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enic: use netdev_alloc_skb
[linux-2.6.git] / drivers / net / enic / enic_main.c
blob73f01075287d1290fecad3a9ad755718959563de
1 /*
2 * Copyright 2008 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 <net/ip6_checksum.h>
38
39 #include "cq_enet_desc.h"
40 #include "vnic_dev.h"
41 #include "vnic_intr.h"
42 #include "vnic_stats.h"
43 #include "enic_res.h"
44 #include "enic.h"
45
46 #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
47 #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS)
48 #define MAX_TSO (1 << 16)
49 #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
50
51 #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */
52
53 /* Supported devices */
54 static struct pci_device_id enic_id_table[] = {
55 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
56 { 0, } /* end of table */
57 };
58
59 MODULE_DESCRIPTION(DRV_DESCRIPTION);
60 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
61 MODULE_LICENSE("GPL");
62 MODULE_VERSION(DRV_VERSION);
63 MODULE_DEVICE_TABLE(pci, enic_id_table);
64
65 struct enic_stat {
66 char name[ETH_GSTRING_LEN];
67 unsigned int offset;
68 };
69
70 #define ENIC_TX_STAT(stat) \
71 { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
72 #define ENIC_RX_STAT(stat) \
73 { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
74
75 static const struct enic_stat enic_tx_stats[] = {
76 ENIC_TX_STAT(tx_frames_ok),
77 ENIC_TX_STAT(tx_unicast_frames_ok),
78 ENIC_TX_STAT(tx_multicast_frames_ok),
79 ENIC_TX_STAT(tx_broadcast_frames_ok),
80 ENIC_TX_STAT(tx_bytes_ok),
81 ENIC_TX_STAT(tx_unicast_bytes_ok),
82 ENIC_TX_STAT(tx_multicast_bytes_ok),
83 ENIC_TX_STAT(tx_broadcast_bytes_ok),
84 ENIC_TX_STAT(tx_drops),
85 ENIC_TX_STAT(tx_errors),
86 ENIC_TX_STAT(tx_tso),
87 };
88
89 static const struct enic_stat enic_rx_stats[] = {
90 ENIC_RX_STAT(rx_frames_ok),
91 ENIC_RX_STAT(rx_frames_total),
92 ENIC_RX_STAT(rx_unicast_frames_ok),
93 ENIC_RX_STAT(rx_multicast_frames_ok),
94 ENIC_RX_STAT(rx_broadcast_frames_ok),
95 ENIC_RX_STAT(rx_bytes_ok),
96 ENIC_RX_STAT(rx_unicast_bytes_ok),
97 ENIC_RX_STAT(rx_multicast_bytes_ok),
98 ENIC_RX_STAT(rx_broadcast_bytes_ok),
99 ENIC_RX_STAT(rx_drop),
100 ENIC_RX_STAT(rx_no_bufs),
101 ENIC_RX_STAT(rx_errors),
102 ENIC_RX_STAT(rx_rss),
103 ENIC_RX_STAT(rx_crc_errors),
104 ENIC_RX_STAT(rx_frames_64),
105 ENIC_RX_STAT(rx_frames_127),
106 ENIC_RX_STAT(rx_frames_255),
107 ENIC_RX_STAT(rx_frames_511),
108 ENIC_RX_STAT(rx_frames_1023),
109 ENIC_RX_STAT(rx_frames_1518),
110 ENIC_RX_STAT(rx_frames_to_max),
111 };
112
113 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
114 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
115
116 static int enic_get_settings(struct net_device *netdev,
117 struct ethtool_cmd *ecmd)
118 {
119 struct enic *enic = netdev_priv(netdev);
120
121 ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
122 ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
123 ecmd->port = PORT_FIBRE;
124 ecmd->transceiver = XCVR_EXTERNAL;
125
126 if (netif_carrier_ok(netdev)) {
127 ecmd->speed = vnic_dev_port_speed(enic->vdev);
128 ecmd->duplex = DUPLEX_FULL;
129 } else {
130 ecmd->speed = -1;
131 ecmd->duplex = -1;
132 }
133
134 ecmd->autoneg = AUTONEG_DISABLE;
135
136 return 0;
137 }
138
139 static void enic_get_drvinfo(struct net_device *netdev,
140 struct ethtool_drvinfo *drvinfo)
141 {
142 struct enic *enic = netdev_priv(netdev);
143 struct vnic_devcmd_fw_info *fw_info;
144
145 spin_lock(&enic->devcmd_lock);
146 vnic_dev_fw_info(enic->vdev, &fw_info);
147 spin_unlock(&enic->devcmd_lock);
148
149 strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
150 strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
151 strncpy(drvinfo->fw_version, fw_info->fw_version,
152 sizeof(drvinfo->fw_version));
153 strncpy(drvinfo->bus_info, pci_name(enic->pdev),
154 sizeof(drvinfo->bus_info));
155 }
156
157 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
158 {
159 unsigned int i;
160
161 switch (stringset) {
162 case ETH_SS_STATS:
163 for (i = 0; i < enic_n_tx_stats; i++) {
164 memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
165 data += ETH_GSTRING_LEN;
166 }
167 for (i = 0; i < enic_n_rx_stats; i++) {
168 memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
169 data += ETH_GSTRING_LEN;
170 }
171 break;
172 }
173 }
174
175 static int enic_get_sset_count(struct net_device *netdev, int sset)
176 {
177 switch (sset) {
178 case ETH_SS_STATS:
179 return enic_n_tx_stats + enic_n_rx_stats;
180 default:
181 return -EOPNOTSUPP;
182 }
183 }
184
185 static void enic_get_ethtool_stats(struct net_device *netdev,
186 struct ethtool_stats *stats, u64 *data)
187 {
188 struct enic *enic = netdev_priv(netdev);
189 struct vnic_stats *vstats;
190 unsigned int i;
191
192 spin_lock(&enic->devcmd_lock);
193 vnic_dev_stats_dump(enic->vdev, &vstats);
194 spin_unlock(&enic->devcmd_lock);
195
196 for (i = 0; i < enic_n_tx_stats; i++)
197 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
198 for (i = 0; i < enic_n_rx_stats; i++)
199 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
200 }
201
202 static u32 enic_get_rx_csum(struct net_device *netdev)
203 {
204 struct enic *enic = netdev_priv(netdev);
205 return enic->csum_rx_enabled;
206 }
207
208 static int enic_set_rx_csum(struct net_device *netdev, u32 data)
209 {
210 struct enic *enic = netdev_priv(netdev);
211
212 if (data && !ENIC_SETTING(enic, RXCSUM))
213 return -EINVAL;
214
215 enic->csum_rx_enabled = !!data;
216
217 return 0;
218 }
219
220 static int enic_set_tx_csum(struct net_device *netdev, u32 data)
221 {
222 struct enic *enic = netdev_priv(netdev);
223
224 if (data && !ENIC_SETTING(enic, TXCSUM))
225 return -EINVAL;
226
227 if (data)
228 netdev->features |= NETIF_F_HW_CSUM;
229 else
230 netdev->features &= ~NETIF_F_HW_CSUM;
231
232 return 0;
233 }
234
235 static int enic_set_tso(struct net_device *netdev, u32 data)
236 {
237 struct enic *enic = netdev_priv(netdev);
238
239 if (data && !ENIC_SETTING(enic, TSO))
240 return -EINVAL;
241
242 if (data)
243 netdev->features |=
244 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
245 else
246 netdev->features &=
247 ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN);
248
249 return 0;
250 }
251
252 static u32 enic_get_msglevel(struct net_device *netdev)
253 {
254 struct enic *enic = netdev_priv(netdev);
255 return enic->msg_enable;
256 }
257
258 static void enic_set_msglevel(struct net_device *netdev, u32 value)
259 {
260 struct enic *enic = netdev_priv(netdev);
261 enic->msg_enable = value;
262 }
263
264 static const struct ethtool_ops enic_ethtool_ops = {
265 .get_settings = enic_get_settings,
266 .get_drvinfo = enic_get_drvinfo,
267 .get_msglevel = enic_get_msglevel,
268 .set_msglevel = enic_set_msglevel,
269 .get_link = ethtool_op_get_link,
270 .get_strings = enic_get_strings,
271 .get_sset_count = enic_get_sset_count,
272 .get_ethtool_stats = enic_get_ethtool_stats,
273 .get_rx_csum = enic_get_rx_csum,
274 .set_rx_csum = enic_set_rx_csum,
275 .get_tx_csum = ethtool_op_get_tx_csum,
276 .set_tx_csum = enic_set_tx_csum,
277 .get_sg = ethtool_op_get_sg,
278 .set_sg = ethtool_op_set_sg,
279 .get_tso = ethtool_op_get_tso,
280 .set_tso = enic_set_tso,
281 .get_flags = ethtool_op_get_flags,
282 .set_flags = ethtool_op_set_flags,
283 };
284
285 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
286 {
287 struct enic *enic = vnic_dev_priv(wq->vdev);
288
289 if (buf->sop)
290 pci_unmap_single(enic->pdev, buf->dma_addr,
291 buf->len, PCI_DMA_TODEVICE);
292 else
293 pci_unmap_page(enic->pdev, buf->dma_addr,
294 buf->len, PCI_DMA_TODEVICE);
295
296 if (buf->os_buf)
297 dev_kfree_skb_any(buf->os_buf);
298 }
299
300 static void enic_wq_free_buf(struct vnic_wq *wq,
301 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
302 {
303 enic_free_wq_buf(wq, buf);
304 }
305
306 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
307 u8 type, u16 q_number, u16 completed_index, void *opaque)
308 {
309 struct enic *enic = vnic_dev_priv(vdev);
310
311 spin_lock(&enic->wq_lock[q_number]);
312
313 vnic_wq_service(&enic->wq[q_number], cq_desc,
314 completed_index, enic_wq_free_buf,
315 opaque);
316
317 if (netif_queue_stopped(enic->netdev) &&
318 vnic_wq_desc_avail(&enic->wq[q_number]) >=
319 (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
320 netif_wake_queue(enic->netdev);
321
322 spin_unlock(&enic->wq_lock[q_number]);
323
324 return 0;
325 }
326
327 static void enic_log_q_error(struct enic *enic)
328 {
329 unsigned int i;
330 u32 error_status;
331
332 for (i = 0; i < enic->wq_count; i++) {
333 error_status = vnic_wq_error_status(&enic->wq[i]);
334 if (error_status)
335 printk(KERN_ERR PFX "%s: WQ[%d] error_status %d\n",
336 enic->netdev->name, i, error_status);
337 }
338
339 for (i = 0; i < enic->rq_count; i++) {
340 error_status = vnic_rq_error_status(&enic->rq[i]);
341 if (error_status)
342 printk(KERN_ERR PFX "%s: RQ[%d] error_status %d\n",
343 enic->netdev->name, i, error_status);
344 }
345 }
346
347 static void enic_link_check(struct enic *enic)
348 {
349 int link_status = vnic_dev_link_status(enic->vdev);
350 int carrier_ok = netif_carrier_ok(enic->netdev);
351
352 if (link_status && !carrier_ok) {
353 printk(KERN_INFO PFX "%s: Link UP\n", enic->netdev->name);
354 netif_carrier_on(enic->netdev);
355 } else if (!link_status && carrier_ok) {
356 printk(KERN_INFO PFX "%s: Link DOWN\n", enic->netdev->name);
357 netif_carrier_off(enic->netdev);
358 }
359 }
360
361 static void enic_mtu_check(struct enic *enic)
362 {
363 u32 mtu = vnic_dev_mtu(enic->vdev);
364
365 if (mtu != enic->port_mtu) {
366 if (mtu < enic->netdev->mtu)
367 printk(KERN_WARNING PFX
368 "%s: interface MTU (%d) set higher "
369 "than switch port MTU (%d)\n",
370 enic->netdev->name, enic->netdev->mtu, mtu);
371 enic->port_mtu = mtu;
372 }
373 }
374
375 static void enic_msglvl_check(struct enic *enic)
376 {
377 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
378
379 if (msg_enable != enic->msg_enable) {
380 printk(KERN_INFO PFX "%s: msg lvl changed from 0x%x to 0x%x\n",
381 enic->netdev->name, enic->msg_enable, msg_enable);
382 enic->msg_enable = msg_enable;
383 }
384 }
385
386 static void enic_notify_check(struct enic *enic)
387 {
388 enic_msglvl_check(enic);
389 enic_mtu_check(enic);
390 enic_link_check(enic);
391 }
392
393 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
394
395 static irqreturn_t enic_isr_legacy(int irq, void *data)
396 {
397 struct net_device *netdev = data;
398 struct enic *enic = netdev_priv(netdev);
399 u32 pba;
400
401 vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]);
402
403 pba = vnic_intr_legacy_pba(enic->legacy_pba);
404 if (!pba) {
405 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
406 return IRQ_NONE; /* not our interrupt */
407 }
408
409 if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY)) {
410 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_NOTIFY]);
411 enic_notify_check(enic);
412 }
413
414 if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) {
415 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_ERR]);
416 enic_log_q_error(enic);
417 /* schedule recovery from WQ/RQ error */
418 schedule_work(&enic->reset);
419 return IRQ_HANDLED;
420 }
421
422 if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) {
423 if (napi_schedule_prep(&enic->napi))
424 __napi_schedule(&enic->napi);
425 } else {
426 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
427 }
428
429 return IRQ_HANDLED;
430 }
431
432 static irqreturn_t enic_isr_msi(int irq, void *data)
433 {
434 struct enic *enic = data;
435
436 /* With MSI, there is no sharing of interrupts, so this is
437 * our interrupt and there is no need to ack it. The device
438 * is not providing per-vector masking, so the OS will not
439 * write to PCI config space to mask/unmask the interrupt.
440 * We're using mask_on_assertion for MSI, so the device
441 * automatically masks the interrupt when the interrupt is
442 * generated. Later, when exiting polling, the interrupt
443 * will be unmasked (see enic_poll).
444 *
445 * Also, the device uses the same PCIe Traffic Class (TC)
446 * for Memory Write data and MSI, so there are no ordering
447 * issues; the MSI will always arrive at the Root Complex
448 * _after_ corresponding Memory Writes (i.e. descriptor
449 * writes).
450 */
451
452 napi_schedule(&enic->napi);
453
454 return IRQ_HANDLED;
455 }
456
457 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
458 {
459 struct enic *enic = data;
460
461 /* schedule NAPI polling for RQ cleanup */
462 napi_schedule(&enic->napi);
463
464 return IRQ_HANDLED;
465 }
466
467 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
468 {
469 struct enic *enic = data;
470 unsigned int wq_work_to_do = -1; /* no limit */
471 unsigned int wq_work_done;
472
473 wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
474 wq_work_to_do, enic_wq_service, NULL);
475
476 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ],
477 wq_work_done,
478 1 /* unmask intr */,
479 1 /* reset intr timer */);
480
481 return IRQ_HANDLED;
482 }
483
484 static irqreturn_t enic_isr_msix_err(int irq, void *data)
485 {
486 struct enic *enic = data;
487
488 vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_ERR]);
489
490 enic_log_q_error(enic);
491
492 /* schedule recovery from WQ/RQ error */
493 schedule_work(&enic->reset);
494
495 return IRQ_HANDLED;
496 }
497
498 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
499 {
500 struct enic *enic = data;
501
502 vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_NOTIFY]);
503 enic_notify_check(enic);
504
505 return IRQ_HANDLED;
506 }
507
508 static inline void enic_queue_wq_skb_cont(struct enic *enic,
509 struct vnic_wq *wq, struct sk_buff *skb,
510 unsigned int len_left)
511 {
512 skb_frag_t *frag;
513
514 /* Queue additional data fragments */
515 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
516 len_left -= frag->size;
517 enic_queue_wq_desc_cont(wq, skb,
518 pci_map_page(enic->pdev, frag->page,
519 frag->page_offset, frag->size,
520 PCI_DMA_TODEVICE),
521 frag->size,
522 (len_left == 0)); /* EOP? */
523 }
524 }
525
526 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
527 struct vnic_wq *wq, struct sk_buff *skb,
528 int vlan_tag_insert, unsigned int vlan_tag)
529 {
530 unsigned int head_len = skb_headlen(skb);
531 unsigned int len_left = skb->len - head_len;
532 int eop = (len_left == 0);
533
534 /* Queue the main skb fragment. The fragments are no larger
535 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
536 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
537 * per fragment is queued.
538 */
539 enic_queue_wq_desc(wq, skb,
540 pci_map_single(enic->pdev, skb->data,
541 head_len, PCI_DMA_TODEVICE),
542 head_len,
543 vlan_tag_insert, vlan_tag,
544 eop);
545
546 if (!eop)
547 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
548 }
549
550 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
551 struct vnic_wq *wq, struct sk_buff *skb,
552 int vlan_tag_insert, unsigned int vlan_tag)
553 {
554 unsigned int head_len = skb_headlen(skb);
555 unsigned int len_left = skb->len - head_len;
556 unsigned int hdr_len = skb_transport_offset(skb);
557 unsigned int csum_offset = hdr_len + skb->csum_offset;
558 int eop = (len_left == 0);
559
560 /* Queue the main skb fragment. The fragments are no larger
561 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
562 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
563 * per fragment is queued.
564 */
565 enic_queue_wq_desc_csum_l4(wq, skb,
566 pci_map_single(enic->pdev, skb->data,
567 head_len, PCI_DMA_TODEVICE),
568 head_len,
569 csum_offset,
570 hdr_len,
571 vlan_tag_insert, vlan_tag,
572 eop);
573
574 if (!eop)
575 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
576 }
577
578 static inline void enic_queue_wq_skb_tso(struct enic *enic,
579 struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
580 int vlan_tag_insert, unsigned int vlan_tag)
581 {
582 unsigned int frag_len_left = skb_headlen(skb);
583 unsigned int len_left = skb->len - frag_len_left;
584 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
585 int eop = (len_left == 0);
586 unsigned int len;
587 dma_addr_t dma_addr;
588 unsigned int offset = 0;
589 skb_frag_t *frag;
590
591 /* Preload TCP csum field with IP pseudo hdr calculated
592 * with IP length set to zero. HW will later add in length
593 * to each TCP segment resulting from the TSO.
594 */
595
596 if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
597 ip_hdr(skb)->check = 0;
598 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
599 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
600 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
601 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
602 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
603 }
604
605 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
606 * for the main skb fragment
607 */
608 while (frag_len_left) {
609 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
610 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
611 len, PCI_DMA_TODEVICE);
612 enic_queue_wq_desc_tso(wq, skb,
613 dma_addr,
614 len,
615 mss, hdr_len,
616 vlan_tag_insert, vlan_tag,
617 eop && (len == frag_len_left));
618 frag_len_left -= len;
619 offset += len;
620 }
621
622 if (eop)
623 return;
624
625 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
626 * for additional data fragments
627 */
628 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
629 len_left -= frag->size;
630 frag_len_left = frag->size;
631 offset = frag->page_offset;
632
633 while (frag_len_left) {
634 len = min(frag_len_left,
635 (unsigned int)WQ_ENET_MAX_DESC_LEN);
636 dma_addr = pci_map_page(enic->pdev, frag->page,
637 offset, len,
638 PCI_DMA_TODEVICE);
639 enic_queue_wq_desc_cont(wq, skb,
640 dma_addr,
641 len,
642 (len_left == 0) &&
643 (len == frag_len_left)); /* EOP? */
644 frag_len_left -= len;
645 offset += len;
646 }
647 }
648 }
649
650 static inline void enic_queue_wq_skb(struct enic *enic,
651 struct vnic_wq *wq, struct sk_buff *skb)
652 {
653 unsigned int mss = skb_shinfo(skb)->gso_size;
654 unsigned int vlan_tag = 0;
655 int vlan_tag_insert = 0;
656
657 if (enic->vlan_group && vlan_tx_tag_present(skb)) {
658 /* VLAN tag from trunking driver */
659 vlan_tag_insert = 1;
660 vlan_tag = vlan_tx_tag_get(skb);
661 }
662
663 if (mss)
664 enic_queue_wq_skb_tso(enic, wq, skb, mss,
665 vlan_tag_insert, vlan_tag);
666 else if (skb->ip_summed == CHECKSUM_PARTIAL)
667 enic_queue_wq_skb_csum_l4(enic, wq, skb,
668 vlan_tag_insert, vlan_tag);
669 else
670 enic_queue_wq_skb_vlan(enic, wq, skb,
671 vlan_tag_insert, vlan_tag);
672 }
673
674 /* netif_tx_lock held, process context with BHs disabled, or BH */
675 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
676 struct net_device *netdev)
677 {
678 struct enic *enic = netdev_priv(netdev);
679 struct vnic_wq *wq = &enic->wq[0];
680 unsigned long flags;
681
682 if (skb->len <= 0) {
683 dev_kfree_skb(skb);
684 return NETDEV_TX_OK;
685 }
686
687 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
688 * which is very likely. In the off chance it's going to take
689 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
690 */
691
692 if (skb_shinfo(skb)->gso_size == 0 &&
693 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
694 skb_linearize(skb)) {
695 dev_kfree_skb(skb);
696 return NETDEV_TX_OK;
697 }
698
699 spin_lock_irqsave(&enic->wq_lock[0], flags);
700
701 if (vnic_wq_desc_avail(wq) <
702 skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
703 netif_stop_queue(netdev);
704 /* This is a hard error, log it */
705 printk(KERN_ERR PFX "%s: BUG! Tx ring full when "
706 "queue awake!\n", netdev->name);
707 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
708 return NETDEV_TX_BUSY;
709 }
710
711 enic_queue_wq_skb(enic, wq, skb);
712
713 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
714 netif_stop_queue(netdev);
715
716 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
717
718 return NETDEV_TX_OK;
719 }
720
721 /* dev_base_lock rwlock held, nominally process context */
722 static struct net_device_stats *enic_get_stats(struct net_device *netdev)
723 {
724 struct enic *enic = netdev_priv(netdev);
725 struct net_device_stats *net_stats = &netdev->stats;
726 struct vnic_stats *stats;
727
728 spin_lock(&enic->devcmd_lock);
729 vnic_dev_stats_dump(enic->vdev, &stats);
730 spin_unlock(&enic->devcmd_lock);
731
732 net_stats->tx_packets = stats->tx.tx_frames_ok;
733 net_stats->tx_bytes = stats->tx.tx_bytes_ok;
734 net_stats->tx_errors = stats->tx.tx_errors;
735 net_stats->tx_dropped = stats->tx.tx_drops;
736
737 net_stats->rx_packets = stats->rx.rx_frames_ok;
738 net_stats->rx_bytes = stats->rx.rx_bytes_ok;
739 net_stats->rx_errors = stats->rx.rx_errors;
740 net_stats->multicast = stats->rx.rx_multicast_frames_ok;
741 net_stats->rx_crc_errors = enic->rq_bad_fcs;
742 net_stats->rx_dropped = stats->rx.rx_no_bufs;
743
744 return net_stats;
745 }
746
747 static void enic_reset_mcaddrs(struct enic *enic)
748 {
749 enic->mc_count = 0;
750 }
751
752 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
753 {
754 if (!is_valid_ether_addr(addr))
755 return -EADDRNOTAVAIL;
756
757 memcpy(netdev->dev_addr, addr, netdev->addr_len);
758
759 return 0;
760 }
761
762 /* netif_tx_lock held, BHs disabled */
763 static void enic_set_multicast_list(struct net_device *netdev)
764 {
765 struct enic *enic = netdev_priv(netdev);
766 struct dev_mc_list *list = netdev->mc_list;
767 int directed = 1;
768 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
769 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
770 int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0;
771 int allmulti = (netdev->flags & IFF_ALLMULTI) ||
772 (netdev->mc_count > ENIC_MULTICAST_PERFECT_FILTERS);
773 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
774 unsigned int mc_count = netdev->mc_count;
775 unsigned int i, j;
776
777 if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS)
778 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
779
780 spin_lock(&enic->devcmd_lock);
781
782 vnic_dev_packet_filter(enic->vdev, directed,
783 multicast, broadcast, promisc, allmulti);
784
785 /* Is there an easier way? Trying to minimize to
786 * calls to add/del multicast addrs. We keep the
787 * addrs from the last call in enic->mc_addr and
788 * look for changes to add/del.
789 */
790
791 for (i = 0; list && i < mc_count; i++) {
792 memcpy(mc_addr[i], list->dmi_addr, ETH_ALEN);
793 list = list->next;
794 }
795
796 for (i = 0; i < enic->mc_count; i++) {
797 for (j = 0; j < mc_count; j++)
798 if (compare_ether_addr(enic->mc_addr[i],
799 mc_addr[j]) == 0)
800 break;
801 if (j == mc_count)
802 enic_del_multicast_addr(enic, enic->mc_addr[i]);
803 }
804
805 for (i = 0; i < mc_count; i++) {
806 for (j = 0; j < enic->mc_count; j++)
807 if (compare_ether_addr(mc_addr[i],
808 enic->mc_addr[j]) == 0)
809 break;
810 if (j == enic->mc_count)
811 enic_add_multicast_addr(enic, mc_addr[i]);
812 }
813
814 /* Save the list to compare against next time
815 */
816
817 for (i = 0; i < mc_count; i++)
818 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
819
820 enic->mc_count = mc_count;
821
822 spin_unlock(&enic->devcmd_lock);
823 }
824
825 /* rtnl lock is held */
826 static void enic_vlan_rx_register(struct net_device *netdev,
827 struct vlan_group *vlan_group)
828 {
829 struct enic *enic = netdev_priv(netdev);
830 enic->vlan_group = vlan_group;
831 }
832
833 /* rtnl lock is held */
834 static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
835 {
836 struct enic *enic = netdev_priv(netdev);
837
838 spin_lock(&enic->devcmd_lock);
839 enic_add_vlan(enic, vid);
840 spin_unlock(&enic->devcmd_lock);
841 }
842
843 /* rtnl lock is held */
844 static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
845 {
846 struct enic *enic = netdev_priv(netdev);
847
848 spin_lock(&enic->devcmd_lock);
849 enic_del_vlan(enic, vid);
850 spin_unlock(&enic->devcmd_lock);
851 }
852
853 /* netif_tx_lock held, BHs disabled */
854 static void enic_tx_timeout(struct net_device *netdev)
855 {
856 struct enic *enic = netdev_priv(netdev);
857 schedule_work(&enic->reset);
858 }
859
860 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
861 {
862 struct enic *enic = vnic_dev_priv(rq->vdev);
863
864 if (!buf->os_buf)
865 return;
866
867 pci_unmap_single(enic->pdev, buf->dma_addr,
868 buf->len, PCI_DMA_FROMDEVICE);
869 dev_kfree_skb_any(buf->os_buf);
870 }
871
872 static inline struct sk_buff *enic_rq_alloc_skb(struct net_device *netdev,
873 unsigned int size)
874 {
875 struct sk_buff *skb;
876
877 skb = netdev_alloc_skb(netdev, size + NET_IP_ALIGN);
878
879 if (skb)
880 skb_reserve(skb, NET_IP_ALIGN);
881
882 return skb;
883 }
884
885 static int enic_rq_alloc_buf(struct vnic_rq *rq)
886 {
887 struct enic *enic = vnic_dev_priv(rq->vdev);
888 struct net_device *netdev = enic->netdev;
889 struct sk_buff *skb;
890 unsigned int len = netdev->mtu + ETH_HLEN;
891 unsigned int os_buf_index = 0;
892 dma_addr_t dma_addr;
893
894 skb = enic_rq_alloc_skb(netdev, len);
895 if (!skb)
896 return -ENOMEM;
897
898 dma_addr = pci_map_single(enic->pdev, skb->data,
899 len, PCI_DMA_FROMDEVICE);
900
901 enic_queue_rq_desc(rq, skb, os_buf_index,
902 dma_addr, len);
903
904 return 0;
905 }
906
907 static int enic_rq_alloc_buf_a1(struct vnic_rq *rq)
908 {
909 struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
910
911 if (vnic_rq_posting_soon(rq)) {
912
913 /* SW workaround for A0 HW erratum: if we're just about
914 * to write posted_index, insert a dummy desc
915 * of type resvd
916 */
917
918 rq_enet_desc_enc(desc, 0, RQ_ENET_TYPE_RESV2, 0);
919 vnic_rq_post(rq, 0, 0, 0, 0);
920 } else {
921 return enic_rq_alloc_buf(rq);
922 }
923
924 return 0;
925 }
926
927 static int enic_set_rq_alloc_buf(struct enic *enic)
928 {
929 enum vnic_dev_hw_version hw_ver;
930 int err;
931
932 err = vnic_dev_hw_version(enic->vdev, &hw_ver);
933 if (err)
934 return err;
935
936 switch (hw_ver) {
937 case VNIC_DEV_HW_VER_A1:
938 enic->rq_alloc_buf = enic_rq_alloc_buf_a1;
939 break;
940 case VNIC_DEV_HW_VER_A2:
941 case VNIC_DEV_HW_VER_UNKNOWN:
942 enic->rq_alloc_buf = enic_rq_alloc_buf;
943 break;
944 default:
945 return -ENODEV;
946 }
947
948 return 0;
949 }
950
951 static int enic_get_skb_header(struct sk_buff *skb, void **iphdr,
952 void **tcph, u64 *hdr_flags, void *priv)
953 {
954 struct cq_enet_rq_desc *cq_desc = priv;
955 unsigned int ip_len;
956 struct iphdr *iph;
957
958 u8 type, color, eop, sop, ingress_port, vlan_stripped;
959 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
960 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
961 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
962 u8 packet_error;
963 u16 q_number, completed_index, bytes_written, vlan, checksum;
964 u32 rss_hash;
965
966 cq_enet_rq_desc_dec(cq_desc,
967 &type, &color, &q_number, &completed_index,
968 &ingress_port, &fcoe, &eop, &sop, &rss_type,
969 &csum_not_calc, &rss_hash, &bytes_written,
970 &packet_error, &vlan_stripped, &vlan, &checksum,
971 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
972 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
973 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
974 &fcs_ok);
975
976 if (!(ipv4 && tcp && !ipv4_fragment))
977 return -1;
978
979 skb_reset_network_header(skb);
980 iph = ip_hdr(skb);
981
982 ip_len = ip_hdrlen(skb);
983 skb_set_transport_header(skb, ip_len);
984
985 /* check if ip header and tcp header are complete */
986 if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
987 return -1;
988
989 *hdr_flags = LRO_IPV4 | LRO_TCP;
990 *tcph = tcp_hdr(skb);
991 *iphdr = iph;
992
993 return 0;
994 }
995
996 static void enic_rq_indicate_buf(struct vnic_rq *rq,
997 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
998 int skipped, void *opaque)
999 {
1000 struct enic *enic = vnic_dev_priv(rq->vdev);
1001 struct net_device *netdev = enic->netdev;
1002 struct sk_buff *skb;
1003
1004 u8 type, color, eop, sop, ingress_port, vlan_stripped;
1005 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1006 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1007 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1008 u8 packet_error;
1009 u16 q_number, completed_index, bytes_written, vlan, checksum;
1010 u32 rss_hash;
1011
1012 if (skipped)
1013 return;
1014
1015 skb = buf->os_buf;
1016 prefetch(skb->data - NET_IP_ALIGN);
1017 pci_unmap_single(enic->pdev, buf->dma_addr,
1018 buf->len, PCI_DMA_FROMDEVICE);
1019
1020 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1021 &type, &color, &q_number, &completed_index,
1022 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1023 &csum_not_calc, &rss_hash, &bytes_written,
1024 &packet_error, &vlan_stripped, &vlan, &checksum,
1025 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1026 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1027 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1028 &fcs_ok);
1029
1030 if (packet_error) {
1031
1032 if (bytes_written > 0 && !fcs_ok)
1033 enic->rq_bad_fcs++;
1034
1035 dev_kfree_skb_any(skb);
1036
1037 return;
1038 }
1039
1040 if (eop && bytes_written > 0) {
1041
1042 /* Good receive
1043 */
1044
1045 skb_put(skb, bytes_written);
1046 skb->protocol = eth_type_trans(skb, netdev);
1047
1048 if (enic->csum_rx_enabled && !csum_not_calc) {
1049 skb->csum = htons(checksum);
1050 skb->ip_summed = CHECKSUM_COMPLETE;
1051 }
1052
1053 skb->dev = netdev;
1054
1055 if (enic->vlan_group && vlan_stripped) {
1056
1057 if ((netdev->features & NETIF_F_LRO) && ipv4)
1058 lro_vlan_hwaccel_receive_skb(&enic->lro_mgr,
1059 skb, enic->vlan_group,
1060 vlan, cq_desc);
1061 else
1062 vlan_hwaccel_receive_skb(skb,
1063 enic->vlan_group, vlan);
1064
1065 } else {
1066
1067 if ((netdev->features & NETIF_F_LRO) && ipv4)
1068 lro_receive_skb(&enic->lro_mgr, skb, cq_desc);
1069 else
1070 netif_receive_skb(skb);
1071
1072 }
1073
1074 } else {
1075
1076 /* Buffer overflow
1077 */
1078
1079 dev_kfree_skb_any(skb);
1080 }
1081 }
1082
1083 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1084 u8 type, u16 q_number, u16 completed_index, void *opaque)
1085 {
1086 struct enic *enic = vnic_dev_priv(vdev);
1087
1088 vnic_rq_service(&enic->rq[q_number], cq_desc,
1089 completed_index, VNIC_RQ_RETURN_DESC,
1090 enic_rq_indicate_buf, opaque);
1091
1092 return 0;
1093 }
1094
1095 static void enic_rq_drop_buf(struct vnic_rq *rq,
1096 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1097 int skipped, void *opaque)
1098 {
1099 struct enic *enic = vnic_dev_priv(rq->vdev);
1100 struct sk_buff *skb = buf->os_buf;
1101
1102 if (skipped)
1103 return;
1104
1105 pci_unmap_single(enic->pdev, buf->dma_addr,
1106 buf->len, PCI_DMA_FROMDEVICE);
1107
1108 dev_kfree_skb_any(skb);
1109 }
1110
1111 static int enic_rq_service_drop(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1112 u8 type, u16 q_number, u16 completed_index, void *opaque)
1113 {
1114 struct enic *enic = vnic_dev_priv(vdev);
1115
1116 vnic_rq_service(&enic->rq[q_number], cq_desc,
1117 completed_index, VNIC_RQ_RETURN_DESC,
1118 enic_rq_drop_buf, opaque);
1119
1120 return 0;
1121 }
1122
1123 static int enic_poll(struct napi_struct *napi, int budget)
1124 {
1125 struct enic *enic = container_of(napi, struct enic, napi);
1126 struct net_device *netdev = enic->netdev;
1127 unsigned int rq_work_to_do = budget;
1128 unsigned int wq_work_to_do = -1; /* no limit */
1129 unsigned int work_done, rq_work_done, wq_work_done;
1130
1131 /* Service RQ (first) and WQ
1132 */
1133
1134 rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1135 rq_work_to_do, enic_rq_service, NULL);
1136
1137 wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1138 wq_work_to_do, enic_wq_service, NULL);
1139
1140 /* Accumulate intr event credits for this polling
1141 * cycle. An intr event is the completion of a
1142 * a WQ or RQ packet.
1143 */
1144
1145 work_done = rq_work_done + wq_work_done;
1146
1147 if (work_done > 0)
1148 vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ],
1149 work_done,
1150 0 /* don't unmask intr */,
1151 0 /* don't reset intr timer */);
1152
1153 if (rq_work_done > 0) {
1154
1155 /* Replenish RQ
1156 */
1157
1158 vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
1159
1160 } else {
1161
1162 /* If no work done, flush all LROs and exit polling
1163 */
1164
1165 if (netdev->features & NETIF_F_LRO)
1166 lro_flush_all(&enic->lro_mgr);
1167
1168 napi_complete(napi);
1169 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
1170 }
1171
1172 return rq_work_done;
1173 }
1174
1175 static int enic_poll_msix(struct napi_struct *napi, int budget)
1176 {
1177 struct enic *enic = container_of(napi, struct enic, napi);
1178 struct net_device *netdev = enic->netdev;
1179 unsigned int work_to_do = budget;
1180 unsigned int work_done;
1181
1182 /* Service RQ
1183 */
1184
1185 work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1186 work_to_do, enic_rq_service, NULL);
1187
1188 if (work_done > 0) {
1189
1190 /* Replenish RQ
1191 */
1192
1193 vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
1194
1195 /* Return intr event credits for this polling
1196 * cycle. An intr event is the completion of a
1197 * RQ packet.
1198 */
1199
1200 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ],
1201 work_done,
1202 0 /* don't unmask intr */,
1203 0 /* don't reset intr timer */);
1204 } else {
1205
1206 /* If no work done, flush all LROs and exit polling
1207 */
1208
1209 if (netdev->features & NETIF_F_LRO)
1210 lro_flush_all(&enic->lro_mgr);
1211
1212 napi_complete(napi);
1213 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
1214 }
1215
1216 return work_done;
1217 }
1218
1219 static void enic_notify_timer(unsigned long data)
1220 {
1221 struct enic *enic = (struct enic *)data;
1222
1223 enic_notify_check(enic);
1224
1225 mod_timer(&enic->notify_timer,
1226 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1227 }
1228
1229 static void enic_free_intr(struct enic *enic)
1230 {
1231 struct net_device *netdev = enic->netdev;
1232 unsigned int i;
1233
1234 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1235 case VNIC_DEV_INTR_MODE_INTX:
1236 free_irq(enic->pdev->irq, netdev);
1237 break;
1238 case VNIC_DEV_INTR_MODE_MSI:
1239 free_irq(enic->pdev->irq, enic);
1240 break;
1241 case VNIC_DEV_INTR_MODE_MSIX:
1242 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1243 if (enic->msix[i].requested)
1244 free_irq(enic->msix_entry[i].vector,
1245 enic->msix[i].devid);
1246 break;
1247 default:
1248 break;
1249 }
1250 }
1251
1252 static int enic_request_intr(struct enic *enic)
1253 {
1254 struct net_device *netdev = enic->netdev;
1255 unsigned int i;
1256 int err = 0;
1257
1258 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1259
1260 case VNIC_DEV_INTR_MODE_INTX:
1261
1262 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1263 IRQF_SHARED, netdev->name, netdev);
1264 break;
1265
1266 case VNIC_DEV_INTR_MODE_MSI:
1267
1268 err = request_irq(enic->pdev->irq, enic_isr_msi,
1269 0, netdev->name, enic);
1270 break;
1271
1272 case VNIC_DEV_INTR_MODE_MSIX:
1273
1274 sprintf(enic->msix[ENIC_MSIX_RQ].devname,
1275 "%.11s-rx-0", netdev->name);
1276 enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq;
1277 enic->msix[ENIC_MSIX_RQ].devid = enic;
1278
1279 sprintf(enic->msix[ENIC_MSIX_WQ].devname,
1280 "%.11s-tx-0", netdev->name);
1281 enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq;
1282 enic->msix[ENIC_MSIX_WQ].devid = enic;
1283
1284 sprintf(enic->msix[ENIC_MSIX_ERR].devname,
1285 "%.11s-err", netdev->name);
1286 enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err;
1287 enic->msix[ENIC_MSIX_ERR].devid = enic;
1288
1289 sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname,
1290 "%.11s-notify", netdev->name);
1291 enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify;
1292 enic->msix[ENIC_MSIX_NOTIFY].devid = enic;
1293
1294 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) {
1295 err = request_irq(enic->msix_entry[i].vector,
1296 enic->msix[i].isr, 0,
1297 enic->msix[i].devname,
1298 enic->msix[i].devid);
1299 if (err) {
1300 enic_free_intr(enic);
1301 break;
1302 }
1303 enic->msix[i].requested = 1;
1304 }
1305
1306 break;
1307
1308 default:
1309 break;
1310 }
1311
1312 return err;
1313 }
1314
1315 static int enic_notify_set(struct enic *enic)
1316 {
1317 int err;
1318
1319 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1320 case VNIC_DEV_INTR_MODE_INTX:
1321 err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY);
1322 break;
1323 case VNIC_DEV_INTR_MODE_MSIX:
1324 err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY);
1325 break;
1326 default:
1327 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1328 break;
1329 }
1330
1331 return err;
1332 }
1333
1334 static void enic_notify_timer_start(struct enic *enic)
1335 {
1336 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1337 case VNIC_DEV_INTR_MODE_MSI:
1338 mod_timer(&enic->notify_timer, jiffies);
1339 break;
1340 default:
1341 /* Using intr for notification for INTx/MSI-X */
1342 break;
1343 };
1344 }
1345
1346 /* rtnl lock is held, process context */
1347 static int enic_open(struct net_device *netdev)
1348 {
1349 struct enic *enic = netdev_priv(netdev);
1350 unsigned int i;
1351 int err;
1352
1353 err = enic_request_intr(enic);
1354 if (err) {
1355 printk(KERN_ERR PFX "%s: Unable to request irq.\n",
1356 netdev->name);
1357 return err;
1358 }
1359
1360 err = enic_notify_set(enic);
1361 if (err) {
1362 printk(KERN_ERR PFX
1363 "%s: Failed to alloc notify buffer, aborting.\n",
1364 netdev->name);
1365 goto err_out_free_intr;
1366 }
1367
1368 for (i = 0; i < enic->rq_count; i++) {
1369 err = vnic_rq_fill(&enic->rq[i], enic->rq_alloc_buf);
1370 if (err) {
1371 printk(KERN_ERR PFX
1372 "%s: Unable to alloc receive buffers.\n",
1373 netdev->name);
1374 goto err_out_notify_unset;
1375 }
1376 }
1377
1378 for (i = 0; i < enic->wq_count; i++)
1379 vnic_wq_enable(&enic->wq[i]);
1380 for (i = 0; i < enic->rq_count; i++)
1381 vnic_rq_enable(&enic->rq[i]);
1382
1383 enic_add_station_addr(enic);
1384 enic_set_multicast_list(netdev);
1385
1386 netif_wake_queue(netdev);
1387 napi_enable(&enic->napi);
1388 vnic_dev_enable(enic->vdev);
1389
1390 for (i = 0; i < enic->intr_count; i++)
1391 vnic_intr_unmask(&enic->intr[i]);
1392
1393 enic_notify_timer_start(enic);
1394
1395 return 0;
1396
1397 err_out_notify_unset:
1398 vnic_dev_notify_unset(enic->vdev);
1399 err_out_free_intr:
1400 enic_free_intr(enic);
1401
1402 return err;
1403 }
1404
1405 /* rtnl lock is held, process context */
1406 static int enic_stop(struct net_device *netdev)
1407 {
1408 struct enic *enic = netdev_priv(netdev);
1409 unsigned int i;
1410 int err;
1411
1412 del_timer_sync(&enic->notify_timer);
1413
1414 vnic_dev_disable(enic->vdev);
1415 napi_disable(&enic->napi);
1416 netif_stop_queue(netdev);
1417
1418 for (i = 0; i < enic->intr_count; i++)
1419 vnic_intr_mask(&enic->intr[i]);
1420
1421 for (i = 0; i < enic->wq_count; i++) {
1422 err = vnic_wq_disable(&enic->wq[i]);
1423 if (err)
1424 return err;
1425 }
1426 for (i = 0; i < enic->rq_count; i++) {
1427 err = vnic_rq_disable(&enic->rq[i]);
1428 if (err)
1429 return err;
1430 }
1431
1432 vnic_dev_notify_unset(enic->vdev);
1433 enic_free_intr(enic);
1434
1435 (void)vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1436 -1, enic_rq_service_drop, NULL);
1437 (void)vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1438 -1, enic_wq_service, NULL);
1439
1440 for (i = 0; i < enic->wq_count; i++)
1441 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1442 for (i = 0; i < enic->rq_count; i++)
1443 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1444 for (i = 0; i < enic->cq_count; i++)
1445 vnic_cq_clean(&enic->cq[i]);
1446 for (i = 0; i < enic->intr_count; i++)
1447 vnic_intr_clean(&enic->intr[i]);
1448
1449 return 0;
1450 }
1451
1452 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1453 {
1454 struct enic *enic = netdev_priv(netdev);
1455 int running = netif_running(netdev);
1456
1457 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1458 return -EINVAL;
1459
1460 if (running)
1461 enic_stop(netdev);
1462
1463 netdev->mtu = new_mtu;
1464
1465 if (netdev->mtu > enic->port_mtu)
1466 printk(KERN_WARNING PFX
1467 "%s: interface MTU (%d) set higher "
1468 "than port MTU (%d)\n",
1469 netdev->name, netdev->mtu, enic->port_mtu);
1470
1471 if (running)
1472 enic_open(netdev);
1473
1474 return 0;
1475 }
1476
1477 #ifdef CONFIG_NET_POLL_CONTROLLER
1478 static void enic_poll_controller(struct net_device *netdev)
1479 {
1480 struct enic *enic = netdev_priv(netdev);
1481 struct vnic_dev *vdev = enic->vdev;
1482
1483 switch (vnic_dev_get_intr_mode(vdev)) {
1484 case VNIC_DEV_INTR_MODE_MSIX:
1485 enic_isr_msix_rq(enic->pdev->irq, enic);
1486 enic_isr_msix_wq(enic->pdev->irq, enic);
1487 break;
1488 case VNIC_DEV_INTR_MODE_MSI:
1489 enic_isr_msi(enic->pdev->irq, enic);
1490 break;
1491 case VNIC_DEV_INTR_MODE_INTX:
1492 enic_isr_legacy(enic->pdev->irq, netdev);
1493 break;
1494 default:
1495 break;
1496 }
1497 }
1498 #endif
1499
1500 static int enic_dev_wait(struct vnic_dev *vdev,
1501 int (*start)(struct vnic_dev *, int),
1502 int (*finished)(struct vnic_dev *, int *),
1503 int arg)
1504 {
1505 unsigned long time;
1506 int done;
1507 int err;
1508
1509 BUG_ON(in_interrupt());
1510
1511 err = start(vdev, arg);
1512 if (err)
1513 return err;
1514
1515 /* Wait for func to complete...2 seconds max
1516 */
1517
1518 time = jiffies + (HZ * 2);
1519 do {
1520
1521 err = finished(vdev, &done);
1522 if (err)
1523 return err;
1524
1525 if (done)
1526 return 0;
1527
1528 schedule_timeout_uninterruptible(HZ / 10);
1529
1530 } while (time_after(time, jiffies));
1531
1532 return -ETIMEDOUT;
1533 }
1534
1535 static int enic_dev_open(struct enic *enic)
1536 {
1537 int err;
1538
1539 err = enic_dev_wait(enic->vdev, vnic_dev_open,
1540 vnic_dev_open_done, 0);
1541 if (err)
1542 printk(KERN_ERR PFX
1543 "vNIC device open failed, err %d.\n", err);
1544
1545 return err;
1546 }
1547
1548 static int enic_dev_soft_reset(struct enic *enic)
1549 {
1550 int err;
1551
1552 err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset,
1553 vnic_dev_soft_reset_done, 0);
1554 if (err)
1555 printk(KERN_ERR PFX
1556 "vNIC soft reset failed, err %d.\n", err);
1557
1558 return err;
1559 }
1560
1561 static int enic_set_niccfg(struct enic *enic)
1562 {
1563 const u8 rss_default_cpu = 0;
1564 const u8 rss_hash_type = 0;
1565 const u8 rss_hash_bits = 0;
1566 const u8 rss_base_cpu = 0;
1567 const u8 rss_enable = 0;
1568 const u8 tso_ipid_split_en = 0;
1569 const u8 ig_vlan_strip_en = 1;
1570
1571 /* Enable VLAN tag stripping. RSS not enabled (yet).
1572 */
1573
1574 return enic_set_nic_cfg(enic,
1575 rss_default_cpu, rss_hash_type,
1576 rss_hash_bits, rss_base_cpu,
1577 rss_enable, tso_ipid_split_en,
1578 ig_vlan_strip_en);
1579 }
1580
1581 static void enic_reset(struct work_struct *work)
1582 {
1583 struct enic *enic = container_of(work, struct enic, reset);
1584
1585 if (!netif_running(enic->netdev))
1586 return;
1587
1588 rtnl_lock();
1589
1590 spin_lock(&enic->devcmd_lock);
1591 vnic_dev_hang_notify(enic->vdev);
1592 spin_unlock(&enic->devcmd_lock);
1593
1594 enic_stop(enic->netdev);
1595 enic_dev_soft_reset(enic);
1596 vnic_dev_init(enic->vdev, 0);
1597 enic_reset_mcaddrs(enic);
1598 enic_init_vnic_resources(enic);
1599 enic_set_niccfg(enic);
1600 enic_open(enic->netdev);
1601
1602 rtnl_unlock();
1603 }
1604
1605 static int enic_set_intr_mode(struct enic *enic)
1606 {
1607 unsigned int n = ARRAY_SIZE(enic->rq);
1608 unsigned int m = ARRAY_SIZE(enic->wq);
1609 unsigned int i;
1610
1611 /* Set interrupt mode (INTx, MSI, MSI-X) depending
1612 * system capabilities.
1613 *
1614 * Try MSI-X first
1615 *
1616 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1617 * (the second to last INTR is used for WQ/RQ errors)
1618 * (the last INTR is used for notifications)
1619 */
1620
1621 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
1622 for (i = 0; i < n + m + 2; i++)
1623 enic->msix_entry[i].entry = i;
1624
1625 if (enic->config.intr_mode < 1 &&
1626 enic->rq_count >= n &&
1627 enic->wq_count >= m &&
1628 enic->cq_count >= n + m &&
1629 enic->intr_count >= n + m + 2 &&
1630 !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
1631
1632 enic->rq_count = n;
1633 enic->wq_count = m;
1634 enic->cq_count = n + m;
1635 enic->intr_count = n + m + 2;
1636
1637 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX);
1638
1639 return 0;
1640 }
1641
1642 /* Next try MSI
1643 *
1644 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
1645 */
1646
1647 if (enic->config.intr_mode < 2 &&
1648 enic->rq_count >= 1 &&
1649 enic->wq_count >= 1 &&
1650 enic->cq_count >= 2 &&
1651 enic->intr_count >= 1 &&
1652 !pci_enable_msi(enic->pdev)) {
1653
1654 enic->rq_count = 1;
1655 enic->wq_count = 1;
1656 enic->cq_count = 2;
1657 enic->intr_count = 1;
1658
1659 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
1660
1661 return 0;
1662 }
1663
1664 /* Next try INTx
1665 *
1666 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
1667 * (the first INTR is used for WQ/RQ)
1668 * (the second INTR is used for WQ/RQ errors)
1669 * (the last INTR is used for notifications)
1670 */
1671
1672 if (enic->config.intr_mode < 3 &&
1673 enic->rq_count >= 1 &&
1674 enic->wq_count >= 1 &&
1675 enic->cq_count >= 2 &&
1676 enic->intr_count >= 3) {
1677
1678 enic->rq_count = 1;
1679 enic->wq_count = 1;
1680 enic->cq_count = 2;
1681 enic->intr_count = 3;
1682
1683 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
1684
1685 return 0;
1686 }
1687
1688 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1689
1690 return -EINVAL;
1691 }
1692
1693 static void enic_clear_intr_mode(struct enic *enic)
1694 {
1695 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1696 case VNIC_DEV_INTR_MODE_MSIX:
1697 pci_disable_msix(enic->pdev);
1698 break;
1699 case VNIC_DEV_INTR_MODE_MSI:
1700 pci_disable_msi(enic->pdev);
1701 break;
1702 default:
1703 break;
1704 }
1705
1706 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1707 }
1708
1709 static const struct net_device_ops enic_netdev_ops = {
1710 .ndo_open = enic_open,
1711 .ndo_stop = enic_stop,
1712 .ndo_start_xmit = enic_hard_start_xmit,
1713 .ndo_get_stats = enic_get_stats,
1714 .ndo_validate_addr = eth_validate_addr,
1715 .ndo_set_mac_address = eth_mac_addr,
1716 .ndo_set_multicast_list = enic_set_multicast_list,
1717 .ndo_change_mtu = enic_change_mtu,
1718 .ndo_vlan_rx_register = enic_vlan_rx_register,
1719 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
1720 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
1721 .ndo_tx_timeout = enic_tx_timeout,
1722 #ifdef CONFIG_NET_POLL_CONTROLLER
1723 .ndo_poll_controller = enic_poll_controller,
1724 #endif
1725 };
1726
1727 static void enic_iounmap(struct enic *enic)
1728 {
1729 unsigned int i;
1730
1731 for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
1732 if (enic->bar[i].vaddr)
1733 iounmap(enic->bar[i].vaddr);
1734 }
1735
1736 static int __devinit enic_probe(struct pci_dev *pdev,
1737 const struct pci_device_id *ent)
1738 {
1739 struct net_device *netdev;
1740 struct enic *enic;
1741 int using_dac = 0;
1742 unsigned int i;
1743 int err;
1744
1745 /* Allocate net device structure and initialize. Private
1746 * instance data is initialized to zero.
1747 */
1748
1749 netdev = alloc_etherdev(sizeof(struct enic));
1750 if (!netdev) {
1751 printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
1752 return -ENOMEM;
1753 }
1754
1755 pci_set_drvdata(pdev, netdev);
1756
1757 SET_NETDEV_DEV(netdev, &pdev->dev);
1758
1759 enic = netdev_priv(netdev);
1760 enic->netdev = netdev;
1761 enic->pdev = pdev;
1762
1763 /* Setup PCI resources
1764 */
1765
1766 err = pci_enable_device(pdev);
1767 if (err) {
1768 printk(KERN_ERR PFX
1769 "Cannot enable PCI device, aborting.\n");
1770 goto err_out_free_netdev;
1771 }
1772
1773 err = pci_request_regions(pdev, DRV_NAME);
1774 if (err) {
1775 printk(KERN_ERR PFX
1776 "Cannot request PCI regions, aborting.\n");
1777 goto err_out_disable_device;
1778 }
1779
1780 pci_set_master(pdev);
1781
1782 /* Query PCI controller on system for DMA addressing
1783 * limitation for the device. Try 40-bit first, and
1784 * fail to 32-bit.
1785 */
1786
1787 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
1788 if (err) {
1789 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
1790 if (err) {
1791 printk(KERN_ERR PFX
1792 "No usable DMA configuration, aborting.\n");
1793 goto err_out_release_regions;
1794 }
1795 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
1796 if (err) {
1797 printk(KERN_ERR PFX
1798 "Unable to obtain 32-bit DMA "
1799 "for consistent allocations, aborting.\n");
1800 goto err_out_release_regions;
1801 }
1802 } else {
1803 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
1804 if (err) {
1805 printk(KERN_ERR PFX
1806 "Unable to obtain 40-bit DMA "
1807 "for consistent allocations, aborting.\n");
1808 goto err_out_release_regions;
1809 }
1810 using_dac = 1;
1811 }
1812
1813 /* Map vNIC resources from BAR0-5
1814 */
1815
1816 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
1817 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
1818 continue;
1819 enic->bar[i].len = pci_resource_len(pdev, i);
1820 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
1821 if (!enic->bar[i].vaddr) {
1822 printk(KERN_ERR PFX
1823 "Cannot memory-map BAR %d, aborting.\n", i);
1824 err = -ENODEV;
1825 goto err_out_iounmap;
1826 }
1827 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
1828 }
1829
1830 /* Register vNIC device
1831 */
1832
1833 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
1834 ARRAY_SIZE(enic->bar));
1835 if (!enic->vdev) {
1836 printk(KERN_ERR PFX
1837 "vNIC registration failed, aborting.\n");
1838 err = -ENODEV;
1839 goto err_out_iounmap;
1840 }
1841
1842 /* Issue device open to get device in known state
1843 */
1844
1845 err = enic_dev_open(enic);
1846 if (err) {
1847 printk(KERN_ERR PFX
1848 "vNIC dev open failed, aborting.\n");
1849 goto err_out_vnic_unregister;
1850 }
1851
1852 /* Issue device init to initialize the vnic-to-switch link.
1853 * We'll start with carrier off and wait for link UP
1854 * notification later to turn on carrier. We don't need
1855 * to wait here for the vnic-to-switch link initialization
1856 * to complete; link UP notification is the indication that
1857 * the process is complete.
1858 */
1859
1860 netif_carrier_off(netdev);
1861
1862 err = vnic_dev_init(enic->vdev, 0);
1863 if (err) {
1864 printk(KERN_ERR PFX
1865 "vNIC dev init failed, aborting.\n");
1866 goto err_out_dev_close;
1867 }
1868
1869 /* Get vNIC configuration
1870 */
1871
1872 err = enic_get_vnic_config(enic);
1873 if (err) {
1874 printk(KERN_ERR PFX
1875 "Get vNIC configuration failed, aborting.\n");
1876 goto err_out_dev_close;
1877 }
1878
1879 /* Get available resource counts
1880 */
1881
1882 enic_get_res_counts(enic);
1883
1884 /* Set interrupt mode based on resource counts and system
1885 * capabilities
1886 */
1887
1888 err = enic_set_intr_mode(enic);
1889 if (err) {
1890 printk(KERN_ERR PFX
1891 "Failed to set intr mode, aborting.\n");
1892 goto err_out_dev_close;
1893 }
1894
1895 /* Allocate and configure vNIC resources
1896 */
1897
1898 err = enic_alloc_vnic_resources(enic);
1899 if (err) {
1900 printk(KERN_ERR PFX
1901 "Failed to alloc vNIC resources, aborting.\n");
1902 goto err_out_free_vnic_resources;
1903 }
1904
1905 enic_init_vnic_resources(enic);
1906
1907 err = enic_set_niccfg(enic);
1908 if (err) {
1909 printk(KERN_ERR PFX
1910 "Failed to config nic, aborting.\n");
1911 goto err_out_free_vnic_resources;
1912 }
1913
1914 /* Setup notification timer, HW reset task, and locks
1915 */
1916
1917 init_timer(&enic->notify_timer);
1918 enic->notify_timer.function = enic_notify_timer;
1919 enic->notify_timer.data = (unsigned long)enic;
1920
1921 INIT_WORK(&enic->reset, enic_reset);
1922
1923 for (i = 0; i < enic->wq_count; i++)
1924 spin_lock_init(&enic->wq_lock[i]);
1925
1926 spin_lock_init(&enic->devcmd_lock);
1927
1928 /* Register net device
1929 */
1930
1931 enic->port_mtu = enic->config.mtu;
1932 (void)enic_change_mtu(netdev, enic->port_mtu);
1933
1934 err = enic_set_mac_addr(netdev, enic->mac_addr);
1935 if (err) {
1936 printk(KERN_ERR PFX
1937 "Invalid MAC address, aborting.\n");
1938 goto err_out_free_vnic_resources;
1939 }
1940
1941 netdev->netdev_ops = &enic_netdev_ops;
1942 netdev->watchdog_timeo = 2 * HZ;
1943 netdev->ethtool_ops = &enic_ethtool_ops;
1944
1945 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1946 default:
1947 netif_napi_add(netdev, &enic->napi, enic_poll, 64);
1948 break;
1949 case VNIC_DEV_INTR_MODE_MSIX:
1950 netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64);
1951 break;
1952 }
1953
1954 netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1955 if (ENIC_SETTING(enic, TXCSUM))
1956 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
1957 if (ENIC_SETTING(enic, TSO))
1958 netdev->features |= NETIF_F_TSO |
1959 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
1960 if (ENIC_SETTING(enic, LRO))
1961 netdev->features |= NETIF_F_LRO;
1962 if (using_dac)
1963 netdev->features |= NETIF_F_HIGHDMA;
1964
1965 enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
1966
1967 enic->lro_mgr.max_aggr = ENIC_LRO_MAX_AGGR;
1968 enic->lro_mgr.max_desc = ENIC_LRO_MAX_DESC;
1969 enic->lro_mgr.lro_arr = enic->lro_desc;
1970 enic->lro_mgr.get_skb_header = enic_get_skb_header;
1971 enic->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
1972 enic->lro_mgr.dev = netdev;
1973 enic->lro_mgr.ip_summed = CHECKSUM_COMPLETE;
1974 enic->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
1975
1976 err = register_netdev(netdev);
1977 if (err) {
1978 printk(KERN_ERR PFX
1979 "Cannot register net device, aborting.\n");
1980 goto err_out_free_vnic_resources;
1981 }
1982
1983 return 0;
1984
1985 err_out_free_vnic_resources:
1986 enic_free_vnic_resources(enic);
1987 err_out_dev_close:
1988 vnic_dev_close(enic->vdev);
1989 err_out_vnic_unregister:
1990 enic_clear_intr_mode(enic);
1991 vnic_dev_unregister(enic->vdev);
1992 err_out_iounmap:
1993 enic_iounmap(enic);
1994 err_out_release_regions:
1995 pci_release_regions(pdev);
1996 err_out_disable_device:
1997 pci_disable_device(pdev);
1998 err_out_free_netdev:
1999 pci_set_drvdata(pdev, NULL);
2000 free_netdev(netdev);
2001
2002 return err;
2003 }
2004
2005 static void __devexit enic_remove(struct pci_dev *pdev)
2006 {
2007 struct net_device *netdev = pci_get_drvdata(pdev);
2008
2009 if (netdev) {
2010 struct enic *enic = netdev_priv(netdev);
2011
2012 flush_scheduled_work();
2013 unregister_netdev(netdev);
2014 enic_free_vnic_resources(enic);
2015 vnic_dev_close(enic->vdev);
2016 enic_clear_intr_mode(enic);
2017 vnic_dev_unregister(enic->vdev);
2018 enic_iounmap(enic);
2019 pci_release_regions(pdev);
2020 pci_disable_device(pdev);
2021 pci_set_drvdata(pdev, NULL);
2022 free_netdev(netdev);
2023 }
2024 }
2025
2026 static struct pci_driver enic_driver = {
2027 .name = DRV_NAME,
2028 .id_table = enic_id_table,
2029 .probe = enic_probe,
2030 .remove = __devexit_p(enic_remove),
2031 };
2032
2033 static int __init enic_init_module(void)
2034 {
2035 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2036
2037 return pci_register_driver(&enic_driver);
2038 }
2039
2040 static void __exit enic_cleanup_module(void)
2041 {
2042 pci_unregister_driver(&enic_driver);
2043 }
2044
2045 module_init(enic_init_module);
2046 module_exit(enic_cleanup_module);
Linus' kernel tree