 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1033 int promisc = (netdev->flags & IFF_PROMISC) ||
1034 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
1035 int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1036 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
1037 unsigned int flags = netdev->flags |
1038 (allmulti ? IFF_ALLMULTI : 0) |
1039 (promisc ? IFF_PROMISC : 0);
1040
1041 if (enic->flags != flags) {
1042 enic->flags = flags;
1043 enic_dev_packet_filter(enic, directed,
1044 multicast, broadcast, promisc, allmulti);
1045 }
1046
1047 if (!promisc) {
1048 enic_update_unicast_addr_list(enic);
1049 if (!allmulti)
1050 enic_update_multicast_addr_list(enic);
1051 }
1052 }
1053
1054 /* netif_tx_lock held, BHs disabled */
1055 static void enic_tx_timeout(struct net_device *netdev)
1056 {
1057 struct enic *enic = netdev_priv(netdev);
1058 schedule_work(&enic->reset);
1059 }
1060
1061 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
1062 {
1063 struct enic *enic = netdev_priv(netdev);
1064 struct enic_port_profile *pp;
1065 int err;
1066
1067 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1068 if (err)
1069 return err;
1070
1071 if (is_valid_ether_addr(mac)) {
1072 memcpy(pp->vf_mac, mac, ETH_ALEN);
1073 return 0;
1074 } else
1075 return -EINVAL;
1076 }
1077
1078 static int enic_set_vf_port(struct net_device *netdev, int vf,
1079 struct nlattr *port[])
1080 {
1081 struct enic *enic = netdev_priv(netdev);
1082 struct enic_port_profile prev_pp;
1083 struct enic_port_profile *pp;
1084 int err = 0, restore_pp = 1;
1085
1086 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1087 if (err)
1088 return err;
1089
1090 if (!port[IFLA_PORT_REQUEST])
1091 return -EOPNOTSUPP;
1092
1093 memcpy(&prev_pp, pp, sizeof(*enic->pp));
1094 memset(pp, 0, sizeof(*enic->pp));
1095
1096 pp->set |= ENIC_SET_REQUEST;
1097 pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1098
1099 if (port[IFLA_PORT_PROFILE]) {
1100 pp->set |= ENIC_SET_NAME;
1101 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
1102 PORT_PROFILE_MAX);
1103 }
1104
1105 if (port[IFLA_PORT_INSTANCE_UUID]) {
1106 pp->set |= ENIC_SET_INSTANCE;
1107 memcpy(pp->instance_uuid,
1108 nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1109 }
1110
1111 if (port[IFLA_PORT_HOST_UUID]) {
1112 pp->set |= ENIC_SET_HOST;
1113 memcpy(pp->host_uuid,
1114 nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1115 }
1116
1117 /* Special case handling: mac came from IFLA_VF_MAC */
1118 if (!is_zero_ether_addr(prev_pp.vf_mac))
1119 memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
1120
1121 if (vf == PORT_SELF_VF && is_zero_ether_addr(netdev->dev_addr))
1122 random_ether_addr(netdev->dev_addr);
1123
1124 err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
1125 if (err) {
1126 if (restore_pp) {
1127 /* Things are still the way they were: Implicit
1128 * DISASSOCIATE failed
1129 */
1130 memcpy(pp, &prev_pp, sizeof(*pp));
1131 } else {
1132 memset(pp, 0, sizeof(*pp));
1133 if (vf == PORT_SELF_VF)
1134 memset(netdev->dev_addr, 0, ETH_ALEN);
1135 }
1136 } else {
1137 /* Set flag to indicate that the port assoc/disassoc
1138 * request has been sent out to fw
1139 */
1140 pp->set |= ENIC_PORT_REQUEST_APPLIED;
1141
1142 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
1143 if (pp->request == PORT_REQUEST_DISASSOCIATE) {
1144 memset(pp->mac_addr, 0, ETH_ALEN);
1145 if (vf == PORT_SELF_VF)
1146 memset(netdev->dev_addr, 0, ETH_ALEN);
1147 }
1148 }
1149
1150 memset(pp->vf_mac, 0, ETH_ALEN);
1151
1152 return err;
1153 }
1154
1155 static int enic_get_vf_port(struct net_device *netdev, int vf,
1156 struct sk_buff *skb)
1157 {
1158 struct enic *enic = netdev_priv(netdev);
1159 u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1160 struct enic_port_profile *pp;
1161 int err;
1162
1163 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1164 if (err)
1165 return err;
1166
1167 if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
1168 return -ENODATA;
1169
1170 err = enic_process_get_pp_request(enic, vf, pp->request, &response);
1171 if (err)
1172 return err;
1173
1174 NLA_PUT_U16(skb, IFLA_PORT_REQUEST, pp->request);
1175 NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
1176 if (pp->set & ENIC_SET_NAME)
1177 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
1178 pp->name);
1179 if (pp->set & ENIC_SET_INSTANCE)
1180 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1181 pp->instance_uuid);
1182 if (pp->set & ENIC_SET_HOST)
1183 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
1184 pp->host_uuid);
1185
1186 return 0;
1187
1188 nla_put_failure:
1189 return -EMSGSIZE;
1190 }
1191
1192 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1193 {
1194 struct enic *enic = vnic_dev_priv(rq->vdev);
1195
1196 if (!buf->os_buf)
1197 return;
1198
1199 pci_unmap_single(enic->pdev, buf->dma_addr,
1200 buf->len, PCI_DMA_FROMDEVICE);
1201 dev_kfree_skb_any(buf->os_buf);
1202 }
1203
1204 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1205 {
1206 struct enic *enic = vnic_dev_priv(rq->vdev);
1207 struct net_device *netdev = enic->netdev;
1208 struct sk_buff *skb;
1209 unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1210 unsigned int os_buf_index = 0;
1211 dma_addr_t dma_addr;
1212
1213 skb = netdev_alloc_skb_ip_align(netdev, len);
1214 if (!skb)
1215 return -ENOMEM;
1216
1217 dma_addr = pci_map_single(enic->pdev, skb->data,
1218 len, PCI_DMA_FROMDEVICE);
1219
1220 enic_queue_rq_desc(rq, skb, os_buf_index,
1221 dma_addr, len);
1222
1223 return 0;
1224 }
1225
1226 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1227 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1228 int skipped, void *opaque)
1229 {
1230 struct enic *enic = vnic_dev_priv(rq->vdev);
1231 struct net_device *netdev = enic->netdev;
1232 struct sk_buff *skb;
1233
1234 u8 type, color, eop, sop, ingress_port, vlan_stripped;
1235 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1236 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1237 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1238 u8 packet_error;
1239 u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1240 u32 rss_hash;
1241
1242 if (skipped)
1243 return;
1244
1245 skb = buf->os_buf;
1246 prefetch(skb->data - NET_IP_ALIGN);
1247 pci_unmap_single(enic->pdev, buf->dma_addr,
1248 buf->len, PCI_DMA_FROMDEVICE);
1249
1250 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1251 &type, &color, &q_number, &completed_index,
1252 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1253 &csum_not_calc, &rss_hash, &bytes_written,
1254 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1255 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1256 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1257 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1258 &fcs_ok);
1259
1260 if (packet_error) {
1261
1262 if (!fcs_ok) {
1263 if (bytes_written > 0)
1264 enic->rq_bad_fcs++;
1265 else if (bytes_written == 0)
1266 enic->rq_truncated_pkts++;
1267 }
1268
1269 dev_kfree_skb_any(skb);
1270
1271 return;
1272 }
1273
1274 if (eop && bytes_written > 0) {
1275
1276 /* Good receive
1277 */
1278
1279 skb_put(skb, bytes_written);
1280 skb->protocol = eth_type_trans(skb, netdev);
1281
1282 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) {
1283 skb->csum = htons(checksum);
1284 skb->ip_summed = CHECKSUM_COMPLETE;
1285 }
1286
1287 skb->dev = netdev;
1288
1289 if (vlan_stripped)
1290 __vlan_hwaccel_put_tag(skb, vlan_tci);
1291
1292 if (netdev->features & NETIF_F_GRO)
1293 napi_gro_receive(&enic->napi[q_number], skb);
1294 else
1295 netif_receive_skb(skb);
1296 } else {
1297
1298 /* Buffer overflow
1299 */
1300
1301 dev_kfree_skb_any(skb);
1302 }
1303 }
1304
1305 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1306 u8 type, u16 q_number, u16 completed_index, void *opaque)
1307 {
1308 struct enic *enic = vnic_dev_priv(vdev);
1309
1310 vnic_rq_service(&enic->rq[q_number], cq_desc,
1311 completed_index, VNIC_RQ_RETURN_DESC,
1312 enic_rq_indicate_buf, opaque);
1313
1314 return 0;
1315 }
1316
1317 static int enic_poll(struct napi_struct *napi, int budget)
1318 {
1319 struct net_device *netdev = napi->dev;
1320 struct enic *enic = netdev_priv(netdev);
1321 unsigned int cq_rq = enic_cq_rq(enic, 0);
1322 unsigned int cq_wq = enic_cq_wq(enic, 0);
1323 unsigned int intr = enic_legacy_io_intr();
1324 unsigned int rq_work_to_do = budget;
1325 unsigned int wq_work_to_do = -1; /* no limit */
1326 unsigned int work_done, rq_work_done, wq_work_done;
1327 int err;
1328
1329 /* Service RQ (first) and WQ
1330 */
1331
1332 rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1333 rq_work_to_do, enic_rq_service, NULL);
1334
1335 wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
1336 wq_work_to_do, enic_wq_service, NULL);
1337
1338 /* Accumulate intr event credits for this polling
1339 * cycle. An intr event is the completion of a
1340 * a WQ or RQ packet.
1341 */
1342
1343 work_done = rq_work_done + wq_work_done;
1344
1345 if (work_done > 0)
1346 vnic_intr_return_credits(&enic->intr[intr],
1347 work_done,
1348 0 /* don't unmask intr */,
1349 0 /* don't reset intr timer */);
1350
1351 err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1352
1353 /* Buffer allocation failed. Stay in polling
1354 * mode so we can try to fill the ring again.
1355 */
1356
1357 if (err)
1358 rq_work_done = rq_work_to_do;
1359
1360 if (rq_work_done < rq_work_to_do) {
1361
1362 /* Some work done, but not enough to stay in polling,
1363 * exit polling
1364 */
1365
1366 napi_complete(napi);
1367 vnic_intr_unmask(&enic->intr[intr]);
1368 }
1369
1370 return rq_work_done;
1371 }
1372
1373 static int enic_poll_msix(struct napi_struct *napi, int budget)
1374 {
1375 struct net_device *netdev = napi->dev;
1376 struct enic *enic = netdev_priv(netdev);
1377 unsigned int rq = (napi - &enic->napi[0]);
1378 unsigned int cq = enic_cq_rq(enic, rq);
1379 unsigned int intr = enic_msix_rq_intr(enic, rq);
1380 unsigned int work_to_do = budget;
1381 unsigned int work_done;
1382 int err;
1383
1384 /* Service RQ
1385 */
1386
1387 work_done = vnic_cq_service(&enic->cq[cq],
1388 work_to_do, enic_rq_service, NULL);
1389
1390 /* Return intr event credits for this polling
1391 * cycle. An intr event is the completion of a
1392 * RQ packet.
1393 */
1394
1395 if (work_done > 0)
1396 vnic_intr_return_credits(&enic->intr[intr],
1397 work_done,
1398 0 /* don't unmask intr */,
1399 0 /* don't reset intr timer */);
1400
1401 err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1402
1403 /* Buffer allocation failed. Stay in polling mode
1404 * so we can try to fill the ring again.
1405 */
1406
1407 if (err)
1408 work_done = work_to_do;
1409
1410 if (work_done < work_to_do) {
1411
1412 /* Some work done, but not enough to stay in polling,
1413 * exit polling
1414 */
1415
1416 napi_complete(napi);
1417 vnic_intr_unmask(&enic->intr[intr]);
1418 }
1419
1420 return work_done;
1421 }
1422
1423 static void enic_notify_timer(unsigned long data)
1424 {
1425 struct enic *enic = (struct enic *)data;
1426
1427 enic_notify_check(enic);
1428
1429 mod_timer(&enic->notify_timer,
1430 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1431 }
1432
1433 static void enic_free_intr(struct enic *enic)
1434 {
1435 struct net_device *netdev = enic->netdev;
1436 unsigned int i;
1437
1438 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1439 case VNIC_DEV_INTR_MODE_INTX:
1440 free_irq(enic->pdev->irq, netdev);
1441 break;
1442 case VNIC_DEV_INTR_MODE_MSI:
1443 free_irq(enic->pdev->irq, enic);
1444 break;
1445 case VNIC_DEV_INTR_MODE_MSIX:
1446 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1447 if (enic->msix[i].requested)
1448 free_irq(enic->msix_entry[i].vector,
1449 enic->msix[i].devid);
1450 break;
1451 default:
1452 break;
1453 }
1454 }
1455
1456 static int enic_request_intr(struct enic *enic)
1457 {
1458 struct net_device *netdev = enic->netdev;
1459 unsigned int i, intr;
1460 int err = 0;
1461
1462 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1463
1464 case VNIC_DEV_INTR_MODE_INTX:
1465
1466 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1467 IRQF_SHARED, netdev->name, netdev);
1468 break;
1469
1470 case VNIC_DEV_INTR_MODE_MSI:
1471
1472 err = request_irq(enic->pdev->irq, enic_isr_msi,
1473 0, netdev->name, enic);
1474 break;
1475
1476 case VNIC_DEV_INTR_MODE_MSIX:
1477
1478 for (i = 0; i < enic->rq_count; i++) {
1479 intr = enic_msix_rq_intr(enic, i);
1480 sprintf(enic->msix[intr].devname,
1481 "%.11s-rx-%d", netdev->name, i);
1482 enic->msix[intr].isr = enic_isr_msix_rq;
1483 enic->msix[intr].devid = &enic->napi[i];
1484 }
1485
1486 for (i = 0; i < enic->wq_count; i++) {
1487 intr = enic_msix_wq_intr(enic, i);
1488 sprintf(enic->msix[intr].devname,
1489 "%.11s-tx-%d", netdev->name, i);
1490 enic->msix[intr].isr = enic_isr_msix_wq;
1491 enic->msix[intr].devid = enic;
1492 }
1493
1494 intr = enic_msix_err_intr(enic);
1495 sprintf(enic->msix[intr].devname,
1496 "%.11s-err", netdev->name);
1497 enic->msix[intr].isr = enic_isr_msix_err;
1498 enic->msix[intr].devid = enic;
1499
1500 intr = enic_msix_notify_intr(enic);
1501 sprintf(enic->msix[intr].devname,
1502 "%.11s-notify", netdev->name);
1503 enic->msix[intr].isr = enic_isr_msix_notify;
1504 enic->msix[intr].devid = enic;
1505
1506 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1507 enic->msix[i].requested = 0;
1508
1509 for (i = 0; i < enic->intr_count; i++) {
1510 err = request_irq(enic->msix_entry[i].vector,
1511 enic->msix[i].isr, 0,
1512 enic->msix[i].devname,
1513 enic->msix[i].devid);
1514 if (err) {
1515 enic_free_intr(enic);
1516 break;
1517 }
1518 enic->msix[i].requested = 1;
1519 }
1520
1521 break;
1522
1523 default:
1524 break;
1525 }
1526
1527 return err;
1528 }
1529
1530 static void enic_synchronize_irqs(struct enic *enic)
1531 {
1532 unsigned int i;
1533
1534 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1535 case VNIC_DEV_INTR_MODE_INTX:
1536 case VNIC_DEV_INTR_MODE_MSI:
1537 synchronize_irq(enic->pdev->irq);
1538 break;
1539 case VNIC_DEV_INTR_MODE_MSIX:
1540 for (i = 0; i < enic->intr_count; i++)
1541 synchronize_irq(enic->msix_entry[i].vector);
1542 break;
1543 default:
1544 break;
1545 }
1546 }
1547
1548 static int enic_dev_notify_set(struct enic *enic)
1549 {
1550 int err;
1551
1552 spin_lock(&enic->devcmd_lock);
1553 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1554 case VNIC_DEV_INTR_MODE_INTX:
1555 err = vnic_dev_notify_set(enic->vdev,
1556 enic_legacy_notify_intr());
1557 break;
1558 case VNIC_DEV_INTR_MODE_MSIX:
1559 err = vnic_dev_notify_set(enic->vdev,
1560 enic_msix_notify_intr(enic));
1561 break;
1562 default:
1563 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1564 break;
1565 }
1566 spin_unlock(&enic->devcmd_lock);
1567
1568 return err;
1569 }
1570
1571 static void enic_notify_timer_start(struct enic *enic)
1572 {
1573 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1574 case VNIC_DEV_INTR_MODE_MSI:
1575 mod_timer(&enic->notify_timer, jiffies);
1576 break;
1577 default:
1578 /* Using intr for notification for INTx/MSI-X */
1579 break;
1580 }
1581 }
1582
1583 /* rtnl lock is held, process context */
1584 static int enic_open(struct net_device *netdev)
1585 {
1586 struct enic *enic = netdev_priv(netdev);
1587 unsigned int i;
1588 int err;
1589
1590 err = enic_request_intr(enic);
1591 if (err) {
1592 netdev_err(netdev, "Unable to request irq.\n");
1593 return err;
1594 }
1595
1596 err = enic_dev_notify_set(enic);
1597 if (err) {
1598 netdev_err(netdev,
1599 "Failed to alloc notify buffer, aborting.\n");
1600 goto err_out_free_intr;
1601 }
1602
1603 for (i = 0; i < enic->rq_count; i++) {
1604 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1605 /* Need at least one buffer on ring to get going */
1606 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1607 netdev_err(netdev, "Unable to alloc receive buffers\n");
1608 err = -ENOMEM;
1609 goto err_out_notify_unset;
1610 }
1611 }
1612
1613 for (i = 0; i < enic->wq_count; i++)
1614 vnic_wq_enable(&enic->wq[i]);
1615 for (i = 0; i < enic->rq_count; i++)
1616 vnic_rq_enable(&enic->rq[i]);
1617
1618 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1619 enic_dev_add_station_addr(enic);
1620
1621 enic_set_rx_mode(netdev);
1622
1623 netif_wake_queue(netdev);
1624
1625 for (i = 0; i < enic->rq_count; i++)
1626 napi_enable(&enic->napi[i]);
1627
1628 enic_dev_enable(enic);
1629
1630 for (i = 0; i < enic->intr_count; i++)
1631 vnic_intr_unmask(&enic->intr[i]);
1632
1633 enic_notify_timer_start(enic);
1634
1635 return 0;
1636
1637 err_out_notify_unset:
1638 enic_dev_notify_unset(enic);
1639 err_out_free_intr:
1640 enic_free_intr(enic);
1641
1642 return err;
1643 }
1644
1645 /* rtnl lock is held, process context */
1646 static int enic_stop(struct net_device *netdev)
1647 {
1648 struct enic *enic = netdev_priv(netdev);
1649 unsigned int i;
1650 int err;
1651
1652 for (i = 0; i < enic->intr_count; i++) {
1653 vnic_intr_mask(&enic->intr[i]);
1654 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1655 }
1656
1657 enic_synchronize_irqs(enic);
1658
1659 del_timer_sync(&enic->notify_timer);
1660
1661 enic_dev_disable(enic);
1662
1663 for (i = 0; i < enic->rq_count; i++)
1664 napi_disable(&enic->napi[i]);
1665
1666 netif_carrier_off(netdev);
1667 netif_tx_disable(netdev);
1668
1669 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1670 enic_dev_del_station_addr(enic);
1671
1672 for (i = 0; i < enic->wq_count; i++) {
1673 err = vnic_wq_disable(&enic->wq[i]);
1674 if (err)
1675 return err;
1676 }
1677 for (i = 0; i < enic->rq_count; i++) {
1678 err = vnic_rq_disable(&enic->rq[i]);
1679 if (err)
1680 return err;
1681 }
1682
1683 enic_dev_notify_unset(enic);
1684 enic_free_intr(enic);
1685
1686 for (i = 0; i < enic->wq_count; i++)
1687 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1688 for (i = 0; i < enic->rq_count; i++)
1689 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1690 for (i = 0; i < enic->cq_count; i++)
1691 vnic_cq_clean(&enic->cq[i]);
1692 for (i = 0; i < enic->intr_count; i++)
1693 vnic_intr_clean(&enic->intr[i]);
1694
1695 return 0;
1696 }
1697
1698 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1699 {
1700 struct enic *enic = netdev_priv(netdev);
1701 int running = netif_running(netdev);
1702
1703 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1704 return -EINVAL;
1705
1706 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
1707 return -EOPNOTSUPP;
1708
1709 if (running)
1710 enic_stop(netdev);
1711
1712 netdev->mtu = new_mtu;
1713
1714 if (netdev->mtu > enic->port_mtu)
1715 netdev_warn(netdev,
1716 "interface MTU (%d) set higher than port MTU (%d)\n",
1717 netdev->mtu, enic->port_mtu);
1718
1719 if (running)
1720 enic_open(netdev);
1721
1722 return 0;
1723 }
1724
1725 static void enic_change_mtu_work(struct work_struct *work)
1726 {
1727 struct enic *enic = container_of(work, struct enic, change_mtu_work);
1728 struct net_device *netdev = enic->netdev;
1729 int new_mtu = vnic_dev_mtu(enic->vdev);
1730 int err;
1731 unsigned int i;
1732
1733 new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
1734
1735 rtnl_lock();
1736
1737 /* Stop RQ */
1738 del_timer_sync(&enic->notify_timer);
1739
1740 for (i = 0; i < enic->rq_count; i++)
1741 napi_disable(&enic->napi[i]);
1742
1743 vnic_intr_mask(&enic->intr[0]);
1744 enic_synchronize_irqs(enic);
1745 err = vnic_rq_disable(&enic->rq[0]);
1746 if (err) {
1747 netdev_err(netdev, "Unable to disable RQ.\n");
1748 return;
1749 }
1750 vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
1751 vnic_cq_clean(&enic->cq[0]);
1752 vnic_intr_clean(&enic->intr[0]);
1753
1754 /* Fill RQ with new_mtu-sized buffers */
1755 netdev->mtu = new_mtu;
1756 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1757 /* Need at least one buffer on ring to get going */
1758 if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
1759 netdev_err(netdev, "Unable to alloc receive buffers.\n");
1760 return;
1761 }
1762
1763 /* Start RQ */
1764 vnic_rq_enable(&enic->rq[0]);
1765 napi_enable(&enic->napi[0]);
1766 vnic_intr_unmask(&enic->intr[0]);
1767 enic_notify_timer_start(enic);
1768
1769 rtnl_unlock();
1770
1771 netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
1772 }
1773
1774 #ifdef CONFIG_NET_POLL_CONTROLLER
1775 static void enic_poll_controller(struct net_device *netdev)
1776 {
1777 struct enic *enic = netdev_priv(netdev);
1778 struct vnic_dev *vdev = enic->vdev;
1779 unsigned int i, intr;
1780
1781 switch (vnic_dev_get_intr_mode(vdev)) {
1782 case VNIC_DEV_INTR_MODE_MSIX:
1783 for (i = 0; i < enic->rq_count; i++) {
1784 intr = enic_msix_rq_intr(enic, i);
1785 enic_isr_msix_rq(enic->msix_entry[intr].vector,
1786 &enic->napi[i]);
1787 }
1788
1789 for (i = 0; i < enic->wq_count; i++) {
1790 intr = enic_msix_wq_intr(enic, i);
1791 enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
1792 }
1793
1794 break;
1795 case VNIC_DEV_INTR_MODE_MSI:
1796 enic_isr_msi(enic->pdev->irq, enic);
1797 break;
1798 case VNIC_DEV_INTR_MODE_INTX:
1799 enic_isr_legacy(enic->pdev->irq, netdev);
1800 break;
1801 default:
1802 break;
1803 }
1804 }
1805 #endif
1806
1807 static int enic_dev_wait(struct vnic_dev *vdev,
1808 int (*start)(struct vnic_dev *, int),
1809 int (*finished)(struct vnic_dev *, int *),
1810 int arg)
1811 {
1812 unsigned long time;
1813 int done;
1814 int err;
1815
1816 BUG_ON(in_interrupt());
1817
1818 err = start(vdev, arg);
1819 if (err)
1820 return err;
1821
1822 /* Wait for func to complete...2 seconds max
1823 */
1824
1825 time = jiffies + (HZ * 2);
1826 do {
1827
1828 err = finished(vdev, &done);
1829 if (err)
1830 return err;
1831
1832 if (done)
1833 return 0;
1834
1835 schedule_timeout_uninterruptible(HZ / 10);
1836
1837 } while (time_after(time, jiffies));
1838
1839 return -ETIMEDOUT;
1840 }
1841
1842 static int enic_dev_open(struct enic *enic)
1843 {
1844 int err;
1845
1846 err = enic_dev_wait(enic->vdev, vnic_dev_open,
1847 vnic_dev_open_done, 0);
1848 if (err)
1849 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1850 err);
1851
1852 return err;
1853 }
1854
1855 static int enic_dev_hang_reset(struct enic *enic)
1856 {
1857 int err;
1858
1859 err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1860 vnic_dev_hang_reset_done, 0);
1861 if (err)
1862 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1863 err);
1864
1865 return err;
1866 }
1867
1868 static int enic_set_rsskey(struct enic *enic)
1869 {
1870 dma_addr_t rss_key_buf_pa;
1871 union vnic_rss_key *rss_key_buf_va = NULL;
1872 union vnic_rss_key rss_key = {
1873 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1874 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1875 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1876 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1877 };
1878 int err;
1879
1880 rss_key_buf_va = pci_alloc_consistent(enic->pdev,
1881 sizeof(union vnic_rss_key), &rss_key_buf_pa);
1882 if (!rss_key_buf_va)
1883 return -ENOMEM;
1884
1885 memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
1886
1887 spin_lock(&enic->devcmd_lock);
1888 err = enic_set_rss_key(enic,
1889 rss_key_buf_pa,
1890 sizeof(union vnic_rss_key));
1891 spin_unlock(&enic->devcmd_lock);
1892
1893 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1894 rss_key_buf_va, rss_key_buf_pa);
1895
1896 return err;
1897 }
1898
1899 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1900 {
1901 dma_addr_t rss_cpu_buf_pa;
1902 union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1903 unsigned int i;
1904 int err;
1905
1906 rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1907 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1908 if (!rss_cpu_buf_va)
1909 return -ENOMEM;
1910
1911 for (i = 0; i < (1 << rss_hash_bits); i++)
1912 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1913
1914 spin_lock(&enic->devcmd_lock);
1915 err = enic_set_rss_cpu(enic,
1916 rss_cpu_buf_pa,
1917 sizeof(union vnic_rss_cpu));
1918 spin_unlock(&enic->devcmd_lock);
1919
1920 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1921 rss_cpu_buf_va, rss_cpu_buf_pa);
1922
1923 return err;
1924 }
1925
1926 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
1927 u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
1928 {
1929 const u8 tso_ipid_split_en = 0;
1930 const u8 ig_vlan_strip_en = 1;
1931 int err;
1932
1933 /* Enable VLAN tag stripping.
1934 */
1935
1936 spin_lock(&enic->devcmd_lock);
1937 err = enic_set_nic_cfg(enic,
1938 rss_default_cpu, rss_hash_type,
1939 rss_hash_bits, rss_base_cpu,
1940 rss_enable, tso_ipid_split_en,
1941 ig_vlan_strip_en);
1942 spin_unlock(&enic->devcmd_lock);
1943
1944 return err;
1945 }
1946
1947 static int enic_set_rss_nic_cfg(struct enic *enic)
1948 {
1949 struct device *dev = enic_get_dev(enic);
1950 const u8 rss_default_cpu = 0;
1951 const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1952 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1953 NIC_CFG_RSS_HASH_TYPE_IPV6 |
1954 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1955 const u8 rss_hash_bits = 7;
1956 const u8 rss_base_cpu = 0;
1957 u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1958
1959 if (rss_enable) {
1960 if (!enic_set_rsskey(enic)) {
1961 if (enic_set_rsscpu(enic, rss_hash_bits)) {
1962 rss_enable = 0;
1963 dev_warn(dev, "RSS disabled, "
1964 "Failed to set RSS cpu indirection table.");
1965 }
1966 } else {
1967 rss_enable = 0;
1968 dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
1969 }
1970 }
1971
1972 return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1973 rss_hash_bits, rss_base_cpu, rss_enable);
1974 }
1975
1976 static void enic_reset(struct work_struct *work)
1977 {
1978 struct enic *enic = container_of(work, struct enic, reset);
1979
1980 if (!netif_running(enic->netdev))
1981 return;
1982
1983 rtnl_lock();
1984
1985 enic_dev_hang_notify(enic);
1986 enic_stop(enic->netdev);
1987 enic_dev_hang_reset(enic);
1988 enic_reset_addr_lists(enic);
1989 enic_init_vnic_resources(enic);
1990 enic_set_rss_nic_cfg(enic);
1991 enic_dev_set_ig_vlan_rewrite_mode(enic);
1992 enic_open(enic->netdev);
1993
1994 rtnl_unlock();
1995 }
1996
1997 static int enic_set_intr_mode(struct enic *enic)
1998 {
1999 unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
2000 unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
2001 unsigned int i;
2002
2003 /* Set interrupt mode (INTx, MSI, MSI-X) depending
2004 * on system capabilities.
2005 *
2006 * Try MSI-X first
2007 *
2008 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2009 * (the second to last INTR is used for WQ/RQ errors)
2010 * (the last INTR is used for notifications)
2011 */
2012
2013 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2014 for (i = 0; i < n + m + 2; i++)
2015 enic->msix_entry[i].entry = i;
2016
2017 /* Use multiple RQs if RSS is enabled
2018 */
2019
2020 if (ENIC_SETTING(enic, RSS) &&
2021 enic->config.intr_mode < 1 &&
2022 enic->rq_count >= n &&
2023 enic->wq_count >= m &&
2024 enic->cq_count >= n + m &&
2025 enic->intr_count >= n + m + 2) {
2026
2027 if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
2028
2029 enic->rq_count = n;
2030 enic->wq_count = m;
2031 enic->cq_count = n + m;
2032 enic->intr_count = n + m + 2;
2033
2034 vnic_dev_set_intr_mode(enic->vdev,
2035 VNIC_DEV_INTR_MODE_MSIX);
2036
2037 return 0;
2038 }
2039 }
2040
2041 if (enic->config.intr_mode < 1 &&
2042 enic->rq_count >= 1 &&
2043 enic->wq_count >= m &&
2044 enic->cq_count >= 1 + m &&
2045 enic->intr_count >= 1 + m + 2) {
2046 if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
2047
2048 enic->rq_count = 1;
2049 enic->wq_count = m;
2050 enic->cq_count = 1 + m;
2051 enic->intr_count = 1 + m + 2;
2052
2053 vnic_dev_set_intr_mode(enic->vdev,
2054 VNIC_DEV_INTR_MODE_MSIX);
2055
2056 return 0;
2057 }
2058 }
2059
2060 /* Next try MSI
2061 *
2062 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2063 */
2064
2065 if (enic->config.intr_mode < 2 &&
2066 enic->rq_count >= 1 &&
2067 enic->wq_count >= 1 &&
2068 enic->cq_count >= 2 &&
2069 enic->intr_count >= 1 &&
2070 !pci_enable_msi(enic->pdev)) {
2071
2072 enic->rq_count = 1;
2073 enic->wq_count = 1;
2074 enic->cq_count = 2;
2075 enic->intr_count = 1;
2076
2077 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2078
2079 return 0;
2080 }
2081
2082 /* Next try INTx
2083 *
2084 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2085 * (the first INTR is used for WQ/RQ)
2086 * (the second INTR is used for WQ/RQ errors)
2087 * (the last INTR is used for notifications)
2088 */
2089
2090 if (enic->config.intr_mode < 3 &&
2091 enic->rq_count >= 1 &&
2092 enic->wq_count >= 1 &&
2093 enic->cq_count >= 2 &&
2094 enic->intr_count >= 3) {
2095
2096 enic->rq_count = 1;
2097 enic->wq_count = 1;
2098 enic->cq_count = 2;
2099 enic->intr_count = 3;
2100
2101 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2102
2103 return 0;
2104 }
2105
2106 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2107
2108 return -EINVAL;
2109 }
2110
2111 static void enic_clear_intr_mode(struct enic *enic)
2112 {
2113 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2114 case VNIC_DEV_INTR_MODE_MSIX:
2115 pci_disable_msix(enic->pdev);
2116 break;
2117 case VNIC_DEV_INTR_MODE_MSI:
2118 pci_disable_msi(enic->pdev);
2119 break;
2120 default:
2121 break;
2122 }
2123
2124 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2125 }
2126
2127 static const struct net_device_ops enic_netdev_dynamic_ops = {
2128 .ndo_open = enic_open,
2129 .ndo_stop = enic_stop,
2130 .ndo_start_xmit = enic_hard_start_xmit,
2131 .ndo_get_stats64 = enic_get_stats,
2132 .ndo_validate_addr = eth_validate_addr,
2133 .ndo_set_rx_mode = enic_set_rx_mode,
2134 .ndo_set_mac_address = enic_set_mac_address_dynamic,
2135 .ndo_change_mtu = enic_change_mtu,
2136 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2137 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2138 .ndo_tx_timeout = enic_tx_timeout,
2139 .ndo_set_vf_port = enic_set_vf_port,
2140 .ndo_get_vf_port = enic_get_vf_port,
2141 .ndo_set_vf_mac = enic_set_vf_mac,
2142 #ifdef CONFIG_NET_POLL_CONTROLLER
2143 .ndo_poll_controller = enic_poll_controller,
2144 #endif
2145 };
2146
2147 static const struct net_device_ops enic_netdev_ops = {
2148 .ndo_open = enic_open,
2149 .ndo_stop = enic_stop,
2150 .ndo_start_xmit = enic_hard_start_xmit,
2151 .ndo_get_stats64 = enic_get_stats,
2152 .ndo_validate_addr = eth_validate_addr,
2153 .ndo_set_mac_address = enic_set_mac_address,
2154 .ndo_set_rx_mode = enic_set_rx_mode,
2155 .ndo_change_mtu = enic_change_mtu,
2156 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2157 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2158 .ndo_tx_timeout = enic_tx_timeout,
2159 .ndo_set_vf_port = enic_set_vf_port,
2160 .ndo_get_vf_port = enic_get_vf_port,
2161 .ndo_set_vf_mac = enic_set_vf_mac,
2162 #ifdef CONFIG_NET_POLL_CONTROLLER
2163 .ndo_poll_controller = enic_poll_controller,
2164 #endif
2165 };
2166
2167 static void enic_dev_deinit(struct enic *enic)
2168 {
2169 unsigned int i;
2170
2171 for (i = 0; i < enic->rq_count; i++)
2172 netif_napi_del(&enic->napi[i]);
2173
2174 enic_free_vnic_resources(enic);
2175 enic_clear_intr_mode(enic);
2176 }
2177
2178 static int enic_dev_init(struct enic *enic)
2179 {
2180 struct device *dev = enic_get_dev(enic);
2181 struct net_device *netdev = enic->netdev;
2182 unsigned int i;
2183 int err;
2184
2185 /* Get interrupt coalesce timer info */
2186 err = enic_dev_intr_coal_timer_info(enic);
2187 if (err) {
2188 dev_warn(dev, "Using default conversion factor for "
2189 "interrupt coalesce timer\n");
2190 vnic_dev_intr_coal_timer_info_default(enic->vdev);
2191 }
2192
2193 /* Get vNIC configuration
2194 */
2195
2196 err = enic_get_vnic_config(enic);
2197 if (err) {
2198 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2199 return err;
2200 }
2201
2202 /* Get available resource counts
2203 */
2204
2205 enic_get_res_counts(enic);
2206
2207 /* Set interrupt mode based on resource counts and system
2208 * capabilities
2209 */
2210
2211 err = enic_set_intr_mode(enic);
2212 if (err) {
2213 dev_err(dev, "Failed to set intr mode based on resource "
2214 "counts and system capabilities, aborting\n");
2215 return err;
2216 }
2217
2218 /* Allocate and configure vNIC resources
2219 */
2220
2221 err = enic_alloc_vnic_resources(enic);
2222 if (err) {
2223 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2224 goto err_out_free_vnic_resources;
2225 }
2226
2227 enic_init_vnic_resources(enic);
2228
2229 err = enic_set_rss_nic_cfg(enic);
2230 if (err) {
2231 dev_err(dev, "Failed to config nic, aborting\n");
2232 goto err_out_free_vnic_resources;
2233 }
2234
2235 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2236 default:
2237 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2238 break;
2239 case VNIC_DEV_INTR_MODE_MSIX:
2240 for (i = 0; i < enic->rq_count; i++)
2241 netif_napi_add(netdev, &enic->napi[i],
2242 enic_poll_msix, 64);
2243 break;
2244 }
2245
2246 return 0;
2247
2248 err_out_free_vnic_resources:
2249 enic_clear_intr_mode(enic);
2250 enic_free_vnic_resources(enic);
2251
2252 return err;
2253 }
2254
2255 static void enic_iounmap(struct enic *enic)
2256 {
2257 unsigned int i;
2258
2259 for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2260 if (enic->bar[i].vaddr)
2261 iounmap(enic->bar[i].vaddr);
2262 }
2263
2264 static int __devinit enic_probe(struct pci_dev *pdev,
2265 const struct pci_device_id *ent)
2266 {
2267 struct device *dev = &pdev->dev;
2268 struct net_device *netdev;
2269 struct enic *enic;
2270 int using_dac = 0;
2271 unsigned int i;
2272 int err;
2273 #ifdef CONFIG_PCI_IOV
2274 int pos = 0;
2275 #endif
2276 int num_pps = 1;
2277
2278 /* Allocate net device structure and initialize. Private
2279 * instance data is initialized to zero.
2280 */
2281
2282 netdev = alloc_etherdev(sizeof(struct enic));
2283 if (!netdev) {
2284 pr_err("Etherdev alloc failed, aborting\n");
2285 return -ENOMEM;
2286 }
2287
2288 pci_set_drvdata(pdev, netdev);
2289
2290 SET_NETDEV_DEV(netdev, &pdev->dev);
2291
2292 enic = netdev_priv(netdev);
2293 enic->netdev = netdev;
2294 enic->pdev = pdev;
2295
2296 /* Setup PCI resources
2297 */
2298
2299 err = pci_enable_device_mem(pdev);
2300 if (err) {
2301 dev_err(dev, "Cannot enable PCI device, aborting\n");
2302 goto err_out_free_netdev;
2303 }
2304
2305 err = pci_request_regions(pdev, DRV_NAME);
2306 if (err) {
2307 dev_err(dev, "Cannot request PCI regions, aborting\n");
2308 goto err_out_disable_device;
2309 }
2310
2311 pci_set_master(pdev);
2312
2313 /* Query PCI controller on system for DMA addressing
2314 * limitation for the device. Try 40-bit first, and
2315 * fail to 32-bit.
2316 */
2317
2318 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2319 if (err) {
2320 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2321 if (err) {
2322 dev_err(dev, "No usable DMA configuration, aborting\n");
2323 goto err_out_release_regions;
2324 }
2325 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2326 if (err) {
2327 dev_err(dev, "Unable to obtain %u-bit DMA "
2328 "for consistent allocations, aborting\n", 32);
2329 goto err_out_release_regions;
2330 }
2331 } else {
2332 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2333 if (err) {
2334 dev_err(dev, "Unable to obtain %u-bit DMA "
2335 "for consistent allocations, aborting\n", 40);
2336 goto err_out_release_regions;
2337 }
2338 using_dac = 1;
2339 }
2340
2341 /* Map vNIC resources from BAR0-5
2342 */
2343
2344 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2345 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2346 continue;
2347 enic->bar[i].len = pci_resource_len(pdev, i);
2348 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2349 if (!enic->bar[i].vaddr) {
2350 dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2351 err = -ENODEV;
2352 goto err_out_iounmap;
2353 }
2354 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2355 }
2356
2357 /* Register vNIC device
2358 */
2359
2360 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2361 ARRAY_SIZE(enic->bar));
2362 if (!enic->vdev) {
2363 dev_err(dev, "vNIC registration failed, aborting\n");
2364 err = -ENODEV;
2365 goto err_out_iounmap;
2366 }
2367
2368 #ifdef CONFIG_PCI_IOV
2369 /* Get number of subvnics */
2370 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2371 if (pos) {
2372 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
2373 &enic->num_vfs);
2374 if (enic->num_vfs) {
2375 err = pci_enable_sriov(pdev, enic->num_vfs);
2376 if (err) {
2377 dev_err(dev, "SRIOV enable failed, aborting."
2378 " pci_enable_sriov() returned %d\n",
2379 err);
2380 goto err_out_vnic_unregister;
2381 }
2382 enic->priv_flags |= ENIC_SRIOV_ENABLED;
2383 num_pps = enic->num_vfs;
2384 }
2385 }
2386 #endif
2387
2388 /* Allocate structure for port profiles */
2389 enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
2390 if (!enic->pp) {
2391 pr_err("port profile alloc failed, aborting\n");
2392 err = -ENOMEM;
2393 goto err_out_disable_sriov_pp;
2394 }
2395
2396 /* Issue device open to get device in known state
2397 */
2398
2399 err = enic_dev_open(enic);
2400 if (err) {
2401 dev_err(dev, "vNIC dev open failed, aborting\n");
2402 goto err_out_disable_sriov;
2403 }
2404
2405 /* Setup devcmd lock
2406 */
2407
2408 spin_lock_init(&enic->devcmd_lock);
2409
2410 /*
2411 * Set ingress vlan rewrite mode before vnic initialization
2412 */
2413
2414 err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2415 if (err) {
2416 dev_err(dev,
2417 "Failed to set ingress vlan rewrite mode, aborting.\n");
2418 goto err_out_dev_close;
2419 }
2420
2421 /* Issue device init to initialize the vnic-to-switch link.
2422 * We'll start with carrier off and wait for link UP
2423 * notification later to turn on carrier. We don't need
2424 * to wait here for the vnic-to-switch link initialization
2425 * to complete; link UP notification is the indication that
2426 * the process is complete.
2427 */
2428
2429 netif_carrier_off(netdev);
2430
2431 /* Do not call dev_init for a dynamic vnic.
2432 * For a dynamic vnic, init_prov_info will be
2433 * called later by an upper layer.
2434 */
2435
2436 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) {
2437 err = vnic_dev_init(enic->vdev, 0);
2438 if (err) {
2439 dev_err(dev, "vNIC dev init failed, aborting\n");
2440 goto err_out_dev_close;
2441 }
2442 }
2443
2444 err = enic_dev_init(enic);
2445 if (err) {
2446 dev_err(dev, "Device initialization failed, aborting\n");
2447 goto err_out_dev_close;
2448 }
2449
2450 /* Setup notification timer, HW reset task, and wq locks
2451 */
2452
2453 init_timer(&enic->notify_timer);
2454 enic->notify_timer.function = enic_notify_timer;
2455 enic->notify_timer.data = (unsigned long)enic;
2456
2457 INIT_WORK(&enic->reset, enic_reset);
2458 INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2459
2460 for (i = 0; i < enic->wq_count; i++)
2461 spin_lock_init(&enic->wq_lock[i]);
2462
2463 /* Register net device
2464 */
2465
2466 enic->port_mtu = enic->config.mtu;
2467 (void)enic_change_mtu(netdev, enic->port_mtu);
2468
2469 #ifdef CONFIG_PCI_IOV
2470 if (enic_is_sriov_vf(enic) && is_zero_ether_addr(enic->mac_addr))
2471 random_ether_addr(enic->mac_addr);
2472 #endif
2473
2474 err = enic_set_mac_addr(netdev, enic->mac_addr);
2475 if (err) {
2476 dev_err(dev, "Invalid MAC address, aborting\n");
2477 goto err_out_dev_deinit;
2478 }
2479
2480 enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2481 enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2482
2483 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
2484 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2485 else
2486 netdev->netdev_ops = &enic_netdev_ops;
2487
2488 netdev->watchdog_timeo = 2 * HZ;
2489 netdev->ethtool_ops = &enic_ethtool_ops;
2490
2491 netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2492 if (ENIC_SETTING(enic, LOOP)) {
2493 netdev->features &= ~NETIF_F_HW_VLAN_TX;
2494 enic->loop_enable = 1;
2495 enic->loop_tag = enic->config.loop_tag;
2496 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2497 }
2498 if (ENIC_SETTING(enic, TXCSUM))
2499 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2500 if (ENIC_SETTING(enic, TSO))
2501 netdev->hw_features |= NETIF_F_TSO |
2502 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2503 if (ENIC_SETTING(enic, RXCSUM))
2504 netdev->hw_features |= NETIF_F_RXCSUM;
2505
2506 netdev->features |= netdev->hw_features;
2507
2508 if (using_dac)
2509 netdev->features |= NETIF_F_HIGHDMA;
2510
2511 netdev->priv_flags |= IFF_UNICAST_FLT;
2512
2513 err = register_netdev(netdev);
2514 if (err) {
2515 dev_err(dev, "Cannot register net device, aborting\n");
2516 goto err_out_dev_deinit;
2517 }
2518
2519 return 0;
2520
2521 err_out_dev_deinit:
2522 enic_dev_deinit(enic);
2523 err_out_dev_close:
2524 vnic_dev_close(enic->vdev);
2525 err_out_disable_sriov:
2526 kfree(enic->pp);
2527 err_out_disable_sriov_pp:
2528 #ifdef CONFIG_PCI_IOV
2529 if (enic_sriov_enabled(enic)) {
2530 pci_disable_sriov(pdev);
2531 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2532 }
2533 err_out_vnic_unregister:
2534 #endif
2535 vnic_dev_unregister(enic->vdev);
2536 err_out_iounmap:
2537 enic_iounmap(enic);
2538 err_out_release_regions:
2539 pci_release_regions(pdev);
2540 err_out_disable_device:
2541 pci_disable_device(pdev);
2542 err_out_free_netdev:
2543 pci_set_drvdata(pdev, NULL);
2544 free_netdev(netdev);
2545
2546 return err;
2547 }
2548
2549 static void __devexit enic_remove(struct pci_dev *pdev)
2550 {
2551 struct net_device *netdev = pci_get_drvdata(pdev);
2552
2553 if (netdev) {
2554 struct enic *enic = netdev_priv(netdev);
2555
2556 cancel_work_sync(&enic->reset);
2557 cancel_work_sync(&enic->change_mtu_work);
2558 unregister_netdev(netdev);
2559 enic_dev_deinit(enic);
2560 vnic_dev_close(enic->vdev);
2561 #ifdef CONFIG_PCI_IOV
2562 if (enic_sriov_enabled(enic)) {
2563 pci_disable_sriov(pdev);
2564 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2565 }
2566 #endif
2567 kfree(enic->pp);
2568 vnic_dev_unregister(enic->vdev);
2569 enic_iounmap(enic);
2570 pci_release_regions(pdev);
2571 pci_disable_device(pdev);
2572 pci_set_drvdata(pdev, NULL);
2573 free_netdev(netdev);
2574 }
2575 }
2576
2577 static struct pci_driver enic_driver = {
2578 .name = DRV_NAME,
2579 .id_table = enic_id_table,
2580 .probe = enic_probe,
2581 .remove = __devexit_p(enic_remove),
2582 };
2583
2584 static int __init enic_init_module(void)
2585 {
2586 pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2587
2588 return pci_register_driver(&enic_driver);
2589 }
2590
2591 static void __exit enic_cleanup_module(void)
2592 {
2593 pci_unregister_driver(&enic_driver);
2594 }
2595
2596 module_init(enic_init_module);
2597 module_exit(enic_cleanup_module);