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[mirror_ubuntu-bionic-kernel.git] / drivers / scsi / fnic / fnic_main.c
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_timed_out = fc_eh_timed_out,
110 .eh_abort_handler = fnic_abort_cmd,
111 .eh_device_reset_handler = fnic_device_reset,
112 .eh_host_reset_handler = fnic_host_reset,
113 .slave_alloc = fnic_slave_alloc,
114 .change_queue_depth = scsi_change_queue_depth,
115 .this_id = -1,
116 .cmd_per_lun = 3,
117 .can_queue = FNIC_DFLT_IO_REQ,
118 .use_clustering = ENABLE_CLUSTERING,
119 .sg_tablesize = FNIC_MAX_SG_DESC_CNT,
120 .max_sectors = 0xffff,
121 .shost_attrs = fnic_attrs,
122 .track_queue_depth = 1,
123 };
124
125 static void
126 fnic_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
127 {
128 if (timeout)
129 rport->dev_loss_tmo = timeout;
130 else
131 rport->dev_loss_tmo = 1;
132 }
133
134 static void fnic_get_host_speed(struct Scsi_Host *shost);
135 static struct scsi_transport_template *fnic_fc_transport;
136 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *);
137 static void fnic_reset_host_stats(struct Scsi_Host *);
138
139 static struct fc_function_template fnic_fc_functions = {
140
141 .show_host_node_name = 1,
142 .show_host_port_name = 1,
143 .show_host_supported_classes = 1,
144 .show_host_supported_fc4s = 1,
145 .show_host_active_fc4s = 1,
146 .show_host_maxframe_size = 1,
147 .show_host_port_id = 1,
148 .show_host_supported_speeds = 1,
149 .get_host_speed = fnic_get_host_speed,
150 .show_host_speed = 1,
151 .show_host_port_type = 1,
152 .get_host_port_state = fc_get_host_port_state,
153 .show_host_port_state = 1,
154 .show_host_symbolic_name = 1,
155 .show_rport_maxframe_size = 1,
156 .show_rport_supported_classes = 1,
157 .show_host_fabric_name = 1,
158 .show_starget_node_name = 1,
159 .show_starget_port_name = 1,
160 .show_starget_port_id = 1,
161 .show_rport_dev_loss_tmo = 1,
162 .set_rport_dev_loss_tmo = fnic_set_rport_dev_loss_tmo,
163 .issue_fc_host_lip = fnic_reset,
164 .get_fc_host_stats = fnic_get_stats,
165 .reset_fc_host_stats = fnic_reset_host_stats,
166 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
167 .terminate_rport_io = fnic_terminate_rport_io,
168 .bsg_request = fc_lport_bsg_request,
169 };
170
171 static void fnic_get_host_speed(struct Scsi_Host *shost)
172 {
173 struct fc_lport *lp = shost_priv(shost);
174 struct fnic *fnic = lport_priv(lp);
175 u32 port_speed = vnic_dev_port_speed(fnic->vdev);
176
177 /* Add in other values as they get defined in fw */
178 switch (port_speed) {
179 case DCEM_PORTSPEED_10G:
180 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
181 break;
182 case DCEM_PORTSPEED_25G:
183 fc_host_speed(shost) = FC_PORTSPEED_25GBIT;
184 break;
185 case DCEM_PORTSPEED_40G:
186 case DCEM_PORTSPEED_4x10G:
187 fc_host_speed(shost) = FC_PORTSPEED_40GBIT;
188 break;
189 case DCEM_PORTSPEED_100G:
190 fc_host_speed(shost) = FC_PORTSPEED_100GBIT;
191 break;
192 default:
193 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
194 break;
195 }
196 }
197
198 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host)
199 {
200 int ret;
201 struct fc_lport *lp = shost_priv(host);
202 struct fnic *fnic = lport_priv(lp);
203 struct fc_host_statistics *stats = &lp->host_stats;
204 struct vnic_stats *vs;
205 unsigned long flags;
206
207 if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT))
208 return stats;
209 fnic->stats_time = jiffies;
210
211 spin_lock_irqsave(&fnic->fnic_lock, flags);
212 ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
213 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
214
215 if (ret) {
216 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
217 "fnic: Get vnic stats failed"
218 " 0x%x", ret);
219 return stats;
220 }
221 vs = fnic->stats;
222 stats->tx_frames = vs->tx.tx_unicast_frames_ok;
223 stats->tx_words = vs->tx.tx_unicast_bytes_ok / 4;
224 stats->rx_frames = vs->rx.rx_unicast_frames_ok;
225 stats->rx_words = vs->rx.rx_unicast_bytes_ok / 4;
226 stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors;
227 stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop;
228 stats->invalid_crc_count = vs->rx.rx_crc_errors;
229 stats->seconds_since_last_reset =
230 (jiffies - fnic->stats_reset_time) / HZ;
231 stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000);
232 stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000);
233
234 return stats;
235 }
236
237 /*
238 * fnic_dump_fchost_stats
239 * note : dumps fc_statistics into system logs
240 */
241 void fnic_dump_fchost_stats(struct Scsi_Host *host,
242 struct fc_host_statistics *stats)
243 {
244 FNIC_MAIN_NOTE(KERN_NOTICE, host,
245 "fnic: seconds since last reset = %llu\n",
246 stats->seconds_since_last_reset);
247 FNIC_MAIN_NOTE(KERN_NOTICE, host,
248 "fnic: tx frames = %llu\n",
249 stats->tx_frames);
250 FNIC_MAIN_NOTE(KERN_NOTICE, host,
251 "fnic: tx words = %llu\n",
252 stats->tx_words);
253 FNIC_MAIN_NOTE(KERN_NOTICE, host,
254 "fnic: rx frames = %llu\n",
255 stats->rx_frames);
256 FNIC_MAIN_NOTE(KERN_NOTICE, host,
257 "fnic: rx words = %llu\n",
258 stats->rx_words);
259 FNIC_MAIN_NOTE(KERN_NOTICE, host,
260 "fnic: lip count = %llu\n",
261 stats->lip_count);
262 FNIC_MAIN_NOTE(KERN_NOTICE, host,
263 "fnic: nos count = %llu\n",
264 stats->nos_count);
265 FNIC_MAIN_NOTE(KERN_NOTICE, host,
266 "fnic: error frames = %llu\n",
267 stats->error_frames);
268 FNIC_MAIN_NOTE(KERN_NOTICE, host,
269 "fnic: dumped frames = %llu\n",
270 stats->dumped_frames);
271 FNIC_MAIN_NOTE(KERN_NOTICE, host,
272 "fnic: link failure count = %llu\n",
273 stats->link_failure_count);
274 FNIC_MAIN_NOTE(KERN_NOTICE, host,
275 "fnic: loss of sync count = %llu\n",
276 stats->loss_of_sync_count);
277 FNIC_MAIN_NOTE(KERN_NOTICE, host,
278 "fnic: loss of signal count = %llu\n",
279 stats->loss_of_signal_count);
280 FNIC_MAIN_NOTE(KERN_NOTICE, host,
281 "fnic: prim seq protocol err count = %llu\n",
282 stats->prim_seq_protocol_err_count);
283 FNIC_MAIN_NOTE(KERN_NOTICE, host,
284 "fnic: invalid tx word count= %llu\n",
285 stats->invalid_tx_word_count);
286 FNIC_MAIN_NOTE(KERN_NOTICE, host,
287 "fnic: invalid crc count = %llu\n",
288 stats->invalid_crc_count);
289 FNIC_MAIN_NOTE(KERN_NOTICE, host,
290 "fnic: fcp input requests = %llu\n",
291 stats->fcp_input_requests);
292 FNIC_MAIN_NOTE(KERN_NOTICE, host,
293 "fnic: fcp output requests = %llu\n",
294 stats->fcp_output_requests);
295 FNIC_MAIN_NOTE(KERN_NOTICE, host,
296 "fnic: fcp control requests = %llu\n",
297 stats->fcp_control_requests);
298 FNIC_MAIN_NOTE(KERN_NOTICE, host,
299 "fnic: fcp input megabytes = %llu\n",
300 stats->fcp_input_megabytes);
301 FNIC_MAIN_NOTE(KERN_NOTICE, host,
302 "fnic: fcp output megabytes = %llu\n",
303 stats->fcp_output_megabytes);
304 return;
305 }
306
307 /*
308 * fnic_reset_host_stats : clears host stats
309 * note : called when reset_statistics set under sysfs dir
310 */
311 static void fnic_reset_host_stats(struct Scsi_Host *host)
312 {
313 int ret;
314 struct fc_lport *lp = shost_priv(host);
315 struct fnic *fnic = lport_priv(lp);
316 struct fc_host_statistics *stats;
317 unsigned long flags;
318
319 /* dump current stats, before clearing them */
320 stats = fnic_get_stats(host);
321 fnic_dump_fchost_stats(host, stats);
322
323 spin_lock_irqsave(&fnic->fnic_lock, flags);
324 ret = vnic_dev_stats_clear(fnic->vdev);
325 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
326
327 if (ret) {
328 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
329 "fnic: Reset vnic stats failed"
330 " 0x%x", ret);
331 return;
332 }
333 fnic->stats_reset_time = jiffies;
334 memset(stats, 0, sizeof(*stats));
335
336 return;
337 }
338
339 void fnic_log_q_error(struct fnic *fnic)
340 {
341 unsigned int i;
342 u32 error_status;
343
344 for (i = 0; i < fnic->raw_wq_count; i++) {
345 error_status = ioread32(&fnic->wq[i].ctrl->error_status);
346 if (error_status)
347 shost_printk(KERN_ERR, fnic->lport->host,
348 "WQ[%d] error_status"
349 " %d\n", i, error_status);
350 }
351
352 for (i = 0; i < fnic->rq_count; i++) {
353 error_status = ioread32(&fnic->rq[i].ctrl->error_status);
354 if (error_status)
355 shost_printk(KERN_ERR, fnic->lport->host,
356 "RQ[%d] error_status"
357 " %d\n", i, error_status);
358 }
359
360 for (i = 0; i < fnic->wq_copy_count; i++) {
361 error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status);
362 if (error_status)
363 shost_printk(KERN_ERR, fnic->lport->host,
364 "CWQ[%d] error_status"
365 " %d\n", i, error_status);
366 }
367 }
368
369 void fnic_handle_link_event(struct fnic *fnic)
370 {
371 unsigned long flags;
372
373 spin_lock_irqsave(&fnic->fnic_lock, flags);
374 if (fnic->stop_rx_link_events) {
375 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
376 return;
377 }
378 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
379
380 queue_work(fnic_event_queue, &fnic->link_work);
381
382 }
383
384 static int fnic_notify_set(struct fnic *fnic)
385 {
386 int err;
387
388 switch (vnic_dev_get_intr_mode(fnic->vdev)) {
389 case VNIC_DEV_INTR_MODE_INTX:
390 err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY);
391 break;
392 case VNIC_DEV_INTR_MODE_MSI:
393 err = vnic_dev_notify_set(fnic->vdev, -1);
394 break;
395 case VNIC_DEV_INTR_MODE_MSIX:
396 err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY);
397 break;
398 default:
399 shost_printk(KERN_ERR, fnic->lport->host,
400 "Interrupt mode should be set up"
401 " before devcmd notify set %d\n",
402 vnic_dev_get_intr_mode(fnic->vdev));
403 err = -1;
404 break;
405 }
406
407 return err;
408 }
409
410 static void fnic_notify_timer(unsigned long data)
411 {
412 struct fnic *fnic = (struct fnic *)data;
413
414 fnic_handle_link_event(fnic);
415 mod_timer(&fnic->notify_timer,
416 round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));
417 }
418
419 static void fnic_fip_notify_timer(unsigned long data)
420 {
421 struct fnic *fnic = (struct fnic *)data;
422
423 fnic_handle_fip_timer(fnic);
424 }
425
426 static void fnic_notify_timer_start(struct fnic *fnic)
427 {
428 switch (vnic_dev_get_intr_mode(fnic->vdev)) {
429 case VNIC_DEV_INTR_MODE_MSI:
430 /*
431 * Schedule first timeout immediately. The driver is
432 * initiatialized and ready to look for link up notification
433 */
434 mod_timer(&fnic->notify_timer, jiffies);
435 break;
436 default:
437 /* Using intr for notification for INTx/MSI-X */
438 break;
439 };
440 }
441
442 static int fnic_dev_wait(struct vnic_dev *vdev,
443 int (*start)(struct vnic_dev *, int),
444 int (*finished)(struct vnic_dev *, int *),
445 int arg)
446 {
447 unsigned long time;
448 int done;
449 int err;
450 int count;
451
452 count = 0;
453
454 err = start(vdev, arg);
455 if (err)
456 return err;
457
458 /* Wait for func to complete.
459 * Sometime schedule_timeout_uninterruptible take long time
460 * to wake up so we do not retry as we are only waiting for
461 * 2 seconds in while loop. By adding count, we make sure
462 * we try atleast three times before returning -ETIMEDOUT
463 */
464 time = jiffies + (HZ * 2);
465 do {
466 err = finished(vdev, &done);
467 count++;
468 if (err)
469 return err;
470 if (done)
471 return 0;
472 schedule_timeout_uninterruptible(HZ / 10);
473 } while (time_after(time, jiffies) || (count < 3));
474
475 return -ETIMEDOUT;
476 }
477
478 static int fnic_cleanup(struct fnic *fnic)
479 {
480 unsigned int i;
481 int err;
482
483 vnic_dev_disable(fnic->vdev);
484 for (i = 0; i < fnic->intr_count; i++)
485 vnic_intr_mask(&fnic->intr[i]);
486
487 for (i = 0; i < fnic->rq_count; i++) {
488 err = vnic_rq_disable(&fnic->rq[i]);
489 if (err)
490 return err;
491 }
492 for (i = 0; i < fnic->raw_wq_count; i++) {
493 err = vnic_wq_disable(&fnic->wq[i]);
494 if (err)
495 return err;
496 }
497 for (i = 0; i < fnic->wq_copy_count; i++) {
498 err = vnic_wq_copy_disable(&fnic->wq_copy[i]);
499 if (err)
500 return err;
501 }
502
503 /* Clean up completed IOs and FCS frames */
504 fnic_wq_copy_cmpl_handler(fnic, -1);
505 fnic_wq_cmpl_handler(fnic, -1);
506 fnic_rq_cmpl_handler(fnic, -1);
507
508 /* Clean up the IOs and FCS frames that have not completed */
509 for (i = 0; i < fnic->raw_wq_count; i++)
510 vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf);
511 for (i = 0; i < fnic->rq_count; i++)
512 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
513 for (i = 0; i < fnic->wq_copy_count; i++)
514 vnic_wq_copy_clean(&fnic->wq_copy[i],
515 fnic_wq_copy_cleanup_handler);
516
517 for (i = 0; i < fnic->cq_count; i++)
518 vnic_cq_clean(&fnic->cq[i]);
519 for (i = 0; i < fnic->intr_count; i++)
520 vnic_intr_clean(&fnic->intr[i]);
521
522 mempool_destroy(fnic->io_req_pool);
523 for (i = 0; i < FNIC_SGL_NUM_CACHES; i++)
524 mempool_destroy(fnic->io_sgl_pool[i]);
525
526 return 0;
527 }
528
529 static void fnic_iounmap(struct fnic *fnic)
530 {
531 if (fnic->bar0.vaddr)
532 iounmap(fnic->bar0.vaddr);
533 }
534
535 /**
536 * fnic_get_mac() - get assigned data MAC address for FIP code.
537 * @lport: local port.
538 */
539 static u8 *fnic_get_mac(struct fc_lport *lport)
540 {
541 struct fnic *fnic = lport_priv(lport);
542
543 return fnic->data_src_addr;
544 }
545
546 static void fnic_set_vlan(struct fnic *fnic, u16 vlan_id)
547 {
548 u16 old_vlan;
549 old_vlan = vnic_dev_set_default_vlan(fnic->vdev, vlan_id);
550 }
551
552 static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
553 {
554 struct Scsi_Host *host;
555 struct fc_lport *lp;
556 struct fnic *fnic;
557 mempool_t *pool;
558 int err;
559 int i;
560 unsigned long flags;
561
562 /*
563 * Allocate SCSI Host and set up association between host,
564 * local port, and fnic
565 */
566 lp = libfc_host_alloc(&fnic_host_template, sizeof(struct fnic));
567 if (!lp) {
568 printk(KERN_ERR PFX "Unable to alloc libfc local port\n");
569 err = -ENOMEM;
570 goto err_out;
571 }
572 host = lp->host;
573 fnic = lport_priv(lp);
574 fnic->lport = lp;
575 fnic->ctlr.lp = lp;
576
577 snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME,
578 host->host_no);
579
580 host->transportt = fnic_fc_transport;
581
582 err = fnic_stats_debugfs_init(fnic);
583 if (err) {
584 shost_printk(KERN_ERR, fnic->lport->host,
585 "Failed to initialize debugfs for stats\n");
586 fnic_stats_debugfs_remove(fnic);
587 }
588
589 /* Setup PCI resources */
590 pci_set_drvdata(pdev, fnic);
591
592 fnic->pdev = pdev;
593
594 err = pci_enable_device(pdev);
595 if (err) {
596 shost_printk(KERN_ERR, fnic->lport->host,
597 "Cannot enable PCI device, aborting.\n");
598 goto err_out_free_hba;
599 }
600
601 err = pci_request_regions(pdev, DRV_NAME);
602 if (err) {
603 shost_printk(KERN_ERR, fnic->lport->host,
604 "Cannot enable PCI resources, aborting\n");
605 goto err_out_disable_device;
606 }
607
608 pci_set_master(pdev);
609
610 /* Query PCI controller on system for DMA addressing
611 * limitation for the device. Try 64-bit first, and
612 * fail to 32-bit.
613 */
614 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
615 if (err) {
616 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
617 if (err) {
618 shost_printk(KERN_ERR, fnic->lport->host,
619 "No usable DMA configuration "
620 "aborting\n");
621 goto err_out_release_regions;
622 }
623 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
624 if (err) {
625 shost_printk(KERN_ERR, fnic->lport->host,
626 "Unable to obtain 32-bit DMA "
627 "for consistent allocations, aborting.\n");
628 goto err_out_release_regions;
629 }
630 } else {
631 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
632 if (err) {
633 shost_printk(KERN_ERR, fnic->lport->host,
634 "Unable to obtain 64-bit DMA "
635 "for consistent allocations, aborting.\n");
636 goto err_out_release_regions;
637 }
638 }
639
640 /* Map vNIC resources from BAR0 */
641 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
642 shost_printk(KERN_ERR, fnic->lport->host,
643 "BAR0 not memory-map'able, aborting.\n");
644 err = -ENODEV;
645 goto err_out_release_regions;
646 }
647
648 fnic->bar0.vaddr = pci_iomap(pdev, 0, 0);
649 fnic->bar0.bus_addr = pci_resource_start(pdev, 0);
650 fnic->bar0.len = pci_resource_len(pdev, 0);
651
652 if (!fnic->bar0.vaddr) {
653 shost_printk(KERN_ERR, fnic->lport->host,
654 "Cannot memory-map BAR0 res hdr, "
655 "aborting.\n");
656 err = -ENODEV;
657 goto err_out_release_regions;
658 }
659
660 fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0);
661 if (!fnic->vdev) {
662 shost_printk(KERN_ERR, fnic->lport->host,
663 "vNIC registration failed, "
664 "aborting.\n");
665 err = -ENODEV;
666 goto err_out_iounmap;
667 }
668
669 err = fnic_dev_wait(fnic->vdev, vnic_dev_open,
670 vnic_dev_open_done, 0);
671 if (err) {
672 shost_printk(KERN_ERR, fnic->lport->host,
673 "vNIC dev open failed, aborting.\n");
674 goto err_out_vnic_unregister;
675 }
676
677 err = vnic_dev_init(fnic->vdev, 0);
678 if (err) {
679 shost_printk(KERN_ERR, fnic->lport->host,
680 "vNIC dev init failed, aborting.\n");
681 goto err_out_dev_close;
682 }
683
684 err = vnic_dev_mac_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
685 if (err) {
686 shost_printk(KERN_ERR, fnic->lport->host,
687 "vNIC get MAC addr failed \n");
688 goto err_out_dev_close;
689 }
690 /* set data_src for point-to-point mode and to keep it non-zero */
691 memcpy(fnic->data_src_addr, fnic->ctlr.ctl_src_addr, ETH_ALEN);
692
693 /* Get vNIC configuration */
694 err = fnic_get_vnic_config(fnic);
695 if (err) {
696 shost_printk(KERN_ERR, fnic->lport->host,
697 "Get vNIC configuration failed, "
698 "aborting.\n");
699 goto err_out_dev_close;
700 }
701
702 /* Configure Maximum Outstanding IO reqs*/
703 if (fnic->config.io_throttle_count != FNIC_UCSM_DFLT_THROTTLE_CNT_BLD) {
704 host->can_queue = min_t(u32, FNIC_MAX_IO_REQ,
705 max_t(u32, FNIC_MIN_IO_REQ,
706 fnic->config.io_throttle_count));
707 }
708 fnic->fnic_max_tag_id = host->can_queue;
709
710 host->max_lun = fnic->config.luns_per_tgt;
711 host->max_id = FNIC_MAX_FCP_TARGET;
712 host->max_cmd_len = FCOE_MAX_CMD_LEN;
713
714 fnic_get_res_counts(fnic);
715
716 err = fnic_set_intr_mode(fnic);
717 if (err) {
718 shost_printk(KERN_ERR, fnic->lport->host,
719 "Failed to set intr mode, "
720 "aborting.\n");
721 goto err_out_dev_close;
722 }
723
724 err = fnic_alloc_vnic_resources(fnic);
725 if (err) {
726 shost_printk(KERN_ERR, fnic->lport->host,
727 "Failed to alloc vNIC resources, "
728 "aborting.\n");
729 goto err_out_clear_intr;
730 }
731
732
733 /* initialize all fnic locks */
734 spin_lock_init(&fnic->fnic_lock);
735
736 for (i = 0; i < FNIC_WQ_MAX; i++)
737 spin_lock_init(&fnic->wq_lock[i]);
738
739 for (i = 0; i < FNIC_WQ_COPY_MAX; i++) {
740 spin_lock_init(&fnic->wq_copy_lock[i]);
741 fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK;
742 fnic->fw_ack_recd[i] = 0;
743 fnic->fw_ack_index[i] = -1;
744 }
745
746 for (i = 0; i < FNIC_IO_LOCKS; i++)
747 spin_lock_init(&fnic->io_req_lock[i]);
748
749 fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache);
750 if (!fnic->io_req_pool)
751 goto err_out_free_resources;
752
753 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
754 if (!pool)
755 goto err_out_free_ioreq_pool;
756 fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool;
757
758 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
759 if (!pool)
760 goto err_out_free_dflt_pool;
761 fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool;
762
763 /* setup vlan config, hw inserts vlan header */
764 fnic->vlan_hw_insert = 1;
765 fnic->vlan_id = 0;
766
767 /* Initialize the FIP fcoe_ctrl struct */
768 fnic->ctlr.send = fnic_eth_send;
769 fnic->ctlr.update_mac = fnic_update_mac;
770 fnic->ctlr.get_src_addr = fnic_get_mac;
771 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
772 shost_printk(KERN_INFO, fnic->lport->host,
773 "firmware supports FIP\n");
774 /* enable directed and multicast */
775 vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0);
776 vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS);
777 vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
778 fnic->set_vlan = fnic_set_vlan;
779 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO);
780 setup_timer(&fnic->fip_timer, fnic_fip_notify_timer,
781 (unsigned long)fnic);
782 spin_lock_init(&fnic->vlans_lock);
783 INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame);
784 INIT_WORK(&fnic->event_work, fnic_handle_event);
785 skb_queue_head_init(&fnic->fip_frame_queue);
786 INIT_LIST_HEAD(&fnic->evlist);
787 INIT_LIST_HEAD(&fnic->vlans);
788 } else {
789 shost_printk(KERN_INFO, fnic->lport->host,
790 "firmware uses non-FIP mode\n");
791 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP);
792 fnic->ctlr.state = FIP_ST_NON_FIP;
793 }
794 fnic->state = FNIC_IN_FC_MODE;
795
796 atomic_set(&fnic->in_flight, 0);
797 fnic->state_flags = FNIC_FLAGS_NONE;
798
799 /* Enable hardware stripping of vlan header on ingress */
800 fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1);
801
802 /* Setup notification buffer area */
803 err = fnic_notify_set(fnic);
804 if (err) {
805 shost_printk(KERN_ERR, fnic->lport->host,
806 "Failed to alloc notify buffer, aborting.\n");
807 goto err_out_free_max_pool;
808 }
809
810 /* Setup notify timer when using MSI interrupts */
811 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
812 setup_timer(&fnic->notify_timer,
813 fnic_notify_timer, (unsigned long)fnic);
814
815 /* allocate RQ buffers and post them to RQ*/
816 for (i = 0; i < fnic->rq_count; i++) {
817 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
818 if (err) {
819 shost_printk(KERN_ERR, fnic->lport->host,
820 "fnic_alloc_rq_frame can't alloc "
821 "frame\n");
822 goto err_out_free_rq_buf;
823 }
824 }
825
826 /*
827 * Initialization done with PCI system, hardware, firmware.
828 * Add host to SCSI
829 */
830 err = scsi_add_host(lp->host, &pdev->dev);
831 if (err) {
832 shost_printk(KERN_ERR, fnic->lport->host,
833 "fnic: scsi_add_host failed...exiting\n");
834 goto err_out_free_rq_buf;
835 }
836
837 /* Start local port initiatialization */
838
839 lp->link_up = 0;
840
841 lp->max_retry_count = fnic->config.flogi_retries;
842 lp->max_rport_retry_count = fnic->config.plogi_retries;
843 lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
844 FCP_SPPF_CONF_COMPL);
845 if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR)
846 lp->service_params |= FCP_SPPF_RETRY;
847
848 lp->boot_time = jiffies;
849 lp->e_d_tov = fnic->config.ed_tov;
850 lp->r_a_tov = fnic->config.ra_tov;
851 lp->link_supported_speeds = FC_PORTSPEED_10GBIT;
852 fc_set_wwnn(lp, fnic->config.node_wwn);
853 fc_set_wwpn(lp, fnic->config.port_wwn);
854
855 fcoe_libfc_config(lp, &fnic->ctlr, &fnic_transport_template, 0);
856
857 if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START,
858 FCPIO_HOST_EXCH_RANGE_END, NULL)) {
859 err = -ENOMEM;
860 goto err_out_remove_scsi_host;
861 }
862
863 fc_lport_init_stats(lp);
864 fnic->stats_reset_time = jiffies;
865
866 fc_lport_config(lp);
867
868 if (fc_set_mfs(lp, fnic->config.maxdatafieldsize +
869 sizeof(struct fc_frame_header))) {
870 err = -EINVAL;
871 goto err_out_free_exch_mgr;
872 }
873 fc_host_maxframe_size(lp->host) = lp->mfs;
874 fc_host_dev_loss_tmo(lp->host) = fnic->config.port_down_timeout / 1000;
875
876 sprintf(fc_host_symbolic_name(lp->host),
877 DRV_NAME " v" DRV_VERSION " over %s", fnic->name);
878
879 spin_lock_irqsave(&fnic_list_lock, flags);
880 list_add_tail(&fnic->list, &fnic_list);
881 spin_unlock_irqrestore(&fnic_list_lock, flags);
882
883 INIT_WORK(&fnic->link_work, fnic_handle_link);
884 INIT_WORK(&fnic->frame_work, fnic_handle_frame);
885 skb_queue_head_init(&fnic->frame_queue);
886 skb_queue_head_init(&fnic->tx_queue);
887
888 /* Enable all queues */
889 for (i = 0; i < fnic->raw_wq_count; i++)
890 vnic_wq_enable(&fnic->wq[i]);
891 for (i = 0; i < fnic->rq_count; i++)
892 vnic_rq_enable(&fnic->rq[i]);
893 for (i = 0; i < fnic->wq_copy_count; i++)
894 vnic_wq_copy_enable(&fnic->wq_copy[i]);
895
896 fc_fabric_login(lp);
897
898 vnic_dev_enable(fnic->vdev);
899
900 err = fnic_request_intr(fnic);
901 if (err) {
902 shost_printk(KERN_ERR, fnic->lport->host,
903 "Unable to request irq.\n");
904 goto err_out_free_exch_mgr;
905 }
906
907 for (i = 0; i < fnic->intr_count; i++)
908 vnic_intr_unmask(&fnic->intr[i]);
909
910 fnic_notify_timer_start(fnic);
911
912 return 0;
913
914 err_out_free_exch_mgr:
915 fc_exch_mgr_free(lp);
916 err_out_remove_scsi_host:
917 fc_remove_host(lp->host);
918 scsi_remove_host(lp->host);
919 err_out_free_rq_buf:
920 for (i = 0; i < fnic->rq_count; i++)
921 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
922 vnic_dev_notify_unset(fnic->vdev);
923 err_out_free_max_pool:
924 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]);
925 err_out_free_dflt_pool:
926 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]);
927 err_out_free_ioreq_pool:
928 mempool_destroy(fnic->io_req_pool);
929 err_out_free_resources:
930 fnic_free_vnic_resources(fnic);
931 err_out_clear_intr:
932 fnic_clear_intr_mode(fnic);
933 err_out_dev_close:
934 vnic_dev_close(fnic->vdev);
935 err_out_vnic_unregister:
936 vnic_dev_unregister(fnic->vdev);
937 err_out_iounmap:
938 fnic_iounmap(fnic);
939 err_out_release_regions:
940 pci_release_regions(pdev);
941 err_out_disable_device:
942 pci_disable_device(pdev);
943 err_out_free_hba:
944 fnic_stats_debugfs_remove(fnic);
945 scsi_host_put(lp->host);
946 err_out:
947 return err;
948 }
949
950 static void fnic_remove(struct pci_dev *pdev)
951 {
952 struct fnic *fnic = pci_get_drvdata(pdev);
953 struct fc_lport *lp = fnic->lport;
954 unsigned long flags;
955
956 /*
957 * Mark state so that the workqueue thread stops forwarding
958 * received frames and link events to the local port. ISR and
959 * other threads that can queue work items will also stop
960 * creating work items on the fnic workqueue
961 */
962 spin_lock_irqsave(&fnic->fnic_lock, flags);
963 fnic->stop_rx_link_events = 1;
964 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
965
966 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
967 del_timer_sync(&fnic->notify_timer);
968
969 /*
970 * Flush the fnic event queue. After this call, there should
971 * be no event queued for this fnic device in the workqueue
972 */
973 flush_workqueue(fnic_event_queue);
974 skb_queue_purge(&fnic->frame_queue);
975 skb_queue_purge(&fnic->tx_queue);
976
977 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
978 del_timer_sync(&fnic->fip_timer);
979 skb_queue_purge(&fnic->fip_frame_queue);
980 fnic_fcoe_reset_vlans(fnic);
981 fnic_fcoe_evlist_free(fnic);
982 }
983
984 /*
985 * Log off the fabric. This stops all remote ports, dns port,
986 * logs off the fabric. This flushes all rport, disc, lport work
987 * before returning
988 */
989 fc_fabric_logoff(fnic->lport);
990
991 spin_lock_irqsave(&fnic->fnic_lock, flags);
992 fnic->in_remove = 1;
993 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
994
995 fcoe_ctlr_destroy(&fnic->ctlr);
996 fc_lport_destroy(lp);
997 fnic_stats_debugfs_remove(fnic);
998
999 /*
1000 * This stops the fnic device, masks all interrupts. Completed
1001 * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are
1002 * cleaned up
1003 */
1004 fnic_cleanup(fnic);
1005
1006 BUG_ON(!skb_queue_empty(&fnic->frame_queue));
1007 BUG_ON(!skb_queue_empty(&fnic->tx_queue));
1008
1009 spin_lock_irqsave(&fnic_list_lock, flags);
1010 list_del(&fnic->list);
1011 spin_unlock_irqrestore(&fnic_list_lock, flags);
1012
1013 fc_remove_host(fnic->lport->host);
1014 scsi_remove_host(fnic->lport->host);
1015 fc_exch_mgr_free(fnic->lport);
1016 vnic_dev_notify_unset(fnic->vdev);
1017 fnic_free_intr(fnic);
1018 fnic_free_vnic_resources(fnic);
1019 fnic_clear_intr_mode(fnic);
1020 vnic_dev_close(fnic->vdev);
1021 vnic_dev_unregister(fnic->vdev);
1022 fnic_iounmap(fnic);
1023 pci_release_regions(pdev);
1024 pci_disable_device(pdev);
1025 scsi_host_put(lp->host);
1026 }
1027
1028 static struct pci_driver fnic_driver = {
1029 .name = DRV_NAME,
1030 .id_table = fnic_id_table,
1031 .probe = fnic_probe,
1032 .remove = fnic_remove,
1033 };
1034
1035 static int __init fnic_init_module(void)
1036 {
1037 size_t len;
1038 int err = 0;
1039
1040 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
1041
1042 /* Create debugfs entries for fnic */
1043 err = fnic_debugfs_init();
1044 if (err < 0) {
1045 printk(KERN_ERR PFX "Failed to create fnic directory "
1046 "for tracing and stats logging\n");
1047 fnic_debugfs_terminate();
1048 }
1049
1050 /* Allocate memory for trace buffer */
1051 err = fnic_trace_buf_init();
1052 if (err < 0) {
1053 printk(KERN_ERR PFX
1054 "Trace buffer initialization Failed. "
1055 "Fnic Tracing utility is disabled\n");
1056 fnic_trace_free();
1057 }
1058
1059 /* Allocate memory for fc trace buffer */
1060 err = fnic_fc_trace_init();
1061 if (err < 0) {
1062 printk(KERN_ERR PFX "FC trace buffer initialization Failed "
1063 "FC frame tracing utility is disabled\n");
1064 fnic_fc_trace_free();
1065 }
1066
1067 /* Create a cache for allocation of default size sgls */
1068 len = sizeof(struct fnic_dflt_sgl_list);
1069 fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create
1070 ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
1071 SLAB_HWCACHE_ALIGN,
1072 NULL);
1073 if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) {
1074 printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n");
1075 err = -ENOMEM;
1076 goto err_create_fnic_sgl_slab_dflt;
1077 }
1078
1079 /* Create a cache for allocation of max size sgls*/
1080 len = sizeof(struct fnic_sgl_list);
1081 fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create
1082 ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
1083 SLAB_HWCACHE_ALIGN,
1084 NULL);
1085 if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) {
1086 printk(KERN_ERR PFX "failed to create fnic max sgl slab\n");
1087 err = -ENOMEM;
1088 goto err_create_fnic_sgl_slab_max;
1089 }
1090
1091 /* Create a cache of io_req structs for use via mempool */
1092 fnic_io_req_cache = kmem_cache_create("fnic_io_req",
1093 sizeof(struct fnic_io_req),
1094 0, SLAB_HWCACHE_ALIGN, NULL);
1095 if (!fnic_io_req_cache) {
1096 printk(KERN_ERR PFX "failed to create fnic io_req slab\n");
1097 err = -ENOMEM;
1098 goto err_create_fnic_ioreq_slab;
1099 }
1100
1101 fnic_event_queue = create_singlethread_workqueue("fnic_event_wq");
1102 if (!fnic_event_queue) {
1103 printk(KERN_ERR PFX "fnic work queue create failed\n");
1104 err = -ENOMEM;
1105 goto err_create_fnic_workq;
1106 }
1107
1108 spin_lock_init(&fnic_list_lock);
1109 INIT_LIST_HEAD(&fnic_list);
1110
1111 fnic_fip_queue = create_singlethread_workqueue("fnic_fip_q");
1112 if (!fnic_fip_queue) {
1113 printk(KERN_ERR PFX "fnic FIP work queue create failed\n");
1114 err = -ENOMEM;
1115 goto err_create_fip_workq;
1116 }
1117
1118 fnic_fc_transport = fc_attach_transport(&fnic_fc_functions);
1119 if (!fnic_fc_transport) {
1120 printk(KERN_ERR PFX "fc_attach_transport error\n");
1121 err = -ENOMEM;
1122 goto err_fc_transport;
1123 }
1124
1125 /* register the driver with PCI system */
1126 err = pci_register_driver(&fnic_driver);
1127 if (err < 0) {
1128 printk(KERN_ERR PFX "pci register error\n");
1129 goto err_pci_register;
1130 }
1131 return err;
1132
1133 err_pci_register:
1134 fc_release_transport(fnic_fc_transport);
1135 err_fc_transport:
1136 destroy_workqueue(fnic_fip_queue);
1137 err_create_fip_workq:
1138 destroy_workqueue(fnic_event_queue);
1139 err_create_fnic_workq:
1140 kmem_cache_destroy(fnic_io_req_cache);
1141 err_create_fnic_ioreq_slab:
1142 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
1143 err_create_fnic_sgl_slab_max:
1144 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
1145 err_create_fnic_sgl_slab_dflt:
1146 fnic_trace_free();
1147 fnic_fc_trace_free();
1148 fnic_debugfs_terminate();
1149 return err;
1150 }
1151
1152 static void __exit fnic_cleanup_module(void)
1153 {
1154 pci_unregister_driver(&fnic_driver);
1155 destroy_workqueue(fnic_event_queue);
1156 if (fnic_fip_queue) {
1157 flush_workqueue(fnic_fip_queue);
1158 destroy_workqueue(fnic_fip_queue);
1159 }
1160 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
1161 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
1162 kmem_cache_destroy(fnic_io_req_cache);
1163 fc_release_transport(fnic_fc_transport);
1164 fnic_trace_free();
1165 fnic_fc_trace_free();
1166 fnic_debugfs_terminate();
1167 }
1168
1169 module_init(fnic_init_module);
1170 module_exit(fnic_cleanup_module);
1171
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