1 /*******************************************************************
2 * This file is part of the Emulex Linux Device Driver for *
3 * Fibre Channel Host Bus Adapters. *
4 * Copyright (C) 2004-2013 Emulex. All rights reserved. *
5 * EMULEX and SLI are trademarks of Emulex. *
6 * www.emulex.com *
7 * Portions Copyright (C) 2004-2005 Christoph Hellwig *
8 * *
9 * This program is free software; you can redistribute it and/or *
10 * modify it under the terms of version 2 of the GNU General *
11 * Public License as published by the Free Software Foundation. *
12 * This program is distributed in the hope that it will be useful. *
13 * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND *
14 * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, *
15 * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE *
16 * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
17 * TO BE LEGALLY INVALID. See the GNU General Public License for *
18 * more details, a copy of which can be found in the file COPYING *
19 * included with this package. *
20 *******************************************************************/
21
22 #include <linux/blkdev.h>
23 #include <linux/delay.h>
24 #include <linux/dma-mapping.h>
25 #include <linux/idr.h>
26 #include <linux/interrupt.h>
27 #include <linux/kthread.h>
28 #include <linux/pci.h>
29 #include <linux/slab.h>
30 #include <linux/spinlock.h>
31
32 #include <scsi/scsi.h>
33 #include <scsi/scsi_device.h>
34 #include <scsi/scsi_host.h>
35 #include <scsi/scsi_transport_fc.h>
36 #include "lpfc_hw4.h"
37 #include "lpfc_hw.h"
38 #include "lpfc_sli.h"
39 #include "lpfc_sli4.h"
40 #include "lpfc_nl.h"
41 #include "lpfc_disc.h"
42 #include "lpfc_scsi.h"
43 #include "lpfc.h"
44 #include "lpfc_logmsg.h"
45 #include "lpfc_crtn.h"
46 #include "lpfc_version.h"
47 #include "lpfc_vport.h"
48
lpfc_vport_set_state(struct lpfc_vport * vport,enum fc_vport_state new_state)49 inline void lpfc_vport_set_state(struct lpfc_vport *vport,
50 enum fc_vport_state new_state)
51 {
52 struct fc_vport *fc_vport = vport->fc_vport;
53
54 if (fc_vport) {
55 /*
56 * When the transport defines fc_vport_set state we will replace
57 * this code with the following line
58 */
59 /* fc_vport_set_state(fc_vport, new_state); */
60 if (new_state != FC_VPORT_INITIALIZING)
61 fc_vport->vport_last_state = fc_vport->vport_state;
62 fc_vport->vport_state = new_state;
63 }
64
65 /* for all the error states we will set the invternal state to FAILED */
66 switch (new_state) {
67 case FC_VPORT_NO_FABRIC_SUPP:
68 case FC_VPORT_NO_FABRIC_RSCS:
69 case FC_VPORT_FABRIC_LOGOUT:
70 case FC_VPORT_FABRIC_REJ_WWN:
71 case FC_VPORT_FAILED:
72 vport->port_state = LPFC_VPORT_FAILED;
73 break;
74 case FC_VPORT_LINKDOWN:
75 vport->port_state = LPFC_VPORT_UNKNOWN;
76 break;
77 default:
78 /* do nothing */
79 break;
80 }
81 }
82
83 int
lpfc_alloc_vpi(struct lpfc_hba * phba)84 lpfc_alloc_vpi(struct lpfc_hba *phba)
85 {
86 unsigned long vpi;
87
88 spin_lock_irq(&phba->hbalock);
89 /* Start at bit 1 because vpi zero is reserved for the physical port */
90 vpi = find_next_zero_bit(phba->vpi_bmask, (phba->max_vpi + 1), 1);
91 if (vpi > phba->max_vpi)
92 vpi = 0;
93 else
94 set_bit(vpi, phba->vpi_bmask);
95 if (phba->sli_rev == LPFC_SLI_REV4)
96 phba->sli4_hba.max_cfg_param.vpi_used++;
97 spin_unlock_irq(&phba->hbalock);
98 return vpi;
99 }
100
101 static void
lpfc_free_vpi(struct lpfc_hba * phba,int vpi)102 lpfc_free_vpi(struct lpfc_hba *phba, int vpi)
103 {
104 if (vpi == 0)
105 return;
106 spin_lock_irq(&phba->hbalock);
107 clear_bit(vpi, phba->vpi_bmask);
108 if (phba->sli_rev == LPFC_SLI_REV4)
109 phba->sli4_hba.max_cfg_param.vpi_used--;
110 spin_unlock_irq(&phba->hbalock);
111 }
112
113 static int
lpfc_vport_sparm(struct lpfc_hba * phba,struct lpfc_vport * vport)114 lpfc_vport_sparm(struct lpfc_hba *phba, struct lpfc_vport *vport)
115 {
116 LPFC_MBOXQ_t *pmb;
117 MAILBOX_t *mb;
118 struct lpfc_dmabuf *mp;
119 int rc;
120
121 pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
122 if (!pmb) {
123 return -ENOMEM;
124 }
125 mb = &pmb->u.mb;
126
127 rc = lpfc_read_sparam(phba, pmb, vport->vpi);
128 if (rc) {
129 mempool_free(pmb, phba->mbox_mem_pool);
130 return -ENOMEM;
131 }
132
133 /*
134 * Grab buffer pointer and clear context1 so we can use
135 * lpfc_sli_issue_box_wait
136 */
137 mp = (struct lpfc_dmabuf *) pmb->context1;
138 pmb->context1 = NULL;
139
140 pmb->vport = vport;
141 rc = lpfc_sli_issue_mbox_wait(phba, pmb, phba->fc_ratov * 2);
142 if (rc != MBX_SUCCESS) {
143 if (signal_pending(current)) {
144 lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
145 "1830 Signal aborted mbxCmd x%x\n",
146 mb->mbxCommand);
147 lpfc_mbuf_free(phba, mp->virt, mp->phys);
148 kfree(mp);
149 if (rc != MBX_TIMEOUT)
150 mempool_free(pmb, phba->mbox_mem_pool);
151 return -EINTR;
152 } else {
153 lpfc_printf_vlog(vport, KERN_ERR, LOG_INIT | LOG_VPORT,
154 "1818 VPort failed init, mbxCmd x%x "
155 "READ_SPARM mbxStatus x%x, rc = x%x\n",
156 mb->mbxCommand, mb->mbxStatus, rc);
157 lpfc_mbuf_free(phba, mp->virt, mp->phys);
158 kfree(mp);
159 if (rc != MBX_TIMEOUT)
160 mempool_free(pmb, phba->mbox_mem_pool);
161 return -EIO;
162 }
163 }
164
165 memcpy(&vport->fc_sparam, mp->virt, sizeof (struct serv_parm));
166 memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
167 sizeof (struct lpfc_name));
168 memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
169 sizeof (struct lpfc_name));
170
171 lpfc_mbuf_free(phba, mp->virt, mp->phys);
172 kfree(mp);
173 mempool_free(pmb, phba->mbox_mem_pool);
174
175 return 0;
176 }
177
178 static int
lpfc_valid_wwn_format(struct lpfc_hba * phba,struct lpfc_name * wwn,const char * name_type)179 lpfc_valid_wwn_format(struct lpfc_hba *phba, struct lpfc_name *wwn,
180 const char *name_type)
181 {
182 /* ensure that IEEE format 1 addresses
183 * contain zeros in bits 59-48
184 */
185 if (!((wwn->u.wwn[0] >> 4) == 1 &&
186 ((wwn->u.wwn[0] & 0xf) != 0 || (wwn->u.wwn[1] & 0xf) != 0)))
187 return 1;
188
189 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
190 "1822 Invalid %s: %02x:%02x:%02x:%02x:"
191 "%02x:%02x:%02x:%02x\n",
192 name_type,
193 wwn->u.wwn[0], wwn->u.wwn[1],
194 wwn->u.wwn[2], wwn->u.wwn[3],
195 wwn->u.wwn[4], wwn->u.wwn[5],
196 wwn->u.wwn[6], wwn->u.wwn[7]);
197 return 0;
198 }
199
200 static int
lpfc_unique_wwpn(struct lpfc_hba * phba,struct lpfc_vport * new_vport)201 lpfc_unique_wwpn(struct lpfc_hba *phba, struct lpfc_vport *new_vport)
202 {
203 struct lpfc_vport *vport;
204 unsigned long flags;
205
206 spin_lock_irqsave(&phba->hbalock, flags);
207 list_for_each_entry(vport, &phba->port_list, listentry) {
208 if (vport == new_vport)
209 continue;
210 /* If they match, return not unique */
211 if (memcmp(&vport->fc_sparam.portName,
212 &new_vport->fc_sparam.portName,
213 sizeof(struct lpfc_name)) == 0) {
214 spin_unlock_irqrestore(&phba->hbalock, flags);
215 return 0;
216 }
217 }
218 spin_unlock_irqrestore(&phba->hbalock, flags);
219 return 1;
220 }
221
222 /**
223 * lpfc_discovery_wait - Wait for driver discovery to quiesce
224 * @vport: The virtual port for which this call is being executed.
225 *
226 * This driver calls this routine specifically from lpfc_vport_delete
227 * to enforce a synchronous execution of vport
228 * delete relative to discovery activities. The
229 * lpfc_vport_delete routine should not return until it
230 * can reasonably guarantee that discovery has quiesced.
231 * Post FDISC LOGO, the driver must wait until its SAN teardown is
232 * complete and all resources recovered before allowing
233 * cleanup.
234 *
235 * This routine does not require any locks held.
236 **/
lpfc_discovery_wait(struct lpfc_vport * vport)237 static void lpfc_discovery_wait(struct lpfc_vport *vport)
238 {
239 struct lpfc_hba *phba = vport->phba;
240 uint32_t wait_flags = 0;
241 unsigned long wait_time_max;
242 unsigned long start_time;
243
244 wait_flags = FC_RSCN_MODE | FC_RSCN_DISCOVERY | FC_NLP_MORE |
245 FC_RSCN_DEFERRED | FC_NDISC_ACTIVE | FC_DISC_TMO;
246
247 /*
248 * The time constraint on this loop is a balance between the
249 * fabric RA_TOV value and dev_loss tmo. The driver's
250 * devloss_tmo is 10 giving this loop a 3x multiplier minimally.
251 */
252 wait_time_max = msecs_to_jiffies(((phba->fc_ratov * 3) + 3) * 1000);
253 wait_time_max += jiffies;
254 start_time = jiffies;
255 while (time_before(jiffies, wait_time_max)) {
256 if ((vport->num_disc_nodes > 0) ||
257 (vport->fc_flag & wait_flags) ||
258 ((vport->port_state > LPFC_VPORT_FAILED) &&
259 (vport->port_state < LPFC_VPORT_READY))) {
260 lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
261 "1833 Vport discovery quiesce Wait:"
262 " state x%x fc_flags x%x"
263 " num_nodes x%x, waiting 1000 msecs"
264 " total wait msecs x%x\n",
265 vport->port_state, vport->fc_flag,
266 vport->num_disc_nodes,
267 jiffies_to_msecs(jiffies - start_time));
268 msleep(1000);
269 } else {
270 /* Base case. Wait variants satisfied. Break out */
271 lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
272 "1834 Vport discovery quiesced:"
273 " state x%x fc_flags x%x"
274 " wait msecs x%x\n",
275 vport->port_state, vport->fc_flag,
276 jiffies_to_msecs(jiffies
277 - start_time));
278 break;
279 }
280 }
281
282 if (time_after(jiffies, wait_time_max))
283 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
284 "1835 Vport discovery quiesce failed:"
285 " state x%x fc_flags x%x wait msecs x%x\n",
286 vport->port_state, vport->fc_flag,
287 jiffies_to_msecs(jiffies - start_time));
288 }
289
290 int
lpfc_vport_create(struct fc_vport * fc_vport,bool disable)291 lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
292 {
293 struct lpfc_nodelist *ndlp;
294 struct Scsi_Host *shost = fc_vport->shost;
295 struct lpfc_vport *pport = (struct lpfc_vport *) shost->hostdata;
296 struct lpfc_hba *phba = pport->phba;
297 struct lpfc_vport *vport = NULL;
298 int instance;
299 int vpi;
300 int rc = VPORT_ERROR;
301 int status;
302
303 if ((phba->sli_rev < 3) || !(phba->cfg_enable_npiv)) {
304 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
305 "1808 Create VPORT failed: "
306 "NPIV is not enabled: SLImode:%d\n",
307 phba->sli_rev);
308 rc = VPORT_INVAL;
309 goto error_out;
310 }
311
312 vpi = lpfc_alloc_vpi(phba);
313 if (vpi == 0) {
314 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
315 "1809 Create VPORT failed: "
316 "Max VPORTs (%d) exceeded\n",
317 phba->max_vpi);
318 rc = VPORT_NORESOURCES;
319 goto error_out;
320 }
321
322 /* Assign an unused board number */
323 if ((instance = lpfc_get_instance()) < 0) {
324 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
325 "1810 Create VPORT failed: Cannot get "
326 "instance number\n");
327 lpfc_free_vpi(phba, vpi);
328 rc = VPORT_NORESOURCES;
329 goto error_out;
330 }
331
332 vport = lpfc_create_port(phba, instance, &fc_vport->dev);
333 if (!vport) {
334 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
335 "1811 Create VPORT failed: vpi x%x\n", vpi);
336 lpfc_free_vpi(phba, vpi);
337 rc = VPORT_NORESOURCES;
338 goto error_out;
339 }
340
341 vport->vpi = vpi;
342 lpfc_debugfs_initialize(vport);
343
344 if ((status = lpfc_vport_sparm(phba, vport))) {
345 if (status == -EINTR) {
346 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
347 "1831 Create VPORT Interrupted.\n");
348 rc = VPORT_ERROR;
349 } else {
350 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
351 "1813 Create VPORT failed. "
352 "Cannot get sparam\n");
353 rc = VPORT_NORESOURCES;
354 }
355 lpfc_free_vpi(phba, vpi);
356 destroy_port(vport);
357 goto error_out;
358 }
359
360 u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
361 u64_to_wwn(fc_vport->port_name, vport->fc_portname.u.wwn);
362
363 memcpy(&vport->fc_sparam.portName, vport->fc_portname.u.wwn, 8);
364 memcpy(&vport->fc_sparam.nodeName, vport->fc_nodename.u.wwn, 8);
365
366 if (!lpfc_valid_wwn_format(phba, &vport->fc_sparam.nodeName, "WWNN") ||
367 !lpfc_valid_wwn_format(phba, &vport->fc_sparam.portName, "WWPN")) {
368 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
369 "1821 Create VPORT failed. "
370 "Invalid WWN format\n");
371 lpfc_free_vpi(phba, vpi);
372 destroy_port(vport);
373 rc = VPORT_INVAL;
374 goto error_out;
375 }
376
377 if (!lpfc_unique_wwpn(phba, vport)) {
378 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
379 "1823 Create VPORT failed. "
380 "Duplicate WWN on HBA\n");
381 lpfc_free_vpi(phba, vpi);
382 destroy_port(vport);
383 rc = VPORT_INVAL;
384 goto error_out;
385 }
386
387 /* Create binary sysfs attribute for vport */
388 lpfc_alloc_sysfs_attr(vport);
389
390 /* Set the DFT_LUN_Q_DEPTH accordingly */
391 vport->cfg_lun_queue_depth = phba->pport->cfg_lun_queue_depth;
392
393 *(struct lpfc_vport **)fc_vport->dd_data = vport;
394 vport->fc_vport = fc_vport;
395
396 /*
397 * In SLI4, the vpi must be activated before it can be used
398 * by the port.
399 */
400 if ((phba->sli_rev == LPFC_SLI_REV4) &&
401 (pport->fc_flag & FC_VFI_REGISTERED)) {
402 rc = lpfc_sli4_init_vpi(vport);
403 if (rc) {
404 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
405 "1838 Failed to INIT_VPI on vpi %d "
406 "status %d\n", vpi, rc);
407 rc = VPORT_NORESOURCES;
408 lpfc_free_vpi(phba, vpi);
409 goto error_out;
410 }
411 } else if (phba->sli_rev == LPFC_SLI_REV4) {
412 /*
413 * Driver cannot INIT_VPI now. Set the flags to
414 * init_vpi when reg_vfi complete.
415 */
416 vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
417 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
418 rc = VPORT_OK;
419 goto out;
420 }
421
422 if ((phba->link_state < LPFC_LINK_UP) ||
423 (pport->port_state < LPFC_FABRIC_CFG_LINK) ||
424 (phba->fc_topology == LPFC_TOPOLOGY_LOOP)) {
425 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
426 rc = VPORT_OK;
427 goto out;
428 }
429
430 if (disable) {
431 lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
432 rc = VPORT_OK;
433 goto out;
434 }
435
436 /* Use the Physical nodes Fabric NDLP to determine if the link is
437 * up and ready to FDISC.
438 */
439 ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
440 if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
441 ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
442 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
443 lpfc_set_disctmo(vport);
444 lpfc_initial_fdisc(vport);
445 } else {
446 lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
447 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
448 "0262 No NPIV Fabric support\n");
449 }
450 } else {
451 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
452 }
453 rc = VPORT_OK;
454
455 out:
456 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
457 "1825 Vport Created.\n");
458 lpfc_host_attrib_init(lpfc_shost_from_vport(vport));
459 error_out:
460 return rc;
461 }
462
463 static int
disable_vport(struct fc_vport * fc_vport)464 disable_vport(struct fc_vport *fc_vport)
465 {
466 struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
467 struct lpfc_hba *phba = vport->phba;
468 struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
469 long timeout;
470 struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
471
472 ndlp = lpfc_findnode_did(vport, Fabric_DID);
473 if (ndlp && NLP_CHK_NODE_ACT(ndlp)
474 && phba->link_state >= LPFC_LINK_UP) {
475 vport->unreg_vpi_cmpl = VPORT_INVAL;
476 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
477 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
478 while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
479 timeout = schedule_timeout(timeout);
480 }
481
482 lpfc_sli_host_down(vport);
483
484 /* Mark all nodes for discovery so we can remove them by
485 * calling lpfc_cleanup_rpis(vport, 1)
486 */
487 list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
488 if (!NLP_CHK_NODE_ACT(ndlp))
489 continue;
490 if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
491 continue;
492 lpfc_disc_state_machine(vport, ndlp, NULL,
493 NLP_EVT_DEVICE_RECOVERY);
494 }
495 lpfc_cleanup_rpis(vport, 1);
496
497 lpfc_stop_vport_timers(vport);
498 lpfc_unreg_all_rpis(vport);
499 lpfc_unreg_default_rpis(vport);
500 /*
501 * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi) does the
502 * scsi_host_put() to release the vport.
503 */
504 lpfc_mbx_unreg_vpi(vport);
505 spin_lock_irq(shost->host_lock);
506 vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
507 spin_unlock_irq(shost->host_lock);
508
509 lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
510 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
511 "1826 Vport Disabled.\n");
512 return VPORT_OK;
513 }
514
515 static int
enable_vport(struct fc_vport * fc_vport)516 enable_vport(struct fc_vport *fc_vport)
517 {
518 struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
519 struct lpfc_hba *phba = vport->phba;
520 struct lpfc_nodelist *ndlp = NULL;
521 struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
522
523 if ((phba->link_state < LPFC_LINK_UP) ||
524 (phba->fc_topology == LPFC_TOPOLOGY_LOOP)) {
525 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
526 return VPORT_OK;
527 }
528
529 spin_lock_irq(shost->host_lock);
530 vport->load_flag |= FC_LOADING;
531 if (vport->fc_flag & FC_VPORT_NEEDS_INIT_VPI) {
532 spin_unlock_irq(shost->host_lock);
533 lpfc_issue_init_vpi(vport);
534 goto out;
535 }
536
537 vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
538 spin_unlock_irq(shost->host_lock);
539
540 /* Use the Physical nodes Fabric NDLP to determine if the link is
541 * up and ready to FDISC.
542 */
543 ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
544 if (ndlp && NLP_CHK_NODE_ACT(ndlp)
545 && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
546 if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
547 lpfc_set_disctmo(vport);
548 lpfc_initial_fdisc(vport);
549 } else {
550 lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
551 lpfc_printf_vlog(vport, KERN_ERR, LOG_ELS,
552 "0264 No NPIV Fabric support\n");
553 }
554 } else {
555 lpfc_vport_set_state(vport, FC_VPORT_FAILED);
556 }
557
558 out:
559 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
560 "1827 Vport Enabled.\n");
561 return VPORT_OK;
562 }
563
564 int
lpfc_vport_disable(struct fc_vport * fc_vport,bool disable)565 lpfc_vport_disable(struct fc_vport *fc_vport, bool disable)
566 {
567 if (disable)
568 return disable_vport(fc_vport);
569 else
570 return enable_vport(fc_vport);
571 }
572
573
574 int
lpfc_vport_delete(struct fc_vport * fc_vport)575 lpfc_vport_delete(struct fc_vport *fc_vport)
576 {
577 struct lpfc_nodelist *ndlp = NULL;
578 struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
579 struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
580 struct lpfc_hba *phba = vport->phba;
581 long timeout;
582 bool ns_ndlp_referenced = false;
583
584 if (vport->port_type == LPFC_PHYSICAL_PORT) {
585 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
586 "1812 vport_delete failed: Cannot delete "
587 "physical host\n");
588 return VPORT_ERROR;
589 }
590
591 /* If the vport is a static vport fail the deletion. */
592 if ((vport->vport_flag & STATIC_VPORT) &&
593 !(phba->pport->load_flag & FC_UNLOADING)) {
594 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
595 "1837 vport_delete failed: Cannot delete "
596 "static vport.\n");
597 return VPORT_ERROR;
598 }
599 spin_lock_irq(&phba->hbalock);
600 vport->load_flag |= FC_UNLOADING;
601 spin_unlock_irq(&phba->hbalock);
602 /*
603 * If we are not unloading the driver then prevent the vport_delete
604 * from happening until after this vport's discovery is finished.
605 */
606 if (!(phba->pport->load_flag & FC_UNLOADING)) {
607 int check_count = 0;
608 while (check_count < ((phba->fc_ratov * 3) + 3) &&
609 vport->port_state > LPFC_VPORT_FAILED &&
610 vport->port_state < LPFC_VPORT_READY) {
611 check_count++;
612 msleep(1000);
613 }
614 if (vport->port_state > LPFC_VPORT_FAILED &&
615 vport->port_state < LPFC_VPORT_READY)
616 return -EAGAIN;
617 }
618
619 /*
620 * Take early refcount for outstanding I/O requests we schedule during
621 * delete processing for unreg_vpi. Always keep this before
622 * scsi_remove_host() as we can no longer obtain a reference through
623 * scsi_host_get() after scsi_host_remove as shost is set to SHOST_DEL.
624 */
625 if (!scsi_host_get(shost))
626 return VPORT_INVAL;
627
628 lpfc_free_sysfs_attr(vport);
629
630 lpfc_debugfs_terminate(vport);
631
632 /*
633 * The call to fc_remove_host might release the NameServer ndlp. Since
634 * we might need to use the ndlp to send the DA_ID CT command,
635 * increment the reference for the NameServer ndlp to prevent it from
636 * being released.
637 */
638 ndlp = lpfc_findnode_did(vport, NameServer_DID);
639 if (ndlp && NLP_CHK_NODE_ACT(ndlp)) {
640 lpfc_nlp_get(ndlp);
641 ns_ndlp_referenced = true;
642 }
643
644 /* Remove FC host and then SCSI host with the vport */
645 fc_remove_host(shost);
646 scsi_remove_host(shost);
647
648 ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
649
650 /* In case of driver unload, we shall not perform fabric logo as the
651 * worker thread already stopped at this stage and, in this case, we
652 * can safely skip the fabric logo.
653 */
654 if (phba->pport->load_flag & FC_UNLOADING) {
655 if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
656 ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
657 phba->link_state >= LPFC_LINK_UP) {
658 /* First look for the Fabric ndlp */
659 ndlp = lpfc_findnode_did(vport, Fabric_DID);
660 if (!ndlp)
661 goto skip_logo;
662 else if (!NLP_CHK_NODE_ACT(ndlp)) {
663 ndlp = lpfc_enable_node(vport, ndlp,
664 NLP_STE_UNUSED_NODE);
665 if (!ndlp)
666 goto skip_logo;
667 }
668 /* Remove ndlp from vport npld list */
669 lpfc_dequeue_node(vport, ndlp);
670
671 /* Indicate free memory when release */
672 spin_lock_irq(&phba->ndlp_lock);
673 NLP_SET_FREE_REQ(ndlp);
674 spin_unlock_irq(&phba->ndlp_lock);
675 /* Kick off release ndlp when it can be safely done */
676 lpfc_nlp_put(ndlp);
677 }
678 goto skip_logo;
679 }
680
681 /* Otherwise, we will perform fabric logo as needed */
682 if (ndlp && NLP_CHK_NODE_ACT(ndlp) &&
683 ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
684 phba->link_state >= LPFC_LINK_UP &&
685 phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
686 if (vport->cfg_enable_da_id) {
687 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
688 if (!lpfc_ns_cmd(vport, SLI_CTNS_DA_ID, 0, 0))
689 while (vport->ct_flags && timeout)
690 timeout = schedule_timeout(timeout);
691 else
692 lpfc_printf_log(vport->phba, KERN_WARNING,
693 LOG_VPORT,
694 "1829 CT command failed to "
695 "delete objects on fabric\n");
696 }
697 /* First look for the Fabric ndlp */
698 ndlp = lpfc_findnode_did(vport, Fabric_DID);
699 if (!ndlp) {
700 /* Cannot find existing Fabric ndlp, allocate one */
701 ndlp = mempool_alloc(phba->nlp_mem_pool, GFP_KERNEL);
702 if (!ndlp)
703 goto skip_logo;
704 lpfc_nlp_init(vport, ndlp, Fabric_DID);
705 /* Indicate free memory when release */
706 NLP_SET_FREE_REQ(ndlp);
707 } else {
708 if (!NLP_CHK_NODE_ACT(ndlp)) {
709 ndlp = lpfc_enable_node(vport, ndlp,
710 NLP_STE_UNUSED_NODE);
711 if (!ndlp)
712 goto skip_logo;
713 }
714
715 /* Remove ndlp from vport list */
716 lpfc_dequeue_node(vport, ndlp);
717 spin_lock_irq(&phba->ndlp_lock);
718 if (!NLP_CHK_FREE_REQ(ndlp))
719 /* Indicate free memory when release */
720 NLP_SET_FREE_REQ(ndlp);
721 else {
722 /* Skip this if ndlp is already in free mode */
723 spin_unlock_irq(&phba->ndlp_lock);
724 goto skip_logo;
725 }
726 spin_unlock_irq(&phba->ndlp_lock);
727 }
728
729 /*
730 * If the vpi is not registered, then a valid FDISC doesn't
731 * exist and there is no need for a ELS LOGO. Just cleanup
732 * the ndlp.
733 */
734 if (!(vport->vpi_state & LPFC_VPI_REGISTERED)) {
735 lpfc_nlp_put(ndlp);
736 goto skip_logo;
737 }
738
739 vport->unreg_vpi_cmpl = VPORT_INVAL;
740 timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
741 if (!lpfc_issue_els_npiv_logo(vport, ndlp))
742 while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
743 timeout = schedule_timeout(timeout);
744 }
745
746 if (!(phba->pport->load_flag & FC_UNLOADING))
747 lpfc_discovery_wait(vport);
748
749 skip_logo:
750
751 /*
752 * If the NameServer ndlp has been incremented to allow the DA_ID CT
753 * command to be sent, decrement the ndlp now.
754 */
755 if (ns_ndlp_referenced) {
756 ndlp = lpfc_findnode_did(vport, NameServer_DID);
757 lpfc_nlp_put(ndlp);
758 }
759
760 lpfc_cleanup(vport);
761 lpfc_sli_host_down(vport);
762
763 lpfc_stop_vport_timers(vport);
764
765 if (!(phba->pport->load_flag & FC_UNLOADING)) {
766 lpfc_unreg_all_rpis(vport);
767 lpfc_unreg_default_rpis(vport);
768 /*
769 * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi)
770 * does the scsi_host_put() to release the vport.
771 */
772 if (!(vport->vpi_state & LPFC_VPI_REGISTERED) ||
773 lpfc_mbx_unreg_vpi(vport))
774 scsi_host_put(shost);
775 } else {
776 scsi_host_put(shost);
777 }
778
779 lpfc_free_vpi(phba, vport->vpi);
780 vport->work_port_events = 0;
781 spin_lock_irq(&phba->hbalock);
782 list_del_init(&vport->listentry);
783 spin_unlock_irq(&phba->hbalock);
784 lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
785 "1828 Vport Deleted.\n");
786 scsi_host_put(shost);
787 return VPORT_OK;
788 }
789
790 struct lpfc_vport **
lpfc_create_vport_work_array(struct lpfc_hba * phba)791 lpfc_create_vport_work_array(struct lpfc_hba *phba)
792 {
793 struct lpfc_vport *port_iterator;
794 struct lpfc_vport **vports;
795 int index = 0;
796 vports = kzalloc((phba->max_vports + 1) * sizeof(struct lpfc_vport *),
797 GFP_KERNEL);
798 if (vports == NULL)
799 return NULL;
800 spin_lock_irq(&phba->hbalock);
801 list_for_each_entry(port_iterator, &phba->port_list, listentry) {
802 if (port_iterator->load_flag & FC_UNLOADING)
803 continue;
804 if (!scsi_host_get(lpfc_shost_from_vport(port_iterator))) {
805 lpfc_printf_vlog(port_iterator, KERN_ERR, LOG_VPORT,
806 "1801 Create vport work array FAILED: "
807 "cannot do scsi_host_get\n");
808 continue;
809 }
810 vports[index++] = port_iterator;
811 }
812 spin_unlock_irq(&phba->hbalock);
813 return vports;
814 }
815
816 void
lpfc_destroy_vport_work_array(struct lpfc_hba * phba,struct lpfc_vport ** vports)817 lpfc_destroy_vport_work_array(struct lpfc_hba *phba, struct lpfc_vport **vports)
818 {
819 int i;
820 if (vports == NULL)
821 return;
822 for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++)
823 scsi_host_put(lpfc_shost_from_vport(vports[i]));
824 kfree(vports);
825 }
826
827
828 /**
829 * lpfc_vport_reset_stat_data - Reset the statistical data for the vport
830 * @vport: Pointer to vport object.
831 *
832 * This function resets the statistical data for the vport. This function
833 * is called with the host_lock held
834 **/
835 void
lpfc_vport_reset_stat_data(struct lpfc_vport * vport)836 lpfc_vport_reset_stat_data(struct lpfc_vport *vport)
837 {
838 struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
839
840 list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
841 if (!NLP_CHK_NODE_ACT(ndlp))
842 continue;
843 if (ndlp->lat_data)
844 memset(ndlp->lat_data, 0, LPFC_MAX_BUCKET_COUNT *
845 sizeof(struct lpfc_scsicmd_bkt));
846 }
847 }
848
849
850 /**
851 * lpfc_alloc_bucket - Allocate data buffer required for statistical data
852 * @vport: Pointer to vport object.
853 *
854 * This function allocates data buffer required for all the FC
855 * nodes of the vport to collect statistical data.
856 **/
857 void
lpfc_alloc_bucket(struct lpfc_vport * vport)858 lpfc_alloc_bucket(struct lpfc_vport *vport)
859 {
860 struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
861
862 list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
863 if (!NLP_CHK_NODE_ACT(ndlp))
864 continue;
865
866 kfree(ndlp->lat_data);
867 ndlp->lat_data = NULL;
868
869 if (ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
870 ndlp->lat_data = kcalloc(LPFC_MAX_BUCKET_COUNT,
871 sizeof(struct lpfc_scsicmd_bkt),
872 GFP_ATOMIC);
873
874 if (!ndlp->lat_data)
875 lpfc_printf_vlog(vport, KERN_ERR, LOG_NODE,
876 "0287 lpfc_alloc_bucket failed to "
877 "allocate statistical data buffer DID "
878 "0x%x\n", ndlp->nlp_DID);
879 }
880 }
881 }
882
883 /**
884 * lpfc_free_bucket - Free data buffer required for statistical data
885 * @vport: Pointer to vport object.
886 *
887 * Th function frees statistical data buffer of all the FC
888 * nodes of the vport.
889 **/
890 void
lpfc_free_bucket(struct lpfc_vport * vport)891 lpfc_free_bucket(struct lpfc_vport *vport)
892 {
893 struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
894
895 list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
896 if (!NLP_CHK_NODE_ACT(ndlp))
897 continue;
898
899 kfree(ndlp->lat_data);
900 ndlp->lat_data = NULL;
901 }
902 }
903