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Linux 3.4.102
[linux/fpc-iii.git] / drivers / net / ethernet / cisco / enic / enic_main.c
blob77b4e873f91c04fa8f6d3d3853c63513c1ea2af0
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 netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
869
870 return 0;
871 }
872
873 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
874 {
875 struct enic *enic = netdev_priv(netdev);
876 struct sockaddr *saddr = p;
877 char *addr = saddr->sa_data;
878 int err;
879
880 if (netif_running(enic->netdev)) {
881 err = enic_dev_del_station_addr(enic);
882 if (err)
883 return err;
884 }
885
886 err = enic_set_mac_addr(netdev, addr);
887 if (err)
888 return err;
889
890 if (netif_running(enic->netdev)) {
891 err = enic_dev_add_station_addr(enic);
892 if (err)
893 return err;
894 }
895
896 return err;
897 }
898
899 static int enic_set_mac_address(struct net_device *netdev, void *p)
900 {
901 struct sockaddr *saddr = p;
902 char *addr = saddr->sa_data;
903 struct enic *enic = netdev_priv(netdev);
904 int err;
905
906 err = enic_dev_del_station_addr(enic);
907 if (err)
908 return err;
909
910 err = enic_set_mac_addr(netdev, addr);
911 if (err)
912 return err;
913
914 return enic_dev_add_station_addr(enic);
915 }
916
917 static void enic_update_multicast_addr_list(struct enic *enic)
918 {
919 struct net_device *netdev = enic->netdev;
920 struct netdev_hw_addr *ha;
921 unsigned int mc_count = netdev_mc_count(netdev);
922 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
923 unsigned int i, j;
924
925 if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
926 netdev_warn(netdev, "Registering only %d out of %d "
927 "multicast addresses\n",
928 ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
929 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
930 }
931
932 /* Is there an easier way? Trying to minimize to
933 * calls to add/del multicast addrs. We keep the
934 * addrs from the last call in enic->mc_addr and
935 * look for changes to add/del.
936 */
937
938 i = 0;
939 netdev_for_each_mc_addr(ha, netdev) {
940 if (i == mc_count)
941 break;
942 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
943 }
944
945 for (i = 0; i < enic->mc_count; i++) {
946 for (j = 0; j < mc_count; j++)
947 if (compare_ether_addr(enic->mc_addr[i],
948 mc_addr[j]) == 0)
949 break;
950 if (j == mc_count)
951 enic_dev_del_addr(enic, enic->mc_addr[i]);
952 }
953
954 for (i = 0; i < mc_count; i++) {
955 for (j = 0; j < enic->mc_count; j++)
956 if (compare_ether_addr(mc_addr[i],
957 enic->mc_addr[j]) == 0)
958 break;
959 if (j == enic->mc_count)
960 enic_dev_add_addr(enic, mc_addr[i]);
961 }
962
963 /* Save the list to compare against next time
964 */
965
966 for (i = 0; i < mc_count; i++)
967 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
968
969 enic->mc_count = mc_count;
970 }
971
972 static void enic_update_unicast_addr_list(struct enic *enic)
973 {
974 struct net_device *netdev = enic->netdev;
975 struct netdev_hw_addr *ha;
976 unsigned int uc_count = netdev_uc_count(netdev);
977 u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
978 unsigned int i, j;
979
980 if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
981 netdev_warn(netdev, "Registering only %d out of %d "
982 "unicast addresses\n",
983 ENIC_UNICAST_PERFECT_FILTERS, uc_count);
984 uc_count = ENIC_UNICAST_PERFECT_FILTERS;
985 }
986
987 /* Is there an easier way? Trying to minimize to
988 * calls to add/del unicast addrs. We keep the
989 * addrs from the last call in enic->uc_addr and
990 * look for changes to add/del.
991 */
992
993 i = 0;
994 netdev_for_each_uc_addr(ha, netdev) {
995 if (i == uc_count)
996 break;
997 memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
998 }
999
1000 for (i = 0; i < enic->uc_count; i++) {
1001 for (j = 0; j < uc_count; j++)
1002 if (compare_ether_addr(enic->uc_addr[i],
1003 uc_addr[j]) == 0)
1004 break;
1005 if (j == uc_count)
1006 enic_dev_del_addr(enic, enic->uc_addr[i]);
1007 }
1008
1009 for (i = 0; i < uc_count; i++) {
1010 for (j = 0; j < enic->uc_count; j++)
1011 if (compare_ether_addr(uc_addr[i],
1012 enic->uc_addr[j]) == 0)
1013 break;
1014 if (j == enic->uc_count)
1015 enic_dev_add_addr(enic, uc_addr[i]);
1016 }
1017
1018 /* Save the list to compare against next time
1019 */
1020
1021 for (i = 0; i < uc_count; i++)
1022 memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
1023
1024 enic->uc_count = uc_count;
1025 }
1026
1027 /* netif_tx_lock held, BHs disabled */
1028 static void enic_set_rx_mode(struct net_device *netdev)
1029 {
1030 struct enic *enic = netdev_priv(netdev);
1031 int directed = 1;
1032 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1033 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1034 int promisc = (netdev->flags & IFF_PROMISC) ||
1035 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
1036 int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1037 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
1038 unsigned int flags = netdev->flags |
1039 (allmulti ? IFF_ALLMULTI : 0) |
1040 (promisc ? IFF_PROMISC : 0);
1041
1042 if (enic->flags != flags) {
1043 enic->flags = flags;
1044 enic_dev_packet_filter(enic, directed,
1045 multicast, broadcast, promisc, allmulti);
1046 }
1047
1048 if (!promisc) {
1049 enic_update_unicast_addr_list(enic);
1050 if (!allmulti)
1051 enic_update_multicast_addr_list(enic);
1052 }
1053 }
1054
1055 /* netif_tx_lock held, BHs disabled */
1056 static void enic_tx_timeout(struct net_device *netdev)
1057 {
1058 struct enic *enic = netdev_priv(netdev);
1059 schedule_work(&enic->reset);
1060 }
1061
1062 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
1063 {
1064 struct enic *enic = netdev_priv(netdev);
1065 struct enic_port_profile *pp;
1066 int err;
1067
1068 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1069 if (err)
1070 return err;
1071
1072 if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) {
1073 if (vf == PORT_SELF_VF) {
1074 memcpy(pp->vf_mac, mac, ETH_ALEN);
1075 return 0;
1076 } else {
1077 /*
1078 * For sriov vf's set the mac in hw
1079 */
1080 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
1081 vnic_dev_set_mac_addr, mac);
1082 return enic_dev_status_to_errno(err);
1083 }
1084 } else
1085 return -EINVAL;
1086 }
1087
1088 static int enic_set_vf_port(struct net_device *netdev, int vf,
1089 struct nlattr *port[])
1090 {
1091 struct enic *enic = netdev_priv(netdev);
1092 struct enic_port_profile prev_pp;
1093 struct enic_port_profile *pp;
1094 int err = 0, restore_pp = 1;
1095
1096 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1097 if (err)
1098 return err;
1099
1100 if (!port[IFLA_PORT_REQUEST])
1101 return -EOPNOTSUPP;
1102
1103 memcpy(&prev_pp, pp, sizeof(*enic->pp));
1104 memset(pp, 0, sizeof(*enic->pp));
1105
1106 pp->set |= ENIC_SET_REQUEST;
1107 pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1108
1109 if (port[IFLA_PORT_PROFILE]) {
1110 pp->set |= ENIC_SET_NAME;
1111 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
1112 PORT_PROFILE_MAX);
1113 }
1114
1115 if (port[IFLA_PORT_INSTANCE_UUID]) {
1116 pp->set |= ENIC_SET_INSTANCE;
1117 memcpy(pp->instance_uuid,
1118 nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1119 }
1120
1121 if (port[IFLA_PORT_HOST_UUID]) {
1122 pp->set |= ENIC_SET_HOST;
1123 memcpy(pp->host_uuid,
1124 nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1125 }
1126
1127 if (vf == PORT_SELF_VF) {
1128 /* Special case handling: mac came from IFLA_VF_MAC */
1129 if (!is_zero_ether_addr(prev_pp.vf_mac))
1130 memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
1131
1132 if (is_zero_ether_addr(netdev->dev_addr))
1133 eth_hw_addr_random(netdev);
1134 } else {
1135 /* SR-IOV VF: get mac from adapter */
1136 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
1137 vnic_dev_get_mac_addr, pp->mac_addr);
1138 if (err) {
1139 netdev_err(netdev, "Error getting mac for vf %d\n", vf);
1140 memcpy(pp, &prev_pp, sizeof(*pp));
1141 return enic_dev_status_to_errno(err);
1142 }
1143 }
1144
1145 err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
1146 if (err) {
1147 if (restore_pp) {
1148 /* Things are still the way they were: Implicit
1149 * DISASSOCIATE failed
1150 */
1151 memcpy(pp, &prev_pp, sizeof(*pp));
1152 } else {
1153 memset(pp, 0, sizeof(*pp));
1154 if (vf == PORT_SELF_VF)
1155 memset(netdev->dev_addr, 0, ETH_ALEN);
1156 }
1157 } else {
1158 /* Set flag to indicate that the port assoc/disassoc
1159 * request has been sent out to fw
1160 */
1161 pp->set |= ENIC_PORT_REQUEST_APPLIED;
1162
1163 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
1164 if (pp->request == PORT_REQUEST_DISASSOCIATE) {
1165 memset(pp->mac_addr, 0, ETH_ALEN);
1166 if (vf == PORT_SELF_VF)
1167 memset(netdev->dev_addr, 0, ETH_ALEN);
1168 }
1169 }
1170
1171 if (vf == PORT_SELF_VF)
1172 memset(pp->vf_mac, 0, ETH_ALEN);
1173
1174 return err;
1175 }
1176
1177 static int enic_get_vf_port(struct net_device *netdev, int vf,
1178 struct sk_buff *skb)
1179 {
1180 struct enic *enic = netdev_priv(netdev);
1181 u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1182 struct enic_port_profile *pp;
1183 int err;
1184
1185 ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1186 if (err)
1187 return err;
1188
1189 if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
1190 return -ENODATA;
1191
1192 err = enic_process_get_pp_request(enic, vf, pp->request, &response);
1193 if (err)
1194 return err;
1195
1196 NLA_PUT_U16(skb, IFLA_PORT_REQUEST, pp->request);
1197 NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
1198 if (pp->set & ENIC_SET_NAME)
1199 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
1200 pp->name);
1201 if (pp->set & ENIC_SET_INSTANCE)
1202 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1203 pp->instance_uuid);
1204 if (pp->set & ENIC_SET_HOST)
1205 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
1206 pp->host_uuid);
1207
1208 return 0;
1209
1210 nla_put_failure:
1211 return -EMSGSIZE;
1212 }
1213
1214 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1215 {
1216 struct enic *enic = vnic_dev_priv(rq->vdev);
1217
1218 if (!buf->os_buf)
1219 return;
1220
1221 pci_unmap_single(enic->pdev, buf->dma_addr,
1222 buf->len, PCI_DMA_FROMDEVICE);
1223 dev_kfree_skb_any(buf->os_buf);
1224 }
1225
1226 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1227 {
1228 struct enic *enic = vnic_dev_priv(rq->vdev);
1229 struct net_device *netdev = enic->netdev;
1230 struct sk_buff *skb;
1231 unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1232 unsigned int os_buf_index = 0;
1233 dma_addr_t dma_addr;
1234
1235 skb = netdev_alloc_skb_ip_align(netdev, len);
1236 if (!skb)
1237 return -ENOMEM;
1238
1239 dma_addr = pci_map_single(enic->pdev, skb->data,
1240 len, PCI_DMA_FROMDEVICE);
1241
1242 enic_queue_rq_desc(rq, skb, os_buf_index,
1243 dma_addr, len);
1244
1245 return 0;
1246 }
1247
1248 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1249 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1250 int skipped, void *opaque)
1251 {
1252 struct enic *enic = vnic_dev_priv(rq->vdev);
1253 struct net_device *netdev = enic->netdev;
1254 struct sk_buff *skb;
1255
1256 u8 type, color, eop, sop, ingress_port, vlan_stripped;
1257 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1258 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1259 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1260 u8 packet_error;
1261 u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1262 u32 rss_hash;
1263
1264 if (skipped)
1265 return;
1266
1267 skb = buf->os_buf;
1268 prefetch(skb->data - NET_IP_ALIGN);
1269 pci_unmap_single(enic->pdev, buf->dma_addr,
1270 buf->len, PCI_DMA_FROMDEVICE);
1271
1272 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1273 &type, &color, &q_number, &completed_index,
1274 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1275 &csum_not_calc, &rss_hash, &bytes_written,
1276 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1277 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1278 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1279 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1280 &fcs_ok);
1281
1282 if (packet_error) {
1283
1284 if (!fcs_ok) {
1285 if (bytes_written > 0)
1286 enic->rq_bad_fcs++;
1287 else if (bytes_written == 0)
1288 enic->rq_truncated_pkts++;
1289 }
1290
1291 dev_kfree_skb_any(skb);
1292
1293 return;
1294 }
1295
1296 if (eop && bytes_written > 0) {
1297
1298 /* Good receive
1299 */
1300
1301 skb_put(skb, bytes_written);
1302 skb->protocol = eth_type_trans(skb, netdev);
1303
1304 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) {
1305 skb->csum = htons(checksum);
1306 skb->ip_summed = CHECKSUM_COMPLETE;
1307 }
1308
1309 skb->dev = netdev;
1310
1311 if (vlan_stripped)
1312 __vlan_hwaccel_put_tag(skb, vlan_tci);
1313
1314 if (netdev->features & NETIF_F_GRO)
1315 napi_gro_receive(&enic->napi[q_number], skb);
1316 else
1317 netif_receive_skb(skb);
1318 } else {
1319
1320 /* Buffer overflow
1321 */
1322
1323 dev_kfree_skb_any(skb);
1324 }
1325 }
1326
1327 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1328 u8 type, u16 q_number, u16 completed_index, void *opaque)
1329 {
1330 struct enic *enic = vnic_dev_priv(vdev);
1331
1332 vnic_rq_service(&enic->rq[q_number], cq_desc,
1333 completed_index, VNIC_RQ_RETURN_DESC,
1334 enic_rq_indicate_buf, opaque);
1335
1336 return 0;
1337 }
1338
1339 static int enic_poll(struct napi_struct *napi, int budget)
1340 {
1341 struct net_device *netdev = napi->dev;
1342 struct enic *enic = netdev_priv(netdev);
1343 unsigned int cq_rq = enic_cq_rq(enic, 0);
1344 unsigned int cq_wq = enic_cq_wq(enic, 0);
1345 unsigned int intr = enic_legacy_io_intr();
1346 unsigned int rq_work_to_do = budget;
1347 unsigned int wq_work_to_do = -1; /* no limit */
1348 unsigned int work_done, rq_work_done, wq_work_done;
1349 int err;
1350
1351 /* Service RQ (first) and WQ
1352 */
1353
1354 rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1355 rq_work_to_do, enic_rq_service, NULL);
1356
1357 wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
1358 wq_work_to_do, enic_wq_service, NULL);
1359
1360 /* Accumulate intr event credits for this polling
1361 * cycle. An intr event is the completion of a
1362 * a WQ or RQ packet.
1363 */
1364
1365 work_done = rq_work_done + wq_work_done;
1366
1367 if (work_done > 0)
1368 vnic_intr_return_credits(&enic->intr[intr],
1369 work_done,
1370 0 /* don't unmask intr */,
1371 0 /* don't reset intr timer */);
1372
1373 err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1374
1375 /* Buffer allocation failed. Stay in polling
1376 * mode so we can try to fill the ring again.
1377 */
1378
1379 if (err)
1380 rq_work_done = rq_work_to_do;
1381
1382 if (rq_work_done < rq_work_to_do) {
1383
1384 /* Some work done, but not enough to stay in polling,
1385 * exit polling
1386 */
1387
1388 napi_complete(napi);
1389 vnic_intr_unmask(&enic->intr[intr]);
1390 }
1391
1392 return rq_work_done;
1393 }
1394
1395 static int enic_poll_msix(struct napi_struct *napi, int budget)
1396 {
1397 struct net_device *netdev = napi->dev;
1398 struct enic *enic = netdev_priv(netdev);
1399 unsigned int rq = (napi - &enic->napi[0]);
1400 unsigned int cq = enic_cq_rq(enic, rq);
1401 unsigned int intr = enic_msix_rq_intr(enic, rq);
1402 unsigned int work_to_do = budget;
1403 unsigned int work_done;
1404 int err;
1405
1406 /* Service RQ
1407 */
1408
1409 work_done = vnic_cq_service(&enic->cq[cq],
1410 work_to_do, enic_rq_service, NULL);
1411
1412 /* Return intr event credits for this polling
1413 * cycle. An intr event is the completion of a
1414 * RQ packet.
1415 */
1416
1417 if (work_done > 0)
1418 vnic_intr_return_credits(&enic->intr[intr],
1419 work_done,
1420 0 /* don't unmask intr */,
1421 0 /* don't reset intr timer */);
1422
1423 err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1424
1425 /* Buffer allocation failed. Stay in polling mode
1426 * so we can try to fill the ring again.
1427 */
1428
1429 if (err)
1430 work_done = work_to_do;
1431
1432 if (work_done < work_to_do) {
1433
1434 /* Some work done, but not enough to stay in polling,
1435 * exit polling
1436 */
1437
1438 napi_complete(napi);
1439 vnic_intr_unmask(&enic->intr[intr]);
1440 }
1441
1442 return work_done;
1443 }
1444
1445 static void enic_notify_timer(unsigned long data)
1446 {
1447 struct enic *enic = (struct enic *)data;
1448
1449 enic_notify_check(enic);
1450
1451 mod_timer(&enic->notify_timer,
1452 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1453 }
1454
1455 static void enic_free_intr(struct enic *enic)
1456 {
1457 struct net_device *netdev = enic->netdev;
1458 unsigned int i;
1459
1460 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1461 case VNIC_DEV_INTR_MODE_INTX:
1462 free_irq(enic->pdev->irq, netdev);
1463 break;
1464 case VNIC_DEV_INTR_MODE_MSI:
1465 free_irq(enic->pdev->irq, enic);
1466 break;
1467 case VNIC_DEV_INTR_MODE_MSIX:
1468 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1469 if (enic->msix[i].requested)
1470 free_irq(enic->msix_entry[i].vector,
1471 enic->msix[i].devid);
1472 break;
1473 default:
1474 break;
1475 }
1476 }
1477
1478 static int enic_request_intr(struct enic *enic)
1479 {
1480 struct net_device *netdev = enic->netdev;
1481 unsigned int i, intr;
1482 int err = 0;
1483
1484 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1485
1486 case VNIC_DEV_INTR_MODE_INTX:
1487
1488 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1489 IRQF_SHARED, netdev->name, netdev);
1490 break;
1491
1492 case VNIC_DEV_INTR_MODE_MSI:
1493
1494 err = request_irq(enic->pdev->irq, enic_isr_msi,
1495 0, netdev->name, enic);
1496 break;
1497
1498 case VNIC_DEV_INTR_MODE_MSIX:
1499
1500 for (i = 0; i < enic->rq_count; i++) {
1501 intr = enic_msix_rq_intr(enic, i);
1502 sprintf(enic->msix[intr].devname,
1503 "%.11s-rx-%d", netdev->name, i);
1504 enic->msix[intr].isr = enic_isr_msix_rq;
1505 enic->msix[intr].devid = &enic->napi[i];
1506 }
1507
1508 for (i = 0; i < enic->wq_count; i++) {
1509 intr = enic_msix_wq_intr(enic, i);
1510 sprintf(enic->msix[intr].devname,
1511 "%.11s-tx-%d", netdev->name, i);
1512 enic->msix[intr].isr = enic_isr_msix_wq;
1513 enic->msix[intr].devid = enic;
1514 }
1515
1516 intr = enic_msix_err_intr(enic);
1517 sprintf(enic->msix[intr].devname,
1518 "%.11s-err", netdev->name);
1519 enic->msix[intr].isr = enic_isr_msix_err;
1520 enic->msix[intr].devid = enic;
1521
1522 intr = enic_msix_notify_intr(enic);
1523 sprintf(enic->msix[intr].devname,
1524 "%.11s-notify", netdev->name);
1525 enic->msix[intr].isr = enic_isr_msix_notify;
1526 enic->msix[intr].devid = enic;
1527
1528 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1529 enic->msix[i].requested = 0;
1530
1531 for (i = 0; i < enic->intr_count; i++) {
1532 err = request_irq(enic->msix_entry[i].vector,
1533 enic->msix[i].isr, 0,
1534 enic->msix[i].devname,
1535 enic->msix[i].devid);
1536 if (err) {
1537 enic_free_intr(enic);
1538 break;
1539 }
1540 enic->msix[i].requested = 1;
1541 }
1542
1543 break;
1544
1545 default:
1546 break;
1547 }
1548
1549 return err;
1550 }
1551
1552 static void enic_synchronize_irqs(struct enic *enic)
1553 {
1554 unsigned int i;
1555
1556 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1557 case VNIC_DEV_INTR_MODE_INTX:
1558 case VNIC_DEV_INTR_MODE_MSI:
1559 synchronize_irq(enic->pdev->irq);
1560 break;
1561 case VNIC_DEV_INTR_MODE_MSIX:
1562 for (i = 0; i < enic->intr_count; i++)
1563 synchronize_irq(enic->msix_entry[i].vector);
1564 break;
1565 default:
1566 break;
1567 }
1568 }
1569
1570 static int enic_dev_notify_set(struct enic *enic)
1571 {
1572 int err;
1573
1574 spin_lock(&enic->devcmd_lock);
1575 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1576 case VNIC_DEV_INTR_MODE_INTX:
1577 err = vnic_dev_notify_set(enic->vdev,
1578 enic_legacy_notify_intr());
1579 break;
1580 case VNIC_DEV_INTR_MODE_MSIX:
1581 err = vnic_dev_notify_set(enic->vdev,
1582 enic_msix_notify_intr(enic));
1583 break;
1584 default:
1585 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1586 break;
1587 }
1588 spin_unlock(&enic->devcmd_lock);
1589
1590 return err;
1591 }
1592
1593 static void enic_notify_timer_start(struct enic *enic)
1594 {
1595 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1596 case VNIC_DEV_INTR_MODE_MSI:
1597 mod_timer(&enic->notify_timer, jiffies);
1598 break;
1599 default:
1600 /* Using intr for notification for INTx/MSI-X */
1601 break;
1602 }
1603 }
1604
1605 /* rtnl lock is held, process context */
1606 static int enic_open(struct net_device *netdev)
1607 {
1608 struct enic *enic = netdev_priv(netdev);
1609 unsigned int i;
1610 int err;
1611
1612 err = enic_request_intr(enic);
1613 if (err) {
1614 netdev_err(netdev, "Unable to request irq.\n");
1615 return err;
1616 }
1617
1618 err = enic_dev_notify_set(enic);
1619 if (err) {
1620 netdev_err(netdev,
1621 "Failed to alloc notify buffer, aborting.\n");
1622 goto err_out_free_intr;
1623 }
1624
1625 for (i = 0; i < enic->rq_count; i++) {
1626 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1627 /* Need at least one buffer on ring to get going */
1628 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1629 netdev_err(netdev, "Unable to alloc receive buffers\n");
1630 err = -ENOMEM;
1631 goto err_out_notify_unset;
1632 }
1633 }
1634
1635 for (i = 0; i < enic->wq_count; i++)
1636 vnic_wq_enable(&enic->wq[i]);
1637 for (i = 0; i < enic->rq_count; i++)
1638 vnic_rq_enable(&enic->rq[i]);
1639
1640 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1641 enic_dev_add_station_addr(enic);
1642
1643 enic_set_rx_mode(netdev);
1644
1645 netif_wake_queue(netdev);
1646
1647 for (i = 0; i < enic->rq_count; i++)
1648 napi_enable(&enic->napi[i]);
1649
1650 enic_dev_enable(enic);
1651
1652 for (i = 0; i < enic->intr_count; i++)
1653 vnic_intr_unmask(&enic->intr[i]);
1654
1655 enic_notify_timer_start(enic);
1656
1657 return 0;
1658
1659 err_out_notify_unset:
1660 enic_dev_notify_unset(enic);
1661 err_out_free_intr:
1662 enic_free_intr(enic);
1663
1664 return err;
1665 }
1666
1667 /* rtnl lock is held, process context */
1668 static int enic_stop(struct net_device *netdev)
1669 {
1670 struct enic *enic = netdev_priv(netdev);
1671 unsigned int i;
1672 int err;
1673
1674 for (i = 0; i < enic->intr_count; i++) {
1675 vnic_intr_mask(&enic->intr[i]);
1676 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1677 }
1678
1679 enic_synchronize_irqs(enic);
1680
1681 del_timer_sync(&enic->notify_timer);
1682
1683 enic_dev_disable(enic);
1684
1685 for (i = 0; i < enic->rq_count; i++)
1686 napi_disable(&enic->napi[i]);
1687
1688 netif_carrier_off(netdev);
1689 netif_tx_disable(netdev);
1690
1691 if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1692 enic_dev_del_station_addr(enic);
1693
1694 for (i = 0; i < enic->wq_count; i++) {
1695 err = vnic_wq_disable(&enic->wq[i]);
1696 if (err)
1697 return err;
1698 }
1699 for (i = 0; i < enic->rq_count; i++) {
1700 err = vnic_rq_disable(&enic->rq[i]);
1701 if (err)
1702 return err;
1703 }
1704
1705 enic_dev_notify_unset(enic);
1706 enic_free_intr(enic);
1707
1708 for (i = 0; i < enic->wq_count; i++)
1709 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1710 for (i = 0; i < enic->rq_count; i++)
1711 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1712 for (i = 0; i < enic->cq_count; i++)
1713 vnic_cq_clean(&enic->cq[i]);
1714 for (i = 0; i < enic->intr_count; i++)
1715 vnic_intr_clean(&enic->intr[i]);
1716
1717 return 0;
1718 }
1719
1720 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1721 {
1722 struct enic *enic = netdev_priv(netdev);
1723 int running = netif_running(netdev);
1724
1725 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1726 return -EINVAL;
1727
1728 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
1729 return -EOPNOTSUPP;
1730
1731 if (running)
1732 enic_stop(netdev);
1733
1734 netdev->mtu = new_mtu;
1735
1736 if (netdev->mtu > enic->port_mtu)
1737 netdev_warn(netdev,
1738 "interface MTU (%d) set higher than port MTU (%d)\n",
1739 netdev->mtu, enic->port_mtu);
1740
1741 if (running)
1742 enic_open(netdev);
1743
1744 return 0;
1745 }
1746
1747 static void enic_change_mtu_work(struct work_struct *work)
1748 {
1749 struct enic *enic = container_of(work, struct enic, change_mtu_work);
1750 struct net_device *netdev = enic->netdev;
1751 int new_mtu = vnic_dev_mtu(enic->vdev);
1752 int err;
1753 unsigned int i;
1754
1755 new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
1756
1757 rtnl_lock();
1758
1759 /* Stop RQ */
1760 del_timer_sync(&enic->notify_timer);
1761
1762 for (i = 0; i < enic->rq_count; i++)
1763 napi_disable(&enic->napi[i]);
1764
1765 vnic_intr_mask(&enic->intr[0]);
1766 enic_synchronize_irqs(enic);
1767 err = vnic_rq_disable(&enic->rq[0]);
1768 if (err) {
1769 netdev_err(netdev, "Unable to disable RQ.\n");
1770 return;
1771 }
1772 vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
1773 vnic_cq_clean(&enic->cq[0]);
1774 vnic_intr_clean(&enic->intr[0]);
1775
1776 /* Fill RQ with new_mtu-sized buffers */
1777 netdev->mtu = new_mtu;
1778 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1779 /* Need at least one buffer on ring to get going */
1780 if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
1781 netdev_err(netdev, "Unable to alloc receive buffers.\n");
1782 return;
1783 }
1784
1785 /* Start RQ */
1786 vnic_rq_enable(&enic->rq[0]);
1787 napi_enable(&enic->napi[0]);
1788 vnic_intr_unmask(&enic->intr[0]);
1789 enic_notify_timer_start(enic);
1790
1791 rtnl_unlock();
1792
1793 netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
1794 }
1795
1796 #ifdef CONFIG_NET_POLL_CONTROLLER
1797 static void enic_poll_controller(struct net_device *netdev)
1798 {
1799 struct enic *enic = netdev_priv(netdev);
1800 struct vnic_dev *vdev = enic->vdev;
1801 unsigned int i, intr;
1802
1803 switch (vnic_dev_get_intr_mode(vdev)) {
1804 case VNIC_DEV_INTR_MODE_MSIX:
1805 for (i = 0; i < enic->rq_count; i++) {
1806 intr = enic_msix_rq_intr(enic, i);
1807 enic_isr_msix_rq(enic->msix_entry[intr].vector,
1808 &enic->napi[i]);
1809 }
1810
1811 for (i = 0; i < enic->wq_count; i++) {
1812 intr = enic_msix_wq_intr(enic, i);
1813 enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
1814 }
1815
1816 break;
1817 case VNIC_DEV_INTR_MODE_MSI:
1818 enic_isr_msi(enic->pdev->irq, enic);
1819 break;
1820 case VNIC_DEV_INTR_MODE_INTX:
1821 enic_isr_legacy(enic->pdev->irq, netdev);
1822 break;
1823 default:
1824 break;
1825 }
1826 }
1827 #endif
1828
1829 static int enic_dev_wait(struct vnic_dev *vdev,
1830 int (*start)(struct vnic_dev *, int),
1831 int (*finished)(struct vnic_dev *, int *),
1832 int arg)
1833 {
1834 unsigned long time;
1835 int done;
1836 int err;
1837
1838 BUG_ON(in_interrupt());
1839
1840 err = start(vdev, arg);
1841 if (err)
1842 return err;
1843
1844 /* Wait for func to complete...2 seconds max
1845 */
1846
1847 time = jiffies + (HZ * 2);
1848 do {
1849
1850 err = finished(vdev, &done);
1851 if (err)
1852 return err;
1853
1854 if (done)
1855 return 0;
1856
1857 schedule_timeout_uninterruptible(HZ / 10);
1858
1859 } while (time_after(time, jiffies));
1860
1861 return -ETIMEDOUT;
1862 }
1863
1864 static int enic_dev_open(struct enic *enic)
1865 {
1866 int err;
1867
1868 err = enic_dev_wait(enic->vdev, vnic_dev_open,
1869 vnic_dev_open_done, 0);
1870 if (err)
1871 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1872 err);
1873
1874 return err;
1875 }
1876
1877 static int enic_dev_hang_reset(struct enic *enic)
1878 {
1879 int err;
1880
1881 err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1882 vnic_dev_hang_reset_done, 0);
1883 if (err)
1884 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1885 err);
1886
1887 return err;
1888 }
1889
1890 static int enic_set_rsskey(struct enic *enic)
1891 {
1892 dma_addr_t rss_key_buf_pa;
1893 union vnic_rss_key *rss_key_buf_va = NULL;
1894 union vnic_rss_key rss_key = {
1895 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1896 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1897 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1898 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1899 };
1900 int err;
1901
1902 rss_key_buf_va = pci_alloc_consistent(enic->pdev,
1903 sizeof(union vnic_rss_key), &rss_key_buf_pa);
1904 if (!rss_key_buf_va)
1905 return -ENOMEM;
1906
1907 memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
1908
1909 spin_lock(&enic->devcmd_lock);
1910 err = enic_set_rss_key(enic,
1911 rss_key_buf_pa,
1912 sizeof(union vnic_rss_key));
1913 spin_unlock(&enic->devcmd_lock);
1914
1915 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1916 rss_key_buf_va, rss_key_buf_pa);
1917
1918 return err;
1919 }
1920
1921 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1922 {
1923 dma_addr_t rss_cpu_buf_pa;
1924 union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1925 unsigned int i;
1926 int err;
1927
1928 rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1929 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1930 if (!rss_cpu_buf_va)
1931 return -ENOMEM;
1932
1933 for (i = 0; i < (1 << rss_hash_bits); i++)
1934 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1935
1936 spin_lock(&enic->devcmd_lock);
1937 err = enic_set_rss_cpu(enic,
1938 rss_cpu_buf_pa,
1939 sizeof(union vnic_rss_cpu));
1940 spin_unlock(&enic->devcmd_lock);
1941
1942 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1943 rss_cpu_buf_va, rss_cpu_buf_pa);
1944
1945 return err;
1946 }
1947
1948 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
1949 u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
1950 {
1951 const u8 tso_ipid_split_en = 0;
1952 const u8 ig_vlan_strip_en = 1;
1953 int err;
1954
1955 /* Enable VLAN tag stripping.
1956 */
1957
1958 spin_lock(&enic->devcmd_lock);
1959 err = enic_set_nic_cfg(enic,
1960 rss_default_cpu, rss_hash_type,
1961 rss_hash_bits, rss_base_cpu,
1962 rss_enable, tso_ipid_split_en,
1963 ig_vlan_strip_en);
1964 spin_unlock(&enic->devcmd_lock);
1965
1966 return err;
1967 }
1968
1969 static int enic_set_rss_nic_cfg(struct enic *enic)
1970 {
1971 struct device *dev = enic_get_dev(enic);
1972 const u8 rss_default_cpu = 0;
1973 const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1974 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1975 NIC_CFG_RSS_HASH_TYPE_IPV6 |
1976 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1977 const u8 rss_hash_bits = 7;
1978 const u8 rss_base_cpu = 0;
1979 u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1980
1981 if (rss_enable) {
1982 if (!enic_set_rsskey(enic)) {
1983 if (enic_set_rsscpu(enic, rss_hash_bits)) {
1984 rss_enable = 0;
1985 dev_warn(dev, "RSS disabled, "
1986 "Failed to set RSS cpu indirection table.");
1987 }
1988 } else {
1989 rss_enable = 0;
1990 dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
1991 }
1992 }
1993
1994 return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1995 rss_hash_bits, rss_base_cpu, rss_enable);
1996 }
1997
1998 static void enic_reset(struct work_struct *work)
1999 {
2000 struct enic *enic = container_of(work, struct enic, reset);
2001
2002 if (!netif_running(enic->netdev))
2003 return;
2004
2005 rtnl_lock();
2006
2007 enic_dev_hang_notify(enic);
2008 enic_stop(enic->netdev);
2009 enic_dev_hang_reset(enic);
2010 enic_reset_addr_lists(enic);
2011 enic_init_vnic_resources(enic);
2012 enic_set_rss_nic_cfg(enic);
2013 enic_dev_set_ig_vlan_rewrite_mode(enic);
2014 enic_open(enic->netdev);
2015
2016 rtnl_unlock();
2017 }
2018
2019 static int enic_set_intr_mode(struct enic *enic)
2020 {
2021 unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
2022 unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
2023 unsigned int i;
2024
2025 /* Set interrupt mode (INTx, MSI, MSI-X) depending
2026 * on system capabilities.
2027 *
2028 * Try MSI-X first
2029 *
2030 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2031 * (the second to last INTR is used for WQ/RQ errors)
2032 * (the last INTR is used for notifications)
2033 */
2034
2035 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2036 for (i = 0; i < n + m + 2; i++)
2037 enic->msix_entry[i].entry = i;
2038
2039 /* Use multiple RQs if RSS is enabled
2040 */
2041
2042 if (ENIC_SETTING(enic, RSS) &&
2043 enic->config.intr_mode < 1 &&
2044 enic->rq_count >= n &&
2045 enic->wq_count >= m &&
2046 enic->cq_count >= n + m &&
2047 enic->intr_count >= n + m + 2) {
2048
2049 if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
2050
2051 enic->rq_count = n;
2052 enic->wq_count = m;
2053 enic->cq_count = n + m;
2054 enic->intr_count = n + m + 2;
2055
2056 vnic_dev_set_intr_mode(enic->vdev,
2057 VNIC_DEV_INTR_MODE_MSIX);
2058
2059 return 0;
2060 }
2061 }
2062
2063 if (enic->config.intr_mode < 1 &&
2064 enic->rq_count >= 1 &&
2065 enic->wq_count >= m &&
2066 enic->cq_count >= 1 + m &&
2067 enic->intr_count >= 1 + m + 2) {
2068 if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
2069
2070 enic->rq_count = 1;
2071 enic->wq_count = m;
2072 enic->cq_count = 1 + m;
2073 enic->intr_count = 1 + m + 2;
2074
2075 vnic_dev_set_intr_mode(enic->vdev,
2076 VNIC_DEV_INTR_MODE_MSIX);
2077
2078 return 0;
2079 }
2080 }
2081
2082 /* Next try MSI
2083 *
2084 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2085 */
2086
2087 if (enic->config.intr_mode < 2 &&
2088 enic->rq_count >= 1 &&
2089 enic->wq_count >= 1 &&
2090 enic->cq_count >= 2 &&
2091 enic->intr_count >= 1 &&
2092 !pci_enable_msi(enic->pdev)) {
2093
2094 enic->rq_count = 1;
2095 enic->wq_count = 1;
2096 enic->cq_count = 2;
2097 enic->intr_count = 1;
2098
2099 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2100
2101 return 0;
2102 }
2103
2104 /* Next try INTx
2105 *
2106 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2107 * (the first INTR is used for WQ/RQ)
2108 * (the second INTR is used for WQ/RQ errors)
2109 * (the last INTR is used for notifications)
2110 */
2111
2112 if (enic->config.intr_mode < 3 &&
2113 enic->rq_count >= 1 &&
2114 enic->wq_count >= 1 &&
2115 enic->cq_count >= 2 &&
2116 enic->intr_count >= 3) {
2117
2118 enic->rq_count = 1;
2119 enic->wq_count = 1;
2120 enic->cq_count = 2;
2121 enic->intr_count = 3;
2122
2123 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2124
2125 return 0;
2126 }
2127
2128 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2129
2130 return -EINVAL;
2131 }
2132
2133 static void enic_clear_intr_mode(struct enic *enic)
2134 {
2135 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2136 case VNIC_DEV_INTR_MODE_MSIX:
2137 pci_disable_msix(enic->pdev);
2138 break;
2139 case VNIC_DEV_INTR_MODE_MSI:
2140 pci_disable_msi(enic->pdev);
2141 break;
2142 default:
2143 break;
2144 }
2145
2146 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2147 }
2148
2149 static const struct net_device_ops enic_netdev_dynamic_ops = {
2150 .ndo_open = enic_open,
2151 .ndo_stop = enic_stop,
2152 .ndo_start_xmit = enic_hard_start_xmit,
2153 .ndo_get_stats64 = enic_get_stats,
2154 .ndo_validate_addr = eth_validate_addr,
2155 .ndo_set_rx_mode = enic_set_rx_mode,
2156 .ndo_set_mac_address = enic_set_mac_address_dynamic,
2157 .ndo_change_mtu = enic_change_mtu,
2158 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2159 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2160 .ndo_tx_timeout = enic_tx_timeout,
2161 .ndo_set_vf_port = enic_set_vf_port,
2162 .ndo_get_vf_port = enic_get_vf_port,
2163 .ndo_set_vf_mac = enic_set_vf_mac,
2164 #ifdef CONFIG_NET_POLL_CONTROLLER
2165 .ndo_poll_controller = enic_poll_controller,
2166 #endif
2167 };
2168
2169 static const struct net_device_ops enic_netdev_ops = {
2170 .ndo_open = enic_open,
2171 .ndo_stop = enic_stop,
2172 .ndo_start_xmit = enic_hard_start_xmit,
2173 .ndo_get_stats64 = enic_get_stats,
2174 .ndo_validate_addr = eth_validate_addr,
2175 .ndo_set_mac_address = enic_set_mac_address,
2176 .ndo_set_rx_mode = enic_set_rx_mode,
2177 .ndo_change_mtu = enic_change_mtu,
2178 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2179 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2180 .ndo_tx_timeout = enic_tx_timeout,
2181 .ndo_set_vf_port = enic_set_vf_port,
2182 .ndo_get_vf_port = enic_get_vf_port,
2183 .ndo_set_vf_mac = enic_set_vf_mac,
2184 #ifdef CONFIG_NET_POLL_CONTROLLER
2185 .ndo_poll_controller = enic_poll_controller,
2186 #endif
2187 };
2188
2189 static void enic_dev_deinit(struct enic *enic)
2190 {
2191 unsigned int i;
2192
2193 for (i = 0; i < enic->rq_count; i++)
2194 netif_napi_del(&enic->napi[i]);
2195
2196 enic_free_vnic_resources(enic);
2197 enic_clear_intr_mode(enic);
2198 }
2199
2200 static int enic_dev_init(struct enic *enic)
2201 {
2202 struct device *dev = enic_get_dev(enic);
2203 struct net_device *netdev = enic->netdev;
2204 unsigned int i;
2205 int err;
2206
2207 /* Get interrupt coalesce timer info */
2208 err = enic_dev_intr_coal_timer_info(enic);
2209 if (err) {
2210 dev_warn(dev, "Using default conversion factor for "
2211 "interrupt coalesce timer\n");
2212 vnic_dev_intr_coal_timer_info_default(enic->vdev);
2213 }
2214
2215 /* Get vNIC configuration
2216 */
2217
2218 err = enic_get_vnic_config(enic);
2219 if (err) {
2220 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2221 return err;
2222 }
2223
2224 /* Get available resource counts
2225 */
2226
2227 enic_get_res_counts(enic);
2228
2229 /* Set interrupt mode based on resource counts and system
2230 * capabilities
2231 */
2232
2233 err = enic_set_intr_mode(enic);
2234 if (err) {
2235 dev_err(dev, "Failed to set intr mode based on resource "
2236 "counts and system capabilities, aborting\n");
2237 return err;
2238 }
2239
2240 /* Allocate and configure vNIC resources
2241 */
2242
2243 err = enic_alloc_vnic_resources(enic);
2244 if (err) {
2245 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2246 goto err_out_free_vnic_resources;
2247 }
2248
2249 enic_init_vnic_resources(enic);
2250
2251 err = enic_set_rss_nic_cfg(enic);
2252 if (err) {
2253 dev_err(dev, "Failed to config nic, aborting\n");
2254 goto err_out_free_vnic_resources;
2255 }
2256
2257 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2258 default:
2259 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2260 break;
2261 case VNIC_DEV_INTR_MODE_MSIX:
2262 for (i = 0; i < enic->rq_count; i++)
2263 netif_napi_add(netdev, &enic->napi[i],
2264 enic_poll_msix, 64);
2265 break;
2266 }
2267
2268 return 0;
2269
2270 err_out_free_vnic_resources:
2271 enic_clear_intr_mode(enic);
2272 enic_free_vnic_resources(enic);
2273
2274 return err;
2275 }
2276
2277 static void enic_iounmap(struct enic *enic)
2278 {
2279 unsigned int i;
2280
2281 for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2282 if (enic->bar[i].vaddr)
2283 iounmap(enic->bar[i].vaddr);
2284 }
2285
2286 static int __devinit enic_probe(struct pci_dev *pdev,
2287 const struct pci_device_id *ent)
2288 {
2289 struct device *dev = &pdev->dev;
2290 struct net_device *netdev;
2291 struct enic *enic;
2292 int using_dac = 0;
2293 unsigned int i;
2294 int err;
2295 #ifdef CONFIG_PCI_IOV
2296 int pos = 0;
2297 #endif
2298 int num_pps = 1;
2299
2300 /* Allocate net device structure and initialize. Private
2301 * instance data is initialized to zero.
2302 */
2303
2304 netdev = alloc_etherdev(sizeof(struct enic));
2305 if (!netdev)
2306 return -ENOMEM;
2307
2308 pci_set_drvdata(pdev, netdev);
2309
2310 SET_NETDEV_DEV(netdev, &pdev->dev);
2311
2312 enic = netdev_priv(netdev);
2313 enic->netdev = netdev;
2314 enic->pdev = pdev;
2315
2316 /* Setup PCI resources
2317 */
2318
2319 err = pci_enable_device_mem(pdev);
2320 if (err) {
2321 dev_err(dev, "Cannot enable PCI device, aborting\n");
2322 goto err_out_free_netdev;
2323 }
2324
2325 err = pci_request_regions(pdev, DRV_NAME);
2326 if (err) {
2327 dev_err(dev, "Cannot request PCI regions, aborting\n");
2328 goto err_out_disable_device;
2329 }
2330
2331 pci_set_master(pdev);
2332
2333 /* Query PCI controller on system for DMA addressing
2334 * limitation for the device. Try 40-bit first, and
2335 * fail to 32-bit.
2336 */
2337
2338 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2339 if (err) {
2340 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2341 if (err) {
2342 dev_err(dev, "No usable DMA configuration, aborting\n");
2343 goto err_out_release_regions;
2344 }
2345 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2346 if (err) {
2347 dev_err(dev, "Unable to obtain %u-bit DMA "
2348 "for consistent allocations, aborting\n", 32);
2349 goto err_out_release_regions;
2350 }
2351 } else {
2352 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2353 if (err) {
2354 dev_err(dev, "Unable to obtain %u-bit DMA "
2355 "for consistent allocations, aborting\n", 40);
2356 goto err_out_release_regions;
2357 }
2358 using_dac = 1;
2359 }
2360
2361 /* Map vNIC resources from BAR0-5
2362 */
2363
2364 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2365 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2366 continue;
2367 enic->bar[i].len = pci_resource_len(pdev, i);
2368 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2369 if (!enic->bar[i].vaddr) {
2370 dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2371 err = -ENODEV;
2372 goto err_out_iounmap;
2373 }
2374 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2375 }
2376
2377 /* Register vNIC device
2378 */
2379
2380 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2381 ARRAY_SIZE(enic->bar));
2382 if (!enic->vdev) {
2383 dev_err(dev, "vNIC registration failed, aborting\n");
2384 err = -ENODEV;
2385 goto err_out_iounmap;
2386 }
2387
2388 #ifdef CONFIG_PCI_IOV
2389 /* Get number of subvnics */
2390 pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2391 if (pos) {
2392 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
2393 &enic->num_vfs);
2394 if (enic->num_vfs) {
2395 err = pci_enable_sriov(pdev, enic->num_vfs);
2396 if (err) {
2397 dev_err(dev, "SRIOV enable failed, aborting."
2398 " pci_enable_sriov() returned %d\n",
2399 err);
2400 goto err_out_vnic_unregister;
2401 }
2402 enic->priv_flags |= ENIC_SRIOV_ENABLED;
2403 num_pps = enic->num_vfs;
2404 }
2405 }
2406 #endif
2407
2408 /* Allocate structure for port profiles */
2409 enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
2410 if (!enic->pp) {
2411 err = -ENOMEM;
2412 goto err_out_disable_sriov_pp;
2413 }
2414
2415 /* Issue device open to get device in known state
2416 */
2417
2418 err = enic_dev_open(enic);
2419 if (err) {
2420 dev_err(dev, "vNIC dev open failed, aborting\n");
2421 goto err_out_disable_sriov;
2422 }
2423
2424 /* Setup devcmd lock
2425 */
2426
2427 spin_lock_init(&enic->devcmd_lock);
2428
2429 /*
2430 * Set ingress vlan rewrite mode before vnic initialization
2431 */
2432
2433 err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2434 if (err) {
2435 dev_err(dev,
2436 "Failed to set ingress vlan rewrite mode, aborting.\n");
2437 goto err_out_dev_close;
2438 }
2439
2440 /* Issue device init to initialize the vnic-to-switch link.
2441 * We'll start with carrier off and wait for link UP
2442 * notification later to turn on carrier. We don't need
2443 * to wait here for the vnic-to-switch link initialization
2444 * to complete; link UP notification is the indication that
2445 * the process is complete.
2446 */
2447
2448 netif_carrier_off(netdev);
2449
2450 /* Do not call dev_init for a dynamic vnic.
2451 * For a dynamic vnic, init_prov_info will be
2452 * called later by an upper layer.
2453 */
2454
2455 if (!enic_is_dynamic(enic)) {
2456 err = vnic_dev_init(enic->vdev, 0);
2457 if (err) {
2458 dev_err(dev, "vNIC dev init failed, aborting\n");
2459 goto err_out_dev_close;
2460 }
2461 }
2462
2463 err = enic_dev_init(enic);
2464 if (err) {
2465 dev_err(dev, "Device initialization failed, aborting\n");
2466 goto err_out_dev_close;
2467 }
2468
2469 /* Setup notification timer, HW reset task, and wq locks
2470 */
2471
2472 init_timer(&enic->notify_timer);
2473 enic->notify_timer.function = enic_notify_timer;
2474 enic->notify_timer.data = (unsigned long)enic;
2475
2476 INIT_WORK(&enic->reset, enic_reset);
2477 INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2478
2479 for (i = 0; i < enic->wq_count; i++)
2480 spin_lock_init(&enic->wq_lock[i]);
2481
2482 /* Register net device
2483 */
2484
2485 enic->port_mtu = enic->config.mtu;
2486 (void)enic_change_mtu(netdev, enic->port_mtu);
2487
2488 err = enic_set_mac_addr(netdev, enic->mac_addr);
2489 if (err) {
2490 dev_err(dev, "Invalid MAC address, aborting\n");
2491 goto err_out_dev_deinit;
2492 }
2493
2494 enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2495 enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2496
2497 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
2498 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2499 else
2500 netdev->netdev_ops = &enic_netdev_ops;
2501
2502 netdev->watchdog_timeo = 2 * HZ;
2503 netdev->ethtool_ops = &enic_ethtool_ops;
2504
2505 netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2506 if (ENIC_SETTING(enic, LOOP)) {
2507 netdev->features &= ~NETIF_F_HW_VLAN_TX;
2508 enic->loop_enable = 1;
2509 enic->loop_tag = enic->config.loop_tag;
2510 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2511 }
2512 if (ENIC_SETTING(enic, TXCSUM))
2513 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2514 if (ENIC_SETTING(enic, TSO))
2515 netdev->hw_features |= NETIF_F_TSO |
2516 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2517 if (ENIC_SETTING(enic, RXCSUM))
2518 netdev->hw_features |= NETIF_F_RXCSUM;
2519
2520 netdev->features |= netdev->hw_features;
2521
2522 if (using_dac)
2523 netdev->features |= NETIF_F_HIGHDMA;
2524
2525 netdev->priv_flags |= IFF_UNICAST_FLT;
2526
2527 err = register_netdev(netdev);
2528 if (err) {
2529 dev_err(dev, "Cannot register net device, aborting\n");
2530 goto err_out_dev_deinit;
2531 }
2532
2533 return 0;
2534
2535 err_out_dev_deinit:
2536 enic_dev_deinit(enic);
2537 err_out_dev_close:
2538 vnic_dev_close(enic->vdev);
2539 err_out_disable_sriov:
2540 kfree(enic->pp);
2541 err_out_disable_sriov_pp:
2542 #ifdef CONFIG_PCI_IOV
2543 if (enic_sriov_enabled(enic)) {
2544 pci_disable_sriov(pdev);
2545 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2546 }
2547 err_out_vnic_unregister:
2548 #endif
2549 vnic_dev_unregister(enic->vdev);
2550 err_out_iounmap:
2551 enic_iounmap(enic);
2552 err_out_release_regions:
2553 pci_release_regions(pdev);
2554 err_out_disable_device:
2555 pci_disable_device(pdev);
2556 err_out_free_netdev:
2557 pci_set_drvdata(pdev, NULL);
2558 free_netdev(netdev);
2559
2560 return err;
2561 }
2562
2563 static void __devexit enic_remove(struct pci_dev *pdev)
2564 {
2565 struct net_device *netdev = pci_get_drvdata(pdev);
2566
2567 if (netdev) {
2568 struct enic *enic = netdev_priv(netdev);
2569
2570 cancel_work_sync(&enic->reset);
2571 cancel_work_sync(&enic->change_mtu_work);
2572 unregister_netdev(netdev);
2573 enic_dev_deinit(enic);
2574 vnic_dev_close(enic->vdev);
2575 #ifdef CONFIG_PCI_IOV
2576 if (enic_sriov_enabled(enic)) {
2577 pci_disable_sriov(pdev);
2578 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2579 }
2580 #endif
2581 kfree(enic->pp);
2582 vnic_dev_unregister(enic->vdev);
2583 enic_iounmap(enic);
2584 pci_release_regions(pdev);
2585 pci_disable_device(pdev);
2586 pci_set_drvdata(pdev, NULL);
2587 free_netdev(netdev);
2588 }
2589 }
2590
2591 static struct pci_driver enic_driver = {
2592 .name = DRV_NAME,
2593 .id_table = enic_id_table,
2594 .probe = enic_probe,
2595 .remove = __devexit_p(enic_remove),
2596 };
2597
2598 static int __init enic_init_module(void)
2599 {
2600 pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2601
2602 return pci_register_driver(&enic_driver);
2603 }
2604
2605 static void __exit enic_cleanup_module(void)
2606 {
2607 pci_unregister_driver(&enic_driver);
2608 }
2609
2610 module_init(enic_init_module);
2611 module_exit(enic_cleanup_module);
Linux with added FPC-III support