?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
enic: Feature Add: Replace LRO with GRO
[linux-2.6/libata-dev.git] / drivers / net / enic / enic_main.c
blobc2b848f58c2962db333e6d11f838671abd05f2b6
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/if_link.h>
33 #include <linux/ethtool.h>
34 #include <linux/in.h>
35 #include <linux/ip.h>
36 #include <linux/ipv6.h>
37 #include <linux/tcp.h>
38 #include <net/ip6_checksum.h>
39
40 #include "cq_enet_desc.h"
41 #include "vnic_dev.h"
42 #include "vnic_intr.h"
43 #include "vnic_stats.h"
44 #include "vnic_vic.h"
45 #include "enic_res.h"
46 #include "enic.h"
47
48 #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
49 #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS)
50 #define MAX_TSO (1 << 16)
51 #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
52
53 #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */
54 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */
55
56 /* Supported devices */
57 static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
58 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
59 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
60 { 0, } /* end of table */
61 };
62
63 MODULE_DESCRIPTION(DRV_DESCRIPTION);
64 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
65 MODULE_LICENSE("GPL");
66 MODULE_VERSION(DRV_VERSION);
67 MODULE_DEVICE_TABLE(pci, enic_id_table);
68
69 struct enic_stat {
70 char name[ETH_GSTRING_LEN];
71 unsigned int offset;
72 };
73
74 #define ENIC_TX_STAT(stat) \
75 { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
76 #define ENIC_RX_STAT(stat) \
77 { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
78
79 static const struct enic_stat enic_tx_stats[] = {
80 ENIC_TX_STAT(tx_frames_ok),
81 ENIC_TX_STAT(tx_unicast_frames_ok),
82 ENIC_TX_STAT(tx_multicast_frames_ok),
83 ENIC_TX_STAT(tx_broadcast_frames_ok),
84 ENIC_TX_STAT(tx_bytes_ok),
85 ENIC_TX_STAT(tx_unicast_bytes_ok),
86 ENIC_TX_STAT(tx_multicast_bytes_ok),
87 ENIC_TX_STAT(tx_broadcast_bytes_ok),
88 ENIC_TX_STAT(tx_drops),
89 ENIC_TX_STAT(tx_errors),
90 ENIC_TX_STAT(tx_tso),
91 };
92
93 static const struct enic_stat enic_rx_stats[] = {
94 ENIC_RX_STAT(rx_frames_ok),
95 ENIC_RX_STAT(rx_frames_total),
96 ENIC_RX_STAT(rx_unicast_frames_ok),
97 ENIC_RX_STAT(rx_multicast_frames_ok),
98 ENIC_RX_STAT(rx_broadcast_frames_ok),
99 ENIC_RX_STAT(rx_bytes_ok),
100 ENIC_RX_STAT(rx_unicast_bytes_ok),
101 ENIC_RX_STAT(rx_multicast_bytes_ok),
102 ENIC_RX_STAT(rx_broadcast_bytes_ok),
103 ENIC_RX_STAT(rx_drop),
104 ENIC_RX_STAT(rx_no_bufs),
105 ENIC_RX_STAT(rx_errors),
106 ENIC_RX_STAT(rx_rss),
107 ENIC_RX_STAT(rx_crc_errors),
108 ENIC_RX_STAT(rx_frames_64),
109 ENIC_RX_STAT(rx_frames_127),
110 ENIC_RX_STAT(rx_frames_255),
111 ENIC_RX_STAT(rx_frames_511),
112 ENIC_RX_STAT(rx_frames_1023),
113 ENIC_RX_STAT(rx_frames_1518),
114 ENIC_RX_STAT(rx_frames_to_max),
115 };
116
117 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
118 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
119
120 static int enic_is_dynamic(struct enic *enic)
121 {
122 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
123 }
124
125 static int enic_get_settings(struct net_device *netdev,
126 struct ethtool_cmd *ecmd)
127 {
128 struct enic *enic = netdev_priv(netdev);
129
130 ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
131 ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
132 ecmd->port = PORT_FIBRE;
133 ecmd->transceiver = XCVR_EXTERNAL;
134
135 if (netif_carrier_ok(netdev)) {
136 ecmd->speed = vnic_dev_port_speed(enic->vdev);
137 ecmd->duplex = DUPLEX_FULL;
138 } else {
139 ecmd->speed = -1;
140 ecmd->duplex = -1;
141 }
142
143 ecmd->autoneg = AUTONEG_DISABLE;
144
145 return 0;
146 }
147
148 static void enic_get_drvinfo(struct net_device *netdev,
149 struct ethtool_drvinfo *drvinfo)
150 {
151 struct enic *enic = netdev_priv(netdev);
152 struct vnic_devcmd_fw_info *fw_info;
153
154 spin_lock(&enic->devcmd_lock);
155 vnic_dev_fw_info(enic->vdev, &fw_info);
156 spin_unlock(&enic->devcmd_lock);
157
158 strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
159 strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
160 strncpy(drvinfo->fw_version, fw_info->fw_version,
161 sizeof(drvinfo->fw_version));
162 strncpy(drvinfo->bus_info, pci_name(enic->pdev),
163 sizeof(drvinfo->bus_info));
164 }
165
166 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
167 {
168 unsigned int i;
169
170 switch (stringset) {
171 case ETH_SS_STATS:
172 for (i = 0; i < enic_n_tx_stats; i++) {
173 memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
174 data += ETH_GSTRING_LEN;
175 }
176 for (i = 0; i < enic_n_rx_stats; i++) {
177 memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
178 data += ETH_GSTRING_LEN;
179 }
180 break;
181 }
182 }
183
184 static int enic_get_sset_count(struct net_device *netdev, int sset)
185 {
186 switch (sset) {
187 case ETH_SS_STATS:
188 return enic_n_tx_stats + enic_n_rx_stats;
189 default:
190 return -EOPNOTSUPP;
191 }
192 }
193
194 static void enic_get_ethtool_stats(struct net_device *netdev,
195 struct ethtool_stats *stats, u64 *data)
196 {
197 struct enic *enic = netdev_priv(netdev);
198 struct vnic_stats *vstats;
199 unsigned int i;
200
201 spin_lock(&enic->devcmd_lock);
202 vnic_dev_stats_dump(enic->vdev, &vstats);
203 spin_unlock(&enic->devcmd_lock);
204
205 for (i = 0; i < enic_n_tx_stats; i++)
206 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
207 for (i = 0; i < enic_n_rx_stats; i++)
208 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
209 }
210
211 static u32 enic_get_rx_csum(struct net_device *netdev)
212 {
213 struct enic *enic = netdev_priv(netdev);
214 return enic->csum_rx_enabled;
215 }
216
217 static int enic_set_rx_csum(struct net_device *netdev, u32 data)
218 {
219 struct enic *enic = netdev_priv(netdev);
220
221 if (data && !ENIC_SETTING(enic, RXCSUM))
222 return -EINVAL;
223
224 enic->csum_rx_enabled = !!data;
225
226 return 0;
227 }
228
229 static int enic_set_tx_csum(struct net_device *netdev, u32 data)
230 {
231 struct enic *enic = netdev_priv(netdev);
232
233 if (data && !ENIC_SETTING(enic, TXCSUM))
234 return -EINVAL;
235
236 if (data)
237 netdev->features |= NETIF_F_HW_CSUM;
238 else
239 netdev->features &= ~NETIF_F_HW_CSUM;
240
241 return 0;
242 }
243
244 static int enic_set_tso(struct net_device *netdev, u32 data)
245 {
246 struct enic *enic = netdev_priv(netdev);
247
248 if (data && !ENIC_SETTING(enic, TSO))
249 return -EINVAL;
250
251 if (data)
252 netdev->features |=
253 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
254 else
255 netdev->features &=
256 ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN);
257
258 return 0;
259 }
260
261 static u32 enic_get_msglevel(struct net_device *netdev)
262 {
263 struct enic *enic = netdev_priv(netdev);
264 return enic->msg_enable;
265 }
266
267 static void enic_set_msglevel(struct net_device *netdev, u32 value)
268 {
269 struct enic *enic = netdev_priv(netdev);
270 enic->msg_enable = value;
271 }
272
273 static int enic_get_coalesce(struct net_device *netdev,
274 struct ethtool_coalesce *ecmd)
275 {
276 struct enic *enic = netdev_priv(netdev);
277
278 ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
279 ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
280
281 return 0;
282 }
283
284 static int enic_set_coalesce(struct net_device *netdev,
285 struct ethtool_coalesce *ecmd)
286 {
287 struct enic *enic = netdev_priv(netdev);
288 u32 tx_coalesce_usecs;
289 u32 rx_coalesce_usecs;
290
291 tx_coalesce_usecs = min_t(u32,
292 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
293 ecmd->tx_coalesce_usecs);
294 rx_coalesce_usecs = min_t(u32,
295 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
296 ecmd->rx_coalesce_usecs);
297
298 switch (vnic_dev_get_intr_mode(enic->vdev)) {
299 case VNIC_DEV_INTR_MODE_INTX:
300 if (tx_coalesce_usecs != rx_coalesce_usecs)
301 return -EINVAL;
302
303 vnic_intr_coalescing_timer_set(&enic->intr[ENIC_INTX_WQ_RQ],
304 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
305 break;
306 case VNIC_DEV_INTR_MODE_MSI:
307 if (tx_coalesce_usecs != rx_coalesce_usecs)
308 return -EINVAL;
309
310 vnic_intr_coalescing_timer_set(&enic->intr[0],
311 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
312 break;
313 case VNIC_DEV_INTR_MODE_MSIX:
314 vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_WQ],
315 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
316 vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_RQ],
317 INTR_COALESCE_USEC_TO_HW(rx_coalesce_usecs));
318 break;
319 default:
320 break;
321 }
322
323 enic->tx_coalesce_usecs = tx_coalesce_usecs;
324 enic->rx_coalesce_usecs = rx_coalesce_usecs;
325
326 return 0;
327 }
328
329 static const struct ethtool_ops enic_ethtool_ops = {
330 .get_settings = enic_get_settings,
331 .get_drvinfo = enic_get_drvinfo,
332 .get_msglevel = enic_get_msglevel,
333 .set_msglevel = enic_set_msglevel,
334 .get_link = ethtool_op_get_link,
335 .get_strings = enic_get_strings,
336 .get_sset_count = enic_get_sset_count,
337 .get_ethtool_stats = enic_get_ethtool_stats,
338 .get_rx_csum = enic_get_rx_csum,
339 .set_rx_csum = enic_set_rx_csum,
340 .get_tx_csum = ethtool_op_get_tx_csum,
341 .set_tx_csum = enic_set_tx_csum,
342 .get_sg = ethtool_op_get_sg,
343 .set_sg = ethtool_op_set_sg,
344 .get_tso = ethtool_op_get_tso,
345 .set_tso = enic_set_tso,
346 .get_coalesce = enic_get_coalesce,
347 .set_coalesce = enic_set_coalesce,
348 .get_flags = ethtool_op_get_flags,
349 .set_flags = ethtool_op_set_flags,
350 };
351
352 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
353 {
354 struct enic *enic = vnic_dev_priv(wq->vdev);
355
356 if (buf->sop)
357 pci_unmap_single(enic->pdev, buf->dma_addr,
358 buf->len, PCI_DMA_TODEVICE);
359 else
360 pci_unmap_page(enic->pdev, buf->dma_addr,
361 buf->len, PCI_DMA_TODEVICE);
362
363 if (buf->os_buf)
364 dev_kfree_skb_any(buf->os_buf);
365 }
366
367 static void enic_wq_free_buf(struct vnic_wq *wq,
368 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
369 {
370 enic_free_wq_buf(wq, buf);
371 }
372
373 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
374 u8 type, u16 q_number, u16 completed_index, void *opaque)
375 {
376 struct enic *enic = vnic_dev_priv(vdev);
377
378 spin_lock(&enic->wq_lock[q_number]);
379
380 vnic_wq_service(&enic->wq[q_number], cq_desc,
381 completed_index, enic_wq_free_buf,
382 opaque);
383
384 if (netif_queue_stopped(enic->netdev) &&
385 vnic_wq_desc_avail(&enic->wq[q_number]) >=
386 (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
387 netif_wake_queue(enic->netdev);
388
389 spin_unlock(&enic->wq_lock[q_number]);
390
391 return 0;
392 }
393
394 static void enic_log_q_error(struct enic *enic)
395 {
396 unsigned int i;
397 u32 error_status;
398
399 for (i = 0; i < enic->wq_count; i++) {
400 error_status = vnic_wq_error_status(&enic->wq[i]);
401 if (error_status)
402 printk(KERN_ERR PFX "%s: WQ[%d] error_status %d\n",
403 enic->netdev->name, i, error_status);
404 }
405
406 for (i = 0; i < enic->rq_count; i++) {
407 error_status = vnic_rq_error_status(&enic->rq[i]);
408 if (error_status)
409 printk(KERN_ERR PFX "%s: RQ[%d] error_status %d\n",
410 enic->netdev->name, i, error_status);
411 }
412 }
413
414 static void enic_link_check(struct enic *enic)
415 {
416 int link_status = vnic_dev_link_status(enic->vdev);
417 int carrier_ok = netif_carrier_ok(enic->netdev);
418
419 if (link_status && !carrier_ok) {
420 printk(KERN_INFO PFX "%s: Link UP\n", enic->netdev->name);
421 netif_carrier_on(enic->netdev);
422 } else if (!link_status && carrier_ok) {
423 printk(KERN_INFO PFX "%s: Link DOWN\n", enic->netdev->name);
424 netif_carrier_off(enic->netdev);
425 }
426 }
427
428 static void enic_mtu_check(struct enic *enic)
429 {
430 u32 mtu = vnic_dev_mtu(enic->vdev);
431
432 if (mtu && mtu != enic->port_mtu) {
433 enic->port_mtu = mtu;
434 if (mtu < enic->netdev->mtu)
435 printk(KERN_WARNING PFX
436 "%s: interface MTU (%d) set higher "
437 "than switch port MTU (%d)\n",
438 enic->netdev->name, enic->netdev->mtu, mtu);
439 }
440 }
441
442 static void enic_msglvl_check(struct enic *enic)
443 {
444 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
445
446 if (msg_enable != enic->msg_enable) {
447 printk(KERN_INFO PFX "%s: msg lvl changed from 0x%x to 0x%x\n",
448 enic->netdev->name, enic->msg_enable, msg_enable);
449 enic->msg_enable = msg_enable;
450 }
451 }
452
453 static void enic_notify_check(struct enic *enic)
454 {
455 enic_msglvl_check(enic);
456 enic_mtu_check(enic);
457 enic_link_check(enic);
458 }
459
460 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
461
462 static irqreturn_t enic_isr_legacy(int irq, void *data)
463 {
464 struct net_device *netdev = data;
465 struct enic *enic = netdev_priv(netdev);
466 u32 pba;
467
468 vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]);
469
470 pba = vnic_intr_legacy_pba(enic->legacy_pba);
471 if (!pba) {
472 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
473 return IRQ_NONE; /* not our interrupt */
474 }
475
476 if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY)) {
477 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_NOTIFY]);
478 enic_notify_check(enic);
479 }
480
481 if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) {
482 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_ERR]);
483 enic_log_q_error(enic);
484 /* schedule recovery from WQ/RQ error */
485 schedule_work(&enic->reset);
486 return IRQ_HANDLED;
487 }
488
489 if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) {
490 if (napi_schedule_prep(&enic->napi))
491 __napi_schedule(&enic->napi);
492 } else {
493 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
494 }
495
496 return IRQ_HANDLED;
497 }
498
499 static irqreturn_t enic_isr_msi(int irq, void *data)
500 {
501 struct enic *enic = data;
502
503 /* With MSI, there is no sharing of interrupts, so this is
504 * our interrupt and there is no need to ack it. The device
505 * is not providing per-vector masking, so the OS will not
506 * write to PCI config space to mask/unmask the interrupt.
507 * We're using mask_on_assertion for MSI, so the device
508 * automatically masks the interrupt when the interrupt is
509 * generated. Later, when exiting polling, the interrupt
510 * will be unmasked (see enic_poll).
511 *
512 * Also, the device uses the same PCIe Traffic Class (TC)
513 * for Memory Write data and MSI, so there are no ordering
514 * issues; the MSI will always arrive at the Root Complex
515 * _after_ corresponding Memory Writes (i.e. descriptor
516 * writes).
517 */
518
519 napi_schedule(&enic->napi);
520
521 return IRQ_HANDLED;
522 }
523
524 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
525 {
526 struct enic *enic = data;
527
528 /* schedule NAPI polling for RQ cleanup */
529 napi_schedule(&enic->napi);
530
531 return IRQ_HANDLED;
532 }
533
534 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
535 {
536 struct enic *enic = data;
537 unsigned int wq_work_to_do = -1; /* no limit */
538 unsigned int wq_work_done;
539
540 wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
541 wq_work_to_do, enic_wq_service, NULL);
542
543 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ],
544 wq_work_done,
545 1 /* unmask intr */,
546 1 /* reset intr timer */);
547
548 return IRQ_HANDLED;
549 }
550
551 static irqreturn_t enic_isr_msix_err(int irq, void *data)
552 {
553 struct enic *enic = data;
554
555 vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_ERR]);
556
557 enic_log_q_error(enic);
558
559 /* schedule recovery from WQ/RQ error */
560 schedule_work(&enic->reset);
561
562 return IRQ_HANDLED;
563 }
564
565 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
566 {
567 struct enic *enic = data;
568
569 vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_NOTIFY]);
570 enic_notify_check(enic);
571
572 return IRQ_HANDLED;
573 }
574
575 static inline void enic_queue_wq_skb_cont(struct enic *enic,
576 struct vnic_wq *wq, struct sk_buff *skb,
577 unsigned int len_left)
578 {
579 skb_frag_t *frag;
580
581 /* Queue additional data fragments */
582 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
583 len_left -= frag->size;
584 enic_queue_wq_desc_cont(wq, skb,
585 pci_map_page(enic->pdev, frag->page,
586 frag->page_offset, frag->size,
587 PCI_DMA_TODEVICE),
588 frag->size,
589 (len_left == 0)); /* EOP? */
590 }
591 }
592
593 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
594 struct vnic_wq *wq, struct sk_buff *skb,
595 int vlan_tag_insert, unsigned int vlan_tag)
596 {
597 unsigned int head_len = skb_headlen(skb);
598 unsigned int len_left = skb->len - head_len;
599 int eop = (len_left == 0);
600
601 /* Queue the main skb fragment. The fragments are no larger
602 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
603 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
604 * per fragment is queued.
605 */
606 enic_queue_wq_desc(wq, skb,
607 pci_map_single(enic->pdev, skb->data,
608 head_len, PCI_DMA_TODEVICE),
609 head_len,
610 vlan_tag_insert, vlan_tag,
611 eop);
612
613 if (!eop)
614 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
615 }
616
617 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
618 struct vnic_wq *wq, struct sk_buff *skb,
619 int vlan_tag_insert, unsigned int vlan_tag)
620 {
621 unsigned int head_len = skb_headlen(skb);
622 unsigned int len_left = skb->len - head_len;
623 unsigned int hdr_len = skb_transport_offset(skb);
624 unsigned int csum_offset = hdr_len + skb->csum_offset;
625 int eop = (len_left == 0);
626
627 /* Queue the main skb fragment. The fragments are no larger
628 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
629 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
630 * per fragment is queued.
631 */
632 enic_queue_wq_desc_csum_l4(wq, skb,
633 pci_map_single(enic->pdev, skb->data,
634 head_len, PCI_DMA_TODEVICE),
635 head_len,
636 csum_offset,
637 hdr_len,
638 vlan_tag_insert, vlan_tag,
639 eop);
640
641 if (!eop)
642 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
643 }
644
645 static inline void enic_queue_wq_skb_tso(struct enic *enic,
646 struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
647 int vlan_tag_insert, unsigned int vlan_tag)
648 {
649 unsigned int frag_len_left = skb_headlen(skb);
650 unsigned int len_left = skb->len - frag_len_left;
651 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
652 int eop = (len_left == 0);
653 unsigned int len;
654 dma_addr_t dma_addr;
655 unsigned int offset = 0;
656 skb_frag_t *frag;
657
658 /* Preload TCP csum field with IP pseudo hdr calculated
659 * with IP length set to zero. HW will later add in length
660 * to each TCP segment resulting from the TSO.
661 */
662
663 if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
664 ip_hdr(skb)->check = 0;
665 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
666 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
667 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
668 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
669 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
670 }
671
672 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
673 * for the main skb fragment
674 */
675 while (frag_len_left) {
676 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
677 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
678 len, PCI_DMA_TODEVICE);
679 enic_queue_wq_desc_tso(wq, skb,
680 dma_addr,
681 len,
682 mss, hdr_len,
683 vlan_tag_insert, vlan_tag,
684 eop && (len == frag_len_left));
685 frag_len_left -= len;
686 offset += len;
687 }
688
689 if (eop)
690 return;
691
692 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
693 * for additional data fragments
694 */
695 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
696 len_left -= frag->size;
697 frag_len_left = frag->size;
698 offset = frag->page_offset;
699
700 while (frag_len_left) {
701 len = min(frag_len_left,
702 (unsigned int)WQ_ENET_MAX_DESC_LEN);
703 dma_addr = pci_map_page(enic->pdev, frag->page,
704 offset, len,
705 PCI_DMA_TODEVICE);
706 enic_queue_wq_desc_cont(wq, skb,
707 dma_addr,
708 len,
709 (len_left == 0) &&
710 (len == frag_len_left)); /* EOP? */
711 frag_len_left -= len;
712 offset += len;
713 }
714 }
715 }
716
717 static inline void enic_queue_wq_skb(struct enic *enic,
718 struct vnic_wq *wq, struct sk_buff *skb)
719 {
720 unsigned int mss = skb_shinfo(skb)->gso_size;
721 unsigned int vlan_tag = 0;
722 int vlan_tag_insert = 0;
723
724 if (enic->vlan_group && vlan_tx_tag_present(skb)) {
725 /* VLAN tag from trunking driver */
726 vlan_tag_insert = 1;
727 vlan_tag = vlan_tx_tag_get(skb);
728 }
729
730 if (mss)
731 enic_queue_wq_skb_tso(enic, wq, skb, mss,
732 vlan_tag_insert, vlan_tag);
733 else if (skb->ip_summed == CHECKSUM_PARTIAL)
734 enic_queue_wq_skb_csum_l4(enic, wq, skb,
735 vlan_tag_insert, vlan_tag);
736 else
737 enic_queue_wq_skb_vlan(enic, wq, skb,
738 vlan_tag_insert, vlan_tag);
739 }
740
741 /* netif_tx_lock held, process context with BHs disabled, or BH */
742 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
743 struct net_device *netdev)
744 {
745 struct enic *enic = netdev_priv(netdev);
746 struct vnic_wq *wq = &enic->wq[0];
747 unsigned long flags;
748
749 if (skb->len <= 0) {
750 dev_kfree_skb(skb);
751 return NETDEV_TX_OK;
752 }
753
754 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
755 * which is very likely. In the off chance it's going to take
756 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
757 */
758
759 if (skb_shinfo(skb)->gso_size == 0 &&
760 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
761 skb_linearize(skb)) {
762 dev_kfree_skb(skb);
763 return NETDEV_TX_OK;
764 }
765
766 spin_lock_irqsave(&enic->wq_lock[0], flags);
767
768 if (vnic_wq_desc_avail(wq) <
769 skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
770 netif_stop_queue(netdev);
771 /* This is a hard error, log it */
772 printk(KERN_ERR PFX "%s: BUG! Tx ring full when "
773 "queue awake!\n", netdev->name);
774 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
775 return NETDEV_TX_BUSY;
776 }
777
778 enic_queue_wq_skb(enic, wq, skb);
779
780 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
781 netif_stop_queue(netdev);
782
783 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
784
785 return NETDEV_TX_OK;
786 }
787
788 /* dev_base_lock rwlock held, nominally process context */
789 static struct net_device_stats *enic_get_stats(struct net_device *netdev)
790 {
791 struct enic *enic = netdev_priv(netdev);
792 struct net_device_stats *net_stats = &netdev->stats;
793 struct vnic_stats *stats;
794
795 spin_lock(&enic->devcmd_lock);
796 vnic_dev_stats_dump(enic->vdev, &stats);
797 spin_unlock(&enic->devcmd_lock);
798
799 net_stats->tx_packets = stats->tx.tx_frames_ok;
800 net_stats->tx_bytes = stats->tx.tx_bytes_ok;
801 net_stats->tx_errors = stats->tx.tx_errors;
802 net_stats->tx_dropped = stats->tx.tx_drops;
803
804 net_stats->rx_packets = stats->rx.rx_frames_ok;
805 net_stats->rx_bytes = stats->rx.rx_bytes_ok;
806 net_stats->rx_errors = stats->rx.rx_errors;
807 net_stats->multicast = stats->rx.rx_multicast_frames_ok;
808 net_stats->rx_over_errors = enic->rq_truncated_pkts;
809 net_stats->rx_crc_errors = enic->rq_bad_fcs;
810 net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
811
812 return net_stats;
813 }
814
815 static void enic_reset_mcaddrs(struct enic *enic)
816 {
817 enic->mc_count = 0;
818 }
819
820 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
821 {
822 struct enic *enic = netdev_priv(netdev);
823
824 if (enic_is_dynamic(enic)) {
825 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
826 return -EADDRNOTAVAIL;
827 } else {
828 if (!is_valid_ether_addr(addr))
829 return -EADDRNOTAVAIL;
830 }
831
832 memcpy(netdev->dev_addr, addr, netdev->addr_len);
833
834 return 0;
835 }
836
837 static int enic_dev_add_station_addr(struct enic *enic)
838 {
839 int err = 0;
840
841 if (is_valid_ether_addr(enic->netdev->dev_addr)) {
842 spin_lock(&enic->devcmd_lock);
843 err = vnic_dev_add_addr(enic->vdev, enic->netdev->dev_addr);
844 spin_unlock(&enic->devcmd_lock);
845 }
846
847 return err;
848 }
849
850 static int enic_dev_del_station_addr(struct enic *enic)
851 {
852 int err = 0;
853
854 if (is_valid_ether_addr(enic->netdev->dev_addr)) {
855 spin_lock(&enic->devcmd_lock);
856 err = vnic_dev_del_addr(enic->vdev, enic->netdev->dev_addr);
857 spin_unlock(&enic->devcmd_lock);
858 }
859
860 return err;
861 }
862
863 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
864 {
865 struct enic *enic = netdev_priv(netdev);
866 struct sockaddr *saddr = p;
867 char *addr = saddr->sa_data;
868 int err;
869
870 if (netif_running(enic->netdev)) {
871 err = enic_dev_del_station_addr(enic);
872 if (err)
873 return err;
874 }
875
876 err = enic_set_mac_addr(netdev, addr);
877 if (err)
878 return err;
879
880 if (netif_running(enic->netdev)) {
881 err = enic_dev_add_station_addr(enic);
882 if (err)
883 return err;
884 }
885
886 return err;
887 }
888
889 static int enic_set_mac_address(struct net_device *netdev, void *p)
890 {
891 return -EOPNOTSUPP;
892 }
893
894 /* netif_tx_lock held, BHs disabled */
895 static void enic_set_multicast_list(struct net_device *netdev)
896 {
897 struct enic *enic = netdev_priv(netdev);
898 struct netdev_hw_addr *ha;
899 int directed = 1;
900 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
901 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
902 int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0;
903 unsigned int mc_count = netdev_mc_count(netdev);
904 int allmulti = (netdev->flags & IFF_ALLMULTI) ||
905 mc_count > ENIC_MULTICAST_PERFECT_FILTERS;
906 unsigned int flags = netdev->flags | (allmulti ? IFF_ALLMULTI : 0);
907 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
908 unsigned int i, j;
909
910 if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS)
911 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
912
913 spin_lock(&enic->devcmd_lock);
914
915 if (enic->flags != flags) {
916 enic->flags = flags;
917 vnic_dev_packet_filter(enic->vdev, directed,
918 multicast, broadcast, promisc, allmulti);
919 }
920
921 /* Is there an easier way? Trying to minimize to
922 * calls to add/del multicast addrs. We keep the
923 * addrs from the last call in enic->mc_addr and
924 * look for changes to add/del.
925 */
926
927 i = 0;
928 netdev_for_each_mc_addr(ha, netdev) {
929 if (i == mc_count)
930 break;
931 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
932 }
933
934 for (i = 0; i < enic->mc_count; i++) {
935 for (j = 0; j < mc_count; j++)
936 if (compare_ether_addr(enic->mc_addr[i],
937 mc_addr[j]) == 0)
938 break;
939 if (j == mc_count)
940 enic_del_multicast_addr(enic, enic->mc_addr[i]);
941 }
942
943 for (i = 0; i < mc_count; i++) {
944 for (j = 0; j < enic->mc_count; j++)
945 if (compare_ether_addr(mc_addr[i],
946 enic->mc_addr[j]) == 0)
947 break;
948 if (j == enic->mc_count)
949 enic_add_multicast_addr(enic, mc_addr[i]);
950 }
951
952 /* Save the list to compare against next time
953 */
954
955 for (i = 0; i < mc_count; i++)
956 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
957
958 enic->mc_count = mc_count;
959
960 spin_unlock(&enic->devcmd_lock);
961 }
962
963 /* rtnl lock is held */
964 static void enic_vlan_rx_register(struct net_device *netdev,
965 struct vlan_group *vlan_group)
966 {
967 struct enic *enic = netdev_priv(netdev);
968 enic->vlan_group = vlan_group;
969 }
970
971 /* rtnl lock is held */
972 static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
973 {
974 struct enic *enic = netdev_priv(netdev);
975
976 spin_lock(&enic->devcmd_lock);
977 enic_add_vlan(enic, vid);
978 spin_unlock(&enic->devcmd_lock);
979 }
980
981 /* rtnl lock is held */
982 static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
983 {
984 struct enic *enic = netdev_priv(netdev);
985
986 spin_lock(&enic->devcmd_lock);
987 enic_del_vlan(enic, vid);
988 spin_unlock(&enic->devcmd_lock);
989 }
990
991 /* netif_tx_lock held, BHs disabled */
992 static void enic_tx_timeout(struct net_device *netdev)
993 {
994 struct enic *enic = netdev_priv(netdev);
995 schedule_work(&enic->reset);
996 }
997
998 static int enic_vnic_dev_deinit(struct enic *enic)
999 {
1000 int err;
1001
1002 spin_lock(&enic->devcmd_lock);
1003 err = vnic_dev_deinit(enic->vdev);
1004 spin_unlock(&enic->devcmd_lock);
1005
1006 return err;
1007 }
1008
1009 static int enic_dev_init_prov(struct enic *enic, struct vic_provinfo *vp)
1010 {
1011 int err;
1012
1013 spin_lock(&enic->devcmd_lock);
1014 err = vnic_dev_init_prov(enic->vdev,
1015 (u8 *)vp, vic_provinfo_size(vp));
1016 spin_unlock(&enic->devcmd_lock);
1017
1018 return err;
1019 }
1020
1021 static int enic_dev_init_done(struct enic *enic, int *done, int *error)
1022 {
1023 int err;
1024
1025 spin_lock(&enic->devcmd_lock);
1026 err = vnic_dev_init_done(enic->vdev, done, error);
1027 spin_unlock(&enic->devcmd_lock);
1028
1029 return err;
1030 }
1031
1032 static int enic_set_port_profile(struct enic *enic, u8 *mac)
1033 {
1034 struct vic_provinfo *vp;
1035 u8 oui[3] = VIC_PROVINFO_CISCO_OUI;
1036 u8 *uuid;
1037 char uuid_str[38];
1038 static char *uuid_fmt = "%02X%02X%02X%02X-%02X%02X-%02X%02X-"
1039 "%02X%02X-%02X%02X%02X%02X%0X%02X";
1040 int err;
1041
1042 err = enic_vnic_dev_deinit(enic);
1043 if (err)
1044 return err;
1045
1046 switch (enic->pp.request) {
1047
1048 case PORT_REQUEST_ASSOCIATE:
1049
1050 if (!(enic->pp.set & ENIC_SET_NAME) || !strlen(enic->pp.name))
1051 return -EINVAL;
1052
1053 if (!is_valid_ether_addr(mac))
1054 return -EADDRNOTAVAIL;
1055
1056 vp = vic_provinfo_alloc(GFP_KERNEL, oui,
1057 VIC_PROVINFO_LINUX_TYPE);
1058 if (!vp)
1059 return -ENOMEM;
1060
1061 vic_provinfo_add_tlv(vp,
1062 VIC_LINUX_PROV_TLV_PORT_PROFILE_NAME_STR,
1063 strlen(enic->pp.name) + 1, enic->pp.name);
1064
1065 vic_provinfo_add_tlv(vp,
1066 VIC_LINUX_PROV_TLV_CLIENT_MAC_ADDR,
1067 ETH_ALEN, mac);
1068
1069 if (enic->pp.set & ENIC_SET_INSTANCE) {
1070 uuid = enic->pp.instance_uuid;
1071 sprintf(uuid_str, uuid_fmt,
1072 uuid[0], uuid[1], uuid[2], uuid[3],
1073 uuid[4], uuid[5], uuid[6], uuid[7],
1074 uuid[8], uuid[9], uuid[10], uuid[11],
1075 uuid[12], uuid[13], uuid[14], uuid[15]);
1076 vic_provinfo_add_tlv(vp,
1077 VIC_LINUX_PROV_TLV_CLIENT_UUID_STR,
1078 sizeof(uuid_str), uuid_str);
1079 }
1080
1081 if (enic->pp.set & ENIC_SET_HOST) {
1082 uuid = enic->pp.host_uuid;
1083 sprintf(uuid_str, uuid_fmt,
1084 uuid[0], uuid[1], uuid[2], uuid[3],
1085 uuid[4], uuid[5], uuid[6], uuid[7],
1086 uuid[8], uuid[9], uuid[10], uuid[11],
1087 uuid[12], uuid[13], uuid[14], uuid[15]);
1088 vic_provinfo_add_tlv(vp,
1089 VIC_LINUX_PROV_TLV_HOST_UUID_STR,
1090 sizeof(uuid_str), uuid_str);
1091 }
1092
1093 err = enic_dev_init_prov(enic, vp);
1094 vic_provinfo_free(vp);
1095 if (err)
1096 return err;
1097 break;
1098
1099 case PORT_REQUEST_DISASSOCIATE:
1100 break;
1101
1102 default:
1103 return -EINVAL;
1104 }
1105
1106 enic->pp.set |= ENIC_SET_APPLIED;
1107 return 0;
1108 }
1109
1110 static int enic_set_vf_port(struct net_device *netdev, int vf,
1111 struct nlattr *port[])
1112 {
1113 struct enic *enic = netdev_priv(netdev);
1114
1115 memset(&enic->pp, 0, sizeof(enic->pp));
1116
1117 if (port[IFLA_PORT_REQUEST]) {
1118 enic->pp.set |= ENIC_SET_REQUEST;
1119 enic->pp.request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1120 }
1121
1122 if (port[IFLA_PORT_PROFILE]) {
1123 enic->pp.set |= ENIC_SET_NAME;
1124 memcpy(enic->pp.name, nla_data(port[IFLA_PORT_PROFILE]),
1125 PORT_PROFILE_MAX);
1126 }
1127
1128 if (port[IFLA_PORT_INSTANCE_UUID]) {
1129 enic->pp.set |= ENIC_SET_INSTANCE;
1130 memcpy(enic->pp.instance_uuid,
1131 nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1132 }
1133
1134 if (port[IFLA_PORT_HOST_UUID]) {
1135 enic->pp.set |= ENIC_SET_HOST;
1136 memcpy(enic->pp.host_uuid,
1137 nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1138 }
1139
1140 /* don't support VFs, yet */
1141 if (vf != PORT_SELF_VF)
1142 return -EOPNOTSUPP;
1143
1144 if (!(enic->pp.set & ENIC_SET_REQUEST))
1145 return -EOPNOTSUPP;
1146
1147 if (enic->pp.request == PORT_REQUEST_ASSOCIATE) {
1148
1149 /* If the interface mac addr hasn't been assigned,
1150 * assign a random mac addr before setting port-
1151 * profile.
1152 */
1153
1154 if (is_zero_ether_addr(netdev->dev_addr))
1155 random_ether_addr(netdev->dev_addr);
1156 }
1157
1158 return enic_set_port_profile(enic, netdev->dev_addr);
1159 }
1160
1161 static int enic_get_vf_port(struct net_device *netdev, int vf,
1162 struct sk_buff *skb)
1163 {
1164 struct enic *enic = netdev_priv(netdev);
1165 int err, error, done;
1166 u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1167
1168 if (!(enic->pp.set & ENIC_SET_APPLIED))
1169 return -ENODATA;
1170
1171 err = enic_dev_init_done(enic, &done, &error);
1172 if (err)
1173 error = err;
1174
1175 switch (error) {
1176 case ERR_SUCCESS:
1177 if (!done)
1178 response = PORT_PROFILE_RESPONSE_INPROGRESS;
1179 break;
1180 case ERR_EINVAL:
1181 response = PORT_PROFILE_RESPONSE_INVALID;
1182 break;
1183 case ERR_EBADSTATE:
1184 response = PORT_PROFILE_RESPONSE_BADSTATE;
1185 break;
1186 case ERR_ENOMEM:
1187 response = PORT_PROFILE_RESPONSE_INSUFFICIENT_RESOURCES;
1188 break;
1189 default:
1190 response = PORT_PROFILE_RESPONSE_ERROR;
1191 break;
1192 }
1193
1194 NLA_PUT_U16(skb, IFLA_PORT_REQUEST, enic->pp.request);
1195 NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
1196 if (enic->pp.set & ENIC_SET_NAME)
1197 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
1198 enic->pp.name);
1199 if (enic->pp.set & ENIC_SET_INSTANCE)
1200 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1201 enic->pp.instance_uuid);
1202 if (enic->pp.set & ENIC_SET_HOST)
1203 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
1204 enic->pp.host_uuid);
1205
1206 return 0;
1207
1208 nla_put_failure:
1209 return -EMSGSIZE;
1210 }
1211
1212 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1213 {
1214 struct enic *enic = vnic_dev_priv(rq->vdev);
1215
1216 if (!buf->os_buf)
1217 return;
1218
1219 pci_unmap_single(enic->pdev, buf->dma_addr,
1220 buf->len, PCI_DMA_FROMDEVICE);
1221 dev_kfree_skb_any(buf->os_buf);
1222 }
1223
1224 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1225 {
1226 struct enic *enic = vnic_dev_priv(rq->vdev);
1227 struct net_device *netdev = enic->netdev;
1228 struct sk_buff *skb;
1229 unsigned int len = netdev->mtu + ETH_HLEN;
1230 unsigned int os_buf_index = 0;
1231 dma_addr_t dma_addr;
1232
1233 skb = netdev_alloc_skb_ip_align(netdev, len);
1234 if (!skb)
1235 return -ENOMEM;
1236
1237 dma_addr = pci_map_single(enic->pdev, skb->data,
1238 len, PCI_DMA_FROMDEVICE);
1239
1240 enic_queue_rq_desc(rq, skb, os_buf_index,
1241 dma_addr, len);
1242
1243 return 0;
1244 }
1245
1246 static int enic_rq_alloc_buf_a1(struct vnic_rq *rq)
1247 {
1248 struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
1249
1250 if (vnic_rq_posting_soon(rq)) {
1251
1252 /* SW workaround for A0 HW erratum: if we're just about
1253 * to write posted_index, insert a dummy desc
1254 * of type resvd
1255 */
1256
1257 rq_enet_desc_enc(desc, 0, RQ_ENET_TYPE_RESV2, 0);
1258 vnic_rq_post(rq, 0, 0, 0, 0);
1259 } else {
1260 return enic_rq_alloc_buf(rq);
1261 }
1262
1263 return 0;
1264 }
1265
1266 static int enic_set_rq_alloc_buf(struct enic *enic)
1267 {
1268 enum vnic_dev_hw_version hw_ver;
1269 int err;
1270
1271 err = vnic_dev_hw_version(enic->vdev, &hw_ver);
1272 if (err)
1273 return err;
1274
1275 switch (hw_ver) {
1276 case VNIC_DEV_HW_VER_A1:
1277 enic->rq_alloc_buf = enic_rq_alloc_buf_a1;
1278 break;
1279 case VNIC_DEV_HW_VER_A2:
1280 case VNIC_DEV_HW_VER_UNKNOWN:
1281 enic->rq_alloc_buf = enic_rq_alloc_buf;
1282 break;
1283 default:
1284 return -ENODEV;
1285 }
1286
1287 return 0;
1288 }
1289
1290 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1291 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1292 int skipped, void *opaque)
1293 {
1294 struct enic *enic = vnic_dev_priv(rq->vdev);
1295 struct net_device *netdev = enic->netdev;
1296 struct sk_buff *skb;
1297
1298 u8 type, color, eop, sop, ingress_port, vlan_stripped;
1299 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1300 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1301 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1302 u8 packet_error;
1303 u16 q_number, completed_index, bytes_written, vlan, checksum;
1304 u32 rss_hash;
1305
1306 if (skipped)
1307 return;
1308
1309 skb = buf->os_buf;
1310 prefetch(skb->data - NET_IP_ALIGN);
1311 pci_unmap_single(enic->pdev, buf->dma_addr,
1312 buf->len, PCI_DMA_FROMDEVICE);
1313
1314 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1315 &type, &color, &q_number, &completed_index,
1316 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1317 &csum_not_calc, &rss_hash, &bytes_written,
1318 &packet_error, &vlan_stripped, &vlan, &checksum,
1319 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1320 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1321 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1322 &fcs_ok);
1323
1324 if (packet_error) {
1325
1326 if (!fcs_ok) {
1327 if (bytes_written > 0)
1328 enic->rq_bad_fcs++;
1329 else if (bytes_written == 0)
1330 enic->rq_truncated_pkts++;
1331 }
1332
1333 dev_kfree_skb_any(skb);
1334
1335 return;
1336 }
1337
1338 if (eop && bytes_written > 0) {
1339
1340 /* Good receive
1341 */
1342
1343 skb_put(skb, bytes_written);
1344 skb->protocol = eth_type_trans(skb, netdev);
1345
1346 if (enic->csum_rx_enabled && !csum_not_calc) {
1347 skb->csum = htons(checksum);
1348 skb->ip_summed = CHECKSUM_COMPLETE;
1349 }
1350
1351 skb->dev = netdev;
1352
1353 if (enic->vlan_group && vlan_stripped) {
1354
1355 if (netdev->features & NETIF_F_GRO)
1356 vlan_gro_receive(&enic->napi, enic->vlan_group,
1357 vlan, skb);
1358 else
1359 vlan_hwaccel_receive_skb(skb,
1360 enic->vlan_group, vlan);
1361
1362 } else {
1363
1364 if (netdev->features & NETIF_F_GRO)
1365 napi_gro_receive(&enic->napi, skb);
1366 else
1367 netif_receive_skb(skb);
1368
1369 }
1370
1371 } else {
1372
1373 /* Buffer overflow
1374 */
1375
1376 dev_kfree_skb_any(skb);
1377 }
1378 }
1379
1380 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1381 u8 type, u16 q_number, u16 completed_index, void *opaque)
1382 {
1383 struct enic *enic = vnic_dev_priv(vdev);
1384
1385 vnic_rq_service(&enic->rq[q_number], cq_desc,
1386 completed_index, VNIC_RQ_RETURN_DESC,
1387 enic_rq_indicate_buf, opaque);
1388
1389 return 0;
1390 }
1391
1392 static int enic_poll(struct napi_struct *napi, int budget)
1393 {
1394 struct enic *enic = container_of(napi, struct enic, napi);
1395 unsigned int rq_work_to_do = budget;
1396 unsigned int wq_work_to_do = -1; /* no limit */
1397 unsigned int work_done, rq_work_done, wq_work_done;
1398 int err;
1399
1400 /* Service RQ (first) and WQ
1401 */
1402
1403 rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1404 rq_work_to_do, enic_rq_service, NULL);
1405
1406 wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1407 wq_work_to_do, enic_wq_service, NULL);
1408
1409 /* Accumulate intr event credits for this polling
1410 * cycle. An intr event is the completion of a
1411 * a WQ or RQ packet.
1412 */
1413
1414 work_done = rq_work_done + wq_work_done;
1415
1416 if (work_done > 0)
1417 vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ],
1418 work_done,
1419 0 /* don't unmask intr */,
1420 0 /* don't reset intr timer */);
1421
1422 err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
1423
1424 /* Buffer allocation failed. Stay in polling
1425 * mode so we can try to fill the ring again.
1426 */
1427
1428 if (err)
1429 rq_work_done = rq_work_to_do;
1430
1431 if (rq_work_done < rq_work_to_do) {
1432
1433 /* Some work done, but not enough to stay in polling,
1434 * exit polling
1435 */
1436
1437 napi_complete(napi);
1438 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
1439 }
1440
1441 return rq_work_done;
1442 }
1443
1444 static int enic_poll_msix(struct napi_struct *napi, int budget)
1445 {
1446 struct enic *enic = container_of(napi, struct enic, napi);
1447 unsigned int work_to_do = budget;
1448 unsigned int work_done;
1449 int err;
1450
1451 /* Service RQ
1452 */
1453
1454 work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1455 work_to_do, enic_rq_service, NULL);
1456
1457 /* Return intr event credits for this polling
1458 * cycle. An intr event is the completion of a
1459 * RQ packet.
1460 */
1461
1462 if (work_done > 0)
1463 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ],
1464 work_done,
1465 0 /* don't unmask intr */,
1466 0 /* don't reset intr timer */);
1467
1468 err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
1469
1470 /* Buffer allocation failed. Stay in polling mode
1471 * so we can try to fill the ring again.
1472 */
1473
1474 if (err)
1475 work_done = work_to_do;
1476
1477 if (work_done < work_to_do) {
1478
1479 /* Some work done, but not enough to stay in polling,
1480 * exit polling
1481 */
1482
1483 napi_complete(napi);
1484 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
1485 }
1486
1487 return work_done;
1488 }
1489
1490 static void enic_notify_timer(unsigned long data)
1491 {
1492 struct enic *enic = (struct enic *)data;
1493
1494 enic_notify_check(enic);
1495
1496 mod_timer(&enic->notify_timer,
1497 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1498 }
1499
1500 static void enic_free_intr(struct enic *enic)
1501 {
1502 struct net_device *netdev = enic->netdev;
1503 unsigned int i;
1504
1505 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1506 case VNIC_DEV_INTR_MODE_INTX:
1507 free_irq(enic->pdev->irq, netdev);
1508 break;
1509 case VNIC_DEV_INTR_MODE_MSI:
1510 free_irq(enic->pdev->irq, enic);
1511 break;
1512 case VNIC_DEV_INTR_MODE_MSIX:
1513 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1514 if (enic->msix[i].requested)
1515 free_irq(enic->msix_entry[i].vector,
1516 enic->msix[i].devid);
1517 break;
1518 default:
1519 break;
1520 }
1521 }
1522
1523 static int enic_request_intr(struct enic *enic)
1524 {
1525 struct net_device *netdev = enic->netdev;
1526 unsigned int i;
1527 int err = 0;
1528
1529 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1530
1531 case VNIC_DEV_INTR_MODE_INTX:
1532
1533 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1534 IRQF_SHARED, netdev->name, netdev);
1535 break;
1536
1537 case VNIC_DEV_INTR_MODE_MSI:
1538
1539 err = request_irq(enic->pdev->irq, enic_isr_msi,
1540 0, netdev->name, enic);
1541 break;
1542
1543 case VNIC_DEV_INTR_MODE_MSIX:
1544
1545 sprintf(enic->msix[ENIC_MSIX_RQ].devname,
1546 "%.11s-rx-0", netdev->name);
1547 enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq;
1548 enic->msix[ENIC_MSIX_RQ].devid = enic;
1549
1550 sprintf(enic->msix[ENIC_MSIX_WQ].devname,
1551 "%.11s-tx-0", netdev->name);
1552 enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq;
1553 enic->msix[ENIC_MSIX_WQ].devid = enic;
1554
1555 sprintf(enic->msix[ENIC_MSIX_ERR].devname,
1556 "%.11s-err", netdev->name);
1557 enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err;
1558 enic->msix[ENIC_MSIX_ERR].devid = enic;
1559
1560 sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname,
1561 "%.11s-notify", netdev->name);
1562 enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify;
1563 enic->msix[ENIC_MSIX_NOTIFY].devid = enic;
1564
1565 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) {
1566 err = request_irq(enic->msix_entry[i].vector,
1567 enic->msix[i].isr, 0,
1568 enic->msix[i].devname,
1569 enic->msix[i].devid);
1570 if (err) {
1571 enic_free_intr(enic);
1572 break;
1573 }
1574 enic->msix[i].requested = 1;
1575 }
1576
1577 break;
1578
1579 default:
1580 break;
1581 }
1582
1583 return err;
1584 }
1585
1586 static void enic_synchronize_irqs(struct enic *enic)
1587 {
1588 unsigned int i;
1589
1590 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1591 case VNIC_DEV_INTR_MODE_INTX:
1592 case VNIC_DEV_INTR_MODE_MSI:
1593 synchronize_irq(enic->pdev->irq);
1594 break;
1595 case VNIC_DEV_INTR_MODE_MSIX:
1596 for (i = 0; i < enic->intr_count; i++)
1597 synchronize_irq(enic->msix_entry[i].vector);
1598 break;
1599 default:
1600 break;
1601 }
1602 }
1603
1604 static int enic_notify_set(struct enic *enic)
1605 {
1606 int err;
1607
1608 spin_lock(&enic->devcmd_lock);
1609 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1610 case VNIC_DEV_INTR_MODE_INTX:
1611 err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY);
1612 break;
1613 case VNIC_DEV_INTR_MODE_MSIX:
1614 err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY);
1615 break;
1616 default:
1617 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1618 break;
1619 }
1620 spin_unlock(&enic->devcmd_lock);
1621
1622 return err;
1623 }
1624
1625 static void enic_notify_timer_start(struct enic *enic)
1626 {
1627 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1628 case VNIC_DEV_INTR_MODE_MSI:
1629 mod_timer(&enic->notify_timer, jiffies);
1630 break;
1631 default:
1632 /* Using intr for notification for INTx/MSI-X */
1633 break;
1634 };
1635 }
1636
1637 /* rtnl lock is held, process context */
1638 static int enic_open(struct net_device *netdev)
1639 {
1640 struct enic *enic = netdev_priv(netdev);
1641 unsigned int i;
1642 int err;
1643
1644 err = enic_request_intr(enic);
1645 if (err) {
1646 printk(KERN_ERR PFX "%s: Unable to request irq.\n",
1647 netdev->name);
1648 return err;
1649 }
1650
1651 err = enic_notify_set(enic);
1652 if (err) {
1653 printk(KERN_ERR PFX
1654 "%s: Failed to alloc notify buffer, aborting.\n",
1655 netdev->name);
1656 goto err_out_free_intr;
1657 }
1658
1659 for (i = 0; i < enic->rq_count; i++) {
1660 vnic_rq_fill(&enic->rq[i], enic->rq_alloc_buf);
1661 /* Need at least one buffer on ring to get going */
1662 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1663 printk(KERN_ERR PFX
1664 "%s: Unable to alloc receive buffers.\n",
1665 netdev->name);
1666 err = -ENOMEM;
1667 goto err_out_notify_unset;
1668 }
1669 }
1670
1671 for (i = 0; i < enic->wq_count; i++)
1672 vnic_wq_enable(&enic->wq[i]);
1673 for (i = 0; i < enic->rq_count; i++)
1674 vnic_rq_enable(&enic->rq[i]);
1675
1676 enic_dev_add_station_addr(enic);
1677 enic_set_multicast_list(netdev);
1678
1679 netif_wake_queue(netdev);
1680 napi_enable(&enic->napi);
1681 spin_lock(&enic->devcmd_lock);
1682 vnic_dev_enable(enic->vdev);
1683 spin_unlock(&enic->devcmd_lock);
1684
1685 for (i = 0; i < enic->intr_count; i++)
1686 vnic_intr_unmask(&enic->intr[i]);
1687
1688 enic_notify_timer_start(enic);
1689
1690 return 0;
1691
1692 err_out_notify_unset:
1693 spin_lock(&enic->devcmd_lock);
1694 vnic_dev_notify_unset(enic->vdev);
1695 spin_unlock(&enic->devcmd_lock);
1696 err_out_free_intr:
1697 enic_free_intr(enic);
1698
1699 return err;
1700 }
1701
1702 /* rtnl lock is held, process context */
1703 static int enic_stop(struct net_device *netdev)
1704 {
1705 struct enic *enic = netdev_priv(netdev);
1706 unsigned int i;
1707 int err;
1708
1709 for (i = 0; i < enic->intr_count; i++)
1710 vnic_intr_mask(&enic->intr[i]);
1711
1712 enic_synchronize_irqs(enic);
1713
1714 del_timer_sync(&enic->notify_timer);
1715
1716 spin_lock(&enic->devcmd_lock);
1717 vnic_dev_disable(enic->vdev);
1718 spin_unlock(&enic->devcmd_lock);
1719 napi_disable(&enic->napi);
1720 netif_carrier_off(netdev);
1721 netif_tx_disable(netdev);
1722
1723 enic_dev_del_station_addr(enic);
1724
1725 for (i = 0; i < enic->wq_count; i++) {
1726 err = vnic_wq_disable(&enic->wq[i]);
1727 if (err)
1728 return err;
1729 }
1730 for (i = 0; i < enic->rq_count; i++) {
1731 err = vnic_rq_disable(&enic->rq[i]);
1732 if (err)
1733 return err;
1734 }
1735
1736 spin_lock(&enic->devcmd_lock);
1737 vnic_dev_notify_unset(enic->vdev);
1738 spin_unlock(&enic->devcmd_lock);
1739 enic_free_intr(enic);
1740
1741 for (i = 0; i < enic->wq_count; i++)
1742 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1743 for (i = 0; i < enic->rq_count; i++)
1744 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1745 for (i = 0; i < enic->cq_count; i++)
1746 vnic_cq_clean(&enic->cq[i]);
1747 for (i = 0; i < enic->intr_count; i++)
1748 vnic_intr_clean(&enic->intr[i]);
1749
1750 return 0;
1751 }
1752
1753 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1754 {
1755 struct enic *enic = netdev_priv(netdev);
1756 int running = netif_running(netdev);
1757
1758 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1759 return -EINVAL;
1760
1761 if (running)
1762 enic_stop(netdev);
1763
1764 netdev->mtu = new_mtu;
1765
1766 if (netdev->mtu > enic->port_mtu)
1767 printk(KERN_WARNING PFX
1768 "%s: interface MTU (%d) set higher "
1769 "than port MTU (%d)\n",
1770 netdev->name, netdev->mtu, enic->port_mtu);
1771
1772 if (running)
1773 enic_open(netdev);
1774
1775 return 0;
1776 }
1777
1778 #ifdef CONFIG_NET_POLL_CONTROLLER
1779 static void enic_poll_controller(struct net_device *netdev)
1780 {
1781 struct enic *enic = netdev_priv(netdev);
1782 struct vnic_dev *vdev = enic->vdev;
1783
1784 switch (vnic_dev_get_intr_mode(vdev)) {
1785 case VNIC_DEV_INTR_MODE_MSIX:
1786 enic_isr_msix_rq(enic->pdev->irq, enic);
1787 enic_isr_msix_wq(enic->pdev->irq, enic);
1788 break;
1789 case VNIC_DEV_INTR_MODE_MSI:
1790 enic_isr_msi(enic->pdev->irq, enic);
1791 break;
1792 case VNIC_DEV_INTR_MODE_INTX:
1793 enic_isr_legacy(enic->pdev->irq, netdev);
1794 break;
1795 default:
1796 break;
1797 }
1798 }
1799 #endif
1800
1801 static int enic_dev_wait(struct vnic_dev *vdev,
1802 int (*start)(struct vnic_dev *, int),
1803 int (*finished)(struct vnic_dev *, int *),
1804 int arg)
1805 {
1806 unsigned long time;
1807 int done;
1808 int err;
1809
1810 BUG_ON(in_interrupt());
1811
1812 err = start(vdev, arg);
1813 if (err)
1814 return err;
1815
1816 /* Wait for func to complete...2 seconds max
1817 */
1818
1819 time = jiffies + (HZ * 2);
1820 do {
1821
1822 err = finished(vdev, &done);
1823 if (err)
1824 return err;
1825
1826 if (done)
1827 return 0;
1828
1829 schedule_timeout_uninterruptible(HZ / 10);
1830
1831 } while (time_after(time, jiffies));
1832
1833 return -ETIMEDOUT;
1834 }
1835
1836 static int enic_dev_open(struct enic *enic)
1837 {
1838 int err;
1839
1840 err = enic_dev_wait(enic->vdev, vnic_dev_open,
1841 vnic_dev_open_done, 0);
1842 if (err)
1843 printk(KERN_ERR PFX
1844 "vNIC device open failed, err %d.\n", err);
1845
1846 return err;
1847 }
1848
1849 static int enic_dev_soft_reset(struct enic *enic)
1850 {
1851 int err;
1852
1853 err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset,
1854 vnic_dev_soft_reset_done, 0);
1855 if (err)
1856 printk(KERN_ERR PFX
1857 "vNIC soft reset failed, err %d.\n", err);
1858
1859 return err;
1860 }
1861
1862 static int enic_set_niccfg(struct enic *enic)
1863 {
1864 const u8 rss_default_cpu = 0;
1865 const u8 rss_hash_type = 0;
1866 const u8 rss_hash_bits = 0;
1867 const u8 rss_base_cpu = 0;
1868 const u8 rss_enable = 0;
1869 const u8 tso_ipid_split_en = 0;
1870 const u8 ig_vlan_strip_en = 1;
1871
1872 /* Enable VLAN tag stripping. RSS not enabled (yet).
1873 */
1874
1875 return enic_set_nic_cfg(enic,
1876 rss_default_cpu, rss_hash_type,
1877 rss_hash_bits, rss_base_cpu,
1878 rss_enable, tso_ipid_split_en,
1879 ig_vlan_strip_en);
1880 }
1881
1882 static void enic_reset(struct work_struct *work)
1883 {
1884 struct enic *enic = container_of(work, struct enic, reset);
1885
1886 if (!netif_running(enic->netdev))
1887 return;
1888
1889 rtnl_lock();
1890
1891 spin_lock(&enic->devcmd_lock);
1892 vnic_dev_hang_notify(enic->vdev);
1893 spin_unlock(&enic->devcmd_lock);
1894
1895 enic_stop(enic->netdev);
1896 enic_dev_soft_reset(enic);
1897 vnic_dev_init(enic->vdev, 0);
1898 enic_reset_mcaddrs(enic);
1899 enic_init_vnic_resources(enic);
1900 enic_set_niccfg(enic);
1901 enic_open(enic->netdev);
1902
1903 rtnl_unlock();
1904 }
1905
1906 static int enic_set_intr_mode(struct enic *enic)
1907 {
1908 unsigned int n = 1;
1909 unsigned int m = 1;
1910 unsigned int i;
1911
1912 /* Set interrupt mode (INTx, MSI, MSI-X) depending
1913 * system capabilities.
1914 *
1915 * Try MSI-X first
1916 *
1917 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1918 * (the second to last INTR is used for WQ/RQ errors)
1919 * (the last INTR is used for notifications)
1920 */
1921
1922 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
1923 for (i = 0; i < n + m + 2; i++)
1924 enic->msix_entry[i].entry = i;
1925
1926 if (enic->config.intr_mode < 1 &&
1927 enic->rq_count >= n &&
1928 enic->wq_count >= m &&
1929 enic->cq_count >= n + m &&
1930 enic->intr_count >= n + m + 2 &&
1931 !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
1932
1933 enic->rq_count = n;
1934 enic->wq_count = m;
1935 enic->cq_count = n + m;
1936 enic->intr_count = n + m + 2;
1937
1938 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX);
1939
1940 return 0;
1941 }
1942
1943 /* Next try MSI
1944 *
1945 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
1946 */
1947
1948 if (enic->config.intr_mode < 2 &&
1949 enic->rq_count >= 1 &&
1950 enic->wq_count >= 1 &&
1951 enic->cq_count >= 2 &&
1952 enic->intr_count >= 1 &&
1953 !pci_enable_msi(enic->pdev)) {
1954
1955 enic->rq_count = 1;
1956 enic->wq_count = 1;
1957 enic->cq_count = 2;
1958 enic->intr_count = 1;
1959
1960 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
1961
1962 return 0;
1963 }
1964
1965 /* Next try INTx
1966 *
1967 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
1968 * (the first INTR is used for WQ/RQ)
1969 * (the second INTR is used for WQ/RQ errors)
1970 * (the last INTR is used for notifications)
1971 */
1972
1973 if (enic->config.intr_mode < 3 &&
1974 enic->rq_count >= 1 &&
1975 enic->wq_count >= 1 &&
1976 enic->cq_count >= 2 &&
1977 enic->intr_count >= 3) {
1978
1979 enic->rq_count = 1;
1980 enic->wq_count = 1;
1981 enic->cq_count = 2;
1982 enic->intr_count = 3;
1983
1984 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
1985
1986 return 0;
1987 }
1988
1989 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1990
1991 return -EINVAL;
1992 }
1993
1994 static void enic_clear_intr_mode(struct enic *enic)
1995 {
1996 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1997 case VNIC_DEV_INTR_MODE_MSIX:
1998 pci_disable_msix(enic->pdev);
1999 break;
2000 case VNIC_DEV_INTR_MODE_MSI:
2001 pci_disable_msi(enic->pdev);
2002 break;
2003 default:
2004 break;
2005 }
2006
2007 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2008 }
2009
2010 static const struct net_device_ops enic_netdev_dynamic_ops = {
2011 .ndo_open = enic_open,
2012 .ndo_stop = enic_stop,
2013 .ndo_start_xmit = enic_hard_start_xmit,
2014 .ndo_get_stats = enic_get_stats,
2015 .ndo_validate_addr = eth_validate_addr,
2016 .ndo_set_multicast_list = enic_set_multicast_list,
2017 .ndo_set_mac_address = enic_set_mac_address_dynamic,
2018 .ndo_change_mtu = enic_change_mtu,
2019 .ndo_vlan_rx_register = enic_vlan_rx_register,
2020 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2021 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2022 .ndo_tx_timeout = enic_tx_timeout,
2023 .ndo_set_vf_port = enic_set_vf_port,
2024 .ndo_get_vf_port = enic_get_vf_port,
2025 #ifdef CONFIG_NET_POLL_CONTROLLER
2026 .ndo_poll_controller = enic_poll_controller,
2027 #endif
2028 };
2029
2030 static const struct net_device_ops enic_netdev_ops = {
2031 .ndo_open = enic_open,
2032 .ndo_stop = enic_stop,
2033 .ndo_start_xmit = enic_hard_start_xmit,
2034 .ndo_get_stats = enic_get_stats,
2035 .ndo_validate_addr = eth_validate_addr,
2036 .ndo_set_multicast_list = enic_set_multicast_list,
2037 .ndo_set_mac_address = enic_set_mac_address,
2038 .ndo_change_mtu = enic_change_mtu,
2039 .ndo_vlan_rx_register = enic_vlan_rx_register,
2040 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2041 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2042 .ndo_tx_timeout = enic_tx_timeout,
2043 #ifdef CONFIG_NET_POLL_CONTROLLER
2044 .ndo_poll_controller = enic_poll_controller,
2045 #endif
2046 };
2047
2048 void enic_dev_deinit(struct enic *enic)
2049 {
2050 netif_napi_del(&enic->napi);
2051 enic_free_vnic_resources(enic);
2052 enic_clear_intr_mode(enic);
2053 }
2054
2055 int enic_dev_init(struct enic *enic)
2056 {
2057 struct net_device *netdev = enic->netdev;
2058 int err;
2059
2060 /* Get vNIC configuration
2061 */
2062
2063 err = enic_get_vnic_config(enic);
2064 if (err) {
2065 printk(KERN_ERR PFX
2066 "Get vNIC configuration failed, aborting.\n");
2067 return err;
2068 }
2069
2070 /* Get available resource counts
2071 */
2072
2073 enic_get_res_counts(enic);
2074
2075 /* Set interrupt mode based on resource counts and system
2076 * capabilities
2077 */
2078
2079 err = enic_set_intr_mode(enic);
2080 if (err) {
2081 printk(KERN_ERR PFX
2082 "Failed to set intr mode based on resource "
2083 "counts and system capabilities, aborting.\n");
2084 return err;
2085 }
2086
2087 /* Allocate and configure vNIC resources
2088 */
2089
2090 err = enic_alloc_vnic_resources(enic);
2091 if (err) {
2092 printk(KERN_ERR PFX
2093 "Failed to alloc vNIC resources, aborting.\n");
2094 goto err_out_free_vnic_resources;
2095 }
2096
2097 enic_init_vnic_resources(enic);
2098
2099 err = enic_set_rq_alloc_buf(enic);
2100 if (err) {
2101 printk(KERN_ERR PFX
2102 "Failed to set RQ buffer allocator, aborting.\n");
2103 goto err_out_free_vnic_resources;
2104 }
2105
2106 err = enic_set_niccfg(enic);
2107 if (err) {
2108 printk(KERN_ERR PFX
2109 "Failed to config nic, aborting.\n");
2110 goto err_out_free_vnic_resources;
2111 }
2112
2113 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2114 default:
2115 netif_napi_add(netdev, &enic->napi, enic_poll, 64);
2116 break;
2117 case VNIC_DEV_INTR_MODE_MSIX:
2118 netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64);
2119 break;
2120 }
2121
2122 return 0;
2123
2124 err_out_free_vnic_resources:
2125 enic_clear_intr_mode(enic);
2126 enic_free_vnic_resources(enic);
2127
2128 return err;
2129 }
2130
2131 static void enic_iounmap(struct enic *enic)
2132 {
2133 unsigned int i;
2134
2135 for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2136 if (enic->bar[i].vaddr)
2137 iounmap(enic->bar[i].vaddr);
2138 }
2139
2140 static int __devinit enic_probe(struct pci_dev *pdev,
2141 const struct pci_device_id *ent)
2142 {
2143 struct net_device *netdev;
2144 struct enic *enic;
2145 int using_dac = 0;
2146 unsigned int i;
2147 int err;
2148
2149 /* Allocate net device structure and initialize. Private
2150 * instance data is initialized to zero.
2151 */
2152
2153 netdev = alloc_etherdev(sizeof(struct enic));
2154 if (!netdev) {
2155 printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
2156 return -ENOMEM;
2157 }
2158
2159 pci_set_drvdata(pdev, netdev);
2160
2161 SET_NETDEV_DEV(netdev, &pdev->dev);
2162
2163 enic = netdev_priv(netdev);
2164 enic->netdev = netdev;
2165 enic->pdev = pdev;
2166
2167 /* Setup PCI resources
2168 */
2169
2170 err = pci_enable_device(pdev);
2171 if (err) {
2172 printk(KERN_ERR PFX
2173 "Cannot enable PCI device, aborting.\n");
2174 goto err_out_free_netdev;
2175 }
2176
2177 err = pci_request_regions(pdev, DRV_NAME);
2178 if (err) {
2179 printk(KERN_ERR PFX
2180 "Cannot request PCI regions, aborting.\n");
2181 goto err_out_disable_device;
2182 }
2183
2184 pci_set_master(pdev);
2185
2186 /* Query PCI controller on system for DMA addressing
2187 * limitation for the device. Try 40-bit first, and
2188 * fail to 32-bit.
2189 */
2190
2191 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2192 if (err) {
2193 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2194 if (err) {
2195 printk(KERN_ERR PFX
2196 "No usable DMA configuration, aborting.\n");
2197 goto err_out_release_regions;
2198 }
2199 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2200 if (err) {
2201 printk(KERN_ERR PFX
2202 "Unable to obtain 32-bit DMA "
2203 "for consistent allocations, aborting.\n");
2204 goto err_out_release_regions;
2205 }
2206 } else {
2207 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2208 if (err) {
2209 printk(KERN_ERR PFX
2210 "Unable to obtain 40-bit DMA "
2211 "for consistent allocations, aborting.\n");
2212 goto err_out_release_regions;
2213 }
2214 using_dac = 1;
2215 }
2216
2217 /* Map vNIC resources from BAR0-5
2218 */
2219
2220 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2221 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2222 continue;
2223 enic->bar[i].len = pci_resource_len(pdev, i);
2224 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2225 if (!enic->bar[i].vaddr) {
2226 printk(KERN_ERR PFX
2227 "Cannot memory-map BAR %d, aborting.\n", i);
2228 err = -ENODEV;
2229 goto err_out_iounmap;
2230 }
2231 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2232 }
2233
2234 /* Register vNIC device
2235 */
2236
2237 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2238 ARRAY_SIZE(enic->bar));
2239 if (!enic->vdev) {
2240 printk(KERN_ERR PFX
2241 "vNIC registration failed, aborting.\n");
2242 err = -ENODEV;
2243 goto err_out_iounmap;
2244 }
2245
2246 /* Issue device open to get device in known state
2247 */
2248
2249 err = enic_dev_open(enic);
2250 if (err) {
2251 printk(KERN_ERR PFX
2252 "vNIC dev open failed, aborting.\n");
2253 goto err_out_vnic_unregister;
2254 }
2255
2256 /* Issue device init to initialize the vnic-to-switch link.
2257 * We'll start with carrier off and wait for link UP
2258 * notification later to turn on carrier. We don't need
2259 * to wait here for the vnic-to-switch link initialization
2260 * to complete; link UP notification is the indication that
2261 * the process is complete.
2262 */
2263
2264 netif_carrier_off(netdev);
2265
2266 if (!enic_is_dynamic(enic)) {
2267 err = vnic_dev_init(enic->vdev, 0);
2268 if (err) {
2269 printk(KERN_ERR PFX
2270 "vNIC dev init failed, aborting.\n");
2271 goto err_out_dev_close;
2272 }
2273 }
2274
2275 err = enic_dev_init(enic);
2276 if (err) {
2277 printk(KERN_ERR PFX
2278 "Device initialization failed, aborting.\n");
2279 goto err_out_dev_close;
2280 }
2281
2282 /* Setup notification timer, HW reset task, and locks
2283 */
2284
2285 init_timer(&enic->notify_timer);
2286 enic->notify_timer.function = enic_notify_timer;
2287 enic->notify_timer.data = (unsigned long)enic;
2288
2289 INIT_WORK(&enic->reset, enic_reset);
2290
2291 for (i = 0; i < enic->wq_count; i++)
2292 spin_lock_init(&enic->wq_lock[i]);
2293
2294 spin_lock_init(&enic->devcmd_lock);
2295
2296 /* Register net device
2297 */
2298
2299 enic->port_mtu = enic->config.mtu;
2300 (void)enic_change_mtu(netdev, enic->port_mtu);
2301
2302 err = enic_set_mac_addr(netdev, enic->mac_addr);
2303 if (err) {
2304 printk(KERN_ERR PFX
2305 "Invalid MAC address, aborting.\n");
2306 goto err_out_dev_deinit;
2307 }
2308
2309 enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2310 enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2311
2312 if (enic_is_dynamic(enic))
2313 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2314 else
2315 netdev->netdev_ops = &enic_netdev_ops;
2316
2317 netdev->watchdog_timeo = 2 * HZ;
2318 netdev->ethtool_ops = &enic_ethtool_ops;
2319
2320 netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2321 if (ENIC_SETTING(enic, TXCSUM))
2322 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2323 if (ENIC_SETTING(enic, TSO))
2324 netdev->features |= NETIF_F_TSO |
2325 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2326 if (ENIC_SETTING(enic, LRO))
2327 netdev->features |= NETIF_F_GRO;
2328 if (using_dac)
2329 netdev->features |= NETIF_F_HIGHDMA;
2330
2331 enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
2332
2333 err = register_netdev(netdev);
2334 if (err) {
2335 printk(KERN_ERR PFX
2336 "Cannot register net device, aborting.\n");
2337 goto err_out_dev_deinit;
2338 }
2339
2340 return 0;
2341
2342 err_out_dev_deinit:
2343 enic_dev_deinit(enic);
2344 err_out_dev_close:
2345 vnic_dev_close(enic->vdev);
2346 err_out_vnic_unregister:
2347 vnic_dev_unregister(enic->vdev);
2348 err_out_iounmap:
2349 enic_iounmap(enic);
2350 err_out_release_regions:
2351 pci_release_regions(pdev);
2352 err_out_disable_device:
2353 pci_disable_device(pdev);
2354 err_out_free_netdev:
2355 pci_set_drvdata(pdev, NULL);
2356 free_netdev(netdev);
2357
2358 return err;
2359 }
2360
2361 static void __devexit enic_remove(struct pci_dev *pdev)
2362 {
2363 struct net_device *netdev = pci_get_drvdata(pdev);
2364
2365 if (netdev) {
2366 struct enic *enic = netdev_priv(netdev);
2367
2368 flush_scheduled_work();
2369 unregister_netdev(netdev);
2370 enic_dev_deinit(enic);
2371 vnic_dev_close(enic->vdev);
2372 vnic_dev_unregister(enic->vdev);
2373 enic_iounmap(enic);
2374 pci_release_regions(pdev);
2375 pci_disable_device(pdev);
2376 pci_set_drvdata(pdev, NULL);
2377 free_netdev(netdev);
2378 }
2379 }
2380
2381 static struct pci_driver enic_driver = {
2382 .name = DRV_NAME,
2383 .id_table = enic_id_table,
2384 .probe = enic_probe,
2385 .remove = __devexit_p(enic_remove),
2386 };
2387
2388 static int __init enic_init_module(void)
2389 {
2390 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2391
2392 return pci_register_driver(&enic_driver);
2393 }
2394
2395 static void __exit enic_cleanup_module(void)
2396 {
2397 pci_unregister_driver(&enic_driver);
2398 }
2399
2400 module_init(enic_init_module);
2401 module_exit(enic_cleanup_module);
Linux 2.6 libata-dev (mirror)