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Commit | Line | Data |
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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 | ||
82 | wait_event_timeout( | |
83 | wka_port->completion_wq, | |
84 | wka_port->status == ZFCP_WKA_PORT_ONLINE || | |
85 | wka_port->status == ZFCP_WKA_PORT_OFFLINE, | |
86 | HZ >> 1); | |
87 | ||
88 | if (wka_port->status == ZFCP_WKA_PORT_ONLINE) { | |
89 | atomic_inc(&wka_port->refcount); | |
90 | return 0; | |
91 | } | |
92 | return -EIO; | |
93 | } | |
94 | ||
95 | static void zfcp_wka_port_offline(struct work_struct *work) | |
96 | { | |
bf6aede7 | 97 | struct delayed_work *dw = to_delayed_work(work); |
5ab944f9 SS |
98 | struct zfcp_wka_port *wka_port = |
99 | container_of(dw, struct zfcp_wka_port, work); | |
100 | ||
5ab944f9 SS |
101 | mutex_lock(&wka_port->mutex); |
102 | if ((atomic_read(&wka_port->refcount) != 0) || | |
103 | (wka_port->status != ZFCP_WKA_PORT_ONLINE)) | |
104 | goto out; | |
105 | ||
106 | wka_port->status = ZFCP_WKA_PORT_CLOSING; | |
107 | if (zfcp_fsf_close_wka_port(wka_port)) { | |
108 | wka_port->status = ZFCP_WKA_PORT_OFFLINE; | |
109 | wake_up(&wka_port->completion_wq); | |
110 | } | |
111 | out: | |
112 | mutex_unlock(&wka_port->mutex); | |
113 | } | |
114 | ||
115 | static void zfcp_wka_port_put(struct zfcp_wka_port *wka_port) | |
116 | { | |
117 | if (atomic_dec_return(&wka_port->refcount) != 0) | |
118 | return; | |
19af5cdb | 119 | /* wait 10 milliseconds, other reqs might pop in */ |
5ab944f9 SS |
120 | schedule_delayed_work(&wka_port->work, HZ / 100); |
121 | } | |
122 | ||
123 | void zfcp_fc_nameserver_init(struct zfcp_adapter *adapter) | |
124 | { | |
125 | struct zfcp_wka_port *wka_port = &adapter->nsp; | |
126 | ||
127 | init_waitqueue_head(&wka_port->completion_wq); | |
128 | ||
129 | wka_port->adapter = adapter; | |
130 | wka_port->d_id = ZFCP_DID_DIRECTORY_SERVICE; | |
131 | ||
132 | wka_port->status = ZFCP_WKA_PORT_OFFLINE; | |
133 | atomic_set(&wka_port->refcount, 0); | |
134 | mutex_init(&wka_port->mutex); | |
135 | INIT_DELAYED_WORK(&wka_port->work, zfcp_wka_port_offline); | |
136 | } | |
137 | ||
828bc121 SS |
138 | void zfcp_fc_wka_port_force_offline(struct zfcp_wka_port *wka) |
139 | { | |
140 | cancel_delayed_work_sync(&wka->work); | |
141 | mutex_lock(&wka->mutex); | |
142 | wka->status = ZFCP_WKA_PORT_OFFLINE; | |
143 | mutex_unlock(&wka->mutex); | |
144 | } | |
145 | ||
24073b47 CS |
146 | static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, |
147 | struct fcp_rscn_element *elem) | |
148 | { | |
149 | unsigned long flags; | |
150 | struct zfcp_port *port; | |
151 | ||
152 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
24095490 SS |
153 | list_for_each_entry(port, &fsf_req->adapter->port_list_head, list) |
154 | if ((port->d_id & range) == (elem->nport_did & range)) | |
24073b47 | 155 | zfcp_test_link(port); |
24095490 | 156 | |
24073b47 CS |
157 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); |
158 | } | |
159 | ||
160 | static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) | |
161 | { | |
162 | struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data; | |
163 | struct fcp_rscn_head *fcp_rscn_head; | |
164 | struct fcp_rscn_element *fcp_rscn_element; | |
165 | u16 i; | |
166 | u16 no_entries; | |
167 | u32 range_mask; | |
168 | ||
c41f8cbd SS |
169 | fcp_rscn_head = (struct fcp_rscn_head *) status_buffer->payload.data; |
170 | fcp_rscn_element = (struct fcp_rscn_element *) fcp_rscn_head; | |
24073b47 CS |
171 | |
172 | /* see FC-FS */ | |
173 | no_entries = fcp_rscn_head->payload_len / | |
174 | sizeof(struct fcp_rscn_element); | |
175 | ||
176 | for (i = 1; i < no_entries; i++) { | |
177 | /* skip head and start with 1st element */ | |
178 | fcp_rscn_element++; | |
e0d7fcb5 | 179 | range_mask = rscn_range_mask[fcp_rscn_element->addr_format]; |
24073b47 CS |
180 | _zfcp_fc_incoming_rscn(fsf_req, range_mask, fcp_rscn_element); |
181 | } | |
cc8c2829 | 182 | schedule_work(&fsf_req->adapter->scan_work); |
24073b47 CS |
183 | } |
184 | ||
7ba58c9c | 185 | static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn) |
24073b47 CS |
186 | { |
187 | struct zfcp_adapter *adapter = req->adapter; | |
188 | struct zfcp_port *port; | |
189 | unsigned long flags; | |
190 | ||
191 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
192 | list_for_each_entry(port, &adapter->port_list_head, list) | |
193 | if (port->wwpn == wwpn) | |
194 | break; | |
195 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
196 | ||
197 | if (port && (port->wwpn == wwpn)) | |
5ffd51a5 | 198 | zfcp_erp_port_forced_reopen(port, 0, "fciwwp1", req); |
24073b47 CS |
199 | } |
200 | ||
201 | static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req) | |
202 | { | |
203 | struct fsf_status_read_buffer *status_buffer = | |
204 | (struct fsf_status_read_buffer *)req->data; | |
205 | struct fsf_plogi *els_plogi = | |
c41f8cbd | 206 | (struct fsf_plogi *) status_buffer->payload.data; |
24073b47 CS |
207 | |
208 | zfcp_fc_incoming_wwpn(req, els_plogi->serv_param.wwpn); | |
209 | } | |
210 | ||
211 | static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req) | |
212 | { | |
213 | struct fsf_status_read_buffer *status_buffer = | |
214 | (struct fsf_status_read_buffer *)req->data; | |
c41f8cbd SS |
215 | struct fcp_logo *els_logo = |
216 | (struct fcp_logo *) status_buffer->payload.data; | |
24073b47 CS |
217 | |
218 | zfcp_fc_incoming_wwpn(req, els_logo->nport_wwpn); | |
219 | } | |
220 | ||
221 | /** | |
222 | * zfcp_fc_incoming_els - handle incoming ELS | |
223 | * @fsf_req - request which contains incoming ELS | |
224 | */ | |
225 | void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req) | |
226 | { | |
227 | struct fsf_status_read_buffer *status_buffer = | |
228 | (struct fsf_status_read_buffer *) fsf_req->data; | |
c41f8cbd | 229 | unsigned int els_type = status_buffer->payload.data[0]; |
24073b47 CS |
230 | |
231 | zfcp_san_dbf_event_incoming_els(fsf_req); | |
232 | if (els_type == LS_PLOGI) | |
233 | zfcp_fc_incoming_plogi(fsf_req); | |
234 | else if (els_type == LS_LOGO) | |
235 | zfcp_fc_incoming_logo(fsf_req); | |
236 | else if (els_type == LS_RSCN) | |
237 | zfcp_fc_incoming_rscn(fsf_req); | |
238 | } | |
239 | ||
5ab944f9 SS |
240 | static void zfcp_fc_ns_handler(unsigned long data) |
241 | { | |
242 | struct zfcp_fc_ns_handler_data *compl_rec = | |
243 | (struct zfcp_fc_ns_handler_data *) data; | |
244 | ||
245 | if (compl_rec->handler) | |
246 | compl_rec->handler(compl_rec->handler_data); | |
247 | ||
248 | complete(&compl_rec->done); | |
249 | } | |
250 | ||
251 | static void zfcp_fc_ns_gid_pn_eval(unsigned long data) | |
24073b47 CS |
252 | { |
253 | struct zfcp_gid_pn_data *gid_pn = (struct zfcp_gid_pn_data *) data; | |
254 | struct zfcp_send_ct *ct = &gid_pn->ct; | |
255 | struct ct_iu_gid_pn_req *ct_iu_req = sg_virt(ct->req); | |
256 | struct ct_iu_gid_pn_resp *ct_iu_resp = sg_virt(ct->resp); | |
257 | struct zfcp_port *port = gid_pn->port; | |
258 | ||
259 | if (ct->status) | |
5ab944f9 | 260 | return; |
a5b11dda | 261 | if (ct_iu_resp->header.cmd_rsp_code != ZFCP_CT_ACCEPT) |
5ab944f9 | 262 | return; |
a5b11dda | 263 | |
24073b47 CS |
264 | /* paranoia */ |
265 | if (ct_iu_req->wwpn != port->wwpn) | |
5ab944f9 | 266 | return; |
24073b47 CS |
267 | /* looks like a valid d_id */ |
268 | port->d_id = ct_iu_resp->d_id & ZFCP_DID_MASK; | |
24073b47 CS |
269 | } |
270 | ||
5ab944f9 SS |
271 | int static zfcp_fc_ns_gid_pn_request(struct zfcp_erp_action *erp_action, |
272 | struct zfcp_gid_pn_data *gid_pn) | |
24073b47 | 273 | { |
24073b47 | 274 | struct zfcp_adapter *adapter = erp_action->adapter; |
5ab944f9 SS |
275 | struct zfcp_fc_ns_handler_data compl_rec; |
276 | int ret; | |
24073b47 CS |
277 | |
278 | /* setup parameters for send generic command */ | |
279 | gid_pn->port = erp_action->port; | |
5ab944f9 SS |
280 | gid_pn->ct.wka_port = &adapter->nsp; |
281 | gid_pn->ct.handler = zfcp_fc_ns_handler; | |
282 | gid_pn->ct.handler_data = (unsigned long) &compl_rec; | |
24073b47 CS |
283 | gid_pn->ct.timeout = ZFCP_NS_GID_PN_TIMEOUT; |
284 | gid_pn->ct.req = &gid_pn->req; | |
285 | gid_pn->ct.resp = &gid_pn->resp; | |
24073b47 CS |
286 | sg_init_one(&gid_pn->req, &gid_pn->ct_iu_req, |
287 | sizeof(struct ct_iu_gid_pn_req)); | |
288 | sg_init_one(&gid_pn->resp, &gid_pn->ct_iu_resp, | |
289 | sizeof(struct ct_iu_gid_pn_resp)); | |
290 | ||
291 | /* setup nameserver request */ | |
292 | gid_pn->ct_iu_req.header.revision = ZFCP_CT_REVISION; | |
293 | gid_pn->ct_iu_req.header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; | |
294 | gid_pn->ct_iu_req.header.gs_subtype = ZFCP_CT_NAME_SERVER; | |
295 | gid_pn->ct_iu_req.header.options = ZFCP_CT_SYNCHRONOUS; | |
296 | gid_pn->ct_iu_req.header.cmd_rsp_code = ZFCP_CT_GID_PN; | |
39eb7e9a | 297 | gid_pn->ct_iu_req.header.max_res_size = ZFCP_CT_SIZE_ONE_PAGE / 4; |
24073b47 CS |
298 | gid_pn->ct_iu_req.wwpn = erp_action->port->wwpn; |
299 | ||
5ab944f9 SS |
300 | init_completion(&compl_rec.done); |
301 | compl_rec.handler = zfcp_fc_ns_gid_pn_eval; | |
302 | compl_rec.handler_data = (unsigned long) gid_pn; | |
24073b47 CS |
303 | ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.fsf_req_erp, |
304 | erp_action); | |
5ab944f9 SS |
305 | if (!ret) |
306 | wait_for_completion(&compl_rec.done); | |
307 | return ret; | |
308 | } | |
309 | ||
310 | /** | |
311 | * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request | |
312 | * @erp_action: pointer to zfcp_erp_action where GID_PN request is needed | |
313 | * return: -ENOMEM on error, 0 otherwise | |
314 | */ | |
315 | int zfcp_fc_ns_gid_pn(struct zfcp_erp_action *erp_action) | |
316 | { | |
317 | int ret; | |
318 | struct zfcp_gid_pn_data *gid_pn; | |
319 | struct zfcp_adapter *adapter = erp_action->adapter; | |
320 | ||
321 | gid_pn = mempool_alloc(adapter->pool.data_gid_pn, GFP_ATOMIC); | |
322 | if (!gid_pn) | |
323 | return -ENOMEM; | |
324 | ||
325 | memset(gid_pn, 0, sizeof(*gid_pn)); | |
326 | ||
327 | ret = zfcp_wka_port_get(&adapter->nsp); | |
24073b47 | 328 | if (ret) |
5ab944f9 SS |
329 | goto out; |
330 | ||
331 | ret = zfcp_fc_ns_gid_pn_request(erp_action, gid_pn); | |
332 | ||
333 | zfcp_wka_port_put(&adapter->nsp); | |
334 | out: | |
335 | mempool_free(gid_pn, adapter->pool.data_gid_pn); | |
24073b47 CS |
336 | return ret; |
337 | } | |
338 | ||
339 | /** | |
340 | * zfcp_fc_plogi_evaluate - evaluate PLOGI playload | |
341 | * @port: zfcp_port structure | |
342 | * @plogi: plogi payload | |
343 | * | |
344 | * Evaluate PLOGI playload and copy important fields into zfcp_port structure | |
345 | */ | |
346 | void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fsf_plogi *plogi) | |
347 | { | |
348 | port->maxframe_size = plogi->serv_param.common_serv_param[7] | | |
349 | ((plogi->serv_param.common_serv_param[6] & 0x0F) << 8); | |
350 | if (plogi->serv_param.class1_serv_param[0] & 0x80) | |
351 | port->supported_classes |= FC_COS_CLASS1; | |
352 | if (plogi->serv_param.class2_serv_param[0] & 0x80) | |
353 | port->supported_classes |= FC_COS_CLASS2; | |
354 | if (plogi->serv_param.class3_serv_param[0] & 0x80) | |
355 | port->supported_classes |= FC_COS_CLASS3; | |
356 | if (plogi->serv_param.class4_serv_param[0] & 0x80) | |
357 | port->supported_classes |= FC_COS_CLASS4; | |
358 | } | |
359 | ||
360 | struct zfcp_els_adisc { | |
361 | struct zfcp_send_els els; | |
362 | struct scatterlist req; | |
363 | struct scatterlist resp; | |
364 | struct zfcp_ls_adisc ls_adisc; | |
44cc76f2 | 365 | struct zfcp_ls_adisc ls_adisc_acc; |
24073b47 CS |
366 | }; |
367 | ||
368 | static void zfcp_fc_adisc_handler(unsigned long data) | |
369 | { | |
370 | struct zfcp_els_adisc *adisc = (struct zfcp_els_adisc *) data; | |
371 | struct zfcp_port *port = adisc->els.port; | |
44cc76f2 | 372 | struct zfcp_ls_adisc *ls_adisc = &adisc->ls_adisc_acc; |
24073b47 | 373 | |
3968ce80 | 374 | if (adisc->els.status) { |
24073b47 | 375 | /* request rejected or timed out */ |
5b43e719 SS |
376 | zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, |
377 | "fcadh_1", NULL); | |
24073b47 CS |
378 | goto out; |
379 | } | |
380 | ||
381 | if (!port->wwnn) | |
382 | port->wwnn = ls_adisc->wwnn; | |
383 | ||
24095490 | 384 | if ((port->wwpn != ls_adisc->wwpn) || |
a2fa0aed | 385 | !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) { |
24095490 SS |
386 | zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, |
387 | "fcadh_2", NULL); | |
a2fa0aed CS |
388 | goto out; |
389 | } | |
24073b47 | 390 | |
a2fa0aed CS |
391 | /* port is good, unblock rport without going through erp */ |
392 | zfcp_scsi_schedule_rport_register(port); | |
24073b47 CS |
393 | out: |
394 | zfcp_port_put(port); | |
395 | kfree(adisc); | |
396 | } | |
397 | ||
398 | static int zfcp_fc_adisc(struct zfcp_port *port) | |
399 | { | |
400 | struct zfcp_els_adisc *adisc; | |
401 | struct zfcp_adapter *adapter = port->adapter; | |
402 | ||
403 | adisc = kzalloc(sizeof(struct zfcp_els_adisc), GFP_ATOMIC); | |
404 | if (!adisc) | |
405 | return -ENOMEM; | |
406 | ||
407 | adisc->els.req = &adisc->req; | |
408 | adisc->els.resp = &adisc->resp; | |
409 | sg_init_one(adisc->els.req, &adisc->ls_adisc, | |
410 | sizeof(struct zfcp_ls_adisc)); | |
411 | sg_init_one(adisc->els.resp, &adisc->ls_adisc_acc, | |
44cc76f2 | 412 | sizeof(struct zfcp_ls_adisc)); |
24073b47 | 413 | |
24073b47 CS |
414 | adisc->els.adapter = adapter; |
415 | adisc->els.port = port; | |
416 | adisc->els.d_id = port->d_id; | |
417 | adisc->els.handler = zfcp_fc_adisc_handler; | |
418 | adisc->els.handler_data = (unsigned long) adisc; | |
419 | adisc->els.ls_code = adisc->ls_adisc.code = ZFCP_LS_ADISC; | |
420 | ||
421 | /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports | |
422 | without FC-AL-2 capability, so we don't set it */ | |
423 | adisc->ls_adisc.wwpn = fc_host_port_name(adapter->scsi_host); | |
424 | adisc->ls_adisc.wwnn = fc_host_node_name(adapter->scsi_host); | |
425 | adisc->ls_adisc.nport_id = fc_host_port_id(adapter->scsi_host); | |
426 | ||
427 | return zfcp_fsf_send_els(&adisc->els); | |
428 | } | |
429 | ||
8fdf30d5 | 430 | void zfcp_fc_link_test_work(struct work_struct *work) |
24073b47 | 431 | { |
8fdf30d5 CS |
432 | struct zfcp_port *port = |
433 | container_of(work, struct zfcp_port, test_link_work); | |
24073b47 CS |
434 | int retval; |
435 | ||
a2fa0aed CS |
436 | zfcp_port_get(port); |
437 | port->rport_task = RPORT_DEL; | |
438 | zfcp_scsi_rport_work(&port->rport_work); | |
439 | ||
24073b47 | 440 | retval = zfcp_fc_adisc(port); |
9528539c | 441 | if (retval == 0) |
24073b47 CS |
442 | return; |
443 | ||
444 | /* send of ADISC was not possible */ | |
a2fa0aed CS |
445 | zfcp_erp_port_forced_reopen(port, 0, "fcltwk1", NULL); |
446 | ||
24073b47 | 447 | zfcp_port_put(port); |
24073b47 | 448 | } |
cc8c2829 | 449 | |
8fdf30d5 CS |
450 | /** |
451 | * zfcp_test_link - lightweight link test procedure | |
452 | * @port: port to be tested | |
453 | * | |
454 | * Test status of a link to a remote port using the ELS command ADISC. | |
455 | * If there is a problem with the remote port, error recovery steps | |
456 | * will be triggered. | |
457 | */ | |
458 | void zfcp_test_link(struct zfcp_port *port) | |
459 | { | |
460 | zfcp_port_get(port); | |
461 | if (!queue_work(zfcp_data.work_queue, &port->test_link_work)) | |
462 | zfcp_port_put(port); | |
463 | } | |
464 | ||
39eb7e9a | 465 | static void zfcp_free_sg_env(struct zfcp_gpn_ft *gpn_ft, int buf_num) |
cc8c2829 SS |
466 | { |
467 | struct scatterlist *sg = &gpn_ft->sg_req; | |
468 | ||
469 | kfree(sg_virt(sg)); /* free request buffer */ | |
39eb7e9a | 470 | zfcp_sg_free_table(gpn_ft->sg_resp, buf_num); |
cc8c2829 SS |
471 | |
472 | kfree(gpn_ft); | |
473 | } | |
474 | ||
39eb7e9a | 475 | static struct zfcp_gpn_ft *zfcp_alloc_sg_env(int buf_num) |
cc8c2829 SS |
476 | { |
477 | struct zfcp_gpn_ft *gpn_ft; | |
478 | struct ct_iu_gpn_ft_req *req; | |
479 | ||
480 | gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL); | |
481 | if (!gpn_ft) | |
482 | return NULL; | |
483 | ||
484 | req = kzalloc(sizeof(struct ct_iu_gpn_ft_req), GFP_KERNEL); | |
485 | if (!req) { | |
486 | kfree(gpn_ft); | |
487 | gpn_ft = NULL; | |
488 | goto out; | |
489 | } | |
490 | sg_init_one(&gpn_ft->sg_req, req, sizeof(*req)); | |
491 | ||
39eb7e9a CS |
492 | if (zfcp_sg_setup_table(gpn_ft->sg_resp, buf_num)) { |
493 | zfcp_free_sg_env(gpn_ft, buf_num); | |
cc8c2829 SS |
494 | gpn_ft = NULL; |
495 | } | |
496 | out: | |
497 | return gpn_ft; | |
498 | } | |
499 | ||
500 | ||
501 | static int zfcp_scan_issue_gpn_ft(struct zfcp_gpn_ft *gpn_ft, | |
39eb7e9a CS |
502 | struct zfcp_adapter *adapter, |
503 | int max_bytes) | |
cc8c2829 SS |
504 | { |
505 | struct zfcp_send_ct *ct = &gpn_ft->ct; | |
506 | struct ct_iu_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req); | |
5ab944f9 | 507 | struct zfcp_fc_ns_handler_data compl_rec; |
cc8c2829 SS |
508 | int ret; |
509 | ||
510 | /* prepare CT IU for GPN_FT */ | |
511 | req->header.revision = ZFCP_CT_REVISION; | |
512 | req->header.gs_type = ZFCP_CT_DIRECTORY_SERVICE; | |
513 | req->header.gs_subtype = ZFCP_CT_NAME_SERVER; | |
514 | req->header.options = ZFCP_CT_SYNCHRONOUS; | |
515 | req->header.cmd_rsp_code = ZFCP_CT_GPN_FT; | |
39eb7e9a | 516 | req->header.max_res_size = max_bytes / 4; |
cc8c2829 SS |
517 | req->flags = 0; |
518 | req->domain_id_scope = 0; | |
519 | req->area_id_scope = 0; | |
520 | req->fc4_type = ZFCP_CT_SCSI_FCP; | |
521 | ||
522 | /* prepare zfcp_send_ct */ | |
5ab944f9 SS |
523 | ct->wka_port = &adapter->nsp; |
524 | ct->handler = zfcp_fc_ns_handler; | |
525 | ct->handler_data = (unsigned long)&compl_rec; | |
cc8c2829 SS |
526 | ct->timeout = 10; |
527 | ct->req = &gpn_ft->sg_req; | |
528 | ct->resp = gpn_ft->sg_resp; | |
cc8c2829 | 529 | |
5ab944f9 SS |
530 | init_completion(&compl_rec.done); |
531 | compl_rec.handler = NULL; | |
cc8c2829 SS |
532 | ret = zfcp_fsf_send_ct(ct, NULL, NULL); |
533 | if (!ret) | |
5ab944f9 | 534 | wait_for_completion(&compl_rec.done); |
cc8c2829 SS |
535 | return ret; |
536 | } | |
537 | ||
538 | static void zfcp_validate_port(struct zfcp_port *port) | |
539 | { | |
540 | struct zfcp_adapter *adapter = port->adapter; | |
541 | ||
6ab35c07 MP |
542 | if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC)) |
543 | return; | |
544 | ||
cc8c2829 SS |
545 | atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status); |
546 | ||
0406289e CS |
547 | if ((port->supported_classes != 0) || |
548 | !list_empty(&port->unit_list_head)) { | |
cc8c2829 SS |
549 | zfcp_port_put(port); |
550 | return; | |
551 | } | |
5ffd51a5 | 552 | zfcp_erp_port_shutdown(port, 0, "fcpval1", NULL); |
cc8c2829 SS |
553 | zfcp_erp_wait(adapter); |
554 | zfcp_port_put(port); | |
555 | zfcp_port_dequeue(port); | |
556 | } | |
557 | ||
39eb7e9a | 558 | static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft, int max_entries) |
cc8c2829 SS |
559 | { |
560 | struct zfcp_send_ct *ct = &gpn_ft->ct; | |
561 | struct scatterlist *sg = gpn_ft->sg_resp; | |
562 | struct ct_hdr *hdr = sg_virt(sg); | |
563 | struct gpn_ft_resp_acc *acc = sg_virt(sg); | |
5ab944f9 | 564 | struct zfcp_adapter *adapter = ct->wka_port->adapter; |
cc8c2829 SS |
565 | struct zfcp_port *port, *tmp; |
566 | u32 d_id; | |
47f7bba5 | 567 | int ret = 0, x, last = 0; |
cc8c2829 SS |
568 | |
569 | if (ct->status) | |
570 | return -EIO; | |
571 | ||
572 | if (hdr->cmd_rsp_code != ZFCP_CT_ACCEPT) { | |
573 | if (hdr->reason_code == ZFCP_CT_UNABLE_TO_PERFORM_CMD) | |
574 | return -EAGAIN; /* might be a temporary condition */ | |
575 | return -EIO; | |
576 | } | |
577 | ||
39eb7e9a CS |
578 | if (hdr->max_res_size) { |
579 | dev_warn(&adapter->ccw_device->dev, | |
580 | "The name server reported %d words residual data\n", | |
581 | hdr->max_res_size); | |
cc8c2829 | 582 | return -E2BIG; |
39eb7e9a | 583 | } |
cc8c2829 SS |
584 | |
585 | down(&zfcp_data.config_sema); | |
586 | ||
587 | /* first entry is the header */ | |
39eb7e9a | 588 | for (x = 1; x < max_entries && !last; x++) { |
cc8c2829 SS |
589 | if (x % (ZFCP_GPN_FT_ENTRIES + 1)) |
590 | acc++; | |
591 | else | |
592 | acc = sg_virt(++sg); | |
593 | ||
47f7bba5 | 594 | last = acc->control & 0x80; |
cc8c2829 SS |
595 | d_id = acc->port_id[0] << 16 | acc->port_id[1] << 8 | |
596 | acc->port_id[2]; | |
597 | ||
5ab944f9 SS |
598 | /* don't attach ports with a well known address */ |
599 | if ((d_id & ZFCP_DID_WKA) == ZFCP_DID_WKA) | |
600 | continue; | |
cc8c2829 | 601 | /* skip the adapter's port and known remote ports */ |
9528539c | 602 | if (acc->wwpn == fc_host_port_name(adapter->scsi_host)) |
cc8c2829 | 603 | continue; |
9528539c | 604 | port = zfcp_get_port_by_wwpn(adapter, acc->wwpn); |
6ab35c07 | 605 | if (port) |
9528539c | 606 | continue; |
cc8c2829 SS |
607 | |
608 | port = zfcp_port_enqueue(adapter, acc->wwpn, | |
cc8c2829 | 609 | ZFCP_STATUS_COMMON_NOESC, d_id); |
317e6b65 SS |
610 | if (IS_ERR(port)) |
611 | ret = PTR_ERR(port); | |
cc8c2829 | 612 | else |
5ffd51a5 | 613 | zfcp_erp_port_reopen(port, 0, "fcegpf1", NULL); |
cc8c2829 SS |
614 | } |
615 | ||
616 | zfcp_erp_wait(adapter); | |
617 | list_for_each_entry_safe(port, tmp, &adapter->port_list_head, list) | |
618 | zfcp_validate_port(port); | |
619 | up(&zfcp_data.config_sema); | |
620 | return ret; | |
621 | } | |
622 | ||
623 | /** | |
624 | * zfcp_scan_ports - scan remote ports and attach new ports | |
625 | * @adapter: pointer to struct zfcp_adapter | |
626 | */ | |
627 | int zfcp_scan_ports(struct zfcp_adapter *adapter) | |
628 | { | |
629 | int ret, i; | |
630 | struct zfcp_gpn_ft *gpn_ft; | |
39eb7e9a CS |
631 | int chain, max_entries, buf_num, max_bytes; |
632 | ||
633 | chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS; | |
634 | buf_num = chain ? ZFCP_GPN_FT_BUFFERS : 1; | |
635 | max_entries = chain ? ZFCP_GPN_FT_MAX_ENTRIES : ZFCP_GPN_FT_ENTRIES; | |
636 | max_bytes = chain ? ZFCP_GPN_FT_MAX_SIZE : ZFCP_CT_SIZE_ONE_PAGE; | |
cc8c2829 | 637 | |
306b6edc SS |
638 | if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && |
639 | fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) | |
cc8c2829 SS |
640 | return 0; |
641 | ||
5ab944f9 | 642 | ret = zfcp_wka_port_get(&adapter->nsp); |
cc8c2829 SS |
643 | if (ret) |
644 | return ret; | |
645 | ||
39eb7e9a | 646 | gpn_ft = zfcp_alloc_sg_env(buf_num); |
5ab944f9 SS |
647 | if (!gpn_ft) { |
648 | ret = -ENOMEM; | |
649 | goto out; | |
650 | } | |
cc8c2829 SS |
651 | |
652 | for (i = 0; i < 3; i++) { | |
39eb7e9a | 653 | ret = zfcp_scan_issue_gpn_ft(gpn_ft, adapter, max_bytes); |
cc8c2829 | 654 | if (!ret) { |
39eb7e9a | 655 | ret = zfcp_scan_eval_gpn_ft(gpn_ft, max_entries); |
cc8c2829 SS |
656 | if (ret == -EAGAIN) |
657 | ssleep(1); | |
658 | else | |
659 | break; | |
660 | } | |
661 | } | |
39eb7e9a | 662 | zfcp_free_sg_env(gpn_ft, buf_num); |
5ab944f9 SS |
663 | out: |
664 | zfcp_wka_port_put(&adapter->nsp); | |
cc8c2829 SS |
665 | return ret; |
666 | } | |
667 | ||
668 | ||
669 | void _zfcp_scan_ports_later(struct work_struct *work) | |
670 | { | |
671 | zfcp_scan_ports(container_of(work, struct zfcp_adapter, scan_work)); | |
672 | } |