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x86/amd-iommu: Add per IOMMU reference counting
[linux/fpc-iii.git] / drivers / net / enic / enic_main.c
blobd69d52ed77266bd6fb1bd9619698e4f44474667d
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 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
775 unsigned int mc_count = netdev->mc_count;
776 unsigned int i, j;
777
778 if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS)
779 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
780
781 spin_lock(&enic->devcmd_lock);
782
783 vnic_dev_packet_filter(enic->vdev, directed,
784 multicast, broadcast, promisc, allmulti);
785
786 /* Is there an easier way? Trying to minimize to
787 * calls to add/del multicast addrs. We keep the
788 * addrs from the last call in enic->mc_addr and
789 * look for changes to add/del.
790 */
791
792 for (i = 0; list && i < mc_count; i++) {
793 memcpy(mc_addr[i], list->dmi_addr, ETH_ALEN);
794 list = list->next;
795 }
796
797 for (i = 0; i < enic->mc_count; i++) {
798 for (j = 0; j < mc_count; j++)
799 if (compare_ether_addr(enic->mc_addr[i],
800 mc_addr[j]) == 0)
801 break;
802 if (j == mc_count)
803 enic_del_multicast_addr(enic, enic->mc_addr[i]);
804 }
805
806 for (i = 0; i < mc_count; i++) {
807 for (j = 0; j < enic->mc_count; j++)
808 if (compare_ether_addr(mc_addr[i],
809 enic->mc_addr[j]) == 0)
810 break;
811 if (j == enic->mc_count)
812 enic_add_multicast_addr(enic, mc_addr[i]);
813 }
814
815 /* Save the list to compare against next time
816 */
817
818 for (i = 0; i < mc_count; i++)
819 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
820
821 enic->mc_count = mc_count;
822
823 spin_unlock(&enic->devcmd_lock);
824 }
825
826 /* rtnl lock is held */
827 static void enic_vlan_rx_register(struct net_device *netdev,
828 struct vlan_group *vlan_group)
829 {
830 struct enic *enic = netdev_priv(netdev);
831 enic->vlan_group = vlan_group;
832 }
833
834 /* rtnl lock is held */
835 static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
836 {
837 struct enic *enic = netdev_priv(netdev);
838
839 spin_lock(&enic->devcmd_lock);
840 enic_add_vlan(enic, vid);
841 spin_unlock(&enic->devcmd_lock);
842 }
843
844 /* rtnl lock is held */
845 static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
846 {
847 struct enic *enic = netdev_priv(netdev);
848
849 spin_lock(&enic->devcmd_lock);
850 enic_del_vlan(enic, vid);
851 spin_unlock(&enic->devcmd_lock);
852 }
853
854 /* netif_tx_lock held, BHs disabled */
855 static void enic_tx_timeout(struct net_device *netdev)
856 {
857 struct enic *enic = netdev_priv(netdev);
858 schedule_work(&enic->reset);
859 }
860
861 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
862 {
863 struct enic *enic = vnic_dev_priv(rq->vdev);
864
865 if (!buf->os_buf)
866 return;
867
868 pci_unmap_single(enic->pdev, buf->dma_addr,
869 buf->len, PCI_DMA_FROMDEVICE);
870 dev_kfree_skb_any(buf->os_buf);
871 }
872
873 static inline struct sk_buff *enic_rq_alloc_skb(struct net_device *netdev,
874 unsigned int size)
875 {
876 struct sk_buff *skb;
877
878 skb = netdev_alloc_skb(netdev, size + NET_IP_ALIGN);
879
880 if (skb)
881 skb_reserve(skb, NET_IP_ALIGN);
882
883 return skb;
884 }
885
886 static int enic_rq_alloc_buf(struct vnic_rq *rq)
887 {
888 struct enic *enic = vnic_dev_priv(rq->vdev);
889 struct net_device *netdev = enic->netdev;
890 struct sk_buff *skb;
891 unsigned int len = netdev->mtu + ETH_HLEN;
892 unsigned int os_buf_index = 0;
893 dma_addr_t dma_addr;
894
895 skb = enic_rq_alloc_skb(netdev, len);
896 if (!skb)
897 return -ENOMEM;
898
899 dma_addr = pci_map_single(enic->pdev, skb->data,
900 len, PCI_DMA_FROMDEVICE);
901
902 enic_queue_rq_desc(rq, skb, os_buf_index,
903 dma_addr, len);
904
905 return 0;
906 }
907
908 static int enic_rq_alloc_buf_a1(struct vnic_rq *rq)
909 {
910 struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
911
912 if (vnic_rq_posting_soon(rq)) {
913
914 /* SW workaround for A0 HW erratum: if we're just about
915 * to write posted_index, insert a dummy desc
916 * of type resvd
917 */
918
919 rq_enet_desc_enc(desc, 0, RQ_ENET_TYPE_RESV2, 0);
920 vnic_rq_post(rq, 0, 0, 0, 0);
921 } else {
922 return enic_rq_alloc_buf(rq);
923 }
924
925 return 0;
926 }
927
928 static int enic_set_rq_alloc_buf(struct enic *enic)
929 {
930 enum vnic_dev_hw_version hw_ver;
931 int err;
932
933 err = vnic_dev_hw_version(enic->vdev, &hw_ver);
934 if (err)
935 return err;
936
937 switch (hw_ver) {
938 case VNIC_DEV_HW_VER_A1:
939 enic->rq_alloc_buf = enic_rq_alloc_buf_a1;
940 break;
941 case VNIC_DEV_HW_VER_A2:
942 case VNIC_DEV_HW_VER_UNKNOWN:
943 enic->rq_alloc_buf = enic_rq_alloc_buf;
944 break;
945 default:
946 return -ENODEV;
947 }
948
949 return 0;
950 }
951
952 static int enic_get_skb_header(struct sk_buff *skb, void **iphdr,
953 void **tcph, u64 *hdr_flags, void *priv)
954 {
955 struct cq_enet_rq_desc *cq_desc = priv;
956 unsigned int ip_len;
957 struct iphdr *iph;
958
959 u8 type, color, eop, sop, ingress_port, vlan_stripped;
960 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
961 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
962 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
963 u8 packet_error;
964 u16 q_number, completed_index, bytes_written, vlan, checksum;
965 u32 rss_hash;
966
967 cq_enet_rq_desc_dec(cq_desc,
968 &type, &color, &q_number, &completed_index,
969 &ingress_port, &fcoe, &eop, &sop, &rss_type,
970 &csum_not_calc, &rss_hash, &bytes_written,
971 &packet_error, &vlan_stripped, &vlan, &checksum,
972 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
973 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
974 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
975 &fcs_ok);
976
977 if (!(ipv4 && tcp && !ipv4_fragment))
978 return -1;
979
980 skb_reset_network_header(skb);
981 iph = ip_hdr(skb);
982
983 ip_len = ip_hdrlen(skb);
984 skb_set_transport_header(skb, ip_len);
985
986 /* check if ip header and tcp header are complete */
987 if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
988 return -1;
989
990 *hdr_flags = LRO_IPV4 | LRO_TCP;
991 *tcph = tcp_hdr(skb);
992 *iphdr = iph;
993
994 return 0;
995 }
996
997 static void enic_rq_indicate_buf(struct vnic_rq *rq,
998 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
999 int skipped, void *opaque)
1000 {
1001 struct enic *enic = vnic_dev_priv(rq->vdev);
1002 struct net_device *netdev = enic->netdev;
1003 struct sk_buff *skb;
1004
1005 u8 type, color, eop, sop, ingress_port, vlan_stripped;
1006 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1007 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1008 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1009 u8 packet_error;
1010 u16 q_number, completed_index, bytes_written, vlan, checksum;
1011 u32 rss_hash;
1012
1013 if (skipped)
1014 return;
1015
1016 skb = buf->os_buf;
1017 prefetch(skb->data - NET_IP_ALIGN);
1018 pci_unmap_single(enic->pdev, buf->dma_addr,
1019 buf->len, PCI_DMA_FROMDEVICE);
1020
1021 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1022 &type, &color, &q_number, &completed_index,
1023 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1024 &csum_not_calc, &rss_hash, &bytes_written,
1025 &packet_error, &vlan_stripped, &vlan, &checksum,
1026 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1027 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1028 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1029 &fcs_ok);
1030
1031 if (packet_error) {
1032
1033 if (!fcs_ok) {
1034 if (bytes_written > 0)
1035 enic->rq_bad_fcs++;
1036 else if (bytes_written == 0)
1037 enic->rq_truncated_pkts++;
1038 }
1039
1040 dev_kfree_skb_any(skb);
1041
1042 return;
1043 }
1044
1045 if (eop && bytes_written > 0) {
1046
1047 /* Good receive
1048 */
1049
1050 skb_put(skb, bytes_written);
1051 skb->protocol = eth_type_trans(skb, netdev);
1052
1053 if (enic->csum_rx_enabled && !csum_not_calc) {
1054 skb->csum = htons(checksum);
1055 skb->ip_summed = CHECKSUM_COMPLETE;
1056 }
1057
1058 skb->dev = netdev;
1059
1060 if (enic->vlan_group && vlan_stripped) {
1061
1062 if ((netdev->features & NETIF_F_LRO) && ipv4)
1063 lro_vlan_hwaccel_receive_skb(&enic->lro_mgr,
1064 skb, enic->vlan_group,
1065 vlan, cq_desc);
1066 else
1067 vlan_hwaccel_receive_skb(skb,
1068 enic->vlan_group, vlan);
1069
1070 } else {
1071
1072 if ((netdev->features & NETIF_F_LRO) && ipv4)
1073 lro_receive_skb(&enic->lro_mgr, skb, cq_desc);
1074 else
1075 netif_receive_skb(skb);
1076
1077 }
1078
1079 } else {
1080
1081 /* Buffer overflow
1082 */
1083
1084 dev_kfree_skb_any(skb);
1085 }
1086 }
1087
1088 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1089 u8 type, u16 q_number, u16 completed_index, void *opaque)
1090 {
1091 struct enic *enic = vnic_dev_priv(vdev);
1092
1093 vnic_rq_service(&enic->rq[q_number], cq_desc,
1094 completed_index, VNIC_RQ_RETURN_DESC,
1095 enic_rq_indicate_buf, opaque);
1096
1097 return 0;
1098 }
1099
1100 static void enic_rq_drop_buf(struct vnic_rq *rq,
1101 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1102 int skipped, void *opaque)
1103 {
1104 struct enic *enic = vnic_dev_priv(rq->vdev);
1105 struct sk_buff *skb = buf->os_buf;
1106
1107 if (skipped)
1108 return;
1109
1110 pci_unmap_single(enic->pdev, buf->dma_addr,
1111 buf->len, PCI_DMA_FROMDEVICE);
1112
1113 dev_kfree_skb_any(skb);
1114 }
1115
1116 static int enic_rq_service_drop(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1117 u8 type, u16 q_number, u16 completed_index, void *opaque)
1118 {
1119 struct enic *enic = vnic_dev_priv(vdev);
1120
1121 vnic_rq_service(&enic->rq[q_number], cq_desc,
1122 completed_index, VNIC_RQ_RETURN_DESC,
1123 enic_rq_drop_buf, opaque);
1124
1125 return 0;
1126 }
1127
1128 static int enic_poll(struct napi_struct *napi, int budget)
1129 {
1130 struct enic *enic = container_of(napi, struct enic, napi);
1131 struct net_device *netdev = enic->netdev;
1132 unsigned int rq_work_to_do = budget;
1133 unsigned int wq_work_to_do = -1; /* no limit */
1134 unsigned int work_done, rq_work_done, wq_work_done;
1135
1136 /* Service RQ (first) and WQ
1137 */
1138
1139 rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1140 rq_work_to_do, enic_rq_service, NULL);
1141
1142 wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1143 wq_work_to_do, enic_wq_service, NULL);
1144
1145 /* Accumulate intr event credits for this polling
1146 * cycle. An intr event is the completion of a
1147 * a WQ or RQ packet.
1148 */
1149
1150 work_done = rq_work_done + wq_work_done;
1151
1152 if (work_done > 0)
1153 vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ],
1154 work_done,
1155 0 /* don't unmask intr */,
1156 0 /* don't reset intr timer */);
1157
1158 if (rq_work_done > 0) {
1159
1160 /* Replenish RQ
1161 */
1162
1163 vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
1164
1165 } else {
1166
1167 /* If no work done, flush all LROs and exit polling
1168 */
1169
1170 if (netdev->features & NETIF_F_LRO)
1171 lro_flush_all(&enic->lro_mgr);
1172
1173 napi_complete(napi);
1174 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
1175 }
1176
1177 return rq_work_done;
1178 }
1179
1180 static int enic_poll_msix(struct napi_struct *napi, int budget)
1181 {
1182 struct enic *enic = container_of(napi, struct enic, napi);
1183 struct net_device *netdev = enic->netdev;
1184 unsigned int work_to_do = budget;
1185 unsigned int work_done;
1186
1187 /* Service RQ
1188 */
1189
1190 work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1191 work_to_do, enic_rq_service, NULL);
1192
1193 if (work_done > 0) {
1194
1195 /* Replenish RQ
1196 */
1197
1198 vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
1199
1200 /* Return intr event credits for this polling
1201 * cycle. An intr event is the completion of a
1202 * RQ packet.
1203 */
1204
1205 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ],
1206 work_done,
1207 0 /* don't unmask intr */,
1208 0 /* don't reset intr timer */);
1209 } else {
1210
1211 /* If no work done, flush all LROs and exit polling
1212 */
1213
1214 if (netdev->features & NETIF_F_LRO)
1215 lro_flush_all(&enic->lro_mgr);
1216
1217 napi_complete(napi);
1218 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
1219 }
1220
1221 return work_done;
1222 }
1223
1224 static void enic_notify_timer(unsigned long data)
1225 {
1226 struct enic *enic = (struct enic *)data;
1227
1228 enic_notify_check(enic);
1229
1230 mod_timer(&enic->notify_timer,
1231 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1232 }
1233
1234 static void enic_free_intr(struct enic *enic)
1235 {
1236 struct net_device *netdev = enic->netdev;
1237 unsigned int i;
1238
1239 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1240 case VNIC_DEV_INTR_MODE_INTX:
1241 free_irq(enic->pdev->irq, netdev);
1242 break;
1243 case VNIC_DEV_INTR_MODE_MSI:
1244 free_irq(enic->pdev->irq, enic);
1245 break;
1246 case VNIC_DEV_INTR_MODE_MSIX:
1247 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1248 if (enic->msix[i].requested)
1249 free_irq(enic->msix_entry[i].vector,
1250 enic->msix[i].devid);
1251 break;
1252 default:
1253 break;
1254 }
1255 }
1256
1257 static int enic_request_intr(struct enic *enic)
1258 {
1259 struct net_device *netdev = enic->netdev;
1260 unsigned int i;
1261 int err = 0;
1262
1263 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1264
1265 case VNIC_DEV_INTR_MODE_INTX:
1266
1267 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1268 IRQF_SHARED, netdev->name, netdev);
1269 break;
1270
1271 case VNIC_DEV_INTR_MODE_MSI:
1272
1273 err = request_irq(enic->pdev->irq, enic_isr_msi,
1274 0, netdev->name, enic);
1275 break;
1276
1277 case VNIC_DEV_INTR_MODE_MSIX:
1278
1279 sprintf(enic->msix[ENIC_MSIX_RQ].devname,
1280 "%.11s-rx-0", netdev->name);
1281 enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq;
1282 enic->msix[ENIC_MSIX_RQ].devid = enic;
1283
1284 sprintf(enic->msix[ENIC_MSIX_WQ].devname,
1285 "%.11s-tx-0", netdev->name);
1286 enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq;
1287 enic->msix[ENIC_MSIX_WQ].devid = enic;
1288
1289 sprintf(enic->msix[ENIC_MSIX_ERR].devname,
1290 "%.11s-err", netdev->name);
1291 enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err;
1292 enic->msix[ENIC_MSIX_ERR].devid = enic;
1293
1294 sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname,
1295 "%.11s-notify", netdev->name);
1296 enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify;
1297 enic->msix[ENIC_MSIX_NOTIFY].devid = enic;
1298
1299 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) {
1300 err = request_irq(enic->msix_entry[i].vector,
1301 enic->msix[i].isr, 0,
1302 enic->msix[i].devname,
1303 enic->msix[i].devid);
1304 if (err) {
1305 enic_free_intr(enic);
1306 break;
1307 }
1308 enic->msix[i].requested = 1;
1309 }
1310
1311 break;
1312
1313 default:
1314 break;
1315 }
1316
1317 return err;
1318 }
1319
1320 static int enic_notify_set(struct enic *enic)
1321 {
1322 int err;
1323
1324 spin_lock(&enic->devcmd_lock);
1325 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1326 case VNIC_DEV_INTR_MODE_INTX:
1327 err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY);
1328 break;
1329 case VNIC_DEV_INTR_MODE_MSIX:
1330 err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY);
1331 break;
1332 default:
1333 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1334 break;
1335 }
1336 spin_unlock(&enic->devcmd_lock);
1337
1338 return err;
1339 }
1340
1341 static void enic_notify_timer_start(struct enic *enic)
1342 {
1343 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1344 case VNIC_DEV_INTR_MODE_MSI:
1345 mod_timer(&enic->notify_timer, jiffies);
1346 break;
1347 default:
1348 /* Using intr for notification for INTx/MSI-X */
1349 break;
1350 };
1351 }
1352
1353 /* rtnl lock is held, process context */
1354 static int enic_open(struct net_device *netdev)
1355 {
1356 struct enic *enic = netdev_priv(netdev);
1357 unsigned int i;
1358 int err;
1359
1360 err = enic_request_intr(enic);
1361 if (err) {
1362 printk(KERN_ERR PFX "%s: Unable to request irq.\n",
1363 netdev->name);
1364 return err;
1365 }
1366
1367 err = enic_notify_set(enic);
1368 if (err) {
1369 printk(KERN_ERR PFX
1370 "%s: Failed to alloc notify buffer, aborting.\n",
1371 netdev->name);
1372 goto err_out_free_intr;
1373 }
1374
1375 for (i = 0; i < enic->rq_count; i++) {
1376 err = vnic_rq_fill(&enic->rq[i], enic->rq_alloc_buf);
1377 if (err) {
1378 printk(KERN_ERR PFX
1379 "%s: Unable to alloc receive buffers.\n",
1380 netdev->name);
1381 goto err_out_notify_unset;
1382 }
1383 }
1384
1385 for (i = 0; i < enic->wq_count; i++)
1386 vnic_wq_enable(&enic->wq[i]);
1387 for (i = 0; i < enic->rq_count; i++)
1388 vnic_rq_enable(&enic->rq[i]);
1389
1390 spin_lock(&enic->devcmd_lock);
1391 enic_add_station_addr(enic);
1392 spin_unlock(&enic->devcmd_lock);
1393 enic_set_multicast_list(netdev);
1394
1395 netif_wake_queue(netdev);
1396 napi_enable(&enic->napi);
1397 spin_lock(&enic->devcmd_lock);
1398 vnic_dev_enable(enic->vdev);
1399 spin_unlock(&enic->devcmd_lock);
1400
1401 for (i = 0; i < enic->intr_count; i++)
1402 vnic_intr_unmask(&enic->intr[i]);
1403
1404 enic_notify_timer_start(enic);
1405
1406 return 0;
1407
1408 err_out_notify_unset:
1409 spin_lock(&enic->devcmd_lock);
1410 vnic_dev_notify_unset(enic->vdev);
1411 spin_unlock(&enic->devcmd_lock);
1412 err_out_free_intr:
1413 enic_free_intr(enic);
1414
1415 return err;
1416 }
1417
1418 /* rtnl lock is held, process context */
1419 static int enic_stop(struct net_device *netdev)
1420 {
1421 struct enic *enic = netdev_priv(netdev);
1422 unsigned int i;
1423 int err;
1424
1425 del_timer_sync(&enic->notify_timer);
1426
1427 spin_lock(&enic->devcmd_lock);
1428 vnic_dev_disable(enic->vdev);
1429 spin_unlock(&enic->devcmd_lock);
1430 napi_disable(&enic->napi);
1431 netif_stop_queue(netdev);
1432
1433 for (i = 0; i < enic->intr_count; i++)
1434 vnic_intr_mask(&enic->intr[i]);
1435
1436 for (i = 0; i < enic->wq_count; i++) {
1437 err = vnic_wq_disable(&enic->wq[i]);
1438 if (err)
1439 return err;
1440 }
1441 for (i = 0; i < enic->rq_count; i++) {
1442 err = vnic_rq_disable(&enic->rq[i]);
1443 if (err)
1444 return err;
1445 }
1446
1447 spin_lock(&enic->devcmd_lock);
1448 vnic_dev_notify_unset(enic->vdev);
1449 spin_unlock(&enic->devcmd_lock);
1450 enic_free_intr(enic);
1451
1452 (void)vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1453 -1, enic_rq_service_drop, NULL);
1454 (void)vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1455 -1, enic_wq_service, NULL);
1456
1457 for (i = 0; i < enic->wq_count; i++)
1458 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1459 for (i = 0; i < enic->rq_count; i++)
1460 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1461 for (i = 0; i < enic->cq_count; i++)
1462 vnic_cq_clean(&enic->cq[i]);
1463 for (i = 0; i < enic->intr_count; i++)
1464 vnic_intr_clean(&enic->intr[i]);
1465
1466 return 0;
1467 }
1468
1469 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1470 {
1471 struct enic *enic = netdev_priv(netdev);
1472 int running = netif_running(netdev);
1473
1474 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1475 return -EINVAL;
1476
1477 if (running)
1478 enic_stop(netdev);
1479
1480 netdev->mtu = new_mtu;
1481
1482 if (netdev->mtu > enic->port_mtu)
1483 printk(KERN_WARNING PFX
1484 "%s: interface MTU (%d) set higher "
1485 "than port MTU (%d)\n",
1486 netdev->name, netdev->mtu, enic->port_mtu);
1487
1488 if (running)
1489 enic_open(netdev);
1490
1491 return 0;
1492 }
1493
1494 #ifdef CONFIG_NET_POLL_CONTROLLER
1495 static void enic_poll_controller(struct net_device *netdev)
1496 {
1497 struct enic *enic = netdev_priv(netdev);
1498 struct vnic_dev *vdev = enic->vdev;
1499
1500 switch (vnic_dev_get_intr_mode(vdev)) {
1501 case VNIC_DEV_INTR_MODE_MSIX:
1502 enic_isr_msix_rq(enic->pdev->irq, enic);
1503 enic_isr_msix_wq(enic->pdev->irq, enic);
1504 break;
1505 case VNIC_DEV_INTR_MODE_MSI:
1506 enic_isr_msi(enic->pdev->irq, enic);
1507 break;
1508 case VNIC_DEV_INTR_MODE_INTX:
1509 enic_isr_legacy(enic->pdev->irq, netdev);
1510 break;
1511 default:
1512 break;
1513 }
1514 }
1515 #endif
1516
1517 static int enic_dev_wait(struct vnic_dev *vdev,
1518 int (*start)(struct vnic_dev *, int),
1519 int (*finished)(struct vnic_dev *, int *),
1520 int arg)
1521 {
1522 unsigned long time;
1523 int done;
1524 int err;
1525
1526 BUG_ON(in_interrupt());
1527
1528 err = start(vdev, arg);
1529 if (err)
1530 return err;
1531
1532 /* Wait for func to complete...2 seconds max
1533 */
1534
1535 time = jiffies + (HZ * 2);
1536 do {
1537
1538 err = finished(vdev, &done);
1539 if (err)
1540 return err;
1541
1542 if (done)
1543 return 0;
1544
1545 schedule_timeout_uninterruptible(HZ / 10);
1546
1547 } while (time_after(time, jiffies));
1548
1549 return -ETIMEDOUT;
1550 }
1551
1552 static int enic_dev_open(struct enic *enic)
1553 {
1554 int err;
1555
1556 err = enic_dev_wait(enic->vdev, vnic_dev_open,
1557 vnic_dev_open_done, 0);
1558 if (err)
1559 printk(KERN_ERR PFX
1560 "vNIC device open failed, err %d.\n", err);
1561
1562 return err;
1563 }
1564
1565 static int enic_dev_soft_reset(struct enic *enic)
1566 {
1567 int err;
1568
1569 err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset,
1570 vnic_dev_soft_reset_done, 0);
1571 if (err)
1572 printk(KERN_ERR PFX
1573 "vNIC soft reset failed, err %d.\n", err);
1574
1575 return err;
1576 }
1577
1578 static int enic_set_niccfg(struct enic *enic)
1579 {
1580 const u8 rss_default_cpu = 0;
1581 const u8 rss_hash_type = 0;
1582 const u8 rss_hash_bits = 0;
1583 const u8 rss_base_cpu = 0;
1584 const u8 rss_enable = 0;
1585 const u8 tso_ipid_split_en = 0;
1586 const u8 ig_vlan_strip_en = 1;
1587
1588 /* Enable VLAN tag stripping. RSS not enabled (yet).
1589 */
1590
1591 return enic_set_nic_cfg(enic,
1592 rss_default_cpu, rss_hash_type,
1593 rss_hash_bits, rss_base_cpu,
1594 rss_enable, tso_ipid_split_en,
1595 ig_vlan_strip_en);
1596 }
1597
1598 static void enic_reset(struct work_struct *work)
1599 {
1600 struct enic *enic = container_of(work, struct enic, reset);
1601
1602 if (!netif_running(enic->netdev))
1603 return;
1604
1605 rtnl_lock();
1606
1607 spin_lock(&enic->devcmd_lock);
1608 vnic_dev_hang_notify(enic->vdev);
1609 spin_unlock(&enic->devcmd_lock);
1610
1611 enic_stop(enic->netdev);
1612 enic_dev_soft_reset(enic);
1613 vnic_dev_init(enic->vdev, 0);
1614 enic_reset_mcaddrs(enic);
1615 enic_init_vnic_resources(enic);
1616 enic_set_niccfg(enic);
1617 enic_open(enic->netdev);
1618
1619 rtnl_unlock();
1620 }
1621
1622 static int enic_set_intr_mode(struct enic *enic)
1623 {
1624 unsigned int n = 1;
1625 unsigned int m = 1;
1626 unsigned int i;
1627
1628 /* Set interrupt mode (INTx, MSI, MSI-X) depending
1629 * system capabilities.
1630 *
1631 * Try MSI-X first
1632 *
1633 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1634 * (the second to last INTR is used for WQ/RQ errors)
1635 * (the last INTR is used for notifications)
1636 */
1637
1638 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
1639 for (i = 0; i < n + m + 2; i++)
1640 enic->msix_entry[i].entry = i;
1641
1642 if (enic->config.intr_mode < 1 &&
1643 enic->rq_count >= n &&
1644 enic->wq_count >= m &&
1645 enic->cq_count >= n + m &&
1646 enic->intr_count >= n + m + 2 &&
1647 !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
1648
1649 enic->rq_count = n;
1650 enic->wq_count = m;
1651 enic->cq_count = n + m;
1652 enic->intr_count = n + m + 2;
1653
1654 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX);
1655
1656 return 0;
1657 }
1658
1659 /* Next try MSI
1660 *
1661 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
1662 */
1663
1664 if (enic->config.intr_mode < 2 &&
1665 enic->rq_count >= 1 &&
1666 enic->wq_count >= 1 &&
1667 enic->cq_count >= 2 &&
1668 enic->intr_count >= 1 &&
1669 !pci_enable_msi(enic->pdev)) {
1670
1671 enic->rq_count = 1;
1672 enic->wq_count = 1;
1673 enic->cq_count = 2;
1674 enic->intr_count = 1;
1675
1676 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
1677
1678 return 0;
1679 }
1680
1681 /* Next try INTx
1682 *
1683 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
1684 * (the first INTR is used for WQ/RQ)
1685 * (the second INTR is used for WQ/RQ errors)
1686 * (the last INTR is used for notifications)
1687 */
1688
1689 if (enic->config.intr_mode < 3 &&
1690 enic->rq_count >= 1 &&
1691 enic->wq_count >= 1 &&
1692 enic->cq_count >= 2 &&
1693 enic->intr_count >= 3) {
1694
1695 enic->rq_count = 1;
1696 enic->wq_count = 1;
1697 enic->cq_count = 2;
1698 enic->intr_count = 3;
1699
1700 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
1701
1702 return 0;
1703 }
1704
1705 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1706
1707 return -EINVAL;
1708 }
1709
1710 static void enic_clear_intr_mode(struct enic *enic)
1711 {
1712 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1713 case VNIC_DEV_INTR_MODE_MSIX:
1714 pci_disable_msix(enic->pdev);
1715 break;
1716 case VNIC_DEV_INTR_MODE_MSI:
1717 pci_disable_msi(enic->pdev);
1718 break;
1719 default:
1720 break;
1721 }
1722
1723 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1724 }
1725
1726 static const struct net_device_ops enic_netdev_ops = {
1727 .ndo_open = enic_open,
1728 .ndo_stop = enic_stop,
1729 .ndo_start_xmit = enic_hard_start_xmit,
1730 .ndo_get_stats = enic_get_stats,
1731 .ndo_validate_addr = eth_validate_addr,
1732 .ndo_set_mac_address = eth_mac_addr,
1733 .ndo_set_multicast_list = enic_set_multicast_list,
1734 .ndo_change_mtu = enic_change_mtu,
1735 .ndo_vlan_rx_register = enic_vlan_rx_register,
1736 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
1737 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
1738 .ndo_tx_timeout = enic_tx_timeout,
1739 #ifdef CONFIG_NET_POLL_CONTROLLER
1740 .ndo_poll_controller = enic_poll_controller,
1741 #endif
1742 };
1743
1744 void enic_dev_deinit(struct enic *enic)
1745 {
1746 netif_napi_del(&enic->napi);
1747 enic_free_vnic_resources(enic);
1748 enic_clear_intr_mode(enic);
1749 }
1750
1751 int enic_dev_init(struct enic *enic)
1752 {
1753 struct net_device *netdev = enic->netdev;
1754 int err;
1755
1756 /* Get vNIC configuration
1757 */
1758
1759 err = enic_get_vnic_config(enic);
1760 if (err) {
1761 printk(KERN_ERR PFX
1762 "Get vNIC configuration failed, aborting.\n");
1763 return err;
1764 }
1765
1766 /* Get available resource counts
1767 */
1768
1769 enic_get_res_counts(enic);
1770
1771 /* Set interrupt mode based on resource counts and system
1772 * capabilities
1773 */
1774
1775 err = enic_set_intr_mode(enic);
1776 if (err) {
1777 printk(KERN_ERR PFX
1778 "Failed to set intr mode, aborting.\n");
1779 return err;
1780 }
1781
1782 /* Allocate and configure vNIC resources
1783 */
1784
1785 err = enic_alloc_vnic_resources(enic);
1786 if (err) {
1787 printk(KERN_ERR PFX
1788 "Failed to alloc vNIC resources, aborting.\n");
1789 goto err_out_free_vnic_resources;
1790 }
1791
1792 enic_init_vnic_resources(enic);
1793
1794 err = enic_set_rq_alloc_buf(enic);
1795 if (err) {
1796 printk(KERN_ERR PFX
1797 "Failed to set RQ buffer allocator, aborting.\n");
1798 goto err_out_free_vnic_resources;
1799 }
1800
1801 err = enic_set_niccfg(enic);
1802 if (err) {
1803 printk(KERN_ERR PFX
1804 "Failed to config nic, aborting.\n");
1805 goto err_out_free_vnic_resources;
1806 }
1807
1808 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1809 default:
1810 netif_napi_add(netdev, &enic->napi, enic_poll, 64);
1811 break;
1812 case VNIC_DEV_INTR_MODE_MSIX:
1813 netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64);
1814 break;
1815 }
1816
1817 return 0;
1818
1819 err_out_free_vnic_resources:
1820 enic_clear_intr_mode(enic);
1821 enic_free_vnic_resources(enic);
1822
1823 return err;
1824 }
1825
1826 static void enic_iounmap(struct enic *enic)
1827 {
1828 unsigned int i;
1829
1830 for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
1831 if (enic->bar[i].vaddr)
1832 iounmap(enic->bar[i].vaddr);
1833 }
1834
1835 static int __devinit enic_probe(struct pci_dev *pdev,
1836 const struct pci_device_id *ent)
1837 {
1838 struct net_device *netdev;
1839 struct enic *enic;
1840 int using_dac = 0;
1841 unsigned int i;
1842 int err;
1843
1844 /* Allocate net device structure and initialize. Private
1845 * instance data is initialized to zero.
1846 */
1847
1848 netdev = alloc_etherdev(sizeof(struct enic));
1849 if (!netdev) {
1850 printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
1851 return -ENOMEM;
1852 }
1853
1854 pci_set_drvdata(pdev, netdev);
1855
1856 SET_NETDEV_DEV(netdev, &pdev->dev);
1857
1858 enic = netdev_priv(netdev);
1859 enic->netdev = netdev;
1860 enic->pdev = pdev;
1861
1862 /* Setup PCI resources
1863 */
1864
1865 err = pci_enable_device(pdev);
1866 if (err) {
1867 printk(KERN_ERR PFX
1868 "Cannot enable PCI device, aborting.\n");
1869 goto err_out_free_netdev;
1870 }
1871
1872 err = pci_request_regions(pdev, DRV_NAME);
1873 if (err) {
1874 printk(KERN_ERR PFX
1875 "Cannot request PCI regions, aborting.\n");
1876 goto err_out_disable_device;
1877 }
1878
1879 pci_set_master(pdev);
1880
1881 /* Query PCI controller on system for DMA addressing
1882 * limitation for the device. Try 40-bit first, and
1883 * fail to 32-bit.
1884 */
1885
1886 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
1887 if (err) {
1888 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
1889 if (err) {
1890 printk(KERN_ERR PFX
1891 "No usable DMA configuration, aborting.\n");
1892 goto err_out_release_regions;
1893 }
1894 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
1895 if (err) {
1896 printk(KERN_ERR PFX
1897 "Unable to obtain 32-bit DMA "
1898 "for consistent allocations, aborting.\n");
1899 goto err_out_release_regions;
1900 }
1901 } else {
1902 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
1903 if (err) {
1904 printk(KERN_ERR PFX
1905 "Unable to obtain 40-bit DMA "
1906 "for consistent allocations, aborting.\n");
1907 goto err_out_release_regions;
1908 }
1909 using_dac = 1;
1910 }
1911
1912 /* Map vNIC resources from BAR0-5
1913 */
1914
1915 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
1916 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
1917 continue;
1918 enic->bar[i].len = pci_resource_len(pdev, i);
1919 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
1920 if (!enic->bar[i].vaddr) {
1921 printk(KERN_ERR PFX
1922 "Cannot memory-map BAR %d, aborting.\n", i);
1923 err = -ENODEV;
1924 goto err_out_iounmap;
1925 }
1926 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
1927 }
1928
1929 /* Register vNIC device
1930 */
1931
1932 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
1933 ARRAY_SIZE(enic->bar));
1934 if (!enic->vdev) {
1935 printk(KERN_ERR PFX
1936 "vNIC registration failed, aborting.\n");
1937 err = -ENODEV;
1938 goto err_out_iounmap;
1939 }
1940
1941 /* Issue device open to get device in known state
1942 */
1943
1944 err = enic_dev_open(enic);
1945 if (err) {
1946 printk(KERN_ERR PFX
1947 "vNIC dev open failed, aborting.\n");
1948 goto err_out_vnic_unregister;
1949 }
1950
1951 /* Issue device init to initialize the vnic-to-switch link.
1952 * We'll start with carrier off and wait for link UP
1953 * notification later to turn on carrier. We don't need
1954 * to wait here for the vnic-to-switch link initialization
1955 * to complete; link UP notification is the indication that
1956 * the process is complete.
1957 */
1958
1959 netif_carrier_off(netdev);
1960
1961 err = vnic_dev_init(enic->vdev, 0);
1962 if (err) {
1963 printk(KERN_ERR PFX
1964 "vNIC dev init failed, aborting.\n");
1965 goto err_out_dev_close;
1966 }
1967
1968 err = enic_dev_init(enic);
1969 if (err) {
1970 printk(KERN_ERR PFX
1971 "Device initialization failed, aborting.\n");
1972 goto err_out_dev_close;
1973 }
1974
1975 /* Setup notification timer, HW reset task, and locks
1976 */
1977
1978 init_timer(&enic->notify_timer);
1979 enic->notify_timer.function = enic_notify_timer;
1980 enic->notify_timer.data = (unsigned long)enic;
1981
1982 INIT_WORK(&enic->reset, enic_reset);
1983
1984 for (i = 0; i < enic->wq_count; i++)
1985 spin_lock_init(&enic->wq_lock[i]);
1986
1987 spin_lock_init(&enic->devcmd_lock);
1988
1989 /* Register net device
1990 */
1991
1992 enic->port_mtu = enic->config.mtu;
1993 (void)enic_change_mtu(netdev, enic->port_mtu);
1994
1995 err = enic_set_mac_addr(netdev, enic->mac_addr);
1996 if (err) {
1997 printk(KERN_ERR PFX
1998 "Invalid MAC address, aborting.\n");
1999 goto err_out_dev_deinit;
2000 }
2001
2002 netdev->netdev_ops = &enic_netdev_ops;
2003 netdev->watchdog_timeo = 2 * HZ;
2004 netdev->ethtool_ops = &enic_ethtool_ops;
2005
2006 netdev->features |= NETIF_F_HW_VLAN_TX |
2007 NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER;
2008 if (ENIC_SETTING(enic, TXCSUM))
2009 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2010 if (ENIC_SETTING(enic, TSO))
2011 netdev->features |= NETIF_F_TSO |
2012 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2013 if (ENIC_SETTING(enic, LRO))
2014 netdev->features |= NETIF_F_LRO;
2015 if (using_dac)
2016 netdev->features |= NETIF_F_HIGHDMA;
2017
2018 enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
2019
2020 enic->lro_mgr.max_aggr = ENIC_LRO_MAX_AGGR;
2021 enic->lro_mgr.max_desc = ENIC_LRO_MAX_DESC;
2022 enic->lro_mgr.lro_arr = enic->lro_desc;
2023 enic->lro_mgr.get_skb_header = enic_get_skb_header;
2024 enic->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
2025 enic->lro_mgr.dev = netdev;
2026 enic->lro_mgr.ip_summed = CHECKSUM_COMPLETE;
2027 enic->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
2028
2029 err = register_netdev(netdev);
2030 if (err) {
2031 printk(KERN_ERR PFX
2032 "Cannot register net device, aborting.\n");
2033 goto err_out_dev_deinit;
2034 }
2035
2036 return 0;
2037
2038 err_out_dev_deinit:
2039 enic_dev_deinit(enic);
2040 err_out_dev_close:
2041 vnic_dev_close(enic->vdev);
2042 err_out_vnic_unregister:
2043 vnic_dev_unregister(enic->vdev);
2044 err_out_iounmap:
2045 enic_iounmap(enic);
2046 err_out_release_regions:
2047 pci_release_regions(pdev);
2048 err_out_disable_device:
2049 pci_disable_device(pdev);
2050 err_out_free_netdev:
2051 pci_set_drvdata(pdev, NULL);
2052 free_netdev(netdev);
2053
2054 return err;
2055 }
2056
2057 static void __devexit enic_remove(struct pci_dev *pdev)
2058 {
2059 struct net_device *netdev = pci_get_drvdata(pdev);
2060
2061 if (netdev) {
2062 struct enic *enic = netdev_priv(netdev);
2063
2064 flush_scheduled_work();
2065 unregister_netdev(netdev);
2066 enic_dev_deinit(enic);
2067 vnic_dev_close(enic->vdev);
2068 vnic_dev_unregister(enic->vdev);
2069 enic_iounmap(enic);
2070 pci_release_regions(pdev);
2071 pci_disable_device(pdev);
2072 pci_set_drvdata(pdev, NULL);
2073 free_netdev(netdev);
2074 }
2075 }
2076
2077 static struct pci_driver enic_driver = {
2078 .name = DRV_NAME,
2079 .id_table = enic_id_table,
2080 .probe = enic_probe,
2081 .remove = __devexit_p(enic_remove),
2082 };
2083
2084 static int __init enic_init_module(void)
2085 {
2086 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2087
2088 return pci_register_driver(&enic_driver);
2089 }
2090
2091 static void __exit enic_cleanup_module(void)
2092 {
2093 pci_unregister_driver(&enic_driver);
2094 }
2095
2096 module_init(enic_init_module);
2097 module_exit(enic_cleanup_module);
Linux with added FPC-III support