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enic: Add ndo_set_rx_mode support for enic vnics
[deliverable/linux.git] / drivers / net / enic / enic_main.c
CommitLineData
01f2e4ea 1/*
29046f9b 2 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
01f2e4ea
SF		 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>
29046f9b 37#include <linux/rtnetlink.h>
b7c6bfb7 38#include <net/ip6_checksum.h>
01f2e4ea
SF		 39
40#include "cq_enet_desc.h"
41#include "vnic_dev.h"
42#include "vnic_intr.h"
43#include "vnic_stats.h"
f8bd9091 44#include "vnic_vic.h"
01f2e4ea
SF		 45#include "enic_res.h"
46#include "enic.h"
47
48#define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
ea0d7d91
SF		 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 */
f8bd9091 54#define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */
01f2e4ea
SF		 55
56/* Supported devices */
a3aa1884 57static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
ea0d7d91 58 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
f8bd9091 59 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
01f2e4ea
SF		 60 { 0, } /* end of table */
61};
62
63MODULE_DESCRIPTION(DRV_DESCRIPTION);
64MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
65MODULE_LICENSE("GPL");
66MODULE_VERSION(DRV_VERSION);
67MODULE_DEVICE_TABLE(pci, enic_id_table);
68
69struct 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
79static 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
93static 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
117static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
118static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
119
f8bd9091
SF		 120static int enic_is_dynamic(struct enic *enic)
121{
122 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
123}
124
717258ba
VK		 125static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
126{
127 return rq;
128}
129
130static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
131{
132 return enic->rq_count + wq;
133}
134
135static inline unsigned int enic_legacy_io_intr(void)
136{
137 return 0;
138}
139
140static inline unsigned int enic_legacy_err_intr(void)
141{
142 return 1;
143}
144
145static inline unsigned int enic_legacy_notify_intr(void)
146{
147 return 2;
148}
149
150static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq)
151{
152 return rq;
153}
154
155static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq)
156{
157 return enic->rq_count + wq;
158}
159
160static inline unsigned int enic_msix_err_intr(struct enic *enic)
161{
162 return enic->rq_count + enic->wq_count;
163}
164
165static inline unsigned int enic_msix_notify_intr(struct enic *enic)
166{
167 return enic->rq_count + enic->wq_count + 1;
168}
169
01f2e4ea
SF		 170static 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
383ab92f
VK		 193static 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
01f2e4ea
SF		 205static 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
383ab92f 211 enic_dev_fw_info(enic, &fw_info);
01f2e4ea
SF		 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
221static 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
25f0a061 239static int enic_get_sset_count(struct net_device *netdev, int sset)
01f2e4ea 240{
25f0a061
SF		 241 switch (sset) {
242 case ETH_SS_STATS:
243 return enic_n_tx_stats + enic_n_rx_stats;
244 default:
245 return -EOPNOTSUPP;
246 }
01f2e4ea
SF		 247}
248
383ab92f
VK		 249static 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
01f2e4ea
SF		 260static 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
383ab92f 267 enic_dev_stats_dump(enic, &vstats);
01f2e4ea
SF		 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
275static 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
281static int enic_set_rx_csum(struct net_device *netdev, u32 data)
282{
283 struct enic *enic = netdev_priv(netdev);
284
25f0a061
SF		 285 if (data && !ENIC_SETTING(enic, RXCSUM))
286 return -EINVAL;
287
288 enic->csum_rx_enabled = !!data;
01f2e4ea
SF		 289
290 return 0;
291}
292
293static int enic_set_tx_csum(struct net_device *netdev, u32 data)
294{
295 struct enic *enic = netdev_priv(netdev);
296
25f0a061
SF		 297 if (data && !ENIC_SETTING(enic, TXCSUM))
298 return -EINVAL;
299
300 if (data)
01f2e4ea
SF		 301 netdev->features |= NETIF_F_HW_CSUM;
302 else
303 netdev->features &= ~NETIF_F_HW_CSUM;
304
305 return 0;
306}
307
308static int enic_set_tso(struct net_device *netdev, u32 data)
309{
310 struct enic *enic = netdev_priv(netdev);
311
25f0a061
SF		 312 if (data && !ENIC_SETTING(enic, TSO))
313 return -EINVAL;
314
315 if (data)
01f2e4ea
SF		 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
325static u32 enic_get_msglevel(struct net_device *netdev)
326{
327 struct enic *enic = netdev_priv(netdev);
328 return enic->msg_enable;
329}
330
331static 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
7c844599
SF		 337static 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
348static 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;
717258ba 354 unsigned int i, intr;
7c844599
SF		 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
717258ba
VK		 368 intr = enic_legacy_io_intr();
369 vnic_intr_coalescing_timer_set(&enic->intr[intr],
7c844599
SF		 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:
717258ba
VK		 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
7c844599
SF		 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
0fc0b732 403static const struct ethtool_ops enic_ethtool_ops = {
01f2e4ea
SF		 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,
25f0a061 410 .get_sset_count = enic_get_sset_count,
01f2e4ea
SF		 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,
7c844599
SF		 420 .get_coalesce = enic_get_coalesce,
421 .set_coalesce = enic_set_coalesce,
86ca9db7 422 .get_flags = ethtool_op_get_flags,
01f2e4ea
SF		 423};
424
425static 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
440static 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
446static 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) &&
ea0d7d91
SF		 458 vnic_wq_desc_avail(&enic->wq[q_number]) >=
459 (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
01f2e4ea
SF		 460 netif_wake_queue(enic->netdev);
461
462 spin_unlock(&enic->wq_lock[q_number]);
463
464 return 0;
465}
466
467static 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)
a7a79deb
VK		 475 netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
476 i, error_status);
01f2e4ea
SF		 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)
a7a79deb
VK		 482 netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
483 i, error_status);
01f2e4ea
SF		 484 }
485}
486
383ab92f 487static void enic_msglvl_check(struct enic *enic)
01f2e4ea 488{
383ab92f 489 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
01f2e4ea 490
383ab92f 491 if (msg_enable != enic->msg_enable) {
a7a79deb
VK		 492 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
493 enic->msg_enable, msg_enable);
383ab92f 494 enic->msg_enable = msg_enable;
01f2e4ea
SF		 495 }
496}
497
498static void enic_mtu_check(struct enic *enic)
499{
500 u32 mtu = vnic_dev_mtu(enic->vdev);
a7a79deb 501 struct net_device *netdev = enic->netdev;
01f2e4ea 502
491598a4 503 if (mtu && mtu != enic->port_mtu) {
7c844599 504 enic->port_mtu = mtu;
a7a79deb
VK		 505 if (mtu < netdev->mtu)
506 netdev_warn(netdev,
507 "interface MTU (%d) set higher "
01f2e4ea 508 "than switch port MTU (%d)\n",
a7a79deb 509 netdev->mtu, mtu);
01f2e4ea
SF		 510 }
511}
512
383ab92f 513static void enic_link_check(struct enic *enic)
01f2e4ea 514{
383ab92f
VK		 515 int link_status = vnic_dev_link_status(enic->vdev);
516 int carrier_ok = netif_carrier_ok(enic->netdev);
01f2e4ea 517
383ab92f 518 if (link_status && !carrier_ok) {
a7a79deb 519 netdev_info(enic->netdev, "Link UP\n");
383ab92f
VK		 520 netif_carrier_on(enic->netdev);
521 } else if (!link_status && carrier_ok) {
a7a79deb 522 netdev_info(enic->netdev, "Link DOWN\n");
383ab92f 523 netif_carrier_off(enic->netdev);
01f2e4ea
SF		 524 }
525}
526
527static 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
536static irqreturn_t enic_isr_legacy(int irq, void *data)
537{
538 struct net_device *netdev = data;
539 struct enic *enic = netdev_priv(netdev);
717258ba
VK		 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();
01f2e4ea
SF		 543 u32 pba;
544
717258ba 545 vnic_intr_mask(&enic->intr[io_intr]);
01f2e4ea
SF		 546
547 pba = vnic_intr_legacy_pba(enic->legacy_pba);
548 if (!pba) {
717258ba 549 vnic_intr_unmask(&enic->intr[io_intr]);
01f2e4ea
SF		 550 return IRQ_NONE; /* not our interrupt */
551 }
552
717258ba
VK		 553 if (ENIC_TEST_INTR(pba, notify_intr)) {
554 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
01f2e4ea 555 enic_notify_check(enic);
ed8af6b2 556 }
01f2e4ea 557
717258ba
VK		 558 if (ENIC_TEST_INTR(pba, err_intr)) {
559 vnic_intr_return_all_credits(&enic->intr[err_intr]);
01f2e4ea
SF		 560 enic_log_q_error(enic);
561 /* schedule recovery from WQ/RQ error */
562 schedule_work(&enic->reset);
563 return IRQ_HANDLED;
564 }
565
717258ba
VK		 566 if (ENIC_TEST_INTR(pba, io_intr)) {
567 if (napi_schedule_prep(&enic->napi[0]))
568 __napi_schedule(&enic->napi[0]);
01f2e4ea 569 } else {
717258ba 570 vnic_intr_unmask(&enic->intr[io_intr]);
01f2e4ea
SF		 571 }
572
573 return IRQ_HANDLED;
574}
575
576static 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
717258ba 596 napi_schedule(&enic->napi[0]);
01f2e4ea
SF		 597
598 return IRQ_HANDLED;
599}
600
601static irqreturn_t enic_isr_msix_rq(int irq, void *data)
602{
717258ba 603 struct napi_struct *napi = data;
01f2e4ea
SF		 604
605 /* schedule NAPI polling for RQ cleanup */
717258ba 606 napi_schedule(napi);
01f2e4ea
SF		 607
608 return IRQ_HANDLED;
609}
610
611static irqreturn_t enic_isr_msix_wq(int irq, void *data)
612{
613 struct enic *enic = data;
717258ba
VK		 614 unsigned int cq = enic_cq_wq(enic, 0);
615 unsigned int intr = enic_msix_wq_intr(enic, 0);
01f2e4ea
SF		 616 unsigned int wq_work_to_do = -1; /* no limit */
617 unsigned int wq_work_done;
618
717258ba 619 wq_work_done = vnic_cq_service(&enic->cq[cq],
01f2e4ea
SF		 620 wq_work_to_do, enic_wq_service, NULL);
621
717258ba 622 vnic_intr_return_credits(&enic->intr[intr],
01f2e4ea
SF		 623 wq_work_done,
624 1 /* unmask intr */,
625 1 /* reset intr timer */);
626
627 return IRQ_HANDLED;
628}
629
630static irqreturn_t enic_isr_msix_err(int irq, void *data)
631{
632 struct enic *enic = data;
717258ba 633 unsigned int intr = enic_msix_err_intr(enic);
01f2e4ea 634
717258ba 635 vnic_intr_return_all_credits(&enic->intr[intr]);
ed8af6b2 636
01f2e4ea
SF		 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
645static irqreturn_t enic_isr_msix_notify(int irq, void *data)
646{
647 struct enic *enic = data;
717258ba 648 unsigned int intr = enic_msix_notify_intr(enic);
01f2e4ea 649
717258ba 650 vnic_intr_return_all_credits(&enic->intr[intr]);
01f2e4ea 651 enic_notify_check(enic);
01f2e4ea
SF		 652
653 return IRQ_HANDLED;
654}
655
656static inline void enic_queue_wq_skb_cont(struct enic *enic,
657 struct vnic_wq *wq, struct sk_buff *skb,
1825aca6 658 unsigned int len_left, int loopback)
01f2e4ea
SF		 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,
1825aca6
VK		 670 (len_left == 0), /* EOP? */
671 loopback);
01f2e4ea
SF		 672 }
673}
674
675static inline void enic_queue_wq_skb_vlan(struct enic *enic,
676 struct vnic_wq *wq, struct sk_buff *skb,
1825aca6 677 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
01f2e4ea
SF		 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
ea0d7d91
SF		 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 */
01f2e4ea
SF		 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,
1825aca6 693 eop, loopback);
01f2e4ea
SF		 694
695 if (!eop)
1825aca6 696 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
01f2e4ea
SF		 697}
698
699static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
700 struct vnic_wq *wq, struct sk_buff *skb,
1825aca6 701 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
01f2e4ea
SF		 702{
703 unsigned int head_len = skb_headlen(skb);
704 unsigned int len_left = skb->len - head_len;
705 unsigned int hdr_len = skb_transport_offset(skb);
706 unsigned int csum_offset = hdr_len + skb->csum_offset;
707 int eop = (len_left == 0);
708
ea0d7d91
SF		 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 */
01f2e4ea
SF		 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,
1825aca6 721 eop, loopback);
01f2e4ea
SF		 722
723 if (!eop)
1825aca6 724 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
01f2e4ea
SF		 725}
726
727static inline void enic_queue_wq_skb_tso(struct enic *enic,
728 struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
1825aca6 729 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
01f2e4ea 730{
ea0d7d91
SF		 731 unsigned int frag_len_left = skb_headlen(skb);
732 unsigned int len_left = skb->len - frag_len_left;
01f2e4ea
SF		 733 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
734 int eop = (len_left == 0);
ea0d7d91
SF		 735 unsigned int len;
736 dma_addr_t dma_addr;
737 unsigned int offset = 0;
738 skb_frag_t *frag;
01f2e4ea
SF		 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
09640e63 745 if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
01f2e4ea
SF		 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);
09640e63 749 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
01f2e4ea
SF		 750 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
751 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
752 }
753
ea0d7d91
SF		 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,
1825aca6 766 eop && (len == frag_len_left), loopback);
ea0d7d91
SF		 767 frag_len_left -= len;
768 offset += len;
769 }
01f2e4ea 770
ea0d7d91
SF		 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) &&
1825aca6
VK		 792 (len == frag_len_left), /* EOP? */
793 loopback);
ea0d7d91
SF		 794 frag_len_left -= len;
795 offset += len;
796 }
797 }
01f2e4ea
SF		 798}
799
800static 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;
1825aca6 806 int loopback = 0;
01f2e4ea 807
eab6d18d 808 if (vlan_tx_tag_present(skb)) {
01f2e4ea
SF		 809 /* VLAN tag from trunking driver */
810 vlan_tag_insert = 1;
811 vlan_tag = vlan_tx_tag_get(skb);
1825aca6
VK		 812 } else if (enic->loop_enable) {
813 vlan_tag = enic->loop_tag;
814 loopback = 1;
01f2e4ea
SF		 815 }
816
817 if (mss)
818 enic_queue_wq_skb_tso(enic, wq, skb, mss,
1825aca6 819 vlan_tag_insert, vlan_tag, loopback);
01f2e4ea
SF		 820 else if (skb->ip_summed == CHECKSUM_PARTIAL)
821 enic_queue_wq_skb_csum_l4(enic, wq, skb,
1825aca6 822 vlan_tag_insert, vlan_tag, loopback);
01f2e4ea
SF		 823 else
824 enic_queue_wq_skb_vlan(enic, wq, skb,
1825aca6 825 vlan_tag_insert, vlan_tag, loopback);
01f2e4ea
SF		 826}
827
ed8af6b2 828/* netif_tx_lock held, process context with BHs disabled, or BH */
61357325 829static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
d87fd25d 830 struct net_device *netdev)
01f2e4ea
SF		 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
ea0d7d91
SF		 855 if (vnic_wq_desc_avail(wq) <
856 skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
01f2e4ea
SF		 857 netif_stop_queue(netdev);
858 /* This is a hard error, log it */
a7a79deb 859 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
01f2e4ea
SF		 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
ea0d7d91 866 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
01f2e4ea
SF		 867 netif_stop_queue(netdev);
868
01f2e4ea
SF		 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 */
875static struct net_device_stats *enic_get_stats(struct net_device *netdev)
876{
877 struct enic *enic = netdev_priv(netdev);
25f0a061 878 struct net_device_stats *net_stats = &netdev->stats;
01f2e4ea
SF		 879 struct vnic_stats *stats;
880
383ab92f 881 enic_dev_stats_dump(enic, &stats);
01f2e4ea 882
25f0a061
SF		 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;
01f2e4ea 887
25f0a061
SF		 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;
350991e1 892 net_stats->rx_over_errors = enic->rq_truncated_pkts;
bd9fb1a4 893 net_stats->rx_crc_errors = enic->rq_bad_fcs;
350991e1 894 net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
01f2e4ea 895
25f0a061 896 return net_stats;
01f2e4ea
SF		 897}
898
99ef5639 899static void enic_reset_multicast_list(struct enic *enic)
01f2e4ea
SF		 900{
901 enic->mc_count = 0;
99ef5639 902 enic->flags = 0;
01f2e4ea
SF		 903}
904
905static int enic_set_mac_addr(struct net_device *netdev, char *addr)
906{
f8bd9091
SF		 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 }
01f2e4ea
SF		 916
917 memcpy(netdev->dev_addr, addr, netdev->addr_len);
918
919 return 0;
920}
921
f8bd9091
SF		 922static 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
935static 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
948static 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
974static int enic_set_mac_address(struct net_device *netdev, void *p)
975{
294dab25 976 struct sockaddr *saddr = p;
c76fd32d
VK		 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;
294dab25 988
c76fd32d 989 return enic_dev_add_station_addr(enic);
f8bd9091
SF		 990}
991
383ab92f
VK		 992static 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
319d7e84 1005static int enic_dev_add_addr(struct enic *enic, u8 *addr)
383ab92f
VK		 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
319d7e84 1016static int enic_dev_del_addr(struct enic *enic, u8 *addr)
383ab92f
VK		 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
319d7e84 1027static void enic_add_multicast_addr_list(struct enic *enic)
01f2e4ea 1028{
319d7e84 1029 struct net_device *netdev = enic->netdev;
22bedad3 1030 struct netdev_hw_addr *ha;
4cd24eaf 1031 unsigned int mc_count = netdev_mc_count(netdev);
01f2e4ea 1032 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
01f2e4ea
SF		 1033 unsigned int i, j;
1034
319d7e84
RP		 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);
01f2e4ea 1039 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
9959a185 1040 }
01f2e4ea
SF		 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
48e2f183 1048 i = 0;
22bedad3 1049 netdev_for_each_mc_addr(ha, netdev) {
48e2f183
JP		 1050 if (i == mc_count)
1051 break;
22bedad3 1052 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
01f2e4ea
SF		 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)
319d7e84 1061 enic_dev_del_addr(enic, enic->mc_addr[i]);
01f2e4ea
SF		 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)
319d7e84 1070 enic_dev_add_addr(enic, mc_addr[i]);
01f2e4ea
SF		 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;
01f2e4ea
SF		 1080}
1081
319d7e84
RP		 1082static 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 */
1138static 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
01f2e4ea
SF		 1165/* rtnl lock is held */
1166static 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 */
1174static 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 */
1184static 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 */
1194static void enic_tx_timeout(struct net_device *netdev)
1195{
1196 struct enic *enic = netdev_priv(netdev);
1197 schedule_work(&enic->reset);
1198}
1199
f8bd9091
SF		 1200static 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
1211static 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
1223static 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
08f382eb 1234static int enic_set_port_profile(struct enic *enic, u8 *mac)
f8bd9091
SF		 1235{
1236 struct vic_provinfo *vp;
1237 u8 oui[3] = VIC_PROVINFO_CISCO_OUI;
f8bd9091 1238 char uuid_str[38];
f8bd9091
SF		 1239 int err;
1240
08f382eb
SF		 1241 err = enic_vnic_dev_deinit(enic);
1242 if (err)
1243 return err;
f8bd9091 1244
08f382eb 1245 switch (enic->pp.request) {
f8bd9091 1246
08f382eb 1247 case PORT_REQUEST_ASSOCIATE:
f8bd9091 1248
08f382eb
SF		 1249 if (!(enic->pp.set & ENIC_SET_NAME) || !strlen(enic->pp.name))
1250 return -EINVAL;
f8bd9091 1251
08f382eb
SF		 1252 if (!is_valid_ether_addr(mac))
1253 return -EADDRNOTAVAIL;
f8bd9091 1254
08f382eb
SF		 1255 vp = vic_provinfo_alloc(GFP_KERNEL, oui,
1256 VIC_PROVINFO_LINUX_TYPE);
1257 if (!vp)
1258 return -ENOMEM;
f8bd9091 1259
f8bd9091 1260 vic_provinfo_add_tlv(vp,
08f382eb
SF		 1261 VIC_LINUX_PROV_TLV_PORT_PROFILE_NAME_STR,
1262 strlen(enic->pp.name) + 1, enic->pp.name);
f8bd9091 1263
08f382eb
SF		 1264 vic_provinfo_add_tlv(vp,
1265 VIC_LINUX_PROV_TLV_CLIENT_MAC_ADDR,
1266 ETH_ALEN, mac);
1267
1268 if (enic->pp.set & ENIC_SET_INSTANCE) {
c33788b4 1269 sprintf(uuid_str, "%pUB", enic->pp.instance_uuid);
08f382eb
SF		 1270 vic_provinfo_add_tlv(vp,
1271 VIC_LINUX_PROV_TLV_CLIENT_UUID_STR,
1272 sizeof(uuid_str), uuid_str);
1273 }
f8bd9091 1274
08f382eb 1275 if (enic->pp.set & ENIC_SET_HOST) {
c33788b4 1276 sprintf(uuid_str, "%pUB", enic->pp.host_uuid);
08f382eb
SF		 1277 vic_provinfo_add_tlv(vp,
1278 VIC_LINUX_PROV_TLV_HOST_UUID_STR,
1279 sizeof(uuid_str), uuid_str);
1280 }
f8bd9091 1281
08f382eb
SF		 1282 err = enic_dev_init_prov(enic, vp);
1283 vic_provinfo_free(vp);
1284 if (err)
1285 return err;
1286 break;
f8bd9091 1287
08f382eb
SF		 1288 case PORT_REQUEST_DISASSOCIATE:
1289 break;
f8bd9091 1290
08f382eb
SF		 1291 default:
1292 return -EINVAL;
1293 }
f8bd9091 1294
08f382eb
SF		 1295 enic->pp.set |= ENIC_SET_APPLIED;
1296 return 0;
f8bd9091
SF		 1297}
1298
1299static int enic_set_vf_port(struct net_device *netdev, int vf,
1300 struct nlattr *port[])
1301{
1302 struct enic *enic = netdev_priv(netdev);
08f382eb
SF		 1303
1304 memset(&enic->pp, 0, sizeof(enic->pp));
1305
1306 if (port[IFLA_PORT_REQUEST]) {
1307 enic->pp.set |= ENIC_SET_REQUEST;
1308 enic->pp.request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1309 }
1310
1311 if (port[IFLA_PORT_PROFILE]) {
1312 enic->pp.set |= ENIC_SET_NAME;
1313 memcpy(enic->pp.name, nla_data(port[IFLA_PORT_PROFILE]),
1314 PORT_PROFILE_MAX);
1315 }
1316
1317 if (port[IFLA_PORT_INSTANCE_UUID]) {
1318 enic->pp.set |= ENIC_SET_INSTANCE;
1319 memcpy(enic->pp.instance_uuid,
1320 nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1321 }
1322
1323 if (port[IFLA_PORT_HOST_UUID]) {
1324 enic->pp.set |= ENIC_SET_HOST;
1325 memcpy(enic->pp.host_uuid,
1326 nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1327 }
f8bd9091
SF		 1328
1329 /* don't support VFs, yet */
1330 if (vf != PORT_SELF_VF)
1331 return -EOPNOTSUPP;
1332
08f382eb
SF		 1333 if (!(enic->pp.set & ENIC_SET_REQUEST))
1334 return -EOPNOTSUPP;
f8bd9091 1335
08f382eb 1336 if (enic->pp.request == PORT_REQUEST_ASSOCIATE) {
f8bd9091 1337
418c437d
SF		 1338 /* If the interface mac addr hasn't been assigned,
1339 * assign a random mac addr before setting port-
1340 * profile.
1341 */
1342
1343 if (is_zero_ether_addr(netdev->dev_addr))
1344 random_ether_addr(netdev->dev_addr);
f8bd9091
SF		 1345 }
1346
08f382eb 1347 return enic_set_port_profile(enic, netdev->dev_addr);
f8bd9091
SF		 1348}
1349
1350static int enic_get_vf_port(struct net_device *netdev, int vf,
1351 struct sk_buff *skb)
1352{
1353 struct enic *enic = netdev_priv(netdev);
1354 int err, error, done;
1355 u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1356
08f382eb
SF		 1357 if (!(enic->pp.set & ENIC_SET_APPLIED))
1358 return -ENODATA;
f8bd9091
SF		 1359
1360 err = enic_dev_init_done(enic, &done, &error);
f8bd9091 1361 if (err)
08f382eb 1362 error = err;
f8bd9091
SF		 1363
1364 switch (error) {
1365 case ERR_SUCCESS:
1366 if (!done)
1367 response = PORT_PROFILE_RESPONSE_INPROGRESS;
1368 break;
1369 case ERR_EINVAL:
1370 response = PORT_PROFILE_RESPONSE_INVALID;
1371 break;
1372 case ERR_EBADSTATE:
1373 response = PORT_PROFILE_RESPONSE_BADSTATE;
1374 break;
1375 case ERR_ENOMEM:
1376 response = PORT_PROFILE_RESPONSE_INSUFFICIENT_RESOURCES;
1377 break;
1378 default:
1379 response = PORT_PROFILE_RESPONSE_ERROR;
1380 break;
1381 }
1382
1383 NLA_PUT_U16(skb, IFLA_PORT_REQUEST, enic->pp.request);
1384 NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
08f382eb
SF		 1385 if (enic->pp.set & ENIC_SET_NAME)
1386 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
1387 enic->pp.name);
1388 if (enic->pp.set & ENIC_SET_INSTANCE)
1389 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1390 enic->pp.instance_uuid);
1391 if (enic->pp.set & ENIC_SET_HOST)
1392 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
1393 enic->pp.host_uuid);
f8bd9091
SF		 1394
1395 return 0;
1396
1397nla_put_failure:
1398 return -EMSGSIZE;
1399}
1400
01f2e4ea
SF		 1401static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1402{
1403 struct enic *enic = vnic_dev_priv(rq->vdev);
1404
1405 if (!buf->os_buf)
1406 return;
1407
1408 pci_unmap_single(enic->pdev, buf->dma_addr,
1409 buf->len, PCI_DMA_FROMDEVICE);
1410 dev_kfree_skb_any(buf->os_buf);
1411}
1412
01f2e4ea
SF		 1413static int enic_rq_alloc_buf(struct vnic_rq *rq)
1414{
1415 struct enic *enic = vnic_dev_priv(rq->vdev);
d19e22dc 1416 struct net_device *netdev = enic->netdev;
01f2e4ea 1417 struct sk_buff *skb;
1825aca6 1418 unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
01f2e4ea
SF		 1419 unsigned int os_buf_index = 0;
1420 dma_addr_t dma_addr;
1421
89d71a66 1422 skb = netdev_alloc_skb_ip_align(netdev, len);
01f2e4ea
SF		 1423 if (!skb)
1424 return -ENOMEM;
1425
1426 dma_addr = pci_map_single(enic->pdev, skb->data,
1427 len, PCI_DMA_FROMDEVICE);
1428
1429 enic_queue_rq_desc(rq, skb, os_buf_index,
1430 dma_addr, len);
1431
1432 return 0;
1433}
1434
4badc385
SF		 1435static int enic_rq_alloc_buf_a1(struct vnic_rq *rq)
1436{
1437 struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
1438
1439 if (vnic_rq_posting_soon(rq)) {
1440
1441 /* SW workaround for A0 HW erratum: if we're just about
1442 * to write posted_index, insert a dummy desc
1443 * of type resvd
1444 */
1445
1446 rq_enet_desc_enc(desc, 0, RQ_ENET_TYPE_RESV2, 0);
1447 vnic_rq_post(rq, 0, 0, 0, 0);
1448 } else {
1449 return enic_rq_alloc_buf(rq);
1450 }
1451
1452 return 0;
1453}
1454
383ab92f
VK		 1455static int enic_dev_hw_version(struct enic *enic,
1456 enum vnic_dev_hw_version *hw_ver)
1457{
1458 int err;
1459
1460 spin_lock(&enic->devcmd_lock);
1461 err = vnic_dev_hw_version(enic->vdev, hw_ver);
1462 spin_unlock(&enic->devcmd_lock);
1463
1464 return err;
1465}
1466
4badc385
SF		 1467static int enic_set_rq_alloc_buf(struct enic *enic)
1468{
1469 enum vnic_dev_hw_version hw_ver;
1470 int err;
1471
383ab92f 1472 err = enic_dev_hw_version(enic, &hw_ver);
4badc385
SF		 1473 if (err)
1474 return err;
1475
1476 switch (hw_ver) {
1477 case VNIC_DEV_HW_VER_A1:
1478 enic->rq_alloc_buf = enic_rq_alloc_buf_a1;
1479 break;
1480 case VNIC_DEV_HW_VER_A2:
1481 case VNIC_DEV_HW_VER_UNKNOWN:
1482 enic->rq_alloc_buf = enic_rq_alloc_buf;
1483 break;
1484 default:
1485 return -ENODEV;
1486 }
1487
1488 return 0;
1489}
1490
01f2e4ea
SF		 1491static void enic_rq_indicate_buf(struct vnic_rq *rq,
1492 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1493 int skipped, void *opaque)
1494{
1495 struct enic *enic = vnic_dev_priv(rq->vdev);
86ca9db7 1496 struct net_device *netdev = enic->netdev;
01f2e4ea
SF		 1497 struct sk_buff *skb;
1498
1499 u8 type, color, eop, sop, ingress_port, vlan_stripped;
1500 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1501 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1502 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1503 u8 packet_error;
f8cac14a 1504 u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
01f2e4ea
SF		 1505 u32 rss_hash;
1506
1507 if (skipped)
1508 return;
1509
1510 skb = buf->os_buf;
1511 prefetch(skb->data - NET_IP_ALIGN);
1512 pci_unmap_single(enic->pdev, buf->dma_addr,
1513 buf->len, PCI_DMA_FROMDEVICE);
1514
1515 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1516 &type, &color, &q_number, &completed_index,
1517 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1518 &csum_not_calc, &rss_hash, &bytes_written,
f8cac14a 1519 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
01f2e4ea
SF		 1520 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1521 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1522 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1523 &fcs_ok);
1524
1525 if (packet_error) {
1526
350991e1
SF		 1527 if (!fcs_ok) {
1528 if (bytes_written > 0)
1529 enic->rq_bad_fcs++;
1530 else if (bytes_written == 0)
1531 enic->rq_truncated_pkts++;
1532 }
01f2e4ea
SF		 1533
1534 dev_kfree_skb_any(skb);
1535
1536 return;
1537 }
1538
1539 if (eop && bytes_written > 0) {
1540
1541 /* Good receive
1542 */
1543
1544 skb_put(skb, bytes_written);
86ca9db7 1545 skb->protocol = eth_type_trans(skb, netdev);
01f2e4ea
SF		 1546
1547 if (enic->csum_rx_enabled && !csum_not_calc) {
1548 skb->csum = htons(checksum);
1549 skb->ip_summed = CHECKSUM_COMPLETE;
1550 }
1551
86ca9db7 1552 skb->dev = netdev;
01f2e4ea 1553
f8cac14a
VK		 1554 if (enic->vlan_group && vlan_stripped &&
1555 (vlan_tci & CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_MASK)) {
01f2e4ea 1556
88132f55 1557 if (netdev->features & NETIF_F_GRO)
717258ba
VK		 1558 vlan_gro_receive(&enic->napi[q_number],
1559 enic->vlan_group, vlan_tci, skb);
01f2e4ea
SF		 1560 else
1561 vlan_hwaccel_receive_skb(skb,
f8cac14a 1562 enic->vlan_group, vlan_tci);
01f2e4ea
SF		 1563
1564 } else {
1565
88132f55 1566 if (netdev->features & NETIF_F_GRO)
717258ba 1567 napi_gro_receive(&enic->napi[q_number], skb);
01f2e4ea
SF		 1568 else
1569 netif_receive_skb(skb);
1570
1571 }
01f2e4ea
SF		 1572 } else {
1573
1574 /* Buffer overflow
1575 */
1576
1577 dev_kfree_skb_any(skb);
1578 }
1579}
1580
1581static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1582 u8 type, u16 q_number, u16 completed_index, void *opaque)
1583{
1584 struct enic *enic = vnic_dev_priv(vdev);
1585
1586 vnic_rq_service(&enic->rq[q_number], cq_desc,
1587 completed_index, VNIC_RQ_RETURN_DESC,
1588 enic_rq_indicate_buf, opaque);
1589
1590 return 0;
1591}
1592
01f2e4ea
SF		 1593static int enic_poll(struct napi_struct *napi, int budget)
1594{
717258ba
VK		 1595 struct net_device *netdev = napi->dev;
1596 struct enic *enic = netdev_priv(netdev);
1597 unsigned int cq_rq = enic_cq_rq(enic, 0);
1598 unsigned int cq_wq = enic_cq_wq(enic, 0);
1599 unsigned int intr = enic_legacy_io_intr();
01f2e4ea
SF		 1600 unsigned int rq_work_to_do = budget;
1601 unsigned int wq_work_to_do = -1; /* no limit */
1602 unsigned int work_done, rq_work_done, wq_work_done;
2d6ddced 1603 int err;
01f2e4ea
SF		 1604
1605 /* Service RQ (first) and WQ
1606 */
1607
717258ba 1608 rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
01f2e4ea
SF		 1609 rq_work_to_do, enic_rq_service, NULL);
1610
717258ba 1611 wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
01f2e4ea
SF		 1612 wq_work_to_do, enic_wq_service, NULL);
1613
1614 /* Accumulate intr event credits for this polling
1615 * cycle. An intr event is the completion of a
1616 * a WQ or RQ packet.
1617 */
1618
1619 work_done = rq_work_done + wq_work_done;
1620
1621 if (work_done > 0)
717258ba 1622 vnic_intr_return_credits(&enic->intr[intr],
01f2e4ea
SF		 1623 work_done,
1624 0 /* don't unmask intr */,
1625 0 /* don't reset intr timer */);
1626
2d6ddced 1627 err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
01f2e4ea 1628
2d6ddced
SF		 1629 /* Buffer allocation failed. Stay in polling
1630 * mode so we can try to fill the ring again.
1631 */
01f2e4ea 1632
2d6ddced
SF		 1633 if (err)
1634 rq_work_done = rq_work_to_do;
01f2e4ea 1635
2d6ddced 1636 if (rq_work_done < rq_work_to_do) {
01f2e4ea 1637
2d6ddced 1638 /* Some work done, but not enough to stay in polling,
88132f55 1639 * exit polling
01f2e4ea
SF		 1640 */
1641
288379f0 1642 napi_complete(napi);
717258ba 1643 vnic_intr_unmask(&enic->intr[intr]);
01f2e4ea
SF		 1644 }
1645
1646 return rq_work_done;
1647}
1648
1649static int enic_poll_msix(struct napi_struct *napi, int budget)
1650{
717258ba
VK		 1651 struct net_device *netdev = napi->dev;
1652 struct enic *enic = netdev_priv(netdev);
1653 unsigned int rq = (napi - &enic->napi[0]);
1654 unsigned int cq = enic_cq_rq(enic, rq);
1655 unsigned int intr = enic_msix_rq_intr(enic, rq);
01f2e4ea
SF		 1656 unsigned int work_to_do = budget;
1657 unsigned int work_done;
2d6ddced 1658 int err;
01f2e4ea
SF		 1659
1660 /* Service RQ
1661 */
1662
717258ba 1663 work_done = vnic_cq_service(&enic->cq[cq],
01f2e4ea
SF		 1664 work_to_do, enic_rq_service, NULL);
1665
2d6ddced
SF		 1666 /* Return intr event credits for this polling
1667 * cycle. An intr event is the completion of a
1668 * RQ packet.
1669 */
01f2e4ea 1670
2d6ddced 1671 if (work_done > 0)
717258ba 1672 vnic_intr_return_credits(&enic->intr[intr],
01f2e4ea
SF		 1673 work_done,
1674 0 /* don't unmask intr */,
1675 0 /* don't reset intr timer */);
01f2e4ea 1676
717258ba 1677 err = vnic_rq_fill(&enic->rq[rq], enic->rq_alloc_buf);
2d6ddced
SF		 1678
1679 /* Buffer allocation failed. Stay in polling mode
1680 * so we can try to fill the ring again.
1681 */
1682
1683 if (err)
1684 work_done = work_to_do;
1685
1686 if (work_done < work_to_do) {
1687
1688 /* Some work done, but not enough to stay in polling,
88132f55 1689 * exit polling
01f2e4ea
SF		 1690 */
1691
288379f0 1692 napi_complete(napi);
717258ba 1693 vnic_intr_unmask(&enic->intr[intr]);
01f2e4ea
SF		 1694 }
1695
1696 return work_done;
1697}
1698
1699static void enic_notify_timer(unsigned long data)
1700{
1701 struct enic *enic = (struct enic *)data;
1702
1703 enic_notify_check(enic);
1704
25f0a061
SF		 1705 mod_timer(&enic->notify_timer,
1706 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
01f2e4ea
SF		 1707}
1708
1709static void enic_free_intr(struct enic *enic)
1710{
1711 struct net_device *netdev = enic->netdev;
1712 unsigned int i;
1713
1714 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1715 case VNIC_DEV_INTR_MODE_INTX:
01f2e4ea
SF		 1716 free_irq(enic->pdev->irq, netdev);
1717 break;
8f4d248c
SF		 1718 case VNIC_DEV_INTR_MODE_MSI:
1719 free_irq(enic->pdev->irq, enic);
1720 break;
01f2e4ea
SF		 1721 case VNIC_DEV_INTR_MODE_MSIX:
1722 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1723 if (enic->msix[i].requested)
1724 free_irq(enic->msix_entry[i].vector,
1725 enic->msix[i].devid);
1726 break;
1727 default:
1728 break;
1729 }
1730}
1731
1732static int enic_request_intr(struct enic *enic)
1733{
1734 struct net_device *netdev = enic->netdev;
717258ba 1735 unsigned int i, intr;
01f2e4ea
SF		 1736 int err = 0;
1737
1738 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1739
1740 case VNIC_DEV_INTR_MODE_INTX:
1741
1742 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1743 IRQF_SHARED, netdev->name, netdev);
1744 break;
1745
1746 case VNIC_DEV_INTR_MODE_MSI:
1747
1748 err = request_irq(enic->pdev->irq, enic_isr_msi,
1749 0, netdev->name, enic);
1750 break;
1751
1752 case VNIC_DEV_INTR_MODE_MSIX:
1753
717258ba
VK		 1754 for (i = 0; i < enic->rq_count; i++) {
1755 intr = enic_msix_rq_intr(enic, i);
1756 sprintf(enic->msix[intr].devname,
1757 "%.11s-rx-%d", netdev->name, i);
1758 enic->msix[intr].isr = enic_isr_msix_rq;
1759 enic->msix[intr].devid = &enic->napi[i];
1760 }
01f2e4ea 1761
717258ba
VK		 1762 for (i = 0; i < enic->wq_count; i++) {
1763 intr = enic_msix_wq_intr(enic, i);
1764 sprintf(enic->msix[intr].devname,
1765 "%.11s-tx-%d", netdev->name, i);
1766 enic->msix[intr].isr = enic_isr_msix_wq;
1767 enic->msix[intr].devid = enic;
1768 }
01f2e4ea 1769
717258ba
VK		 1770 intr = enic_msix_err_intr(enic);
1771 sprintf(enic->msix[intr].devname,
01f2e4ea 1772 "%.11s-err", netdev->name);
717258ba
VK		 1773 enic->msix[intr].isr = enic_isr_msix_err;
1774 enic->msix[intr].devid = enic;
01f2e4ea 1775
717258ba
VK		 1776 intr = enic_msix_notify_intr(enic);
1777 sprintf(enic->msix[intr].devname,
01f2e4ea 1778 "%.11s-notify", netdev->name);
717258ba
VK		 1779 enic->msix[intr].isr = enic_isr_msix_notify;
1780 enic->msix[intr].devid = enic;
1781
1782 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1783 enic->msix[i].requested = 0;
01f2e4ea 1784
717258ba 1785 for (i = 0; i < enic->intr_count; i++) {
01f2e4ea
SF		 1786 err = request_irq(enic->msix_entry[i].vector,
1787 enic->msix[i].isr, 0,
1788 enic->msix[i].devname,
1789 enic->msix[i].devid);
1790 if (err) {
1791 enic_free_intr(enic);
1792 break;
1793 }
1794 enic->msix[i].requested = 1;
1795 }
1796
1797 break;
1798
1799 default:
1800 break;
1801 }
1802
1803 return err;
1804}
1805
b3d18d19
SF		 1806static void enic_synchronize_irqs(struct enic *enic)
1807{
1808 unsigned int i;
1809
1810 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1811 case VNIC_DEV_INTR_MODE_INTX:
1812 case VNIC_DEV_INTR_MODE_MSI:
1813 synchronize_irq(enic->pdev->irq);
1814 break;
1815 case VNIC_DEV_INTR_MODE_MSIX:
1816 for (i = 0; i < enic->intr_count; i++)
1817 synchronize_irq(enic->msix_entry[i].vector);
1818 break;
1819 default:
1820 break;
1821 }
1822}
1823
383ab92f 1824static int enic_dev_notify_set(struct enic *enic)
01f2e4ea
SF		 1825{
1826 int err;
1827
56ac88b3 1828 spin_lock(&enic->devcmd_lock);
01f2e4ea
SF		 1829 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1830 case VNIC_DEV_INTR_MODE_INTX:
717258ba
VK		 1831 err = vnic_dev_notify_set(enic->vdev,
1832 enic_legacy_notify_intr());
01f2e4ea
SF		 1833 break;
1834 case VNIC_DEV_INTR_MODE_MSIX:
717258ba
VK		 1835 err = vnic_dev_notify_set(enic->vdev,
1836 enic_msix_notify_intr(enic));
01f2e4ea
SF		 1837 break;
1838 default:
1839 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1840 break;
1841 }
56ac88b3 1842 spin_unlock(&enic->devcmd_lock);
01f2e4ea
SF		 1843
1844 return err;
1845}
1846
383ab92f
VK		 1847static int enic_dev_notify_unset(struct enic *enic)
1848{
1849 int err;
1850
1851 spin_lock(&enic->devcmd_lock);
1852 err = vnic_dev_notify_unset(enic->vdev);
1853 spin_unlock(&enic->devcmd_lock);
1854
1855 return err;
1856}
1857
1858static int enic_dev_enable(struct enic *enic)
1859{
1860 int err;
1861
1862 spin_lock(&enic->devcmd_lock);
2db77e0f 1863 err = vnic_dev_enable_wait(enic->vdev);
383ab92f
VK		 1864 spin_unlock(&enic->devcmd_lock);
1865
1866 return err;
1867}
1868
1869static int enic_dev_disable(struct enic *enic)
1870{
1871 int err;
1872
1873 spin_lock(&enic->devcmd_lock);
1874 err = vnic_dev_disable(enic->vdev);
1875 spin_unlock(&enic->devcmd_lock);
1876
1877 return err;
1878}
1879
01f2e4ea
SF		 1880static void enic_notify_timer_start(struct enic *enic)
1881{
1882 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1883 case VNIC_DEV_INTR_MODE_MSI:
1884 mod_timer(&enic->notify_timer, jiffies);
1885 break;
1886 default:
1887 /* Using intr for notification for INTx/MSI-X */
1888 break;
1889 };
1890}
1891
1892/* rtnl lock is held, process context */
1893static int enic_open(struct net_device *netdev)
1894{
1895 struct enic *enic = netdev_priv(netdev);
1896 unsigned int i;
1897 int err;
1898
4b75a442
SF		 1899 err = enic_request_intr(enic);
1900 if (err) {
a7a79deb 1901 netdev_err(netdev, "Unable to request irq.\n");
4b75a442
SF		 1902 return err;
1903 }
1904
383ab92f 1905 err = enic_dev_notify_set(enic);
4b75a442 1906 if (err) {
a7a79deb
VK		 1907 netdev_err(netdev,
1908 "Failed to alloc notify buffer, aborting.\n");
4b75a442
SF		 1909 goto err_out_free_intr;
1910 }
1911
01f2e4ea 1912 for (i = 0; i < enic->rq_count; i++) {
2d6ddced
SF		 1913 vnic_rq_fill(&enic->rq[i], enic->rq_alloc_buf);
1914 /* Need at least one buffer on ring to get going */
1915 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
a7a79deb 1916 netdev_err(netdev, "Unable to alloc receive buffers\n");
2d6ddced 1917 err = -ENOMEM;
4b75a442 1918 goto err_out_notify_unset;
01f2e4ea
SF		 1919 }
1920 }
1921
1922 for (i = 0; i < enic->wq_count; i++)
1923 vnic_wq_enable(&enic->wq[i]);
1924 for (i = 0; i < enic->rq_count; i++)
1925 vnic_rq_enable(&enic->rq[i]);
1926
f8bd9091 1927 enic_dev_add_station_addr(enic);
319d7e84 1928 enic_set_rx_mode(netdev);
01f2e4ea
SF		 1929
1930 netif_wake_queue(netdev);
717258ba
VK		 1931
1932 for (i = 0; i < enic->rq_count; i++)
1933 napi_enable(&enic->napi[i]);
1934
383ab92f 1935 enic_dev_enable(enic);
01f2e4ea
SF		 1936
1937 for (i = 0; i < enic->intr_count; i++)
1938 vnic_intr_unmask(&enic->intr[i]);
1939
1940 enic_notify_timer_start(enic);
1941
1942 return 0;
4b75a442
SF		 1943
1944err_out_notify_unset:
383ab92f 1945 enic_dev_notify_unset(enic);
4b75a442
SF		 1946err_out_free_intr:
1947 enic_free_intr(enic);
1948
1949 return err;
01f2e4ea
SF		 1950}
1951
1952/* rtnl lock is held, process context */
1953static int enic_stop(struct net_device *netdev)
1954{
1955 struct enic *enic = netdev_priv(netdev);
1956 unsigned int i;
1957 int err;
1958
29046f9b 1959 for (i = 0; i < enic->intr_count; i++) {
b3d18d19 1960 vnic_intr_mask(&enic->intr[i]);
29046f9b
VK		 1961 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1962 }
b3d18d19
SF		 1963
1964 enic_synchronize_irqs(enic);
1965
01f2e4ea
SF		 1966 del_timer_sync(&enic->notify_timer);
1967
383ab92f 1968 enic_dev_disable(enic);
717258ba
VK		 1969
1970 for (i = 0; i < enic->rq_count; i++)
1971 napi_disable(&enic->napi[i]);
1972
b3d18d19
SF		 1973 netif_carrier_off(netdev);
1974 netif_tx_disable(netdev);
f8bd9091
SF		 1975 enic_dev_del_station_addr(enic);
1976
01f2e4ea
SF		 1977 for (i = 0; i < enic->wq_count; i++) {
1978 err = vnic_wq_disable(&enic->wq[i]);
1979 if (err)
1980 return err;
1981 }
1982 for (i = 0; i < enic->rq_count; i++) {
1983 err = vnic_rq_disable(&enic->rq[i]);
1984 if (err)
1985 return err;
1986 }
1987
383ab92f 1988 enic_dev_notify_unset(enic);
4b75a442
SF		 1989 enic_free_intr(enic);
1990
01f2e4ea
SF		 1991 for (i = 0; i < enic->wq_count; i++)
1992 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1993 for (i = 0; i < enic->rq_count; i++)
1994 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1995 for (i = 0; i < enic->cq_count; i++)
1996 vnic_cq_clean(&enic->cq[i]);
1997 for (i = 0; i < enic->intr_count; i++)
1998 vnic_intr_clean(&enic->intr[i]);
1999
2000 return 0;
2001}
2002
2003static int enic_change_mtu(struct net_device *netdev, int new_mtu)
2004{
2005 struct enic *enic = netdev_priv(netdev);
2006 int running = netif_running(netdev);
2007
25f0a061
SF		 2008 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
2009 return -EINVAL;
2010
01f2e4ea
SF		 2011 if (running)
2012 enic_stop(netdev);
2013
01f2e4ea
SF		 2014 netdev->mtu = new_mtu;
2015
2016 if (netdev->mtu > enic->port_mtu)
a7a79deb
VK		 2017 netdev_warn(netdev,
2018 "interface MTU (%d) set higher than port MTU (%d)\n",
2019 netdev->mtu, enic->port_mtu);
01f2e4ea
SF		 2020
2021 if (running)
2022 enic_open(netdev);
2023
2024 return 0;
2025}
2026
2027#ifdef CONFIG_NET_POLL_CONTROLLER
2028static void enic_poll_controller(struct net_device *netdev)
2029{
2030 struct enic *enic = netdev_priv(netdev);
2031 struct vnic_dev *vdev = enic->vdev;
717258ba 2032 unsigned int i, intr;
01f2e4ea
SF		 2033
2034 switch (vnic_dev_get_intr_mode(vdev)) {
2035 case VNIC_DEV_INTR_MODE_MSIX:
717258ba
VK		 2036 for (i = 0; i < enic->rq_count; i++) {
2037 intr = enic_msix_rq_intr(enic, i);
2038 enic_isr_msix_rq(enic->msix_entry[intr].vector, enic);
2039 }
2040 intr = enic_msix_wq_intr(enic, i);
2041 enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
01f2e4ea
SF		 2042 break;
2043 case VNIC_DEV_INTR_MODE_MSI:
2044 enic_isr_msi(enic->pdev->irq, enic);
2045 break;
2046 case VNIC_DEV_INTR_MODE_INTX:
2047 enic_isr_legacy(enic->pdev->irq, netdev);
2048 break;
2049 default:
2050 break;
2051 }
2052}
2053#endif
2054
2055static int enic_dev_wait(struct vnic_dev *vdev,
2056 int (*start)(struct vnic_dev *, int),
2057 int (*finished)(struct vnic_dev *, int *),
2058 int arg)
2059{
2060 unsigned long time;
2061 int done;
2062 int err;
2063
2064 BUG_ON(in_interrupt());
2065
2066 err = start(vdev, arg);
2067 if (err)
2068 return err;
2069
2070 /* Wait for func to complete...2 seconds max
2071 */
2072
2073 time = jiffies + (HZ * 2);
2074 do {
2075
2076 err = finished(vdev, &done);
2077 if (err)
2078 return err;
2079
2080 if (done)
2081 return 0;
2082
2083 schedule_timeout_uninterruptible(HZ / 10);
2084
2085 } while (time_after(time, jiffies));
2086
2087 return -ETIMEDOUT;
2088}
2089
2090static int enic_dev_open(struct enic *enic)
2091{
2092 int err;
2093
2094 err = enic_dev_wait(enic->vdev, vnic_dev_open,
2095 vnic_dev_open_done, 0);
2096 if (err)
a7a79deb
VK		 2097 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
2098 err);
01f2e4ea
SF		 2099
2100 return err;
2101}
2102
99ef5639 2103static int enic_dev_hang_reset(struct enic *enic)
01f2e4ea
SF		 2104{
2105 int err;
2106
99ef5639
VK		 2107 err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
2108 vnic_dev_hang_reset_done, 0);
01f2e4ea 2109 if (err)
a7a79deb
VK		 2110 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
2111 err);
01f2e4ea
SF		 2112
2113 return err;
2114}
2115
717258ba
VK		 2116static int enic_set_rsskey(struct enic *enic)
2117{
1f4f067f 2118 dma_addr_t rss_key_buf_pa;
717258ba
VK		 2119 union vnic_rss_key *rss_key_buf_va = NULL;
2120 union vnic_rss_key rss_key = {
2121 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
2122 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
2123 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
2124 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
2125 };
2126 int err;
2127
2128 rss_key_buf_va = pci_alloc_consistent(enic->pdev,
2129 sizeof(union vnic_rss_key), &rss_key_buf_pa);
2130 if (!rss_key_buf_va)
2131 return -ENOMEM;
2132
2133 memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
2134
2135 spin_lock(&enic->devcmd_lock);
2136 err = enic_set_rss_key(enic,
2137 rss_key_buf_pa,
2138 sizeof(union vnic_rss_key));
2139 spin_unlock(&enic->devcmd_lock);
2140
2141 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
2142 rss_key_buf_va, rss_key_buf_pa);
2143
2144 return err;
2145}
2146
2147static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
2148{
1f4f067f 2149 dma_addr_t rss_cpu_buf_pa;
717258ba
VK		 2150 union vnic_rss_cpu *rss_cpu_buf_va = NULL;
2151 unsigned int i;
2152 int err;
2153
2154 rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
2155 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
2156 if (!rss_cpu_buf_va)
2157 return -ENOMEM;
2158
2159 for (i = 0; i < (1 << rss_hash_bits); i++)
2160 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
2161
2162 spin_lock(&enic->devcmd_lock);
2163 err = enic_set_rss_cpu(enic,
2164 rss_cpu_buf_pa,
2165 sizeof(union vnic_rss_cpu));
2166 spin_unlock(&enic->devcmd_lock);
2167
2168 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
2169 rss_cpu_buf_va, rss_cpu_buf_pa);
2170
2171 return err;
2172}
2173
2174static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
2175 u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
68f71708 2176{
68f71708
SF		 2177 const u8 tso_ipid_split_en = 0;
2178 const u8 ig_vlan_strip_en = 1;
383ab92f 2179 int err;
68f71708 2180
717258ba
VK		 2181 /* Enable VLAN tag stripping.
2182 */
68f71708 2183
383ab92f
VK		 2184 spin_lock(&enic->devcmd_lock);
2185 err = enic_set_nic_cfg(enic,
68f71708
SF		 2186 rss_default_cpu, rss_hash_type,
2187 rss_hash_bits, rss_base_cpu,
2188 rss_enable, tso_ipid_split_en,
2189 ig_vlan_strip_en);
383ab92f
VK		 2190 spin_unlock(&enic->devcmd_lock);
2191
2192 return err;
2193}
2194
717258ba
VK		 2195static int enic_set_rss_nic_cfg(struct enic *enic)
2196{
2197 struct device *dev = enic_get_dev(enic);
2198 const u8 rss_default_cpu = 0;
2199 const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
2200 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
2201 NIC_CFG_RSS_HASH_TYPE_IPV6 |
2202 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
2203 const u8 rss_hash_bits = 7;
2204 const u8 rss_base_cpu = 0;
2205 u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
2206
2207 if (rss_enable) {
2208 if (!enic_set_rsskey(enic)) {
2209 if (enic_set_rsscpu(enic, rss_hash_bits)) {
2210 rss_enable = 0;
2211 dev_warn(dev, "RSS disabled, "
2212 "Failed to set RSS cpu indirection table.");
2213 }
2214 } else {
2215 rss_enable = 0;
2216 dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
2217 }
2218 }
2219
2220 return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
2221 rss_hash_bits, rss_base_cpu, rss_enable);
2222}
2223
383ab92f
VK		 2224static int enic_dev_hang_notify(struct enic *enic)
2225{
2226 int err;
2227
2228 spin_lock(&enic->devcmd_lock);
2229 err = vnic_dev_hang_notify(enic->vdev);
2230 spin_unlock(&enic->devcmd_lock);
2231
2232 return err;
68f71708
SF		 2233}
2234
2fdba388 2235static int enic_dev_set_ig_vlan_rewrite_mode(struct enic *enic)
f8cac14a
VK		 2236{
2237 int err;
2238
2239 spin_lock(&enic->devcmd_lock);
2240 err = vnic_dev_set_ig_vlan_rewrite_mode(enic->vdev,
2241 IG_VLAN_REWRITE_MODE_PRIORITY_TAG_DEFAULT_VLAN);
2242 spin_unlock(&enic->devcmd_lock);
2243
2244 return err;
2245}
2246
01f2e4ea
SF		 2247static void enic_reset(struct work_struct *work)
2248{
2249 struct enic *enic = container_of(work, struct enic, reset);
2250
2251 if (!netif_running(enic->netdev))
2252 return;
2253
2254 rtnl_lock();
2255
383ab92f 2256 enic_dev_hang_notify(enic);
01f2e4ea 2257 enic_stop(enic->netdev);
99ef5639
VK		 2258 enic_dev_hang_reset(enic);
2259 enic_reset_multicast_list(enic);
01f2e4ea 2260 enic_init_vnic_resources(enic);
717258ba 2261 enic_set_rss_nic_cfg(enic);
f8cac14a 2262 enic_dev_set_ig_vlan_rewrite_mode(enic);
01f2e4ea
SF		 2263 enic_open(enic->netdev);
2264
2265 rtnl_unlock();
2266}
2267
2268static int enic_set_intr_mode(struct enic *enic)
2269{
717258ba 2270 unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
6ba9cdc0 2271 unsigned int m = 1;
01f2e4ea
SF		 2272 unsigned int i;
2273
2274 /* Set interrupt mode (INTx, MSI, MSI-X) depending
717258ba 2275 * on system capabilities.
01f2e4ea
SF		 2276 *
2277 * Try MSI-X first
2278 *
2279 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2280 * (the second to last INTR is used for WQ/RQ errors)
2281 * (the last INTR is used for notifications)
2282 */
2283
2284 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2285 for (i = 0; i < n + m + 2; i++)
2286 enic->msix_entry[i].entry = i;
2287
717258ba
VK		 2288 /* Use multiple RQs if RSS is enabled
2289 */
2290
2291 if (ENIC_SETTING(enic, RSS) &&
2292 enic->config.intr_mode < 1 &&
01f2e4ea
SF		 2293 enic->rq_count >= n &&
2294 enic->wq_count >= m &&
2295 enic->cq_count >= n + m &&
717258ba 2296 enic->intr_count >= n + m + 2) {
01f2e4ea 2297
717258ba 2298 if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
01f2e4ea 2299
717258ba
VK		 2300 enic->rq_count = n;
2301 enic->wq_count = m;
2302 enic->cq_count = n + m;
2303 enic->intr_count = n + m + 2;
01f2e4ea 2304
717258ba
VK		 2305 vnic_dev_set_intr_mode(enic->vdev,
2306 VNIC_DEV_INTR_MODE_MSIX);
2307
2308 return 0;
2309 }
2310 }
2311
2312 if (enic->config.intr_mode < 1 &&
2313 enic->rq_count >= 1 &&
2314 enic->wq_count >= m &&
2315 enic->cq_count >= 1 + m &&
2316 enic->intr_count >= 1 + m + 2) {
2317 if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
2318
2319 enic->rq_count = 1;
2320 enic->wq_count = m;
2321 enic->cq_count = 1 + m;
2322 enic->intr_count = 1 + m + 2;
2323
2324 vnic_dev_set_intr_mode(enic->vdev,
2325 VNIC_DEV_INTR_MODE_MSIX);
2326
2327 return 0;
2328 }
01f2e4ea
SF		 2329 }
2330
2331 /* Next try MSI
2332 *
2333 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2334 */
2335
2336 if (enic->config.intr_mode < 2 &&
2337 enic->rq_count >= 1 &&
2338 enic->wq_count >= 1 &&
2339 enic->cq_count >= 2 &&
2340 enic->intr_count >= 1 &&
2341 !pci_enable_msi(enic->pdev)) {
2342
2343 enic->rq_count = 1;
2344 enic->wq_count = 1;
2345 enic->cq_count = 2;
2346 enic->intr_count = 1;
2347
2348 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2349
2350 return 0;
2351 }
2352
2353 /* Next try INTx
2354 *
2355 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2356 * (the first INTR is used for WQ/RQ)
2357 * (the second INTR is used for WQ/RQ errors)
2358 * (the last INTR is used for notifications)
2359 */
2360
2361 if (enic->config.intr_mode < 3 &&
2362 enic->rq_count >= 1 &&
2363 enic->wq_count >= 1 &&
2364 enic->cq_count >= 2 &&
2365 enic->intr_count >= 3) {
2366
2367 enic->rq_count = 1;
2368 enic->wq_count = 1;
2369 enic->cq_count = 2;
2370 enic->intr_count = 3;
2371
2372 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2373
2374 return 0;
2375 }
2376
2377 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2378
2379 return -EINVAL;
2380}
2381
2382static void enic_clear_intr_mode(struct enic *enic)
2383{
2384 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2385 case VNIC_DEV_INTR_MODE_MSIX:
2386 pci_disable_msix(enic->pdev);
2387 break;
2388 case VNIC_DEV_INTR_MODE_MSI:
2389 pci_disable_msi(enic->pdev);
2390 break;
2391 default:
2392 break;
2393 }
2394
2395 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2396}
2397
f8bd9091
SF		 2398static const struct net_device_ops enic_netdev_dynamic_ops = {
2399 .ndo_open = enic_open,
2400 .ndo_stop = enic_stop,
2401 .ndo_start_xmit = enic_hard_start_xmit,
2402 .ndo_get_stats = enic_get_stats,
2403 .ndo_validate_addr = eth_validate_addr,
319d7e84
RP		 2404 .ndo_set_rx_mode = enic_set_rx_mode,
2405 .ndo_set_multicast_list = enic_set_rx_mode,
f8bd9091
SF		 2406 .ndo_set_mac_address = enic_set_mac_address_dynamic,
2407 .ndo_change_mtu = enic_change_mtu,
2408 .ndo_vlan_rx_register = enic_vlan_rx_register,
2409 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2410 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2411 .ndo_tx_timeout = enic_tx_timeout,
2412 .ndo_set_vf_port = enic_set_vf_port,
2413 .ndo_get_vf_port = enic_get_vf_port,
2414#ifdef CONFIG_NET_POLL_CONTROLLER
2415 .ndo_poll_controller = enic_poll_controller,
2416#endif
2417};
2418
afe29f7a
SH		 2419static const struct net_device_ops enic_netdev_ops = {
2420 .ndo_open = enic_open,
2421 .ndo_stop = enic_stop,
00829823 2422 .ndo_start_xmit = enic_hard_start_xmit,
afe29f7a
SH		 2423 .ndo_get_stats = enic_get_stats,
2424 .ndo_validate_addr = eth_validate_addr,
f8bd9091 2425 .ndo_set_mac_address = enic_set_mac_address,
319d7e84
RP		 2426 .ndo_set_rx_mode = enic_set_rx_mode,
2427 .ndo_set_multicast_list = enic_set_rx_mode,
afe29f7a
SH		 2428 .ndo_change_mtu = enic_change_mtu,
2429 .ndo_vlan_rx_register = enic_vlan_rx_register,
2430 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2431 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2432 .ndo_tx_timeout = enic_tx_timeout,
2433#ifdef CONFIG_NET_POLL_CONTROLLER
2434 .ndo_poll_controller = enic_poll_controller,
2435#endif
2436};
2437
2fdba388 2438static void enic_dev_deinit(struct enic *enic)
6fdfa970 2439{
717258ba
VK		 2440 unsigned int i;
2441
2442 for (i = 0; i < enic->rq_count; i++)
2443 netif_napi_del(&enic->napi[i]);
2444
6fdfa970
SF		 2445 enic_free_vnic_resources(enic);
2446 enic_clear_intr_mode(enic);
2447}
2448
2fdba388 2449static int enic_dev_init(struct enic *enic)
6fdfa970 2450{
a7a79deb 2451 struct device *dev = enic_get_dev(enic);
6fdfa970 2452 struct net_device *netdev = enic->netdev;
717258ba 2453 unsigned int i;
6fdfa970
SF		 2454 int err;
2455
2456 /* Get vNIC configuration
2457 */
2458
2459 err = enic_get_vnic_config(enic);
2460 if (err) {
a7a79deb 2461 dev_err(dev, "Get vNIC configuration failed, aborting\n");
6fdfa970
SF		 2462 return err;
2463 }
2464
2465 /* Get available resource counts
2466 */
2467
2468 enic_get_res_counts(enic);
2469
2470 /* Set interrupt mode based on resource counts and system
2471 * capabilities
2472 */
2473
2474 err = enic_set_intr_mode(enic);
2475 if (err) {
a7a79deb
VK		 2476 dev_err(dev, "Failed to set intr mode based on resource "
2477 "counts and system capabilities, aborting\n");
6fdfa970
SF		 2478 return err;
2479 }
2480
2481 /* Allocate and configure vNIC resources
2482 */
2483
2484 err = enic_alloc_vnic_resources(enic);
2485 if (err) {
a7a79deb 2486 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
6fdfa970
SF		 2487 goto err_out_free_vnic_resources;
2488 }
2489
2490 enic_init_vnic_resources(enic);
2491
2492 err = enic_set_rq_alloc_buf(enic);
2493 if (err) {
a7a79deb 2494 dev_err(dev, "Failed to set RQ buffer allocator, aborting\n");
6fdfa970
SF		 2495 goto err_out_free_vnic_resources;
2496 }
2497
717258ba 2498 err = enic_set_rss_nic_cfg(enic);
6fdfa970 2499 if (err) {
a7a79deb 2500 dev_err(dev, "Failed to config nic, aborting\n");
6fdfa970
SF		 2501 goto err_out_free_vnic_resources;
2502 }
2503
f8cac14a
VK		 2504 err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2505 if (err) {
53c90536 2506 dev_err(dev,
f8cac14a
VK		 2507 "Failed to set ingress vlan rewrite mode, aborting.\n");
2508 goto err_out_free_vnic_resources;
2509 }
2510
6fdfa970
SF		 2511 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2512 default:
717258ba 2513 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
6fdfa970
SF		 2514 break;
2515 case VNIC_DEV_INTR_MODE_MSIX:
717258ba
VK		 2516 for (i = 0; i < enic->rq_count; i++)
2517 netif_napi_add(netdev, &enic->napi[i],
2518 enic_poll_msix, 64);
6fdfa970
SF		 2519 break;
2520 }
2521
2522 return 0;
2523
2524err_out_free_vnic_resources:
2525 enic_clear_intr_mode(enic);
2526 enic_free_vnic_resources(enic);
2527
2528 return err;
2529}
2530
27e6c7d3
SF		 2531static void enic_iounmap(struct enic *enic)
2532{
2533 unsigned int i;
2534
2535 for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2536 if (enic->bar[i].vaddr)
2537 iounmap(enic->bar[i].vaddr);
2538}
2539
01f2e4ea
SF		 2540static int __devinit enic_probe(struct pci_dev *pdev,
2541 const struct pci_device_id *ent)
2542{
a7a79deb 2543 struct device *dev = &pdev->dev;
01f2e4ea
SF		 2544 struct net_device *netdev;
2545 struct enic *enic;
2546 int using_dac = 0;
2547 unsigned int i;
2548 int err;
2549
01f2e4ea
SF		 2550 /* Allocate net device structure and initialize. Private
2551 * instance data is initialized to zero.
2552 */
2553
2554 netdev = alloc_etherdev(sizeof(struct enic));
2555 if (!netdev) {
a7a79deb 2556 pr_err("Etherdev alloc failed, aborting\n");
01f2e4ea
SF		 2557 return -ENOMEM;
2558 }
2559
01f2e4ea
SF		 2560 pci_set_drvdata(pdev, netdev);
2561
2562 SET_NETDEV_DEV(netdev, &pdev->dev);
2563
2564 enic = netdev_priv(netdev);
2565 enic->netdev = netdev;
2566 enic->pdev = pdev;
2567
2568 /* Setup PCI resources
2569 */
2570
29046f9b 2571 err = pci_enable_device_mem(pdev);
01f2e4ea 2572 if (err) {
a7a79deb 2573 dev_err(dev, "Cannot enable PCI device, aborting\n");
01f2e4ea
SF		 2574 goto err_out_free_netdev;
2575 }
2576
2577 err = pci_request_regions(pdev, DRV_NAME);
2578 if (err) {
a7a79deb 2579 dev_err(dev, "Cannot request PCI regions, aborting\n");
01f2e4ea
SF		 2580 goto err_out_disable_device;
2581 }
2582
2583 pci_set_master(pdev);
2584
2585 /* Query PCI controller on system for DMA addressing
2586 * limitation for the device. Try 40-bit first, and
2587 * fail to 32-bit.
2588 */
2589
50cf156a 2590 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
01f2e4ea 2591 if (err) {
284901a9 2592 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
01f2e4ea 2593 if (err) {
a7a79deb 2594 dev_err(dev, "No usable DMA configuration, aborting\n");
01f2e4ea
SF		 2595 goto err_out_release_regions;
2596 }
284901a9 2597 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
01f2e4ea 2598 if (err) {
a7a79deb
VK		 2599 dev_err(dev, "Unable to obtain %u-bit DMA "
2600 "for consistent allocations, aborting\n", 32);
01f2e4ea
SF		 2601 goto err_out_release_regions;
2602 }
2603 } else {
50cf156a 2604 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
01f2e4ea 2605 if (err) {
a7a79deb
VK		 2606 dev_err(dev, "Unable to obtain %u-bit DMA "
2607 "for consistent allocations, aborting\n", 40);
01f2e4ea
SF		 2608 goto err_out_release_regions;
2609 }
2610 using_dac = 1;
2611 }
2612
27e6c7d3 2613 /* Map vNIC resources from BAR0-5
01f2e4ea
SF		 2614 */
2615
27e6c7d3
SF		 2616 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2617 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2618 continue;
2619 enic->bar[i].len = pci_resource_len(pdev, i);
2620 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2621 if (!enic->bar[i].vaddr) {
a7a79deb 2622 dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
27e6c7d3
SF		 2623 err = -ENODEV;
2624 goto err_out_iounmap;
2625 }
2626 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
01f2e4ea
SF		 2627 }
2628
2629 /* Register vNIC device
2630 */
2631
27e6c7d3
SF		 2632 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2633 ARRAY_SIZE(enic->bar));
01f2e4ea 2634 if (!enic->vdev) {
a7a79deb 2635 dev_err(dev, "vNIC registration failed, aborting\n");
01f2e4ea
SF		 2636 err = -ENODEV;
2637 goto err_out_iounmap;
2638 }
2639
2640 /* Issue device open to get device in known state
2641 */
2642
2643 err = enic_dev_open(enic);
2644 if (err) {
a7a79deb 2645 dev_err(dev, "vNIC dev open failed, aborting\n");
01f2e4ea
SF		 2646 goto err_out_vnic_unregister;
2647 }
2648
2649 /* Issue device init to initialize the vnic-to-switch link.
2650 * We'll start with carrier off and wait for link UP
2651 * notification later to turn on carrier. We don't need
2652 * to wait here for the vnic-to-switch link initialization
2653 * to complete; link UP notification is the indication that
2654 * the process is complete.
2655 */
2656
2657 netif_carrier_off(netdev);
2658
a7a79deb
VK		 2659 /* Do not call dev_init for a dynamic vnic.
2660 * For a dynamic vnic, init_prov_info will be
2661 * called later by an upper layer.
2662 */
2663
f8bd9091
SF		 2664 if (!enic_is_dynamic(enic)) {
2665 err = vnic_dev_init(enic->vdev, 0);
2666 if (err) {
a7a79deb 2667 dev_err(dev, "vNIC dev init failed, aborting\n");
f8bd9091
SF		 2668 goto err_out_dev_close;
2669 }
01f2e4ea
SF		 2670 }
2671
383ab92f
VK		 2672 /* Setup devcmd lock
2673 */
2674
2675 spin_lock_init(&enic->devcmd_lock);
2676
6fdfa970 2677 err = enic_dev_init(enic);
01f2e4ea 2678 if (err) {
a7a79deb 2679 dev_err(dev, "Device initialization failed, aborting\n");
01f2e4ea
SF		 2680 goto err_out_dev_close;
2681 }
2682
383ab92f 2683 /* Setup notification timer, HW reset task, and wq locks
01f2e4ea
SF		 2684 */
2685
2686 init_timer(&enic->notify_timer);
2687 enic->notify_timer.function = enic_notify_timer;
2688 enic->notify_timer.data = (unsigned long)enic;
2689
2690 INIT_WORK(&enic->reset, enic_reset);
2691
2692 for (i = 0; i < enic->wq_count; i++)
2693 spin_lock_init(&enic->wq_lock[i]);
2694
01f2e4ea
SF		 2695 /* Register net device
2696 */
2697
2698 enic->port_mtu = enic->config.mtu;
2699 (void)enic_change_mtu(netdev, enic->port_mtu);
2700
2701 err = enic_set_mac_addr(netdev, enic->mac_addr);
2702 if (err) {
a7a79deb 2703 dev_err(dev, "Invalid MAC address, aborting\n");
6fdfa970 2704 goto err_out_dev_deinit;
01f2e4ea
SF		 2705 }
2706
7c844599
SF		 2707 enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2708 enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2709
f8bd9091
SF		 2710 if (enic_is_dynamic(enic))
2711 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2712 else
2713 netdev->netdev_ops = &enic_netdev_ops;
2714
01f2e4ea
SF		 2715 netdev->watchdog_timeo = 2 * HZ;
2716 netdev->ethtool_ops = &enic_ethtool_ops;
01f2e4ea 2717
73c1ea9b 2718 netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
1825aca6
VK		 2719 if (ENIC_SETTING(enic, LOOP)) {
2720 netdev->features &= ~NETIF_F_HW_VLAN_TX;
2721 enic->loop_enable = 1;
2722 enic->loop_tag = enic->config.loop_tag;
2723 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2724 }
01f2e4ea
SF		 2725 if (ENIC_SETTING(enic, TXCSUM))
2726 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2727 if (ENIC_SETTING(enic, TSO))
2728 netdev->features |= NETIF_F_TSO |
2729 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
86ca9db7 2730 if (ENIC_SETTING(enic, LRO))
88132f55 2731 netdev->features |= NETIF_F_GRO;
01f2e4ea
SF		 2732 if (using_dac)
2733 netdev->features |= NETIF_F_HIGHDMA;
2734
01f2e4ea
SF		 2735 enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
2736
01f2e4ea
SF		 2737 err = register_netdev(netdev);
2738 if (err) {
a7a79deb 2739 dev_err(dev, "Cannot register net device, aborting\n");
6fdfa970 2740 goto err_out_dev_deinit;
01f2e4ea
SF		 2741 }
2742
2743 return 0;
2744
6fdfa970
SF		 2745err_out_dev_deinit:
2746 enic_dev_deinit(enic);
01f2e4ea
SF		 2747err_out_dev_close:
2748 vnic_dev_close(enic->vdev);
2749err_out_vnic_unregister:
01f2e4ea
SF		 2750 vnic_dev_unregister(enic->vdev);
2751err_out_iounmap:
2752 enic_iounmap(enic);
2753err_out_release_regions:
2754 pci_release_regions(pdev);
2755err_out_disable_device:
2756 pci_disable_device(pdev);
2757err_out_free_netdev:
2758 pci_set_drvdata(pdev, NULL);
2759 free_netdev(netdev);
2760
2761 return err;
2762}
2763
2764static void __devexit enic_remove(struct pci_dev *pdev)
2765{
2766 struct net_device *netdev = pci_get_drvdata(pdev);
2767
2768 if (netdev) {
2769 struct enic *enic = netdev_priv(netdev);
2770
2771 flush_scheduled_work();
2772 unregister_netdev(netdev);
6fdfa970 2773 enic_dev_deinit(enic);
01f2e4ea 2774 vnic_dev_close(enic->vdev);
01f2e4ea
SF		 2775 vnic_dev_unregister(enic->vdev);
2776 enic_iounmap(enic);
2777 pci_release_regions(pdev);
2778 pci_disable_device(pdev);
2779 pci_set_drvdata(pdev, NULL);
2780 free_netdev(netdev);
2781 }
2782}
2783
2784static struct pci_driver enic_driver = {
2785 .name = DRV_NAME,
2786 .id_table = enic_id_table,
2787 .probe = enic_probe,
2788 .remove = __devexit_p(enic_remove),
2789};
2790
2791static int __init enic_init_module(void)
2792{
a7a79deb 2793 pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
01f2e4ea
SF		 2794
2795 return pci_register_driver(&enic_driver);
2796}
2797
2798static void __exit enic_cleanup_module(void)
2799{
2800 pci_unregister_driver(&enic_driver);
2801}
2802
2803module_init(enic_init_module);
2804module_exit(enic_cleanup_module);
Linux kernel - Deliverables
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