1 /*******************************************************************
2  * This file is part of the Emulex Linux Device Driver for         *
3  * Fibre Channel Host Bus Adapters.                                *
4  * Copyright (C) 2017-2021 Broadcom. All Rights Reserved. The term *
5  * “Broadcom” refers to Broadcom Inc. and/or its subsidiaries.     *
6  * Copyright (C) 2004-2016 Emulex.  All rights reserved.           *
7  * EMULEX and SLI are trademarks of Emulex.                        *
8  * www.broadcom.com                                                *
9  * Portions Copyright (C) 2004-2005 Christoph Hellwig              *
10  *                                                                 *
11  * This program is free software; you can redistribute it and/or   *
12  * modify it under the terms of version 2 of the GNU General       *
13  * Public License as published by the Free Software Foundation.    *
14  * This program is distributed in the hope that it will be useful. *
15  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
16  * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
17  * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
18  * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
19  * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
20  * more details, a copy of which can be found in the file COPYING  *
21  * included with this package.                                     *
22  *******************************************************************/
23 
24 #include <linux/blkdev.h>
25 #include <linux/delay.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/idr.h>
28 #include <linux/interrupt.h>
29 #include <linux/kthread.h>
30 #include <linux/pci.h>
31 #include <linux/slab.h>
32 #include <linux/spinlock.h>
33 #include <linux/sched/signal.h>
34 
35 #include <scsi/scsi.h>
36 #include <scsi/scsi_device.h>
37 #include <scsi/scsi_host.h>
38 #include <scsi/scsi_transport_fc.h>
39 
40 #include "lpfc_hw4.h"
41 #include "lpfc_hw.h"
42 #include "lpfc_sli.h"
43 #include "lpfc_sli4.h"
44 #include "lpfc_nl.h"
45 #include "lpfc_disc.h"
46 #include "lpfc_scsi.h"
47 #include "lpfc.h"
48 #include "lpfc_logmsg.h"
49 #include "lpfc_crtn.h"
50 #include "lpfc_version.h"
51 #include "lpfc_vport.h"
52 
lpfc_vport_set_state(struct lpfc_vport * vport,enum fc_vport_state new_state)53 inline void lpfc_vport_set_state(struct lpfc_vport *vport,
54 				 enum fc_vport_state new_state)
55 {
56 	struct fc_vport *fc_vport = vport->fc_vport;
57 
58 	if (fc_vport) {
59 		/*
60 		 * When the transport defines fc_vport_set state we will replace
61 		 * this code with the following line
62 		 */
63 		/* fc_vport_set_state(fc_vport, new_state); */
64 		if (new_state != FC_VPORT_INITIALIZING)
65 			fc_vport->vport_last_state = fc_vport->vport_state;
66 		fc_vport->vport_state = new_state;
67 	}
68 
69 	/* for all the error states we will set the invternal state to FAILED */
70 	switch (new_state) {
71 	case FC_VPORT_NO_FABRIC_SUPP:
72 	case FC_VPORT_NO_FABRIC_RSCS:
73 	case FC_VPORT_FABRIC_LOGOUT:
74 	case FC_VPORT_FABRIC_REJ_WWN:
75 	case FC_VPORT_FAILED:
76 		vport->port_state = LPFC_VPORT_FAILED;
77 		break;
78 	case FC_VPORT_LINKDOWN:
79 		vport->port_state = LPFC_VPORT_UNKNOWN;
80 		break;
81 	default:
82 		/* do nothing */
83 		break;
84 	}
85 }
86 
87 int
lpfc_alloc_vpi(struct lpfc_hba * phba)88 lpfc_alloc_vpi(struct lpfc_hba *phba)
89 {
90 	unsigned long vpi;
91 
92 	spin_lock_irq(&phba->hbalock);
93 	/* Start at bit 1 because vpi zero is reserved for the physical port */
94 	vpi = find_next_zero_bit(phba->vpi_bmask, (phba->max_vpi + 1), 1);
95 	if (vpi > phba->max_vpi)
96 		vpi = 0;
97 	else
98 		set_bit(vpi, phba->vpi_bmask);
99 	if (phba->sli_rev == LPFC_SLI_REV4)
100 		phba->sli4_hba.max_cfg_param.vpi_used++;
101 	spin_unlock_irq(&phba->hbalock);
102 	return vpi;
103 }
104 
105 static void
lpfc_free_vpi(struct lpfc_hba * phba,int vpi)106 lpfc_free_vpi(struct lpfc_hba *phba, int vpi)
107 {
108 	if (vpi == 0)
109 		return;
110 	spin_lock_irq(&phba->hbalock);
111 	clear_bit(vpi, phba->vpi_bmask);
112 	if (phba->sli_rev == LPFC_SLI_REV4)
113 		phba->sli4_hba.max_cfg_param.vpi_used--;
114 	spin_unlock_irq(&phba->hbalock);
115 }
116 
117 static int
lpfc_vport_sparm(struct lpfc_hba * phba,struct lpfc_vport * vport)118 lpfc_vport_sparm(struct lpfc_hba *phba, struct lpfc_vport *vport)
119 {
120 	LPFC_MBOXQ_t *pmb;
121 	MAILBOX_t *mb;
122 	struct lpfc_dmabuf *mp;
123 	int  rc;
124 
125 	pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
126 	if (!pmb) {
127 		return -ENOMEM;
128 	}
129 	mb = &pmb->u.mb;
130 
131 	rc = lpfc_read_sparam(phba, pmb, vport->vpi);
132 	if (rc) {
133 		mempool_free(pmb, phba->mbox_mem_pool);
134 		return -ENOMEM;
135 	}
136 
137 	/*
138 	 * Grab buffer pointer and clear context1 so we can use
139 	 * lpfc_sli_issue_box_wait
140 	 */
141 	mp = (struct lpfc_dmabuf *)pmb->ctx_buf;
142 	pmb->ctx_buf = NULL;
143 
144 	pmb->vport = vport;
145 	rc = lpfc_sli_issue_mbox_wait(phba, pmb, phba->fc_ratov * 2);
146 	if (rc != MBX_SUCCESS) {
147 		if (signal_pending(current)) {
148 			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
149 					 "1830 Signal aborted mbxCmd x%x\n",
150 					 mb->mbxCommand);
151 			lpfc_mbuf_free(phba, mp->virt, mp->phys);
152 			kfree(mp);
153 			if (rc != MBX_TIMEOUT)
154 				mempool_free(pmb, phba->mbox_mem_pool);
155 			return -EINTR;
156 		} else {
157 			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
158 					 "1818 VPort failed init, mbxCmd x%x "
159 					 "READ_SPARM mbxStatus x%x, rc = x%x\n",
160 					 mb->mbxCommand, mb->mbxStatus, rc);
161 			lpfc_mbuf_free(phba, mp->virt, mp->phys);
162 			kfree(mp);
163 			if (rc != MBX_TIMEOUT)
164 				mempool_free(pmb, phba->mbox_mem_pool);
165 			return -EIO;
166 		}
167 	}
168 
169 	memcpy(&vport->fc_sparam, mp->virt, sizeof (struct serv_parm));
170 	memcpy(&vport->fc_nodename, &vport->fc_sparam.nodeName,
171 	       sizeof (struct lpfc_name));
172 	memcpy(&vport->fc_portname, &vport->fc_sparam.portName,
173 	       sizeof (struct lpfc_name));
174 
175 	lpfc_mbuf_free(phba, mp->virt, mp->phys);
176 	kfree(mp);
177 	mempool_free(pmb, phba->mbox_mem_pool);
178 
179 	return 0;
180 }
181 
182 static int
lpfc_valid_wwn_format(struct lpfc_hba * phba,struct lpfc_name * wwn,const char * name_type)183 lpfc_valid_wwn_format(struct lpfc_hba *phba, struct lpfc_name *wwn,
184 		      const char *name_type)
185 {
186 				/* ensure that IEEE format 1 addresses
187 				 * contain zeros in bits 59-48
188 				 */
189 	if (!((wwn->u.wwn[0] >> 4) == 1 &&
190 	      ((wwn->u.wwn[0] & 0xf) != 0 || (wwn->u.wwn[1] & 0xf) != 0)))
191 		return 1;
192 
193 	lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
194 			"1822 Invalid %s: %02x:%02x:%02x:%02x:"
195 			"%02x:%02x:%02x:%02x\n",
196 			name_type,
197 			wwn->u.wwn[0], wwn->u.wwn[1],
198 			wwn->u.wwn[2], wwn->u.wwn[3],
199 			wwn->u.wwn[4], wwn->u.wwn[5],
200 			wwn->u.wwn[6], wwn->u.wwn[7]);
201 	return 0;
202 }
203 
204 static int
lpfc_unique_wwpn(struct lpfc_hba * phba,struct lpfc_vport * new_vport)205 lpfc_unique_wwpn(struct lpfc_hba *phba, struct lpfc_vport *new_vport)
206 {
207 	struct lpfc_vport *vport;
208 	unsigned long flags;
209 
210 	spin_lock_irqsave(&phba->port_list_lock, flags);
211 	list_for_each_entry(vport, &phba->port_list, listentry) {
212 		if (vport == new_vport)
213 			continue;
214 		/* If they match, return not unique */
215 		if (memcmp(&vport->fc_sparam.portName,
216 			   &new_vport->fc_sparam.portName,
217 			   sizeof(struct lpfc_name)) == 0) {
218 			spin_unlock_irqrestore(&phba->port_list_lock, flags);
219 			return 0;
220 		}
221 	}
222 	spin_unlock_irqrestore(&phba->port_list_lock, flags);
223 	return 1;
224 }
225 
226 /**
227  * lpfc_discovery_wait - Wait for driver discovery to quiesce
228  * @vport: The virtual port for which this call is being executed.
229  *
230  * This driver calls this routine specifically from lpfc_vport_delete
231  * to enforce a synchronous execution of vport
232  * delete relative to discovery activities.  The
233  * lpfc_vport_delete routine should not return until it
234  * can reasonably guarantee that discovery has quiesced.
235  * Post FDISC LOGO, the driver must wait until its SAN teardown is
236  * complete and all resources recovered before allowing
237  * cleanup.
238  *
239  * This routine does not require any locks held.
240  **/
lpfc_discovery_wait(struct lpfc_vport * vport)241 static void lpfc_discovery_wait(struct lpfc_vport *vport)
242 {
243 	struct lpfc_hba *phba = vport->phba;
244 	uint32_t wait_flags = 0;
245 	unsigned long wait_time_max;
246 	unsigned long start_time;
247 
248 	wait_flags = FC_RSCN_MODE | FC_RSCN_DISCOVERY | FC_NLP_MORE |
249 		     FC_RSCN_DEFERRED | FC_NDISC_ACTIVE | FC_DISC_TMO;
250 
251 	/*
252 	 * The time constraint on this loop is a balance between the
253 	 * fabric RA_TOV value and dev_loss tmo.  The driver's
254 	 * devloss_tmo is 10 giving this loop a 3x multiplier minimally.
255 	 */
256 	wait_time_max = msecs_to_jiffies(((phba->fc_ratov * 3) + 3) * 1000);
257 	wait_time_max += jiffies;
258 	start_time = jiffies;
259 	while (time_before(jiffies, wait_time_max)) {
260 		if ((vport->num_disc_nodes > 0)    ||
261 		    (vport->fc_flag & wait_flags)  ||
262 		    ((vport->port_state > LPFC_VPORT_FAILED) &&
263 		     (vport->port_state < LPFC_VPORT_READY))) {
264 			lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
265 					"1833 Vport discovery quiesce Wait:"
266 					" state x%x fc_flags x%x"
267 					" num_nodes x%x, waiting 1000 msecs"
268 					" total wait msecs x%x\n",
269 					vport->port_state, vport->fc_flag,
270 					vport->num_disc_nodes,
271 					jiffies_to_msecs(jiffies - start_time));
272 			msleep(1000);
273 		} else {
274 			/* Base case.  Wait variants satisfied.  Break out */
275 			lpfc_printf_vlog(vport, KERN_INFO, LOG_VPORT,
276 					 "1834 Vport discovery quiesced:"
277 					 " state x%x fc_flags x%x"
278 					 " wait msecs x%x\n",
279 					 vport->port_state, vport->fc_flag,
280 					 jiffies_to_msecs(jiffies
281 						- start_time));
282 			break;
283 		}
284 	}
285 
286 	if (time_after(jiffies, wait_time_max))
287 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
288 				 "1835 Vport discovery quiesce failed:"
289 				 " state x%x fc_flags x%x wait msecs x%x\n",
290 				 vport->port_state, vport->fc_flag,
291 				 jiffies_to_msecs(jiffies - start_time));
292 }
293 
294 int
lpfc_vport_create(struct fc_vport * fc_vport,bool disable)295 lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
296 {
297 	struct lpfc_nodelist *ndlp;
298 	struct Scsi_Host *shost = fc_vport->shost;
299 	struct lpfc_vport *pport = (struct lpfc_vport *) shost->hostdata;
300 	struct lpfc_hba   *phba = pport->phba;
301 	struct lpfc_vport *vport = NULL;
302 	int instance;
303 	int vpi;
304 	int rc = VPORT_ERROR;
305 	int status;
306 
307 	if ((phba->sli_rev < 3) || !(phba->cfg_enable_npiv)) {
308 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
309 				"1808 Create VPORT failed: "
310 				"NPIV is not enabled: SLImode:%d\n",
311 				phba->sli_rev);
312 		rc = VPORT_INVAL;
313 		goto error_out;
314 	}
315 
316 	/* NPIV is not supported if HBA has NVME Target enabled */
317 	if (phba->nvmet_support) {
318 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
319 				"3189 Create VPORT failed: "
320 				"NPIV is not supported on NVME Target\n");
321 		rc = VPORT_INVAL;
322 		goto error_out;
323 	}
324 
325 	vpi = lpfc_alloc_vpi(phba);
326 	if (vpi == 0) {
327 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
328 				"1809 Create VPORT failed: "
329 				"Max VPORTs (%d) exceeded\n",
330 				phba->max_vpi);
331 		rc = VPORT_NORESOURCES;
332 		goto error_out;
333 	}
334 
335 	/* Assign an unused board number */
336 	if ((instance = lpfc_get_instance()) < 0) {
337 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
338 				"1810 Create VPORT failed: Cannot get "
339 				"instance number\n");
340 		lpfc_free_vpi(phba, vpi);
341 		rc = VPORT_NORESOURCES;
342 		goto error_out;
343 	}
344 
345 	vport = lpfc_create_port(phba, instance, &fc_vport->dev);
346 	if (!vport) {
347 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
348 				"1811 Create VPORT failed: vpi x%x\n", vpi);
349 		lpfc_free_vpi(phba, vpi);
350 		rc = VPORT_NORESOURCES;
351 		goto error_out;
352 	}
353 
354 	vport->vpi = vpi;
355 	lpfc_debugfs_initialize(vport);
356 
357 	if ((status = lpfc_vport_sparm(phba, vport))) {
358 		if (status == -EINTR) {
359 			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
360 					 "1831 Create VPORT Interrupted.\n");
361 			rc = VPORT_ERROR;
362 		} else {
363 			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
364 					 "1813 Create VPORT failed. "
365 					 "Cannot get sparam\n");
366 			rc = VPORT_NORESOURCES;
367 		}
368 		lpfc_free_vpi(phba, vpi);
369 		destroy_port(vport);
370 		goto error_out;
371 	}
372 
373 	u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
374 	u64_to_wwn(fc_vport->port_name, vport->fc_portname.u.wwn);
375 
376 	memcpy(&vport->fc_sparam.portName, vport->fc_portname.u.wwn, 8);
377 	memcpy(&vport->fc_sparam.nodeName, vport->fc_nodename.u.wwn, 8);
378 
379 	if (!lpfc_valid_wwn_format(phba, &vport->fc_sparam.nodeName, "WWNN") ||
380 	    !lpfc_valid_wwn_format(phba, &vport->fc_sparam.portName, "WWPN")) {
381 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
382 				 "1821 Create VPORT failed. "
383 				 "Invalid WWN format\n");
384 		lpfc_free_vpi(phba, vpi);
385 		destroy_port(vport);
386 		rc = VPORT_INVAL;
387 		goto error_out;
388 	}
389 
390 	if (!lpfc_unique_wwpn(phba, vport)) {
391 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
392 				 "1823 Create VPORT failed. "
393 				 "Duplicate WWN on HBA\n");
394 		lpfc_free_vpi(phba, vpi);
395 		destroy_port(vport);
396 		rc = VPORT_INVAL;
397 		goto error_out;
398 	}
399 
400 	/* Create binary sysfs attribute for vport */
401 	lpfc_alloc_sysfs_attr(vport);
402 
403 	/* Set the DFT_LUN_Q_DEPTH accordingly */
404 	vport->cfg_lun_queue_depth  = phba->pport->cfg_lun_queue_depth;
405 
406 	/* Only the physical port can support NVME for now */
407 	vport->cfg_enable_fc4_type = LPFC_ENABLE_FCP;
408 
409 	*(struct lpfc_vport **)fc_vport->dd_data = vport;
410 	vport->fc_vport = fc_vport;
411 
412 	/* At this point we are fully registered with SCSI Layer.  */
413 	vport->load_flag |= FC_ALLOW_FDMI;
414 	if (phba->cfg_enable_SmartSAN ||
415 	    (phba->cfg_fdmi_on == LPFC_FDMI_SUPPORT)) {
416 		/* Setup appropriate attribute masks */
417 		vport->fdmi_hba_mask = phba->pport->fdmi_hba_mask;
418 		vport->fdmi_port_mask = phba->pport->fdmi_port_mask;
419 	}
420 
421 	/*
422 	 * In SLI4, the vpi must be activated before it can be used
423 	 * by the port.
424 	 */
425 	if ((phba->sli_rev == LPFC_SLI_REV4) &&
426 	    (pport->fc_flag & FC_VFI_REGISTERED)) {
427 		rc = lpfc_sli4_init_vpi(vport);
428 		if (rc) {
429 			lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
430 					"1838 Failed to INIT_VPI on vpi %d "
431 					"status %d\n", vpi, rc);
432 			rc = VPORT_NORESOURCES;
433 			lpfc_free_vpi(phba, vpi);
434 			goto error_out;
435 		}
436 	} else if (phba->sli_rev == LPFC_SLI_REV4) {
437 		/*
438 		 * Driver cannot INIT_VPI now. Set the flags to
439 		 * init_vpi when reg_vfi complete.
440 		 */
441 		vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
442 		lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
443 		rc = VPORT_OK;
444 		goto out;
445 	}
446 
447 	if ((phba->link_state < LPFC_LINK_UP) ||
448 	    (pport->port_state < LPFC_FABRIC_CFG_LINK) ||
449 	    (phba->fc_topology == LPFC_TOPOLOGY_LOOP)) {
450 		lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
451 		rc = VPORT_OK;
452 		goto out;
453 	}
454 
455 	if (disable) {
456 		lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
457 		rc = VPORT_OK;
458 		goto out;
459 	}
460 
461 	/* Use the Physical nodes Fabric NDLP to determine if the link is
462 	 * up and ready to FDISC.
463 	 */
464 	ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
465 	if (ndlp &&
466 	    ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
467 		if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
468 			lpfc_set_disctmo(vport);
469 			lpfc_initial_fdisc(vport);
470 		} else {
471 			lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
472 			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
473 					 "0262 No NPIV Fabric support\n");
474 		}
475 	} else {
476 		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
477 	}
478 	rc = VPORT_OK;
479 
480 out:
481 	lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
482 			 "1825 Vport Created.\n");
483 	lpfc_host_attrib_init(lpfc_shost_from_vport(vport));
484 error_out:
485 	return rc;
486 }
487 
488 static int
disable_vport(struct fc_vport * fc_vport)489 disable_vport(struct fc_vport *fc_vport)
490 {
491 	struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
492 	struct lpfc_hba   *phba = vport->phba;
493 	struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
494 	long timeout;
495 	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
496 
497 	ndlp = lpfc_findnode_did(vport, Fabric_DID);
498 	if (ndlp && phba->link_state >= LPFC_LINK_UP) {
499 		vport->unreg_vpi_cmpl = VPORT_INVAL;
500 		timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
501 		if (!lpfc_issue_els_npiv_logo(vport, ndlp))
502 			while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
503 				timeout = schedule_timeout(timeout);
504 	}
505 
506 	lpfc_sli_host_down(vport);
507 
508 	/* Mark all nodes for discovery so we can remove them by
509 	 * calling lpfc_cleanup_rpis(vport, 1)
510 	 */
511 	list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
512 		if (ndlp->nlp_state == NLP_STE_UNUSED_NODE)
513 			continue;
514 		lpfc_disc_state_machine(vport, ndlp, NULL,
515 					NLP_EVT_DEVICE_RECOVERY);
516 	}
517 	lpfc_cleanup_rpis(vport, 1);
518 
519 	lpfc_stop_vport_timers(vport);
520 	lpfc_unreg_all_rpis(vport);
521 	lpfc_unreg_default_rpis(vport);
522 	/*
523 	 * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi) does the
524 	 * scsi_host_put() to release the vport.
525 	 */
526 	lpfc_mbx_unreg_vpi(vport);
527 	if (phba->sli_rev == LPFC_SLI_REV4) {
528 		spin_lock_irq(shost->host_lock);
529 		vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
530 		spin_unlock_irq(shost->host_lock);
531 	}
532 
533 	lpfc_vport_set_state(vport, FC_VPORT_DISABLED);
534 	lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
535 			 "1826 Vport Disabled.\n");
536 	return VPORT_OK;
537 }
538 
539 static int
enable_vport(struct fc_vport * fc_vport)540 enable_vport(struct fc_vport *fc_vport)
541 {
542 	struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
543 	struct lpfc_hba   *phba = vport->phba;
544 	struct lpfc_nodelist *ndlp = NULL;
545 	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
546 
547 	if ((phba->link_state < LPFC_LINK_UP) ||
548 	    (phba->fc_topology == LPFC_TOPOLOGY_LOOP)) {
549 		lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
550 		return VPORT_OK;
551 	}
552 
553 	spin_lock_irq(shost->host_lock);
554 	vport->load_flag |= FC_LOADING;
555 	if (vport->fc_flag & FC_VPORT_NEEDS_INIT_VPI) {
556 		spin_unlock_irq(shost->host_lock);
557 		lpfc_issue_init_vpi(vport);
558 		goto out;
559 	}
560 
561 	vport->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
562 	spin_unlock_irq(shost->host_lock);
563 
564 	/* Use the Physical nodes Fabric NDLP to determine if the link is
565 	 * up and ready to FDISC.
566 	 */
567 	ndlp = lpfc_findnode_did(phba->pport, Fabric_DID);
568 	if (ndlp && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE) {
569 		if (phba->link_flag & LS_NPIV_FAB_SUPPORTED) {
570 			lpfc_set_disctmo(vport);
571 			lpfc_initial_fdisc(vport);
572 		} else {
573 			lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
574 			lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
575 					 "0264 No NPIV Fabric support\n");
576 		}
577 	} else {
578 		lpfc_vport_set_state(vport, FC_VPORT_FAILED);
579 	}
580 
581 out:
582 	lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
583 			 "1827 Vport Enabled.\n");
584 	return VPORT_OK;
585 }
586 
587 int
lpfc_vport_disable(struct fc_vport * fc_vport,bool disable)588 lpfc_vport_disable(struct fc_vport *fc_vport, bool disable)
589 {
590 	if (disable)
591 		return disable_vport(fc_vport);
592 	else
593 		return enable_vport(fc_vport);
594 }
595 
596 int
lpfc_vport_delete(struct fc_vport * fc_vport)597 lpfc_vport_delete(struct fc_vport *fc_vport)
598 {
599 	struct lpfc_nodelist *ndlp = NULL;
600 	struct lpfc_vport *vport = *(struct lpfc_vport **)fc_vport->dd_data;
601 	struct Scsi_Host *shost = lpfc_shost_from_vport(vport);
602 	struct lpfc_hba  *phba = vport->phba;
603 	long timeout;
604 
605 	if (vport->port_type == LPFC_PHYSICAL_PORT) {
606 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
607 				 "1812 vport_delete failed: Cannot delete "
608 				 "physical host\n");
609 		return VPORT_ERROR;
610 	}
611 
612 	/* If the vport is a static vport fail the deletion. */
613 	if ((vport->vport_flag & STATIC_VPORT) &&
614 		!(phba->pport->load_flag & FC_UNLOADING)) {
615 		lpfc_printf_vlog(vport, KERN_ERR, LOG_TRACE_EVENT,
616 				 "1837 vport_delete failed: Cannot delete "
617 				 "static vport.\n");
618 		return VPORT_ERROR;
619 	}
620 
621 	spin_lock_irq(&phba->hbalock);
622 	vport->load_flag |= FC_UNLOADING;
623 	spin_unlock_irq(&phba->hbalock);
624 
625 	/*
626 	 * If we are not unloading the driver then prevent the vport_delete
627 	 * from happening until after this vport's discovery is finished.
628 	 */
629 	if (!(phba->pport->load_flag & FC_UNLOADING)) {
630 		int check_count = 0;
631 		while (check_count < ((phba->fc_ratov * 3) + 3) &&
632 		       vport->port_state > LPFC_VPORT_FAILED &&
633 		       vport->port_state < LPFC_VPORT_READY) {
634 			check_count++;
635 			msleep(1000);
636 		}
637 		if (vport->port_state > LPFC_VPORT_FAILED &&
638 		    vport->port_state < LPFC_VPORT_READY)
639 			return -EAGAIN;
640 	}
641 
642 	/*
643 	 * Take early refcount for outstanding I/O requests we schedule during
644 	 * delete processing for unreg_vpi.  Always keep this before
645 	 * scsi_remove_host() as we can no longer obtain a reference through
646 	 * scsi_host_get() after scsi_host_remove as shost is set to SHOST_DEL.
647 	 */
648 	if (!scsi_host_get(shost))
649 		return VPORT_INVAL;
650 
651 	lpfc_free_sysfs_attr(vport);
652 	lpfc_debugfs_terminate(vport);
653 
654 	/* Remove FC host to break driver binding. */
655 	fc_remove_host(shost);
656 	scsi_remove_host(shost);
657 
658 	/* Send the DA_ID and Fabric LOGO to cleanup Nameserver entries. */
659 	ndlp = lpfc_findnode_did(vport, Fabric_DID);
660 	if (!ndlp)
661 		goto skip_logo;
662 
663 	if (ndlp && ndlp->nlp_state == NLP_STE_UNMAPPED_NODE &&
664 	    phba->link_state >= LPFC_LINK_UP &&
665 	    phba->fc_topology != LPFC_TOPOLOGY_LOOP) {
666 		if (vport->cfg_enable_da_id) {
667 			/* Send DA_ID and wait for a completion. */
668 			timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
669 			if (!lpfc_ns_cmd(vport, SLI_CTNS_DA_ID, 0, 0))
670 				while (vport->ct_flags && timeout)
671 					timeout = schedule_timeout(timeout);
672 			else
673 				lpfc_printf_log(vport->phba, KERN_WARNING,
674 						LOG_VPORT,
675 						"1829 CT command failed to "
676 						"delete objects on fabric\n");
677 		}
678 
679 		/*
680 		 * If the vpi is not registered, then a valid FDISC doesn't
681 		 * exist and there is no need for a ELS LOGO.  Just cleanup
682 		 * the ndlp.
683 		 */
684 		if (!(vport->vpi_state & LPFC_VPI_REGISTERED))
685 			goto skip_logo;
686 
687 		/* Issue a Fabric LOGO to cleanup fabric resources. */
688 		ndlp = lpfc_findnode_did(vport, Fabric_DID);
689 		if (!ndlp)
690 			goto skip_logo;
691 		vport->unreg_vpi_cmpl = VPORT_INVAL;
692 		timeout = msecs_to_jiffies(phba->fc_ratov * 2000);
693 		if (!lpfc_issue_els_npiv_logo(vport, ndlp))
694 			while (vport->unreg_vpi_cmpl == VPORT_INVAL && timeout)
695 				timeout = schedule_timeout(timeout);
696 	}
697 
698 	if (!(phba->pport->load_flag & FC_UNLOADING))
699 		lpfc_discovery_wait(vport);
700 
701 skip_logo:
702 
703 	lpfc_cleanup(vport);
704 
705 	/* Remove scsi host now.  The nodes are cleaned up. */
706 	lpfc_sli_host_down(vport);
707 	lpfc_stop_vport_timers(vport);
708 
709 	if (!(phba->pport->load_flag & FC_UNLOADING)) {
710 		lpfc_unreg_all_rpis(vport);
711 		lpfc_unreg_default_rpis(vport);
712 		/*
713 		 * Completion of unreg_vpi (lpfc_mbx_cmpl_unreg_vpi)
714 		 * does the scsi_host_put() to release the vport.
715 		 */
716 		if (!(vport->vpi_state & LPFC_VPI_REGISTERED) ||
717 				lpfc_mbx_unreg_vpi(vport))
718 			scsi_host_put(shost);
719 	} else {
720 		scsi_host_put(shost);
721 	}
722 
723 	lpfc_free_vpi(phba, vport->vpi);
724 	vport->work_port_events = 0;
725 	spin_lock_irq(&phba->port_list_lock);
726 	list_del_init(&vport->listentry);
727 	spin_unlock_irq(&phba->port_list_lock);
728 	lpfc_printf_vlog(vport, KERN_ERR, LOG_VPORT,
729 			 "1828 Vport Deleted.\n");
730 	scsi_host_put(shost);
731 	return VPORT_OK;
732 }
733 
734 struct lpfc_vport **
lpfc_create_vport_work_array(struct lpfc_hba * phba)735 lpfc_create_vport_work_array(struct lpfc_hba *phba)
736 {
737 	struct lpfc_vport *port_iterator;
738 	struct lpfc_vport **vports;
739 	int index = 0;
740 	vports = kcalloc(phba->max_vports + 1, sizeof(struct lpfc_vport *),
741 			 GFP_KERNEL);
742 	if (vports == NULL)
743 		return NULL;
744 	spin_lock_irq(&phba->port_list_lock);
745 	list_for_each_entry(port_iterator, &phba->port_list, listentry) {
746 		if (port_iterator->load_flag & FC_UNLOADING)
747 			continue;
748 		if (!scsi_host_get(lpfc_shost_from_vport(port_iterator))) {
749 			lpfc_printf_vlog(port_iterator, KERN_ERR,
750 					 LOG_TRACE_EVENT,
751 					 "1801 Create vport work array FAILED: "
752 					 "cannot do scsi_host_get\n");
753 			continue;
754 		}
755 		vports[index++] = port_iterator;
756 	}
757 	spin_unlock_irq(&phba->port_list_lock);
758 	return vports;
759 }
760 
761 void
lpfc_destroy_vport_work_array(struct lpfc_hba * phba,struct lpfc_vport ** vports)762 lpfc_destroy_vport_work_array(struct lpfc_hba *phba, struct lpfc_vport **vports)
763 {
764 	int i;
765 	if (vports == NULL)
766 		return;
767 	for (i = 0; i <= phba->max_vports && vports[i] != NULL; i++)
768 		scsi_host_put(lpfc_shost_from_vport(vports[i]));
769 	kfree(vports);
770 }
771 
772 
773 /**
774  * lpfc_vport_reset_stat_data - Reset the statistical data for the vport
775  * @vport: Pointer to vport object.
776  *
777  * This function resets the statistical data for the vport. This function
778  * is called with the host_lock held
779  **/
780 void
lpfc_vport_reset_stat_data(struct lpfc_vport * vport)781 lpfc_vport_reset_stat_data(struct lpfc_vport *vport)
782 {
783 	struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
784 
785 	list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
786 		if (ndlp->lat_data)
787 			memset(ndlp->lat_data, 0, LPFC_MAX_BUCKET_COUNT *
788 				sizeof(struct lpfc_scsicmd_bkt));
789 	}
790 }
791 
792 
793 /**
794  * lpfc_alloc_bucket - Allocate data buffer required for statistical data
795  * @vport: Pointer to vport object.
796  *
797  * This function allocates data buffer required for all the FC
798  * nodes of the vport to collect statistical data.
799  **/
800 void
lpfc_alloc_bucket(struct lpfc_vport * vport)801 lpfc_alloc_bucket(struct lpfc_vport *vport)
802 {
803 	struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
804 
805 	list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
806 
807 		kfree(ndlp->lat_data);
808 		ndlp->lat_data = NULL;
809 
810 		if (ndlp->nlp_state == NLP_STE_MAPPED_NODE) {
811 			ndlp->lat_data = kcalloc(LPFC_MAX_BUCKET_COUNT,
812 					 sizeof(struct lpfc_scsicmd_bkt),
813 					 GFP_ATOMIC);
814 
815 			if (!ndlp->lat_data)
816 				lpfc_printf_vlog(vport, KERN_ERR,
817 					LOG_TRACE_EVENT,
818 					"0287 lpfc_alloc_bucket failed to "
819 					"allocate statistical data buffer DID "
820 					"0x%x\n", ndlp->nlp_DID);
821 		}
822 	}
823 }
824 
825 /**
826  * lpfc_free_bucket - Free data buffer required for statistical data
827  * @vport: Pointer to vport object.
828  *
829  * Th function frees statistical data buffer of all the FC
830  * nodes of the vport.
831  **/
832 void
lpfc_free_bucket(struct lpfc_vport * vport)833 lpfc_free_bucket(struct lpfc_vport *vport)
834 {
835 	struct lpfc_nodelist *ndlp = NULL, *next_ndlp = NULL;
836 
837 	list_for_each_entry_safe(ndlp, next_ndlp, &vport->fc_nodes, nlp_listp) {
838 
839 		kfree(ndlp->lat_data);
840 		ndlp->lat_data = NULL;
841 	}
842 }
843