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x86/mm/pat: Don't report PAT on CPUs that don't support it
[linux/fpc-iii.git] / drivers / scsi / fnic / fnic_main.c
blobba58b7953263af4d211ccce6abebca907d7b802c
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 10000:
180 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
181 break;
182 default:
183 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
184 break;
185 }
186 }
187
188 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host)
189 {
190 int ret;
191 struct fc_lport *lp = shost_priv(host);
192 struct fnic *fnic = lport_priv(lp);
193 struct fc_host_statistics *stats = &lp->host_stats;
194 struct vnic_stats *vs;
195 unsigned long flags;
196
197 if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT))
198 return stats;
199 fnic->stats_time = jiffies;
200
201 spin_lock_irqsave(&fnic->fnic_lock, flags);
202 ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
203 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
204
205 if (ret) {
206 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
207 "fnic: Get vnic stats failed"
208 " 0x%x", ret);
209 return stats;
210 }
211 vs = fnic->stats;
212 stats->tx_frames = vs->tx.tx_unicast_frames_ok;
213 stats->tx_words = vs->tx.tx_unicast_bytes_ok / 4;
214 stats->rx_frames = vs->rx.rx_unicast_frames_ok;
215 stats->rx_words = vs->rx.rx_unicast_bytes_ok / 4;
216 stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors;
217 stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop;
218 stats->invalid_crc_count = vs->rx.rx_crc_errors;
219 stats->seconds_since_last_reset =
220 (jiffies - fnic->stats_reset_time) / HZ;
221 stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000);
222 stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000);
223
224 return stats;
225 }
226
227 /*
228 * fnic_dump_fchost_stats
229 * note : dumps fc_statistics into system logs
230 */
231 void fnic_dump_fchost_stats(struct Scsi_Host *host,
232 struct fc_host_statistics *stats)
233 {
234 FNIC_MAIN_NOTE(KERN_NOTICE, host,
235 "fnic: seconds since last reset = %llu\n",
236 stats->seconds_since_last_reset);
237 FNIC_MAIN_NOTE(KERN_NOTICE, host,
238 "fnic: tx frames = %llu\n",
239 stats->tx_frames);
240 FNIC_MAIN_NOTE(KERN_NOTICE, host,
241 "fnic: tx words = %llu\n",
242 stats->tx_words);
243 FNIC_MAIN_NOTE(KERN_NOTICE, host,
244 "fnic: rx frames = %llu\n",
245 stats->rx_frames);
246 FNIC_MAIN_NOTE(KERN_NOTICE, host,
247 "fnic: rx words = %llu\n",
248 stats->rx_words);
249 FNIC_MAIN_NOTE(KERN_NOTICE, host,
250 "fnic: lip count = %llu\n",
251 stats->lip_count);
252 FNIC_MAIN_NOTE(KERN_NOTICE, host,
253 "fnic: nos count = %llu\n",
254 stats->nos_count);
255 FNIC_MAIN_NOTE(KERN_NOTICE, host,
256 "fnic: error frames = %llu\n",
257 stats->error_frames);
258 FNIC_MAIN_NOTE(KERN_NOTICE, host,
259 "fnic: dumped frames = %llu\n",
260 stats->dumped_frames);
261 FNIC_MAIN_NOTE(KERN_NOTICE, host,
262 "fnic: link failure count = %llu\n",
263 stats->link_failure_count);
264 FNIC_MAIN_NOTE(KERN_NOTICE, host,
265 "fnic: loss of sync count = %llu\n",
266 stats->loss_of_sync_count);
267 FNIC_MAIN_NOTE(KERN_NOTICE, host,
268 "fnic: loss of signal count = %llu\n",
269 stats->loss_of_signal_count);
270 FNIC_MAIN_NOTE(KERN_NOTICE, host,
271 "fnic: prim seq protocol err count = %llu\n",
272 stats->prim_seq_protocol_err_count);
273 FNIC_MAIN_NOTE(KERN_NOTICE, host,
274 "fnic: invalid tx word count= %llu\n",
275 stats->invalid_tx_word_count);
276 FNIC_MAIN_NOTE(KERN_NOTICE, host,
277 "fnic: invalid crc count = %llu\n",
278 stats->invalid_crc_count);
279 FNIC_MAIN_NOTE(KERN_NOTICE, host,
280 "fnic: fcp input requests = %llu\n",
281 stats->fcp_input_requests);
282 FNIC_MAIN_NOTE(KERN_NOTICE, host,
283 "fnic: fcp output requests = %llu\n",
284 stats->fcp_output_requests);
285 FNIC_MAIN_NOTE(KERN_NOTICE, host,
286 "fnic: fcp control requests = %llu\n",
287 stats->fcp_control_requests);
288 FNIC_MAIN_NOTE(KERN_NOTICE, host,
289 "fnic: fcp input megabytes = %llu\n",
290 stats->fcp_input_megabytes);
291 FNIC_MAIN_NOTE(KERN_NOTICE, host,
292 "fnic: fcp output megabytes = %llu\n",
293 stats->fcp_output_megabytes);
294 return;
295 }
296
297 /*
298 * fnic_reset_host_stats : clears host stats
299 * note : called when reset_statistics set under sysfs dir
300 */
301 static void fnic_reset_host_stats(struct Scsi_Host *host)
302 {
303 int ret;
304 struct fc_lport *lp = shost_priv(host);
305 struct fnic *fnic = lport_priv(lp);
306 struct fc_host_statistics *stats;
307 unsigned long flags;
308
309 /* dump current stats, before clearing them */
310 stats = fnic_get_stats(host);
311 fnic_dump_fchost_stats(host, stats);
312
313 spin_lock_irqsave(&fnic->fnic_lock, flags);
314 ret = vnic_dev_stats_clear(fnic->vdev);
315 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
316
317 if (ret) {
318 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
319 "fnic: Reset vnic stats failed"
320 " 0x%x", ret);
321 return;
322 }
323 fnic->stats_reset_time = jiffies;
324 memset(stats, 0, sizeof(*stats));
325
326 return;
327 }
328
329 void fnic_log_q_error(struct fnic *fnic)
330 {
331 unsigned int i;
332 u32 error_status;
333
334 for (i = 0; i < fnic->raw_wq_count; i++) {
335 error_status = ioread32(&fnic->wq[i].ctrl->error_status);
336 if (error_status)
337 shost_printk(KERN_ERR, fnic->lport->host,
338 "WQ[%d] error_status"
339 " %d\n", i, error_status);
340 }
341
342 for (i = 0; i < fnic->rq_count; i++) {
343 error_status = ioread32(&fnic->rq[i].ctrl->error_status);
344 if (error_status)
345 shost_printk(KERN_ERR, fnic->lport->host,
346 "RQ[%d] error_status"
347 " %d\n", i, error_status);
348 }
349
350 for (i = 0; i < fnic->wq_copy_count; i++) {
351 error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status);
352 if (error_status)
353 shost_printk(KERN_ERR, fnic->lport->host,
354 "CWQ[%d] error_status"
355 " %d\n", i, error_status);
356 }
357 }
358
359 void fnic_handle_link_event(struct fnic *fnic)
360 {
361 unsigned long flags;
362
363 spin_lock_irqsave(&fnic->fnic_lock, flags);
364 if (fnic->stop_rx_link_events) {
365 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
366 return;
367 }
368 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
369
370 queue_work(fnic_event_queue, &fnic->link_work);
371
372 }
373
374 static int fnic_notify_set(struct fnic *fnic)
375 {
376 int err;
377
378 switch (vnic_dev_get_intr_mode(fnic->vdev)) {
379 case VNIC_DEV_INTR_MODE_INTX:
380 err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY);
381 break;
382 case VNIC_DEV_INTR_MODE_MSI:
383 err = vnic_dev_notify_set(fnic->vdev, -1);
384 break;
385 case VNIC_DEV_INTR_MODE_MSIX:
386 err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY);
387 break;
388 default:
389 shost_printk(KERN_ERR, fnic->lport->host,
390 "Interrupt mode should be set up"
391 " before devcmd notify set %d\n",
392 vnic_dev_get_intr_mode(fnic->vdev));
393 err = -1;
394 break;
395 }
396
397 return err;
398 }
399
400 static void fnic_notify_timer(unsigned long data)
401 {
402 struct fnic *fnic = (struct fnic *)data;
403
404 fnic_handle_link_event(fnic);
405 mod_timer(&fnic->notify_timer,
406 round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));
407 }
408
409 static void fnic_fip_notify_timer(unsigned long data)
410 {
411 struct fnic *fnic = (struct fnic *)data;
412
413 fnic_handle_fip_timer(fnic);
414 }
415
416 static void fnic_notify_timer_start(struct fnic *fnic)
417 {
418 switch (vnic_dev_get_intr_mode(fnic->vdev)) {
419 case VNIC_DEV_INTR_MODE_MSI:
420 /*
421 * Schedule first timeout immediately. The driver is
422 * initiatialized and ready to look for link up notification
423 */
424 mod_timer(&fnic->notify_timer, jiffies);
425 break;
426 default:
427 /* Using intr for notification for INTx/MSI-X */
428 break;
429 };
430 }
431
432 static int fnic_dev_wait(struct vnic_dev *vdev,
433 int (*start)(struct vnic_dev *, int),
434 int (*finished)(struct vnic_dev *, int *),
435 int arg)
436 {
437 unsigned long time;
438 int done;
439 int err;
440 int count;
441
442 count = 0;
443
444 err = start(vdev, arg);
445 if (err)
446 return err;
447
448 /* Wait for func to complete.
449 * Sometime schedule_timeout_uninterruptible take long time
450 * to wake up so we do not retry as we are only waiting for
451 * 2 seconds in while loop. By adding count, we make sure
452 * we try atleast three times before returning -ETIMEDOUT
453 */
454 time = jiffies + (HZ * 2);
455 do {
456 err = finished(vdev, &done);
457 count++;
458 if (err)
459 return err;
460 if (done)
461 return 0;
462 schedule_timeout_uninterruptible(HZ / 10);
463 } while (time_after(time, jiffies) || (count < 3));
464
465 return -ETIMEDOUT;
466 }
467
468 static int fnic_cleanup(struct fnic *fnic)
469 {
470 unsigned int i;
471 int err;
472
473 vnic_dev_disable(fnic->vdev);
474 for (i = 0; i < fnic->intr_count; i++)
475 vnic_intr_mask(&fnic->intr[i]);
476
477 for (i = 0; i < fnic->rq_count; i++) {
478 err = vnic_rq_disable(&fnic->rq[i]);
479 if (err)
480 return err;
481 }
482 for (i = 0; i < fnic->raw_wq_count; i++) {
483 err = vnic_wq_disable(&fnic->wq[i]);
484 if (err)
485 return err;
486 }
487 for (i = 0; i < fnic->wq_copy_count; i++) {
488 err = vnic_wq_copy_disable(&fnic->wq_copy[i]);
489 if (err)
490 return err;
491 }
492
493 /* Clean up completed IOs and FCS frames */
494 fnic_wq_copy_cmpl_handler(fnic, -1);
495 fnic_wq_cmpl_handler(fnic, -1);
496 fnic_rq_cmpl_handler(fnic, -1);
497
498 /* Clean up the IOs and FCS frames that have not completed */
499 for (i = 0; i < fnic->raw_wq_count; i++)
500 vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf);
501 for (i = 0; i < fnic->rq_count; i++)
502 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
503 for (i = 0; i < fnic->wq_copy_count; i++)
504 vnic_wq_copy_clean(&fnic->wq_copy[i],
505 fnic_wq_copy_cleanup_handler);
506
507 for (i = 0; i < fnic->cq_count; i++)
508 vnic_cq_clean(&fnic->cq[i]);
509 for (i = 0; i < fnic->intr_count; i++)
510 vnic_intr_clean(&fnic->intr[i]);
511
512 mempool_destroy(fnic->io_req_pool);
513 for (i = 0; i < FNIC_SGL_NUM_CACHES; i++)
514 mempool_destroy(fnic->io_sgl_pool[i]);
515
516 return 0;
517 }
518
519 static void fnic_iounmap(struct fnic *fnic)
520 {
521 if (fnic->bar0.vaddr)
522 iounmap(fnic->bar0.vaddr);
523 }
524
525 /**
526 * fnic_get_mac() - get assigned data MAC address for FIP code.
527 * @lport: local port.
528 */
529 static u8 *fnic_get_mac(struct fc_lport *lport)
530 {
531 struct fnic *fnic = lport_priv(lport);
532
533 return fnic->data_src_addr;
534 }
535
536 static void fnic_set_vlan(struct fnic *fnic, u16 vlan_id)
537 {
538 u16 old_vlan;
539 old_vlan = vnic_dev_set_default_vlan(fnic->vdev, vlan_id);
540 }
541
542 static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
543 {
544 struct Scsi_Host *host;
545 struct fc_lport *lp;
546 struct fnic *fnic;
547 mempool_t *pool;
548 int err;
549 int i;
550 unsigned long flags;
551
552 /*
553 * Allocate SCSI Host and set up association between host,
554 * local port, and fnic
555 */
556 lp = libfc_host_alloc(&fnic_host_template, sizeof(struct fnic));
557 if (!lp) {
558 printk(KERN_ERR PFX "Unable to alloc libfc local port\n");
559 err = -ENOMEM;
560 goto err_out;
561 }
562 host = lp->host;
563 fnic = lport_priv(lp);
564 fnic->lport = lp;
565 fnic->ctlr.lp = lp;
566
567 snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME,
568 host->host_no);
569
570 host->transportt = fnic_fc_transport;
571
572 err = fnic_stats_debugfs_init(fnic);
573 if (err) {
574 shost_printk(KERN_ERR, fnic->lport->host,
575 "Failed to initialize debugfs for stats\n");
576 fnic_stats_debugfs_remove(fnic);
577 }
578
579 /* Setup PCI resources */
580 pci_set_drvdata(pdev, fnic);
581
582 fnic->pdev = pdev;
583
584 err = pci_enable_device(pdev);
585 if (err) {
586 shost_printk(KERN_ERR, fnic->lport->host,
587 "Cannot enable PCI device, aborting.\n");
588 goto err_out_free_hba;
589 }
590
591 err = pci_request_regions(pdev, DRV_NAME);
592 if (err) {
593 shost_printk(KERN_ERR, fnic->lport->host,
594 "Cannot enable PCI resources, aborting\n");
595 goto err_out_disable_device;
596 }
597
598 pci_set_master(pdev);
599
600 /* Query PCI controller on system for DMA addressing
601 * limitation for the device. Try 64-bit first, and
602 * fail to 32-bit.
603 */
604 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
605 if (err) {
606 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
607 if (err) {
608 shost_printk(KERN_ERR, fnic->lport->host,
609 "No usable DMA configuration "
610 "aborting\n");
611 goto err_out_release_regions;
612 }
613 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
614 if (err) {
615 shost_printk(KERN_ERR, fnic->lport->host,
616 "Unable to obtain 32-bit DMA "
617 "for consistent allocations, aborting.\n");
618 goto err_out_release_regions;
619 }
620 } else {
621 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
622 if (err) {
623 shost_printk(KERN_ERR, fnic->lport->host,
624 "Unable to obtain 64-bit DMA "
625 "for consistent allocations, aborting.\n");
626 goto err_out_release_regions;
627 }
628 }
629
630 /* Map vNIC resources from BAR0 */
631 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
632 shost_printk(KERN_ERR, fnic->lport->host,
633 "BAR0 not memory-map'able, aborting.\n");
634 err = -ENODEV;
635 goto err_out_release_regions;
636 }
637
638 fnic->bar0.vaddr = pci_iomap(pdev, 0, 0);
639 fnic->bar0.bus_addr = pci_resource_start(pdev, 0);
640 fnic->bar0.len = pci_resource_len(pdev, 0);
641
642 if (!fnic->bar0.vaddr) {
643 shost_printk(KERN_ERR, fnic->lport->host,
644 "Cannot memory-map BAR0 res hdr, "
645 "aborting.\n");
646 err = -ENODEV;
647 goto err_out_release_regions;
648 }
649
650 fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0);
651 if (!fnic->vdev) {
652 shost_printk(KERN_ERR, fnic->lport->host,
653 "vNIC registration failed, "
654 "aborting.\n");
655 err = -ENODEV;
656 goto err_out_iounmap;
657 }
658
659 err = fnic_dev_wait(fnic->vdev, vnic_dev_open,
660 vnic_dev_open_done, 0);
661 if (err) {
662 shost_printk(KERN_ERR, fnic->lport->host,
663 "vNIC dev open failed, aborting.\n");
664 goto err_out_vnic_unregister;
665 }
666
667 err = vnic_dev_init(fnic->vdev, 0);
668 if (err) {
669 shost_printk(KERN_ERR, fnic->lport->host,
670 "vNIC dev init failed, aborting.\n");
671 goto err_out_dev_close;
672 }
673
674 err = vnic_dev_mac_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
675 if (err) {
676 shost_printk(KERN_ERR, fnic->lport->host,
677 "vNIC get MAC addr failed \n");
678 goto err_out_dev_close;
679 }
680 /* set data_src for point-to-point mode and to keep it non-zero */
681 memcpy(fnic->data_src_addr, fnic->ctlr.ctl_src_addr, ETH_ALEN);
682
683 /* Get vNIC configuration */
684 err = fnic_get_vnic_config(fnic);
685 if (err) {
686 shost_printk(KERN_ERR, fnic->lport->host,
687 "Get vNIC configuration failed, "
688 "aborting.\n");
689 goto err_out_dev_close;
690 }
691
692 /* Configure Maximum Outstanding IO reqs*/
693 if (fnic->config.io_throttle_count != FNIC_UCSM_DFLT_THROTTLE_CNT_BLD) {
694 host->can_queue = min_t(u32, FNIC_MAX_IO_REQ,
695 max_t(u32, FNIC_MIN_IO_REQ,
696 fnic->config.io_throttle_count));
697 }
698 fnic->fnic_max_tag_id = host->can_queue;
699
700 host->max_lun = fnic->config.luns_per_tgt;
701 host->max_id = FNIC_MAX_FCP_TARGET;
702 host->max_cmd_len = FCOE_MAX_CMD_LEN;
703
704 fnic_get_res_counts(fnic);
705
706 err = fnic_set_intr_mode(fnic);
707 if (err) {
708 shost_printk(KERN_ERR, fnic->lport->host,
709 "Failed to set intr mode, "
710 "aborting.\n");
711 goto err_out_dev_close;
712 }
713
714 err = fnic_alloc_vnic_resources(fnic);
715 if (err) {
716 shost_printk(KERN_ERR, fnic->lport->host,
717 "Failed to alloc vNIC resources, "
718 "aborting.\n");
719 goto err_out_clear_intr;
720 }
721
722
723 /* initialize all fnic locks */
724 spin_lock_init(&fnic->fnic_lock);
725
726 for (i = 0; i < FNIC_WQ_MAX; i++)
727 spin_lock_init(&fnic->wq_lock[i]);
728
729 for (i = 0; i < FNIC_WQ_COPY_MAX; i++) {
730 spin_lock_init(&fnic->wq_copy_lock[i]);
731 fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK;
732 fnic->fw_ack_recd[i] = 0;
733 fnic->fw_ack_index[i] = -1;
734 }
735
736 for (i = 0; i < FNIC_IO_LOCKS; i++)
737 spin_lock_init(&fnic->io_req_lock[i]);
738
739 fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache);
740 if (!fnic->io_req_pool)
741 goto err_out_free_resources;
742
743 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
744 if (!pool)
745 goto err_out_free_ioreq_pool;
746 fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool;
747
748 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
749 if (!pool)
750 goto err_out_free_dflt_pool;
751 fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool;
752
753 /* setup vlan config, hw inserts vlan header */
754 fnic->vlan_hw_insert = 1;
755 fnic->vlan_id = 0;
756
757 /* Initialize the FIP fcoe_ctrl struct */
758 fnic->ctlr.send = fnic_eth_send;
759 fnic->ctlr.update_mac = fnic_update_mac;
760 fnic->ctlr.get_src_addr = fnic_get_mac;
761 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
762 shost_printk(KERN_INFO, fnic->lport->host,
763 "firmware supports FIP\n");
764 /* enable directed and multicast */
765 vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0);
766 vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS);
767 vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
768 fnic->set_vlan = fnic_set_vlan;
769 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO);
770 setup_timer(&fnic->fip_timer, fnic_fip_notify_timer,
771 (unsigned long)fnic);
772 spin_lock_init(&fnic->vlans_lock);
773 INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame);
774 INIT_WORK(&fnic->event_work, fnic_handle_event);
775 skb_queue_head_init(&fnic->fip_frame_queue);
776 INIT_LIST_HEAD(&fnic->evlist);
777 INIT_LIST_HEAD(&fnic->vlans);
778 } else {
779 shost_printk(KERN_INFO, fnic->lport->host,
780 "firmware uses non-FIP mode\n");
781 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP);
782 fnic->ctlr.state = FIP_ST_NON_FIP;
783 }
784 fnic->state = FNIC_IN_FC_MODE;
785
786 atomic_set(&fnic->in_flight, 0);
787 fnic->state_flags = FNIC_FLAGS_NONE;
788
789 /* Enable hardware stripping of vlan header on ingress */
790 fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1);
791
792 /* Setup notification buffer area */
793 err = fnic_notify_set(fnic);
794 if (err) {
795 shost_printk(KERN_ERR, fnic->lport->host,
796 "Failed to alloc notify buffer, aborting.\n");
797 goto err_out_free_max_pool;
798 }
799
800 /* Setup notify timer when using MSI interrupts */
801 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
802 setup_timer(&fnic->notify_timer,
803 fnic_notify_timer, (unsigned long)fnic);
804
805 /* allocate RQ buffers and post them to RQ*/
806 for (i = 0; i < fnic->rq_count; i++) {
807 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
808 if (err) {
809 shost_printk(KERN_ERR, fnic->lport->host,
810 "fnic_alloc_rq_frame can't alloc "
811 "frame\n");
812 goto err_out_free_rq_buf;
813 }
814 }
815
816 /*
817 * Initialization done with PCI system, hardware, firmware.
818 * Add host to SCSI
819 */
820 err = scsi_add_host(lp->host, &pdev->dev);
821 if (err) {
822 shost_printk(KERN_ERR, fnic->lport->host,
823 "fnic: scsi_add_host failed...exiting\n");
824 goto err_out_free_rq_buf;
825 }
826
827 /* Start local port initiatialization */
828
829 lp->link_up = 0;
830
831 lp->max_retry_count = fnic->config.flogi_retries;
832 lp->max_rport_retry_count = fnic->config.plogi_retries;
833 lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
834 FCP_SPPF_CONF_COMPL);
835 if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR)
836 lp->service_params |= FCP_SPPF_RETRY;
837
838 lp->boot_time = jiffies;
839 lp->e_d_tov = fnic->config.ed_tov;
840 lp->r_a_tov = fnic->config.ra_tov;
841 lp->link_supported_speeds = FC_PORTSPEED_10GBIT;
842 fc_set_wwnn(lp, fnic->config.node_wwn);
843 fc_set_wwpn(lp, fnic->config.port_wwn);
844
845 fcoe_libfc_config(lp, &fnic->ctlr, &fnic_transport_template, 0);
846
847 if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START,
848 FCPIO_HOST_EXCH_RANGE_END, NULL)) {
849 err = -ENOMEM;
850 goto err_out_remove_scsi_host;
851 }
852
853 fc_lport_init_stats(lp);
854 fnic->stats_reset_time = jiffies;
855
856 fc_lport_config(lp);
857
858 if (fc_set_mfs(lp, fnic->config.maxdatafieldsize +
859 sizeof(struct fc_frame_header))) {
860 err = -EINVAL;
861 goto err_out_free_exch_mgr;
862 }
863 fc_host_maxframe_size(lp->host) = lp->mfs;
864 fc_host_dev_loss_tmo(lp->host) = fnic->config.port_down_timeout / 1000;
865
866 sprintf(fc_host_symbolic_name(lp->host),
867 DRV_NAME " v" DRV_VERSION " over %s", fnic->name);
868
869 spin_lock_irqsave(&fnic_list_lock, flags);
870 list_add_tail(&fnic->list, &fnic_list);
871 spin_unlock_irqrestore(&fnic_list_lock, flags);
872
873 INIT_WORK(&fnic->link_work, fnic_handle_link);
874 INIT_WORK(&fnic->frame_work, fnic_handle_frame);
875 skb_queue_head_init(&fnic->frame_queue);
876 skb_queue_head_init(&fnic->tx_queue);
877
878 /* Enable all queues */
879 for (i = 0; i < fnic->raw_wq_count; i++)
880 vnic_wq_enable(&fnic->wq[i]);
881 for (i = 0; i < fnic->rq_count; i++)
882 vnic_rq_enable(&fnic->rq[i]);
883 for (i = 0; i < fnic->wq_copy_count; i++)
884 vnic_wq_copy_enable(&fnic->wq_copy[i]);
885
886 fc_fabric_login(lp);
887
888 vnic_dev_enable(fnic->vdev);
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 for (i = 0; i < fnic->intr_count; i++)
898 vnic_intr_unmask(&fnic->intr[i]);
899
900 fnic_notify_timer_start(fnic);
901
902 return 0;
903
904 err_out_free_exch_mgr:
905 fc_exch_mgr_free(lp);
906 err_out_remove_scsi_host:
907 fc_remove_host(lp->host);
908 scsi_remove_host(lp->host);
909 err_out_free_rq_buf:
910 for (i = 0; i < fnic->rq_count; i++)
911 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
912 vnic_dev_notify_unset(fnic->vdev);
913 err_out_free_max_pool:
914 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]);
915 err_out_free_dflt_pool:
916 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]);
917 err_out_free_ioreq_pool:
918 mempool_destroy(fnic->io_req_pool);
919 err_out_free_resources:
920 fnic_free_vnic_resources(fnic);
921 err_out_clear_intr:
922 fnic_clear_intr_mode(fnic);
923 err_out_dev_close:
924 vnic_dev_close(fnic->vdev);
925 err_out_vnic_unregister:
926 vnic_dev_unregister(fnic->vdev);
927 err_out_iounmap:
928 fnic_iounmap(fnic);
929 err_out_release_regions:
930 pci_release_regions(pdev);
931 err_out_disable_device:
932 pci_disable_device(pdev);
933 err_out_free_hba:
934 fnic_stats_debugfs_remove(fnic);
935 scsi_host_put(lp->host);
936 err_out:
937 return err;
938 }
939
940 static void fnic_remove(struct pci_dev *pdev)
941 {
942 struct fnic *fnic = pci_get_drvdata(pdev);
943 struct fc_lport *lp = fnic->lport;
944 unsigned long flags;
945
946 /*
947 * Mark state so that the workqueue thread stops forwarding
948 * received frames and link events to the local port. ISR and
949 * other threads that can queue work items will also stop
950 * creating work items on the fnic workqueue
951 */
952 spin_lock_irqsave(&fnic->fnic_lock, flags);
953 fnic->stop_rx_link_events = 1;
954 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
955
956 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
957 del_timer_sync(&fnic->notify_timer);
958
959 /*
960 * Flush the fnic event queue. After this call, there should
961 * be no event queued for this fnic device in the workqueue
962 */
963 flush_workqueue(fnic_event_queue);
964 skb_queue_purge(&fnic->frame_queue);
965 skb_queue_purge(&fnic->tx_queue);
966
967 if (fnic->config.flags & VFCF_FIP_CAPABLE) {
968 del_timer_sync(&fnic->fip_timer);
969 skb_queue_purge(&fnic->fip_frame_queue);
970 fnic_fcoe_reset_vlans(fnic);
971 fnic_fcoe_evlist_free(fnic);
972 }
973
974 /*
975 * Log off the fabric. This stops all remote ports, dns port,
976 * logs off the fabric. This flushes all rport, disc, lport work
977 * before returning
978 */
979 fc_fabric_logoff(fnic->lport);
980
981 spin_lock_irqsave(&fnic->fnic_lock, flags);
982 fnic->in_remove = 1;
983 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
984
985 fcoe_ctlr_destroy(&fnic->ctlr);
986 fc_lport_destroy(lp);
987 fnic_stats_debugfs_remove(fnic);
988
989 /*
990 * This stops the fnic device, masks all interrupts. Completed
991 * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are
992 * cleaned up
993 */
994 fnic_cleanup(fnic);
995
996 BUG_ON(!skb_queue_empty(&fnic->frame_queue));
997 BUG_ON(!skb_queue_empty(&fnic->tx_queue));
998
999 spin_lock_irqsave(&fnic_list_lock, flags);
1000 list_del(&fnic->list);
1001 spin_unlock_irqrestore(&fnic_list_lock, flags);
1002
1003 fc_remove_host(fnic->lport->host);
1004 scsi_remove_host(fnic->lport->host);
1005 fc_exch_mgr_free(fnic->lport);
1006 vnic_dev_notify_unset(fnic->vdev);
1007 fnic_free_intr(fnic);
1008 fnic_free_vnic_resources(fnic);
1009 fnic_clear_intr_mode(fnic);
1010 vnic_dev_close(fnic->vdev);
1011 vnic_dev_unregister(fnic->vdev);
1012 fnic_iounmap(fnic);
1013 pci_release_regions(pdev);
1014 pci_disable_device(pdev);
1015 scsi_host_put(lp->host);
1016 }
1017
1018 static struct pci_driver fnic_driver = {
1019 .name = DRV_NAME,
1020 .id_table = fnic_id_table,
1021 .probe = fnic_probe,
1022 .remove = fnic_remove,
1023 };
1024
1025 static int __init fnic_init_module(void)
1026 {
1027 size_t len;
1028 int err = 0;
1029
1030 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
1031
1032 /* Create debugfs entries for fnic */
1033 err = fnic_debugfs_init();
1034 if (err < 0) {
1035 printk(KERN_ERR PFX "Failed to create fnic directory "
1036 "for tracing and stats logging\n");
1037 fnic_debugfs_terminate();
1038 }
1039
1040 /* Allocate memory for trace buffer */
1041 err = fnic_trace_buf_init();
1042 if (err < 0) {
1043 printk(KERN_ERR PFX
1044 "Trace buffer initialization Failed. "
1045 "Fnic Tracing utility is disabled\n");
1046 fnic_trace_free();
1047 }
1048
1049 /* Allocate memory for fc trace buffer */
1050 err = fnic_fc_trace_init();
1051 if (err < 0) {
1052 printk(KERN_ERR PFX "FC trace buffer initialization Failed "
1053 "FC frame tracing utility is disabled\n");
1054 fnic_fc_trace_free();
1055 }
1056
1057 /* Create a cache for allocation of default size sgls */
1058 len = sizeof(struct fnic_dflt_sgl_list);
1059 fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create
1060 ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
1061 SLAB_HWCACHE_ALIGN,
1062 NULL);
1063 if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) {
1064 printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n");
1065 err = -ENOMEM;
1066 goto err_create_fnic_sgl_slab_dflt;
1067 }
1068
1069 /* Create a cache for allocation of max size sgls*/
1070 len = sizeof(struct fnic_sgl_list);
1071 fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create
1072 ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
1073 SLAB_HWCACHE_ALIGN,
1074 NULL);
1075 if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) {
1076 printk(KERN_ERR PFX "failed to create fnic max sgl slab\n");
1077 err = -ENOMEM;
1078 goto err_create_fnic_sgl_slab_max;
1079 }
1080
1081 /* Create a cache of io_req structs for use via mempool */
1082 fnic_io_req_cache = kmem_cache_create("fnic_io_req",
1083 sizeof(struct fnic_io_req),
1084 0, SLAB_HWCACHE_ALIGN, NULL);
1085 if (!fnic_io_req_cache) {
1086 printk(KERN_ERR PFX "failed to create fnic io_req slab\n");
1087 err = -ENOMEM;
1088 goto err_create_fnic_ioreq_slab;
1089 }
1090
1091 fnic_event_queue = create_singlethread_workqueue("fnic_event_wq");
1092 if (!fnic_event_queue) {
1093 printk(KERN_ERR PFX "fnic work queue create failed\n");
1094 err = -ENOMEM;
1095 goto err_create_fnic_workq;
1096 }
1097
1098 spin_lock_init(&fnic_list_lock);
1099 INIT_LIST_HEAD(&fnic_list);
1100
1101 fnic_fip_queue = create_singlethread_workqueue("fnic_fip_q");
1102 if (!fnic_fip_queue) {
1103 printk(KERN_ERR PFX "fnic FIP work queue create failed\n");
1104 err = -ENOMEM;
1105 goto err_create_fip_workq;
1106 }
1107
1108 fnic_fc_transport = fc_attach_transport(&fnic_fc_functions);
1109 if (!fnic_fc_transport) {
1110 printk(KERN_ERR PFX "fc_attach_transport error\n");
1111 err = -ENOMEM;
1112 goto err_fc_transport;
1113 }
1114
1115 /* register the driver with PCI system */
1116 err = pci_register_driver(&fnic_driver);
1117 if (err < 0) {
1118 printk(KERN_ERR PFX "pci register error\n");
1119 goto err_pci_register;
1120 }
1121 return err;
1122
1123 err_pci_register:
1124 fc_release_transport(fnic_fc_transport);
1125 err_fc_transport:
1126 destroy_workqueue(fnic_fip_queue);
1127 err_create_fip_workq:
1128 destroy_workqueue(fnic_event_queue);
1129 err_create_fnic_workq:
1130 kmem_cache_destroy(fnic_io_req_cache);
1131 err_create_fnic_ioreq_slab:
1132 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
1133 err_create_fnic_sgl_slab_max:
1134 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
1135 err_create_fnic_sgl_slab_dflt:
1136 fnic_trace_free();
1137 fnic_fc_trace_free();
1138 fnic_debugfs_terminate();
1139 return err;
1140 }
1141
1142 static void __exit fnic_cleanup_module(void)
1143 {
1144 pci_unregister_driver(&fnic_driver);
1145 destroy_workqueue(fnic_event_queue);
1146 if (fnic_fip_queue) {
1147 flush_workqueue(fnic_fip_queue);
1148 destroy_workqueue(fnic_fip_queue);
1149 }
1150 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
1151 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
1152 kmem_cache_destroy(fnic_io_req_cache);
1153 fc_release_transport(fnic_fc_transport);
1154 fnic_trace_free();
1155 fnic_fc_trace_free();
1156 fnic_debugfs_terminate();
1157 }
1158
1159 module_init(fnic_init_module);
1160 module_exit(fnic_cleanup_module);
1161
Linux with added FPC-III support