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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph...
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / enic / enic_main.c
bloba0af48c51fb37d1860061e6358ec4dfdc64005fc
1 /*
2 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 *
18 */
19
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22 #include <linux/string.h>
23 #include <linux/errno.h>
24 #include <linux/types.h>
25 #include <linux/init.h>
26 #include <linux/workqueue.h>
27 #include <linux/pci.h>
28 #include <linux/netdevice.h>
29 #include <linux/etherdevice.h>
30 #include <linux/if_ether.h>
31 #include <linux/if_vlan.h>
32 #include <linux/ethtool.h>
33 #include <linux/in.h>
34 #include <linux/ip.h>
35 #include <linux/ipv6.h>
36 #include <linux/tcp.h>
37 #include <linux/rtnetlink.h>
38 #include <net/ip6_checksum.h>
39
40 #include "cq_enet_desc.h"
41 #include "vnic_dev.h"
42 #include "vnic_intr.h"
43 #include "vnic_stats.h"
44 #include "vnic_vic.h"
45 #include "enic_res.h"
46 #include "enic.h"
47
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 inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
126 {
127 return rq;
128 }
129
130 static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
131 {
132 return enic->rq_count + wq;
133 }
134
135 static inline unsigned int enic_legacy_io_intr(void)
136 {
137 return 0;
138 }
139
140 static inline unsigned int enic_legacy_err_intr(void)
141 {
142 return 1;
143 }
144
145 static inline unsigned int enic_legacy_notify_intr(void)
146 {
147 return 2;
148 }
149
150 static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq)
151 {
152 return rq;
153 }
154
155 static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq)
156 {
157 return enic->rq_count + wq;
158 }
159
160 static inline unsigned int enic_msix_err_intr(struct enic *enic)
161 {
162 return enic->rq_count + enic->wq_count;
163 }
164
165 static inline unsigned int enic_msix_notify_intr(struct enic *enic)
166 {
167 return enic->rq_count + enic->wq_count + 1;
168 }
169
170 static int enic_get_settings(struct net_device *netdev,
171 struct ethtool_cmd *ecmd)
172 {
173 struct enic *enic = netdev_priv(netdev);
174
175 ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
176 ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
177 ecmd->port = PORT_FIBRE;
178 ecmd->transceiver = XCVR_EXTERNAL;
179
180 if (netif_carrier_ok(netdev)) {
181 ecmd->speed = vnic_dev_port_speed(enic->vdev);
182 ecmd->duplex = DUPLEX_FULL;
183 } else {
184 ecmd->speed = -1;
185 ecmd->duplex = -1;
186 }
187
188 ecmd->autoneg = AUTONEG_DISABLE;
189
190 return 0;
191 }
192
193 static int enic_dev_fw_info(struct enic *enic,
194 struct vnic_devcmd_fw_info **fw_info)
195 {
196 int err;
197
198 spin_lock(&enic->devcmd_lock);
199 err = vnic_dev_fw_info(enic->vdev, fw_info);
200 spin_unlock(&enic->devcmd_lock);
201
202 return err;
203 }
204
205 static void enic_get_drvinfo(struct net_device *netdev,
206 struct ethtool_drvinfo *drvinfo)
207 {
208 struct enic *enic = netdev_priv(netdev);
209 struct vnic_devcmd_fw_info *fw_info;
210
211 enic_dev_fw_info(enic, &fw_info);
212
213 strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
214 strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
215 strncpy(drvinfo->fw_version, fw_info->fw_version,
216 sizeof(drvinfo->fw_version));
217 strncpy(drvinfo->bus_info, pci_name(enic->pdev),
218 sizeof(drvinfo->bus_info));
219 }
220
221 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
222 {
223 unsigned int i;
224
225 switch (stringset) {
226 case ETH_SS_STATS:
227 for (i = 0; i < enic_n_tx_stats; i++) {
228 memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
229 data += ETH_GSTRING_LEN;
230 }
231 for (i = 0; i < enic_n_rx_stats; i++) {
232 memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
233 data += ETH_GSTRING_LEN;
234 }
235 break;
236 }
237 }
238
239 static int enic_get_sset_count(struct net_device *netdev, int sset)
240 {
241 switch (sset) {
242 case ETH_SS_STATS:
243 return enic_n_tx_stats + enic_n_rx_stats;
244 default:
245 return -EOPNOTSUPP;
246 }
247 }
248
249 static int enic_dev_stats_dump(struct enic *enic, struct vnic_stats **vstats)
250 {
251 int err;
252
253 spin_lock(&enic->devcmd_lock);
254 err = vnic_dev_stats_dump(enic->vdev, vstats);
255 spin_unlock(&enic->devcmd_lock);
256
257 return err;
258 }
259
260 static void enic_get_ethtool_stats(struct net_device *netdev,
261 struct ethtool_stats *stats, u64 *data)
262 {
263 struct enic *enic = netdev_priv(netdev);
264 struct vnic_stats *vstats;
265 unsigned int i;
266
267 enic_dev_stats_dump(enic, &vstats);
268
269 for (i = 0; i < enic_n_tx_stats; i++)
270 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
271 for (i = 0; i < enic_n_rx_stats; i++)
272 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
273 }
274
275 static u32 enic_get_rx_csum(struct net_device *netdev)
276 {
277 struct enic *enic = netdev_priv(netdev);
278 return enic->csum_rx_enabled;
279 }
280
281 static int enic_set_rx_csum(struct net_device *netdev, u32 data)
282 {
283 struct enic *enic = netdev_priv(netdev);
284
285 if (data && !ENIC_SETTING(enic, RXCSUM))
286 return -EINVAL;
287
288 enic->csum_rx_enabled = !!data;
289
290 return 0;
291 }
292
293 static int enic_set_tx_csum(struct net_device *netdev, u32 data)
294 {
295 struct enic *enic = netdev_priv(netdev);
296
297 if (data && !ENIC_SETTING(enic, TXCSUM))
298 return -EINVAL;
299
300 if (data)
301 netdev->features |= NETIF_F_HW_CSUM;
302 else
303 netdev->features &= ~NETIF_F_HW_CSUM;
304
305 return 0;
306 }
307
308 static int enic_set_tso(struct net_device *netdev, u32 data)
309 {
310 struct enic *enic = netdev_priv(netdev);
311
312 if (data && !ENIC_SETTING(enic, TSO))
313 return -EINVAL;
314
315 if (data)
316 netdev->features |=
317 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
318 else
319 netdev->features &=
320 ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN);
321
322 return 0;
323 }
324
325 static u32 enic_get_msglevel(struct net_device *netdev)
326 {
327 struct enic *enic = netdev_priv(netdev);
328 return enic->msg_enable;
329 }
330
331 static void enic_set_msglevel(struct net_device *netdev, u32 value)
332 {
333 struct enic *enic = netdev_priv(netdev);
334 enic->msg_enable = value;
335 }
336
337 static int enic_get_coalesce(struct net_device *netdev,
338 struct ethtool_coalesce *ecmd)
339 {
340 struct enic *enic = netdev_priv(netdev);
341
342 ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
343 ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
344
345 return 0;
346 }
347
348 static int enic_set_coalesce(struct net_device *netdev,
349 struct ethtool_coalesce *ecmd)
350 {
351 struct enic *enic = netdev_priv(netdev);
352 u32 tx_coalesce_usecs;
353 u32 rx_coalesce_usecs;
354 unsigned int i, intr;
355
356 tx_coalesce_usecs = min_t(u32,
357 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
358 ecmd->tx_coalesce_usecs);
359 rx_coalesce_usecs = min_t(u32,
360 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
361 ecmd->rx_coalesce_usecs);
362
363 switch (vnic_dev_get_intr_mode(enic->vdev)) {
364 case VNIC_DEV_INTR_MODE_INTX:
365 if (tx_coalesce_usecs != rx_coalesce_usecs)
366 return -EINVAL;
367
368 intr = enic_legacy_io_intr();
369 vnic_intr_coalescing_timer_set(&enic->intr[intr],
370 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
371 break;
372 case VNIC_DEV_INTR_MODE_MSI:
373 if (tx_coalesce_usecs != rx_coalesce_usecs)
374 return -EINVAL;
375
376 vnic_intr_coalescing_timer_set(&enic->intr[0],
377 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
378 break;
379 case VNIC_DEV_INTR_MODE_MSIX:
380 for (i = 0; i < enic->wq_count; i++) {
381 intr = enic_msix_wq_intr(enic, i);
382 vnic_intr_coalescing_timer_set(&enic->intr[intr],
383 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
384 }
385
386 for (i = 0; i < enic->rq_count; i++) {
387 intr = enic_msix_rq_intr(enic, i);
388 vnic_intr_coalescing_timer_set(&enic->intr[intr],
389 INTR_COALESCE_USEC_TO_HW(rx_coalesce_usecs));
390 }
391
392 break;
393 default:
394 break;
395 }
396
397 enic->tx_coalesce_usecs = tx_coalesce_usecs;
398 enic->rx_coalesce_usecs = rx_coalesce_usecs;
399
400 return 0;
401 }
402
403 static const struct ethtool_ops enic_ethtool_ops = {
404 .get_settings = enic_get_settings,
405 .get_drvinfo = enic_get_drvinfo,
406 .get_msglevel = enic_get_msglevel,
407 .set_msglevel = enic_set_msglevel,
408 .get_link = ethtool_op_get_link,
409 .get_strings = enic_get_strings,
410 .get_sset_count = enic_get_sset_count,
411 .get_ethtool_stats = enic_get_ethtool_stats,
412 .get_rx_csum = enic_get_rx_csum,
413 .set_rx_csum = enic_set_rx_csum,
414 .get_tx_csum = ethtool_op_get_tx_csum,
415 .set_tx_csum = enic_set_tx_csum,
416 .get_sg = ethtool_op_get_sg,
417 .set_sg = ethtool_op_set_sg,
418 .get_tso = ethtool_op_get_tso,
419 .set_tso = enic_set_tso,
420 .get_coalesce = enic_get_coalesce,
421 .set_coalesce = enic_set_coalesce,
422 .get_flags = ethtool_op_get_flags,
423 };
424
425 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
426 {
427 struct enic *enic = vnic_dev_priv(wq->vdev);
428
429 if (buf->sop)
430 pci_unmap_single(enic->pdev, buf->dma_addr,
431 buf->len, PCI_DMA_TODEVICE);
432 else
433 pci_unmap_page(enic->pdev, buf->dma_addr,
434 buf->len, PCI_DMA_TODEVICE);
435
436 if (buf->os_buf)
437 dev_kfree_skb_any(buf->os_buf);
438 }
439
440 static void enic_wq_free_buf(struct vnic_wq *wq,
441 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
442 {
443 enic_free_wq_buf(wq, buf);
444 }
445
446 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
447 u8 type, u16 q_number, u16 completed_index, void *opaque)
448 {
449 struct enic *enic = vnic_dev_priv(vdev);
450
451 spin_lock(&enic->wq_lock[q_number]);
452
453 vnic_wq_service(&enic->wq[q_number], cq_desc,
454 completed_index, enic_wq_free_buf,
455 opaque);
456
457 if (netif_queue_stopped(enic->netdev) &&
458 vnic_wq_desc_avail(&enic->wq[q_number]) >=
459 (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
460 netif_wake_queue(enic->netdev);
461
462 spin_unlock(&enic->wq_lock[q_number]);
463
464 return 0;
465 }
466
467 static void enic_log_q_error(struct enic *enic)
468 {
469 unsigned int i;
470 u32 error_status;
471
472 for (i = 0; i < enic->wq_count; i++) {
473 error_status = vnic_wq_error_status(&enic->wq[i]);
474 if (error_status)
475 netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
476 i, error_status);
477 }
478
479 for (i = 0; i < enic->rq_count; i++) {
480 error_status = vnic_rq_error_status(&enic->rq[i]);
481 if (error_status)
482 netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
483 i, error_status);
484 }
485 }
486
487 static void enic_msglvl_check(struct enic *enic)
488 {
489 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
490
491 if (msg_enable != enic->msg_enable) {
492 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
493 enic->msg_enable, msg_enable);
494 enic->msg_enable = msg_enable;
495 }
496 }
497
498 static void enic_mtu_check(struct enic *enic)
499 {
500 u32 mtu = vnic_dev_mtu(enic->vdev);
501 struct net_device *netdev = enic->netdev;
502
503 if (mtu && mtu != enic->port_mtu) {
504 enic->port_mtu = mtu;
505 if (mtu < netdev->mtu)
506 netdev_warn(netdev,
507 "interface MTU (%d) set higher "
508 "than switch port MTU (%d)\n",
509 netdev->mtu, mtu);
510 }
511 }
512
513 static void enic_link_check(struct enic *enic)
514 {
515 int link_status = vnic_dev_link_status(enic->vdev);
516 int carrier_ok = netif_carrier_ok(enic->netdev);
517
518 if (link_status && !carrier_ok) {
519 netdev_info(enic->netdev, "Link UP\n");
520 netif_carrier_on(enic->netdev);
521 } else if (!link_status && carrier_ok) {
522 netdev_info(enic->netdev, "Link DOWN\n");
523 netif_carrier_off(enic->netdev);
524 }
525 }
526
527 static void enic_notify_check(struct enic *enic)
528 {
529 enic_msglvl_check(enic);
530 enic_mtu_check(enic);
531 enic_link_check(enic);
532 }
533
534 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
535
536 static irqreturn_t enic_isr_legacy(int irq, void *data)
537 {
538 struct net_device *netdev = data;
539 struct enic *enic = netdev_priv(netdev);
540 unsigned int io_intr = enic_legacy_io_intr();
541 unsigned int err_intr = enic_legacy_err_intr();
542 unsigned int notify_intr = enic_legacy_notify_intr();
543 u32 pba;
544
545 vnic_intr_mask(&enic->intr[io_intr]);
546
547 pba = vnic_intr_legacy_pba(enic->legacy_pba);
548 if (!pba) {
549 vnic_intr_unmask(&enic->intr[io_intr]);
550 return IRQ_NONE; /* not our interrupt */
551 }
552
553 if (ENIC_TEST_INTR(pba, notify_intr)) {
554 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
555 enic_notify_check(enic);
556 }
557
558 if (ENIC_TEST_INTR(pba, err_intr)) {
559 vnic_intr_return_all_credits(&enic->intr[err_intr]);
560 enic_log_q_error(enic);
561 /* schedule recovery from WQ/RQ error */
562 schedule_work(&enic->reset);
563 return IRQ_HANDLED;
564 }
565
566 if (ENIC_TEST_INTR(pba, io_intr)) {
567 if (napi_schedule_prep(&enic->napi[0]))
568 __napi_schedule(&enic->napi[0]);
569 } else {
570 vnic_intr_unmask(&enic->intr[io_intr]);
571 }
572
573 return IRQ_HANDLED;
574 }
575
576 static irqreturn_t enic_isr_msi(int irq, void *data)
577 {
578 struct enic *enic = data;
579
580 /* With MSI, there is no sharing of interrupts, so this is
581 * our interrupt and there is no need to ack it. The device
582 * is not providing per-vector masking, so the OS will not
583 * write to PCI config space to mask/unmask the interrupt.
584 * We're using mask_on_assertion for MSI, so the device
585 * automatically masks the interrupt when the interrupt is
586 * generated. Later, when exiting polling, the interrupt
587 * will be unmasked (see enic_poll).
588 *
589 * Also, the device uses the same PCIe Traffic Class (TC)
590 * for Memory Write data and MSI, so there are no ordering
591 * issues; the MSI will always arrive at the Root Complex
592 * _after_ corresponding Memory Writes (i.e. descriptor
593 * writes).
594 */
595
596 napi_schedule(&enic->napi[0]);
597
598 return IRQ_HANDLED;
599 }
600
601 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
602 {
603 struct napi_struct *napi = data;
604
605 /* schedule NAPI polling for RQ cleanup */
606 napi_schedule(napi);
607
608 return IRQ_HANDLED;
609 }
610
611 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
612 {
613 struct enic *enic = data;
614 unsigned int cq = enic_cq_wq(enic, 0);
615 unsigned int intr = enic_msix_wq_intr(enic, 0);
616 unsigned int wq_work_to_do = -1; /* no limit */
617 unsigned int wq_work_done;
618
619 wq_work_done = vnic_cq_service(&enic->cq[cq],
620 wq_work_to_do, enic_wq_service, NULL);
621
622 vnic_intr_return_credits(&enic->intr[intr],
623 wq_work_done,
624 1 /* unmask intr */,
625 1 /* reset intr timer */);
626
627 return IRQ_HANDLED;
628 }
629
630 static irqreturn_t enic_isr_msix_err(int irq, void *data)
631 {
632 struct enic *enic = data;
633 unsigned int intr = enic_msix_err_intr(enic);
634
635 vnic_intr_return_all_credits(&enic->intr[intr]);
636
637 enic_log_q_error(enic);
638
639 /* schedule recovery from WQ/RQ error */
640 schedule_work(&enic->reset);
641
642 return IRQ_HANDLED;
643 }
644
645 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
646 {
647 struct enic *enic = data;
648 unsigned int intr = enic_msix_notify_intr(enic);
649
650 vnic_intr_return_all_credits(&enic->intr[intr]);
651 enic_notify_check(enic);
652
653 return IRQ_HANDLED;
654 }
655
656 static inline void enic_queue_wq_skb_cont(struct enic *enic,
657 struct vnic_wq *wq, struct sk_buff *skb,
658 unsigned int len_left, int loopback)
659 {
660 skb_frag_t *frag;
661
662 /* Queue additional data fragments */
663 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
664 len_left -= frag->size;
665 enic_queue_wq_desc_cont(wq, skb,
666 pci_map_page(enic->pdev, frag->page,
667 frag->page_offset, frag->size,
668 PCI_DMA_TODEVICE),
669 frag->size,
670 (len_left == 0), /* EOP? */
671 loopback);
672 }
673 }
674
675 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
676 struct vnic_wq *wq, struct sk_buff *skb,
677 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
678 {
679 unsigned int head_len = skb_headlen(skb);
680 unsigned int len_left = skb->len - head_len;
681 int eop = (len_left == 0);
682
683 /* Queue the main skb fragment. The fragments are no larger
684 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
685 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
686 * per fragment is queued.
687 */
688 enic_queue_wq_desc(wq, skb,
689 pci_map_single(enic->pdev, skb->data,
690 head_len, PCI_DMA_TODEVICE),
691 head_len,
692 vlan_tag_insert, vlan_tag,
693 eop, loopback);
694
695 if (!eop)
696 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
697 }
698
699 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
700 struct vnic_wq *wq, struct sk_buff *skb,
701 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
702 {
703 unsigned int head_len = skb_headlen(skb);
704 unsigned int len_left = skb->len - head_len;
705 unsigned int hdr_len = skb_checksum_start_offset(skb);
706 unsigned int csum_offset = hdr_len + skb->csum_offset;
707 int eop = (len_left == 0);
708
709 /* Queue the main skb fragment. The fragments are no larger
710 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
711 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
712 * per fragment is queued.
713 */
714 enic_queue_wq_desc_csum_l4(wq, skb,
715 pci_map_single(enic->pdev, skb->data,
716 head_len, PCI_DMA_TODEVICE),
717 head_len,
718 csum_offset,
719 hdr_len,
720 vlan_tag_insert, vlan_tag,
721 eop, loopback);
722
723 if (!eop)
724 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
725 }
726
727 static inline void enic_queue_wq_skb_tso(struct enic *enic,
728 struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
729 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
730 {
731 unsigned int frag_len_left = skb_headlen(skb);
732 unsigned int len_left = skb->len - frag_len_left;
733 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
734 int eop = (len_left == 0);
735 unsigned int len;
736 dma_addr_t dma_addr;
737 unsigned int offset = 0;
738 skb_frag_t *frag;
739
740 /* Preload TCP csum field with IP pseudo hdr calculated
741 * with IP length set to zero. HW will later add in length
742 * to each TCP segment resulting from the TSO.
743 */
744
745 if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
746 ip_hdr(skb)->check = 0;
747 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
748 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
749 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
750 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
751 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
752 }
753
754 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
755 * for the main skb fragment
756 */
757 while (frag_len_left) {
758 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
759 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
760 len, PCI_DMA_TODEVICE);
761 enic_queue_wq_desc_tso(wq, skb,
762 dma_addr,
763 len,
764 mss, hdr_len,
765 vlan_tag_insert, vlan_tag,
766 eop && (len == frag_len_left), loopback);
767 frag_len_left -= len;
768 offset += len;
769 }
770
771 if (eop)
772 return;
773
774 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
775 * for additional data fragments
776 */
777 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
778 len_left -= frag->size;
779 frag_len_left = frag->size;
780 offset = frag->page_offset;
781
782 while (frag_len_left) {
783 len = min(frag_len_left,
784 (unsigned int)WQ_ENET_MAX_DESC_LEN);
785 dma_addr = pci_map_page(enic->pdev, frag->page,
786 offset, len,
787 PCI_DMA_TODEVICE);
788 enic_queue_wq_desc_cont(wq, skb,
789 dma_addr,
790 len,
791 (len_left == 0) &&
792 (len == frag_len_left), /* EOP? */
793 loopback);
794 frag_len_left -= len;
795 offset += len;
796 }
797 }
798 }
799
800 static inline void enic_queue_wq_skb(struct enic *enic,
801 struct vnic_wq *wq, struct sk_buff *skb)
802 {
803 unsigned int mss = skb_shinfo(skb)->gso_size;
804 unsigned int vlan_tag = 0;
805 int vlan_tag_insert = 0;
806 int loopback = 0;
807
808 if (vlan_tx_tag_present(skb)) {
809 /* VLAN tag from trunking driver */
810 vlan_tag_insert = 1;
811 vlan_tag = vlan_tx_tag_get(skb);
812 } else if (enic->loop_enable) {
813 vlan_tag = enic->loop_tag;
814 loopback = 1;
815 }
816
817 if (mss)
818 enic_queue_wq_skb_tso(enic, wq, skb, mss,
819 vlan_tag_insert, vlan_tag, loopback);
820 else if (skb->ip_summed == CHECKSUM_PARTIAL)
821 enic_queue_wq_skb_csum_l4(enic, wq, skb,
822 vlan_tag_insert, vlan_tag, loopback);
823 else
824 enic_queue_wq_skb_vlan(enic, wq, skb,
825 vlan_tag_insert, vlan_tag, loopback);
826 }
827
828 /* netif_tx_lock held, process context with BHs disabled, or BH */
829 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
830 struct net_device *netdev)
831 {
832 struct enic *enic = netdev_priv(netdev);
833 struct vnic_wq *wq = &enic->wq[0];
834 unsigned long flags;
835
836 if (skb->len <= 0) {
837 dev_kfree_skb(skb);
838 return NETDEV_TX_OK;
839 }
840
841 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
842 * which is very likely. In the off chance it's going to take
843 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
844 */
845
846 if (skb_shinfo(skb)->gso_size == 0 &&
847 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
848 skb_linearize(skb)) {
849 dev_kfree_skb(skb);
850 return NETDEV_TX_OK;
851 }
852
853 spin_lock_irqsave(&enic->wq_lock[0], flags);
854
855 if (vnic_wq_desc_avail(wq) <
856 skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
857 netif_stop_queue(netdev);
858 /* This is a hard error, log it */
859 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
860 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
861 return NETDEV_TX_BUSY;
862 }
863
864 enic_queue_wq_skb(enic, wq, skb);
865
866 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
867 netif_stop_queue(netdev);
868
869 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
870
871 return NETDEV_TX_OK;
872 }
873
874 /* dev_base_lock rwlock held, nominally process context */
875 static struct net_device_stats *enic_get_stats(struct net_device *netdev)
876 {
877 struct enic *enic = netdev_priv(netdev);
878 struct net_device_stats *net_stats = &netdev->stats;
879 struct vnic_stats *stats;
880
881 enic_dev_stats_dump(enic, &stats);
882
883 net_stats->tx_packets = stats->tx.tx_frames_ok;
884 net_stats->tx_bytes = stats->tx.tx_bytes_ok;
885 net_stats->tx_errors = stats->tx.tx_errors;
886 net_stats->tx_dropped = stats->tx.tx_drops;
887
888 net_stats->rx_packets = stats->rx.rx_frames_ok;
889 net_stats->rx_bytes = stats->rx.rx_bytes_ok;
890 net_stats->rx_errors = stats->rx.rx_errors;
891 net_stats->multicast = stats->rx.rx_multicast_frames_ok;
892 net_stats->rx_over_errors = enic->rq_truncated_pkts;
893 net_stats->rx_crc_errors = enic->rq_bad_fcs;
894 net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
895
896 return net_stats;
897 }
898
899 static void enic_reset_multicast_list(struct enic *enic)
900 {
901 enic->mc_count = 0;
902 enic->flags = 0;
903 }
904
905 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
906 {
907 struct enic *enic = netdev_priv(netdev);
908
909 if (enic_is_dynamic(enic)) {
910 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
911 return -EADDRNOTAVAIL;
912 } else {
913 if (!is_valid_ether_addr(addr))
914 return -EADDRNOTAVAIL;
915 }
916
917 memcpy(netdev->dev_addr, addr, netdev->addr_len);
918
919 return 0;
920 }
921
922 static int enic_dev_add_station_addr(struct enic *enic)
923 {
924 int err = 0;
925
926 if (is_valid_ether_addr(enic->netdev->dev_addr)) {
927 spin_lock(&enic->devcmd_lock);
928 err = vnic_dev_add_addr(enic->vdev, enic->netdev->dev_addr);
929 spin_unlock(&enic->devcmd_lock);
930 }
931
932 return err;
933 }
934
935 static int enic_dev_del_station_addr(struct enic *enic)
936 {
937 int err = 0;
938
939 if (is_valid_ether_addr(enic->netdev->dev_addr)) {
940 spin_lock(&enic->devcmd_lock);
941 err = vnic_dev_del_addr(enic->vdev, enic->netdev->dev_addr);
942 spin_unlock(&enic->devcmd_lock);
943 }
944
945 return err;
946 }
947
948 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
949 {
950 struct enic *enic = netdev_priv(netdev);
951 struct sockaddr *saddr = p;
952 char *addr = saddr->sa_data;
953 int err;
954
955 if (netif_running(enic->netdev)) {
956 err = enic_dev_del_station_addr(enic);
957 if (err)
958 return err;
959 }
960
961 err = enic_set_mac_addr(netdev, addr);
962 if (err)
963 return err;
964
965 if (netif_running(enic->netdev)) {
966 err = enic_dev_add_station_addr(enic);
967 if (err)
968 return err;
969 }
970
971 return err;
972 }
973
974 static int enic_set_mac_address(struct net_device *netdev, void *p)
975 {
976 struct sockaddr *saddr = p;
977 char *addr = saddr->sa_data;
978 struct enic *enic = netdev_priv(netdev);
979 int err;
980
981 err = enic_dev_del_station_addr(enic);
982 if (err)
983 return err;
984
985 err = enic_set_mac_addr(netdev, addr);
986 if (err)
987 return err;
988
989 return enic_dev_add_station_addr(enic);
990 }
991
992 static int enic_dev_packet_filter(struct enic *enic, int directed,
993 int multicast, int broadcast, int promisc, int allmulti)
994 {
995 int err;
996
997 spin_lock(&enic->devcmd_lock);
998 err = vnic_dev_packet_filter(enic->vdev, directed,
999 multicast, broadcast, promisc, allmulti);
1000 spin_unlock(&enic->devcmd_lock);
1001
1002 return err;
1003 }
1004
1005 static int enic_dev_add_addr(struct enic *enic, u8 *addr)
1006 {
1007 int err;
1008
1009 spin_lock(&enic->devcmd_lock);
1010 err = vnic_dev_add_addr(enic->vdev, addr);
1011 spin_unlock(&enic->devcmd_lock);
1012
1013 return err;
1014 }
1015
1016 static int enic_dev_del_addr(struct enic *enic, u8 *addr)
1017 {
1018 int err;
1019
1020 spin_lock(&enic->devcmd_lock);
1021 err = vnic_dev_del_addr(enic->vdev, addr);
1022 spin_unlock(&enic->devcmd_lock);
1023
1024 return err;
1025 }
1026
1027 static void enic_add_multicast_addr_list(struct enic *enic)
1028 {
1029 struct net_device *netdev = enic->netdev;
1030 struct netdev_hw_addr *ha;
1031 unsigned int mc_count = netdev_mc_count(netdev);
1032 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
1033 unsigned int i, j;
1034
1035 if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
1036 netdev_warn(netdev, "Registering only %d out of %d "
1037 "multicast addresses\n",
1038 ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
1039 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
1040 }
1041
1042 /* Is there an easier way? Trying to minimize to
1043 * calls to add/del multicast addrs. We keep the
1044 * addrs from the last call in enic->mc_addr and
1045 * look for changes to add/del.
1046 */
1047
1048 i = 0;
1049 netdev_for_each_mc_addr(ha, netdev) {
1050 if (i == mc_count)
1051 break;
1052 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
1053 }
1054
1055 for (i = 0; i < enic->mc_count; i++) {
1056 for (j = 0; j < mc_count; j++)
1057 if (compare_ether_addr(enic->mc_addr[i],
1058 mc_addr[j]) == 0)
1059 break;
1060 if (j == mc_count)
1061 enic_dev_del_addr(enic, enic->mc_addr[i]);
1062 }
1063
1064 for (i = 0; i < mc_count; i++) {
1065 for (j = 0; j < enic->mc_count; j++)
1066 if (compare_ether_addr(mc_addr[i],
1067 enic->mc_addr[j]) == 0)
1068 break;
1069 if (j == enic->mc_count)
1070 enic_dev_add_addr(enic, mc_addr[i]);
1071 }
1072
1073 /* Save the list to compare against next time
1074 */
1075
1076 for (i = 0; i < mc_count; i++)
1077 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
1078
1079 enic->mc_count = mc_count;
1080 }
1081
1082 static void enic_add_unicast_addr_list(struct enic *enic)
1083 {
1084 struct net_device *netdev = enic->netdev;
1085 struct netdev_hw_addr *ha;
1086 unsigned int uc_count = netdev_uc_count(netdev);
1087 u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
1088 unsigned int i, j;
1089
1090 if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
1091 netdev_warn(netdev, "Registering only %d out of %d "
1092 "unicast addresses\n",
1093 ENIC_UNICAST_PERFECT_FILTERS, uc_count);
1094 uc_count = ENIC_UNICAST_PERFECT_FILTERS;
1095 }
1096
1097 /* Is there an easier way? Trying to minimize to
1098 * calls to add/del unicast addrs. We keep the
1099 * addrs from the last call in enic->uc_addr and
1100 * look for changes to add/del.
1101 */
1102
1103 i = 0;
1104 netdev_for_each_uc_addr(ha, netdev) {
1105 if (i == uc_count)
1106 break;
1107 memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
1108 }
1109
1110 for (i = 0; i < enic->uc_count; i++) {
1111 for (j = 0; j < uc_count; j++)
1112 if (compare_ether_addr(enic->uc_addr[i],
1113 uc_addr[j]) == 0)
1114 break;
1115 if (j == uc_count)
1116 enic_dev_del_addr(enic, enic->uc_addr[i]);
1117 }
1118
1119 for (i = 0; i < uc_count; i++) {
1120 for (j = 0; j < enic->uc_count; j++)
1121 if (compare_ether_addr(uc_addr[i],
1122 enic->uc_addr[j]) == 0)
1123 break;
1124 if (j == enic->uc_count)
1125 enic_dev_add_addr(enic, uc_addr[i]);
1126 }
1127
1128 /* Save the list to compare against next time
1129 */
1130
1131 for (i = 0; i < uc_count; i++)
1132 memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
1133
1134 enic->uc_count = uc_count;
1135 }
1136
1137 /* netif_tx_lock held, BHs disabled */
1138 static void enic_set_rx_mode(struct net_device *netdev)
1139 {
1140 struct enic *enic = netdev_priv(netdev);
1141 int directed = 1;
1142 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1143 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1144 int promisc = (netdev->flags & IFF_PROMISC) ||
1145 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
1146 int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1147 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
1148 unsigned int flags = netdev->flags |
1149 (allmulti ? IFF_ALLMULTI : 0) |
1150 (promisc ? IFF_PROMISC : 0);
1151
1152 if (enic->flags != flags) {
1153 enic->flags = flags;
1154 enic_dev_packet_filter(enic, directed,
1155 multicast, broadcast, promisc, allmulti);
1156 }
1157
1158 if (!promisc) {
1159 enic_add_unicast_addr_list(enic);
1160 if (!allmulti)
1161 enic_add_multicast_addr_list(enic);
1162 }
1163 }
1164
1165 /* rtnl lock is held */
1166 static void enic_vlan_rx_register(struct net_device *netdev,
1167 struct vlan_group *vlan_group)
1168 {
1169 struct enic *enic = netdev_priv(netdev);
1170 enic->vlan_group = vlan_group;
1171 }
1172
1173 /* rtnl lock is held */
1174 static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1175 {
1176 struct enic *enic = netdev_priv(netdev);
1177
1178 spin_lock(&enic->devcmd_lock);
1179 enic_add_vlan(enic, vid);
1180 spin_unlock(&enic->devcmd_lock);
1181 }
1182
1183 /* rtnl lock is held */
1184 static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1185 {
1186 struct enic *enic = netdev_priv(netdev);
1187
1188 spin_lock(&enic->devcmd_lock);
1189 enic_del_vlan(enic, vid);
1190 spin_unlock(&enic->devcmd_lock);
1191 }
1192
1193 /* netif_tx_lock held, BHs disabled */
1194 static void enic_tx_timeout(struct net_device *netdev)
1195 {
1196 struct enic *enic = netdev_priv(netdev);
1197 schedule_work(&enic->reset);
1198 }
1199
1200 static int enic_vnic_dev_deinit(struct enic *enic)
1201 {
1202 int err;
1203
1204 spin_lock(&enic->devcmd_lock);
1205 err = vnic_dev_deinit(enic->vdev);
1206 spin_unlock(&enic->devcmd_lock);
1207
1208 return err;
1209 }
1210
1211 static int enic_dev_init_prov(struct enic *enic, struct vic_provinfo *vp)
1212 {
1213 int err;
1214
1215 spin_lock(&enic->devcmd_lock);
1216 err = vnic_dev_init_prov(enic->vdev,
1217 (u8 *)vp, vic_provinfo_size(vp));
1218 spin_unlock(&enic->devcmd_lock);
1219
1220 return err;
1221 }
1222
1223 static int enic_dev_init_done(struct enic *enic, int *done, int *error)
1224 {
1225 int err;
1226
1227 spin_lock(&enic->devcmd_lock);
1228 err = vnic_dev_init_done(enic->vdev, done, error);
1229 spin_unlock(&enic->devcmd_lock);
1230
1231 return err;
1232 }
1233
1234 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
1235 {
1236 struct enic *enic = netdev_priv(netdev);
1237
1238 if (vf != PORT_SELF_VF)
1239 return -EOPNOTSUPP;
1240
1241 /* Ignore the vf argument for now. We can assume the request
1242 * is coming on a vf.
1243 */
1244 if (is_valid_ether_addr(mac)) {
1245 memcpy(enic->pp.vf_mac, mac, ETH_ALEN);
1246 return 0;
1247 } else
1248 return -EINVAL;
1249 }
1250
1251 static int enic_set_port_profile(struct enic *enic, u8 *mac)
1252 {
1253 struct vic_provinfo *vp;
1254 u8 oui[3] = VIC_PROVINFO_CISCO_OUI;
1255 u16 os_type = VIC_GENERIC_PROV_OS_TYPE_LINUX;
1256 char uuid_str[38];
1257 char client_mac_str[18];
1258 u8 *client_mac;
1259 int err;
1260
1261 err = enic_vnic_dev_deinit(enic);
1262 if (err)
1263 return err;
1264
1265 switch (enic->pp.request) {
1266
1267 case PORT_REQUEST_ASSOCIATE:
1268
1269 if (!(enic->pp.set & ENIC_SET_NAME) || !strlen(enic->pp.name))
1270 return -EINVAL;
1271
1272 if (!is_valid_ether_addr(mac))
1273 return -EADDRNOTAVAIL;
1274
1275 vp = vic_provinfo_alloc(GFP_KERNEL, oui,
1276 VIC_PROVINFO_GENERIC_TYPE);
1277 if (!vp)
1278 return -ENOMEM;
1279
1280 vic_provinfo_add_tlv(vp,
1281 VIC_GENERIC_PROV_TLV_PORT_PROFILE_NAME_STR,
1282 strlen(enic->pp.name) + 1, enic->pp.name);
1283
1284 if (!is_zero_ether_addr(enic->pp.mac_addr))
1285 client_mac = enic->pp.mac_addr;
1286 else
1287 client_mac = mac;
1288
1289 vic_provinfo_add_tlv(vp,
1290 VIC_GENERIC_PROV_TLV_CLIENT_MAC_ADDR,
1291 ETH_ALEN, client_mac);
1292
1293 sprintf(client_mac_str, "%pM", client_mac);
1294 vic_provinfo_add_tlv(vp,
1295 VIC_GENERIC_PROV_TLV_CLUSTER_PORT_UUID_STR,
1296 sizeof(client_mac_str), client_mac_str);
1297
1298 if (enic->pp.set & ENIC_SET_INSTANCE) {
1299 sprintf(uuid_str, "%pUB", enic->pp.instance_uuid);
1300 vic_provinfo_add_tlv(vp,
1301 VIC_GENERIC_PROV_TLV_CLIENT_UUID_STR,
1302 sizeof(uuid_str), uuid_str);
1303 }
1304
1305 if (enic->pp.set & ENIC_SET_HOST) {
1306 sprintf(uuid_str, "%pUB", enic->pp.host_uuid);
1307 vic_provinfo_add_tlv(vp,
1308 VIC_GENERIC_PROV_TLV_HOST_UUID_STR,
1309 sizeof(uuid_str), uuid_str);
1310 }
1311
1312 os_type = htons(os_type);
1313 vic_provinfo_add_tlv(vp,
1314 VIC_GENERIC_PROV_TLV_OS_TYPE,
1315 sizeof(os_type), &os_type);
1316
1317 err = enic_dev_init_prov(enic, vp);
1318 vic_provinfo_free(vp);
1319 if (err)
1320 return err;
1321
1322 enic->pp.set |= ENIC_SET_APPLIED;
1323 break;
1324
1325 case PORT_REQUEST_DISASSOCIATE:
1326 enic->pp.set &= ~ENIC_SET_APPLIED;
1327 break;
1328
1329 default:
1330 return -EINVAL;
1331 }
1332
1333 return 0;
1334 }
1335
1336 static int enic_set_vf_port(struct net_device *netdev, int vf,
1337 struct nlattr *port[])
1338 {
1339 struct enic *enic = netdev_priv(netdev);
1340 struct enic_port_profile new_pp;
1341 int err = 0;
1342
1343 memset(&new_pp, 0, sizeof(new_pp));
1344
1345 if (port[IFLA_PORT_REQUEST]) {
1346 new_pp.set |= ENIC_SET_REQUEST;
1347 new_pp.request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1348 }
1349
1350 if (port[IFLA_PORT_PROFILE]) {
1351 new_pp.set |= ENIC_SET_NAME;
1352 memcpy(new_pp.name, nla_data(port[IFLA_PORT_PROFILE]),
1353 PORT_PROFILE_MAX);
1354 }
1355
1356 if (port[IFLA_PORT_INSTANCE_UUID]) {
1357 new_pp.set |= ENIC_SET_INSTANCE;
1358 memcpy(new_pp.instance_uuid,
1359 nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1360 }
1361
1362 if (port[IFLA_PORT_HOST_UUID]) {
1363 new_pp.set |= ENIC_SET_HOST;
1364 memcpy(new_pp.host_uuid,
1365 nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1366 }
1367
1368 /* don't support VFs, yet */
1369 if (vf != PORT_SELF_VF)
1370 return -EOPNOTSUPP;
1371
1372 if (!(new_pp.set & ENIC_SET_REQUEST))
1373 return -EOPNOTSUPP;
1374
1375 if (new_pp.request == PORT_REQUEST_ASSOCIATE) {
1376 /* Special case handling */
1377 if (!is_zero_ether_addr(enic->pp.vf_mac))
1378 memcpy(new_pp.mac_addr, enic->pp.vf_mac, ETH_ALEN);
1379
1380 if (is_zero_ether_addr(netdev->dev_addr))
1381 random_ether_addr(netdev->dev_addr);
1382 } else if (new_pp.request == PORT_REQUEST_DISASSOCIATE) {
1383 if (!is_zero_ether_addr(enic->pp.mac_addr))
1384 enic_dev_del_addr(enic, enic->pp.mac_addr);
1385 }
1386
1387 memcpy(&enic->pp, &new_pp, sizeof(struct enic_port_profile));
1388
1389 err = enic_set_port_profile(enic, netdev->dev_addr);
1390 if (err)
1391 goto set_port_profile_cleanup;
1392
1393 if (!is_zero_ether_addr(enic->pp.mac_addr))
1394 enic_dev_add_addr(enic, enic->pp.mac_addr);
1395
1396 set_port_profile_cleanup:
1397 memset(enic->pp.vf_mac, 0, ETH_ALEN);
1398
1399 if (err || enic->pp.request == PORT_REQUEST_DISASSOCIATE) {
1400 memset(netdev->dev_addr, 0, ETH_ALEN);
1401 memset(enic->pp.mac_addr, 0, ETH_ALEN);
1402 }
1403
1404 return err;
1405 }
1406
1407 static int enic_get_vf_port(struct net_device *netdev, int vf,
1408 struct sk_buff *skb)
1409 {
1410 struct enic *enic = netdev_priv(netdev);
1411 int err, error, done;
1412 u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1413
1414 if (!(enic->pp.set & ENIC_SET_APPLIED))
1415 return -ENODATA;
1416
1417 err = enic_dev_init_done(enic, &done, &error);
1418 if (err)
1419 error = err;
1420
1421 switch (error) {
1422 case ERR_SUCCESS:
1423 if (!done)
1424 response = PORT_PROFILE_RESPONSE_INPROGRESS;
1425 break;
1426 case ERR_EINVAL:
1427 response = PORT_PROFILE_RESPONSE_INVALID;
1428 break;
1429 case ERR_EBADSTATE:
1430 response = PORT_PROFILE_RESPONSE_BADSTATE;
1431 break;
1432 case ERR_ENOMEM:
1433 response = PORT_PROFILE_RESPONSE_INSUFFICIENT_RESOURCES;
1434 break;
1435 default:
1436 response = PORT_PROFILE_RESPONSE_ERROR;
1437 break;
1438 }
1439
1440 NLA_PUT_U16(skb, IFLA_PORT_REQUEST, enic->pp.request);
1441 NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
1442 if (enic->pp.set & ENIC_SET_NAME)
1443 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
1444 enic->pp.name);
1445 if (enic->pp.set & ENIC_SET_INSTANCE)
1446 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1447 enic->pp.instance_uuid);
1448 if (enic->pp.set & ENIC_SET_HOST)
1449 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
1450 enic->pp.host_uuid);
1451
1452 return 0;
1453
1454 nla_put_failure:
1455 return -EMSGSIZE;
1456 }
1457
1458 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1459 {
1460 struct enic *enic = vnic_dev_priv(rq->vdev);
1461
1462 if (!buf->os_buf)
1463 return;
1464
1465 pci_unmap_single(enic->pdev, buf->dma_addr,
1466 buf->len, PCI_DMA_FROMDEVICE);
1467 dev_kfree_skb_any(buf->os_buf);
1468 }
1469
1470 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1471 {
1472 struct enic *enic = vnic_dev_priv(rq->vdev);
1473 struct net_device *netdev = enic->netdev;
1474 struct sk_buff *skb;
1475 unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1476 unsigned int os_buf_index = 0;
1477 dma_addr_t dma_addr;
1478
1479 skb = netdev_alloc_skb_ip_align(netdev, len);
1480 if (!skb)
1481 return -ENOMEM;
1482
1483 dma_addr = pci_map_single(enic->pdev, skb->data,
1484 len, PCI_DMA_FROMDEVICE);
1485
1486 enic_queue_rq_desc(rq, skb, os_buf_index,
1487 dma_addr, len);
1488
1489 return 0;
1490 }
1491
1492 static int enic_rq_alloc_buf_a1(struct vnic_rq *rq)
1493 {
1494 struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
1495
1496 if (vnic_rq_posting_soon(rq)) {
1497
1498 /* SW workaround for A0 HW erratum: if we're just about
1499 * to write posted_index, insert a dummy desc
1500 * of type resvd
1501 */
1502
1503 rq_enet_desc_enc(desc, 0, RQ_ENET_TYPE_RESV2, 0);
1504 vnic_rq_post(rq, 0, 0, 0, 0);
1505 } else {
1506 return enic_rq_alloc_buf(rq);
1507 }
1508
1509 return 0;
1510 }
1511
1512 static int enic_dev_hw_version(struct enic *enic,
1513 enum vnic_dev_hw_version *hw_ver)
1514 {
1515 int err;
1516
1517 spin_lock(&enic->devcmd_lock);
1518 err = vnic_dev_hw_version(enic->vdev, hw_ver);
1519 spin_unlock(&enic->devcmd_lock);
1520
1521 return err;
1522 }
1523
1524 static int enic_set_rq_alloc_buf(struct enic *enic)
1525 {
1526 enum vnic_dev_hw_version hw_ver;
1527 int err;
1528
1529 err = enic_dev_hw_version(enic, &hw_ver);
1530 if (err)
1531 return err;
1532
1533 switch (hw_ver) {
1534 case VNIC_DEV_HW_VER_A1:
1535 enic->rq_alloc_buf = enic_rq_alloc_buf_a1;
1536 break;
1537 case VNIC_DEV_HW_VER_A2:
1538 case VNIC_DEV_HW_VER_UNKNOWN:
1539 enic->rq_alloc_buf = enic_rq_alloc_buf;
1540 break;
1541 default:
1542 return -ENODEV;
1543 }
1544
1545 return 0;
1546 }
1547
1548 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1549 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1550 int skipped, void *opaque)
1551 {
1552 struct enic *enic = vnic_dev_priv(rq->vdev);
1553 struct net_device *netdev = enic->netdev;
1554 struct sk_buff *skb;
1555
1556 u8 type, color, eop, sop, ingress_port, vlan_stripped;
1557 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1558 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1559 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1560 u8 packet_error;
1561 u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1562 u32 rss_hash;
1563
1564 if (skipped)
1565 return;
1566
1567 skb = buf->os_buf;
1568 prefetch(skb->data - NET_IP_ALIGN);
1569 pci_unmap_single(enic->pdev, buf->dma_addr,
1570 buf->len, PCI_DMA_FROMDEVICE);
1571
1572 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1573 &type, &color, &q_number, &completed_index,
1574 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1575 &csum_not_calc, &rss_hash, &bytes_written,
1576 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1577 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1578 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1579 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1580 &fcs_ok);
1581
1582 if (packet_error) {
1583
1584 if (!fcs_ok) {
1585 if (bytes_written > 0)
1586 enic->rq_bad_fcs++;
1587 else if (bytes_written == 0)
1588 enic->rq_truncated_pkts++;
1589 }
1590
1591 dev_kfree_skb_any(skb);
1592
1593 return;
1594 }
1595
1596 if (eop && bytes_written > 0) {
1597
1598 /* Good receive
1599 */
1600
1601 skb_put(skb, bytes_written);
1602 skb->protocol = eth_type_trans(skb, netdev);
1603
1604 if (enic->csum_rx_enabled && !csum_not_calc) {
1605 skb->csum = htons(checksum);
1606 skb->ip_summed = CHECKSUM_COMPLETE;
1607 }
1608
1609 skb->dev = netdev;
1610
1611 if (enic->vlan_group && vlan_stripped &&
1612 (vlan_tci & CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_MASK)) {
1613
1614 if (netdev->features & NETIF_F_GRO)
1615 vlan_gro_receive(&enic->napi[q_number],
1616 enic->vlan_group, vlan_tci, skb);
1617 else
1618 vlan_hwaccel_receive_skb(skb,
1619 enic->vlan_group, vlan_tci);
1620
1621 } else {
1622
1623 if (netdev->features & NETIF_F_GRO)
1624 napi_gro_receive(&enic->napi[q_number], skb);
1625 else
1626 netif_receive_skb(skb);
1627
1628 }
1629 } else {
1630
1631 /* Buffer overflow
1632 */
1633
1634 dev_kfree_skb_any(skb);
1635 }
1636 }
1637
1638 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1639 u8 type, u16 q_number, u16 completed_index, void *opaque)
1640 {
1641 struct enic *enic = vnic_dev_priv(vdev);
1642
1643 vnic_rq_service(&enic->rq[q_number], cq_desc,
1644 completed_index, VNIC_RQ_RETURN_DESC,
1645 enic_rq_indicate_buf, opaque);
1646
1647 return 0;
1648 }
1649
1650 static int enic_poll(struct napi_struct *napi, int budget)
1651 {
1652 struct net_device *netdev = napi->dev;
1653 struct enic *enic = netdev_priv(netdev);
1654 unsigned int cq_rq = enic_cq_rq(enic, 0);
1655 unsigned int cq_wq = enic_cq_wq(enic, 0);
1656 unsigned int intr = enic_legacy_io_intr();
1657 unsigned int rq_work_to_do = budget;
1658 unsigned int wq_work_to_do = -1; /* no limit */
1659 unsigned int work_done, rq_work_done, wq_work_done;
1660 int err;
1661
1662 /* Service RQ (first) and WQ
1663 */
1664
1665 rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1666 rq_work_to_do, enic_rq_service, NULL);
1667
1668 wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
1669 wq_work_to_do, enic_wq_service, NULL);
1670
1671 /* Accumulate intr event credits for this polling
1672 * cycle. An intr event is the completion of a
1673 * a WQ or RQ packet.
1674 */
1675
1676 work_done = rq_work_done + wq_work_done;
1677
1678 if (work_done > 0)
1679 vnic_intr_return_credits(&enic->intr[intr],
1680 work_done,
1681 0 /* don't unmask intr */,
1682 0 /* don't reset intr timer */);
1683
1684 err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
1685
1686 /* Buffer allocation failed. Stay in polling
1687 * mode so we can try to fill the ring again.
1688 */
1689
1690 if (err)
1691 rq_work_done = rq_work_to_do;
1692
1693 if (rq_work_done < rq_work_to_do) {
1694
1695 /* Some work done, but not enough to stay in polling,
1696 * exit polling
1697 */
1698
1699 napi_complete(napi);
1700 vnic_intr_unmask(&enic->intr[intr]);
1701 }
1702
1703 return rq_work_done;
1704 }
1705
1706 static int enic_poll_msix(struct napi_struct *napi, int budget)
1707 {
1708 struct net_device *netdev = napi->dev;
1709 struct enic *enic = netdev_priv(netdev);
1710 unsigned int rq = (napi - &enic->napi[0]);
1711 unsigned int cq = enic_cq_rq(enic, rq);
1712 unsigned int intr = enic_msix_rq_intr(enic, rq);
1713 unsigned int work_to_do = budget;
1714 unsigned int work_done;
1715 int err;
1716
1717 /* Service RQ
1718 */
1719
1720 work_done = vnic_cq_service(&enic->cq[cq],
1721 work_to_do, enic_rq_service, NULL);
1722
1723 /* Return intr event credits for this polling
1724 * cycle. An intr event is the completion of a
1725 * RQ packet.
1726 */
1727
1728 if (work_done > 0)
1729 vnic_intr_return_credits(&enic->intr[intr],
1730 work_done,
1731 0 /* don't unmask intr */,
1732 0 /* don't reset intr timer */);
1733
1734 err = vnic_rq_fill(&enic->rq[rq], enic->rq_alloc_buf);
1735
1736 /* Buffer allocation failed. Stay in polling mode
1737 * so we can try to fill the ring again.
1738 */
1739
1740 if (err)
1741 work_done = work_to_do;
1742
1743 if (work_done < work_to_do) {
1744
1745 /* Some work done, but not enough to stay in polling,
1746 * exit polling
1747 */
1748
1749 napi_complete(napi);
1750 vnic_intr_unmask(&enic->intr[intr]);
1751 }
1752
1753 return work_done;
1754 }
1755
1756 static void enic_notify_timer(unsigned long data)
1757 {
1758 struct enic *enic = (struct enic *)data;
1759
1760 enic_notify_check(enic);
1761
1762 mod_timer(&enic->notify_timer,
1763 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1764 }
1765
1766 static void enic_free_intr(struct enic *enic)
1767 {
1768 struct net_device *netdev = enic->netdev;
1769 unsigned int i;
1770
1771 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1772 case VNIC_DEV_INTR_MODE_INTX:
1773 free_irq(enic->pdev->irq, netdev);
1774 break;
1775 case VNIC_DEV_INTR_MODE_MSI:
1776 free_irq(enic->pdev->irq, enic);
1777 break;
1778 case VNIC_DEV_INTR_MODE_MSIX:
1779 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1780 if (enic->msix[i].requested)
1781 free_irq(enic->msix_entry[i].vector,
1782 enic->msix[i].devid);
1783 break;
1784 default:
1785 break;
1786 }
1787 }
1788
1789 static int enic_request_intr(struct enic *enic)
1790 {
1791 struct net_device *netdev = enic->netdev;
1792 unsigned int i, intr;
1793 int err = 0;
1794
1795 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1796
1797 case VNIC_DEV_INTR_MODE_INTX:
1798
1799 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1800 IRQF_SHARED, netdev->name, netdev);
1801 break;
1802
1803 case VNIC_DEV_INTR_MODE_MSI:
1804
1805 err = request_irq(enic->pdev->irq, enic_isr_msi,
1806 0, netdev->name, enic);
1807 break;
1808
1809 case VNIC_DEV_INTR_MODE_MSIX:
1810
1811 for (i = 0; i < enic->rq_count; i++) {
1812 intr = enic_msix_rq_intr(enic, i);
1813 sprintf(enic->msix[intr].devname,
1814 "%.11s-rx-%d", netdev->name, i);
1815 enic->msix[intr].isr = enic_isr_msix_rq;
1816 enic->msix[intr].devid = &enic->napi[i];
1817 }
1818
1819 for (i = 0; i < enic->wq_count; i++) {
1820 intr = enic_msix_wq_intr(enic, i);
1821 sprintf(enic->msix[intr].devname,
1822 "%.11s-tx-%d", netdev->name, i);
1823 enic->msix[intr].isr = enic_isr_msix_wq;
1824 enic->msix[intr].devid = enic;
1825 }
1826
1827 intr = enic_msix_err_intr(enic);
1828 sprintf(enic->msix[intr].devname,
1829 "%.11s-err", netdev->name);
1830 enic->msix[intr].isr = enic_isr_msix_err;
1831 enic->msix[intr].devid = enic;
1832
1833 intr = enic_msix_notify_intr(enic);
1834 sprintf(enic->msix[intr].devname,
1835 "%.11s-notify", netdev->name);
1836 enic->msix[intr].isr = enic_isr_msix_notify;
1837 enic->msix[intr].devid = enic;
1838
1839 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1840 enic->msix[i].requested = 0;
1841
1842 for (i = 0; i < enic->intr_count; i++) {
1843 err = request_irq(enic->msix_entry[i].vector,
1844 enic->msix[i].isr, 0,
1845 enic->msix[i].devname,
1846 enic->msix[i].devid);
1847 if (err) {
1848 enic_free_intr(enic);
1849 break;
1850 }
1851 enic->msix[i].requested = 1;
1852 }
1853
1854 break;
1855
1856 default:
1857 break;
1858 }
1859
1860 return err;
1861 }
1862
1863 static void enic_synchronize_irqs(struct enic *enic)
1864 {
1865 unsigned int i;
1866
1867 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1868 case VNIC_DEV_INTR_MODE_INTX:
1869 case VNIC_DEV_INTR_MODE_MSI:
1870 synchronize_irq(enic->pdev->irq);
1871 break;
1872 case VNIC_DEV_INTR_MODE_MSIX:
1873 for (i = 0; i < enic->intr_count; i++)
1874 synchronize_irq(enic->msix_entry[i].vector);
1875 break;
1876 default:
1877 break;
1878 }
1879 }
1880
1881 static int enic_dev_notify_set(struct enic *enic)
1882 {
1883 int err;
1884
1885 spin_lock(&enic->devcmd_lock);
1886 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1887 case VNIC_DEV_INTR_MODE_INTX:
1888 err = vnic_dev_notify_set(enic->vdev,
1889 enic_legacy_notify_intr());
1890 break;
1891 case VNIC_DEV_INTR_MODE_MSIX:
1892 err = vnic_dev_notify_set(enic->vdev,
1893 enic_msix_notify_intr(enic));
1894 break;
1895 default:
1896 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1897 break;
1898 }
1899 spin_unlock(&enic->devcmd_lock);
1900
1901 return err;
1902 }
1903
1904 static int enic_dev_notify_unset(struct enic *enic)
1905 {
1906 int err;
1907
1908 spin_lock(&enic->devcmd_lock);
1909 err = vnic_dev_notify_unset(enic->vdev);
1910 spin_unlock(&enic->devcmd_lock);
1911
1912 return err;
1913 }
1914
1915 static int enic_dev_enable(struct enic *enic)
1916 {
1917 int err;
1918
1919 spin_lock(&enic->devcmd_lock);
1920 err = vnic_dev_enable_wait(enic->vdev);
1921 spin_unlock(&enic->devcmd_lock);
1922
1923 return err;
1924 }
1925
1926 static int enic_dev_disable(struct enic *enic)
1927 {
1928 int err;
1929
1930 spin_lock(&enic->devcmd_lock);
1931 err = vnic_dev_disable(enic->vdev);
1932 spin_unlock(&enic->devcmd_lock);
1933
1934 return err;
1935 }
1936
1937 static void enic_notify_timer_start(struct enic *enic)
1938 {
1939 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1940 case VNIC_DEV_INTR_MODE_MSI:
1941 mod_timer(&enic->notify_timer, jiffies);
1942 break;
1943 default:
1944 /* Using intr for notification for INTx/MSI-X */
1945 break;
1946 };
1947 }
1948
1949 /* rtnl lock is held, process context */
1950 static int enic_open(struct net_device *netdev)
1951 {
1952 struct enic *enic = netdev_priv(netdev);
1953 unsigned int i;
1954 int err;
1955
1956 err = enic_request_intr(enic);
1957 if (err) {
1958 netdev_err(netdev, "Unable to request irq.\n");
1959 return err;
1960 }
1961
1962 err = enic_dev_notify_set(enic);
1963 if (err) {
1964 netdev_err(netdev,
1965 "Failed to alloc notify buffer, aborting.\n");
1966 goto err_out_free_intr;
1967 }
1968
1969 for (i = 0; i < enic->rq_count; i++) {
1970 vnic_rq_fill(&enic->rq[i], enic->rq_alloc_buf);
1971 /* Need at least one buffer on ring to get going */
1972 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1973 netdev_err(netdev, "Unable to alloc receive buffers\n");
1974 err = -ENOMEM;
1975 goto err_out_notify_unset;
1976 }
1977 }
1978
1979 for (i = 0; i < enic->wq_count; i++)
1980 vnic_wq_enable(&enic->wq[i]);
1981 for (i = 0; i < enic->rq_count; i++)
1982 vnic_rq_enable(&enic->rq[i]);
1983
1984 if (enic_is_dynamic(enic) && !is_zero_ether_addr(enic->pp.mac_addr))
1985 enic_dev_add_addr(enic, enic->pp.mac_addr);
1986 else
1987 enic_dev_add_station_addr(enic);
1988 enic_set_rx_mode(netdev);
1989
1990 netif_wake_queue(netdev);
1991
1992 for (i = 0; i < enic->rq_count; i++)
1993 napi_enable(&enic->napi[i]);
1994
1995 enic_dev_enable(enic);
1996
1997 for (i = 0; i < enic->intr_count; i++)
1998 vnic_intr_unmask(&enic->intr[i]);
1999
2000 enic_notify_timer_start(enic);
2001
2002 return 0;
2003
2004 err_out_notify_unset:
2005 enic_dev_notify_unset(enic);
2006 err_out_free_intr:
2007 enic_free_intr(enic);
2008
2009 return err;
2010 }
2011
2012 /* rtnl lock is held, process context */
2013 static int enic_stop(struct net_device *netdev)
2014 {
2015 struct enic *enic = netdev_priv(netdev);
2016 unsigned int i;
2017 int err;
2018
2019 for (i = 0; i < enic->intr_count; i++) {
2020 vnic_intr_mask(&enic->intr[i]);
2021 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
2022 }
2023
2024 enic_synchronize_irqs(enic);
2025
2026 del_timer_sync(&enic->notify_timer);
2027
2028 enic_dev_disable(enic);
2029
2030 for (i = 0; i < enic->rq_count; i++)
2031 napi_disable(&enic->napi[i]);
2032
2033 netif_carrier_off(netdev);
2034 netif_tx_disable(netdev);
2035 if (enic_is_dynamic(enic) && !is_zero_ether_addr(enic->pp.mac_addr))
2036 enic_dev_del_addr(enic, enic->pp.mac_addr);
2037 else
2038 enic_dev_del_station_addr(enic);
2039
2040 for (i = 0; i < enic->wq_count; i++) {
2041 err = vnic_wq_disable(&enic->wq[i]);
2042 if (err)
2043 return err;
2044 }
2045 for (i = 0; i < enic->rq_count; i++) {
2046 err = vnic_rq_disable(&enic->rq[i]);
2047 if (err)
2048 return err;
2049 }
2050
2051 enic_dev_notify_unset(enic);
2052 enic_free_intr(enic);
2053
2054 for (i = 0; i < enic->wq_count; i++)
2055 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
2056 for (i = 0; i < enic->rq_count; i++)
2057 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
2058 for (i = 0; i < enic->cq_count; i++)
2059 vnic_cq_clean(&enic->cq[i]);
2060 for (i = 0; i < enic->intr_count; i++)
2061 vnic_intr_clean(&enic->intr[i]);
2062
2063 return 0;
2064 }
2065
2066 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
2067 {
2068 struct enic *enic = netdev_priv(netdev);
2069 int running = netif_running(netdev);
2070
2071 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
2072 return -EINVAL;
2073
2074 if (running)
2075 enic_stop(netdev);
2076
2077 netdev->mtu = new_mtu;
2078
2079 if (netdev->mtu > enic->port_mtu)
2080 netdev_warn(netdev,
2081 "interface MTU (%d) set higher than port MTU (%d)\n",
2082 netdev->mtu, enic->port_mtu);
2083
2084 if (running)
2085 enic_open(netdev);
2086
2087 return 0;
2088 }
2089
2090 #ifdef CONFIG_NET_POLL_CONTROLLER
2091 static void enic_poll_controller(struct net_device *netdev)
2092 {
2093 struct enic *enic = netdev_priv(netdev);
2094 struct vnic_dev *vdev = enic->vdev;
2095 unsigned int i, intr;
2096
2097 switch (vnic_dev_get_intr_mode(vdev)) {
2098 case VNIC_DEV_INTR_MODE_MSIX:
2099 for (i = 0; i < enic->rq_count; i++) {
2100 intr = enic_msix_rq_intr(enic, i);
2101 enic_isr_msix_rq(enic->msix_entry[intr].vector,
2102 &enic->napi[i]);
2103 }
2104 intr = enic_msix_wq_intr(enic, i);
2105 enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
2106 break;
2107 case VNIC_DEV_INTR_MODE_MSI:
2108 enic_isr_msi(enic->pdev->irq, enic);
2109 break;
2110 case VNIC_DEV_INTR_MODE_INTX:
2111 enic_isr_legacy(enic->pdev->irq, netdev);
2112 break;
2113 default:
2114 break;
2115 }
2116 }
2117 #endif
2118
2119 static int enic_dev_wait(struct vnic_dev *vdev,
2120 int (*start)(struct vnic_dev *, int),
2121 int (*finished)(struct vnic_dev *, int *),
2122 int arg)
2123 {
2124 unsigned long time;
2125 int done;
2126 int err;
2127
2128 BUG_ON(in_interrupt());
2129
2130 err = start(vdev, arg);
2131 if (err)
2132 return err;
2133
2134 /* Wait for func to complete...2 seconds max
2135 */
2136
2137 time = jiffies + (HZ * 2);
2138 do {
2139
2140 err = finished(vdev, &done);
2141 if (err)
2142 return err;
2143
2144 if (done)
2145 return 0;
2146
2147 schedule_timeout_uninterruptible(HZ / 10);
2148
2149 } while (time_after(time, jiffies));
2150
2151 return -ETIMEDOUT;
2152 }
2153
2154 static int enic_dev_open(struct enic *enic)
2155 {
2156 int err;
2157
2158 err = enic_dev_wait(enic->vdev, vnic_dev_open,
2159 vnic_dev_open_done, 0);
2160 if (err)
2161 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
2162 err);
2163
2164 return err;
2165 }
2166
2167 static int enic_dev_hang_reset(struct enic *enic)
2168 {
2169 int err;
2170
2171 err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
2172 vnic_dev_hang_reset_done, 0);
2173 if (err)
2174 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
2175 err);
2176
2177 return err;
2178 }
2179
2180 static int enic_set_rsskey(struct enic *enic)
2181 {
2182 dma_addr_t rss_key_buf_pa;
2183 union vnic_rss_key *rss_key_buf_va = NULL;
2184 union vnic_rss_key rss_key = {
2185 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
2186 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
2187 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
2188 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
2189 };
2190 int err;
2191
2192 rss_key_buf_va = pci_alloc_consistent(enic->pdev,
2193 sizeof(union vnic_rss_key), &rss_key_buf_pa);
2194 if (!rss_key_buf_va)
2195 return -ENOMEM;
2196
2197 memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
2198
2199 spin_lock(&enic->devcmd_lock);
2200 err = enic_set_rss_key(enic,
2201 rss_key_buf_pa,
2202 sizeof(union vnic_rss_key));
2203 spin_unlock(&enic->devcmd_lock);
2204
2205 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
2206 rss_key_buf_va, rss_key_buf_pa);
2207
2208 return err;
2209 }
2210
2211 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
2212 {
2213 dma_addr_t rss_cpu_buf_pa;
2214 union vnic_rss_cpu *rss_cpu_buf_va = NULL;
2215 unsigned int i;
2216 int err;
2217
2218 rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
2219 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
2220 if (!rss_cpu_buf_va)
2221 return -ENOMEM;
2222
2223 for (i = 0; i < (1 << rss_hash_bits); i++)
2224 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
2225
2226 spin_lock(&enic->devcmd_lock);
2227 err = enic_set_rss_cpu(enic,
2228 rss_cpu_buf_pa,
2229 sizeof(union vnic_rss_cpu));
2230 spin_unlock(&enic->devcmd_lock);
2231
2232 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
2233 rss_cpu_buf_va, rss_cpu_buf_pa);
2234
2235 return err;
2236 }
2237
2238 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
2239 u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
2240 {
2241 const u8 tso_ipid_split_en = 0;
2242 const u8 ig_vlan_strip_en = 1;
2243 int err;
2244
2245 /* Enable VLAN tag stripping.
2246 */
2247
2248 spin_lock(&enic->devcmd_lock);
2249 err = enic_set_nic_cfg(enic,
2250 rss_default_cpu, rss_hash_type,
2251 rss_hash_bits, rss_base_cpu,
2252 rss_enable, tso_ipid_split_en,
2253 ig_vlan_strip_en);
2254 spin_unlock(&enic->devcmd_lock);
2255
2256 return err;
2257 }
2258
2259 static int enic_set_rss_nic_cfg(struct enic *enic)
2260 {
2261 struct device *dev = enic_get_dev(enic);
2262 const u8 rss_default_cpu = 0;
2263 const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
2264 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
2265 NIC_CFG_RSS_HASH_TYPE_IPV6 |
2266 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
2267 const u8 rss_hash_bits = 7;
2268 const u8 rss_base_cpu = 0;
2269 u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
2270
2271 if (rss_enable) {
2272 if (!enic_set_rsskey(enic)) {
2273 if (enic_set_rsscpu(enic, rss_hash_bits)) {
2274 rss_enable = 0;
2275 dev_warn(dev, "RSS disabled, "
2276 "Failed to set RSS cpu indirection table.");
2277 }
2278 } else {
2279 rss_enable = 0;
2280 dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
2281 }
2282 }
2283
2284 return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
2285 rss_hash_bits, rss_base_cpu, rss_enable);
2286 }
2287
2288 static int enic_dev_hang_notify(struct enic *enic)
2289 {
2290 int err;
2291
2292 spin_lock(&enic->devcmd_lock);
2293 err = vnic_dev_hang_notify(enic->vdev);
2294 spin_unlock(&enic->devcmd_lock);
2295
2296 return err;
2297 }
2298
2299 static int enic_dev_set_ig_vlan_rewrite_mode(struct enic *enic)
2300 {
2301 int err;
2302
2303 spin_lock(&enic->devcmd_lock);
2304 err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
2305 IG_VLAN_REWRITE_MODE_PRIORITY_TAG_DEFAULT_VLAN);
2306 spin_unlock(&enic->devcmd_lock);
2307
2308 return err;
2309 }
2310
2311 static void enic_reset(struct work_struct *work)
2312 {
2313 struct enic *enic = container_of(work, struct enic, reset);
2314
2315 if (!netif_running(enic->netdev))
2316 return;
2317
2318 rtnl_lock();
2319
2320 enic_dev_hang_notify(enic);
2321 enic_stop(enic->netdev);
2322 enic_dev_hang_reset(enic);
2323 enic_reset_multicast_list(enic);
2324 enic_init_vnic_resources(enic);
2325 enic_set_rss_nic_cfg(enic);
2326 enic_dev_set_ig_vlan_rewrite_mode(enic);
2327 enic_open(enic->netdev);
2328
2329 rtnl_unlock();
2330 }
2331
2332 static int enic_set_intr_mode(struct enic *enic)
2333 {
2334 unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
2335 unsigned int m = 1;
2336 unsigned int i;
2337
2338 /* Set interrupt mode (INTx, MSI, MSI-X) depending
2339 * on system capabilities.
2340 *
2341 * Try MSI-X first
2342 *
2343 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2344 * (the second to last INTR is used for WQ/RQ errors)
2345 * (the last INTR is used for notifications)
2346 */
2347
2348 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2349 for (i = 0; i < n + m + 2; i++)
2350 enic->msix_entry[i].entry = i;
2351
2352 /* Use multiple RQs if RSS is enabled
2353 */
2354
2355 if (ENIC_SETTING(enic, RSS) &&
2356 enic->config.intr_mode < 1 &&
2357 enic->rq_count >= n &&
2358 enic->wq_count >= m &&
2359 enic->cq_count >= n + m &&
2360 enic->intr_count >= n + m + 2) {
2361
2362 if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
2363
2364 enic->rq_count = n;
2365 enic->wq_count = m;
2366 enic->cq_count = n + m;
2367 enic->intr_count = n + m + 2;
2368
2369 vnic_dev_set_intr_mode(enic->vdev,
2370 VNIC_DEV_INTR_MODE_MSIX);
2371
2372 return 0;
2373 }
2374 }
2375
2376 if (enic->config.intr_mode < 1 &&
2377 enic->rq_count >= 1 &&
2378 enic->wq_count >= m &&
2379 enic->cq_count >= 1 + m &&
2380 enic->intr_count >= 1 + m + 2) {
2381 if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
2382
2383 enic->rq_count = 1;
2384 enic->wq_count = m;
2385 enic->cq_count = 1 + m;
2386 enic->intr_count = 1 + m + 2;
2387
2388 vnic_dev_set_intr_mode(enic->vdev,
2389 VNIC_DEV_INTR_MODE_MSIX);
2390
2391 return 0;
2392 }
2393 }
2394
2395 /* Next try MSI
2396 *
2397 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2398 */
2399
2400 if (enic->config.intr_mode < 2 &&
2401 enic->rq_count >= 1 &&
2402 enic->wq_count >= 1 &&
2403 enic->cq_count >= 2 &&
2404 enic->intr_count >= 1 &&
2405 !pci_enable_msi(enic->pdev)) {
2406
2407 enic->rq_count = 1;
2408 enic->wq_count = 1;
2409 enic->cq_count = 2;
2410 enic->intr_count = 1;
2411
2412 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2413
2414 return 0;
2415 }
2416
2417 /* Next try INTx
2418 *
2419 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2420 * (the first INTR is used for WQ/RQ)
2421 * (the second INTR is used for WQ/RQ errors)
2422 * (the last INTR is used for notifications)
2423 */
2424
2425 if (enic->config.intr_mode < 3 &&
2426 enic->rq_count >= 1 &&
2427 enic->wq_count >= 1 &&
2428 enic->cq_count >= 2 &&
2429 enic->intr_count >= 3) {
2430
2431 enic->rq_count = 1;
2432 enic->wq_count = 1;
2433 enic->cq_count = 2;
2434 enic->intr_count = 3;
2435
2436 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2437
2438 return 0;
2439 }
2440
2441 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2442
2443 return -EINVAL;
2444 }
2445
2446 static void enic_clear_intr_mode(struct enic *enic)
2447 {
2448 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2449 case VNIC_DEV_INTR_MODE_MSIX:
2450 pci_disable_msix(enic->pdev);
2451 break;
2452 case VNIC_DEV_INTR_MODE_MSI:
2453 pci_disable_msi(enic->pdev);
2454 break;
2455 default:
2456 break;
2457 }
2458
2459 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2460 }
2461
2462 static const struct net_device_ops enic_netdev_dynamic_ops = {
2463 .ndo_open = enic_open,
2464 .ndo_stop = enic_stop,
2465 .ndo_start_xmit = enic_hard_start_xmit,
2466 .ndo_get_stats = enic_get_stats,
2467 .ndo_validate_addr = eth_validate_addr,
2468 .ndo_set_rx_mode = enic_set_rx_mode,
2469 .ndo_set_multicast_list = enic_set_rx_mode,
2470 .ndo_set_mac_address = enic_set_mac_address_dynamic,
2471 .ndo_change_mtu = enic_change_mtu,
2472 .ndo_vlan_rx_register = enic_vlan_rx_register,
2473 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2474 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2475 .ndo_tx_timeout = enic_tx_timeout,
2476 .ndo_set_vf_port = enic_set_vf_port,
2477 .ndo_get_vf_port = enic_get_vf_port,
2478 #ifdef IFLA_VF_MAX
2479 .ndo_set_vf_mac = enic_set_vf_mac,
2480 #endif
2481 #ifdef CONFIG_NET_POLL_CONTROLLER
2482 .ndo_poll_controller = enic_poll_controller,
2483 #endif
2484 };
2485
2486 static const struct net_device_ops enic_netdev_ops = {
2487 .ndo_open = enic_open,
2488 .ndo_stop = enic_stop,
2489 .ndo_start_xmit = enic_hard_start_xmit,
2490 .ndo_get_stats = enic_get_stats,
2491 .ndo_validate_addr = eth_validate_addr,
2492 .ndo_set_mac_address = enic_set_mac_address,
2493 .ndo_set_rx_mode = enic_set_rx_mode,
2494 .ndo_set_multicast_list = enic_set_rx_mode,
2495 .ndo_change_mtu = enic_change_mtu,
2496 .ndo_vlan_rx_register = enic_vlan_rx_register,
2497 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2498 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2499 .ndo_tx_timeout = enic_tx_timeout,
2500 #ifdef CONFIG_NET_POLL_CONTROLLER
2501 .ndo_poll_controller = enic_poll_controller,
2502 #endif
2503 };
2504
2505 static void enic_dev_deinit(struct enic *enic)
2506 {
2507 unsigned int i;
2508
2509 for (i = 0; i < enic->rq_count; i++)
2510 netif_napi_del(&enic->napi[i]);
2511
2512 enic_free_vnic_resources(enic);
2513 enic_clear_intr_mode(enic);
2514 }
2515
2516 static int enic_dev_init(struct enic *enic)
2517 {
2518 struct device *dev = enic_get_dev(enic);
2519 struct net_device *netdev = enic->netdev;
2520 unsigned int i;
2521 int err;
2522
2523 /* Get vNIC configuration
2524 */
2525
2526 err = enic_get_vnic_config(enic);
2527 if (err) {
2528 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2529 return err;
2530 }
2531
2532 /* Get available resource counts
2533 */
2534
2535 enic_get_res_counts(enic);
2536
2537 /* Set interrupt mode based on resource counts and system
2538 * capabilities
2539 */
2540
2541 err = enic_set_intr_mode(enic);
2542 if (err) {
2543 dev_err(dev, "Failed to set intr mode based on resource "
2544 "counts and system capabilities, aborting\n");
2545 return err;
2546 }
2547
2548 /* Allocate and configure vNIC resources
2549 */
2550
2551 err = enic_alloc_vnic_resources(enic);
2552 if (err) {
2553 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2554 goto err_out_free_vnic_resources;
2555 }
2556
2557 enic_init_vnic_resources(enic);
2558
2559 err = enic_set_rq_alloc_buf(enic);
2560 if (err) {
2561 dev_err(dev, "Failed to set RQ buffer allocator, aborting\n");
2562 goto err_out_free_vnic_resources;
2563 }
2564
2565 err = enic_set_rss_nic_cfg(enic);
2566 if (err) {
2567 dev_err(dev, "Failed to config nic, aborting\n");
2568 goto err_out_free_vnic_resources;
2569 }
2570
2571 err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2572 if (err) {
2573 dev_err(dev,
2574 "Failed to set ingress vlan rewrite mode, aborting.\n");
2575 goto err_out_free_vnic_resources;
2576 }
2577
2578 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2579 default:
2580 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2581 break;
2582 case VNIC_DEV_INTR_MODE_MSIX:
2583 for (i = 0; i < enic->rq_count; i++)
2584 netif_napi_add(netdev, &enic->napi[i],
2585 enic_poll_msix, 64);
2586 break;
2587 }
2588
2589 return 0;
2590
2591 err_out_free_vnic_resources:
2592 enic_clear_intr_mode(enic);
2593 enic_free_vnic_resources(enic);
2594
2595 return err;
2596 }
2597
2598 static void enic_iounmap(struct enic *enic)
2599 {
2600 unsigned int i;
2601
2602 for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2603 if (enic->bar[i].vaddr)
2604 iounmap(enic->bar[i].vaddr);
2605 }
2606
2607 static int __devinit enic_probe(struct pci_dev *pdev,
2608 const struct pci_device_id *ent)
2609 {
2610 struct device *dev = &pdev->dev;
2611 struct net_device *netdev;
2612 struct enic *enic;
2613 int using_dac = 0;
2614 unsigned int i;
2615 int err;
2616
2617 /* Allocate net device structure and initialize. Private
2618 * instance data is initialized to zero.
2619 */
2620
2621 netdev = alloc_etherdev(sizeof(struct enic));
2622 if (!netdev) {
2623 pr_err("Etherdev alloc failed, aborting\n");
2624 return -ENOMEM;
2625 }
2626
2627 pci_set_drvdata(pdev, netdev);
2628
2629 SET_NETDEV_DEV(netdev, &pdev->dev);
2630
2631 enic = netdev_priv(netdev);
2632 enic->netdev = netdev;
2633 enic->pdev = pdev;
2634
2635 /* Setup PCI resources
2636 */
2637
2638 err = pci_enable_device_mem(pdev);
2639 if (err) {
2640 dev_err(dev, "Cannot enable PCI device, aborting\n");
2641 goto err_out_free_netdev;
2642 }
2643
2644 err = pci_request_regions(pdev, DRV_NAME);
2645 if (err) {
2646 dev_err(dev, "Cannot request PCI regions, aborting\n");
2647 goto err_out_disable_device;
2648 }
2649
2650 pci_set_master(pdev);
2651
2652 /* Query PCI controller on system for DMA addressing
2653 * limitation for the device. Try 40-bit first, and
2654 * fail to 32-bit.
2655 */
2656
2657 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2658 if (err) {
2659 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2660 if (err) {
2661 dev_err(dev, "No usable DMA configuration, aborting\n");
2662 goto err_out_release_regions;
2663 }
2664 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2665 if (err) {
2666 dev_err(dev, "Unable to obtain %u-bit DMA "
2667 "for consistent allocations, aborting\n", 32);
2668 goto err_out_release_regions;
2669 }
2670 } else {
2671 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2672 if (err) {
2673 dev_err(dev, "Unable to obtain %u-bit DMA "
2674 "for consistent allocations, aborting\n", 40);
2675 goto err_out_release_regions;
2676 }
2677 using_dac = 1;
2678 }
2679
2680 /* Map vNIC resources from BAR0-5
2681 */
2682
2683 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2684 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2685 continue;
2686 enic->bar[i].len = pci_resource_len(pdev, i);
2687 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2688 if (!enic->bar[i].vaddr) {
2689 dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2690 err = -ENODEV;
2691 goto err_out_iounmap;
2692 }
2693 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2694 }
2695
2696 /* Register vNIC device
2697 */
2698
2699 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2700 ARRAY_SIZE(enic->bar));
2701 if (!enic->vdev) {
2702 dev_err(dev, "vNIC registration failed, aborting\n");
2703 err = -ENODEV;
2704 goto err_out_iounmap;
2705 }
2706
2707 /* Issue device open to get device in known state
2708 */
2709
2710 err = enic_dev_open(enic);
2711 if (err) {
2712 dev_err(dev, "vNIC dev open failed, aborting\n");
2713 goto err_out_vnic_unregister;
2714 }
2715
2716 /* Issue device init to initialize the vnic-to-switch link.
2717 * We'll start with carrier off and wait for link UP
2718 * notification later to turn on carrier. We don't need
2719 * to wait here for the vnic-to-switch link initialization
2720 * to complete; link UP notification is the indication that
2721 * the process is complete.
2722 */
2723
2724 netif_carrier_off(netdev);
2725
2726 /* Do not call dev_init for a dynamic vnic.
2727 * For a dynamic vnic, init_prov_info will be
2728 * called later by an upper layer.
2729 */
2730
2731 if (!enic_is_dynamic(enic)) {
2732 err = vnic_dev_init(enic->vdev, 0);
2733 if (err) {
2734 dev_err(dev, "vNIC dev init failed, aborting\n");
2735 goto err_out_dev_close;
2736 }
2737 }
2738
2739 /* Setup devcmd lock
2740 */
2741
2742 spin_lock_init(&enic->devcmd_lock);
2743
2744 err = enic_dev_init(enic);
2745 if (err) {
2746 dev_err(dev, "Device initialization failed, aborting\n");
2747 goto err_out_dev_close;
2748 }
2749
2750 /* Setup notification timer, HW reset task, and wq locks
2751 */
2752
2753 init_timer(&enic->notify_timer);
2754 enic->notify_timer.function = enic_notify_timer;
2755 enic->notify_timer.data = (unsigned long)enic;
2756
2757 INIT_WORK(&enic->reset, enic_reset);
2758
2759 for (i = 0; i < enic->wq_count; i++)
2760 spin_lock_init(&enic->wq_lock[i]);
2761
2762 /* Register net device
2763 */
2764
2765 enic->port_mtu = enic->config.mtu;
2766 (void)enic_change_mtu(netdev, enic->port_mtu);
2767
2768 err = enic_set_mac_addr(netdev, enic->mac_addr);
2769 if (err) {
2770 dev_err(dev, "Invalid MAC address, aborting\n");
2771 goto err_out_dev_deinit;
2772 }
2773
2774 enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2775 enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2776
2777 if (enic_is_dynamic(enic))
2778 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2779 else
2780 netdev->netdev_ops = &enic_netdev_ops;
2781
2782 netdev->watchdog_timeo = 2 * HZ;
2783 netdev->ethtool_ops = &enic_ethtool_ops;
2784
2785 netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2786 if (ENIC_SETTING(enic, LOOP)) {
2787 netdev->features &= ~NETIF_F_HW_VLAN_TX;
2788 enic->loop_enable = 1;
2789 enic->loop_tag = enic->config.loop_tag;
2790 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2791 }
2792 if (ENIC_SETTING(enic, TXCSUM))
2793 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2794 if (ENIC_SETTING(enic, TSO))
2795 netdev->features |= NETIF_F_TSO |
2796 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2797 if (ENIC_SETTING(enic, LRO))
2798 netdev->features |= NETIF_F_GRO;
2799 if (using_dac)
2800 netdev->features |= NETIF_F_HIGHDMA;
2801
2802 enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
2803
2804 err = register_netdev(netdev);
2805 if (err) {
2806 dev_err(dev, "Cannot register net device, aborting\n");
2807 goto err_out_dev_deinit;
2808 }
2809
2810 return 0;
2811
2812 err_out_dev_deinit:
2813 enic_dev_deinit(enic);
2814 err_out_dev_close:
2815 vnic_dev_close(enic->vdev);
2816 err_out_vnic_unregister:
2817 vnic_dev_unregister(enic->vdev);
2818 err_out_iounmap:
2819 enic_iounmap(enic);
2820 err_out_release_regions:
2821 pci_release_regions(pdev);
2822 err_out_disable_device:
2823 pci_disable_device(pdev);
2824 err_out_free_netdev:
2825 pci_set_drvdata(pdev, NULL);
2826 free_netdev(netdev);
2827
2828 return err;
2829 }
2830
2831 static void __devexit enic_remove(struct pci_dev *pdev)
2832 {
2833 struct net_device *netdev = pci_get_drvdata(pdev);
2834
2835 if (netdev) {
2836 struct enic *enic = netdev_priv(netdev);
2837
2838 cancel_work_sync(&enic->reset);
2839 unregister_netdev(netdev);
2840 enic_dev_deinit(enic);
2841 vnic_dev_close(enic->vdev);
2842 vnic_dev_unregister(enic->vdev);
2843 enic_iounmap(enic);
2844 pci_release_regions(pdev);
2845 pci_disable_device(pdev);
2846 pci_set_drvdata(pdev, NULL);
2847 free_netdev(netdev);
2848 }
2849 }
2850
2851 static struct pci_driver enic_driver = {
2852 .name = DRV_NAME,
2853 .id_table = enic_id_table,
2854 .probe = enic_probe,
2855 .remove = __devexit_p(enic_remove),
2856 };
2857
2858 static int __init enic_init_module(void)
2859 {
2860 pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2861
2862 return pci_register_driver(&enic_driver);
2863 }
2864
2865 static void __exit enic_cleanup_module(void)
2866 {
2867 pci_unregister_driver(&enic_driver);
2868 }
2869
2870 module_init(enic_init_module);
2871 module_exit(enic_cleanup_module);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree