1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2005-2014 Brocade Communications Systems, Inc.
4  * Copyright (c) 2014- QLogic Corporation.
5  * All rights reserved
6  * www.qlogic.com
7  *
8  * Linux driver for QLogic BR-series Fibre Channel Host Bus Adapter.
9  */
10 
11 /*
12  *  bfad_im.c Linux driver IM module.
13  */
14 
15 #include <linux/export.h>
16 
17 #include "bfad_drv.h"
18 #include "bfad_im.h"
19 #include "bfa_fcs.h"
20 
21 BFA_TRC_FILE(LDRV, IM);
22 
23 DEFINE_IDR(bfad_im_port_index);
24 struct scsi_transport_template *bfad_im_scsi_transport_template;
25 struct scsi_transport_template *bfad_im_scsi_vport_transport_template;
26 static void bfad_im_itnim_work_handler(struct work_struct *work);
27 static int bfad_im_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *cmnd);
28 static int bfad_im_slave_alloc(struct scsi_device *sdev);
29 static void bfad_im_fc_rport_add(struct bfad_im_port_s  *im_port,
30 				struct bfad_itnim_s *itnim);
31 
32 void
bfa_cb_ioim_done(void * drv,struct bfad_ioim_s * dio,enum bfi_ioim_status io_status,u8 scsi_status,int sns_len,u8 * sns_info,s32 residue)33 bfa_cb_ioim_done(void *drv, struct bfad_ioim_s *dio,
34 			enum bfi_ioim_status io_status, u8 scsi_status,
35 			int sns_len, u8 *sns_info, s32 residue)
36 {
37 	struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
38 	struct bfad_s         *bfad = drv;
39 	struct bfad_itnim_data_s *itnim_data;
40 	struct bfad_itnim_s *itnim;
41 	u8         host_status = DID_OK;
42 
43 	switch (io_status) {
44 	case BFI_IOIM_STS_OK:
45 		bfa_trc(bfad, scsi_status);
46 		scsi_set_resid(cmnd, 0);
47 
48 		if (sns_len > 0) {
49 			bfa_trc(bfad, sns_len);
50 			if (sns_len > SCSI_SENSE_BUFFERSIZE)
51 				sns_len = SCSI_SENSE_BUFFERSIZE;
52 			memcpy(cmnd->sense_buffer, sns_info, sns_len);
53 		}
54 
55 		if (residue > 0) {
56 			bfa_trc(bfad, residue);
57 			scsi_set_resid(cmnd, residue);
58 			if (!sns_len && (scsi_status == SAM_STAT_GOOD) &&
59 				(scsi_bufflen(cmnd) - residue) <
60 					cmnd->underflow) {
61 				bfa_trc(bfad, 0);
62 				host_status = DID_ERROR;
63 			}
64 		}
65 		cmnd->result = host_status << 16 | scsi_status;
66 
67 		break;
68 
69 	case BFI_IOIM_STS_TIMEDOUT:
70 		cmnd->result = DID_TIME_OUT << 16;
71 		break;
72 	case BFI_IOIM_STS_PATHTOV:
73 		cmnd->result = DID_TRANSPORT_DISRUPTED << 16;
74 		break;
75 	default:
76 		cmnd->result = DID_ERROR << 16;
77 	}
78 
79 	/* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
80 	if (cmnd->device->host != NULL)
81 		scsi_dma_unmap(cmnd);
82 
83 	cmnd->host_scribble = NULL;
84 	bfa_trc(bfad, cmnd->result);
85 
86 	itnim_data = cmnd->device->hostdata;
87 	if (itnim_data) {
88 		itnim = itnim_data->itnim;
89 		if (!cmnd->result && itnim &&
90 			 (bfa_lun_queue_depth > cmnd->device->queue_depth)) {
91 			/* Queue depth adjustment for good status completion */
92 			bfad_ramp_up_qdepth(itnim, cmnd->device);
93 		} else if (cmnd->result == SAM_STAT_TASK_SET_FULL && itnim) {
94 			/* qfull handling */
95 			bfad_handle_qfull(itnim, cmnd->device);
96 		}
97 	}
98 
99 	scsi_done(cmnd);
100 }
101 
102 void
bfa_cb_ioim_good_comp(void * drv,struct bfad_ioim_s * dio)103 bfa_cb_ioim_good_comp(void *drv, struct bfad_ioim_s *dio)
104 {
105 	struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
106 	struct bfad_itnim_data_s *itnim_data;
107 	struct bfad_itnim_s *itnim;
108 
109 	cmnd->result = DID_OK << 16 | SAM_STAT_GOOD;
110 
111 	/* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
112 	if (cmnd->device->host != NULL)
113 		scsi_dma_unmap(cmnd);
114 
115 	cmnd->host_scribble = NULL;
116 
117 	/* Queue depth adjustment */
118 	if (bfa_lun_queue_depth > cmnd->device->queue_depth) {
119 		itnim_data = cmnd->device->hostdata;
120 		if (itnim_data) {
121 			itnim = itnim_data->itnim;
122 			if (itnim)
123 				bfad_ramp_up_qdepth(itnim, cmnd->device);
124 		}
125 	}
126 
127 	scsi_done(cmnd);
128 }
129 
130 void
bfa_cb_ioim_abort(void * drv,struct bfad_ioim_s * dio)131 bfa_cb_ioim_abort(void *drv, struct bfad_ioim_s *dio)
132 {
133 	struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dio;
134 	struct bfad_s         *bfad = drv;
135 
136 	cmnd->result = DID_ERROR << 16;
137 
138 	/* Unmap DMA, if host is NULL, it means a scsi passthru cmd */
139 	if (cmnd->device->host != NULL)
140 		scsi_dma_unmap(cmnd);
141 
142 	bfa_trc(bfad, cmnd->result);
143 	cmnd->host_scribble = NULL;
144 }
145 
146 void
bfa_cb_tskim_done(void * bfad,struct bfad_tskim_s * dtsk,enum bfi_tskim_status tsk_status)147 bfa_cb_tskim_done(void *bfad, struct bfad_tskim_s *dtsk,
148 		   enum bfi_tskim_status tsk_status)
149 {
150 	struct scsi_cmnd *cmnd = (struct scsi_cmnd *)dtsk;
151 	wait_queue_head_t *wq;
152 
153 	bfad_priv(cmnd)->status |= tsk_status << 1;
154 	set_bit(IO_DONE_BIT, &bfad_priv(cmnd)->status);
155 	wq = bfad_priv(cmnd)->wq;
156 	bfad_priv(cmnd)->wq = NULL;
157 
158 	if (wq)
159 		wake_up(wq);
160 }
161 
162 /*
163  *  Scsi_Host_template SCSI host template
164  */
165 /*
166  * Scsi_Host template entry, returns BFAD PCI info.
167  */
168 static const char *
bfad_im_info(struct Scsi_Host * shost)169 bfad_im_info(struct Scsi_Host *shost)
170 {
171 	static char     bfa_buf[256];
172 	struct bfad_im_port_s *im_port =
173 			(struct bfad_im_port_s *) shost->hostdata[0];
174 	struct bfad_s *bfad = im_port->bfad;
175 
176 	memset(bfa_buf, 0, sizeof(bfa_buf));
177 	snprintf(bfa_buf, sizeof(bfa_buf),
178 		"QLogic BR-series FC/FCOE Adapter, hwpath: %s driver: %s",
179 		bfad->pci_name, BFAD_DRIVER_VERSION);
180 
181 	return bfa_buf;
182 }
183 
184 /*
185  * Scsi_Host template entry, aborts the specified SCSI command.
186  *
187  * Returns: SUCCESS or FAILED.
188  */
189 static int
bfad_im_abort_handler(struct scsi_cmnd * cmnd)190 bfad_im_abort_handler(struct scsi_cmnd *cmnd)
191 {
192 	struct Scsi_Host *shost = cmnd->device->host;
193 	struct bfad_im_port_s *im_port =
194 			(struct bfad_im_port_s *) shost->hostdata[0];
195 	struct bfad_s         *bfad = im_port->bfad;
196 	struct bfa_ioim_s *hal_io;
197 	unsigned long   flags;
198 	u32        timeout;
199 	int             rc = FAILED;
200 
201 	spin_lock_irqsave(&bfad->bfad_lock, flags);
202 	hal_io = (struct bfa_ioim_s *) cmnd->host_scribble;
203 	if (!hal_io) {
204 		/* IO has been completed, return success */
205 		rc = SUCCESS;
206 		goto out;
207 	}
208 	if (hal_io->dio != (struct bfad_ioim_s *) cmnd) {
209 		rc = FAILED;
210 		goto out;
211 	}
212 
213 	bfa_trc(bfad, hal_io->iotag);
214 	BFA_LOG(KERN_INFO, bfad, bfa_log_level,
215 		"scsi%d: abort cmnd %p iotag %x\n",
216 		im_port->shost->host_no, cmnd, hal_io->iotag);
217 	(void) bfa_ioim_abort(hal_io);
218 	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
219 
220 	/* Need to wait until the command get aborted */
221 	timeout = 10;
222 	while ((struct bfa_ioim_s *) cmnd->host_scribble == hal_io) {
223 		set_current_state(TASK_UNINTERRUPTIBLE);
224 		schedule_timeout(timeout);
225 		if (timeout < 4 * HZ)
226 			timeout *= 2;
227 	}
228 
229 	scsi_done(cmnd);
230 	bfa_trc(bfad, hal_io->iotag);
231 	BFA_LOG(KERN_INFO, bfad, bfa_log_level,
232 		"scsi%d: complete abort 0x%p iotag 0x%x\n",
233 		im_port->shost->host_no, cmnd, hal_io->iotag);
234 	return SUCCESS;
235 out:
236 	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
237 	return rc;
238 }
239 
240 static bfa_status_t
bfad_im_target_reset_send(struct bfad_s * bfad,struct scsi_cmnd * cmnd,struct bfad_itnim_s * itnim)241 bfad_im_target_reset_send(struct bfad_s *bfad, struct scsi_cmnd *cmnd,
242 		     struct bfad_itnim_s *itnim)
243 {
244 	struct bfa_tskim_s *tskim;
245 	struct bfa_itnim_s *bfa_itnim;
246 	bfa_status_t    rc = BFA_STATUS_OK;
247 	struct scsi_lun scsilun;
248 
249 	tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
250 	if (!tskim) {
251 		BFA_LOG(KERN_ERR, bfad, bfa_log_level,
252 			"target reset, fail to allocate tskim\n");
253 		rc = BFA_STATUS_FAILED;
254 		goto out;
255 	}
256 
257 	/*
258 	 * Set host_scribble to NULL to avoid aborting a task command if
259 	 * happens.
260 	 */
261 	cmnd->host_scribble = NULL;
262 	bfad_priv(cmnd)->status = 0;
263 	bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
264 	/*
265 	 * bfa_itnim can be NULL if the port gets disconnected and the bfa
266 	 * and fcs layers have cleaned up their nexus with the targets and
267 	 * the same has not been cleaned up by the shim
268 	 */
269 	if (bfa_itnim == NULL) {
270 		bfa_tskim_free(tskim);
271 		BFA_LOG(KERN_ERR, bfad, bfa_log_level,
272 			"target reset, bfa_itnim is NULL\n");
273 		rc = BFA_STATUS_FAILED;
274 		goto out;
275 	}
276 
277 	memset(&scsilun, 0, sizeof(scsilun));
278 	bfa_tskim_start(tskim, bfa_itnim, scsilun,
279 			    FCP_TM_TARGET_RESET, BFAD_TARGET_RESET_TMO);
280 out:
281 	return rc;
282 }
283 
284 /*
285  * Scsi_Host template entry, resets a LUN and abort its all commands.
286  *
287  * Returns: SUCCESS or FAILED.
288  *
289  */
290 static int
bfad_im_reset_lun_handler(struct scsi_cmnd * cmnd)291 bfad_im_reset_lun_handler(struct scsi_cmnd *cmnd)
292 {
293 	struct Scsi_Host *shost = cmnd->device->host;
294 	struct bfad_im_port_s *im_port =
295 			(struct bfad_im_port_s *) shost->hostdata[0];
296 	struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
297 	struct bfad_s         *bfad = im_port->bfad;
298 	struct bfa_tskim_s *tskim;
299 	struct bfad_itnim_s   *itnim;
300 	struct bfa_itnim_s *bfa_itnim;
301 	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
302 	int             rc = SUCCESS;
303 	unsigned long   flags;
304 	enum bfi_tskim_status task_status;
305 	struct scsi_lun scsilun;
306 
307 	spin_lock_irqsave(&bfad->bfad_lock, flags);
308 	itnim = itnim_data->itnim;
309 	if (!itnim) {
310 		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
311 		rc = FAILED;
312 		goto out;
313 	}
314 
315 	tskim = bfa_tskim_alloc(&bfad->bfa, (struct bfad_tskim_s *) cmnd);
316 	if (!tskim) {
317 		BFA_LOG(KERN_ERR, bfad, bfa_log_level,
318 				"LUN reset, fail to allocate tskim");
319 		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
320 		rc = FAILED;
321 		goto out;
322 	}
323 
324 	/*
325 	 * Set host_scribble to NULL to avoid aborting a task command
326 	 * if happens.
327 	 */
328 	cmnd->host_scribble = NULL;
329 	bfad_priv(cmnd)->wq = &wq;
330 	bfad_priv(cmnd)->status = 0;
331 	bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim->fcs_itnim);
332 	/*
333 	 * bfa_itnim can be NULL if the port gets disconnected and the bfa
334 	 * and fcs layers have cleaned up their nexus with the targets and
335 	 * the same has not been cleaned up by the shim
336 	 */
337 	if (bfa_itnim == NULL) {
338 		bfa_tskim_free(tskim);
339 		BFA_LOG(KERN_ERR, bfad, bfa_log_level,
340 			"lun reset, bfa_itnim is NULL\n");
341 		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
342 		rc = FAILED;
343 		goto out;
344 	}
345 	int_to_scsilun(cmnd->device->lun, &scsilun);
346 	bfa_tskim_start(tskim, bfa_itnim, scsilun,
347 			    FCP_TM_LUN_RESET, BFAD_LUN_RESET_TMO);
348 	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
349 
350 	wait_event(wq, test_bit(IO_DONE_BIT, &bfad_priv(cmnd)->status));
351 
352 	task_status = bfad_priv(cmnd)->status >> 1;
353 	if (task_status != BFI_TSKIM_STS_OK) {
354 		BFA_LOG(KERN_ERR, bfad, bfa_log_level,
355 			"LUN reset failure, status: %d\n", task_status);
356 		rc = FAILED;
357 	}
358 
359 out:
360 	return rc;
361 }
362 
363 /*
364  * Scsi_Host template entry, resets the target and abort all commands.
365  */
366 static int
bfad_im_reset_target_handler(struct scsi_cmnd * cmnd)367 bfad_im_reset_target_handler(struct scsi_cmnd *cmnd)
368 {
369 	struct Scsi_Host *shost = cmnd->device->host;
370 	struct scsi_target *starget = scsi_target(cmnd->device);
371 	struct bfad_im_port_s *im_port =
372 				(struct bfad_im_port_s *) shost->hostdata[0];
373 	struct bfad_s         *bfad = im_port->bfad;
374 	struct bfad_itnim_s   *itnim;
375 	unsigned long   flags;
376 	u32        rc, rtn = FAILED;
377 	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
378 	enum bfi_tskim_status task_status;
379 
380 	spin_lock_irqsave(&bfad->bfad_lock, flags);
381 	itnim = bfad_get_itnim(im_port, starget->id);
382 	if (itnim) {
383 		bfad_priv(cmnd)->wq = &wq;
384 		rc = bfad_im_target_reset_send(bfad, cmnd, itnim);
385 		if (rc == BFA_STATUS_OK) {
386 			/* wait target reset to complete */
387 			spin_unlock_irqrestore(&bfad->bfad_lock, flags);
388 			wait_event(wq, test_bit(IO_DONE_BIT,
389 						&bfad_priv(cmnd)->status));
390 			spin_lock_irqsave(&bfad->bfad_lock, flags);
391 
392 			task_status = bfad_priv(cmnd)->status >> 1;
393 			if (task_status != BFI_TSKIM_STS_OK)
394 				BFA_LOG(KERN_ERR, bfad, bfa_log_level,
395 					"target reset failure,"
396 					" status: %d\n", task_status);
397 			else
398 				rtn = SUCCESS;
399 		}
400 	}
401 	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
402 
403 	return rtn;
404 }
405 
406 /*
407  * Scsi_Host template entry slave_destroy.
408  */
409 static void
bfad_im_slave_destroy(struct scsi_device * sdev)410 bfad_im_slave_destroy(struct scsi_device *sdev)
411 {
412 	sdev->hostdata = NULL;
413 	return;
414 }
415 
416 /*
417  *  BFA FCS itnim callbacks
418  */
419 
420 /*
421  * BFA FCS itnim alloc callback, after successful PRLI
422  * Context: Interrupt
423  */
424 int
bfa_fcb_itnim_alloc(struct bfad_s * bfad,struct bfa_fcs_itnim_s ** itnim,struct bfad_itnim_s ** itnim_drv)425 bfa_fcb_itnim_alloc(struct bfad_s *bfad, struct bfa_fcs_itnim_s **itnim,
426 		    struct bfad_itnim_s **itnim_drv)
427 {
428 	*itnim_drv = kzalloc(sizeof(struct bfad_itnim_s), GFP_ATOMIC);
429 	if (*itnim_drv == NULL)
430 		return -ENOMEM;
431 
432 	(*itnim_drv)->im = bfad->im;
433 	*itnim = &(*itnim_drv)->fcs_itnim;
434 	(*itnim_drv)->state = ITNIM_STATE_NONE;
435 
436 	/*
437 	 * Initiaze the itnim_work
438 	 */
439 	INIT_WORK(&(*itnim_drv)->itnim_work, bfad_im_itnim_work_handler);
440 	bfad->bfad_flags |= BFAD_RPORT_ONLINE;
441 	return 0;
442 }
443 
444 /*
445  * BFA FCS itnim free callback.
446  * Context: Interrupt. bfad_lock is held
447  */
448 void
bfa_fcb_itnim_free(struct bfad_s * bfad,struct bfad_itnim_s * itnim_drv)449 bfa_fcb_itnim_free(struct bfad_s *bfad, struct bfad_itnim_s *itnim_drv)
450 {
451 	struct bfad_port_s    *port;
452 	wwn_t wwpn;
453 	u32 fcid;
454 	char wwpn_str[32], fcid_str[16];
455 	struct bfad_im_s	*im = itnim_drv->im;
456 
457 	/* online to free state transtion should not happen */
458 	WARN_ON(itnim_drv->state == ITNIM_STATE_ONLINE);
459 
460 	itnim_drv->queue_work = 1;
461 	/* offline request is not yet done, use the same request to free */
462 	if (itnim_drv->state == ITNIM_STATE_OFFLINE_PENDING)
463 		itnim_drv->queue_work = 0;
464 
465 	itnim_drv->state = ITNIM_STATE_FREE;
466 	port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
467 	itnim_drv->im_port = port->im_port;
468 	wwpn = bfa_fcs_itnim_get_pwwn(&itnim_drv->fcs_itnim);
469 	fcid = bfa_fcs_itnim_get_fcid(&itnim_drv->fcs_itnim);
470 	wwn2str(wwpn_str, wwpn);
471 	fcid2str(fcid_str, fcid);
472 	BFA_LOG(KERN_INFO, bfad, bfa_log_level,
473 		"ITNIM FREE scsi%d: FCID: %s WWPN: %s\n",
474 		port->im_port->shost->host_no,
475 		fcid_str, wwpn_str);
476 
477 	/* ITNIM processing */
478 	if (itnim_drv->queue_work)
479 		queue_work(im->drv_workq, &itnim_drv->itnim_work);
480 }
481 
482 /*
483  * BFA FCS itnim online callback.
484  * Context: Interrupt. bfad_lock is held
485  */
486 void
bfa_fcb_itnim_online(struct bfad_itnim_s * itnim_drv)487 bfa_fcb_itnim_online(struct bfad_itnim_s *itnim_drv)
488 {
489 	struct bfad_port_s    *port;
490 	struct bfad_im_s	*im = itnim_drv->im;
491 
492 	itnim_drv->bfa_itnim = bfa_fcs_itnim_get_halitn(&itnim_drv->fcs_itnim);
493 	port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
494 	itnim_drv->state = ITNIM_STATE_ONLINE;
495 	itnim_drv->queue_work = 1;
496 	itnim_drv->im_port = port->im_port;
497 
498 	/* ITNIM processing */
499 	if (itnim_drv->queue_work)
500 		queue_work(im->drv_workq, &itnim_drv->itnim_work);
501 }
502 
503 /*
504  * BFA FCS itnim offline callback.
505  * Context: Interrupt. bfad_lock is held
506  */
507 void
bfa_fcb_itnim_offline(struct bfad_itnim_s * itnim_drv)508 bfa_fcb_itnim_offline(struct bfad_itnim_s *itnim_drv)
509 {
510 	struct bfad_port_s    *port;
511 	struct bfad_s *bfad;
512 	struct bfad_im_s	*im = itnim_drv->im;
513 
514 	port = bfa_fcs_itnim_get_drvport(&itnim_drv->fcs_itnim);
515 	bfad = port->bfad;
516 	if ((bfad->pport.flags & BFAD_PORT_DELETE) ||
517 		 (port->flags & BFAD_PORT_DELETE)) {
518 		itnim_drv->state = ITNIM_STATE_OFFLINE;
519 		return;
520 	}
521 	itnim_drv->im_port = port->im_port;
522 	itnim_drv->state = ITNIM_STATE_OFFLINE_PENDING;
523 	itnim_drv->queue_work = 1;
524 
525 	/* ITNIM processing */
526 	if (itnim_drv->queue_work)
527 		queue_work(im->drv_workq, &itnim_drv->itnim_work);
528 }
529 
530 /*
531  * Allocate a Scsi_Host for a port.
532  */
533 int
bfad_im_scsi_host_alloc(struct bfad_s * bfad,struct bfad_im_port_s * im_port,struct device * dev)534 bfad_im_scsi_host_alloc(struct bfad_s *bfad, struct bfad_im_port_s *im_port,
535 			struct device *dev)
536 {
537 	struct bfad_im_port_pointer *im_portp;
538 	int error;
539 
540 	mutex_lock(&bfad_mutex);
541 	error = idr_alloc(&bfad_im_port_index, im_port, 0, 0, GFP_KERNEL);
542 	if (error < 0) {
543 		mutex_unlock(&bfad_mutex);
544 		printk(KERN_WARNING "idr_alloc failure\n");
545 		goto out;
546 	}
547 	im_port->idr_id = error;
548 	mutex_unlock(&bfad_mutex);
549 
550 	im_port->shost = bfad_scsi_host_alloc(im_port, bfad);
551 	if (!im_port->shost) {
552 		error = 1;
553 		goto out_free_idr;
554 	}
555 
556 	im_portp = shost_priv(im_port->shost);
557 	im_portp->p = im_port;
558 	im_port->shost->unique_id = im_port->idr_id;
559 	im_port->shost->this_id = -1;
560 	im_port->shost->max_id = MAX_FCP_TARGET;
561 	im_port->shost->max_lun = MAX_FCP_LUN;
562 	im_port->shost->max_cmd_len = 16;
563 	im_port->shost->can_queue = bfad->cfg_data.ioc_queue_depth;
564 	if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
565 		im_port->shost->transportt = bfad_im_scsi_transport_template;
566 	else
567 		im_port->shost->transportt =
568 				bfad_im_scsi_vport_transport_template;
569 
570 	error = scsi_add_host_with_dma(im_port->shost, dev, &bfad->pcidev->dev);
571 	if (error) {
572 		printk(KERN_WARNING "scsi_add_host failure %d\n", error);
573 		goto out_fc_rel;
574 	}
575 
576 	return 0;
577 
578 out_fc_rel:
579 	scsi_host_put(im_port->shost);
580 	im_port->shost = NULL;
581 out_free_idr:
582 	mutex_lock(&bfad_mutex);
583 	idr_remove(&bfad_im_port_index, im_port->idr_id);
584 	mutex_unlock(&bfad_mutex);
585 out:
586 	return error;
587 }
588 
589 void
bfad_im_scsi_host_free(struct bfad_s * bfad,struct bfad_im_port_s * im_port)590 bfad_im_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
591 {
592 	bfa_trc(bfad, bfad->inst_no);
593 	BFA_LOG(KERN_INFO, bfad, bfa_log_level, "Free scsi%d\n",
594 			im_port->shost->host_no);
595 
596 	fc_remove_host(im_port->shost);
597 
598 	scsi_remove_host(im_port->shost);
599 	scsi_host_put(im_port->shost);
600 
601 	mutex_lock(&bfad_mutex);
602 	idr_remove(&bfad_im_port_index, im_port->idr_id);
603 	mutex_unlock(&bfad_mutex);
604 }
605 
606 static void
bfad_im_port_delete_handler(struct work_struct * work)607 bfad_im_port_delete_handler(struct work_struct *work)
608 {
609 	struct bfad_im_port_s *im_port =
610 		container_of(work, struct bfad_im_port_s, port_delete_work);
611 
612 	if (im_port->port->pvb_type != BFAD_PORT_PHYS_BASE) {
613 		im_port->flags |= BFAD_PORT_DELETE;
614 		fc_vport_terminate(im_port->fc_vport);
615 	}
616 }
617 
618 bfa_status_t
bfad_im_port_new(struct bfad_s * bfad,struct bfad_port_s * port)619 bfad_im_port_new(struct bfad_s *bfad, struct bfad_port_s *port)
620 {
621 	int             rc = BFA_STATUS_OK;
622 	struct bfad_im_port_s *im_port;
623 
624 	im_port = kzalloc(sizeof(struct bfad_im_port_s), GFP_ATOMIC);
625 	if (im_port == NULL) {
626 		rc = BFA_STATUS_ENOMEM;
627 		goto ext;
628 	}
629 	port->im_port = im_port;
630 	im_port->port = port;
631 	im_port->bfad = bfad;
632 
633 	INIT_WORK(&im_port->port_delete_work, bfad_im_port_delete_handler);
634 	INIT_LIST_HEAD(&im_port->itnim_mapped_list);
635 	INIT_LIST_HEAD(&im_port->binding_list);
636 
637 ext:
638 	return rc;
639 }
640 
641 void
bfad_im_port_delete(struct bfad_s * bfad,struct bfad_port_s * port)642 bfad_im_port_delete(struct bfad_s *bfad, struct bfad_port_s *port)
643 {
644 	struct bfad_im_port_s *im_port = port->im_port;
645 
646 	queue_work(bfad->im->drv_workq,
647 				&im_port->port_delete_work);
648 }
649 
650 void
bfad_im_port_clean(struct bfad_im_port_s * im_port)651 bfad_im_port_clean(struct bfad_im_port_s *im_port)
652 {
653 	struct bfad_fcp_binding *bp, *bp_new;
654 	unsigned long flags;
655 	struct bfad_s *bfad =  im_port->bfad;
656 
657 	spin_lock_irqsave(&bfad->bfad_lock, flags);
658 	list_for_each_entry_safe(bp, bp_new, &im_port->binding_list,
659 					list_entry) {
660 		list_del(&bp->list_entry);
661 		kfree(bp);
662 	}
663 
664 	/* the itnim_mapped_list must be empty at this time */
665 	WARN_ON(!list_empty(&im_port->itnim_mapped_list));
666 
667 	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
668 }
669 
bfad_aen_im_notify_handler(struct work_struct * work)670 static void bfad_aen_im_notify_handler(struct work_struct *work)
671 {
672 	struct bfad_im_s *im =
673 		container_of(work, struct bfad_im_s, aen_im_notify_work);
674 	struct bfa_aen_entry_s *aen_entry;
675 	struct bfad_s *bfad = im->bfad;
676 	struct Scsi_Host *shost = bfad->pport.im_port->shost;
677 	void *event_data;
678 	unsigned long flags;
679 
680 	while (!list_empty(&bfad->active_aen_q)) {
681 		spin_lock_irqsave(&bfad->bfad_aen_spinlock, flags);
682 		bfa_q_deq(&bfad->active_aen_q, &aen_entry);
683 		spin_unlock_irqrestore(&bfad->bfad_aen_spinlock, flags);
684 		event_data = (char *)aen_entry + sizeof(struct list_head);
685 		fc_host_post_vendor_event(shost, fc_get_event_number(),
686 				sizeof(struct bfa_aen_entry_s) -
687 				sizeof(struct list_head),
688 				(char *)event_data, BFAD_NL_VENDOR_ID);
689 		spin_lock_irqsave(&bfad->bfad_aen_spinlock, flags);
690 		list_add_tail(&aen_entry->qe, &bfad->free_aen_q);
691 		spin_unlock_irqrestore(&bfad->bfad_aen_spinlock, flags);
692 	}
693 }
694 
695 bfa_status_t
bfad_im_probe(struct bfad_s * bfad)696 bfad_im_probe(struct bfad_s *bfad)
697 {
698 	struct bfad_im_s      *im;
699 
700 	im = kzalloc(sizeof(struct bfad_im_s), GFP_KERNEL);
701 	if (im == NULL)
702 		return BFA_STATUS_ENOMEM;
703 
704 	bfad->im = im;
705 	im->bfad = bfad;
706 
707 	if (bfad_thread_workq(bfad) != BFA_STATUS_OK) {
708 		kfree(im);
709 		return BFA_STATUS_FAILED;
710 	}
711 
712 	INIT_WORK(&im->aen_im_notify_work, bfad_aen_im_notify_handler);
713 	return BFA_STATUS_OK;
714 }
715 
716 void
bfad_im_probe_undo(struct bfad_s * bfad)717 bfad_im_probe_undo(struct bfad_s *bfad)
718 {
719 	if (bfad->im) {
720 		bfad_destroy_workq(bfad->im);
721 		kfree(bfad->im);
722 		bfad->im = NULL;
723 	}
724 }
725 
726 struct Scsi_Host *
bfad_scsi_host_alloc(struct bfad_im_port_s * im_port,struct bfad_s * bfad)727 bfad_scsi_host_alloc(struct bfad_im_port_s *im_port, struct bfad_s *bfad)
728 {
729 	struct scsi_host_template *sht;
730 
731 	if (im_port->port->pvb_type == BFAD_PORT_PHYS_BASE)
732 		sht = &bfad_im_scsi_host_template;
733 	else
734 		sht = &bfad_im_vport_template;
735 
736 	if (max_xfer_size != BFAD_MAX_SECTORS >> 1)
737 		sht->max_sectors = max_xfer_size << 1;
738 
739 	sht->sg_tablesize = bfad->cfg_data.io_max_sge;
740 
741 	return scsi_host_alloc(sht, sizeof(struct bfad_im_port_pointer));
742 }
743 
744 void
bfad_scsi_host_free(struct bfad_s * bfad,struct bfad_im_port_s * im_port)745 bfad_scsi_host_free(struct bfad_s *bfad, struct bfad_im_port_s *im_port)
746 {
747 	if (!(im_port->flags & BFAD_PORT_DELETE))
748 		flush_workqueue(bfad->im->drv_workq);
749 	bfad_im_scsi_host_free(im_port->bfad, im_port);
750 	bfad_im_port_clean(im_port);
751 	kfree(im_port);
752 }
753 
754 void
bfad_destroy_workq(struct bfad_im_s * im)755 bfad_destroy_workq(struct bfad_im_s *im)
756 {
757 	if (im && im->drv_workq) {
758 		destroy_workqueue(im->drv_workq);
759 		im->drv_workq = NULL;
760 	}
761 }
762 
763 bfa_status_t
bfad_thread_workq(struct bfad_s * bfad)764 bfad_thread_workq(struct bfad_s *bfad)
765 {
766 	struct bfad_im_s      *im = bfad->im;
767 
768 	bfa_trc(bfad, 0);
769 	snprintf(im->drv_workq_name, KOBJ_NAME_LEN, "bfad_wq_%d",
770 		 bfad->inst_no);
771 	im->drv_workq = create_singlethread_workqueue(im->drv_workq_name);
772 	if (!im->drv_workq)
773 		return BFA_STATUS_FAILED;
774 
775 	return BFA_STATUS_OK;
776 }
777 
778 /*
779  * Scsi_Host template entry.
780  *
781  * Description:
782  * OS entry point to adjust the queue_depths on a per-device basis.
783  * Called once per device during the bus scan.
784  * Return non-zero if fails.
785  */
786 static int
bfad_im_slave_configure(struct scsi_device * sdev)787 bfad_im_slave_configure(struct scsi_device *sdev)
788 {
789 	scsi_change_queue_depth(sdev, bfa_lun_queue_depth);
790 	return 0;
791 }
792 
793 struct scsi_host_template bfad_im_scsi_host_template = {
794 	.module = THIS_MODULE,
795 	.name = BFAD_DRIVER_NAME,
796 	.info = bfad_im_info,
797 	.queuecommand = bfad_im_queuecommand,
798 	.cmd_size = sizeof(struct bfad_cmd_priv),
799 	.eh_timed_out = fc_eh_timed_out,
800 	.eh_abort_handler = bfad_im_abort_handler,
801 	.eh_device_reset_handler = bfad_im_reset_lun_handler,
802 	.eh_target_reset_handler = bfad_im_reset_target_handler,
803 
804 	.slave_alloc = bfad_im_slave_alloc,
805 	.slave_configure = bfad_im_slave_configure,
806 	.slave_destroy = bfad_im_slave_destroy,
807 
808 	.this_id = -1,
809 	.sg_tablesize = BFAD_IO_MAX_SGE,
810 	.cmd_per_lun = 3,
811 	.shost_groups = bfad_im_host_groups,
812 	.max_sectors = BFAD_MAX_SECTORS,
813 	.vendor_id = BFA_PCI_VENDOR_ID_BROCADE,
814 };
815 
816 struct scsi_host_template bfad_im_vport_template = {
817 	.module = THIS_MODULE,
818 	.name = BFAD_DRIVER_NAME,
819 	.info = bfad_im_info,
820 	.queuecommand = bfad_im_queuecommand,
821 	.cmd_size = sizeof(struct bfad_cmd_priv),
822 	.eh_timed_out = fc_eh_timed_out,
823 	.eh_abort_handler = bfad_im_abort_handler,
824 	.eh_device_reset_handler = bfad_im_reset_lun_handler,
825 	.eh_target_reset_handler = bfad_im_reset_target_handler,
826 
827 	.slave_alloc = bfad_im_slave_alloc,
828 	.slave_configure = bfad_im_slave_configure,
829 	.slave_destroy = bfad_im_slave_destroy,
830 
831 	.this_id = -1,
832 	.sg_tablesize = BFAD_IO_MAX_SGE,
833 	.cmd_per_lun = 3,
834 	.shost_groups = bfad_im_vport_groups,
835 	.max_sectors = BFAD_MAX_SECTORS,
836 };
837 
838 bfa_status_t
bfad_im_module_init(void)839 bfad_im_module_init(void)
840 {
841 	bfad_im_scsi_transport_template =
842 		fc_attach_transport(&bfad_im_fc_function_template);
843 	if (!bfad_im_scsi_transport_template)
844 		return BFA_STATUS_ENOMEM;
845 
846 	bfad_im_scsi_vport_transport_template =
847 		fc_attach_transport(&bfad_im_vport_fc_function_template);
848 	if (!bfad_im_scsi_vport_transport_template) {
849 		fc_release_transport(bfad_im_scsi_transport_template);
850 		return BFA_STATUS_ENOMEM;
851 	}
852 
853 	return BFA_STATUS_OK;
854 }
855 
856 void
bfad_im_module_exit(void)857 bfad_im_module_exit(void)
858 {
859 	if (bfad_im_scsi_transport_template)
860 		fc_release_transport(bfad_im_scsi_transport_template);
861 
862 	if (bfad_im_scsi_vport_transport_template)
863 		fc_release_transport(bfad_im_scsi_vport_transport_template);
864 
865 	idr_destroy(&bfad_im_port_index);
866 }
867 
868 void
bfad_ramp_up_qdepth(struct bfad_itnim_s * itnim,struct scsi_device * sdev)869 bfad_ramp_up_qdepth(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
870 {
871 	struct scsi_device *tmp_sdev;
872 
873 	if (((jiffies - itnim->last_ramp_up_time) >
874 		BFA_QUEUE_FULL_RAMP_UP_TIME * HZ) &&
875 		((jiffies - itnim->last_queue_full_time) >
876 		BFA_QUEUE_FULL_RAMP_UP_TIME * HZ)) {
877 		shost_for_each_device(tmp_sdev, sdev->host) {
878 			if (bfa_lun_queue_depth > tmp_sdev->queue_depth) {
879 				if (tmp_sdev->id != sdev->id)
880 					continue;
881 				scsi_change_queue_depth(tmp_sdev,
882 					tmp_sdev->queue_depth + 1);
883 
884 				itnim->last_ramp_up_time = jiffies;
885 			}
886 		}
887 	}
888 }
889 
890 void
bfad_handle_qfull(struct bfad_itnim_s * itnim,struct scsi_device * sdev)891 bfad_handle_qfull(struct bfad_itnim_s *itnim, struct scsi_device *sdev)
892 {
893 	struct scsi_device *tmp_sdev;
894 
895 	itnim->last_queue_full_time = jiffies;
896 
897 	shost_for_each_device(tmp_sdev, sdev->host) {
898 		if (tmp_sdev->id != sdev->id)
899 			continue;
900 		scsi_track_queue_full(tmp_sdev, tmp_sdev->queue_depth - 1);
901 	}
902 }
903 
904 struct bfad_itnim_s *
bfad_get_itnim(struct bfad_im_port_s * im_port,int id)905 bfad_get_itnim(struct bfad_im_port_s *im_port, int id)
906 {
907 	struct bfad_itnim_s   *itnim = NULL;
908 
909 	/* Search the mapped list for this target ID */
910 	list_for_each_entry(itnim, &im_port->itnim_mapped_list, list_entry) {
911 		if (id == itnim->scsi_tgt_id)
912 			return itnim;
913 	}
914 
915 	return NULL;
916 }
917 
918 /*
919  * Function is invoked from the SCSI Host Template slave_alloc() entry point.
920  * Has the logic to query the LUN Mask database to check if this LUN needs to
921  * be made visible to the SCSI mid-layer or not.
922  *
923  * Returns BFA_STATUS_OK if this LUN needs to be added to the OS stack.
924  * Returns -ENXIO to notify SCSI mid-layer to not add this LUN to the OS stack.
925  */
926 static int
bfad_im_check_if_make_lun_visible(struct scsi_device * sdev,struct fc_rport * rport)927 bfad_im_check_if_make_lun_visible(struct scsi_device *sdev,
928 				  struct fc_rport *rport)
929 {
930 	struct bfad_itnim_data_s *itnim_data =
931 				(struct bfad_itnim_data_s *) rport->dd_data;
932 	struct bfa_s *bfa = itnim_data->itnim->bfa_itnim->bfa;
933 	struct bfa_rport_s *bfa_rport = itnim_data->itnim->bfa_itnim->rport;
934 	struct bfa_lun_mask_s *lun_list = bfa_get_lun_mask_list(bfa);
935 	int i = 0, ret = -ENXIO;
936 
937 	for (i = 0; i < MAX_LUN_MASK_CFG; i++) {
938 		if (lun_list[i].state == BFA_IOIM_LUN_MASK_ACTIVE &&
939 		    scsilun_to_int(&lun_list[i].lun) == sdev->lun &&
940 		    lun_list[i].rp_tag == bfa_rport->rport_tag &&
941 		    lun_list[i].lp_tag == (u8)bfa_rport->rport_info.lp_tag) {
942 			ret = BFA_STATUS_OK;
943 			break;
944 		}
945 	}
946 	return ret;
947 }
948 
949 /*
950  * Scsi_Host template entry slave_alloc
951  */
952 static int
bfad_im_slave_alloc(struct scsi_device * sdev)953 bfad_im_slave_alloc(struct scsi_device *sdev)
954 {
955 	struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
956 	struct bfad_itnim_data_s *itnim_data;
957 	struct bfa_s *bfa;
958 
959 	if (!rport || fc_remote_port_chkready(rport))
960 		return -ENXIO;
961 
962 	itnim_data = (struct bfad_itnim_data_s *) rport->dd_data;
963 	bfa = itnim_data->itnim->bfa_itnim->bfa;
964 
965 	if (bfa_get_lun_mask_status(bfa) == BFA_LUNMASK_ENABLED) {
966 		/*
967 		 * We should not mask LUN 0 - since this will translate
968 		 * to no LUN / TARGET for SCSI ml resulting no scan.
969 		 */
970 		if (sdev->lun == 0) {
971 			sdev->sdev_bflags |= BLIST_NOREPORTLUN |
972 					     BLIST_SPARSELUN;
973 			goto done;
974 		}
975 
976 		/*
977 		 * Query LUN Mask configuration - to expose this LUN
978 		 * to the SCSI mid-layer or to mask it.
979 		 */
980 		if (bfad_im_check_if_make_lun_visible(sdev, rport) !=
981 							BFA_STATUS_OK)
982 			return -ENXIO;
983 	}
984 done:
985 	sdev->hostdata = rport->dd_data;
986 
987 	return 0;
988 }
989 
990 u32
bfad_im_supported_speeds(struct bfa_s * bfa)991 bfad_im_supported_speeds(struct bfa_s *bfa)
992 {
993 	struct bfa_ioc_attr_s *ioc_attr;
994 	u32 supported_speed = 0;
995 
996 	ioc_attr = kzalloc(sizeof(struct bfa_ioc_attr_s), GFP_KERNEL);
997 	if (!ioc_attr)
998 		return 0;
999 
1000 	bfa_ioc_get_attr(&bfa->ioc, ioc_attr);
1001 	if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_16GBPS)
1002 		supported_speed |=  FC_PORTSPEED_16GBIT | FC_PORTSPEED_8GBIT |
1003 				FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT;
1004 	else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_8GBPS) {
1005 		if (ioc_attr->adapter_attr.is_mezz) {
1006 			supported_speed |= FC_PORTSPEED_8GBIT |
1007 				FC_PORTSPEED_4GBIT |
1008 				FC_PORTSPEED_2GBIT | FC_PORTSPEED_1GBIT;
1009 		} else {
1010 			supported_speed |= FC_PORTSPEED_8GBIT |
1011 				FC_PORTSPEED_4GBIT |
1012 				FC_PORTSPEED_2GBIT;
1013 		}
1014 	} else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_4GBPS) {
1015 		supported_speed |=  FC_PORTSPEED_4GBIT | FC_PORTSPEED_2GBIT |
1016 				FC_PORTSPEED_1GBIT;
1017 	} else if (ioc_attr->adapter_attr.max_speed == BFA_PORT_SPEED_10GBPS) {
1018 		supported_speed |= FC_PORTSPEED_10GBIT;
1019 	}
1020 	kfree(ioc_attr);
1021 	return supported_speed;
1022 }
1023 
1024 void
bfad_fc_host_init(struct bfad_im_port_s * im_port)1025 bfad_fc_host_init(struct bfad_im_port_s *im_port)
1026 {
1027 	struct Scsi_Host *host = im_port->shost;
1028 	struct bfad_s         *bfad = im_port->bfad;
1029 	struct bfad_port_s    *port = im_port->port;
1030 	char symname[BFA_SYMNAME_MAXLEN];
1031 	struct bfa_fcport_s *fcport = BFA_FCPORT_MOD(&bfad->bfa);
1032 
1033 	fc_host_node_name(host) =
1034 		cpu_to_be64((bfa_fcs_lport_get_nwwn(port->fcs_port)));
1035 	fc_host_port_name(host) =
1036 		cpu_to_be64((bfa_fcs_lport_get_pwwn(port->fcs_port)));
1037 	fc_host_max_npiv_vports(host) = bfa_lps_get_max_vport(&bfad->bfa);
1038 
1039 	fc_host_supported_classes(host) = FC_COS_CLASS3;
1040 
1041 	memset(fc_host_supported_fc4s(host), 0,
1042 	       sizeof(fc_host_supported_fc4s(host)));
1043 	if (supported_fc4s & BFA_LPORT_ROLE_FCP_IM)
1044 		/* For FCP type 0x08 */
1045 		fc_host_supported_fc4s(host)[2] = 1;
1046 	/* For fibre channel services type 0x20 */
1047 	fc_host_supported_fc4s(host)[7] = 1;
1048 
1049 	strlcpy(symname, bfad->bfa_fcs.fabric.bport.port_cfg.sym_name.symname,
1050 		BFA_SYMNAME_MAXLEN);
1051 	sprintf(fc_host_symbolic_name(host), "%s", symname);
1052 
1053 	fc_host_supported_speeds(host) = bfad_im_supported_speeds(&bfad->bfa);
1054 	fc_host_maxframe_size(host) = fcport->cfg.maxfrsize;
1055 }
1056 
1057 static void
bfad_im_fc_rport_add(struct bfad_im_port_s * im_port,struct bfad_itnim_s * itnim)1058 bfad_im_fc_rport_add(struct bfad_im_port_s *im_port, struct bfad_itnim_s *itnim)
1059 {
1060 	struct fc_rport_identifiers rport_ids;
1061 	struct fc_rport *fc_rport;
1062 	struct bfad_itnim_data_s *itnim_data;
1063 
1064 	rport_ids.node_name =
1065 		cpu_to_be64(bfa_fcs_itnim_get_nwwn(&itnim->fcs_itnim));
1066 	rport_ids.port_name =
1067 		cpu_to_be64(bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
1068 	rport_ids.port_id =
1069 		bfa_hton3b(bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim));
1070 	rport_ids.roles = FC_RPORT_ROLE_UNKNOWN;
1071 
1072 	itnim->fc_rport = fc_rport =
1073 		fc_remote_port_add(im_port->shost, 0, &rport_ids);
1074 
1075 	if (!fc_rport)
1076 		return;
1077 
1078 	fc_rport->maxframe_size =
1079 		bfa_fcs_itnim_get_maxfrsize(&itnim->fcs_itnim);
1080 	fc_rport->supported_classes = bfa_fcs_itnim_get_cos(&itnim->fcs_itnim);
1081 
1082 	itnim_data = fc_rport->dd_data;
1083 	itnim_data->itnim = itnim;
1084 
1085 	rport_ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
1086 
1087 	if (rport_ids.roles != FC_RPORT_ROLE_UNKNOWN)
1088 		fc_remote_port_rolechg(fc_rport, rport_ids.roles);
1089 
1090 	if ((fc_rport->scsi_target_id != -1)
1091 	    && (fc_rport->scsi_target_id < MAX_FCP_TARGET))
1092 		itnim->scsi_tgt_id = fc_rport->scsi_target_id;
1093 
1094 	itnim->channel = fc_rport->channel;
1095 
1096 	return;
1097 }
1098 
1099 /*
1100  * Work queue handler using FC transport service
1101 * Context: kernel
1102  */
1103 static void
bfad_im_itnim_work_handler(struct work_struct * work)1104 bfad_im_itnim_work_handler(struct work_struct *work)
1105 {
1106 	struct bfad_itnim_s   *itnim = container_of(work, struct bfad_itnim_s,
1107 							itnim_work);
1108 	struct bfad_im_s      *im = itnim->im;
1109 	struct bfad_s         *bfad = im->bfad;
1110 	struct bfad_im_port_s *im_port;
1111 	unsigned long   flags;
1112 	struct fc_rport *fc_rport;
1113 	wwn_t wwpn;
1114 	u32 fcid;
1115 	char wwpn_str[32], fcid_str[16];
1116 
1117 	spin_lock_irqsave(&bfad->bfad_lock, flags);
1118 	im_port = itnim->im_port;
1119 	bfa_trc(bfad, itnim->state);
1120 	switch (itnim->state) {
1121 	case ITNIM_STATE_ONLINE:
1122 		if (!itnim->fc_rport) {
1123 			spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1124 			bfad_im_fc_rport_add(im_port, itnim);
1125 			spin_lock_irqsave(&bfad->bfad_lock, flags);
1126 			wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1127 			fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1128 			wwn2str(wwpn_str, wwpn);
1129 			fcid2str(fcid_str, fcid);
1130 			list_add_tail(&itnim->list_entry,
1131 				&im_port->itnim_mapped_list);
1132 			BFA_LOG(KERN_INFO, bfad, bfa_log_level,
1133 				"ITNIM ONLINE Target: %d:0:%d "
1134 				"FCID: %s WWPN: %s\n",
1135 				im_port->shost->host_no,
1136 				itnim->scsi_tgt_id,
1137 				fcid_str, wwpn_str);
1138 		} else {
1139 			printk(KERN_WARNING
1140 				"%s: itnim %llx is already in online state\n",
1141 				__func__,
1142 				bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim));
1143 		}
1144 
1145 		break;
1146 	case ITNIM_STATE_OFFLINE_PENDING:
1147 		itnim->state = ITNIM_STATE_OFFLINE;
1148 		if (itnim->fc_rport) {
1149 			fc_rport = itnim->fc_rport;
1150 			((struct bfad_itnim_data_s *)
1151 				fc_rport->dd_data)->itnim = NULL;
1152 			itnim->fc_rport = NULL;
1153 			if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1154 				spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1155 				fc_rport->dev_loss_tmo =
1156 					bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1157 				fc_remote_port_delete(fc_rport);
1158 				spin_lock_irqsave(&bfad->bfad_lock, flags);
1159 			}
1160 			wwpn = bfa_fcs_itnim_get_pwwn(&itnim->fcs_itnim);
1161 			fcid = bfa_fcs_itnim_get_fcid(&itnim->fcs_itnim);
1162 			wwn2str(wwpn_str, wwpn);
1163 			fcid2str(fcid_str, fcid);
1164 			list_del(&itnim->list_entry);
1165 			BFA_LOG(KERN_INFO, bfad, bfa_log_level,
1166 				"ITNIM OFFLINE Target: %d:0:%d "
1167 				"FCID: %s WWPN: %s\n",
1168 				im_port->shost->host_no,
1169 				itnim->scsi_tgt_id,
1170 				fcid_str, wwpn_str);
1171 		}
1172 		break;
1173 	case ITNIM_STATE_FREE:
1174 		if (itnim->fc_rport) {
1175 			fc_rport = itnim->fc_rport;
1176 			((struct bfad_itnim_data_s *)
1177 				fc_rport->dd_data)->itnim = NULL;
1178 			itnim->fc_rport = NULL;
1179 			if (!(im_port->port->flags & BFAD_PORT_DELETE)) {
1180 				spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1181 				fc_rport->dev_loss_tmo =
1182 					bfa_fcpim_path_tov_get(&bfad->bfa) + 1;
1183 				fc_remote_port_delete(fc_rport);
1184 				spin_lock_irqsave(&bfad->bfad_lock, flags);
1185 			}
1186 			list_del(&itnim->list_entry);
1187 		}
1188 
1189 		kfree(itnim);
1190 		break;
1191 	default:
1192 		WARN_ON(1);
1193 		break;
1194 	}
1195 
1196 	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1197 }
1198 
1199 /*
1200  * Scsi_Host template entry, queue a SCSI command to the BFAD.
1201  */
bfad_im_queuecommand_lck(struct scsi_cmnd * cmnd)1202 static int bfad_im_queuecommand_lck(struct scsi_cmnd *cmnd)
1203 {
1204 	void (*done)(struct scsi_cmnd *) = scsi_done;
1205 	struct bfad_im_port_s *im_port =
1206 		(struct bfad_im_port_s *) cmnd->device->host->hostdata[0];
1207 	struct bfad_s         *bfad = im_port->bfad;
1208 	struct bfad_itnim_data_s *itnim_data = cmnd->device->hostdata;
1209 	struct bfad_itnim_s   *itnim;
1210 	struct bfa_ioim_s *hal_io;
1211 	unsigned long   flags;
1212 	int             rc;
1213 	int       sg_cnt = 0;
1214 	struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device));
1215 
1216 	rc = fc_remote_port_chkready(rport);
1217 	if (rc) {
1218 		cmnd->result = rc;
1219 		done(cmnd);
1220 		return 0;
1221 	}
1222 
1223 	if (bfad->bfad_flags & BFAD_EEH_BUSY) {
1224 		if (bfad->bfad_flags & BFAD_EEH_PCI_CHANNEL_IO_PERM_FAILURE)
1225 			cmnd->result = DID_NO_CONNECT << 16;
1226 		else
1227 			cmnd->result = DID_REQUEUE << 16;
1228 		done(cmnd);
1229 		return 0;
1230 	}
1231 
1232 	sg_cnt = scsi_dma_map(cmnd);
1233 	if (sg_cnt < 0)
1234 		return SCSI_MLQUEUE_HOST_BUSY;
1235 
1236 	spin_lock_irqsave(&bfad->bfad_lock, flags);
1237 	if (!(bfad->bfad_flags & BFAD_HAL_START_DONE)) {
1238 		printk(KERN_WARNING
1239 			"bfad%d, queuecommand %p %x failed, BFA stopped\n",
1240 		       bfad->inst_no, cmnd, cmnd->cmnd[0]);
1241 		cmnd->result = DID_NO_CONNECT << 16;
1242 		goto out_fail_cmd;
1243 	}
1244 
1245 
1246 	itnim = itnim_data->itnim;
1247 	if (!itnim) {
1248 		cmnd->result = DID_IMM_RETRY << 16;
1249 		goto out_fail_cmd;
1250 	}
1251 
1252 	hal_io = bfa_ioim_alloc(&bfad->bfa, (struct bfad_ioim_s *) cmnd,
1253 				    itnim->bfa_itnim, sg_cnt);
1254 	if (!hal_io) {
1255 		printk(KERN_WARNING "hal_io failure\n");
1256 		spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1257 		scsi_dma_unmap(cmnd);
1258 		return SCSI_MLQUEUE_HOST_BUSY;
1259 	}
1260 
1261 	cmnd->host_scribble = (char *)hal_io;
1262 	bfa_ioim_start(hal_io);
1263 	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1264 
1265 	return 0;
1266 
1267 out_fail_cmd:
1268 	spin_unlock_irqrestore(&bfad->bfad_lock, flags);
1269 	scsi_dma_unmap(cmnd);
1270 	if (done)
1271 		done(cmnd);
1272 
1273 	return 0;
1274 }
1275 
DEF_SCSI_QCMD(bfad_im_queuecommand)1276 static DEF_SCSI_QCMD(bfad_im_queuecommand)
1277 
1278 void
1279 bfad_rport_online_wait(struct bfad_s *bfad)
1280 {
1281 	int i;
1282 	int rport_delay = 10;
1283 
1284 	for (i = 0; !(bfad->bfad_flags & BFAD_PORT_ONLINE)
1285 		&& i < bfa_linkup_delay; i++) {
1286 		set_current_state(TASK_UNINTERRUPTIBLE);
1287 		schedule_timeout(HZ);
1288 	}
1289 
1290 	if (bfad->bfad_flags & BFAD_PORT_ONLINE) {
1291 		rport_delay = rport_delay < bfa_linkup_delay ?
1292 			rport_delay : bfa_linkup_delay;
1293 		for (i = 0; !(bfad->bfad_flags & BFAD_RPORT_ONLINE)
1294 			&& i < rport_delay; i++) {
1295 			set_current_state(TASK_UNINTERRUPTIBLE);
1296 			schedule_timeout(HZ);
1297 		}
1298 
1299 		if (rport_delay > 0 && (bfad->bfad_flags & BFAD_RPORT_ONLINE)) {
1300 			set_current_state(TASK_UNINTERRUPTIBLE);
1301 			schedule_timeout(rport_delay * HZ);
1302 		}
1303 	}
1304 }
1305 
1306 int
bfad_get_linkup_delay(struct bfad_s * bfad)1307 bfad_get_linkup_delay(struct bfad_s *bfad)
1308 {
1309 	u8		nwwns = 0;
1310 	wwn_t		wwns[BFA_PREBOOT_BOOTLUN_MAX];
1311 	int		linkup_delay;
1312 
1313 	/*
1314 	 * Querying for the boot target port wwns
1315 	 * -- read from boot information in flash.
1316 	 * If nwwns > 0 => boot over SAN and set linkup_delay = 30
1317 	 * else => local boot machine set linkup_delay = 0
1318 	 */
1319 
1320 	bfa_iocfc_get_bootwwns(&bfad->bfa, &nwwns, wwns);
1321 
1322 	if (nwwns > 0)
1323 		/* If Boot over SAN set linkup_delay = 30sec */
1324 		linkup_delay = 30;
1325 	else
1326 		/* If local boot; no linkup_delay */
1327 		linkup_delay = 0;
1328 
1329 	return linkup_delay;
1330 }
1331