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enic: update to support 64 bit stats
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / net / enic / enic_main.c
blobc7797ecd90d9f55e6578d8b01ab46b3b21db4ead
1 /*
2 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 *
18 */
19
20 #include <linux/module.h>
21 #include <linux/kernel.h>
22 #include <linux/string.h>
23 #include <linux/errno.h>
24 #include <linux/types.h>
25 #include <linux/init.h>
26 #include <linux/interrupt.h>
27 #include <linux/workqueue.h>
28 #include <linux/pci.h>
29 #include <linux/netdevice.h>
30 #include <linux/etherdevice.h>
31 #include <linux/if_ether.h>
32 #include <linux/if_vlan.h>
33 #include <linux/ethtool.h>
34 #include <linux/in.h>
35 #include <linux/ip.h>
36 #include <linux/ipv6.h>
37 #include <linux/tcp.h>
38 #include <linux/rtnetlink.h>
39 #include <linux/prefetch.h>
40 #include <net/ip6_checksum.h>
41
42 #include "cq_enet_desc.h"
43 #include "vnic_dev.h"
44 #include "vnic_intr.h"
45 #include "vnic_stats.h"
46 #include "vnic_vic.h"
47 #include "enic_res.h"
48 #include "enic.h"
49 #include "enic_dev.h"
50 #include "enic_pp.h"
51
52 #define ENIC_NOTIFY_TIMER_PERIOD (2 * HZ)
53 #define WQ_ENET_MAX_DESC_LEN (1 << WQ_ENET_LEN_BITS)
54 #define MAX_TSO (1 << 16)
55 #define ENIC_DESC_MAX_SPLITS (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
56
57 #define PCI_DEVICE_ID_CISCO_VIC_ENET 0x0043 /* ethernet vnic */
58 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN 0x0044 /* enet dynamic vnic */
59
60 /* Supported devices */
61 static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
62 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
63 { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
64 { 0, } /* end of table */
65 };
66
67 MODULE_DESCRIPTION(DRV_DESCRIPTION);
68 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
69 MODULE_LICENSE("GPL");
70 MODULE_VERSION(DRV_VERSION);
71 MODULE_DEVICE_TABLE(pci, enic_id_table);
72
73 struct enic_stat {
74 char name[ETH_GSTRING_LEN];
75 unsigned int offset;
76 };
77
78 #define ENIC_TX_STAT(stat) \
79 { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
80 #define ENIC_RX_STAT(stat) \
81 { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
82
83 static const struct enic_stat enic_tx_stats[] = {
84 ENIC_TX_STAT(tx_frames_ok),
85 ENIC_TX_STAT(tx_unicast_frames_ok),
86 ENIC_TX_STAT(tx_multicast_frames_ok),
87 ENIC_TX_STAT(tx_broadcast_frames_ok),
88 ENIC_TX_STAT(tx_bytes_ok),
89 ENIC_TX_STAT(tx_unicast_bytes_ok),
90 ENIC_TX_STAT(tx_multicast_bytes_ok),
91 ENIC_TX_STAT(tx_broadcast_bytes_ok),
92 ENIC_TX_STAT(tx_drops),
93 ENIC_TX_STAT(tx_errors),
94 ENIC_TX_STAT(tx_tso),
95 };
96
97 static const struct enic_stat enic_rx_stats[] = {
98 ENIC_RX_STAT(rx_frames_ok),
99 ENIC_RX_STAT(rx_frames_total),
100 ENIC_RX_STAT(rx_unicast_frames_ok),
101 ENIC_RX_STAT(rx_multicast_frames_ok),
102 ENIC_RX_STAT(rx_broadcast_frames_ok),
103 ENIC_RX_STAT(rx_bytes_ok),
104 ENIC_RX_STAT(rx_unicast_bytes_ok),
105 ENIC_RX_STAT(rx_multicast_bytes_ok),
106 ENIC_RX_STAT(rx_broadcast_bytes_ok),
107 ENIC_RX_STAT(rx_drop),
108 ENIC_RX_STAT(rx_no_bufs),
109 ENIC_RX_STAT(rx_errors),
110 ENIC_RX_STAT(rx_rss),
111 ENIC_RX_STAT(rx_crc_errors),
112 ENIC_RX_STAT(rx_frames_64),
113 ENIC_RX_STAT(rx_frames_127),
114 ENIC_RX_STAT(rx_frames_255),
115 ENIC_RX_STAT(rx_frames_511),
116 ENIC_RX_STAT(rx_frames_1023),
117 ENIC_RX_STAT(rx_frames_1518),
118 ENIC_RX_STAT(rx_frames_to_max),
119 };
120
121 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
122 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
123
124 static int enic_is_dynamic(struct enic *enic)
125 {
126 return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
127 }
128
129 static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
130 {
131 return rq;
132 }
133
134 static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
135 {
136 return enic->rq_count + wq;
137 }
138
139 static inline unsigned int enic_legacy_io_intr(void)
140 {
141 return 0;
142 }
143
144 static inline unsigned int enic_legacy_err_intr(void)
145 {
146 return 1;
147 }
148
149 static inline unsigned int enic_legacy_notify_intr(void)
150 {
151 return 2;
152 }
153
154 static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq)
155 {
156 return rq;
157 }
158
159 static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq)
160 {
161 return enic->rq_count + wq;
162 }
163
164 static inline unsigned int enic_msix_err_intr(struct enic *enic)
165 {
166 return enic->rq_count + enic->wq_count;
167 }
168
169 static inline unsigned int enic_msix_notify_intr(struct enic *enic)
170 {
171 return enic->rq_count + enic->wq_count + 1;
172 }
173
174 static int enic_get_settings(struct net_device *netdev,
175 struct ethtool_cmd *ecmd)
176 {
177 struct enic *enic = netdev_priv(netdev);
178
179 ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
180 ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
181 ecmd->port = PORT_FIBRE;
182 ecmd->transceiver = XCVR_EXTERNAL;
183
184 if (netif_carrier_ok(netdev)) {
185 ethtool_cmd_speed_set(ecmd, vnic_dev_port_speed(enic->vdev));
186 ecmd->duplex = DUPLEX_FULL;
187 } else {
188 ethtool_cmd_speed_set(ecmd, -1);
189 ecmd->duplex = -1;
190 }
191
192 ecmd->autoneg = AUTONEG_DISABLE;
193
194 return 0;
195 }
196
197 static void enic_get_drvinfo(struct net_device *netdev,
198 struct ethtool_drvinfo *drvinfo)
199 {
200 struct enic *enic = netdev_priv(netdev);
201 struct vnic_devcmd_fw_info *fw_info;
202
203 enic_dev_fw_info(enic, &fw_info);
204
205 strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
206 strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
207 strncpy(drvinfo->fw_version, fw_info->fw_version,
208 sizeof(drvinfo->fw_version));
209 strncpy(drvinfo->bus_info, pci_name(enic->pdev),
210 sizeof(drvinfo->bus_info));
211 }
212
213 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
214 {
215 unsigned int i;
216
217 switch (stringset) {
218 case ETH_SS_STATS:
219 for (i = 0; i < enic_n_tx_stats; i++) {
220 memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
221 data += ETH_GSTRING_LEN;
222 }
223 for (i = 0; i < enic_n_rx_stats; i++) {
224 memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
225 data += ETH_GSTRING_LEN;
226 }
227 break;
228 }
229 }
230
231 static int enic_get_sset_count(struct net_device *netdev, int sset)
232 {
233 switch (sset) {
234 case ETH_SS_STATS:
235 return enic_n_tx_stats + enic_n_rx_stats;
236 default:
237 return -EOPNOTSUPP;
238 }
239 }
240
241 static void enic_get_ethtool_stats(struct net_device *netdev,
242 struct ethtool_stats *stats, u64 *data)
243 {
244 struct enic *enic = netdev_priv(netdev);
245 struct vnic_stats *vstats;
246 unsigned int i;
247
248 enic_dev_stats_dump(enic, &vstats);
249
250 for (i = 0; i < enic_n_tx_stats; i++)
251 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
252 for (i = 0; i < enic_n_rx_stats; i++)
253 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
254 }
255
256 static u32 enic_get_msglevel(struct net_device *netdev)
257 {
258 struct enic *enic = netdev_priv(netdev);
259 return enic->msg_enable;
260 }
261
262 static void enic_set_msglevel(struct net_device *netdev, u32 value)
263 {
264 struct enic *enic = netdev_priv(netdev);
265 enic->msg_enable = value;
266 }
267
268 static int enic_get_coalesce(struct net_device *netdev,
269 struct ethtool_coalesce *ecmd)
270 {
271 struct enic *enic = netdev_priv(netdev);
272
273 ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
274 ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
275
276 return 0;
277 }
278
279 static int enic_set_coalesce(struct net_device *netdev,
280 struct ethtool_coalesce *ecmd)
281 {
282 struct enic *enic = netdev_priv(netdev);
283 u32 tx_coalesce_usecs;
284 u32 rx_coalesce_usecs;
285 unsigned int i, intr;
286
287 tx_coalesce_usecs = min_t(u32,
288 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
289 ecmd->tx_coalesce_usecs);
290 rx_coalesce_usecs = min_t(u32,
291 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
292 ecmd->rx_coalesce_usecs);
293
294 switch (vnic_dev_get_intr_mode(enic->vdev)) {
295 case VNIC_DEV_INTR_MODE_INTX:
296 if (tx_coalesce_usecs != rx_coalesce_usecs)
297 return -EINVAL;
298
299 intr = enic_legacy_io_intr();
300 vnic_intr_coalescing_timer_set(&enic->intr[intr],
301 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
302 break;
303 case VNIC_DEV_INTR_MODE_MSI:
304 if (tx_coalesce_usecs != rx_coalesce_usecs)
305 return -EINVAL;
306
307 vnic_intr_coalescing_timer_set(&enic->intr[0],
308 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
309 break;
310 case VNIC_DEV_INTR_MODE_MSIX:
311 for (i = 0; i < enic->wq_count; i++) {
312 intr = enic_msix_wq_intr(enic, i);
313 vnic_intr_coalescing_timer_set(&enic->intr[intr],
314 INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
315 }
316
317 for (i = 0; i < enic->rq_count; i++) {
318 intr = enic_msix_rq_intr(enic, i);
319 vnic_intr_coalescing_timer_set(&enic->intr[intr],
320 INTR_COALESCE_USEC_TO_HW(rx_coalesce_usecs));
321 }
322
323 break;
324 default:
325 break;
326 }
327
328 enic->tx_coalesce_usecs = tx_coalesce_usecs;
329 enic->rx_coalesce_usecs = rx_coalesce_usecs;
330
331 return 0;
332 }
333
334 static const struct ethtool_ops enic_ethtool_ops = {
335 .get_settings = enic_get_settings,
336 .get_drvinfo = enic_get_drvinfo,
337 .get_msglevel = enic_get_msglevel,
338 .set_msglevel = enic_set_msglevel,
339 .get_link = ethtool_op_get_link,
340 .get_strings = enic_get_strings,
341 .get_sset_count = enic_get_sset_count,
342 .get_ethtool_stats = enic_get_ethtool_stats,
343 .get_coalesce = enic_get_coalesce,
344 .set_coalesce = enic_set_coalesce,
345 };
346
347 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
348 {
349 struct enic *enic = vnic_dev_priv(wq->vdev);
350
351 if (buf->sop)
352 pci_unmap_single(enic->pdev, buf->dma_addr,
353 buf->len, PCI_DMA_TODEVICE);
354 else
355 pci_unmap_page(enic->pdev, buf->dma_addr,
356 buf->len, PCI_DMA_TODEVICE);
357
358 if (buf->os_buf)
359 dev_kfree_skb_any(buf->os_buf);
360 }
361
362 static void enic_wq_free_buf(struct vnic_wq *wq,
363 struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
364 {
365 enic_free_wq_buf(wq, buf);
366 }
367
368 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
369 u8 type, u16 q_number, u16 completed_index, void *opaque)
370 {
371 struct enic *enic = vnic_dev_priv(vdev);
372
373 spin_lock(&enic->wq_lock[q_number]);
374
375 vnic_wq_service(&enic->wq[q_number], cq_desc,
376 completed_index, enic_wq_free_buf,
377 opaque);
378
379 if (netif_queue_stopped(enic->netdev) &&
380 vnic_wq_desc_avail(&enic->wq[q_number]) >=
381 (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
382 netif_wake_queue(enic->netdev);
383
384 spin_unlock(&enic->wq_lock[q_number]);
385
386 return 0;
387 }
388
389 static void enic_log_q_error(struct enic *enic)
390 {
391 unsigned int i;
392 u32 error_status;
393
394 for (i = 0; i < enic->wq_count; i++) {
395 error_status = vnic_wq_error_status(&enic->wq[i]);
396 if (error_status)
397 netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
398 i, error_status);
399 }
400
401 for (i = 0; i < enic->rq_count; i++) {
402 error_status = vnic_rq_error_status(&enic->rq[i]);
403 if (error_status)
404 netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
405 i, error_status);
406 }
407 }
408
409 static void enic_msglvl_check(struct enic *enic)
410 {
411 u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
412
413 if (msg_enable != enic->msg_enable) {
414 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
415 enic->msg_enable, msg_enable);
416 enic->msg_enable = msg_enable;
417 }
418 }
419
420 static void enic_mtu_check(struct enic *enic)
421 {
422 u32 mtu = vnic_dev_mtu(enic->vdev);
423 struct net_device *netdev = enic->netdev;
424
425 if (mtu && mtu != enic->port_mtu) {
426 enic->port_mtu = mtu;
427 if (enic_is_dynamic(enic)) {
428 mtu = max_t(int, ENIC_MIN_MTU,
429 min_t(int, ENIC_MAX_MTU, mtu));
430 if (mtu != netdev->mtu)
431 schedule_work(&enic->change_mtu_work);
432 } else {
433 if (mtu < netdev->mtu)
434 netdev_warn(netdev,
435 "interface MTU (%d) set higher "
436 "than switch port MTU (%d)\n",
437 netdev->mtu, mtu);
438 }
439 }
440 }
441
442 static void enic_link_check(struct enic *enic)
443 {
444 int link_status = vnic_dev_link_status(enic->vdev);
445 int carrier_ok = netif_carrier_ok(enic->netdev);
446
447 if (link_status && !carrier_ok) {
448 netdev_info(enic->netdev, "Link UP\n");
449 netif_carrier_on(enic->netdev);
450 } else if (!link_status && carrier_ok) {
451 netdev_info(enic->netdev, "Link DOWN\n");
452 netif_carrier_off(enic->netdev);
453 }
454 }
455
456 static void enic_notify_check(struct enic *enic)
457 {
458 enic_msglvl_check(enic);
459 enic_mtu_check(enic);
460 enic_link_check(enic);
461 }
462
463 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
464
465 static irqreturn_t enic_isr_legacy(int irq, void *data)
466 {
467 struct net_device *netdev = data;
468 struct enic *enic = netdev_priv(netdev);
469 unsigned int io_intr = enic_legacy_io_intr();
470 unsigned int err_intr = enic_legacy_err_intr();
471 unsigned int notify_intr = enic_legacy_notify_intr();
472 u32 pba;
473
474 vnic_intr_mask(&enic->intr[io_intr]);
475
476 pba = vnic_intr_legacy_pba(enic->legacy_pba);
477 if (!pba) {
478 vnic_intr_unmask(&enic->intr[io_intr]);
479 return IRQ_NONE; /* not our interrupt */
480 }
481
482 if (ENIC_TEST_INTR(pba, notify_intr)) {
483 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
484 enic_notify_check(enic);
485 }
486
487 if (ENIC_TEST_INTR(pba, err_intr)) {
488 vnic_intr_return_all_credits(&enic->intr[err_intr]);
489 enic_log_q_error(enic);
490 /* schedule recovery from WQ/RQ error */
491 schedule_work(&enic->reset);
492 return IRQ_HANDLED;
493 }
494
495 if (ENIC_TEST_INTR(pba, io_intr)) {
496 if (napi_schedule_prep(&enic->napi[0]))
497 __napi_schedule(&enic->napi[0]);
498 } else {
499 vnic_intr_unmask(&enic->intr[io_intr]);
500 }
501
502 return IRQ_HANDLED;
503 }
504
505 static irqreturn_t enic_isr_msi(int irq, void *data)
506 {
507 struct enic *enic = data;
508
509 /* With MSI, there is no sharing of interrupts, so this is
510 * our interrupt and there is no need to ack it. The device
511 * is not providing per-vector masking, so the OS will not
512 * write to PCI config space to mask/unmask the interrupt.
513 * We're using mask_on_assertion for MSI, so the device
514 * automatically masks the interrupt when the interrupt is
515 * generated. Later, when exiting polling, the interrupt
516 * will be unmasked (see enic_poll).
517 *
518 * Also, the device uses the same PCIe Traffic Class (TC)
519 * for Memory Write data and MSI, so there are no ordering
520 * issues; the MSI will always arrive at the Root Complex
521 * _after_ corresponding Memory Writes (i.e. descriptor
522 * writes).
523 */
524
525 napi_schedule(&enic->napi[0]);
526
527 return IRQ_HANDLED;
528 }
529
530 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
531 {
532 struct napi_struct *napi = data;
533
534 /* schedule NAPI polling for RQ cleanup */
535 napi_schedule(napi);
536
537 return IRQ_HANDLED;
538 }
539
540 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
541 {
542 struct enic *enic = data;
543 unsigned int cq = enic_cq_wq(enic, 0);
544 unsigned int intr = enic_msix_wq_intr(enic, 0);
545 unsigned int wq_work_to_do = -1; /* no limit */
546 unsigned int wq_work_done;
547
548 wq_work_done = vnic_cq_service(&enic->cq[cq],
549 wq_work_to_do, enic_wq_service, NULL);
550
551 vnic_intr_return_credits(&enic->intr[intr],
552 wq_work_done,
553 1 /* unmask intr */,
554 1 /* reset intr timer */);
555
556 return IRQ_HANDLED;
557 }
558
559 static irqreturn_t enic_isr_msix_err(int irq, void *data)
560 {
561 struct enic *enic = data;
562 unsigned int intr = enic_msix_err_intr(enic);
563
564 vnic_intr_return_all_credits(&enic->intr[intr]);
565
566 enic_log_q_error(enic);
567
568 /* schedule recovery from WQ/RQ error */
569 schedule_work(&enic->reset);
570
571 return IRQ_HANDLED;
572 }
573
574 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
575 {
576 struct enic *enic = data;
577 unsigned int intr = enic_msix_notify_intr(enic);
578
579 vnic_intr_return_all_credits(&enic->intr[intr]);
580 enic_notify_check(enic);
581
582 return IRQ_HANDLED;
583 }
584
585 static inline void enic_queue_wq_skb_cont(struct enic *enic,
586 struct vnic_wq *wq, struct sk_buff *skb,
587 unsigned int len_left, int loopback)
588 {
589 skb_frag_t *frag;
590
591 /* Queue additional data fragments */
592 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
593 len_left -= frag->size;
594 enic_queue_wq_desc_cont(wq, skb,
595 pci_map_page(enic->pdev, frag->page,
596 frag->page_offset, frag->size,
597 PCI_DMA_TODEVICE),
598 frag->size,
599 (len_left == 0), /* EOP? */
600 loopback);
601 }
602 }
603
604 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
605 struct vnic_wq *wq, struct sk_buff *skb,
606 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
607 {
608 unsigned int head_len = skb_headlen(skb);
609 unsigned int len_left = skb->len - head_len;
610 int eop = (len_left == 0);
611
612 /* Queue the main skb fragment. The fragments are no larger
613 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
614 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
615 * per fragment is queued.
616 */
617 enic_queue_wq_desc(wq, skb,
618 pci_map_single(enic->pdev, skb->data,
619 head_len, PCI_DMA_TODEVICE),
620 head_len,
621 vlan_tag_insert, vlan_tag,
622 eop, loopback);
623
624 if (!eop)
625 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
626 }
627
628 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
629 struct vnic_wq *wq, struct sk_buff *skb,
630 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
631 {
632 unsigned int head_len = skb_headlen(skb);
633 unsigned int len_left = skb->len - head_len;
634 unsigned int hdr_len = skb_checksum_start_offset(skb);
635 unsigned int csum_offset = hdr_len + skb->csum_offset;
636 int eop = (len_left == 0);
637
638 /* Queue the main skb fragment. The fragments are no larger
639 * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
640 * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
641 * per fragment is queued.
642 */
643 enic_queue_wq_desc_csum_l4(wq, skb,
644 pci_map_single(enic->pdev, skb->data,
645 head_len, PCI_DMA_TODEVICE),
646 head_len,
647 csum_offset,
648 hdr_len,
649 vlan_tag_insert, vlan_tag,
650 eop, loopback);
651
652 if (!eop)
653 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
654 }
655
656 static inline void enic_queue_wq_skb_tso(struct enic *enic,
657 struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
658 int vlan_tag_insert, unsigned int vlan_tag, int loopback)
659 {
660 unsigned int frag_len_left = skb_headlen(skb);
661 unsigned int len_left = skb->len - frag_len_left;
662 unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
663 int eop = (len_left == 0);
664 unsigned int len;
665 dma_addr_t dma_addr;
666 unsigned int offset = 0;
667 skb_frag_t *frag;
668
669 /* Preload TCP csum field with IP pseudo hdr calculated
670 * with IP length set to zero. HW will later add in length
671 * to each TCP segment resulting from the TSO.
672 */
673
674 if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
675 ip_hdr(skb)->check = 0;
676 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
677 ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
678 } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
679 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
680 &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
681 }
682
683 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
684 * for the main skb fragment
685 */
686 while (frag_len_left) {
687 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
688 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
689 len, PCI_DMA_TODEVICE);
690 enic_queue_wq_desc_tso(wq, skb,
691 dma_addr,
692 len,
693 mss, hdr_len,
694 vlan_tag_insert, vlan_tag,
695 eop && (len == frag_len_left), loopback);
696 frag_len_left -= len;
697 offset += len;
698 }
699
700 if (eop)
701 return;
702
703 /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
704 * for additional data fragments
705 */
706 for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
707 len_left -= frag->size;
708 frag_len_left = frag->size;
709 offset = frag->page_offset;
710
711 while (frag_len_left) {
712 len = min(frag_len_left,
713 (unsigned int)WQ_ENET_MAX_DESC_LEN);
714 dma_addr = pci_map_page(enic->pdev, frag->page,
715 offset, len,
716 PCI_DMA_TODEVICE);
717 enic_queue_wq_desc_cont(wq, skb,
718 dma_addr,
719 len,
720 (len_left == 0) &&
721 (len == frag_len_left), /* EOP? */
722 loopback);
723 frag_len_left -= len;
724 offset += len;
725 }
726 }
727 }
728
729 static inline void enic_queue_wq_skb(struct enic *enic,
730 struct vnic_wq *wq, struct sk_buff *skb)
731 {
732 unsigned int mss = skb_shinfo(skb)->gso_size;
733 unsigned int vlan_tag = 0;
734 int vlan_tag_insert = 0;
735 int loopback = 0;
736
737 if (vlan_tx_tag_present(skb)) {
738 /* VLAN tag from trunking driver */
739 vlan_tag_insert = 1;
740 vlan_tag = vlan_tx_tag_get(skb);
741 } else if (enic->loop_enable) {
742 vlan_tag = enic->loop_tag;
743 loopback = 1;
744 }
745
746 if (mss)
747 enic_queue_wq_skb_tso(enic, wq, skb, mss,
748 vlan_tag_insert, vlan_tag, loopback);
749 else if (skb->ip_summed == CHECKSUM_PARTIAL)
750 enic_queue_wq_skb_csum_l4(enic, wq, skb,
751 vlan_tag_insert, vlan_tag, loopback);
752 else
753 enic_queue_wq_skb_vlan(enic, wq, skb,
754 vlan_tag_insert, vlan_tag, loopback);
755 }
756
757 /* netif_tx_lock held, process context with BHs disabled, or BH */
758 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
759 struct net_device *netdev)
760 {
761 struct enic *enic = netdev_priv(netdev);
762 struct vnic_wq *wq = &enic->wq[0];
763 unsigned long flags;
764
765 if (skb->len <= 0) {
766 dev_kfree_skb(skb);
767 return NETDEV_TX_OK;
768 }
769
770 /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
771 * which is very likely. In the off chance it's going to take
772 * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
773 */
774
775 if (skb_shinfo(skb)->gso_size == 0 &&
776 skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
777 skb_linearize(skb)) {
778 dev_kfree_skb(skb);
779 return NETDEV_TX_OK;
780 }
781
782 spin_lock_irqsave(&enic->wq_lock[0], flags);
783
784 if (vnic_wq_desc_avail(wq) <
785 skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
786 netif_stop_queue(netdev);
787 /* This is a hard error, log it */
788 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
789 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
790 return NETDEV_TX_BUSY;
791 }
792
793 enic_queue_wq_skb(enic, wq, skb);
794
795 if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
796 netif_stop_queue(netdev);
797
798 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
799
800 return NETDEV_TX_OK;
801 }
802
803 /* dev_base_lock rwlock held, nominally process context */
804 static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
805 struct rtnl_link_stats64 *net_stats)
806 {
807 struct enic *enic = netdev_priv(netdev);
808 struct vnic_stats *stats;
809
810 enic_dev_stats_dump(enic, &stats);
811
812 net_stats->tx_packets = stats->tx.tx_frames_ok;
813 net_stats->tx_bytes = stats->tx.tx_bytes_ok;
814 net_stats->tx_errors = stats->tx.tx_errors;
815 net_stats->tx_dropped = stats->tx.tx_drops;
816
817 net_stats->rx_packets = stats->rx.rx_frames_ok;
818 net_stats->rx_bytes = stats->rx.rx_bytes_ok;
819 net_stats->rx_errors = stats->rx.rx_errors;
820 net_stats->multicast = stats->rx.rx_multicast_frames_ok;
821 net_stats->rx_over_errors = enic->rq_truncated_pkts;
822 net_stats->rx_crc_errors = enic->rq_bad_fcs;
823 net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
824
825 return net_stats;
826 }
827
828 void enic_reset_addr_lists(struct enic *enic)
829 {
830 enic->mc_count = 0;
831 enic->uc_count = 0;
832 enic->flags = 0;
833 }
834
835 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
836 {
837 struct enic *enic = netdev_priv(netdev);
838
839 if (enic_is_dynamic(enic)) {
840 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
841 return -EADDRNOTAVAIL;
842 } else {
843 if (!is_valid_ether_addr(addr))
844 return -EADDRNOTAVAIL;
845 }
846
847 memcpy(netdev->dev_addr, addr, netdev->addr_len);
848
849 return 0;
850 }
851
852 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
853 {
854 struct enic *enic = netdev_priv(netdev);
855 struct sockaddr *saddr = p;
856 char *addr = saddr->sa_data;
857 int err;
858
859 if (netif_running(enic->netdev)) {
860 err = enic_dev_del_station_addr(enic);
861 if (err)
862 return err;
863 }
864
865 err = enic_set_mac_addr(netdev, addr);
866 if (err)
867 return err;
868
869 if (netif_running(enic->netdev)) {
870 err = enic_dev_add_station_addr(enic);
871 if (err)
872 return err;
873 }
874
875 return err;
876 }
877
878 static int enic_set_mac_address(struct net_device *netdev, void *p)
879 {
880 struct sockaddr *saddr = p;
881 char *addr = saddr->sa_data;
882 struct enic *enic = netdev_priv(netdev);
883 int err;
884
885 err = enic_dev_del_station_addr(enic);
886 if (err)
887 return err;
888
889 err = enic_set_mac_addr(netdev, addr);
890 if (err)
891 return err;
892
893 return enic_dev_add_station_addr(enic);
894 }
895
896 static void enic_update_multicast_addr_list(struct enic *enic)
897 {
898 struct net_device *netdev = enic->netdev;
899 struct netdev_hw_addr *ha;
900 unsigned int mc_count = netdev_mc_count(netdev);
901 u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
902 unsigned int i, j;
903
904 if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
905 netdev_warn(netdev, "Registering only %d out of %d "
906 "multicast addresses\n",
907 ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
908 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
909 }
910
911 /* Is there an easier way? Trying to minimize to
912 * calls to add/del multicast addrs. We keep the
913 * addrs from the last call in enic->mc_addr and
914 * look for changes to add/del.
915 */
916
917 i = 0;
918 netdev_for_each_mc_addr(ha, netdev) {
919 if (i == mc_count)
920 break;
921 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
922 }
923
924 for (i = 0; i < enic->mc_count; i++) {
925 for (j = 0; j < mc_count; j++)
926 if (compare_ether_addr(enic->mc_addr[i],
927 mc_addr[j]) == 0)
928 break;
929 if (j == mc_count)
930 enic_dev_del_addr(enic, enic->mc_addr[i]);
931 }
932
933 for (i = 0; i < mc_count; i++) {
934 for (j = 0; j < enic->mc_count; j++)
935 if (compare_ether_addr(mc_addr[i],
936 enic->mc_addr[j]) == 0)
937 break;
938 if (j == enic->mc_count)
939 enic_dev_add_addr(enic, mc_addr[i]);
940 }
941
942 /* Save the list to compare against next time
943 */
944
945 for (i = 0; i < mc_count; i++)
946 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
947
948 enic->mc_count = mc_count;
949 }
950
951 static void enic_update_unicast_addr_list(struct enic *enic)
952 {
953 struct net_device *netdev = enic->netdev;
954 struct netdev_hw_addr *ha;
955 unsigned int uc_count = netdev_uc_count(netdev);
956 u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
957 unsigned int i, j;
958
959 if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
960 netdev_warn(netdev, "Registering only %d out of %d "
961 "unicast addresses\n",
962 ENIC_UNICAST_PERFECT_FILTERS, uc_count);
963 uc_count = ENIC_UNICAST_PERFECT_FILTERS;
964 }
965
966 /* Is there an easier way? Trying to minimize to
967 * calls to add/del unicast addrs. We keep the
968 * addrs from the last call in enic->uc_addr and
969 * look for changes to add/del.
970 */
971
972 i = 0;
973 netdev_for_each_uc_addr(ha, netdev) {
974 if (i == uc_count)
975 break;
976 memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
977 }
978
979 for (i = 0; i < enic->uc_count; i++) {
980 for (j = 0; j < uc_count; j++)
981 if (compare_ether_addr(enic->uc_addr[i],
982 uc_addr[j]) == 0)
983 break;
984 if (j == uc_count)
985 enic_dev_del_addr(enic, enic->uc_addr[i]);
986 }
987
988 for (i = 0; i < uc_count; i++) {
989 for (j = 0; j < enic->uc_count; j++)
990 if (compare_ether_addr(uc_addr[i],
991 enic->uc_addr[j]) == 0)
992 break;
993 if (j == enic->uc_count)
994 enic_dev_add_addr(enic, uc_addr[i]);
995 }
996
997 /* Save the list to compare against next time
998 */
999
1000 for (i = 0; i < uc_count; i++)
1001 memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
1002
1003 enic->uc_count = uc_count;
1004 }
1005
1006 /* netif_tx_lock held, BHs disabled */
1007 static void enic_set_rx_mode(struct net_device *netdev)
1008 {
1009 struct enic *enic = netdev_priv(netdev);
1010 int directed = 1;
1011 int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1012 int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1013 int promisc = (netdev->flags & IFF_PROMISC) ||
1014 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
1015 int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1016 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
1017 unsigned int flags = netdev->flags |
1018 (allmulti ? IFF_ALLMULTI : 0) |
1019 (promisc ? IFF_PROMISC : 0);
1020
1021 if (enic->flags != flags) {
1022 enic->flags = flags;
1023 enic_dev_packet_filter(enic, directed,
1024 multicast, broadcast, promisc, allmulti);
1025 }
1026
1027 if (!promisc) {
1028 enic_update_unicast_addr_list(enic);
1029 if (!allmulti)
1030 enic_update_multicast_addr_list(enic);
1031 }
1032 }
1033
1034 /* rtnl lock is held */
1035 static void enic_vlan_rx_register(struct net_device *netdev,
1036 struct vlan_group *vlan_group)
1037 {
1038 struct enic *enic = netdev_priv(netdev);
1039 enic->vlan_group = vlan_group;
1040 }
1041
1042 /* netif_tx_lock held, BHs disabled */
1043 static void enic_tx_timeout(struct net_device *netdev)
1044 {
1045 struct enic *enic = netdev_priv(netdev);
1046 schedule_work(&enic->reset);
1047 }
1048
1049 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
1050 {
1051 struct enic *enic = netdev_priv(netdev);
1052
1053 if (vf != PORT_SELF_VF)
1054 return -EOPNOTSUPP;
1055
1056 /* Ignore the vf argument for now. We can assume the request
1057 * is coming on a vf.
1058 */
1059 if (is_valid_ether_addr(mac)) {
1060 memcpy(enic->pp.vf_mac, mac, ETH_ALEN);
1061 return 0;
1062 } else
1063 return -EINVAL;
1064 }
1065
1066 static int enic_set_vf_port(struct net_device *netdev, int vf,
1067 struct nlattr *port[])
1068 {
1069 struct enic *enic = netdev_priv(netdev);
1070 struct enic_port_profile prev_pp;
1071 int err = 0, restore_pp = 1;
1072
1073 /* don't support VFs, yet */
1074 if (vf != PORT_SELF_VF)
1075 return -EOPNOTSUPP;
1076
1077 if (!port[IFLA_PORT_REQUEST])
1078 return -EOPNOTSUPP;
1079
1080 memcpy(&prev_pp, &enic->pp, sizeof(enic->pp));
1081 memset(&enic->pp, 0, sizeof(enic->pp));
1082
1083 enic->pp.set |= ENIC_SET_REQUEST;
1084 enic->pp.request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1085
1086 if (port[IFLA_PORT_PROFILE]) {
1087 enic->pp.set |= ENIC_SET_NAME;
1088 memcpy(enic->pp.name, nla_data(port[IFLA_PORT_PROFILE]),
1089 PORT_PROFILE_MAX);
1090 }
1091
1092 if (port[IFLA_PORT_INSTANCE_UUID]) {
1093 enic->pp.set |= ENIC_SET_INSTANCE;
1094 memcpy(enic->pp.instance_uuid,
1095 nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1096 }
1097
1098 if (port[IFLA_PORT_HOST_UUID]) {
1099 enic->pp.set |= ENIC_SET_HOST;
1100 memcpy(enic->pp.host_uuid,
1101 nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1102 }
1103
1104 /* Special case handling: mac came from IFLA_VF_MAC */
1105 if (!is_zero_ether_addr(prev_pp.vf_mac))
1106 memcpy(enic->pp.mac_addr, prev_pp.vf_mac, ETH_ALEN);
1107
1108 if (is_zero_ether_addr(netdev->dev_addr))
1109 random_ether_addr(netdev->dev_addr);
1110
1111 err = enic_process_set_pp_request(enic, &prev_pp, &restore_pp);
1112 if (err) {
1113 if (restore_pp) {
1114 /* Things are still the way they were: Implicit
1115 * DISASSOCIATE failed
1116 */
1117 memcpy(&enic->pp, &prev_pp, sizeof(enic->pp));
1118 } else {
1119 memset(&enic->pp, 0, sizeof(enic->pp));
1120 memset(netdev->dev_addr, 0, ETH_ALEN);
1121 }
1122 } else {
1123 /* Set flag to indicate that the port assoc/disassoc
1124 * request has been sent out to fw
1125 */
1126 enic->pp.set |= ENIC_PORT_REQUEST_APPLIED;
1127
1128 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
1129 if (enic->pp.request == PORT_REQUEST_DISASSOCIATE) {
1130 memset(enic->pp.mac_addr, 0, ETH_ALEN);
1131 memset(netdev->dev_addr, 0, ETH_ALEN);
1132 }
1133 }
1134
1135 memset(enic->pp.vf_mac, 0, ETH_ALEN);
1136
1137 return err;
1138 }
1139
1140 static int enic_get_vf_port(struct net_device *netdev, int vf,
1141 struct sk_buff *skb)
1142 {
1143 struct enic *enic = netdev_priv(netdev);
1144 u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1145 int err;
1146
1147 if (!(enic->pp.set & ENIC_PORT_REQUEST_APPLIED))
1148 return -ENODATA;
1149
1150 err = enic_process_get_pp_request(enic, enic->pp.request, &response);
1151 if (err)
1152 return err;
1153
1154 NLA_PUT_U16(skb, IFLA_PORT_REQUEST, enic->pp.request);
1155 NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
1156 if (enic->pp.set & ENIC_SET_NAME)
1157 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
1158 enic->pp.name);
1159 if (enic->pp.set & ENIC_SET_INSTANCE)
1160 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1161 enic->pp.instance_uuid);
1162 if (enic->pp.set & ENIC_SET_HOST)
1163 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
1164 enic->pp.host_uuid);
1165
1166 return 0;
1167
1168 nla_put_failure:
1169 return -EMSGSIZE;
1170 }
1171
1172 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1173 {
1174 struct enic *enic = vnic_dev_priv(rq->vdev);
1175
1176 if (!buf->os_buf)
1177 return;
1178
1179 pci_unmap_single(enic->pdev, buf->dma_addr,
1180 buf->len, PCI_DMA_FROMDEVICE);
1181 dev_kfree_skb_any(buf->os_buf);
1182 }
1183
1184 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1185 {
1186 struct enic *enic = vnic_dev_priv(rq->vdev);
1187 struct net_device *netdev = enic->netdev;
1188 struct sk_buff *skb;
1189 unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1190 unsigned int os_buf_index = 0;
1191 dma_addr_t dma_addr;
1192
1193 skb = netdev_alloc_skb_ip_align(netdev, len);
1194 if (!skb)
1195 return -ENOMEM;
1196
1197 dma_addr = pci_map_single(enic->pdev, skb->data,
1198 len, PCI_DMA_FROMDEVICE);
1199
1200 enic_queue_rq_desc(rq, skb, os_buf_index,
1201 dma_addr, len);
1202
1203 return 0;
1204 }
1205
1206 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1207 struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1208 int skipped, void *opaque)
1209 {
1210 struct enic *enic = vnic_dev_priv(rq->vdev);
1211 struct net_device *netdev = enic->netdev;
1212 struct sk_buff *skb;
1213
1214 u8 type, color, eop, sop, ingress_port, vlan_stripped;
1215 u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1216 u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1217 u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1218 u8 packet_error;
1219 u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1220 u32 rss_hash;
1221
1222 if (skipped)
1223 return;
1224
1225 skb = buf->os_buf;
1226 prefetch(skb->data - NET_IP_ALIGN);
1227 pci_unmap_single(enic->pdev, buf->dma_addr,
1228 buf->len, PCI_DMA_FROMDEVICE);
1229
1230 cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1231 &type, &color, &q_number, &completed_index,
1232 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1233 &csum_not_calc, &rss_hash, &bytes_written,
1234 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1235 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1236 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1237 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1238 &fcs_ok);
1239
1240 if (packet_error) {
1241
1242 if (!fcs_ok) {
1243 if (bytes_written > 0)
1244 enic->rq_bad_fcs++;
1245 else if (bytes_written == 0)
1246 enic->rq_truncated_pkts++;
1247 }
1248
1249 dev_kfree_skb_any(skb);
1250
1251 return;
1252 }
1253
1254 if (eop && bytes_written > 0) {
1255
1256 /* Good receive
1257 */
1258
1259 skb_put(skb, bytes_written);
1260 skb->protocol = eth_type_trans(skb, netdev);
1261
1262 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) {
1263 skb->csum = htons(checksum);
1264 skb->ip_summed = CHECKSUM_COMPLETE;
1265 }
1266
1267 skb->dev = netdev;
1268
1269 if (enic->vlan_group && vlan_stripped &&
1270 (vlan_tci & CQ_ENET_RQ_DESC_VLAN_TCI_VLAN_MASK)) {
1271
1272 if (netdev->features & NETIF_F_GRO)
1273 vlan_gro_receive(&enic->napi[q_number],
1274 enic->vlan_group, vlan_tci, skb);
1275 else
1276 vlan_hwaccel_receive_skb(skb,
1277 enic->vlan_group, vlan_tci);
1278
1279 } else {
1280
1281 if (netdev->features & NETIF_F_GRO)
1282 napi_gro_receive(&enic->napi[q_number], skb);
1283 else
1284 netif_receive_skb(skb);
1285
1286 }
1287 } else {
1288
1289 /* Buffer overflow
1290 */
1291
1292 dev_kfree_skb_any(skb);
1293 }
1294 }
1295
1296 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1297 u8 type, u16 q_number, u16 completed_index, void *opaque)
1298 {
1299 struct enic *enic = vnic_dev_priv(vdev);
1300
1301 vnic_rq_service(&enic->rq[q_number], cq_desc,
1302 completed_index, VNIC_RQ_RETURN_DESC,
1303 enic_rq_indicate_buf, opaque);
1304
1305 return 0;
1306 }
1307
1308 static int enic_poll(struct napi_struct *napi, int budget)
1309 {
1310 struct net_device *netdev = napi->dev;
1311 struct enic *enic = netdev_priv(netdev);
1312 unsigned int cq_rq = enic_cq_rq(enic, 0);
1313 unsigned int cq_wq = enic_cq_wq(enic, 0);
1314 unsigned int intr = enic_legacy_io_intr();
1315 unsigned int rq_work_to_do = budget;
1316 unsigned int wq_work_to_do = -1; /* no limit */
1317 unsigned int work_done, rq_work_done, wq_work_done;
1318 int err;
1319
1320 /* Service RQ (first) and WQ
1321 */
1322
1323 rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1324 rq_work_to_do, enic_rq_service, NULL);
1325
1326 wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
1327 wq_work_to_do, enic_wq_service, NULL);
1328
1329 /* Accumulate intr event credits for this polling
1330 * cycle. An intr event is the completion of a
1331 * a WQ or RQ packet.
1332 */
1333
1334 work_done = rq_work_done + wq_work_done;
1335
1336 if (work_done > 0)
1337 vnic_intr_return_credits(&enic->intr[intr],
1338 work_done,
1339 0 /* don't unmask intr */,
1340 0 /* don't reset intr timer */);
1341
1342 err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1343
1344 /* Buffer allocation failed. Stay in polling
1345 * mode so we can try to fill the ring again.
1346 */
1347
1348 if (err)
1349 rq_work_done = rq_work_to_do;
1350
1351 if (rq_work_done < rq_work_to_do) {
1352
1353 /* Some work done, but not enough to stay in polling,
1354 * exit polling
1355 */
1356
1357 napi_complete(napi);
1358 vnic_intr_unmask(&enic->intr[intr]);
1359 }
1360
1361 return rq_work_done;
1362 }
1363
1364 static int enic_poll_msix(struct napi_struct *napi, int budget)
1365 {
1366 struct net_device *netdev = napi->dev;
1367 struct enic *enic = netdev_priv(netdev);
1368 unsigned int rq = (napi - &enic->napi[0]);
1369 unsigned int cq = enic_cq_rq(enic, rq);
1370 unsigned int intr = enic_msix_rq_intr(enic, rq);
1371 unsigned int work_to_do = budget;
1372 unsigned int work_done;
1373 int err;
1374
1375 /* Service RQ
1376 */
1377
1378 work_done = vnic_cq_service(&enic->cq[cq],
1379 work_to_do, enic_rq_service, NULL);
1380
1381 /* Return intr event credits for this polling
1382 * cycle. An intr event is the completion of a
1383 * RQ packet.
1384 */
1385
1386 if (work_done > 0)
1387 vnic_intr_return_credits(&enic->intr[intr],
1388 work_done,
1389 0 /* don't unmask intr */,
1390 0 /* don't reset intr timer */);
1391
1392 err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1393
1394 /* Buffer allocation failed. Stay in polling mode
1395 * so we can try to fill the ring again.
1396 */
1397
1398 if (err)
1399 work_done = work_to_do;
1400
1401 if (work_done < work_to_do) {
1402
1403 /* Some work done, but not enough to stay in polling,
1404 * exit polling
1405 */
1406
1407 napi_complete(napi);
1408 vnic_intr_unmask(&enic->intr[intr]);
1409 }
1410
1411 return work_done;
1412 }
1413
1414 static void enic_notify_timer(unsigned long data)
1415 {
1416 struct enic *enic = (struct enic *)data;
1417
1418 enic_notify_check(enic);
1419
1420 mod_timer(&enic->notify_timer,
1421 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1422 }
1423
1424 static void enic_free_intr(struct enic *enic)
1425 {
1426 struct net_device *netdev = enic->netdev;
1427 unsigned int i;
1428
1429 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1430 case VNIC_DEV_INTR_MODE_INTX:
1431 free_irq(enic->pdev->irq, netdev);
1432 break;
1433 case VNIC_DEV_INTR_MODE_MSI:
1434 free_irq(enic->pdev->irq, enic);
1435 break;
1436 case VNIC_DEV_INTR_MODE_MSIX:
1437 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1438 if (enic->msix[i].requested)
1439 free_irq(enic->msix_entry[i].vector,
1440 enic->msix[i].devid);
1441 break;
1442 default:
1443 break;
1444 }
1445 }
1446
1447 static int enic_request_intr(struct enic *enic)
1448 {
1449 struct net_device *netdev = enic->netdev;
1450 unsigned int i, intr;
1451 int err = 0;
1452
1453 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1454
1455 case VNIC_DEV_INTR_MODE_INTX:
1456
1457 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1458 IRQF_SHARED, netdev->name, netdev);
1459 break;
1460
1461 case VNIC_DEV_INTR_MODE_MSI:
1462
1463 err = request_irq(enic->pdev->irq, enic_isr_msi,
1464 0, netdev->name, enic);
1465 break;
1466
1467 case VNIC_DEV_INTR_MODE_MSIX:
1468
1469 for (i = 0; i < enic->rq_count; i++) {
1470 intr = enic_msix_rq_intr(enic, i);
1471 sprintf(enic->msix[intr].devname,
1472 "%.11s-rx-%d", netdev->name, i);
1473 enic->msix[intr].isr = enic_isr_msix_rq;
1474 enic->msix[intr].devid = &enic->napi[i];
1475 }
1476
1477 for (i = 0; i < enic->wq_count; i++) {
1478 intr = enic_msix_wq_intr(enic, i);
1479 sprintf(enic->msix[intr].devname,
1480 "%.11s-tx-%d", netdev->name, i);
1481 enic->msix[intr].isr = enic_isr_msix_wq;
1482 enic->msix[intr].devid = enic;
1483 }
1484
1485 intr = enic_msix_err_intr(enic);
1486 sprintf(enic->msix[intr].devname,
1487 "%.11s-err", netdev->name);
1488 enic->msix[intr].isr = enic_isr_msix_err;
1489 enic->msix[intr].devid = enic;
1490
1491 intr = enic_msix_notify_intr(enic);
1492 sprintf(enic->msix[intr].devname,
1493 "%.11s-notify", netdev->name);
1494 enic->msix[intr].isr = enic_isr_msix_notify;
1495 enic->msix[intr].devid = enic;
1496
1497 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1498 enic->msix[i].requested = 0;
1499
1500 for (i = 0; i < enic->intr_count; i++) {
1501 err = request_irq(enic->msix_entry[i].vector,
1502 enic->msix[i].isr, 0,
1503 enic->msix[i].devname,
1504 enic->msix[i].devid);
1505 if (err) {
1506 enic_free_intr(enic);
1507 break;
1508 }
1509 enic->msix[i].requested = 1;
1510 }
1511
1512 break;
1513
1514 default:
1515 break;
1516 }
1517
1518 return err;
1519 }
1520
1521 static void enic_synchronize_irqs(struct enic *enic)
1522 {
1523 unsigned int i;
1524
1525 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1526 case VNIC_DEV_INTR_MODE_INTX:
1527 case VNIC_DEV_INTR_MODE_MSI:
1528 synchronize_irq(enic->pdev->irq);
1529 break;
1530 case VNIC_DEV_INTR_MODE_MSIX:
1531 for (i = 0; i < enic->intr_count; i++)
1532 synchronize_irq(enic->msix_entry[i].vector);
1533 break;
1534 default:
1535 break;
1536 }
1537 }
1538
1539 static int enic_dev_notify_set(struct enic *enic)
1540 {
1541 int err;
1542
1543 spin_lock(&enic->devcmd_lock);
1544 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1545 case VNIC_DEV_INTR_MODE_INTX:
1546 err = vnic_dev_notify_set(enic->vdev,
1547 enic_legacy_notify_intr());
1548 break;
1549 case VNIC_DEV_INTR_MODE_MSIX:
1550 err = vnic_dev_notify_set(enic->vdev,
1551 enic_msix_notify_intr(enic));
1552 break;
1553 default:
1554 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1555 break;
1556 }
1557 spin_unlock(&enic->devcmd_lock);
1558
1559 return err;
1560 }
1561
1562 static void enic_notify_timer_start(struct enic *enic)
1563 {
1564 switch (vnic_dev_get_intr_mode(enic->vdev)) {
1565 case VNIC_DEV_INTR_MODE_MSI:
1566 mod_timer(&enic->notify_timer, jiffies);
1567 break;
1568 default:
1569 /* Using intr for notification for INTx/MSI-X */
1570 break;
1571 }
1572 }
1573
1574 /* rtnl lock is held, process context */
1575 static int enic_open(struct net_device *netdev)
1576 {
1577 struct enic *enic = netdev_priv(netdev);
1578 unsigned int i;
1579 int err;
1580
1581 err = enic_request_intr(enic);
1582 if (err) {
1583 netdev_err(netdev, "Unable to request irq.\n");
1584 return err;
1585 }
1586
1587 err = enic_dev_notify_set(enic);
1588 if (err) {
1589 netdev_err(netdev,
1590 "Failed to alloc notify buffer, aborting.\n");
1591 goto err_out_free_intr;
1592 }
1593
1594 for (i = 0; i < enic->rq_count; i++) {
1595 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1596 /* Need at least one buffer on ring to get going */
1597 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1598 netdev_err(netdev, "Unable to alloc receive buffers\n");
1599 err = -ENOMEM;
1600 goto err_out_notify_unset;
1601 }
1602 }
1603
1604 for (i = 0; i < enic->wq_count; i++)
1605 vnic_wq_enable(&enic->wq[i]);
1606 for (i = 0; i < enic->rq_count; i++)
1607 vnic_rq_enable(&enic->rq[i]);
1608
1609 if (enic_is_dynamic(enic) && !is_zero_ether_addr(enic->pp.mac_addr))
1610 enic_dev_add_addr(enic, enic->pp.mac_addr);
1611 else
1612 enic_dev_add_station_addr(enic);
1613 enic_set_rx_mode(netdev);
1614
1615 netif_wake_queue(netdev);
1616
1617 for (i = 0; i < enic->rq_count; i++)
1618 napi_enable(&enic->napi[i]);
1619
1620 enic_dev_enable(enic);
1621
1622 for (i = 0; i < enic->intr_count; i++)
1623 vnic_intr_unmask(&enic->intr[i]);
1624
1625 enic_notify_timer_start(enic);
1626
1627 return 0;
1628
1629 err_out_notify_unset:
1630 enic_dev_notify_unset(enic);
1631 err_out_free_intr:
1632 enic_free_intr(enic);
1633
1634 return err;
1635 }
1636
1637 /* rtnl lock is held, process context */
1638 static int enic_stop(struct net_device *netdev)
1639 {
1640 struct enic *enic = netdev_priv(netdev);
1641 unsigned int i;
1642 int err;
1643
1644 for (i = 0; i < enic->intr_count; i++) {
1645 vnic_intr_mask(&enic->intr[i]);
1646 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1647 }
1648
1649 enic_synchronize_irqs(enic);
1650
1651 del_timer_sync(&enic->notify_timer);
1652
1653 enic_dev_disable(enic);
1654
1655 for (i = 0; i < enic->rq_count; i++)
1656 napi_disable(&enic->napi[i]);
1657
1658 netif_carrier_off(netdev);
1659 netif_tx_disable(netdev);
1660 if (enic_is_dynamic(enic) && !is_zero_ether_addr(enic->pp.mac_addr))
1661 enic_dev_del_addr(enic, enic->pp.mac_addr);
1662 else
1663 enic_dev_del_station_addr(enic);
1664
1665 for (i = 0; i < enic->wq_count; i++) {
1666 err = vnic_wq_disable(&enic->wq[i]);
1667 if (err)
1668 return err;
1669 }
1670 for (i = 0; i < enic->rq_count; i++) {
1671 err = vnic_rq_disable(&enic->rq[i]);
1672 if (err)
1673 return err;
1674 }
1675
1676 enic_dev_notify_unset(enic);
1677 enic_free_intr(enic);
1678
1679 for (i = 0; i < enic->wq_count; i++)
1680 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1681 for (i = 0; i < enic->rq_count; i++)
1682 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1683 for (i = 0; i < enic->cq_count; i++)
1684 vnic_cq_clean(&enic->cq[i]);
1685 for (i = 0; i < enic->intr_count; i++)
1686 vnic_intr_clean(&enic->intr[i]);
1687
1688 return 0;
1689 }
1690
1691 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1692 {
1693 struct enic *enic = netdev_priv(netdev);
1694 int running = netif_running(netdev);
1695
1696 if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1697 return -EINVAL;
1698
1699 if (enic_is_dynamic(enic))
1700 return -EOPNOTSUPP;
1701
1702 if (running)
1703 enic_stop(netdev);
1704
1705 netdev->mtu = new_mtu;
1706
1707 if (netdev->mtu > enic->port_mtu)
1708 netdev_warn(netdev,
1709 "interface MTU (%d) set higher than port MTU (%d)\n",
1710 netdev->mtu, enic->port_mtu);
1711
1712 if (running)
1713 enic_open(netdev);
1714
1715 return 0;
1716 }
1717
1718 static void enic_change_mtu_work(struct work_struct *work)
1719 {
1720 struct enic *enic = container_of(work, struct enic, change_mtu_work);
1721 struct net_device *netdev = enic->netdev;
1722 int new_mtu = vnic_dev_mtu(enic->vdev);
1723 int err;
1724 unsigned int i;
1725
1726 new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
1727
1728 rtnl_lock();
1729
1730 /* Stop RQ */
1731 del_timer_sync(&enic->notify_timer);
1732
1733 for (i = 0; i < enic->rq_count; i++)
1734 napi_disable(&enic->napi[i]);
1735
1736 vnic_intr_mask(&enic->intr[0]);
1737 enic_synchronize_irqs(enic);
1738 err = vnic_rq_disable(&enic->rq[0]);
1739 if (err) {
1740 netdev_err(netdev, "Unable to disable RQ.\n");
1741 return;
1742 }
1743 vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
1744 vnic_cq_clean(&enic->cq[0]);
1745 vnic_intr_clean(&enic->intr[0]);
1746
1747 /* Fill RQ with new_mtu-sized buffers */
1748 netdev->mtu = new_mtu;
1749 vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1750 /* Need at least one buffer on ring to get going */
1751 if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
1752 netdev_err(netdev, "Unable to alloc receive buffers.\n");
1753 return;
1754 }
1755
1756 /* Start RQ */
1757 vnic_rq_enable(&enic->rq[0]);
1758 napi_enable(&enic->napi[0]);
1759 vnic_intr_unmask(&enic->intr[0]);
1760 enic_notify_timer_start(enic);
1761
1762 rtnl_unlock();
1763
1764 netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
1765 }
1766
1767 #ifdef CONFIG_NET_POLL_CONTROLLER
1768 static void enic_poll_controller(struct net_device *netdev)
1769 {
1770 struct enic *enic = netdev_priv(netdev);
1771 struct vnic_dev *vdev = enic->vdev;
1772 unsigned int i, intr;
1773
1774 switch (vnic_dev_get_intr_mode(vdev)) {
1775 case VNIC_DEV_INTR_MODE_MSIX:
1776 for (i = 0; i < enic->rq_count; i++) {
1777 intr = enic_msix_rq_intr(enic, i);
1778 enic_isr_msix_rq(enic->msix_entry[intr].vector,
1779 &enic->napi[i]);
1780 }
1781 intr = enic_msix_wq_intr(enic, i);
1782 enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
1783 break;
1784 case VNIC_DEV_INTR_MODE_MSI:
1785 enic_isr_msi(enic->pdev->irq, enic);
1786 break;
1787 case VNIC_DEV_INTR_MODE_INTX:
1788 enic_isr_legacy(enic->pdev->irq, netdev);
1789 break;
1790 default:
1791 break;
1792 }
1793 }
1794 #endif
1795
1796 static int enic_dev_wait(struct vnic_dev *vdev,
1797 int (*start)(struct vnic_dev *, int),
1798 int (*finished)(struct vnic_dev *, int *),
1799 int arg)
1800 {
1801 unsigned long time;
1802 int done;
1803 int err;
1804
1805 BUG_ON(in_interrupt());
1806
1807 err = start(vdev, arg);
1808 if (err)
1809 return err;
1810
1811 /* Wait for func to complete...2 seconds max
1812 */
1813
1814 time = jiffies + (HZ * 2);
1815 do {
1816
1817 err = finished(vdev, &done);
1818 if (err)
1819 return err;
1820
1821 if (done)
1822 return 0;
1823
1824 schedule_timeout_uninterruptible(HZ / 10);
1825
1826 } while (time_after(time, jiffies));
1827
1828 return -ETIMEDOUT;
1829 }
1830
1831 static int enic_dev_open(struct enic *enic)
1832 {
1833 int err;
1834
1835 err = enic_dev_wait(enic->vdev, vnic_dev_open,
1836 vnic_dev_open_done, 0);
1837 if (err)
1838 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1839 err);
1840
1841 return err;
1842 }
1843
1844 static int enic_dev_hang_reset(struct enic *enic)
1845 {
1846 int err;
1847
1848 err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1849 vnic_dev_hang_reset_done, 0);
1850 if (err)
1851 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1852 err);
1853
1854 return err;
1855 }
1856
1857 static int enic_set_rsskey(struct enic *enic)
1858 {
1859 dma_addr_t rss_key_buf_pa;
1860 union vnic_rss_key *rss_key_buf_va = NULL;
1861 union vnic_rss_key rss_key = {
1862 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1863 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1864 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1865 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1866 };
1867 int err;
1868
1869 rss_key_buf_va = pci_alloc_consistent(enic->pdev,
1870 sizeof(union vnic_rss_key), &rss_key_buf_pa);
1871 if (!rss_key_buf_va)
1872 return -ENOMEM;
1873
1874 memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
1875
1876 spin_lock(&enic->devcmd_lock);
1877 err = enic_set_rss_key(enic,
1878 rss_key_buf_pa,
1879 sizeof(union vnic_rss_key));
1880 spin_unlock(&enic->devcmd_lock);
1881
1882 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1883 rss_key_buf_va, rss_key_buf_pa);
1884
1885 return err;
1886 }
1887
1888 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1889 {
1890 dma_addr_t rss_cpu_buf_pa;
1891 union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1892 unsigned int i;
1893 int err;
1894
1895 rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1896 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1897 if (!rss_cpu_buf_va)
1898 return -ENOMEM;
1899
1900 for (i = 0; i < (1 << rss_hash_bits); i++)
1901 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1902
1903 spin_lock(&enic->devcmd_lock);
1904 err = enic_set_rss_cpu(enic,
1905 rss_cpu_buf_pa,
1906 sizeof(union vnic_rss_cpu));
1907 spin_unlock(&enic->devcmd_lock);
1908
1909 pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1910 rss_cpu_buf_va, rss_cpu_buf_pa);
1911
1912 return err;
1913 }
1914
1915 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
1916 u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
1917 {
1918 const u8 tso_ipid_split_en = 0;
1919 const u8 ig_vlan_strip_en = 1;
1920 int err;
1921
1922 /* Enable VLAN tag stripping.
1923 */
1924
1925 spin_lock(&enic->devcmd_lock);
1926 err = enic_set_nic_cfg(enic,
1927 rss_default_cpu, rss_hash_type,
1928 rss_hash_bits, rss_base_cpu,
1929 rss_enable, tso_ipid_split_en,
1930 ig_vlan_strip_en);
1931 spin_unlock(&enic->devcmd_lock);
1932
1933 return err;
1934 }
1935
1936 static int enic_set_rss_nic_cfg(struct enic *enic)
1937 {
1938 struct device *dev = enic_get_dev(enic);
1939 const u8 rss_default_cpu = 0;
1940 const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1941 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1942 NIC_CFG_RSS_HASH_TYPE_IPV6 |
1943 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1944 const u8 rss_hash_bits = 7;
1945 const u8 rss_base_cpu = 0;
1946 u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1947
1948 if (rss_enable) {
1949 if (!enic_set_rsskey(enic)) {
1950 if (enic_set_rsscpu(enic, rss_hash_bits)) {
1951 rss_enable = 0;
1952 dev_warn(dev, "RSS disabled, "
1953 "Failed to set RSS cpu indirection table.");
1954 }
1955 } else {
1956 rss_enable = 0;
1957 dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
1958 }
1959 }
1960
1961 return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1962 rss_hash_bits, rss_base_cpu, rss_enable);
1963 }
1964
1965 static void enic_reset(struct work_struct *work)
1966 {
1967 struct enic *enic = container_of(work, struct enic, reset);
1968
1969 if (!netif_running(enic->netdev))
1970 return;
1971
1972 rtnl_lock();
1973
1974 enic_dev_hang_notify(enic);
1975 enic_stop(enic->netdev);
1976 enic_dev_hang_reset(enic);
1977 enic_reset_addr_lists(enic);
1978 enic_init_vnic_resources(enic);
1979 enic_set_rss_nic_cfg(enic);
1980 enic_dev_set_ig_vlan_rewrite_mode(enic);
1981 enic_open(enic->netdev);
1982
1983 rtnl_unlock();
1984 }
1985
1986 static int enic_set_intr_mode(struct enic *enic)
1987 {
1988 unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
1989 unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
1990 unsigned int i;
1991
1992 /* Set interrupt mode (INTx, MSI, MSI-X) depending
1993 * on system capabilities.
1994 *
1995 * Try MSI-X first
1996 *
1997 * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1998 * (the second to last INTR is used for WQ/RQ errors)
1999 * (the last INTR is used for notifications)
2000 */
2001
2002 BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2003 for (i = 0; i < n + m + 2; i++)
2004 enic->msix_entry[i].entry = i;
2005
2006 /* Use multiple RQs if RSS is enabled
2007 */
2008
2009 if (ENIC_SETTING(enic, RSS) &&
2010 enic->config.intr_mode < 1 &&
2011 enic->rq_count >= n &&
2012 enic->wq_count >= m &&
2013 enic->cq_count >= n + m &&
2014 enic->intr_count >= n + m + 2) {
2015
2016 if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
2017
2018 enic->rq_count = n;
2019 enic->wq_count = m;
2020 enic->cq_count = n + m;
2021 enic->intr_count = n + m + 2;
2022
2023 vnic_dev_set_intr_mode(enic->vdev,
2024 VNIC_DEV_INTR_MODE_MSIX);
2025
2026 return 0;
2027 }
2028 }
2029
2030 if (enic->config.intr_mode < 1 &&
2031 enic->rq_count >= 1 &&
2032 enic->wq_count >= m &&
2033 enic->cq_count >= 1 + m &&
2034 enic->intr_count >= 1 + m + 2) {
2035 if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
2036
2037 enic->rq_count = 1;
2038 enic->wq_count = m;
2039 enic->cq_count = 1 + m;
2040 enic->intr_count = 1 + m + 2;
2041
2042 vnic_dev_set_intr_mode(enic->vdev,
2043 VNIC_DEV_INTR_MODE_MSIX);
2044
2045 return 0;
2046 }
2047 }
2048
2049 /* Next try MSI
2050 *
2051 * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2052 */
2053
2054 if (enic->config.intr_mode < 2 &&
2055 enic->rq_count >= 1 &&
2056 enic->wq_count >= 1 &&
2057 enic->cq_count >= 2 &&
2058 enic->intr_count >= 1 &&
2059 !pci_enable_msi(enic->pdev)) {
2060
2061 enic->rq_count = 1;
2062 enic->wq_count = 1;
2063 enic->cq_count = 2;
2064 enic->intr_count = 1;
2065
2066 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2067
2068 return 0;
2069 }
2070
2071 /* Next try INTx
2072 *
2073 * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2074 * (the first INTR is used for WQ/RQ)
2075 * (the second INTR is used for WQ/RQ errors)
2076 * (the last INTR is used for notifications)
2077 */
2078
2079 if (enic->config.intr_mode < 3 &&
2080 enic->rq_count >= 1 &&
2081 enic->wq_count >= 1 &&
2082 enic->cq_count >= 2 &&
2083 enic->intr_count >= 3) {
2084
2085 enic->rq_count = 1;
2086 enic->wq_count = 1;
2087 enic->cq_count = 2;
2088 enic->intr_count = 3;
2089
2090 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2091
2092 return 0;
2093 }
2094
2095 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2096
2097 return -EINVAL;
2098 }
2099
2100 static void enic_clear_intr_mode(struct enic *enic)
2101 {
2102 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2103 case VNIC_DEV_INTR_MODE_MSIX:
2104 pci_disable_msix(enic->pdev);
2105 break;
2106 case VNIC_DEV_INTR_MODE_MSI:
2107 pci_disable_msi(enic->pdev);
2108 break;
2109 default:
2110 break;
2111 }
2112
2113 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2114 }
2115
2116 static const struct net_device_ops enic_netdev_dynamic_ops = {
2117 .ndo_open = enic_open,
2118 .ndo_stop = enic_stop,
2119 .ndo_start_xmit = enic_hard_start_xmit,
2120 .ndo_get_stats64 = enic_get_stats,
2121 .ndo_validate_addr = eth_validate_addr,
2122 .ndo_set_rx_mode = enic_set_rx_mode,
2123 .ndo_set_multicast_list = enic_set_rx_mode,
2124 .ndo_set_mac_address = enic_set_mac_address_dynamic,
2125 .ndo_change_mtu = enic_change_mtu,
2126 .ndo_vlan_rx_register = enic_vlan_rx_register,
2127 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2128 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2129 .ndo_tx_timeout = enic_tx_timeout,
2130 .ndo_set_vf_port = enic_set_vf_port,
2131 .ndo_get_vf_port = enic_get_vf_port,
2132 .ndo_set_vf_mac = enic_set_vf_mac,
2133 #ifdef CONFIG_NET_POLL_CONTROLLER
2134 .ndo_poll_controller = enic_poll_controller,
2135 #endif
2136 };
2137
2138 static const struct net_device_ops enic_netdev_ops = {
2139 .ndo_open = enic_open,
2140 .ndo_stop = enic_stop,
2141 .ndo_start_xmit = enic_hard_start_xmit,
2142 .ndo_get_stats64 = enic_get_stats,
2143 .ndo_validate_addr = eth_validate_addr,
2144 .ndo_set_mac_address = enic_set_mac_address,
2145 .ndo_set_rx_mode = enic_set_rx_mode,
2146 .ndo_set_multicast_list = enic_set_rx_mode,
2147 .ndo_change_mtu = enic_change_mtu,
2148 .ndo_vlan_rx_register = enic_vlan_rx_register,
2149 .ndo_vlan_rx_add_vid = enic_vlan_rx_add_vid,
2150 .ndo_vlan_rx_kill_vid = enic_vlan_rx_kill_vid,
2151 .ndo_tx_timeout = enic_tx_timeout,
2152 #ifdef CONFIG_NET_POLL_CONTROLLER
2153 .ndo_poll_controller = enic_poll_controller,
2154 #endif
2155 };
2156
2157 static void enic_dev_deinit(struct enic *enic)
2158 {
2159 unsigned int i;
2160
2161 for (i = 0; i < enic->rq_count; i++)
2162 netif_napi_del(&enic->napi[i]);
2163
2164 enic_free_vnic_resources(enic);
2165 enic_clear_intr_mode(enic);
2166 }
2167
2168 static int enic_dev_init(struct enic *enic)
2169 {
2170 struct device *dev = enic_get_dev(enic);
2171 struct net_device *netdev = enic->netdev;
2172 unsigned int i;
2173 int err;
2174
2175 /* Get vNIC configuration
2176 */
2177
2178 err = enic_get_vnic_config(enic);
2179 if (err) {
2180 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2181 return err;
2182 }
2183
2184 /* Get available resource counts
2185 */
2186
2187 enic_get_res_counts(enic);
2188
2189 /* Set interrupt mode based on resource counts and system
2190 * capabilities
2191 */
2192
2193 err = enic_set_intr_mode(enic);
2194 if (err) {
2195 dev_err(dev, "Failed to set intr mode based on resource "
2196 "counts and system capabilities, aborting\n");
2197 return err;
2198 }
2199
2200 /* Allocate and configure vNIC resources
2201 */
2202
2203 err = enic_alloc_vnic_resources(enic);
2204 if (err) {
2205 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2206 goto err_out_free_vnic_resources;
2207 }
2208
2209 enic_init_vnic_resources(enic);
2210
2211 err = enic_set_rss_nic_cfg(enic);
2212 if (err) {
2213 dev_err(dev, "Failed to config nic, aborting\n");
2214 goto err_out_free_vnic_resources;
2215 }
2216
2217 switch (vnic_dev_get_intr_mode(enic->vdev)) {
2218 default:
2219 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2220 break;
2221 case VNIC_DEV_INTR_MODE_MSIX:
2222 for (i = 0; i < enic->rq_count; i++)
2223 netif_napi_add(netdev, &enic->napi[i],
2224 enic_poll_msix, 64);
2225 break;
2226 }
2227
2228 return 0;
2229
2230 err_out_free_vnic_resources:
2231 enic_clear_intr_mode(enic);
2232 enic_free_vnic_resources(enic);
2233
2234 return err;
2235 }
2236
2237 static void enic_iounmap(struct enic *enic)
2238 {
2239 unsigned int i;
2240
2241 for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2242 if (enic->bar[i].vaddr)
2243 iounmap(enic->bar[i].vaddr);
2244 }
2245
2246 static int __devinit enic_probe(struct pci_dev *pdev,
2247 const struct pci_device_id *ent)
2248 {
2249 struct device *dev = &pdev->dev;
2250 struct net_device *netdev;
2251 struct enic *enic;
2252 int using_dac = 0;
2253 unsigned int i;
2254 int err;
2255
2256 /* Allocate net device structure and initialize. Private
2257 * instance data is initialized to zero.
2258 */
2259
2260 netdev = alloc_etherdev(sizeof(struct enic));
2261 if (!netdev) {
2262 pr_err("Etherdev alloc failed, aborting\n");
2263 return -ENOMEM;
2264 }
2265
2266 pci_set_drvdata(pdev, netdev);
2267
2268 SET_NETDEV_DEV(netdev, &pdev->dev);
2269
2270 enic = netdev_priv(netdev);
2271 enic->netdev = netdev;
2272 enic->pdev = pdev;
2273
2274 /* Setup PCI resources
2275 */
2276
2277 err = pci_enable_device_mem(pdev);
2278 if (err) {
2279 dev_err(dev, "Cannot enable PCI device, aborting\n");
2280 goto err_out_free_netdev;
2281 }
2282
2283 err = pci_request_regions(pdev, DRV_NAME);
2284 if (err) {
2285 dev_err(dev, "Cannot request PCI regions, aborting\n");
2286 goto err_out_disable_device;
2287 }
2288
2289 pci_set_master(pdev);
2290
2291 /* Query PCI controller on system for DMA addressing
2292 * limitation for the device. Try 40-bit first, and
2293 * fail to 32-bit.
2294 */
2295
2296 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2297 if (err) {
2298 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2299 if (err) {
2300 dev_err(dev, "No usable DMA configuration, aborting\n");
2301 goto err_out_release_regions;
2302 }
2303 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2304 if (err) {
2305 dev_err(dev, "Unable to obtain %u-bit DMA "
2306 "for consistent allocations, aborting\n", 32);
2307 goto err_out_release_regions;
2308 }
2309 } else {
2310 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2311 if (err) {
2312 dev_err(dev, "Unable to obtain %u-bit DMA "
2313 "for consistent allocations, aborting\n", 40);
2314 goto err_out_release_regions;
2315 }
2316 using_dac = 1;
2317 }
2318
2319 /* Map vNIC resources from BAR0-5
2320 */
2321
2322 for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2323 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2324 continue;
2325 enic->bar[i].len = pci_resource_len(pdev, i);
2326 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2327 if (!enic->bar[i].vaddr) {
2328 dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2329 err = -ENODEV;
2330 goto err_out_iounmap;
2331 }
2332 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2333 }
2334
2335 /* Register vNIC device
2336 */
2337
2338 enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2339 ARRAY_SIZE(enic->bar));
2340 if (!enic->vdev) {
2341 dev_err(dev, "vNIC registration failed, aborting\n");
2342 err = -ENODEV;
2343 goto err_out_iounmap;
2344 }
2345
2346 /* Issue device open to get device in known state
2347 */
2348
2349 err = enic_dev_open(enic);
2350 if (err) {
2351 dev_err(dev, "vNIC dev open failed, aborting\n");
2352 goto err_out_vnic_unregister;
2353 }
2354
2355 /* Setup devcmd lock
2356 */
2357
2358 spin_lock_init(&enic->devcmd_lock);
2359
2360 /*
2361 * Set ingress vlan rewrite mode before vnic initialization
2362 */
2363
2364 err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2365 if (err) {
2366 dev_err(dev,
2367 "Failed to set ingress vlan rewrite mode, aborting.\n");
2368 goto err_out_dev_close;
2369 }
2370
2371 /* Issue device init to initialize the vnic-to-switch link.
2372 * We'll start with carrier off and wait for link UP
2373 * notification later to turn on carrier. We don't need
2374 * to wait here for the vnic-to-switch link initialization
2375 * to complete; link UP notification is the indication that
2376 * the process is complete.
2377 */
2378
2379 netif_carrier_off(netdev);
2380
2381 /* Do not call dev_init for a dynamic vnic.
2382 * For a dynamic vnic, init_prov_info will be
2383 * called later by an upper layer.
2384 */
2385
2386 if (!enic_is_dynamic(enic)) {
2387 err = vnic_dev_init(enic->vdev, 0);
2388 if (err) {
2389 dev_err(dev, "vNIC dev init failed, aborting\n");
2390 goto err_out_dev_close;
2391 }
2392 }
2393
2394 err = enic_dev_init(enic);
2395 if (err) {
2396 dev_err(dev, "Device initialization failed, aborting\n");
2397 goto err_out_dev_close;
2398 }
2399
2400 /* Setup notification timer, HW reset task, and wq locks
2401 */
2402
2403 init_timer(&enic->notify_timer);
2404 enic->notify_timer.function = enic_notify_timer;
2405 enic->notify_timer.data = (unsigned long)enic;
2406
2407 INIT_WORK(&enic->reset, enic_reset);
2408 INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2409
2410 for (i = 0; i < enic->wq_count; i++)
2411 spin_lock_init(&enic->wq_lock[i]);
2412
2413 /* Register net device
2414 */
2415
2416 enic->port_mtu = enic->config.mtu;
2417 (void)enic_change_mtu(netdev, enic->port_mtu);
2418
2419 err = enic_set_mac_addr(netdev, enic->mac_addr);
2420 if (err) {
2421 dev_err(dev, "Invalid MAC address, aborting\n");
2422 goto err_out_dev_deinit;
2423 }
2424
2425 enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2426 enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2427
2428 if (enic_is_dynamic(enic))
2429 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2430 else
2431 netdev->netdev_ops = &enic_netdev_ops;
2432
2433 netdev->watchdog_timeo = 2 * HZ;
2434 netdev->ethtool_ops = &enic_ethtool_ops;
2435
2436 netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2437 if (ENIC_SETTING(enic, LOOP)) {
2438 netdev->features &= ~NETIF_F_HW_VLAN_TX;
2439 enic->loop_enable = 1;
2440 enic->loop_tag = enic->config.loop_tag;
2441 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2442 }
2443 if (ENIC_SETTING(enic, TXCSUM))
2444 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2445 if (ENIC_SETTING(enic, TSO))
2446 netdev->hw_features |= NETIF_F_TSO |
2447 NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2448 if (ENIC_SETTING(enic, RXCSUM))
2449 netdev->hw_features |= NETIF_F_RXCSUM;
2450
2451 netdev->features |= netdev->hw_features;
2452
2453 if (using_dac)
2454 netdev->features |= NETIF_F_HIGHDMA;
2455
2456 err = register_netdev(netdev);
2457 if (err) {
2458 dev_err(dev, "Cannot register net device, aborting\n");
2459 goto err_out_dev_deinit;
2460 }
2461
2462 return 0;
2463
2464 err_out_dev_deinit:
2465 enic_dev_deinit(enic);
2466 err_out_dev_close:
2467 vnic_dev_close(enic->vdev);
2468 err_out_vnic_unregister:
2469 vnic_dev_unregister(enic->vdev);
2470 err_out_iounmap:
2471 enic_iounmap(enic);
2472 err_out_release_regions:
2473 pci_release_regions(pdev);
2474 err_out_disable_device:
2475 pci_disable_device(pdev);
2476 err_out_free_netdev:
2477 pci_set_drvdata(pdev, NULL);
2478 free_netdev(netdev);
2479
2480 return err;
2481 }
2482
2483 static void __devexit enic_remove(struct pci_dev *pdev)
2484 {
2485 struct net_device *netdev = pci_get_drvdata(pdev);
2486
2487 if (netdev) {
2488 struct enic *enic = netdev_priv(netdev);
2489
2490 cancel_work_sync(&enic->reset);
2491 cancel_work_sync(&enic->change_mtu_work);
2492 unregister_netdev(netdev);
2493 enic_dev_deinit(enic);
2494 vnic_dev_close(enic->vdev);
2495 vnic_dev_unregister(enic->vdev);
2496 enic_iounmap(enic);
2497 pci_release_regions(pdev);
2498 pci_disable_device(pdev);
2499 pci_set_drvdata(pdev, NULL);
2500 free_netdev(netdev);
2501 }
2502 }
2503
2504 static struct pci_driver enic_driver = {
2505 .name = DRV_NAME,
2506 .id_table = enic_id_table,
2507 .probe = enic_probe,
2508 .remove = __devexit_p(enic_remove),
2509 };
2510
2511 static int __init enic_init_module(void)
2512 {
2513 pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2514
2515 return pci_register_driver(&enic_driver);
2516 }
2517
2518 static void __exit enic_cleanup_module(void)
2519 {
2520 pci_unregister_driver(&enic_driver);
2521 }
2522
2523 module_init(enic_init_module);
2524 module_exit(enic_cleanup_module);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree