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019b1480cc0c7b296151af9de03ae105ffd5aa58
[deliverable/linux.git] / drivers / net / enic / enic_main.c
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 && 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_over_errors = enic->rq_truncated_pkts;
742 net_stats->rx_crc_errors = enic->rq_bad_fcs;
743 net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
744
745 return net_stats;
746 }
747
748 static void enic_reset_mcaddrs(struct enic *enic)
749 {
750 enic->mc_count = 0;
751 }
752
753 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
754 {
755 if (!is_valid_ether_addr(addr))
756 return -EADDRNOTAVAIL;
757
758 memcpy(netdev->dev_addr, addr, netdev->addr_len);
759
760 return 0;
761 }
762
763 /* netif_tx_lock held, BHs disabled */
764 static void enic_set_multicast_list(struct net_device *netdev)
765 {
766 struct enic *enic = netdev_priv(netdev);
767 struct dev_mc_list *list = netdev->mc_list;
768 int directed = 1;
769 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
770 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
771 int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0;
772 int allmulti = (netdev->flags & IFF_ALLMULTI) ||
773 (netdev->mc_count > ENIC_MULTICAST_PERFECT_FILTERS);
774 unsigned int flags = netdev->flags | (allmulti ? IFF_ALLMULTI : 0);
775 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
776 unsigned int mc_count = netdev->mc_count;
777 unsigned int i, j;
778
779 if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS)
780 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
781
782 spin_lock(&enic->devcmd_lock);
783
784 if (enic->flags != flags) {
785 enic->flags = flags;
786 vnic_dev_packet_filter(enic->vdev, directed,
787 multicast, broadcast, promisc, allmulti);
788 }
789
790 /* Is there an easier way? Trying to minimize to
791 * calls to add/del multicast addrs. We keep the
792 * addrs from the last call in enic->mc_addr and
793 * look for changes to add/del.
794 */
795
796 for (i = 0; list && i < mc_count; i++) {
797 memcpy(mc_addr[i], list->dmi_addr, ETH_ALEN);
798 list = list->next;
799 }
800
801 for (i = 0; i < enic->mc_count; i++) {
802 for (j = 0; j < mc_count; j++)
803 if (compare_ether_addr(enic->mc_addr[i],
804 mc_addr[j]) == 0)
805 break;
806 if (j == mc_count)
807 enic_del_multicast_addr(enic, enic->mc_addr[i]);
808 }
809
810 for (i = 0; i < mc_count; i++) {
811 for (j = 0; j < enic->mc_count; j++)
812 if (compare_ether_addr(mc_addr[i],
813 enic->mc_addr[j]) == 0)
814 break;
815 if (j == enic->mc_count)
816 enic_add_multicast_addr(enic, mc_addr[i]);
817 }
818
819 /* Save the list to compare against next time
820 */
821
822 for (i = 0; i < mc_count; i++)
823 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
824
825 enic->mc_count = mc_count;
826
827 spin_unlock(&enic->devcmd_lock);
828 }
829
830 /* rtnl lock is held */
831 static void enic_vlan_rx_register(struct net_device *netdev,
832 struct vlan_group *vlan_group)
833 {
834 struct enic *enic = netdev_priv(netdev);
835 enic->vlan_group = vlan_group;
836 }
837
838 /* rtnl lock is held */
839 static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
840 {
841 struct enic *enic = netdev_priv(netdev);
842
843 spin_lock(&enic->devcmd_lock);
844 enic_add_vlan(enic, vid);
845 spin_unlock(&enic->devcmd_lock);
846 }
847
848 /* rtnl lock is held */
849 static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
850 {
851 struct enic *enic = netdev_priv(netdev);
852
853 spin_lock(&enic->devcmd_lock);
854 enic_del_vlan(enic, vid);
855 spin_unlock(&enic->devcmd_lock);
856 }
857
858 /* netif_tx_lock held, BHs disabled */
859 static void enic_tx_timeout(struct net_device *netdev)
860 {
861 struct enic *enic = netdev_priv(netdev);
862 schedule_work(&enic->reset);
863 }
864
865 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
866 {
867 struct enic *enic = vnic_dev_priv(rq->vdev);
868
869 if (!buf->os_buf)
870 return;
871
872 pci_unmap_single(enic->pdev, buf->dma_addr,
873 buf->len, PCI_DMA_FROMDEVICE);
874 dev_kfree_skb_any(buf->os_buf);
875 }
876
877 static int enic_rq_alloc_buf(struct vnic_rq *rq)
878 {
879 struct enic *enic = vnic_dev_priv(rq->vdev);
880 struct net_device *netdev = enic->netdev;
881 struct sk_buff *skb;
882 unsigned int len = netdev->mtu + ETH_HLEN;
883 unsigned int os_buf_index = 0;
884 dma_addr_t dma_addr;
885
886 skb = netdev_alloc_skb_ip_align(netdev, len);
887 if (!skb)
888 return -ENOMEM;
889
890 dma_addr = pci_map_single(enic->pdev, skb->data,
891 len, PCI_DMA_FROMDEVICE);
892
893 enic_queue_rq_desc(rq, skb, os_buf_index,
894 dma_addr, len);
895
896 return 0;
897 }
898
899 static int enic_rq_alloc_buf_a1(struct vnic_rq *rq)
900 {
901 struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
902
903 if (vnic_rq_posting_soon(rq)) {
904
905 /* SW workaround for A0 HW erratum: if we're just about
906 * to write posted_index, insert a dummy desc
907 * of type resvd
908 */
909
910 rq_enet_desc_enc(desc, 0, RQ_ENET_TYPE_RESV2, 0);
911 vnic_rq_post(rq, 0, 0, 0, 0);
912 } else {
913 return enic_rq_alloc_buf(rq);
914 }
915
916 return 0;
917 }
918
919 static int enic_set_rq_alloc_buf(struct enic *enic)
920 {
921 enum vnic_dev_hw_version hw_ver;
922 int err;
923
924 err = vnic_dev_hw_version(enic->vdev, &hw_ver);
925 if (err)
926 return err;
927
928 switch (hw_ver) {
929 case VNIC_DEV_HW_VER_A1:
930 enic->rq_alloc_buf = enic_rq_alloc_buf_a1;
931 break;
932 case VNIC_DEV_HW_VER_A2:
933 case VNIC_DEV_HW_VER_UNKNOWN:
934 enic->rq_alloc_buf = enic_rq_alloc_buf;
935 break;
936 default:
937 return -ENODEV;
938 }
939
940 return 0;
941 }
942
943 static int enic_get_skb_header(struct sk_buff *skb, void **iphdr,
944 void **tcph, u64 *hdr_flags, void *priv)
945 {
946 struct cq_enet_rq_desc *cq_desc = priv;
947 unsigned int ip_len;
948 struct iphdr *iph;
949
950 u8 type, color, eop, sop, ingress_port, vlan_stripped;
951 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
952 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
953 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
954 u8 packet_error;
955 u16 q_number, completed_index, bytes_written, vlan, checksum;
956 u32 rss_hash;
957
958 cq_enet_rq_desc_dec(cq_desc,
959 &type, &color, &q_number, &completed_index,
960 &ingress_port, &fcoe, &eop, &sop, &rss_type,
961 &csum_not_calc, &rss_hash, &bytes_written,
962 &packet_error, &vlan_stripped, &vlan, &checksum,
963 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
964 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
965 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
966 &fcs_ok);
967
968 if (!(ipv4 && tcp && !ipv4_fragment))
969 return -1;
970
971 skb_reset_network_header(skb);
972 iph = ip_hdr(skb);
973
974 ip_len = ip_hdrlen(skb);
975 skb_set_transport_header(skb, ip_len);
976
977 /* check if ip header and tcp header are complete */
978 if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
979 return -1;
980
981 *hdr_flags = LRO_IPV4 | LRO_TCP;
982 *tcph = tcp_hdr(skb);
983 *iphdr = iph;
984
985 return 0;
986 }
987
988 static void enic_rq_indicate_buf(struct vnic_rq *rq,
989 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
990 int skipped, void *opaque)
991 {
992 struct enic *enic = vnic_dev_priv(rq->vdev);
993 struct net_device *netdev = enic->netdev;
994 struct sk_buff *skb;
995
996 u8 type, color, eop, sop, ingress_port, vlan_stripped;
997 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
998 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
999 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1000 u8 packet_error;
1001 u16 q_number, completed_index, bytes_written, vlan, checksum;
1002 u32 rss_hash;
1003
1004 if (skipped)
1005 return;
1006
1007 skb = buf->os_buf;
1008 prefetch(skb->data - NET_IP_ALIGN);
1009 pci_unmap_single(enic->pdev, buf->dma_addr,
1010 buf->len, PCI_DMA_FROMDEVICE);
1011
1012 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1013 &type, &color, &q_number, &completed_index,
1014 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1015 &csum_not_calc, &rss_hash, &bytes_written,
1016 &packet_error, &vlan_stripped, &vlan, &checksum,
1017 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1018 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1019 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1020 &fcs_ok);
1021
1022 if (packet_error) {
1023
1024 if (!fcs_ok) {
1025 if (bytes_written > 0)
1026 enic->rq_bad_fcs++;
1027 else if (bytes_written == 0)
1028 enic->rq_truncated_pkts++;
1029 }
1030
1031 dev_kfree_skb_any(skb);
1032
1033 return;
1034 }
1035
1036 if (eop && bytes_written > 0) {
1037
1038 /* Good receive
1039 */
1040
1041 skb_put(skb, bytes_written);
1042 skb->protocol = eth_type_trans(skb, netdev);
1043
1044 if (enic->csum_rx_enabled && !csum_not_calc) {
1045 skb->csum = htons(checksum);
1046 skb->ip_summed = CHECKSUM_COMPLETE;
1047 }
1048
1049 skb->dev = netdev;
1050
1051 if (enic->vlan_group && vlan_stripped) {
1052
1053 if ((netdev->features & NETIF_F_LRO) && ipv4)
1054 lro_vlan_hwaccel_receive_skb(&enic->lro_mgr,
1055 skb, enic->vlan_group,
1056 vlan, cq_desc);
1057 else
1058 vlan_hwaccel_receive_skb(skb,
1059 enic->vlan_group, vlan);
1060
1061 } else {
1062
1063 if ((netdev->features & NETIF_F_LRO) && ipv4)
1064 lro_receive_skb(&enic->lro_mgr, skb, cq_desc);
1065 else
1066 netif_receive_skb(skb);
1067
1068 }
1069
1070 } else {
1071
1072 /* Buffer overflow
1073 */
1074
1075 dev_kfree_skb_any(skb);
1076 }
1077 }
1078
1079 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1080 u8 type, u16 q_number, u16 completed_index, void *opaque)
1081 {
1082 struct enic *enic = vnic_dev_priv(vdev);
1083
1084 vnic_rq_service(&enic->rq[q_number], cq_desc,
1085 completed_index, VNIC_RQ_RETURN_DESC,
1086 enic_rq_indicate_buf, opaque);
1087
1088 return 0;
1089 }
1090
1091 static int enic_poll(struct napi_struct *napi, int budget)
1092 {
1093 struct enic *enic = container_of(napi, struct enic, napi);
1094 struct net_device *netdev = enic->netdev;
1095 unsigned int rq_work_to_do = budget;
1096 unsigned int wq_work_to_do = -1; /* no limit */
1097 unsigned int work_done, rq_work_done, wq_work_done;
1098 int err;
1099
1100 /* Service RQ (first) and WQ
1101 */
1102
1103 rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1104 rq_work_to_do, enic_rq_service, NULL);
1105
1106 wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1107 wq_work_to_do, enic_wq_service, NULL);
1108
1109 /* Accumulate intr event credits for this polling
1110 * cycle. An intr event is the completion of a
1111 * a WQ or RQ packet.
1112 */
1113
1114 work_done = rq_work_done + wq_work_done;
1115
1116 if (work_done > 0)
1117 vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ],
1118 work_done,
1119 0 /* don't unmask intr */,
1120 0 /* don't reset intr timer */);
1121
1122 err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
1123
1124 /* Buffer allocation failed. Stay in polling
1125 * mode so we can try to fill the ring again.
1126 */
1127
1128 if (err)
1129 rq_work_done = rq_work_to_do;
1130
1131 if (rq_work_done < rq_work_to_do) {
1132
1133 /* Some work done, but not enough to stay in polling,
1134 * flush all LROs and exit polling
1135 */
1136
1137 if (netdev->features & NETIF_F_LRO)
1138 lro_flush_all(&enic->lro_mgr);
1139
1140 napi_complete(napi);
1141 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
1142 }
1143
1144 return rq_work_done;
1145 }
1146
1147 static int enic_poll_msix(struct napi_struct *napi, int budget)
1148 {
1149 struct enic *enic = container_of(napi, struct enic, napi);
1150 struct net_device *netdev = enic->netdev;
1151 unsigned int work_to_do = budget;
1152 unsigned int work_done;
1153 int err;
1154
1155 /* Service RQ
1156 */
1157
1158 work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1159 work_to_do, enic_rq_service, NULL);
1160
1161 /* Return intr event credits for this polling
1162 * cycle. An intr event is the completion of a
1163 * RQ packet.
1164 */
1165
1166 if (work_done > 0)
1167 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ],
1168 work_done,
1169 0 /* don't unmask intr */,
1170 0 /* don't reset intr timer */);
1171
1172 err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
1173
1174 /* Buffer allocation failed. Stay in polling mode
1175 * so we can try to fill the ring again.
1176 */
1177
1178 if (err)
1179 work_done = work_to_do;
1180
1181 if (work_done < work_to_do) {
1182
1183 /* Some work done, but not enough to stay in polling,
1184 * flush all LROs and exit polling
1185 */
1186
1187 if (netdev->features & NETIF_F_LRO)
1188 lro_flush_all(&enic->lro_mgr);
1189
1190 napi_complete(napi);
1191 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
1192 }
1193
1194 return work_done;
1195 }
1196
1197 static void enic_notify_timer(unsigned long data)
1198 {
1199 struct enic *enic = (struct enic *)data;
1200
1201 enic_notify_check(enic);
1202
1203 mod_timer(&enic->notify_timer,
1204 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1205 }
1206
1207 static void enic_free_intr(struct enic *enic)
1208 {
1209 struct net_device *netdev = enic->netdev;
1210 unsigned int i;
1211
1212 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1213 case VNIC_DEV_INTR_MODE_INTX:
1214 free_irq(enic->pdev->irq, netdev);
1215 break;
1216 case VNIC_DEV_INTR_MODE_MSI:
1217 free_irq(enic->pdev->irq, enic);
1218 break;
1219 case VNIC_DEV_INTR_MODE_MSIX:
1220 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1221 if (enic->msix[i].requested)
1222 free_irq(enic->msix_entry[i].vector,
1223 enic->msix[i].devid);
1224 break;
1225 default:
1226 break;
1227 }
1228 }
1229
1230 static int enic_request_intr(struct enic *enic)
1231 {
1232 struct net_device *netdev = enic->netdev;
1233 unsigned int i;
1234 int err = 0;
1235
1236 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1237
1238 case VNIC_DEV_INTR_MODE_INTX:
1239
1240 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1241 IRQF_SHARED, netdev->name, netdev);
1242 break;
1243
1244 case VNIC_DEV_INTR_MODE_MSI:
1245
1246 err = request_irq(enic->pdev->irq, enic_isr_msi,
1247 0, netdev->name, enic);
1248 break;
1249
1250 case VNIC_DEV_INTR_MODE_MSIX:
1251
1252 sprintf(enic->msix[ENIC_MSIX_RQ].devname,
1253 "%.11s-rx-0", netdev->name);
1254 enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq;
1255 enic->msix[ENIC_MSIX_RQ].devid = enic;
1256
1257 sprintf(enic->msix[ENIC_MSIX_WQ].devname,
1258 "%.11s-tx-0", netdev->name);
1259 enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq;
1260 enic->msix[ENIC_MSIX_WQ].devid = enic;
1261
1262 sprintf(enic->msix[ENIC_MSIX_ERR].devname,
1263 "%.11s-err", netdev->name);
1264 enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err;
1265 enic->msix[ENIC_MSIX_ERR].devid = enic;
1266
1267 sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname,
1268 "%.11s-notify", netdev->name);
1269 enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify;
1270 enic->msix[ENIC_MSIX_NOTIFY].devid = enic;
1271
1272 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) {
1273 err = request_irq(enic->msix_entry[i].vector,
1274 enic->msix[i].isr, 0,
1275 enic->msix[i].devname,
1276 enic->msix[i].devid);
1277 if (err) {
1278 enic_free_intr(enic);
1279 break;
1280 }
1281 enic->msix[i].requested = 1;
1282 }
1283
1284 break;
1285
1286 default:
1287 break;
1288 }
1289
1290 return err;
1291 }
1292
1293 static void enic_synchronize_irqs(struct enic *enic)
1294 {
1295 unsigned int i;
1296
1297 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1298 case VNIC_DEV_INTR_MODE_INTX:
1299 case VNIC_DEV_INTR_MODE_MSI:
1300 synchronize_irq(enic->pdev->irq);
1301 break;
1302 case VNIC_DEV_INTR_MODE_MSIX:
1303 for (i = 0; i < enic->intr_count; i++)
1304 synchronize_irq(enic->msix_entry[i].vector);
1305 break;
1306 default:
1307 break;
1308 }
1309 }
1310
1311 static int enic_notify_set(struct enic *enic)
1312 {
1313 int err;
1314
1315 spin_lock(&enic->devcmd_lock);
1316 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1317 case VNIC_DEV_INTR_MODE_INTX:
1318 err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY);
1319 break;
1320 case VNIC_DEV_INTR_MODE_MSIX:
1321 err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY);
1322 break;
1323 default:
1324 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1325 break;
1326 }
1327 spin_unlock(&enic->devcmd_lock);
1328
1329 return err;
1330 }
1331
1332 static void enic_notify_timer_start(struct enic *enic)
1333 {
1334 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1335 case VNIC_DEV_INTR_MODE_MSI:
1336 mod_timer(&enic->notify_timer, jiffies);
1337 break;
1338 default:
1339 /* Using intr for notification for INTx/MSI-X */
1340 break;
1341 };
1342 }
1343
1344 /* rtnl lock is held, process context */
1345 static int enic_open(struct net_device *netdev)
1346 {
1347 struct enic *enic = netdev_priv(netdev);
1348 unsigned int i;
1349 int err;
1350
1351 err = enic_request_intr(enic);
1352 if (err) {
1353 printk(KERN_ERR PFX "%s: Unable to request irq.\n",
1354 netdev->name);
1355 return err;
1356 }
1357
1358 err = enic_notify_set(enic);
1359 if (err) {
1360 printk(KERN_ERR PFX
1361 "%s: Failed to alloc notify buffer, aborting.\n",
1362 netdev->name);
1363 goto err_out_free_intr;
1364 }
1365
1366 for (i = 0; i < enic->rq_count; i++) {
1367 vnic_rq_fill(&enic->rq[i], enic->rq_alloc_buf);
1368 /* Need at least one buffer on ring to get going */
1369 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1370 printk(KERN_ERR PFX
1371 "%s: Unable to alloc receive buffers.\n",
1372 netdev->name);
1373 err = -ENOMEM;
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 spin_lock(&enic->devcmd_lock);
1384 enic_add_station_addr(enic);
1385 spin_unlock(&enic->devcmd_lock);
1386 enic_set_multicast_list(netdev);
1387
1388 netif_wake_queue(netdev);
1389 napi_enable(&enic->napi);
1390 spin_lock(&enic->devcmd_lock);
1391 vnic_dev_enable(enic->vdev);
1392 spin_unlock(&enic->devcmd_lock);
1393
1394 for (i = 0; i < enic->intr_count; i++)
1395 vnic_intr_unmask(&enic->intr[i]);
1396
1397 enic_notify_timer_start(enic);
1398
1399 return 0;
1400
1401 err_out_notify_unset:
1402 spin_lock(&enic->devcmd_lock);
1403 vnic_dev_notify_unset(enic->vdev);
1404 spin_unlock(&enic->devcmd_lock);
1405 err_out_free_intr:
1406 enic_free_intr(enic);
1407
1408 return err;
1409 }
1410
1411 /* rtnl lock is held, process context */
1412 static int enic_stop(struct net_device *netdev)
1413 {
1414 struct enic *enic = netdev_priv(netdev);
1415 unsigned int i;
1416 int err;
1417
1418 for (i = 0; i < enic->intr_count; i++)
1419 vnic_intr_mask(&enic->intr[i]);
1420
1421 enic_synchronize_irqs(enic);
1422
1423 del_timer_sync(&enic->notify_timer);
1424
1425 spin_lock(&enic->devcmd_lock);
1426 vnic_dev_disable(enic->vdev);
1427 spin_unlock(&enic->devcmd_lock);
1428 napi_disable(&enic->napi);
1429 netif_carrier_off(netdev);
1430 netif_tx_disable(netdev);
1431
1432 for (i = 0; i < enic->wq_count; i++) {
1433 err = vnic_wq_disable(&enic->wq[i]);
1434 if (err)
1435 return err;
1436 }
1437 for (i = 0; i < enic->rq_count; i++) {
1438 err = vnic_rq_disable(&enic->rq[i]);
1439 if (err)
1440 return err;
1441 }
1442
1443 spin_lock(&enic->devcmd_lock);
1444 vnic_dev_notify_unset(enic->vdev);
1445 spin_unlock(&enic->devcmd_lock);
1446 enic_free_intr(enic);
1447
1448 for (i = 0; i < enic->wq_count; i++)
1449 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1450 for (i = 0; i < enic->rq_count; i++)
1451 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1452 for (i = 0; i < enic->cq_count; i++)
1453 vnic_cq_clean(&enic->cq[i]);
1454 for (i = 0; i < enic->intr_count; i++)
1455 vnic_intr_clean(&enic->intr[i]);
1456
1457 return 0;
1458 }
1459
1460 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1461 {
1462 struct enic *enic = netdev_priv(netdev);
1463 int running = netif_running(netdev);
1464
1465 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1466 return -EINVAL;
1467
1468 if (running)
1469 enic_stop(netdev);
1470
1471 netdev->mtu = new_mtu;
1472
1473 if (netdev->mtu > enic->port_mtu)
1474 printk(KERN_WARNING PFX
1475 "%s: interface MTU (%d) set higher "
1476 "than port MTU (%d)\n",
1477 netdev->name, netdev->mtu, enic->port_mtu);
1478
1479 if (running)
1480 enic_open(netdev);
1481
1482 return 0;
1483 }
1484
1485 #ifdef CONFIG_NET_POLL_CONTROLLER
1486 static void enic_poll_controller(struct net_device *netdev)
1487 {
1488 struct enic *enic = netdev_priv(netdev);
1489 struct vnic_dev *vdev = enic->vdev;
1490
1491 switch (vnic_dev_get_intr_mode(vdev)) {
1492 case VNIC_DEV_INTR_MODE_MSIX:
1493 enic_isr_msix_rq(enic->pdev->irq, enic);
1494 enic_isr_msix_wq(enic->pdev->irq, enic);
1495 break;
1496 case VNIC_DEV_INTR_MODE_MSI:
1497 enic_isr_msi(enic->pdev->irq, enic);
1498 break;
1499 case VNIC_DEV_INTR_MODE_INTX:
1500 enic_isr_legacy(enic->pdev->irq, netdev);
1501 break;
1502 default:
1503 break;
1504 }
1505 }
1506 #endif
1507
1508 static int enic_dev_wait(struct vnic_dev *vdev,
1509 int (*start)(struct vnic_dev *, int),
1510 int (*finished)(struct vnic_dev *, int *),
1511 int arg)
1512 {
1513 unsigned long time;
1514 int done;
1515 int err;
1516
1517 BUG_ON(in_interrupt());
1518
1519 err = start(vdev, arg);
1520 if (err)
1521 return err;
1522
1523 /* Wait for func to complete...2 seconds max
1524 */
1525
1526 time = jiffies + (HZ * 2);
1527 do {
1528
1529 err = finished(vdev, &done);
1530 if (err)
1531 return err;
1532
1533 if (done)
1534 return 0;
1535
1536 schedule_timeout_uninterruptible(HZ / 10);
1537
1538 } while (time_after(time, jiffies));
1539
1540 return -ETIMEDOUT;
1541 }
1542
1543 static int enic_dev_open(struct enic *enic)
1544 {
1545 int err;
1546
1547 err = enic_dev_wait(enic->vdev, vnic_dev_open,
1548 vnic_dev_open_done, 0);
1549 if (err)
1550 printk(KERN_ERR PFX
1551 "vNIC device open failed, err %d.\n", err);
1552
1553 return err;
1554 }
1555
1556 static int enic_dev_soft_reset(struct enic *enic)
1557 {
1558 int err;
1559
1560 err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset,
1561 vnic_dev_soft_reset_done, 0);
1562 if (err)
1563 printk(KERN_ERR PFX
1564 "vNIC soft reset failed, err %d.\n", err);
1565
1566 return err;
1567 }
1568
1569 static int enic_set_niccfg(struct enic *enic)
1570 {
1571 const u8 rss_default_cpu = 0;
1572 const u8 rss_hash_type = 0;
1573 const u8 rss_hash_bits = 0;
1574 const u8 rss_base_cpu = 0;
1575 const u8 rss_enable = 0;
1576 const u8 tso_ipid_split_en = 0;
1577 const u8 ig_vlan_strip_en = 1;
1578
1579 /* Enable VLAN tag stripping. RSS not enabled (yet).
1580 */
1581
1582 return enic_set_nic_cfg(enic,
1583 rss_default_cpu, rss_hash_type,
1584 rss_hash_bits, rss_base_cpu,
1585 rss_enable, tso_ipid_split_en,
1586 ig_vlan_strip_en);
1587 }
1588
1589 static void enic_reset(struct work_struct *work)
1590 {
1591 struct enic *enic = container_of(work, struct enic, reset);
1592
1593 if (!netif_running(enic->netdev))
1594 return;
1595
1596 rtnl_lock();
1597
1598 spin_lock(&enic->devcmd_lock);
1599 vnic_dev_hang_notify(enic->vdev);
1600 spin_unlock(&enic->devcmd_lock);
1601
1602 enic_stop(enic->netdev);
1603 enic_dev_soft_reset(enic);
1604 vnic_dev_init(enic->vdev, 0);
1605 enic_reset_mcaddrs(enic);
1606 enic_init_vnic_resources(enic);
1607 enic_set_niccfg(enic);
1608 enic_open(enic->netdev);
1609
1610 rtnl_unlock();
1611 }
1612
1613 static int enic_set_intr_mode(struct enic *enic)
1614 {
1615 unsigned int n = 1;
1616 unsigned int m = 1;
1617 unsigned int i;
1618
1619 /* Set interrupt mode (INTx, MSI, MSI-X) depending
1620 * system capabilities.
1621 *
1622 * Try MSI-X first
1623 *
1624 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1625 * (the second to last INTR is used for WQ/RQ errors)
1626 * (the last INTR is used for notifications)
1627 */
1628
1629 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
1630 for (i = 0; i < n + m + 2; i++)
1631 enic->msix_entry[i].entry = i;
1632
1633 if (enic->config.intr_mode < 1 &&
1634 enic->rq_count >= n &&
1635 enic->wq_count >= m &&
1636 enic->cq_count >= n + m &&
1637 enic->intr_count >= n + m + 2 &&
1638 !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
1639
1640 enic->rq_count = n;
1641 enic->wq_count = m;
1642 enic->cq_count = n + m;
1643 enic->intr_count = n + m + 2;
1644
1645 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX);
1646
1647 return 0;
1648 }
1649
1650 /* Next try MSI
1651 *
1652 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
1653 */
1654
1655 if (enic->config.intr_mode < 2 &&
1656 enic->rq_count >= 1 &&
1657 enic->wq_count >= 1 &&
1658 enic->cq_count >= 2 &&
1659 enic->intr_count >= 1 &&
1660 !pci_enable_msi(enic->pdev)) {
1661
1662 enic->rq_count = 1;
1663 enic->wq_count = 1;
1664 enic->cq_count = 2;
1665 enic->intr_count = 1;
1666
1667 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
1668
1669 return 0;
1670 }
1671
1672 /* Next try INTx
1673 *
1674 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
1675 * (the first INTR is used for WQ/RQ)
1676 * (the second INTR is used for WQ/RQ errors)
1677 * (the last INTR is used for notifications)
1678 */
1679
1680 if (enic->config.intr_mode < 3 &&
1681 enic->rq_count >= 1 &&
1682 enic->wq_count >= 1 &&
1683 enic->cq_count >= 2 &&
1684 enic->intr_count >= 3) {
1685
1686 enic->rq_count = 1;
1687 enic->wq_count = 1;
1688 enic->cq_count = 2;
1689 enic->intr_count = 3;
1690
1691 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
1692
1693 return 0;
1694 }
1695
1696 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1697
1698 return -EINVAL;
1699 }
1700
1701 static void enic_clear_intr_mode(struct enic *enic)
1702 {
1703 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1704 case VNIC_DEV_INTR_MODE_MSIX:
1705 pci_disable_msix(enic->pdev);
1706 break;
1707 case VNIC_DEV_INTR_MODE_MSI:
1708 pci_disable_msi(enic->pdev);
1709 break;
1710 default:
1711 break;
1712 }
1713
1714 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1715 }
1716
1717 static const struct net_device_ops enic_netdev_ops = {
1718 .ndo_open = enic_open,
1719 .ndo_stop = enic_stop,
1720 .ndo_start_xmit = enic_hard_start_xmit,
1721 .ndo_get_stats = enic_get_stats,
1722 .ndo_validate_addr = eth_validate_addr,
1723 .ndo_set_mac_address = eth_mac_addr,
1724 .ndo_set_multicast_list = enic_set_multicast_list,
1725 .ndo_change_mtu = enic_change_mtu,
1726 .ndo_vlan_rx_register = enic_vlan_rx_register,
1727 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
1728 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
1729 .ndo_tx_timeout = enic_tx_timeout,
1730 #ifdef CONFIG_NET_POLL_CONTROLLER
1731 .ndo_poll_controller = enic_poll_controller,
1732 #endif
1733 };
1734
1735 void enic_dev_deinit(struct enic *enic)
1736 {
1737 netif_napi_del(&enic->napi);
1738 enic_free_vnic_resources(enic);
1739 enic_clear_intr_mode(enic);
1740 }
1741
1742 int enic_dev_init(struct enic *enic)
1743 {
1744 struct net_device *netdev = enic->netdev;
1745 int err;
1746
1747 /* Get vNIC configuration
1748 */
1749
1750 err = enic_get_vnic_config(enic);
1751 if (err) {
1752 printk(KERN_ERR PFX
1753 "Get vNIC configuration failed, aborting.\n");
1754 return err;
1755 }
1756
1757 /* Get available resource counts
1758 */
1759
1760 enic_get_res_counts(enic);
1761
1762 /* Set interrupt mode based on resource counts and system
1763 * capabilities
1764 */
1765
1766 err = enic_set_intr_mode(enic);
1767 if (err) {
1768 printk(KERN_ERR PFX
1769 "Failed to set intr mode, aborting.\n");
1770 return err;
1771 }
1772
1773 /* Allocate and configure vNIC resources
1774 */
1775
1776 err = enic_alloc_vnic_resources(enic);
1777 if (err) {
1778 printk(KERN_ERR PFX
1779 "Failed to alloc vNIC resources, aborting.\n");
1780 goto err_out_free_vnic_resources;
1781 }
1782
1783 enic_init_vnic_resources(enic);
1784
1785 err = enic_set_rq_alloc_buf(enic);
1786 if (err) {
1787 printk(KERN_ERR PFX
1788 "Failed to set RQ buffer allocator, aborting.\n");
1789 goto err_out_free_vnic_resources;
1790 }
1791
1792 err = enic_set_niccfg(enic);
1793 if (err) {
1794 printk(KERN_ERR PFX
1795 "Failed to config nic, aborting.\n");
1796 goto err_out_free_vnic_resources;
1797 }
1798
1799 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1800 default:
1801 netif_napi_add(netdev, &enic->napi, enic_poll, 64);
1802 break;
1803 case VNIC_DEV_INTR_MODE_MSIX:
1804 netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64);
1805 break;
1806 }
1807
1808 return 0;
1809
1810 err_out_free_vnic_resources:
1811 enic_clear_intr_mode(enic);
1812 enic_free_vnic_resources(enic);
1813
1814 return err;
1815 }
1816
1817 static void enic_iounmap(struct enic *enic)
1818 {
1819 unsigned int i;
1820
1821 for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
1822 if (enic->bar[i].vaddr)
1823 iounmap(enic->bar[i].vaddr);
1824 }
1825
1826 static int __devinit enic_probe(struct pci_dev *pdev,
1827 const struct pci_device_id *ent)
1828 {
1829 struct net_device *netdev;
1830 struct enic *enic;
1831 int using_dac = 0;
1832 unsigned int i;
1833 int err;
1834
1835 /* Allocate net device structure and initialize. Private
1836 * instance data is initialized to zero.
1837 */
1838
1839 netdev = alloc_etherdev(sizeof(struct enic));
1840 if (!netdev) {
1841 printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
1842 return -ENOMEM;
1843 }
1844
1845 pci_set_drvdata(pdev, netdev);
1846
1847 SET_NETDEV_DEV(netdev, &pdev->dev);
1848
1849 enic = netdev_priv(netdev);
1850 enic->netdev = netdev;
1851 enic->pdev = pdev;
1852
1853 /* Setup PCI resources
1854 */
1855
1856 err = pci_enable_device(pdev);
1857 if (err) {
1858 printk(KERN_ERR PFX
1859 "Cannot enable PCI device, aborting.\n");
1860 goto err_out_free_netdev;
1861 }
1862
1863 err = pci_request_regions(pdev, DRV_NAME);
1864 if (err) {
1865 printk(KERN_ERR PFX
1866 "Cannot request PCI regions, aborting.\n");
1867 goto err_out_disable_device;
1868 }
1869
1870 pci_set_master(pdev);
1871
1872 /* Query PCI controller on system for DMA addressing
1873 * limitation for the device. Try 40-bit first, and
1874 * fail to 32-bit.
1875 */
1876
1877 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
1878 if (err) {
1879 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
1880 if (err) {
1881 printk(KERN_ERR PFX
1882 "No usable DMA configuration, aborting.\n");
1883 goto err_out_release_regions;
1884 }
1885 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
1886 if (err) {
1887 printk(KERN_ERR PFX
1888 "Unable to obtain 32-bit DMA "
1889 "for consistent allocations, aborting.\n");
1890 goto err_out_release_regions;
1891 }
1892 } else {
1893 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
1894 if (err) {
1895 printk(KERN_ERR PFX
1896 "Unable to obtain 40-bit DMA "
1897 "for consistent allocations, aborting.\n");
1898 goto err_out_release_regions;
1899 }
1900 using_dac = 1;
1901 }
1902
1903 /* Map vNIC resources from BAR0-5
1904 */
1905
1906 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
1907 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
1908 continue;
1909 enic->bar[i].len = pci_resource_len(pdev, i);
1910 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
1911 if (!enic->bar[i].vaddr) {
1912 printk(KERN_ERR PFX
1913 "Cannot memory-map BAR %d, aborting.\n", i);
1914 err = -ENODEV;
1915 goto err_out_iounmap;
1916 }
1917 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
1918 }
1919
1920 /* Register vNIC device
1921 */
1922
1923 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
1924 ARRAY_SIZE(enic->bar));
1925 if (!enic->vdev) {
1926 printk(KERN_ERR PFX
1927 "vNIC registration failed, aborting.\n");
1928 err = -ENODEV;
1929 goto err_out_iounmap;
1930 }
1931
1932 /* Issue device open to get device in known state
1933 */
1934
1935 err = enic_dev_open(enic);
1936 if (err) {
1937 printk(KERN_ERR PFX
1938 "vNIC dev open failed, aborting.\n");
1939 goto err_out_vnic_unregister;
1940 }
1941
1942 /* Issue device init to initialize the vnic-to-switch link.
1943 * We'll start with carrier off and wait for link UP
1944 * notification later to turn on carrier. We don't need
1945 * to wait here for the vnic-to-switch link initialization
1946 * to complete; link UP notification is the indication that
1947 * the process is complete.
1948 */
1949
1950 netif_carrier_off(netdev);
1951
1952 err = vnic_dev_init(enic->vdev, 0);
1953 if (err) {
1954 printk(KERN_ERR PFX
1955 "vNIC dev init failed, aborting.\n");
1956 goto err_out_dev_close;
1957 }
1958
1959 err = enic_dev_init(enic);
1960 if (err) {
1961 printk(KERN_ERR PFX
1962 "Device initialization failed, aborting.\n");
1963 goto err_out_dev_close;
1964 }
1965
1966 /* Setup notification timer, HW reset task, and locks
1967 */
1968
1969 init_timer(&enic->notify_timer);
1970 enic->notify_timer.function = enic_notify_timer;
1971 enic->notify_timer.data = (unsigned long)enic;
1972
1973 INIT_WORK(&enic->reset, enic_reset);
1974
1975 for (i = 0; i < enic->wq_count; i++)
1976 spin_lock_init(&enic->wq_lock[i]);
1977
1978 spin_lock_init(&enic->devcmd_lock);
1979
1980 /* Register net device
1981 */
1982
1983 enic->port_mtu = enic->config.mtu;
1984 (void)enic_change_mtu(netdev, enic->port_mtu);
1985
1986 err = enic_set_mac_addr(netdev, enic->mac_addr);
1987 if (err) {
1988 printk(KERN_ERR PFX
1989 "Invalid MAC address, aborting.\n");
1990 goto err_out_dev_deinit;
1991 }
1992
1993 netdev->netdev_ops = &enic_netdev_ops;
1994 netdev->watchdog_timeo = 2 * HZ;
1995 netdev->ethtool_ops = &enic_ethtool_ops;
1996
1997 netdev->features |= NETIF_F_HW_VLAN_TX |
1998 NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER;
1999 if (ENIC_SETTING(enic, TXCSUM))
2000 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2001 if (ENIC_SETTING(enic, TSO))
2002 netdev->features |= NETIF_F_TSO |
2003 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2004 if (ENIC_SETTING(enic, LRO))
2005 netdev->features |= NETIF_F_LRO;
2006 if (using_dac)
2007 netdev->features |= NETIF_F_HIGHDMA;
2008
2009 enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
2010
2011 enic->lro_mgr.max_aggr = ENIC_LRO_MAX_AGGR;
2012 enic->lro_mgr.max_desc = ENIC_LRO_MAX_DESC;
2013 enic->lro_mgr.lro_arr = enic->lro_desc;
2014 enic->lro_mgr.get_skb_header = enic_get_skb_header;
2015 enic->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
2016 enic->lro_mgr.dev = netdev;
2017 enic->lro_mgr.ip_summed = CHECKSUM_COMPLETE;
2018 enic->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
2019
2020 err = register_netdev(netdev);
2021 if (err) {
2022 printk(KERN_ERR PFX
2023 "Cannot register net device, aborting.\n");
2024 goto err_out_dev_deinit;
2025 }
2026
2027 return 0;
2028
2029 err_out_dev_deinit:
2030 enic_dev_deinit(enic);
2031 err_out_dev_close:
2032 vnic_dev_close(enic->vdev);
2033 err_out_vnic_unregister:
2034 vnic_dev_unregister(enic->vdev);
2035 err_out_iounmap:
2036 enic_iounmap(enic);
2037 err_out_release_regions:
2038 pci_release_regions(pdev);
2039 err_out_disable_device:
2040 pci_disable_device(pdev);
2041 err_out_free_netdev:
2042 pci_set_drvdata(pdev, NULL);
2043 free_netdev(netdev);
2044
2045 return err;
2046 }
2047
2048 static void __devexit enic_remove(struct pci_dev *pdev)
2049 {
2050 struct net_device *netdev = pci_get_drvdata(pdev);
2051
2052 if (netdev) {
2053 struct enic *enic = netdev_priv(netdev);
2054
2055 flush_scheduled_work();
2056 unregister_netdev(netdev);
2057 enic_dev_deinit(enic);
2058 vnic_dev_close(enic->vdev);
2059 vnic_dev_unregister(enic->vdev);
2060 enic_iounmap(enic);
2061 pci_release_regions(pdev);
2062 pci_disable_device(pdev);
2063 pci_set_drvdata(pdev, NULL);
2064 free_netdev(netdev);
2065 }
2066 }
2067
2068 static struct pci_driver enic_driver = {
2069 .name = DRV_NAME,
2070 .id_table = enic_id_table,
2071 .probe = enic_probe,
2072 .remove = __devexit_p(enic_remove),
2073 };
2074
2075 static int __init enic_init_module(void)
2076 {
2077 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2078
2079 return pci_register_driver(&enic_driver);
2080 }
2081
2082 static void __exit enic_cleanup_module(void)
2083 {
2084 pci_unregister_driver(&enic_driver);
2085 }
2086
2087 module_init(enic_init_module);
2088 module_exit(enic_cleanup_module);
Linux kernel - Deliverables
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