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 address = (void *) get_zeroed_page(GFP_KERNEL);
566 if (address == NULL) {
568 zfcp_sg_list_free(sg_list);
572 zfcp_address_to_sg(address, sg, min(size, PAGE_SIZE));
582 * zfcp_sg_list_free - free memory of a scatter-gather list
583 * @sg_list: structure describing a scatter-gather list
585 * Memory for each element in the scatter-gather list is freed.
586 * Finally sg_list->sg is freed itself and sg_list->count is reset.
589 zfcp_sg_list_free(struct zfcp_sg_list *sg_list)
591 struct scatterlist *sg;
594 BUG_ON(sg_list == NULL);
596 for (i = 0, sg = sg_list->sg; i < sg_list->count; i++, sg++)
597 free_page((unsigned long) zfcp_sg_to_address(sg));
604 * zfcp_sg_size - determine size of a scatter-gather list
605 * @sg: array of (struct scatterlist)
606 * @sg_count: elements in array
607 * Return: size of entire scatter-gather list
609 static size_t zfcp_sg_size(struct scatterlist *sg, unsigned int sg_count)
612 struct scatterlist *p;
616 for (i = 0, p = sg; i < sg_count; i++, p++) {
626 * zfcp_sg_list_copy_from_user -copy data from user space to scatter-gather list
627 * @sg_list: structure describing a scatter-gather list
628 * @user_buffer: pointer to buffer in user space
629 * @size: number of bytes to be copied
630 * Return: 0 on success, -EFAULT if copy_from_user fails.
633 zfcp_sg_list_copy_from_user(struct zfcp_sg_list *sg_list,
634 void __user *user_buffer,
637 struct scatterlist *sg;
642 BUG_ON(sg_list == NULL);
644 if (zfcp_sg_size(sg_list->sg, sg_list->count) < size)
647 for (sg = sg_list->sg; size > 0; sg++) {
648 length = min((unsigned int)size, sg->length);
649 zfcp_buffer = zfcp_sg_to_address(sg);
650 if (copy_from_user(zfcp_buffer, user_buffer, length)) {
654 user_buffer += length;
664 * zfcp_sg_list_copy_to_user - copy data from scatter-gather list to user space
665 * @user_buffer: pointer to buffer in user space
666 * @sg_list: structure describing a scatter-gather list
667 * @size: number of bytes to be copied
668 * Return: 0 on success, -EFAULT if copy_to_user fails
671 zfcp_sg_list_copy_to_user(void __user *user_buffer,
672 struct zfcp_sg_list *sg_list,
675 struct scatterlist *sg;
680 BUG_ON(sg_list == NULL);
682 if (zfcp_sg_size(sg_list->sg, sg_list->count) < size)
685 for (sg = sg_list->sg; size > 0; sg++) {
686 length = min((unsigned int) size, sg->length);
687 zfcp_buffer = zfcp_sg_to_address(sg);
688 if (copy_to_user(user_buffer, zfcp_buffer, length)) {
692 user_buffer += length;
703 /****************************************************************/
704 /****** Functions for configuration/set-up of structures ********/
705 /****************************************************************/
707 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_CONFIG
710 * zfcp_get_unit_by_lun - find unit in unit list of port by FCP LUN
711 * @port: pointer to port to search for unit
712 * @fcp_lun: FCP LUN to search for
713 * Traverse list of all units of a port and return pointer to a unit
714 * with the given FCP LUN.
717 zfcp_get_unit_by_lun(struct zfcp_port *port, fcp_lun_t fcp_lun)
719 struct zfcp_unit *unit;
722 list_for_each_entry(unit, &port->unit_list_head, list) {
723 if ((unit->fcp_lun == fcp_lun) &&
724 !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status))
730 return found ? unit : NULL;
734 * zfcp_get_port_by_wwpn - find port in port list of adapter by wwpn
735 * @adapter: pointer to adapter to search for port
736 * @wwpn: wwpn to search for
737 * Traverse list of all ports of an adapter and return pointer to a port
738 * with the given wwpn.
741 zfcp_get_port_by_wwpn(struct zfcp_adapter *adapter, wwn_t wwpn)
743 struct zfcp_port *port;
746 list_for_each_entry(port, &adapter->port_list_head, list) {
747 if ((port->wwpn == wwpn) &&
748 !(atomic_read(&port->status) &
749 (ZFCP_STATUS_PORT_NO_WWPN | ZFCP_STATUS_COMMON_REMOVE))) {
754 return found ? port : NULL;
758 * zfcp_get_port_by_did - find port in port list of adapter by d_id
759 * @adapter: pointer to adapter to search for port
760 * @d_id: d_id to search for
761 * Traverse list of all ports of an adapter and return pointer to a port
762 * with the given d_id.
765 zfcp_get_port_by_did(struct zfcp_adapter *adapter, u32 d_id)
767 struct zfcp_port *port;
770 list_for_each_entry(port, &adapter->port_list_head, list) {
771 if ((port->d_id == d_id) &&
772 !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status))
778 return found ? port : NULL;
782 * zfcp_get_adapter_by_busid - find adpater in adapter list by bus_id
783 * @bus_id: bus_id to search for
784 * Traverse list of all adapters and return pointer to an adapter
785 * with the given bus_id.
787 struct zfcp_adapter *
788 zfcp_get_adapter_by_busid(char *bus_id)
790 struct zfcp_adapter *adapter;
793 list_for_each_entry(adapter, &zfcp_data.adapter_list_head, list) {
794 if ((strncmp(bus_id, zfcp_get_busid_by_adapter(adapter),
795 BUS_ID_SIZE) == 0) &&
796 !atomic_test_mask(ZFCP_STATUS_COMMON_REMOVE,
802 return found ? adapter : NULL;
806 * zfcp_unit_enqueue - enqueue unit to unit list of a port.
807 * @port: pointer to port where unit is added
808 * @fcp_lun: FCP LUN of unit to be enqueued
809 * Return: pointer to enqueued unit on success, NULL on error
810 * Locks: config_sema must be held to serialize changes to the unit list
812 * Sets up some unit internal structures and creates sysfs entry.
815 zfcp_unit_enqueue(struct zfcp_port *port, fcp_lun_t fcp_lun)
817 struct zfcp_unit *unit;
820 * check that there is no unit with this FCP_LUN already in list
822 * Note: Unlike for the adapter and the port, this is an error
824 read_lock_irq(&zfcp_data.config_lock);
825 unit = zfcp_get_unit_by_lun(port, fcp_lun);
826 read_unlock_irq(&zfcp_data.config_lock);
830 unit = kzalloc(sizeof (struct zfcp_unit), GFP_KERNEL);
834 /* initialise reference count stuff */
835 atomic_set(&unit->refcount, 0);
836 init_waitqueue_head(&unit->remove_wq);
839 unit->fcp_lun = fcp_lun;
841 /* setup for sysfs registration */
842 snprintf(unit->sysfs_device.bus_id, BUS_ID_SIZE, "0x%016llx", fcp_lun);
843 unit->sysfs_device.parent = &port->sysfs_device;
844 unit->sysfs_device.release = zfcp_sysfs_unit_release;
845 dev_set_drvdata(&unit->sysfs_device, unit);
847 /* mark unit unusable as long as sysfs registration is not complete */
848 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
850 spin_lock_init(&unit->latencies.lock);
851 unit->latencies.write.channel.min = 0xFFFFFFFF;
852 unit->latencies.write.fabric.min = 0xFFFFFFFF;
853 unit->latencies.read.channel.min = 0xFFFFFFFF;
854 unit->latencies.read.fabric.min = 0xFFFFFFFF;
855 unit->latencies.cmd.channel.min = 0xFFFFFFFF;
856 unit->latencies.cmd.fabric.min = 0xFFFFFFFF;
858 if (device_register(&unit->sysfs_device)) {
863 if (zfcp_sysfs_unit_create_files(&unit->sysfs_device)) {
864 device_unregister(&unit->sysfs_device);
869 unit->scsi_lun = scsilun_to_int((struct scsi_lun *)&unit->fcp_lun);
871 write_lock_irq(&zfcp_data.config_lock);
872 list_add_tail(&unit->list, &port->unit_list_head);
873 atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &unit->status);
874 atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &unit->status);
875 write_unlock_irq(&zfcp_data.config_lock);
884 zfcp_unit_dequeue(struct zfcp_unit *unit)
886 zfcp_unit_wait(unit);
887 write_lock_irq(&zfcp_data.config_lock);
888 list_del(&unit->list);
889 write_unlock_irq(&zfcp_data.config_lock);
891 zfcp_port_put(unit->port);
892 zfcp_sysfs_unit_remove_files(&unit->sysfs_device);
893 device_unregister(&unit->sysfs_device);
897 * Allocates a combined QTCB/fsf_req buffer for erp actions and fcp/SCSI
899 * It also genrates fcp-nameserver request/response buffer and unsolicited
900 * status read fsf_req buffers.
902 * locks: must only be called with zfcp_data.config_sema taken
905 zfcp_allocate_low_mem_buffers(struct zfcp_adapter *adapter)
907 adapter->pool.fsf_req_erp =
908 mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ERP_NR,
909 zfcp_data.fsf_req_qtcb_cache);
910 if (!adapter->pool.fsf_req_erp)
913 adapter->pool.fsf_req_scsi =
914 mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_SCSI_NR,
915 zfcp_data.fsf_req_qtcb_cache);
916 if (!adapter->pool.fsf_req_scsi)
919 adapter->pool.fsf_req_abort =
920 mempool_create_slab_pool(ZFCP_POOL_FSF_REQ_ABORT_NR,
921 zfcp_data.fsf_req_qtcb_cache);
922 if (!adapter->pool.fsf_req_abort)
925 adapter->pool.fsf_req_status_read =
926 mempool_create_kmalloc_pool(ZFCP_POOL_STATUS_READ_NR,
927 sizeof(struct zfcp_fsf_req));
928 if (!adapter->pool.fsf_req_status_read)
931 adapter->pool.data_status_read =
932 mempool_create_slab_pool(ZFCP_POOL_STATUS_READ_NR,
933 zfcp_data.sr_buffer_cache);
934 if (!adapter->pool.data_status_read)
937 adapter->pool.data_gid_pn =
938 mempool_create_slab_pool(ZFCP_POOL_DATA_GID_PN_NR,
939 zfcp_data.gid_pn_cache);
940 if (!adapter->pool.data_gid_pn)
947 * zfcp_free_low_mem_buffers - free memory pools of an adapter
948 * @adapter: pointer to zfcp_adapter for which memory pools should be freed
949 * locking: zfcp_data.config_sema must be held
952 zfcp_free_low_mem_buffers(struct zfcp_adapter *adapter)
954 if (adapter->pool.fsf_req_erp)
955 mempool_destroy(adapter->pool.fsf_req_erp);
956 if (adapter->pool.fsf_req_scsi)
957 mempool_destroy(adapter->pool.fsf_req_scsi);
958 if (adapter->pool.fsf_req_abort)
959 mempool_destroy(adapter->pool.fsf_req_abort);
960 if (adapter->pool.fsf_req_status_read)
961 mempool_destroy(adapter->pool.fsf_req_status_read);
962 if (adapter->pool.data_status_read)
963 mempool_destroy(adapter->pool.data_status_read);
964 if (adapter->pool.data_gid_pn)
965 mempool_destroy(adapter->pool.data_gid_pn);
968 static void zfcp_dummy_release(struct device *dev)
974 * Enqueues an adapter at the end of the adapter list in the driver data.
975 * All adapter internal structures are set up.
976 * Proc-fs entries are also created.
978 * returns: 0 if a new adapter was successfully enqueued
979 * ZFCP_KNOWN if an adapter with this devno was already present
980 * -ENOMEM if alloc failed
981 * locks: config_sema must be held to serialise changes to the adapter list
983 struct zfcp_adapter *
984 zfcp_adapter_enqueue(struct ccw_device *ccw_device)
987 struct zfcp_adapter *adapter;
990 * Note: It is safe to release the list_lock, as any list changes
991 * are protected by the config_sema, which must be held to get here
994 /* try to allocate new adapter data structure (zeroed) */
995 adapter = kzalloc(sizeof (struct zfcp_adapter), GFP_KERNEL);
997 ZFCP_LOG_INFO("error: allocation of base adapter "
998 "structure failed\n");
1002 ccw_device->handler = NULL;
1004 /* save ccw_device pointer */
1005 adapter->ccw_device = ccw_device;
1007 retval = zfcp_qdio_allocate_queues(adapter);
1009 goto queues_alloc_failed;
1011 retval = zfcp_qdio_allocate(adapter);
1013 goto qdio_allocate_failed;
1015 retval = zfcp_allocate_low_mem_buffers(adapter);
1017 ZFCP_LOG_INFO("error: pool allocation failed\n");
1018 goto failed_low_mem_buffers;
1021 /* initialise reference count stuff */
1022 atomic_set(&adapter->refcount, 0);
1023 init_waitqueue_head(&adapter->remove_wq);
1025 /* initialise list of ports */
1026 INIT_LIST_HEAD(&adapter->port_list_head);
1028 /* initialise list of ports to be removed */
1029 INIT_LIST_HEAD(&adapter->port_remove_lh);
1031 /* initialize list of fsf requests */
1032 spin_lock_init(&adapter->req_list_lock);
1033 retval = zfcp_reqlist_alloc(adapter);
1035 ZFCP_LOG_INFO("request list initialization failed\n");
1036 goto failed_low_mem_buffers;
1039 /* initialize debug locks */
1041 spin_lock_init(&adapter->hba_dbf_lock);
1042 spin_lock_init(&adapter->san_dbf_lock);
1043 spin_lock_init(&adapter->scsi_dbf_lock);
1044 spin_lock_init(&adapter->rec_dbf_lock);
1046 retval = zfcp_adapter_debug_register(adapter);
1048 goto debug_register_failed;
1050 /* initialize error recovery stuff */
1052 rwlock_init(&adapter->erp_lock);
1053 sema_init(&adapter->erp_ready_sem, 0);
1054 INIT_LIST_HEAD(&adapter->erp_ready_head);
1055 INIT_LIST_HEAD(&adapter->erp_running_head);
1057 /* initialize abort lock */
1058 rwlock_init(&adapter->abort_lock);
1060 /* initialise some erp stuff */
1061 init_waitqueue_head(&adapter->erp_thread_wqh);
1062 init_waitqueue_head(&adapter->erp_done_wqh);
1064 /* initialize lock of associated request queue */
1065 rwlock_init(&adapter->request_queue.queue_lock);
1067 /* mark adapter unusable as long as sysfs registration is not complete */
1068 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
1070 dev_set_drvdata(&ccw_device->dev, adapter);
1072 if (zfcp_sysfs_adapter_create_files(&ccw_device->dev))
1075 adapter->generic_services.parent = &adapter->ccw_device->dev;
1076 adapter->generic_services.release = zfcp_dummy_release;
1077 snprintf(adapter->generic_services.bus_id, BUS_ID_SIZE,
1078 "generic_services");
1080 if (device_register(&adapter->generic_services))
1081 goto generic_services_failed;
1083 /* put allocated adapter at list tail */
1084 write_lock_irq(&zfcp_data.config_lock);
1085 atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &adapter->status);
1086 list_add_tail(&adapter->list, &zfcp_data.adapter_list_head);
1087 write_unlock_irq(&zfcp_data.config_lock);
1089 zfcp_data.adapters++;
1093 generic_services_failed:
1094 zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev);
1096 zfcp_adapter_debug_unregister(adapter);
1097 debug_register_failed:
1098 dev_set_drvdata(&ccw_device->dev, NULL);
1099 zfcp_reqlist_free(adapter);
1100 failed_low_mem_buffers:
1101 zfcp_free_low_mem_buffers(adapter);
1102 if (qdio_free(ccw_device) != 0)
1103 ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n",
1104 zfcp_get_busid_by_adapter(adapter));
1105 qdio_allocate_failed:
1106 zfcp_qdio_free_queues(adapter);
1107 queues_alloc_failed:
1115 * returns: 0 - struct zfcp_adapter data structure successfully removed
1116 * !0 - struct zfcp_adapter data structure could not be removed
1118 * locks: adapter list write lock is assumed to be held by caller
1121 zfcp_adapter_dequeue(struct zfcp_adapter *adapter)
1124 unsigned long flags;
1126 zfcp_adapter_scsi_unregister(adapter);
1127 device_unregister(&adapter->generic_services);
1128 zfcp_sysfs_adapter_remove_files(&adapter->ccw_device->dev);
1129 dev_set_drvdata(&adapter->ccw_device->dev, NULL);
1130 /* sanity check: no pending FSF requests */
1131 spin_lock_irqsave(&adapter->req_list_lock, flags);
1132 retval = zfcp_reqlist_isempty(adapter);
1133 spin_unlock_irqrestore(&adapter->req_list_lock, flags);
1135 ZFCP_LOG_NORMAL("bug: adapter %s (%p) still in use, "
1136 "%i requests outstanding\n",
1137 zfcp_get_busid_by_adapter(adapter), adapter,
1138 atomic_read(&adapter->reqs_active));
1143 zfcp_adapter_debug_unregister(adapter);
1145 /* remove specified adapter data structure from list */
1146 write_lock_irq(&zfcp_data.config_lock);
1147 list_del(&adapter->list);
1148 write_unlock_irq(&zfcp_data.config_lock);
1150 /* decrease number of adapters in list */
1151 zfcp_data.adapters--;
1153 ZFCP_LOG_TRACE("adapter %s (%p) removed from list, "
1154 "%i adapters still in list\n",
1155 zfcp_get_busid_by_adapter(adapter),
1156 adapter, zfcp_data.adapters);
1158 retval = qdio_free(adapter->ccw_device);
1160 ZFCP_LOG_NORMAL("bug: qdio_free for adapter %s failed\n",
1161 zfcp_get_busid_by_adapter(adapter));
1163 zfcp_free_low_mem_buffers(adapter);
1164 /* free memory of adapter data structure and queues */
1165 zfcp_qdio_free_queues(adapter);
1166 zfcp_reqlist_free(adapter);
1167 kfree(adapter->fc_stats);
1168 kfree(adapter->stats_reset_data);
1169 ZFCP_LOG_TRACE("freeing adapter structure\n");
1176 * zfcp_port_enqueue - enqueue port to port list of adapter
1177 * @adapter: adapter where remote port is added
1178 * @wwpn: WWPN of the remote port to be enqueued
1179 * @status: initial status for the port
1180 * @d_id: destination id of the remote port to be enqueued
1181 * Return: pointer to enqueued port on success, NULL on error
1182 * Locks: config_sema must be held to serialize changes to the port list
1184 * All port internal structures are set up and the sysfs entry is generated.
1185 * d_id is used to enqueue ports with a well known address like the Directory
1186 * Service for nameserver lookup.
1189 zfcp_port_enqueue(struct zfcp_adapter *adapter, wwn_t wwpn, u32 status,
1192 struct zfcp_port *port;
1195 check_wwpn = !(status & ZFCP_STATUS_PORT_NO_WWPN);
1197 * check that there is no port with this WWPN already in list
1200 read_lock_irq(&zfcp_data.config_lock);
1201 port = zfcp_get_port_by_wwpn(adapter, wwpn);
1202 read_unlock_irq(&zfcp_data.config_lock);
1207 port = kzalloc(sizeof (struct zfcp_port), GFP_KERNEL);
1211 /* initialise reference count stuff */
1212 atomic_set(&port->refcount, 0);
1213 init_waitqueue_head(&port->remove_wq);
1215 INIT_LIST_HEAD(&port->unit_list_head);
1216 INIT_LIST_HEAD(&port->unit_remove_lh);
1218 port->adapter = adapter;
1223 atomic_set_mask(status, &port->status);
1225 /* setup for sysfs registration */
1226 if (status & ZFCP_STATUS_PORT_WKA) {
1228 case ZFCP_DID_DIRECTORY_SERVICE:
1229 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1232 case ZFCP_DID_MANAGEMENT_SERVICE:
1233 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1236 case ZFCP_DID_KEY_DISTRIBUTION_SERVICE:
1237 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1238 "key_distribution");
1240 case ZFCP_DID_ALIAS_SERVICE:
1241 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1244 case ZFCP_DID_TIME_SERVICE:
1245 snprintf(port->sysfs_device.bus_id, BUS_ID_SIZE,
1253 port->sysfs_device.parent = &adapter->generic_services;
1255 snprintf(port->sysfs_device.bus_id,
1256 BUS_ID_SIZE, "0x%016llx", wwpn);
1257 port->sysfs_device.parent = &adapter->ccw_device->dev;
1259 port->sysfs_device.release = zfcp_sysfs_port_release;
1260 dev_set_drvdata(&port->sysfs_device, port);
1262 /* mark port unusable as long as sysfs registration is not complete */
1263 atomic_set_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
1265 if (device_register(&port->sysfs_device)) {
1270 if (zfcp_sysfs_port_create_files(&port->sysfs_device, status)) {
1271 device_unregister(&port->sysfs_device);
1275 zfcp_port_get(port);
1277 write_lock_irq(&zfcp_data.config_lock);
1278 list_add_tail(&port->list, &adapter->port_list_head);
1279 atomic_clear_mask(ZFCP_STATUS_COMMON_REMOVE, &port->status);
1280 atomic_set_mask(ZFCP_STATUS_COMMON_RUNNING, &port->status);
1281 if (d_id == ZFCP_DID_DIRECTORY_SERVICE)
1282 if (!adapter->nameserver_port)
1283 adapter->nameserver_port = port;
1285 write_unlock_irq(&zfcp_data.config_lock);
1287 zfcp_adapter_get(adapter);
1293 zfcp_port_dequeue(struct zfcp_port *port)
1295 zfcp_port_wait(port);
1296 write_lock_irq(&zfcp_data.config_lock);
1297 list_del(&port->list);
1298 port->adapter->ports--;
1299 write_unlock_irq(&zfcp_data.config_lock);
1301 fc_remote_port_delete(port->rport);
1303 zfcp_adapter_put(port->adapter);
1304 zfcp_sysfs_port_remove_files(&port->sysfs_device,
1305 atomic_read(&port->status));
1306 device_unregister(&port->sysfs_device);
1309 /* Enqueues a nameserver port */
1311 zfcp_nameserver_enqueue(struct zfcp_adapter *adapter)
1313 struct zfcp_port *port;
1315 port = zfcp_port_enqueue(adapter, 0, ZFCP_STATUS_PORT_WKA,
1316 ZFCP_DID_DIRECTORY_SERVICE);
1318 ZFCP_LOG_INFO("error: enqueue of nameserver port for "
1319 "adapter %s failed\n",
1320 zfcp_get_busid_by_adapter(adapter));
1323 zfcp_port_put(port);
1328 #undef ZFCP_LOG_AREA
1330 /****************************************************************/
1331 /******* Fibre Channel Standard related Functions **************/
1332 /****************************************************************/
1334 #define ZFCP_LOG_AREA ZFCP_LOG_AREA_FC
1336 static void zfcp_fsf_incoming_els_rscn(struct zfcp_fsf_req *fsf_req)
1338 struct fsf_status_read_buffer *status_buffer = (void*)fsf_req->data;
1339 struct zfcp_adapter *adapter = fsf_req->adapter;
1340 struct fcp_rscn_head *fcp_rscn_head;
1341 struct fcp_rscn_element *fcp_rscn_element;
1342 struct zfcp_port *port;
1346 unsigned long flags;
1348 fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload;
1349 fcp_rscn_element = (struct fcp_rscn_element *) status_buffer->payload;
1352 no_entries = (fcp_rscn_head->payload_len / 4);
1354 for (i = 1; i < no_entries; i++) {
1355 /* skip head and start with 1st element */
1357 switch (fcp_rscn_element->addr_format) {
1358 case ZFCP_PORT_ADDRESS:
1359 range_mask = ZFCP_PORTS_RANGE_PORT;
1361 case ZFCP_AREA_ADDRESS:
1362 range_mask = ZFCP_PORTS_RANGE_AREA;
1364 case ZFCP_DOMAIN_ADDRESS:
1365 range_mask = ZFCP_PORTS_RANGE_DOMAIN;
1367 case ZFCP_FABRIC_ADDRESS:
1368 range_mask = ZFCP_PORTS_RANGE_FABRIC;
1371 ZFCP_LOG_INFO("incoming RSCN with unknown "
1372 "address format\n");
1375 read_lock_irqsave(&zfcp_data.config_lock, flags);
1376 list_for_each_entry(port, &adapter->port_list_head, list) {
1377 if (atomic_test_mask
1378 (ZFCP_STATUS_PORT_WKA, &port->status))
1380 /* Do we know this port? If not skip it. */
1381 if (!atomic_test_mask
1382 (ZFCP_STATUS_PORT_DID_DID, &port->status)) {
1383 ZFCP_LOG_INFO("incoming RSCN, trying to open "
1384 "port 0x%016Lx\n", port->wwpn);
1385 zfcp_erp_port_reopen(port,
1386 ZFCP_STATUS_COMMON_ERP_FAILED,
1392 * FIXME: race: d_id might being invalidated
1393 * (...DID_DID reset)
1395 if ((port->d_id & range_mask)
1396 == (fcp_rscn_element->nport_did & range_mask)) {
1397 ZFCP_LOG_TRACE("reopen did 0x%08x\n",
1398 fcp_rscn_element->nport_did);
1400 * Unfortunately, an RSCN does not specify the
1401 * type of change a target underwent. We assume
1402 * that it makes sense to reopen the link.
1403 * FIXME: Shall we try to find out more about
1404 * the target and link state before closing it?
1405 * How to accomplish this? (nameserver?)
1406 * Where would such code be put in?
1407 * (inside or outside erp)
1409 ZFCP_LOG_INFO("incoming RSCN, trying to open "
1410 "port 0x%016Lx\n", port->wwpn);
1411 zfcp_test_link(port);
1414 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1418 static void zfcp_fsf_incoming_els_plogi(struct zfcp_fsf_req *fsf_req)
1420 struct fsf_status_read_buffer *status_buffer = (void*)fsf_req->data;
1421 struct zfcp_adapter *adapter = fsf_req->adapter;
1422 struct fsf_plogi *els_plogi;
1423 struct zfcp_port *port;
1424 unsigned long flags;
1426 els_plogi = (struct fsf_plogi *) status_buffer->payload;
1427 read_lock_irqsave(&zfcp_data.config_lock, flags);
1428 list_for_each_entry(port, &adapter->port_list_head, list) {
1429 if (port->wwpn == (*(wwn_t *) &els_plogi->serv_param.wwpn))
1432 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1434 if (!port || (port->wwpn != (*(wwn_t *) &els_plogi->serv_param.wwpn))) {
1435 ZFCP_LOG_DEBUG("ignored incoming PLOGI for nonexisting port "
1436 "with d_id 0x%06x on adapter %s\n",
1437 status_buffer->d_id,
1438 zfcp_get_busid_by_adapter(adapter));
1440 zfcp_erp_port_forced_reopen(port, 0, 83, fsf_req);
1444 static void zfcp_fsf_incoming_els_logo(struct zfcp_fsf_req *fsf_req)
1446 struct fsf_status_read_buffer *status_buffer = (void*)fsf_req->data;
1447 struct zfcp_adapter *adapter = fsf_req->adapter;
1448 struct fcp_logo *els_logo = (struct fcp_logo *) status_buffer->payload;
1449 struct zfcp_port *port;
1450 unsigned long flags;
1452 read_lock_irqsave(&zfcp_data.config_lock, flags);
1453 list_for_each_entry(port, &adapter->port_list_head, list) {
1454 if (port->wwpn == els_logo->nport_wwpn)
1457 read_unlock_irqrestore(&zfcp_data.config_lock, flags);
1459 if (!port || (port->wwpn != els_logo->nport_wwpn)) {
1460 ZFCP_LOG_DEBUG("ignored incoming LOGO for nonexisting port "
1461 "with d_id 0x%06x on adapter %s\n",
1462 status_buffer->d_id,
1463 zfcp_get_busid_by_adapter(adapter));
1465 zfcp_erp_port_forced_reopen(port, 0, 84, fsf_req);
1470 zfcp_fsf_incoming_els_unknown(struct zfcp_adapter *adapter,
1471 struct fsf_status_read_buffer *status_buffer)
1473 ZFCP_LOG_NORMAL("warning: unknown incoming ELS 0x%08x "
1474 "for adapter %s\n", *(u32 *) (status_buffer->payload),
1475 zfcp_get_busid_by_adapter(adapter));
1480 zfcp_fsf_incoming_els(struct zfcp_fsf_req *fsf_req)
1482 struct fsf_status_read_buffer *status_buffer;
1484 struct zfcp_adapter *adapter;
1486 status_buffer = (struct fsf_status_read_buffer *) fsf_req->data;
1487 els_type = *(u32 *) (status_buffer->payload);
1488 adapter = fsf_req->adapter;
1490 zfcp_san_dbf_event_incoming_els(fsf_req);
1491 if (els_type == LS_PLOGI)
1492 zfcp_fsf_incoming_els_plogi(fsf_req);
1493 else if (els_type == LS_LOGO)
1494 zfcp_fsf_incoming_els_logo(fsf_req);
1495 else if ((els_type & 0xffff0000) == LS_RSCN)
1496 /* we are only concerned with the command, not the length */
1497 zfcp_fsf_incoming_els_rscn(fsf_req);
1499 zfcp_fsf_incoming_els_unknown(adapter, status_buffer);
1504 * zfcp_gid_pn_buffers_alloc - allocate buffers for GID_PN nameserver request
1505 * @gid_pn: pointer to return pointer to struct zfcp_gid_pn_data
1506 * @pool: pointer to mempool_t if non-null memory pool is used for allocation
1509 zfcp_gid_pn_buffers_alloc(struct zfcp_gid_pn_data **gid_pn, mempool_t *pool)
1511 struct zfcp_gid_pn_data *data;
1514 data = mempool_alloc(pool, GFP_ATOMIC);
1515 if (likely(data != NULL)) {
1516 data->ct.pool = pool;
1519 data = kmem_cache_alloc(zfcp_data.gid_pn_cache, GFP_ATOMIC);
1525 memset(data, 0, sizeof(*data));
1526 sg_init_table(&data->req , 1);
1527 sg_init_table(&data->resp , 1);
1528 data->ct.req = &data->req;
1529 data->ct.resp = &data->resp;
1530 data->ct.req_count = data->ct.resp_count = 1;
1531 zfcp_address_to_sg(&data->ct_iu_req, &data->req, sizeof(struct ct_iu_gid_pn_req));
1532 zfcp_address_to_sg(&data->ct_iu_resp, &data->resp, sizeof(struct ct_iu_gid_pn_resp));
1539 * zfcp_gid_pn_buffers_free - free buffers for GID_PN nameserver request
1540 * @gid_pn: pointer to struct zfcp_gid_pn_data which has to be freed
1542 static void zfcp_gid_pn_buffers_free(struct zfcp_gid_pn_data *gid_pn)
1544 if (gid_pn->ct.pool)
1545 mempool_free(gid_pn, gid_pn->ct.pool);
1547 kmem_cache_free(zfcp_data.gid_pn_cache, gid_pn);
1551 * zfcp_ns_gid_pn_request - initiate GID_PN nameserver request
1552 * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed
1555 zfcp_ns_gid_pn_request(struct zfcp_erp_action *erp_action)
1558 struct ct_iu_gid_pn_req *ct_iu_req;
1559 struct zfcp_gid_pn_data *gid_pn;
1560 struct zfcp_adapter *adapter = erp_action->adapter;
1562 ret = zfcp_gid_pn_buffers_alloc(&gid_pn, adapter->pool.data_gid_pn);
1564 ZFCP_LOG_INFO("error: buffer allocation for gid_pn nameserver "
1565 "request failed for adapter %s\n",
1566 zfcp_get_busid_by_adapter(adapter));
1570 /* setup nameserver request */
1571 ct_iu_req = zfcp_sg_to_address(gid_pn->ct.req);
1572 ct_iu_req->header.revision = ZFCP_CT_REVISION;
1573 ct_iu_req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE;
1574 ct_iu_req->header.gs_subtype = ZFCP_CT_NAME_SERVER;
1575 ct_iu_req->header.options = ZFCP_CT_SYNCHRONOUS;
1576 ct_iu_req->header.cmd_rsp_code = ZFCP_CT_GID_PN;
1577 ct_iu_req->header.max_res_size = ZFCP_CT_MAX_SIZE;
1578 ct_iu_req->wwpn = erp_action->port->wwpn;
1580 /* setup parameters for send generic command */
1581 gid_pn->ct.port = adapter->nameserver_port;
1582 gid_pn->ct.handler = zfcp_ns_gid_pn_handler;
1583 gid_pn->ct.handler_data = (unsigned long) gid_pn;
1584 gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT;
1585 gid_pn->port = erp_action->port;
1587 ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp,
1590 ZFCP_LOG_INFO("error: initiation of gid_pn nameserver request "
1591 "failed for adapter %s\n",
1592 zfcp_get_busid_by_adapter(adapter));
1594 zfcp_gid_pn_buffers_free(gid_pn);
1602 * zfcp_ns_gid_pn_handler - handler for GID_PN nameserver request
1603 * @data: unsigned long, contains pointer to struct zfcp_gid_pn_data
1605 static void zfcp_ns_gid_pn_handler(unsigned long data)
1607 struct zfcp_port *port;
1608 struct zfcp_send_ct *ct;
1609 struct ct_iu_gid_pn_req *ct_iu_req;
1610 struct ct_iu_gid_pn_resp *ct_iu_resp;
1611 struct zfcp_gid_pn_data *gid_pn;
1614 gid_pn = (struct zfcp_gid_pn_data *) data;
1615 port = gid_pn->port;
1617 ct_iu_req = zfcp_sg_to_address(ct->req);
1618 ct_iu_resp = zfcp_sg_to_address(ct->resp);
1620 if (ct->status != 0)
1623 if (zfcp_check_ct_response(&ct_iu_resp->header)) {
1624 /* FIXME: do we need some specific erp entry points */
1625 atomic_set_mask(ZFCP_STATUS_PORT_INVALID_WWPN, &port->status);
1629 if (ct_iu_req->wwpn != port->wwpn) {
1630 ZFCP_LOG_NORMAL("bug: wwpn 0x%016Lx returned by nameserver "
1631 "lookup does not match expected wwpn 0x%016Lx "
1632 "for adapter %s\n", ct_iu_req->wwpn, port->wwpn,
1633 zfcp_get_busid_by_port(port));
1637 /* looks like a valid d_id */
1638 port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK;
1639 atomic_set_mask(ZFCP_STATUS_PORT_DID_DID, &port->status);
1640 ZFCP_LOG_DEBUG("adapter %s: wwpn=0x%016Lx ---> d_id=0x%06x\n",
1641 zfcp_get_busid_by_port(port), port->wwpn, port->d_id);
1645 ZFCP_LOG_DEBUG("CT IUs do not match:\n");
1646 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_req,
1647 sizeof(struct ct_iu_gid_pn_req));
1648 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG, (char *) ct_iu_resp,
1649 sizeof(struct ct_iu_gid_pn_resp));
1652 ZFCP_LOG_NORMAL("warning: failed gid_pn nameserver request for wwpn "
1653 "0x%016Lx for adapter %s\n",
1654 port->wwpn, zfcp_get_busid_by_port(port));
1656 zfcp_gid_pn_buffers_free(gid_pn);
1660 /* reject CT_IU reason codes acc. to FC-GS-4 */
1661 static const struct zfcp_rc_entry zfcp_ct_rc[] = {
1662 {0x01, "invalid command code"},
1663 {0x02, "invalid version level"},
1664 {0x03, "logical error"},
1665 {0x04, "invalid CT_IU size"},
1666 {0x05, "logical busy"},
1667 {0x07, "protocol error"},
1668 {0x09, "unable to perform command request"},
1669 {0x0b, "command not supported"},
1670 {0x0d, "server not available"},
1671 {0x0e, "session could not be established"},
1672 {0xff, "vendor specific error"},
1676 /* LS_RJT reason codes acc. to FC-FS */
1677 static const struct zfcp_rc_entry zfcp_ls_rjt_rc[] = {
1678 {0x01, "invalid LS_Command code"},
1679 {0x03, "logical error"},
1680 {0x05, "logical busy"},
1681 {0x07, "protocol error"},
1682 {0x09, "unable to perform command request"},
1683 {0x0b, "command not supported"},
1684 {0x0e, "command already in progress"},
1685 {0xff, "vendor specific error"},
1689 /* reject reason codes according to FC-PH/FC-FS */
1690 static const struct zfcp_rc_entry zfcp_p_rjt_rc[] = {
1691 {0x01, "invalid D_ID"},
1692 {0x02, "invalid S_ID"},
1693 {0x03, "Nx_Port not available, temporary"},
1694 {0x04, "Nx_Port not available, permament"},
1695 {0x05, "class not supported"},
1696 {0x06, "delimiter usage error"},
1697 {0x07, "TYPE not supported"},
1698 {0x08, "invalid Link_Control"},
1699 {0x09, "invalid R_CTL field"},
1700 {0x0a, "invalid F_CTL field"},
1701 {0x0b, "invalid OX_ID"},
1702 {0x0c, "invalid RX_ID"},
1703 {0x0d, "invalid SEQ_ID"},
1704 {0x0e, "invalid DF_CTL"},
1705 {0x0f, "invalid SEQ_CNT"},
1706 {0x10, "invalid parameter field"},
1707 {0x11, "exchange error"},
1708 {0x12, "protocol error"},
1709 {0x13, "incorrect length"},
1710 {0x14, "unsupported ACK"},
1711 {0x15, "class of service not supported by entity at FFFFFE"},
1712 {0x16, "login required"},
1713 {0x17, "excessive sequences attempted"},
1714 {0x18, "unable to establish exchange"},
1715 {0x1a, "fabric path not available"},
1716 {0x1b, "invalid VC_ID (class 4)"},
1717 {0x1c, "invalid CS_CTL field"},
1718 {0x1d, "insufficient resources for VC (class 4)"},
1719 {0x1f, "invalid class of service"},
1720 {0x20, "preemption request rejected"},
1721 {0x21, "preemption not enabled"},
1722 {0x22, "multicast error"},
1723 {0x23, "multicast error terminate"},
1724 {0x24, "process login required"},
1725 {0xff, "vendor specific reject"},
1730 * zfcp_rc_description - return description for given reaon code
1731 * @code: reason code
1732 * @rc_table: table of reason codes and descriptions
1735 zfcp_rc_description(u8 code, const struct zfcp_rc_entry *rc_table)
1737 const char *descr = "unknown reason code";
1740 if (code == rc_table->code) {
1741 descr = rc_table->description;
1745 } while (rc_table->code && rc_table->description);
1751 * zfcp_check_ct_response - evaluate reason code for CT_IU
1752 * @rjt: response payload to an CT_IU request
1753 * Return: 0 for accept CT_IU, 1 for reject CT_IU or invlid response code
1756 zfcp_check_ct_response(struct ct_hdr *rjt)
1758 if (rjt->cmd_rsp_code == ZFCP_CT_ACCEPT)
1761 if (rjt->cmd_rsp_code != ZFCP_CT_REJECT) {
1762 ZFCP_LOG_NORMAL("error: invalid Generic Service command/"
1763 "response code (0x%04hx)\n",
1768 ZFCP_LOG_INFO("Generic Service command rejected\n");
1769 ZFCP_LOG_INFO("%s (0x%02x, 0x%02x, 0x%02x)\n",
1770 zfcp_rc_description(rjt->reason_code, zfcp_ct_rc),
1771 (u32) rjt->reason_code, (u32) rjt->reason_code_expl,
1772 (u32) rjt->vendor_unique);
1778 * zfcp_print_els_rjt - print reject parameter and description for ELS reject
1779 * @rjt_par: reject parameter acc. to FC-PH/FC-FS
1780 * @rc_table: table of reason codes and descriptions
1783 zfcp_print_els_rjt(struct zfcp_ls_rjt_par *rjt_par,
1784 const struct zfcp_rc_entry *rc_table)
1786 ZFCP_LOG_INFO("%s (%02x %02x %02x %02x)\n",
1787 zfcp_rc_description(rjt_par->reason_code, rc_table),
1788 (u32) rjt_par->action, (u32) rjt_par->reason_code,
1789 (u32) rjt_par->reason_expl, (u32) rjt_par->vendor_unique);
1793 * zfcp_fsf_handle_els_rjt - evaluate status qualifier/reason code on ELS reject
1794 * @sq: status qualifier word
1795 * @rjt_par: reject parameter as described in FC-PH and FC-FS
1796 * Return: -EROMTEIO for LS_RJT, -EREMCHG for invalid D_ID, -EIO else
1799 zfcp_handle_els_rjt(u32 sq, struct zfcp_ls_rjt_par *rjt_par)
1803 if (sq == FSF_IOSTAT_NPORT_RJT) {
1804 ZFCP_LOG_INFO("ELS rejected (P_RJT)\n");
1805 zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc);
1807 if (rjt_par->reason_code == 0x01)
1809 } else if (sq == FSF_IOSTAT_FABRIC_RJT) {
1810 ZFCP_LOG_INFO("ELS rejected (F_RJT)\n");
1811 zfcp_print_els_rjt(rjt_par, zfcp_p_rjt_rc);
1813 if (rjt_par->reason_code == 0x01)
1815 } else if (sq == FSF_IOSTAT_LS_RJT) {
1816 ZFCP_LOG_INFO("ELS rejected (LS_RJT)\n");
1817 zfcp_print_els_rjt(rjt_par, zfcp_ls_rjt_rc);
1820 ZFCP_LOG_INFO("unexpected SQ: 0x%02x\n", sq);
1826 * zfcp_plogi_evaluate - evaluate PLOGI playload and copy important fields
1827 * into zfcp_port structure
1828 * @port: zfcp_port structure
1829 * @plogi: plogi payload
1832 zfcp_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi)
1834 port->maxframe_size = plogi->serv_param.common_serv_param[7] |
1835 ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8);
1836 if (plogi->serv_param.class1_serv_param[0] & 0x80)
1837 port->supported_classes |= FC_COS_CLASS1;
1838 if (plogi->serv_param.class2_serv_param[0] & 0x80)
1839 port->supported_classes |= FC_COS_CLASS2;
1840 if (plogi->serv_param.class3_serv_param[0] & 0x80)
1841 port->supported_classes |= FC_COS_CLASS3;
1842 if (plogi->serv_param.class4_serv_param[0] & 0x80)
1843 port->supported_classes |= FC_COS_CLASS4;
1846 #undef ZFCP_LOG_AREA