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of: MSI: Simplify irqdomain lookup
[linux/fpc-iii.git] / drivers / scsi / fnic / fnic_main.c
blob58ce9020d69c5882eebfa46f3ec685fb7b63fef6
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 unsigned int fnic_trace_max_pages = 16;
73 module_param(fnic_trace_max_pages, uint, S_IRUGO|S_IWUSR);
74 MODULE_PARM_DESC(fnic_trace_max_pages, "Total allocated memory pages "
75 "for fnic trace buffer");
76
77 unsigned int fnic_fc_trace_max_pages = 64;
78 module_param(fnic_fc_trace_max_pages, uint, S_IRUGO|S_IWUSR);
79 MODULE_PARM_DESC(fnic_fc_trace_max_pages,
80 "Total allocated memory pages for fc trace buffer");
81
82 static unsigned int fnic_max_qdepth = FNIC_DFLT_QUEUE_DEPTH;
83 module_param(fnic_max_qdepth, uint, S_IRUGO|S_IWUSR);
84 MODULE_PARM_DESC(fnic_max_qdepth, "Queue depth to report for each LUN");
85
86 static struct libfc_function_template fnic_transport_template = {
87 .frame_send = fnic_send,
88 .lport_set_port_id = fnic_set_port_id,
89 .fcp_abort_io = fnic_empty_scsi_cleanup,
90 .fcp_cleanup = fnic_empty_scsi_cleanup,
91 .exch_mgr_reset = fnic_exch_mgr_reset
92 };
93
94 static int fnic_slave_alloc(struct scsi_device *sdev)
95 {
96 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
97
98 if (!rport || fc_remote_port_chkready(rport))
99 return -ENXIO;
100
101 scsi_change_queue_depth(sdev, fnic_max_qdepth);
102 return 0;
103 }
104
105 static struct scsi_host_template fnic_host_template = {
106 .module = THIS_MODULE,
107 .name = DRV_NAME,
108 .queuecommand = fnic_queuecommand,
109 .eh_abort_handler = fnic_abort_cmd,
110 .eh_device_reset_handler = fnic_device_reset,
111 .eh_host_reset_handler = fnic_host_reset,
112 .slave_alloc = fnic_slave_alloc,
113 .change_queue_depth = scsi_change_queue_depth,
114 .this_id = -1,
115 .cmd_per_lun = 3,
116 .can_queue = FNIC_DFLT_IO_REQ,
117 .use_clustering = ENABLE_CLUSTERING,
118 .sg_tablesize = FNIC_MAX_SG_DESC_CNT,
119 .max_sectors = 0xffff,
120 .shost_attrs = fnic_attrs,
121 .track_queue_depth = 1,
122 };
123
124 static void
125 fnic_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
126 {
127 if (timeout)
128 rport->dev_loss_tmo = timeout;
129 else
130 rport->dev_loss_tmo = 1;
131 }
132
133 static void fnic_get_host_speed(struct Scsi_Host *shost);
134 static struct scsi_transport_template *fnic_fc_transport;
135 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *);
136 static void fnic_reset_host_stats(struct Scsi_Host *);
137
138 static struct fc_function_template fnic_fc_functions = {
139
140 .show_host_node_name = 1,
141 .show_host_port_name = 1,
142 .show_host_supported_classes = 1,
143 .show_host_supported_fc4s = 1,
144 .show_host_active_fc4s = 1,
145 .show_host_maxframe_size = 1,
146 .show_host_port_id = 1,
147 .show_host_supported_speeds = 1,
148 .get_host_speed = fnic_get_host_speed,
149 .show_host_speed = 1,
150 .show_host_port_type = 1,
151 .get_host_port_state = fc_get_host_port_state,
152 .show_host_port_state = 1,
153 .show_host_symbolic_name = 1,
154 .show_rport_maxframe_size = 1,
155 .show_rport_supported_classes = 1,
156 .show_host_fabric_name = 1,
157 .show_starget_node_name = 1,
158 .show_starget_port_name = 1,
159 .show_starget_port_id = 1,
160 .show_rport_dev_loss_tmo = 1,
161 .set_rport_dev_loss_tmo = fnic_set_rport_dev_loss_tmo,
162 .issue_fc_host_lip = fnic_reset,
163 .get_fc_host_stats = fnic_get_stats,
164 .reset_fc_host_stats = fnic_reset_host_stats,
165 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
166 .terminate_rport_io = fnic_terminate_rport_io,
167 .bsg_request = fc_lport_bsg_request,
168 };
169
170 static void fnic_get_host_speed(struct Scsi_Host *shost)
171 {
172 struct fc_lport *lp = shost_priv(shost);
173 struct fnic *fnic = lport_priv(lp);
174 u32 port_speed = vnic_dev_port_speed(fnic->vdev);
175
176 /* Add in other values as they get defined in fw */
177 switch (port_speed) {
178 case 10000:
179 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
180 break;
181 default:
182 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
183 break;
184 }
185 }
186
187 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host)
188 {
189 int ret;
190 struct fc_lport *lp = shost_priv(host);
191 struct fnic *fnic = lport_priv(lp);
192 struct fc_host_statistics *stats = &lp->host_stats;
193 struct vnic_stats *vs;
194 unsigned long flags;
195
196 if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT))
197 return stats;
198 fnic->stats_time = jiffies;
199
200 spin_lock_irqsave(&fnic->fnic_lock, flags);
201 ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
202 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
203
204 if (ret) {
205 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
206 "fnic: Get vnic stats failed"
207 " 0x%x", ret);
208 return stats;
209 }
210 vs = fnic->stats;
211 stats->tx_frames = vs->tx.tx_unicast_frames_ok;
212 stats->tx_words = vs->tx.tx_unicast_bytes_ok / 4;
213 stats->rx_frames = vs->rx.rx_unicast_frames_ok;
214 stats->rx_words = vs->rx.rx_unicast_bytes_ok / 4;
215 stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors;
216 stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop;
217 stats->invalid_crc_count = vs->rx.rx_crc_errors;
218 stats->seconds_since_last_reset =
219 (jiffies - fnic->stats_reset_time) / HZ;
220 stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000);
221 stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000);
222
223 return stats;
224 }
225
226 /*
227 * fnic_dump_fchost_stats
228 * note : dumps fc_statistics into system logs
229 */
230 void fnic_dump_fchost_stats(struct Scsi_Host *host,
231 struct fc_host_statistics *stats)
232 {
233 FNIC_MAIN_NOTE(KERN_NOTICE, host,
234 "fnic: seconds since last reset = %llu\n",
235 stats->seconds_since_last_reset);
236 FNIC_MAIN_NOTE(KERN_NOTICE, host,
237 "fnic: tx frames = %llu\n",
238 stats->tx_frames);
239 FNIC_MAIN_NOTE(KERN_NOTICE, host,
240 "fnic: tx words = %llu\n",
241 stats->tx_words);
242 FNIC_MAIN_NOTE(KERN_NOTICE, host,
243 "fnic: rx frames = %llu\n",
244 stats->rx_frames);
245 FNIC_MAIN_NOTE(KERN_NOTICE, host,
246 "fnic: rx words = %llu\n",
247 stats->rx_words);
248 FNIC_MAIN_NOTE(KERN_NOTICE, host,
249 "fnic: lip count = %llu\n",
250 stats->lip_count);
251 FNIC_MAIN_NOTE(KERN_NOTICE, host,
252 "fnic: nos count = %llu\n",
253 stats->nos_count);
254 FNIC_MAIN_NOTE(KERN_NOTICE, host,
255 "fnic: error frames = %llu\n",
256 stats->error_frames);
257 FNIC_MAIN_NOTE(KERN_NOTICE, host,
258 "fnic: dumped frames = %llu\n",
259 stats->dumped_frames);
260 FNIC_MAIN_NOTE(KERN_NOTICE, host,
261 "fnic: link failure count = %llu\n",
262 stats->link_failure_count);
263 FNIC_MAIN_NOTE(KERN_NOTICE, host,
264 "fnic: loss of sync count = %llu\n",
265 stats->loss_of_sync_count);
266 FNIC_MAIN_NOTE(KERN_NOTICE, host,
267 "fnic: loss of signal count = %llu\n",
268 stats->loss_of_signal_count);
269 FNIC_MAIN_NOTE(KERN_NOTICE, host,
270 "fnic: prim seq protocol err count = %llu\n",
271 stats->prim_seq_protocol_err_count);
272 FNIC_MAIN_NOTE(KERN_NOTICE, host,
273 "fnic: invalid tx word count= %llu\n",
274 stats->invalid_tx_word_count);
275 FNIC_MAIN_NOTE(KERN_NOTICE, host,
276 "fnic: invalid crc count = %llu\n",
277 stats->invalid_crc_count);
278 FNIC_MAIN_NOTE(KERN_NOTICE, host,
279 "fnic: fcp input requests = %llu\n",
280 stats->fcp_input_requests);
281 FNIC_MAIN_NOTE(KERN_NOTICE, host,
282 "fnic: fcp output requests = %llu\n",
283 stats->fcp_output_requests);
284 FNIC_MAIN_NOTE(KERN_NOTICE, host,
285 "fnic: fcp control requests = %llu\n",
286 stats->fcp_control_requests);
287 FNIC_MAIN_NOTE(KERN_NOTICE, host,
288 "fnic: fcp input megabytes = %llu\n",
289 stats->fcp_input_megabytes);
290 FNIC_MAIN_NOTE(KERN_NOTICE, host,
291 "fnic: fcp output megabytes = %llu\n",
292 stats->fcp_output_megabytes);
293 return;
294 }
295
296 /*
297 * fnic_reset_host_stats : clears host stats
298 * note : called when reset_statistics set under sysfs dir
299 */
300 static void fnic_reset_host_stats(struct Scsi_Host *host)
301 {
302 int ret;
303 struct fc_lport *lp = shost_priv(host);
304 struct fnic *fnic = lport_priv(lp);
305 struct fc_host_statistics *stats;
306 unsigned long flags;
307
308 /* dump current stats, before clearing them */
309 stats = fnic_get_stats(host);
310 fnic_dump_fchost_stats(host, stats);
311
312 spin_lock_irqsave(&fnic->fnic_lock, flags);
313 ret = vnic_dev_stats_clear(fnic->vdev);
314 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
315
316 if (ret) {
317 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
318 "fnic: Reset vnic stats failed"
319 " 0x%x", ret);
320 return;
321 }
322 fnic->stats_reset_time = jiffies;
323 memset(stats, 0, sizeof(*stats));
324
325 return;
326 }
327
328 void fnic_log_q_error(struct fnic *fnic)
329 {
330 unsigned int i;
331 u32 error_status;
332
333 for (i = 0; i < fnic->raw_wq_count; i++) {
334 error_status = ioread32(&fnic->wq[i].ctrl->error_status);
335 if (error_status)
336 shost_printk(KERN_ERR, fnic->lport->host,
337 "WQ[%d] error_status"
338 " %d\n", i, error_status);
339 }
340
341 for (i = 0; i < fnic->rq_count; i++) {
342 error_status = ioread32(&fnic->rq[i].ctrl->error_status);
343 if (error_status)
344 shost_printk(KERN_ERR, fnic->lport->host,
345 "RQ[%d] error_status"
346 " %d\n", i, error_status);
347 }
348
349 for (i = 0; i < fnic->wq_copy_count; i++) {
350 error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status);
351 if (error_status)
352 shost_printk(KERN_ERR, fnic->lport->host,
353 "CWQ[%d] error_status"
354 " %d\n", i, error_status);
355 }
356 }
357
358 void fnic_handle_link_event(struct fnic *fnic)
359 {
360 unsigned long flags;
361
362 spin_lock_irqsave(&fnic->fnic_lock, flags);
363 if (fnic->stop_rx_link_events) {
364 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
365 return;
366 }
367 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
368
369 queue_work(fnic_event_queue, &fnic->link_work);
370
371 }
372
373 static int fnic_notify_set(struct fnic *fnic)
374 {
375 int err;
376
377 switch (vnic_dev_get_intr_mode(fnic->vdev)) {
378 case VNIC_DEV_INTR_MODE_INTX:
379 err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY);
380 break;
381 case VNIC_DEV_INTR_MODE_MSI:
382 err = vnic_dev_notify_set(fnic->vdev, -1);
383 break;
384 case VNIC_DEV_INTR_MODE_MSIX:
385 err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY);
386 break;
387 default:
388 shost_printk(KERN_ERR, fnic->lport->host,
389 "Interrupt mode should be set up"
390 " before devcmd notify set %d\n",
391 vnic_dev_get_intr_mode(fnic->vdev));
392 err = -1;
393 break;
394 }
395
396 return err;
397 }
398
399 static void fnic_notify_timer(unsigned long data)
400 {
401 struct fnic *fnic = (struct fnic *)data;
402
403 fnic_handle_link_event(fnic);
404 mod_timer(&fnic->notify_timer,
405 round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));
406 }
407
408 static void fnic_fip_notify_timer(unsigned long data)
409 {
410 struct fnic *fnic = (struct fnic *)data;
411
412 fnic_handle_fip_timer(fnic);
413 }
414
415 static void fnic_notify_timer_start(struct fnic *fnic)
416 {
417 switch (vnic_dev_get_intr_mode(fnic->vdev)) {
418 case VNIC_DEV_INTR_MODE_MSI:
419 /*
420 * Schedule first timeout immediately. The driver is
421 * initiatialized and ready to look for link up notification
422 */
423 mod_timer(&fnic->notify_timer, jiffies);
424 break;
425 default:
426 /* Using intr for notification for INTx/MSI-X */
427 break;
428 };
429 }
430
431 static int fnic_dev_wait(struct vnic_dev *vdev,
432 int (*start)(struct vnic_dev *, int),
433 int (*finished)(struct vnic_dev *, int *),
434 int arg)
435 {
436 unsigned long time;
437 int done;
438 int err;
439 int count;
440
441 count = 0;
442
443 err = start(vdev, arg);
444 if (err)
445 return err;
446
447 /* Wait for func to complete.
448 * Sometime schedule_timeout_uninterruptible take long time
449 * to wake up so we do not retry as we are only waiting for
450 * 2 seconds in while loop. By adding count, we make sure
451 * we try atleast three times before returning -ETIMEDOUT
452 */
453 time = jiffies + (HZ * 2);
454 do {
455 err = finished(vdev, &done);
456 count++;
457 if (err)
458 return err;
459 if (done)
460 return 0;
461 schedule_timeout_uninterruptible(HZ / 10);
462 } while (time_after(time, jiffies) || (count < 3));
463
464 return -ETIMEDOUT;
465 }
466
467 static int fnic_cleanup(struct fnic *fnic)
468 {
469 unsigned int i;
470 int err;
471
472 vnic_dev_disable(fnic->vdev);
473 for (i = 0; i < fnic->intr_count; i++)
474 vnic_intr_mask(&fnic->intr[i]);
475
476 for (i = 0; i < fnic->rq_count; i++) {
477 err = vnic_rq_disable(&fnic->rq[i]);
478 if (err)
479 return err;
480 }
481 for (i = 0; i < fnic->raw_wq_count; i++) {
482 err = vnic_wq_disable(&fnic->wq[i]);
483 if (err)
484 return err;
485 }
486 for (i = 0; i < fnic->wq_copy_count; i++) {
487 err = vnic_wq_copy_disable(&fnic->wq_copy[i]);
488 if (err)
489 return err;
490 }
491
492 /* Clean up completed IOs and FCS frames */
493 fnic_wq_copy_cmpl_handler(fnic, -1);
494 fnic_wq_cmpl_handler(fnic, -1);
495 fnic_rq_cmpl_handler(fnic, -1);
496
497 /* Clean up the IOs and FCS frames that have not completed */
498 for (i = 0; i < fnic->raw_wq_count; i++)
499 vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf);
500 for (i = 0; i < fnic->rq_count; i++)
501 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
502 for (i = 0; i < fnic->wq_copy_count; i++)
503 vnic_wq_copy_clean(&fnic->wq_copy[i],
504 fnic_wq_copy_cleanup_handler);
505
506 for (i = 0; i < fnic->cq_count; i++)
507 vnic_cq_clean(&fnic->cq[i]);
508 for (i = 0; i < fnic->intr_count; i++)
509 vnic_intr_clean(&fnic->intr[i]);
510
511 mempool_destroy(fnic->io_req_pool);
512 for (i = 0; i < FNIC_SGL_NUM_CACHES; i++)
513 mempool_destroy(fnic->io_sgl_pool[i]);
514
515 return 0;
516 }
517
518 static void fnic_iounmap(struct fnic *fnic)
519 {
520 if (fnic->bar0.vaddr)
521 iounmap(fnic->bar0.vaddr);
522 }
523
524 /**
525 * fnic_get_mac() - get assigned data MAC address for FIP code.
526 * @lport: local port.
527 */
528 static u8 *fnic_get_mac(struct fc_lport *lport)
529 {
530 struct fnic *fnic = lport_priv(lport);
531
532 return fnic->data_src_addr;
533 }
534
535 static void fnic_set_vlan(struct fnic *fnic, u16 vlan_id)
536 {
537 u16 old_vlan;
538 old_vlan = vnic_dev_set_default_vlan(fnic->vdev, vlan_id);
539 }
540
541 static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
542 {
543 struct Scsi_Host *host;
544 struct fc_lport *lp;
545 struct fnic *fnic;
546 mempool_t *pool;
547 int err;
548 int i;
549 unsigned long flags;
550
551 /*
552 * Allocate SCSI Host and set up association between host,
553 * local port, and fnic
554 */
555 lp = libfc_host_alloc(&fnic_host_template, sizeof(struct fnic));
556 if (!lp) {
557 printk(KERN_ERR PFX "Unable to alloc libfc local port\n");
558 err = -ENOMEM;
559 goto err_out;
560 }
561 host = lp->host;
562 fnic = lport_priv(lp);
563 fnic->lport = lp;
564 fnic->ctlr.lp = lp;
565
566 snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME,
567 host->host_no);
568
569 host->transportt = fnic_fc_transport;
570
571 err = fnic_stats_debugfs_init(fnic);
572 if (err) {
573 shost_printk(KERN_ERR, fnic->lport->host,
574 "Failed to initialize debugfs for stats\n");
575 fnic_stats_debugfs_remove(fnic);
576 }
577
578 /* Setup PCI resources */
579 pci_set_drvdata(pdev, fnic);
580
581 fnic->pdev = pdev;
582
583 err = pci_enable_device(pdev);
584 if (err) {
585 shost_printk(KERN_ERR, fnic->lport->host,
586 "Cannot enable PCI device, aborting.\n");
587 goto err_out_free_hba;
588 }
589
590 err = pci_request_regions(pdev, DRV_NAME);
591 if (err) {
592 shost_printk(KERN_ERR, fnic->lport->host,
593 "Cannot enable PCI resources, aborting\n");
594 goto err_out_disable_device;
595 }
596
597 pci_set_master(pdev);
598
599 /* Query PCI controller on system for DMA addressing
600 * limitation for the device. Try 64-bit first, and
601 * fail to 32-bit.
602 */
603 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
604 if (err) {
605 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
606 if (err) {
607 shost_printk(KERN_ERR, fnic->lport->host,
608 "No usable DMA configuration "
609 "aborting\n");
610 goto err_out_release_regions;
611 }
612 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
613 if (err) {
614 shost_printk(KERN_ERR, fnic->lport->host,
615 "Unable to obtain 32-bit DMA "
616 "for consistent allocations, aborting.\n");
617 goto err_out_release_regions;
618 }
619 } else {
620 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
621 if (err) {
622 shost_printk(KERN_ERR, fnic->lport->host,
623 "Unable to obtain 64-bit DMA "
624 "for consistent allocations, aborting.\n");
625 goto err_out_release_regions;
626 }
627 }
628
629 /* Map vNIC resources from BAR0 */
630 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
631 shost_printk(KERN_ERR, fnic->lport->host,
632 "BAR0 not memory-map'able, aborting.\n");
633 err = -ENODEV;
634 goto err_out_release_regions;
635 }
636
637 fnic->bar0.vaddr = pci_iomap(pdev, 0, 0);
638 fnic->bar0.bus_addr = pci_resource_start(pdev, 0);
639 fnic->bar0.len = pci_resource_len(pdev, 0);
640
641 if (!fnic->bar0.vaddr) {
642 shost_printk(KERN_ERR, fnic->lport->host,
643 "Cannot memory-map BAR0 res hdr, "
644 "aborting.\n");
645 err = -ENODEV;
646 goto err_out_release_regions;
647 }
648
649 fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0);
650 if (!fnic->vdev) {
651 shost_printk(KERN_ERR, fnic->lport->host,
652 "vNIC registration failed, "
653 "aborting.\n");
654 err = -ENODEV;
655 goto err_out_iounmap;
656 }
657
658 err = fnic_dev_wait(fnic->vdev, vnic_dev_open,
659 vnic_dev_open_done, 0);
660 if (err) {
661 shost_printk(KERN_ERR, fnic->lport->host,
662 "vNIC dev open failed, aborting.\n");
663 goto err_out_vnic_unregister;
664 }
665
666 err = vnic_dev_init(fnic->vdev, 0);
667 if (err) {
668 shost_printk(KERN_ERR, fnic->lport->host,
669 "vNIC dev init failed, aborting.\n");
670 goto err_out_dev_close;
671 }
672
673 err = vnic_dev_mac_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
674 if (err) {
675 shost_printk(KERN_ERR, fnic->lport->host,
676 "vNIC get MAC addr failed \n");
677 goto err_out_dev_close;
678 }
679 /* set data_src for point-to-point mode and to keep it non-zero */
680 memcpy(fnic->data_src_addr, fnic->ctlr.ctl_src_addr, ETH_ALEN);
681
682 /* Get vNIC configuration */
683 err = fnic_get_vnic_config(fnic);
684 if (err) {
685 shost_printk(KERN_ERR, fnic->lport->host,
686 "Get vNIC configuration failed, "
687 "aborting.\n");
688 goto err_out_dev_close;
689 }
690
691 /* Configure Maximum Outstanding IO reqs*/
692 if (fnic->config.io_throttle_count != FNIC_UCSM_DFLT_THROTTLE_CNT_BLD) {
693 host->can_queue = min_t(u32, FNIC_MAX_IO_REQ,
694 max_t(u32, FNIC_MIN_IO_REQ,
695 fnic->config.io_throttle_count));
696 }
697 fnic->fnic_max_tag_id = host->can_queue;
698
699 host->max_lun = fnic->config.luns_per_tgt;
700 host->max_id = FNIC_MAX_FCP_TARGET;
701 host->max_cmd_len = FCOE_MAX_CMD_LEN;
702
703 fnic_get_res_counts(fnic);
704
705 err = fnic_set_intr_mode(fnic);
706 if (err) {
707 shost_printk(KERN_ERR, fnic->lport->host,
708 "Failed to set intr mode, "
709 "aborting.\n");
710 goto err_out_dev_close;
711 }
712
713 err = fnic_alloc_vnic_resources(fnic);
714 if (err) {
715 shost_printk(KERN_ERR, fnic->lport->host,
716 "Failed to alloc vNIC resources, "
717 "aborting.\n");
718 goto err_out_clear_intr;
719 }
720
721
722 /* initialize all fnic locks */
723 spin_lock_init(&fnic->fnic_lock);
724
725 for (i = 0; i < FNIC_WQ_MAX; i++)
726 spin_lock_init(&fnic->wq_lock[i]);
727
728 for (i = 0; i < FNIC_WQ_COPY_MAX; i++) {
729 spin_lock_init(&fnic->wq_copy_lock[i]);
730 fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK;
731 fnic->fw_ack_recd[i] = 0;
732 fnic->fw_ack_index[i] = -1;
733 }
734
735 for (i = 0; i < FNIC_IO_LOCKS; i++)
736 spin_lock_init(&fnic->io_req_lock[i]);
737
738 fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache);
739 if (!fnic->io_req_pool)
740 goto err_out_free_resources;
741
742 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
743 if (!pool)
744 goto err_out_free_ioreq_pool;
745 fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool;
746
747 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
748 if (!pool)
749 goto err_out_free_dflt_pool;
750 fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool;
751
752 /* setup vlan config, hw inserts vlan header */
753 fnic->vlan_hw_insert = 1;
754 fnic->vlan_id = 0;
755
756 /* Initialize the FIP fcoe_ctrl struct */
757 fnic->ctlr.send = fnic_eth_send;
758 fnic->ctlr.update_mac = fnic_update_mac;
759 fnic->ctlr.get_src_addr = fnic_get_mac;
760 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
761 shost_printk(KERN_INFO, fnic->lport->host,
762 "firmware supports FIP\n");
763 /* enable directed and multicast */
764 vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0);
765 vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS);
766 vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
767 fnic->set_vlan = fnic_set_vlan;
768 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO);
769 setup_timer(&fnic->fip_timer, fnic_fip_notify_timer,
770 (unsigned long)fnic);
771 spin_lock_init(&fnic->vlans_lock);
772 INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame);
773 INIT_WORK(&fnic->event_work, fnic_handle_event);
774 skb_queue_head_init(&fnic->fip_frame_queue);
775 INIT_LIST_HEAD(&fnic->evlist);
776 INIT_LIST_HEAD(&fnic->vlans);
777 } else {
778 shost_printk(KERN_INFO, fnic->lport->host,
779 "firmware uses non-FIP mode\n");
780 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP);
781 fnic->ctlr.state = FIP_ST_NON_FIP;
782 }
783 fnic->state = FNIC_IN_FC_MODE;
784
785 atomic_set(&fnic->in_flight, 0);
786 fnic->state_flags = FNIC_FLAGS_NONE;
787
788 /* Enable hardware stripping of vlan header on ingress */
789 fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1);
790
791 /* Setup notification buffer area */
792 err = fnic_notify_set(fnic);
793 if (err) {
794 shost_printk(KERN_ERR, fnic->lport->host,
795 "Failed to alloc notify buffer, aborting.\n");
796 goto err_out_free_max_pool;
797 }
798
799 /* Setup notify timer when using MSI interrupts */
800 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
801 setup_timer(&fnic->notify_timer,
802 fnic_notify_timer, (unsigned long)fnic);
803
804 /* allocate RQ buffers and post them to RQ*/
805 for (i = 0; i < fnic->rq_count; i++) {
806 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
807 if (err) {
808 shost_printk(KERN_ERR, fnic->lport->host,
809 "fnic_alloc_rq_frame can't alloc "
810 "frame\n");
811 goto err_out_free_rq_buf;
812 }
813 }
814
815 /*
816 * Initialization done with PCI system, hardware, firmware.
817 * Add host to SCSI
818 */
819 err = scsi_add_host(lp->host, &pdev->dev);
820 if (err) {
821 shost_printk(KERN_ERR, fnic->lport->host,
822 "fnic: scsi_add_host failed...exiting\n");
823 goto err_out_free_rq_buf;
824 }
825
826 /* Start local port initiatialization */
827
828 lp->link_up = 0;
829
830 lp->max_retry_count = fnic->config.flogi_retries;
831 lp->max_rport_retry_count = fnic->config.plogi_retries;
832 lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
833 FCP_SPPF_CONF_COMPL);
834 if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR)
835 lp->service_params |= FCP_SPPF_RETRY;
836
837 lp->boot_time = jiffies;
838 lp->e_d_tov = fnic->config.ed_tov;
839 lp->r_a_tov = fnic->config.ra_tov;
840 lp->link_supported_speeds = FC_PORTSPEED_10GBIT;
841 fc_set_wwnn(lp, fnic->config.node_wwn);
842 fc_set_wwpn(lp, fnic->config.port_wwn);
843
844 fcoe_libfc_config(lp, &fnic->ctlr, &fnic_transport_template, 0);
845
846 if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START,
847 FCPIO_HOST_EXCH_RANGE_END, NULL)) {
848 err = -ENOMEM;
849 goto err_out_remove_scsi_host;
850 }
851
852 fc_lport_init_stats(lp);
853 fnic->stats_reset_time = jiffies;
854
855 fc_lport_config(lp);
856
857 if (fc_set_mfs(lp, fnic->config.maxdatafieldsize +
858 sizeof(struct fc_frame_header))) {
859 err = -EINVAL;
860 goto err_out_free_exch_mgr;
861 }
862 fc_host_maxframe_size(lp->host) = lp->mfs;
863 fc_host_dev_loss_tmo(lp->host) = fnic->config.port_down_timeout / 1000;
864
865 sprintf(fc_host_symbolic_name(lp->host),
866 DRV_NAME " v" DRV_VERSION " over %s", fnic->name);
867
868 spin_lock_irqsave(&fnic_list_lock, flags);
869 list_add_tail(&fnic->list, &fnic_list);
870 spin_unlock_irqrestore(&fnic_list_lock, flags);
871
872 INIT_WORK(&fnic->link_work, fnic_handle_link);
873 INIT_WORK(&fnic->frame_work, fnic_handle_frame);
874 skb_queue_head_init(&fnic->frame_queue);
875 skb_queue_head_init(&fnic->tx_queue);
876
877 /* Enable all queues */
878 for (i = 0; i < fnic->raw_wq_count; i++)
879 vnic_wq_enable(&fnic->wq[i]);
880 for (i = 0; i < fnic->rq_count; i++)
881 vnic_rq_enable(&fnic->rq[i]);
882 for (i = 0; i < fnic->wq_copy_count; i++)
883 vnic_wq_copy_enable(&fnic->wq_copy[i]);
884
885 fc_fabric_login(lp);
886
887 vnic_dev_enable(fnic->vdev);
888
889 err = fnic_request_intr(fnic);
890 if (err) {
891 shost_printk(KERN_ERR, fnic->lport->host,
892 "Unable to request irq.\n");
893 goto err_out_free_exch_mgr;
894 }
895
896 for (i = 0; i < fnic->intr_count; i++)
897 vnic_intr_unmask(&fnic->intr[i]);
898
899 fnic_notify_timer_start(fnic);
900
901 return 0;
902
903 err_out_free_exch_mgr:
904 fc_exch_mgr_free(lp);
905 err_out_remove_scsi_host:
906 fc_remove_host(lp->host);
907 scsi_remove_host(lp->host);
908 err_out_free_rq_buf:
909 for (i = 0; i < fnic->rq_count; i++)
910 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
911 vnic_dev_notify_unset(fnic->vdev);
912 err_out_free_max_pool:
913 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]);
914 err_out_free_dflt_pool:
915 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]);
916 err_out_free_ioreq_pool:
917 mempool_destroy(fnic->io_req_pool);
918 err_out_free_resources:
919 fnic_free_vnic_resources(fnic);
920 err_out_clear_intr:
921 fnic_clear_intr_mode(fnic);
922 err_out_dev_close:
923 vnic_dev_close(fnic->vdev);
924 err_out_vnic_unregister:
925 vnic_dev_unregister(fnic->vdev);
926 err_out_iounmap:
927 fnic_iounmap(fnic);
928 err_out_release_regions:
929 pci_release_regions(pdev);
930 err_out_disable_device:
931 pci_disable_device(pdev);
932 err_out_free_hba:
933 fnic_stats_debugfs_remove(fnic);
934 scsi_host_put(lp->host);
935 err_out:
936 return err;
937 }
938
939 static void fnic_remove(struct pci_dev *pdev)
940 {
941 struct fnic *fnic = pci_get_drvdata(pdev);
942 struct fc_lport *lp = fnic->lport;
943 unsigned long flags;
944
945 /*
946 * Mark state so that the workqueue thread stops forwarding
947 * received frames and link events to the local port. ISR and
948 * other threads that can queue work items will also stop
949 * creating work items on the fnic workqueue
950 */
951 spin_lock_irqsave(&fnic->fnic_lock, flags);
952 fnic->stop_rx_link_events = 1;
953 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
954
955 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
956 del_timer_sync(&fnic->notify_timer);
957
958 /*
959 * Flush the fnic event queue. After this call, there should
960 * be no event queued for this fnic device in the workqueue
961 */
962 flush_workqueue(fnic_event_queue);
963 skb_queue_purge(&fnic->frame_queue);
964 skb_queue_purge(&fnic->tx_queue);
965
966 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
967 del_timer_sync(&fnic->fip_timer);
968 skb_queue_purge(&fnic->fip_frame_queue);
969 fnic_fcoe_reset_vlans(fnic);
970 fnic_fcoe_evlist_free(fnic);
971 }
972
973 /*
974 * Log off the fabric. This stops all remote ports, dns port,
975 * logs off the fabric. This flushes all rport, disc, lport work
976 * before returning
977 */
978 fc_fabric_logoff(fnic->lport);
979
980 spin_lock_irqsave(&fnic->fnic_lock, flags);
981 fnic->in_remove = 1;
982 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
983
984 fcoe_ctlr_destroy(&fnic->ctlr);
985 fc_lport_destroy(lp);
986 fnic_stats_debugfs_remove(fnic);
987
988 /*
989 * This stops the fnic device, masks all interrupts. Completed
990 * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are
991 * cleaned up
992 */
993 fnic_cleanup(fnic);
994
995 BUG_ON(!skb_queue_empty(&fnic->frame_queue));
996 BUG_ON(!skb_queue_empty(&fnic->tx_queue));
997
998 spin_lock_irqsave(&fnic_list_lock, flags);
999 list_del(&fnic->list);
1000 spin_unlock_irqrestore(&fnic_list_lock, flags);
1001
1002 fc_remove_host(fnic->lport->host);
1003 scsi_remove_host(fnic->lport->host);
1004 fc_exch_mgr_free(fnic->lport);
1005 vnic_dev_notify_unset(fnic->vdev);
1006 fnic_free_intr(fnic);
1007 fnic_free_vnic_resources(fnic);
1008 fnic_clear_intr_mode(fnic);
1009 vnic_dev_close(fnic->vdev);
1010 vnic_dev_unregister(fnic->vdev);
1011 fnic_iounmap(fnic);
1012 pci_release_regions(pdev);
1013 pci_disable_device(pdev);
1014 scsi_host_put(lp->host);
1015 }
1016
1017 static struct pci_driver fnic_driver = {
1018 .name = DRV_NAME,
1019 .id_table = fnic_id_table,
1020 .probe = fnic_probe,
1021 .remove = fnic_remove,
1022 };
1023
1024 static int __init fnic_init_module(void)
1025 {
1026 size_t len;
1027 int err = 0;
1028
1029 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
1030
1031 /* Create debugfs entries for fnic */
1032 err = fnic_debugfs_init();
1033 if (err < 0) {
1034 printk(KERN_ERR PFX "Failed to create fnic directory "
1035 "for tracing and stats logging\n");
1036 fnic_debugfs_terminate();
1037 }
1038
1039 /* Allocate memory for trace buffer */
1040 err = fnic_trace_buf_init();
1041 if (err < 0) {
1042 printk(KERN_ERR PFX
1043 "Trace buffer initialization Failed. "
1044 "Fnic Tracing utility is disabled\n");
1045 fnic_trace_free();
1046 }
1047
1048 /* Allocate memory for fc trace buffer */
1049 err = fnic_fc_trace_init();
1050 if (err < 0) {
1051 printk(KERN_ERR PFX "FC trace buffer initialization Failed "
1052 "FC frame tracing utility is disabled\n");
1053 fnic_fc_trace_free();
1054 }
1055
1056 /* Create a cache for allocation of default size sgls */
1057 len = sizeof(struct fnic_dflt_sgl_list);
1058 fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create
1059 ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
1060 SLAB_HWCACHE_ALIGN,
1061 NULL);
1062 if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) {
1063 printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n");
1064 err = -ENOMEM;
1065 goto err_create_fnic_sgl_slab_dflt;
1066 }
1067
1068 /* Create a cache for allocation of max size sgls*/
1069 len = sizeof(struct fnic_sgl_list);
1070 fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create
1071 ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
1072 SLAB_HWCACHE_ALIGN,
1073 NULL);
1074 if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) {
1075 printk(KERN_ERR PFX "failed to create fnic max sgl slab\n");
1076 err = -ENOMEM;
1077 goto err_create_fnic_sgl_slab_max;
1078 }
1079
1080 /* Create a cache of io_req structs for use via mempool */
1081 fnic_io_req_cache = kmem_cache_create("fnic_io_req",
1082 sizeof(struct fnic_io_req),
1083 0, SLAB_HWCACHE_ALIGN, NULL);
1084 if (!fnic_io_req_cache) {
1085 printk(KERN_ERR PFX "failed to create fnic io_req slab\n");
1086 err = -ENOMEM;
1087 goto err_create_fnic_ioreq_slab;
1088 }
1089
1090 fnic_event_queue = create_singlethread_workqueue("fnic_event_wq");
1091 if (!fnic_event_queue) {
1092 printk(KERN_ERR PFX "fnic work queue create failed\n");
1093 err = -ENOMEM;
1094 goto err_create_fnic_workq;
1095 }
1096
1097 spin_lock_init(&fnic_list_lock);
1098 INIT_LIST_HEAD(&fnic_list);
1099
1100 fnic_fip_queue = create_singlethread_workqueue("fnic_fip_q");
1101 if (!fnic_fip_queue) {
1102 printk(KERN_ERR PFX "fnic FIP work queue create failed\n");
1103 err = -ENOMEM;
1104 goto err_create_fip_workq;
1105 }
1106
1107 fnic_fc_transport = fc_attach_transport(&fnic_fc_functions);
1108 if (!fnic_fc_transport) {
1109 printk(KERN_ERR PFX "fc_attach_transport error\n");
1110 err = -ENOMEM;
1111 goto err_fc_transport;
1112 }
1113
1114 /* register the driver with PCI system */
1115 err = pci_register_driver(&fnic_driver);
1116 if (err < 0) {
1117 printk(KERN_ERR PFX "pci register error\n");
1118 goto err_pci_register;
1119 }
1120 return err;
1121
1122 err_pci_register:
1123 fc_release_transport(fnic_fc_transport);
1124 err_fc_transport:
1125 destroy_workqueue(fnic_fip_queue);
1126 err_create_fip_workq:
1127 destroy_workqueue(fnic_event_queue);
1128 err_create_fnic_workq:
1129 kmem_cache_destroy(fnic_io_req_cache);
1130 err_create_fnic_ioreq_slab:
1131 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
1132 err_create_fnic_sgl_slab_max:
1133 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
1134 err_create_fnic_sgl_slab_dflt:
1135 fnic_trace_free();
1136 fnic_fc_trace_free();
1137 fnic_debugfs_terminate();
1138 return err;
1139 }
1140
1141 static void __exit fnic_cleanup_module(void)
1142 {
1143 pci_unregister_driver(&fnic_driver);
1144 destroy_workqueue(fnic_event_queue);
1145 if (fnic_fip_queue) {
1146 flush_workqueue(fnic_fip_queue);
1147 destroy_workqueue(fnic_fip_queue);
1148 }
1149 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
1150 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
1151 kmem_cache_destroy(fnic_io_req_cache);
1152 fc_release_transport(fnic_fc_transport);
1153 fnic_trace_free();
1154 fnic_fc_trace_free();
1155 fnic_debugfs_terminate();
1156 }
1157
1158 module_init(fnic_init_module);
1159 module_exit(fnic_cleanup_module);
1160
Linux with added FPC-III support