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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / scsi / fnic / fnic_main.c
blob18584ab27c3293c24891607cb028449801d3d8b3
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 #include <linux/module.h>
19 #include <linux/mempool.h>
20 #include <linux/string.h>
21 #include <linux/slab.h>
22 #include <linux/errno.h>
23 #include <linux/init.h>
24 #include <linux/pci.h>
25 #include <linux/skbuff.h>
26 #include <linux/interrupt.h>
27 #include <linux/spinlock.h>
28 #include <linux/workqueue.h>
29 #include <linux/if_ether.h>
30 #include <scsi/fc/fc_fip.h>
31 #include <scsi/scsi_host.h>
32 #include <scsi/scsi_transport.h>
33 #include <scsi/scsi_transport_fc.h>
34 #include <scsi/scsi_tcq.h>
35 #include <scsi/libfc.h>
36 #include <scsi/fc_frame.h>
37
38 #include "vnic_dev.h"
39 #include "vnic_intr.h"
40 #include "vnic_stats.h"
41 #include "fnic_io.h"
42 #include "fnic_fip.h"
43 #include "fnic.h"
44
45 #define PCI_DEVICE_ID_CISCO_FNIC 0x0045
46
47 /* Timer to poll notification area for events. Used for MSI interrupts */
48 #define FNIC_NOTIFY_TIMER_PERIOD (2 * HZ)
49
50 static struct kmem_cache *fnic_sgl_cache[FNIC_SGL_NUM_CACHES];
51 static struct kmem_cache *fnic_io_req_cache;
52 LIST_HEAD(fnic_list);
53 DEFINE_SPINLOCK(fnic_list_lock);
54
55 /* Supported devices by fnic module */
56 static struct pci_device_id fnic_id_table[] = {
57 { PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_FNIC) },
58 { 0, }
59 };
60
61 MODULE_DESCRIPTION(DRV_DESCRIPTION);
62 MODULE_AUTHOR("Abhijeet Joglekar <abjoglek@cisco.com>, "
63 "Joseph R. Eykholt <jeykholt@cisco.com>");
64 MODULE_LICENSE("GPL v2");
65 MODULE_VERSION(DRV_VERSION);
66 MODULE_DEVICE_TABLE(pci, fnic_id_table);
67
68 unsigned int fnic_log_level;
69 module_param(fnic_log_level, int, S_IRUGO|S_IWUSR);
70 MODULE_PARM_DESC(fnic_log_level, "bit mask of fnic logging levels");
71
72
73 unsigned int io_completions = FNIC_DFLT_IO_COMPLETIONS;
74 module_param(io_completions, int, S_IRUGO|S_IWUSR);
75 MODULE_PARM_DESC(io_completions, "Max CQ entries to process at a time");
76
77 unsigned int fnic_trace_max_pages = 16;
78 module_param(fnic_trace_max_pages, uint, S_IRUGO|S_IWUSR);
79 MODULE_PARM_DESC(fnic_trace_max_pages, "Total allocated memory pages "
80 "for fnic trace buffer");
81
82 unsigned int fnic_fc_trace_max_pages = 64;
83 module_param(fnic_fc_trace_max_pages, uint, S_IRUGO|S_IWUSR);
84 MODULE_PARM_DESC(fnic_fc_trace_max_pages,
85 "Total allocated memory pages for fc trace buffer");
86
87 static unsigned int fnic_max_qdepth = FNIC_DFLT_QUEUE_DEPTH;
88 module_param(fnic_max_qdepth, uint, S_IRUGO|S_IWUSR);
89 MODULE_PARM_DESC(fnic_max_qdepth, "Queue depth to report for each LUN");
90
91 static struct libfc_function_template fnic_transport_template = {
92 .frame_send = fnic_send,
93 .lport_set_port_id = fnic_set_port_id,
94 .fcp_abort_io = fnic_empty_scsi_cleanup,
95 .fcp_cleanup = fnic_empty_scsi_cleanup,
96 .exch_mgr_reset = fnic_exch_mgr_reset
97 };
98
99 static int fnic_slave_alloc(struct scsi_device *sdev)
100 {
101 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
102
103 if (!rport || fc_remote_port_chkready(rport))
104 return -ENXIO;
105
106 scsi_change_queue_depth(sdev, fnic_max_qdepth);
107 return 0;
108 }
109
110 static struct scsi_host_template fnic_host_template = {
111 .module = THIS_MODULE,
112 .name = DRV_NAME,
113 .queuecommand = fnic_queuecommand,
114 .eh_timed_out = fc_eh_timed_out,
115 .eh_abort_handler = fnic_abort_cmd,
116 .eh_device_reset_handler = fnic_device_reset,
117 .eh_host_reset_handler = fnic_host_reset,
118 .slave_alloc = fnic_slave_alloc,
119 .change_queue_depth = scsi_change_queue_depth,
120 .this_id = -1,
121 .cmd_per_lun = 3,
122 .can_queue = FNIC_DFLT_IO_REQ,
123 .sg_tablesize = FNIC_MAX_SG_DESC_CNT,
124 .max_sectors = 0xffff,
125 .shost_attrs = fnic_attrs,
126 .track_queue_depth = 1,
127 };
128
129 static void
130 fnic_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
131 {
132 if (timeout)
133 rport->dev_loss_tmo = timeout;
134 else
135 rport->dev_loss_tmo = 1;
136 }
137
138 static void fnic_get_host_speed(struct Scsi_Host *shost);
139 static struct scsi_transport_template *fnic_fc_transport;
140 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *);
141 static void fnic_reset_host_stats(struct Scsi_Host *);
142
143 static struct fc_function_template fnic_fc_functions = {
144
145 .show_host_node_name = 1,
146 .show_host_port_name = 1,
147 .show_host_supported_classes = 1,
148 .show_host_supported_fc4s = 1,
149 .show_host_active_fc4s = 1,
150 .show_host_maxframe_size = 1,
151 .show_host_port_id = 1,
152 .show_host_supported_speeds = 1,
153 .get_host_speed = fnic_get_host_speed,
154 .show_host_speed = 1,
155 .show_host_port_type = 1,
156 .get_host_port_state = fc_get_host_port_state,
157 .show_host_port_state = 1,
158 .show_host_symbolic_name = 1,
159 .show_rport_maxframe_size = 1,
160 .show_rport_supported_classes = 1,
161 .show_host_fabric_name = 1,
162 .show_starget_node_name = 1,
163 .show_starget_port_name = 1,
164 .show_starget_port_id = 1,
165 .show_rport_dev_loss_tmo = 1,
166 .set_rport_dev_loss_tmo = fnic_set_rport_dev_loss_tmo,
167 .issue_fc_host_lip = fnic_reset,
168 .get_fc_host_stats = fnic_get_stats,
169 .reset_fc_host_stats = fnic_reset_host_stats,
170 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
171 .terminate_rport_io = fnic_terminate_rport_io,
172 .bsg_request = fc_lport_bsg_request,
173 };
174
175 static void fnic_get_host_speed(struct Scsi_Host *shost)
176 {
177 struct fc_lport *lp = shost_priv(shost);
178 struct fnic *fnic = lport_priv(lp);
179 u32 port_speed = vnic_dev_port_speed(fnic->vdev);
180
181 /* Add in other values as they get defined in fw */
182 switch (port_speed) {
183 case DCEM_PORTSPEED_10G:
184 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
185 break;
186 case DCEM_PORTSPEED_20G:
187 fc_host_speed(shost) = FC_PORTSPEED_20GBIT;
188 break;
189 case DCEM_PORTSPEED_25G:
190 fc_host_speed(shost) = FC_PORTSPEED_25GBIT;
191 break;
192 case DCEM_PORTSPEED_40G:
193 case DCEM_PORTSPEED_4x10G:
194 fc_host_speed(shost) = FC_PORTSPEED_40GBIT;
195 break;
196 case DCEM_PORTSPEED_100G:
197 fc_host_speed(shost) = FC_PORTSPEED_100GBIT;
198 break;
199 default:
200 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
201 break;
202 }
203 }
204
205 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host)
206 {
207 int ret;
208 struct fc_lport *lp = shost_priv(host);
209 struct fnic *fnic = lport_priv(lp);
210 struct fc_host_statistics *stats = &lp->host_stats;
211 struct vnic_stats *vs;
212 unsigned long flags;
213
214 if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT))
215 return stats;
216 fnic->stats_time = jiffies;
217
218 spin_lock_irqsave(&fnic->fnic_lock, flags);
219 ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
220 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
221
222 if (ret) {
223 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
224 "fnic: Get vnic stats failed"
225 " 0x%x", ret);
226 return stats;
227 }
228 vs = fnic->stats;
229 stats->tx_frames = vs->tx.tx_unicast_frames_ok;
230 stats->tx_words = vs->tx.tx_unicast_bytes_ok / 4;
231 stats->rx_frames = vs->rx.rx_unicast_frames_ok;
232 stats->rx_words = vs->rx.rx_unicast_bytes_ok / 4;
233 stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors;
234 stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop;
235 stats->invalid_crc_count = vs->rx.rx_crc_errors;
236 stats->seconds_since_last_reset =
237 (jiffies - fnic->stats_reset_time) / HZ;
238 stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000);
239 stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000);
240
241 return stats;
242 }
243
244 /*
245 * fnic_dump_fchost_stats
246 * note : dumps fc_statistics into system logs
247 */
248 void fnic_dump_fchost_stats(struct Scsi_Host *host,
249 struct fc_host_statistics *stats)
250 {
251 FNIC_MAIN_NOTE(KERN_NOTICE, host,
252 "fnic: seconds since last reset = %llu\n",
253 stats->seconds_since_last_reset);
254 FNIC_MAIN_NOTE(KERN_NOTICE, host,
255 "fnic: tx frames = %llu\n",
256 stats->tx_frames);
257 FNIC_MAIN_NOTE(KERN_NOTICE, host,
258 "fnic: tx words = %llu\n",
259 stats->tx_words);
260 FNIC_MAIN_NOTE(KERN_NOTICE, host,
261 "fnic: rx frames = %llu\n",
262 stats->rx_frames);
263 FNIC_MAIN_NOTE(KERN_NOTICE, host,
264 "fnic: rx words = %llu\n",
265 stats->rx_words);
266 FNIC_MAIN_NOTE(KERN_NOTICE, host,
267 "fnic: lip count = %llu\n",
268 stats->lip_count);
269 FNIC_MAIN_NOTE(KERN_NOTICE, host,
270 "fnic: nos count = %llu\n",
271 stats->nos_count);
272 FNIC_MAIN_NOTE(KERN_NOTICE, host,
273 "fnic: error frames = %llu\n",
274 stats->error_frames);
275 FNIC_MAIN_NOTE(KERN_NOTICE, host,
276 "fnic: dumped frames = %llu\n",
277 stats->dumped_frames);
278 FNIC_MAIN_NOTE(KERN_NOTICE, host,
279 "fnic: link failure count = %llu\n",
280 stats->link_failure_count);
281 FNIC_MAIN_NOTE(KERN_NOTICE, host,
282 "fnic: loss of sync count = %llu\n",
283 stats->loss_of_sync_count);
284 FNIC_MAIN_NOTE(KERN_NOTICE, host,
285 "fnic: loss of signal count = %llu\n",
286 stats->loss_of_signal_count);
287 FNIC_MAIN_NOTE(KERN_NOTICE, host,
288 "fnic: prim seq protocol err count = %llu\n",
289 stats->prim_seq_protocol_err_count);
290 FNIC_MAIN_NOTE(KERN_NOTICE, host,
291 "fnic: invalid tx word count= %llu\n",
292 stats->invalid_tx_word_count);
293 FNIC_MAIN_NOTE(KERN_NOTICE, host,
294 "fnic: invalid crc count = %llu\n",
295 stats->invalid_crc_count);
296 FNIC_MAIN_NOTE(KERN_NOTICE, host,
297 "fnic: fcp input requests = %llu\n",
298 stats->fcp_input_requests);
299 FNIC_MAIN_NOTE(KERN_NOTICE, host,
300 "fnic: fcp output requests = %llu\n",
301 stats->fcp_output_requests);
302 FNIC_MAIN_NOTE(KERN_NOTICE, host,
303 "fnic: fcp control requests = %llu\n",
304 stats->fcp_control_requests);
305 FNIC_MAIN_NOTE(KERN_NOTICE, host,
306 "fnic: fcp input megabytes = %llu\n",
307 stats->fcp_input_megabytes);
308 FNIC_MAIN_NOTE(KERN_NOTICE, host,
309 "fnic: fcp output megabytes = %llu\n",
310 stats->fcp_output_megabytes);
311 return;
312 }
313
314 /*
315 * fnic_reset_host_stats : clears host stats
316 * note : called when reset_statistics set under sysfs dir
317 */
318 static void fnic_reset_host_stats(struct Scsi_Host *host)
319 {
320 int ret;
321 struct fc_lport *lp = shost_priv(host);
322 struct fnic *fnic = lport_priv(lp);
323 struct fc_host_statistics *stats;
324 unsigned long flags;
325
326 /* dump current stats, before clearing them */
327 stats = fnic_get_stats(host);
328 fnic_dump_fchost_stats(host, stats);
329
330 spin_lock_irqsave(&fnic->fnic_lock, flags);
331 ret = vnic_dev_stats_clear(fnic->vdev);
332 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
333
334 if (ret) {
335 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
336 "fnic: Reset vnic stats failed"
337 " 0x%x", ret);
338 return;
339 }
340 fnic->stats_reset_time = jiffies;
341 memset(stats, 0, sizeof(*stats));
342
343 return;
344 }
345
346 void fnic_log_q_error(struct fnic *fnic)
347 {
348 unsigned int i;
349 u32 error_status;
350
351 for (i = 0; i < fnic->raw_wq_count; i++) {
352 error_status = ioread32(&fnic->wq[i].ctrl->error_status);
353 if (error_status)
354 shost_printk(KERN_ERR, fnic->lport->host,
355 "WQ[%d] error_status"
356 " %d\n", i, error_status);
357 }
358
359 for (i = 0; i < fnic->rq_count; i++) {
360 error_status = ioread32(&fnic->rq[i].ctrl->error_status);
361 if (error_status)
362 shost_printk(KERN_ERR, fnic->lport->host,
363 "RQ[%d] error_status"
364 " %d\n", i, error_status);
365 }
366
367 for (i = 0; i < fnic->wq_copy_count; i++) {
368 error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status);
369 if (error_status)
370 shost_printk(KERN_ERR, fnic->lport->host,
371 "CWQ[%d] error_status"
372 " %d\n", i, error_status);
373 }
374 }
375
376 void fnic_handle_link_event(struct fnic *fnic)
377 {
378 unsigned long flags;
379
380 spin_lock_irqsave(&fnic->fnic_lock, flags);
381 if (fnic->stop_rx_link_events) {
382 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
383 return;
384 }
385 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
386
387 queue_work(fnic_event_queue, &fnic->link_work);
388
389 }
390
391 static int fnic_notify_set(struct fnic *fnic)
392 {
393 int err;
394
395 switch (vnic_dev_get_intr_mode(fnic->vdev)) {
396 case VNIC_DEV_INTR_MODE_INTX:
397 err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY);
398 break;
399 case VNIC_DEV_INTR_MODE_MSI:
400 err = vnic_dev_notify_set(fnic->vdev, -1);
401 break;
402 case VNIC_DEV_INTR_MODE_MSIX:
403 err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY);
404 break;
405 default:
406 shost_printk(KERN_ERR, fnic->lport->host,
407 "Interrupt mode should be set up"
408 " before devcmd notify set %d\n",
409 vnic_dev_get_intr_mode(fnic->vdev));
410 err = -1;
411 break;
412 }
413
414 return err;
415 }
416
417 static void fnic_notify_timer(struct timer_list *t)
418 {
419 struct fnic *fnic = from_timer(fnic, t, notify_timer);
420
421 fnic_handle_link_event(fnic);
422 mod_timer(&fnic->notify_timer,
423 round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));
424 }
425
426 static void fnic_fip_notify_timer(struct timer_list *t)
427 {
428 struct fnic *fnic = from_timer(fnic, t, fip_timer);
429
430 fnic_handle_fip_timer(fnic);
431 }
432
433 static void fnic_notify_timer_start(struct fnic *fnic)
434 {
435 switch (vnic_dev_get_intr_mode(fnic->vdev)) {
436 case VNIC_DEV_INTR_MODE_MSI:
437 /*
438 * Schedule first timeout immediately. The driver is
439 * initiatialized and ready to look for link up notification
440 */
441 mod_timer(&fnic->notify_timer, jiffies);
442 break;
443 default:
444 /* Using intr for notification for INTx/MSI-X */
445 break;
446 };
447 }
448
449 static int fnic_dev_wait(struct vnic_dev *vdev,
450 int (*start)(struct vnic_dev *, int),
451 int (*finished)(struct vnic_dev *, int *),
452 int arg)
453 {
454 unsigned long time;
455 int done;
456 int err;
457 int count;
458
459 count = 0;
460
461 err = start(vdev, arg);
462 if (err)
463 return err;
464
465 /* Wait for func to complete.
466 * Sometime schedule_timeout_uninterruptible take long time
467 * to wake up so we do not retry as we are only waiting for
468 * 2 seconds in while loop. By adding count, we make sure
469 * we try atleast three times before returning -ETIMEDOUT
470 */
471 time = jiffies + (HZ * 2);
472 do {
473 err = finished(vdev, &done);
474 count++;
475 if (err)
476 return err;
477 if (done)
478 return 0;
479 schedule_timeout_uninterruptible(HZ / 10);
480 } while (time_after(time, jiffies) || (count < 3));
481
482 return -ETIMEDOUT;
483 }
484
485 static int fnic_cleanup(struct fnic *fnic)
486 {
487 unsigned int i;
488 int err;
489
490 vnic_dev_disable(fnic->vdev);
491 for (i = 0; i < fnic->intr_count; i++)
492 vnic_intr_mask(&fnic->intr[i]);
493
494 for (i = 0; i < fnic->rq_count; i++) {
495 err = vnic_rq_disable(&fnic->rq[i]);
496 if (err)
497 return err;
498 }
499 for (i = 0; i < fnic->raw_wq_count; i++) {
500 err = vnic_wq_disable(&fnic->wq[i]);
501 if (err)
502 return err;
503 }
504 for (i = 0; i < fnic->wq_copy_count; i++) {
505 err = vnic_wq_copy_disable(&fnic->wq_copy[i]);
506 if (err)
507 return err;
508 }
509
510 /* Clean up completed IOs and FCS frames */
511 fnic_wq_copy_cmpl_handler(fnic, io_completions);
512 fnic_wq_cmpl_handler(fnic, -1);
513 fnic_rq_cmpl_handler(fnic, -1);
514
515 /* Clean up the IOs and FCS frames that have not completed */
516 for (i = 0; i < fnic->raw_wq_count; i++)
517 vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf);
518 for (i = 0; i < fnic->rq_count; i++)
519 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
520 for (i = 0; i < fnic->wq_copy_count; i++)
521 vnic_wq_copy_clean(&fnic->wq_copy[i],
522 fnic_wq_copy_cleanup_handler);
523
524 for (i = 0; i < fnic->cq_count; i++)
525 vnic_cq_clean(&fnic->cq[i]);
526 for (i = 0; i < fnic->intr_count; i++)
527 vnic_intr_clean(&fnic->intr[i]);
528
529 mempool_destroy(fnic->io_req_pool);
530 for (i = 0; i < FNIC_SGL_NUM_CACHES; i++)
531 mempool_destroy(fnic->io_sgl_pool[i]);
532
533 return 0;
534 }
535
536 static void fnic_iounmap(struct fnic *fnic)
537 {
538 if (fnic->bar0.vaddr)
539 iounmap(fnic->bar0.vaddr);
540 }
541
542 /**
543 * fnic_get_mac() - get assigned data MAC address for FIP code.
544 * @lport: local port.
545 */
546 static u8 *fnic_get_mac(struct fc_lport *lport)
547 {
548 struct fnic *fnic = lport_priv(lport);
549
550 return fnic->data_src_addr;
551 }
552
553 static void fnic_set_vlan(struct fnic *fnic, u16 vlan_id)
554 {
555 u16 old_vlan;
556 old_vlan = vnic_dev_set_default_vlan(fnic->vdev, vlan_id);
557 }
558
559 static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
560 {
561 struct Scsi_Host *host;
562 struct fc_lport *lp;
563 struct fnic *fnic;
564 mempool_t *pool;
565 int err;
566 int i;
567 unsigned long flags;
568
569 /*
570 * Allocate SCSI Host and set up association between host,
571 * local port, and fnic
572 */
573 lp = libfc_host_alloc(&fnic_host_template, sizeof(struct fnic));
574 if (!lp) {
575 printk(KERN_ERR PFX "Unable to alloc libfc local port\n");
576 err = -ENOMEM;
577 goto err_out;
578 }
579 host = lp->host;
580 fnic = lport_priv(lp);
581 fnic->lport = lp;
582 fnic->ctlr.lp = lp;
583
584 snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME,
585 host->host_no);
586
587 host->transportt = fnic_fc_transport;
588
589 fnic_stats_debugfs_init(fnic);
590
591 /* Setup PCI resources */
592 pci_set_drvdata(pdev, fnic);
593
594 fnic->pdev = pdev;
595
596 err = pci_enable_device(pdev);
597 if (err) {
598 shost_printk(KERN_ERR, fnic->lport->host,
599 "Cannot enable PCI device, aborting.\n");
600 goto err_out_free_hba;
601 }
602
603 err = pci_request_regions(pdev, DRV_NAME);
604 if (err) {
605 shost_printk(KERN_ERR, fnic->lport->host,
606 "Cannot enable PCI resources, aborting\n");
607 goto err_out_disable_device;
608 }
609
610 pci_set_master(pdev);
611
612 /* Query PCI controller on system for DMA addressing
613 * limitation for the device. Try 64-bit first, and
614 * fail to 32-bit.
615 */
616 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
617 if (err) {
618 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
619 if (err) {
620 shost_printk(KERN_ERR, fnic->lport->host,
621 "No usable DMA configuration "
622 "aborting\n");
623 goto err_out_release_regions;
624 }
625 }
626
627 /* Map vNIC resources from BAR0 */
628 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
629 shost_printk(KERN_ERR, fnic->lport->host,
630 "BAR0 not memory-map'able, aborting.\n");
631 err = -ENODEV;
632 goto err_out_release_regions;
633 }
634
635 fnic->bar0.vaddr = pci_iomap(pdev, 0, 0);
636 fnic->bar0.bus_addr = pci_resource_start(pdev, 0);
637 fnic->bar0.len = pci_resource_len(pdev, 0);
638
639 if (!fnic->bar0.vaddr) {
640 shost_printk(KERN_ERR, fnic->lport->host,
641 "Cannot memory-map BAR0 res hdr, "
642 "aborting.\n");
643 err = -ENODEV;
644 goto err_out_release_regions;
645 }
646
647 fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0);
648 if (!fnic->vdev) {
649 shost_printk(KERN_ERR, fnic->lport->host,
650 "vNIC registration failed, "
651 "aborting.\n");
652 err = -ENODEV;
653 goto err_out_iounmap;
654 }
655
656 err = vnic_dev_cmd_init(fnic->vdev);
657 if (err) {
658 shost_printk(KERN_ERR, fnic->lport->host,
659 "vnic_dev_cmd_init() returns %d, aborting\n",
660 err);
661 goto err_out_vnic_unregister;
662 }
663
664 err = fnic_dev_wait(fnic->vdev, vnic_dev_open,
665 vnic_dev_open_done, CMD_OPENF_RQ_ENABLE_THEN_POST);
666 if (err) {
667 shost_printk(KERN_ERR, fnic->lport->host,
668 "vNIC dev open failed, aborting.\n");
669 goto err_out_dev_cmd_deinit;
670 }
671
672 err = vnic_dev_init(fnic->vdev, 0);
673 if (err) {
674 shost_printk(KERN_ERR, fnic->lport->host,
675 "vNIC dev init failed, aborting.\n");
676 goto err_out_dev_close;
677 }
678
679 err = vnic_dev_mac_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
680 if (err) {
681 shost_printk(KERN_ERR, fnic->lport->host,
682 "vNIC get MAC addr failed \n");
683 goto err_out_dev_close;
684 }
685 /* set data_src for point-to-point mode and to keep it non-zero */
686 memcpy(fnic->data_src_addr, fnic->ctlr.ctl_src_addr, ETH_ALEN);
687
688 /* Get vNIC configuration */
689 err = fnic_get_vnic_config(fnic);
690 if (err) {
691 shost_printk(KERN_ERR, fnic->lport->host,
692 "Get vNIC configuration failed, "
693 "aborting.\n");
694 goto err_out_dev_close;
695 }
696
697 /* Configure Maximum Outstanding IO reqs*/
698 if (fnic->config.io_throttle_count != FNIC_UCSM_DFLT_THROTTLE_CNT_BLD) {
699 host->can_queue = min_t(u32, FNIC_MAX_IO_REQ,
700 max_t(u32, FNIC_MIN_IO_REQ,
701 fnic->config.io_throttle_count));
702 }
703 fnic->fnic_max_tag_id = host->can_queue;
704
705 host->max_lun = fnic->config.luns_per_tgt;
706 host->max_id = FNIC_MAX_FCP_TARGET;
707 host->max_cmd_len = FCOE_MAX_CMD_LEN;
708
709 fnic_get_res_counts(fnic);
710
711 err = fnic_set_intr_mode(fnic);
712 if (err) {
713 shost_printk(KERN_ERR, fnic->lport->host,
714 "Failed to set intr mode, "
715 "aborting.\n");
716 goto err_out_dev_close;
717 }
718
719 err = fnic_alloc_vnic_resources(fnic);
720 if (err) {
721 shost_printk(KERN_ERR, fnic->lport->host,
722 "Failed to alloc vNIC resources, "
723 "aborting.\n");
724 goto err_out_clear_intr;
725 }
726
727
728 /* initialize all fnic locks */
729 spin_lock_init(&fnic->fnic_lock);
730
731 for (i = 0; i < FNIC_WQ_MAX; i++)
732 spin_lock_init(&fnic->wq_lock[i]);
733
734 for (i = 0; i < FNIC_WQ_COPY_MAX; i++) {
735 spin_lock_init(&fnic->wq_copy_lock[i]);
736 fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK;
737 fnic->fw_ack_recd[i] = 0;
738 fnic->fw_ack_index[i] = -1;
739 }
740
741 for (i = 0; i < FNIC_IO_LOCKS; i++)
742 spin_lock_init(&fnic->io_req_lock[i]);
743
744 fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache);
745 if (!fnic->io_req_pool)
746 goto err_out_free_resources;
747
748 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
749 if (!pool)
750 goto err_out_free_ioreq_pool;
751 fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool;
752
753 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
754 if (!pool)
755 goto err_out_free_dflt_pool;
756 fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool;
757
758 /* setup vlan config, hw inserts vlan header */
759 fnic->vlan_hw_insert = 1;
760 fnic->vlan_id = 0;
761
762 /* Initialize the FIP fcoe_ctrl struct */
763 fnic->ctlr.send = fnic_eth_send;
764 fnic->ctlr.update_mac = fnic_update_mac;
765 fnic->ctlr.get_src_addr = fnic_get_mac;
766 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
767 shost_printk(KERN_INFO, fnic->lport->host,
768 "firmware supports FIP\n");
769 /* enable directed and multicast */
770 vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0);
771 vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS);
772 vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
773 fnic->set_vlan = fnic_set_vlan;
774 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO);
775 timer_setup(&fnic->fip_timer, fnic_fip_notify_timer, 0);
776 spin_lock_init(&fnic->vlans_lock);
777 INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame);
778 INIT_WORK(&fnic->event_work, fnic_handle_event);
779 skb_queue_head_init(&fnic->fip_frame_queue);
780 INIT_LIST_HEAD(&fnic->evlist);
781 INIT_LIST_HEAD(&fnic->vlans);
782 } else {
783 shost_printk(KERN_INFO, fnic->lport->host,
784 "firmware uses non-FIP mode\n");
785 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP);
786 fnic->ctlr.state = FIP_ST_NON_FIP;
787 }
788 fnic->state = FNIC_IN_FC_MODE;
789
790 atomic_set(&fnic->in_flight, 0);
791 fnic->state_flags = FNIC_FLAGS_NONE;
792
793 /* Enable hardware stripping of vlan header on ingress */
794 fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1);
795
796 /* Setup notification buffer area */
797 err = fnic_notify_set(fnic);
798 if (err) {
799 shost_printk(KERN_ERR, fnic->lport->host,
800 "Failed to alloc notify buffer, aborting.\n");
801 goto err_out_free_max_pool;
802 }
803
804 /* Setup notify timer when using MSI interrupts */
805 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
806 timer_setup(&fnic->notify_timer, fnic_notify_timer, 0);
807
808 /* allocate RQ buffers and post them to RQ*/
809 for (i = 0; i < fnic->rq_count; i++) {
810 vnic_rq_enable(&fnic->rq[i]);
811 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
812 if (err) {
813 shost_printk(KERN_ERR, fnic->lport->host,
814 "fnic_alloc_rq_frame can't alloc "
815 "frame\n");
816 goto err_out_free_rq_buf;
817 }
818 }
819
820 /*
821 * Initialization done with PCI system, hardware, firmware.
822 * Add host to SCSI
823 */
824 err = scsi_add_host(lp->host, &pdev->dev);
825 if (err) {
826 shost_printk(KERN_ERR, fnic->lport->host,
827 "fnic: scsi_add_host failed...exiting\n");
828 goto err_out_free_rq_buf;
829 }
830
831 /* Start local port initiatialization */
832
833 lp->link_up = 0;
834
835 lp->max_retry_count = fnic->config.flogi_retries;
836 lp->max_rport_retry_count = fnic->config.plogi_retries;
837 lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
838 FCP_SPPF_CONF_COMPL);
839 if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR)
840 lp->service_params |= FCP_SPPF_RETRY;
841
842 lp->boot_time = jiffies;
843 lp->e_d_tov = fnic->config.ed_tov;
844 lp->r_a_tov = fnic->config.ra_tov;
845 lp->link_supported_speeds = FC_PORTSPEED_10GBIT;
846 fc_set_wwnn(lp, fnic->config.node_wwn);
847 fc_set_wwpn(lp, fnic->config.port_wwn);
848
849 fcoe_libfc_config(lp, &fnic->ctlr, &fnic_transport_template, 0);
850
851 if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START,
852 FCPIO_HOST_EXCH_RANGE_END, NULL)) {
853 err = -ENOMEM;
854 goto err_out_remove_scsi_host;
855 }
856
857 fc_lport_init_stats(lp);
858 fnic->stats_reset_time = jiffies;
859
860 fc_lport_config(lp);
861
862 if (fc_set_mfs(lp, fnic->config.maxdatafieldsize +
863 sizeof(struct fc_frame_header))) {
864 err = -EINVAL;
865 goto err_out_free_exch_mgr;
866 }
867 fc_host_maxframe_size(lp->host) = lp->mfs;
868 fc_host_dev_loss_tmo(lp->host) = fnic->config.port_down_timeout / 1000;
869
870 sprintf(fc_host_symbolic_name(lp->host),
871 DRV_NAME " v" DRV_VERSION " over %s", fnic->name);
872
873 spin_lock_irqsave(&fnic_list_lock, flags);
874 list_add_tail(&fnic->list, &fnic_list);
875 spin_unlock_irqrestore(&fnic_list_lock, flags);
876
877 INIT_WORK(&fnic->link_work, fnic_handle_link);
878 INIT_WORK(&fnic->frame_work, fnic_handle_frame);
879 skb_queue_head_init(&fnic->frame_queue);
880 skb_queue_head_init(&fnic->tx_queue);
881
882 /* Enable all queues */
883 for (i = 0; i < fnic->raw_wq_count; i++)
884 vnic_wq_enable(&fnic->wq[i]);
885 for (i = 0; i < fnic->wq_copy_count; i++)
886 vnic_wq_copy_enable(&fnic->wq_copy[i]);
887
888 fc_fabric_login(lp);
889
890 err = fnic_request_intr(fnic);
891 if (err) {
892 shost_printk(KERN_ERR, fnic->lport->host,
893 "Unable to request irq.\n");
894 goto err_out_free_exch_mgr;
895 }
896
897 vnic_dev_enable(fnic->vdev);
898
899 for (i = 0; i < fnic->intr_count; i++)
900 vnic_intr_unmask(&fnic->intr[i]);
901
902 fnic_notify_timer_start(fnic);
903
904 return 0;
905
906 err_out_free_exch_mgr:
907 fc_exch_mgr_free(lp);
908 err_out_remove_scsi_host:
909 fc_remove_host(lp->host);
910 scsi_remove_host(lp->host);
911 err_out_free_rq_buf:
912 for (i = 0; i < fnic->rq_count; i++)
913 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
914 vnic_dev_notify_unset(fnic->vdev);
915 err_out_free_max_pool:
916 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]);
917 err_out_free_dflt_pool:
918 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]);
919 err_out_free_ioreq_pool:
920 mempool_destroy(fnic->io_req_pool);
921 err_out_free_resources:
922 fnic_free_vnic_resources(fnic);
923 err_out_clear_intr:
924 fnic_clear_intr_mode(fnic);
925 err_out_dev_close:
926 vnic_dev_close(fnic->vdev);
927 err_out_dev_cmd_deinit:
928 err_out_vnic_unregister:
929 vnic_dev_unregister(fnic->vdev);
930 err_out_iounmap:
931 fnic_iounmap(fnic);
932 err_out_release_regions:
933 pci_release_regions(pdev);
934 err_out_disable_device:
935 pci_disable_device(pdev);
936 err_out_free_hba:
937 fnic_stats_debugfs_remove(fnic);
938 scsi_host_put(lp->host);
939 err_out:
940 return err;
941 }
942
943 static void fnic_remove(struct pci_dev *pdev)
944 {
945 struct fnic *fnic = pci_get_drvdata(pdev);
946 struct fc_lport *lp = fnic->lport;
947 unsigned long flags;
948
949 /*
950 * Mark state so that the workqueue thread stops forwarding
951 * received frames and link events to the local port. ISR and
952 * other threads that can queue work items will also stop
953 * creating work items on the fnic workqueue
954 */
955 spin_lock_irqsave(&fnic->fnic_lock, flags);
956 fnic->stop_rx_link_events = 1;
957 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
958
959 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
960 del_timer_sync(&fnic->notify_timer);
961
962 /*
963 * Flush the fnic event queue. After this call, there should
964 * be no event queued for this fnic device in the workqueue
965 */
966 flush_workqueue(fnic_event_queue);
967 skb_queue_purge(&fnic->frame_queue);
968 skb_queue_purge(&fnic->tx_queue);
969
970 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
971 del_timer_sync(&fnic->fip_timer);
972 skb_queue_purge(&fnic->fip_frame_queue);
973 fnic_fcoe_reset_vlans(fnic);
974 fnic_fcoe_evlist_free(fnic);
975 }
976
977 /*
978 * Log off the fabric. This stops all remote ports, dns port,
979 * logs off the fabric. This flushes all rport, disc, lport work
980 * before returning
981 */
982 fc_fabric_logoff(fnic->lport);
983
984 spin_lock_irqsave(&fnic->fnic_lock, flags);
985 fnic->in_remove = 1;
986 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
987
988 fcoe_ctlr_destroy(&fnic->ctlr);
989 fc_lport_destroy(lp);
990 fnic_stats_debugfs_remove(fnic);
991
992 /*
993 * This stops the fnic device, masks all interrupts. Completed
994 * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are
995 * cleaned up
996 */
997 fnic_cleanup(fnic);
998
999 BUG_ON(!skb_queue_empty(&fnic->frame_queue));
1000 BUG_ON(!skb_queue_empty(&fnic->tx_queue));
1001
1002 spin_lock_irqsave(&fnic_list_lock, flags);
1003 list_del(&fnic->list);
1004 spin_unlock_irqrestore(&fnic_list_lock, flags);
1005
1006 fc_remove_host(fnic->lport->host);
1007 scsi_remove_host(fnic->lport->host);
1008 fc_exch_mgr_free(fnic->lport);
1009 vnic_dev_notify_unset(fnic->vdev);
1010 fnic_free_intr(fnic);
1011 fnic_free_vnic_resources(fnic);
1012 fnic_clear_intr_mode(fnic);
1013 vnic_dev_close(fnic->vdev);
1014 vnic_dev_unregister(fnic->vdev);
1015 fnic_iounmap(fnic);
1016 pci_release_regions(pdev);
1017 pci_disable_device(pdev);
1018 scsi_host_put(lp->host);
1019 }
1020
1021 static struct pci_driver fnic_driver = {
1022 .name = DRV_NAME,
1023 .id_table = fnic_id_table,
1024 .probe = fnic_probe,
1025 .remove = fnic_remove,
1026 };
1027
1028 static int __init fnic_init_module(void)
1029 {
1030 size_t len;
1031 int err = 0;
1032
1033 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
1034
1035 /* Create debugfs entries for fnic */
1036 err = fnic_debugfs_init();
1037 if (err < 0) {
1038 printk(KERN_ERR PFX "Failed to create fnic directory "
1039 "for tracing and stats logging\n");
1040 fnic_debugfs_terminate();
1041 }
1042
1043 /* Allocate memory for trace buffer */
1044 err = fnic_trace_buf_init();
1045 if (err < 0) {
1046 printk(KERN_ERR PFX
1047 "Trace buffer initialization Failed. "
1048 "Fnic Tracing utility is disabled\n");
1049 fnic_trace_free();
1050 }
1051
1052 /* Allocate memory for fc trace buffer */
1053 err = fnic_fc_trace_init();
1054 if (err < 0) {
1055 printk(KERN_ERR PFX "FC trace buffer initialization Failed "
1056 "FC frame tracing utility is disabled\n");
1057 fnic_fc_trace_free();
1058 }
1059
1060 /* Create a cache for allocation of default size sgls */
1061 len = sizeof(struct fnic_dflt_sgl_list);
1062 fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create
1063 ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
1064 SLAB_HWCACHE_ALIGN,
1065 NULL);
1066 if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) {
1067 printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n");
1068 err = -ENOMEM;
1069 goto err_create_fnic_sgl_slab_dflt;
1070 }
1071
1072 /* Create a cache for allocation of max size sgls*/
1073 len = sizeof(struct fnic_sgl_list);
1074 fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create
1075 ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
1076 SLAB_HWCACHE_ALIGN,
1077 NULL);
1078 if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) {
1079 printk(KERN_ERR PFX "failed to create fnic max sgl slab\n");
1080 err = -ENOMEM;
1081 goto err_create_fnic_sgl_slab_max;
1082 }
1083
1084 /* Create a cache of io_req structs for use via mempool */
1085 fnic_io_req_cache = kmem_cache_create("fnic_io_req",
1086 sizeof(struct fnic_io_req),
1087 0, SLAB_HWCACHE_ALIGN, NULL);
1088 if (!fnic_io_req_cache) {
1089 printk(KERN_ERR PFX "failed to create fnic io_req slab\n");
1090 err = -ENOMEM;
1091 goto err_create_fnic_ioreq_slab;
1092 }
1093
1094 fnic_event_queue = create_singlethread_workqueue("fnic_event_wq");
1095 if (!fnic_event_queue) {
1096 printk(KERN_ERR PFX "fnic work queue create failed\n");
1097 err = -ENOMEM;
1098 goto err_create_fnic_workq;
1099 }
1100
1101 spin_lock_init(&fnic_list_lock);
1102 INIT_LIST_HEAD(&fnic_list);
1103
1104 fnic_fip_queue = create_singlethread_workqueue("fnic_fip_q");
1105 if (!fnic_fip_queue) {
1106 printk(KERN_ERR PFX "fnic FIP work queue create failed\n");
1107 err = -ENOMEM;
1108 goto err_create_fip_workq;
1109 }
1110
1111 fnic_fc_transport = fc_attach_transport(&fnic_fc_functions);
1112 if (!fnic_fc_transport) {
1113 printk(KERN_ERR PFX "fc_attach_transport error\n");
1114 err = -ENOMEM;
1115 goto err_fc_transport;
1116 }
1117
1118 /* register the driver with PCI system */
1119 err = pci_register_driver(&fnic_driver);
1120 if (err < 0) {
1121 printk(KERN_ERR PFX "pci register error\n");
1122 goto err_pci_register;
1123 }
1124 return err;
1125
1126 err_pci_register:
1127 fc_release_transport(fnic_fc_transport);
1128 err_fc_transport:
1129 destroy_workqueue(fnic_fip_queue);
1130 err_create_fip_workq:
1131 destroy_workqueue(fnic_event_queue);
1132 err_create_fnic_workq:
1133 kmem_cache_destroy(fnic_io_req_cache);
1134 err_create_fnic_ioreq_slab:
1135 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
1136 err_create_fnic_sgl_slab_max:
1137 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
1138 err_create_fnic_sgl_slab_dflt:
1139 fnic_trace_free();
1140 fnic_fc_trace_free();
1141 fnic_debugfs_terminate();
1142 return err;
1143 }
1144
1145 static void __exit fnic_cleanup_module(void)
1146 {
1147 pci_unregister_driver(&fnic_driver);
1148 destroy_workqueue(fnic_event_queue);
1149 if (fnic_fip_queue) {
1150 flush_workqueue(fnic_fip_queue);
1151 destroy_workqueue(fnic_fip_queue);
1152 }
1153 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
1154 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
1155 kmem_cache_destroy(fnic_io_req_cache);
1156 fc_release_transport(fnic_fc_transport);
1157 fnic_trace_free();
1158 fnic_fc_trace_free();
1159 fnic_debugfs_terminate();
1160 }
1161
1162 module_init(fnic_init_module);
1163 module_exit(fnic_cleanup_module);
1164
Linux with added FPC-III support