Commit | Line | Data |
---|---|---|
24073b47 CS |
1 | /* |
2 | * zfcp device driver | |
3 | * | |
4 | * Fibre Channel related functions for the zfcp device driver. | |
5 | * | |
a2fa0aed | 6 | * Copyright IBM Corporation 2008, 2009 |
24073b47 CS |
7 | */ |
8 | ||
ecf39d42 CS |
9 | #define KMSG_COMPONENT "zfcp" |
10 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
11 | ||
24073b47 CS |
12 | #include "zfcp_ext.h" |
13 | ||
e0d7fcb5 CS |
14 | enum rscn_address_format { |
15 | RSCN_PORT_ADDRESS = 0x0, | |
16 | RSCN_AREA_ADDRESS = 0x1, | |
17 | RSCN_DOMAIN_ADDRESS = 0x2, | |
18 | RSCN_FABRIC_ADDRESS = 0x3, | |
19 | }; | |
20 | ||
21 | static u32 rscn_range_mask[] = { | |
22 | [RSCN_PORT_ADDRESS] = 0xFFFFFF, | |
23 | [RSCN_AREA_ADDRESS] = 0xFFFF00, | |
24 | [RSCN_DOMAIN_ADDRESS] = 0xFF0000, | |
25 | [RSCN_FABRIC_ADDRESS] = 0x000000, | |
26 | }; | |
27 | ||
cc8c2829 SS |
28 | struct ct_iu_gpn_ft_req { |
29 | struct ct_hdr header; | |
30 | u8 flags; | |
31 | u8 domain_id_scope; | |
32 | u8 area_id_scope; | |
33 | u8 fc4_type; | |
34 | } __attribute__ ((packed)); | |
35 | ||
36 | struct gpn_ft_resp_acc { | |
37 | u8 control; | |
38 | u8 port_id[3]; | |
39 | u8 reserved[4]; | |
40 | u64 wwpn; | |
41 | } __attribute__ ((packed)); | |
42 | ||
39eb7e9a CS |
43 | #define ZFCP_CT_SIZE_ONE_PAGE (PAGE_SIZE - sizeof(struct ct_hdr)) |
44 | #define ZFCP_GPN_FT_ENTRIES (ZFCP_CT_SIZE_ONE_PAGE \ | |
45 | / sizeof(struct gpn_ft_resp_acc)) | |
cc8c2829 | 46 | #define ZFCP_GPN_FT_BUFFERS 4 |
39eb7e9a CS |
47 | #define ZFCP_GPN_FT_MAX_SIZE (ZFCP_GPN_FT_BUFFERS * PAGE_SIZE \ |
48 | - sizeof(struct ct_hdr)) | |
cc8c2829 SS |
49 | #define ZFCP_GPN_FT_MAX_ENTRIES ZFCP_GPN_FT_BUFFERS * (ZFCP_GPN_FT_ENTRIES + 1) |
50 | ||
51 | struct ct_iu_gpn_ft_resp { | |
52 | struct ct_hdr header; | |
53 | struct gpn_ft_resp_acc accept[ZFCP_GPN_FT_ENTRIES]; | |
54 | } __attribute__ ((packed)); | |
55 | ||
56 | struct zfcp_gpn_ft { | |
57 | struct zfcp_send_ct ct; | |
58 | struct scatterlist sg_req; | |
59 | struct scatterlist sg_resp[ZFCP_GPN_FT_BUFFERS]; | |
60 | }; | |
61 | ||
5ab944f9 SS |
62 | struct zfcp_fc_ns_handler_data { |
63 | struct completion done; | |
64 | void (*handler)(unsigned long); | |
65 | unsigned long handler_data; | |
66 | }; | |
67 | ||
68 | static int zfcp_wka_port_get(struct zfcp_wka_port *wka_port) | |
69 | { | |
70 | if (mutex_lock_interruptible(&wka_port->mutex)) | |
71 | return -ERESTARTSYS; | |
72 | ||
1c1cba17 CS |
73 | if (wka_port->status == ZFCP_WKA_PORT_OFFLINE || |
74 | wka_port->status == ZFCP_WKA_PORT_CLOSING) { | |
5ab944f9 SS |
75 | wka_port->status = ZFCP_WKA_PORT_OPENING; |
76 | if (zfcp_fsf_open_wka_port(wka_port)) | |
77 | wka_port->status = ZFCP_WKA_PORT_OFFLINE; | |
78 | } | |
79 | ||
80 | mutex_unlock(&wka_port->mutex); | |
81 | ||
27f492cc SS |
82 | wait_event(wka_port->completion_wq, |
83 | wka_port->status == ZFCP_WKA_PORT_ONLINE || | |
84 | wka_port->status == ZFCP_WKA_PORT_OFFLINE); | |
5ab944f9 SS |
85 | |
86 | if (wka_port->status == ZFCP_WKA_PORT_ONLINE) { | |
87 | atomic_inc(&wka_port->refcount); | |
88 | return 0; | |
89 | } | |
90 | return -EIO; | |
91 | } | |
92 | ||
93 | static void zfcp_wka_port_offline(struct work_struct *work) | |
94 | { | |
bf6aede7 | 95 | struct delayed_work *dw = to_delayed_work(work); |
5ab944f9 SS |
96 | struct zfcp_wka_port *wka_port = |
97 | container_of(dw, struct zfcp_wka_port, work); | |
98 | ||
5ab944f9 SS |
99 | mutex_lock(&wka_port->mutex); |
100 | if ((atomic_read(&wka_port->refcount) != 0) || | |
101 | (wka_port->status != ZFCP_WKA_PORT_ONLINE)) | |
102 | goto out; | |
103 | ||
104 | wka_port->status = ZFCP_WKA_PORT_CLOSING; | |
105 | if (zfcp_fsf_close_wka_port(wka_port)) { | |
106 | wka_port->status = ZFCP_WKA_PORT_OFFLINE; | |
107 | wake_up(&wka_port->completion_wq); | |
108 | } | |
109 | out: | |
110 | mutex_unlock(&wka_port->mutex); | |
111 | } | |
112 | ||
113 | static void zfcp_wka_port_put(struct zfcp_wka_port *wka_port) | |
114 | { | |
115 | if (atomic_dec_return(&wka_port->refcount) != 0) | |
116 | return; | |
19af5cdb | 117 | /* wait 10 milliseconds, other reqs might pop in */ |
5ab944f9 SS |
118 | schedule_delayed_work(&wka_port->work, HZ / 100); |
119 | } | |
120 | ||
9d544f2b SS |
121 | static void zfcp_fc_wka_port_init(struct zfcp_wka_port *wka_port, u32 d_id, |
122 | struct zfcp_adapter *adapter) | |
5ab944f9 | 123 | { |
5ab944f9 SS |
124 | init_waitqueue_head(&wka_port->completion_wq); |
125 | ||
126 | wka_port->adapter = adapter; | |
9d544f2b | 127 | wka_port->d_id = d_id; |
5ab944f9 SS |
128 | |
129 | wka_port->status = ZFCP_WKA_PORT_OFFLINE; | |
130 | atomic_set(&wka_port->refcount, 0); | |
131 | mutex_init(&wka_port->mutex); | |
132 | INIT_DELAYED_WORK(&wka_port->work, zfcp_wka_port_offline); | |
133 | } | |
134 | ||
55c770fa | 135 | static void zfcp_fc_wka_port_force_offline(struct zfcp_wka_port *wka) |
828bc121 SS |
136 | { |
137 | cancel_delayed_work_sync(&wka->work); | |
138 | mutex_lock(&wka->mutex); | |
139 | wka->status = ZFCP_WKA_PORT_OFFLINE; | |
140 | mutex_unlock(&wka->mutex); | |
141 | } | |
142 | ||
55c770fa CS |
143 | void zfcp_fc_wka_ports_force_offline(struct zfcp_wka_ports *gs) |
144 | { | |
145 | zfcp_fc_wka_port_force_offline(&gs->ms); | |
146 | zfcp_fc_wka_port_force_offline(&gs->ts); | |
147 | zfcp_fc_wka_port_force_offline(&gs->ds); | |
148 | zfcp_fc_wka_port_force_offline(&gs->as); | |
149 | zfcp_fc_wka_port_force_offline(&gs->ks); | |
150 | } | |
151 | ||
9d544f2b SS |
152 | void zfcp_fc_wka_ports_init(struct zfcp_adapter *adapter) |
153 | { | |
154 | struct zfcp_wka_ports *gs = adapter->gs; | |
155 | ||
156 | zfcp_fc_wka_port_init(&gs->ms, FC_FID_MGMT_SERV, adapter); | |
157 | zfcp_fc_wka_port_init(&gs->ts, FC_FID_TIME_SERV, adapter); | |
158 | zfcp_fc_wka_port_init(&gs->ds, FC_FID_DIR_SERV, adapter); | |
159 | zfcp_fc_wka_port_init(&gs->as, FC_FID_ALIASES, adapter); | |
160 | zfcp_fc_wka_port_init(&gs->ks, FC_FID_SEC_KEY, adapter); | |
161 | } | |
162 | ||
24073b47 CS |
163 | static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, |
164 | struct fcp_rscn_element *elem) | |
165 | { | |
166 | unsigned long flags; | |
167 | struct zfcp_port *port; | |
168 | ||
169 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
ea460a81 | 170 | list_for_each_entry(port, &fsf_req->adapter->port_list_head, list) { |
24095490 | 171 | if ((port->d_id & range) == (elem->nport_did & range)) |
24073b47 | 172 | zfcp_test_link(port); |
ea460a81 SS |
173 | if (!port->d_id) |
174 | zfcp_erp_port_reopen(port, | |
175 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
176 | "fcrscn1", NULL); | |
177 | } | |
24095490 | 178 | |
24073b47 CS |
179 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
180 | } | |
181 | ||
182 | static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) | |
183 | { | |
184 | struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data; | |
185 | struct fcp_rscn_head *fcp_rscn_head; | |
186 | struct fcp_rscn_element *fcp_rscn_element; | |
187 | u16 i; | |
188 | u16 no_entries; | |
189 | u32 range_mask; | |
190 | ||
c41f8cbd SS |
191 | fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload.data; |
192 | fcp_rscn_element = (struct fcp_rscn_element *) fcp_rscn_head; | |
24073b47 CS |
193 | |
194 | /* see FC-FS */ | |
195 | no_entries = fcp_rscn_head->payload_len / | |
196 | sizeof(struct fcp_rscn_element); | |
197 | ||
198 | for (i = 1; i < no_entries; i++) { | |
199 | /* skip head and start with 1st element */ | |
200 | fcp_rscn_element++; | |
e0d7fcb5 | 201 | range_mask = rscn_range_mask[fcp_rscn_element->addr_format]; |
24073b47 CS |
202 | _zfcp_fc_incoming_rscn(fsf_req, range_mask, fcp_rscn_element); |
203 | } | |
cc8c2829 | 204 | schedule_work(&fsf_req->adapter->scan_work); |
24073b47 CS |
205 | } |
206 | ||
7ba58c9c | 207 | static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn) |
24073b47 CS |
208 | { |
209 | struct zfcp_adapter *adapter = req->adapter; | |
210 | struct zfcp_port *port; | |
211 | unsigned long flags; | |
212 | ||
213 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
214 | list_for_each_entry(port, &adapter->port_list_head, list) | |
215 | if (port->wwpn == wwpn) | |
216 | break; | |
217 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
218 | ||
219 | if (port && (port->wwpn == wwpn)) | |
5ffd51a5 | 220 | zfcp_erp_port_forced_reopen(port, 0, "fciwwp1", req); |
24073b47 CS |
221 | } |
222 | ||
223 | static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req) | |
224 | { | |
225 | struct fsf_status_read_buffer *status_buffer = | |
226 | (struct fsf_status_read_buffer *)req->data; | |
227 | struct fsf_plogi *els_plogi = | |
c41f8cbd | 228 | (struct fsf_plogi *) status_buffer->payload.data; |
24073b47 CS |
229 | |
230 | zfcp_fc_incoming_wwpn(req, els_plogi->serv_param.wwpn); | |
231 | } | |
232 | ||
233 | static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req) | |
234 | { | |
235 | struct fsf_status_read_buffer *status_buffer = | |
236 | (struct fsf_status_read_buffer *)req->data; | |
c41f8cbd SS |
237 | struct fcp_logo *els_logo = |
238 | (struct fcp_logo *) status_buffer->payload.data; | |
24073b47 CS |
239 | |
240 | zfcp_fc_incoming_wwpn(req, els_logo->nport_wwpn); | |
241 | } | |
242 | ||
243 | /** | |
244 | * zfcp_fc_incoming_els - handle incoming ELS | |
245 | * @fsf_req - request which contains incoming ELS | |
246 | */ | |
247 | void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req) | |
248 | { | |
249 | struct fsf_status_read_buffer *status_buffer = | |
250 | (struct fsf_status_read_buffer *) fsf_req->data; | |
c41f8cbd | 251 | unsigned int els_type = status_buffer->payload.data[0]; |
24073b47 CS |
252 | |
253 | zfcp_san_dbf_event_incoming_els(fsf_req); | |
254 | if (els_type == LS_PLOGI) | |
255 | zfcp_fc_incoming_plogi(fsf_req); | |
256 | else if (els_type == LS_LOGO) | |
257 | zfcp_fc_incoming_logo(fsf_req); | |
258 | else if (els_type == LS_RSCN) | |
259 | zfcp_fc_incoming_rscn(fsf_req); | |
260 | } | |
261 | ||
5ab944f9 SS |
262 | static void zfcp_fc_ns_handler(unsigned long data) |
263 | { | |
264 | struct zfcp_fc_ns_handler_data *compl_rec = | |
265 | (struct zfcp_fc_ns_handler_data *) data; | |
266 | ||
267 | if (compl_rec->handler) | |
268 | compl_rec->handler(compl_rec->handler_data); | |
269 | ||
270 | complete(&compl_rec->done); | |
271 | } | |
272 | ||
273 | static void zfcp_fc_ns_gid_pn_eval(unsigned long data) | |
24073b47 CS |
274 | { |
275 | struct zfcp_gid_pn_data *gid_pn = (struct zfcp_gid_pn_data *) data; | |
276 | struct zfcp_send_ct *ct = &gid_pn->ct; | |
277 | struct ct_iu_gid_pn_req *ct_iu_req = sg_virt(ct->req); | |
278 | struct ct_iu_gid_pn_resp *ct_iu_resp = sg_virt(ct->resp); | |
279 | struct zfcp_port *port = gid_pn->port; | |
280 | ||
281 | if (ct->status) | |
5ab944f9 | 282 | return; |
a5b11dda | 283 | if (ct_iu_resp->header.cmd_rsp_code != ZFCP_CT_ACCEPT) |
5ab944f9 | 284 | return; |
a5b11dda | 285 | |
24073b47 CS |
286 | /* paranoia */ |
287 | if (ct_iu_req->wwpn != port->wwpn) | |
5ab944f9 | 288 | return; |
24073b47 CS |
289 | /* looks like a valid d_id */ |
290 | port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK; | |
24073b47 CS |
291 | } |
292 | ||
5ab944f9 SS |
293 | int static zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *erp_action, |
294 | struct zfcp_gid_pn_data *gid_pn) | |
24073b47 | 295 | { |
24073b47 | 296 | struct zfcp_adapter *adapter = erp_action->adapter; |
5ab944f9 SS |
297 | struct zfcp_fc_ns_handler_data compl_rec; |
298 | int ret; | |
24073b47 CS |
299 | |
300 | /* setup parameters for send generic command */ | |
301 | gid_pn->port = erp_action->port; | |
9d544f2b | 302 | gid_pn->ct.wka_port = &adapter->gs->ds; |
5ab944f9 SS |
303 | gid_pn->ct.handler = zfcp_fc_ns_handler; |
304 | gid_pn->ct.handler_data = (unsigned long) &compl_rec; | |
24073b47 CS |
305 | gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT; |
306 | gid_pn->ct.req = &gid_pn->req; | |
307 | gid_pn->ct.resp = &gid_pn->resp; | |
24073b47 CS |
308 | sg_init_one(&gid_pn->req, &gid_pn->ct_iu_req, |
309 | sizeof(struct ct_iu_gid_pn_req)); | |
310 | sg_init_one(&gid_pn->resp, &gid_pn->ct_iu_resp, | |
311 | sizeof(struct ct_iu_gid_pn_resp)); | |
312 | ||
313 | /* setup nameserver request */ | |
314 | gid_pn->ct_iu_req.header.revision = ZFCP_CT_REVISION; | |
315 | gid_pn->ct_iu_req.header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; | |
316 | gid_pn->ct_iu_req.header.gs_subtype = ZFCP_CT_NAME_SERVER; | |
317 | gid_pn->ct_iu_req.header.options = ZFCP_CT_SYNCHRONOUS; | |
318 | gid_pn->ct_iu_req.header.cmd_rsp_code = ZFCP_CT_GID_PN; | |
39eb7e9a | 319 | gid_pn->ct_iu_req.header.max_res_size = ZFCP_CT_SIZE_ONE_PAGE / 4; |
24073b47 CS |
320 | gid_pn->ct_iu_req.wwpn = erp_action->port->wwpn; |
321 | ||
5ab944f9 SS |
322 | init_completion(&compl_rec.done); |
323 | compl_rec.handler = zfcp_fc_ns_gid_pn_eval; | |
324 | compl_rec.handler_data = (unsigned long) gid_pn; | |
24073b47 CS |
325 | ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp, |
326 | erp_action); | |
5ab944f9 SS |
327 | if (!ret) |
328 | wait_for_completion(&compl_rec.done); | |
329 | return ret; | |
330 | } | |
331 | ||
332 | /** | |
333 | * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request | |
334 | * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed | |
335 | * return: -ENOMEM on error, 0 otherwise | |
336 | */ | |
337 | int zfcp_fc_ns_gid_pn(struct zfcp_erp_action *erp_action) | |
338 | { | |
339 | int ret; | |
340 | struct zfcp_gid_pn_data *gid_pn; | |
341 | struct zfcp_adapter *adapter = erp_action->adapter; | |
342 | ||
343 | gid_pn = mempool_alloc(adapter->pool.data_gid_pn, GFP_ATOMIC); | |
344 | if (!gid_pn) | |
345 | return -ENOMEM; | |
346 | ||
347 | memset(gid_pn, 0, sizeof(*gid_pn)); | |
348 | ||
9d544f2b | 349 | ret = zfcp_wka_port_get(&adapter->gs->ds); |
24073b47 | 350 | if (ret) |
5ab944f9 SS |
351 | goto out; |
352 | ||
353 | ret = zfcp_fc_ns_gid_pn_request(erp_action, gid_pn); | |
354 | ||
9d544f2b | 355 | zfcp_wka_port_put(&adapter->gs->ds); |
5ab944f9 SS |
356 | out: |
357 | mempool_free(gid_pn, adapter->pool.data_gid_pn); | |
24073b47 CS |
358 | return ret; |
359 | } | |
360 | ||
361 | /** | |
362 | * zfcp_fc_plogi_evaluate - evaluate PLOGI playload | |
363 | * @port: zfcp_port structure | |
364 | * @plogi: plogi payload | |
365 | * | |
366 | * Evaluate PLOGI playload and copy important fields into zfcp_port structure | |
367 | */ | |
368 | void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi) | |
369 | { | |
370 | port->maxframe_size = plogi->serv_param.common_serv_param[7] | | |
371 | ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8); | |
372 | if (plogi->serv_param.class1_serv_param[0] & 0x80) | |
373 | port->supported_classes |= FC_COS_CLASS1; | |
374 | if (plogi->serv_param.class2_serv_param[0] & 0x80) | |
375 | port->supported_classes |= FC_COS_CLASS2; | |
376 | if (plogi->serv_param.class3_serv_param[0] & 0x80) | |
377 | port->supported_classes |= FC_COS_CLASS3; | |
378 | if (plogi->serv_param.class4_serv_param[0] & 0x80) | |
379 | port->supported_classes |= FC_COS_CLASS4; | |
380 | } | |
381 | ||
382 | struct zfcp_els_adisc { | |
383 | struct zfcp_send_els els; | |
384 | struct scatterlist req; | |
385 | struct scatterlist resp; | |
386 | struct zfcp_ls_adisc ls_adisc; | |
44cc76f2 | 387 | struct zfcp_ls_adisc ls_adisc_acc; |
24073b47 CS |
388 | }; |
389 | ||
390 | static void zfcp_fc_adisc_handler(unsigned long data) | |
391 | { | |
392 | struct zfcp_els_adisc *adisc = (struct zfcp_els_adisc *) data; | |
393 | struct zfcp_port *port = adisc->els.port; | |
44cc76f2 | 394 | struct zfcp_ls_adisc *ls_adisc = &adisc->ls_adisc_acc; |
24073b47 | 395 | |
3968ce80 | 396 | if (adisc->els.status) { |
24073b47 | 397 | /* request rejected or timed out */ |
5b43e719 SS |
398 | zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, |
399 | "fcadh_1", NULL); | |
24073b47 CS |
400 | goto out; |
401 | } | |
402 | ||
403 | if (!port->wwnn) | |
404 | port->wwnn = ls_adisc->wwnn; | |
405 | ||
24095490 | 406 | if ((port->wwpn != ls_adisc->wwpn) || |
a2fa0aed | 407 | !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) { |
24095490 SS |
408 | zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, |
409 | "fcadh_2", NULL); | |
a2fa0aed CS |
410 | goto out; |
411 | } | |
24073b47 | 412 | |
a2fa0aed CS |
413 | /* port is good, unblock rport without going through erp */ |
414 | zfcp_scsi_schedule_rport_register(port); | |
24073b47 | 415 | out: |
14e242ea | 416 | atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); |
24073b47 CS |
417 | zfcp_port_put(port); |
418 | kfree(adisc); | |
419 | } | |
420 | ||
421 | static int zfcp_fc_adisc(struct zfcp_port *port) | |
422 | { | |
423 | struct zfcp_els_adisc *adisc; | |
424 | struct zfcp_adapter *adapter = port->adapter; | |
425 | ||
426 | adisc = kzalloc(sizeof(struct zfcp_els_adisc), GFP_ATOMIC); | |
427 | if (!adisc) | |
428 | return -ENOMEM; | |
429 | ||
430 | adisc->els.req = &adisc->req; | |
431 | adisc->els.resp = &adisc->resp; | |
432 | sg_init_one(adisc->els.req, &adisc->ls_adisc, | |
433 | sizeof(struct zfcp_ls_adisc)); | |
434 | sg_init_one(adisc->els.resp, &adisc->ls_adisc_acc, | |
44cc76f2 | 435 | sizeof(struct zfcp_ls_adisc)); |
24073b47 | 436 | |
24073b47 CS |
437 | adisc->els.adapter = adapter; |
438 | adisc->els.port = port; | |
439 | adisc->els.d_id = port->d_id; | |
440 | adisc->els.handler = zfcp_fc_adisc_handler; | |
441 | adisc->els.handler_data = (unsigned long) adisc; | |
442 | adisc->els.ls_code = adisc->ls_adisc.code = ZFCP_LS_ADISC; | |
443 | ||
444 | /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports | |
445 | without FC-AL-2 capability, so we don't set it */ | |
446 | adisc->ls_adisc.wwpn = fc_host_port_name(adapter->scsi_host); | |
447 | adisc->ls_adisc.wwnn = fc_host_node_name(adapter->scsi_host); | |
448 | adisc->ls_adisc.nport_id = fc_host_port_id(adapter->scsi_host); | |
449 | ||
450 | return zfcp_fsf_send_els(&adisc->els); | |
451 | } | |
452 | ||
8fdf30d5 | 453 | void zfcp_fc_link_test_work(struct work_struct *work) |
24073b47 | 454 | { |
8fdf30d5 CS |
455 | struct zfcp_port *port = |
456 | container_of(work, struct zfcp_port, test_link_work); | |
24073b47 CS |
457 | int retval; |
458 | ||
a2fa0aed CS |
459 | zfcp_port_get(port); |
460 | port->rport_task = RPORT_DEL; | |
461 | zfcp_scsi_rport_work(&port->rport_work); | |
462 | ||
14e242ea CS |
463 | /* only issue one test command at one time per port */ |
464 | if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST) | |
465 | goto out; | |
466 | ||
467 | atomic_set_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); | |
468 | ||
24073b47 | 469 | retval = zfcp_fc_adisc(port); |
9528539c | 470 | if (retval == 0) |
24073b47 CS |
471 | return; |
472 | ||
473 | /* send of ADISC was not possible */ | |
14e242ea | 474 | atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); |
a2fa0aed CS |
475 | zfcp_erp_port_forced_reopen(port, 0, "fcltwk1", NULL); |
476 | ||
14e242ea | 477 | out: |
24073b47 | 478 | zfcp_port_put(port); |
24073b47 | 479 | } |
cc8c2829 | 480 | |
8fdf30d5 CS |
481 | /** |
482 | * zfcp_test_link - lightweight link test procedure | |
483 | * @port: port to be tested | |
484 | * | |
485 | * Test status of a link to a remote port using the ELS command ADISC. | |
486 | * If there is a problem with the remote port, error recovery steps | |
487 | * will be triggered. | |
488 | */ | |
489 | void zfcp_test_link(struct zfcp_port *port) | |
490 | { | |
491 | zfcp_port_get(port); | |
492 | if (!queue_work(zfcp_data.work_queue, &port->test_link_work)) | |
493 | zfcp_port_put(port); | |
494 | } | |
495 | ||
39eb7e9a | 496 | static void zfcp_free_sg_env(struct zfcp_gpn_ft *gpn_ft, int buf_num) |
cc8c2829 SS |
497 | { |
498 | struct scatterlist *sg = &gpn_ft->sg_req; | |
499 | ||
500 | kfree(sg_virt(sg)); /* free request buffer */ | |
39eb7e9a | 501 | zfcp_sg_free_table(gpn_ft->sg_resp, buf_num); |
cc8c2829 SS |
502 | |
503 | kfree(gpn_ft); | |
504 | } | |
505 | ||
39eb7e9a | 506 | static struct zfcp_gpn_ft *zfcp_alloc_sg_env(int buf_num) |
cc8c2829 SS |
507 | { |
508 | struct zfcp_gpn_ft *gpn_ft; | |
509 | struct ct_iu_gpn_ft_req *req; | |
510 | ||
511 | gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL); | |
512 | if (!gpn_ft) | |
513 | return NULL; | |
514 | ||
515 | req = kzalloc(sizeof(struct ct_iu_gpn_ft_req), GFP_KERNEL); | |
516 | if (!req) { | |
517 | kfree(gpn_ft); | |
518 | gpn_ft = NULL; | |
519 | goto out; | |
520 | } | |
521 | sg_init_one(&gpn_ft->sg_req, req, sizeof(*req)); | |
522 | ||
39eb7e9a CS |
523 | if (zfcp_sg_setup_table(gpn_ft->sg_resp, buf_num)) { |
524 | zfcp_free_sg_env(gpn_ft, buf_num); | |
cc8c2829 SS |
525 | gpn_ft = NULL; |
526 | } | |
527 | out: | |
528 | return gpn_ft; | |
529 | } | |
530 | ||
531 | ||
532 | static int zfcp_scan_issue_gpn_ft(struct zfcp_gpn_ft *gpn_ft, | |
39eb7e9a CS |
533 | struct zfcp_adapter *adapter, |
534 | int max_bytes) | |
cc8c2829 SS |
535 | { |
536 | struct zfcp_send_ct *ct = &gpn_ft->ct; | |
537 | struct ct_iu_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req); | |
5ab944f9 | 538 | struct zfcp_fc_ns_handler_data compl_rec; |
cc8c2829 SS |
539 | int ret; |
540 | ||
541 | /* prepare CT IU for GPN_FT */ | |
542 | req->header.revision = ZFCP_CT_REVISION; | |
543 | req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; | |
544 | req->header.gs_subtype = ZFCP_CT_NAME_SERVER; | |
545 | req->header.options = ZFCP_CT_SYNCHRONOUS; | |
546 | req->header.cmd_rsp_code = ZFCP_CT_GPN_FT; | |
39eb7e9a | 547 | req->header.max_res_size = max_bytes / 4; |
cc8c2829 SS |
548 | req->flags = 0; |
549 | req->domain_id_scope = 0; | |
550 | req->area_id_scope = 0; | |
551 | req->fc4_type = ZFCP_CT_SCSI_FCP; | |
552 | ||
553 | /* prepare zfcp_send_ct */ | |
9d544f2b | 554 | ct->wka_port = &adapter->gs->ds; |
5ab944f9 SS |
555 | ct->handler = zfcp_fc_ns_handler; |
556 | ct->handler_data = (unsigned long)&compl_rec; | |
cc8c2829 SS |
557 | ct->timeout = 10; |
558 | ct->req = &gpn_ft->sg_req; | |
559 | ct->resp = gpn_ft->sg_resp; | |
cc8c2829 | 560 | |
5ab944f9 SS |
561 | init_completion(&compl_rec.done); |
562 | compl_rec.handler = NULL; | |
cc8c2829 SS |
563 | ret = zfcp_fsf_send_ct(ct, NULL, NULL); |
564 | if (!ret) | |
5ab944f9 | 565 | wait_for_completion(&compl_rec.done); |
cc8c2829 SS |
566 | return ret; |
567 | } | |
568 | ||
569 | static void zfcp_validate_port(struct zfcp_port *port) | |
570 | { | |
571 | struct zfcp_adapter *adapter = port->adapter; | |
572 | ||
6ab35c07 MP |
573 | if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC)) |
574 | return; | |
575 | ||
cc8c2829 SS |
576 | atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status); |
577 | ||
0406289e CS |
578 | if ((port->supported_classes != 0) || |
579 | !list_empty(&port->unit_list_head)) { | |
cc8c2829 SS |
580 | zfcp_port_put(port); |
581 | return; | |
582 | } | |
5ffd51a5 | 583 | zfcp_erp_port_shutdown(port, 0, "fcpval1", NULL); |
cc8c2829 SS |
584 | zfcp_erp_wait(adapter); |
585 | zfcp_port_put(port); | |
586 | zfcp_port_dequeue(port); | |
587 | } | |
588 | ||
39eb7e9a | 589 | static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft, int max_entries) |
cc8c2829 SS |
590 | { |
591 | struct zfcp_send_ct *ct = &gpn_ft->ct; | |
592 | struct scatterlist *sg = gpn_ft->sg_resp; | |
593 | struct ct_hdr *hdr = sg_virt(sg); | |
594 | struct gpn_ft_resp_acc *acc = sg_virt(sg); | |
5ab944f9 | 595 | struct zfcp_adapter *adapter = ct->wka_port->adapter; |
cc8c2829 SS |
596 | struct zfcp_port *port, *tmp; |
597 | u32 d_id; | |
47f7bba5 | 598 | int ret = 0, x, last = 0; |
cc8c2829 SS |
599 | |
600 | if (ct->status) | |
601 | return -EIO; | |
602 | ||
603 | if (hdr->cmd_rsp_code != ZFCP_CT_ACCEPT) { | |
604 | if (hdr->reason_code == ZFCP_CT_UNABLE_TO_PERFORM_CMD) | |
605 | return -EAGAIN; /* might be a temporary condition */ | |
606 | return -EIO; | |
607 | } | |
608 | ||
39eb7e9a CS |
609 | if (hdr->max_res_size) { |
610 | dev_warn(&adapter->ccw_device->dev, | |
611 | "The name server reported %d words residual data\n", | |
612 | hdr->max_res_size); | |
cc8c2829 | 613 | return -E2BIG; |
39eb7e9a | 614 | } |
cc8c2829 SS |
615 | |
616 | down(&zfcp_data.config_sema); | |
617 | ||
618 | /* first entry is the header */ | |
39eb7e9a | 619 | for (x = 1; x < max_entries && !last; x++) { |
cc8c2829 SS |
620 | if (x % (ZFCP_GPN_FT_ENTRIES + 1)) |
621 | acc++; | |
622 | else | |
623 | acc = sg_virt(++sg); | |
624 | ||
47f7bba5 | 625 | last = acc->control & 0x80; |
cc8c2829 SS |
626 | d_id = acc->port_id[0] << 16 | acc->port_id[1] << 8 | |
627 | acc->port_id[2]; | |
628 | ||
5ab944f9 SS |
629 | /* don't attach ports with a well known address */ |
630 | if ((d_id & ZFCP_DID_WKA) == ZFCP_DID_WKA) | |
631 | continue; | |
cc8c2829 | 632 | /* skip the adapter's port and known remote ports */ |
9528539c | 633 | if (acc->wwpn == fc_host_port_name(adapter->scsi_host)) |
cc8c2829 | 634 | continue; |
9528539c | 635 | port = zfcp_get_port_by_wwpn(adapter, acc->wwpn); |
6ab35c07 | 636 | if (port) |
9528539c | 637 | continue; |
cc8c2829 SS |
638 | |
639 | port = zfcp_port_enqueue(adapter, acc->wwpn, | |
cc8c2829 | 640 | ZFCP_STATUS_COMMON_NOESC, d_id); |
317e6b65 SS |
641 | if (IS_ERR(port)) |
642 | ret = PTR_ERR(port); | |
cc8c2829 | 643 | else |
5ffd51a5 | 644 | zfcp_erp_port_reopen(port, 0, "fcegpf1", NULL); |
cc8c2829 SS |
645 | } |
646 | ||
647 | zfcp_erp_wait(adapter); | |
648 | list_for_each_entry_safe(port, tmp, &adapter->port_list_head, list) | |
649 | zfcp_validate_port(port); | |
650 | up(&zfcp_data.config_sema); | |
651 | return ret; | |
652 | } | |
653 | ||
654 | /** | |
655 | * zfcp_scan_ports - scan remote ports and attach new ports | |
656 | * @adapter: pointer to struct zfcp_adapter | |
657 | */ | |
658 | int zfcp_scan_ports(struct zfcp_adapter *adapter) | |
659 | { | |
660 | int ret, i; | |
661 | struct zfcp_gpn_ft *gpn_ft; | |
39eb7e9a CS |
662 | int chain, max_entries, buf_num, max_bytes; |
663 | ||
664 | chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS; | |
665 | buf_num = chain ? ZFCP_GPN_FT_BUFFERS : 1; | |
666 | max_entries = chain ? ZFCP_GPN_FT_MAX_ENTRIES : ZFCP_GPN_FT_ENTRIES; | |
667 | max_bytes = chain ? ZFCP_GPN_FT_MAX_SIZE : ZFCP_CT_SIZE_ONE_PAGE; | |
cc8c2829 | 668 | |
306b6edc SS |
669 | if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && |
670 | fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) | |
cc8c2829 SS |
671 | return 0; |
672 | ||
9d544f2b | 673 | ret = zfcp_wka_port_get(&adapter->gs->ds); |
cc8c2829 SS |
674 | if (ret) |
675 | return ret; | |
676 | ||
39eb7e9a | 677 | gpn_ft = zfcp_alloc_sg_env(buf_num); |
5ab944f9 SS |
678 | if (!gpn_ft) { |
679 | ret = -ENOMEM; | |
680 | goto out; | |
681 | } | |
cc8c2829 SS |
682 | |
683 | for (i = 0; i < 3; i++) { | |
39eb7e9a | 684 | ret = zfcp_scan_issue_gpn_ft(gpn_ft, adapter, max_bytes); |
cc8c2829 | 685 | if (!ret) { |
39eb7e9a | 686 | ret = zfcp_scan_eval_gpn_ft(gpn_ft, max_entries); |
cc8c2829 SS |
687 | if (ret == -EAGAIN) |
688 | ssleep(1); | |
689 | else | |
690 | break; | |
691 | } | |
692 | } | |
39eb7e9a | 693 | zfcp_free_sg_env(gpn_ft, buf_num); |
5ab944f9 | 694 | out: |
9d544f2b | 695 | zfcp_wka_port_put(&adapter->gs->ds); |
cc8c2829 SS |
696 | return ret; |
697 | } | |
698 | ||
699 | ||
700 | void _zfcp_scan_ports_later(struct work_struct *work) | |
701 | { | |
702 | zfcp_scan_ports(container_of(work, struct zfcp_adapter, scan_work)); | |
703 | } | |
9d544f2b SS |
704 | |
705 | struct zfcp_els_fc_job { | |
706 | struct zfcp_send_els els; | |
707 | struct fc_bsg_job *job; | |
708 | }; | |
709 | ||
710 | static void zfcp_fc_generic_els_handler(unsigned long data) | |
711 | { | |
712 | struct zfcp_els_fc_job *els_fc_job = (struct zfcp_els_fc_job *) data; | |
713 | struct fc_bsg_job *job = els_fc_job->job; | |
714 | struct fc_bsg_reply *reply = job->reply; | |
715 | ||
716 | if (els_fc_job->els.status) { | |
717 | /* request rejected or timed out */ | |
718 | reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_REJECT; | |
719 | goto out; | |
720 | } | |
721 | ||
722 | reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK; | |
dc577d55 | 723 | reply->reply_payload_rcv_len = job->reply_payload.payload_len; |
9d544f2b SS |
724 | |
725 | out: | |
726 | job->state_flags = FC_RQST_STATE_DONE; | |
727 | job->job_done(job); | |
728 | kfree(els_fc_job); | |
729 | } | |
730 | ||
731 | int zfcp_fc_execute_els_fc_job(struct fc_bsg_job *job) | |
732 | { | |
733 | struct zfcp_els_fc_job *els_fc_job; | |
734 | struct fc_rport *rport = job->rport; | |
735 | struct Scsi_Host *shost; | |
736 | struct zfcp_adapter *adapter; | |
737 | struct zfcp_port *port; | |
738 | u8 *port_did; | |
739 | ||
740 | shost = rport ? rport_to_shost(rport) : job->shost; | |
741 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; | |
742 | ||
743 | if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) | |
744 | return -EINVAL; | |
745 | ||
746 | els_fc_job = kzalloc(sizeof(struct zfcp_els_fc_job), GFP_KERNEL); | |
747 | if (!els_fc_job) | |
748 | return -ENOMEM; | |
749 | ||
750 | els_fc_job->els.adapter = adapter; | |
751 | if (rport) { | |
752 | read_lock_irq(&zfcp_data.config_lock); | |
753 | port = rport->dd_data; | |
754 | if (port) | |
dc577d55 | 755 | els_fc_job->els.d_id = port->d_id; |
9d544f2b SS |
756 | read_unlock_irq(&zfcp_data.config_lock); |
757 | if (!port) { | |
758 | kfree(els_fc_job); | |
759 | return -EINVAL; | |
760 | } | |
9d544f2b SS |
761 | } else { |
762 | port_did = job->request->rqst_data.h_els.port_id; | |
763 | els_fc_job->els.d_id = (port_did[0] << 16) + | |
764 | (port_did[1] << 8) + port_did[2]; | |
765 | } | |
766 | ||
767 | els_fc_job->els.req = job->request_payload.sg_list; | |
768 | els_fc_job->els.resp = job->reply_payload.sg_list; | |
769 | els_fc_job->els.handler = zfcp_fc_generic_els_handler; | |
770 | els_fc_job->els.handler_data = (unsigned long) els_fc_job; | |
771 | els_fc_job->job = job; | |
772 | ||
773 | return zfcp_fsf_send_els(&els_fc_job->els); | |
774 | } | |
775 | ||
776 | struct zfcp_ct_fc_job { | |
777 | struct zfcp_send_ct ct; | |
778 | struct fc_bsg_job *job; | |
779 | }; | |
780 | ||
781 | static void zfcp_fc_generic_ct_handler(unsigned long data) | |
782 | { | |
783 | struct zfcp_ct_fc_job *ct_fc_job = (struct zfcp_ct_fc_job *) data; | |
784 | struct fc_bsg_job *job = ct_fc_job->job; | |
785 | ||
786 | job->reply->reply_data.ctels_reply.status = ct_fc_job->ct.status ? | |
787 | FC_CTELS_STATUS_REJECT : FC_CTELS_STATUS_OK; | |
dc577d55 | 788 | job->reply->reply_payload_rcv_len = job->reply_payload.payload_len; |
9d544f2b | 789 | job->state_flags = FC_RQST_STATE_DONE; |
9d544f2b SS |
790 | job->job_done(job); |
791 | ||
792 | zfcp_wka_port_put(ct_fc_job->ct.wka_port); | |
793 | ||
794 | kfree(ct_fc_job); | |
795 | } | |
796 | ||
797 | int zfcp_fc_execute_ct_fc_job(struct fc_bsg_job *job) | |
798 | { | |
799 | int ret; | |
800 | u8 gs_type; | |
801 | struct fc_rport *rport = job->rport; | |
802 | struct Scsi_Host *shost; | |
803 | struct zfcp_adapter *adapter; | |
804 | struct zfcp_ct_fc_job *ct_fc_job; | |
805 | u32 preamble_word1; | |
806 | ||
807 | shost = rport ? rport_to_shost(rport) : job->shost; | |
808 | ||
809 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; | |
810 | if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) | |
811 | return -EINVAL; | |
812 | ||
813 | ct_fc_job = kzalloc(sizeof(struct zfcp_ct_fc_job), GFP_KERNEL); | |
814 | if (!ct_fc_job) | |
815 | return -ENOMEM; | |
816 | ||
817 | preamble_word1 = job->request->rqst_data.r_ct.preamble_word1; | |
818 | gs_type = (preamble_word1 & 0xff000000) >> 24; | |
819 | ||
820 | switch (gs_type) { | |
821 | case FC_FST_ALIAS: | |
822 | ct_fc_job->ct.wka_port = &adapter->gs->as; | |
823 | break; | |
824 | case FC_FST_MGMT: | |
825 | ct_fc_job->ct.wka_port = &adapter->gs->ms; | |
826 | break; | |
827 | case FC_FST_TIME: | |
828 | ct_fc_job->ct.wka_port = &adapter->gs->ts; | |
829 | break; | |
830 | case FC_FST_DIR: | |
831 | ct_fc_job->ct.wka_port = &adapter->gs->ds; | |
832 | break; | |
833 | default: | |
834 | kfree(ct_fc_job); | |
835 | return -EINVAL; /* no such service */ | |
836 | } | |
837 | ||
838 | ret = zfcp_wka_port_get(ct_fc_job->ct.wka_port); | |
839 | if (ret) { | |
840 | kfree(ct_fc_job); | |
841 | return ret; | |
842 | } | |
843 | ||
844 | ct_fc_job->ct.req = job->request_payload.sg_list; | |
845 | ct_fc_job->ct.resp = job->reply_payload.sg_list; | |
846 | ct_fc_job->ct.timeout = ZFCP_FSF_REQUEST_TIMEOUT; | |
847 | ct_fc_job->ct.handler = zfcp_fc_generic_ct_handler; | |
848 | ct_fc_job->ct.handler_data = (unsigned long) ct_fc_job; | |
849 | ct_fc_job->ct.completion = NULL; | |
850 | ct_fc_job->job = job; | |
851 | ||
852 | ret = zfcp_fsf_send_ct(&ct_fc_job->ct, NULL, NULL); | |
853 | if (ret) { | |
854 | kfree(ct_fc_job); | |
855 | zfcp_wka_port_put(ct_fc_job->ct.wka_port); | |
856 | } | |
857 | return ret; | |
858 | } |