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[mirror_ubuntu-zesty-kernel.git] / drivers / net / enic / enic_main.c
CommitLineData
01f2e4ea
SF		 1/*
2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 *
18 */
19
20#include <linux/module.h>
21#include <linux/kernel.h>
22#include <linux/string.h>
23#include <linux/errno.h>
24#include <linux/types.h>
25#include <linux/init.h>
26#include <linux/workqueue.h>
27#include <linux/pci.h>
28#include <linux/netdevice.h>
29#include <linux/etherdevice.h>
30#include <linux/if_ether.h>
31#include <linux/if_vlan.h>
32#include <linux/ethtool.h>
33#include <linux/in.h>
34#include <linux/ip.h>
35#include <linux/ipv6.h>
36#include <linux/tcp.h>
b7c6bfb7 37#include <net/ip6_checksum.h>
01f2e4ea
SF		 38
39#include "cq_enet_desc.h"
40#include "vnic_dev.h"
41#include "vnic_intr.h"
42#include "vnic_stats.h"
43#include "enic_res.h"
44#include "enic.h"
45
46#define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
ea0d7d91
SF		 47#define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS)
48#define MAX_TSO (1 << 16)
49#define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
50
51#define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */
01f2e4ea
SF		 52
53/* Supported devices */
54static struct pci_device_id enic_id_table[] = {
ea0d7d91 55 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
01f2e4ea
SF		 56 { 0, } /* end of table */
57};
58
59MODULE_DESCRIPTION(DRV_DESCRIPTION);
60MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
61MODULE_LICENSE("GPL");
62MODULE_VERSION(DRV_VERSION);
63MODULE_DEVICE_TABLE(pci, enic_id_table);
64
65struct enic_stat {
66 char name[ETH_GSTRING_LEN];
67 unsigned int offset;
68};
69
70#define ENIC_TX_STAT(stat) \
71 { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
72#define ENIC_RX_STAT(stat) \
73 { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
74
75static const struct enic_stat enic_tx_stats[] = {
76 ENIC_TX_STAT(tx_frames_ok),
77 ENIC_TX_STAT(tx_unicast_frames_ok),
78 ENIC_TX_STAT(tx_multicast_frames_ok),
79 ENIC_TX_STAT(tx_broadcast_frames_ok),
80 ENIC_TX_STAT(tx_bytes_ok),
81 ENIC_TX_STAT(tx_unicast_bytes_ok),
82 ENIC_TX_STAT(tx_multicast_bytes_ok),
83 ENIC_TX_STAT(tx_broadcast_bytes_ok),
84 ENIC_TX_STAT(tx_drops),
85 ENIC_TX_STAT(tx_errors),
86 ENIC_TX_STAT(tx_tso),
87};
88
89static const struct enic_stat enic_rx_stats[] = {
90 ENIC_RX_STAT(rx_frames_ok),
91 ENIC_RX_STAT(rx_frames_total),
92 ENIC_RX_STAT(rx_unicast_frames_ok),
93 ENIC_RX_STAT(rx_multicast_frames_ok),
94 ENIC_RX_STAT(rx_broadcast_frames_ok),
95 ENIC_RX_STAT(rx_bytes_ok),
96 ENIC_RX_STAT(rx_unicast_bytes_ok),
97 ENIC_RX_STAT(rx_multicast_bytes_ok),
98 ENIC_RX_STAT(rx_broadcast_bytes_ok),
99 ENIC_RX_STAT(rx_drop),
100 ENIC_RX_STAT(rx_no_bufs),
101 ENIC_RX_STAT(rx_errors),
102 ENIC_RX_STAT(rx_rss),
103 ENIC_RX_STAT(rx_crc_errors),
104 ENIC_RX_STAT(rx_frames_64),
105 ENIC_RX_STAT(rx_frames_127),
106 ENIC_RX_STAT(rx_frames_255),
107 ENIC_RX_STAT(rx_frames_511),
108 ENIC_RX_STAT(rx_frames_1023),
109 ENIC_RX_STAT(rx_frames_1518),
110 ENIC_RX_STAT(rx_frames_to_max),
111};
112
113static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
114static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
115
116static int enic_get_settings(struct net_device *netdev,
117 struct ethtool_cmd *ecmd)
118{
119 struct enic *enic = netdev_priv(netdev);
120
121 ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
122 ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
123 ecmd->port = PORT_FIBRE;
124 ecmd->transceiver = XCVR_EXTERNAL;
125
126 if (netif_carrier_ok(netdev)) {
127 ecmd->speed = vnic_dev_port_speed(enic->vdev);
128 ecmd->duplex = DUPLEX_FULL;
129 } else {
130 ecmd->speed = -1;
131 ecmd->duplex = -1;
132 }
133
134 ecmd->autoneg = AUTONEG_DISABLE;
135
136 return 0;
137}
138
139static void enic_get_drvinfo(struct net_device *netdev,
140 struct ethtool_drvinfo *drvinfo)
141{
142 struct enic *enic = netdev_priv(netdev);
143 struct vnic_devcmd_fw_info *fw_info;
144
145 spin_lock(&enic->devcmd_lock);
146 vnic_dev_fw_info(enic->vdev, &fw_info);
147 spin_unlock(&enic->devcmd_lock);
148
149 strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
150 strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
151 strncpy(drvinfo->fw_version, fw_info->fw_version,
152 sizeof(drvinfo->fw_version));
153 strncpy(drvinfo->bus_info, pci_name(enic->pdev),
154 sizeof(drvinfo->bus_info));
155}
156
157static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
158{
159 unsigned int i;
160
161 switch (stringset) {
162 case ETH_SS_STATS:
163 for (i = 0; i < enic_n_tx_stats; i++) {
164 memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
165 data += ETH_GSTRING_LEN;
166 }
167 for (i = 0; i < enic_n_rx_stats; i++) {
168 memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
169 data += ETH_GSTRING_LEN;
170 }
171 break;
172 }
173}
174
25f0a061 175static int enic_get_sset_count(struct net_device *netdev, int sset)
01f2e4ea 176{
25f0a061
SF		 177 switch (sset) {
178 case ETH_SS_STATS:
179 return enic_n_tx_stats + enic_n_rx_stats;
180 default:
181 return -EOPNOTSUPP;
182 }
01f2e4ea
SF		 183}
184
185static void enic_get_ethtool_stats(struct net_device *netdev,
186 struct ethtool_stats *stats, u64 *data)
187{
188 struct enic *enic = netdev_priv(netdev);
189 struct vnic_stats *vstats;
190 unsigned int i;
191
192 spin_lock(&enic->devcmd_lock);
193 vnic_dev_stats_dump(enic->vdev, &vstats);
194 spin_unlock(&enic->devcmd_lock);
195
196 for (i = 0; i < enic_n_tx_stats; i++)
197 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
198 for (i = 0; i < enic_n_rx_stats; i++)
199 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
200}
201
202static u32 enic_get_rx_csum(struct net_device *netdev)
203{
204 struct enic *enic = netdev_priv(netdev);
205 return enic->csum_rx_enabled;
206}
207
208static int enic_set_rx_csum(struct net_device *netdev, u32 data)
209{
210 struct enic *enic = netdev_priv(netdev);
211
25f0a061
SF		 212 if (data && !ENIC_SETTING(enic, RXCSUM))
213 return -EINVAL;
214
215 enic->csum_rx_enabled = !!data;
01f2e4ea
SF		 216
217 return 0;
218}
219
220static int enic_set_tx_csum(struct net_device *netdev, u32 data)
221{
222 struct enic *enic = netdev_priv(netdev);
223
25f0a061
SF		 224 if (data && !ENIC_SETTING(enic, TXCSUM))
225 return -EINVAL;
226
227 if (data)
01f2e4ea
SF		 228 netdev->features |= NETIF_F_HW_CSUM;
229 else
230 netdev->features &= ~NETIF_F_HW_CSUM;
231
232 return 0;
233}
234
235static int enic_set_tso(struct net_device *netdev, u32 data)
236{
237 struct enic *enic = netdev_priv(netdev);
238
25f0a061
SF		 239 if (data && !ENIC_SETTING(enic, TSO))
240 return -EINVAL;
241
242 if (data)
01f2e4ea
SF		 243 netdev->features |=
244 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
245 else
246 netdev->features &=
247 ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN);
248
249 return 0;
250}
251
252static u32 enic_get_msglevel(struct net_device *netdev)
253{
254 struct enic *enic = netdev_priv(netdev);
255 return enic->msg_enable;
256}
257
258static void enic_set_msglevel(struct net_device *netdev, u32 value)
259{
260 struct enic *enic = netdev_priv(netdev);
261 enic->msg_enable = value;
262}
263
0fc0b732 264static const struct ethtool_ops enic_ethtool_ops = {
01f2e4ea
SF		 265 .get_settings = enic_get_settings,
266 .get_drvinfo = enic_get_drvinfo,
267 .get_msglevel = enic_get_msglevel,
268 .set_msglevel = enic_set_msglevel,
269 .get_link = ethtool_op_get_link,
270 .get_strings = enic_get_strings,
25f0a061 271 .get_sset_count = enic_get_sset_count,
01f2e4ea
SF		 272 .get_ethtool_stats = enic_get_ethtool_stats,
273 .get_rx_csum = enic_get_rx_csum,
274 .set_rx_csum = enic_set_rx_csum,
275 .get_tx_csum = ethtool_op_get_tx_csum,
276 .set_tx_csum = enic_set_tx_csum,
277 .get_sg = ethtool_op_get_sg,
278 .set_sg = ethtool_op_set_sg,
279 .get_tso = ethtool_op_get_tso,
280 .set_tso = enic_set_tso,
86ca9db7
SF		 281 .get_flags = ethtool_op_get_flags,
282 .set_flags = ethtool_op_set_flags,
01f2e4ea
SF		 283};
284
285static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
286{
287 struct enic *enic = vnic_dev_priv(wq->vdev);
288
289 if (buf->sop)
290 pci_unmap_single(enic->pdev, buf->dma_addr,
291 buf->len, PCI_DMA_TODEVICE);
292 else
293 pci_unmap_page(enic->pdev, buf->dma_addr,
294 buf->len, PCI_DMA_TODEVICE);
295
296 if (buf->os_buf)
297 dev_kfree_skb_any(buf->os_buf);
298}
299
300static void enic_wq_free_buf(struct vnic_wq *wq,
301 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
302{
303 enic_free_wq_buf(wq, buf);
304}
305
306static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
307 u8 type, u16 q_number, u16 completed_index, void *opaque)
308{
309 struct enic *enic = vnic_dev_priv(vdev);
310
311 spin_lock(&enic->wq_lock[q_number]);
312
313 vnic_wq_service(&enic->wq[q_number], cq_desc,
314 completed_index, enic_wq_free_buf,
315 opaque);
316
317 if (netif_queue_stopped(enic->netdev) &&
ea0d7d91
SF		 318 vnic_wq_desc_avail(&enic->wq[q_number]) >=
319 (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
01f2e4ea
SF		 320 netif_wake_queue(enic->netdev);
321
322 spin_unlock(&enic->wq_lock[q_number]);
323
324 return 0;
325}
326
327static void enic_log_q_error(struct enic *enic)
328{
329 unsigned int i;
330 u32 error_status;
331
332 for (i = 0; i < enic->wq_count; i++) {
333 error_status = vnic_wq_error_status(&enic->wq[i]);
334 if (error_status)
335 printk(KERN_ERR PFX "%s: WQ[%d] error_status %d\n",
336 enic->netdev->name, i, error_status);
337 }
338
339 for (i = 0; i < enic->rq_count; i++) {
340 error_status = vnic_rq_error_status(&enic->rq[i]);
341 if (error_status)
342 printk(KERN_ERR PFX "%s: RQ[%d] error_status %d\n",
343 enic->netdev->name, i, error_status);
344 }
345}
346
347static void enic_link_check(struct enic *enic)
348{
349 int link_status = vnic_dev_link_status(enic->vdev);
350 int carrier_ok = netif_carrier_ok(enic->netdev);
351
352 if (link_status && !carrier_ok) {
353 printk(KERN_INFO PFX "%s: Link UP\n", enic->netdev->name);
354 netif_carrier_on(enic->netdev);
355 } else if (!link_status && carrier_ok) {
356 printk(KERN_INFO PFX "%s: Link DOWN\n", enic->netdev->name);
357 netif_carrier_off(enic->netdev);
358 }
359}
360
361static void enic_mtu_check(struct enic *enic)
362{
363 u32 mtu = vnic_dev_mtu(enic->vdev);
364
491598a4 365 if (mtu && mtu != enic->port_mtu) {
01f2e4ea
SF		 366 if (mtu < enic->netdev->mtu)
367 printk(KERN_WARNING PFX
368 "%s: interface MTU (%d) set higher "
369 "than switch port MTU (%d)\n",
370 enic->netdev->name, enic->netdev->mtu, mtu);
371 enic->port_mtu = mtu;
372 }
373}
374
375static void enic_msglvl_check(struct enic *enic)
376{
377 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
378
379 if (msg_enable != enic->msg_enable) {
380 printk(KERN_INFO PFX "%s: msg lvl changed from 0x%x to 0x%x\n",
381 enic->netdev->name, enic->msg_enable, msg_enable);
382 enic->msg_enable = msg_enable;
383 }
384}
385
386static void enic_notify_check(struct enic *enic)
387{
388 enic_msglvl_check(enic);
389 enic_mtu_check(enic);
390 enic_link_check(enic);
391}
392
393#define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
394
395static irqreturn_t enic_isr_legacy(int irq, void *data)
396{
397 struct net_device *netdev = data;
398 struct enic *enic = netdev_priv(netdev);
399 u32 pba;
400
401 vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]);
402
403 pba = vnic_intr_legacy_pba(enic->legacy_pba);
404 if (!pba) {
405 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
406 return IRQ_NONE; /* not our interrupt */
407 }
408
ed8af6b2
SF		 409 if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY)) {
410 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_NOTIFY]);
01f2e4ea 411 enic_notify_check(enic);
ed8af6b2 412 }
01f2e4ea
SF		 413
414 if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) {
ed8af6b2 415 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_ERR]);
01f2e4ea
SF		 416 enic_log_q_error(enic);
417 /* schedule recovery from WQ/RQ error */
418 schedule_work(&enic->reset);
419 return IRQ_HANDLED;
420 }
421
422 if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) {
288379f0
BH		 423 if (napi_schedule_prep(&enic->napi))
424 __napi_schedule(&enic->napi);
01f2e4ea
SF		 425 } else {
426 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
427 }
428
429 return IRQ_HANDLED;
430}
431
432static irqreturn_t enic_isr_msi(int irq, void *data)
433{
434 struct enic *enic = data;
435
436 /* With MSI, there is no sharing of interrupts, so this is
437 * our interrupt and there is no need to ack it. The device
438 * is not providing per-vector masking, so the OS will not
439 * write to PCI config space to mask/unmask the interrupt.
440 * We're using mask_on_assertion for MSI, so the device
441 * automatically masks the interrupt when the interrupt is
442 * generated. Later, when exiting polling, the interrupt
443 * will be unmasked (see enic_poll).
444 *
445 * Also, the device uses the same PCIe Traffic Class (TC)
446 * for Memory Write data and MSI, so there are no ordering
447 * issues; the MSI will always arrive at the Root Complex
448 * _after_ corresponding Memory Writes (i.e. descriptor
449 * writes).
450 */
451
288379f0 452 napi_schedule(&enic->napi);
01f2e4ea
SF		 453
454 return IRQ_HANDLED;
455}
456
457static irqreturn_t enic_isr_msix_rq(int irq, void *data)
458{
459 struct enic *enic = data;
460
461 /* schedule NAPI polling for RQ cleanup */
288379f0 462 napi_schedule(&enic->napi);
01f2e4ea
SF		 463
464 return IRQ_HANDLED;
465}
466
467static irqreturn_t enic_isr_msix_wq(int irq, void *data)
468{
469 struct enic *enic = data;
470 unsigned int wq_work_to_do = -1; /* no limit */
471 unsigned int wq_work_done;
472
473 wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
474 wq_work_to_do, enic_wq_service, NULL);
475
476 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ],
477 wq_work_done,
478 1 /* unmask intr */,
479 1 /* reset intr timer */);
480
481 return IRQ_HANDLED;
482}
483
484static irqreturn_t enic_isr_msix_err(int irq, void *data)
485{
486 struct enic *enic = data;
487
ed8af6b2
SF		 488 vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_ERR]);
489
01f2e4ea
SF		 490 enic_log_q_error(enic);
491
492 /* schedule recovery from WQ/RQ error */
493 schedule_work(&enic->reset);
494
495 return IRQ_HANDLED;
496}
497
498static irqreturn_t enic_isr_msix_notify(int irq, void *data)
499{
500 struct enic *enic = data;
501
ed8af6b2 502 vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_NOTIFY]);
01f2e4ea 503 enic_notify_check(enic);
01f2e4ea
SF		 504
505 return IRQ_HANDLED;
506}
507
508static inline void enic_queue_wq_skb_cont(struct enic *enic,
509 struct vnic_wq *wq, struct sk_buff *skb,
510 unsigned int len_left)
511{
512 skb_frag_t *frag;
513
514 /* Queue additional data fragments */
515 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
516 len_left -= frag->size;
517 enic_queue_wq_desc_cont(wq, skb,
518 pci_map_page(enic->pdev, frag->page,
519 frag->page_offset, frag->size,
520 PCI_DMA_TODEVICE),
521 frag->size,
522 (len_left == 0)); /* EOP? */
523 }
524}
525
526static inline void enic_queue_wq_skb_vlan(struct enic *enic,
527 struct vnic_wq *wq, struct sk_buff *skb,
528 int vlan_tag_insert, unsigned int vlan_tag)
529{
530 unsigned int head_len = skb_headlen(skb);
531 unsigned int len_left = skb->len - head_len;
532 int eop = (len_left == 0);
533
ea0d7d91
SF		 534 /* Queue the main skb fragment. The fragments are no larger
535 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
536 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
537 * per fragment is queued.
538 */
01f2e4ea
SF		 539 enic_queue_wq_desc(wq, skb,
540 pci_map_single(enic->pdev, skb->data,
541 head_len, PCI_DMA_TODEVICE),
542 head_len,
543 vlan_tag_insert, vlan_tag,
544 eop);
545
546 if (!eop)
547 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
548}
549
550static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
551 struct vnic_wq *wq, struct sk_buff *skb,
552 int vlan_tag_insert, unsigned int vlan_tag)
553{
554 unsigned int head_len = skb_headlen(skb);
555 unsigned int len_left = skb->len - head_len;
556 unsigned int hdr_len = skb_transport_offset(skb);
557 unsigned int csum_offset = hdr_len + skb->csum_offset;
558 int eop = (len_left == 0);
559
ea0d7d91
SF		 560 /* Queue the main skb fragment. The fragments are no larger
561 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
562 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
563 * per fragment is queued.
564 */
01f2e4ea
SF		 565 enic_queue_wq_desc_csum_l4(wq, skb,
566 pci_map_single(enic->pdev, skb->data,
567 head_len, PCI_DMA_TODEVICE),
568 head_len,
569 csum_offset,
570 hdr_len,
571 vlan_tag_insert, vlan_tag,
572 eop);
573
574 if (!eop)
575 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
576}
577
578static inline void enic_queue_wq_skb_tso(struct enic *enic,
579 struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
580 int vlan_tag_insert, unsigned int vlan_tag)
581{
ea0d7d91
SF		 582 unsigned int frag_len_left = skb_headlen(skb);
583 unsigned int len_left = skb->len - frag_len_left;
01f2e4ea
SF		 584 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
585 int eop = (len_left == 0);
ea0d7d91
SF		 586 unsigned int len;
587 dma_addr_t dma_addr;
588 unsigned int offset = 0;
589 skb_frag_t *frag;
01f2e4ea
SF		 590
591 /* Preload TCP csum field with IP pseudo hdr calculated
592 * with IP length set to zero. HW will later add in length
593 * to each TCP segment resulting from the TSO.
594 */
595
09640e63 596 if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
01f2e4ea
SF		 597 ip_hdr(skb)->check = 0;
598 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
599 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
09640e63 600 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
01f2e4ea
SF		 601 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
602 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
603 }
604
ea0d7d91
SF		 605 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
606 * for the main skb fragment
607 */
608 while (frag_len_left) {
609 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
610 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
611 len, PCI_DMA_TODEVICE);
612 enic_queue_wq_desc_tso(wq, skb,
613 dma_addr,
614 len,
615 mss, hdr_len,
616 vlan_tag_insert, vlan_tag,
617 eop && (len == frag_len_left));
618 frag_len_left -= len;
619 offset += len;
620 }
01f2e4ea 621
ea0d7d91
SF		 622 if (eop)
623 return;
624
625 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
626 * for additional data fragments
627 */
628 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
629 len_left -= frag->size;
630 frag_len_left = frag->size;
631 offset = frag->page_offset;
632
633 while (frag_len_left) {
634 len = min(frag_len_left,
635 (unsigned int)WQ_ENET_MAX_DESC_LEN);
636 dma_addr = pci_map_page(enic->pdev, frag->page,
637 offset, len,
638 PCI_DMA_TODEVICE);
639 enic_queue_wq_desc_cont(wq, skb,
640 dma_addr,
641 len,
642 (len_left == 0) &&
643 (len == frag_len_left)); /* EOP? */
644 frag_len_left -= len;
645 offset += len;
646 }
647 }
01f2e4ea
SF		 648}
649
650static inline void enic_queue_wq_skb(struct enic *enic,
651 struct vnic_wq *wq, struct sk_buff *skb)
652{
653 unsigned int mss = skb_shinfo(skb)->gso_size;
654 unsigned int vlan_tag = 0;
655 int vlan_tag_insert = 0;
656
657 if (enic->vlan_group && vlan_tx_tag_present(skb)) {
658 /* VLAN tag from trunking driver */
659 vlan_tag_insert = 1;
660 vlan_tag = vlan_tx_tag_get(skb);
661 }
662
663 if (mss)
664 enic_queue_wq_skb_tso(enic, wq, skb, mss,
665 vlan_tag_insert, vlan_tag);
666 else if (skb->ip_summed == CHECKSUM_PARTIAL)
667 enic_queue_wq_skb_csum_l4(enic, wq, skb,
668 vlan_tag_insert, vlan_tag);
669 else
670 enic_queue_wq_skb_vlan(enic, wq, skb,
671 vlan_tag_insert, vlan_tag);
672}
673
ed8af6b2 674/* netif_tx_lock held, process context with BHs disabled, or BH */
61357325
SH		 675static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
676 struct net_device *netdev)
01f2e4ea
SF		 677{
678 struct enic *enic = netdev_priv(netdev);
679 struct vnic_wq *wq = &enic->wq[0];
680 unsigned long flags;
681
682 if (skb->len <= 0) {
683 dev_kfree_skb(skb);
684 return NETDEV_TX_OK;
685 }
686
687 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
688 * which is very likely. In the off chance it's going to take
689 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
690 */
691
692 if (skb_shinfo(skb)->gso_size == 0 &&
693 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
694 skb_linearize(skb)) {
695 dev_kfree_skb(skb);
696 return NETDEV_TX_OK;
697 }
698
699 spin_lock_irqsave(&enic->wq_lock[0], flags);
700
ea0d7d91
SF		 701 if (vnic_wq_desc_avail(wq) <
702 skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
01f2e4ea
SF		 703 netif_stop_queue(netdev);
704 /* This is a hard error, log it */
705 printk(KERN_ERR PFX "%s: BUG! Tx ring full when "
706 "queue awake!\n", netdev->name);
707 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
708 return NETDEV_TX_BUSY;
709 }
710
711 enic_queue_wq_skb(enic, wq, skb);
712
ea0d7d91 713 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
01f2e4ea
SF		 714 netif_stop_queue(netdev);
715
01f2e4ea
SF		 716 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
717
718 return NETDEV_TX_OK;
719}
720
721/* dev_base_lock rwlock held, nominally process context */
722static struct net_device_stats *enic_get_stats(struct net_device *netdev)
723{
724 struct enic *enic = netdev_priv(netdev);
25f0a061 725 struct net_device_stats *net_stats = &netdev->stats;
01f2e4ea
SF		 726 struct vnic_stats *stats;
727
728 spin_lock(&enic->devcmd_lock);
729 vnic_dev_stats_dump(enic->vdev, &stats);
730 spin_unlock(&enic->devcmd_lock);
731
25f0a061
SF		 732 net_stats->tx_packets = stats->tx.tx_frames_ok;
733 net_stats->tx_bytes = stats->tx.tx_bytes_ok;
734 net_stats->tx_errors = stats->tx.tx_errors;
735 net_stats->tx_dropped = stats->tx.tx_drops;
01f2e4ea 736
25f0a061
SF		 737 net_stats->rx_packets = stats->rx.rx_frames_ok;
738 net_stats->rx_bytes = stats->rx.rx_bytes_ok;
739 net_stats->rx_errors = stats->rx.rx_errors;
740 net_stats->multicast = stats->rx.rx_multicast_frames_ok;
350991e1 741 net_stats->rx_over_errors = enic->rq_truncated_pkts;
bd9fb1a4 742 net_stats->rx_crc_errors = enic->rq_bad_fcs;
350991e1 743 net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
01f2e4ea 744
25f0a061 745 return net_stats;
01f2e4ea
SF		 746}
747
748static void enic_reset_mcaddrs(struct enic *enic)
749{
750 enic->mc_count = 0;
751}
752
753static int enic_set_mac_addr(struct net_device *netdev, char *addr)
754{
755 if (!is_valid_ether_addr(addr))
756 return -EADDRNOTAVAIL;
757
758 memcpy(netdev->dev_addr, addr, netdev->addr_len);
759
760 return 0;
761}
762
763/* netif_tx_lock held, BHs disabled */
764static void enic_set_multicast_list(struct net_device *netdev)
765{
766 struct enic *enic = netdev_priv(netdev);
767 struct dev_mc_list *list = netdev->mc_list;
768 int directed = 1;
769 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
770 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
771 int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0;
772 int allmulti = (netdev->flags & IFF_ALLMULTI) ||
773 (netdev->mc_count > ENIC_MULTICAST_PERFECT_FILTERS);
774 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
775 unsigned int mc_count = netdev->mc_count;
776 unsigned int i, j;
777
778 if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS)
779 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
780
781 spin_lock(&enic->devcmd_lock);
782
783 vnic_dev_packet_filter(enic->vdev, directed,
784 multicast, broadcast, promisc, allmulti);
785
786 /* Is there an easier way? Trying to minimize to
787 * calls to add/del multicast addrs. We keep the
788 * addrs from the last call in enic->mc_addr and
789 * look for changes to add/del.
790 */
791
792 for (i = 0; list && i < mc_count; i++) {
793 memcpy(mc_addr[i], list->dmi_addr, ETH_ALEN);
794 list = list->next;
795 }
796
797 for (i = 0; i < enic->mc_count; i++) {
798 for (j = 0; j < mc_count; j++)
799 if (compare_ether_addr(enic->mc_addr[i],
800 mc_addr[j]) == 0)
801 break;
802 if (j == mc_count)
803 enic_del_multicast_addr(enic, enic->mc_addr[i]);
804 }
805
806 for (i = 0; i < mc_count; i++) {
807 for (j = 0; j < enic->mc_count; j++)
808 if (compare_ether_addr(mc_addr[i],
809 enic->mc_addr[j]) == 0)
810 break;
811 if (j == enic->mc_count)
812 enic_add_multicast_addr(enic, mc_addr[i]);
813 }
814
815 /* Save the list to compare against next time
816 */
817
818 for (i = 0; i < mc_count; i++)
819 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
820
821 enic->mc_count = mc_count;
822
823 spin_unlock(&enic->devcmd_lock);
824}
825
826/* rtnl lock is held */
827static void enic_vlan_rx_register(struct net_device *netdev,
828 struct vlan_group *vlan_group)
829{
830 struct enic *enic = netdev_priv(netdev);
831 enic->vlan_group = vlan_group;
832}
833
834/* rtnl lock is held */
835static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
836{
837 struct enic *enic = netdev_priv(netdev);
838
839 spin_lock(&enic->devcmd_lock);
840 enic_add_vlan(enic, vid);
841 spin_unlock(&enic->devcmd_lock);
842}
843
844/* rtnl lock is held */
845static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
846{
847 struct enic *enic = netdev_priv(netdev);
848
849 spin_lock(&enic->devcmd_lock);
850 enic_del_vlan(enic, vid);
851 spin_unlock(&enic->devcmd_lock);
852}
853
854/* netif_tx_lock held, BHs disabled */
855static void enic_tx_timeout(struct net_device *netdev)
856{
857 struct enic *enic = netdev_priv(netdev);
858 schedule_work(&enic->reset);
859}
860
861static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
862{
863 struct enic *enic = vnic_dev_priv(rq->vdev);
864
865 if (!buf->os_buf)
866 return;
867
868 pci_unmap_single(enic->pdev, buf->dma_addr,
869 buf->len, PCI_DMA_FROMDEVICE);
870 dev_kfree_skb_any(buf->os_buf);
871}
872
01f2e4ea
SF		 873static int enic_rq_alloc_buf(struct vnic_rq *rq)
874{
875 struct enic *enic = vnic_dev_priv(rq->vdev);
d19e22dc 876 struct net_device *netdev = enic->netdev;
01f2e4ea 877 struct sk_buff *skb;
d19e22dc 878 unsigned int len = netdev->mtu + ETH_HLEN;
01f2e4ea
SF		 879 unsigned int os_buf_index = 0;
880 dma_addr_t dma_addr;
881
89d71a66 882 skb = netdev_alloc_skb_ip_align(netdev, len);
01f2e4ea
SF		 883 if (!skb)
884 return -ENOMEM;
885
886 dma_addr = pci_map_single(enic->pdev, skb->data,
887 len, PCI_DMA_FROMDEVICE);
888
889 enic_queue_rq_desc(rq, skb, os_buf_index,
890 dma_addr, len);
891
892 return 0;
893}
894
4badc385
SF		 895static int enic_rq_alloc_buf_a1(struct vnic_rq *rq)
896{
897 struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
898
899 if (vnic_rq_posting_soon(rq)) {
900
901 /* SW workaround for A0 HW erratum: if we're just about
902 * to write posted_index, insert a dummy desc
903 * of type resvd
904 */
905
906 rq_enet_desc_enc(desc, 0, RQ_ENET_TYPE_RESV2, 0);
907 vnic_rq_post(rq, 0, 0, 0, 0);
908 } else {
909 return enic_rq_alloc_buf(rq);
910 }
911
912 return 0;
913}
914
915static int enic_set_rq_alloc_buf(struct enic *enic)
916{
917 enum vnic_dev_hw_version hw_ver;
918 int err;
919
920 err = vnic_dev_hw_version(enic->vdev, &hw_ver);
921 if (err)
922 return err;
923
924 switch (hw_ver) {
925 case VNIC_DEV_HW_VER_A1:
926 enic->rq_alloc_buf = enic_rq_alloc_buf_a1;
927 break;
928 case VNIC_DEV_HW_VER_A2:
929 case VNIC_DEV_HW_VER_UNKNOWN:
930 enic->rq_alloc_buf = enic_rq_alloc_buf;
931 break;
932 default:
933 return -ENODEV;
934 }
935
936 return 0;
937}
938
01f2e4ea
SF		 939static int enic_get_skb_header(struct sk_buff *skb, void **iphdr,
940 void **tcph, u64 *hdr_flags, void *priv)
941{
942 struct cq_enet_rq_desc *cq_desc = priv;
943 unsigned int ip_len;
944 struct iphdr *iph;
945
946 u8 type, color, eop, sop, ingress_port, vlan_stripped;
947 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
948 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
949 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
950 u8 packet_error;
951 u16 q_number, completed_index, bytes_written, vlan, checksum;
952 u32 rss_hash;
953
954 cq_enet_rq_desc_dec(cq_desc,
955 &type, &color, &q_number, &completed_index,
956 &ingress_port, &fcoe, &eop, &sop, &rss_type,
957 &csum_not_calc, &rss_hash, &bytes_written,
958 &packet_error, &vlan_stripped, &vlan, &checksum,
959 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
960 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
961 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
962 &fcs_ok);
963
964 if (!(ipv4 && tcp && !ipv4_fragment))
965 return -1;
966
967 skb_reset_network_header(skb);
968 iph = ip_hdr(skb);
969
970 ip_len = ip_hdrlen(skb);
971 skb_set_transport_header(skb, ip_len);
972
973 /* check if ip header and tcp header are complete */
974 if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
975 return -1;
976
977 *hdr_flags = LRO_IPV4 | LRO_TCP;
978 *tcph = tcp_hdr(skb);
979 *iphdr = iph;
980
981 return 0;
982}
983
984static void enic_rq_indicate_buf(struct vnic_rq *rq,
985 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
986 int skipped, void *opaque)
987{
988 struct enic *enic = vnic_dev_priv(rq->vdev);
86ca9db7 989 struct net_device *netdev = enic->netdev;
01f2e4ea
SF		 990 struct sk_buff *skb;
991
992 u8 type, color, eop, sop, ingress_port, vlan_stripped;
993 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
994 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
995 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
996 u8 packet_error;
997 u16 q_number, completed_index, bytes_written, vlan, checksum;
998 u32 rss_hash;
999
1000 if (skipped)
1001 return;
1002
1003 skb = buf->os_buf;
1004 prefetch(skb->data - NET_IP_ALIGN);
1005 pci_unmap_single(enic->pdev, buf->dma_addr,
1006 buf->len, PCI_DMA_FROMDEVICE);
1007
1008 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1009 &type, &color, &q_number, &completed_index,
1010 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1011 &csum_not_calc, &rss_hash, &bytes_written,
1012 &packet_error, &vlan_stripped, &vlan, &checksum,
1013 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1014 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1015 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1016 &fcs_ok);
1017
1018 if (packet_error) {
1019
350991e1
SF		 1020 if (!fcs_ok) {
1021 if (bytes_written > 0)
1022 enic->rq_bad_fcs++;
1023 else if (bytes_written == 0)
1024 enic->rq_truncated_pkts++;
1025 }
01f2e4ea
SF		 1026
1027 dev_kfree_skb_any(skb);
1028
1029 return;
1030 }
1031
1032 if (eop && bytes_written > 0) {
1033
1034 /* Good receive
1035 */
1036
1037 skb_put(skb, bytes_written);
86ca9db7 1038 skb->protocol = eth_type_trans(skb, netdev);
01f2e4ea
SF		 1039
1040 if (enic->csum_rx_enabled && !csum_not_calc) {
1041 skb->csum = htons(checksum);
1042 skb->ip_summed = CHECKSUM_COMPLETE;
1043 }
1044
86ca9db7 1045 skb->dev = netdev;
01f2e4ea
SF		 1046
1047 if (enic->vlan_group && vlan_stripped) {
1048
86ca9db7 1049 if ((netdev->features & NETIF_F_LRO) && ipv4)
01f2e4ea
SF		 1050 lro_vlan_hwaccel_receive_skb(&enic->lro_mgr,
1051 skb, enic->vlan_group,
1052 vlan, cq_desc);
1053 else
1054 vlan_hwaccel_receive_skb(skb,
1055 enic->vlan_group, vlan);
1056
1057 } else {
1058
86ca9db7 1059 if ((netdev->features & NETIF_F_LRO) && ipv4)
01f2e4ea
SF		 1060 lro_receive_skb(&enic->lro_mgr, skb, cq_desc);
1061 else
1062 netif_receive_skb(skb);
1063
1064 }
1065
1066 } else {
1067
1068 /* Buffer overflow
1069 */
1070
1071 dev_kfree_skb_any(skb);
1072 }
1073}
1074
1075static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1076 u8 type, u16 q_number, u16 completed_index, void *opaque)
1077{
1078 struct enic *enic = vnic_dev_priv(vdev);
1079
1080 vnic_rq_service(&enic->rq[q_number], cq_desc,
1081 completed_index, VNIC_RQ_RETURN_DESC,
1082 enic_rq_indicate_buf, opaque);
1083
1084 return 0;
1085}
1086
1087static void enic_rq_drop_buf(struct vnic_rq *rq,
1088 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1089 int skipped, void *opaque)
1090{
1091 struct enic *enic = vnic_dev_priv(rq->vdev);
1092 struct sk_buff *skb = buf->os_buf;
1093
1094 if (skipped)
1095 return;
1096
1097 pci_unmap_single(enic->pdev, buf->dma_addr,
1098 buf->len, PCI_DMA_FROMDEVICE);
1099
1100 dev_kfree_skb_any(skb);
1101}
1102
1103static int enic_rq_service_drop(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1104 u8 type, u16 q_number, u16 completed_index, void *opaque)
1105{
1106 struct enic *enic = vnic_dev_priv(vdev);
1107
1108 vnic_rq_service(&enic->rq[q_number], cq_desc,
1109 completed_index, VNIC_RQ_RETURN_DESC,
1110 enic_rq_drop_buf, opaque);
1111
1112 return 0;
1113}
1114
1115static int enic_poll(struct napi_struct *napi, int budget)
1116{
1117 struct enic *enic = container_of(napi, struct enic, napi);
1118 struct net_device *netdev = enic->netdev;
1119 unsigned int rq_work_to_do = budget;
1120 unsigned int wq_work_to_do = -1; /* no limit */
1121 unsigned int work_done, rq_work_done, wq_work_done;
1122
1123 /* Service RQ (first) and WQ
1124 */
1125
1126 rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1127 rq_work_to_do, enic_rq_service, NULL);
1128
1129 wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1130 wq_work_to_do, enic_wq_service, NULL);
1131
1132 /* Accumulate intr event credits for this polling
1133 * cycle. An intr event is the completion of a
1134 * a WQ or RQ packet.
1135 */
1136
1137 work_done = rq_work_done + wq_work_done;
1138
1139 if (work_done > 0)
1140 vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ],
1141 work_done,
1142 0 /* don't unmask intr */,
1143 0 /* don't reset intr timer */);
1144
1145 if (rq_work_done > 0) {
1146
1147 /* Replenish RQ
1148 */
1149
4badc385 1150 vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
01f2e4ea
SF		 1151
1152 } else {
1153
1154 /* If no work done, flush all LROs and exit polling
1155 */
1156
86ca9db7 1157 if (netdev->features & NETIF_F_LRO)
01f2e4ea
SF		 1158 lro_flush_all(&enic->lro_mgr);
1159
288379f0 1160 napi_complete(napi);
ed8af6b2 1161 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
01f2e4ea
SF		 1162 }
1163
1164 return rq_work_done;
1165}
1166
1167static int enic_poll_msix(struct napi_struct *napi, int budget)
1168{
1169 struct enic *enic = container_of(napi, struct enic, napi);
1170 struct net_device *netdev = enic->netdev;
1171 unsigned int work_to_do = budget;
1172 unsigned int work_done;
1173
1174 /* Service RQ
1175 */
1176
1177 work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1178 work_to_do, enic_rq_service, NULL);
1179
1180 if (work_done > 0) {
1181
1182 /* Replenish RQ
1183 */
1184
4badc385 1185 vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
01f2e4ea 1186
ed8af6b2 1187 /* Return intr event credits for this polling
01f2e4ea 1188 * cycle. An intr event is the completion of a
ed8af6b2 1189 * RQ packet.
01f2e4ea
SF		 1190 */
1191
1192 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ],
1193 work_done,
1194 0 /* don't unmask intr */,
1195 0 /* don't reset intr timer */);
1196 } else {
1197
1198 /* If no work done, flush all LROs and exit polling
1199 */
1200
86ca9db7 1201 if (netdev->features & NETIF_F_LRO)
01f2e4ea
SF		 1202 lro_flush_all(&enic->lro_mgr);
1203
288379f0 1204 napi_complete(napi);
01f2e4ea
SF		 1205 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
1206 }
1207
1208 return work_done;
1209}
1210
1211static void enic_notify_timer(unsigned long data)
1212{
1213 struct enic *enic = (struct enic *)data;
1214
1215 enic_notify_check(enic);
1216
25f0a061
SF		 1217 mod_timer(&enic->notify_timer,
1218 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
01f2e4ea
SF		 1219}
1220
1221static void enic_free_intr(struct enic *enic)
1222{
1223 struct net_device *netdev = enic->netdev;
1224 unsigned int i;
1225
1226 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1227 case VNIC_DEV_INTR_MODE_INTX:
01f2e4ea
SF		 1228 free_irq(enic->pdev->irq, netdev);
1229 break;
8f4d248c
SF		 1230 case VNIC_DEV_INTR_MODE_MSI:
1231 free_irq(enic->pdev->irq, enic);
1232 break;
01f2e4ea
SF		 1233 case VNIC_DEV_INTR_MODE_MSIX:
1234 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1235 if (enic->msix[i].requested)
1236 free_irq(enic->msix_entry[i].vector,
1237 enic->msix[i].devid);
1238 break;
1239 default:
1240 break;
1241 }
1242}
1243
1244static int enic_request_intr(struct enic *enic)
1245{
1246 struct net_device *netdev = enic->netdev;
1247 unsigned int i;
1248 int err = 0;
1249
1250 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1251
1252 case VNIC_DEV_INTR_MODE_INTX:
1253
1254 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1255 IRQF_SHARED, netdev->name, netdev);
1256 break;
1257
1258 case VNIC_DEV_INTR_MODE_MSI:
1259
1260 err = request_irq(enic->pdev->irq, enic_isr_msi,
1261 0, netdev->name, enic);
1262 break;
1263
1264 case VNIC_DEV_INTR_MODE_MSIX:
1265
1266 sprintf(enic->msix[ENIC_MSIX_RQ].devname,
8f4d248c 1267 "%.11s-rx-0", netdev->name);
01f2e4ea
SF		 1268 enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq;
1269 enic->msix[ENIC_MSIX_RQ].devid = enic;
1270
1271 sprintf(enic->msix[ENIC_MSIX_WQ].devname,
8f4d248c 1272 "%.11s-tx-0", netdev->name);
01f2e4ea
SF		 1273 enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq;
1274 enic->msix[ENIC_MSIX_WQ].devid = enic;
1275
1276 sprintf(enic->msix[ENIC_MSIX_ERR].devname,
1277 "%.11s-err", netdev->name);
1278 enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err;
1279 enic->msix[ENIC_MSIX_ERR].devid = enic;
1280
1281 sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname,
1282 "%.11s-notify", netdev->name);
1283 enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify;
1284 enic->msix[ENIC_MSIX_NOTIFY].devid = enic;
1285
1286 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) {
1287 err = request_irq(enic->msix_entry[i].vector,
1288 enic->msix[i].isr, 0,
1289 enic->msix[i].devname,
1290 enic->msix[i].devid);
1291 if (err) {
1292 enic_free_intr(enic);
1293 break;
1294 }
1295 enic->msix[i].requested = 1;
1296 }
1297
1298 break;
1299
1300 default:
1301 break;
1302 }
1303
1304 return err;
1305}
1306
1307static int enic_notify_set(struct enic *enic)
1308{
1309 int err;
1310
56ac88b3 1311 spin_lock(&enic->devcmd_lock);
01f2e4ea
SF		 1312 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1313 case VNIC_DEV_INTR_MODE_INTX:
1314 err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY);
1315 break;
1316 case VNIC_DEV_INTR_MODE_MSIX:
1317 err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY);
1318 break;
1319 default:
1320 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1321 break;
1322 }
56ac88b3 1323 spin_unlock(&enic->devcmd_lock);
01f2e4ea
SF		 1324
1325 return err;
1326}
1327
1328static void enic_notify_timer_start(struct enic *enic)
1329{
1330 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1331 case VNIC_DEV_INTR_MODE_MSI:
1332 mod_timer(&enic->notify_timer, jiffies);
1333 break;
1334 default:
1335 /* Using intr for notification for INTx/MSI-X */
1336 break;
1337 };
1338}
1339
1340/* rtnl lock is held, process context */
1341static int enic_open(struct net_device *netdev)
1342{
1343 struct enic *enic = netdev_priv(netdev);
1344 unsigned int i;
1345 int err;
1346
4b75a442
SF		 1347 err = enic_request_intr(enic);
1348 if (err) {
1349 printk(KERN_ERR PFX "%s: Unable to request irq.\n",
1350 netdev->name);
1351 return err;
1352 }
1353
1354 err = enic_notify_set(enic);
1355 if (err) {
1356 printk(KERN_ERR PFX
1357 "%s: Failed to alloc notify buffer, aborting.\n",
1358 netdev->name);
1359 goto err_out_free_intr;
1360 }
1361
01f2e4ea 1362 for (i = 0; i < enic->rq_count; i++) {
4badc385 1363 err = vnic_rq_fill(&enic->rq[i], enic->rq_alloc_buf);
01f2e4ea
SF		 1364 if (err) {
1365 printk(KERN_ERR PFX
1366 "%s: Unable to alloc receive buffers.\n",
1367 netdev->name);
4b75a442 1368 goto err_out_notify_unset;
01f2e4ea
SF		 1369 }
1370 }
1371
1372 for (i = 0; i < enic->wq_count; i++)
1373 vnic_wq_enable(&enic->wq[i]);
1374 for (i = 0; i < enic->rq_count; i++)
1375 vnic_rq_enable(&enic->rq[i]);
1376
56ac88b3 1377 spin_lock(&enic->devcmd_lock);
01f2e4ea 1378 enic_add_station_addr(enic);
56ac88b3 1379 spin_unlock(&enic->devcmd_lock);
01f2e4ea
SF		 1380 enic_set_multicast_list(netdev);
1381
1382 netif_wake_queue(netdev);
1383 napi_enable(&enic->napi);
56ac88b3 1384 spin_lock(&enic->devcmd_lock);
01f2e4ea 1385 vnic_dev_enable(enic->vdev);
56ac88b3 1386 spin_unlock(&enic->devcmd_lock);
01f2e4ea
SF		 1387
1388 for (i = 0; i < enic->intr_count; i++)
1389 vnic_intr_unmask(&enic->intr[i]);
1390
1391 enic_notify_timer_start(enic);
1392
1393 return 0;
4b75a442
SF		 1394
1395err_out_notify_unset:
56ac88b3 1396 spin_lock(&enic->devcmd_lock);
4b75a442 1397 vnic_dev_notify_unset(enic->vdev);
56ac88b3 1398 spin_unlock(&enic->devcmd_lock);
4b75a442
SF		 1399err_out_free_intr:
1400 enic_free_intr(enic);
1401
1402 return err;
01f2e4ea
SF		 1403}
1404
1405/* rtnl lock is held, process context */
1406static int enic_stop(struct net_device *netdev)
1407{
1408 struct enic *enic = netdev_priv(netdev);
1409 unsigned int i;
1410 int err;
1411
1412 del_timer_sync(&enic->notify_timer);
1413
56ac88b3 1414 spin_lock(&enic->devcmd_lock);
01f2e4ea 1415 vnic_dev_disable(enic->vdev);
56ac88b3 1416 spin_unlock(&enic->devcmd_lock);
01f2e4ea
SF		 1417 napi_disable(&enic->napi);
1418 netif_stop_queue(netdev);
1419
1420 for (i = 0; i < enic->intr_count; i++)
1421 vnic_intr_mask(&enic->intr[i]);
1422
1423 for (i = 0; i < enic->wq_count; i++) {
1424 err = vnic_wq_disable(&enic->wq[i]);
1425 if (err)
1426 return err;
1427 }
1428 for (i = 0; i < enic->rq_count; i++) {
1429 err = vnic_rq_disable(&enic->rq[i]);
1430 if (err)
1431 return err;
1432 }
1433
56ac88b3 1434 spin_lock(&enic->devcmd_lock);
4b75a442 1435 vnic_dev_notify_unset(enic->vdev);
56ac88b3 1436 spin_unlock(&enic->devcmd_lock);
4b75a442
SF		 1437 enic_free_intr(enic);
1438
01f2e4ea
SF		 1439 (void)vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1440 -1, enic_rq_service_drop, NULL);
1441 (void)vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1442 -1, enic_wq_service, NULL);
1443
1444 for (i = 0; i < enic->wq_count; i++)
1445 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1446 for (i = 0; i < enic->rq_count; i++)
1447 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1448 for (i = 0; i < enic->cq_count; i++)
1449 vnic_cq_clean(&enic->cq[i]);
1450 for (i = 0; i < enic->intr_count; i++)
1451 vnic_intr_clean(&enic->intr[i]);
1452
1453 return 0;
1454}
1455
1456static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1457{
1458 struct enic *enic = netdev_priv(netdev);
1459 int running = netif_running(netdev);
1460
25f0a061
SF		 1461 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1462 return -EINVAL;
1463
01f2e4ea
SF		 1464 if (running)
1465 enic_stop(netdev);
1466
01f2e4ea
SF		 1467 netdev->mtu = new_mtu;
1468
1469 if (netdev->mtu > enic->port_mtu)
1470 printk(KERN_WARNING PFX
1471 "%s: interface MTU (%d) set higher "
1472 "than port MTU (%d)\n",
1473 netdev->name, netdev->mtu, enic->port_mtu);
1474
1475 if (running)
1476 enic_open(netdev);
1477
1478 return 0;
1479}
1480
1481#ifdef CONFIG_NET_POLL_CONTROLLER
1482static void enic_poll_controller(struct net_device *netdev)
1483{
1484 struct enic *enic = netdev_priv(netdev);
1485 struct vnic_dev *vdev = enic->vdev;
1486
1487 switch (vnic_dev_get_intr_mode(vdev)) {
1488 case VNIC_DEV_INTR_MODE_MSIX:
1489 enic_isr_msix_rq(enic->pdev->irq, enic);
1490 enic_isr_msix_wq(enic->pdev->irq, enic);
1491 break;
1492 case VNIC_DEV_INTR_MODE_MSI:
1493 enic_isr_msi(enic->pdev->irq, enic);
1494 break;
1495 case VNIC_DEV_INTR_MODE_INTX:
1496 enic_isr_legacy(enic->pdev->irq, netdev);
1497 break;
1498 default:
1499 break;
1500 }
1501}
1502#endif
1503
1504static int enic_dev_wait(struct vnic_dev *vdev,
1505 int (*start)(struct vnic_dev *, int),
1506 int (*finished)(struct vnic_dev *, int *),
1507 int arg)
1508{
1509 unsigned long time;
1510 int done;
1511 int err;
1512
1513 BUG_ON(in_interrupt());
1514
1515 err = start(vdev, arg);
1516 if (err)
1517 return err;
1518
1519 /* Wait for func to complete...2 seconds max
1520 */
1521
1522 time = jiffies + (HZ * 2);
1523 do {
1524
1525 err = finished(vdev, &done);
1526 if (err)
1527 return err;
1528
1529 if (done)
1530 return 0;
1531
1532 schedule_timeout_uninterruptible(HZ / 10);
1533
1534 } while (time_after(time, jiffies));
1535
1536 return -ETIMEDOUT;
1537}
1538
1539static int enic_dev_open(struct enic *enic)
1540{
1541 int err;
1542
1543 err = enic_dev_wait(enic->vdev, vnic_dev_open,
1544 vnic_dev_open_done, 0);
1545 if (err)
1546 printk(KERN_ERR PFX
1547 "vNIC device open failed, err %d.\n", err);
1548
1549 return err;
1550}
1551
1552static int enic_dev_soft_reset(struct enic *enic)
1553{
1554 int err;
1555
1556 err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset,
1557 vnic_dev_soft_reset_done, 0);
1558 if (err)
1559 printk(KERN_ERR PFX
1560 "vNIC soft reset failed, err %d.\n", err);
1561
1562 return err;
1563}
1564
68f71708
SF		 1565static int enic_set_niccfg(struct enic *enic)
1566{
1567 const u8 rss_default_cpu = 0;
1568 const u8 rss_hash_type = 0;
1569 const u8 rss_hash_bits = 0;
1570 const u8 rss_base_cpu = 0;
1571 const u8 rss_enable = 0;
1572 const u8 tso_ipid_split_en = 0;
1573 const u8 ig_vlan_strip_en = 1;
1574
1575 /* Enable VLAN tag stripping. RSS not enabled (yet).
6ba9cdc0 1576 */
68f71708
SF		 1577
1578 return enic_set_nic_cfg(enic,
1579 rss_default_cpu, rss_hash_type,
1580 rss_hash_bits, rss_base_cpu,
1581 rss_enable, tso_ipid_split_en,
1582 ig_vlan_strip_en);
1583}
1584
01f2e4ea
SF		 1585static void enic_reset(struct work_struct *work)
1586{
1587 struct enic *enic = container_of(work, struct enic, reset);
1588
1589 if (!netif_running(enic->netdev))
1590 return;
1591
1592 rtnl_lock();
1593
1594 spin_lock(&enic->devcmd_lock);
1595 vnic_dev_hang_notify(enic->vdev);
1596 spin_unlock(&enic->devcmd_lock);
1597
1598 enic_stop(enic->netdev);
1599 enic_dev_soft_reset(enic);
68f71708 1600 vnic_dev_init(enic->vdev, 0);
01f2e4ea
SF		 1601 enic_reset_mcaddrs(enic);
1602 enic_init_vnic_resources(enic);
68f71708 1603 enic_set_niccfg(enic);
01f2e4ea
SF		 1604 enic_open(enic->netdev);
1605
1606 rtnl_unlock();
1607}
1608
1609static int enic_set_intr_mode(struct enic *enic)
1610{
6ba9cdc0
SF		 1611 unsigned int n = 1;
1612 unsigned int m = 1;
01f2e4ea
SF		 1613 unsigned int i;
1614
1615 /* Set interrupt mode (INTx, MSI, MSI-X) depending
1616 * system capabilities.
1617 *
1618 * Try MSI-X first
1619 *
1620 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1621 * (the second to last INTR is used for WQ/RQ errors)
1622 * (the last INTR is used for notifications)
1623 */
1624
1625 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
1626 for (i = 0; i < n + m + 2; i++)
1627 enic->msix_entry[i].entry = i;
1628
1629 if (enic->config.intr_mode < 1 &&
1630 enic->rq_count >= n &&
1631 enic->wq_count >= m &&
1632 enic->cq_count >= n + m &&
1633 enic->intr_count >= n + m + 2 &&
1634 !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
1635
1636 enic->rq_count = n;
1637 enic->wq_count = m;
1638 enic->cq_count = n + m;
1639 enic->intr_count = n + m + 2;
1640
1641 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX);
1642
1643 return 0;
1644 }
1645
1646 /* Next try MSI
1647 *
1648 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
1649 */
1650
1651 if (enic->config.intr_mode < 2 &&
1652 enic->rq_count >= 1 &&
1653 enic->wq_count >= 1 &&
1654 enic->cq_count >= 2 &&
1655 enic->intr_count >= 1 &&
1656 !pci_enable_msi(enic->pdev)) {
1657
1658 enic->rq_count = 1;
1659 enic->wq_count = 1;
1660 enic->cq_count = 2;
1661 enic->intr_count = 1;
1662
1663 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
1664
1665 return 0;
1666 }
1667
1668 /* Next try INTx
1669 *
1670 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
1671 * (the first INTR is used for WQ/RQ)
1672 * (the second INTR is used for WQ/RQ errors)
1673 * (the last INTR is used for notifications)
1674 */
1675
1676 if (enic->config.intr_mode < 3 &&
1677 enic->rq_count >= 1 &&
1678 enic->wq_count >= 1 &&
1679 enic->cq_count >= 2 &&
1680 enic->intr_count >= 3) {
1681
1682 enic->rq_count = 1;
1683 enic->wq_count = 1;
1684 enic->cq_count = 2;
1685 enic->intr_count = 3;
1686
1687 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
1688
1689 return 0;
1690 }
1691
1692 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1693
1694 return -EINVAL;
1695}
1696
1697static void enic_clear_intr_mode(struct enic *enic)
1698{
1699 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1700 case VNIC_DEV_INTR_MODE_MSIX:
1701 pci_disable_msix(enic->pdev);
1702 break;
1703 case VNIC_DEV_INTR_MODE_MSI:
1704 pci_disable_msi(enic->pdev);
1705 break;
1706 default:
1707 break;
1708 }
1709
1710 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
1711}
1712
afe29f7a
SH		 1713static const struct net_device_ops enic_netdev_ops = {
1714 .ndo_open = enic_open,
1715 .ndo_stop = enic_stop,
00829823 1716 .ndo_start_xmit = enic_hard_start_xmit,
afe29f7a
SH		 1717 .ndo_get_stats = enic_get_stats,
1718 .ndo_validate_addr = eth_validate_addr,
fe96aaa1 1719 .ndo_set_mac_address = eth_mac_addr,
afe29f7a
SH		 1720 .ndo_set_multicast_list = enic_set_multicast_list,
1721 .ndo_change_mtu = enic_change_mtu,
1722 .ndo_vlan_rx_register = enic_vlan_rx_register,
1723 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
1724 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
1725 .ndo_tx_timeout = enic_tx_timeout,
1726#ifdef CONFIG_NET_POLL_CONTROLLER
1727 .ndo_poll_controller = enic_poll_controller,
1728#endif
1729};
1730
6fdfa970
SF		 1731void enic_dev_deinit(struct enic *enic)
1732{
1733 netif_napi_del(&enic->napi);
1734 enic_free_vnic_resources(enic);
1735 enic_clear_intr_mode(enic);
1736}
1737
1738int enic_dev_init(struct enic *enic)
1739{
1740 struct net_device *netdev = enic->netdev;
1741 int err;
1742
1743 /* Get vNIC configuration
1744 */
1745
1746 err = enic_get_vnic_config(enic);
1747 if (err) {
1748 printk(KERN_ERR PFX
1749 "Get vNIC configuration failed, aborting.\n");
1750 return err;
1751 }
1752
1753 /* Get available resource counts
1754 */
1755
1756 enic_get_res_counts(enic);
1757
1758 /* Set interrupt mode based on resource counts and system
1759 * capabilities
1760 */
1761
1762 err = enic_set_intr_mode(enic);
1763 if (err) {
1764 printk(KERN_ERR PFX
1765 "Failed to set intr mode, aborting.\n");
1766 return err;
1767 }
1768
1769 /* Allocate and configure vNIC resources
1770 */
1771
1772 err = enic_alloc_vnic_resources(enic);
1773 if (err) {
1774 printk(KERN_ERR PFX
1775 "Failed to alloc vNIC resources, aborting.\n");
1776 goto err_out_free_vnic_resources;
1777 }
1778
1779 enic_init_vnic_resources(enic);
1780
1781 err = enic_set_rq_alloc_buf(enic);
1782 if (err) {
1783 printk(KERN_ERR PFX
1784 "Failed to set RQ buffer allocator, aborting.\n");
1785 goto err_out_free_vnic_resources;
1786 }
1787
1788 err = enic_set_niccfg(enic);
1789 if (err) {
1790 printk(KERN_ERR PFX
1791 "Failed to config nic, aborting.\n");
1792 goto err_out_free_vnic_resources;
1793 }
1794
1795 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1796 default:
1797 netif_napi_add(netdev, &enic->napi, enic_poll, 64);
1798 break;
1799 case VNIC_DEV_INTR_MODE_MSIX:
1800 netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64);
1801 break;
1802 }
1803
1804 return 0;
1805
1806err_out_free_vnic_resources:
1807 enic_clear_intr_mode(enic);
1808 enic_free_vnic_resources(enic);
1809
1810 return err;
1811}
1812
27e6c7d3
SF		 1813static void enic_iounmap(struct enic *enic)
1814{
1815 unsigned int i;
1816
1817 for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
1818 if (enic->bar[i].vaddr)
1819 iounmap(enic->bar[i].vaddr);
1820}
1821
01f2e4ea
SF		 1822static int __devinit enic_probe(struct pci_dev *pdev,
1823 const struct pci_device_id *ent)
1824{
1825 struct net_device *netdev;
1826 struct enic *enic;
1827 int using_dac = 0;
1828 unsigned int i;
1829 int err;
1830
01f2e4ea
SF		 1831 /* Allocate net device structure and initialize. Private
1832 * instance data is initialized to zero.
1833 */
1834
1835 netdev = alloc_etherdev(sizeof(struct enic));
1836 if (!netdev) {
1837 printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
1838 return -ENOMEM;
1839 }
1840
01f2e4ea
SF		 1841 pci_set_drvdata(pdev, netdev);
1842
1843 SET_NETDEV_DEV(netdev, &pdev->dev);
1844
1845 enic = netdev_priv(netdev);
1846 enic->netdev = netdev;
1847 enic->pdev = pdev;
1848
1849 /* Setup PCI resources
1850 */
1851
1852 err = pci_enable_device(pdev);
1853 if (err) {
1854 printk(KERN_ERR PFX
4b75a442 1855 "Cannot enable PCI device, aborting.\n");
01f2e4ea
SF		 1856 goto err_out_free_netdev;
1857 }
1858
1859 err = pci_request_regions(pdev, DRV_NAME);
1860 if (err) {
1861 printk(KERN_ERR PFX
4b75a442 1862 "Cannot request PCI regions, aborting.\n");
01f2e4ea
SF		 1863 goto err_out_disable_device;
1864 }
1865
1866 pci_set_master(pdev);
1867
1868 /* Query PCI controller on system for DMA addressing
1869 * limitation for the device. Try 40-bit first, and
1870 * fail to 32-bit.
1871 */
1872
50cf156a 1873 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
01f2e4ea 1874 if (err) {
284901a9 1875 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
01f2e4ea
SF		 1876 if (err) {
1877 printk(KERN_ERR PFX
4b75a442 1878 "No usable DMA configuration, aborting.\n");
01f2e4ea
SF		 1879 goto err_out_release_regions;
1880 }
284901a9 1881 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
01f2e4ea
SF		 1882 if (err) {
1883 printk(KERN_ERR PFX
4b75a442
SF		 1884 "Unable to obtain 32-bit DMA "
1885 "for consistent allocations, aborting.\n");
01f2e4ea
SF		 1886 goto err_out_release_regions;
1887 }
1888 } else {
50cf156a 1889 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
01f2e4ea
SF		 1890 if (err) {
1891 printk(KERN_ERR PFX
4b75a442
SF		 1892 "Unable to obtain 40-bit DMA "
1893 "for consistent allocations, aborting.\n");
01f2e4ea
SF		 1894 goto err_out_release_regions;
1895 }
1896 using_dac = 1;
1897 }
1898
27e6c7d3 1899 /* Map vNIC resources from BAR0-5
01f2e4ea
SF		 1900 */
1901
27e6c7d3
SF		 1902 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
1903 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
1904 continue;
1905 enic->bar[i].len = pci_resource_len(pdev, i);
1906 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
1907 if (!enic->bar[i].vaddr) {
1908 printk(KERN_ERR PFX
1909 "Cannot memory-map BAR %d, aborting.\n", i);
1910 err = -ENODEV;
1911 goto err_out_iounmap;
1912 }
1913 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
01f2e4ea
SF		 1914 }
1915
1916 /* Register vNIC device
1917 */
1918
27e6c7d3
SF		 1919 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
1920 ARRAY_SIZE(enic->bar));
01f2e4ea
SF		 1921 if (!enic->vdev) {
1922 printk(KERN_ERR PFX
4b75a442 1923 "vNIC registration failed, aborting.\n");
01f2e4ea
SF		 1924 err = -ENODEV;
1925 goto err_out_iounmap;
1926 }
1927
1928 /* Issue device open to get device in known state
1929 */
1930
1931 err = enic_dev_open(enic);
1932 if (err) {
1933 printk(KERN_ERR PFX
4b75a442 1934 "vNIC dev open failed, aborting.\n");
01f2e4ea
SF		 1935 goto err_out_vnic_unregister;
1936 }
1937
1938 /* Issue device init to initialize the vnic-to-switch link.
1939 * We'll start with carrier off and wait for link UP
1940 * notification later to turn on carrier. We don't need
1941 * to wait here for the vnic-to-switch link initialization
1942 * to complete; link UP notification is the indication that
1943 * the process is complete.
1944 */
1945
1946 netif_carrier_off(netdev);
1947
1948 err = vnic_dev_init(enic->vdev, 0);
1949 if (err) {
1950 printk(KERN_ERR PFX
4b75a442 1951 "vNIC dev init failed, aborting.\n");
01f2e4ea
SF		 1952 goto err_out_dev_close;
1953 }
1954
6fdfa970 1955 err = enic_dev_init(enic);
01f2e4ea
SF		 1956 if (err) {
1957 printk(KERN_ERR PFX
6fdfa970 1958 "Device initialization failed, aborting.\n");
01f2e4ea
SF		 1959 goto err_out_dev_close;
1960 }
1961
01f2e4ea
SF		 1962 /* Setup notification timer, HW reset task, and locks
1963 */
1964
1965 init_timer(&enic->notify_timer);
1966 enic->notify_timer.function = enic_notify_timer;
1967 enic->notify_timer.data = (unsigned long)enic;
1968
1969 INIT_WORK(&enic->reset, enic_reset);
1970
1971 for (i = 0; i < enic->wq_count; i++)
1972 spin_lock_init(&enic->wq_lock[i]);
1973
1974 spin_lock_init(&enic->devcmd_lock);
1975
1976 /* Register net device
1977 */
1978
1979 enic->port_mtu = enic->config.mtu;
1980 (void)enic_change_mtu(netdev, enic->port_mtu);
1981
1982 err = enic_set_mac_addr(netdev, enic->mac_addr);
1983 if (err) {
1984 printk(KERN_ERR PFX
4b75a442 1985 "Invalid MAC address, aborting.\n");
6fdfa970 1986 goto err_out_dev_deinit;
01f2e4ea
SF		 1987 }
1988
afe29f7a 1989 netdev->netdev_ops = &enic_netdev_ops;
01f2e4ea
SF		 1990 netdev->watchdog_timeo = 2 * HZ;
1991 netdev->ethtool_ops = &enic_ethtool_ops;
01f2e4ea 1992
9f63a7c6
SF		 1993 netdev->features |= NETIF_F_HW_VLAN_TX |
1994 NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_FILTER;
01f2e4ea
SF		 1995 if (ENIC_SETTING(enic, TXCSUM))
1996 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
1997 if (ENIC_SETTING(enic, TSO))
1998 netdev->features |= NETIF_F_TSO |
1999 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
86ca9db7
SF		 2000 if (ENIC_SETTING(enic, LRO))
2001 netdev->features |= NETIF_F_LRO;
01f2e4ea
SF		 2002 if (using_dac)
2003 netdev->features |= NETIF_F_HIGHDMA;
2004
01f2e4ea
SF		 2005 enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
2006
86ca9db7
SF		 2007 enic->lro_mgr.max_aggr = ENIC_LRO_MAX_AGGR;
2008 enic->lro_mgr.max_desc = ENIC_LRO_MAX_DESC;
2009 enic->lro_mgr.lro_arr = enic->lro_desc;
2010 enic->lro_mgr.get_skb_header = enic_get_skb_header;
2011 enic->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
2012 enic->lro_mgr.dev = netdev;
2013 enic->lro_mgr.ip_summed = CHECKSUM_COMPLETE;
2014 enic->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
2015
01f2e4ea
SF		 2016 err = register_netdev(netdev);
2017 if (err) {
2018 printk(KERN_ERR PFX
4b75a442 2019 "Cannot register net device, aborting.\n");
6fdfa970 2020 goto err_out_dev_deinit;
01f2e4ea
SF		 2021 }
2022
2023 return 0;
2024
6fdfa970
SF		 2025err_out_dev_deinit:
2026 enic_dev_deinit(enic);
01f2e4ea
SF		 2027err_out_dev_close:
2028 vnic_dev_close(enic->vdev);
2029err_out_vnic_unregister:
01f2e4ea
SF		 2030 vnic_dev_unregister(enic->vdev);
2031err_out_iounmap:
2032 enic_iounmap(enic);
2033err_out_release_regions:
2034 pci_release_regions(pdev);
2035err_out_disable_device:
2036 pci_disable_device(pdev);
2037err_out_free_netdev:
2038 pci_set_drvdata(pdev, NULL);
2039 free_netdev(netdev);
2040
2041 return err;
2042}
2043
2044static void __devexit enic_remove(struct pci_dev *pdev)
2045{
2046 struct net_device *netdev = pci_get_drvdata(pdev);
2047
2048 if (netdev) {
2049 struct enic *enic = netdev_priv(netdev);
2050
2051 flush_scheduled_work();
2052 unregister_netdev(netdev);
6fdfa970 2053 enic_dev_deinit(enic);
01f2e4ea 2054 vnic_dev_close(enic->vdev);
01f2e4ea
SF		 2055 vnic_dev_unregister(enic->vdev);
2056 enic_iounmap(enic);
2057 pci_release_regions(pdev);
2058 pci_disable_device(pdev);
2059 pci_set_drvdata(pdev, NULL);
2060 free_netdev(netdev);
2061 }
2062}
2063
2064static struct pci_driver enic_driver = {
2065 .name = DRV_NAME,
2066 .id_table = enic_id_table,
2067 .probe = enic_probe,
2068 .remove = __devexit_p(enic_remove),
2069};
2070
2071static int __init enic_init_module(void)
2072{
2073 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2074
2075 return pci_register_driver(&enic_driver);
2076}
2077
2078static void __exit enic_cleanup_module(void)
2079{
2080 pci_unregister_driver(&enic_driver);
2081}
2082
2083module_init(enic_init_module);
2084module_exit(enic_cleanup_module);
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