Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
553448f6 | 2 | * zfcp device driver |
1da177e4 | 3 | * |
553448f6 | 4 | * Implementation of FSF commands. |
1da177e4 | 5 | * |
553448f6 | 6 | * Copyright IBM Corporation 2002, 2008 |
1da177e4 LT |
7 | */ |
8 | ||
1da177e4 LT |
9 | #include "zfcp_ext.h" |
10 | ||
11 | static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *); | |
12 | static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *); | |
13 | static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *); | |
14 | static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *); | |
15 | static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *); | |
16 | static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *); | |
17 | static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *); | |
18 | static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *); | |
19 | static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *); | |
20 | static int zfcp_fsf_send_fcp_command_task_management_handler( | |
21 | struct zfcp_fsf_req *); | |
22 | static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *); | |
23 | static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *); | |
24 | static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *); | |
25 | static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *); | |
45633fdc | 26 | static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *); |
1da177e4 LT |
27 | static inline int zfcp_fsf_req_sbal_check( |
28 | unsigned long *, struct zfcp_qdio_queue *, int); | |
29 | static inline int zfcp_use_one_sbal( | |
30 | struct scatterlist *, int, struct scatterlist *, int); | |
31 | static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int); | |
2abbe866 | 32 | static int zfcp_fsf_req_send(struct zfcp_fsf_req *); |
1da177e4 LT |
33 | static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *); |
34 | static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *); | |
35 | static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *); | |
698ec016 | 36 | static void zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *, u8, |
aef4a983 | 37 | struct fsf_link_down_info *); |
1da177e4 | 38 | static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *); |
1da177e4 LT |
39 | |
40 | /* association between FSF command and FSF QTCB type */ | |
41 | static u32 fsf_qtcb_type[] = { | |
42 | [FSF_QTCB_FCP_CMND] = FSF_IO_COMMAND, | |
43 | [FSF_QTCB_ABORT_FCP_CMND] = FSF_SUPPORT_COMMAND, | |
44 | [FSF_QTCB_OPEN_PORT_WITH_DID] = FSF_SUPPORT_COMMAND, | |
45 | [FSF_QTCB_OPEN_LUN] = FSF_SUPPORT_COMMAND, | |
46 | [FSF_QTCB_CLOSE_LUN] = FSF_SUPPORT_COMMAND, | |
47 | [FSF_QTCB_CLOSE_PORT] = FSF_SUPPORT_COMMAND, | |
48 | [FSF_QTCB_CLOSE_PHYSICAL_PORT] = FSF_SUPPORT_COMMAND, | |
49 | [FSF_QTCB_SEND_ELS] = FSF_SUPPORT_COMMAND, | |
50 | [FSF_QTCB_SEND_GENERIC] = FSF_SUPPORT_COMMAND, | |
51 | [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND, | |
52 | [FSF_QTCB_EXCHANGE_PORT_DATA] = FSF_PORT_COMMAND, | |
53 | [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND, | |
54 | [FSF_QTCB_UPLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND | |
55 | }; | |
56 | ||
57 | static const char zfcp_act_subtable_type[5][8] = { | |
58 | "unknown", "OS", "WWPN", "DID", "LUN" | |
59 | }; | |
60 | ||
553448f6 CS |
61 | static void zfcp_act_eval_err(struct zfcp_adapter *adapter, u32 table) |
62 | { | |
63 | u16 subtable = (table & 0xffff0000) >> 16; | |
64 | u16 rule = table & 0xffff; | |
65 | ||
66 | if (subtable > 0 && | |
67 | subtable < ARRAY_SIZE(zfcp_act_subtable_type)) { | |
68 | dev_warn(&adapter->ccw_device->dev, | |
69 | "Access denied in subtable %s, rule %d.\n", | |
70 | zfcp_act_subtable_type[subtable], rule); | |
71 | } | |
72 | } | |
73 | ||
74 | static void zfcp_fsf_access_denied_port(struct zfcp_fsf_req *req, | |
75 | struct zfcp_port *port) | |
76 | { | |
77 | struct fsf_qtcb_header *header = &req->qtcb->header; | |
78 | dev_warn(&req->adapter->ccw_device->dev, | |
79 | "Access denied, cannot send command to port 0x%016Lx.\n", | |
80 | port->wwpn); | |
81 | zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]); | |
82 | zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]); | |
83 | zfcp_erp_port_access_denied(port, 55, req); | |
84 | req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
85 | } | |
86 | ||
87 | static void zfcp_fsf_access_denied_unit(struct zfcp_fsf_req *req, | |
88 | struct zfcp_unit *unit) | |
89 | { | |
90 | struct fsf_qtcb_header *header = &req->qtcb->header; | |
91 | dev_warn(&req->adapter->ccw_device->dev, | |
92 | "Access denied for unit 0x%016Lx on port 0x%016Lx.\n", | |
93 | unit->fcp_lun, unit->port->wwpn); | |
94 | zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[0]); | |
95 | zfcp_act_eval_err(req->adapter, header->fsf_status_qual.halfword[1]); | |
96 | zfcp_erp_unit_access_denied(unit, 59, req); | |
97 | req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
98 | } | |
99 | ||
100 | static void zfcp_fsf_class_not_supp(struct zfcp_fsf_req *req) | |
101 | { | |
102 | dev_err(&req->adapter->ccw_device->dev, | |
103 | "Required FC class not supported by adapter, " | |
104 | "shutting down adapter.\n"); | |
105 | zfcp_erp_adapter_shutdown(req->adapter, 0, 123, req); | |
106 | req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
107 | } | |
108 | ||
1da177e4 LT |
109 | /****************************************************************/ |
110 | /*************** FSF related Functions *************************/ | |
111 | /****************************************************************/ | |
112 | ||
1da177e4 LT |
113 | /* |
114 | * function: zfcp_fsf_req_alloc | |
115 | * | |
41fa2ada | 116 | * purpose: Obtains an fsf_req and potentially a qtcb (for all but |
1da177e4 LT |
117 | * unsolicited requests) via helper functions |
118 | * Does some initial fsf request set-up. | |
41fa2ada | 119 | * |
1da177e4 LT |
120 | * returns: pointer to allocated fsf_req if successfull |
121 | * NULL otherwise | |
122 | * | |
123 | * locks: none | |
124 | * | |
125 | */ | |
126 | static struct zfcp_fsf_req * | |
127 | zfcp_fsf_req_alloc(mempool_t *pool, int req_flags) | |
128 | { | |
129 | size_t size; | |
130 | void *ptr; | |
131 | struct zfcp_fsf_req *fsf_req = NULL; | |
132 | ||
133 | if (req_flags & ZFCP_REQ_NO_QTCB) | |
134 | size = sizeof(struct zfcp_fsf_req); | |
135 | else | |
dd52e0ea | 136 | size = sizeof(struct zfcp_fsf_req_qtcb); |
1da177e4 | 137 | |
dd52e0ea | 138 | if (likely(pool)) |
1da177e4 | 139 | ptr = mempool_alloc(pool, GFP_ATOMIC); |
dd52e0ea HC |
140 | else { |
141 | if (req_flags & ZFCP_REQ_NO_QTCB) | |
142 | ptr = kmalloc(size, GFP_ATOMIC); | |
143 | else | |
144 | ptr = kmem_cache_alloc(zfcp_data.fsf_req_qtcb_cache, | |
54e6ecb2 | 145 | GFP_ATOMIC); |
dd52e0ea | 146 | } |
1da177e4 | 147 | |
dd52e0ea | 148 | if (unlikely(!ptr)) |
1da177e4 LT |
149 | goto out; |
150 | ||
151 | memset(ptr, 0, size); | |
152 | ||
153 | if (req_flags & ZFCP_REQ_NO_QTCB) { | |
154 | fsf_req = (struct zfcp_fsf_req *) ptr; | |
155 | } else { | |
dd52e0ea HC |
156 | fsf_req = &((struct zfcp_fsf_req_qtcb *) ptr)->fsf_req; |
157 | fsf_req->qtcb = &((struct zfcp_fsf_req_qtcb *) ptr)->qtcb; | |
1da177e4 LT |
158 | } |
159 | ||
160 | fsf_req->pool = pool; | |
161 | ||
162 | out: | |
163 | return fsf_req; | |
164 | } | |
165 | ||
166 | /* | |
167 | * function: zfcp_fsf_req_free | |
168 | * | |
169 | * purpose: Frees the memory of an fsf_req (and potentially a qtcb) or | |
170 | * returns it into the pool via helper functions. | |
171 | * | |
172 | * returns: sod all | |
173 | * | |
174 | * locks: none | |
175 | */ | |
1db2c9c0 | 176 | void |
1da177e4 LT |
177 | zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req) |
178 | { | |
dd52e0ea | 179 | if (likely(fsf_req->pool)) { |
1da177e4 | 180 | mempool_free(fsf_req, fsf_req->pool); |
dd52e0ea HC |
181 | return; |
182 | } | |
183 | ||
184 | if (fsf_req->qtcb) { | |
185 | kmem_cache_free(zfcp_data.fsf_req_qtcb_cache, fsf_req); | |
186 | return; | |
187 | } | |
188 | ||
189 | kfree(fsf_req); | |
1da177e4 LT |
190 | } |
191 | ||
869b2b44 MP |
192 | /* |
193 | * Never ever call this without shutting down the adapter first. | |
194 | * Otherwise the adapter would continue using and corrupting s390 storage. | |
195 | * Included BUG_ON() call to ensure this is done. | |
196 | * ERP is supposed to be the only user of this function. | |
1da177e4 | 197 | */ |
6fcc4711 | 198 | void zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter) |
1da177e4 | 199 | { |
869b2b44 | 200 | struct zfcp_fsf_req *fsf_req, *tmp; |
fea9d6c7 | 201 | unsigned long flags; |
6fcc4711 | 202 | LIST_HEAD(remove_queue); |
869b2b44 | 203 | unsigned int i; |
fea9d6c7 | 204 | |
869b2b44 | 205 | BUG_ON(atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)); |
fea9d6c7 | 206 | spin_lock_irqsave(&adapter->req_list_lock, flags); |
869b2b44 | 207 | for (i = 0; i < REQUEST_LIST_SIZE; i++) |
6fcc4711 | 208 | list_splice_init(&adapter->req_list[i], &remove_queue); |
fea9d6c7 VS |
209 | spin_unlock_irqrestore(&adapter->req_list_lock, flags); |
210 | ||
869b2b44 MP |
211 | list_for_each_entry_safe(fsf_req, tmp, &remove_queue, list) { |
212 | list_del(&fsf_req->list); | |
213 | fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED; | |
214 | zfcp_fsf_req_complete(fsf_req); | |
6fcc4711 | 215 | } |
1da177e4 LT |
216 | } |
217 | ||
218 | /* | |
219 | * function: zfcp_fsf_req_complete | |
220 | * | |
221 | * purpose: Updates active counts and timers for openfcp-reqs | |
222 | * May cleanup request after req_eval returns | |
223 | * | |
224 | * returns: 0 - success | |
225 | * !0 - failure | |
226 | * | |
41fa2ada | 227 | * context: |
1da177e4 LT |
228 | */ |
229 | int | |
230 | zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req) | |
231 | { | |
232 | int retval = 0; | |
233 | int cleanup; | |
1da177e4 LT |
234 | |
235 | if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) { | |
1da177e4 LT |
236 | /* |
237 | * Note: all cleanup handling is done in the callchain of | |
238 | * the function call-chain below. | |
239 | */ | |
240 | zfcp_fsf_status_read_handler(fsf_req); | |
241 | goto out; | |
2abbe866 AH |
242 | } else { |
243 | del_timer(&fsf_req->timer); | |
1da177e4 | 244 | zfcp_fsf_protstatus_eval(fsf_req); |
2abbe866 | 245 | } |
1da177e4 LT |
246 | |
247 | /* | |
41fa2ada SS |
248 | * fsf_req may be deleted due to waking up functions, so |
249 | * cleanup is saved here and used later | |
1da177e4 LT |
250 | */ |
251 | if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP)) | |
252 | cleanup = 1; | |
253 | else | |
254 | cleanup = 0; | |
255 | ||
256 | fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED; | |
257 | ||
258 | /* cleanup request if requested by initiator */ | |
259 | if (likely(cleanup)) { | |
1da177e4 LT |
260 | /* |
261 | * lock must not be held here since it will be | |
262 | * grabed by the called routine, too | |
263 | */ | |
1db2c9c0 | 264 | zfcp_fsf_req_free(fsf_req); |
1da177e4 LT |
265 | } else { |
266 | /* notify initiator waiting for the requests completion */ | |
1da177e4 LT |
267 | /* |
268 | * FIXME: Race! We must not access fsf_req here as it might have been | |
269 | * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED | |
270 | * flag. It's an improbable case. But, we have the same paranoia for | |
271 | * the cleanup flag already. | |
272 | * Might better be handled using complete()? | |
273 | * (setting the flag and doing wakeup ought to be atomic | |
274 | * with regard to checking the flag as long as waitqueue is | |
275 | * part of the to be released structure) | |
276 | */ | |
277 | wake_up(&fsf_req->completion_wq); | |
278 | } | |
279 | ||
280 | out: | |
281 | return retval; | |
282 | } | |
283 | ||
284 | /* | |
285 | * function: zfcp_fsf_protstatus_eval | |
286 | * | |
287 | * purpose: evaluates the QTCB of the finished FSF request | |
288 | * and initiates appropriate actions | |
289 | * (usually calling FSF command specific handlers) | |
290 | * | |
41fa2ada | 291 | * returns: |
1da177e4 | 292 | * |
41fa2ada | 293 | * context: |
1da177e4 LT |
294 | * |
295 | * locks: | |
296 | */ | |
297 | static int | |
298 | zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req) | |
299 | { | |
300 | int retval = 0; | |
301 | struct zfcp_adapter *adapter = fsf_req->adapter; | |
8a36e453 MS |
302 | struct fsf_qtcb *qtcb = fsf_req->qtcb; |
303 | union fsf_prot_status_qual *prot_status_qual = | |
304 | &qtcb->prefix.prot_status_qual; | |
1da177e4 | 305 | |
8a36e453 | 306 | zfcp_hba_dbf_event_fsf_response(fsf_req); |
1da177e4 LT |
307 | |
308 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { | |
1da177e4 LT |
309 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | |
310 | ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */ | |
1da177e4 LT |
311 | goto skip_protstatus; |
312 | } | |
313 | ||
1da177e4 | 314 | /* evaluate FSF Protocol Status */ |
8a36e453 | 315 | switch (qtcb->prefix.prot_status) { |
1da177e4 LT |
316 | |
317 | case FSF_PROT_GOOD: | |
1da177e4 | 318 | case FSF_PROT_FSF_STATUS_PRESENTED: |
1da177e4 LT |
319 | break; |
320 | ||
321 | case FSF_PROT_QTCB_VERSION_ERROR: | |
553448f6 CS |
322 | dev_err(&adapter->ccw_device->dev, |
323 | "The QTCB version requested by zfcp (0x%x) is not " | |
324 | "supported by the FCP adapter (lowest supported 0x%x, " | |
325 | "highest supported 0x%x).\n", | |
326 | ZFCP_QTCB_VERSION, prot_status_qual->word[0], | |
327 | prot_status_qual->word[1]); | |
1f6f7129 | 328 | zfcp_erp_adapter_shutdown(adapter, 0, 117, fsf_req); |
1da177e4 LT |
329 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
330 | break; | |
331 | ||
332 | case FSF_PROT_SEQ_NUMB_ERROR: | |
1f6f7129 | 333 | zfcp_erp_adapter_reopen(adapter, 0, 98, fsf_req); |
1da177e4 LT |
334 | fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; |
335 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
336 | break; | |
337 | ||
338 | case FSF_PROT_UNSUPP_QTCB_TYPE: | |
553448f6 CS |
339 | dev_err(&adapter->ccw_device->dev, |
340 | "Packet header type used by the device driver is " | |
341 | "incompatible with that used on the adapter.\n"); | |
1f6f7129 | 342 | zfcp_erp_adapter_shutdown(adapter, 0, 118, fsf_req); |
1da177e4 LT |
343 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
344 | break; | |
345 | ||
346 | case FSF_PROT_HOST_CONNECTION_INITIALIZING: | |
1da177e4 LT |
347 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
348 | atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT, | |
349 | &(adapter->status)); | |
1da177e4 LT |
350 | break; |
351 | ||
352 | case FSF_PROT_DUPLICATE_REQUEST_ID: | |
553448f6 CS |
353 | dev_err(&adapter->ccw_device->dev, |
354 | "The request identifier 0x%Lx is ambiguous.\n", | |
355 | (unsigned long long)qtcb->bottom.support.req_handle); | |
1f6f7129 | 356 | zfcp_erp_adapter_shutdown(adapter, 0, 78, fsf_req); |
1da177e4 LT |
357 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
358 | break; | |
359 | ||
360 | case FSF_PROT_LINK_DOWN: | |
698ec016 | 361 | zfcp_fsf_link_down_info_eval(fsf_req, 37, |
aef4a983 | 362 | &prot_status_qual->link_down_info); |
9467a9b3 | 363 | /* FIXME: reopening adapter now? better wait for link up */ |
1f6f7129 | 364 | zfcp_erp_adapter_reopen(adapter, 0, 79, fsf_req); |
1da177e4 LT |
365 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
366 | break; | |
367 | ||
368 | case FSF_PROT_REEST_QUEUE: | |
1da177e4 | 369 | /* All ports should be marked as ready to run again */ |
1f6f7129 MP |
370 | zfcp_erp_modify_adapter_status(adapter, 28, NULL, |
371 | ZFCP_STATUS_COMMON_RUNNING, | |
1da177e4 LT |
372 | ZFCP_SET); |
373 | zfcp_erp_adapter_reopen(adapter, | |
374 | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | |
9467a9b3 | 375 | | ZFCP_STATUS_COMMON_ERP_FAILED, |
1f6f7129 | 376 | 99, fsf_req); |
1da177e4 LT |
377 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
378 | break; | |
379 | ||
380 | case FSF_PROT_ERROR_STATE: | |
1f6f7129 | 381 | zfcp_erp_adapter_reopen(adapter, 0, 100, fsf_req); |
1da177e4 LT |
382 | fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY; |
383 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
384 | break; | |
385 | ||
386 | default: | |
553448f6 CS |
387 | dev_err(&adapter->ccw_device->dev, |
388 | "Transfer protocol status information" | |
389 | "provided by the adapter (0x%x) " | |
390 | "is not compatible with the device driver.\n", | |
391 | qtcb->prefix.prot_status); | |
1f6f7129 | 392 | zfcp_erp_adapter_shutdown(adapter, 0, 119, fsf_req); |
1da177e4 LT |
393 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
394 | } | |
395 | ||
396 | skip_protstatus: | |
397 | /* | |
398 | * always call specific handlers to give them a chance to do | |
399 | * something meaningful even in error cases | |
400 | */ | |
401 | zfcp_fsf_fsfstatus_eval(fsf_req); | |
402 | return retval; | |
403 | } | |
404 | ||
405 | /* | |
406 | * function: zfcp_fsf_fsfstatus_eval | |
407 | * | |
408 | * purpose: evaluates FSF status of completed FSF request | |
409 | * and acts accordingly | |
410 | * | |
411 | * returns: | |
412 | */ | |
413 | static int | |
414 | zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req) | |
415 | { | |
416 | int retval = 0; | |
417 | ||
418 | if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { | |
419 | goto skip_fsfstatus; | |
420 | } | |
421 | ||
422 | /* evaluate FSF Status */ | |
423 | switch (fsf_req->qtcb->header.fsf_status) { | |
424 | case FSF_UNKNOWN_COMMAND: | |
553448f6 CS |
425 | dev_err(&fsf_req->adapter->ccw_device->dev, |
426 | "Command issued by the device driver (0x%x) is " | |
427 | "not known by the adapter.\n", | |
428 | fsf_req->qtcb->header.fsf_command); | |
1f6f7129 | 429 | zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 120, fsf_req); |
1da177e4 LT |
430 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
431 | break; | |
432 | ||
1da177e4 | 433 | case FSF_ADAPTER_STATUS_AVAILABLE: |
1da177e4 LT |
434 | zfcp_fsf_fsfstatus_qual_eval(fsf_req); |
435 | break; | |
1da177e4 LT |
436 | } |
437 | ||
438 | skip_fsfstatus: | |
439 | /* | |
440 | * always call specific handlers to give them a chance to do | |
441 | * something meaningful even in error cases | |
442 | */ | |
443 | zfcp_fsf_req_dispatch(fsf_req); | |
444 | ||
445 | return retval; | |
446 | } | |
447 | ||
448 | /* | |
449 | * function: zfcp_fsf_fsfstatus_qual_eval | |
450 | * | |
451 | * purpose: evaluates FSF status-qualifier of completed FSF request | |
452 | * and acts accordingly | |
453 | * | |
454 | * returns: | |
455 | */ | |
456 | static int | |
457 | zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req) | |
458 | { | |
459 | int retval = 0; | |
460 | ||
461 | switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) { | |
462 | case FSF_SQ_FCP_RSP_AVAILABLE: | |
1da177e4 LT |
463 | break; |
464 | case FSF_SQ_RETRY_IF_POSSIBLE: | |
1da177e4 | 465 | /* The SCSI-stack may now issue retries or escalate */ |
1da177e4 LT |
466 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
467 | break; | |
468 | case FSF_SQ_COMMAND_ABORTED: | |
1da177e4 | 469 | /* Carry the aborted state on to upper layer */ |
1da177e4 LT |
470 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED; |
471 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
472 | break; | |
473 | case FSF_SQ_NO_RECOM: | |
553448f6 CS |
474 | dev_err(&fsf_req->adapter->ccw_device->dev, |
475 | "No recommendation could be given for a " | |
476 | "problem on the adapter.\n"); | |
1f6f7129 | 477 | zfcp_erp_adapter_shutdown(fsf_req->adapter, 0, 121, fsf_req); |
1da177e4 LT |
478 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
479 | break; | |
480 | case FSF_SQ_ULP_PROGRAMMING_ERROR: | |
1da177e4 LT |
481 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
482 | break; | |
483 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
484 | case FSF_SQ_NO_RETRY_POSSIBLE: | |
485 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
486 | /* dealt with in the respective functions */ | |
487 | break; | |
488 | default: | |
1da177e4 LT |
489 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
490 | break; | |
491 | } | |
492 | ||
493 | return retval; | |
494 | } | |
495 | ||
aef4a983 MS |
496 | /** |
497 | * zfcp_fsf_link_down_info_eval - evaluate link down information block | |
498 | */ | |
499 | static void | |
698ec016 | 500 | zfcp_fsf_link_down_info_eval(struct zfcp_fsf_req *fsf_req, u8 id, |
aef4a983 MS |
501 | struct fsf_link_down_info *link_down) |
502 | { | |
698ec016 MP |
503 | struct zfcp_adapter *adapter = fsf_req->adapter; |
504 | ||
ee69ab7a MS |
505 | if (atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, |
506 | &adapter->status)) | |
507 | return; | |
508 | ||
509 | atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED, &adapter->status); | |
510 | ||
2f8f3ed5 AH |
511 | if (link_down == NULL) |
512 | goto out; | |
ee69ab7a | 513 | |
aef4a983 MS |
514 | switch (link_down->error_code) { |
515 | case FSF_PSQ_LINK_NO_LIGHT: | |
553448f6 CS |
516 | dev_warn(&fsf_req->adapter->ccw_device->dev, |
517 | "The local link is down: " | |
518 | "no light detected.\n"); | |
aef4a983 MS |
519 | break; |
520 | case FSF_PSQ_LINK_WRAP_PLUG: | |
553448f6 CS |
521 | dev_warn(&fsf_req->adapter->ccw_device->dev, |
522 | "The local link is down: " | |
523 | "wrap plug detected.\n"); | |
aef4a983 MS |
524 | break; |
525 | case FSF_PSQ_LINK_NO_FCP: | |
553448f6 CS |
526 | dev_warn(&fsf_req->adapter->ccw_device->dev, |
527 | "The local link is down: " | |
528 | "adjacent node on link does not support FCP.\n"); | |
aef4a983 MS |
529 | break; |
530 | case FSF_PSQ_LINK_FIRMWARE_UPDATE: | |
553448f6 CS |
531 | dev_warn(&fsf_req->adapter->ccw_device->dev, |
532 | "The local link is down: " | |
533 | "firmware update in progress.\n"); | |
534 | break; | |
aef4a983 | 535 | case FSF_PSQ_LINK_INVALID_WWPN: |
553448f6 CS |
536 | dev_warn(&fsf_req->adapter->ccw_device->dev, |
537 | "The local link is down: " | |
538 | "duplicate or invalid WWPN detected.\n"); | |
aef4a983 MS |
539 | break; |
540 | case FSF_PSQ_LINK_NO_NPIV_SUPPORT: | |
553448f6 CS |
541 | dev_warn(&fsf_req->adapter->ccw_device->dev, |
542 | "The local link is down: " | |
543 | "no support for NPIV by Fabric.\n"); | |
aef4a983 MS |
544 | break; |
545 | case FSF_PSQ_LINK_NO_FCP_RESOURCES: | |
553448f6 CS |
546 | dev_warn(&fsf_req->adapter->ccw_device->dev, |
547 | "The local link is down: " | |
548 | "out of resource in FCP daughtercard.\n"); | |
aef4a983 MS |
549 | break; |
550 | case FSF_PSQ_LINK_NO_FABRIC_RESOURCES: | |
553448f6 CS |
551 | dev_warn(&fsf_req->adapter->ccw_device->dev, |
552 | "The local link is down: " | |
553 | "out of resource in Fabric.\n"); | |
aef4a983 MS |
554 | break; |
555 | case FSF_PSQ_LINK_FABRIC_LOGIN_UNABLE: | |
553448f6 CS |
556 | dev_warn(&fsf_req->adapter->ccw_device->dev, |
557 | "The local link is down: " | |
558 | "unable to login to Fabric.\n"); | |
aef4a983 MS |
559 | break; |
560 | case FSF_PSQ_LINK_WWPN_ASSIGNMENT_CORRUPTED: | |
553448f6 CS |
561 | dev_warn(&fsf_req->adapter->ccw_device->dev, |
562 | "WWPN assignment file corrupted on adapter.\n"); | |
aef4a983 MS |
563 | break; |
564 | case FSF_PSQ_LINK_MODE_TABLE_CURRUPTED: | |
553448f6 CS |
565 | dev_warn(&fsf_req->adapter->ccw_device->dev, |
566 | "Mode table corrupted on adapter.\n"); | |
aef4a983 MS |
567 | break; |
568 | case FSF_PSQ_LINK_NO_WWPN_ASSIGNMENT: | |
553448f6 CS |
569 | dev_warn(&fsf_req->adapter->ccw_device->dev, |
570 | "No WWPN for assignment table on adapter.\n"); | |
aef4a983 MS |
571 | break; |
572 | default: | |
553448f6 CS |
573 | dev_warn(&fsf_req->adapter->ccw_device->dev, |
574 | "The local link to adapter is down.\n"); | |
aef4a983 MS |
575 | } |
576 | ||
2f8f3ed5 | 577 | out: |
1f6f7129 | 578 | zfcp_erp_adapter_failed(adapter, id, fsf_req); |
aef4a983 MS |
579 | } |
580 | ||
1da177e4 LT |
581 | /* |
582 | * function: zfcp_fsf_req_dispatch | |
583 | * | |
584 | * purpose: calls the appropriate command specific handler | |
585 | * | |
41fa2ada | 586 | * returns: |
1da177e4 LT |
587 | */ |
588 | static int | |
589 | zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req) | |
590 | { | |
591 | struct zfcp_erp_action *erp_action = fsf_req->erp_action; | |
1da177e4 LT |
592 | int retval = 0; |
593 | ||
1da177e4 LT |
594 | |
595 | switch (fsf_req->fsf_command) { | |
596 | ||
597 | case FSF_QTCB_FCP_CMND: | |
1da177e4 LT |
598 | zfcp_fsf_send_fcp_command_handler(fsf_req); |
599 | break; | |
600 | ||
601 | case FSF_QTCB_ABORT_FCP_CMND: | |
1da177e4 LT |
602 | zfcp_fsf_abort_fcp_command_handler(fsf_req); |
603 | break; | |
604 | ||
605 | case FSF_QTCB_SEND_GENERIC: | |
1da177e4 LT |
606 | zfcp_fsf_send_ct_handler(fsf_req); |
607 | break; | |
608 | ||
609 | case FSF_QTCB_OPEN_PORT_WITH_DID: | |
1da177e4 LT |
610 | zfcp_fsf_open_port_handler(fsf_req); |
611 | break; | |
612 | ||
613 | case FSF_QTCB_OPEN_LUN: | |
1da177e4 LT |
614 | zfcp_fsf_open_unit_handler(fsf_req); |
615 | break; | |
616 | ||
617 | case FSF_QTCB_CLOSE_LUN: | |
1da177e4 LT |
618 | zfcp_fsf_close_unit_handler(fsf_req); |
619 | break; | |
620 | ||
621 | case FSF_QTCB_CLOSE_PORT: | |
1da177e4 LT |
622 | zfcp_fsf_close_port_handler(fsf_req); |
623 | break; | |
624 | ||
625 | case FSF_QTCB_CLOSE_PHYSICAL_PORT: | |
1da177e4 LT |
626 | zfcp_fsf_close_physical_port_handler(fsf_req); |
627 | break; | |
628 | ||
629 | case FSF_QTCB_EXCHANGE_CONFIG_DATA: | |
1da177e4 LT |
630 | zfcp_fsf_exchange_config_data_handler(fsf_req); |
631 | break; | |
632 | ||
633 | case FSF_QTCB_EXCHANGE_PORT_DATA: | |
1da177e4 LT |
634 | zfcp_fsf_exchange_port_data_handler(fsf_req); |
635 | break; | |
636 | ||
637 | case FSF_QTCB_SEND_ELS: | |
1da177e4 LT |
638 | zfcp_fsf_send_els_handler(fsf_req); |
639 | break; | |
640 | ||
641 | case FSF_QTCB_DOWNLOAD_CONTROL_FILE: | |
1da177e4 LT |
642 | zfcp_fsf_control_file_handler(fsf_req); |
643 | break; | |
644 | ||
645 | case FSF_QTCB_UPLOAD_CONTROL_FILE: | |
1da177e4 LT |
646 | zfcp_fsf_control_file_handler(fsf_req); |
647 | break; | |
1da177e4 LT |
648 | } |
649 | ||
650 | if (!erp_action) | |
651 | return retval; | |
652 | ||
1da177e4 LT |
653 | zfcp_erp_async_handler(erp_action, 0); |
654 | ||
655 | return retval; | |
656 | } | |
657 | ||
658 | /* | |
659 | * function: zfcp_fsf_status_read | |
660 | * | |
661 | * purpose: initiates a Status Read command at the specified adapter | |
662 | * | |
663 | * returns: | |
664 | */ | |
665 | int | |
666 | zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags) | |
667 | { | |
668 | struct zfcp_fsf_req *fsf_req; | |
669 | struct fsf_status_read_buffer *status_buffer; | |
670 | unsigned long lock_flags; | |
671 | volatile struct qdio_buffer_element *sbale; | |
b2141782 | 672 | int retval; |
1da177e4 LT |
673 | |
674 | /* setup new FSF request */ | |
675 | retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS, | |
676 | req_flags | ZFCP_REQ_NO_QTCB, | |
677 | adapter->pool.fsf_req_status_read, | |
678 | &lock_flags, &fsf_req); | |
553448f6 | 679 | if (retval < 0) |
1da177e4 | 680 | goto failed_req_create; |
1da177e4 | 681 | |
00bab910 | 682 | sbale = zfcp_qdio_sbale_req(fsf_req); |
1da177e4 LT |
683 | sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS; |
684 | sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY; | |
685 | fsf_req->sbale_curr = 2; | |
686 | ||
b2141782 | 687 | retval = -ENOMEM; |
1da177e4 LT |
688 | status_buffer = |
689 | mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC); | |
b2141782 | 690 | if (!status_buffer) |
1da177e4 | 691 | goto failed_buf; |
1da177e4 | 692 | memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer)); |
059c97d0 | 693 | fsf_req->data = (unsigned long) status_buffer; |
1da177e4 LT |
694 | |
695 | /* insert pointer to respective buffer */ | |
696 | sbale = zfcp_qdio_sbale_curr(fsf_req); | |
697 | sbale->addr = (void *) status_buffer; | |
698 | sbale->length = sizeof(struct fsf_status_read_buffer); | |
699 | ||
2abbe866 | 700 | retval = zfcp_fsf_req_send(fsf_req); |
553448f6 | 701 | if (retval) |
1da177e4 | 702 | goto failed_req_send; |
1da177e4 | 703 | |
1da177e4 LT |
704 | goto out; |
705 | ||
706 | failed_req_send: | |
707 | mempool_free(status_buffer, adapter->pool.data_status_read); | |
708 | ||
709 | failed_buf: | |
710 | zfcp_fsf_req_free(fsf_req); | |
711 | failed_req_create: | |
8a36e453 | 712 | zfcp_hba_dbf_event_fsf_unsol("fail", adapter, NULL); |
1da177e4 | 713 | out: |
00bab910 | 714 | write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); |
1da177e4 LT |
715 | return retval; |
716 | } | |
717 | ||
718 | static int | |
719 | zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req) | |
720 | { | |
721 | struct fsf_status_read_buffer *status_buffer; | |
722 | struct zfcp_adapter *adapter; | |
723 | struct zfcp_port *port; | |
724 | unsigned long flags; | |
725 | ||
059c97d0 | 726 | status_buffer = (struct fsf_status_read_buffer *) fsf_req->data; |
1da177e4 LT |
727 | adapter = fsf_req->adapter; |
728 | ||
729 | read_lock_irqsave(&zfcp_data.config_lock, flags); | |
730 | list_for_each_entry(port, &adapter->port_list_head, list) | |
731 | if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK)) | |
732 | break; | |
733 | read_unlock_irqrestore(&zfcp_data.config_lock, flags); | |
734 | ||
553448f6 | 735 | if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) |
1da177e4 | 736 | goto out; |
1da177e4 LT |
737 | |
738 | switch (status_buffer->status_subtype) { | |
739 | ||
740 | case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT: | |
1f6f7129 | 741 | zfcp_erp_port_reopen(port, 0, 101, fsf_req); |
1da177e4 LT |
742 | break; |
743 | ||
744 | case FSF_STATUS_READ_SUB_ERROR_PORT: | |
1f6f7129 | 745 | zfcp_erp_port_shutdown(port, 0, 122, fsf_req); |
1da177e4 | 746 | break; |
1da177e4 LT |
747 | } |
748 | out: | |
749 | return 0; | |
750 | } | |
751 | ||
553448f6 CS |
752 | static void zfcp_fsf_bit_error_threshold(struct zfcp_fsf_req *req) |
753 | { | |
754 | struct zfcp_adapter *adapter = req->adapter; | |
755 | struct fsf_status_read_buffer *buf = | |
756 | (struct fsf_status_read_buffer *) req->data; | |
757 | struct fsf_bit_error_payload *err = | |
758 | (struct fsf_bit_error_payload *) buf->payload; | |
759 | dev_warn(&adapter->ccw_device->dev, | |
760 | "Warning: bit error threshold data " | |
761 | "received for the adapter: " | |
762 | "link failures = %i, loss of sync errors = %i, " | |
763 | "loss of signal errors = %i, " | |
764 | "primitive sequence errors = %i, " | |
765 | "invalid transmission word errors = %i, " | |
766 | "CRC errors = %i).\n", | |
767 | err->link_failure_error_count, | |
768 | err->loss_of_sync_error_count, | |
769 | err->loss_of_signal_error_count, | |
770 | err->primitive_sequence_error_count, | |
771 | err->invalid_transmission_word_error_count, | |
772 | err->crc_error_count); | |
773 | dev_warn(&adapter->ccw_device->dev, | |
774 | "Additional bit error threshold data of the adapter: " | |
775 | "primitive sequence event time-outs = %i, " | |
776 | "elastic buffer overrun errors = %i, " | |
777 | "advertised receive buffer-to-buffer credit = %i, " | |
778 | "current receice buffer-to-buffer credit = %i, " | |
779 | "advertised transmit buffer-to-buffer credit = %i, " | |
780 | "current transmit buffer-to-buffer credit = %i).\n", | |
781 | err->primitive_sequence_event_timeout_count, | |
782 | err->elastic_buffer_overrun_error_count, | |
783 | err->advertised_receive_b2b_credit, | |
784 | err->current_receive_b2b_credit, | |
785 | err->advertised_transmit_b2b_credit, | |
786 | err->current_transmit_b2b_credit); | |
787 | } | |
788 | ||
1da177e4 LT |
789 | /* |
790 | * function: zfcp_fsf_status_read_handler | |
791 | * | |
792 | * purpose: is called for finished Open Port command | |
793 | * | |
41fa2ada | 794 | * returns: |
1da177e4 LT |
795 | */ |
796 | static int | |
797 | zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req) | |
798 | { | |
799 | int retval = 0; | |
800 | struct zfcp_adapter *adapter = fsf_req->adapter; | |
801 | struct fsf_status_read_buffer *status_buffer = | |
059c97d0 | 802 | (struct fsf_status_read_buffer *) fsf_req->data; |
1da177e4 LT |
803 | |
804 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) { | |
8a36e453 | 805 | zfcp_hba_dbf_event_fsf_unsol("dism", adapter, status_buffer); |
1da177e4 | 806 | mempool_free(status_buffer, adapter->pool.data_status_read); |
1db2c9c0 | 807 | zfcp_fsf_req_free(fsf_req); |
1da177e4 LT |
808 | goto out; |
809 | } | |
810 | ||
8a36e453 MS |
811 | zfcp_hba_dbf_event_fsf_unsol("read", adapter, status_buffer); |
812 | ||
1da177e4 LT |
813 | switch (status_buffer->status_type) { |
814 | ||
815 | case FSF_STATUS_READ_PORT_CLOSED: | |
1da177e4 LT |
816 | zfcp_fsf_status_read_port_closed(fsf_req); |
817 | break; | |
818 | ||
819 | case FSF_STATUS_READ_INCOMING_ELS: | |
24073b47 | 820 | zfcp_fc_incoming_els(fsf_req); |
1da177e4 LT |
821 | break; |
822 | ||
823 | case FSF_STATUS_READ_SENSE_DATA_AVAIL: | |
1da177e4 LT |
824 | break; |
825 | ||
826 | case FSF_STATUS_READ_BIT_ERROR_THRESHOLD: | |
553448f6 | 827 | zfcp_fsf_bit_error_threshold(fsf_req); |
1da177e4 LT |
828 | break; |
829 | ||
830 | case FSF_STATUS_READ_LINK_DOWN: | |
aef4a983 MS |
831 | switch (status_buffer->status_subtype) { |
832 | case FSF_STATUS_READ_SUB_NO_PHYSICAL_LINK: | |
553448f6 CS |
833 | dev_warn(&adapter->ccw_device->dev, |
834 | "Physical link is down.\n"); | |
698ec016 | 835 | zfcp_fsf_link_down_info_eval(fsf_req, 38, |
ee69ab7a MS |
836 | (struct fsf_link_down_info *) |
837 | &status_buffer->payload); | |
aef4a983 MS |
838 | break; |
839 | case FSF_STATUS_READ_SUB_FDISC_FAILED: | |
553448f6 CS |
840 | dev_warn(&adapter->ccw_device->dev, |
841 | "Local link is down " | |
842 | "due to failed FDISC login.\n"); | |
698ec016 | 843 | zfcp_fsf_link_down_info_eval(fsf_req, 39, |
ee69ab7a MS |
844 | (struct fsf_link_down_info *) |
845 | &status_buffer->payload); | |
aef4a983 MS |
846 | break; |
847 | case FSF_STATUS_READ_SUB_FIRMWARE_UPDATE: | |
553448f6 CS |
848 | dev_warn(&adapter->ccw_device->dev, |
849 | "Local link is down " | |
850 | "due to firmware update on adapter.\n"); | |
698ec016 | 851 | zfcp_fsf_link_down_info_eval(fsf_req, 40, NULL); |
aef4a983 MS |
852 | break; |
853 | default: | |
553448f6 CS |
854 | dev_warn(&adapter->ccw_device->dev, |
855 | "Local link is down.\n"); | |
698ec016 | 856 | zfcp_fsf_link_down_info_eval(fsf_req, 41, NULL); |
aef4a983 | 857 | }; |
1da177e4 LT |
858 | break; |
859 | ||
860 | case FSF_STATUS_READ_LINK_UP: | |
553448f6 CS |
861 | dev_info(&adapter->ccw_device->dev, |
862 | "Local link was replugged.\n"); | |
1da177e4 | 863 | /* All ports should be marked as ready to run again */ |
1f6f7129 | 864 | zfcp_erp_modify_adapter_status(adapter, 30, NULL, |
1da177e4 LT |
865 | ZFCP_STATUS_COMMON_RUNNING, |
866 | ZFCP_SET); | |
867 | zfcp_erp_adapter_reopen(adapter, | |
868 | ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED | |
9467a9b3 | 869 | | ZFCP_STATUS_COMMON_ERP_FAILED, |
1f6f7129 | 870 | 102, fsf_req); |
1da177e4 LT |
871 | break; |
872 | ||
9eb69aff | 873 | case FSF_STATUS_READ_NOTIFICATION_LOST: |
9eb69aff MS |
874 | if (status_buffer->status_subtype & |
875 | FSF_STATUS_READ_SUB_ACT_UPDATED) | |
1f6f7129 | 876 | zfcp_erp_adapter_access_changed(adapter, 135, fsf_req); |
cc8c2829 SS |
877 | if (status_buffer->status_subtype & |
878 | FSF_STATUS_READ_SUB_INCOMING_ELS) | |
879 | schedule_work(&adapter->scan_work); | |
9eb69aff MS |
880 | break; |
881 | ||
1da177e4 | 882 | case FSF_STATUS_READ_CFDC_UPDATED: |
1f6f7129 | 883 | zfcp_erp_adapter_access_changed(adapter, 136, fsf_req); |
1da177e4 LT |
884 | break; |
885 | ||
aef4a983 | 886 | case FSF_STATUS_READ_FEATURE_UPDATE_ALERT: |
aef4a983 MS |
887 | adapter->adapter_features = *(u32*) status_buffer->payload; |
888 | break; | |
1da177e4 LT |
889 | } |
890 | mempool_free(status_buffer, adapter->pool.data_status_read); | |
1db2c9c0 | 891 | zfcp_fsf_req_free(fsf_req); |
1da177e4 LT |
892 | /* |
893 | * recycle buffer and start new request repeat until outbound | |
894 | * queue is empty or adapter shutdown is requested | |
895 | */ | |
896 | /* | |
897 | * FIXME(qdio): | |
898 | * we may wait in the req_create for 5s during shutdown, so | |
899 | * qdio_cleanup will have to wait at least that long before returning | |
900 | * with failure to allow us a proper cleanup under all circumstances | |
901 | */ | |
902 | /* | |
903 | * FIXME: | |
904 | * allocation failure possible? (Is this code needed?) | |
905 | */ | |
d26ab06e SS |
906 | |
907 | atomic_inc(&adapter->stat_miss); | |
908 | schedule_work(&adapter->stat_work); | |
1da177e4 LT |
909 | out: |
910 | return retval; | |
911 | } | |
912 | ||
913 | /* | |
914 | * function: zfcp_fsf_abort_fcp_command | |
915 | * | |
916 | * purpose: tells FSF to abort a running SCSI command | |
917 | * | |
918 | * returns: address of initiated FSF request | |
919 | * NULL - request could not be initiated | |
920 | * | |
41fa2ada | 921 | * FIXME(design): should be watched by a timeout !!! |
1da177e4 LT |
922 | * FIXME(design) shouldn't this be modified to return an int |
923 | * also...don't know how though | |
924 | */ | |
925 | struct zfcp_fsf_req * | |
926 | zfcp_fsf_abort_fcp_command(unsigned long old_req_id, | |
927 | struct zfcp_adapter *adapter, | |
928 | struct zfcp_unit *unit, int req_flags) | |
929 | { | |
930 | volatile struct qdio_buffer_element *sbale; | |
1da177e4 | 931 | struct zfcp_fsf_req *fsf_req = NULL; |
2abbe866 | 932 | unsigned long lock_flags; |
1da177e4 LT |
933 | int retval = 0; |
934 | ||
935 | /* setup new FSF request */ | |
936 | retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND, | |
937 | req_flags, adapter->pool.fsf_req_abort, | |
938 | &lock_flags, &fsf_req); | |
553448f6 | 939 | if (retval < 0) |
1da177e4 | 940 | goto out; |
1da177e4 | 941 | |
951f746f CS |
942 | if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, |
943 | &unit->status))) | |
944 | goto unit_blocked; | |
945 | ||
00bab910 | 946 | sbale = zfcp_qdio_sbale_req(fsf_req); |
1da177e4 LT |
947 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
948 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
949 | ||
059c97d0 | 950 | fsf_req->data = (unsigned long) unit; |
1da177e4 LT |
951 | |
952 | /* set handles of unit and its parent port in QTCB */ | |
953 | fsf_req->qtcb->header.lun_handle = unit->handle; | |
954 | fsf_req->qtcb->header.port_handle = unit->port->handle; | |
955 | ||
956 | /* set handle of request which should be aborted */ | |
957 | fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id; | |
958 | ||
2abbe866 AH |
959 | zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT); |
960 | retval = zfcp_fsf_req_send(fsf_req); | |
951f746f CS |
961 | if (!retval) |
962 | goto out; | |
963 | ||
964 | unit_blocked: | |
1da177e4 LT |
965 | zfcp_fsf_req_free(fsf_req); |
966 | fsf_req = NULL; | |
1da177e4 | 967 | |
1da177e4 | 968 | out: |
00bab910 | 969 | write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); |
1da177e4 LT |
970 | return fsf_req; |
971 | } | |
972 | ||
973 | /* | |
974 | * function: zfcp_fsf_abort_fcp_command_handler | |
975 | * | |
976 | * purpose: is called for finished Abort FCP Command request | |
977 | * | |
41fa2ada | 978 | * returns: |
1da177e4 LT |
979 | */ |
980 | static int | |
981 | zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req) | |
982 | { | |
983 | int retval = -EINVAL; | |
059c97d0 | 984 | struct zfcp_unit *unit; |
8627533c CS |
985 | union fsf_status_qual *fsf_stat_qual = |
986 | &new_fsf_req->qtcb->header.fsf_status_qual; | |
1da177e4 | 987 | |
1da177e4 LT |
988 | if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { |
989 | /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */ | |
990 | goto skip_fsfstatus; | |
991 | } | |
992 | ||
059c97d0 AH |
993 | unit = (struct zfcp_unit *) new_fsf_req->data; |
994 | ||
1da177e4 LT |
995 | /* evaluate FSF status in QTCB */ |
996 | switch (new_fsf_req->qtcb->header.fsf_status) { | |
997 | ||
998 | case FSF_PORT_HANDLE_NOT_VALID: | |
8627533c | 999 | if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) { |
1da177e4 LT |
1000 | /* |
1001 | * In this case a command that was sent prior to a port | |
1002 | * reopen was aborted (handles are different). This is | |
1003 | * fine. | |
1004 | */ | |
1005 | } else { | |
1da177e4 | 1006 | /* Let's hope this sorts out the mess */ |
9467a9b3 | 1007 | zfcp_erp_adapter_reopen(unit->port->adapter, 0, 104, |
1f6f7129 | 1008 | new_fsf_req); |
1da177e4 LT |
1009 | new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1010 | } | |
1011 | break; | |
1012 | ||
1013 | case FSF_LUN_HANDLE_NOT_VALID: | |
8627533c | 1014 | if (fsf_stat_qual->word[0] != fsf_stat_qual->word[1]) { |
1da177e4 LT |
1015 | /* |
1016 | * In this case a command that was sent prior to a unit | |
1017 | * reopen was aborted (handles are different). | |
1018 | * This is fine. | |
1019 | */ | |
1020 | } else { | |
1da177e4 | 1021 | /* Let's hope this sorts out the mess */ |
1f6f7129 | 1022 | zfcp_erp_port_reopen(unit->port, 0, 105, new_fsf_req); |
1da177e4 LT |
1023 | new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1024 | } | |
1025 | break; | |
1026 | ||
1027 | case FSF_FCP_COMMAND_DOES_NOT_EXIST: | |
1da177e4 | 1028 | retval = 0; |
1da177e4 LT |
1029 | new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED; |
1030 | break; | |
1031 | ||
1032 | case FSF_PORT_BOXED: | |
1f6f7129 | 1033 | zfcp_erp_port_boxed(unit->port, 47, new_fsf_req); |
1da177e4 LT |
1034 | new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1035 | | ZFCP_STATUS_FSFREQ_RETRY; | |
1036 | break; | |
1037 | ||
1038 | case FSF_LUN_BOXED: | |
1f6f7129 | 1039 | zfcp_erp_unit_boxed(unit, 48, new_fsf_req); |
1da177e4 LT |
1040 | new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1041 | | ZFCP_STATUS_FSFREQ_RETRY; | |
1042 | break; | |
1043 | ||
1044 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
1045 | switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) { |
1046 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
65a8d4e1 | 1047 | zfcp_test_link(unit->port); |
1da177e4 LT |
1048 | new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1049 | break; | |
1050 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
1da177e4 | 1051 | /* SCSI stack will escalate */ |
1da177e4 LT |
1052 | new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1053 | break; | |
1da177e4 LT |
1054 | } |
1055 | break; | |
1056 | ||
1057 | case FSF_GOOD: | |
1da177e4 LT |
1058 | retval = 0; |
1059 | new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED; | |
1060 | break; | |
1da177e4 LT |
1061 | } |
1062 | skip_fsfstatus: | |
1063 | return retval; | |
1064 | } | |
1065 | ||
1066 | /** | |
1067 | * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into | |
1068 | * one SBALE | |
1069 | * Two scatter-gather lists are passed, one for the reqeust and one for the | |
1070 | * response. | |
1071 | */ | |
1072 | static inline int | |
1073 | zfcp_use_one_sbal(struct scatterlist *req, int req_count, | |
1074 | struct scatterlist *resp, int resp_count) | |
1075 | { | |
1076 | return ((req_count == 1) && | |
1077 | (resp_count == 1) && | |
1078 | (((unsigned long) zfcp_sg_to_address(&req[0]) & | |
1079 | PAGE_MASK) == | |
1080 | ((unsigned long) (zfcp_sg_to_address(&req[0]) + | |
1081 | req[0].length - 1) & PAGE_MASK)) && | |
1082 | (((unsigned long) zfcp_sg_to_address(&resp[0]) & | |
1083 | PAGE_MASK) == | |
1084 | ((unsigned long) (zfcp_sg_to_address(&resp[0]) + | |
1085 | resp[0].length - 1) & PAGE_MASK))); | |
1086 | } | |
1087 | ||
1088 | /** | |
1089 | * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS) | |
1090 | * @ct: pointer to struct zfcp_send_ct which conatins all needed data for | |
1091 | * the request | |
1092 | * @pool: pointer to memory pool, if non-null this pool is used to allocate | |
1093 | * a struct zfcp_fsf_req | |
1094 | * @erp_action: pointer to erp_action, if non-null the Generic Service request | |
1095 | * is sent within error recovery | |
1096 | */ | |
1097 | int | |
1098 | zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool, | |
1099 | struct zfcp_erp_action *erp_action) | |
1100 | { | |
1101 | volatile struct qdio_buffer_element *sbale; | |
1102 | struct zfcp_port *port; | |
1103 | struct zfcp_adapter *adapter; | |
1104 | struct zfcp_fsf_req *fsf_req; | |
1105 | unsigned long lock_flags; | |
1106 | int bytes; | |
1107 | int ret = 0; | |
1108 | ||
1109 | port = ct->port; | |
1110 | adapter = port->adapter; | |
1111 | ||
1112 | ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC, | |
1113 | ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, | |
1114 | pool, &lock_flags, &fsf_req); | |
553448f6 | 1115 | if (ret < 0) |
1da177e4 | 1116 | goto failed_req; |
1da177e4 | 1117 | |
00bab910 | 1118 | sbale = zfcp_qdio_sbale_req(fsf_req); |
1da177e4 LT |
1119 | if (zfcp_use_one_sbal(ct->req, ct->req_count, |
1120 | ct->resp, ct->resp_count)){ | |
1121 | /* both request buffer and response buffer | |
1122 | fit into one sbale each */ | |
1123 | sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; | |
1124 | sbale[2].addr = zfcp_sg_to_address(&ct->req[0]); | |
1125 | sbale[2].length = ct->req[0].length; | |
1126 | sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]); | |
1127 | sbale[3].length = ct->resp[0].length; | |
1128 | sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; | |
aef4a983 | 1129 | } else if (adapter->adapter_features & |
1da177e4 LT |
1130 | FSF_FEATURE_ELS_CT_CHAINED_SBALS) { |
1131 | /* try to use chained SBALs */ | |
1132 | bytes = zfcp_qdio_sbals_from_sg(fsf_req, | |
1133 | SBAL_FLAGS0_TYPE_WRITE_READ, | |
00bab910 | 1134 | ct->req, |
1da177e4 LT |
1135 | ZFCP_MAX_SBALS_PER_CT_REQ); |
1136 | if (bytes <= 0) { | |
1da177e4 LT |
1137 | if (bytes == 0) |
1138 | ret = -ENOMEM; | |
1139 | else | |
1140 | ret = bytes; | |
1141 | ||
1142 | goto failed_send; | |
1143 | } | |
1144 | fsf_req->qtcb->bottom.support.req_buf_length = bytes; | |
1145 | fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; | |
1146 | bytes = zfcp_qdio_sbals_from_sg(fsf_req, | |
1147 | SBAL_FLAGS0_TYPE_WRITE_READ, | |
00bab910 | 1148 | ct->resp, |
1da177e4 LT |
1149 | ZFCP_MAX_SBALS_PER_CT_REQ); |
1150 | if (bytes <= 0) { | |
1da177e4 LT |
1151 | if (bytes == 0) |
1152 | ret = -ENOMEM; | |
1153 | else | |
1154 | ret = bytes; | |
1155 | ||
1156 | goto failed_send; | |
1157 | } | |
1158 | fsf_req->qtcb->bottom.support.resp_buf_length = bytes; | |
1159 | } else { | |
1160 | /* reject send generic request */ | |
1da177e4 LT |
1161 | ret = -EOPNOTSUPP; |
1162 | goto failed_send; | |
1163 | } | |
1164 | ||
1165 | /* settings in QTCB */ | |
1166 | fsf_req->qtcb->header.port_handle = port->handle; | |
06506d00 AH |
1167 | fsf_req->qtcb->bottom.support.service_class = |
1168 | ZFCP_FC_SERVICE_CLASS_DEFAULT; | |
1da177e4 | 1169 | fsf_req->qtcb->bottom.support.timeout = ct->timeout; |
059c97d0 | 1170 | fsf_req->data = (unsigned long) ct; |
1da177e4 | 1171 | |
8a36e453 MS |
1172 | zfcp_san_dbf_event_ct_request(fsf_req); |
1173 | ||
2abbe866 AH |
1174 | if (erp_action) { |
1175 | erp_action->fsf_req = fsf_req; | |
1176 | fsf_req->erp_action = erp_action; | |
1177 | zfcp_erp_start_timer(fsf_req); | |
1178 | } else | |
1179 | zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); | |
1180 | ||
1181 | ret = zfcp_fsf_req_send(fsf_req); | |
553448f6 | 1182 | if (ret) |
1da177e4 | 1183 | goto failed_send; |
1da177e4 | 1184 | |
1da177e4 LT |
1185 | goto out; |
1186 | ||
1187 | failed_send: | |
1188 | zfcp_fsf_req_free(fsf_req); | |
1189 | if (erp_action != NULL) { | |
1190 | erp_action->fsf_req = NULL; | |
1191 | } | |
1192 | failed_req: | |
1193 | out: | |
00bab910 | 1194 | write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); |
1da177e4 LT |
1195 | return ret; |
1196 | } | |
1197 | ||
1198 | /** | |
1199 | * zfcp_fsf_send_ct_handler - handler for Generic Service requests | |
1200 | * @fsf_req: pointer to struct zfcp_fsf_req | |
1201 | * | |
059c97d0 AH |
1202 | * Data specific for the Generic Service request is passed using |
1203 | * fsf_req->data. There we find the pointer to struct zfcp_send_ct. | |
1204 | * Usually a specific handler for the CT request is called which is | |
1205 | * found in this structure. | |
1da177e4 LT |
1206 | */ |
1207 | static int | |
1208 | zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req) | |
1209 | { | |
1210 | struct zfcp_port *port; | |
1211 | struct zfcp_adapter *adapter; | |
1212 | struct zfcp_send_ct *send_ct; | |
1213 | struct fsf_qtcb_header *header; | |
1214 | struct fsf_qtcb_bottom_support *bottom; | |
1215 | int retval = -EINVAL; | |
1da177e4 LT |
1216 | |
1217 | adapter = fsf_req->adapter; | |
059c97d0 | 1218 | send_ct = (struct zfcp_send_ct *) fsf_req->data; |
1da177e4 LT |
1219 | port = send_ct->port; |
1220 | header = &fsf_req->qtcb->header; | |
1221 | bottom = &fsf_req->qtcb->bottom.support; | |
1222 | ||
1223 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) | |
1224 | goto skip_fsfstatus; | |
1225 | ||
1226 | /* evaluate FSF status in QTCB */ | |
1227 | switch (header->fsf_status) { | |
1228 | ||
1229 | case FSF_GOOD: | |
8a36e453 | 1230 | zfcp_san_dbf_event_ct_response(fsf_req); |
1da177e4 LT |
1231 | retval = 0; |
1232 | break; | |
1233 | ||
1234 | case FSF_SERVICE_CLASS_NOT_SUPPORTED: | |
553448f6 | 1235 | zfcp_fsf_class_not_supp(fsf_req); |
1da177e4 LT |
1236 | break; |
1237 | ||
1238 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
1239 | switch (header->fsf_status_qual.word[0]){ |
1240 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
1da177e4 | 1241 | /* reopening link to port */ |
1da177e4 LT |
1242 | zfcp_test_link(port); |
1243 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1244 | break; | |
1245 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
1da177e4 | 1246 | /* ERP strategy will escalate */ |
1da177e4 LT |
1247 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1248 | break; | |
1da177e4 LT |
1249 | } |
1250 | break; | |
1251 | ||
1252 | case FSF_ACCESS_DENIED: | |
553448f6 | 1253 | zfcp_fsf_access_denied_port(fsf_req, port); |
1da177e4 LT |
1254 | break; |
1255 | ||
1256 | case FSF_GENERIC_COMMAND_REJECTED: | |
1da177e4 LT |
1257 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1258 | break; | |
1259 | ||
1260 | case FSF_PORT_HANDLE_NOT_VALID: | |
1f6f7129 | 1261 | zfcp_erp_adapter_reopen(adapter, 0, 106, fsf_req); |
1da177e4 LT |
1262 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1263 | break; | |
1264 | ||
1265 | case FSF_PORT_BOXED: | |
1f6f7129 | 1266 | zfcp_erp_port_boxed(port, 49, fsf_req); |
1da177e4 LT |
1267 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
1268 | | ZFCP_STATUS_FSFREQ_RETRY; | |
1269 | break; | |
1270 | ||
1271 | /* following states should never occure, all cases avoided | |
1272 | in zfcp_fsf_send_ct - but who knows ... */ | |
1273 | case FSF_PAYLOAD_SIZE_MISMATCH: | |
1da177e4 | 1274 | case FSF_REQUEST_SIZE_TOO_LARGE: |
1da177e4 | 1275 | case FSF_RESPONSE_SIZE_TOO_LARGE: |
1da177e4 | 1276 | case FSF_SBAL_MISMATCH: |
1da177e4 LT |
1277 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1278 | break; | |
1279 | ||
1280 | default: | |
1da177e4 LT |
1281 | break; |
1282 | } | |
1283 | ||
1284 | skip_fsfstatus: | |
1285 | send_ct->status = retval; | |
1286 | ||
1287 | if (send_ct->handler != NULL) | |
1288 | send_ct->handler(send_ct->handler_data); | |
1289 | ||
1290 | return retval; | |
1291 | } | |
1292 | ||
1293 | /** | |
1294 | * zfcp_fsf_send_els - initiate an ELS command (FC-FS) | |
1295 | * @els: pointer to struct zfcp_send_els which contains all needed data for | |
1296 | * the command. | |
1297 | */ | |
1298 | int | |
1299 | zfcp_fsf_send_els(struct zfcp_send_els *els) | |
1300 | { | |
1301 | volatile struct qdio_buffer_element *sbale; | |
1302 | struct zfcp_fsf_req *fsf_req; | |
13e1e1f0 | 1303 | u32 d_id; |
1da177e4 LT |
1304 | struct zfcp_adapter *adapter; |
1305 | unsigned long lock_flags; | |
1306 | int bytes; | |
1307 | int ret = 0; | |
1308 | ||
1309 | d_id = els->d_id; | |
1310 | adapter = els->adapter; | |
1311 | ||
1312 | ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS, | |
1313 | ZFCP_REQ_AUTO_CLEANUP, | |
1314 | NULL, &lock_flags, &fsf_req); | |
553448f6 | 1315 | if (ret < 0) |
1da177e4 | 1316 | goto failed_req; |
1da177e4 | 1317 | |
3f0ca62a CS |
1318 | if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, |
1319 | &els->port->status))) { | |
1320 | ret = -EBUSY; | |
1321 | goto port_blocked; | |
1322 | } | |
1323 | ||
00bab910 | 1324 | sbale = zfcp_qdio_sbale_req(fsf_req); |
1da177e4 LT |
1325 | if (zfcp_use_one_sbal(els->req, els->req_count, |
1326 | els->resp, els->resp_count)){ | |
1327 | /* both request buffer and response buffer | |
1328 | fit into one sbale each */ | |
1329 | sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; | |
1330 | sbale[2].addr = zfcp_sg_to_address(&els->req[0]); | |
1331 | sbale[2].length = els->req[0].length; | |
1332 | sbale[3].addr = zfcp_sg_to_address(&els->resp[0]); | |
1333 | sbale[3].length = els->resp[0].length; | |
1334 | sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; | |
aef4a983 | 1335 | } else if (adapter->adapter_features & |
1da177e4 LT |
1336 | FSF_FEATURE_ELS_CT_CHAINED_SBALS) { |
1337 | /* try to use chained SBALs */ | |
1338 | bytes = zfcp_qdio_sbals_from_sg(fsf_req, | |
1339 | SBAL_FLAGS0_TYPE_WRITE_READ, | |
00bab910 | 1340 | els->req, |
1da177e4 LT |
1341 | ZFCP_MAX_SBALS_PER_ELS_REQ); |
1342 | if (bytes <= 0) { | |
1da177e4 LT |
1343 | if (bytes == 0) { |
1344 | ret = -ENOMEM; | |
1345 | } else { | |
1346 | ret = bytes; | |
1347 | } | |
1348 | goto failed_send; | |
1349 | } | |
1350 | fsf_req->qtcb->bottom.support.req_buf_length = bytes; | |
1351 | fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; | |
1352 | bytes = zfcp_qdio_sbals_from_sg(fsf_req, | |
1353 | SBAL_FLAGS0_TYPE_WRITE_READ, | |
00bab910 | 1354 | els->resp, |
1da177e4 LT |
1355 | ZFCP_MAX_SBALS_PER_ELS_REQ); |
1356 | if (bytes <= 0) { | |
1da177e4 LT |
1357 | if (bytes == 0) { |
1358 | ret = -ENOMEM; | |
1359 | } else { | |
1360 | ret = bytes; | |
1361 | } | |
1362 | goto failed_send; | |
1363 | } | |
1364 | fsf_req->qtcb->bottom.support.resp_buf_length = bytes; | |
1365 | } else { | |
1366 | /* reject request */ | |
1da177e4 LT |
1367 | ret = -EOPNOTSUPP; |
1368 | goto failed_send; | |
1369 | } | |
1370 | ||
1371 | /* settings in QTCB */ | |
1372 | fsf_req->qtcb->bottom.support.d_id = d_id; | |
06506d00 AH |
1373 | fsf_req->qtcb->bottom.support.service_class = |
1374 | ZFCP_FC_SERVICE_CLASS_DEFAULT; | |
1da177e4 | 1375 | fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT; |
059c97d0 | 1376 | fsf_req->data = (unsigned long) els; |
1da177e4 | 1377 | |
00bab910 | 1378 | sbale = zfcp_qdio_sbale_req(fsf_req); |
1da177e4 | 1379 | |
8a36e453 MS |
1380 | zfcp_san_dbf_event_els_request(fsf_req); |
1381 | ||
2abbe866 AH |
1382 | zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); |
1383 | ret = zfcp_fsf_req_send(fsf_req); | |
553448f6 | 1384 | if (ret) |
1da177e4 | 1385 | goto failed_send; |
1da177e4 | 1386 | |
1da177e4 LT |
1387 | goto out; |
1388 | ||
3f0ca62a | 1389 | port_blocked: |
1da177e4 LT |
1390 | failed_send: |
1391 | zfcp_fsf_req_free(fsf_req); | |
1392 | ||
1393 | failed_req: | |
1394 | out: | |
00bab910 | 1395 | write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); |
1da177e4 LT |
1396 | |
1397 | return ret; | |
1398 | } | |
1399 | ||
1400 | /** | |
1401 | * zfcp_fsf_send_els_handler - handler for ELS commands | |
1402 | * @fsf_req: pointer to struct zfcp_fsf_req | |
1403 | * | |
059c97d0 AH |
1404 | * Data specific for the ELS command is passed using |
1405 | * fsf_req->data. There we find the pointer to struct zfcp_send_els. | |
1406 | * Usually a specific handler for the ELS command is called which is | |
1407 | * found in this structure. | |
1da177e4 LT |
1408 | */ |
1409 | static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req) | |
1410 | { | |
1411 | struct zfcp_adapter *adapter; | |
1da177e4 | 1412 | struct zfcp_port *port; |
13e1e1f0 | 1413 | u32 d_id; |
1da177e4 LT |
1414 | struct fsf_qtcb_header *header; |
1415 | struct fsf_qtcb_bottom_support *bottom; | |
1416 | struct zfcp_send_els *send_els; | |
1417 | int retval = -EINVAL; | |
1da177e4 | 1418 | |
059c97d0 | 1419 | send_els = (struct zfcp_send_els *) fsf_req->data; |
1da177e4 | 1420 | adapter = send_els->adapter; |
64b29a13 | 1421 | port = send_els->port; |
1da177e4 LT |
1422 | d_id = send_els->d_id; |
1423 | header = &fsf_req->qtcb->header; | |
1424 | bottom = &fsf_req->qtcb->bottom.support; | |
1425 | ||
1426 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) | |
1427 | goto skip_fsfstatus; | |
1428 | ||
1429 | switch (header->fsf_status) { | |
1430 | ||
1431 | case FSF_GOOD: | |
8a36e453 | 1432 | zfcp_san_dbf_event_els_response(fsf_req); |
1da177e4 LT |
1433 | retval = 0; |
1434 | break; | |
1435 | ||
1436 | case FSF_SERVICE_CLASS_NOT_SUPPORTED: | |
553448f6 | 1437 | zfcp_fsf_class_not_supp(fsf_req); |
1da177e4 LT |
1438 | break; |
1439 | ||
1440 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
1441 | switch (header->fsf_status_qual.word[0]){ |
1442 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
64b29a13 AH |
1443 | if (port && (send_els->ls_code != ZFCP_LS_ADISC)) |
1444 | zfcp_test_link(port); | |
1da177e4 LT |
1445 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1446 | break; | |
1447 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
1da177e4 | 1448 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1da177e4 LT |
1449 | break; |
1450 | case FSF_SQ_RETRY_IF_POSSIBLE: | |
1da177e4 LT |
1451 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1452 | break; | |
1da177e4 LT |
1453 | } |
1454 | break; | |
1455 | ||
1456 | case FSF_ELS_COMMAND_REJECTED: | |
1da177e4 | 1457 | case FSF_PAYLOAD_SIZE_MISMATCH: |
1da177e4 | 1458 | case FSF_REQUEST_SIZE_TOO_LARGE: |
1da177e4 | 1459 | case FSF_RESPONSE_SIZE_TOO_LARGE: |
1da177e4 LT |
1460 | break; |
1461 | ||
1462 | case FSF_SBAL_MISMATCH: | |
1463 | /* should never occure, avoided in zfcp_fsf_send_els */ | |
1da177e4 LT |
1464 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1465 | break; | |
1466 | ||
1467 | case FSF_ACCESS_DENIED: | |
553448f6 | 1468 | zfcp_fsf_access_denied_port(fsf_req, port); |
1da177e4 LT |
1469 | break; |
1470 | ||
1471 | default: | |
1da177e4 LT |
1472 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1473 | break; | |
1474 | } | |
1475 | ||
1476 | skip_fsfstatus: | |
1477 | send_els->status = retval; | |
1478 | ||
aa551daf | 1479 | if (send_els->handler) |
1da177e4 LT |
1480 | send_els->handler(send_els->handler_data); |
1481 | ||
1482 | return retval; | |
1483 | } | |
1484 | ||
1da177e4 LT |
1485 | int |
1486 | zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) | |
1487 | { | |
1488 | volatile struct qdio_buffer_element *sbale; | |
2abbe866 | 1489 | struct zfcp_fsf_req *fsf_req; |
52ef11a7 | 1490 | struct zfcp_adapter *adapter = erp_action->adapter; |
1da177e4 | 1491 | unsigned long lock_flags; |
52ef11a7 | 1492 | int retval; |
1da177e4 LT |
1493 | |
1494 | /* setup new FSF request */ | |
52ef11a7 | 1495 | retval = zfcp_fsf_req_create(adapter, |
1da177e4 LT |
1496 | FSF_QTCB_EXCHANGE_CONFIG_DATA, |
1497 | ZFCP_REQ_AUTO_CLEANUP, | |
52ef11a7 | 1498 | adapter->pool.fsf_req_erp, |
2abbe866 | 1499 | &lock_flags, &fsf_req); |
52ef11a7 | 1500 | if (retval) { |
00bab910 | 1501 | write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); |
52ef11a7 | 1502 | return retval; |
1da177e4 LT |
1503 | } |
1504 | ||
00bab910 | 1505 | sbale = zfcp_qdio_sbale_req(fsf_req); |
52ef11a7 SS |
1506 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
1507 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
1da177e4 | 1508 | |
2abbe866 | 1509 | fsf_req->qtcb->bottom.config.feature_selection = |
aef4a983 MS |
1510 | FSF_FEATURE_CFDC | |
1511 | FSF_FEATURE_LUN_SHARING | | |
9eb69aff | 1512 | FSF_FEATURE_NOTIFICATION_LOST | |
aef4a983 | 1513 | FSF_FEATURE_UPDATE_ALERT; |
2abbe866 AH |
1514 | fsf_req->erp_action = erp_action; |
1515 | erp_action->fsf_req = fsf_req; | |
1da177e4 | 1516 | |
2abbe866 AH |
1517 | zfcp_erp_start_timer(fsf_req); |
1518 | retval = zfcp_fsf_req_send(fsf_req); | |
00bab910 | 1519 | write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); |
1da177e4 | 1520 | if (retval) { |
2abbe866 | 1521 | zfcp_fsf_req_free(fsf_req); |
1da177e4 | 1522 | erp_action->fsf_req = NULL; |
1da177e4 LT |
1523 | } |
1524 | ||
52ef11a7 SS |
1525 | return retval; |
1526 | } | |
1da177e4 | 1527 | |
52ef11a7 SS |
1528 | int |
1529 | zfcp_fsf_exchange_config_data_sync(struct zfcp_adapter *adapter, | |
1530 | struct fsf_qtcb_bottom_config *data) | |
1531 | { | |
1532 | volatile struct qdio_buffer_element *sbale; | |
1533 | struct zfcp_fsf_req *fsf_req; | |
1534 | unsigned long lock_flags; | |
1535 | int retval; | |
1536 | ||
1537 | /* setup new FSF request */ | |
1538 | retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_CONFIG_DATA, | |
aee6ef18 SS |
1539 | ZFCP_WAIT_FOR_SBAL, NULL, &lock_flags, |
1540 | &fsf_req); | |
52ef11a7 | 1541 | if (retval) { |
00bab910 | 1542 | write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); |
52ef11a7 SS |
1543 | return retval; |
1544 | } | |
1545 | ||
00bab910 | 1546 | sbale = zfcp_qdio_sbale_req(fsf_req); |
52ef11a7 SS |
1547 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
1548 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
1549 | ||
1550 | fsf_req->qtcb->bottom.config.feature_selection = | |
1551 | FSF_FEATURE_CFDC | | |
1552 | FSF_FEATURE_LUN_SHARING | | |
1553 | FSF_FEATURE_NOTIFICATION_LOST | | |
1554 | FSF_FEATURE_UPDATE_ALERT; | |
1555 | ||
1556 | if (data) | |
1557 | fsf_req->data = (unsigned long) data; | |
1558 | ||
1559 | zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); | |
1560 | retval = zfcp_fsf_req_send(fsf_req); | |
00bab910 | 1561 | write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); |
553448f6 | 1562 | if (!retval) |
52ef11a7 SS |
1563 | wait_event(fsf_req->completion_wq, |
1564 | fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); | |
1565 | ||
1566 | zfcp_fsf_req_free(fsf_req); | |
1567 | ||
1da177e4 LT |
1568 | return retval; |
1569 | } | |
1570 | ||
1571 | /** | |
1572 | * zfcp_fsf_exchange_config_evaluate | |
1573 | * @fsf_req: fsf_req which belongs to xchg config data request | |
1574 | * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1) | |
1575 | * | |
1576 | * returns: -EIO on error, 0 otherwise | |
1577 | */ | |
1578 | static int | |
1579 | zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok) | |
1580 | { | |
1581 | struct fsf_qtcb_bottom_config *bottom; | |
1582 | struct zfcp_adapter *adapter = fsf_req->adapter; | |
13e1e1f0 | 1583 | struct Scsi_Host *shost = adapter->scsi_host; |
1da177e4 LT |
1584 | |
1585 | bottom = &fsf_req->qtcb->bottom.config; | |
1da177e4 | 1586 | adapter->fsf_lic_version = bottom->lic_version; |
aef4a983 MS |
1587 | adapter->adapter_features = bottom->adapter_features; |
1588 | adapter->connection_features = bottom->connection_features; | |
6f71d9bc | 1589 | adapter->peer_wwpn = 0; |
1590 | adapter->peer_wwnn = 0; | |
1591 | adapter->peer_d_id = 0; | |
1da177e4 LT |
1592 | |
1593 | if (xchg_ok) { | |
52ef11a7 SS |
1594 | |
1595 | if (fsf_req->data) | |
1596 | memcpy((struct fsf_qtcb_bottom_config *) fsf_req->data, | |
1597 | bottom, sizeof (struct fsf_qtcb_bottom_config)); | |
1598 | ||
13e1e1f0 AH |
1599 | fc_host_node_name(shost) = bottom->nport_serv_param.wwnn; |
1600 | fc_host_port_name(shost) = bottom->nport_serv_param.wwpn; | |
1601 | fc_host_port_id(shost) = bottom->s_id & ZFCP_DID_MASK; | |
1602 | fc_host_speed(shost) = bottom->fc_link_speed; | |
52ef11a7 SS |
1603 | fc_host_supported_classes(shost) = |
1604 | FC_COS_CLASS2 | FC_COS_CLASS3; | |
1da177e4 | 1605 | adapter->hydra_version = bottom->adapter_type; |
c9615858 | 1606 | adapter->timer_ticks = bottom->timer_interval; |
ad757cdf AH |
1607 | if (fc_host_permanent_port_name(shost) == -1) |
1608 | fc_host_permanent_port_name(shost) = | |
1609 | fc_host_port_name(shost); | |
1610 | if (bottom->fc_topology == FSF_TOPO_P2P) { | |
1611 | adapter->peer_d_id = bottom->peer_d_id & ZFCP_DID_MASK; | |
1612 | adapter->peer_wwpn = bottom->plogi_payload.wwpn; | |
1613 | adapter->peer_wwnn = bottom->plogi_payload.wwnn; | |
1614 | fc_host_port_type(shost) = FC_PORTTYPE_PTP; | |
1615 | } else if (bottom->fc_topology == FSF_TOPO_FABRIC) | |
1616 | fc_host_port_type(shost) = FC_PORTTYPE_NPORT; | |
1617 | else if (bottom->fc_topology == FSF_TOPO_AL) | |
1618 | fc_host_port_type(shost) = FC_PORTTYPE_NLPORT; | |
1619 | else | |
1620 | fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; | |
1da177e4 | 1621 | } else { |
13e1e1f0 AH |
1622 | fc_host_node_name(shost) = 0; |
1623 | fc_host_port_name(shost) = 0; | |
1624 | fc_host_port_id(shost) = 0; | |
1625 | fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; | |
ad757cdf | 1626 | fc_host_port_type(shost) = FC_PORTTYPE_UNKNOWN; |
1da177e4 LT |
1627 | adapter->hydra_version = 0; |
1628 | } | |
1629 | ||
aef4a983 | 1630 | if (adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT) { |
1da177e4 | 1631 | adapter->hardware_version = bottom->hardware_version; |
13e1e1f0 AH |
1632 | memcpy(fc_host_serial_number(shost), bottom->serial_number, |
1633 | min(FC_SERIAL_NUMBER_SIZE, 17)); | |
1634 | EBCASC(fc_host_serial_number(shost), | |
1635 | min(FC_SERIAL_NUMBER_SIZE, 17)); | |
1da177e4 LT |
1636 | } |
1637 | ||
1da177e4 | 1638 | if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) { |
553448f6 CS |
1639 | dev_err(&adapter->ccw_device->dev, |
1640 | "The adapter only supports newer control block " | |
1641 | "versions, try updated device driver.\n"); | |
1f6f7129 | 1642 | zfcp_erp_adapter_shutdown(adapter, 0, 125, fsf_req); |
1da177e4 LT |
1643 | return -EIO; |
1644 | } | |
1645 | if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) { | |
553448f6 CS |
1646 | dev_err(&adapter->ccw_device->dev, |
1647 | "The adapter only supports older control block " | |
1648 | "versions, consider a microcode upgrade.\n"); | |
1f6f7129 | 1649 | zfcp_erp_adapter_shutdown(adapter, 0, 126, fsf_req); |
1da177e4 LT |
1650 | return -EIO; |
1651 | } | |
1652 | return 0; | |
1653 | } | |
1654 | ||
52ef11a7 | 1655 | /** |
1da177e4 LT |
1656 | * function: zfcp_fsf_exchange_config_data_handler |
1657 | * | |
1658 | * purpose: is called for finished Exchange Configuration Data command | |
1659 | * | |
1660 | * returns: | |
1661 | */ | |
1662 | static int | |
1663 | zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req) | |
1664 | { | |
1665 | struct fsf_qtcb_bottom_config *bottom; | |
1666 | struct zfcp_adapter *adapter = fsf_req->adapter; | |
aef4a983 | 1667 | struct fsf_qtcb *qtcb = fsf_req->qtcb; |
1da177e4 LT |
1668 | |
1669 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) | |
1670 | return -EIO; | |
1671 | ||
aef4a983 | 1672 | switch (qtcb->header.fsf_status) { |
1da177e4 LT |
1673 | |
1674 | case FSF_GOOD: | |
1da177e4 LT |
1675 | if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1)) |
1676 | return -EIO; | |
1677 | ||
ad757cdf AH |
1678 | switch (fc_host_port_type(adapter->scsi_host)) { |
1679 | case FC_PORTTYPE_PTP: | |
553448f6 CS |
1680 | if (fsf_req->erp_action) |
1681 | dev_info(&adapter->ccw_device->dev, | |
1682 | "Point-to-Point fibrechannel " | |
1683 | "configuration detected.\n"); | |
6f71d9bc | 1684 | break; |
ad757cdf | 1685 | case FC_PORTTYPE_NLPORT: |
553448f6 CS |
1686 | dev_err(&adapter->ccw_device->dev, |
1687 | "Unsupported arbitrated loop fibrechannel " | |
1688 | "topology detected, shutting down adapter\n"); | |
1f6f7129 | 1689 | zfcp_erp_adapter_shutdown(adapter, 0, 127, fsf_req); |
1da177e4 | 1690 | return -EIO; |
ad757cdf | 1691 | case FC_PORTTYPE_NPORT: |
ec258fe4 | 1692 | if (fsf_req->erp_action) |
553448f6 CS |
1693 | dev_info(&adapter->ccw_device->dev, |
1694 | "Switched fabric fibrechannel " | |
1695 | "network detected.\n"); | |
1da177e4 LT |
1696 | break; |
1697 | default: | |
553448f6 CS |
1698 | dev_err(&adapter->ccw_device->dev, |
1699 | "The fibrechannel topology reported by the " | |
1700 | "adapter is not known by the zfcp driver, " | |
1701 | "shutting down adapter.\n"); | |
1f6f7129 | 1702 | zfcp_erp_adapter_shutdown(adapter, 0, 128, fsf_req); |
1da177e4 LT |
1703 | return -EIO; |
1704 | } | |
aef4a983 | 1705 | bottom = &qtcb->bottom.config; |
1da177e4 | 1706 | if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) { |
553448f6 CS |
1707 | dev_err(&adapter->ccw_device->dev, |
1708 | "Maximum QTCB size (%d bytes) allowed by " | |
1709 | "the adapter is lower than the minimum " | |
1710 | "required by the driver (%ld bytes).\n", | |
1711 | bottom->max_qtcb_size, sizeof(struct fsf_qtcb)); | |
1f6f7129 | 1712 | zfcp_erp_adapter_shutdown(adapter, 0, 129, fsf_req); |
1da177e4 LT |
1713 | return -EIO; |
1714 | } | |
1715 | atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, | |
1716 | &adapter->status); | |
1717 | break; | |
1718 | case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: | |
1da177e4 LT |
1719 | if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0)) |
1720 | return -EIO; | |
1721 | ||
52ef11a7 SS |
1722 | atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK, |
1723 | &adapter->status); | |
aef4a983 | 1724 | |
698ec016 | 1725 | zfcp_fsf_link_down_info_eval(fsf_req, 42, |
aef4a983 | 1726 | &qtcb->header.fsf_status_qual.link_down_info); |
1da177e4 LT |
1727 | break; |
1728 | default: | |
1f6f7129 | 1729 | zfcp_erp_adapter_shutdown(adapter, 0, 130, fsf_req); |
1da177e4 LT |
1730 | return -EIO; |
1731 | } | |
1732 | return 0; | |
1733 | } | |
1734 | ||
1735 | /** | |
1736 | * zfcp_fsf_exchange_port_data - request information about local port | |
aef4a983 | 1737 | * @erp_action: ERP action for the adapter for which port data is requested |
1da177e4 LT |
1738 | */ |
1739 | int | |
52ef11a7 | 1740 | zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) |
1da177e4 LT |
1741 | { |
1742 | volatile struct qdio_buffer_element *sbale; | |
52ef11a7 SS |
1743 | struct zfcp_fsf_req *fsf_req; |
1744 | struct zfcp_adapter *adapter = erp_action->adapter; | |
2abbe866 | 1745 | unsigned long lock_flags; |
52ef11a7 | 1746 | int retval; |
1da177e4 | 1747 | |
553448f6 | 1748 | if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) |
52ef11a7 | 1749 | return -EOPNOTSUPP; |
1da177e4 | 1750 | |
1da177e4 LT |
1751 | /* setup new FSF request */ |
1752 | retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, | |
52ef11a7 SS |
1753 | ZFCP_REQ_AUTO_CLEANUP, |
1754 | adapter->pool.fsf_req_erp, | |
1755 | &lock_flags, &fsf_req); | |
1756 | if (retval) { | |
00bab910 | 1757 | write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); |
2448c459 | 1758 | return retval; |
aef4a983 MS |
1759 | } |
1760 | ||
00bab910 | 1761 | sbale = zfcp_qdio_sbale_req(fsf_req); |
52ef11a7 SS |
1762 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
1763 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
1da177e4 | 1764 | |
52ef11a7 SS |
1765 | erp_action->fsf_req = fsf_req; |
1766 | fsf_req->erp_action = erp_action; | |
1767 | zfcp_erp_start_timer(fsf_req); | |
1da177e4 | 1768 | |
2abbe866 | 1769 | retval = zfcp_fsf_req_send(fsf_req); |
00bab910 | 1770 | write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); |
52ef11a7 | 1771 | |
1da177e4 | 1772 | if (retval) { |
1da177e4 | 1773 | zfcp_fsf_req_free(fsf_req); |
52ef11a7 SS |
1774 | erp_action->fsf_req = NULL; |
1775 | } | |
52ef11a7 SS |
1776 | return retval; |
1777 | } | |
1778 | ||
1779 | ||
1780 | /** | |
1781 | * zfcp_fsf_exchange_port_data_sync - request information about local port | |
1782 | * and wait until information is ready | |
1783 | */ | |
1784 | int | |
1785 | zfcp_fsf_exchange_port_data_sync(struct zfcp_adapter *adapter, | |
1786 | struct fsf_qtcb_bottom_port *data) | |
1787 | { | |
1788 | volatile struct qdio_buffer_element *sbale; | |
1789 | struct zfcp_fsf_req *fsf_req; | |
1790 | unsigned long lock_flags; | |
1791 | int retval; | |
1792 | ||
553448f6 | 1793 | if (!(adapter->adapter_features & FSF_FEATURE_HBAAPI_MANAGEMENT)) |
52ef11a7 | 1794 | return -EOPNOTSUPP; |
52ef11a7 SS |
1795 | |
1796 | /* setup new FSF request */ | |
1797 | retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA, | |
1798 | 0, NULL, &lock_flags, &fsf_req); | |
1799 | if (retval) { | |
00bab910 | 1800 | write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); |
2448c459 | 1801 | return retval; |
1da177e4 LT |
1802 | } |
1803 | ||
52ef11a7 SS |
1804 | if (data) |
1805 | fsf_req->data = (unsigned long) data; | |
1806 | ||
00bab910 | 1807 | sbale = zfcp_qdio_sbale_req(fsf_req); |
52ef11a7 SS |
1808 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
1809 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
1810 | ||
1811 | zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); | |
1812 | retval = zfcp_fsf_req_send(fsf_req); | |
00bab910 | 1813 | write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); |
1da177e4 | 1814 | |
553448f6 | 1815 | if (!retval) |
2448c459 AH |
1816 | wait_event(fsf_req->completion_wq, |
1817 | fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); | |
52ef11a7 SS |
1818 | |
1819 | zfcp_fsf_req_free(fsf_req); | |
1820 | ||
1da177e4 LT |
1821 | return retval; |
1822 | } | |
1823 | ||
2f8f3ed5 AH |
1824 | /** |
1825 | * zfcp_fsf_exchange_port_evaluate | |
1826 | * @fsf_req: fsf_req which belongs to xchg port data request | |
1827 | * @xchg_ok: specifies if xchg port data was incomplete or complete (0/1) | |
1828 | */ | |
1829 | static void | |
1830 | zfcp_fsf_exchange_port_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok) | |
1831 | { | |
1832 | struct zfcp_adapter *adapter; | |
52ef11a7 | 1833 | struct fsf_qtcb_bottom_port *bottom; |
2f8f3ed5 AH |
1834 | struct Scsi_Host *shost; |
1835 | ||
1836 | adapter = fsf_req->adapter; | |
52ef11a7 | 1837 | bottom = &fsf_req->qtcb->bottom.port; |
2f8f3ed5 AH |
1838 | shost = adapter->scsi_host; |
1839 | ||
52ef11a7 SS |
1840 | if (fsf_req->data) |
1841 | memcpy((struct fsf_qtcb_bottom_port*) fsf_req->data, bottom, | |
1842 | sizeof(struct fsf_qtcb_bottom_port)); | |
2f8f3ed5 AH |
1843 | |
1844 | if (adapter->connection_features & FSF_FEATURE_NPIV_MODE) | |
1845 | fc_host_permanent_port_name(shost) = bottom->wwpn; | |
1846 | else | |
1847 | fc_host_permanent_port_name(shost) = fc_host_port_name(shost); | |
1848 | fc_host_maxframe_size(shost) = bottom->maximum_frame_size; | |
1849 | fc_host_supported_speeds(shost) = bottom->supported_speed; | |
1850 | } | |
1da177e4 LT |
1851 | |
1852 | /** | |
1853 | * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request | |
1854 | * @fsf_req: pointer to struct zfcp_fsf_req | |
1855 | */ | |
1856 | static void | |
1857 | zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req) | |
1858 | { | |
2f8f3ed5 AH |
1859 | struct zfcp_adapter *adapter; |
1860 | struct fsf_qtcb *qtcb; | |
1861 | ||
1862 | adapter = fsf_req->adapter; | |
1863 | qtcb = fsf_req->qtcb; | |
1da177e4 LT |
1864 | |
1865 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) | |
1866 | return; | |
1867 | ||
aef4a983 | 1868 | switch (qtcb->header.fsf_status) { |
1da177e4 | 1869 | case FSF_GOOD: |
2f8f3ed5 | 1870 | zfcp_fsf_exchange_port_evaluate(fsf_req, 1); |
aef4a983 | 1871 | atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); |
aef4a983 | 1872 | break; |
aef4a983 | 1873 | case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE: |
2f8f3ed5 | 1874 | zfcp_fsf_exchange_port_evaluate(fsf_req, 0); |
aef4a983 | 1875 | atomic_set_mask(ZFCP_STATUS_ADAPTER_XPORT_OK, &adapter->status); |
698ec016 | 1876 | zfcp_fsf_link_down_info_eval(fsf_req, 43, |
aef4a983 | 1877 | &qtcb->header.fsf_status_qual.link_down_info); |
1da177e4 | 1878 | break; |
1da177e4 LT |
1879 | } |
1880 | } | |
1881 | ||
1882 | ||
1883 | /* | |
1884 | * function: zfcp_fsf_open_port | |
1885 | * | |
41fa2ada | 1886 | * purpose: |
1da177e4 LT |
1887 | * |
1888 | * returns: address of initiated FSF request | |
41fa2ada | 1889 | * NULL - request could not be initiated |
1da177e4 LT |
1890 | */ |
1891 | int | |
1892 | zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) | |
1893 | { | |
1894 | volatile struct qdio_buffer_element *sbale; | |
2abbe866 | 1895 | struct zfcp_fsf_req *fsf_req; |
1da177e4 LT |
1896 | unsigned long lock_flags; |
1897 | int retval = 0; | |
1898 | ||
1899 | /* setup new FSF request */ | |
1900 | retval = zfcp_fsf_req_create(erp_action->adapter, | |
1901 | FSF_QTCB_OPEN_PORT_WITH_DID, | |
1902 | ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, | |
1903 | erp_action->adapter->pool.fsf_req_erp, | |
2abbe866 | 1904 | &lock_flags, &fsf_req); |
553448f6 | 1905 | if (retval < 0) |
1da177e4 | 1906 | goto out; |
1da177e4 | 1907 | |
00bab910 | 1908 | sbale = zfcp_qdio_sbale_req(fsf_req); |
1da177e4 LT |
1909 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
1910 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
1911 | ||
2abbe866 | 1912 | fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id; |
1da177e4 | 1913 | atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status); |
2abbe866 AH |
1914 | fsf_req->data = (unsigned long) erp_action->port; |
1915 | fsf_req->erp_action = erp_action; | |
1916 | erp_action->fsf_req = fsf_req; | |
1da177e4 | 1917 | |
2abbe866 AH |
1918 | zfcp_erp_start_timer(fsf_req); |
1919 | retval = zfcp_fsf_req_send(fsf_req); | |
1da177e4 | 1920 | if (retval) { |
2abbe866 | 1921 | zfcp_fsf_req_free(fsf_req); |
1da177e4 LT |
1922 | erp_action->fsf_req = NULL; |
1923 | goto out; | |
1924 | } | |
1925 | ||
1da177e4 | 1926 | out: |
00bab910 | 1927 | write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags); |
1da177e4 LT |
1928 | return retval; |
1929 | } | |
1930 | ||
1931 | /* | |
1932 | * function: zfcp_fsf_open_port_handler | |
1933 | * | |
1934 | * purpose: is called for finished Open Port command | |
1935 | * | |
41fa2ada | 1936 | * returns: |
1da177e4 LT |
1937 | */ |
1938 | static int | |
1939 | zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req) | |
1940 | { | |
1941 | int retval = -EINVAL; | |
1942 | struct zfcp_port *port; | |
1943 | struct fsf_plogi *plogi; | |
1944 | struct fsf_qtcb_header *header; | |
1da177e4 | 1945 | |
059c97d0 | 1946 | port = (struct zfcp_port *) fsf_req->data; |
1da177e4 LT |
1947 | header = &fsf_req->qtcb->header; |
1948 | ||
1949 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { | |
1950 | /* don't change port status in our bookkeeping */ | |
1951 | goto skip_fsfstatus; | |
1952 | } | |
1953 | ||
1954 | /* evaluate FSF status in QTCB */ | |
1955 | switch (header->fsf_status) { | |
1956 | ||
1957 | case FSF_PORT_ALREADY_OPEN: | |
1da177e4 LT |
1958 | /* |
1959 | * This is a bug, however operation should continue normally | |
1960 | * if it is simply ignored | |
1961 | */ | |
1962 | break; | |
1963 | ||
1964 | case FSF_ACCESS_DENIED: | |
553448f6 | 1965 | zfcp_fsf_access_denied_port(fsf_req, port); |
1da177e4 LT |
1966 | break; |
1967 | ||
1968 | case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED: | |
553448f6 CS |
1969 | dev_warn(&fsf_req->adapter->ccw_device->dev, |
1970 | "The adapter is out of resources. The remote port " | |
1971 | "0x%016Lx could not be opened, disabling it.\n", | |
1972 | port->wwpn); | |
1f6f7129 | 1973 | zfcp_erp_port_failed(port, 31, fsf_req); |
1da177e4 LT |
1974 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1975 | break; | |
1976 | ||
1977 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
1978 | switch (header->fsf_status_qual.word[0]) { |
1979 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
1da177e4 LT |
1980 | /* ERP strategy will escalate */ |
1981 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
1982 | break; | |
1983 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
1984 | /* ERP strategy will escalate */ | |
1da177e4 LT |
1985 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1986 | break; | |
1987 | case FSF_SQ_NO_RETRY_POSSIBLE: | |
553448f6 CS |
1988 | dev_warn(&fsf_req->adapter->ccw_device->dev, |
1989 | "The remote port 0x%016Lx could not be " | |
1990 | "opened. Disabling it.\n", port->wwpn); | |
1f6f7129 | 1991 | zfcp_erp_port_failed(port, 32, fsf_req); |
1da177e4 LT |
1992 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1993 | break; | |
1994 | default: | |
1da177e4 LT |
1995 | break; |
1996 | } | |
1997 | break; | |
1998 | ||
1999 | case FSF_GOOD: | |
1da177e4 LT |
2000 | /* save port handle assigned by FSF */ |
2001 | port->handle = header->port_handle; | |
1da177e4 LT |
2002 | /* mark port as open */ |
2003 | atomic_set_mask(ZFCP_STATUS_COMMON_OPEN | | |
2004 | ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); | |
d736a27b AH |
2005 | atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | |
2006 | ZFCP_STATUS_COMMON_ACCESS_BOXED, | |
2007 | &port->status); | |
1da177e4 LT |
2008 | retval = 0; |
2009 | /* check whether D_ID has changed during open */ | |
2010 | /* | |
2011 | * FIXME: This check is not airtight, as the FCP channel does | |
2012 | * not monitor closures of target port connections caused on | |
2013 | * the remote side. Thus, they might miss out on invalidating | |
2014 | * locally cached WWPNs (and other N_Port parameters) of gone | |
2015 | * target ports. So, our heroic attempt to make things safe | |
2016 | * could be undermined by 'open port' response data tagged with | |
2017 | * obsolete WWPNs. Another reason to monitor potential | |
2018 | * connection closures ourself at least (by interpreting | |
2019 | * incoming ELS' and unsolicited status). It just crosses my | |
2020 | * mind that one should be able to cross-check by means of | |
2021 | * another GID_PN straight after a port has been opened. | |
2022 | * Alternately, an ADISC/PDISC ELS should suffice, as well. | |
2023 | */ | |
2024 | plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els; | |
2025 | if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status)) | |
2026 | { | |
2027 | if (fsf_req->qtcb->bottom.support.els1_length < | |
75bfc283 | 2028 | sizeof (struct fsf_plogi)) { |
1da177e4 LT |
2029 | /* skip sanity check and assume wwpn is ok */ |
2030 | } else { | |
2031 | if (plogi->serv_param.wwpn != port->wwpn) { | |
1da177e4 LT |
2032 | atomic_clear_mask( |
2033 | ZFCP_STATUS_PORT_DID_DID, | |
2034 | &port->status); | |
75bfc283 | 2035 | } else { |
1da177e4 | 2036 | port->wwnn = plogi->serv_param.wwnn; |
24073b47 | 2037 | zfcp_fc_plogi_evaluate(port, plogi); |
75bfc283 | 2038 | } |
1da177e4 LT |
2039 | } |
2040 | } | |
2041 | break; | |
2042 | ||
2043 | case FSF_UNKNOWN_OP_SUBTYPE: | |
2044 | /* should never occure, subtype not set in zfcp_fsf_open_port */ | |
1da177e4 LT |
2045 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2046 | break; | |
2047 | ||
2048 | default: | |
1da177e4 LT |
2049 | break; |
2050 | } | |
2051 | ||
2052 | skip_fsfstatus: | |
2053 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status); | |
2054 | return retval; | |
2055 | } | |
2056 | ||
2057 | /* | |
2058 | * function: zfcp_fsf_close_port | |
2059 | * | |
2060 | * purpose: submit FSF command "close port" | |
2061 | * | |
2062 | * returns: address of initiated FSF request | |
2063 | * NULL - request could not be initiated | |
2064 | */ | |
2065 | int | |
2066 | zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) | |
2067 | { | |
2068 | volatile struct qdio_buffer_element *sbale; | |
2abbe866 | 2069 | struct zfcp_fsf_req *fsf_req; |
1da177e4 LT |
2070 | unsigned long lock_flags; |
2071 | int retval = 0; | |
2072 | ||
2073 | /* setup new FSF request */ | |
2074 | retval = zfcp_fsf_req_create(erp_action->adapter, | |
2075 | FSF_QTCB_CLOSE_PORT, | |
2076 | ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, | |
2077 | erp_action->adapter->pool.fsf_req_erp, | |
2abbe866 | 2078 | &lock_flags, &fsf_req); |
553448f6 | 2079 | if (retval < 0) |
1da177e4 | 2080 | goto out; |
1da177e4 | 2081 | |
00bab910 | 2082 | sbale = zfcp_qdio_sbale_req(fsf_req); |
1da177e4 LT |
2083 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
2084 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
2085 | ||
2086 | atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status); | |
2abbe866 AH |
2087 | fsf_req->data = (unsigned long) erp_action->port; |
2088 | fsf_req->erp_action = erp_action; | |
2089 | fsf_req->qtcb->header.port_handle = erp_action->port->handle; | |
2090 | fsf_req->erp_action = erp_action; | |
2091 | erp_action->fsf_req = fsf_req; | |
2092 | ||
2093 | zfcp_erp_start_timer(fsf_req); | |
2094 | retval = zfcp_fsf_req_send(fsf_req); | |
1da177e4 | 2095 | if (retval) { |
2abbe866 | 2096 | zfcp_fsf_req_free(fsf_req); |
1da177e4 LT |
2097 | erp_action->fsf_req = NULL; |
2098 | goto out; | |
2099 | } | |
2100 | ||
1da177e4 | 2101 | out: |
00bab910 | 2102 | write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags); |
1da177e4 LT |
2103 | return retval; |
2104 | } | |
2105 | ||
2106 | /* | |
2107 | * function: zfcp_fsf_close_port_handler | |
2108 | * | |
2109 | * purpose: is called for finished Close Port FSF command | |
2110 | * | |
2111 | * returns: | |
2112 | */ | |
2113 | static int | |
2114 | zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req) | |
2115 | { | |
2116 | int retval = -EINVAL; | |
2117 | struct zfcp_port *port; | |
2118 | ||
059c97d0 | 2119 | port = (struct zfcp_port *) fsf_req->data; |
1da177e4 LT |
2120 | |
2121 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { | |
2122 | /* don't change port status in our bookkeeping */ | |
2123 | goto skip_fsfstatus; | |
2124 | } | |
2125 | ||
2126 | /* evaluate FSF status in QTCB */ | |
2127 | switch (fsf_req->qtcb->header.fsf_status) { | |
2128 | ||
2129 | case FSF_PORT_HANDLE_NOT_VALID: | |
1f6f7129 | 2130 | zfcp_erp_adapter_reopen(port->adapter, 0, 107, fsf_req); |
1da177e4 LT |
2131 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2132 | break; | |
2133 | ||
2134 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
2135 | /* Note: FSF has actually closed the port in this case. |
2136 | * The status code is just daft. Fingers crossed for a change | |
2137 | */ | |
2138 | retval = 0; | |
2139 | break; | |
2140 | ||
2141 | case FSF_GOOD: | |
1f6f7129 | 2142 | zfcp_erp_modify_port_status(port, 33, fsf_req, |
1da177e4 LT |
2143 | ZFCP_STATUS_COMMON_OPEN, |
2144 | ZFCP_CLEAR); | |
2145 | retval = 0; | |
2146 | break; | |
1da177e4 LT |
2147 | } |
2148 | ||
2149 | skip_fsfstatus: | |
2150 | atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status); | |
2151 | return retval; | |
2152 | } | |
2153 | ||
2154 | /* | |
2155 | * function: zfcp_fsf_close_physical_port | |
2156 | * | |
2157 | * purpose: submit FSF command "close physical port" | |
2158 | * | |
2159 | * returns: address of initiated FSF request | |
2160 | * NULL - request could not be initiated | |
2161 | */ | |
2162 | int | |
2163 | zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) | |
2164 | { | |
1da177e4 | 2165 | volatile struct qdio_buffer_element *sbale; |
2abbe866 AH |
2166 | struct zfcp_fsf_req *fsf_req; |
2167 | unsigned long lock_flags; | |
2168 | int retval = 0; | |
1da177e4 LT |
2169 | |
2170 | /* setup new FSF request */ | |
2171 | retval = zfcp_fsf_req_create(erp_action->adapter, | |
2172 | FSF_QTCB_CLOSE_PHYSICAL_PORT, | |
2173 | ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, | |
2174 | erp_action->adapter->pool.fsf_req_erp, | |
2abbe866 | 2175 | &lock_flags, &fsf_req); |
553448f6 | 2176 | if (retval < 0) |
1da177e4 | 2177 | goto out; |
1da177e4 | 2178 | |
00bab910 | 2179 | sbale = zfcp_qdio_sbale_req(fsf_req); |
1da177e4 LT |
2180 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
2181 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
2182 | ||
2183 | /* mark port as being closed */ | |
2184 | atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, | |
2185 | &erp_action->port->status); | |
2186 | /* save a pointer to this port */ | |
2abbe866 AH |
2187 | fsf_req->data = (unsigned long) erp_action->port; |
2188 | fsf_req->qtcb->header.port_handle = erp_action->port->handle; | |
2189 | fsf_req->erp_action = erp_action; | |
2190 | erp_action->fsf_req = fsf_req; | |
2191 | ||
2192 | zfcp_erp_start_timer(fsf_req); | |
2193 | retval = zfcp_fsf_req_send(fsf_req); | |
1da177e4 | 2194 | if (retval) { |
2abbe866 | 2195 | zfcp_fsf_req_free(fsf_req); |
1da177e4 LT |
2196 | erp_action->fsf_req = NULL; |
2197 | goto out; | |
2198 | } | |
2199 | ||
1da177e4 | 2200 | out: |
00bab910 | 2201 | write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags); |
1da177e4 LT |
2202 | return retval; |
2203 | } | |
2204 | ||
2205 | /* | |
2206 | * function: zfcp_fsf_close_physical_port_handler | |
2207 | * | |
2208 | * purpose: is called for finished Close Physical Port FSF command | |
2209 | * | |
2210 | * returns: | |
2211 | */ | |
2212 | static int | |
2213 | zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req) | |
2214 | { | |
2215 | int retval = -EINVAL; | |
2216 | struct zfcp_port *port; | |
2217 | struct zfcp_unit *unit; | |
2218 | struct fsf_qtcb_header *header; | |
1da177e4 | 2219 | |
059c97d0 | 2220 | port = (struct zfcp_port *) fsf_req->data; |
1da177e4 LT |
2221 | header = &fsf_req->qtcb->header; |
2222 | ||
2223 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { | |
2224 | /* don't change port status in our bookkeeping */ | |
2225 | goto skip_fsfstatus; | |
2226 | } | |
2227 | ||
2228 | /* evaluate FSF status in QTCB */ | |
2229 | switch (header->fsf_status) { | |
2230 | ||
2231 | case FSF_PORT_HANDLE_NOT_VALID: | |
1f6f7129 | 2232 | zfcp_erp_adapter_reopen(port->adapter, 0, 108, fsf_req); |
1da177e4 LT |
2233 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2234 | break; | |
2235 | ||
2236 | case FSF_ACCESS_DENIED: | |
553448f6 | 2237 | zfcp_fsf_access_denied_port(fsf_req, port); |
1da177e4 LT |
2238 | break; |
2239 | ||
2240 | case FSF_PORT_BOXED: | |
1f6f7129 | 2241 | zfcp_erp_port_boxed(port, 50, fsf_req); |
1da177e4 LT |
2242 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | |
2243 | ZFCP_STATUS_FSFREQ_RETRY; | |
5c815d15 CS |
2244 | |
2245 | /* can't use generic zfcp_erp_modify_port_status because | |
2246 | * ZFCP_STATUS_COMMON_OPEN must not be reset for the port */ | |
2247 | atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); | |
2248 | list_for_each_entry(unit, &port->unit_list_head, list) | |
2249 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, | |
2250 | &unit->status); | |
1da177e4 LT |
2251 | break; |
2252 | ||
2253 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
2254 | switch (header->fsf_status_qual.word[0]) { |
2255 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
1da177e4 LT |
2256 | /* This will now be escalated by ERP */ |
2257 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
2258 | break; | |
2259 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
1da177e4 | 2260 | /* ERP strategy will escalate */ |
1da177e4 LT |
2261 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2262 | break; | |
1da177e4 LT |
2263 | } |
2264 | break; | |
2265 | ||
2266 | case FSF_GOOD: | |
1da177e4 LT |
2267 | /* can't use generic zfcp_erp_modify_port_status because |
2268 | * ZFCP_STATUS_COMMON_OPEN must not be reset for the port | |
2269 | */ | |
2270 | atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status); | |
2271 | list_for_each_entry(unit, &port->unit_list_head, list) | |
2272 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); | |
2273 | retval = 0; | |
2274 | break; | |
1da177e4 LT |
2275 | } |
2276 | ||
2277 | skip_fsfstatus: | |
2278 | atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status); | |
2279 | return retval; | |
2280 | } | |
2281 | ||
2282 | /* | |
2283 | * function: zfcp_fsf_open_unit | |
2284 | * | |
2285 | * purpose: | |
2286 | * | |
2287 | * returns: | |
2288 | * | |
2289 | * assumptions: This routine does not check whether the associated | |
2290 | * remote port has already been opened. This should be | |
2291 | * done by calling routines. Otherwise some status | |
2292 | * may be presented by FSF | |
2293 | */ | |
2294 | int | |
2295 | zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) | |
2296 | { | |
2297 | volatile struct qdio_buffer_element *sbale; | |
2abbe866 | 2298 | struct zfcp_fsf_req *fsf_req; |
1da177e4 LT |
2299 | unsigned long lock_flags; |
2300 | int retval = 0; | |
2301 | ||
2302 | /* setup new FSF request */ | |
2303 | retval = zfcp_fsf_req_create(erp_action->adapter, | |
2304 | FSF_QTCB_OPEN_LUN, | |
2305 | ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, | |
2306 | erp_action->adapter->pool.fsf_req_erp, | |
2abbe866 | 2307 | &lock_flags, &fsf_req); |
553448f6 | 2308 | if (retval < 0) |
1da177e4 | 2309 | goto out; |
1da177e4 | 2310 | |
00bab910 | 2311 | sbale = zfcp_qdio_sbale_req(fsf_req); |
1da177e4 LT |
2312 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
2313 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
2314 | ||
2abbe866 AH |
2315 | fsf_req->qtcb->header.port_handle = erp_action->port->handle; |
2316 | fsf_req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun; | |
aef4a983 | 2317 | if (!(erp_action->adapter->connection_features & FSF_FEATURE_NPIV_MODE)) |
2abbe866 | 2318 | fsf_req->qtcb->bottom.support.option = |
06506d00 | 2319 | FSF_OPEN_LUN_SUPPRESS_BOXING; |
1da177e4 | 2320 | atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status); |
2abbe866 AH |
2321 | fsf_req->data = (unsigned long) erp_action->unit; |
2322 | fsf_req->erp_action = erp_action; | |
2323 | erp_action->fsf_req = fsf_req; | |
1da177e4 | 2324 | |
2abbe866 AH |
2325 | zfcp_erp_start_timer(fsf_req); |
2326 | retval = zfcp_fsf_req_send(erp_action->fsf_req); | |
1da177e4 | 2327 | if (retval) { |
2abbe866 | 2328 | zfcp_fsf_req_free(fsf_req); |
1da177e4 LT |
2329 | erp_action->fsf_req = NULL; |
2330 | goto out; | |
2331 | } | |
1da177e4 | 2332 | out: |
00bab910 | 2333 | write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags); |
1da177e4 LT |
2334 | return retval; |
2335 | } | |
2336 | ||
2337 | /* | |
2338 | * function: zfcp_fsf_open_unit_handler | |
2339 | * | |
2340 | * purpose: is called for finished Open LUN command | |
2341 | * | |
41fa2ada | 2342 | * returns: |
1da177e4 LT |
2343 | */ |
2344 | static int | |
2345 | zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req) | |
2346 | { | |
2347 | int retval = -EINVAL; | |
2348 | struct zfcp_adapter *adapter; | |
2349 | struct zfcp_unit *unit; | |
2350 | struct fsf_qtcb_header *header; | |
2351 | struct fsf_qtcb_bottom_support *bottom; | |
2352 | struct fsf_queue_designator *queue_designator; | |
aef4a983 | 2353 | int exclusive, readwrite; |
1da177e4 | 2354 | |
059c97d0 | 2355 | unit = (struct zfcp_unit *) fsf_req->data; |
1da177e4 LT |
2356 | |
2357 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { | |
2358 | /* don't change unit status in our bookkeeping */ | |
2359 | goto skip_fsfstatus; | |
2360 | } | |
2361 | ||
2362 | adapter = fsf_req->adapter; | |
2363 | header = &fsf_req->qtcb->header; | |
2364 | bottom = &fsf_req->qtcb->bottom.support; | |
2365 | queue_designator = &header->fsf_status_qual.fsf_queue_designator; | |
2366 | ||
1da177e4 | 2367 | atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED | |
b64ddf96 | 2368 | ZFCP_STATUS_COMMON_ACCESS_BOXED | |
1da177e4 LT |
2369 | ZFCP_STATUS_UNIT_SHARED | |
2370 | ZFCP_STATUS_UNIT_READONLY, | |
2371 | &unit->status); | |
2372 | ||
2373 | /* evaluate FSF status in QTCB */ | |
2374 | switch (header->fsf_status) { | |
2375 | ||
2376 | case FSF_PORT_HANDLE_NOT_VALID: | |
1f6f7129 | 2377 | zfcp_erp_adapter_reopen(unit->port->adapter, 0, 109, fsf_req); |
1da177e4 LT |
2378 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2379 | break; | |
2380 | ||
2381 | case FSF_LUN_ALREADY_OPEN: | |
1da177e4 LT |
2382 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2383 | break; | |
2384 | ||
2385 | case FSF_ACCESS_DENIED: | |
553448f6 | 2386 | zfcp_fsf_access_denied_unit(fsf_req, unit); |
1da177e4 | 2387 | atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); |
553448f6 | 2388 | atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); |
1da177e4 LT |
2389 | break; |
2390 | ||
2391 | case FSF_PORT_BOXED: | |
1f6f7129 | 2392 | zfcp_erp_port_boxed(unit->port, 51, fsf_req); |
1da177e4 LT |
2393 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | |
2394 | ZFCP_STATUS_FSFREQ_RETRY; | |
2395 | break; | |
2396 | ||
2397 | case FSF_LUN_SHARING_VIOLATION: | |
1da177e4 | 2398 | if (header->fsf_status_qual.word[0] != 0) { |
553448f6 CS |
2399 | dev_warn(&adapter->ccw_device->dev, |
2400 | "FCP-LUN 0x%Lx at the remote port " | |
2401 | "with WWPN 0x%Lx " | |
2402 | "connected to the adapter " | |
2403 | "is already in use in LPAR%d, CSS%d.\n", | |
2404 | unit->fcp_lun, | |
2405 | unit->port->wwpn, | |
2406 | queue_designator->hla, | |
2407 | queue_designator->cssid); | |
2408 | } else | |
2409 | zfcp_act_eval_err(adapter, | |
2410 | header->fsf_status_qual.word[2]); | |
1f6f7129 | 2411 | zfcp_erp_unit_access_denied(unit, 60, fsf_req); |
1da177e4 LT |
2412 | atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status); |
2413 | atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status); | |
2414 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; | |
2415 | break; | |
2416 | ||
2417 | case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED: | |
553448f6 CS |
2418 | dev_warn(&fsf_req->adapter->ccw_device->dev, |
2419 | "The adapter ran out of resources. There is no " | |
2420 | "handle available for unit 0x%016Lx on port 0x%016Lx.", | |
2421 | unit->fcp_lun, unit->port->wwpn); | |
1f6f7129 | 2422 | zfcp_erp_unit_failed(unit, 34, fsf_req); |
1da177e4 LT |
2423 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2424 | break; | |
2425 | ||
2426 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
2427 | switch (header->fsf_status_qual.word[0]) { |
2428 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
1da177e4 | 2429 | /* Re-establish link to port */ |
65a8d4e1 | 2430 | zfcp_test_link(unit->port); |
1da177e4 LT |
2431 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2432 | break; | |
2433 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
1da177e4 | 2434 | /* ERP strategy will escalate */ |
1da177e4 LT |
2435 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2436 | break; | |
1da177e4 LT |
2437 | } |
2438 | break; | |
2439 | ||
2440 | case FSF_INVALID_COMMAND_OPTION: | |
1da177e4 LT |
2441 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2442 | retval = -EINVAL; | |
2443 | break; | |
2444 | ||
2445 | case FSF_GOOD: | |
1da177e4 LT |
2446 | /* save LUN handle assigned by FSF */ |
2447 | unit->handle = header->lun_handle; | |
1da177e4 LT |
2448 | /* mark unit as open */ |
2449 | atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); | |
aef4a983 MS |
2450 | |
2451 | if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE) && | |
2452 | (adapter->adapter_features & FSF_FEATURE_LUN_SHARING) && | |
2453 | (adapter->ccw_device->id.dev_model != ZFCP_DEVICE_MODEL_PRIV)) { | |
2454 | exclusive = (bottom->lun_access_info & | |
2455 | FSF_UNIT_ACCESS_EXCLUSIVE); | |
2456 | readwrite = (bottom->lun_access_info & | |
2457 | FSF_UNIT_ACCESS_OUTBOUND_TRANSFER); | |
2458 | ||
1da177e4 LT |
2459 | if (!exclusive) |
2460 | atomic_set_mask(ZFCP_STATUS_UNIT_SHARED, | |
2461 | &unit->status); | |
2462 | ||
2463 | if (!readwrite) { | |
2464 | atomic_set_mask(ZFCP_STATUS_UNIT_READONLY, | |
2465 | &unit->status); | |
553448f6 CS |
2466 | dev_info(&fsf_req->adapter->ccw_device->dev, |
2467 | "Read-only access for unit 0x%016Lx " | |
2468 | "on port 0x%016Lx.\n", | |
2469 | unit->fcp_lun, unit->port->wwpn); | |
1da177e4 LT |
2470 | } |
2471 | ||
2472 | if (exclusive && !readwrite) { | |
553448f6 CS |
2473 | dev_err(&fsf_req->adapter->ccw_device->dev, |
2474 | "Exclusive access of read-only unit " | |
2475 | "0x%016Lx on port 0x%016Lx not " | |
2476 | "supported, disabling unit.\n", | |
2477 | unit->fcp_lun, unit->port->wwpn); | |
1f6f7129 | 2478 | zfcp_erp_unit_failed(unit, 35, fsf_req); |
1da177e4 | 2479 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1f6f7129 | 2480 | zfcp_erp_unit_shutdown(unit, 0, 80, fsf_req); |
1da177e4 | 2481 | } else if (!exclusive && readwrite) { |
553448f6 CS |
2482 | dev_err(&fsf_req->adapter->ccw_device->dev, |
2483 | "Shared access of read-write unit " | |
2484 | "0x%016Lx on port 0x%016Lx not " | |
2485 | "supported, disabling unit.\n", | |
2486 | unit->fcp_lun, unit->port->wwpn); | |
1f6f7129 | 2487 | zfcp_erp_unit_failed(unit, 36, fsf_req); |
1da177e4 | 2488 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1f6f7129 | 2489 | zfcp_erp_unit_shutdown(unit, 0, 81, fsf_req); |
1da177e4 LT |
2490 | } |
2491 | } | |
2492 | ||
2493 | retval = 0; | |
2494 | break; | |
1da177e4 LT |
2495 | } |
2496 | ||
2497 | skip_fsfstatus: | |
2498 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status); | |
2499 | return retval; | |
2500 | } | |
2501 | ||
2502 | /* | |
2503 | * function: zfcp_fsf_close_unit | |
2504 | * | |
2505 | * purpose: | |
2506 | * | |
2507 | * returns: address of fsf_req - request successfully initiated | |
41fa2ada | 2508 | * NULL - |
1da177e4 LT |
2509 | * |
2510 | * assumptions: This routine does not check whether the associated | |
2511 | * remote port/lun has already been opened. This should be | |
2512 | * done by calling routines. Otherwise some status | |
2513 | * may be presented by FSF | |
2514 | */ | |
2515 | int | |
2516 | zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) | |
2517 | { | |
2518 | volatile struct qdio_buffer_element *sbale; | |
2abbe866 | 2519 | struct zfcp_fsf_req *fsf_req; |
1da177e4 LT |
2520 | unsigned long lock_flags; |
2521 | int retval = 0; | |
2522 | ||
2523 | /* setup new FSF request */ | |
2524 | retval = zfcp_fsf_req_create(erp_action->adapter, | |
2525 | FSF_QTCB_CLOSE_LUN, | |
2526 | ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP, | |
2527 | erp_action->adapter->pool.fsf_req_erp, | |
2abbe866 | 2528 | &lock_flags, &fsf_req); |
553448f6 | 2529 | if (retval < 0) |
1da177e4 | 2530 | goto out; |
1da177e4 | 2531 | |
00bab910 | 2532 | sbale = zfcp_qdio_sbale_req(fsf_req); |
1da177e4 LT |
2533 | sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; |
2534 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
2535 | ||
2abbe866 AH |
2536 | fsf_req->qtcb->header.port_handle = erp_action->port->handle; |
2537 | fsf_req->qtcb->header.lun_handle = erp_action->unit->handle; | |
1da177e4 | 2538 | atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status); |
2abbe866 AH |
2539 | fsf_req->data = (unsigned long) erp_action->unit; |
2540 | fsf_req->erp_action = erp_action; | |
2541 | erp_action->fsf_req = fsf_req; | |
1da177e4 | 2542 | |
2abbe866 AH |
2543 | zfcp_erp_start_timer(fsf_req); |
2544 | retval = zfcp_fsf_req_send(erp_action->fsf_req); | |
1da177e4 | 2545 | if (retval) { |
2abbe866 | 2546 | zfcp_fsf_req_free(fsf_req); |
1da177e4 LT |
2547 | erp_action->fsf_req = NULL; |
2548 | goto out; | |
2549 | } | |
2550 | ||
1da177e4 | 2551 | out: |
00bab910 | 2552 | write_unlock_irqrestore(&erp_action->adapter->req_q.lock, lock_flags); |
1da177e4 LT |
2553 | return retval; |
2554 | } | |
2555 | ||
2556 | /* | |
2557 | * function: zfcp_fsf_close_unit_handler | |
2558 | * | |
2559 | * purpose: is called for finished Close LUN FSF command | |
2560 | * | |
2561 | * returns: | |
2562 | */ | |
2563 | static int | |
2564 | zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req) | |
2565 | { | |
2566 | int retval = -EINVAL; | |
2567 | struct zfcp_unit *unit; | |
2568 | ||
059c97d0 | 2569 | unit = (struct zfcp_unit *) fsf_req->data; |
1da177e4 LT |
2570 | |
2571 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { | |
2572 | /* don't change unit status in our bookkeeping */ | |
2573 | goto skip_fsfstatus; | |
2574 | } | |
2575 | ||
2576 | /* evaluate FSF status in QTCB */ | |
2577 | switch (fsf_req->qtcb->header.fsf_status) { | |
2578 | ||
2579 | case FSF_PORT_HANDLE_NOT_VALID: | |
1f6f7129 | 2580 | zfcp_erp_adapter_reopen(unit->port->adapter, 0, 110, fsf_req); |
1da177e4 LT |
2581 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2582 | break; | |
2583 | ||
2584 | case FSF_LUN_HANDLE_NOT_VALID: | |
1f6f7129 | 2585 | zfcp_erp_port_reopen(unit->port, 0, 111, fsf_req); |
1da177e4 LT |
2586 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2587 | break; | |
2588 | ||
2589 | case FSF_PORT_BOXED: | |
1f6f7129 | 2590 | zfcp_erp_port_boxed(unit->port, 52, fsf_req); |
1da177e4 LT |
2591 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | |
2592 | ZFCP_STATUS_FSFREQ_RETRY; | |
2593 | break; | |
2594 | ||
2595 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
2596 | switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) { |
2597 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
1da177e4 | 2598 | /* re-establish link to port */ |
65a8d4e1 | 2599 | zfcp_test_link(unit->port); |
1da177e4 LT |
2600 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2601 | break; | |
2602 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
1da177e4 | 2603 | /* ERP strategy will escalate */ |
1da177e4 LT |
2604 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2605 | break; | |
2606 | default: | |
1da177e4 LT |
2607 | break; |
2608 | } | |
2609 | break; | |
2610 | ||
2611 | case FSF_GOOD: | |
1da177e4 LT |
2612 | /* mark unit as closed */ |
2613 | atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status); | |
2614 | retval = 0; | |
2615 | break; | |
1da177e4 LT |
2616 | } |
2617 | ||
2618 | skip_fsfstatus: | |
2619 | atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status); | |
2620 | return retval; | |
2621 | } | |
2622 | ||
2623 | /** | |
2624 | * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command) | |
2625 | * @adapter: adapter where scsi command is issued | |
2626 | * @unit: unit where command is sent to | |
2627 | * @scsi_cmnd: scsi command to be sent | |
2628 | * @timer: timer to be started when request is initiated | |
2629 | * @req_flags: flags for fsf_request | |
2630 | */ | |
2631 | int | |
2632 | zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter, | |
2633 | struct zfcp_unit *unit, | |
2634 | struct scsi_cmnd * scsi_cmnd, | |
2abbe866 | 2635 | int use_timer, int req_flags) |
1da177e4 LT |
2636 | { |
2637 | struct zfcp_fsf_req *fsf_req = NULL; | |
2638 | struct fcp_cmnd_iu *fcp_cmnd_iu; | |
2639 | unsigned int sbtype; | |
2640 | unsigned long lock_flags; | |
2641 | int real_bytes = 0; | |
2642 | int retval = 0; | |
2643 | int mask; | |
2644 | ||
2645 | /* setup new FSF request */ | |
2646 | retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, | |
2647 | adapter->pool.fsf_req_scsi, | |
2648 | &lock_flags, &fsf_req); | |
553448f6 | 2649 | if (unlikely(retval < 0)) |
1da177e4 | 2650 | goto failed_req_create; |
1da177e4 | 2651 | |
ba172420 CS |
2652 | if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, |
2653 | &unit->status))) { | |
2654 | retval = -EBUSY; | |
2655 | goto unit_blocked; | |
2656 | } | |
2657 | ||
059c97d0 AH |
2658 | zfcp_unit_get(unit); |
2659 | fsf_req->unit = unit; | |
1da177e4 | 2660 | |
059c97d0 | 2661 | /* associate FSF request with SCSI request (for look up on abort) */ |
4eff4a36 | 2662 | scsi_cmnd->host_scribble = (unsigned char *) fsf_req->req_id; |
059c97d0 AH |
2663 | |
2664 | /* associate SCSI command with FSF request */ | |
2665 | fsf_req->data = (unsigned long) scsi_cmnd; | |
1da177e4 LT |
2666 | |
2667 | /* set handles of unit and its parent port in QTCB */ | |
2668 | fsf_req->qtcb->header.lun_handle = unit->handle; | |
2669 | fsf_req->qtcb->header.port_handle = unit->port->handle; | |
2670 | ||
2671 | /* FSF does not define the structure of the FCP_CMND IU */ | |
2672 | fcp_cmnd_iu = (struct fcp_cmnd_iu *) | |
2673 | &(fsf_req->qtcb->bottom.io.fcp_cmnd); | |
2674 | ||
2675 | /* | |
2676 | * set depending on data direction: | |
2677 | * data direction bits in SBALE (SB Type) | |
2678 | * data direction bits in QTCB | |
2679 | * data direction bits in FCP_CMND IU | |
2680 | */ | |
2681 | switch (scsi_cmnd->sc_data_direction) { | |
2682 | case DMA_NONE: | |
1da177e4 LT |
2683 | fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; |
2684 | /* | |
2685 | * FIXME(qdio): | |
2686 | * what is the correct type for commands | |
2687 | * without 'real' data buffers? | |
2688 | */ | |
2689 | sbtype = SBAL_FLAGS0_TYPE_READ; | |
2690 | break; | |
2691 | case DMA_FROM_DEVICE: | |
1da177e4 LT |
2692 | fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ; |
2693 | sbtype = SBAL_FLAGS0_TYPE_READ; | |
2694 | fcp_cmnd_iu->rddata = 1; | |
2695 | break; | |
2696 | case DMA_TO_DEVICE: | |
1da177e4 LT |
2697 | fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE; |
2698 | sbtype = SBAL_FLAGS0_TYPE_WRITE; | |
2699 | fcp_cmnd_iu->wddata = 1; | |
2700 | break; | |
2701 | case DMA_BIDIRECTIONAL: | |
1da177e4 LT |
2702 | default: |
2703 | /* | |
2704 | * dummy, catch this condition earlier | |
2705 | * in zfcp_scsi_queuecommand | |
2706 | */ | |
2707 | goto failed_scsi_cmnd; | |
2708 | } | |
2709 | ||
2710 | /* set FC service class in QTCB (3 per default) */ | |
06506d00 | 2711 | fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT; |
1da177e4 LT |
2712 | |
2713 | /* set FCP_LUN in FCP_CMND IU in QTCB */ | |
2714 | fcp_cmnd_iu->fcp_lun = unit->fcp_lun; | |
2715 | ||
2716 | mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED; | |
2717 | ||
2718 | /* set task attributes in FCP_CMND IU in QTCB */ | |
2719 | if (likely((scsi_cmnd->device->simple_tags) || | |
2720 | (atomic_test_mask(mask, &unit->status)))) | |
2721 | fcp_cmnd_iu->task_attribute = SIMPLE_Q; | |
2722 | else | |
2723 | fcp_cmnd_iu->task_attribute = UNTAGGED; | |
2724 | ||
2725 | /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */ | |
553448f6 | 2726 | if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) |
1da177e4 LT |
2727 | fcp_cmnd_iu->add_fcp_cdb_length |
2728 | = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2; | |
1da177e4 LT |
2729 | /* |
2730 | * copy SCSI CDB (including additional length, if any) to | |
2731 | * FCP_CDB in FCP_CMND IU in QTCB | |
2732 | */ | |
2733 | memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len); | |
2734 | ||
2735 | /* FCP CMND IU length in QTCB */ | |
2736 | fsf_req->qtcb->bottom.io.fcp_cmnd_length = | |
2737 | sizeof (struct fcp_cmnd_iu) + | |
2738 | fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t); | |
2739 | ||
2740 | /* generate SBALEs from data buffer */ | |
00bab910 SS |
2741 | real_bytes = zfcp_qdio_sbals_from_sg(fsf_req, sbtype, |
2742 | scsi_sglist(scsi_cmnd), | |
2743 | ZFCP_MAX_SBALS_PER_REQ); | |
1da177e4 | 2744 | if (unlikely(real_bytes < 0)) { |
553448f6 | 2745 | if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) |
2282f658 | 2746 | retval = -EIO; |
553448f6 CS |
2747 | else { |
2748 | dev_err(&adapter->ccw_device->dev, | |
2749 | "SCSI request too large. " | |
2750 | "Shutting down unit 0x%016Lx on port " | |
2751 | "0x%016Lx.\n", unit->fcp_lun, | |
2752 | unit->port->wwpn); | |
1f6f7129 | 2753 | zfcp_erp_unit_shutdown(unit, 0, 131, fsf_req); |
2282f658 | 2754 | retval = -EINVAL; |
1da177e4 LT |
2755 | } |
2756 | goto no_fit; | |
2757 | } | |
2758 | ||
2759 | /* set length of FCP data length in FCP_CMND IU in QTCB */ | |
2760 | zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes); | |
2761 | ||
2abbe866 AH |
2762 | if (use_timer) |
2763 | zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); | |
2764 | ||
2765 | retval = zfcp_fsf_req_send(fsf_req); | |
553448f6 | 2766 | if (unlikely(retval < 0)) |
1da177e4 | 2767 | goto send_failed; |
1da177e4 | 2768 | |
1da177e4 LT |
2769 | goto success; |
2770 | ||
2771 | send_failed: | |
2772 | no_fit: | |
2773 | failed_scsi_cmnd: | |
059c97d0 | 2774 | zfcp_unit_put(unit); |
57b7658a | 2775 | unit_blocked: |
1da177e4 LT |
2776 | zfcp_fsf_req_free(fsf_req); |
2777 | fsf_req = NULL; | |
2778 | scsi_cmnd->host_scribble = NULL; | |
2779 | success: | |
2780 | failed_req_create: | |
00bab910 | 2781 | write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); |
1da177e4 LT |
2782 | return retval; |
2783 | } | |
2784 | ||
1da177e4 LT |
2785 | struct zfcp_fsf_req * |
2786 | zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter, | |
2787 | struct zfcp_unit *unit, | |
2788 | u8 tm_flags, int req_flags) | |
2789 | { | |
2790 | struct zfcp_fsf_req *fsf_req = NULL; | |
2791 | int retval = 0; | |
2792 | struct fcp_cmnd_iu *fcp_cmnd_iu; | |
2793 | unsigned long lock_flags; | |
2794 | volatile struct qdio_buffer_element *sbale; | |
2795 | ||
2796 | /* setup new FSF request */ | |
2797 | retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags, | |
2798 | adapter->pool.fsf_req_scsi, | |
2799 | &lock_flags, &fsf_req); | |
553448f6 | 2800 | if (retval < 0) |
1da177e4 | 2801 | goto out; |
1da177e4 | 2802 | |
fdf23452 CS |
2803 | if (unlikely(!atomic_test_mask(ZFCP_STATUS_COMMON_UNBLOCKED, |
2804 | &unit->status))) | |
2805 | goto unit_blocked; | |
2806 | ||
1da177e4 LT |
2807 | /* |
2808 | * Used to decide on proper handler in the return path, | |
2809 | * could be either zfcp_fsf_send_fcp_command_task_handler or | |
2810 | * zfcp_fsf_send_fcp_command_task_management_handler */ | |
2811 | ||
2812 | fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT; | |
2813 | ||
2814 | /* | |
2815 | * hold a pointer to the unit being target of this | |
2816 | * task management request | |
2817 | */ | |
059c97d0 | 2818 | fsf_req->data = (unsigned long) unit; |
1da177e4 LT |
2819 | |
2820 | /* set FSF related fields in QTCB */ | |
2821 | fsf_req->qtcb->header.lun_handle = unit->handle; | |
2822 | fsf_req->qtcb->header.port_handle = unit->port->handle; | |
2823 | fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND; | |
06506d00 | 2824 | fsf_req->qtcb->bottom.io.service_class = ZFCP_FC_SERVICE_CLASS_DEFAULT; |
1da177e4 LT |
2825 | fsf_req->qtcb->bottom.io.fcp_cmnd_length = |
2826 | sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t); | |
2827 | ||
00bab910 | 2828 | sbale = zfcp_qdio_sbale_req(fsf_req); |
1da177e4 LT |
2829 | sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE; |
2830 | sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; | |
2831 | ||
2832 | /* set FCP related fields in FCP_CMND IU in QTCB */ | |
2833 | fcp_cmnd_iu = (struct fcp_cmnd_iu *) | |
2834 | &(fsf_req->qtcb->bottom.io.fcp_cmnd); | |
2835 | fcp_cmnd_iu->fcp_lun = unit->fcp_lun; | |
2836 | fcp_cmnd_iu->task_management_flags = tm_flags; | |
2837 | ||
2abbe866 AH |
2838 | zfcp_fsf_start_timer(fsf_req, ZFCP_SCSI_ER_TIMEOUT); |
2839 | retval = zfcp_fsf_req_send(fsf_req); | |
fdf23452 | 2840 | if (!retval) |
1da177e4 | 2841 | goto out; |
1da177e4 | 2842 | |
fdf23452 CS |
2843 | unit_blocked: |
2844 | zfcp_fsf_req_free(fsf_req); | |
2845 | fsf_req = NULL; | |
2846 | ||
1da177e4 | 2847 | out: |
00bab910 | 2848 | write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); |
1da177e4 LT |
2849 | return fsf_req; |
2850 | } | |
2851 | ||
c9615858 CS |
2852 | static void zfcp_fsf_update_lat(struct fsf_latency_record *lat_rec, u32 lat) |
2853 | { | |
2854 | lat_rec->sum += lat; | |
2855 | if (lat_rec->min > lat) | |
2856 | lat_rec->min = lat; | |
2857 | if (lat_rec->max < lat) | |
2858 | lat_rec->max = lat; | |
2859 | } | |
2860 | ||
2861 | static void zfcp_fsf_req_latency(struct zfcp_fsf_req *fsf_req) | |
2862 | { | |
2863 | struct fsf_qual_latency_info *lat_inf; | |
2864 | struct latency_cont *lat; | |
2865 | struct zfcp_unit *unit; | |
2866 | unsigned long flags; | |
2867 | ||
2868 | lat_inf = &fsf_req->qtcb->prefix.prot_status_qual.latency_info; | |
2869 | unit = fsf_req->unit; | |
2870 | ||
2871 | switch (fsf_req->qtcb->bottom.io.data_direction) { | |
2872 | case FSF_DATADIR_READ: | |
2873 | lat = &unit->latencies.read; | |
2874 | break; | |
2875 | case FSF_DATADIR_WRITE: | |
2876 | lat = &unit->latencies.write; | |
2877 | break; | |
2878 | case FSF_DATADIR_CMND: | |
2879 | lat = &unit->latencies.cmd; | |
2880 | break; | |
2881 | default: | |
2882 | return; | |
2883 | } | |
2884 | ||
2885 | spin_lock_irqsave(&unit->latencies.lock, flags); | |
2886 | zfcp_fsf_update_lat(&lat->channel, lat_inf->channel_lat); | |
2887 | zfcp_fsf_update_lat(&lat->fabric, lat_inf->fabric_lat); | |
2888 | lat->counter++; | |
2889 | spin_unlock_irqrestore(&unit->latencies.lock, flags); | |
2890 | } | |
2891 | ||
1da177e4 LT |
2892 | /* |
2893 | * function: zfcp_fsf_send_fcp_command_handler | |
2894 | * | |
2895 | * purpose: is called for finished Send FCP Command | |
2896 | * | |
41fa2ada | 2897 | * returns: |
1da177e4 LT |
2898 | */ |
2899 | static int | |
2900 | zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req) | |
2901 | { | |
2902 | int retval = -EINVAL; | |
2903 | struct zfcp_unit *unit; | |
2904 | struct fsf_qtcb_header *header; | |
1da177e4 LT |
2905 | |
2906 | header = &fsf_req->qtcb->header; | |
2907 | ||
2908 | if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)) | |
059c97d0 | 2909 | unit = (struct zfcp_unit *) fsf_req->data; |
1da177e4 | 2910 | else |
059c97d0 | 2911 | unit = fsf_req->unit; |
1da177e4 LT |
2912 | |
2913 | if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { | |
2914 | /* go directly to calls of special handlers */ | |
2915 | goto skip_fsfstatus; | |
2916 | } | |
2917 | ||
2918 | /* evaluate FSF status in QTCB */ | |
2919 | switch (header->fsf_status) { | |
2920 | ||
2921 | case FSF_PORT_HANDLE_NOT_VALID: | |
1f6f7129 | 2922 | zfcp_erp_adapter_reopen(unit->port->adapter, 0, 112, fsf_req); |
1da177e4 LT |
2923 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2924 | break; | |
2925 | ||
2926 | case FSF_LUN_HANDLE_NOT_VALID: | |
1f6f7129 | 2927 | zfcp_erp_port_reopen(unit->port, 0, 113, fsf_req); |
1da177e4 LT |
2928 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2929 | break; | |
2930 | ||
2931 | case FSF_HANDLE_MISMATCH: | |
1f6f7129 | 2932 | zfcp_erp_adapter_reopen(unit->port->adapter, 0, 114, fsf_req); |
1da177e4 LT |
2933 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2934 | break; | |
2935 | ||
2936 | case FSF_SERVICE_CLASS_NOT_SUPPORTED: | |
553448f6 | 2937 | zfcp_fsf_class_not_supp(fsf_req); |
1da177e4 LT |
2938 | break; |
2939 | ||
2940 | case FSF_FCPLUN_NOT_VALID: | |
1f6f7129 | 2941 | zfcp_erp_port_reopen(unit->port, 0, 115, fsf_req); |
1da177e4 LT |
2942 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2943 | break; | |
2944 | ||
2945 | case FSF_ACCESS_DENIED: | |
553448f6 | 2946 | zfcp_fsf_access_denied_unit(fsf_req, unit); |
1da177e4 LT |
2947 | break; |
2948 | ||
2949 | case FSF_DIRECTION_INDICATOR_NOT_VALID: | |
553448f6 CS |
2950 | dev_err(&fsf_req->adapter->ccw_device->dev, |
2951 | "Invalid data direction (%d) given for unit 0x%016Lx " | |
2952 | "on port 0x%016Lx, shutting down adapter.\n", | |
2953 | fsf_req->qtcb->bottom.io.data_direction, | |
2954 | unit->fcp_lun, unit->port->wwpn); | |
1f6f7129 | 2955 | zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 133, fsf_req); |
1da177e4 LT |
2956 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2957 | break; | |
2958 | ||
2959 | case FSF_CMND_LENGTH_NOT_VALID: | |
553448f6 CS |
2960 | dev_err(&fsf_req->adapter->ccw_device->dev, |
2961 | "An invalid control-data-block length field (%d) " | |
2962 | "was found in a command for unit 0x%016Lx on port " | |
2963 | "0x%016Lx. Shutting down adapter.\n", | |
2964 | fsf_req->qtcb->bottom.io.fcp_cmnd_length, | |
2965 | unit->fcp_lun, unit->port->wwpn); | |
1f6f7129 | 2966 | zfcp_erp_adapter_shutdown(unit->port->adapter, 0, 134, fsf_req); |
1da177e4 LT |
2967 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
2968 | break; | |
2969 | ||
2970 | case FSF_PORT_BOXED: | |
1f6f7129 | 2971 | zfcp_erp_port_boxed(unit->port, 53, fsf_req); |
1da177e4 LT |
2972 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR | |
2973 | ZFCP_STATUS_FSFREQ_RETRY; | |
2974 | break; | |
2975 | ||
2976 | case FSF_LUN_BOXED: | |
1f6f7129 | 2977 | zfcp_erp_unit_boxed(unit, 54, fsf_req); |
1da177e4 LT |
2978 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2979 | | ZFCP_STATUS_FSFREQ_RETRY; | |
2980 | break; | |
2981 | ||
2982 | case FSF_ADAPTER_STATUS_AVAILABLE: | |
1da177e4 LT |
2983 | switch (header->fsf_status_qual.word[0]) { |
2984 | case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: | |
1da177e4 | 2985 | /* re-establish link to port */ |
65a8d4e1 | 2986 | zfcp_test_link(unit->port); |
1da177e4 LT |
2987 | break; |
2988 | case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: | |
1da177e4 LT |
2989 | /* FIXME(hw) need proper specs for proper action */ |
2990 | /* let scsi stack deal with retries and escalation */ | |
1da177e4 | 2991 | break; |
1da177e4 | 2992 | } |
516a4201 | 2993 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1da177e4 LT |
2994 | break; |
2995 | ||
2996 | case FSF_GOOD: | |
1da177e4 LT |
2997 | break; |
2998 | ||
2999 | case FSF_FCP_RSP_AVAILABLE: | |
1da177e4 | 3000 | break; |
1da177e4 LT |
3001 | } |
3002 | ||
3003 | skip_fsfstatus: | |
3004 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) { | |
3005 | retval = | |
3006 | zfcp_fsf_send_fcp_command_task_management_handler(fsf_req); | |
3007 | } else { | |
3008 | retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req); | |
059c97d0 AH |
3009 | fsf_req->unit = NULL; |
3010 | zfcp_unit_put(unit); | |
1da177e4 LT |
3011 | } |
3012 | return retval; | |
3013 | } | |
3014 | ||
3015 | /* | |
3016 | * function: zfcp_fsf_send_fcp_command_task_handler | |
3017 | * | |
3018 | * purpose: evaluates FCP_RSP IU | |
3019 | * | |
41fa2ada | 3020 | * returns: |
1da177e4 LT |
3021 | */ |
3022 | static int | |
3023 | zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req) | |
3024 | { | |
3025 | int retval = 0; | |
3026 | struct scsi_cmnd *scpnt; | |
3027 | struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) | |
3028 | &(fsf_req->qtcb->bottom.io.fcp_rsp); | |
1da177e4 | 3029 | u32 sns_len; |
f76af7d7 | 3030 | char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1]; |
1da177e4 | 3031 | unsigned long flags; |
1da177e4 LT |
3032 | |
3033 | read_lock_irqsave(&fsf_req->adapter->abort_lock, flags); | |
059c97d0 | 3034 | scpnt = (struct scsi_cmnd *) fsf_req->data; |
553448f6 | 3035 | if (unlikely(!scpnt)) |
1da177e4 | 3036 | goto out; |
553448f6 | 3037 | |
1da177e4 LT |
3038 | if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) { |
3039 | /* FIXME: (design) mid-layer should handle DID_ABORT like | |
3040 | * DID_SOFT_ERROR by retrying the request for devices | |
3041 | * that allow retries. | |
3042 | */ | |
feac6a07 MP |
3043 | set_host_byte(scpnt, DID_SOFT_ERROR); |
3044 | set_driver_byte(scpnt, SUGGEST_RETRY); | |
1da177e4 LT |
3045 | goto skip_fsfstatus; |
3046 | } | |
3047 | ||
3048 | if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) { | |
feac6a07 | 3049 | set_host_byte(scpnt, DID_ERROR); |
1da177e4 LT |
3050 | goto skip_fsfstatus; |
3051 | } | |
3052 | ||
3053 | /* set message byte of result in SCSI command */ | |
feac6a07 | 3054 | set_msg_byte(scpnt, COMMAND_COMPLETE); |
1da177e4 LT |
3055 | |
3056 | /* | |
3057 | * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte | |
3058 | * of result in SCSI command | |
3059 | */ | |
3060 | scpnt->result |= fcp_rsp_iu->scsi_status; | |
1da177e4 | 3061 | |
c9615858 CS |
3062 | if (fsf_req->adapter->adapter_features & FSF_FEATURE_MEASUREMENT_DATA) |
3063 | zfcp_fsf_req_latency(fsf_req); | |
3064 | ||
1da177e4 LT |
3065 | /* check FCP_RSP_INFO */ |
3066 | if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) { | |
1da177e4 LT |
3067 | switch (fcp_rsp_info[3]) { |
3068 | case RSP_CODE_GOOD: | |
1da177e4 | 3069 | /* ok, continue */ |
feac6a07 | 3070 | set_host_byte(scpnt, DID_OK); |
1da177e4 LT |
3071 | break; |
3072 | case RSP_CODE_LENGTH_MISMATCH: | |
1da177e4 | 3073 | /* hardware bug */ |
feac6a07 | 3074 | set_host_byte(scpnt, DID_ERROR); |
1da177e4 LT |
3075 | goto skip_fsfstatus; |
3076 | case RSP_CODE_FIELD_INVALID: | |
1da177e4 | 3077 | /* driver or hardware bug */ |
feac6a07 | 3078 | set_host_byte(scpnt, DID_ERROR); |
1da177e4 LT |
3079 | goto skip_fsfstatus; |
3080 | case RSP_CODE_RO_MISMATCH: | |
1da177e4 | 3081 | /* hardware bug */ |
feac6a07 | 3082 | set_host_byte(scpnt, DID_ERROR); |
1da177e4 LT |
3083 | goto skip_fsfstatus; |
3084 | default: | |
553448f6 | 3085 | /* invalid FCP response code */ |
feac6a07 | 3086 | set_host_byte(scpnt, DID_ERROR); |
6f71d9bc | 3087 | goto skip_fsfstatus; |
1da177e4 LT |
3088 | } |
3089 | } | |
3090 | ||
3091 | /* check for sense data */ | |
3092 | if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) { | |
3093 | sns_len = FSF_FCP_RSP_SIZE - | |
3094 | sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len; | |
1da177e4 | 3095 | sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE); |
1da177e4 | 3096 | sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len); |
1da177e4 | 3097 | |
9d058ecf | 3098 | memcpy(scpnt->sense_buffer, |
1da177e4 | 3099 | zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len); |
1da177e4 LT |
3100 | } |
3101 | ||
3102 | /* check for underrun */ | |
3103 | if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) { | |
7936a892 FT |
3104 | scsi_set_resid(scpnt, fcp_rsp_iu->fcp_resid); |
3105 | if (scsi_bufflen(scpnt) - scsi_get_resid(scpnt) < | |
3106 | scpnt->underflow) | |
feac6a07 | 3107 | set_host_byte(scpnt, DID_ERROR); |
1da177e4 LT |
3108 | } |
3109 | ||
3110 | skip_fsfstatus: | |
8a36e453 | 3111 | if (scpnt->result != 0) |
ed829ad6 | 3112 | zfcp_scsi_dbf_event_result("erro", 3, fsf_req->adapter, scpnt, fsf_req); |
8a36e453 | 3113 | else if (scpnt->retries > 0) |
ed829ad6 | 3114 | zfcp_scsi_dbf_event_result("retr", 4, fsf_req->adapter, scpnt, fsf_req); |
8a36e453 | 3115 | else |
ed829ad6 | 3116 | zfcp_scsi_dbf_event_result("norm", 6, fsf_req->adapter, scpnt, fsf_req); |
1da177e4 LT |
3117 | |
3118 | /* cleanup pointer (need this especially for abort) */ | |
3119 | scpnt->host_scribble = NULL; | |
3120 | ||
1da177e4 | 3121 | /* always call back */ |
1da177e4 LT |
3122 | (scpnt->scsi_done) (scpnt); |
3123 | ||
3124 | /* | |
3125 | * We must hold this lock until scsi_done has been called. | |
3126 | * Otherwise we may call scsi_done after abort regarding this | |
3127 | * command has completed. | |
3128 | * Note: scsi_done must not block! | |
3129 | */ | |
3130 | out: | |
3131 | read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags); | |
3132 | return retval; | |
3133 | } | |
3134 | ||
3135 | /* | |
3136 | * function: zfcp_fsf_send_fcp_command_task_management_handler | |
3137 | * | |
3138 | * purpose: evaluates FCP_RSP IU | |
3139 | * | |
41fa2ada | 3140 | * returns: |
1da177e4 LT |
3141 | */ |
3142 | static int | |
3143 | zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req) | |
3144 | { | |
3145 | int retval = 0; | |
3146 | struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *) | |
3147 | &(fsf_req->qtcb->bottom.io.fcp_rsp); | |
f76af7d7 | 3148 | char *fcp_rsp_info = (unsigned char *) &fcp_rsp_iu[1]; |
1da177e4 | 3149 | |
1da177e4 LT |
3150 | if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) { |
3151 | fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; | |
3152 | goto skip_fsfstatus; | |
3153 | } | |
3154 | ||
3155 | /* check FCP_RSP_INFO */ | |
3156 | switch (fcp_rsp_info[3]) { | |
3157 | case RSP_CODE_GOOD: | |
1da177e4 | 3158 | /* ok, continue */ |
1da177e4 LT |
3159 | break; |
3160 | case RSP_CODE_TASKMAN_UNSUPP: | |
1da177e4 LT |
3161 | fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP; |
3162 | break; | |
3163 | case RSP_CODE_TASKMAN_FAILED: | |
1da177e4 LT |
3164 | fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; |
3165 | break; | |
3166 | default: | |
553448f6 | 3167 | /* invalid FCP response code */ |
1da177e4 LT |
3168 | fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED; |
3169 | } | |
3170 | ||
3171 | skip_fsfstatus: | |
3172 | return retval; | |
3173 | } | |
3174 | ||
3175 | ||
3176 | /* | |
3177 | * function: zfcp_fsf_control_file | |
3178 | * | |
3179 | * purpose: Initiator of the control file upload/download FSF requests | |
3180 | * | |
3181 | * returns: 0 - FSF request is successfuly created and queued | |
3182 | * -EOPNOTSUPP - The FCP adapter does not have Control File support | |
3183 | * -EINVAL - Invalid direction specified | |
3184 | * -ENOMEM - Insufficient memory | |
3185 | * -EPERM - Cannot create FSF request or place it in QDIO queue | |
3186 | */ | |
45633fdc CS |
3187 | struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter, |
3188 | struct zfcp_fsf_cfdc *fsf_cfdc) | |
1da177e4 LT |
3189 | { |
3190 | struct zfcp_fsf_req *fsf_req; | |
3191 | struct fsf_qtcb_bottom_support *bottom; | |
3192 | volatile struct qdio_buffer_element *sbale; | |
1da177e4 | 3193 | unsigned long lock_flags; |
1da177e4 | 3194 | int direction; |
45633fdc CS |
3195 | int retval; |
3196 | int bytes; | |
1da177e4 | 3197 | |
45633fdc CS |
3198 | if (!(adapter->adapter_features & FSF_FEATURE_CFDC)) |
3199 | return ERR_PTR(-EOPNOTSUPP); | |
1da177e4 | 3200 | |
45633fdc | 3201 | switch (fsf_cfdc->command) { |
1da177e4 LT |
3202 | case FSF_QTCB_DOWNLOAD_CONTROL_FILE: |
3203 | direction = SBAL_FLAGS0_TYPE_WRITE; | |
1da177e4 | 3204 | break; |
1da177e4 LT |
3205 | case FSF_QTCB_UPLOAD_CONTROL_FILE: |
3206 | direction = SBAL_FLAGS0_TYPE_READ; | |
3207 | break; | |
1da177e4 | 3208 | default: |
45633fdc | 3209 | return ERR_PTR(-EINVAL); |
1da177e4 LT |
3210 | } |
3211 | ||
45633fdc CS |
3212 | retval = zfcp_fsf_req_create(adapter, fsf_cfdc->command, |
3213 | ZFCP_WAIT_FOR_SBAL, | |
1da177e4 LT |
3214 | NULL, &lock_flags, &fsf_req); |
3215 | if (retval < 0) { | |
1da177e4 LT |
3216 | retval = -EPERM; |
3217 | goto unlock_queue_lock; | |
3218 | } | |
3219 | ||
00bab910 | 3220 | sbale = zfcp_qdio_sbale_req(fsf_req); |
1da177e4 LT |
3221 | sbale[0].flags |= direction; |
3222 | ||
3223 | bottom = &fsf_req->qtcb->bottom.support; | |
3224 | bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE; | |
45633fdc CS |
3225 | bottom->option = fsf_cfdc->option; |
3226 | ||
3227 | bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction, | |
00bab910 | 3228 | fsf_cfdc->sg, |
45633fdc CS |
3229 | ZFCP_MAX_SBALS_PER_REQ); |
3230 | if (bytes != ZFCP_CFDC_MAX_SIZE) { | |
3231 | retval = -ENOMEM; | |
3232 | goto free_fsf_req; | |
3233 | } | |
1da177e4 | 3234 | |
2abbe866 AH |
3235 | zfcp_fsf_start_timer(fsf_req, ZFCP_FSF_REQUEST_TIMEOUT); |
3236 | retval = zfcp_fsf_req_send(fsf_req); | |
1da177e4 | 3237 | if (retval < 0) { |
1da177e4 LT |
3238 | retval = -EPERM; |
3239 | goto free_fsf_req; | |
3240 | } | |
00bab910 | 3241 | write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); |
1da177e4 | 3242 | |
1da177e4 LT |
3243 | wait_event(fsf_req->completion_wq, |
3244 | fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED); | |
3245 | ||
45633fdc | 3246 | return fsf_req; |
1da177e4 LT |
3247 | |
3248 | free_fsf_req: | |
3249 | zfcp_fsf_req_free(fsf_req); | |
3250 | unlock_queue_lock: | |
00bab910 | 3251 | write_unlock_irqrestore(&adapter->req_q.lock, lock_flags); |
45633fdc | 3252 | return ERR_PTR(retval); |
1da177e4 LT |
3253 | } |
3254 | ||
45633fdc | 3255 | static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req) |
1da177e4 | 3256 | { |
45633fdc | 3257 | if (fsf_req->qtcb->header.fsf_status != FSF_GOOD) |
1da177e4 | 3258 | fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR; |
1da177e4 LT |
3259 | } |
3260 | ||
1da177e4 LT |
3261 | static inline int |
3262 | zfcp_fsf_req_sbal_check(unsigned long *flags, | |
3263 | struct zfcp_qdio_queue *queue, int needed) | |
3264 | { | |
00bab910 SS |
3265 | write_lock_irqsave(&queue->lock, *flags); |
3266 | if (likely(atomic_read(&queue->count) >= needed)) | |
1da177e4 | 3267 | return 1; |
00bab910 | 3268 | write_unlock_irqrestore(&queue->lock, *flags); |
1da177e4 LT |
3269 | return 0; |
3270 | } | |
3271 | ||
3272 | /* | |
3273 | * set qtcb pointer in fsf_req and initialize QTCB | |
3274 | */ | |
4d284cac | 3275 | static void |
8a36e453 | 3276 | zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req) |
1da177e4 LT |
3277 | { |
3278 | if (likely(fsf_req->qtcb != NULL)) { | |
fea9d6c7 VS |
3279 | fsf_req->qtcb->prefix.req_seq_no = |
3280 | fsf_req->adapter->fsf_req_seq_no; | |
3281 | fsf_req->qtcb->prefix.req_id = fsf_req->req_id; | |
1da177e4 | 3282 | fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION; |
fea9d6c7 VS |
3283 | fsf_req->qtcb->prefix.qtcb_type = |
3284 | fsf_qtcb_type[fsf_req->fsf_command]; | |
1da177e4 | 3285 | fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION; |
fea9d6c7 | 3286 | fsf_req->qtcb->header.req_handle = fsf_req->req_id; |
8a36e453 | 3287 | fsf_req->qtcb->header.fsf_command = fsf_req->fsf_command; |
1da177e4 LT |
3288 | } |
3289 | } | |
3290 | ||
3291 | /** | |
3292 | * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue | |
3293 | * @adapter: adapter for which request queue is examined | |
3294 | * @req_flags: flags indicating whether to wait for needed SBAL or not | |
3295 | * @lock_flags: lock_flags if queue_lock is taken | |
3296 | * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS | |
00bab910 | 3297 | * Locks: lock adapter->req_q->lock on success |
1da177e4 LT |
3298 | */ |
3299 | static int | |
3300 | zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags, | |
3301 | unsigned long *lock_flags) | |
3302 | { | |
3303 | long ret; | |
00bab910 | 3304 | struct zfcp_qdio_queue *req_q = &adapter->req_q; |
1da177e4 LT |
3305 | |
3306 | if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) { | |
3307 | ret = wait_event_interruptible_timeout(adapter->request_wq, | |
00bab910 | 3308 | zfcp_fsf_req_sbal_check(lock_flags, req_q, 1), |
1da177e4 LT |
3309 | ZFCP_SBAL_TIMEOUT); |
3310 | if (ret < 0) | |
3311 | return ret; | |
3312 | if (!ret) | |
3313 | return -EIO; | |
00bab910 | 3314 | } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_q, 1)) |
1da177e4 LT |
3315 | return -EIO; |
3316 | ||
3317 | return 0; | |
3318 | } | |
3319 | ||
3320 | /* | |
3321 | * function: zfcp_fsf_req_create | |
3322 | * | |
3323 | * purpose: create an FSF request at the specified adapter and | |
3324 | * setup common fields | |
3325 | * | |
3326 | * returns: -ENOMEM if there was insufficient memory for a request | |
3327 | * -EIO if no qdio buffers could be allocate to the request | |
3328 | * -EINVAL/-EPERM on bug conditions in req_dequeue | |
3329 | * 0 in success | |
3330 | * | |
3331 | * note: The created request is returned by reference. | |
3332 | * | |
3333 | * locks: lock of concerned request queue must not be held, | |
3334 | * but is held on completion (write, irqsave) | |
3335 | */ | |
3336 | int | |
3337 | zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags, | |
3338 | mempool_t *pool, unsigned long *lock_flags, | |
3339 | struct zfcp_fsf_req **fsf_req_p) | |
3340 | { | |
3341 | volatile struct qdio_buffer_element *sbale; | |
3342 | struct zfcp_fsf_req *fsf_req = NULL; | |
3343 | int ret = 0; | |
00bab910 | 3344 | struct zfcp_qdio_queue *req_q = &adapter->req_q; |
1da177e4 LT |
3345 | |
3346 | /* allocate new FSF request */ | |
3347 | fsf_req = zfcp_fsf_req_alloc(pool, req_flags); | |
553448f6 | 3348 | if (unlikely(!fsf_req)) { |
1da177e4 LT |
3349 | ret = -ENOMEM; |
3350 | goto failed_fsf_req; | |
3351 | } | |
3352 | ||
8a36e453 MS |
3353 | fsf_req->adapter = adapter; |
3354 | fsf_req->fsf_command = fsf_cmd; | |
fea9d6c7 | 3355 | INIT_LIST_HEAD(&fsf_req->list); |
2abbe866 | 3356 | init_timer(&fsf_req->timer); |
1da177e4 | 3357 | |
41fa2ada | 3358 | /* initialize waitqueue which may be used to wait on |
1da177e4 LT |
3359 | this request completion */ |
3360 | init_waitqueue_head(&fsf_req->completion_wq); | |
3361 | ||
3362 | ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags); | |
801e0ced | 3363 | if (ret < 0) |
1da177e4 | 3364 | goto failed_sbals; |
801e0ced CS |
3365 | |
3366 | /* this is serialized (we are holding req_queue-lock of adapter) */ | |
3367 | if (adapter->req_no == 0) | |
3368 | adapter->req_no++; | |
3369 | fsf_req->req_id = adapter->req_no++; | |
3370 | ||
3371 | zfcp_fsf_req_qtcb_init(fsf_req); | |
1da177e4 LT |
3372 | |
3373 | /* | |
3374 | * We hold queue_lock here. Check if QDIOUP is set and let request fail | |
3375 | * if it is not set (see also *_open_qdio and *_close_qdio). | |
3376 | */ | |
3377 | ||
3378 | if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) { | |
00bab910 | 3379 | write_unlock_irqrestore(&req_q->lock, *lock_flags); |
1da177e4 LT |
3380 | ret = -EIO; |
3381 | goto failed_sbals; | |
3382 | } | |
3383 | ||
8a36e453 MS |
3384 | if (fsf_req->qtcb) { |
3385 | fsf_req->seq_no = adapter->fsf_req_seq_no; | |
3386 | fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no; | |
3387 | } | |
1da177e4 | 3388 | fsf_req->sbal_number = 1; |
00bab910 SS |
3389 | fsf_req->sbal_first = req_q->first; |
3390 | fsf_req->sbal_last = req_q->first; | |
1da177e4 LT |
3391 | fsf_req->sbale_curr = 1; |
3392 | ||
3393 | if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) { | |
3394 | fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; | |
3395 | } | |
3396 | ||
00bab910 | 3397 | sbale = zfcp_qdio_sbale_req(fsf_req); |
1da177e4 LT |
3398 | |
3399 | /* setup common SBALE fields */ | |
fea9d6c7 | 3400 | sbale[0].addr = (void *) fsf_req->req_id; |
1da177e4 LT |
3401 | sbale[0].flags |= SBAL_FLAGS0_COMMAND; |
3402 | if (likely(fsf_req->qtcb != NULL)) { | |
3403 | sbale[1].addr = (void *) fsf_req->qtcb; | |
3404 | sbale[1].length = sizeof(struct fsf_qtcb); | |
3405 | } | |
3406 | ||
1da177e4 LT |
3407 | goto success; |
3408 | ||
3409 | failed_sbals: | |
3410 | /* dequeue new FSF request previously enqueued */ | |
3411 | zfcp_fsf_req_free(fsf_req); | |
3412 | fsf_req = NULL; | |
3413 | ||
3414 | failed_fsf_req: | |
00bab910 | 3415 | write_lock_irqsave(&req_q->lock, *lock_flags); |
1da177e4 LT |
3416 | success: |
3417 | *fsf_req_p = fsf_req; | |
3418 | return ret; | |
3419 | } | |
3420 | ||
3421 | /* | |
3422 | * function: zfcp_fsf_req_send | |
3423 | * | |
3424 | * purpose: start transfer of FSF request via QDIO | |
3425 | * | |
3426 | * returns: 0 - request transfer succesfully started | |
3427 | * !0 - start of request transfer failed | |
3428 | */ | |
2abbe866 | 3429 | static int zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req) |
1da177e4 LT |
3430 | { |
3431 | struct zfcp_adapter *adapter; | |
00bab910 | 3432 | struct zfcp_qdio_queue *req_q; |
1da177e4 | 3433 | volatile struct qdio_buffer_element *sbale; |
8a36e453 | 3434 | int inc_seq_no; |
1da177e4 LT |
3435 | int retval = 0; |
3436 | ||
3437 | adapter = fsf_req->adapter; | |
00bab910 | 3438 | req_q = &adapter->req_q; |
1da177e4 | 3439 | |
00bab910 | 3440 | sbale = zfcp_qdio_sbale_req(fsf_req); |
1da177e4 | 3441 | |
fea9d6c7 VS |
3442 | /* put allocated FSF request into hash table */ |
3443 | spin_lock(&adapter->req_list_lock); | |
3444 | zfcp_reqlist_add(adapter, fsf_req); | |
3445 | spin_unlock(&adapter->req_list_lock); | |
1da177e4 | 3446 | |
8a36e453 MS |
3447 | inc_seq_no = (fsf_req->qtcb != NULL); |
3448 | ||
8a36e453 MS |
3449 | fsf_req->issued = get_clock(); |
3450 | ||
00bab910 | 3451 | retval = zfcp_qdio_send(fsf_req); |
1da177e4 LT |
3452 | |
3453 | if (unlikely(retval)) { | |
3454 | /* Queues are down..... */ | |
2abbe866 | 3455 | del_timer(&fsf_req->timer); |
fea9d6c7 | 3456 | spin_lock(&adapter->req_list_lock); |
ca2d02c2 | 3457 | zfcp_reqlist_remove(adapter, fsf_req); |
fea9d6c7 VS |
3458 | spin_unlock(&adapter->req_list_lock); |
3459 | /* undo changes in request queue made for this request */ | |
00bab910 SS |
3460 | atomic_add(fsf_req->sbal_number, &req_q->count); |
3461 | req_q->first -= fsf_req->sbal_number; | |
3462 | req_q->first += QDIO_MAX_BUFFERS_PER_Q; | |
3463 | req_q->first %= QDIO_MAX_BUFFERS_PER_Q; | |
1f6f7129 | 3464 | zfcp_erp_adapter_reopen(adapter, 0, 116, fsf_req); |
00bab910 | 3465 | retval = -EIO; |
1da177e4 | 3466 | } else { |
1da177e4 LT |
3467 | /* |
3468 | * increase FSF sequence counter - | |
3469 | * this must only be done for request successfully enqueued to | |
3470 | * QDIO this rejected requests may be cleaned up by calling | |
3471 | * routines resulting in missing sequence counter values | |
3472 | * otherwise, | |
3473 | */ | |
8a36e453 | 3474 | |
1da177e4 | 3475 | /* Don't increase for unsolicited status */ |
8a36e453 | 3476 | if (inc_seq_no) |
1da177e4 | 3477 | adapter->fsf_req_seq_no++; |
1da177e4 LT |
3478 | } |
3479 | return retval; | |
3480 | } |