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 int zfcp_sg_list_alloc(struct zfcp_sg_list *, size_t);
51 static void zfcp_sg_list_free(struct zfcp_sg_list *);
52 static int zfcp_sg_list_copy_from_user(struct zfcp_sg_list *,
53 void __user *, size_t);
54 static int zfcp_sg_list_copy_to_user(void __user *,
55 struct zfcp_sg_list *, size_t);
56 static long zfcp_cfdc_dev_ioctl(struct file *, unsigned int, unsigned long);
58 #define ZFCP_CFDC_IOC_MAGIC 0xDD
59 #define ZFCP_CFDC_IOC \
60 _IOWR(ZFCP_CFDC_IOC_MAGIC, 0, struct zfcp_cfdc_sense_data)
63 static const struct file_operations zfcp_cfdc_fops = {
64 .unlocked_ioctl = zfcp_cfdc_dev_ioctl,
66 .compat_ioctl = zfcp_cfdc_dev_ioctl
70 static struct miscdevice zfcp_cfdc_misc = {
71 .minor = ZFCP_CFDC_DEV_MINOR,
72 .name = ZFCP_CFDC_DEV_NAME,
73 .fops = &zfcp_cfdc_fops
76 /*********************** KERNEL/MODULE PARAMETERS ***************************/
78 /* declare driver module init/cleanup functions */
79 module_init(zfcp_module_init);
81 MODULE_AUTHOR("IBM Deutschland Entwicklung GmbH - linux390@de.ibm.com");
83 ("FCP (SCSI over Fibre Channel) HBA driver for IBM System z9 and zSeries");
84 MODULE_LICENSE("GPL");
86 module_param(device, charp, 0400);
87 MODULE_PARM_DESC(device, "specify initial device");
89 module_param(loglevel, uint, 0400);
90 MODULE_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");
95 /****************************************************************/
96 /************** Functions without logging ***********************/
97 /****************************************************************/
100 _zfcp_hex_dump(char *addr, int count)
103 for (i = 0; i < count; i++) {
104 printk("%02x", addr[i]);
110 if (((i-1) % 32) != 31)
115 /****************************************************************/
116 /****** Functions to handle the request ID hash table ********/
117 /****************************************************************/
119 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FSF
121 static int zfcp_reqlist_alloc(struct zfcp_adapter *adapter)
125 adapter->req_list = kcalloc(REQUEST_LIST_SIZE, sizeof(struct list_head),
127 if (!adapter->req_list)
130 for (idx = 0; idx < REQUEST_LIST_SIZE; idx++)
131 INIT_LIST_HEAD(&adapter->req_list[idx]);
135 static void zfcp_reqlist_free(struct zfcp_adapter *adapter)
137 kfree(adapter->req_list);
140 int zfcp_reqlist_isempty(struct zfcp_adapter *adapter)
144 for (idx = 0; idx < REQUEST_LIST_SIZE; idx++)
145 if (!list_empty(&adapter->req_list[idx]))
152 /****************************************************************/
153 /************** Uncategorised Functions *************************/
154 /****************************************************************/
156 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_OTHER
159 * zfcp_device_setup - setup function
160 * @str: pointer to parameter string
162 * Parse "device=..." parameter string.
165 zfcp_device_setup(char *devstr)
173 len = strlen(devstr) + 1;
174 str = kmalloc(len, GFP_KERNEL);
177 memcpy(str, devstr, len);
179 tmp = strchr(str, ',');
183 strncpy(zfcp_data.init_busid, str, BUS_ID_SIZE);
184 zfcp_data.init_busid[BUS_ID_SIZE-1] = '\0';
186 zfcp_data.init_wwpn = simple_strtoull(tmp, &tmp, 0);
192 zfcp_data.init_fcp_lun = simple_strtoull(tmp, &tmp, 0);
199 ZFCP_LOG_NORMAL("Parse error for device parameter string %s\n", str);
205 zfcp_init_device_configure(void)
207 struct zfcp_adapter *adapter;
208 struct zfcp_port *port;
209 struct zfcp_unit *unit;
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);
215 zfcp_adapter_get(adapter);
216 read_unlock_irq(&zfcp_data.config_lock);
220 port = zfcp_port_enqueue(adapter, zfcp_data.init_wwpn, 0, 0);
223 unit = zfcp_unit_enqueue(port, zfcp_data.init_fcp_lun);
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);
234 zfcp_adapter_put(adapter);
236 up(&zfcp_data.config_sema);
240 static int calc_alignment(int size)
247 while ((size - align) > 0)
254 zfcp_module_init(void)
256 int retval = -ENOMEM;
259 size = sizeof(struct zfcp_fsf_req_qtcb);
260 align = calc_alignment(size);
261 zfcp_data.fsf_req_qtcb_cache =
262 kmem_cache_create("zfcp_fsf", size, align, 0, NULL);
263 if (!zfcp_data.fsf_req_qtcb_cache)
266 size = sizeof(struct fsf_status_read_buffer);
267 align = calc_alignment(size);
268 zfcp_data.sr_buffer_cache =
269 kmem_cache_create("zfcp_sr", size, align, 0, NULL);
270 if (!zfcp_data.sr_buffer_cache)
273 size = sizeof(struct zfcp_gid_pn_data);
274 align = calc_alignment(size);
275 zfcp_data.gid_pn_cache =
276 kmem_cache_create("zfcp_gid", size, align, 0, NULL);
277 if (!zfcp_data.gid_pn_cache)
280 atomic_set(&zfcp_data.loglevel, loglevel);
282 /* initialize adapter list */
283 INIT_LIST_HEAD(&zfcp_data.adapter_list_head);
285 /* initialize adapters to be removed list head */
286 INIT_LIST_HEAD(&zfcp_data.adapter_remove_lh);
288 zfcp_data.scsi_transport_template =
289 fc_attach_transport(&zfcp_transport_functions);
290 if (!zfcp_data.scsi_transport_template)
293 retval = misc_register(&zfcp_cfdc_misc);
295 ZFCP_LOG_INFO("registration of misc device "
296 "zfcp_cfdc failed\n");
300 ZFCP_LOG_TRACE("major/minor for zfcp_cfdc: %d/%d\n",
301 ZFCP_CFDC_DEV_MAJOR, zfcp_cfdc_misc.minor);
303 /* Initialise proc semaphores */
304 sema_init(&zfcp_data.config_sema, 1);
306 /* initialise configuration rw lock */
307 rwlock_init(&zfcp_data.config_lock);
309 /* setup dynamic I/O */
310 retval = zfcp_ccw_register();
312 ZFCP_LOG_NORMAL("registration with common I/O layer failed\n");
313 goto out_ccw_register;
316 if (zfcp_device_setup(device))
317 zfcp_init_device_configure();
322 misc_deregister(&zfcp_cfdc_misc);
324 fc_release_transport(zfcp_data.scsi_transport_template);
326 kmem_cache_destroy(zfcp_data.gid_pn_cache);
328 kmem_cache_destroy(zfcp_data.sr_buffer_cache);
330 kmem_cache_destroy(zfcp_data.fsf_req_qtcb_cache);
336 * function: zfcp_cfdc_dev_ioctl
338 * purpose: Handle control file upload/download transaction via IOCTL
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)
352 zfcp_cfdc_dev_ioctl(struct file *file, unsigned int command,
353 unsigned long buffer)
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;
363 sense_data = kmalloc(sizeof(struct zfcp_cfdc_sense_data), GFP_KERNEL);
364 if (sense_data == NULL) {
369 sg_list = kzalloc(sizeof(struct zfcp_sg_list), GFP_KERNEL);
370 if (sg_list == NULL) {
375 if (command != ZFCP_CFDC_IOC) {
376 ZFCP_LOG_INFO("IOC request code 0x%x invalid\n", command);
381 if ((sense_data_user = (void __user *) buffer) == NULL) {
382 ZFCP_LOG_INFO("sense data record is required\n");
387 retval = copy_from_user(sense_data, sense_data_user,
388 sizeof(struct zfcp_cfdc_sense_data));
394 if (sense_data->signature != ZFCP_CFDC_SIGNATURE) {
395 ZFCP_LOG_INFO("invalid sense data request signature 0x%08x\n",
396 ZFCP_CFDC_SIGNATURE);
401 switch (sense_data->command) {
403 case ZFCP_CFDC_CMND_DOWNLOAD_NORMAL:
404 fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
405 option = FSF_CFDC_OPTION_NORMAL_MODE;
408 case ZFCP_CFDC_CMND_DOWNLOAD_FORCE:
409 fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
410 option = FSF_CFDC_OPTION_FORCE;
413 case ZFCP_CFDC_CMND_FULL_ACCESS:
414 fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
415 option = FSF_CFDC_OPTION_FULL_ACCESS;
418 case ZFCP_CFDC_CMND_RESTRICTED_ACCESS:
419 fsf_command = FSF_QTCB_DOWNLOAD_CONTROL_FILE;
420 option = FSF_CFDC_OPTION_RESTRICTED_ACCESS;
423 case ZFCP_CFDC_CMND_UPLOAD:
424 fsf_command = FSF_QTCB_UPLOAD_CONTROL_FILE;
429 ZFCP_LOG_INFO("invalid command code 0x%08x\n",
430 sense_data->command);
435 bus_id = kmalloc(BUS_ID_SIZE, GFP_KERNEL);
436 if (bus_id == NULL) {
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));
445 read_lock_irq(&zfcp_data.config_lock);
446 adapter = zfcp_get_adapter_by_busid(bus_id);
448 zfcp_adapter_get(adapter);
449 read_unlock_irq(&zfcp_data.config_lock);
453 if (adapter == NULL) {
454 ZFCP_LOG_INFO("invalid adapter\n");
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);
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);
479 retval = zfcp_fsf_control_file(adapter, &fsf_req, fsf_command,
484 if ((fsf_req->qtcb->prefix.prot_status != FSF_PROT_GOOD) &&
485 (fsf_req->qtcb->prefix.prot_status != FSF_PROT_FSF_STATUS_PRESENTED)) {
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);
496 retval = copy_to_user(sense_data_user, sense_data,
497 sizeof(struct zfcp_cfdc_sense_data));
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);
515 zfcp_fsf_req_free(fsf_req);
517 if ((adapter != NULL) && (retval != -ENXIO))
518 zfcp_adapter_put(adapter);
520 if (sg_list != NULL) {
521 zfcp_sg_list_free(sg_list);
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
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.
543 zfcp_sg_list_alloc(struct zfcp_sg_list *sg_list, size_t size)
545 struct scatterlist *sg;
550 BUG_ON(sg_list == NULL);
552 sg_list->count = size >> PAGE_SHIFT;
553 if (size & ~PAGE_MASK)
555 sg_list->sg = kcalloc(sg_list->count, sizeof(struct scatterlist),
557 if (sg_list->sg == NULL) {
562 sg_init_table(sg_list->sg, sg_list->count);
564 for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++) {
565 sg->length = min(size, PAGE_SIZE);
567 address = (void *) get_zeroed_page(GFP_KERNEL);
568 if (address == NULL) {
570 zfcp_sg_list_free(sg_list);
574 zfcp_address_to_sg(address, sg);
584 * zfcp_sg_list_free - free memory of a scatter-gather list
585 * @sg_list: structure describing a scatter-gather list
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.
591 zfcp_sg_list_free(struct zfcp_sg_list *sg_list)
593 struct scatterlist *sg;
596 BUG_ON(sg_list == NULL);
598 for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++)
599 free_page((unsigned long) zfcp_sg_to_address(sg));
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
611 static size_t zfcp_sg_size(struct scatterlist *sg, unsigned int sg_count)
614 struct scatterlist *p;
618 for (i = 0, p = sg; i < sg_count; i++, p++) {
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.
635 zfcp_sg_list_copy_from_user(struct zfcp_sg_list *sg_list,
636 void __user *user_buffer,
639 struct scatterlist *sg;
644 BUG_ON(sg_list == NULL);
646 if (zfcp_sg_size(sg_list->sg, sg_list->count) < size)
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)) {
656 user_buffer += length;
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
673 zfcp_sg_list_copy_to_user(void __user *user_buffer,
674 struct zfcp_sg_list *sg_list,
677 struct scatterlist *sg;
682 BUG_ON(sg_list == NULL);
684 if (zfcp_sg_size(sg_list->sg, sg_list->count) < size)
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)) {
694 user_buffer += length;
705 /****************************************************************/
706 /****** Functions for configuration/set-up of structures ********/
707 /****************************************************************/
709 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG
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.
719 zfcp_get_unit_by_lun(struct zfcp_port *port, fcp_lun_t fcp_lun)
721 struct zfcp_unit *unit;
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))
732 return found ? unit : NULL;
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.
743 zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, wwn_t wwpn)
745 struct zfcp_port *port;
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))) {
756 return found ? port : NULL;
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.
767 zfcp_get_port_by_did(struct zfcp_adapter *adapter, u32 d_id)
769 struct zfcp_port *port;
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))
780 return found ? port : NULL;
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.
789 struct zfcp_adapter *
790 zfcp_get_adapter_by_busid(char *bus_id)
792 struct zfcp_adapter *adapter;
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,
804 return found ? adapter : NULL;
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
814 * Sets up some unit internal structures and creates sysfs entry.
817 zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun)
819 struct zfcp_unit *unit;
822 * check that there is no unit with this FCP_LUN already in list
824 * Note: Unlike for the adapter and the port, this is an error
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);
832 unit = kzalloc(sizeof (struct zfcp_unit), GFP_KERNEL);
836 /* initialise reference count stuff */
837 atomic_set(&unit->refcount, 0);
838 init_waitqueue_head(&unit->remove_wq);
841 unit->fcp_lun = fcp_lun;
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);
849 init_waitqueue_head(&unit->scsi_scan_wq);
851 /* mark unit unusable as long as sysfs registration is not complete */
852 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
854 if (device_register(&unit->sysfs_device)) {
859 if (zfcp_sysfs_unit_create_files(&unit->sysfs_device)) {
860 device_unregister(&unit->sysfs_device);
865 unit->scsi_lun = scsilun_to_int((struct scsi_lun *)&unit->fcp_lun);
867 write_lock_irq(&zfcp_data.config_lock);
868 list_add_tail(&unit->list, &port->unit_list_head);
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);
880 zfcp_unit_dequeue(struct zfcp_unit *unit)
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);
887 zfcp_port_put(unit->port);
888 zfcp_sysfs_unit_remove_files(&unit->sysfs_device);
889 device_unregister(&unit->sysfs_device);
893 * Allocates a combined QTCB/fsf_req buffer for erp actions and fcp/SCSI
895 * It also genrates fcp-nameserver request/response buffer and unsolicited
896 * status read fsf_req buffers.
898 * locks: must only be called with zfcp_data.config_sema taken
901 zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter)
903 adapter->pool.fsf_req_erp =
904 mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ERP_NR,
905 zfcp_data.fsf_req_qtcb_cache);
906 if (!adapter->pool.fsf_req_erp)
909 adapter->pool.fsf_req_scsi =
910 mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_SCSI_NR,
911 zfcp_data.fsf_req_qtcb_cache);
912 if (!adapter->pool.fsf_req_scsi)
915 adapter->pool.fsf_req_abort =
916 mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ABORT_NR,
917 zfcp_data.fsf_req_qtcb_cache);
918 if (!adapter->pool.fsf_req_abort)
921 adapter->pool.fsf_req_status_read =
922 mempool_create_kmalloc_pool(ZFCP_POOL_STATUS_READ_NR,
923 sizeof(struct zfcp_fsf_req));
924 if (!adapter->pool.fsf_req_status_read)
927 adapter->pool.data_status_read =
928 mempool_create_slab_pool(ZFCP_POOL_STATUS_READ_NR,
929 zfcp_data.sr_buffer_cache);
930 if (!adapter->pool.data_status_read)
933 adapter->pool.data_gid_pn =
934 mempool_create_slab_pool(ZFCP_POOL_DATA_GID_PN_NR,
935 zfcp_data.gid_pn_cache);
936 if (!adapter->pool.data_gid_pn)
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
948 zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter)
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);
964 static void zfcp_dummy_release(struct device *dev)
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.
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
979 struct zfcp_adapter *
980 zfcp_adapter_enqueue(struct ccw_device *ccw_device)
983 struct zfcp_adapter *adapter;
986 * Note: It is safe to release the list_lock, as any list changes
987 * are protected by the config_sema, which must be held to get here
990 /* try to allocate new adapter data structure (zeroed) */
991 adapter = kzalloc(sizeof (struct zfcp_adapter), GFP_KERNEL);
993 ZFCP_LOG_INFO("error: allocation of base adapter "
994 "structure failed\n");
998 ccw_device->handler = NULL;
1000 /* save ccw_device pointer */
1001 adapter->ccw_device = ccw_device;
1003 retval = zfcp_qdio_allocate_queues(adapter);
1005 goto queues_alloc_failed;
1007 retval = zfcp_qdio_allocate(adapter);
1009 goto qdio_allocate_failed;
1011 retval = zfcp_allocate_low_mem_buffers(adapter);
1013 ZFCP_LOG_INFO("error: pool allocation failed\n");
1014 goto failed_low_mem_buffers;
1017 /* initialise reference count stuff */
1018 atomic_set(&adapter->refcount, 0);
1019 init_waitqueue_head(&adapter->remove_wq);
1021 /* initialise list of ports */
1022 INIT_LIST_HEAD(&adapter->port_list_head);
1024 /* initialise list of ports to be removed */
1025 INIT_LIST_HEAD(&adapter->port_remove_lh);
1027 /* initialize list of fsf requests */
1028 spin_lock_init(&adapter->req_list_lock);
1029 retval = zfcp_reqlist_alloc(adapter);
1031 ZFCP_LOG_INFO("request list initialization failed\n");
1032 goto failed_low_mem_buffers;
1035 /* initialize debug locks */
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);
1042 retval = zfcp_adapter_debug_register(adapter);
1044 goto debug_register_failed;
1046 /* initialize error recovery stuff */
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);
1053 /* initialize abort lock */
1054 rwlock_init(&adapter->abort_lock);
1056 /* initialise some erp stuff */
1057 init_waitqueue_head(&adapter->erp_thread_wqh);
1058 init_waitqueue_head(&adapter->erp_done_wqh);
1060 /* initialize lock of associated request queue */
1061 rwlock_init(&adapter->request_queue.queue_lock);
1063 /* mark adapter unusable as long as sysfs registration is not complete */
1064 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
1066 dev_set_drvdata(&ccw_device->dev, adapter);
1068 if (zfcp_sysfs_adapter_create_files(&ccw_device->dev))
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");
1076 if (device_register(&adapter->generic_services))
1077 goto generic_services_failed;
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);
1085 zfcp_data.adapters++;
1089 generic_services_failed:
1090 zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev);
1092 zfcp_adapter_debug_unregister(adapter);
1093 debug_register_failed:
1094 dev_set_drvdata(&ccw_device->dev, NULL);
1095 zfcp_reqlist_free(adapter);
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:
1111 * returns: 0 - struct zfcp_adapter data structure successfully removed
1112 * !0 - struct zfcp_adapter data structure could not be removed
1114 * locks: adapter list write lock is assumed to be held by caller
1117 zfcp_adapter_dequeue(struct zfcp_adapter *adapter)
1120 unsigned long flags;
1122 zfcp_adapter_scsi_unregister(adapter);
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 */
1127 spin_lock_irqsave(&adapter->req_list_lock, flags);
1128 retval = zfcp_reqlist_isempty(adapter);
1129 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
1131 ZFCP_LOG_NORMAL("bug: adapter %s (%p) still in use, "
1132 "%i requests outstanding\n",
1133 zfcp_get_busid_by_adapter(adapter), adapter,
1134 atomic_read(&adapter->reqs_active));
1139 zfcp_adapter_debug_unregister(adapter);
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);
1146 /* decrease number of adapters in list */
1147 zfcp_data.adapters--;
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);
1154 retval = qdio_free(adapter->ccw_device);
1156 ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n",
1157 zfcp_get_busid_by_adapter(adapter));
1159 zfcp_free_low_mem_buffers(adapter);
1160 /* free memory of adapter data structure and queues */
1161 zfcp_qdio_free_queues(adapter);
1162 zfcp_reqlist_free(adapter);
1163 kfree(adapter->fc_stats);
1164 kfree(adapter->stats_reset_data);
1165 ZFCP_LOG_TRACE("freeing adapter structure\n");
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
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.
1185 zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, u32 status,
1188 struct zfcp_port *port;
1191 check_wwpn = !(status & ZFCP_STATUS_PORT_NO_WWPN);
1193 * check that there is no port with this WWPN already in list
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);
1203 port = kzalloc(sizeof (struct zfcp_port), GFP_KERNEL);
1207 /* initialise reference count stuff */
1208 atomic_set(&port->refcount, 0);
1209 init_waitqueue_head(&port->remove_wq);
1211 INIT_LIST_HEAD(&port->unit_list_head);
1212 INIT_LIST_HEAD(&port->unit_remove_lh);
1214 port->adapter = adapter;
1219 atomic_set_mask(status, &port->status);
1221 /* setup for sysfs registration */
1222 if (status & ZFCP_STATUS_PORT_WKA) {
1224 case ZFCP_DID_DIRECTORY_SERVICE:
1225 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1228 case ZFCP_DID_MANAGEMENT_SERVICE:
1229 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1232 case ZFCP_DID_KEY_DISTRIBUTION_SERVICE:
1233 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1234 "key_distribution");
1236 case ZFCP_DID_ALIAS_SERVICE:
1237 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1240 case ZFCP_DID_TIME_SERVICE:
1241 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1249 port->sysfs_device.parent = &adapter->generic_services;
1251 snprintf(port->sysfs_device.bus_id,
1252 BUS_ID_SIZE, "0x%016llx", wwpn);
1253 port->sysfs_device.parent = &adapter->ccw_device->dev;
1255 port->sysfs_device.release = zfcp_sysfs_port_release;
1256 dev_set_drvdata(&port->sysfs_device, port);
1258 /* mark port unusable as long as sysfs registration is not complete */
1259 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
1261 if (device_register(&port->sysfs_device)) {
1266 if (zfcp_sysfs_port_create_files(&port->sysfs_device, status)) {
1267 device_unregister(&port->sysfs_device);
1271 zfcp_port_get(port);
1273 write_lock_irq(&zfcp_data.config_lock);
1274 list_add_tail(&port->list, &adapter->port_list_head);
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;
1281 write_unlock_irq(&zfcp_data.config_lock);
1283 zfcp_adapter_get(adapter);
1289 zfcp_port_dequeue(struct zfcp_port *port)
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);
1297 fc_remote_port_delete(port->rport);
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);
1305 /* Enqueues a nameserver port */
1307 zfcp_nameserver_enqueue(struct zfcp_adapter *adapter)
1309 struct zfcp_port *port;
1311 port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA,
1312 ZFCP_DID_DIRECTORY_SERVICE);
1314 ZFCP_LOG_INFO("error: enqueue of nameserver port for "
1315 "adapter %s failed\n",
1316 zfcp_get_busid_by_adapter(adapter));
1319 zfcp_port_put(port);
1324 #undef ZFCP_LOG_AREA
1326 /****************************************************************/
1327 /******* Fibre Channel Standard related Functions **************/
1328 /****************************************************************/
1330 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FC
1333 zfcp_fsf_incoming_els_rscn(struct zfcp_adapter *adapter,
1334 struct fsf_status_read_buffer *status_buffer)
1336 struct fcp_rscn_head *fcp_rscn_head;
1337 struct fcp_rscn_element *fcp_rscn_element;
1338 struct zfcp_port *port;
1342 unsigned long flags;
1344 fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload;
1345 fcp_rscn_element = (struct fcp_rscn_element *) status_buffer->payload;
1348 no_entries = (fcp_rscn_head->payload_len / 4);
1350 for (i = 1; i < no_entries; i++) {
1351 /* skip head and start with 1st element */
1353 switch (fcp_rscn_element->addr_format) {
1354 case ZFCP_PORT_ADDRESS:
1355 range_mask = ZFCP_PORTS_RANGE_PORT;
1357 case ZFCP_AREA_ADDRESS:
1358 range_mask = ZFCP_PORTS_RANGE_AREA;
1360 case ZFCP_DOMAIN_ADDRESS:
1361 range_mask = ZFCP_PORTS_RANGE_DOMAIN;
1363 case ZFCP_FABRIC_ADDRESS:
1364 range_mask = ZFCP_PORTS_RANGE_FABRIC;
1367 ZFCP_LOG_INFO("incoming RSCN with unknown "
1368 "address format\n");
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))
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);
1381 zfcp_erp_port_reopen(port,
1382 ZFCP_STATUS_COMMON_ERP_FAILED);
1387 * FIXME: race: d_id might being invalidated
1388 * (...DID_DID reset)
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);
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)
1404 ZFCP_LOG_INFO("incoming RSCN, trying to open "
1405 "port 0x%016Lx\n", port->wwpn);
1406 zfcp_test_link(port);
1409 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1414 zfcp_fsf_incoming_els_plogi(struct zfcp_adapter *adapter,
1415 struct fsf_status_read_buffer *status_buffer)
1417 struct fsf_plogi *els_plogi;
1418 struct zfcp_port *port;
1419 unsigned long flags;
1421 els_plogi = (struct fsf_plogi *) status_buffer->payload;
1422 read_lock_irqsave(&zfcp_data.config_lock, flags);
1423 list_for_each_entry(port, &adapter->port_list_head, list) {
1424 if (port->wwpn == (*(wwn_t *) &els_plogi->serv_param.wwpn))
1427 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1429 if (!port || (port->wwpn != (*(wwn_t *) &els_plogi->serv_param.wwpn))) {
1430 ZFCP_LOG_DEBUG("ignored incoming PLOGI for nonexisting port "
1431 "with d_id 0x%06x on adapter %s\n",
1432 status_buffer->d_id,
1433 zfcp_get_busid_by_adapter(adapter));
1435 zfcp_erp_port_forced_reopen(port, 0);
1440 zfcp_fsf_incoming_els_logo(struct zfcp_adapter *adapter,
1441 struct fsf_status_read_buffer *status_buffer)
1443 struct fcp_logo *els_logo = (struct fcp_logo *) status_buffer->payload;
1444 struct zfcp_port *port;
1445 unsigned long flags;
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)
1452 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1454 if (!port || (port->wwpn != els_logo->nport_wwpn)) {
1455 ZFCP_LOG_DEBUG("ignored incoming LOGO for nonexisting port "
1456 "with d_id 0x%06x on adapter %s\n",
1457 status_buffer->d_id,
1458 zfcp_get_busid_by_adapter(adapter));
1460 zfcp_erp_port_forced_reopen(port, 0);
1465 zfcp_fsf_incoming_els_unknown(struct zfcp_adapter *adapter,
1466 struct fsf_status_read_buffer *status_buffer)
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));
1475 zfcp_fsf_incoming_els(struct zfcp_fsf_req *fsf_req)
1477 struct fsf_status_read_buffer *status_buffer;
1479 struct zfcp_adapter *adapter;
1481 status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
1482 els_type = *(u32 *) (status_buffer->payload);
1483 adapter = fsf_req->adapter;
1485 zfcp_san_dbf_event_incoming_els(fsf_req);
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);
1494 zfcp_fsf_incoming_els_unknown(adapter, status_buffer);
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
1504 zfcp_gid_pn_buffers_alloc(struct zfcp_gid_pn_data **gid_pn, mempool_t *pool)
1506 struct zfcp_gid_pn_data *data;
1509 data = mempool_alloc(pool, GFP_ATOMIC);
1510 if (likely(data != NULL)) {
1511 data->ct.pool = pool;
1514 data = kmem_cache_alloc(zfcp_data.gid_pn_cache, GFP_ATOMIC);
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);
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
1537 static void zfcp_gid_pn_buffers_free(struct zfcp_gid_pn_data *gid_pn)
1539 if (gid_pn->ct.pool)
1540 mempool_free(gid_pn, gid_pn->ct.pool);
1542 kmem_cache_free(zfcp_data.gid_pn_cache, gid_pn);
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
1550 zfcp_ns_gid_pn_request(struct zfcp_erp_action *erp_action)
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;
1557 ret = zfcp_gid_pn_buffers_alloc(&gid_pn, adapter->pool.data_gid_pn);
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));
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;
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;
1580 gid_pn->port = erp_action->port;
1582 ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp,
1585 ZFCP_LOG_INFO("error: initiation of gid_pn nameserver request "
1586 "failed for adapter %s\n",
1587 zfcp_get_busid_by_adapter(adapter));
1589 zfcp_gid_pn_buffers_free(gid_pn);
1597 * zfcp_ns_gid_pn_handler - handler for GID_PN nameserver request
1598 * @data: unsigned long, contains pointer to struct zfcp_gid_pn_data
1600 static void zfcp_ns_gid_pn_handler(unsigned long data)
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;
1609 gid_pn = (struct zfcp_gid_pn_data *) data;
1610 port = gid_pn->port;
1612 ct_iu_req = zfcp_sg_to_address(ct->req);
1613 ct_iu_resp = zfcp_sg_to_address(ct->resp);
1615 if (ct->status != 0)
1618 if (zfcp_check_ct_response(&ct_iu_resp->header)) {
1619 /* FIXME: do we need some specific erp entry points */
1620 atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status);
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));
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);
1635 ZFCP_LOG_DEBUG("adapter %s: wwpn=0x%016Lx ---> d_id=0x%06x\n",
1636 zfcp_get_busid_by_port(port), port->wwpn, port->d_id);
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));
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));
1651 zfcp_gid_pn_buffers_free(gid_pn);
1655 /* reject CT_IU reason codes acc. to FC-GS-4 */
1656 static 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"},
1671 /* LS_RJT reason codes acc. to FC-FS */
1672 static 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"},
1684 /* reject reason codes according to FC-PH/FC-FS */
1685 static 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"},
1725 * zfcp_rc_description - return description for given reaon code
1726 * @code: reason code
1727 * @rc_table: table of reason codes and descriptions
1730 zfcp_rc_description(u8 code, const struct zfcp_rc_entry *rc_table)
1732 const char *descr = "unknown reason code";
1735 if (code == rc_table->code) {
1736 descr = rc_table->description;
1740 } while (rc_table->code && rc_table->description);
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
1751 zfcp_check_ct_response(struct ct_hdr *rjt)
1753 if (rjt->cmd_rsp_code == ZFCP_CT_ACCEPT)
1756 if (rjt->cmd_rsp_code != ZFCP_CT_REJECT) {
1757 ZFCP_LOG_NORMAL("error: invalid Generic Service command/"
1758 "response code (0x%04hx)\n",
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);
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
1778 zfcp_print_els_rjt(struct zfcp_ls_rjt_par *rjt_par,
1779 const struct zfcp_rc_entry *rc_table)
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);
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
1794 zfcp_handle_els_rjt(u32 sq, struct zfcp_ls_rjt_par *rjt_par)
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);
1802 if (rjt_par->reason_code == 0x01)
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);
1808 if (rjt_par->reason_code == 0x01)
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);
1815 ZFCP_LOG_INFO("unexpected SQ: 0x%02x\n", sq);
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
1827 zfcp_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi)
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;
1841 #undef ZFCP_LOG_AREA