4 * Fibre Channel related functions for the zfcp device driver.
6 * Copyright IBM Corp. 2008, 2010
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12 #include <linux/types.h>
13 #include <linux/slab.h>
14 #include <linux/utsname.h>
15 #include <linux/random.h>
16 #include <scsi/fc/fc_els.h>
17 #include <scsi/libfc.h>
21 struct kmem_cache *zfcp_fc_req_cache;
23 static u32 zfcp_fc_rscn_range_mask[] = {
24 [ELS_ADDR_FMT_PORT] = 0xFFFFFF,
25 [ELS_ADDR_FMT_AREA] = 0xFFFF00,
26 [ELS_ADDR_FMT_DOM] = 0xFF0000,
27 [ELS_ADDR_FMT_FAB] = 0x000000,
30 static bool no_auto_port_rescan;
31 module_param_named(no_auto_port_rescan, no_auto_port_rescan, bool, 0600);
32 MODULE_PARM_DESC(no_auto_port_rescan,
33 "no automatic port_rescan (default off)");
35 static unsigned int port_scan_backoff = 500;
36 module_param(port_scan_backoff, uint, 0600);
37 MODULE_PARM_DESC(port_scan_backoff,
38 "upper limit of port scan random backoff in msecs (default 500)");
40 static unsigned int port_scan_ratelimit = 60000;
41 module_param(port_scan_ratelimit, uint, 0600);
42 MODULE_PARM_DESC(port_scan_ratelimit,
43 "minimum interval between port scans in msecs (default 60000)");
45 unsigned int zfcp_fc_port_scan_backoff(void)
47 if (!port_scan_backoff)
49 return get_random_int() % port_scan_backoff;
52 static void zfcp_fc_port_scan_time(struct zfcp_adapter *adapter)
54 unsigned long interval = msecs_to_jiffies(port_scan_ratelimit);
55 unsigned long backoff = msecs_to_jiffies(zfcp_fc_port_scan_backoff());
57 adapter->next_port_scan = jiffies + interval + backoff;
60 static void zfcp_fc_port_scan(struct zfcp_adapter *adapter)
62 unsigned long now = jiffies;
63 unsigned long next = adapter->next_port_scan;
64 unsigned long delay = 0, max;
66 /* delay only needed within waiting period */
67 if (time_before(now, next)) {
69 /* paranoia: never ever delay scans longer than specified */
70 max = msecs_to_jiffies(port_scan_ratelimit + port_scan_backoff);
71 delay = min(delay, max);
74 queue_delayed_work(adapter->work_queue, &adapter->scan_work, delay);
77 void zfcp_fc_conditional_port_scan(struct zfcp_adapter *adapter)
79 if (no_auto_port_rescan)
82 zfcp_fc_port_scan(adapter);
85 void zfcp_fc_inverse_conditional_port_scan(struct zfcp_adapter *adapter)
87 if (!no_auto_port_rescan)
90 zfcp_fc_port_scan(adapter);
94 * zfcp_fc_post_event - post event to userspace via fc_transport
95 * @work: work struct with enqueued events
97 void zfcp_fc_post_event(struct work_struct *work)
99 struct zfcp_fc_event *event = NULL, *tmp = NULL;
101 struct zfcp_fc_events *events = container_of(work,
102 struct zfcp_fc_events, work);
103 struct zfcp_adapter *adapter = container_of(events, struct zfcp_adapter,
106 spin_lock_bh(&events->list_lock);
107 list_splice_init(&events->list, &tmp_lh);
108 spin_unlock_bh(&events->list_lock);
110 list_for_each_entry_safe(event, tmp, &tmp_lh, list) {
111 fc_host_post_event(adapter->scsi_host, fc_get_event_number(),
112 event->code, event->data);
113 list_del(&event->list);
120 * zfcp_fc_enqueue_event - safely enqueue FC HBA API event from irq context
121 * @adapter: The adapter where to enqueue the event
122 * @event_code: The event code (as defined in fc_host_event_code in
123 * scsi_transport_fc.h)
124 * @event_data: The event data (e.g. n_port page in case of els)
126 void zfcp_fc_enqueue_event(struct zfcp_adapter *adapter,
127 enum fc_host_event_code event_code, u32 event_data)
129 struct zfcp_fc_event *event;
131 event = kmalloc(sizeof(struct zfcp_fc_event), GFP_ATOMIC);
135 event->code = event_code;
136 event->data = event_data;
138 spin_lock(&adapter->events.list_lock);
139 list_add_tail(&event->list, &adapter->events.list);
140 spin_unlock(&adapter->events.list_lock);
142 queue_work(adapter->work_queue, &adapter->events.work);
145 static int zfcp_fc_wka_port_get(struct zfcp_fc_wka_port *wka_port)
147 if (mutex_lock_interruptible(&wka_port->mutex))
150 if (wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE ||
151 wka_port->status == ZFCP_FC_WKA_PORT_CLOSING) {
152 wka_port->status = ZFCP_FC_WKA_PORT_OPENING;
153 if (zfcp_fsf_open_wka_port(wka_port))
154 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
157 mutex_unlock(&wka_port->mutex);
159 wait_event(wka_port->completion_wq,
160 wka_port->status == ZFCP_FC_WKA_PORT_ONLINE ||
161 wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE);
163 if (wka_port->status == ZFCP_FC_WKA_PORT_ONLINE) {
164 atomic_inc(&wka_port->refcount);
170 static void zfcp_fc_wka_port_offline(struct work_struct *work)
172 struct delayed_work *dw = to_delayed_work(work);
173 struct zfcp_fc_wka_port *wka_port =
174 container_of(dw, struct zfcp_fc_wka_port, work);
176 mutex_lock(&wka_port->mutex);
177 if ((atomic_read(&wka_port->refcount) != 0) ||
178 (wka_port->status != ZFCP_FC_WKA_PORT_ONLINE))
181 wka_port->status = ZFCP_FC_WKA_PORT_CLOSING;
182 if (zfcp_fsf_close_wka_port(wka_port)) {
183 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
184 wake_up(&wka_port->completion_wq);
187 mutex_unlock(&wka_port->mutex);
190 static void zfcp_fc_wka_port_put(struct zfcp_fc_wka_port *wka_port)
192 if (atomic_dec_return(&wka_port->refcount) != 0)
194 /* wait 10 milliseconds, other reqs might pop in */
195 schedule_delayed_work(&wka_port->work, HZ / 100);
198 static void zfcp_fc_wka_port_init(struct zfcp_fc_wka_port *wka_port, u32 d_id,
199 struct zfcp_adapter *adapter)
201 init_waitqueue_head(&wka_port->completion_wq);
203 wka_port->adapter = adapter;
204 wka_port->d_id = d_id;
206 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
207 atomic_set(&wka_port->refcount, 0);
208 mutex_init(&wka_port->mutex);
209 INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline);
212 static void zfcp_fc_wka_port_force_offline(struct zfcp_fc_wka_port *wka)
214 cancel_delayed_work_sync(&wka->work);
215 mutex_lock(&wka->mutex);
216 wka->status = ZFCP_FC_WKA_PORT_OFFLINE;
217 mutex_unlock(&wka->mutex);
220 void zfcp_fc_wka_ports_force_offline(struct zfcp_fc_wka_ports *gs)
224 zfcp_fc_wka_port_force_offline(&gs->ms);
225 zfcp_fc_wka_port_force_offline(&gs->ts);
226 zfcp_fc_wka_port_force_offline(&gs->ds);
227 zfcp_fc_wka_port_force_offline(&gs->as);
230 static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range,
231 struct fc_els_rscn_page *page)
234 struct zfcp_adapter *adapter = fsf_req->adapter;
235 struct zfcp_port *port;
237 read_lock_irqsave(&adapter->port_list_lock, flags);
238 list_for_each_entry(port, &adapter->port_list, list) {
239 if ((port->d_id & range) == (ntoh24(page->rscn_fid) & range))
240 zfcp_fc_test_link(port);
242 read_unlock_irqrestore(&adapter->port_list_lock, flags);
245 static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req)
247 struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data;
248 struct zfcp_adapter *adapter = fsf_req->adapter;
249 struct fc_els_rscn *head;
250 struct fc_els_rscn_page *page;
255 head = (struct fc_els_rscn *) status_buffer->payload.data;
256 page = (struct fc_els_rscn_page *) head;
259 no_entries = head->rscn_plen / sizeof(struct fc_els_rscn_page);
261 if (no_entries > 1) {
262 /* handle failed ports */
264 struct zfcp_port *port;
266 read_lock_irqsave(&adapter->port_list_lock, flags);
267 list_for_each_entry(port, &adapter->port_list, list) {
270 zfcp_erp_port_reopen(port,
271 ZFCP_STATUS_COMMON_ERP_FAILED,
274 read_unlock_irqrestore(&adapter->port_list_lock, flags);
277 for (i = 1; i < no_entries; i++) {
278 /* skip head and start with 1st element */
280 afmt = page->rscn_page_flags & ELS_RSCN_ADDR_FMT_MASK;
281 _zfcp_fc_incoming_rscn(fsf_req, zfcp_fc_rscn_range_mask[afmt],
283 zfcp_fc_enqueue_event(fsf_req->adapter, FCH_EVT_RSCN,
286 zfcp_fc_conditional_port_scan(fsf_req->adapter);
289 static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn)
292 struct zfcp_adapter *adapter = req->adapter;
293 struct zfcp_port *port;
295 read_lock_irqsave(&adapter->port_list_lock, flags);
296 list_for_each_entry(port, &adapter->port_list, list)
297 if (port->wwpn == wwpn) {
298 zfcp_erp_port_forced_reopen(port, 0, "fciwwp1");
301 read_unlock_irqrestore(&adapter->port_list_lock, flags);
304 static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req)
306 struct fsf_status_read_buffer *status_buffer;
307 struct fc_els_flogi *plogi;
309 status_buffer = (struct fsf_status_read_buffer *) req->data;
310 plogi = (struct fc_els_flogi *) status_buffer->payload.data;
311 zfcp_fc_incoming_wwpn(req, plogi->fl_wwpn);
314 static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req)
316 struct fsf_status_read_buffer *status_buffer =
317 (struct fsf_status_read_buffer *)req->data;
318 struct fc_els_logo *logo =
319 (struct fc_els_logo *) status_buffer->payload.data;
321 zfcp_fc_incoming_wwpn(req, logo->fl_n_port_wwn);
325 * zfcp_fc_incoming_els - handle incoming ELS
326 * @fsf_req - request which contains incoming ELS
328 void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req)
330 struct fsf_status_read_buffer *status_buffer =
331 (struct fsf_status_read_buffer *) fsf_req->data;
332 unsigned int els_type = status_buffer->payload.data[0];
334 zfcp_dbf_san_in_els("fciels1", fsf_req);
335 if (els_type == ELS_PLOGI)
336 zfcp_fc_incoming_plogi(fsf_req);
337 else if (els_type == ELS_LOGO)
338 zfcp_fc_incoming_logo(fsf_req);
339 else if (els_type == ELS_RSCN)
340 zfcp_fc_incoming_rscn(fsf_req);
343 static void zfcp_fc_ns_gid_pn_eval(struct zfcp_fc_req *fc_req)
345 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
346 struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp;
350 if (gid_pn_rsp->ct_hdr.ct_cmd != FC_FS_ACC)
353 /* looks like a valid d_id */
354 ct_els->port->d_id = ntoh24(gid_pn_rsp->gid_pn.fp_fid);
357 static void zfcp_fc_complete(void *data)
362 static void zfcp_fc_ct_ns_init(struct fc_ct_hdr *ct_hdr, u16 cmd, u16 mr_size)
364 ct_hdr->ct_rev = FC_CT_REV;
365 ct_hdr->ct_fs_type = FC_FST_DIR;
366 ct_hdr->ct_fs_subtype = FC_NS_SUBTYPE;
367 ct_hdr->ct_cmd = cmd;
368 ct_hdr->ct_mr_size = mr_size / 4;
371 static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port,
372 struct zfcp_fc_req *fc_req)
374 struct zfcp_adapter *adapter = port->adapter;
375 DECLARE_COMPLETION_ONSTACK(completion);
376 struct zfcp_fc_gid_pn_req *gid_pn_req = &fc_req->u.gid_pn.req;
377 struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp;
380 /* setup parameters for send generic command */
381 fc_req->ct_els.port = port;
382 fc_req->ct_els.handler = zfcp_fc_complete;
383 fc_req->ct_els.handler_data = &completion;
384 fc_req->ct_els.req = &fc_req->sg_req;
385 fc_req->ct_els.resp = &fc_req->sg_rsp;
386 sg_init_one(&fc_req->sg_req, gid_pn_req, sizeof(*gid_pn_req));
387 sg_init_one(&fc_req->sg_rsp, gid_pn_rsp, sizeof(*gid_pn_rsp));
389 zfcp_fc_ct_ns_init(&gid_pn_req->ct_hdr,
390 FC_NS_GID_PN, ZFCP_FC_CT_SIZE_PAGE);
391 gid_pn_req->gid_pn.fn_wwpn = port->wwpn;
393 ret = zfcp_fsf_send_ct(&adapter->gs->ds, &fc_req->ct_els,
394 adapter->pool.gid_pn_req,
397 wait_for_completion(&completion);
398 zfcp_fc_ns_gid_pn_eval(fc_req);
404 * zfcp_fc_ns_gid_pn - initiate GID_PN nameserver request
405 * @port: port where GID_PN request is needed
406 * return: -ENOMEM on error, 0 otherwise
408 static int zfcp_fc_ns_gid_pn(struct zfcp_port *port)
411 struct zfcp_fc_req *fc_req;
412 struct zfcp_adapter *adapter = port->adapter;
414 fc_req = mempool_alloc(adapter->pool.gid_pn, GFP_ATOMIC);
418 memset(fc_req, 0, sizeof(*fc_req));
420 ret = zfcp_fc_wka_port_get(&adapter->gs->ds);
424 ret = zfcp_fc_ns_gid_pn_request(port, fc_req);
426 zfcp_fc_wka_port_put(&adapter->gs->ds);
428 mempool_free(fc_req, adapter->pool.gid_pn);
432 void zfcp_fc_port_did_lookup(struct work_struct *work)
435 struct zfcp_port *port = container_of(work, struct zfcp_port,
438 ret = zfcp_fc_ns_gid_pn(port);
440 /* could not issue gid_pn for some reason */
441 zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1");
446 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED);
450 zfcp_erp_port_reopen(port, 0, "fcgpn_3");
452 put_device(&port->dev);
456 * zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request
457 * @port: The zfcp_port to lookup the d_id for.
459 void zfcp_fc_trigger_did_lookup(struct zfcp_port *port)
461 get_device(&port->dev);
462 if (!queue_work(port->adapter->work_queue, &port->gid_pn_work))
463 put_device(&port->dev);
467 * zfcp_fc_plogi_evaluate - evaluate PLOGI playload
468 * @port: zfcp_port structure
469 * @plogi: plogi payload
471 * Evaluate PLOGI playload and copy important fields into zfcp_port structure
473 void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fc_els_flogi *plogi)
475 if (plogi->fl_wwpn != port->wwpn) {
477 dev_warn(&port->adapter->ccw_device->dev,
478 "A port opened with WWPN 0x%016Lx returned data that "
479 "identifies it as WWPN 0x%016Lx\n",
480 (unsigned long long) port->wwpn,
481 (unsigned long long) plogi->fl_wwpn);
485 port->wwnn = plogi->fl_wwnn;
486 port->maxframe_size = plogi->fl_csp.sp_bb_data;
488 if (plogi->fl_cssp[0].cp_class & FC_CPC_VALID)
489 port->supported_classes |= FC_COS_CLASS1;
490 if (plogi->fl_cssp[1].cp_class & FC_CPC_VALID)
491 port->supported_classes |= FC_COS_CLASS2;
492 if (plogi->fl_cssp[2].cp_class & FC_CPC_VALID)
493 port->supported_classes |= FC_COS_CLASS3;
494 if (plogi->fl_cssp[3].cp_class & FC_CPC_VALID)
495 port->supported_classes |= FC_COS_CLASS4;
498 static void zfcp_fc_adisc_handler(void *data)
500 struct zfcp_fc_req *fc_req = data;
501 struct zfcp_port *port = fc_req->ct_els.port;
502 struct fc_els_adisc *adisc_resp = &fc_req->u.adisc.rsp;
504 if (fc_req->ct_els.status) {
505 /* request rejected or timed out */
506 zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
512 port->wwnn = adisc_resp->adisc_wwnn;
514 if ((port->wwpn != adisc_resp->adisc_wwpn) ||
515 !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) {
516 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
521 /* port is good, unblock rport without going through erp */
522 zfcp_scsi_schedule_rport_register(port);
524 atomic_andnot(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
525 put_device(&port->dev);
526 kmem_cache_free(zfcp_fc_req_cache, fc_req);
529 static int zfcp_fc_adisc(struct zfcp_port *port)
531 struct zfcp_fc_req *fc_req;
532 struct zfcp_adapter *adapter = port->adapter;
533 struct Scsi_Host *shost = adapter->scsi_host;
536 fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_ATOMIC);
540 fc_req->ct_els.port = port;
541 fc_req->ct_els.req = &fc_req->sg_req;
542 fc_req->ct_els.resp = &fc_req->sg_rsp;
543 sg_init_one(&fc_req->sg_req, &fc_req->u.adisc.req,
544 sizeof(struct fc_els_adisc));
545 sg_init_one(&fc_req->sg_rsp, &fc_req->u.adisc.rsp,
546 sizeof(struct fc_els_adisc));
548 fc_req->ct_els.handler = zfcp_fc_adisc_handler;
549 fc_req->ct_els.handler_data = fc_req;
551 /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports
552 without FC-AL-2 capability, so we don't set it */
553 fc_req->u.adisc.req.adisc_wwpn = fc_host_port_name(shost);
554 fc_req->u.adisc.req.adisc_wwnn = fc_host_node_name(shost);
555 fc_req->u.adisc.req.adisc_cmd = ELS_ADISC;
556 hton24(fc_req->u.adisc.req.adisc_port_id, fc_host_port_id(shost));
558 ret = zfcp_fsf_send_els(adapter, port->d_id, &fc_req->ct_els,
561 kmem_cache_free(zfcp_fc_req_cache, fc_req);
566 void zfcp_fc_link_test_work(struct work_struct *work)
568 struct zfcp_port *port =
569 container_of(work, struct zfcp_port, test_link_work);
572 get_device(&port->dev);
573 port->rport_task = RPORT_DEL;
574 zfcp_scsi_rport_work(&port->rport_work);
576 /* only issue one test command at one time per port */
577 if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST)
580 atomic_or(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
582 retval = zfcp_fc_adisc(port);
586 /* send of ADISC was not possible */
587 atomic_andnot(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
588 zfcp_erp_port_forced_reopen(port, 0, "fcltwk1");
591 put_device(&port->dev);
595 * zfcp_fc_test_link - lightweight link test procedure
596 * @port: port to be tested
598 * Test status of a link to a remote port using the ELS command ADISC.
599 * If there is a problem with the remote port, error recovery steps
602 void zfcp_fc_test_link(struct zfcp_port *port)
604 get_device(&port->dev);
605 if (!queue_work(port->adapter->work_queue, &port->test_link_work))
606 put_device(&port->dev);
609 static struct zfcp_fc_req *zfcp_alloc_sg_env(int buf_num)
611 struct zfcp_fc_req *fc_req;
613 fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL);
617 if (zfcp_sg_setup_table(&fc_req->sg_rsp, buf_num)) {
618 kmem_cache_free(zfcp_fc_req_cache, fc_req);
622 sg_init_one(&fc_req->sg_req, &fc_req->u.gpn_ft.req,
623 sizeof(struct zfcp_fc_gpn_ft_req));
628 static int zfcp_fc_send_gpn_ft(struct zfcp_fc_req *fc_req,
629 struct zfcp_adapter *adapter, int max_bytes)
631 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
632 struct zfcp_fc_gpn_ft_req *req = &fc_req->u.gpn_ft.req;
633 DECLARE_COMPLETION_ONSTACK(completion);
636 zfcp_fc_ct_ns_init(&req->ct_hdr, FC_NS_GPN_FT, max_bytes);
637 req->gpn_ft.fn_fc4_type = FC_TYPE_FCP;
639 ct_els->handler = zfcp_fc_complete;
640 ct_els->handler_data = &completion;
641 ct_els->req = &fc_req->sg_req;
642 ct_els->resp = &fc_req->sg_rsp;
644 ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL,
647 wait_for_completion(&completion);
651 static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh)
653 if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC))
656 atomic_andnot(ZFCP_STATUS_COMMON_NOESC, &port->status);
658 if ((port->supported_classes != 0) ||
659 !list_empty(&port->unit_list))
662 list_move_tail(&port->list, lh);
665 static int zfcp_fc_eval_gpn_ft(struct zfcp_fc_req *fc_req,
666 struct zfcp_adapter *adapter, int max_entries)
668 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
669 struct scatterlist *sg = &fc_req->sg_rsp;
670 struct fc_ct_hdr *hdr = sg_virt(sg);
671 struct fc_gpn_ft_resp *acc = sg_virt(sg);
672 struct zfcp_port *port, *tmp;
674 LIST_HEAD(remove_lh);
676 int ret = 0, x, last = 0;
681 if (hdr->ct_cmd != FC_FS_ACC) {
682 if (hdr->ct_reason == FC_BA_RJT_UNABLE)
683 return -EAGAIN; /* might be a temporary condition */
687 if (hdr->ct_mr_size) {
688 dev_warn(&adapter->ccw_device->dev,
689 "The name server reported %d words residual data\n",
694 /* first entry is the header */
695 for (x = 1; x < max_entries && !last; x++) {
696 if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1))
701 last = acc->fp_flags & FC_NS_FID_LAST;
702 d_id = ntoh24(acc->fp_fid);
704 /* don't attach ports with a well known address */
705 if (d_id >= FC_FID_WELL_KNOWN_BASE)
707 /* skip the adapter's port and known remote ports */
708 if (acc->fp_wwpn == fc_host_port_name(adapter->scsi_host))
711 port = zfcp_port_enqueue(adapter, acc->fp_wwpn,
712 ZFCP_STATUS_COMMON_NOESC, d_id);
714 zfcp_erp_port_reopen(port, 0, "fcegpf1");
715 else if (PTR_ERR(port) != -EEXIST)
719 zfcp_erp_wait(adapter);
720 write_lock_irqsave(&adapter->port_list_lock, flags);
721 list_for_each_entry_safe(port, tmp, &adapter->port_list, list)
722 zfcp_fc_validate_port(port, &remove_lh);
723 write_unlock_irqrestore(&adapter->port_list_lock, flags);
725 list_for_each_entry_safe(port, tmp, &remove_lh, list) {
726 zfcp_erp_port_shutdown(port, 0, "fcegpf2");
727 device_unregister(&port->dev);
734 * zfcp_fc_scan_ports - scan remote ports and attach new ports
735 * @work: reference to scheduled work
737 void zfcp_fc_scan_ports(struct work_struct *work)
739 struct delayed_work *dw = to_delayed_work(work);
740 struct zfcp_adapter *adapter = container_of(dw, struct zfcp_adapter,
743 struct zfcp_fc_req *fc_req;
744 int chain, max_entries, buf_num, max_bytes;
746 zfcp_fc_port_scan_time(adapter);
748 chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS;
749 buf_num = chain ? ZFCP_FC_GPN_FT_NUM_BUFS : 1;
750 max_entries = chain ? ZFCP_FC_GPN_FT_MAX_ENT : ZFCP_FC_GPN_FT_ENT_PAGE;
751 max_bytes = chain ? ZFCP_FC_GPN_FT_MAX_SIZE : ZFCP_FC_CT_SIZE_PAGE;
753 if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT &&
754 fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
757 if (zfcp_fc_wka_port_get(&adapter->gs->ds))
760 fc_req = zfcp_alloc_sg_env(buf_num);
764 for (i = 0; i < 3; i++) {
765 ret = zfcp_fc_send_gpn_ft(fc_req, adapter, max_bytes);
767 ret = zfcp_fc_eval_gpn_ft(fc_req, adapter, max_entries);
774 zfcp_sg_free_table(&fc_req->sg_rsp, buf_num);
775 kmem_cache_free(zfcp_fc_req_cache, fc_req);
777 zfcp_fc_wka_port_put(&adapter->gs->ds);
780 static int zfcp_fc_gspn(struct zfcp_adapter *adapter,
781 struct zfcp_fc_req *fc_req)
783 DECLARE_COMPLETION_ONSTACK(completion);
784 char devno[] = "DEVNO:";
785 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
786 struct zfcp_fc_gspn_req *gspn_req = &fc_req->u.gspn.req;
787 struct zfcp_fc_gspn_rsp *gspn_rsp = &fc_req->u.gspn.rsp;
790 zfcp_fc_ct_ns_init(&gspn_req->ct_hdr, FC_NS_GSPN_ID,
791 FC_SYMBOLIC_NAME_SIZE);
792 hton24(gspn_req->gspn.fp_fid, fc_host_port_id(adapter->scsi_host));
794 sg_init_one(&fc_req->sg_req, gspn_req, sizeof(*gspn_req));
795 sg_init_one(&fc_req->sg_rsp, gspn_rsp, sizeof(*gspn_rsp));
797 ct_els->handler = zfcp_fc_complete;
798 ct_els->handler_data = &completion;
799 ct_els->req = &fc_req->sg_req;
800 ct_els->resp = &fc_req->sg_rsp;
802 ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL,
807 wait_for_completion(&completion);
809 return ct_els->status;
811 if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_NPIV &&
812 !(strstr(gspn_rsp->gspn.fp_name, devno)))
813 snprintf(fc_host_symbolic_name(adapter->scsi_host),
814 FC_SYMBOLIC_NAME_SIZE, "%s%s %s NAME: %s",
815 gspn_rsp->gspn.fp_name, devno,
816 dev_name(&adapter->ccw_device->dev),
817 init_utsname()->nodename);
819 strlcpy(fc_host_symbolic_name(adapter->scsi_host),
820 gspn_rsp->gspn.fp_name, FC_SYMBOLIC_NAME_SIZE);
825 static void zfcp_fc_rspn(struct zfcp_adapter *adapter,
826 struct zfcp_fc_req *fc_req)
828 DECLARE_COMPLETION_ONSTACK(completion);
829 struct Scsi_Host *shost = adapter->scsi_host;
830 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
831 struct zfcp_fc_rspn_req *rspn_req = &fc_req->u.rspn.req;
832 struct fc_ct_hdr *rspn_rsp = &fc_req->u.rspn.rsp;
835 zfcp_fc_ct_ns_init(&rspn_req->ct_hdr, FC_NS_RSPN_ID,
836 FC_SYMBOLIC_NAME_SIZE);
837 hton24(rspn_req->rspn.fr_fid.fp_fid, fc_host_port_id(shost));
838 len = strlcpy(rspn_req->rspn.fr_name, fc_host_symbolic_name(shost),
839 FC_SYMBOLIC_NAME_SIZE);
840 rspn_req->rspn.fr_name_len = len;
842 sg_init_one(&fc_req->sg_req, rspn_req, sizeof(*rspn_req));
843 sg_init_one(&fc_req->sg_rsp, rspn_rsp, sizeof(*rspn_rsp));
845 ct_els->handler = zfcp_fc_complete;
846 ct_els->handler_data = &completion;
847 ct_els->req = &fc_req->sg_req;
848 ct_els->resp = &fc_req->sg_rsp;
850 ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL,
853 wait_for_completion(&completion);
857 * zfcp_fc_sym_name_update - Retrieve and update the symbolic port name
858 * @work: ns_up_work of the adapter where to update the symbolic port name
860 * Retrieve the current symbolic port name that may have been set by
861 * the hardware using the GSPN request and update the fc_host
862 * symbolic_name sysfs attribute. When running in NPIV mode (and hence
863 * the port name is unique for this system), update the symbolic port
864 * name to add Linux specific information and update the FC nameserver
865 * using the RSPN request.
867 void zfcp_fc_sym_name_update(struct work_struct *work)
869 struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter,
872 struct zfcp_fc_req *fc_req;
874 if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT &&
875 fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
878 fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL);
882 ret = zfcp_fc_wka_port_get(&adapter->gs->ds);
886 ret = zfcp_fc_gspn(adapter, fc_req);
887 if (ret || fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
890 memset(fc_req, 0, sizeof(*fc_req));
891 zfcp_fc_rspn(adapter, fc_req);
894 zfcp_fc_wka_port_put(&adapter->gs->ds);
896 kmem_cache_free(zfcp_fc_req_cache, fc_req);
899 static void zfcp_fc_ct_els_job_handler(void *data)
901 struct fc_bsg_job *job = data;
902 struct zfcp_fsf_ct_els *zfcp_ct_els = job->dd_data;
903 struct fc_bsg_reply *jr = job->reply;
905 jr->reply_payload_rcv_len = job->reply_payload.payload_len;
906 jr->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK;
907 jr->result = zfcp_ct_els->status ? -EIO : 0;
911 static struct zfcp_fc_wka_port *zfcp_fc_job_wka_port(struct fc_bsg_job *job)
915 struct zfcp_adapter *adapter;
917 preamble_word1 = job->request->rqst_data.r_ct.preamble_word1;
918 gs_type = (preamble_word1 & 0xff000000) >> 24;
920 adapter = (struct zfcp_adapter *) job->shost->hostdata[0];
924 return &adapter->gs->as;
926 return &adapter->gs->ms;
928 return &adapter->gs->ts;
931 return &adapter->gs->ds;
938 static void zfcp_fc_ct_job_handler(void *data)
940 struct fc_bsg_job *job = data;
941 struct zfcp_fc_wka_port *wka_port;
943 wka_port = zfcp_fc_job_wka_port(job);
944 zfcp_fc_wka_port_put(wka_port);
946 zfcp_fc_ct_els_job_handler(data);
949 static int zfcp_fc_exec_els_job(struct fc_bsg_job *job,
950 struct zfcp_adapter *adapter)
952 struct zfcp_fsf_ct_els *els = job->dd_data;
953 struct fc_rport *rport = job->rport;
954 struct zfcp_port *port;
958 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
963 put_device(&port->dev);
965 d_id = ntoh24(job->request->rqst_data.h_els.port_id);
967 els->handler = zfcp_fc_ct_els_job_handler;
968 return zfcp_fsf_send_els(adapter, d_id, els, job->req->timeout / HZ);
971 static int zfcp_fc_exec_ct_job(struct fc_bsg_job *job,
972 struct zfcp_adapter *adapter)
975 struct zfcp_fsf_ct_els *ct = job->dd_data;
976 struct zfcp_fc_wka_port *wka_port;
978 wka_port = zfcp_fc_job_wka_port(job);
982 ret = zfcp_fc_wka_port_get(wka_port);
986 ct->handler = zfcp_fc_ct_job_handler;
987 ret = zfcp_fsf_send_ct(wka_port, ct, NULL, job->req->timeout / HZ);
989 zfcp_fc_wka_port_put(wka_port);
994 int zfcp_fc_exec_bsg_job(struct fc_bsg_job *job)
996 struct Scsi_Host *shost;
997 struct zfcp_adapter *adapter;
998 struct zfcp_fsf_ct_els *ct_els = job->dd_data;
1000 shost = job->rport ? rport_to_shost(job->rport) : job->shost;
1001 adapter = (struct zfcp_adapter *)shost->hostdata[0];
1003 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN))
1006 ct_els->req = job->request_payload.sg_list;
1007 ct_els->resp = job->reply_payload.sg_list;
1008 ct_els->handler_data = job;
1010 switch (job->request->msgcode) {
1011 case FC_BSG_RPT_ELS:
1012 case FC_BSG_HST_ELS_NOLOGIN:
1013 return zfcp_fc_exec_els_job(job, adapter);
1016 return zfcp_fc_exec_ct_job(job, adapter);
1022 int zfcp_fc_timeout_bsg_job(struct fc_bsg_job *job)
1024 /* hardware tracks timeout, reset bsg timeout to not interfere */
1028 int zfcp_fc_gs_setup(struct zfcp_adapter *adapter)
1030 struct zfcp_fc_wka_ports *wka_ports;
1032 wka_ports = kzalloc(sizeof(struct zfcp_fc_wka_ports), GFP_KERNEL);
1036 adapter->gs = wka_ports;
1037 zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter);
1038 zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter);
1039 zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter);
1040 zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter);
1045 void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter)