2 * This file is part of the zfcp device driver for
3 * FCP adapters for IBM System z9 and zSeries.
5 * (C) Copyright IBM Corp. 2002, 2006
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)
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.
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.
24 * Martin Peschke (originator of the driver)
29 * Heiko Carstens (kernel 2.6 port of the driver)
38 /* accumulated log level (module parameter) */
39 static u32 loglevel
= ZFCP_LOG_LEVEL_DEFAULTS
;
41 /*********************** FUNCTION PROTOTYPES *********************************/
43 /* written against the module interface */
44 static int __init
zfcp_module_init(void);
47 static void zfcp_ns_gid_pn_handler(unsigned long);
50 static inline int zfcp_sg_list_alloc(struct zfcp_sg_list
*, size_t);
51 static inline void zfcp_sg_list_free(struct zfcp_sg_list
*);
52 static inline int zfcp_sg_list_copy_from_user(struct zfcp_sg_list
*,
53 void __user
*, size_t);
54 static inline int zfcp_sg_list_copy_to_user(void __user
*,
55 struct zfcp_sg_list
*, size_t);
57 static long zfcp_cfdc_dev_ioctl(struct file
*, unsigned int, unsigned long);
59 #define ZFCP_CFDC_IOC_MAGIC 0xDD
60 #define ZFCP_CFDC_IOC \
61 _IOWR(ZFCP_CFDC_IOC_MAGIC, 0, struct zfcp_cfdc_sense_data)
64 static struct file_operations zfcp_cfdc_fops
= {
65 .unlocked_ioctl
= zfcp_cfdc_dev_ioctl
,
67 .compat_ioctl
= zfcp_cfdc_dev_ioctl
71 static struct miscdevice zfcp_cfdc_misc
= {
72 .minor
= ZFCP_CFDC_DEV_MINOR
,
73 .name
= ZFCP_CFDC_DEV_NAME
,
74 .fops
= &zfcp_cfdc_fops
77 /*********************** KERNEL/MODULE PARAMETERS ***************************/
79 /* declare driver module init/cleanup functions */
80 module_init(zfcp_module_init
);
82 MODULE_AUTHOR("IBM Deutschland Entwicklung GmbH - linux390@de.ibm.com");
84 ("FCP (SCSI over Fibre Channel) HBA driver for IBM System z9 and zSeries");
85 MODULE_LICENSE("GPL");
87 module_param(device
, charp
, 0400);
88 MODULE_PARM_DESC(device
, "specify initial device");
90 module_param(loglevel
, uint
, 0400);
91 MODULE_PARM_DESC(loglevel
,
92 "log levels, 8 nibbles: "
93 "FC ERP QDIO CIO Config FSF SCSI Other, "
94 "levels: 0=none 1=normal 2=devel 3=trace");
96 /****************************************************************/
97 /************** Functions without logging ***********************/
98 /****************************************************************/
101 _zfcp_hex_dump(char *addr
, int count
)
104 for (i
= 0; i
< count
; i
++) {
105 printk("%02x", addr
[i
]);
111 if (((i
-1) % 32) != 31)
116 /****************************************************************/
117 /****** Functions to handle the request ID hash table ********/
118 /****************************************************************/
120 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF
122 static int zfcp_reqlist_init(struct zfcp_adapter
*adapter
)
126 adapter
->req_list
= kcalloc(REQUEST_LIST_SIZE
, sizeof(struct list_head
),
129 if (!adapter
->req_list
)
132 for (i
=0; i
<REQUEST_LIST_SIZE
; i
++)
133 INIT_LIST_HEAD(&adapter
->req_list
[i
]);
138 static void zfcp_reqlist_free(struct zfcp_adapter
*adapter
)
140 struct zfcp_fsf_req
*request
, *tmp
;
143 for (i
=0; i
<REQUEST_LIST_SIZE
; i
++) {
144 if (list_empty(&adapter
->req_list
[i
]))
147 list_for_each_entry_safe(request
, tmp
,
148 &adapter
->req_list
[i
], list
)
149 list_del(&request
->list
);
152 kfree(adapter
->req_list
);
155 void zfcp_reqlist_add(struct zfcp_adapter
*adapter
,
156 struct zfcp_fsf_req
*fsf_req
)
160 i
= fsf_req
->req_id
% REQUEST_LIST_SIZE
;
161 list_add_tail(&fsf_req
->list
, &adapter
->req_list
[i
]);
164 void zfcp_reqlist_remove(struct zfcp_adapter
*adapter
, unsigned long req_id
)
166 struct zfcp_fsf_req
*request
, *tmp
;
167 unsigned int i
, counter
;
170 i
= req_id
% REQUEST_LIST_SIZE
;
171 BUG_ON(list_empty(&adapter
->req_list
[i
]));
174 list_for_each_entry_safe(request
, tmp
, &adapter
->req_list
[i
], list
) {
175 if (request
->req_id
== req_id
) {
176 dbg_tmp
[0] = (u64
) atomic_read(&adapter
->reqs_active
);
177 dbg_tmp
[1] = (u64
) counter
;
178 debug_event(adapter
->erp_dbf
, 4, (void *) dbg_tmp
, 16);
179 list_del(&request
->list
);
186 struct zfcp_fsf_req
*zfcp_reqlist_ismember(struct zfcp_adapter
*adapter
,
187 unsigned long req_id
)
189 struct zfcp_fsf_req
*request
, *tmp
;
192 i
= req_id
% REQUEST_LIST_SIZE
;
194 list_for_each_entry_safe(request
, tmp
, &adapter
->req_list
[i
], list
)
195 if (request
->req_id
== req_id
)
201 int zfcp_reqlist_isempty(struct zfcp_adapter
*adapter
)
205 for (i
=0; i
<REQUEST_LIST_SIZE
; i
++)
206 if (!list_empty(&adapter
->req_list
[i
]))
214 /****************************************************************/
215 /************** Uncategorised Functions *************************/
216 /****************************************************************/
218 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_OTHER
221 * zfcp_device_setup - setup function
222 * @str: pointer to parameter string
224 * Parse "device=..." parameter string.
227 zfcp_device_setup(char *devstr
)
235 len
= strlen(devstr
) + 1;
236 str
= (char *) kmalloc(len
, GFP_KERNEL
);
239 memcpy(str
, devstr
, len
);
241 tmp
= strchr(str
, ',');
245 strncpy(zfcp_data
.init_busid
, str
, BUS_ID_SIZE
);
246 zfcp_data
.init_busid
[BUS_ID_SIZE
-1] = '\0';
248 zfcp_data
.init_wwpn
= simple_strtoull(tmp
, &tmp
, 0);
254 zfcp_data
.init_fcp_lun
= simple_strtoull(tmp
, &tmp
, 0);
261 ZFCP_LOG_NORMAL("Parse error for device parameter string %s\n", str
);
267 zfcp_init_device_configure(void)
269 struct zfcp_adapter
*adapter
;
270 struct zfcp_port
*port
;
271 struct zfcp_unit
*unit
;
273 down(&zfcp_data
.config_sema
);
274 read_lock_irq(&zfcp_data
.config_lock
);
275 adapter
= zfcp_get_adapter_by_busid(zfcp_data
.init_busid
);
277 zfcp_adapter_get(adapter
);
278 read_unlock_irq(&zfcp_data
.config_lock
);
282 port
= zfcp_port_enqueue(adapter
, zfcp_data
.init_wwpn
, 0, 0);
285 unit
= zfcp_unit_enqueue(port
, zfcp_data
.init_fcp_lun
);
288 up(&zfcp_data
.config_sema
);
289 ccw_device_set_online(adapter
->ccw_device
);
290 zfcp_erp_wait(adapter
);
291 down(&zfcp_data
.config_sema
);
296 zfcp_adapter_put(adapter
);
298 up(&zfcp_data
.config_sema
);
303 zfcp_module_init(void)
308 atomic_set(&zfcp_data
.loglevel
, loglevel
);
310 /* initialize adapter list */
311 INIT_LIST_HEAD(&zfcp_data
.adapter_list_head
);
313 /* initialize adapters to be removed list head */
314 INIT_LIST_HEAD(&zfcp_data
.adapter_remove_lh
);
316 zfcp_transport_template
= fc_attach_transport(&zfcp_transport_functions
);
317 if (!zfcp_transport_template
)
320 retval
= misc_register(&zfcp_cfdc_misc
);
322 ZFCP_LOG_INFO("registration of misc device "
323 "zfcp_cfdc failed\n");
327 ZFCP_LOG_TRACE("major/minor for zfcp_cfdc: %d/%d\n",
328 ZFCP_CFDC_DEV_MAJOR
, zfcp_cfdc_misc
.minor
);
330 /* Initialise proc semaphores */
331 sema_init(&zfcp_data
.config_sema
, 1);
333 /* initialise configuration rw lock */
334 rwlock_init(&zfcp_data
.config_lock
);
336 /* save address of data structure managing the driver module */
337 zfcp_data
.scsi_host_template
.module
= THIS_MODULE
;
339 /* setup dynamic I/O */
340 retval
= zfcp_ccw_register();
342 ZFCP_LOG_NORMAL("registration with common I/O layer failed\n");
343 goto out_ccw_register
;
346 if (zfcp_device_setup(device
))
347 zfcp_init_device_configure();
352 misc_deregister(&zfcp_cfdc_misc
);
358 * function: zfcp_cfdc_dev_ioctl
360 * purpose: Handle control file upload/download transaction via IOCTL
363 * returns: 0 - Operation completed successfuly
364 * -ENOTTY - Unknown IOCTL command
365 * -EINVAL - Invalid sense data record
366 * -ENXIO - The FCP adapter is not available
367 * -EOPNOTSUPP - The FCP adapter does not have CFDC support
368 * -ENOMEM - Insufficient memory
369 * -EFAULT - User space memory I/O operation fault
370 * -EPERM - Cannot create or queue FSF request or create SBALs
371 * -ERESTARTSYS- Received signal (is mapped to EAGAIN by VFS)
374 zfcp_cfdc_dev_ioctl(struct file
*file
, unsigned int command
,
375 unsigned long buffer
)
377 struct zfcp_cfdc_sense_data
*sense_data
, __user
*sense_data_user
;
378 struct zfcp_adapter
*adapter
= NULL
;
379 struct zfcp_fsf_req
*fsf_req
= NULL
;
380 struct zfcp_sg_list
*sg_list
= NULL
;
381 u32 fsf_command
, option
;
385 sense_data
= kmalloc(sizeof(struct zfcp_cfdc_sense_data
), GFP_KERNEL
);
386 if (sense_data
== NULL
) {
391 sg_list
= kzalloc(sizeof(struct zfcp_sg_list
), GFP_KERNEL
);
392 if (sg_list
== NULL
) {
397 if (command
!= ZFCP_CFDC_IOC
) {
398 ZFCP_LOG_INFO("IOC request code 0x%x invalid\n", command
);
403 if ((sense_data_user
= (void __user
*) buffer
) == NULL
) {
404 ZFCP_LOG_INFO("sense data record is required\n");
409 retval
= copy_from_user(sense_data
, sense_data_user
,
410 sizeof(struct zfcp_cfdc_sense_data
));
416 if (sense_data
->signature
!= ZFCP_CFDC_SIGNATURE
) {
417 ZFCP_LOG_INFO("invalid sense data request signature 0x%08x\n",
418 ZFCP_CFDC_SIGNATURE
);
423 switch (sense_data
->command
) {
425 case ZFCP_CFDC_CMND_DOWNLOAD_NORMAL
:
426 fsf_command
= FSF_QTCB_DOWNLOAD_CONTROL_FILE
;
427 option
= FSF_CFDC_OPTION_NORMAL_MODE
;
430 case ZFCP_CFDC_CMND_DOWNLOAD_FORCE
:
431 fsf_command
= FSF_QTCB_DOWNLOAD_CONTROL_FILE
;
432 option
= FSF_CFDC_OPTION_FORCE
;
435 case ZFCP_CFDC_CMND_FULL_ACCESS
:
436 fsf_command
= FSF_QTCB_DOWNLOAD_CONTROL_FILE
;
437 option
= FSF_CFDC_OPTION_FULL_ACCESS
;
440 case ZFCP_CFDC_CMND_RESTRICTED_ACCESS
:
441 fsf_command
= FSF_QTCB_DOWNLOAD_CONTROL_FILE
;
442 option
= FSF_CFDC_OPTION_RESTRICTED_ACCESS
;
445 case ZFCP_CFDC_CMND_UPLOAD
:
446 fsf_command
= FSF_QTCB_UPLOAD_CONTROL_FILE
;
451 ZFCP_LOG_INFO("invalid command code 0x%08x\n",
452 sense_data
->command
);
457 bus_id
= kmalloc(BUS_ID_SIZE
, GFP_KERNEL
);
458 if (bus_id
== NULL
) {
462 snprintf(bus_id
, BUS_ID_SIZE
, "%d.%d.%04x",
463 (sense_data
->devno
>> 24),
464 (sense_data
->devno
>> 16) & 0xFF,
465 (sense_data
->devno
& 0xFFFF));
467 read_lock_irq(&zfcp_data
.config_lock
);
468 adapter
= zfcp_get_adapter_by_busid(bus_id
);
470 zfcp_adapter_get(adapter
);
471 read_unlock_irq(&zfcp_data
.config_lock
);
475 if (adapter
== NULL
) {
476 ZFCP_LOG_INFO("invalid adapter\n");
481 if (sense_data
->command
& ZFCP_CFDC_WITH_CONTROL_FILE
) {
482 retval
= zfcp_sg_list_alloc(sg_list
,
483 ZFCP_CFDC_MAX_CONTROL_FILE_SIZE
);
490 if ((sense_data
->command
& ZFCP_CFDC_DOWNLOAD
) &&
491 (sense_data
->command
& ZFCP_CFDC_WITH_CONTROL_FILE
)) {
492 retval
= zfcp_sg_list_copy_from_user(
493 sg_list
, &sense_data_user
->control_file
,
494 ZFCP_CFDC_MAX_CONTROL_FILE_SIZE
);
501 retval
= zfcp_fsf_control_file(adapter
, &fsf_req
, fsf_command
,
506 if ((fsf_req
->qtcb
->prefix
.prot_status
!= FSF_PROT_GOOD
) &&
507 (fsf_req
->qtcb
->prefix
.prot_status
!= FSF_PROT_FSF_STATUS_PRESENTED
)) {
512 sense_data
->fsf_status
= fsf_req
->qtcb
->header
.fsf_status
;
513 memcpy(&sense_data
->fsf_status_qual
,
514 &fsf_req
->qtcb
->header
.fsf_status_qual
,
515 sizeof(union fsf_status_qual
));
516 memcpy(&sense_data
->payloads
, &fsf_req
->qtcb
->bottom
.support
.els
, 256);
518 retval
= copy_to_user(sense_data_user
, sense_data
,
519 sizeof(struct zfcp_cfdc_sense_data
));
525 if (sense_data
->command
& ZFCP_CFDC_UPLOAD
) {
526 retval
= zfcp_sg_list_copy_to_user(
527 &sense_data_user
->control_file
, sg_list
,
528 ZFCP_CFDC_MAX_CONTROL_FILE_SIZE
);
537 zfcp_fsf_req_free(fsf_req
);
539 if ((adapter
!= NULL
) && (retval
!= -ENXIO
))
540 zfcp_adapter_put(adapter
);
542 if (sg_list
!= NULL
) {
543 zfcp_sg_list_free(sg_list
);
554 * zfcp_sg_list_alloc - create a scatter-gather list of the specified size
555 * @sg_list: structure describing a scatter gather list
556 * @size: size of scatter-gather list
557 * Return: 0 on success, else -ENOMEM
559 * In sg_list->sg a pointer to the created scatter-gather list is returned,
560 * or NULL if we run out of memory. sg_list->count specifies the number of
561 * elements of the scatter-gather list. The maximum size of a single element
562 * in the scatter-gather list is PAGE_SIZE.
565 zfcp_sg_list_alloc(struct zfcp_sg_list
*sg_list
, size_t size
)
567 struct scatterlist
*sg
;
572 BUG_ON(sg_list
== NULL
);
574 sg_list
->count
= size
>> PAGE_SHIFT
;
575 if (size
& ~PAGE_MASK
)
577 sg_list
->sg
= kcalloc(sg_list
->count
, sizeof(struct scatterlist
),
579 if (sg_list
->sg
== NULL
) {
585 for (i
= 0, sg
= sg_list
->sg
; i
< sg_list
->count
; i
++, sg
++) {
586 sg
->length
= min(size
, PAGE_SIZE
);
588 address
= (void *) get_zeroed_page(GFP_KERNEL
);
589 if (address
== NULL
) {
591 zfcp_sg_list_free(sg_list
);
595 zfcp_address_to_sg(address
, sg
);
605 * zfcp_sg_list_free - free memory of a scatter-gather list
606 * @sg_list: structure describing a scatter-gather list
608 * Memory for each element in the scatter-gather list is freed.
609 * Finally sg_list->sg is freed itself and sg_list->count is reset.
612 zfcp_sg_list_free(struct zfcp_sg_list
*sg_list
)
614 struct scatterlist
*sg
;
617 BUG_ON(sg_list
== NULL
);
619 for (i
= 0, sg
= sg_list
->sg
; i
< sg_list
->count
; i
++, sg
++)
620 free_page((unsigned long) zfcp_sg_to_address(sg
));
627 * zfcp_sg_size - determine size of a scatter-gather list
628 * @sg: array of (struct scatterlist)
629 * @sg_count: elements in array
630 * Return: size of entire scatter-gather list
633 zfcp_sg_size(struct scatterlist
*sg
, unsigned int sg_count
)
636 struct scatterlist
*p
;
640 for (i
= 0, p
= sg
; i
< sg_count
; i
++, p
++) {
650 * zfcp_sg_list_copy_from_user -copy data from user space to scatter-gather list
651 * @sg_list: structure describing a scatter-gather list
652 * @user_buffer: pointer to buffer in user space
653 * @size: number of bytes to be copied
654 * Return: 0 on success, -EFAULT if copy_from_user fails.
657 zfcp_sg_list_copy_from_user(struct zfcp_sg_list
*sg_list
,
658 void __user
*user_buffer
,
661 struct scatterlist
*sg
;
666 BUG_ON(sg_list
== NULL
);
668 if (zfcp_sg_size(sg_list
->sg
, sg_list
->count
) < size
)
671 for (sg
= sg_list
->sg
; size
> 0; sg
++) {
672 length
= min((unsigned int)size
, sg
->length
);
673 zfcp_buffer
= zfcp_sg_to_address(sg
);
674 if (copy_from_user(zfcp_buffer
, user_buffer
, length
)) {
678 user_buffer
+= length
;
688 * zfcp_sg_list_copy_to_user - copy data from scatter-gather list to user space
689 * @user_buffer: pointer to buffer in user space
690 * @sg_list: structure describing a scatter-gather list
691 * @size: number of bytes to be copied
692 * Return: 0 on success, -EFAULT if copy_to_user fails
695 zfcp_sg_list_copy_to_user(void __user
*user_buffer
,
696 struct zfcp_sg_list
*sg_list
,
699 struct scatterlist
*sg
;
704 BUG_ON(sg_list
== NULL
);
706 if (zfcp_sg_size(sg_list
->sg
, sg_list
->count
) < size
)
709 for (sg
= sg_list
->sg
; size
> 0; sg
++) {
710 length
= min((unsigned int) size
, sg
->length
);
711 zfcp_buffer
= zfcp_sg_to_address(sg
);
712 if (copy_to_user(user_buffer
, zfcp_buffer
, length
)) {
716 user_buffer
+= length
;
727 /****************************************************************/
728 /****** Functions for configuration/set-up of structures ********/
729 /****************************************************************/
731 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG
734 * zfcp_get_unit_by_lun - find unit in unit list of port by FCP LUN
735 * @port: pointer to port to search for unit
736 * @fcp_lun: FCP LUN to search for
737 * Traverse list of all units of a port and return pointer to a unit
738 * with the given FCP LUN.
741 zfcp_get_unit_by_lun(struct zfcp_port
*port
, fcp_lun_t fcp_lun
)
743 struct zfcp_unit
*unit
;
746 list_for_each_entry(unit
, &port
->unit_list_head
, list
) {
747 if ((unit
->fcp_lun
== fcp_lun
) &&
748 !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE
, &unit
->status
))
754 return found
? unit
: NULL
;
758 * zfcp_get_port_by_wwpn - find port in port list of adapter by wwpn
759 * @adapter: pointer to adapter to search for port
760 * @wwpn: wwpn to search for
761 * Traverse list of all ports of an adapter and return pointer to a port
762 * with the given wwpn.
765 zfcp_get_port_by_wwpn(struct zfcp_adapter
*adapter
, wwn_t wwpn
)
767 struct zfcp_port
*port
;
770 list_for_each_entry(port
, &adapter
->port_list_head
, list
) {
771 if ((port
->wwpn
== wwpn
) &&
772 !(atomic_read(&port
->status
) &
773 (ZFCP_STATUS_PORT_NO_WWPN
| ZFCP_STATUS_COMMON_REMOVE
))) {
778 return found
? port
: NULL
;
782 * zfcp_get_port_by_did - find port in port list of adapter by d_id
783 * @adapter: pointer to adapter to search for port
784 * @d_id: d_id to search for
785 * Traverse list of all ports of an adapter and return pointer to a port
786 * with the given d_id.
789 zfcp_get_port_by_did(struct zfcp_adapter
*adapter
, u32 d_id
)
791 struct zfcp_port
*port
;
794 list_for_each_entry(port
, &adapter
->port_list_head
, list
) {
795 if ((port
->d_id
== d_id
) &&
796 !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE
, &port
->status
))
802 return found
? port
: NULL
;
806 * zfcp_get_adapter_by_busid - find adpater in adapter list by bus_id
807 * @bus_id: bus_id to search for
808 * Traverse list of all adapters and return pointer to an adapter
809 * with the given bus_id.
811 struct zfcp_adapter
*
812 zfcp_get_adapter_by_busid(char *bus_id
)
814 struct zfcp_adapter
*adapter
;
817 list_for_each_entry(adapter
, &zfcp_data
.adapter_list_head
, list
) {
818 if ((strncmp(bus_id
, zfcp_get_busid_by_adapter(adapter
),
819 BUS_ID_SIZE
) == 0) &&
820 !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE
,
826 return found
? adapter
: NULL
;
830 * zfcp_unit_enqueue - enqueue unit to unit list of a port.
831 * @port: pointer to port where unit is added
832 * @fcp_lun: FCP LUN of unit to be enqueued
833 * Return: pointer to enqueued unit on success, NULL on error
834 * Locks: config_sema must be held to serialize changes to the unit list
836 * Sets up some unit internal structures and creates sysfs entry.
839 zfcp_unit_enqueue(struct zfcp_port
*port
, fcp_lun_t fcp_lun
)
841 struct zfcp_unit
*unit
, *tmp_unit
;
842 unsigned int scsi_lun
;
846 * check that there is no unit with this FCP_LUN already in list
848 * Note: Unlike for the adapter and the port, this is an error
850 read_lock_irq(&zfcp_data
.config_lock
);
851 unit
= zfcp_get_unit_by_lun(port
, fcp_lun
);
852 read_unlock_irq(&zfcp_data
.config_lock
);
856 unit
= kzalloc(sizeof (struct zfcp_unit
), GFP_KERNEL
);
860 /* initialise reference count stuff */
861 atomic_set(&unit
->refcount
, 0);
862 init_waitqueue_head(&unit
->remove_wq
);
865 unit
->fcp_lun
= fcp_lun
;
867 /* setup for sysfs registration */
868 snprintf(unit
->sysfs_device
.bus_id
, BUS_ID_SIZE
, "0x%016llx", fcp_lun
);
869 unit
->sysfs_device
.parent
= &port
->sysfs_device
;
870 unit
->sysfs_device
.release
= zfcp_sysfs_unit_release
;
871 dev_set_drvdata(&unit
->sysfs_device
, unit
);
873 /* mark unit unusable as long as sysfs registration is not complete */
874 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE
, &unit
->status
);
876 if (device_register(&unit
->sysfs_device
)) {
881 if (zfcp_sysfs_unit_create_files(&unit
->sysfs_device
)) {
882 device_unregister(&unit
->sysfs_device
);
890 write_lock_irq(&zfcp_data
.config_lock
);
891 list_for_each_entry(tmp_unit
, &port
->unit_list_head
, list
) {
892 if (tmp_unit
->scsi_lun
!= scsi_lun
) {
898 unit
->scsi_lun
= scsi_lun
;
900 list_add_tail(&unit
->list
, &tmp_unit
->list
);
902 list_add_tail(&unit
->list
, &port
->unit_list_head
);
903 atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE
, &unit
->status
);
904 atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING
, &unit
->status
);
905 write_unlock_irq(&zfcp_data
.config_lock
);
914 zfcp_unit_dequeue(struct zfcp_unit
*unit
)
916 zfcp_unit_wait(unit
);
917 write_lock_irq(&zfcp_data
.config_lock
);
918 list_del(&unit
->list
);
919 write_unlock_irq(&zfcp_data
.config_lock
);
921 zfcp_port_put(unit
->port
);
922 zfcp_sysfs_unit_remove_files(&unit
->sysfs_device
);
923 device_unregister(&unit
->sysfs_device
);
927 * Allocates a combined QTCB/fsf_req buffer for erp actions and fcp/SCSI
929 * It also genrates fcp-nameserver request/response buffer and unsolicited
930 * status read fsf_req buffers.
932 * locks: must only be called with zfcp_data.config_sema taken
935 zfcp_allocate_low_mem_buffers(struct zfcp_adapter
*adapter
)
937 adapter
->pool
.fsf_req_erp
=
938 mempool_create_kmalloc_pool(ZFCP_POOL_FSF_REQ_ERP_NR
,
939 sizeof(struct zfcp_fsf_req_pool_element
));
940 if (!adapter
->pool
.fsf_req_erp
)
943 adapter
->pool
.fsf_req_scsi
=
944 mempool_create_kmalloc_pool(ZFCP_POOL_FSF_REQ_SCSI_NR
,
945 sizeof(struct zfcp_fsf_req_pool_element
));
946 if (!adapter
->pool
.fsf_req_scsi
)
949 adapter
->pool
.fsf_req_abort
=
950 mempool_create_kmalloc_pool(ZFCP_POOL_FSF_REQ_ABORT_NR
,
951 sizeof(struct zfcp_fsf_req_pool_element
));
952 if (!adapter
->pool
.fsf_req_abort
)
955 adapter
->pool
.fsf_req_status_read
=
956 mempool_create_kmalloc_pool(ZFCP_POOL_STATUS_READ_NR
,
957 sizeof(struct zfcp_fsf_req
));
958 if (!adapter
->pool
.fsf_req_status_read
)
961 adapter
->pool
.data_status_read
=
962 mempool_create_kmalloc_pool(ZFCP_POOL_STATUS_READ_NR
,
963 sizeof(struct fsf_status_read_buffer
));
964 if (!adapter
->pool
.data_status_read
)
967 adapter
->pool
.data_gid_pn
=
968 mempool_create_kmalloc_pool(ZFCP_POOL_DATA_GID_PN_NR
,
969 sizeof(struct zfcp_gid_pn_data
));
970 if (!adapter
->pool
.data_gid_pn
)
977 * zfcp_free_low_mem_buffers - free memory pools of an adapter
978 * @adapter: pointer to zfcp_adapter for which memory pools should be freed
979 * locking: zfcp_data.config_sema must be held
982 zfcp_free_low_mem_buffers(struct zfcp_adapter
*adapter
)
984 if (adapter
->pool
.fsf_req_erp
)
985 mempool_destroy(adapter
->pool
.fsf_req_erp
);
986 if (adapter
->pool
.fsf_req_scsi
)
987 mempool_destroy(adapter
->pool
.fsf_req_scsi
);
988 if (adapter
->pool
.fsf_req_abort
)
989 mempool_destroy(adapter
->pool
.fsf_req_abort
);
990 if (adapter
->pool
.fsf_req_status_read
)
991 mempool_destroy(adapter
->pool
.fsf_req_status_read
);
992 if (adapter
->pool
.data_status_read
)
993 mempool_destroy(adapter
->pool
.data_status_read
);
994 if (adapter
->pool
.data_gid_pn
)
995 mempool_destroy(adapter
->pool
.data_gid_pn
);
999 zfcp_dummy_release(struct device
*dev
)
1005 * Enqueues an adapter at the end of the adapter list in the driver data.
1006 * All adapter internal structures are set up.
1007 * Proc-fs entries are also created.
1009 * returns: 0 if a new adapter was successfully enqueued
1010 * ZFCP_KNOWN if an adapter with this devno was already present
1011 * -ENOMEM if alloc failed
1012 * locks: config_sema must be held to serialise changes to the adapter list
1014 struct zfcp_adapter
*
1015 zfcp_adapter_enqueue(struct ccw_device
*ccw_device
)
1018 struct zfcp_adapter
*adapter
;
1021 * Note: It is safe to release the list_lock, as any list changes
1022 * are protected by the config_sema, which must be held to get here
1025 /* try to allocate new adapter data structure (zeroed) */
1026 adapter
= kzalloc(sizeof (struct zfcp_adapter
), GFP_KERNEL
);
1028 ZFCP_LOG_INFO("error: allocation of base adapter "
1029 "structure failed\n");
1033 ccw_device
->handler
= NULL
;
1035 /* save ccw_device pointer */
1036 adapter
->ccw_device
= ccw_device
;
1038 retval
= zfcp_qdio_allocate_queues(adapter
);
1040 goto queues_alloc_failed
;
1042 retval
= zfcp_qdio_allocate(adapter
);
1044 goto qdio_allocate_failed
;
1046 retval
= zfcp_allocate_low_mem_buffers(adapter
);
1048 ZFCP_LOG_INFO("error: pool allocation failed\n");
1049 goto failed_low_mem_buffers
;
1052 /* initialise reference count stuff */
1053 atomic_set(&adapter
->refcount
, 0);
1054 init_waitqueue_head(&adapter
->remove_wq
);
1056 /* initialise list of ports */
1057 INIT_LIST_HEAD(&adapter
->port_list_head
);
1059 /* initialise list of ports to be removed */
1060 INIT_LIST_HEAD(&adapter
->port_remove_lh
);
1062 /* initialize list of fsf requests */
1063 spin_lock_init(&adapter
->req_list_lock
);
1064 retval
= zfcp_reqlist_init(adapter
);
1066 ZFCP_LOG_INFO("request list initialization failed\n");
1067 goto failed_low_mem_buffers
;
1070 /* initialize debug locks */
1072 spin_lock_init(&adapter
->erp_dbf_lock
);
1073 spin_lock_init(&adapter
->hba_dbf_lock
);
1074 spin_lock_init(&adapter
->san_dbf_lock
);
1075 spin_lock_init(&adapter
->scsi_dbf_lock
);
1077 /* initialize error recovery stuff */
1079 rwlock_init(&adapter
->erp_lock
);
1080 sema_init(&adapter
->erp_ready_sem
, 0);
1081 INIT_LIST_HEAD(&adapter
->erp_ready_head
);
1082 INIT_LIST_HEAD(&adapter
->erp_running_head
);
1084 /* initialize abort lock */
1085 rwlock_init(&adapter
->abort_lock
);
1087 /* initialise some erp stuff */
1088 init_waitqueue_head(&adapter
->erp_thread_wqh
);
1089 init_waitqueue_head(&adapter
->erp_done_wqh
);
1091 /* initialize lock of associated request queue */
1092 rwlock_init(&adapter
->request_queue
.queue_lock
);
1094 /* intitialise SCSI ER timer */
1095 init_timer(&adapter
->scsi_er_timer
);
1097 /* mark adapter unusable as long as sysfs registration is not complete */
1098 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE
, &adapter
->status
);
1100 adapter
->ccw_device
= ccw_device
;
1101 dev_set_drvdata(&ccw_device
->dev
, adapter
);
1103 if (zfcp_sysfs_adapter_create_files(&ccw_device
->dev
))
1106 adapter
->generic_services
.parent
= &adapter
->ccw_device
->dev
;
1107 adapter
->generic_services
.release
= zfcp_dummy_release
;
1108 snprintf(adapter
->generic_services
.bus_id
, BUS_ID_SIZE
,
1109 "generic_services");
1111 if (device_register(&adapter
->generic_services
))
1112 goto generic_services_failed
;
1114 /* put allocated adapter at list tail */
1115 write_lock_irq(&zfcp_data
.config_lock
);
1116 atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE
, &adapter
->status
);
1117 list_add_tail(&adapter
->list
, &zfcp_data
.adapter_list_head
);
1118 write_unlock_irq(&zfcp_data
.config_lock
);
1120 zfcp_data
.adapters
++;
1124 generic_services_failed
:
1125 zfcp_sysfs_adapter_remove_files(&adapter
->ccw_device
->dev
);
1127 dev_set_drvdata(&ccw_device
->dev
, NULL
);
1128 failed_low_mem_buffers
:
1129 zfcp_free_low_mem_buffers(adapter
);
1130 if (qdio_free(ccw_device
) != 0)
1131 ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n",
1132 zfcp_get_busid_by_adapter(adapter
));
1133 qdio_allocate_failed
:
1134 zfcp_qdio_free_queues(adapter
);
1135 queues_alloc_failed
:
1143 * returns: 0 - struct zfcp_adapter data structure successfully removed
1144 * !0 - struct zfcp_adapter data structure could not be removed
1146 * locks: adapter list write lock is assumed to be held by caller
1149 zfcp_adapter_dequeue(struct zfcp_adapter
*adapter
)
1152 unsigned long flags
;
1154 device_unregister(&adapter
->generic_services
);
1155 zfcp_sysfs_adapter_remove_files(&adapter
->ccw_device
->dev
);
1156 dev_set_drvdata(&adapter
->ccw_device
->dev
, NULL
);
1157 /* sanity check: no pending FSF requests */
1158 spin_lock_irqsave(&adapter
->req_list_lock
, flags
);
1159 retval
= zfcp_reqlist_isempty(adapter
);
1160 spin_unlock_irqrestore(&adapter
->req_list_lock
, flags
);
1162 ZFCP_LOG_NORMAL("bug: adapter %s (%p) still in use, "
1163 "%i requests outstanding\n",
1164 zfcp_get_busid_by_adapter(adapter
), adapter
,
1165 atomic_read(&adapter
->reqs_active
));
1170 /* remove specified adapter data structure from list */
1171 write_lock_irq(&zfcp_data
.config_lock
);
1172 list_del(&adapter
->list
);
1173 write_unlock_irq(&zfcp_data
.config_lock
);
1175 /* decrease number of adapters in list */
1176 zfcp_data
.adapters
--;
1178 ZFCP_LOG_TRACE("adapter %s (%p) removed from list, "
1179 "%i adapters still in list\n",
1180 zfcp_get_busid_by_adapter(adapter
),
1181 adapter
, zfcp_data
.adapters
);
1183 retval
= qdio_free(adapter
->ccw_device
);
1185 ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n",
1186 zfcp_get_busid_by_adapter(adapter
));
1188 zfcp_free_low_mem_buffers(adapter
);
1189 /* free memory of adapter data structure and queues */
1190 zfcp_qdio_free_queues(adapter
);
1191 zfcp_reqlist_free(adapter
);
1192 kfree(adapter
->fc_stats
);
1193 kfree(adapter
->stats_reset_data
);
1194 ZFCP_LOG_TRACE("freeing adapter structure\n");
1201 * zfcp_port_enqueue - enqueue port to port list of adapter
1202 * @adapter: adapter where remote port is added
1203 * @wwpn: WWPN of the remote port to be enqueued
1204 * @status: initial status for the port
1205 * @d_id: destination id of the remote port to be enqueued
1206 * Return: pointer to enqueued port on success, NULL on error
1207 * Locks: config_sema must be held to serialize changes to the port list
1209 * All port internal structures are set up and the sysfs entry is generated.
1210 * d_id is used to enqueue ports with a well known address like the Directory
1211 * Service for nameserver lookup.
1214 zfcp_port_enqueue(struct zfcp_adapter
*adapter
, wwn_t wwpn
, u32 status
,
1217 struct zfcp_port
*port
;
1220 check_wwpn
= !(status
& ZFCP_STATUS_PORT_NO_WWPN
);
1222 * check that there is no port with this WWPN already in list
1225 read_lock_irq(&zfcp_data
.config_lock
);
1226 port
= zfcp_get_port_by_wwpn(adapter
, wwpn
);
1227 read_unlock_irq(&zfcp_data
.config_lock
);
1232 port
= kzalloc(sizeof (struct zfcp_port
), GFP_KERNEL
);
1236 /* initialise reference count stuff */
1237 atomic_set(&port
->refcount
, 0);
1238 init_waitqueue_head(&port
->remove_wq
);
1240 INIT_LIST_HEAD(&port
->unit_list_head
);
1241 INIT_LIST_HEAD(&port
->unit_remove_lh
);
1243 port
->adapter
= adapter
;
1248 atomic_set_mask(status
, &port
->status
);
1250 /* setup for sysfs registration */
1251 if (status
& ZFCP_STATUS_PORT_WKA
) {
1253 case ZFCP_DID_DIRECTORY_SERVICE
:
1254 snprintf(port
->sysfs_device
.bus_id
, BUS_ID_SIZE
,
1257 case ZFCP_DID_MANAGEMENT_SERVICE
:
1258 snprintf(port
->sysfs_device
.bus_id
, BUS_ID_SIZE
,
1261 case ZFCP_DID_KEY_DISTRIBUTION_SERVICE
:
1262 snprintf(port
->sysfs_device
.bus_id
, BUS_ID_SIZE
,
1263 "key_distribution");
1265 case ZFCP_DID_ALIAS_SERVICE
:
1266 snprintf(port
->sysfs_device
.bus_id
, BUS_ID_SIZE
,
1269 case ZFCP_DID_TIME_SERVICE
:
1270 snprintf(port
->sysfs_device
.bus_id
, BUS_ID_SIZE
,
1278 port
->sysfs_device
.parent
= &adapter
->generic_services
;
1280 snprintf(port
->sysfs_device
.bus_id
,
1281 BUS_ID_SIZE
, "0x%016llx", wwpn
);
1282 port
->sysfs_device
.parent
= &adapter
->ccw_device
->dev
;
1284 port
->sysfs_device
.release
= zfcp_sysfs_port_release
;
1285 dev_set_drvdata(&port
->sysfs_device
, port
);
1287 /* mark port unusable as long as sysfs registration is not complete */
1288 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE
, &port
->status
);
1290 if (device_register(&port
->sysfs_device
)) {
1295 if (zfcp_sysfs_port_create_files(&port
->sysfs_device
, status
)) {
1296 device_unregister(&port
->sysfs_device
);
1300 zfcp_port_get(port
);
1302 write_lock_irq(&zfcp_data
.config_lock
);
1303 list_add_tail(&port
->list
, &adapter
->port_list_head
);
1304 atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE
, &port
->status
);
1305 atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING
, &port
->status
);
1306 if (d_id
== ZFCP_DID_DIRECTORY_SERVICE
)
1307 if (!adapter
->nameserver_port
)
1308 adapter
->nameserver_port
= port
;
1310 write_unlock_irq(&zfcp_data
.config_lock
);
1312 zfcp_adapter_get(adapter
);
1318 zfcp_port_dequeue(struct zfcp_port
*port
)
1320 zfcp_port_wait(port
);
1321 write_lock_irq(&zfcp_data
.config_lock
);
1322 list_del(&port
->list
);
1323 port
->adapter
->ports
--;
1324 write_unlock_irq(&zfcp_data
.config_lock
);
1326 fc_remote_port_delete(port
->rport
);
1328 zfcp_adapter_put(port
->adapter
);
1329 zfcp_sysfs_port_remove_files(&port
->sysfs_device
,
1330 atomic_read(&port
->status
));
1331 device_unregister(&port
->sysfs_device
);
1334 /* Enqueues a nameserver port */
1336 zfcp_nameserver_enqueue(struct zfcp_adapter
*adapter
)
1338 struct zfcp_port
*port
;
1340 port
= zfcp_port_enqueue(adapter
, 0, ZFCP_STATUS_PORT_WKA
,
1341 ZFCP_DID_DIRECTORY_SERVICE
);
1343 ZFCP_LOG_INFO("error: enqueue of nameserver port for "
1344 "adapter %s failed\n",
1345 zfcp_get_busid_by_adapter(adapter
));
1348 zfcp_port_put(port
);
1353 #undef ZFCP_LOG_AREA
1355 /****************************************************************/
1356 /******* Fibre Channel Standard related Functions **************/
1357 /****************************************************************/
1359 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FC
1362 zfcp_fsf_incoming_els_rscn(struct zfcp_adapter
*adapter
,
1363 struct fsf_status_read_buffer
*status_buffer
)
1365 struct fcp_rscn_head
*fcp_rscn_head
;
1366 struct fcp_rscn_element
*fcp_rscn_element
;
1367 struct zfcp_port
*port
;
1371 unsigned long flags
;
1373 fcp_rscn_head
= (struct fcp_rscn_head
*) status_buffer
->payload
;
1374 fcp_rscn_element
= (struct fcp_rscn_element
*) status_buffer
->payload
;
1377 no_entries
= (fcp_rscn_head
->payload_len
/ 4);
1379 for (i
= 1; i
< no_entries
; i
++) {
1380 /* skip head and start with 1st element */
1382 switch (fcp_rscn_element
->addr_format
) {
1383 case ZFCP_PORT_ADDRESS
:
1384 range_mask
= ZFCP_PORTS_RANGE_PORT
;
1386 case ZFCP_AREA_ADDRESS
:
1387 range_mask
= ZFCP_PORTS_RANGE_AREA
;
1389 case ZFCP_DOMAIN_ADDRESS
:
1390 range_mask
= ZFCP_PORTS_RANGE_DOMAIN
;
1392 case ZFCP_FABRIC_ADDRESS
:
1393 range_mask
= ZFCP_PORTS_RANGE_FABRIC
;
1396 ZFCP_LOG_INFO("incoming RSCN with unknown "
1397 "address format\n");
1400 read_lock_irqsave(&zfcp_data
.config_lock
, flags
);
1401 list_for_each_entry(port
, &adapter
->port_list_head
, list
) {
1402 if (atomic_test_mask
1403 (ZFCP_STATUS_PORT_WKA
, &port
->status
))
1405 /* Do we know this port? If not skip it. */
1406 if (!atomic_test_mask
1407 (ZFCP_STATUS_PORT_DID_DID
, &port
->status
)) {
1408 ZFCP_LOG_INFO("incoming RSCN, trying to open "
1409 "port 0x%016Lx\n", port
->wwpn
);
1410 zfcp_erp_port_reopen(port
,
1411 ZFCP_STATUS_COMMON_ERP_FAILED
);
1416 * FIXME: race: d_id might being invalidated
1417 * (...DID_DID reset)
1419 if ((port
->d_id
& range_mask
)
1420 == (fcp_rscn_element
->nport_did
& range_mask
)) {
1421 ZFCP_LOG_TRACE("reopen did 0x%08x\n",
1422 fcp_rscn_element
->nport_did
);
1424 * Unfortunately, an RSCN does not specify the
1425 * type of change a target underwent. We assume
1426 * that it makes sense to reopen the link.
1427 * FIXME: Shall we try to find out more about
1428 * the target and link state before closing it?
1429 * How to accomplish this? (nameserver?)
1430 * Where would such code be put in?
1431 * (inside or outside erp)
1433 ZFCP_LOG_INFO("incoming RSCN, trying to open "
1434 "port 0x%016Lx\n", port
->wwpn
);
1435 zfcp_test_link(port
);
1438 read_unlock_irqrestore(&zfcp_data
.config_lock
, flags
);
1443 zfcp_fsf_incoming_els_plogi(struct zfcp_adapter
*adapter
,
1444 struct fsf_status_read_buffer
*status_buffer
)
1446 struct fsf_plogi
*els_plogi
;
1447 struct zfcp_port
*port
;
1448 unsigned long flags
;
1450 els_plogi
= (struct fsf_plogi
*) status_buffer
->payload
;
1451 read_lock_irqsave(&zfcp_data
.config_lock
, flags
);
1452 list_for_each_entry(port
, &adapter
->port_list_head
, list
) {
1453 if (port
->wwpn
== (*(wwn_t
*) &els_plogi
->serv_param
.wwpn
))
1456 read_unlock_irqrestore(&zfcp_data
.config_lock
, flags
);
1458 if (!port
|| (port
->wwpn
!= (*(wwn_t
*) &els_plogi
->serv_param
.wwpn
))) {
1459 ZFCP_LOG_DEBUG("ignored incoming PLOGI for nonexisting port "
1460 "with d_id 0x%08x on adapter %s\n",
1461 status_buffer
->d_id
,
1462 zfcp_get_busid_by_adapter(adapter
));
1464 zfcp_erp_port_forced_reopen(port
, 0);
1469 zfcp_fsf_incoming_els_logo(struct zfcp_adapter
*adapter
,
1470 struct fsf_status_read_buffer
*status_buffer
)
1472 struct fcp_logo
*els_logo
= (struct fcp_logo
*) status_buffer
->payload
;
1473 struct zfcp_port
*port
;
1474 unsigned long flags
;
1476 read_lock_irqsave(&zfcp_data
.config_lock
, flags
);
1477 list_for_each_entry(port
, &adapter
->port_list_head
, list
) {
1478 if (port
->wwpn
== els_logo
->nport_wwpn
)
1481 read_unlock_irqrestore(&zfcp_data
.config_lock
, flags
);
1483 if (!port
|| (port
->wwpn
!= els_logo
->nport_wwpn
)) {
1484 ZFCP_LOG_DEBUG("ignored incoming LOGO for nonexisting port "
1485 "with d_id 0x%08x on adapter %s\n",
1486 status_buffer
->d_id
,
1487 zfcp_get_busid_by_adapter(adapter
));
1489 zfcp_erp_port_forced_reopen(port
, 0);
1494 zfcp_fsf_incoming_els_unknown(struct zfcp_adapter
*adapter
,
1495 struct fsf_status_read_buffer
*status_buffer
)
1497 ZFCP_LOG_NORMAL("warning: unknown incoming ELS 0x%08x "
1498 "for adapter %s\n", *(u32
*) (status_buffer
->payload
),
1499 zfcp_get_busid_by_adapter(adapter
));
1504 zfcp_fsf_incoming_els(struct zfcp_fsf_req
*fsf_req
)
1506 struct fsf_status_read_buffer
*status_buffer
;
1508 struct zfcp_adapter
*adapter
;
1510 status_buffer
= (struct fsf_status_read_buffer
*) fsf_req
->data
;
1511 els_type
= *(u32
*) (status_buffer
->payload
);
1512 adapter
= fsf_req
->adapter
;
1514 zfcp_san_dbf_event_incoming_els(fsf_req
);
1515 if (els_type
== LS_PLOGI
)
1516 zfcp_fsf_incoming_els_plogi(adapter
, status_buffer
);
1517 else if (els_type
== LS_LOGO
)
1518 zfcp_fsf_incoming_els_logo(adapter
, status_buffer
);
1519 else if ((els_type
& 0xffff0000) == LS_RSCN
)
1520 /* we are only concerned with the command, not the length */
1521 zfcp_fsf_incoming_els_rscn(adapter
, status_buffer
);
1523 zfcp_fsf_incoming_els_unknown(adapter
, status_buffer
);
1528 * zfcp_gid_pn_buffers_alloc - allocate buffers for GID_PN nameserver request
1529 * @gid_pn: pointer to return pointer to struct zfcp_gid_pn_data
1530 * @pool: pointer to mempool_t if non-null memory pool is used for allocation
1533 zfcp_gid_pn_buffers_alloc(struct zfcp_gid_pn_data
**gid_pn
, mempool_t
*pool
)
1535 struct zfcp_gid_pn_data
*data
;
1538 data
= mempool_alloc(pool
, GFP_ATOMIC
);
1539 if (likely(data
!= NULL
)) {
1540 data
->ct
.pool
= pool
;
1543 data
= kmalloc(sizeof(struct zfcp_gid_pn_data
), GFP_ATOMIC
);
1549 memset(data
, 0, sizeof(*data
));
1550 data
->ct
.req
= &data
->req
;
1551 data
->ct
.resp
= &data
->resp
;
1552 data
->ct
.req_count
= data
->ct
.resp_count
= 1;
1553 zfcp_address_to_sg(&data
->ct_iu_req
, &data
->req
);
1554 zfcp_address_to_sg(&data
->ct_iu_resp
, &data
->resp
);
1555 data
->req
.length
= sizeof(struct ct_iu_gid_pn_req
);
1556 data
->resp
.length
= sizeof(struct ct_iu_gid_pn_resp
);
1563 * zfcp_gid_pn_buffers_free - free buffers for GID_PN nameserver request
1564 * @gid_pn: pointer to struct zfcp_gid_pn_data which has to be freed
1567 zfcp_gid_pn_buffers_free(struct zfcp_gid_pn_data
*gid_pn
)
1569 if ((gid_pn
->ct
.pool
!= 0))
1570 mempool_free(gid_pn
, gid_pn
->ct
.pool
);
1578 * zfcp_ns_gid_pn_request - initiate GID_PN nameserver request
1579 * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed
1582 zfcp_ns_gid_pn_request(struct zfcp_erp_action
*erp_action
)
1585 struct ct_iu_gid_pn_req
*ct_iu_req
;
1586 struct zfcp_gid_pn_data
*gid_pn
;
1587 struct zfcp_adapter
*adapter
= erp_action
->adapter
;
1589 ret
= zfcp_gid_pn_buffers_alloc(&gid_pn
, adapter
->pool
.data_gid_pn
);
1591 ZFCP_LOG_INFO("error: buffer allocation for gid_pn nameserver "
1592 "request failed for adapter %s\n",
1593 zfcp_get_busid_by_adapter(adapter
));
1597 /* setup nameserver request */
1598 ct_iu_req
= zfcp_sg_to_address(gid_pn
->ct
.req
);
1599 ct_iu_req
->header
.revision
= ZFCP_CT_REVISION
;
1600 ct_iu_req
->header
.gs_type
= ZFCP_CT_DIRECTORY_SERVICE
;
1601 ct_iu_req
->header
.gs_subtype
= ZFCP_CT_NAME_SERVER
;
1602 ct_iu_req
->header
.options
= ZFCP_CT_SYNCHRONOUS
;
1603 ct_iu_req
->header
.cmd_rsp_code
= ZFCP_CT_GID_PN
;
1604 ct_iu_req
->header
.max_res_size
= ZFCP_CT_MAX_SIZE
;
1605 ct_iu_req
->wwpn
= erp_action
->port
->wwpn
;
1607 /* setup parameters for send generic command */
1608 gid_pn
->ct
.port
= adapter
->nameserver_port
;
1609 gid_pn
->ct
.handler
= zfcp_ns_gid_pn_handler
;
1610 gid_pn
->ct
.handler_data
= (unsigned long) gid_pn
;
1611 gid_pn
->ct
.timeout
= ZFCP_NS_GID_PN_TIMEOUT
;
1612 gid_pn
->ct
.timer
= &erp_action
->timer
;
1613 gid_pn
->port
= erp_action
->port
;
1615 ret
= zfcp_fsf_send_ct(&gid_pn
->ct
, adapter
->pool
.fsf_req_erp
,
1618 ZFCP_LOG_INFO("error: initiation of gid_pn nameserver request "
1619 "failed for adapter %s\n",
1620 zfcp_get_busid_by_adapter(adapter
));
1622 zfcp_gid_pn_buffers_free(gid_pn
);
1630 * zfcp_ns_gid_pn_handler - handler for GID_PN nameserver request
1631 * @data: unsigned long, contains pointer to struct zfcp_gid_pn_data
1633 static void zfcp_ns_gid_pn_handler(unsigned long data
)
1635 struct zfcp_port
*port
;
1636 struct zfcp_send_ct
*ct
;
1637 struct ct_iu_gid_pn_req
*ct_iu_req
;
1638 struct ct_iu_gid_pn_resp
*ct_iu_resp
;
1639 struct zfcp_gid_pn_data
*gid_pn
;
1642 gid_pn
= (struct zfcp_gid_pn_data
*) data
;
1643 port
= gid_pn
->port
;
1645 ct_iu_req
= zfcp_sg_to_address(ct
->req
);
1646 ct_iu_resp
= zfcp_sg_to_address(ct
->resp
);
1648 if (ct
->status
!= 0)
1651 if (zfcp_check_ct_response(&ct_iu_resp
->header
)) {
1652 /* FIXME: do we need some specific erp entry points */
1653 atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN
, &port
->status
);
1657 if (ct_iu_req
->wwpn
!= port
->wwpn
) {
1658 ZFCP_LOG_NORMAL("bug: wwpn 0x%016Lx returned by nameserver "
1659 "lookup does not match expected wwpn 0x%016Lx "
1660 "for adapter %s\n", ct_iu_req
->wwpn
, port
->wwpn
,
1661 zfcp_get_busid_by_port(port
));
1665 /* looks like a valid d_id */
1666 port
->d_id
= ct_iu_resp
->d_id
& ZFCP_DID_MASK
;
1667 atomic_set_mask(ZFCP_STATUS_PORT_DID_DID
, &port
->status
);
1668 ZFCP_LOG_DEBUG("adapter %s: wwpn=0x%016Lx ---> d_id=0x%08x\n",
1669 zfcp_get_busid_by_port(port
), port
->wwpn
, port
->d_id
);
1673 ZFCP_LOG_DEBUG("CT IUs do not match:\n");
1674 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG
, (char *) ct_iu_req
,
1675 sizeof(struct ct_iu_gid_pn_req
));
1676 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG
, (char *) ct_iu_resp
,
1677 sizeof(struct ct_iu_gid_pn_resp
));
1680 ZFCP_LOG_NORMAL("warning: failed gid_pn nameserver request for wwpn "
1681 "0x%016Lx for adapter %s\n",
1682 port
->wwpn
, zfcp_get_busid_by_port(port
));
1684 zfcp_gid_pn_buffers_free(gid_pn
);
1688 /* reject CT_IU reason codes acc. to FC-GS-4 */
1689 static const struct zfcp_rc_entry zfcp_ct_rc
[] = {
1690 {0x01, "invalid command code"},
1691 {0x02, "invalid version level"},
1692 {0x03, "logical error"},
1693 {0x04, "invalid CT_IU size"},
1694 {0x05, "logical busy"},
1695 {0x07, "protocol error"},
1696 {0x09, "unable to perform command request"},
1697 {0x0b, "command not supported"},
1698 {0x0d, "server not available"},
1699 {0x0e, "session could not be established"},
1700 {0xff, "vendor specific error"},
1704 /* LS_RJT reason codes acc. to FC-FS */
1705 static const struct zfcp_rc_entry zfcp_ls_rjt_rc
[] = {
1706 {0x01, "invalid LS_Command code"},
1707 {0x03, "logical error"},
1708 {0x05, "logical busy"},
1709 {0x07, "protocol error"},
1710 {0x09, "unable to perform command request"},
1711 {0x0b, "command not supported"},
1712 {0x0e, "command already in progress"},
1713 {0xff, "vendor specific error"},
1717 /* reject reason codes according to FC-PH/FC-FS */
1718 static const struct zfcp_rc_entry zfcp_p_rjt_rc
[] = {
1719 {0x01, "invalid D_ID"},
1720 {0x02, "invalid S_ID"},
1721 {0x03, "Nx_Port not available, temporary"},
1722 {0x04, "Nx_Port not available, permament"},
1723 {0x05, "class not supported"},
1724 {0x06, "delimiter usage error"},
1725 {0x07, "TYPE not supported"},
1726 {0x08, "invalid Link_Control"},
1727 {0x09, "invalid R_CTL field"},
1728 {0x0a, "invalid F_CTL field"},
1729 {0x0b, "invalid OX_ID"},
1730 {0x0c, "invalid RX_ID"},
1731 {0x0d, "invalid SEQ_ID"},
1732 {0x0e, "invalid DF_CTL"},
1733 {0x0f, "invalid SEQ_CNT"},
1734 {0x10, "invalid parameter field"},
1735 {0x11, "exchange error"},
1736 {0x12, "protocol error"},
1737 {0x13, "incorrect length"},
1738 {0x14, "unsupported ACK"},
1739 {0x15, "class of service not supported by entity at FFFFFE"},
1740 {0x16, "login required"},
1741 {0x17, "excessive sequences attempted"},
1742 {0x18, "unable to establish exchange"},
1743 {0x1a, "fabric path not available"},
1744 {0x1b, "invalid VC_ID (class 4)"},
1745 {0x1c, "invalid CS_CTL field"},
1746 {0x1d, "insufficient resources for VC (class 4)"},
1747 {0x1f, "invalid class of service"},
1748 {0x20, "preemption request rejected"},
1749 {0x21, "preemption not enabled"},
1750 {0x22, "multicast error"},
1751 {0x23, "multicast error terminate"},
1752 {0x24, "process login required"},
1753 {0xff, "vendor specific reject"},
1758 * zfcp_rc_description - return description for given reaon code
1759 * @code: reason code
1760 * @rc_table: table of reason codes and descriptions
1762 static inline const char *
1763 zfcp_rc_description(u8 code
, const struct zfcp_rc_entry
*rc_table
)
1765 const char *descr
= "unknown reason code";
1768 if (code
== rc_table
->code
) {
1769 descr
= rc_table
->description
;
1773 } while (rc_table
->code
&& rc_table
->description
);
1779 * zfcp_check_ct_response - evaluate reason code for CT_IU
1780 * @rjt: response payload to an CT_IU request
1781 * Return: 0 for accept CT_IU, 1 for reject CT_IU or invlid response code
1784 zfcp_check_ct_response(struct ct_hdr
*rjt
)
1786 if (rjt
->cmd_rsp_code
== ZFCP_CT_ACCEPT
)
1789 if (rjt
->cmd_rsp_code
!= ZFCP_CT_REJECT
) {
1790 ZFCP_LOG_NORMAL("error: invalid Generic Service command/"
1791 "response code (0x%04hx)\n",
1796 ZFCP_LOG_INFO("Generic Service command rejected\n");
1797 ZFCP_LOG_INFO("%s (0x%02x, 0x%02x, 0x%02x)\n",
1798 zfcp_rc_description(rjt
->reason_code
, zfcp_ct_rc
),
1799 (u32
) rjt
->reason_code
, (u32
) rjt
->reason_code_expl
,
1800 (u32
) rjt
->vendor_unique
);
1806 * zfcp_print_els_rjt - print reject parameter and description for ELS reject
1807 * @rjt_par: reject parameter acc. to FC-PH/FC-FS
1808 * @rc_table: table of reason codes and descriptions
1811 zfcp_print_els_rjt(struct zfcp_ls_rjt_par
*rjt_par
,
1812 const struct zfcp_rc_entry
*rc_table
)
1814 ZFCP_LOG_INFO("%s (%02x %02x %02x %02x)\n",
1815 zfcp_rc_description(rjt_par
->reason_code
, rc_table
),
1816 (u32
) rjt_par
->action
, (u32
) rjt_par
->reason_code
,
1817 (u32
) rjt_par
->reason_expl
, (u32
) rjt_par
->vendor_unique
);
1821 * zfcp_fsf_handle_els_rjt - evaluate status qualifier/reason code on ELS reject
1822 * @sq: status qualifier word
1823 * @rjt_par: reject parameter as described in FC-PH and FC-FS
1824 * Return: -EROMTEIO for LS_RJT, -EREMCHG for invalid D_ID, -EIO else
1827 zfcp_handle_els_rjt(u32 sq
, struct zfcp_ls_rjt_par
*rjt_par
)
1831 if (sq
== FSF_IOSTAT_NPORT_RJT
) {
1832 ZFCP_LOG_INFO("ELS rejected (P_RJT)\n");
1833 zfcp_print_els_rjt(rjt_par
, zfcp_p_rjt_rc
);
1835 if (rjt_par
->reason_code
== 0x01)
1837 } else if (sq
== FSF_IOSTAT_FABRIC_RJT
) {
1838 ZFCP_LOG_INFO("ELS rejected (F_RJT)\n");
1839 zfcp_print_els_rjt(rjt_par
, zfcp_p_rjt_rc
);
1841 if (rjt_par
->reason_code
== 0x01)
1843 } else if (sq
== FSF_IOSTAT_LS_RJT
) {
1844 ZFCP_LOG_INFO("ELS rejected (LS_RJT)\n");
1845 zfcp_print_els_rjt(rjt_par
, zfcp_ls_rjt_rc
);
1848 ZFCP_LOG_INFO("unexpected SQ: 0x%02x\n", sq
);
1854 * zfcp_plogi_evaluate - evaluate PLOGI playload and copy important fields
1855 * into zfcp_port structure
1856 * @port: zfcp_port structure
1857 * @plogi: plogi payload
1860 zfcp_plogi_evaluate(struct zfcp_port
*port
, struct fsf_plogi
*plogi
)
1862 port
->maxframe_size
= plogi
->serv_param
.common_serv_param
[7] |
1863 ((plogi
->serv_param
.common_serv_param
[6] & 0x0F) << 8);
1864 if (plogi
->serv_param
.class1_serv_param
[0] & 0x80)
1865 port
->supported_classes
|= FC_COS_CLASS1
;
1866 if (plogi
->serv_param
.class2_serv_param
[0] & 0x80)
1867 port
->supported_classes
|= FC_COS_CLASS2
;
1868 if (plogi
->serv_param
.class3_serv_param
[0] & 0x80)
1869 port
->supported_classes
|= FC_COS_CLASS3
;
1870 if (plogi
->serv_param
.class4_serv_param
[0] & 0x80)
1871 port
->supported_classes
|= FC_COS_CLASS4
;
1874 #undef ZFCP_LOG_AREA