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[deliverable/linux.git] / drivers / s390 / scsi / zfcp_aux.c
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1da177e4 1/*
4a9d2d8b
AH		 2 * This file is part of the zfcp device driver for
3 * FCP adapters for IBM System z9 and zSeries.
1da177e4 4 *
4a9d2d8b 5 * (C) Copyright IBM Corp. 2002, 2006
1da177e4
LT		 6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
4a9d2d8b
AH		 22/*
23 * Driver authors:
24 * Martin Peschke (originator of the driver)
25 * Raimund Schroeder
26 * Aron Zeh
27 * Wolfgang Taphorn
28 * Stefan Bader
29 * Heiko Carstens (kernel 2.6 port of the driver)
30 * Andreas Herrmann
31 * Maxim Shchetynin
32 * Volker Sameske
33 * Ralph Wuerthner
34 */
35
1da177e4
LT		 36#include "zfcp_ext.h"
37
38/* accumulated log level (module parameter) */
39static u32 loglevel = ZFCP_LOG_LEVEL_DEFAULTS;
40static char *device;
41/*********************** FUNCTION PROTOTYPES *********************************/
42
43/* written against the module interface */
44static int __init zfcp_module_init(void);
45
46/* FCP related */
47static void zfcp_ns_gid_pn_handler(unsigned long);
48
49/* miscellaneous */
4d284cac
HC		 50static int zfcp_sg_list_alloc(struct zfcp_sg_list *, size_t);
51static void zfcp_sg_list_free(struct zfcp_sg_list *);
52static int zfcp_sg_list_copy_from_user(struct zfcp_sg_list *,
53 void __user *, size_t);
54static int zfcp_sg_list_copy_to_user(void __user *,
55 struct zfcp_sg_list *, size_t);
bd6ae2f6 56static long zfcp_cfdc_dev_ioctl(struct file *, unsigned int, unsigned long);
1da177e4
LT		 57
58#define ZFCP_CFDC_IOC_MAGIC 0xDD
59#define ZFCP_CFDC_IOC \
60 _IOWR(ZFCP_CFDC_IOC_MAGIC, 0, struct zfcp_cfdc_sense_data)
61
1da177e4 62
d54b1fdb 63static const struct file_operations zfcp_cfdc_fops = {
e183b06b 64 .unlocked_ioctl = zfcp_cfdc_dev_ioctl,
65#ifdef CONFIG_COMPAT
66 .compat_ioctl = zfcp_cfdc_dev_ioctl
67#endif
1da177e4
LT		 68};
69
70static struct miscdevice zfcp_cfdc_misc = {
71 .minor = ZFCP_CFDC_DEV_MINOR,
72 .name = ZFCP_CFDC_DEV_NAME,
73 .fops = &zfcp_cfdc_fops
74};
75
76/*********************** KERNEL/MODULE PARAMETERS ***************************/
77
78/* declare driver module init/cleanup functions */
79module_init(zfcp_module_init);
80
4a9d2d8b 81MODULE_AUTHOR("IBM Deutschland Entwicklung GmbH - linux390@de.ibm.com");
1da177e4 82MODULE_DESCRIPTION
4a9d2d8b 83 ("FCP (SCSI over Fibre Channel) HBA driver for IBM System z9 and zSeries");
1da177e4
LT		 84MODULE_LICENSE("GPL");
85
6f71d9bc 86module_param(device, charp, 0400);
1da177e4
LT		 87MODULE_PARM_DESC(device, "specify initial device");
88
6f71d9bc 89module_param(loglevel, uint, 0400);
1da177e4
LT		 90MODULE_PARM_DESC(loglevel,
91 "log levels, 8 nibbles: "
92 "FC ERP QDIO CIO Config FSF SCSI Other, "
93 "levels: 0=none 1=normal 2=devel 3=trace");
94
1da177e4
LT		 95/****************************************************************/
96/************** Functions without logging ***********************/
97/****************************************************************/
98
99void
100_zfcp_hex_dump(char *addr, int count)
101{
102 int i;
103 for (i = 0; i < count; i++) {
104 printk("%02x", addr[i]);
105 if ((i % 4) == 3)
106 printk(" ");
107 if ((i % 32) == 31)
108 printk("\n");
109 }
110 if (((i-1) % 32) != 31)
111 printk("\n");
112}
113
fea9d6c7
VS		 114
115/****************************************************************/
116/****** Functions to handle the request ID hash table ********/
117/****************************************************************/
118
119#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF
120
ca2d02c2 121static int zfcp_reqlist_alloc(struct zfcp_adapter *adapter)
fea9d6c7 122{
ca2d02c2 123 int idx;
fea9d6c7
VS		 124
125 adapter->req_list = kcalloc(REQUEST_LIST_SIZE, sizeof(struct list_head),
126 GFP_KERNEL);
fea9d6c7
VS		 127 if (!adapter->req_list)
128 return -ENOMEM;
129
ca2d02c2
HC		 130 for (idx = 0; idx < REQUEST_LIST_SIZE; idx++)
131 INIT_LIST_HEAD(&adapter->req_list[idx]);
fea9d6c7
VS		 132 return 0;
133}
134
135static void zfcp_reqlist_free(struct zfcp_adapter *adapter)
136{
fea9d6c7
VS		 137 kfree(adapter->req_list);
138}
139
fea9d6c7
VS		 140int zfcp_reqlist_isempty(struct zfcp_adapter *adapter)
141{
ca2d02c2 142 unsigned int idx;
fea9d6c7 143
ca2d02c2
HC		 144 for (idx = 0; idx < REQUEST_LIST_SIZE; idx++)
145 if (!list_empty(&adapter->req_list[idx]))
fea9d6c7 146 return 0;
fea9d6c7
VS		 147 return 1;
148}
149
150#undef ZFCP_LOG_AREA
151
1da177e4
LT		 152/****************************************************************/
153/************** Uncategorised Functions *************************/
154/****************************************************************/
155
156#define ZFCP_LOG_AREA ZFCP_LOG_AREA_OTHER
157
1da177e4
LT		 158/**
159 * zfcp_device_setup - setup function
160 * @str: pointer to parameter string
161 *
162 * Parse "device=..." parameter string.
163 */
164static int __init
cd8a383e 165zfcp_device_setup(char *devstr)
1da177e4 166{
cd8a383e
AH		 167 char *tmp, *str;
168 size_t len;
1da177e4 169
cd8a383e 170 if (!devstr)
1da177e4
LT		 171 return 0;
172
cd8a383e 173 len = strlen(devstr) + 1;
5cbded58 174 str = kmalloc(len, GFP_KERNEL);
cd8a383e
AH		 175 if (!str)
176 goto err_out;
177 memcpy(str, devstr, len);
178
1da177e4
LT		 179 tmp = strchr(str, ',');
180 if (!tmp)
181 goto err_out;
182 *tmp++ = '\0';
183 strncpy(zfcp_data.init_busid, str, BUS_ID_SIZE);
184 zfcp_data.init_busid[BUS_ID_SIZE-1] = '\0';
185
186 zfcp_data.init_wwpn = simple_strtoull(tmp, &tmp, 0);
187 if (*tmp++ != ',')
188 goto err_out;
189 if (*tmp == '\0')
190 goto err_out;
191
192 zfcp_data.init_fcp_lun = simple_strtoull(tmp, &tmp, 0);
193 if (*tmp != '\0')
194 goto err_out;
cd8a383e 195 kfree(str);
1da177e4
LT		 196 return 1;
197
198 err_out:
199 ZFCP_LOG_NORMAL("Parse error for device parameter string %s\n", str);
cd8a383e 200 kfree(str);
1da177e4
LT		 201 return 0;
202}
203
204static void __init
205zfcp_init_device_configure(void)
206{
207 struct zfcp_adapter *adapter;
208 struct zfcp_port *port;
209 struct zfcp_unit *unit;
210
211 down(&zfcp_data.config_sema);
212 read_lock_irq(&zfcp_data.config_lock);
213 adapter = zfcp_get_adapter_by_busid(zfcp_data.init_busid);
214 if (adapter)
215 zfcp_adapter_get(adapter);
216 read_unlock_irq(&zfcp_data.config_lock);
217
218 if (adapter == NULL)
219 goto out_adapter;
220 port = zfcp_port_enqueue(adapter, zfcp_data.init_wwpn, 0, 0);
221 if (!port)
222 goto out_port;
223 unit = zfcp_unit_enqueue(port, zfcp_data.init_fcp_lun);
224 if (!unit)
225 goto out_unit;
226 up(&zfcp_data.config_sema);
227 ccw_device_set_online(adapter->ccw_device);
228 zfcp_erp_wait(adapter);
229 down(&zfcp_data.config_sema);
230 zfcp_unit_put(unit);
231 out_unit:
232 zfcp_port_put(port);
233 out_port:
234 zfcp_adapter_put(adapter);
235 out_adapter:
236 up(&zfcp_data.config_sema);
237 return;
238}
239
dd52e0ea
HC		 240static int calc_alignment(int size)
241{
242 int align = 1;
243
244 if (!size)
245 return 0;
246
247 while ((size - align) > 0)
248 align <<= 1;
249
250 return align;
251}
252
1da177e4
LT		 253static int __init
254zfcp_module_init(void)
255{
dd52e0ea
HC		 256 int retval = -ENOMEM;
257 int size, align;
258
259 size = sizeof(struct zfcp_fsf_req_qtcb);
260 align = calc_alignment(size);
261 zfcp_data.fsf_req_qtcb_cache =
20c2df83 262 kmem_cache_create("zfcp_fsf", size, align, 0, NULL);
dd52e0ea
HC		 263 if (!zfcp_data.fsf_req_qtcb_cache)
264 goto out;
1da177e4 265
dd52e0ea
HC		 266 size = sizeof(struct fsf_status_read_buffer);
267 align = calc_alignment(size);
268 zfcp_data.sr_buffer_cache =
20c2df83 269 kmem_cache_create("zfcp_sr", size, align, 0, NULL);
dd52e0ea
HC		 270 if (!zfcp_data.sr_buffer_cache)
271 goto out_sr_cache;
272
273 size = sizeof(struct zfcp_gid_pn_data);
274 align = calc_alignment(size);
275 zfcp_data.gid_pn_cache =
20c2df83 276 kmem_cache_create("zfcp_gid", size, align, 0, NULL);
dd52e0ea
HC		 277 if (!zfcp_data.gid_pn_cache)
278 goto out_gid_cache;
1da177e4
LT		 279
280 atomic_set(&zfcp_data.loglevel, loglevel);
281
282 /* initialize adapter list */
283 INIT_LIST_HEAD(&zfcp_data.adapter_list_head);
284
285 /* initialize adapters to be removed list head */
286 INIT_LIST_HEAD(&zfcp_data.adapter_remove_lh);
287
dd52e0ea
HC		 288 zfcp_data.scsi_transport_template =
289 fc_attach_transport(&zfcp_transport_functions);
290 if (!zfcp_data.scsi_transport_template)
291 goto out_transport;
1da177e4 292
1da177e4
LT		 293 retval = misc_register(&zfcp_cfdc_misc);
294 if (retval != 0) {
295 ZFCP_LOG_INFO("registration of misc device "
296 "zfcp_cfdc failed\n");
dd52e0ea 297 goto out_misc;
1da177e4
LT		 298 }
299
e183b06b 300 ZFCP_LOG_TRACE("major/minor for zfcp_cfdc: %d/%d\n",
301 ZFCP_CFDC_DEV_MAJOR, zfcp_cfdc_misc.minor);
302
1da177e4
LT		 303 /* Initialise proc semaphores */
304 sema_init(&zfcp_data.config_sema, 1);
305
306 /* initialise configuration rw lock */
307 rwlock_init(&zfcp_data.config_lock);
308
1da177e4
LT		 309 /* setup dynamic I/O */
310 retval = zfcp_ccw_register();
311 if (retval) {
312 ZFCP_LOG_NORMAL("registration with common I/O layer failed\n");
313 goto out_ccw_register;
314 }
315
316 if (zfcp_device_setup(device))
317 zfcp_init_device_configure();
318
319 goto out;
320
321 out_ccw_register:
322 misc_deregister(&zfcp_cfdc_misc);
dd52e0ea
HC		 323 out_misc:
324 fc_release_transport(zfcp_data.scsi_transport_template);
325 out_transport:
326 kmem_cache_destroy(zfcp_data.gid_pn_cache);
327 out_gid_cache:
328 kmem_cache_destroy(zfcp_data.sr_buffer_cache);
329 out_sr_cache:
330 kmem_cache_destroy(zfcp_data.fsf_req_qtcb_cache);
1da177e4
LT		 331 out:
332 return retval;
333}
334
335/*
336 * function: zfcp_cfdc_dev_ioctl
337 *
338 * purpose: Handle control file upload/download transaction via IOCTL
339 * interface
340 *
341 * returns: 0 - Operation completed successfuly
342 * -ENOTTY - Unknown IOCTL command
343 * -EINVAL - Invalid sense data record
344 * -ENXIO - The FCP adapter is not available
345 * -EOPNOTSUPP - The FCP adapter does not have CFDC support
346 * -ENOMEM - Insufficient memory
347 * -EFAULT - User space memory I/O operation fault
348 * -EPERM - Cannot create or queue FSF request or create SBALs
349 * -ERESTARTSYS- Received signal (is mapped to EAGAIN by VFS)
350 */
e183b06b 351static long
352zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command,
353 unsigned long buffer)
1da177e4
LT		 354{
355 struct zfcp_cfdc_sense_data *sense_data, __user *sense_data_user;
356 struct zfcp_adapter *adapter = NULL;
357 struct zfcp_fsf_req *fsf_req = NULL;
358 struct zfcp_sg_list *sg_list = NULL;
359 u32 fsf_command, option;
360 char *bus_id = NULL;
361 int retval = 0;
362
363 sense_data = kmalloc(sizeof(struct zfcp_cfdc_sense_data), GFP_KERNEL);
364 if (sense_data == NULL) {
365 retval = -ENOMEM;
366 goto out;
367 }
368
ec4081c6 369 sg_list = kzalloc(sizeof(struct zfcp_sg_list), GFP_KERNEL);
1da177e4
LT		 370 if (sg_list == NULL) {
371 retval = -ENOMEM;
372 goto out;
373 }
1da177e4
LT		 374
375 if (command != ZFCP_CFDC_IOC) {
376 ZFCP_LOG_INFO("IOC request code 0x%x invalid\n", command);
377 retval = -ENOTTY;
378 goto out;
379 }
380
381 if ((sense_data_user = (void __user *) buffer) == NULL) {
382 ZFCP_LOG_INFO("sense data record is required\n");
383 retval = -EINVAL;
384 goto out;
385 }
386
387 retval = copy_from_user(sense_data, sense_data_user,
388 sizeof(struct zfcp_cfdc_sense_data));
389 if (retval) {
390 retval = -EFAULT;
391 goto out;
392 }
393
394 if (sense_data->signature != ZFCP_CFDC_SIGNATURE) {
395 ZFCP_LOG_INFO("invalid sense data request signature 0x%08x\n",
396 ZFCP_CFDC_SIGNATURE);
397 retval = -EINVAL;
398 goto out;
399 }
400
401 switch (sense_data->command) {
402
403 case ZFCP_CFDC_CMND_DOWNLOAD_NORMAL:
404 fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
405 option = FSF_CFDC_OPTION_NORMAL_MODE;
406 break;
407
408 case ZFCP_CFDC_CMND_DOWNLOAD_FORCE:
409 fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
410 option = FSF_CFDC_OPTION_FORCE;
411 break;
412
413 case ZFCP_CFDC_CMND_FULL_ACCESS:
414 fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
415 option = FSF_CFDC_OPTION_FULL_ACCESS;
416 break;
417
418 case ZFCP_CFDC_CMND_RESTRICTED_ACCESS:
419 fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
420 option = FSF_CFDC_OPTION_RESTRICTED_ACCESS;
421 break;
422
423 case ZFCP_CFDC_CMND_UPLOAD:
424 fsf_command = FSF_QTCB_UPLOAD_CONTROL_FILE;
425 option = 0;
426 break;
427
428 default:
429 ZFCP_LOG_INFO("invalid command code 0x%08x\n",
430 sense_data->command);
431 retval = -EINVAL;
432 goto out;
433 }
434
435 bus_id = kmalloc(BUS_ID_SIZE, GFP_KERNEL);
436 if (bus_id == NULL) {
437 retval = -ENOMEM;
438 goto out;
439 }
440 snprintf(bus_id, BUS_ID_SIZE, "%d.%d.%04x",
441 (sense_data->devno >> 24),
442 (sense_data->devno >> 16) & 0xFF,
443 (sense_data->devno & 0xFFFF));
444
445 read_lock_irq(&zfcp_data.config_lock);
446 adapter = zfcp_get_adapter_by_busid(bus_id);
447 if (adapter)
448 zfcp_adapter_get(adapter);
449 read_unlock_irq(&zfcp_data.config_lock);
450
451 kfree(bus_id);
452
453 if (adapter == NULL) {
454 ZFCP_LOG_INFO("invalid adapter\n");
455 retval = -ENXIO;
456 goto out;
457 }
458
459 if (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE) {
460 retval = zfcp_sg_list_alloc(sg_list,
461 ZFCP_CFDC_MAX_CONTROL_FILE_SIZE);
462 if (retval) {
463 retval = -ENOMEM;
464 goto out;
465 }
466 }
467
468 if ((sense_data->command & ZFCP_CFDC_DOWNLOAD) &&
469 (sense_data->command & ZFCP_CFDC_WITH_CONTROL_FILE)) {
470 retval = zfcp_sg_list_copy_from_user(
471 sg_list, &sense_data_user->control_file,
472 ZFCP_CFDC_MAX_CONTROL_FILE_SIZE);
473 if (retval) {
474 retval = -EFAULT;
475 goto out;
476 }
477 }
478
479 retval = zfcp_fsf_control_file(adapter, &fsf_req, fsf_command,
480 option, sg_list);
481 if (retval)
482 goto out;
483
484 if ((fsf_req->qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
485 (fsf_req->qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
486 retval = -ENXIO;
487 goto out;
488 }
489
490 sense_data->fsf_status = fsf_req->qtcb->header.fsf_status;
491 memcpy(&sense_data->fsf_status_qual,
492 &fsf_req->qtcb->header.fsf_status_qual,
493 sizeof(union fsf_status_qual));
494 memcpy(&sense_data->payloads, &fsf_req->qtcb->bottom.support.els, 256);
495
496 retval = copy_to_user(sense_data_user, sense_data,
497 sizeof(struct zfcp_cfdc_sense_data));
498 if (retval) {
499 retval = -EFAULT;
500 goto out;
501 }
502
503 if (sense_data->command & ZFCP_CFDC_UPLOAD) {
504 retval = zfcp_sg_list_copy_to_user(
505 &sense_data_user->control_file, sg_list,
506 ZFCP_CFDC_MAX_CONTROL_FILE_SIZE);
507 if (retval) {
508 retval = -EFAULT;
509 goto out;
510 }
511 }
512
513 out:
514 if (fsf_req != NULL)
1db2c9c0 515 zfcp_fsf_req_free(fsf_req);
1da177e4
LT		 516
517 if ((adapter != NULL) && (retval != -ENXIO))
518 zfcp_adapter_put(adapter);
519
520 if (sg_list != NULL) {
521 zfcp_sg_list_free(sg_list);
522 kfree(sg_list);
523 }
524
17fd682e 525 kfree(sense_data);
1da177e4
LT		 526
527 return retval;
528}
529
530
531/**
532 * zfcp_sg_list_alloc - create a scatter-gather list of the specified size
533 * @sg_list: structure describing a scatter gather list
534 * @size: size of scatter-gather list
535 * Return: 0 on success, else -ENOMEM
536 *
537 * In sg_list->sg a pointer to the created scatter-gather list is returned,
538 * or NULL if we run out of memory. sg_list->count specifies the number of
539 * elements of the scatter-gather list. The maximum size of a single element
540 * in the scatter-gather list is PAGE_SIZE.
541 */
4d284cac 542static int
1da177e4
LT		 543zfcp_sg_list_alloc(struct zfcp_sg_list *sg_list, size_t size)
544{
545 struct scatterlist *sg;
546 unsigned int i;
547 int retval = 0;
548 void *address;
549
550 BUG_ON(sg_list == NULL);
551
552 sg_list->count = size >> PAGE_SHIFT;
553 if (size & ~PAGE_MASK)
554 sg_list->count++;
ec4081c6 555 sg_list->sg = kcalloc(sg_list->count, sizeof(struct scatterlist),
1da177e4
LT		 556 GFP_KERNEL);
557 if (sg_list->sg == NULL) {
558 sg_list->count = 0;
559 retval = -ENOMEM;
560 goto out;
561 }
73fc4f0d 562 sg_init_table(sg_list->sg, sg_list->count);
1da177e4
LT		 563
564 for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++) {
565 sg->length = min(size, PAGE_SIZE);
566 sg->offset = 0;
567 address = (void *) get_zeroed_page(GFP_KERNEL);
568 if (address == NULL) {
569 sg_list->count = i;
570 zfcp_sg_list_free(sg_list);
571 retval = -ENOMEM;
572 goto out;
573 }
574 zfcp_address_to_sg(address, sg);
575 size -= sg->length;
576 }
577
578 out:
579 return retval;
580}
581
582
583/**
584 * zfcp_sg_list_free - free memory of a scatter-gather list
585 * @sg_list: structure describing a scatter-gather list
586 *
587 * Memory for each element in the scatter-gather list is freed.
588 * Finally sg_list->sg is freed itself and sg_list->count is reset.
589 */
4d284cac 590static void
1da177e4
LT		 591zfcp_sg_list_free(struct zfcp_sg_list *sg_list)
592{
593 struct scatterlist *sg;
594 unsigned int i;
595
596 BUG_ON(sg_list == NULL);
597
598 for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++)
599 free_page((unsigned long) zfcp_sg_to_address(sg));
600
601 sg_list->count = 0;
602 kfree(sg_list->sg);
603}
604
605/**
606 * zfcp_sg_size - determine size of a scatter-gather list
607 * @sg: array of (struct scatterlist)
608 * @sg_count: elements in array
609 * Return: size of entire scatter-gather list
610 */
763968e2 611static size_t zfcp_sg_size(struct scatterlist *sg, unsigned int sg_count)
1da177e4
LT		 612{
613 unsigned int i;
614 struct scatterlist *p;
615 size_t size;
616
617 size = 0;
618 for (i = 0, p = sg; i < sg_count; i++, p++) {
619 BUG_ON(p == NULL);
620 size += p->length;
621 }
622
623 return size;
624}
625
626
627/**
628 * zfcp_sg_list_copy_from_user -copy data from user space to scatter-gather list
629 * @sg_list: structure describing a scatter-gather list
630 * @user_buffer: pointer to buffer in user space
631 * @size: number of bytes to be copied
632 * Return: 0 on success, -EFAULT if copy_from_user fails.
633 */
4d284cac 634static int
1da177e4
LT		 635zfcp_sg_list_copy_from_user(struct zfcp_sg_list *sg_list,
636 void __user *user_buffer,
637 size_t size)
638{
639 struct scatterlist *sg;
640 unsigned int length;
641 void *zfcp_buffer;
642 int retval = 0;
643
644 BUG_ON(sg_list == NULL);
645
646 if (zfcp_sg_size(sg_list->sg, sg_list->count) < size)
647 return -EFAULT;
648
649 for (sg = sg_list->sg; size > 0; sg++) {
650 length = min((unsigned int)size, sg->length);
651 zfcp_buffer = zfcp_sg_to_address(sg);
652 if (copy_from_user(zfcp_buffer, user_buffer, length)) {
653 retval = -EFAULT;
654 goto out;
655 }
656 user_buffer += length;
657 size -= length;
658 }
659
660 out:
661 return retval;
662}
663
664
665/**
666 * zfcp_sg_list_copy_to_user - copy data from scatter-gather list to user space
667 * @user_buffer: pointer to buffer in user space
668 * @sg_list: structure describing a scatter-gather list
669 * @size: number of bytes to be copied
670 * Return: 0 on success, -EFAULT if copy_to_user fails
671 */
4d284cac 672static int
1da177e4
LT		 673zfcp_sg_list_copy_to_user(void __user *user_buffer,
674 struct zfcp_sg_list *sg_list,
675 size_t size)
676{
677 struct scatterlist *sg;
678 unsigned int length;
679 void *zfcp_buffer;
680 int retval = 0;
681
682 BUG_ON(sg_list == NULL);
683
684 if (zfcp_sg_size(sg_list->sg, sg_list->count) < size)
685 return -EFAULT;
686
687 for (sg = sg_list->sg; size > 0; sg++) {
688 length = min((unsigned int) size, sg->length);
689 zfcp_buffer = zfcp_sg_to_address(sg);
690 if (copy_to_user(user_buffer, zfcp_buffer, length)) {
691 retval = -EFAULT;
692 goto out;
693 }
694 user_buffer += length;
695 size -= length;
696 }
697
698 out:
699 return retval;
700}
701
702
703#undef ZFCP_LOG_AREA
704
705/****************************************************************/
706/****** Functions for configuration/set-up of structures ********/
707/****************************************************************/
708
709#define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG
710
711/**
712 * zfcp_get_unit_by_lun - find unit in unit list of port by FCP LUN
713 * @port: pointer to port to search for unit
714 * @fcp_lun: FCP LUN to search for
715 * Traverse list of all units of a port and return pointer to a unit
716 * with the given FCP LUN.
717 */
718struct zfcp_unit *
719zfcp_get_unit_by_lun(struct zfcp_port *port, fcp_lun_t fcp_lun)
720{
721 struct zfcp_unit *unit;
722 int found = 0;
723
724 list_for_each_entry(unit, &port->unit_list_head, list) {
725 if ((unit->fcp_lun == fcp_lun) &&
726 !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status))
727 {
728 found = 1;
729 break;
730 }
731 }
732 return found ? unit : NULL;
733}
734
735/**
736 * zfcp_get_port_by_wwpn - find port in port list of adapter by wwpn
737 * @adapter: pointer to adapter to search for port
738 * @wwpn: wwpn to search for
739 * Traverse list of all ports of an adapter and return pointer to a port
740 * with the given wwpn.
741 */
742struct zfcp_port *
743zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, wwn_t wwpn)
744{
745 struct zfcp_port *port;
746 int found = 0;
747
748 list_for_each_entry(port, &adapter->port_list_head, list) {
749 if ((port->wwpn == wwpn) &&
750 !(atomic_read(&port->status) &
751 (ZFCP_STATUS_PORT_NO_WWPN | ZFCP_STATUS_COMMON_REMOVE))) {
752 found = 1;
753 break;
754 }
755 }
756 return found ? port : NULL;
757}
758
759/**
760 * zfcp_get_port_by_did - find port in port list of adapter by d_id
761 * @adapter: pointer to adapter to search for port
762 * @d_id: d_id to search for
763 * Traverse list of all ports of an adapter and return pointer to a port
764 * with the given d_id.
765 */
766struct zfcp_port *
767zfcp_get_port_by_did(struct zfcp_adapter *adapter, u32 d_id)
768{
769 struct zfcp_port *port;
770 int found = 0;
771
772 list_for_each_entry(port, &adapter->port_list_head, list) {
773 if ((port->d_id == d_id) &&
774 !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status))
775 {
776 found = 1;
777 break;
778 }
779 }
780 return found ? port : NULL;
781}
782
783/**
784 * zfcp_get_adapter_by_busid - find adpater in adapter list by bus_id
785 * @bus_id: bus_id to search for
786 * Traverse list of all adapters and return pointer to an adapter
787 * with the given bus_id.
788 */
789struct zfcp_adapter *
790zfcp_get_adapter_by_busid(char *bus_id)
791{
792 struct zfcp_adapter *adapter;
793 int found = 0;
794
795 list_for_each_entry(adapter, &zfcp_data.adapter_list_head, list) {
796 if ((strncmp(bus_id, zfcp_get_busid_by_adapter(adapter),
797 BUS_ID_SIZE) == 0) &&
798 !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE,
799 &adapter->status)){
800 found = 1;
801 break;
802 }
803 }
804 return found ? adapter : NULL;
805}
806
807/**
808 * zfcp_unit_enqueue - enqueue unit to unit list of a port.
809 * @port: pointer to port where unit is added
810 * @fcp_lun: FCP LUN of unit to be enqueued
811 * Return: pointer to enqueued unit on success, NULL on error
812 * Locks: config_sema must be held to serialize changes to the unit list
813 *
814 * Sets up some unit internal structures and creates sysfs entry.
815 */
816struct zfcp_unit *
817zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun)
818{
462b7859 819 struct zfcp_unit *unit;
1da177e4
LT		 820
821 /*
822 * check that there is no unit with this FCP_LUN already in list
823 * and enqueue it.
824 * Note: Unlike for the adapter and the port, this is an error
825 */
826 read_lock_irq(&zfcp_data.config_lock);
827 unit = zfcp_get_unit_by_lun(port, fcp_lun);
828 read_unlock_irq(&zfcp_data.config_lock);
829 if (unit)
830 return NULL;
831
ec4081c6 832 unit = kzalloc(sizeof (struct zfcp_unit), GFP_KERNEL);
1da177e4
LT		 833 if (!unit)
834 return NULL;
1da177e4
LT		 835
836 /* initialise reference count stuff */
837 atomic_set(&unit->refcount, 0);
838 init_waitqueue_head(&unit->remove_wq);
839
840 unit->port = port;
841 unit->fcp_lun = fcp_lun;
842
843 /* setup for sysfs registration */
844 snprintf(unit->sysfs_device.bus_id, BUS_ID_SIZE, "0x%016llx", fcp_lun);
845 unit->sysfs_device.parent = &port->sysfs_device;
846 unit->sysfs_device.release = zfcp_sysfs_unit_release;
847 dev_set_drvdata(&unit->sysfs_device, unit);
848
5f852be9
CS		 849 init_waitqueue_head(&unit->scsi_scan_wq);
850
1da177e4
LT		 851 /* mark unit unusable as long as sysfs registration is not complete */
852 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
853
854 if (device_register(&unit->sysfs_device)) {
855 kfree(unit);
856 return NULL;
857 }
858
859 if (zfcp_sysfs_unit_create_files(&unit->sysfs_device)) {
860 device_unregister(&unit->sysfs_device);
861 return NULL;
862 }
863
864 zfcp_unit_get(unit);
462b7859 865 unit->scsi_lun = scsilun_to_int((struct scsi_lun *)&unit->fcp_lun);
1da177e4 866
1da177e4 867 write_lock_irq(&zfcp_data.config_lock);
462b7859 868 list_add_tail(&unit->list, &port->unit_list_head);
1da177e4
LT		 869 atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
870 atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status);
871 write_unlock_irq(&zfcp_data.config_lock);
872
873 port->units++;
874 zfcp_port_get(port);
875
876 return unit;
877}
878
879void
880zfcp_unit_dequeue(struct zfcp_unit *unit)
881{
882 zfcp_unit_wait(unit);
883 write_lock_irq(&zfcp_data.config_lock);
884 list_del(&unit->list);
885 write_unlock_irq(&zfcp_data.config_lock);
886 unit->port->units--;
887 zfcp_port_put(unit->port);
888 zfcp_sysfs_unit_remove_files(&unit->sysfs_device);
889 device_unregister(&unit->sysfs_device);
890}
891
1da177e4
LT		 892/*
893 * Allocates a combined QTCB/fsf_req buffer for erp actions and fcp/SCSI
894 * commands.
41fa2ada 895 * It also genrates fcp-nameserver request/response buffer and unsolicited
1da177e4
LT		 896 * status read fsf_req buffers.
897 *
898 * locks: must only be called with zfcp_data.config_sema taken
899 */
900static int
901zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter)
902{
903 adapter->pool.fsf_req_erp =
dd52e0ea
HC		 904 mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ERP_NR,
905 zfcp_data.fsf_req_qtcb_cache);
0eaae62a 906 if (!adapter->pool.fsf_req_erp)
1da177e4
LT		 907 return -ENOMEM;
908
909 adapter->pool.fsf_req_scsi =
dd52e0ea
HC		 910 mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_SCSI_NR,
911 zfcp_data.fsf_req_qtcb_cache);
0eaae62a 912 if (!adapter->pool.fsf_req_scsi)
1da177e4
LT		 913 return -ENOMEM;
914
915 adapter->pool.fsf_req_abort =
dd52e0ea
HC		 916 mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ABORT_NR,
917 zfcp_data.fsf_req_qtcb_cache);
0eaae62a 918 if (!adapter->pool.fsf_req_abort)
1da177e4
LT		 919 return -ENOMEM;
920
921 adapter->pool.fsf_req_status_read =
0eaae62a
MD		 922 mempool_create_kmalloc_pool(ZFCP_POOL_STATUS_READ_NR,
923 sizeof(struct zfcp_fsf_req));
924 if (!adapter->pool.fsf_req_status_read)
1da177e4
LT		 925 return -ENOMEM;
926
927 adapter->pool.data_status_read =
dd52e0ea
HC		 928 mempool_create_slab_pool(ZFCP_POOL_STATUS_READ_NR,
929 zfcp_data.sr_buffer_cache);
0eaae62a 930 if (!adapter->pool.data_status_read)
1da177e4
LT		 931 return -ENOMEM;
932
933 adapter->pool.data_gid_pn =
dd52e0ea
HC		 934 mempool_create_slab_pool(ZFCP_POOL_DATA_GID_PN_NR,
935 zfcp_data.gid_pn_cache);
0eaae62a 936 if (!adapter->pool.data_gid_pn)
1da177e4
LT		 937 return -ENOMEM;
938
939 return 0;
940}
941
942/**
943 * zfcp_free_low_mem_buffers - free memory pools of an adapter
944 * @adapter: pointer to zfcp_adapter for which memory pools should be freed
945 * locking: zfcp_data.config_sema must be held
946 */
947static void
948zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter)
949{
950 if (adapter->pool.fsf_req_erp)
951 mempool_destroy(adapter->pool.fsf_req_erp);
952 if (adapter->pool.fsf_req_scsi)
953 mempool_destroy(adapter->pool.fsf_req_scsi);
954 if (adapter->pool.fsf_req_abort)
955 mempool_destroy(adapter->pool.fsf_req_abort);
956 if (adapter->pool.fsf_req_status_read)
957 mempool_destroy(adapter->pool.fsf_req_status_read);
958 if (adapter->pool.data_status_read)
959 mempool_destroy(adapter->pool.data_status_read);
960 if (adapter->pool.data_gid_pn)
961 mempool_destroy(adapter->pool.data_gid_pn);
962}
963
763968e2 964static void zfcp_dummy_release(struct device *dev)
1da177e4
LT		 965{
966 return;
967}
968
969/*
970 * Enqueues an adapter at the end of the adapter list in the driver data.
971 * All adapter internal structures are set up.
972 * Proc-fs entries are also created.
973 *
974 * returns: 0 if a new adapter was successfully enqueued
975 * ZFCP_KNOWN if an adapter with this devno was already present
976 * -ENOMEM if alloc failed
977 * locks: config_sema must be held to serialise changes to the adapter list
978 */
979struct zfcp_adapter *
980zfcp_adapter_enqueue(struct ccw_device *ccw_device)
981{
982 int retval = 0;
983 struct zfcp_adapter *adapter;
984
985 /*
41fa2ada 986 * Note: It is safe to release the list_lock, as any list changes
1da177e4
LT		 987 * are protected by the config_sema, which must be held to get here
988 */
989
990 /* try to allocate new adapter data structure (zeroed) */
ec4081c6 991 adapter = kzalloc(sizeof (struct zfcp_adapter), GFP_KERNEL);
1da177e4
LT		 992 if (!adapter) {
993 ZFCP_LOG_INFO("error: allocation of base adapter "
994 "structure failed\n");
995 goto out;
996 }
1da177e4
LT		 997
998 ccw_device->handler = NULL;
999
1000 /* save ccw_device pointer */
1001 adapter->ccw_device = ccw_device;
1002
1003 retval = zfcp_qdio_allocate_queues(adapter);
1004 if (retval)
1005 goto queues_alloc_failed;
1006
1007 retval = zfcp_qdio_allocate(adapter);
1008 if (retval)
1009 goto qdio_allocate_failed;
1010
1011 retval = zfcp_allocate_low_mem_buffers(adapter);
1012 if (retval) {
1013 ZFCP_LOG_INFO("error: pool allocation failed\n");
1014 goto failed_low_mem_buffers;
1015 }
1016
1017 /* initialise reference count stuff */
1018 atomic_set(&adapter->refcount, 0);
1019 init_waitqueue_head(&adapter->remove_wq);
1020
1021 /* initialise list of ports */
1022 INIT_LIST_HEAD(&adapter->port_list_head);
1023
1024 /* initialise list of ports to be removed */
1025 INIT_LIST_HEAD(&adapter->port_remove_lh);
1026
1027 /* initialize list of fsf requests */
fea9d6c7 1028 spin_lock_init(&adapter->req_list_lock);
ca2d02c2 1029 retval = zfcp_reqlist_alloc(adapter);
fea9d6c7
VS		 1030 if (retval) {
1031 ZFCP_LOG_INFO("request list initialization failed\n");
1032 goto failed_low_mem_buffers;
1033 }
1da177e4 1034
c48a29d0
HC		 1035 /* initialize debug locks */
1036
1037 spin_lock_init(&adapter->erp_dbf_lock);
1038 spin_lock_init(&adapter->hba_dbf_lock);
1039 spin_lock_init(&adapter->san_dbf_lock);
1040 spin_lock_init(&adapter->scsi_dbf_lock);
1041
ff17a29d
CS		 1042 retval = zfcp_adapter_debug_register(adapter);
1043 if (retval)
1044 goto debug_register_failed;
1045
c48a29d0
HC		 1046 /* initialize error recovery stuff */
1047
1048 rwlock_init(&adapter->erp_lock);
1049 sema_init(&adapter->erp_ready_sem, 0);
1050 INIT_LIST_HEAD(&adapter->erp_ready_head);
1051 INIT_LIST_HEAD(&adapter->erp_running_head);
1052
1da177e4
LT		 1053 /* initialize abort lock */
1054 rwlock_init(&adapter->abort_lock);
1055
1056 /* initialise some erp stuff */
1057 init_waitqueue_head(&adapter->erp_thread_wqh);
1058 init_waitqueue_head(&adapter->erp_done_wqh);
1059
1060 /* initialize lock of associated request queue */
1061 rwlock_init(&adapter->request_queue.queue_lock);
1062
1da177e4
LT		 1063 /* mark adapter unusable as long as sysfs registration is not complete */
1064 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
1065
1da177e4
LT		 1066 dev_set_drvdata(&ccw_device->dev, adapter);
1067
1068 if (zfcp_sysfs_adapter_create_files(&ccw_device->dev))
1069 goto sysfs_failed;
1070
1071 adapter->generic_services.parent = &adapter->ccw_device->dev;
1072 adapter->generic_services.release = zfcp_dummy_release;
1073 snprintf(adapter->generic_services.bus_id, BUS_ID_SIZE,
1074 "generic_services");
1075
1076 if (device_register(&adapter->generic_services))
1077 goto generic_services_failed;
1078
1079 /* put allocated adapter at list tail */
1080 write_lock_irq(&zfcp_data.config_lock);
1081 atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
1082 list_add_tail(&adapter->list, &zfcp_data.adapter_list_head);
1083 write_unlock_irq(&zfcp_data.config_lock);
1084
1085 zfcp_data.adapters++;
1086
1087 goto out;
1088
1089 generic_services_failed:
1090 zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev);
1091 sysfs_failed:
ff17a29d
CS		 1092 zfcp_adapter_debug_unregister(adapter);
1093 debug_register_failed:
1da177e4 1094 dev_set_drvdata(&ccw_device->dev, NULL);
ca2d02c2 1095 zfcp_reqlist_free(adapter);
1da177e4
LT		 1096 failed_low_mem_buffers:
1097 zfcp_free_low_mem_buffers(adapter);
1098 if (qdio_free(ccw_device) != 0)
1099 ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n",
1100 zfcp_get_busid_by_adapter(adapter));
1101 qdio_allocate_failed:
1102 zfcp_qdio_free_queues(adapter);
1103 queues_alloc_failed:
1104 kfree(adapter);
1105 adapter = NULL;
1106 out:
1107 return adapter;
1108}
1109
1110/*
1111 * returns: 0 - struct zfcp_adapter data structure successfully removed
1112 * !0 - struct zfcp_adapter data structure could not be removed
1113 * (e.g. still used)
1114 * locks: adapter list write lock is assumed to be held by caller
1da177e4
LT		 1115 */
1116void
1117zfcp_adapter_dequeue(struct zfcp_adapter *adapter)
1118{
1119 int retval = 0;
1120 unsigned long flags;
1121
9f28745a 1122 zfcp_adapter_scsi_unregister(adapter);
1da177e4
LT		 1123 device_unregister(&adapter->generic_services);
1124 zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev);
1125 dev_set_drvdata(&adapter->ccw_device->dev, NULL);
1126 /* sanity check: no pending FSF requests */
fea9d6c7
VS		 1127 spin_lock_irqsave(&adapter->req_list_lock, flags);
1128 retval = zfcp_reqlist_isempty(adapter);
1129 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
1130 if (!retval) {
1da177e4
LT		 1131 ZFCP_LOG_NORMAL("bug: adapter %s (%p) still in use, "
1132 "%i requests outstanding\n",
1133 zfcp_get_busid_by_adapter(adapter), adapter,
fea9d6c7 1134 atomic_read(&adapter->reqs_active));
1da177e4
LT		 1135 retval = -EBUSY;
1136 goto out;
1137 }
1138
ff17a29d
CS		 1139 zfcp_adapter_debug_unregister(adapter);
1140
1da177e4
LT		 1141 /* remove specified adapter data structure from list */
1142 write_lock_irq(&zfcp_data.config_lock);
1143 list_del(&adapter->list);
1144 write_unlock_irq(&zfcp_data.config_lock);
1145
1146 /* decrease number of adapters in list */
1147 zfcp_data.adapters--;
1148
1149 ZFCP_LOG_TRACE("adapter %s (%p) removed from list, "
1150 "%i adapters still in list\n",
1151 zfcp_get_busid_by_adapter(adapter),
1152 adapter, zfcp_data.adapters);
1153
1154 retval = qdio_free(adapter->ccw_device);
1155 if (retval)
1156 ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n",
1157 zfcp_get_busid_by_adapter(adapter));
1158
1159 zfcp_free_low_mem_buffers(adapter);
1160 /* free memory of adapter data structure and queues */
1161 zfcp_qdio_free_queues(adapter);
fea9d6c7 1162 zfcp_reqlist_free(adapter);
f6cd94b1
AH		 1163 kfree(adapter->fc_stats);
1164 kfree(adapter->stats_reset_data);
1da177e4
LT		 1165 ZFCP_LOG_TRACE("freeing adapter structure\n");
1166 kfree(adapter);
1167 out:
1168 return;
1169}
1170
1171/**
1172 * zfcp_port_enqueue - enqueue port to port list of adapter
1173 * @adapter: adapter where remote port is added
1174 * @wwpn: WWPN of the remote port to be enqueued
1175 * @status: initial status for the port
1176 * @d_id: destination id of the remote port to be enqueued
1177 * Return: pointer to enqueued port on success, NULL on error
1178 * Locks: config_sema must be held to serialize changes to the port list
1179 *
1180 * All port internal structures are set up and the sysfs entry is generated.
1181 * d_id is used to enqueue ports with a well known address like the Directory
1182 * Service for nameserver lookup.
1183 */
1184struct zfcp_port *
1185zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, u32 status,
1186 u32 d_id)
1187{
3859f6a2 1188 struct zfcp_port *port;
1da177e4 1189 int check_wwpn;
1da177e4
LT		 1190
1191 check_wwpn = !(status & ZFCP_STATUS_PORT_NO_WWPN);
1da177e4
LT		 1192 /*
1193 * check that there is no port with this WWPN already in list
1194 */
1195 if (check_wwpn) {
1196 read_lock_irq(&zfcp_data.config_lock);
1197 port = zfcp_get_port_by_wwpn(adapter, wwpn);
1198 read_unlock_irq(&zfcp_data.config_lock);
1199 if (port)
1200 return NULL;
1201 }
1202
ec4081c6 1203 port = kzalloc(sizeof (struct zfcp_port), GFP_KERNEL);
1da177e4
LT		 1204 if (!port)
1205 return NULL;
1da177e4
LT		 1206
1207 /* initialise reference count stuff */
1208 atomic_set(&port->refcount, 0);
1209 init_waitqueue_head(&port->remove_wq);
1210
1211 INIT_LIST_HEAD(&port->unit_list_head);
1212 INIT_LIST_HEAD(&port->unit_remove_lh);
1213
1214 port->adapter = adapter;
1215
1216 if (check_wwpn)
1217 port->wwpn = wwpn;
1218
1219 atomic_set_mask(status, &port->status);
1220
1221 /* setup for sysfs registration */
1222 if (status & ZFCP_STATUS_PORT_WKA) {
1223 switch (d_id) {
1224 case ZFCP_DID_DIRECTORY_SERVICE:
1225 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1226 "directory");
1227 break;
1228 case ZFCP_DID_MANAGEMENT_SERVICE:
1229 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1230 "management");
1231 break;
1232 case ZFCP_DID_KEY_DISTRIBUTION_SERVICE:
1233 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1234 "key_distribution");
1235 break;
1236 case ZFCP_DID_ALIAS_SERVICE:
1237 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1238 "alias");
1239 break;
1240 case ZFCP_DID_TIME_SERVICE:
1241 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1242 "time");
1243 break;
1244 default:
1245 kfree(port);
1246 return NULL;
1247 }
1248 port->d_id = d_id;
1249 port->sysfs_device.parent = &adapter->generic_services;
1250 } else {
1251 snprintf(port->sysfs_device.bus_id,
1252 BUS_ID_SIZE, "0x%016llx", wwpn);
3859f6a2 1253 port->sysfs_device.parent = &adapter->ccw_device->dev;
1da177e4
LT		 1254 }
1255 port->sysfs_device.release = zfcp_sysfs_port_release;
1256 dev_set_drvdata(&port->sysfs_device, port);
1257
1258 /* mark port unusable as long as sysfs registration is not complete */
1259 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
1260
1261 if (device_register(&port->sysfs_device)) {
1262 kfree(port);
1263 return NULL;
1264 }
1265
1266 if (zfcp_sysfs_port_create_files(&port->sysfs_device, status)) {
1267 device_unregister(&port->sysfs_device);
1268 return NULL;
1269 }
1270
1271 zfcp_port_get(port);
1272
1da177e4 1273 write_lock_irq(&zfcp_data.config_lock);
3859f6a2 1274 list_add_tail(&port->list, &adapter->port_list_head);
1da177e4
LT		 1275 atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
1276 atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &port->status);
1277 if (d_id == ZFCP_DID_DIRECTORY_SERVICE)
1278 if (!adapter->nameserver_port)
1279 adapter->nameserver_port = port;
1280 adapter->ports++;
1281 write_unlock_irq(&zfcp_data.config_lock);
1282
1283 zfcp_adapter_get(adapter);
1284
1285 return port;
1286}
1287
1288void
1289zfcp_port_dequeue(struct zfcp_port *port)
1290{
1291 zfcp_port_wait(port);
1292 write_lock_irq(&zfcp_data.config_lock);
1293 list_del(&port->list);
1294 port->adapter->ports--;
1295 write_unlock_irq(&zfcp_data.config_lock);
3859f6a2 1296 if (port->rport)
20b1730a
HC		 1297 fc_remote_port_delete(port->rport);
1298 port->rport = NULL;
1da177e4
LT		 1299 zfcp_adapter_put(port->adapter);
1300 zfcp_sysfs_port_remove_files(&port->sysfs_device,
1301 atomic_read(&port->status));
1302 device_unregister(&port->sysfs_device);
1303}
1304
1305/* Enqueues a nameserver port */
1306int
1307zfcp_nameserver_enqueue(struct zfcp_adapter *adapter)
1308{
1309 struct zfcp_port *port;
1310
1311 port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA,
1312 ZFCP_DID_DIRECTORY_SERVICE);
1313 if (!port) {
1314 ZFCP_LOG_INFO("error: enqueue of nameserver port for "
1315 "adapter %s failed\n",
1316 zfcp_get_busid_by_adapter(adapter));
1317 return -ENXIO;
1318 }
1319 zfcp_port_put(port);
1320
1321 return 0;
1322}
1323
1324#undef ZFCP_LOG_AREA
1325
1326/****************************************************************/
1327/******* Fibre Channel Standard related Functions **************/
1328/****************************************************************/
1329
1330#define ZFCP_LOG_AREA ZFCP_LOG_AREA_FC
1331
763968e2 1332static void
1da177e4
LT		 1333zfcp_fsf_incoming_els_rscn(struct zfcp_adapter *adapter,
1334 struct fsf_status_read_buffer *status_buffer)
1335{
1336 struct fcp_rscn_head *fcp_rscn_head;
1337 struct fcp_rscn_element *fcp_rscn_element;
1338 struct zfcp_port *port;
1339 u16 i;
1340 u16 no_entries;
1341 u32 range_mask;
1342 unsigned long flags;
1343
1344 fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload;
1345 fcp_rscn_element = (struct fcp_rscn_element *) status_buffer->payload;
1346
1347 /* see FC-FS */
1348 no_entries = (fcp_rscn_head->payload_len / 4);
1349
1da177e4
LT		 1350 for (i = 1; i < no_entries; i++) {
1351 /* skip head and start with 1st element */
1352 fcp_rscn_element++;
1353 switch (fcp_rscn_element->addr_format) {
1354 case ZFCP_PORT_ADDRESS:
1da177e4
LT		 1355 range_mask = ZFCP_PORTS_RANGE_PORT;
1356 break;
1357 case ZFCP_AREA_ADDRESS:
1da177e4
LT		 1358 range_mask = ZFCP_PORTS_RANGE_AREA;
1359 break;
1360 case ZFCP_DOMAIN_ADDRESS:
1da177e4
LT		 1361 range_mask = ZFCP_PORTS_RANGE_DOMAIN;
1362 break;
1363 case ZFCP_FABRIC_ADDRESS:
1da177e4
LT		 1364 range_mask = ZFCP_PORTS_RANGE_FABRIC;
1365 break;
1366 default:
1367 ZFCP_LOG_INFO("incoming RSCN with unknown "
1368 "address format\n");
1369 continue;
1370 }
1371 read_lock_irqsave(&zfcp_data.config_lock, flags);
1372 list_for_each_entry(port, &adapter->port_list_head, list) {
1373 if (atomic_test_mask
1374 (ZFCP_STATUS_PORT_WKA, &port->status))
1375 continue;
1376 /* Do we know this port? If not skip it. */
1377 if (!atomic_test_mask
1378 (ZFCP_STATUS_PORT_DID_DID, &port->status)) {
1379 ZFCP_LOG_INFO("incoming RSCN, trying to open "
1380 "port 0x%016Lx\n", port->wwpn);
1da177e4
LT		 1381 zfcp_erp_port_reopen(port,
1382 ZFCP_STATUS_COMMON_ERP_FAILED);
1383 continue;
1384 }
1385
1386 /*
1387 * FIXME: race: d_id might being invalidated
1388 * (...DID_DID reset)
1389 */
1390 if ((port->d_id & range_mask)
1391 == (fcp_rscn_element->nport_did & range_mask)) {
1392 ZFCP_LOG_TRACE("reopen did 0x%08x\n",
1393 fcp_rscn_element->nport_did);
1394 /*
1395 * Unfortunately, an RSCN does not specify the
1396 * type of change a target underwent. We assume
1397 * that it makes sense to reopen the link.
1398 * FIXME: Shall we try to find out more about
1399 * the target and link state before closing it?
1400 * How to accomplish this? (nameserver?)
1401 * Where would such code be put in?
1402 * (inside or outside erp)
1403 */
1404 ZFCP_LOG_INFO("incoming RSCN, trying to open "
1405 "port 0x%016Lx\n", port->wwpn);
1da177e4
LT		 1406 zfcp_test_link(port);
1407 }
1408 }
1409 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1410 }
1411}
1412
1413static void
1414zfcp_fsf_incoming_els_plogi(struct zfcp_adapter *adapter,
1415 struct fsf_status_read_buffer *status_buffer)
1416{
06506d00 1417 struct fsf_plogi *els_plogi;
1da177e4
LT		 1418 struct zfcp_port *port;
1419 unsigned long flags;
1420
06506d00 1421 els_plogi = (struct fsf_plogi *) status_buffer->payload;
1da177e4
LT		 1422 read_lock_irqsave(&zfcp_data.config_lock, flags);
1423 list_for_each_entry(port, &adapter->port_list_head, list) {
06506d00 1424 if (port->wwpn == (*(wwn_t *) &els_plogi->serv_param.wwpn))
1da177e4
LT		 1425 break;
1426 }
1427 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1428
06506d00 1429 if (!port || (port->wwpn != (*(wwn_t *) &els_plogi->serv_param.wwpn))) {
1da177e4 1430 ZFCP_LOG_DEBUG("ignored incoming PLOGI for nonexisting port "
1d589edf 1431 "with d_id 0x%06x on adapter %s\n",
1da177e4
LT		 1432 status_buffer->d_id,
1433 zfcp_get_busid_by_adapter(adapter));
1434 } else {
1da177e4
LT		 1435 zfcp_erp_port_forced_reopen(port, 0);
1436 }
1437}
1438
1439static void
1440zfcp_fsf_incoming_els_logo(struct zfcp_adapter *adapter,
1441 struct fsf_status_read_buffer *status_buffer)
1442{
1443 struct fcp_logo *els_logo = (struct fcp_logo *) status_buffer->payload;
1444 struct zfcp_port *port;
1445 unsigned long flags;
1446
1da177e4
LT		 1447 read_lock_irqsave(&zfcp_data.config_lock, flags);
1448 list_for_each_entry(port, &adapter->port_list_head, list) {
1449 if (port->wwpn == els_logo->nport_wwpn)
1450 break;
1451 }
1452 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1453
1454 if (!port || (port->wwpn != els_logo->nport_wwpn)) {
1455 ZFCP_LOG_DEBUG("ignored incoming LOGO for nonexisting port "
1d589edf 1456 "with d_id 0x%06x on adapter %s\n",
1da177e4
LT		 1457 status_buffer->d_id,
1458 zfcp_get_busid_by_adapter(adapter));
1459 } else {
1da177e4
LT		 1460 zfcp_erp_port_forced_reopen(port, 0);
1461 }
1462}
1463
1464static void
1465zfcp_fsf_incoming_els_unknown(struct zfcp_adapter *adapter,
1466 struct fsf_status_read_buffer *status_buffer)
1467{
1da177e4
LT		 1468 ZFCP_LOG_NORMAL("warning: unknown incoming ELS 0x%08x "
1469 "for adapter %s\n", *(u32 *) (status_buffer->payload),
1470 zfcp_get_busid_by_adapter(adapter));
1471
1472}
1473
1474void
1475zfcp_fsf_incoming_els(struct zfcp_fsf_req *fsf_req)
1476{
1477 struct fsf_status_read_buffer *status_buffer;
1478 u32 els_type;
1479 struct zfcp_adapter *adapter;
1480
059c97d0 1481 status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
1da177e4
LT		 1482 els_type = *(u32 *) (status_buffer->payload);
1483 adapter = fsf_req->adapter;
1484
8a36e453 1485 zfcp_san_dbf_event_incoming_els(fsf_req);
1da177e4
LT		 1486 if (els_type == LS_PLOGI)
1487 zfcp_fsf_incoming_els_plogi(adapter, status_buffer);
1488 else if (els_type == LS_LOGO)
1489 zfcp_fsf_incoming_els_logo(adapter, status_buffer);
1490 else if ((els_type & 0xffff0000) == LS_RSCN)
1491 /* we are only concerned with the command, not the length */
1492 zfcp_fsf_incoming_els_rscn(adapter, status_buffer);
1493 else
1494 zfcp_fsf_incoming_els_unknown(adapter, status_buffer);
1495}
1496
1497
1498/**
1499 * zfcp_gid_pn_buffers_alloc - allocate buffers for GID_PN nameserver request
1500 * @gid_pn: pointer to return pointer to struct zfcp_gid_pn_data
1501 * @pool: pointer to mempool_t if non-null memory pool is used for allocation
1502 */
1503static int
1504zfcp_gid_pn_buffers_alloc(struct zfcp_gid_pn_data **gid_pn, mempool_t *pool)
1505{
1506 struct zfcp_gid_pn_data *data;
1507
1508 if (pool != NULL) {
1509 data = mempool_alloc(pool, GFP_ATOMIC);
1510 if (likely(data != NULL)) {
1511 data->ct.pool = pool;
1512 }
1513 } else {
47b87b79 1514 data = kmem_cache_alloc(zfcp_data.gid_pn_cache, GFP_ATOMIC);
1da177e4
LT		 1515 }
1516
1517 if (NULL == data)
1518 return -ENOMEM;
1519
1520 memset(data, 0, sizeof(*data));
1521 data->ct.req = &data->req;
1522 data->ct.resp = &data->resp;
1523 data->ct.req_count = data->ct.resp_count = 1;
1524 zfcp_address_to_sg(&data->ct_iu_req, &data->req);
1525 zfcp_address_to_sg(&data->ct_iu_resp, &data->resp);
1526 data->req.length = sizeof(struct ct_iu_gid_pn_req);
1527 data->resp.length = sizeof(struct ct_iu_gid_pn_resp);
1528
1529 *gid_pn = data;
1530 return 0;
1531}
1532
1533/**
1534 * zfcp_gid_pn_buffers_free - free buffers for GID_PN nameserver request
1535 * @gid_pn: pointer to struct zfcp_gid_pn_data which has to be freed
1536 */
aa551daf 1537static void zfcp_gid_pn_buffers_free(struct zfcp_gid_pn_data *gid_pn)
1da177e4 1538{
aa551daf 1539 if (gid_pn->ct.pool)
1da177e4
LT		 1540 mempool_free(gid_pn, gid_pn->ct.pool);
1541 else
47b87b79 1542 kmem_cache_free(zfcp_data.gid_pn_cache, gid_pn);
1da177e4
LT		 1543}
1544
1545/**
1546 * zfcp_ns_gid_pn_request - initiate GID_PN nameserver request
1547 * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed
1548 */
1549int
1550zfcp_ns_gid_pn_request(struct zfcp_erp_action *erp_action)
1551{
1552 int ret;
1553 struct ct_iu_gid_pn_req *ct_iu_req;
1554 struct zfcp_gid_pn_data *gid_pn;
1555 struct zfcp_adapter *adapter = erp_action->adapter;
1556
1557 ret = zfcp_gid_pn_buffers_alloc(&gid_pn, adapter->pool.data_gid_pn);
1558 if (ret < 0) {
1559 ZFCP_LOG_INFO("error: buffer allocation for gid_pn nameserver "
1560 "request failed for adapter %s\n",
1561 zfcp_get_busid_by_adapter(adapter));
1562 goto out;
1563 }
1564
1565 /* setup nameserver request */
1566 ct_iu_req = zfcp_sg_to_address(gid_pn->ct.req);
1567 ct_iu_req->header.revision = ZFCP_CT_REVISION;
1568 ct_iu_req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE;
1569 ct_iu_req->header.gs_subtype = ZFCP_CT_NAME_SERVER;
1570 ct_iu_req->header.options = ZFCP_CT_SYNCHRONOUS;
1571 ct_iu_req->header.cmd_rsp_code = ZFCP_CT_GID_PN;
1572 ct_iu_req->header.max_res_size = ZFCP_CT_MAX_SIZE;
1573 ct_iu_req->wwpn = erp_action->port->wwpn;
1574
1575 /* setup parameters for send generic command */
1576 gid_pn->ct.port = adapter->nameserver_port;
1577 gid_pn->ct.handler = zfcp_ns_gid_pn_handler;
1578 gid_pn->ct.handler_data = (unsigned long) gid_pn;
1579 gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT;
1da177e4
LT		 1580 gid_pn->port = erp_action->port;
1581
1582 ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp,
1583 erp_action);
1584 if (ret) {
1585 ZFCP_LOG_INFO("error: initiation of gid_pn nameserver request "
1586 "failed for adapter %s\n",
1587 zfcp_get_busid_by_adapter(adapter));
1588
1589 zfcp_gid_pn_buffers_free(gid_pn);
1590 }
1591
1592 out:
1593 return ret;
1594}
1595
1596/**
1597 * zfcp_ns_gid_pn_handler - handler for GID_PN nameserver request
1598 * @data: unsigned long, contains pointer to struct zfcp_gid_pn_data
1599 */
1600static void zfcp_ns_gid_pn_handler(unsigned long data)
1601{
1602 struct zfcp_port *port;
1603 struct zfcp_send_ct *ct;
1604 struct ct_iu_gid_pn_req *ct_iu_req;
1605 struct ct_iu_gid_pn_resp *ct_iu_resp;
1606 struct zfcp_gid_pn_data *gid_pn;
1607
1608
1609 gid_pn = (struct zfcp_gid_pn_data *) data;
1610 port = gid_pn->port;
1611 ct = &gid_pn->ct;
1612 ct_iu_req = zfcp_sg_to_address(ct->req);
1613 ct_iu_resp = zfcp_sg_to_address(ct->resp);
1614
66c8684a
AH		 1615 if (ct->status != 0)
1616 goto failed;
1617
1618 if (zfcp_check_ct_response(&ct_iu_resp->header)) {
1da177e4
LT		 1619 /* FIXME: do we need some specific erp entry points */
1620 atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status);
1621 goto failed;
1622 }
1623 /* paranoia */
1624 if (ct_iu_req->wwpn != port->wwpn) {
1625 ZFCP_LOG_NORMAL("bug: wwpn 0x%016Lx returned by nameserver "
1626 "lookup does not match expected wwpn 0x%016Lx "
1627 "for adapter %s\n", ct_iu_req->wwpn, port->wwpn,
1628 zfcp_get_busid_by_port(port));
1629 goto mismatch;
1630 }
1631
1632 /* looks like a valid d_id */
1633 port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK;
1634 atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status);
1d589edf 1635 ZFCP_LOG_DEBUG("adapter %s: wwpn=0x%016Lx ---> d_id=0x%06x\n",
1da177e4
LT		 1636 zfcp_get_busid_by_port(port), port->wwpn, port->d_id);
1637 goto out;
1638
1639 mismatch:
1640 ZFCP_LOG_DEBUG("CT IUs do not match:\n");
1641 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_req,
1642 sizeof(struct ct_iu_gid_pn_req));
1643 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_resp,
1644 sizeof(struct ct_iu_gid_pn_resp));
1645
1646 failed:
1647 ZFCP_LOG_NORMAL("warning: failed gid_pn nameserver request for wwpn "
1648 "0x%016Lx for adapter %s\n",
1649 port->wwpn, zfcp_get_busid_by_port(port));
1650 out:
1651 zfcp_gid_pn_buffers_free(gid_pn);
1652 return;
1653}
1654
1655/* reject CT_IU reason codes acc. to FC-GS-4 */
1656static const struct zfcp_rc_entry zfcp_ct_rc[] = {
1657 {0x01, "invalid command code"},
1658 {0x02, "invalid version level"},
1659 {0x03, "logical error"},
1660 {0x04, "invalid CT_IU size"},
1661 {0x05, "logical busy"},
1662 {0x07, "protocol error"},
1663 {0x09, "unable to perform command request"},
1664 {0x0b, "command not supported"},
1665 {0x0d, "server not available"},
1666 {0x0e, "session could not be established"},
1667 {0xff, "vendor specific error"},
1668 {0, NULL},
1669};
1670
1671/* LS_RJT reason codes acc. to FC-FS */
1672static const struct zfcp_rc_entry zfcp_ls_rjt_rc[] = {
1673 {0x01, "invalid LS_Command code"},
1674 {0x03, "logical error"},
1675 {0x05, "logical busy"},
1676 {0x07, "protocol error"},
1677 {0x09, "unable to perform command request"},
1678 {0x0b, "command not supported"},
1679 {0x0e, "command already in progress"},
1680 {0xff, "vendor specific error"},
1681 {0, NULL},
1682};
1683
1684/* reject reason codes according to FC-PH/FC-FS */
1685static const struct zfcp_rc_entry zfcp_p_rjt_rc[] = {
1686 {0x01, "invalid D_ID"},
1687 {0x02, "invalid S_ID"},
1688 {0x03, "Nx_Port not available, temporary"},
1689 {0x04, "Nx_Port not available, permament"},
1690 {0x05, "class not supported"},
1691 {0x06, "delimiter usage error"},
1692 {0x07, "TYPE not supported"},
1693 {0x08, "invalid Link_Control"},
1694 {0x09, "invalid R_CTL field"},
1695 {0x0a, "invalid F_CTL field"},
1696 {0x0b, "invalid OX_ID"},
1697 {0x0c, "invalid RX_ID"},
1698 {0x0d, "invalid SEQ_ID"},
1699 {0x0e, "invalid DF_CTL"},
1700 {0x0f, "invalid SEQ_CNT"},
1701 {0x10, "invalid parameter field"},
1702 {0x11, "exchange error"},
1703 {0x12, "protocol error"},
1704 {0x13, "incorrect length"},
1705 {0x14, "unsupported ACK"},
1706 {0x15, "class of service not supported by entity at FFFFFE"},
1707 {0x16, "login required"},
1708 {0x17, "excessive sequences attempted"},
1709 {0x18, "unable to establish exchange"},
1710 {0x1a, "fabric path not available"},
1711 {0x1b, "invalid VC_ID (class 4)"},
1712 {0x1c, "invalid CS_CTL field"},
1713 {0x1d, "insufficient resources for VC (class 4)"},
1714 {0x1f, "invalid class of service"},
1715 {0x20, "preemption request rejected"},
1716 {0x21, "preemption not enabled"},
1717 {0x22, "multicast error"},
1718 {0x23, "multicast error terminate"},
1719 {0x24, "process login required"},
1720 {0xff, "vendor specific reject"},
1721 {0, NULL},
1722};
1723
1724/**
1725 * zfcp_rc_description - return description for given reaon code
1726 * @code: reason code
1727 * @rc_table: table of reason codes and descriptions
1728 */
4d284cac 1729static const char *
1da177e4
LT		 1730zfcp_rc_description(u8 code, const struct zfcp_rc_entry *rc_table)
1731{
1732 const char *descr = "unknown reason code";
1733
1734 do {
1735 if (code == rc_table->code) {
1736 descr = rc_table->description;
1737 break;
1738 }
1739 rc_table++;
1740 } while (rc_table->code && rc_table->description);
1741
1742 return descr;
1743}
1744
1745/**
1746 * zfcp_check_ct_response - evaluate reason code for CT_IU
1747 * @rjt: response payload to an CT_IU request
1748 * Return: 0 for accept CT_IU, 1 for reject CT_IU or invlid response code
1749 */
1750int
1751zfcp_check_ct_response(struct ct_hdr *rjt)
1752{
1753 if (rjt->cmd_rsp_code == ZFCP_CT_ACCEPT)
1754 return 0;
1755
1756 if (rjt->cmd_rsp_code != ZFCP_CT_REJECT) {
1757 ZFCP_LOG_NORMAL("error: invalid Generic Service command/"
1758 "response code (0x%04hx)\n",
1759 rjt->cmd_rsp_code);
1760 return 1;
1761 }
1762
1763 ZFCP_LOG_INFO("Generic Service command rejected\n");
1764 ZFCP_LOG_INFO("%s (0x%02x, 0x%02x, 0x%02x)\n",
1765 zfcp_rc_description(rjt->reason_code, zfcp_ct_rc),
1766 (u32) rjt->reason_code, (u32) rjt->reason_code_expl,
1767 (u32) rjt->vendor_unique);
1768
1769 return 1;
1770}
1771
1772/**
1773 * zfcp_print_els_rjt - print reject parameter and description for ELS reject
1774 * @rjt_par: reject parameter acc. to FC-PH/FC-FS
1775 * @rc_table: table of reason codes and descriptions
1776 */
4d284cac 1777static void
1da177e4
LT		 1778zfcp_print_els_rjt(struct zfcp_ls_rjt_par *rjt_par,
1779 const struct zfcp_rc_entry *rc_table)
1780{
1781 ZFCP_LOG_INFO("%s (%02x %02x %02x %02x)\n",
1782 zfcp_rc_description(rjt_par->reason_code, rc_table),
1783 (u32) rjt_par->action, (u32) rjt_par->reason_code,
1784 (u32) rjt_par->reason_expl, (u32) rjt_par->vendor_unique);
1785}
1786
1787/**
1788 * zfcp_fsf_handle_els_rjt - evaluate status qualifier/reason code on ELS reject
1789 * @sq: status qualifier word
1790 * @rjt_par: reject parameter as described in FC-PH and FC-FS
1791 * Return: -EROMTEIO for LS_RJT, -EREMCHG for invalid D_ID, -EIO else
1792 */
1793int
1794zfcp_handle_els_rjt(u32 sq, struct zfcp_ls_rjt_par *rjt_par)
1795{
1796 int ret = -EIO;
1797
1798 if (sq == FSF_IOSTAT_NPORT_RJT) {
1799 ZFCP_LOG_INFO("ELS rejected (P_RJT)\n");
1800 zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc);
1801 /* invalid d_id */
1802 if (rjt_par->reason_code == 0x01)
1803 ret = -EREMCHG;
1804 } else if (sq == FSF_IOSTAT_FABRIC_RJT) {
1805 ZFCP_LOG_INFO("ELS rejected (F_RJT)\n");
1806 zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc);
1807 /* invalid d_id */
1808 if (rjt_par->reason_code == 0x01)
1809 ret = -EREMCHG;
1810 } else if (sq == FSF_IOSTAT_LS_RJT) {
1811 ZFCP_LOG_INFO("ELS rejected (LS_RJT)\n");
1812 zfcp_print_els_rjt(rjt_par, zfcp_ls_rjt_rc);
1813 ret = -EREMOTEIO;
1814 } else
1815 ZFCP_LOG_INFO("unexpected SQ: 0x%02x\n", sq);
1816
1817 return ret;
1818}
1819
75bfc283
RW		 1820/**
1821 * zfcp_plogi_evaluate - evaluate PLOGI playload and copy important fields
1822 * into zfcp_port structure
1823 * @port: zfcp_port structure
1824 * @plogi: plogi payload
1825 */
1826void
1827zfcp_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi)
1828{
1829 port->maxframe_size = plogi->serv_param.common_serv_param[7] |
1830 ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8);
1831 if (plogi->serv_param.class1_serv_param[0] & 0x80)
1832 port->supported_classes |= FC_COS_CLASS1;
1833 if (plogi->serv_param.class2_serv_param[0] & 0x80)
1834 port->supported_classes |= FC_COS_CLASS2;
1835 if (plogi->serv_param.class3_serv_param[0] & 0x80)
1836 port->supported_classes |= FC_COS_CLASS3;
1837 if (plogi->serv_param.class4_serv_param[0] & 0x80)
1838 port->supported_classes |= FC_COS_CLASS4;
1839}
1840
1da177e4 1841#undef ZFCP_LOG_AREA
Linux kernel - Deliverables
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