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iwlwifi: fix frame injection for HT channels
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / enic / enic_main.c
blob8b9cad5e9712524df44f305cd43cbceadaba5ec8
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/workqueue.h>
27 #include <linux/pci.h>
28 #include <linux/netdevice.h>
29 #include <linux/etherdevice.h>
30 #include <linux/if_ether.h>
31 #include <linux/if_vlan.h>
32 #include <linux/ethtool.h>
33 #include <linux/in.h>
34 #include <linux/ip.h>
35 #include <linux/ipv6.h>
36 #include <linux/tcp.h>
37 #include <linux/rtnetlink.h>
38 #include <net/ip6_checksum.h>
39
40 #include "cq_enet_desc.h"
41 #include "vnic_dev.h"
42 #include "vnic_intr.h"
43 #include "vnic_stats.h"
44 #include "vnic_vic.h"
45 #include "enic_res.h"
46 #include "enic.h"
47 #include "enic_dev.h"
48
49 #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
50 #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS)
51 #define MAX_TSO (1 << 16)
52 #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
53
54 #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */
55 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */
56
57 /* Supported devices */
58 static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
59 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
60 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
61 { 0, } /* end of table */
62 };
63
64 MODULE_DESCRIPTION(DRV_DESCRIPTION);
65 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
66 MODULE_LICENSE("GPL");
67 MODULE_VERSION(DRV_VERSION);
68 MODULE_DEVICE_TABLE(pci, enic_id_table);
69
70 struct enic_stat {
71 char name[ETH_GSTRING_LEN];
72 unsigned int offset;
73 };
74
75 #define ENIC_TX_STAT(stat) \
76 { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
77 #define ENIC_RX_STAT(stat) \
78 { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
79
80 static const struct enic_stat enic_tx_stats[] = {
81 ENIC_TX_STAT(tx_frames_ok),
82 ENIC_TX_STAT(tx_unicast_frames_ok),
83 ENIC_TX_STAT(tx_multicast_frames_ok),
84 ENIC_TX_STAT(tx_broadcast_frames_ok),
85 ENIC_TX_STAT(tx_bytes_ok),
86 ENIC_TX_STAT(tx_unicast_bytes_ok),
87 ENIC_TX_STAT(tx_multicast_bytes_ok),
88 ENIC_TX_STAT(tx_broadcast_bytes_ok),
89 ENIC_TX_STAT(tx_drops),
90 ENIC_TX_STAT(tx_errors),
91 ENIC_TX_STAT(tx_tso),
92 };
93
94 static const struct enic_stat enic_rx_stats[] = {
95 ENIC_RX_STAT(rx_frames_ok),
96 ENIC_RX_STAT(rx_frames_total),
97 ENIC_RX_STAT(rx_unicast_frames_ok),
98 ENIC_RX_STAT(rx_multicast_frames_ok),
99 ENIC_RX_STAT(rx_broadcast_frames_ok),
100 ENIC_RX_STAT(rx_bytes_ok),
101 ENIC_RX_STAT(rx_unicast_bytes_ok),
102 ENIC_RX_STAT(rx_multicast_bytes_ok),
103 ENIC_RX_STAT(rx_broadcast_bytes_ok),
104 ENIC_RX_STAT(rx_drop),
105 ENIC_RX_STAT(rx_no_bufs),
106 ENIC_RX_STAT(rx_errors),
107 ENIC_RX_STAT(rx_rss),
108 ENIC_RX_STAT(rx_crc_errors),
109 ENIC_RX_STAT(rx_frames_64),
110 ENIC_RX_STAT(rx_frames_127),
111 ENIC_RX_STAT(rx_frames_255),
112 ENIC_RX_STAT(rx_frames_511),
113 ENIC_RX_STAT(rx_frames_1023),
114 ENIC_RX_STAT(rx_frames_1518),
115 ENIC_RX_STAT(rx_frames_to_max),
116 };
117
118 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
119 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
120
121 static int enic_is_dynamic(struct enic *enic)
122 {
123 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
124 }
125
126 static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
127 {
128 return rq;
129 }
130
131 static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
132 {
133 return enic->rq_count + wq;
134 }
135
136 static inline unsigned int enic_legacy_io_intr(void)
137 {
138 return 0;
139 }
140
141 static inline unsigned int enic_legacy_err_intr(void)
142 {
143 return 1;
144 }
145
146 static inline unsigned int enic_legacy_notify_intr(void)
147 {
148 return 2;
149 }
150
151 static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq)
152 {
153 return rq;
154 }
155
156 static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq)
157 {
158 return enic->rq_count + wq;
159 }
160
161 static inline unsigned int enic_msix_err_intr(struct enic *enic)
162 {
163 return enic->rq_count + enic->wq_count;
164 }
165
166 static inline unsigned int enic_msix_notify_intr(struct enic *enic)
167 {
168 return enic->rq_count + enic->wq_count + 1;
169 }
170
171 static int enic_get_settings(struct net_device *netdev,
172 struct ethtool_cmd *ecmd)
173 {
174 struct enic *enic = netdev_priv(netdev);
175
176 ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
177 ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
178 ecmd->port = PORT_FIBRE;
179 ecmd->transceiver = XCVR_EXTERNAL;
180
181 if (netif_carrier_ok(netdev)) {
182 ecmd->speed = vnic_dev_port_speed(enic->vdev);
183 ecmd->duplex = DUPLEX_FULL;
184 } else {
185 ecmd->speed = -1;
186 ecmd->duplex = -1;
187 }
188
189 ecmd->autoneg = AUTONEG_DISABLE;
190
191 return 0;
192 }
193
194 static void enic_get_drvinfo(struct net_device *netdev,
195 struct ethtool_drvinfo *drvinfo)
196 {
197 struct enic *enic = netdev_priv(netdev);
198 struct vnic_devcmd_fw_info *fw_info;
199
200 enic_dev_fw_info(enic, &fw_info);
201
202 strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
203 strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
204 strncpy(drvinfo->fw_version, fw_info->fw_version,
205 sizeof(drvinfo->fw_version));
206 strncpy(drvinfo->bus_info, pci_name(enic->pdev),
207 sizeof(drvinfo->bus_info));
208 }
209
210 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
211 {
212 unsigned int i;
213
214 switch (stringset) {
215 case ETH_SS_STATS:
216 for (i = 0; i < enic_n_tx_stats; i++) {
217 memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
218 data += ETH_GSTRING_LEN;
219 }
220 for (i = 0; i < enic_n_rx_stats; i++) {
221 memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
222 data += ETH_GSTRING_LEN;
223 }
224 break;
225 }
226 }
227
228 static int enic_get_sset_count(struct net_device *netdev, int sset)
229 {
230 switch (sset) {
231 case ETH_SS_STATS:
232 return enic_n_tx_stats + enic_n_rx_stats;
233 default:
234 return -EOPNOTSUPP;
235 }
236 }
237
238 static void enic_get_ethtool_stats(struct net_device *netdev,
239 struct ethtool_stats *stats, u64 *data)
240 {
241 struct enic *enic = netdev_priv(netdev);
242 struct vnic_stats *vstats;
243 unsigned int i;
244
245 enic_dev_stats_dump(enic, &vstats);
246
247 for (i = 0; i < enic_n_tx_stats; i++)
248 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
249 for (i = 0; i < enic_n_rx_stats; i++)
250 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
251 }
252
253 static u32 enic_get_rx_csum(struct net_device *netdev)
254 {
255 struct enic *enic = netdev_priv(netdev);
256 return enic->csum_rx_enabled;
257 }
258
259 static int enic_set_rx_csum(struct net_device *netdev, u32 data)
260 {
261 struct enic *enic = netdev_priv(netdev);
262
263 if (data && !ENIC_SETTING(enic, RXCSUM))
264 return -EINVAL;
265
266 enic->csum_rx_enabled = !!data;
267
268 return 0;
269 }
270
271 static int enic_set_tx_csum(struct net_device *netdev, u32 data)
272 {
273 struct enic *enic = netdev_priv(netdev);
274
275 if (data && !ENIC_SETTING(enic, TXCSUM))
276 return -EINVAL;
277
278 if (data)
279 netdev->features |= NETIF_F_HW_CSUM;
280 else
281 netdev->features &= ~NETIF_F_HW_CSUM;
282
283 return 0;
284 }
285
286 static int enic_set_tso(struct net_device *netdev, u32 data)
287 {
288 struct enic *enic = netdev_priv(netdev);
289
290 if (data && !ENIC_SETTING(enic, TSO))
291 return -EINVAL;
292
293 if (data)
294 netdev->features |=
295 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
296 else
297 netdev->features &=
298 ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN);
299
300 return 0;
301 }
302
303 static u32 enic_get_msglevel(struct net_device *netdev)
304 {
305 struct enic *enic = netdev_priv(netdev);
306 return enic->msg_enable;
307 }
308
309 static void enic_set_msglevel(struct net_device *netdev, u32 value)
310 {
311 struct enic *enic = netdev_priv(netdev);
312 enic->msg_enable = value;
313 }
314
315 static int enic_get_coalesce(struct net_device *netdev,
316 struct ethtool_coalesce *ecmd)
317 {
318 struct enic *enic = netdev_priv(netdev);
319
320 ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
321 ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
322
323 return 0;
324 }
325
326 static int enic_set_coalesce(struct net_device *netdev,
327 struct ethtool_coalesce *ecmd)
328 {
329 struct enic *enic = netdev_priv(netdev);
330 u32 tx_coalesce_usecs;
331 u32 rx_coalesce_usecs;
332 unsigned int i, intr;
333
334 tx_coalesce_usecs = min_t(u32,
335 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
336 ecmd->tx_coalesce_usecs);
337 rx_coalesce_usecs = min_t(u32,
338 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
339 ecmd->rx_coalesce_usecs);
340
341 switch (vnic_dev_get_intr_mode(enic->vdev)) {
342 case VNIC_DEV_INTR_MODE_INTX:
343 if (tx_coalesce_usecs != rx_coalesce_usecs)
344 return -EINVAL;
345
346 intr = enic_legacy_io_intr();
347 vnic_intr_coalescing_timer_set(&enic->intr[intr],
348 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
349 break;
350 case VNIC_DEV_INTR_MODE_MSI:
351 if (tx_coalesce_usecs != rx_coalesce_usecs)
352 return -EINVAL;
353
354 vnic_intr_coalescing_timer_set(&enic->intr[0],
355 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
356 break;
357 case VNIC_DEV_INTR_MODE_MSIX:
358 for (i = 0; i < enic->wq_count; i++) {
359 intr = enic_msix_wq_intr(enic, i);
360 vnic_intr_coalescing_timer_set(&enic->intr[intr],
361 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
362 }
363
364 for (i = 0; i < enic->rq_count; i++) {
365 intr = enic_msix_rq_intr(enic, i);
366 vnic_intr_coalescing_timer_set(&enic->intr[intr],
367 INTR_COALESCE_USEC_TO_HW(rx_coalesce_usecs));
368 }
369
370 break;
371 default:
372 break;
373 }
374
375 enic->tx_coalesce_usecs = tx_coalesce_usecs;
376 enic->rx_coalesce_usecs = rx_coalesce_usecs;
377
378 return 0;
379 }
380
381 static const struct ethtool_ops enic_ethtool_ops = {
382 .get_settings = enic_get_settings,
383 .get_drvinfo = enic_get_drvinfo,
384 .get_msglevel = enic_get_msglevel,
385 .set_msglevel = enic_set_msglevel,
386 .get_link = ethtool_op_get_link,
387 .get_strings = enic_get_strings,
388 .get_sset_count = enic_get_sset_count,
389 .get_ethtool_stats = enic_get_ethtool_stats,
390 .get_rx_csum = enic_get_rx_csum,
391 .set_rx_csum = enic_set_rx_csum,
392 .get_tx_csum = ethtool_op_get_tx_csum,
393 .set_tx_csum = enic_set_tx_csum,
394 .get_sg = ethtool_op_get_sg,
395 .set_sg = ethtool_op_set_sg,
396 .get_tso = ethtool_op_get_tso,
397 .set_tso = enic_set_tso,
398 .get_coalesce = enic_get_coalesce,
399 .set_coalesce = enic_set_coalesce,
400 .get_flags = ethtool_op_get_flags,
401 };
402
403 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
404 {
405 struct enic *enic = vnic_dev_priv(wq->vdev);
406
407 if (buf->sop)
408 pci_unmap_single(enic->pdev, buf->dma_addr,
409 buf->len, PCI_DMA_TODEVICE);
410 else
411 pci_unmap_page(enic->pdev, buf->dma_addr,
412 buf->len, PCI_DMA_TODEVICE);
413
414 if (buf->os_buf)
415 dev_kfree_skb_any(buf->os_buf);
416 }
417
418 static void enic_wq_free_buf(struct vnic_wq *wq,
419 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
420 {
421 enic_free_wq_buf(wq, buf);
422 }
423
424 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
425 u8 type, u16 q_number, u16 completed_index, void *opaque)
426 {
427 struct enic *enic = vnic_dev_priv(vdev);
428
429 spin_lock(&enic->wq_lock[q_number]);
430
431 vnic_wq_service(&enic->wq[q_number], cq_desc,
432 completed_index, enic_wq_free_buf,
433 opaque);
434
435 if (netif_queue_stopped(enic->netdev) &&
436 vnic_wq_desc_avail(&enic->wq[q_number]) >=
437 (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
438 netif_wake_queue(enic->netdev);
439
440 spin_unlock(&enic->wq_lock[q_number]);
441
442 return 0;
443 }
444
445 static void enic_log_q_error(struct enic *enic)
446 {
447 unsigned int i;
448 u32 error_status;
449
450 for (i = 0; i < enic->wq_count; i++) {
451 error_status = vnic_wq_error_status(&enic->wq[i]);
452 if (error_status)
453 netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
454 i, error_status);
455 }
456
457 for (i = 0; i < enic->rq_count; i++) {
458 error_status = vnic_rq_error_status(&enic->rq[i]);
459 if (error_status)
460 netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
461 i, error_status);
462 }
463 }
464
465 static void enic_msglvl_check(struct enic *enic)
466 {
467 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
468
469 if (msg_enable != enic->msg_enable) {
470 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
471 enic->msg_enable, msg_enable);
472 enic->msg_enable = msg_enable;
473 }
474 }
475
476 static void enic_mtu_check(struct enic *enic)
477 {
478 u32 mtu = vnic_dev_mtu(enic->vdev);
479 struct net_device *netdev = enic->netdev;
480
481 if (mtu && mtu != enic->port_mtu) {
482 enic->port_mtu = mtu;
483 if (mtu < netdev->mtu)
484 netdev_warn(netdev,
485 "interface MTU (%d) set higher "
486 "than switch port MTU (%d)\n",
487 netdev->mtu, mtu);
488 }
489 }
490
491 static void enic_link_check(struct enic *enic)
492 {
493 int link_status = vnic_dev_link_status(enic->vdev);
494 int carrier_ok = netif_carrier_ok(enic->netdev);
495
496 if (link_status && !carrier_ok) {
497 netdev_info(enic->netdev, "Link UP\n");
498 netif_carrier_on(enic->netdev);
499 } else if (!link_status && carrier_ok) {
500 netdev_info(enic->netdev, "Link DOWN\n");
501 netif_carrier_off(enic->netdev);
502 }
503 }
504
505 static void enic_notify_check(struct enic *enic)
506 {
507 enic_msglvl_check(enic);
508 enic_mtu_check(enic);
509 enic_link_check(enic);
510 }
511
512 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
513
514 static irqreturn_t enic_isr_legacy(int irq, void *data)
515 {
516 struct net_device *netdev = data;
517 struct enic *enic = netdev_priv(netdev);
518 unsigned int io_intr = enic_legacy_io_intr();
519 unsigned int err_intr = enic_legacy_err_intr();
520 unsigned int notify_intr = enic_legacy_notify_intr();
521 u32 pba;
522
523 vnic_intr_mask(&enic->intr[io_intr]);
524
525 pba = vnic_intr_legacy_pba(enic->legacy_pba);
526 if (!pba) {
527 vnic_intr_unmask(&enic->intr[io_intr]);
528 return IRQ_NONE; /* not our interrupt */
529 }
530
531 if (ENIC_TEST_INTR(pba, notify_intr)) {
532 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
533 enic_notify_check(enic);
534 }
535
536 if (ENIC_TEST_INTR(pba, err_intr)) {
537 vnic_intr_return_all_credits(&enic->intr[err_intr]);
538 enic_log_q_error(enic);
539 /* schedule recovery from WQ/RQ error */
540 schedule_work(&enic->reset);
541 return IRQ_HANDLED;
542 }
543
544 if (ENIC_TEST_INTR(pba, io_intr)) {
545 if (napi_schedule_prep(&enic->napi[0]))
546 __napi_schedule(&enic->napi[0]);
547 } else {
548 vnic_intr_unmask(&enic->intr[io_intr]);
549 }
550
551 return IRQ_HANDLED;
552 }
553
554 static irqreturn_t enic_isr_msi(int irq, void *data)
555 {
556 struct enic *enic = data;
557
558 /* With MSI, there is no sharing of interrupts, so this is
559 * our interrupt and there is no need to ack it. The device
560 * is not providing per-vector masking, so the OS will not
561 * write to PCI config space to mask/unmask the interrupt.
562 * We're using mask_on_assertion for MSI, so the device
563 * automatically masks the interrupt when the interrupt is
564 * generated. Later, when exiting polling, the interrupt
565 * will be unmasked (see enic_poll).
566 *
567 * Also, the device uses the same PCIe Traffic Class (TC)
568 * for Memory Write data and MSI, so there are no ordering
569 * issues; the MSI will always arrive at the Root Complex
570 * _after_ corresponding Memory Writes (i.e. descriptor
571 * writes).
572 */
573
574 napi_schedule(&enic->napi[0]);
575
576 return IRQ_HANDLED;
577 }
578
579 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
580 {
581 struct napi_struct *napi = data;
582
583 /* schedule NAPI polling for RQ cleanup */
584 napi_schedule(napi);
585
586 return IRQ_HANDLED;
587 }
588
589 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
590 {
591 struct enic *enic = data;
592 unsigned int cq = enic_cq_wq(enic, 0);
593 unsigned int intr = enic_msix_wq_intr(enic, 0);
594 unsigned int wq_work_to_do = -1; /* no limit */
595 unsigned int wq_work_done;
596
597 wq_work_done = vnic_cq_service(&enic->cq[cq],
598 wq_work_to_do, enic_wq_service, NULL);
599
600 vnic_intr_return_credits(&enic->intr[intr],
601 wq_work_done,
602 1 /* unmask intr */,
603 1 /* reset intr timer */);
604
605 return IRQ_HANDLED;
606 }
607
608 static irqreturn_t enic_isr_msix_err(int irq, void *data)
609 {
610 struct enic *enic = data;
611 unsigned int intr = enic_msix_err_intr(enic);
612
613 vnic_intr_return_all_credits(&enic->intr[intr]);
614
615 enic_log_q_error(enic);
616
617 /* schedule recovery from WQ/RQ error */
618 schedule_work(&enic->reset);
619
620 return IRQ_HANDLED;
621 }
622
623 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
624 {
625 struct enic *enic = data;
626 unsigned int intr = enic_msix_notify_intr(enic);
627
628 vnic_intr_return_all_credits(&enic->intr[intr]);
629 enic_notify_check(enic);
630
631 return IRQ_HANDLED;
632 }
633
634 static inline void enic_queue_wq_skb_cont(struct enic *enic,
635 struct vnic_wq *wq, struct sk_buff *skb,
636 unsigned int len_left, int loopback)
637 {
638 skb_frag_t *frag;
639
640 /* Queue additional data fragments */
641 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
642 len_left -= frag->size;
643 enic_queue_wq_desc_cont(wq, skb,
644 pci_map_page(enic->pdev, frag->page,
645 frag->page_offset, frag->size,
646 PCI_DMA_TODEVICE),
647 frag->size,
648 (len_left == 0), /* EOP? */
649 loopback);
650 }
651 }
652
653 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
654 struct vnic_wq *wq, struct sk_buff *skb,
655 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
656 {
657 unsigned int head_len = skb_headlen(skb);
658 unsigned int len_left = skb->len - head_len;
659 int eop = (len_left == 0);
660
661 /* Queue the main skb fragment. The fragments are no larger
662 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
663 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
664 * per fragment is queued.
665 */
666 enic_queue_wq_desc(wq, skb,
667 pci_map_single(enic->pdev, skb->data,
668 head_len, PCI_DMA_TODEVICE),
669 head_len,
670 vlan_tag_insert, vlan_tag,
671 eop, loopback);
672
673 if (!eop)
674 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
675 }
676
677 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
678 struct vnic_wq *wq, struct sk_buff *skb,
679 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
680 {
681 unsigned int head_len = skb_headlen(skb);
682 unsigned int len_left = skb->len - head_len;
683 unsigned int hdr_len = skb_checksum_start_offset(skb);
684 unsigned int csum_offset = hdr_len + skb->csum_offset;
685 int eop = (len_left == 0);
686
687 /* Queue the main skb fragment. The fragments are no larger
688 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
689 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
690 * per fragment is queued.
691 */
692 enic_queue_wq_desc_csum_l4(wq, skb,
693 pci_map_single(enic->pdev, skb->data,
694 head_len, PCI_DMA_TODEVICE),
695 head_len,
696 csum_offset,
697 hdr_len,
698 vlan_tag_insert, vlan_tag,
699 eop, loopback);
700
701 if (!eop)
702 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
703 }
704
705 static inline void enic_queue_wq_skb_tso(struct enic *enic,
706 struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
707 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
708 {
709 unsigned int frag_len_left = skb_headlen(skb);
710 unsigned int len_left = skb->len - frag_len_left;
711 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
712 int eop = (len_left == 0);
713 unsigned int len;
714 dma_addr_t dma_addr;
715 unsigned int offset = 0;
716 skb_frag_t *frag;
717
718 /* Preload TCP csum field with IP pseudo hdr calculated
719 * with IP length set to zero. HW will later add in length
720 * to each TCP segment resulting from the TSO.
721 */
722
723 if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
724 ip_hdr(skb)->check = 0;
725 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
726 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
727 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
728 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
729 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
730 }
731
732 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
733 * for the main skb fragment
734 */
735 while (frag_len_left) {
736 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
737 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
738 len, PCI_DMA_TODEVICE);
739 enic_queue_wq_desc_tso(wq, skb,
740 dma_addr,
741 len,
742 mss, hdr_len,
743 vlan_tag_insert, vlan_tag,
744 eop && (len == frag_len_left), loopback);
745 frag_len_left -= len;
746 offset += len;
747 }
748
749 if (eop)
750 return;
751
752 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
753 * for additional data fragments
754 */
755 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
756 len_left -= frag->size;
757 frag_len_left = frag->size;
758 offset = frag->page_offset;
759
760 while (frag_len_left) {
761 len = min(frag_len_left,
762 (unsigned int)WQ_ENET_MAX_DESC_LEN);
763 dma_addr = pci_map_page(enic->pdev, frag->page,
764 offset, len,
765 PCI_DMA_TODEVICE);
766 enic_queue_wq_desc_cont(wq, skb,
767 dma_addr,
768 len,
769 (len_left == 0) &&
770 (len == frag_len_left), /* EOP? */
771 loopback);
772 frag_len_left -= len;
773 offset += len;
774 }
775 }
776 }
777
778 static inline void enic_queue_wq_skb(struct enic *enic,
779 struct vnic_wq *wq, struct sk_buff *skb)
780 {
781 unsigned int mss = skb_shinfo(skb)->gso_size;
782 unsigned int vlan_tag = 0;
783 int vlan_tag_insert = 0;
784 int loopback = 0;
785
786 if (vlan_tx_tag_present(skb)) {
787 /* VLAN tag from trunking driver */
788 vlan_tag_insert = 1;
789 vlan_tag = vlan_tx_tag_get(skb);
790 } else if (enic->loop_enable) {
791 vlan_tag = enic->loop_tag;
792 loopback = 1;
793 }
794
795 if (mss)
796 enic_queue_wq_skb_tso(enic, wq, skb, mss,
797 vlan_tag_insert, vlan_tag, loopback);
798 else if (skb->ip_summed == CHECKSUM_PARTIAL)
799 enic_queue_wq_skb_csum_l4(enic, wq, skb,
800 vlan_tag_insert, vlan_tag, loopback);
801 else
802 enic_queue_wq_skb_vlan(enic, wq, skb,
803 vlan_tag_insert, vlan_tag, loopback);
804 }
805
806 /* netif_tx_lock held, process context with BHs disabled, or BH */
807 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
808 struct net_device *netdev)
809 {
810 struct enic *enic = netdev_priv(netdev);
811 struct vnic_wq *wq = &enic->wq[0];
812 unsigned long flags;
813
814 if (skb->len <= 0) {
815 dev_kfree_skb(skb);
816 return NETDEV_TX_OK;
817 }
818
819 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
820 * which is very likely. In the off chance it's going to take
821 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
822 */
823
824 if (skb_shinfo(skb)->gso_size == 0 &&
825 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
826 skb_linearize(skb)) {
827 dev_kfree_skb(skb);
828 return NETDEV_TX_OK;
829 }
830
831 spin_lock_irqsave(&enic->wq_lock[0], flags);
832
833 if (vnic_wq_desc_avail(wq) <
834 skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
835 netif_stop_queue(netdev);
836 /* This is a hard error, log it */
837 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
838 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
839 return NETDEV_TX_BUSY;
840 }
841
842 enic_queue_wq_skb(enic, wq, skb);
843
844 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
845 netif_stop_queue(netdev);
846
847 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
848
849 return NETDEV_TX_OK;
850 }
851
852 /* dev_base_lock rwlock held, nominally process context */
853 static struct net_device_stats *enic_get_stats(struct net_device *netdev)
854 {
855 struct enic *enic = netdev_priv(netdev);
856 struct net_device_stats *net_stats = &netdev->stats;
857 struct vnic_stats *stats;
858
859 enic_dev_stats_dump(enic, &stats);
860
861 net_stats->tx_packets = stats->tx.tx_frames_ok;
862 net_stats->tx_bytes = stats->tx.tx_bytes_ok;
863 net_stats->tx_errors = stats->tx.tx_errors;
864 net_stats->tx_dropped = stats->tx.tx_drops;
865
866 net_stats->rx_packets = stats->rx.rx_frames_ok;
867 net_stats->rx_bytes = stats->rx.rx_bytes_ok;
868 net_stats->rx_errors = stats->rx.rx_errors;
869 net_stats->multicast = stats->rx.rx_multicast_frames_ok;
870 net_stats->rx_over_errors = enic->rq_truncated_pkts;
871 net_stats->rx_crc_errors = enic->rq_bad_fcs;
872 net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
873
874 return net_stats;
875 }
876
877 static void enic_reset_addr_lists(struct enic *enic)
878 {
879 enic->mc_count = 0;
880 enic->uc_count = 0;
881 enic->flags = 0;
882 }
883
884 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
885 {
886 struct enic *enic = netdev_priv(netdev);
887
888 if (enic_is_dynamic(enic)) {
889 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
890 return -EADDRNOTAVAIL;
891 } else {
892 if (!is_valid_ether_addr(addr))
893 return -EADDRNOTAVAIL;
894 }
895
896 memcpy(netdev->dev_addr, addr, netdev->addr_len);
897
898 return 0;
899 }
900
901 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
902 {
903 struct enic *enic = netdev_priv(netdev);
904 struct sockaddr *saddr = p;
905 char *addr = saddr->sa_data;
906 int err;
907
908 if (netif_running(enic->netdev)) {
909 err = enic_dev_del_station_addr(enic);
910 if (err)
911 return err;
912 }
913
914 err = enic_set_mac_addr(netdev, addr);
915 if (err)
916 return err;
917
918 if (netif_running(enic->netdev)) {
919 err = enic_dev_add_station_addr(enic);
920 if (err)
921 return err;
922 }
923
924 return err;
925 }
926
927 static int enic_set_mac_address(struct net_device *netdev, void *p)
928 {
929 struct sockaddr *saddr = p;
930 char *addr = saddr->sa_data;
931 struct enic *enic = netdev_priv(netdev);
932 int err;
933
934 err = enic_dev_del_station_addr(enic);
935 if (err)
936 return err;
937
938 err = enic_set_mac_addr(netdev, addr);
939 if (err)
940 return err;
941
942 return enic_dev_add_station_addr(enic);
943 }
944
945 static void enic_update_multicast_addr_list(struct enic *enic)
946 {
947 struct net_device *netdev = enic->netdev;
948 struct netdev_hw_addr *ha;
949 unsigned int mc_count = netdev_mc_count(netdev);
950 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
951 unsigned int i, j;
952
953 if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
954 netdev_warn(netdev, "Registering only %d out of %d "
955 "multicast addresses\n",
956 ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
957 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
958 }
959
960 /* Is there an easier way? Trying to minimize to
961 * calls to add/del multicast addrs. We keep the
962 * addrs from the last call in enic->mc_addr and
963 * look for changes to add/del.
964 */
965
966 i = 0;
967 netdev_for_each_mc_addr(ha, netdev) {
968 if (i == mc_count)
969 break;
970 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
971 }
972
973 for (i = 0; i < enic->mc_count; i++) {
974 for (j = 0; j < mc_count; j++)
975 if (compare_ether_addr(enic->mc_addr[i],
976 mc_addr[j]) == 0)
977 break;
978 if (j == mc_count)
979 enic_dev_del_addr(enic, enic->mc_addr[i]);
980 }
981
982 for (i = 0; i < mc_count; i++) {
983 for (j = 0; j < enic->mc_count; j++)
984 if (compare_ether_addr(mc_addr[i],
985 enic->mc_addr[j]) == 0)
986 break;
987 if (j == enic->mc_count)
988 enic_dev_add_addr(enic, mc_addr[i]);
989 }
990
991 /* Save the list to compare against next time
992 */
993
994 for (i = 0; i < mc_count; i++)
995 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
996
997 enic->mc_count = mc_count;
998 }
999
1000 static void enic_update_unicast_addr_list(struct enic *enic)
1001 {
1002 struct net_device *netdev = enic->netdev;
1003 struct netdev_hw_addr *ha;
1004 unsigned int uc_count = netdev_uc_count(netdev);
1005 u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
1006 unsigned int i, j;
1007
1008 if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
1009 netdev_warn(netdev, "Registering only %d out of %d "
1010 "unicast addresses\n",
1011 ENIC_UNICAST_PERFECT_FILTERS, uc_count);
1012 uc_count = ENIC_UNICAST_PERFECT_FILTERS;
1013 }
1014
1015 /* Is there an easier way? Trying to minimize to
1016 * calls to add/del unicast addrs. We keep the
1017 * addrs from the last call in enic->uc_addr and
1018 * look for changes to add/del.
1019 */
1020
1021 i = 0;
1022 netdev_for_each_uc_addr(ha, netdev) {
1023 if (i == uc_count)
1024 break;
1025 memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
1026 }
1027
1028 for (i = 0; i < enic->uc_count; i++) {
1029 for (j = 0; j < uc_count; j++)
1030 if (compare_ether_addr(enic->uc_addr[i],
1031 uc_addr[j]) == 0)
1032 break;
1033 if (j == uc_count)
1034 enic_dev_del_addr(enic, enic->uc_addr[i]);
1035 }
1036
1037 for (i = 0; i < uc_count; i++) {
1038 for (j = 0; j < enic->uc_count; j++)
1039 if (compare_ether_addr(uc_addr[i],
1040 enic->uc_addr[j]) == 0)
1041 break;
1042 if (j == enic->uc_count)
1043 enic_dev_add_addr(enic, uc_addr[i]);
1044 }
1045
1046 /* Save the list to compare against next time
1047 */
1048
1049 for (i = 0; i < uc_count; i++)
1050 memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
1051
1052 enic->uc_count = uc_count;
1053 }
1054
1055 /* netif_tx_lock held, BHs disabled */
1056 static void enic_set_rx_mode(struct net_device *netdev)
1057 {
1058 struct enic *enic = netdev_priv(netdev);
1059 int directed = 1;
1060 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1061 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1062 int promisc = (netdev->flags & IFF_PROMISC) ||
1063 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
1064 int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1065 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
1066 unsigned int flags = netdev->flags |
1067 (allmulti ? IFF_ALLMULTI : 0) |
1068 (promisc ? IFF_PROMISC : 0);
1069
1070 if (enic->flags != flags) {
1071 enic->flags = flags;
1072 enic_dev_packet_filter(enic, directed,
1073 multicast, broadcast, promisc, allmulti);
1074 }
1075
1076 if (!promisc) {
1077 enic_update_unicast_addr_list(enic);
1078 if (!allmulti)
1079 enic_update_multicast_addr_list(enic);
1080 }
1081 }
1082
1083 /* rtnl lock is held */
1084 static void enic_vlan_rx_register(struct net_device *netdev,
1085 struct vlan_group *vlan_group)
1086 {
1087 struct enic *enic = netdev_priv(netdev);
1088 enic->vlan_group = vlan_group;
1089 }
1090
1091 /* netif_tx_lock held, BHs disabled */
1092 static void enic_tx_timeout(struct net_device *netdev)
1093 {
1094 struct enic *enic = netdev_priv(netdev);
1095 schedule_work(&enic->reset);
1096 }
1097
1098 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
1099 {
1100 struct enic *enic = netdev_priv(netdev);
1101
1102 if (vf != PORT_SELF_VF)
1103 return -EOPNOTSUPP;
1104
1105 /* Ignore the vf argument for now. We can assume the request
1106 * is coming on a vf.
1107 */
1108 if (is_valid_ether_addr(mac)) {
1109 memcpy(enic->pp.vf_mac, mac, ETH_ALEN);
1110 return 0;
1111 } else
1112 return -EINVAL;
1113 }
1114
1115 static int enic_set_port_profile(struct enic *enic, u8 *mac)
1116 {
1117 struct vic_provinfo *vp;
1118 u8 oui[3] = VIC_PROVINFO_CISCO_OUI;
1119 u16 os_type = VIC_GENERIC_PROV_OS_TYPE_LINUX;
1120 char uuid_str[38];
1121 char client_mac_str[18];
1122 u8 *client_mac;
1123 int err;
1124
1125 err = enic_vnic_dev_deinit(enic);
1126 if (err)
1127 return err;
1128
1129 enic_reset_addr_lists(enic);
1130
1131 switch (enic->pp.request) {
1132
1133 case PORT_REQUEST_ASSOCIATE:
1134
1135 if (!(enic->pp.set & ENIC_SET_NAME) || !strlen(enic->pp.name))
1136 return -EINVAL;
1137
1138 if (!is_valid_ether_addr(mac))
1139 return -EADDRNOTAVAIL;
1140
1141 vp = vic_provinfo_alloc(GFP_KERNEL, oui,
1142 VIC_PROVINFO_GENERIC_TYPE);
1143 if (!vp)
1144 return -ENOMEM;
1145
1146 vic_provinfo_add_tlv(vp,
1147 VIC_GENERIC_PROV_TLV_PORT_PROFILE_NAME_STR,
1148 strlen(enic->pp.name) + 1, enic->pp.name);
1149
1150 if (!is_zero_ether_addr(enic->pp.mac_addr))
1151 client_mac = enic->pp.mac_addr;
1152 else
1153 client_mac = mac;
1154
1155 vic_provinfo_add_tlv(vp,
1156 VIC_GENERIC_PROV_TLV_CLIENT_MAC_ADDR,
1157 ETH_ALEN, client_mac);
1158
1159 sprintf(client_mac_str, "%pM", client_mac);
1160 vic_provinfo_add_tlv(vp,
1161 VIC_GENERIC_PROV_TLV_CLUSTER_PORT_UUID_STR,
1162 sizeof(client_mac_str), client_mac_str);
1163
1164 if (enic->pp.set & ENIC_SET_INSTANCE) {
1165 sprintf(uuid_str, "%pUB", enic->pp.instance_uuid);
1166 vic_provinfo_add_tlv(vp,
1167 VIC_GENERIC_PROV_TLV_CLIENT_UUID_STR,
1168 sizeof(uuid_str), uuid_str);
1169 }
1170
1171 if (enic->pp.set & ENIC_SET_HOST) {
1172 sprintf(uuid_str, "%pUB", enic->pp.host_uuid);
1173 vic_provinfo_add_tlv(vp,
1174 VIC_GENERIC_PROV_TLV_HOST_UUID_STR,
1175 sizeof(uuid_str), uuid_str);
1176 }
1177
1178 os_type = htons(os_type);
1179 vic_provinfo_add_tlv(vp,
1180 VIC_GENERIC_PROV_TLV_OS_TYPE,
1181 sizeof(os_type), &os_type);
1182
1183 err = enic_dev_init_prov(enic, vp);
1184 vic_provinfo_free(vp);
1185 if (err)
1186 return err;
1187 break;
1188
1189 case PORT_REQUEST_DISASSOCIATE:
1190 break;
1191
1192 default:
1193 return -EINVAL;
1194 }
1195
1196 /* Set flag to indicate that the port assoc/disassoc
1197 * request has been sent out to fw
1198 */
1199 enic->pp.set |= ENIC_PORT_REQUEST_APPLIED;
1200
1201 return 0;
1202 }
1203
1204 static int enic_set_vf_port(struct net_device *netdev, int vf,
1205 struct nlattr *port[])
1206 {
1207 struct enic *enic = netdev_priv(netdev);
1208 struct enic_port_profile new_pp;
1209 int err = 0;
1210
1211 memset(&new_pp, 0, sizeof(new_pp));
1212
1213 if (port[IFLA_PORT_REQUEST]) {
1214 new_pp.set |= ENIC_SET_REQUEST;
1215 new_pp.request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1216 }
1217
1218 if (port[IFLA_PORT_PROFILE]) {
1219 new_pp.set |= ENIC_SET_NAME;
1220 memcpy(new_pp.name, nla_data(port[IFLA_PORT_PROFILE]),
1221 PORT_PROFILE_MAX);
1222 }
1223
1224 if (port[IFLA_PORT_INSTANCE_UUID]) {
1225 new_pp.set |= ENIC_SET_INSTANCE;
1226 memcpy(new_pp.instance_uuid,
1227 nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1228 }
1229
1230 if (port[IFLA_PORT_HOST_UUID]) {
1231 new_pp.set |= ENIC_SET_HOST;
1232 memcpy(new_pp.host_uuid,
1233 nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1234 }
1235
1236 /* don't support VFs, yet */
1237 if (vf != PORT_SELF_VF)
1238 return -EOPNOTSUPP;
1239
1240 if (!(new_pp.set & ENIC_SET_REQUEST))
1241 return -EOPNOTSUPP;
1242
1243 if (new_pp.request == PORT_REQUEST_ASSOCIATE) {
1244 /* Special case handling */
1245 if (!is_zero_ether_addr(enic->pp.vf_mac))
1246 memcpy(new_pp.mac_addr, enic->pp.vf_mac, ETH_ALEN);
1247
1248 if (is_zero_ether_addr(netdev->dev_addr))
1249 random_ether_addr(netdev->dev_addr);
1250 }
1251
1252 memcpy(&enic->pp, &new_pp, sizeof(struct enic_port_profile));
1253
1254 err = enic_set_port_profile(enic, netdev->dev_addr);
1255 if (err)
1256 goto set_port_profile_cleanup;
1257
1258 set_port_profile_cleanup:
1259 memset(enic->pp.vf_mac, 0, ETH_ALEN);
1260
1261 if (err || enic->pp.request == PORT_REQUEST_DISASSOCIATE) {
1262 memset(netdev->dev_addr, 0, ETH_ALEN);
1263 memset(enic->pp.mac_addr, 0, ETH_ALEN);
1264 }
1265
1266 return err;
1267 }
1268
1269 static int enic_get_vf_port(struct net_device *netdev, int vf,
1270 struct sk_buff *skb)
1271 {
1272 struct enic *enic = netdev_priv(netdev);
1273 int err, error, done;
1274 u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1275
1276 if (!(enic->pp.set & ENIC_PORT_REQUEST_APPLIED))
1277 return -ENODATA;
1278
1279 err = enic_dev_init_done(enic, &done, &error);
1280 if (err)
1281 error = err;
1282
1283 switch (error) {
1284 case ERR_SUCCESS:
1285 if (!done)
1286 response = PORT_PROFILE_RESPONSE_INPROGRESS;
1287 break;
1288 case ERR_EINVAL:
1289 response = PORT_PROFILE_RESPONSE_INVALID;
1290 break;
1291 case ERR_EBADSTATE:
1292 response = PORT_PROFILE_RESPONSE_BADSTATE;
1293 break;
1294 case ERR_ENOMEM:
1295 response = PORT_PROFILE_RESPONSE_INSUFFICIENT_RESOURCES;
1296 break;
1297 default:
1298 response = PORT_PROFILE_RESPONSE_ERROR;
1299 break;
1300 }
1301
1302 NLA_PUT_U16(skb, IFLA_PORT_REQUEST, enic->pp.request);
1303 NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
1304 if (enic->pp.set & ENIC_SET_NAME)
1305 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
1306 enic->pp.name);
1307 if (enic->pp.set & ENIC_SET_INSTANCE)
1308 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1309 enic->pp.instance_uuid);
1310 if (enic->pp.set & ENIC_SET_HOST)
1311 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
1312 enic->pp.host_uuid);
1313
1314 return 0;
1315
1316 nla_put_failure:
1317 return -EMSGSIZE;
1318 }
1319
1320 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1321 {
1322 struct enic *enic = vnic_dev_priv(rq->vdev);
1323
1324 if (!buf->os_buf)
1325 return;
1326
1327 pci_unmap_single(enic->pdev, buf->dma_addr,
1328 buf->len, PCI_DMA_FROMDEVICE);
1329 dev_kfree_skb_any(buf->os_buf);
1330 }
1331
1332 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1333 {
1334 struct enic *enic = vnic_dev_priv(rq->vdev);
1335 struct net_device *netdev = enic->netdev;
1336 struct sk_buff *skb;
1337 unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1338 unsigned int os_buf_index = 0;
1339 dma_addr_t dma_addr;
1340
1341 skb = netdev_alloc_skb_ip_align(netdev, len);
1342 if (!skb)
1343 return -ENOMEM;
1344
1345 dma_addr = pci_map_single(enic->pdev, skb->data,
1346 len, PCI_DMA_FROMDEVICE);
1347
1348 enic_queue_rq_desc(rq, skb, os_buf_index,
1349 dma_addr, len);
1350
1351 return 0;
1352 }
1353
1354 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1355 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1356 int skipped, void *opaque)
1357 {
1358 struct enic *enic = vnic_dev_priv(rq->vdev);
1359 struct net_device *netdev = enic->netdev;
1360 struct sk_buff *skb;
1361
1362 u8 type, color, eop, sop, ingress_port, vlan_stripped;
1363 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1364 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1365 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1366 u8 packet_error;
1367 u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1368 u32 rss_hash;
1369
1370 if (skipped)
1371 return;
1372
1373 skb = buf->os_buf;
1374 prefetch(skb->data - NET_IP_ALIGN);
1375 pci_unmap_single(enic->pdev, buf->dma_addr,
1376 buf->len, PCI_DMA_FROMDEVICE);
1377
1378 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1379 &type, &color, &q_number, &completed_index,
1380 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1381 &csum_not_calc, &rss_hash, &bytes_written,
1382 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1383 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1384 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1385 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1386 &fcs_ok);
1387
1388 if (packet_error) {
1389
1390 if (!fcs_ok) {
1391 if (bytes_written > 0)
1392 enic->rq_bad_fcs++;
1393 else if (bytes_written == 0)
1394 enic->rq_truncated_pkts++;
1395 }
1396
1397 dev_kfree_skb_any(skb);
1398
1399 return;
1400 }
1401
1402 if (eop && bytes_written > 0) {
1403
1404 /* Good receive
1405 */
1406
1407 skb_put(skb, bytes_written);
1408 skb->protocol = eth_type_trans(skb, netdev);
1409
1410 if (enic->csum_rx_enabled && !csum_not_calc) {
1411 skb->csum = htons(checksum);
1412 skb->ip_summed = CHECKSUM_COMPLETE;
1413 }
1414
1415 skb->dev = netdev;
1416
1417 if (enic->vlan_group && vlan_stripped &&
1418 (vlan_tci & CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_MASK)) {
1419
1420 if (netdev->features & NETIF_F_GRO)
1421 vlan_gro_receive(&enic->napi[q_number],
1422 enic->vlan_group, vlan_tci, skb);
1423 else
1424 vlan_hwaccel_receive_skb(skb,
1425 enic->vlan_group, vlan_tci);
1426
1427 } else {
1428
1429 if (netdev->features & NETIF_F_GRO)
1430 napi_gro_receive(&enic->napi[q_number], skb);
1431 else
1432 netif_receive_skb(skb);
1433
1434 }
1435 } else {
1436
1437 /* Buffer overflow
1438 */
1439
1440 dev_kfree_skb_any(skb);
1441 }
1442 }
1443
1444 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1445 u8 type, u16 q_number, u16 completed_index, void *opaque)
1446 {
1447 struct enic *enic = vnic_dev_priv(vdev);
1448
1449 vnic_rq_service(&enic->rq[q_number], cq_desc,
1450 completed_index, VNIC_RQ_RETURN_DESC,
1451 enic_rq_indicate_buf, opaque);
1452
1453 return 0;
1454 }
1455
1456 static int enic_poll(struct napi_struct *napi, int budget)
1457 {
1458 struct net_device *netdev = napi->dev;
1459 struct enic *enic = netdev_priv(netdev);
1460 unsigned int cq_rq = enic_cq_rq(enic, 0);
1461 unsigned int cq_wq = enic_cq_wq(enic, 0);
1462 unsigned int intr = enic_legacy_io_intr();
1463 unsigned int rq_work_to_do = budget;
1464 unsigned int wq_work_to_do = -1; /* no limit */
1465 unsigned int work_done, rq_work_done, wq_work_done;
1466 int err;
1467
1468 /* Service RQ (first) and WQ
1469 */
1470
1471 rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1472 rq_work_to_do, enic_rq_service, NULL);
1473
1474 wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
1475 wq_work_to_do, enic_wq_service, NULL);
1476
1477 /* Accumulate intr event credits for this polling
1478 * cycle. An intr event is the completion of a
1479 * a WQ or RQ packet.
1480 */
1481
1482 work_done = rq_work_done + wq_work_done;
1483
1484 if (work_done > 0)
1485 vnic_intr_return_credits(&enic->intr[intr],
1486 work_done,
1487 0 /* don't unmask intr */,
1488 0 /* don't reset intr timer */);
1489
1490 err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1491
1492 /* Buffer allocation failed. Stay in polling
1493 * mode so we can try to fill the ring again.
1494 */
1495
1496 if (err)
1497 rq_work_done = rq_work_to_do;
1498
1499 if (rq_work_done < rq_work_to_do) {
1500
1501 /* Some work done, but not enough to stay in polling,
1502 * exit polling
1503 */
1504
1505 napi_complete(napi);
1506 vnic_intr_unmask(&enic->intr[intr]);
1507 }
1508
1509 return rq_work_done;
1510 }
1511
1512 static int enic_poll_msix(struct napi_struct *napi, int budget)
1513 {
1514 struct net_device *netdev = napi->dev;
1515 struct enic *enic = netdev_priv(netdev);
1516 unsigned int rq = (napi - &enic->napi[0]);
1517 unsigned int cq = enic_cq_rq(enic, rq);
1518 unsigned int intr = enic_msix_rq_intr(enic, rq);
1519 unsigned int work_to_do = budget;
1520 unsigned int work_done;
1521 int err;
1522
1523 /* Service RQ
1524 */
1525
1526 work_done = vnic_cq_service(&enic->cq[cq],
1527 work_to_do, enic_rq_service, NULL);
1528
1529 /* Return intr event credits for this polling
1530 * cycle. An intr event is the completion of a
1531 * RQ packet.
1532 */
1533
1534 if (work_done > 0)
1535 vnic_intr_return_credits(&enic->intr[intr],
1536 work_done,
1537 0 /* don't unmask intr */,
1538 0 /* don't reset intr timer */);
1539
1540 err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1541
1542 /* Buffer allocation failed. Stay in polling mode
1543 * so we can try to fill the ring again.
1544 */
1545
1546 if (err)
1547 work_done = work_to_do;
1548
1549 if (work_done < work_to_do) {
1550
1551 /* Some work done, but not enough to stay in polling,
1552 * exit polling
1553 */
1554
1555 napi_complete(napi);
1556 vnic_intr_unmask(&enic->intr[intr]);
1557 }
1558
1559 return work_done;
1560 }
1561
1562 static void enic_notify_timer(unsigned long data)
1563 {
1564 struct enic *enic = (struct enic *)data;
1565
1566 enic_notify_check(enic);
1567
1568 mod_timer(&enic->notify_timer,
1569 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1570 }
1571
1572 static void enic_free_intr(struct enic *enic)
1573 {
1574 struct net_device *netdev = enic->netdev;
1575 unsigned int i;
1576
1577 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1578 case VNIC_DEV_INTR_MODE_INTX:
1579 free_irq(enic->pdev->irq, netdev);
1580 break;
1581 case VNIC_DEV_INTR_MODE_MSI:
1582 free_irq(enic->pdev->irq, enic);
1583 break;
1584 case VNIC_DEV_INTR_MODE_MSIX:
1585 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1586 if (enic->msix[i].requested)
1587 free_irq(enic->msix_entry[i].vector,
1588 enic->msix[i].devid);
1589 break;
1590 default:
1591 break;
1592 }
1593 }
1594
1595 static int enic_request_intr(struct enic *enic)
1596 {
1597 struct net_device *netdev = enic->netdev;
1598 unsigned int i, intr;
1599 int err = 0;
1600
1601 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1602
1603 case VNIC_DEV_INTR_MODE_INTX:
1604
1605 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1606 IRQF_SHARED, netdev->name, netdev);
1607 break;
1608
1609 case VNIC_DEV_INTR_MODE_MSI:
1610
1611 err = request_irq(enic->pdev->irq, enic_isr_msi,
1612 0, netdev->name, enic);
1613 break;
1614
1615 case VNIC_DEV_INTR_MODE_MSIX:
1616
1617 for (i = 0; i < enic->rq_count; i++) {
1618 intr = enic_msix_rq_intr(enic, i);
1619 sprintf(enic->msix[intr].devname,
1620 "%.11s-rx-%d", netdev->name, i);
1621 enic->msix[intr].isr = enic_isr_msix_rq;
1622 enic->msix[intr].devid = &enic->napi[i];
1623 }
1624
1625 for (i = 0; i < enic->wq_count; i++) {
1626 intr = enic_msix_wq_intr(enic, i);
1627 sprintf(enic->msix[intr].devname,
1628 "%.11s-tx-%d", netdev->name, i);
1629 enic->msix[intr].isr = enic_isr_msix_wq;
1630 enic->msix[intr].devid = enic;
1631 }
1632
1633 intr = enic_msix_err_intr(enic);
1634 sprintf(enic->msix[intr].devname,
1635 "%.11s-err", netdev->name);
1636 enic->msix[intr].isr = enic_isr_msix_err;
1637 enic->msix[intr].devid = enic;
1638
1639 intr = enic_msix_notify_intr(enic);
1640 sprintf(enic->msix[intr].devname,
1641 "%.11s-notify", netdev->name);
1642 enic->msix[intr].isr = enic_isr_msix_notify;
1643 enic->msix[intr].devid = enic;
1644
1645 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1646 enic->msix[i].requested = 0;
1647
1648 for (i = 0; i < enic->intr_count; i++) {
1649 err = request_irq(enic->msix_entry[i].vector,
1650 enic->msix[i].isr, 0,
1651 enic->msix[i].devname,
1652 enic->msix[i].devid);
1653 if (err) {
1654 enic_free_intr(enic);
1655 break;
1656 }
1657 enic->msix[i].requested = 1;
1658 }
1659
1660 break;
1661
1662 default:
1663 break;
1664 }
1665
1666 return err;
1667 }
1668
1669 static void enic_synchronize_irqs(struct enic *enic)
1670 {
1671 unsigned int i;
1672
1673 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1674 case VNIC_DEV_INTR_MODE_INTX:
1675 case VNIC_DEV_INTR_MODE_MSI:
1676 synchronize_irq(enic->pdev->irq);
1677 break;
1678 case VNIC_DEV_INTR_MODE_MSIX:
1679 for (i = 0; i < enic->intr_count; i++)
1680 synchronize_irq(enic->msix_entry[i].vector);
1681 break;
1682 default:
1683 break;
1684 }
1685 }
1686
1687 static int enic_dev_notify_set(struct enic *enic)
1688 {
1689 int err;
1690
1691 spin_lock(&enic->devcmd_lock);
1692 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1693 case VNIC_DEV_INTR_MODE_INTX:
1694 err = vnic_dev_notify_set(enic->vdev,
1695 enic_legacy_notify_intr());
1696 break;
1697 case VNIC_DEV_INTR_MODE_MSIX:
1698 err = vnic_dev_notify_set(enic->vdev,
1699 enic_msix_notify_intr(enic));
1700 break;
1701 default:
1702 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1703 break;
1704 }
1705 spin_unlock(&enic->devcmd_lock);
1706
1707 return err;
1708 }
1709
1710 static void enic_notify_timer_start(struct enic *enic)
1711 {
1712 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1713 case VNIC_DEV_INTR_MODE_MSI:
1714 mod_timer(&enic->notify_timer, jiffies);
1715 break;
1716 default:
1717 /* Using intr for notification for INTx/MSI-X */
1718 break;
1719 };
1720 }
1721
1722 /* rtnl lock is held, process context */
1723 static int enic_open(struct net_device *netdev)
1724 {
1725 struct enic *enic = netdev_priv(netdev);
1726 unsigned int i;
1727 int err;
1728
1729 err = enic_request_intr(enic);
1730 if (err) {
1731 netdev_err(netdev, "Unable to request irq.\n");
1732 return err;
1733 }
1734
1735 err = enic_dev_notify_set(enic);
1736 if (err) {
1737 netdev_err(netdev,
1738 "Failed to alloc notify buffer, aborting.\n");
1739 goto err_out_free_intr;
1740 }
1741
1742 for (i = 0; i < enic->rq_count; i++) {
1743 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1744 /* Need at least one buffer on ring to get going */
1745 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1746 netdev_err(netdev, "Unable to alloc receive buffers\n");
1747 err = -ENOMEM;
1748 goto err_out_notify_unset;
1749 }
1750 }
1751
1752 for (i = 0; i < enic->wq_count; i++)
1753 vnic_wq_enable(&enic->wq[i]);
1754 for (i = 0; i < enic->rq_count; i++)
1755 vnic_rq_enable(&enic->rq[i]);
1756
1757 if (enic_is_dynamic(enic) && !is_zero_ether_addr(enic->pp.mac_addr))
1758 enic_dev_add_addr(enic, enic->pp.mac_addr);
1759 else
1760 enic_dev_add_station_addr(enic);
1761 enic_set_rx_mode(netdev);
1762
1763 netif_wake_queue(netdev);
1764
1765 for (i = 0; i < enic->rq_count; i++)
1766 napi_enable(&enic->napi[i]);
1767
1768 enic_dev_enable(enic);
1769
1770 for (i = 0; i < enic->intr_count; i++)
1771 vnic_intr_unmask(&enic->intr[i]);
1772
1773 enic_notify_timer_start(enic);
1774
1775 return 0;
1776
1777 err_out_notify_unset:
1778 enic_dev_notify_unset(enic);
1779 err_out_free_intr:
1780 enic_free_intr(enic);
1781
1782 return err;
1783 }
1784
1785 /* rtnl lock is held, process context */
1786 static int enic_stop(struct net_device *netdev)
1787 {
1788 struct enic *enic = netdev_priv(netdev);
1789 unsigned int i;
1790 int err;
1791
1792 for (i = 0; i < enic->intr_count; i++) {
1793 vnic_intr_mask(&enic->intr[i]);
1794 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1795 }
1796
1797 enic_synchronize_irqs(enic);
1798
1799 del_timer_sync(&enic->notify_timer);
1800
1801 enic_dev_disable(enic);
1802
1803 for (i = 0; i < enic->rq_count; i++)
1804 napi_disable(&enic->napi[i]);
1805
1806 netif_carrier_off(netdev);
1807 netif_tx_disable(netdev);
1808 if (enic_is_dynamic(enic) && !is_zero_ether_addr(enic->pp.mac_addr))
1809 enic_dev_del_addr(enic, enic->pp.mac_addr);
1810 else
1811 enic_dev_del_station_addr(enic);
1812
1813 for (i = 0; i < enic->wq_count; i++) {
1814 err = vnic_wq_disable(&enic->wq[i]);
1815 if (err)
1816 return err;
1817 }
1818 for (i = 0; i < enic->rq_count; i++) {
1819 err = vnic_rq_disable(&enic->rq[i]);
1820 if (err)
1821 return err;
1822 }
1823
1824 enic_dev_notify_unset(enic);
1825 enic_free_intr(enic);
1826
1827 for (i = 0; i < enic->wq_count; i++)
1828 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1829 for (i = 0; i < enic->rq_count; i++)
1830 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1831 for (i = 0; i < enic->cq_count; i++)
1832 vnic_cq_clean(&enic->cq[i]);
1833 for (i = 0; i < enic->intr_count; i++)
1834 vnic_intr_clean(&enic->intr[i]);
1835
1836 return 0;
1837 }
1838
1839 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1840 {
1841 struct enic *enic = netdev_priv(netdev);
1842 int running = netif_running(netdev);
1843
1844 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1845 return -EINVAL;
1846
1847 if (running)
1848 enic_stop(netdev);
1849
1850 netdev->mtu = new_mtu;
1851
1852 if (netdev->mtu > enic->port_mtu)
1853 netdev_warn(netdev,
1854 "interface MTU (%d) set higher than port MTU (%d)\n",
1855 netdev->mtu, enic->port_mtu);
1856
1857 if (running)
1858 enic_open(netdev);
1859
1860 return 0;
1861 }
1862
1863 #ifdef CONFIG_NET_POLL_CONTROLLER
1864 static void enic_poll_controller(struct net_device *netdev)
1865 {
1866 struct enic *enic = netdev_priv(netdev);
1867 struct vnic_dev *vdev = enic->vdev;
1868 unsigned int i, intr;
1869
1870 switch (vnic_dev_get_intr_mode(vdev)) {
1871 case VNIC_DEV_INTR_MODE_MSIX:
1872 for (i = 0; i < enic->rq_count; i++) {
1873 intr = enic_msix_rq_intr(enic, i);
1874 enic_isr_msix_rq(enic->msix_entry[intr].vector,
1875 &enic->napi[i]);
1876 }
1877 intr = enic_msix_wq_intr(enic, i);
1878 enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
1879 break;
1880 case VNIC_DEV_INTR_MODE_MSI:
1881 enic_isr_msi(enic->pdev->irq, enic);
1882 break;
1883 case VNIC_DEV_INTR_MODE_INTX:
1884 enic_isr_legacy(enic->pdev->irq, netdev);
1885 break;
1886 default:
1887 break;
1888 }
1889 }
1890 #endif
1891
1892 static int enic_dev_wait(struct vnic_dev *vdev,
1893 int (*start)(struct vnic_dev *, int),
1894 int (*finished)(struct vnic_dev *, int *),
1895 int arg)
1896 {
1897 unsigned long time;
1898 int done;
1899 int err;
1900
1901 BUG_ON(in_interrupt());
1902
1903 err = start(vdev, arg);
1904 if (err)
1905 return err;
1906
1907 /* Wait for func to complete...2 seconds max
1908 */
1909
1910 time = jiffies + (HZ * 2);
1911 do {
1912
1913 err = finished(vdev, &done);
1914 if (err)
1915 return err;
1916
1917 if (done)
1918 return 0;
1919
1920 schedule_timeout_uninterruptible(HZ / 10);
1921
1922 } while (time_after(time, jiffies));
1923
1924 return -ETIMEDOUT;
1925 }
1926
1927 static int enic_dev_open(struct enic *enic)
1928 {
1929 int err;
1930
1931 err = enic_dev_wait(enic->vdev, vnic_dev_open,
1932 vnic_dev_open_done, 0);
1933 if (err)
1934 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1935 err);
1936
1937 return err;
1938 }
1939
1940 static int enic_dev_hang_reset(struct enic *enic)
1941 {
1942 int err;
1943
1944 err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1945 vnic_dev_hang_reset_done, 0);
1946 if (err)
1947 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1948 err);
1949
1950 return err;
1951 }
1952
1953 static int enic_set_rsskey(struct enic *enic)
1954 {
1955 dma_addr_t rss_key_buf_pa;
1956 union vnic_rss_key *rss_key_buf_va = NULL;
1957 union vnic_rss_key rss_key = {
1958 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1959 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1960 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1961 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1962 };
1963 int err;
1964
1965 rss_key_buf_va = pci_alloc_consistent(enic->pdev,
1966 sizeof(union vnic_rss_key), &rss_key_buf_pa);
1967 if (!rss_key_buf_va)
1968 return -ENOMEM;
1969
1970 memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
1971
1972 spin_lock(&enic->devcmd_lock);
1973 err = enic_set_rss_key(enic,
1974 rss_key_buf_pa,
1975 sizeof(union vnic_rss_key));
1976 spin_unlock(&enic->devcmd_lock);
1977
1978 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1979 rss_key_buf_va, rss_key_buf_pa);
1980
1981 return err;
1982 }
1983
1984 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1985 {
1986 dma_addr_t rss_cpu_buf_pa;
1987 union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1988 unsigned int i;
1989 int err;
1990
1991 rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1992 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1993 if (!rss_cpu_buf_va)
1994 return -ENOMEM;
1995
1996 for (i = 0; i < (1 << rss_hash_bits); i++)
1997 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1998
1999 spin_lock(&enic->devcmd_lock);
2000 err = enic_set_rss_cpu(enic,
2001 rss_cpu_buf_pa,
2002 sizeof(union vnic_rss_cpu));
2003 spin_unlock(&enic->devcmd_lock);
2004
2005 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
2006 rss_cpu_buf_va, rss_cpu_buf_pa);
2007
2008 return err;
2009 }
2010
2011 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
2012 u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
2013 {
2014 const u8 tso_ipid_split_en = 0;
2015 const u8 ig_vlan_strip_en = 1;
2016 int err;
2017
2018 /* Enable VLAN tag stripping.
2019 */
2020
2021 spin_lock(&enic->devcmd_lock);
2022 err = enic_set_nic_cfg(enic,
2023 rss_default_cpu, rss_hash_type,
2024 rss_hash_bits, rss_base_cpu,
2025 rss_enable, tso_ipid_split_en,
2026 ig_vlan_strip_en);
2027 spin_unlock(&enic->devcmd_lock);
2028
2029 return err;
2030 }
2031
2032 static int enic_set_rss_nic_cfg(struct enic *enic)
2033 {
2034 struct device *dev = enic_get_dev(enic);
2035 const u8 rss_default_cpu = 0;
2036 const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
2037 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
2038 NIC_CFG_RSS_HASH_TYPE_IPV6 |
2039 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
2040 const u8 rss_hash_bits = 7;
2041 const u8 rss_base_cpu = 0;
2042 u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
2043
2044 if (rss_enable) {
2045 if (!enic_set_rsskey(enic)) {
2046 if (enic_set_rsscpu(enic, rss_hash_bits)) {
2047 rss_enable = 0;
2048 dev_warn(dev, "RSS disabled, "
2049 "Failed to set RSS cpu indirection table.");
2050 }
2051 } else {
2052 rss_enable = 0;
2053 dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
2054 }
2055 }
2056
2057 return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
2058 rss_hash_bits, rss_base_cpu, rss_enable);
2059 }
2060
2061 static void enic_reset(struct work_struct *work)
2062 {
2063 struct enic *enic = container_of(work, struct enic, reset);
2064
2065 if (!netif_running(enic->netdev))
2066 return;
2067
2068 rtnl_lock();
2069
2070 enic_dev_hang_notify(enic);
2071 enic_stop(enic->netdev);
2072 enic_dev_hang_reset(enic);
2073 enic_reset_addr_lists(enic);
2074 enic_init_vnic_resources(enic);
2075 enic_set_rss_nic_cfg(enic);
2076 enic_dev_set_ig_vlan_rewrite_mode(enic);
2077 enic_open(enic->netdev);
2078
2079 rtnl_unlock();
2080 }
2081
2082 static int enic_set_intr_mode(struct enic *enic)
2083 {
2084 unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
2085 unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
2086 unsigned int i;
2087
2088 /* Set interrupt mode (INTx, MSI, MSI-X) depending
2089 * on system capabilities.
2090 *
2091 * Try MSI-X first
2092 *
2093 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2094 * (the second to last INTR is used for WQ/RQ errors)
2095 * (the last INTR is used for notifications)
2096 */
2097
2098 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2099 for (i = 0; i < n + m + 2; i++)
2100 enic->msix_entry[i].entry = i;
2101
2102 /* Use multiple RQs if RSS is enabled
2103 */
2104
2105 if (ENIC_SETTING(enic, RSS) &&
2106 enic->config.intr_mode < 1 &&
2107 enic->rq_count >= n &&
2108 enic->wq_count >= m &&
2109 enic->cq_count >= n + m &&
2110 enic->intr_count >= n + m + 2) {
2111
2112 if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
2113
2114 enic->rq_count = n;
2115 enic->wq_count = m;
2116 enic->cq_count = n + m;
2117 enic->intr_count = n + m + 2;
2118
2119 vnic_dev_set_intr_mode(enic->vdev,
2120 VNIC_DEV_INTR_MODE_MSIX);
2121
2122 return 0;
2123 }
2124 }
2125
2126 if (enic->config.intr_mode < 1 &&
2127 enic->rq_count >= 1 &&
2128 enic->wq_count >= m &&
2129 enic->cq_count >= 1 + m &&
2130 enic->intr_count >= 1 + m + 2) {
2131 if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
2132
2133 enic->rq_count = 1;
2134 enic->wq_count = m;
2135 enic->cq_count = 1 + m;
2136 enic->intr_count = 1 + m + 2;
2137
2138 vnic_dev_set_intr_mode(enic->vdev,
2139 VNIC_DEV_INTR_MODE_MSIX);
2140
2141 return 0;
2142 }
2143 }
2144
2145 /* Next try MSI
2146 *
2147 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2148 */
2149
2150 if (enic->config.intr_mode < 2 &&
2151 enic->rq_count >= 1 &&
2152 enic->wq_count >= 1 &&
2153 enic->cq_count >= 2 &&
2154 enic->intr_count >= 1 &&
2155 !pci_enable_msi(enic->pdev)) {
2156
2157 enic->rq_count = 1;
2158 enic->wq_count = 1;
2159 enic->cq_count = 2;
2160 enic->intr_count = 1;
2161
2162 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2163
2164 return 0;
2165 }
2166
2167 /* Next try INTx
2168 *
2169 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2170 * (the first INTR is used for WQ/RQ)
2171 * (the second INTR is used for WQ/RQ errors)
2172 * (the last INTR is used for notifications)
2173 */
2174
2175 if (enic->config.intr_mode < 3 &&
2176 enic->rq_count >= 1 &&
2177 enic->wq_count >= 1 &&
2178 enic->cq_count >= 2 &&
2179 enic->intr_count >= 3) {
2180
2181 enic->rq_count = 1;
2182 enic->wq_count = 1;
2183 enic->cq_count = 2;
2184 enic->intr_count = 3;
2185
2186 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2187
2188 return 0;
2189 }
2190
2191 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2192
2193 return -EINVAL;
2194 }
2195
2196 static void enic_clear_intr_mode(struct enic *enic)
2197 {
2198 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2199 case VNIC_DEV_INTR_MODE_MSIX:
2200 pci_disable_msix(enic->pdev);
2201 break;
2202 case VNIC_DEV_INTR_MODE_MSI:
2203 pci_disable_msi(enic->pdev);
2204 break;
2205 default:
2206 break;
2207 }
2208
2209 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2210 }
2211
2212 static const struct net_device_ops enic_netdev_dynamic_ops = {
2213 .ndo_open = enic_open,
2214 .ndo_stop = enic_stop,
2215 .ndo_start_xmit = enic_hard_start_xmit,
2216 .ndo_get_stats = enic_get_stats,
2217 .ndo_validate_addr = eth_validate_addr,
2218 .ndo_set_rx_mode = enic_set_rx_mode,
2219 .ndo_set_multicast_list = enic_set_rx_mode,
2220 .ndo_set_mac_address = enic_set_mac_address_dynamic,
2221 .ndo_change_mtu = enic_change_mtu,
2222 .ndo_vlan_rx_register = enic_vlan_rx_register,
2223 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2224 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2225 .ndo_tx_timeout = enic_tx_timeout,
2226 .ndo_set_vf_port = enic_set_vf_port,
2227 .ndo_get_vf_port = enic_get_vf_port,
2228 .ndo_set_vf_mac = enic_set_vf_mac,
2229 #ifdef CONFIG_NET_POLL_CONTROLLER
2230 .ndo_poll_controller = enic_poll_controller,
2231 #endif
2232 };
2233
2234 static const struct net_device_ops enic_netdev_ops = {
2235 .ndo_open = enic_open,
2236 .ndo_stop = enic_stop,
2237 .ndo_start_xmit = enic_hard_start_xmit,
2238 .ndo_get_stats = enic_get_stats,
2239 .ndo_validate_addr = eth_validate_addr,
2240 .ndo_set_mac_address = enic_set_mac_address,
2241 .ndo_set_rx_mode = enic_set_rx_mode,
2242 .ndo_set_multicast_list = enic_set_rx_mode,
2243 .ndo_change_mtu = enic_change_mtu,
2244 .ndo_vlan_rx_register = enic_vlan_rx_register,
2245 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2246 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2247 .ndo_tx_timeout = enic_tx_timeout,
2248 #ifdef CONFIG_NET_POLL_CONTROLLER
2249 .ndo_poll_controller = enic_poll_controller,
2250 #endif
2251 };
2252
2253 static void enic_dev_deinit(struct enic *enic)
2254 {
2255 unsigned int i;
2256
2257 for (i = 0; i < enic->rq_count; i++)
2258 netif_napi_del(&enic->napi[i]);
2259
2260 enic_free_vnic_resources(enic);
2261 enic_clear_intr_mode(enic);
2262 }
2263
2264 static int enic_dev_init(struct enic *enic)
2265 {
2266 struct device *dev = enic_get_dev(enic);
2267 struct net_device *netdev = enic->netdev;
2268 unsigned int i;
2269 int err;
2270
2271 /* Get vNIC configuration
2272 */
2273
2274 err = enic_get_vnic_config(enic);
2275 if (err) {
2276 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2277 return err;
2278 }
2279
2280 /* Get available resource counts
2281 */
2282
2283 enic_get_res_counts(enic);
2284
2285 /* Set interrupt mode based on resource counts and system
2286 * capabilities
2287 */
2288
2289 err = enic_set_intr_mode(enic);
2290 if (err) {
2291 dev_err(dev, "Failed to set intr mode based on resource "
2292 "counts and system capabilities, aborting\n");
2293 return err;
2294 }
2295
2296 /* Allocate and configure vNIC resources
2297 */
2298
2299 err = enic_alloc_vnic_resources(enic);
2300 if (err) {
2301 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2302 goto err_out_free_vnic_resources;
2303 }
2304
2305 enic_init_vnic_resources(enic);
2306
2307 err = enic_set_rss_nic_cfg(enic);
2308 if (err) {
2309 dev_err(dev, "Failed to config nic, aborting\n");
2310 goto err_out_free_vnic_resources;
2311 }
2312
2313 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2314 default:
2315 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2316 break;
2317 case VNIC_DEV_INTR_MODE_MSIX:
2318 for (i = 0; i < enic->rq_count; i++)
2319 netif_napi_add(netdev, &enic->napi[i],
2320 enic_poll_msix, 64);
2321 break;
2322 }
2323
2324 return 0;
2325
2326 err_out_free_vnic_resources:
2327 enic_clear_intr_mode(enic);
2328 enic_free_vnic_resources(enic);
2329
2330 return err;
2331 }
2332
2333 static void enic_iounmap(struct enic *enic)
2334 {
2335 unsigned int i;
2336
2337 for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2338 if (enic->bar[i].vaddr)
2339 iounmap(enic->bar[i].vaddr);
2340 }
2341
2342 static int __devinit enic_probe(struct pci_dev *pdev,
2343 const struct pci_device_id *ent)
2344 {
2345 struct device *dev = &pdev->dev;
2346 struct net_device *netdev;
2347 struct enic *enic;
2348 int using_dac = 0;
2349 unsigned int i;
2350 int err;
2351
2352 /* Allocate net device structure and initialize. Private
2353 * instance data is initialized to zero.
2354 */
2355
2356 netdev = alloc_etherdev(sizeof(struct enic));
2357 if (!netdev) {
2358 pr_err("Etherdev alloc failed, aborting\n");
2359 return -ENOMEM;
2360 }
2361
2362 pci_set_drvdata(pdev, netdev);
2363
2364 SET_NETDEV_DEV(netdev, &pdev->dev);
2365
2366 enic = netdev_priv(netdev);
2367 enic->netdev = netdev;
2368 enic->pdev = pdev;
2369
2370 /* Setup PCI resources
2371 */
2372
2373 err = pci_enable_device_mem(pdev);
2374 if (err) {
2375 dev_err(dev, "Cannot enable PCI device, aborting\n");
2376 goto err_out_free_netdev;
2377 }
2378
2379 err = pci_request_regions(pdev, DRV_NAME);
2380 if (err) {
2381 dev_err(dev, "Cannot request PCI regions, aborting\n");
2382 goto err_out_disable_device;
2383 }
2384
2385 pci_set_master(pdev);
2386
2387 /* Query PCI controller on system for DMA addressing
2388 * limitation for the device. Try 40-bit first, and
2389 * fail to 32-bit.
2390 */
2391
2392 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2393 if (err) {
2394 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2395 if (err) {
2396 dev_err(dev, "No usable DMA configuration, aborting\n");
2397 goto err_out_release_regions;
2398 }
2399 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2400 if (err) {
2401 dev_err(dev, "Unable to obtain %u-bit DMA "
2402 "for consistent allocations, aborting\n", 32);
2403 goto err_out_release_regions;
2404 }
2405 } else {
2406 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2407 if (err) {
2408 dev_err(dev, "Unable to obtain %u-bit DMA "
2409 "for consistent allocations, aborting\n", 40);
2410 goto err_out_release_regions;
2411 }
2412 using_dac = 1;
2413 }
2414
2415 /* Map vNIC resources from BAR0-5
2416 */
2417
2418 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2419 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2420 continue;
2421 enic->bar[i].len = pci_resource_len(pdev, i);
2422 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2423 if (!enic->bar[i].vaddr) {
2424 dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2425 err = -ENODEV;
2426 goto err_out_iounmap;
2427 }
2428 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2429 }
2430
2431 /* Register vNIC device
2432 */
2433
2434 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2435 ARRAY_SIZE(enic->bar));
2436 if (!enic->vdev) {
2437 dev_err(dev, "vNIC registration failed, aborting\n");
2438 err = -ENODEV;
2439 goto err_out_iounmap;
2440 }
2441
2442 /* Issue device open to get device in known state
2443 */
2444
2445 err = enic_dev_open(enic);
2446 if (err) {
2447 dev_err(dev, "vNIC dev open failed, aborting\n");
2448 goto err_out_vnic_unregister;
2449 }
2450
2451 /* Setup devcmd lock
2452 */
2453
2454 spin_lock_init(&enic->devcmd_lock);
2455
2456 /*
2457 * Set ingress vlan rewrite mode before vnic initialization
2458 */
2459
2460 err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2461 if (err) {
2462 dev_err(dev,
2463 "Failed to set ingress vlan rewrite mode, aborting.\n");
2464 goto err_out_dev_close;
2465 }
2466
2467 /* Issue device init to initialize the vnic-to-switch link.
2468 * We'll start with carrier off and wait for link UP
2469 * notification later to turn on carrier. We don't need
2470 * to wait here for the vnic-to-switch link initialization
2471 * to complete; link UP notification is the indication that
2472 * the process is complete.
2473 */
2474
2475 netif_carrier_off(netdev);
2476
2477 /* Do not call dev_init for a dynamic vnic.
2478 * For a dynamic vnic, init_prov_info will be
2479 * called later by an upper layer.
2480 */
2481
2482 if (!enic_is_dynamic(enic)) {
2483 err = vnic_dev_init(enic->vdev, 0);
2484 if (err) {
2485 dev_err(dev, "vNIC dev init failed, aborting\n");
2486 goto err_out_dev_close;
2487 }
2488 }
2489
2490 err = enic_dev_init(enic);
2491 if (err) {
2492 dev_err(dev, "Device initialization failed, aborting\n");
2493 goto err_out_dev_close;
2494 }
2495
2496 /* Setup notification timer, HW reset task, and wq locks
2497 */
2498
2499 init_timer(&enic->notify_timer);
2500 enic->notify_timer.function = enic_notify_timer;
2501 enic->notify_timer.data = (unsigned long)enic;
2502
2503 INIT_WORK(&enic->reset, enic_reset);
2504
2505 for (i = 0; i < enic->wq_count; i++)
2506 spin_lock_init(&enic->wq_lock[i]);
2507
2508 /* Register net device
2509 */
2510
2511 enic->port_mtu = enic->config.mtu;
2512 (void)enic_change_mtu(netdev, enic->port_mtu);
2513
2514 err = enic_set_mac_addr(netdev, enic->mac_addr);
2515 if (err) {
2516 dev_err(dev, "Invalid MAC address, aborting\n");
2517 goto err_out_dev_deinit;
2518 }
2519
2520 enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2521 enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2522
2523 if (enic_is_dynamic(enic))
2524 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2525 else
2526 netdev->netdev_ops = &enic_netdev_ops;
2527
2528 netdev->watchdog_timeo = 2 * HZ;
2529 netdev->ethtool_ops = &enic_ethtool_ops;
2530
2531 netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2532 if (ENIC_SETTING(enic, LOOP)) {
2533 netdev->features &= ~NETIF_F_HW_VLAN_TX;
2534 enic->loop_enable = 1;
2535 enic->loop_tag = enic->config.loop_tag;
2536 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2537 }
2538 if (ENIC_SETTING(enic, TXCSUM))
2539 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2540 if (ENIC_SETTING(enic, TSO))
2541 netdev->features |= NETIF_F_TSO |
2542 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2543 if (ENIC_SETTING(enic, LRO))
2544 netdev->features |= NETIF_F_GRO;
2545 if (using_dac)
2546 netdev->features |= NETIF_F_HIGHDMA;
2547
2548 enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
2549
2550 err = register_netdev(netdev);
2551 if (err) {
2552 dev_err(dev, "Cannot register net device, aborting\n");
2553 goto err_out_dev_deinit;
2554 }
2555
2556 return 0;
2557
2558 err_out_dev_deinit:
2559 enic_dev_deinit(enic);
2560 err_out_dev_close:
2561 vnic_dev_close(enic->vdev);
2562 err_out_vnic_unregister:
2563 vnic_dev_unregister(enic->vdev);
2564 err_out_iounmap:
2565 enic_iounmap(enic);
2566 err_out_release_regions:
2567 pci_release_regions(pdev);
2568 err_out_disable_device:
2569 pci_disable_device(pdev);
2570 err_out_free_netdev:
2571 pci_set_drvdata(pdev, NULL);
2572 free_netdev(netdev);
2573
2574 return err;
2575 }
2576
2577 static void __devexit enic_remove(struct pci_dev *pdev)
2578 {
2579 struct net_device *netdev = pci_get_drvdata(pdev);
2580
2581 if (netdev) {
2582 struct enic *enic = netdev_priv(netdev);
2583
2584 cancel_work_sync(&enic->reset);
2585 unregister_netdev(netdev);
2586 enic_dev_deinit(enic);
2587 vnic_dev_close(enic->vdev);
2588 vnic_dev_unregister(enic->vdev);
2589 enic_iounmap(enic);
2590 pci_release_regions(pdev);
2591 pci_disable_device(pdev);
2592 pci_set_drvdata(pdev, NULL);
2593 free_netdev(netdev);
2594 }
2595 }
2596
2597 static struct pci_driver enic_driver = {
2598 .name = DRV_NAME,
2599 .id_table = enic_id_table,
2600 .probe = enic_probe,
2601 .remove = __devexit_p(enic_remove),
2602 };
2603
2604 static int __init enic_init_module(void)
2605 {
2606 pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2607
2608 return pci_register_driver(&enic_driver);
2609 }
2610
2611 static void __exit enic_cleanup_module(void)
2612 {
2613 pci_unregister_driver(&enic_driver);
2614 }
2615
2616 module_init(enic_init_module);
2617 module_exit(enic_cleanup_module);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree